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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 Richter9220f192008-02-03 23:04:38 +010032#include <linux/delay.h>
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -050033#include <linux/device.h>
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -050034#include <linux/dma-mapping.h>
Stefan Richter7bb6bf72008-02-03 23:12:17 +010035#include <linux/kernel.h>
36#include <linux/mod_devicetable.h>
37#include <linux/module.h>
38#include <linux/moduleparam.h>
39#include <linux/scatterlist.h>
Stefan Richtere7cdf232007-07-01 13:54:57 +020040#include <linux/string.h>
Stefan Richter2df222b2007-08-13 17:48:25 +020041#include <linux/stringify.h>
Kristian Høgsberg1d3d52c2007-02-06 14:49:33 -050042#include <linux/timer.h>
Stefan Richterdf8ec242007-08-12 12:51:18 +020043#include <linux/workqueue.h>
Stefan Richterb5d2a5e2008-01-25 18:57:41 +010044#include <asm/system.h>
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -050045
46#include <scsi/scsi.h>
47#include <scsi/scsi_cmnd.h>
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -050048#include <scsi/scsi_device.h>
49#include <scsi/scsi_host.h>
50
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -050051#include "fw-device.h"
Stefan Richter7bb6bf72008-02-03 23:12:17 +010052#include "fw-topology.h"
53#include "fw-transaction.h"
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -050054
Stefan Richter5cd54c92007-06-17 23:55:41 +020055/*
56 * So far only bridges from Oxford Semiconductor are known to support
57 * concurrent logins. Depending on firmware, four or two concurrent logins
58 * are possible on OXFW911 and newer Oxsemi bridges.
59 *
60 * Concurrent logins are useful together with cluster filesystems.
61 */
62static int sbp2_param_exclusive_login = 1;
63module_param_named(exclusive_login, sbp2_param_exclusive_login, bool, 0644);
64MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device "
65 "(default = Y, use N for concurrent initiators)");
66
Stefan Richter2df222b2007-08-13 17:48:25 +020067/*
68 * Flags for firmware oddities
69 *
70 * - 128kB max transfer
71 * Limit transfer size. Necessary for some old bridges.
72 *
73 * - 36 byte inquiry
74 * When scsi_mod probes the device, let the inquiry command look like that
75 * from MS Windows.
76 *
77 * - skip mode page 8
78 * Suppress sending of mode_sense for mode page 8 if the device pretends to
79 * support the SCSI Primary Block commands instead of Reduced Block Commands.
80 *
81 * - fix capacity
82 * Tell sd_mod to correct the last sector number reported by read_capacity.
83 * Avoids access beyond actual disk limits on devices with an off-by-one bug.
84 * Don't use this with devices which don't have this bug.
85 *
Stefan Richter9220f192008-02-03 23:04:38 +010086 * - delay inquiry
87 * Wait extra SBP2_INQUIRY_DELAY seconds after login before SCSI inquiry.
88 *
Stefan Richter2df222b2007-08-13 17:48:25 +020089 * - override internal blacklist
90 * Instead of adding to the built-in blacklist, use only the workarounds
91 * specified in the module load parameter.
92 * Useful if a blacklist entry interfered with a non-broken device.
93 */
94#define SBP2_WORKAROUND_128K_MAX_TRANS 0x1
95#define SBP2_WORKAROUND_INQUIRY_36 0x2
96#define SBP2_WORKAROUND_MODE_SENSE_8 0x4
97#define SBP2_WORKAROUND_FIX_CAPACITY 0x8
Stefan Richter9220f192008-02-03 23:04:38 +010098#define SBP2_WORKAROUND_DELAY_INQUIRY 0x10
99#define SBP2_INQUIRY_DELAY 12
Stefan Richter2df222b2007-08-13 17:48:25 +0200100#define SBP2_WORKAROUND_OVERRIDE 0x100
101
102static int sbp2_param_workarounds;
103module_param_named(workarounds, sbp2_param_workarounds, int, 0644);
104MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0"
105 ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS)
106 ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36)
107 ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8)
108 ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY)
Stefan Richter9220f192008-02-03 23:04:38 +0100109 ", delay inquiry = " __stringify(SBP2_WORKAROUND_DELAY_INQUIRY)
Stefan Richter2df222b2007-08-13 17:48:25 +0200110 ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE)
111 ", or a combination)");
112
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500113/* I don't know why the SCSI stack doesn't define something like this... */
Kristian Høgsberga98e2712007-05-07 20:33:34 -0400114typedef void (*scsi_done_fn_t)(struct scsi_cmnd *);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500115
116static const char sbp2_driver_name[] = "sbp2";
117
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200118/*
119 * We create one struct sbp2_logical_unit per SBP-2 Logical Unit Number Entry
120 * and one struct scsi_device per sbp2_logical_unit.
121 */
122struct sbp2_logical_unit {
123 struct sbp2_target *tgt;
124 struct list_head link;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500125 struct fw_address_handler address_handler;
126 struct list_head orb_list;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200127
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500128 u64 command_block_agent_address;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200129 u16 lun;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500130 int login_id;
131
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400132 /*
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200133 * The generation is updated once we've logged in or reconnected
134 * to the logical unit. Thus, I/O to the device will automatically
135 * fail and get retried if it happens in a window where the device
136 * is not ready, e.g. after a bus reset but before we reconnect.
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400137 */
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500138 int generation;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500139 int retries;
140 struct delayed_work work;
Stefan Richterf8436152008-02-26 23:30:02 +0100141 bool has_sdev;
Stefan Richter2e2705b2008-02-16 16:37:28 +0100142 bool blocked;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500143};
144
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200145/*
146 * We create one struct sbp2_target per IEEE 1212 Unit Directory
147 * and one struct Scsi_Host per sbp2_target.
148 */
149struct sbp2_target {
150 struct kref kref;
151 struct fw_unit *unit;
Stefan Richter48f18c72008-02-03 23:09:50 +0100152 const char *bus_id;
Stefan Richter05cca732008-01-26 17:42:45 +0100153 struct list_head lu_list;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200154
155 u64 management_agent_address;
156 int directory_id;
157 int node_id;
158 int address_high;
Stefan Richter05cca732008-01-26 17:42:45 +0100159 unsigned int workarounds;
Jarod Wilson384170d2008-01-25 23:31:12 -0500160 unsigned int mgt_orb_timeout;
Stefan Richter2e2705b2008-02-16 16:37:28 +0100161
162 int dont_block; /* counter for each logical unit */
163 int blocked; /* ditto */
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200164};
165
Jarod Wilsona4c379c2008-01-19 13:15:05 +0100166/*
167 * Per section 7.4.8 of the SBP-2 spec, a mgt_ORB_timeout value can be
Jarod Wilson384170d2008-01-25 23:31:12 -0500168 * provided in the config rom. Most devices do provide a value, which
169 * we'll use for login management orbs, but with some sane limits.
Jarod Wilsona4c379c2008-01-19 13:15:05 +0100170 */
Jarod Wilson384170d2008-01-25 23:31:12 -0500171#define SBP2_MIN_LOGIN_ORB_TIMEOUT 5000U /* Timeout in ms */
172#define SBP2_MAX_LOGIN_ORB_TIMEOUT 40000U /* Timeout in ms */
Stefan Richter05cca732008-01-26 17:42:45 +0100173#define SBP2_ORB_TIMEOUT 2000U /* Timeout in ms */
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500174#define SBP2_ORB_NULL 0x80000000
Jarod Wilsona4c379c2008-01-19 13:15:05 +0100175#define SBP2_MAX_SG_ELEMENT_LENGTH 0xf000
Jarod Wilson17cff9f2008-03-07 01:43:31 -0500176#define SBP2_RETRY_LIMIT 0xf /* 15 retries */
177#define SBP2_CYCLE_LIMIT (0xc8 << 12) /* 200 125us cycles */
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500178
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500179/* Unit directory keys */
Jarod Wilson384170d2008-01-25 23:31:12 -0500180#define SBP2_CSR_UNIT_CHARACTERISTICS 0x3a
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200181#define SBP2_CSR_FIRMWARE_REVISION 0x3c
182#define SBP2_CSR_LOGICAL_UNIT_NUMBER 0x14
183#define SBP2_CSR_LOGICAL_UNIT_DIRECTORY 0xd4
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500184
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500185/* Management orb opcodes */
186#define SBP2_LOGIN_REQUEST 0x0
187#define SBP2_QUERY_LOGINS_REQUEST 0x1
188#define SBP2_RECONNECT_REQUEST 0x3
189#define SBP2_SET_PASSWORD_REQUEST 0x4
190#define SBP2_LOGOUT_REQUEST 0x7
191#define SBP2_ABORT_TASK_REQUEST 0xb
192#define SBP2_ABORT_TASK_SET 0xc
193#define SBP2_LOGICAL_UNIT_RESET 0xe
194#define SBP2_TARGET_RESET_REQUEST 0xf
195
196/* Offsets for command block agent registers */
197#define SBP2_AGENT_STATE 0x00
198#define SBP2_AGENT_RESET 0x04
199#define SBP2_ORB_POINTER 0x08
200#define SBP2_DOORBELL 0x10
201#define SBP2_UNSOLICITED_STATUS_ENABLE 0x14
202
203/* Status write response codes */
204#define SBP2_STATUS_REQUEST_COMPLETE 0x0
205#define SBP2_STATUS_TRANSPORT_FAILURE 0x1
206#define SBP2_STATUS_ILLEGAL_REQUEST 0x2
207#define SBP2_STATUS_VENDOR_DEPENDENT 0x3
208
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400209#define STATUS_GET_ORB_HIGH(v) ((v).status & 0xffff)
210#define STATUS_GET_SBP_STATUS(v) (((v).status >> 16) & 0xff)
211#define STATUS_GET_LEN(v) (((v).status >> 24) & 0x07)
212#define STATUS_GET_DEAD(v) (((v).status >> 27) & 0x01)
213#define STATUS_GET_RESPONSE(v) (((v).status >> 28) & 0x03)
214#define STATUS_GET_SOURCE(v) (((v).status >> 30) & 0x03)
