| /* |
| * sbp2.c - SBP-2 protocol driver for IEEE-1394 |
| * |
| * Copyright (C) 2000 James Goodwin, Filanet Corporation (www.filanet.com) |
| * jamesg@filanet.com (JSG) |
| * |
| * Copyright (C) 2003 Ben Collins <bcollins@debian.org> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software Foundation, |
| * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| */ |
| |
| /* |
| * Brief Description: |
| * |
| * This driver implements the Serial Bus Protocol 2 (SBP-2) over IEEE-1394 |
| * under Linux. The SBP-2 driver is implemented as an IEEE-1394 high-level |
| * driver. It also registers as a SCSI lower-level driver in order to accept |
| * SCSI commands for transport using SBP-2. |
| * |
| * You may access any attached SBP-2 storage devices as if they were SCSI |
| * devices (e.g. mount /dev/sda1, fdisk, mkfs, etc.). |
| * |
| * Current Issues: |
| * |
| * - Error Handling: SCSI aborts and bus reset requests are handled somewhat |
| * but the code needs additional debugging. |
| */ |
| |
| #include <linux/config.h> |
| #include <linux/kernel.h> |
| #include <linux/list.h> |
| #include <linux/string.h> |
| #include <linux/slab.h> |
| #include <linux/interrupt.h> |
| #include <linux/fs.h> |
| #include <linux/poll.h> |
| #include <linux/module.h> |
| #include <linux/moduleparam.h> |
| #include <linux/types.h> |
| #include <linux/delay.h> |
| #include <linux/sched.h> |
| #include <linux/blkdev.h> |
| #include <linux/smp_lock.h> |
| #include <linux/init.h> |
| #include <linux/pci.h> |
| |
| #include <asm/current.h> |
| #include <asm/uaccess.h> |
| #include <asm/io.h> |
| #include <asm/byteorder.h> |
| #include <asm/atomic.h> |
| #include <asm/system.h> |
| #include <asm/scatterlist.h> |
| |
| #include <scsi/scsi.h> |
| #include <scsi/scsi_cmnd.h> |
| #include <scsi/scsi_dbg.h> |
| #include <scsi/scsi_device.h> |
| #include <scsi/scsi_host.h> |
| |
| #include "csr1212.h" |
| #include "ieee1394.h" |
| #include "ieee1394_types.h" |
| #include "ieee1394_core.h" |
| #include "nodemgr.h" |
| #include "hosts.h" |
| #include "highlevel.h" |
| #include "ieee1394_transactions.h" |
| #include "sbp2.h" |
| |
| /* |
| * Module load parameter definitions |
| */ |
| |
| /* |
| * Change max_speed on module load if you have a bad IEEE-1394 |
| * controller that has trouble running 2KB packets at 400mb. |
| * |
| * NOTE: On certain OHCI parts I have seen short packets on async transmit |
| * (probably due to PCI latency/throughput issues with the part). You can |
| * bump down the speed if you are running into problems. |
| */ |
| static int max_speed = IEEE1394_SPEED_MAX; |
| module_param(max_speed, int, 0644); |
| MODULE_PARM_DESC(max_speed, "Force max speed (3 = 800mb, 2 = 400mb, 1 = 200mb, 0 = 100mb)"); |
| |
| /* |
| * Set serialize_io to 1 if you'd like only one scsi command sent |
| * down to us at a time (debugging). This might be necessary for very |
| * badly behaved sbp2 devices. |
| * |
| * TODO: Make this configurable per device. |
| */ |
| static int serialize_io = 1; |
| module_param(serialize_io, int, 0444); |
| MODULE_PARM_DESC(serialize_io, "Serialize I/O coming from scsi drivers (default = 1, faster = 0)"); |
| |
| /* |
| * Bump up max_sectors if you'd like to support very large sized |
| * transfers. Please note that some older sbp2 bridge chips are broken for |
| * transfers greater or equal to 128KB. Default is a value of 255 |
| * sectors, or just under 128KB (at 512 byte sector size). I can note that |
| * the Oxsemi sbp2 chipsets have no problems supporting very large |
| * transfer sizes. |
| */ |
| static int max_sectors = SBP2_MAX_SECTORS; |
| module_param(max_sectors, int, 0444); |
| MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported (default = 255)"); |
| |
| /* |
| * Exclusive login to sbp2 device? In most cases, the sbp2 driver should |
| * do an exclusive login, as it's generally unsafe to have two hosts |
| * talking to a single sbp2 device at the same time (filesystem coherency, |
| * etc.). If you're running an sbp2 device that supports multiple logins, |
| * and you're either running read-only filesystems or some sort of special |
| * filesystem supporting multiple hosts (one such filesystem is OpenGFS, |
| * see opengfs.sourceforge.net for more info), then set exclusive_login |
| * to zero. Note: The Oxsemi OXFW911 sbp2 chipset supports up to four |
| * concurrent logins. |
| */ |
| static int exclusive_login = 1; |
| module_param(exclusive_login, int, 0644); |
| MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device (default = 1)"); |
| |
| /* |
| * SCSI inquiry hack for really badly behaved sbp2 devices. Turn this on |
| * if your sbp2 device is not properly handling the SCSI inquiry command. |
| * This hack makes the inquiry look more like a typical MS Windows |
| * inquiry. |
| * |
| * If force_inquiry_hack=1 is required for your device to work, |
| * please submit the logged sbp2_firmware_revision value of this device to |
| * the linux1394-devel mailing list. |
| */ |
| static int force_inquiry_hack; |
| module_param(force_inquiry_hack, int, 0444); |
| MODULE_PARM_DESC(force_inquiry_hack, "Force SCSI inquiry hack (default = 0)"); |
| |
| /* |
| * Export information about protocols/devices supported by this driver. |
| */ |
| static struct ieee1394_device_id sbp2_id_table[] = { |
| { |
| .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION, |
| .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff, |
| .version = SBP2_SW_VERSION_ENTRY & 0xffffff}, |
| {} |
| }; |
| |
| MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); |
| |
| /* |
| * Debug levels, configured via kernel config, or enable here. |
| */ |
| |
| #define CONFIG_IEEE1394_SBP2_DEBUG 0 |
| /* #define CONFIG_IEEE1394_SBP2_DEBUG_ORBS */ |
| /* #define CONFIG_IEEE1394_SBP2_DEBUG_DMA */ |
| /* #define CONFIG_IEEE1394_SBP2_DEBUG 1 */ |
| /* #define CONFIG_IEEE1394_SBP2_DEBUG 2 */ |
| /* #define CONFIG_IEEE1394_SBP2_PACKET_DUMP */ |
| |
| #ifdef CONFIG_IEEE1394_SBP2_DEBUG_ORBS |
| #define SBP2_ORB_DEBUG(fmt, args...) HPSB_ERR("sbp2(%s): "fmt, __FUNCTION__, ## args) |
| static u32 global_outstanding_command_orbs = 0; |
| #define outstanding_orb_incr global_outstanding_command_orbs++ |
| #define outstanding_orb_decr global_outstanding_command_orbs-- |
| #else |
| #define SBP2_ORB_DEBUG(fmt, args...) |
| #define outstanding_orb_incr |
| #define outstanding_orb_decr |
| #endif |
| |
| #ifdef CONFIG_IEEE1394_SBP2_DEBUG_DMA |
| #define SBP2_DMA_ALLOC(fmt, args...) \ |
| HPSB_ERR("sbp2(%s)alloc(%d): "fmt, __FUNCTION__, \ |
| ++global_outstanding_dmas, ## args) |
| #define SBP2_DMA_FREE(fmt, args...) \ |
| HPSB_ERR("sbp2(%s)free(%d): "fmt, __FUNCTION__, \ |
| --global_outstanding_dmas, ## args) |
| static u32 global_outstanding_dmas = 0; |
| #else |
| #define SBP2_DMA_ALLOC(fmt, args...) |
| #define SBP2_DMA_FREE(fmt, args...) |
| #endif |
| |
| #if CONFIG_IEEE1394_SBP2_DEBUG >= 2 |
| #define SBP2_DEBUG(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) |
| #define SBP2_INFO(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) |
| #define SBP2_NOTICE(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) |
| #define SBP2_WARN(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) |
| #elif CONFIG_IEEE1394_SBP2_DEBUG == 1 |
| #define SBP2_DEBUG(fmt, args...) HPSB_DEBUG("sbp2: "fmt, ## args) |
| #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args) |
| #define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args) |
| #define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args) |
| #else |
| #define SBP2_DEBUG(fmt, args...) |
| #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args) |
| #define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args) |
| #define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args) |
| #endif |
| |
| #define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) |
| |
| /* |
| * Globals |
| */ |
| |
| static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id, |
| u32 status); |
| |
| static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id, |
| u32 scsi_status, struct scsi_cmnd *SCpnt, |
| void (*done)(struct scsi_cmnd *)); |
| |
| static struct scsi_host_template scsi_driver_template; |
| |
| static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC }; |
| |
| static void sbp2_host_reset(struct hpsb_host *host); |
| |
| static int sbp2_probe(struct device *dev); |
| static int sbp2_remove(struct device *dev); |
| static int sbp2_update(struct unit_directory *ud); |
| |
| static struct hpsb_highlevel sbp2_highlevel = { |
| .name = SBP2_DEVICE_NAME, |
| .host_reset = sbp2_host_reset, |
| }; |
| |
| static struct hpsb_address_ops sbp2_ops = { |
| .write = sbp2_handle_status_write |
| }; |
| |
| #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA |
| static struct hpsb_address_ops sbp2_physdma_ops = { |
| .read = sbp2_handle_physdma_read, |
| .write = sbp2_handle_physdma_write, |
| }; |
| #endif |
| |
| static struct hpsb_protocol_driver sbp2_driver = { |
| .name = "SBP2 Driver", |
| .id_table = sbp2_id_table, |
| .update = sbp2_update, |
| .driver = { |
| .name = SBP2_DEVICE_NAME, |
| .bus = &ieee1394_bus_type, |
| .probe = sbp2_probe, |
| .remove = sbp2_remove, |
| }, |
| }; |
| |
| |
| /* List of device firmware's that require a forced 36 byte inquiry. */ |
| static u32 sbp2_broken_inquiry_list[] = { |
| 0x00002800, /* Stefan Richter <richtest@bauwesen.tu-cottbus.de> */ |
| /* DViCO Momobay CX-1 */ |
| 0x00000200 /* Andreas Plesch <plesch@fas.harvard.edu> */ |
| /* QPS Fire DVDBurner */ |
| }; |
| |
| #define NUM_BROKEN_INQUIRY_DEVS \ |
| (sizeof(sbp2_broken_inquiry_list)/sizeof(*sbp2_broken_inquiry_list)) |
| |
| /************************************** |
| * General utility functions |
| **************************************/ |
| |
| #ifndef __BIG_ENDIAN |
| /* |
| * Converts a buffer from be32 to cpu byte ordering. Length is in bytes. |
| */ |
| static __inline__ void sbp2util_be32_to_cpu_buffer(void *buffer, int length) |
| { |
| u32 *temp = buffer; |
| |
| for (length = (length >> 2); length--; ) |
| temp[length] = be32_to_cpu(temp[length]); |
| |
| return; |
| } |
| |
| /* |
| * Converts a buffer from cpu to be32 byte ordering. Length is in bytes. |
| */ |
| static __inline__ void sbp2util_cpu_to_be32_buffer(void *buffer, int length) |
| { |
| u32 *temp = buffer; |
| |
| for (length = (length >> 2); length--; ) |
| temp[length] = cpu_to_be32(temp[length]); |
| |
| return; |
| } |
| #else /* BIG_ENDIAN */ |
| /* Why waste the cpu cycles? */ |
| #define sbp2util_be32_to_cpu_buffer(x,y) |
