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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 Richter679c0cd2006-05-15 22:08:09 +0200189 * - override internal blacklist
190 * Instead of adding to the built-in blacklist, use only the workarounds
191 * specified in the module load parameter.
192 * Useful if a blacklist entry interfered with a non-broken device.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 */
Stefan Richter24d3bf82006-05-15 22:04:59 +0200194static int sbp2_default_workarounds;
195module_param_named(workarounds, sbp2_default_workarounds, int, 0644);
196MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0"
197 ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS)
198 ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36)
199 ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8)
Stefan Richtere9a1c522006-05-15 22:06:37 +0200200 ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY)
Stefan Richterd94a9832008-02-03 23:07:44 +0100201 ", delay inquiry = " __stringify(SBP2_WORKAROUND_DELAY_INQUIRY)
Stefan Richter679c0cd2006-05-15 22:08:09 +0200202 ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE)
Stefan Richter24d3bf82006-05-15 22:04:59 +0200203 ", or a combination)");
204
Stefan Richterd7794c82007-05-27 13:17:15 +0200205/*
206 * This influences the format of the sysfs attribute
207 * /sys/bus/scsi/devices/.../ieee1394_id.
208 *
209 * The default format is like in older kernels: %016Lx:%d:%d
210 * It contains the target's EUI-64, a number given to the logical unit by
211 * the ieee1394 driver's nodemgr (starting at 0), and the LUN.
212 *
213 * The long format is: %016Lx:%06x:%04x
214 * It contains the target's EUI-64, the unit directory's directory_ID as per
215 * IEEE 1212 clause 7.7.19, and the LUN. This format comes closest to the
216 * format of SBP(-3) target port and logical unit identifier as per SAM (SCSI
217 * Architecture Model) rev.2 to 4 annex A. Therefore and because it is
218 * independent of the implementation of the ieee1394 nodemgr, the longer format
219 * is recommended for future use.
220 */
221static int sbp2_long_sysfs_ieee1394_id;
222module_param_named(long_ieee1394_id, sbp2_long_sysfs_ieee1394_id, bool, 0644);
223MODULE_PARM_DESC(long_ieee1394_id, "8+3+2 bytes format of ieee1394_id in sysfs "
224 "(default = backwards-compatible = N, SAM-conforming = Y)");
225
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226
Stefan Richteredf1fb22006-11-02 21:16:08 +0100227#define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
228#define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230/*
231 * Globals
232 */
Stefan Richter138c8af2006-11-02 21:16:08 +0100233static void sbp2scsi_complete_all_commands(struct sbp2_lu *, u32);
234static void sbp2scsi_complete_command(struct sbp2_lu *, u32, struct scsi_cmnd *,
Stefan Richterea42ea02006-11-02 21:16:08 +0100235 void (*)(struct scsi_cmnd *));
Stefan Richter138c8af2006-11-02 21:16:08 +0100236static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *);
237static int sbp2_start_device(struct sbp2_lu *);
238static void sbp2_remove_device(struct sbp2_lu *);
239static int sbp2_login_device(struct sbp2_lu *);
240static int sbp2_reconnect_device(struct sbp2_lu *);
241static int sbp2_logout_device(struct sbp2_lu *);
Stefan Richterea42ea02006-11-02 21:16:08 +0100242static void sbp2_host_reset(struct hpsb_host *);
243static int sbp2_handle_status_write(struct hpsb_host *, int, int, quadlet_t *,
244 u64, size_t, u16);
Stefan Richter138c8af2006-11-02 21:16:08 +0100245static int sbp2_agent_reset(struct sbp2_lu *, int);
246static void sbp2_parse_unit_directory(struct sbp2_lu *,
Stefan Richterea42ea02006-11-02 21:16:08 +0100247 struct unit_directory *);
Stefan Richter138c8af2006-11-02 21:16:08 +0100248static int sbp2_set_busy_timeout(struct sbp2_lu *);
249static int sbp2_max_speed_and_size(struct sbp2_lu *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251
252static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC };
253
Stefan Richter261b5f62007-08-11 11:52:08 +0200254static DEFINE_RWLOCK(sbp2_hi_logical_units_lock);
255
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256static struct hpsb_highlevel sbp2_highlevel = {
Stefan Richterea42ea02006-11-02 21:16:08 +0100257 .name = SBP2_DEVICE_NAME,
258 .host_reset = sbp2_host_reset,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259};
260
261static struct hpsb_address_ops sbp2_ops = {
Stefan Richterea42ea02006-11-02 21:16:08 +0100262 .write = sbp2_handle_status_write
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263};
264
265#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
Stefan Richterea42ea02006-11-02 21:16:08 +0100266static int sbp2_handle_physdma_write(struct hpsb_host *, int, int, quadlet_t *,
267 u64, size_t, u16);
268static int sbp2_handle_physdma_read(struct hpsb_host *, int, quadlet_t *, u64,
269 size_t, u16);
270
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271static struct hpsb_address_ops sbp2_physdma_ops = {
Stefan Richterea42ea02006-11-02 21:16:08 +0100272 .read = sbp2_handle_physdma_read,
273 .write = sbp2_handle_physdma_write,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274};
275#endif
276
Stefan Richterea42ea02006-11-02 21:16:08 +0100277
278/*
279 * Interface to driver core and IEEE 1394 core
280 */
281static struct ieee1394_device_id sbp2_id_table[] = {
282 {
283 .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
284 .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff,
285 .version = SBP2_SW_VERSION_ENTRY & 0xffffff},
286 {}
287};
288MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table);
289
290static int sbp2_probe(struct device *);
291static int sbp2_remove(struct device *);
292static int sbp2_update(struct unit_directory *);
293
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294static struct hpsb_protocol_driver sbp2_driver = {
Ben Collinsed30c262006-11-23 13:59:48 -0500295 .name = SBP2_DEVICE_NAME,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296 .id_table = sbp2_id_table,
297 .update = sbp2_update,
298 .driver = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 .probe = sbp2_probe,
300 .remove = sbp2_remove,
301 },
302};
303
Stefan Richterea42ea02006-11-02 21:16:08 +0100304
305/*
306 * Interface to SCSI core
307 */
308static int sbp2scsi_queuecommand(struct scsi_cmnd *,
309 void (*)(struct scsi_cmnd *));
310static int sbp2scsi_abort(struct scsi_cmnd *);
311static int sbp2scsi_reset(struct scsi_cmnd *);
312static int sbp2scsi_slave_alloc(struct scsi_device *);
313static int sbp2scsi_slave_configure(struct scsi_device *);
314static void sbp2scsi_slave_destroy(struct scsi_device *);
315static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *,
316 struct device_attribute *, char *);
317
318static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL);
319
320static struct device_attribute *sbp2_sysfs_sdev_attrs[] = {
321 &dev_attr_ieee1394_id,
322 NULL
323};
324
Stefan Richterca0c7452006-11-02 21:16:08 +0100325static struct scsi_host_template sbp2_shost_template = {
Stefan Richterea42ea02006-11-02 21:16:08 +0100326 .module = THIS_MODULE,
327 .name = "SBP-2 IEEE-1394",
328 .proc_name = SBP2_DEVICE_NAME,
329 .queuecommand = sbp2scsi_queuecommand,
330 .eh_abort_handler = sbp2scsi_abort,
331 .eh_device_reset_handler = sbp2scsi_reset,
332 .slave_alloc = sbp2scsi_slave_alloc,
333 .slave_configure = sbp2scsi_slave_configure,
334 .slave_destroy = sbp2scsi_slave_destroy,
335 .this_id = -1,
336 .sg_tablesize = SG_ALL,
337 .use_clustering = ENABLE_CLUSTERING,
338 .cmd_per_lun = SBP2_MAX_CMDS,
339 .can_queue = SBP2_MAX_CMDS,
Stefan Richterea42ea02006-11-02 21:16:08 +0100340 .sdev_attrs = sbp2_sysfs_sdev_attrs,
341};
342
Stefan Richter4618fd32006-12-30 15:37:09 +0100343/* for match-all entries in sbp2_workarounds_table */
344#define SBP2_ROM_VALUE_WILDCARD 0x1000000
Stefan Richterea42ea02006-11-02 21:16:08 +0100345
Stefan Richtera80614d2006-02-14 22:04:19 -0500346/*
Stefan Richter24d3bf82006-05-15 22:04:59 +0200347 * List of devices with known bugs.
348 *
349 * The firmware_revision field, masked with 0xffff00, is the best indicator
350 * for the type of bridge chip of a device. It yields a few false positives
351 * but this did not break correctly behaving devices so far.
Stefan Richtera80614d2006-02-14 22:04:19 -0500352 */
Stefan Richter24d3bf82006-05-15 22:04:59 +0200353static const struct {
354 u32 firmware_revision;
Stefan Richtere9a1c522006-05-15 22:06:37 +0200355 u32 model_id;
Stefan Richter24d3bf82006-05-15 22:04:59 +0200356 unsigned workarounds;
357} sbp2_workarounds_table[] = {
Ben Collins4b9a3342006-06-12 18:10:18 -0400358 /* DViCO Momobay CX-1 with TSB42AA9 bridge */ {
Stefan Richter24d3bf82006-05-15 22:04:59 +0200359 .firmware_revision = 0x002800,
Ben Collins4b9a3342006-06-12 18:10:18 -0400360 .model_id = 0x001010,
Stefan Richter24d3bf82006-05-15 22:04:59 +0200361 .workarounds = SBP2_WORKAROUND_INQUIRY_36 |
362 SBP2_WORKAROUND_MODE_SENSE_8,
363 },
Stefan Richterd94a9832008-02-03 23:07:44 +0100364 /* DViCO Momobay FX-3A with TSB42AA9A bridge */ {
365 .firmware_revision = 0x002800,
366 .model_id = 0x000000,
367 .workarounds = SBP2_WORKAROUND_DELAY_INQUIRY,
368 },
Stefan Richter24d3bf82006-05-15 22:04:59 +0200369 /* Initio bridges, actually only needed for some older ones */ {
370 .firmware_revision = 0x000200,
Stefan Richter4618fd32006-12-30 15:37:09 +0100371 .model_id = SBP2_ROM_VALUE_WILDCARD,
Stefan Richter24d3bf82006-05-15 22:04:59 +0200372 .workarounds = SBP2_WORKAROUND_INQUIRY_36,
373 },
374 /* Symbios bridge */ {
375 .firmware_revision = 0xa0b800,
Stefan Richter4618fd32006-12-30 15:37:09 +0100376 .model_id = SBP2_ROM_VALUE_WILDCARD,
Stefan Richter24d3bf82006-05-15 22:04:59 +0200377 .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS,
Stefan Richtere9a1c522006-05-15 22:06:37 +0200378 },
Stefan Richter6e45ef42008-03-11 22:32:52 +0100379 /* Datafab MD2-FW2 with Symbios/LSILogic SYM13FW500 bridge */ {
380 .firmware_revision = 0x002600,
381 .model_id = SBP2_ROM_VALUE_WILDCARD,
382 .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS,
383 },
Stefan Richtere9a1c522006-05-15 22:06:37 +0200384 /* iPod 4th generation */ {
385 .firmware_revision = 0x0a2700,
386 .model_id = 0x000021,
387 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
388 },
389 /* iPod mini */ {
390 .firmware_revision = 0x0a2700,
391 .model_id = 0x000023,
392 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
393 },
394 /* iPod Photo */ {
395 .firmware_revision = 0x0a2700,
396 .model_id = 0x00007e,
397 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
Stefan Richter24d3bf82006-05-15 22:04:59 +0200398 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399};
400
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401/**************************************
402 * General utility functions
403 **************************************/
404
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405#ifndef __BIG_ENDIAN
406/*
407 * Converts a buffer from be32 to cpu byte ordering. Length is in bytes.
408 */
Stefan Richter2b01b802006-07-03 12:02:28 -0400409static inline void sbp2util_be32_to_cpu_buffer(void *buffer, int length)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410{
411 u32 *temp = buffer;
412
413 for (length = (length >> 2); length--; )
414 temp[length] = be32_to_cpu(temp[length]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415}
416
417/*
418 * Converts a buffer from cpu to be32 byte ordering. Length is in bytes.
419 */
Stefan Richter2b01b802006-07-03 12:02:28 -0400420static inline void sbp2util_cpu_to_be32_buffer(void *buffer, int length)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421{
422 u32 *temp = buffer;
423
424 for (length = (length >> 2); length--; )
425 temp[length] = cpu_to_be32(temp[length]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426}
427#else /* BIG_ENDIAN */
428/* Why waste the cpu cycles? */
Stefan Richter611aa192006-08-02 18:44:00 +0200429#define sbp2util_be32_to_cpu_buffer(x,y) do {} while (0)
430#define sbp2util_cpu_to_be32_buffer(x,y) do {} while (0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431#endif
432
Stefan Richterca0c7452006-11-02 21:16:08 +0100433static DECLARE_WAIT_QUEUE_HEAD(sbp2_access_wq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434
Stefan Richtere8398bb2006-07-23 22:19:00 +0200435/*
436 * Waits for completion of an SBP-2 access request.
437 * Returns nonzero if timed out or prematurely interrupted.
