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 | |
Stefan Richter | 7bb6bf7 | 2008-02-03 23:12:17 +0100 | [diff] [blame] | 31 | #include <linux/blkdev.h> |
Stefan Richter | 9220f19 | 2008-02-03 23:04:38 +0100 | [diff] [blame] | 32 | #include <linux/delay.h> |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 33 | #include <linux/device.h> |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 34 | #include <linux/dma-mapping.h> |
Stefan Richter | 7bb6bf7 | 2008-02-03 23:12:17 +0100 | [diff] [blame] | 35 | #include <linux/kernel.h> |
| 36 | #include <linux/mod_devicetable.h> |
| 37 | #include <linux/module.h> |
| 38 | #include <linux/moduleparam.h> |
| 39 | #include <linux/scatterlist.h> |
Stefan Richter | e7cdf23 | 2007-07-01 13:54:57 +0200 | [diff] [blame] | 40 | #include <linux/string.h> |
Stefan Richter | 2df222b | 2007-08-13 17:48:25 +0200 | [diff] [blame] | 41 | #include <linux/stringify.h> |
Kristian Høgsberg | 1d3d52c | 2007-02-06 14:49:33 -0500 | [diff] [blame] | 42 | #include <linux/timer.h> |
Stefan Richter | df8ec24 | 2007-08-12 12:51:18 +0200 | [diff] [blame] | 43 | #include <linux/workqueue.h> |
Stefan Richter | b5d2a5e | 2008-01-25 18:57:41 +0100 | [diff] [blame] | 44 | #include <asm/system.h> |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 45 | |
| 46 | #include <scsi/scsi.h> |
| 47 | #include <scsi/scsi_cmnd.h> |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 48 | #include <scsi/scsi_device.h> |
| 49 | #include <scsi/scsi_host.h> |
| 50 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 51 | #include "fw-device.h" |
Stefan Richter | 7bb6bf7 | 2008-02-03 23:12:17 +0100 | [diff] [blame] | 52 | #include "fw-topology.h" |
| 53 | #include "fw-transaction.h" |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 54 | |
Stefan Richter | 5cd54c9 | 2007-06-17 23:55:41 +0200 | [diff] [blame] | 55 | /* |
| 56 | * So far only bridges from Oxford Semiconductor are known to support |
| 57 | * concurrent logins. Depending on firmware, four or two concurrent logins |
| 58 | * are possible on OXFW911 and newer Oxsemi bridges. |
| 59 | * |
| 60 | * Concurrent logins are useful together with cluster filesystems. |
| 61 | */ |
| 62 | static int sbp2_param_exclusive_login = 1; |
| 63 | module_param_named(exclusive_login, sbp2_param_exclusive_login, bool, 0644); |
| 64 | MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device " |
| 65 | "(default = Y, use N for concurrent initiators)"); |
| 66 | |
Stefan Richter | 2df222b | 2007-08-13 17:48:25 +0200 | [diff] [blame] | 67 | /* |
| 68 | * Flags for firmware oddities |
| 69 | * |
| 70 | * - 128kB max transfer |
| 71 | * Limit transfer size. Necessary for some old bridges. |
| 72 | * |
| 73 | * - 36 byte inquiry |
| 74 | * When scsi_mod probes the device, let the inquiry command look like that |
| 75 | * from MS Windows. |
| 76 | * |
| 77 | * - skip mode page 8 |
| 78 | * Suppress sending of mode_sense for mode page 8 if the device pretends to |
| 79 | * support the SCSI Primary Block commands instead of Reduced Block Commands. |
| 80 | * |
| 81 | * - fix capacity |
| 82 | * Tell sd_mod to correct the last sector number reported by read_capacity. |
| 83 | * Avoids access beyond actual disk limits on devices with an off-by-one bug. |
| 84 | * Don't use this with devices which don't have this bug. |
| 85 | * |
Stefan Richter | 9220f19 | 2008-02-03 23:04:38 +0100 | [diff] [blame] | 86 | * - delay inquiry |
| 87 | * Wait extra SBP2_INQUIRY_DELAY seconds after login before SCSI inquiry. |
| 88 | * |
Stefan Richter | 2df222b | 2007-08-13 17:48:25 +0200 | [diff] [blame] | 89 | * - override internal blacklist |
| 90 | * Instead of adding to the built-in blacklist, use only the workarounds |
| 91 | * specified in the module load parameter. |
| 92 | * Useful if a blacklist entry interfered with a non-broken device. |
| 93 | */ |
| 94 | #define SBP2_WORKAROUND_128K_MAX_TRANS 0x1 |
| 95 | #define SBP2_WORKAROUND_INQUIRY_36 0x2 |
| 96 | #define SBP2_WORKAROUND_MODE_SENSE_8 0x4 |
| 97 | #define SBP2_WORKAROUND_FIX_CAPACITY 0x8 |
Stefan Richter | 9220f19 | 2008-02-03 23:04:38 +0100 | [diff] [blame] | 98 | #define SBP2_WORKAROUND_DELAY_INQUIRY 0x10 |
| 99 | #define SBP2_INQUIRY_DELAY 12 |
Stefan Richter | 2df222b | 2007-08-13 17:48:25 +0200 | [diff] [blame] | 100 | #define SBP2_WORKAROUND_OVERRIDE 0x100 |
| 101 | |
| 102 | static int sbp2_param_workarounds; |
| 103 | module_param_named(workarounds, sbp2_param_workarounds, int, 0644); |
| 104 | MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0" |
| 105 | ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS) |
| 106 | ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36) |
| 107 | ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8) |
| 108 | ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY) |
Stefan Richter | 9220f19 | 2008-02-03 23:04:38 +0100 | [diff] [blame] | 109 | ", delay inquiry = " __stringify(SBP2_WORKAROUND_DELAY_INQUIRY) |
Stefan Richter | 2df222b | 2007-08-13 17:48:25 +0200 | [diff] [blame] | 110 | ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE) |
| 111 | ", or a combination)"); |
| 112 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 113 | /* 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] | 114 | typedef void (*scsi_done_fn_t)(struct scsi_cmnd *); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 115 | |
| 116 | static const char sbp2_driver_name[] = "sbp2"; |
| 117 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 118 | /* |
| 119 | * We create one struct sbp2_logical_unit per SBP-2 Logical Unit Number Entry |
| 120 | * and one struct scsi_device per sbp2_logical_unit. |
| 121 | */ |
| 122 | struct sbp2_logical_unit { |
| 123 | struct sbp2_target *tgt; |
| 124 | struct list_head link; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 125 | struct fw_address_handler address_handler; |
| 126 | struct list_head orb_list; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 127 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 128 | u64 command_block_agent_address; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 129 | u16 lun; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 130 | int login_id; |
| 131 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 132 | /* |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 133 | * The generation is updated once we've logged in or reconnected |
| 134 | * to the logical unit. Thus, I/O to the device will automatically |
| 135 | * fail and get retried if it happens in a window where the device |
| 136 | * 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] | 137 | */ |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 138 | int generation; |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 139 | int retries; |
| 140 | struct delayed_work work; |
Stefan Richter | f843615 | 2008-02-26 23:30:02 +0100 | [diff] [blame^] | 141 | bool has_sdev; |
Stefan Richter | 2e2705b | 2008-02-16 16:37:28 +0100 | [diff] [blame] | 142 | bool blocked; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 143 | }; |
| 144 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 145 | /* |
| 146 | * We create one struct sbp2_target per IEEE 1212 Unit Directory |
| 147 | * and one struct Scsi_Host per sbp2_target. |
| 148 | */ |
| 149 | struct sbp2_target { |
| 150 | struct kref kref; |
| 151 | struct fw_unit *unit; |
Stefan Richter | 48f18c7 | 2008-02-03 23:09:50 +0100 | [diff] [blame] | 152 | const char *bus_id; |
Stefan Richter | 05cca73 | 2008-01-26 17:42:45 +0100 | [diff] [blame] | 153 | struct list_head lu_list; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 154 | |
| 155 | u64 management_agent_address; |
| 156 | int directory_id; |
| 157 | int node_id; |
| 158 | int address_high; |
Stefan Richter | 05cca73 | 2008-01-26 17:42:45 +0100 | [diff] [blame] | 159 | unsigned int workarounds; |
Jarod Wilson | 384170d | 2008-01-25 23:31:12 -0500 | [diff] [blame] | 160 | unsigned int mgt_orb_timeout; |
Stefan Richter | 2e2705b | 2008-02-16 16:37:28 +0100 | [diff] [blame] | 161 | |
| 162 | int dont_block; /* counter for each logical unit */ |
| 163 | int blocked; /* ditto */ |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 164 | }; |
| 165 | |
Jarod Wilson | a4c379c | 2008-01-19 13:15:05 +0100 | [diff] [blame] | 166 | /* |
| 167 | * Per section 7.4.8 of the SBP-2 spec, a mgt_ORB_timeout value can be |
Jarod Wilson | 384170d | 2008-01-25 23:31:12 -0500 | [diff] [blame] | 168 | * provided in the config rom. Most devices do provide a value, which |
| 169 | * we'll use for login management orbs, but with some sane limits. |
Jarod Wilson | a4c379c | 2008-01-19 13:15:05 +0100 | [diff] [blame] | 170 | */ |
Jarod Wilson | 384170d | 2008-01-25 23:31:12 -0500 | [diff] [blame] | 171 | #define SBP2_MIN_LOGIN_ORB_TIMEOUT 5000U /* Timeout in ms */ |
| 172 | #define SBP2_MAX_LOGIN_ORB_TIMEOUT 40000U /* Timeout in ms */ |
Stefan Richter | 05cca73 | 2008-01-26 17:42:45 +0100 | [diff] [blame] | 173 | #define SBP2_ORB_TIMEOUT 2000U /* Timeout in ms */ |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 174 | #define SBP2_ORB_NULL 0x80000000 |
Jarod Wilson | a4c379c | 2008-01-19 13:15:05 +0100 | [diff] [blame] | 175 | #define SBP2_MAX_SG_ELEMENT_LENGTH 0xf000 |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 176 | |
| 177 | #define SBP2_DIRECTION_TO_MEDIA 0x0 |
| 178 | #define SBP2_DIRECTION_FROM_MEDIA 0x1 |
| 179 | |
| 180 | /* Unit directory keys */ |
Jarod Wilson | 384170d | 2008-01-25 23:31:12 -0500 | [diff] [blame] | 181 | #define SBP2_CSR_UNIT_CHARACTERISTICS 0x3a |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 182 | #define SBP2_CSR_FIRMWARE_REVISION 0x3c |
| 183 | #define SBP2_CSR_LOGICAL_UNIT_NUMBER 0x14 |
| 184 | #define SBP2_CSR_LOGICAL_UNIT_DIRECTORY 0xd4 |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 185 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 186 | /* Management orb opcodes */ |
| 187 | #define SBP2_LOGIN_REQUEST 0x0 |
| 188 | #define SBP2_QUERY_LOGINS_REQUEST 0x1 |
| 189 | #define SBP2_RECONNECT_REQUEST 0x3 |
| 190 | #define SBP2_SET_PASSWORD_REQUEST 0x4 |
| 191 | #define SBP2_LOGOUT_REQUEST 0x7 |
| 192 | #define SBP2_ABORT_TASK_REQUEST 0xb |
| 193 | #define SBP2_ABORT_TASK_SET 0xc |
| 194 | #define SBP2_LOGICAL_UNIT_RESET 0xe |
| 195 | #define SBP2_TARGET_RESET_REQUEST 0xf |
| 196 | |
| 197 | /* Offsets for command block agent registers */ |
| 198 | #define SBP2_AGENT_STATE 0x00 |
| 199 | #define SBP2_AGENT_RESET 0x04 |
| 200 | #define SBP2_ORB_POINTER 0x08 |
| 201 | #define SBP2_DOORBELL 0x10 |
| 202 | #define SBP2_UNSOLICITED_STATUS_ENABLE 0x14 |
| 203 | |
| 204 | /* Status write response codes */ |
| 205 | #define SBP2_STATUS_REQUEST_COMPLETE 0x0 |
| 206 | #define SBP2_STATUS_TRANSPORT_FAILURE 0x1 |
| 207 | #define SBP2_STATUS_ILLEGAL_REQUEST 0x2 |
| 208 | #define SBP2_STATUS_VENDOR_DEPENDENT 0x3 |
| 209 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 210 | #define STATUS_GET_ORB_HIGH(v) ((v).status & 0xffff) |
| 211 | #define STATUS_GET_SBP_STATUS(v) (((v).status >> 16) & 0xff) |
| 212 | #define STATUS_GET_LEN(v) (((v).status >> 24) & 0x07) |
| 213 | #define STATUS_GET_DEAD(v) (((v).status >> 27) & 0x01) |
| 214 | #define STATUS_GET_RESPONSE(v) (((v).status >> 28) & 0x03) |
| 215 | #define STATUS_GET_SOURCE(v) (((v).status >> 30) & 0x03) |
| 216 | #define STATUS_GET_ORB_LOW(v) ((v).orb_low) |
| 217 | #define STATUS_GET_DATA(v) ((v).data) |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 218 | |
| 219 | struct sbp2_status { |
