Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * sbp2.c - SBP-2 protocol driver for IEEE-1394 |
| 3 | * |
| 4 | * Copyright (C) 2000 James Goodwin, Filanet Corporation (www.filanet.com) |
| 5 | * jamesg@filanet.com (JSG) |
| 6 | * |
| 7 | * Copyright (C) 2003 Ben Collins <bcollins@debian.org> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software Foundation, |
| 21 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 22 | */ |
| 23 | |
| 24 | /* |
| 25 | * Brief Description: |
| 26 | * |
| 27 | * This driver implements the Serial Bus Protocol 2 (SBP-2) over IEEE-1394 |
| 28 | * under Linux. The SBP-2 driver is implemented as an IEEE-1394 high-level |
| 29 | * driver. It also registers as a SCSI lower-level driver in order to accept |
| 30 | * SCSI commands for transport using SBP-2. |
| 31 | * |
Stefan Richter | 2a533b1 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 32 | * You may access any attached SBP-2 (usually storage devices) as regular |
| 33 | * SCSI devices. E.g. mount /dev/sda1, fdisk, mkfs, etc.. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | * |
Stefan Richter | 2a533b1 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 35 | * See http://www.t10.org/drafts.htm#sbp2 for the final draft of the SBP-2 |
| 36 | * specification and for where to purchase the official standard. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | * |
Stefan Richter | 2a533b1 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 38 | * TODO: |
| 39 | * - look into possible improvements of the SCSI error handlers |
| 40 | * - handle Unit_Characteristics.mgt_ORB_timeout and .ORB_size |
| 41 | * - handle Logical_Unit_Number.ordered |
| 42 | * - handle src == 1 in status blocks |
| 43 | * - reimplement the DMA mapping in absence of physical DMA so that |
| 44 | * bus_to_virt is no longer required |
| 45 | * - debug the handling of absent physical DMA |
| 46 | * - replace CONFIG_IEEE1394_SBP2_PHYS_DMA by automatic detection |
| 47 | * (this is easy but depends on the previous two TODO items) |
| 48 | * - make the parameter serialize_io configurable per device |
| 49 | * - move all requests to fetch agent registers into non-atomic context, |
| 50 | * replace all usages of sbp2util_node_write_no_wait by true transactions |
| 51 | * - convert to generic DMA mapping API to eliminate dependency on PCI |
| 52 | * Grep for inline FIXME comments below. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | */ |
| 54 | |
Stefan Richter | 902abed | 2006-08-14 18:56:00 +0200 | [diff] [blame] | 55 | #include <linux/blkdev.h> |
| 56 | #include <linux/compiler.h> |
| 57 | #include <linux/delay.h> |
| 58 | #include <linux/device.h> |
| 59 | #include <linux/dma-mapping.h> |
| 60 | #include <linux/gfp.h> |
| 61 | #include <linux/init.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | #include <linux/kernel.h> |
| 63 | #include <linux/list.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | #include <linux/module.h> |
| 65 | #include <linux/moduleparam.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | #include <linux/pci.h> |
Stefan Richter | 902abed | 2006-08-14 18:56:00 +0200 | [diff] [blame] | 67 | #include <linux/slab.h> |
| 68 | #include <linux/spinlock.h> |
| 69 | #include <linux/stat.h> |
| 70 | #include <linux/string.h> |
| 71 | #include <linux/stringify.h> |
| 72 | #include <linux/types.h> |
Stefan Richter | e8398bb | 2006-07-23 22:19:00 +0200 | [diff] [blame] | 73 | #include <linux/wait.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | #include <asm/byteorder.h> |
Stefan Richter | 902abed | 2006-08-14 18:56:00 +0200 | [diff] [blame] | 76 | #include <asm/errno.h> |
| 77 | #include <asm/param.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | #include <asm/scatterlist.h> |
Stefan Richter | 902abed | 2006-08-14 18:56:00 +0200 | [diff] [blame] | 79 | #include <asm/system.h> |
| 80 | #include <asm/types.h> |
| 81 | |
| 82 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA |
| 83 | #include <asm/io.h> /* for bus_to_virt */ |
| 84 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | |
| 86 | #include <scsi/scsi.h> |
| 87 | #include <scsi/scsi_cmnd.h> |
| 88 | #include <scsi/scsi_dbg.h> |
| 89 | #include <scsi/scsi_device.h> |
| 90 | #include <scsi/scsi_host.h> |
| 91 | |
| 92 | #include "csr1212.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | #include "highlevel.h" |
Stefan Richter | 902abed | 2006-08-14 18:56:00 +0200 | [diff] [blame] | 94 | #include "hosts.h" |
| 95 | #include "ieee1394.h" |
| 96 | #include "ieee1394_core.h" |
| 97 | #include "ieee1394_hotplug.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | #include "ieee1394_transactions.h" |
Stefan Richter | 902abed | 2006-08-14 18:56:00 +0200 | [diff] [blame] | 99 | #include "ieee1394_types.h" |
| 100 | #include "nodemgr.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | #include "sbp2.h" |
| 102 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | /* |
| 104 | * Module load parameter definitions |
| 105 | */ |
| 106 | |
| 107 | /* |
| 108 | * Change max_speed on module load if you have a bad IEEE-1394 |
| 109 | * controller that has trouble running 2KB packets at 400mb. |
| 110 | * |
| 111 | * NOTE: On certain OHCI parts I have seen short packets on async transmit |
| 112 | * (probably due to PCI latency/throughput issues with the part). You can |
| 113 | * bump down the speed if you are running into problems. |
| 114 | */ |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 115 | static int sbp2_max_speed = IEEE1394_SPEED_MAX; |
| 116 | module_param_named(max_speed, sbp2_max_speed, int, 0644); |
Stefan Richter | 28b0667 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 117 | MODULE_PARM_DESC(max_speed, "Force max speed " |
| 118 | "(3 = 800Mb/s, 2 = 400Mb/s, 1 = 200Mb/s, 0 = 100Mb/s)"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | |
| 120 | /* |
| 121 | * Set serialize_io to 1 if you'd like only one scsi command sent |
| 122 | * down to us at a time (debugging). This might be necessary for very |
| 123 | * badly behaved sbp2 devices. |
| 124 | */ |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 125 | static int sbp2_serialize_io = 1; |
| 126 | module_param_named(serialize_io, sbp2_serialize_io, int, 0444); |
| 127 | MODULE_PARM_DESC(serialize_io, "Serialize I/O coming from scsi drivers " |
| 128 | "(default = 1, faster = 0)"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | |
| 130 | /* |
| 131 | * Bump up max_sectors if you'd like to support very large sized |
| 132 | * transfers. Please note that some older sbp2 bridge chips are broken for |
| 133 | * transfers greater or equal to 128KB. Default is a value of 255 |
| 134 | * sectors, or just under 128KB (at 512 byte sector size). I can note that |
| 135 | * the Oxsemi sbp2 chipsets have no problems supporting very large |
| 136 | * transfer sizes. |
| 137 | */ |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 138 | static int sbp2_max_sectors = SBP2_MAX_SECTORS; |
| 139 | module_param_named(max_sectors, sbp2_max_sectors, int, 0444); |
| 140 | MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported " |
| 141 | "(default = " __stringify(SBP2_MAX_SECTORS) ")"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | |
| 143 | /* |
| 144 | * Exclusive login to sbp2 device? In most cases, the sbp2 driver should |
| 145 | * do an exclusive login, as it's generally unsafe to have two hosts |
| 146 | * talking to a single sbp2 device at the same time (filesystem coherency, |
| 147 | * etc.). If you're running an sbp2 device that supports multiple logins, |
| 148 | * and you're either running read-only filesystems or some sort of special |
Ben Collins | 20f4578 | 2006-06-12 18:13:11 -0400 | [diff] [blame] | 149 | * filesystem supporting multiple hosts, e.g. OpenGFS, Oracle Cluster |
| 150 | * File System, or Lustre, then set exclusive_login to zero. |
| 151 | * |
| 152 | * So far only bridges from Oxford Semiconductor are known to support |
| 153 | * concurrent logins. Depending on firmware, four or two concurrent logins |
| 154 | * are possible on OXFW911 and newer Oxsemi bridges. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | */ |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 156 | static int sbp2_exclusive_login = 1; |
| 157 | module_param_named(exclusive_login, sbp2_exclusive_login, int, 0644); |
| 158 | MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device " |
| 159 | "(default = 1)"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | |
| 161 | /* |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 162 | * If any of the following workarounds is required for your device to work, |
| 163 | * please submit the kernel messages logged by sbp2 to the linux1394-devel |
| 164 | * mailing list. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | * |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 166 | * - 128kB max transfer |
| 167 | * Limit transfer size. Necessary for some old bridges. |
| 168 | * |
| 169 | * - 36 byte inquiry |
| 170 | * When scsi_mod probes the device, let the inquiry command look like that |
| 171 | * from MS Windows. |
| 172 | * |
| 173 | * - skip mode page 8 |
| 174 | * Suppress sending of mode_sense for mode page 8 if the device pretends to |
| 175 | * support the SCSI Primary Block commands instead of Reduced Block Commands. |
Stefan Richter | e9a1c52 | 2006-05-15 22:06:37 +0200 | [diff] [blame] | 176 | * |
| 177 | * - fix capacity |
| 178 | * Tell sd_mod to correct the last sector number reported by read_capacity. |
| 179 | * Avoids access beyond actual disk limits on devices with an off-by-one bug. |
| 180 | * Don't use this with devices which don't have this bug. |
Stefan Richter | 679c0cd | 2006-05-15 22:08:09 +0200 | [diff] [blame] | 181 | * |
| 182 | * - override internal blacklist |
| 183 | * Instead of adding to the built-in blacklist, use only the workarounds |
| 184 | * specified in the module load parameter. |
| 185 | * Useful if a blacklist entry interfered with a non-broken device. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | */ |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 187 | static int sbp2_default_workarounds; |
| 188 | module_param_named(workarounds, sbp2_default_workarounds, int, 0644); |
| 189 | MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0" |
| 190 | ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS) |
| 191 | ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36) |
| 192 | ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8) |
Stefan Richter | e9a1c52 | 2006-05-15 22:06:37 +0200 | [diff] [blame] | 193 | ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY) |
Stefan Richter | 679c0cd | 2006-05-15 22:08:09 +0200 | [diff] [blame] | 194 | ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE) |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 195 | ", or a combination)"); |
| 196 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | |
Stefan Richter | edf1fb2 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 198 | #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args) |
| 199 | #define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | /* |
| 202 | * Globals |
| 203 | */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 204 | static void sbp2scsi_complete_all_commands(struct sbp2_lu *, u32); |
| 205 | static void sbp2scsi_complete_command(struct sbp2_lu *, u32, struct scsi_cmnd *, |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 206 | void (*)(struct scsi_cmnd *)); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 207 | static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *); |
| 208 | static int sbp2_start_device(struct sbp2_lu *); |
| 209 | static void sbp2_remove_device(struct sbp2_lu *); |
| 210 | static int sbp2_login_device(struct sbp2_lu *); |
| 211 | static int sbp2_reconnect_device(struct sbp2_lu *); |
| 212 | static int sbp2_logout_device(struct sbp2_lu *); |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 213 | static void sbp2_host_reset(struct hpsb_host *); |
| 214 | static int sbp2_handle_status_write(struct hpsb_host *, int, int, quadlet_t *, |
| 215 | u64, size_t, u16); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 216 | static int sbp2_agent_reset(struct sbp2_lu *, int); |
| 217 | static void sbp2_parse_unit_directory(struct sbp2_lu *, |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 218 | struct unit_directory *); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 219 | static int sbp2_set_busy_timeout(struct sbp2_lu *); |
| 220 | static int sbp2_max_speed_and_size(struct sbp2_lu *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | |
| 223 | static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC }; |
| 224 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | static struct hpsb_highlevel sbp2_highlevel = { |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 226 | .name = SBP2_DEVICE_NAME, |
| 227 | .host_reset = sbp2_host_reset, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | }; |
| 229 | |
| 230 | static struct hpsb_address_ops sbp2_ops = { |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 231 | .write = sbp2_handle_status_write |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | }; |
| 233 | |
| 234 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 235 | static int sbp2_handle_physdma_write(struct hpsb_host *, int, int, quadlet_t *, |
| 236 | u64, size_t, u16); |
| 237 | static int sbp2_handle_physdma_read(struct hpsb_host *, int, quadlet_t *, u64, |
| 238 | size_t, u16); |
| 239 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | static struct hpsb_address_ops sbp2_physdma_ops = { |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 241 | .read = sbp2_handle_physdma_read, |
| 242 | .write = sbp2_handle_physdma_write, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | }; |
| 244 | #endif |
| 245 | |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 246 | |
| 247 | /* |
| 248 | * Interface to driver core and IEEE 1394 core |
| 249 | */ |
| 250 | static struct ieee1394_device_id sbp2_id_table[] = { |
| 251 | { |
| 252 | .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION, |
| 253 | .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff, |
| 254 | .version = SBP2_SW_VERSION_ENTRY & 0xffffff}, |
| 255 | {} |
| 256 | }; |
| 257 | MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); |
| 258 | |
| 259 | static int sbp2_probe(struct device *); |
| 260 | static int sbp2_remove(struct device *); |
| 261 | static int sbp2_update(struct unit_directory *); |
| 262 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | static struct hpsb_protocol_driver sbp2_driver = { |
| 264 | .name = "SBP2 Driver", |
| 265 | .id_table = sbp2_id_table, |
| 266 | .update = sbp2_update, |
| 267 | .driver = { |
| 268 | .name = SBP2_DEVICE_NAME, |
| 269 | .bus = &ieee1394_bus_type, |
| 270 | .probe = sbp2_probe, |
| 271 | .remove = sbp2_remove, |
| 272 | }, |
| 273 | }; |
| 274 | |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 275 | |
| 276 | /* |
| 277 | * Interface to SCSI core |
| 278 | */ |
| 279 | static int sbp2scsi_queuecommand(struct scsi_cmnd *, |
| 280 | void (*)(struct scsi_cmnd *)); |
| 281 | static int sbp2scsi_abort(struct scsi_cmnd *); |
| 282 | static int sbp2scsi_reset(struct scsi_cmnd *); |
| 283 | static int sbp2scsi_slave_alloc(struct scsi_device *); |
| 284 | static int sbp2scsi_slave_configure(struct scsi_device *); |
| 285 | static void sbp2scsi_slave_destroy(struct scsi_device *); |
| 286 | static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *, |
| 287 | struct device_attribute *, char *); |
| 288 | |
| 289 | static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); |
| 290 | |
| 291 | static struct device_attribute *sbp2_sysfs_sdev_attrs[] = { |
| 292 | &dev_attr_ieee1394_id, |
| 293 | NULL |
| 294 | }; |
| 295 | |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 296 | static struct scsi_host_template sbp2_shost_template = { |
Stefan Richter | ea42ea0 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 297 | .module = THIS_MODULE, |
| 298 | .name = "SBP-2 IEEE-1394", |
| 299 | .proc_name = SBP2_DEVICE_NAME, |
| 300 | .queuecommand = sbp2scsi_queuecommand, |
| 301 | .eh_abort_handler = sbp2scsi_abort, |
| 302 | .eh_device_reset_handler = sbp2scsi_reset, |
| 303 | .slave_alloc = sbp2scsi_slave_alloc, |