| #define sbp2util_cpu_to_be32_buffer(x,y) |
| #endif |
| |
| #ifdef CONFIG_IEEE1394_SBP2_PACKET_DUMP |
| /* |
| * Debug packet dump routine. Length is in bytes. |
| */ |
| static void sbp2util_packet_dump(void *buffer, int length, char *dump_name, |
| u32 dump_phys_addr) |
| { |
| int i; |
| unsigned char *dump = buffer; |
| |
| if (!dump || !length || !dump_name) |
| return; |
| |
| if (dump_phys_addr) |
| printk("[%s, 0x%x]", dump_name, dump_phys_addr); |
| else |
| printk("[%s]", dump_name); |
| for (i = 0; i < length; i++) { |
| if (i > 0x3f) { |
| printk("\n ..."); |
| break; |
| } |
| if ((i & 0x3) == 0) |
| printk(" "); |
| if ((i & 0xf) == 0) |
| printk("\n "); |
| printk("%02x ", (int)dump[i]); |
| } |
| printk("\n"); |
| |
| return; |
| } |
| #else |
| #define sbp2util_packet_dump(w,x,y,z) |
| #endif |
| |
| /* |
| * Goofy routine that basically does a down_timeout function. |
| */ |
| static int sbp2util_down_timeout(atomic_t *done, int timeout) |
| { |
| int i; |
| |
| for (i = timeout; (i > 0 && atomic_read(done) == 0); i-= HZ/10) { |
| if (msleep_interruptible(100)) /* 100ms */ |
| return 1; |
| } |
| return (i > 0) ? 0 : 1; |
| } |
| |
| /* Free's an allocated packet */ |
| static void sbp2_free_packet(struct hpsb_packet *packet) |
| { |
| hpsb_free_tlabel(packet); |
| hpsb_free_packet(packet); |
| } |
| |
| /* This is much like hpsb_node_write(), except it ignores the response |
| * subaction and returns immediately. Can be used from interrupts. |
| */ |
| static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr, |
| quadlet_t *buffer, size_t length) |
| { |
| struct hpsb_packet *packet; |
| |
| packet = hpsb_make_writepacket(ne->host, ne->nodeid, |
| addr, buffer, length); |
| if (!packet) |
| return -ENOMEM; |
| |
| hpsb_set_packet_complete_task(packet, |
| (void (*)(void *))sbp2_free_packet, |
| packet); |
| |
| hpsb_node_fill_packet(ne, packet); |
| |
| if (hpsb_send_packet(packet) < 0) { |
| sbp2_free_packet(packet); |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * This function is called to create a pool of command orbs used for |
| * command processing. It is called when a new sbp2 device is detected. |
| */ |
| static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data *scsi_id) |
| { |
| struct sbp2scsi_host_info *hi = scsi_id->hi; |
| int i; |
| unsigned long flags, orbs; |
| struct sbp2_command_info *command; |
| |
| orbs = serialize_io ? 2 : SBP2_MAX_CMDS; |
| |
| spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
| for (i = 0; i < orbs; i++) { |
| command = kzalloc(sizeof(*command), GFP_ATOMIC); |
| if (!command) { |
| spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, |
| flags); |
| return -ENOMEM; |
| } |
| command->command_orb_dma = |
| pci_map_single(hi->host->pdev, &command->command_orb, |
| sizeof(struct sbp2_command_orb), |
| PCI_DMA_BIDIRECTIONAL); |
| SBP2_DMA_ALLOC("single command orb DMA"); |
| command->sge_dma = |
| pci_map_single(hi->host->pdev, |
| &command->scatter_gather_element, |
| sizeof(command->scatter_gather_element), |
| PCI_DMA_BIDIRECTIONAL); |
| SBP2_DMA_ALLOC("scatter_gather_element"); |
| INIT_LIST_HEAD(&command->list); |
| list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed); |
| } |
| spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
| return 0; |
| } |
| |
| /* |
| * This function is called to delete a pool of command orbs. |
| */ |
| static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data *scsi_id) |
| { |
| struct hpsb_host *host = scsi_id->hi->host; |
| struct list_head *lh, *next; |
| struct sbp2_command_info *command; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
| if (!list_empty(&scsi_id->sbp2_command_orb_completed)) { |
| list_for_each_safe(lh, next, &scsi_id->sbp2_command_orb_completed) { |
| command = list_entry(lh, struct sbp2_command_info, list); |
| |
| /* Release our generic DMA's */ |
| pci_unmap_single(host->pdev, command->command_orb_dma, |
| sizeof(struct sbp2_command_orb), |
| PCI_DMA_BIDIRECTIONAL); |
| SBP2_DMA_FREE("single command orb DMA"); |
| pci_unmap_single(host->pdev, command->sge_dma, |
| sizeof(command->scatter_gather_element), |
| PCI_DMA_BIDIRECTIONAL); |
| SBP2_DMA_FREE("scatter_gather_element"); |
| |
| kfree(command); |
| } |
| } |
| spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
| return; |
| } |
| |
| /* |
| * This function finds the sbp2_command for a given outstanding command |
| * orb.Only looks at the inuse list. |
| */ |
| static struct sbp2_command_info *sbp2util_find_command_for_orb( |
| struct scsi_id_instance_data *scsi_id, dma_addr_t orb) |
| { |
| struct sbp2_command_info *command; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
| if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) { |
| list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) { |
| if (command->command_orb_dma == orb) { |
| spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
| return command; |
| } |
| } |
| } |
| spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
| |
| SBP2_ORB_DEBUG("could not match command orb %x", (unsigned int)orb); |
| |
| return NULL; |
| } |
| |
| /* |
| * This function finds the sbp2_command for a given outstanding SCpnt. |
| * Only looks at the inuse list. |
| */ |
| static struct sbp2_command_info *sbp2util_find_command_for_SCpnt(struct scsi_id_instance_data *scsi_id, void *SCpnt) |
| { |
| struct sbp2_command_info *command; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
| if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) { |
| list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) { |
| if (command->Current_SCpnt == SCpnt) { |
| spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
| return command; |
| } |
| } |
| } |
| spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
| return NULL; |
| } |
| |
| /* |
| * This function allocates a command orb used to send a scsi command. |
| */ |
| static struct sbp2_command_info *sbp2util_allocate_command_orb( |
| struct scsi_id_instance_data *scsi_id, |
| struct scsi_cmnd *Current_SCpnt, |
| void (*Current_done)(struct scsi_cmnd *)) |
| { |
| struct list_head *lh; |
| struct sbp2_command_info *command = NULL; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
| if (!list_empty(&scsi_id->sbp2_command_orb_completed)) { |
| lh = scsi_id->sbp2_command_orb_completed.next; |
| list_del(lh); |
| command = list_entry(lh, struct sbp2_command_info, list); |
| command->Current_done = Current_done; |
| command->Current_SCpnt = Current_SCpnt; |
| list_add_tail(&command->list, &scsi_id->sbp2_command_orb_inuse); |
| } else { |
| SBP2_ERR("sbp2util_allocate_command_orb - No orbs available!"); |
| } |
| spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
| return command; |
| } |
| |
| /* Free our DMA's */ |
| static void sbp2util_free_command_dma(struct sbp2_command_info *command) |
| { |
| struct scsi_id_instance_data *scsi_id = |
| (struct scsi_id_instance_data *)command->Current_SCpnt->device->host->hostdata[0]; |
| struct hpsb_host *host; |
| |
| if (!scsi_id) { |
| printk(KERN_ERR "%s: scsi_id == NULL\n", __FUNCTION__); |
| return; |
| } |
| |
| host = scsi_id->ud->ne->host; |
| |
| if (command->cmd_dma) { |
| if (command->dma_type == CMD_DMA_SINGLE) { |
| pci_unmap_single(host->pdev, command->cmd_dma, |
| command->dma_size, command->dma_dir); |
| SBP2_DMA_FREE("single bulk"); |
| } else if (command->dma_type == CMD_DMA_PAGE) { |
| pci_unmap_page(host->pdev, command->cmd_dma, |
| command->dma_size, command->dma_dir); |
| SBP2_DMA_FREE("single page"); |
| } /* XXX: Check for CMD_DMA_NONE bug */ |
| command->dma_type = CMD_DMA_NONE; |
| command->cmd_dma = 0; |
| } |
| |
| if (command->sge_buffer) { |
| pci_unmap_sg(host->pdev, command->sge_buffer, |
| command->dma_size, command->dma_dir); |
| SBP2_DMA_FREE("scatter list"); |
| command->sge_buffer = NULL; |
| } |
| } |
| |
| /* |
| * This function moves a command to the completed orb list. |
| */ |
| static void sbp2util_mark_command_completed(struct scsi_id_instance_data *scsi_id, |
| struct sbp2_command_info *command) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
| list_del(&command->list); |
| sbp2util_free_command_dma(command); |
| list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed); |
| spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
| } |
| |
| /* |
| * Is scsi_id valid? Is the 1394 node still present? |
| */ |
| static inline int sbp2util_node_is_available(struct scsi_id_instance_data *scsi_id) |
| { |
| return scsi_id && scsi_id->ne && !scsi_id->ne->in_limbo; |
| } |
| |
| /********************************************* |
| * IEEE-1394 core driver stack related section |
| *********************************************/ |
| static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud); |
| |
| static int sbp2_probe(struct device *dev) |
| { |
| struct unit_directory *ud; |
| struct scsi_id_instance_data *scsi_id; |
| |
| SBP2_DEBUG("sbp2_probe"); |
| |
| ud = container_of(dev, struct unit_directory, device); |
| |
| /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s) |
| * instead. */ |
| if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY) |
| return -ENODEV; |
| |
| scsi_id = sbp2_alloc_device(ud); |
| |
| if (!scsi_id) |
| return -ENOMEM; |
| |
| sbp2_parse_unit_directory(scsi_id, ud); |
| |
| return sbp2_start_device(scsi_id); |
| } |
| |
| static int sbp2_remove(struct device *dev) |
| { |
| struct unit_directory *ud; |
| struct scsi_id_instance_data *scsi_id; |
| struct scsi_device *sdev; |
| |
| SBP2_DEBUG("sbp2_remove"); |
| |
| ud = container_of(dev, struct unit_directory, device); |
| scsi_id = ud->device.driver_data; |
| if (!scsi_id) |
| return 0; |
| |
| /* Trigger shutdown functions in scsi's highlevel. */ |
| if (scsi_id->scsi_host) |
| scsi_unblock_requests(scsi_id->scsi_host); |
| sdev = scsi_id->sdev; |
| if (sdev) { |
| scsi_id->sdev = NULL; |
| scsi_remove_device(sdev); |
| } |
| |
| sbp2_logout_device(scsi_id); |
| sbp2_remove_device(scsi_id); |
| |
| return 0; |
| } |
| |
| static int sbp2_update(struct unit_directory *ud) |
| { |
| struct scsi_id_instance_data *scsi_id = ud->device.driver_data; |
| |
| SBP2_DEBUG("sbp2_update"); |
| |
| if (sbp2_reconnect_device(scsi_id)) { |
| |
| /* |
| * Ok, reconnect has failed. Perhaps we didn't |
| * reconnect fast enough. Try doing a regular login, but |
| * first do a logout just in case of any weirdness. |
| */ |
| sbp2_logout_device(scsi_id); |
| |
| if (sbp2_login_device(scsi_id)) { |
| /* Login failed too, just fail, and the backend |
| * will call our sbp2_remove for us */ |