215#define STATUS_GET_ORB_LOW(v) ((v).orb_low)
216#define STATUS_GET_DATA(v) ((v).data)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500217
218struct sbp2_status {
219 u32 status;
220 u32 orb_low;
221 u8 data[24];
222};
223
224struct sbp2_pointer {
Stefan Richter71ee9f02008-02-28 20:51:11 +0100225 __be32 high;
226 __be32 low;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500227};
228
229struct sbp2_orb {
230 struct fw_transaction t;
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400231 struct kref kref;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500232 dma_addr_t request_bus;
233 int rcode;
234 struct sbp2_pointer pointer;
Kristian Høgsberga98e2712007-05-07 20:33:34 -0400235 void (*callback)(struct sbp2_orb * orb, struct sbp2_status * status);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500236 struct list_head link;
237};
238
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400239#define MANAGEMENT_ORB_LUN(v) ((v))
240#define MANAGEMENT_ORB_FUNCTION(v) ((v) << 16)
241#define MANAGEMENT_ORB_RECONNECT(v) ((v) << 20)
Stefan Richter5cd54c92007-06-17 23:55:41 +0200242#define MANAGEMENT_ORB_EXCLUSIVE(v) ((v) ? 1 << 28 : 0)
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400243#define MANAGEMENT_ORB_REQUEST_FORMAT(v) ((v) << 29)
244#define MANAGEMENT_ORB_NOTIFY ((1) << 31)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500245
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400246#define MANAGEMENT_ORB_RESPONSE_LENGTH(v) ((v))
247#define MANAGEMENT_ORB_PASSWORD_LENGTH(v) ((v) << 16)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500248
249struct sbp2_management_orb {
250 struct sbp2_orb base;
251 struct {
252 struct sbp2_pointer password;
253 struct sbp2_pointer response;
Stefan Richter71ee9f02008-02-28 20:51:11 +0100254 __be32 misc;
255 __be32 length;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500256 struct sbp2_pointer status_fifo;
257 } request;
258 __be32 response[4];
259 dma_addr_t response_bus;
260 struct completion done;
261 struct sbp2_status status;
262};
263
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500264struct sbp2_login_response {
Stefan Richter71ee9f02008-02-28 20:51:11 +0100265 __be32 misc;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500266 struct sbp2_pointer command_block_agent;
Stefan Richter71ee9f02008-02-28 20:51:11 +0100267 __be32 reconnect_hold;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500268};
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400269#define COMMAND_ORB_DATA_SIZE(v) ((v))
270#define COMMAND_ORB_PAGE_SIZE(v) ((v) << 16)
271#define COMMAND_ORB_PAGE_TABLE_PRESENT ((1) << 19)
272#define COMMAND_ORB_MAX_PAYLOAD(v) ((v) << 20)
273#define COMMAND_ORB_SPEED(v) ((v) << 24)
Stefan Richter0d7dcbf2008-02-28 20:52:02 +0100274#define COMMAND_ORB_DIRECTION ((1) << 27)
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400275#define COMMAND_ORB_REQUEST_FORMAT(v) ((v) << 29)
276#define COMMAND_ORB_NOTIFY ((1) << 31)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500277
278struct sbp2_command_orb {
279 struct sbp2_orb base;
280 struct {
281 struct sbp2_pointer next;
282 struct sbp2_pointer data_descriptor;
Stefan Richter71ee9f02008-02-28 20:51:11 +0100283 __be32 misc;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500284 u8 command_block[12];
285 } request;
286 struct scsi_cmnd *cmd;
287 scsi_done_fn_t done;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200288 struct sbp2_logical_unit *lu;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500289
Stefan Richter9fb2dd12007-07-01 13:55:31 +0200290 struct sbp2_pointer page_table[SG_ALL] __attribute__((aligned(8)));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500291 dma_addr_t page_table_bus;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500292};
293
294/*
295 * List of devices with known bugs.
296 *
297 * The firmware_revision field, masked with 0xffff00, is the best
298 * indicator for the type of bridge chip of a device. It yields a few
299 * false positives but this did not break correctly behaving devices
300 * so far. We use ~0 as a wildcard, since the 24 bit values we get
301 * from the config rom can never match that.
302 */
303static const struct {
304 u32 firmware_revision;
305 u32 model;
Stefan Richter05cca732008-01-26 17:42:45 +0100306 unsigned int workarounds;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500307} sbp2_workarounds_table[] = {
308 /* DViCO Momobay CX-1 with TSB42AA9 bridge */ {
309 .firmware_revision = 0x002800,
310 .model = 0x001010,
311 .workarounds = SBP2_WORKAROUND_INQUIRY_36 |
312 SBP2_WORKAROUND_MODE_SENSE_8,
313 },
Stefan Richter9220f192008-02-03 23:04:38 +0100314 /* DViCO Momobay FX-3A with TSB42AA9A bridge */ {
315 .firmware_revision = 0x002800,
316 .model = 0x000000,
317 .workarounds = SBP2_WORKAROUND_DELAY_INQUIRY,
318 },
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500319 /* Initio bridges, actually only needed for some older ones */ {
320 .firmware_revision = 0x000200,
321 .model = ~0,
322 .workarounds = SBP2_WORKAROUND_INQUIRY_36,
323 },
324 /* Symbios bridge */ {
325 .firmware_revision = 0xa0b800,
326 .model = ~0,
327 .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS,
328 },
Stefan Richter2aa9ff72008-03-11 22:32:03 +0100329 /* Datafab MD2-FW2 with Symbios/LSILogic SYM13FW500 bridge */ {
330 .firmware_revision = 0x002600,
331 .model = ~0,
332 .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS,
333 },
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400334
335 /*
336 * There are iPods (2nd gen, 3rd gen) with model_id == 0, but
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500337 * these iPods do not feature the read_capacity bug according
338 * to one report. Read_capacity behaviour as well as model_id
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400339 * could change due to Apple-supplied firmware updates though.
340 */
341
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500342 /* iPod 4th generation. */ {
343 .firmware_revision = 0x0a2700,
344 .model = 0x000021,
345 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
346 },
347 /* iPod mini */ {
348 .firmware_revision = 0x0a2700,
349 .model = 0x000023,
350 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
351 },
352 /* iPod Photo */ {
353 .firmware_revision = 0x0a2700,
354 .model = 0x00007e,
355 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
356 }
357};
358
359static void
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400360free_orb(struct kref *kref)
361{
362 struct sbp2_orb *orb = container_of(kref, struct sbp2_orb, kref);
363
364 kfree(orb);
365}
366
367static void
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500368sbp2_status_write(struct fw_card *card, struct fw_request *request,
369 int tcode, int destination, int source,
370 int generation, int speed,
371 unsigned long long offset,
372 void *payload, size_t length, void *callback_data)
373{
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200374 struct sbp2_logical_unit *lu = callback_data;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500375 struct sbp2_orb *orb;
376 struct sbp2_status status;
377 size_t header_size;
378 unsigned long flags;
379
380 if (tcode != TCODE_WRITE_BLOCK_REQUEST ||
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400381 length == 0 || length > sizeof(status)) {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500382 fw_send_response(card, request, RCODE_TYPE_ERROR);
383 return;
384 }
385
386 header_size = min(length, 2 * sizeof(u32));
387 fw_memcpy_from_be32(&status, payload, header_size);
388 if (length > header_size)
389 memcpy(status.data, payload + 8, length - header_size);
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400390 if (STATUS_GET_SOURCE(status) == 2 || STATUS_GET_SOURCE(status) == 3) {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500391 fw_notify("non-orb related status write, not handled\n");
392 fw_send_response(card, request, RCODE_COMPLETE);
393 return;
394 }
395
396 /* Lookup the orb corresponding to this status write. */
397 spin_lock_irqsave(&card->lock, flags);
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200398 list_for_each_entry(orb, &lu->orb_list, link) {
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400399 if (STATUS_GET_ORB_HIGH(status) == 0 &&
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400400 STATUS_GET_ORB_LOW(status) == orb->request_bus) {
401 orb->rcode = RCODE_COMPLETE;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500402 list_del(&orb->link);
403 break;
404 }
405 }
406 spin_unlock_irqrestore(&card->lock, flags);
407
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200408 if (&orb->link != &lu->orb_list)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500409 orb->callback(orb, &status);
410 else
411 fw_error("status write for unknown orb\n");
412
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400413 kref_put(&orb->kref, free_orb);
414
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500415 fw_send_response(card, request, RCODE_COMPLETE);
416}
417
418static void
419complete_transaction(struct fw_card *card, int rcode,
420 void *payload, size_t length, void *data)
421{
422 struct sbp2_orb *orb = data;
423 unsigned long flags;
424
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400425 /*
426 * This is a little tricky. We can get the status write for
427 * the orb before we get this callback. The status write
428 * handler above will assume the orb pointer transaction was
429 * successful and set the rcode to RCODE_COMPLETE for the orb.
430 * So this callback only sets the rcode if it hasn't already
431 * been set and only does the cleanup if the transaction
432 * failed and we didn't already get a status write.