| 304 | .slave_configure = sbp2scsi_slave_configure, |
| 305 | .slave_destroy = sbp2scsi_slave_destroy, |
| 306 | .this_id = -1, |
| 307 | .sg_tablesize = SG_ALL, |
| 308 | .use_clustering = ENABLE_CLUSTERING, |
| 309 | .cmd_per_lun = SBP2_MAX_CMDS, |
| 310 | .can_queue = SBP2_MAX_CMDS, |
| 311 | .emulated = 1, |
| 312 | .sdev_attrs = sbp2_sysfs_sdev_attrs, |
| 313 | }; |
| 314 | |
| 315 | |
Stefan Richter | a80614d | 2006-02-14 22:04:19 -0500 | [diff] [blame] | 316 | /* |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 317 | * List of devices with known bugs. |
| 318 | * |
| 319 | * The firmware_revision field, masked with 0xffff00, is the best indicator |
| 320 | * for the type of bridge chip of a device. It yields a few false positives |
| 321 | * but this did not break correctly behaving devices so far. |
Stefan Richter | a80614d | 2006-02-14 22:04:19 -0500 | [diff] [blame] | 322 | */ |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 323 | static const struct { |
| 324 | u32 firmware_revision; |
Stefan Richter | e9a1c52 | 2006-05-15 22:06:37 +0200 | [diff] [blame] | 325 | u32 model_id; |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 326 | unsigned workarounds; |
| 327 | } sbp2_workarounds_table[] = { |
Ben Collins | 4b9a334 | 2006-06-12 18:10:18 -0400 | [diff] [blame] | 328 | /* DViCO Momobay CX-1 with TSB42AA9 bridge */ { |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 329 | .firmware_revision = 0x002800, |
Ben Collins | 4b9a334 | 2006-06-12 18:10:18 -0400 | [diff] [blame] | 330 | .model_id = 0x001010, |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 331 | .workarounds = SBP2_WORKAROUND_INQUIRY_36 | |
| 332 | SBP2_WORKAROUND_MODE_SENSE_8, |
| 333 | }, |
| 334 | /* Initio bridges, actually only needed for some older ones */ { |
| 335 | .firmware_revision = 0x000200, |
| 336 | .workarounds = SBP2_WORKAROUND_INQUIRY_36, |
| 337 | }, |
| 338 | /* Symbios bridge */ { |
| 339 | .firmware_revision = 0xa0b800, |
| 340 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, |
Stefan Richter | e9a1c52 | 2006-05-15 22:06:37 +0200 | [diff] [blame] | 341 | }, |
| 342 | /* |
| 343 | * Note about the following Apple iPod blacklist entries: |
| 344 | * |
| 345 | * There are iPods (2nd gen, 3rd gen) with model_id==0. Since our |
| 346 | * matching logic treats 0 as a wildcard, we cannot match this ID |
| 347 | * without rewriting the matching routine. Fortunately these iPods |
| 348 | * do not feature the read_capacity bug according to one report. |
| 349 | * Read_capacity behaviour as well as model_id could change due to |
| 350 | * Apple-supplied firmware updates though. |
| 351 | */ |
| 352 | /* iPod 4th generation */ { |
| 353 | .firmware_revision = 0x0a2700, |
| 354 | .model_id = 0x000021, |
| 355 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, |
| 356 | }, |
| 357 | /* iPod mini */ { |
| 358 | .firmware_revision = 0x0a2700, |
| 359 | .model_id = 0x000023, |
| 360 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, |
| 361 | }, |
| 362 | /* iPod Photo */ { |
| 363 | .firmware_revision = 0x0a2700, |
| 364 | .model_id = 0x00007e, |
| 365 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 366 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | }; |
| 368 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | /************************************** |
| 370 | * General utility functions |
| 371 | **************************************/ |
| 372 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | #ifndef __BIG_ENDIAN |
| 374 | /* |
| 375 | * Converts a buffer from be32 to cpu byte ordering. Length is in bytes. |
| 376 | */ |
Stefan Richter | 2b01b80 | 2006-07-03 12:02:28 -0400 | [diff] [blame] | 377 | static inline void sbp2util_be32_to_cpu_buffer(void *buffer, int length) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | { |
| 379 | u32 *temp = buffer; |
| 380 | |
| 381 | for (length = (length >> 2); length--; ) |
| 382 | temp[length] = be32_to_cpu(temp[length]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | } |
| 384 | |
| 385 | /* |
| 386 | * Converts a buffer from cpu to be32 byte ordering. Length is in bytes. |
| 387 | */ |
Stefan Richter | 2b01b80 | 2006-07-03 12:02:28 -0400 | [diff] [blame] | 388 | static inline void sbp2util_cpu_to_be32_buffer(void *buffer, int length) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | { |
| 390 | u32 *temp = buffer; |
| 391 | |
| 392 | for (length = (length >> 2); length--; ) |
| 393 | temp[length] = cpu_to_be32(temp[length]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | } |
| 395 | #else /* BIG_ENDIAN */ |
| 396 | /* Why waste the cpu cycles? */ |
Stefan Richter | 611aa19 | 2006-08-02 18:44:00 +0200 | [diff] [blame] | 397 | #define sbp2util_be32_to_cpu_buffer(x,y) do {} while (0) |
| 398 | #define sbp2util_cpu_to_be32_buffer(x,y) do {} while (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | #endif |
| 400 | |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 401 | static DECLARE_WAIT_QUEUE_HEAD(sbp2_access_wq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | |
Stefan Richter | e8398bb | 2006-07-23 22:19:00 +0200 | [diff] [blame] | 403 | /* |
| 404 | * Waits for completion of an SBP-2 access request. |
| 405 | * Returns nonzero if timed out or prematurely interrupted. |
| 406 | */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 407 | static int sbp2util_access_timeout(struct sbp2_lu *lu, int timeout) |
Stefan Richter | e8398bb | 2006-07-23 22:19:00 +0200 | [diff] [blame] | 408 | { |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 409 | long leftover; |
Stefan Richter | e8398bb | 2006-07-23 22:19:00 +0200 | [diff] [blame] | 410 | |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 411 | leftover = wait_event_interruptible_timeout( |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 412 | sbp2_access_wq, lu->access_complete, timeout); |
| 413 | lu->access_complete = 0; |
Stefan Richter | e8398bb | 2006-07-23 22:19:00 +0200 | [diff] [blame] | 414 | return leftover <= 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | } |
| 416 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 417 | static void sbp2_free_packet(void *packet) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | { |
| 419 | hpsb_free_tlabel(packet); |
| 420 | hpsb_free_packet(packet); |
| 421 | } |
| 422 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 423 | /* |
| 424 | * This is much like hpsb_node_write(), except it ignores the response |
| 425 | * subaction and returns immediately. Can be used from atomic context. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | */ |
| 427 | static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr, |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 428 | quadlet_t *buf, size_t len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | { |
| 430 | struct hpsb_packet *packet; |
| 431 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 432 | packet = hpsb_make_writepacket(ne->host, ne->nodeid, addr, buf, len); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 433 | if (!packet) |
| 434 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 436 | hpsb_set_packet_complete_task(packet, sbp2_free_packet, packet); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | hpsb_node_fill_packet(ne, packet); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 438 | if (hpsb_send_packet(packet) < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | sbp2_free_packet(packet); |
| 440 | return -EIO; |
| 441 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | return 0; |
| 443 | } |
| 444 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 445 | static void sbp2util_notify_fetch_agent(struct sbp2_lu *lu, u64 offset, |
| 446 | quadlet_t *data, size_t len) |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 447 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 448 | /* There is a small window after a bus reset within which the node |
| 449 | * entry's generation is current but the reconnect wasn't completed. */ |
| 450 | if (unlikely(atomic_read(&lu->state) == SBP2LU_STATE_IN_RESET)) |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 451 | return; |
| 452 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 453 | if (hpsb_node_write(lu->ne, lu->command_block_agent_addr + offset, |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 454 | data, len)) |
| 455 | SBP2_ERR("sbp2util_notify_fetch_agent failed."); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 456 | |
| 457 | /* Now accept new SCSI commands, unless a bus reset happended during |
| 458 | * hpsb_node_write. */ |
| 459 | if (likely(atomic_read(&lu->state) != SBP2LU_STATE_IN_RESET)) |
| 460 | scsi_unblock_requests(lu->shost); |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 461 | } |
| 462 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 463 | static void sbp2util_write_orb_pointer(struct work_struct *work) |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 464 | { |
| 465 | quadlet_t data[2]; |
| 466 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 467 | data[0] = ORB_SET_NODE_ID((container_of(work, struct sbp2_lu, protocol_work))->hi->host->node_id); |
| 468 | data[1] = (container_of(work, struct sbp2_lu, protocol_work))->last_orb_dma; |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 469 | sbp2util_cpu_to_be32_buffer(data, 8); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 470 | sbp2util_notify_fetch_agent(container_of(work, struct sbp2_lu, protocol_work), SBP2_ORB_POINTER_OFFSET, data, 8); |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 471 | } |
| 472 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 473 | static void sbp2util_write_doorbell(struct work_struct *work) |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 474 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 475 | sbp2util_notify_fetch_agent(container_of(work, struct sbp2_lu, protocol_work), SBP2_DOORBELL_OFFSET, NULL, 4); |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 476 | } |
| 477 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 478 | static int sbp2util_create_command_orb_pool(struct sbp2_lu *lu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 480 | struct sbp2_fwhost_info *hi = lu->hi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | int i; |
| 482 | unsigned long flags, orbs; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 483 | struct sbp2_command_info *cmd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 485 | orbs = sbp2_serialize_io ? 2 : SBP2_MAX_CMDS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 487 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | for (i = 0; i < orbs; i++) { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 489 | cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC); |
| 490 | if (!cmd) { |
| 491 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 492 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | } |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 494 | cmd->command_orb_dma = pci_map_single(hi->host->pdev, |
| 495 | &cmd->command_orb, |
| 496 | sizeof(struct sbp2_command_orb), |
| 497 | PCI_DMA_TODEVICE); |
| 498 | cmd->sge_dma = pci_map_single(hi->host->pdev, |
| 499 | &cmd->scatter_gather_element, |
| 500 | sizeof(cmd->scatter_gather_element), |
| 501 | PCI_DMA_BIDIRECTIONAL); |
| 502 | INIT_LIST_HEAD(&cmd->list); |
| 503 | list_add_tail(&cmd->list, &lu->cmd_orb_completed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | } |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 505 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | return 0; |
| 507 | } |
| 508 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 509 | static void sbp2util_remove_command_orb_pool(struct sbp2_lu *lu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 511 | struct hpsb_host *host = lu->hi->host; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | struct list_head *lh, *next; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 513 | struct sbp2_command_info *cmd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | unsigned long flags; |
| 515 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 516 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
| 517 | if (!list_empty(&lu->cmd_orb_completed)) |
| 518 | list_for_each_safe(lh, next, &lu->cmd_orb_completed) { |
| 519 | cmd = list_entry(lh, struct sbp2_command_info, list); |
| 520 | pci_unmap_single(host->pdev, cmd->command_orb_dma, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | sizeof(struct sbp2_command_orb), |
Stefan Richter | d4018d7 | 2006-07-23 22:57:00 +0200 | [diff] [blame] | 522 | PCI_DMA_TODEVICE); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 523 | pci_unmap_single(host->pdev, cmd->sge_dma, |
| 524 | sizeof(cmd->scatter_gather_element), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | PCI_DMA_BIDIRECTIONAL); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 526 | kfree(cmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | } |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 528 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | return; |
| 530 | } |
| 531 | |
| 532 | /* |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 533 | * Finds the sbp2_command for a given outstanding command ORB. |
| 534 | * Only looks at the in-use list. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | */ |
| 536 | static struct sbp2_command_info *sbp2util_find_command_for_orb( |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 537 | struct sbp2_lu *lu, dma_addr_t orb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 539 | struct sbp2_command_info *cmd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | unsigned long flags; |
| 541 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 542 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
| 543 | if (!list_empty(&lu->cmd_orb_inuse)) |
| 544 | list_for_each_entry(cmd, &lu->cmd_orb_inuse, list) |
| 545 | if (cmd->command_orb_dma == orb) { |
| 546 | spin_unlock_irqrestore( |
| 547 | &lu->cmd_orb_lock, flags); |
| 548 | return cmd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | } |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 550 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 551 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | } |
| 553 | |
| 554 | /* |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 555 | * Finds the sbp2_command for a given outstanding SCpnt. |
| 556 | * Only looks at the in-use list. |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 557 | * Must be called with lu->cmd_orb_lock held. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | */ |
Stefan Richter | 24c7cd0 | 2006-04-01 21:11:41 +0200 | [diff] [blame] | 559 | static struct sbp2_command_info *sbp2util_find_command_for_SCpnt( |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 560 | struct sbp2_lu *lu, void *SCpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 562 | struct sbp2_command_info *cmd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 564 | if (!list_empty(&lu->cmd_orb_inuse)) |
| 565 | list_for_each_entry(cmd, &lu->cmd_orb_inuse, list) |
| 566 | if (cmd->Current_SCpnt == SCpnt) |
| 567 | return cmd; |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 568 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | } |
| 570 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | static struct sbp2_command_info *sbp2util_allocate_command_orb( |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 572 | struct sbp2_lu *lu, |
| 573 | struct scsi_cmnd *Current_SCpnt, |
| 574 | void (*Current_done)(struct scsi_cmnd *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | { |
| 576 | struct list_head *lh; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 577 | struct sbp2_command_info *cmd = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | unsigned long flags; |
| 579 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 580 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
| 581 | if (!list_empty(&lu->cmd_orb_completed)) { |
| 582 | lh = lu->cmd_orb_completed.next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | list_del(lh); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 584 | cmd = list_entry(lh, struct sbp2_command_info, list); |
| 585 | cmd->Current_done = Current_done; |
| 586 | cmd->Current_SCpnt = Current_SCpnt; |
| 587 | list_add_tail(&cmd->list, &lu->cmd_orb_inuse); |