| 220 | u32 status; |
| 221 | u32 orb_low; |
| 222 | u8 data[24]; |
| 223 | }; |
| 224 | |
| 225 | struct sbp2_pointer { |
| 226 | u32 high; |
| 227 | u32 low; |
| 228 | }; |
| 229 | |
| 230 | struct sbp2_orb { |
| 231 | struct fw_transaction t; |
Kristian Høgsberg | e57d201 | 2007-08-24 18:59:58 -0400 | [diff] [blame] | 232 | struct kref kref; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 233 | dma_addr_t request_bus; |
| 234 | int rcode; |
| 235 | struct sbp2_pointer pointer; |
Kristian Høgsberg | a98e271 | 2007-05-07 20:33:34 -0400 | [diff] [blame] | 236 | void (*callback)(struct sbp2_orb * orb, struct sbp2_status * status); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 237 | struct list_head link; |
| 238 | }; |
| 239 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 240 | #define MANAGEMENT_ORB_LUN(v) ((v)) |
| 241 | #define MANAGEMENT_ORB_FUNCTION(v) ((v) << 16) |
| 242 | #define MANAGEMENT_ORB_RECONNECT(v) ((v) << 20) |
Stefan Richter | 5cd54c9 | 2007-06-17 23:55:41 +0200 | [diff] [blame] | 243 | #define MANAGEMENT_ORB_EXCLUSIVE(v) ((v) ? 1 << 28 : 0) |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 244 | #define MANAGEMENT_ORB_REQUEST_FORMAT(v) ((v) << 29) |
| 245 | #define MANAGEMENT_ORB_NOTIFY ((1) << 31) |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 246 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 247 | #define MANAGEMENT_ORB_RESPONSE_LENGTH(v) ((v)) |
| 248 | #define MANAGEMENT_ORB_PASSWORD_LENGTH(v) ((v) << 16) |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 249 | |
| 250 | struct sbp2_management_orb { |
| 251 | struct sbp2_orb base; |
| 252 | struct { |
| 253 | struct sbp2_pointer password; |
| 254 | struct sbp2_pointer response; |
| 255 | u32 misc; |
| 256 | u32 length; |
| 257 | struct sbp2_pointer status_fifo; |
| 258 | } request; |
| 259 | __be32 response[4]; |
| 260 | dma_addr_t response_bus; |
| 261 | struct completion done; |
| 262 | struct sbp2_status status; |
| 263 | }; |
| 264 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 265 | #define LOGIN_RESPONSE_GET_LOGIN_ID(v) ((v).misc & 0xffff) |
| 266 | #define LOGIN_RESPONSE_GET_LENGTH(v) (((v).misc >> 16) & 0xffff) |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 267 | |
| 268 | struct sbp2_login_response { |
| 269 | u32 misc; |
| 270 | struct sbp2_pointer command_block_agent; |
| 271 | u32 reconnect_hold; |
| 272 | }; |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 273 | #define COMMAND_ORB_DATA_SIZE(v) ((v)) |
| 274 | #define COMMAND_ORB_PAGE_SIZE(v) ((v) << 16) |
| 275 | #define COMMAND_ORB_PAGE_TABLE_PRESENT ((1) << 19) |
| 276 | #define COMMAND_ORB_MAX_PAYLOAD(v) ((v) << 20) |
| 277 | #define COMMAND_ORB_SPEED(v) ((v) << 24) |
| 278 | #define COMMAND_ORB_DIRECTION(v) ((v) << 27) |
| 279 | #define COMMAND_ORB_REQUEST_FORMAT(v) ((v) << 29) |
| 280 | #define COMMAND_ORB_NOTIFY ((1) << 31) |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 281 | |
| 282 | struct sbp2_command_orb { |
| 283 | struct sbp2_orb base; |
| 284 | struct { |
| 285 | struct sbp2_pointer next; |
| 286 | struct sbp2_pointer data_descriptor; |
| 287 | u32 misc; |
| 288 | u8 command_block[12]; |
| 289 | } request; |
| 290 | struct scsi_cmnd *cmd; |
| 291 | scsi_done_fn_t done; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 292 | struct sbp2_logical_unit *lu; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 293 | |
Stefan Richter | 9fb2dd1 | 2007-07-01 13:55:31 +0200 | [diff] [blame] | 294 | struct sbp2_pointer page_table[SG_ALL] __attribute__((aligned(8))); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 295 | dma_addr_t page_table_bus; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 296 | }; |
| 297 | |
| 298 | /* |
| 299 | * List of devices with known bugs. |
| 300 | * |
| 301 | * The firmware_revision field, masked with 0xffff00, is the best |
| 302 | * indicator for the type of bridge chip of a device. It yields a few |
| 303 | * false positives but this did not break correctly behaving devices |
| 304 | * so far. We use ~0 as a wildcard, since the 24 bit values we get |
| 305 | * from the config rom can never match that. |
| 306 | */ |
| 307 | static const struct { |
| 308 | u32 firmware_revision; |
| 309 | u32 model; |
Stefan Richter | 05cca73 | 2008-01-26 17:42:45 +0100 | [diff] [blame] | 310 | unsigned int workarounds; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 311 | } sbp2_workarounds_table[] = { |
| 312 | /* DViCO Momobay CX-1 with TSB42AA9 bridge */ { |
| 313 | .firmware_revision = 0x002800, |
| 314 | .model = 0x001010, |
| 315 | .workarounds = SBP2_WORKAROUND_INQUIRY_36 | |
| 316 | SBP2_WORKAROUND_MODE_SENSE_8, |
| 317 | }, |
Stefan Richter | 9220f19 | 2008-02-03 23:04:38 +0100 | [diff] [blame] | 318 | /* DViCO Momobay FX-3A with TSB42AA9A bridge */ { |
| 319 | .firmware_revision = 0x002800, |
| 320 | .model = 0x000000, |
| 321 | .workarounds = SBP2_WORKAROUND_DELAY_INQUIRY, |
| 322 | }, |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 323 | /* Initio bridges, actually only needed for some older ones */ { |
| 324 | .firmware_revision = 0x000200, |
| 325 | .model = ~0, |
| 326 | .workarounds = SBP2_WORKAROUND_INQUIRY_36, |
| 327 | }, |
| 328 | /* Symbios bridge */ { |
| 329 | .firmware_revision = 0xa0b800, |
| 330 | .model = ~0, |
| 331 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, |
| 332 | }, |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 333 | |
| 334 | /* |
| 335 | * There are iPods (2nd gen, 3rd gen) with model_id == 0, but |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 336 | * these iPods do not feature the read_capacity bug according |
| 337 | * to one report. Read_capacity behaviour as well as model_id |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 338 | * could change due to Apple-supplied firmware updates though. |
| 339 | */ |
| 340 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 341 | /* iPod 4th generation. */ { |
| 342 | .firmware_revision = 0x0a2700, |
| 343 | .model = 0x000021, |
| 344 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, |
| 345 | }, |
| 346 | /* iPod mini */ { |
| 347 | .firmware_revision = 0x0a2700, |
| 348 | .model = 0x000023, |
| 349 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, |
| 350 | }, |
| 351 | /* iPod Photo */ { |
| 352 | .firmware_revision = 0x0a2700, |
| 353 | .model = 0x00007e, |
| 354 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, |
| 355 | } |
| 356 | }; |
| 357 | |
| 358 | static void |
Kristian Høgsberg | e57d201 | 2007-08-24 18:59:58 -0400 | [diff] [blame] | 359 | free_orb(struct kref *kref) |
| 360 | { |
| 361 | struct sbp2_orb *orb = container_of(kref, struct sbp2_orb, kref); |
| 362 | |
| 363 | kfree(orb); |
| 364 | } |
| 365 | |
| 366 | static void |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 367 | sbp2_status_write(struct fw_card *card, struct fw_request *request, |
| 368 | int tcode, int destination, int source, |
| 369 | int generation, int speed, |
| 370 | unsigned long long offset, |
| 371 | void *payload, size_t length, void *callback_data) |
| 372 | { |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 373 | struct sbp2_logical_unit *lu = callback_data; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 374 | struct sbp2_orb *orb; |
| 375 | struct sbp2_status status; |
| 376 | size_t header_size; |
| 377 | unsigned long flags; |
| 378 | |
| 379 | if (tcode != TCODE_WRITE_BLOCK_REQUEST || |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 380 | length == 0 || length > sizeof(status)) { |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 381 | fw_send_response(card, request, RCODE_TYPE_ERROR); |
| 382 | return; |
| 383 | } |
| 384 | |
| 385 | header_size = min(length, 2 * sizeof(u32)); |
| 386 | fw_memcpy_from_be32(&status, payload, header_size); |
| 387 | if (length > header_size) |
| 388 | memcpy(status.data, payload + 8, length - header_size); |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 389 | if (STATUS_GET_SOURCE(status) == 2 || STATUS_GET_SOURCE(status) == 3) { |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 390 | fw_notify("non-orb related status write, not handled\n"); |
| 391 | fw_send_response(card, request, RCODE_COMPLETE); |
| 392 | return; |
| 393 | } |
| 394 | |
| 395 | /* Lookup the orb corresponding to this status write. */ |
| 396 | spin_lock_irqsave(&card->lock, flags); |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 397 | list_for_each_entry(orb, &lu->orb_list, link) { |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 398 | if (STATUS_GET_ORB_HIGH(status) == 0 && |
Kristian Høgsberg | e57d201 | 2007-08-24 18:59:58 -0400 | [diff] [blame] | 399 | STATUS_GET_ORB_LOW(status) == orb->request_bus) { |
| 400 | orb->rcode = RCODE_COMPLETE; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 401 | list_del(&orb->link); |
| 402 | break; |
| 403 | } |
| 404 | } |
| 405 | spin_unlock_irqrestore(&card->lock, flags); |
| 406 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 407 | if (&orb->link != &lu->orb_list) |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 408 | orb->callback(orb, &status); |
| 409 | else |
| 410 | fw_error("status write for unknown orb\n"); |
| 411 | |
Kristian Høgsberg | e57d201 | 2007-08-24 18:59:58 -0400 | [diff] [blame] | 412 | kref_put(&orb->kref, free_orb); |
| 413 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 414 | fw_send_response(card, request, RCODE_COMPLETE); |
| 415 | } |
| 416 | |
| 417 | static void |
| 418 | complete_transaction(struct fw_card *card, int rcode, |
| 419 | void *payload, size_t length, void *data) |
| 420 | { |
| 421 | struct sbp2_orb *orb = data; |
| 422 | unsigned long flags; |
| 423 | |
Kristian Høgsberg | e57d201 | 2007-08-24 18:59:58 -0400 | [diff] [blame] | 424 | /* |
| 425 | * This is a little tricky. We can get the status write for |
| 426 | * the orb before we get this callback. The status write |
| 427 | * handler above will assume the orb pointer transaction was |
| 428 | * successful and set the rcode to RCODE_COMPLETE for the orb. |
| 429 | * So this callback only sets the rcode if it hasn't already |
| 430 | * been set and only does the cleanup if the transaction |
| 431 | * failed and we didn't already get a status write. |
| 432 | */ |
| 433 | spin_lock_irqsave(&card->lock, flags); |
| 434 | |
| 435 | if (orb->rcode == -1) |
| 436 | orb->rcode = rcode; |
| 437 | if (orb->rcode != RCODE_COMPLETE) { |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 438 | list_del(&orb->link); |
Stefan Richter | 1b34e97 | 2007-08-25 10:40:42 +0200 | [diff] [blame] | 439 | spin_unlock_irqrestore(&card->lock, flags); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 440 | orb->callback(orb, NULL); |
Stefan Richter | 1b34e97 | 2007-08-25 10:40:42 +0200 | [diff] [blame] | 441 | } else { |
| 442 | spin_unlock_irqrestore(&card->lock, flags); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 443 | } |
Kristian Høgsberg | e57d201 | 2007-08-24 18:59:58 -0400 | [diff] [blame] | 444 | |
Kristian Høgsberg | e57d201 | 2007-08-24 18:59:58 -0400 | [diff] [blame] | 445 | kref_put(&orb->kref, free_orb); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 446 | } |
| 447 | |
| 448 | static void |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 449 | sbp2_send_orb(struct sbp2_orb *orb, struct sbp2_logical_unit *lu, |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 450 | int node_id, int generation, u64 offset) |
| 451 | { |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 452 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 453 | unsigned long flags; |