433 */
434 spin_lock_irqsave(&card->lock, flags);
435
436 if (orb->rcode == -1)
437 orb->rcode = rcode;
438 if (orb->rcode != RCODE_COMPLETE) {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500439 list_del(&orb->link);
Stefan Richter1b34e972007-08-25 10:40:42 +0200440 spin_unlock_irqrestore(&card->lock, flags);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500441 orb->callback(orb, NULL);
Stefan Richter1b34e972007-08-25 10:40:42 +0200442 } else {
443 spin_unlock_irqrestore(&card->lock, flags);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500444 }
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400445
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400446 kref_put(&orb->kref, free_orb);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500447}
448
449static void
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200450sbp2_send_orb(struct sbp2_orb *orb, struct sbp2_logical_unit *lu,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500451 int node_id, int generation, u64 offset)
452{
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200453 struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500454 unsigned long flags;
455
456 orb->pointer.high = 0;
Stefan Richter71ee9f02008-02-28 20:51:11 +0100457 orb->pointer.low = cpu_to_be32(orb->request_bus);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500458
459 spin_lock_irqsave(&device->card->lock, flags);
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200460 list_add_tail(&orb->link, &lu->orb_list);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500461 spin_unlock_irqrestore(&device->card->lock, flags);
462
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400463 /* Take a ref for the orb list and for the transaction callback. */
464 kref_get(&orb->kref);
465 kref_get(&orb->kref);
466
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500467 fw_send_request(device->card, &orb->t, TCODE_WRITE_BLOCK_REQUEST,
Stefan Richterf1397492007-06-10 21:31:36 +0200468 node_id, generation, device->max_speed, offset,
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400469 &orb->pointer, sizeof(orb->pointer),
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500470 complete_transaction, orb);
471}
472
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200473static int sbp2_cancel_orbs(struct sbp2_logical_unit *lu)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500474{
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200475 struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500476 struct sbp2_orb *orb, *next;
477 struct list_head list;
478 unsigned long flags;
Kristian Høgsberg2aaad972007-03-07 12:12:47 -0500479 int retval = -ENOENT;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500480
481 INIT_LIST_HEAD(&list);
482 spin_lock_irqsave(&device->card->lock, flags);
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200483 list_splice_init(&lu->orb_list, &list);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500484 spin_unlock_irqrestore(&device->card->lock, flags);
485
486 list_for_each_entry_safe(orb, next, &list, link) {
Kristian Høgsberg2aaad972007-03-07 12:12:47 -0500487 retval = 0;
Kristian Høgsberg730c32f2007-02-06 14:49:32 -0500488 if (fw_cancel_transaction(device->card, &orb->t) == 0)
489 continue;
490
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500491 orb->rcode = RCODE_CANCELLED;
492 orb->callback(orb, NULL);
493 }
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500494
Kristian Høgsberg2aaad972007-03-07 12:12:47 -0500495 return retval;
Kristian Høgsberg1d3d52c2007-02-06 14:49:33 -0500496}
497
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500498static void
499complete_management_orb(struct sbp2_orb *base_orb, struct sbp2_status *status)
500{
501 struct sbp2_management_orb *orb =
Jay Fenlason6f061482007-06-27 16:04:33 -0400502 container_of(base_orb, struct sbp2_management_orb, base);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500503
504 if (status)
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400505 memcpy(&orb->status, status, sizeof(*status));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500506 complete(&orb->done);
507}
508
509static int
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200510sbp2_send_management_orb(struct sbp2_logical_unit *lu, int node_id,
511 int generation, int function, int lun_or_login_id,
512 void *response)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500513{
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200514 struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500515 struct sbp2_management_orb *orb;
Jarod Wilsona4c379c2008-01-19 13:15:05 +0100516 unsigned int timeout;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500517 int retval = -ENOMEM;
518
Stefan Richterbe6f48b2008-01-27 19:14:44 +0100519 if (function == SBP2_LOGOUT_REQUEST && fw_device_is_shutdown(device))
520 return 0;
521
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400522 orb = kzalloc(sizeof(*orb), GFP_ATOMIC);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500523 if (orb == NULL)
524 return -ENOMEM;
525
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400526 kref_init(&orb->base.kref);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500527 orb->response_bus =
528 dma_map_single(device->card->device, &orb->response,
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400529 sizeof(orb->response), DMA_FROM_DEVICE);
Kristian Høgsberg82eff9d2007-02-06 14:49:40 -0500530 if (dma_mapping_error(orb->response_bus))
Stefan Richter7aa48482007-07-02 21:04:44 +0200531 goto fail_mapping_response;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500532
Stefan Richter71ee9f02008-02-28 20:51:11 +0100533 orb->request.response.high = 0;
534 orb->request.response.low = cpu_to_be32(orb->response_bus);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500535
Stefan Richter71ee9f02008-02-28 20:51:11 +0100536 orb->request.misc = cpu_to_be32(
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400537 MANAGEMENT_ORB_NOTIFY |
538 MANAGEMENT_ORB_FUNCTION(function) |
Stefan Richter71ee9f02008-02-28 20:51:11 +0100539 MANAGEMENT_ORB_LUN(lun_or_login_id));
540 orb->request.length = cpu_to_be32(
541 MANAGEMENT_ORB_RESPONSE_LENGTH(sizeof(orb->response)));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500542
Stefan Richter71ee9f02008-02-28 20:51:11 +0100543 orb->request.status_fifo.high =
544 cpu_to_be32(lu->address_handler.offset >> 32);
545 orb->request.status_fifo.low =
546 cpu_to_be32(lu->address_handler.offset);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500547
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500548 if (function == SBP2_LOGIN_REQUEST) {
Stefan Richter14dc9922008-01-20 01:25:31 +0100549 /* Ask for 2^2 == 4 seconds reconnect grace period */
Stefan Richter71ee9f02008-02-28 20:51:11 +0100550 orb->request.misc |= cpu_to_be32(
Stefan Richter14dc9922008-01-20 01:25:31 +0100551 MANAGEMENT_ORB_RECONNECT(2) |
Stefan Richter71ee9f02008-02-28 20:51:11 +0100552 MANAGEMENT_ORB_EXCLUSIVE(sbp2_param_exclusive_login));
Jarod Wilson384170d2008-01-25 23:31:12 -0500553 timeout = lu->tgt->mgt_orb_timeout;
Jarod Wilsona4c379c2008-01-19 13:15:05 +0100554 } else {
555 timeout = SBP2_ORB_TIMEOUT;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500556 }
557
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500558 init_completion(&orb->done);
559 orb->base.callback = complete_management_orb;
Kristian Høgsberg2aaad972007-03-07 12:12:47 -0500560
Stefan Richter7aa48482007-07-02 21:04:44 +0200561 orb->base.request_bus =
562 dma_map_single(device->card->device, &orb->request,
563 sizeof(orb->request), DMA_TO_DEVICE);
564 if (dma_mapping_error(orb->base.request_bus))
565 goto fail_mapping_request;
566
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200567 sbp2_send_orb(&orb->base, lu, node_id, generation,
568 lu->tgt->management_agent_address);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500569
Jarod Wilsona4c379c2008-01-19 13:15:05 +0100570 wait_for_completion_timeout(&orb->done, msecs_to_jiffies(timeout));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500571
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500572 retval = -EIO;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200573 if (sbp2_cancel_orbs(lu) == 0) {
Stefan Richter48f18c72008-02-03 23:09:50 +0100574 fw_error("%s: orb reply timed out, rcode=0x%02x\n",
575 lu->tgt->bus_id, orb->base.rcode);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500576 goto out;
577 }
578
Kristian Høgsberg2aaad972007-03-07 12:12:47 -0500579 if (orb->base.rcode != RCODE_COMPLETE) {
Stefan Richter48f18c72008-02-03 23:09:50 +0100580 fw_error("%s: management write failed, rcode 0x%02x\n",
581 lu->tgt->bus_id, orb->base.rcode);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500582 goto out;
583 }
584
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400585 if (STATUS_GET_RESPONSE(orb->status) != 0 ||
586 STATUS_GET_SBP_STATUS(orb->status) != 0) {
Stefan Richter48f18c72008-02-03 23:09:50 +0100587 fw_error("%s: error status: %d:%d\n", lu->tgt->bus_id,
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400588 STATUS_GET_RESPONSE(orb->status),
589 STATUS_GET_SBP_STATUS(orb->status));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500590 goto out;
591 }
592
593 retval = 0;
594 out:
595 dma_unmap_single(device->card->device, orb->base.request_bus,
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400596 sizeof(orb->request), DMA_TO_DEVICE);
Stefan Richter7aa48482007-07-02 21:04:44 +0200597 fail_mapping_request:
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500598 dma_unmap_single(device->card->device, orb->response_bus,
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400599 sizeof(orb->response), DMA_FROM_DEVICE);
Stefan Richter7aa48482007-07-02 21:04:44 +0200600 fail_mapping_response:
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500601 if (response)
Stefan Richter71ee9f02008-02-28 20:51:11 +0100602 memcpy(response, orb->response, sizeof(orb->response));
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400603 kref_put(&orb->base.kref, free_orb);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500604
605 return retval;
606}
607
608static void
609complete_agent_reset_write(struct fw_card *card, int rcode,
Stefan Richtere0e60212008-02-03 23:08:58 +0100610 void *payload, size_t length, void *done)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500611{
Stefan Richtere0e60212008-02-03 23:08:58 +0100612 complete(done);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500613}
614
Stefan Richtere0e60212008-02-03 23:08:58 +0100615static void sbp2_agent_reset(struct sbp2_logical_unit *lu)
616{
617 struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
618 DECLARE_COMPLETION_ONSTACK(done);
619 struct fw_transaction t;
620 static u32 z;
621
622 fw_send_request(device->card, &t, TCODE_WRITE_QUADLET_REQUEST,
623 lu->tgt->node_id, lu->generation, device->max_speed,
624 lu->command_block_agent_address + SBP2_AGENT_RESET,
625 &z, sizeof(z), complete_agent_reset_write, &done);
626 wait_for_completion(&done);
627}
628
629static void
630complete_agent_reset_write_no_wait(struct fw_card *card, int rcode,
631 void *payload, size_t length, void *data)
632{
633 kfree(data);
634}
635
636static void sbp2_agent_reset_no_wait(struct sbp2_logical_unit *lu)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500637{
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200638 struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500639 struct fw_transaction *t;
Stefan Richtere0e60212008-02-03 23:08:58 +0100640 static u32 z;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500641
Stefan Richtere0e60212008-02-03 23:08:58 +0100642 t = kmalloc(sizeof(*t), GFP_ATOMIC);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500643 if (t == NULL)
Stefan Richtere0e60212008-02-03 23:08:58 +0100644 return;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500645
646 fw_send_request(device->card, t, TCODE_WRITE_QUADLET_REQUEST,
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200647 lu->tgt->node_id, lu->generation, device->max_speed,
648 lu->command_block_agent_address + SBP2_AGENT_RESET,
Stefan Richtere0e60212008-02-03 23:08:58 +0100649 &z, sizeof(z), complete_agent_reset_write_no_wait, t);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500650}
651
Stefan Richter2e2705b2008-02-16 16:37:28 +0100652static void sbp2_set_generation(struct sbp2_logical_unit *lu, int generation)
653{
654 struct fw_card *card = fw_device(lu->tgt->unit->device.parent)->card;
655 unsigned long flags;
656
657 /* serialize with comparisons of lu->generation and card->generation */
658 spin_lock_irqsave(&card->lock, flags);
659 lu->generation = generation;
660 spin_unlock_irqrestore(&card->lock, flags);
661}
662
663static inline void sbp2_allow_block(struct sbp2_logical_unit *lu)
664{
665 /*
666 * We may access dont_block without taking card->lock here:
667 * All callers of sbp2_allow_block() and all callers of sbp2_unblock()
668 * are currently serialized against each other.
