Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1 | /* |
| 2 | * SBP2 driver (SCSI over IEEE1394) |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 3 | * |
Kristian Høgsberg | 27a15e5 | 2007-02-06 14:49:39 -0500 | [diff] [blame] | 4 | * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net> |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software Foundation, |
| 18 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 19 | */ |
| 20 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 21 | /* |
| 22 | * The basic structure of this driver is based on the old storage driver, |
Kristian Høgsberg | 27a15e5 | 2007-02-06 14:49:39 -0500 | [diff] [blame] | 23 | * drivers/ieee1394/sbp2.c, originally written by |
| 24 | * James Goodwin <jamesg@filanet.com> |
| 25 | * with later contributions and ongoing maintenance from |
| 26 | * Ben Collins <bcollins@debian.org>, |
| 27 | * Stefan Richter <stefanr@s5r6.in-berlin.de> |
| 28 | * and many others. |
| 29 | */ |
| 30 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 31 | #include <linux/kernel.h> |
| 32 | #include <linux/module.h> |
Stefan Richter | 5cd54c9 | 2007-06-17 23:55:41 +0200 | [diff] [blame] | 33 | #include <linux/moduleparam.h> |
Stefan Richter | fe69ca3 | 2006-12-28 12:46:54 +0100 | [diff] [blame] | 34 | #include <linux/mod_devicetable.h> |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 35 | #include <linux/device.h> |
Andrew Morton | 0b5b290 | 2006-12-27 14:49:23 -0800 | [diff] [blame] | 36 | #include <linux/scatterlist.h> |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 37 | #include <linux/dma-mapping.h> |
Stefan Richter | cf47c7a | 2007-06-17 23:52:08 +0200 | [diff] [blame] | 38 | #include <linux/blkdev.h> |
Stefan Richter | e7cdf23 | 2007-07-01 13:54:57 +0200 | [diff] [blame] | 39 | #include <linux/string.h> |
Stefan Richter | 2df222b | 2007-08-13 17:48:25 +0200 | [diff] [blame] | 40 | #include <linux/stringify.h> |
Kristian Høgsberg | 1d3d52c | 2007-02-06 14:49:33 -0500 | [diff] [blame] | 41 | #include <linux/timer.h> |
Stefan Richter | df8ec24 | 2007-08-12 12:51:18 +0200 | [diff] [blame] | 42 | #include <linux/workqueue.h> |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 43 | |
| 44 | #include <scsi/scsi.h> |
| 45 | #include <scsi/scsi_cmnd.h> |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 46 | #include <scsi/scsi_device.h> |
| 47 | #include <scsi/scsi_host.h> |
| 48 | |
| 49 | #include "fw-transaction.h" |
| 50 | #include "fw-topology.h" |
| 51 | #include "fw-device.h" |
| 52 | |
Stefan Richter | 5cd54c9 | 2007-06-17 23:55:41 +0200 | [diff] [blame] | 53 | /* |
| 54 | * So far only bridges from Oxford Semiconductor are known to support |
| 55 | * concurrent logins. Depending on firmware, four or two concurrent logins |
| 56 | * are possible on OXFW911 and newer Oxsemi bridges. |
| 57 | * |
| 58 | * Concurrent logins are useful together with cluster filesystems. |
| 59 | */ |
| 60 | static int sbp2_param_exclusive_login = 1; |
| 61 | module_param_named(exclusive_login, sbp2_param_exclusive_login, bool, 0644); |
| 62 | MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device " |
| 63 | "(default = Y, use N for concurrent initiators)"); |
| 64 | |
Stefan Richter | 2df222b | 2007-08-13 17:48:25 +0200 | [diff] [blame] | 65 | /* |
| 66 | * Flags for firmware oddities |
| 67 | * |
| 68 | * - 128kB max transfer |
| 69 | * Limit transfer size. Necessary for some old bridges. |
| 70 | * |
| 71 | * - 36 byte inquiry |
| 72 | * When scsi_mod probes the device, let the inquiry command look like that |
| 73 | * from MS Windows. |
| 74 | * |
| 75 | * - skip mode page 8 |
| 76 | * Suppress sending of mode_sense for mode page 8 if the device pretends to |
| 77 | * support the SCSI Primary Block commands instead of Reduced Block Commands. |
| 78 | * |
| 79 | * - fix capacity |
| 80 | * Tell sd_mod to correct the last sector number reported by read_capacity. |
| 81 | * Avoids access beyond actual disk limits on devices with an off-by-one bug. |
| 82 | * Don't use this with devices which don't have this bug. |
| 83 | * |
| 84 | * - override internal blacklist |
| 85 | * Instead of adding to the built-in blacklist, use only the workarounds |
| 86 | * specified in the module load parameter. |
| 87 | * Useful if a blacklist entry interfered with a non-broken device. |
| 88 | */ |
| 89 | #define SBP2_WORKAROUND_128K_MAX_TRANS 0x1 |
| 90 | #define SBP2_WORKAROUND_INQUIRY_36 0x2 |
| 91 | #define SBP2_WORKAROUND_MODE_SENSE_8 0x4 |
| 92 | #define SBP2_WORKAROUND_FIX_CAPACITY 0x8 |
| 93 | #define SBP2_WORKAROUND_OVERRIDE 0x100 |
| 94 | |
| 95 | static int sbp2_param_workarounds; |
| 96 | module_param_named(workarounds, sbp2_param_workarounds, int, 0644); |
| 97 | MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0" |
| 98 | ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS) |
| 99 | ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36) |
| 100 | ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8) |
| 101 | ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY) |
| 102 | ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE) |
| 103 | ", or a combination)"); |
| 104 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 105 | /* I don't know why the SCSI stack doesn't define something like this... */ |
Kristian Høgsberg | a98e271 | 2007-05-07 20:33:34 -0400 | [diff] [blame] | 106 | typedef void (*scsi_done_fn_t)(struct scsi_cmnd *); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 107 | |
| 108 | static const char sbp2_driver_name[] = "sbp2"; |
| 109 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 110 | /* |
| 111 | * We create one struct sbp2_logical_unit per SBP-2 Logical Unit Number Entry |
| 112 | * and one struct scsi_device per sbp2_logical_unit. |
| 113 | */ |
| 114 | struct sbp2_logical_unit { |
| 115 | struct sbp2_target *tgt; |
| 116 | struct list_head link; |
| 117 | struct scsi_device *sdev; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 118 | struct fw_address_handler address_handler; |
| 119 | struct list_head orb_list; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 120 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 121 | u64 command_block_agent_address; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 122 | u16 lun; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 123 | int login_id; |
| 124 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 125 | /* |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 126 | * The generation is updated once we've logged in or reconnected |
| 127 | * to the logical unit. Thus, I/O to the device will automatically |
| 128 | * fail and get retried if it happens in a window where the device |
| 129 | * is not ready, e.g. after a bus reset but before we reconnect. |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 130 | */ |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 131 | int generation; |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 132 | int retries; |
| 133 | struct delayed_work work; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 134 | }; |
| 135 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 136 | /* |
| 137 | * We create one struct sbp2_target per IEEE 1212 Unit Directory |
| 138 | * and one struct Scsi_Host per sbp2_target. |
| 139 | */ |
| 140 | struct sbp2_target { |
| 141 | struct kref kref; |
| 142 | struct fw_unit *unit; |
| 143 | |
| 144 | u64 management_agent_address; |
| 145 | int directory_id; |
| 146 | int node_id; |
| 147 | int address_high; |
| 148 | |
| 149 | unsigned workarounds; |
| 150 | struct list_head lu_list; |
| 151 | }; |
| 152 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 153 | #define SBP2_MAX_SG_ELEMENT_LENGTH 0xf000 |
| 154 | #define SBP2_MAX_SECTORS 255 /* Max sectors supported */ |
Kristian Høgsberg | 1d3d52c | 2007-02-06 14:49:33 -0500 | [diff] [blame] | 155 | #define SBP2_ORB_TIMEOUT 2000 /* Timeout in ms */ |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 156 | |
| 157 | #define SBP2_ORB_NULL 0x80000000 |
| 158 | |
| 159 | #define SBP2_DIRECTION_TO_MEDIA 0x0 |
| 160 | #define SBP2_DIRECTION_FROM_MEDIA 0x1 |
| 161 | |
| 162 | /* Unit directory keys */ |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 163 | #define SBP2_CSR_FIRMWARE_REVISION 0x3c |
| 164 | #define SBP2_CSR_LOGICAL_UNIT_NUMBER 0x14 |
| 165 | #define SBP2_CSR_LOGICAL_UNIT_DIRECTORY 0xd4 |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 166 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 167 | /* Management orb opcodes */ |
| 168 | #define SBP2_LOGIN_REQUEST 0x0 |
| 169 | #define SBP2_QUERY_LOGINS_REQUEST 0x1 |
| 170 | #define SBP2_RECONNECT_REQUEST 0x3 |
| 171 | #define SBP2_SET_PASSWORD_REQUEST 0x4 |
| 172 | #define SBP2_LOGOUT_REQUEST 0x7 |
| 173 | #define SBP2_ABORT_TASK_REQUEST 0xb |
| 174 | #define SBP2_ABORT_TASK_SET 0xc |
| 175 | #define SBP2_LOGICAL_UNIT_RESET 0xe |
| 176 | #define SBP2_TARGET_RESET_REQUEST 0xf |
| 177 | |
| 178 | /* Offsets for command block agent registers */ |
| 179 | #define SBP2_AGENT_STATE 0x00 |
| 180 | #define SBP2_AGENT_RESET 0x04 |
| 181 | #define SBP2_ORB_POINTER 0x08 |
| 182 | #define SBP2_DOORBELL 0x10 |
| 183 | #define SBP2_UNSOLICITED_STATUS_ENABLE 0x14 |
| 184 | |
| 185 | /* Status write response codes */ |
| 186 | #define SBP2_STATUS_REQUEST_COMPLETE 0x0 |