| 454 | |
| 455 | orb->pointer.high = 0; |
| 456 | orb->pointer.low = orb->request_bus; |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 457 | fw_memcpy_to_be32(&orb->pointer, &orb->pointer, sizeof(orb->pointer)); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 458 | |
| 459 | spin_lock_irqsave(&device->card->lock, flags); |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 460 | list_add_tail(&orb->link, &lu->orb_list); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 461 | spin_unlock_irqrestore(&device->card->lock, flags); |
| 462 | |
Kristian Høgsberg | e57d201 | 2007-08-24 18:59:58 -0400 | [diff] [blame] | 463 | /* Take a ref for the orb list and for the transaction callback. */ |
| 464 | kref_get(&orb->kref); |
| 465 | kref_get(&orb->kref); |
| 466 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 467 | fw_send_request(device->card, &orb->t, TCODE_WRITE_BLOCK_REQUEST, |
Stefan Richter | f139749 | 2007-06-10 21:31:36 +0200 | [diff] [blame] | 468 | node_id, generation, device->max_speed, offset, |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 469 | &orb->pointer, sizeof(orb->pointer), |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 470 | complete_transaction, orb); |
| 471 | } |
| 472 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 473 | static int sbp2_cancel_orbs(struct sbp2_logical_unit *lu) |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 474 | { |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 475 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 476 | struct sbp2_orb *orb, *next; |
| 477 | struct list_head list; |
| 478 | unsigned long flags; |
Kristian Høgsberg | 2aaad97 | 2007-03-07 12:12:47 -0500 | [diff] [blame] | 479 | int retval = -ENOENT; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 480 | |
| 481 | INIT_LIST_HEAD(&list); |
| 482 | spin_lock_irqsave(&device->card->lock, flags); |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 483 | list_splice_init(&lu->orb_list, &list); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 484 | spin_unlock_irqrestore(&device->card->lock, flags); |
| 485 | |
| 486 | list_for_each_entry_safe(orb, next, &list, link) { |
Kristian Høgsberg | 2aaad97 | 2007-03-07 12:12:47 -0500 | [diff] [blame] | 487 | retval = 0; |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 488 | if (fw_cancel_transaction(device->card, &orb->t) == 0) |
| 489 | continue; |
| 490 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 491 | orb->rcode = RCODE_CANCELLED; |
| 492 | orb->callback(orb, NULL); |
| 493 | } |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 494 | |
Kristian Høgsberg | 2aaad97 | 2007-03-07 12:12:47 -0500 | [diff] [blame] | 495 | return retval; |
Kristian Høgsberg | 1d3d52c | 2007-02-06 14:49:33 -0500 | [diff] [blame] | 496 | } |
| 497 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 498 | static void |
| 499 | complete_management_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) |
| 500 | { |
| 501 | struct sbp2_management_orb *orb = |
Jay Fenlason | 6f06148 | 2007-06-27 16:04:33 -0400 | [diff] [blame] | 502 | container_of(base_orb, struct sbp2_management_orb, base); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 503 | |
| 504 | if (status) |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 505 | memcpy(&orb->status, status, sizeof(*status)); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 506 | complete(&orb->done); |
| 507 | } |
| 508 | |
| 509 | static int |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 510 | sbp2_send_management_orb(struct sbp2_logical_unit *lu, int node_id, |
| 511 | int generation, int function, int lun_or_login_id, |
| 512 | void *response) |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 513 | { |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 514 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 515 | struct sbp2_management_orb *orb; |
Jarod Wilson | a4c379c | 2008-01-19 13:15:05 +0100 | [diff] [blame] | 516 | unsigned int timeout; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 517 | int retval = -ENOMEM; |
| 518 | |
Stefan Richter | be6f48b | 2008-01-27 19:14:44 +0100 | [diff] [blame] | 519 | if (function == SBP2_LOGOUT_REQUEST && fw_device_is_shutdown(device)) |
| 520 | return 0; |
| 521 | |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 522 | orb = kzalloc(sizeof(*orb), GFP_ATOMIC); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 523 | if (orb == NULL) |
| 524 | return -ENOMEM; |
| 525 | |
Kristian Høgsberg | e57d201 | 2007-08-24 18:59:58 -0400 | [diff] [blame] | 526 | kref_init(&orb->base.kref); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 527 | orb->response_bus = |
| 528 | dma_map_single(device->card->device, &orb->response, |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 529 | sizeof(orb->response), DMA_FROM_DEVICE); |
Kristian Høgsberg | 82eff9d | 2007-02-06 14:49:40 -0500 | [diff] [blame] | 530 | if (dma_mapping_error(orb->response_bus)) |
Stefan Richter | 7aa4848 | 2007-07-02 21:04:44 +0200 | [diff] [blame] | 531 | goto fail_mapping_response; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 532 | |
| 533 | orb->request.response.high = 0; |
| 534 | orb->request.response.low = orb->response_bus; |
| 535 | |
| 536 | orb->request.misc = |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 537 | MANAGEMENT_ORB_NOTIFY | |
| 538 | MANAGEMENT_ORB_FUNCTION(function) | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 539 | MANAGEMENT_ORB_LUN(lun_or_login_id); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 540 | orb->request.length = |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 541 | MANAGEMENT_ORB_RESPONSE_LENGTH(sizeof(orb->response)); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 542 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 543 | orb->request.status_fifo.high = lu->address_handler.offset >> 32; |
| 544 | orb->request.status_fifo.low = lu->address_handler.offset; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 545 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 546 | if (function == SBP2_LOGIN_REQUEST) { |
Stefan Richter | 14dc992 | 2008-01-20 01:25:31 +0100 | [diff] [blame] | 547 | /* Ask for 2^2 == 4 seconds reconnect grace period */ |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 548 | orb->request.misc |= |
Stefan Richter | 14dc992 | 2008-01-20 01:25:31 +0100 | [diff] [blame] | 549 | MANAGEMENT_ORB_RECONNECT(2) | |
| 550 | MANAGEMENT_ORB_EXCLUSIVE(sbp2_param_exclusive_login); |
Jarod Wilson | 384170d | 2008-01-25 23:31:12 -0500 | [diff] [blame] | 551 | timeout = lu->tgt->mgt_orb_timeout; |
Jarod Wilson | a4c379c | 2008-01-19 13:15:05 +0100 | [diff] [blame] | 552 | } else { |
| 553 | timeout = SBP2_ORB_TIMEOUT; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 554 | } |
| 555 | |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 556 | fw_memcpy_to_be32(&orb->request, &orb->request, sizeof(orb->request)); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 557 | |
| 558 | init_completion(&orb->done); |
| 559 | orb->base.callback = complete_management_orb; |
Kristian Høgsberg | 2aaad97 | 2007-03-07 12:12:47 -0500 | [diff] [blame] | 560 | |
Stefan Richter | 7aa4848 | 2007-07-02 21:04:44 +0200 | [diff] [blame] | 561 | orb->base.request_bus = |
| 562 | dma_map_single(device->card->device, &orb->request, |
| 563 | sizeof(orb->request), DMA_TO_DEVICE); |
| 564 | if (dma_mapping_error(orb->base.request_bus)) |
| 565 | goto fail_mapping_request; |
| 566 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 567 | sbp2_send_orb(&orb->base, lu, node_id, generation, |
| 568 | lu->tgt->management_agent_address); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 569 | |
Jarod Wilson | a4c379c | 2008-01-19 13:15:05 +0100 | [diff] [blame] | 570 | wait_for_completion_timeout(&orb->done, msecs_to_jiffies(timeout)); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 571 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 572 | retval = -EIO; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 573 | if (sbp2_cancel_orbs(lu) == 0) { |
Stefan Richter | 48f18c7 | 2008-02-03 23:09:50 +0100 | [diff] [blame] | 574 | fw_error("%s: orb reply timed out, rcode=0x%02x\n", |
| 575 | lu->tgt->bus_id, orb->base.rcode); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 576 | goto out; |
| 577 | } |
| 578 | |
Kristian Høgsberg | 2aaad97 | 2007-03-07 12:12:47 -0500 | [diff] [blame] | 579 | if (orb->base.rcode != RCODE_COMPLETE) { |
Stefan Richter | 48f18c7 | 2008-02-03 23:09:50 +0100 | [diff] [blame] | 580 | fw_error("%s: management write failed, rcode 0x%02x\n", |
| 581 | lu->tgt->bus_id, orb->base.rcode); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 582 | goto out; |
| 583 | } |
| 584 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 585 | if (STATUS_GET_RESPONSE(orb->status) != 0 || |
| 586 | STATUS_GET_SBP_STATUS(orb->status) != 0) { |
Stefan Richter | 48f18c7 | 2008-02-03 23:09:50 +0100 | [diff] [blame] | 587 | fw_error("%s: error status: %d:%d\n", lu->tgt->bus_id, |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 588 | STATUS_GET_RESPONSE(orb->status), |
| 589 | STATUS_GET_SBP_STATUS(orb->status)); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 590 | goto out; |
| 591 | } |
| 592 | |
| 593 | retval = 0; |
| 594 | out: |
| 595 | dma_unmap_single(device->card->device, orb->base.request_bus, |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 596 | sizeof(orb->request), DMA_TO_DEVICE); |
Stefan Richter | 7aa4848 | 2007-07-02 21:04:44 +0200 | [diff] [blame] | 597 | fail_mapping_request: |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 598 | dma_unmap_single(device->card->device, orb->response_bus, |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 599 | sizeof(orb->response), DMA_FROM_DEVICE); |
Stefan Richter | 7aa4848 | 2007-07-02 21:04:44 +0200 | [diff] [blame] | 600 | fail_mapping_response: |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 601 | if (response) |
| 602 | fw_memcpy_from_be32(response, |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 603 | orb->response, sizeof(orb->response)); |
Kristian Høgsberg | e57d201 | 2007-08-24 18:59:58 -0400 | [diff] [blame] | 604 | kref_put(&orb->base.kref, free_orb); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 605 | |
| 606 | return retval; |
| 607 | } |
| 608 | |
| 609 | static void |
| 610 | complete_agent_reset_write(struct fw_card *card, int rcode, |
Stefan Richter | e0e6021 | 2008-02-03 23:08:58 +0100 | [diff] [blame] | 611 | void *payload, size_t length, void *done) |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 612 | { |
Stefan Richter | e0e6021 | 2008-02-03 23:08:58 +0100 | [diff] [blame] | 613 | complete(done); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 614 | } |
| 615 | |
Stefan Richter | e0e6021 | 2008-02-03 23:08:58 +0100 | [diff] [blame] | 616 | static void sbp2_agent_reset(struct sbp2_logical_unit *lu) |
| 617 | { |
| 618 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); |
| 619 | DECLARE_COMPLETION_ONSTACK(done); |
| 620 | struct fw_transaction t; |
| 621 | static u32 z; |
| 622 | |
| 623 | fw_send_request(device->card, &t, TCODE_WRITE_QUADLET_REQUEST, |
| 624 | lu->tgt->node_id, lu->generation, device->max_speed, |
| 625 | lu->command_block_agent_address + SBP2_AGENT_RESET, |
| 626 | &z, sizeof(z), complete_agent_reset_write, &done); |
| 627 | wait_for_completion(&done); |
| 628 | } |
| 629 | |
