blob: 1d6ad34355372f1c492d984e1c8b56f625d0acf6 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * sbp2.c - SBP-2 protocol driver for IEEE-1394
3 *
4 * Copyright (C) 2000 James Goodwin, Filanet Corporation (www.filanet.com)
5 * jamesg@filanet.com (JSG)
6 *
7 * Copyright (C) 2003 Ben Collins <bcollins@debian.org>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software Foundation,
21 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 */
23
24/*
25 * Brief Description:
26 *
27 * This driver implements the Serial Bus Protocol 2 (SBP-2) over IEEE-1394
28 * under Linux. The SBP-2 driver is implemented as an IEEE-1394 high-level
29 * driver. It also registers as a SCSI lower-level driver in order to accept
30 * SCSI commands for transport using SBP-2.
31 *
Stefan Richter2a533b12006-11-02 21:16:08 +010032 * You may access any attached SBP-2 (usually storage devices) as regular
33 * SCSI devices. E.g. mount /dev/sda1, fdisk, mkfs, etc..
Linus Torvalds1da177e2005-04-16 15:20:36 -070034 *
Stefan Richter2a533b12006-11-02 21:16:08 +010035 * See http://www.t10.org/drafts.htm#sbp2 for the final draft of the SBP-2
36 * specification and for where to purchase the official standard.
Linus Torvalds1da177e2005-04-16 15:20:36 -070037 *
Stefan Richter2a533b12006-11-02 21:16:08 +010038 * TODO:
39 * - look into possible improvements of the SCSI error handlers
40 * - handle Unit_Characteristics.mgt_ORB_timeout and .ORB_size
41 * - handle Logical_Unit_Number.ordered
42 * - handle src == 1 in status blocks
43 * - reimplement the DMA mapping in absence of physical DMA so that
44 * bus_to_virt is no longer required
45 * - debug the handling of absent physical DMA
46 * - replace CONFIG_IEEE1394_SBP2_PHYS_DMA by automatic detection
47 * (this is easy but depends on the previous two TODO items)
48 * - make the parameter serialize_io configurable per device
49 * - move all requests to fetch agent registers into non-atomic context,
50 * replace all usages of sbp2util_node_write_no_wait by true transactions
Stefan Richter2a533b12006-11-02 21:16:08 +010051 * Grep for inline FIXME comments below.
Linus Torvalds1da177e2005-04-16 15:20:36 -070052 */
53
Stefan Richter4e6343a2007-12-16 17:31:26 +010054#include <linux/blkdev.h>
Stefan Richter902abed2006-08-14 18:56:00 +020055#include <linux/compiler.h>
56#include <linux/delay.h>
57#include <linux/device.h>
58#include <linux/dma-mapping.h>
59#include <linux/gfp.h>
60#include <linux/init.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070061#include <linux/kernel.h>
62#include <linux/list.h>
Andrew Mortonf84c9222007-04-23 11:50:56 -070063#include <linux/mm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070064#include <linux/module.h>
65#include <linux/moduleparam.h>
Andrew Mortonf84c9222007-04-23 11:50:56 -070066#include <linux/sched.h>
Stefan Richter902abed2006-08-14 18:56:00 +020067#include <linux/slab.h>
68#include <linux/spinlock.h>
69#include <linux/stat.h>
70#include <linux/string.h>
71#include <linux/stringify.h>
72#include <linux/types.h>
Stefan Richtere8398bb2006-07-23 22:19:00 +020073#include <linux/wait.h>
Stefan Richter20e20082007-05-05 17:18:12 +020074#include <linux/workqueue.h>
Adrian Bunk87ae9af2007-10-30 10:35:04 +010075#include <linux/scatterlist.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070076
Linus Torvalds1da177e2005-04-16 15:20:36 -070077#include <asm/byteorder.h>
Stefan Richter902abed2006-08-14 18:56:00 +020078#include <asm/errno.h>
79#include <asm/param.h>
Stefan Richter902abed2006-08-14 18:56:00 +020080#include <asm/system.h>
81#include <asm/types.h>
82
83#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
84#include <asm/io.h> /* for bus_to_virt */
85#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070086
87#include <scsi/scsi.h>
88#include <scsi/scsi_cmnd.h>
89#include <scsi/scsi_dbg.h>
90#include <scsi/scsi_device.h>
91#include <scsi/scsi_host.h>
92
93#include "csr1212.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070094#include "highlevel.h"
Stefan Richter902abed2006-08-14 18:56:00 +020095#include "hosts.h"
96#include "ieee1394.h"
97#include "ieee1394_core.h"
98#include "ieee1394_hotplug.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070099#include "ieee1394_transactions.h"
Stefan Richter902abed2006-08-14 18:56:00 +0200100#include "ieee1394_types.h"
101#include "nodemgr.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102#include "sbp2.h"
103
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104/*
105 * Module load parameter definitions
106 */
107
108/*
109 * Change max_speed on module load if you have a bad IEEE-1394
110 * controller that has trouble running 2KB packets at 400mb.
111 *
112 * NOTE: On certain OHCI parts I have seen short packets on async transmit
113 * (probably due to PCI latency/throughput issues with the part). You can
114 * bump down the speed if you are running into problems.
115 */
Stefan Richterca0c7452006-11-02 21:16:08 +0100116static int sbp2_max_speed = IEEE1394_SPEED_MAX;
117module_param_named(max_speed, sbp2_max_speed, int, 0644);
Stefan Richter28b06672006-11-02 21:16:08 +0100118MODULE_PARM_DESC(max_speed, "Force max speed "
119 "(3 = 800Mb/s, 2 = 400Mb/s, 1 = 200Mb/s, 0 = 100Mb/s)");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120
121/*
Stefan Richter77bba7a2007-06-17 23:54:52 +0200122 * Set serialize_io to 0 or N to use dynamically appended lists of command ORBs.
123 * This is and always has been buggy in multiple subtle ways. See above TODOs.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 */
Stefan Richterca0c7452006-11-02 21:16:08 +0100125static int sbp2_serialize_io = 1;
Stefan Richter77bba7a2007-06-17 23:54:52 +0200126module_param_named(serialize_io, sbp2_serialize_io, bool, 0444);
127MODULE_PARM_DESC(serialize_io, "Serialize requests coming from SCSI drivers "
128 "(default = Y, faster but buggy = N)");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129
130/*
Stefan Richter4e6343a2007-12-16 17:31:26 +0100131 * Adjust max_sectors if you'd like to influence how many sectors each SCSI
132 * command can transfer at most. Please note that some older SBP-2 bridge
133 * chips are broken for transfers greater or equal to 128KB, therefore
134 * max_sectors used to be a safe 255 sectors for many years. We now have a
135 * default of 0 here which means that we let the SCSI stack choose a limit.
136 *
137 * The SBP2_WORKAROUND_128K_MAX_TRANS flag, if set either in the workarounds
138 * module parameter or in the sbp2_workarounds_table[], will override the
139 * value of max_sectors. We should use sbp2_workarounds_table[] to cover any
140 * bridge chip which becomes known to need the 255 sectors limit.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 */
Stefan Richter4e6343a2007-12-16 17:31:26 +0100142static int sbp2_max_sectors;
Stefan Richterca0c7452006-11-02 21:16:08 +0100143module_param_named(max_sectors, sbp2_max_sectors, int, 0444);
144MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported "
Stefan Richter4e6343a2007-12-16 17:31:26 +0100145 "(default = 0 = use SCSI stack's default)");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146
147/*
148 * Exclusive login to sbp2 device? In most cases, the sbp2 driver should
149 * do an exclusive login, as it's generally unsafe to have two hosts
150 * talking to a single sbp2 device at the same time (filesystem coherency,
151 * etc.). If you're running an sbp2 device that supports multiple logins,
152 * and you're either running read-only filesystems or some sort of special
Ben Collins20f45782006-06-12 18:13:11 -0400153 * filesystem supporting multiple hosts, e.g. OpenGFS, Oracle Cluster
154 * File System, or Lustre, then set exclusive_login to zero.
155 *
156 * So far only bridges from Oxford Semiconductor are known to support
157 * concurrent logins. Depending on firmware, four or two concurrent logins
158 * are possible on OXFW911 and newer Oxsemi bridges.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 */
Stefan Richterca0c7452006-11-02 21:16:08 +0100160static int sbp2_exclusive_login = 1;
Stefan Richter77bba7a2007-06-17 23:54:52 +0200161module_param_named(exclusive_login, sbp2_exclusive_login, bool, 0644);
Stefan Richterca0c7452006-11-02 21:16:08 +0100162MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device "
Stefan Richter77bba7a2007-06-17 23:54:52 +0200163 "(default = Y, use N for concurrent initiators)");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164
165/*
Stefan Richter24d3bf82006-05-15 22:04:59 +0200166 * If any of the following workarounds is required for your device to work,
167 * please submit the kernel messages logged by sbp2 to the linux1394-devel
168 * mailing list.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 *
Stefan Richter24d3bf82006-05-15 22:04:59 +0200170 * - 128kB max transfer
171 * Limit transfer size. Necessary for some old bridges.
172 *
173 * - 36 byte inquiry
174 * When scsi_mod probes the device, let the inquiry command look like that
175 * from MS Windows.
176 *
177 * - skip mode page 8
178 * Suppress sending of mode_sense for mode page 8 if the device pretends to
179 * support the SCSI Primary Block commands instead of Reduced Block Commands.
Stefan Richtere9a1c522006-05-15 22:06:37 +0200180 *
181 * - fix capacity
182 * Tell sd_mod to correct the last sector number reported by read_capacity.
183 * Avoids access beyond actual disk limits on devices with an off-by-one bug.
184 * Don't use this with devices which don't have this bug.
Stefan Richter679c0cd2006-05-15 22:08:09 +0200185 *
Stefan Richterd94a9832008-02-03 23:07:44 +0100186 * - delay inquiry
187 * Wait extra SBP2_INQUIRY_DELAY seconds after login before SCSI inquiry.
188 *
Stefan Richter37191222008-05-11 00:35:55 +0200189 * - power condition
190 * Set the power condition field in the START STOP UNIT commands sent by
191 * sd_mod on suspend, resume, and shutdown (if manage_start_stop is on).
192 * Some disks need this to spin down or to resume properly.
193 *
Stefan Richter679c0cd2006-05-15 22:08:09 +0200194 * - override internal blacklist
195 * Instead of adding to the built-in blacklist, use only the workarounds
196 * specified in the module load parameter.
197 * Useful if a blacklist entry interfered with a non-broken device.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 */
Stefan Richter24d3bf82006-05-15 22:04:59 +0200199static int sbp2_default_workarounds;
200module_param_named(workarounds, sbp2_default_workarounds, int, 0644);
201MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0"
202 ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS)
203 ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36)
204 ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8)
Stefan Richtere9a1c522006-05-15 22:06:37 +0200205 ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY)
Stefan Richterd94a9832008-02-03 23:07:44 +0100206 ", delay inquiry = " __stringify(SBP2_WORKAROUND_DELAY_INQUIRY)
Stefan Richter37191222008-05-11 00:35:55 +0200207 ", set power condition in start stop unit = "
208 __stringify(SBP2_WORKAROUND_POWER_CONDITION)
Stefan Richter679c0cd2006-05-15 22:08:09 +0200209 ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE)
Stefan Richter24d3bf82006-05-15 22:04:59 +0200210 ", or a combination)");
211
Stefan Richterd7794c82007-05-27 13:17:15 +0200212/*
213 * This influences the format of the sysfs attribute
214 * /sys/bus/scsi/devices/.../ieee1394_id.
215 *
216 * The default format is like in older kernels: %016Lx:%d:%d
217 * It contains the target's EUI-64, a number given to the logical unit by
218 * the ieee1394 driver's nodemgr (starting at 0), and the LUN.
219 *
220 * The long format is: %016Lx:%06x:%04x
221 * It contains the target's EUI-64, the unit directory's directory_ID as per
222 * IEEE 1212 clause 7.7.19, and the LUN. This format comes closest to the
223 * format of SBP(-3) target port and logical unit identifier as per SAM (SCSI
224 * Architecture Model) rev.2 to 4 annex A. Therefore and because it is
225 * independent of the implementation of the ieee1394 nodemgr, the longer format
226 * is recommended for future use.
227 */
228static int sbp2_long_sysfs_ieee1394_id;
229module_param_named(long_ieee1394_id, sbp2_long_sysfs_ieee1394_id, bool, 0644);
230MODULE_PARM_DESC(long_ieee1394_id, "8+3+2 bytes format of ieee1394_id in sysfs "
231 "(default = backwards-compatible = N, SAM-conforming = Y)");
232
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233
Stefan Richteredf1fb22006-11-02 21:16:08 +0100234#define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
235#define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237/*
238 * Globals
239 */
Stefan Richter138c8af2006-11-02 21:16:08 +0100240static void sbp2scsi_complete_all_commands(struct sbp2_lu *, u32);
241static void sbp2scsi_complete_command(struct sbp2_lu *, u32, struct scsi_cmnd *,
Stefan Richterea42ea02006-11-02 21:16:08 +0100242 void (*)(struct scsi_cmnd *));
Stefan Richter138c8af2006-11-02 21:16:08 +0100243static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *);
244static int sbp2_start_device(struct sbp2_lu *);
245static void sbp2_remove_device(struct sbp2_lu *);
246static int sbp2_login_device(struct sbp2_lu *);
247static int sbp2_reconnect_device(struct sbp2_lu *);
248static int sbp2_logout_device(struct sbp2_lu *);
Stefan Richterea42ea02006-11-02 21:16:08 +0100249static void sbp2_host_reset(struct hpsb_host *);
250static int sbp2_handle_status_write(struct hpsb_host *, int, int, quadlet_t *,
251 u64, size_t, u16);
Stefan Richter138c8af2006-11-02 21:16:08 +0100252static int sbp2_agent_reset(struct sbp2_lu *, int);
253static void sbp2_parse_unit_directory(struct sbp2_lu *,
Stefan Richterea42ea02006-11-02 21:16:08 +0100254 struct unit_directory *);
Stefan Richter138c8af2006-11-02 21:16:08 +0100255static int sbp2_set_busy_timeout(struct sbp2_lu *);
256static int sbp2_max_speed_and_size(struct sbp2_lu *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258
259static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC };
260
Stefan Richter261b5f62007-08-11 11:52:08 +0200261static DEFINE_RWLOCK(sbp2_hi_logical_units_lock);
262
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263static struct hpsb_highlevel sbp2_highlevel = {
Stefan Richterea42ea02006-11-02 21:16:08 +0100264 .name = SBP2_DEVICE_NAME,
265 .host_reset = sbp2_host_reset,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266};
267
268static struct hpsb_address_ops sbp2_ops = {
Stefan Richterea42ea02006-11-02 21:16:08 +0100269 .write = sbp2_handle_status_write
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270};
271
272#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
Stefan Richterea42ea02006-11-02 21:16:08 +0100273static int sbp2_handle_physdma_write(struct hpsb_host *, int, int, quadlet_t *,
274 u64, size_t, u16);
275static int sbp2_handle_physdma_read(struct hpsb_host *, int, quadlet_t *, u64,
276 size_t, u16);
277
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278static struct hpsb_address_ops sbp2_physdma_ops = {
Stefan Richterea42ea02006-11-02 21:16:08 +0100279 .read = sbp2_handle_physdma_read,
280 .write = sbp2_handle_physdma_write,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281};
282#endif
283
Stefan Richterea42ea02006-11-02 21:16:08 +0100284
285/*
286 * Interface to driver core and IEEE 1394 core
287 */
288static struct ieee1394_device_id sbp2_id_table[] = {
289 {
290 .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
291 .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff,
292 .version = SBP2_SW_VERSION_ENTRY & 0xffffff},
293 {}
294};
295MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table);
296
297static int sbp2_probe(struct device *);
298static int sbp2_remove(struct device *);
299static int sbp2_update(struct unit_directory *);
300
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301static struct hpsb_protocol_driver sbp2_driver = {
Ben Collinsed30c262006-11-23 13:59:48 -0500302 .name = SBP2_DEVICE_NAME,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 .id_table = sbp2_id_table,
304 .update = sbp2_update,
305 .driver = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 .probe = sbp2_probe,
307 .remove = sbp2_remove,
308 },
309};
310
Stefan Richterea42ea02006-11-02 21:16:08 +0100311
312/*
313 * Interface to SCSI core
314 */
315static int sbp2scsi_queuecommand(struct scsi_cmnd *,
316 void (*)(struct scsi_cmnd *));
317static int sbp2scsi_abort(struct scsi_cmnd *);
318static int sbp2scsi_reset(struct scsi_cmnd *);
319static int sbp2scsi_slave_alloc(struct scsi_device *);
320static int sbp2scsi_slave_configure(struct scsi_device *);
321static void sbp2scsi_slave_destroy(struct scsi_device *);
322static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *,
323 struct device_attribute *, char *);
324
325static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL);
326
327static struct device_attribute *sbp2_sysfs_sdev_attrs[] = {
328 &dev_attr_ieee1394_id,
329 NULL
330};
331
Stefan Richterca0c7452006-11-02 21:16:08 +0100332static struct scsi_host_template sbp2_shost_template = {
Stefan Richterea42ea02006-11-02 21:16:08 +0100333 .module = THIS_MODULE,
334 .name = "SBP-2 IEEE-1394",
335 .proc_name = SBP2_DEVICE_NAME,
336 .queuecommand = sbp2scsi_queuecommand,
337 .eh_abort_handler = sbp2scsi_abort,
338 .eh_device_reset_handler = sbp2scsi_reset,
339 .slave_alloc = sbp2scsi_slave_alloc,
340 .slave_configure = sbp2scsi_slave_configure,
341 .slave_destroy = sbp2scsi_slave_destroy,
342 .this_id = -1,
343 .sg_tablesize = SG_ALL,
344 .use_clustering = ENABLE_CLUSTERING,
345 .cmd_per_lun = SBP2_MAX_CMDS,
346 .can_queue = SBP2_MAX_CMDS,
Stefan Richterea42ea02006-11-02 21:16:08 +0100347 .sdev_attrs = sbp2_sysfs_sdev_attrs,
348};
349
Stefan Richter4618fd32006-12-30 15:37:09 +0100350/* for match-all entries in sbp2_workarounds_table */
351#define SBP2_ROM_VALUE_WILDCARD 0x1000000
Stefan Richterea42ea02006-11-02 21:16:08 +0100352
Stefan Richtera80614d2006-02-14 22:04:19 -0500353/*
Stefan Richter24d3bf82006-05-15 22:04:59 +0200354 * List of devices with known bugs.
