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Kristian Høgsbergc781c062007-05-07 20:33:32 -04001/*
2 * SBP2 driver (SCSI over IEEE1394)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05003 *
Kristian Høgsberg27a15e52007-02-06 14:49:39 -05004 * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net>
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05005 *
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 Høgsbergc781c062007-05-07 20:33:32 -040021/*
22 * The basic structure of this driver is based on the old storage driver,
Kristian Høgsberg27a15e52007-02-06 14:49:39 -050023 * 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 Richter7bb6bf72008-02-03 23:12:17 +010031#include <linux/blkdev.h>
Stefan Richter09b12dd2008-08-14 21:47:21 +020032#include <linux/bug.h>
Stefan Richtere8ca9702009-06-04 21:09:38 +020033#include <linux/completion.h>
Stefan Richter9220f192008-02-03 23:04:38 +010034#include <linux/delay.h>
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -050035#include <linux/device.h>
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -050036#include <linux/dma-mapping.h>
Stefan Richter77c9a5d2009-06-05 16:26:18 +020037#include <linux/firewire.h>
Stefan Richtere8ca9702009-06-04 21:09:38 +020038#include <linux/firewire-constants.h>
39#include <linux/init.h>
40#include <linux/jiffies.h>
Stefan Richter7bb6bf72008-02-03 23:12:17 +010041#include <linux/kernel.h>
Stefan Richtere8ca9702009-06-04 21:09:38 +020042#include <linux/kref.h>
43#include <linux/list.h>
Stefan Richter7bb6bf72008-02-03 23:12:17 +010044#include <linux/mod_devicetable.h>
45#include <linux/module.h>
46#include <linux/moduleparam.h>
47#include <linux/scatterlist.h>
Stefan Richtere8ca9702009-06-04 21:09:38 +020048#include <linux/slab.h>
49#include <linux/spinlock.h>
Stefan Richtere7cdf232007-07-01 13:54:57 +020050#include <linux/string.h>
Stefan Richter2df222b2007-08-13 17:48:25 +020051#include <linux/stringify.h>
Stefan Richterdf8ec242007-08-12 12:51:18 +020052#include <linux/workqueue.h>
Stefan Richtere8ca9702009-06-04 21:09:38 +020053
54#include <asm/byteorder.h>
Stefan Richterb5d2a5e2008-01-25 18:57:41 +010055#include <asm/system.h>
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -050056
57#include <scsi/scsi.h>
58#include <scsi/scsi_cmnd.h>
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -050059#include <scsi/scsi_device.h>
60#include <scsi/scsi_host.h>
61
Stefan Richter5cd54c92007-06-17 23:55:41 +020062/*
63 * So far only bridges from Oxford Semiconductor are known to support
64 * concurrent logins. Depending on firmware, four or two concurrent logins
65 * are possible on OXFW911 and newer Oxsemi bridges.
66 *
67 * Concurrent logins are useful together with cluster filesystems.
68 */
69static int sbp2_param_exclusive_login = 1;
70module_param_named(exclusive_login, sbp2_param_exclusive_login, bool, 0644);
71MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device "
72 "(default = Y, use N for concurrent initiators)");
73
Stefan Richter2df222b2007-08-13 17:48:25 +020074/*
75 * Flags for firmware oddities
76 *
77 * - 128kB max transfer
78 * Limit transfer size. Necessary for some old bridges.
79 *
80 * - 36 byte inquiry
81 * When scsi_mod probes the device, let the inquiry command look like that
82 * from MS Windows.
83 *
84 * - skip mode page 8
85 * Suppress sending of mode_sense for mode page 8 if the device pretends to
86 * support the SCSI Primary Block commands instead of Reduced Block Commands.
87 *
88 * - fix capacity
89 * Tell sd_mod to correct the last sector number reported by read_capacity.
90 * Avoids access beyond actual disk limits on devices with an off-by-one bug.
91 * Don't use this with devices which don't have this bug.
92 *
Stefan Richter9220f192008-02-03 23:04:38 +010093 * - delay inquiry
94 * Wait extra SBP2_INQUIRY_DELAY seconds after login before SCSI inquiry.
95 *
Stefan Richterffcaade2008-05-11 00:35:04 +020096 * - power condition
97 * Set the power condition field in the START STOP UNIT commands sent by
98 * sd_mod on suspend, resume, and shutdown (if manage_start_stop is on).
99 * Some disks need this to spin down or to resume properly.
100 *
Stefan Richter2df222b2007-08-13 17:48:25 +0200101 * - override internal blacklist
102 * Instead of adding to the built-in blacklist, use only the workarounds
103 * specified in the module load parameter.
104 * Useful if a blacklist entry interfered with a non-broken device.
105 */
106#define SBP2_WORKAROUND_128K_MAX_TRANS 0x1
107#define SBP2_WORKAROUND_INQUIRY_36 0x2
108#define SBP2_WORKAROUND_MODE_SENSE_8 0x4
109#define SBP2_WORKAROUND_FIX_CAPACITY 0x8
Stefan Richter9220f192008-02-03 23:04:38 +0100110#define SBP2_WORKAROUND_DELAY_INQUIRY 0x10
111#define SBP2_INQUIRY_DELAY 12
Stefan Richterffcaade2008-05-11 00:35:04 +0200112#define SBP2_WORKAROUND_POWER_CONDITION 0x20
Stefan Richter2df222b2007-08-13 17:48:25 +0200113#define SBP2_WORKAROUND_OVERRIDE 0x100
114
115static int sbp2_param_workarounds;
116module_param_named(workarounds, sbp2_param_workarounds, int, 0644);
117MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0"
118 ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS)
119 ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36)
120 ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8)
121 ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY)
Stefan Richter9220f192008-02-03 23:04:38 +0100122 ", delay inquiry = " __stringify(SBP2_WORKAROUND_DELAY_INQUIRY)
Stefan Richterffcaade2008-05-11 00:35:04 +0200123 ", set power condition in start stop unit = "
124 __stringify(SBP2_WORKAROUND_POWER_CONDITION)
Stefan Richter2df222b2007-08-13 17:48:25 +0200125 ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE)
126 ", or a combination)");
127
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500128/* I don't know why the SCSI stack doesn't define something like this... */
Kristian Høgsberga98e2712007-05-07 20:33:34 -0400129typedef void (*scsi_done_fn_t)(struct scsi_cmnd *);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500130
131static const char sbp2_driver_name[] = "sbp2";
132
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200133/*
134 * We create one struct sbp2_logical_unit per SBP-2 Logical Unit Number Entry
135 * and one struct scsi_device per sbp2_logical_unit.
136 */
137struct sbp2_logical_unit {
138 struct sbp2_target *tgt;
139 struct list_head link;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500140 struct fw_address_handler address_handler;
141 struct list_head orb_list;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200142
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500143 u64 command_block_agent_address;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200144 u16 lun;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500145 int login_id;
146
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400147 /*
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200148 * The generation is updated once we've logged in or reconnected
149 * to the logical unit. Thus, I/O to the device will automatically
150 * fail and get retried if it happens in a window where the device
151 * is not ready, e.g. after a bus reset but before we reconnect.
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400152 */
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500153 int generation;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500154 int retries;
155 struct delayed_work work;
Stefan Richterf8436152008-02-26 23:30:02 +0100156 bool has_sdev;
Stefan Richter2e2705b2008-02-16 16:37:28 +0100157 bool blocked;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500158};
159
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200160/*
161 * We create one struct sbp2_target per IEEE 1212 Unit Directory
162 * and one struct Scsi_Host per sbp2_target.
163 */
164struct sbp2_target {
165 struct kref kref;
166 struct fw_unit *unit;
Stefan Richter48f18c72008-02-03 23:09:50 +0100167 const char *bus_id;
Stefan Richter05cca732008-01-26 17:42:45 +0100168 struct list_head lu_list;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200169
170 u64 management_agent_address;
Stefan Richterc9755e12008-03-24 20:54:28 +0100171 u64 guid;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200172 int directory_id;
173 int node_id;
174 int address_high;
Stefan Richter05cca732008-01-26 17:42:45 +0100175 unsigned int workarounds;
Jarod Wilson384170d2008-01-25 23:31:12 -0500176 unsigned int mgt_orb_timeout;
Stefan Richtera08e1002009-01-24 19:41:46 +0100177 unsigned int max_payload;
Stefan Richter2e2705b2008-02-16 16:37:28 +0100178
179 int dont_block; /* counter for each logical unit */
180 int blocked; /* ditto */
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200181};
182
Stefan Richtere5110d02009-06-06 18:35:27 +0200183static struct fw_device *target_device(struct sbp2_target *tgt)
184{
185 return fw_parent_device(tgt->unit);
186}
187
Jay Fenlasoncd1f70fd2008-10-24 15:26:20 -0400188/* Impossible login_id, to detect logout attempt before successful login */
189#define INVALID_LOGIN_ID 0x10000
190
Jarod Wilsona4c379c2008-01-19 13:15:05 +0100191/*
192 * Per section 7.4.8 of the SBP-2 spec, a mgt_ORB_timeout value can be
Jarod Wilson384170d2008-01-25 23:31:12 -0500193 * provided in the config rom. Most devices do provide a value, which
194 * we'll use for login management orbs, but with some sane limits.
Jarod Wilsona4c379c2008-01-19 13:15:05 +0100195 */
Jarod Wilson384170d2008-01-25 23:31:12 -0500196#define SBP2_MIN_LOGIN_ORB_TIMEOUT 5000U /* Timeout in ms */
197#define SBP2_MAX_LOGIN_ORB_TIMEOUT 40000U /* Timeout in ms */
Stefan Richter05cca732008-01-26 17:42:45 +0100198#define SBP2_ORB_TIMEOUT 2000U /* Timeout in ms */
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500199#define SBP2_ORB_NULL 0x80000000
Jarod Wilson17cff9f2008-03-07 01:43:31 -0500200#define SBP2_RETRY_LIMIT 0xf /* 15 retries */
201#define SBP2_CYCLE_LIMIT (0xc8 << 12) /* 200 125us cycles */
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500202
Stefan Richter09b12dd2008-08-14 21:47:21 +0200203/*
Stefan Richteraf271942009-06-30 20:27:59 +0200204 * There is no transport protocol limit to the CDB length, but we implement
205 * a fixed length only. 16 bytes is enough for disks larger than 2 TB.
206 */
207#define SBP2_MAX_CDB_SIZE 16
208
209/*
Stefan Richter09b12dd2008-08-14 21:47:21 +0200210 * The default maximum s/g segment size of a FireWire controller is
211 * usually 0x10000, but SBP-2 only allows 0xffff. Since buffers have to
212 * be quadlet-aligned, we set the length limit to 0xffff & ~3.
