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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Mike Millerbd4f36d2007-10-24 10:30:34 +02002 * Disk Array driver for HP Smart Array controllers.
3 * (C) Copyright 2000, 2007 Hewlett-Packard Development Company, L.P.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
Mike Millerbd4f36d2007-10-24 10:30:34 +02007 * the Free Software Foundation; version 2 of the License.
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
Mike Millerbd4f36d2007-10-24 10:30:34 +020011 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
Mike Millerbd4f36d2007-10-24 10:30:34 +020016 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 * 02111-1307, USA.
Linus Torvalds1da177e2005-04-16 15:20:36 -070018 *
19 * Questions/Comments/Bugfixes to iss_storagedev@hp.com
20 *
21 */
22
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#include <linux/module.h>
24#include <linux/interrupt.h>
25#include <linux/types.h>
26#include <linux/pci.h>
Matthew Garrett19373352011-11-11 22:05:54 +010027#include <linux/pci-aspm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include <linux/kernel.h>
29#include <linux/slab.h>
30#include <linux/delay.h>
31#include <linux/major.h>
32#include <linux/fs.h>
33#include <linux/bio.h>
34#include <linux/blkpg.h>
35#include <linux/timer.h>
36#include <linux/proc_fs.h>
Mike Miller89b6e742008-02-21 08:54:03 +010037#include <linux/seq_file.h>
Bjorn Helgaas7c832832006-06-25 05:49:06 -070038#include <linux/init.h>
Randy Dunlap4d761602009-09-18 12:58:48 -070039#include <linux/jiffies.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#include <linux/hdreg.h>
41#include <linux/spinlock.h>
42#include <linux/compat.h>
Andrew Pattersonb368c9d2009-09-17 13:46:58 -050043#include <linux/mutex.h>
Akinobu Mita1f118bc2012-11-08 16:12:22 -080044#include <linux/bitmap.h>
Akinobu Mitad48c1522012-11-08 16:12:23 -080045#include <linux/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#include <asm/uaccess.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070047
mike.miller@hp.comeb0df992005-06-10 14:51:04 -050048#include <linux/dma-mapping.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070049#include <linux/blkdev.h>
50#include <linux/genhd.h>
51#include <linux/completion.h>
Stephen Camerond5d3b732007-05-08 00:30:02 -070052#include <scsi/scsi.h>
Mike Miller (OS Dev)03bbfee2007-05-08 00:29:32 -070053#include <scsi/sg.h>
54#include <scsi/scsi_ioctl.h>
55#include <linux/cdrom.h>
Mike Pagano231bc2a2008-04-10 21:29:26 -070056#include <linux/scatterlist.h>
Mike Miller0a9279c2009-04-02 12:50:55 -070057#include <linux/kthread.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
59#define CCISS_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin))
Mike Miller841fdff2010-06-02 12:58:09 -070060#define DRIVER_NAME "HP CISS Driver (v 3.6.26)"
61#define DRIVER_VERSION CCISS_DRIVER_VERSION(3, 6, 26)
Linus Torvalds1da177e2005-04-16 15:20:36 -070062
63/* Embedded module documentation macros - see modules.h */
64MODULE_AUTHOR("Hewlett-Packard Company");
Mike Miller24aac482008-06-12 15:21:34 -070065MODULE_DESCRIPTION("Driver for HP Smart Array Controllers");
Mike Miller841fdff2010-06-02 12:58:09 -070066MODULE_SUPPORTED_DEVICE("HP Smart Array Controllers");
67MODULE_VERSION("3.6.26");
Linus Torvalds1da177e2005-04-16 15:20:36 -070068MODULE_LICENSE("GPL");
Stephen M. Cameron8a4ec672011-05-03 14:54:12 -050069static int cciss_tape_cmds = 6;
70module_param(cciss_tape_cmds, int, 0644);
71MODULE_PARM_DESC(cciss_tape_cmds,
72 "number of commands to allocate for tape devices (default: 6)");
Joseph Handzik13049532011-08-08 11:40:15 +020073static int cciss_simple_mode;
74module_param(cciss_simple_mode, int, S_IRUGO|S_IWUSR);
75MODULE_PARM_DESC(cciss_simple_mode,
76 "Use 'simple mode' rather than 'performant mode'");
Linus Torvalds1da177e2005-04-16 15:20:36 -070077
Mike Millere4292e052013-04-29 11:55:53 -070078static int cciss_allow_hpsa;
79module_param(cciss_allow_hpsa, int, S_IRUGO|S_IWUSR);
80MODULE_PARM_DESC(cciss_allow_hpsa,
81 "Prevent cciss driver from accessing hardware known to be "
82 " supported by the hpsa driver");
83
Arnd Bergmann2a48fc02010-06-02 14:28:52 +020084static DEFINE_MUTEX(cciss_mutex);
Jens Axboebbe425c2010-11-17 11:56:13 +010085static struct proc_dir_entry *proc_cciss;
Stephen M. Cameron2ec24ff2009-10-13 09:18:22 +020086
Linus Torvalds1da177e2005-04-16 15:20:36 -070087#include "cciss_cmd.h"
88#include "cciss.h"
89#include <linux/cciss_ioctl.h>
90
91/* define the PCI info for the cards we can control */
92static const struct pci_device_id cciss_pci_device_id[] = {
Bjorn Helgaasf82ccdb2006-06-25 05:49:07 -070093 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISS, 0x0E11, 0x4070},
94 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4080},
95 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4082},
96 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4083},
97 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x4091},
98 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409A},
99 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409B},
100 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409C},
101 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409D},
102 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSA, 0x103C, 0x3225},
103 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3223},
104 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3234},
105 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3235},
106 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3211},
107 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3212},
108 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3213},
109 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3214},
110 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3215},
Mike Millerde923912006-12-06 20:35:03 -0800111 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3237},
Mike Miller (OS Dev9cff3b32007-06-19 20:52:18 +0200112 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x323D},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113 {0,}
114};
Bjorn Helgaas7c832832006-06-25 05:49:06 -0700115
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116MODULE_DEVICE_TABLE(pci, cciss_pci_device_id);
117
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118/* board_id = Subsystem Device ID & Vendor ID
119 * product = Marketing Name for the board
Bjorn Helgaas7c832832006-06-25 05:49:06 -0700120 * access = Address of the struct of function pointers
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121 */
122static struct board_type products[] = {
Mike Miller49153992008-07-04 10:00:02 -0700123 {0x40700E11, "Smart Array 5300", &SA5_access},
124 {0x40800E11, "Smart Array 5i", &SA5B_access},
125 {0x40820E11, "Smart Array 532", &SA5B_access},
126 {0x40830E11, "Smart Array 5312", &SA5B_access},
127 {0x409A0E11, "Smart Array 641", &SA5_access},
128 {0x409B0E11, "Smart Array 642", &SA5_access},
129 {0x409C0E11, "Smart Array 6400", &SA5_access},
130 {0x409D0E11, "Smart Array 6400 EM", &SA5_access},
131 {0x40910E11, "Smart Array 6i", &SA5_access},
132 {0x3225103C, "Smart Array P600", &SA5_access},
Stephen M. Cameron4205df32010-10-23 18:47:31 +0200133 {0x3223103C, "Smart Array P800", &SA5_access},
134 {0x3234103C, "Smart Array P400", &SA5_access},
Mike Miller49153992008-07-04 10:00:02 -0700135 {0x3235103C, "Smart Array P400i", &SA5_access},
136 {0x3211103C, "Smart Array E200i", &SA5_access},
137 {0x3212103C, "Smart Array E200", &SA5_access},
138 {0x3213103C, "Smart Array E200i", &SA5_access},
139 {0x3214103C, "Smart Array E200i", &SA5_access},
140 {0x3215103C, "Smart Array E200i", &SA5_access},
141 {0x3237103C, "Smart Array E500", &SA5_access},
Stephen M. Cameron2ec24ff2009-10-13 09:18:22 +0200142 {0x3223103C, "Smart Array P800", &SA5_access},
143 {0x3234103C, "Smart Array P400", &SA5_access},
Mike Miller49153992008-07-04 10:00:02 -0700144 {0x323D103C, "Smart Array P700m", &SA5_access},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145};
146
Bjorn Helgaasd14c4ab2006-06-25 05:49:04 -0700147/* How long to wait (in milliseconds) for board to go into simple mode */
Bjorn Helgaas7c832832006-06-25 05:49:06 -0700148#define MAX_CONFIG_WAIT 30000
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149#define MAX_IOCTL_CONFIG_WAIT 1000
150
151/*define how many times we will try a command because of bus resets */
152#define MAX_CMD_RETRIES 3
153
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154#define MAX_CTLR 32
155
156/* Originally cciss driver only supports 8 major numbers */
157#define MAX_CTLR_ORIG 8
158
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159static ctlr_info_t *hba[MAX_CTLR];
160
Andrew Pattersonb368c9d2009-09-17 13:46:58 -0500161static struct task_struct *cciss_scan_thread;
162static DEFINE_MUTEX(scan_mutex);
163static LIST_HEAD(scan_q);
164
Jens Axboe165125e2007-07-24 09:28:11 +0200165static void do_cciss_request(struct request_queue *q);
Mike Miller0c2b3902010-06-02 12:58:00 -0700166static irqreturn_t do_cciss_intx(int irq, void *dev_id);
167static irqreturn_t do_cciss_msix_intr(int irq, void *dev_id);
Al Viroef7822c2008-03-02 09:26:41 -0500168static int cciss_open(struct block_device *bdev, fmode_t mode);
Arnd Bergmann6e9624b2010-08-07 18:25:34 +0200169static int cciss_unlocked_open(struct block_device *bdev, fmode_t mode);
Al Virodb2a1442013-05-05 21:52:57 -0400170static void cciss_release(struct gendisk *disk, fmode_t mode);
Al Viroef7822c2008-03-02 09:26:41 -0500171static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
Bjorn Helgaas7c832832006-06-25 05:49:06 -0700172 unsigned int cmd, unsigned long arg);
Christoph Hellwiga885c8c2006-01-08 01:02:50 -0800173static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175static int cciss_revalidate(struct gendisk *disk);
Stephen M. Cameron2d11d992009-09-17 13:47:44 -0500176static int rebuild_lun_table(ctlr_info_t *h, int first_time, int via_ioctl);
Stephen M. Camerona0ea8622008-12-18 14:55:51 +0100177static int deregister_disk(ctlr_info_t *h, int drv_index,
Stephen M. Cameron2d11d992009-09-17 13:47:44 -0500178 int clear_all, int via_ioctl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179
Stephen M. Cameronf70dba82010-07-19 13:46:38 -0500180static void cciss_read_capacity(ctlr_info_t *h, int logvol,
Mike Miller (OS Dev)00988a32006-09-30 23:27:23 -0700181 sector_t *total_size, unsigned int *block_size);
Stephen M. Cameronf70dba82010-07-19 13:46:38 -0500182static void cciss_read_capacity_16(ctlr_info_t *h, int logvol,
Mike Miller (OS Dev)00988a32006-09-30 23:27:23 -0700183 sector_t *total_size, unsigned int *block_size);
Stephen M. Cameronf70dba82010-07-19 13:46:38 -0500184static void cciss_geometry_inquiry(ctlr_info_t *h, int logvol,
Stephen M. Cameron7b838bd2009-11-12 12:49:30 -0600185 sector_t total_size,
Mike Miller (OS Dev)00988a32006-09-30 23:27:23 -0700186 unsigned int block_size, InquiryData_struct *inq_buff,
Bjorn Helgaas7c832832006-06-25 05:49:06 -0700187 drive_info_struct *drv);
Greg Kroah-Hartman8d85fce2012-12-21 15:13:49 -0800188static void cciss_interrupt_mode(ctlr_info_t *);
189static int cciss_enter_simple_mode(struct ctlr_info *h);
Bjorn Helgaas7c832832006-06-25 05:49:06 -0700190static void start_io(ctlr_info_t *h);
Stephen M. Cameronf70dba82010-07-19 13:46:38 -0500191static int sendcmd_withirq(ctlr_info_t *h, __u8 cmd, void *buff, size_t size,
scameron@beardog.cca.cpqcorp.netb57695f2009-06-08 16:02:17 -0500192 __u8 page_code, unsigned char scsi3addr[],
193 int cmd_type);
scameron@beardog.cca.cpqcorp.net85cc61a2009-06-08 16:07:45 -0500194static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
195 int attempt_retry);
196static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197
Andrew Pattersond6f49652009-09-17 13:47:03 -0500198static int add_to_scan_list(struct ctlr_info *h);
Mike Miller0a9279c2009-04-02 12:50:55 -0700199static int scan_thread(void *data);
200static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c);
Stephen M. Cameron617e1342009-09-17 13:47:14 -0500201static void cciss_hba_release(struct device *dev);
202static void cciss_device_release(struct device *dev);
Stephen M. Cameron361e9b02009-09-17 13:47:29 -0500203static void cciss_free_gendisk(ctlr_info_t *h, int drv_index);
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -0500204static void cciss_free_drive_info(ctlr_info_t *h, int drv_index);
Mike Miller29979a72010-06-11 13:13:35 +0200205static inline u32 next_command(ctlr_info_t *h);
Greg Kroah-Hartman8d85fce2012-12-21 15:13:49 -0800206static int cciss_find_cfg_addrs(struct pci_dev *pdev, void __iomem *vaddr,
207 u32 *cfg_base_addr, u64 *cfg_base_addr_index,
208 u64 *cfg_offset);
209static int cciss_pci_find_memory_BAR(struct pci_dev *pdev,
210 unsigned long *memory_bar);
Stephen M. Cameron16011132011-03-12 10:02:21 +0100211static inline u32 cciss_tag_discard_error_bits(ctlr_info_t *h, u32 tag);
Greg Kroah-Hartman8d85fce2012-12-21 15:13:49 -0800212static int write_driver_ver_to_cfgtable(CfgTable_struct __iomem *cfgtable);
Mike Miller33079b22005-09-13 01:25:22 -0700213
Mike Miller5e216152010-06-02 12:58:06 -0700214/* performant mode helper functions */
215static void calc_bucket_map(int *bucket, int num_buckets, int nsgs,
216 int *bucket_map);
217static void cciss_put_controller_into_performant_mode(ctlr_info_t *h);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218
219#ifdef CONFIG_PROC_FS
Stephen M. Cameronf70dba82010-07-19 13:46:38 -0500220static void cciss_procinit(ctlr_info_t *h);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221#else
Stephen M. Cameronf70dba82010-07-19 13:46:38 -0500222static void cciss_procinit(ctlr_info_t *h)
Bjorn Helgaas7c832832006-06-25 05:49:06 -0700223{
224}
225#endif /* CONFIG_PROC_FS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226
227#ifdef CONFIG_COMPAT
Al Viroef7822c2008-03-02 09:26:41 -0500228static int cciss_compat_ioctl(struct block_device *, fmode_t,
229 unsigned, unsigned long);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230#endif
231
Alexey Dobriyan83d5cde2009-09-21 17:01:13 -0700232static const struct block_device_operations cciss_fops = {
Bjorn Helgaas7c832832006-06-25 05:49:06 -0700233 .owner = THIS_MODULE,
Arnd Bergmann6e9624b2010-08-07 18:25:34 +0200234 .open = cciss_unlocked_open,
Al Viroef7822c2008-03-02 09:26:41 -0500235 .release = cciss_release,
Stephen M. Cameron03f47e82013-06-12 14:04:47 -0700236 .ioctl = cciss_ioctl,
Bjorn Helgaas7c832832006-06-25 05:49:06 -0700237 .getgeo = cciss_getgeo,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238#ifdef CONFIG_COMPAT
Al Viroef7822c2008-03-02 09:26:41 -0500239 .compat_ioctl = cciss_compat_ioctl,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240#endif
Bjorn Helgaas7c832832006-06-25 05:49:06 -0700241 .revalidate_disk = cciss_revalidate,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242};
243
Mike Miller5e216152010-06-02 12:58:06 -0700244/* set_performant_mode: Modify the tag for cciss performant
245 * set bit 0 for pull model, bits 3-1 for block fetch
246 * register number
247 */
248static void set_performant_mode(ctlr_info_t *h, CommandList_struct *c)
249{
Stephen M. Cameron0498cc22011-03-12 10:02:16 +0100250 if (likely(h->transMethod & CFGTBL_Trans_Performant))
Mike Miller5e216152010-06-02 12:58:06 -0700251 c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1);
252}
253
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254/*
255 * Enqueuing and dequeuing functions for cmdlists.
256 */
Jens Axboee6e1ee92011-01-10 21:50:33 +0100257static inline void addQ(struct list_head *list, CommandList_struct *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258{
Jens Axboee6e1ee92011-01-10 21:50:33 +0100259 list_add_tail(&c->list, list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260}
261
Jens Axboe8a3173d2008-11-20 09:46:09 +0100262static inline void removeQ(CommandList_struct *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263{
Hannes Reineckeb59e64d2009-07-02 22:02:06 +0200264 /*
265 * After kexec/dump some commands might still
266 * be in flight, which the firmware will try
267 * to complete. Resetting the firmware doesn't work
268 * with old fw revisions, so we have to mark
269 * them off as 'stale' to prevent the driver from
270 * falling over.
271 */
Jens Axboee6e1ee92011-01-10 21:50:33 +0100272 if (WARN_ON(list_empty(&c->list))) {
Hannes Reineckeb59e64d2009-07-02 22:02:06 +0200273 c->cmd_type = CMD_MSG_STALE;
Jens Axboe8a3173d2008-11-20 09:46:09 +0100274 return;
Hannes Reineckeb59e64d2009-07-02 22:02:06 +0200275 }
Jens Axboe8a3173d2008-11-20 09:46:09 +0100276
Jens Axboee6e1ee92011-01-10 21:50:33 +0100277 list_del_init(&c->list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278}
279
Mike Miller664a7172010-06-02 12:57:58 -0700280static void enqueue_cmd_and_start_io(ctlr_info_t *h,
281 CommandList_struct *c)
282{
283 unsigned long flags;
Mike Miller5e216152010-06-02 12:58:06 -0700284 set_performant_mode(h, c);
Mike Miller664a7172010-06-02 12:57:58 -0700285 spin_lock_irqsave(&h->lock, flags);
286 addQ(&h->reqQ, c);
287 h->Qdepth++;
Stephen M. Cameron2a643ec2010-08-25 19:58:53 +0200288 if (h->Qdepth > h->maxQsinceinit)
289 h->maxQsinceinit = h->Qdepth;
Mike Miller664a7172010-06-02 12:57:58 -0700290 start_io(h);
291 spin_unlock_irqrestore(&h->lock, flags);
292}
293
Stephen M. Camerondccc9b52010-02-26 16:01:27 -0600294static void cciss_free_sg_chain_blocks(SGDescriptor_struct **cmd_sg_list,
Stephen M. Cameron49fc5602010-02-26 16:01:22 -0600295 int nr_cmds)
296{
297 int i;
298
299 if (!cmd_sg_list)
300 return;
301 for (i = 0; i < nr_cmds; i++) {
Stephen M. Camerondccc9b52010-02-26 16:01:27 -0600302 kfree(cmd_sg_list[i]);
303 cmd_sg_list[i] = NULL;
Stephen M. Cameron49fc5602010-02-26 16:01:22 -0600304 }
305 kfree(cmd_sg_list);
306}
307
Stephen M. Camerondccc9b52010-02-26 16:01:27 -0600308static SGDescriptor_struct **cciss_allocate_sg_chain_blocks(
309 ctlr_info_t *h, int chainsize, int nr_cmds)
Stephen M. Cameron49fc5602010-02-26 16:01:22 -0600310{
311 int j;
Stephen M. Camerondccc9b52010-02-26 16:01:27 -0600312 SGDescriptor_struct **cmd_sg_list;
Stephen M. Cameron49fc5602010-02-26 16:01:22 -0600313
314 if (chainsize <= 0)
315 return NULL;
316
317 cmd_sg_list = kmalloc(sizeof(*cmd_sg_list) * nr_cmds, GFP_KERNEL);
318 if (!cmd_sg_list)
319 return NULL;
320
321 /* Build up chain blocks for each command */
322 for (j = 0; j < nr_cmds; j++) {
Stephen M. Cameron49fc5602010-02-26 16:01:22 -0600323 /* Need a block of chainsized s/g elements. */
Stephen M. Camerondccc9b52010-02-26 16:01:27 -0600324 cmd_sg_list[j] = kmalloc((chainsize *
325 sizeof(*cmd_sg_list[j])), GFP_KERNEL);
326 if (!cmd_sg_list[j]) {
Stephen M. Cameron49fc5602010-02-26 16:01:22 -0600327 dev_err(&h->pdev->dev, "Cannot get memory "
328 "for s/g chains.\n");
329 goto clean;
330 }
331 }
332 return cmd_sg_list;
333clean:
334 cciss_free_sg_chain_blocks(cmd_sg_list, nr_cmds);
335 return NULL;
336}
337
Stephen M. Camerond45033e2010-02-26 16:01:37 -0600338static void cciss_unmap_sg_chain_block(ctlr_info_t *h, CommandList_struct *c)
339{
340 SGDescriptor_struct *chain_sg;
341 u64bit temp64;
342
343 if (c->Header.SGTotal <= h->max_cmd_sgentries)
344 return;
345
346 chain_sg = &c->SG[h->max_cmd_sgentries - 1];
347 temp64.val32.lower = chain_sg->Addr.lower;
348 temp64.val32.upper = chain_sg->Addr.upper;
349 pci_unmap_single(h->pdev, temp64.val, chain_sg->Len, PCI_DMA_TODEVICE);
350}
351
352static void cciss_map_sg_chain_block(ctlr_info_t *h, CommandList_struct *c,
353 SGDescriptor_struct *chain_block, int len)
354{
355 SGDescriptor_struct *chain_sg;
356 u64bit temp64;
357
358 chain_sg = &c->SG[h->max_cmd_sgentries - 1];
359 chain_sg->Ext = CCISS_SG_CHAIN;
360 chain_sg->Len = len;
361 temp64.val = pci_map_single(h->pdev, chain_block, len,
362 PCI_DMA_TODEVICE);
363 chain_sg->Addr.lower = temp64.val32.lower;
364 chain_sg->Addr.upper = temp64.val32.upper;
365}
366
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367#include "cciss_scsi.c" /* For SCSI tape support */
368
Alexander Beregalov1e6f2dc2009-09-24 16:15:38 +0200369static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
370 "UNKNOWN"
371};
Kulikov Vasiliy0e4a9d02010-06-28 15:54:44 +0400372#define RAID_UNKNOWN (ARRAY_SIZE(raid_label)-1)
Randy Dunlap0f5486e2006-12-29 16:48:31 -0800373
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374#ifdef CONFIG_PROC_FS
375
376/*
377 * Report information about this controller.
378 */
379#define ENG_GIG 1000000000
380#define ENG_GIG_FACTOR (ENG_GIG/512)
Mike Miller89b6e742008-02-21 08:54:03 +0100381#define ENGAGE_SCSI "engage scsi"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382
Mike Miller89b6e742008-02-21 08:54:03 +0100383static void cciss_seq_show_header(struct seq_file *seq)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384{
Mike Miller89b6e742008-02-21 08:54:03 +0100385 ctlr_info_t *h = seq->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386
Mike Miller89b6e742008-02-21 08:54:03 +0100387 seq_printf(seq, "%s: HP %s Controller\n"
388 "Board ID: 0x%08lx\n"
389 "Firmware Version: %c%c%c%c\n"
390 "IRQ: %d\n"
391 "Logical drives: %d\n"
392 "Current Q depth: %d\n"
393 "Current # commands on controller: %d\n"
394 "Max Q depth since init: %d\n"
395 "Max # commands on controller since init: %d\n"
396 "Max SG entries since init: %d\n",
397 h->devname,
398 h->product_name,
399 (unsigned long)h->board_id,
400 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2],
Joseph Handzik13049532011-08-08 11:40:15 +0200401 h->firm_ver[3], (unsigned int)h->intr[h->intr_mode],
Mike Miller89b6e742008-02-21 08:54:03 +0100402 h->num_luns,
403 h->Qdepth, h->commands_outstanding,
404 h->maxQsinceinit, h->max_outstanding, h->maxSG);
405
406#ifdef CONFIG_CISS_SCSI_TAPE
Stephen M. Cameronf70dba82010-07-19 13:46:38 -0500407 cciss_seq_tape_report(seq, h);
Mike Miller89b6e742008-02-21 08:54:03 +0100408#endif /* CONFIG_CISS_SCSI_TAPE */
409}
410
411static void *cciss_seq_start(struct seq_file *seq, loff_t *pos)
412{
413 ctlr_info_t *h = seq->private;
Mike Miller89b6e742008-02-21 08:54:03 +0100414 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415
416 /* prevent displaying bogus info during configuration
417 * or deconfiguration of a logical volume
418 */
Stephen M. Cameronf70dba82010-07-19 13:46:38 -0500419 spin_lock_irqsave(&h->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 if (h->busy_configuring) {
Stephen M. Cameronf70dba82010-07-19 13:46:38 -0500421 spin_unlock_irqrestore(&h->lock, flags);
Mike Miller89b6e742008-02-21 08:54:03 +0100422 return ERR_PTR(-EBUSY);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 }
424 h->busy_configuring = 1;
Stephen M. Cameronf70dba82010-07-19 13:46:38 -0500425 spin_unlock_irqrestore(&h->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426
Mike Miller89b6e742008-02-21 08:54:03 +0100427 if (*pos == 0)
428 cciss_seq_show_header(seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429
Mike Miller89b6e742008-02-21 08:54:03 +0100430 return pos;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431}
432
Mike Miller89b6e742008-02-21 08:54:03 +0100433static int cciss_seq_show(struct seq_file *seq, void *v)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434{
Mike Miller89b6e742008-02-21 08:54:03 +0100435 sector_t vol_sz, vol_sz_frac;
436 ctlr_info_t *h = seq->private;
437 unsigned ctlr = h->ctlr;
438 loff_t *pos = v;
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -0500439 drive_info_struct *drv = h->drv[*pos];
Mike Miller89b6e742008-02-21 08:54:03 +0100440
441 if (*pos > h->highest_lun)
442 return 0;
443
Stephen M. Cameron531c2dc2010-02-05 13:14:04 +0100444 if (drv == NULL) /* it's possible for h->drv[] to have holes. */
445 return 0;
446
Mike Miller89b6e742008-02-21 08:54:03 +0100447 if (drv->heads == 0)
448 return 0;
449
450 vol_sz = drv->nr_blocks;
451 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR);
452 vol_sz_frac *= 100;
453 sector_div(vol_sz_frac, ENG_GIG_FACTOR);
454
Stephen M. Cameronfa52bec2009-09-17 13:48:15 -0500455 if (drv->raid_level < 0 || drv->raid_level > RAID_UNKNOWN)
Mike Miller89b6e742008-02-21 08:54:03 +0100456 drv->raid_level = RAID_UNKNOWN;
457 seq_printf(seq, "cciss/c%dd%d:"
458 "\t%4u.%02uGB\tRAID %s\n",
459 ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac,
460 raid_label[drv->raid_level]);
461 return 0;
462}
463
464static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos)
465{
466 ctlr_info_t *h = seq->private;
467
468 if (*pos > h->highest_lun)
469 return NULL;
470 *pos += 1;
471
472 return pos;
473}
474
475static void cciss_seq_stop(struct seq_file *seq, void *v)
476{
477 ctlr_info_t *h = seq->private;
478
479 /* Only reset h->busy_configuring if we succeeded in setting
480 * it during cciss_seq_start. */
481 if (v == ERR_PTR(-EBUSY))
482 return;
483
484 h->busy_configuring = 0;
485}
486
James Morris88e9d342009-09-22 16:43:43 -0700487static const struct seq_operations cciss_seq_ops = {
Mike Miller89b6e742008-02-21 08:54:03 +0100488 .start = cciss_seq_start,
489 .show = cciss_seq_show,
490 .next = cciss_seq_next,
491 .stop = cciss_seq_stop,
492};
493
494static int cciss_seq_open(struct inode *inode, struct file *file)
495{
496 int ret = seq_open(file, &cciss_seq_ops);
497 struct seq_file *seq = file->private_data;
498
499 if (!ret)
Al Virod9dda782013-03-31 18:16:14 -0400500 seq->private = PDE_DATA(inode);
Mike Miller89b6e742008-02-21 08:54:03 +0100501
502 return ret;
503}
504
505static ssize_t
506cciss_proc_write(struct file *file, const char __user *buf,
507 size_t length, loff_t *ppos)
508{
509 int err;
510 char *buffer;
511
512#ifndef CONFIG_CISS_SCSI_TAPE
513 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514#endif
515
Mike Miller89b6e742008-02-21 08:54:03 +0100516 if (!buf || length > PAGE_SIZE - 1)
Bjorn Helgaas7c832832006-06-25 05:49:06 -0700517 return -EINVAL;
Mike Miller89b6e742008-02-21 08:54:03 +0100518
519 buffer = (char *)__get_free_page(GFP_KERNEL);
520 if (!buffer)
521 return -ENOMEM;
522
523 err = -EFAULT;
524 if (copy_from_user(buffer, buf, length))
525 goto out;
526 buffer[length] = '\0';
527
528#ifdef CONFIG_CISS_SCSI_TAPE
529 if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) {
530 struct seq_file *seq = file->private_data;
531 ctlr_info_t *h = seq->private;
Mike Miller89b6e742008-02-21 08:54:03 +0100532
Stephen M. Cameronf70dba82010-07-19 13:46:38 -0500533 err = cciss_engage_scsi(h);
Stephen M. Cameron8721c812009-11-12 12:50:06 -0600534 if (err == 0)
Mike Miller89b6e742008-02-21 08:54:03 +0100535 err = length;
536 } else
537#endif /* CONFIG_CISS_SCSI_TAPE */
538 err = -EINVAL;
Bjorn Helgaas7c832832006-06-25 05:49:06 -0700539 /* might be nice to have "disengage" too, but it's not
540 safely possible. (only 1 module use count, lock issues.) */
Mike Miller89b6e742008-02-21 08:54:03 +0100541
542out:
543 free_page((unsigned long)buffer);
544 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545}
546
Alexey Dobriyan828c0952009-10-01 15:43:56 -0700547static const struct file_operations cciss_proc_fops = {
Mike Miller89b6e742008-02-21 08:54:03 +0100548 .owner = THIS_MODULE,
549 .open = cciss_seq_open,
550 .read = seq_read,
551 .llseek = seq_lseek,
552 .release = seq_release,
553 .write = cciss_proc_write,
554};
555
Greg Kroah-Hartman8d85fce2012-12-21 15:13:49 -0800556static void cciss_procinit(ctlr_info_t *h)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557{
558 struct proc_dir_entry *pde;
559
Mike Miller89b6e742008-02-21 08:54:03 +0100560 if (proc_cciss == NULL)
Alexey Dobriyan928b4d82008-04-29 01:01:44 -0700561 proc_cciss = proc_mkdir("driver/cciss", NULL);
Mike Miller89b6e742008-02-21 08:54:03 +0100562 if (!proc_cciss)
563 return;
Stephen M. Cameronf70dba82010-07-19 13:46:38 -0500564 pde = proc_create_data(h->devname, S_IWUSR | S_IRUSR | S_IRGRP |
Mike Miller89b6e742008-02-21 08:54:03 +0100565 S_IROTH, proc_cciss,
Stephen M. Cameronf70dba82010-07-19 13:46:38 -0500566 &cciss_proc_fops, h);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567}
Bjorn Helgaas7c832832006-06-25 05:49:06 -0700568#endif /* CONFIG_PROC_FS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569
Andrew Patterson7fe06322009-06-02 14:48:39 +0200570#define MAX_PRODUCT_NAME_LEN 19
571
572#define to_hba(n) container_of(n, struct ctlr_info, dev)
573#define to_drv(n) container_of(n, drive_info_struct, dev)
574
Stephen M. Cameronec52d5f2011-05-03 14:54:02 -0500575/* List of controllers which cannot be hard reset on kexec with reset_devices */
Stephen M. Cameron957c2ec2011-03-11 20:06:09 +0100576static u32 unresettable_controller[] = {
577 0x324a103C, /* Smart Array P712m */
578 0x324b103C, /* SmartArray P711m */
579 0x3223103C, /* Smart Array P800 */
580 0x3234103C, /* Smart Array P400 */
581 0x3235103C, /* Smart Array P400i */
582 0x3211103C, /* Smart Array E200i */
583 0x3212103C, /* Smart Array E200 */
584 0x3213103C, /* Smart Array E200i */
585 0x3214103C, /* Smart Array E200i */
586 0x3215103C, /* Smart Array E200i */
587 0x3237103C, /* Smart Array E500 */
588 0x323D103C, /* Smart Array P700m */
589 0x409C0E11, /* Smart Array 6400 */
590 0x409D0E11, /* Smart Array 6400 EM */
591};
592
Stephen M. Cameronec52d5f2011-05-03 14:54:02 -0500593/* List of controllers which cannot even be soft reset */
594static u32 soft_unresettable_controller[] = {
595 0x409C0E11, /* Smart Array 6400 */
596 0x409D0E11, /* Smart Array 6400 EM */
597};
598
599static int ctlr_is_hard_resettable(u32 board_id)
Stephen M. Cameron957c2ec2011-03-11 20:06:09 +0100600{
601 int i;
602
603 for (i = 0; i < ARRAY_SIZE(unresettable_controller); i++)
Stephen M. Cameronec52d5f2011-05-03 14:54:02 -0500604 if (unresettable_controller[i] == board_id)
Stephen M. Cameron957c2ec2011-03-11 20:06:09 +0100605 return 0;
606 return 1;
607}
608
Stephen M. Cameronec52d5f2011-05-03 14:54:02 -0500609static int ctlr_is_soft_resettable(u32 board_id)
610{
611 int i;
612
613 for (i = 0; i < ARRAY_SIZE(soft_unresettable_controller); i++)
614 if (soft_unresettable_controller[i] == board_id)
615 return 0;
616 return 1;
617}
618
619static int ctlr_is_resettable(u32 board_id)
620{
621 return ctlr_is_hard_resettable(board_id) ||
622 ctlr_is_soft_resettable(board_id);
623}
624
Stephen M. Cameron957c2ec2011-03-11 20:06:09 +0100625static ssize_t host_show_resettable(struct device *dev,
626 struct device_attribute *attr,
627 char *buf)
628{
629 struct ctlr_info *h = to_hba(dev);
630
Stephen M. Cameronec52d5f2011-05-03 14:54:02 -0500631 return snprintf(buf, 20, "%d\n", ctlr_is_resettable(h->board_id));
Stephen M. Cameron957c2ec2011-03-11 20:06:09 +0100632}
633static DEVICE_ATTR(resettable, S_IRUGO, host_show_resettable, NULL);
634
Andrew Pattersond6f49652009-09-17 13:47:03 -0500635static ssize_t host_store_rescan(struct device *dev,
636 struct device_attribute *attr,
637 const char *buf, size_t count)
638{
639 struct ctlr_info *h = to_hba(dev);
640
641 add_to_scan_list(h);
642 wake_up_process(cciss_scan_thread);
643 wait_for_completion_interruptible(&h->scan_wait);
644
645 return count;
646}
Alex Chiang8ba95c62009-11-12 12:49:14 -0600647static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
Andrew Patterson7fe06322009-06-02 14:48:39 +0200648
Joe Handzikf963d272011-08-08 11:40:17 +0200649static ssize_t host_show_transport_mode(struct device *dev,
650 struct device_attribute *attr,
651 char *buf)
652{
653 struct ctlr_info *h = to_hba(dev);
654
655 return snprintf(buf, 20, "%s\n",
656 h->transMethod & CFGTBL_Trans_Performant ?
