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[PATCH] sbp2: add read_capacity workaround for iPod
[deliverable/linux.git] / drivers / ieee1394 / sbp2.c
CommitLineData
1da177e4
LT		 1/*
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
41#include <linux/config.h>
42#include <linux/kernel.h>
43#include <linux/list.h>
44#include <linux/string.h>
24d3bf88 45#include <linux/stringify.h>
1da177e4
LT		 46#include <linux/slab.h>
47#include <linux/interrupt.h>
48#include <linux/fs.h>
49#include <linux/poll.h>
50#include <linux/module.h>
51#include <linux/moduleparam.h>
52#include <linux/types.h>
53#include <linux/delay.h>
54#include <linux/sched.h>
55#include <linux/blkdev.h>
56#include <linux/smp_lock.h>
57#include <linux/init.h>
58#include <linux/pci.h>
59
60#include <asm/current.h>
61#include <asm/uaccess.h>
62#include <asm/io.h>
63#include <asm/byteorder.h>
64#include <asm/atomic.h>
65#include <asm/system.h>
66#include <asm/scatterlist.h>
67
68#include <scsi/scsi.h>
69#include <scsi/scsi_cmnd.h>
70#include <scsi/scsi_dbg.h>
71#include <scsi/scsi_device.h>
72#include <scsi/scsi_host.h>
73
74#include "csr1212.h"
75#include "ieee1394.h"
76#include "ieee1394_types.h"
77#include "ieee1394_core.h"
78#include "nodemgr.h"
79#include "hosts.h"
80#include "highlevel.h"
81#include "ieee1394_transactions.h"
82#include "sbp2.h"
83
1da177e4
LT		 84/*
85 * Module load parameter definitions
86 */
87
88/*
89 * Change max_speed on module load if you have a bad IEEE-1394
90 * controller that has trouble running 2KB packets at 400mb.
91 *
92 * NOTE: On certain OHCI parts I have seen short packets on async transmit
93 * (probably due to PCI latency/throughput issues with the part). You can
94 * bump down the speed if you are running into problems.
95 */
96static int max_speed = IEEE1394_SPEED_MAX;
97module_param(max_speed, int, 0644);
2bab359a 98MODULE_PARM_DESC(max_speed, "Force max speed (3 = 800mb, 2 = 400mb, 1 = 200mb, 0 = 100mb)");
1da177e4
LT		 99
100/*
101 * Set serialize_io to 1 if you'd like only one scsi command sent
102 * down to us at a time (debugging). This might be necessary for very
103 * badly behaved sbp2 devices.
2bab359a
JM		 104 *
105 * TODO: Make this configurable per device.
1da177e4 106 */
2bab359a 107static int serialize_io = 1;
1da177e4 108module_param(serialize_io, int, 0444);
2bab359a 109MODULE_PARM_DESC(serialize_io, "Serialize I/O coming from scsi drivers (default = 1, faster = 0)");
1da177e4
LT		 110
111/*
112 * Bump up max_sectors if you'd like to support very large sized
113 * transfers. Please note that some older sbp2 bridge chips are broken for
114 * transfers greater or equal to 128KB. Default is a value of 255
115 * sectors, or just under 128KB (at 512 byte sector size). I can note that
116 * the Oxsemi sbp2 chipsets have no problems supporting very large
117 * transfer sizes.
118 */
119static int max_sectors = SBP2_MAX_SECTORS;
120module_param(max_sectors, int, 0444);
24d3bf88
SR		 121MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported (default = "
122 __stringify(SBP2_MAX_SECTORS) ")");
1da177e4
LT		 123
124/*
125 * Exclusive login to sbp2 device? In most cases, the sbp2 driver should
126 * do an exclusive login, as it's generally unsafe to have two hosts
127 * talking to a single sbp2 device at the same time (filesystem coherency,
128 * etc.). If you're running an sbp2 device that supports multiple logins,
129 * and you're either running read-only filesystems or some sort of special
130 * filesystem supporting multiple hosts (one such filesystem is OpenGFS,
131 * see opengfs.sourceforge.net for more info), then set exclusive_login
132 * to zero. Note: The Oxsemi OXFW911 sbp2 chipset supports up to four
133 * concurrent logins.
134 */
135static int exclusive_login = 1;
136module_param(exclusive_login, int, 0644);
137MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device (default = 1)");
138
139/*
24d3bf88
SR		 140 * If any of the following workarounds is required for your device to work,
141 * please submit the kernel messages logged by sbp2 to the linux1394-devel
142 * mailing list.
1da177e4 143 *
24d3bf88
SR		 144 * - 128kB max transfer
145 * Limit transfer size. Necessary for some old bridges.
146 *
147 * - 36 byte inquiry
148 * When scsi_mod probes the device, let the inquiry command look like that
149 * from MS Windows.
150 *
151 * - skip mode page 8
152 * Suppress sending of mode_sense for mode page 8 if the device pretends to
153 * support the SCSI Primary Block commands instead of Reduced Block Commands.
e9a1c52c
SR		 154 *
155 * - fix capacity
156 * Tell sd_mod to correct the last sector number reported by read_capacity.
157 * Avoids access beyond actual disk limits on devices with an off-by-one bug.
158 * Don't use this with devices which don't have this bug.
1da177e4 159 */
24d3bf88
SR		 160static int sbp2_default_workarounds;
161module_param_named(workarounds, sbp2_default_workarounds, int, 0644);
162MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0"
163 ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS)
164 ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36)
165 ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8)
e9a1c52c 166 ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY)
24d3bf88
SR		 167 ", or a combination)");
168
169/* legacy parameter */
1934b8b6 170static int force_inquiry_hack;
a80614d1 171module_param(force_inquiry_hack, int, 0644);
24d3bf88 172MODULE_PARM_DESC(force_inquiry_hack, "Deprecated, use 'workarounds'");
1da177e4 173
1da177e4
LT		 174/*
175 * Export information about protocols/devices supported by this driver.
176 */
177static struct ieee1394_device_id sbp2_id_table[] = {
178 {
a237f35f
SR		 179 .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
180 .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff,
181 .version = SBP2_SW_VERSION_ENTRY & 0xffffff},
182 {}
1da177e4
LT		 183};
184
185MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table);
186
187/*
188 * Debug levels, configured via kernel config, or enable here.
189 */
190
44456d37 191#define CONFIG_IEEE1394_SBP2_DEBUG 0
1da177e4
LT		 192/* #define CONFIG_IEEE1394_SBP2_DEBUG_ORBS */
193/* #define CONFIG_IEEE1394_SBP2_DEBUG_DMA */
194/* #define CONFIG_IEEE1394_SBP2_DEBUG 1 */
195/* #define CONFIG_IEEE1394_SBP2_DEBUG 2 */
196/* #define CONFIG_IEEE1394_SBP2_PACKET_DUMP */
197
198#ifdef CONFIG_IEEE1394_SBP2_DEBUG_ORBS
199#define SBP2_ORB_DEBUG(fmt, args...) HPSB_ERR("sbp2(%s): "fmt, __FUNCTION__, ## args)
200static u32 global_outstanding_command_orbs = 0;
201#define outstanding_orb_incr global_outstanding_command_orbs++
202#define outstanding_orb_decr global_outstanding_command_orbs--
203#else
204#define SBP2_ORB_DEBUG(fmt, args...)
205#define outstanding_orb_incr
206#define outstanding_orb_decr
207#endif
208
209#ifdef CONFIG_IEEE1394_SBP2_DEBUG_DMA
210#define SBP2_DMA_ALLOC(fmt, args...) \
211 HPSB_ERR("sbp2(%s)alloc(%d): "fmt, __FUNCTION__, \
212 ++global_outstanding_dmas, ## args)
213#define SBP2_DMA_FREE(fmt, args...) \
214 HPSB_ERR("sbp2(%s)free(%d): "fmt, __FUNCTION__, \
215 --global_outstanding_dmas, ## args)
216static u32 global_outstanding_dmas = 0;
217#else
218#define SBP2_DMA_ALLOC(fmt, args...)
219#define SBP2_DMA_FREE(fmt, args...)
220#endif
221
222#if CONFIG_IEEE1394_SBP2_DEBUG >= 2
223#define SBP2_DEBUG(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
224#define SBP2_INFO(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
225#define SBP2_NOTICE(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
226#define SBP2_WARN(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
227#elif CONFIG_IEEE1394_SBP2_DEBUG == 1
228#define SBP2_DEBUG(fmt, args...) HPSB_DEBUG("sbp2: "fmt, ## args)
229#define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
230#define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args)
231#define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args)
232#else
233#define SBP2_DEBUG(fmt, args...)
234#define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
235#define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args)
236#define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args)
237#endif
238
239#define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
d024ebc6 240#define SBP2_DEBUG_ENTER() SBP2_DEBUG("%s", __FUNCTION__)
1da177e4 241
1da177e4
LT		 242/*
243 * Globals
244 */
245
246static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id,
247 u32 status);
248
249static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id,
250 u32 scsi_status, struct scsi_cmnd *SCpnt,
251 void (*done)(struct scsi_cmnd *));
252
253static struct scsi_host_template scsi_driver_template;
254
255static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC };
256
257static void sbp2_host_reset(struct hpsb_host *host);
258
259static int sbp2_probe(struct device *dev);
260static int sbp2_remove(struct device *dev);
261static int sbp2_update(struct unit_directory *ud);
262
263static struct hpsb_highlevel sbp2_highlevel = {
264 .name = SBP2_DEVICE_NAME,
265 .host_reset = sbp2_host_reset,
266};
267
268static struct hpsb_address_ops sbp2_ops = {
269 .write = sbp2_handle_status_write
270};
271
272#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
273static struct hpsb_address_ops sbp2_physdma_ops = {
a237f35f
SR		 274 .read = sbp2_handle_physdma_read,
275 .write = sbp2_handle_physdma_write,
1da177e4
LT		 276};
277#endif
278
279static struct hpsb_protocol_driver sbp2_driver = {
280 .name = "SBP2 Driver",
281 .id_table = sbp2_id_table,
282 .update = sbp2_update,
283 .driver = {
284 .name = SBP2_DEVICE_NAME,
285 .bus = &ieee1394_bus_type,
286 .probe = sbp2_probe,
287 .remove = sbp2_remove,
288 },
289};
290
a80614d1 291/*
24d3bf88
SR		 292 * List of devices with known bugs.