213 */
214#define SBP2_MAX_SEG_SIZE 0xfffc
215
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500216/* Unit directory keys */
Jarod Wilson384170d2008-01-25 23:31:12 -0500217#define SBP2_CSR_UNIT_CHARACTERISTICS 0x3a
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200218#define SBP2_CSR_FIRMWARE_REVISION 0x3c
219#define SBP2_CSR_LOGICAL_UNIT_NUMBER 0x14
220#define SBP2_CSR_LOGICAL_UNIT_DIRECTORY 0xd4
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500221
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500222/* Management orb opcodes */
223#define SBP2_LOGIN_REQUEST 0x0
224#define SBP2_QUERY_LOGINS_REQUEST 0x1
225#define SBP2_RECONNECT_REQUEST 0x3
226#define SBP2_SET_PASSWORD_REQUEST 0x4
227#define SBP2_LOGOUT_REQUEST 0x7
228#define SBP2_ABORT_TASK_REQUEST 0xb
229#define SBP2_ABORT_TASK_SET 0xc
230#define SBP2_LOGICAL_UNIT_RESET 0xe
231#define SBP2_TARGET_RESET_REQUEST 0xf
232
233/* Offsets for command block agent registers */
234#define SBP2_AGENT_STATE 0x00
235#define SBP2_AGENT_RESET 0x04
236#define SBP2_ORB_POINTER 0x08
237#define SBP2_DOORBELL 0x10
238#define SBP2_UNSOLICITED_STATUS_ENABLE 0x14
239
240/* Status write response codes */
241#define SBP2_STATUS_REQUEST_COMPLETE 0x0
242#define SBP2_STATUS_TRANSPORT_FAILURE 0x1
243#define SBP2_STATUS_ILLEGAL_REQUEST 0x2
244#define SBP2_STATUS_VENDOR_DEPENDENT 0x3
245
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400246#define STATUS_GET_ORB_HIGH(v) ((v).status & 0xffff)
247#define STATUS_GET_SBP_STATUS(v) (((v).status >> 16) & 0xff)
248#define STATUS_GET_LEN(v) (((v).status >> 24) & 0x07)
249#define STATUS_GET_DEAD(v) (((v).status >> 27) & 0x01)
250#define STATUS_GET_RESPONSE(v) (((v).status >> 28) & 0x03)
251#define STATUS_GET_SOURCE(v) (((v).status >> 30) & 0x03)
252#define STATUS_GET_ORB_LOW(v) ((v).orb_low)
253#define STATUS_GET_DATA(v) ((v).data)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500254
255struct sbp2_status {
256 u32 status;
257 u32 orb_low;
258 u8 data[24];
259};
260
261struct sbp2_pointer {
Stefan Richter71ee9f02008-02-28 20:51:11 +0100262 __be32 high;
263 __be32 low;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500264};
265
266struct sbp2_orb {
267 struct fw_transaction t;
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400268 struct kref kref;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500269 dma_addr_t request_bus;
270 int rcode;
271 struct sbp2_pointer pointer;
Kristian Høgsberga98e2712007-05-07 20:33:34 -0400272 void (*callback)(struct sbp2_orb * orb, struct sbp2_status * status);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500273 struct list_head link;
274};
275
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400276#define MANAGEMENT_ORB_LUN(v) ((v))
277#define MANAGEMENT_ORB_FUNCTION(v) ((v) << 16)
278#define MANAGEMENT_ORB_RECONNECT(v) ((v) << 20)
Stefan Richter5cd54c92007-06-17 23:55:41 +0200279#define MANAGEMENT_ORB_EXCLUSIVE(v) ((v) ? 1 << 28 : 0)
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400280#define MANAGEMENT_ORB_REQUEST_FORMAT(v) ((v) << 29)
281#define MANAGEMENT_ORB_NOTIFY ((1) << 31)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500282
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400283#define MANAGEMENT_ORB_RESPONSE_LENGTH(v) ((v))
284#define MANAGEMENT_ORB_PASSWORD_LENGTH(v) ((v) << 16)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500285
286struct sbp2_management_orb {
287 struct sbp2_orb base;
288 struct {
289 struct sbp2_pointer password;
290 struct sbp2_pointer response;
Stefan Richter71ee9f02008-02-28 20:51:11 +0100291 __be32 misc;
292 __be32 length;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500293 struct sbp2_pointer status_fifo;
294 } request;
295 __be32 response[4];
296 dma_addr_t response_bus;
297 struct completion done;
298 struct sbp2_status status;
299};
300
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500301struct sbp2_login_response {
Stefan Richter71ee9f02008-02-28 20:51:11 +0100302 __be32 misc;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500303 struct sbp2_pointer command_block_agent;
Stefan Richter71ee9f02008-02-28 20:51:11 +0100304 __be32 reconnect_hold;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500305};
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400306#define COMMAND_ORB_DATA_SIZE(v) ((v))
307#define COMMAND_ORB_PAGE_SIZE(v) ((v) << 16)
308#define COMMAND_ORB_PAGE_TABLE_PRESENT ((1) << 19)
309#define COMMAND_ORB_MAX_PAYLOAD(v) ((v) << 20)
310#define COMMAND_ORB_SPEED(v) ((v) << 24)
Stefan Richter0d7dcbf2008-02-28 20:52:02 +0100311#define COMMAND_ORB_DIRECTION ((1) << 27)
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400312#define COMMAND_ORB_REQUEST_FORMAT(v) ((v) << 29)
313#define COMMAND_ORB_NOTIFY ((1) << 31)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500314
315struct sbp2_command_orb {
316 struct sbp2_orb base;
317 struct {
318 struct sbp2_pointer next;
319 struct sbp2_pointer data_descriptor;
Stefan Richter71ee9f02008-02-28 20:51:11 +0100320 __be32 misc;
Stefan Richteraf271942009-06-30 20:27:59 +0200321 u8 command_block[SBP2_MAX_CDB_SIZE];
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500322 } request;
323 struct scsi_cmnd *cmd;
324 scsi_done_fn_t done;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200325 struct sbp2_logical_unit *lu;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500326
Stefan Richter9fb2dd12007-07-01 13:55:31 +0200327 struct sbp2_pointer page_table[SG_ALL] __attribute__((aligned(8)));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500328 dma_addr_t page_table_bus;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500329};
330
Stefan Richterf7460722009-01-24 19:41:46 +0100331#define SBP2_ROM_VALUE_WILDCARD ~0 /* match all */
332#define SBP2_ROM_VALUE_MISSING 0xff000000 /* not present in the unit dir. */
333
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500334/*
335 * List of devices with known bugs.
336 *
337 * The firmware_revision field, masked with 0xffff00, is the best
338 * indicator for the type of bridge chip of a device. It yields a few
339 * false positives but this did not break correctly behaving devices
Stefan Richterf7460722009-01-24 19:41:46 +0100340 * so far.
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500341 */
342static const struct {
343 u32 firmware_revision;
344 u32 model;
Stefan Richter05cca732008-01-26 17:42:45 +0100345 unsigned int workarounds;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500346} sbp2_workarounds_table[] = {
347 /* DViCO Momobay CX-1 with TSB42AA9 bridge */ {
348 .firmware_revision = 0x002800,
349 .model = 0x001010,
350 .workarounds = SBP2_WORKAROUND_INQUIRY_36 |
Stefan Richterffcaade2008-05-11 00:35:04 +0200351 SBP2_WORKAROUND_MODE_SENSE_8 |
352 SBP2_WORKAROUND_POWER_CONDITION,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500353 },
Stefan Richter9220f192008-02-03 23:04:38 +0100354 /* DViCO Momobay FX-3A with TSB42AA9A bridge */ {
355 .firmware_revision = 0x002800,
356 .model = 0x000000,
Stefan Richter3c5f8032009-09-06 19:33:50 +0200357 .workarounds = SBP2_WORKAROUND_POWER_CONDITION,
Stefan Richter9220f192008-02-03 23:04:38 +0100358 },
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500359 /* Initio bridges, actually only needed for some older ones */ {
360 .firmware_revision = 0x000200,
Stefan Richterf7460722009-01-24 19:41:46 +0100361 .model = SBP2_ROM_VALUE_WILDCARD,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500362 .workarounds = SBP2_WORKAROUND_INQUIRY_36,
363 },
Stefan Richterffcaade2008-05-11 00:35:04 +0200364 /* PL-3507 bridge with Prolific firmware */ {
365 .firmware_revision = 0x012800,
Stefan Richterf7460722009-01-24 19:41:46 +0100366 .model = SBP2_ROM_VALUE_WILDCARD,
Stefan Richterffcaade2008-05-11 00:35:04 +0200367 .workarounds = SBP2_WORKAROUND_POWER_CONDITION,
368 },
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500369 /* Symbios bridge */ {
370 .firmware_revision = 0xa0b800,
Stefan Richterf7460722009-01-24 19:41:46 +0100371 .model = SBP2_ROM_VALUE_WILDCARD,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500372 .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS,
373 },
Stefan Richter2aa9ff72008-03-11 22:32:03 +0100374 /* Datafab MD2-FW2 with Symbios/LSILogic SYM13FW500 bridge */ {
375 .firmware_revision = 0x002600,
Stefan Richterf7460722009-01-24 19:41:46 +0100376 .model = SBP2_ROM_VALUE_WILDCARD,
Stefan Richter2aa9ff72008-03-11 22:32:03 +0100377 .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS,
378 },
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400379 /*
Stefan Richterc8c47072009-01-29 00:11:59 +0100380 * iPod 2nd generation: needs 128k max transfer size workaround
381 * iPod 3rd generation: needs fix capacity workaround
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400382 */
Stefan Richterc8c47072009-01-29 00:11:59 +0100383 {
384 .firmware_revision = 0x0a2700,
385 .model = 0x000000,
386 .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS |
387 SBP2_WORKAROUND_FIX_CAPACITY,
388 },
389 /* iPod 4th generation */ {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500390 .firmware_revision = 0x0a2700,
391 .model = 0x000021,
392 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
393 },
394 /* iPod mini */ {
395 .firmware_revision = 0x0a2700,
Stefan Richter031bb272008-11-22 12:38:58 +0100396 .model = 0x000022,
397 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
398 },
399 /* iPod mini */ {
400 .firmware_revision = 0x0a2700,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500401 .model = 0x000023,
402 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
403 },
404 /* iPod Photo */ {
405 .firmware_revision = 0x0a2700,
406 .model = 0x00007e,
407 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
408 }
409};
410
Stefan Richter53dca512008-12-14 21:47:04 +0100411static void free_orb(struct kref *kref)
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400412{
413 struct sbp2_orb *orb = container_of(kref, struct sbp2_orb, kref);
414
415 kfree(orb);
416}
417
Stefan Richter53dca512008-12-14 21:47:04 +0100418static void sbp2_status_write(struct fw_card *card, struct fw_request *request,
419 int tcode, int destination, int source,
420 int generation, int speed,
421 unsigned long long offset,
422 void *payload, size_t length, void *callback_data)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500423{
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200424 struct sbp2_logical_unit *lu = callback_data;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500425 struct sbp2_orb *orb;
426 struct sbp2_status status;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500427 unsigned long flags;
428
429 if (tcode != TCODE_WRITE_BLOCK_REQUEST ||
Stefan Richter094614f2009-09-06 18:51:27 +0200430 length < 8 || length > sizeof(status)) {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500431 fw_send_response(card, request, RCODE_TYPE_ERROR);
432 return;
433 }
434
Stefan Richter094614f2009-09-06 18:51:27 +0200435 status.status = be32_to_cpup(payload);
436 status.orb_low = be32_to_cpup(payload + 4);
437 memset(status.data, 0, sizeof(status.data));
438 if (length > 8)
439 memcpy(status.data, payload + 8, length - 8);
440
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400441 if (STATUS_GET_SOURCE(status) == 2 || STATUS_GET_SOURCE(status) == 3) {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500442 fw_notify("non-orb related status write, not handled\n");
443 fw_send_response(card, request, RCODE_COMPLETE);
444 return;
445 }
446
447 /* Lookup the orb corresponding to this status write. */
448 spin_lock_irqsave(&card->lock, flags);
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200449 list_for_each_entry(orb, &lu->orb_list, link) {
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400450 if (STATUS_GET_ORB_HIGH(status) == 0 &&
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400451 STATUS_GET_ORB_LOW(status) == orb->request_bus) {
452 orb->rcode = RCODE_COMPLETE;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500453 list_del(&orb->link);
454 break;
455 }
456 }
457 spin_unlock_irqrestore(&card->lock, flags);
458
Stefan Richterbaed6b82009-09-03 23:07:35 +0200459 if (&orb->link != &lu->orb_list) {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500460 orb->callback(orb, &status);
Stefan Richterbaed6b82009-09-03 23:07:35 +0200461 kref_put(&orb->kref, free_orb);
462 } else {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500463 fw_error("status write for unknown orb\n");
Stefan Richterbaed6b82009-09-03 23:07:35 +0200464 }
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400465
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500466 fw_send_response(card, request, RCODE_COMPLETE);
467}
468
Stefan Richter53dca512008-12-14 21:47:04 +0100469static void complete_transaction(struct fw_card *card, int rcode,
470 void *payload, size_t length, void *data)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500471{
472 struct sbp2_orb *orb = data;
473 unsigned long flags;
474
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400475 /*
476 * This is a little tricky. We can get the status write for
477 * the orb before we get this callback. The status write
478 * handler above will assume the orb pointer transaction was
479 * successful and set the rcode to RCODE_COMPLETE for the orb.