438 */
Stefan Richter138c8af2006-11-02 21:16:08 +0100439static int sbp2util_access_timeout(struct sbp2_lu *lu, int timeout)
Stefan Richtere8398bb2006-07-23 22:19:00 +0200440{
Stefan Richterca0c7452006-11-02 21:16:08 +0100441 long leftover;
Stefan Richtere8398bb2006-07-23 22:19:00 +0200442
Stefan Richterca0c7452006-11-02 21:16:08 +0100443 leftover = wait_event_interruptible_timeout(
Stefan Richter138c8af2006-11-02 21:16:08 +0100444 sbp2_access_wq, lu->access_complete, timeout);
445 lu->access_complete = 0;
Stefan Richtere8398bb2006-07-23 22:19:00 +0200446 return leftover <= 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447}
448
Stefan Richter138c8af2006-11-02 21:16:08 +0100449static void sbp2_free_packet(void *packet)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450{
451 hpsb_free_tlabel(packet);
452 hpsb_free_packet(packet);
453}
454
Stefan Richtere8ca5662006-11-02 21:16:08 +0100455/*
456 * This is much like hpsb_node_write(), except it ignores the response
457 * subaction and returns immediately. Can be used from atomic context.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 */
459static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr,
Stefan Richter138c8af2006-11-02 21:16:08 +0100460 quadlet_t *buf, size_t len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461{
462 struct hpsb_packet *packet;
463
Stefan Richter138c8af2006-11-02 21:16:08 +0100464 packet = hpsb_make_writepacket(ne->host, ne->nodeid, addr, buf, len);
Stefan Richtera237f352005-11-07 06:31:39 -0500465 if (!packet)
466 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467
Stefan Richter138c8af2006-11-02 21:16:08 +0100468 hpsb_set_packet_complete_task(packet, sbp2_free_packet, packet);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 hpsb_node_fill_packet(ne, packet);
Stefan Richtera237f352005-11-07 06:31:39 -0500470 if (hpsb_send_packet(packet) < 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 sbp2_free_packet(packet);
472 return -EIO;
473 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 return 0;
475}
476
Stefan Richter138c8af2006-11-02 21:16:08 +0100477static void sbp2util_notify_fetch_agent(struct sbp2_lu *lu, u64 offset,
478 quadlet_t *data, size_t len)
Stefan Richter09ee67a2006-08-14 18:43:00 +0200479{
Stefan Richter138c8af2006-11-02 21:16:08 +0100480 /* There is a small window after a bus reset within which the node
481 * entry's generation is current but the reconnect wasn't completed. */
482 if (unlikely(atomic_read(&lu->state) == SBP2LU_STATE_IN_RESET))
Stefan Richter09ee67a2006-08-14 18:43:00 +0200483 return;
484
Stefan Richter138c8af2006-11-02 21:16:08 +0100485 if (hpsb_node_write(lu->ne, lu->command_block_agent_addr + offset,
Stefan Richter09ee67a2006-08-14 18:43:00 +0200486 data, len))
487 SBP2_ERR("sbp2util_notify_fetch_agent failed.");
Stefan Richter138c8af2006-11-02 21:16:08 +0100488
489 /* Now accept new SCSI commands, unless a bus reset happended during
490 * hpsb_node_write. */
491 if (likely(atomic_read(&lu->state) != SBP2LU_STATE_IN_RESET))
492 scsi_unblock_requests(lu->shost);
Stefan Richter09ee67a2006-08-14 18:43:00 +0200493}
494
David Howellsc4028952006-11-22 14:57:56 +0000495static void sbp2util_write_orb_pointer(struct work_struct *work)
Stefan Richter09ee67a2006-08-14 18:43:00 +0200496{
Stefan Richterec9b7e12006-12-07 23:23:25 +0100497 struct sbp2_lu *lu = container_of(work, struct sbp2_lu, protocol_work);
Stefan Richter09ee67a2006-08-14 18:43:00 +0200498 quadlet_t data[2];
499
Stefan Richterec9b7e12006-12-07 23:23:25 +0100500 data[0] = ORB_SET_NODE_ID(lu->hi->host->node_id);
501 data[1] = lu->last_orb_dma;
Stefan Richter09ee67a2006-08-14 18:43:00 +0200502 sbp2util_cpu_to_be32_buffer(data, 8);
Stefan Richterec9b7e12006-12-07 23:23:25 +0100503 sbp2util_notify_fetch_agent(lu, SBP2_ORB_POINTER_OFFSET, data, 8);
Stefan Richter09ee67a2006-08-14 18:43:00 +0200504}
505
David Howellsc4028952006-11-22 14:57:56 +0000506static void sbp2util_write_doorbell(struct work_struct *work)
Stefan Richter09ee67a2006-08-14 18:43:00 +0200507{
Stefan Richterec9b7e12006-12-07 23:23:25 +0100508 struct sbp2_lu *lu = container_of(work, struct sbp2_lu, protocol_work);
509
510 sbp2util_notify_fetch_agent(lu, SBP2_DOORBELL_OFFSET, NULL, 4);
Stefan Richter09ee67a2006-08-14 18:43:00 +0200511}
512
Stefan Richter138c8af2006-11-02 21:16:08 +0100513static int sbp2util_create_command_orb_pool(struct sbp2_lu *lu)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514{
Stefan Richter138c8af2006-11-02 21:16:08 +0100515 struct sbp2_fwhost_info *hi = lu->hi;
Stefan Richter138c8af2006-11-02 21:16:08 +0100516 struct sbp2_command_info *cmd;
Stefan Richter3d269cb2007-02-04 20:57:38 +0100517 int i, orbs = sbp2_serialize_io ? 2 : SBP2_MAX_CMDS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519 for (i = 0; i < orbs; i++) {
Stefan Richter3d269cb2007-02-04 20:57:38 +0100520 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
521 if (!cmd)
Stefan Richtera237f352005-11-07 06:31:39 -0500522 return -ENOMEM;
Stefan Richter97d552e2006-12-29 23:47:04 +0100523 cmd->command_orb_dma = dma_map_single(hi->host->device.parent,
Stefan Richter138c8af2006-11-02 21:16:08 +0100524 &cmd->command_orb,
525 sizeof(struct sbp2_command_orb),
Stefan Richter9b7d9c02006-11-22 21:44:34 +0100526 DMA_TO_DEVICE);
Stefan Richter97d552e2006-12-29 23:47:04 +0100527 cmd->sge_dma = dma_map_single(hi->host->device.parent,
Stefan Richter138c8af2006-11-02 21:16:08 +0100528 &cmd->scatter_gather_element,
529 sizeof(cmd->scatter_gather_element),
Stefan Richter2446a792007-02-04 20:54:57 +0100530 DMA_TO_DEVICE);
Stefan Richter138c8af2006-11-02 21:16:08 +0100531 INIT_LIST_HEAD(&cmd->list);
532 list_add_tail(&cmd->list, &lu->cmd_orb_completed);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534 return 0;
535}
536
Stefan Richtera2ee3f92007-08-11 11:51:16 +0200537static void sbp2util_remove_command_orb_pool(struct sbp2_lu *lu,
538 struct hpsb_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540 struct list_head *lh, *next;
Stefan Richter138c8af2006-11-02 21:16:08 +0100541 struct sbp2_command_info *cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 unsigned long flags;
543
Stefan Richter138c8af2006-11-02 21:16:08 +0100544 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
545 if (!list_empty(&lu->cmd_orb_completed))
546 list_for_each_safe(lh, next, &lu->cmd_orb_completed) {
547 cmd = list_entry(lh, struct sbp2_command_info, list);
Stefan Richter97d552e2006-12-29 23:47:04 +0100548 dma_unmap_single(host->device.parent,
549 cmd->command_orb_dma,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 sizeof(struct sbp2_command_orb),
Stefan Richter9b7d9c02006-11-22 21:44:34 +0100551 DMA_TO_DEVICE);
Stefan Richter97d552e2006-12-29 23:47:04 +0100552 dma_unmap_single(host->device.parent, cmd->sge_dma,
Stefan Richter138c8af2006-11-02 21:16:08 +0100553 sizeof(cmd->scatter_gather_element),
Stefan Richter2446a792007-02-04 20:54:57 +0100554 DMA_TO_DEVICE);
Stefan Richter138c8af2006-11-02 21:16:08 +0100555 kfree(cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 }
Stefan Richter138c8af2006-11-02 21:16:08 +0100557 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558 return;
559}
560
561/*
Stefan Richtere8ca5662006-11-02 21:16:08 +0100562 * Finds the sbp2_command for a given outstanding command ORB.
563 * Only looks at the in-use list.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564 */
565static struct sbp2_command_info *sbp2util_find_command_for_orb(
Stefan Richter138c8af2006-11-02 21:16:08 +0100566 struct sbp2_lu *lu, dma_addr_t orb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567{
Stefan Richter138c8af2006-11-02 21:16:08 +0100568 struct sbp2_command_info *cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 unsigned long flags;
570
Stefan Richter138c8af2006-11-02 21:16:08 +0100571 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
572 if (!list_empty(&lu->cmd_orb_inuse))
573 list_for_each_entry(cmd, &lu->cmd_orb_inuse, list)
574 if (cmd->command_orb_dma == orb) {
575 spin_unlock_irqrestore(
576 &lu->cmd_orb_lock, flags);
577 return cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578 }
Stefan Richter138c8af2006-11-02 21:16:08 +0100579 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
Stefan Richtera237f352005-11-07 06:31:39 -0500580 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581}
582
583/*
Stefan Richtere8ca5662006-11-02 21:16:08 +0100584 * Finds the sbp2_command for a given outstanding SCpnt.
585 * Only looks at the in-use list.
Stefan Richter138c8af2006-11-02 21:16:08 +0100586 * Must be called with lu->cmd_orb_lock held.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587 */
Stefan Richter24c7cd02006-04-01 21:11:41 +0200588static struct sbp2_command_info *sbp2util_find_command_for_SCpnt(
Stefan Richter138c8af2006-11-02 21:16:08 +0100589 struct sbp2_lu *lu, void *SCpnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590{
Stefan Richter138c8af2006-11-02 21:16:08 +0100591 struct sbp2_command_info *cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592
Stefan Richter138c8af2006-11-02 21:16:08 +0100593 if (!list_empty(&lu->cmd_orb_inuse))
594 list_for_each_entry(cmd, &lu->cmd_orb_inuse, list)
595 if (cmd->Current_SCpnt == SCpnt)
596 return cmd;
Stefan Richtera237f352005-11-07 06:31:39 -0500597 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598}
599
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600static struct sbp2_command_info *sbp2util_allocate_command_orb(
Stefan Richter138c8af2006-11-02 21:16:08 +0100601 struct sbp2_lu *lu,
602 struct scsi_cmnd *Current_SCpnt,
603 void (*Current_done)(struct scsi_cmnd *))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604{
605 struct list_head *lh;
Stefan Richter138c8af2006-11-02 21:16:08 +0100606 struct sbp2_command_info *cmd = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607 unsigned long flags;
608
Stefan Richter138c8af2006-11-02 21:16:08 +0100609 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
610 if (!list_empty(&lu->cmd_orb_completed)) {
611 lh = lu->cmd_orb_completed.next;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612 list_del(lh);
Stefan Richter138c8af2006-11-02 21:16:08 +0100613 cmd = list_entry(lh, struct sbp2_command_info, list);
614 cmd->Current_done = Current_done;
615 cmd->Current_SCpnt = Current_SCpnt;
616 list_add_tail(&cmd->list, &lu->cmd_orb_inuse);
617 } else
Harvey Harrisonb1ce1fd2008-03-05 18:24:54 -0800618 SBP2_ERR("%s: no orbs available", __func__);
Stefan Richter138c8af2006-11-02 21:16:08 +0100619 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
620 return cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621}
622
Stefan Richter58272c12006-11-04 09:55:33 +0100623/*
624 * Unmaps the DMAs of a command and moves the command to the completed ORB list.
625 * Must be called with lu->cmd_orb_lock held.
626 */
627static void sbp2util_mark_command_completed(struct sbp2_lu *lu,
628 struct sbp2_command_info *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629{
Stefan Richter58272c12006-11-04 09:55:33 +0100630 struct hpsb_host *host = lu->ud->ne->host;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631
Stefan Richter138c8af2006-11-02 21:16:08 +0100632 if (cmd->cmd_dma) {
633 if (cmd->dma_type == CMD_DMA_SINGLE)
Stefan Richter97d552e2006-12-29 23:47:04 +0100634 dma_unmap_single(host->device.parent, cmd->cmd_dma,
Stefan Richter138c8af2006-11-02 21:16:08 +0100635 cmd->dma_size, cmd->dma_dir);
636 else if (cmd->dma_type == CMD_DMA_PAGE)
Stefan Richter97d552e2006-12-29 23:47:04 +0100637 dma_unmap_page(host->device.parent, cmd->cmd_dma,
Stefan Richter138c8af2006-11-02 21:16:08 +0100638 cmd->dma_size, cmd->dma_dir);
Stefan Richteredf1fb22006-11-02 21:16:08 +0100639 /* XXX: Check for CMD_DMA_NONE bug */
Stefan Richter138c8af2006-11-02 21:16:08 +0100640 cmd->dma_type = CMD_DMA_NONE;
641 cmd->cmd_dma = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642 }
Stefan Richter138c8af2006-11-02 21:16:08 +0100643 if (cmd->sge_buffer) {
Stefan Richter97d552e2006-12-29 23:47:04 +0100644 dma_unmap_sg(host->device.parent, cmd->sge_buffer,
Stefan Richter138c8af2006-11-02 21:16:08 +0100645 cmd->dma_size, cmd->dma_dir);
646 cmd->sge_buffer = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647 }
Stefan Richtercd641f62006-11-02 21:16:08 +0100648 list_move_tail(&cmd->list, &lu->cmd_orb_completed);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649}
650
Jody McIntyreabd559b2005-09-30 11:59:06 -0700651/*
Stefan Richter138c8af2006-11-02 21:16:08 +0100652 * Is lu valid? Is the 1394 node still present?
