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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 Richter9220f192008-02-03 23:04:38 +010033#include <linux/delay.h>
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -050034#include <linux/device.h>
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -050035#include <linux/dma-mapping.h>
Stefan Richter7bb6bf72008-02-03 23:12:17 +010036#include <linux/kernel.h>
37#include <linux/mod_devicetable.h>
38#include <linux/module.h>
39#include <linux/moduleparam.h>
40#include <linux/scatterlist.h>
Stefan Richtere7cdf232007-07-01 13:54:57 +020041#include <linux/string.h>
Stefan Richter2df222b2007-08-13 17:48:25 +020042#include <linux/stringify.h>
Kristian Høgsberg1d3d52c2007-02-06 14:49:33 -050043#include <linux/timer.h>
Stefan Richterdf8ec242007-08-12 12:51:18 +020044#include <linux/workqueue.h>
Stefan Richterb5d2a5e2008-01-25 18:57:41 +010045#include <asm/system.h>
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -050046
47#include <scsi/scsi.h>
48#include <scsi/scsi_cmnd.h>
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -050049#include <scsi/scsi_device.h>
50#include <scsi/scsi_host.h>
51
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -050052#include "fw-device.h"
Stefan Richter7bb6bf72008-02-03 23:12:17 +010053#include "fw-topology.h"
54#include "fw-transaction.h"
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -050055
Stefan Richter5cd54c92007-06-17 23:55:41 +020056/*
57 * So far only bridges from Oxford Semiconductor are known to support
58 * concurrent logins. Depending on firmware, four or two concurrent logins
59 * are possible on OXFW911 and newer Oxsemi bridges.
60 *
61 * Concurrent logins are useful together with cluster filesystems.
62 */
63static int sbp2_param_exclusive_login = 1;
64module_param_named(exclusive_login, sbp2_param_exclusive_login, bool, 0644);
65MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device "
66 "(default = Y, use N for concurrent initiators)");
67
Stefan Richter2df222b2007-08-13 17:48:25 +020068/*
69 * Flags for firmware oddities
70 *
71 * - 128kB max transfer
72 * Limit transfer size. Necessary for some old bridges.
73 *
74 * - 36 byte inquiry
75 * When scsi_mod probes the device, let the inquiry command look like that
76 * from MS Windows.
77 *
78 * - skip mode page 8
79 * Suppress sending of mode_sense for mode page 8 if the device pretends to
80 * support the SCSI Primary Block commands instead of Reduced Block Commands.
81 *
82 * - fix capacity
83 * Tell sd_mod to correct the last sector number reported by read_capacity.
84 * Avoids access beyond actual disk limits on devices with an off-by-one bug.
85 * Don't use this with devices which don't have this bug.
86 *
Stefan Richter9220f192008-02-03 23:04:38 +010087 * - delay inquiry
88 * Wait extra SBP2_INQUIRY_DELAY seconds after login before SCSI inquiry.
89 *
Stefan Richterffcaade2008-05-11 00:35:04 +020090 * - power condition
91 * Set the power condition field in the START STOP UNIT commands sent by
92 * sd_mod on suspend, resume, and shutdown (if manage_start_stop is on).
93 * Some disks need this to spin down or to resume properly.
94 *
Stefan Richter2df222b2007-08-13 17:48:25 +020095 * - override internal blacklist
96 * Instead of adding to the built-in blacklist, use only the workarounds
97 * specified in the module load parameter.
98 * Useful if a blacklist entry interfered with a non-broken device.
99 */
100#define SBP2_WORKAROUND_128K_MAX_TRANS 0x1
101#define SBP2_WORKAROUND_INQUIRY_36 0x2
102#define SBP2_WORKAROUND_MODE_SENSE_8 0x4
103#define SBP2_WORKAROUND_FIX_CAPACITY 0x8
Stefan Richter9220f192008-02-03 23:04:38 +0100104#define SBP2_WORKAROUND_DELAY_INQUIRY 0x10
105#define SBP2_INQUIRY_DELAY 12
Stefan Richterffcaade2008-05-11 00:35:04 +0200106#define SBP2_WORKAROUND_POWER_CONDITION 0x20
Stefan Richter2df222b2007-08-13 17:48:25 +0200107#define SBP2_WORKAROUND_OVERRIDE 0x100
108
109static int sbp2_param_workarounds;
110module_param_named(workarounds, sbp2_param_workarounds, int, 0644);
111MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0"
112 ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS)
113 ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36)
114 ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8)
115 ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY)
Stefan Richter9220f192008-02-03 23:04:38 +0100116 ", delay inquiry = " __stringify(SBP2_WORKAROUND_DELAY_INQUIRY)
Stefan Richterffcaade2008-05-11 00:35:04 +0200117 ", set power condition in start stop unit = "
118 __stringify(SBP2_WORKAROUND_POWER_CONDITION)
Stefan Richter2df222b2007-08-13 17:48:25 +0200119 ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE)
120 ", or a combination)");
121
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500122/* I don't know why the SCSI stack doesn't define something like this... */
Kristian Høgsberga98e2712007-05-07 20:33:34 -0400123typedef void (*scsi_done_fn_t)(struct scsi_cmnd *);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500124
125static const char sbp2_driver_name[] = "sbp2";
126
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200127/*
128 * We create one struct sbp2_logical_unit per SBP-2 Logical Unit Number Entry
129 * and one struct scsi_device per sbp2_logical_unit.
130 */
131struct sbp2_logical_unit {
132 struct sbp2_target *tgt;
133 struct list_head link;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500134 struct fw_address_handler address_handler;
135 struct list_head orb_list;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200136
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500137 u64 command_block_agent_address;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200138 u16 lun;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500139 int login_id;
140
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400141 /*
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200142 * The generation is updated once we've logged in or reconnected
143 * to the logical unit. Thus, I/O to the device will automatically
144 * fail and get retried if it happens in a window where the device
145 * is not ready, e.g. after a bus reset but before we reconnect.
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400146 */
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500147 int generation;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500148 int retries;
149 struct delayed_work work;
Stefan Richterf8436152008-02-26 23:30:02 +0100150 bool has_sdev;
Stefan Richter2e2705b2008-02-16 16:37:28 +0100151 bool blocked;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500152};
153
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200154/*
155 * We create one struct sbp2_target per IEEE 1212 Unit Directory
156 * and one struct Scsi_Host per sbp2_target.
157 */
158struct sbp2_target {
159 struct kref kref;
160 struct fw_unit *unit;
Stefan Richter48f18c72008-02-03 23:09:50 +0100161 const char *bus_id;
Stefan Richter05cca732008-01-26 17:42:45 +0100162 struct list_head lu_list;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200163
164 u64 management_agent_address;
Stefan Richterc9755e12008-03-24 20:54:28 +0100165 u64 guid;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200166 int directory_id;
167 int node_id;
168 int address_high;
Stefan Richter05cca732008-01-26 17:42:45 +0100169 unsigned int workarounds;
Jarod Wilson384170d2008-01-25 23:31:12 -0500170 unsigned int mgt_orb_timeout;
Stefan Richtera08e1002009-01-24 19:41:46 +0100171 unsigned int max_payload;
Stefan Richter2e2705b2008-02-16 16:37:28 +0100172
173 int dont_block; /* counter for each logical unit */
174 int blocked; /* ditto */
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200175};
176
Jay Fenlasoncd1f70fd2008-10-24 15:26:20 -0400177/* Impossible login_id, to detect logout attempt before successful login */
178#define INVALID_LOGIN_ID 0x10000
179
Jarod Wilsona4c379c2008-01-19 13:15:05 +0100180/*
181 * Per section 7.4.8 of the SBP-2 spec, a mgt_ORB_timeout value can be
Jarod Wilson384170d2008-01-25 23:31:12 -0500182 * provided in the config rom. Most devices do provide a value, which
183 * we'll use for login management orbs, but with some sane limits.
Jarod Wilsona4c379c2008-01-19 13:15:05 +0100184 */
Jarod Wilson384170d2008-01-25 23:31:12 -0500185#define SBP2_MIN_LOGIN_ORB_TIMEOUT 5000U /* Timeout in ms */
186#define SBP2_MAX_LOGIN_ORB_TIMEOUT 40000U /* Timeout in ms */
Stefan Richter05cca732008-01-26 17:42:45 +0100187#define SBP2_ORB_TIMEOUT 2000U /* Timeout in ms */
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500188#define SBP2_ORB_NULL 0x80000000
Jarod Wilson17cff9f2008-03-07 01:43:31 -0500189#define SBP2_RETRY_LIMIT 0xf /* 15 retries */
190#define SBP2_CYCLE_LIMIT (0xc8 << 12) /* 200 125us cycles */
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500191
Stefan Richter09b12dd2008-08-14 21:47:21 +0200192/*
193 * The default maximum s/g segment size of a FireWire controller is
194 * usually 0x10000, but SBP-2 only allows 0xffff. Since buffers have to
195 * be quadlet-aligned, we set the length limit to 0xffff & ~3.