480 * So this callback only sets the rcode if it hasn't already
481 * been set and only does the cleanup if the transaction
482 * failed and we didn't already get a status write.
483 */
484 spin_lock_irqsave(&card->lock, flags);
485
486 if (orb->rcode == -1)
487 orb->rcode = rcode;
488 if (orb->rcode != RCODE_COMPLETE) {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500489 list_del(&orb->link);
Stefan Richter1b34e972007-08-25 10:40:42 +0200490 spin_unlock_irqrestore(&card->lock, flags);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500491 orb->callback(orb, NULL);
Stefan Richter1b34e972007-08-25 10:40:42 +0200492 } else {
493 spin_unlock_irqrestore(&card->lock, flags);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500494 }
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400495
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400496 kref_put(&orb->kref, free_orb);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500497}
498
Stefan Richter53dca512008-12-14 21:47:04 +0100499static void sbp2_send_orb(struct sbp2_orb *orb, struct sbp2_logical_unit *lu,
500 int node_id, int generation, u64 offset)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500501{
Stefan Richtere5110d02009-06-06 18:35:27 +0200502 struct fw_device *device = target_device(lu->tgt);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500503 unsigned long flags;
504
505 orb->pointer.high = 0;
Stefan Richter71ee9f02008-02-28 20:51:11 +0100506 orb->pointer.low = cpu_to_be32(orb->request_bus);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500507
508 spin_lock_irqsave(&device->card->lock, flags);
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200509 list_add_tail(&orb->link, &lu->orb_list);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500510 spin_unlock_irqrestore(&device->card->lock, flags);
511
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400512 /* Take a ref for the orb list and for the transaction callback. */
513 kref_get(&orb->kref);
514 kref_get(&orb->kref);
515
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500516 fw_send_request(device->card, &orb->t, TCODE_WRITE_BLOCK_REQUEST,
Stefan Richterf1397492007-06-10 21:31:36 +0200517 node_id, generation, device->max_speed, offset,
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400518 &orb->pointer, sizeof(orb->pointer),
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500519 complete_transaction, orb);
520}
521
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200522static int sbp2_cancel_orbs(struct sbp2_logical_unit *lu)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500523{
Stefan Richtere5110d02009-06-06 18:35:27 +0200524 struct fw_device *device = target_device(lu->tgt);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500525 struct sbp2_orb *orb, *next;
526 struct list_head list;
527 unsigned long flags;
Kristian Høgsberg2aaad972007-03-07 12:12:47 -0500528 int retval = -ENOENT;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500529
530 INIT_LIST_HEAD(&list);
531 spin_lock_irqsave(&device->card->lock, flags);
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200532 list_splice_init(&lu->orb_list, &list);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500533 spin_unlock_irqrestore(&device->card->lock, flags);
534
535 list_for_each_entry_safe(orb, next, &list, link) {
Kristian Høgsberg2aaad972007-03-07 12:12:47 -0500536 retval = 0;
Kristian Høgsberg730c32f2007-02-06 14:49:32 -0500537 if (fw_cancel_transaction(device->card, &orb->t) == 0)
538 continue;
539
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500540 orb->rcode = RCODE_CANCELLED;
541 orb->callback(orb, NULL);
542 }
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500543
Kristian Høgsberg2aaad972007-03-07 12:12:47 -0500544 return retval;
Kristian Høgsberg1d3d52c2007-02-06 14:49:33 -0500545}
546
Stefan Richter53dca512008-12-14 21:47:04 +0100547static void complete_management_orb(struct sbp2_orb *base_orb,
548 struct sbp2_status *status)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500549{
550 struct sbp2_management_orb *orb =
Jay Fenlason6f061482007-06-27 16:04:33 -0400551 container_of(base_orb, struct sbp2_management_orb, base);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500552
553 if (status)
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400554 memcpy(&orb->status, status, sizeof(*status));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500555 complete(&orb->done);
556}
557
Stefan Richter53dca512008-12-14 21:47:04 +0100558static int sbp2_send_management_orb(struct sbp2_logical_unit *lu, int node_id,
559 int generation, int function,
560 int lun_or_login_id, void *response)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500561{
Stefan Richtere5110d02009-06-06 18:35:27 +0200562 struct fw_device *device = target_device(lu->tgt);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500563 struct sbp2_management_orb *orb;
Jarod Wilsona4c379c2008-01-19 13:15:05 +0100564 unsigned int timeout;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500565 int retval = -ENOMEM;
566
Stefan Richterbe6f48b2008-01-27 19:14:44 +0100567 if (function == SBP2_LOGOUT_REQUEST && fw_device_is_shutdown(device))
568 return 0;
569
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400570 orb = kzalloc(sizeof(*orb), GFP_ATOMIC);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500571 if (orb == NULL)
572 return -ENOMEM;
573
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400574 kref_init(&orb->base.kref);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500575 orb->response_bus =
576 dma_map_single(device->card->device, &orb->response,
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400577 sizeof(orb->response), DMA_FROM_DEVICE);
FUJITA Tomonori8d8bb392008-07-25 19:44:49 -0700578 if (dma_mapping_error(device->card->device, orb->response_bus))
Stefan Richter7aa48482007-07-02 21:04:44 +0200579 goto fail_mapping_response;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500580
Stefan Richter71ee9f02008-02-28 20:51:11 +0100581 orb->request.response.high = 0;
582 orb->request.response.low = cpu_to_be32(orb->response_bus);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500583
Stefan Richter71ee9f02008-02-28 20:51:11 +0100584 orb->request.misc = cpu_to_be32(
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400585 MANAGEMENT_ORB_NOTIFY |
586 MANAGEMENT_ORB_FUNCTION(function) |
Stefan Richter71ee9f02008-02-28 20:51:11 +0100587 MANAGEMENT_ORB_LUN(lun_or_login_id));
588 orb->request.length = cpu_to_be32(
589 MANAGEMENT_ORB_RESPONSE_LENGTH(sizeof(orb->response)));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500590
Stefan Richter71ee9f02008-02-28 20:51:11 +0100591 orb->request.status_fifo.high =
592 cpu_to_be32(lu->address_handler.offset >> 32);
593 orb->request.status_fifo.low =
594 cpu_to_be32(lu->address_handler.offset);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500595
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500596 if (function == SBP2_LOGIN_REQUEST) {
Stefan Richter14dc9922008-01-20 01:25:31 +0100597 /* Ask for 2^2 == 4 seconds reconnect grace period */
Stefan Richter71ee9f02008-02-28 20:51:11 +0100598 orb->request.misc |= cpu_to_be32(
Stefan Richter14dc9922008-01-20 01:25:31 +0100599 MANAGEMENT_ORB_RECONNECT(2) |
Stefan Richter71ee9f02008-02-28 20:51:11 +0100600 MANAGEMENT_ORB_EXCLUSIVE(sbp2_param_exclusive_login));
Jarod Wilson384170d2008-01-25 23:31:12 -0500601 timeout = lu->tgt->mgt_orb_timeout;
Jarod Wilsona4c379c2008-01-19 13:15:05 +0100602 } else {
603 timeout = SBP2_ORB_TIMEOUT;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500604 }
605
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500606 init_completion(&orb->done);
607 orb->base.callback = complete_management_orb;
Kristian Høgsberg2aaad972007-03-07 12:12:47 -0500608
Stefan Richter7aa48482007-07-02 21:04:44 +0200609 orb->base.request_bus =
610 dma_map_single(device->card->device, &orb->request,
611 sizeof(orb->request), DMA_TO_DEVICE);
FUJITA Tomonori8d8bb392008-07-25 19:44:49 -0700612 if (dma_mapping_error(device->card->device, orb->base.request_bus))
Stefan Richter7aa48482007-07-02 21:04:44 +0200613 goto fail_mapping_request;
614
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200615 sbp2_send_orb(&orb->base, lu, node_id, generation,
616 lu->tgt->management_agent_address);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500617
Jarod Wilsona4c379c2008-01-19 13:15:05 +0100618 wait_for_completion_timeout(&orb->done, msecs_to_jiffies(timeout));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500619
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500620 retval = -EIO;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200621 if (sbp2_cancel_orbs(lu) == 0) {
Stefan Richter48f18c72008-02-03 23:09:50 +0100622 fw_error("%s: orb reply timed out, rcode=0x%02x\n",
623 lu->tgt->bus_id, orb->base.rcode);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500624 goto out;
625 }
626
Kristian Høgsberg2aaad972007-03-07 12:12:47 -0500627 if (orb->base.rcode != RCODE_COMPLETE) {
Stefan Richter48f18c72008-02-03 23:09:50 +0100628 fw_error("%s: management write failed, rcode 0x%02x\n",
629 lu->tgt->bus_id, orb->base.rcode);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500630 goto out;
631 }
632
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400633 if (STATUS_GET_RESPONSE(orb->status) != 0 ||
634 STATUS_GET_SBP_STATUS(orb->status) != 0) {
Stefan Richter48f18c72008-02-03 23:09:50 +0100635 fw_error("%s: error status: %d:%d\n", lu->tgt->bus_id,
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400636 STATUS_GET_RESPONSE(orb->status),
637 STATUS_GET_SBP_STATUS(orb->status));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500638 goto out;
639 }
640
641 retval = 0;
642 out:
643 dma_unmap_single(device->card->device, orb->base.request_bus,
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400644 sizeof(orb->request), DMA_TO_DEVICE);
Stefan Richter7aa48482007-07-02 21:04:44 +0200645 fail_mapping_request:
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500646 dma_unmap_single(device->card->device, orb->response_bus,
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400647 sizeof(orb->response), DMA_FROM_DEVICE);
Stefan Richter7aa48482007-07-02 21:04:44 +0200648 fail_mapping_response:
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500649 if (response)
Stefan Richter71ee9f02008-02-28 20:51:11 +0100650 memcpy(response, orb->response, sizeof(orb->response));
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400651 kref_put(&orb->base.kref, free_orb);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500652
653 return retval;
654}
655
Stefan Richtere0e60212008-02-03 23:08:58 +0100656static void sbp2_agent_reset(struct sbp2_logical_unit *lu)
657{
Stefan Richtere5110d02009-06-06 18:35:27 +0200658 struct fw_device *device = target_device(lu->tgt);
Jay Fenlason1e119fa2008-07-20 14:20:53 +0200659 __be32 d = 0;
Stefan Richtere0e60212008-02-03 23:08:58 +0100660
Jay Fenlason1e119fa2008-07-20 14:20:53 +0200661 fw_run_transaction(device->card, TCODE_WRITE_QUADLET_REQUEST,
662 lu->tgt->node_id, lu->generation, device->max_speed,
663 lu->command_block_agent_address + SBP2_AGENT_RESET,
664 &d, sizeof(d));
Stefan Richtere0e60212008-02-03 23:08:58 +0100665}
666
Stefan Richter53dca512008-12-14 21:47:04 +0100667static void complete_agent_reset_write_no_wait(struct fw_card *card,
668 int rcode, void *payload, size_t length, void *data)
Stefan Richtere0e60212008-02-03 23:08:58 +0100669{
670 kfree(data);
671}
672
673static void sbp2_agent_reset_no_wait(struct sbp2_logical_unit *lu)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500674{
Stefan Richtere5110d02009-06-06 18:35:27 +0200675 struct fw_device *device = target_device(lu->tgt);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500676 struct fw_transaction *t;
Jay Fenlason1e119fa2008-07-20 14:20:53 +0200677 static __be32 d;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500678
Stefan Richtere0e60212008-02-03 23:08:58 +0100679 t = kmalloc(sizeof(*t), GFP_ATOMIC);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500680 if (t == NULL)
Stefan Richtere0e60212008-02-03 23:08:58 +0100681 return;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500682
683 fw_send_request(device->card, t, TCODE_WRITE_QUADLET_REQUEST,
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200684 lu->tgt->node_id, lu->generation, device->max_speed,
685 lu->command_block_agent_address + SBP2_AGENT_RESET,
Jay Fenlason1e119fa2008-07-20 14:20:53 +0200686 &d, sizeof(d), complete_agent_reset_write_no_wait, t);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500687}
688
Stefan Richter2e2705b2008-02-16 16:37:28 +0100689static inline void sbp2_allow_block(struct sbp2_logical_unit *lu)
690{
691 /*
692 * We may access dont_block without taking card->lock here:
693 * All callers of sbp2_allow_block() and all callers of sbp2_unblock()
694 * are currently serialized against each other.