| 630 | static void |
| 631 | complete_agent_reset_write_no_wait(struct fw_card *card, int rcode, |
| 632 | void *payload, size_t length, void *data) |
| 633 | { |
| 634 | kfree(data); |
| 635 | } |
| 636 | |
| 637 | static void sbp2_agent_reset_no_wait(struct sbp2_logical_unit *lu) |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 638 | { |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 639 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 640 | struct fw_transaction *t; |
Stefan Richter | e0e6021 | 2008-02-03 23:08:58 +0100 | [diff] [blame] | 641 | static u32 z; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 642 | |
Stefan Richter | e0e6021 | 2008-02-03 23:08:58 +0100 | [diff] [blame] | 643 | t = kmalloc(sizeof(*t), GFP_ATOMIC); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 644 | if (t == NULL) |
Stefan Richter | e0e6021 | 2008-02-03 23:08:58 +0100 | [diff] [blame] | 645 | return; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 646 | |
| 647 | fw_send_request(device->card, t, TCODE_WRITE_QUADLET_REQUEST, |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 648 | lu->tgt->node_id, lu->generation, device->max_speed, |
| 649 | lu->command_block_agent_address + SBP2_AGENT_RESET, |
Stefan Richter | e0e6021 | 2008-02-03 23:08:58 +0100 | [diff] [blame] | 650 | &z, sizeof(z), complete_agent_reset_write_no_wait, t); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 651 | } |
| 652 | |
Stefan Richter | 2e2705b | 2008-02-16 16:37:28 +0100 | [diff] [blame] | 653 | static void sbp2_set_generation(struct sbp2_logical_unit *lu, int generation) |
| 654 | { |
| 655 | struct fw_card *card = fw_device(lu->tgt->unit->device.parent)->card; |
| 656 | unsigned long flags; |
| 657 | |
| 658 | /* serialize with comparisons of lu->generation and card->generation */ |
| 659 | spin_lock_irqsave(&card->lock, flags); |
| 660 | lu->generation = generation; |
| 661 | spin_unlock_irqrestore(&card->lock, flags); |
| 662 | } |
| 663 | |
| 664 | static inline void sbp2_allow_block(struct sbp2_logical_unit *lu) |
| 665 | { |
| 666 | /* |
| 667 | * We may access dont_block without taking card->lock here: |
| 668 | * All callers of sbp2_allow_block() and all callers of sbp2_unblock() |
| 669 | * are currently serialized against each other. |
| 670 | * And a wrong result in sbp2_conditionally_block()'s access of |
| 671 | * dont_block is rather harmless, it simply misses its first chance. |
| 672 | */ |
| 673 | --lu->tgt->dont_block; |
| 674 | } |
| 675 | |
| 676 | /* |
| 677 | * Blocks lu->tgt if all of the following conditions are met: |
| 678 | * - Login, INQUIRY, and high-level SCSI setup of all of the target's |
| 679 | * logical units have been finished (indicated by dont_block == 0). |
| 680 | * - lu->generation is stale. |
| 681 | * |
| 682 | * Note, scsi_block_requests() must be called while holding card->lock, |
| 683 | * otherwise it might foil sbp2_[conditionally_]unblock()'s attempt to |
| 684 | * unblock the target. |
| 685 | */ |
| 686 | static void sbp2_conditionally_block(struct sbp2_logical_unit *lu) |
| 687 | { |
| 688 | struct sbp2_target *tgt = lu->tgt; |
| 689 | struct fw_card *card = fw_device(tgt->unit->device.parent)->card; |
| 690 | struct Scsi_Host *shost = |
| 691 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); |
| 692 | unsigned long flags; |
| 693 | |
| 694 | spin_lock_irqsave(&card->lock, flags); |
| 695 | if (!tgt->dont_block && !lu->blocked && |
| 696 | lu->generation != card->generation) { |
| 697 | lu->blocked = true; |
| 698 | if (++tgt->blocked == 1) { |
| 699 | scsi_block_requests(shost); |
| 700 | fw_notify("blocked %s\n", lu->tgt->bus_id); |
| 701 | } |
| 702 | } |
| 703 | spin_unlock_irqrestore(&card->lock, flags); |
| 704 | } |
| 705 | |
| 706 | /* |
| 707 | * Unblocks lu->tgt as soon as all its logical units can be unblocked. |
| 708 | * Note, it is harmless to run scsi_unblock_requests() outside the |
| 709 | * card->lock protected section. On the other hand, running it inside |
| 710 | * the section might clash with shost->host_lock. |
| 711 | */ |
| 712 | static void sbp2_conditionally_unblock(struct sbp2_logical_unit *lu) |
| 713 | { |
| 714 | struct sbp2_target *tgt = lu->tgt; |
| 715 | struct fw_card *card = fw_device(tgt->unit->device.parent)->card; |
| 716 | struct Scsi_Host *shost = |
| 717 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); |
| 718 | unsigned long flags; |
| 719 | bool unblock = false; |
| 720 | |
| 721 | spin_lock_irqsave(&card->lock, flags); |
| 722 | if (lu->blocked && lu->generation == card->generation) { |
| 723 | lu->blocked = false; |
| 724 | unblock = --tgt->blocked == 0; |
| 725 | } |
| 726 | spin_unlock_irqrestore(&card->lock, flags); |
| 727 | |
| 728 | if (unblock) { |
| 729 | scsi_unblock_requests(shost); |
| 730 | fw_notify("unblocked %s\n", lu->tgt->bus_id); |
| 731 | } |
| 732 | } |
| 733 | |
| 734 | /* |
| 735 | * Prevents future blocking of tgt and unblocks it. |
| 736 | * Note, it is harmless to run scsi_unblock_requests() outside the |
| 737 | * card->lock protected section. On the other hand, running it inside |
| 738 | * the section might clash with shost->host_lock. |
| 739 | */ |
| 740 | static void sbp2_unblock(struct sbp2_target *tgt) |
| 741 | { |
| 742 | struct fw_card *card = fw_device(tgt->unit->device.parent)->card; |
| 743 | struct Scsi_Host *shost = |
| 744 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); |
| 745 | unsigned long flags; |
| 746 | |
| 747 | spin_lock_irqsave(&card->lock, flags); |
| 748 | ++tgt->dont_block; |
| 749 | spin_unlock_irqrestore(&card->lock, flags); |
| 750 | |
| 751 | scsi_unblock_requests(shost); |
| 752 | } |
| 753 | |
Stefan Richter | f843615 | 2008-02-26 23:30:02 +0100 | [diff] [blame^] | 754 | static int sbp2_lun2int(u16 lun) |
| 755 | { |
| 756 | struct scsi_lun eight_bytes_lun; |
| 757 | |
| 758 | memset(&eight_bytes_lun, 0, sizeof(eight_bytes_lun)); |
| 759 | eight_bytes_lun.scsi_lun[0] = (lun >> 8) & 0xff; |
| 760 | eight_bytes_lun.scsi_lun[1] = lun & 0xff; |
| 761 | |
| 762 | return scsilun_to_int(&eight_bytes_lun); |
| 763 | } |
| 764 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 765 | static void sbp2_release_target(struct kref *kref) |
Kristian Høgsberg | b3d6e15 | 2007-03-14 17:34:58 -0400 | [diff] [blame] | 766 | { |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 767 | struct sbp2_target *tgt = container_of(kref, struct sbp2_target, kref); |
| 768 | struct sbp2_logical_unit *lu, *next; |
| 769 | struct Scsi_Host *shost = |
| 770 | container_of((void *)tgt, struct Scsi_Host, hostdata[0]); |
Stefan Richter | f843615 | 2008-02-26 23:30:02 +0100 | [diff] [blame^] | 771 | struct scsi_device *sdev; |
Kristian Høgsberg | b3d6e15 | 2007-03-14 17:34:58 -0400 | [diff] [blame] | 772 | |
Stefan Richter | 2e2705b | 2008-02-16 16:37:28 +0100 | [diff] [blame] | 773 | /* prevent deadlocks */ |
| 774 | sbp2_unblock(tgt); |
| 775 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 776 | list_for_each_entry_safe(lu, next, &tgt->lu_list, link) { |
Stefan Richter | f843615 | 2008-02-26 23:30:02 +0100 | [diff] [blame^] | 777 | sdev = scsi_device_lookup(shost, 0, 0, sbp2_lun2int(lu->lun)); |
| 778 | if (sdev) { |
| 779 | scsi_remove_device(sdev); |
| 780 | scsi_device_put(sdev); |
Stefan Richter | 33f1c6c | 2008-02-19 09:05:49 +0100 | [diff] [blame] | 781 | } |
Stefan Richter | be6f48b | 2008-01-27 19:14:44 +0100 | [diff] [blame] | 782 | sbp2_send_management_orb(lu, tgt->node_id, lu->generation, |
| 783 | SBP2_LOGOUT_REQUEST, lu->login_id, NULL); |
Stefan Richter | 4dccd02 | 2008-01-20 01:24:26 +0100 | [diff] [blame] | 784 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 785 | fw_core_remove_address_handler(&lu->address_handler); |
| 786 | list_del(&lu->link); |
| 787 | kfree(lu); |
| 788 | } |
| 789 | scsi_remove_host(shost); |
Stefan Richter | 48f18c7 | 2008-02-03 23:09:50 +0100 | [diff] [blame] | 790 | fw_notify("released %s\n", tgt->bus_id); |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 791 | |
| 792 | put_device(&tgt->unit->device); |
| 793 | scsi_host_put(shost); |
Kristian Høgsberg | b3d6e15 | 2007-03-14 17:34:58 -0400 | [diff] [blame] | 794 | } |
| 795 | |
Stefan Richter | df8ec24 | 2007-08-12 12:51:18 +0200 | [diff] [blame] | 796 | static struct workqueue_struct *sbp2_wq; |
| 797 | |
Stefan Richter | 285838e | 2007-11-07 01:12:51 +0100 | [diff] [blame] | 798 | /* |
| 799 | * Always get the target's kref when scheduling work on one its units. |
| 800 | * Each workqueue job is responsible to call sbp2_target_put() upon return. |
| 801 | */ |
| 802 | static void sbp2_queue_work(struct sbp2_logical_unit *lu, unsigned long delay) |
| 803 | { |
| 804 | if (queue_delayed_work(sbp2_wq, &lu->work, delay)) |
| 805 | kref_get(&lu->tgt->kref); |
| 806 | } |
| 807 | |
| 808 | static void sbp2_target_put(struct sbp2_target *tgt) |
| 809 | { |
| 810 | kref_put(&tgt->kref, sbp2_release_target); |
| 811 | } |
| 812 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 813 | static void sbp2_reconnect(struct work_struct *work); |
| 814 | |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 815 | static void sbp2_login(struct work_struct *work) |
| 816 | { |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 817 | struct sbp2_logical_unit *lu = |
| 818 | container_of(work, struct sbp2_logical_unit, work.work); |
Stefan Richter | 48f18c7 | 2008-02-03 23:09:50 +0100 | [diff] [blame] | 819 | struct sbp2_target *tgt = lu->tgt; |
| 820 | struct fw_device *device = fw_device(tgt->unit->device.parent); |
| 821 | struct Scsi_Host *shost; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 822 | struct scsi_device *sdev; |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 823 | struct sbp2_login_response response; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 824 | int generation, node_id, local_node_id; |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 825 | |
Stefan Richter | be6f48b | 2008-01-27 19:14:44 +0100 | [diff] [blame] | 826 | if (fw_device_is_shutdown(device)) |
| 827 | goto out; |
| 828 | |
Stefan Richter | 5a8a1bc | 2008-01-24 01:53:19 +0100 | [diff] [blame] | 829 | generation = device->generation; |
Stefan Richter | b5d2a5e | 2008-01-25 18:57:41 +0100 | [diff] [blame] | 830 | smp_rmb(); /* node_id must not be older than generation */ |
Stefan Richter | 5a8a1bc | 2008-01-24 01:53:19 +0100 | [diff] [blame] | 831 | node_id = device->node_id; |
| 832 | local_node_id = device->card->node_id; |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 833 | |
Stefan Richter | ce896d9 | 2008-02-03 23:11:39 +0100 | [diff] [blame] | 834 | /* If this is a re-login attempt, log out, or we might be rejected. */ |
Stefan Richter | f843615 | 2008-02-26 23:30:02 +0100 | [diff] [blame^] | 835 | if (lu->has_sdev) |
Stefan Richter | ce896d9 | 2008-02-03 23:11:39 +0100 | [diff] [blame] | 836 | sbp2_send_management_orb(lu, device->node_id, generation, |
| 837 | SBP2_LOGOUT_REQUEST, lu->login_id, NULL); |
| 838 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 839 | if (sbp2_send_management_orb(lu, node_id, generation, |
| 840 | SBP2_LOGIN_REQUEST, lu->lun, &response) < 0) { |
Stefan Richter | 2e2705b | 2008-02-16 16:37:28 +0100 | [diff] [blame] | 841 | if (lu->retries++ < 5) { |
Stefan Richter | 285838e | 2007-11-07 01:12:51 +0100 | [diff] [blame] | 842 | sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5)); |
Stefan Richter | 2e2705b | 2008-02-16 16:37:28 +0100 | [diff] [blame] | 843 | } else { |