355 *
356 * The firmware_revision field, masked with 0xffff00, is the best indicator
357 * for the type of bridge chip of a device. It yields a few false positives
358 * but this did not break correctly behaving devices so far.
Stefan Richtera80614d2006-02-14 22:04:19 -0500359 */
Stefan Richter24d3bf82006-05-15 22:04:59 +0200360static const struct {
361 u32 firmware_revision;
Stefan Richtere9a1c522006-05-15 22:06:37 +0200362 u32 model_id;
Stefan Richter24d3bf82006-05-15 22:04:59 +0200363 unsigned workarounds;
364} sbp2_workarounds_table[] = {
Ben Collins4b9a3342006-06-12 18:10:18 -0400365 /* DViCO Momobay CX-1 with TSB42AA9 bridge */ {
Stefan Richter24d3bf82006-05-15 22:04:59 +0200366 .firmware_revision = 0x002800,
Ben Collins4b9a3342006-06-12 18:10:18 -0400367 .model_id = 0x001010,
Stefan Richter24d3bf82006-05-15 22:04:59 +0200368 .workarounds = SBP2_WORKAROUND_INQUIRY_36 |
Stefan Richter37191222008-05-11 00:35:55 +0200369 SBP2_WORKAROUND_MODE_SENSE_8 |
370 SBP2_WORKAROUND_POWER_CONDITION,
Stefan Richter24d3bf82006-05-15 22:04:59 +0200371 },
Stefan Richterd94a9832008-02-03 23:07:44 +0100372 /* DViCO Momobay FX-3A with TSB42AA9A bridge */ {
373 .firmware_revision = 0x002800,
374 .model_id = 0x000000,
Stefan Richter37191222008-05-11 00:35:55 +0200375 .workarounds = SBP2_WORKAROUND_DELAY_INQUIRY |
376 SBP2_WORKAROUND_POWER_CONDITION,
Stefan Richterd94a9832008-02-03 23:07:44 +0100377 },
Stefan Richter24d3bf82006-05-15 22:04:59 +0200378 /* Initio bridges, actually only needed for some older ones */ {
379 .firmware_revision = 0x000200,
Stefan Richter4618fd32006-12-30 15:37:09 +0100380 .model_id = SBP2_ROM_VALUE_WILDCARD,
Stefan Richter24d3bf82006-05-15 22:04:59 +0200381 .workarounds = SBP2_WORKAROUND_INQUIRY_36,
382 },
Stefan Richter37191222008-05-11 00:35:55 +0200383 /* PL-3507 bridge with Prolific firmware */ {
384 .firmware_revision = 0x012800,
385 .model_id = SBP2_ROM_VALUE_WILDCARD,
386 .workarounds = SBP2_WORKAROUND_POWER_CONDITION,
387 },
Stefan Richter24d3bf82006-05-15 22:04:59 +0200388 /* Symbios bridge */ {
389 .firmware_revision = 0xa0b800,
Stefan Richter4618fd32006-12-30 15:37:09 +0100390 .model_id = SBP2_ROM_VALUE_WILDCARD,
Stefan Richter24d3bf82006-05-15 22:04:59 +0200391 .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS,
Stefan Richtere9a1c522006-05-15 22:06:37 +0200392 },
Stefan Richter6e45ef42008-03-11 22:32:52 +0100393 /* Datafab MD2-FW2 with Symbios/LSILogic SYM13FW500 bridge */ {
394 .firmware_revision = 0x002600,
395 .model_id = SBP2_ROM_VALUE_WILDCARD,
396 .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS,
397 },
Stefan Richtere9a1c522006-05-15 22:06:37 +0200398 /* iPod 4th generation */ {
399 .firmware_revision = 0x0a2700,
400 .model_id = 0x000021,
401 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
402 },
403 /* iPod mini */ {
404 .firmware_revision = 0x0a2700,
405 .model_id = 0x000023,
406 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
407 },
408 /* iPod Photo */ {
409 .firmware_revision = 0x0a2700,
410 .model_id = 0x00007e,
411 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
Stefan Richter24d3bf82006-05-15 22:04:59 +0200412 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413};
414
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415/**************************************
416 * General utility functions
417 **************************************/
418
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419#ifndef __BIG_ENDIAN
420/*
421 * Converts a buffer from be32 to cpu byte ordering. Length is in bytes.
422 */
Stefan Richter2b01b802006-07-03 12:02:28 -0400423static inline void sbp2util_be32_to_cpu_buffer(void *buffer, int length)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424{
425 u32 *temp = buffer;
426
427 for (length = (length >> 2); length--; )
428 temp[length] = be32_to_cpu(temp[length]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429}
430
431/*
432 * Converts a buffer from cpu to be32 byte ordering. Length is in bytes.
433 */
Stefan Richter2b01b802006-07-03 12:02:28 -0400434static inline void sbp2util_cpu_to_be32_buffer(void *buffer, int length)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435{
436 u32 *temp = buffer;
437
438 for (length = (length >> 2); length--; )
439 temp[length] = cpu_to_be32(temp[length]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440}
441#else /* BIG_ENDIAN */
442/* Why waste the cpu cycles? */
Stefan Richter611aa192006-08-02 18:44:00 +0200443#define sbp2util_be32_to_cpu_buffer(x,y) do {} while (0)
444#define sbp2util_cpu_to_be32_buffer(x,y) do {} while (0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445#endif
446
Stefan Richterca0c7452006-11-02 21:16:08 +0100447static DECLARE_WAIT_QUEUE_HEAD(sbp2_access_wq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448
Stefan Richtere8398bb2006-07-23 22:19:00 +0200449/*
450 * Waits for completion of an SBP-2 access request.
451 * Returns nonzero if timed out or prematurely interrupted.
452 */
Stefan Richter138c8af2006-11-02 21:16:08 +0100453static int sbp2util_access_timeout(struct sbp2_lu *lu, int timeout)
Stefan Richtere8398bb2006-07-23 22:19:00 +0200454{
Stefan Richterca0c7452006-11-02 21:16:08 +0100455 long leftover;
Stefan Richtere8398bb2006-07-23 22:19:00 +0200456
Stefan Richterca0c7452006-11-02 21:16:08 +0100457 leftover = wait_event_interruptible_timeout(
Stefan Richter138c8af2006-11-02 21:16:08 +0100458 sbp2_access_wq, lu->access_complete, timeout);
459 lu->access_complete = 0;
Stefan Richtere8398bb2006-07-23 22:19:00 +0200460 return leftover <= 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461}
462
Stefan Richter138c8af2006-11-02 21:16:08 +0100463static void sbp2_free_packet(void *packet)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464{
465 hpsb_free_tlabel(packet);
466 hpsb_free_packet(packet);
467}
468
Stefan Richtere8ca5662006-11-02 21:16:08 +0100469/*
470 * This is much like hpsb_node_write(), except it ignores the response
471 * subaction and returns immediately. Can be used from atomic context.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 */
473static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr,
Stefan Richter138c8af2006-11-02 21:16:08 +0100474 quadlet_t *buf, size_t len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475{
476 struct hpsb_packet *packet;
477
Stefan Richter138c8af2006-11-02 21:16:08 +0100478 packet = hpsb_make_writepacket(ne->host, ne->nodeid, addr, buf, len);
Stefan Richtera237f352005-11-07 06:31:39 -0500479 if (!packet)
480 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481
Stefan Richter138c8af2006-11-02 21:16:08 +0100482 hpsb_set_packet_complete_task(packet, sbp2_free_packet, packet);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 hpsb_node_fill_packet(ne, packet);
Stefan Richtera237f352005-11-07 06:31:39 -0500484 if (hpsb_send_packet(packet) < 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 sbp2_free_packet(packet);
486 return -EIO;
487 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 return 0;
489}
490
Stefan Richter138c8af2006-11-02 21:16:08 +0100491static void sbp2util_notify_fetch_agent(struct sbp2_lu *lu, u64 offset,
492 quadlet_t *data, size_t len)
Stefan Richter09ee67a2006-08-14 18:43:00 +0200493{
Stefan Richter138c8af2006-11-02 21:16:08 +0100494 /* There is a small window after a bus reset within which the node
495 * entry's generation is current but the reconnect wasn't completed. */
496 if (unlikely(atomic_read(&lu->state) == SBP2LU_STATE_IN_RESET))
Stefan Richter09ee67a2006-08-14 18:43:00 +0200497 return;
498
Stefan Richter138c8af2006-11-02 21:16:08 +0100499 if (hpsb_node_write(lu->ne, lu->command_block_agent_addr + offset,
Stefan Richter09ee67a2006-08-14 18:43:00 +0200500 data, len))
501 SBP2_ERR("sbp2util_notify_fetch_agent failed.");
Stefan Richter138c8af2006-11-02 21:16:08 +0100502
503 /* Now accept new SCSI commands, unless a bus reset happended during
504 * hpsb_node_write. */
505 if (likely(atomic_read(&lu->state) != SBP2LU_STATE_IN_RESET))
506 scsi_unblock_requests(lu->shost);
Stefan Richter09ee67a2006-08-14 18:43:00 +0200507}
508
David Howellsc4028952006-11-22 14:57:56 +0000509static void sbp2util_write_orb_pointer(struct work_struct *work)
Stefan Richter09ee67a2006-08-14 18:43:00 +0200510{
Stefan Richterec9b7e12006-12-07 23:23:25 +0100511 struct sbp2_lu *lu = container_of(work, struct sbp2_lu, protocol_work);
Stefan Richter09ee67a2006-08-14 18:43:00 +0200512 quadlet_t data[2];
513
Stefan Richterec9b7e12006-12-07 23:23:25 +0100514 data[0] = ORB_SET_NODE_ID(lu->hi->host->node_id);
515 data[1] = lu->last_orb_dma;
Stefan Richter09ee67a2006-08-14 18:43:00 +0200516 sbp2util_cpu_to_be32_buffer(data, 8);
Stefan Richterec9b7e12006-12-07 23:23:25 +0100517 sbp2util_notify_fetch_agent(lu, SBP2_ORB_POINTER_OFFSET, data, 8);
Stefan Richter09ee67a2006-08-14 18:43:00 +0200518}
519
David Howellsc4028952006-11-22 14:57:56 +0000520static void sbp2util_write_doorbell(struct work_struct *work)
Stefan Richter09ee67a2006-08-14 18:43:00 +0200521{
Stefan Richterec9b7e12006-12-07 23:23:25 +0100522 struct sbp2_lu *lu = container_of(work, struct sbp2_lu, protocol_work);
523
524 sbp2util_notify_fetch_agent(lu, SBP2_DOORBELL_OFFSET, NULL, 4);
Stefan Richter09ee67a2006-08-14 18:43:00 +0200525}
526
Stefan Richter138c8af2006-11-02 21:16:08 +0100527static int sbp2util_create_command_orb_pool(struct sbp2_lu *lu)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528{
Stefan Richter138c8af2006-11-02 21:16:08 +0100529 struct sbp2_fwhost_info *hi = lu->hi;
Stefan Richter138c8af2006-11-02 21:16:08 +0100530 struct sbp2_command_info *cmd;
Stefan Richter3d269cb2007-02-04 20:57:38 +0100531 int i, orbs = sbp2_serialize_io ? 2 : SBP2_MAX_CMDS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 for (i = 0; i < orbs; i++) {
Stefan Richter3d269cb2007-02-04 20:57:38 +0100534 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
535 if (!cmd)
Stefan Richtera237f352005-11-07 06:31:39 -0500536 return -ENOMEM;
Stefan Richter97d552e2006-12-29 23:47:04 +0100537 cmd->command_orb_dma = dma_map_single(hi->host->device.parent,
Stefan Richter138c8af2006-11-02 21:16:08 +0100538 &cmd->command_orb,
539 sizeof(struct sbp2_command_orb),
Stefan Richter9b7d9c02006-11-22 21:44:34 +0100540 DMA_TO_DEVICE);
Stefan Richter97d552e2006-12-29 23:47:04 +0100541 cmd->sge_dma = dma_map_single(hi->host->device.parent,
Stefan Richter138c8af2006-11-02 21:16:08 +0100542 &cmd->scatter_gather_element,
543 sizeof(cmd->scatter_gather_element),
Stefan Richter2446a792007-02-04 20:54:57 +0100544 DMA_TO_DEVICE);
Stefan Richter138c8af2006-11-02 21:16:08 +0100545 INIT_LIST_HEAD(&cmd->list);
546 list_add_tail(&cmd->list, &lu->cmd_orb_completed);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548 return 0;
549}
550
Stefan Richtera2ee3f92007-08-11 11:51:16 +0200551static void sbp2util_remove_command_orb_pool(struct sbp2_lu *lu,
552 struct hpsb_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554 struct list_head *lh, *next;
Stefan Richter138c8af2006-11-02 21:16:08 +0100555 struct sbp2_command_info *cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 unsigned long flags;
557
Stefan Richter138c8af2006-11-02 21:16:08 +0100558 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
559 if (!list_empty(&lu->cmd_orb_completed))
560 list_for_each_safe(lh, next, &lu->cmd_orb_completed) {
561 cmd = list_entry(lh, struct sbp2_command_info, list);
Stefan Richter97d552e2006-12-29 23:47:04 +0100562 dma_unmap_single(host->device.parent,
563 cmd->command_orb_dma,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564 sizeof(struct sbp2_command_orb),
Stefan Richter9b7d9c02006-11-22 21:44:34 +0100565 DMA_TO_DEVICE);
Stefan Richter97d552e2006-12-29 23:47:04 +0100566 dma_unmap_single(host->device.parent, cmd->sge_dma,
Stefan Richter138c8af2006-11-02 21:16:08 +0100567 sizeof(cmd->scatter_gather_element),
Stefan Richter2446a792007-02-04 20:54:57 +0100568 DMA_TO_DEVICE);
Stefan Richter138c8af2006-11-02 21:16:08 +0100569 kfree(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570 }
Stefan Richter138c8af2006-11-02 21:16:08 +0100571 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 return;
573}
574
575/*
Stefan Richtere8ca5662006-11-02 21:16:08 +0100576 * Finds the sbp2_command for a given outstanding command ORB.