695 * And a wrong result in sbp2_conditionally_block()'s access of
696 * dont_block is rather harmless, it simply misses its first chance.
697 */
698 --lu->tgt->dont_block;
699}
700
701/*
702 * Blocks lu->tgt if all of the following conditions are met:
703 * - Login, INQUIRY, and high-level SCSI setup of all of the target's
704 * logical units have been finished (indicated by dont_block == 0).
705 * - lu->generation is stale.
706 *
707 * Note, scsi_block_requests() must be called while holding card->lock,
708 * otherwise it might foil sbp2_[conditionally_]unblock()'s attempt to
709 * unblock the target.
710 */
711static void sbp2_conditionally_block(struct sbp2_logical_unit *lu)
712{
713 struct sbp2_target *tgt = lu->tgt;
Stefan Richtere5110d02009-06-06 18:35:27 +0200714 struct fw_card *card = target_device(tgt)->card;
Stefan Richter2e2705b2008-02-16 16:37:28 +0100715 struct Scsi_Host *shost =
716 container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
717 unsigned long flags;
718
719 spin_lock_irqsave(&card->lock, flags);
720 if (!tgt->dont_block && !lu->blocked &&
721 lu->generation != card->generation) {
722 lu->blocked = true;
Stefan Richtera5fd9ec2008-02-28 20:53:45 +0100723 if (++tgt->blocked == 1)
Stefan Richter2e2705b2008-02-16 16:37:28 +0100724 scsi_block_requests(shost);
Stefan Richter2e2705b2008-02-16 16:37:28 +0100725 }
726 spin_unlock_irqrestore(&card->lock, flags);
727}
728
729/*
730 * Unblocks lu->tgt as soon as all its logical units can be unblocked.
731 * Note, it is harmless to run scsi_unblock_requests() outside the
732 * card->lock protected section. On the other hand, running it inside
733 * the section might clash with shost->host_lock.
734 */
735static void sbp2_conditionally_unblock(struct sbp2_logical_unit *lu)
736{
737 struct sbp2_target *tgt = lu->tgt;
Stefan Richtere5110d02009-06-06 18:35:27 +0200738 struct fw_card *card = target_device(tgt)->card;
Stefan Richter2e2705b2008-02-16 16:37:28 +0100739 struct Scsi_Host *shost =
740 container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
741 unsigned long flags;
742 bool unblock = false;
743
744 spin_lock_irqsave(&card->lock, flags);
745 if (lu->blocked && lu->generation == card->generation) {
746 lu->blocked = false;
747 unblock = --tgt->blocked == 0;
748 }
749 spin_unlock_irqrestore(&card->lock, flags);
750
Stefan Richtera5fd9ec2008-02-28 20:53:45 +0100751 if (unblock)
Stefan Richter2e2705b2008-02-16 16:37:28 +0100752 scsi_unblock_requests(shost);
Stefan Richter2e2705b2008-02-16 16:37:28 +0100753}
754
755/*
756 * Prevents future blocking of tgt and unblocks it.
757 * Note, it is harmless to run scsi_unblock_requests() outside the
758 * card->lock protected section. On the other hand, running it inside
759 * the section might clash with shost->host_lock.
760 */
761static void sbp2_unblock(struct sbp2_target *tgt)
762{
Stefan Richtere5110d02009-06-06 18:35:27 +0200763 struct fw_card *card = target_device(tgt)->card;
Stefan Richter2e2705b2008-02-16 16:37:28 +0100764 struct Scsi_Host *shost =
765 container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
766 unsigned long flags;
767
768 spin_lock_irqsave(&card->lock, flags);
769 ++tgt->dont_block;
770 spin_unlock_irqrestore(&card->lock, flags);
771
772 scsi_unblock_requests(shost);
773}
774
Stefan Richterf8436152008-02-26 23:30:02 +0100775static int sbp2_lun2int(u16 lun)
776{
777 struct scsi_lun eight_bytes_lun;
778
779 memset(&eight_bytes_lun, 0, sizeof(eight_bytes_lun));
780 eight_bytes_lun.scsi_lun[0] = (lun >> 8) & 0xff;
781 eight_bytes_lun.scsi_lun[1] = lun & 0xff;
782
783 return scsilun_to_int(&eight_bytes_lun);
784}
785
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200786static void sbp2_release_target(struct kref *kref)
Kristian Høgsbergb3d6e152007-03-14 17:34:58 -0400787{
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200788 struct sbp2_target *tgt = container_of(kref, struct sbp2_target, kref);
789 struct sbp2_logical_unit *lu, *next;
790 struct Scsi_Host *shost =
791 container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
Stefan Richterf8436152008-02-26 23:30:02 +0100792 struct scsi_device *sdev;
Stefan Richtere5110d02009-06-06 18:35:27 +0200793 struct fw_device *device = target_device(tgt);
Kristian Høgsbergb3d6e152007-03-14 17:34:58 -0400794
Stefan Richter2e2705b2008-02-16 16:37:28 +0100795 /* prevent deadlocks */
796 sbp2_unblock(tgt);
797
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200798 list_for_each_entry_safe(lu, next, &tgt->lu_list, link) {
Stefan Richterf8436152008-02-26 23:30:02 +0100799 sdev = scsi_device_lookup(shost, 0, 0, sbp2_lun2int(lu->lun));
800 if (sdev) {
801 scsi_remove_device(sdev);
802 scsi_device_put(sdev);
Stefan Richter33f1c6c2008-02-19 09:05:49 +0100803 }
Jay Fenlasoncd1f70fd2008-10-24 15:26:20 -0400804 if (lu->login_id != INVALID_LOGIN_ID) {
805 int generation, node_id;
806 /*
807 * tgt->node_id may be obsolete here if we failed
808 * during initial login or after a bus reset where
809 * the topology changed.
810 */
811 generation = device->generation;
812 smp_rmb(); /* node_id vs. generation */
813 node_id = device->node_id;
814 sbp2_send_management_orb(lu, node_id, generation,
815 SBP2_LOGOUT_REQUEST,
816 lu->login_id, NULL);
817 }
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200818 fw_core_remove_address_handler(&lu->address_handler);
819 list_del(&lu->link);
820 kfree(lu);
821 }
822 scsi_remove_host(shost);
Stefan Richterf32ddad2008-04-24 23:17:47 +0200823 fw_notify("released %s, target %d:0:0\n", tgt->bus_id, shost->host_no);
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200824
Stefan Richter1dc3bea2008-02-24 19:01:21 +0100825 fw_unit_put(tgt->unit);
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200826 scsi_host_put(shost);
Stefan Richter855c6032008-02-27 22:14:27 +0100827 fw_device_put(device);
Kristian Høgsbergb3d6e152007-03-14 17:34:58 -0400828}
829
Stefan Richterdf8ec242007-08-12 12:51:18 +0200830static struct workqueue_struct *sbp2_wq;
831
Jay Fenlasoncd1f70fd2008-10-24 15:26:20 -0400832static void sbp2_target_put(struct sbp2_target *tgt)
833{
834 kref_put(&tgt->kref, sbp2_release_target);
835}
836
Stefan Richter285838e2007-11-07 01:12:51 +0100837/*
838 * Always get the target's kref when scheduling work on one its units.
839 * Each workqueue job is responsible to call sbp2_target_put() upon return.
840 */
841static void sbp2_queue_work(struct sbp2_logical_unit *lu, unsigned long delay)
842{
Jay Fenlasoncd1f70fd2008-10-24 15:26:20 -0400843 kref_get(&lu->tgt->kref);
844 if (!queue_delayed_work(sbp2_wq, &lu->work, delay))
845 sbp2_target_put(lu->tgt);
Stefan Richter285838e2007-11-07 01:12:51 +0100846}
847
Jarod Wilson17cff9f2008-03-07 01:43:31 -0500848/*
849 * Write retransmit retry values into the BUSY_TIMEOUT register.