657 "performant" : "simple");
658}
659static DEVICE_ATTR(transport_mode, S_IRUGO, host_show_transport_mode, NULL);
660
Andrew Patterson7fe06322009-06-02 14:48:39 +0200661static ssize_t dev_show_unique_id(struct device *dev,
662 struct device_attribute *attr,
663 char *buf)
664{
665 drive_info_struct *drv = to_drv(dev);
666 struct ctlr_info *h = to_hba(drv->dev.parent);
667 __u8 sn[16];
668 unsigned long flags;
669 int ret = 0;
670
Stephen M. Cameronf70dba82010-07-19 13:46:38 -0500671 spin_lock_irqsave(&h->lock, flags);
Andrew Patterson7fe06322009-06-02 14:48:39 +0200672 if (h->busy_configuring)
673 ret = -EBUSY;
674 else
675 memcpy(sn, drv->serial_no, sizeof(sn));
Stephen M. Cameronf70dba82010-07-19 13:46:38 -0500676 spin_unlock_irqrestore(&h->lock, flags);
Andrew Patterson7fe06322009-06-02 14:48:39 +0200677
678 if (ret)
679 return ret;
680 else
681 return snprintf(buf, 16 * 2 + 2,
682 "%02X%02X%02X%02X%02X%02X%02X%02X"
683 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
684 sn[0], sn[1], sn[2], sn[3],
685 sn[4], sn[5], sn[6], sn[7],
686 sn[8], sn[9], sn[10], sn[11],
687 sn[12], sn[13], sn[14], sn[15]);
688}
Alex Chiang8ba95c62009-11-12 12:49:14 -0600689static DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL);
Andrew Patterson7fe06322009-06-02 14:48:39 +0200690
691static ssize_t dev_show_vendor(struct device *dev,
692 struct device_attribute *attr,
693 char *buf)
694{
695 drive_info_struct *drv = to_drv(dev);
696 struct ctlr_info *h = to_hba(drv->dev.parent);
697 char vendor[VENDOR_LEN + 1];
698 unsigned long flags;
699 int ret = 0;
700
Stephen M. Cameronf70dba82010-07-19 13:46:38 -0500701 spin_lock_irqsave(&h->lock, flags);
Andrew Patterson7fe06322009-06-02 14:48:39 +0200702 if (h->busy_configuring)
703 ret = -EBUSY;
704 else
705 memcpy(vendor, drv->vendor, VENDOR_LEN + 1);
Stephen M. Cameronf70dba82010-07-19 13:46:38 -0500706 spin_unlock_irqrestore(&h->lock, flags);
Andrew Patterson7fe06322009-06-02 14:48:39 +0200707
708 if (ret)
709 return ret;
710 else
711 return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor);
712}
Alex Chiang8ba95c62009-11-12 12:49:14 -0600713static DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL);
Andrew Patterson7fe06322009-06-02 14:48:39 +0200714
715static ssize_t dev_show_model(struct device *dev,
716 struct device_attribute *attr,
717 char *buf)
718{
719 drive_info_struct *drv = to_drv(dev);
720 struct ctlr_info *h = to_hba(drv->dev.parent);
721 char model[MODEL_LEN + 1];
722 unsigned long flags;
723 int ret = 0;
724
Stephen M. Cameronf70dba82010-07-19 13:46:38 -0500725 spin_lock_irqsave(&h->lock, flags);
Andrew Patterson7fe06322009-06-02 14:48:39 +0200726 if (h->busy_configuring)
727 ret = -EBUSY;
728 else
729 memcpy(model, drv->model, MODEL_LEN + 1);
Stephen M. Cameronf70dba82010-07-19 13:46:38 -0500730 spin_unlock_irqrestore(&h->lock, flags);
Andrew Patterson7fe06322009-06-02 14:48:39 +0200731
732 if (ret)
733 return ret;
734 else
735 return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model);
736}
Alex Chiang8ba95c62009-11-12 12:49:14 -0600737static DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL);
Andrew Patterson7fe06322009-06-02 14:48:39 +0200738
739static ssize_t dev_show_rev(struct device *dev,
740 struct device_attribute *attr,
741 char *buf)
742{
743 drive_info_struct *drv = to_drv(dev);
744 struct ctlr_info *h = to_hba(drv->dev.parent);
745 char rev[REV_LEN + 1];
746 unsigned long flags;
747 int ret = 0;
748
Stephen M. Cameronf70dba82010-07-19 13:46:38 -0500749 spin_lock_irqsave(&h->lock, flags);
Andrew Patterson7fe06322009-06-02 14:48:39 +0200750 if (h->busy_configuring)
751 ret = -EBUSY;
752 else
753 memcpy(rev, drv->rev, REV_LEN + 1);
Stephen M. Cameronf70dba82010-07-19 13:46:38 -0500754 spin_unlock_irqrestore(&h->lock, flags);
Andrew Patterson7fe06322009-06-02 14:48:39 +0200755
756 if (ret)
757 return ret;
758 else
759 return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev);
760}
Alex Chiang8ba95c62009-11-12 12:49:14 -0600761static DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL);
Andrew Patterson7fe06322009-06-02 14:48:39 +0200762
Stephen M. Cameronce84a8a2009-09-17 13:48:10 -0500763static ssize_t cciss_show_lunid(struct device *dev,
764 struct device_attribute *attr, char *buf)
765{
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -0500766 drive_info_struct *drv = to_drv(dev);
767 struct ctlr_info *h = to_hba(drv->dev.parent);
Stephen M. Cameronce84a8a2009-09-17 13:48:10 -0500768 unsigned long flags;
769 unsigned char lunid[8];
770
Stephen M. Cameronf70dba82010-07-19 13:46:38 -0500771 spin_lock_irqsave(&h->lock, flags);
Stephen M. Cameronce84a8a2009-09-17 13:48:10 -0500772 if (h->busy_configuring) {
Stephen M. Cameronf70dba82010-07-19 13:46:38 -0500773 spin_unlock_irqrestore(&h->lock, flags);
Stephen M. Cameronce84a8a2009-09-17 13:48:10 -0500774 return -EBUSY;
775 }
776 if (!drv->heads) {
Stephen M. Cameronf70dba82010-07-19 13:46:38 -0500777 spin_unlock_irqrestore(&h->lock, flags);
Stephen M. Cameronce84a8a2009-09-17 13:48:10 -0500778 return -ENOTTY;
779 }
780 memcpy(lunid, drv->LunID, sizeof(lunid));
Stephen M. Cameronf70dba82010-07-19 13:46:38 -0500781 spin_unlock_irqrestore(&h->lock, flags);
Stephen M. Cameronce84a8a2009-09-17 13:48:10 -0500782 return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
783 lunid[0], lunid[1], lunid[2], lunid[3],
784 lunid[4], lunid[5], lunid[6], lunid[7]);
785}
Alex Chiang8ba95c62009-11-12 12:49:14 -0600786static DEVICE_ATTR(lunid, S_IRUGO, cciss_show_lunid, NULL);
Stephen M. Cameronce84a8a2009-09-17 13:48:10 -0500787
Stephen M. Cameron3ff11112009-09-17 13:48:21 -0500788static ssize_t cciss_show_raid_level(struct device *dev,
789 struct device_attribute *attr, char *buf)
790{
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -0500791 drive_info_struct *drv = to_drv(dev);
792 struct ctlr_info *h = to_hba(drv->dev.parent);
Stephen M. Cameron3ff11112009-09-17 13:48:21 -0500793 int raid;
794 unsigned long flags;
795
Stephen M. Cameronf70dba82010-07-19 13:46:38 -0500796 spin_lock_irqsave(&h->lock, flags);
Stephen M. Cameron3ff11112009-09-17 13:48:21 -0500797 if (h->busy_configuring) {
Stephen M. Cameronf70dba82010-07-19 13:46:38 -0500798 spin_unlock_irqrestore(&h->lock, flags);
Stephen M. Cameron3ff11112009-09-17 13:48:21 -0500799 return -EBUSY;
800 }
801 raid = drv->raid_level;
Stephen M. Cameronf70dba82010-07-19 13:46:38 -0500802 spin_unlock_irqrestore(&h->lock, flags);
Stephen M. Cameron3ff11112009-09-17 13:48:21 -0500803 if (raid < 0 || raid > RAID_UNKNOWN)
804 raid = RAID_UNKNOWN;
805
806 return snprintf(buf, strlen(raid_label[raid]) + 7, "RAID %s\n",
807 raid_label[raid]);
808}
Alex Chiang8ba95c62009-11-12 12:49:14 -0600809static DEVICE_ATTR(raid_level, S_IRUGO, cciss_show_raid_level, NULL);
Stephen M. Cameron3ff11112009-09-17 13:48:21 -0500810
Stephen M. Camerone272afe2009-09-17 13:48:26 -0500811static ssize_t cciss_show_usage_count(struct device *dev,
812 struct device_attribute *attr, char *buf)
813{
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -0500814 drive_info_struct *drv = to_drv(dev);
815 struct ctlr_info *h = to_hba(drv->dev.parent);
Stephen M. Camerone272afe2009-09-17 13:48:26 -0500816 unsigned long flags;
817 int count;
818
Stephen M. Cameronf70dba82010-07-19 13:46:38 -0500819 spin_lock_irqsave(&h->lock, flags);
Stephen M. Camerone272afe2009-09-17 13:48:26 -0500820 if (h->busy_configuring) {
Stephen M. Cameronf70dba82010-07-19 13:46:38 -0500821 spin_unlock_irqrestore(&h->lock, flags);
Stephen M. Camerone272afe2009-09-17 13:48:26 -0500822 return -EBUSY;
823 }
824 count = drv->usage_count;
Stephen M. Cameronf70dba82010-07-19 13:46:38 -0500825 spin_unlock_irqrestore(&h->lock, flags);
Stephen M. Camerone272afe2009-09-17 13:48:26 -0500826 return snprintf(buf, 20, "%d\n", count);
827}
Alex Chiang8ba95c62009-11-12 12:49:14 -0600828static DEVICE_ATTR(usage_count, S_IRUGO, cciss_show_usage_count, NULL);
Stephen M. Camerone272afe2009-09-17 13:48:26 -0500829
Andrew Pattersond6f49652009-09-17 13:47:03 -0500830static struct attribute *cciss_host_attrs[] = {
831 &dev_attr_rescan.attr,
Stephen M. Cameron957c2ec2011-03-11 20:06:09 +0100832 &dev_attr_resettable.attr,
Joe Handzikf963d272011-08-08 11:40:17 +0200833 &dev_attr_transport_mode.attr,
Andrew Pattersond6f49652009-09-17 13:47:03 -0500834 NULL
835};
836
837static struct attribute_group cciss_host_attr_group = {
838 .attrs = cciss_host_attrs,
839};
840
Jens Axboe9f792d92009-09-18 22:24:21 +0200841static const struct attribute_group *cciss_host_attr_groups[] = {
Andrew Pattersond6f49652009-09-17 13:47:03 -0500842 &cciss_host_attr_group,
843 NULL
844};
845
846static struct device_type cciss_host_type = {
847 .name = "cciss_host",
848 .groups = cciss_host_attr_groups,
Stephen M. Cameron617e1342009-09-17 13:47:14 -0500849 .release = cciss_hba_release,
Andrew Pattersond6f49652009-09-17 13:47:03 -0500850};
851
Andrew Patterson7fe06322009-06-02 14:48:39 +0200852static struct attribute *cciss_dev_attrs[] = {
853 &dev_attr_unique_id.attr,
854 &dev_attr_model.attr,
855 &dev_attr_vendor.attr,
856 &dev_attr_rev.attr,
Stephen M. Cameronce84a8a2009-09-17 13:48:10 -0500857 &dev_attr_lunid.attr,
Stephen M. Cameron3ff11112009-09-17 13:48:21 -0500858 &dev_attr_raid_level.attr,
Stephen M. Camerone272afe2009-09-17 13:48:26 -0500859 &dev_attr_usage_count.attr,
Andrew Patterson7fe06322009-06-02 14:48:39 +0200860 NULL
861};
862
863static struct attribute_group cciss_dev_attr_group = {
864 .attrs = cciss_dev_attrs,
865};
866
David Brownella4dbd672009-06-24 10:06:31 -0700867static const struct attribute_group *cciss_dev_attr_groups[] = {
Andrew Patterson7fe06322009-06-02 14:48:39 +0200868 &cciss_dev_attr_group,
869 NULL
870};
871
872static struct device_type cciss_dev_type = {
873 .name = "cciss_device",
874 .groups = cciss_dev_attr_groups,
Stephen M. Cameron617e1342009-09-17 13:47:14 -0500875 .release = cciss_device_release,
Andrew Patterson7fe06322009-06-02 14:48:39 +0200876};
877
878static struct bus_type cciss_bus_type = {
879 .name = "cciss",
880};
881
Stephen M. Cameron617e1342009-09-17 13:47:14 -0500882/*
883 * cciss_hba_release is called when the reference count
884 * of h->dev goes to zero.
885 */
886static void cciss_hba_release(struct device *dev)
887{
888 /*
889 * nothing to do, but need this to avoid a warning
890 * about not having a release handler from lib/kref.c.
891 */
892}
Andrew Patterson7fe06322009-06-02 14:48:39 +0200893
894/*
895 * Initialize sysfs entry for each controller. This sets up and registers
896 * the 'cciss#' directory for each individual controller under
897 * /sys/bus/pci/devices/<dev>/.
898 */
899static int cciss_create_hba_sysfs_entry(struct ctlr_info *h)
900{
901 device_initialize(&h->dev);
902 h->dev.type = &cciss_host_type;
903 h->dev.bus = &cciss_bus_type;
904 dev_set_name(&h->dev, "%s", h->devname);
905 h->dev.parent = &h->pdev->dev;
906
907 return device_add(&h->dev);
908}
909
910/*
911 * Remove sysfs entries for an hba.
912 */
913static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h)
914{
915 device_del(&h->dev);
Stephen M. Cameron617e1342009-09-17 13:47:14 -0500916 put_device(&h->dev); /* final put. */
917}
918
919/* cciss_device_release is called when the reference count
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -0500920 * of h->drv[x]dev goes to zero.
Stephen M. Cameron617e1342009-09-17 13:47:14 -0500921 */
922static void cciss_device_release(struct device *dev)
923{
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -0500924 drive_info_struct *drv = to_drv(dev);
925 kfree(drv);
Andrew Patterson7fe06322009-06-02 14:48:39 +0200926}
927
928/*
929 * Initialize sysfs for each logical drive. This sets up and registers
930 * the 'c#d#' directory for each individual logical drive under
931 * /sys/bus/pci/devices/<dev/ccis#/. We also create a link from
932 * /sys/block/cciss!c#d# to this entry.
933 */
Stephen M. Cameron617e1342009-09-17 13:47:14 -0500934static long cciss_create_ld_sysfs_entry(struct ctlr_info *h,
Andrew Patterson7fe06322009-06-02 14:48:39 +0200935 int drv_index)
936{
Stephen M. Cameron617e1342009-09-17 13:47:14 -0500937 struct device *dev;
938
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -0500939 if (h->drv[drv_index]->device_initialized)
Stephen M. Cameron8ce51962009-09-17 13:47:34 -0500940 return 0;
941
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -0500942 dev = &h->drv[drv_index]->dev;
Stephen M. Cameron617e1342009-09-17 13:47:14 -0500943 device_initialize(dev);
944 dev->type = &cciss_dev_type;
945 dev->bus = &cciss_bus_type;
946 dev_set_name(dev, "c%dd%d", h->ctlr, drv_index);
947 dev->parent = &h->dev;
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -0500948 h->drv[drv_index]->device_initialized = 1;
Stephen M. Cameron617e1342009-09-17 13:47:14 -0500949 return device_add(dev);
Andrew Patterson7fe06322009-06-02 14:48:39 +0200950}
951
952/*
953 * Remove sysfs entries for a logical drive.
954 */
Stephen M. Cameron8ce51962009-09-17 13:47:34 -0500955static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index,
956 int ctlr_exiting)
Andrew Patterson7fe06322009-06-02 14:48:39 +0200957{
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -0500958 struct device *dev = &h->drv[drv_index]->dev;
Stephen M. Cameron8ce51962009-09-17 13:47:34 -0500959
960 /* special case for c*d0, we only destroy it on controller exit */
961 if (drv_index == 0 && !ctlr_exiting)
962 return;
963
Stephen M. Cameron617e1342009-09-17 13:47:14 -0500964 device_del(dev);
965 put_device(dev); /* the "final" put. */
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -0500966 h->drv[drv_index] = NULL;
Andrew Patterson7fe06322009-06-02 14:48:39 +0200967}
968
Bjorn Helgaas7c832832006-06-25 05:49:06 -0700969/*
970 * For operations that cannot sleep, a command block is allocated at init,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
Stephen M. Cameron6b4d96b2010-07-19 13:46:43 -0500972 * which ones are free or in use.
Bjorn Helgaas7c832832006-06-25 05:49:06 -0700973 */
Stephen M. Cameron6b4d96b2010-07-19 13:46:43 -0500974static CommandList_struct *cmd_alloc(ctlr_info_t *h)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975{
976 CommandList_struct *c;
Bjorn Helgaas7c832832006-06-25 05:49:06 -0700977 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978 u64bit temp64;
979 dma_addr_t cmd_dma_handle, err_dma_handle;
980
Stephen M. Cameron6b4d96b2010-07-19 13:46:43 -0500981 do {
982 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
983 if (i == h->nr_cmds)
Bjorn Helgaas7c832832006-06-25 05:49:06 -0700984 return NULL;
Akinobu Mita1f118bc2012-11-08 16:12:22 -0800985 } while (test_and_set_bit(i, h->cmd_pool_bits) != 0);
Stephen M. Cameron6b4d96b2010-07-19 13:46:43 -0500986 c = h->cmd_pool + i;
987 memset(c, 0, sizeof(CommandList_struct));
988 cmd_dma_handle = h->cmd_pool_dhandle + i * sizeof(CommandList_struct);
989 c->err_info = h->errinfo_pool + i;
990 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
991 err_dma_handle = h->errinfo_pool_dhandle
992 + i * sizeof(ErrorInfo_struct);
993 h->nr_allocs++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994
Stephen M. Cameron6b4d96b2010-07-19 13:46:43 -0500995 c->cmdindex = i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996
Jens Axboee6e1ee92011-01-10 21:50:33 +0100997 INIT_LIST_HEAD(&c->list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998 c->busaddr = (__u32) cmd_dma_handle;
Bjorn Helgaas7c832832006-06-25 05:49:06 -0700999 temp64.val = (__u64) err_dma_handle;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000 c->ErrDesc.Addr.lower = temp64.val32.lower;
1001 c->ErrDesc.Addr.upper = temp64.val32.upper;
1002 c->ErrDesc.Len = sizeof(ErrorInfo_struct);
Bjorn Helgaas7c832832006-06-25 05:49:06 -07001003
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004 c->ctlr = h->ctlr;
Bjorn Helgaas7c832832006-06-25 05:49:06 -07001005 return c;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006}
1007
Stephen M. Cameron6b4d96b2010-07-19 13:46:43 -05001008/* allocate a command using pci_alloc_consistent, used for ioctls,
1009 * etc., not for the main i/o path.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010 */
Stephen M. Cameron6b4d96b2010-07-19 13:46:43 -05001011static CommandList_struct *cmd_special_alloc(ctlr_info_t *h)
1012{
1013 CommandList_struct *c;
1014 u64bit temp64;
1015 dma_addr_t cmd_dma_handle, err_dma_handle;
1016
1017 c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
1018 sizeof(CommandList_struct), &cmd_dma_handle);
1019 if (c == NULL)
1020 return NULL;
1021 memset(c, 0, sizeof(CommandList_struct));
1022
1023 c->cmdindex = -1;
1024
1025 c->err_info = (ErrorInfo_struct *)
1026 pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
1027 &err_dma_handle);
1028
1029 if (c->err_info == NULL) {
1030 pci_free_consistent(h->pdev,
1031 sizeof(CommandList_struct), c, cmd_dma_handle);
1032 return NULL;
1033 }
1034 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
1035
Jens Axboee6e1ee92011-01-10 21:50:33 +01001036 INIT_LIST_HEAD(&c->list);
Stephen M. Cameron6b4d96b2010-07-19 13:46:43 -05001037 c->busaddr = (__u32) cmd_dma_handle;
1038 temp64.val = (__u64) err_dma_handle;
1039 c->ErrDesc.Addr.lower = temp64.val32.lower;
1040 c->ErrDesc.Addr.upper = temp64.val32.upper;
1041 c->ErrDesc.Len = sizeof(ErrorInfo_struct);
1042
1043 c->ctlr = h->ctlr;
1044 return c;
1045}
1046
1047static void cmd_free(ctlr_info_t *h, CommandList_struct *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048{
1049 int i;
Stephen M. Cameron6b4d96b2010-07-19 13:46:43 -05001050
1051 i = c - h->cmd_pool;
Akinobu Mita1f118bc2012-11-08 16:12:22 -08001052 clear_bit(i, h->cmd_pool_bits);
Stephen M. Cameron6b4d96b2010-07-19 13:46:43 -05001053 h->nr_frees++;
1054}
1055
1056static void cmd_special_free(ctlr_info_t *h, CommandList_struct *c)
1057{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058 u64bit temp64;
1059
Stephen M. Cameron6b4d96b2010-07-19 13:46:43 -05001060 temp64.val32.lower = c->ErrDesc.Addr.lower;
1061 temp64.val32.upper = c->ErrDesc.Addr.upper;
1062 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
1063 c->err_info, (dma_addr_t) temp64.val);
Stephen M. Cameron16011132011-03-12 10:02:21 +01001064 pci_free_consistent(h->pdev, sizeof(CommandList_struct), c,
1065 (dma_addr_t) cciss_tag_discard_error_bits(h, (u32) c->busaddr));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066}
1067
1068static inline ctlr_info_t *get_host(struct gendisk *disk)
1069{
Bjorn Helgaas7c832832006-06-25 05:49:06 -07001070 return disk->queue->queuedata;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071}
1072
1073static inline drive_info_struct *get_drv(struct gendisk *disk)
1074{
1075 return disk->private_data;
1076}
1077
1078/*
1079 * Open. Make sure the device is really there.
1080 */
Al Viroef7822c2008-03-02 09:26:41 -05001081static int cciss_open(struct block_device *bdev, fmode_t mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082{
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05001083 ctlr_info_t *h = get_host(bdev->bd_disk);
Al Viroef7822c2008-03-02 09:26:41 -05001084 drive_info_struct *drv = get_drv(bdev->bd_disk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05001086 dev_dbg(&h->pdev->dev, "cciss_open %s\n", bdev->bd_disk->disk_name);
Stephen M. Cameron2e043982009-09-17 13:48:05 -05001087 if (drv->busy_configuring)
Mike Millerddd47442005-09-13 01:25:22 -07001088 return -EBUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001089 /*
1090 * Root is allowed to open raw volume zero even if it's not configured
1091 * so array config can still work. Root is also allowed to open any
1092 * volume that has a LUN ID, so it can issue IOCTL to reread the
1093 * disk information. I don't think I really like this
1094 * but I'm already using way to many device nodes to claim another one
1095 * for "raw controller".
1096 */
Mike Miller7a06f782006-12-06 20:35:08 -08001097 if (drv->heads == 0) {
Al Viroef7822c2008-03-02 09:26:41 -05001098 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001099 /* if not node 0 make sure it is a partition = 0 */
Al Viroef7822c2008-03-02 09:26:41 -05001100 if (MINOR(bdev->bd_dev) & 0x0f) {
Bjorn Helgaas7c832832006-06-25 05:49:06 -07001101 return -ENXIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102 /* if it is, make sure we have a LUN ID */
Stephen M. Cameron39ccf9a2009-09-17 13:48:00 -05001103 } else if (memcmp(drv->LunID, CTLR_LUNID,
1104 sizeof(drv->LunID))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105 return -ENXIO;
1106 }
1107 }
1108 if (!capable(CAP_SYS_ADMIN))
1109 return -EPERM;
1110 }
1111 drv->usage_count++;
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05001112 h->usage_count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113 return 0;
1114}
Bjorn Helgaas7c832832006-06-25 05:49:06 -07001115
Arnd Bergmann6e9624b2010-08-07 18:25:34 +02001116static int cciss_unlocked_open(struct block_device *bdev, fmode_t mode)
1117{
1118 int ret;
1119
Arnd Bergmann2a48fc02010-06-02 14:28:52 +02001120 mutex_lock(&cciss_mutex);
Arnd Bergmann6e9624b2010-08-07 18:25:34 +02001121 ret = cciss_open(bdev, mode);
Arnd Bergmann2a48fc02010-06-02 14:28:52 +02001122 mutex_unlock(&cciss_mutex);
Arnd Bergmann6e9624b2010-08-07 18:25:34 +02001123
1124 return ret;
1125}
1126
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127/*
1128 * Close. Sync first.
1129 */
Al Virodb2a1442013-05-05 21:52:57 -04001130static void cciss_release(struct gendisk *disk, fmode_t mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131{
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05001132 ctlr_info_t *h;
Arnd Bergmann6e9624b2010-08-07 18:25:34 +02001133 drive_info_struct *drv;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134
Arnd Bergmann2a48fc02010-06-02 14:28:52 +02001135 mutex_lock(&cciss_mutex);
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05001136 h = get_host(disk);
Arnd Bergmann6e9624b2010-08-07 18:25:34 +02001137 drv = get_drv(disk);
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05001138 dev_dbg(&h->pdev->dev, "cciss_release %s\n", disk->disk_name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139 drv->usage_count--;
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05001140 h->usage_count--;
Arnd Bergmann2a48fc02010-06-02 14:28:52 +02001141 mutex_unlock(&cciss_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142}
1143
Arnd Bergmann8a6cfeb2010-07-08 10:18:46 +02001144#ifdef CONFIG_COMPAT
1145
Al Viroef7822c2008-03-02 09:26:41 -05001146static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
1147 unsigned cmd, unsigned long arg);
1148static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
1149 unsigned cmd, unsigned long arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150
Al Viroef7822c2008-03-02 09:26:41 -05001151static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode,
1152 unsigned cmd, unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001153{
1154 switch (cmd) {
1155 case CCISS_GETPCIINFO:
1156 case CCISS_GETINTINFO:
1157 case CCISS_SETINTINFO:
1158 case CCISS_GETNODENAME:
1159 case CCISS_SETNODENAME:
1160 case CCISS_GETHEARTBEAT:
1161 case CCISS_GETBUSTYPES:
1162 case CCISS_GETFIRMVER:
1163 case CCISS_GETDRIVVER:
1164 case CCISS_REVALIDVOLS:
1165 case CCISS_DEREGDISK:
1166 case CCISS_REGNEWDISK:
1167 case CCISS_REGNEWD:
1168 case CCISS_RESCANDISK:
1169 case CCISS_GETLUNINFO:
Stephen M. Cameron03f47e82013-06-12 14:04:47 -07001170 return cciss_ioctl(bdev, mode, cmd, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171
1172 case CCISS_PASSTHRU32:
Al Viroef7822c2008-03-02 09:26:41 -05001173 return cciss_ioctl32_passthru(bdev, mode, cmd, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001174 case CCISS_BIG_PASSTHRU32:
Al Viroef7822c2008-03-02 09:26:41 -05001175 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001176
1177 default:
1178 return -ENOIOCTLCMD;
1179 }
1180}
1181
Al Viroef7822c2008-03-02 09:26:41 -05001182static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
1183 unsigned cmd, unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184{
1185 IOCTL32_Command_struct __user *arg32 =
Bjorn Helgaas7c832832006-06-25 05:49:06 -07001186 (IOCTL32_Command_struct __user *) arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187 IOCTL_Command_struct arg64;
1188 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
1189 int err;
1190 u32 cp;
1191
Dan Carpenter58f09e02013-09-24 15:27:45 -07001192 memset(&arg64, 0, sizeof(arg64));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001193 err = 0;
Bjorn Helgaas7c832832006-06-25 05:49:06 -07001194 err |=
1195 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1196 sizeof(arg64.LUN_info));
1197 err |=
1198 copy_from_user(&arg64.Request, &arg32->Request,
1199 sizeof(arg64.Request));
1200 err |=
1201 copy_from_user(&arg64.error_info, &arg32->error_info,
1202 sizeof(arg64.error_info));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203 err |= get_user(arg64.buf_size, &arg32->buf_size);
1204 err |= get_user(cp, &arg32->buf);
1205 arg64.buf = compat_ptr(cp);
1206 err |= copy_to_user(p, &arg64, sizeof(arg64));
1207
1208 if (err)
1209 return -EFAULT;
1210
Stephen M. Cameron03f47e82013-06-12 14:04:47 -07001211 err = cciss_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212 if (err)
1213 return err;
Bjorn Helgaas7c832832006-06-25 05:49:06 -07001214 err |=
1215 copy_in_user(&arg32->error_info, &p->error_info,
1216 sizeof(arg32->error_info));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217 if (err)
1218 return -EFAULT;
1219 return err;
1220}
1221
Al Viroef7822c2008-03-02 09:26:41 -05001222static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
1223 unsigned cmd, unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224{
1225 BIG_IOCTL32_Command_struct __user *arg32 =
Bjorn Helgaas7c832832006-06-25 05:49:06 -07001226 (BIG_IOCTL32_Command_struct __user *) arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227 BIG_IOCTL_Command_struct arg64;
Bjorn Helgaas7c832832006-06-25 05:49:06 -07001228 BIG_IOCTL_Command_struct __user *p =
1229 compat_alloc_user_space(sizeof(arg64));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230 int err;
1231 u32 cp;
1232
Vasiliy Kulikov7ab51182010-10-28 06:31:55 -06001233 memset(&arg64, 0, sizeof(arg64));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234 err = 0;
Bjorn Helgaas7c832832006-06-25 05:49:06 -07001235 err |=
1236 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1237 sizeof(arg64.LUN_info));
1238 err |=
1239 copy_from_user(&arg64.Request, &arg32->Request,
1240 sizeof(arg64.Request));
1241 err |=
1242 copy_from_user(&arg64.error_info, &arg32->error_info,
1243 sizeof(arg64.error_info));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001244 err |= get_user(arg64.buf_size, &arg32->buf_size);
1245 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
1246 err |= get_user(cp, &arg32->buf);
1247 arg64.buf = compat_ptr(cp);
1248 err |= copy_to_user(p, &arg64, sizeof(arg64));
1249
1250 if (err)
Bjorn Helgaas7c832832006-06-25 05:49:06 -07001251 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252
Stephen M. Cameron03f47e82013-06-12 14:04:47 -07001253 err = cciss_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254 if (err)
1255 return err;
Bjorn Helgaas7c832832006-06-25 05:49:06 -07001256 err |=
1257 copy_in_user(&arg32->error_info, &p->error_info,
1258 sizeof(arg32->error_info));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259 if (err)
1260 return -EFAULT;
1261 return err;
1262}
1263#endif
Christoph Hellwiga885c8c2006-01-08 01:02:50 -08001264
1265static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1266{
1267 drive_info_struct *drv = get_drv(bdev->bd_disk);
1268
1269 if (!drv->cylinders)
1270 return -ENXIO;
1271
1272 geo->heads = drv->heads;
1273 geo->sectors = drv->sectors;
1274 geo->cylinders = drv->cylinders;
1275 return 0;
1276}
1277
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05001278static void check_ioctl_unit_attention(ctlr_info_t *h, CommandList_struct *c)
Mike Miller0a9279c2009-04-02 12:50:55 -07001279{
1280 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
1281 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05001282 (void)check_for_unit_attention(h, c);
Mike Miller0a9279c2009-04-02 12:50:55 -07001283}
Stephen M. Cameron0a25a5a2010-08-26 13:55:34 -05001284
1285static int cciss_getpciinfo(ctlr_info_t *h, void __user *argp)
1286{
1287 cciss_pci_info_struct pciinfo;
1288
1289 if (!argp)
1290 return -EINVAL;
1291 pciinfo.domain = pci_domain_nr(h->pdev->bus);
1292 pciinfo.bus = h->pdev->bus->number;
1293 pciinfo.dev_fn = h->pdev->devfn;
1294 pciinfo.board_id = h->board_id;
1295 if (copy_to_user(argp, &pciinfo, sizeof(cciss_pci_info_struct)))
1296 return -EFAULT;
1297 return 0;
1298}
1299
Stephen M. Cameron576e6612010-08-26 13:55:39 -05001300static int cciss_getintinfo(ctlr_info_t *h, void __user *argp)
1301{
1302 cciss_coalint_struct intinfo;
Stephen M. Cameron03f47e82013-06-12 14:04:47 -07001303 unsigned long flags;
Stephen M. Cameron576e6612010-08-26 13:55:39 -05001304
1305 if (!argp)
1306 return -EINVAL;
Stephen M. Cameron03f47e82013-06-12 14:04:47 -07001307 spin_lock_irqsave(&h->lock, flags);
Stephen M. Cameron576e6612010-08-26 13:55:39 -05001308 intinfo.delay = readl(&h->cfgtable->HostWrite.CoalIntDelay);
1309 intinfo.count = readl(&h->cfgtable->HostWrite.CoalIntCount);
Stephen M. Cameron03f47e82013-06-12 14:04:47 -07001310 spin_unlock_irqrestore(&h->lock, flags);
Stephen M. Cameron576e6612010-08-26 13:55:39 -05001311 if (copy_to_user
1312 (argp, &intinfo, sizeof(cciss_coalint_struct)))
1313 return -EFAULT;
1314 return 0;
1315}
1316
Stephen M. Cameron4c800ee2010-08-26 13:55:44 -05001317static int cciss_setintinfo(ctlr_info_t *h, void __user *argp)
1318{
1319 cciss_coalint_struct intinfo;
1320 unsigned long flags;
1321 int i;
1322
1323 if (!argp)
1324 return -EINVAL;
1325 if (!capable(CAP_SYS_ADMIN))
1326 return -EPERM;
1327 if (copy_from_user(&intinfo, argp, sizeof(intinfo)))
1328 return -EFAULT;
1329 if ((intinfo.delay == 0) && (intinfo.count == 0))
1330 return -EINVAL;
1331 spin_lock_irqsave(&h->lock, flags);
1332 /* Update the field, and then ring the doorbell */
1333 writel(intinfo.delay, &(h->cfgtable->HostWrite.CoalIntDelay));
1334 writel(intinfo.count, &(h->cfgtable->HostWrite.CoalIntCount));
1335 writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
1336
1337 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1338 if (!(readl(h->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
1339 break;
1340 udelay(1000); /* delay and try again */
1341 }
1342 spin_unlock_irqrestore(&h->lock, flags);
1343 if (i >= MAX_IOCTL_CONFIG_WAIT)
1344 return -EAGAIN;
1345 return 0;
1346}
1347
Stephen M. Cameron25216102010-08-26 13:55:49 -05001348static int cciss_getnodename(ctlr_info_t *h, void __user *argp)
1349{
1350 NodeName_type NodeName;
Stephen M. Cameron03f47e82013-06-12 14:04:47 -07001351 unsigned long flags;
Stephen M. Cameron25216102010-08-26 13:55:49 -05001352 int i;
1353
1354 if (!argp)
1355 return -EINVAL;
Stephen M. Cameron03f47e82013-06-12 14:04:47 -07001356 spin_lock_irqsave(&h->lock, flags);
Stephen M. Cameron25216102010-08-26 13:55:49 -05001357 for (i = 0; i < 16; i++)
1358 NodeName[i] = readb(&h->cfgtable->ServerName[i]);
Stephen M. Cameron03f47e82013-06-12 14:04:47 -07001359 spin_unlock_irqrestore(&h->lock, flags);
Stephen M. Cameron25216102010-08-26 13:55:49 -05001360 if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
1361 return -EFAULT;
1362 return 0;
1363}
1364
Stephen M. Cameron4f43f322010-08-26 13:55:54 -05001365static int cciss_setnodename(ctlr_info_t *h, void __user *argp)
1366{
1367 NodeName_type NodeName;
1368 unsigned long flags;
1369 int i;
1370
1371 if (!argp)
1372 return -EINVAL;
1373 if (!capable(CAP_SYS_ADMIN))
1374 return -EPERM;
1375 if (copy_from_user(NodeName, argp, sizeof(NodeName_type)))
1376 return -EFAULT;
1377 spin_lock_irqsave(&h->lock, flags);
1378 /* Update the field, and then ring the doorbell */
1379 for (i = 0; i < 16; i++)
1380 writeb(NodeName[i], &h->cfgtable->ServerName[i]);
1381 writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
1382 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1383 if (!(readl(h->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
1384 break;
1385 udelay(1000); /* delay and try again */
1386 }
1387 spin_unlock_irqrestore(&h->lock, flags);
1388 if (i >= MAX_IOCTL_CONFIG_WAIT)
