blob: baa063c9e6e3e5b2b8b4296caa74d64caee03cbb [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * sbp2.c - SBP-2 protocol driver for IEEE-1394
3 *
4 * Copyright (C) 2000 James Goodwin, Filanet Corporation (www.filanet.com)
5 * jamesg@filanet.com (JSG)
6 *
7 * Copyright (C) 2003 Ben Collins <bcollins@debian.org>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software Foundation,
21 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 */
23
24/*
25 * Brief Description:
26 *
27 * This driver implements the Serial Bus Protocol 2 (SBP-2) over IEEE-1394
28 * under Linux. The SBP-2 driver is implemented as an IEEE-1394 high-level
29 * driver. It also registers as a SCSI lower-level driver in order to accept
30 * SCSI commands for transport using SBP-2.
31 *
32 * You may access any attached SBP-2 storage devices as if they were SCSI
33 * devices (e.g. mount /dev/sda1, fdisk, mkfs, etc.).
34 *
35 * Current Issues:
36 *
37 * - Error Handling: SCSI aborts and bus reset requests are handled somewhat
38 * but the code needs additional debugging.
39 */
40
Linus Torvalds1da177e2005-04-16 15:20:36 -070041#include <linux/kernel.h>
42#include <linux/list.h>
43#include <linux/string.h>
Stefan Richter24d3bf82006-05-15 22:04:59 +020044#include <linux/stringify.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#include <linux/slab.h>
46#include <linux/interrupt.h>
47#include <linux/fs.h>
48#include <linux/poll.h>
49#include <linux/module.h>
50#include <linux/moduleparam.h>
51#include <linux/types.h>
52#include <linux/delay.h>
53#include <linux/sched.h>
54#include <linux/blkdev.h>
55#include <linux/smp_lock.h>
56#include <linux/init.h>
57#include <linux/pci.h>
58
59#include <asm/current.h>
60#include <asm/uaccess.h>
61#include <asm/io.h>
62#include <asm/byteorder.h>
63#include <asm/atomic.h>
64#include <asm/system.h>
65#include <asm/scatterlist.h>
66
67#include <scsi/scsi.h>
68#include <scsi/scsi_cmnd.h>
69#include <scsi/scsi_dbg.h>
70#include <scsi/scsi_device.h>
71#include <scsi/scsi_host.h>
72
73#include "csr1212.h"
74#include "ieee1394.h"
75#include "ieee1394_types.h"
76#include "ieee1394_core.h"
77#include "nodemgr.h"
78#include "hosts.h"
79#include "highlevel.h"
80#include "ieee1394_transactions.h"
81#include "sbp2.h"
82
Linus Torvalds1da177e2005-04-16 15:20:36 -070083/*
84 * Module load parameter definitions
85 */
86
87/*
88 * Change max_speed on module load if you have a bad IEEE-1394
89 * controller that has trouble running 2KB packets at 400mb.
90 *
91 * NOTE: On certain OHCI parts I have seen short packets on async transmit
92 * (probably due to PCI latency/throughput issues with the part). You can
93 * bump down the speed if you are running into problems.
94 */
95static int max_speed = IEEE1394_SPEED_MAX;
96module_param(max_speed, int, 0644);
Jody McIntyre2bab3592005-09-30 11:59:07 -070097MODULE_PARM_DESC(max_speed, "Force max speed (3 = 800mb, 2 = 400mb, 1 = 200mb, 0 = 100mb)");
Linus Torvalds1da177e2005-04-16 15:20:36 -070098
99/*
100 * Set serialize_io to 1 if you'd like only one scsi command sent
101 * down to us at a time (debugging). This might be necessary for very
102 * badly behaved sbp2 devices.
Jody McIntyre2bab3592005-09-30 11:59:07 -0700103 *
104 * TODO: Make this configurable per device.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 */
Jody McIntyre2bab3592005-09-30 11:59:07 -0700106static int serialize_io = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107module_param(serialize_io, int, 0444);
Jody McIntyre2bab3592005-09-30 11:59:07 -0700108MODULE_PARM_DESC(serialize_io, "Serialize I/O coming from scsi drivers (default = 1, faster = 0)");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109
110/*
111 * Bump up max_sectors if you'd like to support very large sized
112 * transfers. Please note that some older sbp2 bridge chips are broken for
113 * transfers greater or equal to 128KB. Default is a value of 255
114 * sectors, or just under 128KB (at 512 byte sector size). I can note that
115 * the Oxsemi sbp2 chipsets have no problems supporting very large
116 * transfer sizes.
117 */
118static int max_sectors = SBP2_MAX_SECTORS;
119module_param(max_sectors, int, 0444);
Stefan Richter24d3bf82006-05-15 22:04:59 +0200120MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported (default = "
121 __stringify(SBP2_MAX_SECTORS) ")");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122
123/*
124 * Exclusive login to sbp2 device? In most cases, the sbp2 driver should
125 * do an exclusive login, as it's generally unsafe to have two hosts
126 * talking to a single sbp2 device at the same time (filesystem coherency,
127 * etc.). If you're running an sbp2 device that supports multiple logins,
128 * and you're either running read-only filesystems or some sort of special
Ben Collins20f45782006-06-12 18:13:11 -0400129 * filesystem supporting multiple hosts, e.g. OpenGFS, Oracle Cluster
130 * File System, or Lustre, then set exclusive_login to zero.
131 *
132 * So far only bridges from Oxford Semiconductor are known to support
133 * concurrent logins. Depending on firmware, four or two concurrent logins
134 * are possible on OXFW911 and newer Oxsemi bridges.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135 */
136static int exclusive_login = 1;
137module_param(exclusive_login, int, 0644);
138MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device (default = 1)");
139
140/*
Stefan Richter24d3bf82006-05-15 22:04:59 +0200141 * If any of the following workarounds is required for your device to work,
142 * please submit the kernel messages logged by sbp2 to the linux1394-devel
143 * mailing list.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 *
Stefan Richter24d3bf82006-05-15 22:04:59 +0200145 * - 128kB max transfer
146 * Limit transfer size. Necessary for some old bridges.
147 *
148 * - 36 byte inquiry
149 * When scsi_mod probes the device, let the inquiry command look like that
150 * from MS Windows.
151 *
152 * - skip mode page 8
153 * Suppress sending of mode_sense for mode page 8 if the device pretends to
154 * support the SCSI Primary Block commands instead of Reduced Block Commands.
Stefan Richtere9a1c522006-05-15 22:06:37 +0200155 *
156 * - fix capacity
157 * Tell sd_mod to correct the last sector number reported by read_capacity.
158 * Avoids access beyond actual disk limits on devices with an off-by-one bug.
159 * Don't use this with devices which don't have this bug.
Stefan Richter679c0cd2006-05-15 22:08:09 +0200160 *
161 * - override internal blacklist
162 * Instead of adding to the built-in blacklist, use only the workarounds
163 * specified in the module load parameter.
164 * Useful if a blacklist entry interfered with a non-broken device.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 */
Stefan Richter24d3bf82006-05-15 22:04:59 +0200166static int sbp2_default_workarounds;
167module_param_named(workarounds, sbp2_default_workarounds, int, 0644);
168MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0"
169 ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS)
170 ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36)
171 ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8)
Stefan Richtere9a1c522006-05-15 22:06:37 +0200172 ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY)
Stefan Richter679c0cd2006-05-15 22:08:09 +0200173 ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE)
Stefan Richter24d3bf82006-05-15 22:04:59 +0200174 ", or a combination)");
175
176/* legacy parameter */
Ben Collins1934b8b2005-07-09 20:01:23 -0400177static int force_inquiry_hack;
Stefan Richtera80614d2006-02-14 22:04:19 -0500178module_param(force_inquiry_hack, int, 0644);
Stefan Richter24d3bf82006-05-15 22:04:59 +0200179MODULE_PARM_DESC(force_inquiry_hack, "Deprecated, use 'workarounds'");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181/*
182 * Export information about protocols/devices supported by this driver.
183 */
184static struct ieee1394_device_id sbp2_id_table[] = {
185 {
Stefan Richtera237f352005-11-07 06:31:39 -0500186 .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
187 .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff,
188 .version = SBP2_SW_VERSION_ENTRY & 0xffffff},
189 {}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190};
191
192MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table);
193
194/*
195 * Debug levels, configured via kernel config, or enable here.
196 */
197
Olaf Hering44456d32005-07-27 11:45:17 -0700198#define CONFIG_IEEE1394_SBP2_DEBUG 0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199/* #define CONFIG_IEEE1394_SBP2_DEBUG_ORBS */
200/* #define CONFIG_IEEE1394_SBP2_DEBUG_DMA */
201/* #define CONFIG_IEEE1394_SBP2_DEBUG 1 */
202/* #define CONFIG_IEEE1394_SBP2_DEBUG 2 */
203/* #define CONFIG_IEEE1394_SBP2_PACKET_DUMP */
204
205#ifdef CONFIG_IEEE1394_SBP2_DEBUG_ORBS
206#define SBP2_ORB_DEBUG(fmt, args...) HPSB_ERR("sbp2(%s): "fmt, __FUNCTION__, ## args)
207static u32 global_outstanding_command_orbs = 0;
208#define outstanding_orb_incr global_outstanding_command_orbs++
209#define outstanding_orb_decr global_outstanding_command_orbs--
210#else
211#define SBP2_ORB_DEBUG(fmt, args...)
212#define outstanding_orb_incr
213#define outstanding_orb_decr
214#endif
215
216#ifdef CONFIG_IEEE1394_SBP2_DEBUG_DMA
217#define SBP2_DMA_ALLOC(fmt, args...) \
218 HPSB_ERR("sbp2(%s)alloc(%d): "fmt, __FUNCTION__, \
219 ++global_outstanding_dmas, ## args)
220#define SBP2_DMA_FREE(fmt, args...) \
221 HPSB_ERR("sbp2(%s)free(%d): "fmt, __FUNCTION__, \
222 --global_outstanding_dmas, ## args)
223static u32 global_outstanding_dmas = 0;
224#else
225#define SBP2_DMA_ALLOC(fmt, args...)
226#define SBP2_DMA_FREE(fmt, args...)
227#endif
228
229#if CONFIG_IEEE1394_SBP2_DEBUG >= 2
230#define SBP2_DEBUG(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
231#define SBP2_INFO(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
232#define SBP2_NOTICE(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
233#define SBP2_WARN(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
234#elif CONFIG_IEEE1394_SBP2_DEBUG == 1
235#define SBP2_DEBUG(fmt, args...) HPSB_DEBUG("sbp2: "fmt, ## args)
236#define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
237#define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args)
238#define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args)
239#else
240#define SBP2_DEBUG(fmt, args...)
241#define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
242#define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args)
243#define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args)
244#endif
245
246#define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
Stefan Richterd024ebc2006-03-28 20:03:55 -0500247#define SBP2_DEBUG_ENTER() SBP2_DEBUG("%s", __FUNCTION__)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249/*
250 * Globals
251 */
252
253static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id,
254 u32 status);
255
256static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id,
257 u32 scsi_status, struct scsi_cmnd *SCpnt,
258 void (*done)(struct scsi_cmnd *));
259
260static struct scsi_host_template scsi_driver_template;
261
262static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC };
263
264static void sbp2_host_reset(struct hpsb_host *host);
265
266static int sbp2_probe(struct device *dev);
267static int sbp2_remove(struct device *dev);
268static int sbp2_update(struct unit_directory *ud);
269
270static struct hpsb_highlevel sbp2_highlevel = {
271 .name = SBP2_DEVICE_NAME,
272 .host_reset = sbp2_host_reset,
273};
274
275static struct hpsb_address_ops sbp2_ops = {
276 .write = sbp2_handle_status_write
277};
278
279#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
280static struct hpsb_address_ops sbp2_physdma_ops = {
Stefan Richtera237f352005-11-07 06:31:39 -0500281 .read = sbp2_handle_physdma_read,
282 .write = sbp2_handle_physdma_write,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283};
284#endif
285
286static struct hpsb_protocol_driver sbp2_driver = {
287 .name = "SBP2 Driver",
288 .id_table = sbp2_id_table,
289 .update = sbp2_update,
290 .driver = {
291 .name = SBP2_DEVICE_NAME,
292 .bus = &ieee1394_bus_type,
293 .probe = sbp2_probe,
294 .remove = sbp2_remove,
295 },
296};
297
Stefan Richtera80614d2006-02-14 22:04:19 -0500298/*
Stefan Richter24d3bf82006-05-15 22:04:59 +0200299 * List of devices with known bugs.
300 *
301 * The firmware_revision field, masked with 0xffff00, is the best indicator
302 * for the type of bridge chip of a device. It yields a few false positives
303 * but this did not break correctly behaving devices so far.
Stefan Richtera80614d2006-02-14 22:04:19 -0500304 */
Stefan Richter24d3bf82006-05-15 22:04:59 +0200305static const struct {
306 u32 firmware_revision;
Stefan Richtere9a1c522006-05-15 22:06:37 +0200307 u32 model_id;
Stefan Richter24d3bf82006-05-15 22:04:59 +0200308 unsigned workarounds;
309} sbp2_workarounds_table[] = {
Ben Collins4b9a3342006-06-12 18:10:18 -0400310 /* DViCO Momobay CX-1 with TSB42AA9 bridge */ {
Stefan Richter24d3bf82006-05-15 22:04:59 +0200311 .firmware_revision = 0x002800,
Ben Collins4b9a3342006-06-12 18:10:18 -0400312 .model_id = 0x001010,
Stefan Richter24d3bf82006-05-15 22:04:59 +0200313 .workarounds = SBP2_WORKAROUND_INQUIRY_36 |
314 SBP2_WORKAROUND_MODE_SENSE_8,
315 },
316 /* Initio bridges, actually only needed for some older ones */ {
317 .firmware_revision = 0x000200,
318 .workarounds = SBP2_WORKAROUND_INQUIRY_36,
319 },
320 /* Symbios bridge */ {
321 .firmware_revision = 0xa0b800,
322 .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS,
Stefan Richtere9a1c522006-05-15 22:06:37 +0200323 },
324 /*
325 * Note about the following Apple iPod blacklist entries:
326 *
327 * There are iPods (2nd gen, 3rd gen) with model_id==0. Since our
328 * matching logic treats 0 as a wildcard, we cannot match this ID
329 * without rewriting the matching routine. Fortunately these iPods
330 * do not feature the read_capacity bug according to one report.