850 * - The single-phase retry protocol is supported by all SBP-2 devices, but the
851 * default retry_limit value is 0 (i.e. never retry transmission). We write a
852 * saner value after logging into the device.
853 * - The dual-phase retry protocol is optional to implement, and if not
854 * supported, writes to the dual-phase portion of the register will be
855 * ignored. We try to write the original 1394-1995 default here.
856 * - In the case of devices that are also SBP-3-compliant, all writes are
857 * ignored, as the register is read-only, but contains single-phase retry of
858 * 15, which is what we're trying to set for all SBP-2 device anyway, so this
859 * write attempt is safe and yields more consistent behavior for all devices.
860 *
861 * See section 8.3.2.3.5 of the 1394-1995 spec, section 6.2 of the SBP-2 spec,
862 * and section 6.4 of the SBP-3 spec for further details.
863 */
Jarod Wilson51f9dbe2008-03-07 01:43:01 -0500864static void sbp2_set_busy_timeout(struct sbp2_logical_unit *lu)
865{
Stefan Richtere5110d02009-06-06 18:35:27 +0200866 struct fw_device *device = target_device(lu->tgt);
Jay Fenlason1e119fa2008-07-20 14:20:53 +0200867 __be32 d = cpu_to_be32(SBP2_CYCLE_LIMIT | SBP2_RETRY_LIMIT);
Jarod Wilson51f9dbe2008-03-07 01:43:01 -0500868
Jay Fenlason1e119fa2008-07-20 14:20:53 +0200869 fw_run_transaction(device->card, TCODE_WRITE_QUADLET_REQUEST,
870 lu->tgt->node_id, lu->generation, device->max_speed,
871 CSR_REGISTER_BASE + CSR_BUSY_TIMEOUT,
872 &d, sizeof(d));
Jarod Wilson51f9dbe2008-03-07 01:43:01 -0500873}
874
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200875static void sbp2_reconnect(struct work_struct *work);
876
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500877static void sbp2_login(struct work_struct *work)
878{
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200879 struct sbp2_logical_unit *lu =
880 container_of(work, struct sbp2_logical_unit, work.work);
Stefan Richter48f18c72008-02-03 23:09:50 +0100881 struct sbp2_target *tgt = lu->tgt;
Stefan Richtere5110d02009-06-06 18:35:27 +0200882 struct fw_device *device = target_device(tgt);
Stefan Richter48f18c72008-02-03 23:09:50 +0100883 struct Scsi_Host *shost;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200884 struct scsi_device *sdev;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500885 struct sbp2_login_response response;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200886 int generation, node_id, local_node_id;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500887
Stefan Richterbe6f48b2008-01-27 19:14:44 +0100888 if (fw_device_is_shutdown(device))
889 goto out;
890
Stefan Richter5a8a1bc2008-01-24 01:53:19 +0100891 generation = device->generation;
Stefan Richter621f6dd2008-10-26 11:04:20 +0100892 smp_rmb(); /* node IDs must not be older than generation */
Stefan Richter5a8a1bc2008-01-24 01:53:19 +0100893 node_id = device->node_id;
894 local_node_id = device->card->node_id;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500895
Stefan Richterce896d92008-02-03 23:11:39 +0100896 /* If this is a re-login attempt, log out, or we might be rejected. */
Stefan Richterf8436152008-02-26 23:30:02 +0100897 if (lu->has_sdev)
Stefan Richterce896d92008-02-03 23:11:39 +0100898 sbp2_send_management_orb(lu, device->node_id, generation,
899 SBP2_LOGOUT_REQUEST, lu->login_id, NULL);
900
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200901 if (sbp2_send_management_orb(lu, node_id, generation,
902 SBP2_LOGIN_REQUEST, lu->lun, &response) < 0) {
Stefan Richter2e2705b2008-02-16 16:37:28 +0100903 if (lu->retries++ < 5) {
Stefan Richter285838e2007-11-07 01:12:51 +0100904 sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5));
Stefan Richter2e2705b2008-02-16 16:37:28 +0100905 } else {
Stefan Richter48f18c72008-02-03 23:09:50 +0100906 fw_error("%s: failed to login to LUN %04x\n",
907 tgt->bus_id, lu->lun);
Stefan Richter2e2705b2008-02-16 16:37:28 +0100908 /* Let any waiting I/O fail from now on. */
909 sbp2_unblock(lu->tgt);
910 }
Stefan Richter285838e2007-11-07 01:12:51 +0100911 goto out;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500912 }
913
Stefan Richter48f18c72008-02-03 23:09:50 +0100914 tgt->node_id = node_id;
915 tgt->address_high = local_node_id << 16;
Stefan Richter621f6dd2008-10-26 11:04:20 +0100916 smp_wmb(); /* node IDs must not be older than generation */
917 lu->generation = generation;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500918
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200919 lu->command_block_agent_address =
Stefan Richter71ee9f02008-02-28 20:51:11 +0100920 ((u64)(be32_to_cpu(response.command_block_agent.high) & 0xffff)
921 << 32) | be32_to_cpu(response.command_block_agent.low);
922 lu->login_id = be32_to_cpu(response.misc) & 0xffff;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500923
Stefan Richter48f18c72008-02-03 23:09:50 +0100924 fw_notify("%s: logged in to LUN %04x (%d retries)\n",
925 tgt->bus_id, lu->lun, lu->retries);
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500926
Jarod Wilson51f9dbe2008-03-07 01:43:01 -0500927 /* set appropriate retry limit(s) in BUSY_TIMEOUT register */
928 sbp2_set_busy_timeout(lu);
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500929
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200930 PREPARE_DELAYED_WORK(&lu->work, sbp2_reconnect);
931 sbp2_agent_reset(lu);
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500932
Stefan Richter0fa6dfd2008-02-03 23:10:47 +0100933 /* This was a re-login. */
Stefan Richterf8436152008-02-26 23:30:02 +0100934 if (lu->has_sdev) {
Stefan Richter0fa6dfd2008-02-03 23:10:47 +0100935 sbp2_cancel_orbs(lu);
Stefan Richter2e2705b2008-02-16 16:37:28 +0100936 sbp2_conditionally_unblock(lu);
Stefan Richter0fa6dfd2008-02-03 23:10:47 +0100937 goto out;
938 }
939
Stefan Richter9220f192008-02-03 23:04:38 +0100940 if (lu->tgt->workarounds & SBP2_WORKAROUND_DELAY_INQUIRY)
941 ssleep(SBP2_INQUIRY_DELAY);
942
Stefan Richter48f18c72008-02-03 23:09:50 +0100943 shost = container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
Stefan Richterf8436152008-02-26 23:30:02 +0100944 sdev = __scsi_add_device(shost, 0, 0, sbp2_lun2int(lu->lun), lu);
Stefan Richtere80de372008-02-15 21:29:02 +0100945 /*
946 * FIXME: We are unable to perform reconnects while in sbp2_login().
947 * Therefore __scsi_add_device() will get into trouble if a bus reset
948 * happens in parallel. It will either fail or leave us with an
949 * unusable sdev. As a workaround we check for this and retry the
950 * whole login and SCSI probing.
951 */
Stefan Richter1b9c12b2008-01-26 17:43:23 +0100952
Stefan Richtere80de372008-02-15 21:29:02 +0100953 /* Reported error during __scsi_add_device() */
954 if (IS_ERR(sdev))
955 goto out_logout_login;
956
Stefan Richtere80de372008-02-15 21:29:02 +0100957 /* Unreported error during __scsi_add_device() */
958 smp_rmb(); /* get current card generation */
959 if (generation != device->card->generation) {
960 scsi_remove_device(sdev);
Stefan Richter33f1c6c2008-02-19 09:05:49 +0100961 scsi_device_put(sdev);
Stefan Richtere80de372008-02-15 21:29:02 +0100962 goto out_logout_login;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500963 }
Stefan Richtere80de372008-02-15 21:29:02 +0100964
965 /* No error during __scsi_add_device() */
Stefan Richterf8436152008-02-26 23:30:02 +0100966 lu->has_sdev = true;
967 scsi_device_put(sdev);
Stefan Richter2e2705b2008-02-16 16:37:28 +0100968 sbp2_allow_block(lu);
Stefan Richtere80de372008-02-15 21:29:02 +0100969 goto out;
970
971 out_logout_login:
972 smp_rmb(); /* generation may have changed */
973 generation = device->generation;
974 smp_rmb(); /* node_id must not be older than generation */
975
976 sbp2_send_management_orb(lu, device->node_id, generation,
977 SBP2_LOGOUT_REQUEST, lu->login_id, NULL);
978 /*
979 * If a bus reset happened, sbp2_update will have requeued
980 * lu->work already. Reset the work from reconnect to login.
