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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 */
Rusty Russell90ab5ee2012-01-13 09:32:20 +103069static bool sbp2_param_exclusive_login = 1;
Stefan Richter5cd54c92007-06-17 23:55:41 +020070module_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 -0500128static const char sbp2_driver_name[] = "sbp2";
129
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200130/*
131 * We create one struct sbp2_logical_unit per SBP-2 Logical Unit Number Entry
132 * and one struct scsi_device per sbp2_logical_unit.
133 */
134struct sbp2_logical_unit {
135 struct sbp2_target *tgt;
136 struct list_head link;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500137 struct fw_address_handler address_handler;
138 struct list_head orb_list;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200139
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500140 u64 command_block_agent_address;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200141 u16 lun;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500142 int login_id;
143
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400144 /*
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200145 * The generation is updated once we've logged in or reconnected
146 * to the logical unit. Thus, I/O to the device will automatically
147 * fail and get retried if it happens in a window where the device
148 * is not ready, e.g. after a bus reset but before we reconnect.
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400149 */
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500150 int generation;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500151 int retries;
152 struct delayed_work work;
Stefan Richterf8436152008-02-26 23:30:02 +0100153 bool has_sdev;
Stefan Richter2e2705b2008-02-16 16:37:28 +0100154 bool blocked;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500155};
156
Stefan Richterb2af07b2011-08-27 15:34:32 +0200157static void sbp2_queue_work(struct sbp2_logical_unit *lu, unsigned long delay)
158{
159 queue_delayed_work(fw_workqueue, &lu->work, delay);
160}
161
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200162/*
163 * We create one struct sbp2_target per IEEE 1212 Unit Directory
164 * and one struct Scsi_Host per sbp2_target.
165 */
166struct sbp2_target {
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200167 struct fw_unit *unit;
Stefan Richter48f18c72008-02-03 23:09:50 +0100168 const char *bus_id;
Stefan Richter05cca732008-01-26 17:42:45 +0100169 struct list_head lu_list;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200170
171 u64 management_agent_address;
Stefan Richterc9755e12008-03-24 20:54:28 +0100172 u64 guid;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200173 int directory_id;
174 int node_id;
175 int address_high;
Stefan Richter05cca732008-01-26 17:42:45 +0100176 unsigned int workarounds;
Jarod Wilson384170d2008-01-25 23:31:12 -0500177 unsigned int mgt_orb_timeout;
Stefan Richtera08e1002009-01-24 19:41:46 +0100178 unsigned int max_payload;
Stefan Richter2e2705b2008-02-16 16:37:28 +0100179
180 int dont_block; /* counter for each logical unit */
181 int blocked; /* ditto */
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200182};
183
Stefan Richtere5110d02009-06-06 18:35:27 +0200184static struct fw_device *target_device(struct sbp2_target *tgt)
185{
186 return fw_parent_device(tgt->unit);
187}
188
Jay Fenlasoncd1f70fd2008-10-24 15:26:20 -0400189/* Impossible login_id, to detect logout attempt before successful login */
190#define INVALID_LOGIN_ID 0x10000
191
Stefan Richtereaf76e02009-10-08 00:39:31 +0200192#define SBP2_ORB_TIMEOUT 2000U /* Timeout in ms */
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500193#define SBP2_ORB_NULL 0x80000000
Jarod Wilson17cff9f2008-03-07 01:43:31 -0500194#define SBP2_RETRY_LIMIT 0xf /* 15 retries */
195#define SBP2_CYCLE_LIMIT (0xc8 << 12) /* 200 125us cycles */
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500196
Stefan Richter09b12dd2008-08-14 21:47:21 +0200197/*
Stefan Richteraf271942009-06-30 20:27:59 +0200198 * There is no transport protocol limit to the CDB length, but we implement
199 * a fixed length only. 16 bytes is enough for disks larger than 2 TB.
200 */
201#define SBP2_MAX_CDB_SIZE 16
202
203/*
Stefan Richter09b12dd2008-08-14 21:47:21 +0200204 * The default maximum s/g segment size of a FireWire controller is
205 * usually 0x10000, but SBP-2 only allows 0xffff. Since buffers have to
206 * be quadlet-aligned, we set the length limit to 0xffff & ~3.
207 */
208#define SBP2_MAX_SEG_SIZE 0xfffc
209
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500210/* Unit directory keys */
Jarod Wilson384170d2008-01-25 23:31:12 -0500211#define SBP2_CSR_UNIT_CHARACTERISTICS 0x3a
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200212#define SBP2_CSR_FIRMWARE_REVISION 0x3c
213#define SBP2_CSR_LOGICAL_UNIT_NUMBER 0x14
214#define SBP2_CSR_LOGICAL_UNIT_DIRECTORY 0xd4
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500215
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500216/* Management orb opcodes */
217#define SBP2_LOGIN_REQUEST 0x0
218#define SBP2_QUERY_LOGINS_REQUEST 0x1
219#define SBP2_RECONNECT_REQUEST 0x3
220#define SBP2_SET_PASSWORD_REQUEST 0x4
221#define SBP2_LOGOUT_REQUEST 0x7
222#define SBP2_ABORT_TASK_REQUEST 0xb
223#define SBP2_ABORT_TASK_SET 0xc
224#define SBP2_LOGICAL_UNIT_RESET 0xe
225#define SBP2_TARGET_RESET_REQUEST 0xf
226
227/* Offsets for command block agent registers */
228#define SBP2_AGENT_STATE 0x00
229#define SBP2_AGENT_RESET 0x04
230#define SBP2_ORB_POINTER 0x08
231#define SBP2_DOORBELL 0x10
232#define SBP2_UNSOLICITED_STATUS_ENABLE 0x14
233
234/* Status write response codes */
235#define SBP2_STATUS_REQUEST_COMPLETE 0x0
236#define SBP2_STATUS_TRANSPORT_FAILURE 0x1
237#define SBP2_STATUS_ILLEGAL_REQUEST 0x2
238#define SBP2_STATUS_VENDOR_DEPENDENT 0x3
239
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400240#define STATUS_GET_ORB_HIGH(v) ((v).status & 0xffff)
241#define STATUS_GET_SBP_STATUS(v) (((v).status >> 16) & 0xff)
242#define STATUS_GET_LEN(v) (((v).status >> 24) & 0x07)
243#define STATUS_GET_DEAD(v) (((v).status >> 27) & 0x01)
244#define STATUS_GET_RESPONSE(v) (((v).status >> 28) & 0x03)
245#define STATUS_GET_SOURCE(v) (((v).status >> 30) & 0x03)
246#define STATUS_GET_ORB_LOW(v) ((v).orb_low)
247#define STATUS_GET_DATA(v) ((v).data)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500248
249struct sbp2_status {
250 u32 status;
251 u32 orb_low;
252 u8 data[24];
253};
254
255struct sbp2_pointer {
Stefan Richter71ee9f02008-02-28 20:51:11 +0100256 __be32 high;
257 __be32 low;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500258};
259
260struct sbp2_orb {
261 struct fw_transaction t;
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400262 struct kref kref;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500263 dma_addr_t request_bus;
264 int rcode;
Kristian Høgsberga98e2712007-05-07 20:33:34 -0400265 void (*callback)(struct sbp2_orb * orb, struct sbp2_status * status);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500266 struct list_head link;
267};
268
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400269#define MANAGEMENT_ORB_LUN(v) ((v))
270#define MANAGEMENT_ORB_FUNCTION(v) ((v) << 16)
271#define MANAGEMENT_ORB_RECONNECT(v) ((v) << 20)
Stefan Richter5cd54c92007-06-17 23:55:41 +0200272#define MANAGEMENT_ORB_EXCLUSIVE(v) ((v) ? 1 << 28 : 0)
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400273#define MANAGEMENT_ORB_REQUEST_FORMAT(v) ((v) << 29)
274#define MANAGEMENT_ORB_NOTIFY ((1) << 31)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500275
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400276#define MANAGEMENT_ORB_RESPONSE_LENGTH(v) ((v))
277#define MANAGEMENT_ORB_PASSWORD_LENGTH(v) ((v) << 16)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500278
279struct sbp2_management_orb {
280 struct sbp2_orb base;
281 struct {
282 struct sbp2_pointer password;
283 struct sbp2_pointer response;
Stefan Richter71ee9f02008-02-28 20:51:11 +0100284 __be32 misc;
285 __be32 length;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500286 struct sbp2_pointer status_fifo;
287 } request;
288 __be32 response[4];
289 dma_addr_t response_bus;
290 struct completion done;
291 struct sbp2_status status;
292};
293
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500294struct sbp2_login_response {
Stefan Richter71ee9f02008-02-28 20:51:11 +0100295 __be32 misc;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500296 struct sbp2_pointer command_block_agent;
Stefan Richter71ee9f02008-02-28 20:51:11 +0100297 __be32 reconnect_hold;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500298};
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400299#define COMMAND_ORB_DATA_SIZE(v) ((v))
300#define COMMAND_ORB_PAGE_SIZE(v) ((v) << 16)
301#define COMMAND_ORB_PAGE_TABLE_PRESENT ((1) << 19)
302#define COMMAND_ORB_MAX_PAYLOAD(v) ((v) << 20)
303#define COMMAND_ORB_SPEED(v) ((v) << 24)
Stefan Richter0d7dcbf2008-02-28 20:52:02 +0100304#define COMMAND_ORB_DIRECTION ((1) << 27)
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400305#define COMMAND_ORB_REQUEST_FORMAT(v) ((v) << 29)
306#define COMMAND_ORB_NOTIFY ((1) << 31)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500307
308struct sbp2_command_orb {
309 struct sbp2_orb base;
310 struct {
311 struct sbp2_pointer next;
312 struct sbp2_pointer data_descriptor;
Stefan Richter71ee9f02008-02-28 20:51:11 +0100313 __be32 misc;
Stefan Richteraf271942009-06-30 20:27:59 +0200314 u8 command_block[SBP2_MAX_CDB_SIZE];
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500315 } request;
316 struct scsi_cmnd *cmd;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200317 struct sbp2_logical_unit *lu;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500318
Stefan Richter9fb2dd12007-07-01 13:55:31 +0200319 struct sbp2_pointer page_table[SG_ALL] __attribute__((aligned(8)));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500320 dma_addr_t page_table_bus;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500321};
322
Stefan Richterf7460722009-01-24 19:41:46 +0100323#define SBP2_ROM_VALUE_WILDCARD ~0 /* match all */
324#define SBP2_ROM_VALUE_MISSING 0xff000000 /* not present in the unit dir. */
325
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500326/*
327 * List of devices with known bugs.