1389 return -EAGAIN;
1390 return 0;
1391}
1392
Stephen M. Cameron93c74932010-08-26 13:55:59 -05001393static int cciss_getheartbeat(ctlr_info_t *h, void __user *argp)
1394{
1395 Heartbeat_type heartbeat;
Stephen M. Cameron03f47e82013-06-12 14:04:47 -07001396 unsigned long flags;
Stephen M. Cameron93c74932010-08-26 13:55:59 -05001397
1398 if (!argp)
1399 return -EINVAL;
Stephen M. Cameron03f47e82013-06-12 14:04:47 -07001400 spin_lock_irqsave(&h->lock, flags);
Stephen M. Cameron93c74932010-08-26 13:55:59 -05001401 heartbeat = readl(&h->cfgtable->HeartBeat);
Stephen M. Cameron03f47e82013-06-12 14:04:47 -07001402 spin_unlock_irqrestore(&h->lock, flags);
Stephen M. Cameron93c74932010-08-26 13:55:59 -05001403 if (copy_to_user(argp, &heartbeat, sizeof(Heartbeat_type)))
1404 return -EFAULT;
1405 return 0;
1406}
1407
Stephen M. Camerond18dfad2010-08-26 13:56:05 -05001408static int cciss_getbustypes(ctlr_info_t *h, void __user *argp)
1409{
1410 BusTypes_type BusTypes;
Stephen M. Cameron03f47e82013-06-12 14:04:47 -07001411 unsigned long flags;
Stephen M. Camerond18dfad2010-08-26 13:56:05 -05001412
1413 if (!argp)
1414 return -EINVAL;
Stephen M. Cameron03f47e82013-06-12 14:04:47 -07001415 spin_lock_irqsave(&h->lock, flags);
Stephen M. Camerond18dfad2010-08-26 13:56:05 -05001416 BusTypes = readl(&h->cfgtable->BusTypes);
Stephen M. Cameron03f47e82013-06-12 14:04:47 -07001417 spin_unlock_irqrestore(&h->lock, flags);
Stephen M. Camerond18dfad2010-08-26 13:56:05 -05001418 if (copy_to_user(argp, &BusTypes, sizeof(BusTypes_type)))
1419 return -EFAULT;
1420 return 0;
1421}
1422
Stephen M. Cameron8a4f7fb2010-08-26 13:56:10 -05001423static int cciss_getfirmver(ctlr_info_t *h, void __user *argp)
1424{
1425 FirmwareVer_type firmware;
1426
1427 if (!argp)
1428 return -EINVAL;
1429 memcpy(firmware, h->firm_ver, 4);
1430
1431 if (copy_to_user
1432 (argp, firmware, sizeof(FirmwareVer_type)))
1433 return -EFAULT;
1434 return 0;
1435}
1436
Stephen M. Cameronc5259192010-08-26 13:56:15 -05001437static int cciss_getdrivver(ctlr_info_t *h, void __user *argp)
1438{
1439 DriverVer_type DriverVer = DRIVER_VERSION;
1440
1441 if (!argp)
1442 return -EINVAL;
1443 if (copy_to_user(argp, &DriverVer, sizeof(DriverVer_type)))
1444 return -EFAULT;
1445 return 0;
1446}
1447
Stephen M. Cameron0894b322010-08-26 13:56:20 -05001448static int cciss_getluninfo(ctlr_info_t *h,
1449 struct gendisk *disk, void __user *argp)
1450{
1451 LogvolInfo_struct luninfo;
1452 drive_info_struct *drv = get_drv(disk);
1453
1454 if (!argp)
1455 return -EINVAL;
1456 memcpy(&luninfo.LunID, drv->LunID, sizeof(luninfo.LunID));
1457 luninfo.num_opens = drv->usage_count;
1458 luninfo.num_parts = 0;
1459 if (copy_to_user(argp, &luninfo, sizeof(LogvolInfo_struct)))
1460 return -EFAULT;
1461 return 0;
1462}
1463
Stephen M. Cameronf32f1252010-08-26 13:56:25 -05001464static int cciss_passthru(ctlr_info_t *h, void __user *argp)
1465{
1466 IOCTL_Command_struct iocommand;
1467 CommandList_struct *c;
1468 char *buff = NULL;
1469 u64bit temp64;
1470 DECLARE_COMPLETION_ONSTACK(wait);
1471
1472 if (!argp)
1473 return -EINVAL;
1474
1475 if (!capable(CAP_SYS_RAWIO))
1476 return -EPERM;
1477
1478 if (copy_from_user
1479 (&iocommand, argp, sizeof(IOCTL_Command_struct)))
1480 return -EFAULT;
1481 if ((iocommand.buf_size < 1) &&
1482 (iocommand.Request.Type.Direction != XFER_NONE)) {
1483 return -EINVAL;
1484 }
1485 if (iocommand.buf_size > 0) {
1486 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
1487 if (buff == NULL)
1488 return -EFAULT;
1489 }
1490 if (iocommand.Request.Type.Direction == XFER_WRITE) {
1491 /* Copy the data into the buffer we created */
1492 if (copy_from_user(buff, iocommand.buf, iocommand.buf_size)) {
1493 kfree(buff);
1494 return -EFAULT;
1495 }
1496 } else {
1497 memset(buff, 0, iocommand.buf_size);
1498 }
1499 c = cmd_special_alloc(h);
1500 if (!c) {
1501 kfree(buff);
1502 return -ENOMEM;
1503 }
1504 /* Fill in the command type */
1505 c->cmd_type = CMD_IOCTL_PEND;
1506 /* Fill in Command Header */
1507 c->Header.ReplyQueue = 0; /* unused in simple mode */
1508 if (iocommand.buf_size > 0) { /* buffer to fill */
1509 c->Header.SGList = 1;
1510 c->Header.SGTotal = 1;
1511 } else { /* no buffers to fill */
1512 c->Header.SGList = 0;
1513 c->Header.SGTotal = 0;
1514 }
1515 c->Header.LUN = iocommand.LUN_info;
1516 /* use the kernel address the cmd block for tag */
1517 c->Header.Tag.lower = c->busaddr;
1518
1519 /* Fill in Request block */
1520 c->Request = iocommand.Request;
1521
1522 /* Fill in the scatter gather information */
1523 if (iocommand.buf_size > 0) {
1524 temp64.val = pci_map_single(h->pdev, buff,
1525 iocommand.buf_size, PCI_DMA_BIDIRECTIONAL);
1526 c->SG[0].Addr.lower = temp64.val32.lower;
1527 c->SG[0].Addr.upper = temp64.val32.upper;
1528 c->SG[0].Len = iocommand.buf_size;
1529 c->SG[0].Ext = 0; /* we are not chaining */
1530 }
1531 c->waiting = &wait;
1532
1533 enqueue_cmd_and_start_io(h, c);
1534 wait_for_completion(&wait);
1535
1536 /* unlock the buffers from DMA */
1537 temp64.val32.lower = c->SG[0].Addr.lower;
1538 temp64.val32.upper = c->SG[0].Addr.upper;
1539 pci_unmap_single(h->pdev, (dma_addr_t) temp64.val, iocommand.buf_size,
1540 PCI_DMA_BIDIRECTIONAL);
1541 check_ioctl_unit_attention(h, c);
1542
1543 /* Copy the error information out */
1544 iocommand.error_info = *(c->err_info);
1545 if (copy_to_user(argp, &iocommand, sizeof(IOCTL_Command_struct))) {
1546 kfree(buff);
1547 cmd_special_free(h, c);
1548 return -EFAULT;
1549 }
1550
1551 if (iocommand.Request.Type.Direction == XFER_READ) {
1552 /* Copy the data out of the buffer we created */
1553 if (copy_to_user(iocommand.buf, buff, iocommand.buf_size)) {
1554 kfree(buff);
1555 cmd_special_free(h, c);
1556 return -EFAULT;
1557 }
1558 }
1559 kfree(buff);
1560 cmd_special_free(h, c);
1561 return 0;
1562}
1563
Stephen M. Cameron0c9f5ba2010-08-26 13:56:30 -05001564static int cciss_bigpassthru(ctlr_info_t *h, void __user *argp)
1565{
1566 BIG_IOCTL_Command_struct *ioc;
1567 CommandList_struct *c;
1568 unsigned char **buff = NULL;
1569 int *buff_size = NULL;
1570 u64bit temp64;
1571 BYTE sg_used = 0;
1572 int status = 0;
1573 int i;
1574 DECLARE_COMPLETION_ONSTACK(wait);
1575 __u32 left;
1576 __u32 sz;
1577 BYTE __user *data_ptr;
1578
1579 if (!argp)
1580 return -EINVAL;
1581 if (!capable(CAP_SYS_RAWIO))
1582 return -EPERM;
Stephen M. Cameronfcab1c12011-03-12 10:02:24 +01001583 ioc = kmalloc(sizeof(*ioc), GFP_KERNEL);
Stephen M. Cameron0c9f5ba2010-08-26 13:56:30 -05001584 if (!ioc) {
1585 status = -ENOMEM;
1586 goto cleanup1;
1587 }
1588 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
1589 status = -EFAULT;
1590 goto cleanup1;
1591 }
1592 if ((ioc->buf_size < 1) &&
1593 (ioc->Request.Type.Direction != XFER_NONE)) {
1594 status = -EINVAL;
1595 goto cleanup1;
1596 }
1597 /* Check kmalloc limits using all SGs */
1598 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
1599 status = -EINVAL;
1600 goto cleanup1;
1601 }
1602 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
1603 status = -EINVAL;
1604 goto cleanup1;
1605 }
1606 buff = kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
1607 if (!buff) {
1608 status = -ENOMEM;
1609 goto cleanup1;
1610 }
1611 buff_size = kmalloc(MAXSGENTRIES * sizeof(int), GFP_KERNEL);
1612 if (!buff_size) {
1613 status = -ENOMEM;
1614 goto cleanup1;
1615 }
1616 left = ioc->buf_size;
1617 data_ptr = ioc->buf;
1618 while (left) {
1619 sz = (left > ioc->malloc_size) ? ioc->malloc_size : left;
1620 buff_size[sg_used] = sz;
1621 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
1622 if (buff[sg_used] == NULL) {
1623 status = -ENOMEM;
1624 goto cleanup1;
1625 }
1626 if (ioc->Request.Type.Direction == XFER_WRITE) {
1627 if (copy_from_user(buff[sg_used], data_ptr, sz)) {
1628 status = -EFAULT;
1629 goto cleanup1;
1630 }
1631 } else {
1632 memset(buff[sg_used], 0, sz);
1633 }
1634 left -= sz;
1635 data_ptr += sz;
1636 sg_used++;
1637 }
1638 c = cmd_special_alloc(h);
1639 if (!c) {
1640 status = -ENOMEM;
1641 goto cleanup1;
1642 }
1643 c->cmd_type = CMD_IOCTL_PEND;
1644 c->Header.ReplyQueue = 0;
Stephen M. Cameronfcfb5c02010-08-26 13:56:35 -05001645 c->Header.SGList = sg_used;
1646 c->Header.SGTotal = sg_used;
Stephen M. Cameron0c9f5ba2010-08-26 13:56:30 -05001647 c->Header.LUN = ioc->LUN_info;
1648 c->Header.Tag.lower = c->busaddr;
1649
1650 c->Request = ioc->Request;
Stephen M. Cameronfcfb5c02010-08-26 13:56:35 -05001651 for (i = 0; i < sg_used; i++) {
1652 temp64.val = pci_map_single(h->pdev, buff[i], buff_size[i],
Stephen M. Cameron0c9f5ba2010-08-26 13:56:30 -05001653 PCI_DMA_BIDIRECTIONAL);
Stephen M. Cameronfcfb5c02010-08-26 13:56:35 -05001654 c->SG[i].Addr.lower = temp64.val32.lower;
1655 c->SG[i].Addr.upper = temp64.val32.upper;
1656 c->SG[i].Len = buff_size[i];
1657 c->SG[i].Ext = 0; /* we are not chaining */
Stephen M. Cameron0c9f5ba2010-08-26 13:56:30 -05001658 }
1659 c->waiting = &wait;
1660 enqueue_cmd_and_start_io(h, c);
1661 wait_for_completion(&wait);
1662 /* unlock the buffers from DMA */
1663 for (i = 0; i < sg_used; i++) {
1664 temp64.val32.lower = c->SG[i].Addr.lower;
1665 temp64.val32.upper = c->SG[i].Addr.upper;
1666 pci_unmap_single(h->pdev,
1667 (dma_addr_t) temp64.val, buff_size[i],
1668 PCI_DMA_BIDIRECTIONAL);
1669 }
1670 check_ioctl_unit_attention(h, c);
1671 /* Copy the error information out */
1672 ioc->error_info = *(c->err_info);
1673 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
1674 cmd_special_free(h, c);
1675 status = -EFAULT;
1676 goto cleanup1;
1677 }
1678 if (ioc->Request.Type.Direction == XFER_READ) {
1679 /* Copy the data out of the buffer we created */
1680 BYTE __user *ptr = ioc->buf;
1681 for (i = 0; i < sg_used; i++) {
1682 if (copy_to_user(ptr, buff[i], buff_size[i])) {
1683 cmd_special_free(h, c);
1684 status = -EFAULT;
1685 goto cleanup1;
1686 }
1687 ptr += buff_size[i];
1688 }
1689 }
1690 cmd_special_free(h, c);
1691 status = 0;
1692cleanup1:
1693 if (buff) {
1694 for (i = 0; i < sg_used; i++)
1695 kfree(buff[i]);
1696 kfree(buff);
1697 }
1698 kfree(buff_size);
1699 kfree(ioc);
1700 return status;
1701}
1702
Al Viroef7822c2008-03-02 09:26:41 -05001703static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
Stephen M. Cameronc5259192010-08-26 13:56:15 -05001704 unsigned int cmd, unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001705{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001706 struct gendisk *disk = bdev->bd_disk;
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05001707 ctlr_info_t *h = get_host(disk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001708 void __user *argp = (void __user *)arg;
1709
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05001710 dev_dbg(&h->pdev->dev, "cciss_ioctl: Called with cmd=%x %lx\n",
1711 cmd, arg);
Bjorn Helgaas7c832832006-06-25 05:49:06 -07001712 switch (cmd) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001713 case CCISS_GETPCIINFO:
Stephen M. Cameron0a25a5a2010-08-26 13:55:34 -05001714 return cciss_getpciinfo(h, argp);
Bjorn Helgaas7c832832006-06-25 05:49:06 -07001715 case CCISS_GETINTINFO:
Stephen M. Cameron576e6612010-08-26 13:55:39 -05001716 return cciss_getintinfo(h, argp);
Bjorn Helgaas7c832832006-06-25 05:49:06 -07001717 case CCISS_SETINTINFO:
Stephen M. Cameron4c800ee2010-08-26 13:55:44 -05001718 return cciss_setintinfo(h, argp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001719 case CCISS_GETNODENAME:
Stephen M. Cameron25216102010-08-26 13:55:49 -05001720 return cciss_getnodename(h, argp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001721 case CCISS_SETNODENAME:
Stephen M. Cameron4f43f322010-08-26 13:55:54 -05001722 return cciss_setnodename(h, argp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001723 case CCISS_GETHEARTBEAT:
Stephen M. Cameron93c74932010-08-26 13:55:59 -05001724 return cciss_getheartbeat(h, argp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001725 case CCISS_GETBUSTYPES:
Stephen M. Camerond18dfad2010-08-26 13:56:05 -05001726 return cciss_getbustypes(h, argp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001727 case CCISS_GETFIRMVER:
Stephen M. Cameron8a4f7fb2010-08-26 13:56:10 -05001728 return cciss_getfirmver(h, argp);
Bjorn Helgaas7c832832006-06-25 05:49:06 -07001729 case CCISS_GETDRIVVER:
Stephen M. Cameronc5259192010-08-26 13:56:15 -05001730 return cciss_getdrivver(h, argp);
Mike Miller6ae5ce82008-08-04 11:54:52 +02001731 case CCISS_DEREGDISK:
1732 case CCISS_REGNEWD:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001733 case CCISS_REVALIDVOLS:
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05001734 return rebuild_lun_table(h, 0, 1);
Stephen M. Cameron0894b322010-08-26 13:56:20 -05001735 case CCISS_GETLUNINFO:
1736 return cciss_getluninfo(h, disk, argp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001737 case CCISS_PASSTHRU:
Stephen M. Cameronf32f1252010-08-26 13:56:25 -05001738 return cciss_passthru(h, argp);
Stephen M. Cameron0c9f5ba2010-08-26 13:56:30 -05001739 case CCISS_BIG_PASSTHRU:
1740 return cciss_bigpassthru(h, argp);
Mike Miller (OS Dev)03bbfee2007-05-08 00:29:32 -07001741
Paolo Bonzini577ebb32012-01-12 16:01:27 +01001742 /* scsi_cmd_blk_ioctl handles these, below, though some are not */
Mike Miller (OS Dev)03bbfee2007-05-08 00:29:32 -07001743 /* very meaningful for cciss. SG_IO is the main one people want. */
1744
1745 case SG_GET_VERSION_NUM:
1746 case SG_SET_TIMEOUT:
1747 case SG_GET_TIMEOUT:
1748 case SG_GET_RESERVED_SIZE:
1749 case SG_SET_RESERVED_SIZE:
1750 case SG_EMULATED_HOST:
1751 case SG_IO:
1752 case SCSI_IOCTL_SEND_COMMAND:
Paolo Bonzini577ebb32012-01-12 16:01:27 +01001753 return scsi_cmd_blk_ioctl(bdev, mode, cmd, argp);
Mike Miller (OS Dev)03bbfee2007-05-08 00:29:32 -07001754
Paolo Bonzini577ebb32012-01-12 16:01:27 +01001755 /* scsi_cmd_blk_ioctl would normally handle these, below, but */
Mike Miller (OS Dev)03bbfee2007-05-08 00:29:32 -07001756 /* they aren't a good fit for cciss, as CD-ROMs are */
1757 /* not supported, and we don't have any bus/target/lun */
1758 /* which we present to the kernel. */
1759
1760 case CDROM_SEND_PACKET:
1761 case CDROMCLOSETRAY:
1762 case CDROMEJECT:
1763 case SCSI_IOCTL_GET_IDLUN:
1764 case SCSI_IOCTL_GET_BUS_NUMBER:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001765 default:
1766 return -ENOTTY;
1767 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001768}
1769
Jens Axboe7b30f092006-07-25 15:02:48 +02001770static void cciss_check_queues(ctlr_info_t *h)
1771{
1772 int start_queue = h->next_to_run;
1773 int i;
1774
1775 /* check to see if we have maxed out the number of commands that can
1776 * be placed on the queue. If so then exit. We do this check here
1777 * in case the interrupt we serviced was from an ioctl and did not
1778 * free any new commands.
1779 */
Mike Millerf8806322006-12-06 20:35:01 -08001780 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds)
Jens Axboe7b30f092006-07-25 15:02:48 +02001781 return;
1782
1783 /* We have room on the queue for more commands. Now we need to queue
1784 * them up. We will also keep track of the next queue to run so
1785 * that every queue gets a chance to be started first.
1786 */
1787 for (i = 0; i < h->highest_lun + 1; i++) {
1788 int curr_queue = (start_queue + i) % (h->highest_lun + 1);
1789 /* make sure the disk has been added and the drive is real
1790 * because this can be called from the middle of init_one.
1791 */
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05001792 if (!h->drv[curr_queue])
1793 continue;
1794 if (!(h->drv[curr_queue]->queue) ||
1795 !(h->drv[curr_queue]->heads))
Jens Axboe7b30f092006-07-25 15:02:48 +02001796 continue;
1797 blk_start_queue(h->gendisk[curr_queue]->queue);
1798
1799 /* check to see if we have maxed out the number of commands
1800 * that can be placed on the queue.
1801 */
Mike Millerf8806322006-12-06 20:35:01 -08001802 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) {
Jens Axboe7b30f092006-07-25 15:02:48 +02001803 if (curr_queue == start_queue) {
1804 h->next_to_run =
1805 (start_queue + 1) % (h->highest_lun + 1);
1806 break;
1807 } else {
1808 h->next_to_run = curr_queue;
1809 break;
1810 }
Jens Axboe7b30f092006-07-25 15:02:48 +02001811 }
1812 }
1813}
1814
Mike Millerca1e0482006-04-10 15:38:07 -07001815static void cciss_softirq_done(struct request *rq)
1816{
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05001817 CommandList_struct *c = rq->completion_data;
1818 ctlr_info_t *h = hba[c->ctlr];
1819 SGDescriptor_struct *curr_sg = c->SG;
Mike Millerca1e0482006-04-10 15:38:07 -07001820 u64bit temp64;
Mike Miller664a7172010-06-02 12:57:58 -07001821 unsigned long flags;
Mike Millerca1e0482006-04-10 15:38:07 -07001822 int i, ddir;
Don Brace5c07a312009-11-12 12:50:01 -06001823 int sg_index = 0;
Mike Millerca1e0482006-04-10 15:38:07 -07001824
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05001825 if (c->Request.Type.Direction == XFER_READ)
Mike Millerca1e0482006-04-10 15:38:07 -07001826 ddir = PCI_DMA_FROMDEVICE;
1827 else
1828 ddir = PCI_DMA_TODEVICE;
1829
1830 /* command did not need to be retried */
1831 /* unmap the DMA mapping for all the scatter gather elements */
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05001832 for (i = 0; i < c->Header.SGList; i++) {
Don Brace5c07a312009-11-12 12:50:01 -06001833 if (curr_sg[sg_index].Ext == CCISS_SG_CHAIN) {
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05001834 cciss_unmap_sg_chain_block(h, c);
Don Brace5c07a312009-11-12 12:50:01 -06001835 /* Point to the next block */
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05001836 curr_sg = h->cmd_sg_list[c->cmdindex];
Don Brace5c07a312009-11-12 12:50:01 -06001837 sg_index = 0;
1838 }
1839 temp64.val32.lower = curr_sg[sg_index].Addr.lower;
1840 temp64.val32.upper = curr_sg[sg_index].Addr.upper;
1841 pci_unmap_page(h->pdev, temp64.val, curr_sg[sg_index].Len,
1842 ddir);
1843 ++sg_index;
Mike Millerca1e0482006-04-10 15:38:07 -07001844 }
1845
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05001846 dev_dbg(&h->pdev->dev, "Done with %p\n", rq);
Mike Millerca1e0482006-04-10 15:38:07 -07001847
Tejun Heoc3a4d782009-05-07 22:24:37 +09001848 /* set the residual count for pc requests */
Christoph Hellwig33659eb2010-08-07 18:17:56 +02001849 if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05001850 rq->resid_len = c->err_info->ResidualCnt;
Jens Axboeac44e5b2009-03-27 10:43:52 +01001851
Tejun Heoc3a4d782009-05-07 22:24:37 +09001852 blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
Kiyoshi Ueda3daeea22007-12-11 17:50:03 -05001853
Mike Millerca1e0482006-04-10 15:38:07 -07001854 spin_lock_irqsave(&h->lock, flags);
Stephen M. Cameron6b4d96b2010-07-19 13:46:43 -05001855 cmd_free(h, c);
Jens Axboe7b30f092006-07-25 15:02:48 +02001856 cciss_check_queues(h);
Mike Millerca1e0482006-04-10 15:38:07 -07001857 spin_unlock_irqrestore(&h->lock, flags);
1858}
1859
Stephen M. Cameron39ccf9a2009-09-17 13:48:00 -05001860static inline void log_unit_to_scsi3addr(ctlr_info_t *h,
1861 unsigned char scsi3addr[], uint32_t log_unit)
scameron@beardog.cca.cpqcorp.netb57695f2009-06-08 16:02:17 -05001862{
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05001863 memcpy(scsi3addr, h->drv[log_unit]->LunID,
1864 sizeof(h->drv[log_unit]->LunID));
scameron@beardog.cca.cpqcorp.netb57695f2009-06-08 16:02:17 -05001865}
1866
Andrew Patterson7fe06322009-06-02 14:48:39 +02001867/* This function gets the SCSI vendor, model, and revision of a logical drive
1868 * via the inquiry page 0. Model, vendor, and rev are set to empty strings if
1869 * they cannot be read.
1870 */
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05001871static void cciss_get_device_descr(ctlr_info_t *h, int logvol,
Andrew Patterson7fe06322009-06-02 14:48:39 +02001872 char *vendor, char *model, char *rev)
1873{
1874 int rc;
1875 InquiryData_struct *inq_buf;
scameron@beardog.cca.cpqcorp.netb57695f2009-06-08 16:02:17 -05001876 unsigned char scsi3addr[8];
Andrew Patterson7fe06322009-06-02 14:48:39 +02001877
1878 *vendor = '\0';
1879 *model = '\0';
1880 *rev = '\0';
1881
1882 inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1883 if (!inq_buf)
1884 return;
1885
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05001886 log_unit_to_scsi3addr(h, scsi3addr, logvol);
1887 rc = sendcmd_withirq(h, CISS_INQUIRY, inq_buf, sizeof(*inq_buf), 0,
Stephen M. Cameron7b838bd2009-11-12 12:49:30 -06001888 scsi3addr, TYPE_CMD);
Andrew Patterson7fe06322009-06-02 14:48:39 +02001889 if (rc == IO_OK) {
1890 memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN);
1891 vendor[VENDOR_LEN] = '\0';
1892 memcpy(model, &inq_buf->data_byte[16], MODEL_LEN);
1893 model[MODEL_LEN] = '\0';
1894 memcpy(rev, &inq_buf->data_byte[32], REV_LEN);
1895 rev[REV_LEN] = '\0';
1896 }
1897
1898 kfree(inq_buf);
1899 return;
1900}
1901
Mike Millera72da292008-08-04 11:54:51 +02001902/* This function gets the serial number of a logical drive via
1903 * inquiry page 0x83. Serial no. is 16 bytes. If the serial
1904 * number cannot be had, for whatever reason, 16 bytes of 0xff
1905 * are returned instead.
1906 */
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05001907static void cciss_get_serial_no(ctlr_info_t *h, int logvol,
Mike Millera72da292008-08-04 11:54:51 +02001908 unsigned char *serial_no, int buflen)
1909{
1910#define PAGE_83_INQ_BYTES 64
1911 int rc;
1912 unsigned char *buf;
scameron@beardog.cca.cpqcorp.netb57695f2009-06-08 16:02:17 -05001913 unsigned char scsi3addr[8];
Mike Millera72da292008-08-04 11:54:51 +02001914
1915 if (buflen > 16)
1916 buflen = 16;
1917 memset(serial_no, 0xff, buflen);
1918 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL);
1919 if (!buf)
1920 return;
1921 memset(serial_no, 0, buflen);
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05001922 log_unit_to_scsi3addr(h, scsi3addr, logvol);
1923 rc = sendcmd_withirq(h, CISS_INQUIRY, buf,
Stephen M. Cameron7b838bd2009-11-12 12:49:30 -06001924 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
Mike Millera72da292008-08-04 11:54:51 +02001925 if (rc == IO_OK)
1926 memcpy(serial_no, &buf[8], buflen);
1927 kfree(buf);
1928 return;
1929}
1930
Stephen M. Cameron617e1342009-09-17 13:47:14 -05001931/*
1932 * cciss_add_disk sets up the block device queue for a logical drive
1933 */
1934static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
Mike Miller6ae5ce82008-08-04 11:54:52 +02001935 int drv_index)
1936{
1937 disk->queue = blk_init_queue(do_cciss_request, &h->lock);
Stephen M. Camerone8074f72009-09-17 13:47:24 -05001938 if (!disk->queue)
1939 goto init_queue_failure;
Mike Miller6ae5ce82008-08-04 11:54:52 +02001940 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index);
1941 disk->major = h->major;
1942 disk->first_minor = drv_index << NWD_SHIFT;
1943 disk->fops = &cciss_fops;
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05001944 if (cciss_create_ld_sysfs_entry(h, drv_index))
1945 goto cleanup_queue;
1946 disk->private_data = h->drv[drv_index];
1947 disk->driverfs_dev = &h->drv[drv_index]->dev;
Mike Miller6ae5ce82008-08-04 11:54:52 +02001948
1949 /* Set up queue information */
1950 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
1951
1952 /* This is a hardware imposed limit. */
Martin K. Petersen8a783622010-02-26 00:20:39 -05001953 blk_queue_max_segments(disk->queue, h->maxsgentries);
Mike Miller6ae5ce82008-08-04 11:54:52 +02001954
Martin K. Petersen086fa5f2010-02-26 00:20:38 -05001955 blk_queue_max_hw_sectors(disk->queue, h->cciss_max_sectors);
Mike Miller6ae5ce82008-08-04 11:54:52 +02001956
1957 blk_queue_softirq_done(disk->queue, cciss_softirq_done);
1958
1959 disk->queue->queuedata = h;
1960
Martin K. Petersene1defc42009-05-22 17:17:49 -04001961 blk_queue_logical_block_size(disk->queue,
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05001962 h->drv[drv_index]->block_size);
Mike Miller6ae5ce82008-08-04 11:54:52 +02001963
1964 /* Make sure all queue data is written out before */
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05001965 /* setting h->drv[drv_index]->queue, as setting this */
Mike Miller6ae5ce82008-08-04 11:54:52 +02001966 /* allows the interrupt handler to start the queue */
1967 wmb();
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05001968 h->drv[drv_index]->queue = disk->queue;
Mike Miller6ae5ce82008-08-04 11:54:52 +02001969 add_disk(disk);
Stephen M. Cameron617e1342009-09-17 13:47:14 -05001970 return 0;
1971
1972cleanup_queue:
1973 blk_cleanup_queue(disk->queue);
1974 disk->queue = NULL;
Stephen M. Camerone8074f72009-09-17 13:47:24 -05001975init_queue_failure:
Stephen M. Cameron617e1342009-09-17 13:47:14 -05001976 return -1;
Mike Miller6ae5ce82008-08-04 11:54:52 +02001977}
1978
Mike Millerddd47442005-09-13 01:25:22 -07001979/* This function will check the usage_count of the drive to be updated/added.
Mike Millera72da292008-08-04 11:54:51 +02001980 * If the usage_count is zero and it is a heretofore unknown drive, or,
1981 * the drive's capacity, geometry, or serial number has changed,
1982 * then the drive information will be updated and the disk will be
1983 * re-registered with the kernel. If these conditions don't hold,
1984 * then it will be left alone for the next reboot. The exception to this
1985 * is disk 0 which will always be left registered with the kernel since it
1986 * is also the controller node. Any changes to disk 0 will show up on
1987 * the next reboot.
Bjorn Helgaas7c832832006-06-25 05:49:06 -07001988 */
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05001989static void cciss_update_drive_info(ctlr_info_t *h, int drv_index,
1990 int first_time, int via_ioctl)
Bjorn Helgaas7c832832006-06-25 05:49:06 -07001991{
Mike Millerddd47442005-09-13 01:25:22 -07001992 struct gendisk *disk;
Mike Millerddd47442005-09-13 01:25:22 -07001993 InquiryData_struct *inq_buff = NULL;
1994 unsigned int block_size;
Mike Miller (OS Dev)00988a32006-09-30 23:27:23 -07001995 sector_t total_size;
Mike Millerddd47442005-09-13 01:25:22 -07001996 unsigned long flags = 0;
1997 int ret = 0;
Mike Millera72da292008-08-04 11:54:51 +02001998 drive_info_struct *drvinfo;
1999
2000 /* Get information about the disk and modify the driver structure */
2001 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002002 drvinfo = kzalloc(sizeof(*drvinfo), GFP_KERNEL);
Mike Millera72da292008-08-04 11:54:51 +02002003 if (inq_buff == NULL || drvinfo == NULL)
2004 goto mem_msg;
2005
2006 /* testing to see if 16-byte CDBs are already being used */
2007 if (h->cciss_read == CCISS_READ_16) {
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05002008 cciss_read_capacity_16(h, drv_index,
Mike Millera72da292008-08-04 11:54:51 +02002009 &total_size, &block_size);
2010
2011 } else {
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05002012 cciss_read_capacity(h, drv_index, &total_size, &block_size);
Mike Millera72da292008-08-04 11:54:51 +02002013 /* if read_capacity returns all F's this volume is >2TB */
2014 /* in size so we switch to 16-byte CDB's for all */
2015 /* read/write ops */
2016 if (total_size == 0xFFFFFFFFULL) {
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05002017 cciss_read_capacity_16(h, drv_index,
Mike Millera72da292008-08-04 11:54:51 +02002018 &total_size, &block_size);
2019 h->cciss_read = CCISS_READ_16;
2020 h->cciss_write = CCISS_WRITE_16;
2021 } else {
2022 h->cciss_read = CCISS_READ_10;
2023 h->cciss_write = CCISS_WRITE_10;
2024 }
2025 }
2026
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05002027 cciss_geometry_inquiry(h, drv_index, total_size, block_size,
Mike Millera72da292008-08-04 11:54:51 +02002028 inq_buff, drvinfo);
2029 drvinfo->block_size = block_size;
2030 drvinfo->nr_blocks = total_size + 1;
2031
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05002032 cciss_get_device_descr(h, drv_index, drvinfo->vendor,
Andrew Patterson7fe06322009-06-02 14:48:39 +02002033 drvinfo->model, drvinfo->rev);
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05002034 cciss_get_serial_no(h, drv_index, drvinfo->serial_no,
Mike Millera72da292008-08-04 11:54:51 +02002035 sizeof(drvinfo->serial_no));
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002036 /* Save the lunid in case we deregister the disk, below. */
2037 memcpy(drvinfo->LunID, h->drv[drv_index]->LunID,
2038 sizeof(drvinfo->LunID));
Mike Millera72da292008-08-04 11:54:51 +02002039
2040 /* Is it the same disk we already know, and nothing's changed? */
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002041 if (h->drv[drv_index]->raid_level != -1 &&
Mike Millera72da292008-08-04 11:54:51 +02002042 ((memcmp(drvinfo->serial_no,
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002043 h->drv[drv_index]->serial_no, 16) == 0) &&
2044 drvinfo->block_size == h->drv[drv_index]->block_size &&
2045 drvinfo->nr_blocks == h->drv[drv_index]->nr_blocks &&
2046 drvinfo->heads == h->drv[drv_index]->heads &&
2047 drvinfo->sectors == h->drv[drv_index]->sectors &&
2048 drvinfo->cylinders == h->drv[drv_index]->cylinders))
Mike Millera72da292008-08-04 11:54:51 +02002049 /* The disk is unchanged, nothing to update */
2050 goto freeret;
Mike Millera72da292008-08-04 11:54:51 +02002051
Mike Miller6ae5ce82008-08-04 11:54:52 +02002052 /* If we get here it's not the same disk, or something's changed,
2053 * so we need to * deregister it, and re-register it, if it's not
2054 * in use.
2055 * If the disk already exists then deregister it before proceeding
2056 * (unless it's the first disk (for the controller node).
2057 */
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002058 if (h->drv[drv_index]->raid_level != -1 && drv_index != 0) {
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05002059 dev_warn(&h->pdev->dev, "disk %d has changed.\n", drv_index);
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05002060 spin_lock_irqsave(&h->lock, flags);
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002061 h->drv[drv_index]->busy_configuring = 1;
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05002062 spin_unlock_irqrestore(&h->lock, flags);
scameron@beardog.cca.cpqcorp.nete14ac672008-04-17 13:19:03 +02002063
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002064 /* deregister_disk sets h->drv[drv_index]->queue = NULL
Mike Miller6ae5ce82008-08-04 11:54:52 +02002065 * which keeps the interrupt handler from starting
2066 * the queue.
2067 */
Stephen M. Cameron2d11d992009-09-17 13:47:44 -05002068 ret = deregister_disk(h, drv_index, 0, via_ioctl);
Mike Millerddd47442005-09-13 01:25:22 -07002069 }
2070
2071 /* If the disk is in use return */
2072 if (ret)
Mike Millera72da292008-08-04 11:54:51 +02002073 goto freeret;
Mike Millerddd47442005-09-13 01:25:22 -07002074
Mike Miller6ae5ce82008-08-04 11:54:52 +02002075 /* Save the new information from cciss_geometry_inquiry
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002076 * and serial number inquiry. If the disk was deregistered
2077 * above, then h->drv[drv_index] will be NULL.
Mike Miller6ae5ce82008-08-04 11:54:52 +02002078 */
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002079 if (h->drv[drv_index] == NULL) {
2080 drvinfo->device_initialized = 0;
2081 h->drv[drv_index] = drvinfo;
2082 drvinfo = NULL; /* so it won't be freed below. */
2083 } else {
2084 /* special case for cxd0 */
2085 h->drv[drv_index]->block_size = drvinfo->block_size;
2086 h->drv[drv_index]->nr_blocks = drvinfo->nr_blocks;
2087 h->drv[drv_index]->heads = drvinfo->heads;
2088 h->drv[drv_index]->sectors = drvinfo->sectors;
2089 h->drv[drv_index]->cylinders = drvinfo->cylinders;
2090 h->drv[drv_index]->raid_level = drvinfo->raid_level;
2091 memcpy(h->drv[drv_index]->serial_no, drvinfo->serial_no, 16);
2092 memcpy(h->drv[drv_index]->vendor, drvinfo->vendor,
2093 VENDOR_LEN + 1);
2094 memcpy(h->drv[drv_index]->model, drvinfo->model, MODEL_LEN + 1);
2095 memcpy(h->drv[drv_index]->rev, drvinfo->rev, REV_LEN + 1);
2096 }
Mike Millerddd47442005-09-13 01:25:22 -07002097
2098 ++h->num_luns;
2099 disk = h->gendisk[drv_index];
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002100 set_capacity(disk, h->drv[drv_index]->nr_blocks);
Mike Millerddd47442005-09-13 01:25:22 -07002101
Mike Miller6ae5ce82008-08-04 11:54:52 +02002102 /* If it's not disk 0 (drv_index != 0)
2103 * or if it was disk 0, but there was previously
2104 * no actual corresponding configured logical drive
2105 * (raid_leve == -1) then we want to update the
2106 * logical drive's information.