293 *
294 * The firmware_revision field, masked with 0xffff00, is the best indicator
295 * for the type of bridge chip of a device. It yields a few false positives
296 * but this did not break correctly behaving devices so far.
a80614d1 297 */
24d3bf88
SR		 298static const struct {
299 u32 firmware_revision;
e9a1c52c 300 u32 model_id;
24d3bf88
SR		 301 unsigned workarounds;
302} sbp2_workarounds_table[] = {
303 /* TSB42AA9 */ {
304 .firmware_revision = 0x002800,
305 .workarounds = SBP2_WORKAROUND_INQUIRY_36 |
306 SBP2_WORKAROUND_MODE_SENSE_8,
307 },
308 /* Initio bridges, actually only needed for some older ones */ {
309 .firmware_revision = 0x000200,
310 .workarounds = SBP2_WORKAROUND_INQUIRY_36,
311 },
312 /* Symbios bridge */ {
313 .firmware_revision = 0xa0b800,
314 .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS,
e9a1c52c
SR		 315 },
316 /*
317 * Note about the following Apple iPod blacklist entries:
318 *
319 * There are iPods (2nd gen, 3rd gen) with model_id==0. Since our
320 * matching logic treats 0 as a wildcard, we cannot match this ID
321 * without rewriting the matching routine. Fortunately these iPods
322 * do not feature the read_capacity bug according to one report.
323 * Read_capacity behaviour as well as model_id could change due to
324 * Apple-supplied firmware updates though.
325 */
326 /* iPod 4th generation */ {
327 .firmware_revision = 0x0a2700,
328 .model_id = 0x000021,
329 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
330 },
331 /* iPod mini */ {
332 .firmware_revision = 0x0a2700,
333 .model_id = 0x000023,
334 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
335 },
336 /* iPod Photo */ {
337 .firmware_revision = 0x0a2700,
338 .model_id = 0x00007e,
339 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
24d3bf88 340 }
1da177e4
LT		 341};
342
1da177e4
LT		 343/**************************************
344 * General utility functions
345 **************************************/
346
1da177e4
LT		 347#ifndef __BIG_ENDIAN
348/*
349 * Converts a buffer from be32 to cpu byte ordering. Length is in bytes.
350 */
351static __inline__ void sbp2util_be32_to_cpu_buffer(void *buffer, int length)
352{
353 u32 *temp = buffer;
354
355 for (length = (length >> 2); length--; )
356 temp[length] = be32_to_cpu(temp[length]);
357
358 return;
359}
360
361/*
362 * Converts a buffer from cpu to be32 byte ordering. Length is in bytes.
363 */
364static __inline__ void sbp2util_cpu_to_be32_buffer(void *buffer, int length)
365{
366 u32 *temp = buffer;
367
368 for (length = (length >> 2); length--; )
369 temp[length] = cpu_to_be32(temp[length]);
370
371 return;
372}
373#else /* BIG_ENDIAN */
374/* Why waste the cpu cycles? */
375#define sbp2util_be32_to_cpu_buffer(x,y)
376#define sbp2util_cpu_to_be32_buffer(x,y)
377#endif
378
379#ifdef CONFIG_IEEE1394_SBP2_PACKET_DUMP
380/*
381 * Debug packet dump routine. Length is in bytes.
382 */
a237f35f
SR		 383static void sbp2util_packet_dump(void *buffer, int length, char *dump_name,
384 u32 dump_phys_addr)
1da177e4
LT		 385{
386 int i;
387 unsigned char *dump = buffer;
388
389 if (!dump || !length || !dump_name)
390 return;
391
392 if (dump_phys_addr)
393 printk("[%s, 0x%x]", dump_name, dump_phys_addr);
394 else
395 printk("[%s]", dump_name);
396 for (i = 0; i < length; i++) {
397 if (i > 0x3f) {
398 printk("\n ...");
399 break;
400 }
401 if ((i & 0x3) == 0)
402 printk(" ");
403 if ((i & 0xf) == 0)
404 printk("\n ");
a237f35f 405 printk("%02x ", (int)dump[i]);
1da177e4
LT		 406 }
407 printk("\n");
408
409 return;
410}
411#else
412#define sbp2util_packet_dump(w,x,y,z)
413#endif
414
415/*
416 * Goofy routine that basically does a down_timeout function.
417 */
418static int sbp2util_down_timeout(atomic_t *done, int timeout)
419{
420 int i;
421
422 for (i = timeout; (i > 0 && atomic_read(done) == 0); i-= HZ/10) {
423 if (msleep_interruptible(100)) /* 100ms */
a237f35f 424 return 1;
1da177e4 425 }
a237f35f 426 return (i > 0) ? 0 : 1;
1da177e4
LT		 427}
428
429/* Free's an allocated packet */
430static void sbp2_free_packet(struct hpsb_packet *packet)
431{
432 hpsb_free_tlabel(packet);
433 hpsb_free_packet(packet);
434}
435
436/* This is much like hpsb_node_write(), except it ignores the response
437 * subaction and returns immediately. Can be used from interrupts.
438 */
439static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr,
a237f35f 440 quadlet_t *buffer, size_t length)
1da177e4
LT		 441{
442 struct hpsb_packet *packet;
443
444 packet = hpsb_make_writepacket(ne->host, ne->nodeid,
445 addr, buffer, length);
a237f35f
SR		 446 if (!packet)
447 return -ENOMEM;
1da177e4 448
a237f35f
SR		 449 hpsb_set_packet_complete_task(packet,
450 (void (*)(void *))sbp2_free_packet,
1da177e4
LT		 451 packet);
452
453 hpsb_node_fill_packet(ne, packet);
454
a237f35f 455 if (hpsb_send_packet(packet) < 0) {
1da177e4
LT		 456 sbp2_free_packet(packet);
457 return -EIO;
458 }
459
460 return 0;
461}
462
463/*
464 * This function is called to create a pool of command orbs used for
465 * command processing. It is called when a new sbp2 device is detected.
466 */
467static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data *scsi_id)
468{
469 struct sbp2scsi_host_info *hi = scsi_id->hi;
470 int i;
471 unsigned long flags, orbs;
472 struct sbp2_command_info *command;
473
474 orbs = serialize_io ? 2 : SBP2_MAX_CMDS;
475
476 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
477 for (i = 0; i < orbs; i++) {
8551158a 478 command = kzalloc(sizeof(*command), GFP_ATOMIC);
1da177e4 479 if (!command) {
a237f35f
SR		 480 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock,
481 flags);
482 return -ENOMEM;
1da177e4 483 }
1da177e4 484 command->command_orb_dma =
a237f35f
SR		 485 pci_map_single(hi->host->pdev, &command->command_orb,
486 sizeof(struct sbp2_command_orb),
487 PCI_DMA_BIDIRECTIONAL);
1da177e4
LT		 488 SBP2_DMA_ALLOC("single command orb DMA");
489 command->sge_dma =
a237f35f
SR		 490 pci_map_single(hi->host->pdev,
491 &command->scatter_gather_element,
492 sizeof(command->scatter_gather_element),
493 PCI_DMA_BIDIRECTIONAL);
1da177e4
LT		 494 SBP2_DMA_ALLOC("scatter_gather_element");
495 INIT_LIST_HEAD(&command->list);
496 list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed);
497 }
498 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
499 return 0;
500}
501
502/*
503 * This function is called to delete a pool of command orbs.
504 */
505static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data *scsi_id)
506{
507 struct hpsb_host *host = scsi_id->hi->host;
508 struct list_head *lh, *next;
509 struct sbp2_command_info *command;
510 unsigned long flags;
511
512 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
513 if (!list_empty(&scsi_id->sbp2_command_orb_completed)) {
514 list_for_each_safe(lh, next, &scsi_id->sbp2_command_orb_completed) {
515 command = list_entry(lh, struct sbp2_command_info, list);
516
517 /* Release our generic DMA's */
518 pci_unmap_single(host->pdev, command->command_orb_dma,
519 sizeof(struct sbp2_command_orb),
520 PCI_DMA_BIDIRECTIONAL);
521 SBP2_DMA_FREE("single command orb DMA");
522 pci_unmap_single(host->pdev, command->sge_dma,
523 sizeof(command->scatter_gather_element),
524 PCI_DMA_BIDIRECTIONAL);
525 SBP2_DMA_FREE("scatter_gather_element");
526
527 kfree(command);
528 }
529 }
530 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
531 return;
532}
533
534/*
535 * This function finds the sbp2_command for a given outstanding command
536 * orb.Only looks at the inuse list.
537 */
538static struct sbp2_command_info *sbp2util_find_command_for_orb(
539 struct scsi_id_instance_data *scsi_id, dma_addr_t orb)
540{
541 struct sbp2_command_info *command;
542 unsigned long flags;
543
544 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
545 if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) {
546 list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) {
547 if (command->command_orb_dma == orb) {
548 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
a237f35f 549 return command;
1da177e4
LT		 550 }
551 }
552 }
553 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
554
555 SBP2_ORB_DEBUG("could not match command orb %x", (unsigned int)orb);
556
a237f35f 557 return NULL;
1da177e4
LT		 558}
559
560/*
561 * This function finds the sbp2_command for a given outstanding SCpnt.
562 * Only looks at the inuse list.
24c7cd06 563 * Must be called with scsi_id->sbp2_command_orb_lock held.
1da177e4 564 */
24c7cd06
SR		 565static struct sbp2_command_info *sbp2util_find_command_for_SCpnt(
566 struct scsi_id_instance_data *scsi_id, void *SCpnt)
1da177e4
LT		 567{
568 struct sbp2_command_info *command;
1da177e4 569
24c7cd06
SR		 570 if (!list_empty(&scsi_id->sbp2_command_orb_inuse))
571 list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list)
572 if (command->Current_SCpnt == SCpnt)
a237f35f 573 return command;
a237f35f 574 return NULL;
1da177e4
LT		 575}
576
577/*
578 * This function allocates a command orb used to send a scsi command.
579 */
580static struct sbp2_command_info *sbp2util_allocate_command_orb(
581 struct scsi_id_instance_data *scsi_id,
582 struct scsi_cmnd *Current_SCpnt,
583 void (*Current_done)(struct scsi_cmnd *))
584{
585 struct list_head *lh;
586 struct sbp2_command_info *command = NULL;
587 unsigned long flags;
588
589 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
590 if (!list_empty(&scsi_id->sbp2_command_orb_completed)) {
591 lh = scsi_id->sbp2_command_orb_completed.next;
592 list_del(lh);
593 command = list_entry(lh, struct sbp2_command_info, list);
594 command->Current_done = Current_done;
595 command->Current_SCpnt = Current_SCpnt;
596 list_add_tail(&command->list, &scsi_id->sbp2_command_orb_inuse);
597 } else {
d024ebc6 598 SBP2_ERR("%s: no orbs available", __FUNCTION__);
1da177e4
LT		 599 }
600 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
a237f35f 601 return command;
1da177e4
LT		 602}
603
604/* Free our DMA's */
605static void sbp2util_free_command_dma(struct sbp2_command_info *command)
606{
607 struct scsi_id_instance_data *scsi_id =
608 (struct scsi_id_instance_data *)command->Current_SCpnt->device->host->hostdata[0];
609 struct hpsb_host *host;
610
611 if (!scsi_id) {
d024ebc6 612 SBP2_ERR("%s: scsi_id == NULL", __FUNCTION__);
1da177e4
LT		 613 return;
614 }
615
616 host = scsi_id->ud->ne->host;
617
618 if (command->cmd_dma) {
619 if (command->dma_type == CMD_DMA_SINGLE) {
620 pci_unmap_single(host->pdev, command->cmd_dma,
621 command->dma_size, command->dma_dir);
622 SBP2_DMA_FREE("single bulk");
623 } else if (command->dma_type == CMD_DMA_PAGE) {
624 pci_unmap_page(host->pdev, command->cmd_dma,
625 command->dma_size, command->dma_dir);
626 SBP2_DMA_FREE("single page");
627 } /* XXX: Check for CMD_DMA_NONE bug */
628 command->dma_type = CMD_DMA_NONE;
629 command->cmd_dma = 0;
630 }
631
632 if (command->sge_buffer) {
633 pci_unmap_sg(host->pdev, command->sge_buffer,
634 command->dma_size, command->dma_dir);
635 SBP2_DMA_FREE("scatter list");
636 command->sge_buffer = NULL;
637 }
638}
639
640/*
641 * This function moves a command to the completed orb list.