328 *
329 * The firmware_revision field, masked with 0xffff00, is the best
330 * indicator for the type of bridge chip of a device. It yields a few
331 * false positives but this did not break correctly behaving devices
Stefan Richterf7460722009-01-24 19:41:46 +0100332 * so far.
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500333 */
334static const struct {
335 u32 firmware_revision;
336 u32 model;
Stefan Richter05cca732008-01-26 17:42:45 +0100337 unsigned int workarounds;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500338} sbp2_workarounds_table[] = {
339 /* DViCO Momobay CX-1 with TSB42AA9 bridge */ {
340 .firmware_revision = 0x002800,
341 .model = 0x001010,
342 .workarounds = SBP2_WORKAROUND_INQUIRY_36 |
Stefan Richterffcaade2008-05-11 00:35:04 +0200343 SBP2_WORKAROUND_MODE_SENSE_8 |
344 SBP2_WORKAROUND_POWER_CONDITION,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500345 },
Stefan Richter9220f192008-02-03 23:04:38 +0100346 /* DViCO Momobay FX-3A with TSB42AA9A bridge */ {
347 .firmware_revision = 0x002800,
348 .model = 0x000000,
Stefan Richter3c5f8032009-09-06 19:33:50 +0200349 .workarounds = SBP2_WORKAROUND_POWER_CONDITION,
Stefan Richter9220f192008-02-03 23:04:38 +0100350 },
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500351 /* Initio bridges, actually only needed for some older ones */ {
352 .firmware_revision = 0x000200,
Stefan Richterf7460722009-01-24 19:41:46 +0100353 .model = SBP2_ROM_VALUE_WILDCARD,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500354 .workarounds = SBP2_WORKAROUND_INQUIRY_36,
355 },
Stefan Richterffcaade2008-05-11 00:35:04 +0200356 /* PL-3507 bridge with Prolific firmware */ {
357 .firmware_revision = 0x012800,
Stefan Richterf7460722009-01-24 19:41:46 +0100358 .model = SBP2_ROM_VALUE_WILDCARD,
Stefan Richterffcaade2008-05-11 00:35:04 +0200359 .workarounds = SBP2_WORKAROUND_POWER_CONDITION,
360 },
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500361 /* Symbios bridge */ {
362 .firmware_revision = 0xa0b800,
Stefan Richterf7460722009-01-24 19:41:46 +0100363 .model = SBP2_ROM_VALUE_WILDCARD,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500364 .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS,
365 },
Stefan Richter2aa9ff72008-03-11 22:32:03 +0100366 /* Datafab MD2-FW2 with Symbios/LSILogic SYM13FW500 bridge */ {
367 .firmware_revision = 0x002600,
Stefan Richterf7460722009-01-24 19:41:46 +0100368 .model = SBP2_ROM_VALUE_WILDCARD,
Stefan Richter2aa9ff72008-03-11 22:32:03 +0100369 .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS,
370 },
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400371 /*
Stefan Richterc8c47072009-01-29 00:11:59 +0100372 * iPod 2nd generation: needs 128k max transfer size workaround
373 * iPod 3rd generation: needs fix capacity workaround
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400374 */
Stefan Richterc8c47072009-01-29 00:11:59 +0100375 {
376 .firmware_revision = 0x0a2700,
377 .model = 0x000000,
378 .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS |
379 SBP2_WORKAROUND_FIX_CAPACITY,
380 },
381 /* iPod 4th generation */ {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500382 .firmware_revision = 0x0a2700,
383 .model = 0x000021,
384 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
385 },
386 /* iPod mini */ {
387 .firmware_revision = 0x0a2700,
Stefan Richter031bb272008-11-22 12:38:58 +0100388 .model = 0x000022,
389 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
390 },
391 /* iPod mini */ {
392 .firmware_revision = 0x0a2700,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500393 .model = 0x000023,
394 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
395 },
396 /* iPod Photo */ {
397 .firmware_revision = 0x0a2700,
398 .model = 0x00007e,
399 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
400 }
401};
402
Stefan Richter53dca512008-12-14 21:47:04 +0100403static void free_orb(struct kref *kref)
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400404{
405 struct sbp2_orb *orb = container_of(kref, struct sbp2_orb, kref);
406
407 kfree(orb);
408}
409
Stefan Richter53dca512008-12-14 21:47:04 +0100410static void sbp2_status_write(struct fw_card *card, struct fw_request *request,
411 int tcode, int destination, int source,
Stefan Richter33e553f2010-06-20 22:50:35 +0200412 int generation, unsigned long long offset,
Stefan Richter53dca512008-12-14 21:47:04 +0100413 void *payload, size_t length, void *callback_data)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500414{
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200415 struct sbp2_logical_unit *lu = callback_data;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500416 struct sbp2_orb *orb;
417 struct sbp2_status status;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500418 unsigned long flags;
419
420 if (tcode != TCODE_WRITE_BLOCK_REQUEST ||
Stefan Richter094614f2009-09-06 18:51:27 +0200421 length < 8 || length > sizeof(status)) {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500422 fw_send_response(card, request, RCODE_TYPE_ERROR);
423 return;
424 }
425
Stefan Richter094614f2009-09-06 18:51:27 +0200426 status.status = be32_to_cpup(payload);
427 status.orb_low = be32_to_cpup(payload + 4);
428 memset(status.data, 0, sizeof(status.data));
429 if (length > 8)
430 memcpy(status.data, payload + 8, length - 8);
431
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400432 if (STATUS_GET_SOURCE(status) == 2 || STATUS_GET_SOURCE(status) == 3) {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500433 fw_notify("non-orb related status write, not handled\n");
434 fw_send_response(card, request, RCODE_COMPLETE);
435 return;
436 }
437
438 /* Lookup the orb corresponding to this status write. */
439 spin_lock_irqsave(&card->lock, flags);
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200440 list_for_each_entry(orb, &lu->orb_list, link) {
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400441 if (STATUS_GET_ORB_HIGH(status) == 0 &&
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400442 STATUS_GET_ORB_LOW(status) == orb->request_bus) {
443 orb->rcode = RCODE_COMPLETE;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500444 list_del(&orb->link);
445 break;
446 }
447 }
448 spin_unlock_irqrestore(&card->lock, flags);
449
Stefan Richterbaed6b82009-09-03 23:07:35 +0200450 if (&orb->link != &lu->orb_list) {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500451 orb->callback(orb, &status);
Stefan Richter6c743402010-08-16 21:58:03 +0200452 kref_put(&orb->kref, free_orb); /* orb callback reference */
Stefan Richterbaed6b82009-09-03 23:07:35 +0200453 } else {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500454 fw_error("status write for unknown orb\n");
Stefan Richterbaed6b82009-09-03 23:07:35 +0200455 }
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400456
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500457 fw_send_response(card, request, RCODE_COMPLETE);
458}
459
Stefan Richter53dca512008-12-14 21:47:04 +0100460static void complete_transaction(struct fw_card *card, int rcode,
461 void *payload, size_t length, void *data)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500462{
463 struct sbp2_orb *orb = data;
464 unsigned long flags;
465
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400466 /*
467 * This is a little tricky. We can get the status write for
468 * the orb before we get this callback. The status write
469 * handler above will assume the orb pointer transaction was
470 * successful and set the rcode to RCODE_COMPLETE for the orb.
471 * So this callback only sets the rcode if it hasn't already
472 * been set and only does the cleanup if the transaction
473 * failed and we didn't already get a status write.