| 588 | } else |
Stefan Richter | d024ebc | 2006-03-28 20:03:55 -0500 | [diff] [blame] | 589 | SBP2_ERR("%s: no orbs available", __FUNCTION__); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 590 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
| 591 | return cmd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | } |
| 593 | |
Stefan Richter | 58272c1 | 2006-11-04 09:55:33 +0100 | [diff] [blame^] | 594 | /* |
| 595 | * Unmaps the DMAs of a command and moves the command to the completed ORB list. |
| 596 | * Must be called with lu->cmd_orb_lock held. |
| 597 | */ |
| 598 | static void sbp2util_mark_command_completed(struct sbp2_lu *lu, |
| 599 | struct sbp2_command_info *cmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | { |
Stefan Richter | 58272c1 | 2006-11-04 09:55:33 +0100 | [diff] [blame^] | 601 | struct hpsb_host *host = lu->ud->ne->host; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 603 | if (cmd->cmd_dma) { |
| 604 | if (cmd->dma_type == CMD_DMA_SINGLE) |
| 605 | pci_unmap_single(host->pdev, cmd->cmd_dma, |
| 606 | cmd->dma_size, cmd->dma_dir); |
| 607 | else if (cmd->dma_type == CMD_DMA_PAGE) |
| 608 | pci_unmap_page(host->pdev, cmd->cmd_dma, |
| 609 | cmd->dma_size, cmd->dma_dir); |
Stefan Richter | edf1fb2 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 610 | /* XXX: Check for CMD_DMA_NONE bug */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 611 | cmd->dma_type = CMD_DMA_NONE; |
| 612 | cmd->cmd_dma = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | } |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 614 | if (cmd->sge_buffer) { |
| 615 | pci_unmap_sg(host->pdev, cmd->sge_buffer, |
| 616 | cmd->dma_size, cmd->dma_dir); |
| 617 | cmd->sge_buffer = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | } |
Stefan Richter | cd641f6 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 619 | list_move_tail(&cmd->list, &lu->cmd_orb_completed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | } |
| 621 | |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 622 | /* |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 623 | * Is lu valid? Is the 1394 node still present? |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 624 | */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 625 | static inline int sbp2util_node_is_available(struct sbp2_lu *lu) |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 626 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 627 | return lu && lu->ne && !lu->ne->in_limbo; |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 628 | } |
| 629 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | /********************************************* |
| 631 | * IEEE-1394 core driver stack related section |
| 632 | *********************************************/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | |
| 634 | static int sbp2_probe(struct device *dev) |
| 635 | { |
| 636 | struct unit_directory *ud; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 637 | struct sbp2_lu *lu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | ud = container_of(dev, struct unit_directory, device); |
| 640 | |
| 641 | /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s) |
| 642 | * instead. */ |
| 643 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY) |
| 644 | return -ENODEV; |
| 645 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 646 | lu = sbp2_alloc_device(ud); |
| 647 | if (!lu) |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 648 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 650 | sbp2_parse_unit_directory(lu, ud); |
| 651 | return sbp2_start_device(lu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | } |
| 653 | |
| 654 | static int sbp2_remove(struct device *dev) |
| 655 | { |
| 656 | struct unit_directory *ud; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 657 | struct sbp2_lu *lu; |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 658 | struct scsi_device *sdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | ud = container_of(dev, struct unit_directory, device); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 661 | lu = ud->device.driver_data; |
| 662 | if (!lu) |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 663 | return 0; |
| 664 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 665 | if (lu->shost) { |
Stefan Richter | bf637ec | 2006-01-31 00:13:06 -0500 | [diff] [blame] | 666 | /* Get rid of enqueued commands if there is no chance to |
| 667 | * send them. */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 668 | if (!sbp2util_node_is_available(lu)) |
| 669 | sbp2scsi_complete_all_commands(lu, DID_NO_CONNECT); |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 670 | /* scsi_remove_device() may trigger shutdown functions of SCSI |
Stefan Richter | bf637ec | 2006-01-31 00:13:06 -0500 | [diff] [blame] | 671 | * highlevel drivers which would deadlock if blocked. */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 672 | atomic_set(&lu->state, SBP2LU_STATE_IN_SHUTDOWN); |
| 673 | scsi_unblock_requests(lu->shost); |
Stefan Richter | bf637ec | 2006-01-31 00:13:06 -0500 | [diff] [blame] | 674 | } |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 675 | sdev = lu->sdev; |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 676 | if (sdev) { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 677 | lu->sdev = NULL; |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 678 | scsi_remove_device(sdev); |
| 679 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 681 | sbp2_logout_device(lu); |
| 682 | sbp2_remove_device(lu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | |
| 684 | return 0; |
| 685 | } |
| 686 | |
| 687 | static int sbp2_update(struct unit_directory *ud) |
| 688 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 689 | struct sbp2_lu *lu = ud->device.driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 691 | if (sbp2_reconnect_device(lu)) { |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 692 | /* Reconnect has failed. Perhaps we didn't reconnect fast |
| 693 | * enough. Try a regular login, but first log out just in |
| 694 | * case of any weirdness. */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 695 | sbp2_logout_device(lu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 697 | if (sbp2_login_device(lu)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | /* Login failed too, just fail, and the backend |
| 699 | * will call our sbp2_remove for us */ |
| 700 | SBP2_ERR("Failed to reconnect to sbp2 device!"); |
| 701 | return -EBUSY; |
| 702 | } |
| 703 | } |
| 704 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 705 | sbp2_set_busy_timeout(lu); |
| 706 | sbp2_agent_reset(lu, 1); |
| 707 | sbp2_max_speed_and_size(lu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 709 | /* Complete any pending commands with busy (so they get retried) |
| 710 | * and remove them from our queue. */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 711 | sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | |
Stefan Richter | 4fc383c | 2006-08-14 18:46:00 +0200 | [diff] [blame] | 713 | /* Accept new commands unless there was another bus reset in the |
| 714 | * meantime. */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 715 | if (hpsb_node_entry_valid(lu->ne)) { |
| 716 | atomic_set(&lu->state, SBP2LU_STATE_RUNNING); |
| 717 | scsi_unblock_requests(lu->shost); |
Stefan Richter | 4fc383c | 2006-08-14 18:46:00 +0200 | [diff] [blame] | 718 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | return 0; |
| 720 | } |
| 721 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 722 | static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *ud) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | { |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 724 | struct sbp2_fwhost_info *hi; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 725 | struct Scsi_Host *shost = NULL; |
| 726 | struct sbp2_lu *lu = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 728 | lu = kzalloc(sizeof(*lu), GFP_KERNEL); |
| 729 | if (!lu) { |
| 730 | SBP2_ERR("failed to create lu"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | goto failed_alloc; |
| 732 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 734 | lu->ne = ud->ne; |
| 735 | lu->ud = ud; |
| 736 | lu->speed_code = IEEE1394_SPEED_100; |
| 737 | lu->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100]; |
| 738 | lu->status_fifo_addr = CSR1212_INVALID_ADDR_SPACE; |
| 739 | INIT_LIST_HEAD(&lu->cmd_orb_inuse); |
| 740 | INIT_LIST_HEAD(&lu->cmd_orb_completed); |
| 741 | INIT_LIST_HEAD(&lu->lu_list); |
| 742 | spin_lock_init(&lu->cmd_orb_lock); |
| 743 | atomic_set(&lu->state, SBP2LU_STATE_RUNNING); |
| 744 | INIT_WORK(&lu->protocol_work, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 746 | ud->device.driver_data = lu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | |
| 748 | hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host); |
| 749 | if (!hi) { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 750 | hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host, |
| 751 | sizeof(*hi)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | if (!hi) { |
| 753 | SBP2_ERR("failed to allocate hostinfo"); |
| 754 | goto failed_alloc; |
| 755 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | hi->host = ud->ne->host; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 757 | INIT_LIST_HEAD(&hi->logical_units); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA |
| 760 | /* Handle data movement if physical dma is not |
Stefan Richter | 5566405 | 2006-03-28 19:59:42 -0500 | [diff] [blame] | 761 | * enabled or not supported on host controller */ |
| 762 | if (!hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, |
| 763 | &sbp2_physdma_ops, |
| 764 | 0x0ULL, 0xfffffffcULL)) { |
| 765 | SBP2_ERR("failed to register lower 4GB address range"); |
| 766 | goto failed_alloc; |
| 767 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | #endif |
| 769 | } |
| 770 | |
Stefan Richter | 147830f | 2006-03-28 19:54:52 -0500 | [diff] [blame] | 771 | /* Prevent unloading of the 1394 host */ |
| 772 | if (!try_module_get(hi->host->driver->owner)) { |
| 773 | SBP2_ERR("failed to get a reference on 1394 host driver"); |
| 774 | goto failed_alloc; |
| 775 | } |
| 776 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 777 | lu->hi = hi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 779 | list_add_tail(&lu->lu_list, &hi->logical_units); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | |
Stefan Richter | 35bdddb | 2006-01-31 00:13:33 -0500 | [diff] [blame] | 781 | /* Register the status FIFO address range. We could use the same FIFO |
| 782 | * for targets at different nodes. However we need different FIFOs per |
Stefan Richter | a54c9d3 | 2006-05-15 22:09:46 +0200 | [diff] [blame] | 783 | * target in order to support multi-unit devices. |
| 784 | * The FIFO is located out of the local host controller's physical range |
| 785 | * but, if possible, within the posted write area. Status writes will |
| 786 | * then be performed as unified transactions. This slightly reduces |
| 787 | * bandwidth usage, and some Prolific based devices seem to require it. |
| 788 | */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 789 | lu->status_fifo_addr = hpsb_allocate_and_register_addrspace( |
Stefan Richter | 35bdddb | 2006-01-31 00:13:33 -0500 | [diff] [blame] | 790 | &sbp2_highlevel, ud->ne->host, &sbp2_ops, |
| 791 | sizeof(struct sbp2_status_block), sizeof(quadlet_t), |
Ben Collins | 40ae6c5 | 2006-06-12 18:13:49 -0400 | [diff] [blame] | 792 | ud->ne->host->low_addr_space, CSR1212_ALL_SPACE_END); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 793 | if (lu->status_fifo_addr == CSR1212_INVALID_ADDR_SPACE) { |
Stefan Richter | 35bdddb | 2006-01-31 00:13:33 -0500 | [diff] [blame] | 794 | SBP2_ERR("failed to allocate status FIFO address range"); |
| 795 | goto failed_alloc; |
| 796 | } |
| 797 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 798 | shost = scsi_host_alloc(&sbp2_shost_template, sizeof(unsigned long)); |
| 799 | if (!shost) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | SBP2_ERR("failed to register scsi host"); |
| 801 | goto failed_alloc; |
| 802 | } |
| 803 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 804 | shost->hostdata[0] = (unsigned long)lu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 806 | if (!scsi_add_host(shost, &ud->device)) { |
| 807 | lu->shost = shost; |
| 808 | return lu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | } |
| 810 | |
| 811 | SBP2_ERR("failed to add scsi host"); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 812 | scsi_host_put(shost); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | |
| 814 | failed_alloc: |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 815 | sbp2_remove_device(lu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | return NULL; |
| 817 | } |
| 818 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | static void sbp2_host_reset(struct hpsb_host *host) |
| 820 | { |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 821 | struct sbp2_fwhost_info *hi; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 822 | struct sbp2_lu *lu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | |
| 824 | hi = hpsb_get_hostinfo(&sbp2_highlevel, host); |
Stefan Richter | 2cccbb5 | 2006-08-14 18:59:00 +0200 | [diff] [blame] | 825 | if (!hi) |
| 826 | return; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 827 | list_for_each_entry(lu, &hi->logical_units, lu_list) |
| 828 | if (likely(atomic_read(&lu->state) != |
Stefan Richter | 2cccbb5 | 2006-08-14 18:59:00 +0200 | [diff] [blame] | 829 | SBP2LU_STATE_IN_SHUTDOWN)) { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 830 | atomic_set(&lu->state, SBP2LU_STATE_IN_RESET); |
| 831 | scsi_block_requests(lu->shost); |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 832 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 833 | } |
| 834 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 835 | static int sbp2_start_device(struct sbp2_lu *lu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 836 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 837 | struct sbp2_fwhost_info *hi = lu->hi; |
James Bottomley | 146f726 | 2005-09-10 12:44:09 -0500 | [diff] [blame] | 838 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 840 | lu->login_response = pci_alloc_consistent(hi->host->pdev, |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 841 | sizeof(struct sbp2_login_response), |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 842 | &lu->login_response_dma); |
| 843 | if (!lu->login_response) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 844 | goto alloc_fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 845 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 846 | lu->query_logins_orb = pci_alloc_consistent(hi->host->pdev, |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 847 | sizeof(struct sbp2_query_logins_orb), |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 848 | &lu->query_logins_orb_dma); |
| 849 | if (!lu->query_logins_orb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | goto alloc_fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 852 | lu->query_logins_response = pci_alloc_consistent(hi->host->pdev, |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 853 | sizeof(struct sbp2_query_logins_response), |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 854 | &lu->query_logins_response_dma); |
| 855 | if (!lu->query_logins_response) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | goto alloc_fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 858 | lu->reconnect_orb = pci_alloc_consistent(hi->host->pdev, |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 859 | sizeof(struct sbp2_reconnect_orb), |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 860 | &lu->reconnect_orb_dma); |
| 861 | if (!lu->reconnect_orb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | goto alloc_fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 863 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 864 | lu->logout_orb = pci_alloc_consistent(hi->host->pdev, |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 865 | sizeof(struct sbp2_logout_orb), |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 866 | &lu->logout_orb_dma); |