577 * Only looks at the in-use list.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578 */
579static struct sbp2_command_info *sbp2util_find_command_for_orb(
Stefan Richter138c8af2006-11-02 21:16:08 +0100580 struct sbp2_lu *lu, dma_addr_t orb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581{
Stefan Richter138c8af2006-11-02 21:16:08 +0100582 struct sbp2_command_info *cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 unsigned long flags;
584
Stefan Richter138c8af2006-11-02 21:16:08 +0100585 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
586 if (!list_empty(&lu->cmd_orb_inuse))
587 list_for_each_entry(cmd, &lu->cmd_orb_inuse, list)
588 if (cmd->command_orb_dma == orb) {
589 spin_unlock_irqrestore(
590 &lu->cmd_orb_lock, flags);
591 return cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 }
Stefan Richter138c8af2006-11-02 21:16:08 +0100593 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
Stefan Richtera237f352005-11-07 06:31:39 -0500594 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595}
596
597/*
Stefan Richtere8ca5662006-11-02 21:16:08 +0100598 * Finds the sbp2_command for a given outstanding SCpnt.
599 * Only looks at the in-use list.
Stefan Richter138c8af2006-11-02 21:16:08 +0100600 * Must be called with lu->cmd_orb_lock held.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601 */
Stefan Richter24c7cd02006-04-01 21:11:41 +0200602static struct sbp2_command_info *sbp2util_find_command_for_SCpnt(
Stefan Richter138c8af2006-11-02 21:16:08 +0100603 struct sbp2_lu *lu, void *SCpnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604{
Stefan Richter138c8af2006-11-02 21:16:08 +0100605 struct sbp2_command_info *cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606
Stefan Richter138c8af2006-11-02 21:16:08 +0100607 if (!list_empty(&lu->cmd_orb_inuse))
608 list_for_each_entry(cmd, &lu->cmd_orb_inuse, list)
609 if (cmd->Current_SCpnt == SCpnt)
610 return cmd;
Stefan Richtera237f352005-11-07 06:31:39 -0500611 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612}
613
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614static struct sbp2_command_info *sbp2util_allocate_command_orb(
Stefan Richter138c8af2006-11-02 21:16:08 +0100615 struct sbp2_lu *lu,
616 struct scsi_cmnd *Current_SCpnt,
617 void (*Current_done)(struct scsi_cmnd *))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618{
619 struct list_head *lh;
Stefan Richter138c8af2006-11-02 21:16:08 +0100620 struct sbp2_command_info *cmd = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621 unsigned long flags;
622
Stefan Richter138c8af2006-11-02 21:16:08 +0100623 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
624 if (!list_empty(&lu->cmd_orb_completed)) {
625 lh = lu->cmd_orb_completed.next;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626 list_del(lh);
Stefan Richter138c8af2006-11-02 21:16:08 +0100627 cmd = list_entry(lh, struct sbp2_command_info, list);
628 cmd->Current_done = Current_done;
629 cmd->Current_SCpnt = Current_SCpnt;
630 list_add_tail(&cmd->list, &lu->cmd_orb_inuse);
631 } else
Harvey Harrisonb1ce1fd2008-03-05 18:24:54 -0800632 SBP2_ERR("%s: no orbs available", __func__);
Stefan Richter138c8af2006-11-02 21:16:08 +0100633 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
634 return cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635}
636
Stefan Richter58272c12006-11-04 09:55:33 +0100637/*
638 * Unmaps the DMAs of a command and moves the command to the completed ORB list.
639 * Must be called with lu->cmd_orb_lock held.
640 */
641static void sbp2util_mark_command_completed(struct sbp2_lu *lu,
642 struct sbp2_command_info *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643{
Stefan Richter58272c12006-11-04 09:55:33 +0100644 struct hpsb_host *host = lu->ud->ne->host;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645
Stefan Richter138c8af2006-11-02 21:16:08 +0100646 if (cmd->cmd_dma) {
647 if (cmd->dma_type == CMD_DMA_SINGLE)
Stefan Richter97d552e2006-12-29 23:47:04 +0100648 dma_unmap_single(host->device.parent, cmd->cmd_dma,
Stefan Richter138c8af2006-11-02 21:16:08 +0100649 cmd->dma_size, cmd->dma_dir);
650 else if (cmd->dma_type == CMD_DMA_PAGE)
Stefan Richter97d552e2006-12-29 23:47:04 +0100651 dma_unmap_page(host->device.parent, cmd->cmd_dma,
Stefan Richter138c8af2006-11-02 21:16:08 +0100652 cmd->dma_size, cmd->dma_dir);
Stefan Richteredf1fb22006-11-02 21:16:08 +0100653 /* XXX: Check for CMD_DMA_NONE bug */
Stefan Richter138c8af2006-11-02 21:16:08 +0100654 cmd->dma_type = CMD_DMA_NONE;
655 cmd->cmd_dma = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 }
Stefan Richter138c8af2006-11-02 21:16:08 +0100657 if (cmd->sge_buffer) {
Stefan Richter97d552e2006-12-29 23:47:04 +0100658 dma_unmap_sg(host->device.parent, cmd->sge_buffer,
Stefan Richter138c8af2006-11-02 21:16:08 +0100659 cmd->dma_size, cmd->dma_dir);
660 cmd->sge_buffer = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661 }
Stefan Richtercd641f62006-11-02 21:16:08 +0100662 list_move_tail(&cmd->list, &lu->cmd_orb_completed);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663}
664
Jody McIntyreabd559b2005-09-30 11:59:06 -0700665/*
Stefan Richter138c8af2006-11-02 21:16:08 +0100666 * Is lu valid? Is the 1394 node still present?
Jody McIntyreabd559b2005-09-30 11:59:06 -0700667 */
Stefan Richter138c8af2006-11-02 21:16:08 +0100668static inline int sbp2util_node_is_available(struct sbp2_lu *lu)
Jody McIntyreabd559b2005-09-30 11:59:06 -0700669{
Stefan Richter138c8af2006-11-02 21:16:08 +0100670 return lu && lu->ne && !lu->ne->in_limbo;
Jody McIntyreabd559b2005-09-30 11:59:06 -0700671}
672
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673/*********************************************
674 * IEEE-1394 core driver stack related section
675 *********************************************/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676
677static int sbp2_probe(struct device *dev)
678{
679 struct unit_directory *ud;
Stefan Richter138c8af2006-11-02 21:16:08 +0100680 struct sbp2_lu *lu;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682 ud = container_of(dev, struct unit_directory, device);
683
684 /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s)
685 * instead. */
686 if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY)
687 return -ENODEV;
688
Stefan Richter138c8af2006-11-02 21:16:08 +0100689 lu = sbp2_alloc_device(ud);
690 if (!lu)
Stefan Richtera237f352005-11-07 06:31:39 -0500691 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692
Stefan Richter138c8af2006-11-02 21:16:08 +0100693 sbp2_parse_unit_directory(lu, ud);
694 return sbp2_start_device(lu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695}
696
697static int sbp2_remove(struct device *dev)
698{
699 struct unit_directory *ud;
Stefan Richter138c8af2006-11-02 21:16:08 +0100700 struct sbp2_lu *lu;
Jody McIntyreabd559b2005-09-30 11:59:06 -0700701 struct scsi_device *sdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703 ud = container_of(dev, struct unit_directory, device);
Stefan Richter138c8af2006-11-02 21:16:08 +0100704 lu = ud->device.driver_data;
705 if (!lu)
Jody McIntyreabd559b2005-09-30 11:59:06 -0700706 return 0;
707
Stefan Richter138c8af2006-11-02 21:16:08 +0100708 if (lu->shost) {
Stefan Richterbf637ec2006-01-31 00:13:06 -0500709 /* Get rid of enqueued commands if there is no chance to
710 * send them. */
Stefan Richter138c8af2006-11-02 21:16:08 +0100711 if (!sbp2util_node_is_available(lu))
712 sbp2scsi_complete_all_commands(lu, DID_NO_CONNECT);
Stefan Richtere8ca5662006-11-02 21:16:08 +0100713 /* scsi_remove_device() may trigger shutdown functions of SCSI
Stefan Richterbf637ec2006-01-31 00:13:06 -0500714 * highlevel drivers which would deadlock if blocked. */
Stefan Richter138c8af2006-11-02 21:16:08 +0100715 atomic_set(&lu->state, SBP2LU_STATE_IN_SHUTDOWN);
716 scsi_unblock_requests(lu->shost);
Stefan Richterbf637ec2006-01-31 00:13:06 -0500717 }
Stefan Richter138c8af2006-11-02 21:16:08 +0100718 sdev = lu->sdev;
Jody McIntyreabd559b2005-09-30 11:59:06 -0700719 if (sdev) {
Stefan Richter138c8af2006-11-02 21:16:08 +0100720 lu->sdev = NULL;
Jody McIntyreabd559b2005-09-30 11:59:06 -0700721 scsi_remove_device(sdev);
722 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723
Stefan Richter138c8af2006-11-02 21:16:08 +0100724 sbp2_logout_device(lu);
725 sbp2_remove_device(lu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726
727 return 0;
728}
729
730static int sbp2_update(struct unit_directory *ud)
731{
Stefan Richter138c8af2006-11-02 21:16:08 +0100732 struct sbp2_lu *lu = ud->device.driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733
Stefan Richtera3384062008-08-16 13:39:26 +0200734 if (sbp2_reconnect_device(lu) != 0) {
735 /*
736 * Reconnect failed. If another bus reset happened,
737 * let nodemgr proceed and call sbp2_update again later
738 * (or sbp2_remove if this node went away).
739 */
740 if (!hpsb_node_entry_valid(lu->ne))
741 return 0;
742 /*
743 * Or the target rejected the reconnect because we weren't
744 * fast enough. Try a regular login, but first log out
745 * just in case of any weirdness.
746 */
Stefan Richter138c8af2006-11-02 21:16:08 +0100747 sbp2_logout_device(lu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748
Stefan Richtera3384062008-08-16 13:39:26 +0200749 if (sbp2_login_device(lu) != 0) {
750 if (!hpsb_node_entry_valid(lu->ne))
751 return 0;
752
753 /* Maybe another initiator won the login. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754 SBP2_ERR("Failed to reconnect to sbp2 device!");
755 return -EBUSY;
756 }
757 }
758
Stefan Richter138c8af2006-11-02 21:16:08 +0100759 sbp2_set_busy_timeout(lu);
760 sbp2_agent_reset(lu, 1);
761 sbp2_max_speed_and_size(lu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762
Stefan Richtere8ca5662006-11-02 21:16:08 +0100763 /* Complete any pending commands with busy (so they get retried)
764 * and remove them from our queue. */
Stefan Richter138c8af2006-11-02 21:16:08 +0100765 sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766
Stefan Richter4fc383c2006-08-14 18:46:00 +0200767 /* Accept new commands unless there was another bus reset in the
768 * meantime. */
Stefan Richter138c8af2006-11-02 21:16:08 +0100769 if (hpsb_node_entry_valid(lu->ne)) {
770 atomic_set(&lu->state, SBP2LU_STATE_RUNNING);
771 scsi_unblock_requests(lu->shost);
Stefan Richter4fc383c2006-08-14 18:46:00 +0200772 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773 return 0;
774}
775
Stefan Richter138c8af2006-11-02 21:16:08 +0100776static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *ud)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777{
Stefan Richterca0c7452006-11-02 21:16:08 +0100778 struct sbp2_fwhost_info *hi;
Stefan Richter138c8af2006-11-02 21:16:08 +0100779 struct Scsi_Host *shost = NULL;
780 struct sbp2_lu *lu = NULL;
Stefan Richter261b5f62007-08-11 11:52:08 +0200781 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782
Stefan Richter138c8af2006-11-02 21:16:08 +0100783 lu = kzalloc(sizeof(*lu), GFP_KERNEL);
784 if (!lu) {
785 SBP2_ERR("failed to create lu");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786 goto failed_alloc;
787 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788
Stefan Richter138c8af2006-11-02 21:16:08 +0100789 lu->ne = ud->ne;
790 lu->ud = ud;
791 lu->speed_code = IEEE1394_SPEED_100;
792 lu->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100];
793 lu->status_fifo_addr = CSR1212_INVALID_ADDR_SPACE;
794 INIT_LIST_HEAD(&lu->cmd_orb_inuse);
795 INIT_LIST_HEAD(&lu->cmd_orb_completed);
796 INIT_LIST_HEAD(&lu->lu_list);
797 spin_lock_init(&lu->cmd_orb_lock);
798 atomic_set(&lu->state, SBP2LU_STATE_RUNNING);
799 INIT_WORK(&lu->protocol_work, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800
Stefan Richter138c8af2006-11-02 21:16:08 +0100801 ud->device.driver_data = lu;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802
803 hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host);
804 if (!hi) {
Stefan Richter138c8af2006-11-02 21:16:08 +0100805 hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host,
806 sizeof(*hi));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807 if (!hi) {
808 SBP2_ERR("failed to allocate hostinfo");
809 goto failed_alloc;
810 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811 hi->host = ud->ne->host;
Stefan Richter138c8af2006-11-02 21:16:08 +0100812 INIT_LIST_HEAD(&hi->logical_units);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
815 /* Handle data movement if physical dma is not
Stefan Richter55664052006-03-28 19:59:42 -0500816 * enabled or not supported on host controller */
817 if (!hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host,
818 &sbp2_physdma_ops,
819 0x0ULL, 0xfffffffcULL)) {
820 SBP2_ERR("failed to register lower 4GB address range");
821 goto failed_alloc;
822 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823#endif
824 }
825
Stefan Richter147830f2006-03-28 19:54:52 -0500826 /* Prevent unloading of the 1394 host */
827 if (!try_module_get(hi->host->driver->owner)) {
828 SBP2_ERR("failed to get a reference on 1394 host driver");
829 goto failed_alloc;
830 }
831
Stefan Richter138c8af2006-11-02 21:16:08 +0100832 lu->hi = hi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833
Stefan Richter261b5f62007-08-11 11:52:08 +0200834 write_lock_irqsave(&sbp2_hi_logical_units_lock, flags);
Stefan Richter138c8af2006-11-02 21:16:08 +0100835 list_add_tail(&lu->lu_list, &hi->logical_units);
Stefan Richter261b5f62007-08-11 11:52:08 +0200836 write_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837
Stefan Richter35bdddb2006-01-31 00:13:33 -0500838 /* Register the status FIFO address range. We could use the same FIFO
839 * for targets at different nodes. However we need different FIFOs per
Stefan Richtera54c9d32006-05-15 22:09:46 +0200840 * target in order to support multi-unit devices.
841 * The FIFO is located out of the local host controller's physical range
842 * but, if possible, within the posted write area. Status writes will
843 * then be performed as unified transactions. This slightly reduces
844 * bandwidth usage, and some Prolific based devices seem to require it.