2107 */
Stephen M. Cameron361e9b02009-09-17 13:47:29 -05002108 if (drv_index || first_time) {
2109 if (cciss_add_disk(h, disk, drv_index) != 0) {
2110 cciss_free_gendisk(h, drv_index);
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002111 cciss_free_drive_info(h, drv_index);
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05002112 dev_warn(&h->pdev->dev, "could not update disk %d\n",
2113 drv_index);
Stephen M. Cameron361e9b02009-09-17 13:47:29 -05002114 --h->num_luns;
2115 }
2116 }
Mike Millerddd47442005-09-13 01:25:22 -07002117
Mike Miller6ae5ce82008-08-04 11:54:52 +02002118freeret:
Mike Millerddd47442005-09-13 01:25:22 -07002119 kfree(inq_buff);
Mike Millera72da292008-08-04 11:54:51 +02002120 kfree(drvinfo);
Mike Millerddd47442005-09-13 01:25:22 -07002121 return;
Mike Miller6ae5ce82008-08-04 11:54:52 +02002122mem_msg:
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05002123 dev_err(&h->pdev->dev, "out of memory\n");
Mike Millerddd47442005-09-13 01:25:22 -07002124 goto freeret;
2125}
2126
2127/* This function will find the first index of the controllers drive array
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002128 * that has a null drv pointer and allocate the drive info struct and
2129 * will return that index This is where new drives will be added.
2130 * If the index to be returned is greater than the highest_lun index for
2131 * the controller then highest_lun is set * to this new index.
2132 * If there are no available indexes or if tha allocation fails, then -1
2133 * is returned. * "controller_node" is used to know if this is a real
2134 * logical drive, or just the controller node, which determines if this
2135 * counts towards highest_lun.
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002136 */
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002137static int cciss_alloc_drive_info(ctlr_info_t *h, int controller_node)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002138{
Mike Millerddd47442005-09-13 01:25:22 -07002139 int i;
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002140 drive_info_struct *drv;
Mike Millerddd47442005-09-13 01:25:22 -07002141
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002142 /* Search for an empty slot for our drive info */
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002143 for (i = 0; i < CISS_MAX_LUN; i++) {
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002144
2145 /* if not cxd0 case, and it's occupied, skip it. */
2146 if (h->drv[i] && i != 0)
2147 continue;
2148 /*
2149 * If it's cxd0 case, and drv is alloc'ed already, and a
2150 * disk is configured there, skip it.
2151 */
2152 if (i == 0 && h->drv[i] && h->drv[i]->raid_level != -1)
2153 continue;
2154
2155 /*
2156 * We've found an empty slot. Update highest_lun
2157 * provided this isn't just the fake cxd0 controller node.
2158 */
2159 if (i > h->highest_lun && !controller_node)
2160 h->highest_lun = i;
2161
2162 /* If adding a real disk at cxd0, and it's already alloc'ed */
2163 if (i == 0 && h->drv[i] != NULL)
Mike Millerddd47442005-09-13 01:25:22 -07002164 return i;
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002165
2166 /*
2167 * Found an empty slot, not already alloc'ed. Allocate it.
2168 * Mark it with raid_level == -1, so we know it's new later on.
2169 */
2170 drv = kzalloc(sizeof(*drv), GFP_KERNEL);
2171 if (!drv)
2172 return -1;
2173 drv->raid_level = -1; /* so we know it's new */
2174 h->drv[i] = drv;
2175 return i;
Mike Millerddd47442005-09-13 01:25:22 -07002176 }
2177 return -1;
2178}
2179
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002180static void cciss_free_drive_info(ctlr_info_t *h, int drv_index)
2181{
2182 kfree(h->drv[drv_index]);
2183 h->drv[drv_index] = NULL;
2184}
2185
Stephen M. Cameron361e9b02009-09-17 13:47:29 -05002186static void cciss_free_gendisk(ctlr_info_t *h, int drv_index)
2187{
2188 put_disk(h->gendisk[drv_index]);
2189 h->gendisk[drv_index] = NULL;
2190}
2191
Mike Miller6ae5ce82008-08-04 11:54:52 +02002192/* cciss_add_gendisk finds a free hba[]->drv structure
2193 * and allocates a gendisk if needed, and sets the lunid
2194 * in the drvinfo structure. It returns the index into
2195 * the ->drv[] array, or -1 if none are free.
2196 * is_controller_node indicates whether highest_lun should
2197 * count this disk, or if it's only being added to provide
2198 * a means to talk to the controller in case no logical
2199 * drives have yet been configured.
2200 */
Stephen M. Cameron39ccf9a2009-09-17 13:48:00 -05002201static int cciss_add_gendisk(ctlr_info_t *h, unsigned char lunid[],
2202 int controller_node)
Mike Miller6ae5ce82008-08-04 11:54:52 +02002203{
2204 int drv_index;
2205
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002206 drv_index = cciss_alloc_drive_info(h, controller_node);
Mike Miller6ae5ce82008-08-04 11:54:52 +02002207 if (drv_index == -1)
2208 return -1;
Stephen M. Cameron8ce51962009-09-17 13:47:34 -05002209
Mike Miller6ae5ce82008-08-04 11:54:52 +02002210 /*Check if the gendisk needs to be allocated */
2211 if (!h->gendisk[drv_index]) {
2212 h->gendisk[drv_index] =
2213 alloc_disk(1 << NWD_SHIFT);
2214 if (!h->gendisk[drv_index]) {
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05002215 dev_err(&h->pdev->dev,
2216 "could not allocate a new disk %d\n",
2217 drv_index);
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002218 goto err_free_drive_info;
Mike Miller6ae5ce82008-08-04 11:54:52 +02002219 }
2220 }
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002221 memcpy(h->drv[drv_index]->LunID, lunid,
2222 sizeof(h->drv[drv_index]->LunID));
2223 if (cciss_create_ld_sysfs_entry(h, drv_index))
Andrew Patterson7fe06322009-06-02 14:48:39 +02002224 goto err_free_disk;
Mike Miller6ae5ce82008-08-04 11:54:52 +02002225 /* Don't need to mark this busy because nobody */
2226 /* else knows about this disk yet to contend */
2227 /* for access to it. */
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002228 h->drv[drv_index]->busy_configuring = 0;
Mike Miller6ae5ce82008-08-04 11:54:52 +02002229 wmb();
2230 return drv_index;
Andrew Patterson7fe06322009-06-02 14:48:39 +02002231
2232err_free_disk:
Stephen M. Cameron361e9b02009-09-17 13:47:29 -05002233 cciss_free_gendisk(h, drv_index);
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002234err_free_drive_info:
2235 cciss_free_drive_info(h, drv_index);
Andrew Patterson7fe06322009-06-02 14:48:39 +02002236 return -1;
Mike Miller6ae5ce82008-08-04 11:54:52 +02002237}
2238
2239/* This is for the special case of a controller which
2240 * has no logical drives. In this case, we still need
2241 * to register a disk so the controller can be accessed
2242 * by the Array Config Utility.
2243 */
2244static void cciss_add_controller_node(ctlr_info_t *h)
2245{
2246 struct gendisk *disk;
2247 int drv_index;
2248
2249 if (h->gendisk[0] != NULL) /* already did this? Then bail. */
2250 return;
2251
Stephen M. Cameron39ccf9a2009-09-17 13:48:00 -05002252 drv_index = cciss_add_gendisk(h, CTLR_LUNID, 1);
Stephen M. Cameron361e9b02009-09-17 13:47:29 -05002253 if (drv_index == -1)
2254 goto error;
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002255 h->drv[drv_index]->block_size = 512;
2256 h->drv[drv_index]->nr_blocks = 0;
2257 h->drv[drv_index]->heads = 0;
2258 h->drv[drv_index]->sectors = 0;
2259 h->drv[drv_index]->cylinders = 0;
2260 h->drv[drv_index]->raid_level = -1;
2261 memset(h->drv[drv_index]->serial_no, 0, 16);
Mike Miller6ae5ce82008-08-04 11:54:52 +02002262 disk = h->gendisk[drv_index];
Stephen M. Cameron361e9b02009-09-17 13:47:29 -05002263 if (cciss_add_disk(h, disk, drv_index) == 0)
2264 return;
2265 cciss_free_gendisk(h, drv_index);
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002266 cciss_free_drive_info(h, drv_index);
Stephen M. Cameron361e9b02009-09-17 13:47:29 -05002267error:
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05002268 dev_warn(&h->pdev->dev, "could not add disk 0.\n");
Stephen M. Cameron361e9b02009-09-17 13:47:29 -05002269 return;
Mike Miller6ae5ce82008-08-04 11:54:52 +02002270}
2271
Mike Millerddd47442005-09-13 01:25:22 -07002272/* This function will add and remove logical drives from the Logical
Bjorn Helgaasd14c4ab2006-06-25 05:49:04 -07002273 * drive array of the controller and maintain persistency of ordering
Mike Millerddd47442005-09-13 01:25:22 -07002274 * so that mount points are preserved until the next reboot. This allows
2275 * for the removal of logical drives in the middle of the drive array
2276 * without a re-ordering of those drives.
2277 * INPUT
2278 * h = The controller to perform the operations on
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002279 */
Stephen M. Cameron2d11d992009-09-17 13:47:44 -05002280static int rebuild_lun_table(ctlr_info_t *h, int first_time,
2281 int via_ioctl)
Mike Millerddd47442005-09-13 01:25:22 -07002282{
Mike Millerddd47442005-09-13 01:25:22 -07002283 int num_luns;
2284 ReportLunData_struct *ld_buff = NULL;
Mike Millerddd47442005-09-13 01:25:22 -07002285 int return_code;
2286 int listlength = 0;
2287 int i;
2288 int drv_found;
2289 int drv_index = 0;
Stephen M. Cameron39ccf9a2009-09-17 13:48:00 -05002290 unsigned char lunid[8] = CTLR_LUNID;
Mike Millerddd47442005-09-13 01:25:22 -07002291 unsigned long flags;
2292
Mike Miller6ae5ce82008-08-04 11:54:52 +02002293 if (!capable(CAP_SYS_RAWIO))
2294 return -EPERM;
2295
Mike Millerddd47442005-09-13 01:25:22 -07002296 /* Set busy_configuring flag for this operation */
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05002297 spin_lock_irqsave(&h->lock, flags);
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002298 if (h->busy_configuring) {
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05002299 spin_unlock_irqrestore(&h->lock, flags);
Mike Millerddd47442005-09-13 01:25:22 -07002300 return -EBUSY;
2301 }
2302 h->busy_configuring = 1;
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05002303 spin_unlock_irqrestore(&h->lock, flags);
Mike Millerddd47442005-09-13 01:25:22 -07002304
Mike Millera72da292008-08-04 11:54:51 +02002305 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
2306 if (ld_buff == NULL)
2307 goto mem_msg;
Mike Millerddd47442005-09-13 01:25:22 -07002308
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05002309 return_code = sendcmd_withirq(h, CISS_REPORT_LOG, ld_buff,
scameron@beardog.cca.cpqcorp.netb57695f2009-06-08 16:02:17 -05002310 sizeof(ReportLunData_struct),
2311 0, CTLR_LUNID, TYPE_CMD);
Mike Millerddd47442005-09-13 01:25:22 -07002312
Mike Millera72da292008-08-04 11:54:51 +02002313 if (return_code == IO_OK)
2314 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
2315 else { /* reading number of logical volumes failed */
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05002316 dev_warn(&h->pdev->dev,
2317 "report logical volume command failed\n");
Mike Millera72da292008-08-04 11:54:51 +02002318 listlength = 0;
2319 goto freeret;
2320 }
Mike Millerddd47442005-09-13 01:25:22 -07002321
Mike Millera72da292008-08-04 11:54:51 +02002322 num_luns = listlength / 8; /* 8 bytes per entry */
2323 if (num_luns > CISS_MAX_LUN) {
2324 num_luns = CISS_MAX_LUN;
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05002325 dev_warn(&h->pdev->dev, "more luns configured"
Mike Millera72da292008-08-04 11:54:51 +02002326 " on controller than can be handled by"
2327 " this driver.\n");
2328 }
Mike Millerddd47442005-09-13 01:25:22 -07002329
Mike Miller6ae5ce82008-08-04 11:54:52 +02002330 if (num_luns == 0)
2331 cciss_add_controller_node(h);
2332
2333 /* Compare controller drive array to driver's drive array
2334 * to see if any drives are missing on the controller due
2335 * to action of Array Config Utility (user deletes drive)
2336 * and deregister logical drives which have disappeared.
2337 */
Mike Millera72da292008-08-04 11:54:51 +02002338 for (i = 0; i <= h->highest_lun; i++) {
2339 int j;
2340 drv_found = 0;
Stephen M. Camerond8a0be62008-12-18 14:55:11 +01002341
2342 /* skip holes in the array from already deleted drives */
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002343 if (h->drv[i] == NULL)
Stephen M. Camerond8a0be62008-12-18 14:55:11 +01002344 continue;
2345
Mike Millera72da292008-08-04 11:54:51 +02002346 for (j = 0; j < num_luns; j++) {
Stephen M. Cameron39ccf9a2009-09-17 13:48:00 -05002347 memcpy(lunid, &ld_buff->LUN[j][0], sizeof(lunid));
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002348 if (memcmp(h->drv[i]->LunID, lunid,
Stephen M. Cameron39ccf9a2009-09-17 13:48:00 -05002349 sizeof(lunid)) == 0) {
Mike Millera72da292008-08-04 11:54:51 +02002350 drv_found = 1;
2351 break;
Mike Millerddd47442005-09-13 01:25:22 -07002352 }
Mike Millera72da292008-08-04 11:54:51 +02002353 }
2354 if (!drv_found) {
2355 /* Deregister it from the OS, it's gone. */
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05002356 spin_lock_irqsave(&h->lock, flags);
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002357 h->drv[i]->busy_configuring = 1;
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05002358 spin_unlock_irqrestore(&h->lock, flags);
Stephen M. Cameron2d11d992009-09-17 13:47:44 -05002359 return_code = deregister_disk(h, i, 1, via_ioctl);
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002360 if (h->drv[i] != NULL)
2361 h->drv[i]->busy_configuring = 0;
Mike Millera72da292008-08-04 11:54:51 +02002362 }
2363 }
Mike Millerddd47442005-09-13 01:25:22 -07002364
Mike Millera72da292008-08-04 11:54:51 +02002365 /* Compare controller drive array to driver's drive array.
2366 * Check for updates in the drive information and any new drives
2367 * on the controller due to ACU adding logical drives, or changing
2368 * a logical drive's size, etc. Reregister any new/changed drives
2369 */
2370 for (i = 0; i < num_luns; i++) {
2371 int j;
Mike Millerddd47442005-09-13 01:25:22 -07002372
Mike Millera72da292008-08-04 11:54:51 +02002373 drv_found = 0;
2374
Stephen M. Cameron39ccf9a2009-09-17 13:48:00 -05002375 memcpy(lunid, &ld_buff->LUN[i][0], sizeof(lunid));
Mike Millera72da292008-08-04 11:54:51 +02002376 /* Find if the LUN is already in the drive array
2377 * of the driver. If so then update its info
2378 * if not in use. If it does not exist then find
2379 * the first free index and add it.
2380 */
2381 for (j = 0; j <= h->highest_lun; j++) {
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002382 if (h->drv[j] != NULL &&
2383 memcmp(h->drv[j]->LunID, lunid,
2384 sizeof(h->drv[j]->LunID)) == 0) {
Mike Millera72da292008-08-04 11:54:51 +02002385 drv_index = j;
2386 drv_found = 1;
2387 break;
2388 }
2389 }
2390
2391 /* check if the drive was found already in the array */
2392 if (!drv_found) {
Mike Millereece6952008-08-04 11:54:53 +02002393 drv_index = cciss_add_gendisk(h, lunid, 0);
Mike Millera72da292008-08-04 11:54:51 +02002394 if (drv_index == -1)
2395 goto freeret;
Mike Millera72da292008-08-04 11:54:51 +02002396 }
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05002397 cciss_update_drive_info(h, drv_index, first_time, via_ioctl);
Mike Millera72da292008-08-04 11:54:51 +02002398 } /* end for */
Mike Millerddd47442005-09-13 01:25:22 -07002399
Mike Miller6ae5ce82008-08-04 11:54:52 +02002400freeret:
Mike Millerddd47442005-09-13 01:25:22 -07002401 kfree(ld_buff);
2402 h->busy_configuring = 0;
2403 /* We return -1 here to tell the ACU that we have registered/updated
2404 * all of the drives that we can and to keep it from calling us
2405 * additional times.
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002406 */
Mike Millerddd47442005-09-13 01:25:22 -07002407 return -1;
Mike Miller6ae5ce82008-08-04 11:54:52 +02002408mem_msg:
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05002409 dev_err(&h->pdev->dev, "out of memory\n");
Mike Millera72da292008-08-04 11:54:51 +02002410 h->busy_configuring = 0;
Mike Millerddd47442005-09-13 01:25:22 -07002411 goto freeret;
2412}
2413
Stephen M. Cameron9ddb27b2009-09-17 13:47:39 -05002414static void cciss_clear_drive_info(drive_info_struct *drive_info)
2415{
2416 /* zero out the disk size info */
2417 drive_info->nr_blocks = 0;
2418 drive_info->block_size = 0;
2419 drive_info->heads = 0;
2420 drive_info->sectors = 0;
2421 drive_info->cylinders = 0;
2422 drive_info->raid_level = -1;
2423 memset(drive_info->serial_no, 0, sizeof(drive_info->serial_no));
2424 memset(drive_info->model, 0, sizeof(drive_info->model));
2425 memset(drive_info->rev, 0, sizeof(drive_info->rev));
2426 memset(drive_info->vendor, 0, sizeof(drive_info->vendor));
2427 /*
2428 * don't clear the LUNID though, we need to remember which
2429 * one this one is.
2430 */
2431}
2432
Mike Millerddd47442005-09-13 01:25:22 -07002433/* This function will deregister the disk and it's queue from the
2434 * kernel. It must be called with the controller lock held and the
2435 * drv structures busy_configuring flag set. It's parameters are:
2436 *
2437 * disk = This is the disk to be deregistered
2438 * drv = This is the drive_info_struct associated with the disk to be
2439 * deregistered. It contains information about the disk used
2440 * by the driver.
2441 * clear_all = This flag determines whether or not the disk information
2442 * is going to be completely cleared out and the highest_lun
2443 * reset. Sometimes we want to clear out information about
Bjorn Helgaasd14c4ab2006-06-25 05:49:04 -07002444 * the disk in preparation for re-adding it. In this case
Mike Millerddd47442005-09-13 01:25:22 -07002445 * the highest_lun should be left unchanged and the LunID
2446 * should not be cleared.
Stephen M. Cameron2d11d992009-09-17 13:47:44 -05002447 * via_ioctl
2448 * This indicates whether we've reached this path via ioctl.
2449 * This affects the maximum usage count allowed for c0d0 to be messed with.
2450 * If this path is reached via ioctl(), then the max_usage_count will
2451 * be 1, as the process calling ioctl() has got to have the device open.
2452 * If we get here via sysfs, then the max usage count will be zero.
Mike Millerddd47442005-09-13 01:25:22 -07002453*/
Stephen M. Camerona0ea8622008-12-18 14:55:51 +01002454static int deregister_disk(ctlr_info_t *h, int drv_index,
Stephen M. Cameron2d11d992009-09-17 13:47:44 -05002455 int clear_all, int via_ioctl)
Mike Millerddd47442005-09-13 01:25:22 -07002456{
Mike Miller799202c2006-12-06 20:35:12 -08002457 int i;
Stephen M. Camerona0ea8622008-12-18 14:55:51 +01002458 struct gendisk *disk;
2459 drive_info_struct *drv;
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002460 int recalculate_highest_lun;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002461
2462 if (!capable(CAP_SYS_RAWIO))
2463 return -EPERM;
2464
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002465 drv = h->drv[drv_index];
Stephen M. Camerona0ea8622008-12-18 14:55:51 +01002466 disk = h->gendisk[drv_index];
2467
Linus Torvalds1da177e2005-04-16 15:20:36 -07002468 /* make sure logical volume is NOT is use */
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002469 if (clear_all || (h->gendisk[0] == disk)) {
Stephen M. Cameron2d11d992009-09-17 13:47:44 -05002470 if (drv->usage_count > via_ioctl)
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002471 return -EBUSY;
2472 } else if (drv->usage_count > 0)
2473 return -EBUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002474
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002475 recalculate_highest_lun = (drv == h->drv[h->highest_lun]);
2476
Mike Millerddd47442005-09-13 01:25:22 -07002477 /* invalidate the devices and deregister the disk. If it is disk
2478 * zero do not deregister it but just zero out it's values. This
2479 * allows us to delete disk zero but keep the controller registered.
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002480 */
2481 if (h->gendisk[0] != disk) {
Adrian Bunk5a9df732007-10-16 23:29:26 -07002482 struct request_queue *q = disk->queue;
Stephen M. Cameron097d0262009-09-17 13:47:19 -05002483 if (disk->flags & GENHD_FL_UP) {
Stephen M. Cameron8ce51962009-09-17 13:47:34 -05002484 cciss_destroy_ld_sysfs_entry(h, drv_index, 0);
Adrian Bunk5a9df732007-10-16 23:29:26 -07002485 del_gendisk(disk);
Adrian Bunk5a9df732007-10-16 23:29:26 -07002486 }
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002487 if (q)
Adrian Bunk5a9df732007-10-16 23:29:26 -07002488 blk_cleanup_queue(q);
Adrian Bunk5a9df732007-10-16 23:29:26 -07002489 /* If clear_all is set then we are deleting the logical
2490 * drive, not just refreshing its info. For drives
2491 * other than disk 0 we will call put_disk. We do not
2492 * do this for disk 0 as we need it to be able to
2493 * configure the controller.
Mike Millera72da292008-08-04 11:54:51 +02002494 */
Adrian Bunk5a9df732007-10-16 23:29:26 -07002495 if (clear_all){
2496 /* This isn't pretty, but we need to find the
2497 * disk in our array and NULL our the pointer.
2498 * This is so that we will call alloc_disk if
2499 * this index is used again later.
Mike Millera72da292008-08-04 11:54:51 +02002500 */
Adrian Bunk5a9df732007-10-16 23:29:26 -07002501 for (i=0; i < CISS_MAX_LUN; i++){
Mike Millera72da292008-08-04 11:54:51 +02002502 if (h->gendisk[i] == disk) {
Adrian Bunk5a9df732007-10-16 23:29:26 -07002503 h->gendisk[i] = NULL;
2504 break;
Mike Miller799202c2006-12-06 20:35:12 -08002505 }
Mike Miller799202c2006-12-06 20:35:12 -08002506 }
Adrian Bunk5a9df732007-10-16 23:29:26 -07002507 put_disk(disk);
Mike Millerddd47442005-09-13 01:25:22 -07002508 }
Mike Miller799202c2006-12-06 20:35:12 -08002509 } else {
2510 set_capacity(disk, 0);
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002511 cciss_clear_drive_info(drv);
Mike Millerddd47442005-09-13 01:25:22 -07002512 }
2513
2514 --h->num_luns;
Mike Millerddd47442005-09-13 01:25:22 -07002515
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002516 /* if it was the last disk, find the new hightest lun */
2517 if (clear_all && recalculate_highest_lun) {
Bill Pembertonc2d45b42010-04-30 09:34:32 -04002518 int newhighest = -1;
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002519 for (i = 0; i <= h->highest_lun; i++) {
2520 /* if the disk has size > 0, it is available */
2521 if (h->drv[i] && h->drv[i]->heads)
2522 newhighest = i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002523 }
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002524 h->highest_lun = newhighest;
Mike Millerddd47442005-09-13 01:25:22 -07002525 }
Bjorn Helgaase2019b52006-06-25 05:49:05 -07002526 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002527}
Mike Millerddd47442005-09-13 01:25:22 -07002528
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05002529static int fill_cmd(ctlr_info_t *h, CommandList_struct *c, __u8 cmd, void *buff,
scameron@beardog.cca.cpqcorp.netb57695f2009-06-08 16:02:17 -05002530 size_t size, __u8 page_code, unsigned char *scsi3addr,
2531 int cmd_type)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002532{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002533 u64bit buff_dma_handle;
2534 int status = IO_OK;
2535
2536 c->cmd_type = CMD_IOCTL_PEND;
2537 c->Header.ReplyQueue = 0;
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002538 if (buff != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002539 c->Header.SGList = 1;
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002540 c->Header.SGTotal = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002541 } else {
2542 c->Header.SGList = 0;
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002543 c->Header.SGTotal = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002544 }
2545 c->Header.Tag.lower = c->busaddr;
scameron@beardog.cca.cpqcorp.netb57695f2009-06-08 16:02:17 -05002546 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002547
2548 c->Request.Type.Type = cmd_type;
2549 if (cmd_type == TYPE_CMD) {
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002550 switch (cmd) {
2551 case CISS_INQUIRY:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002552 /* are we trying to read a vital product page */
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002553 if (page_code != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002554 c->Request.CDB[1] = 0x01;
2555 c->Request.CDB[2] = page_code;
2556 }
2557 c->Request.CDBLen = 6;
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002558 c->Request.Type.Attribute = ATTR_SIMPLE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002559 c->Request.Type.Direction = XFER_READ;
2560 c->Request.Timeout = 0;
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002561 c->Request.CDB[0] = CISS_INQUIRY;
2562 c->Request.CDB[4] = size & 0xFF;
2563 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002564 case CISS_REPORT_LOG:
2565 case CISS_REPORT_PHYS:
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002566 /* Talking to controller so It's a physical command
Linus Torvalds1da177e2005-04-16 15:20:36 -07002567 mode = 00 target = 0. Nothing to write.
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002568 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002569 c->Request.CDBLen = 12;
2570 c->Request.Type.Attribute = ATTR_SIMPLE;
2571 c->Request.Type.Direction = XFER_READ;
2572 c->Request.Timeout = 0;
2573 c->Request.CDB[0] = cmd;
dann frazierb0284612010-02-17 16:53:31 -07002574 c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002575 c->Request.CDB[7] = (size >> 16) & 0xFF;
2576 c->Request.CDB[8] = (size >> 8) & 0xFF;
2577 c->Request.CDB[9] = size & 0xFF;
2578 break;
2579
2580 case CCISS_READ_CAPACITY:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002581 c->Request.CDBLen = 10;
2582 c->Request.Type.Attribute = ATTR_SIMPLE;
2583 c->Request.Type.Direction = XFER_READ;
2584 c->Request.Timeout = 0;
2585 c->Request.CDB[0] = cmd;
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002586 break;
Mike Miller (OS Dev)00988a32006-09-30 23:27:23 -07002587 case CCISS_READ_CAPACITY_16:
Mike Miller (OS Dev)00988a32006-09-30 23:27:23 -07002588 c->Request.CDBLen = 16;
2589 c->Request.Type.Attribute = ATTR_SIMPLE;
2590 c->Request.Type.Direction = XFER_READ;
2591 c->Request.Timeout = 0;
2592 c->Request.CDB[0] = cmd;
2593 c->Request.CDB[1] = 0x10;
2594 c->Request.CDB[10] = (size >> 24) & 0xFF;
2595 c->Request.CDB[11] = (size >> 16) & 0xFF;
2596 c->Request.CDB[12] = (size >> 8) & 0xFF;
2597 c->Request.CDB[13] = size & 0xFF;
2598 c->Request.Timeout = 0;
2599 c->Request.CDB[0] = cmd;
2600 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002601 case CCISS_CACHE_FLUSH:
2602 c->Request.CDBLen = 12;
2603 c->Request.Type.Attribute = ATTR_SIMPLE;
2604 c->Request.Type.Direction = XFER_WRITE;
2605 c->Request.Timeout = 0;
2606 c->Request.CDB[0] = BMIC_WRITE;
2607 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
Stephen M. Cameron59bd71a2011-11-28 20:12:05 +01002608 c->Request.CDB[7] = (size >> 8) & 0xFF;
2609 c->Request.CDB[8] = size & 0xFF;
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002610 break;
Stephen M. Cameron88f627a2009-06-02 14:48:11 +02002611 case TEST_UNIT_READY:
Stephen M. Cameron88f627a2009-06-02 14:48:11 +02002612 c->Request.CDBLen = 6;
2613 c->Request.Type.Attribute = ATTR_SIMPLE;
2614 c->Request.Type.Direction = XFER_NONE;
2615 c->Request.Timeout = 0;
2616 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002617 default:
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05002618 dev_warn(&h->pdev->dev, "Unknown Command 0x%c\n", cmd);
Bjorn Helgaase2019b52006-06-25 05:49:05 -07002619 return IO_ERROR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002620 }
2621 } else if (cmd_type == TYPE_MSG) {
2622 switch (cmd) {
Stephen M. Cameron8f71bb82011-05-03 14:53:26 -05002623 case CCISS_ABORT_MSG:
mike.miller@hp.com3da8b712005-11-04 12:30:37 -06002624 c->Request.CDBLen = 12;
2625 c->Request.Type.Attribute = ATTR_SIMPLE;
2626 c->Request.Type.Direction = XFER_WRITE;
2627 c->Request.Timeout = 0;
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002628 c->Request.CDB[0] = cmd; /* abort */
2629 c->Request.CDB[1] = 0; /* abort a command */
mike.miller@hp.com3da8b712005-11-04 12:30:37 -06002630 /* buff contains the tag of the command to abort */
2631 memcpy(&c->Request.CDB[4], buff, 8);
2632 break;
Stephen M. Cameron8f71bb82011-05-03 14:53:26 -05002633 case CCISS_RESET_MSG:
Stephen M. Cameron88f627a2009-06-02 14:48:11 +02002634 c->Request.CDBLen = 16;
mike.miller@hp.com3da8b712005-11-04 12:30:37 -06002635 c->Request.Type.Attribute = ATTR_SIMPLE;
Stephen M. Cameron88f627a2009-06-02 14:48:11 +02002636 c->Request.Type.Direction = XFER_NONE;
mike.miller@hp.com3da8b712005-11-04 12:30:37 -06002637 c->Request.Timeout = 0;
2638 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002639 c->Request.CDB[0] = cmd; /* reset */
Stephen M. Cameron8f71bb82011-05-03 14:53:26 -05002640 c->Request.CDB[1] = CCISS_RESET_TYPE_TARGET;
Mike Miller (OS Dev)00988a32006-09-30 23:27:23 -07002641 break;
Stephen M. Cameron8f71bb82011-05-03 14:53:26 -05002642 case CCISS_NOOP_MSG:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002643 c->Request.CDBLen = 1;
2644 c->Request.Type.Attribute = ATTR_SIMPLE;
2645 c->Request.Type.Direction = XFER_WRITE;
2646 c->Request.Timeout = 0;
2647 c->Request.CDB[0] = cmd;
2648 break;
2649 default:
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05002650 dev_warn(&h->pdev->dev,
2651 "unknown message type %d\n", cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002652 return IO_ERROR;
2653 }
2654 } else {
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05002655 dev_warn(&h->pdev->dev, "unknown command type %d\n", cmd_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002656 return IO_ERROR;
2657 }
2658 /* Fill in the scatter gather information */
2659 if (size > 0) {
2660 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002661 buff, size,
2662 PCI_DMA_BIDIRECTIONAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002663 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
2664 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
2665 c->SG[0].Len = size;
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002666 c->SG[0].Ext = 0; /* we are not chaining */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002667 }
2668 return status;
2669}
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002670
Greg Kroah-Hartman8d85fce2012-12-21 15:13:49 -08002671static int cciss_send_reset(ctlr_info_t *h, unsigned char *scsi3addr,
2672 u8 reset_type)
Jens Axboeedc83d472011-05-06 08:27:00 -06002673{
2674 CommandList_struct *c;
2675 int return_status;
2676
2677 c = cmd_alloc(h);
2678 if (!c)
2679 return -ENOMEM;
2680 return_status = fill_cmd(h, c, CCISS_RESET_MSG, NULL, 0, 0,
2681 CTLR_LUNID, TYPE_MSG);
2682 c->Request.CDB[1] = reset_type; /* fill_cmd defaults to target reset */
2683 if (return_status != IO_OK) {
2684 cmd_special_free(h, c);
2685 return return_status;
2686 }
2687 c->waiting = NULL;
2688 enqueue_cmd_and_start_io(h, c);
2689 /* Don't wait for completion, the reset won't complete. Don't free
2690 * the command either. This is the last command we will send before
2691 * re-initializing everything, so it doesn't matter and won't leak.