| 867 | if (!lu->logout_orb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | goto alloc_fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 870 | lu->login_orb = pci_alloc_consistent(hi->host->pdev, |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 871 | sizeof(struct sbp2_login_orb), |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 872 | &lu->login_orb_dma); |
| 873 | if (!lu->login_orb) |
Stefan Richter | eaceec7 | 2005-12-13 11:05:05 -0500 | [diff] [blame] | 874 | goto alloc_fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 876 | if (sbp2util_create_command_orb_pool(lu)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | SBP2_ERR("sbp2util_create_command_orb_pool failed!"); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 878 | sbp2_remove_device(lu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | return -ENOMEM; |
| 880 | } |
| 881 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 882 | /* Wait a second before trying to log in. Previously logged in |
| 883 | * initiators need a chance to reconnect. */ |
Stefan Richter | 902abed | 2006-08-14 18:56:00 +0200 | [diff] [blame] | 884 | if (msleep_interruptible(1000)) { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 885 | sbp2_remove_device(lu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | return -EINTR; |
| 887 | } |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 888 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 889 | if (sbp2_login_device(lu)) { |
| 890 | sbp2_remove_device(lu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | return -EBUSY; |
| 892 | } |
| 893 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 894 | sbp2_set_busy_timeout(lu); |
| 895 | sbp2_agent_reset(lu, 1); |
| 896 | sbp2_max_speed_and_size(lu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 898 | error = scsi_add_device(lu->shost, 0, lu->ud->id, 0); |
James Bottomley | 146f726 | 2005-09-10 12:44:09 -0500 | [diff] [blame] | 899 | if (error) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | SBP2_ERR("scsi_add_device failed"); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 901 | sbp2_logout_device(lu); |
| 902 | sbp2_remove_device(lu); |
James Bottomley | 146f726 | 2005-09-10 12:44:09 -0500 | [diff] [blame] | 903 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | } |
| 905 | |
| 906 | return 0; |
Stefan Richter | eaceec7 | 2005-12-13 11:05:05 -0500 | [diff] [blame] | 907 | |
| 908 | alloc_fail: |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 909 | SBP2_ERR("Could not allocate memory for lu"); |
| 910 | sbp2_remove_device(lu); |
Stefan Richter | eaceec7 | 2005-12-13 11:05:05 -0500 | [diff] [blame] | 911 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 912 | } |
| 913 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 914 | static void sbp2_remove_device(struct sbp2_lu *lu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | { |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 916 | struct sbp2_fwhost_info *hi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 918 | if (!lu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | return; |
| 920 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 921 | hi = lu->hi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 923 | if (lu->shost) { |
| 924 | scsi_remove_host(lu->shost); |
| 925 | scsi_host_put(lu->shost); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 926 | } |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 927 | flush_scheduled_work(); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 928 | sbp2util_remove_command_orb_pool(lu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 930 | list_del(&lu->lu_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 932 | if (lu->login_response) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | pci_free_consistent(hi->host->pdev, |
| 934 | sizeof(struct sbp2_login_response), |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 935 | lu->login_response, |
| 936 | lu->login_response_dma); |
| 937 | if (lu->login_orb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | pci_free_consistent(hi->host->pdev, |
| 939 | sizeof(struct sbp2_login_orb), |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 940 | lu->login_orb, |
| 941 | lu->login_orb_dma); |
| 942 | if (lu->reconnect_orb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | pci_free_consistent(hi->host->pdev, |
| 944 | sizeof(struct sbp2_reconnect_orb), |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 945 | lu->reconnect_orb, |
| 946 | lu->reconnect_orb_dma); |
| 947 | if (lu->logout_orb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 948 | pci_free_consistent(hi->host->pdev, |
| 949 | sizeof(struct sbp2_logout_orb), |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 950 | lu->logout_orb, |
| 951 | lu->logout_orb_dma); |
| 952 | if (lu->query_logins_orb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | pci_free_consistent(hi->host->pdev, |
| 954 | sizeof(struct sbp2_query_logins_orb), |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 955 | lu->query_logins_orb, |
| 956 | lu->query_logins_orb_dma); |
| 957 | if (lu->query_logins_response) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | pci_free_consistent(hi->host->pdev, |
| 959 | sizeof(struct sbp2_query_logins_response), |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 960 | lu->query_logins_response, |
| 961 | lu->query_logins_response_dma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 963 | if (lu->status_fifo_addr != CSR1212_INVALID_ADDR_SPACE) |
Stefan Richter | 35bdddb | 2006-01-31 00:13:33 -0500 | [diff] [blame] | 964 | hpsb_unregister_addrspace(&sbp2_highlevel, hi->host, |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 965 | lu->status_fifo_addr); |
Stefan Richter | 35bdddb | 2006-01-31 00:13:33 -0500 | [diff] [blame] | 966 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 967 | lu->ud->device.driver_data = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | |
Stefan Richter | 147830f | 2006-03-28 19:54:52 -0500 | [diff] [blame] | 969 | if (hi) |
| 970 | module_put(hi->host->driver->owner); |
| 971 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 972 | kfree(lu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 973 | } |
| 974 | |
| 975 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA |
| 976 | /* |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 977 | * Deal with write requests on adapters which do not support physical DMA or |
| 978 | * have it switched off. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | */ |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 980 | static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid, |
| 981 | int destid, quadlet_t *data, u64 addr, |
| 982 | size_t length, u16 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | { |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 984 | memcpy(bus_to_virt((u32) addr), data, length); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 985 | return RCODE_COMPLETE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 986 | } |
| 987 | |
| 988 | /* |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 989 | * Deal with read requests on adapters which do not support physical DMA or |
| 990 | * have it switched off. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | */ |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 992 | static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid, |
| 993 | quadlet_t *data, u64 addr, size_t length, |
| 994 | u16 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | { |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 996 | memcpy(data, bus_to_virt((u32) addr), length); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 997 | return RCODE_COMPLETE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | } |
| 999 | #endif |
| 1000 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1001 | /************************************** |
| 1002 | * SBP-2 protocol related section |
| 1003 | **************************************/ |
| 1004 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1005 | static int sbp2_query_logins(struct sbp2_lu *lu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1007 | struct sbp2_fwhost_info *hi = lu->hi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | quadlet_t data[2]; |
| 1009 | int max_logins; |
| 1010 | int active_logins; |
| 1011 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1012 | lu->query_logins_orb->reserved1 = 0x0; |
| 1013 | lu->query_logins_orb->reserved2 = 0x0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1015 | lu->query_logins_orb->query_response_lo = lu->query_logins_response_dma; |
| 1016 | lu->query_logins_orb->query_response_hi = |
| 1017 | ORB_SET_NODE_ID(hi->host->node_id); |
| 1018 | lu->query_logins_orb->lun_misc = |
| 1019 | ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST); |
| 1020 | lu->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1); |
| 1021 | lu->query_logins_orb->lun_misc |= ORB_SET_LUN(lu->lun); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1022 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1023 | lu->query_logins_orb->reserved_resp_length = |
| 1024 | ORB_SET_QUERY_LOGINS_RESP_LENGTH( |
| 1025 | sizeof(struct sbp2_query_logins_response)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1027 | lu->query_logins_orb->status_fifo_hi = |
| 1028 | ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id); |
| 1029 | lu->query_logins_orb->status_fifo_lo = |
| 1030 | ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1032 | sbp2util_cpu_to_be32_buffer(lu->query_logins_orb, |
| 1033 | sizeof(struct sbp2_query_logins_orb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1034 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1035 | memset(lu->query_logins_response, 0, |
| 1036 | sizeof(struct sbp2_query_logins_response)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1037 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1039 | data[1] = lu->query_logins_orb_dma; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1040 | sbp2util_cpu_to_be32_buffer(data, 8); |
| 1041 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1042 | hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1044 | if (sbp2util_access_timeout(lu, 2*HZ)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1045 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1046 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | } |
| 1048 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1049 | if (lu->status_block.ORB_offset_lo != lu->query_logins_orb_dma) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1051 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | } |
| 1053 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1054 | if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) { |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1055 | SBP2_INFO("Error querying logins to SBP-2 device - failed"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1056 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | } |
| 1058 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1059 | sbp2util_cpu_to_be32_buffer(lu->query_logins_response, |
| 1060 | sizeof(struct sbp2_query_logins_response)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1062 | max_logins = RESPONSE_GET_MAX_LOGINS( |
| 1063 | lu->query_logins_response->length_max_logins); |
Ben Collins | 20f4578 | 2006-06-12 18:13:11 -0400 | [diff] [blame] | 1064 | SBP2_INFO("Maximum concurrent logins supported: %d", max_logins); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1065 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1066 | active_logins = RESPONSE_GET_ACTIVE_LOGINS( |
| 1067 | lu->query_logins_response->length_max_logins); |
Ben Collins | 20f4578 | 2006-06-12 18:13:11 -0400 | [diff] [blame] | 1068 | SBP2_INFO("Number of active logins: %d", active_logins); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1069 | |
| 1070 | if (active_logins >= max_logins) { |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1071 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | } |
| 1073 | |
| 1074 | return 0; |
| 1075 | } |
| 1076 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1077 | static int sbp2_login_device(struct sbp2_lu *lu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1078 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1079 | struct sbp2_fwhost_info *hi = lu->hi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | quadlet_t data[2]; |
| 1081 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1082 | if (!lu->login_orb) |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1083 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1084 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1085 | if (!sbp2_exclusive_login && sbp2_query_logins(lu)) { |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1086 | SBP2_INFO("Device does not support any more concurrent logins"); |
| 1087 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | } |
| 1089 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1090 | /* assume no password */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1091 | lu->login_orb->password_hi = 0; |
| 1092 | lu->login_orb->password_lo = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1094 | lu->login_orb->login_response_lo = lu->login_response_dma; |
| 1095 | lu->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id); |
| 1096 | lu->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST); |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1097 | |
| 1098 | /* one second reconnect time */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1099 | lu->login_orb->lun_misc |= ORB_SET_RECONNECT(0); |
| 1100 | lu->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(sbp2_exclusive_login); |
| 1101 | lu->login_orb->lun_misc |= ORB_SET_NOTIFY(1); |
| 1102 | lu->login_orb->lun_misc |= ORB_SET_LUN(lu->lun); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1104 | lu->login_orb->passwd_resp_lengths = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1105 | ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1106 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1107 | lu->login_orb->status_fifo_hi = |
| 1108 | ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id); |
| 1109 | lu->login_orb->status_fifo_lo = |
| 1110 | ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1112 | sbp2util_cpu_to_be32_buffer(lu->login_orb, |
| 1113 | sizeof(struct sbp2_login_orb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1115 | memset(lu->login_response, 0, sizeof(struct sbp2_login_response)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1116 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1118 | data[1] = lu->login_orb_dma; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | sbp2util_cpu_to_be32_buffer(data, 8); |
| 1120 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1121 | hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1122 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1123 | /* wait up to 20 seconds for login status */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1124 | if (sbp2util_access_timeout(lu, 20*HZ)) { |
Stefan Richter | e8398bb | 2006-07-23 22:19:00 +0200 | [diff] [blame] | 1125 | SBP2_ERR("Error logging into SBP-2 device - timed out"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1126 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | } |
| 1128 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1129 | /* make sure that the returned status matches the login ORB */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1130 | if (lu->status_block.ORB_offset_lo != lu->login_orb_dma) { |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1131 | SBP2_ERR("Error logging into SBP-2 device - timed out"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1132 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1133 | } |
| 1134 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1135 | if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) { |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1136 | SBP2_ERR("Error logging into SBP-2 device - failed"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1137 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | } |
| 1139 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1140 | sbp2util_cpu_to_be32_buffer(lu->login_response, |
| 1141 | sizeof(struct sbp2_login_response)); |
| 1142 | lu->command_block_agent_addr = |
| 1143 | ((u64)lu->login_response->command_block_agent_hi) << 32; |
| 1144 | lu->command_block_agent_addr |= |
| 1145 | ((u64)lu->login_response->command_block_agent_lo); |
| 1146 | lu->command_block_agent_addr &= 0x0000ffffffffffffULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1147 | |
| 1148 | SBP2_INFO("Logged into SBP-2 device"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1149 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1150 | } |
| 1151 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1152 | static int sbp2_logout_device(struct sbp2_lu *lu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1153 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1154 | struct sbp2_fwhost_info *hi = lu->hi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1155 | quadlet_t data[2]; |
| 1156 | int error; |
| 1157 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1158 | lu->logout_orb->reserved1 = 0x0; |
| 1159 | lu->logout_orb->reserved2 = 0x0; |
| 1160 | lu->logout_orb->reserved3 = 0x0; |
| 1161 | lu->logout_orb->reserved4 = 0x0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1163 | lu->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST); |
| 1164 | lu->logout_orb->login_ID_misc |= |
| 1165 | ORB_SET_LOGIN_ID(lu->login_response->length_login_ID); |
| 1166 | lu->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1167 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1168 | lu->logout_orb->reserved5 = 0x0; |
| 1169 | lu->logout_orb->status_fifo_hi = |
| 1170 | ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id); |
| 1171 | lu->logout_orb->status_fifo_lo = |
| 1172 | ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1173 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1174 | sbp2util_cpu_to_be32_buffer(lu->logout_orb, |
| 1175 | sizeof(struct sbp2_logout_orb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1176 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1177 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1178 | data[1] = lu->logout_orb_dma; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1179 | sbp2util_cpu_to_be32_buffer(data, 8); |
| 1180 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1181 | error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1182 | if (error) |
| 1183 | return error; |
| 1184 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1185 | /* wait up to 1 second for the device to complete logout */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1186 | if (sbp2util_access_timeout(lu, HZ)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1187 | return -EIO; |
| 1188 | |
| 1189 | SBP2_INFO("Logged out of SBP-2 device"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1190 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1191 | } |
| 1192 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1193 | static int sbp2_reconnect_device(struct sbp2_lu *lu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1194 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1195 | struct sbp2_fwhost_info *hi = lu->hi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1196 | quadlet_t data[2]; |
| 1197 | int error; |
| 1198 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1199 | lu->reconnect_orb->reserved1 = 0x0; |
| 1200 | lu->reconnect_orb->reserved2 = 0x0; |
| 1201 | lu->reconnect_orb->reserved3 = 0x0; |
| 1202 | lu->reconnect_orb->reserved4 = 0x0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1204 | lu->reconnect_orb->login_ID_misc = |
| 1205 | ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST); |
| 1206 | lu->reconnect_orb->login_ID_misc |= |
| 1207 | ORB_SET_LOGIN_ID(lu->login_response->length_login_ID); |
| 1208 | lu->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1209 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1210 | lu->reconnect_orb->reserved5 = 0x0; |
| 1211 | lu->reconnect_orb->status_fifo_hi = |
| 1212 | ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id); |
| 1213 | lu->reconnect_orb->status_fifo_lo = |
| 1214 | ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1215 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1216 | sbp2util_cpu_to_be32_buffer(lu->reconnect_orb, |
| 1217 | sizeof(struct sbp2_reconnect_orb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1219 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1220 | data[1] = lu->reconnect_orb_dma; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1221 | sbp2util_cpu_to_be32_buffer(data, 8); |
| 1222 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1223 | error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1224 | if (error) |
| 1225 | return error; |
| 1226 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1227 | /* wait up to 1 second for reconnect status */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1228 | if (sbp2util_access_timeout(lu, HZ)) { |
Stefan Richter | e8398bb | 2006-07-23 22:19:00 +0200 | [diff] [blame] | 1229 | SBP2_ERR("Error reconnecting to SBP-2 device - timed out"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1230 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1231 | } |
| 1232 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1233 | /* make sure that the returned status matches the reconnect ORB */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1234 | if (lu->status_block.ORB_offset_lo != lu->reconnect_orb_dma) { |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1235 | SBP2_ERR("Error reconnecting to SBP-2 device - timed out"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1236 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1237 | } |
| 1238 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1239 | if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) { |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1240 | SBP2_ERR("Error reconnecting to SBP-2 device - failed"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1241 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1242 | } |
| 1243 | |
Stefan Richter | 3564409 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1244 | SBP2_INFO("Reconnected to SBP-2 device"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1245 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1246 | } |
| 1247 | |
| 1248 | /* |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1249 | * Set the target node's Single Phase Retry limit. Affects the target's retry |
| 1250 | * behaviour if our node is too busy to accept requests. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1251 | */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1252 | static int sbp2_set_busy_timeout(struct sbp2_lu *lu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1253 | { |
| 1254 | quadlet_t data; |
| 1255 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1256 | data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1257 | if (hpsb_node_write(lu->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4)) |
Stefan Richter | d024ebc | 2006-03-28 20:03:55 -0500 | [diff] [blame] | 1258 | SBP2_ERR("%s error", __FUNCTION__); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1259 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1260 | } |
| 1261 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1262 | static void sbp2_parse_unit_directory(struct sbp2_lu *lu, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1263 | struct unit_directory *ud) |
| 1264 | { |
| 1265 | struct csr1212_keyval *kv; |
| 1266 | struct csr1212_dentry *dentry; |
| 1267 | u64 management_agent_addr; |
Stefan Richter | 9117c6d | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1268 | u32 unit_characteristics, firmware_revision; |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 1269 | unsigned workarounds; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1270 | int i; |
| 1271 | |
Stefan Richter | 9117c6d | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1272 | management_agent_addr = 0; |
| 1273 | unit_characteristics = 0; |
| 1274 | firmware_revision = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1275 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1276 | csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) { |
| 1277 | switch (kv->key.id) { |
| 1278 | case CSR1212_KV_ID_DEPENDENT_INFO: |
Stefan Richter | edf1fb2 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1279 | if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1280 | management_agent_addr = |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1281 | CSR1212_REGISTER_SPACE_BASE + |
| 1282 | (kv->value.csr_offset << 2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1283 | |
Stefan Richter | edf1fb2 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1284 | else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1285 | lu->lun = ORB_SET_LUN(kv->value.immediate); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1286 | break; |
| 1287 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1288 | case SBP2_UNIT_CHARACTERISTICS_KEY: |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1289 | /* FIXME: This is ignored so far. |
| 1290 | * See SBP-2 clause 7.4.8. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1291 | unit_characteristics = kv->value.immediate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1292 | break; |
| 1293 | |
| 1294 | case SBP2_FIRMWARE_REVISION_KEY: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1295 | firmware_revision = kv->value.immediate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | break; |
| 1297 | |
| 1298 | default: |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1299 | /* FIXME: Check for SBP2_DEVICE_TYPE_AND_LUN_KEY. |
| 1300 | * Its "ordered" bit has consequences for command ORB |
| 1301 | * list handling. See SBP-2 clauses 4.6, 7.4.11, 10.2 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1302 | break; |
| 1303 | } |
| 1304 | } |
| 1305 | |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 1306 | workarounds = sbp2_default_workarounds; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1307 | |
Stefan Richter | 679c0cd | 2006-05-15 22:08:09 +0200 | [diff] [blame] | 1308 | if (!(workarounds & SBP2_WORKAROUND_OVERRIDE)) |
| 1309 | for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { |
| 1310 | if (sbp2_workarounds_table[i].firmware_revision && |
| 1311 | sbp2_workarounds_table[i].firmware_revision != |
| 1312 | (firmware_revision & 0xffff00)) |
| 1313 | continue; |
| 1314 | if (sbp2_workarounds_table[i].model_id && |
| 1315 | sbp2_workarounds_table[i].model_id != ud->model_id) |
| 1316 | continue; |
| 1317 | workarounds |= sbp2_workarounds_table[i].workarounds; |
| 1318 | break; |
| 1319 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1320 | |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 1321 | if (workarounds) |
Stefan Richter | e9a1c52 | 2006-05-15 22:06:37 +0200 | [diff] [blame] | 1322 | SBP2_INFO("Workarounds for node " NODE_BUS_FMT ": 0x%x " |
| 1323 | "(firmware_revision 0x%06x, vendor_id 0x%06x," |
| 1324 | " model_id 0x%06x)", |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 1325 | NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid), |
Stefan Richter | e9a1c52 | 2006-05-15 22:06:37 +0200 | [diff] [blame] | 1326 | workarounds, firmware_revision, |
| 1327 | ud->vendor_id ? ud->vendor_id : ud->ne->vendor_id, |
| 1328 | ud->model_id); |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 1329 | |
| 1330 | /* We would need one SCSI host template for each target to adjust |
| 1331 | * max_sectors on the fly, therefore warn only. */ |
| 1332 | if (workarounds & SBP2_WORKAROUND_128K_MAX_TRANS && |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1333 | (sbp2_max_sectors * 512) > (128 * 1024)) |
Stefan Richter | 3564409 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1334 | SBP2_INFO("Node " NODE_BUS_FMT ": Bridge only supports 128KB " |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 1335 | "max transfer size. WARNING: Current max_sectors " |
| 1336 | "setting is larger than 128KB (%d sectors)", |
| 1337 | NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid), |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1338 | sbp2_max_sectors); |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 1339 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | /* If this is a logical unit directory entry, process the parent |
| 1341 | * to get the values. */ |
| 1342 | if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1343 | struct unit_directory *parent_ud = container_of( |
| 1344 | ud->device.parent, struct unit_directory, device); |
| 1345 | sbp2_parse_unit_directory(lu, parent_ud); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1346 | } else { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1347 | lu->management_agent_addr = management_agent_addr; |
| 1348 | lu->workarounds = workarounds; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1349 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN) |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1350 | lu->lun = ORB_SET_LUN(ud->lun); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1351 | } |
| 1352 | } |
| 1353 | |
Ben Collins | fd23ade | 2006-06-12 18:14:14 -0400 | [diff] [blame] | 1354 | #define SBP2_PAYLOAD_TO_BYTES(p) (1 << ((p) + 2)) |
| 1355 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1356 | /* |
| 1357 | * This function is called in order to determine the max speed and packet |
| 1358 | * size we can use in our ORBs. Note, that we (the driver and host) only |
| 1359 | * initiate the transaction. The SBP-2 device actually transfers the data |
| 1360 | * (by reading from the DMA area we tell it). This means that the SBP-2 |
| 1361 | * device decides the actual maximum data it can transfer. We just tell it |
| 1362 | * the speed that it needs to use, and the max_rec the host supports, and |
| 1363 | * it takes care of the rest. |
| 1364 | */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1365 | static int sbp2_max_speed_and_size(struct sbp2_lu *lu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1366 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1367 | struct sbp2_fwhost_info *hi = lu->hi; |
Ben Collins | fd23ade | 2006-06-12 18:14:14 -0400 | [diff] [blame] | 1368 | u8 payload; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1369 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1370 | lu->speed_code = hi->host->speed[NODEID_TO_NODE(lu->ne->nodeid)]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1371 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1372 | if (lu->speed_code > sbp2_max_speed) { |
| 1373 | lu->speed_code = sbp2_max_speed; |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1374 | SBP2_INFO("Reducing speed to %s", |
| 1375 | hpsb_speedto_str[sbp2_max_speed]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1376 | } |
| 1377 | |
| 1378 | /* Payload size is the lesser of what our speed supports and what |
| 1379 | * our host supports. */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1380 | payload = min(sbp2_speedto_max_payload[lu->speed_code], |
Ben Collins | fd23ade | 2006-06-12 18:14:14 -0400 | [diff] [blame] | 1381 | (u8) (hi->host->csr.max_rec - 1)); |
| 1382 | |
| 1383 | /* If physical DMA is off, work around limitation in ohci1394: |
| 1384 | * packet size must not exceed PAGE_SIZE */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1385 | if (lu->ne->host->low_addr_space < (1ULL << 32)) |
Ben Collins | fd23ade | 2006-06-12 18:14:14 -0400 | [diff] [blame] | 1386 | while (SBP2_PAYLOAD_TO_BYTES(payload) + 24 > PAGE_SIZE && |
| 1387 | payload) |
| 1388 | payload--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | |
Stefan Richter | 3564409 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1390 | SBP2_INFO("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]", |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1391 | NODE_BUS_ARGS(hi->host, lu->ne->nodeid), |
| 1392 | hpsb_speedto_str[lu->speed_code], |
Stefan Richter | 3564409 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1393 | SBP2_PAYLOAD_TO_BYTES(payload)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1394 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1395 | lu->max_payload_size = payload; |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1396 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1397 | } |