474 */
475 spin_lock_irqsave(&card->lock, flags);
476
477 if (orb->rcode == -1)
478 orb->rcode = rcode;
Stefan Richter7a4e1e92011-03-15 00:04:42 +0100479 if (orb->rcode != RCODE_COMPLETE) {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500480 list_del(&orb->link);
Stefan Richter1b34e972007-08-25 10:40:42 +0200481 spin_unlock_irqrestore(&card->lock, flags);
Stefan Richter6c743402010-08-16 21:58:03 +0200482
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500483 orb->callback(orb, NULL);
Stefan Richter6c743402010-08-16 21:58:03 +0200484 kref_put(&orb->kref, free_orb); /* orb callback reference */
Stefan Richter1b34e972007-08-25 10:40:42 +0200485 } else {
486 spin_unlock_irqrestore(&card->lock, flags);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500487 }
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400488
Stefan Richter6c743402010-08-16 21:58:03 +0200489 kref_put(&orb->kref, free_orb); /* transaction callback reference */
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500490}
491
Stefan Richter53dca512008-12-14 21:47:04 +0100492static void sbp2_send_orb(struct sbp2_orb *orb, struct sbp2_logical_unit *lu,
493 int node_id, int generation, u64 offset)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500494{
Stefan Richtere5110d02009-06-06 18:35:27 +0200495 struct fw_device *device = target_device(lu->tgt);
Stefan Richter81bf52d2011-05-01 21:06:42 +0200496 struct sbp2_pointer orb_pointer;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500497 unsigned long flags;
498
Stefan Richter81bf52d2011-05-01 21:06:42 +0200499 orb_pointer.high = 0;
500 orb_pointer.low = cpu_to_be32(orb->request_bus);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500501
502 spin_lock_irqsave(&device->card->lock, flags);
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200503 list_add_tail(&orb->link, &lu->orb_list);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500504 spin_unlock_irqrestore(&device->card->lock, flags);
505
Stefan Richter6c743402010-08-16 21:58:03 +0200506 kref_get(&orb->kref); /* transaction callback reference */
507 kref_get(&orb->kref); /* orb callback reference */
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400508
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500509 fw_send_request(device->card, &orb->t, TCODE_WRITE_BLOCK_REQUEST,
Stefan Richterf1397492007-06-10 21:31:36 +0200510 node_id, generation, device->max_speed, offset,
Stefan Richter81bf52d2011-05-01 21:06:42 +0200511 &orb_pointer, 8, complete_transaction, orb);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500512}
513
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200514static int sbp2_cancel_orbs(struct sbp2_logical_unit *lu)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500515{
Stefan Richtere5110d02009-06-06 18:35:27 +0200516 struct fw_device *device = target_device(lu->tgt);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500517 struct sbp2_orb *orb, *next;
518 struct list_head list;
519 unsigned long flags;
Kristian Høgsberg2aaad972007-03-07 12:12:47 -0500520 int retval = -ENOENT;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500521
522 INIT_LIST_HEAD(&list);
523 spin_lock_irqsave(&device->card->lock, flags);
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200524 list_splice_init(&lu->orb_list, &list);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500525 spin_unlock_irqrestore(&device->card->lock, flags);
526
527 list_for_each_entry_safe(orb, next, &list, link) {
Kristian Høgsberg2aaad972007-03-07 12:12:47 -0500528 retval = 0;
Stefan Richter7a4e1e92011-03-15 00:04:42 +0100529 if (fw_cancel_transaction(device->card, &orb->t) == 0)
530 continue;
Kristian Høgsberg730c32f2007-02-06 14:49:32 -0500531
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500532 orb->rcode = RCODE_CANCELLED;
533 orb->callback(orb, NULL);
Stefan Richter6c743402010-08-16 21:58:03 +0200534 kref_put(&orb->kref, free_orb); /* orb callback reference */
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500535 }
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500536
Kristian Høgsberg2aaad972007-03-07 12:12:47 -0500537 return retval;
Kristian Høgsberg1d3d52c2007-02-06 14:49:33 -0500538}
539
Stefan Richter53dca512008-12-14 21:47:04 +0100540static void complete_management_orb(struct sbp2_orb *base_orb,
541 struct sbp2_status *status)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500542{
543 struct sbp2_management_orb *orb =
Jay Fenlason6f061482007-06-27 16:04:33 -0400544 container_of(base_orb, struct sbp2_management_orb, base);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500545
546 if (status)
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400547 memcpy(&orb->status, status, sizeof(*status));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500548 complete(&orb->done);
549}
550
Stefan Richter53dca512008-12-14 21:47:04 +0100551static int sbp2_send_management_orb(struct sbp2_logical_unit *lu, int node_id,
552 int generation, int function,
553 int lun_or_login_id, void *response)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500554{
Stefan Richtere5110d02009-06-06 18:35:27 +0200555 struct fw_device *device = target_device(lu->tgt);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500556 struct sbp2_management_orb *orb;
Jarod Wilsona4c379c2008-01-19 13:15:05 +0100557 unsigned int timeout;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500558 int retval = -ENOMEM;
559
Stefan Richterbe6f48b2008-01-27 19:14:44 +0100560 if (function == SBP2_LOGOUT_REQUEST && fw_device_is_shutdown(device))
561 return 0;
562
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400563 orb = kzalloc(sizeof(*orb), GFP_ATOMIC);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500564 if (orb == NULL)
565 return -ENOMEM;
566
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400567 kref_init(&orb->base.kref);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500568 orb->response_bus =
569 dma_map_single(device->card->device, &orb->response,
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400570 sizeof(orb->response), DMA_FROM_DEVICE);
FUJITA Tomonori8d8bb392008-07-25 19:44:49 -0700571 if (dma_mapping_error(device->card->device, orb->response_bus))
Stefan Richter7aa48482007-07-02 21:04:44 +0200572 goto fail_mapping_response;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500573
Stefan Richter71ee9f02008-02-28 20:51:11 +0100574 orb->request.response.high = 0;
575 orb->request.response.low = cpu_to_be32(orb->response_bus);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500576
Stefan Richter71ee9f02008-02-28 20:51:11 +0100577 orb->request.misc = cpu_to_be32(
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400578 MANAGEMENT_ORB_NOTIFY |
579 MANAGEMENT_ORB_FUNCTION(function) |
Stefan Richter71ee9f02008-02-28 20:51:11 +0100580 MANAGEMENT_ORB_LUN(lun_or_login_id));
581 orb->request.length = cpu_to_be32(
582 MANAGEMENT_ORB_RESPONSE_LENGTH(sizeof(orb->response)));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500583
Stefan Richter71ee9f02008-02-28 20:51:11 +0100584 orb->request.status_fifo.high =
585 cpu_to_be32(lu->address_handler.offset >> 32);
586 orb->request.status_fifo.low =
587 cpu_to_be32(lu->address_handler.offset);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500588
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500589 if (function == SBP2_LOGIN_REQUEST) {
Stefan Richter14dc9922008-01-20 01:25:31 +0100590 /* Ask for 2^2 == 4 seconds reconnect grace period */
Stefan Richter71ee9f02008-02-28 20:51:11 +0100591 orb->request.misc |= cpu_to_be32(
Stefan Richter14dc9922008-01-20 01:25:31 +0100592 MANAGEMENT_ORB_RECONNECT(2) |
Stefan Richter71ee9f02008-02-28 20:51:11 +0100593 MANAGEMENT_ORB_EXCLUSIVE(sbp2_param_exclusive_login));
Jarod Wilson384170d2008-01-25 23:31:12 -0500594 timeout = lu->tgt->mgt_orb_timeout;
Jarod Wilsona4c379c2008-01-19 13:15:05 +0100595 } else {
596 timeout = SBP2_ORB_TIMEOUT;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500597 }
598
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500599 init_completion(&orb->done);
600 orb->base.callback = complete_management_orb;
Kristian Høgsberg2aaad972007-03-07 12:12:47 -0500601
Stefan Richter7aa48482007-07-02 21:04:44 +0200602 orb->base.request_bus =
603 dma_map_single(device->card->device, &orb->request,
604 sizeof(orb->request), DMA_TO_DEVICE);
FUJITA Tomonori8d8bb392008-07-25 19:44:49 -0700605 if (dma_mapping_error(device->card->device, orb->base.request_bus))
Stefan Richter7aa48482007-07-02 21:04:44 +0200606 goto fail_mapping_request;
607
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200608 sbp2_send_orb(&orb->base, lu, node_id, generation,
609 lu->tgt->management_agent_address);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500610
Jarod Wilsona4c379c2008-01-19 13:15:05 +0100611 wait_for_completion_timeout(&orb->done, msecs_to_jiffies(timeout));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500612
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500613 retval = -EIO;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200614 if (sbp2_cancel_orbs(lu) == 0) {
Stefan Richter48f18c72008-02-03 23:09:50 +0100615 fw_error("%s: orb reply timed out, rcode=0x%02x\n",
616 lu->tgt->bus_id, orb->base.rcode);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500617 goto out;
618 }
619
Kristian Høgsberg2aaad972007-03-07 12:12:47 -0500620 if (orb->base.rcode != RCODE_COMPLETE) {
Stefan Richter48f18c72008-02-03 23:09:50 +0100621 fw_error("%s: management write failed, rcode 0x%02x\n",
622 lu->tgt->bus_id, orb->base.rcode);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500623 goto out;
624 }
625
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400626 if (STATUS_GET_RESPONSE(orb->status) != 0 ||
627 STATUS_GET_SBP_STATUS(orb->status) != 0) {
Stefan Richter48f18c72008-02-03 23:09:50 +0100628 fw_error("%s: error status: %d:%d\n", lu->tgt->bus_id,
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400629 STATUS_GET_RESPONSE(orb->status),
630 STATUS_GET_SBP_STATUS(orb->status));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500631 goto out;
632 }
633
634 retval = 0;
635 out:
636 dma_unmap_single(device->card->device, orb->base.request_bus,
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400637 sizeof(orb->request), DMA_TO_DEVICE);
Stefan Richter7aa48482007-07-02 21:04:44 +0200638 fail_mapping_request:
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500639 dma_unmap_single(device->card->device, orb->response_bus,
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400640 sizeof(orb->response), DMA_FROM_DEVICE);
Stefan Richter7aa48482007-07-02 21:04:44 +0200641 fail_mapping_response:
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500642 if (response)
Stefan Richter71ee9f02008-02-28 20:51:11 +0100643 memcpy(response, orb->response, sizeof(orb->response));
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400644 kref_put(&orb->base.kref, free_orb);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500645
646 return retval;
647}
648
Stefan Richtere0e60212008-02-03 23:08:58 +0100649static void sbp2_agent_reset(struct sbp2_logical_unit *lu)
650{
Stefan Richtere5110d02009-06-06 18:35:27 +0200651 struct fw_device *device = target_device(lu->tgt);
Jay Fenlason1e119fa2008-07-20 14:20:53 +0200652 __be32 d = 0;
Stefan Richtere0e60212008-02-03 23:08:58 +0100653
Jay Fenlason1e119fa2008-07-20 14:20:53 +0200654 fw_run_transaction(device->card, TCODE_WRITE_QUADLET_REQUEST,
655 lu->tgt->node_id, lu->generation, device->max_speed,
656 lu->command_block_agent_address + SBP2_AGENT_RESET,
Stefan Richtere847cc82010-06-12 20:29:07 +0200657 &d, 4);
Stefan Richtere0e60212008-02-03 23:08:58 +0100658}
659
Stefan Richter53dca512008-12-14 21:47:04 +0100660static void complete_agent_reset_write_no_wait(struct fw_card *card,
661 int rcode, void *payload, size_t length, void *data)
Stefan Richtere0e60212008-02-03 23:08:58 +0100662{
663 kfree(data);
664}
665
666static void sbp2_agent_reset_no_wait(struct sbp2_logical_unit *lu)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500667{
Stefan Richtere5110d02009-06-06 18:35:27 +0200668 struct fw_device *device = target_device(lu->tgt);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500669 struct fw_transaction *t;
Jay Fenlason1e119fa2008-07-20 14:20:53 +0200670 static __be32 d;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500671
Stefan Richtere0e60212008-02-03 23:08:58 +0100672 t = kmalloc(sizeof(*t), GFP_ATOMIC);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500673 if (t == NULL)
Stefan Richtere0e60212008-02-03 23:08:58 +0100674 return;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500675
676 fw_send_request(device->card, t, TCODE_WRITE_QUADLET_REQUEST,
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200677 lu->tgt->node_id, lu->generation, device->max_speed,
678 lu->command_block_agent_address + SBP2_AGENT_RESET,
Stefan Richtere847cc82010-06-12 20:29:07 +0200679 &d, 4, complete_agent_reset_write_no_wait, t);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500680}
681
Stefan Richter2e2705b2008-02-16 16:37:28 +0100682static inline void sbp2_allow_block(struct sbp2_logical_unit *lu)
683{
684 /*
685 * We may access dont_block without taking card->lock here:
686 * All callers of sbp2_allow_block() and all callers of sbp2_unblock()
687 * are currently serialized against each other.