196 */
197#define SBP2_MAX_SEG_SIZE 0xfffc
198
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500199/* Unit directory keys */
Jarod Wilson384170d2008-01-25 23:31:12 -0500200#define SBP2_CSR_UNIT_CHARACTERISTICS 0x3a
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200201#define SBP2_CSR_FIRMWARE_REVISION 0x3c
202#define SBP2_CSR_LOGICAL_UNIT_NUMBER 0x14
203#define SBP2_CSR_LOGICAL_UNIT_DIRECTORY 0xd4
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500204
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500205/* Management orb opcodes */
206#define SBP2_LOGIN_REQUEST 0x0
207#define SBP2_QUERY_LOGINS_REQUEST 0x1
208#define SBP2_RECONNECT_REQUEST 0x3
209#define SBP2_SET_PASSWORD_REQUEST 0x4
210#define SBP2_LOGOUT_REQUEST 0x7
211#define SBP2_ABORT_TASK_REQUEST 0xb
212#define SBP2_ABORT_TASK_SET 0xc
213#define SBP2_LOGICAL_UNIT_RESET 0xe
214#define SBP2_TARGET_RESET_REQUEST 0xf
215
216/* Offsets for command block agent registers */
217#define SBP2_AGENT_STATE 0x00
218#define SBP2_AGENT_RESET 0x04
219#define SBP2_ORB_POINTER 0x08
220#define SBP2_DOORBELL 0x10
221#define SBP2_UNSOLICITED_STATUS_ENABLE 0x14
222
223/* Status write response codes */
224#define SBP2_STATUS_REQUEST_COMPLETE 0x0
225#define SBP2_STATUS_TRANSPORT_FAILURE 0x1
226#define SBP2_STATUS_ILLEGAL_REQUEST 0x2
227#define SBP2_STATUS_VENDOR_DEPENDENT 0x3
228
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400229#define STATUS_GET_ORB_HIGH(v) ((v).status & 0xffff)
230#define STATUS_GET_SBP_STATUS(v) (((v).status >> 16) & 0xff)
231#define STATUS_GET_LEN(v) (((v).status >> 24) & 0x07)
232#define STATUS_GET_DEAD(v) (((v).status >> 27) & 0x01)
233#define STATUS_GET_RESPONSE(v) (((v).status >> 28) & 0x03)
234#define STATUS_GET_SOURCE(v) (((v).status >> 30) & 0x03)
235#define STATUS_GET_ORB_LOW(v) ((v).orb_low)
236#define STATUS_GET_DATA(v) ((v).data)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500237
238struct sbp2_status {
239 u32 status;
240 u32 orb_low;
241 u8 data[24];
242};
243
244struct sbp2_pointer {
Stefan Richter71ee9f02008-02-28 20:51:11 +0100245 __be32 high;
246 __be32 low;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500247};
248
249struct sbp2_orb {
250 struct fw_transaction t;
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400251 struct kref kref;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500252 dma_addr_t request_bus;
253 int rcode;
254 struct sbp2_pointer pointer;
Kristian Høgsberga98e2712007-05-07 20:33:34 -0400255 void (*callback)(struct sbp2_orb * orb, struct sbp2_status * status);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500256 struct list_head link;
257};
258
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400259#define MANAGEMENT_ORB_LUN(v) ((v))
260#define MANAGEMENT_ORB_FUNCTION(v) ((v) << 16)
261#define MANAGEMENT_ORB_RECONNECT(v) ((v) << 20)
Stefan Richter5cd54c92007-06-17 23:55:41 +0200262#define MANAGEMENT_ORB_EXCLUSIVE(v) ((v) ? 1 << 28 : 0)
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400263#define MANAGEMENT_ORB_REQUEST_FORMAT(v) ((v) << 29)
264#define MANAGEMENT_ORB_NOTIFY ((1) << 31)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500265
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400266#define MANAGEMENT_ORB_RESPONSE_LENGTH(v) ((v))
267#define MANAGEMENT_ORB_PASSWORD_LENGTH(v) ((v) << 16)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500268
269struct sbp2_management_orb {
270 struct sbp2_orb base;
271 struct {
272 struct sbp2_pointer password;
273 struct sbp2_pointer response;
Stefan Richter71ee9f02008-02-28 20:51:11 +0100274 __be32 misc;
275 __be32 length;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500276 struct sbp2_pointer status_fifo;
277 } request;
278 __be32 response[4];
279 dma_addr_t response_bus;
280 struct completion done;
281 struct sbp2_status status;
282};
283
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500284struct sbp2_login_response {
Stefan Richter71ee9f02008-02-28 20:51:11 +0100285 __be32 misc;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500286 struct sbp2_pointer command_block_agent;
Stefan Richter71ee9f02008-02-28 20:51:11 +0100287 __be32 reconnect_hold;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500288};
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400289#define COMMAND_ORB_DATA_SIZE(v) ((v))
290#define COMMAND_ORB_PAGE_SIZE(v) ((v) << 16)
291#define COMMAND_ORB_PAGE_TABLE_PRESENT ((1) << 19)
292#define COMMAND_ORB_MAX_PAYLOAD(v) ((v) << 20)
293#define COMMAND_ORB_SPEED(v) ((v) << 24)
Stefan Richter0d7dcbf2008-02-28 20:52:02 +0100294#define COMMAND_ORB_DIRECTION ((1) << 27)
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400295#define COMMAND_ORB_REQUEST_FORMAT(v) ((v) << 29)
296#define COMMAND_ORB_NOTIFY ((1) << 31)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500297
298struct sbp2_command_orb {
299 struct sbp2_orb base;
300 struct {
301 struct sbp2_pointer next;
302 struct sbp2_pointer data_descriptor;
Stefan Richter71ee9f02008-02-28 20:51:11 +0100303 __be32 misc;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500304 u8 command_block[12];
305 } request;
306 struct scsi_cmnd *cmd;
307 scsi_done_fn_t done;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200308 struct sbp2_logical_unit *lu;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500309
Stefan Richter9fb2dd12007-07-01 13:55:31 +0200310 struct sbp2_pointer page_table[SG_ALL] __attribute__((aligned(8)));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500311 dma_addr_t page_table_bus;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500312};
313
Stefan Richterf7460722009-01-24 19:41:46 +0100314#define SBP2_ROM_VALUE_WILDCARD ~0 /* match all */
315#define SBP2_ROM_VALUE_MISSING 0xff000000 /* not present in the unit dir. */
316
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500317/*
318 * List of devices with known bugs.
319 *
320 * The firmware_revision field, masked with 0xffff00, is the best
321 * indicator for the type of bridge chip of a device. It yields a few
322 * false positives but this did not break correctly behaving devices
Stefan Richterf7460722009-01-24 19:41:46 +0100323 * so far.
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500324 */
325static const struct {
326 u32 firmware_revision;
327 u32 model;
Stefan Richter05cca732008-01-26 17:42:45 +0100328 unsigned int workarounds;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500329} sbp2_workarounds_table[] = {
330 /* DViCO Momobay CX-1 with TSB42AA9 bridge */ {
331 .firmware_revision = 0x002800,
332 .model = 0x001010,
333 .workarounds = SBP2_WORKAROUND_INQUIRY_36 |
Stefan Richterffcaade2008-05-11 00:35:04 +0200334 SBP2_WORKAROUND_MODE_SENSE_8 |
335 SBP2_WORKAROUND_POWER_CONDITION,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500336 },
Stefan Richter9220f192008-02-03 23:04:38 +0100337 /* DViCO Momobay FX-3A with TSB42AA9A bridge */ {
338 .firmware_revision = 0x002800,
339 .model = 0x000000,
Stefan Richterffcaade2008-05-11 00:35:04 +0200340 .workarounds = SBP2_WORKAROUND_DELAY_INQUIRY |
341 SBP2_WORKAROUND_POWER_CONDITION,
Stefan Richter9220f192008-02-03 23:04:38 +0100342 },
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500343 /* Initio bridges, actually only needed for some older ones */ {
344 .firmware_revision = 0x000200,
Stefan Richterf7460722009-01-24 19:41:46 +0100345 .model = SBP2_ROM_VALUE_WILDCARD,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500346 .workarounds = SBP2_WORKAROUND_INQUIRY_36,
347 },
Stefan Richterffcaade2008-05-11 00:35:04 +0200348 /* PL-3507 bridge with Prolific firmware */ {
349 .firmware_revision = 0x012800,
Stefan Richterf7460722009-01-24 19:41:46 +0100350 .model = SBP2_ROM_VALUE_WILDCARD,
Stefan Richterffcaade2008-05-11 00:35:04 +0200351 .workarounds = SBP2_WORKAROUND_POWER_CONDITION,
352 },
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500353 /* Symbios bridge */ {
354 .firmware_revision = 0xa0b800,
Stefan Richterf7460722009-01-24 19:41:46 +0100355 .model = SBP2_ROM_VALUE_WILDCARD,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500356 .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS,
357 },
Stefan Richter2aa9ff72008-03-11 22:32:03 +0100358 /* Datafab MD2-FW2 with Symbios/LSILogic SYM13FW500 bridge */ {
359 .firmware_revision = 0x002600,
Stefan Richterf7460722009-01-24 19:41:46 +0100360 .model = SBP2_ROM_VALUE_WILDCARD,
Stefan Richter2aa9ff72008-03-11 22:32:03 +0100361 .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS,
362 },
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400363 /*
Stefan Richterc8c47072009-01-29 00:11:59 +0100364 * iPod 2nd generation: needs 128k max transfer size workaround
365 * iPod 3rd generation: needs fix capacity workaround
Kristian Høgsbergc781c062007-05-07 20:33:32 -0400366 */
Stefan Richterc8c47072009-01-29 00:11:59 +0100367 {
368 .firmware_revision = 0x0a2700,
369 .model = 0x000000,
370 .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS |
371 SBP2_WORKAROUND_FIX_CAPACITY,
372 },
373 /* iPod 4th generation */ {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500374 .firmware_revision = 0x0a2700,
375 .model = 0x000021,
376 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
377 },
378 /* iPod mini */ {
379 .firmware_revision = 0x0a2700,
Stefan Richter031bb272008-11-22 12:38:58 +0100380 .model = 0x000022,
381 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
382 },
383 /* iPod mini */ {
384 .firmware_revision = 0x0a2700,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500385 .model = 0x000023,
386 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
387 },
388 /* iPod Photo */ {
389 .firmware_revision = 0x0a2700,
390 .model = 0x00007e,
391 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
392 }
393};
394
Stefan Richter53dca512008-12-14 21:47:04 +0100395static void free_orb(struct kref *kref)
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400396{
397 struct sbp2_orb *orb = container_of(kref, struct sbp2_orb, kref);
398
399 kfree(orb);
400}
401
Stefan Richter53dca512008-12-14 21:47:04 +0100402static void sbp2_status_write(struct fw_card *card, struct fw_request *request,
403 int tcode, int destination, int source,
404 int generation, int speed,
405 unsigned long long offset,
406 void *payload, size_t length, void *callback_data)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500407{
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200408 struct sbp2_logical_unit *lu = callback_data;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500409 struct sbp2_orb *orb;
410 struct sbp2_status status;
411 size_t header_size;
412 unsigned long flags;
413
414 if (tcode != TCODE_WRITE_BLOCK_REQUEST ||
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400415 length == 0 || length > sizeof(status)) {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500416 fw_send_response(card, request, RCODE_TYPE_ERROR);
417 return;
418 }
419
420 header_size = min(length, 2 * sizeof(u32));
421 fw_memcpy_from_be32(&status, payload, header_size);
422 if (length > header_size)
423 memcpy(status.data, payload + 8, length - header_size);
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400424 if (STATUS_GET_SOURCE(status) == 2 || STATUS_GET_SOURCE(status) == 3) {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500425 fw_notify("non-orb related status write, not handled\n");
426 fw_send_response(card, request, RCODE_COMPLETE);
427 return;
428 }
429
430 /* Lookup the orb corresponding to this status write. */
431 spin_lock_irqsave(&card->lock, flags);
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200432 list_for_each_entry(orb, &lu->orb_list, link) {
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400433 if (STATUS_GET_ORB_HIGH(status) == 0 &&
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400434 STATUS_GET_ORB_LOW(status) == orb->request_bus) {
435 orb->rcode = RCODE_COMPLETE;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500436 list_del(&orb->link);
437 break;
438 }
439 }
440 spin_unlock_irqrestore(&card->lock, flags);
441
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200442 if (&orb->link != &lu->orb_list)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500443 orb->callback(orb, &status);
444 else
445 fw_error("status write for unknown orb\n");
446
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400447 kref_put(&orb->kref, free_orb);
448
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500449 fw_send_response(card, request, RCODE_COMPLETE);
450}
451
Stefan Richter53dca512008-12-14 21:47:04 +0100452static void complete_transaction(struct fw_card *card, int rcode,
453 void *payload, size_t length, void *data)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500454{
455 struct sbp2_orb *orb = data;
456 unsigned long flags;
457
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400458 /*
459 * This is a little tricky. We can get the status write for
460 * the orb before we get this callback. The status write
461 * handler above will assume the orb pointer transaction was
462 * successful and set the rcode to RCODE_COMPLETE for the orb.