669 * And a wrong result in sbp2_conditionally_block()'s access of
670 * dont_block is rather harmless, it simply misses its first chance.
671 */
672 --lu->tgt->dont_block;
673}
674
675/*
676 * Blocks lu->tgt if all of the following conditions are met:
677 * - Login, INQUIRY, and high-level SCSI setup of all of the target's
678 * logical units have been finished (indicated by dont_block == 0).
679 * - lu->generation is stale.
680 *
681 * Note, scsi_block_requests() must be called while holding card->lock,
682 * otherwise it might foil sbp2_[conditionally_]unblock()'s attempt to
683 * unblock the target.
684 */
685static void sbp2_conditionally_block(struct sbp2_logical_unit *lu)
686{
687 struct sbp2_target *tgt = lu->tgt;
688 struct fw_card *card = fw_device(tgt->unit->device.parent)->card;
689 struct Scsi_Host *shost =
690 container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
691 unsigned long flags;
692
693 spin_lock_irqsave(&card->lock, flags);
694 if (!tgt->dont_block && !lu->blocked &&
695 lu->generation != card->generation) {
696 lu->blocked = true;
Stefan Richtera5fd9ec2008-02-28 20:53:45 +0100697 if (++tgt->blocked == 1)
Stefan Richter2e2705b2008-02-16 16:37:28 +0100698 scsi_block_requests(shost);
Stefan Richter2e2705b2008-02-16 16:37:28 +0100699 }
700 spin_unlock_irqrestore(&card->lock, flags);
701}
702
703/*
704 * Unblocks lu->tgt as soon as all its logical units can be unblocked.
705 * Note, it is harmless to run scsi_unblock_requests() outside the
706 * card->lock protected section. On the other hand, running it inside
707 * the section might clash with shost->host_lock.
708 */
709static void sbp2_conditionally_unblock(struct sbp2_logical_unit *lu)
710{
711 struct sbp2_target *tgt = lu->tgt;
712 struct fw_card *card = fw_device(tgt->unit->device.parent)->card;
713 struct Scsi_Host *shost =
714 container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
715 unsigned long flags;
716 bool unblock = false;
717
718 spin_lock_irqsave(&card->lock, flags);
719 if (lu->blocked && lu->generation == card->generation) {
720 lu->blocked = false;
721 unblock = --tgt->blocked == 0;
722 }
723 spin_unlock_irqrestore(&card->lock, flags);
724
Stefan Richtera5fd9ec2008-02-28 20:53:45 +0100725 if (unblock)
Stefan Richter2e2705b2008-02-16 16:37:28 +0100726 scsi_unblock_requests(shost);
Stefan Richter2e2705b2008-02-16 16:37:28 +0100727}
728
729/*
730 * Prevents future blocking of tgt and unblocks it.
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_unblock(struct sbp2_target *tgt)
736{
737 struct fw_card *card = fw_device(tgt->unit->device.parent)->card;
738 struct Scsi_Host *shost =
739 container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
740 unsigned long flags;
741
742 spin_lock_irqsave(&card->lock, flags);
743 ++tgt->dont_block;
744 spin_unlock_irqrestore(&card->lock, flags);
745
746 scsi_unblock_requests(shost);
747}
748
Stefan Richterf8436152008-02-26 23:30:02 +0100749static int sbp2_lun2int(u16 lun)
750{
751 struct scsi_lun eight_bytes_lun;
752
753 memset(&eight_bytes_lun, 0, sizeof(eight_bytes_lun));
754 eight_bytes_lun.scsi_lun[0] = (lun >> 8) & 0xff;
755 eight_bytes_lun.scsi_lun[1] = lun & 0xff;
756
757 return scsilun_to_int(&eight_bytes_lun);
758}
759
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200760static void sbp2_release_target(struct kref *kref)
Kristian Høgsbergb3d6e152007-03-14 17:34:58 -0400761{
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200762 struct sbp2_target *tgt = container_of(kref, struct sbp2_target, kref);
763 struct sbp2_logical_unit *lu, *next;
764 struct Scsi_Host *shost =
765 container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
Stefan Richterf8436152008-02-26 23:30:02 +0100766 struct scsi_device *sdev;
Stefan Richter855c6032008-02-27 22:14:27 +0100767 struct fw_device *device = fw_device(tgt->unit->device.parent);
Kristian Høgsbergb3d6e152007-03-14 17:34:58 -0400768
Stefan Richter2e2705b2008-02-16 16:37:28 +0100769 /* prevent deadlocks */
770 sbp2_unblock(tgt);
771
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200772 list_for_each_entry_safe(lu, next, &tgt->lu_list, link) {
Stefan Richterf8436152008-02-26 23:30:02 +0100773 sdev = scsi_device_lookup(shost, 0, 0, sbp2_lun2int(lu->lun));
774 if (sdev) {
775 scsi_remove_device(sdev);
776 scsi_device_put(sdev);
Stefan Richter33f1c6c2008-02-19 09:05:49 +0100777 }
Stefan Richterbe6f48b2008-01-27 19:14:44 +0100778 sbp2_send_management_orb(lu, tgt->node_id, lu->generation,
779 SBP2_LOGOUT_REQUEST, lu->login_id, NULL);
Stefan Richter4dccd022008-01-20 01:24:26 +0100780
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200781 fw_core_remove_address_handler(&lu->address_handler);
782 list_del(&lu->link);
783 kfree(lu);
784 }
785 scsi_remove_host(shost);
Stefan Richter48f18c72008-02-03 23:09:50 +0100786 fw_notify("released %s\n", tgt->bus_id);
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200787
Stefan Richter1dc3bea2008-02-24 19:01:21 +0100788 fw_unit_put(tgt->unit);
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200789 scsi_host_put(shost);
Stefan Richter855c6032008-02-27 22:14:27 +0100790 fw_device_put(device);
Kristian Høgsbergb3d6e152007-03-14 17:34:58 -0400791}
792
Stefan Richterdf8ec242007-08-12 12:51:18 +0200793static struct workqueue_struct *sbp2_wq;
794
Stefan Richter285838e2007-11-07 01:12:51 +0100795/*
796 * Always get the target's kref when scheduling work on one its units.
797 * Each workqueue job is responsible to call sbp2_target_put() upon return.
798 */
799static void sbp2_queue_work(struct sbp2_logical_unit *lu, unsigned long delay)
800{
801 if (queue_delayed_work(sbp2_wq, &lu->work, delay))
802 kref_get(&lu->tgt->kref);
803}
804
805static void sbp2_target_put(struct sbp2_target *tgt)
806{
807 kref_put(&tgt->kref, sbp2_release_target);
808}
809
Jarod Wilson51f9dbe2008-03-07 01:43:01 -0500810static void
811complete_set_busy_timeout(struct fw_card *card, int rcode,
812 void *payload, size_t length, void *done)
813{
814 complete(done);
815}
816
Jarod Wilson17cff9f2008-03-07 01:43:31 -0500817/*
818 * Write retransmit retry values into the BUSY_TIMEOUT register.
819 * - The single-phase retry protocol is supported by all SBP-2 devices, but the
820 * default retry_limit value is 0 (i.e. never retry transmission). We write a
821 * saner value after logging into the device.
822 * - The dual-phase retry protocol is optional to implement, and if not
823 * supported, writes to the dual-phase portion of the register will be
824 * ignored. We try to write the original 1394-1995 default here.
825 * - In the case of devices that are also SBP-3-compliant, all writes are
826 * ignored, as the register is read-only, but contains single-phase retry of
827 * 15, which is what we're trying to set for all SBP-2 device anyway, so this
828 * write attempt is safe and yields more consistent behavior for all devices.
829 *
830 * See section 8.3.2.3.5 of the 1394-1995 spec, section 6.2 of the SBP-2 spec,
831 * and section 6.4 of the SBP-3 spec for further details.