688 * And a wrong result in sbp2_conditionally_block()'s access of
689 * dont_block is rather harmless, it simply misses its first chance.
690 */
691 --lu->tgt->dont_block;
692}
693
694/*
695 * Blocks lu->tgt if all of the following conditions are met:
696 * - Login, INQUIRY, and high-level SCSI setup of all of the target's
697 * logical units have been finished (indicated by dont_block == 0).
698 * - lu->generation is stale.
699 *
700 * Note, scsi_block_requests() must be called while holding card->lock,
701 * otherwise it might foil sbp2_[conditionally_]unblock()'s attempt to
702 * unblock the target.
703 */
704static void sbp2_conditionally_block(struct sbp2_logical_unit *lu)
705{
706 struct sbp2_target *tgt = lu->tgt;
Stefan Richtere5110d02009-06-06 18:35:27 +0200707 struct fw_card *card = target_device(tgt)->card;
Stefan Richter2e2705b2008-02-16 16:37:28 +0100708 struct Scsi_Host *shost =
709 container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
710 unsigned long flags;
711
712 spin_lock_irqsave(&card->lock, flags);
713 if (!tgt->dont_block && !lu->blocked &&
714 lu->generation != card->generation) {
715 lu->blocked = true;
Stefan Richtera5fd9ec2008-02-28 20:53:45 +0100716 if (++tgt->blocked == 1)
Stefan Richter2e2705b2008-02-16 16:37:28 +0100717 scsi_block_requests(shost);
Stefan Richter2e2705b2008-02-16 16:37:28 +0100718 }
719 spin_unlock_irqrestore(&card->lock, flags);
720}
721
722/*
723 * Unblocks lu->tgt as soon as all its logical units can be unblocked.
724 * Note, it is harmless to run scsi_unblock_requests() outside the
725 * card->lock protected section. On the other hand, running it inside
726 * the section might clash with shost->host_lock.
727 */
728static void sbp2_conditionally_unblock(struct sbp2_logical_unit *lu)
729{
730 struct sbp2_target *tgt = lu->tgt;
Stefan Richtere5110d02009-06-06 18:35:27 +0200731 struct fw_card *card = target_device(tgt)->card;
Stefan Richter2e2705b2008-02-16 16:37:28 +0100732 struct Scsi_Host *shost =
733 container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
734 unsigned long flags;
735 bool unblock = false;
736
737 spin_lock_irqsave(&card->lock, flags);
738 if (lu->blocked && lu->generation == card->generation) {
739 lu->blocked = false;
740 unblock = --tgt->blocked == 0;
741 }
742 spin_unlock_irqrestore(&card->lock, flags);
743
Stefan Richtera5fd9ec2008-02-28 20:53:45 +0100744 if (unblock)
Stefan Richter2e2705b2008-02-16 16:37:28 +0100745 scsi_unblock_requests(shost);
Stefan Richter2e2705b2008-02-16 16:37:28 +0100746}
747
748/*
749 * Prevents future blocking of tgt and unblocks it.
750 * Note, it is harmless to run scsi_unblock_requests() outside the
751 * card->lock protected section. On the other hand, running it inside
752 * the section might clash with shost->host_lock.
753 */
754static void sbp2_unblock(struct sbp2_target *tgt)
755{
Stefan Richtere5110d02009-06-06 18:35:27 +0200756 struct fw_card *card = target_device(tgt)->card;
Stefan Richter2e2705b2008-02-16 16:37:28 +0100757 struct Scsi_Host *shost =
758 container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
759 unsigned long flags;
760
761 spin_lock_irqsave(&card->lock, flags);
762 ++tgt->dont_block;
763 spin_unlock_irqrestore(&card->lock, flags);
764
765 scsi_unblock_requests(shost);
766}
767
Stefan Richterf8436152008-02-26 23:30:02 +0100768static int sbp2_lun2int(u16 lun)
769{
770 struct scsi_lun eight_bytes_lun;
771
772 memset(&eight_bytes_lun, 0, sizeof(eight_bytes_lun));
773 eight_bytes_lun.scsi_lun[0] = (lun >> 8) & 0xff;
774 eight_bytes_lun.scsi_lun[1] = lun & 0xff;
775
776 return scsilun_to_int(&eight_bytes_lun);
777}
778
Jarod Wilson17cff9f2008-03-07 01:43:31 -0500779/*
780 * Write retransmit retry values into the BUSY_TIMEOUT register.
781 * - The single-phase retry protocol is supported by all SBP-2 devices, but the
782 * default retry_limit value is 0 (i.e. never retry transmission). We write a
783 * saner value after logging into the device.
784 * - The dual-phase retry protocol is optional to implement, and if not
785 * supported, writes to the dual-phase portion of the register will be
786 * ignored. We try to write the original 1394-1995 default here.
787 * - In the case of devices that are also SBP-3-compliant, all writes are
788 * ignored, as the register is read-only, but contains single-phase retry of
789 * 15, which is what we're trying to set for all SBP-2 device anyway, so this
790 * write attempt is safe and yields more consistent behavior for all devices.
791 *
792 * See section 8.3.2.3.5 of the 1394-1995 spec, section 6.2 of the SBP-2 spec,
793 * and section 6.4 of the SBP-3 spec for further details.
794 */
Jarod Wilson51f9dbe2008-03-07 01:43:01 -0500795static void sbp2_set_busy_timeout(struct sbp2_logical_unit *lu)
796{
Stefan Richtere5110d02009-06-06 18:35:27 +0200797 struct fw_device *device = target_device(lu->tgt);
Jay Fenlason1e119fa2008-07-20 14:20:53 +0200798 __be32 d = cpu_to_be32(SBP2_CYCLE_LIMIT | SBP2_RETRY_LIMIT);
Jarod Wilson51f9dbe2008-03-07 01:43:01 -0500799
Jay Fenlason1e119fa2008-07-20 14:20:53 +0200800 fw_run_transaction(device->card, TCODE_WRITE_QUADLET_REQUEST,
801 lu->tgt->node_id, lu->generation, device->max_speed,
Stefan Richtere847cc82010-06-12 20:29:07 +0200802 CSR_REGISTER_BASE + CSR_BUSY_TIMEOUT, &d, 4);
Jarod Wilson51f9dbe2008-03-07 01:43:01 -0500803}
804
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200805static void sbp2_reconnect(struct work_struct *work);
806
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500807static void sbp2_login(struct work_struct *work)
808{
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200809 struct sbp2_logical_unit *lu =
810 container_of(work, struct sbp2_logical_unit, work.work);
Stefan Richter48f18c72008-02-03 23:09:50 +0100811 struct sbp2_target *tgt = lu->tgt;
Stefan Richtere5110d02009-06-06 18:35:27 +0200812 struct fw_device *device = target_device(tgt);
Stefan Richter48f18c72008-02-03 23:09:50 +0100813 struct Scsi_Host *shost;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200814 struct scsi_device *sdev;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500815 struct sbp2_login_response response;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200816 int generation, node_id, local_node_id;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500817
Stefan Richterbe6f48b2008-01-27 19:14:44 +0100818 if (fw_device_is_shutdown(device))
Stefan Richter6ff81472011-08-27 15:33:34 +0200819 return;
Stefan Richterbe6f48b2008-01-27 19:14:44 +0100820
Stefan Richter5a8a1bc2008-01-24 01:53:19 +0100821 generation = device->generation;
Stefan Richter621f6dd2008-10-26 11:04:20 +0100822 smp_rmb(); /* node IDs must not be older than generation */
Stefan Richter5a8a1bc2008-01-24 01:53:19 +0100823 node_id = device->node_id;
824 local_node_id = device->card->node_id;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500825
Stefan Richterce896d92008-02-03 23:11:39 +0100826 /* If this is a re-login attempt, log out, or we might be rejected. */
Stefan Richterf8436152008-02-26 23:30:02 +0100827 if (lu->has_sdev)
Stefan Richterce896d92008-02-03 23:11:39 +0100828 sbp2_send_management_orb(lu, device->node_id, generation,
829 SBP2_LOGOUT_REQUEST, lu->login_id, NULL);
830
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200831 if (sbp2_send_management_orb(lu, node_id, generation,
832 SBP2_LOGIN_REQUEST, lu->lun, &response) < 0) {
Stefan Richter2e2705b2008-02-16 16:37:28 +0100833 if (lu->retries++ < 5) {
Stefan Richter285838e2007-11-07 01:12:51 +0100834 sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5));
Stefan Richter2e2705b2008-02-16 16:37:28 +0100835 } else {
Stefan Richter48f18c72008-02-03 23:09:50 +0100836 fw_error("%s: failed to login to LUN %04x\n",
837 tgt->bus_id, lu->lun);
Stefan Richter2e2705b2008-02-16 16:37:28 +0100838 /* Let any waiting I/O fail from now on. */
839 sbp2_unblock(lu->tgt);
840 }
Stefan Richter6ff81472011-08-27 15:33:34 +0200841 return;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500842 }
843
Stefan Richter48f18c72008-02-03 23:09:50 +0100844 tgt->node_id = node_id;
845 tgt->address_high = local_node_id << 16;
Stefan Richter621f6dd2008-10-26 11:04:20 +0100846 smp_wmb(); /* node IDs must not be older than generation */
847 lu->generation = generation;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500848
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200849 lu->command_block_agent_address =
Stefan Richter71ee9f02008-02-28 20:51:11 +0100850 ((u64)(be32_to_cpu(response.command_block_agent.high) & 0xffff)
851 << 32) | be32_to_cpu(response.command_block_agent.low);
852 lu->login_id = be32_to_cpu(response.misc) & 0xffff;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500853
Stefan Richter48f18c72008-02-03 23:09:50 +0100854 fw_notify("%s: logged in to LUN %04x (%d retries)\n",
855 tgt->bus_id, lu->lun, lu->retries);
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500856
Jarod Wilson51f9dbe2008-03-07 01:43:01 -0500857 /* set appropriate retry limit(s) in BUSY_TIMEOUT register */
858 sbp2_set_busy_timeout(lu);
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500859
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200860 PREPARE_DELAYED_WORK(&lu->work, sbp2_reconnect);
861 sbp2_agent_reset(lu);
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500862
Stefan Richter0fa6dfd2008-02-03 23:10:47 +0100863 /* This was a re-login. */
Stefan Richterf8436152008-02-26 23:30:02 +0100864 if (lu->has_sdev) {
Stefan Richter0fa6dfd2008-02-03 23:10:47 +0100865 sbp2_cancel_orbs(lu);
Stefan Richter2e2705b2008-02-16 16:37:28 +0100866 sbp2_conditionally_unblock(lu);
Stefan Richter6ff81472011-08-27 15:33:34 +0200867
868 return;
Stefan Richter0fa6dfd2008-02-03 23:10:47 +0100869 }
870
Stefan Richter9220f192008-02-03 23:04:38 +0100871 if (lu->tgt->workarounds & SBP2_WORKAROUND_DELAY_INQUIRY)
872 ssleep(SBP2_INQUIRY_DELAY);
873
Stefan Richter48f18c72008-02-03 23:09:50 +0100874 shost = container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
Stefan Richterf8436152008-02-26 23:30:02 +0100875 sdev = __scsi_add_device(shost, 0, 0, sbp2_lun2int(lu->lun), lu);
Stefan Richtere80de372008-02-15 21:29:02 +0100876 /*
877 * FIXME: We are unable to perform reconnects while in sbp2_login().