24c7cd06 642 * Must be called with scsi_id->sbp2_command_orb_lock held.
1da177e4 643 */
24c7cd06
SR		 644static void sbp2util_mark_command_completed(
645 struct scsi_id_instance_data *scsi_id,
646 struct sbp2_command_info *command)
1da177e4 647{
1da177e4
LT		 648 list_del(&command->list);
649 sbp2util_free_command_dma(command);
650 list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed);
1da177e4
LT		 651}
652
abd559b1
JM		 653/*
654 * Is scsi_id valid? Is the 1394 node still present?
655 */
656static inline int sbp2util_node_is_available(struct scsi_id_instance_data *scsi_id)
657{
658 return scsi_id && scsi_id->ne && !scsi_id->ne->in_limbo;
659}
660
1da177e4
LT		 661/*********************************************
662 * IEEE-1394 core driver stack related section
663 *********************************************/
664static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud);
665
666static int sbp2_probe(struct device *dev)
667{
668 struct unit_directory *ud;
669 struct scsi_id_instance_data *scsi_id;
670
d024ebc6 671 SBP2_DEBUG_ENTER();
1da177e4
LT		 672
673 ud = container_of(dev, struct unit_directory, device);
674
675 /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s)
676 * instead. */
677 if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY)
678 return -ENODEV;
679
a237f35f 680 scsi_id = sbp2_alloc_device(ud);
1da177e4 681
a237f35f
SR		 682 if (!scsi_id)
683 return -ENOMEM;
1da177e4 684
a237f35f 685 sbp2_parse_unit_directory(scsi_id, ud);
1da177e4 686
a237f35f 687 return sbp2_start_device(scsi_id);
1da177e4
LT		 688}
689
690static int sbp2_remove(struct device *dev)
691{
692 struct unit_directory *ud;
693 struct scsi_id_instance_data *scsi_id;
abd559b1 694 struct scsi_device *sdev;
1da177e4 695
d024ebc6 696 SBP2_DEBUG_ENTER();
1da177e4
LT		 697
698 ud = container_of(dev, struct unit_directory, device);
699 scsi_id = ud->device.driver_data;
abd559b1
JM		 700 if (!scsi_id)
701 return 0;
702
bf637ec3
SR		 703 if (scsi_id->scsi_host) {
704 /* Get rid of enqueued commands if there is no chance to
705 * send them. */
706 if (!sbp2util_node_is_available(scsi_id))
707 sbp2scsi_complete_all_commands(scsi_id, DID_NO_CONNECT);
708 /* scsi_remove_device() will trigger shutdown functions of SCSI
709 * highlevel drivers which would deadlock if blocked. */
abd559b1 710 scsi_unblock_requests(scsi_id->scsi_host);
bf637ec3 711 }
abd559b1
JM		 712 sdev = scsi_id->sdev;
713 if (sdev) {
714 scsi_id->sdev = NULL;
715 scsi_remove_device(sdev);
716 }
1da177e4
LT		 717
718 sbp2_logout_device(scsi_id);
719 sbp2_remove_device(scsi_id);
720
721 return 0;
722}
723
724static int sbp2_update(struct unit_directory *ud)
725{
726 struct scsi_id_instance_data *scsi_id = ud->device.driver_data;
727
d024ebc6 728 SBP2_DEBUG_ENTER();
1da177e4
LT		 729
730 if (sbp2_reconnect_device(scsi_id)) {
731
732 /*
733 * Ok, reconnect has failed. Perhaps we didn't
734 * reconnect fast enough. Try doing a regular login, but
735 * first do a logout just in case of any weirdness.
736 */
737 sbp2_logout_device(scsi_id);
738
739 if (sbp2_login_device(scsi_id)) {
740 /* Login failed too, just fail, and the backend
741 * will call our sbp2_remove for us */
742 SBP2_ERR("Failed to reconnect to sbp2 device!");
743 return -EBUSY;
744 }
745 }
746
747 /* Set max retries to something large on the device. */
748 sbp2_set_busy_timeout(scsi_id);
749
750 /* Do a SBP-2 fetch agent reset. */
751 sbp2_agent_reset(scsi_id, 1);
752
753 /* Get the max speed and packet size that we can use. */
754 sbp2_max_speed_and_size(scsi_id);
755
756 /* Complete any pending commands with busy (so they get
757 * retried) and remove them from our queue
758 */
759 sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY);
760
761 /* Make sure we unblock requests (since this is likely after a bus
762 * reset). */
763 scsi_unblock_requests(scsi_id->scsi_host);
764
765 return 0;
766}
767
768/* This functions is called by the sbp2_probe, for each new device. We now
769 * allocate one scsi host for each scsi_id (unit directory). */
770static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud)
771{
772 struct sbp2scsi_host_info *hi;
773 struct Scsi_Host *scsi_host = NULL;
774 struct scsi_id_instance_data *scsi_id = NULL;
775
d024ebc6 776 SBP2_DEBUG_ENTER();
1da177e4 777
8551158a 778 scsi_id = kzalloc(sizeof(*scsi_id), GFP_KERNEL);
1da177e4
LT		 779 if (!scsi_id) {
780 SBP2_ERR("failed to create scsi_id");
781 goto failed_alloc;
782 }
1da177e4
LT		 783
784 scsi_id->ne = ud->ne;
785 scsi_id->ud = ud;
786 scsi_id->speed_code = IEEE1394_SPEED_100;
787 scsi_id->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100];
788 atomic_set(&scsi_id->sbp2_login_complete, 0);
789 INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_inuse);
790 INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_completed);
791 INIT_LIST_HEAD(&scsi_id->scsi_list);
792 spin_lock_init(&scsi_id->sbp2_command_orb_lock);
e309fc6d 793 scsi_id->sbp2_lun = 0;
1da177e4
LT		 794
795 ud->device.driver_data = scsi_id;
796
797 hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host);
798 if (!hi) {
799 hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host, sizeof(*hi));
800 if (!hi) {
801 SBP2_ERR("failed to allocate hostinfo");
802 goto failed_alloc;
803 }
804 SBP2_DEBUG("sbp2_alloc_device: allocated hostinfo");
805 hi->host = ud->ne->host;
806 INIT_LIST_HEAD(&hi->scsi_ids);
807
1da177e4
LT		 808#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
809 /* Handle data movement if physical dma is not
55664051
SR		 810 * enabled or not supported on host controller */
811 if (!hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host,
812 &sbp2_physdma_ops,
813 0x0ULL, 0xfffffffcULL)) {
814 SBP2_ERR("failed to register lower 4GB address range");
815 goto failed_alloc;
816 }
1da177e4
LT		 817#endif
818 }
819
147830f2
SR		 820 /* Prevent unloading of the 1394 host */
821 if (!try_module_get(hi->host->driver->owner)) {
822 SBP2_ERR("failed to get a reference on 1394 host driver");
823 goto failed_alloc;
824 }
825
1da177e4
LT		 826 scsi_id->hi = hi;
827
828 list_add_tail(&scsi_id->scsi_list, &hi->scsi_ids);
829
35bdddb8
SR		 830 /* Register the status FIFO address range. We could use the same FIFO
831 * for targets at different nodes. However we need different FIFOs per
832 * target in order to support multi-unit devices. */
833 scsi_id->status_fifo_addr = hpsb_allocate_and_register_addrspace(
834 &sbp2_highlevel, ud->ne->host, &sbp2_ops,
835 sizeof(struct sbp2_status_block), sizeof(quadlet_t),
836 ~0ULL, ~0ULL);
837 if (!scsi_id->status_fifo_addr) {
838 SBP2_ERR("failed to allocate status FIFO address range");
839 goto failed_alloc;
840 }
841
1da177e4 842 /* Register our host with the SCSI stack. */
a2ef79e1 843 scsi_host = scsi_host_alloc(&scsi_driver_template,
a237f35f 844 sizeof(unsigned long));
1da177e4
LT		 845 if (!scsi_host) {
846 SBP2_ERR("failed to register scsi host");
847 goto failed_alloc;
848 }
849
850 scsi_host->hostdata[0] = (unsigned long)scsi_id;
851
852 if (!scsi_add_host(scsi_host, &ud->device)) {
853 scsi_id->scsi_host = scsi_host;
854 return scsi_id;
855 }
856
857 SBP2_ERR("failed to add scsi host");
858 scsi_host_put(scsi_host);
859
860failed_alloc:
861 sbp2_remove_device(scsi_id);
862 return NULL;
863}
864
1da177e4
LT		 865static void sbp2_host_reset(struct hpsb_host *host)
866{
867 struct sbp2scsi_host_info *hi;
868 struct scsi_id_instance_data *scsi_id;
869
870 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
871
872 if (hi) {
873 list_for_each_entry(scsi_id, &hi->scsi_ids, scsi_list)
874 scsi_block_requests(scsi_id->scsi_host);
875 }
876}
877
1da177e4
LT		 878/*
879 * This function is where we first pull the node unique ids, and then
880 * allocate memory and register a SBP-2 device.