Stefan Richter | 48f18c7 | 2008-02-03 23:09:50 +0100 | [diff] [blame] | 844 | fw_error("%s: failed to login to LUN %04x\n", |
| 845 | tgt->bus_id, lu->lun); |
Stefan Richter | 2e2705b | 2008-02-16 16:37:28 +0100 | [diff] [blame] | 846 | /* Let any waiting I/O fail from now on. */ |
| 847 | sbp2_unblock(lu->tgt); |
| 848 | } |
Stefan Richter | 285838e | 2007-11-07 01:12:51 +0100 | [diff] [blame] | 849 | goto out; |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 850 | } |
| 851 | |
Stefan Richter | 48f18c7 | 2008-02-03 23:09:50 +0100 | [diff] [blame] | 852 | tgt->node_id = node_id; |
| 853 | tgt->address_high = local_node_id << 16; |
Stefan Richter | 2e2705b | 2008-02-16 16:37:28 +0100 | [diff] [blame] | 854 | sbp2_set_generation(lu, generation); |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 855 | |
| 856 | /* Get command block agent offset and login id. */ |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 857 | lu->command_block_agent_address = |
Kristian Høgsberg | 5c5539d | 2007-03-07 12:12:45 -0500 | [diff] [blame] | 858 | ((u64) (response.command_block_agent.high & 0xffff) << 32) | |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 859 | response.command_block_agent.low; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 860 | lu->login_id = LOGIN_RESPONSE_GET_LOGIN_ID(response); |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 861 | |
Stefan Richter | 48f18c7 | 2008-02-03 23:09:50 +0100 | [diff] [blame] | 862 | fw_notify("%s: logged in to LUN %04x (%d retries)\n", |
| 863 | tgt->bus_id, lu->lun, lu->retries); |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 864 | |
| 865 | #if 0 |
| 866 | /* FIXME: The linux1394 sbp2 does this last step. */ |
| 867 | sbp2_set_busy_timeout(scsi_id); |
| 868 | #endif |
| 869 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 870 | PREPARE_DELAYED_WORK(&lu->work, sbp2_reconnect); |
| 871 | sbp2_agent_reset(lu); |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 872 | |
Stefan Richter | 0fa6dfd | 2008-02-03 23:10:47 +0100 | [diff] [blame] | 873 | /* This was a re-login. */ |
Stefan Richter | f843615 | 2008-02-26 23:30:02 +0100 | [diff] [blame^] | 874 | if (lu->has_sdev) { |
Stefan Richter | 0fa6dfd | 2008-02-03 23:10:47 +0100 | [diff] [blame] | 875 | sbp2_cancel_orbs(lu); |
Stefan Richter | 2e2705b | 2008-02-16 16:37:28 +0100 | [diff] [blame] | 876 | sbp2_conditionally_unblock(lu); |
Stefan Richter | 0fa6dfd | 2008-02-03 23:10:47 +0100 | [diff] [blame] | 877 | goto out; |
| 878 | } |
| 879 | |
Stefan Richter | 9220f19 | 2008-02-03 23:04:38 +0100 | [diff] [blame] | 880 | if (lu->tgt->workarounds & SBP2_WORKAROUND_DELAY_INQUIRY) |
| 881 | ssleep(SBP2_INQUIRY_DELAY); |
| 882 | |
Stefan Richter | 48f18c7 | 2008-02-03 23:09:50 +0100 | [diff] [blame] | 883 | shost = container_of((void *)tgt, struct Scsi_Host, hostdata[0]); |
Stefan Richter | f843615 | 2008-02-26 23:30:02 +0100 | [diff] [blame^] | 884 | sdev = __scsi_add_device(shost, 0, 0, sbp2_lun2int(lu->lun), lu); |
Stefan Richter | e80de37 | 2008-02-15 21:29:02 +0100 | [diff] [blame] | 885 | /* |
| 886 | * FIXME: We are unable to perform reconnects while in sbp2_login(). |
| 887 | * Therefore __scsi_add_device() will get into trouble if a bus reset |
| 888 | * happens in parallel. It will either fail or leave us with an |
| 889 | * unusable sdev. As a workaround we check for this and retry the |
| 890 | * whole login and SCSI probing. |
| 891 | */ |
Stefan Richter | 1b9c12b | 2008-01-26 17:43:23 +0100 | [diff] [blame] | 892 | |
Stefan Richter | e80de37 | 2008-02-15 21:29:02 +0100 | [diff] [blame] | 893 | /* Reported error during __scsi_add_device() */ |
| 894 | if (IS_ERR(sdev)) |
| 895 | goto out_logout_login; |
| 896 | |
Stefan Richter | e80de37 | 2008-02-15 21:29:02 +0100 | [diff] [blame] | 897 | /* Unreported error during __scsi_add_device() */ |
| 898 | smp_rmb(); /* get current card generation */ |
| 899 | if (generation != device->card->generation) { |
| 900 | scsi_remove_device(sdev); |
Stefan Richter | 33f1c6c | 2008-02-19 09:05:49 +0100 | [diff] [blame] | 901 | scsi_device_put(sdev); |
Stefan Richter | e80de37 | 2008-02-15 21:29:02 +0100 | [diff] [blame] | 902 | goto out_logout_login; |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 903 | } |
Stefan Richter | e80de37 | 2008-02-15 21:29:02 +0100 | [diff] [blame] | 904 | |
| 905 | /* No error during __scsi_add_device() */ |
Stefan Richter | f843615 | 2008-02-26 23:30:02 +0100 | [diff] [blame^] | 906 | lu->has_sdev = true; |
| 907 | scsi_device_put(sdev); |
Stefan Richter | 2e2705b | 2008-02-16 16:37:28 +0100 | [diff] [blame] | 908 | sbp2_allow_block(lu); |
Stefan Richter | e80de37 | 2008-02-15 21:29:02 +0100 | [diff] [blame] | 909 | goto out; |
| 910 | |
| 911 | out_logout_login: |
| 912 | smp_rmb(); /* generation may have changed */ |
| 913 | generation = device->generation; |
| 914 | smp_rmb(); /* node_id must not be older than generation */ |
| 915 | |
| 916 | sbp2_send_management_orb(lu, device->node_id, generation, |
| 917 | SBP2_LOGOUT_REQUEST, lu->login_id, NULL); |
| 918 | /* |
| 919 | * If a bus reset happened, sbp2_update will have requeued |
| 920 | * lu->work already. Reset the work from reconnect to login. |
| 921 | */ |
| 922 | PREPARE_DELAYED_WORK(&lu->work, sbp2_login); |
Stefan Richter | 285838e | 2007-11-07 01:12:51 +0100 | [diff] [blame] | 923 | out: |
Stefan Richter | 48f18c7 | 2008-02-03 23:09:50 +0100 | [diff] [blame] | 924 | sbp2_target_put(tgt); |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 925 | } |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 926 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 927 | static int sbp2_add_logical_unit(struct sbp2_target *tgt, int lun_entry) |
| 928 | { |
| 929 | struct sbp2_logical_unit *lu; |
| 930 | |
| 931 | lu = kmalloc(sizeof(*lu), GFP_KERNEL); |
| 932 | if (!lu) |
| 933 | return -ENOMEM; |
| 934 | |
| 935 | lu->address_handler.length = 0x100; |
| 936 | lu->address_handler.address_callback = sbp2_status_write; |
| 937 | lu->address_handler.callback_data = lu; |
| 938 | |
| 939 | if (fw_core_add_address_handler(&lu->address_handler, |
| 940 | &fw_high_memory_region) < 0) { |
| 941 | kfree(lu); |
| 942 | return -ENOMEM; |
| 943 | } |
| 944 | |
Stefan Richter | f843615 | 2008-02-26 23:30:02 +0100 | [diff] [blame^] | 945 | lu->tgt = tgt; |
| 946 | lu->lun = lun_entry & 0xffff; |
| 947 | lu->retries = 0; |
| 948 | lu->has_sdev = false; |
| 949 | lu->blocked = false; |
Stefan Richter | 2e2705b | 2008-02-16 16:37:28 +0100 | [diff] [blame] | 950 | ++tgt->dont_block; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 951 | INIT_LIST_HEAD(&lu->orb_list); |
| 952 | INIT_DELAYED_WORK(&lu->work, sbp2_login); |
| 953 | |
| 954 | list_add_tail(&lu->link, &tgt->lu_list); |
| 955 | return 0; |
| 956 | } |
| 957 | |
| 958 | static int sbp2_scan_logical_unit_dir(struct sbp2_target *tgt, u32 *directory) |
| 959 | { |
| 960 | struct fw_csr_iterator ci; |
| 961 | int key, value; |
| 962 | |
| 963 | fw_csr_iterator_init(&ci, directory); |
| 964 | while (fw_csr_iterator_next(&ci, &key, &value)) |
| 965 | if (key == SBP2_CSR_LOGICAL_UNIT_NUMBER && |
| 966 | sbp2_add_logical_unit(tgt, value) < 0) |
| 967 | return -ENOMEM; |
| 968 | return 0; |
| 969 | } |
| 970 | |
| 971 | static int sbp2_scan_unit_dir(struct sbp2_target *tgt, u32 *directory, |
| 972 | u32 *model, u32 *firmware_revision) |
| 973 | { |
| 974 | struct fw_csr_iterator ci; |
| 975 | int key, value; |
Jarod Wilson | 384170d | 2008-01-25 23:31:12 -0500 | [diff] [blame] | 976 | unsigned int timeout; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 977 | |
| 978 | fw_csr_iterator_init(&ci, directory); |
| 979 | while (fw_csr_iterator_next(&ci, &key, &value)) { |
| 980 | switch (key) { |
| 981 | |
| 982 | case CSR_DEPENDENT_INFO | CSR_OFFSET: |
| 983 | tgt->management_agent_address = |
| 984 | CSR_REGISTER_BASE + 4 * value; |
| 985 | break; |
| 986 | |
| 987 | case CSR_DIRECTORY_ID: |
| 988 | tgt->directory_id = value; |
| 989 | break; |
| 990 | |
| 991 | case CSR_MODEL: |
| 992 | *model = value; |
| 993 | break; |
| 994 | |
| 995 | case SBP2_CSR_FIRMWARE_REVISION: |
| 996 | *firmware_revision = value; |
| 997 | break; |
| 998 | |
Jarod Wilson | 384170d | 2008-01-25 23:31:12 -0500 | [diff] [blame] | 999 | case SBP2_CSR_UNIT_CHARACTERISTICS: |
| 1000 | /* the timeout value is stored in 500ms units */ |
| 1001 | timeout = ((unsigned int) value >> 8 & 0xff) * 500; |
| 1002 | timeout = max(timeout, SBP2_MIN_LOGIN_ORB_TIMEOUT); |
| 1003 | tgt->mgt_orb_timeout = |
| 1004 | min(timeout, SBP2_MAX_LOGIN_ORB_TIMEOUT); |
| 1005 | |
| 1006 | if (timeout > tgt->mgt_orb_timeout) |
| 1007 | fw_notify("%s: config rom contains %ds " |
| 1008 | "management ORB timeout, limiting " |
Stefan Richter | 48f18c7 | 2008-02-03 23:09:50 +0100 | [diff] [blame] | 1009 | "to %ds\n", tgt->bus_id, |
Jarod Wilson | 384170d | 2008-01-25 23:31:12 -0500 | [diff] [blame] | 1010 | timeout / 1000, |
| 1011 | tgt->mgt_orb_timeout / 1000); |
| 1012 | break; |
| 1013 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1014 | case SBP2_CSR_LOGICAL_UNIT_NUMBER: |
| 1015 | if (sbp2_add_logical_unit(tgt, value) < 0) |
| 1016 | return -ENOMEM; |
| 1017 | break; |
| 1018 | |
| 1019 | case SBP2_CSR_LOGICAL_UNIT_DIRECTORY: |
| 1020 | if (sbp2_scan_logical_unit_dir(tgt, ci.p + value) < 0) |
| 1021 | return -ENOMEM; |
| 1022 | break; |
| 1023 | } |
| 1024 | } |
| 1025 | return 0; |
| 1026 | } |
| 1027 | |
| 1028 | static void sbp2_init_workarounds(struct sbp2_target *tgt, u32 model, |
| 1029 | u32 firmware_revision) |
| 1030 | { |
| 1031 | int i; |
Stefan Richter | 05cca73 | 2008-01-26 17:42:45 +0100 | [diff] [blame] | 1032 | unsigned int w = sbp2_param_workarounds; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1033 | |
Stefan Richter | 2df222b | 2007-08-13 17:48:25 +0200 | [diff] [blame] | 1034 | if (w) |
| 1035 | fw_notify("Please notify linux1394-devel@lists.sourceforge.net " |
| 1036 | "if you need the workarounds parameter for %s\n", |
Stefan Richter | 48f18c7 | 2008-02-03 23:09:50 +0100 | [diff] [blame] | 1037 | tgt->bus_id); |
Stefan Richter | 2df222b | 2007-08-13 17:48:25 +0200 | [diff] [blame] | 1038 | |
| 1039 | if (w & SBP2_WORKAROUND_OVERRIDE) |
| 1040 | goto out; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1041 | |
| 1042 | for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { |
| 1043 | |
| 1044 | if (sbp2_workarounds_table[i].firmware_revision != |
| 1045 | (firmware_revision & 0xffffff00)) |
| 1046 | continue; |
| 1047 | |
| 1048 | if (sbp2_workarounds_table[i].model != model && |
| 1049 | sbp2_workarounds_table[i].model != ~0) |
| 1050 | continue; |
| 1051 | |
Stefan Richter | 2df222b | 2007-08-13 17:48:25 +0200 | [diff] [blame] | 1052 | w |= sbp2_workarounds_table[i].workarounds; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1053 | break; |
| 1054 | } |
Stefan Richter | 2df222b | 2007-08-13 17:48:25 +0200 | [diff] [blame] | 1055 | out: |
| 1056 | if (w) |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1057 | fw_notify("Workarounds for %s: 0x%x " |
| 1058 | "(firmware_revision 0x%06x, model_id 0x%06x)\n", |
Stefan Richter | 48f18c7 | 2008-02-03 23:09:50 +0100 | [diff] [blame] | 1059 | tgt->bus_id, w, firmware_revision, model); |
Stefan Richter | 2df222b | 2007-08-13 17:48:25 +0200 | [diff] [blame] | 1060 | tgt->workarounds = w; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1061 | } |
| 1062 | |
| 1063 | static struct scsi_host_template scsi_driver_template; |