331 * Read_capacity behaviour as well as model_id could change due to
332 * Apple-supplied firmware updates though.
333 */
334 /* iPod 4th generation */ {
335 .firmware_revision = 0x0a2700,
336 .model_id = 0x000021,
337 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
338 },
339 /* iPod mini */ {
340 .firmware_revision = 0x0a2700,
341 .model_id = 0x000023,
342 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
343 },
344 /* iPod Photo */ {
345 .firmware_revision = 0x0a2700,
346 .model_id = 0x00007e,
347 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
Stefan Richter24d3bf82006-05-15 22:04:59 +0200348 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349};
350
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351/**************************************
352 * General utility functions
353 **************************************/
354
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355#ifndef __BIG_ENDIAN
356/*
357 * Converts a buffer from be32 to cpu byte ordering. Length is in bytes.
358 */
Stefan Richter2b01b802006-07-03 12:02:28 -0400359static inline void sbp2util_be32_to_cpu_buffer(void *buffer, int length)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360{
361 u32 *temp = buffer;
362
363 for (length = (length >> 2); length--; )
364 temp[length] = be32_to_cpu(temp[length]);
365
366 return;
367}
368
369/*
370 * Converts a buffer from cpu to be32 byte ordering. Length is in bytes.
371 */
Stefan Richter2b01b802006-07-03 12:02:28 -0400372static inline void sbp2util_cpu_to_be32_buffer(void *buffer, int length)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373{
374 u32 *temp = buffer;
375
376 for (length = (length >> 2); length--; )
377 temp[length] = cpu_to_be32(temp[length]);
378
379 return;
380}
381#else /* BIG_ENDIAN */
382/* Why waste the cpu cycles? */
383#define sbp2util_be32_to_cpu_buffer(x,y)
384#define sbp2util_cpu_to_be32_buffer(x,y)
385#endif
386
387#ifdef CONFIG_IEEE1394_SBP2_PACKET_DUMP
388/*
389 * Debug packet dump routine. Length is in bytes.
390 */
Stefan Richtera237f352005-11-07 06:31:39 -0500391static void sbp2util_packet_dump(void *buffer, int length, char *dump_name,
392 u32 dump_phys_addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393{
394 int i;
395 unsigned char *dump = buffer;
396
397 if (!dump || !length || !dump_name)
398 return;
399
400 if (dump_phys_addr)
401 printk("[%s, 0x%x]", dump_name, dump_phys_addr);
402 else
403 printk("[%s]", dump_name);
404 for (i = 0; i < length; i++) {
405 if (i > 0x3f) {
406 printk("\n ...");
407 break;
408 }
409 if ((i & 0x3) == 0)
410 printk(" ");
411 if ((i & 0xf) == 0)
412 printk("\n ");
Stefan Richtera237f352005-11-07 06:31:39 -0500413 printk("%02x ", (int)dump[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 }
415 printk("\n");
416
417 return;
418}
419#else
420#define sbp2util_packet_dump(w,x,y,z)
421#endif
422
423/*
424 * Goofy routine that basically does a down_timeout function.
425 */
426static int sbp2util_down_timeout(atomic_t *done, int timeout)
427{
428 int i;
429
430 for (i = timeout; (i > 0 && atomic_read(done) == 0); i-= HZ/10) {
431 if (msleep_interruptible(100)) /* 100ms */
Stefan Richtera237f352005-11-07 06:31:39 -0500432 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433 }
Stefan Richtera237f352005-11-07 06:31:39 -0500434 return (i > 0) ? 0 : 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435}
436
437/* Free's an allocated packet */
438static void sbp2_free_packet(struct hpsb_packet *packet)
439{
440 hpsb_free_tlabel(packet);
441 hpsb_free_packet(packet);
442}
443
444/* This is much like hpsb_node_write(), except it ignores the response
445 * subaction and returns immediately. Can be used from interrupts.
446 */
447static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr,
Stefan Richtera237f352005-11-07 06:31:39 -0500448 quadlet_t *buffer, size_t length)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449{
450 struct hpsb_packet *packet;
451
452 packet = hpsb_make_writepacket(ne->host, ne->nodeid,
453 addr, buffer, length);
Stefan Richtera237f352005-11-07 06:31:39 -0500454 if (!packet)
455 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456
Stefan Richtera237f352005-11-07 06:31:39 -0500457 hpsb_set_packet_complete_task(packet,
458 (void (*)(void *))sbp2_free_packet,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 packet);
460
461 hpsb_node_fill_packet(ne, packet);
462
Stefan Richtera237f352005-11-07 06:31:39 -0500463 if (hpsb_send_packet(packet) < 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 sbp2_free_packet(packet);
465 return -EIO;
466 }
467
468 return 0;
469}
470
471/*
472 * This function is called to create a pool of command orbs used for
473 * command processing. It is called when a new sbp2 device is detected.
474 */
475static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data *scsi_id)
476{
477 struct sbp2scsi_host_info *hi = scsi_id->hi;
478 int i;
479 unsigned long flags, orbs;
480 struct sbp2_command_info *command;
481
482 orbs = serialize_io ? 2 : SBP2_MAX_CMDS;
483
484 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
485 for (i = 0; i < orbs; i++) {
Stefan Richter85511582005-11-07 06:31:45 -0500486 command = kzalloc(sizeof(*command), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487 if (!command) {
Stefan Richtera237f352005-11-07 06:31:39 -0500488 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock,
489 flags);
490 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 command->command_orb_dma =
Stefan Richtera237f352005-11-07 06:31:39 -0500493 pci_map_single(hi->host->pdev, &command->command_orb,
494 sizeof(struct sbp2_command_orb),
495 PCI_DMA_BIDIRECTIONAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 SBP2_DMA_ALLOC("single command orb DMA");
497 command->sge_dma =
Stefan Richtera237f352005-11-07 06:31:39 -0500498 pci_map_single(hi->host->pdev,
499 &command->scatter_gather_element,
500 sizeof(command->scatter_gather_element),
501 PCI_DMA_BIDIRECTIONAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 SBP2_DMA_ALLOC("scatter_gather_element");
503 INIT_LIST_HEAD(&command->list);
504 list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed);
505 }
506 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
507 return 0;
508}
509
510/*
511 * This function is called to delete a pool of command orbs.
512 */
513static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data *scsi_id)
514{
515 struct hpsb_host *host = scsi_id->hi->host;
516 struct list_head *lh, *next;
517 struct sbp2_command_info *command;
518 unsigned long flags;
519
520 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
521 if (!list_empty(&scsi_id->sbp2_command_orb_completed)) {
522 list_for_each_safe(lh, next, &scsi_id->sbp2_command_orb_completed) {
523 command = list_entry(lh, struct sbp2_command_info, list);
524
525 /* Release our generic DMA's */
526 pci_unmap_single(host->pdev, command->command_orb_dma,
527 sizeof(struct sbp2_command_orb),
528 PCI_DMA_BIDIRECTIONAL);
529 SBP2_DMA_FREE("single command orb DMA");
530 pci_unmap_single(host->pdev, command->sge_dma,
531 sizeof(command->scatter_gather_element),
532 PCI_DMA_BIDIRECTIONAL);
533 SBP2_DMA_FREE("scatter_gather_element");
534
535 kfree(command);
536 }
537 }
538 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
539 return;
540}
541
542/*
543 * This function finds the sbp2_command for a given outstanding command
544 * orb.Only looks at the inuse list.
545 */
546static struct sbp2_command_info *sbp2util_find_command_for_orb(
547 struct scsi_id_instance_data *scsi_id, dma_addr_t orb)
548{
549 struct sbp2_command_info *command;
550 unsigned long flags;
551
552 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
553 if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) {
554 list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) {
555 if (command->command_orb_dma == orb) {
556 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
Stefan Richtera237f352005-11-07 06:31:39 -0500557 return command;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558 }
559 }
560 }
561 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
562
563 SBP2_ORB_DEBUG("could not match command orb %x", (unsigned int)orb);
564
Stefan Richtera237f352005-11-07 06:31:39 -0500565 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566}
567
568/*
569 * This function finds the sbp2_command for a given outstanding SCpnt.
570 * Only looks at the inuse list.
Stefan Richter24c7cd02006-04-01 21:11:41 +0200571 * Must be called with scsi_id->sbp2_command_orb_lock held.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 */
Stefan Richter24c7cd02006-04-01 21:11:41 +0200573static struct sbp2_command_info *sbp2util_find_command_for_SCpnt(
574 struct scsi_id_instance_data *scsi_id, void *SCpnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575{
576 struct sbp2_command_info *command;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577
Stefan Richter24c7cd02006-04-01 21:11:41 +0200578 if (!list_empty(&scsi_id->sbp2_command_orb_inuse))
579 list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list)
580 if (command->Current_SCpnt == SCpnt)
Stefan Richtera237f352005-11-07 06:31:39 -0500581 return command;
Stefan Richtera237f352005-11-07 06:31:39 -0500582 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583}
584
585/*
586 * This function allocates a command orb used to send a scsi command.
587 */
588static struct sbp2_command_info *sbp2util_allocate_command_orb(
589 struct scsi_id_instance_data *scsi_id,
590 struct scsi_cmnd *Current_SCpnt,
591 void (*Current_done)(struct scsi_cmnd *))
592{
593 struct list_head *lh;
594 struct sbp2_command_info *command = NULL;
595 unsigned long flags;
596
597 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
598 if (!list_empty(&scsi_id->sbp2_command_orb_completed)) {
599 lh = scsi_id->sbp2_command_orb_completed.next;
600 list_del(lh);
601 command = list_entry(lh, struct sbp2_command_info, list);
602 command->Current_done = Current_done;
603 command->Current_SCpnt = Current_SCpnt;
604 list_add_tail(&command->list, &scsi_id->sbp2_command_orb_inuse);
605 } else {
Stefan Richterd024ebc2006-03-28 20:03:55 -0500606 SBP2_ERR("%s: no orbs available", __FUNCTION__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607 }
608 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
Stefan Richtera237f352005-11-07 06:31:39 -0500609 return command;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610}
611
612/* Free our DMA's */
613static void sbp2util_free_command_dma(struct sbp2_command_info *command)
614{
615 struct scsi_id_instance_data *scsi_id =
616 (struct scsi_id_instance_data *)command->Current_SCpnt->device->host->hostdata[0];
617 struct hpsb_host *host;
618
619 if (!scsi_id) {
Stefan Richterd024ebc2006-03-28 20:03:55 -0500620 SBP2_ERR("%s: scsi_id == NULL", __FUNCTION__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621 return;
622 }
623
624 host = scsi_id->ud->ne->host;
625
626 if (command->cmd_dma) {
627 if (command->dma_type == CMD_DMA_SINGLE) {
628 pci_unmap_single(host->pdev, command->cmd_dma,
629 command->dma_size, command->dma_dir);
630 SBP2_DMA_FREE("single bulk");
631 } else if (command->dma_type == CMD_DMA_PAGE) {
632 pci_unmap_page(host->pdev, command->cmd_dma,
633 command->dma_size, command->dma_dir);
634 SBP2_DMA_FREE("single page");
635 } /* XXX: Check for CMD_DMA_NONE bug */
636 command->dma_type = CMD_DMA_NONE;
637 command->cmd_dma = 0;
638 }
639
640 if (command->sge_buffer) {
641 pci_unmap_sg(host->pdev, command->sge_buffer,
642 command->dma_size, command->dma_dir);
643 SBP2_DMA_FREE("scatter list");
644 command->sge_buffer = NULL;
645 }
646}
647
648/*
649 * This function moves a command to the completed orb list.
Stefan Richter24c7cd02006-04-01 21:11:41 +0200650 * Must be called with scsi_id->sbp2_command_orb_lock held.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 */
Stefan Richter24c7cd02006-04-01 21:11:41 +0200652static void sbp2util_mark_command_completed(
653 struct scsi_id_instance_data *scsi_id,
654 struct sbp2_command_info *command)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 list_del(&command->list);
657 sbp2util_free_command_dma(command);
658 list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659}
660
Jody McIntyreabd559b2005-09-30 11:59:06 -0700661/*
662 * Is scsi_id valid? Is the 1394 node still present?
663 */
664static inline int sbp2util_node_is_available(struct scsi_id_instance_data *scsi_id)
665{
666 return scsi_id && scsi_id->ne && !scsi_id->ne->in_limbo;
667}
668
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669/*********************************************
670 * IEEE-1394 core driver stack related section
671 *********************************************/
672static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud);
673
674static int sbp2_probe(struct device *dev)
675{
676 struct unit_directory *ud;
677 struct scsi_id_instance_data *scsi_id;
678
Stefan Richterd024ebc2006-03-28 20:03:55 -0500679 SBP2_DEBUG_ENTER();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680
681 ud = container_of(dev, struct unit_directory, device);
682
683 /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s)
684 * instead. */
685 if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY)
686 return -ENODEV;
687
Stefan Richtera237f352005-11-07 06:31:39 -0500688 scsi_id = sbp2_alloc_device(ud);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689
Stefan Richtera237f352005-11-07 06:31:39 -0500690 if (!scsi_id)
691 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692
Stefan Richtera237f352005-11-07 06:31:39 -0500693 sbp2_parse_unit_directory(scsi_id, ud);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694
Stefan Richtera237f352005-11-07 06:31:39 -0500695 return sbp2_start_device(scsi_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696}
697
698static int sbp2_remove(struct device *dev)
699{
700 struct unit_directory *ud;
701 struct scsi_id_instance_data *scsi_id;
Jody McIntyreabd559b2005-09-30 11:59:06 -0700702 struct scsi_device *sdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703
Stefan Richterd024ebc2006-03-28 20:03:55 -0500704 SBP2_DEBUG_ENTER();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705
706 ud = container_of(dev, struct unit_directory, device);
707 scsi_id = ud->device.driver_data;
Jody McIntyreabd559b2005-09-30 11:59:06 -0700708 if (!scsi_id)
709 return 0;
710
Stefan Richterbf637ec2006-01-31 00:13:06 -0500711 if (scsi_id->scsi_host) {
712 /* Get rid of enqueued commands if there is no chance to
713 * send them. */
714 if (!sbp2util_node_is_available(scsi_id))
715 sbp2scsi_complete_all_commands(scsi_id, DID_NO_CONNECT);
716 /* scsi_remove_device() will trigger shutdown functions of SCSI
717 * highlevel drivers which would deadlock if blocked. */
Jody McIntyreabd559b2005-09-30 11:59:06 -0700718 scsi_unblock_requests(scsi_id->scsi_host);
Stefan Richterbf637ec2006-01-31 00:13:06 -0500719 }
Jody McIntyreabd559b2005-09-30 11:59:06 -0700720 sdev = scsi_id->sdev;
721 if (sdev) {
722 scsi_id->sdev = NULL;
723 scsi_remove_device(sdev);
724 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725
726 sbp2_logout_device(scsi_id);
727 sbp2_remove_device(scsi_id);
728
729 return 0;
730}
731
732static int sbp2_update(struct unit_directory *ud)
733{
734 struct scsi_id_instance_data *scsi_id = ud->device.driver_data;
735
Stefan Richterd024ebc2006-03-28 20:03:55 -0500736 SBP2_DEBUG_ENTER();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737
738 if (sbp2_reconnect_device(scsi_id)) {
739
740 /*
741 * Ok, reconnect has failed. Perhaps we didn't
742 * reconnect fast enough. Try doing a regular login, but
743 * first do a logout just in case of any weirdness.