463 * So this callback only sets the rcode if it hasn't already
464 * been set and only does the cleanup if the transaction
465 * failed and we didn't already get a status write.
466 */
467 spin_lock_irqsave(&card->lock, flags);
468
469 if (orb->rcode == -1)
470 orb->rcode = rcode;
471 if (orb->rcode != RCODE_COMPLETE) {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500472 list_del(&orb->link);
Stefan Richter1b34e972007-08-25 10:40:42 +0200473 spin_unlock_irqrestore(&card->lock, flags);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500474 orb->callback(orb, NULL);
Stefan Richter1b34e972007-08-25 10:40:42 +0200475 } else {
476 spin_unlock_irqrestore(&card->lock, flags);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500477 }
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400478
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400479 kref_put(&orb->kref, free_orb);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500480}
481
Stefan Richter53dca512008-12-14 21:47:04 +0100482static void sbp2_send_orb(struct sbp2_orb *orb, struct sbp2_logical_unit *lu,
483 int node_id, int generation, u64 offset)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500484{
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200485 struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500486 unsigned long flags;
487
488 orb->pointer.high = 0;
Stefan Richter71ee9f02008-02-28 20:51:11 +0100489 orb->pointer.low = cpu_to_be32(orb->request_bus);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500490
491 spin_lock_irqsave(&device->card->lock, flags);
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200492 list_add_tail(&orb->link, &lu->orb_list);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500493 spin_unlock_irqrestore(&device->card->lock, flags);
494
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400495 /* Take a ref for the orb list and for the transaction callback. */
496 kref_get(&orb->kref);
497 kref_get(&orb->kref);
498
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500499 fw_send_request(device->card, &orb->t, TCODE_WRITE_BLOCK_REQUEST,
Stefan Richterf1397492007-06-10 21:31:36 +0200500 node_id, generation, device->max_speed, offset,
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400501 &orb->pointer, sizeof(orb->pointer),
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500502 complete_transaction, orb);
503}
504
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200505static int sbp2_cancel_orbs(struct sbp2_logical_unit *lu)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500506{
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200507 struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500508 struct sbp2_orb *orb, *next;
509 struct list_head list;
510 unsigned long flags;
Kristian Høgsberg2aaad972007-03-07 12:12:47 -0500511 int retval = -ENOENT;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500512
513 INIT_LIST_HEAD(&list);
514 spin_lock_irqsave(&device->card->lock, flags);
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200515 list_splice_init(&lu->orb_list, &list);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500516 spin_unlock_irqrestore(&device->card->lock, flags);
517
518 list_for_each_entry_safe(orb, next, &list, link) {
Kristian Høgsberg2aaad972007-03-07 12:12:47 -0500519 retval = 0;
Kristian Høgsberg730c32f2007-02-06 14:49:32 -0500520 if (fw_cancel_transaction(device->card, &orb->t) == 0)
521 continue;
522
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500523 orb->rcode = RCODE_CANCELLED;
524 orb->callback(orb, NULL);
525 }
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500526
Kristian Høgsberg2aaad972007-03-07 12:12:47 -0500527 return retval;
Kristian Høgsberg1d3d52c2007-02-06 14:49:33 -0500528}
529
Stefan Richter53dca512008-12-14 21:47:04 +0100530static void complete_management_orb(struct sbp2_orb *base_orb,
531 struct sbp2_status *status)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500532{
533 struct sbp2_management_orb *orb =
Jay Fenlason6f061482007-06-27 16:04:33 -0400534 container_of(base_orb, struct sbp2_management_orb, base);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500535
536 if (status)
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400537 memcpy(&orb->status, status, sizeof(*status));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500538 complete(&orb->done);
539}
540
Stefan Richter53dca512008-12-14 21:47:04 +0100541static int sbp2_send_management_orb(struct sbp2_logical_unit *lu, int node_id,
542 int generation, int function,
543 int lun_or_login_id, void *response)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500544{
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200545 struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500546 struct sbp2_management_orb *orb;
Jarod Wilsona4c379c2008-01-19 13:15:05 +0100547 unsigned int timeout;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500548 int retval = -ENOMEM;
549
Stefan Richterbe6f48b2008-01-27 19:14:44 +0100550 if (function == SBP2_LOGOUT_REQUEST && fw_device_is_shutdown(device))
551 return 0;
552
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400553 orb = kzalloc(sizeof(*orb), GFP_ATOMIC);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500554 if (orb == NULL)
555 return -ENOMEM;
556
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400557 kref_init(&orb->base.kref);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500558 orb->response_bus =
559 dma_map_single(device->card->device, &orb->response,
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400560 sizeof(orb->response), DMA_FROM_DEVICE);
FUJITA Tomonori8d8bb392008-07-25 19:44:49 -0700561 if (dma_mapping_error(device->card->device, orb->response_bus))
Stefan Richter7aa48482007-07-02 21:04:44 +0200562 goto fail_mapping_response;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500563
Stefan Richter71ee9f02008-02-28 20:51:11 +0100564 orb->request.response.high = 0;
565 orb->request.response.low = cpu_to_be32(orb->response_bus);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500566
Stefan Richter71ee9f02008-02-28 20:51:11 +0100567 orb->request.misc = cpu_to_be32(
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400568 MANAGEMENT_ORB_NOTIFY |
569 MANAGEMENT_ORB_FUNCTION(function) |
Stefan Richter71ee9f02008-02-28 20:51:11 +0100570 MANAGEMENT_ORB_LUN(lun_or_login_id));
571 orb->request.length = cpu_to_be32(
572 MANAGEMENT_ORB_RESPONSE_LENGTH(sizeof(orb->response)));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500573
Stefan Richter71ee9f02008-02-28 20:51:11 +0100574 orb->request.status_fifo.high =
575 cpu_to_be32(lu->address_handler.offset >> 32);
576 orb->request.status_fifo.low =
577 cpu_to_be32(lu->address_handler.offset);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500578
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500579 if (function == SBP2_LOGIN_REQUEST) {
Stefan Richter14dc9922008-01-20 01:25:31 +0100580 /* Ask for 2^2 == 4 seconds reconnect grace period */
Stefan Richter71ee9f02008-02-28 20:51:11 +0100581 orb->request.misc |= cpu_to_be32(
Stefan Richter14dc9922008-01-20 01:25:31 +0100582 MANAGEMENT_ORB_RECONNECT(2) |
Stefan Richter71ee9f02008-02-28 20:51:11 +0100583 MANAGEMENT_ORB_EXCLUSIVE(sbp2_param_exclusive_login));
Jarod Wilson384170d2008-01-25 23:31:12 -0500584 timeout = lu->tgt->mgt_orb_timeout;
Jarod Wilsona4c379c2008-01-19 13:15:05 +0100585 } else {
586 timeout = SBP2_ORB_TIMEOUT;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500587 }
588
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500589 init_completion(&orb->done);
590 orb->base.callback = complete_management_orb;
Kristian Høgsberg2aaad972007-03-07 12:12:47 -0500591
Stefan Richter7aa48482007-07-02 21:04:44 +0200592 orb->base.request_bus =
593 dma_map_single(device->card->device, &orb->request,
594 sizeof(orb->request), DMA_TO_DEVICE);
FUJITA Tomonori8d8bb392008-07-25 19:44:49 -0700595 if (dma_mapping_error(device->card->device, orb->base.request_bus))
Stefan Richter7aa48482007-07-02 21:04:44 +0200596 goto fail_mapping_request;
597
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200598 sbp2_send_orb(&orb->base, lu, node_id, generation,
599 lu->tgt->management_agent_address);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500600
Jarod Wilsona4c379c2008-01-19 13:15:05 +0100601 wait_for_completion_timeout(&orb->done, msecs_to_jiffies(timeout));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500602
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500603 retval = -EIO;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200604 if (sbp2_cancel_orbs(lu) == 0) {
Stefan Richter48f18c72008-02-03 23:09:50 +0100605 fw_error("%s: orb reply timed out, rcode=0x%02x\n",
606 lu->tgt->bus_id, orb->base.rcode);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500607 goto out;
608 }
609
Kristian Høgsberg2aaad972007-03-07 12:12:47 -0500610 if (orb->base.rcode != RCODE_COMPLETE) {
Stefan Richter48f18c72008-02-03 23:09:50 +0100611 fw_error("%s: management write failed, rcode 0x%02x\n",
612 lu->tgt->bus_id, orb->base.rcode);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500613 goto out;
614 }
615
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400616 if (STATUS_GET_RESPONSE(orb->status) != 0 ||
617 STATUS_GET_SBP_STATUS(orb->status) != 0) {
Stefan Richter48f18c72008-02-03 23:09:50 +0100618 fw_error("%s: error status: %d:%d\n", lu->tgt->bus_id,
Kristian Høgsberga77754a2007-05-07 20:33:35 -0400619 STATUS_GET_RESPONSE(orb->status),
620 STATUS_GET_SBP_STATUS(orb->status));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500621 goto out;
622 }
623
624 retval = 0;
625 out:
626 dma_unmap_single(device->card->device, orb->base.request_bus,
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400627 sizeof(orb->request), DMA_TO_DEVICE);
Stefan Richter7aa48482007-07-02 21:04:44 +0200628 fail_mapping_request:
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500629 dma_unmap_single(device->card->device, orb->response_bus,
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -0400630 sizeof(orb->response), DMA_FROM_DEVICE);
Stefan Richter7aa48482007-07-02 21:04:44 +0200631 fail_mapping_response:
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500632 if (response)
Stefan Richter71ee9f02008-02-28 20:51:11 +0100633 memcpy(response, orb->response, sizeof(orb->response));
Kristian Høgsberge57d2012007-08-24 18:59:58 -0400634 kref_put(&orb->base.kref, free_orb);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500635
636 return retval;
637}
638
Stefan Richtere0e60212008-02-03 23:08:58 +0100639static void sbp2_agent_reset(struct sbp2_logical_unit *lu)
640{
641 struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
Jay Fenlason1e119fa2008-07-20 14:20:53 +0200642 __be32 d = 0;
Stefan Richtere0e60212008-02-03 23:08:58 +0100643
Jay Fenlason1e119fa2008-07-20 14:20:53 +0200644 fw_run_transaction(device->card, TCODE_WRITE_QUADLET_REQUEST,
645 lu->tgt->node_id, lu->generation, device->max_speed,
646 lu->command_block_agent_address + SBP2_AGENT_RESET,
647 &d, sizeof(d));
Stefan Richtere0e60212008-02-03 23:08:58 +0100648}
649
Stefan Richter53dca512008-12-14 21:47:04 +0100650static void complete_agent_reset_write_no_wait(struct fw_card *card,
651 int rcode, void *payload, size_t length, void *data)
Stefan Richtere0e60212008-02-03 23:08:58 +0100652{
653 kfree(data);
654}
655
656static void sbp2_agent_reset_no_wait(struct sbp2_logical_unit *lu)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500657{
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200658 struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500659 struct fw_transaction *t;
Jay Fenlason1e119fa2008-07-20 14:20:53 +0200660 static __be32 d;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500661
Stefan Richtere0e60212008-02-03 23:08:58 +0100662 t = kmalloc(sizeof(*t), GFP_ATOMIC);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500663 if (t == NULL)
Stefan Richtere0e60212008-02-03 23:08:58 +0100664 return;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500665
666 fw_send_request(device->card, t, TCODE_WRITE_QUADLET_REQUEST,
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200667 lu->tgt->node_id, lu->generation, device->max_speed,
668 lu->command_block_agent_address + SBP2_AGENT_RESET,
Jay Fenlason1e119fa2008-07-20 14:20:53 +0200669 &d, sizeof(d), complete_agent_reset_write_no_wait, t);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500670}
671
Stefan Richter2e2705b2008-02-16 16:37:28 +0100672static inline void sbp2_allow_block(struct sbp2_logical_unit *lu)
673{
674 /*
675 * We may access dont_block without taking card->lock here:
676 * All callers of sbp2_allow_block() and all callers of sbp2_unblock()
677 * are currently serialized against each other.