| 187 | #define SBP2_STATUS_TRANSPORT_FAILURE 0x1 |
| 188 | #define SBP2_STATUS_ILLEGAL_REQUEST 0x2 |
| 189 | #define SBP2_STATUS_VENDOR_DEPENDENT 0x3 |
| 190 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 191 | #define STATUS_GET_ORB_HIGH(v) ((v).status & 0xffff) |
| 192 | #define STATUS_GET_SBP_STATUS(v) (((v).status >> 16) & 0xff) |
| 193 | #define STATUS_GET_LEN(v) (((v).status >> 24) & 0x07) |
| 194 | #define STATUS_GET_DEAD(v) (((v).status >> 27) & 0x01) |
| 195 | #define STATUS_GET_RESPONSE(v) (((v).status >> 28) & 0x03) |
| 196 | #define STATUS_GET_SOURCE(v) (((v).status >> 30) & 0x03) |
| 197 | #define STATUS_GET_ORB_LOW(v) ((v).orb_low) |
| 198 | #define STATUS_GET_DATA(v) ((v).data) |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 199 | |
| 200 | struct sbp2_status { |
| 201 | u32 status; |
| 202 | u32 orb_low; |
| 203 | u8 data[24]; |
| 204 | }; |
| 205 | |
| 206 | struct sbp2_pointer { |
| 207 | u32 high; |
| 208 | u32 low; |
| 209 | }; |
| 210 | |
| 211 | struct sbp2_orb { |
| 212 | struct fw_transaction t; |
Kristian Høgsberg | e57d201 | 2007-08-24 18:59:58 -0400 | [diff] [blame] | 213 | struct kref kref; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 214 | dma_addr_t request_bus; |
| 215 | int rcode; |
| 216 | struct sbp2_pointer pointer; |
Kristian Høgsberg | a98e271 | 2007-05-07 20:33:34 -0400 | [diff] [blame] | 217 | void (*callback)(struct sbp2_orb * orb, struct sbp2_status * status); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 218 | struct list_head link; |
| 219 | }; |
| 220 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 221 | #define MANAGEMENT_ORB_LUN(v) ((v)) |
| 222 | #define MANAGEMENT_ORB_FUNCTION(v) ((v) << 16) |
| 223 | #define MANAGEMENT_ORB_RECONNECT(v) ((v) << 20) |
Stefan Richter | 5cd54c9 | 2007-06-17 23:55:41 +0200 | [diff] [blame] | 224 | #define MANAGEMENT_ORB_EXCLUSIVE(v) ((v) ? 1 << 28 : 0) |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 225 | #define MANAGEMENT_ORB_REQUEST_FORMAT(v) ((v) << 29) |
| 226 | #define MANAGEMENT_ORB_NOTIFY ((1) << 31) |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 227 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 228 | #define MANAGEMENT_ORB_RESPONSE_LENGTH(v) ((v)) |
| 229 | #define MANAGEMENT_ORB_PASSWORD_LENGTH(v) ((v) << 16) |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 230 | |
| 231 | struct sbp2_management_orb { |
| 232 | struct sbp2_orb base; |
| 233 | struct { |
| 234 | struct sbp2_pointer password; |
| 235 | struct sbp2_pointer response; |
| 236 | u32 misc; |
| 237 | u32 length; |
| 238 | struct sbp2_pointer status_fifo; |
| 239 | } request; |
| 240 | __be32 response[4]; |
| 241 | dma_addr_t response_bus; |
| 242 | struct completion done; |
| 243 | struct sbp2_status status; |
| 244 | }; |
| 245 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 246 | #define LOGIN_RESPONSE_GET_LOGIN_ID(v) ((v).misc & 0xffff) |
| 247 | #define LOGIN_RESPONSE_GET_LENGTH(v) (((v).misc >> 16) & 0xffff) |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 248 | |
| 249 | struct sbp2_login_response { |
| 250 | u32 misc; |
| 251 | struct sbp2_pointer command_block_agent; |
| 252 | u32 reconnect_hold; |
| 253 | }; |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 254 | #define COMMAND_ORB_DATA_SIZE(v) ((v)) |
| 255 | #define COMMAND_ORB_PAGE_SIZE(v) ((v) << 16) |
| 256 | #define COMMAND_ORB_PAGE_TABLE_PRESENT ((1) << 19) |
| 257 | #define COMMAND_ORB_MAX_PAYLOAD(v) ((v) << 20) |
| 258 | #define COMMAND_ORB_SPEED(v) ((v) << 24) |
| 259 | #define COMMAND_ORB_DIRECTION(v) ((v) << 27) |
| 260 | #define COMMAND_ORB_REQUEST_FORMAT(v) ((v) << 29) |
| 261 | #define COMMAND_ORB_NOTIFY ((1) << 31) |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 262 | |
| 263 | struct sbp2_command_orb { |
| 264 | struct sbp2_orb base; |
| 265 | struct { |
| 266 | struct sbp2_pointer next; |
| 267 | struct sbp2_pointer data_descriptor; |
| 268 | u32 misc; |
| 269 | u8 command_block[12]; |
| 270 | } request; |
| 271 | struct scsi_cmnd *cmd; |
| 272 | scsi_done_fn_t done; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 273 | struct sbp2_logical_unit *lu; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 274 | |
Stefan Richter | 9fb2dd1 | 2007-07-01 13:55:31 +0200 | [diff] [blame] | 275 | struct sbp2_pointer page_table[SG_ALL] __attribute__((aligned(8))); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 276 | dma_addr_t page_table_bus; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 277 | }; |
| 278 | |
| 279 | /* |
| 280 | * List of devices with known bugs. |
| 281 | * |
| 282 | * The firmware_revision field, masked with 0xffff00, is the best |
| 283 | * indicator for the type of bridge chip of a device. It yields a few |
| 284 | * false positives but this did not break correctly behaving devices |
| 285 | * so far. We use ~0 as a wildcard, since the 24 bit values we get |
| 286 | * from the config rom can never match that. |
| 287 | */ |
| 288 | static const struct { |
| 289 | u32 firmware_revision; |
| 290 | u32 model; |
| 291 | unsigned workarounds; |
| 292 | } sbp2_workarounds_table[] = { |
| 293 | /* DViCO Momobay CX-1 with TSB42AA9 bridge */ { |
| 294 | .firmware_revision = 0x002800, |
| 295 | .model = 0x001010, |
| 296 | .workarounds = SBP2_WORKAROUND_INQUIRY_36 | |
| 297 | SBP2_WORKAROUND_MODE_SENSE_8, |
| 298 | }, |
| 299 | /* Initio bridges, actually only needed for some older ones */ { |
| 300 | .firmware_revision = 0x000200, |
| 301 | .model = ~0, |
| 302 | .workarounds = SBP2_WORKAROUND_INQUIRY_36, |
| 303 | }, |
| 304 | /* Symbios bridge */ { |
| 305 | .firmware_revision = 0xa0b800, |
| 306 | .model = ~0, |
| 307 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, |
| 308 | }, |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 309 | |
| 310 | /* |
| 311 | * There are iPods (2nd gen, 3rd gen) with model_id == 0, but |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 312 | * these iPods do not feature the read_capacity bug according |
| 313 | * to one report. Read_capacity behaviour as well as model_id |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 314 | * could change due to Apple-supplied firmware updates though. |
| 315 | */ |
| 316 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 317 | /* iPod 4th generation. */ { |
| 318 | .firmware_revision = 0x0a2700, |
| 319 | .model = 0x000021, |
| 320 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, |
| 321 | }, |
| 322 | /* iPod mini */ { |
| 323 | .firmware_revision = 0x0a2700, |
| 324 | .model = 0x000023, |
| 325 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, |
| 326 | }, |
| 327 | /* iPod Photo */ { |
| 328 | .firmware_revision = 0x0a2700, |
| 329 | .model = 0x00007e, |
| 330 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, |
| 331 | } |
| 332 | }; |
| 333 | |
| 334 | static void |
Kristian Høgsberg | e57d201 | 2007-08-24 18:59:58 -0400 | [diff] [blame] | 335 | free_orb(struct kref *kref) |
| 336 | { |
| 337 | struct sbp2_orb *orb = container_of(kref, struct sbp2_orb, kref); |
| 338 | |
| 339 | kfree(orb); |
| 340 | } |
| 341 | |
| 342 | static void |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 343 | sbp2_status_write(struct fw_card *card, struct fw_request *request, |
| 344 | int tcode, int destination, int source, |
| 345 | int generation, int speed, |
| 346 | unsigned long long offset, |
| 347 | void *payload, size_t length, void *callback_data) |
| 348 | { |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 349 | struct sbp2_logical_unit *lu = callback_data; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 350 | struct sbp2_orb *orb; |
| 351 | struct sbp2_status status; |
| 352 | size_t header_size; |
| 353 | unsigned long flags; |
| 354 | |
| 355 | if (tcode != TCODE_WRITE_BLOCK_REQUEST || |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 356 | length == 0 || length > sizeof(status)) { |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 357 | fw_send_response(card, request, RCODE_TYPE_ERROR); |
| 358 | return; |
| 359 | } |
| 360 | |
| 361 | header_size = min(length, 2 * sizeof(u32)); |
| 362 | fw_memcpy_from_be32(&status, payload, header_size); |
| 363 | if (length > header_size) |
| 364 | memcpy(status.data, payload + 8, length - header_size); |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 365 | if (STATUS_GET_SOURCE(status) == 2 || STATUS_GET_SOURCE(status) == 3) { |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 366 | fw_notify("non-orb related status write, not handled\n"); |
| 367 | fw_send_response(card, request, RCODE_COMPLETE); |
| 368 | return; |
| 369 | } |
| 370 | |
| 371 | /* Lookup the orb corresponding to this status write. */ |
| 372 | spin_lock_irqsave(&card->lock, flags); |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 373 | list_for_each_entry(orb, &lu->orb_list, link) { |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 374 | if (STATUS_GET_ORB_HIGH(status) == 0 && |
Kristian Høgsberg | e57d201 | 2007-08-24 18:59:58 -0400 | [diff] [blame] | 375 | STATUS_GET_ORB_LOW(status) == orb->request_bus) { |
| 376 | orb->rcode = RCODE_COMPLETE; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 377 | list_del(&orb->link); |
| 378 | break; |
| 379 | } |
| 380 | } |
| 381 | spin_unlock_irqrestore(&card->lock, flags); |