Jody McIntyreabd559b2005-09-30 11:59:06 -0700653 */
Stefan Richter138c8af2006-11-02 21:16:08 +0100654static inline int sbp2util_node_is_available(struct sbp2_lu *lu)
Jody McIntyreabd559b2005-09-30 11:59:06 -0700655{
Stefan Richter138c8af2006-11-02 21:16:08 +0100656 return lu && lu->ne && !lu->ne->in_limbo;
Jody McIntyreabd559b2005-09-30 11:59:06 -0700657}
658
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659/*********************************************
660 * IEEE-1394 core driver stack related section
661 *********************************************/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662
663static int sbp2_probe(struct device *dev)
664{
665 struct unit_directory *ud;
Stefan Richter138c8af2006-11-02 21:16:08 +0100666 struct sbp2_lu *lu;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 ud = container_of(dev, struct unit_directory, device);
669
670 /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s)
671 * instead. */
672 if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY)
673 return -ENODEV;
674
Stefan Richter138c8af2006-11-02 21:16:08 +0100675 lu = sbp2_alloc_device(ud);
676 if (!lu)
Stefan Richtera237f352005-11-07 06:31:39 -0500677 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678
Stefan Richter138c8af2006-11-02 21:16:08 +0100679 sbp2_parse_unit_directory(lu, ud);
680 return sbp2_start_device(lu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681}
682
683static int sbp2_remove(struct device *dev)
684{
685 struct unit_directory *ud;
Stefan Richter138c8af2006-11-02 21:16:08 +0100686 struct sbp2_lu *lu;
Jody McIntyreabd559b2005-09-30 11:59:06 -0700687 struct scsi_device *sdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689 ud = container_of(dev, struct unit_directory, device);
Stefan Richter138c8af2006-11-02 21:16:08 +0100690 lu = ud->device.driver_data;
691 if (!lu)
Jody McIntyreabd559b2005-09-30 11:59:06 -0700692 return 0;
693
Stefan Richter138c8af2006-11-02 21:16:08 +0100694 if (lu->shost) {
Stefan Richterbf637ec2006-01-31 00:13:06 -0500695 /* Get rid of enqueued commands if there is no chance to
696 * send them. */
Stefan Richter138c8af2006-11-02 21:16:08 +0100697 if (!sbp2util_node_is_available(lu))
698 sbp2scsi_complete_all_commands(lu, DID_NO_CONNECT);
Stefan Richtere8ca5662006-11-02 21:16:08 +0100699 /* scsi_remove_device() may trigger shutdown functions of SCSI
Stefan Richterbf637ec2006-01-31 00:13:06 -0500700 * highlevel drivers which would deadlock if blocked. */
Stefan Richter138c8af2006-11-02 21:16:08 +0100701 atomic_set(&lu->state, SBP2LU_STATE_IN_SHUTDOWN);
702 scsi_unblock_requests(lu->shost);
Stefan Richterbf637ec2006-01-31 00:13:06 -0500703 }
Stefan Richter138c8af2006-11-02 21:16:08 +0100704 sdev = lu->sdev;
Jody McIntyreabd559b2005-09-30 11:59:06 -0700705 if (sdev) {
Stefan Richter138c8af2006-11-02 21:16:08 +0100706 lu->sdev = NULL;
Jody McIntyreabd559b2005-09-30 11:59:06 -0700707 scsi_remove_device(sdev);
708 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709
Stefan Richter138c8af2006-11-02 21:16:08 +0100710 sbp2_logout_device(lu);
711 sbp2_remove_device(lu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712
713 return 0;
714}
715
716static int sbp2_update(struct unit_directory *ud)
717{
Stefan Richter138c8af2006-11-02 21:16:08 +0100718 struct sbp2_lu *lu = ud->device.driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719
Stefan Richter138c8af2006-11-02 21:16:08 +0100720 if (sbp2_reconnect_device(lu)) {
Stefan Richtere8ca5662006-11-02 21:16:08 +0100721 /* Reconnect has failed. Perhaps we didn't reconnect fast
722 * enough. Try a regular login, but first log out just in
723 * case of any weirdness. */
Stefan Richter138c8af2006-11-02 21:16:08 +0100724 sbp2_logout_device(lu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725
Stefan Richter138c8af2006-11-02 21:16:08 +0100726 if (sbp2_login_device(lu)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727 /* Login failed too, just fail, and the backend
728 * will call our sbp2_remove for us */
729 SBP2_ERR("Failed to reconnect to sbp2 device!");
730 return -EBUSY;
731 }
732 }
733
Stefan Richter138c8af2006-11-02 21:16:08 +0100734 sbp2_set_busy_timeout(lu);
735 sbp2_agent_reset(lu, 1);
736 sbp2_max_speed_and_size(lu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737
Stefan Richtere8ca5662006-11-02 21:16:08 +0100738 /* Complete any pending commands with busy (so they get retried)
739 * and remove them from our queue. */
Stefan Richter138c8af2006-11-02 21:16:08 +0100740 sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741
Stefan Richter4fc383c2006-08-14 18:46:00 +0200742 /* Accept new commands unless there was another bus reset in the
743 * meantime. */
Stefan Richter138c8af2006-11-02 21:16:08 +0100744 if (hpsb_node_entry_valid(lu->ne)) {
745 atomic_set(&lu->state, SBP2LU_STATE_RUNNING);
746 scsi_unblock_requests(lu->shost);
Stefan Richter4fc383c2006-08-14 18:46:00 +0200747 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748 return 0;
749}
750
Stefan Richter138c8af2006-11-02 21:16:08 +0100751static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *ud)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752{
Stefan Richterca0c7452006-11-02 21:16:08 +0100753 struct sbp2_fwhost_info *hi;
Stefan Richter138c8af2006-11-02 21:16:08 +0100754 struct Scsi_Host *shost = NULL;
755 struct sbp2_lu *lu = NULL;
Stefan Richter261b5f62007-08-11 11:52:08 +0200756 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757
Stefan Richter138c8af2006-11-02 21:16:08 +0100758 lu = kzalloc(sizeof(*lu), GFP_KERNEL);
759 if (!lu) {
760 SBP2_ERR("failed to create lu");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761 goto failed_alloc;
762 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763
Stefan Richter138c8af2006-11-02 21:16:08 +0100764 lu->ne = ud->ne;
765 lu->ud = ud;
766 lu->speed_code = IEEE1394_SPEED_100;
767 lu->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100];
768 lu->status_fifo_addr = CSR1212_INVALID_ADDR_SPACE;
769 INIT_LIST_HEAD(&lu->cmd_orb_inuse);
770 INIT_LIST_HEAD(&lu->cmd_orb_completed);
771 INIT_LIST_HEAD(&lu->lu_list);
772 spin_lock_init(&lu->cmd_orb_lock);
773 atomic_set(&lu->state, SBP2LU_STATE_RUNNING);
774 INIT_WORK(&lu->protocol_work, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775
Stefan Richter138c8af2006-11-02 21:16:08 +0100776 ud->device.driver_data = lu;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777
778 hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host);
779 if (!hi) {
Stefan Richter138c8af2006-11-02 21:16:08 +0100780 hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host,
781 sizeof(*hi));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782 if (!hi) {
783 SBP2_ERR("failed to allocate hostinfo");
784 goto failed_alloc;
785 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786 hi->host = ud->ne->host;
Stefan Richter138c8af2006-11-02 21:16:08 +0100787 INIT_LIST_HEAD(&hi->logical_units);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
790 /* Handle data movement if physical dma is not
Stefan Richter55664052006-03-28 19:59:42 -0500791 * enabled or not supported on host controller */
792 if (!hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host,
793 &sbp2_physdma_ops,
794 0x0ULL, 0xfffffffcULL)) {
795 SBP2_ERR("failed to register lower 4GB address range");
796 goto failed_alloc;
797 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798#endif
799 }
800
Stefan Richter147830f2006-03-28 19:54:52 -0500801 /* Prevent unloading of the 1394 host */
802 if (!try_module_get(hi->host->driver->owner)) {
803 SBP2_ERR("failed to get a reference on 1394 host driver");
804 goto failed_alloc;
805 }
806
Stefan Richter138c8af2006-11-02 21:16:08 +0100807 lu->hi = hi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808
Stefan Richter261b5f62007-08-11 11:52:08 +0200809 write_lock_irqsave(&sbp2_hi_logical_units_lock, flags);
Stefan Richter138c8af2006-11-02 21:16:08 +0100810 list_add_tail(&lu->lu_list, &hi->logical_units);
Stefan Richter261b5f62007-08-11 11:52:08 +0200811 write_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812
Stefan Richter35bdddb2006-01-31 00:13:33 -0500813 /* Register the status FIFO address range. We could use the same FIFO
814 * for targets at different nodes. However we need different FIFOs per
Stefan Richtera54c9d32006-05-15 22:09:46 +0200815 * target in order to support multi-unit devices.
816 * The FIFO is located out of the local host controller's physical range
817 * but, if possible, within the posted write area. Status writes will
818 * then be performed as unified transactions. This slightly reduces
819 * bandwidth usage, and some Prolific based devices seem to require it.
820 */
Stefan Richter138c8af2006-11-02 21:16:08 +0100821 lu->status_fifo_addr = hpsb_allocate_and_register_addrspace(
Stefan Richter35bdddb2006-01-31 00:13:33 -0500822 &sbp2_highlevel, ud->ne->host, &sbp2_ops,
823 sizeof(struct sbp2_status_block), sizeof(quadlet_t),
Ben Collins40ae6c52006-06-12 18:13:49 -0400824 ud->ne->host->low_addr_space, CSR1212_ALL_SPACE_END);
Stefan Richter138c8af2006-11-02 21:16:08 +0100825 if (lu->status_fifo_addr == CSR1212_INVALID_ADDR_SPACE) {
Stefan Richter35bdddb2006-01-31 00:13:33 -0500826 SBP2_ERR("failed to allocate status FIFO address range");
827 goto failed_alloc;
828 }
829
Stefan Richter138c8af2006-11-02 21:16:08 +0100830 shost = scsi_host_alloc(&sbp2_shost_template, sizeof(unsigned long));
831 if (!shost) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832 SBP2_ERR("failed to register scsi host");
833 goto failed_alloc;
834 }
835
Stefan Richter138c8af2006-11-02 21:16:08 +0100836 shost->hostdata[0] = (unsigned long)lu;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837
Stefan Richter138c8af2006-11-02 21:16:08 +0100838 if (!scsi_add_host(shost, &ud->device)) {
839 lu->shost = shost;
840 return lu;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841 }
842
843 SBP2_ERR("failed to add scsi host");
Stefan Richter138c8af2006-11-02 21:16:08 +0100844 scsi_host_put(shost);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845
846failed_alloc:
Stefan Richter138c8af2006-11-02 21:16:08 +0100847 sbp2_remove_device(lu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848 return NULL;
849}
850
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851static void sbp2_host_reset(struct hpsb_host *host)
852{
Stefan Richterca0c7452006-11-02 21:16:08 +0100853 struct sbp2_fwhost_info *hi;
Stefan Richter138c8af2006-11-02 21:16:08 +0100854 struct sbp2_lu *lu;
Stefan Richter261b5f62007-08-11 11:52:08 +0200855 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856
857 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
Stefan Richter2cccbb52006-08-14 18:59:00 +0200858 if (!hi)
859 return;
Stefan Richter261b5f62007-08-11 11:52:08 +0200860
861 read_lock_irqsave(&sbp2_hi_logical_units_lock, flags);
Stefan Richter138c8af2006-11-02 21:16:08 +0100862 list_for_each_entry(lu, &hi->logical_units, lu_list)
863 if (likely(atomic_read(&lu->state) !=
Stefan Richter2cccbb52006-08-14 18:59:00 +0200864 SBP2LU_STATE_IN_SHUTDOWN)) {
Stefan Richter138c8af2006-11-02 21:16:08 +0100865 atomic_set(&lu->state, SBP2LU_STATE_IN_RESET);
866 scsi_block_requests(lu->shost);
Stefan Richter09ee67a2006-08-14 18:43:00 +0200867 }
Stefan Richter261b5f62007-08-11 11:52:08 +0200868 read_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869}
870
Stefan Richter138c8af2006-11-02 21:16:08 +0100871static int sbp2_start_device(struct sbp2_lu *lu)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872{
Stefan Richter138c8af2006-11-02 21:16:08 +0100873 struct sbp2_fwhost_info *hi = lu->hi;
James Bottomley146f7262005-09-10 12:44:09 -0500874 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875
Stefan Richter97d552e2006-12-29 23:47:04 +0100876 lu->login_response = dma_alloc_coherent(hi->host->device.parent,
Stefan Richtera237f352005-11-07 06:31:39 -0500877 sizeof(struct sbp2_login_response),
Stefan Richter9b7d9c02006-11-22 21:44:34 +0100878 &lu->login_response_dma, GFP_KERNEL);
Stefan Richter138c8af2006-11-02 21:16:08 +0100879 if (!lu->login_response)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880 goto alloc_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881
Stefan Richter97d552e2006-12-29 23:47:04 +0100882 lu->query_logins_orb = dma_alloc_coherent(hi->host->device.parent,
Stefan Richtera237f352005-11-07 06:31:39 -0500883 sizeof(struct sbp2_query_logins_orb),
Stefan Richter9b7d9c02006-11-22 21:44:34 +0100884 &lu->query_logins_orb_dma, GFP_KERNEL);
Stefan Richter138c8af2006-11-02 21:16:08 +0100885 if (!lu->query_logins_orb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886 goto alloc_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887
Stefan Richter97d552e2006-12-29 23:47:04 +0100888 lu->query_logins_response = dma_alloc_coherent(hi->host->device.parent,
Stefan Richtera237f352005-11-07 06:31:39 -0500889 sizeof(struct sbp2_query_logins_response),
Stefan Richter9b7d9c02006-11-22 21:44:34 +0100890 &lu->query_logins_response_dma, GFP_KERNEL);
Stefan Richter138c8af2006-11-02 21:16:08 +0100891 if (!lu->query_logins_response)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892 goto alloc_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893
Stefan Richter97d552e2006-12-29 23:47:04 +0100894 lu->reconnect_orb = dma_alloc_coherent(hi->host->device.parent,
Stefan Richtera237f352005-11-07 06:31:39 -0500895 sizeof(struct sbp2_reconnect_orb),
Stefan Richter9b7d9c02006-11-22 21:44:34 +0100896 &lu->reconnect_orb_dma, GFP_KERNEL);
Stefan Richter138c8af2006-11-02 21:16:08 +0100897 if (!lu->reconnect_orb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898 goto alloc_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899
Stefan Richter97d552e2006-12-29 23:47:04 +0100900 lu->logout_orb = dma_alloc_coherent(hi->host->device.parent,
Stefan Richtera237f352005-11-07 06:31:39 -0500901 sizeof(struct sbp2_logout_orb),
Stefan Richter9b7d9c02006-11-22 21:44:34 +0100902 &lu->logout_orb_dma, GFP_KERNEL);
Stefan Richter138c8af2006-11-02 21:16:08 +0100903 if (!lu->logout_orb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904 goto alloc_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905
Stefan Richter97d552e2006-12-29 23:47:04 +0100906 lu->login_orb = dma_alloc_coherent(hi->host->device.parent,
Stefan Richtera237f352005-11-07 06:31:39 -0500907 sizeof(struct sbp2_login_orb),
Stefan Richter9b7d9c02006-11-22 21:44:34 +0100908 &lu->login_orb_dma, GFP_KERNEL);
Stefan Richter138c8af2006-11-02 21:16:08 +0100909 if (!lu->login_orb)
Stefan Richtereaceec72005-12-13 11:05:05 -0500910 goto alloc_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911