2692 */
2693 return 0;
2694}
2695
scameron@beardog.cca.cpqcorp.net3c2ab402009-06-08 16:04:35 -05002696static int check_target_status(ctlr_info_t *h, CommandList_struct *c)
2697{
2698 switch (c->err_info->ScsiStatus) {
2699 case SAM_STAT_GOOD:
2700 return IO_OK;
2701 case SAM_STAT_CHECK_CONDITION:
2702 switch (0xf & c->err_info->SenseInfo[2]) {
2703 case 0: return IO_OK; /* no sense */
2704 case 1: return IO_OK; /* recovered error */
2705 default:
Stephen M. Cameronc08fac62009-11-12 12:49:25 -06002706 if (check_for_unit_attention(h, c))
2707 return IO_NEEDS_RETRY;
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05002708 dev_warn(&h->pdev->dev, "cmd 0x%02x "
scameron@beardog.cca.cpqcorp.net3c2ab402009-06-08 16:04:35 -05002709 "check condition, sense key = 0x%02x\n",
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05002710 c->Request.CDB[0], c->err_info->SenseInfo[2]);
scameron@beardog.cca.cpqcorp.net3c2ab402009-06-08 16:04:35 -05002711 }
2712 break;
2713 default:
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05002714 dev_warn(&h->pdev->dev, "cmd 0x%02x"
2715 "scsi status = 0x%02x\n",
scameron@beardog.cca.cpqcorp.net3c2ab402009-06-08 16:04:35 -05002716 c->Request.CDB[0], c->err_info->ScsiStatus);
2717 break;
2718 }
2719 return IO_ERROR;
2720}
2721
scameron@beardog.cca.cpqcorp.net789a4242009-06-08 16:05:56 -05002722static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c)
scameron@beardog.cca.cpqcorp.net5390cfc2009-06-08 16:01:11 -05002723{
scameron@beardog.cca.cpqcorp.net5390cfc2009-06-08 16:01:11 -05002724 int return_status = IO_OK;
2725
scameron@beardog.cca.cpqcorp.net789a4242009-06-08 16:05:56 -05002726 if (c->err_info->CommandStatus == CMD_SUCCESS)
2727 return IO_OK;
scameron@beardog.cca.cpqcorp.net5390cfc2009-06-08 16:01:11 -05002728
2729 switch (c->err_info->CommandStatus) {
2730 case CMD_TARGET_STATUS:
scameron@beardog.cca.cpqcorp.net3c2ab402009-06-08 16:04:35 -05002731 return_status = check_target_status(h, c);
scameron@beardog.cca.cpqcorp.net5390cfc2009-06-08 16:01:11 -05002732 break;
2733 case CMD_DATA_UNDERRUN:
2734 case CMD_DATA_OVERRUN:
2735 /* expected for inquiry and report lun commands */
2736 break;
2737 case CMD_INVALID:
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05002738 dev_warn(&h->pdev->dev, "cmd 0x%02x is "
scameron@beardog.cca.cpqcorp.net5390cfc2009-06-08 16:01:11 -05002739 "reported invalid\n", c->Request.CDB[0]);
2740 return_status = IO_ERROR;
2741 break;
2742 case CMD_PROTOCOL_ERR:
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05002743 dev_warn(&h->pdev->dev, "cmd 0x%02x has "
2744 "protocol error\n", c->Request.CDB[0]);
scameron@beardog.cca.cpqcorp.net5390cfc2009-06-08 16:01:11 -05002745 return_status = IO_ERROR;
2746 break;
2747 case CMD_HARDWARE_ERR:
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05002748 dev_warn(&h->pdev->dev, "cmd 0x%02x had "
scameron@beardog.cca.cpqcorp.net5390cfc2009-06-08 16:01:11 -05002749 " hardware error\n", c->Request.CDB[0]);
2750 return_status = IO_ERROR;
2751 break;
2752 case CMD_CONNECTION_LOST:
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05002753 dev_warn(&h->pdev->dev, "cmd 0x%02x had "
scameron@beardog.cca.cpqcorp.net5390cfc2009-06-08 16:01:11 -05002754 "connection lost\n", c->Request.CDB[0]);
2755 return_status = IO_ERROR;
2756 break;
2757 case CMD_ABORTED:
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05002758 dev_warn(&h->pdev->dev, "cmd 0x%02x was "
scameron@beardog.cca.cpqcorp.net5390cfc2009-06-08 16:01:11 -05002759 "aborted\n", c->Request.CDB[0]);
2760 return_status = IO_ERROR;
2761 break;
2762 case CMD_ABORT_FAILED:
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05002763 dev_warn(&h->pdev->dev, "cmd 0x%02x reports "
scameron@beardog.cca.cpqcorp.net5390cfc2009-06-08 16:01:11 -05002764 "abort failed\n", c->Request.CDB[0]);
2765 return_status = IO_ERROR;
2766 break;
2767 case CMD_UNSOLICITED_ABORT:
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05002768 dev_warn(&h->pdev->dev, "unsolicited abort 0x%02x\n",
scameron@beardog.cca.cpqcorp.net5390cfc2009-06-08 16:01:11 -05002769 c->Request.CDB[0]);
scameron@beardog.cca.cpqcorp.net789a4242009-06-08 16:05:56 -05002770 return_status = IO_NEEDS_RETRY;
scameron@beardog.cca.cpqcorp.net5390cfc2009-06-08 16:01:11 -05002771 break;
Stephen M. Cameron6d9a4f92011-03-12 10:02:30 +01002772 case CMD_UNABORTABLE:
2773 dev_warn(&h->pdev->dev, "cmd unabortable\n");
2774 return_status = IO_ERROR;
2775 break;
scameron@beardog.cca.cpqcorp.net5390cfc2009-06-08 16:01:11 -05002776 default:
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05002777 dev_warn(&h->pdev->dev, "cmd 0x%02x returned "
scameron@beardog.cca.cpqcorp.net5390cfc2009-06-08 16:01:11 -05002778 "unknown status %x\n", c->Request.CDB[0],
2779 c->err_info->CommandStatus);
2780 return_status = IO_ERROR;
2781 }
scameron@beardog.cca.cpqcorp.net789a4242009-06-08 16:05:56 -05002782 return return_status;
2783}
2784
2785static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
2786 int attempt_retry)
2787{
2788 DECLARE_COMPLETION_ONSTACK(wait);
2789 u64bit buff_dma_handle;
scameron@beardog.cca.cpqcorp.net789a4242009-06-08 16:05:56 -05002790 int return_status = IO_OK;
2791
2792resend_cmd2:
2793 c->waiting = &wait;
Mike Miller664a7172010-06-02 12:57:58 -07002794 enqueue_cmd_and_start_io(h, c);
scameron@beardog.cca.cpqcorp.net789a4242009-06-08 16:05:56 -05002795
2796 wait_for_completion(&wait);
2797
2798 if (c->err_info->CommandStatus == 0 || !attempt_retry)
2799 goto command_done;
2800
2801 return_status = process_sendcmd_error(h, c);
2802
2803 if (return_status == IO_NEEDS_RETRY &&
2804 c->retry_count < MAX_CMD_RETRIES) {
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05002805 dev_warn(&h->pdev->dev, "retrying 0x%02x\n",
scameron@beardog.cca.cpqcorp.net789a4242009-06-08 16:05:56 -05002806 c->Request.CDB[0]);
2807 c->retry_count++;
2808 /* erase the old error information */
2809 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2810 return_status = IO_OK;
2811 INIT_COMPLETION(wait);
2812 goto resend_cmd2;
2813 }
scameron@beardog.cca.cpqcorp.net5390cfc2009-06-08 16:01:11 -05002814
2815command_done:
2816 /* unlock the buffers from DMA */
2817 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2818 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
2819 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
2820 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
2821 return return_status;
2822}
2823
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05002824static int sendcmd_withirq(ctlr_info_t *h, __u8 cmd, void *buff, size_t size,
scameron@beardog.cca.cpqcorp.netb57695f2009-06-08 16:02:17 -05002825 __u8 page_code, unsigned char scsi3addr[],
2826 int cmd_type)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002827{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002828 CommandList_struct *c;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002829 int return_status;
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002830
Stephen M. Cameron6b4d96b2010-07-19 13:46:43 -05002831 c = cmd_special_alloc(h);
scameron@beardog.cca.cpqcorp.net5390cfc2009-06-08 16:01:11 -05002832 if (!c)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002833 return -ENOMEM;
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05002834 return_status = fill_cmd(h, c, cmd, buff, size, page_code,
scameron@beardog.cca.cpqcorp.netb57695f2009-06-08 16:02:17 -05002835 scsi3addr, cmd_type);
scameron@beardog.cca.cpqcorp.net5390cfc2009-06-08 16:01:11 -05002836 if (return_status == IO_OK)
scameron@beardog.cca.cpqcorp.net789a4242009-06-08 16:05:56 -05002837 return_status = sendcmd_withirq_core(h, c, 1);
2838
Stephen M. Cameron6b4d96b2010-07-19 13:46:43 -05002839 cmd_special_free(h, c);
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002840 return return_status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002841}
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002842
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05002843static void cciss_geometry_inquiry(ctlr_info_t *h, int logvol,
Stephen M. Cameron7b838bd2009-11-12 12:49:30 -06002844 sector_t total_size,
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002845 unsigned int block_size,
2846 InquiryData_struct *inq_buff,
2847 drive_info_struct *drv)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002848{
2849 int return_code;
Mike Miller (OS Dev)00988a32006-09-30 23:27:23 -07002850 unsigned long t;
scameron@beardog.cca.cpqcorp.netb57695f2009-06-08 16:02:17 -05002851 unsigned char scsi3addr[8];
Mike Miller (OS Dev)00988a32006-09-30 23:27:23 -07002852
Linus Torvalds1da177e2005-04-16 15:20:36 -07002853 memset(inq_buff, 0, sizeof(InquiryData_struct));
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05002854 log_unit_to_scsi3addr(h, scsi3addr, logvol);
2855 return_code = sendcmd_withirq(h, CISS_INQUIRY, inq_buff,
Stephen M. Cameron7b838bd2009-11-12 12:49:30 -06002856 sizeof(*inq_buff), 0xC1, scsi3addr, TYPE_CMD);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002857 if (return_code == IO_OK) {
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002858 if (inq_buff->data_byte[8] == 0xFF) {
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05002859 dev_warn(&h->pdev->dev,
2860 "reading geometry failed, volume "
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002861 "does not support reading geometry\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002862 drv->heads = 255;
dann frazierb0284612010-02-17 16:53:31 -07002863 drv->sectors = 32; /* Sectors per track */
Mike Miller (OS Dev)7f42d3b2007-04-04 19:08:23 -07002864 drv->cylinders = total_size + 1;
Mike Miller89f97ad2006-12-18 10:59:39 +01002865 drv->raid_level = RAID_UNKNOWN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002866 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002867 drv->heads = inq_buff->data_byte[6];
2868 drv->sectors = inq_buff->data_byte[7];
2869 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
2870 drv->cylinders += inq_buff->data_byte[5];
2871 drv->raid_level = inq_buff->data_byte[8];
Matthew Wilcox3f7705e2006-10-21 10:24:19 -07002872 }
2873 drv->block_size = block_size;
Mike Miller (OS Dev)97c06972007-03-06 01:42:14 -08002874 drv->nr_blocks = total_size + 1;
Matthew Wilcox3f7705e2006-10-21 10:24:19 -07002875 t = drv->heads * drv->sectors;
2876 if (t > 1) {
Mike Miller (OS Dev)97c06972007-03-06 01:42:14 -08002877 sector_t real_size = total_size + 1;
2878 unsigned long rem = sector_div(real_size, t);
Matthew Wilcox3f7705e2006-10-21 10:24:19 -07002879 if (rem)
Mike Miller (OS Dev)97c06972007-03-06 01:42:14 -08002880 real_size++;
2881 drv->cylinders = real_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002882 }
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002883 } else { /* Get geometry failed */
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05002884 dev_warn(&h->pdev->dev, "reading geometry failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002885 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002886}
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002887
Linus Torvalds1da177e2005-04-16 15:20:36 -07002888static void
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05002889cciss_read_capacity(ctlr_info_t *h, int logvol, sector_t *total_size,
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002890 unsigned int *block_size)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002891{
Mike Miller (OS Dev)00988a32006-09-30 23:27:23 -07002892 ReadCapdata_struct *buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002893 int return_code;
scameron@beardog.cca.cpqcorp.netb57695f2009-06-08 16:02:17 -05002894 unsigned char scsi3addr[8];
Mariusz Kozlowski1aebe182007-08-11 22:34:29 +02002895
2896 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
2897 if (!buf) {
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05002898 dev_warn(&h->pdev->dev, "out of memory\n");
Mike Miller (OS Dev)00988a32006-09-30 23:27:23 -07002899 return;
2900 }
Mariusz Kozlowski1aebe182007-08-11 22:34:29 +02002901
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05002902 log_unit_to_scsi3addr(h, scsi3addr, logvol);
2903 return_code = sendcmd_withirq(h, CCISS_READ_CAPACITY, buf,
Stephen M. Cameron7b838bd2009-11-12 12:49:30 -06002904 sizeof(ReadCapdata_struct), 0, scsi3addr, TYPE_CMD);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002905 if (return_code == IO_OK) {
Al Viro4c1f2b32007-03-14 09:19:10 +00002906 *total_size = be32_to_cpu(*(__be32 *) buf->total_size);
2907 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002908 } else { /* read capacity command failed */
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05002909 dev_warn(&h->pdev->dev, "read capacity failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002910 *total_size = 0;
2911 *block_size = BLOCK_SIZE;
2912 }
Mike Miller (OS Dev)00988a32006-09-30 23:27:23 -07002913 kfree(buf);
Mike Miller (OS Dev)00988a32006-09-30 23:27:23 -07002914}
2915
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05002916static void cciss_read_capacity_16(ctlr_info_t *h, int logvol,
Stephen M. Cameron7b838bd2009-11-12 12:49:30 -06002917 sector_t *total_size, unsigned int *block_size)
Mike Miller (OS Dev)00988a32006-09-30 23:27:23 -07002918{
2919 ReadCapdata_struct_16 *buf;
2920 int return_code;
scameron@beardog.cca.cpqcorp.netb57695f2009-06-08 16:02:17 -05002921 unsigned char scsi3addr[8];
Mariusz Kozlowski1aebe182007-08-11 22:34:29 +02002922
2923 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2924 if (!buf) {
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05002925 dev_warn(&h->pdev->dev, "out of memory\n");
Mike Miller (OS Dev)00988a32006-09-30 23:27:23 -07002926 return;
2927 }
Mariusz Kozlowski1aebe182007-08-11 22:34:29 +02002928
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05002929 log_unit_to_scsi3addr(h, scsi3addr, logvol);
2930 return_code = sendcmd_withirq(h, CCISS_READ_CAPACITY_16,
2931 buf, sizeof(ReadCapdata_struct_16),
Stephen M. Cameron7b838bd2009-11-12 12:49:30 -06002932 0, scsi3addr, TYPE_CMD);
Mike Miller (OS Dev)00988a32006-09-30 23:27:23 -07002933 if (return_code == IO_OK) {
Al Viro4c1f2b32007-03-14 09:19:10 +00002934 *total_size = be64_to_cpu(*(__be64 *) buf->total_size);
2935 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
Mike Miller (OS Dev)00988a32006-09-30 23:27:23 -07002936 } else { /* read capacity command failed */
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05002937 dev_warn(&h->pdev->dev, "read capacity failed\n");
Mike Miller (OS Dev)00988a32006-09-30 23:27:23 -07002938 *total_size = 0;
2939 *block_size = BLOCK_SIZE;
2940 }
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05002941 dev_info(&h->pdev->dev, " blocks= %llu block_size= %d\n",
Mike Miller (OS Dev)97c06972007-03-06 01:42:14 -08002942 (unsigned long long)*total_size+1, *block_size);
Mike Miller (OS Dev)00988a32006-09-30 23:27:23 -07002943 kfree(buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002944}
2945
Linus Torvalds1da177e2005-04-16 15:20:36 -07002946static int cciss_revalidate(struct gendisk *disk)
2947{
2948 ctlr_info_t *h = get_host(disk);
2949 drive_info_struct *drv = get_drv(disk);
2950 int logvol;
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002951 int FOUND = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002952 unsigned int block_size;
Mike Miller (OS Dev)00988a32006-09-30 23:27:23 -07002953 sector_t total_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002954 InquiryData_struct *inq_buff = NULL;
2955
Stephen M. Cameron68264e92011-01-19 08:25:02 -07002956 for (logvol = 0; logvol <= h->highest_lun; logvol++) {
Stephen M. Cameron0fc13c82010-12-17 09:01:37 +01002957 if (!h->drv[logvol])
Linus Torvalds453434c2010-12-20 21:21:49 -08002958 continue;
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05002959 if (memcmp(h->drv[logvol]->LunID, drv->LunID,
Stephen M. Cameron39ccf9a2009-09-17 13:48:00 -05002960 sizeof(drv->LunID)) == 0) {
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002961 FOUND = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002962 break;
2963 }
2964 }
2965
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002966 if (!FOUND)
2967 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002968
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002969 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2970 if (inq_buff == NULL) {
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05002971 dev_warn(&h->pdev->dev, "out of memory\n");
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002972 return 1;
2973 }
Mike Miller (OS Dev)00988a32006-09-30 23:27:23 -07002974 if (h->cciss_read == CCISS_READ_10) {
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05002975 cciss_read_capacity(h, logvol,
Mike Miller (OS Dev)00988a32006-09-30 23:27:23 -07002976 &total_size, &block_size);
2977 } else {
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05002978 cciss_read_capacity_16(h, logvol,
Mike Miller (OS Dev)00988a32006-09-30 23:27:23 -07002979 &total_size, &block_size);
2980 }
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05002981 cciss_geometry_inquiry(h, logvol, total_size, block_size,
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002982 inq_buff, drv);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002983
Martin K. Petersene1defc42009-05-22 17:17:49 -04002984 blk_queue_logical_block_size(drv->queue, drv->block_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002985 set_capacity(disk, drv->nr_blocks);
2986
Linus Torvalds1da177e2005-04-16 15:20:36 -07002987 kfree(inq_buff);
2988 return 0;
2989}
2990
2991/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002992 * Map (physical) PCI mem into (virtual) kernel space
2993 */
2994static void __iomem *remap_pci_mem(ulong base, ulong size)
2995{
Bjorn Helgaas7c832832006-06-25 05:49:06 -07002996 ulong page_base = ((ulong) base) & PAGE_MASK;
2997 ulong page_offs = ((ulong) base) - page_base;
2998 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002999
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003000 return page_remapped ? (page_remapped + page_offs) : NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003001}
3002
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003003/*
3004 * Takes jobs of the Q and sends them to the hardware, then puts it on
3005 * the Q to wait for completion.
3006 */
3007static void start_io(ctlr_info_t *h)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003008{
3009 CommandList_struct *c;
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003010
Jens Axboee6e1ee92011-01-10 21:50:33 +01003011 while (!list_empty(&h->reqQ)) {
3012 c = list_entry(h->reqQ.next, CommandList_struct, list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003013 /* can't do anything if fifo is full */
3014 if ((h->access.fifo_full(h))) {
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003015 dev_warn(&h->pdev->dev, "fifo full\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07003016 break;
3017 }
3018
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003019 /* Get the first entry from the Request Q */
Jens Axboe8a3173d2008-11-20 09:46:09 +01003020 removeQ(c);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003021 h->Qdepth--;
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003022
3023 /* Tell the controller execute command */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003024 h->access.submit_command(h, c);
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003025
3026 /* Put job onto the completed Q */
Jens Axboe8a3173d2008-11-20 09:46:09 +01003027 addQ(&h->cmpQ, c);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003028 }
3029}
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003030
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05003031/* Assumes that h->lock is held. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003032/* Zeros out the error record and then resends the command back */
3033/* to the controller */
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003034static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003035{
3036 /* erase the old error information */
3037 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
3038
3039 /* add it to software queue and then send it to the controller */
Jens Axboe8a3173d2008-11-20 09:46:09 +01003040 addQ(&h->reqQ, c);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003041 h->Qdepth++;
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003042 if (h->Qdepth > h->maxQsinceinit)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003043 h->maxQsinceinit = h->Qdepth;
3044
3045 start_io(h);
3046}
Jens Axboea9925a02006-01-09 16:04:06 +01003047
Steve Cameron1a614f52007-10-16 23:27:37 -07003048static inline unsigned int make_status_bytes(unsigned int scsi_status_byte,
3049 unsigned int msg_byte, unsigned int host_byte,
3050 unsigned int driver_byte)
3051{
3052 /* inverse of macros in scsi.h */
3053 return (scsi_status_byte & 0xff) |
3054 ((msg_byte & 0xff) << 8) |
3055 ((host_byte & 0xff) << 16) |
3056 ((driver_byte & 0xff) << 24);
3057}
3058
Mike Miller0a9279c2009-04-02 12:50:55 -07003059static inline int evaluate_target_status(ctlr_info_t *h,
3060 CommandList_struct *cmd, int *retry_cmd)
Mike Miller (OS Dev)03bbfee2007-05-08 00:29:32 -07003061{
3062 unsigned char sense_key;
Steve Cameron1a614f52007-10-16 23:27:37 -07003063 unsigned char status_byte, msg_byte, host_byte, driver_byte;
3064 int error_value;
Mike Miller (OS Dev)03bbfee2007-05-08 00:29:32 -07003065
Mike Miller0a9279c2009-04-02 12:50:55 -07003066 *retry_cmd = 0;
Steve Cameron1a614f52007-10-16 23:27:37 -07003067 /* If we get in here, it means we got "target status", that is, scsi status */
3068 status_byte = cmd->err_info->ScsiStatus;
3069 driver_byte = DRIVER_OK;
3070 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */
3071
Christoph Hellwig33659eb2010-08-07 18:17:56 +02003072 if (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC)
Steve Cameron1a614f52007-10-16 23:27:37 -07003073 host_byte = DID_PASSTHROUGH;
3074 else
3075 host_byte = DID_OK;
3076
3077 error_value = make_status_bytes(status_byte, msg_byte,
3078 host_byte, driver_byte);
3079
3080 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
Christoph Hellwig33659eb2010-08-07 18:17:56 +02003081 if (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC)
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003082 dev_warn(&h->pdev->dev, "cmd %p "
Mike Miller (OS Dev)03bbfee2007-05-08 00:29:32 -07003083 "has SCSI Status 0x%x\n",
3084 cmd, cmd->err_info->ScsiStatus);
Steve Cameron1a614f52007-10-16 23:27:37 -07003085 return error_value;
Mike Miller (OS Dev)03bbfee2007-05-08 00:29:32 -07003086 }
3087
3088 /* check the sense key */
3089 sense_key = 0xf & cmd->err_info->SenseInfo[2];
3090 /* no status or recovered error */
Christoph Hellwig33659eb2010-08-07 18:17:56 +02003091 if (((sense_key == 0x0) || (sense_key == 0x1)) &&
3092 (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC))
Steve Cameron1a614f52007-10-16 23:27:37 -07003093 error_value = 0;
Mike Miller (OS Dev)03bbfee2007-05-08 00:29:32 -07003094
Mike Miller0a9279c2009-04-02 12:50:55 -07003095 if (check_for_unit_attention(h, cmd)) {
Christoph Hellwig33659eb2010-08-07 18:17:56 +02003096 *retry_cmd = !(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC);
Mike Miller0a9279c2009-04-02 12:50:55 -07003097 return 0;
3098 }
3099
Christoph Hellwig33659eb2010-08-07 18:17:56 +02003100 /* Not SG_IO or similar? */
3101 if (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC) {
Steve Cameron1a614f52007-10-16 23:27:37 -07003102 if (error_value != 0)
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003103 dev_warn(&h->pdev->dev, "cmd %p has CHECK CONDITION"
Mike Miller (OS Dev)03bbfee2007-05-08 00:29:32 -07003104 " sense key = 0x%x\n", cmd, sense_key);
Steve Cameron1a614f52007-10-16 23:27:37 -07003105 return error_value;
Mike Miller (OS Dev)03bbfee2007-05-08 00:29:32 -07003106 }
3107
3108 /* SG_IO or similar, copy sense data back */
3109 if (cmd->rq->sense) {
3110 if (cmd->rq->sense_len > cmd->err_info->SenseLen)
3111 cmd->rq->sense_len = cmd->err_info->SenseLen;
3112 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
3113 cmd->rq->sense_len);
3114 } else
3115 cmd->rq->sense_len = 0;
3116
Steve Cameron1a614f52007-10-16 23:27:37 -07003117 return error_value;
Mike Miller (OS Dev)03bbfee2007-05-08 00:29:32 -07003118}
3119
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003120/* checks the status of the job and calls complete buffers to mark all
Jens Axboea9925a02006-01-09 16:04:06 +01003121 * buffers for the completed job. Note that this function does not need
3122 * to hold the hba/queue lock.
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003123 */
3124static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
3125 int timeout)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003126{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003127 int retry_cmd = 0;
Mike Miller (OS Dev)198b7662007-05-08 00:29:34 -07003128 struct request *rq = cmd->rq;
3129
3130 rq->errors = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003131
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003132 if (timeout)
Steve Cameron1a614f52007-10-16 23:27:37 -07003133 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003134
Mike Miller (OS Dev)d38ae162007-05-08 00:29:29 -07003135 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
3136 goto after_error_processing;
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003137
Mike Miller (OS Dev)d38ae162007-05-08 00:29:29 -07003138 switch (cmd->err_info->CommandStatus) {
Mike Miller (OS Dev)d38ae162007-05-08 00:29:29 -07003139 case CMD_TARGET_STATUS:
Mike Miller0a9279c2009-04-02 12:50:55 -07003140 rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
Mike Miller (OS Dev)d38ae162007-05-08 00:29:29 -07003141 break;
3142 case CMD_DATA_UNDERRUN:
Christoph Hellwig33659eb2010-08-07 18:17:56 +02003143 if (cmd->rq->cmd_type == REQ_TYPE_FS) {
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003144 dev_warn(&h->pdev->dev, "cmd %p has"
Mike Miller (OS Dev)03bbfee2007-05-08 00:29:32 -07003145 " completed with data underrun "
3146 "reported\n", cmd);
Tejun Heoc3a4d782009-05-07 22:24:37 +09003147 cmd->rq->resid_len = cmd->err_info->ResidualCnt;
Mike Miller (OS Dev)03bbfee2007-05-08 00:29:32 -07003148 }
Mike Miller (OS Dev)d38ae162007-05-08 00:29:29 -07003149 break;
3150 case CMD_DATA_OVERRUN:
Christoph Hellwig33659eb2010-08-07 18:17:56 +02003151 if (cmd->rq->cmd_type == REQ_TYPE_FS)
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003152 dev_warn(&h->pdev->dev, "cciss: cmd %p has"
Mike Miller (OS Dev)03bbfee2007-05-08 00:29:32 -07003153 " completed with data overrun "
3154 "reported\n", cmd);
Mike Miller (OS Dev)d38ae162007-05-08 00:29:29 -07003155 break;
3156 case CMD_INVALID:
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003157 dev_warn(&h->pdev->dev, "cciss: cmd %p is "
Mike Miller (OS Dev)d38ae162007-05-08 00:29:29 -07003158 "reported invalid\n", cmd);
Steve Cameron1a614f52007-10-16 23:27:37 -07003159 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3160 cmd->err_info->CommandStatus, DRIVER_OK,
Christoph Hellwig33659eb2010-08-07 18:17:56 +02003161 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3162 DID_PASSTHROUGH : DID_ERROR);
Mike Miller (OS Dev)d38ae162007-05-08 00:29:29 -07003163 break;
3164 case CMD_PROTOCOL_ERR:
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003165 dev_warn(&h->pdev->dev, "cciss: cmd %p has "
3166 "protocol error\n", cmd);
Steve Cameron1a614f52007-10-16 23:27:37 -07003167 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3168 cmd->err_info->CommandStatus, DRIVER_OK,
Christoph Hellwig33659eb2010-08-07 18:17:56 +02003169 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3170 DID_PASSTHROUGH : DID_ERROR);
Mike Miller (OS Dev)d38ae162007-05-08 00:29:29 -07003171 break;
3172 case CMD_HARDWARE_ERR:
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003173 dev_warn(&h->pdev->dev, "cciss: cmd %p had "
Mike Miller (OS Dev)d38ae162007-05-08 00:29:29 -07003174 " hardware error\n", cmd);
Steve Cameron1a614f52007-10-16 23:27:37 -07003175 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3176 cmd->err_info->CommandStatus, DRIVER_OK,
Christoph Hellwig33659eb2010-08-07 18:17:56 +02003177 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3178 DID_PASSTHROUGH : DID_ERROR);
Mike Miller (OS Dev)d38ae162007-05-08 00:29:29 -07003179 break;
3180 case CMD_CONNECTION_LOST:
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003181 dev_warn(&h->pdev->dev, "cciss: cmd %p had "
Mike Miller (OS Dev)d38ae162007-05-08 00:29:29 -07003182 "connection lost\n", cmd);
Steve Cameron1a614f52007-10-16 23:27:37 -07003183 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3184 cmd->err_info->CommandStatus, DRIVER_OK,
Christoph Hellwig33659eb2010-08-07 18:17:56 +02003185 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3186 DID_PASSTHROUGH : DID_ERROR);
Mike Miller (OS Dev)d38ae162007-05-08 00:29:29 -07003187 break;
3188 case CMD_ABORTED:
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003189 dev_warn(&h->pdev->dev, "cciss: cmd %p was "
Mike Miller (OS Dev)d38ae162007-05-08 00:29:29 -07003190 "aborted\n", cmd);
Steve Cameron1a614f52007-10-16 23:27:37 -07003191 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3192 cmd->err_info->CommandStatus, DRIVER_OK,
Christoph Hellwig33659eb2010-08-07 18:17:56 +02003193 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3194 DID_PASSTHROUGH : DID_ABORT);
Mike Miller (OS Dev)d38ae162007-05-08 00:29:29 -07003195 break;
3196 case CMD_ABORT_FAILED:
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003197 dev_warn(&h->pdev->dev, "cciss: cmd %p reports "
Mike Miller (OS Dev)d38ae162007-05-08 00:29:29 -07003198 "abort failed\n", cmd);
Steve Cameron1a614f52007-10-16 23:27:37 -07003199 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3200 cmd->err_info->CommandStatus, DRIVER_OK,
Christoph Hellwig33659eb2010-08-07 18:17:56 +02003201 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3202 DID_PASSTHROUGH : DID_ERROR);
Mike Miller (OS Dev)d38ae162007-05-08 00:29:29 -07003203 break;
3204 case CMD_UNSOLICITED_ABORT:
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003205 dev_warn(&h->pdev->dev, "cciss%d: unsolicited "
Mike Miller (OS Dev)d38ae162007-05-08 00:29:29 -07003206 "abort %p\n", h->ctlr, cmd);
3207 if (cmd->retry_count < MAX_CMD_RETRIES) {
3208 retry_cmd = 1;
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003209 dev_warn(&h->pdev->dev, "retrying %p\n", cmd);
Mike Miller (OS Dev)d38ae162007-05-08 00:29:29 -07003210 cmd->retry_count++;
3211 } else
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003212 dev_warn(&h->pdev->dev,
3213 "%p retried too many times\n", cmd);
Steve Cameron1a614f52007-10-16 23:27:37 -07003214 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3215 cmd->err_info->CommandStatus, DRIVER_OK,
Christoph Hellwig33659eb2010-08-07 18:17:56 +02003216 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3217 DID_PASSTHROUGH : DID_ABORT);
Mike Miller (OS Dev)d38ae162007-05-08 00:29:29 -07003218 break;
3219 case CMD_TIMEOUT:
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003220 dev_warn(&h->pdev->dev, "cmd %p timedout\n", cmd);
Steve Cameron1a614f52007-10-16 23:27:37 -07003221 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3222 cmd->err_info->CommandStatus, DRIVER_OK,
Christoph Hellwig33659eb2010-08-07 18:17:56 +02003223 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3224 DID_PASSTHROUGH : DID_ERROR);
Mike Miller (OS Dev)d38ae162007-05-08 00:29:29 -07003225 break;
Stephen M. Cameron6d9a4f92011-03-12 10:02:30 +01003226 case CMD_UNABORTABLE:
3227 dev_warn(&h->pdev->dev, "cmd %p unabortable\n", cmd);
3228 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3229 cmd->err_info->CommandStatus, DRIVER_OK,
3230 cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC ?
3231 DID_PASSTHROUGH : DID_ERROR);
3232 break;
Mike Miller (OS Dev)d38ae162007-05-08 00:29:29 -07003233 default:
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003234 dev_warn(&h->pdev->dev, "cmd %p returned "
Mike Miller (OS Dev)d38ae162007-05-08 00:29:29 -07003235 "unknown status %x\n", cmd,
3236 cmd->err_info->CommandStatus);
Steve Cameron1a614f52007-10-16 23:27:37 -07003237 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3238 cmd->err_info->CommandStatus, DRIVER_OK,
Christoph Hellwig33659eb2010-08-07 18:17:56 +02003239 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3240 DID_PASSTHROUGH : DID_ERROR);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003241 }
Mike Miller (OS Dev)d38ae162007-05-08 00:29:29 -07003242
3243after_error_processing:
3244
Linus Torvalds1da177e2005-04-16 15:20:36 -07003245 /* We need to return this command */
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003246 if (retry_cmd) {
3247 resend_cciss_cmd(h, cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003248 return;
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003249 }
Mike Miller (OS Dev)03bbfee2007-05-08 00:29:32 -07003250 cmd->rq->completion_data = cmd;
Jens Axboea9925a02006-01-09 16:04:06 +01003251 blk_complete_request(cmd->rq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003252}
3253
Mike Miller0c2b3902010-06-02 12:58:00 -07003254static inline u32 cciss_tag_contains_index(u32 tag)
3255{
Mike Miller5e216152010-06-02 12:58:06 -07003256#define DIRECT_LOOKUP_BIT 0x10
Mike Miller0c2b3902010-06-02 12:58:00 -07003257 return tag & DIRECT_LOOKUP_BIT;
3258}
3259
3260static inline u32 cciss_tag_to_index(u32 tag)
3261{
Mike Miller5e216152010-06-02 12:58:06 -07003262#define DIRECT_LOOKUP_SHIFT 5
Mike Miller0c2b3902010-06-02 12:58:00 -07003263 return tag >> DIRECT_LOOKUP_SHIFT;
3264}
3265
Stephen M. Cameron0498cc22011-03-12 10:02:16 +01003266static inline u32 cciss_tag_discard_error_bits(ctlr_info_t *h, u32 tag)
Mike Miller0c2b3902010-06-02 12:58:00 -07003267{
Stephen M. Cameron0498cc22011-03-12 10:02:16 +01003268#define CCISS_PERF_ERROR_BITS ((1 << DIRECT_LOOKUP_SHIFT) - 1)
3269#define CCISS_SIMPLE_ERROR_BITS 0x03
3270 if (likely(h->transMethod & CFGTBL_Trans_Performant))
3271 return tag & ~CCISS_PERF_ERROR_BITS;
3272 return tag & ~CCISS_SIMPLE_ERROR_BITS;
Mike Miller0c2b3902010-06-02 12:58:00 -07003273}
3274
3275static inline void cciss_mark_tag_indexed(u32 *tag)
3276{
3277 *tag |= DIRECT_LOOKUP_BIT;
3278}
3279
3280static inline void cciss_set_tag_index(u32 *tag, u32 index)
3281{
3282 *tag |= (index << DIRECT_LOOKUP_SHIFT);
3283}
3284
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003285/*
3286 * Get a request and submit it to the controller.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003287 */
Jens Axboe165125e2007-07-24 09:28:11 +02003288static void do_cciss_request(struct request_queue *q)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003289{
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003290 ctlr_info_t *h = q->queuedata;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003291 CommandList_struct *c;
Mike Miller (OS Dev)00988a32006-09-30 23:27:23 -07003292 sector_t start_blk;
3293 int seg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003294 struct request *creq;
3295 u64bit temp64;
Don Brace5c07a312009-11-12 12:50:01 -06003296 struct scatterlist *tmp_sg;
3297 SGDescriptor_struct *curr_sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003298 drive_info_struct *drv;
3299 int i, dir;
Don Brace5c07a312009-11-12 12:50:01 -06003300 int sg_index = 0;
3301 int chained = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003302
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003303 queue:
Tejun Heo9934c8c2009-05-08 11:54:16 +09003304 creq = blk_peek_request(q);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003305 if (!creq)
3306 goto startio;
3307
Don Brace5c07a312009-11-12 12:50:01 -06003308 BUG_ON(creq->nr_phys_segments > h->maxsgentries);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003309
Stephen M. Cameron6b4d96b2010-07-19 13:46:43 -05003310 c = cmd_alloc(h);
3311 if (!c)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003312 goto full;
3313
Tejun Heo9934c8c2009-05-08 11:54:16 +09003314 blk_start_request(creq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003315
Don Brace5c07a312009-11-12 12:50:01 -06003316 tmp_sg = h->scatter_list[c->cmdindex];
Linus Torvalds1da177e2005-04-16 15:20:36 -07003317 spin_unlock_irq(q->queue_lock);
3318
3319 c->cmd_type = CMD_RWREQ;
3320 c->rq = creq;
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003321
3322 /* fill in the request */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003323 drv = creq->rq_disk->private_data;
dann frazierb0284612010-02-17 16:53:31 -07003324 c->Header.ReplyQueue = 0; /* unused in simple mode */
Mike Miller33079b22005-09-13 01:25:22 -07003325 /* got command from pool, so use the command block index instead */
3326 /* for direct lookups. */
3327 /* The first 2 bits are reserved for controller error reporting. */
Mike Miller0c2b3902010-06-02 12:58:00 -07003328 cciss_set_tag_index(&c->Header.Tag.lower, c->cmdindex);
3329 cciss_mark_tag_indexed(&c->Header.Tag.lower);
Stephen M. Cameron39ccf9a2009-09-17 13:48:00 -05003330 memcpy(&c->Header.LUN, drv->LunID, sizeof(drv->LunID));
dann frazierb0284612010-02-17 16:53:31 -07003331 c->Request.CDBLen = 10; /* 12 byte commands not in FW yet; */
3332 c->Request.Type.Type = TYPE_CMD; /* It is a command. */
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003333 c->Request.Type.Attribute = ATTR_SIMPLE;
3334 c->Request.Type.Direction =
Mike Millera52de242006-12-18 11:00:14 +01003335 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
dann frazierb0284612010-02-17 16:53:31 -07003336 c->Request.Timeout = 0; /* Don't time out */
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003337 c->Request.CDB[0] =
Mike Miller (OS Dev)00988a32006-09-30 23:27:23 -07003338 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
Tejun Heo83096eb2009-05-07 22:24:39 +09003339 start_blk = blk_rq_pos(creq);
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003340 dev_dbg(&h->pdev->dev, "sector =%d nr_sectors=%d\n",
Tejun Heo83096eb2009-05-07 22:24:39 +09003341 (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq));
Don Brace5c07a312009-11-12 12:50:01 -06003342 sg_init_table(tmp_sg, h->maxsgentries);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003343 seg = blk_rq_map_sg(q, creq, tmp_sg);
3344
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003345 /* get the DMA records for the setup */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003346 if (c->Request.Type.Direction == XFER_READ)
3347 dir = PCI_DMA_FROMDEVICE;
3348 else
3349 dir = PCI_DMA_TODEVICE;
3350
Don Brace5c07a312009-11-12 12:50:01 -06003351 curr_sg = c->SG;
3352 sg_index = 0;
3353 chained = 0;
3354
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003355 for (i = 0; i < seg; i++) {
Don Brace5c07a312009-11-12 12:50:01 -06003356 if (((sg_index+1) == (h->max_cmd_sgentries)) &&
3357 !chained && ((seg - i) > 1)) {
Don Brace5c07a312009-11-12 12:50:01 -06003358 /* Point to next chain block. */
Stephen M. Camerondccc9b52010-02-26 16:01:27 -06003359 curr_sg = h->cmd_sg_list[c->cmdindex];
Don Brace5c07a312009-11-12 12:50:01 -06003360 sg_index = 0;
3361 chained = 1;
3362 }
3363 curr_sg[sg_index].Len = tmp_sg[i].length;
Jens Axboe45711f12007-10-22 21:19:53 +02003364 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]),
Don Brace5c07a312009-11-12 12:50:01 -06003365 tmp_sg[i].offset,
3366 tmp_sg[i].length, dir);
3367 curr_sg[sg_index].Addr.lower = temp64.val32.lower;
3368 curr_sg[sg_index].Addr.upper = temp64.val32.upper;
3369 curr_sg[sg_index].Ext = 0; /* we are not chaining */
Don Brace5c07a312009-11-12 12:50:01 -06003370 ++sg_index;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003371 }
Stephen M. Camerond45033e2010-02-26 16:01:37 -06003372 if (chained)
3373 cciss_map_sg_chain_block(h, c, h->cmd_sg_list[c->cmdindex],
3374 (seg - (h->max_cmd_sgentries - 1)) *
3375 sizeof(SGDescriptor_struct));
Don Brace5c07a312009-11-12 12:50:01 -06003376
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003377 /* track how many SG entries we are using */
3378 if (seg > h->maxSG)
3379 h->maxSG = seg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003380
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003381 dev_dbg(&h->pdev->dev, "Submitting %u sectors in %d segments "
Don Brace5c07a312009-11-12 12:50:01 -06003382 "chained[%d]\n",
3383 blk_rq_sectors(creq), seg, chained);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003384
Mike Miller5e216152010-06-02 12:58:06 -07003385 c->Header.SGTotal = seg + chained;
3386 if (seg <= h->max_cmd_sgentries)
3387 c->Header.SGList = c->Header.SGTotal;
3388 else
Don Brace5c07a312009-11-12 12:50:01 -06003389 c->Header.SGList = h->max_cmd_sgentries;
Mike Miller5e216152010-06-02 12:58:06 -07003390 set_performant_mode(h, c);
Don Brace5c07a312009-11-12 12:50:01 -06003391
Christoph Hellwig33659eb2010-08-07 18:17:56 +02003392 if (likely(creq->cmd_type == REQ_TYPE_FS)) {
Mike Miller (OS Dev)03bbfee2007-05-08 00:29:32 -07003393 if(h->cciss_read == CCISS_READ_10) {
3394 c->Request.CDB[1] = 0;
dann frazierb0284612010-02-17 16:53:31 -07003395 c->Request.CDB[2] = (start_blk >> 24) & 0xff; /* MSB */
Mike Miller (OS Dev)03bbfee2007-05-08 00:29:32 -07003396 c->Request.CDB[3] = (start_blk >> 16) & 0xff;
3397 c->Request.CDB[4] = (start_blk >> 8) & 0xff;
3398 c->Request.CDB[5] = start_blk & 0xff;
dann frazierb0284612010-02-17 16:53:31 -07003399 c->Request.CDB[6] = 0; /* (sect >> 24) & 0xff; MSB */
Tejun Heo83096eb2009-05-07 22:24:39 +09003400 c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff;
3401 c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff;
Mike Miller (OS Dev)03bbfee2007-05-08 00:29:32 -07003402 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
3403 } else {
Randy Dunlap582539e2008-02-06 01:36:54 -08003404 u32 upper32 = upper_32_bits(start_blk);
3405
Mike Miller (OS Dev)03bbfee2007-05-08 00:29:32 -07003406 c->Request.CDBLen = 16;
3407 c->Request.CDB[1]= 0;
dann frazierb0284612010-02-17 16:53:31 -07003408 c->Request.CDB[2]= (upper32 >> 24) & 0xff; /* MSB */
Randy Dunlap582539e2008-02-06 01:36:54 -08003409 c->Request.CDB[3]= (upper32 >> 16) & 0xff;
3410 c->Request.CDB[4]= (upper32 >> 8) & 0xff;
3411 c->Request.CDB[5]= upper32 & 0xff;
Mike Miller (OS Dev)03bbfee2007-05-08 00:29:32 -07003412 c->Request.CDB[6]= (start_blk >> 24) & 0xff;
3413 c->Request.CDB[7]= (start_blk >> 16) & 0xff;
3414 c->Request.CDB[8]= (start_blk >> 8) & 0xff;
3415 c->Request.CDB[9]= start_blk & 0xff;
Tejun Heo83096eb2009-05-07 22:24:39 +09003416 c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff;
3417 c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff;
3418 c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff;
3419 c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff;
Mike Miller (OS Dev)03bbfee2007-05-08 00:29:32 -07003420 c->Request.CDB[14] = c->Request.CDB[15] = 0;
3421 }
Christoph Hellwig33659eb2010-08-07 18:17:56 +02003422 } else if (creq->cmd_type == REQ_TYPE_BLOCK_PC) {
Mike Miller (OS Dev)03bbfee2007-05-08 00:29:32 -07003423 c->Request.CDBLen = creq->cmd_len;
3424 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
Mike Miller (OS Dev)00988a32006-09-30 23:27:23 -07003425 } else {
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003426 dev_warn(&h->pdev->dev, "bad request type %d\n",
3427 creq->cmd_type);
Mike Miller (OS Dev)03bbfee2007-05-08 00:29:32 -07003428 BUG();
Mike Miller (OS Dev)00988a32006-09-30 23:27:23 -07003429 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003430
3431 spin_lock_irq(q->queue_lock);
3432
Jens Axboe8a3173d2008-11-20 09:46:09 +01003433 addQ(&h->reqQ, c);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003434 h->Qdepth++;
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003435 if (h->Qdepth > h->maxQsinceinit)
3436 h->maxQsinceinit = h->Qdepth;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003437
3438 goto queue;
Mike Miller (OS Dev)00988a32006-09-30 23:27:23 -07003439full:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003440 blk_stop_queue(q);
Mike Miller (OS Dev)00988a32006-09-30 23:27:23 -07003441startio:
Linus Torvalds1da177e2005-04-16 15:20:36 -07003442 /* We will already have the driver lock here so not need
3443 * to lock it.