| 382 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 383 | if (&orb->link != &lu->orb_list) |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 384 | orb->callback(orb, &status); |
| 385 | else |
| 386 | fw_error("status write for unknown orb\n"); |
| 387 | |
Kristian Høgsberg | e57d201 | 2007-08-24 18:59:58 -0400 | [diff] [blame] | 388 | kref_put(&orb->kref, free_orb); |
| 389 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 390 | fw_send_response(card, request, RCODE_COMPLETE); |
| 391 | } |
| 392 | |
| 393 | static void |
| 394 | complete_transaction(struct fw_card *card, int rcode, |
| 395 | void *payload, size_t length, void *data) |
| 396 | { |
| 397 | struct sbp2_orb *orb = data; |
| 398 | unsigned long flags; |
| 399 | |
Kristian Høgsberg | e57d201 | 2007-08-24 18:59:58 -0400 | [diff] [blame] | 400 | /* |
| 401 | * This is a little tricky. We can get the status write for |
| 402 | * the orb before we get this callback. The status write |
| 403 | * handler above will assume the orb pointer transaction was |
| 404 | * successful and set the rcode to RCODE_COMPLETE for the orb. |
| 405 | * So this callback only sets the rcode if it hasn't already |
| 406 | * been set and only does the cleanup if the transaction |
| 407 | * failed and we didn't already get a status write. |
| 408 | */ |
| 409 | spin_lock_irqsave(&card->lock, flags); |
| 410 | |
| 411 | if (orb->rcode == -1) |
| 412 | orb->rcode = rcode; |
| 413 | if (orb->rcode != RCODE_COMPLETE) { |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 414 | list_del(&orb->link); |
Stefan Richter | 1b34e97 | 2007-08-25 10:40:42 +0200 | [diff] [blame] | 415 | spin_unlock_irqrestore(&card->lock, flags); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 416 | orb->callback(orb, NULL); |
Stefan Richter | 1b34e97 | 2007-08-25 10:40:42 +0200 | [diff] [blame] | 417 | } else { |
| 418 | spin_unlock_irqrestore(&card->lock, flags); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 419 | } |
Kristian Høgsberg | e57d201 | 2007-08-24 18:59:58 -0400 | [diff] [blame] | 420 | |
Kristian Høgsberg | e57d201 | 2007-08-24 18:59:58 -0400 | [diff] [blame] | 421 | kref_put(&orb->kref, free_orb); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 422 | } |
| 423 | |
| 424 | static void |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 425 | sbp2_send_orb(struct sbp2_orb *orb, struct sbp2_logical_unit *lu, |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 426 | int node_id, int generation, u64 offset) |
| 427 | { |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 428 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 429 | unsigned long flags; |
| 430 | |
| 431 | orb->pointer.high = 0; |
| 432 | orb->pointer.low = orb->request_bus; |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 433 | fw_memcpy_to_be32(&orb->pointer, &orb->pointer, sizeof(orb->pointer)); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 434 | |
| 435 | spin_lock_irqsave(&device->card->lock, flags); |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 436 | list_add_tail(&orb->link, &lu->orb_list); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 437 | spin_unlock_irqrestore(&device->card->lock, flags); |
| 438 | |
Kristian Høgsberg | e57d201 | 2007-08-24 18:59:58 -0400 | [diff] [blame] | 439 | /* Take a ref for the orb list and for the transaction callback. */ |
| 440 | kref_get(&orb->kref); |
| 441 | kref_get(&orb->kref); |
| 442 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 443 | fw_send_request(device->card, &orb->t, TCODE_WRITE_BLOCK_REQUEST, |
Stefan Richter | f139749 | 2007-06-10 21:31:36 +0200 | [diff] [blame] | 444 | node_id, generation, device->max_speed, offset, |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 445 | &orb->pointer, sizeof(orb->pointer), |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 446 | complete_transaction, orb); |
| 447 | } |
| 448 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 449 | static int sbp2_cancel_orbs(struct sbp2_logical_unit *lu) |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 450 | { |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 451 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 452 | struct sbp2_orb *orb, *next; |
| 453 | struct list_head list; |
| 454 | unsigned long flags; |
Kristian Høgsberg | 2aaad97 | 2007-03-07 12:12:47 -0500 | [diff] [blame] | 455 | int retval = -ENOENT; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 456 | |
| 457 | INIT_LIST_HEAD(&list); |
| 458 | spin_lock_irqsave(&device->card->lock, flags); |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 459 | list_splice_init(&lu->orb_list, &list); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 460 | spin_unlock_irqrestore(&device->card->lock, flags); |
| 461 | |
| 462 | list_for_each_entry_safe(orb, next, &list, link) { |
Kristian Høgsberg | 2aaad97 | 2007-03-07 12:12:47 -0500 | [diff] [blame] | 463 | retval = 0; |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 464 | if (fw_cancel_transaction(device->card, &orb->t) == 0) |
| 465 | continue; |
| 466 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 467 | orb->rcode = RCODE_CANCELLED; |
| 468 | orb->callback(orb, NULL); |
| 469 | } |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 470 | |
Kristian Høgsberg | 2aaad97 | 2007-03-07 12:12:47 -0500 | [diff] [blame] | 471 | return retval; |
Kristian Høgsberg | 1d3d52c | 2007-02-06 14:49:33 -0500 | [diff] [blame] | 472 | } |
| 473 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 474 | static void |
| 475 | complete_management_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) |
| 476 | { |
| 477 | struct sbp2_management_orb *orb = |
Jay Fenlason | 6f06148 | 2007-06-27 16:04:33 -0400 | [diff] [blame] | 478 | container_of(base_orb, struct sbp2_management_orb, base); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 479 | |
| 480 | if (status) |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 481 | memcpy(&orb->status, status, sizeof(*status)); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 482 | complete(&orb->done); |
| 483 | } |
| 484 | |
| 485 | static int |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 486 | sbp2_send_management_orb(struct sbp2_logical_unit *lu, int node_id, |
| 487 | int generation, int function, int lun_or_login_id, |
| 488 | void *response) |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 489 | { |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 490 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 491 | struct sbp2_management_orb *orb; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 492 | int retval = -ENOMEM; |
| 493 | |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 494 | orb = kzalloc(sizeof(*orb), GFP_ATOMIC); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 495 | if (orb == NULL) |
| 496 | return -ENOMEM; |
| 497 | |
Kristian Høgsberg | e57d201 | 2007-08-24 18:59:58 -0400 | [diff] [blame] | 498 | kref_init(&orb->base.kref); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 499 | orb->response_bus = |
| 500 | dma_map_single(device->card->device, &orb->response, |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 501 | sizeof(orb->response), DMA_FROM_DEVICE); |
Kristian Høgsberg | 82eff9db | 2007-02-06 14:49:40 -0500 | [diff] [blame] | 502 | if (dma_mapping_error(orb->response_bus)) |
Stefan Richter | 7aa4848 | 2007-07-02 21:04:44 +0200 | [diff] [blame] | 503 | goto fail_mapping_response; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 504 | |
| 505 | orb->request.response.high = 0; |
| 506 | orb->request.response.low = orb->response_bus; |
| 507 | |
| 508 | orb->request.misc = |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 509 | MANAGEMENT_ORB_NOTIFY | |
| 510 | MANAGEMENT_ORB_FUNCTION(function) | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 511 | MANAGEMENT_ORB_LUN(lun_or_login_id); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 512 | orb->request.length = |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 513 | MANAGEMENT_ORB_RESPONSE_LENGTH(sizeof(orb->response)); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 514 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 515 | orb->request.status_fifo.high = lu->address_handler.offset >> 32; |
| 516 | orb->request.status_fifo.low = lu->address_handler.offset; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 517 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 518 | if (function == SBP2_LOGIN_REQUEST) { |
| 519 | orb->request.misc |= |
Stefan Richter | 5cd54c9 | 2007-06-17 23:55:41 +0200 | [diff] [blame] | 520 | MANAGEMENT_ORB_EXCLUSIVE(sbp2_param_exclusive_login) | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 521 | MANAGEMENT_ORB_RECONNECT(0); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 522 | } |
| 523 | |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 524 | fw_memcpy_to_be32(&orb->request, &orb->request, sizeof(orb->request)); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 525 | |
| 526 | init_completion(&orb->done); |
| 527 | orb->base.callback = complete_management_orb; |
Kristian Høgsberg | 2aaad97 | 2007-03-07 12:12:47 -0500 | [diff] [blame] | 528 | |
Stefan Richter | 7aa4848 | 2007-07-02 21:04:44 +0200 | [diff] [blame] | 529 | orb->base.request_bus = |
| 530 | dma_map_single(device->card->device, &orb->request, |
| 531 | sizeof(orb->request), DMA_TO_DEVICE); |
| 532 | if (dma_mapping_error(orb->base.request_bus)) |