832 */
Jarod Wilson51f9dbe2008-03-07 01:43:01 -0500833static void sbp2_set_busy_timeout(struct sbp2_logical_unit *lu)
834{
835 struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
836 DECLARE_COMPLETION_ONSTACK(done);
837 struct fw_transaction t;
838 static __be32 busy_timeout;
839
Jarod Wilson17cff9f2008-03-07 01:43:31 -0500840 busy_timeout = cpu_to_be32(SBP2_CYCLE_LIMIT | SBP2_RETRY_LIMIT);
Jarod Wilson51f9dbe2008-03-07 01:43:01 -0500841
842 fw_send_request(device->card, &t, TCODE_WRITE_QUADLET_REQUEST,
843 lu->tgt->node_id, lu->generation, device->max_speed,
844 CSR_REGISTER_BASE + CSR_BUSY_TIMEOUT, &busy_timeout,
845 sizeof(busy_timeout), complete_set_busy_timeout, &done);
846 wait_for_completion(&done);
847}
848
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200849static void sbp2_reconnect(struct work_struct *work);
850
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500851static void sbp2_login(struct work_struct *work)
852{
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200853 struct sbp2_logical_unit *lu =
854 container_of(work, struct sbp2_logical_unit, work.work);
Stefan Richter48f18c72008-02-03 23:09:50 +0100855 struct sbp2_target *tgt = lu->tgt;
856 struct fw_device *device = fw_device(tgt->unit->device.parent);
857 struct Scsi_Host *shost;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200858 struct scsi_device *sdev;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500859 struct sbp2_login_response response;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200860 int generation, node_id, local_node_id;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500861
Stefan Richterbe6f48b2008-01-27 19:14:44 +0100862 if (fw_device_is_shutdown(device))
863 goto out;
864
Stefan Richter5a8a1bc2008-01-24 01:53:19 +0100865 generation = device->generation;
Stefan Richterb5d2a5e2008-01-25 18:57:41 +0100866 smp_rmb(); /* node_id must not be older than generation */
Stefan Richter5a8a1bc2008-01-24 01:53:19 +0100867 node_id = device->node_id;
868 local_node_id = device->card->node_id;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500869
Stefan Richterce896d92008-02-03 23:11:39 +0100870 /* If this is a re-login attempt, log out, or we might be rejected. */
Stefan Richterf8436152008-02-26 23:30:02 +0100871 if (lu->has_sdev)
Stefan Richterce896d92008-02-03 23:11:39 +0100872 sbp2_send_management_orb(lu, device->node_id, generation,
873 SBP2_LOGOUT_REQUEST, lu->login_id, NULL);
874
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200875 if (sbp2_send_management_orb(lu, node_id, generation,
876 SBP2_LOGIN_REQUEST, lu->lun, &response) < 0) {
Stefan Richter2e2705b2008-02-16 16:37:28 +0100877 if (lu->retries++ < 5) {
Stefan Richter285838e2007-11-07 01:12:51 +0100878 sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5));
Stefan Richter2e2705b2008-02-16 16:37:28 +0100879 } else {
Stefan Richter48f18c72008-02-03 23:09:50 +0100880 fw_error("%s: failed to login to LUN %04x\n",
881 tgt->bus_id, lu->lun);
Stefan Richter2e2705b2008-02-16 16:37:28 +0100882 /* Let any waiting I/O fail from now on. */
883 sbp2_unblock(lu->tgt);
884 }
Stefan Richter285838e2007-11-07 01:12:51 +0100885 goto out;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500886 }
887
Stefan Richter48f18c72008-02-03 23:09:50 +0100888 tgt->node_id = node_id;
889 tgt->address_high = local_node_id << 16;
Stefan Richter2e2705b2008-02-16 16:37:28 +0100890 sbp2_set_generation(lu, generation);
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500891
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200892 lu->command_block_agent_address =
Stefan Richter71ee9f02008-02-28 20:51:11 +0100893 ((u64)(be32_to_cpu(response.command_block_agent.high) & 0xffff)
894 << 32) | be32_to_cpu(response.command_block_agent.low);
895 lu->login_id = be32_to_cpu(response.misc) & 0xffff;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500896
Stefan Richter48f18c72008-02-03 23:09:50 +0100897 fw_notify("%s: logged in to LUN %04x (%d retries)\n",
898 tgt->bus_id, lu->lun, lu->retries);
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500899
Jarod Wilson51f9dbe2008-03-07 01:43:01 -0500900 /* set appropriate retry limit(s) in BUSY_TIMEOUT register */
901 sbp2_set_busy_timeout(lu);
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500902
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200903 PREPARE_DELAYED_WORK(&lu->work, sbp2_reconnect);
904 sbp2_agent_reset(lu);
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500905
Stefan Richter0fa6dfd2008-02-03 23:10:47 +0100906 /* This was a re-login. */
Stefan Richterf8436152008-02-26 23:30:02 +0100907 if (lu->has_sdev) {
Stefan Richter0fa6dfd2008-02-03 23:10:47 +0100908 sbp2_cancel_orbs(lu);
Stefan Richter2e2705b2008-02-16 16:37:28 +0100909 sbp2_conditionally_unblock(lu);
Stefan Richter0fa6dfd2008-02-03 23:10:47 +0100910 goto out;
911 }
912
Stefan Richter9220f192008-02-03 23:04:38 +0100913 if (lu->tgt->workarounds & SBP2_WORKAROUND_DELAY_INQUIRY)
914 ssleep(SBP2_INQUIRY_DELAY);
915
Stefan Richter48f18c72008-02-03 23:09:50 +0100916 shost = container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
Stefan Richterf8436152008-02-26 23:30:02 +0100917 sdev = __scsi_add_device(shost, 0, 0, sbp2_lun2int(lu->lun), lu);
Stefan Richtere80de372008-02-15 21:29:02 +0100918 /*
919 * FIXME: We are unable to perform reconnects while in sbp2_login().
920 * Therefore __scsi_add_device() will get into trouble if a bus reset
921 * happens in parallel. It will either fail or leave us with an
922 * unusable sdev. As a workaround we check for this and retry the
923 * whole login and SCSI probing.
924 */
Stefan Richter1b9c12b2008-01-26 17:43:23 +0100925
Stefan Richtere80de372008-02-15 21:29:02 +0100926 /* Reported error during __scsi_add_device() */
927 if (IS_ERR(sdev))
928 goto out_logout_login;
929
Stefan Richtere80de372008-02-15 21:29:02 +0100930 /* Unreported error during __scsi_add_device() */
931 smp_rmb(); /* get current card generation */
932 if (generation != device->card->generation) {
933 scsi_remove_device(sdev);
Stefan Richter33f1c6c2008-02-19 09:05:49 +0100934 scsi_device_put(sdev);
Stefan Richtere80de372008-02-15 21:29:02 +0100935 goto out_logout_login;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500936 }
Stefan Richtere80de372008-02-15 21:29:02 +0100937
938 /* No error during __scsi_add_device() */
Stefan Richterf8436152008-02-26 23:30:02 +0100939 lu->has_sdev = true;
940 scsi_device_put(sdev);
Stefan Richter2e2705b2008-02-16 16:37:28 +0100941 sbp2_allow_block(lu);
Stefan Richtere80de372008-02-15 21:29:02 +0100942 goto out;
943
944 out_logout_login:
945 smp_rmb(); /* generation may have changed */
946 generation = device->generation;
947 smp_rmb(); /* node_id must not be older than generation */
948
949 sbp2_send_management_orb(lu, device->node_id, generation,
950 SBP2_LOGOUT_REQUEST, lu->login_id, NULL);
951 /*
952 * If a bus reset happened, sbp2_update will have requeued
953 * lu->work already. Reset the work from reconnect to login.
954 */
955 PREPARE_DELAYED_WORK(&lu->work, sbp2_login);
Stefan Richter285838e2007-11-07 01:12:51 +0100956 out:
Stefan Richter48f18c72008-02-03 23:09:50 +0100957 sbp2_target_put(tgt);
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500958}
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500959
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200960static int sbp2_add_logical_unit(struct sbp2_target *tgt, int lun_entry)
961{
962 struct sbp2_logical_unit *lu;
963
964 lu = kmalloc(sizeof(*lu), GFP_KERNEL);
965 if (!lu)
966 return -ENOMEM;
967
968 lu->address_handler.length = 0x100;
969 lu->address_handler.address_callback = sbp2_status_write;
970 lu->address_handler.callback_data = lu;
971
972 if (fw_core_add_address_handler(&lu->address_handler,
973 &fw_high_memory_region) < 0) {
974 kfree(lu);
975 return -ENOMEM;
976 }
977
Stefan Richterf8436152008-02-26 23:30:02 +0100978 lu->tgt = tgt;
979 lu->lun = lun_entry & 0xffff;
980 lu->retries = 0;
981 lu->has_sdev = false;
982 lu->blocked = false;
Stefan Richter2e2705b2008-02-16 16:37:28 +0100983 ++tgt->dont_block;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200984 INIT_LIST_HEAD(&lu->orb_list);
985 INIT_DELAYED_WORK(&lu->work, sbp2_login);
986
987 list_add_tail(&lu->link, &tgt->lu_list);
988 return 0;
989}
990
991static int sbp2_scan_logical_unit_dir(struct sbp2_target *tgt, u32 *directory)
992{
993 struct fw_csr_iterator ci;
994 int key, value;
995
996 fw_csr_iterator_init(&ci, directory);
997 while (fw_csr_iterator_next(&ci, &key, &value))
998 if (key == SBP2_CSR_LOGICAL_UNIT_NUMBER &&
999 sbp2_add_logical_unit(tgt, value) < 0)
1000 return -ENOMEM;
1001 return 0;
1002}
1003
1004static int sbp2_scan_unit_dir(struct sbp2_target *tgt, u32 *directory,
1005 u32 *model, u32 *firmware_revision)
1006{
1007 struct fw_csr_iterator ci;
1008 int key, value;
Jarod Wilson384170d2008-01-25 23:31:12 -05001009 unsigned int timeout;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001010
1011 fw_csr_iterator_init(&ci, directory);
1012 while (fw_csr_iterator_next(&ci, &key, &value)) {
1013 switch (key) {
1014
1015 case CSR_DEPENDENT_INFO | CSR_OFFSET:
1016 tgt->management_agent_address =
1017 CSR_REGISTER_BASE + 4 * value;
1018 break;
1019
1020 case CSR_DIRECTORY_ID:
1021 tgt->directory_id = value;
1022 break;
1023
1024 case CSR_MODEL:
1025 *model = value;
1026 break;
1027
1028 case SBP2_CSR_FIRMWARE_REVISION:
1029 *firmware_revision = value;
1030 break;
1031
Jarod Wilson384170d2008-01-25 23:31:12 -05001032 case SBP2_CSR_UNIT_CHARACTERISTICS:
1033 /* the timeout value is stored in 500ms units */
1034 timeout = ((unsigned int) value >> 8 & 0xff) * 500;