678 * And a wrong result in sbp2_conditionally_block()'s access of
679 * dont_block is rather harmless, it simply misses its first chance.
680 */
681 --lu->tgt->dont_block;
682}
683
684/*
685 * Blocks lu->tgt if all of the following conditions are met:
686 * - Login, INQUIRY, and high-level SCSI setup of all of the target's
687 * logical units have been finished (indicated by dont_block == 0).
688 * - lu->generation is stale.
689 *
690 * Note, scsi_block_requests() must be called while holding card->lock,
691 * otherwise it might foil sbp2_[conditionally_]unblock()'s attempt to
692 * unblock the target.
693 */
694static void sbp2_conditionally_block(struct sbp2_logical_unit *lu)
695{
696 struct sbp2_target *tgt = lu->tgt;
697 struct fw_card *card = fw_device(tgt->unit->device.parent)->card;
698 struct Scsi_Host *shost =
699 container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
700 unsigned long flags;
701
702 spin_lock_irqsave(&card->lock, flags);
703 if (!tgt->dont_block && !lu->blocked &&
704 lu->generation != card->generation) {
705 lu->blocked = true;
Stefan Richtera5fd9ec2008-02-28 20:53:45 +0100706 if (++tgt->blocked == 1)
Stefan Richter2e2705b2008-02-16 16:37:28 +0100707 scsi_block_requests(shost);
Stefan Richter2e2705b2008-02-16 16:37:28 +0100708 }
709 spin_unlock_irqrestore(&card->lock, flags);
710}
711
712/*
713 * Unblocks lu->tgt as soon as all its logical units can be unblocked.
714 * Note, it is harmless to run scsi_unblock_requests() outside the
715 * card->lock protected section. On the other hand, running it inside
716 * the section might clash with shost->host_lock.
717 */
718static void sbp2_conditionally_unblock(struct sbp2_logical_unit *lu)
719{
720 struct sbp2_target *tgt = lu->tgt;
721 struct fw_card *card = fw_device(tgt->unit->device.parent)->card;
722 struct Scsi_Host *shost =
723 container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
724 unsigned long flags;
725 bool unblock = false;
726
727 spin_lock_irqsave(&card->lock, flags);
728 if (lu->blocked && lu->generation == card->generation) {
729 lu->blocked = false;
730 unblock = --tgt->blocked == 0;
731 }
732 spin_unlock_irqrestore(&card->lock, flags);
733
Stefan Richtera5fd9ec2008-02-28 20:53:45 +0100734 if (unblock)
Stefan Richter2e2705b2008-02-16 16:37:28 +0100735 scsi_unblock_requests(shost);
Stefan Richter2e2705b2008-02-16 16:37:28 +0100736}
737
738/*
739 * Prevents future blocking of tgt and unblocks it.
740 * Note, it is harmless to run scsi_unblock_requests() outside the
741 * card->lock protected section. On the other hand, running it inside
742 * the section might clash with shost->host_lock.
743 */
744static void sbp2_unblock(struct sbp2_target *tgt)
745{
746 struct fw_card *card = fw_device(tgt->unit->device.parent)->card;
747 struct Scsi_Host *shost =
748 container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
749 unsigned long flags;
750
751 spin_lock_irqsave(&card->lock, flags);
752 ++tgt->dont_block;
753 spin_unlock_irqrestore(&card->lock, flags);
754
755 scsi_unblock_requests(shost);
756}
757
Stefan Richterf8436152008-02-26 23:30:02 +0100758static int sbp2_lun2int(u16 lun)
759{
760 struct scsi_lun eight_bytes_lun;
761
762 memset(&eight_bytes_lun, 0, sizeof(eight_bytes_lun));
763 eight_bytes_lun.scsi_lun[0] = (lun >> 8) & 0xff;
764 eight_bytes_lun.scsi_lun[1] = lun & 0xff;
765
766 return scsilun_to_int(&eight_bytes_lun);
767}
768
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200769static void sbp2_release_target(struct kref *kref)
Kristian Høgsbergb3d6e152007-03-14 17:34:58 -0400770{
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200771 struct sbp2_target *tgt = container_of(kref, struct sbp2_target, kref);
772 struct sbp2_logical_unit *lu, *next;
773 struct Scsi_Host *shost =
774 container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
Stefan Richterf8436152008-02-26 23:30:02 +0100775 struct scsi_device *sdev;
Stefan Richter855c6032008-02-27 22:14:27 +0100776 struct fw_device *device = fw_device(tgt->unit->device.parent);
Kristian Høgsbergb3d6e152007-03-14 17:34:58 -0400777
Stefan Richter2e2705b2008-02-16 16:37:28 +0100778 /* prevent deadlocks */
779 sbp2_unblock(tgt);
780
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200781 list_for_each_entry_safe(lu, next, &tgt->lu_list, link) {
Stefan Richterf8436152008-02-26 23:30:02 +0100782 sdev = scsi_device_lookup(shost, 0, 0, sbp2_lun2int(lu->lun));
783 if (sdev) {
784 scsi_remove_device(sdev);
785 scsi_device_put(sdev);
Stefan Richter33f1c6c2008-02-19 09:05:49 +0100786 }
Jay Fenlasoncd1f70fd2008-10-24 15:26:20 -0400787 if (lu->login_id != INVALID_LOGIN_ID) {
788 int generation, node_id;
789 /*
790 * tgt->node_id may be obsolete here if we failed
791 * during initial login or after a bus reset where
792 * the topology changed.
793 */
794 generation = device->generation;
795 smp_rmb(); /* node_id vs. generation */
796 node_id = device->node_id;
797 sbp2_send_management_orb(lu, node_id, generation,
798 SBP2_LOGOUT_REQUEST,
799 lu->login_id, NULL);
800 }
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200801 fw_core_remove_address_handler(&lu->address_handler);
802 list_del(&lu->link);
803 kfree(lu);
804 }
805 scsi_remove_host(shost);
Stefan Richterf32ddad2008-04-24 23:17:47 +0200806 fw_notify("released %s, target %d:0:0\n", tgt->bus_id, shost->host_no);
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200807
Stefan Richter1dc3bea2008-02-24 19:01:21 +0100808 fw_unit_put(tgt->unit);
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200809 scsi_host_put(shost);
Stefan Richter855c6032008-02-27 22:14:27 +0100810 fw_device_put(device);
Kristian Høgsbergb3d6e152007-03-14 17:34:58 -0400811}
812
Stefan Richterdf8ec242007-08-12 12:51:18 +0200813static struct workqueue_struct *sbp2_wq;
814
Jay Fenlasoncd1f70fd2008-10-24 15:26:20 -0400815static void sbp2_target_put(struct sbp2_target *tgt)
816{
817 kref_put(&tgt->kref, sbp2_release_target);
818}
819
Stefan Richter285838e2007-11-07 01:12:51 +0100820/*
821 * Always get the target's kref when scheduling work on one its units.
822 * Each workqueue job is responsible to call sbp2_target_put() upon return.
823 */
824static void sbp2_queue_work(struct sbp2_logical_unit *lu, unsigned long delay)
825{
Jay Fenlasoncd1f70fd2008-10-24 15:26:20 -0400826 kref_get(&lu->tgt->kref);
827 if (!queue_delayed_work(sbp2_wq, &lu->work, delay))
828 sbp2_target_put(lu->tgt);
Stefan Richter285838e2007-11-07 01:12:51 +0100829}
830
Jarod Wilson17cff9f2008-03-07 01:43:31 -0500831/*
832 * Write retransmit retry values into the BUSY_TIMEOUT register.
833 * - The single-phase retry protocol is supported by all SBP-2 devices, but the
834 * default retry_limit value is 0 (i.e. never retry transmission). We write a
835 * saner value after logging into the device.
836 * - The dual-phase retry protocol is optional to implement, and if not
837 * supported, writes to the dual-phase portion of the register will be
838 * ignored. We try to write the original 1394-1995 default here.
839 * - In the case of devices that are also SBP-3-compliant, all writes are
840 * ignored, as the register is read-only, but contains single-phase retry of
841 * 15, which is what we're trying to set for all SBP-2 device anyway, so this
842 * write attempt is safe and yields more consistent behavior for all devices.
843 *
844 * See section 8.3.2.3.5 of the 1394-1995 spec, section 6.2 of the SBP-2 spec,
845 * and section 6.4 of the SBP-3 spec for further details.