744 */
745 sbp2_logout_device(scsi_id);
746
747 if (sbp2_login_device(scsi_id)) {
748 /* Login failed too, just fail, and the backend
749 * will call our sbp2_remove for us */
750 SBP2_ERR("Failed to reconnect to sbp2 device!");
751 return -EBUSY;
752 }
753 }
754
755 /* Set max retries to something large on the device. */
756 sbp2_set_busy_timeout(scsi_id);
757
758 /* Do a SBP-2 fetch agent reset. */
759 sbp2_agent_reset(scsi_id, 1);
760
761 /* Get the max speed and packet size that we can use. */
762 sbp2_max_speed_and_size(scsi_id);
763
764 /* Complete any pending commands with busy (so they get
765 * retried) and remove them from our queue
766 */
767 sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY);
768
769 /* Make sure we unblock requests (since this is likely after a bus
770 * reset). */
771 scsi_unblock_requests(scsi_id->scsi_host);
772
773 return 0;
774}
775
776/* This functions is called by the sbp2_probe, for each new device. We now
777 * allocate one scsi host for each scsi_id (unit directory). */
778static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud)
779{
780 struct sbp2scsi_host_info *hi;
781 struct Scsi_Host *scsi_host = NULL;
782 struct scsi_id_instance_data *scsi_id = NULL;
783
Stefan Richterd024ebc2006-03-28 20:03:55 -0500784 SBP2_DEBUG_ENTER();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785
Stefan Richter85511582005-11-07 06:31:45 -0500786 scsi_id = kzalloc(sizeof(*scsi_id), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787 if (!scsi_id) {
788 SBP2_ERR("failed to create scsi_id");
789 goto failed_alloc;
790 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791
792 scsi_id->ne = ud->ne;
793 scsi_id->ud = ud;
794 scsi_id->speed_code = IEEE1394_SPEED_100;
795 scsi_id->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100];
Ben Collins67372312006-06-12 18:15:31 -0400796 scsi_id->status_fifo_addr = CSR1212_INVALID_ADDR_SPACE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797 atomic_set(&scsi_id->sbp2_login_complete, 0);
798 INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_inuse);
799 INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_completed);
800 INIT_LIST_HEAD(&scsi_id->scsi_list);
801 spin_lock_init(&scsi_id->sbp2_command_orb_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802
803 ud->device.driver_data = scsi_id;
804
805 hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host);
806 if (!hi) {
807 hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host, sizeof(*hi));
808 if (!hi) {
809 SBP2_ERR("failed to allocate hostinfo");
810 goto failed_alloc;
811 }
812 SBP2_DEBUG("sbp2_alloc_device: allocated hostinfo");
813 hi->host = ud->ne->host;
814 INIT_LIST_HEAD(&hi->scsi_ids);
815
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
817 /* Handle data movement if physical dma is not
Stefan Richter55664052006-03-28 19:59:42 -0500818 * enabled or not supported on host controller */
819 if (!hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host,
820 &sbp2_physdma_ops,
821 0x0ULL, 0xfffffffcULL)) {
822 SBP2_ERR("failed to register lower 4GB address range");
823 goto failed_alloc;
824 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825#endif
826 }
827
Stefan Richter147830f2006-03-28 19:54:52 -0500828 /* Prevent unloading of the 1394 host */
829 if (!try_module_get(hi->host->driver->owner)) {
830 SBP2_ERR("failed to get a reference on 1394 host driver");
831 goto failed_alloc;
832 }
833
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834 scsi_id->hi = hi;
835
836 list_add_tail(&scsi_id->scsi_list, &hi->scsi_ids);
837
Stefan Richter35bdddb2006-01-31 00:13:33 -0500838 /* Register the status FIFO address range. We could use the same FIFO
839 * for targets at different nodes. However we need different FIFOs per
Stefan Richtera54c9d32006-05-15 22:09:46 +0200840 * target in order to support multi-unit devices.
841 * The FIFO is located out of the local host controller's physical range
842 * but, if possible, within the posted write area. Status writes will
843 * then be performed as unified transactions. This slightly reduces
844 * bandwidth usage, and some Prolific based devices seem to require it.
845 */
Stefan Richter35bdddb2006-01-31 00:13:33 -0500846 scsi_id->status_fifo_addr = hpsb_allocate_and_register_addrspace(
847 &sbp2_highlevel, ud->ne->host, &sbp2_ops,
848 sizeof(struct sbp2_status_block), sizeof(quadlet_t),
Ben Collins40ae6c52006-06-12 18:13:49 -0400849 ud->ne->host->low_addr_space, CSR1212_ALL_SPACE_END);
Ben Collins67372312006-06-12 18:15:31 -0400850 if (scsi_id->status_fifo_addr == CSR1212_INVALID_ADDR_SPACE) {
Stefan Richter35bdddb2006-01-31 00:13:33 -0500851 SBP2_ERR("failed to allocate status FIFO address range");
852 goto failed_alloc;
853 }
854
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855 /* Register our host with the SCSI stack. */
Alexandre Olivaa2ef79e2005-06-15 22:26:31 -0700856 scsi_host = scsi_host_alloc(&scsi_driver_template,
Stefan Richtera237f352005-11-07 06:31:39 -0500857 sizeof(unsigned long));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858 if (!scsi_host) {
859 SBP2_ERR("failed to register scsi host");
860 goto failed_alloc;
861 }
862
863 scsi_host->hostdata[0] = (unsigned long)scsi_id;
864
865 if (!scsi_add_host(scsi_host, &ud->device)) {
866 scsi_id->scsi_host = scsi_host;
867 return scsi_id;
868 }
869
870 SBP2_ERR("failed to add scsi host");
871 scsi_host_put(scsi_host);
872
873failed_alloc:
874 sbp2_remove_device(scsi_id);
875 return NULL;
876}
877
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878static void sbp2_host_reset(struct hpsb_host *host)
879{
880 struct sbp2scsi_host_info *hi;
881 struct scsi_id_instance_data *scsi_id;
882
883 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
884
885 if (hi) {
886 list_for_each_entry(scsi_id, &hi->scsi_ids, scsi_list)
887 scsi_block_requests(scsi_id->scsi_host);
888 }
889}
890
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891/*
892 * This function is where we first pull the node unique ids, and then
893 * allocate memory and register a SBP-2 device.
894 */
895static int sbp2_start_device(struct scsi_id_instance_data *scsi_id)
896{
897 struct sbp2scsi_host_info *hi = scsi_id->hi;
James Bottomley146f7262005-09-10 12:44:09 -0500898 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899
Stefan Richterd024ebc2006-03-28 20:03:55 -0500900 SBP2_DEBUG_ENTER();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901
902 /* Login FIFO DMA */
903 scsi_id->login_response =
Stefan Richtera237f352005-11-07 06:31:39 -0500904 pci_alloc_consistent(hi->host->pdev,
905 sizeof(struct sbp2_login_response),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906 &scsi_id->login_response_dma);
907 if (!scsi_id->login_response)
908 goto alloc_fail;
909 SBP2_DMA_ALLOC("consistent DMA region for login FIFO");
910
911 /* Query logins ORB DMA */
912 scsi_id->query_logins_orb =
Stefan Richtera237f352005-11-07 06:31:39 -0500913 pci_alloc_consistent(hi->host->pdev,
914 sizeof(struct sbp2_query_logins_orb),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915 &scsi_id->query_logins_orb_dma);
916 if (!scsi_id->query_logins_orb)
917 goto alloc_fail;
918 SBP2_DMA_ALLOC("consistent DMA region for query logins ORB");
919
920 /* Query logins response DMA */
921 scsi_id->query_logins_response =
Stefan Richtera237f352005-11-07 06:31:39 -0500922 pci_alloc_consistent(hi->host->pdev,
923 sizeof(struct sbp2_query_logins_response),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924 &scsi_id->query_logins_response_dma);
925 if (!scsi_id->query_logins_response)
926 goto alloc_fail;
927 SBP2_DMA_ALLOC("consistent DMA region for query logins response");
928
929 /* Reconnect ORB DMA */
930 scsi_id->reconnect_orb =
Stefan Richtera237f352005-11-07 06:31:39 -0500931 pci_alloc_consistent(hi->host->pdev,
932 sizeof(struct sbp2_reconnect_orb),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933 &scsi_id->reconnect_orb_dma);
934 if (!scsi_id->reconnect_orb)
935 goto alloc_fail;
936 SBP2_DMA_ALLOC("consistent DMA region for reconnect ORB");
937
938 /* Logout ORB DMA */
939 scsi_id->logout_orb =
Stefan Richtera237f352005-11-07 06:31:39 -0500940 pci_alloc_consistent(hi->host->pdev,
941 sizeof(struct sbp2_logout_orb),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942 &scsi_id->logout_orb_dma);
943 if (!scsi_id->logout_orb)
944 goto alloc_fail;
945 SBP2_DMA_ALLOC("consistent DMA region for logout ORB");
946
947 /* Login ORB DMA */
948 scsi_id->login_orb =
Stefan Richtera237f352005-11-07 06:31:39 -0500949 pci_alloc_consistent(hi->host->pdev,
950 sizeof(struct sbp2_login_orb),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951 &scsi_id->login_orb_dma);
Stefan Richtereaceec72005-12-13 11:05:05 -0500952 if (!scsi_id->login_orb)
953 goto alloc_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954 SBP2_DMA_ALLOC("consistent DMA region for login ORB");
955
956 SBP2_DEBUG("New SBP-2 device inserted, SCSI ID = %x", scsi_id->ud->id);
957
958 /*
959 * Create our command orb pool
960 */
961 if (sbp2util_create_command_orb_pool(scsi_id)) {
962 SBP2_ERR("sbp2util_create_command_orb_pool failed!");
963 sbp2_remove_device(scsi_id);
964 return -ENOMEM;
965 }
966
967 /* Schedule a timeout here. The reason is that we may be so close
968 * to a bus reset, that the device is not available for logins.
969 * This can happen when the bus reset is caused by the host
970 * connected to the sbp2 device being removed. That host would
971 * have a certain amount of time to relogin before the sbp2 device
972 * allows someone else to login instead. One second makes sense. */
973 msleep_interruptible(1000);
974 if (signal_pending(current)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975 sbp2_remove_device(scsi_id);
976 return -EINTR;
977 }
Stefan Richtera237f352005-11-07 06:31:39 -0500978
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979 /*
980 * Login to the sbp-2 device
981 */
982 if (sbp2_login_device(scsi_id)) {
983 /* Login failed, just remove the device. */
984 sbp2_remove_device(scsi_id);
985 return -EBUSY;
986 }
987
988 /*
989 * Set max retries to something large on the device
990 */
991 sbp2_set_busy_timeout(scsi_id);
992
993 /*
994 * Do a SBP-2 fetch agent reset
995 */
996 sbp2_agent_reset(scsi_id, 1);
997
998 /*
999 * Get the max speed and packet size that we can use
1000 */
1001 sbp2_max_speed_and_size(scsi_id);
1002
1003 /* Add this device to the scsi layer now */
James Bottomley146f7262005-09-10 12:44:09 -05001004 error = scsi_add_device(scsi_id->scsi_host, 0, scsi_id->ud->id, 0);
1005 if (error) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006 SBP2_ERR("scsi_add_device failed");
Stefan Richterdc3edd52005-12-12 23:03:30 -05001007 sbp2_logout_device(scsi_id);
1008 sbp2_remove_device(scsi_id);
James Bottomley146f7262005-09-10 12:44:09 -05001009 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010 }
1011
1012 return 0;
Stefan Richtereaceec72005-12-13 11:05:05 -05001013
1014alloc_fail:
1015 SBP2_ERR("Could not allocate memory for scsi_id");
1016 sbp2_remove_device(scsi_id);
1017 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001018}
1019
1020/*
1021 * This function removes an sbp2 device from the sbp2scsi_host_info struct.