1035 timeout = max(timeout, SBP2_MIN_LOGIN_ORB_TIMEOUT);
1036 tgt->mgt_orb_timeout =
1037 min(timeout, SBP2_MAX_LOGIN_ORB_TIMEOUT);
1038
1039 if (timeout > tgt->mgt_orb_timeout)
1040 fw_notify("%s: config rom contains %ds "
1041 "management ORB timeout, limiting "
Stefan Richter48f18c72008-02-03 23:09:50 +01001042 "to %ds\n", tgt->bus_id,
Jarod Wilson384170d2008-01-25 23:31:12 -05001043 timeout / 1000,
1044 tgt->mgt_orb_timeout / 1000);
1045 break;
1046
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001047 case SBP2_CSR_LOGICAL_UNIT_NUMBER:
1048 if (sbp2_add_logical_unit(tgt, value) < 0)
1049 return -ENOMEM;
1050 break;
1051
1052 case SBP2_CSR_LOGICAL_UNIT_DIRECTORY:
1053 if (sbp2_scan_logical_unit_dir(tgt, ci.p + value) < 0)
1054 return -ENOMEM;
1055 break;
1056 }
1057 }
1058 return 0;
1059}
1060
1061static void sbp2_init_workarounds(struct sbp2_target *tgt, u32 model,
1062 u32 firmware_revision)
1063{
1064 int i;
Stefan Richter05cca732008-01-26 17:42:45 +01001065 unsigned int w = sbp2_param_workarounds;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001066
Stefan Richter2df222b2007-08-13 17:48:25 +02001067 if (w)
1068 fw_notify("Please notify linux1394-devel@lists.sourceforge.net "
1069 "if you need the workarounds parameter for %s\n",
Stefan Richter48f18c72008-02-03 23:09:50 +01001070 tgt->bus_id);
Stefan Richter2df222b2007-08-13 17:48:25 +02001071
1072 if (w & SBP2_WORKAROUND_OVERRIDE)
1073 goto out;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001074
1075 for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) {
1076
1077 if (sbp2_workarounds_table[i].firmware_revision !=
1078 (firmware_revision & 0xffffff00))
1079 continue;
1080
1081 if (sbp2_workarounds_table[i].model != model &&
1082 sbp2_workarounds_table[i].model != ~0)
1083 continue;
1084
Stefan Richter2df222b2007-08-13 17:48:25 +02001085 w |= sbp2_workarounds_table[i].workarounds;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001086 break;
1087 }
Stefan Richter2df222b2007-08-13 17:48:25 +02001088 out:
1089 if (w)
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001090 fw_notify("Workarounds for %s: 0x%x "
1091 "(firmware_revision 0x%06x, model_id 0x%06x)\n",
Stefan Richter48f18c72008-02-03 23:09:50 +01001092 tgt->bus_id, w, firmware_revision, model);
Stefan Richter2df222b2007-08-13 17:48:25 +02001093 tgt->workarounds = w;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001094}
1095
1096static struct scsi_host_template scsi_driver_template;
1097
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001098static int sbp2_probe(struct device *dev)
1099{
1100 struct fw_unit *unit = fw_unit(dev);
1101 struct fw_device *device = fw_device(unit->device.parent);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001102 struct sbp2_target *tgt;
1103 struct sbp2_logical_unit *lu;
1104 struct Scsi_Host *shost;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001105 u32 model, firmware_revision;
1106
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001107 shost = scsi_host_alloc(&scsi_driver_template, sizeof(*tgt));
1108 if (shost == NULL)
1109 return -ENOMEM;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001110
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001111 tgt = (struct sbp2_target *)shost->hostdata;
1112 unit->device.driver_data = tgt;
1113 tgt->unit = unit;
1114 kref_init(&tgt->kref);
1115 INIT_LIST_HEAD(&tgt->lu_list);
Stefan Richter48f18c72008-02-03 23:09:50 +01001116 tgt->bus_id = unit->device.bus_id;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001117
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001118 if (fw_device_enable_phys_dma(device) < 0)
1119 goto fail_shost_put;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001120
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001121 if (scsi_add_host(shost, &unit->device) < 0)
1122 goto fail_shost_put;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001123
Stefan Richter855c6032008-02-27 22:14:27 +01001124 fw_device_get(device);
Stefan Richter1dc3bea2008-02-24 19:01:21 +01001125 fw_unit_get(unit);
Stefan Richter855c6032008-02-27 22:14:27 +01001126
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001127 /* Initialize to values that won't match anything in our table. */
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001128 firmware_revision = 0xff000000;
1129 model = 0xff000000;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001130
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001131 /* implicit directory ID */
1132 tgt->directory_id = ((unit->directory - device->config_rom) * 4
1133 + CSR_CONFIG_ROM) & 0xffffff;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001134
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001135 if (sbp2_scan_unit_dir(tgt, unit->directory, &model,
1136 &firmware_revision) < 0)
1137 goto fail_tgt_put;
1138
1139 sbp2_init_workarounds(tgt, model, firmware_revision);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001140
Stefan Richter285838e2007-11-07 01:12:51 +01001141 /* Do the login in a workqueue so we can easily reschedule retries. */
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001142 list_for_each_entry(lu, &tgt->lu_list, link)
Stefan Richter285838e2007-11-07 01:12:51 +01001143 sbp2_queue_work(lu, 0);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001144 return 0;
Kristian Høgsbergad852742007-05-09 19:23:07 -04001145
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001146 fail_tgt_put:
Stefan Richter285838e2007-11-07 01:12:51 +01001147 sbp2_target_put(tgt);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001148 return -ENOMEM;
1149
1150 fail_shost_put:
1151 scsi_host_put(shost);
1152 return -ENOMEM;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001153}
1154
1155static int sbp2_remove(struct device *dev)
1156{
1157 struct fw_unit *unit = fw_unit(dev);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001158 struct sbp2_target *tgt = unit->device.driver_data;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001159
Stefan Richter285838e2007-11-07 01:12:51 +01001160 sbp2_target_put(tgt);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001161 return 0;
1162}
1163
1164static void sbp2_reconnect(struct work_struct *work)
1165{
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001166 struct sbp2_logical_unit *lu =
1167 container_of(work, struct sbp2_logical_unit, work.work);
Stefan Richter48f18c72008-02-03 23:09:50 +01001168 struct sbp2_target *tgt = lu->tgt;
1169 struct fw_device *device = fw_device(tgt->unit->device.parent);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001170 int generation, node_id, local_node_id;
1171
Stefan Richterbe6f48b2008-01-27 19:14:44 +01001172 if (fw_device_is_shutdown(device))
1173 goto out;
1174
Stefan Richter5a8a1bc2008-01-24 01:53:19 +01001175 generation = device->generation;
Stefan Richterb5d2a5e2008-01-25 18:57:41 +01001176 smp_rmb(); /* node_id must not be older than generation */
Stefan Richter5a8a1bc2008-01-24 01:53:19 +01001177 node_id = device->node_id;
1178 local_node_id = device->card->node_id;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001179
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001180 if (sbp2_send_management_orb(lu, node_id, generation,
Kristian Høgsberg7f37c422007-02-06 14:49:34 -05001181 SBP2_RECONNECT_REQUEST,
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001182 lu->login_id, NULL) < 0) {
Stefan Richterce896d92008-02-03 23:11:39 +01001183 /*
1184 * If reconnect was impossible even though we are in the
1185 * current generation, fall back and try to log in again.
1186 *
1187 * We could check for "Function rejected" status, but
1188 * looking at the bus generation as simpler and more general.
1189 */
1190 smp_rmb(); /* get current card generation */
1191 if (generation == device->card->generation ||
1192 lu->retries++ >= 5) {
Stefan Richter48f18c72008-02-03 23:09:50 +01001193 fw_error("%s: failed to reconnect\n", tgt->bus_id);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001194 lu->retries = 0;
1195 PREPARE_DELAYED_WORK(&lu->work, sbp2_login);
Kristian Høgsberg7f37c422007-02-06 14:49:34 -05001196 }
Stefan Richter285838e2007-11-07 01:12:51 +01001197 sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5));
1198 goto out;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -05001199 }
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001200
Stefan Richter48f18c72008-02-03 23:09:50 +01001201 tgt->node_id = node_id;
1202 tgt->address_high = local_node_id << 16;
Stefan Richter2e2705b2008-02-16 16:37:28 +01001203 sbp2_set_generation(lu, generation);
Kristian Høgsberg7f37c422007-02-06 14:49:34 -05001204
Stefan Richter48f18c72008-02-03 23:09:50 +01001205 fw_notify("%s: reconnected to LUN %04x (%d retries)\n",
1206 tgt->bus_id, lu->lun, lu->retries);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001207
1208 sbp2_agent_reset(lu);
1209 sbp2_cancel_orbs(lu);
Stefan Richter2e2705b2008-02-16 16:37:28 +01001210 sbp2_conditionally_unblock(lu);
Stefan Richter285838e2007-11-07 01:12:51 +01001211 out:
Stefan Richter48f18c72008-02-03 23:09:50 +01001212 sbp2_target_put(tgt);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001213}
1214
1215static void sbp2_update(struct fw_unit *unit)
1216{
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001217 struct sbp2_target *tgt = unit->device.driver_data;
1218 struct sbp2_logical_unit *lu;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001219
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001220 fw_device_enable_phys_dma(fw_device(unit->device.parent));
1221
1222 /*
1223 * Fw-core serializes sbp2_update() against sbp2_remove().
1224 * Iteration over tgt->lu_list is therefore safe here.