Stefan Richter3d269cb2007-02-04 20:57:38 +0100912 if (sbp2util_create_command_orb_pool(lu))
913 goto alloc_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914
Stefan Richtere8ca5662006-11-02 21:16:08 +0100915 /* Wait a second before trying to log in. Previously logged in
916 * initiators need a chance to reconnect. */
Stefan Richter902abed2006-08-14 18:56:00 +0200917 if (msleep_interruptible(1000)) {
Stefan Richter138c8af2006-11-02 21:16:08 +0100918 sbp2_remove_device(lu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919 return -EINTR;
920 }
Stefan Richtera237f352005-11-07 06:31:39 -0500921
Stefan Richter138c8af2006-11-02 21:16:08 +0100922 if (sbp2_login_device(lu)) {
923 sbp2_remove_device(lu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924 return -EBUSY;
925 }
926
Stefan Richter138c8af2006-11-02 21:16:08 +0100927 sbp2_set_busy_timeout(lu);
928 sbp2_agent_reset(lu, 1);
929 sbp2_max_speed_and_size(lu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930
Stefan Richterd94a9832008-02-03 23:07:44 +0100931 if (lu->workarounds & SBP2_WORKAROUND_DELAY_INQUIRY)
932 ssleep(SBP2_INQUIRY_DELAY);
933
Stefan Richter138c8af2006-11-02 21:16:08 +0100934 error = scsi_add_device(lu->shost, 0, lu->ud->id, 0);
James Bottomley146f7262005-09-10 12:44:09 -0500935 if (error) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936 SBP2_ERR("scsi_add_device failed");
Stefan Richter138c8af2006-11-02 21:16:08 +0100937 sbp2_logout_device(lu);
938 sbp2_remove_device(lu);
James Bottomley146f7262005-09-10 12:44:09 -0500939 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940 }
941
942 return 0;
Stefan Richtereaceec72005-12-13 11:05:05 -0500943
944alloc_fail:
Stefan Richter138c8af2006-11-02 21:16:08 +0100945 SBP2_ERR("Could not allocate memory for lu");
946 sbp2_remove_device(lu);
Stefan Richtereaceec72005-12-13 11:05:05 -0500947 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948}
949
Stefan Richter138c8af2006-11-02 21:16:08 +0100950static void sbp2_remove_device(struct sbp2_lu *lu)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951{
Stefan Richterca0c7452006-11-02 21:16:08 +0100952 struct sbp2_fwhost_info *hi;
Stefan Richter261b5f62007-08-11 11:52:08 +0200953 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954
Stefan Richter138c8af2006-11-02 21:16:08 +0100955 if (!lu)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700956 return;
Stefan Richter138c8af2006-11-02 21:16:08 +0100957 hi = lu->hi;
Stefan Richtera2ee3f92007-08-11 11:51:16 +0200958 if (!hi)
959 goto no_hi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960
Stefan Richter138c8af2006-11-02 21:16:08 +0100961 if (lu->shost) {
962 scsi_remove_host(lu->shost);
963 scsi_host_put(lu->shost);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964 }
Stefan Richter09ee67a2006-08-14 18:43:00 +0200965 flush_scheduled_work();
Stefan Richtera2ee3f92007-08-11 11:51:16 +0200966 sbp2util_remove_command_orb_pool(lu, hi->host);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967
Stefan Richter261b5f62007-08-11 11:52:08 +0200968 write_lock_irqsave(&sbp2_hi_logical_units_lock, flags);
Stefan Richter138c8af2006-11-02 21:16:08 +0100969 list_del(&lu->lu_list);
Stefan Richter261b5f62007-08-11 11:52:08 +0200970 write_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971
Stefan Richter138c8af2006-11-02 21:16:08 +0100972 if (lu->login_response)
Stefan Richter97d552e2006-12-29 23:47:04 +0100973 dma_free_coherent(hi->host->device.parent,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974 sizeof(struct sbp2_login_response),
Stefan Richter138c8af2006-11-02 21:16:08 +0100975 lu->login_response,
976 lu->login_response_dma);
977 if (lu->login_orb)
Stefan Richter97d552e2006-12-29 23:47:04 +0100978 dma_free_coherent(hi->host->device.parent,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979 sizeof(struct sbp2_login_orb),
Stefan Richter138c8af2006-11-02 21:16:08 +0100980 lu->login_orb,
981 lu->login_orb_dma);
982 if (lu->reconnect_orb)
Stefan Richter97d552e2006-12-29 23:47:04 +0100983 dma_free_coherent(hi->host->device.parent,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984 sizeof(struct sbp2_reconnect_orb),
Stefan Richter138c8af2006-11-02 21:16:08 +0100985 lu->reconnect_orb,
986 lu->reconnect_orb_dma);
987 if (lu->logout_orb)
Stefan Richter97d552e2006-12-29 23:47:04 +0100988 dma_free_coherent(hi->host->device.parent,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989 sizeof(struct sbp2_logout_orb),
Stefan Richter138c8af2006-11-02 21:16:08 +0100990 lu->logout_orb,
991 lu->logout_orb_dma);
992 if (lu->query_logins_orb)
Stefan Richter97d552e2006-12-29 23:47:04 +0100993 dma_free_coherent(hi->host->device.parent,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994 sizeof(struct sbp2_query_logins_orb),
Stefan Richter138c8af2006-11-02 21:16:08 +0100995 lu->query_logins_orb,
996 lu->query_logins_orb_dma);
997 if (lu->query_logins_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_query_logins_response),
Stefan Richter138c8af2006-11-02 21:16:08 +01001000 lu->query_logins_response,
1001 lu->query_logins_response_dma);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001002
Stefan Richter138c8af2006-11-02 21:16:08 +01001003 if (lu->status_fifo_addr != CSR1212_INVALID_ADDR_SPACE)
Stefan Richter35bdddb2006-01-31 00:13:33 -05001004 hpsb_unregister_addrspace(&sbp2_highlevel, hi->host,
Stefan Richter138c8af2006-11-02 21:16:08 +01001005 lu->status_fifo_addr);
Stefan Richter35bdddb2006-01-31 00:13:33 -05001006
Stefan Richter138c8af2006-11-02 21:16:08 +01001007 lu->ud->device.driver_data = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008
Stefan Richtera2ee3f92007-08-11 11:51:16 +02001009 module_put(hi->host->driver->owner);
1010no_hi:
Stefan Richter138c8af2006-11-02 21:16:08 +01001011 kfree(lu);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012}
1013
1014#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
1015/*
Stefan Richtere8ca5662006-11-02 21:16:08 +01001016 * Deal with write requests on adapters which do not support physical DMA or
1017 * have it switched off.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001018 */
Stefan Richtera237f352005-11-07 06:31:39 -05001019static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid,
1020 int destid, quadlet_t *data, u64 addr,
1021 size_t length, u16 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022{
Stefan Richtera237f352005-11-07 06:31:39 -05001023 memcpy(bus_to_virt((u32) addr), data, length);
Stefan Richtera237f352005-11-07 06:31:39 -05001024 return RCODE_COMPLETE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025}
1026
1027/*
Stefan Richtere8ca5662006-11-02 21:16:08 +01001028 * Deal with read requests on adapters which do not support physical DMA or
1029 * have it switched off.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030 */
Stefan Richtera237f352005-11-07 06:31:39 -05001031static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid,
1032 quadlet_t *data, u64 addr, size_t length,
1033 u16 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034{
Stefan Richtera237f352005-11-07 06:31:39 -05001035 memcpy(data, bus_to_virt((u32) addr), length);
Stefan Richtera237f352005-11-07 06:31:39 -05001036 return RCODE_COMPLETE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037}
1038#endif
1039
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040/**************************************
1041 * SBP-2 protocol related section
1042 **************************************/
1043
Stefan Richter138c8af2006-11-02 21:16:08 +01001044static int sbp2_query_logins(struct sbp2_lu *lu)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045{
Stefan Richter138c8af2006-11-02 21:16:08 +01001046 struct sbp2_fwhost_info *hi = lu->hi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047 quadlet_t data[2];
1048 int max_logins;
1049 int active_logins;
1050
Stefan Richter138c8af2006-11-02 21:16:08 +01001051 lu->query_logins_orb->reserved1 = 0x0;
1052 lu->query_logins_orb->reserved2 = 0x0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001053
Stefan Richter138c8af2006-11-02 21:16:08 +01001054 lu->query_logins_orb->query_response_lo = lu->query_logins_response_dma;
1055 lu->query_logins_orb->query_response_hi =
1056 ORB_SET_NODE_ID(hi->host->node_id);
1057 lu->query_logins_orb->lun_misc =
1058 ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST);
1059 lu->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1);
1060 lu->query_logins_orb->lun_misc |= ORB_SET_LUN(lu->lun);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061
Stefan Richter138c8af2006-11-02 21:16:08 +01001062 lu->query_logins_orb->reserved_resp_length =
1063 ORB_SET_QUERY_LOGINS_RESP_LENGTH(
1064 sizeof(struct sbp2_query_logins_response));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065
Stefan Richter138c8af2006-11-02 21:16:08 +01001066 lu->query_logins_orb->status_fifo_hi =
1067 ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
1068 lu->query_logins_orb->status_fifo_lo =
1069 ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070
Stefan Richter138c8af2006-11-02 21:16:08 +01001071 sbp2util_cpu_to_be32_buffer(lu->query_logins_orb,
1072 sizeof(struct sbp2_query_logins_orb));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073
Stefan Richter138c8af2006-11-02 21:16:08 +01001074 memset(lu->query_logins_response, 0,
1075 sizeof(struct sbp2_query_logins_response));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076
Linus Torvalds1da177e2005-04-16 15:20:36 -07001077 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
Stefan Richter138c8af2006-11-02 21:16:08 +01001078 data[1] = lu->query_logins_orb_dma;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079 sbp2util_cpu_to_be32_buffer(data, 8);
1080
Stefan Richter138c8af2006-11-02 21:16:08 +01001081 hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082
Stefan Richter138c8af2006-11-02 21:16:08 +01001083 if (sbp2util_access_timeout(lu, 2*HZ)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
Stefan Richtera237f352005-11-07 06:31:39 -05001085 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086 }
1087
Stefan Richter138c8af2006-11-02 21:16:08 +01001088 if (lu->status_block.ORB_offset_lo != lu->query_logins_orb_dma) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001089 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
Stefan Richtera237f352005-11-07 06:31:39 -05001090 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091 }
1092
Stefan Richter138c8af2006-11-02 21:16:08 +01001093 if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) {
Stefan Richter60657722006-07-23 22:18:00 +02001094 SBP2_INFO("Error querying logins to SBP-2 device - failed");
Stefan Richtera237f352005-11-07 06:31:39 -05001095 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096 }
1097
Stefan Richter138c8af2006-11-02 21:16:08 +01001098 sbp2util_cpu_to_be32_buffer(lu->query_logins_response,
1099 sizeof(struct sbp2_query_logins_response));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100
Stefan Richter138c8af2006-11-02 21:16:08 +01001101 max_logins = RESPONSE_GET_MAX_LOGINS(
1102 lu->query_logins_response->length_max_logins);
Ben Collins20f45782006-06-12 18:13:11 -04001103 SBP2_INFO("Maximum concurrent logins supported: %d", max_logins);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104
Stefan Richter138c8af2006-11-02 21:16:08 +01001105 active_logins = RESPONSE_GET_ACTIVE_LOGINS(
1106 lu->query_logins_response->length_max_logins);
Ben Collins20f45782006-06-12 18:13:11 -04001107 SBP2_INFO("Number of active logins: %d", active_logins);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108
1109 if (active_logins >= max_logins) {
Stefan Richtera237f352005-11-07 06:31:39 -05001110 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111 }
1112
1113 return 0;
1114}
1115
Stefan Richter138c8af2006-11-02 21:16:08 +01001116static int sbp2_login_device(struct sbp2_lu *lu)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001117{
Stefan Richter138c8af2006-11-02 21:16:08 +01001118 struct sbp2_fwhost_info *hi = lu->hi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119 quadlet_t data[2];
1120
Stefan Richter138c8af2006-11-02 21:16:08 +01001121 if (!lu->login_orb)
Stefan Richtera237f352005-11-07 06:31:39 -05001122 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001123
Stefan Richter138c8af2006-11-02 21:16:08 +01001124 if (!sbp2_exclusive_login && sbp2_query_logins(lu)) {
Stefan Richterca0c7452006-11-02 21:16:08 +01001125 SBP2_INFO("Device does not support any more concurrent logins");
1126 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127 }
1128
Stefan Richtere8ca5662006-11-02 21:16:08 +01001129 /* assume no password */
Stefan Richter138c8af2006-11-02 21:16:08 +01001130 lu->login_orb->password_hi = 0;
1131 lu->login_orb->password_lo = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132
Stefan Richter138c8af2006-11-02 21:16:08 +01001133 lu->login_orb->login_response_lo = lu->login_response_dma;
1134 lu->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
1135 lu->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST);
Stefan Richtere8ca5662006-11-02 21:16:08 +01001136
1137 /* one second reconnect time */
Stefan Richter138c8af2006-11-02 21:16:08 +01001138 lu->login_orb->lun_misc |= ORB_SET_RECONNECT(0);
1139 lu->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(sbp2_exclusive_login);
1140 lu->login_orb->lun_misc |= ORB_SET_NOTIFY(1);
1141 lu->login_orb->lun_misc |= ORB_SET_LUN(lu->lun);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142
Stefan Richter138c8af2006-11-02 21:16:08 +01001143 lu->login_orb->passwd_resp_lengths =
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144 ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145
Stefan Richter138c8af2006-11-02 21:16:08 +01001146 lu->login_orb->status_fifo_hi =
1147 ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
1148 lu->login_orb->status_fifo_lo =
1149 ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150
Stefan Richter138c8af2006-11-02 21:16:08 +01001151 sbp2util_cpu_to_be32_buffer(lu->login_orb,
1152 sizeof(struct sbp2_login_orb));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001153
Stefan Richter138c8af2006-11-02 21:16:08 +01001154 memset(lu->login_response, 0, sizeof(struct sbp2_login_response));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001155
Linus Torvalds1da177e2005-04-16 15:20:36 -07001156 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
Stefan Richter138c8af2006-11-02 21:16:08 +01001157 data[1] = lu->login_orb_dma;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001158 sbp2util_cpu_to_be32_buffer(data, 8);