845 */
Stefan Richter138c8af2006-11-02 21:16:08 +0100846 lu->status_fifo_addr = hpsb_allocate_and_register_addrspace(
Stefan Richter35bdddb2006-01-31 00:13:33 -0500847 &sbp2_highlevel, ud->ne->host, &sbp2_ops,
848 sizeof(struct sbp2_status_block), sizeof(quadlet_t),
Ben Collins40ae6c52006-06-12 18:13:49 -0400849 ud->ne->host->low_addr_space, CSR1212_ALL_SPACE_END);
Stefan Richter138c8af2006-11-02 21:16:08 +0100850 if (lu->status_fifo_addr == CSR1212_INVALID_ADDR_SPACE) {
Stefan Richter35bdddb2006-01-31 00:13:33 -0500851 SBP2_ERR("failed to allocate status FIFO address range");
852 goto failed_alloc;
853 }
854
Stefan Richter138c8af2006-11-02 21:16:08 +0100855 shost = scsi_host_alloc(&sbp2_shost_template, sizeof(unsigned long));
856 if (!shost) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857 SBP2_ERR("failed to register scsi host");
858 goto failed_alloc;
859 }
860
Stefan Richter138c8af2006-11-02 21:16:08 +0100861 shost->hostdata[0] = (unsigned long)lu;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862
Stefan Richter138c8af2006-11-02 21:16:08 +0100863 if (!scsi_add_host(shost, &ud->device)) {
864 lu->shost = shost;
865 return lu;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866 }
867
868 SBP2_ERR("failed to add scsi host");
Stefan Richter138c8af2006-11-02 21:16:08 +0100869 scsi_host_put(shost);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870
871failed_alloc:
Stefan Richter138c8af2006-11-02 21:16:08 +0100872 sbp2_remove_device(lu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873 return NULL;
874}
875
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876static void sbp2_host_reset(struct hpsb_host *host)
877{
Stefan Richterca0c7452006-11-02 21:16:08 +0100878 struct sbp2_fwhost_info *hi;
Stefan Richter138c8af2006-11-02 21:16:08 +0100879 struct sbp2_lu *lu;
Stefan Richter261b5f62007-08-11 11:52:08 +0200880 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881
882 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
Stefan Richter2cccbb52006-08-14 18:59:00 +0200883 if (!hi)
884 return;
Stefan Richter261b5f62007-08-11 11:52:08 +0200885
886 read_lock_irqsave(&sbp2_hi_logical_units_lock, flags);
Stefan Richter138c8af2006-11-02 21:16:08 +0100887 list_for_each_entry(lu, &hi->logical_units, lu_list)
888 if (likely(atomic_read(&lu->state) !=
Stefan Richter2cccbb52006-08-14 18:59:00 +0200889 SBP2LU_STATE_IN_SHUTDOWN)) {
Stefan Richter138c8af2006-11-02 21:16:08 +0100890 atomic_set(&lu->state, SBP2LU_STATE_IN_RESET);
891 scsi_block_requests(lu->shost);
Stefan Richter09ee67a2006-08-14 18:43:00 +0200892 }
Stefan Richter261b5f62007-08-11 11:52:08 +0200893 read_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894}
895
Stefan Richter138c8af2006-11-02 21:16:08 +0100896static int sbp2_start_device(struct sbp2_lu *lu)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897{
Stefan Richter138c8af2006-11-02 21:16:08 +0100898 struct sbp2_fwhost_info *hi = lu->hi;
James Bottomley146f7262005-09-10 12:44:09 -0500899 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900
Stefan Richter97d552e2006-12-29 23:47:04 +0100901 lu->login_response = dma_alloc_coherent(hi->host->device.parent,
Stefan Richtera237f352005-11-07 06:31:39 -0500902 sizeof(struct sbp2_login_response),
Stefan Richter9b7d9c02006-11-22 21:44:34 +0100903 &lu->login_response_dma, GFP_KERNEL);
Stefan Richter138c8af2006-11-02 21:16:08 +0100904 if (!lu->login_response)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905 goto alloc_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906
Stefan Richter97d552e2006-12-29 23:47:04 +0100907 lu->query_logins_orb = dma_alloc_coherent(hi->host->device.parent,
Stefan Richtera237f352005-11-07 06:31:39 -0500908 sizeof(struct sbp2_query_logins_orb),
Stefan Richter9b7d9c02006-11-22 21:44:34 +0100909 &lu->query_logins_orb_dma, GFP_KERNEL);
Stefan Richter138c8af2006-11-02 21:16:08 +0100910 if (!lu->query_logins_orb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911 goto alloc_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912
Stefan Richter97d552e2006-12-29 23:47:04 +0100913 lu->query_logins_response = dma_alloc_coherent(hi->host->device.parent,
Stefan Richtera237f352005-11-07 06:31:39 -0500914 sizeof(struct sbp2_query_logins_response),
Stefan Richter9b7d9c02006-11-22 21:44:34 +0100915 &lu->query_logins_response_dma, GFP_KERNEL);
Stefan Richter138c8af2006-11-02 21:16:08 +0100916 if (!lu->query_logins_response)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917 goto alloc_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918
Stefan Richter97d552e2006-12-29 23:47:04 +0100919 lu->reconnect_orb = dma_alloc_coherent(hi->host->device.parent,
Stefan Richtera237f352005-11-07 06:31:39 -0500920 sizeof(struct sbp2_reconnect_orb),
Stefan Richter9b7d9c02006-11-22 21:44:34 +0100921 &lu->reconnect_orb_dma, GFP_KERNEL);
Stefan Richter138c8af2006-11-02 21:16:08 +0100922 if (!lu->reconnect_orb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923 goto alloc_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924
Stefan Richter97d552e2006-12-29 23:47:04 +0100925 lu->logout_orb = dma_alloc_coherent(hi->host->device.parent,
Stefan Richtera237f352005-11-07 06:31:39 -0500926 sizeof(struct sbp2_logout_orb),
Stefan Richter9b7d9c02006-11-22 21:44:34 +0100927 &lu->logout_orb_dma, GFP_KERNEL);
Stefan Richter138c8af2006-11-02 21:16:08 +0100928 if (!lu->logout_orb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929 goto alloc_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930
Stefan Richter97d552e2006-12-29 23:47:04 +0100931 lu->login_orb = dma_alloc_coherent(hi->host->device.parent,
Stefan Richtera237f352005-11-07 06:31:39 -0500932 sizeof(struct sbp2_login_orb),
Stefan Richter9b7d9c02006-11-22 21:44:34 +0100933 &lu->login_orb_dma, GFP_KERNEL);
Stefan Richter138c8af2006-11-02 21:16:08 +0100934 if (!lu->login_orb)
Stefan Richtereaceec72005-12-13 11:05:05 -0500935 goto alloc_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936
Stefan Richter3d269cb2007-02-04 20:57:38 +0100937 if (sbp2util_create_command_orb_pool(lu))
938 goto alloc_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939
Stefan Richtere8ca5662006-11-02 21:16:08 +0100940 /* Wait a second before trying to log in. Previously logged in
941 * initiators need a chance to reconnect. */
Stefan Richter902abed2006-08-14 18:56:00 +0200942 if (msleep_interruptible(1000)) {
Stefan Richter138c8af2006-11-02 21:16:08 +0100943 sbp2_remove_device(lu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944 return -EINTR;
945 }
Stefan Richtera237f352005-11-07 06:31:39 -0500946
Stefan Richter138c8af2006-11-02 21:16:08 +0100947 if (sbp2_login_device(lu)) {
948 sbp2_remove_device(lu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949 return -EBUSY;
950 }
951
Stefan Richter138c8af2006-11-02 21:16:08 +0100952 sbp2_set_busy_timeout(lu);
953 sbp2_agent_reset(lu, 1);
954 sbp2_max_speed_and_size(lu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955
Stefan Richterd94a9832008-02-03 23:07:44 +0100956 if (lu->workarounds & SBP2_WORKAROUND_DELAY_INQUIRY)
957 ssleep(SBP2_INQUIRY_DELAY);
958
Stefan Richter138c8af2006-11-02 21:16:08 +0100959 error = scsi_add_device(lu->shost, 0, lu->ud->id, 0);
James Bottomley146f7262005-09-10 12:44:09 -0500960 if (error) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700961 SBP2_ERR("scsi_add_device failed");
Stefan Richter138c8af2006-11-02 21:16:08 +0100962 sbp2_logout_device(lu);
963 sbp2_remove_device(lu);
James Bottomley146f7262005-09-10 12:44:09 -0500964 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965 }
966
967 return 0;
Stefan Richtereaceec72005-12-13 11:05:05 -0500968
969alloc_fail:
Stefan Richter138c8af2006-11-02 21:16:08 +0100970 SBP2_ERR("Could not allocate memory for lu");
971 sbp2_remove_device(lu);
Stefan Richtereaceec72005-12-13 11:05:05 -0500972 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700973}
974
Stefan Richter138c8af2006-11-02 21:16:08 +0100975static void sbp2_remove_device(struct sbp2_lu *lu)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976{
Stefan Richterca0c7452006-11-02 21:16:08 +0100977 struct sbp2_fwhost_info *hi;
Stefan Richter261b5f62007-08-11 11:52:08 +0200978 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979
Stefan Richter138c8af2006-11-02 21:16:08 +0100980 if (!lu)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981 return;
Stefan Richter138c8af2006-11-02 21:16:08 +0100982 hi = lu->hi;
Stefan Richtera2ee3f92007-08-11 11:51:16 +0200983 if (!hi)
984 goto no_hi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985
Stefan Richter138c8af2006-11-02 21:16:08 +0100986 if (lu->shost) {
987 scsi_remove_host(lu->shost);
988 scsi_host_put(lu->shost);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989 }
Stefan Richter09ee67a2006-08-14 18:43:00 +0200990 flush_scheduled_work();
Stefan Richtera2ee3f92007-08-11 11:51:16 +0200991 sbp2util_remove_command_orb_pool(lu, hi->host);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992
Stefan Richter261b5f62007-08-11 11:52:08 +0200993 write_lock_irqsave(&sbp2_hi_logical_units_lock, flags);
Stefan Richter138c8af2006-11-02 21:16:08 +0100994 list_del(&lu->lu_list);
Stefan Richter261b5f62007-08-11 11:52:08 +0200995 write_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996
Stefan Richter138c8af2006-11-02 21:16:08 +0100997 if (lu->login_response)
Stefan Richter97d552e2006-12-29 23:47:04 +0100998 dma_free_coherent(hi->host->device.parent,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999 sizeof(struct sbp2_login_response),
Stefan Richter138c8af2006-11-02 21:16:08 +01001000 lu->login_response,
1001 lu->login_response_dma);
1002 if (lu->login_orb)
Stefan Richter97d552e2006-12-29 23:47:04 +01001003 dma_free_coherent(hi->host->device.parent,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004 sizeof(struct sbp2_login_orb),
Stefan Richter138c8af2006-11-02 21:16:08 +01001005 lu->login_orb,
1006 lu->login_orb_dma);
1007 if (lu->reconnect_orb)
Stefan Richter97d552e2006-12-29 23:47:04 +01001008 dma_free_coherent(hi->host->device.parent,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001009 sizeof(struct sbp2_reconnect_orb),
Stefan Richter138c8af2006-11-02 21:16:08 +01001010 lu->reconnect_orb,
1011 lu->reconnect_orb_dma);
1012 if (lu->logout_orb)
Stefan Richter97d552e2006-12-29 23:47:04 +01001013 dma_free_coherent(hi->host->device.parent,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014 sizeof(struct sbp2_logout_orb),
Stefan Richter138c8af2006-11-02 21:16:08 +01001015 lu->logout_orb,
1016 lu->logout_orb_dma);
1017 if (lu->query_logins_orb)
Stefan Richter97d552e2006-12-29 23:47:04 +01001018 dma_free_coherent(hi->host->device.parent,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019 sizeof(struct sbp2_query_logins_orb),
Stefan Richter138c8af2006-11-02 21:16:08 +01001020 lu->query_logins_orb,
1021 lu->query_logins_orb_dma);
1022 if (lu->query_logins_response)
Stefan Richter97d552e2006-12-29 23:47:04 +01001023 dma_free_coherent(hi->host->device.parent,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024 sizeof(struct sbp2_query_logins_response),
Stefan Richter138c8af2006-11-02 21:16:08 +01001025 lu->query_logins_response,
1026 lu->query_logins_response_dma);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027
Stefan Richter138c8af2006-11-02 21:16:08 +01001028 if (lu->status_fifo_addr != CSR1212_INVALID_ADDR_SPACE)
Stefan Richter35bdddb2006-01-31 00:13:33 -05001029 hpsb_unregister_addrspace(&sbp2_highlevel, hi->host,
Stefan Richter138c8af2006-11-02 21:16:08 +01001030 lu->status_fifo_addr);
Stefan Richter35bdddb2006-01-31 00:13:33 -05001031
Stefan Richter138c8af2006-11-02 21:16:08 +01001032 lu->ud->device.driver_data = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033
Stefan Richtera2ee3f92007-08-11 11:51:16 +02001034 module_put(hi->host->driver->owner);
1035no_hi:
Stefan Richter138c8af2006-11-02 21:16:08 +01001036 kfree(lu);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037}
1038
1039#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
1040/*
Stefan Richtere8ca5662006-11-02 21:16:08 +01001041 * Deal with write requests on adapters which do not support physical DMA or
1042 * have it switched off.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043 */
Stefan Richtera237f352005-11-07 06:31:39 -05001044static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid,
1045 int destid, quadlet_t *data, u64 addr,
1046 size_t length, u16 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047{
Stefan Richtera237f352005-11-07 06:31:39 -05001048 memcpy(bus_to_virt((u32) addr), data, length);
Stefan Richtera237f352005-11-07 06:31:39 -05001049 return RCODE_COMPLETE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050}
1051
1052/*
Stefan Richtere8ca5662006-11-02 21:16:08 +01001053 * Deal with read requests on adapters which do not support physical DMA or
1054 * have it switched off.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001055 */
Stefan Richtera237f352005-11-07 06:31:39 -05001056static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid,
1057 quadlet_t *data, u64 addr, size_t length,
1058 u16 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059{
Stefan Richtera237f352005-11-07 06:31:39 -05001060 memcpy(data, bus_to_virt((u32) addr), length);
Stefan Richtera237f352005-11-07 06:31:39 -05001061 return RCODE_COMPLETE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001062}
1063#endif
1064
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065/**************************************
1066 * SBP-2 protocol related section
1067 **************************************/
1068
Stefan Richter138c8af2006-11-02 21:16:08 +01001069static int sbp2_query_logins(struct sbp2_lu *lu)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070{
Stefan Richter138c8af2006-11-02 21:16:08 +01001071 struct sbp2_fwhost_info *hi = lu->hi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072 quadlet_t data[2];
1073 int max_logins;
1074 int active_logins;
1075
Stefan Richter138c8af2006-11-02 21:16:08 +01001076 lu->query_logins_orb->reserved1 = 0x0;
1077 lu->query_logins_orb->reserved2 = 0x0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078
Stefan Richter138c8af2006-11-02 21:16:08 +01001079 lu->query_logins_orb->query_response_lo = lu->query_logins_response_dma;
1080 lu->query_logins_orb->query_response_hi =
1081 ORB_SET_NODE_ID(hi->host->node_id);
1082 lu->query_logins_orb->lun_misc =
1083 ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST);
1084 lu->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1);
1085 lu->query_logins_orb->lun_misc |= ORB_SET_LUN(lu->lun);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086
Stefan Richter138c8af2006-11-02 21:16:08 +01001087 lu->query_logins_orb->reserved_resp_length =
1088 ORB_SET_QUERY_LOGINS_RESP_LENGTH(
1089 sizeof(struct sbp2_query_logins_response));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090
Stefan Richter138c8af2006-11-02 21:16:08 +01001091 lu->query_logins_orb->status_fifo_hi =
1092 ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
1093 lu->query_logins_orb->status_fifo_lo =
1094 ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095
Stefan Richter138c8af2006-11-02 21:16:08 +01001096 sbp2util_cpu_to_be32_buffer(lu->query_logins_orb,
1097 sizeof(struct sbp2_query_logins_orb));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098
Stefan Richter138c8af2006-11-02 21:16:08 +01001099 memset(lu->query_logins_response, 0,
1100 sizeof(struct sbp2_query_logins_response));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
Stefan Richter138c8af2006-11-02 21:16:08 +01001103 data[1] = lu->query_logins_orb_dma;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104 sbp2util_cpu_to_be32_buffer(data, 8);
1105
Stefan Richter138c8af2006-11-02 21:16:08 +01001106 hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001107
Stefan Richter138c8af2006-11-02 21:16:08 +01001108 if (sbp2util_access_timeout(lu, 2*HZ)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
Stefan Richtera237f352005-11-07 06:31:39 -05001110 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111 }
1112
Stefan Richter138c8af2006-11-02 21:16:08 +01001113 if (lu->status_block.ORB_offset_lo != lu->query_logins_orb_dma) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001114 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
Stefan Richtera237f352005-11-07 06:31:39 -05001115 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116 }
1117
Stefan Richter138c8af2006-11-02 21:16:08 +01001118 if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) {
Stefan Richter60657722006-07-23 22:18:00 +02001119 SBP2_INFO("Error querying logins to SBP-2 device - failed");
Stefan Richtera237f352005-11-07 06:31:39 -05001120 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001121 }
1122
Stefan Richter138c8af2006-11-02 21:16:08 +01001123 sbp2util_cpu_to_be32_buffer(lu->query_logins_response,
1124 sizeof(struct sbp2_query_logins_response));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125
Stefan Richter138c8af2006-11-02 21:16:08 +01001126 max_logins = RESPONSE_GET_MAX_LOGINS(
1127 lu->query_logins_response->length_max_logins);
Ben Collins20f45782006-06-12 18:13:11 -04001128 SBP2_INFO("Maximum concurrent logins supported: %d", max_logins);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129
Stefan Richter138c8af2006-11-02 21:16:08 +01001130 active_logins = RESPONSE_GET_ACTIVE_LOGINS(
1131 lu->query_logins_response->length_max_logins);