881 */
882static int sbp2_start_device(struct scsi_id_instance_data *scsi_id)
883{
884 struct sbp2scsi_host_info *hi = scsi_id->hi;
146f7262 885 int error;
1da177e4 886
d024ebc6 887 SBP2_DEBUG_ENTER();
1da177e4
LT		 888
889 /* Login FIFO DMA */
890 scsi_id->login_response =
a237f35f
SR		 891 pci_alloc_consistent(hi->host->pdev,
892 sizeof(struct sbp2_login_response),
1da177e4
LT		 893 &scsi_id->login_response_dma);
894 if (!scsi_id->login_response)
895 goto alloc_fail;
896 SBP2_DMA_ALLOC("consistent DMA region for login FIFO");
897
898 /* Query logins ORB DMA */
899 scsi_id->query_logins_orb =
a237f35f
SR		 900 pci_alloc_consistent(hi->host->pdev,
901 sizeof(struct sbp2_query_logins_orb),
1da177e4
LT		 902 &scsi_id->query_logins_orb_dma);
903 if (!scsi_id->query_logins_orb)
904 goto alloc_fail;
905 SBP2_DMA_ALLOC("consistent DMA region for query logins ORB");
906
907 /* Query logins response DMA */
908 scsi_id->query_logins_response =
a237f35f
SR		 909 pci_alloc_consistent(hi->host->pdev,
910 sizeof(struct sbp2_query_logins_response),
1da177e4
LT		 911 &scsi_id->query_logins_response_dma);
912 if (!scsi_id->query_logins_response)
913 goto alloc_fail;
914 SBP2_DMA_ALLOC("consistent DMA region for query logins response");
915
916 /* Reconnect ORB DMA */
917 scsi_id->reconnect_orb =
a237f35f
SR		 918 pci_alloc_consistent(hi->host->pdev,
919 sizeof(struct sbp2_reconnect_orb),
1da177e4
LT		 920 &scsi_id->reconnect_orb_dma);
921 if (!scsi_id->reconnect_orb)
922 goto alloc_fail;
923 SBP2_DMA_ALLOC("consistent DMA region for reconnect ORB");
924
925 /* Logout ORB DMA */
926 scsi_id->logout_orb =
a237f35f
SR		 927 pci_alloc_consistent(hi->host->pdev,
928 sizeof(struct sbp2_logout_orb),
1da177e4
LT		 929 &scsi_id->logout_orb_dma);
930 if (!scsi_id->logout_orb)
931 goto alloc_fail;
932 SBP2_DMA_ALLOC("consistent DMA region for logout ORB");
933
934 /* Login ORB DMA */
935 scsi_id->login_orb =
a237f35f
SR		 936 pci_alloc_consistent(hi->host->pdev,
937 sizeof(struct sbp2_login_orb),
1da177e4 938 &scsi_id->login_orb_dma);
eaceec7f
SR		 939 if (!scsi_id->login_orb)
940 goto alloc_fail;
1da177e4
LT		 941 SBP2_DMA_ALLOC("consistent DMA region for login ORB");
942
943 SBP2_DEBUG("New SBP-2 device inserted, SCSI ID = %x", scsi_id->ud->id);
944
945 /*
946 * Create our command orb pool
947 */
948 if (sbp2util_create_command_orb_pool(scsi_id)) {
949 SBP2_ERR("sbp2util_create_command_orb_pool failed!");
950 sbp2_remove_device(scsi_id);
951 return -ENOMEM;
952 }
953
954 /* Schedule a timeout here. The reason is that we may be so close
955 * to a bus reset, that the device is not available for logins.
956 * This can happen when the bus reset is caused by the host
957 * connected to the sbp2 device being removed. That host would
958 * have a certain amount of time to relogin before the sbp2 device
959 * allows someone else to login instead. One second makes sense. */
960 msleep_interruptible(1000);
961 if (signal_pending(current)) {
1da177e4
LT		 962 sbp2_remove_device(scsi_id);
963 return -EINTR;
964 }
a237f35f 965
1da177e4
LT		 966 /*
967 * Login to the sbp-2 device
968 */
969 if (sbp2_login_device(scsi_id)) {
970 /* Login failed, just remove the device. */
971 sbp2_remove_device(scsi_id);
972 return -EBUSY;
973 }
974
975 /*
976 * Set max retries to something large on the device
977 */
978 sbp2_set_busy_timeout(scsi_id);
979
980 /*
981 * Do a SBP-2 fetch agent reset
982 */
983 sbp2_agent_reset(scsi_id, 1);
984
985 /*
986 * Get the max speed and packet size that we can use
987 */
988 sbp2_max_speed_and_size(scsi_id);
989
990 /* Add this device to the scsi layer now */
146f7262
JB		 991 error = scsi_add_device(scsi_id->scsi_host, 0, scsi_id->ud->id, 0);
992 if (error) {
1da177e4 993 SBP2_ERR("scsi_add_device failed");
dc3edd54
SR		 994 sbp2_logout_device(scsi_id);
995 sbp2_remove_device(scsi_id);
146f7262 996 return error;
1da177e4
LT		 997 }
998
999 return 0;
eaceec7f
SR		 1000
1001alloc_fail:
1002 SBP2_ERR("Could not allocate memory for scsi_id");
1003 sbp2_remove_device(scsi_id);
1004 return -ENOMEM;
1da177e4
LT		 1005}
1006
1007/*
1008 * This function removes an sbp2 device from the sbp2scsi_host_info struct.
1009 */
1010static void sbp2_remove_device(struct scsi_id_instance_data *scsi_id)
1011{
1012 struct sbp2scsi_host_info *hi;
1013
d024ebc6 1014 SBP2_DEBUG_ENTER();
1da177e4
LT		 1015
1016 if (!scsi_id)
1017 return;
1018
1019 hi = scsi_id->hi;
1020
1021 /* This will remove our scsi device aswell */
1022 if (scsi_id->scsi_host) {
1023 scsi_remove_host(scsi_id->scsi_host);
1024 scsi_host_put(scsi_id->scsi_host);
1025 }
1026
1027 sbp2util_remove_command_orb_pool(scsi_id);
1028
1029 list_del(&scsi_id->scsi_list);
1030
1031 if (scsi_id->login_response) {
1032 pci_free_consistent(hi->host->pdev,
1033 sizeof(struct sbp2_login_response),
1034 scsi_id->login_response,
1035 scsi_id->login_response_dma);
1036 SBP2_DMA_FREE("single login FIFO");
1037 }
1038
1039 if (scsi_id->login_orb) {
1040 pci_free_consistent(hi->host->pdev,
1041 sizeof(struct sbp2_login_orb),
1042 scsi_id->login_orb,
1043 scsi_id->login_orb_dma);
1044 SBP2_DMA_FREE("single login ORB");
1045 }
1046
1047 if (scsi_id->reconnect_orb) {
1048 pci_free_consistent(hi->host->pdev,
1049 sizeof(struct sbp2_reconnect_orb),
1050 scsi_id->reconnect_orb,
1051 scsi_id->reconnect_orb_dma);
1052 SBP2_DMA_FREE("single reconnect orb");
1053 }
1054
1055 if (scsi_id->logout_orb) {
1056 pci_free_consistent(hi->host->pdev,
1057 sizeof(struct sbp2_logout_orb),
1058 scsi_id->logout_orb,
1059 scsi_id->logout_orb_dma);
1060 SBP2_DMA_FREE("single logout orb");
1061 }
1062
1063 if (scsi_id->query_logins_orb) {
1064 pci_free_consistent(hi->host->pdev,
1065 sizeof(struct sbp2_query_logins_orb),
1066 scsi_id->query_logins_orb,
1067 scsi_id->query_logins_orb_dma);
1068 SBP2_DMA_FREE("single query logins orb");
1069 }
1070
1071 if (scsi_id->query_logins_response) {
1072 pci_free_consistent(hi->host->pdev,
1073 sizeof(struct sbp2_query_logins_response),
1074 scsi_id->query_logins_response,
1075 scsi_id->query_logins_response_dma);
1076 SBP2_DMA_FREE("single query logins data");
1077 }
1078
35bdddb8
SR		 1079 if (scsi_id->status_fifo_addr)
1080 hpsb_unregister_addrspace(&sbp2_highlevel, hi->host,
1081 scsi_id->status_fifo_addr);
1082
1da177e4
LT		 1083 scsi_id->ud->device.driver_data = NULL;
1084
147830f2
SR		 1085 if (hi)
1086 module_put(hi->host->driver->owner);
1087
1da177e4
LT		 1088 SBP2_DEBUG("SBP-2 device removed, SCSI ID = %d", scsi_id->ud->id);
1089
1090 kfree(scsi_id);
1091}
1092
1093#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
1094/*
1095 * This function deals with physical dma write requests (for adapters that do not support
1096 * physical dma in hardware). Mostly just here for debugging...
1097 */
a237f35f
SR		 1098static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid,
1099 int destid, quadlet_t *data, u64 addr,
1100 size_t length, u16 flags)
1da177e4
LT		 1101{
1102
a237f35f
SR		 1103 /*
1104 * Manually put the data in the right place.
1105 */
1106 memcpy(bus_to_virt((u32) addr), data, length);
1107 sbp2util_packet_dump(data, length, "sbp2 phys dma write by device",
1108 (u32) addr);
1109 return RCODE_COMPLETE;
1da177e4
LT		 1110}
1111
1112/*
1113 * This function deals with physical dma read requests (for adapters that do not support
1114 * physical dma in hardware). Mostly just here for debugging...
1115 */
a237f35f
SR		 1116static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid,
1117 quadlet_t *data, u64 addr, size_t length,
1118 u16 flags)
1da177e4
LT		 1119{
1120
a237f35f
SR		 1121 /*
1122 * Grab data from memory and send a read response.
1123 */
1124 memcpy(data, bus_to_virt((u32) addr), length);
1125 sbp2util_packet_dump(data, length, "sbp2 phys dma read by device",
1126 (u32) addr);
1127 return RCODE_COMPLETE;
1da177e4
LT		 1128}
1129#endif
1130
1da177e4
LT		 1131/**************************************
1132 * SBP-2 protocol related section
1133 **************************************/
1134
1da177e4
LT		 1135/*
1136 * This function queries the device for the maximum concurrent logins it
1137 * supports.
1138 */
1139static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id)
1140{
1141 struct sbp2scsi_host_info *hi = scsi_id->hi;
1142 quadlet_t data[2];
1143 int max_logins;
1144 int active_logins;
1145
d024ebc6 1146 SBP2_DEBUG_ENTER();
1da177e4
LT		 1147
1148 scsi_id->query_logins_orb->reserved1 = 0x0;
1149 scsi_id->query_logins_orb->reserved2 = 0x0;
1150
1151 scsi_id->query_logins_orb->query_response_lo = scsi_id->query_logins_response_dma;
1152 scsi_id->query_logins_orb->query_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
1da177e4
LT		 1153
1154 scsi_id->query_logins_orb->lun_misc = ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST);
1155 scsi_id->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1);
e309fc6d 1156 scsi_id->query_logins_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_lun);
1da177e4
LT		 1157
1158 scsi_id->query_logins_orb->reserved_resp_length =
1159 ORB_SET_QUERY_LOGINS_RESP_LENGTH(sizeof(struct sbp2_query_logins_response));
1da177e4 1160
35bdddb8
SR		 1161 scsi_id->query_logins_orb->status_fifo_hi =
1162 ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
1163 scsi_id->query_logins_orb->status_fifo_lo =
1164 ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr);
1da177e4
LT		 1165
1166 sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb));
1167
1da177e4
LT		 1168 sbp2util_packet_dump(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb),
1169 "sbp2 query logins orb", scsi_id->query_logins_orb_dma);
1170
1171 memset(scsi_id->query_logins_response, 0, sizeof(struct sbp2_query_logins_response));
1172 memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
1173
1da177e4
LT		 1174 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1175 data[1] = scsi_id->query_logins_orb_dma;
1176 sbp2util_cpu_to_be32_buffer(data, 8);
1177
1178 atomic_set(&scsi_id->sbp2_login_complete, 0);
1179
1da177e4 1180 hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8);
1da177e4
LT		 1181
1182 if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 2*HZ)) {
1183 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
a237f35f 1184 return -EIO;
1da177e4
LT		 1185 }
1186
1187 if (scsi_id->status_block.ORB_offset_lo != scsi_id->query_logins_orb_dma) {
1188 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
a237f35f 1189 return -EIO;
1da177e4
LT		 1190 }
1191
1192 if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
1193 STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
1194 STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
1195
1196 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
a237f35f 1197 return -EIO;
1da177e4
LT		 1198 }
1199
1200 sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_response, sizeof(struct sbp2_query_logins_response));
1201
1202 SBP2_DEBUG("length_max_logins = %x",
1203 (unsigned int)scsi_id->query_logins_response->length_max_logins);
1204
1205 SBP2_DEBUG("Query logins to SBP-2 device successful");
1206
1207 max_logins = RESPONSE_GET_MAX_LOGINS(scsi_id->query_logins_response->length_max_logins);
1208 SBP2_DEBUG("Maximum concurrent logins supported: %d", max_logins);
1209
1210 active_logins = RESPONSE_GET_ACTIVE_LOGINS(scsi_id->query_logins_response->length_max_logins);
1211 SBP2_DEBUG("Number of active logins: %d", active_logins);
1212
1213 if (active_logins >= max_logins) {
a237f35f 1214 return -EIO;
1da177e4
LT		 1215 }
1216
1217 return 0;
1218}
1219
1220/*
1221 * This function is called in order to login to a particular SBP-2 device,
1222 * after a bus reset.