1022 */
1023static void sbp2_remove_device(struct scsi_id_instance_data *scsi_id)
1024{
1025 struct sbp2scsi_host_info *hi;
1026
Stefan Richterd024ebc2006-03-28 20:03:55 -05001027 SBP2_DEBUG_ENTER();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001028
1029 if (!scsi_id)
1030 return;
1031
1032 hi = scsi_id->hi;
1033
1034 /* This will remove our scsi device aswell */
1035 if (scsi_id->scsi_host) {
1036 scsi_remove_host(scsi_id->scsi_host);
1037 scsi_host_put(scsi_id->scsi_host);
1038 }
1039
1040 sbp2util_remove_command_orb_pool(scsi_id);
1041
1042 list_del(&scsi_id->scsi_list);
1043
1044 if (scsi_id->login_response) {
1045 pci_free_consistent(hi->host->pdev,
1046 sizeof(struct sbp2_login_response),
1047 scsi_id->login_response,
1048 scsi_id->login_response_dma);
1049 SBP2_DMA_FREE("single login FIFO");
1050 }
1051
1052 if (scsi_id->login_orb) {
1053 pci_free_consistent(hi->host->pdev,
1054 sizeof(struct sbp2_login_orb),
1055 scsi_id->login_orb,
1056 scsi_id->login_orb_dma);
1057 SBP2_DMA_FREE("single login ORB");
1058 }
1059
1060 if (scsi_id->reconnect_orb) {
1061 pci_free_consistent(hi->host->pdev,
1062 sizeof(struct sbp2_reconnect_orb),
1063 scsi_id->reconnect_orb,
1064 scsi_id->reconnect_orb_dma);
1065 SBP2_DMA_FREE("single reconnect orb");
1066 }
1067
1068 if (scsi_id->logout_orb) {
1069 pci_free_consistent(hi->host->pdev,
1070 sizeof(struct sbp2_logout_orb),
1071 scsi_id->logout_orb,
1072 scsi_id->logout_orb_dma);
1073 SBP2_DMA_FREE("single logout orb");
1074 }
1075
1076 if (scsi_id->query_logins_orb) {
1077 pci_free_consistent(hi->host->pdev,
1078 sizeof(struct sbp2_query_logins_orb),
1079 scsi_id->query_logins_orb,
1080 scsi_id->query_logins_orb_dma);
1081 SBP2_DMA_FREE("single query logins orb");
1082 }
1083
1084 if (scsi_id->query_logins_response) {
1085 pci_free_consistent(hi->host->pdev,
1086 sizeof(struct sbp2_query_logins_response),
1087 scsi_id->query_logins_response,
1088 scsi_id->query_logins_response_dma);
1089 SBP2_DMA_FREE("single query logins data");
1090 }
1091
Ben Collins67372312006-06-12 18:15:31 -04001092 if (scsi_id->status_fifo_addr != CSR1212_INVALID_ADDR_SPACE)
Stefan Richter35bdddb2006-01-31 00:13:33 -05001093 hpsb_unregister_addrspace(&sbp2_highlevel, hi->host,
Ben Collins67372312006-06-12 18:15:31 -04001094 scsi_id->status_fifo_addr);
Stefan Richter35bdddb2006-01-31 00:13:33 -05001095
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096 scsi_id->ud->device.driver_data = NULL;
1097
Stefan Richter147830f2006-03-28 19:54:52 -05001098 if (hi)
1099 module_put(hi->host->driver->owner);
1100
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101 SBP2_DEBUG("SBP-2 device removed, SCSI ID = %d", scsi_id->ud->id);
1102
1103 kfree(scsi_id);
1104}
1105
1106#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
1107/*
1108 * This function deals with physical dma write requests (for adapters that do not support
1109 * physical dma in hardware). Mostly just here for debugging...
1110 */
Stefan Richtera237f352005-11-07 06:31:39 -05001111static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid,
1112 int destid, quadlet_t *data, u64 addr,
1113 size_t length, u16 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001114{
1115
Stefan Richtera237f352005-11-07 06:31:39 -05001116 /*
1117 * Manually put the data in the right place.
1118 */
1119 memcpy(bus_to_virt((u32) addr), data, length);
1120 sbp2util_packet_dump(data, length, "sbp2 phys dma write by device",
1121 (u32) addr);
1122 return RCODE_COMPLETE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001123}
1124
1125/*
1126 * This function deals with physical dma read requests (for adapters that do not support
1127 * physical dma in hardware). Mostly just here for debugging...
1128 */
Stefan Richtera237f352005-11-07 06:31:39 -05001129static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid,
1130 quadlet_t *data, u64 addr, size_t length,
1131 u16 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132{
1133
Stefan Richtera237f352005-11-07 06:31:39 -05001134 /*
1135 * Grab data from memory and send a read response.
1136 */
1137 memcpy(data, bus_to_virt((u32) addr), length);
1138 sbp2util_packet_dump(data, length, "sbp2 phys dma read by device",
1139 (u32) addr);
1140 return RCODE_COMPLETE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001141}
1142#endif
1143
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144/**************************************
1145 * SBP-2 protocol related section
1146 **************************************/
1147
1148/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001149 * This function queries the device for the maximum concurrent logins it
1150 * supports.
1151 */
1152static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id)
1153{
1154 struct sbp2scsi_host_info *hi = scsi_id->hi;
1155 quadlet_t data[2];
1156 int max_logins;
1157 int active_logins;
1158
Stefan Richterd024ebc2006-03-28 20:03:55 -05001159 SBP2_DEBUG_ENTER();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160
1161 scsi_id->query_logins_orb->reserved1 = 0x0;
1162 scsi_id->query_logins_orb->reserved2 = 0x0;
1163
1164 scsi_id->query_logins_orb->query_response_lo = scsi_id->query_logins_response_dma;
1165 scsi_id->query_logins_orb->query_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166
1167 scsi_id->query_logins_orb->lun_misc = ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST);
1168 scsi_id->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1);
Ben Collinse309fc62005-11-07 06:31:34 -05001169 scsi_id->query_logins_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_lun);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001170
1171 scsi_id->query_logins_orb->reserved_resp_length =
1172 ORB_SET_QUERY_LOGINS_RESP_LENGTH(sizeof(struct sbp2_query_logins_response));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173
Stefan Richter35bdddb2006-01-31 00:13:33 -05001174 scsi_id->query_logins_orb->status_fifo_hi =
1175 ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
1176 scsi_id->query_logins_orb->status_fifo_lo =
1177 ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001178
1179 sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb));
1180
Linus Torvalds1da177e2005-04-16 15:20:36 -07001181 sbp2util_packet_dump(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb),
1182 "sbp2 query logins orb", scsi_id->query_logins_orb_dma);
1183
1184 memset(scsi_id->query_logins_response, 0, sizeof(struct sbp2_query_logins_response));
1185 memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
1186
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1188 data[1] = scsi_id->query_logins_orb_dma;
1189 sbp2util_cpu_to_be32_buffer(data, 8);
1190
1191 atomic_set(&scsi_id->sbp2_login_complete, 0);
1192
Linus Torvalds1da177e2005-04-16 15:20:36 -07001193 hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194
1195 if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 2*HZ)) {
1196 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
Stefan Richtera237f352005-11-07 06:31:39 -05001197 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001198 }
1199
1200 if (scsi_id->status_block.ORB_offset_lo != scsi_id->query_logins_orb_dma) {
1201 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
Stefan Richtera237f352005-11-07 06:31:39 -05001202 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203 }
1204
1205 if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
1206 STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
1207 STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
1208
1209 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
Stefan Richtera237f352005-11-07 06:31:39 -05001210 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001211 }
1212
1213 sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_response, sizeof(struct sbp2_query_logins_response));
1214
1215 SBP2_DEBUG("length_max_logins = %x",
1216 (unsigned int)scsi_id->query_logins_response->length_max_logins);
1217
Linus Torvalds1da177e2005-04-16 15:20:36 -07001218 max_logins = RESPONSE_GET_MAX_LOGINS(scsi_id->query_logins_response->length_max_logins);
Ben Collins20f45782006-06-12 18:13:11 -04001219 SBP2_INFO("Maximum concurrent logins supported: %d", max_logins);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220
1221 active_logins = RESPONSE_GET_ACTIVE_LOGINS(scsi_id->query_logins_response->length_max_logins);
Ben Collins20f45782006-06-12 18:13:11 -04001222 SBP2_INFO("Number of active logins: %d", active_logins);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223
1224 if (active_logins >= max_logins) {
Stefan Richtera237f352005-11-07 06:31:39 -05001225 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001226 }
1227
1228 return 0;
1229}
1230
1231/*
1232 * This function is called in order to login to a particular SBP-2 device,
1233 * after a bus reset.
1234 */
1235static int sbp2_login_device(struct scsi_id_instance_data *scsi_id)
1236{
1237 struct sbp2scsi_host_info *hi = scsi_id->hi;
1238 quadlet_t data[2];
1239
Stefan Richterd024ebc2006-03-28 20:03:55 -05001240 SBP2_DEBUG_ENTER();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241
1242 if (!scsi_id->login_orb) {
Stefan Richterd024ebc2006-03-28 20:03:55 -05001243 SBP2_DEBUG("%s: login_orb not alloc'd!", __FUNCTION__);
Stefan Richtera237f352005-11-07 06:31:39 -05001244 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245 }
1246
1247 if (!exclusive_login) {
1248 if (sbp2_query_logins(scsi_id)) {
1249 SBP2_INFO("Device does not support any more concurrent logins");
Stefan Richtera237f352005-11-07 06:31:39 -05001250 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001251 }
1252 }
1253
1254 /* Set-up login ORB, assume no password */
1255 scsi_id->login_orb->password_hi = 0;
1256 scsi_id->login_orb->password_lo = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001257
1258 scsi_id->login_orb->login_response_lo = scsi_id->login_response_dma;
1259 scsi_id->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260
1261 scsi_id->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST);
1262 scsi_id->login_orb->lun_misc |= ORB_SET_RECONNECT(0); /* One second reconnect time */
1263 scsi_id->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(exclusive_login); /* Exclusive access to device */
1264 scsi_id->login_orb->lun_misc |= ORB_SET_NOTIFY(1); /* Notify us of login complete */
Ben Collinse309fc62005-11-07 06:31:34 -05001265 scsi_id->login_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_lun);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266
1267 scsi_id->login_orb->passwd_resp_lengths =
1268 ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269
Stefan Richter35bdddb2006-01-31 00:13:33 -05001270 scsi_id->login_orb->status_fifo_hi =
1271 ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
1272 scsi_id->login_orb->status_fifo_lo =
1273 ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275 sbp2util_cpu_to_be32_buffer(scsi_id->login_orb, sizeof(struct sbp2_login_orb));
1276
Linus Torvalds1da177e2005-04-16 15:20:36 -07001277 sbp2util_packet_dump(scsi_id->login_orb, sizeof(struct sbp2_login_orb),
1278 "sbp2 login orb", scsi_id->login_orb_dma);
1279
Linus Torvalds1da177e2005-04-16 15:20:36 -07001280 memset(scsi_id->login_response, 0, sizeof(struct sbp2_login_response));
1281 memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
1282
Linus Torvalds1da177e2005-04-16 15:20:36 -07001283 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1284 data[1] = scsi_id->login_orb_dma;
1285 sbp2util_cpu_to_be32_buffer(data, 8);
1286
1287 atomic_set(&scsi_id->sbp2_login_complete, 0);
1288
Linus Torvalds1da177e2005-04-16 15:20:36 -07001289 hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290
1291 /*
1292 * Wait for login status (up to 20 seconds)...
1293 */
1294 if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 20*HZ)) {
1295 SBP2_ERR("Error logging into SBP-2 device - login timed-out");
Stefan Richtera237f352005-11-07 06:31:39 -05001296 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001297 }
1298
1299 /*
1300 * Sanity. Make sure status returned matches login orb.
1301 */
1302 if (scsi_id->status_block.ORB_offset_lo != scsi_id->login_orb_dma) {
1303 SBP2_ERR("Error logging into SBP-2 device - login timed-out");
Stefan Richtera237f352005-11-07 06:31:39 -05001304 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305 }
1306
1307 /*
1308 * Check status
1309 */
1310 if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
1311 STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
1312 STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
1313
1314 SBP2_ERR("Error logging into SBP-2 device - login failed");
Stefan Richtera237f352005-11-07 06:31:39 -05001315 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001316 }
1317
1318 /*
1319 * Byte swap the login response, for use when reconnecting or
1320 * logging out.
1321 */
1322 sbp2util_cpu_to_be32_buffer(scsi_id->login_response, sizeof(struct sbp2_login_response));
1323
1324 /*
1325 * Grab our command block agent address from the login response.
1326 */
1327 SBP2_DEBUG("command_block_agent_hi = %x",
1328 (unsigned int)scsi_id->login_response->command_block_agent_hi);
1329 SBP2_DEBUG("command_block_agent_lo = %x",
1330 (unsigned int)scsi_id->login_response->command_block_agent_lo);
1331
1332 scsi_id->sbp2_command_block_agent_addr =
1333 ((u64)scsi_id->login_response->command_block_agent_hi) << 32;
1334 scsi_id->sbp2_command_block_agent_addr |= ((u64)scsi_id->login_response->command_block_agent_lo);
1335 scsi_id->sbp2_command_block_agent_addr &= 0x0000ffffffffffffULL;
1336
1337 SBP2_INFO("Logged into SBP-2 device");
1338
Stefan Richtera237f352005-11-07 06:31:39 -05001339 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001340
1341}
1342
1343/*
1344 * This function is called in order to logout from a particular SBP-2
1345 * device, usually called during driver unload.
1346 */
1347static int sbp2_logout_device(struct scsi_id_instance_data *scsi_id)
1348{
1349 struct sbp2scsi_host_info *hi = scsi_id->hi;
1350 quadlet_t data[2];
1351 int error;
1352
Stefan Richterd024ebc2006-03-28 20:03:55 -05001353 SBP2_DEBUG_ENTER();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001354
1355 /*
1356 * Set-up logout ORB
1357 */
1358 scsi_id->logout_orb->reserved1 = 0x0;
1359 scsi_id->logout_orb->reserved2 = 0x0;
1360 scsi_id->logout_orb->reserved3 = 0x0;
1361 scsi_id->logout_orb->reserved4 = 0x0;
1362
1363 scsi_id->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST);
1364 scsi_id->logout_orb->login_ID_misc |= ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID);
1365
1366 /* Notify us when complete */
1367 scsi_id->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1368
1369 scsi_id->logout_orb->reserved5 = 0x0;
Stefan Richter35bdddb2006-01-31 00:13:33 -05001370 scsi_id->logout_orb->status_fifo_hi =
1371 ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
1372 scsi_id->logout_orb->status_fifo_lo =
1373 ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001374
1375 /*
1376 * Byte swap ORB if necessary
1377 */
1378 sbp2util_cpu_to_be32_buffer(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb));
1379
1380 sbp2util_packet_dump(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb),
1381 "sbp2 logout orb", scsi_id->logout_orb_dma);
1382
1383 /*
1384 * Ok, let's write to the target's management agent register
1385 */
1386 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1387 data[1] = scsi_id->logout_orb_dma;
1388 sbp2util_cpu_to_be32_buffer(data, 8);
1389
1390 atomic_set(&scsi_id->sbp2_login_complete, 0);
1391
1392 error = hpsb_node_write(scsi_id->ne,
Stefan Richtera237f352005-11-07 06:31:39 -05001393 scsi_id->sbp2_management_agent_addr, data, 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001394 if (error)
1395 return error;
1396
1397 /* Wait for device to logout...1 second. */
1398 if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ))
1399 return -EIO;
1400
1401 SBP2_INFO("Logged out of SBP-2 device");
1402
Stefan Richtera237f352005-11-07 06:31:39 -05001403 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001404
1405}
1406
1407/*
1408 * This function is called in order to reconnect to a particular SBP-2
1409 * device, after a bus reset.