Ben Collins20f45782006-06-12 18:13:11 -04001132 SBP2_INFO("Number of active logins: %d", active_logins);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133
1134 if (active_logins >= max_logins) {
Stefan Richtera237f352005-11-07 06:31:39 -05001135 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136 }
1137
1138 return 0;
1139}
1140
Stefan Richter138c8af2006-11-02 21:16:08 +01001141static int sbp2_login_device(struct sbp2_lu *lu)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142{
Stefan Richter138c8af2006-11-02 21:16:08 +01001143 struct sbp2_fwhost_info *hi = lu->hi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144 quadlet_t data[2];
1145
Stefan Richter138c8af2006-11-02 21:16:08 +01001146 if (!lu->login_orb)
Stefan Richtera237f352005-11-07 06:31:39 -05001147 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001148
Stefan Richter138c8af2006-11-02 21:16:08 +01001149 if (!sbp2_exclusive_login && sbp2_query_logins(lu)) {
Stefan Richterca0c7452006-11-02 21:16:08 +01001150 SBP2_INFO("Device does not support any more concurrent logins");
1151 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001152 }
1153
Stefan Richtere8ca5662006-11-02 21:16:08 +01001154 /* assume no password */
Stefan Richter138c8af2006-11-02 21:16:08 +01001155 lu->login_orb->password_hi = 0;
1156 lu->login_orb->password_lo = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001157
Stefan Richter138c8af2006-11-02 21:16:08 +01001158 lu->login_orb->login_response_lo = lu->login_response_dma;
1159 lu->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
1160 lu->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST);
Stefan Richtere8ca5662006-11-02 21:16:08 +01001161
1162 /* one second reconnect time */
Stefan Richter138c8af2006-11-02 21:16:08 +01001163 lu->login_orb->lun_misc |= ORB_SET_RECONNECT(0);
1164 lu->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(sbp2_exclusive_login);
1165 lu->login_orb->lun_misc |= ORB_SET_NOTIFY(1);
1166 lu->login_orb->lun_misc |= ORB_SET_LUN(lu->lun);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167
Stefan Richter138c8af2006-11-02 21:16:08 +01001168 lu->login_orb->passwd_resp_lengths =
Linus Torvalds1da177e2005-04-16 15:20:36 -07001169 ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001170
Stefan Richter138c8af2006-11-02 21:16:08 +01001171 lu->login_orb->status_fifo_hi =
1172 ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
1173 lu->login_orb->status_fifo_lo =
1174 ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001175
Stefan Richter138c8af2006-11-02 21:16:08 +01001176 sbp2util_cpu_to_be32_buffer(lu->login_orb,
1177 sizeof(struct sbp2_login_orb));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001178
Stefan Richter138c8af2006-11-02 21:16:08 +01001179 memset(lu->login_response, 0, sizeof(struct sbp2_login_response));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001180
Linus Torvalds1da177e2005-04-16 15:20:36 -07001181 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
Stefan Richter138c8af2006-11-02 21:16:08 +01001182 data[1] = lu->login_orb_dma;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001183 sbp2util_cpu_to_be32_buffer(data, 8);
1184
Stefan Richter138c8af2006-11-02 21:16:08 +01001185 hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001186
Stefan Richtere8ca5662006-11-02 21:16:08 +01001187 /* wait up to 20 seconds for login status */
Stefan Richter138c8af2006-11-02 21:16:08 +01001188 if (sbp2util_access_timeout(lu, 20*HZ)) {
Stefan Richtere8398bb2006-07-23 22:19:00 +02001189 SBP2_ERR("Error logging into SBP-2 device - timed out");
Stefan Richtera237f352005-11-07 06:31:39 -05001190 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001191 }
1192
Stefan Richtere8ca5662006-11-02 21:16:08 +01001193 /* make sure that the returned status matches the login ORB */
Stefan Richter138c8af2006-11-02 21:16:08 +01001194 if (lu->status_block.ORB_offset_lo != lu->login_orb_dma) {
Stefan Richter60657722006-07-23 22:18:00 +02001195 SBP2_ERR("Error logging into SBP-2 device - timed out");
Stefan Richtera237f352005-11-07 06:31:39 -05001196 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197 }
1198
Stefan Richter138c8af2006-11-02 21:16:08 +01001199 if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) {
Stefan Richter60657722006-07-23 22:18:00 +02001200 SBP2_ERR("Error logging into SBP-2 device - failed");
Stefan Richtera237f352005-11-07 06:31:39 -05001201 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001202 }
1203
Stefan Richter138c8af2006-11-02 21:16:08 +01001204 sbp2util_cpu_to_be32_buffer(lu->login_response,
1205 sizeof(struct sbp2_login_response));
1206 lu->command_block_agent_addr =
1207 ((u64)lu->login_response->command_block_agent_hi) << 32;
1208 lu->command_block_agent_addr |=
1209 ((u64)lu->login_response->command_block_agent_lo);
1210 lu->command_block_agent_addr &= 0x0000ffffffffffffULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001211
1212 SBP2_INFO("Logged into SBP-2 device");
Stefan Richtera237f352005-11-07 06:31:39 -05001213 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214}
1215
Stefan Richter138c8af2006-11-02 21:16:08 +01001216static int sbp2_logout_device(struct sbp2_lu *lu)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217{
Stefan Richter138c8af2006-11-02 21:16:08 +01001218 struct sbp2_fwhost_info *hi = lu->hi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219 quadlet_t data[2];
1220 int error;
1221
Stefan Richter138c8af2006-11-02 21:16:08 +01001222 lu->logout_orb->reserved1 = 0x0;
1223 lu->logout_orb->reserved2 = 0x0;
1224 lu->logout_orb->reserved3 = 0x0;
1225 lu->logout_orb->reserved4 = 0x0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001226
Stefan Richter138c8af2006-11-02 21:16:08 +01001227 lu->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST);
1228 lu->logout_orb->login_ID_misc |=
1229 ORB_SET_LOGIN_ID(lu->login_response->length_login_ID);
1230 lu->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231
Stefan Richter138c8af2006-11-02 21:16:08 +01001232 lu->logout_orb->reserved5 = 0x0;
1233 lu->logout_orb->status_fifo_hi =
1234 ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
1235 lu->logout_orb->status_fifo_lo =
1236 ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001237
Stefan Richter138c8af2006-11-02 21:16:08 +01001238 sbp2util_cpu_to_be32_buffer(lu->logout_orb,
1239 sizeof(struct sbp2_logout_orb));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
Stefan Richter138c8af2006-11-02 21:16:08 +01001242 data[1] = lu->logout_orb_dma;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243 sbp2util_cpu_to_be32_buffer(data, 8);
1244
Stefan Richter138c8af2006-11-02 21:16:08 +01001245 error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001246 if (error)
1247 return error;
1248
Stefan Richtere8ca5662006-11-02 21:16:08 +01001249 /* wait up to 1 second for the device to complete logout */
Stefan Richter138c8af2006-11-02 21:16:08 +01001250 if (sbp2util_access_timeout(lu, HZ))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001251 return -EIO;
1252
1253 SBP2_INFO("Logged out of SBP-2 device");
Stefan Richtera237f352005-11-07 06:31:39 -05001254 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001255}
1256
Stefan Richter138c8af2006-11-02 21:16:08 +01001257static int sbp2_reconnect_device(struct sbp2_lu *lu)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258{
Stefan Richter138c8af2006-11-02 21:16:08 +01001259 struct sbp2_fwhost_info *hi = lu->hi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260 quadlet_t data[2];
1261 int error;
1262
Stefan Richter138c8af2006-11-02 21:16:08 +01001263 lu->reconnect_orb->reserved1 = 0x0;
1264 lu->reconnect_orb->reserved2 = 0x0;
1265 lu->reconnect_orb->reserved3 = 0x0;
1266 lu->reconnect_orb->reserved4 = 0x0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001267
Stefan Richter138c8af2006-11-02 21:16:08 +01001268 lu->reconnect_orb->login_ID_misc =
1269 ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST);
1270 lu->reconnect_orb->login_ID_misc |=
1271 ORB_SET_LOGIN_ID(lu->login_response->length_login_ID);
1272 lu->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001273
Stefan Richter138c8af2006-11-02 21:16:08 +01001274 lu->reconnect_orb->reserved5 = 0x0;
1275 lu->reconnect_orb->status_fifo_hi =
1276 ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
1277 lu->reconnect_orb->status_fifo_lo =
1278 ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001279
Stefan Richter138c8af2006-11-02 21:16:08 +01001280 sbp2util_cpu_to_be32_buffer(lu->reconnect_orb,
1281 sizeof(struct sbp2_reconnect_orb));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282
Linus Torvalds1da177e2005-04-16 15:20:36 -07001283 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
Stefan Richter138c8af2006-11-02 21:16:08 +01001284 data[1] = lu->reconnect_orb_dma;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001285 sbp2util_cpu_to_be32_buffer(data, 8);
1286
Stefan Richter138c8af2006-11-02 21:16:08 +01001287 error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288 if (error)
1289 return error;
1290
Stefan Richtere8ca5662006-11-02 21:16:08 +01001291 /* wait up to 1 second for reconnect status */
Stefan Richter138c8af2006-11-02 21:16:08 +01001292 if (sbp2util_access_timeout(lu, HZ)) {
Stefan Richtere8398bb2006-07-23 22:19:00 +02001293 SBP2_ERR("Error reconnecting to SBP-2 device - timed out");
Stefan Richtera237f352005-11-07 06:31:39 -05001294 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001295 }
1296
Stefan Richtere8ca5662006-11-02 21:16:08 +01001297 /* make sure that the returned status matches the reconnect ORB */
Stefan Richter138c8af2006-11-02 21:16:08 +01001298 if (lu->status_block.ORB_offset_lo != lu->reconnect_orb_dma) {
Stefan Richter60657722006-07-23 22:18:00 +02001299 SBP2_ERR("Error reconnecting to SBP-2 device - timed out");
Stefan Richtera237f352005-11-07 06:31:39 -05001300 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301 }
1302
Stefan Richter138c8af2006-11-02 21:16:08 +01001303 if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) {
Stefan Richter60657722006-07-23 22:18:00 +02001304 SBP2_ERR("Error reconnecting to SBP-2 device - failed");
Stefan Richtera237f352005-11-07 06:31:39 -05001305 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306 }
1307
Stefan Richter35644092006-11-02 21:16:08 +01001308 SBP2_INFO("Reconnected to SBP-2 device");
Stefan Richtera237f352005-11-07 06:31:39 -05001309 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001310}
1311
1312/*
Stefan Richtere8ca5662006-11-02 21:16:08 +01001313 * Set the target node's Single Phase Retry limit. Affects the target's retry
1314 * behaviour if our node is too busy to accept requests.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315 */
Stefan Richter138c8af2006-11-02 21:16:08 +01001316static int sbp2_set_busy_timeout(struct sbp2_lu *lu)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001317{
1318 quadlet_t data;
1319
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320 data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE);
Stefan Richter138c8af2006-11-02 21:16:08 +01001321 if (hpsb_node_write(lu->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4))
Harvey Harrisonb1ce1fd2008-03-05 18:24:54 -08001322 SBP2_ERR("%s error", __func__);
Stefan Richtera237f352005-11-07 06:31:39 -05001323 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001324}
1325
Stefan Richter138c8af2006-11-02 21:16:08 +01001326static void sbp2_parse_unit_directory(struct sbp2_lu *lu,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001327 struct unit_directory *ud)
1328{
1329 struct csr1212_keyval *kv;
1330 struct csr1212_dentry *dentry;
1331 u64 management_agent_addr;
Stefan Richter9117c6d2006-11-02 21:16:08 +01001332 u32 unit_characteristics, firmware_revision;
Stefan Richter24d3bf82006-05-15 22:04:59 +02001333 unsigned workarounds;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001334 int i;
1335
Stefan Richter9117c6d2006-11-02 21:16:08 +01001336 management_agent_addr = 0;
1337 unit_characteristics = 0;
1338 firmware_revision = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339
Linus Torvalds1da177e2005-04-16 15:20:36 -07001340 csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) {
1341 switch (kv->key.id) {
1342 case CSR1212_KV_ID_DEPENDENT_INFO:
Stefan Richteredf1fb22006-11-02 21:16:08 +01001343 if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001344 management_agent_addr =
Stefan Richtera237f352005-11-07 06:31:39 -05001345 CSR1212_REGISTER_SPACE_BASE +
1346 (kv->value.csr_offset << 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001347
Stefan Richteredf1fb22006-11-02 21:16:08 +01001348 else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE)
Stefan Richter138c8af2006-11-02 21:16:08 +01001349 lu->lun = ORB_SET_LUN(kv->value.immediate);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001350 break;
1351
Linus Torvalds1da177e2005-04-16 15:20:36 -07001352 case SBP2_UNIT_CHARACTERISTICS_KEY:
Stefan Richtere8ca5662006-11-02 21:16:08 +01001353 /* FIXME: This is ignored so far.
1354 * See SBP-2 clause 7.4.8. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001355 unit_characteristics = kv->value.immediate;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001356 break;
1357
1358 case SBP2_FIRMWARE_REVISION_KEY:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001359 firmware_revision = kv->value.immediate;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360 break;
1361
1362 default:
Stefan Richtere8ca5662006-11-02 21:16:08 +01001363 /* FIXME: Check for SBP2_DEVICE_TYPE_AND_LUN_KEY.
1364 * Its "ordered" bit has consequences for command ORB
1365 * list handling. See SBP-2 clauses 4.6, 7.4.11, 10.2 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001366 break;
1367 }
1368 }
1369
Stefan Richter24d3bf82006-05-15 22:04:59 +02001370 workarounds = sbp2_default_workarounds;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001371
Stefan Richter679c0cd2006-05-15 22:08:09 +02001372 if (!(workarounds & SBP2_WORKAROUND_OVERRIDE))
1373 for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) {
Stefan Richter4618fd32006-12-30 15:37:09 +01001374 if (sbp2_workarounds_table[i].firmware_revision !=
1375 SBP2_ROM_VALUE_WILDCARD &&
Stefan Richter679c0cd2006-05-15 22:08:09 +02001376 sbp2_workarounds_table[i].firmware_revision !=
1377 (firmware_revision & 0xffff00))
1378 continue;
Stefan Richter4618fd32006-12-30 15:37:09 +01001379 if (sbp2_workarounds_table[i].model_id !=
1380 SBP2_ROM_VALUE_WILDCARD &&
Stefan Richter679c0cd2006-05-15 22:08:09 +02001381 sbp2_workarounds_table[i].model_id != ud->model_id)
1382 continue;
1383 workarounds |= sbp2_workarounds_table[i].workarounds;
1384 break;
1385 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386
Stefan Richter24d3bf82006-05-15 22:04:59 +02001387 if (workarounds)
Stefan Richtere9a1c522006-05-15 22:06:37 +02001388 SBP2_INFO("Workarounds for node " NODE_BUS_FMT ": 0x%x "
1389 "(firmware_revision 0x%06x, vendor_id 0x%06x,"
1390 " model_id 0x%06x)",
Stefan Richter24d3bf82006-05-15 22:04:59 +02001391 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid),
Stefan Richtere9a1c522006-05-15 22:06:37 +02001392 workarounds, firmware_revision,
1393 ud->vendor_id ? ud->vendor_id : ud->ne->vendor_id,
1394 ud->model_id);
Stefan Richter24d3bf82006-05-15 22:04:59 +02001395
1396 /* We would need one SCSI host template for each target to adjust
1397 * max_sectors on the fly, therefore warn only. */
1398 if (workarounds & SBP2_WORKAROUND_128K_MAX_TRANS &&
Stefan Richterca0c7452006-11-02 21:16:08 +01001399 (sbp2_max_sectors * 512) > (128 * 1024))
Stefan Richter35644092006-11-02 21:16:08 +01001400 SBP2_INFO("Node " NODE_BUS_FMT ": Bridge only supports 128KB "
Stefan Richter24d3bf82006-05-15 22:04:59 +02001401 "max transfer size. WARNING: Current max_sectors "
1402 "setting is larger than 128KB (%d sectors)",
1403 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid),
Stefan Richterca0c7452006-11-02 21:16:08 +01001404 sbp2_max_sectors);
Stefan Richter24d3bf82006-05-15 22:04:59 +02001405
Linus Torvalds1da177e2005-04-16 15:20:36 -07001406 /* If this is a logical unit directory entry, process the parent
1407 * to get the values. */
1408 if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) {
Stefan Richter138c8af2006-11-02 21:16:08 +01001409 struct unit_directory *parent_ud = container_of(
1410 ud->device.parent, struct unit_directory, device);
1411 sbp2_parse_unit_directory(lu, parent_ud);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001412 } else {
Stefan Richter138c8af2006-11-02 21:16:08 +01001413 lu->management_agent_addr = management_agent_addr;
1414 lu->workarounds = workarounds;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415 if (ud->flags & UNIT_DIRECTORY_HAS_LUN)
Stefan Richter138c8af2006-11-02 21:16:08 +01001416 lu->lun = ORB_SET_LUN(ud->lun);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001417 }
1418}
1419
Ben Collinsfd23ade2006-06-12 18:14:14 -04001420#define SBP2_PAYLOAD_TO_BYTES(p) (1 << ((p) + 2))
1421
Linus Torvalds1da177e2005-04-16 15:20:36 -07001422/*
1423 * This function is called in order to determine the max speed and packet
1424 * size we can use in our ORBs. Note, that we (the driver and host) only
1425 * initiate the transaction. The SBP-2 device actually transfers the data
1426 * (by reading from the DMA area we tell it). This means that the SBP-2
1427 * device decides the actual maximum data it can transfer. We just tell it
1428 * the speed that it needs to use, and the max_rec the host supports, and
1429 * it takes care of the rest.