1225 */
1226 list_for_each_entry(lu, &tgt->lu_list, link) {
Stefan Richter2e2705b2008-02-16 16:37:28 +01001227 sbp2_conditionally_block(lu);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001228 lu->retries = 0;
Stefan Richter285838e2007-11-07 01:12:51 +01001229 sbp2_queue_work(lu, 0);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001230 }
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001231}
1232
1233#define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e
1234#define SBP2_SW_VERSION_ENTRY 0x00010483
1235
Stefan Richter21ebcd12007-01-14 15:29:07 +01001236static const struct fw_device_id sbp2_id_table[] = {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001237 {
1238 .match_flags = FW_MATCH_SPECIFIER_ID | FW_MATCH_VERSION,
1239 .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY,
Stefan Richter5af4e5e2007-01-21 20:45:32 +01001240 .version = SBP2_SW_VERSION_ENTRY,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001241 },
1242 { }
1243};
1244
1245static struct fw_driver sbp2_driver = {
1246 .driver = {
1247 .owner = THIS_MODULE,
1248 .name = sbp2_driver_name,
1249 .bus = &fw_bus_type,
1250 .probe = sbp2_probe,
1251 .remove = sbp2_remove,
1252 },
1253 .update = sbp2_update,
1254 .id_table = sbp2_id_table,
1255};
1256
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001257static unsigned int
1258sbp2_status_to_sense_data(u8 *sbp2_status, u8 *sense_data)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001259{
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001260 int sam_status;
1261
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001262 sense_data[0] = 0x70;
1263 sense_data[1] = 0x0;
1264 sense_data[2] = sbp2_status[1];
1265 sense_data[3] = sbp2_status[4];
1266 sense_data[4] = sbp2_status[5];
1267 sense_data[5] = sbp2_status[6];
1268 sense_data[6] = sbp2_status[7];
1269 sense_data[7] = 10;
1270 sense_data[8] = sbp2_status[8];
1271 sense_data[9] = sbp2_status[9];
1272 sense_data[10] = sbp2_status[10];
1273 sense_data[11] = sbp2_status[11];
1274 sense_data[12] = sbp2_status[2];
1275 sense_data[13] = sbp2_status[3];
1276 sense_data[14] = sbp2_status[12];
1277 sense_data[15] = sbp2_status[13];
1278
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001279 sam_status = sbp2_status[0] & 0x3f;
1280
1281 switch (sam_status) {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001282 case SAM_STAT_GOOD:
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001283 case SAM_STAT_CHECK_CONDITION:
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001284 case SAM_STAT_CONDITION_MET:
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001285 case SAM_STAT_BUSY:
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001286 case SAM_STAT_RESERVATION_CONFLICT:
1287 case SAM_STAT_COMMAND_TERMINATED:
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001288 return DID_OK << 16 | sam_status;
1289
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001290 default:
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001291 return DID_ERROR << 16;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001292 }
1293}
1294
1295static void
1296complete_command_orb(struct sbp2_orb *base_orb, struct sbp2_status *status)
1297{
Jay Fenlason6f061482007-06-27 16:04:33 -04001298 struct sbp2_command_orb *orb =
1299 container_of(base_orb, struct sbp2_command_orb, base);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001300 struct fw_device *device = fw_device(orb->lu->tgt->unit->device.parent);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001301 int result;
1302
1303 if (status != NULL) {
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001304 if (STATUS_GET_DEAD(*status))
Stefan Richtere0e60212008-02-03 23:08:58 +01001305 sbp2_agent_reset_no_wait(orb->lu);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001306
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001307 switch (STATUS_GET_RESPONSE(*status)) {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001308 case SBP2_STATUS_REQUEST_COMPLETE:
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001309 result = DID_OK << 16;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001310 break;
1311 case SBP2_STATUS_TRANSPORT_FAILURE:
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001312 result = DID_BUS_BUSY << 16;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001313 break;
1314 case SBP2_STATUS_ILLEGAL_REQUEST:
1315 case SBP2_STATUS_VENDOR_DEPENDENT:
1316 default:
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001317 result = DID_ERROR << 16;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001318 break;
1319 }
1320
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001321 if (result == DID_OK << 16 && STATUS_GET_LEN(*status) > 1)
1322 result = sbp2_status_to_sense_data(STATUS_GET_DATA(*status),
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001323 orb->cmd->sense_buffer);
1324 } else {
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001325 /*
1326 * If the orb completes with status == NULL, something
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001327 * went wrong, typically a bus reset happened mid-orb
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001328 * or when sending the write (less likely).
1329 */
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001330 result = DID_BUS_BUSY << 16;
Stefan Richter2e2705b2008-02-16 16:37:28 +01001331 sbp2_conditionally_block(orb->lu);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001332 }
1333
1334 dma_unmap_single(device->card->device, orb->base.request_bus,
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -04001335 sizeof(orb->request), DMA_TO_DEVICE);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001336
Stefan Richter412edf62007-07-16 21:05:41 +02001337 if (scsi_sg_count(orb->cmd) > 0)
1338 dma_unmap_sg(device->card->device, scsi_sglist(orb->cmd),
1339 scsi_sg_count(orb->cmd),
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001340 orb->cmd->sc_data_direction);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001341
1342 if (orb->page_table_bus != 0)
1343 dma_unmap_single(device->card->device, orb->page_table_bus,
Stefan Richterb4be0162007-07-02 22:07:34 +02001344 sizeof(orb->page_table), DMA_TO_DEVICE);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001345
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001346 orb->cmd->result = result;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001347 orb->done(orb->cmd);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001348}
1349
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001350static int
1351sbp2_map_scatterlist(struct sbp2_command_orb *orb, struct fw_device *device,
1352 struct sbp2_logical_unit *lu)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001353{
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001354 struct scatterlist *sg;
1355 int sg_len, l, i, j, count;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001356 dma_addr_t sg_addr;
1357
Stefan Richter412edf62007-07-16 21:05:41 +02001358 sg = scsi_sglist(orb->cmd);
1359 count = dma_map_sg(device->card->device, sg, scsi_sg_count(orb->cmd),
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001360 orb->cmd->sc_data_direction);
Kristian Høgsberg95ffc5e2007-05-09 19:23:08 -04001361 if (count == 0)
1362 goto fail;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001363
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001364 /*
1365 * Handle the special case where there is only one element in
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001366 * the scatter list by converting it to an immediate block
1367 * request. This is also a workaround for broken devices such
1368 * as the second generation iPod which doesn't support page
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001369 * tables.
1370 */
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001371 if (count == 1 && sg_dma_len(sg) < SBP2_MAX_SG_ELEMENT_LENGTH) {
Stefan Richter71ee9f02008-02-28 20:51:11 +01001372 orb->request.data_descriptor.high =
1373 cpu_to_be32(lu->tgt->address_high);
1374 orb->request.data_descriptor.low =
1375 cpu_to_be32(sg_dma_address(sg));
1376 orb->request.misc |=
1377 cpu_to_be32(COMMAND_ORB_DATA_SIZE(sg_dma_len(sg)));
Kristian Høgsberg95ffc5e2007-05-09 19:23:08 -04001378 return 0;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001379 }
1380
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001381 /*
1382 * Convert the scatterlist to an sbp2 page table. If any
Kristian Høgsberg, Stefan Richter36abb3b2007-05-09 19:23:10 -04001383 * scatterlist entries are too big for sbp2, we split them as we
1384 * go. Even if we ask the block I/O layer to not give us sg
1385 * elements larger than 65535 bytes, some IOMMUs may merge sg elements
1386 * during DMA mapping, and Linux currently doesn't prevent this.
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001387 */
Stefan Richterb7811da2008-01-15 21:10:50 +01001388 for (i = 0, j = 0; i < count; i++, sg = sg_next(sg)) {
1389 sg_len = sg_dma_len(sg);
1390 sg_addr = sg_dma_address(sg);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001391 while (sg_len) {
Stefan Richter332ef332007-07-01 13:56:03 +02001392 /* FIXME: This won't get us out of the pinch. */
1393 if (unlikely(j >= ARRAY_SIZE(orb->page_table))) {
1394 fw_error("page table overflow\n");
1395 goto fail_page_table;
1396 }
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001397 l = min(sg_len, SBP2_MAX_SG_ELEMENT_LENGTH);
Stefan Richter71ee9f02008-02-28 20:51:11 +01001398 orb->page_table[j].low = cpu_to_be32(sg_addr);
1399 orb->page_table[j].high = cpu_to_be32(l << 16);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001400 sg_addr += l;
1401 sg_len -= l;
1402 j++;
1403 }
1404 }
1405
Stefan Richterb4be0162007-07-02 22:07:34 +02001406 orb->page_table_bus =
1407 dma_map_single(device->card->device, orb->page_table,
1408 sizeof(orb->page_table), DMA_TO_DEVICE);
1409 if (dma_mapping_error(orb->page_table_bus))
1410 goto fail_page_table;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001411
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001412 /*
1413 * The data_descriptor pointer is the one case where we need
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001414 * to fill in the node ID part of the address. All other
1415 * pointers assume that the data referenced reside on the
1416 * initiator (i.e. us), but data_descriptor can refer to data
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001417 * on other nodes so we need to put our ID in descriptor.high.
1418 */
Stefan Richter71ee9f02008-02-28 20:51:11 +01001419 orb->request.data_descriptor.high = cpu_to_be32(lu->tgt->address_high);
1420 orb->request.data_descriptor.low = cpu_to_be32(orb->page_table_bus);
1421 orb->request.misc |= cpu_to_be32(COMMAND_ORB_PAGE_TABLE_PRESENT |
1422 COMMAND_ORB_DATA_SIZE(j));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001423
Kristian Høgsberg95ffc5e2007-05-09 19:23:08 -04001424 return 0;
1425
1426 fail_page_table:
Stefan Richter412edf62007-07-16 21:05:41 +02001427 dma_unmap_sg(device->card->device, sg, scsi_sg_count(orb->cmd),
Kristian Høgsberg95ffc5e2007-05-09 19:23:08 -04001428 orb->cmd->sc_data_direction);
1429 fail:
1430 return -ENOMEM;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001431}
1432
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001433/* SCSI stack integration */
1434
1435static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done)
1436{
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001437 struct sbp2_logical_unit *lu = cmd->device->hostdata;
1438 struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001439 struct sbp2_command_orb *orb;
Stefan Richter05cca732008-01-26 17:42:45 +01001440 unsigned int max_payload;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001441 int retval = SCSI_MLQUEUE_HOST_BUSY;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001442
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001443 /*
1444 * Bidirectional commands are not yet implemented, and unknown
1445 * transfer direction not handled.