1410 */
1411static int sbp2_reconnect_device(struct scsi_id_instance_data *scsi_id)
1412{
1413 struct sbp2scsi_host_info *hi = scsi_id->hi;
1414 quadlet_t data[2];
1415 int error;
1416
Stefan Richterd024ebc2006-03-28 20:03:55 -05001417 SBP2_DEBUG_ENTER();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001418
1419 /*
1420 * Set-up reconnect ORB
1421 */
1422 scsi_id->reconnect_orb->reserved1 = 0x0;
1423 scsi_id->reconnect_orb->reserved2 = 0x0;
1424 scsi_id->reconnect_orb->reserved3 = 0x0;
1425 scsi_id->reconnect_orb->reserved4 = 0x0;
1426
1427 scsi_id->reconnect_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST);
1428 scsi_id->reconnect_orb->login_ID_misc |=
1429 ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID);
1430
1431 /* Notify us when complete */
1432 scsi_id->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1433
1434 scsi_id->reconnect_orb->reserved5 = 0x0;
Stefan Richter35bdddb2006-01-31 00:13:33 -05001435 scsi_id->reconnect_orb->status_fifo_hi =
1436 ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
1437 scsi_id->reconnect_orb->status_fifo_lo =
1438 ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001439
1440 /*
1441 * Byte swap ORB if necessary
1442 */
1443 sbp2util_cpu_to_be32_buffer(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb));
1444
1445 sbp2util_packet_dump(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb),
1446 "sbp2 reconnect orb", scsi_id->reconnect_orb_dma);
1447
1448 /*
1449 * Initialize status fifo
1450 */
1451 memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
1452
1453 /*
1454 * Ok, let's write to the target's management agent register
1455 */
1456 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1457 data[1] = scsi_id->reconnect_orb_dma;
1458 sbp2util_cpu_to_be32_buffer(data, 8);
1459
1460 atomic_set(&scsi_id->sbp2_login_complete, 0);
1461
1462 error = hpsb_node_write(scsi_id->ne,
Stefan Richtera237f352005-11-07 06:31:39 -05001463 scsi_id->sbp2_management_agent_addr, data, 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001464 if (error)
1465 return error;
1466
1467 /*
1468 * Wait for reconnect status (up to 1 second)...
1469 */
1470 if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ)) {
1471 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out");
Stefan Richtera237f352005-11-07 06:31:39 -05001472 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001473 }
1474
1475 /*
1476 * Sanity. Make sure status returned matches reconnect orb.
1477 */
1478 if (scsi_id->status_block.ORB_offset_lo != scsi_id->reconnect_orb_dma) {
1479 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out");
Stefan Richtera237f352005-11-07 06:31:39 -05001480 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001481 }
1482
1483 /*
1484 * Check status
1485 */
1486 if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
1487 STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
1488 STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
1489
1490 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect failed");
Stefan Richtera237f352005-11-07 06:31:39 -05001491 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001492 }
1493
1494 HPSB_DEBUG("Reconnected to SBP-2 device");
1495
Stefan Richtera237f352005-11-07 06:31:39 -05001496 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001497
1498}
1499
1500/*
1501 * This function is called in order to set the busy timeout (number of
1502 * retries to attempt) on the sbp2 device.
1503 */
1504static int sbp2_set_busy_timeout(struct scsi_id_instance_data *scsi_id)
1505{
1506 quadlet_t data;
1507
Stefan Richterd024ebc2006-03-28 20:03:55 -05001508 SBP2_DEBUG_ENTER();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001509
Linus Torvalds1da177e2005-04-16 15:20:36 -07001510 data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE);
Stefan Richterd024ebc2006-03-28 20:03:55 -05001511 if (hpsb_node_write(scsi_id->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4))
1512 SBP2_ERR("%s error", __FUNCTION__);
Stefan Richtera237f352005-11-07 06:31:39 -05001513 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001514}
1515
Linus Torvalds1da177e2005-04-16 15:20:36 -07001516/*
1517 * This function is called to parse sbp2 device's config rom unit
1518 * directory. Used to determine things like sbp2 management agent offset,
1519 * and command set used (SCSI or RBC).
1520 */
1521static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id,
1522 struct unit_directory *ud)
1523{
1524 struct csr1212_keyval *kv;
1525 struct csr1212_dentry *dentry;
1526 u64 management_agent_addr;
1527 u32 command_set_spec_id, command_set, unit_characteristics,
Stefan Richter24d3bf82006-05-15 22:04:59 +02001528 firmware_revision;
1529 unsigned workarounds;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001530 int i;
1531
Stefan Richterd024ebc2006-03-28 20:03:55 -05001532 SBP2_DEBUG_ENTER();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001533
1534 management_agent_addr = 0x0;
1535 command_set_spec_id = 0x0;
1536 command_set = 0x0;
1537 unit_characteristics = 0x0;
1538 firmware_revision = 0x0;
1539
1540 /* Handle different fields in the unit directory, based on keys */
1541 csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) {
1542 switch (kv->key.id) {
1543 case CSR1212_KV_ID_DEPENDENT_INFO:
1544 if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET) {
1545 /* Save off the management agent address */
1546 management_agent_addr =
Stefan Richtera237f352005-11-07 06:31:39 -05001547 CSR1212_REGISTER_SPACE_BASE +
1548 (kv->value.csr_offset << 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001549
1550 SBP2_DEBUG("sbp2_management_agent_addr = %x",
Stefan Richtera237f352005-11-07 06:31:39 -05001551 (unsigned int)management_agent_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001552 } else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
Stefan Richtera237f352005-11-07 06:31:39 -05001553 scsi_id->sbp2_lun =
1554 ORB_SET_LUN(kv->value.immediate);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001555 }
1556 break;
1557
1558 case SBP2_COMMAND_SET_SPEC_ID_KEY:
1559 /* Command spec organization */
1560 command_set_spec_id = kv->value.immediate;
1561 SBP2_DEBUG("sbp2_command_set_spec_id = %x",
Stefan Richtera237f352005-11-07 06:31:39 -05001562 (unsigned int)command_set_spec_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001563 break;
1564
1565 case SBP2_COMMAND_SET_KEY:
1566 /* Command set used by sbp2 device */
1567 command_set = kv->value.immediate;
1568 SBP2_DEBUG("sbp2_command_set = %x",
Stefan Richtera237f352005-11-07 06:31:39 -05001569 (unsigned int)command_set);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001570 break;
1571
1572 case SBP2_UNIT_CHARACTERISTICS_KEY:
1573 /*
1574 * Unit characterisitcs (orb related stuff
1575 * that I'm not yet paying attention to)
1576 */
1577 unit_characteristics = kv->value.immediate;
1578 SBP2_DEBUG("sbp2_unit_characteristics = %x",
Stefan Richtera237f352005-11-07 06:31:39 -05001579 (unsigned int)unit_characteristics);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001580 break;
1581
1582 case SBP2_FIRMWARE_REVISION_KEY:
1583 /* Firmware revision */
1584 firmware_revision = kv->value.immediate;
Stefan Richter24d3bf82006-05-15 22:04:59 +02001585 SBP2_DEBUG("sbp2_firmware_revision = %x",
1586 (unsigned int)firmware_revision);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001587 break;
1588
1589 default:
1590 break;
1591 }
1592 }
1593
Stefan Richter24d3bf82006-05-15 22:04:59 +02001594 workarounds = sbp2_default_workarounds;
1595 if (force_inquiry_hack) {
1596 SBP2_WARN("force_inquiry_hack is deprecated. "
1597 "Use parameter 'workarounds' instead.");
1598 workarounds |= SBP2_WORKAROUND_INQUIRY_36;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001599 }
1600
Stefan Richter679c0cd2006-05-15 22:08:09 +02001601 if (!(workarounds & SBP2_WORKAROUND_OVERRIDE))
1602 for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) {
1603 if (sbp2_workarounds_table[i].firmware_revision &&
1604 sbp2_workarounds_table[i].firmware_revision !=
1605 (firmware_revision & 0xffff00))
1606 continue;
1607 if (sbp2_workarounds_table[i].model_id &&
1608 sbp2_workarounds_table[i].model_id != ud->model_id)
1609 continue;
1610 workarounds |= sbp2_workarounds_table[i].workarounds;
1611 break;
1612 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001613
Stefan Richter24d3bf82006-05-15 22:04:59 +02001614 if (workarounds)
Stefan Richtere9a1c522006-05-15 22:06:37 +02001615 SBP2_INFO("Workarounds for node " NODE_BUS_FMT ": 0x%x "
1616 "(firmware_revision 0x%06x, vendor_id 0x%06x,"
1617 " model_id 0x%06x)",
Stefan Richter24d3bf82006-05-15 22:04:59 +02001618 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid),
Stefan Richtere9a1c522006-05-15 22:06:37 +02001619 workarounds, firmware_revision,
1620 ud->vendor_id ? ud->vendor_id : ud->ne->vendor_id,
1621 ud->model_id);
Stefan Richter24d3bf82006-05-15 22:04:59 +02001622
1623 /* We would need one SCSI host template for each target to adjust
1624 * max_sectors on the fly, therefore warn only. */
1625 if (workarounds & SBP2_WORKAROUND_128K_MAX_TRANS &&
1626 (max_sectors * 512) > (128 * 1024))
1627 SBP2_WARN("Node " NODE_BUS_FMT ": Bridge only supports 128KB "
1628 "max transfer size. WARNING: Current max_sectors "
1629 "setting is larger than 128KB (%d sectors)",
1630 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid),
1631 max_sectors);
1632
Linus Torvalds1da177e2005-04-16 15:20:36 -07001633 /* If this is a logical unit directory entry, process the parent
1634 * to get the values. */
1635 if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) {
1636 struct unit_directory *parent_ud =
1637 container_of(ud->device.parent, struct unit_directory, device);
1638 sbp2_parse_unit_directory(scsi_id, parent_ud);
1639 } else {
1640 scsi_id->sbp2_management_agent_addr = management_agent_addr;
1641 scsi_id->sbp2_command_set_spec_id = command_set_spec_id;
1642 scsi_id->sbp2_command_set = command_set;
1643 scsi_id->sbp2_unit_characteristics = unit_characteristics;
1644 scsi_id->sbp2_firmware_revision = firmware_revision;
1645 scsi_id->workarounds = workarounds;
1646 if (ud->flags & UNIT_DIRECTORY_HAS_LUN)
Ben Collinse309fc62005-11-07 06:31:34 -05001647 scsi_id->sbp2_lun = ORB_SET_LUN(ud->lun);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001648 }
1649}
1650
Ben Collinsfd23ade2006-06-12 18:14:14 -04001651#define SBP2_PAYLOAD_TO_BYTES(p) (1 << ((p) + 2))
1652
Linus Torvalds1da177e2005-04-16 15:20:36 -07001653/*
1654 * This function is called in order to determine the max speed and packet
1655 * size we can use in our ORBs. Note, that we (the driver and host) only
1656 * initiate the transaction. The SBP-2 device actually transfers the data
1657 * (by reading from the DMA area we tell it). This means that the SBP-2
1658 * device decides the actual maximum data it can transfer. We just tell it
1659 * the speed that it needs to use, and the max_rec the host supports, and
1660 * it takes care of the rest.
1661 */
1662static int sbp2_max_speed_and_size(struct scsi_id_instance_data *scsi_id)
1663{
1664 struct sbp2scsi_host_info *hi = scsi_id->hi;
Ben Collinsfd23ade2006-06-12 18:14:14 -04001665 u8 payload;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001666
Stefan Richterd024ebc2006-03-28 20:03:55 -05001667 SBP2_DEBUG_ENTER();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001668
Stefan Richtera237f352005-11-07 06:31:39 -05001669 scsi_id->speed_code =
Ben Collins647dcb52006-06-12 18:12:37 -04001670 hi->host->speed[NODEID_TO_NODE(scsi_id->ne->nodeid)];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001671
1672 /* Bump down our speed if the user requested it */
1673 if (scsi_id->speed_code > max_speed) {
1674 scsi_id->speed_code = max_speed;
1675 SBP2_ERR("Forcing SBP-2 max speed down to %s",
1676 hpsb_speedto_str[scsi_id->speed_code]);
1677 }
1678
1679 /* Payload size is the lesser of what our speed supports and what
1680 * our host supports. */
Ben Collinsfd23ade2006-06-12 18:14:14 -04001681 payload = min(sbp2_speedto_max_payload[scsi_id->speed_code],
1682 (u8) (hi->host->csr.max_rec - 1));
1683
1684 /* If physical DMA is off, work around limitation in ohci1394:
1685 * packet size must not exceed PAGE_SIZE */
1686 if (scsi_id->ne->host->low_addr_space < (1ULL << 32))
1687 while (SBP2_PAYLOAD_TO_BYTES(payload) + 24 > PAGE_SIZE &&
1688 payload)
1689 payload--;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001690
1691 HPSB_DEBUG("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]",
1692 NODE_BUS_ARGS(hi->host, scsi_id->ne->nodeid),
1693 hpsb_speedto_str[scsi_id->speed_code],
Ben Collinsfd23ade2006-06-12 18:14:14 -04001694 SBP2_PAYLOAD_TO_BYTES(payload));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001695
Ben Collinsfd23ade2006-06-12 18:14:14 -04001696 scsi_id->max_payload_size = payload;
Stefan Richtera237f352005-11-07 06:31:39 -05001697 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001698}
1699
1700/*
1701 * This function is called in order to perform a SBP-2 agent reset.