1430 */
Stefan Richter138c8af2006-11-02 21:16:08 +01001431static int sbp2_max_speed_and_size(struct sbp2_lu *lu)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001432{
Stefan Richter138c8af2006-11-02 21:16:08 +01001433 struct sbp2_fwhost_info *hi = lu->hi;
Ben Collinsfd23ade2006-06-12 18:14:14 -04001434 u8 payload;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001435
Stefan Richter138c8af2006-11-02 21:16:08 +01001436 lu->speed_code = hi->host->speed[NODEID_TO_NODE(lu->ne->nodeid)];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001437
Stefan Richter138c8af2006-11-02 21:16:08 +01001438 if (lu->speed_code > sbp2_max_speed) {
1439 lu->speed_code = sbp2_max_speed;
Stefan Richterca0c7452006-11-02 21:16:08 +01001440 SBP2_INFO("Reducing speed to %s",
1441 hpsb_speedto_str[sbp2_max_speed]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001442 }
1443
1444 /* Payload size is the lesser of what our speed supports and what
1445 * our host supports. */
Stefan Richter138c8af2006-11-02 21:16:08 +01001446 payload = min(sbp2_speedto_max_payload[lu->speed_code],
Ben Collinsfd23ade2006-06-12 18:14:14 -04001447 (u8) (hi->host->csr.max_rec - 1));
1448
1449 /* If physical DMA is off, work around limitation in ohci1394:
1450 * packet size must not exceed PAGE_SIZE */
Stefan Richter138c8af2006-11-02 21:16:08 +01001451 if (lu->ne->host->low_addr_space < (1ULL << 32))
Ben Collinsfd23ade2006-06-12 18:14:14 -04001452 while (SBP2_PAYLOAD_TO_BYTES(payload) + 24 > PAGE_SIZE &&
1453 payload)
1454 payload--;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001455
Stefan Richter35644092006-11-02 21:16:08 +01001456 SBP2_INFO("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]",
Stefan Richter138c8af2006-11-02 21:16:08 +01001457 NODE_BUS_ARGS(hi->host, lu->ne->nodeid),
1458 hpsb_speedto_str[lu->speed_code],
Stefan Richter35644092006-11-02 21:16:08 +01001459 SBP2_PAYLOAD_TO_BYTES(payload));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001460
Stefan Richter138c8af2006-11-02 21:16:08 +01001461 lu->max_payload_size = payload;
Stefan Richtera237f352005-11-07 06:31:39 -05001462 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001463}
1464
Stefan Richter138c8af2006-11-02 21:16:08 +01001465static int sbp2_agent_reset(struct sbp2_lu *lu, int wait)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001466{
1467 quadlet_t data;
1468 u64 addr;
1469 int retval;
Stefan Richtercc078182006-07-23 22:12:00 +02001470 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001471
Stefan Richterec9b7e12006-12-07 23:23:25 +01001472 /* flush lu->protocol_work */
Stefan Richter09ee67a2006-08-14 18:43:00 +02001473 if (wait)
1474 flush_scheduled_work();
1475
Linus Torvalds1da177e2005-04-16 15:20:36 -07001476 data = ntohl(SBP2_AGENT_RESET_DATA);
Stefan Richter138c8af2006-11-02 21:16:08 +01001477 addr = lu->command_block_agent_addr + SBP2_AGENT_RESET_OFFSET;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001478
1479 if (wait)
Stefan Richter138c8af2006-11-02 21:16:08 +01001480 retval = hpsb_node_write(lu->ne, addr, &data, 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001481 else
Stefan Richter138c8af2006-11-02 21:16:08 +01001482 retval = sbp2util_node_write_no_wait(lu->ne, addr, &data, 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001483
1484 if (retval < 0) {
1485 SBP2_ERR("hpsb_node_write failed.\n");
1486 return -EIO;
1487 }
1488
Stefan Richtere8ca5662006-11-02 21:16:08 +01001489 /* make sure that the ORB_POINTER is written on next command */
Stefan Richter138c8af2006-11-02 21:16:08 +01001490 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1491 lu->last_orb = NULL;
1492 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001493
Stefan Richtera237f352005-11-07 06:31:39 -05001494 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001495}
1496
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001497static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb,
Stefan Richterca0c7452006-11-02 21:16:08 +01001498 struct sbp2_fwhost_info *hi,
Stefan Richter138c8af2006-11-02 21:16:08 +01001499 struct sbp2_command_info *cmd,
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001500 unsigned int scsi_use_sg,
Stefan Richter825f1df2007-11-04 14:59:24 +01001501 struct scatterlist *sg,
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001502 u32 orb_direction,
1503 enum dma_data_direction dma_dir)
1504{
Stefan Richter138c8af2006-11-02 21:16:08 +01001505 cmd->dma_dir = dma_dir;
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001506 orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1507 orb->misc |= ORB_SET_DIRECTION(orb_direction);
1508
Stefan Richtere8ca5662006-11-02 21:16:08 +01001509 /* special case if only one element (and less than 64KB in size) */
Stefan Richter5fcf5002008-02-01 22:31:10 +01001510 if (scsi_use_sg == 1 && sg->length <= SBP2_MAX_SG_ELEMENT_LENGTH) {
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001511
Stefan Richter5fcf5002008-02-01 22:31:10 +01001512 cmd->dma_size = sg->length;
Stefan Richter138c8af2006-11-02 21:16:08 +01001513 cmd->dma_type = CMD_DMA_PAGE;
Stefan Richter97d552e2006-12-29 23:47:04 +01001514 cmd->cmd_dma = dma_map_page(hi->host->device.parent,
Stefan Richter825f1df2007-11-04 14:59:24 +01001515 sg_page(sg), sg->offset,
Stefan Richter138c8af2006-11-02 21:16:08 +01001516 cmd->dma_size, cmd->dma_dir);
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001517
Stefan Richter138c8af2006-11-02 21:16:08 +01001518 orb->data_descriptor_lo = cmd->cmd_dma;
1519 orb->misc |= ORB_SET_DATA_SIZE(cmd->dma_size);
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001520
1521 } else {
1522 struct sbp2_unrestricted_page_table *sg_element =
Stefan Richter138c8af2006-11-02 21:16:08 +01001523 &cmd->scatter_gather_element[0];
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001524 u32 sg_count, sg_len;
1525 dma_addr_t sg_addr;
Stefan Richter825f1df2007-11-04 14:59:24 +01001526 int i, count = dma_map_sg(hi->host->device.parent, sg,
Stefan Richter97d552e2006-12-29 23:47:04 +01001527 scsi_use_sg, dma_dir);
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001528
Stefan Richter138c8af2006-11-02 21:16:08 +01001529 cmd->dma_size = scsi_use_sg;
Stefan Richter825f1df2007-11-04 14:59:24 +01001530 cmd->sge_buffer = sg;
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001531
1532 /* use page tables (s/g) */
1533 orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
Stefan Richter138c8af2006-11-02 21:16:08 +01001534 orb->data_descriptor_lo = cmd->sge_dma;
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001535
Stefan Richtere8ca5662006-11-02 21:16:08 +01001536 /* loop through and fill out our SBP-2 page tables
1537 * (and split up anything too large) */
Stefan Richter825f1df2007-11-04 14:59:24 +01001538 for (i = 0, sg_count = 0; i < count; i++, sg = sg_next(sg)) {
1539 sg_len = sg_dma_len(sg);
1540 sg_addr = sg_dma_address(sg);
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001541 while (sg_len) {
1542 sg_element[sg_count].segment_base_lo = sg_addr;
1543 if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
1544 sg_element[sg_count].length_segment_base_hi =
1545 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
1546 sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
1547 sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
1548 } else {
1549 sg_element[sg_count].length_segment_base_hi =
1550 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
1551 sg_len = 0;
1552 }
1553 sg_count++;
1554 }
1555 }
1556
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001557 orb->misc |= ORB_SET_DATA_SIZE(sg_count);
1558
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001559 sbp2util_cpu_to_be32_buffer(sg_element,
Stefan Richter138c8af2006-11-02 21:16:08 +01001560 (sizeof(struct sbp2_unrestricted_page_table)) *
1561 sg_count);
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001562 }
1563}
1564
Stefan Richter138c8af2006-11-02 21:16:08 +01001565static void sbp2_create_command_orb(struct sbp2_lu *lu,
1566 struct sbp2_command_info *cmd,
Stefan Richter93c596f2008-05-04 16:54:14 +02001567 struct scsi_cmnd *SCpnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001568{
Stefan Richter138c8af2006-11-02 21:16:08 +01001569 struct sbp2_fwhost_info *hi = lu->hi;
Stefan Richter138c8af2006-11-02 21:16:08 +01001570 struct sbp2_command_orb *orb = &cmd->command_orb;
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001571 u32 orb_direction;
Stefan Richter93c596f2008-05-04 16:54:14 +02001572 unsigned int scsi_request_bufflen = scsi_bufflen(SCpnt);
1573 enum dma_data_direction dma_dir = SCpnt->sc_data_direction;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001574
1575 /*
Stefan Richtere8ca5662006-11-02 21:16:08 +01001576 * Set-up our command ORB.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001577 *
1578 * NOTE: We're doing unrestricted page tables (s/g), as this is
1579 * best performance (at least with the devices I have). This means
1580 * that data_size becomes the number of s/g elements, and
1581 * page_size should be zero (for unrestricted).
1582 */
Stefan Richter138c8af2006-11-02 21:16:08 +01001583 orb->next_ORB_hi = ORB_SET_NULL_PTR(1);
1584 orb->next_ORB_lo = 0x0;
1585 orb->misc = ORB_SET_MAX_PAYLOAD(lu->max_payload_size);
1586 orb->misc |= ORB_SET_SPEED(lu->speed_code);
1587 orb->misc |= ORB_SET_NOTIFY(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001588
Stefan Richter43863eb2005-12-12 23:03:24 -05001589 if (dma_dir == DMA_NONE)
Stefan Richtera237f352005-11-07 06:31:39 -05001590 orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
Stefan Richter43863eb2005-12-12 23:03:24 -05001591 else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen)
Stefan Richtera237f352005-11-07 06:31:39 -05001592 orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA;
Stefan Richter43863eb2005-12-12 23:03:24 -05001593 else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen)
Stefan Richtera237f352005-11-07 06:31:39 -05001594 orb_direction = ORB_DIRECTION_READ_FROM_MEDIA;
Stefan Richter43863eb2005-12-12 23:03:24 -05001595 else {
Stefan Richter35644092006-11-02 21:16:08 +01001596 SBP2_INFO("Falling back to DMA_NONE");
Stefan Richter43863eb2005-12-12 23:03:24 -05001597 orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001598 }
1599
Stefan Richtere8ca5662006-11-02 21:16:08 +01001600 /* set up our page table stuff */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001601 if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) {
Stefan Richter138c8af2006-11-02 21:16:08 +01001602 orb->data_descriptor_hi = 0x0;
1603 orb->data_descriptor_lo = 0x0;
1604 orb->misc |= ORB_SET_DIRECTION(1);
FUJITA Tomonorid7dea2c2007-05-14 20:00:04 +09001605 } else
Stefan Richter93c596f2008-05-04 16:54:14 +02001606 sbp2_prep_command_orb_sg(orb, hi, cmd, scsi_sg_count(SCpnt),
1607 scsi_sglist(SCpnt),
Stefan Richter138c8af2006-11-02 21:16:08 +01001608 orb_direction, dma_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001609
Stefan Richter138c8af2006-11-02 21:16:08 +01001610 sbp2util_cpu_to_be32_buffer(orb, sizeof(*orb));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001611
Stefan Richter93c596f2008-05-04 16:54:14 +02001612 memset(orb->cdb, 0, sizeof(orb->cdb));
1613 memcpy(orb->cdb, SCpnt->cmnd, SCpnt->cmd_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001614}
1615
Stefan Richter138c8af2006-11-02 21:16:08 +01001616static void sbp2_link_orb_command(struct sbp2_lu *lu,
1617 struct sbp2_command_info *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001618{
Stefan Richter138c8af2006-11-02 21:16:08 +01001619 struct sbp2_fwhost_info *hi = lu->hi;
Stefan Richtercc078182006-07-23 22:12:00 +02001620 struct sbp2_command_orb *last_orb;
1621 dma_addr_t last_orb_dma;
Stefan Richter138c8af2006-11-02 21:16:08 +01001622 u64 addr = lu->command_block_agent_addr;
Stefan Richtercc078182006-07-23 22:12:00 +02001623 quadlet_t data[2];
1624 size_t length;
1625 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001626
Stefan Richter97d552e2006-12-29 23:47:04 +01001627 dma_sync_single_for_device(hi->host->device.parent,
1628 cmd->command_orb_dma,
Stefan Richter9b7d9c02006-11-22 21:44:34 +01001629 sizeof(struct sbp2_command_orb),
1630 DMA_TO_DEVICE);
Stefan Richter97d552e2006-12-29 23:47:04 +01001631 dma_sync_single_for_device(hi->host->device.parent, cmd->sge_dma,
Stefan Richter9b7d9c02006-11-22 21:44:34 +01001632 sizeof(cmd->scatter_gather_element),
Stefan Richter2446a792007-02-04 20:54:57 +01001633 DMA_TO_DEVICE);
Stefan Richtere8ca5662006-11-02 21:16:08 +01001634
1635 /* check to see if there are any previous orbs to use */
Stefan Richter138c8af2006-11-02 21:16:08 +01001636 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1637 last_orb = lu->last_orb;
1638 last_orb_dma = lu->last_orb_dma;
Stefan Richtercc078182006-07-23 22:12:00 +02001639 if (!last_orb) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001640 /*
Stefan Richtercc078182006-07-23 22:12:00 +02001641 * last_orb == NULL means: We know that the target's fetch agent
1642 * is not active right now.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001643 */
Stefan Richtercc078182006-07-23 22:12:00 +02001644 addr += SBP2_ORB_POINTER_OFFSET;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001645 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
Stefan Richter138c8af2006-11-02 21:16:08 +01001646 data[1] = cmd->command_orb_dma;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001647 sbp2util_cpu_to_be32_buffer(data, 8);
Stefan Richtercc078182006-07-23 22:12:00 +02001648 length = 8;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001649 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001650 /*
Stefan Richtercc078182006-07-23 22:12:00 +02001651 * last_orb != NULL means: We know that the target's fetch agent
1652 * is (very probably) not dead or in reset state right now.