| 1398 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1399 | static int sbp2_agent_reset(struct sbp2_lu *lu, int wait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | { |
| 1401 | quadlet_t data; |
| 1402 | u64 addr; |
| 1403 | int retval; |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1404 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1405 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1406 | /* cancel_delayed_work(&lu->protocol_work); */ |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 1407 | if (wait) |
| 1408 | flush_scheduled_work(); |
| 1409 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1410 | data = ntohl(SBP2_AGENT_RESET_DATA); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1411 | addr = lu->command_block_agent_addr + SBP2_AGENT_RESET_OFFSET; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1412 | |
| 1413 | if (wait) |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1414 | retval = hpsb_node_write(lu->ne, addr, &data, 4); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1415 | else |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1416 | retval = sbp2util_node_write_no_wait(lu->ne, addr, &data, 4); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1417 | |
| 1418 | if (retval < 0) { |
| 1419 | SBP2_ERR("hpsb_node_write failed.\n"); |
| 1420 | return -EIO; |
| 1421 | } |
| 1422 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1423 | /* make sure that the ORB_POINTER is written on next command */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1424 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
| 1425 | lu->last_orb = NULL; |
| 1426 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1427 | |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1428 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1429 | } |
| 1430 | |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1431 | static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb, |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1432 | struct sbp2_fwhost_info *hi, |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1433 | struct sbp2_command_info *cmd, |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1434 | unsigned int scsi_use_sg, |
| 1435 | struct scatterlist *sgpnt, |
| 1436 | u32 orb_direction, |
| 1437 | enum dma_data_direction dma_dir) |
| 1438 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1439 | cmd->dma_dir = dma_dir; |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1440 | orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); |
| 1441 | orb->misc |= ORB_SET_DIRECTION(orb_direction); |
| 1442 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1443 | /* special case if only one element (and less than 64KB in size) */ |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1444 | if ((scsi_use_sg == 1) && |
| 1445 | (sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) { |
| 1446 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1447 | cmd->dma_size = sgpnt[0].length; |
| 1448 | cmd->dma_type = CMD_DMA_PAGE; |
| 1449 | cmd->cmd_dma = pci_map_page(hi->host->pdev, |
| 1450 | sgpnt[0].page, sgpnt[0].offset, |
| 1451 | cmd->dma_size, cmd->dma_dir); |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1452 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1453 | orb->data_descriptor_lo = cmd->cmd_dma; |
| 1454 | orb->misc |= ORB_SET_DATA_SIZE(cmd->dma_size); |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1455 | |
| 1456 | } else { |
| 1457 | struct sbp2_unrestricted_page_table *sg_element = |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1458 | &cmd->scatter_gather_element[0]; |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1459 | u32 sg_count, sg_len; |
| 1460 | dma_addr_t sg_addr; |
| 1461 | int i, count = pci_map_sg(hi->host->pdev, sgpnt, scsi_use_sg, |
| 1462 | dma_dir); |
| 1463 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1464 | cmd->dma_size = scsi_use_sg; |
| 1465 | cmd->sge_buffer = sgpnt; |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1466 | |
| 1467 | /* use page tables (s/g) */ |
| 1468 | orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1469 | orb->data_descriptor_lo = cmd->sge_dma; |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1470 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1471 | /* loop through and fill out our SBP-2 page tables |
| 1472 | * (and split up anything too large) */ |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1473 | for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) { |
| 1474 | sg_len = sg_dma_len(sgpnt); |
| 1475 | sg_addr = sg_dma_address(sgpnt); |
| 1476 | while (sg_len) { |
| 1477 | sg_element[sg_count].segment_base_lo = sg_addr; |
| 1478 | if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { |
| 1479 | sg_element[sg_count].length_segment_base_hi = |
| 1480 | PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); |
| 1481 | sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; |
| 1482 | sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; |
| 1483 | } else { |
| 1484 | sg_element[sg_count].length_segment_base_hi = |
| 1485 | PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); |
| 1486 | sg_len = 0; |
| 1487 | } |
| 1488 | sg_count++; |
| 1489 | } |
| 1490 | } |
| 1491 | |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1492 | orb->misc |= ORB_SET_DATA_SIZE(sg_count); |
| 1493 | |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1494 | sbp2util_cpu_to_be32_buffer(sg_element, |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1495 | (sizeof(struct sbp2_unrestricted_page_table)) * |
| 1496 | sg_count); |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1497 | } |
| 1498 | } |
| 1499 | |
| 1500 | static void sbp2_prep_command_orb_no_sg(struct sbp2_command_orb *orb, |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1501 | struct sbp2_fwhost_info *hi, |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1502 | struct sbp2_command_info *cmd, |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1503 | struct scatterlist *sgpnt, |
| 1504 | u32 orb_direction, |
| 1505 | unsigned int scsi_request_bufflen, |
| 1506 | void *scsi_request_buffer, |
| 1507 | enum dma_data_direction dma_dir) |
| 1508 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1509 | cmd->dma_dir = dma_dir; |
| 1510 | cmd->dma_size = scsi_request_bufflen; |
| 1511 | cmd->dma_type = CMD_DMA_SINGLE; |
| 1512 | cmd->cmd_dma = pci_map_single(hi->host->pdev, scsi_request_buffer, |
| 1513 | cmd->dma_size, cmd->dma_dir); |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1514 | orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); |
| 1515 | orb->misc |= ORB_SET_DIRECTION(orb_direction); |
| 1516 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1517 | /* handle case where we get a command w/o s/g enabled |
| 1518 | * (but check for transfers larger than 64K) */ |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1519 | if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) { |
| 1520 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1521 | orb->data_descriptor_lo = cmd->cmd_dma; |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1522 | orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen); |
| 1523 | |
| 1524 | } else { |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1525 | /* The buffer is too large. Turn this into page tables. */ |
| 1526 | |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1527 | struct sbp2_unrestricted_page_table *sg_element = |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1528 | &cmd->scatter_gather_element[0]; |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1529 | u32 sg_count, sg_len; |
| 1530 | dma_addr_t sg_addr; |
| 1531 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1532 | orb->data_descriptor_lo = cmd->sge_dma; |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1533 | orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); |
| 1534 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1535 | /* fill out our SBP-2 page tables; split up the large buffer */ |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1536 | sg_count = 0; |
| 1537 | sg_len = scsi_request_bufflen; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1538 | sg_addr = cmd->cmd_dma; |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1539 | while (sg_len) { |
| 1540 | sg_element[sg_count].segment_base_lo = sg_addr; |
| 1541 | if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { |
| 1542 | sg_element[sg_count].length_segment_base_hi = |
| 1543 | PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); |
| 1544 | sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; |
| 1545 | sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; |
| 1546 | } else { |
| 1547 | sg_element[sg_count].length_segment_base_hi = |
| 1548 | PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); |
| 1549 | sg_len = 0; |
| 1550 | } |
| 1551 | sg_count++; |
| 1552 | } |
| 1553 | |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1554 | orb->misc |= ORB_SET_DATA_SIZE(sg_count); |
| 1555 | |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1556 | sbp2util_cpu_to_be32_buffer(sg_element, |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1557 | (sizeof(struct sbp2_unrestricted_page_table)) * |
| 1558 | sg_count); |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1559 | } |
| 1560 | } |
| 1561 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1562 | static void sbp2_create_command_orb(struct sbp2_lu *lu, |
| 1563 | struct sbp2_command_info *cmd, |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1564 | unchar *scsi_cmd, |
| 1565 | unsigned int scsi_use_sg, |
| 1566 | unsigned int scsi_request_bufflen, |
| 1567 | void *scsi_request_buffer, |
| 1568 | enum dma_data_direction dma_dir) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1569 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1570 | struct sbp2_fwhost_info *hi = lu->hi; |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1571 | struct scatterlist *sgpnt = (struct scatterlist *)scsi_request_buffer; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1572 | struct sbp2_command_orb *orb = &cmd->command_orb; |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1573 | u32 orb_direction; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1574 | |
| 1575 | /* |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1576 | * Set-up our command ORB. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1577 | * |
| 1578 | * NOTE: We're doing unrestricted page tables (s/g), as this is |
| 1579 | * best performance (at least with the devices I have). This means |
| 1580 | * that data_size becomes the number of s/g elements, and |
| 1581 | * page_size should be zero (for unrestricted). |
| 1582 | */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1583 | orb->next_ORB_hi = ORB_SET_NULL_PTR(1); |
| 1584 | orb->next_ORB_lo = 0x0; |
| 1585 | orb->misc = ORB_SET_MAX_PAYLOAD(lu->max_payload_size); |
| 1586 | orb->misc |= ORB_SET_SPEED(lu->speed_code); |
| 1587 | orb->misc |= ORB_SET_NOTIFY(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1588 | |
Stefan Richter | 43863eb | 2005-12-12 23:03:24 -0500 | [diff] [blame] | 1589 | if (dma_dir == DMA_NONE) |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1590 | orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; |
Stefan Richter | 43863eb | 2005-12-12 23:03:24 -0500 | [diff] [blame] | 1591 | else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen) |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1592 | orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA; |
Stefan Richter | 43863eb | 2005-12-12 23:03:24 -0500 | [diff] [blame] | 1593 | else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen) |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1594 | orb_direction = ORB_DIRECTION_READ_FROM_MEDIA; |
Stefan Richter | 43863eb | 2005-12-12 23:03:24 -0500 | [diff] [blame] | 1595 | else { |
Stefan Richter | 3564409 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1596 | SBP2_INFO("Falling back to DMA_NONE"); |
Stefan Richter | 43863eb | 2005-12-12 23:03:24 -0500 | [diff] [blame] | 1597 | orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1598 | } |
| 1599 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1600 | /* set up our page table stuff */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1601 | if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1602 | orb->data_descriptor_hi = 0x0; |
| 1603 | orb->data_descriptor_lo = 0x0; |
| 1604 | orb->misc |= ORB_SET_DIRECTION(1); |
Stefan Richter | edf1fb2 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1605 | } else if (scsi_use_sg) |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1606 | sbp2_prep_command_orb_sg(orb, hi, cmd, scsi_use_sg, sgpnt, |
| 1607 | orb_direction, dma_dir); |
Stefan Richter | edf1fb2 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1608 | else |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1609 | sbp2_prep_command_orb_no_sg(orb, hi, cmd, sgpnt, orb_direction, |
| 1610 | scsi_request_bufflen, |
Stefan Richter | cf8d2c0 | 2005-12-13 11:05:03 -0500 | [diff] [blame] | 1611 | scsi_request_buffer, dma_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1612 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1613 | sbp2util_cpu_to_be32_buffer(orb, sizeof(*orb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1614 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1615 | memset(orb->cdb, 0, 12); |
| 1616 | memcpy(orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1617 | } |
| 1618 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1619 | static void sbp2_link_orb_command(struct sbp2_lu *lu, |
| 1620 | struct sbp2_command_info *cmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1621 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1622 | struct sbp2_fwhost_info *hi = lu->hi; |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1623 | struct sbp2_command_orb *last_orb; |
| 1624 | dma_addr_t last_orb_dma; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1625 | u64 addr = lu->command_block_agent_addr; |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1626 | quadlet_t data[2]; |
| 1627 | size_t length; |
| 1628 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1629 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1630 | pci_dma_sync_single_for_device(hi->host->pdev, cmd->command_orb_dma, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1631 | sizeof(struct sbp2_command_orb), |
Stefan Richter | d4018d7 | 2006-07-23 22:57:00 +0200 | [diff] [blame] | 1632 | PCI_DMA_TODEVICE); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1633 | pci_dma_sync_single_for_device(hi->host->pdev, cmd->sge_dma, |
| 1634 | sizeof(cmd->scatter_gather_element), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1635 | PCI_DMA_BIDIRECTIONAL); |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1636 | |
| 1637 | /* check to see if there are any previous orbs to use */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1638 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
| 1639 | last_orb = lu->last_orb; |
| 1640 | last_orb_dma = lu->last_orb_dma; |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1641 | if (!last_orb) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1642 | /* |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1643 | * last_orb == NULL means: We know that the target's fetch agent |
| 1644 | * is not active right now. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1645 | */ |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1646 | addr += SBP2_ORB_POINTER_OFFSET; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1647 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1648 | data[1] = cmd->command_orb_dma; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1649 | sbp2util_cpu_to_be32_buffer(data, 8); |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1650 | length = 8; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1651 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1652 | /* |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1653 | * last_orb != NULL means: We know that the target's fetch agent |