1702 */
1703static int sbp2_agent_reset(struct scsi_id_instance_data *scsi_id, int wait)
1704{
1705 quadlet_t data;
1706 u64 addr;
1707 int retval;
1708
Stefan Richterd024ebc2006-03-28 20:03:55 -05001709 SBP2_DEBUG_ENTER();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001710
Linus Torvalds1da177e2005-04-16 15:20:36 -07001711 data = ntohl(SBP2_AGENT_RESET_DATA);
1712 addr = scsi_id->sbp2_command_block_agent_addr + SBP2_AGENT_RESET_OFFSET;
1713
1714 if (wait)
1715 retval = hpsb_node_write(scsi_id->ne, addr, &data, 4);
1716 else
1717 retval = sbp2util_node_write_no_wait(scsi_id->ne, addr, &data, 4);
1718
1719 if (retval < 0) {
1720 SBP2_ERR("hpsb_node_write failed.\n");
1721 return -EIO;
1722 }
1723
1724 /*
1725 * Need to make sure orb pointer is written on next command
1726 */
1727 scsi_id->last_orb = NULL;
1728
Stefan Richtera237f352005-11-07 06:31:39 -05001729 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001730}
1731
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001732static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb,
1733 struct sbp2scsi_host_info *hi,
1734 struct sbp2_command_info *command,
1735 unsigned int scsi_use_sg,
1736 struct scatterlist *sgpnt,
1737 u32 orb_direction,
1738 enum dma_data_direction dma_dir)
1739{
1740 command->dma_dir = dma_dir;
1741 orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1742 orb->misc |= ORB_SET_DIRECTION(orb_direction);
1743
1744 /* Special case if only one element (and less than 64KB in size) */
1745 if ((scsi_use_sg == 1) &&
1746 (sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) {
1747
1748 SBP2_DEBUG("Only one s/g element");
1749 command->dma_size = sgpnt[0].length;
1750 command->dma_type = CMD_DMA_PAGE;
1751 command->cmd_dma = pci_map_page(hi->host->pdev,
1752 sgpnt[0].page,
1753 sgpnt[0].offset,
1754 command->dma_size,
1755 command->dma_dir);
1756 SBP2_DMA_ALLOC("single page scatter element");
1757
1758 orb->data_descriptor_lo = command->cmd_dma;
1759 orb->misc |= ORB_SET_DATA_SIZE(command->dma_size);
1760
1761 } else {
1762 struct sbp2_unrestricted_page_table *sg_element =
1763 &command->scatter_gather_element[0];
1764 u32 sg_count, sg_len;
1765 dma_addr_t sg_addr;
1766 int i, count = pci_map_sg(hi->host->pdev, sgpnt, scsi_use_sg,
1767 dma_dir);
1768
1769 SBP2_DMA_ALLOC("scatter list");
1770
1771 command->dma_size = scsi_use_sg;
1772 command->sge_buffer = sgpnt;
1773
1774 /* use page tables (s/g) */
1775 orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1776 orb->data_descriptor_lo = command->sge_dma;
1777
1778 /*
1779 * Loop through and fill out our sbp-2 page tables
1780 * (and split up anything too large)
1781 */
1782 for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) {
1783 sg_len = sg_dma_len(sgpnt);
1784 sg_addr = sg_dma_address(sgpnt);
1785 while (sg_len) {
1786 sg_element[sg_count].segment_base_lo = sg_addr;
1787 if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
1788 sg_element[sg_count].length_segment_base_hi =
1789 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
1790 sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
1791 sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
1792 } else {
1793 sg_element[sg_count].length_segment_base_hi =
1794 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
1795 sg_len = 0;
1796 }
1797 sg_count++;
1798 }
1799 }
1800
1801 /* Number of page table (s/g) elements */
1802 orb->misc |= ORB_SET_DATA_SIZE(sg_count);
1803
1804 sbp2util_packet_dump(sg_element,
1805 (sizeof(struct sbp2_unrestricted_page_table)) * sg_count,
1806 "sbp2 s/g list", command->sge_dma);
1807
1808 /* Byte swap page tables if necessary */
1809 sbp2util_cpu_to_be32_buffer(sg_element,
1810 (sizeof(struct sbp2_unrestricted_page_table)) *
1811 sg_count);
1812 }
1813}
1814
1815static void sbp2_prep_command_orb_no_sg(struct sbp2_command_orb *orb,
1816 struct sbp2scsi_host_info *hi,
1817 struct sbp2_command_info *command,
1818 struct scatterlist *sgpnt,
1819 u32 orb_direction,
1820 unsigned int scsi_request_bufflen,
1821 void *scsi_request_buffer,
1822 enum dma_data_direction dma_dir)
1823{
1824 command->dma_dir = dma_dir;
1825 command->dma_size = scsi_request_bufflen;
1826 command->dma_type = CMD_DMA_SINGLE;
1827 command->cmd_dma = pci_map_single(hi->host->pdev, scsi_request_buffer,
1828 command->dma_size, command->dma_dir);
1829 orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1830 orb->misc |= ORB_SET_DIRECTION(orb_direction);
1831
1832 SBP2_DMA_ALLOC("single bulk");
1833
1834 /*
1835 * Handle case where we get a command w/o s/g enabled (but
1836 * check for transfers larger than 64K)
1837 */
1838 if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) {
1839
1840 orb->data_descriptor_lo = command->cmd_dma;
1841 orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen);
1842
1843 } else {
1844 struct sbp2_unrestricted_page_table *sg_element =
1845 &command->scatter_gather_element[0];
1846 u32 sg_count, sg_len;
1847 dma_addr_t sg_addr;
1848
1849 /*
1850 * Need to turn this into page tables, since the
1851 * buffer is too large.
1852 */
1853 orb->data_descriptor_lo = command->sge_dma;
1854
1855 /* Use page tables (s/g) */
1856 orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1857
1858 /*
1859 * fill out our sbp-2 page tables (and split up
1860 * the large buffer)
1861 */
1862 sg_count = 0;
1863 sg_len = scsi_request_bufflen;
1864 sg_addr = command->cmd_dma;
1865 while (sg_len) {
1866 sg_element[sg_count].segment_base_lo = sg_addr;
1867 if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
1868 sg_element[sg_count].length_segment_base_hi =
1869 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
1870 sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
1871 sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
1872 } else {
1873 sg_element[sg_count].length_segment_base_hi =
1874 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
1875 sg_len = 0;
1876 }
1877 sg_count++;
1878 }
1879
1880 /* Number of page table (s/g) elements */
1881 orb->misc |= ORB_SET_DATA_SIZE(sg_count);
1882
1883 sbp2util_packet_dump(sg_element,
1884 (sizeof(struct sbp2_unrestricted_page_table)) * sg_count,
1885 "sbp2 s/g list", command->sge_dma);
1886
1887 /* Byte swap page tables if necessary */
1888 sbp2util_cpu_to_be32_buffer(sg_element,
1889 (sizeof(struct sbp2_unrestricted_page_table)) *
1890 sg_count);
1891 }
1892}
1893
Linus Torvalds1da177e2005-04-16 15:20:36 -07001894/*
1895 * This function is called to create the actual command orb and s/g list
1896 * out of the scsi command itself.
1897 */
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001898static void sbp2_create_command_orb(struct scsi_id_instance_data *scsi_id,
1899 struct sbp2_command_info *command,
1900 unchar *scsi_cmd,
1901 unsigned int scsi_use_sg,
1902 unsigned int scsi_request_bufflen,
1903 void *scsi_request_buffer,
1904 enum dma_data_direction dma_dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001905{
1906 struct sbp2scsi_host_info *hi = scsi_id->hi;
Stefan Richtera237f352005-11-07 06:31:39 -05001907 struct scatterlist *sgpnt = (struct scatterlist *)scsi_request_buffer;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001908 struct sbp2_command_orb *command_orb = &command->command_orb;
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001909 u32 orb_direction;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001910
1911 /*
1912 * Set-up our command ORB..
1913 *
1914 * NOTE: We're doing unrestricted page tables (s/g), as this is
1915 * best performance (at least with the devices I have). This means
1916 * that data_size becomes the number of s/g elements, and
1917 * page_size should be zero (for unrestricted).
1918 */
1919 command_orb->next_ORB_hi = ORB_SET_NULL_PTR(1);
1920 command_orb->next_ORB_lo = 0x0;
1921 command_orb->misc = ORB_SET_MAX_PAYLOAD(scsi_id->max_payload_size);
1922 command_orb->misc |= ORB_SET_SPEED(scsi_id->speed_code);
Stefan Richtera237f352005-11-07 06:31:39 -05001923 command_orb->misc |= ORB_SET_NOTIFY(1); /* Notify us when complete */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001924
Stefan Richter43863eb2005-12-12 23:03:24 -05001925 if (dma_dir == DMA_NONE)
Stefan Richtera237f352005-11-07 06:31:39 -05001926 orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
Stefan Richter43863eb2005-12-12 23:03:24 -05001927 else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen)
Stefan Richtera237f352005-11-07 06:31:39 -05001928 orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA;
Stefan Richter43863eb2005-12-12 23:03:24 -05001929 else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen)
Stefan Richtera237f352005-11-07 06:31:39 -05001930 orb_direction = ORB_DIRECTION_READ_FROM_MEDIA;
Stefan Richter43863eb2005-12-12 23:03:24 -05001931 else {
1932 SBP2_WARN("Falling back to DMA_NONE");
1933 orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001934 }
1935
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001936 /* Set-up our pagetable stuff */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001937 if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001938 SBP2_DEBUG("No data transfer");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001939 command_orb->data_descriptor_hi = 0x0;
1940 command_orb->data_descriptor_lo = 0x0;
1941 command_orb->misc |= ORB_SET_DIRECTION(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001942 } else if (scsi_use_sg) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001943 SBP2_DEBUG("Use scatter/gather");
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001944 sbp2_prep_command_orb_sg(command_orb, hi, command, scsi_use_sg,
1945 sgpnt, orb_direction, dma_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001946 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001947 SBP2_DEBUG("No scatter/gather");
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001948 sbp2_prep_command_orb_no_sg(command_orb, hi, command, sgpnt,
1949 orb_direction, scsi_request_bufflen,
1950 scsi_request_buffer, dma_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001951 }
1952
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001953 /* Byte swap command ORB if necessary */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001954 sbp2util_cpu_to_be32_buffer(command_orb, sizeof(struct sbp2_command_orb));
1955
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001956 /* Put our scsi command in the command ORB */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001957 memset(command_orb->cdb, 0, 12);
1958 memcpy(command_orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001959}
1960
1961/*
1962 * This function is called in order to begin a regular SBP-2 command.
1963 */
1964static int sbp2_link_orb_command(struct scsi_id_instance_data *scsi_id,
1965 struct sbp2_command_info *command)
1966{
1967 struct sbp2scsi_host_info *hi = scsi_id->hi;
1968 struct sbp2_command_orb *command_orb = &command->command_orb;
1969 struct node_entry *ne = scsi_id->ne;
1970 u64 addr;
1971
1972 outstanding_orb_incr;
1973 SBP2_ORB_DEBUG("sending command orb %p, total orbs = %x",
Stefan Richtera237f352005-11-07 06:31:39 -05001974 command_orb, global_outstanding_command_orbs);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001975
1976 pci_dma_sync_single_for_device(hi->host->pdev, command->command_orb_dma,
1977 sizeof(struct sbp2_command_orb),
1978 PCI_DMA_BIDIRECTIONAL);
1979 pci_dma_sync_single_for_device(hi->host->pdev, command->sge_dma,
1980 sizeof(command->scatter_gather_element),
1981 PCI_DMA_BIDIRECTIONAL);
1982 /*
1983 * Check to see if there are any previous orbs to use
1984 */
1985 if (scsi_id->last_orb == NULL) {
1986 quadlet_t data[2];
1987
1988 /*
1989 * Ok, let's write to the target's management agent register
1990 */
1991 addr = scsi_id->sbp2_command_block_agent_addr + SBP2_ORB_POINTER_OFFSET;
1992 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1993 data[1] = command->command_orb_dma;
1994 sbp2util_cpu_to_be32_buffer(data, 8);
1995
1996 SBP2_ORB_DEBUG("write command agent, command orb %p", command_orb);
1997
1998 if (sbp2util_node_write_no_wait(ne, addr, data, 8) < 0) {
1999 SBP2_ERR("sbp2util_node_write_no_wait failed.\n");
2000 return -EIO;
2001 }
2002
2003 SBP2_ORB_DEBUG("write command agent complete");
2004
2005 scsi_id->last_orb = command_orb;
2006 scsi_id->last_orb_dma = command->command_orb_dma;
2007
2008 } else {
2009 quadlet_t data;
2010
2011 /*
2012 * We have an orb already sent (maybe or maybe not
2013 * processed) that we can append this orb to. So do so,
2014 * and ring the doorbell. Have to be very careful
2015 * modifying these next orb pointers, as they are accessed
2016 * both by the sbp2 device and us.
2017 */
2018 scsi_id->last_orb->next_ORB_lo =
Stefan Richtera237f352005-11-07 06:31:39 -05002019 cpu_to_be32(command->command_orb_dma);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002020 /* Tells hardware that this pointer is valid */
2021 scsi_id->last_orb->next_ORB_hi = 0x0;
Stefan Richtera237f352005-11-07 06:31:39 -05002022 pci_dma_sync_single_for_device(hi->host->pdev,
2023 scsi_id->last_orb_dma,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002024 sizeof(struct sbp2_command_orb),
2025 PCI_DMA_BIDIRECTIONAL);
2026
2027 /*
2028 * Ring the doorbell
2029 */
2030 data = cpu_to_be32(command->command_orb_dma);
2031 addr = scsi_id->sbp2_command_block_agent_addr + SBP2_DOORBELL_OFFSET;
2032
2033 SBP2_ORB_DEBUG("ring doorbell, command orb %p", command_orb);
2034
2035 if (sbp2util_node_write_no_wait(ne, addr, &data, 4) < 0) {
2036 SBP2_ERR("sbp2util_node_write_no_wait failed");
Stefan Richtera237f352005-11-07 06:31:39 -05002037 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002038 }
2039
2040 scsi_id->last_orb = command_orb;
2041 scsi_id->last_orb_dma = command->command_orb_dma;
2042
2043 }
Stefan Richtera237f352005-11-07 06:31:39 -05002044 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002045}
2046
2047/*
2048 * This function is called in order to begin a regular SBP-2 command.