| 533 | goto fail_mapping_request; |
| 534 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 535 | sbp2_send_orb(&orb->base, lu, node_id, generation, |
| 536 | lu->tgt->management_agent_address); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 537 | |
Kristian Høgsberg | 2aaad97 | 2007-03-07 12:12:47 -0500 | [diff] [blame] | 538 | wait_for_completion_timeout(&orb->done, |
| 539 | msecs_to_jiffies(SBP2_ORB_TIMEOUT)); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 540 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 541 | retval = -EIO; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 542 | if (sbp2_cancel_orbs(lu) == 0) { |
Kristian Høgsberg | 2aaad97 | 2007-03-07 12:12:47 -0500 | [diff] [blame] | 543 | fw_error("orb reply timed out, rcode=0x%02x\n", |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 544 | orb->base.rcode); |
| 545 | goto out; |
| 546 | } |
| 547 | |
Kristian Høgsberg | 2aaad97 | 2007-03-07 12:12:47 -0500 | [diff] [blame] | 548 | if (orb->base.rcode != RCODE_COMPLETE) { |
| 549 | fw_error("management write failed, rcode 0x%02x\n", |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 550 | orb->base.rcode); |
| 551 | goto out; |
| 552 | } |
| 553 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 554 | if (STATUS_GET_RESPONSE(orb->status) != 0 || |
| 555 | STATUS_GET_SBP_STATUS(orb->status) != 0) { |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 556 | fw_error("error status: %d:%d\n", |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 557 | STATUS_GET_RESPONSE(orb->status), |
| 558 | STATUS_GET_SBP_STATUS(orb->status)); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 559 | goto out; |
| 560 | } |
| 561 | |
| 562 | retval = 0; |
| 563 | out: |
| 564 | dma_unmap_single(device->card->device, orb->base.request_bus, |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 565 | sizeof(orb->request), DMA_TO_DEVICE); |
Stefan Richter | 7aa4848 | 2007-07-02 21:04:44 +0200 | [diff] [blame] | 566 | fail_mapping_request: |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 567 | dma_unmap_single(device->card->device, orb->response_bus, |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 568 | sizeof(orb->response), DMA_FROM_DEVICE); |
Stefan Richter | 7aa4848 | 2007-07-02 21:04:44 +0200 | [diff] [blame] | 569 | fail_mapping_response: |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 570 | if (response) |
| 571 | fw_memcpy_from_be32(response, |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 572 | orb->response, sizeof(orb->response)); |
Kristian Høgsberg | e57d201 | 2007-08-24 18:59:58 -0400 | [diff] [blame] | 573 | kref_put(&orb->base.kref, free_orb); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 574 | |
| 575 | return retval; |
| 576 | } |
| 577 | |
| 578 | static void |
| 579 | complete_agent_reset_write(struct fw_card *card, int rcode, |
| 580 | void *payload, size_t length, void *data) |
| 581 | { |
| 582 | struct fw_transaction *t = data; |
| 583 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 584 | kfree(t); |
| 585 | } |
| 586 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 587 | static int sbp2_agent_reset(struct sbp2_logical_unit *lu) |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 588 | { |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 589 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 590 | struct fw_transaction *t; |
| 591 | static u32 zero; |
| 592 | |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 593 | t = kzalloc(sizeof(*t), GFP_ATOMIC); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 594 | if (t == NULL) |
| 595 | return -ENOMEM; |
| 596 | |
| 597 | fw_send_request(device->card, t, TCODE_WRITE_QUADLET_REQUEST, |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 598 | lu->tgt->node_id, lu->generation, device->max_speed, |
| 599 | lu->command_block_agent_address + SBP2_AGENT_RESET, |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 600 | &zero, sizeof(zero), complete_agent_reset_write, t); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 601 | |
| 602 | return 0; |
| 603 | } |
| 604 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 605 | static void sbp2_release_target(struct kref *kref) |
Kristian Høgsberg | b3d6e15 | 2007-03-14 17:34:58 -0400 | [diff] [blame] | 606 | { |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 607 | struct sbp2_target *tgt = container_of(kref, struct sbp2_target, kref); |
| 608 | struct sbp2_logical_unit *lu, *next; |
| 609 | struct Scsi_Host *shost = |
| 610 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); |
Kristian Høgsberg | b3d6e15 | 2007-03-14 17:34:58 -0400 | [diff] [blame] | 611 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 612 | list_for_each_entry_safe(lu, next, &tgt->lu_list, link) { |
| 613 | if (lu->sdev) |
| 614 | scsi_remove_device(lu->sdev); |
| 615 | |
| 616 | sbp2_send_management_orb(lu, tgt->node_id, lu->generation, |
| 617 | SBP2_LOGOUT_REQUEST, lu->login_id, NULL); |
| 618 | fw_core_remove_address_handler(&lu->address_handler); |
| 619 | list_del(&lu->link); |
| 620 | kfree(lu); |
| 621 | } |
| 622 | scsi_remove_host(shost); |
| 623 | fw_notify("released %s\n", tgt->unit->device.bus_id); |
| 624 | |
| 625 | put_device(&tgt->unit->device); |
| 626 | scsi_host_put(shost); |
Kristian Høgsberg | b3d6e15 | 2007-03-14 17:34:58 -0400 | [diff] [blame] | 627 | } |
| 628 | |
Stefan Richter | df8ec24 | 2007-08-12 12:51:18 +0200 | [diff] [blame] | 629 | static struct workqueue_struct *sbp2_wq; |
| 630 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 631 | static void sbp2_reconnect(struct work_struct *work); |
| 632 | |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 633 | static void sbp2_login(struct work_struct *work) |
| 634 | { |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 635 | struct sbp2_logical_unit *lu = |
| 636 | container_of(work, struct sbp2_logical_unit, work.work); |
| 637 | struct Scsi_Host *shost = |
| 638 | container_of((void *)lu->tgt, struct Scsi_Host, hostdata[0]); |
| 639 | struct scsi_device *sdev; |
| 640 | struct scsi_lun eight_bytes_lun; |
| 641 | struct fw_unit *unit = lu->tgt->unit; |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 642 | struct fw_device *device = fw_device(unit->device.parent); |
| 643 | struct sbp2_login_response response; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 644 | int generation, node_id, local_node_id; |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 645 | |
| 646 | generation = device->card->generation; |
| 647 | node_id = device->node->node_id; |
| 648 | local_node_id = device->card->local_node->node_id; |
| 649 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 650 | if (sbp2_send_management_orb(lu, node_id, generation, |
| 651 | SBP2_LOGIN_REQUEST, lu->lun, &response) < 0) { |
| 652 | if (lu->retries++ < 5) { |
Stefan Richter | 7c45d19 | 2007-11-07 01:11:56 +0100 | [diff] [blame] | 653 | if (queue_delayed_work(sbp2_wq, &lu->work, |
| 654 | DIV_ROUND_UP(HZ, 5))) |
| 655 | kref_get(&lu->tgt->kref); |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 656 | } else { |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 657 | fw_error("failed to login to %s LUN %04x\n", |
| 658 | unit->device.bus_id, lu->lun); |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 659 | } |
Stefan Richter | 7c45d19 | 2007-11-07 01:11:56 +0100 | [diff] [blame] | 660 | kref_put(&lu->tgt->kref, sbp2_release_target); |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 661 | return; |
| 662 | } |
| 663 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 664 | lu->generation = generation; |
| 665 | lu->tgt->node_id = node_id; |
| 666 | lu->tgt->address_high = local_node_id << 16; |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 667 | |
| 668 | /* Get command block agent offset and login id. */ |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 669 | lu->command_block_agent_address = |
Kristian Høgsberg | 5c5539d | 2007-03-07 12:12:45 -0500 | [diff] [blame] | 670 | ((u64) (response.command_block_agent.high & 0xffff) << 32) | |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 671 | response.command_block_agent.low; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 672 | lu->login_id = LOGIN_RESPONSE_GET_LOGIN_ID(response); |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 673 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 674 | fw_notify("logged in to %s LUN %04x (%d retries)\n", |
| 675 | unit->device.bus_id, lu->lun, lu->retries); |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 676 | |
| 677 | #if 0 |
| 678 | /* FIXME: The linux1394 sbp2 does this last step. */ |
| 679 | sbp2_set_busy_timeout(scsi_id); |
| 680 | #endif |
| 681 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 682 | PREPARE_DELAYED_WORK(&lu->work, sbp2_reconnect); |
| 683 | sbp2_agent_reset(lu); |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 684 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 685 | memset(&eight_bytes_lun, 0, sizeof(eight_bytes_lun)); |
| 686 | eight_bytes_lun.scsi_lun[0] = (lu->lun >> 8) & 0xff; |
| 687 | eight_bytes_lun.scsi_lun[1] = lu->lun & 0xff; |
| 688 | |
| 689 | sdev = __scsi_add_device(shost, 0, 0, |
| 690 | scsilun_to_int(&eight_bytes_lun), lu); |
| 691 | if (IS_ERR(sdev)) { |
| 692 | sbp2_send_management_orb(lu, node_id, generation, |