1446 */
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001447 if (cmd->sc_data_direction == DMA_BIDIRECTIONAL) {
Stefan Richter8a8cea22007-06-09 19:26:22 +02001448 fw_error("Can't handle DMA_BIDIRECTIONAL, rejecting command\n");
Kristian Høgsberge1b68c42007-05-09 19:23:09 -04001449 cmd->result = DID_ERROR << 16;
1450 done(cmd);
1451 return 0;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001452 }
1453
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -04001454 orb = kzalloc(sizeof(*orb), GFP_ATOMIC);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001455 if (orb == NULL) {
1456 fw_notify("failed to alloc orb\n");
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001457 return SCSI_MLQUEUE_HOST_BUSY;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001458 }
1459
Kristian Høgsberg12f26aa2007-04-10 18:11:20 -04001460 /* Initialize rcode to something not RCODE_COMPLETE. */
1461 orb->base.rcode = -1;
Kristian Høgsberge57d2012007-08-24 18:59:58 -04001462 kref_init(&orb->base.kref);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001463
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001464 orb->lu = lu;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001465 orb->done = done;
1466 orb->cmd = cmd;
1467
Stefan Richter71ee9f02008-02-28 20:51:11 +01001468 orb->request.next.high = cpu_to_be32(SBP2_ORB_NULL);
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001469 /*
1470 * At speed 100 we can do 512 bytes per packet, at speed 200,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001471 * 1024 bytes per packet etc. The SBP-2 max_payload field
1472 * specifies the max payload size as 2 ^ (max_payload + 2), so
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001473 * if we set this to max_speed + 7, we get the right value.
1474 */
Stefan Richter25659f72007-07-21 22:43:05 +02001475 max_payload = min(device->max_speed + 7,
1476 device->card->max_receive - 1);
Stefan Richter71ee9f02008-02-28 20:51:11 +01001477 orb->request.misc = cpu_to_be32(
Stefan Richter25659f72007-07-21 22:43:05 +02001478 COMMAND_ORB_MAX_PAYLOAD(max_payload) |
Stefan Richterf1397492007-06-10 21:31:36 +02001479 COMMAND_ORB_SPEED(device->max_speed) |
Stefan Richter71ee9f02008-02-28 20:51:11 +01001480 COMMAND_ORB_NOTIFY);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001481
1482 if (cmd->sc_data_direction == DMA_FROM_DEVICE)
Stefan Richter0d7dcbf2008-02-28 20:52:02 +01001483 orb->request.misc |= cpu_to_be32(COMMAND_ORB_DIRECTION);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001484
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001485 if (scsi_sg_count(cmd) && sbp2_map_scatterlist(orb, device, lu) < 0)
1486 goto out;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001487
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001488 memcpy(orb->request.command_block, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd));
1489
1490 orb->base.callback = complete_command_orb;
Stefan Richter85263922007-07-02 21:04:08 +02001491 orb->base.request_bus =
1492 dma_map_single(device->card->device, &orb->request,
1493 sizeof(orb->request), DMA_TO_DEVICE);
1494 if (dma_mapping_error(orb->base.request_bus))
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001495 goto out;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001496
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001497 sbp2_send_orb(&orb->base, lu, lu->tgt->node_id, lu->generation,
1498 lu->command_block_agent_address + SBP2_ORB_POINTER);
1499 retval = 0;
1500 out:
Kristian Høgsberge57d2012007-08-24 18:59:58 -04001501 kref_put(&orb->base.kref, free_orb);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001502 return retval;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001503}
1504
Stefan Richtercfb01382007-01-23 21:20:08 +01001505static int sbp2_scsi_slave_alloc(struct scsi_device *sdev)
1506{
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001507 struct sbp2_logical_unit *lu = sdev->hostdata;
Stefan Richtercfb01382007-01-23 21:20:08 +01001508
Stefan Richter5513c5f2008-02-17 14:56:19 +01001509 /* (Re-)Adding logical units via the SCSI stack is not supported. */
1510 if (!lu)
1511 return -ENOSYS;
1512
Stefan Richtercfb01382007-01-23 21:20:08 +01001513 sdev->allow_restart = 1;
1514
Stefan Richter8ac3a472008-01-27 22:31:27 +01001515 /* SBP-2 requires quadlet alignment of the data buffers. */
1516 blk_queue_update_dma_alignment(sdev->request_queue, 4 - 1);
James Bottomley465ff312008-01-01 10:00:10 -06001517
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001518 if (lu->tgt->workarounds & SBP2_WORKAROUND_INQUIRY_36)
Stefan Richtercfb01382007-01-23 21:20:08 +01001519 sdev->inquiry_len = 36;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001520
Stefan Richtercfb01382007-01-23 21:20:08 +01001521 return 0;
1522}
1523
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001524static int sbp2_scsi_slave_configure(struct scsi_device *sdev)
1525{
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001526 struct sbp2_logical_unit *lu = sdev->hostdata;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001527
Stefan Richtercfb01382007-01-23 21:20:08 +01001528 sdev->use_10_for_rw = 1;
1529
1530 if (sdev->type == TYPE_ROM)
1531 sdev->use_10_for_ms = 1;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001532
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001533 if (sdev->type == TYPE_DISK &&
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001534 lu->tgt->workarounds & SBP2_WORKAROUND_MODE_SENSE_8)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001535 sdev->skip_ms_page_8 = 1;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001536
1537 if (lu->tgt->workarounds & SBP2_WORKAROUND_FIX_CAPACITY)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001538 sdev->fix_capacity = 1;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001539
1540 if (lu->tgt->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS)
Stefan Richtercf47c7a2007-06-17 23:52:08 +02001541 blk_queue_max_sectors(sdev->request_queue, 128 * 1024 / 512);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001542
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001543 return 0;
1544}
1545
1546/*
1547 * Called by scsi stack when something has really gone wrong. Usually
1548 * called when a command has timed-out for some reason.
1549 */
1550static int sbp2_scsi_abort(struct scsi_cmnd *cmd)
1551{
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001552 struct sbp2_logical_unit *lu = cmd->device->hostdata;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001553
Stefan Richter48f18c72008-02-03 23:09:50 +01001554 fw_notify("%s: sbp2_scsi_abort\n", lu->tgt->bus_id);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001555 sbp2_agent_reset(lu);
1556 sbp2_cancel_orbs(lu);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001557
1558 return SUCCESS;
1559}
1560
Stefan Richter14e21982007-05-27 13:18:27 +02001561/*
1562 * Format of /sys/bus/scsi/devices/.../ieee1394_id:
1563 * u64 EUI-64 : u24 directory_ID : u16 LUN (all printed in hexadecimal)
1564 *
1565 * This is the concatenation of target port identifier and logical unit
1566 * identifier as per SAM-2...SAM-4 annex A.
1567 */
1568static ssize_t
1569sbp2_sysfs_ieee1394_id_show(struct device *dev, struct device_attribute *attr,
1570 char *buf)
1571{
1572 struct scsi_device *sdev = to_scsi_device(dev);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001573 struct sbp2_logical_unit *lu;
Stefan Richter14e21982007-05-27 13:18:27 +02001574 struct fw_device *device;
Stefan Richter14e21982007-05-27 13:18:27 +02001575
1576 if (!sdev)
1577 return 0;
Stefan Richter14e21982007-05-27 13:18:27 +02001578
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001579 lu = sdev->hostdata;
1580 device = fw_device(lu->tgt->unit->device.parent);
Stefan Richter14e21982007-05-27 13:18:27 +02001581
1582 return sprintf(buf, "%08x%08x:%06x:%04x\n",
1583 device->config_rom[3], device->config_rom[4],
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001584 lu->tgt->directory_id, lu->lun);
Stefan Richter14e21982007-05-27 13:18:27 +02001585}
1586
1587static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL);
1588
1589static struct device_attribute *sbp2_scsi_sysfs_attrs[] = {
1590 &dev_attr_ieee1394_id,
1591 NULL
1592};
1593
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001594static struct scsi_host_template scsi_driver_template = {
1595 .module = THIS_MODULE,
1596 .name = "SBP-2 IEEE-1394",
Kristian Høgsbergb02b6bc2007-05-09 19:23:12 -04001597 .proc_name = sbp2_driver_name,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001598 .queuecommand = sbp2_scsi_queuecommand,
Stefan Richtercfb01382007-01-23 21:20:08 +01001599 .slave_alloc = sbp2_scsi_slave_alloc,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001600 .slave_configure = sbp2_scsi_slave_configure,
1601 .eh_abort_handler = sbp2_scsi_abort,
1602 .this_id = -1,
1603 .sg_tablesize = SG_ALL,
1604 .use_clustering = ENABLE_CLUSTERING,
Stefan Richter02af8e72007-01-21 20:50:11 +01001605 .cmd_per_lun = 1,
1606 .can_queue = 1,
Stefan Richter14e21982007-05-27 13:18:27 +02001607 .sdev_attrs = sbp2_scsi_sysfs_attrs,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001608};
1609
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001610MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>");
1611MODULE_DESCRIPTION("SCSI over IEEE1394");
1612MODULE_LICENSE("GPL");
1613MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table);
1614
Olaf Hering1e4c7b02007-05-05 23:17:13 +02001615/* Provide a module alias so root-on-sbp2 initrds don't break. */
1616#ifndef CONFIG_IEEE1394_SBP2_MODULE
1617MODULE_ALIAS("sbp2");
1618#endif
1619
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001620static int __init sbp2_init(void)
1621{
Stefan Richterdf8ec242007-08-12 12:51:18 +02001622 sbp2_wq = create_singlethread_workqueue(KBUILD_MODNAME);
1623 if (!sbp2_wq)
1624 return -ENOMEM;
1625
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001626 return driver_register(&sbp2_driver.driver);
1627}
1628
1629static void __exit sbp2_cleanup(void)
1630{
1631 driver_unregister(&sbp2_driver.driver);
Stefan Richterdf8ec242007-08-12 12:51:18 +02001632 destroy_workqueue(sbp2_wq);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001633}
1634
1635module_init(sbp2_init);
1636module_exit(sbp2_cleanup);