| SBP2_ERR("Failed to reconnect to sbp2 device!"); |
| return -EBUSY; |
| } |
| } |
| |
| /* Set max retries to something large on the device. */ |
| sbp2_set_busy_timeout(scsi_id); |
| |
| /* Do a SBP-2 fetch agent reset. */ |
| sbp2_agent_reset(scsi_id, 1); |
| |
| /* Get the max speed and packet size that we can use. */ |
| sbp2_max_speed_and_size(scsi_id); |
| |
| /* Complete any pending commands with busy (so they get |
| * retried) and remove them from our queue |
| */ |
| sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY); |
| |
| /* Make sure we unblock requests (since this is likely after a bus |
| * reset). */ |
| scsi_unblock_requests(scsi_id->scsi_host); |
| |
| return 0; |
| } |
| |
| /* This functions is called by the sbp2_probe, for each new device. We now |
| * allocate one scsi host for each scsi_id (unit directory). */ |
| static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud) |
| { |
| struct sbp2scsi_host_info *hi; |
| struct Scsi_Host *scsi_host = NULL; |
| struct scsi_id_instance_data *scsi_id = NULL; |
| |
| SBP2_DEBUG("sbp2_alloc_device"); |
| |
| scsi_id = kzalloc(sizeof(*scsi_id), GFP_KERNEL); |
| if (!scsi_id) { |
| SBP2_ERR("failed to create scsi_id"); |
| goto failed_alloc; |
| } |
| |
| scsi_id->ne = ud->ne; |
| scsi_id->ud = ud; |
| scsi_id->speed_code = IEEE1394_SPEED_100; |
| scsi_id->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100]; |
| atomic_set(&scsi_id->sbp2_login_complete, 0); |
| INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_inuse); |
| INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_completed); |
| INIT_LIST_HEAD(&scsi_id->scsi_list); |
| spin_lock_init(&scsi_id->sbp2_command_orb_lock); |
| scsi_id->sbp2_lun = 0; |
| |
| ud->device.driver_data = scsi_id; |
| |
| hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host); |
| if (!hi) { |
| hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host, sizeof(*hi)); |
| if (!hi) { |
| SBP2_ERR("failed to allocate hostinfo"); |
| goto failed_alloc; |
| } |
| SBP2_DEBUG("sbp2_alloc_device: allocated hostinfo"); |
| hi->host = ud->ne->host; |
| INIT_LIST_HEAD(&hi->scsi_ids); |
| |
| /* Register our sbp2 status address space... */ |
| hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, &sbp2_ops, |
| SBP2_STATUS_FIFO_ADDRESS, |
| SBP2_STATUS_FIFO_ADDRESS + |
| SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(SBP2_MAX_UDS_PER_NODE+1)); |
| #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA |
| /* Handle data movement if physical dma is not |
| * enabled/supportedon host controller */ |
| hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, &sbp2_physdma_ops, |
| 0x0ULL, 0xfffffffcULL); |
| #endif |
| } |
| |
| scsi_id->hi = hi; |
| |
| list_add_tail(&scsi_id->scsi_list, &hi->scsi_ids); |
| |
| /* Register our host with the SCSI stack. */ |
| scsi_host = scsi_host_alloc(&scsi_driver_template, |
| sizeof(unsigned long)); |
| if (!scsi_host) { |
| SBP2_ERR("failed to register scsi host"); |
| goto failed_alloc; |
| } |
| |
| scsi_host->hostdata[0] = (unsigned long)scsi_id; |
| |
| if (!scsi_add_host(scsi_host, &ud->device)) { |
| scsi_id->scsi_host = scsi_host; |
| return scsi_id; |
| } |
| |
| SBP2_ERR("failed to add scsi host"); |
| scsi_host_put(scsi_host); |
| |
| failed_alloc: |
| sbp2_remove_device(scsi_id); |
| return NULL; |
| } |
| |
| static void sbp2_host_reset(struct hpsb_host *host) |
| { |
| struct sbp2scsi_host_info *hi; |
| struct scsi_id_instance_data *scsi_id; |
| |
| hi = hpsb_get_hostinfo(&sbp2_highlevel, host); |
| |
| if (hi) { |
| list_for_each_entry(scsi_id, &hi->scsi_ids, scsi_list) |
| scsi_block_requests(scsi_id->scsi_host); |
| } |
| } |
| |
| /* |
| * This function is where we first pull the node unique ids, and then |
| * allocate memory and register a SBP-2 device. |
| */ |
| static int sbp2_start_device(struct scsi_id_instance_data *scsi_id) |
| { |
| struct sbp2scsi_host_info *hi = scsi_id->hi; |
| int error; |
| |
| SBP2_DEBUG("sbp2_start_device"); |
| |
| /* Login FIFO DMA */ |
| scsi_id->login_response = |
| pci_alloc_consistent(hi->host->pdev, |
| sizeof(struct sbp2_login_response), |
| &scsi_id->login_response_dma); |
| if (!scsi_id->login_response) |
| goto alloc_fail; |
| SBP2_DMA_ALLOC("consistent DMA region for login FIFO"); |
| |
| /* Query logins ORB DMA */ |
| scsi_id->query_logins_orb = |
| pci_alloc_consistent(hi->host->pdev, |
| sizeof(struct sbp2_query_logins_orb), |
| &scsi_id->query_logins_orb_dma); |
| if (!scsi_id->query_logins_orb) |
| goto alloc_fail; |
| SBP2_DMA_ALLOC("consistent DMA region for query logins ORB"); |
| |
| /* Query logins response DMA */ |
| scsi_id->query_logins_response = |
| pci_alloc_consistent(hi->host->pdev, |
| sizeof(struct sbp2_query_logins_response), |
| &scsi_id->query_logins_response_dma); |
| if (!scsi_id->query_logins_response) |
| goto alloc_fail; |
| SBP2_DMA_ALLOC("consistent DMA region for query logins response"); |
| |
| /* Reconnect ORB DMA */ |
| scsi_id->reconnect_orb = |
| pci_alloc_consistent(hi->host->pdev, |
| sizeof(struct sbp2_reconnect_orb), |
| &scsi_id->reconnect_orb_dma); |
| if (!scsi_id->reconnect_orb) |
| goto alloc_fail; |
| SBP2_DMA_ALLOC("consistent DMA region for reconnect ORB"); |
| |
| /* Logout ORB DMA */ |
| scsi_id->logout_orb = |
| pci_alloc_consistent(hi->host->pdev, |
| sizeof(struct sbp2_logout_orb), |
| &scsi_id->logout_orb_dma); |
| if (!scsi_id->logout_orb) |
| goto alloc_fail; |
| SBP2_DMA_ALLOC("consistent DMA region for logout ORB"); |
| |
| /* Login ORB DMA */ |
| scsi_id->login_orb = |
| pci_alloc_consistent(hi->host->pdev, |
| sizeof(struct sbp2_login_orb), |
| &scsi_id->login_orb_dma); |
| if (!scsi_id->login_orb) { |
| alloc_fail: |
| if (scsi_id->query_logins_response) { |
| pci_free_consistent(hi->host->pdev, |
| sizeof(struct sbp2_query_logins_response), |
| scsi_id->query_logins_response, |
| scsi_id->query_logins_response_dma); |
| SBP2_DMA_FREE("query logins response DMA"); |
| } |
| |
| if (scsi_id->query_logins_orb) { |
| pci_free_consistent(hi->host->pdev, |
| sizeof(struct sbp2_query_logins_orb), |
| scsi_id->query_logins_orb, |
| scsi_id->query_logins_orb_dma); |
| SBP2_DMA_FREE("query logins ORB DMA"); |
| } |
| |
| if (scsi_id->logout_orb) { |
| pci_free_consistent(hi->host->pdev, |
| sizeof(struct sbp2_logout_orb), |
| scsi_id->logout_orb, |
| scsi_id->logout_orb_dma); |
| SBP2_DMA_FREE("logout ORB DMA"); |
| } |
| |
| if (scsi_id->reconnect_orb) { |
| pci_free_consistent(hi->host->pdev, |
| sizeof(struct sbp2_reconnect_orb), |
| scsi_id->reconnect_orb, |
| scsi_id->reconnect_orb_dma); |
| SBP2_DMA_FREE("reconnect ORB DMA"); |
| } |
| |
| if (scsi_id->login_response) { |
| pci_free_consistent(hi->host->pdev, |
| sizeof(struct sbp2_login_response), |
| scsi_id->login_response, |
| scsi_id->login_response_dma); |
| SBP2_DMA_FREE("login FIFO DMA"); |
| } |
| |
| list_del(&scsi_id->scsi_list); |
| |
| kfree(scsi_id); |
| |
| SBP2_ERR("Could not allocate memory for scsi_id"); |
| |
| return -ENOMEM; |
| } |
| SBP2_DMA_ALLOC("consistent DMA region for login ORB"); |
| |
| SBP2_DEBUG("New SBP-2 device inserted, SCSI ID = %x", scsi_id->ud->id); |
| |
| /* |
| * Create our command orb pool |
| */ |
| if (sbp2util_create_command_orb_pool(scsi_id)) { |
| SBP2_ERR("sbp2util_create_command_orb_pool failed!"); |
| sbp2_remove_device(scsi_id); |
| return -ENOMEM; |
| } |
| |
| /* Schedule a timeout here. The reason is that we may be so close |
| * to a bus reset, that the device is not available for logins. |
| * This can happen when the bus reset is caused by the host |
| * connected to the sbp2 device being removed. That host would |
| * have a certain amount of time to relogin before the sbp2 device |
| * allows someone else to login instead. One second makes sense. */ |
| msleep_interruptible(1000); |
| if (signal_pending(current)) { |
| SBP2_WARN("aborting sbp2_start_device due to event"); |
| sbp2_remove_device(scsi_id); |
| return -EINTR; |
| } |
| |
| /* |
| * Login to the sbp-2 device |
| */ |
| if (sbp2_login_device(scsi_id)) { |
| /* Login failed, just remove the device. */ |
| sbp2_remove_device(scsi_id); |
| return -EBUSY; |
| } |
| |
| /* |
| * Set max retries to something large on the device |
| */ |
| sbp2_set_busy_timeout(scsi_id); |
| |
| /* |
| * Do a SBP-2 fetch agent reset |
| */ |
| sbp2_agent_reset(scsi_id, 1); |
| |
| /* |
| * Get the max speed and packet size that we can use |
| */ |
| sbp2_max_speed_and_size(scsi_id); |
| |
| /* Add this device to the scsi layer now */ |
| error = scsi_add_device(scsi_id->scsi_host, 0, scsi_id->ud->id, 0); |
| if (error) { |
| SBP2_ERR("scsi_add_device failed"); |
| sbp2_logout_device(scsi_id); |
| sbp2_remove_device(scsi_id); |
| return error; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * This function removes an sbp2 device from the sbp2scsi_host_info struct. |
| */ |
| static void sbp2_remove_device(struct scsi_id_instance_data *scsi_id) |
| { |
| struct sbp2scsi_host_info *hi; |
| |
| SBP2_DEBUG("sbp2_remove_device"); |
| |
| if (!scsi_id) |
| return; |
| |
| hi = scsi_id->hi; |
| |
| /* This will remove our scsi device aswell */ |
| if (scsi_id->scsi_host) { |
| scsi_remove_host(scsi_id->scsi_host); |
| scsi_host_put(scsi_id->scsi_host); |
| } |
| |
| sbp2util_remove_command_orb_pool(scsi_id); |
| |
| list_del(&scsi_id->scsi_list); |
| |
| if (scsi_id->login_response) { |
| pci_free_consistent(hi->host->pdev, |
| sizeof(struct sbp2_login_response), |
| scsi_id->login_response, |
| scsi_id->login_response_dma); |
| SBP2_DMA_FREE("single login FIFO"); |
| } |
| |
| if (scsi_id->login_orb) { |
| pci_free_consistent(hi->host->pdev, |
| sizeof(struct sbp2_login_orb), |
| scsi_id->login_orb, |
| scsi_id->login_orb_dma); |
| SBP2_DMA_FREE("single login ORB"); |
| } |
| |
| if (scsi_id->reconnect_orb) { |
| pci_free_consistent(hi->host->pdev, |
| sizeof(struct sbp2_reconnect_orb), |
| scsi_id->reconnect_orb, |
| scsi_id->reconnect_orb_dma); |
| SBP2_DMA_FREE("single reconnect orb"); |
| } |
| |
| if (scsi_id->logout_orb) { |
| pci_free_consistent(hi->host->pdev, |
| sizeof(struct sbp2_logout_orb), |
| scsi_id->logout_orb, |
| scsi_id->logout_orb_dma); |
| SBP2_DMA_FREE("single logout orb"); |
| } |
| |
| if (scsi_id->query_logins_orb) { |
| pci_free_consistent(hi->host->pdev, |
| sizeof(struct sbp2_query_logins_orb), |
| scsi_id->query_logins_orb, |
| scsi_id->query_logins_orb_dma); |
| SBP2_DMA_FREE("single query logins orb"); |
| } |
| |
| if (scsi_id->query_logins_response) { |
| pci_free_consistent(hi->host->pdev, |
| sizeof(struct sbp2_query_logins_response), |