| 1654 | * is (very probably) not dead or in reset state right now. |
| 1655 | * We have an ORB already sent that we can append a new one to. |
| 1656 | * The target's fetch agent may or may not have read this |
| 1657 | * previous ORB yet. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1658 | */ |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1659 | pci_dma_sync_single_for_cpu(hi->host->pdev, last_orb_dma, |
| 1660 | sizeof(struct sbp2_command_orb), |
Stefan Richter | d4018d7 | 2006-07-23 22:57:00 +0200 | [diff] [blame] | 1661 | PCI_DMA_TODEVICE); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1662 | last_orb->next_ORB_lo = cpu_to_be32(cmd->command_orb_dma); |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1663 | wmb(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1664 | /* Tells hardware that this pointer is valid */ |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1665 | last_orb->next_ORB_hi = 0; |
| 1666 | pci_dma_sync_single_for_device(hi->host->pdev, last_orb_dma, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1667 | sizeof(struct sbp2_command_orb), |
Stefan Richter | d4018d7 | 2006-07-23 22:57:00 +0200 | [diff] [blame] | 1668 | PCI_DMA_TODEVICE); |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1669 | addr += SBP2_DOORBELL_OFFSET; |
| 1670 | data[0] = 0; |
| 1671 | length = 4; |
| 1672 | } |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1673 | lu->last_orb = &cmd->command_orb; |
| 1674 | lu->last_orb_dma = cmd->command_orb_dma; |
| 1675 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1676 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1677 | if (sbp2util_node_write_no_wait(lu->ne, addr, data, length)) { |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 1678 | /* |
| 1679 | * sbp2util_node_write_no_wait failed. We certainly ran out |
| 1680 | * of transaction labels, perhaps just because there were no |
| 1681 | * context switches which gave khpsbpkt a chance to collect |
| 1682 | * free tlabels. Try again in non-atomic context. If necessary, |
| 1683 | * the workqueue job will sleep to guaranteedly get a tlabel. |
| 1684 | * We do not accept new commands until the job is over. |
| 1685 | */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1686 | scsi_block_requests(lu->shost); |
| 1687 | PREPARE_WORK(&lu->protocol_work, |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 1688 | last_orb ? sbp2util_write_doorbell: |
Stefan Richter | d19c776 | 2006-12-07 22:40:33 +0100 | [diff] [blame] | 1689 | sbp2util_write_orb_pointer |
| 1690 | /* */); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1691 | schedule_work(&lu->protocol_work); |
Stefan Richter | 09ee67a | 2006-08-14 18:43:00 +0200 | [diff] [blame] | 1692 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1693 | } |
| 1694 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1695 | static int sbp2_send_command(struct sbp2_lu *lu, struct scsi_cmnd *SCpnt, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1696 | void (*done)(struct scsi_cmnd *)) |
| 1697 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1698 | unchar *scsi_cmd = (unchar *)SCpnt->cmnd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1699 | unsigned int request_bufflen = SCpnt->request_bufflen; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1700 | struct sbp2_command_info *cmd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1701 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1702 | cmd = sbp2util_allocate_command_orb(lu, SCpnt, done); |
| 1703 | if (!cmd) |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1704 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1705 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1706 | sbp2_create_command_orb(lu, cmd, scsi_cmd, SCpnt->use_sg, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1707 | request_bufflen, SCpnt->request_buffer, |
| 1708 | SCpnt->sc_data_direction); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1709 | sbp2_link_orb_command(lu, cmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1710 | |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1711 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1712 | } |
| 1713 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1714 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1715 | * Translates SBP-2 status into SCSI sense data for check conditions |
| 1716 | */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1717 | static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, |
| 1718 | unchar *sense_data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1719 | { |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1720 | /* OK, it's pretty ugly... ;-) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1721 | sense_data[0] = 0x70; |
| 1722 | sense_data[1] = 0x0; |
| 1723 | sense_data[2] = sbp2_status[9]; |
| 1724 | sense_data[3] = sbp2_status[12]; |
| 1725 | sense_data[4] = sbp2_status[13]; |
| 1726 | sense_data[5] = sbp2_status[14]; |
| 1727 | sense_data[6] = sbp2_status[15]; |
| 1728 | sense_data[7] = 10; |
| 1729 | sense_data[8] = sbp2_status[16]; |
| 1730 | sense_data[9] = sbp2_status[17]; |
| 1731 | sense_data[10] = sbp2_status[18]; |
| 1732 | sense_data[11] = sbp2_status[19]; |
| 1733 | sense_data[12] = sbp2_status[10]; |
| 1734 | sense_data[13] = sbp2_status[11]; |
| 1735 | sense_data[14] = sbp2_status[20]; |
| 1736 | sense_data[15] = sbp2_status[21]; |
| 1737 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1738 | return sbp2_status[8] & 0x3f; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1739 | } |
| 1740 | |
Stefan Richter | 3e98eab4 | 2006-07-23 22:16:00 +0200 | [diff] [blame] | 1741 | static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, |
| 1742 | int destid, quadlet_t *data, u64 addr, |
| 1743 | size_t length, u16 fl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1744 | { |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1745 | struct sbp2_fwhost_info *hi; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1746 | struct sbp2_lu *lu = NULL, *lu_tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1747 | struct scsi_cmnd *SCpnt = NULL; |
Stefan Richter | 3e98eab4 | 2006-07-23 22:16:00 +0200 | [diff] [blame] | 1748 | struct sbp2_status_block *sb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1749 | u32 scsi_status = SBP2_SCSI_STATUS_GOOD; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1750 | struct sbp2_command_info *cmd; |
Jody McIntyre | 7945619 | 2005-11-07 06:29:39 -0500 | [diff] [blame] | 1751 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1752 | |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1753 | if (unlikely(length < 8 || length > sizeof(struct sbp2_status_block))) { |
| 1754 | SBP2_ERR("Wrong size of status block"); |
| 1755 | return RCODE_ADDRESS_ERROR; |
| 1756 | } |
| 1757 | if (unlikely(!host)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1758 | SBP2_ERR("host is NULL - this is bad!"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1759 | return RCODE_ADDRESS_ERROR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1760 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1761 | hi = hpsb_get_hostinfo(&sbp2_highlevel, host); |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1762 | if (unlikely(!hi)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1763 | SBP2_ERR("host info is NULL - this is bad!"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1764 | return RCODE_ADDRESS_ERROR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1765 | } |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1766 | |
| 1767 | /* Find the unit which wrote the status. */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1768 | list_for_each_entry(lu_tmp, &hi->logical_units, lu_list) { |
| 1769 | if (lu_tmp->ne->nodeid == nodeid && |
| 1770 | lu_tmp->status_fifo_addr == addr) { |
| 1771 | lu = lu_tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1772 | break; |
| 1773 | } |
| 1774 | } |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1775 | if (unlikely(!lu)) { |
| 1776 | SBP2_ERR("lu is NULL - device is gone?"); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1777 | return RCODE_ADDRESS_ERROR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1778 | } |
| 1779 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1780 | /* Put response into lu status fifo buffer. The first two bytes |
Stefan Richter | 3e98eab4 | 2006-07-23 22:16:00 +0200 | [diff] [blame] | 1781 | * come in big endian bit order. Often the target writes only a |
| 1782 | * truncated status block, minimally the first two quadlets. The rest |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1783 | * is implied to be zeros. */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1784 | sb = &lu->status_block; |
Stefan Richter | 3e98eab4 | 2006-07-23 22:16:00 +0200 | [diff] [blame] | 1785 | memset(sb->command_set_dependent, 0, sizeof(sb->command_set_dependent)); |
| 1786 | memcpy(sb, data, length); |
| 1787 | sbp2util_be32_to_cpu_buffer(sb, 8); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1788 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1789 | /* Ignore unsolicited status. Handle command ORB status. */ |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1790 | if (unlikely(STATUS_GET_SRC(sb->ORB_offset_hi_misc) == 2)) |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1791 | cmd = NULL; |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1792 | else |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1793 | cmd = sbp2util_find_command_for_orb(lu, sb->ORB_offset_lo); |
| 1794 | if (cmd) { |
| 1795 | pci_dma_sync_single_for_cpu(hi->host->pdev, |
| 1796 | cmd->command_orb_dma, |
| 1797 | sizeof(struct sbp2_command_orb), |
| 1798 | PCI_DMA_TODEVICE); |
| 1799 | pci_dma_sync_single_for_cpu(hi->host->pdev, |
| 1800 | cmd->sge_dma, |
| 1801 | sizeof(cmd->scatter_gather_element), |
| 1802 | PCI_DMA_BIDIRECTIONAL); |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1803 | /* Grab SCSI command pointers and check status. */ |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1804 | /* |
| 1805 | * FIXME: If the src field in the status is 1, the ORB DMA must |
| 1806 | * not be reused until status for a subsequent ORB is received. |
| 1807 | */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1808 | SCpnt = cmd->Current_SCpnt; |
| 1809 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
| 1810 | sbp2util_mark_command_completed(lu, cmd); |
| 1811 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1812 | |
| 1813 | if (SCpnt) { |
Stefan Richter | abbca10 | 2006-08-14 18:51:00 +0200 | [diff] [blame] | 1814 | u32 h = sb->ORB_offset_hi_misc; |
| 1815 | u32 r = STATUS_GET_RESP(h); |
| 1816 | |
| 1817 | if (r != RESP_STATUS_REQUEST_COMPLETE) { |
Stefan Richter | 3564409 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1818 | SBP2_INFO("resp 0x%x, sbp_status 0x%x", |
Stefan Richter | abbca10 | 2006-08-14 18:51:00 +0200 | [diff] [blame] | 1819 | r, STATUS_GET_SBP_STATUS(h)); |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1820 | scsi_status = |
Stefan Richter | abbca10 | 2006-08-14 18:51:00 +0200 | [diff] [blame] | 1821 | r == RESP_STATUS_TRANSPORT_FAILURE ? |
| 1822 | SBP2_SCSI_STATUS_BUSY : |
Stefan Richter | 6065772 | 2006-07-23 22:18:00 +0200 | [diff] [blame] | 1823 | SBP2_SCSI_STATUS_COMMAND_TERMINATED; |
Stefan Richter | abbca10 | 2006-08-14 18:51:00 +0200 | [diff] [blame] | 1824 | } |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1825 | |
Stefan Richter | edf1fb2 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1826 | if (STATUS_GET_LEN(h) > 1) |
Stefan Richter | 3e98eab4 | 2006-07-23 22:16:00 +0200 | [diff] [blame] | 1827 | scsi_status = sbp2_status_to_sense_data( |
| 1828 | (unchar *)sb, SCpnt->sense_buffer); |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1829 | |
Stefan Richter | edf1fb2 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1830 | if (STATUS_TEST_DEAD(h)) |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1831 | sbp2_agent_reset(lu, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1832 | } |
| 1833 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1834 | /* Check here to see if there are no commands in-use. If there |
Stefan Richter | cc07818 | 2006-07-23 22:12:00 +0200 | [diff] [blame] | 1835 | * are none, we know that the fetch agent left the active state |
| 1836 | * _and_ that we did not reactivate it yet. Therefore clear |
| 1837 | * last_orb so that next time we write directly to the |
| 1838 | * ORB_POINTER register. That way the fetch agent does not need |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1839 | * to refetch the next_ORB. */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1840 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
| 1841 | if (list_empty(&lu->cmd_orb_inuse)) |
| 1842 | lu->last_orb = NULL; |
| 1843 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1844 | |
| 1845 | } else { |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1846 | /* It's probably status after a management request. */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1847 | if ((sb->ORB_offset_lo == lu->reconnect_orb_dma) || |
| 1848 | (sb->ORB_offset_lo == lu->login_orb_dma) || |
| 1849 | (sb->ORB_offset_lo == lu->query_logins_orb_dma) || |
| 1850 | (sb->ORB_offset_lo == lu->logout_orb_dma)) { |
| 1851 | lu->access_complete = 1; |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1852 | wake_up_interruptible(&sbp2_access_wq); |
Stefan Richter | e8398bb | 2006-07-23 22:19:00 +0200 | [diff] [blame] | 1853 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1854 | } |
| 1855 | |
Stefan Richter | edf1fb2 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1856 | if (SCpnt) |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1857 | sbp2scsi_complete_command(lu, scsi_status, SCpnt, |
| 1858 | cmd->Current_done); |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1859 | return RCODE_COMPLETE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1860 | } |
| 1861 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1862 | /************************************** |
| 1863 | * SCSI interface related section |
| 1864 | **************************************/ |
| 1865 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1866 | static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt, |
| 1867 | void (*done)(struct scsi_cmnd *)) |
| 1868 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1869 | struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0]; |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1870 | struct sbp2_fwhost_info *hi; |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 1871 | int result = DID_NO_CONNECT << 16; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1872 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1873 | if (unlikely(!sbp2util_node_is_available(lu))) |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 1874 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1875 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1876 | hi = lu->hi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1877 | |
Stefan Richter | 5796aa7 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1878 | if (unlikely(!hi)) { |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1879 | SBP2_ERR("sbp2_fwhost_info is NULL - this is bad!"); |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 1880 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1881 | } |
| 1882 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1883 | /* Multiple units are currently represented to the SCSI core as separate |
| 1884 | * targets, not as one target with multiple LUs. Therefore return |
| 1885 | * selection time-out to any IO directed at non-zero LUNs. */ |
Stefan Richter | 5796aa7 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1886 | if (unlikely(SCpnt->device->lun)) |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 1887 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1888 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1889 | /* handle the request sense command here (auto-request sense) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1890 | if (SCpnt->cmnd[0] == REQUEST_SENSE) { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1891 | memcpy(SCpnt->request_buffer, SCpnt->sense_buffer, |