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003444 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003445 start_io(h);
3446}
3447
mike.miller@hp.com3da8b712005-11-04 12:30:37 -06003448static inline unsigned long get_next_completion(ctlr_info_t *h)
3449{
mike.miller@hp.com3da8b712005-11-04 12:30:37 -06003450 return h->access.command_completed(h);
mike.miller@hp.com3da8b712005-11-04 12:30:37 -06003451}
3452
3453static inline int interrupt_pending(ctlr_info_t *h)
3454{
mike.miller@hp.com3da8b712005-11-04 12:30:37 -06003455 return h->access.intr_pending(h);
mike.miller@hp.com3da8b712005-11-04 12:30:37 -06003456}
3457
3458static inline long interrupt_not_for_us(ctlr_info_t *h)
3459{
Stephen M. Cameron81125862010-07-19 13:46:54 -05003460 return ((h->access.intr_pending(h) == 0) ||
Mike Miller2cf3af12010-06-02 12:58:02 -07003461 (h->interrupts_enabled == 0));
mike.miller@hp.com3da8b712005-11-04 12:30:37 -06003462}
3463
Mike Miller0c2b3902010-06-02 12:58:00 -07003464static inline int bad_tag(ctlr_info_t *h, u32 tag_index,
3465 u32 raw_tag)
3466{
3467 if (unlikely(tag_index >= h->nr_cmds)) {
3468 dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag);
3469 return 1;
3470 }
3471 return 0;
3472}
3473
3474static inline void finish_cmd(ctlr_info_t *h, CommandList_struct *c,
3475 u32 raw_tag)
3476{
3477 removeQ(c);
3478 if (likely(c->cmd_type == CMD_RWREQ))
3479 complete_command(h, c, 0);
3480 else if (c->cmd_type == CMD_IOCTL_PEND)
3481 complete(c->waiting);
3482#ifdef CONFIG_CISS_SCSI_TAPE
3483 else if (c->cmd_type == CMD_SCSI)
3484 complete_scsi_command(c, 0, raw_tag);
3485#endif
3486}
3487
Mike Miller29979a72010-06-11 13:13:35 +02003488static inline u32 next_command(ctlr_info_t *h)
3489{
3490 u32 a;
3491
Stephen M. Cameron0498cc22011-03-12 10:02:16 +01003492 if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant)))
Mike Miller29979a72010-06-11 13:13:35 +02003493 return h->access.command_completed(h);
3494
3495 if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) {
3496 a = *(h->reply_pool_head); /* Next cmd in ring buffer */
3497 (h->reply_pool_head)++;
3498 h->commands_outstanding--;
3499 } else {
3500 a = FIFO_EMPTY;
3501 }
3502 /* Check for wraparound */
3503 if (h->reply_pool_head == (h->reply_pool + h->max_commands)) {
3504 h->reply_pool_head = h->reply_pool;
3505 h->reply_pool_wraparound ^= 1;
3506 }
3507 return a;
3508}
3509
Mike Miller0c2b3902010-06-02 12:58:00 -07003510/* process completion of an indexed ("direct lookup") command */
3511static inline u32 process_indexed_cmd(ctlr_info_t *h, u32 raw_tag)
3512{
3513 u32 tag_index;
3514 CommandList_struct *c;
3515
3516 tag_index = cciss_tag_to_index(raw_tag);
3517 if (bad_tag(h, tag_index, raw_tag))
Mike Miller5e216152010-06-02 12:58:06 -07003518 return next_command(h);
Mike Miller0c2b3902010-06-02 12:58:00 -07003519 c = h->cmd_pool + tag_index;
3520 finish_cmd(h, c, raw_tag);
Mike Miller5e216152010-06-02 12:58:06 -07003521 return next_command(h);
Mike Miller0c2b3902010-06-02 12:58:00 -07003522}
3523
3524/* process completion of a non-indexed command */
3525static inline u32 process_nonindexed_cmd(ctlr_info_t *h, u32 raw_tag)
3526{
Mike Miller0c2b3902010-06-02 12:58:00 -07003527 CommandList_struct *c = NULL;
Mike Miller0c2b3902010-06-02 12:58:00 -07003528 __u32 busaddr_masked, tag_masked;
3529
Stephen M. Cameron0498cc22011-03-12 10:02:16 +01003530 tag_masked = cciss_tag_discard_error_bits(h, raw_tag);
Jens Axboee6e1ee92011-01-10 21:50:33 +01003531 list_for_each_entry(c, &h->cmpQ, list) {
Stephen M. Cameron0498cc22011-03-12 10:02:16 +01003532 busaddr_masked = cciss_tag_discard_error_bits(h, c->busaddr);
Mike Miller0c2b3902010-06-02 12:58:00 -07003533 if (busaddr_masked == tag_masked) {
3534 finish_cmd(h, c, raw_tag);
Mike Miller5e216152010-06-02 12:58:06 -07003535 return next_command(h);
Mike Miller0c2b3902010-06-02 12:58:00 -07003536 }
3537 }
3538 bad_tag(h, h->nr_cmds + 1, raw_tag);
Mike Miller5e216152010-06-02 12:58:06 -07003539 return next_command(h);
Mike Miller0c2b3902010-06-02 12:58:00 -07003540}
3541
Stephen M. Cameron5afe2782011-05-03 14:53:52 -05003542/* Some controllers, like p400, will give us one interrupt
3543 * after a soft reset, even if we turned interrupts off.
3544 * Only need to check for this in the cciss_xxx_discard_completions
3545 * functions.
3546 */
3547static int ignore_bogus_interrupt(ctlr_info_t *h)
3548{
3549 if (likely(!reset_devices))
3550 return 0;
3551
3552 if (likely(h->interrupts_enabled))
3553 return 0;
3554
3555 dev_info(&h->pdev->dev, "Received interrupt while interrupts disabled "
3556 "(known firmware bug.) Ignoring.\n");
3557
3558 return 1;
3559}
3560
3561static irqreturn_t cciss_intx_discard_completions(int irq, void *dev_id)
3562{
3563 ctlr_info_t *h = dev_id;
3564 unsigned long flags;
3565 u32 raw_tag;
3566
3567 if (ignore_bogus_interrupt(h))
3568 return IRQ_NONE;
3569
3570 if (interrupt_not_for_us(h))
3571 return IRQ_NONE;
3572 spin_lock_irqsave(&h->lock, flags);
3573 while (interrupt_pending(h)) {
3574 raw_tag = get_next_completion(h);
3575 while (raw_tag != FIFO_EMPTY)
3576 raw_tag = next_command(h);
3577 }
3578 spin_unlock_irqrestore(&h->lock, flags);
3579 return IRQ_HANDLED;
3580}
3581
3582static irqreturn_t cciss_msix_discard_completions(int irq, void *dev_id)
3583{
3584 ctlr_info_t *h = dev_id;
3585 unsigned long flags;
3586 u32 raw_tag;
3587
3588 if (ignore_bogus_interrupt(h))
3589 return IRQ_NONE;
3590
3591 spin_lock_irqsave(&h->lock, flags);
3592 raw_tag = get_next_completion(h);
3593 while (raw_tag != FIFO_EMPTY)
3594 raw_tag = next_command(h);
3595 spin_unlock_irqrestore(&h->lock, flags);
3596 return IRQ_HANDLED;
3597}
3598
Mike Miller0c2b3902010-06-02 12:58:00 -07003599static irqreturn_t do_cciss_intx(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003600{
3601 ctlr_info_t *h = dev_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003602 unsigned long flags;
Mike Miller0c2b3902010-06-02 12:58:00 -07003603 u32 raw_tag;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003604
mike.miller@hp.com3da8b712005-11-04 12:30:37 -06003605 if (interrupt_not_for_us(h))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003606 return IRQ_NONE;
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05003607 spin_lock_irqsave(&h->lock, flags);
mike.miller@hp.com3da8b712005-11-04 12:30:37 -06003608 while (interrupt_pending(h)) {
Mike Miller0c2b3902010-06-02 12:58:00 -07003609 raw_tag = get_next_completion(h);
3610 while (raw_tag != FIFO_EMPTY) {
3611 if (cciss_tag_contains_index(raw_tag))
3612 raw_tag = process_indexed_cmd(h, raw_tag);
3613 else
3614 raw_tag = process_nonindexed_cmd(h, raw_tag);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003615 }
3616 }
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05003617 spin_unlock_irqrestore(&h->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003618 return IRQ_HANDLED;
3619}
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003620
Mike Miller0c2b3902010-06-02 12:58:00 -07003621/* Add a second interrupt handler for MSI/MSI-X mode. In this mode we never
3622 * check the interrupt pending register because it is not set.
3623 */
3624static irqreturn_t do_cciss_msix_intr(int irq, void *dev_id)
3625{
3626 ctlr_info_t *h = dev_id;
3627 unsigned long flags;
3628 u32 raw_tag;
3629
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05003630 spin_lock_irqsave(&h->lock, flags);
Mike Miller0c2b3902010-06-02 12:58:00 -07003631 raw_tag = get_next_completion(h);
3632 while (raw_tag != FIFO_EMPTY) {
3633 if (cciss_tag_contains_index(raw_tag))
3634 raw_tag = process_indexed_cmd(h, raw_tag);
3635 else
3636 raw_tag = process_nonindexed_cmd(h, raw_tag);
3637 }
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05003638 spin_unlock_irqrestore(&h->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003639 return IRQ_HANDLED;
3640}
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003641
Andrew Pattersonb368c9d2009-09-17 13:46:58 -05003642/**
3643 * add_to_scan_list() - add controller to rescan queue
3644 * @h: Pointer to the controller.
3645 *
3646 * Adds the controller to the rescan queue if not already on the queue.
3647 *
3648 * returns 1 if added to the queue, 0 if skipped (could be on the
3649 * queue already, or the controller could be initializing or shutting
3650 * down).
3651 **/
3652static int add_to_scan_list(struct ctlr_info *h)
3653{
3654 struct ctlr_info *test_h;
3655 int found = 0;
3656 int ret = 0;
3657
3658 if (h->busy_initializing)
3659 return 0;
3660
3661 if (!mutex_trylock(&h->busy_shutting_down))
3662 return 0;
3663
3664 mutex_lock(&scan_mutex);
3665 list_for_each_entry(test_h, &scan_q, scan_list) {
3666 if (test_h == h) {
3667 found = 1;
3668 break;
3669 }
3670 }
3671 if (!found && !h->busy_scanning) {
3672 INIT_COMPLETION(h->scan_wait);
3673 list_add_tail(&h->scan_list, &scan_q);
3674 ret = 1;
3675 }
3676 mutex_unlock(&scan_mutex);
3677 mutex_unlock(&h->busy_shutting_down);
3678
3679 return ret;
3680}
3681
3682/**
3683 * remove_from_scan_list() - remove controller from rescan queue
3684 * @h: Pointer to the controller.
3685 *
3686 * Removes the controller from the rescan queue if present. Blocks if
Stephen M. Cameronfd8489c2009-11-12 12:49:19 -06003687 * the controller is currently conducting a rescan. The controller
3688 * can be in one of three states:
3689 * 1. Doesn't need a scan
3690 * 2. On the scan list, but not scanning yet (we remove it)
3691 * 3. Busy scanning (and not on the list). In this case we want to wait for
3692 * the scan to complete to make sure the scanning thread for this
3693 * controller is completely idle.
Andrew Pattersonb368c9d2009-09-17 13:46:58 -05003694 **/
3695static void remove_from_scan_list(struct ctlr_info *h)
3696{
3697 struct ctlr_info *test_h, *tmp_h;
Andrew Pattersonb368c9d2009-09-17 13:46:58 -05003698
3699 mutex_lock(&scan_mutex);
3700 list_for_each_entry_safe(test_h, tmp_h, &scan_q, scan_list) {
Stephen M. Cameronfd8489c2009-11-12 12:49:19 -06003701 if (test_h == h) { /* state 2. */
Andrew Pattersonb368c9d2009-09-17 13:46:58 -05003702 list_del(&h->scan_list);
3703 complete_all(&h->scan_wait);
3704 mutex_unlock(&scan_mutex);
3705 return;
3706 }
3707 }
Stephen M. Cameronfd8489c2009-11-12 12:49:19 -06003708 if (h->busy_scanning) { /* state 3. */
3709 mutex_unlock(&scan_mutex);
Andrew Pattersonb368c9d2009-09-17 13:46:58 -05003710 wait_for_completion(&h->scan_wait);
Stephen M. Cameronfd8489c2009-11-12 12:49:19 -06003711 } else { /* state 1, nothing to do. */
3712 mutex_unlock(&scan_mutex);
3713 }
Andrew Pattersonb368c9d2009-09-17 13:46:58 -05003714}
3715
3716/**
3717 * scan_thread() - kernel thread used to rescan controllers
3718 * @data: Ignored.
3719 *
3720 * A kernel thread used scan for drive topology changes on
3721 * controllers. The thread processes only one controller at a time
3722 * using a queue. Controllers are added to the queue using
3723 * add_to_scan_list() and removed from the queue either after done
3724 * processing or using remove_from_scan_list().
3725 *
3726 * returns 0.
3727 **/
Mike Miller0a9279c2009-04-02 12:50:55 -07003728static int scan_thread(void *data)
3729{
Andrew Pattersonb368c9d2009-09-17 13:46:58 -05003730 struct ctlr_info *h;
Mike Miller0a9279c2009-04-02 12:50:55 -07003731
Andrew Pattersonb368c9d2009-09-17 13:46:58 -05003732 while (1) {
3733 set_current_state(TASK_INTERRUPTIBLE);
3734 schedule();
Mike Miller0a9279c2009-04-02 12:50:55 -07003735 if (kthread_should_stop())
3736 break;
Andrew Pattersonb368c9d2009-09-17 13:46:58 -05003737
3738 while (1) {
3739 mutex_lock(&scan_mutex);
3740 if (list_empty(&scan_q)) {
3741 mutex_unlock(&scan_mutex);
3742 break;
3743 }
3744
3745 h = list_entry(scan_q.next,
3746 struct ctlr_info,
3747 scan_list);
3748 list_del(&h->scan_list);
3749 h->busy_scanning = 1;
3750 mutex_unlock(&scan_mutex);
3751
Stephen M. Camerond06dfbd2009-11-12 12:49:50 -06003752 rebuild_lun_table(h, 0, 0);
3753 complete_all(&h->scan_wait);
3754 mutex_lock(&scan_mutex);
3755 h->busy_scanning = 0;
3756 mutex_unlock(&scan_mutex);
Andrew Pattersonb368c9d2009-09-17 13:46:58 -05003757 }
Mike Miller0a9279c2009-04-02 12:50:55 -07003758 }
Andrew Pattersonb368c9d2009-09-17 13:46:58 -05003759
Mike Miller0a9279c2009-04-02 12:50:55 -07003760 return 0;
3761}
3762
3763static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
3764{
3765 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
3766 return 0;
3767
3768 switch (c->err_info->SenseInfo[12]) {
3769 case STATE_CHANGED:
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003770 dev_warn(&h->pdev->dev, "a state change "
3771 "detected, command retried\n");
Mike Miller0a9279c2009-04-02 12:50:55 -07003772 return 1;
3773 break;
3774 case LUN_FAILED:
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003775 dev_warn(&h->pdev->dev, "LUN failure "
3776 "detected, action required\n");
Mike Miller0a9279c2009-04-02 12:50:55 -07003777 return 1;
3778 break;
3779 case REPORT_LUNS_CHANGED:
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003780 dev_warn(&h->pdev->dev, "report LUN data changed\n");
Stephen M. Cameronda002182009-11-12 12:49:55 -06003781 /*
3782 * Here, we could call add_to_scan_list and wake up the scan thread,
3783 * except that it's quite likely that we will get more than one
3784 * REPORT_LUNS_CHANGED condition in quick succession, which means
3785 * that those which occur after the first one will likely happen
3786 * *during* the scan_thread's rescan. And the rescan code is not
3787 * robust enough to restart in the middle, undoing what it has already
3788 * done, and it's not clear that it's even possible to do this, since
3789 * part of what it does is notify the block layer, which starts
3790 * doing it's own i/o to read partition tables and so on, and the
3791 * driver doesn't have visibility to know what might need undoing.
3792 * In any event, if possible, it is horribly complicated to get right
3793 * so we just don't do it for now.
3794 *
3795 * Note: this REPORT_LUNS_CHANGED condition only occurs on the MSA2012.
3796 */
Mike Miller0a9279c2009-04-02 12:50:55 -07003797 return 1;
3798 break;
3799 case POWER_OR_RESET:
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003800 dev_warn(&h->pdev->dev,
3801 "a power on or device reset detected\n");
Mike Miller0a9279c2009-04-02 12:50:55 -07003802 return 1;
3803 break;
3804 case UNIT_ATTENTION_CLEARED:
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003805 dev_warn(&h->pdev->dev,
3806 "unit attention cleared by another initiator\n");
Mike Miller0a9279c2009-04-02 12:50:55 -07003807 return 1;
3808 break;
3809 default:
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003810 dev_warn(&h->pdev->dev, "unknown unit attention detected\n");
3811 return 1;
Mike Miller0a9279c2009-04-02 12:50:55 -07003812 }
3813}
3814
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003815/*
Bjorn Helgaasd14c4ab2006-06-25 05:49:04 -07003816 * We cannot read the structure directly, for portability we must use
Linus Torvalds1da177e2005-04-16 15:20:36 -07003817 * the io functions.
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003818 * This is for debug only.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003819 */
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003820static void print_cfg_table(ctlr_info_t *h)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003821{
3822 int i;
3823 char temp_name[17];
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003824 CfgTable_struct *tb = h->cfgtable;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003825
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003826 dev_dbg(&h->pdev->dev, "Controller Configuration information\n");
3827 dev_dbg(&h->pdev->dev, "------------------------------------\n");
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003828 for (i = 0; i < 4; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003829 temp_name[i] = readb(&(tb->Signature[i]));
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003830 temp_name[4] = '\0';
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003831 dev_dbg(&h->pdev->dev, " Signature = %s\n", temp_name);
3832 dev_dbg(&h->pdev->dev, " Spec Number = %d\n",
3833 readl(&(tb->SpecValence)));
3834 dev_dbg(&h->pdev->dev, " Transport methods supported = 0x%x\n",
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003835 readl(&(tb->TransportSupport)));
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003836 dev_dbg(&h->pdev->dev, " Transport methods active = 0x%x\n",
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003837 readl(&(tb->TransportActive)));
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003838 dev_dbg(&h->pdev->dev, " Requested transport Method = 0x%x\n",
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003839 readl(&(tb->HostWrite.TransportRequest)));
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003840 dev_dbg(&h->pdev->dev, " Coalesce Interrupt Delay = 0x%x\n",
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003841 readl(&(tb->HostWrite.CoalIntDelay)));
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003842 dev_dbg(&h->pdev->dev, " Coalesce Interrupt Count = 0x%x\n",
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003843 readl(&(tb->HostWrite.CoalIntCount)));
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003844 dev_dbg(&h->pdev->dev, " Max outstanding commands = 0x%d\n",
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003845 readl(&(tb->CmdsOutMax)));
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003846 dev_dbg(&h->pdev->dev, " Bus Types = 0x%x\n",
3847 readl(&(tb->BusTypes)));
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003848 for (i = 0; i < 16; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003849 temp_name[i] = readb(&(tb->ServerName[i]));
3850 temp_name[16] = '\0';
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003851 dev_dbg(&h->pdev->dev, " Server Name = %s\n", temp_name);
3852 dev_dbg(&h->pdev->dev, " Heartbeat Counter = 0x%x\n\n\n",
3853 readl(&(tb->HeartBeat)));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003854}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003855
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003856static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003857{
3858 int i, offset, mem_type, bar_type;
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003859 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003860 return 0;
3861 offset = 0;
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003862 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3863 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003864 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3865 offset += 4;
3866 else {
3867 mem_type = pci_resource_flags(pdev, i) &
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003868 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003869 switch (mem_type) {
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003870 case PCI_BASE_ADDRESS_MEM_TYPE_32:
3871 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3872 offset += 4; /* 32 bit */
3873 break;
3874 case PCI_BASE_ADDRESS_MEM_TYPE_64:
3875 offset += 8;
3876 break;
3877 default: /* reserved in PCI 2.2 */
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05003878 dev_warn(&pdev->dev,
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003879 "Base address is invalid\n");
3880 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003881 break;
3882 }
3883 }
Bjorn Helgaas7c832832006-06-25 05:49:06 -07003884 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3885 return i + 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003886 }
3887 return -1;
3888}
3889
Mike Miller5e216152010-06-02 12:58:06 -07003890/* Fill in bucket_map[], given nsgs (the max number of
3891 * scatter gather elements supported) and bucket[],
3892 * which is an array of 8 integers. The bucket[] array
3893 * contains 8 different DMA transfer sizes (in 16
3894 * byte increments) which the controller uses to fetch
3895 * commands. This function fills in bucket_map[], which
3896 * maps a given number of scatter gather elements to one of
3897 * the 8 DMA transfer sizes. The point of it is to allow the
3898 * controller to only do as much DMA as needed to fetch the
3899 * command, with the DMA transfer size encoded in the lower
3900 * bits of the command address.
3901 */
3902static void calc_bucket_map(int bucket[], int num_buckets,
3903 int nsgs, int *bucket_map)
3904{
3905 int i, j, b, size;
3906
3907 /* even a command with 0 SGs requires 4 blocks */
3908#define MINIMUM_TRANSFER_BLOCKS 4
3909#define NUM_BUCKETS 8
3910 /* Note, bucket_map must have nsgs+1 entries. */
3911 for (i = 0; i <= nsgs; i++) {
3912 /* Compute size of a command with i SG entries */
3913 size = i + MINIMUM_TRANSFER_BLOCKS;
3914 b = num_buckets; /* Assume the biggest bucket */
3915 /* Find the bucket that is just big enough */
3916 for (j = 0; j < 8; j++) {
3917 if (bucket[j] >= size) {
3918 b = j;
3919 break;
3920 }
3921 }
3922 /* for a command with i SG entries, use bucket b. */
3923 bucket_map[i] = b;
3924 }
3925}
3926
Greg Kroah-Hartman8d85fce2012-12-21 15:13:49 -08003927static void cciss_wait_for_mode_change_ack(ctlr_info_t *h)
Stephen M. Cameron0f8a6a12010-07-19 13:46:01 -05003928{
3929 int i;
3930
3931 /* under certain very rare conditions, this can take awhile.
3932 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3933 * as we enter this code.) */
3934 for (i = 0; i < MAX_CONFIG_WAIT; i++) {
3935 if (!(readl(h->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3936 break;
Stephen M. Cameron332c2f82010-10-22 14:21:22 -05003937 usleep_range(10000, 20000);
Stephen M. Cameron0f8a6a12010-07-19 13:46:01 -05003938 }
3939}
3940
Greg Kroah-Hartman8d85fce2012-12-21 15:13:49 -08003941static void cciss_enter_performant_mode(ctlr_info_t *h, u32 use_short_tags)
Mike Miller5e216152010-06-02 12:58:06 -07003942{
Stephen M. Cameronb9933132010-07-19 13:46:07 -05003943 /* This is a bit complicated. There are 8 registers on
3944 * the controller which we write to to tell it 8 different
3945 * sizes of commands which there may be. It's a way of
3946 * reducing the DMA done to fetch each command. Encoded into
3947 * each command's tag are 3 bits which communicate to the controller
3948 * which of the eight sizes that command fits within. The size of
3949 * each command depends on how many scatter gather entries there are.
3950 * Each SG entry requires 16 bytes. The eight registers are programmed
3951 * with the number of 16-byte blocks a command of that size requires.
3952 * The smallest command possible requires 5 such 16 byte blocks.
3953 * the largest command possible requires MAXSGENTRIES + 4 16-byte
3954 * blocks. Note, this only extends to the SG entries contained
3955 * within the command block, and does not extend to chained blocks
3956 * of SG elements. bft[] contains the eight values we write to
3957 * the registers. They are not evenly distributed, but have more
3958 * sizes for small commands, and fewer sizes for larger commands.
3959 */
Mike Miller5e216152010-06-02 12:58:06 -07003960 __u32 trans_offset;
Stephen M. Cameronb9933132010-07-19 13:46:07 -05003961 int bft[8] = { 5, 6, 8, 10, 12, 20, 28, MAXSGENTRIES + 4};
Mike Miller5e216152010-06-02 12:58:06 -07003962 /*
3963 * 5 = 1 s/g entry or 4k
3964 * 6 = 2 s/g entry or 8k
3965 * 8 = 4 s/g entry or 16k
3966 * 10 = 6 s/g entry or 24k
3967 */
Mike Miller5e216152010-06-02 12:58:06 -07003968 unsigned long register_value;
Mike Miller5e216152010-06-02 12:58:06 -07003969 BUILD_BUG_ON(28 > MAXSGENTRIES + 4);
3970
Stephen M. Cameronb9933132010-07-19 13:46:07 -05003971 h->reply_pool_wraparound = 1; /* spec: init to 1 */
3972
3973 /* Controller spec: zero out this buffer. */
3974 memset(h->reply_pool, 0, h->max_commands * sizeof(__u64));
3975 h->reply_pool_head = h->reply_pool;
3976
3977 trans_offset = readl(&(h->cfgtable->TransMethodOffset));
3978 calc_bucket_map(bft, ARRAY_SIZE(bft), h->maxsgentries,
3979 h->blockFetchTable);
3980 writel(bft[0], &h->transtable->BlockFetch0);
3981 writel(bft[1], &h->transtable->BlockFetch1);
3982 writel(bft[2], &h->transtable->BlockFetch2);
3983 writel(bft[3], &h->transtable->BlockFetch3);
3984 writel(bft[4], &h->transtable->BlockFetch4);
3985 writel(bft[5], &h->transtable->BlockFetch5);
3986 writel(bft[6], &h->transtable->BlockFetch6);
3987 writel(bft[7], &h->transtable->BlockFetch7);
3988
3989 /* size of controller ring buffer */
3990 writel(h->max_commands, &h->transtable->RepQSize);
3991 writel(1, &h->transtable->RepQCount);
3992 writel(0, &h->transtable->RepQCtrAddrLow32);
3993 writel(0, &h->transtable->RepQCtrAddrHigh32);
3994 writel(h->reply_pool_dhandle, &h->transtable->RepQAddr0Low32);
3995 writel(0, &h->transtable->RepQAddr0High32);
Stephen M. Cameron0498cc22011-03-12 10:02:16 +01003996 writel(CFGTBL_Trans_Performant | use_short_tags,
Stephen M. Cameronb9933132010-07-19 13:46:07 -05003997 &(h->cfgtable->HostWrite.TransportRequest));
3998
3999 writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
4000 cciss_wait_for_mode_change_ack(h);
4001 register_value = readl(&(h->cfgtable->TransportActive));
4002 if (!(register_value & CFGTBL_Trans_Performant))
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05004003 dev_warn(&h->pdev->dev, "cciss: unable to get board into"
Stephen M. Cameronb9933132010-07-19 13:46:07 -05004004 " performant mode\n");
4005}
4006
Greg Kroah-Hartman8d85fce2012-12-21 15:13:49 -08004007static void cciss_put_controller_into_performant_mode(ctlr_info_t *h)
Stephen M. Cameronb9933132010-07-19 13:46:07 -05004008{
4009 __u32 trans_support;
4010
Joseph Handzik13049532011-08-08 11:40:15 +02004011 if (cciss_simple_mode)
4012 return;
4013
Stephen M. Cameronff5f58f02010-07-19 13:45:51 -05004014 dev_dbg(&h->pdev->dev, "Trying to put board into Performant mode\n");
Mike Miller5e216152010-06-02 12:58:06 -07004015 /* Attempt to put controller into performant mode if supported */
4016 /* Does board support performant mode? */
4017 trans_support = readl(&(h->cfgtable->TransportSupport));
4018 if (!(trans_support & PERFORMANT_MODE))
4019 return;
4020
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05004021 dev_dbg(&h->pdev->dev, "Placing controller into performant mode\n");
Mike Miller5e216152010-06-02 12:58:06 -07004022 /* Performant mode demands commands on a 32 byte boundary
4023 * pci_alloc_consistent aligns on page boundarys already.
4024 * Just need to check if divisible by 32
4025 */
4026 if ((sizeof(CommandList_struct) % 32) != 0) {
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05004027 dev_warn(&h->pdev->dev, "%s %d %s\n",
Mike Miller5e216152010-06-02 12:58:06 -07004028 "cciss info: command size[",
4029 (int)sizeof(CommandList_struct),
4030 "] not divisible by 32, no performant mode..\n");
4031 return;
4032 }
4033
4034 /* Performant mode ring buffer and supporting data structures */
4035 h->reply_pool = (__u64 *)pci_alloc_consistent(
4036 h->pdev, h->max_commands * sizeof(__u64),
4037 &(h->reply_pool_dhandle));
4038
4039 /* Need a block fetch table for performant mode */
4040 h->blockFetchTable = kmalloc(((h->maxsgentries+1) *
4041 sizeof(__u32)), GFP_KERNEL);
4042
4043 if ((h->reply_pool == NULL) || (h->blockFetchTable == NULL))
4044 goto clean_up;
4045
Stephen M. Cameron0498cc22011-03-12 10:02:16 +01004046 cciss_enter_performant_mode(h,
4047 trans_support & CFGTBL_Trans_use_short_tags);
Mike Miller5e216152010-06-02 12:58:06 -07004048
4049 /* Change the access methods to the performant access methods */
4050 h->access = SA5_performant_access;
Stephen M. Cameronb9933132010-07-19 13:46:07 -05004051 h->transMethod = CFGTBL_Trans_Performant;
Mike Miller5e216152010-06-02 12:58:06 -07004052
4053 return;
4054clean_up:
4055 kfree(h->blockFetchTable);
4056 if (h->reply_pool)
4057 pci_free_consistent(h->pdev,
4058 h->max_commands * sizeof(__u64),
4059 h->reply_pool,
4060 h->reply_pool_dhandle);
4061 return;
4062
4063} /* cciss_put_controller_into_performant_mode */
4064
Mike Millerfb86a352006-01-08 01:03:50 -08004065/* If MSI/MSI-X is supported by the kernel we will try to enable it on
4066 * controllers that are capable. If not, we use IO-APIC mode.