846 */
Jarod Wilson51f9dbe2008-03-07 01:43:01 -0500847static void sbp2_set_busy_timeout(struct sbp2_logical_unit *lu)
848{
849 struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
Jay Fenlason1e119fa2008-07-20 14:20:53 +0200850 __be32 d = cpu_to_be32(SBP2_CYCLE_LIMIT | SBP2_RETRY_LIMIT);
Jarod Wilson51f9dbe2008-03-07 01:43:01 -0500851
Jay Fenlason1e119fa2008-07-20 14:20:53 +0200852 fw_run_transaction(device->card, TCODE_WRITE_QUADLET_REQUEST,
853 lu->tgt->node_id, lu->generation, device->max_speed,
854 CSR_REGISTER_BASE + CSR_BUSY_TIMEOUT,
855 &d, sizeof(d));
Jarod Wilson51f9dbe2008-03-07 01:43:01 -0500856}
857
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200858static void sbp2_reconnect(struct work_struct *work);
859
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500860static void sbp2_login(struct work_struct *work)
861{
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200862 struct sbp2_logical_unit *lu =
863 container_of(work, struct sbp2_logical_unit, work.work);
Stefan Richter48f18c72008-02-03 23:09:50 +0100864 struct sbp2_target *tgt = lu->tgt;
865 struct fw_device *device = fw_device(tgt->unit->device.parent);
866 struct Scsi_Host *shost;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200867 struct scsi_device *sdev;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500868 struct sbp2_login_response response;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200869 int generation, node_id, local_node_id;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500870
Stefan Richterbe6f48b2008-01-27 19:14:44 +0100871 if (fw_device_is_shutdown(device))
872 goto out;
873
Stefan Richter5a8a1bc2008-01-24 01:53:19 +0100874 generation = device->generation;
Stefan Richter621f6dd2008-10-26 11:04:20 +0100875 smp_rmb(); /* node IDs must not be older than generation */
Stefan Richter5a8a1bc2008-01-24 01:53:19 +0100876 node_id = device->node_id;
877 local_node_id = device->card->node_id;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500878
Stefan Richterce896d92008-02-03 23:11:39 +0100879 /* If this is a re-login attempt, log out, or we might be rejected. */
Stefan Richterf8436152008-02-26 23:30:02 +0100880 if (lu->has_sdev)
Stefan Richterce896d92008-02-03 23:11:39 +0100881 sbp2_send_management_orb(lu, device->node_id, generation,
882 SBP2_LOGOUT_REQUEST, lu->login_id, NULL);
883
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200884 if (sbp2_send_management_orb(lu, node_id, generation,
885 SBP2_LOGIN_REQUEST, lu->lun, &response) < 0) {
Stefan Richter2e2705b2008-02-16 16:37:28 +0100886 if (lu->retries++ < 5) {
Stefan Richter285838e2007-11-07 01:12:51 +0100887 sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5));
Stefan Richter2e2705b2008-02-16 16:37:28 +0100888 } else {
Stefan Richter48f18c72008-02-03 23:09:50 +0100889 fw_error("%s: failed to login to LUN %04x\n",
890 tgt->bus_id, lu->lun);
Stefan Richter2e2705b2008-02-16 16:37:28 +0100891 /* Let any waiting I/O fail from now on. */
892 sbp2_unblock(lu->tgt);
893 }
Stefan Richter285838e2007-11-07 01:12:51 +0100894 goto out;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500895 }
896
Stefan Richter48f18c72008-02-03 23:09:50 +0100897 tgt->node_id = node_id;
898 tgt->address_high = local_node_id << 16;
Stefan Richter621f6dd2008-10-26 11:04:20 +0100899 smp_wmb(); /* node IDs must not be older than generation */
900 lu->generation = generation;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500901
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200902 lu->command_block_agent_address =
Stefan Richter71ee9f02008-02-28 20:51:11 +0100903 ((u64)(be32_to_cpu(response.command_block_agent.high) & 0xffff)
904 << 32) | be32_to_cpu(response.command_block_agent.low);
905 lu->login_id = be32_to_cpu(response.misc) & 0xffff;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500906
Stefan Richter48f18c72008-02-03 23:09:50 +0100907 fw_notify("%s: logged in to LUN %04x (%d retries)\n",
908 tgt->bus_id, lu->lun, lu->retries);
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500909
Jarod Wilson51f9dbe2008-03-07 01:43:01 -0500910 /* set appropriate retry limit(s) in BUSY_TIMEOUT register */
911 sbp2_set_busy_timeout(lu);
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500912
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200913 PREPARE_DELAYED_WORK(&lu->work, sbp2_reconnect);
914 sbp2_agent_reset(lu);
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500915
Stefan Richter0fa6dfd2008-02-03 23:10:47 +0100916 /* This was a re-login. */
Stefan Richterf8436152008-02-26 23:30:02 +0100917 if (lu->has_sdev) {
Stefan Richter0fa6dfd2008-02-03 23:10:47 +0100918 sbp2_cancel_orbs(lu);
Stefan Richter2e2705b2008-02-16 16:37:28 +0100919 sbp2_conditionally_unblock(lu);
Stefan Richter0fa6dfd2008-02-03 23:10:47 +0100920 goto out;
921 }
922
Stefan Richter9220f192008-02-03 23:04:38 +0100923 if (lu->tgt->workarounds & SBP2_WORKAROUND_DELAY_INQUIRY)
924 ssleep(SBP2_INQUIRY_DELAY);
925
Stefan Richter48f18c72008-02-03 23:09:50 +0100926 shost = container_of((void *)tgt, struct Scsi_Host, hostdata[0]);
Stefan Richterf8436152008-02-26 23:30:02 +0100927 sdev = __scsi_add_device(shost, 0, 0, sbp2_lun2int(lu->lun), lu);
Stefan Richtere80de372008-02-15 21:29:02 +0100928 /*
929 * FIXME: We are unable to perform reconnects while in sbp2_login().
930 * Therefore __scsi_add_device() will get into trouble if a bus reset
931 * happens in parallel. It will either fail or leave us with an
932 * unusable sdev. As a workaround we check for this and retry the
933 * whole login and SCSI probing.
934 */
Stefan Richter1b9c12b2008-01-26 17:43:23 +0100935
Stefan Richtere80de372008-02-15 21:29:02 +0100936 /* Reported error during __scsi_add_device() */
937 if (IS_ERR(sdev))
938 goto out_logout_login;
939
Stefan Richtere80de372008-02-15 21:29:02 +0100940 /* Unreported error during __scsi_add_device() */
941 smp_rmb(); /* get current card generation */
942 if (generation != device->card->generation) {
943 scsi_remove_device(sdev);
Stefan Richter33f1c6c2008-02-19 09:05:49 +0100944 scsi_device_put(sdev);
Stefan Richtere80de372008-02-15 21:29:02 +0100945 goto out_logout_login;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500946 }
Stefan Richtere80de372008-02-15 21:29:02 +0100947
948 /* No error during __scsi_add_device() */
Stefan Richterf8436152008-02-26 23:30:02 +0100949 lu->has_sdev = true;
950 scsi_device_put(sdev);
Stefan Richter2e2705b2008-02-16 16:37:28 +0100951 sbp2_allow_block(lu);
Stefan Richtere80de372008-02-15 21:29:02 +0100952 goto out;
953
954 out_logout_login:
955 smp_rmb(); /* generation may have changed */
956 generation = device->generation;
957 smp_rmb(); /* node_id must not be older than generation */
958
959 sbp2_send_management_orb(lu, device->node_id, generation,
960 SBP2_LOGOUT_REQUEST, lu->login_id, NULL);
961 /*
962 * If a bus reset happened, sbp2_update will have requeued
963 * lu->work already. Reset the work from reconnect to login.
964 */
965 PREPARE_DELAYED_WORK(&lu->work, sbp2_login);
Stefan Richter285838e2007-11-07 01:12:51 +0100966 out:
Stefan Richter48f18c72008-02-03 23:09:50 +0100967 sbp2_target_put(tgt);
Kristian Høgsberg7f37c422007-02-06 14:49:34 -0500968}
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -0500969
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200970static int sbp2_add_logical_unit(struct sbp2_target *tgt, int lun_entry)
971{
972 struct sbp2_logical_unit *lu;
973
974 lu = kmalloc(sizeof(*lu), GFP_KERNEL);
975 if (!lu)
976 return -ENOMEM;
977
978 lu->address_handler.length = 0x100;
979 lu->address_handler.address_callback = sbp2_status_write;
980 lu->address_handler.callback_data = lu;
981
982 if (fw_core_add_address_handler(&lu->address_handler,
983 &fw_high_memory_region) < 0) {
984 kfree(lu);
985 return -ENOMEM;
986 }
987
Stefan Richterf8436152008-02-26 23:30:02 +0100988 lu->tgt = tgt;
989 lu->lun = lun_entry & 0xffff;
Jay Fenlasoncd1f70fd2008-10-24 15:26:20 -0400990 lu->login_id = INVALID_LOGIN_ID;
Stefan Richterf8436152008-02-26 23:30:02 +0100991 lu->retries = 0;
992 lu->has_sdev = false;
993 lu->blocked = false;
Stefan Richter2e2705b2008-02-16 16:37:28 +0100994 ++tgt->dont_block;
Stefan Richter5a3c2be2007-08-25 14:05:28 +0200995 INIT_LIST_HEAD(&lu->orb_list);
996 INIT_DELAYED_WORK(&lu->work, sbp2_login);
997
998 list_add_tail(&lu->link, &tgt->lu_list);
999 return 0;
1000}
1001
1002static int sbp2_scan_logical_unit_dir(struct sbp2_target *tgt, u32 *directory)
1003{
1004 struct fw_csr_iterator ci;
1005 int key, value;
1006
1007 fw_csr_iterator_init(&ci, directory);
1008 while (fw_csr_iterator_next(&ci, &key, &value))
1009 if (key == SBP2_CSR_LOGICAL_UNIT_NUMBER &&
1010 sbp2_add_logical_unit(tgt, value) < 0)
1011 return -ENOMEM;
1012 return 0;
1013}
1014
1015static int sbp2_scan_unit_dir(struct sbp2_target *tgt, u32 *directory,
1016 u32 *model, u32 *firmware_revision)
1017{
1018 struct fw_csr_iterator ci;
1019 int key, value;
Jarod Wilson384170d2008-01-25 23:31:12 -05001020 unsigned int timeout;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001021
1022 fw_csr_iterator_init(&ci, directory);
1023 while (fw_csr_iterator_next(&ci, &key, &value)) {
1024 switch (key) {
1025
1026 case CSR_DEPENDENT_INFO | CSR_OFFSET:
1027 tgt->management_agent_address =
1028 CSR_REGISTER_BASE + 4 * value;
1029 break;
1030
1031 case CSR_DIRECTORY_ID:
1032 tgt->directory_id = value;
1033 break;
1034
1035 case CSR_MODEL:
1036 *model = value;
1037 break;
1038
1039 case SBP2_CSR_FIRMWARE_REVISION:
1040 *firmware_revision = value;
1041 break;
1042
Jarod Wilson384170d2008-01-25 23:31:12 -05001043 case SBP2_CSR_UNIT_CHARACTERISTICS:
1044 /* the timeout value is stored in 500ms units */
1045 timeout = ((unsigned int) value >> 8 & 0xff) * 500;
1046 timeout = max(timeout, SBP2_MIN_LOGIN_ORB_TIMEOUT);
1047 tgt->mgt_orb_timeout =
1048 min(timeout, SBP2_MAX_LOGIN_ORB_TIMEOUT);
1049
1050 if (timeout > tgt->mgt_orb_timeout)
1051 fw_notify("%s: config rom contains %ds "
1052 "management ORB timeout, limiting "
Stefan Richter48f18c72008-02-03 23:09:50 +01001053 "to %ds\n", tgt->bus_id,
Jarod Wilson384170d2008-01-25 23:31:12 -05001054 timeout / 1000,