1223 */
1224static int sbp2_login_device(struct scsi_id_instance_data *scsi_id)
1225{
1226 struct sbp2scsi_host_info *hi = scsi_id->hi;
1227 quadlet_t data[2];
1228
d024ebc6 1229 SBP2_DEBUG_ENTER();
1da177e4
LT		 1230
1231 if (!scsi_id->login_orb) {
d024ebc6 1232 SBP2_DEBUG("%s: login_orb not alloc'd!", __FUNCTION__);
a237f35f 1233 return -EIO;
1da177e4
LT		 1234 }
1235
1236 if (!exclusive_login) {
1237 if (sbp2_query_logins(scsi_id)) {
1238 SBP2_INFO("Device does not support any more concurrent logins");
a237f35f 1239 return -EIO;
1da177e4
LT		 1240 }
1241 }
1242
1243 /* Set-up login ORB, assume no password */
1244 scsi_id->login_orb->password_hi = 0;
1245 scsi_id->login_orb->password_lo = 0;
1da177e4
LT		 1246
1247 scsi_id->login_orb->login_response_lo = scsi_id->login_response_dma;
1248 scsi_id->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
1da177e4
LT		 1249
1250 scsi_id->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST);
1251 scsi_id->login_orb->lun_misc |= ORB_SET_RECONNECT(0); /* One second reconnect time */
1252 scsi_id->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(exclusive_login); /* Exclusive access to device */
1253 scsi_id->login_orb->lun_misc |= ORB_SET_NOTIFY(1); /* Notify us of login complete */
e309fc6d 1254 scsi_id->login_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_lun);
1da177e4
LT		 1255
1256 scsi_id->login_orb->passwd_resp_lengths =
1257 ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response));
1da177e4 1258
35bdddb8
SR		 1259 scsi_id->login_orb->status_fifo_hi =
1260 ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
1261 scsi_id->login_orb->status_fifo_lo =
1262 ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr);
1da177e4 1263
1da177e4
LT		 1264 sbp2util_cpu_to_be32_buffer(scsi_id->login_orb, sizeof(struct sbp2_login_orb));
1265
1da177e4
LT		 1266 sbp2util_packet_dump(scsi_id->login_orb, sizeof(struct sbp2_login_orb),
1267 "sbp2 login orb", scsi_id->login_orb_dma);
1268
1da177e4
LT		 1269 memset(scsi_id->login_response, 0, sizeof(struct sbp2_login_response));
1270 memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
1271
1da177e4
LT		 1272 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1273 data[1] = scsi_id->login_orb_dma;
1274 sbp2util_cpu_to_be32_buffer(data, 8);
1275
1276 atomic_set(&scsi_id->sbp2_login_complete, 0);
1277
1da177e4 1278 hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8);
1da177e4
LT		 1279
1280 /*
1281 * Wait for login status (up to 20 seconds)...
1282 */
1283 if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 20*HZ)) {
1284 SBP2_ERR("Error logging into SBP-2 device - login timed-out");
a237f35f 1285 return -EIO;
1da177e4
LT		 1286 }
1287
1288 /*
1289 * Sanity. Make sure status returned matches login orb.
1290 */
1291 if (scsi_id->status_block.ORB_offset_lo != scsi_id->login_orb_dma) {
1292 SBP2_ERR("Error logging into SBP-2 device - login timed-out");
a237f35f 1293 return -EIO;
1da177e4
LT		 1294 }
1295
1296 /*
1297 * Check status
1298 */
1299 if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
1300 STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
1301 STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
1302
1303 SBP2_ERR("Error logging into SBP-2 device - login failed");
a237f35f 1304 return -EIO;
1da177e4
LT		 1305 }
1306
1307 /*
1308 * Byte swap the login response, for use when reconnecting or
1309 * logging out.
1310 */
1311 sbp2util_cpu_to_be32_buffer(scsi_id->login_response, sizeof(struct sbp2_login_response));
1312
1313 /*
1314 * Grab our command block agent address from the login response.
1315 */
1316 SBP2_DEBUG("command_block_agent_hi = %x",
1317 (unsigned int)scsi_id->login_response->command_block_agent_hi);
1318 SBP2_DEBUG("command_block_agent_lo = %x",
1319 (unsigned int)scsi_id->login_response->command_block_agent_lo);
1320
1321 scsi_id->sbp2_command_block_agent_addr =
1322 ((u64)scsi_id->login_response->command_block_agent_hi) << 32;
1323 scsi_id->sbp2_command_block_agent_addr |= ((u64)scsi_id->login_response->command_block_agent_lo);
1324 scsi_id->sbp2_command_block_agent_addr &= 0x0000ffffffffffffULL;
1325
1326 SBP2_INFO("Logged into SBP-2 device");
1327
a237f35f 1328 return 0;
1da177e4
LT		 1329
1330}
1331
1332/*
1333 * This function is called in order to logout from a particular SBP-2
1334 * device, usually called during driver unload.
1335 */
1336static int sbp2_logout_device(struct scsi_id_instance_data *scsi_id)
1337{
1338 struct sbp2scsi_host_info *hi = scsi_id->hi;
1339 quadlet_t data[2];
1340 int error;
1341
d024ebc6 1342 SBP2_DEBUG_ENTER();
1da177e4
LT		 1343
1344 /*
1345 * Set-up logout ORB
1346 */
1347 scsi_id->logout_orb->reserved1 = 0x0;
1348 scsi_id->logout_orb->reserved2 = 0x0;
1349 scsi_id->logout_orb->reserved3 = 0x0;
1350 scsi_id->logout_orb->reserved4 = 0x0;
1351
1352 scsi_id->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST);
1353 scsi_id->logout_orb->login_ID_misc |= ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID);
1354
1355 /* Notify us when complete */
1356 scsi_id->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1357
1358 scsi_id->logout_orb->reserved5 = 0x0;
35bdddb8
SR		 1359 scsi_id->logout_orb->status_fifo_hi =
1360 ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
1361 scsi_id->logout_orb->status_fifo_lo =
1362 ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr);
1da177e4
LT		 1363
1364 /*
1365 * Byte swap ORB if necessary
1366 */
1367 sbp2util_cpu_to_be32_buffer(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb));
1368
1369 sbp2util_packet_dump(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb),
1370 "sbp2 logout orb", scsi_id->logout_orb_dma);
1371
1372 /*
1373 * Ok, let's write to the target's management agent register
1374 */
1375 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1376 data[1] = scsi_id->logout_orb_dma;
1377 sbp2util_cpu_to_be32_buffer(data, 8);
1378
1379 atomic_set(&scsi_id->sbp2_login_complete, 0);
1380
1381 error = hpsb_node_write(scsi_id->ne,
a237f35f 1382 scsi_id->sbp2_management_agent_addr, data, 8);
1da177e4
LT		 1383 if (error)
1384 return error;
1385
1386 /* Wait for device to logout...1 second. */
1387 if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ))
1388 return -EIO;
1389
1390 SBP2_INFO("Logged out of SBP-2 device");
1391
a237f35f 1392 return 0;
1da177e4
LT		 1393
1394}
1395
1396/*
1397 * This function is called in order to reconnect to a particular SBP-2
1398 * device, after a bus reset.
1399 */
1400static int sbp2_reconnect_device(struct scsi_id_instance_data *scsi_id)
1401{
1402 struct sbp2scsi_host_info *hi = scsi_id->hi;
1403 quadlet_t data[2];
1404 int error;
1405
d024ebc6 1406 SBP2_DEBUG_ENTER();
1da177e4
LT		 1407
1408 /*
1409 * Set-up reconnect ORB
1410 */
1411 scsi_id->reconnect_orb->reserved1 = 0x0;
1412 scsi_id->reconnect_orb->reserved2 = 0x0;
1413 scsi_id->reconnect_orb->reserved3 = 0x0;
1414 scsi_id->reconnect_orb->reserved4 = 0x0;
1415
1416 scsi_id->reconnect_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST);
1417 scsi_id->reconnect_orb->login_ID_misc |=
1418 ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID);
1419
1420 /* Notify us when complete */
1421 scsi_id->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1422
1423 scsi_id->reconnect_orb->reserved5 = 0x0;
35bdddb8
SR		 1424 scsi_id->reconnect_orb->status_fifo_hi =
1425 ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
1426 scsi_id->reconnect_orb->status_fifo_lo =
1427 ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr);
1da177e4
LT		 1428
1429 /*
1430 * Byte swap ORB if necessary
1431 */
1432 sbp2util_cpu_to_be32_buffer(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb));
1433
1434 sbp2util_packet_dump(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb),
1435 "sbp2 reconnect orb", scsi_id->reconnect_orb_dma);
1436
1437 /*
1438 * Initialize status fifo
1439 */
1440 memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
1441
1442 /*
1443 * Ok, let's write to the target's management agent register
1444 */
1445 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1446 data[1] = scsi_id->reconnect_orb_dma;
1447 sbp2util_cpu_to_be32_buffer(data, 8);
1448
1449 atomic_set(&scsi_id->sbp2_login_complete, 0);
1450
1451 error = hpsb_node_write(scsi_id->ne,
a237f35f 1452 scsi_id->sbp2_management_agent_addr, data, 8);
1da177e4
LT		 1453 if (error)
1454 return error;
1455
1456 /*
1457 * Wait for reconnect status (up to 1 second)...