| scsi_id->query_logins_response, |
| scsi_id->query_logins_response_dma); |
| SBP2_DMA_FREE("single query logins data"); |
| } |
| |
| scsi_id->ud->device.driver_data = NULL; |
| |
| SBP2_DEBUG("SBP-2 device removed, SCSI ID = %d", scsi_id->ud->id); |
| |
| kfree(scsi_id); |
| } |
| |
| #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA |
| /* |
| * This function deals with physical dma write requests (for adapters that do not support |
| * physical dma in hardware). Mostly just here for debugging... |
| */ |
| static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid, |
| int destid, quadlet_t *data, u64 addr, |
| size_t length, u16 flags) |
| { |
| |
| /* |
| * Manually put the data in the right place. |
| */ |
| memcpy(bus_to_virt((u32) addr), data, length); |
| sbp2util_packet_dump(data, length, "sbp2 phys dma write by device", |
| (u32) addr); |
| return RCODE_COMPLETE; |
| } |
| |
| /* |
| * This function deals with physical dma read requests (for adapters that do not support |
| * physical dma in hardware). Mostly just here for debugging... |
| */ |
| static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid, |
| quadlet_t *data, u64 addr, size_t length, |
| u16 flags) |
| { |
| |
| /* |
| * Grab data from memory and send a read response. |
| */ |
| memcpy(data, bus_to_virt((u32) addr), length); |
| sbp2util_packet_dump(data, length, "sbp2 phys dma read by device", |
| (u32) addr); |
| return RCODE_COMPLETE; |
| } |
| #endif |
| |
| /************************************** |
| * SBP-2 protocol related section |
| **************************************/ |
| |
| /* |
| * This function queries the device for the maximum concurrent logins it |
| * supports. |
| */ |
| static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id) |
| { |
| struct sbp2scsi_host_info *hi = scsi_id->hi; |
| quadlet_t data[2]; |
| int max_logins; |
| int active_logins; |
| |
| SBP2_DEBUG("sbp2_query_logins"); |
| |
| scsi_id->query_logins_orb->reserved1 = 0x0; |
| scsi_id->query_logins_orb->reserved2 = 0x0; |
| |
| scsi_id->query_logins_orb->query_response_lo = scsi_id->query_logins_response_dma; |
| scsi_id->query_logins_orb->query_response_hi = ORB_SET_NODE_ID(hi->host->node_id); |
| SBP2_DEBUG("sbp2_query_logins: query_response_hi/lo initialized"); |
| |
| scsi_id->query_logins_orb->lun_misc = ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST); |
| scsi_id->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1); |
| scsi_id->query_logins_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_lun); |
| SBP2_DEBUG("sbp2_query_logins: lun_misc initialized"); |
| |
| scsi_id->query_logins_orb->reserved_resp_length = |
| ORB_SET_QUERY_LOGINS_RESP_LENGTH(sizeof(struct sbp2_query_logins_response)); |
| SBP2_DEBUG("sbp2_query_logins: reserved_resp_length initialized"); |
| |
| scsi_id->query_logins_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO + |
| SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id); |
| scsi_id->query_logins_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) | |
| SBP2_STATUS_FIFO_ADDRESS_HI); |
| SBP2_DEBUG("sbp2_query_logins: status FIFO initialized"); |
| |
| sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb)); |
| |
| SBP2_DEBUG("sbp2_query_logins: orb byte-swapped"); |
| |
| sbp2util_packet_dump(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb), |
| "sbp2 query logins orb", scsi_id->query_logins_orb_dma); |
| |
| memset(scsi_id->query_logins_response, 0, sizeof(struct sbp2_query_logins_response)); |
| memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); |
| |
| SBP2_DEBUG("sbp2_query_logins: query_logins_response/status FIFO memset"); |
| |
| data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
| data[1] = scsi_id->query_logins_orb_dma; |
| sbp2util_cpu_to_be32_buffer(data, 8); |
| |
| atomic_set(&scsi_id->sbp2_login_complete, 0); |
| |
| SBP2_DEBUG("sbp2_query_logins: prepared to write"); |
| hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8); |
| SBP2_DEBUG("sbp2_query_logins: written"); |
| |
| if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 2*HZ)) { |
| SBP2_INFO("Error querying logins to SBP-2 device - timed out"); |
| return -EIO; |
| } |
| |
| if (scsi_id->status_block.ORB_offset_lo != scsi_id->query_logins_orb_dma) { |
| SBP2_INFO("Error querying logins to SBP-2 device - timed out"); |
| return -EIO; |
| } |
| |
| if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) || |
| STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) || |
| STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) { |
| |
| SBP2_INFO("Error querying logins to SBP-2 device - timed out"); |
| return -EIO; |
| } |
| |
| sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_response, sizeof(struct sbp2_query_logins_response)); |
| |
| SBP2_DEBUG("length_max_logins = %x", |
| (unsigned int)scsi_id->query_logins_response->length_max_logins); |
| |
| SBP2_DEBUG("Query logins to SBP-2 device successful"); |
| |
| max_logins = RESPONSE_GET_MAX_LOGINS(scsi_id->query_logins_response->length_max_logins); |
| SBP2_DEBUG("Maximum concurrent logins supported: %d", max_logins); |
| |
| active_logins = RESPONSE_GET_ACTIVE_LOGINS(scsi_id->query_logins_response->length_max_logins); |
| SBP2_DEBUG("Number of active logins: %d", active_logins); |
| |
| if (active_logins >= max_logins) { |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * This function is called in order to login to a particular SBP-2 device, |
| * after a bus reset. |
| */ |
| static int sbp2_login_device(struct scsi_id_instance_data *scsi_id) |
| { |
| struct sbp2scsi_host_info *hi = scsi_id->hi; |
| quadlet_t data[2]; |
| |
| SBP2_DEBUG("sbp2_login_device"); |
| |
| if (!scsi_id->login_orb) { |
| SBP2_DEBUG("sbp2_login_device: login_orb not alloc'd!"); |
| return -EIO; |
| } |
| |
| if (!exclusive_login) { |
| if (sbp2_query_logins(scsi_id)) { |
| SBP2_INFO("Device does not support any more concurrent logins"); |
| return -EIO; |
| } |
| } |
| |
| /* Set-up login ORB, assume no password */ |
| scsi_id->login_orb->password_hi = 0; |
| scsi_id->login_orb->password_lo = 0; |
| SBP2_DEBUG("sbp2_login_device: password_hi/lo initialized"); |
| |
| scsi_id->login_orb->login_response_lo = scsi_id->login_response_dma; |
| scsi_id->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id); |
| SBP2_DEBUG("sbp2_login_device: login_response_hi/lo initialized"); |
| |
| scsi_id->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST); |
| scsi_id->login_orb->lun_misc |= ORB_SET_RECONNECT(0); /* One second reconnect time */ |
| scsi_id->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(exclusive_login); /* Exclusive access to device */ |
| scsi_id->login_orb->lun_misc |= ORB_SET_NOTIFY(1); /* Notify us of login complete */ |
| scsi_id->login_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_lun); |
| SBP2_DEBUG("sbp2_login_device: lun_misc initialized"); |
| |
| scsi_id->login_orb->passwd_resp_lengths = |
| ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response)); |
| SBP2_DEBUG("sbp2_login_device: passwd_resp_lengths initialized"); |
| |
| scsi_id->login_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO + |
| SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id); |
| scsi_id->login_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) | |
| SBP2_STATUS_FIFO_ADDRESS_HI); |
| SBP2_DEBUG("sbp2_login_device: status FIFO initialized"); |
| |
| /* |
| * Byte swap ORB if necessary |
| */ |
| sbp2util_cpu_to_be32_buffer(scsi_id->login_orb, sizeof(struct sbp2_login_orb)); |
| |
| SBP2_DEBUG("sbp2_login_device: orb byte-swapped"); |
| |
| sbp2util_packet_dump(scsi_id->login_orb, sizeof(struct sbp2_login_orb), |
| "sbp2 login orb", scsi_id->login_orb_dma); |
| |
| /* |
| * Initialize login response and status fifo |
| */ |
| memset(scsi_id->login_response, 0, sizeof(struct sbp2_login_response)); |
| memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); |
| |
| SBP2_DEBUG("sbp2_login_device: login_response/status FIFO memset"); |
| |
| /* |
| * Ok, let's write to the target's management agent register |
| */ |
| data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
| data[1] = scsi_id->login_orb_dma; |
| sbp2util_cpu_to_be32_buffer(data, 8); |
| |
| atomic_set(&scsi_id->sbp2_login_complete, 0); |
| |
| SBP2_DEBUG("sbp2_login_device: prepared to write to %08x", |
| (unsigned int)scsi_id->sbp2_management_agent_addr); |
| hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8); |
| SBP2_DEBUG("sbp2_login_device: written"); |
| |
| /* |
| * Wait for login status (up to 20 seconds)... |
| */ |
| if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 20*HZ)) { |
| SBP2_ERR("Error logging into SBP-2 device - login timed-out"); |
| return -EIO; |
| } |
| |
| /* |
| * Sanity. Make sure status returned matches login orb. |
| */ |
| if (scsi_id->status_block.ORB_offset_lo != scsi_id->login_orb_dma) { |
| SBP2_ERR("Error logging into SBP-2 device - login timed-out"); |
| return -EIO; |
| } |
| |
| /* |
| * Check status |
| */ |
| if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) || |
| STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) || |
| STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) { |
| |
| SBP2_ERR("Error logging into SBP-2 device - login failed"); |
| return -EIO; |
| } |
| |
| /* |
| * Byte swap the login response, for use when reconnecting or |
| * logging out. |
| */ |
| sbp2util_cpu_to_be32_buffer(scsi_id->login_response, sizeof(struct sbp2_login_response)); |
| |
| /* |
| * Grab our command block agent address from the login response. |
| */ |
| SBP2_DEBUG("command_block_agent_hi = %x", |
| (unsigned int)scsi_id->login_response->command_block_agent_hi); |
| SBP2_DEBUG("command_block_agent_lo = %x", |
| (unsigned int)scsi_id->login_response->command_block_agent_lo); |
| |
| scsi_id->sbp2_command_block_agent_addr = |
| ((u64)scsi_id->login_response->command_block_agent_hi) << 32; |
| scsi_id->sbp2_command_block_agent_addr |= ((u64)scsi_id->login_response->command_block_agent_lo); |
| scsi_id->sbp2_command_block_agent_addr &= 0x0000ffffffffffffULL; |
| |
| SBP2_INFO("Logged into SBP-2 device"); |
| |
| return 0; |
| |
| } |
| |
| /* |
| * This function is called in order to logout from a particular SBP-2 |
| * device, usually called during driver unload. |
| */ |
| static int sbp2_logout_device(struct scsi_id_instance_data *scsi_id) |
| { |
| struct sbp2scsi_host_info *hi = scsi_id->hi; |
| quadlet_t data[2]; |
| int error; |
| |
| SBP2_DEBUG("sbp2_logout_device"); |
| |
| /* |
| * Set-up logout ORB |
| */ |
| scsi_id->logout_orb->reserved1 = 0x0; |