1055 tgt->mgt_orb_timeout / 1000);
1056 break;
1057
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001058 case SBP2_CSR_LOGICAL_UNIT_NUMBER:
1059 if (sbp2_add_logical_unit(tgt, value) < 0)
1060 return -ENOMEM;
1061 break;
1062
1063 case SBP2_CSR_LOGICAL_UNIT_DIRECTORY:
Richard Sharpe0e3e2ea2008-06-24 19:11:13 -07001064 /* Adjust for the increment in the iterator */
1065 if (sbp2_scan_logical_unit_dir(tgt, ci.p - 1 + value) < 0)
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001066 return -ENOMEM;
1067 break;
1068 }
1069 }
1070 return 0;
1071}
1072
1073static void sbp2_init_workarounds(struct sbp2_target *tgt, u32 model,
1074 u32 firmware_revision)
1075{
1076 int i;
Stefan Richter05cca732008-01-26 17:42:45 +01001077 unsigned int w = sbp2_param_workarounds;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001078
Stefan Richter2df222b2007-08-13 17:48:25 +02001079 if (w)
1080 fw_notify("Please notify linux1394-devel@lists.sourceforge.net "
1081 "if you need the workarounds parameter for %s\n",
Stefan Richter48f18c72008-02-03 23:09:50 +01001082 tgt->bus_id);
Stefan Richter2df222b2007-08-13 17:48:25 +02001083
1084 if (w & SBP2_WORKAROUND_OVERRIDE)
1085 goto out;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001086
1087 for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) {
1088
1089 if (sbp2_workarounds_table[i].firmware_revision !=
1090 (firmware_revision & 0xffffff00))
1091 continue;
1092
1093 if (sbp2_workarounds_table[i].model != model &&
Stefan Richterf7460722009-01-24 19:41:46 +01001094 sbp2_workarounds_table[i].model != SBP2_ROM_VALUE_WILDCARD)
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001095 continue;
1096
Stefan Richter2df222b2007-08-13 17:48:25 +02001097 w |= sbp2_workarounds_table[i].workarounds;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001098 break;
1099 }
Stefan Richter2df222b2007-08-13 17:48:25 +02001100 out:
1101 if (w)
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001102 fw_notify("Workarounds for %s: 0x%x "
1103 "(firmware_revision 0x%06x, model_id 0x%06x)\n",
Stefan Richter48f18c72008-02-03 23:09:50 +01001104 tgt->bus_id, w, firmware_revision, model);
Stefan Richter2df222b2007-08-13 17:48:25 +02001105 tgt->workarounds = w;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001106}
1107
1108static struct scsi_host_template scsi_driver_template;
1109
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001110static int sbp2_probe(struct device *dev)
1111{
1112 struct fw_unit *unit = fw_unit(dev);
1113 struct fw_device *device = fw_device(unit->device.parent);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001114 struct sbp2_target *tgt;
1115 struct sbp2_logical_unit *lu;
1116 struct Scsi_Host *shost;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001117 u32 model, firmware_revision;
1118
Stefan Richter09b12dd2008-08-14 21:47:21 +02001119 if (dma_get_max_seg_size(device->card->device) > SBP2_MAX_SEG_SIZE)
1120 BUG_ON(dma_set_max_seg_size(device->card->device,
1121 SBP2_MAX_SEG_SIZE));
1122
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001123 shost = scsi_host_alloc(&scsi_driver_template, sizeof(*tgt));
1124 if (shost == NULL)
1125 return -ENOMEM;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001126
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001127 tgt = (struct sbp2_target *)shost->hostdata;
1128 unit->device.driver_data = tgt;
1129 tgt->unit = unit;
1130 kref_init(&tgt->kref);
1131 INIT_LIST_HEAD(&tgt->lu_list);
Kay Sieversa1f64812008-10-30 01:41:56 +01001132 tgt->bus_id = dev_name(&unit->device);
Stefan Richterc9755e12008-03-24 20:54:28 +01001133 tgt->guid = (u64)device->config_rom[3] << 32 | device->config_rom[4];
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001134
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001135 if (fw_device_enable_phys_dma(device) < 0)
1136 goto fail_shost_put;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001137
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001138 if (scsi_add_host(shost, &unit->device) < 0)
1139 goto fail_shost_put;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001140
Stefan Richter855c6032008-02-27 22:14:27 +01001141 fw_device_get(device);
Stefan Richter1dc3bea2008-02-24 19:01:21 +01001142 fw_unit_get(unit);
Stefan Richter855c6032008-02-27 22:14:27 +01001143
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001144 /* implicit directory ID */
1145 tgt->directory_id = ((unit->directory - device->config_rom) * 4
1146 + CSR_CONFIG_ROM) & 0xffffff;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001147
Stefan Richterf7460722009-01-24 19:41:46 +01001148 firmware_revision = SBP2_ROM_VALUE_MISSING;
1149 model = SBP2_ROM_VALUE_MISSING;
1150
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001151 if (sbp2_scan_unit_dir(tgt, unit->directory, &model,
1152 &firmware_revision) < 0)
1153 goto fail_tgt_put;
1154
1155 sbp2_init_workarounds(tgt, model, firmware_revision);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001156
Stefan Richtera08e1002009-01-24 19:41:46 +01001157 /*
1158 * At S100 we can do 512 bytes per packet, at S200 1024 bytes,
1159 * and so on up to 4096 bytes. The SBP-2 max_payload field
1160 * specifies the max payload size as 2 ^ (max_payload + 2), so
1161 * if we set this to max_speed + 7, we get the right value.
1162 */
1163 tgt->max_payload = min(device->max_speed + 7, 10U);
1164 tgt->max_payload = min(tgt->max_payload, device->card->max_receive - 1);
1165
Stefan Richter285838e2007-11-07 01:12:51 +01001166 /* Do the login in a workqueue so we can easily reschedule retries. */
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001167 list_for_each_entry(lu, &tgt->lu_list, link)
Stefan Richter0dcfeb72008-10-22 00:28:36 +02001168 sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001169 return 0;
Kristian Høgsbergad852742007-05-09 19:23:07 -04001170
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001171 fail_tgt_put:
Stefan Richter285838e2007-11-07 01:12:51 +01001172 sbp2_target_put(tgt);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001173 return -ENOMEM;
1174
1175 fail_shost_put:
1176 scsi_host_put(shost);
1177 return -ENOMEM;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001178}
1179
1180static int sbp2_remove(struct device *dev)
1181{
1182 struct fw_unit *unit = fw_unit(dev);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001183 struct sbp2_target *tgt = unit->device.driver_data;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001184
Stefan Richter285838e2007-11-07 01:12:51 +01001185 sbp2_target_put(tgt);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001186 return 0;
1187}
1188
1189static void sbp2_reconnect(struct work_struct *work)
1190{
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001191 struct sbp2_logical_unit *lu =
1192 container_of(work, struct sbp2_logical_unit, work.work);
Stefan Richter48f18c72008-02-03 23:09:50 +01001193 struct sbp2_target *tgt = lu->tgt;
1194 struct fw_device *device = fw_device(tgt->unit->device.parent);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001195 int generation, node_id, local_node_id;
1196
Stefan Richterbe6f48b2008-01-27 19:14:44 +01001197 if (fw_device_is_shutdown(device))
1198 goto out;
1199
Stefan Richter5a8a1bc2008-01-24 01:53:19 +01001200 generation = device->generation;
Stefan Richter621f6dd2008-10-26 11:04:20 +01001201 smp_rmb(); /* node IDs must not be older than generation */
Stefan Richter5a8a1bc2008-01-24 01:53:19 +01001202 node_id = device->node_id;
1203 local_node_id = device->card->node_id;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001204
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001205 if (sbp2_send_management_orb(lu, node_id, generation,
Kristian Høgsberg7f37c422007-02-06 14:49:34 -05001206 SBP2_RECONNECT_REQUEST,
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001207 lu->login_id, NULL) < 0) {
Stefan Richterce896d92008-02-03 23:11:39 +01001208 /*
1209 * If reconnect was impossible even though we are in the
1210 * current generation, fall back and try to log in again.
1211 *
1212 * We could check for "Function rejected" status, but
1213 * looking at the bus generation as simpler and more general.
1214 */
1215 smp_rmb(); /* get current card generation */
1216 if (generation == device->card->generation ||
1217 lu->retries++ >= 5) {
Stefan Richter48f18c72008-02-03 23:09:50 +01001218 fw_error("%s: failed to reconnect\n", tgt->bus_id);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001219 lu->retries = 0;
1220 PREPARE_DELAYED_WORK(&lu->work, sbp2_login);
Kristian Høgsberg7f37c422007-02-06 14:49:34 -05001221 }
Stefan Richter285838e2007-11-07 01:12:51 +01001222 sbp2_queue_work(lu, DIV_ROUND_UP(HZ, 5));
1223 goto out;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -05001224 }
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001225
Stefan Richter48f18c72008-02-03 23:09:50 +01001226 tgt->node_id = node_id;
1227 tgt->address_high = local_node_id << 16;
Stefan Richter621f6dd2008-10-26 11:04:20 +01001228 smp_wmb(); /* node IDs must not be older than generation */
1229 lu->generation = generation;
Kristian Høgsberg7f37c422007-02-06 14:49:34 -05001230
Stefan Richter48f18c72008-02-03 23:09:50 +01001231 fw_notify("%s: reconnected to LUN %04x (%d retries)\n",
1232 tgt->bus_id, lu->lun, lu->retries);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001233
1234 sbp2_agent_reset(lu);
1235 sbp2_cancel_orbs(lu);
Stefan Richter2e2705b2008-02-16 16:37:28 +01001236 sbp2_conditionally_unblock(lu);
Stefan Richter285838e2007-11-07 01:12:51 +01001237 out:
Stefan Richter48f18c72008-02-03 23:09:50 +01001238 sbp2_target_put(tgt);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001239}
1240
1241static void sbp2_update(struct fw_unit *unit)
1242{
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001243 struct sbp2_target *tgt = unit->device.driver_data;
1244 struct sbp2_logical_unit *lu;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001245
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001246 fw_device_enable_phys_dma(fw_device(unit->device.parent));
1247
1248 /*
1249 * Fw-core serializes sbp2_update() against sbp2_remove().