| 1064 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1065 | static int sbp2_probe(struct device *dev) |
| 1066 | { |
| 1067 | struct fw_unit *unit = fw_unit(dev); |
| 1068 | struct fw_device *device = fw_device(unit->device.parent); |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1069 | struct sbp2_target *tgt; |
| 1070 | struct sbp2_logical_unit *lu; |
| 1071 | struct Scsi_Host *shost; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1072 | u32 model, firmware_revision; |
| 1073 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1074 | shost = scsi_host_alloc(&scsi_driver_template, sizeof(*tgt)); |
| 1075 | if (shost == NULL) |
| 1076 | return -ENOMEM; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1077 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1078 | tgt = (struct sbp2_target *)shost->hostdata; |
| 1079 | unit->device.driver_data = tgt; |
| 1080 | tgt->unit = unit; |
| 1081 | kref_init(&tgt->kref); |
| 1082 | INIT_LIST_HEAD(&tgt->lu_list); |
Stefan Richter | 48f18c7 | 2008-02-03 23:09:50 +0100 | [diff] [blame] | 1083 | tgt->bus_id = unit->device.bus_id; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1084 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1085 | if (fw_device_enable_phys_dma(device) < 0) |
| 1086 | goto fail_shost_put; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1087 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1088 | if (scsi_add_host(shost, &unit->device) < 0) |
| 1089 | goto fail_shost_put; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1090 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1091 | /* Initialize to values that won't match anything in our table. */ |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1092 | firmware_revision = 0xff000000; |
| 1093 | model = 0xff000000; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1094 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1095 | /* implicit directory ID */ |
| 1096 | tgt->directory_id = ((unit->directory - device->config_rom) * 4 |
| 1097 | + CSR_CONFIG_ROM) & 0xffffff; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1098 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1099 | if (sbp2_scan_unit_dir(tgt, unit->directory, &model, |
| 1100 | &firmware_revision) < 0) |
| 1101 | goto fail_tgt_put; |
| 1102 | |
| 1103 | sbp2_init_workarounds(tgt, model, firmware_revision); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1104 | |
Kristian Høgsberg | b3d6e15 | 2007-03-14 17:34:58 -0400 | [diff] [blame] | 1105 | get_device(&unit->device); |
| 1106 | |
Stefan Richter | 285838e | 2007-11-07 01:12:51 +0100 | [diff] [blame] | 1107 | /* Do the login in a workqueue so we can easily reschedule retries. */ |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1108 | list_for_each_entry(lu, &tgt->lu_list, link) |
Stefan Richter | 285838e | 2007-11-07 01:12:51 +0100 | [diff] [blame] | 1109 | sbp2_queue_work(lu, 0); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1110 | return 0; |
Kristian Høgsberg | ad85274 | 2007-05-09 19:23:07 -0400 | [diff] [blame] | 1111 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1112 | fail_tgt_put: |
Stefan Richter | 285838e | 2007-11-07 01:12:51 +0100 | [diff] [blame] | 1113 | sbp2_target_put(tgt); |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1114 | return -ENOMEM; |
| 1115 | |
| 1116 | fail_shost_put: |
| 1117 | scsi_host_put(shost); |
| 1118 | return -ENOMEM; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1119 | } |
| 1120 | |
| 1121 | static int sbp2_remove(struct device *dev) |
| 1122 | { |
| 1123 | struct fw_unit *unit = fw_unit(dev); |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1124 | struct sbp2_target *tgt = unit->device.driver_data; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1125 | |
Stefan Richter | 285838e | 2007-11-07 01:12:51 +0100 | [diff] [blame] | 1126 | sbp2_target_put(tgt); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1127 | return 0; |
| 1128 | } |
| 1129 | |
| 1130 | static void sbp2_reconnect(struct work_struct *work) |
| 1131 | { |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1132 | struct sbp2_logical_unit *lu = |
| 1133 | container_of(work, struct sbp2_logical_unit, work.work); |
Stefan Richter | 48f18c7 | 2008-02-03 23:09:50 +0100 | [diff] [blame] | 1134 | struct sbp2_target *tgt = lu->tgt; |
| 1135 | struct fw_device *device = fw_device(tgt->unit->device.parent); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1136 | int generation, node_id, local_node_id; |
| 1137 | |
Stefan Richter | be6f48b | 2008-01-27 19:14:44 +0100 | [diff] [blame] | 1138 | if (fw_device_is_shutdown(device)) |
| 1139 | goto out; |
| 1140 | |
Stefan Richter | 5a8a1bc | 2008-01-24 01:53:19 +0100 | [diff] [blame] | 1141 | generation = device->generation; |
Stefan Richter | b5d2a5e | 2008-01-25 18:57:41 +0100 | [diff] [blame] | 1142 | smp_rmb(); /* node_id must not be older than generation */ |
Stefan Richter | 5a8a1bc | 2008-01-24 01:53:19 +0100 | [diff] [blame] | 1143 | node_id = device->node_id; |
| 1144 | local_node_id = device->card->node_id; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1145 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1146 | if (sbp2_send_management_orb(lu, node_id, generation, |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 1147 | SBP2_RECONNECT_REQUEST, |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1148 | lu->login_id, NULL) < 0) { |
Stefan Richter | ce896d9 | 2008-02-03 23:11:39 +0100 | [diff] [blame] | 1149 | /* |
| 1150 | * If reconnect was impossible even though we are in the |
| 1151 | * current generation, fall back and try to log in again. |
| 1152 | * |
| 1153 | * We could check for "Function rejected" status, but |
| 1154 | * looking at the bus generation as simpler and more general. |
| 1155 | */ |
| 1156 | smp_rmb(); /* get current card generation */ |
| 1157 | if (generation == device->card->generation || |
| 1158 | lu->retries++ >= 5) { |
Stefan Richter | 48f18c7 | 2008-02-03 23:09:50 +0100 | [diff] [blame] | 1159 | fw_error("%s: failed to reconnect\n", tgt->bus_id); |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1160 | lu->retries = 0; |
| 1161 | PREPARE_DELAYED_WORK(&lu->work, sbp2_login); |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 1162 | } |
Stefan Richter | 285838e | 2007-11-07 01:12:51 +0100 | [diff] [blame] | 1163 | sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5)); |
| 1164 | goto out; |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 1165 | } |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1166 | |
Stefan Richter | 48f18c7 | 2008-02-03 23:09:50 +0100 | [diff] [blame] | 1167 | tgt->node_id = node_id; |
| 1168 | tgt->address_high = local_node_id << 16; |
Stefan Richter | 2e2705b | 2008-02-16 16:37:28 +0100 | [diff] [blame] | 1169 | sbp2_set_generation(lu, generation); |
Kristian Høgsberg | 7f37c42 | 2007-02-06 14:49:34 -0500 | [diff] [blame] | 1170 | |
Stefan Richter | 48f18c7 | 2008-02-03 23:09:50 +0100 | [diff] [blame] | 1171 | fw_notify("%s: reconnected to LUN %04x (%d retries)\n", |
| 1172 | tgt->bus_id, lu->lun, lu->retries); |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1173 | |
| 1174 | sbp2_agent_reset(lu); |
| 1175 | sbp2_cancel_orbs(lu); |
Stefan Richter | 2e2705b | 2008-02-16 16:37:28 +0100 | [diff] [blame] | 1176 | sbp2_conditionally_unblock(lu); |
Stefan Richter | 285838e | 2007-11-07 01:12:51 +0100 | [diff] [blame] | 1177 | out: |
Stefan Richter | 48f18c7 | 2008-02-03 23:09:50 +0100 | [diff] [blame] | 1178 | sbp2_target_put(tgt); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1179 | } |
| 1180 | |
| 1181 | static void sbp2_update(struct fw_unit *unit) |
| 1182 | { |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1183 | struct sbp2_target *tgt = unit->device.driver_data; |
| 1184 | struct sbp2_logical_unit *lu; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1185 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1186 | fw_device_enable_phys_dma(fw_device(unit->device.parent)); |
| 1187 | |
| 1188 | /* |
| 1189 | * Fw-core serializes sbp2_update() against sbp2_remove(). |
| 1190 | * Iteration over tgt->lu_list is therefore safe here. |
| 1191 | */ |
| 1192 | list_for_each_entry(lu, &tgt->lu_list, link) { |
Stefan Richter | 2e2705b | 2008-02-16 16:37:28 +0100 | [diff] [blame] | 1193 | sbp2_conditionally_block(lu); |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1194 | lu->retries = 0; |
Stefan Richter | 285838e | 2007-11-07 01:12:51 +0100 | [diff] [blame] | 1195 | sbp2_queue_work(lu, 0); |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1196 | } |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1197 | } |
| 1198 | |
| 1199 | #define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e |
| 1200 | #define SBP2_SW_VERSION_ENTRY 0x00010483 |
| 1201 | |
Stefan Richter | 21ebcd1 | 2007-01-14 15:29:07 +0100 | [diff] [blame] | 1202 | static const struct fw_device_id sbp2_id_table[] = { |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1203 | { |
| 1204 | .match_flags = FW_MATCH_SPECIFIER_ID | FW_MATCH_VERSION, |
| 1205 | .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY, |
Stefan Richter | 5af4e5e | 2007-01-21 20:45:32 +0100 | [diff] [blame] | 1206 | .version = SBP2_SW_VERSION_ENTRY, |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1207 | }, |
| 1208 | { } |
| 1209 | }; |
| 1210 | |
| 1211 | static struct fw_driver sbp2_driver = { |
| 1212 | .driver = { |
| 1213 | .owner = THIS_MODULE, |
| 1214 | .name = sbp2_driver_name, |
| 1215 | .bus = &fw_bus_type, |
| 1216 | .probe = sbp2_probe, |
| 1217 | .remove = sbp2_remove, |
| 1218 | }, |
| 1219 | .update = sbp2_update, |
| 1220 | .id_table = sbp2_id_table, |
| 1221 | }; |
| 1222 | |
Kristian Høgsberg | fbb5423 | 2007-04-10 18:11:18 -0400 | [diff] [blame] | 1223 | static unsigned int |
| 1224 | sbp2_status_to_sense_data(u8 *sbp2_status, u8 *sense_data) |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1225 | { |
Kristian Høgsberg | fbb5423 | 2007-04-10 18:11:18 -0400 | [diff] [blame] | 1226 | int sam_status; |
| 1227 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1228 | sense_data[0] = 0x70; |
| 1229 | sense_data[1] = 0x0; |
| 1230 | sense_data[2] = sbp2_status[1]; |
| 1231 | sense_data[3] = sbp2_status[4]; |
| 1232 | sense_data[4] = sbp2_status[5]; |
| 1233 | sense_data[5] = sbp2_status[6]; |
| 1234 | sense_data[6] = sbp2_status[7]; |
| 1235 | sense_data[7] = 10; |
| 1236 | sense_data[8] = sbp2_status[8]; |
| 1237 | sense_data[9] = sbp2_status[9]; |
| 1238 | sense_data[10] = sbp2_status[10]; |
| 1239 | sense_data[11] = sbp2_status[11]; |
| 1240 | sense_data[12] = sbp2_status[2]; |
| 1241 | sense_data[13] = sbp2_status[3]; |
| 1242 | sense_data[14] = sbp2_status[12]; |
| 1243 | sense_data[15] = sbp2_status[13]; |
| 1244 | |
Kristian Høgsberg | fbb5423 | 2007-04-10 18:11:18 -0400 | [diff] [blame] | 1245 | sam_status = sbp2_status[0] & 0x3f; |
| 1246 | |
| 1247 | switch (sam_status) { |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1248 | case SAM_STAT_GOOD: |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1249 | case SAM_STAT_CHECK_CONDITION: |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1250 | case SAM_STAT_CONDITION_MET: |
Kristian Høgsberg | fbb5423 | 2007-04-10 18:11:18 -0400 | [diff] [blame] | 1251 | case SAM_STAT_BUSY: |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1252 | case SAM_STAT_RESERVATION_CONFLICT: |
| 1253 | case SAM_STAT_COMMAND_TERMINATED: |
Kristian Høgsberg | fbb5423 | 2007-04-10 18:11:18 -0400 | [diff] [blame] | 1254 | return DID_OK << 16 | sam_status; |