1458 */
1459 if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ)) {
1460 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out");
a237f35f 1461 return -EIO;
1da177e4
LT		 1462 }
1463
1464 /*
1465 * Sanity. Make sure status returned matches reconnect orb.
1466 */
1467 if (scsi_id->status_block.ORB_offset_lo != scsi_id->reconnect_orb_dma) {
1468 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out");
a237f35f 1469 return -EIO;
1da177e4
LT		 1470 }
1471
1472 /*
1473 * Check status
1474 */
1475 if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
1476 STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
1477 STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
1478
1479 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect failed");
a237f35f 1480 return -EIO;
1da177e4
LT		 1481 }
1482
1483 HPSB_DEBUG("Reconnected to SBP-2 device");
1484
a237f35f 1485 return 0;
1da177e4
LT		 1486
1487}
1488
1489/*
1490 * This function is called in order to set the busy timeout (number of
1491 * retries to attempt) on the sbp2 device.
1492 */
1493static int sbp2_set_busy_timeout(struct scsi_id_instance_data *scsi_id)
1494{
1495 quadlet_t data;
1496
d024ebc6 1497 SBP2_DEBUG_ENTER();
1da177e4 1498
1da177e4 1499 data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE);
d024ebc6
SR		 1500 if (hpsb_node_write(scsi_id->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4))
1501 SBP2_ERR("%s error", __FUNCTION__);
a237f35f 1502 return 0;
1da177e4
LT		 1503}
1504
1da177e4
LT		 1505/*
1506 * This function is called to parse sbp2 device's config rom unit
1507 * directory. Used to determine things like sbp2 management agent offset,
1508 * and command set used (SCSI or RBC).
1509 */
1510static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id,
1511 struct unit_directory *ud)
1512{
1513 struct csr1212_keyval *kv;
1514 struct csr1212_dentry *dentry;
1515 u64 management_agent_addr;
1516 u32 command_set_spec_id, command_set, unit_characteristics,
24d3bf88
SR		 1517 firmware_revision;
1518 unsigned workarounds;
1da177e4
LT		 1519 int i;
1520
d024ebc6 1521 SBP2_DEBUG_ENTER();
1da177e4
LT		 1522
1523 management_agent_addr = 0x0;
1524 command_set_spec_id = 0x0;
1525 command_set = 0x0;
1526 unit_characteristics = 0x0;
1527 firmware_revision = 0x0;
1528
1529 /* Handle different fields in the unit directory, based on keys */
1530 csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) {
1531 switch (kv->key.id) {
1532 case CSR1212_KV_ID_DEPENDENT_INFO:
1533 if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET) {
1534 /* Save off the management agent address */
1535 management_agent_addr =
a237f35f
SR		 1536 CSR1212_REGISTER_SPACE_BASE +
1537 (kv->value.csr_offset << 2);
1da177e4
LT		 1538
1539 SBP2_DEBUG("sbp2_management_agent_addr = %x",
a237f35f 1540 (unsigned int)management_agent_addr);
1da177e4 1541 } else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
a237f35f
SR		 1542 scsi_id->sbp2_lun =
1543 ORB_SET_LUN(kv->value.immediate);
1da177e4
LT		 1544 }
1545 break;
1546
1547 case SBP2_COMMAND_SET_SPEC_ID_KEY:
1548 /* Command spec organization */
1549 command_set_spec_id = kv->value.immediate;
1550 SBP2_DEBUG("sbp2_command_set_spec_id = %x",
a237f35f 1551 (unsigned int)command_set_spec_id);
1da177e4
LT		 1552 break;
1553
1554 case SBP2_COMMAND_SET_KEY:
1555 /* Command set used by sbp2 device */
1556 command_set = kv->value.immediate;
1557 SBP2_DEBUG("sbp2_command_set = %x",
a237f35f 1558 (unsigned int)command_set);
1da177e4
LT		 1559 break;
1560
1561 case SBP2_UNIT_CHARACTERISTICS_KEY:
1562 /*
1563 * Unit characterisitcs (orb related stuff
1564 * that I'm not yet paying attention to)
1565 */
1566 unit_characteristics = kv->value.immediate;
1567 SBP2_DEBUG("sbp2_unit_characteristics = %x",
a237f35f 1568 (unsigned int)unit_characteristics);
1da177e4
LT		 1569 break;
1570
1571 case SBP2_FIRMWARE_REVISION_KEY:
1572 /* Firmware revision */
1573 firmware_revision = kv->value.immediate;
24d3bf88
SR		 1574 SBP2_DEBUG("sbp2_firmware_revision = %x",
1575 (unsigned int)firmware_revision);
1da177e4
LT		 1576 break;
1577
1578 default:
1579 break;
1580 }
1581 }
1582
24d3bf88
SR		 1583 workarounds = sbp2_default_workarounds;
1584 if (force_inquiry_hack) {
1585 SBP2_WARN("force_inquiry_hack is deprecated. "
1586 "Use parameter 'workarounds' instead.");
1587 workarounds |= SBP2_WORKAROUND_INQUIRY_36;
1588 }
1da177e4 1589
24d3bf88 1590 for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) {
e9a1c52c
SR		 1591 if (sbp2_workarounds_table[i].firmware_revision &&
1592 sbp2_workarounds_table[i].firmware_revision !=
24d3bf88
SR		 1593 (firmware_revision & 0xffff00))
1594 continue;
e9a1c52c
SR		 1595 if (sbp2_workarounds_table[i].model_id &&
1596 sbp2_workarounds_table[i].model_id != ud->model_id)
1597 continue;
24d3bf88
SR		 1598 workarounds |= sbp2_workarounds_table[i].workarounds;
1599 break;
1da177e4
LT		 1600 }
1601
24d3bf88 1602 if (workarounds)
e9a1c52c
SR		 1603 SBP2_INFO("Workarounds for node " NODE_BUS_FMT ": 0x%x "
1604 "(firmware_revision 0x%06x, vendor_id 0x%06x,"
1605 " model_id 0x%06x)",
24d3bf88 1606 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid),
e9a1c52c
SR		 1607 workarounds, firmware_revision,
1608 ud->vendor_id ? ud->vendor_id : ud->ne->vendor_id,
1609 ud->model_id);
24d3bf88
SR		 1610
1611 /* We would need one SCSI host template for each target to adjust
1612 * max_sectors on the fly, therefore warn only. */
1613 if (workarounds & SBP2_WORKAROUND_128K_MAX_TRANS &&
1614 (max_sectors * 512) > (128 * 1024))
1615 SBP2_WARN("Node " NODE_BUS_FMT ": Bridge only supports 128KB "
1616 "max transfer size. WARNING: Current max_sectors "
1617 "setting is larger than 128KB (%d sectors)",
1618 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid),
1619 max_sectors);
1620
1da177e4
LT		 1621 /* If this is a logical unit directory entry, process the parent
1622 * to get the values. */
1623 if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) {
1624 struct unit_directory *parent_ud =
1625 container_of(ud->device.parent, struct unit_directory, device);
1626 sbp2_parse_unit_directory(scsi_id, parent_ud);
1627 } else {
1628 scsi_id->sbp2_management_agent_addr = management_agent_addr;
1629 scsi_id->sbp2_command_set_spec_id = command_set_spec_id;
1630 scsi_id->sbp2_command_set = command_set;
1631 scsi_id->sbp2_unit_characteristics = unit_characteristics;
1632 scsi_id->sbp2_firmware_revision = firmware_revision;
1633 scsi_id->workarounds = workarounds;
1634 if (ud->flags & UNIT_DIRECTORY_HAS_LUN)
e309fc6d 1635 scsi_id->sbp2_lun = ORB_SET_LUN(ud->lun);
1da177e4
LT		 1636 }
1637}
1638
1639/*
1640 * This function is called in order to determine the max speed and packet
1641 * size we can use in our ORBs. Note, that we (the driver and host) only
1642 * initiate the transaction. The SBP-2 device actually transfers the data
1643 * (by reading from the DMA area we tell it). This means that the SBP-2
1644 * device decides the actual maximum data it can transfer. We just tell it
1645 * the speed that it needs to use, and the max_rec the host supports, and
1646 * it takes care of the rest.
1647 */
1648static int sbp2_max_speed_and_size(struct scsi_id_instance_data *scsi_id)
1649{
1650 struct sbp2scsi_host_info *hi = scsi_id->hi;
1651
d024ebc6 1652 SBP2_DEBUG_ENTER();
1da177e4
LT		 1653
1654 /* Initial setting comes from the hosts speed map */
a237f35f
SR		 1655 scsi_id->speed_code =
1656 hi->host->speed_map[NODEID_TO_NODE(hi->host->node_id) * 64 +
1657 NODEID_TO_NODE(scsi_id->ne->nodeid)];
1da177e4
LT		 1658
1659 /* Bump down our speed if the user requested it */
1660 if (scsi_id->speed_code > max_speed) {
1661 scsi_id->speed_code = max_speed;
1662 SBP2_ERR("Forcing SBP-2 max speed down to %s",
1663 hpsb_speedto_str[scsi_id->speed_code]);
1664 }
1665
1666 /* Payload size is the lesser of what our speed supports and what
1667 * our host supports. */
a237f35f
SR		 1668 scsi_id->max_payload_size =
1669 min(sbp2_speedto_max_payload[scsi_id->speed_code],
1670 (u8) (hi->host->csr.max_rec - 1));
1da177e4
LT		 1671
1672 HPSB_DEBUG("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]",
1673 NODE_BUS_ARGS(hi->host, scsi_id->ne->nodeid),
1674 hpsb_speedto_str[scsi_id->speed_code],
a237f35f 1675 1 << ((u32) scsi_id->max_payload_size + 2));
1da177e4 1676
a237f35f 1677 return 0;
1da177e4
LT		 1678}
1679
1680/*
1681 * This function is called in order to perform a SBP-2 agent reset.