878 * Therefore __scsi_add_device() will get into trouble if a bus reset
879 * happens in parallel. It will either fail or leave us with an
880 * unusable sdev. As a workaround we check for this and retry the
881 * whole login and SCSI probing.
882 */
Stefan Richter1b9c12b2008-01-26 17:43:23 +0100883
Stefan Richtere80de372008-02-15 21:29:02 +0100884 /* Reported error during __scsi_add_device() */
885 if (IS_ERR(sdev))
886 goto out_logout_login;
887
Stefan Richtere80de372008-02-15 21:29:02 +0100888 /* Unreported error during __scsi_add_device() */
889 smp_rmb(); /* get current card generation */
890 if (generation != device->card->generation) {
891 scsi_remove_device(sdev);
Stefan Richter33f1c6c2008-02-19 09:05:49 +0100892 scsi_device_put(sdev);
Stefan Richtere80de372008-02-15 21:29:02 +0100893 goto out_logout_login;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500894 }
Stefan Richtere80de372008-02-15 21:29:02 +0100895
896 /* No error during __scsi_add_device() */
Stefan Richterf8436152008-02-26 23:30:02 +0100897 lu->has_sdev = true;
898 scsi_device_put(sdev);
Stefan Richter2e2705b2008-02-16 16:37:28 +0100899 sbp2_allow_block(lu);
Stefan Richter6ff81472011-08-27 15:33:34 +0200900
901 return;
Stefan Richtere80de372008-02-15 21:29:02 +0100902
903 out_logout_login:
904 smp_rmb(); /* generation may have changed */
905 generation = device->generation;
906 smp_rmb(); /* node_id must not be older than generation */
907
908 sbp2_send_management_orb(lu, device->node_id, generation,
909 SBP2_LOGOUT_REQUEST, lu->login_id, NULL);
910 /*
911 * If a bus reset happened, sbp2_update will have requeued
912 * lu->work already. Reset the work from reconnect to login.
913 */
914 PREPARE_DELAYED_WORK(&lu->work, sbp2_login);
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500915}
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500916
Stefan Richterb2af07b2011-08-27 15:34:32 +0200917static void sbp2_reconnect(struct work_struct *work)
918{
919 struct sbp2_logical_unit *lu =
920 container_of(work, struct sbp2_logical_unit, work.work);
921 struct sbp2_target *tgt = lu->tgt;
922 struct fw_device *device = target_device(tgt);
923 int generation, node_id, local_node_id;
924
925 if (fw_device_is_shutdown(device))
926 return;
927
928 generation = device->generation;
929 smp_rmb(); /* node IDs must not be older than generation */
930 node_id = device->node_id;
931 local_node_id = device->card->node_id;
932
933 if (sbp2_send_management_orb(lu, node_id, generation,
934 SBP2_RECONNECT_REQUEST,
935 lu->login_id, NULL) < 0) {
936 /*
937 * If reconnect was impossible even though we are in the
938 * current generation, fall back and try to log in again.
939 *
940 * We could check for "Function rejected" status, but
941 * looking at the bus generation as simpler and more general.
942 */
943 smp_rmb(); /* get current card generation */
944 if (generation == device->card->generation ||
945 lu->retries++ >= 5) {
946 fw_error("%s: failed to reconnect\n", tgt->bus_id);
947 lu->retries = 0;
948 PREPARE_DELAYED_WORK(&lu->work, sbp2_login);
949 }
950 sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5));
951
952 return;
953 }
954
955 tgt->node_id = node_id;
956 tgt->address_high = local_node_id << 16;
957 smp_wmb(); /* node IDs must not be older than generation */
958 lu->generation = generation;
959
960 fw_notify("%s: reconnected to LUN %04x (%d retries)\n",
961 tgt->bus_id, lu->lun, lu->retries);
962
963 sbp2_agent_reset(lu);
964 sbp2_cancel_orbs(lu);
965 sbp2_conditionally_unblock(lu);
966}
967
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200968static int sbp2_add_logical_unit(struct sbp2_target *tgt, int lun_entry)
969{
970 struct sbp2_logical_unit *lu;
971
972 lu = kmalloc(sizeof(*lu), GFP_KERNEL);
973 if (!lu)
974 return -ENOMEM;
975
976 lu->address_handler.length = 0x100;
977 lu->address_handler.address_callback = sbp2_status_write;
978 lu->address_handler.callback_data = lu;
979
980 if (fw_core_add_address_handler(&lu->address_handler,
981 &fw_high_memory_region) < 0) {
982 kfree(lu);
983 return -ENOMEM;
984 }
985
Stefan Richterf8436152008-02-26 23:30:02 +0100986 lu->tgt = tgt;
987 lu->lun = lun_entry & 0xffff;
Jay Fenlasoncd1f70fd2008-10-24 15:26:20 -0400988 lu->login_id = INVALID_LOGIN_ID;
Stefan Richterf8436152008-02-26 23:30:02 +0100989 lu->retries = 0;
990 lu->has_sdev = false;
991 lu->blocked = false;
Stefan Richter2e2705b2008-02-16 16:37:28 +0100992 ++tgt->dont_block;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200993 INIT_LIST_HEAD(&lu->orb_list);
994 INIT_DELAYED_WORK(&lu->work, sbp2_login);
995
996 list_add_tail(&lu->link, &tgt->lu_list);
997 return 0;
998}
999
Stefan Richter13b302d2009-12-26 01:44:10 +01001000static int sbp2_scan_logical_unit_dir(struct sbp2_target *tgt,
1001 const u32 *directory)
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001002{
1003 struct fw_csr_iterator ci;
1004 int key, value;
1005
1006 fw_csr_iterator_init(&ci, directory);
1007 while (fw_csr_iterator_next(&ci, &key, &value))
1008 if (key == SBP2_CSR_LOGICAL_UNIT_NUMBER &&
1009 sbp2_add_logical_unit(tgt, value) < 0)
1010 return -ENOMEM;
1011 return 0;
1012}
1013
Stefan Richter13b302d2009-12-26 01:44:10 +01001014static int sbp2_scan_unit_dir(struct sbp2_target *tgt, const u32 *directory,
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001015 u32 *model, u32 *firmware_revision)
1016{
1017 struct fw_csr_iterator ci;
1018 int key, value;
1019
1020 fw_csr_iterator_init(&ci, directory);
1021 while (fw_csr_iterator_next(&ci, &key, &value)) {
1022 switch (key) {
1023
1024 case CSR_DEPENDENT_INFO | CSR_OFFSET:
1025 tgt->management_agent_address =
1026 CSR_REGISTER_BASE + 4 * value;
1027 break;
1028
1029 case CSR_DIRECTORY_ID:
1030 tgt->directory_id = value;
1031 break;
1032
1033 case CSR_MODEL:
1034 *model = value;
1035 break;
1036
1037 case SBP2_CSR_FIRMWARE_REVISION:
1038 *firmware_revision = value;
1039 break;
1040
Jarod Wilson384170d2008-01-25 23:31:12 -05001041 case SBP2_CSR_UNIT_CHARACTERISTICS:
1042 /* the timeout value is stored in 500ms units */
Stefan Richtereaf76e02009-10-08 00:39:31 +02001043 tgt->mgt_orb_timeout = (value >> 8 & 0xff) * 500;
Jarod Wilson384170d2008-01-25 23:31:12 -05001044 break;
1045
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001046 case SBP2_CSR_LOGICAL_UNIT_NUMBER:
1047 if (sbp2_add_logical_unit(tgt, value) < 0)
1048 return -ENOMEM;
1049 break;
1050
1051 case SBP2_CSR_LOGICAL_UNIT_DIRECTORY:
Richard Sharpe0e3e2ea2008-06-24 19:11:13 -07001052 /* Adjust for the increment in the iterator */
1053 if (sbp2_scan_logical_unit_dir(tgt, ci.p - 1 + value) < 0)
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001054 return -ENOMEM;
1055 break;
1056 }
1057 }
1058 return 0;
1059}
1060
Stefan Richtereaf76e02009-10-08 00:39:31 +02001061/*
1062 * Per section 7.4.8 of the SBP-2 spec, a mgt_ORB_timeout value can be
1063 * provided in the config rom. Most devices do provide a value, which
1064 * we'll use for login management orbs, but with some sane limits.