981 */
982 PREPARE_DELAYED_WORK(&lu->work, sbp2_login);
Stefan Richter285838e2007-11-07 01:12:51 +0100983 out:
Stefan Richter48f18c72008-02-03 23:09:50 +0100984 sbp2_target_put(tgt);
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500985}
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500986
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200987static int sbp2_add_logical_unit(struct sbp2_target *tgt, int lun_entry)
988{
989 struct sbp2_logical_unit *lu;
990
991 lu = kmalloc(sizeof(*lu), GFP_KERNEL);
992 if (!lu)
993 return -ENOMEM;
994
995 lu->address_handler.length = 0x100;
996 lu->address_handler.address_callback = sbp2_status_write;
997 lu->address_handler.callback_data = lu;
998
999 if (fw_core_add_address_handler(&lu->address_handler,
1000 &fw_high_memory_region) < 0) {
1001 kfree(lu);
1002 return -ENOMEM;
1003 }
1004
Stefan Richterf8436152008-02-26 23:30:02 +01001005 lu->tgt = tgt;
1006 lu->lun = lun_entry & 0xffff;
Jay Fenlasoncd1f70fd2008-10-24 15:26:20 -04001007 lu->login_id = INVALID_LOGIN_ID;
Stefan Richterf8436152008-02-26 23:30:02 +01001008 lu->retries = 0;
1009 lu->has_sdev = false;
1010 lu->blocked = false;
Stefan Richter2e2705b2008-02-16 16:37:28 +01001011 ++tgt->dont_block;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001012 INIT_LIST_HEAD(&lu->orb_list);
1013 INIT_DELAYED_WORK(&lu->work, sbp2_login);
1014
1015 list_add_tail(&lu->link, &tgt->lu_list);
1016 return 0;
1017}
1018
1019static int sbp2_scan_logical_unit_dir(struct sbp2_target *tgt, u32 *directory)
1020{
1021 struct fw_csr_iterator ci;
1022 int key, value;
1023
1024 fw_csr_iterator_init(&ci, directory);
1025 while (fw_csr_iterator_next(&ci, &key, &value))
1026 if (key == SBP2_CSR_LOGICAL_UNIT_NUMBER &&
1027 sbp2_add_logical_unit(tgt, value) < 0)
1028 return -ENOMEM;
1029 return 0;
1030}
1031
1032static int sbp2_scan_unit_dir(struct sbp2_target *tgt, u32 *directory,
1033 u32 *model, u32 *firmware_revision)
1034{
1035 struct fw_csr_iterator ci;
1036 int key, value;
Jarod Wilson384170d2008-01-25 23:31:12 -05001037 unsigned int timeout;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001038
1039 fw_csr_iterator_init(&ci, directory);
1040 while (fw_csr_iterator_next(&ci, &key, &value)) {
1041 switch (key) {
1042
1043 case CSR_DEPENDENT_INFO | CSR_OFFSET:
1044 tgt->management_agent_address =
1045 CSR_REGISTER_BASE + 4 * value;
1046 break;
1047
1048 case CSR_DIRECTORY_ID:
1049 tgt->directory_id = value;
1050 break;
1051
1052 case CSR_MODEL:
1053 *model = value;
1054 break;
1055
1056 case SBP2_CSR_FIRMWARE_REVISION:
1057 *firmware_revision = value;
1058 break;
1059
Jarod Wilson384170d2008-01-25 23:31:12 -05001060 case SBP2_CSR_UNIT_CHARACTERISTICS:
1061 /* the timeout value is stored in 500ms units */
1062 timeout = ((unsigned int) value >> 8 & 0xff) * 500;
1063 timeout = max(timeout, SBP2_MIN_LOGIN_ORB_TIMEOUT);
1064 tgt->mgt_orb_timeout =
1065 min(timeout, SBP2_MAX_LOGIN_ORB_TIMEOUT);
1066
1067 if (timeout > tgt->mgt_orb_timeout)
1068 fw_notify("%s: config rom contains %ds "
1069 "management ORB timeout, limiting "
Stefan Richter48f18c72008-02-03 23:09:50 +01001070 "to %ds\n", tgt->bus_id,
Jarod Wilson384170d2008-01-25 23:31:12 -05001071 timeout / 1000,
1072 tgt->mgt_orb_timeout / 1000);
1073 break;
1074
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001075 case SBP2_CSR_LOGICAL_UNIT_NUMBER:
1076 if (sbp2_add_logical_unit(tgt, value) < 0)
1077 return -ENOMEM;
1078 break;
1079
1080 case SBP2_CSR_LOGICAL_UNIT_DIRECTORY:
Richard Sharpe0e3e2ea2008-06-24 19:11:13 -07001081 /* Adjust for the increment in the iterator */
1082 if (sbp2_scan_logical_unit_dir(tgt, ci.p - 1 + value) < 0)
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001083 return -ENOMEM;
1084 break;
1085 }
1086 }
1087 return 0;
1088}
1089
1090static void sbp2_init_workarounds(struct sbp2_target *tgt, u32 model,
1091 u32 firmware_revision)
1092{
1093 int i;
Stefan Richter05cca732008-01-26 17:42:45 +01001094 unsigned int w = sbp2_param_workarounds;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001095
Stefan Richter2df222b2007-08-13 17:48:25 +02001096 if (w)
1097 fw_notify("Please notify linux1394-devel@lists.sourceforge.net "
1098 "if you need the workarounds parameter for %s\n",
Stefan Richter48f18c72008-02-03 23:09:50 +01001099 tgt->bus_id);
Stefan Richter2df222b2007-08-13 17:48:25 +02001100
1101 if (w & SBP2_WORKAROUND_OVERRIDE)
1102 goto out;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001103
1104 for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) {
1105
1106 if (sbp2_workarounds_table[i].firmware_revision !=
1107 (firmware_revision & 0xffffff00))
1108 continue;
1109
1110 if (sbp2_workarounds_table[i].model != model &&
Stefan Richterf7460722009-01-24 19:41:46 +01001111 sbp2_workarounds_table[i].model != SBP2_ROM_VALUE_WILDCARD)
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001112 continue;
1113
Stefan Richter2df222b2007-08-13 17:48:25 +02001114 w |= sbp2_workarounds_table[i].workarounds;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001115 break;
1116 }
Stefan Richter2df222b2007-08-13 17:48:25 +02001117 out:
1118 if (w)
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001119 fw_notify("Workarounds for %s: 0x%x "
1120 "(firmware_revision 0x%06x, model_id 0x%06x)\n",
Stefan Richter48f18c72008-02-03 23:09:50 +01001121 tgt->bus_id, w, firmware_revision, model);
Stefan Richter2df222b2007-08-13 17:48:25 +02001122 tgt->workarounds = w;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001123}
1124
1125static struct scsi_host_template scsi_driver_template;
1126
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001127static int sbp2_probe(struct device *dev)
1128{
1129 struct fw_unit *unit = fw_unit(dev);
Stefan Richtere5110d02009-06-06 18:35:27 +02001130 struct fw_device *device = fw_parent_device(unit);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001131 struct sbp2_target *tgt;
1132 struct sbp2_logical_unit *lu;
1133 struct Scsi_Host *shost;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001134 u32 model, firmware_revision;
1135
Stefan Richter09b12dd2008-08-14 21:47:21 +02001136 if (dma_get_max_seg_size(device->card->device) > SBP2_MAX_SEG_SIZE)
1137 BUG_ON(dma_set_max_seg_size(device->card->device,
1138 SBP2_MAX_SEG_SIZE));
1139
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001140 shost = scsi_host_alloc(&scsi_driver_template, sizeof(*tgt));
1141 if (shost == NULL)
1142 return -ENOMEM;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001143
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001144 tgt = (struct sbp2_target *)shost->hostdata;
Greg Kroah-Hartmand9614502009-04-30 14:43:31 -07001145 dev_set_drvdata(&unit->device, tgt);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001146 tgt->unit = unit;
1147 kref_init(&tgt->kref);
1148 INIT_LIST_HEAD(&tgt->lu_list);
Kay Sieversa1f64812008-10-30 01:41:56 +01001149 tgt->bus_id = dev_name(&unit->device);
Stefan Richterc9755e12008-03-24 20:54:28 +01001150 tgt->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4];
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001151
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001152 if (fw_device_enable_phys_dma(device) < 0)
1153 goto fail_shost_put;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001154
Stefan Richteraf271942009-06-30 20:27:59 +02001155 shost->max_cmd_len = SBP2_MAX_CDB_SIZE;
1156
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001157 if (scsi_add_host(shost, &unit->device) < 0)
1158 goto fail_shost_put;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001159
Stefan Richter855c6032008-02-27 22:14:27 +01001160 fw_device_get(device);
Stefan Richter1dc3bea2008-02-24 19:01:21 +01001161 fw_unit_get(unit);
Stefan Richter855c6032008-02-27 22:14:27 +01001162
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001163 /* implicit directory ID */
1164 tgt->directory_id = ((unit->directory - device->config_rom) * 4
1165 + CSR_CONFIG_ROM) & 0xffffff;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001166
Stefan Richterf7460722009-01-24 19:41:46 +01001167 firmware_revision = SBP2_ROM_VALUE_MISSING;
1168 model = SBP2_ROM_VALUE_MISSING;
1169
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001170 if (sbp2_scan_unit_dir(tgt, unit->directory, &model,
1171 &firmware_revision) < 0)
1172 goto fail_tgt_put;
1173
1174 sbp2_init_workarounds(tgt, model, firmware_revision);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001175
Stefan Richtera08e1002009-01-24 19:41:46 +01001176 /*
1177 * At S100 we can do 512 bytes per packet, at S200 1024 bytes,
1178 * and so on up to 4096 bytes. The SBP-2 max_payload field
1179 * specifies the max payload size as 2 ^ (max_payload + 2), so
1180 * if we set this to max_speed + 7, we get the right value.
1181 */
1182 tgt->max_payload = min(device->max_speed + 7, 10U);
1183 tgt->max_payload = min(tgt->max_payload, device->card->max_receive - 1);
1184
Stefan Richter285838e2007-11-07 01:12:51 +01001185 /* Do the login in a workqueue so we can easily reschedule retries. */
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001186 list_for_each_entry(lu, &tgt->lu_list, link)
Stefan Richter0dcfeb72008-10-22 00:28:36 +02001187 sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001188 return 0;
Kristian Høgsbergad852742007-05-09 19:23:07 -04001189
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001190 fail_tgt_put:
Stefan Richter285838e2007-11-07 01:12:51 +01001191 sbp2_target_put(tgt);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001192 return -ENOMEM;
1193
1194 fail_shost_put:
1195 scsi_host_put(shost);
1196 return -ENOMEM;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001197}
1198
1199static int sbp2_remove(struct device *dev)
1200{
1201 struct fw_unit *unit = fw_unit(dev);
Greg Kroah-Hartmand9614502009-04-30 14:43:31 -07001202 struct sbp2_target *tgt = dev_get_drvdata(&unit->device);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001203
Stefan Richter285838e2007-11-07 01:12:51 +01001204 sbp2_target_put(tgt);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001205 return 0;
1206}
1207
1208static void sbp2_reconnect(struct work_struct *work)
1209{
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001210 struct sbp2_logical_unit *lu =
1211 container_of(work, struct sbp2_logical_unit, work.work);
Stefan Richter48f18c72008-02-03 23:09:50 +01001212 struct sbp2_target *tgt = lu->tgt;
Stefan Richtere5110d02009-06-06 18:35:27 +02001213 struct fw_device *device = target_device(tgt);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001214 int generation, node_id, local_node_id;
1215
Stefan Richterbe6f48b2008-01-27 19:14:44 +01001216 if (fw_device_is_shutdown(device))
1217 goto out;
1218
Stefan Richter5a8a1bc2008-01-24 01:53:19 +01001219 generation = device->generation;
Stefan Richter621f6dd2008-10-26 11:04:20 +01001220 smp_rmb(); /* node IDs must not be older than generation */
Stefan Richter5a8a1bc2008-01-24 01:53:19 +01001221 node_id = device->node_id;
1222 local_node_id = device->card->node_id;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001223
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001224 if (sbp2_send_management_orb(lu, node_id, generation,
Kristian Høgsberg7f37c422007-02-06 14:49:34 -05001225 SBP2_RECONNECT_REQUEST,
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001226 lu->login_id, NULL) < 0) {
Stefan Richterce896d92008-02-03 23:11:39 +01001227 /*
1228 * If reconnect was impossible even though we are in the
1229 * current generation, fall back and try to log in again.
1230 *
1231 * We could check for "Function rejected" status, but
1232 * looking at the bus generation as simpler and more general.