1682 */
1683static int sbp2_agent_reset(struct scsi_id_instance_data *scsi_id, int wait)
1684{
1685 quadlet_t data;
1686 u64 addr;
1687 int retval;
1688
d024ebc6 1689 SBP2_DEBUG_ENTER();
1da177e4 1690
1da177e4
LT		 1691 data = ntohl(SBP2_AGENT_RESET_DATA);
1692 addr = scsi_id->sbp2_command_block_agent_addr + SBP2_AGENT_RESET_OFFSET;
1693
1694 if (wait)
1695 retval = hpsb_node_write(scsi_id->ne, addr, &data, 4);
1696 else
1697 retval = sbp2util_node_write_no_wait(scsi_id->ne, addr, &data, 4);
1698
1699 if (retval < 0) {
1700 SBP2_ERR("hpsb_node_write failed.\n");
1701 return -EIO;
1702 }
1703
1704 /*
1705 * Need to make sure orb pointer is written on next command
1706 */
1707 scsi_id->last_orb = NULL;
1708
a237f35f 1709 return 0;
1da177e4
LT		 1710}
1711
cf8d2c09
SR		 1712static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb,
1713 struct sbp2scsi_host_info *hi,
1714 struct sbp2_command_info *command,
1715 unsigned int scsi_use_sg,
1716 struct scatterlist *sgpnt,
1717 u32 orb_direction,
1718 enum dma_data_direction dma_dir)
1719{
1720 command->dma_dir = dma_dir;
1721 orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1722 orb->misc |= ORB_SET_DIRECTION(orb_direction);
1723
1724 /* Special case if only one element (and less than 64KB in size) */
1725 if ((scsi_use_sg == 1) &&
1726 (sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) {
1727
1728 SBP2_DEBUG("Only one s/g element");
1729 command->dma_size = sgpnt[0].length;
1730 command->dma_type = CMD_DMA_PAGE;
1731 command->cmd_dma = pci_map_page(hi->host->pdev,
1732 sgpnt[0].page,
1733 sgpnt[0].offset,
1734 command->dma_size,
1735 command->dma_dir);
1736 SBP2_DMA_ALLOC("single page scatter element");
1737
1738 orb->data_descriptor_lo = command->cmd_dma;
1739 orb->misc |= ORB_SET_DATA_SIZE(command->dma_size);
1740
1741 } else {
1742 struct sbp2_unrestricted_page_table *sg_element =
1743 &command->scatter_gather_element[0];
1744 u32 sg_count, sg_len;
1745 dma_addr_t sg_addr;
1746 int i, count = pci_map_sg(hi->host->pdev, sgpnt, scsi_use_sg,
1747 dma_dir);
1748
1749 SBP2_DMA_ALLOC("scatter list");
1750
1751 command->dma_size = scsi_use_sg;
1752 command->sge_buffer = sgpnt;
1753
1754 /* use page tables (s/g) */
1755 orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1756 orb->data_descriptor_lo = command->sge_dma;
1757
1758 /*
1759 * Loop through and fill out our sbp-2 page tables
1760 * (and split up anything too large)
1761 */
1762 for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) {
1763 sg_len = sg_dma_len(sgpnt);
1764 sg_addr = sg_dma_address(sgpnt);
1765 while (sg_len) {
1766 sg_element[sg_count].segment_base_lo = sg_addr;
1767 if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
1768 sg_element[sg_count].length_segment_base_hi =
1769 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
1770 sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
1771 sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
1772 } else {
1773 sg_element[sg_count].length_segment_base_hi =
1774 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
1775 sg_len = 0;
1776 }
1777 sg_count++;
1778 }
1779 }
1780
1781 /* Number of page table (s/g) elements */
1782 orb->misc |= ORB_SET_DATA_SIZE(sg_count);
1783
1784 sbp2util_packet_dump(sg_element,
1785 (sizeof(struct sbp2_unrestricted_page_table)) * sg_count,
1786 "sbp2 s/g list", command->sge_dma);
1787
1788 /* Byte swap page tables if necessary */
1789 sbp2util_cpu_to_be32_buffer(sg_element,
1790 (sizeof(struct sbp2_unrestricted_page_table)) *
1791 sg_count);
1792 }
1793}
1794
1795static void sbp2_prep_command_orb_no_sg(struct sbp2_command_orb *orb,
1796 struct sbp2scsi_host_info *hi,
1797 struct sbp2_command_info *command,
1798 struct scatterlist *sgpnt,
1799 u32 orb_direction,
1800 unsigned int scsi_request_bufflen,
1801 void *scsi_request_buffer,
1802 enum dma_data_direction dma_dir)
1803{
1804 command->dma_dir = dma_dir;
1805 command->dma_size = scsi_request_bufflen;
1806 command->dma_type = CMD_DMA_SINGLE;
1807 command->cmd_dma = pci_map_single(hi->host->pdev, scsi_request_buffer,
1808 command->dma_size, command->dma_dir);
1809 orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1810 orb->misc |= ORB_SET_DIRECTION(orb_direction);
1811
1812 SBP2_DMA_ALLOC("single bulk");
1813
1814 /*
1815 * Handle case where we get a command w/o s/g enabled (but
1816 * check for transfers larger than 64K)
1817 */
1818 if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) {
1819
1820 orb->data_descriptor_lo = command->cmd_dma;
1821 orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen);
1822
1823 } else {
1824 struct sbp2_unrestricted_page_table *sg_element =
1825 &command->scatter_gather_element[0];
1826 u32 sg_count, sg_len;
1827 dma_addr_t sg_addr;
1828
1829 /*
1830 * Need to turn this into page tables, since the
1831 * buffer is too large.
1832 */
1833 orb->data_descriptor_lo = command->sge_dma;
1834
1835 /* Use page tables (s/g) */
1836 orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1837
1838 /*
1839 * fill out our sbp-2 page tables (and split up
1840 * the large buffer)
1841 */
1842 sg_count = 0;
1843 sg_len = scsi_request_bufflen;
1844 sg_addr = command->cmd_dma;
1845 while (sg_len) {
1846 sg_element[sg_count].segment_base_lo = sg_addr;
1847 if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
1848 sg_element[sg_count].length_segment_base_hi =
1849 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
1850 sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
1851 sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
1852 } else {
1853 sg_element[sg_count].length_segment_base_hi =
1854 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
1855 sg_len = 0;
1856 }
1857 sg_count++;
1858 }
1859
1860 /* Number of page table (s/g) elements */
1861 orb->misc |= ORB_SET_DATA_SIZE(sg_count);
1862
1863 sbp2util_packet_dump(sg_element,
1864 (sizeof(struct sbp2_unrestricted_page_table)) * sg_count,
1865 "sbp2 s/g list", command->sge_dma);
1866
1867 /* Byte swap page tables if necessary */
1868 sbp2util_cpu_to_be32_buffer(sg_element,
1869 (sizeof(struct sbp2_unrestricted_page_table)) *
1870 sg_count);
1871 }
1872}
1873
1da177e4
LT		 1874/*
1875 * This function is called to create the actual command orb and s/g list
1876 * out of the scsi command itself.
1877 */
cf8d2c09
SR		 1878static void sbp2_create_command_orb(struct scsi_id_instance_data *scsi_id,
1879 struct sbp2_command_info *command,
1880 unchar *scsi_cmd,
1881 unsigned int scsi_use_sg,
1882 unsigned int scsi_request_bufflen,
1883 void *scsi_request_buffer,
1884 enum dma_data_direction dma_dir)
1da177e4
LT		 1885{
1886 struct sbp2scsi_host_info *hi = scsi_id->hi;
a237f35f 1887 struct scatterlist *sgpnt = (struct scatterlist *)scsi_request_buffer;
1da177e4 1888 struct sbp2_command_orb *command_orb = &command->command_orb;
cf8d2c09 1889 u32 orb_direction;
1da177e4
LT		 1890
1891 /*
1892 * Set-up our command ORB..
1893 *
1894 * NOTE: We're doing unrestricted page tables (s/g), as this is
1895 * best performance (at least with the devices I have). This means
1896 * that data_size becomes the number of s/g elements, and
1897 * page_size should be zero (for unrestricted).
1898 */
1899 command_orb->next_ORB_hi = ORB_SET_NULL_PTR(1);
1900 command_orb->next_ORB_lo = 0x0;
1901 command_orb->misc = ORB_SET_MAX_PAYLOAD(scsi_id->max_payload_size);
1902 command_orb->misc |= ORB_SET_SPEED(scsi_id->speed_code);
a237f35f 1903 command_orb->misc |= ORB_SET_NOTIFY(1); /* Notify us when complete */
1da177e4 1904
43863eba 1905 if (dma_dir == DMA_NONE)
a237f35f 1906 orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
43863eba 1907 else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen)
a237f35f 1908 orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA;
43863eba 1909 else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen)
a237f35f 1910 orb_direction = ORB_DIRECTION_READ_FROM_MEDIA;
43863eba
SR		 1911 else {
1912 SBP2_WARN("Falling back to DMA_NONE");
1913 orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
1da177e4
LT		 1914 }
1915
cf8d2c09 1916 /* Set-up our pagetable stuff */
1da177e4 1917 if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) {
1da177e4 1918 SBP2_DEBUG("No data transfer");
1da177e4
LT		 1919 command_orb->data_descriptor_hi = 0x0;
1920 command_orb->data_descriptor_lo = 0x0;
1921 command_orb->misc |= ORB_SET_DIRECTION(1);
1da177e4 1922 } else if (scsi_use_sg) {
1da177e4 1923 SBP2_DEBUG("Use scatter/gather");
cf8d2c09
SR		 1924 sbp2_prep_command_orb_sg(command_orb, hi, command, scsi_use_sg,
1925 sgpnt, orb_direction, dma_dir);
1da177e4 1926 } else {
1da177e4 1927 SBP2_DEBUG("No scatter/gather");
cf8d2c09
SR		 1928 sbp2_prep_command_orb_no_sg(command_orb, hi, command, sgpnt,
1929 orb_direction, scsi_request_bufflen,
1930 scsi_request_buffer, dma_dir);
1da177e4
LT		 1931 }
1932
cf8d2c09 1933 /* Byte swap command ORB if necessary */
1da177e4
LT		 1934 sbp2util_cpu_to_be32_buffer(command_orb, sizeof(struct sbp2_command_orb));
1935
cf8d2c09 1936 /* Put our scsi command in the command ORB */
1da177e4
LT		 1937 memset(command_orb->cdb, 0, 12);
1938 memcpy(command_orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd));
1da177e4
LT		 1939}
1940
1941/*
1942 * This function is called in order to begin a regular SBP-2 command.
1943 */
1944static int sbp2_link_orb_command(struct scsi_id_instance_data *scsi_id,
1945 struct sbp2_command_info *command)
1946{
1947 struct sbp2scsi_host_info *hi = scsi_id->hi;
1948 struct sbp2_command_orb *command_orb = &command->command_orb;
1949 struct node_entry *ne = scsi_id->ne;
1950 u64 addr;
1951
1952 outstanding_orb_incr;
1953 SBP2_ORB_DEBUG("sending command orb %p, total orbs = %x",
a237f35f 1954 command_orb, global_outstanding_command_orbs);
1da177e4
LT		 1955
1956 pci_dma_sync_single_for_device(hi->host->pdev, command->command_orb_dma,
1957 sizeof(struct sbp2_command_orb),
1958 PCI_DMA_BIDIRECTIONAL);
1959 pci_dma_sync_single_for_device(hi->host->pdev, command->sge_dma,
1960 sizeof(command->scatter_gather_element),
1961 PCI_DMA_BIDIRECTIONAL);
1962 /*
1963 * Check to see if there are any previous orbs to use
1964 */
1965 if (scsi_id->last_orb == NULL) {
1966 quadlet_t data[2];
1967
1968 /*
1969 * Ok, let's write to the target's management agent register
1970 */
1971 addr = scsi_id->sbp2_command_block_agent_addr + SBP2_ORB_POINTER_OFFSET;
1972 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1973 data[1] = command->command_orb_dma;
1974 sbp2util_cpu_to_be32_buffer(data, 8);
1975
1976 SBP2_ORB_DEBUG("write command agent, command orb %p", command_orb);
1977
1978 if (sbp2util_node_write_no_wait(ne, addr, data, 8) < 0) {
1979 SBP2_ERR("sbp2util_node_write_no_wait failed.\n");
1980 return -EIO;
1981 }
1982
1983 SBP2_ORB_DEBUG("write command agent complete");
1984
1985 scsi_id->last_orb = command_orb;
1986 scsi_id->last_orb_dma = command->command_orb_dma;
1987
1988 } else {
1989 quadlet_t data;
1990
1991 /*
1992 * We have an orb already sent (maybe or maybe not
1993 * processed) that we can append this orb to. So do so,
1994 * and ring the doorbell. Have to be very careful
1995 * modifying these next orb pointers, as they are accessed
1996 * both by the sbp2 device and us.