1065 */
1066static void sbp2_clamp_management_orb_timeout(struct sbp2_target *tgt)
1067{
1068 unsigned int timeout = tgt->mgt_orb_timeout;
1069
1070 if (timeout > 40000)
1071 fw_notify("%s: %ds mgt_ORB_timeout limited to 40s\n",
1072 tgt->bus_id, timeout / 1000);
1073
1074 tgt->mgt_orb_timeout = clamp_val(timeout, 5000, 40000);
1075}
1076
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001077static void sbp2_init_workarounds(struct sbp2_target *tgt, u32 model,
1078 u32 firmware_revision)
1079{
1080 int i;
Stefan Richter05cca732008-01-26 17:42:45 +01001081 unsigned int w = sbp2_param_workarounds;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001082
Stefan Richter2df222b2007-08-13 17:48:25 +02001083 if (w)
1084 fw_notify("Please notify linux1394-devel@lists.sourceforge.net "
1085 "if you need the workarounds parameter for %s\n",
Stefan Richter48f18c72008-02-03 23:09:50 +01001086 tgt->bus_id);
Stefan Richter2df222b2007-08-13 17:48:25 +02001087
1088 if (w & SBP2_WORKAROUND_OVERRIDE)
1089 goto out;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001090
1091 for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) {
1092
1093 if (sbp2_workarounds_table[i].firmware_revision !=
1094 (firmware_revision & 0xffffff00))
1095 continue;
1096
1097 if (sbp2_workarounds_table[i].model != model &&
Stefan Richterf7460722009-01-24 19:41:46 +01001098 sbp2_workarounds_table[i].model != SBP2_ROM_VALUE_WILDCARD)
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001099 continue;
1100
Stefan Richter2df222b2007-08-13 17:48:25 +02001101 w |= sbp2_workarounds_table[i].workarounds;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001102 break;
1103 }
Stefan Richter2df222b2007-08-13 17:48:25 +02001104 out:
1105 if (w)
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001106 fw_notify("Workarounds for %s: 0x%x "
1107 "(firmware_revision 0x%06x, model_id 0x%06x)\n",
Stefan Richter48f18c72008-02-03 23:09:50 +01001108 tgt->bus_id, w, firmware_revision, model);
Stefan Richter2df222b2007-08-13 17:48:25 +02001109 tgt->workarounds = w;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001110}
1111
1112static struct scsi_host_template scsi_driver_template;
Stefan Richter32ce38f2011-08-27 15:35:23 +02001113static int sbp2_remove(struct device *dev);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001114
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001115static int sbp2_probe(struct device *dev)
1116{
1117 struct fw_unit *unit = fw_unit(dev);
Stefan Richtere5110d02009-06-06 18:35:27 +02001118 struct fw_device *device = fw_parent_device(unit);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001119 struct sbp2_target *tgt;
1120 struct sbp2_logical_unit *lu;
1121 struct Scsi_Host *shost;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001122 u32 model, firmware_revision;
1123
Stefan Richter09b12dd2008-08-14 21:47:21 +02001124 if (dma_get_max_seg_size(device->card->device) > SBP2_MAX_SEG_SIZE)
1125 BUG_ON(dma_set_max_seg_size(device->card->device,
1126 SBP2_MAX_SEG_SIZE));
1127
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001128 shost = scsi_host_alloc(&scsi_driver_template, sizeof(*tgt));
1129 if (shost == NULL)
1130 return -ENOMEM;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001131
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001132 tgt = (struct sbp2_target *)shost->hostdata;
Greg Kroah-Hartmand9614502009-04-30 14:43:31 -07001133 dev_set_drvdata(&unit->device, tgt);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001134 tgt->unit = unit;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001135 INIT_LIST_HEAD(&tgt->lu_list);
Kay Sieversa1f64812008-10-30 01:41:56 +01001136 tgt->bus_id = dev_name(&unit->device);
Stefan Richterc9755e12008-03-24 20:54:28 +01001137 tgt->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4];
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001138
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001139 if (fw_device_enable_phys_dma(device) < 0)
1140 goto fail_shost_put;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001141
Stefan Richteraf271942009-06-30 20:27:59 +02001142 shost->max_cmd_len = SBP2_MAX_CDB_SIZE;
1143
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001144 if (scsi_add_host(shost, &unit->device) < 0)
1145 goto fail_shost_put;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001146
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001147 /* implicit directory ID */
1148 tgt->directory_id = ((unit->directory - device->config_rom) * 4
1149 + CSR_CONFIG_ROM) & 0xffffff;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001150
Stefan Richterf7460722009-01-24 19:41:46 +01001151 firmware_revision = SBP2_ROM_VALUE_MISSING;
1152 model = SBP2_ROM_VALUE_MISSING;
1153
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001154 if (sbp2_scan_unit_dir(tgt, unit->directory, &model,
1155 &firmware_revision) < 0)
Stefan Richter32ce38f2011-08-27 15:35:23 +02001156 goto fail_remove;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001157
Stefan Richtereaf76e02009-10-08 00:39:31 +02001158 sbp2_clamp_management_orb_timeout(tgt);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001159 sbp2_init_workarounds(tgt, model, firmware_revision);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001160
Stefan Richtera08e1002009-01-24 19:41:46 +01001161 /*
1162 * At S100 we can do 512 bytes per packet, at S200 1024 bytes,
1163 * and so on up to 4096 bytes. The SBP-2 max_payload field
1164 * specifies the max payload size as 2 ^ (max_payload + 2), so
1165 * if we set this to max_speed + 7, we get the right value.
1166 */
Stefan Richter4ec4a672011-09-19 00:20:48 +02001167 tgt->max_payload = min3(device->max_speed + 7, 10U,
1168 device->card->max_receive - 1);
Stefan Richtera08e1002009-01-24 19:41:46 +01001169
Stefan Richter285838e2007-11-07 01:12:51 +01001170 /* Do the login in a workqueue so we can easily reschedule retries. */
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001171 list_for_each_entry(lu, &tgt->lu_list, link)
Stefan Richter0dcfeb72008-10-22 00:28:36 +02001172 sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5));
Stefan Richter6ff81472011-08-27 15:33:34 +02001173
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001174 return 0;
Kristian Høgsbergad852742007-05-09 19:23:07 -04001175
Stefan Richter32ce38f2011-08-27 15:35:23 +02001176 fail_remove:
1177 sbp2_remove(dev);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001178 return -ENOMEM;
1179
1180 fail_shost_put:
1181 scsi_host_put(shost);
1182 return -ENOMEM;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001183}
1184
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001185static void sbp2_update(struct fw_unit *unit)
1186{
Greg Kroah-Hartmand9614502009-04-30 14:43:31 -07001187 struct sbp2_target *tgt = dev_get_drvdata(&unit->device);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001188 struct sbp2_logical_unit *lu;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001189
Stefan Richtere5110d02009-06-06 18:35:27 +02001190 fw_device_enable_phys_dma(fw_parent_device(unit));
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001191
1192 /*
1193 * Fw-core serializes sbp2_update() against sbp2_remove().
1194 * Iteration over tgt->lu_list is therefore safe here.
1195 */
1196 list_for_each_entry(lu, &tgt->lu_list, link) {
Stefan Richter2e2705b2008-02-16 16:37:28 +01001197 sbp2_conditionally_block(lu);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001198 lu->retries = 0;
Stefan Richter285838e2007-11-07 01:12:51 +01001199 sbp2_queue_work(lu, 0);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001200 }
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001201}
1202
Stefan Richter32ce38f2011-08-27 15:35:23 +02001203static int sbp2_remove(struct device *dev)
Stefan Richterb2af07b2011-08-27 15:34:32 +02001204{
Stefan Richter32ce38f2011-08-27 15:35:23 +02001205 struct fw_unit *unit = fw_unit(dev);
1206 struct fw_device *device = fw_parent_device(unit);
1207 struct sbp2_target *tgt = dev_get_drvdata(&unit->device);
Stefan Richterb2af07b2011-08-27 15:34:32 +02001208 struct sbp2_logical_unit *lu, *next;
1209 struct Scsi_Host *shost =
1210 container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
1211 struct scsi_device *sdev;
Stefan Richterb2af07b2011-08-27 15:34:32 +02001212
1213 /* prevent deadlocks */
1214 sbp2_unblock(tgt);
1215
1216 list_for_each_entry_safe(lu, next, &tgt->lu_list, link) {
Stefan Richter32ce38f2011-08-27 15:35:23 +02001217 cancel_delayed_work_sync(&lu->work);
Stefan Richterb2af07b2011-08-27 15:34:32 +02001218 sdev = scsi_device_lookup(shost, 0, 0, sbp2_lun2int(lu->lun));
1219 if (sdev) {
1220 scsi_remove_device(sdev);
1221 scsi_device_put(sdev);
1222 }
1223 if (lu->login_id != INVALID_LOGIN_ID) {
1224 int generation, node_id;
1225 /*
1226 * tgt->node_id may be obsolete here if we failed
1227 * during initial login or after a bus reset where
1228 * the topology changed.