| scsi_id->logout_orb->reserved2 = 0x0; |
| scsi_id->logout_orb->reserved3 = 0x0; |
| scsi_id->logout_orb->reserved4 = 0x0; |
| |
| scsi_id->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST); |
| scsi_id->logout_orb->login_ID_misc |= ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID); |
| |
| /* Notify us when complete */ |
| scsi_id->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1); |
| |
| scsi_id->logout_orb->reserved5 = 0x0; |
| scsi_id->logout_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO + |
| SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id); |
| scsi_id->logout_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) | |
| SBP2_STATUS_FIFO_ADDRESS_HI); |
| |
| /* |
| * Byte swap ORB if necessary |
| */ |
| sbp2util_cpu_to_be32_buffer(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb)); |
| |
| sbp2util_packet_dump(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb), |
| "sbp2 logout orb", scsi_id->logout_orb_dma); |
| |
| /* |
| * Ok, let's write to the target's management agent register |
| */ |
| data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
| data[1] = scsi_id->logout_orb_dma; |
| sbp2util_cpu_to_be32_buffer(data, 8); |
| |
| atomic_set(&scsi_id->sbp2_login_complete, 0); |
| |
| error = hpsb_node_write(scsi_id->ne, |
| scsi_id->sbp2_management_agent_addr, data, 8); |
| if (error) |
| return error; |
| |
| /* Wait for device to logout...1 second. */ |
| if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ)) |
| return -EIO; |
| |
| SBP2_INFO("Logged out of SBP-2 device"); |
| |
| return 0; |
| |
| } |
| |
| /* |
| * This function is called in order to reconnect to a particular SBP-2 |
| * device, after a bus reset. |
| */ |
| static int sbp2_reconnect_device(struct scsi_id_instance_data *scsi_id) |
| { |
| struct sbp2scsi_host_info *hi = scsi_id->hi; |
| quadlet_t data[2]; |
| int error; |
| |
| SBP2_DEBUG("sbp2_reconnect_device"); |
| |
| /* |
| * Set-up reconnect ORB |
| */ |
| scsi_id->reconnect_orb->reserved1 = 0x0; |
| scsi_id->reconnect_orb->reserved2 = 0x0; |
| scsi_id->reconnect_orb->reserved3 = 0x0; |
| scsi_id->reconnect_orb->reserved4 = 0x0; |
| |
| scsi_id->reconnect_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST); |
| scsi_id->reconnect_orb->login_ID_misc |= |
| ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID); |
| |
| /* Notify us when complete */ |
| scsi_id->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1); |
| |
| scsi_id->reconnect_orb->reserved5 = 0x0; |
| scsi_id->reconnect_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO + |
| SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id); |
| scsi_id->reconnect_orb->status_FIFO_hi = |
| (ORB_SET_NODE_ID(hi->host->node_id) | SBP2_STATUS_FIFO_ADDRESS_HI); |
| |
| /* |
| * Byte swap ORB if necessary |
| */ |
| sbp2util_cpu_to_be32_buffer(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb)); |
| |
| sbp2util_packet_dump(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb), |
| "sbp2 reconnect orb", scsi_id->reconnect_orb_dma); |
| |
| /* |
| * Initialize status fifo |
| */ |
| memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); |
| |
| /* |
| * Ok, let's write to the target's management agent register |
| */ |
| data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
| data[1] = scsi_id->reconnect_orb_dma; |
| sbp2util_cpu_to_be32_buffer(data, 8); |
| |
| atomic_set(&scsi_id->sbp2_login_complete, 0); |
| |
| error = hpsb_node_write(scsi_id->ne, |
| scsi_id->sbp2_management_agent_addr, data, 8); |
| if (error) |
| return error; |
| |
| /* |
| * Wait for reconnect status (up to 1 second)... |
| */ |
| if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ)) { |
| SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out"); |
| return -EIO; |
| } |
| |
| /* |
| * Sanity. Make sure status returned matches reconnect orb. |
| */ |
| if (scsi_id->status_block.ORB_offset_lo != scsi_id->reconnect_orb_dma) { |
| SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out"); |
| return -EIO; |
| } |
| |
| /* |
| * Check status |
| */ |
| if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) || |
| STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) || |
| STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) { |
| |
| SBP2_ERR("Error reconnecting to SBP-2 device - reconnect failed"); |
| return -EIO; |
| } |
| |
| HPSB_DEBUG("Reconnected to SBP-2 device"); |
| |
| return 0; |
| |
| } |
| |
| /* |
| * This function is called in order to set the busy timeout (number of |
| * retries to attempt) on the sbp2 device. |
| */ |
| static int sbp2_set_busy_timeout(struct scsi_id_instance_data *scsi_id) |
| { |
| quadlet_t data; |
| |
| SBP2_DEBUG("sbp2_set_busy_timeout"); |
| |
| /* |
| * Ok, let's write to the target's busy timeout register |
| */ |
| data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE); |
| |
| if (hpsb_node_write(scsi_id->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4)) { |
| SBP2_ERR("sbp2_set_busy_timeout error"); |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * This function is called to parse sbp2 device's config rom unit |
| * directory. Used to determine things like sbp2 management agent offset, |
| * and command set used (SCSI or RBC). |
| */ |
| static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id, |
| struct unit_directory *ud) |
| { |
| struct csr1212_keyval *kv; |
| struct csr1212_dentry *dentry; |
| u64 management_agent_addr; |
| u32 command_set_spec_id, command_set, unit_characteristics, |
| firmware_revision, workarounds; |
| int i; |
| |
| SBP2_DEBUG("sbp2_parse_unit_directory"); |
| |
| management_agent_addr = 0x0; |
| command_set_spec_id = 0x0; |
| command_set = 0x0; |
| unit_characteristics = 0x0; |
| firmware_revision = 0x0; |
| |
| /* Handle different fields in the unit directory, based on keys */ |
| csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) { |
| switch (kv->key.id) { |
| case CSR1212_KV_ID_DEPENDENT_INFO: |
| if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET) { |
| /* Save off the management agent address */ |
| management_agent_addr = |
| CSR1212_REGISTER_SPACE_BASE + |
| (kv->value.csr_offset << 2); |
| |
| SBP2_DEBUG("sbp2_management_agent_addr = %x", |
| (unsigned int)management_agent_addr); |
| } else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { |
| scsi_id->sbp2_lun = |
| ORB_SET_LUN(kv->value.immediate); |
| } |
| break; |
| |
| case SBP2_COMMAND_SET_SPEC_ID_KEY: |
| /* Command spec organization */ |
| command_set_spec_id = kv->value.immediate; |
| SBP2_DEBUG("sbp2_command_set_spec_id = %x", |
| (unsigned int)command_set_spec_id); |
| break; |
| |
| case SBP2_COMMAND_SET_KEY: |
| /* Command set used by sbp2 device */ |
| command_set = kv->value.immediate; |
| SBP2_DEBUG("sbp2_command_set = %x", |
| (unsigned int)command_set); |
| break; |
| |
| case SBP2_UNIT_CHARACTERISTICS_KEY: |
| /* |
| * Unit characterisitcs (orb related stuff |
| * that I'm not yet paying attention to) |
| */ |
| unit_characteristics = kv->value.immediate; |
| SBP2_DEBUG("sbp2_unit_characteristics = %x", |
| (unsigned int)unit_characteristics); |
| break; |
| |
| case SBP2_FIRMWARE_REVISION_KEY: |
| /* Firmware revision */ |
| firmware_revision = kv->value.immediate; |
| if (force_inquiry_hack) |
| SBP2_INFO("sbp2_firmware_revision = %x", |
| (unsigned int)firmware_revision); |
| else |
| SBP2_DEBUG("sbp2_firmware_revision = %x", |
| (unsigned int)firmware_revision); |
| break; |
| |
| default: |
| break; |
| } |
| } |
| |
| /* This is the start of our broken device checking. We try to hack |
| * around oddities and known defects. */ |
| workarounds = 0x0; |
| |
| /* If the vendor id is 0xa0b8 (Symbios vendor id), then we have a |
| * bridge with 128KB max transfer size limitation. For sanity, we |
| * only voice this when the current max_sectors setting |
| * exceeds the 128k limit. By default, that is not the case. |
| * |
| * It would be really nice if we could detect this before the scsi |
| * host gets initialized. That way we can down-force the |
| * max_sectors to account for it. That is not currently |
| * possible. */ |
| if ((firmware_revision & 0xffff00) == |
| SBP2_128KB_BROKEN_FIRMWARE && |
| (max_sectors * 512) > (128*1024)) { |
| SBP2_WARN("Node " NODE_BUS_FMT ": Bridge only supports 128KB max transfer size.", |
| NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid)); |
| SBP2_WARN("WARNING: Current max_sectors setting is larger than 128KB (%d sectors)!", |
| max_sectors); |
| workarounds |= SBP2_BREAKAGE_128K_MAX_TRANSFER; |
| } |
| |
| /* Check for a blacklisted set of devices that require us to force |
| * a 36 byte host inquiry. This can be overriden as a module param |
| * (to force all hosts). */ |
| for (i = 0; i < NUM_BROKEN_INQUIRY_DEVS; i++) { |
| if ((firmware_revision & 0xffff00) == |
| sbp2_broken_inquiry_list[i]) { |
| SBP2_WARN("Node " NODE_BUS_FMT ": Using 36byte inquiry workaround", |
| NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid)); |
| workarounds |= SBP2_BREAKAGE_INQUIRY_HACK; |
| break; /* No need to continue. */ |
| } |
| } |
| |
| /* If this is a logical unit directory entry, process the parent |
| * to get the values. */ |
| if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) { |
| struct unit_directory *parent_ud = |
| container_of(ud->device.parent, struct unit_directory, device); |
| sbp2_parse_unit_directory(scsi_id, parent_ud); |
| } else { |
| scsi_id->sbp2_management_agent_addr = management_agent_addr; |
| scsi_id->sbp2_command_set_spec_id = command_set_spec_id; |
| scsi_id->sbp2_command_set = command_set; |
| scsi_id->sbp2_unit_characteristics = unit_characteristics; |
| scsi_id->sbp2_firmware_revision = firmware_revision; |
| scsi_id->workarounds = workarounds; |
| if (ud->flags & UNIT_DIRECTORY_HAS_LUN) |
| scsi_id->sbp2_lun = ORB_SET_LUN(ud->lun); |
| } |
| } |
| |
| /* |
| * This function is called in order to determine the max speed and packet |
| * size we can use in our ORBs. Note, that we (the driver and host) only |
| * initiate the transaction. The SBP-2 device actually transfers the data |
| * (by reading from the DMA area we tell it). This means that the SBP-2 |
| * device decides the actual maximum data it can transfer. We just tell it |
| * the speed that it needs to use, and the max_rec the host supports, and |
| * it takes care of the rest. |
| */ |
| static int sbp2_max_speed_and_size(struct scsi_id_instance_data *scsi_id) |
| { |
| struct sbp2scsi_host_info *hi = scsi_id->hi; |
| |
| SBP2_DEBUG("sbp2_max_speed_and_size"); |
| |