| 693 | SBP2_LOGOUT_REQUEST, lu->login_id, NULL); |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 694 | /* |
| 695 | * Set this back to sbp2_login so we fall back and |
| 696 | * retry login on bus reset. |
| 697 | */ |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 698 | PREPARE_DELAYED_WORK(&lu->work, sbp2_login); |
| 699 | } else { |
| 700 | lu->sdev = sdev; |
| 701 | scsi_device_put(sdev); |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 702 | } |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 703 | kref_put(&lu->tgt->kref, sbp2_release_target); |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 704 | } |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 705 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 706 | static int sbp2_add_logical_unit(struct sbp2_target *tgt, int lun_entry) |
| 707 | { |
| 708 | struct sbp2_logical_unit *lu; |
| 709 | |
| 710 | lu = kmalloc(sizeof(*lu), GFP_KERNEL); |
| 711 | if (!lu) |
| 712 | return -ENOMEM; |
| 713 | |
| 714 | lu->address_handler.length = 0x100; |
| 715 | lu->address_handler.address_callback = sbp2_status_write; |
| 716 | lu->address_handler.callback_data = lu; |
| 717 | |
| 718 | if (fw_core_add_address_handler(&lu->address_handler, |
| 719 | &fw_high_memory_region) < 0) { |
| 720 | kfree(lu); |
| 721 | return -ENOMEM; |
| 722 | } |
| 723 | |
| 724 | lu->tgt = tgt; |
| 725 | lu->sdev = NULL; |
| 726 | lu->lun = lun_entry & 0xffff; |
| 727 | lu->retries = 0; |
| 728 | INIT_LIST_HEAD(&lu->orb_list); |
| 729 | INIT_DELAYED_WORK(&lu->work, sbp2_login); |
| 730 | |
| 731 | list_add_tail(&lu->link, &tgt->lu_list); |
| 732 | return 0; |
| 733 | } |
| 734 | |
| 735 | static int sbp2_scan_logical_unit_dir(struct sbp2_target *tgt, u32 *directory) |
| 736 | { |
| 737 | struct fw_csr_iterator ci; |
| 738 | int key, value; |
| 739 | |
| 740 | fw_csr_iterator_init(&ci, directory); |
| 741 | while (fw_csr_iterator_next(&ci, &key, &value)) |
| 742 | if (key == SBP2_CSR_LOGICAL_UNIT_NUMBER && |
| 743 | sbp2_add_logical_unit(tgt, value) < 0) |
| 744 | return -ENOMEM; |
| 745 | return 0; |
| 746 | } |
| 747 | |
| 748 | static int sbp2_scan_unit_dir(struct sbp2_target *tgt, u32 *directory, |
| 749 | u32 *model, u32 *firmware_revision) |
| 750 | { |
| 751 | struct fw_csr_iterator ci; |
| 752 | int key, value; |
| 753 | |
| 754 | fw_csr_iterator_init(&ci, directory); |
| 755 | while (fw_csr_iterator_next(&ci, &key, &value)) { |
| 756 | switch (key) { |
| 757 | |
| 758 | case CSR_DEPENDENT_INFO | CSR_OFFSET: |
| 759 | tgt->management_agent_address = |
| 760 | CSR_REGISTER_BASE + 4 * value; |
| 761 | break; |
| 762 | |
| 763 | case CSR_DIRECTORY_ID: |
| 764 | tgt->directory_id = value; |
| 765 | break; |
| 766 | |
| 767 | case CSR_MODEL: |
| 768 | *model = value; |
| 769 | break; |
| 770 | |
| 771 | case SBP2_CSR_FIRMWARE_REVISION: |
| 772 | *firmware_revision = value; |
| 773 | break; |
| 774 | |
| 775 | case SBP2_CSR_LOGICAL_UNIT_NUMBER: |
| 776 | if (sbp2_add_logical_unit(tgt, value) < 0) |
| 777 | return -ENOMEM; |
| 778 | break; |
| 779 | |
| 780 | case SBP2_CSR_LOGICAL_UNIT_DIRECTORY: |
| 781 | if (sbp2_scan_logical_unit_dir(tgt, ci.p + value) < 0) |
| 782 | return -ENOMEM; |
| 783 | break; |
| 784 | } |
| 785 | } |
| 786 | return 0; |
| 787 | } |
| 788 | |
| 789 | static void sbp2_init_workarounds(struct sbp2_target *tgt, u32 model, |
| 790 | u32 firmware_revision) |
| 791 | { |
| 792 | int i; |
Stefan Richter | 2df222b | 2007-08-13 17:48:25 +0200 | [diff] [blame] | 793 | unsigned w = sbp2_param_workarounds; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 794 | |
Stefan Richter | 2df222b | 2007-08-13 17:48:25 +0200 | [diff] [blame] | 795 | if (w) |
| 796 | fw_notify("Please notify linux1394-devel@lists.sourceforge.net " |
| 797 | "if you need the workarounds parameter for %s\n", |
| 798 | tgt->unit->device.bus_id); |
| 799 | |
| 800 | if (w & SBP2_WORKAROUND_OVERRIDE) |
| 801 | goto out; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 802 | |
| 803 | for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { |
| 804 | |
| 805 | if (sbp2_workarounds_table[i].firmware_revision != |
| 806 | (firmware_revision & 0xffffff00)) |
| 807 | continue; |
| 808 | |
| 809 | if (sbp2_workarounds_table[i].model != model && |
| 810 | sbp2_workarounds_table[i].model != ~0) |
| 811 | continue; |
| 812 | |
Stefan Richter | 2df222b | 2007-08-13 17:48:25 +0200 | [diff] [blame] | 813 | w |= sbp2_workarounds_table[i].workarounds; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 814 | break; |
| 815 | } |
Stefan Richter | 2df222b | 2007-08-13 17:48:25 +0200 | [diff] [blame] | 816 | out: |
| 817 | if (w) |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 818 | fw_notify("Workarounds for %s: 0x%x " |
| 819 | "(firmware_revision 0x%06x, model_id 0x%06x)\n", |
| 820 | tgt->unit->device.bus_id, |
Stefan Richter | 2df222b | 2007-08-13 17:48:25 +0200 | [diff] [blame] | 821 | w, firmware_revision, model); |
| 822 | tgt->workarounds = w; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 823 | } |
| 824 | |
| 825 | static struct scsi_host_template scsi_driver_template; |
| 826 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 827 | static int sbp2_probe(struct device *dev) |
| 828 | { |
| 829 | struct fw_unit *unit = fw_unit(dev); |
| 830 | struct fw_device *device = fw_device(unit->device.parent); |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 831 | struct sbp2_target *tgt; |
| 832 | struct sbp2_logical_unit *lu; |
| 833 | struct Scsi_Host *shost; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 834 | u32 model, firmware_revision; |
| 835 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 836 | shost = scsi_host_alloc(&scsi_driver_template, sizeof(*tgt)); |
| 837 | if (shost == NULL) |
| 838 | return -ENOMEM; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 839 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 840 | tgt = (struct sbp2_target *)shost->hostdata; |
| 841 | unit->device.driver_data = tgt; |
| 842 | tgt->unit = unit; |
| 843 | kref_init(&tgt->kref); |
| 844 | INIT_LIST_HEAD(&tgt->lu_list); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 845 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 846 | if (fw_device_enable_phys_dma(device) < 0) |
| 847 | goto fail_shost_put; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 848 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 849 | if (scsi_add_host(shost, &unit->device) < 0) |
| 850 | goto fail_shost_put; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 851 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 852 | /* Initialize to values that won't match anything in our table. */ |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 853 | firmware_revision = 0xff000000; |
| 854 | model = 0xff000000; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 855 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 856 | /* implicit directory ID */ |
| 857 | tgt->directory_id = ((unit->directory - device->config_rom) * 4 |
| 858 | + CSR_CONFIG_ROM) & 0xffffff; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 859 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 860 | if (sbp2_scan_unit_dir(tgt, unit->directory, &model, |
| 861 | &firmware_revision) < 0) |
| 862 | goto fail_tgt_put; |
| 863 | |
| 864 | sbp2_init_workarounds(tgt, model, firmware_revision); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 865 | |
Kristian Høgsberg | b3d6e15 | 2007-03-14 17:34:58 -0400 | [diff] [blame] | 866 | get_device(&unit->device); |
| 867 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 868 | /* |
| 869 | * We schedule work to do the login so we can easily |
Kristian Høgsberg | b3d6e15 | 2007-03-14 17:34:58 -0400 | [diff] [blame] | 870 | * reschedule retries. Always get the ref before scheduling |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 871 | * work. |
| 872 | */ |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 873 | list_for_each_entry(lu, &tgt->lu_list, link) |
Stefan Richter | df8ec24 | 2007-08-12 12:51:18 +0200 | [diff] [blame] | 874 | if (queue_delayed_work(sbp2_wq, &lu->work, 0)) |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 875 | kref_get(&tgt->kref); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 876 | return 0; |
Kristian Høgsberg | ad85274 | 2007-05-09 19:23:07 -0400 | [diff] [blame] | 877 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 878 | fail_tgt_put: |
| 879 | kref_put(&tgt->kref, sbp2_release_target); |
| 880 | return -ENOMEM; |
| 881 | |
| 882 | fail_shost_put: |
| 883 | scsi_host_put(shost); |
| 884 | return -ENOMEM; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 885 | } |
| 886 | |
| 887 | static int sbp2_remove(struct device *dev) |
| 888 | { |
| 889 | struct fw_unit *unit = fw_unit(dev); |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 890 | struct sbp2_target *tgt = unit->device.driver_data; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 891 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 892 | kref_put(&tgt->kref, sbp2_release_target); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 893 | return 0; |
| 894 | } |
| 895 | |
| 896 | static void sbp2_reconnect(struct work_struct *work) |
| 897 | { |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 898 | struct sbp2_logical_unit *lu = |