1250 * Iteration over tgt->lu_list is therefore safe here.
1251 */
1252 list_for_each_entry(lu, &tgt->lu_list, link) {
Stefan Richter2e2705b2008-02-16 16:37:28 +01001253 sbp2_conditionally_block(lu);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001254 lu->retries = 0;
Stefan Richter285838e2007-11-07 01:12:51 +01001255 sbp2_queue_work(lu, 0);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001256 }
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001257}
1258
1259#define SBP2_UNIT_SPEC_ID_ENTRY 0x0000609e
1260#define SBP2_SW_VERSION_ENTRY 0x00010483
1261
Stefan Richter21ebcd12007-01-14 15:29:07 +01001262static const struct fw_device_id sbp2_id_table[] = {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001263 {
1264 .match_flags = FW_MATCH_SPECIFIER_ID | FW_MATCH_VERSION,
1265 .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY,
Stefan Richter5af4e5e2007-01-21 20:45:32 +01001266 .version = SBP2_SW_VERSION_ENTRY,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001267 },
1268 { }
1269};
1270
1271static struct fw_driver sbp2_driver = {
1272 .driver = {
1273 .owner = THIS_MODULE,
1274 .name = sbp2_driver_name,
1275 .bus = &fw_bus_type,
1276 .probe = sbp2_probe,
1277 .remove = sbp2_remove,
1278 },
1279 .update = sbp2_update,
1280 .id_table = sbp2_id_table,
1281};
1282
Stefan Richter5e212562009-01-28 01:03:34 +01001283static void sbp2_unmap_scatterlist(struct device *card_device,
1284 struct sbp2_command_orb *orb)
1285{
1286 if (scsi_sg_count(orb->cmd))
1287 dma_unmap_sg(card_device, scsi_sglist(orb->cmd),
1288 scsi_sg_count(orb->cmd),
1289 orb->cmd->sc_data_direction);
1290
1291 if (orb->request.misc & cpu_to_be32(COMMAND_ORB_PAGE_TABLE_PRESENT))
1292 dma_unmap_single(card_device, orb->page_table_bus,
1293 sizeof(orb->page_table), DMA_TO_DEVICE);
1294}
1295
Stefan Richter53dca512008-12-14 21:47:04 +01001296static unsigned int sbp2_status_to_sense_data(u8 *sbp2_status, u8 *sense_data)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001297{
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001298 int sam_status;
1299
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001300 sense_data[0] = 0x70;
1301 sense_data[1] = 0x0;
1302 sense_data[2] = sbp2_status[1];
1303 sense_data[3] = sbp2_status[4];
1304 sense_data[4] = sbp2_status[5];
1305 sense_data[5] = sbp2_status[6];
1306 sense_data[6] = sbp2_status[7];
1307 sense_data[7] = 10;
1308 sense_data[8] = sbp2_status[8];
1309 sense_data[9] = sbp2_status[9];
1310 sense_data[10] = sbp2_status[10];
1311 sense_data[11] = sbp2_status[11];
1312 sense_data[12] = sbp2_status[2];
1313 sense_data[13] = sbp2_status[3];
1314 sense_data[14] = sbp2_status[12];
1315 sense_data[15] = sbp2_status[13];
1316
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001317 sam_status = sbp2_status[0] & 0x3f;
1318
1319 switch (sam_status) {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001320 case SAM_STAT_GOOD:
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001321 case SAM_STAT_CHECK_CONDITION:
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001322 case SAM_STAT_CONDITION_MET:
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001323 case SAM_STAT_BUSY:
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001324 case SAM_STAT_RESERVATION_CONFLICT:
1325 case SAM_STAT_COMMAND_TERMINATED:
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001326 return DID_OK << 16 | sam_status;
1327
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001328 default:
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001329 return DID_ERROR << 16;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001330 }
1331}
1332
Stefan Richter53dca512008-12-14 21:47:04 +01001333static void complete_command_orb(struct sbp2_orb *base_orb,
1334 struct sbp2_status *status)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001335{
Jay Fenlason6f061482007-06-27 16:04:33 -04001336 struct sbp2_command_orb *orb =
1337 container_of(base_orb, struct sbp2_command_orb, base);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001338 struct fw_device *device = fw_device(orb->lu->tgt->unit->device.parent);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001339 int result;
1340
1341 if (status != NULL) {
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001342 if (STATUS_GET_DEAD(*status))
Stefan Richtere0e60212008-02-03 23:08:58 +01001343 sbp2_agent_reset_no_wait(orb->lu);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001344
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001345 switch (STATUS_GET_RESPONSE(*status)) {
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001346 case SBP2_STATUS_REQUEST_COMPLETE:
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001347 result = DID_OK << 16;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001348 break;
1349 case SBP2_STATUS_TRANSPORT_FAILURE:
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001350 result = DID_BUS_BUSY << 16;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001351 break;
1352 case SBP2_STATUS_ILLEGAL_REQUEST:
1353 case SBP2_STATUS_VENDOR_DEPENDENT:
1354 default:
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001355 result = DID_ERROR << 16;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001356 break;
1357 }
1358
Kristian Høgsberga77754a2007-05-07 20:33:35 -04001359 if (result == DID_OK << 16 && STATUS_GET_LEN(*status) > 1)
1360 result = sbp2_status_to_sense_data(STATUS_GET_DATA(*status),
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001361 orb->cmd->sense_buffer);
1362 } else {
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001363 /*
1364 * If the orb completes with status == NULL, something
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001365 * went wrong, typically a bus reset happened mid-orb
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001366 * or when sending the write (less likely).
1367 */
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001368 result = DID_BUS_BUSY << 16;
Stefan Richter2e2705b2008-02-16 16:37:28 +01001369 sbp2_conditionally_block(orb->lu);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001370 }
1371
1372 dma_unmap_single(device->card->device, orb->base.request_bus,
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -04001373 sizeof(orb->request), DMA_TO_DEVICE);
Stefan Richter5e212562009-01-28 01:03:34 +01001374 sbp2_unmap_scatterlist(device->card->device, orb);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001375
Kristian Høgsbergfbb54232007-04-10 18:11:18 -04001376 orb->cmd->result = result;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001377 orb->done(orb->cmd);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001378}
1379
Stefan Richter53dca512008-12-14 21:47:04 +01001380static int sbp2_map_scatterlist(struct sbp2_command_orb *orb,
1381 struct fw_device *device, struct sbp2_logical_unit *lu)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001382{
Stefan Richter09b12dd2008-08-14 21:47:21 +02001383 struct scatterlist *sg = scsi_sglist(orb->cmd);
1384 int i, n;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001385
Stefan Richter09b12dd2008-08-14 21:47:21 +02001386 n = dma_map_sg(device->card->device, sg, scsi_sg_count(orb->cmd),
1387 orb->cmd->sc_data_direction);
1388 if (n == 0)
Kristian Høgsberg95ffc5e2007-05-09 19:23:08 -04001389 goto fail;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001390
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001391 /*
1392 * Handle the special case where there is only one element in
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001393 * the scatter list by converting it to an immediate block
1394 * request. This is also a workaround for broken devices such
1395 * as the second generation iPod which doesn't support page
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001396 * tables.
1397 */
Stefan Richter09b12dd2008-08-14 21:47:21 +02001398 if (n == 1) {
Stefan Richter71ee9f02008-02-28 20:51:11 +01001399 orb->request.data_descriptor.high =
1400 cpu_to_be32(lu->tgt->address_high);
1401 orb->request.data_descriptor.low =
1402 cpu_to_be32(sg_dma_address(sg));
1403 orb->request.misc |=
1404 cpu_to_be32(COMMAND_ORB_DATA_SIZE(sg_dma_len(sg)));
Kristian Høgsberg95ffc5e2007-05-09 19:23:08 -04001405 return 0;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001406 }
1407
Stefan Richter09b12dd2008-08-14 21:47:21 +02001408 for_each_sg(sg, sg, n, i) {
1409 orb->page_table[i].high = cpu_to_be32(sg_dma_len(sg) << 16);
1410 orb->page_table[i].low = cpu_to_be32(sg_dma_address(sg));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001411 }
1412
Stefan Richterb4be0162007-07-02 22:07:34 +02001413 orb->page_table_bus =
1414 dma_map_single(device->card->device, orb->page_table,
1415 sizeof(orb->page_table), DMA_TO_DEVICE);
FUJITA Tomonori8d8bb392008-07-25 19:44:49 -07001416 if (dma_mapping_error(device->card->device, orb->page_table_bus))
Stefan Richterb4be0162007-07-02 22:07:34 +02001417 goto fail_page_table;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001418
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001419 /*
1420 * The data_descriptor pointer is the one case where we need
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001421 * to fill in the node ID part of the address. All other
1422 * pointers assume that the data referenced reside on the
1423 * initiator (i.e. us), but data_descriptor can refer to data
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001424 * on other nodes so we need to put our ID in descriptor.high.
1425 */
Stefan Richter71ee9f02008-02-28 20:51:11 +01001426 orb->request.data_descriptor.high = cpu_to_be32(lu->tgt->address_high);
1427 orb->request.data_descriptor.low = cpu_to_be32(orb->page_table_bus);
1428 orb->request.misc |= cpu_to_be32(COMMAND_ORB_PAGE_TABLE_PRESENT |
Stefan Richter09b12dd2008-08-14 21:47:21 +02001429 COMMAND_ORB_DATA_SIZE(n));
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001430
Kristian Høgsberg95ffc5e2007-05-09 19:23:08 -04001431 return 0;
1432
1433 fail_page_table:
Stefan Richter09b12dd2008-08-14 21:47:21 +02001434 dma_unmap_sg(device->card->device, scsi_sglist(orb->cmd),
1435 scsi_sg_count(orb->cmd), orb->cmd->sc_data_direction);
Kristian Høgsberg95ffc5e2007-05-09 19:23:08 -04001436 fail:
1437 return -ENOMEM;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001438}
1439
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001440/* SCSI stack integration */
1441
1442static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done)
1443{
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001444 struct sbp2_logical_unit *lu = cmd->device->hostdata;
1445 struct fw_device *device = fw_device(lu->tgt->unit->device.parent);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001446 struct sbp2_command_orb *orb;
Stefan Richter4bbc1bd2008-08-09 20:22:17 +02001447 int generation, retval = SCSI_MLQUEUE_HOST_BUSY;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001448
Kristian Høgsbergc781c062007-05-07 20:33:32 -04001449 /*
1450 * Bidirectional commands are not yet implemented, and unknown
1451 * transfer direction not handled.