1233 */
1234 smp_rmb(); /* get current card generation */
1235 if (generation == device->card->generation ||
1236 lu->retries++ >= 5) {
Stefan Richter48f18c72008-02-03 23:09:50 +01001237 fw_error("%s: failed to reconnect\n", tgt->bus_id);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001238 lu->retries = 0;
1239 PREPARE_DELAYED_WORK(&lu->work, sbp2_login);
Kristian Høgsberg7f37c422007-02-06 14:49:34 -05001240 }
Stefan Richter285838e2007-11-07 01:12:51 +01001241 sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5));
1242 goto out;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -05001243 }
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001244
Stefan Richter48f18c72008-02-03 23:09:50 +01001245 tgt->node_id = node_id;
1246 tgt->address_high = local_node_id << 16;
Stefan Richter621f6dd2008-10-26 11:04:20 +01001247 smp_wmb(); /* node IDs must not be older than generation */
1248 lu->generation = generation;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -05001249
Stefan Richter48f18c72008-02-03 23:09:50 +01001250 fw_notify("%s: reconnected to LUN %04x (%d retries)\n",
1251 tgt->bus_id, lu->lun, lu->retries);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001252
1253 sbp2_agent_reset(lu);
1254 sbp2_cancel_orbs(lu);
Stefan Richter2e2705b2008-02-16 16:37:28 +01001255 sbp2_conditionally_unblock(lu);
Stefan Richter285838e2007-11-07 01:12:51 +01001256 out:
Stefan Richter48f18c72008-02-03 23:09:50 +01001257 sbp2_target_put(tgt);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001258}
1259
1260static void sbp2_update(struct fw_unit *unit)
1261{
Greg Kroah-Hartmand9614502009-04-30 14:43:31 -07001262 struct sbp2_target *tgt = dev_get_drvdata(&unit->device);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001263 struct sbp2_logical_unit *lu;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001264
Stefan Richtere5110d02009-06-06 18:35:27 +02001265 fw_device_enable_phys_dma(fw_parent_device(unit));
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001266
1267 /*
1268 * Fw-core serializes sbp2_update() against sbp2_remove().
1269 * Iteration over tgt->lu_list is therefore safe here.
1270 */
1271 list_for_each_entry(lu, &tgt->lu_list, link) {
Stefan Richter2e2705b2008-02-16 16:37:28 +01001272 sbp2_conditionally_block(lu);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001273 lu->retries = 0;
Stefan Richter285838e2007-11-07 01:12:51 +01001274 sbp2_queue_work(lu, 0);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001275 }
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001276}
1277
1278#define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e
1279#define SBP2_SW_VERSION_ENTRY 0x00010483
1280
Stefan Richterb3b29882009-02-15 23:12:34 +01001281static const struct ieee1394_device_id sbp2_id_table[] = {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001282 {
Stefan Richterb3b29882009-02-15 23:12:34 +01001283 .match_flags = IEEE1394_MATCH_SPECIFIER_ID |
1284 IEEE1394_MATCH_VERSION,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001285 .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY,
Stefan Richter5af4e5e2007-01-21 20:45:32 +01001286 .version = SBP2_SW_VERSION_ENTRY,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001287 },
1288 { }
1289};
1290
1291static struct fw_driver sbp2_driver = {
1292 .driver = {
1293 .owner = THIS_MODULE,
1294 .name = sbp2_driver_name,
1295 .bus = &fw_bus_type,
1296 .probe = sbp2_probe,
1297 .remove = sbp2_remove,
1298 },
1299 .update = sbp2_update,
1300 .id_table = sbp2_id_table,
1301};
1302
Stefan Richter5e212562009-01-28 01:03:34 +01001303static void sbp2_unmap_scatterlist(struct device *card_device,
1304 struct sbp2_command_orb *orb)
1305{
1306 if (scsi_sg_count(orb->cmd))
1307 dma_unmap_sg(card_device, scsi_sglist(orb->cmd),
1308 scsi_sg_count(orb->cmd),
1309 orb->cmd->sc_data_direction);
1310
1311 if (orb->request.misc & cpu_to_be32(COMMAND_ORB_PAGE_TABLE_PRESENT))
1312 dma_unmap_single(card_device, orb->page_table_bus,
1313 sizeof(orb->page_table), DMA_TO_DEVICE);
1314}
1315
Stefan Richter53dca512008-12-14 21:47:04 +01001316static unsigned int sbp2_status_to_sense_data(u8 *sbp2_status, u8 *sense_data)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001317{
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001318 int sam_status;
1319
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001320 sense_data[0] = 0x70;
1321 sense_data[1] = 0x0;
1322 sense_data[2] = sbp2_status[1];
1323 sense_data[3] = sbp2_status[4];
1324 sense_data[4] = sbp2_status[5];
1325 sense_data[5] = sbp2_status[6];
1326 sense_data[6] = sbp2_status[7];
1327 sense_data[7] = 10;
1328 sense_data[8] = sbp2_status[8];
1329 sense_data[9] = sbp2_status[9];
1330 sense_data[10] = sbp2_status[10];
1331 sense_data[11] = sbp2_status[11];
1332 sense_data[12] = sbp2_status[2];
1333 sense_data[13] = sbp2_status[3];
1334 sense_data[14] = sbp2_status[12];
1335 sense_data[15] = sbp2_status[13];
1336
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001337 sam_status = sbp2_status[0] & 0x3f;
1338
1339 switch (sam_status) {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001340 case SAM_STAT_GOOD:
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001341 case SAM_STAT_CHECK_CONDITION:
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001342 case SAM_STAT_CONDITION_MET:
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001343 case SAM_STAT_BUSY:
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001344 case SAM_STAT_RESERVATION_CONFLICT:
1345 case SAM_STAT_COMMAND_TERMINATED:
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001346 return DID_OK << 16 | sam_status;
1347
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001348 default:
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001349 return DID_ERROR << 16;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001350 }
1351}
1352
Stefan Richter53dca512008-12-14 21:47:04 +01001353static void complete_command_orb(struct sbp2_orb *base_orb,
1354 struct sbp2_status *status)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001355{
Jay Fenlason6f061482007-06-27 16:04:33 -04001356 struct sbp2_command_orb *orb =
1357 container_of(base_orb, struct sbp2_command_orb, base);
Stefan Richtere5110d02009-06-06 18:35:27 +02001358 struct fw_device *device = target_device(orb->lu->tgt);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001359 int result;
1360
1361 if (status != NULL) {
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001362 if (STATUS_GET_DEAD(*status))
Stefan Richtere0e60212008-02-03 23:08:58 +01001363 sbp2_agent_reset_no_wait(orb->lu);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001364
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001365 switch (STATUS_GET_RESPONSE(*status)) {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001366 case SBP2_STATUS_REQUEST_COMPLETE:
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001367 result = DID_OK << 16;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001368 break;
1369 case SBP2_STATUS_TRANSPORT_FAILURE:
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001370 result = DID_BUS_BUSY << 16;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001371 break;
1372 case SBP2_STATUS_ILLEGAL_REQUEST:
1373 case SBP2_STATUS_VENDOR_DEPENDENT:
1374 default:
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001375 result = DID_ERROR << 16;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001376 break;
1377 }
1378
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001379 if (result == DID_OK << 16 && STATUS_GET_LEN(*status) > 1)
1380 result = sbp2_status_to_sense_data(STATUS_GET_DATA(*status),
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001381 orb->cmd->sense_buffer);
1382 } else {
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001383 /*
1384 * If the orb completes with status == NULL, something
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001385 * went wrong, typically a bus reset happened mid-orb
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001386 * or when sending the write (less likely).
1387 */
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001388 result = DID_BUS_BUSY << 16;
Stefan Richter2e2705b2008-02-16 16:37:28 +01001389 sbp2_conditionally_block(orb->lu);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001390 }
1391
1392 dma_unmap_single(device->card->device, orb->base.request_bus,
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -04001393 sizeof(orb->request), DMA_TO_DEVICE);
Stefan Richter5e212562009-01-28 01:03:34 +01001394 sbp2_unmap_scatterlist(device->card->device, orb);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001395
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001396 orb->cmd->result = result;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001397 orb->done(orb->cmd);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001398}
1399
Stefan Richter53dca512008-12-14 21:47:04 +01001400static int sbp2_map_scatterlist(struct sbp2_command_orb *orb,
1401 struct fw_device *device, struct sbp2_logical_unit *lu)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001402{
Stefan Richter09b12dd2008-08-14 21:47:21 +02001403 struct scatterlist *sg = scsi_sglist(orb->cmd);
1404 int i, n;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001405
Stefan Richter09b12dd2008-08-14 21:47:21 +02001406 n = dma_map_sg(device->card->device, sg, scsi_sg_count(orb->cmd),
1407 orb->cmd->sc_data_direction);
1408 if (n == 0)
Kristian Høgsberg95ffc5e2007-05-09 19:23:08 -04001409 goto fail;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001410
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001411 /*
1412 * Handle the special case where there is only one element in
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001413 * the scatter list by converting it to an immediate block
1414 * request. This is also a workaround for broken devices such
1415 * as the second generation iPod which doesn't support page
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001416 * tables.
1417 */
Stefan Richter09b12dd2008-08-14 21:47:21 +02001418 if (n == 1) {
Stefan Richter71ee9f02008-02-28 20:51:11 +01001419 orb->request.data_descriptor.high =
1420 cpu_to_be32(lu->tgt->address_high);
1421 orb->request.data_descriptor.low =
1422 cpu_to_be32(sg_dma_address(sg));
1423 orb->request.misc |=
1424 cpu_to_be32(COMMAND_ORB_DATA_SIZE(sg_dma_len(sg)));
Kristian Høgsberg95ffc5e2007-05-09 19:23:08 -04001425 return 0;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001426 }
1427
Stefan Richter09b12dd2008-08-14 21:47:21 +02001428 for_each_sg(sg, sg, n, i) {
1429 orb->page_table[i].high = cpu_to_be32(sg_dma_len(sg) << 16);
1430 orb->page_table[i].low = cpu_to_be32(sg_dma_address(sg));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001431 }
1432
Stefan Richterb4be0162007-07-02 22:07:34 +02001433 orb->page_table_bus =
1434 dma_map_single(device->card->device, orb->page_table,
1435 sizeof(orb->page_table), DMA_TO_DEVICE);
FUJITA Tomonori8d8bb392008-07-25 19:44:49 -07001436 if (dma_mapping_error(device->card->device, orb->page_table_bus))
Stefan Richterb4be0162007-07-02 22:07:34 +02001437 goto fail_page_table;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001438
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001439 /*
1440 * The data_descriptor pointer is the one case where we need
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001441 * to fill in the node ID part of the address. All other
1442 * pointers assume that the data referenced reside on the
1443 * initiator (i.e. us), but data_descriptor can refer to data
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001444 * on other nodes so we need to put our ID in descriptor.high.
1445 */
Stefan Richter71ee9f02008-02-28 20:51:11 +01001446 orb->request.data_descriptor.high = cpu_to_be32(lu->tgt->address_high);
1447 orb->request.data_descriptor.low = cpu_to_be32(orb->page_table_bus);
1448 orb->request.misc |= cpu_to_be32(COMMAND_ORB_PAGE_TABLE_PRESENT |
Stefan Richter09b12dd2008-08-14 21:47:21 +02001449 COMMAND_ORB_DATA_SIZE(n));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001450
Kristian Høgsberg95ffc5e2007-05-09 19:23:08 -04001451 return 0;
1452
1453 fail_page_table:
Stefan Richter09b12dd2008-08-14 21:47:21 +02001454 dma_unmap_sg(device->card->device, scsi_sglist(orb->cmd),
1455 scsi_sg_count(orb->cmd), orb->cmd->sc_data_direction);
Kristian Høgsberg95ffc5e2007-05-09 19:23:08 -04001456 fail:
1457 return -ENOMEM;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001458}
1459
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001460/* SCSI stack integration */
1461
1462static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done)
1463{
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001464 struct sbp2_logical_unit *lu = cmd->device->hostdata;
Stefan Richtere5110d02009-06-06 18:35:27 +02001465 struct fw_device *device = target_device(lu->tgt);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001466 struct sbp2_command_orb *orb;
Stefan Richter4bbc1bd2008-08-09 20:22:17 +02001467 int generation, retval = SCSI_MLQUEUE_HOST_BUSY;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001468
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001469 /*
1470 * Bidirectional commands are not yet implemented, and unknown
1471 * transfer direction not handled.