| 899 | container_of(work, struct sbp2_logical_unit, work.work); |
| 900 | struct fw_unit *unit = lu->tgt->unit; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 901 | struct fw_device *device = fw_device(unit->device.parent); |
| 902 | int generation, node_id, local_node_id; |
| 903 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 904 | generation = device->card->generation; |
| 905 | node_id = device->node->node_id; |
| 906 | local_node_id = device->card->local_node->node_id; |
| 907 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 908 | if (sbp2_send_management_orb(lu, node_id, generation, |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 909 | SBP2_RECONNECT_REQUEST, |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 910 | lu->login_id, NULL) < 0) { |
| 911 | if (lu->retries++ >= 5) { |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 912 | fw_error("failed to reconnect to %s\n", |
| 913 | unit->device.bus_id); |
| 914 | /* Fall back and try to log in again. */ |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 915 | lu->retries = 0; |
| 916 | PREPARE_DELAYED_WORK(&lu->work, sbp2_login); |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 917 | } |
Stefan Richter | 7c45d19 | 2007-11-07 01:11:56 +0100 | [diff] [blame] | 918 | if (queue_delayed_work(sbp2_wq, &lu->work, DIV_ROUND_UP(HZ, 5))) |
| 919 | kref_get(&lu->tgt->kref); |
| 920 | kref_put(&lu->tgt->kref, sbp2_release_target); |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 921 | return; |
| 922 | } |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 923 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 924 | lu->generation = generation; |
| 925 | lu->tgt->node_id = node_id; |
| 926 | lu->tgt->address_high = local_node_id << 16; |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 927 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 928 | fw_notify("reconnected to %s LUN %04x (%d retries)\n", |
| 929 | unit->device.bus_id, lu->lun, lu->retries); |
| 930 | |
| 931 | sbp2_agent_reset(lu); |
| 932 | sbp2_cancel_orbs(lu); |
| 933 | |
| 934 | kref_put(&lu->tgt->kref, sbp2_release_target); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 935 | } |
| 936 | |
| 937 | static void sbp2_update(struct fw_unit *unit) |
| 938 | { |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 939 | struct sbp2_target *tgt = unit->device.driver_data; |
| 940 | struct sbp2_logical_unit *lu; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 941 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 942 | fw_device_enable_phys_dma(fw_device(unit->device.parent)); |
| 943 | |
| 944 | /* |
| 945 | * Fw-core serializes sbp2_update() against sbp2_remove(). |
| 946 | * Iteration over tgt->lu_list is therefore safe here. |
| 947 | */ |
| 948 | list_for_each_entry(lu, &tgt->lu_list, link) { |
| 949 | lu->retries = 0; |
Stefan Richter | df8ec24 | 2007-08-12 12:51:18 +0200 | [diff] [blame] | 950 | if (queue_delayed_work(sbp2_wq, &lu->work, 0)) |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 951 | kref_get(&tgt->kref); |
| 952 | } |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 953 | } |
| 954 | |
| 955 | #define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e |
| 956 | #define SBP2_SW_VERSION_ENTRY 0x00010483 |
| 957 | |
Stefan Richter | 21ebcd1 | 2007-01-14 15:29:07 +0100 | [diff] [blame] | 958 | static const struct fw_device_id sbp2_id_table[] = { |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 959 | { |
| 960 | .match_flags = FW_MATCH_SPECIFIER_ID | FW_MATCH_VERSION, |
| 961 | .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY, |
Stefan Richter | 5af4e5e | 2007-01-21 20:45:32 +0100 | [diff] [blame] | 962 | .version = SBP2_SW_VERSION_ENTRY, |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 963 | }, |
| 964 | { } |
| 965 | }; |
| 966 | |
| 967 | static struct fw_driver sbp2_driver = { |
| 968 | .driver = { |
| 969 | .owner = THIS_MODULE, |
| 970 | .name = sbp2_driver_name, |
| 971 | .bus = &fw_bus_type, |
| 972 | .probe = sbp2_probe, |
| 973 | .remove = sbp2_remove, |
| 974 | }, |
| 975 | .update = sbp2_update, |
| 976 | .id_table = sbp2_id_table, |
| 977 | }; |
| 978 | |
Kristian Høgsberg | fbb5423 | 2007-04-10 18:11:18 -0400 | [diff] [blame] | 979 | static unsigned int |
| 980 | sbp2_status_to_sense_data(u8 *sbp2_status, u8 *sense_data) |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 981 | { |
Kristian Høgsberg | fbb5423 | 2007-04-10 18:11:18 -0400 | [diff] [blame] | 982 | int sam_status; |
| 983 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 984 | sense_data[0] = 0x70; |
| 985 | sense_data[1] = 0x0; |
| 986 | sense_data[2] = sbp2_status[1]; |
| 987 | sense_data[3] = sbp2_status[4]; |
| 988 | sense_data[4] = sbp2_status[5]; |
| 989 | sense_data[5] = sbp2_status[6]; |
| 990 | sense_data[6] = sbp2_status[7]; |
| 991 | sense_data[7] = 10; |
| 992 | sense_data[8] = sbp2_status[8]; |
| 993 | sense_data[9] = sbp2_status[9]; |
| 994 | sense_data[10] = sbp2_status[10]; |
| 995 | sense_data[11] = sbp2_status[11]; |
| 996 | sense_data[12] = sbp2_status[2]; |
| 997 | sense_data[13] = sbp2_status[3]; |
| 998 | sense_data[14] = sbp2_status[12]; |
| 999 | sense_data[15] = sbp2_status[13]; |
| 1000 | |
Kristian Høgsberg | fbb5423 | 2007-04-10 18:11:18 -0400 | [diff] [blame] | 1001 | sam_status = sbp2_status[0] & 0x3f; |
| 1002 | |
| 1003 | switch (sam_status) { |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1004 | case SAM_STAT_GOOD: |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1005 | case SAM_STAT_CHECK_CONDITION: |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1006 | case SAM_STAT_CONDITION_MET: |
Kristian Høgsberg | fbb5423 | 2007-04-10 18:11:18 -0400 | [diff] [blame] | 1007 | case SAM_STAT_BUSY: |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1008 | case SAM_STAT_RESERVATION_CONFLICT: |
| 1009 | case SAM_STAT_COMMAND_TERMINATED: |
Kristian Høgsberg | fbb5423 | 2007-04-10 18:11:18 -0400 | [diff] [blame] | 1010 | return DID_OK << 16 | sam_status; |
| 1011 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1012 | default: |
Kristian Høgsberg | fbb5423 | 2007-04-10 18:11:18 -0400 | [diff] [blame] | 1013 | return DID_ERROR << 16; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1014 | } |
| 1015 | } |
| 1016 | |
| 1017 | static void |
| 1018 | complete_command_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) |
| 1019 | { |
Jay Fenlason | 6f06148 | 2007-06-27 16:04:33 -0400 | [diff] [blame] | 1020 | struct sbp2_command_orb *orb = |
| 1021 | container_of(base_orb, struct sbp2_command_orb, base); |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1022 | struct fw_device *device = fw_device(orb->lu->tgt->unit->device.parent); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1023 | int result; |
| 1024 | |
| 1025 | if (status != NULL) { |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 1026 | if (STATUS_GET_DEAD(*status)) |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1027 | sbp2_agent_reset(orb->lu); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1028 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 1029 | switch (STATUS_GET_RESPONSE(*status)) { |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1030 | case SBP2_STATUS_REQUEST_COMPLETE: |
Kristian Høgsberg | fbb5423 | 2007-04-10 18:11:18 -0400 | [diff] [blame] | 1031 | result = DID_OK << 16; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1032 | break; |
| 1033 | case SBP2_STATUS_TRANSPORT_FAILURE: |
Kristian Høgsberg | fbb5423 | 2007-04-10 18:11:18 -0400 | [diff] [blame] | 1034 | result = DID_BUS_BUSY << 16; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1035 | break; |
| 1036 | case SBP2_STATUS_ILLEGAL_REQUEST: |
| 1037 | case SBP2_STATUS_VENDOR_DEPENDENT: |
| 1038 | default: |
Kristian Høgsberg | fbb5423 | 2007-04-10 18:11:18 -0400 | [diff] [blame] | 1039 | result = DID_ERROR << 16; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1040 | break; |
| 1041 | } |
| 1042 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 1043 | if (result == DID_OK << 16 && STATUS_GET_LEN(*status) > 1) |
| 1044 | result = sbp2_status_to_sense_data(STATUS_GET_DATA(*status), |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1045 | orb->cmd->sense_buffer); |
| 1046 | } else { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1047 | /* |
| 1048 | * If the orb completes with status == NULL, something |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1049 | * went wrong, typically a bus reset happened mid-orb |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1050 | * or when sending the write (less likely). |
| 1051 | */ |
Kristian Høgsberg | fbb5423 | 2007-04-10 18:11:18 -0400 | [diff] [blame] | 1052 | result = DID_BUS_BUSY << 16; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1053 | } |
| 1054 | |
| 1055 | dma_unmap_single(device->card->device, orb->base.request_bus, |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 1056 | sizeof(orb->request), DMA_TO_DEVICE); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1057 | |
Stefan Richter | 412edf6 | 2007-07-16 21:05:41 +0200 | [diff] [blame] | 1058 | if (scsi_sg_count(orb->cmd) > 0) |
| 1059 | dma_unmap_sg(device->card->device, scsi_sglist(orb->cmd), |
| 1060 | scsi_sg_count(orb->cmd), |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1061 | orb->cmd->sc_data_direction); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1062 | |