1159
Stefan Richter138c8af2006-11-02 21:16:08 +01001160 hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001161
Stefan Richtere8ca5662006-11-02 21:16:08 +01001162 /* wait up to 20 seconds for login status */
Stefan Richter138c8af2006-11-02 21:16:08 +01001163 if (sbp2util_access_timeout(lu, 20*HZ)) {
Stefan Richtere8398bb2006-07-23 22:19:00 +02001164 SBP2_ERR("Error logging into SBP-2 device - timed out");
Stefan Richtera237f352005-11-07 06:31:39 -05001165 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166 }
1167
Stefan Richtere8ca5662006-11-02 21:16:08 +01001168 /* make sure that the returned status matches the login ORB */
Stefan Richter138c8af2006-11-02 21:16:08 +01001169 if (lu->status_block.ORB_offset_lo != lu->login_orb_dma) {
Stefan Richter60657722006-07-23 22:18:00 +02001170 SBP2_ERR("Error logging into SBP-2 device - timed out");
Stefan Richtera237f352005-11-07 06:31:39 -05001171 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172 }
1173
Stefan Richter138c8af2006-11-02 21:16:08 +01001174 if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) {
Stefan Richter60657722006-07-23 22:18:00 +02001175 SBP2_ERR("Error logging into SBP-2 device - failed");
Stefan Richtera237f352005-11-07 06:31:39 -05001176 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001177 }
1178
Stefan Richter138c8af2006-11-02 21:16:08 +01001179 sbp2util_cpu_to_be32_buffer(lu->login_response,
1180 sizeof(struct sbp2_login_response));
1181 lu->command_block_agent_addr =
1182 ((u64)lu->login_response->command_block_agent_hi) << 32;
1183 lu->command_block_agent_addr |=
1184 ((u64)lu->login_response->command_block_agent_lo);
1185 lu->command_block_agent_addr &= 0x0000ffffffffffffULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001186
1187 SBP2_INFO("Logged into SBP-2 device");
Stefan Richtera237f352005-11-07 06:31:39 -05001188 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189}
1190
Stefan Richter138c8af2006-11-02 21:16:08 +01001191static int sbp2_logout_device(struct sbp2_lu *lu)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001192{
Stefan Richter138c8af2006-11-02 21:16:08 +01001193 struct sbp2_fwhost_info *hi = lu->hi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194 quadlet_t data[2];
1195 int error;
1196
Stefan Richter138c8af2006-11-02 21:16:08 +01001197 lu->logout_orb->reserved1 = 0x0;
1198 lu->logout_orb->reserved2 = 0x0;
1199 lu->logout_orb->reserved3 = 0x0;
1200 lu->logout_orb->reserved4 = 0x0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201
Stefan Richter138c8af2006-11-02 21:16:08 +01001202 lu->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST);
1203 lu->logout_orb->login_ID_misc |=
1204 ORB_SET_LOGIN_ID(lu->login_response->length_login_ID);
1205 lu->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001206
Stefan Richter138c8af2006-11-02 21:16:08 +01001207 lu->logout_orb->reserved5 = 0x0;
1208 lu->logout_orb->status_fifo_hi =
1209 ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
1210 lu->logout_orb->status_fifo_lo =
1211 ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212
Stefan Richter138c8af2006-11-02 21:16:08 +01001213 sbp2util_cpu_to_be32_buffer(lu->logout_orb,
1214 sizeof(struct sbp2_logout_orb));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215
Linus Torvalds1da177e2005-04-16 15:20:36 -07001216 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
Stefan Richter138c8af2006-11-02 21:16:08 +01001217 data[1] = lu->logout_orb_dma;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001218 sbp2util_cpu_to_be32_buffer(data, 8);
1219
Stefan Richter138c8af2006-11-02 21:16:08 +01001220 error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001221 if (error)
1222 return error;
1223
Stefan Richtere8ca5662006-11-02 21:16:08 +01001224 /* wait up to 1 second for the device to complete logout */
Stefan Richter138c8af2006-11-02 21:16:08 +01001225 if (sbp2util_access_timeout(lu, HZ))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001226 return -EIO;
1227
1228 SBP2_INFO("Logged out of SBP-2 device");
Stefan Richtera237f352005-11-07 06:31:39 -05001229 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230}
1231
Stefan Richter138c8af2006-11-02 21:16:08 +01001232static int sbp2_reconnect_device(struct sbp2_lu *lu)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233{
Stefan Richter138c8af2006-11-02 21:16:08 +01001234 struct sbp2_fwhost_info *hi = lu->hi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001235 quadlet_t data[2];
1236 int error;
1237
Stefan Richter138c8af2006-11-02 21:16:08 +01001238 lu->reconnect_orb->reserved1 = 0x0;
1239 lu->reconnect_orb->reserved2 = 0x0;
1240 lu->reconnect_orb->reserved3 = 0x0;
1241 lu->reconnect_orb->reserved4 = 0x0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242
Stefan Richter138c8af2006-11-02 21:16:08 +01001243 lu->reconnect_orb->login_ID_misc =
1244 ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST);
1245 lu->reconnect_orb->login_ID_misc |=
1246 ORB_SET_LOGIN_ID(lu->login_response->length_login_ID);
1247 lu->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248
Stefan Richter138c8af2006-11-02 21:16:08 +01001249 lu->reconnect_orb->reserved5 = 0x0;
1250 lu->reconnect_orb->status_fifo_hi =
1251 ORB_SET_STATUS_FIFO_HI(lu->status_fifo_addr, hi->host->node_id);
1252 lu->reconnect_orb->status_fifo_lo =
1253 ORB_SET_STATUS_FIFO_LO(lu->status_fifo_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254
Stefan Richter138c8af2006-11-02 21:16:08 +01001255 sbp2util_cpu_to_be32_buffer(lu->reconnect_orb,
1256 sizeof(struct sbp2_reconnect_orb));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001257
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
Stefan Richter138c8af2006-11-02 21:16:08 +01001259 data[1] = lu->reconnect_orb_dma;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260 sbp2util_cpu_to_be32_buffer(data, 8);
1261
Stefan Richter138c8af2006-11-02 21:16:08 +01001262 error = hpsb_node_write(lu->ne, lu->management_agent_addr, data, 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001263 if (error)
1264 return error;
1265
Stefan Richtere8ca5662006-11-02 21:16:08 +01001266 /* wait up to 1 second for reconnect status */
Stefan Richter138c8af2006-11-02 21:16:08 +01001267 if (sbp2util_access_timeout(lu, HZ)) {
Stefan Richtere8398bb2006-07-23 22:19:00 +02001268 SBP2_ERR("Error reconnecting to SBP-2 device - timed out");
Stefan Richtera237f352005-11-07 06:31:39 -05001269 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001270 }
1271
Stefan Richtere8ca5662006-11-02 21:16:08 +01001272 /* make sure that the returned status matches the reconnect ORB */
Stefan Richter138c8af2006-11-02 21:16:08 +01001273 if (lu->status_block.ORB_offset_lo != lu->reconnect_orb_dma) {
Stefan Richter60657722006-07-23 22:18:00 +02001274 SBP2_ERR("Error reconnecting to SBP-2 device - timed out");
Stefan Richtera237f352005-11-07 06:31:39 -05001275 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276 }
1277
Stefan Richter138c8af2006-11-02 21:16:08 +01001278 if (STATUS_TEST_RDS(lu->status_block.ORB_offset_hi_misc)) {
Stefan Richter60657722006-07-23 22:18:00 +02001279 SBP2_ERR("Error reconnecting to SBP-2 device - failed");
Stefan Richtera237f352005-11-07 06:31:39 -05001280 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001281 }
1282
Stefan Richter35644092006-11-02 21:16:08 +01001283 SBP2_INFO("Reconnected to SBP-2 device");
Stefan Richtera237f352005-11-07 06:31:39 -05001284 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001285}
1286
1287/*
Stefan Richtere8ca5662006-11-02 21:16:08 +01001288 * Set the target node's Single Phase Retry limit. Affects the target's retry
1289 * behaviour if our node is too busy to accept requests.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290 */
Stefan Richter138c8af2006-11-02 21:16:08 +01001291static int sbp2_set_busy_timeout(struct sbp2_lu *lu)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001292{
1293 quadlet_t data;
1294
Linus Torvalds1da177e2005-04-16 15:20:36 -07001295 data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE);
Stefan Richter138c8af2006-11-02 21:16:08 +01001296 if (hpsb_node_write(lu->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4))
Harvey Harrisonb1ce1fd2008-03-05 18:24:54 -08001297 SBP2_ERR("%s error", __func__);
Stefan Richtera237f352005-11-07 06:31:39 -05001298 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001299}
1300
Stefan Richter138c8af2006-11-02 21:16:08 +01001301static void sbp2_parse_unit_directory(struct sbp2_lu *lu,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001302 struct unit_directory *ud)
1303{
1304 struct csr1212_keyval *kv;
1305 struct csr1212_dentry *dentry;
1306 u64 management_agent_addr;
Stefan Richter9117c6d2006-11-02 21:16:08 +01001307 u32 unit_characteristics, firmware_revision;
Stefan Richter24d3bf82006-05-15 22:04:59 +02001308 unsigned workarounds;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309 int i;
1310
Stefan Richter9117c6d2006-11-02 21:16:08 +01001311 management_agent_addr = 0;
1312 unit_characteristics = 0;
1313 firmware_revision = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001314
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315 csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) {
1316 switch (kv->key.id) {
1317 case CSR1212_KV_ID_DEPENDENT_INFO:
Stefan Richteredf1fb22006-11-02 21:16:08 +01001318 if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001319 management_agent_addr =
Stefan Richtera237f352005-11-07 06:31:39 -05001320 CSR1212_REGISTER_SPACE_BASE +
1321 (kv->value.csr_offset << 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001322
Stefan Richteredf1fb22006-11-02 21:16:08 +01001323 else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE)
Stefan Richter138c8af2006-11-02 21:16:08 +01001324 lu->lun = ORB_SET_LUN(kv->value.immediate);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001325 break;
1326
Linus Torvalds1da177e2005-04-16 15:20:36 -07001327 case SBP2_UNIT_CHARACTERISTICS_KEY:
Stefan Richtere8ca5662006-11-02 21:16:08 +01001328 /* FIXME: This is ignored so far.
1329 * See SBP-2 clause 7.4.8. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330 unit_characteristics = kv->value.immediate;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001331 break;
1332
1333 case SBP2_FIRMWARE_REVISION_KEY:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001334 firmware_revision = kv->value.immediate;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001335 break;
1336
1337 default:
Stefan Richtere8ca5662006-11-02 21:16:08 +01001338 /* FIXME: Check for SBP2_DEVICE_TYPE_AND_LUN_KEY.
1339 * Its "ordered" bit has consequences for command ORB
1340 * list handling. See SBP-2 clauses 4.6, 7.4.11, 10.2 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001341 break;
1342 }
1343 }
1344
Stefan Richter24d3bf82006-05-15 22:04:59 +02001345 workarounds = sbp2_default_workarounds;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001346
Stefan Richter679c0cd2006-05-15 22:08:09 +02001347 if (!(workarounds & SBP2_WORKAROUND_OVERRIDE))
1348 for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) {
Stefan Richter4618fd32006-12-30 15:37:09 +01001349 if (sbp2_workarounds_table[i].firmware_revision !=
1350 SBP2_ROM_VALUE_WILDCARD &&
Stefan Richter679c0cd2006-05-15 22:08:09 +02001351 sbp2_workarounds_table[i].firmware_revision !=
1352 (firmware_revision & 0xffff00))
1353 continue;
Stefan Richter4618fd32006-12-30 15:37:09 +01001354 if (sbp2_workarounds_table[i].model_id !=
1355 SBP2_ROM_VALUE_WILDCARD &&
Stefan Richter679c0cd2006-05-15 22:08:09 +02001356 sbp2_workarounds_table[i].model_id != ud->model_id)
1357 continue;
1358 workarounds |= sbp2_workarounds_table[i].workarounds;
1359 break;
1360 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001361
Stefan Richter24d3bf82006-05-15 22:04:59 +02001362 if (workarounds)
Stefan Richtere9a1c522006-05-15 22:06:37 +02001363 SBP2_INFO("Workarounds for node " NODE_BUS_FMT ": 0x%x "
1364 "(firmware_revision 0x%06x, vendor_id 0x%06x,"
1365 " model_id 0x%06x)",
Stefan Richter24d3bf82006-05-15 22:04:59 +02001366 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid),
Stefan Richtere9a1c522006-05-15 22:06:37 +02001367 workarounds, firmware_revision,
1368 ud->vendor_id ? ud->vendor_id : ud->ne->vendor_id,
1369 ud->model_id);
Stefan Richter24d3bf82006-05-15 22:04:59 +02001370
1371 /* We would need one SCSI host template for each target to adjust
1372 * max_sectors on the fly, therefore warn only. */
1373 if (workarounds & SBP2_WORKAROUND_128K_MAX_TRANS &&
Stefan Richterca0c7452006-11-02 21:16:08 +01001374 (sbp2_max_sectors * 512) > (128 * 1024))
Stefan Richter35644092006-11-02 21:16:08 +01001375 SBP2_INFO("Node " NODE_BUS_FMT ": Bridge only supports 128KB "
Stefan Richter24d3bf82006-05-15 22:04:59 +02001376 "max transfer size. WARNING: Current max_sectors "
1377 "setting is larger than 128KB (%d sectors)",
1378 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid),
Stefan Richterca0c7452006-11-02 21:16:08 +01001379 sbp2_max_sectors);
Stefan Richter24d3bf82006-05-15 22:04:59 +02001380
Linus Torvalds1da177e2005-04-16 15:20:36 -07001381 /* If this is a logical unit directory entry, process the parent
1382 * to get the values. */
1383 if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) {
Stefan Richter138c8af2006-11-02 21:16:08 +01001384 struct unit_directory *parent_ud = container_of(
1385 ud->device.parent, struct unit_directory, device);
1386 sbp2_parse_unit_directory(lu, parent_ud);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001387 } else {
Stefan Richter138c8af2006-11-02 21:16:08 +01001388 lu->management_agent_addr = management_agent_addr;
1389 lu->workarounds = workarounds;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001390 if (ud->flags & UNIT_DIRECTORY_HAS_LUN)
Stefan Richter138c8af2006-11-02 21:16:08 +01001391 lu->lun = ORB_SET_LUN(ud->lun);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001392 }
1393}
1394
Ben Collinsfd23ade2006-06-12 18:14:14 -04001395#define SBP2_PAYLOAD_TO_BYTES(p) (1 << ((p) + 2))
1396
Linus Torvalds1da177e2005-04-16 15:20:36 -07001397/*
1398 * This function is called in order to determine the max speed and packet
1399 * size we can use in our ORBs. Note, that we (the driver and host) only
1400 * initiate the transaction. The SBP-2 device actually transfers the data
1401 * (by reading from the DMA area we tell it). This means that the SBP-2
1402 * device decides the actual maximum data it can transfer. We just tell it
1403 * the speed that it needs to use, and the max_rec the host supports, and
1404 * it takes care of the rest.