1653 * We have an ORB already sent that we can append a new one to.
1654 * The target's fetch agent may or may not have read this
1655 * previous ORB yet.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001656 */
Stefan Richter97d552e2006-12-29 23:47:04 +01001657 dma_sync_single_for_cpu(hi->host->device.parent, last_orb_dma,
Stefan Richter9b7d9c02006-11-22 21:44:34 +01001658 sizeof(struct sbp2_command_orb),
1659 DMA_TO_DEVICE);
Stefan Richter138c8af2006-11-02 21:16:08 +01001660 last_orb->next_ORB_lo = cpu_to_be32(cmd->command_orb_dma);
Stefan Richtercc078182006-07-23 22:12:00 +02001661 wmb();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001662 /* Tells hardware that this pointer is valid */
Stefan Richtercc078182006-07-23 22:12:00 +02001663 last_orb->next_ORB_hi = 0;
Stefan Richter97d552e2006-12-29 23:47:04 +01001664 dma_sync_single_for_device(hi->host->device.parent,
1665 last_orb_dma,
Stefan Richter9b7d9c02006-11-22 21:44:34 +01001666 sizeof(struct sbp2_command_orb),
1667 DMA_TO_DEVICE);
Stefan Richtercc078182006-07-23 22:12:00 +02001668 addr += SBP2_DOORBELL_OFFSET;
1669 data[0] = 0;
1670 length = 4;
1671 }
Stefan Richter138c8af2006-11-02 21:16:08 +01001672 lu->last_orb = &cmd->command_orb;
1673 lu->last_orb_dma = cmd->command_orb_dma;
1674 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001675
Stefan Richter138c8af2006-11-02 21:16:08 +01001676 if (sbp2util_node_write_no_wait(lu->ne, addr, data, length)) {
Stefan Richter09ee67a2006-08-14 18:43:00 +02001677 /*
1678 * sbp2util_node_write_no_wait failed. We certainly ran out
1679 * of transaction labels, perhaps just because there were no
1680 * context switches which gave khpsbpkt a chance to collect
1681 * free tlabels. Try again in non-atomic context. If necessary,
1682 * the workqueue job will sleep to guaranteedly get a tlabel.
1683 * We do not accept new commands until the job is over.
1684 */
Stefan Richter138c8af2006-11-02 21:16:08 +01001685 scsi_block_requests(lu->shost);
1686 PREPARE_WORK(&lu->protocol_work,
Stefan Richter09ee67a2006-08-14 18:43:00 +02001687 last_orb ? sbp2util_write_doorbell:
Stefan Richterec9b7e12006-12-07 23:23:25 +01001688 sbp2util_write_orb_pointer);
Stefan Richter138c8af2006-11-02 21:16:08 +01001689 schedule_work(&lu->protocol_work);
Stefan Richter09ee67a2006-08-14 18:43:00 +02001690 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001691}
1692
Stefan Richter138c8af2006-11-02 21:16:08 +01001693static int sbp2_send_command(struct sbp2_lu *lu, struct scsi_cmnd *SCpnt,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001694 void (*done)(struct scsi_cmnd *))
1695{
Stefan Richter138c8af2006-11-02 21:16:08 +01001696 struct sbp2_command_info *cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001697
Stefan Richter138c8af2006-11-02 21:16:08 +01001698 cmd = sbp2util_allocate_command_orb(lu, SCpnt, done);
1699 if (!cmd)
Stefan Richtera237f352005-11-07 06:31:39 -05001700 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001701
Stefan Richter93c596f2008-05-04 16:54:14 +02001702 sbp2_create_command_orb(lu, cmd, SCpnt);
Stefan Richter138c8af2006-11-02 21:16:08 +01001703 sbp2_link_orb_command(lu, cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001704
Stefan Richtera237f352005-11-07 06:31:39 -05001705 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001706}
1707
Linus Torvalds1da177e2005-04-16 15:20:36 -07001708/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001709 * Translates SBP-2 status into SCSI sense data for check conditions
1710 */
Stefan Richter138c8af2006-11-02 21:16:08 +01001711static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status,
1712 unchar *sense_data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001713{
Stefan Richtere8ca5662006-11-02 21:16:08 +01001714 /* OK, it's pretty ugly... ;-) */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001715 sense_data[0] = 0x70;
1716 sense_data[1] = 0x0;
1717 sense_data[2] = sbp2_status[9];
1718 sense_data[3] = sbp2_status[12];
1719 sense_data[4] = sbp2_status[13];
1720 sense_data[5] = sbp2_status[14];
1721 sense_data[6] = sbp2_status[15];
1722 sense_data[7] = 10;
1723 sense_data[8] = sbp2_status[16];
1724 sense_data[9] = sbp2_status[17];
1725 sense_data[10] = sbp2_status[18];
1726 sense_data[11] = sbp2_status[19];
1727 sense_data[12] = sbp2_status[10];
1728 sense_data[13] = sbp2_status[11];
1729 sense_data[14] = sbp2_status[20];
1730 sense_data[15] = sbp2_status[21];
1731
Stefan Richtere8ca5662006-11-02 21:16:08 +01001732 return sbp2_status[8] & 0x3f;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001733}
1734
Stefan Richter3e98eab42006-07-23 22:16:00 +02001735static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid,
1736 int destid, quadlet_t *data, u64 addr,
1737 size_t length, u16 fl)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001738{
Stefan Richterca0c7452006-11-02 21:16:08 +01001739 struct sbp2_fwhost_info *hi;
Stefan Richter138c8af2006-11-02 21:16:08 +01001740 struct sbp2_lu *lu = NULL, *lu_tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001741 struct scsi_cmnd *SCpnt = NULL;
Stefan Richter3e98eab42006-07-23 22:16:00 +02001742 struct sbp2_status_block *sb;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001743 u32 scsi_status = SBP2_SCSI_STATUS_GOOD;
Stefan Richter138c8af2006-11-02 21:16:08 +01001744 struct sbp2_command_info *cmd;
Jody McIntyre79456192005-11-07 06:29:39 -05001745 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001746
Stefan Richter60657722006-07-23 22:18:00 +02001747 if (unlikely(length < 8 || length > sizeof(struct sbp2_status_block))) {
1748 SBP2_ERR("Wrong size of status block");
1749 return RCODE_ADDRESS_ERROR;
1750 }
1751 if (unlikely(!host)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001752 SBP2_ERR("host is NULL - this is bad!");
Stefan Richtera237f352005-11-07 06:31:39 -05001753 return RCODE_ADDRESS_ERROR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001754 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001755 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
Stefan Richter60657722006-07-23 22:18:00 +02001756 if (unlikely(!hi)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001757 SBP2_ERR("host info is NULL - this is bad!");
Stefan Richtera237f352005-11-07 06:31:39 -05001758 return RCODE_ADDRESS_ERROR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001759 }
Stefan Richtere8ca5662006-11-02 21:16:08 +01001760
1761 /* Find the unit which wrote the status. */
Stefan Richter261b5f62007-08-11 11:52:08 +02001762 read_lock_irqsave(&sbp2_hi_logical_units_lock, flags);
Stefan Richter138c8af2006-11-02 21:16:08 +01001763 list_for_each_entry(lu_tmp, &hi->logical_units, lu_list) {
1764 if (lu_tmp->ne->nodeid == nodeid &&
1765 lu_tmp->status_fifo_addr == addr) {
1766 lu = lu_tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001767 break;
1768 }
1769 }
Stefan Richter261b5f62007-08-11 11:52:08 +02001770 read_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags);
1771
Stefan Richter138c8af2006-11-02 21:16:08 +01001772 if (unlikely(!lu)) {
1773 SBP2_ERR("lu is NULL - device is gone?");
Stefan Richtera237f352005-11-07 06:31:39 -05001774 return RCODE_ADDRESS_ERROR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001775 }
1776
Stefan Richter138c8af2006-11-02 21:16:08 +01001777 /* Put response into lu status fifo buffer. The first two bytes
Stefan Richter3e98eab42006-07-23 22:16:00 +02001778 * come in big endian bit order. Often the target writes only a
1779 * truncated status block, minimally the first two quadlets. The rest
Stefan Richtere8ca5662006-11-02 21:16:08 +01001780 * is implied to be zeros. */
Stefan Richter138c8af2006-11-02 21:16:08 +01001781 sb = &lu->status_block;
Stefan Richter3e98eab42006-07-23 22:16:00 +02001782 memset(sb->command_set_dependent, 0, sizeof(sb->command_set_dependent));
1783 memcpy(sb, data, length);
1784 sbp2util_be32_to_cpu_buffer(sb, 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001785
Stefan Richtere8ca5662006-11-02 21:16:08 +01001786 /* Ignore unsolicited status. Handle command ORB status. */
Stefan Richter60657722006-07-23 22:18:00 +02001787 if (unlikely(STATUS_GET_SRC(sb->ORB_offset_hi_misc) == 2))
Stefan Richter138c8af2006-11-02 21:16:08 +01001788 cmd = NULL;
Stefan Richter60657722006-07-23 22:18:00 +02001789 else
Stefan Richter138c8af2006-11-02 21:16:08 +01001790 cmd = sbp2util_find_command_for_orb(lu, sb->ORB_offset_lo);
1791 if (cmd) {
Stefan Richter97d552e2006-12-29 23:47:04 +01001792 dma_sync_single_for_cpu(hi->host->device.parent,
1793 cmd->command_orb_dma,
Stefan Richter9b7d9c02006-11-22 21:44:34 +01001794 sizeof(struct sbp2_command_orb),
1795 DMA_TO_DEVICE);
Stefan Richter97d552e2006-12-29 23:47:04 +01001796 dma_sync_single_for_cpu(hi->host->device.parent, cmd->sge_dma,
Stefan Richter9b7d9c02006-11-22 21:44:34 +01001797 sizeof(cmd->scatter_gather_element),
Stefan Richter2446a792007-02-04 20:54:57 +01001798 DMA_TO_DEVICE);
Stefan Richtere8ca5662006-11-02 21:16:08 +01001799 /* Grab SCSI command pointers and check status. */
Stefan Richter60657722006-07-23 22:18:00 +02001800 /*
1801 * FIXME: If the src field in the status is 1, the ORB DMA must
1802 * not be reused until status for a subsequent ORB is received.
1803 */
Stefan Richter138c8af2006-11-02 21:16:08 +01001804 SCpnt = cmd->Current_SCpnt;
1805 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1806 sbp2util_mark_command_completed(lu, cmd);
1807 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001808
1809 if (SCpnt) {
Stefan Richterabbca102006-08-14 18:51:00 +02001810 u32 h = sb->ORB_offset_hi_misc;
1811 u32 r = STATUS_GET_RESP(h);
1812
1813 if (r != RESP_STATUS_REQUEST_COMPLETE) {
Stefan Richter35644092006-11-02 21:16:08 +01001814 SBP2_INFO("resp 0x%x, sbp_status 0x%x",
Stefan Richterabbca102006-08-14 18:51:00 +02001815 r, STATUS_GET_SBP_STATUS(h));
Stefan Richter60657722006-07-23 22:18:00 +02001816 scsi_status =
Stefan Richterabbca102006-08-14 18:51:00 +02001817 r == RESP_STATUS_TRANSPORT_FAILURE ?
1818 SBP2_SCSI_STATUS_BUSY :
Stefan Richter60657722006-07-23 22:18:00 +02001819 SBP2_SCSI_STATUS_COMMAND_TERMINATED;
Stefan Richterabbca102006-08-14 18:51:00 +02001820 }
Stefan Richtere8ca5662006-11-02 21:16:08 +01001821
Stefan Richteredf1fb22006-11-02 21:16:08 +01001822 if (STATUS_GET_LEN(h) > 1)
Stefan Richter3e98eab42006-07-23 22:16:00 +02001823 scsi_status = sbp2_status_to_sense_data(
1824 (unchar *)sb, SCpnt->sense_buffer);
Stefan Richtere8ca5662006-11-02 21:16:08 +01001825
Stefan Richteredf1fb22006-11-02 21:16:08 +01001826 if (STATUS_TEST_DEAD(h))
Stefan Richter138c8af2006-11-02 21:16:08 +01001827 sbp2_agent_reset(lu, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001828 }
1829
Stefan Richtere8ca5662006-11-02 21:16:08 +01001830 /* Check here to see if there are no commands in-use. If there
Stefan Richtercc078182006-07-23 22:12:00 +02001831 * are none, we know that the fetch agent left the active state
1832 * _and_ that we did not reactivate it yet. Therefore clear
1833 * last_orb so that next time we write directly to the
1834 * ORB_POINTER register. That way the fetch agent does not need
Stefan Richtere8ca5662006-11-02 21:16:08 +01001835 * to refetch the next_ORB. */
Stefan Richter138c8af2006-11-02 21:16:08 +01001836 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1837 if (list_empty(&lu->cmd_orb_inuse))
1838 lu->last_orb = NULL;
1839 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001840
1841 } else {
Stefan Richtere8ca5662006-11-02 21:16:08 +01001842 /* It's probably status after a management request. */
Stefan Richter138c8af2006-11-02 21:16:08 +01001843 if ((sb->ORB_offset_lo == lu->reconnect_orb_dma) ||
1844 (sb->ORB_offset_lo == lu->login_orb_dma) ||
1845 (sb->ORB_offset_lo == lu->query_logins_orb_dma) ||
1846 (sb->ORB_offset_lo == lu->logout_orb_dma)) {
1847 lu->access_complete = 1;
Stefan Richterca0c7452006-11-02 21:16:08 +01001848 wake_up_interruptible(&sbp2_access_wq);
Stefan Richtere8398bb2006-07-23 22:19:00 +02001849 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001850 }
1851
Stefan Richteredf1fb22006-11-02 21:16:08 +01001852 if (SCpnt)
Stefan Richter138c8af2006-11-02 21:16:08 +01001853 sbp2scsi_complete_command(lu, scsi_status, SCpnt,
1854 cmd->Current_done);
Stefan Richtera237f352005-11-07 06:31:39 -05001855 return RCODE_COMPLETE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001856}
1857
Linus Torvalds1da177e2005-04-16 15:20:36 -07001858/**************************************
1859 * SCSI interface related section
1860 **************************************/
1861
Linus Torvalds1da177e2005-04-16 15:20:36 -07001862static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt,
1863 void (*done)(struct scsi_cmnd *))
1864{
Stefan Richter138c8af2006-11-02 21:16:08 +01001865 struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0];
Stefan Richterca0c7452006-11-02 21:16:08 +01001866 struct sbp2_fwhost_info *hi;
Jody McIntyreabd559b2005-09-30 11:59:06 -07001867 int result = DID_NO_CONNECT << 16;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001868
Stefan Richter138c8af2006-11-02 21:16:08 +01001869 if (unlikely(!sbp2util_node_is_available(lu)))
Jody McIntyreabd559b2005-09-30 11:59:06 -07001870 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001871
Stefan Richter138c8af2006-11-02 21:16:08 +01001872 hi = lu->hi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001873
Stefan Richter5796aa72006-11-02 21:16:08 +01001874 if (unlikely(!hi)) {
Stefan Richterca0c7452006-11-02 21:16:08 +01001875 SBP2_ERR("sbp2_fwhost_info is NULL - this is bad!");
Jody McIntyreabd559b2005-09-30 11:59:06 -07001876 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001877 }
1878
Stefan Richtere8ca5662006-11-02 21:16:08 +01001879 /* Multiple units are currently represented to the SCSI core as separate
1880 * targets, not as one target with multiple LUs. Therefore return
1881 * selection time-out to any IO directed at non-zero LUNs. */
Stefan Richter5796aa72006-11-02 21:16:08 +01001882 if (unlikely(SCpnt->device->lun))
Jody McIntyreabd559b2005-09-30 11:59:06 -07001883 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001884
Stefan Richter138c8af2006-11-02 21:16:08 +01001885 if (unlikely(!hpsb_node_entry_valid(lu->ne))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001886 SBP2_ERR("Bus reset in progress - rejecting command");
Jody McIntyreabd559b2005-09-30 11:59:06 -07001887 result = DID_BUS_BUSY << 16;
1888 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001889 }
1890
Stefan Richtere8ca5662006-11-02 21:16:08 +01001891 /* Bidirectional commands are not yet implemented,
1892 * and unknown transfer direction not handled. */