4067 */
4068
Greg Kroah-Hartman8d85fce2012-12-21 15:13:49 -08004069static void cciss_interrupt_mode(ctlr_info_t *h)
Mike Millerfb86a352006-01-08 01:03:50 -08004070{
4071#ifdef CONFIG_PCI_MSI
Bjorn Helgaas7c832832006-06-25 05:49:06 -07004072 int err;
4073 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
4074 {0, 2}, {0, 3}
4075 };
Mike Millerfb86a352006-01-08 01:03:50 -08004076
4077 /* Some boards advertise MSI but don't really support it */
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05004078 if ((h->board_id == 0x40700E11) || (h->board_id == 0x40800E11) ||
4079 (h->board_id == 0x40820E11) || (h->board_id == 0x40830E11))
Mike Millerfb86a352006-01-08 01:03:50 -08004080 goto default_int_mode;
4081
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05004082 if (pci_find_capability(h->pdev, PCI_CAP_ID_MSIX)) {
4083 err = pci_enable_msix(h->pdev, cciss_msix_entries, 4);
Bjorn Helgaas7c832832006-06-25 05:49:06 -07004084 if (!err) {
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05004085 h->intr[0] = cciss_msix_entries[0].vector;
4086 h->intr[1] = cciss_msix_entries[1].vector;
4087 h->intr[2] = cciss_msix_entries[2].vector;
4088 h->intr[3] = cciss_msix_entries[3].vector;
4089 h->msix_vector = 1;
Bjorn Helgaas7c832832006-06-25 05:49:06 -07004090 return;
4091 }
4092 if (err > 0) {
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05004093 dev_warn(&h->pdev->dev,
4094 "only %d MSI-X vectors available\n", err);
Mike Miller1ecb9c02006-12-06 20:35:13 -08004095 goto default_int_mode;
Bjorn Helgaas7c832832006-06-25 05:49:06 -07004096 } else {
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05004097 dev_warn(&h->pdev->dev,
4098 "MSI-X init failed %d\n", err);
Mike Miller1ecb9c02006-12-06 20:35:13 -08004099 goto default_int_mode;
Bjorn Helgaas7c832832006-06-25 05:49:06 -07004100 }
4101 }
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05004102 if (pci_find_capability(h->pdev, PCI_CAP_ID_MSI)) {
4103 if (!pci_enable_msi(h->pdev))
4104 h->msi_vector = 1;
4105 else
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05004106 dev_warn(&h->pdev->dev, "MSI init failed\n");
Bjorn Helgaas7c832832006-06-25 05:49:06 -07004107 }
Mike Miller1ecb9c02006-12-06 20:35:13 -08004108default_int_mode:
Bjorn Helgaas7c832832006-06-25 05:49:06 -07004109#endif /* CONFIG_PCI_MSI */
Mike Millerfb86a352006-01-08 01:03:50 -08004110 /* if we get here we're going to use the default interrupt mode */
Joseph Handzik13049532011-08-08 11:40:15 +02004111 h->intr[h->intr_mode] = h->pdev->irq;
Mike Millerfb86a352006-01-08 01:03:50 -08004112 return;
4113}
4114
Greg Kroah-Hartman8d85fce2012-12-21 15:13:49 -08004115static int cciss_lookup_board_id(struct pci_dev *pdev, u32 *board_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004116{
Stephen M. Cameron6539fa92010-07-19 13:44:55 -05004117 int i;
4118 u32 subsystem_vendor_id, subsystem_device_id;
Stephen M. Cameron2ec24ff2009-10-13 09:18:22 +02004119
4120 subsystem_vendor_id = pdev->subsystem_vendor;
4121 subsystem_device_id = pdev->subsystem_device;
Stephen M. Cameron6539fa92010-07-19 13:44:55 -05004122 *board_id = ((subsystem_device_id << 16) & 0xffff0000) |
4123 subsystem_vendor_id;
Stephen M. Cameron2ec24ff2009-10-13 09:18:22 +02004124
Mike Millere4292e052013-04-29 11:55:53 -07004125 for (i = 0; i < ARRAY_SIZE(products); i++) {
4126 /* Stand aside for hpsa driver on request */
4127 if (cciss_allow_hpsa)
4128 return -ENODEV;
Stephen M. Cameron6539fa92010-07-19 13:44:55 -05004129 if (*board_id == products[i].board_id)
4130 return i;
Mike Millere4292e052013-04-29 11:55:53 -07004131 }
Stephen M. Cameron6539fa92010-07-19 13:44:55 -05004132 dev_warn(&pdev->dev, "unrecognized board ID: 0x%08x, ignoring.\n",
4133 *board_id);
4134 return -ENODEV;
4135}
4136
Stephen M. Camerondd9c4262010-07-19 13:45:00 -05004137static inline bool cciss_board_disabled(ctlr_info_t *h)
4138{
4139 u16 command;
4140
4141 (void) pci_read_config_word(h->pdev, PCI_COMMAND, &command);
4142 return ((command & PCI_COMMAND_MEMORY) == 0);
4143}
4144
Greg Kroah-Hartman8d85fce2012-12-21 15:13:49 -08004145static int cciss_pci_find_memory_BAR(struct pci_dev *pdev,
4146 unsigned long *memory_bar)
Stephen M. Camerond4748302010-07-19 13:45:10 -05004147{
4148 int i;
4149
4150 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++)
4151 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
4152 /* addressing mode bits already removed */
4153 *memory_bar = pci_resource_start(pdev, i);
4154 dev_dbg(&pdev->dev, "memory BAR = %lx\n",
4155 *memory_bar);
4156 return 0;
4157 }
4158 dev_warn(&pdev->dev, "no memory BAR found\n");
4159 return -ENODEV;
4160}
4161
Greg Kroah-Hartman8d85fce2012-12-21 15:13:49 -08004162static int cciss_wait_for_board_state(struct pci_dev *pdev,
4163 void __iomem *vaddr, int wait_for_ready)
Stephen M. Cameronafa842f2010-10-22 14:21:07 -05004164#define BOARD_READY 1
4165#define BOARD_NOT_READY 0
Stephen M. Camerone99ba132010-07-19 13:45:15 -05004166{
Stephen M. Cameronafa842f2010-10-22 14:21:07 -05004167 int i, iterations;
Stephen M. Camerone99ba132010-07-19 13:45:15 -05004168 u32 scratchpad;
4169
Stephen M. Cameronafa842f2010-10-22 14:21:07 -05004170 if (wait_for_ready)
4171 iterations = CCISS_BOARD_READY_ITERATIONS;
4172 else
4173 iterations = CCISS_BOARD_NOT_READY_ITERATIONS;
4174
4175 for (i = 0; i < iterations; i++) {
4176 scratchpad = readl(vaddr + SA5_SCRATCHPAD_OFFSET);
4177 if (wait_for_ready) {
4178 if (scratchpad == CCISS_FIRMWARE_READY)
4179 return 0;
4180 } else {
4181 if (scratchpad != CCISS_FIRMWARE_READY)
4182 return 0;
4183 }
Stephen M. Camerone99ba132010-07-19 13:45:15 -05004184 msleep(CCISS_BOARD_READY_POLL_INTERVAL_MSECS);
4185 }
Stephen M. Cameronafa842f2010-10-22 14:21:07 -05004186 dev_warn(&pdev->dev, "board not ready, timed out.\n");
Stephen M. Camerone99ba132010-07-19 13:45:15 -05004187 return -ENODEV;
4188}
4189
Greg Kroah-Hartman8d85fce2012-12-21 15:13:49 -08004190static int cciss_find_cfg_addrs(struct pci_dev *pdev, void __iomem *vaddr,
4191 u32 *cfg_base_addr, u64 *cfg_base_addr_index,
4192 u64 *cfg_offset)
Stephen M. Cameron8e93bf62010-07-19 13:46:12 -05004193{
4194 *cfg_base_addr = readl(vaddr + SA5_CTCFG_OFFSET);
4195 *cfg_offset = readl(vaddr + SA5_CTMEM_OFFSET);
4196 *cfg_base_addr &= (u32) 0x0000ffff;
4197 *cfg_base_addr_index = find_PCI_BAR_index(pdev, *cfg_base_addr);
4198 if (*cfg_base_addr_index == -1) {
4199 dev_warn(&pdev->dev, "cannot find cfg_base_addr_index, "
4200 "*cfg_base_addr = 0x%08x\n", *cfg_base_addr);
Stephen M. Cameron2ec24ff2009-10-13 09:18:22 +02004201 return -ENODEV;
4202 }
Stephen M. Cameron8e93bf62010-07-19 13:46:12 -05004203 return 0;
4204}
Linus Torvalds1da177e2005-04-16 15:20:36 -07004205
Greg Kroah-Hartman8d85fce2012-12-21 15:13:49 -08004206static int cciss_find_cfgtables(ctlr_info_t *h)
Stephen M. Cameron4809d092010-07-19 13:45:21 -05004207{
4208 u64 cfg_offset;
4209 u32 cfg_base_addr;
4210 u64 cfg_base_addr_index;
4211 u32 trans_offset;
Stephen M. Cameron8e93bf62010-07-19 13:46:12 -05004212 int rc;
Stephen M. Cameron4809d092010-07-19 13:45:21 -05004213
Stephen M. Cameron8e93bf62010-07-19 13:46:12 -05004214 rc = cciss_find_cfg_addrs(h->pdev, h->vaddr, &cfg_base_addr,
4215 &cfg_base_addr_index, &cfg_offset);
4216 if (rc)
4217 return rc;
Stephen M. Cameron4809d092010-07-19 13:45:21 -05004218 h->cfgtable = remap_pci_mem(pci_resource_start(h->pdev,
Wei Yongjund2b805d2013-03-22 09:11:00 -06004219 cfg_base_addr_index) + cfg_offset, sizeof(*h->cfgtable));
Stephen M. Cameron4809d092010-07-19 13:45:21 -05004220 if (!h->cfgtable)
4221 return -ENOMEM;
Stephen M. Cameron62710ae2011-05-03 14:53:00 -05004222 rc = write_driver_ver_to_cfgtable(h->cfgtable);
4223 if (rc)
4224 return rc;
Stephen M. Cameron4809d092010-07-19 13:45:21 -05004225 /* Find performant mode table. */
Stephen M. Cameron8e93bf62010-07-19 13:46:12 -05004226 trans_offset = readl(&h->cfgtable->TransMethodOffset);
Stephen M. Cameron4809d092010-07-19 13:45:21 -05004227 h->transtable = remap_pci_mem(pci_resource_start(h->pdev,
4228 cfg_base_addr_index)+cfg_offset+trans_offset,
4229 sizeof(*h->transtable));
4230 if (!h->transtable)
4231 return -ENOMEM;
4232 return 0;
4233}
4234
Greg Kroah-Hartman8d85fce2012-12-21 15:13:49 -08004235static void cciss_get_max_perf_mode_cmds(struct ctlr_info *h)
Stephen M. Cameronadfbc1f2010-07-19 13:46:28 -05004236{
4237 h->max_commands = readl(&(h->cfgtable->MaxPerformantModeCommands));
Stephen M. Cameron186fb9c2010-10-22 14:21:17 -05004238
4239 /* Limit commands in memory limited kdump scenario. */
4240 if (reset_devices && h->max_commands > 32)
4241 h->max_commands = 32;
4242
Stephen M. Cameronadfbc1f2010-07-19 13:46:28 -05004243 if (h->max_commands < 16) {
4244 dev_warn(&h->pdev->dev, "Controller reports "
4245 "max supported commands of %d, an obvious lie. "
4246 "Using 16. Ensure that firmware is up to date.\n",
4247 h->max_commands);
4248 h->max_commands = 16;
4249 }
4250}
4251
Stephen M. Cameronafadbf42010-07-19 13:45:31 -05004252/* Interrogate the hardware for some limits:
4253 * max commands, max SG elements without chaining, and with chaining,
4254 * SG chain block size, etc.
4255 */
Greg Kroah-Hartman8d85fce2012-12-21 15:13:49 -08004256static void cciss_find_board_params(ctlr_info_t *h)
Stephen M. Cameronafadbf42010-07-19 13:45:31 -05004257{
Stephen M. Cameronadfbc1f2010-07-19 13:46:28 -05004258 cciss_get_max_perf_mode_cmds(h);
Stephen M. Cameron8a4ec672011-05-03 14:54:12 -05004259 h->nr_cmds = h->max_commands - 4 - cciss_tape_cmds;
Stephen M. Cameronafadbf42010-07-19 13:45:31 -05004260 h->maxsgentries = readl(&(h->cfgtable->MaxSGElements));
4261 /*
Mike Millere7b18ed2013-09-11 14:20:11 -07004262 * The P600 may exhibit poor performnace under some workloads
4263 * if we use the value in the configuration table. Limit this
4264 * controller to MAXSGENTRIES (32) instead.
4265 */
4266 if (h->board_id == 0x3225103C)
4267 h->maxsgentries = MAXSGENTRIES;
4268 /*
Stephen M. Cameronafadbf42010-07-19 13:45:31 -05004269 * Limit in-command s/g elements to 32 save dma'able memory.
4270 * Howvever spec says if 0, use 31
4271 */
4272 h->max_cmd_sgentries = 31;
4273 if (h->maxsgentries > 512) {
4274 h->max_cmd_sgentries = 32;
4275 h->chainsize = h->maxsgentries - h->max_cmd_sgentries + 1;
4276 h->maxsgentries--; /* save one for chain pointer */
4277 } else {
4278 h->maxsgentries = 31; /* default to traditional values */
4279 h->chainsize = 0;
4280 }
4281}
4282
Stephen M. Cameron501b92c2010-07-19 13:45:36 -05004283static inline bool CISS_signature_present(ctlr_info_t *h)
4284{
Akinobu Mitad48c1522012-11-08 16:12:23 -08004285 if (!check_signature(h->cfgtable->Signature, "CISS", 4)) {
Stephen M. Cameron501b92c2010-07-19 13:45:36 -05004286 dev_warn(&h->pdev->dev, "not a valid CISS config table\n");
4287 return false;
4288 }
4289 return true;
4290}
4291
Stephen M. Cameron322e3042010-07-19 13:45:41 -05004292/* Need to enable prefetch in the SCSI core for 6400 in x86 */
4293static inline void cciss_enable_scsi_prefetch(ctlr_info_t *h)
4294{
4295#ifdef CONFIG_X86
4296 u32 prefetch;
4297
4298 prefetch = readl(&(h->cfgtable->SCSI_Prefetch));
4299 prefetch |= 0x100;
4300 writel(prefetch, &(h->cfgtable->SCSI_Prefetch));
4301#endif
4302}
4303
Stephen M. Cameronbfd63ee2010-07-19 13:45:46 -05004304/* Disable DMA prefetch for the P600. Otherwise an ASIC bug may result
4305 * in a prefetch beyond physical memory.
4306 */
4307static inline void cciss_p600_dma_prefetch_quirk(ctlr_info_t *h)
4308{
4309 u32 dma_prefetch;
4310 __u32 dma_refetch;
4311
4312 if (h->board_id != 0x3225103C)
4313 return;
4314 dma_prefetch = readl(h->vaddr + I2O_DMA1_CFG);
4315 dma_prefetch |= 0x8000;
4316 writel(dma_prefetch, h->vaddr + I2O_DMA1_CFG);
4317 pci_read_config_dword(h->pdev, PCI_COMMAND_PARITY, &dma_refetch);
4318 dma_refetch |= 0x1;
4319 pci_write_config_dword(h->pdev, PCI_COMMAND_PARITY, dma_refetch);
4320}
4321
Greg Kroah-Hartman8d85fce2012-12-21 15:13:49 -08004322static int cciss_pci_init(ctlr_info_t *h)
Stephen M. Cameron6539fa92010-07-19 13:44:55 -05004323{
Stephen M. Cameron4809d092010-07-19 13:45:21 -05004324 int prod_index, err;
Stephen M. Cameron6539fa92010-07-19 13:44:55 -05004325
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05004326 prod_index = cciss_lookup_board_id(h->pdev, &h->board_id);
Stephen M. Cameron6539fa92010-07-19 13:44:55 -05004327 if (prod_index < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004328 return -ENODEV;
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05004329 h->product_name = products[prod_index].product_name;
4330 h->access = *(products[prod_index].access);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004331
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05004332 if (cciss_board_disabled(h)) {
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05004333 dev_warn(&h->pdev->dev, "controller appears to be disabled\n");
Bjorn Helgaasc33ac892006-06-25 05:49:01 -07004334 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004335 }
Matthew Garrett19373352011-11-11 22:05:54 +01004336
4337 pci_disable_link_state(h->pdev, PCIE_LINK_STATE_L0S |
4338 PCIE_LINK_STATE_L1 | PCIE_LINK_STATE_CLKPM);
4339
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05004340 err = pci_enable_device(h->pdev);
Bjorn Helgaas7c832832006-06-25 05:49:06 -07004341 if (err) {
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05004342 dev_warn(&h->pdev->dev, "Unable to Enable PCI device\n");
Bjorn Helgaasc33ac892006-06-25 05:49:01 -07004343 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004344 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004345
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05004346 err = pci_request_regions(h->pdev, "cciss");
Bjorn Helgaas4e570302006-06-25 05:49:02 -07004347 if (err) {
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05004348 dev_warn(&h->pdev->dev,
4349 "Cannot obtain PCI resources, aborting\n");
Mike Miller872225c2006-12-13 00:34:22 -08004350 return err;
Bjorn Helgaas4e570302006-06-25 05:49:02 -07004351 }
4352
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05004353 dev_dbg(&h->pdev->dev, "irq = %x\n", h->pdev->irq);
4354 dev_dbg(&h->pdev->dev, "board_id = %x\n", h->board_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004355
Mike Millerfb86a352006-01-08 01:03:50 -08004356/* If the kernel supports MSI/MSI-X we will try to enable that functionality,
4357 * else we use the IO-APIC interrupt assigned to us by system ROM.
4358 */
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05004359 cciss_interrupt_mode(h);
4360 err = cciss_pci_find_memory_BAR(h->pdev, &h->paddr);
Stephen M. Camerond4748302010-07-19 13:45:10 -05004361 if (err)
Mike Millere1438582009-04-02 12:50:56 -07004362 goto err_out_free_res;
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05004363 h->vaddr = remap_pci_mem(h->paddr, 0x250);
4364 if (!h->vaddr) {
Stephen M. Cameronda550322010-07-19 13:45:26 -05004365 err = -ENOMEM;
4366 goto err_out_free_res;
Mike Millere1438582009-04-02 12:50:56 -07004367 }
Stephen M. Cameronafa842f2010-10-22 14:21:07 -05004368 err = cciss_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY);
Stephen M. Camerone99ba132010-07-19 13:45:15 -05004369 if (err)
Bjorn Helgaas4e570302006-06-25 05:49:02 -07004370 goto err_out_free_res;
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05004371 err = cciss_find_cfgtables(h);
Stephen M. Cameron4809d092010-07-19 13:45:21 -05004372 if (err)
Bjorn Helgaas4e570302006-06-25 05:49:02 -07004373 goto err_out_free_res;
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05004374 print_cfg_table(h);
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05004375 cciss_find_board_params(h);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004376
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05004377 if (!CISS_signature_present(h)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004378 err = -ENODEV;
4379 goto err_out_free_res;
4380 }
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05004381 cciss_enable_scsi_prefetch(h);
4382 cciss_p600_dma_prefetch_quirk(h);
Joseph Handzik13049532011-08-08 11:40:15 +02004383 err = cciss_enter_simple_mode(h);
4384 if (err)
4385 goto err_out_free_res;
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05004386 cciss_put_controller_into_performant_mode(h);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004387 return 0;
4388
Linus Torvalds5faad622006-12-13 09:15:34 -08004389err_out_free_res:
Mike Miller872225c2006-12-13 00:34:22 -08004390 /*
4391 * Deliberately omit pci_disable_device(): it does something nasty to
4392 * Smart Array controllers that pci_enable_device does not undo
4393 */
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05004394 if (h->transtable)
4395 iounmap(h->transtable);
4396 if (h->cfgtable)
4397 iounmap(h->cfgtable);
4398 if (h->vaddr)
4399 iounmap(h->vaddr);
4400 pci_release_regions(h->pdev);
Bjorn Helgaasc33ac892006-06-25 05:49:01 -07004401 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004402}
4403
Mike Miller6ae5ce82008-08-04 11:54:52 +02004404/* Function to find the first free pointer into our hba[] array
4405 * Returns -1 if no free entries are left.
Bjorn Helgaas7c832832006-06-25 05:49:06 -07004406 */
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05004407static int alloc_cciss_hba(struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004408{
Mike Miller799202c2006-12-06 20:35:12 -08004409 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004410
Bjorn Helgaas7c832832006-06-25 05:49:06 -07004411 for (i = 0; i < MAX_CTLR; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004412 if (!hba[i]) {
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05004413 ctlr_info_t *h;
Jesper Juhlf2912a12007-07-31 00:39:39 -07004414
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05004415 h = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
4416 if (!h)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004417 goto Enomem;
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05004418 hba[i] = h;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004419 return i;
4420 }
4421 }
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05004422 dev_warn(&pdev->dev, "This driver supports a maximum"
Bjorn Helgaas7c832832006-06-25 05:49:06 -07004423 " of %d controllers.\n", MAX_CTLR);
Mike Miller799202c2006-12-06 20:35:12 -08004424 return -1;
4425Enomem:
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05004426 dev_warn(&pdev->dev, "out of memory.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07004427 return -1;
4428}
4429
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05004430static void free_hba(ctlr_info_t *h)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004431{
Stephen M. Cameron2c935592009-09-17 13:47:50 -05004432 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004433
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05004434 hba[h->ctlr] = NULL;
Stephen M. Cameron2c935592009-09-17 13:47:50 -05004435 for (i = 0; i < h->highest_lun + 1; i++)
4436 if (h->gendisk[i] != NULL)
4437 put_disk(h->gendisk[i]);
4438 kfree(h);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004439}
4440
Chip Coldwell82eb03c2009-02-16 13:11:56 +01004441/* Send a message CDB to the firmware. */
Greg Kroah-Hartman8d85fce2012-12-21 15:13:49 -08004442static int cciss_message(struct pci_dev *pdev, unsigned char opcode,
4443 unsigned char type)
Chip Coldwell82eb03c2009-02-16 13:11:56 +01004444{
4445 typedef struct {
4446 CommandListHeader_struct CommandHeader;
4447 RequestBlock_struct Request;
4448 ErrDescriptor_struct ErrorDescriptor;
4449 } Command;
4450 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct);
4451 Command *cmd;
4452 dma_addr_t paddr64;
4453 uint32_t paddr32, tag;
4454 void __iomem *vaddr;
4455 int i, err;
4456
4457 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
4458 if (vaddr == NULL)
4459 return -ENOMEM;
4460
4461 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
4462 CCISS commands, so they must be allocated from the lower 4GiB of
4463 memory. */
Yang Hongyange9304382009-04-13 14:40:14 -07004464 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
Chip Coldwell82eb03c2009-02-16 13:11:56 +01004465 if (err) {
4466 iounmap(vaddr);
4467 return -ENOMEM;
4468 }
4469
4470 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
4471 if (cmd == NULL) {
4472 iounmap(vaddr);
4473 return -ENOMEM;
4474 }
4475
4476 /* This must fit, because of the 32-bit consistent DMA mask. Also,
4477 although there's no guarantee, we assume that the address is at
4478 least 4-byte aligned (most likely, it's page-aligned). */
4479 paddr32 = paddr64;
4480
4481 cmd->CommandHeader.ReplyQueue = 0;
4482 cmd->CommandHeader.SGList = 0;
4483 cmd->CommandHeader.SGTotal = 0;
4484 cmd->CommandHeader.Tag.lower = paddr32;
4485 cmd->CommandHeader.Tag.upper = 0;
4486 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
4487
4488 cmd->Request.CDBLen = 16;
4489 cmd->Request.Type.Type = TYPE_MSG;
4490 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
4491 cmd->Request.Type.Direction = XFER_NONE;
4492 cmd->Request.Timeout = 0; /* Don't time out */
4493 cmd->Request.CDB[0] = opcode;
4494 cmd->Request.CDB[1] = type;
4495 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */
4496
4497 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command);
4498 cmd->ErrorDescriptor.Addr.upper = 0;
4499 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct);
4500
4501 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
4502
4503 for (i = 0; i < 10; i++) {
4504 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
4505 if ((tag & ~3) == paddr32)
4506 break;
Stephen M. Cameron3e286012011-05-03 14:53:41 -05004507 msleep(CCISS_POST_RESET_NOOP_TIMEOUT_MSECS);
Chip Coldwell82eb03c2009-02-16 13:11:56 +01004508 }
4509
4510 iounmap(vaddr);
4511
4512 /* we leak the DMA buffer here ... no choice since the controller could
4513 still complete the command. */
4514 if (i == 10) {
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05004515 dev_err(&pdev->dev,
4516 "controller message %02x:%02x timed out\n",
Chip Coldwell82eb03c2009-02-16 13:11:56 +01004517 opcode, type);
4518 return -ETIMEDOUT;
4519 }
4520
4521 pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
4522
4523 if (tag & 2) {
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05004524 dev_err(&pdev->dev, "controller message %02x:%02x failed\n",
Chip Coldwell82eb03c2009-02-16 13:11:56 +01004525 opcode, type);
4526 return -EIO;
4527 }
4528
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05004529 dev_info(&pdev->dev, "controller message %02x:%02x succeeded\n",
Chip Coldwell82eb03c2009-02-16 13:11:56 +01004530 opcode, type);
4531 return 0;
4532}
4533
Chip Coldwell82eb03c2009-02-16 13:11:56 +01004534#define cciss_noop(p) cciss_message(p, 3, 0)
4535
Stephen M. Camerona6528d02010-07-19 13:46:22 -05004536static int cciss_controller_hard_reset(struct pci_dev *pdev,
Stephen M. Cameronbf2e2e62011-05-03 14:53:46 -05004537 void * __iomem vaddr, u32 use_doorbell)
Chip Coldwell82eb03c2009-02-16 13:11:56 +01004538{
Stephen M. Camerona6528d02010-07-19 13:46:22 -05004539 u16 pmcsr;
4540 int pos;
Chip Coldwell82eb03c2009-02-16 13:11:56 +01004541
Stephen M. Camerona6528d02010-07-19 13:46:22 -05004542 if (use_doorbell) {
4543 /* For everything after the P600, the PCI power state method
4544 * of resetting the controller doesn't work, so we have this
4545 * other way using the doorbell register.
4546 */
4547 dev_info(&pdev->dev, "using doorbell to reset controller\n");
Stephen M. Cameronbf2e2e62011-05-03 14:53:46 -05004548 writel(use_doorbell, vaddr + SA5_DOORBELL);
Stephen M. Camerona6528d02010-07-19 13:46:22 -05004549 } else { /* Try to do it the PCI power state way */
Chip Coldwell82eb03c2009-02-16 13:11:56 +01004550
Stephen M. Camerona6528d02010-07-19 13:46:22 -05004551 /* Quoting from the Open CISS Specification: "The Power
4552 * Management Control/Status Register (CSR) controls the power
4553 * state of the device. The normal operating state is D0,
4554 * CSR=00h. The software off state is D3, CSR=03h. To reset
4555 * the controller, place the interface device in D3 then to D0,
4556 * this causes a secondary PCI reset which will reset the
4557 * controller." */
Chip Coldwell82eb03c2009-02-16 13:11:56 +01004558
Stephen M. Camerona6528d02010-07-19 13:46:22 -05004559 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
4560 if (pos == 0) {
4561 dev_err(&pdev->dev,
4562 "cciss_controller_hard_reset: "
4563 "PCI PM not supported\n");
4564 return -ENODEV;
4565 }
4566 dev_info(&pdev->dev, "using PCI PM to reset controller\n");
4567 /* enter the D3hot power management state */
4568 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
4569 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4570 pmcsr |= PCI_D3hot;
4571 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
Chip Coldwell82eb03c2009-02-16 13:11:56 +01004572
Stephen M. Camerona6528d02010-07-19 13:46:22 -05004573 msleep(500);
4574
4575 /* enter the D0 power management state */
4576 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4577 pmcsr |= PCI_D0;
4578 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
Mike Millerab5dbeb2011-10-20 22:19:17 +02004579
4580 /*
4581 * The P600 requires a small delay when changing states.
4582 * Otherwise we may think the board did not reset and we bail.
4583 * This for kdump only and is particular to the P600.
4584 */
4585 msleep(500);
Stephen M. Camerona6528d02010-07-19 13:46:22 -05004586 }
4587 return 0;
4588}
4589
Greg Kroah-Hartman8d85fce2012-12-21 15:13:49 -08004590static void init_driver_version(char *driver_version, int len)
Stephen M. Cameron62710ae2011-05-03 14:53:00 -05004591{
4592 memset(driver_version, 0, len);
4593 strncpy(driver_version, "cciss " DRIVER_NAME, len - 1);
4594}
4595
Greg Kroah-Hartman8d85fce2012-12-21 15:13:49 -08004596static int write_driver_ver_to_cfgtable(CfgTable_struct __iomem *cfgtable)
Stephen M. Cameron62710ae2011-05-03 14:53:00 -05004597{
4598 char *driver_version;
4599 int i, size = sizeof(cfgtable->driver_version);
4600
4601 driver_version = kmalloc(size, GFP_KERNEL);
4602 if (!driver_version)
4603 return -ENOMEM;
4604
4605 init_driver_version(driver_version, size);
4606 for (i = 0; i < size; i++)
4607 writeb(driver_version[i], &cfgtable->driver_version[i]);
4608 kfree(driver_version);
4609 return 0;
4610}
4611
Greg Kroah-Hartman8d85fce2012-12-21 15:13:49 -08004612static void read_driver_ver_from_cfgtable(CfgTable_struct __iomem *cfgtable,
4613 unsigned char *driver_ver)
Stephen M. Cameron62710ae2011-05-03 14:53:00 -05004614{
4615 int i;
4616
4617 for (i = 0; i < sizeof(cfgtable->driver_version); i++)
4618 driver_ver[i] = readb(&cfgtable->driver_version[i]);
4619}
4620
Greg Kroah-Hartman8d85fce2012-12-21 15:13:49 -08004621static int controller_reset_failed(CfgTable_struct __iomem *cfgtable)
Stephen M. Cameron62710ae2011-05-03 14:53:00 -05004622{
4623
4624 char *driver_ver, *old_driver_ver;
4625 int rc, size = sizeof(cfgtable->driver_version);
4626
4627 old_driver_ver = kmalloc(2 * size, GFP_KERNEL);
4628 if (!old_driver_ver)
4629 return -ENOMEM;
4630 driver_ver = old_driver_ver + size;
4631
4632 /* After a reset, the 32 bytes of "driver version" in the cfgtable
4633 * should have been changed, otherwise we know the reset failed.
4634 */
4635 init_driver_version(old_driver_ver, size);
4636 read_driver_ver_from_cfgtable(cfgtable, driver_ver);
4637 rc = !memcmp(driver_ver, old_driver_ver, size);
4638 kfree(old_driver_ver);
4639 return rc;
4640}
4641
Stephen M. Camerona6528d02010-07-19 13:46:22 -05004642/* This does a hard reset of the controller using PCI power management
4643 * states or using the doorbell register. */
Greg Kroah-Hartman8d85fce2012-12-21 15:13:49 -08004644static int cciss_kdump_hard_reset_controller(struct pci_dev *pdev)
Stephen M. Camerona6528d02010-07-19 13:46:22 -05004645{
Stephen M. Camerona6528d02010-07-19 13:46:22 -05004646 u64 cfg_offset;
4647 u32 cfg_base_addr;
4648 u64 cfg_base_addr_index;
4649 void __iomem *vaddr;
4650 unsigned long paddr;
Stephen M. Cameron62710ae2011-05-03 14:53:00 -05004651 u32 misc_fw_support;
Stephen M. Cameronf442e642010-10-22 14:21:12 -05004652 int rc;
Stephen M. Camerona6528d02010-07-19 13:46:22 -05004653 CfgTable_struct __iomem *cfgtable;
Stephen M. Cameronbf2e2e62011-05-03 14:53:46 -05004654 u32 use_doorbell;
Stephen M. Cameron058a0f92010-07-19 13:46:33 -05004655 u32 board_id;
Stephen M. Cameronf442e642010-10-22 14:21:12 -05004656 u16 command_register;
Stephen M. Camerona6528d02010-07-19 13:46:22 -05004657
4658 /* For controllers as old a the p600, this is very nearly
4659 * the same thing as
4660 *
4661 * pci_save_state(pci_dev);
4662 * pci_set_power_state(pci_dev, PCI_D3hot);
4663 * pci_set_power_state(pci_dev, PCI_D0);
4664 * pci_restore_state(pci_dev);
4665 *
Stephen M. Camerona6528d02010-07-19 13:46:22 -05004666 * For controllers newer than the P600, the pci power state
4667 * method of resetting doesn't work so we have another way
4668 * using the doorbell register.
4669 */
Chip Coldwell82eb03c2009-02-16 13:11:56 +01004670
Stephen M. Cameron058a0f92010-07-19 13:46:33 -05004671 /* Exclude 640x boards. These are two pci devices in one slot
4672 * which share a battery backed cache module. One controls the
4673 * cache, the other accesses the cache through the one that controls
4674 * it. If we reset the one controlling the cache, the other will
4675 * likely not be happy. Just forbid resetting this conjoined mess.
4676 */
4677 cciss_lookup_board_id(pdev, &board_id);
Stephen M. Cameronec52d5f2011-05-03 14:54:02 -05004678 if (!ctlr_is_resettable(board_id)) {
Stephen M. Cameron058a0f92010-07-19 13:46:33 -05004679 dev_warn(&pdev->dev, "Cannot reset Smart Array 640x "
4680 "due to shared cache module.");
4681 return -ENODEV;
4682 }
Chip Coldwell82eb03c2009-02-16 13:11:56 +01004683
Stephen M. Cameronec52d5f2011-05-03 14:54:02 -05004684 /* if controller is soft- but not hard resettable... */
4685 if (!ctlr_is_hard_resettable(board_id))
4686 return -ENOTSUPP; /* try soft reset later. */
4687
Stephen M. Cameronf442e642010-10-22 14:21:12 -05004688 /* Save the PCI command register */
4689 pci_read_config_word(pdev, 4, &command_register);
4690 /* Turn the board off. This is so that later pci_restore_state()
4691 * won't turn the board on before the rest of config space is ready.
4692 */
4693 pci_disable_device(pdev);
4694 pci_save_state(pdev);
Chip Coldwell82eb03c2009-02-16 13:11:56 +01004695
Stephen M. Camerona6528d02010-07-19 13:46:22 -05004696 /* find the first memory BAR, so we can find the cfg table */
4697 rc = cciss_pci_find_memory_BAR(pdev, &paddr);
4698 if (rc)
4699 return rc;
4700 vaddr = remap_pci_mem(paddr, 0x250);
4701 if (!vaddr)
4702 return -ENOMEM;
4703
4704 /* find cfgtable in order to check if reset via doorbell is supported */
4705 rc = cciss_find_cfg_addrs(pdev, vaddr, &cfg_base_addr,
4706 &cfg_base_addr_index, &cfg_offset);
4707 if (rc)
4708 goto unmap_vaddr;
4709 cfgtable = remap_pci_mem(pci_resource_start(pdev,
4710 cfg_base_addr_index) + cfg_offset, sizeof(*cfgtable));
4711 if (!cfgtable) {
4712 rc = -ENOMEM;
4713 goto unmap_vaddr;
Chip Coldwell82eb03c2009-02-16 13:11:56 +01004714 }
Stephen M. Cameron62710ae2011-05-03 14:53:00 -05004715 rc = write_driver_ver_to_cfgtable(cfgtable);
4716 if (rc)
4717 goto unmap_vaddr;
Chip Coldwell82eb03c2009-02-16 13:11:56 +01004718
Stephen M. Cameronbf2e2e62011-05-03 14:53:46 -05004719 /* If reset via doorbell register is supported, use that.
4720 * There are two such methods. Favor the newest method.
Stephen M. Cameron75230ff2010-08-23 11:02:17 +02004721 */
Stephen M. Cameronbf2e2e62011-05-03 14:53:46 -05004722 misc_fw_support = readl(&cfgtable->misc_fw_support);
4723 use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET2;
4724 if (use_doorbell) {
4725 use_doorbell = DOORBELL_CTLR_RESET2;
4726 } else {
4727 use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET;
Stephen M. Cameron063d2cf2011-05-03 14:54:07 -05004728 if (use_doorbell) {
4729 dev_warn(&pdev->dev, "Controller claims that "
4730 "'Bit 2 doorbell reset' is "
4731 "supported, but not 'bit 5 doorbell reset'. "
4732 "Firmware update is recommended.\n");
4733 rc = -ENOTSUPP; /* use the soft reset */
4734 goto unmap_cfgtable;
4735 }
Stephen M. Cameronbf2e2e62011-05-03 14:53:46 -05004736 }
Stephen M. Cameron75230ff2010-08-23 11:02:17 +02004737
Stephen M. Camerona6528d02010-07-19 13:46:22 -05004738 rc = cciss_controller_hard_reset(pdev, vaddr, use_doorbell);
4739 if (rc)
4740 goto unmap_cfgtable;
Stephen M. Cameronf442e642010-10-22 14:21:12 -05004741 pci_restore_state(pdev);
4742 rc = pci_enable_device(pdev);
4743 if (rc) {
4744 dev_warn(&pdev->dev, "failed to enable device.\n");
4745 goto unmap_cfgtable;
Chip Coldwell82eb03c2009-02-16 13:11:56 +01004746 }
Stephen M. Cameronf442e642010-10-22 14:21:12 -05004747 pci_write_config_word(pdev, 4, command_register);
Chip Coldwell82eb03c2009-02-16 13:11:56 +01004748
Stephen M. Camerona6528d02010-07-19 13:46:22 -05004749 /* Some devices (notably the HP Smart Array 5i Controller)
4750 need a little pause here */
4751 msleep(CCISS_POST_RESET_PAUSE_MSECS);
4752
Stephen M. Cameronafa842f2010-10-22 14:21:07 -05004753 /* Wait for board to become not ready, then ready. */
Stephen M. Cameron59ec86b2011-05-03 14:53:36 -05004754 dev_info(&pdev->dev, "Waiting for board to reset.\n");
Stephen M. Cameronafa842f2010-10-22 14:21:07 -05004755 rc = cciss_wait_for_board_state(pdev, vaddr, BOARD_NOT_READY);
Stephen M. Cameron5afe2782011-05-03 14:53:52 -05004756 if (rc) {
4757 dev_warn(&pdev->dev, "Failed waiting for board to hard reset."