1405 */
Stefan Richter138c8af2006-11-02 21:16:08 +01001406static int sbp2_max_speed_and_size(struct sbp2_lu *lu)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001407{
Stefan Richter138c8af2006-11-02 21:16:08 +01001408 struct sbp2_fwhost_info *hi = lu->hi;
Ben Collinsfd23ade2006-06-12 18:14:14 -04001409 u8 payload;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410
Stefan Richter138c8af2006-11-02 21:16:08 +01001411 lu->speed_code = hi->host->speed[NODEID_TO_NODE(lu->ne->nodeid)];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001412
Stefan Richter138c8af2006-11-02 21:16:08 +01001413 if (lu->speed_code > sbp2_max_speed) {
1414 lu->speed_code = sbp2_max_speed;
Stefan Richterca0c7452006-11-02 21:16:08 +01001415 SBP2_INFO("Reducing speed to %s",
1416 hpsb_speedto_str[sbp2_max_speed]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001417 }
1418
1419 /* Payload size is the lesser of what our speed supports and what
1420 * our host supports. */
Stefan Richter138c8af2006-11-02 21:16:08 +01001421 payload = min(sbp2_speedto_max_payload[lu->speed_code],
Ben Collinsfd23ade2006-06-12 18:14:14 -04001422 (u8) (hi->host->csr.max_rec - 1));
1423
1424 /* If physical DMA is off, work around limitation in ohci1394:
1425 * packet size must not exceed PAGE_SIZE */
Stefan Richter138c8af2006-11-02 21:16:08 +01001426 if (lu->ne->host->low_addr_space < (1ULL << 32))
Ben Collinsfd23ade2006-06-12 18:14:14 -04001427 while (SBP2_PAYLOAD_TO_BYTES(payload) + 24 > PAGE_SIZE &&
1428 payload)
1429 payload--;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001430
Stefan Richter35644092006-11-02 21:16:08 +01001431 SBP2_INFO("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]",
Stefan Richter138c8af2006-11-02 21:16:08 +01001432 NODE_BUS_ARGS(hi->host, lu->ne->nodeid),
1433 hpsb_speedto_str[lu->speed_code],
Stefan Richter35644092006-11-02 21:16:08 +01001434 SBP2_PAYLOAD_TO_BYTES(payload));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001435
Stefan Richter138c8af2006-11-02 21:16:08 +01001436 lu->max_payload_size = payload;
Stefan Richtera237f352005-11-07 06:31:39 -05001437 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001438}
1439
Stefan Richter138c8af2006-11-02 21:16:08 +01001440static int sbp2_agent_reset(struct sbp2_lu *lu, int wait)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001441{
1442 quadlet_t data;
1443 u64 addr;
1444 int retval;
Stefan Richtercc078182006-07-23 22:12:00 +02001445 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001446
Stefan Richterec9b7e12006-12-07 23:23:25 +01001447 /* flush lu->protocol_work */
Stefan Richter09ee67a2006-08-14 18:43:00 +02001448 if (wait)
1449 flush_scheduled_work();
1450
Linus Torvalds1da177e2005-04-16 15:20:36 -07001451 data = ntohl(SBP2_AGENT_RESET_DATA);
Stefan Richter138c8af2006-11-02 21:16:08 +01001452 addr = lu->command_block_agent_addr + SBP2_AGENT_RESET_OFFSET;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001453
1454 if (wait)
Stefan Richter138c8af2006-11-02 21:16:08 +01001455 retval = hpsb_node_write(lu->ne, addr, &data, 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001456 else
Stefan Richter138c8af2006-11-02 21:16:08 +01001457 retval = sbp2util_node_write_no_wait(lu->ne, addr, &data, 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001458
1459 if (retval < 0) {
1460 SBP2_ERR("hpsb_node_write failed.\n");
1461 return -EIO;
1462 }
1463
Stefan Richtere8ca5662006-11-02 21:16:08 +01001464 /* make sure that the ORB_POINTER is written on next command */
Stefan Richter138c8af2006-11-02 21:16:08 +01001465 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1466 lu->last_orb = NULL;
1467 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001468
Stefan Richtera237f352005-11-07 06:31:39 -05001469 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001470}
1471
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001472static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb,
Stefan Richterca0c7452006-11-02 21:16:08 +01001473 struct sbp2_fwhost_info *hi,
Stefan Richter138c8af2006-11-02 21:16:08 +01001474 struct sbp2_command_info *cmd,
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001475 unsigned int scsi_use_sg,
Stefan Richter825f1df2007-11-04 14:59:24 +01001476 struct scatterlist *sg,
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001477 u32 orb_direction,
1478 enum dma_data_direction dma_dir)
1479{
Stefan Richter138c8af2006-11-02 21:16:08 +01001480 cmd->dma_dir = dma_dir;
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001481 orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1482 orb->misc |= ORB_SET_DIRECTION(orb_direction);
1483
Stefan Richtere8ca5662006-11-02 21:16:08 +01001484 /* special case if only one element (and less than 64KB in size) */
Stefan Richter5fcf5002008-02-01 22:31:10 +01001485 if (scsi_use_sg == 1 && sg->length <= SBP2_MAX_SG_ELEMENT_LENGTH) {
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001486
Stefan Richter5fcf5002008-02-01 22:31:10 +01001487 cmd->dma_size = sg->length;
Stefan Richter138c8af2006-11-02 21:16:08 +01001488 cmd->dma_type = CMD_DMA_PAGE;
Stefan Richter97d552e2006-12-29 23:47:04 +01001489 cmd->cmd_dma = dma_map_page(hi->host->device.parent,
Stefan Richter825f1df2007-11-04 14:59:24 +01001490 sg_page(sg), sg->offset,
Stefan Richter138c8af2006-11-02 21:16:08 +01001491 cmd->dma_size, cmd->dma_dir);
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001492
Stefan Richter138c8af2006-11-02 21:16:08 +01001493 orb->data_descriptor_lo = cmd->cmd_dma;
1494 orb->misc |= ORB_SET_DATA_SIZE(cmd->dma_size);
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001495
1496 } else {
1497 struct sbp2_unrestricted_page_table *sg_element =
Stefan Richter138c8af2006-11-02 21:16:08 +01001498 &cmd->scatter_gather_element[0];
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001499 u32 sg_count, sg_len;
1500 dma_addr_t sg_addr;
Stefan Richter825f1df2007-11-04 14:59:24 +01001501 int i, count = dma_map_sg(hi->host->device.parent, sg,
Stefan Richter97d552e2006-12-29 23:47:04 +01001502 scsi_use_sg, dma_dir);
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001503
Stefan Richter138c8af2006-11-02 21:16:08 +01001504 cmd->dma_size = scsi_use_sg;
Stefan Richter825f1df2007-11-04 14:59:24 +01001505 cmd->sge_buffer = sg;
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001506
1507 /* use page tables (s/g) */
1508 orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
Stefan Richter138c8af2006-11-02 21:16:08 +01001509 orb->data_descriptor_lo = cmd->sge_dma;
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001510
Stefan Richtere8ca5662006-11-02 21:16:08 +01001511 /* loop through and fill out our SBP-2 page tables
1512 * (and split up anything too large) */
Stefan Richter825f1df2007-11-04 14:59:24 +01001513 for (i = 0, sg_count = 0; i < count; i++, sg = sg_next(sg)) {
1514 sg_len = sg_dma_len(sg);
1515 sg_addr = sg_dma_address(sg);
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001516 while (sg_len) {
1517 sg_element[sg_count].segment_base_lo = sg_addr;
1518 if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
1519 sg_element[sg_count].length_segment_base_hi =
1520 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
1521 sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
1522 sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
1523 } else {
1524 sg_element[sg_count].length_segment_base_hi =
1525 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
1526 sg_len = 0;
1527 }
1528 sg_count++;
1529 }
1530 }
1531
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001532 orb->misc |= ORB_SET_DATA_SIZE(sg_count);
1533
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001534 sbp2util_cpu_to_be32_buffer(sg_element,
Stefan Richter138c8af2006-11-02 21:16:08 +01001535 (sizeof(struct sbp2_unrestricted_page_table)) *
1536 sg_count);
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001537 }
1538}
1539
Stefan Richter138c8af2006-11-02 21:16:08 +01001540static void sbp2_create_command_orb(struct sbp2_lu *lu,
1541 struct sbp2_command_info *cmd,
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001542 unchar *scsi_cmd,
1543 unsigned int scsi_use_sg,
1544 unsigned int scsi_request_bufflen,
Stefan Richter825f1df2007-11-04 14:59:24 +01001545 struct scatterlist *sg,
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001546 enum dma_data_direction dma_dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001547{
Stefan Richter138c8af2006-11-02 21:16:08 +01001548 struct sbp2_fwhost_info *hi = lu->hi;
Stefan Richter138c8af2006-11-02 21:16:08 +01001549 struct sbp2_command_orb *orb = &cmd->command_orb;
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001550 u32 orb_direction;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001551
1552 /*
Stefan Richtere8ca5662006-11-02 21:16:08 +01001553 * Set-up our command ORB.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001554 *
1555 * NOTE: We're doing unrestricted page tables (s/g), as this is
1556 * best performance (at least with the devices I have). This means
1557 * that data_size becomes the number of s/g elements, and
1558 * page_size should be zero (for unrestricted).
1559 */
Stefan Richter138c8af2006-11-02 21:16:08 +01001560 orb->next_ORB_hi = ORB_SET_NULL_PTR(1);
1561 orb->next_ORB_lo = 0x0;
1562 orb->misc = ORB_SET_MAX_PAYLOAD(lu->max_payload_size);
1563 orb->misc |= ORB_SET_SPEED(lu->speed_code);
1564 orb->misc |= ORB_SET_NOTIFY(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001565
Stefan Richter43863eb2005-12-12 23:03:24 -05001566 if (dma_dir == DMA_NONE)
Stefan Richtera237f352005-11-07 06:31:39 -05001567 orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
Stefan Richter43863eb2005-12-12 23:03:24 -05001568 else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen)
Stefan Richtera237f352005-11-07 06:31:39 -05001569 orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA;
Stefan Richter43863eb2005-12-12 23:03:24 -05001570 else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen)
Stefan Richtera237f352005-11-07 06:31:39 -05001571 orb_direction = ORB_DIRECTION_READ_FROM_MEDIA;
Stefan Richter43863eb2005-12-12 23:03:24 -05001572 else {
Stefan Richter35644092006-11-02 21:16:08 +01001573 SBP2_INFO("Falling back to DMA_NONE");
Stefan Richter43863eb2005-12-12 23:03:24 -05001574 orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001575 }
1576
Stefan Richtere8ca5662006-11-02 21:16:08 +01001577 /* set up our page table stuff */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001578 if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) {
Stefan Richter138c8af2006-11-02 21:16:08 +01001579 orb->data_descriptor_hi = 0x0;
1580 orb->data_descriptor_lo = 0x0;
1581 orb->misc |= ORB_SET_DIRECTION(1);
FUJITA Tomonorid7dea2c2007-05-14 20:00:04 +09001582 } else
Stefan Richter825f1df2007-11-04 14:59:24 +01001583 sbp2_prep_command_orb_sg(orb, hi, cmd, scsi_use_sg, sg,
Stefan Richter138c8af2006-11-02 21:16:08 +01001584 orb_direction, dma_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001585
Stefan Richter138c8af2006-11-02 21:16:08 +01001586 sbp2util_cpu_to_be32_buffer(orb, sizeof(*orb));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001587
Stefan Richter138c8af2006-11-02 21:16:08 +01001588 memset(orb->cdb, 0, 12);
1589 memcpy(orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001590}
1591
Stefan Richter138c8af2006-11-02 21:16:08 +01001592static void sbp2_link_orb_command(struct sbp2_lu *lu,
1593 struct sbp2_command_info *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001594{
Stefan Richter138c8af2006-11-02 21:16:08 +01001595 struct sbp2_fwhost_info *hi = lu->hi;
Stefan Richtercc078182006-07-23 22:12:00 +02001596 struct sbp2_command_orb *last_orb;
1597 dma_addr_t last_orb_dma;
Stefan Richter138c8af2006-11-02 21:16:08 +01001598 u64 addr = lu->command_block_agent_addr;
Stefan Richtercc078182006-07-23 22:12:00 +02001599 quadlet_t data[2];
1600 size_t length;
1601 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001602
Stefan Richter97d552e2006-12-29 23:47:04 +01001603 dma_sync_single_for_device(hi->host->device.parent,
1604 cmd->command_orb_dma,
Stefan Richter9b7d9c02006-11-22 21:44:34 +01001605 sizeof(struct sbp2_command_orb),
1606 DMA_TO_DEVICE);
Stefan Richter97d552e2006-12-29 23:47:04 +01001607 dma_sync_single_for_device(hi->host->device.parent, cmd->sge_dma,
Stefan Richter9b7d9c02006-11-22 21:44:34 +01001608 sizeof(cmd->scatter_gather_element),
Stefan Richter2446a792007-02-04 20:54:57 +01001609 DMA_TO_DEVICE);
Stefan Richtere8ca5662006-11-02 21:16:08 +01001610
1611 /* check to see if there are any previous orbs to use */
Stefan Richter138c8af2006-11-02 21:16:08 +01001612 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1613 last_orb = lu->last_orb;
1614 last_orb_dma = lu->last_orb_dma;
Stefan Richtercc078182006-07-23 22:12:00 +02001615 if (!last_orb) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001616 /*
Stefan Richtercc078182006-07-23 22:12:00 +02001617 * last_orb == NULL means: We know that the target's fetch agent
1618 * is not active right now.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001619 */
Stefan Richtercc078182006-07-23 22:12:00 +02001620 addr += SBP2_ORB_POINTER_OFFSET;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001621 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
Stefan Richter138c8af2006-11-02 21:16:08 +01001622 data[1] = cmd->command_orb_dma;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001623 sbp2util_cpu_to_be32_buffer(data, 8);
Stefan Richtercc078182006-07-23 22:12:00 +02001624 length = 8;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001625 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001626 /*
Stefan Richtercc078182006-07-23 22:12:00 +02001627 * last_orb != NULL means: We know that the target's fetch agent
1628 * is (very probably) not dead or in reset state right now.
1629 * We have an ORB already sent that we can append a new one to.
1630 * The target's fetch agent may or may not have read this
1631 * previous ORB yet.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001632 */
Stefan Richter97d552e2006-12-29 23:47:04 +01001633 dma_sync_single_for_cpu(hi->host->device.parent, last_orb_dma,
Stefan Richter9b7d9c02006-11-22 21:44:34 +01001634 sizeof(struct sbp2_command_orb),
1635 DMA_TO_DEVICE);
Stefan Richter138c8af2006-11-02 21:16:08 +01001636 last_orb->next_ORB_lo = cpu_to_be32(cmd->command_orb_dma);
Stefan Richtercc078182006-07-23 22:12:00 +02001637 wmb();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001638 /* Tells hardware that this pointer is valid */
Stefan Richtercc078182006-07-23 22:12:00 +02001639 last_orb->next_ORB_hi = 0;
Stefan Richter97d552e2006-12-29 23:47:04 +01001640 dma_sync_single_for_device(hi->host->device.parent,
1641 last_orb_dma,
Stefan Richter9b7d9c02006-11-22 21:44:34 +01001642 sizeof(struct sbp2_command_orb),
1643 DMA_TO_DEVICE);
Stefan Richtercc078182006-07-23 22:12:00 +02001644 addr += SBP2_DOORBELL_OFFSET;
1645 data[0] = 0;
1646 length = 4;
1647 }
Stefan Richter138c8af2006-11-02 21:16:08 +01001648 lu->last_orb = &cmd->command_orb;
1649 lu->last_orb_dma = cmd->command_orb_dma;
1650 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001651
Stefan Richter138c8af2006-11-02 21:16:08 +01001652 if (sbp2util_node_write_no_wait(lu->ne, addr, data, length)) {
Stefan Richter09ee67a2006-08-14 18:43:00 +02001653 /*
1654 * sbp2util_node_write_no_wait failed. We certainly ran out
1655 * of transaction labels, perhaps just because there were no
1656 * context switches which gave khpsbpkt a chance to collect
1657 * free tlabels. Try again in non-atomic context. If necessary,
1658 * the workqueue job will sleep to guaranteedly get a tlabel.
1659 * We do not accept new commands until the job is over.