| 1892 | SCpnt->request_bufflen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1893 | memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer)); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1894 | sbp2scsi_complete_command(lu, SBP2_SCSI_STATUS_GOOD, SCpnt, |
| 1895 | done); |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 1896 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1897 | } |
| 1898 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1899 | if (unlikely(!hpsb_node_entry_valid(lu->ne))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1900 | SBP2_ERR("Bus reset in progress - rejecting command"); |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 1901 | result = DID_BUS_BUSY << 16; |
| 1902 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1903 | } |
| 1904 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1905 | /* Bidirectional commands are not yet implemented, |
| 1906 | * and unknown transfer direction not handled. */ |
Stefan Richter | 5796aa7 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1907 | if (unlikely(SCpnt->sc_data_direction == DMA_BIDIRECTIONAL)) { |
Stefan Richter | 43863eb | 2005-12-12 23:03:24 -0500 | [diff] [blame] | 1908 | SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command"); |
| 1909 | result = DID_ERROR << 16; |
| 1910 | goto done; |
| 1911 | } |
| 1912 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1913 | if (sbp2_send_command(lu, SCpnt, done)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1914 | SBP2_ERR("Error sending SCSI command"); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1915 | sbp2scsi_complete_command(lu, |
| 1916 | SBP2_SCSI_STATUS_SELECTION_TIMEOUT, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1917 | SCpnt, done); |
| 1918 | } |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 1919 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1920 | |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 1921 | done: |
| 1922 | SCpnt->result = result; |
| 1923 | done(SCpnt); |
| 1924 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1925 | } |
| 1926 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1927 | static void sbp2scsi_complete_all_commands(struct sbp2_lu *lu, u32 status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1928 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1929 | struct sbp2_fwhost_info *hi = lu->hi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1930 | struct list_head *lh; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1931 | struct sbp2_command_info *cmd; |
Jody McIntyre | 7945619 | 2005-11-07 06:29:39 -0500 | [diff] [blame] | 1932 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1933 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1934 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
| 1935 | while (!list_empty(&lu->cmd_orb_inuse)) { |
| 1936 | lh = lu->cmd_orb_inuse.next; |
| 1937 | cmd = list_entry(lh, struct sbp2_command_info, list); |
| 1938 | pci_dma_sync_single_for_cpu(hi->host->pdev, |
| 1939 | cmd->command_orb_dma, |
| 1940 | sizeof(struct sbp2_command_orb), |
| 1941 | PCI_DMA_TODEVICE); |
| 1942 | pci_dma_sync_single_for_cpu(hi->host->pdev, cmd->sge_dma, |
| 1943 | sizeof(cmd->scatter_gather_element), |
| 1944 | PCI_DMA_BIDIRECTIONAL); |
| 1945 | sbp2util_mark_command_completed(lu, cmd); |
| 1946 | if (cmd->Current_SCpnt) { |
| 1947 | cmd->Current_SCpnt->result = status << 16; |
| 1948 | cmd->Current_done(cmd->Current_SCpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1949 | } |
| 1950 | } |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1951 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1952 | |
| 1953 | return; |
| 1954 | } |
| 1955 | |
| 1956 | /* |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1957 | * Complete a regular SCSI command. Can be called in atomic context. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1958 | */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 1959 | static void sbp2scsi_complete_command(struct sbp2_lu *lu, u32 scsi_status, |
| 1960 | struct scsi_cmnd *SCpnt, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1961 | void (*done)(struct scsi_cmnd *)) |
| 1962 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1963 | if (!SCpnt) { |
| 1964 | SBP2_ERR("SCpnt is NULL"); |
| 1965 | return; |
| 1966 | } |
| 1967 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1968 | switch (scsi_status) { |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1969 | case SBP2_SCSI_STATUS_GOOD: |
Stefan Richter | 8f0525f | 2006-03-28 20:03:45 -0500 | [diff] [blame] | 1970 | SCpnt->result = DID_OK << 16; |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1971 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1972 | |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1973 | case SBP2_SCSI_STATUS_BUSY: |
| 1974 | SBP2_ERR("SBP2_SCSI_STATUS_BUSY"); |
| 1975 | SCpnt->result = DID_BUS_BUSY << 16; |
| 1976 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1977 | |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1978 | case SBP2_SCSI_STATUS_CHECK_CONDITION: |
Stefan Richter | 8f0525f | 2006-03-28 20:03:45 -0500 | [diff] [blame] | 1979 | SCpnt->result = CHECK_CONDITION << 1 | DID_OK << 16; |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1980 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1981 | |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1982 | case SBP2_SCSI_STATUS_SELECTION_TIMEOUT: |
| 1983 | SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT"); |
| 1984 | SCpnt->result = DID_NO_CONNECT << 16; |
| 1985 | scsi_print_command(SCpnt); |
| 1986 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1987 | |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1988 | case SBP2_SCSI_STATUS_CONDITION_MET: |
| 1989 | case SBP2_SCSI_STATUS_RESERVATION_CONFLICT: |
| 1990 | case SBP2_SCSI_STATUS_COMMAND_TERMINATED: |
| 1991 | SBP2_ERR("Bad SCSI status = %x", scsi_status); |
| 1992 | SCpnt->result = DID_ERROR << 16; |
| 1993 | scsi_print_command(SCpnt); |
| 1994 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1995 | |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 1996 | default: |
| 1997 | SBP2_ERR("Unsupported SCSI status = %x", scsi_status); |
| 1998 | SCpnt->result = DID_ERROR << 16; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1999 | } |
| 2000 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2001 | /* If a bus reset is in progress and there was an error, complete |
| 2002 | * the command as busy so that it will get retried. */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2003 | if (!hpsb_node_entry_valid(lu->ne) |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 2004 | && (scsi_status != SBP2_SCSI_STATUS_GOOD)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2005 | SBP2_ERR("Completing command with busy (bus reset)"); |
| 2006 | SCpnt->result = DID_BUS_BUSY << 16; |
| 2007 | } |
| 2008 | |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2009 | /* Tell the SCSI stack that we're done with this command. */ |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 2010 | done(SCpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2011 | } |
| 2012 | |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 2013 | static int sbp2scsi_slave_alloc(struct scsi_device *sdev) |
| 2014 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2015 | struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0]; |
Stefan Richter | a80614d | 2006-02-14 22:04:19 -0500 | [diff] [blame] | 2016 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2017 | lu->sdev = sdev; |
Stefan Richter | c394f1e | 2006-08-07 20:48:00 +0200 | [diff] [blame] | 2018 | sdev->allow_restart = 1; |
Stefan Richter | a80614d | 2006-02-14 22:04:19 -0500 | [diff] [blame] | 2019 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2020 | if (lu->workarounds & SBP2_WORKAROUND_INQUIRY_36) |
Stefan Richter | a80614d | 2006-02-14 22:04:19 -0500 | [diff] [blame] | 2021 | sdev->inquiry_len = 36; |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 2022 | return 0; |
| 2023 | } |
| 2024 | |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 2025 | static int sbp2scsi_slave_configure(struct scsi_device *sdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2026 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2027 | struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0]; |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 2028 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2029 | blk_queue_dma_alignment(sdev->request_queue, (512 - 1)); |
Ben Collins | 365c786 | 2005-11-07 06:31:24 -0500 | [diff] [blame] | 2030 | sdev->use_10_for_rw = 1; |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 2031 | |
| 2032 | if (sdev->type == TYPE_DISK && |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2033 | lu->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 2034 | sdev->skip_ms_page_8 = 1; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2035 | if (lu->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) |
Stefan Richter | e9a1c52 | 2006-05-15 22:06:37 +0200 | [diff] [blame] | 2036 | sdev->fix_capacity = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2037 | return 0; |
| 2038 | } |
| 2039 | |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 2040 | static void sbp2scsi_slave_destroy(struct scsi_device *sdev) |
| 2041 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2042 | ((struct sbp2_lu *)sdev->host->hostdata[0])->sdev = NULL; |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 2043 | return; |
| 2044 | } |
| 2045 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2046 | /* |
Stefan Richter | e8ca566 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2047 | * Called by scsi stack when something has really gone wrong. |
| 2048 | * Usually called when a command has timed-out for some reason. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2049 | */ |
| 2050 | static int sbp2scsi_abort(struct scsi_cmnd *SCpnt) |
| 2051 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2052 | struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0]; |
| 2053 | struct sbp2_fwhost_info *hi = lu->hi; |
| 2054 | struct sbp2_command_info *cmd; |
Stefan Richter | 24c7cd0 | 2006-04-01 21:11:41 +0200 | [diff] [blame] | 2055 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2056 | |
Stefan Richter | 3564409 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2057 | SBP2_INFO("aborting sbp2 command"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2058 | scsi_print_command(SCpnt); |
| 2059 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2060 | if (sbp2util_node_is_available(lu)) { |
| 2061 | sbp2_agent_reset(lu, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2062 | |
Stefan Richter | 23077f1 | 2006-09-11 20:17:14 +0200 | [diff] [blame] | 2063 | /* Return a matching command structure to the free pool. */ |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2064 | spin_lock_irqsave(&lu->cmd_orb_lock, flags); |
| 2065 | cmd = sbp2util_find_command_for_SCpnt(lu, SCpnt); |
| 2066 | if (cmd) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2067 | pci_dma_sync_single_for_cpu(hi->host->pdev, |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2068 | cmd->command_orb_dma, |
| 2069 | sizeof(struct sbp2_command_orb), |
| 2070 | PCI_DMA_TODEVICE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2071 | pci_dma_sync_single_for_cpu(hi->host->pdev, |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2072 | cmd->sge_dma, |
| 2073 | sizeof(cmd->scatter_gather_element), |
| 2074 | PCI_DMA_BIDIRECTIONAL); |
| 2075 | sbp2util_mark_command_completed(lu, cmd); |
| 2076 | if (cmd->Current_SCpnt) { |
| 2077 | cmd->Current_SCpnt->result = DID_ABORT << 16; |
| 2078 | cmd->Current_done(cmd->Current_SCpnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2079 | } |
| 2080 | } |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2081 | spin_unlock_irqrestore(&lu->cmd_orb_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2082 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2083 | sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2084 | } |
| 2085 | |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 2086 | return SUCCESS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2087 | } |
| 2088 | |
| 2089 | /* |
| 2090 | * Called by scsi stack when something has really gone wrong. |
| 2091 | */ |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 2092 | static int sbp2scsi_reset(struct scsi_cmnd *SCpnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2093 | { |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2094 | struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2095 | |
Stefan Richter | 3564409 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2096 | SBP2_INFO("reset requested"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2097 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2098 | if (sbp2util_node_is_available(lu)) { |
Stefan Richter | 3564409 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2099 | SBP2_INFO("generating sbp2 fetch agent reset"); |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2100 | sbp2_agent_reset(lu, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2101 | } |
| 2102 | |
Jody McIntyre | abd559b | 2005-09-30 11:59:06 -0700 | [diff] [blame] | 2103 | return SUCCESS; |
Jeff Garzik | 94d0e7b8 | 2005-05-28 07:55:48 -0400 | [diff] [blame] | 2104 | } |
| 2105 | |
Stefan Richter | a237f35 | 2005-11-07 06:31:39 -0500 | [diff] [blame] | 2106 | static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev, |
| 2107 | struct device_attribute *attr, |
| 2108 | char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2109 | { |
| 2110 | struct scsi_device *sdev; |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2111 | struct sbp2_lu *lu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2112 | |
| 2113 | if (!(sdev = to_scsi_device(dev))) |
| 2114 | return 0; |
| 2115 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2116 | if (!(lu = (struct sbp2_lu *)sdev->host->hostdata[0])) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2117 | return 0; |
| 2118 | |
Stefan Richter | 138c8af | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2119 | return sprintf(buf, "%016Lx:%d:%d\n", (unsigned long long)lu->ne->guid, |
| 2120 | lu->ud->id, ORB_SET_LUN(lu->lun)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2121 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2122 | |
| 2123 | MODULE_AUTHOR("Ben Collins <bcollins@debian.org>"); |
| 2124 | MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver"); |
| 2125 | MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME); |
| 2126 | MODULE_LICENSE("GPL"); |
| 2127 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2128 | static int sbp2_module_init(void) |
| 2129 | { |
| 2130 | int ret; |
| 2131 | |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2132 | if (sbp2_serialize_io) { |
| 2133 | sbp2_shost_template.can_queue = 1; |
| 2134 | sbp2_shost_template.cmd_per_lun = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2135 | } |
| 2136 | |
Stefan Richter | 24d3bf8 | 2006-05-15 22:04:59 +0200 | [diff] [blame] | 2137 | if (sbp2_default_workarounds & SBP2_WORKAROUND_128K_MAX_TRANS && |
Stefan Richter | ca0c745 | 2006-11-02 21:16:08 +0100 | [diff] [blame] | 2138 | (sbp2_max_sectors * 512) > (128 * 1024)) |
| 2139 | sbp2_max_sectors = 128 * 1024 / 512; |
| 2140 | sbp2_shost_template.max_sectors = sbp2_max_sectors; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2141 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2142 | hpsb_register_highlevel(&sbp2_highlevel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2143 | ret = hpsb_register_protocol(&sbp2_driver); |
| 2144 | if (ret) { |
| 2145 | SBP2_ERR("Failed to register protocol"); |
| 2146 | hpsb_unregister_highlevel(&sbp2_highlevel); |
| 2147 | return ret; |
| 2148 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2149 | return 0; |
| 2150 | } |
| 2151 | |
| 2152 | static void __exit sbp2_module_exit(void) |
| 2153 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2154 | hpsb_unregister_protocol(&sbp2_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2155 | hpsb_unregister_highlevel(&sbp2_highlevel); |
| 2156 | } |
| 2157 | |
| 2158 | module_init(sbp2_module_init); |
| 2159 | module_exit(sbp2_module_exit); |