| 1255 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1256 | default: |
Kristian Høgsberg | fbb5423 | 2007-04-10 18:11:18 -0400 | [diff] [blame] | 1257 | return DID_ERROR << 16; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1258 | } |
| 1259 | } |
| 1260 | |
| 1261 | static void |
| 1262 | complete_command_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) |
| 1263 | { |
Jay Fenlason | 6f06148 | 2007-06-27 16:04:33 -0400 | [diff] [blame] | 1264 | struct sbp2_command_orb *orb = |
| 1265 | container_of(base_orb, struct sbp2_command_orb, base); |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1266 | struct fw_device *device = fw_device(orb->lu->tgt->unit->device.parent); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1267 | int result; |
| 1268 | |
| 1269 | if (status != NULL) { |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 1270 | if (STATUS_GET_DEAD(*status)) |
Stefan Richter | e0e6021 | 2008-02-03 23:08:58 +0100 | [diff] [blame] | 1271 | sbp2_agent_reset_no_wait(orb->lu); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1272 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 1273 | switch (STATUS_GET_RESPONSE(*status)) { |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1274 | case SBP2_STATUS_REQUEST_COMPLETE: |
Kristian Høgsberg | fbb5423 | 2007-04-10 18:11:18 -0400 | [diff] [blame] | 1275 | result = DID_OK << 16; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1276 | break; |
| 1277 | case SBP2_STATUS_TRANSPORT_FAILURE: |
Kristian Høgsberg | fbb5423 | 2007-04-10 18:11:18 -0400 | [diff] [blame] | 1278 | result = DID_BUS_BUSY << 16; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1279 | break; |
| 1280 | case SBP2_STATUS_ILLEGAL_REQUEST: |
| 1281 | case SBP2_STATUS_VENDOR_DEPENDENT: |
| 1282 | default: |
Kristian Høgsberg | fbb5423 | 2007-04-10 18:11:18 -0400 | [diff] [blame] | 1283 | result = DID_ERROR << 16; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1284 | break; |
| 1285 | } |
| 1286 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 1287 | if (result == DID_OK << 16 && STATUS_GET_LEN(*status) > 1) |
| 1288 | result = sbp2_status_to_sense_data(STATUS_GET_DATA(*status), |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1289 | orb->cmd->sense_buffer); |
| 1290 | } else { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1291 | /* |
| 1292 | * If the orb completes with status == NULL, something |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1293 | * went wrong, typically a bus reset happened mid-orb |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1294 | * or when sending the write (less likely). |
| 1295 | */ |
Kristian Høgsberg | fbb5423 | 2007-04-10 18:11:18 -0400 | [diff] [blame] | 1296 | result = DID_BUS_BUSY << 16; |
Stefan Richter | 2e2705b | 2008-02-16 16:37:28 +0100 | [diff] [blame] | 1297 | sbp2_conditionally_block(orb->lu); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1298 | } |
| 1299 | |
| 1300 | dma_unmap_single(device->card->device, orb->base.request_bus, |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 1301 | sizeof(orb->request), DMA_TO_DEVICE); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1302 | |
Stefan Richter | 412edf6 | 2007-07-16 21:05:41 +0200 | [diff] [blame] | 1303 | if (scsi_sg_count(orb->cmd) > 0) |
| 1304 | dma_unmap_sg(device->card->device, scsi_sglist(orb->cmd), |
| 1305 | scsi_sg_count(orb->cmd), |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1306 | orb->cmd->sc_data_direction); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1307 | |
| 1308 | if (orb->page_table_bus != 0) |
| 1309 | dma_unmap_single(device->card->device, orb->page_table_bus, |
Stefan Richter | b4be016 | 2007-07-02 22:07:34 +0200 | [diff] [blame] | 1310 | sizeof(orb->page_table), DMA_TO_DEVICE); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1311 | |
Kristian Høgsberg | fbb5423 | 2007-04-10 18:11:18 -0400 | [diff] [blame] | 1312 | orb->cmd->result = result; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1313 | orb->done(orb->cmd); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1314 | } |
| 1315 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1316 | static int |
| 1317 | sbp2_map_scatterlist(struct sbp2_command_orb *orb, struct fw_device *device, |
| 1318 | struct sbp2_logical_unit *lu) |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1319 | { |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1320 | struct scatterlist *sg; |
| 1321 | int sg_len, l, i, j, count; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1322 | dma_addr_t sg_addr; |
| 1323 | |
Stefan Richter | 412edf6 | 2007-07-16 21:05:41 +0200 | [diff] [blame] | 1324 | sg = scsi_sglist(orb->cmd); |
| 1325 | 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] | 1326 | orb->cmd->sc_data_direction); |
Kristian Høgsberg | 95ffc5e | 2007-05-09 19:23:08 -0400 | [diff] [blame] | 1327 | if (count == 0) |
| 1328 | goto fail; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1329 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1330 | /* |
| 1331 | * Handle the special case where there is only one element in |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1332 | * the scatter list by converting it to an immediate block |
| 1333 | * request. This is also a workaround for broken devices such |
| 1334 | * as the second generation iPod which doesn't support page |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1335 | * tables. |
| 1336 | */ |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1337 | if (count == 1 && sg_dma_len(sg) < SBP2_MAX_SG_ELEMENT_LENGTH) { |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1338 | orb->request.data_descriptor.high = lu->tgt->address_high; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1339 | orb->request.data_descriptor.low = sg_dma_address(sg); |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1340 | orb->request.misc |= COMMAND_ORB_DATA_SIZE(sg_dma_len(sg)); |
Kristian Høgsberg | 95ffc5e | 2007-05-09 19:23:08 -0400 | [diff] [blame] | 1341 | return 0; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1342 | } |
| 1343 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1344 | /* |
| 1345 | * Convert the scatterlist to an sbp2 page table. If any |
Kristian Høgsberg, Stefan Richter | 36abb3b | 2007-05-09 19:23:10 -0400 | [diff] [blame] | 1346 | * scatterlist entries are too big for sbp2, we split them as we |
| 1347 | * go. Even if we ask the block I/O layer to not give us sg |
| 1348 | * elements larger than 65535 bytes, some IOMMUs may merge sg elements |
| 1349 | * during DMA mapping, and Linux currently doesn't prevent this. |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1350 | */ |
Stefan Richter | b7811da | 2008-01-15 21:10:50 +0100 | [diff] [blame] | 1351 | for (i = 0, j = 0; i < count; i++, sg = sg_next(sg)) { |
| 1352 | sg_len = sg_dma_len(sg); |
| 1353 | sg_addr = sg_dma_address(sg); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1354 | while (sg_len) { |
Stefan Richter | 332ef33 | 2007-07-01 13:56:03 +0200 | [diff] [blame] | 1355 | /* FIXME: This won't get us out of the pinch. */ |
| 1356 | if (unlikely(j >= ARRAY_SIZE(orb->page_table))) { |
| 1357 | fw_error("page table overflow\n"); |
| 1358 | goto fail_page_table; |
| 1359 | } |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1360 | l = min(sg_len, SBP2_MAX_SG_ELEMENT_LENGTH); |
| 1361 | orb->page_table[j].low = sg_addr; |
| 1362 | orb->page_table[j].high = (l << 16); |
| 1363 | sg_addr += l; |
| 1364 | sg_len -= l; |
| 1365 | j++; |
| 1366 | } |
| 1367 | } |
| 1368 | |
Stefan Richter | b4be016 | 2007-07-02 22:07:34 +0200 | [diff] [blame] | 1369 | fw_memcpy_to_be32(orb->page_table, orb->page_table, |
| 1370 | sizeof(orb->page_table[0]) * j); |
| 1371 | orb->page_table_bus = |
| 1372 | dma_map_single(device->card->device, orb->page_table, |
| 1373 | sizeof(orb->page_table), DMA_TO_DEVICE); |
| 1374 | if (dma_mapping_error(orb->page_table_bus)) |
| 1375 | goto fail_page_table; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1376 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1377 | /* |
| 1378 | * The data_descriptor pointer is the one case where we need |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1379 | * to fill in the node ID part of the address. All other |
| 1380 | * pointers assume that the data referenced reside on the |
| 1381 | * initiator (i.e. us), but data_descriptor can refer to data |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1382 | * on other nodes so we need to put our ID in descriptor.high. |
| 1383 | */ |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1384 | orb->request.data_descriptor.high = lu->tgt->address_high; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1385 | orb->request.data_descriptor.low = orb->page_table_bus; |
| 1386 | orb->request.misc |= |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 1387 | COMMAND_ORB_PAGE_TABLE_PRESENT | |
| 1388 | COMMAND_ORB_DATA_SIZE(j); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1389 | |
Kristian Høgsberg | 95ffc5e | 2007-05-09 19:23:08 -0400 | [diff] [blame] | 1390 | return 0; |
| 1391 | |
| 1392 | fail_page_table: |
Stefan Richter | 412edf6 | 2007-07-16 21:05:41 +0200 | [diff] [blame] | 1393 | dma_unmap_sg(device->card->device, sg, scsi_sg_count(orb->cmd), |
Kristian Høgsberg | 95ffc5e | 2007-05-09 19:23:08 -0400 | [diff] [blame] | 1394 | orb->cmd->sc_data_direction); |
| 1395 | fail: |
| 1396 | return -ENOMEM; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1397 | } |
| 1398 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1399 | /* SCSI stack integration */ |
| 1400 | |
| 1401 | static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done) |
| 1402 | { |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1403 | struct sbp2_logical_unit *lu = cmd->device->hostdata; |
| 1404 | struct fw_device *device = fw_device(lu->tgt->unit->device.parent); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1405 | struct sbp2_command_orb *orb; |
Stefan Richter | 05cca73 | 2008-01-26 17:42:45 +0100 | [diff] [blame] | 1406 | unsigned int max_payload; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1407 | int retval = SCSI_MLQUEUE_HOST_BUSY; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1408 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1409 | /* |
| 1410 | * Bidirectional commands are not yet implemented, and unknown |
| 1411 | * transfer direction not handled. |
| 1412 | */ |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1413 | if (cmd->sc_data_direction == DMA_BIDIRECTIONAL) { |
Stefan Richter | 8a8cea2 | 2007-06-09 19:26:22 +0200 | [diff] [blame] | 1414 | fw_error("Can't handle DMA_BIDIRECTIONAL, rejecting command\n"); |
Kristian Høgsberg | e1b68c4 | 2007-05-09 19:23:09 -0400 | [diff] [blame] | 1415 | cmd->result = DID_ERROR << 16; |
| 1416 | done(cmd); |
| 1417 | return 0; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1418 | } |
| 1419 | |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 1420 | orb = kzalloc(sizeof(*orb), GFP_ATOMIC); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1421 | if (orb == NULL) { |
| 1422 | fw_notify("failed to alloc orb\n"); |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1423 | return SCSI_MLQUEUE_HOST_BUSY; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1424 | } |
| 1425 | |
Kristian Høgsberg | 12f26aa | 2007-04-10 18:11:20 -0400 | [diff] [blame] | 1426 | /* Initialize rcode to something not RCODE_COMPLETE. */ |