1660 */
Stefan Richter138c8af2006-11-02 21:16:08 +01001661 scsi_block_requests(lu->shost);
1662 PREPARE_WORK(&lu->protocol_work,
Stefan Richter09ee67a2006-08-14 18:43:00 +02001663 last_orb ? sbp2util_write_doorbell:
Stefan Richterec9b7e12006-12-07 23:23:25 +01001664 sbp2util_write_orb_pointer);
Stefan Richter138c8af2006-11-02 21:16:08 +01001665 schedule_work(&lu->protocol_work);
Stefan Richter09ee67a2006-08-14 18:43:00 +02001666 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001667}
1668
Stefan Richter138c8af2006-11-02 21:16:08 +01001669static int sbp2_send_command(struct sbp2_lu *lu, struct scsi_cmnd *SCpnt,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001670 void (*done)(struct scsi_cmnd *))
1671{
Stefan Richter138c8af2006-11-02 21:16:08 +01001672 unchar *scsi_cmd = (unchar *)SCpnt->cmnd;
Stefan Richter138c8af2006-11-02 21:16:08 +01001673 struct sbp2_command_info *cmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001674
Stefan Richter138c8af2006-11-02 21:16:08 +01001675 cmd = sbp2util_allocate_command_orb(lu, SCpnt, done);
1676 if (!cmd)
Stefan Richtera237f352005-11-07 06:31:39 -05001677 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001678
FUJITA Tomonorid7dea2c2007-05-14 20:00:04 +09001679 sbp2_create_command_orb(lu, cmd, scsi_cmd, scsi_sg_count(SCpnt),
Stefan Richter825f1df2007-11-04 14:59:24 +01001680 scsi_bufflen(SCpnt), scsi_sglist(SCpnt),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001681 SCpnt->sc_data_direction);
Stefan Richter138c8af2006-11-02 21:16:08 +01001682 sbp2_link_orb_command(lu, cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001683
Stefan Richtera237f352005-11-07 06:31:39 -05001684 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001685}
1686
Linus Torvalds1da177e2005-04-16 15:20:36 -07001687/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001688 * Translates SBP-2 status into SCSI sense data for check conditions
1689 */
Stefan Richter138c8af2006-11-02 21:16:08 +01001690static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status,
1691 unchar *sense_data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001692{
Stefan Richtere8ca5662006-11-02 21:16:08 +01001693 /* OK, it's pretty ugly... ;-) */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001694 sense_data[0] = 0x70;
1695 sense_data[1] = 0x0;
1696 sense_data[2] = sbp2_status[9];
1697 sense_data[3] = sbp2_status[12];
1698 sense_data[4] = sbp2_status[13];
1699 sense_data[5] = sbp2_status[14];
1700 sense_data[6] = sbp2_status[15];
1701 sense_data[7] = 10;
1702 sense_data[8] = sbp2_status[16];
1703 sense_data[9] = sbp2_status[17];
1704 sense_data[10] = sbp2_status[18];
1705 sense_data[11] = sbp2_status[19];
1706 sense_data[12] = sbp2_status[10];
1707 sense_data[13] = sbp2_status[11];
1708 sense_data[14] = sbp2_status[20];
1709 sense_data[15] = sbp2_status[21];
1710
Stefan Richtere8ca5662006-11-02 21:16:08 +01001711 return sbp2_status[8] & 0x3f;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001712}
1713
Stefan Richter3e98eab42006-07-23 22:16:00 +02001714static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid,
1715 int destid, quadlet_t *data, u64 addr,
1716 size_t length, u16 fl)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001717{
Stefan Richterca0c7452006-11-02 21:16:08 +01001718 struct sbp2_fwhost_info *hi;
Stefan Richter138c8af2006-11-02 21:16:08 +01001719 struct sbp2_lu *lu = NULL, *lu_tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001720 struct scsi_cmnd *SCpnt = NULL;
Stefan Richter3e98eab42006-07-23 22:16:00 +02001721 struct sbp2_status_block *sb;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001722 u32 scsi_status = SBP2_SCSI_STATUS_GOOD;
Stefan Richter138c8af2006-11-02 21:16:08 +01001723 struct sbp2_command_info *cmd;
Jody McIntyre79456192005-11-07 06:29:39 -05001724 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001725
Stefan Richter60657722006-07-23 22:18:00 +02001726 if (unlikely(length < 8 || length > sizeof(struct sbp2_status_block))) {
1727 SBP2_ERR("Wrong size of status block");
1728 return RCODE_ADDRESS_ERROR;
1729 }
1730 if (unlikely(!host)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001731 SBP2_ERR("host is NULL - this is bad!");
Stefan Richtera237f352005-11-07 06:31:39 -05001732 return RCODE_ADDRESS_ERROR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001733 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001734 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
Stefan Richter60657722006-07-23 22:18:00 +02001735 if (unlikely(!hi)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001736 SBP2_ERR("host info is NULL - this is bad!");
Stefan Richtera237f352005-11-07 06:31:39 -05001737 return RCODE_ADDRESS_ERROR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001738 }
Stefan Richtere8ca5662006-11-02 21:16:08 +01001739
1740 /* Find the unit which wrote the status. */
Stefan Richter261b5f62007-08-11 11:52:08 +02001741 read_lock_irqsave(&sbp2_hi_logical_units_lock, flags);
Stefan Richter138c8af2006-11-02 21:16:08 +01001742 list_for_each_entry(lu_tmp, &hi->logical_units, lu_list) {
1743 if (lu_tmp->ne->nodeid == nodeid &&
1744 lu_tmp->status_fifo_addr == addr) {
1745 lu = lu_tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001746 break;
1747 }
1748 }
Stefan Richter261b5f62007-08-11 11:52:08 +02001749 read_unlock_irqrestore(&sbp2_hi_logical_units_lock, flags);
1750
Stefan Richter138c8af2006-11-02 21:16:08 +01001751 if (unlikely(!lu)) {
1752 SBP2_ERR("lu is NULL - device is gone?");
Stefan Richtera237f352005-11-07 06:31:39 -05001753 return RCODE_ADDRESS_ERROR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001754 }
1755
Stefan Richter138c8af2006-11-02 21:16:08 +01001756 /* Put response into lu status fifo buffer. The first two bytes
Stefan Richter3e98eab42006-07-23 22:16:00 +02001757 * come in big endian bit order. Often the target writes only a
1758 * truncated status block, minimally the first two quadlets. The rest
Stefan Richtere8ca5662006-11-02 21:16:08 +01001759 * is implied to be zeros. */
Stefan Richter138c8af2006-11-02 21:16:08 +01001760 sb = &lu->status_block;
Stefan Richter3e98eab42006-07-23 22:16:00 +02001761 memset(sb->command_set_dependent, 0, sizeof(sb->command_set_dependent));
1762 memcpy(sb, data, length);
1763 sbp2util_be32_to_cpu_buffer(sb, 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001764
Stefan Richtere8ca5662006-11-02 21:16:08 +01001765 /* Ignore unsolicited status. Handle command ORB status. */
Stefan Richter60657722006-07-23 22:18:00 +02001766 if (unlikely(STATUS_GET_SRC(sb->ORB_offset_hi_misc) == 2))
Stefan Richter138c8af2006-11-02 21:16:08 +01001767 cmd = NULL;
Stefan Richter60657722006-07-23 22:18:00 +02001768 else
Stefan Richter138c8af2006-11-02 21:16:08 +01001769 cmd = sbp2util_find_command_for_orb(lu, sb->ORB_offset_lo);
1770 if (cmd) {
Stefan Richter97d552e2006-12-29 23:47:04 +01001771 dma_sync_single_for_cpu(hi->host->device.parent,
1772 cmd->command_orb_dma,
Stefan Richter9b7d9c02006-11-22 21:44:34 +01001773 sizeof(struct sbp2_command_orb),
1774 DMA_TO_DEVICE);
Stefan Richter97d552e2006-12-29 23:47:04 +01001775 dma_sync_single_for_cpu(hi->host->device.parent, cmd->sge_dma,
Stefan Richter9b7d9c02006-11-22 21:44:34 +01001776 sizeof(cmd->scatter_gather_element),
Stefan Richter2446a792007-02-04 20:54:57 +01001777 DMA_TO_DEVICE);
Stefan Richtere8ca5662006-11-02 21:16:08 +01001778 /* Grab SCSI command pointers and check status. */
Stefan Richter60657722006-07-23 22:18:00 +02001779 /*
1780 * FIXME: If the src field in the status is 1, the ORB DMA must
1781 * not be reused until status for a subsequent ORB is received.
1782 */
Stefan Richter138c8af2006-11-02 21:16:08 +01001783 SCpnt = cmd->Current_SCpnt;
1784 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1785 sbp2util_mark_command_completed(lu, cmd);
1786 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001787
1788 if (SCpnt) {
Stefan Richterabbca102006-08-14 18:51:00 +02001789 u32 h = sb->ORB_offset_hi_misc;
1790 u32 r = STATUS_GET_RESP(h);
1791
1792 if (r != RESP_STATUS_REQUEST_COMPLETE) {
Stefan Richter35644092006-11-02 21:16:08 +01001793 SBP2_INFO("resp 0x%x, sbp_status 0x%x",
Stefan Richterabbca102006-08-14 18:51:00 +02001794 r, STATUS_GET_SBP_STATUS(h));
Stefan Richter60657722006-07-23 22:18:00 +02001795 scsi_status =
Stefan Richterabbca102006-08-14 18:51:00 +02001796 r == RESP_STATUS_TRANSPORT_FAILURE ?
1797 SBP2_SCSI_STATUS_BUSY :
Stefan Richter60657722006-07-23 22:18:00 +02001798 SBP2_SCSI_STATUS_COMMAND_TERMINATED;
Stefan Richterabbca102006-08-14 18:51:00 +02001799 }
Stefan Richtere8ca5662006-11-02 21:16:08 +01001800
Stefan Richteredf1fb22006-11-02 21:16:08 +01001801 if (STATUS_GET_LEN(h) > 1)
Stefan Richter3e98eab42006-07-23 22:16:00 +02001802 scsi_status = sbp2_status_to_sense_data(
1803 (unchar *)sb, SCpnt->sense_buffer);
Stefan Richtere8ca5662006-11-02 21:16:08 +01001804
Stefan Richteredf1fb22006-11-02 21:16:08 +01001805 if (STATUS_TEST_DEAD(h))
Stefan Richter138c8af2006-11-02 21:16:08 +01001806 sbp2_agent_reset(lu, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001807 }
1808
Stefan Richtere8ca5662006-11-02 21:16:08 +01001809 /* Check here to see if there are no commands in-use. If there
Stefan Richtercc078182006-07-23 22:12:00 +02001810 * are none, we know that the fetch agent left the active state
1811 * _and_ that we did not reactivate it yet. Therefore clear
1812 * last_orb so that next time we write directly to the
1813 * ORB_POINTER register. That way the fetch agent does not need
Stefan Richtere8ca5662006-11-02 21:16:08 +01001814 * to refetch the next_ORB. */
Stefan Richter138c8af2006-11-02 21:16:08 +01001815 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1816 if (list_empty(&lu->cmd_orb_inuse))
1817 lu->last_orb = NULL;
1818 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001819
1820 } else {
Stefan Richtere8ca5662006-11-02 21:16:08 +01001821 /* It's probably status after a management request. */
Stefan Richter138c8af2006-11-02 21:16:08 +01001822 if ((sb->ORB_offset_lo == lu->reconnect_orb_dma) ||
1823 (sb->ORB_offset_lo == lu->login_orb_dma) ||
1824 (sb->ORB_offset_lo == lu->query_logins_orb_dma) ||
1825 (sb->ORB_offset_lo == lu->logout_orb_dma)) {
1826 lu->access_complete = 1;
Stefan Richterca0c7452006-11-02 21:16:08 +01001827 wake_up_interruptible(&sbp2_access_wq);
Stefan Richtere8398bb2006-07-23 22:19:00 +02001828 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001829 }
1830
Stefan Richteredf1fb22006-11-02 21:16:08 +01001831 if (SCpnt)
Stefan Richter138c8af2006-11-02 21:16:08 +01001832 sbp2scsi_complete_command(lu, scsi_status, SCpnt,
1833 cmd->Current_done);
Stefan Richtera237f352005-11-07 06:31:39 -05001834 return RCODE_COMPLETE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001835}
1836
Linus Torvalds1da177e2005-04-16 15:20:36 -07001837/**************************************
1838 * SCSI interface related section
1839 **************************************/
1840
Linus Torvalds1da177e2005-04-16 15:20:36 -07001841static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt,
1842 void (*done)(struct scsi_cmnd *))
1843{
Stefan Richter138c8af2006-11-02 21:16:08 +01001844 struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0];
Stefan Richterca0c7452006-11-02 21:16:08 +01001845 struct sbp2_fwhost_info *hi;
Jody McIntyreabd559b2005-09-30 11:59:06 -07001846 int result = DID_NO_CONNECT << 16;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001847
Stefan Richter138c8af2006-11-02 21:16:08 +01001848 if (unlikely(!sbp2util_node_is_available(lu)))
Jody McIntyreabd559b2005-09-30 11:59:06 -07001849 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001850
Stefan Richter138c8af2006-11-02 21:16:08 +01001851 hi = lu->hi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001852
Stefan Richter5796aa72006-11-02 21:16:08 +01001853 if (unlikely(!hi)) {
Stefan Richterca0c7452006-11-02 21:16:08 +01001854 SBP2_ERR("sbp2_fwhost_info is NULL - this is bad!");
Jody McIntyreabd559b2005-09-30 11:59:06 -07001855 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001856 }
1857
Stefan Richtere8ca5662006-11-02 21:16:08 +01001858 /* Multiple units are currently represented to the SCSI core as separate
1859 * targets, not as one target with multiple LUs. Therefore return
1860 * selection time-out to any IO directed at non-zero LUNs. */
Stefan Richter5796aa72006-11-02 21:16:08 +01001861 if (unlikely(SCpnt->device->lun))
Jody McIntyreabd559b2005-09-30 11:59:06 -07001862 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001863
Stefan Richter138c8af2006-11-02 21:16:08 +01001864 if (unlikely(!hpsb_node_entry_valid(lu->ne))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001865 SBP2_ERR("Bus reset in progress - rejecting command");
Jody McIntyreabd559b2005-09-30 11:59:06 -07001866 result = DID_BUS_BUSY << 16;
1867 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001868 }
1869
Stefan Richtere8ca5662006-11-02 21:16:08 +01001870 /* Bidirectional commands are not yet implemented,
1871 * and unknown transfer direction not handled. */
Stefan Richter5796aa72006-11-02 21:16:08 +01001872 if (unlikely(SCpnt->sc_data_direction == DMA_BIDIRECTIONAL)) {
Stefan Richter43863eb2005-12-12 23:03:24 -05001873 SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command");
1874 result = DID_ERROR << 16;
1875 goto done;
1876 }
1877
Stefan Richter138c8af2006-11-02 21:16:08 +01001878 if (sbp2_send_command(lu, SCpnt, done)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001879 SBP2_ERR("Error sending SCSI command");
Stefan Richter138c8af2006-11-02 21:16:08 +01001880 sbp2scsi_complete_command(lu,
1881 SBP2_SCSI_STATUS_SELECTION_TIMEOUT,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001882 SCpnt, done);
1883 }