2049 */
2050static int sbp2_send_command(struct scsi_id_instance_data *scsi_id,
2051 struct scsi_cmnd *SCpnt,
2052 void (*done)(struct scsi_cmnd *))
2053{
2054 unchar *cmd = (unchar *) SCpnt->cmnd;
2055 unsigned int request_bufflen = SCpnt->request_bufflen;
2056 struct sbp2_command_info *command;
2057
Stefan Richterd024ebc2006-03-28 20:03:55 -05002058 SBP2_DEBUG_ENTER();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002059 SBP2_DEBUG("SCSI transfer size = %x", request_bufflen);
2060 SBP2_DEBUG("SCSI s/g elements = %x", (unsigned int)SCpnt->use_sg);
2061
2062 /*
2063 * Allocate a command orb and s/g structure
2064 */
2065 command = sbp2util_allocate_command_orb(scsi_id, SCpnt, done);
2066 if (!command) {
Stefan Richtera237f352005-11-07 06:31:39 -05002067 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002068 }
2069
2070 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002071 * Now actually fill in the comamnd orb and sbp2 s/g list
2072 */
2073 sbp2_create_command_orb(scsi_id, command, cmd, SCpnt->use_sg,
2074 request_bufflen, SCpnt->request_buffer,
2075 SCpnt->sc_data_direction);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002076
2077 sbp2util_packet_dump(&command->command_orb, sizeof(struct sbp2_command_orb),
2078 "sbp2 command orb", command->command_orb_dma);
2079
2080 /*
2081 * Initialize status fifo
2082 */
2083 memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
2084
2085 /*
2086 * Link up the orb, and ring the doorbell if needed
2087 */
2088 sbp2_link_orb_command(scsi_id, command);
2089
Stefan Richtera237f352005-11-07 06:31:39 -05002090 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002091}
2092
Linus Torvalds1da177e2005-04-16 15:20:36 -07002093/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002094 * Translates SBP-2 status into SCSI sense data for check conditions
2095 */
2096static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, unchar *sense_data)
2097{
Stefan Richterd024ebc2006-03-28 20:03:55 -05002098 SBP2_DEBUG_ENTER();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002099
2100 /*
2101 * Ok, it's pretty ugly... ;-)
2102 */
2103 sense_data[0] = 0x70;
2104 sense_data[1] = 0x0;
2105 sense_data[2] = sbp2_status[9];
2106 sense_data[3] = sbp2_status[12];
2107 sense_data[4] = sbp2_status[13];
2108 sense_data[5] = sbp2_status[14];
2109 sense_data[6] = sbp2_status[15];
2110 sense_data[7] = 10;
2111 sense_data[8] = sbp2_status[16];
2112 sense_data[9] = sbp2_status[17];
2113 sense_data[10] = sbp2_status[18];
2114 sense_data[11] = sbp2_status[19];
2115 sense_data[12] = sbp2_status[10];
2116 sense_data[13] = sbp2_status[11];
2117 sense_data[14] = sbp2_status[20];
2118 sense_data[15] = sbp2_status[21];
2119
Stefan Richtera237f352005-11-07 06:31:39 -05002120 return sbp2_status[8] & 0x3f; /* return scsi status */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002121}
2122
2123/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002124 * This function deals with status writes from the SBP-2 device
2125 */
2126static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, int destid,
2127 quadlet_t *data, u64 addr, size_t length, u16 fl)
2128{
2129 struct sbp2scsi_host_info *hi;
2130 struct scsi_id_instance_data *scsi_id = NULL, *scsi_id_tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002131 struct scsi_cmnd *SCpnt = NULL;
2132 u32 scsi_status = SBP2_SCSI_STATUS_GOOD;
2133 struct sbp2_command_info *command;
Jody McIntyre79456192005-11-07 06:29:39 -05002134 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002135
Stefan Richterd024ebc2006-03-28 20:03:55 -05002136 SBP2_DEBUG_ENTER();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002137
2138 sbp2util_packet_dump(data, length, "sbp2 status write by device", (u32)addr);
2139
2140 if (!host) {
2141 SBP2_ERR("host is NULL - this is bad!");
Stefan Richtera237f352005-11-07 06:31:39 -05002142 return RCODE_ADDRESS_ERROR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002143 }
2144
2145 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
2146
2147 if (!hi) {
2148 SBP2_ERR("host info is NULL - this is bad!");
Stefan Richtera237f352005-11-07 06:31:39 -05002149 return RCODE_ADDRESS_ERROR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002150 }
2151
2152 /*
Stefan Richter35bdddb2006-01-31 00:13:33 -05002153 * Find our scsi_id structure by looking at the status fifo address
2154 * written to by the sbp2 device.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002155 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002156 list_for_each_entry(scsi_id_tmp, &hi->scsi_ids, scsi_list) {
Stefan Richter35bdddb2006-01-31 00:13:33 -05002157 if (scsi_id_tmp->ne->nodeid == nodeid &&
2158 scsi_id_tmp->status_fifo_addr == addr) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002159 scsi_id = scsi_id_tmp;
2160 break;
2161 }
2162 }
2163
2164 if (!scsi_id) {
2165 SBP2_ERR("scsi_id is NULL - device is gone?");
Stefan Richtera237f352005-11-07 06:31:39 -05002166 return RCODE_ADDRESS_ERROR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002167 }
2168
2169 /*
2170 * Put response into scsi_id status fifo...
2171 */
2172 memcpy(&scsi_id->status_block, data, length);
2173
2174 /*
2175 * Byte swap first two quadlets (8 bytes) of status for processing
2176 */
2177 sbp2util_be32_to_cpu_buffer(&scsi_id->status_block, 8);
2178
2179 /*
2180 * Handle command ORB status here if necessary. First, need to match status with command.
2181 */
2182 command = sbp2util_find_command_for_orb(scsi_id, scsi_id->status_block.ORB_offset_lo);
2183 if (command) {
2184
2185 SBP2_DEBUG("Found status for command ORB");
2186 pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma,
2187 sizeof(struct sbp2_command_orb),
2188 PCI_DMA_BIDIRECTIONAL);
2189 pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma,
2190 sizeof(command->scatter_gather_element),
2191 PCI_DMA_BIDIRECTIONAL);
2192
2193 SBP2_ORB_DEBUG("matched command orb %p", &command->command_orb);
2194 outstanding_orb_decr;
2195
2196 /*
2197 * Matched status with command, now grab scsi command pointers and check status
2198 */
2199 SCpnt = command->Current_SCpnt;
Stefan Richter24c7cd02006-04-01 21:11:41 +02002200 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002201 sbp2util_mark_command_completed(scsi_id, command);
Stefan Richter24c7cd02006-04-01 21:11:41 +02002202 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002203
2204 if (SCpnt) {
2205
2206 /*
2207 * See if the target stored any scsi status information
2208 */
2209 if (STATUS_GET_LENGTH(scsi_id->status_block.ORB_offset_hi_misc) > 1) {
2210 /*
2211 * Translate SBP-2 status to SCSI sense data
2212 */
2213 SBP2_DEBUG("CHECK CONDITION");
2214 scsi_status = sbp2_status_to_sense_data((unchar *)&scsi_id->status_block, SCpnt->sense_buffer);
2215 }
2216
2217 /*
2218 * Check to see if the dead bit is set. If so, we'll have to initiate
2219 * a fetch agent reset.
2220 */
2221 if (STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc)) {
2222
2223 /*
2224 * Initiate a fetch agent reset.
2225 */
2226 SBP2_DEBUG("Dead bit set - initiating fetch agent reset");
2227 sbp2_agent_reset(scsi_id, 0);
2228 }
2229
2230 SBP2_ORB_DEBUG("completing command orb %p", &command->command_orb);
2231 }
2232
2233 /*
2234 * Check here to see if there are no commands in-use. If there are none, we can
2235 * null out last orb so that next time around we write directly to the orb pointer...
2236 * Quick start saves one 1394 bus transaction.
2237 */
Jody McIntyre79456192005-11-07 06:29:39 -05002238 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002239 if (list_empty(&scsi_id->sbp2_command_orb_inuse)) {
2240 scsi_id->last_orb = NULL;
2241 }
Jody McIntyre79456192005-11-07 06:29:39 -05002242 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002243
2244 } else {
2245
2246 /*
2247 * It's probably a login/logout/reconnect status.
2248 */
2249 if ((scsi_id->login_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
2250 (scsi_id->query_logins_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
2251 (scsi_id->reconnect_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
2252 (scsi_id->logout_orb_dma == scsi_id->status_block.ORB_offset_lo)) {
2253 atomic_set(&scsi_id->sbp2_login_complete, 1);
2254 }
2255 }
2256
2257 if (SCpnt) {
2258
2259 /* Complete the SCSI command. */
2260 SBP2_DEBUG("Completing SCSI command");
2261 sbp2scsi_complete_command(scsi_id, scsi_status, SCpnt,
2262 command->Current_done);
2263 SBP2_ORB_DEBUG("command orb completed");
2264 }
2265
Stefan Richtera237f352005-11-07 06:31:39 -05002266 return RCODE_COMPLETE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002267}
2268
Linus Torvalds1da177e2005-04-16 15:20:36 -07002269/**************************************
2270 * SCSI interface related section
2271 **************************************/
2272
2273/*
2274 * This routine is the main request entry routine for doing I/O. It is
2275 * called from the scsi stack directly.
2276 */
2277static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt,
2278 void (*done)(struct scsi_cmnd *))
2279{
2280 struct scsi_id_instance_data *scsi_id =
2281 (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
2282 struct sbp2scsi_host_info *hi;
Jody McIntyreabd559b2005-09-30 11:59:06 -07002283 int result = DID_NO_CONNECT << 16;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002284
Stefan Richterd024ebc2006-03-28 20:03:55 -05002285 SBP2_DEBUG_ENTER();
2286#if (CONFIG_IEEE1394_SBP2_DEBUG >= 2) || defined(CONFIG_IEEE1394_SBP2_PACKET_DUMP)
2287 scsi_print_command(SCpnt);
2288#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002289
Jody McIntyreabd559b2005-09-30 11:59:06 -07002290 if (!sbp2util_node_is_available(scsi_id))
2291 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002292
2293 hi = scsi_id->hi;
2294
2295 if (!hi) {
2296 SBP2_ERR("sbp2scsi_host_info is NULL - this is bad!");
Jody McIntyreabd559b2005-09-30 11:59:06 -07002297 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002298 }
2299
2300 /*
2301 * Until we handle multiple luns, just return selection time-out
2302 * to any IO directed at non-zero LUNs
2303 */
Jody McIntyreabd559b2005-09-30 11:59:06 -07002304 if (SCpnt->device->lun)
2305 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002306
2307 /*
2308 * Check for request sense command, and handle it here
2309 * (autorequest sense)
2310 */
2311 if (SCpnt->cmnd[0] == REQUEST_SENSE) {
2312 SBP2_DEBUG("REQUEST_SENSE");
2313 memcpy(SCpnt->request_buffer, SCpnt->sense_buffer, SCpnt->request_bufflen);
2314 memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer));
2315 sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_GOOD, SCpnt, done);
Jody McIntyreabd559b2005-09-30 11:59:06 -07002316 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002317 }
2318
2319 /*
2320 * Check to see if we are in the middle of a bus reset.
2321 */
2322 if (!hpsb_node_entry_valid(scsi_id->ne)) {
2323 SBP2_ERR("Bus reset in progress - rejecting command");
Jody McIntyreabd559b2005-09-30 11:59:06 -07002324 result = DID_BUS_BUSY << 16;
2325 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002326 }
2327
2328 /*
Stefan Richter43863eb2005-12-12 23:03:24 -05002329 * Bidirectional commands are not yet implemented,
2330 * and unknown transfer direction not handled.
2331 */
2332 if (SCpnt->sc_data_direction == DMA_BIDIRECTIONAL) {
2333 SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command");
2334 result = DID_ERROR << 16;
2335 goto done;
2336 }
2337
2338 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002339 * Try and send our SCSI command
2340 */
2341 if (sbp2_send_command(scsi_id, SCpnt, done)) {
2342 SBP2_ERR("Error sending SCSI command");
2343 sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_SELECTION_TIMEOUT,
2344 SCpnt, done);
2345 }
Jody McIntyreabd559b2005-09-30 11:59:06 -07002346 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002347
Jody McIntyreabd559b2005-09-30 11:59:06 -07002348done:
2349 SCpnt->result = result;
2350 done(SCpnt);
2351 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002352}
2353
2354/*
2355 * This function is called in order to complete all outstanding SBP-2
2356 * commands (in case of resets, etc.).
2357 */
2358static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id,
2359 u32 status)
2360{
2361 struct sbp2scsi_host_info *hi = scsi_id->hi;
2362 struct list_head *lh;
2363 struct sbp2_command_info *command;
Jody McIntyre79456192005-11-07 06:29:39 -05002364 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002365
Stefan Richterd024ebc2006-03-28 20:03:55 -05002366 SBP2_DEBUG_ENTER();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002367
Jody McIntyre79456192005-11-07 06:29:39 -05002368 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002369 while (!list_empty(&scsi_id->sbp2_command_orb_inuse)) {
2370 SBP2_DEBUG("Found pending command to complete");
2371 lh = scsi_id->sbp2_command_orb_inuse.next;
2372 command = list_entry(lh, struct sbp2_command_info, list);
2373 pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma,
2374 sizeof(struct sbp2_command_orb),
2375 PCI_DMA_BIDIRECTIONAL);
2376 pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma,
2377 sizeof(command->scatter_gather_element),
2378 PCI_DMA_BIDIRECTIONAL);
2379 sbp2util_mark_command_completed(scsi_id, command);
2380 if (command->Current_SCpnt) {
2381 command->Current_SCpnt->result = status << 16;
2382 command->Current_done(command->Current_SCpnt);
2383 }
2384 }
Jody McIntyre79456192005-11-07 06:29:39 -05002385 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002386
2387 return;
2388}
2389
2390/*
2391 * This function is called in order to complete a regular SBP-2 command.
2392 *
2393 * This can be called in interrupt context.
2394 */
2395static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id,
2396 u32 scsi_status, struct scsi_cmnd *SCpnt,
2397 void (*done)(struct scsi_cmnd *))
2398{
Stefan Richterd024ebc2006-03-28 20:03:55 -05002399 SBP2_DEBUG_ENTER();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002400
2401 /*
2402 * Sanity
2403 */
2404 if (!SCpnt) {
2405 SBP2_ERR("SCpnt is NULL");
2406 return;
2407 }
2408
2409 /*
2410 * If a bus reset is in progress and there was an error, don't
2411 * complete the command, just let it get retried at the end of the
2412 * bus reset.