| 1427 | orb->base.rcode = -1; |
Kristian Høgsberg | e57d201 | 2007-08-24 18:59:58 -0400 | [diff] [blame] | 1428 | kref_init(&orb->base.kref); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1429 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1430 | orb->lu = lu; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1431 | orb->done = done; |
| 1432 | orb->cmd = cmd; |
| 1433 | |
| 1434 | orb->request.next.high = SBP2_ORB_NULL; |
| 1435 | orb->request.next.low = 0x0; |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1436 | /* |
| 1437 | * 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] | 1438 | * 1024 bytes per packet etc. The SBP-2 max_payload field |
| 1439 | * specifies the max payload size as 2 ^ (max_payload + 2), so |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 1440 | * if we set this to max_speed + 7, we get the right value. |
| 1441 | */ |
Stefan Richter | 25659f7 | 2007-07-21 22:43:05 +0200 | [diff] [blame] | 1442 | max_payload = min(device->max_speed + 7, |
| 1443 | device->card->max_receive - 1); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1444 | orb->request.misc = |
Stefan Richter | 25659f7 | 2007-07-21 22:43:05 +0200 | [diff] [blame] | 1445 | COMMAND_ORB_MAX_PAYLOAD(max_payload) | |
Stefan Richter | f139749 | 2007-06-10 21:31:36 +0200 | [diff] [blame] | 1446 | COMMAND_ORB_SPEED(device->max_speed) | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 1447 | COMMAND_ORB_NOTIFY; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1448 | |
| 1449 | if (cmd->sc_data_direction == DMA_FROM_DEVICE) |
| 1450 | orb->request.misc |= |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 1451 | COMMAND_ORB_DIRECTION(SBP2_DIRECTION_FROM_MEDIA); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1452 | else if (cmd->sc_data_direction == DMA_TO_DEVICE) |
| 1453 | orb->request.misc |= |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 1454 | COMMAND_ORB_DIRECTION(SBP2_DIRECTION_TO_MEDIA); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1455 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1456 | if (scsi_sg_count(cmd) && sbp2_map_scatterlist(orb, device, lu) < 0) |
| 1457 | goto out; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1458 | |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 1459 | fw_memcpy_to_be32(&orb->request, &orb->request, sizeof(orb->request)); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1460 | |
| 1461 | memset(orb->request.command_block, |
Kristian Høgsberg | 2d826cc | 2007-05-09 19:23:14 -0400 | [diff] [blame] | 1462 | 0, sizeof(orb->request.command_block)); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1463 | memcpy(orb->request.command_block, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd)); |
| 1464 | |
| 1465 | orb->base.callback = complete_command_orb; |
Stefan Richter | 8526392 | 2007-07-02 21:04:08 +0200 | [diff] [blame] | 1466 | orb->base.request_bus = |
| 1467 | dma_map_single(device->card->device, &orb->request, |
| 1468 | sizeof(orb->request), DMA_TO_DEVICE); |
| 1469 | if (dma_mapping_error(orb->base.request_bus)) |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1470 | goto out; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1471 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1472 | sbp2_send_orb(&orb->base, lu, lu->tgt->node_id, lu->generation, |
| 1473 | lu->command_block_agent_address + SBP2_ORB_POINTER); |
| 1474 | retval = 0; |
| 1475 | out: |
Kristian Høgsberg | e57d201 | 2007-08-24 18:59:58 -0400 | [diff] [blame] | 1476 | kref_put(&orb->base.kref, free_orb); |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1477 | return retval; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1478 | } |
| 1479 | |
Stefan Richter | cfb0138 | 2007-01-23 21:20:08 +0100 | [diff] [blame] | 1480 | static int sbp2_scsi_slave_alloc(struct scsi_device *sdev) |
| 1481 | { |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1482 | struct sbp2_logical_unit *lu = sdev->hostdata; |
Stefan Richter | cfb0138 | 2007-01-23 21:20:08 +0100 | [diff] [blame] | 1483 | |
Stefan Richter | 5513c5f | 2008-02-17 14:56:19 +0100 | [diff] [blame] | 1484 | /* (Re-)Adding logical units via the SCSI stack is not supported. */ |
| 1485 | if (!lu) |
| 1486 | return -ENOSYS; |
| 1487 | |
Stefan Richter | cfb0138 | 2007-01-23 21:20:08 +0100 | [diff] [blame] | 1488 | sdev->allow_restart = 1; |
| 1489 | |
James Bottomley | 465ff31 | 2008-01-01 10:00:10 -0600 | [diff] [blame] | 1490 | /* |
| 1491 | * Update the dma alignment (minimum alignment requirements for |
| 1492 | * start and end of DMA transfers) to be a sector |
| 1493 | */ |
| 1494 | blk_queue_update_dma_alignment(sdev->request_queue, 511); |
| 1495 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1496 | if (lu->tgt->workarounds & SBP2_WORKAROUND_INQUIRY_36) |
Stefan Richter | cfb0138 | 2007-01-23 21:20:08 +0100 | [diff] [blame] | 1497 | sdev->inquiry_len = 36; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1498 | |
Stefan Richter | cfb0138 | 2007-01-23 21:20:08 +0100 | [diff] [blame] | 1499 | return 0; |
| 1500 | } |
| 1501 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1502 | static int sbp2_scsi_slave_configure(struct scsi_device *sdev) |
| 1503 | { |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1504 | struct sbp2_logical_unit *lu = sdev->hostdata; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1505 | |
Stefan Richter | cfb0138 | 2007-01-23 21:20:08 +0100 | [diff] [blame] | 1506 | sdev->use_10_for_rw = 1; |
| 1507 | |
| 1508 | if (sdev->type == TYPE_ROM) |
| 1509 | sdev->use_10_for_ms = 1; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1510 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1511 | if (sdev->type == TYPE_DISK && |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1512 | lu->tgt->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1513 | sdev->skip_ms_page_8 = 1; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1514 | |
| 1515 | if (lu->tgt->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1516 | sdev->fix_capacity = 1; |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1517 | |
| 1518 | if (lu->tgt->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS) |
Stefan Richter | cf47c7a | 2007-06-17 23:52:08 +0200 | [diff] [blame] | 1519 | blk_queue_max_sectors(sdev->request_queue, 128 * 1024 / 512); |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1520 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1521 | return 0; |
| 1522 | } |
| 1523 | |
| 1524 | /* |
| 1525 | * Called by scsi stack when something has really gone wrong. Usually |
| 1526 | * called when a command has timed-out for some reason. |
| 1527 | */ |
| 1528 | static int sbp2_scsi_abort(struct scsi_cmnd *cmd) |
| 1529 | { |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1530 | struct sbp2_logical_unit *lu = cmd->device->hostdata; |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1531 | |
Stefan Richter | 48f18c7 | 2008-02-03 23:09:50 +0100 | [diff] [blame] | 1532 | fw_notify("%s: sbp2_scsi_abort\n", lu->tgt->bus_id); |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1533 | sbp2_agent_reset(lu); |
| 1534 | sbp2_cancel_orbs(lu); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1535 | |
| 1536 | return SUCCESS; |
| 1537 | } |
| 1538 | |
Stefan Richter | 14e2198 | 2007-05-27 13:18:27 +0200 | [diff] [blame] | 1539 | /* |
| 1540 | * Format of /sys/bus/scsi/devices/.../ieee1394_id: |
| 1541 | * u64 EUI-64 : u24 directory_ID : u16 LUN (all printed in hexadecimal) |
| 1542 | * |
| 1543 | * This is the concatenation of target port identifier and logical unit |
| 1544 | * identifier as per SAM-2...SAM-4 annex A. |
| 1545 | */ |
| 1546 | static ssize_t |
| 1547 | sbp2_sysfs_ieee1394_id_show(struct device *dev, struct device_attribute *attr, |
| 1548 | char *buf) |
| 1549 | { |
| 1550 | struct scsi_device *sdev = to_scsi_device(dev); |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1551 | struct sbp2_logical_unit *lu; |
Stefan Richter | 14e2198 | 2007-05-27 13:18:27 +0200 | [diff] [blame] | 1552 | struct fw_device *device; |
Stefan Richter | 14e2198 | 2007-05-27 13:18:27 +0200 | [diff] [blame] | 1553 | |
| 1554 | if (!sdev) |
| 1555 | return 0; |
Stefan Richter | 14e2198 | 2007-05-27 13:18:27 +0200 | [diff] [blame] | 1556 | |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1557 | lu = sdev->hostdata; |
| 1558 | device = fw_device(lu->tgt->unit->device.parent); |
Stefan Richter | 14e2198 | 2007-05-27 13:18:27 +0200 | [diff] [blame] | 1559 | |
| 1560 | return sprintf(buf, "%08x%08x:%06x:%04x\n", |
| 1561 | device->config_rom[3], device->config_rom[4], |
Stefan Richter | 5a3c2be | 2007-08-25 14:05:28 +0200 | [diff] [blame] | 1562 | lu->tgt->directory_id, lu->lun); |
Stefan Richter | 14e2198 | 2007-05-27 13:18:27 +0200 | [diff] [blame] | 1563 | } |
| 1564 | |
| 1565 | static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); |
| 1566 | |
| 1567 | static struct device_attribute *sbp2_scsi_sysfs_attrs[] = { |
| 1568 | &dev_attr_ieee1394_id, |
| 1569 | NULL |
| 1570 | }; |
| 1571 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1572 | static struct scsi_host_template scsi_driver_template = { |
| 1573 | .module = THIS_MODULE, |
| 1574 | .name = "SBP-2 IEEE-1394", |
Kristian Høgsberg | b02b6bc | 2007-05-09 19:23:12 -0400 | [diff] [blame] | 1575 | .proc_name = sbp2_driver_name, |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1576 | .queuecommand = sbp2_scsi_queuecommand, |
Stefan Richter | cfb0138 | 2007-01-23 21:20:08 +0100 | [diff] [blame] | 1577 | .slave_alloc = sbp2_scsi_slave_alloc, |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1578 | .slave_configure = sbp2_scsi_slave_configure, |
| 1579 | .eh_abort_handler = sbp2_scsi_abort, |
| 1580 | .this_id = -1, |
| 1581 | .sg_tablesize = SG_ALL, |
| 1582 | .use_clustering = ENABLE_CLUSTERING, |
Stefan Richter | 02af8e7 | 2007-01-21 20:50:11 +0100 | [diff] [blame] | 1583 | .cmd_per_lun = 1, |
| 1584 | .can_queue = 1, |
Stefan Richter | 14e2198 | 2007-05-27 13:18:27 +0200 | [diff] [blame] | 1585 | .sdev_attrs = sbp2_scsi_sysfs_attrs, |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1586 | }; |
| 1587 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1588 | MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); |
| 1589 | MODULE_DESCRIPTION("SCSI over IEEE1394"); |
| 1590 | MODULE_LICENSE("GPL"); |
| 1591 | MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); |
| 1592 | |
Olaf Hering | 1e4c7b0 | 2007-05-05 23:17:13 +0200 | [diff] [blame] | 1593 | /* Provide a module alias so root-on-sbp2 initrds don't break. */ |
| 1594 | #ifndef CONFIG_IEEE1394_SBP2_MODULE |
| 1595 | MODULE_ALIAS("sbp2"); |
| 1596 | #endif |
| 1597 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1598 | static int __init sbp2_init(void) |
| 1599 | { |
Stefan Richter | df8ec24 | 2007-08-12 12:51:18 +0200 | [diff] [blame] | 1600 | sbp2_wq = create_singlethread_workqueue(KBUILD_MODNAME); |
| 1601 | if (!sbp2_wq) |
| 1602 | return -ENOMEM; |
| 1603 | |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1604 | return driver_register(&sbp2_driver.driver); |
| 1605 | } |
| 1606 | |
| 1607 | static void __exit sbp2_cleanup(void) |
| 1608 | { |
| 1609 | driver_unregister(&sbp2_driver.driver); |
Stefan Richter | df8ec24 | 2007-08-12 12:51:18 +0200 | [diff] [blame] | 1610 | destroy_workqueue(sbp2_wq); |
Kristian Høgsberg | 9ba136d | 2006-12-19 19:58:40 -0500 | [diff] [blame] | 1611 | } |
| 1612 | |
| 1613 | module_init(sbp2_init); |
| 1614 | module_exit(sbp2_cleanup); |