1229 */
1230 generation = device->generation;
1231 smp_rmb(); /* node_id vs. generation */
1232 node_id = device->node_id;
1233 sbp2_send_management_orb(lu, node_id, generation,
1234 SBP2_LOGOUT_REQUEST,
1235 lu->login_id, NULL);
1236 }
1237 fw_core_remove_address_handler(&lu->address_handler);
1238 list_del(&lu->link);
1239 kfree(lu);
1240 }
1241 scsi_remove_host(shost);
1242 fw_notify("released %s, target %d:0:0\n", tgt->bus_id, shost->host_no);
1243
1244 scsi_host_put(shost);
Stefan Richterb2af07b2011-08-27 15:34:32 +02001245 return 0;
1246}
1247
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001248#define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e
1249#define SBP2_SW_VERSION_ENTRY 0x00010483
1250
Stefan Richterb3b29882009-02-15 23:12:34 +01001251static const struct ieee1394_device_id sbp2_id_table[] = {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001252 {
Stefan Richterb3b29882009-02-15 23:12:34 +01001253 .match_flags = IEEE1394_MATCH_SPECIFIER_ID |
1254 IEEE1394_MATCH_VERSION,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001255 .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY,
Stefan Richter5af4e5e2007-01-21 20:45:32 +01001256 .version = SBP2_SW_VERSION_ENTRY,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001257 },
1258 { }
1259};
1260
1261static struct fw_driver sbp2_driver = {
1262 .driver = {
1263 .owner = THIS_MODULE,
1264 .name = sbp2_driver_name,
1265 .bus = &fw_bus_type,
1266 .probe = sbp2_probe,
1267 .remove = sbp2_remove,
1268 },
1269 .update = sbp2_update,
1270 .id_table = sbp2_id_table,
1271};
1272
Stefan Richter5e212562009-01-28 01:03:34 +01001273static void sbp2_unmap_scatterlist(struct device *card_device,
1274 struct sbp2_command_orb *orb)
1275{
1276 if (scsi_sg_count(orb->cmd))
1277 dma_unmap_sg(card_device, scsi_sglist(orb->cmd),
1278 scsi_sg_count(orb->cmd),
1279 orb->cmd->sc_data_direction);
1280
1281 if (orb->request.misc & cpu_to_be32(COMMAND_ORB_PAGE_TABLE_PRESENT))
1282 dma_unmap_single(card_device, orb->page_table_bus,
1283 sizeof(orb->page_table), DMA_TO_DEVICE);
1284}
1285
Stefan Richter53dca512008-12-14 21:47:04 +01001286static unsigned int sbp2_status_to_sense_data(u8 *sbp2_status, u8 *sense_data)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001287{
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001288 int sam_status;
1289
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001290 sense_data[0] = 0x70;
1291 sense_data[1] = 0x0;
1292 sense_data[2] = sbp2_status[1];
1293 sense_data[3] = sbp2_status[4];
1294 sense_data[4] = sbp2_status[5];
1295 sense_data[5] = sbp2_status[6];
1296 sense_data[6] = sbp2_status[7];
1297 sense_data[7] = 10;
1298 sense_data[8] = sbp2_status[8];
1299 sense_data[9] = sbp2_status[9];
1300 sense_data[10] = sbp2_status[10];
1301 sense_data[11] = sbp2_status[11];
1302 sense_data[12] = sbp2_status[2];
1303 sense_data[13] = sbp2_status[3];
1304 sense_data[14] = sbp2_status[12];
1305 sense_data[15] = sbp2_status[13];
1306
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001307 sam_status = sbp2_status[0] & 0x3f;
1308
1309 switch (sam_status) {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001310 case SAM_STAT_GOOD:
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001311 case SAM_STAT_CHECK_CONDITION:
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001312 case SAM_STAT_CONDITION_MET:
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001313 case SAM_STAT_BUSY:
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001314 case SAM_STAT_RESERVATION_CONFLICT:
1315 case SAM_STAT_COMMAND_TERMINATED:
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001316 return DID_OK << 16 | sam_status;
1317
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001318 default:
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001319 return DID_ERROR << 16;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001320 }
1321}
1322
Stefan Richter53dca512008-12-14 21:47:04 +01001323static void complete_command_orb(struct sbp2_orb *base_orb,
1324 struct sbp2_status *status)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001325{
Jay Fenlason6f061482007-06-27 16:04:33 -04001326 struct sbp2_command_orb *orb =
1327 container_of(base_orb, struct sbp2_command_orb, base);
Stefan Richtere5110d02009-06-06 18:35:27 +02001328 struct fw_device *device = target_device(orb->lu->tgt);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001329 int result;
1330
1331 if (status != NULL) {
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001332 if (STATUS_GET_DEAD(*status))
Stefan Richtere0e60212008-02-03 23:08:58 +01001333 sbp2_agent_reset_no_wait(orb->lu);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001334
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001335 switch (STATUS_GET_RESPONSE(*status)) {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001336 case SBP2_STATUS_REQUEST_COMPLETE:
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001337 result = DID_OK << 16;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001338 break;
1339 case SBP2_STATUS_TRANSPORT_FAILURE:
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001340 result = DID_BUS_BUSY << 16;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001341 break;
1342 case SBP2_STATUS_ILLEGAL_REQUEST:
1343 case SBP2_STATUS_VENDOR_DEPENDENT:
1344 default:
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001345 result = DID_ERROR << 16;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001346 break;
1347 }
1348
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001349 if (result == DID_OK << 16 && STATUS_GET_LEN(*status) > 1)
1350 result = sbp2_status_to_sense_data(STATUS_GET_DATA(*status),
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001351 orb->cmd->sense_buffer);
1352 } else {
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001353 /*
1354 * If the orb completes with status == NULL, something
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001355 * went wrong, typically a bus reset happened mid-orb
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001356 * or when sending the write (less likely).
1357 */
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001358 result = DID_BUS_BUSY << 16;
Stefan Richter2e2705b2008-02-16 16:37:28 +01001359 sbp2_conditionally_block(orb->lu);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001360 }
1361
1362 dma_unmap_single(device->card->device, orb->base.request_bus,
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -04001363 sizeof(orb->request), DMA_TO_DEVICE);
Stefan Richter5e212562009-01-28 01:03:34 +01001364 sbp2_unmap_scatterlist(device->card->device, orb);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001365
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001366 orb->cmd->result = result;
Stefan Richterb75ca5e2011-04-22 12:21:44 +02001367 orb->cmd->scsi_done(orb->cmd);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001368}
1369
Stefan Richter53dca512008-12-14 21:47:04 +01001370static int sbp2_map_scatterlist(struct sbp2_command_orb *orb,
1371 struct fw_device *device, struct sbp2_logical_unit *lu)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001372{
Stefan Richter09b12dd2008-08-14 21:47:21 +02001373 struct scatterlist *sg = scsi_sglist(orb->cmd);
1374 int i, n;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001375
Stefan Richter09b12dd2008-08-14 21:47:21 +02001376 n = dma_map_sg(device->card->device, sg, scsi_sg_count(orb->cmd),
1377 orb->cmd->sc_data_direction);
1378 if (n == 0)
Kristian Høgsberg95ffc5e2007-05-09 19:23:08 -04001379 goto fail;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001380
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001381 /*
1382 * Handle the special case where there is only one element in
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001383 * the scatter list by converting it to an immediate block
1384 * request. This is also a workaround for broken devices such
1385 * as the second generation iPod which doesn't support page
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001386 * tables.
1387 */
Stefan Richter09b12dd2008-08-14 21:47:21 +02001388 if (n == 1) {
Stefan Richter71ee9f02008-02-28 20:51:11 +01001389 orb->request.data_descriptor.high =
1390 cpu_to_be32(lu->tgt->address_high);
1391 orb->request.data_descriptor.low =
1392 cpu_to_be32(sg_dma_address(sg));
1393 orb->request.misc |=
1394 cpu_to_be32(COMMAND_ORB_DATA_SIZE(sg_dma_len(sg)));
Kristian Høgsberg95ffc5e2007-05-09 19:23:08 -04001395 return 0;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001396 }
1397
Stefan Richter09b12dd2008-08-14 21:47:21 +02001398 for_each_sg(sg, sg, n, i) {
1399 orb->page_table[i].high = cpu_to_be32(sg_dma_len(sg) << 16);
1400 orb->page_table[i].low = cpu_to_be32(sg_dma_address(sg));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001401 }
1402
Stefan Richterb4be0162007-07-02 22:07:34 +02001403 orb->page_table_bus =
1404 dma_map_single(device->card->device, orb->page_table,
1405 sizeof(orb->page_table), DMA_TO_DEVICE);
FUJITA Tomonori8d8bb392008-07-25 19:44:49 -07001406 if (dma_mapping_error(device->card->device, orb->page_table_bus))
Stefan Richterb4be0162007-07-02 22:07:34 +02001407 goto fail_page_table;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001408
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001409 /*
1410 * The data_descriptor pointer is the one case where we need
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001411 * to fill in the node ID part of the address. All other
1412 * pointers assume that the data referenced reside on the
1413 * initiator (i.e. us), but data_descriptor can refer to data
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001414 * on other nodes so we need to put our ID in descriptor.high.
1415 */
Stefan Richter71ee9f02008-02-28 20:51:11 +01001416 orb->request.data_descriptor.high = cpu_to_be32(lu->tgt->address_high);
1417 orb->request.data_descriptor.low = cpu_to_be32(orb->page_table_bus);
1418 orb->request.misc |= cpu_to_be32(COMMAND_ORB_PAGE_TABLE_PRESENT |
Stefan Richter09b12dd2008-08-14 21:47:21 +02001419 COMMAND_ORB_DATA_SIZE(n));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001420
Kristian Høgsberg95ffc5e2007-05-09 19:23:08 -04001421 return 0;
1422
1423 fail_page_table:
Stefan Richter09b12dd2008-08-14 21:47:21 +02001424 dma_unmap_sg(device->card->device, scsi_sglist(orb->cmd),
1425 scsi_sg_count(orb->cmd), orb->cmd->sc_data_direction);
Kristian Høgsberg95ffc5e2007-05-09 19:23:08 -04001426 fail:
1427 return -ENOMEM;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001428}
1429
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001430/* SCSI stack integration */
1431
Stefan Richterb75ca5e2011-04-22 12:21:44 +02001432static int sbp2_scsi_queuecommand(struct Scsi_Host *shost,
1433 struct scsi_cmnd *cmd)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001434{
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001435 struct sbp2_logical_unit *lu = cmd->device->hostdata;
Stefan Richtere5110d02009-06-06 18:35:27 +02001436 struct fw_device *device = target_device(lu->tgt);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001437 struct sbp2_command_orb *orb;
Stefan Richter4bbc1bd2008-08-09 20:22:17 +02001438 int generation, retval = SCSI_MLQUEUE_HOST_BUSY;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001439
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001440 /*
1441 * Bidirectional commands are not yet implemented, and unknown
1442 * transfer direction not handled.