1452 */
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001453 if (cmd->sc_data_direction == DMA_BIDIRECTIONAL) {
Stefan Richter8a8cea22007-06-09 19:26:22 +02001454 fw_error("Can't handle DMA_BIDIRECTIONAL, rejecting command\n");
Kristian Høgsberge1b68c42007-05-09 19:23:09 -04001455 cmd->result = DID_ERROR << 16;
1456 done(cmd);
1457 return 0;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001458 }
1459
Kristian Høgsberg2d826cc2007-05-09 19:23:14 -04001460 orb = kzalloc(sizeof(*orb), GFP_ATOMIC);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001461 if (orb == NULL) {
1462 fw_notify("failed to alloc orb\n");
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001463 return SCSI_MLQUEUE_HOST_BUSY;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001464 }
1465
Kristian Høgsberg12f26aa2007-04-10 18:11:20 -04001466 /* Initialize rcode to something not RCODE_COMPLETE. */
1467 orb->base.rcode = -1;
Kristian Høgsberge57d2012007-08-24 18:59:58 -04001468 kref_init(&orb->base.kref);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001469
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001470 orb->lu = lu;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001471 orb->done = done;
1472 orb->cmd = cmd;
1473
Stefan Richtera08e1002009-01-24 19:41:46 +01001474 orb->request.next.high = cpu_to_be32(SBP2_ORB_NULL);
Stefan Richter71ee9f02008-02-28 20:51:11 +01001475 orb->request.misc = cpu_to_be32(
Stefan Richtera08e1002009-01-24 19:41:46 +01001476 COMMAND_ORB_MAX_PAYLOAD(lu->tgt->max_payload) |
Stefan Richterf1397492007-06-10 21:31:36 +02001477 COMMAND_ORB_SPEED(device->max_speed) |
Stefan Richter71ee9f02008-02-28 20:51:11 +01001478 COMMAND_ORB_NOTIFY);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001479
1480 if (cmd->sc_data_direction == DMA_FROM_DEVICE)
Stefan Richter0d7dcbf2008-02-28 20:52:02 +01001481 orb->request.misc |= cpu_to_be32(COMMAND_ORB_DIRECTION);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001482
Stefan Richter4bbc1bd2008-08-09 20:22:17 +02001483 generation = device->generation;
1484 smp_rmb(); /* sbp2_map_scatterlist looks at tgt->address_high */
1485
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001486 if (scsi_sg_count(cmd) && sbp2_map_scatterlist(orb, device, lu) < 0)
1487 goto out;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001488
Boaz Harrosh64a87b22008-04-30 11:19:47 +03001489 memcpy(orb->request.command_block, cmd->cmnd, cmd->cmd_len);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001490
1491 orb->base.callback = complete_command_orb;
Stefan Richter85263922007-07-02 21:04:08 +02001492 orb->base.request_bus =
1493 dma_map_single(device->card->device, &orb->request,
1494 sizeof(orb->request), DMA_TO_DEVICE);
Stefan Richter5e212562009-01-28 01:03:34 +01001495 if (dma_mapping_error(device->card->device, orb->base.request_bus)) {
1496 sbp2_unmap_scatterlist(device->card->device, orb);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001497 goto out;
Stefan Richter5e212562009-01-28 01:03:34 +01001498 }
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001499
Stefan Richter4bbc1bd2008-08-09 20:22:17 +02001500 sbp2_send_orb(&orb->base, lu, lu->tgt->node_id, generation,
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001501 lu->command_block_agent_address + SBP2_ORB_POINTER);
1502 retval = 0;
1503 out:
Kristian Høgsberge57d2012007-08-24 18:59:58 -04001504 kref_put(&orb->base.kref, free_orb);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001505 return retval;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001506}
1507
Stefan Richtercfb01382007-01-23 21:20:08 +01001508static int sbp2_scsi_slave_alloc(struct scsi_device *sdev)
1509{
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001510 struct sbp2_logical_unit *lu = sdev->hostdata;
Stefan Richtercfb01382007-01-23 21:20:08 +01001511
Stefan Richter5513c5f2008-02-17 14:56:19 +01001512 /* (Re-)Adding logical units via the SCSI stack is not supported. */
1513 if (!lu)
1514 return -ENOSYS;
1515
Stefan Richtercfb01382007-01-23 21:20:08 +01001516 sdev->allow_restart = 1;
1517
Stefan Richter8ac3a472008-01-27 22:31:27 +01001518 /* SBP-2 requires quadlet alignment of the data buffers. */
1519 blk_queue_update_dma_alignment(sdev->request_queue, 4 - 1);
James Bottomley465ff312008-01-01 10:00:10 -06001520
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001521 if (lu->tgt->workarounds & SBP2_WORKAROUND_INQUIRY_36)
Stefan Richtercfb01382007-01-23 21:20:08 +01001522 sdev->inquiry_len = 36;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001523
Stefan Richtercfb01382007-01-23 21:20:08 +01001524 return 0;
1525}
1526
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001527static int sbp2_scsi_slave_configure(struct scsi_device *sdev)
1528{
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001529 struct sbp2_logical_unit *lu = sdev->hostdata;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001530
Stefan Richtercfb01382007-01-23 21:20:08 +01001531 sdev->use_10_for_rw = 1;
1532
Stefan Richter2635f962008-05-11 00:36:47 +02001533 if (sbp2_param_exclusive_login)
1534 sdev->manage_start_stop = 1;
1535
Stefan Richtercfb01382007-01-23 21:20:08 +01001536 if (sdev->type == TYPE_ROM)
1537 sdev->use_10_for_ms = 1;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001538
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001539 if (sdev->type == TYPE_DISK &&
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001540 lu->tgt->workarounds & SBP2_WORKAROUND_MODE_SENSE_8)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001541 sdev->skip_ms_page_8 = 1;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001542
1543 if (lu->tgt->workarounds & SBP2_WORKAROUND_FIX_CAPACITY)
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001544 sdev->fix_capacity = 1;
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001545
Stefan Richterffcaade2008-05-11 00:35:04 +02001546 if (lu->tgt->workarounds & SBP2_WORKAROUND_POWER_CONDITION)
1547 sdev->start_stop_pwr_cond = 1;
1548
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001549 if (lu->tgt->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS)
Stefan Richtercf47c7a2007-06-17 23:52:08 +02001550 blk_queue_max_sectors(sdev->request_queue, 128 * 1024 / 512);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001551
Stefan Richter09b12dd2008-08-14 21:47:21 +02001552 blk_queue_max_segment_size(sdev->request_queue, SBP2_MAX_SEG_SIZE);
1553
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001554 return 0;
1555}
1556
1557/*
1558 * Called by scsi stack when something has really gone wrong. Usually
1559 * called when a command has timed-out for some reason.
1560 */
1561static int sbp2_scsi_abort(struct scsi_cmnd *cmd)
1562{
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001563 struct sbp2_logical_unit *lu = cmd->device->hostdata;
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001564
Stefan Richter48f18c72008-02-03 23:09:50 +01001565 fw_notify("%s: sbp2_scsi_abort\n", lu->tgt->bus_id);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001566 sbp2_agent_reset(lu);
1567 sbp2_cancel_orbs(lu);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001568
1569 return SUCCESS;
1570}
1571
Stefan Richter14e21982007-05-27 13:18:27 +02001572/*
1573 * Format of /sys/bus/scsi/devices/.../ieee1394_id:
1574 * u64 EUI-64 : u24 directory_ID : u16 LUN (all printed in hexadecimal)
1575 *
1576 * This is the concatenation of target port identifier and logical unit
1577 * identifier as per SAM-2...SAM-4 annex A.
1578 */
Stefan Richter53dca512008-12-14 21:47:04 +01001579static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev,
1580 struct device_attribute *attr, char *buf)
Stefan Richter14e21982007-05-27 13:18:27 +02001581{
1582 struct scsi_device *sdev = to_scsi_device(dev);
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001583 struct sbp2_logical_unit *lu;
Stefan Richter14e21982007-05-27 13:18:27 +02001584
1585 if (!sdev)
1586 return 0;
Stefan Richter14e21982007-05-27 13:18:27 +02001587
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001588 lu = sdev->hostdata;
Stefan Richter14e21982007-05-27 13:18:27 +02001589
Stefan Richterc9755e12008-03-24 20:54:28 +01001590 return sprintf(buf, "%016llx:%06x:%04x\n",
1591 (unsigned long long)lu->tgt->guid,
Stefan Richter5a3c2be2007-08-25 14:05:28 +02001592 lu->tgt->directory_id, lu->lun);
Stefan Richter14e21982007-05-27 13:18:27 +02001593}
1594
1595static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL);
1596
1597static struct device_attribute *sbp2_scsi_sysfs_attrs[] = {
1598 &dev_attr_ieee1394_id,
1599 NULL
1600};
1601
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001602static struct scsi_host_template scsi_driver_template = {
1603 .module = THIS_MODULE,
1604 .name = "SBP-2 IEEE-1394",
Kristian Høgsbergb02b6bc2007-05-09 19:23:12 -04001605 .proc_name = sbp2_driver_name,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001606 .queuecommand = sbp2_scsi_queuecommand,
Stefan Richtercfb01382007-01-23 21:20:08 +01001607 .slave_alloc = sbp2_scsi_slave_alloc,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001608 .slave_configure = sbp2_scsi_slave_configure,
1609 .eh_abort_handler = sbp2_scsi_abort,
1610 .this_id = -1,
1611 .sg_tablesize = SG_ALL,
1612 .use_clustering = ENABLE_CLUSTERING,
Stefan Richter02af8e72007-01-21 20:50:11 +01001613 .cmd_per_lun = 1,
1614 .can_queue = 1,
Stefan Richter14e21982007-05-27 13:18:27 +02001615 .sdev_attrs = sbp2_scsi_sysfs_attrs,
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001616};
1617
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001618MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>");
1619MODULE_DESCRIPTION("SCSI over IEEE1394");
1620MODULE_LICENSE("GPL");
1621MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table);
1622
Olaf Hering1e4c7b02007-05-05 23:17:13 +02001623/* Provide a module alias so root-on-sbp2 initrds don't break. */
1624#ifndef CONFIG_IEEE1394_SBP2_MODULE
1625MODULE_ALIAS("sbp2");
1626#endif
1627
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001628static int __init sbp2_init(void)
1629{
Stefan Richterdf8ec242007-08-12 12:51:18 +02001630 sbp2_wq = create_singlethread_workqueue(KBUILD_MODNAME);
1631 if (!sbp2_wq)
1632 return -ENOMEM;
1633
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001634 return driver_register(&sbp2_driver.driver);
1635}
1636
1637static void __exit sbp2_cleanup(void)
1638{
1639 driver_unregister(&sbp2_driver.driver);
Stefan Richterdf8ec242007-08-12 12:51:18 +02001640 destroy_workqueue(sbp2_wq);
Kristian Høgsberg9ba136d2006-12-19 19:58:40 -05001641}
1642
1643module_init(sbp2_init);
1644module_exit(sbp2_cleanup);