| /* Initial setting comes from the hosts speed map */ |
| scsi_id->speed_code = |
| hi->host->speed_map[NODEID_TO_NODE(hi->host->node_id) * 64 + |
| NODEID_TO_NODE(scsi_id->ne->nodeid)]; |
| |
| /* Bump down our speed if the user requested it */ |
| if (scsi_id->speed_code > max_speed) { |
| scsi_id->speed_code = max_speed; |
| SBP2_ERR("Forcing SBP-2 max speed down to %s", |
| hpsb_speedto_str[scsi_id->speed_code]); |
| } |
| |
| /* Payload size is the lesser of what our speed supports and what |
| * our host supports. */ |
| scsi_id->max_payload_size = |
| min(sbp2_speedto_max_payload[scsi_id->speed_code], |
| (u8) (hi->host->csr.max_rec - 1)); |
| |
| HPSB_DEBUG("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]", |
| NODE_BUS_ARGS(hi->host, scsi_id->ne->nodeid), |
| hpsb_speedto_str[scsi_id->speed_code], |
| 1 << ((u32) scsi_id->max_payload_size + 2)); |
| |
| return 0; |
| } |
| |
| /* |
| * This function is called in order to perform a SBP-2 agent reset. |
| */ |
| static int sbp2_agent_reset(struct scsi_id_instance_data *scsi_id, int wait) |
| { |
| quadlet_t data; |
| u64 addr; |
| int retval; |
| |
| SBP2_DEBUG("sbp2_agent_reset"); |
| |
| /* |
| * Ok, let's write to the target's management agent register |
| */ |
| data = ntohl(SBP2_AGENT_RESET_DATA); |
| addr = scsi_id->sbp2_command_block_agent_addr + SBP2_AGENT_RESET_OFFSET; |
| |
| if (wait) |
| retval = hpsb_node_write(scsi_id->ne, addr, &data, 4); |
| else |
| retval = sbp2util_node_write_no_wait(scsi_id->ne, addr, &data, 4); |
| |
| if (retval < 0) { |
| SBP2_ERR("hpsb_node_write failed.\n"); |
| return -EIO; |
| } |
| |
| /* |
| * Need to make sure orb pointer is written on next command |
| */ |
| scsi_id->last_orb = NULL; |
| |
| return 0; |
| } |
| |
| /* |
| * This function is called to create the actual command orb and s/g list |
| * out of the scsi command itself. |
| */ |
| static int sbp2_create_command_orb(struct scsi_id_instance_data *scsi_id, |
| struct sbp2_command_info *command, |
| unchar *scsi_cmd, |
| unsigned int scsi_use_sg, |
| unsigned int scsi_request_bufflen, |
| void *scsi_request_buffer, |
| enum dma_data_direction dma_dir) |
| { |
| struct sbp2scsi_host_info *hi = scsi_id->hi; |
| struct scatterlist *sgpnt = (struct scatterlist *)scsi_request_buffer; |
| struct sbp2_command_orb *command_orb = &command->command_orb; |
| struct sbp2_unrestricted_page_table *scatter_gather_element = |
| &command->scatter_gather_element[0]; |
| u32 sg_count, sg_len, orb_direction; |
| dma_addr_t sg_addr; |
| int i; |
| |
| /* |
| * Set-up our command ORB.. |
| * |
| * NOTE: We're doing unrestricted page tables (s/g), as this is |
| * best performance (at least with the devices I have). This means |
| * that data_size becomes the number of s/g elements, and |
| * page_size should be zero (for unrestricted). |
| */ |
| command_orb->next_ORB_hi = ORB_SET_NULL_PTR(1); |
| command_orb->next_ORB_lo = 0x0; |
| command_orb->misc = ORB_SET_MAX_PAYLOAD(scsi_id->max_payload_size); |
| command_orb->misc |= ORB_SET_SPEED(scsi_id->speed_code); |
| command_orb->misc |= ORB_SET_NOTIFY(1); /* Notify us when complete */ |
| |
| if (dma_dir == DMA_NONE) |
| orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; |
| else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen) |
| orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA; |
| else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen) |
| orb_direction = ORB_DIRECTION_READ_FROM_MEDIA; |
| else { |
| SBP2_WARN("Falling back to DMA_NONE"); |
| orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; |
| } |
| |
| /* |
| * Set-up our pagetable stuff... unfortunately, this has become |
| * messier than I'd like. Need to clean this up a bit. ;-) |
| */ |
| if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) { |
| |
| SBP2_DEBUG("No data transfer"); |
| |
| /* |
| * Handle no data transfer |
| */ |
| command_orb->data_descriptor_hi = 0x0; |
| command_orb->data_descriptor_lo = 0x0; |
| command_orb->misc |= ORB_SET_DIRECTION(1); |
| |
| } else if (scsi_use_sg) { |
| |
| SBP2_DEBUG("Use scatter/gather"); |
| |
| /* |
| * Special case if only one element (and less than 64KB in size) |
| */ |
| if ((scsi_use_sg == 1) && (sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) { |
| |
| SBP2_DEBUG("Only one s/g element"); |
| command->dma_dir = dma_dir; |
| command->dma_size = sgpnt[0].length; |
| command->dma_type = CMD_DMA_PAGE; |
| command->cmd_dma = pci_map_page(hi->host->pdev, |
| sgpnt[0].page, |
| sgpnt[0].offset, |
| command->dma_size, |
| command->dma_dir); |
| SBP2_DMA_ALLOC("single page scatter element"); |
| |
| command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); |
| command_orb->data_descriptor_lo = command->cmd_dma; |
| command_orb->misc |= ORB_SET_DATA_SIZE(command->dma_size); |
| command_orb->misc |= ORB_SET_DIRECTION(orb_direction); |
| |
| } else { |
| int count = pci_map_sg(hi->host->pdev, sgpnt, scsi_use_sg, dma_dir); |
| SBP2_DMA_ALLOC("scatter list"); |
| |
| command->dma_size = scsi_use_sg; |
| command->dma_dir = dma_dir; |
| command->sge_buffer = sgpnt; |
| |
| /* use page tables (s/g) */ |
| command_orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); |
| command_orb->misc |= ORB_SET_DIRECTION(orb_direction); |
| command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); |
| command_orb->data_descriptor_lo = command->sge_dma; |
| |
| /* |
| * Loop through and fill out our sbp-2 page tables |
| * (and split up anything too large) |
| */ |
| for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) { |
| sg_len = sg_dma_len(sgpnt); |
| sg_addr = sg_dma_address(sgpnt); |
| while (sg_len) { |
| scatter_gather_element[sg_count].segment_base_lo = sg_addr; |
| if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { |
| scatter_gather_element[sg_count].length_segment_base_hi = |
| PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); |
| sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; |
| sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; |
| } else { |
| scatter_gather_element[sg_count].length_segment_base_hi = |
| PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); |
| sg_len = 0; |
| } |
| sg_count++; |
| } |
| } |
| |
| /* Number of page table (s/g) elements */ |
| command_orb->misc |= ORB_SET_DATA_SIZE(sg_count); |
| |
| sbp2util_packet_dump(scatter_gather_element, |
| (sizeof(struct sbp2_unrestricted_page_table)) * sg_count, |
| "sbp2 s/g list", command->sge_dma); |
| |
| /* |
| * Byte swap page tables if necessary |
| */ |
| sbp2util_cpu_to_be32_buffer(scatter_gather_element, |
| (sizeof(struct sbp2_unrestricted_page_table)) * |
| sg_count); |
| |
| } |
| |
| } else { |
| |
| SBP2_DEBUG("No scatter/gather"); |
| |
| command->dma_dir = dma_dir; |
| command->dma_size = scsi_request_bufflen; |
| command->dma_type = CMD_DMA_SINGLE; |
| command->cmd_dma = |
| pci_map_single(hi->host->pdev, scsi_request_buffer, |
| command->dma_size, command->dma_dir); |
| SBP2_DMA_ALLOC("single bulk"); |
| |
| /* |
| * Handle case where we get a command w/o s/g enabled (but |
| * check for transfers larger than 64K) |
| */ |
| if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) { |
| |
| command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); |
| command_orb->data_descriptor_lo = command->cmd_dma; |
| command_orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen); |
| command_orb->misc |= ORB_SET_DIRECTION(orb_direction); |
| |
| } else { |
| /* |
| * Need to turn this into page tables, since the |
| * buffer is too large. |
| */ |
| command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); |
| command_orb->data_descriptor_lo = command->sge_dma; |
| |
| /* Use page tables (s/g) */ |
| command_orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); |
| command_orb->misc |= ORB_SET_DIRECTION(orb_direction); |
| |
| /* |
| * fill out our sbp-2 page tables (and split up |
| * the large buffer) |
| */ |
| sg_count = 0; |
| sg_len = scsi_request_bufflen; |
| sg_addr = command->cmd_dma; |
| while (sg_len) { |
| scatter_gather_element[sg_count].segment_base_lo = sg_addr; |
| if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { |
| scatter_gather_element[sg_count].length_segment_base_hi = |
| PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); |
| sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; |
| sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; |
| } else { |
| scatter_gather_element[sg_count].length_segment_base_hi = |
| PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); |
| sg_len = 0; |
| } |
| sg_count++; |
| } |
| |
| /* Number of page table (s/g) elements */ |
| command_orb->misc |= ORB_SET_DATA_SIZE(sg_count); |
| |
| sbp2util_packet_dump(scatter_gather_element, |
| (sizeof(struct sbp2_unrestricted_page_table)) * sg_count, |
| "sbp2 s/g list", command->sge_dma); |
| |
| /* |
| * Byte swap page tables if necessary |
| */ |
| sbp2util_cpu_to_be32_buffer(scatter_gather_element, |
| (sizeof(struct sbp2_unrestricted_page_table)) * |
| sg_count); |
| |
| } |
| |
| } |
| |
| /* |
| * Byte swap command ORB if necessary |
| */ |
| sbp2util_cpu_to_be32_buffer(command_orb, sizeof(struct sbp2_command_orb)); |
| |
| /* |
| * Put our scsi command in the command ORB |
| */ |
| memset(command_orb->cdb, 0, 12); |
| memcpy(command_orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd)); |
| |
| return 0; |
| } |
| |
| /* |
| * This function is called in order to begin a regular SBP-2 command. |
| */ |
| static int sbp2_link_orb_command(struct scsi_id_instance_data *scsi_id, |
| struct sbp2_command_info *command) |
| { |
| struct sbp2scsi_host_info *hi = scsi_id->hi; |
| struct sbp2_command_orb *command_orb = &command->command_orb; |
| struct node_entry *ne = scsi_id->ne; |
| u64 addr; |
| |
| outstanding_orb_incr; |
| SBP2_ORB_DEBUG("sending command orb %p, total orbs = %x", |
| command_orb, global_outstanding_command_orbs); |
| |
| pci_dma_sync_single_for_device(hi->host->pdev, command->command_orb_dma, |
| sizeof(struct sbp2_command_orb), |
| PCI_DMA_BIDIRECTIONAL); |
| pci_dma_sync_single_for_device(hi->host->pdev, command->sge_dma, |
| sizeof(command->scatter_gather_element), |
| PCI_DMA_BIDIRECTIONAL); |
| /* |
| * Check to see if there are any previous orbs to use |
| */ |
| if (scsi_id->last_orb == NULL) { |
| quadlet_t data[2]; |
| |
| /* |
| * Ok, let's write to the target's management agent register |
| */ |
| addr = scsi_id->sbp2_command_block_agent_addr + SBP2_ORB_POINTER_OFFSET; |
| data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
| data[1] = command->command_orb_dma; |