Jody McIntyreabd559b2005-09-30 11:59:06 -07001884 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001885
Jody McIntyreabd559b2005-09-30 11:59:06 -07001886done:
1887 SCpnt->result = result;
1888 done(SCpnt);
1889 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001890}
1891
Stefan Richter138c8af2006-11-02 21:16:08 +01001892static void sbp2scsi_complete_all_commands(struct sbp2_lu *lu, u32 status)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001893{
Stefan Richter138c8af2006-11-02 21:16:08 +01001894 struct sbp2_fwhost_info *hi = lu->hi;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001895 struct list_head *lh;
Stefan Richter138c8af2006-11-02 21:16:08 +01001896 struct sbp2_command_info *cmd;
Jody McIntyre79456192005-11-07 06:29:39 -05001897 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001898
Stefan Richter138c8af2006-11-02 21:16:08 +01001899 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
1900 while (!list_empty(&lu->cmd_orb_inuse)) {
1901 lh = lu->cmd_orb_inuse.next;
1902 cmd = list_entry(lh, struct sbp2_command_info, list);
Stefan Richter97d552e2006-12-29 23:47:04 +01001903 dma_sync_single_for_cpu(hi->host->device.parent,
1904 cmd->command_orb_dma,
Stefan Richter9b7d9c02006-11-22 21:44:34 +01001905 sizeof(struct sbp2_command_orb),
1906 DMA_TO_DEVICE);
Stefan Richter97d552e2006-12-29 23:47:04 +01001907 dma_sync_single_for_cpu(hi->host->device.parent, cmd->sge_dma,
Stefan Richter9b7d9c02006-11-22 21:44:34 +01001908 sizeof(cmd->scatter_gather_element),
Stefan Richter2446a792007-02-04 20:54:57 +01001909 DMA_TO_DEVICE);
Stefan Richter138c8af2006-11-02 21:16:08 +01001910 sbp2util_mark_command_completed(lu, cmd);
1911 if (cmd->Current_SCpnt) {
1912 cmd->Current_SCpnt->result = status << 16;
1913 cmd->Current_done(cmd->Current_SCpnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001914 }
1915 }
Stefan Richter138c8af2006-11-02 21:16:08 +01001916 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001917
1918 return;
1919}
1920
1921/*
Stefan Richtere8ca5662006-11-02 21:16:08 +01001922 * Complete a regular SCSI command. Can be called in atomic context.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001923 */
Stefan Richter138c8af2006-11-02 21:16:08 +01001924static void sbp2scsi_complete_command(struct sbp2_lu *lu, u32 scsi_status,
1925 struct scsi_cmnd *SCpnt,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001926 void (*done)(struct scsi_cmnd *))
1927{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001928 if (!SCpnt) {
1929 SBP2_ERR("SCpnt is NULL");
1930 return;
1931 }
1932
Linus Torvalds1da177e2005-04-16 15:20:36 -07001933 switch (scsi_status) {
Stefan Richtera237f352005-11-07 06:31:39 -05001934 case SBP2_SCSI_STATUS_GOOD:
Stefan Richter8f0525f2006-03-28 20:03:45 -05001935 SCpnt->result = DID_OK << 16;
Stefan Richtera237f352005-11-07 06:31:39 -05001936 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001937
Stefan Richtera237f352005-11-07 06:31:39 -05001938 case SBP2_SCSI_STATUS_BUSY:
1939 SBP2_ERR("SBP2_SCSI_STATUS_BUSY");
1940 SCpnt->result = DID_BUS_BUSY << 16;
1941 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001942
Stefan Richtera237f352005-11-07 06:31:39 -05001943 case SBP2_SCSI_STATUS_CHECK_CONDITION:
Stefan Richter8f0525f2006-03-28 20:03:45 -05001944 SCpnt->result = CHECK_CONDITION << 1 | DID_OK << 16;
Stefan Richtera237f352005-11-07 06:31:39 -05001945 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001946
Stefan Richtera237f352005-11-07 06:31:39 -05001947 case SBP2_SCSI_STATUS_SELECTION_TIMEOUT:
1948 SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT");
1949 SCpnt->result = DID_NO_CONNECT << 16;
1950 scsi_print_command(SCpnt);
1951 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001952
Stefan Richtera237f352005-11-07 06:31:39 -05001953 case SBP2_SCSI_STATUS_CONDITION_MET:
1954 case SBP2_SCSI_STATUS_RESERVATION_CONFLICT:
1955 case SBP2_SCSI_STATUS_COMMAND_TERMINATED:
1956 SBP2_ERR("Bad SCSI status = %x", scsi_status);
1957 SCpnt->result = DID_ERROR << 16;
1958 scsi_print_command(SCpnt);
1959 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001960
Stefan Richtera237f352005-11-07 06:31:39 -05001961 default:
1962 SBP2_ERR("Unsupported SCSI status = %x", scsi_status);
1963 SCpnt->result = DID_ERROR << 16;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001964 }
1965
Stefan Richtere8ca5662006-11-02 21:16:08 +01001966 /* If a bus reset is in progress and there was an error, complete
1967 * the command as busy so that it will get retried. */
Stefan Richter138c8af2006-11-02 21:16:08 +01001968 if (!hpsb_node_entry_valid(lu->ne)
Stefan Richtera237f352005-11-07 06:31:39 -05001969 && (scsi_status != SBP2_SCSI_STATUS_GOOD)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001970 SBP2_ERR("Completing command with busy (bus reset)");
1971 SCpnt->result = DID_BUS_BUSY << 16;
1972 }
1973
Stefan Richtere8ca5662006-11-02 21:16:08 +01001974 /* Tell the SCSI stack that we're done with this command. */
Stefan Richtera237f352005-11-07 06:31:39 -05001975 done(SCpnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001976}
1977
Jody McIntyreabd559b2005-09-30 11:59:06 -07001978static int sbp2scsi_slave_alloc(struct scsi_device *sdev)
1979{
Stefan Richter138c8af2006-11-02 21:16:08 +01001980 struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0];
Stefan Richtera80614d2006-02-14 22:04:19 -05001981
Stefan Richteref774c12008-02-17 14:57:10 +01001982 if (sdev->lun != 0 || sdev->id != lu->ud->id || sdev->channel != 0)
1983 return -ENODEV;
1984
Stefan Richter138c8af2006-11-02 21:16:08 +01001985 lu->sdev = sdev;
Stefan Richterc394f1e2006-08-07 20:48:00 +02001986 sdev->allow_restart = 1;
Stefan Richtera80614d2006-02-14 22:04:19 -05001987
Stefan Richtera4b47d62008-01-27 22:32:22 +01001988 /* SBP-2 requires quadlet alignment of the data buffers. */
1989 blk_queue_update_dma_alignment(sdev->request_queue, 4 - 1);
James Bottomley465ff312008-01-01 10:00:10 -06001990
Stefan Richter138c8af2006-11-02 21:16:08 +01001991 if (lu->workarounds & SBP2_WORKAROUND_INQUIRY_36)
Stefan Richtera80614d2006-02-14 22:04:19 -05001992 sdev->inquiry_len = 36;
Jody McIntyreabd559b2005-09-30 11:59:06 -07001993 return 0;
1994}
1995
Jody McIntyreabd559b2005-09-30 11:59:06 -07001996static int sbp2scsi_slave_configure(struct scsi_device *sdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001997{
Stefan Richter138c8af2006-11-02 21:16:08 +01001998 struct sbp2_lu *lu = (struct sbp2_lu *)sdev->host->hostdata[0];
Stefan Richter24d3bf82006-05-15 22:04:59 +02001999
Ben Collins365c7862005-11-07 06:31:24 -05002000 sdev->use_10_for_rw = 1;
Stefan Richter24d3bf82006-05-15 22:04:59 +02002001
Stefan Richter1a74bc62007-01-10 20:17:15 +01002002 if (sdev->type == TYPE_ROM)
2003 sdev->use_10_for_ms = 1;
Stefan Richter24d3bf82006-05-15 22:04:59 +02002004 if (sdev->type == TYPE_DISK &&
Stefan Richter138c8af2006-11-02 21:16:08 +01002005 lu->workarounds & SBP2_WORKAROUND_MODE_SENSE_8)
Stefan Richter24d3bf82006-05-15 22:04:59 +02002006 sdev->skip_ms_page_8 = 1;
Stefan Richter138c8af2006-11-02 21:16:08 +01002007 if (lu->workarounds & SBP2_WORKAROUND_FIX_CAPACITY)
Stefan Richtere9a1c522006-05-15 22:06:37 +02002008 sdev->fix_capacity = 1;
Stefan Richter4e6343a2007-12-16 17:31:26 +01002009 if (lu->workarounds & SBP2_WORKAROUND_128K_MAX_TRANS)
2010 blk_queue_max_sectors(sdev->request_queue, 128 * 1024 / 512);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002011 return 0;
2012}
2013
Jody McIntyreabd559b2005-09-30 11:59:06 -07002014static void sbp2scsi_slave_destroy(struct scsi_device *sdev)
2015{
Stefan Richter138c8af2006-11-02 21:16:08 +01002016 ((struct sbp2_lu *)sdev->host->hostdata[0])->sdev = NULL;
Jody McIntyreabd559b2005-09-30 11:59:06 -07002017 return;
2018}
2019
Linus Torvalds1da177e2005-04-16 15:20:36 -07002020/*
Stefan Richtere8ca5662006-11-02 21:16:08 +01002021 * Called by scsi stack when something has really gone wrong.
2022 * Usually called when a command has timed-out for some reason.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002023 */
2024static int sbp2scsi_abort(struct scsi_cmnd *SCpnt)
2025{
Stefan Richter138c8af2006-11-02 21:16:08 +01002026 struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0];
2027 struct sbp2_fwhost_info *hi = lu->hi;
2028 struct sbp2_command_info *cmd;
Stefan Richter24c7cd02006-04-01 21:11:41 +02002029 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002030
Stefan Richter35644092006-11-02 21:16:08 +01002031 SBP2_INFO("aborting sbp2 command");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002032 scsi_print_command(SCpnt);
2033
Stefan Richter138c8af2006-11-02 21:16:08 +01002034 if (sbp2util_node_is_available(lu)) {
2035 sbp2_agent_reset(lu, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002036
Stefan Richter23077f12006-09-11 20:17:14 +02002037 /* Return a matching command structure to the free pool. */
Stefan Richter138c8af2006-11-02 21:16:08 +01002038 spin_lock_irqsave(&lu->cmd_orb_lock, flags);
2039 cmd = sbp2util_find_command_for_SCpnt(lu, SCpnt);
2040 if (cmd) {
Stefan Richter97d552e2006-12-29 23:47:04 +01002041 dma_sync_single_for_cpu(hi->host->device.parent,
Stefan Richter138c8af2006-11-02 21:16:08 +01002042 cmd->command_orb_dma,
2043 sizeof(struct sbp2_command_orb),
Stefan Richter9b7d9c02006-11-22 21:44:34 +01002044 DMA_TO_DEVICE);
Stefan Richter97d552e2006-12-29 23:47:04 +01002045 dma_sync_single_for_cpu(hi->host->device.parent,
2046 cmd->sge_dma,
Stefan Richter138c8af2006-11-02 21:16:08 +01002047 sizeof(cmd->scatter_gather_element),
Stefan Richter2446a792007-02-04 20:54:57 +01002048 DMA_TO_DEVICE);
Stefan Richter138c8af2006-11-02 21:16:08 +01002049 sbp2util_mark_command_completed(lu, cmd);
2050 if (cmd->Current_SCpnt) {
2051 cmd->Current_SCpnt->result = DID_ABORT << 16;
2052 cmd->Current_done(cmd->Current_SCpnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002053 }
2054 }
Stefan Richter138c8af2006-11-02 21:16:08 +01002055 spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002056
Stefan Richter138c8af2006-11-02 21:16:08 +01002057 sbp2scsi_complete_all_commands(lu, DID_BUS_BUSY);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002058 }
2059
Stefan Richtera237f352005-11-07 06:31:39 -05002060 return SUCCESS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002061}
2062
2063/*
2064 * Called by scsi stack when something has really gone wrong.
2065 */
Jody McIntyreabd559b2005-09-30 11:59:06 -07002066static int sbp2scsi_reset(struct scsi_cmnd *SCpnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002067{
Stefan Richter138c8af2006-11-02 21:16:08 +01002068 struct sbp2_lu *lu = (struct sbp2_lu *)SCpnt->device->host->hostdata[0];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002069
Stefan Richter35644092006-11-02 21:16:08 +01002070 SBP2_INFO("reset requested");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002071
Stefan Richter138c8af2006-11-02 21:16:08 +01002072 if (sbp2util_node_is_available(lu)) {
Stefan Richter35644092006-11-02 21:16:08 +01002073 SBP2_INFO("generating sbp2 fetch agent reset");
Stefan Richter138c8af2006-11-02 21:16:08 +01002074 sbp2_agent_reset(lu, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002075 }
2076
Jody McIntyreabd559b2005-09-30 11:59:06 -07002077 return SUCCESS;
Jeff Garzik 94d0e7b82005-05-28 07:55:48 -04002078}
2079
Stefan Richtera237f352005-11-07 06:31:39 -05002080static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev,
2081 struct device_attribute *attr,
2082 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002083{
2084 struct scsi_device *sdev;
Stefan Richter138c8af2006-11-02 21:16:08 +01002085 struct sbp2_lu *lu;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002086
2087 if (!(sdev = to_scsi_device(dev)))
2088 return 0;
2089
Stefan Richter138c8af2006-11-02 21:16:08 +01002090 if (!(lu = (struct sbp2_lu *)sdev->host->hostdata[0]))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002091 return 0;
2092
Stefan Richterd7794c82007-05-27 13:17:15 +02002093 if (sbp2_long_sysfs_ieee1394_id)
2094 return sprintf(buf, "%016Lx:%06x:%04x\n",
2095 (unsigned long long)lu->ne->guid,
2096 lu->ud->directory_id, ORB_SET_LUN(lu->lun));
2097 else
2098 return sprintf(buf, "%016Lx:%d:%d\n",
2099 (unsigned long long)lu->ne->guid,
2100 lu->ud->id, ORB_SET_LUN(lu->lun));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002101}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002102
2103MODULE_AUTHOR("Ben Collins <bcollins@debian.org>");
2104MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver");
2105MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME);
2106MODULE_LICENSE("GPL");
2107
Linus Torvalds1da177e2005-04-16 15:20:36 -07002108static int sbp2_module_init(void)
2109{
2110 int ret;
2111
Stefan Richterca0c7452006-11-02 21:16:08 +01002112 if (sbp2_serialize_io) {
2113 sbp2_shost_template.can_queue = 1;
2114 sbp2_shost_template.cmd_per_lun = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002115 }
2116
Stefan Richterca0c7452006-11-02 21:16:08 +01002117 sbp2_shost_template.max_sectors = sbp2_max_sectors;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002118
Linus Torvalds1da177e2005-04-16 15:20:36 -07002119 hpsb_register_highlevel(&sbp2_highlevel);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002120 ret = hpsb_register_protocol(&sbp2_driver);
2121 if (ret) {
2122 SBP2_ERR("Failed to register protocol");
2123 hpsb_unregister_highlevel(&sbp2_highlevel);
2124 return ret;
2125 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002126 return 0;
2127}
2128
2129static void __exit sbp2_module_exit(void)
2130{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002131 hpsb_unregister_protocol(&sbp2_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002132 hpsb_unregister_highlevel(&sbp2_highlevel);
2133}
2134
2135module_init(sbp2_module_init);
2136module_exit(sbp2_module_exit);