Stefan Richter5796aa72006-11-02 21:16:08 +01001893 if (unlikely(SCpnt->sc_data_direction == DMA_BIDIRECTIONAL)) {
Stefan Richter43863eb2005-12-12 23:03:24 -05001894 SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command");
1895 result = DID_ERROR << 16;
1896 goto done;
1897 }
1898
Stefan Richter138c8af2006-11-02 21:16:08 +01001899 if (sbp2_send_command(lu, SCpnt, done)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001900 SBP2_ERR("Error sending SCSI command");
Stefan Richter138c8af2006-11-02 21:16:08 +01001901 sbp2scsi_complete_command(lu,
1902 SBP2_SCSI_STATUS_SELECTION_TIMEOUT,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001903 SCpnt, done);
1904 }
Jody McIntyreabd559b2005-09-30 11:59:06 -07001905 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001906
Jody McIntyreabd559b2005-09-30 11:59:06 -07001907done:
1908 SCpnt->result = result;
1909 done(SCpnt);
1910 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001911}
1912
Stefan Richter138c8af2006-11-02 21:16:08 +01001913static void sbp2scsi_complete_all_commands(struct sbp2_lu *lu, u32 status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001914{
Stefan Richter138c8af2006-11-02 21:16:08 +01001915 struct sbp2_fwhost_info *hi = lu->hi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001916 struct list_head *lh;
Stefan Richter138c8af2006-11-02 21:16:08 +01001917 struct sbp2_command_info *cmd;
Jody McIntyre79456192005-11-07 06:29:39 -05001918 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001919
Stefan Richter138c8af2006-11-02 21:16:08 +01001920 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1921 while (!list_empty(&lu->cmd_orb_inuse)) {
1922 lh = lu->cmd_orb_inuse.next;
1923 cmd = list_entry(lh, struct sbp2_command_info, list);
Stefan Richter97d552e2006-12-29 23:47:04 +01001924 dma_sync_single_for_cpu(hi->host->device.parent,
1925 cmd->command_orb_dma,
Stefan Richter9b7d9c02006-11-22 21:44:34 +01001926 sizeof(struct sbp2_command_orb),
1927 DMA_TO_DEVICE);
Stefan Richter97d552e2006-12-29 23:47:04 +01001928 dma_sync_single_for_cpu(hi->host->device.parent, cmd->sge_dma,
Stefan Richter9b7d9c02006-11-22 21:44:34 +01001929 sizeof(cmd->scatter_gather_element),
Stefan Richter2446a792007-02-04 20:54:57 +01001930 DMA_TO_DEVICE);
Stefan Richter138c8af2006-11-02 21:16:08 +01001931 sbp2util_mark_command_completed(lu, cmd);
1932 if (cmd->Current_SCpnt) {
1933 cmd->Current_SCpnt->result = status << 16;
1934 cmd->Current_done(cmd->Current_SCpnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001935 }
1936 }
Stefan Richter138c8af2006-11-02 21:16:08 +01001937 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001938
1939 return;
1940}
1941
1942/*
Stefan Richtere8ca5662006-11-02 21:16:08 +01001943 * Complete a regular SCSI command. Can be called in atomic context.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001944 */
Stefan Richter138c8af2006-11-02 21:16:08 +01001945static void sbp2scsi_complete_command(struct sbp2_lu *lu, u32 scsi_status,
1946 struct scsi_cmnd *SCpnt,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001947 void (*done)(struct scsi_cmnd *))
1948{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001949 if (!SCpnt) {
1950 SBP2_ERR("SCpnt is NULL");
1951 return;
1952 }
1953
Linus Torvalds1da177e2005-04-16 15:20:36 -07001954 switch (scsi_status) {
Stefan Richtera237f352005-11-07 06:31:39 -05001955 case SBP2_SCSI_STATUS_GOOD:
Stefan Richter8f0525f2006-03-28 20:03:45 -05001956 SCpnt->result = DID_OK << 16;
Stefan Richtera237f352005-11-07 06:31:39 -05001957 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001958
Stefan Richtera237f352005-11-07 06:31:39 -05001959 case SBP2_SCSI_STATUS_BUSY:
1960 SBP2_ERR("SBP2_SCSI_STATUS_BUSY");
1961 SCpnt->result = DID_BUS_BUSY << 16;
1962 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001963
Stefan Richtera237f352005-11-07 06:31:39 -05001964 case SBP2_SCSI_STATUS_CHECK_CONDITION:
Stefan Richter8f0525f2006-03-28 20:03:45 -05001965 SCpnt->result = CHECK_CONDITION << 1 | DID_OK << 16;
Stefan Richtera237f352005-11-07 06:31:39 -05001966 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001967
Stefan Richtera237f352005-11-07 06:31:39 -05001968 case SBP2_SCSI_STATUS_SELECTION_TIMEOUT:
1969 SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT");
1970 SCpnt->result = DID_NO_CONNECT << 16;
1971 scsi_print_command(SCpnt);
1972 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001973
Stefan Richtera237f352005-11-07 06:31:39 -05001974 case SBP2_SCSI_STATUS_CONDITION_MET:
1975 case SBP2_SCSI_STATUS_RESERVATION_CONFLICT:
1976 case SBP2_SCSI_STATUS_COMMAND_TERMINATED:
1977 SBP2_ERR("Bad SCSI status = %x", scsi_status);
1978 SCpnt->result = DID_ERROR << 16;
1979 scsi_print_command(SCpnt);
1980 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001981
Stefan Richtera237f352005-11-07 06:31:39 -05001982 default:
1983 SBP2_ERR("Unsupported SCSI status = %x", scsi_status);
1984 SCpnt->result = DID_ERROR << 16;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001985 }
1986
Stefan Richtere8ca5662006-11-02 21:16:08 +01001987 /* If a bus reset is in progress and there was an error, complete
1988 * the command as busy so that it will get retried. */
Stefan Richter138c8af2006-11-02 21:16:08 +01001989 if (!hpsb_node_entry_valid(lu->ne)
Stefan Richtera237f352005-11-07 06:31:39 -05001990 && (scsi_status != SBP2_SCSI_STATUS_GOOD)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001991 SBP2_ERR("Completing command with busy (bus reset)");
1992 SCpnt->result = DID_BUS_BUSY << 16;
1993 }
1994
Stefan Richtere8ca5662006-11-02 21:16:08 +01001995 /* Tell the SCSI stack that we're done with this command. */
Stefan Richtera237f352005-11-07 06:31:39 -05001996 done(SCpnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001997}
1998
Jody McIntyreabd559b2005-09-30 11:59:06 -07001999static int sbp2scsi_slave_alloc(struct scsi_device *sdev)
2000{
Stefan Richter138c8af2006-11-02 21:16:08 +01002001 struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0];
Stefan Richtera80614d2006-02-14 22:04:19 -05002002
Stefan Richteref774c12008-02-17 14:57:10 +01002003 if (sdev->lun != 0 || sdev->id != lu->ud->id || sdev->channel != 0)
2004 return -ENODEV;
2005
Stefan Richter138c8af2006-11-02 21:16:08 +01002006 lu->sdev = sdev;
Stefan Richterc394f1e2006-08-07 20:48:00 +02002007 sdev->allow_restart = 1;
Stefan Richtera80614d2006-02-14 22:04:19 -05002008
Stefan Richtera4b47d62008-01-27 22:32:22 +01002009 /* SBP-2 requires quadlet alignment of the data buffers. */
2010 blk_queue_update_dma_alignment(sdev->request_queue, 4 - 1);
James Bottomley465ff312008-01-01 10:00:10 -06002011
Stefan Richter138c8af2006-11-02 21:16:08 +01002012 if (lu->workarounds & SBP2_WORKAROUND_INQUIRY_36)
Stefan Richtera80614d2006-02-14 22:04:19 -05002013 sdev->inquiry_len = 36;
Jody McIntyreabd559b2005-09-30 11:59:06 -07002014 return 0;
2015}
2016
Jody McIntyreabd559b2005-09-30 11:59:06 -07002017static int sbp2scsi_slave_configure(struct scsi_device *sdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002018{
Stefan Richter138c8af2006-11-02 21:16:08 +01002019 struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0];
Stefan Richter24d3bf82006-05-15 22:04:59 +02002020
Ben Collins365c7862005-11-07 06:31:24 -05002021 sdev->use_10_for_rw = 1;
Stefan Richter24d3bf82006-05-15 22:04:59 +02002022
Stefan Richter82f06e82008-05-11 00:37:14 +02002023 if (sbp2_exclusive_login)
2024 sdev->manage_start_stop = 1;
Stefan Richter1a74bc62007-01-10 20:17:15 +01002025 if (sdev->type == TYPE_ROM)
2026 sdev->use_10_for_ms = 1;
Stefan Richter24d3bf82006-05-15 22:04:59 +02002027 if (sdev->type == TYPE_DISK &&
Stefan Richter138c8af2006-11-02 21:16:08 +01002028 lu->workarounds & SBP2_WORKAROUND_MODE_SENSE_8)
Stefan Richter24d3bf82006-05-15 22:04:59 +02002029 sdev->skip_ms_page_8 = 1;
Stefan Richter138c8af2006-11-02 21:16:08 +01002030 if (lu->workarounds & SBP2_WORKAROUND_FIX_CAPACITY)
Stefan Richtere9a1c522006-05-15 22:06:37 +02002031 sdev->fix_capacity = 1;
Stefan Richter37191222008-05-11 00:35:55 +02002032 if (lu->workarounds & SBP2_WORKAROUND_POWER_CONDITION)
2033 sdev->start_stop_pwr_cond = 1;
Stefan Richter4e6343a2007-12-16 17:31:26 +01002034 if (lu->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS)
2035 blk_queue_max_sectors(sdev->request_queue, 128 * 1024 / 512);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002036 return 0;
2037}
2038
Jody McIntyreabd559b2005-09-30 11:59:06 -07002039static void sbp2scsi_slave_destroy(struct scsi_device *sdev)
2040{
Stefan Richter138c8af2006-11-02 21:16:08 +01002041 ((struct sbp2_lu *)sdev->host->hostdata[0])->sdev = NULL;
Jody McIntyreabd559b2005-09-30 11:59:06 -07002042 return;
2043}
2044
Linus Torvalds1da177e2005-04-16 15:20:36 -07002045/*
Stefan Richtere8ca5662006-11-02 21:16:08 +01002046 * Called by scsi stack when something has really gone wrong.
2047 * Usually called when a command has timed-out for some reason.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002048 */
2049static int sbp2scsi_abort(struct scsi_cmnd *SCpnt)
2050{
Stefan Richter138c8af2006-11-02 21:16:08 +01002051 struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0];
2052 struct sbp2_fwhost_info *hi = lu->hi;
2053 struct sbp2_command_info *cmd;
Stefan Richter24c7cd02006-04-01 21:11:41 +02002054 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002055
Stefan Richter35644092006-11-02 21:16:08 +01002056 SBP2_INFO("aborting sbp2 command");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002057 scsi_print_command(SCpnt);
2058
Stefan Richter138c8af2006-11-02 21:16:08 +01002059 if (sbp2util_node_is_available(lu)) {
2060 sbp2_agent_reset(lu, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002061
Stefan Richter23077f12006-09-11 20:17:14 +02002062 /* Return a matching command structure to the free pool. */
Stefan Richter138c8af2006-11-02 21:16:08 +01002063 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
2064 cmd = sbp2util_find_command_for_SCpnt(lu, SCpnt);
2065 if (cmd) {
Stefan Richter97d552e2006-12-29 23:47:04 +01002066 dma_sync_single_for_cpu(hi->host->device.parent,
Stefan Richter138c8af2006-11-02 21:16:08 +01002067 cmd->command_orb_dma,
2068 sizeof(struct sbp2_command_orb),
Stefan Richter9b7d9c02006-11-22 21:44:34 +01002069 DMA_TO_DEVICE);
Stefan Richter97d552e2006-12-29 23:47:04 +01002070 dma_sync_single_for_cpu(hi->host->device.parent,
2071 cmd->sge_dma,
Stefan Richter138c8af2006-11-02 21:16:08 +01002072 sizeof(cmd->scatter_gather_element),
Stefan Richter2446a792007-02-04 20:54:57 +01002073 DMA_TO_DEVICE);
Stefan Richter138c8af2006-11-02 21:16:08 +01002074 sbp2util_mark_command_completed(lu, cmd);
2075 if (cmd->Current_SCpnt) {
2076 cmd->Current_SCpnt->result = DID_ABORT << 16;
2077 cmd->Current_done(cmd->Current_SCpnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002078 }
2079 }
Stefan Richter138c8af2006-11-02 21:16:08 +01002080 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002081
Stefan Richter138c8af2006-11-02 21:16:08 +01002082 sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002083 }
2084
Stefan Richtera237f352005-11-07 06:31:39 -05002085 return SUCCESS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002086}
2087
2088/*
2089 * Called by scsi stack when something has really gone wrong.
2090 */
Jody McIntyreabd559b2005-09-30 11:59:06 -07002091static int sbp2scsi_reset(struct scsi_cmnd *SCpnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002092{
Stefan Richter138c8af2006-11-02 21:16:08 +01002093 struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002094
Stefan Richter35644092006-11-02 21:16:08 +01002095 SBP2_INFO("reset requested");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002096
Stefan Richter138c8af2006-11-02 21:16:08 +01002097 if (sbp2util_node_is_available(lu)) {
Stefan Richter35644092006-11-02 21:16:08 +01002098 SBP2_INFO("generating sbp2 fetch agent reset");
Stefan Richter138c8af2006-11-02 21:16:08 +01002099 sbp2_agent_reset(lu, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002100 }
2101
Jody McIntyreabd559b2005-09-30 11:59:06 -07002102 return SUCCESS;
Jeff Garzik 94d0e7b82005-05-28 07:55:48 -04002103}
2104
Stefan Richtera237f352005-11-07 06:31:39 -05002105static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev,
2106 struct device_attribute *attr,
2107 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002108{
2109 struct scsi_device *sdev;
Stefan Richter138c8af2006-11-02 21:16:08 +01002110 struct sbp2_lu *lu;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002111
2112 if (!(sdev = to_scsi_device(dev)))
2113 return 0;
2114
Stefan Richter138c8af2006-11-02 21:16:08 +01002115 if (!(lu = (struct sbp2_lu *)sdev->host->hostdata[0]))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002116 return 0;
2117
Stefan Richterd7794c82007-05-27 13:17:15 +02002118 if (sbp2_long_sysfs_ieee1394_id)
2119 return sprintf(buf, "%016Lx:%06x:%04x\n",
2120 (unsigned long long)lu->ne->guid,
2121 lu->ud->directory_id, ORB_SET_LUN(lu->lun));
2122 else
2123 return sprintf(buf, "%016Lx:%d:%d\n",
2124 (unsigned long long)lu->ne->guid,
2125 lu->ud->id, ORB_SET_LUN(lu->lun));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002126}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002127
2128MODULE_AUTHOR("Ben Collins <bcollins@debian.org>");
2129MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver");
2130MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME);
2131MODULE_LICENSE("GPL");
2132
Linus Torvalds1da177e2005-04-16 15:20:36 -07002133static int sbp2_module_init(void)
2134{
2135 int ret;
2136
Stefan Richterca0c7452006-11-02 21:16:08 +01002137 if (sbp2_serialize_io) {
2138 sbp2_shost_template.can_queue = 1;
2139 sbp2_shost_template.cmd_per_lun = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002140 }
2141
Stefan Richterca0c7452006-11-02 21:16:08 +01002142 sbp2_shost_template.max_sectors = sbp2_max_sectors;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002143
Linus Torvalds1da177e2005-04-16 15:20:36 -07002144 hpsb_register_highlevel(&sbp2_highlevel);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002145 ret = hpsb_register_protocol(&sbp2_driver);
2146 if (ret) {
2147 SBP2_ERR("Failed to register protocol");
2148 hpsb_unregister_highlevel(&sbp2_highlevel);
2149 return ret;
2150 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002151 return 0;
2152}
2153
2154static void __exit sbp2_module_exit(void)
2155{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002156 hpsb_unregister_protocol(&sbp2_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002157 hpsb_unregister_highlevel(&sbp2_highlevel);
2158}
2159
2160module_init(sbp2_module_init);
2161module_exit(sbp2_module_exit);