2413 */
Stefan Richtera237f352005-11-07 06:31:39 -05002414 if (!hpsb_node_entry_valid(scsi_id->ne)
2415 && (scsi_status != SBP2_SCSI_STATUS_GOOD)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002416 SBP2_ERR("Bus reset in progress - retry command later");
2417 return;
2418 }
Stefan Richtera237f352005-11-07 06:31:39 -05002419
Linus Torvalds1da177e2005-04-16 15:20:36 -07002420 /*
2421 * Switch on scsi status
2422 */
2423 switch (scsi_status) {
Stefan Richtera237f352005-11-07 06:31:39 -05002424 case SBP2_SCSI_STATUS_GOOD:
Stefan Richter8f0525f2006-03-28 20:03:45 -05002425 SCpnt->result = DID_OK << 16;
Stefan Richtera237f352005-11-07 06:31:39 -05002426 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002427
Stefan Richtera237f352005-11-07 06:31:39 -05002428 case SBP2_SCSI_STATUS_BUSY:
2429 SBP2_ERR("SBP2_SCSI_STATUS_BUSY");
2430 SCpnt->result = DID_BUS_BUSY << 16;
2431 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002432
Stefan Richtera237f352005-11-07 06:31:39 -05002433 case SBP2_SCSI_STATUS_CHECK_CONDITION:
2434 SBP2_DEBUG("SBP2_SCSI_STATUS_CHECK_CONDITION");
Stefan Richter8f0525f2006-03-28 20:03:45 -05002435 SCpnt->result = CHECK_CONDITION << 1 | DID_OK << 16;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002436#if CONFIG_IEEE1394_SBP2_DEBUG >= 1
Stefan Richtera237f352005-11-07 06:31:39 -05002437 scsi_print_command(SCpnt);
Stefan Richterd024ebc2006-03-28 20:03:55 -05002438 scsi_print_sense(SBP2_DEVICE_NAME, SCpnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002439#endif
Stefan Richtera237f352005-11-07 06:31:39 -05002440 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002441
Stefan Richtera237f352005-11-07 06:31:39 -05002442 case SBP2_SCSI_STATUS_SELECTION_TIMEOUT:
2443 SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT");
2444 SCpnt->result = DID_NO_CONNECT << 16;
2445 scsi_print_command(SCpnt);
2446 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002447
Stefan Richtera237f352005-11-07 06:31:39 -05002448 case SBP2_SCSI_STATUS_CONDITION_MET:
2449 case SBP2_SCSI_STATUS_RESERVATION_CONFLICT:
2450 case SBP2_SCSI_STATUS_COMMAND_TERMINATED:
2451 SBP2_ERR("Bad SCSI status = %x", scsi_status);
2452 SCpnt->result = DID_ERROR << 16;
2453 scsi_print_command(SCpnt);
2454 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002455
Stefan Richtera237f352005-11-07 06:31:39 -05002456 default:
2457 SBP2_ERR("Unsupported SCSI status = %x", scsi_status);
2458 SCpnt->result = DID_ERROR << 16;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002459 }
2460
2461 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002462 * If a bus reset is in progress and there was an error, complete
2463 * the command as busy so that it will get retried.
2464 */
Stefan Richtera237f352005-11-07 06:31:39 -05002465 if (!hpsb_node_entry_valid(scsi_id->ne)
2466 && (scsi_status != SBP2_SCSI_STATUS_GOOD)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002467 SBP2_ERR("Completing command with busy (bus reset)");
2468 SCpnt->result = DID_BUS_BUSY << 16;
2469 }
2470
2471 /*
2472 * If a unit attention occurs, return busy status so it gets
2473 * retried... it could have happened because of a 1394 bus reset
2474 * or hot-plug...
Stefan Richter8f0525f2006-03-28 20:03:45 -05002475 * XXX DID_BUS_BUSY is actually a bad idea because it will defy
2476 * the scsi layer's retry logic.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002477 */
2478#if 0
2479 if ((scsi_status == SBP2_SCSI_STATUS_CHECK_CONDITION) &&
2480 (SCpnt->sense_buffer[2] == UNIT_ATTENTION)) {
2481 SBP2_DEBUG("UNIT ATTENTION - return busy");
2482 SCpnt->result = DID_BUS_BUSY << 16;
2483 }
2484#endif
2485
2486 /*
2487 * Tell scsi stack that we're done with this command
2488 */
Stefan Richtera237f352005-11-07 06:31:39 -05002489 done(SCpnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002490}
2491
Jody McIntyreabd559b2005-09-30 11:59:06 -07002492static int sbp2scsi_slave_alloc(struct scsi_device *sdev)
2493{
Stefan Richtera80614d2006-02-14 22:04:19 -05002494 struct scsi_id_instance_data *scsi_id =
2495 (struct scsi_id_instance_data *)sdev->host->hostdata[0];
2496
2497 scsi_id->sdev = sdev;
2498
Stefan Richter24d3bf82006-05-15 22:04:59 +02002499 if (scsi_id->workarounds & SBP2_WORKAROUND_INQUIRY_36)
Stefan Richtera80614d2006-02-14 22:04:19 -05002500 sdev->inquiry_len = 36;
Jody McIntyreabd559b2005-09-30 11:59:06 -07002501 return 0;
2502}
2503
Jody McIntyreabd559b2005-09-30 11:59:06 -07002504static int sbp2scsi_slave_configure(struct scsi_device *sdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002505{
Stefan Richter24d3bf82006-05-15 22:04:59 +02002506 struct scsi_id_instance_data *scsi_id =
2507 (struct scsi_id_instance_data *)sdev->host->hostdata[0];
2508
Linus Torvalds1da177e2005-04-16 15:20:36 -07002509 blk_queue_dma_alignment(sdev->request_queue, (512 - 1));
Ben Collins365c7862005-11-07 06:31:24 -05002510 sdev->use_10_for_rw = 1;
2511 sdev->use_10_for_ms = 1;
Stefan Richter24d3bf82006-05-15 22:04:59 +02002512
2513 if (sdev->type == TYPE_DISK &&
2514 scsi_id->workarounds & SBP2_WORKAROUND_MODE_SENSE_8)
2515 sdev->skip_ms_page_8 = 1;
Stefan Richtere9a1c522006-05-15 22:06:37 +02002516 if (scsi_id->workarounds & SBP2_WORKAROUND_FIX_CAPACITY)
2517 sdev->fix_capacity = 1;
Stefan Richter31a379e2006-07-03 12:01:58 -04002518 if (scsi_id->ne->guid_vendor_id == 0x0010b9 && /* Maxtor's OUI */
2519 (sdev->type == TYPE_DISK || sdev->type == TYPE_RBC))
2520 sdev->allow_restart = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002521 return 0;
2522}
2523
Jody McIntyreabd559b2005-09-30 11:59:06 -07002524static void sbp2scsi_slave_destroy(struct scsi_device *sdev)
2525{
2526 ((struct scsi_id_instance_data *)sdev->host->hostdata[0])->sdev = NULL;
2527 return;
2528}
2529
Linus Torvalds1da177e2005-04-16 15:20:36 -07002530/*
2531 * Called by scsi stack when something has really gone wrong. Usually
2532 * called when a command has timed-out for some reason.
2533 */
2534static int sbp2scsi_abort(struct scsi_cmnd *SCpnt)
2535{
2536 struct scsi_id_instance_data *scsi_id =
2537 (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
2538 struct sbp2scsi_host_info *hi = scsi_id->hi;
2539 struct sbp2_command_info *command;
Stefan Richter24c7cd02006-04-01 21:11:41 +02002540 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002541
2542 SBP2_ERR("aborting sbp2 command");
2543 scsi_print_command(SCpnt);
2544
Jody McIntyreabd559b2005-09-30 11:59:06 -07002545 if (sbp2util_node_is_available(scsi_id)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002546
2547 /*
2548 * Right now, just return any matching command structures
2549 * to the free pool.
2550 */
Stefan Richter24c7cd02006-04-01 21:11:41 +02002551 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002552 command = sbp2util_find_command_for_SCpnt(scsi_id, SCpnt);
2553 if (command) {
2554 SBP2_DEBUG("Found command to abort");
2555 pci_dma_sync_single_for_cpu(hi->host->pdev,
2556 command->command_orb_dma,
2557 sizeof(struct sbp2_command_orb),
2558 PCI_DMA_BIDIRECTIONAL);
2559 pci_dma_sync_single_for_cpu(hi->host->pdev,
2560 command->sge_dma,
2561 sizeof(command->scatter_gather_element),
2562 PCI_DMA_BIDIRECTIONAL);
2563 sbp2util_mark_command_completed(scsi_id, command);
2564 if (command->Current_SCpnt) {
2565 command->Current_SCpnt->result = DID_ABORT << 16;
2566 command->Current_done(command->Current_SCpnt);
2567 }
2568 }
Stefan Richter24c7cd02006-04-01 21:11:41 +02002569 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002570
2571 /*
2572 * Initiate a fetch agent reset.
2573 */
2574 sbp2_agent_reset(scsi_id, 0);
2575 sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY);
2576 }
2577
Stefan Richtera237f352005-11-07 06:31:39 -05002578 return SUCCESS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002579}
2580
2581/*
2582 * Called by scsi stack when something has really gone wrong.
2583 */
Jody McIntyreabd559b2005-09-30 11:59:06 -07002584static int sbp2scsi_reset(struct scsi_cmnd *SCpnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002585{
2586 struct scsi_id_instance_data *scsi_id =
2587 (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
2588
2589 SBP2_ERR("reset requested");
2590
Jody McIntyreabd559b2005-09-30 11:59:06 -07002591 if (sbp2util_node_is_available(scsi_id)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002592 SBP2_ERR("Generating sbp2 fetch agent reset");
2593 sbp2_agent_reset(scsi_id, 0);
2594 }
2595
Jody McIntyreabd559b2005-09-30 11:59:06 -07002596 return SUCCESS;
Jeff Garzik 94d0e7b82005-05-28 07:55:48 -04002597}
2598
Stefan Richtera237f352005-11-07 06:31:39 -05002599static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev,
2600 struct device_attribute *attr,
2601 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002602{
2603 struct scsi_device *sdev;
2604 struct scsi_id_instance_data *scsi_id;
2605 int lun;
2606
2607 if (!(sdev = to_scsi_device(dev)))
2608 return 0;
2609
2610 if (!(scsi_id = (struct scsi_id_instance_data *)sdev->host->hostdata[0]))
2611 return 0;
2612
Ben Collinse309fc62005-11-07 06:31:34 -05002613 lun = ORB_SET_LUN(scsi_id->sbp2_lun);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002614
2615 return sprintf(buf, "%016Lx:%d:%d\n", (unsigned long long)scsi_id->ne->guid,
2616 scsi_id->ud->id, lun);
2617}
2618static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL);
2619
2620static struct device_attribute *sbp2_sysfs_sdev_attrs[] = {
2621 &dev_attr_ieee1394_id,
2622 NULL
2623};
2624
2625MODULE_AUTHOR("Ben Collins <bcollins@debian.org>");
2626MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver");
2627MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME);
2628MODULE_LICENSE("GPL");
2629
2630/* SCSI host template */
2631static struct scsi_host_template scsi_driver_template = {
2632 .module = THIS_MODULE,
2633 .name = "SBP-2 IEEE-1394",
2634 .proc_name = SBP2_DEVICE_NAME,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002635 .queuecommand = sbp2scsi_queuecommand,
2636 .eh_abort_handler = sbp2scsi_abort,
2637 .eh_device_reset_handler = sbp2scsi_reset,
Jody McIntyreabd559b2005-09-30 11:59:06 -07002638 .slave_alloc = sbp2scsi_slave_alloc,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002639 .slave_configure = sbp2scsi_slave_configure,
Jody McIntyreabd559b2005-09-30 11:59:06 -07002640 .slave_destroy = sbp2scsi_slave_destroy,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002641 .this_id = -1,
2642 .sg_tablesize = SG_ALL,
2643 .use_clustering = ENABLE_CLUSTERING,
2644 .cmd_per_lun = SBP2_MAX_CMDS,
2645 .can_queue = SBP2_MAX_CMDS,
2646 .emulated = 1,
2647 .sdev_attrs = sbp2_sysfs_sdev_attrs,
2648};
2649
2650static int sbp2_module_init(void)
2651{
2652 int ret;
2653
Stefan Richterd024ebc2006-03-28 20:03:55 -05002654 SBP2_DEBUG_ENTER();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002655
Linus Torvalds1da177e2005-04-16 15:20:36 -07002656 /* Module load debug option to force one command at a time (serializing I/O) */
2657 if (serialize_io) {
Jody McIntyre2bab3592005-09-30 11:59:07 -07002658 SBP2_INFO("Driver forced to serialize I/O (serialize_io=1)");
2659 SBP2_INFO("Try serialize_io=0 for better performance");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002660 scsi_driver_template.can_queue = 1;
2661 scsi_driver_template.cmd_per_lun = 1;
2662 }
2663
Stefan Richter24d3bf82006-05-15 22:04:59 +02002664 if (sbp2_default_workarounds & SBP2_WORKAROUND_128K_MAX_TRANS &&
2665 (max_sectors * 512) > (128 * 1024))
2666 max_sectors = 128 * 1024 / 512;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002667 scsi_driver_template.max_sectors = max_sectors;
2668
Linus Torvalds1da177e2005-04-16 15:20:36 -07002669 /* Register our high level driver with 1394 stack */
2670 hpsb_register_highlevel(&sbp2_highlevel);
2671
2672 ret = hpsb_register_protocol(&sbp2_driver);
2673 if (ret) {
2674 SBP2_ERR("Failed to register protocol");
2675 hpsb_unregister_highlevel(&sbp2_highlevel);
2676 return ret;
2677 }
2678
2679 return 0;
2680}
2681
2682static void __exit sbp2_module_exit(void)
2683{
Stefan Richterd024ebc2006-03-28 20:03:55 -05002684 SBP2_DEBUG_ENTER();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002685
2686 hpsb_unregister_protocol(&sbp2_driver);
2687
2688 hpsb_unregister_highlevel(&sbp2_highlevel);
2689}
2690
2691module_init(sbp2_module_init);
2692module_exit(sbp2_module_exit);