1443 */
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001444 if (cmd->sc_data_direction == DMA_BIDIRECTIONAL) {
Stefan Richter8a8cea22007-06-09 19:26:22 +02001445 fw_error("Can't handle DMA_BIDIRECTIONAL, rejecting command\n");
Kristian Høgsberge1b68c42007-05-09 19:23:09 -04001446 cmd->result = DID_ERROR << 16;
Stefan Richterb75ca5e2011-04-22 12:21:44 +02001447 cmd->scsi_done(cmd);
Kristian Høgsberge1b68c42007-05-09 19:23:09 -04001448 return 0;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001449 }
1450
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -04001451 orb = kzalloc(sizeof(*orb), GFP_ATOMIC);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001452 if (orb == NULL) {
1453 fw_notify("failed to alloc orb\n");
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001454 return SCSI_MLQUEUE_HOST_BUSY;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001455 }
1456
Kristian Høgsberg12f26aa2007-04-10 18:11:20 -04001457 /* Initialize rcode to something not RCODE_COMPLETE. */
1458 orb->base.rcode = -1;
Kristian Høgsberge57d2012007-08-24 18:59:58 -04001459 kref_init(&orb->base.kref);
Stefan Richterb75ca5e2011-04-22 12:21:44 +02001460 orb->lu = lu;
1461 orb->cmd = cmd;
Stefan Richtera08e1002009-01-24 19:41:46 +01001462 orb->request.next.high = cpu_to_be32(SBP2_ORB_NULL);
Stefan Richter71ee9f02008-02-28 20:51:11 +01001463 orb->request.misc = cpu_to_be32(
Stefan Richtera08e1002009-01-24 19:41:46 +01001464 COMMAND_ORB_MAX_PAYLOAD(lu->tgt->max_payload) |
Stefan Richterf1397492007-06-10 21:31:36 +02001465 COMMAND_ORB_SPEED(device->max_speed) |
Stefan Richter71ee9f02008-02-28 20:51:11 +01001466 COMMAND_ORB_NOTIFY);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001467
1468 if (cmd->sc_data_direction == DMA_FROM_DEVICE)
Stefan Richter0d7dcbf2008-02-28 20:52:02 +01001469 orb->request.misc |= cpu_to_be32(COMMAND_ORB_DIRECTION);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001470
Stefan Richter4bbc1bd2008-08-09 20:22:17 +02001471 generation = device->generation;
1472 smp_rmb(); /* sbp2_map_scatterlist looks at tgt->address_high */
1473
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001474 if (scsi_sg_count(cmd) && sbp2_map_scatterlist(orb, device, lu) < 0)
1475 goto out;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001476
Boaz Harrosh64a87b22008-04-30 11:19:47 +03001477 memcpy(orb->request.command_block, cmd->cmnd, cmd->cmd_len);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001478
1479 orb->base.callback = complete_command_orb;
Stefan Richter85263922007-07-02 21:04:08 +02001480 orb->base.request_bus =
1481 dma_map_single(device->card->device, &orb->request,
1482 sizeof(orb->request), DMA_TO_DEVICE);
Stefan Richter5e212562009-01-28 01:03:34 +01001483 if (dma_mapping_error(device->card->device, orb->base.request_bus)) {
1484 sbp2_unmap_scatterlist(device->card->device, orb);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001485 goto out;
Stefan Richter5e212562009-01-28 01:03:34 +01001486 }
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001487
Stefan Richter4bbc1bd2008-08-09 20:22:17 +02001488 sbp2_send_orb(&orb->base, lu, lu->tgt->node_id, generation,
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001489 lu->command_block_agent_address + SBP2_ORB_POINTER);
1490 retval = 0;
1491 out:
Kristian Høgsberge57d2012007-08-24 18:59:58 -04001492 kref_put(&orb->base.kref, free_orb);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001493 return retval;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001494}
1495
Stefan Richtercfb01382007-01-23 21:20:08 +01001496static int sbp2_scsi_slave_alloc(struct scsi_device *sdev)
1497{
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001498 struct sbp2_logical_unit *lu = sdev->hostdata;
Stefan Richtercfb01382007-01-23 21:20:08 +01001499
Stefan Richter5513c5f2008-02-17 14:56:19 +01001500 /* (Re-)Adding logical units via the SCSI stack is not supported. */
1501 if (!lu)
1502 return -ENOSYS;
1503
Stefan Richtercfb01382007-01-23 21:20:08 +01001504 sdev->allow_restart = 1;
1505
Stefan Richter8ac3a472008-01-27 22:31:27 +01001506 /* SBP-2 requires quadlet alignment of the data buffers. */
1507 blk_queue_update_dma_alignment(sdev->request_queue, 4 - 1);
James Bottomley465ff312008-01-01 10:00:10 -06001508
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001509 if (lu->tgt->workarounds & SBP2_WORKAROUND_INQUIRY_36)
Stefan Richtercfb01382007-01-23 21:20:08 +01001510 sdev->inquiry_len = 36;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001511
Stefan Richtercfb01382007-01-23 21:20:08 +01001512 return 0;
1513}
1514
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001515static int sbp2_scsi_slave_configure(struct scsi_device *sdev)
1516{
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001517 struct sbp2_logical_unit *lu = sdev->hostdata;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001518
Stefan Richtercfb01382007-01-23 21:20:08 +01001519 sdev->use_10_for_rw = 1;
1520
Stefan Richter2635f962008-05-11 00:36:47 +02001521 if (sbp2_param_exclusive_login)
1522 sdev->manage_start_stop = 1;
1523
Stefan Richtercfb01382007-01-23 21:20:08 +01001524 if (sdev->type == TYPE_ROM)
1525 sdev->use_10_for_ms = 1;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001526
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001527 if (sdev->type == TYPE_DISK &&
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001528 lu->tgt->workarounds & SBP2_WORKAROUND_MODE_SENSE_8)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001529 sdev->skip_ms_page_8 = 1;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001530
1531 if (lu->tgt->workarounds & SBP2_WORKAROUND_FIX_CAPACITY)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001532 sdev->fix_capacity = 1;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001533
Stefan Richterffcaade2008-05-11 00:35:04 +02001534 if (lu->tgt->workarounds & SBP2_WORKAROUND_POWER_CONDITION)
1535 sdev->start_stop_pwr_cond = 1;
1536
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001537 if (lu->tgt->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS)
Martin K. Petersen086fa5f2010-02-26 00:20:38 -05001538 blk_queue_max_hw_sectors(sdev->request_queue, 128 * 1024 / 512);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001539
Stefan Richter09b12dd2008-08-14 21:47:21 +02001540 blk_queue_max_segment_size(sdev->request_queue, SBP2_MAX_SEG_SIZE);
1541
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001542 return 0;
1543}
1544
1545/*
1546 * Called by scsi stack when something has really gone wrong. Usually
1547 * called when a command has timed-out for some reason.
1548 */
1549static int sbp2_scsi_abort(struct scsi_cmnd *cmd)
1550{
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001551 struct sbp2_logical_unit *lu = cmd->device->hostdata;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001552
Stefan Richter48f18c72008-02-03 23:09:50 +01001553 fw_notify("%s: sbp2_scsi_abort\n", lu->tgt->bus_id);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001554 sbp2_agent_reset(lu);
1555 sbp2_cancel_orbs(lu);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001556
1557 return SUCCESS;
1558}
1559
Stefan Richter14e21982007-05-27 13:18:27 +02001560/*
1561 * Format of /sys/bus/scsi/devices/.../ieee1394_id:
1562 * u64 EUI-64 : u24 directory_ID : u16 LUN (all printed in hexadecimal)
1563 *
1564 * This is the concatenation of target port identifier and logical unit
1565 * identifier as per SAM-2...SAM-4 annex A.
1566 */
Stefan Richter53dca512008-12-14 21:47:04 +01001567static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev,
1568 struct device_attribute *attr, char *buf)
Stefan Richter14e21982007-05-27 13:18:27 +02001569{
1570 struct scsi_device *sdev = to_scsi_device(dev);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001571 struct sbp2_logical_unit *lu;
Stefan Richter14e21982007-05-27 13:18:27 +02001572
1573 if (!sdev)
1574 return 0;
Stefan Richter14e21982007-05-27 13:18:27 +02001575
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001576 lu = sdev->hostdata;
Stefan Richter14e21982007-05-27 13:18:27 +02001577
Stefan Richterc9755e12008-03-24 20:54:28 +01001578 return sprintf(buf, "%016llx:%06x:%04x\n",
1579 (unsigned long long)lu->tgt->guid,
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001580 lu->tgt->directory_id, lu->lun);
Stefan Richter14e21982007-05-27 13:18:27 +02001581}
1582
1583static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL);
1584
1585static struct device_attribute *sbp2_scsi_sysfs_attrs[] = {
1586 &dev_attr_ieee1394_id,
1587 NULL
1588};
1589
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001590static struct scsi_host_template scsi_driver_template = {
1591 .module = THIS_MODULE,
1592 .name = "SBP-2 IEEE-1394",
Kristian Høgsbergb02b6bc2007-05-09 19:23:12 -04001593 .proc_name = sbp2_driver_name,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001594 .queuecommand = sbp2_scsi_queuecommand,
Stefan Richtercfb01382007-01-23 21:20:08 +01001595 .slave_alloc = sbp2_scsi_slave_alloc,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001596 .slave_configure = sbp2_scsi_slave_configure,
1597 .eh_abort_handler = sbp2_scsi_abort,
1598 .this_id = -1,
1599 .sg_tablesize = SG_ALL,
1600 .use_clustering = ENABLE_CLUSTERING,
Stefan Richter02af8e72007-01-21 20:50:11 +01001601 .cmd_per_lun = 1,
1602 .can_queue = 1,
Stefan Richter14e21982007-05-27 13:18:27 +02001603 .sdev_attrs = sbp2_scsi_sysfs_attrs,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001604};
1605
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001606MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>");
1607MODULE_DESCRIPTION("SCSI over IEEE1394");
1608MODULE_LICENSE("GPL");
1609MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table);
1610
Olaf Hering1e4c7b02007-05-05 23:17:13 +02001611/* Provide a module alias so root-on-sbp2 initrds don't break. */
1612#ifndef CONFIG_IEEE1394_SBP2_MODULE
1613MODULE_ALIAS("sbp2");
1614#endif
1615
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001616static int __init sbp2_init(void)
1617{
1618 return driver_register(&sbp2_driver.driver);
1619}
1620
1621static void __exit sbp2_cleanup(void)
1622{
1623 driver_unregister(&sbp2_driver.driver);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001624}
1625
1626module_init(sbp2_init);
1627module_exit(sbp2_cleanup);