| sbp2util_cpu_to_be32_buffer(data, 8); |
| |
| SBP2_ORB_DEBUG("write command agent, command orb %p", command_orb); |
| |
| if (sbp2util_node_write_no_wait(ne, addr, data, 8) < 0) { |
| SBP2_ERR("sbp2util_node_write_no_wait failed.\n"); |
| return -EIO; |
| } |
| |
| SBP2_ORB_DEBUG("write command agent complete"); |
| |
| scsi_id->last_orb = command_orb; |
| scsi_id->last_orb_dma = command->command_orb_dma; |
| |
| } else { |
| quadlet_t data; |
| |
| /* |
| * We have an orb already sent (maybe or maybe not |
| * processed) that we can append this orb to. So do so, |
| * and ring the doorbell. Have to be very careful |
| * modifying these next orb pointers, as they are accessed |
| * both by the sbp2 device and us. |
| */ |
| scsi_id->last_orb->next_ORB_lo = |
| cpu_to_be32(command->command_orb_dma); |
| /* Tells hardware that this pointer is valid */ |
| scsi_id->last_orb->next_ORB_hi = 0x0; |
| pci_dma_sync_single_for_device(hi->host->pdev, |
| scsi_id->last_orb_dma, |
| sizeof(struct sbp2_command_orb), |
| PCI_DMA_BIDIRECTIONAL); |
| |
| /* |
| * Ring the doorbell |
| */ |
| data = cpu_to_be32(command->command_orb_dma); |
| addr = scsi_id->sbp2_command_block_agent_addr + SBP2_DOORBELL_OFFSET; |
| |
| SBP2_ORB_DEBUG("ring doorbell, command orb %p", command_orb); |
| |
| if (sbp2util_node_write_no_wait(ne, addr, &data, 4) < 0) { |
| SBP2_ERR("sbp2util_node_write_no_wait failed"); |
| return -EIO; |
| } |
| |
| scsi_id->last_orb = command_orb; |
| scsi_id->last_orb_dma = command->command_orb_dma; |
| |
| } |
| return 0; |
| } |
| |
| /* |
| * This function is called in order to begin a regular SBP-2 command. |
| */ |
| static int sbp2_send_command(struct scsi_id_instance_data *scsi_id, |
| struct scsi_cmnd *SCpnt, |
| void (*done)(struct scsi_cmnd *)) |
| { |
| unchar *cmd = (unchar *) SCpnt->cmnd; |
| unsigned int request_bufflen = SCpnt->request_bufflen; |
| struct sbp2_command_info *command; |
| |
| SBP2_DEBUG("sbp2_send_command"); |
| #if (CONFIG_IEEE1394_SBP2_DEBUG >= 2) || defined(CONFIG_IEEE1394_SBP2_PACKET_DUMP) |
| printk("[scsi command]\n "); |
| scsi_print_command(SCpnt); |
| #endif |
| SBP2_DEBUG("SCSI transfer size = %x", request_bufflen); |
| SBP2_DEBUG("SCSI s/g elements = %x", (unsigned int)SCpnt->use_sg); |
| |
| /* |
| * Allocate a command orb and s/g structure |
| */ |
| command = sbp2util_allocate_command_orb(scsi_id, SCpnt, done); |
| if (!command) { |
| return -EIO; |
| } |
| |
| /* |
| * The scsi stack sends down a request_bufflen which does not match the |
| * length field in the scsi cdb. This causes some sbp2 devices to |
| * reject this inquiry command. Fix the request_bufflen. |
| */ |
| if (*cmd == INQUIRY) { |
| if (force_inquiry_hack || scsi_id->workarounds & SBP2_BREAKAGE_INQUIRY_HACK) |
| request_bufflen = cmd[4] = 0x24; |
| else |
| request_bufflen = cmd[4]; |
| } |
| |
| /* |
| * Now actually fill in the comamnd orb and sbp2 s/g list |
| */ |
| sbp2_create_command_orb(scsi_id, command, cmd, SCpnt->use_sg, |
| request_bufflen, SCpnt->request_buffer, |
| SCpnt->sc_data_direction); |
| |
| sbp2util_packet_dump(&command->command_orb, sizeof(struct sbp2_command_orb), |
| "sbp2 command orb", command->command_orb_dma); |
| |
| /* |
| * Initialize status fifo |
| */ |
| memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); |
| |
| /* |
| * Link up the orb, and ring the doorbell if needed |
| */ |
| sbp2_link_orb_command(scsi_id, command); |
| |
| return 0; |
| } |
| |
| /* |
| * Translates SBP-2 status into SCSI sense data for check conditions |
| */ |
| static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, unchar *sense_data) |
| { |
| SBP2_DEBUG("sbp2_status_to_sense_data"); |
| |
| /* |
| * Ok, it's pretty ugly... ;-) |
| */ |
| sense_data[0] = 0x70; |
| sense_data[1] = 0x0; |
| sense_data[2] = sbp2_status[9]; |
| sense_data[3] = sbp2_status[12]; |
| sense_data[4] = sbp2_status[13]; |
| sense_data[5] = sbp2_status[14]; |
| sense_data[6] = sbp2_status[15]; |
| sense_data[7] = 10; |
| sense_data[8] = sbp2_status[16]; |
| sense_data[9] = sbp2_status[17]; |
| sense_data[10] = sbp2_status[18]; |
| sense_data[11] = sbp2_status[19]; |
| sense_data[12] = sbp2_status[10]; |
| sense_data[13] = sbp2_status[11]; |
| sense_data[14] = sbp2_status[20]; |
| sense_data[15] = sbp2_status[21]; |
| |
| return sbp2_status[8] & 0x3f; /* return scsi status */ |
| } |
| |
| /* |
| * This function is called after a command is completed, in order to do any necessary SBP-2 |
| * response data translations for the SCSI stack |
| */ |
| static void sbp2_check_sbp2_response(struct scsi_id_instance_data *scsi_id, |
| struct scsi_cmnd *SCpnt) |
| { |
| u8 *scsi_buf = SCpnt->request_buffer; |
| |
| SBP2_DEBUG("sbp2_check_sbp2_response"); |
| |
| switch (SCpnt->cmnd[0]) { |
| |
| case INQUIRY: |
| /* |
| * Make sure data length is ok. Minimum length is 36 bytes |
| */ |
| if (scsi_buf[4] == 0) { |
| scsi_buf[4] = 36 - 5; |
| } |
| |
| /* |
| * Fix ansi revision and response data format |
| */ |
| scsi_buf[2] |= 2; |
| scsi_buf[3] = (scsi_buf[3] & 0xf0) | 2; |
| |
| break; |
| |
| default: |
| break; |
| } |
| return; |
| } |
| |
| /* |
| * This function deals with status writes from the SBP-2 device |
| */ |
| static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, int destid, |
| quadlet_t *data, u64 addr, size_t length, u16 fl) |
| { |
| struct sbp2scsi_host_info *hi; |
| struct scsi_id_instance_data *scsi_id = NULL, *scsi_id_tmp; |
| u32 id; |
| struct scsi_cmnd *SCpnt = NULL; |
| u32 scsi_status = SBP2_SCSI_STATUS_GOOD; |
| struct sbp2_command_info *command; |
| unsigned long flags; |
| |
| SBP2_DEBUG("sbp2_handle_status_write"); |
| |
| sbp2util_packet_dump(data, length, "sbp2 status write by device", (u32)addr); |
| |
| if (!host) { |
| SBP2_ERR("host is NULL - this is bad!"); |
| return RCODE_ADDRESS_ERROR; |
| } |
| |
| hi = hpsb_get_hostinfo(&sbp2_highlevel, host); |
| |
| if (!hi) { |
| SBP2_ERR("host info is NULL - this is bad!"); |
| return RCODE_ADDRESS_ERROR; |
| } |
| |
| /* |
| * Find our scsi_id structure by looking at the status fifo address written to by |
| * the sbp2 device. |
| */ |
| id = SBP2_STATUS_FIFO_OFFSET_TO_ENTRY((u32)(addr - SBP2_STATUS_FIFO_ADDRESS)); |
| list_for_each_entry(scsi_id_tmp, &hi->scsi_ids, scsi_list) { |
| if (scsi_id_tmp->ne->nodeid == nodeid && scsi_id_tmp->ud->id == id) { |
| scsi_id = scsi_id_tmp; |
| break; |
| } |
| } |
| |
| if (!scsi_id) { |
| SBP2_ERR("scsi_id is NULL - device is gone?"); |
| return RCODE_ADDRESS_ERROR; |
| } |
| |
| /* |
| * Put response into scsi_id status fifo... |
| */ |
| memcpy(&scsi_id->status_block, data, length); |
| |
| /* |
| * Byte swap first two quadlets (8 bytes) of status for processing |
| */ |
| sbp2util_be32_to_cpu_buffer(&scsi_id->status_block, 8); |
| |
| /* |
| * Handle command ORB status here if necessary. First, need to match status with command. |
| */ |
| command = sbp2util_find_command_for_orb(scsi_id, scsi_id->status_block.ORB_offset_lo); |
| if (command) { |
| |
| SBP2_DEBUG("Found status for command ORB"); |
| pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma, |
| sizeof(struct sbp2_command_orb), |
| PCI_DMA_BIDIRECTIONAL); |
| pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma, |
| sizeof(command->scatter_gather_element), |
| PCI_DMA_BIDIRECTIONAL); |
| |
| SBP2_ORB_DEBUG("matched command orb %p", &command->command_orb); |
| outstanding_orb_decr; |
| |
| /* |
| * Matched status with command, now grab scsi command pointers and check status |
| */ |
| SCpnt = command->Current_SCpnt; |
| sbp2util_mark_command_completed(scsi_id, command); |
| |
| if (SCpnt) { |
| |
| /* |
| * See if the target stored any scsi status information |
| */ |
| if (STATUS_GET_LENGTH(scsi_id->status_block.ORB_offset_hi_misc) > 1) { |
| /* |
| * Translate SBP-2 status to SCSI sense data |
| */ |
| SBP2_DEBUG("CHECK CONDITION"); |
| scsi_status = sbp2_status_to_sense_data((unchar *)&scsi_id->status_block, SCpnt->sense_buffer); |
| } |
| |
| /* |
| * Check to see if the dead bit is set. If so, we'll have to initiate |
| * a fetch agent reset. |
| */ |
| if (STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc)) { |
| |
| /* |
| * Initiate a fetch agent reset. |
| */ |
| SBP2_DEBUG("Dead bit set - initiating fetch agent reset"); |
| sbp2_agent_reset(scsi_id, 0); |
| } |
| |
| SBP2_ORB_DEBUG("completing command orb %p", &command->command_orb); |
| } |
| |
| /* |
| * Check here to see if there are no commands in-use. If there are none, we can |
| * null out last orb so that next time around we write directly to the orb pointer... |
| * Quick start saves one 1394 bus transaction. |
| */ |
| spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
| if (list_empty(&scsi_id->sbp2_command_orb_inuse)) { |
| scsi_id->last_orb = NULL; |
| } |
| spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
| |
| } else { |
| |
| /* |
| * It's probably a login/logout/reconnect status. |
| */ |
| if ((scsi_id->login_orb_dma == scsi_id->status_block.ORB_offset_lo) || |
| (scsi_id->query_logins_orb_dma == scsi_id->status_block.ORB_offset_lo) || |
| (scsi_id->reconnect_orb_dma == scsi_id->status_block.ORB_offset_lo) || |
| (scsi_id->logout_orb_dma == scsi_id->status_block.ORB_offset_lo)) { |
| atomic_set(&scsi_id->sbp2_login_complete, 1); |
| } |
| } |
| |
| if (SCpnt) { |
| |
| /* Complete the SCSI command. */ |
| SBP2_DEBUG("Completing SCSI command"); |
| sbp2scsi_complete_command(scsi_id, scsi_status, SCpnt, |
| command->Current_done); |
| SBP2_ORB_DEBUG("command orb completed"); |
| } |
| |
| return RCODE_COMPLETE; |
| } |
| |
| /************************************** |
| * SCSI interface related section |
| **************************************/ |
| |
| /* |
| * This routine is the main request entry routine for doing I/O. It is |
| * called from the scsi stack directly. |
| */ |
| static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt, |
| void (*done)(struct scsi_cmnd *)) |
| { |
| struct scsi_id_instance_data *scsi_id = |
| (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; |
| struct sbp2scsi_host_info *hi; |
| int result = DID_NO_CONNECT << 16; |
| |
| SBP2_DEBUG("sbp2scsi_queuecommand"); |
| |
| if (!sbp2util_node_is_available(scsi_id)) |
| goto done; |
| |
| hi = scsi_id->hi; |
| |
| if (!hi) { |
| SBP2_ERR("sbp2scsi_host_info is NULL - this is bad!"); |
| goto done; |
| } |
| |
| /* |
| * Until we handle multiple luns, just return selection time-out |
| * to any IO directed at non-zero LUNs |
| */ |
| if (SCpnt->device->lun) |
| goto done; |
| |
| /* |