| 1063 | if (orb->page_table_bus != 0) |
| 1064 | dma_unmap_single(device->card->device, orb->page_table_bus, |
Stefan Richter | b4be016 | 2007-07-02 22:07:34 +0200 | [diff] [blame] | 1065 | sizeof(orb->page_table), DMA_TO_DEVICE); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1066 | |
Kristian Høgsberg | fbb5423 | 2007-04-10 18:11:18 -0400 | [diff] [blame] | 1067 | orb->cmd->result = result; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1068 | orb->done(orb->cmd); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1069 | } |
| 1070 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1071 | static int |
| 1072 | sbp2_map_scatterlist(struct sbp2_command_orb *orb, struct fw_device *device, |
| 1073 | struct sbp2_logical_unit *lu) |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1074 | { |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1075 | struct scatterlist *sg; |
| 1076 | int sg_len, l, i, j, count; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1077 | dma_addr_t sg_addr; |
| 1078 | |
Stefan Richter | 412edf6 | 2007-07-16 21:05:41 +0200 | [diff] [blame] | 1079 | sg = scsi_sglist(orb->cmd); |
| 1080 | count = dma_map_sg(device->card->device, sg, scsi_sg_count(orb->cmd), |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1081 | orb->cmd->sc_data_direction); |
Kristian Høgsberg | 95ffc5e | 2007-05-09 19:23:08 -0400 | [diff] [blame] | 1082 | if (count == 0) |
| 1083 | goto fail; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1084 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1085 | /* |
| 1086 | * Handle the special case where there is only one element in |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1087 | * the scatter list by converting it to an immediate block |
| 1088 | * request. This is also a workaround for broken devices such |
| 1089 | * as the second generation iPod which doesn't support page |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1090 | * tables. |
| 1091 | */ |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1092 | if (count == 1 && sg_dma_len(sg) < SBP2_MAX_SG_ELEMENT_LENGTH) { |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1093 | orb->request.data_descriptor.high = lu->tgt->address_high; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1094 | orb->request.data_descriptor.low = sg_dma_address(sg); |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1095 | orb->request.misc |= COMMAND_ORB_DATA_SIZE(sg_dma_len(sg)); |
Kristian Høgsberg | 95ffc5e | 2007-05-09 19:23:08 -0400 | [diff] [blame] | 1096 | return 0; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1097 | } |
| 1098 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1099 | /* |
| 1100 | * Convert the scatterlist to an sbp2 page table. If any |
Kristian Høgsberg, Stefan Richter | 36abb3b | 2007-05-09 19:23:10 -0400 | [diff] [blame] | 1101 | * scatterlist entries are too big for sbp2, we split them as we |
| 1102 | * go. Even if we ask the block I/O layer to not give us sg |
| 1103 | * elements larger than 65535 bytes, some IOMMUs may merge sg elements |
| 1104 | * during DMA mapping, and Linux currently doesn't prevent this. |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1105 | */ |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1106 | for (i = 0, j = 0; i < count; i++) { |
| 1107 | sg_len = sg_dma_len(sg + i); |
| 1108 | sg_addr = sg_dma_address(sg + i); |
| 1109 | while (sg_len) { |
Stefan Richter | 332ef33 | 2007-07-01 13:56:03 +0200 | [diff] [blame] | 1110 | /* FIXME: This won't get us out of the pinch. */ |
| 1111 | if (unlikely(j >= ARRAY_SIZE(orb->page_table))) { |
| 1112 | fw_error("page table overflow\n"); |
| 1113 | goto fail_page_table; |
| 1114 | } |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1115 | l = min(sg_len, SBP2_MAX_SG_ELEMENT_LENGTH); |
| 1116 | orb->page_table[j].low = sg_addr; |
| 1117 | orb->page_table[j].high = (l << 16); |
| 1118 | sg_addr += l; |
| 1119 | sg_len -= l; |
| 1120 | j++; |
| 1121 | } |
| 1122 | } |
| 1123 | |
Stefan Richter | b4be016 | 2007-07-02 22:07:34 +0200 | [diff] [blame] | 1124 | fw_memcpy_to_be32(orb->page_table, orb->page_table, |
| 1125 | sizeof(orb->page_table[0]) * j); |
| 1126 | orb->page_table_bus = |
| 1127 | dma_map_single(device->card->device, orb->page_table, |
| 1128 | sizeof(orb->page_table), DMA_TO_DEVICE); |
| 1129 | if (dma_mapping_error(orb->page_table_bus)) |
| 1130 | goto fail_page_table; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1131 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1132 | /* |
| 1133 | * The data_descriptor pointer is the one case where we need |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1134 | * to fill in the node ID part of the address. All other |
| 1135 | * pointers assume that the data referenced reside on the |
| 1136 | * initiator (i.e. us), but data_descriptor can refer to data |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1137 | * on other nodes so we need to put our ID in descriptor.high. |
| 1138 | */ |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1139 | orb->request.data_descriptor.high = lu->tgt->address_high; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1140 | orb->request.data_descriptor.low = orb->page_table_bus; |
| 1141 | orb->request.misc |= |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 1142 | COMMAND_ORB_PAGE_TABLE_PRESENT | |
| 1143 | COMMAND_ORB_DATA_SIZE(j); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1144 | |
Kristian Høgsberg | 95ffc5e | 2007-05-09 19:23:08 -0400 | [diff] [blame] | 1145 | return 0; |
| 1146 | |
| 1147 | fail_page_table: |
Stefan Richter | 412edf6 | 2007-07-16 21:05:41 +0200 | [diff] [blame] | 1148 | dma_unmap_sg(device->card->device, sg, scsi_sg_count(orb->cmd), |
Kristian Høgsberg | 95ffc5e | 2007-05-09 19:23:08 -0400 | [diff] [blame] | 1149 | orb->cmd->sc_data_direction); |
| 1150 | fail: |
| 1151 | return -ENOMEM; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1152 | } |
| 1153 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1154 | /* SCSI stack integration */ |
| 1155 | |
| 1156 | static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done) |
| 1157 | { |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1158 | struct sbp2_logical_unit *lu = cmd->device->hostdata; |
| 1159 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1160 | struct sbp2_command_orb *orb; |
Stefan Richter | 25659f7 | 2007-07-21 22:43:05 +0200 | [diff] [blame] | 1161 | unsigned max_payload; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1162 | int retval = SCSI_MLQUEUE_HOST_BUSY; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1163 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1164 | /* |
| 1165 | * Bidirectional commands are not yet implemented, and unknown |
| 1166 | * transfer direction not handled. |
| 1167 | */ |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1168 | if (cmd->sc_data_direction == DMA_BIDIRECTIONAL) { |
Stefan Richter | 8a8cea2 | 2007-06-09 19:26:22 +0200 | [diff] [blame] | 1169 | fw_error("Can't handle DMA_BIDIRECTIONAL, rejecting command\n"); |
Kristian Høgsberg | e1b68c4 | 2007-05-09 19:23:09 -0400 | [diff] [blame] | 1170 | cmd->result = DID_ERROR << 16; |
| 1171 | done(cmd); |
| 1172 | return 0; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1173 | } |
| 1174 | |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 1175 | orb = kzalloc(sizeof(*orb), GFP_ATOMIC); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1176 | if (orb == NULL) { |
| 1177 | fw_notify("failed to alloc orb\n"); |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1178 | return SCSI_MLQUEUE_HOST_BUSY; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1179 | } |
| 1180 | |
Kristian Høgsberg | 12f26aa | 2007-04-10 18:11:20 -0400 | [diff] [blame] | 1181 | /* Initialize rcode to something not RCODE_COMPLETE. */ |
| 1182 | orb->base.rcode = -1; |
Kristian Høgsberg | e57d201 | 2007-08-24 18:59:58 -0400 | [diff] [blame] | 1183 | kref_init(&orb->base.kref); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1184 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1185 | orb->lu = lu; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1186 | orb->done = done; |
| 1187 | orb->cmd = cmd; |
| 1188 | |
| 1189 | orb->request.next.high = SBP2_ORB_NULL; |
| 1190 | orb->request.next.low = 0x0; |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1191 | /* |
| 1192 | * At speed 100 we can do 512 bytes per packet, at speed 200, |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1193 | * 1024 bytes per packet etc. The SBP-2 max_payload field |
| 1194 | * specifies the max payload size as 2 ^ (max_payload + 2), so |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1195 | * if we set this to max_speed + 7, we get the right value. |
| 1196 | */ |
Stefan Richter | 25659f7 | 2007-07-21 22:43:05 +0200 | [diff] [blame] | 1197 | max_payload = min(device->max_speed + 7, |
| 1198 | device->card->max_receive - 1); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1199 | orb->request.misc = |
Stefan Richter | 25659f7 | 2007-07-21 22:43:05 +0200 | [diff] [blame] | 1200 | COMMAND_ORB_MAX_PAYLOAD(max_payload) | |
Stefan Richter | f139749 | 2007-06-10 21:31:36 +0200 | [diff] [blame] | 1201 | COMMAND_ORB_SPEED(device->max_speed) | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 1202 | COMMAND_ORB_NOTIFY; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1203 | |