4758 " Will try soft reset.\n");
4759 rc = -ENOTSUPP; /* Not expected, but try soft reset later */
4760 goto unmap_cfgtable;
4761 }
Stephen M. Cameronafa842f2010-10-22 14:21:07 -05004762 rc = cciss_wait_for_board_state(pdev, vaddr, BOARD_READY);
4763 if (rc) {
4764 dev_warn(&pdev->dev,
Stephen M. Cameron5afe2782011-05-03 14:53:52 -05004765 "failed waiting for board to become ready "
4766 "after hard reset\n");
Stephen M. Cameronafa842f2010-10-22 14:21:07 -05004767 goto unmap_cfgtable;
4768 }
Stephen M. Cameronafa842f2010-10-22 14:21:07 -05004769
Stephen M. Cameron62710ae2011-05-03 14:53:00 -05004770 rc = controller_reset_failed(vaddr);
4771 if (rc < 0)
4772 goto unmap_cfgtable;
4773 if (rc) {
Stephen M. Cameron5afe2782011-05-03 14:53:52 -05004774 dev_warn(&pdev->dev, "Unable to successfully hard reset "
4775 "controller. Will try soft reset.\n");
4776 rc = -ENOTSUPP; /* Not expected, but try soft reset later */
Stephen M. Cameron62710ae2011-05-03 14:53:00 -05004777 } else {
Stephen M. Cameron5afe2782011-05-03 14:53:52 -05004778 dev_info(&pdev->dev, "Board ready after hard reset.\n");
Stephen M. Camerona6528d02010-07-19 13:46:22 -05004779 }
4780
4781unmap_cfgtable:
4782 iounmap(cfgtable);
4783
4784unmap_vaddr:
4785 iounmap(vaddr);
4786 return rc;
Chip Coldwell82eb03c2009-02-16 13:11:56 +01004787}
4788
Greg Kroah-Hartman8d85fce2012-12-21 15:13:49 -08004789static int cciss_init_reset_devices(struct pci_dev *pdev)
Stephen M. Cameron83123cb2010-07-19 13:46:17 -05004790{
Stephen M. Camerona6528d02010-07-19 13:46:22 -05004791 int rc, i;
Stephen M. Cameron83123cb2010-07-19 13:46:17 -05004792
4793 if (!reset_devices)
4794 return 0;
4795
Stephen M. Camerona6528d02010-07-19 13:46:22 -05004796 /* Reset the controller with a PCI power-cycle or via doorbell */
4797 rc = cciss_kdump_hard_reset_controller(pdev);
Stephen M. Cameron83123cb2010-07-19 13:46:17 -05004798
Stephen M. Camerona6528d02010-07-19 13:46:22 -05004799 /* -ENOTSUPP here means we cannot reset the controller
4800 * but it's already (and still) up and running in
Stephen M. Cameron058a0f92010-07-19 13:46:33 -05004801 * "performant mode". Or, it might be 640x, which can't reset
4802 * due to concerns about shared bbwc between 6402/6404 pair.
Stephen M. Camerona6528d02010-07-19 13:46:22 -05004803 */
4804 if (rc == -ENOTSUPP)
Stephen M. Cameron5afe2782011-05-03 14:53:52 -05004805 return rc; /* just try to do the kdump anyhow. */
Stephen M. Camerona6528d02010-07-19 13:46:22 -05004806 if (rc)
4807 return -ENODEV;
Stephen M. Cameron83123cb2010-07-19 13:46:17 -05004808
4809 /* Now try to get the controller to respond to a no-op */
Stephen M. Cameron59ec86b2011-05-03 14:53:36 -05004810 dev_warn(&pdev->dev, "Waiting for controller to respond to no-op\n");
Stephen M. Cameron83123cb2010-07-19 13:46:17 -05004811 for (i = 0; i < CCISS_POST_RESET_NOOP_RETRIES; i++) {
4812 if (cciss_noop(pdev) == 0)
4813 break;
4814 else
4815 dev_warn(&pdev->dev, "no-op failed%s\n",
4816 (i < CCISS_POST_RESET_NOOP_RETRIES - 1 ?
4817 "; re-trying" : ""));
4818 msleep(CCISS_POST_RESET_NOOP_INTERVAL_MSECS);
4819 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004820 return 0;
4821}
4822
Greg Kroah-Hartman8d85fce2012-12-21 15:13:49 -08004823static int cciss_allocate_cmd_pool(ctlr_info_t *h)
Stephen M. Cameron54dae342011-05-03 14:53:05 -05004824{
Akinobu Mita1f118bc2012-11-08 16:12:22 -08004825 h->cmd_pool_bits = kmalloc(BITS_TO_LONGS(h->nr_cmds) *
Stephen M. Cameron54dae342011-05-03 14:53:05 -05004826 sizeof(unsigned long), GFP_KERNEL);
4827 h->cmd_pool = pci_alloc_consistent(h->pdev,
4828 h->nr_cmds * sizeof(CommandList_struct),
4829 &(h->cmd_pool_dhandle));
4830 h->errinfo_pool = pci_alloc_consistent(h->pdev,
4831 h->nr_cmds * sizeof(ErrorInfo_struct),
4832 &(h->errinfo_pool_dhandle));
4833 if ((h->cmd_pool_bits == NULL)
4834 || (h->cmd_pool == NULL)
4835 || (h->errinfo_pool == NULL)) {
4836 dev_err(&h->pdev->dev, "out of memory");
4837 return -ENOMEM;
4838 }
4839 return 0;
4840}
4841
Greg Kroah-Hartman8d85fce2012-12-21 15:13:49 -08004842static int cciss_allocate_scatterlists(ctlr_info_t *h)
Stephen M. Cameronabf79662011-05-03 14:53:10 -05004843{
4844 int i;
4845
4846 /* zero it, so that on free we need not know how many were alloc'ed */
4847 h->scatter_list = kzalloc(h->max_commands *
4848 sizeof(struct scatterlist *), GFP_KERNEL);
4849 if (!h->scatter_list)
4850 return -ENOMEM;
4851
4852 for (i = 0; i < h->nr_cmds; i++) {
4853 h->scatter_list[i] = kmalloc(sizeof(struct scatterlist) *
4854 h->maxsgentries, GFP_KERNEL);
4855 if (h->scatter_list[i] == NULL) {
4856 dev_err(&h->pdev->dev, "could not allocate "
4857 "s/g lists\n");
4858 return -ENOMEM;
4859 }
4860 }
4861 return 0;
4862}
4863
4864static void cciss_free_scatterlists(ctlr_info_t *h)
4865{
4866 int i;
4867
4868 if (h->scatter_list) {
4869 for (i = 0; i < h->nr_cmds; i++)
4870 kfree(h->scatter_list[i]);
4871 kfree(h->scatter_list);
4872 }
4873}
4874
Stephen M. Cameron54dae342011-05-03 14:53:05 -05004875static void cciss_free_cmd_pool(ctlr_info_t *h)
4876{
4877 kfree(h->cmd_pool_bits);
4878 if (h->cmd_pool)
4879 pci_free_consistent(h->pdev,
4880 h->nr_cmds * sizeof(CommandList_struct),
4881 h->cmd_pool, h->cmd_pool_dhandle);
4882 if (h->errinfo_pool)
4883 pci_free_consistent(h->pdev,
4884 h->nr_cmds * sizeof(ErrorInfo_struct),
4885 h->errinfo_pool, h->errinfo_pool_dhandle);
4886}
4887
Stephen M. Cameron2b480852011-05-03 14:53:16 -05004888static int cciss_request_irq(ctlr_info_t *h,
4889 irqreturn_t (*msixhandler)(int, void *),
4890 irqreturn_t (*intxhandler)(int, void *))
4891{
4892 if (h->msix_vector || h->msi_vector) {
Joseph Handzik13049532011-08-08 11:40:15 +02004893 if (!request_irq(h->intr[h->intr_mode], msixhandler,
Stephen M. Cameron6225da42011-11-28 20:12:05 +01004894 0, h->devname, h))
Stephen M. Cameron2b480852011-05-03 14:53:16 -05004895 return 0;
4896 dev_err(&h->pdev->dev, "Unable to get msi irq %d"
Joseph Handzik13049532011-08-08 11:40:15 +02004897 " for %s\n", h->intr[h->intr_mode],
Stephen M. Cameron2b480852011-05-03 14:53:16 -05004898 h->devname);
4899 return -1;
4900 }
4901
Joseph Handzik13049532011-08-08 11:40:15 +02004902 if (!request_irq(h->intr[h->intr_mode], intxhandler,
Stephen M. Cameron6225da42011-11-28 20:12:05 +01004903 IRQF_SHARED, h->devname, h))
Stephen M. Cameron2b480852011-05-03 14:53:16 -05004904 return 0;
4905 dev_err(&h->pdev->dev, "Unable to get irq %d for %s\n",
Joseph Handzik13049532011-08-08 11:40:15 +02004906 h->intr[h->intr_mode], h->devname);
Stephen M. Cameron2b480852011-05-03 14:53:16 -05004907 return -1;
4908}
4909
Greg Kroah-Hartman8d85fce2012-12-21 15:13:49 -08004910static int cciss_kdump_soft_reset(ctlr_info_t *h)
Stephen M. Cameron5afe2782011-05-03 14:53:52 -05004911{
4912 if (cciss_send_reset(h, CTLR_LUNID, CCISS_RESET_TYPE_CONTROLLER)) {
4913 dev_warn(&h->pdev->dev, "Resetting array controller failed.\n");
4914 return -EIO;
4915 }
4916
4917 dev_info(&h->pdev->dev, "Waiting for board to soft reset.\n");
4918 if (cciss_wait_for_board_state(h->pdev, h->vaddr, BOARD_NOT_READY)) {
4919 dev_warn(&h->pdev->dev, "Soft reset had no effect.\n");
4920 return -1;
4921 }
4922
4923 dev_info(&h->pdev->dev, "Board reset, awaiting READY status.\n");
4924 if (cciss_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY)) {
4925 dev_warn(&h->pdev->dev, "Board failed to become ready "
4926 "after soft reset.\n");
4927 return -1;
4928 }
4929
4930 return 0;
4931}
4932
4933static void cciss_undo_allocations_after_kdump_soft_reset(ctlr_info_t *h)
4934{
4935 int ctlr = h->ctlr;
4936
Joseph Handzik13049532011-08-08 11:40:15 +02004937 free_irq(h->intr[h->intr_mode], h);
Stephen M. Cameron5afe2782011-05-03 14:53:52 -05004938#ifdef CONFIG_PCI_MSI
4939 if (h->msix_vector)
4940 pci_disable_msix(h->pdev);
4941 else if (h->msi_vector)
4942 pci_disable_msi(h->pdev);
4943#endif /* CONFIG_PCI_MSI */
4944 cciss_free_sg_chain_blocks(h->cmd_sg_list, h->nr_cmds);
4945 cciss_free_scatterlists(h);
4946 cciss_free_cmd_pool(h);
4947 kfree(h->blockFetchTable);
4948 if (h->reply_pool)
4949 pci_free_consistent(h->pdev, h->max_commands * sizeof(__u64),
4950 h->reply_pool, h->reply_pool_dhandle);
4951 if (h->transtable)
4952 iounmap(h->transtable);
4953 if (h->cfgtable)
4954 iounmap(h->cfgtable);
4955 if (h->vaddr)
4956 iounmap(h->vaddr);
4957 unregister_blkdev(h->major, h->devname);
4958 cciss_destroy_hba_sysfs_entry(h);
4959 pci_release_regions(h->pdev);
4960 kfree(h);
4961 hba[ctlr] = NULL;
4962}
4963
Linus Torvalds1da177e2005-04-16 15:20:36 -07004964/*
4965 * This is it. Find all the controllers and register them. I really hate
4966 * stealing all these major device numbers.
4967 * returns the number of block devices registered.
4968 */
Greg Kroah-Hartman8d85fce2012-12-21 15:13:49 -08004969static int cciss_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004970{
Linus Torvalds1da177e2005-04-16 15:20:36 -07004971 int i;
Mike Miller799202c2006-12-06 20:35:12 -08004972 int j = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004973 int rc;
Stephen M. Cameron5afe2782011-05-03 14:53:52 -05004974 int try_soft_reset = 0;
Mike Miller22bece02008-11-06 12:53:25 -08004975 int dac, return_code;
Eric Dumazet212a5022009-08-24 10:01:53 +02004976 InquiryData_struct *inq_buff;
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05004977 ctlr_info_t *h;
Stephen M. Cameron5afe2782011-05-03 14:53:52 -05004978 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004979
Mike Miller0821e902013-04-29 11:55:54 -07004980 /*
4981 * By default the cciss driver is used for all older HP Smart Array
4982 * controllers. There are module paramaters that allow a user to
4983 * override this behavior and instead use the hpsa SCSI driver. If
4984 * this is the case cciss may be loaded first from the kdump initrd
4985 * image and cause a kernel panic. So if reset_devices is true and
4986 * cciss_allow_hpsa is set just bail.
4987 */
4988 if ((reset_devices) && (cciss_allow_hpsa == 1))
4989 return -ENODEV;
Stephen M. Cameron83123cb2010-07-19 13:46:17 -05004990 rc = cciss_init_reset_devices(pdev);
Stephen M. Cameron5afe2782011-05-03 14:53:52 -05004991 if (rc) {
4992 if (rc != -ENOTSUPP)
4993 return rc;
4994 /* If the reset fails in a particular way (it has no way to do
4995 * a proper hard reset, so returns -ENOTSUPP) we can try to do
4996 * a soft reset once we get the controller configured up to the
4997 * point that it can accept a command.
4998 */
4999 try_soft_reset = 1;
5000 rc = 0;
5001 }
5002
5003reinit_after_soft_reset:
5004
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05005005 i = alloc_cciss_hba(pdev);
Bjorn Helgaas7c832832006-06-25 05:49:06 -07005006 if (i < 0)
Bjorn Helgaase2019b52006-06-25 05:49:05 -07005007 return -1;
Mike Miller1f8ef382005-09-13 01:25:21 -07005008
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005009 h = hba[i];
5010 h->pdev = pdev;
5011 h->busy_initializing = 1;
Joseph Handzik13049532011-08-08 11:40:15 +02005012 h->intr_mode = cciss_simple_mode ? SIMPLE_MODE_INT : PERF_MODE_INT;
Jens Axboee6e1ee92011-01-10 21:50:33 +01005013 INIT_LIST_HEAD(&h->cmpQ);
5014 INIT_LIST_HEAD(&h->reqQ);
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005015 mutex_init(&h->busy_shutting_down);
Mike Miller1f8ef382005-09-13 01:25:21 -07005016
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005017 if (cciss_pci_init(h) != 0)
Stephen M. Cameron2cfa9482009-10-13 09:18:22 +02005018 goto clean_no_release_regions;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005019
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005020 sprintf(h->devname, "cciss%d", i);
5021 h->ctlr = i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005022
Stephen M. Cameron8a4ec672011-05-03 14:54:12 -05005023 if (cciss_tape_cmds < 2)
5024 cciss_tape_cmds = 2;
5025 if (cciss_tape_cmds > 16)
5026 cciss_tape_cmds = 16;
5027
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005028 init_completion(&h->scan_wait);
Andrew Pattersonb368c9d2009-09-17 13:46:58 -05005029
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005030 if (cciss_create_hba_sysfs_entry(h))
Andrew Patterson7fe06322009-06-02 14:48:39 +02005031 goto clean0;
5032
Linus Torvalds1da177e2005-04-16 15:20:36 -07005033 /* configure PCI DMA stuff */
Yang Hongyang6a355282009-04-06 19:01:13 -07005034 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
Bjorn Helgaas40aabb52006-06-25 05:49:03 -07005035 dac = 1;
Yang Hongyang284901a2009-04-06 19:01:15 -07005036 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
Bjorn Helgaas40aabb52006-06-25 05:49:03 -07005037 dac = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005038 else {
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05005039 dev_err(&h->pdev->dev, "no suitable DMA available\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07005040 goto clean1;
5041 }
5042
5043 /*
5044 * register with the major number, or get a dynamic major number
5045 * by passing 0 as argument. This is done for greater than
5046 * 8 controller support.
5047 */
5048 if (i < MAX_CTLR_ORIG)
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005049 h->major = COMPAQ_CISS_MAJOR + i;
5050 rc = register_blkdev(h->major, h->devname);
Bjorn Helgaas7c832832006-06-25 05:49:06 -07005051 if (rc == -EBUSY || rc == -EINVAL) {
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05005052 dev_err(&h->pdev->dev,
5053 "Unable to get major number %d for %s "
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005054 "on hba %d\n", h->major, h->devname, i);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005055 goto clean1;
Bjorn Helgaas7c832832006-06-25 05:49:06 -07005056 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07005057 if (i >= MAX_CTLR_ORIG)
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005058 h->major = rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005059 }
5060
5061 /* make sure the board interrupts are off */
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005062 h->access.set_intr_mask(h, CCISS_INTR_OFF);
Stephen M. Cameron2b480852011-05-03 14:53:16 -05005063 rc = cciss_request_irq(h, do_cciss_msix_intr, do_cciss_intx);
5064 if (rc)
5065 goto clean2;
Bjorn Helgaas40aabb52006-06-25 05:49:03 -07005066
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05005067 dev_info(&h->pdev->dev, "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005068 h->devname, pdev->device, pci_name(pdev),
Joseph Handzik13049532011-08-08 11:40:15 +02005069 h->intr[h->intr_mode], dac ? "" : " not");
Bjorn Helgaas40aabb52006-06-25 05:49:03 -07005070
Stephen M. Cameron54dae342011-05-03 14:53:05 -05005071 if (cciss_allocate_cmd_pool(h))
Linus Torvalds1da177e2005-04-16 15:20:36 -07005072 goto clean4;
Don Brace5c07a312009-11-12 12:50:01 -06005073
Stephen M. Cameronabf79662011-05-03 14:53:10 -05005074 if (cciss_allocate_scatterlists(h))
Dan Carpenter4ee698512010-08-23 12:28:15 +02005075 goto clean4;
5076
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005077 h->cmd_sg_list = cciss_allocate_sg_chain_blocks(h,
5078 h->chainsize, h->nr_cmds);
5079 if (!h->cmd_sg_list && h->chainsize > 0)
Don Brace5c07a312009-11-12 12:50:01 -06005080 goto clean4;
Don Brace5c07a312009-11-12 12:50:01 -06005081
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005082 spin_lock_init(&h->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005083
Bjorn Helgaas7c832832006-06-25 05:49:06 -07005084 /* Initialize the pdev driver private data.
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005085 have it point to h. */
5086 pci_set_drvdata(pdev, h);
Bjorn Helgaas7c832832006-06-25 05:49:06 -07005087 /* command and error info recs zeroed out before
5088 they are used */
Akinobu Mita1f118bc2012-11-08 16:12:22 -08005089 bitmap_zero(h->cmd_pool_bits, h->nr_cmds);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005090
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005091 h->num_luns = 0;
5092 h->highest_lun = -1;
Mike Miller6ae5ce82008-08-04 11:54:52 +02005093 for (j = 0; j < CISS_MAX_LUN; j++) {
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005094 h->drv[j] = NULL;
5095 h->gendisk[j] = NULL;
Mike Miller6ae5ce82008-08-04 11:54:52 +02005096 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07005097
Stephen M. Cameron5afe2782011-05-03 14:53:52 -05005098 /* At this point, the controller is ready to take commands.
5099 * Now, if reset_devices and the hard reset didn't work, try
5100 * the soft reset and see if that works.
5101 */
5102 if (try_soft_reset) {
5103
5104 /* This is kind of gross. We may or may not get a completion
5105 * from the soft reset command, and if we do, then the value
5106 * from the fifo may or may not be valid. So, we wait 10 secs
5107 * after the reset throwing away any completions we get during
5108 * that time. Unregister the interrupt handler and register
5109 * fake ones to scoop up any residual completions.
5110 */
5111 spin_lock_irqsave(&h->lock, flags);
5112 h->access.set_intr_mask(h, CCISS_INTR_OFF);
5113 spin_unlock_irqrestore(&h->lock, flags);
Joseph Handzik13049532011-08-08 11:40:15 +02005114 free_irq(h->intr[h->intr_mode], h);
Stephen M. Cameron5afe2782011-05-03 14:53:52 -05005115 rc = cciss_request_irq(h, cciss_msix_discard_completions,
5116 cciss_intx_discard_completions);
5117 if (rc) {
5118 dev_warn(&h->pdev->dev, "Failed to request_irq after "
5119 "soft reset.\n");
5120 goto clean4;
5121 }
5122
5123 rc = cciss_kdump_soft_reset(h);
5124 if (rc) {
5125 dev_warn(&h->pdev->dev, "Soft reset failed.\n");
5126 goto clean4;
5127 }
5128
5129 dev_info(&h->pdev->dev, "Board READY.\n");
5130 dev_info(&h->pdev->dev,
5131 "Waiting for stale completions to drain.\n");
5132 h->access.set_intr_mask(h, CCISS_INTR_ON);
5133 msleep(10000);
5134 h->access.set_intr_mask(h, CCISS_INTR_OFF);
5135
5136 rc = controller_reset_failed(h->cfgtable);
5137 if (rc)
5138 dev_info(&h->pdev->dev,
5139 "Soft reset appears to have failed.\n");
5140
5141 /* since the controller's reset, we have to go back and re-init
5142 * everything. Easiest to just forget what we've done and do it
5143 * all over again.
5144 */
5145 cciss_undo_allocations_after_kdump_soft_reset(h);
5146 try_soft_reset = 0;
5147 if (rc)
5148 /* don't go to clean4, we already unallocated */
5149 return -ENODEV;
5150
5151 goto reinit_after_soft_reset;
5152 }
5153
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005154 cciss_scsi_setup(h);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005155
5156 /* Turn the interrupts on so we can service requests */
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005157 h->access.set_intr_mask(h, CCISS_INTR_ON);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005158
Mike Miller22bece02008-11-06 12:53:25 -08005159 /* Get the firmware version */
5160 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
5161 if (inq_buff == NULL) {
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05005162 dev_err(&h->pdev->dev, "out of memory\n");
Mike Miller22bece02008-11-06 12:53:25 -08005163 goto clean4;
5164 }
5165
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005166 return_code = sendcmd_withirq(h, CISS_INQUIRY, inq_buff,
scameron@beardog.cca.cpqcorp.netb57695f2009-06-08 16:02:17 -05005167 sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD);
Mike Miller22bece02008-11-06 12:53:25 -08005168 if (return_code == IO_OK) {
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005169 h->firm_ver[0] = inq_buff->data_byte[32];
5170 h->firm_ver[1] = inq_buff->data_byte[33];
5171 h->firm_ver[2] = inq_buff->data_byte[34];
5172 h->firm_ver[3] = inq_buff->data_byte[35];
Mike Miller22bece02008-11-06 12:53:25 -08005173 } else { /* send command failed */
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05005174 dev_warn(&h->pdev->dev, "unable to determine firmware"
Mike Miller22bece02008-11-06 12:53:25 -08005175 " version of controller\n");
5176 }
Eric Dumazet212a5022009-08-24 10:01:53 +02005177 kfree(inq_buff);
Mike Miller22bece02008-11-06 12:53:25 -08005178
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005179 cciss_procinit(h);
Mike Miller92c4231a2006-12-06 20:35:06 -08005180
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005181 h->cciss_max_sectors = 8192;
Mike Miller92c4231a2006-12-06 20:35:06 -08005182
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005183 rebuild_lun_table(h, 1, 0);
Stephen M. Cameron0007a4c2011-11-16 09:21:49 +01005184 cciss_engage_scsi(h);
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005185 h->busy_initializing = 0;
Bjorn Helgaase2019b52006-06-25 05:49:05 -07005186 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005187
Mike Miller6ae5ce82008-08-04 11:54:52 +02005188clean4:
Stephen M. Cameron54dae342011-05-03 14:53:05 -05005189 cciss_free_cmd_pool(h);
Stephen M. Cameronabf79662011-05-03 14:53:10 -05005190 cciss_free_scatterlists(h);
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005191 cciss_free_sg_chain_blocks(h->cmd_sg_list, h->nr_cmds);
Joseph Handzik13049532011-08-08 11:40:15 +02005192 free_irq(h->intr[h->intr_mode], h);
Mike Miller6ae5ce82008-08-04 11:54:52 +02005193clean2:
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005194 unregister_blkdev(h->major, h->devname);
Mike Miller6ae5ce82008-08-04 11:54:52 +02005195clean1:
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005196 cciss_destroy_hba_sysfs_entry(h);
Andrew Patterson7fe06322009-06-02 14:48:39 +02005197clean0:
Stephen M. Cameron2cfa9482009-10-13 09:18:22 +02005198 pci_release_regions(pdev);
5199clean_no_release_regions:
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005200 h->busy_initializing = 0;
Stephen M. Cameron9cef0d22009-09-17 13:48:31 -05005201
Mike Miller872225c2006-12-13 00:34:22 -08005202 /*
5203 * Deliberately omit pci_disable_device(): it does something nasty to
5204 * Smart Array controllers that pci_enable_device does not undo
5205 */
Mike Miller799202c2006-12-06 20:35:12 -08005206 pci_set_drvdata(pdev, NULL);
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005207 free_hba(h);
Bjorn Helgaase2019b52006-06-25 05:49:05 -07005208 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005209}
5210
Gerald Brittone9ca75b2007-05-14 13:53:01 -04005211static void cciss_shutdown(struct pci_dev *pdev)
5212{
Stephen M. Cameron29009a02009-11-12 12:49:35 -06005213 ctlr_info_t *h;
5214 char *flush_buf;
Gerald Brittone9ca75b2007-05-14 13:53:01 -04005215 int return_code;
5216
Stephen M. Cameron29009a02009-11-12 12:49:35 -06005217 h = pci_get_drvdata(pdev);
5218 flush_buf = kzalloc(4, GFP_KERNEL);
5219 if (!flush_buf) {
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05005220 dev_warn(&h->pdev->dev, "cache not flushed, out of memory.\n");
Gerald Brittone9ca75b2007-05-14 13:53:01 -04005221 return;
Gerald Brittone9ca75b2007-05-14 13:53:01 -04005222 }
Stephen M. Cameron29009a02009-11-12 12:49:35 -06005223 /* write all data in the battery backed cache to disk */
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005224 return_code = sendcmd_withirq(h, CCISS_CACHE_FLUSH, flush_buf,
Stephen M. Cameron29009a02009-11-12 12:49:35 -06005225 4, 0, CTLR_LUNID, TYPE_CMD);
5226 kfree(flush_buf);
5227 if (return_code != IO_OK)
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05005228 dev_warn(&h->pdev->dev, "Error flushing cache\n");
Stephen M. Cameron29009a02009-11-12 12:49:35 -06005229 h->access.set_intr_mask(h, CCISS_INTR_OFF);
Joseph Handzik13049532011-08-08 11:40:15 +02005230 free_irq(h->intr[h->intr_mode], h);
Gerald Brittone9ca75b2007-05-14 13:53:01 -04005231}
5232
Greg Kroah-Hartman8d85fce2012-12-21 15:13:49 -08005233static int cciss_enter_simple_mode(struct ctlr_info *h)
Joseph Handzik13049532011-08-08 11:40:15 +02005234{
5235 u32 trans_support;
5236
5237 trans_support = readl(&(h->cfgtable->TransportSupport));
5238 if (!(trans_support & SIMPLE_MODE))
5239 return -ENOTSUPP;
5240
5241 h->max_commands = readl(&(h->cfgtable->CmdsOutMax));
5242 writel(CFGTBL_Trans_Simple, &(h->cfgtable->HostWrite.TransportRequest));
5243 writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
5244 cciss_wait_for_mode_change_ack(h);
5245 print_cfg_table(h);
5246 if (!(readl(&(h->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
5247 dev_warn(&h->pdev->dev, "unable to get board into simple mode\n");
5248 return -ENODEV;
5249 }
5250 h->transMethod = CFGTBL_Trans_Simple;
5251 return 0;
5252}
5253
5254
Greg Kroah-Hartman8d85fce2012-12-21 15:13:49 -08005255static void cciss_remove_one(struct pci_dev *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07005256{
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005257 ctlr_info_t *h;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005258 int i, j;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005259
Bjorn Helgaas7c832832006-06-25 05:49:06 -07005260 if (pci_get_drvdata(pdev) == NULL) {
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05005261 dev_err(&pdev->dev, "Unable to remove device\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07005262 return;
5263 }
Mike Miller0a9279c2009-04-02 12:50:55 -07005264
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005265 h = pci_get_drvdata(pdev);
5266 i = h->ctlr;
Bjorn Helgaas7c832832006-06-25 05:49:06 -07005267 if (hba[i] == NULL) {
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05005268 dev_err(&pdev->dev, "device appears to already be removed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07005269 return;
5270 }
Bjorn Helgaasb6550772007-04-11 23:28:43 -07005271
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005272 mutex_lock(&h->busy_shutting_down);
Mike Miller0a9279c2009-04-02 12:50:55 -07005273
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005274 remove_from_scan_list(h);
5275 remove_proc_entry(h->devname, proc_cciss);
5276 unregister_blkdev(h->major, h->devname);
Bjorn Helgaasb6550772007-04-11 23:28:43 -07005277
5278 /* remove it from the disk list */
5279 for (j = 0; j < CISS_MAX_LUN; j++) {
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005280 struct gendisk *disk = h->gendisk[j];
Bjorn Helgaasb6550772007-04-11 23:28:43 -07005281 if (disk) {
Jens Axboe165125e2007-07-24 09:28:11 +02005282 struct request_queue *q = disk->queue;
Bjorn Helgaasb6550772007-04-11 23:28:43 -07005283
Stephen M. Cameron097d0262009-09-17 13:47:19 -05005284 if (disk->flags & GENHD_FL_UP) {
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005285 cciss_destroy_ld_sysfs_entry(h, j, 1);
Bjorn Helgaasb6550772007-04-11 23:28:43 -07005286 del_gendisk(disk);
Stephen M. Cameron097d0262009-09-17 13:47:19 -05005287 }
Bjorn Helgaasb6550772007-04-11 23:28:43 -07005288 if (q)
5289 blk_cleanup_queue(q);
5290 }
5291 }
5292
Mike Millerba198ef2008-08-04 11:54:55 +02005293#ifdef CONFIG_CISS_SCSI_TAPE
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005294 cciss_unregister_scsi(h); /* unhook from SCSI subsystem */
Mike Millerba198ef2008-08-04 11:54:55 +02005295#endif
Bjorn Helgaasb6550772007-04-11 23:28:43 -07005296
Gerald Brittone9ca75b2007-05-14 13:53:01 -04005297 cciss_shutdown(pdev);
Mike Millerfb86a352006-01-08 01:03:50 -08005298
5299#ifdef CONFIG_PCI_MSI
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005300 if (h->msix_vector)
5301 pci_disable_msix(h->pdev);
5302 else if (h->msi_vector)
5303 pci_disable_msi(h->pdev);
Bjorn Helgaas7c832832006-06-25 05:49:06 -07005304#endif /* CONFIG_PCI_MSI */
Mike Millerfb86a352006-01-08 01:03:50 -08005305
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005306 iounmap(h->transtable);
5307 iounmap(h->cfgtable);
5308 iounmap(h->vaddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005309
Stephen M. Cameron54dae342011-05-03 14:53:05 -05005310 cciss_free_cmd_pool(h);
Don Brace5c07a312009-11-12 12:50:01 -06005311 /* Free up sg elements */
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005312 for (j = 0; j < h->nr_cmds; j++)
5313 kfree(h->scatter_list[j]);
5314 kfree(h->scatter_list);
5315 cciss_free_sg_chain_blocks(h->cmd_sg_list, h->nr_cmds);
Stephen M. Camerone363e012011-05-03 14:53:21 -05005316 kfree(h->blockFetchTable);
5317 if (h->reply_pool)
5318 pci_free_consistent(h->pdev, h->max_commands * sizeof(__u64),
5319 h->reply_pool, h->reply_pool_dhandle);
Mike Miller872225c2006-12-13 00:34:22 -08005320 /*
5321 * Deliberately omit pci_disable_device(): it does something nasty to
5322 * Smart Array controllers that pci_enable_device does not undo
5323 */
Bjorn Helgaas7c832832006-06-25 05:49:06 -07005324 pci_release_regions(pdev);
Bjorn Helgaas4e570302006-06-25 05:49:02 -07005325 pci_set_drvdata(pdev, NULL);
Stephen M. Cameronf70dba82010-07-19 13:46:38 -05005326 cciss_destroy_hba_sysfs_entry(h);
5327 mutex_unlock(&h->busy_shutting_down);
5328 free_hba(h);
Bjorn Helgaas7c832832006-06-25 05:49:06 -07005329}
Linus Torvalds1da177e2005-04-16 15:20:36 -07005330
5331static struct pci_driver cciss_pci_driver = {
Bjorn Helgaas7c832832006-06-25 05:49:06 -07005332 .name = "cciss",
5333 .probe = cciss_init_one,
Greg Kroah-Hartman8d85fce2012-12-21 15:13:49 -08005334 .remove = cciss_remove_one,
Bjorn Helgaas7c832832006-06-25 05:49:06 -07005335 .id_table = cciss_pci_device_id, /* id_table */
Gerald Brittone9ca75b2007-05-14 13:53:01 -04005336 .shutdown = cciss_shutdown,
Linus Torvalds1da177e2005-04-16 15:20:36 -07005337};
5338
5339/*
5340 * This is it. Register the PCI driver information for the cards we control
Bjorn Helgaas7c832832006-06-25 05:49:06 -07005341 * the OS will call our registered routines when it finds one of our cards.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005342 */
5343static int __init cciss_init(void)
5344{
Andrew Patterson7fe06322009-06-02 14:48:39 +02005345 int err;
5346
Jens Axboe10cbda92009-02-27 20:14:20 +01005347 /*
5348 * The hardware requires that commands are aligned on a 64-bit
5349 * boundary. Given that we use pci_alloc_consistent() to allocate an
5350 * array of them, the size must be a multiple of 8 bytes.
5351 */
Stephen M. Cameron1b7d0d22010-02-26 16:01:17 -06005352 BUILD_BUG_ON(sizeof(CommandList_struct) % COMMANDLIST_ALIGNMENT);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005353 printk(KERN_INFO DRIVER_NAME "\n");
5354
Andrew Patterson7fe06322009-06-02 14:48:39 +02005355 err = bus_register(&cciss_bus_type);
5356 if (err)
5357 return err;
5358
Andrew Pattersonb368c9d2009-09-17 13:46:58 -05005359 /* Start the scan thread */
5360 cciss_scan_thread = kthread_run(scan_thread, NULL, "cciss_scan");
5361 if (IS_ERR(cciss_scan_thread)) {
5362 err = PTR_ERR(cciss_scan_thread);
5363 goto err_bus_unregister;
5364 }
5365
Linus Torvalds1da177e2005-04-16 15:20:36 -07005366 /* Register for our PCI devices */
Andrew Patterson7fe06322009-06-02 14:48:39 +02005367 err = pci_register_driver(&cciss_pci_driver);
5368 if (err)
Andrew Pattersonb368c9d2009-09-17 13:46:58 -05005369 goto err_thread_stop;
Andrew Patterson7fe06322009-06-02 14:48:39 +02005370
Stephen M. Cameron617e1342009-09-17 13:47:14 -05005371 return err;
Andrew Patterson7fe06322009-06-02 14:48:39 +02005372
Andrew Pattersonb368c9d2009-09-17 13:46:58 -05005373err_thread_stop:
5374 kthread_stop(cciss_scan_thread);
5375err_bus_unregister:
Andrew Patterson7fe06322009-06-02 14:48:39 +02005376 bus_unregister(&cciss_bus_type);
Andrew Pattersonb368c9d2009-09-17 13:46:58 -05005377
Andrew Patterson7fe06322009-06-02 14:48:39 +02005378 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005379}
5380
5381static void __exit cciss_cleanup(void)
5382{
5383 int i;
5384
5385 pci_unregister_driver(&cciss_pci_driver);
5386 /* double check that all controller entrys have been removed */
Bjorn Helgaas7c832832006-06-25 05:49:06 -07005387 for (i = 0; i < MAX_CTLR; i++) {
5388 if (hba[i] != NULL) {
Stephen M. Cameronb2a4a432010-07-19 13:46:48 -05005389 dev_warn(&hba[i]->pdev->dev,
5390 "had to remove controller\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07005391 cciss_remove_one(hba[i]->pdev);
5392 }
5393 }
Andrew Pattersonb368c9d2009-09-17 13:46:58 -05005394 kthread_stop(cciss_scan_thread);
Jens Axboe90fdb0b2010-11-08 14:29:13 +01005395 if (proc_cciss)
5396 remove_proc_entry("driver/cciss", NULL);
Andrew Patterson7fe06322009-06-02 14:48:39 +02005397 bus_unregister(&cciss_bus_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005398}
5399
Linus Torvalds1da177e2005-04-16 15:20:36 -07005400module_init(cciss_init);
5401module_exit(cciss_cleanup);