| * Check for request sense command, and handle it here |
| * (autorequest sense) |
| */ |
| if (SCpnt->cmnd[0] == REQUEST_SENSE) { |
| SBP2_DEBUG("REQUEST_SENSE"); |
| memcpy(SCpnt->request_buffer, SCpnt->sense_buffer, SCpnt->request_bufflen); |
| memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer)); |
| sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_GOOD, SCpnt, done); |
| return 0; |
| } |
| |
| /* |
| * Check to see if we are in the middle of a bus reset. |
| */ |
| if (!hpsb_node_entry_valid(scsi_id->ne)) { |
| SBP2_ERR("Bus reset in progress - rejecting command"); |
| result = DID_BUS_BUSY << 16; |
| goto done; |
| } |
| |
| /* |
| * Bidirectional commands are not yet implemented, |
| * and unknown transfer direction not handled. |
| */ |
| if (SCpnt->sc_data_direction == DMA_BIDIRECTIONAL) { |
| SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command"); |
| result = DID_ERROR << 16; |
| goto done; |
| } |
| |
| /* |
| * Try and send our SCSI command |
| */ |
| if (sbp2_send_command(scsi_id, SCpnt, done)) { |
| SBP2_ERR("Error sending SCSI command"); |
| sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_SELECTION_TIMEOUT, |
| SCpnt, done); |
| } |
| return 0; |
| |
| done: |
| SCpnt->result = result; |
| done(SCpnt); |
| return 0; |
| } |
| |
| /* |
| * This function is called in order to complete all outstanding SBP-2 |
| * commands (in case of resets, etc.). |
| */ |
| static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id, |
| u32 status) |
| { |
| struct sbp2scsi_host_info *hi = scsi_id->hi; |
| struct list_head *lh; |
| struct sbp2_command_info *command; |
| unsigned long flags; |
| |
| SBP2_DEBUG("sbp2scsi_complete_all_commands"); |
| |
| spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
| while (!list_empty(&scsi_id->sbp2_command_orb_inuse)) { |
| SBP2_DEBUG("Found pending command to complete"); |
| lh = scsi_id->sbp2_command_orb_inuse.next; |
| command = list_entry(lh, struct sbp2_command_info, list); |
| pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma, |
| sizeof(struct sbp2_command_orb), |
| PCI_DMA_BIDIRECTIONAL); |
| pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma, |
| sizeof(command->scatter_gather_element), |
| PCI_DMA_BIDIRECTIONAL); |
| sbp2util_mark_command_completed(scsi_id, command); |
| if (command->Current_SCpnt) { |
| command->Current_SCpnt->result = status << 16; |
| command->Current_done(command->Current_SCpnt); |
| } |
| } |
| spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
| |
| return; |
| } |
| |
| /* |
| * This function is called in order to complete a regular SBP-2 command. |
| * |
| * This can be called in interrupt context. |
| */ |
| static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id, |
| u32 scsi_status, struct scsi_cmnd *SCpnt, |
| void (*done)(struct scsi_cmnd *)) |
| { |
| SBP2_DEBUG("sbp2scsi_complete_command"); |
| |
| /* |
| * Sanity |
| */ |
| if (!SCpnt) { |
| SBP2_ERR("SCpnt is NULL"); |
| return; |
| } |
| |
| /* |
| * If a bus reset is in progress and there was an error, don't |
| * complete the command, just let it get retried at the end of the |
| * bus reset. |
| */ |
| if (!hpsb_node_entry_valid(scsi_id->ne) |
| && (scsi_status != SBP2_SCSI_STATUS_GOOD)) { |
| SBP2_ERR("Bus reset in progress - retry command later"); |
| return; |
| } |
| |
| /* |
| * Switch on scsi status |
| */ |
| switch (scsi_status) { |
| case SBP2_SCSI_STATUS_GOOD: |
| SCpnt->result = DID_OK; |
| break; |
| |
| case SBP2_SCSI_STATUS_BUSY: |
| SBP2_ERR("SBP2_SCSI_STATUS_BUSY"); |
| SCpnt->result = DID_BUS_BUSY << 16; |
| break; |
| |
| case SBP2_SCSI_STATUS_CHECK_CONDITION: |
| SBP2_DEBUG("SBP2_SCSI_STATUS_CHECK_CONDITION"); |
| SCpnt->result = CHECK_CONDITION << 1; |
| |
| /* |
| * Debug stuff |
| */ |
| #if CONFIG_IEEE1394_SBP2_DEBUG >= 1 |
| scsi_print_command(SCpnt); |
| scsi_print_sense("bh", SCpnt); |
| #endif |
| |
| break; |
| |
| case SBP2_SCSI_STATUS_SELECTION_TIMEOUT: |
| SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT"); |
| SCpnt->result = DID_NO_CONNECT << 16; |
| scsi_print_command(SCpnt); |
| break; |
| |
| case SBP2_SCSI_STATUS_CONDITION_MET: |
| case SBP2_SCSI_STATUS_RESERVATION_CONFLICT: |
| case SBP2_SCSI_STATUS_COMMAND_TERMINATED: |
| SBP2_ERR("Bad SCSI status = %x", scsi_status); |
| SCpnt->result = DID_ERROR << 16; |
| scsi_print_command(SCpnt); |
| break; |
| |
| default: |
| SBP2_ERR("Unsupported SCSI status = %x", scsi_status); |
| SCpnt->result = DID_ERROR << 16; |
| } |
| |
| /* |
| * Take care of any sbp2 response data mucking here (RBC stuff, etc.) |
| */ |
| if (SCpnt->result == DID_OK) { |
| sbp2_check_sbp2_response(scsi_id, SCpnt); |
| } |
| |
| /* |
| * If a bus reset is in progress and there was an error, complete |
| * the command as busy so that it will get retried. |
| */ |
| if (!hpsb_node_entry_valid(scsi_id->ne) |
| && (scsi_status != SBP2_SCSI_STATUS_GOOD)) { |
| SBP2_ERR("Completing command with busy (bus reset)"); |
| SCpnt->result = DID_BUS_BUSY << 16; |
| } |
| |
| /* |
| * If a unit attention occurs, return busy status so it gets |
| * retried... it could have happened because of a 1394 bus reset |
| * or hot-plug... |
| */ |
| #if 0 |
| if ((scsi_status == SBP2_SCSI_STATUS_CHECK_CONDITION) && |
| (SCpnt->sense_buffer[2] == UNIT_ATTENTION)) { |
| SBP2_DEBUG("UNIT ATTENTION - return busy"); |
| SCpnt->result = DID_BUS_BUSY << 16; |
| } |
| #endif |
| |
| /* |
| * Tell scsi stack that we're done with this command |
| */ |
| done(SCpnt); |
| } |
| |
| static int sbp2scsi_slave_alloc(struct scsi_device *sdev) |
| { |
| ((struct scsi_id_instance_data *)sdev->host->hostdata[0])->sdev = sdev; |
| return 0; |
| } |
| |
| static int sbp2scsi_slave_configure(struct scsi_device *sdev) |
| { |
| blk_queue_dma_alignment(sdev->request_queue, (512 - 1)); |
| sdev->use_10_for_rw = 1; |
| sdev->use_10_for_ms = 1; |
| return 0; |
| } |
| |
| static void sbp2scsi_slave_destroy(struct scsi_device *sdev) |
| { |
| ((struct scsi_id_instance_data *)sdev->host->hostdata[0])->sdev = NULL; |
| return; |
| } |
| |
| /* |
| * Called by scsi stack when something has really gone wrong. Usually |
| * called when a command has timed-out for some reason. |
| */ |
| static int sbp2scsi_abort(struct scsi_cmnd *SCpnt) |
| { |
| struct scsi_id_instance_data *scsi_id = |
| (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; |
| struct sbp2scsi_host_info *hi = scsi_id->hi; |
| struct sbp2_command_info *command; |
| |
| SBP2_ERR("aborting sbp2 command"); |
| scsi_print_command(SCpnt); |
| |
| if (sbp2util_node_is_available(scsi_id)) { |
| |
| /* |
| * Right now, just return any matching command structures |
| * to the free pool. |
| */ |
| command = sbp2util_find_command_for_SCpnt(scsi_id, SCpnt); |
| if (command) { |
| SBP2_DEBUG("Found command to abort"); |
| pci_dma_sync_single_for_cpu(hi->host->pdev, |
| command->command_orb_dma, |
| sizeof(struct sbp2_command_orb), |
| PCI_DMA_BIDIRECTIONAL); |
| pci_dma_sync_single_for_cpu(hi->host->pdev, |
| command->sge_dma, |
| sizeof(command->scatter_gather_element), |
| PCI_DMA_BIDIRECTIONAL); |
| sbp2util_mark_command_completed(scsi_id, command); |
| if (command->Current_SCpnt) { |
| command->Current_SCpnt->result = DID_ABORT << 16; |
| command->Current_done(command->Current_SCpnt); |
| } |
| } |
| |
| /* |
| * Initiate a fetch agent reset. |
| */ |
| sbp2_agent_reset(scsi_id, 0); |
| sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY); |
| } |
| |
| return SUCCESS; |
| } |
| |
| /* |
| * Called by scsi stack when something has really gone wrong. |
| */ |
| static int sbp2scsi_reset(struct scsi_cmnd *SCpnt) |
| { |
| struct scsi_id_instance_data *scsi_id = |
| (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; |
| |
| SBP2_ERR("reset requested"); |
| |
| if (sbp2util_node_is_available(scsi_id)) { |
| SBP2_ERR("Generating sbp2 fetch agent reset"); |
| sbp2_agent_reset(scsi_id, 0); |
| } |
| |
| return SUCCESS; |
| } |
| |
| static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct scsi_device *sdev; |
| struct scsi_id_instance_data *scsi_id; |
| int lun; |
| |
| if (!(sdev = to_scsi_device(dev))) |
| return 0; |
| |
| if (!(scsi_id = (struct scsi_id_instance_data *)sdev->host->hostdata[0])) |
| return 0; |
| |
| lun = ORB_SET_LUN(scsi_id->sbp2_lun); |
| |
| return sprintf(buf, "%016Lx:%d:%d\n", (unsigned long long)scsi_id->ne->guid, |
| scsi_id->ud->id, lun); |
| } |
| static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); |
| |
| static struct device_attribute *sbp2_sysfs_sdev_attrs[] = { |
| &dev_attr_ieee1394_id, |
| NULL |
| }; |
| |
| MODULE_AUTHOR("Ben Collins <bcollins@debian.org>"); |
| MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver"); |
| MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME); |
| MODULE_LICENSE("GPL"); |
| |
| /* SCSI host template */ |
| static struct scsi_host_template scsi_driver_template = { |
| .module = THIS_MODULE, |
| .name = "SBP-2 IEEE-1394", |
| .proc_name = SBP2_DEVICE_NAME, |
| .queuecommand = sbp2scsi_queuecommand, |
| .eh_abort_handler = sbp2scsi_abort, |
| .eh_device_reset_handler = sbp2scsi_reset, |
| .slave_alloc = sbp2scsi_slave_alloc, |
| .slave_configure = sbp2scsi_slave_configure, |
| .slave_destroy = sbp2scsi_slave_destroy, |
| .this_id = -1, |
| .sg_tablesize = SG_ALL, |
| .use_clustering = ENABLE_CLUSTERING, |
| .cmd_per_lun = SBP2_MAX_CMDS, |
| .can_queue = SBP2_MAX_CMDS, |
| .emulated = 1, |
| .sdev_attrs = sbp2_sysfs_sdev_attrs, |
| }; |
| |
| static int sbp2_module_init(void) |
| { |
| int ret; |
| |
| SBP2_DEBUG("sbp2_module_init"); |
| |
| /* Module load debug option to force one command at a time (serializing I/O) */ |
| if (serialize_io) { |
| SBP2_INFO("Driver forced to serialize I/O (serialize_io=1)"); |
| SBP2_INFO("Try serialize_io=0 for better performance"); |
| scsi_driver_template.can_queue = 1; |
| scsi_driver_template.cmd_per_lun = 1; |
| } |
| |
| /* Set max sectors (module load option). Default is 255 sectors. */ |
| scsi_driver_template.max_sectors = max_sectors; |
| |
| /* Register our high level driver with 1394 stack */ |
| hpsb_register_highlevel(&sbp2_highlevel); |
| |
| ret = hpsb_register_protocol(&sbp2_driver); |
| if (ret) { |
| SBP2_ERR("Failed to register protocol"); |
| hpsb_unregister_highlevel(&sbp2_highlevel); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static void __exit sbp2_module_exit(void) |
| { |
| SBP2_DEBUG("sbp2_module_exit"); |
| |
| hpsb_unregister_protocol(&sbp2_driver); |
| |
| hpsb_unregister_highlevel(&sbp2_highlevel); |
| } |
| |
| module_init(sbp2_module_init); |
| module_exit(sbp2_module_exit); |