| 1204 | if (cmd->sc_data_direction == DMA_FROM_DEVICE) |
| 1205 | orb->request.misc |= |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 1206 | COMMAND_ORB_DIRECTION(SBP2_DIRECTION_FROM_MEDIA); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1207 | else if (cmd->sc_data_direction == DMA_TO_DEVICE) |
| 1208 | orb->request.misc |= |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 1209 | COMMAND_ORB_DIRECTION(SBP2_DIRECTION_TO_MEDIA); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1210 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1211 | if (scsi_sg_count(cmd) && sbp2_map_scatterlist(orb, device, lu) < 0) |
| 1212 | goto out; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1213 | |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 1214 | fw_memcpy_to_be32(&orb->request, &orb->request, sizeof(orb->request)); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1215 | |
| 1216 | memset(orb->request.command_block, |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 1217 | 0, sizeof(orb->request.command_block)); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1218 | memcpy(orb->request.command_block, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd)); |
| 1219 | |
| 1220 | orb->base.callback = complete_command_orb; |
Stefan Richter | 8526392 | 2007-07-02 21:04:08 +0200 | [diff] [blame] | 1221 | orb->base.request_bus = |
| 1222 | dma_map_single(device->card->device, &orb->request, |
| 1223 | sizeof(orb->request), DMA_TO_DEVICE); |
| 1224 | if (dma_mapping_error(orb->base.request_bus)) |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1225 | goto out; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1226 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1227 | sbp2_send_orb(&orb->base, lu, lu->tgt->node_id, lu->generation, |
| 1228 | lu->command_block_agent_address + SBP2_ORB_POINTER); |
| 1229 | retval = 0; |
| 1230 | out: |
Kristian Høgsberg | e57d201 | 2007-08-24 18:59:58 -0400 | [diff] [blame] | 1231 | kref_put(&orb->base.kref, free_orb); |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1232 | return retval; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1233 | } |
| 1234 | |
Stefan Richter | cfb0138 | 2007-01-23 21:20:08 +0100 | [diff] [blame] | 1235 | static int sbp2_scsi_slave_alloc(struct scsi_device *sdev) |
| 1236 | { |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1237 | struct sbp2_logical_unit *lu = sdev->hostdata; |
Stefan Richter | cfb0138 | 2007-01-23 21:20:08 +0100 | [diff] [blame] | 1238 | |
| 1239 | sdev->allow_restart = 1; |
| 1240 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1241 | if (lu->tgt->workarounds & SBP2_WORKAROUND_INQUIRY_36) |
Stefan Richter | cfb0138 | 2007-01-23 21:20:08 +0100 | [diff] [blame] | 1242 | sdev->inquiry_len = 36; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1243 | |
Stefan Richter | cfb0138 | 2007-01-23 21:20:08 +0100 | [diff] [blame] | 1244 | return 0; |
| 1245 | } |
| 1246 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1247 | static int sbp2_scsi_slave_configure(struct scsi_device *sdev) |
| 1248 | { |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1249 | struct sbp2_logical_unit *lu = sdev->hostdata; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1250 | |
Stefan Richter | cfb0138 | 2007-01-23 21:20:08 +0100 | [diff] [blame] | 1251 | sdev->use_10_for_rw = 1; |
| 1252 | |
| 1253 | if (sdev->type == TYPE_ROM) |
| 1254 | sdev->use_10_for_ms = 1; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1255 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1256 | if (sdev->type == TYPE_DISK && |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1257 | lu->tgt->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1258 | sdev->skip_ms_page_8 = 1; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1259 | |
| 1260 | if (lu->tgt->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1261 | sdev->fix_capacity = 1; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1262 | |
| 1263 | if (lu->tgt->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS) |
Stefan Richter | cf47c7a | 2007-06-17 23:52:08 +0200 | [diff] [blame] | 1264 | blk_queue_max_sectors(sdev->request_queue, 128 * 1024 / 512); |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1265 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1266 | return 0; |
| 1267 | } |
| 1268 | |
| 1269 | /* |
| 1270 | * Called by scsi stack when something has really gone wrong. Usually |
| 1271 | * called when a command has timed-out for some reason. |
| 1272 | */ |
| 1273 | static int sbp2_scsi_abort(struct scsi_cmnd *cmd) |
| 1274 | { |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1275 | struct sbp2_logical_unit *lu = cmd->device->hostdata; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1276 | |
| 1277 | fw_notify("sbp2_scsi_abort\n"); |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1278 | sbp2_agent_reset(lu); |
| 1279 | sbp2_cancel_orbs(lu); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1280 | |
| 1281 | return SUCCESS; |
| 1282 | } |
| 1283 | |
Stefan Richter | 14e2198 | 2007-05-27 13:18:27 +0200 | [diff] [blame] | 1284 | /* |
| 1285 | * Format of /sys/bus/scsi/devices/.../ieee1394_id: |
| 1286 | * u64 EUI-64 : u24 directory_ID : u16 LUN (all printed in hexadecimal) |
| 1287 | * |
| 1288 | * This is the concatenation of target port identifier and logical unit |
| 1289 | * identifier as per SAM-2...SAM-4 annex A. |
| 1290 | */ |
| 1291 | static ssize_t |
| 1292 | sbp2_sysfs_ieee1394_id_show(struct device *dev, struct device_attribute *attr, |
| 1293 | char *buf) |
| 1294 | { |
| 1295 | struct scsi_device *sdev = to_scsi_device(dev); |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1296 | struct sbp2_logical_unit *lu; |
Stefan Richter | 14e2198 | 2007-05-27 13:18:27 +0200 | [diff] [blame] | 1297 | struct fw_device *device; |
Stefan Richter | 14e2198 | 2007-05-27 13:18:27 +0200 | [diff] [blame] | 1298 | |
| 1299 | if (!sdev) |
| 1300 | return 0; |
Stefan Richter | 14e2198 | 2007-05-27 13:18:27 +0200 | [diff] [blame] | 1301 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1302 | lu = sdev->hostdata; |
| 1303 | device = fw_device(lu->tgt->unit->device.parent); |
Stefan Richter | 14e2198 | 2007-05-27 13:18:27 +0200 | [diff] [blame] | 1304 | |
| 1305 | return sprintf(buf, "%08x%08x:%06x:%04x\n", |
| 1306 | device->config_rom[3], device->config_rom[4], |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1307 | lu->tgt->directory_id, lu->lun); |
Stefan Richter | 14e2198 | 2007-05-27 13:18:27 +0200 | [diff] [blame] | 1308 | } |
| 1309 | |
| 1310 | static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); |
| 1311 | |
| 1312 | static struct device_attribute *sbp2_scsi_sysfs_attrs[] = { |
| 1313 | &dev_attr_ieee1394_id, |
| 1314 | NULL |
| 1315 | }; |
| 1316 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1317 | static struct scsi_host_template scsi_driver_template = { |
| 1318 | .module = THIS_MODULE, |
| 1319 | .name = "SBP-2 IEEE-1394", |
Kristian Høgsberg | b02b6bc | 2007-05-09 19:23:12 -0400 | [diff] [blame] | 1320 | .proc_name = sbp2_driver_name, |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1321 | .queuecommand = sbp2_scsi_queuecommand, |
Stefan Richter | cfb0138 | 2007-01-23 21:20:08 +0100 | [diff] [blame] | 1322 | .slave_alloc = sbp2_scsi_slave_alloc, |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1323 | .slave_configure = sbp2_scsi_slave_configure, |
| 1324 | .eh_abort_handler = sbp2_scsi_abort, |
| 1325 | .this_id = -1, |
| 1326 | .sg_tablesize = SG_ALL, |
| 1327 | .use_clustering = ENABLE_CLUSTERING, |
Stefan Richter | 02af8e7 | 2007-01-21 20:50:11 +0100 | [diff] [blame] | 1328 | .cmd_per_lun = 1, |
| 1329 | .can_queue = 1, |
Stefan Richter | 14e2198 | 2007-05-27 13:18:27 +0200 | [diff] [blame] | 1330 | .sdev_attrs = sbp2_scsi_sysfs_attrs, |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1331 | }; |
| 1332 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1333 | MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); |
| 1334 | MODULE_DESCRIPTION("SCSI over IEEE1394"); |
| 1335 | MODULE_LICENSE("GPL"); |
| 1336 | MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); |
| 1337 | |
Olaf Hering | 1e4c7b0 | 2007-05-05 23:17:13 +0200 | [diff] [blame] | 1338 | /* Provide a module alias so root-on-sbp2 initrds don't break. */ |
| 1339 | #ifndef CONFIG_IEEE1394_SBP2_MODULE |
| 1340 | MODULE_ALIAS("sbp2"); |
| 1341 | #endif |
| 1342 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1343 | static int __init sbp2_init(void) |
| 1344 | { |
Stefan Richter | df8ec24 | 2007-08-12 12:51:18 +0200 | [diff] [blame] | 1345 | sbp2_wq = create_singlethread_workqueue(KBUILD_MODNAME); |
| 1346 | if (!sbp2_wq) |
| 1347 | return -ENOMEM; |
| 1348 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1349 | return driver_register(&sbp2_driver.driver); |
| 1350 | } |
| 1351 | |
| 1352 | static void __exit sbp2_cleanup(void) |
| 1353 | { |
| 1354 | driver_unregister(&sbp2_driver.driver); |
Stefan Richter | df8ec24 | 2007-08-12 12:51:18 +0200 | [diff] [blame] | 1355 | destroy_workqueue(sbp2_wq); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1356 | } |
| 1357 | |
| 1358 | module_init(sbp2_init); |
| 1359 | module_exit(sbp2_cleanup); |