1472 */
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001473 if (cmd->sc_data_direction == DMA_BIDIRECTIONAL) {
Stefan Richter8a8cea22007-06-09 19:26:22 +02001474 fw_error("Can't handle DMA_BIDIRECTIONAL, rejecting command\n");
Kristian Høgsberge1b68c42007-05-09 19:23:09 -04001475 cmd->result = DID_ERROR << 16;
1476 done(cmd);
1477 return 0;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001478 }
1479
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -04001480 orb = kzalloc(sizeof(*orb), GFP_ATOMIC);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001481 if (orb == NULL) {
1482 fw_notify("failed to alloc orb\n");
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001483 return SCSI_MLQUEUE_HOST_BUSY;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001484 }
1485
Kristian Høgsberg12f26aa2007-04-10 18:11:20 -04001486 /* Initialize rcode to something not RCODE_COMPLETE. */
1487 orb->base.rcode = -1;
Kristian Høgsberge57d2012007-08-24 18:59:58 -04001488 kref_init(&orb->base.kref);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001489
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001490 orb->lu = lu;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001491 orb->done = done;
1492 orb->cmd = cmd;
1493
Stefan Richtera08e1002009-01-24 19:41:46 +01001494 orb->request.next.high = cpu_to_be32(SBP2_ORB_NULL);
Stefan Richter71ee9f02008-02-28 20:51:11 +01001495 orb->request.misc = cpu_to_be32(
Stefan Richtera08e1002009-01-24 19:41:46 +01001496 COMMAND_ORB_MAX_PAYLOAD(lu->tgt->max_payload) |
Stefan Richterf1397492007-06-10 21:31:36 +02001497 COMMAND_ORB_SPEED(device->max_speed) |
Stefan Richter71ee9f02008-02-28 20:51:11 +01001498 COMMAND_ORB_NOTIFY);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001499
1500 if (cmd->sc_data_direction == DMA_FROM_DEVICE)
Stefan Richter0d7dcbf2008-02-28 20:52:02 +01001501 orb->request.misc |= cpu_to_be32(COMMAND_ORB_DIRECTION);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001502
Stefan Richter4bbc1bd2008-08-09 20:22:17 +02001503 generation = device->generation;
1504 smp_rmb(); /* sbp2_map_scatterlist looks at tgt->address_high */
1505
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001506 if (scsi_sg_count(cmd) && sbp2_map_scatterlist(orb, device, lu) < 0)
1507 goto out;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001508
Boaz Harrosh64a87b22008-04-30 11:19:47 +03001509 memcpy(orb->request.command_block, cmd->cmnd, cmd->cmd_len);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001510
1511 orb->base.callback = complete_command_orb;
Stefan Richter85263922007-07-02 21:04:08 +02001512 orb->base.request_bus =
1513 dma_map_single(device->card->device, &orb->request,
1514 sizeof(orb->request), DMA_TO_DEVICE);
Stefan Richter5e212562009-01-28 01:03:34 +01001515 if (dma_mapping_error(device->card->device, orb->base.request_bus)) {
1516 sbp2_unmap_scatterlist(device->card->device, orb);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001517 goto out;
Stefan Richter5e212562009-01-28 01:03:34 +01001518 }
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001519
Stefan Richter4bbc1bd2008-08-09 20:22:17 +02001520 sbp2_send_orb(&orb->base, lu, lu->tgt->node_id, generation,
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001521 lu->command_block_agent_address + SBP2_ORB_POINTER);
1522 retval = 0;
1523 out:
Kristian Høgsberge57d2012007-08-24 18:59:58 -04001524 kref_put(&orb->base.kref, free_orb);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001525 return retval;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001526}
1527
Stefan Richtercfb01382007-01-23 21:20:08 +01001528static int sbp2_scsi_slave_alloc(struct scsi_device *sdev)
1529{
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001530 struct sbp2_logical_unit *lu = sdev->hostdata;
Stefan Richtercfb01382007-01-23 21:20:08 +01001531
Stefan Richter5513c5f2008-02-17 14:56:19 +01001532 /* (Re-)Adding logical units via the SCSI stack is not supported. */
1533 if (!lu)
1534 return -ENOSYS;
1535
Stefan Richtercfb01382007-01-23 21:20:08 +01001536 sdev->allow_restart = 1;
1537
Stefan Richter8ac3a472008-01-27 22:31:27 +01001538 /* SBP-2 requires quadlet alignment of the data buffers. */
1539 blk_queue_update_dma_alignment(sdev->request_queue, 4 - 1);
James Bottomley465ff312008-01-01 10:00:10 -06001540
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001541 if (lu->tgt->workarounds & SBP2_WORKAROUND_INQUIRY_36)
Stefan Richtercfb01382007-01-23 21:20:08 +01001542 sdev->inquiry_len = 36;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001543
Stefan Richtercfb01382007-01-23 21:20:08 +01001544 return 0;
1545}
1546
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001547static int sbp2_scsi_slave_configure(struct scsi_device *sdev)
1548{
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001549 struct sbp2_logical_unit *lu = sdev->hostdata;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001550
Stefan Richtercfb01382007-01-23 21:20:08 +01001551 sdev->use_10_for_rw = 1;
1552
Stefan Richter2635f962008-05-11 00:36:47 +02001553 if (sbp2_param_exclusive_login)
1554 sdev->manage_start_stop = 1;
1555
Stefan Richtercfb01382007-01-23 21:20:08 +01001556 if (sdev->type == TYPE_ROM)
1557 sdev->use_10_for_ms = 1;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001558
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001559 if (sdev->type == TYPE_DISK &&
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001560 lu->tgt->workarounds & SBP2_WORKAROUND_MODE_SENSE_8)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001561 sdev->skip_ms_page_8 = 1;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001562
1563 if (lu->tgt->workarounds & SBP2_WORKAROUND_FIX_CAPACITY)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001564 sdev->fix_capacity = 1;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001565
Stefan Richterffcaade2008-05-11 00:35:04 +02001566 if (lu->tgt->workarounds & SBP2_WORKAROUND_POWER_CONDITION)
1567 sdev->start_stop_pwr_cond = 1;
1568
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001569 if (lu->tgt->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS)
Stefan Richtercf47c7a2007-06-17 23:52:08 +02001570 blk_queue_max_sectors(sdev->request_queue, 128 * 1024 / 512);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001571
Stefan Richter09b12dd2008-08-14 21:47:21 +02001572 blk_queue_max_segment_size(sdev->request_queue, SBP2_MAX_SEG_SIZE);
1573
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001574 return 0;
1575}
1576
1577/*
1578 * Called by scsi stack when something has really gone wrong. Usually
1579 * called when a command has timed-out for some reason.
1580 */
1581static int sbp2_scsi_abort(struct scsi_cmnd *cmd)
1582{
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001583 struct sbp2_logical_unit *lu = cmd->device->hostdata;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001584
Stefan Richter48f18c72008-02-03 23:09:50 +01001585 fw_notify("%s: sbp2_scsi_abort\n", lu->tgt->bus_id);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001586 sbp2_agent_reset(lu);
1587 sbp2_cancel_orbs(lu);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001588
1589 return SUCCESS;
1590}
1591
Stefan Richter14e21982007-05-27 13:18:27 +02001592/*
1593 * Format of /sys/bus/scsi/devices/.../ieee1394_id:
1594 * u64 EUI-64 : u24 directory_ID : u16 LUN (all printed in hexadecimal)
1595 *
1596 * This is the concatenation of target port identifier and logical unit
1597 * identifier as per SAM-2...SAM-4 annex A.
1598 */
Stefan Richter53dca512008-12-14 21:47:04 +01001599static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev,
1600 struct device_attribute *attr, char *buf)
Stefan Richter14e21982007-05-27 13:18:27 +02001601{
1602 struct scsi_device *sdev = to_scsi_device(dev);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001603 struct sbp2_logical_unit *lu;
Stefan Richter14e21982007-05-27 13:18:27 +02001604
1605 if (!sdev)
1606 return 0;
Stefan Richter14e21982007-05-27 13:18:27 +02001607
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001608 lu = sdev->hostdata;
Stefan Richter14e21982007-05-27 13:18:27 +02001609
Stefan Richterc9755e12008-03-24 20:54:28 +01001610 return sprintf(buf, "%016llx:%06x:%04x\n",
1611 (unsigned long long)lu->tgt->guid,
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001612 lu->tgt->directory_id, lu->lun);
Stefan Richter14e21982007-05-27 13:18:27 +02001613}
1614
1615static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL);
1616
1617static struct device_attribute *sbp2_scsi_sysfs_attrs[] = {
1618 &dev_attr_ieee1394_id,
1619 NULL
1620};
1621
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001622static struct scsi_host_template scsi_driver_template = {
1623 .module = THIS_MODULE,
1624 .name = "SBP-2 IEEE-1394",
Kristian Høgsbergb02b6bc2007-05-09 19:23:12 -04001625 .proc_name = sbp2_driver_name,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001626 .queuecommand = sbp2_scsi_queuecommand,
Stefan Richtercfb01382007-01-23 21:20:08 +01001627 .slave_alloc = sbp2_scsi_slave_alloc,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001628 .slave_configure = sbp2_scsi_slave_configure,
1629 .eh_abort_handler = sbp2_scsi_abort,
1630 .this_id = -1,
1631 .sg_tablesize = SG_ALL,
1632 .use_clustering = ENABLE_CLUSTERING,
Stefan Richter02af8e72007-01-21 20:50:11 +01001633 .cmd_per_lun = 1,
1634 .can_queue = 1,
Stefan Richter14e21982007-05-27 13:18:27 +02001635 .sdev_attrs = sbp2_scsi_sysfs_attrs,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001636};
1637
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001638MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>");
1639MODULE_DESCRIPTION("SCSI over IEEE1394");
1640MODULE_LICENSE("GPL");
1641MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table);
1642
Olaf Hering1e4c7b02007-05-05 23:17:13 +02001643/* Provide a module alias so root-on-sbp2 initrds don't break. */
1644#ifndef CONFIG_IEEE1394_SBP2_MODULE
1645MODULE_ALIAS("sbp2");
1646#endif
1647
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001648static int __init sbp2_init(void)
1649{
Stefan Richterdf8ec242007-08-12 12:51:18 +02001650 sbp2_wq = create_singlethread_workqueue(KBUILD_MODNAME);
1651 if (!sbp2_wq)
1652 return -ENOMEM;
1653
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001654 return driver_register(&sbp2_driver.driver);
1655}
1656
1657static void __exit sbp2_cleanup(void)
1658{
1659 driver_unregister(&sbp2_driver.driver);
Stefan Richterdf8ec242007-08-12 12:51:18 +02001660 destroy_workqueue(sbp2_wq);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001661}
1662
1663module_init(sbp2_init);
1664module_exit(sbp2_cleanup);