1997 */
1998 scsi_id->last_orb->next_ORB_lo =
a237f35f 1999 cpu_to_be32(command->command_orb_dma);
1da177e4
LT		 2000 /* Tells hardware that this pointer is valid */
2001 scsi_id->last_orb->next_ORB_hi = 0x0;
a237f35f
SR		 2002 pci_dma_sync_single_for_device(hi->host->pdev,
2003 scsi_id->last_orb_dma,
1da177e4
LT		 2004 sizeof(struct sbp2_command_orb),
2005 PCI_DMA_BIDIRECTIONAL);
2006
2007 /*
2008 * Ring the doorbell
2009 */
2010 data = cpu_to_be32(command->command_orb_dma);
2011 addr = scsi_id->sbp2_command_block_agent_addr + SBP2_DOORBELL_OFFSET;
2012
2013 SBP2_ORB_DEBUG("ring doorbell, command orb %p", command_orb);
2014
2015 if (sbp2util_node_write_no_wait(ne, addr, &data, 4) < 0) {
2016 SBP2_ERR("sbp2util_node_write_no_wait failed");
a237f35f 2017 return -EIO;
1da177e4
LT		 2018 }
2019
2020 scsi_id->last_orb = command_orb;
2021 scsi_id->last_orb_dma = command->command_orb_dma;
2022
2023 }
a237f35f 2024 return 0;
1da177e4
LT		 2025}
2026
2027/*
2028 * This function is called in order to begin a regular SBP-2 command.
2029 */
2030static int sbp2_send_command(struct scsi_id_instance_data *scsi_id,
2031 struct scsi_cmnd *SCpnt,
2032 void (*done)(struct scsi_cmnd *))
2033{
2034 unchar *cmd = (unchar *) SCpnt->cmnd;
2035 unsigned int request_bufflen = SCpnt->request_bufflen;
2036 struct sbp2_command_info *command;
2037
d024ebc6 2038 SBP2_DEBUG_ENTER();
1da177e4
LT		 2039 SBP2_DEBUG("SCSI transfer size = %x", request_bufflen);
2040 SBP2_DEBUG("SCSI s/g elements = %x", (unsigned int)SCpnt->use_sg);
2041
2042 /*
2043 * Allocate a command orb and s/g structure
2044 */
2045 command = sbp2util_allocate_command_orb(scsi_id, SCpnt, done);
2046 if (!command) {
a237f35f 2047 return -EIO;
1da177e4
LT		 2048 }
2049
1da177e4
LT		 2050 /*
2051 * Now actually fill in the comamnd orb and sbp2 s/g list
2052 */
2053 sbp2_create_command_orb(scsi_id, command, cmd, SCpnt->use_sg,
2054 request_bufflen, SCpnt->request_buffer,
2055 SCpnt->sc_data_direction);
1da177e4
LT		 2056
2057 sbp2util_packet_dump(&command->command_orb, sizeof(struct sbp2_command_orb),
2058 "sbp2 command orb", command->command_orb_dma);
2059
2060 /*
2061 * Initialize status fifo
2062 */
2063 memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
2064
2065 /*
2066 * Link up the orb, and ring the doorbell if needed
2067 */
2068 sbp2_link_orb_command(scsi_id, command);
2069
a237f35f 2070 return 0;
1da177e4
LT		 2071}
2072
1da177e4
LT		 2073/*
2074 * Translates SBP-2 status into SCSI sense data for check conditions
2075 */
2076static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, unchar *sense_data)
2077{
d024ebc6 2078 SBP2_DEBUG_ENTER();
1da177e4
LT		 2079
2080 /*
2081 * Ok, it's pretty ugly... ;-)
2082 */
2083 sense_data[0] = 0x70;
2084 sense_data[1] = 0x0;
2085 sense_data[2] = sbp2_status[9];
2086 sense_data[3] = sbp2_status[12];
2087 sense_data[4] = sbp2_status[13];
2088 sense_data[5] = sbp2_status[14];
2089 sense_data[6] = sbp2_status[15];
2090 sense_data[7] = 10;
2091 sense_data[8] = sbp2_status[16];
2092 sense_data[9] = sbp2_status[17];
2093 sense_data[10] = sbp2_status[18];
2094 sense_data[11] = sbp2_status[19];
2095 sense_data[12] = sbp2_status[10];
2096 sense_data[13] = sbp2_status[11];
2097 sense_data[14] = sbp2_status[20];
2098 sense_data[15] = sbp2_status[21];
2099
a237f35f 2100 return sbp2_status[8] & 0x3f; /* return scsi status */
1da177e4
LT		 2101}
2102
2103/*
2104 * This function is called after a command is completed, in order to do any necessary SBP-2
2105 * response data translations for the SCSI stack
2106 */
a237f35f 2107static void sbp2_check_sbp2_response(struct scsi_id_instance_data *scsi_id,
1da177e4
LT		 2108 struct scsi_cmnd *SCpnt)
2109{
2110 u8 *scsi_buf = SCpnt->request_buffer;
1da177e4 2111
d024ebc6 2112 SBP2_DEBUG_ENTER();
1da177e4 2113
e30809fd 2114 if (SCpnt->cmnd[0] == INQUIRY && (SCpnt->cmnd[1] & 3) == 0) {
a237f35f
SR		 2115 /*
2116 * Make sure data length is ok. Minimum length is 36 bytes
2117 */
2118 if (scsi_buf[4] == 0) {
2119 scsi_buf[4] = 36 - 5;
2120 }
1da177e4 2121
a237f35f
SR		 2122 /*
2123 * Fix ansi revision and response data format
2124 */
2125 scsi_buf[2] |= 2;
2126 scsi_buf[3] = (scsi_buf[3] & 0xf0) | 2;
1da177e4 2127 }
1da177e4
LT		 2128}
2129
2130/*
2131 * This function deals with status writes from the SBP-2 device
2132 */
2133static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, int destid,
2134 quadlet_t *data, u64 addr, size_t length, u16 fl)
2135{
2136 struct sbp2scsi_host_info *hi;
2137 struct scsi_id_instance_data *scsi_id = NULL, *scsi_id_tmp;
1da177e4
LT		 2138 struct scsi_cmnd *SCpnt = NULL;
2139 u32 scsi_status = SBP2_SCSI_STATUS_GOOD;
2140 struct sbp2_command_info *command;
79456197 2141 unsigned long flags;
1da177e4 2142
d024ebc6 2143 SBP2_DEBUG_ENTER();
1da177e4
LT		 2144
2145 sbp2util_packet_dump(data, length, "sbp2 status write by device", (u32)addr);
2146
2147 if (!host) {
2148 SBP2_ERR("host is NULL - this is bad!");
a237f35f 2149 return RCODE_ADDRESS_ERROR;
1da177e4
LT		 2150 }
2151
2152 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
2153
2154 if (!hi) {
2155 SBP2_ERR("host info is NULL - this is bad!");
a237f35f 2156 return RCODE_ADDRESS_ERROR;
1da177e4
LT		 2157 }
2158
2159 /*
35bdddb8
SR		 2160 * Find our scsi_id structure by looking at the status fifo address
2161 * written to by the sbp2 device.
1da177e4 2162 */
1da177e4 2163 list_for_each_entry(scsi_id_tmp, &hi->scsi_ids, scsi_list) {
35bdddb8
SR		 2164 if (scsi_id_tmp->ne->nodeid == nodeid &&
2165 scsi_id_tmp->status_fifo_addr == addr) {
1da177e4
LT		 2166 scsi_id = scsi_id_tmp;
2167 break;
2168 }
2169 }
2170
2171 if (!scsi_id) {
2172 SBP2_ERR("scsi_id is NULL - device is gone?");
a237f35f 2173 return RCODE_ADDRESS_ERROR;
1da177e4
LT		 2174 }
2175
2176 /*
2177 * Put response into scsi_id status fifo...
2178 */
2179 memcpy(&scsi_id->status_block, data, length);
2180
2181 /*
2182 * Byte swap first two quadlets (8 bytes) of status for processing
2183 */
2184 sbp2util_be32_to_cpu_buffer(&scsi_id->status_block, 8);
2185
2186 /*
2187 * Handle command ORB status here if necessary. First, need to match status with command.
2188 */
2189 command = sbp2util_find_command_for_orb(scsi_id, scsi_id->status_block.ORB_offset_lo);
2190 if (command) {
2191
2192 SBP2_DEBUG("Found status for command ORB");
2193 pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma,
2194 sizeof(struct sbp2_command_orb),
2195 PCI_DMA_BIDIRECTIONAL);
2196 pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma,
2197 sizeof(command->scatter_gather_element),
2198 PCI_DMA_BIDIRECTIONAL);
2199
2200 SBP2_ORB_DEBUG("matched command orb %p", &command->command_orb);
2201 outstanding_orb_decr;
2202
2203 /*
2204 * Matched status with command, now grab scsi command pointers and check status
2205 */
2206 SCpnt = command->Current_SCpnt;
24c7cd06 2207 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
1da177e4 2208 sbp2util_mark_command_completed(scsi_id, command);
24c7cd06 2209 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
1da177e4
LT		 2210
2211 if (SCpnt) {
2212
2213 /*
2214 * See if the target stored any scsi status information
2215 */
2216 if (STATUS_GET_LENGTH(scsi_id->status_block.ORB_offset_hi_misc) > 1) {
2217 /*
2218 * Translate SBP-2 status to SCSI sense data
2219 */
2220 SBP2_DEBUG("CHECK CONDITION");
2221 scsi_status = sbp2_status_to_sense_data((unchar *)&scsi_id->status_block, SCpnt->sense_buffer);
2222 }
2223
2224 /*
2225 * Check to see if the dead bit is set. If so, we'll have to initiate
2226 * a fetch agent reset.
2227 */
2228 if (STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc)) {
2229
2230 /*
2231 * Initiate a fetch agent reset.
2232 */
2233 SBP2_DEBUG("Dead bit set - initiating fetch agent reset");
2234 sbp2_agent_reset(scsi_id, 0);
2235 }
2236
2237 SBP2_ORB_DEBUG("completing command orb %p", &command->command_orb);
2238 }
2239
2240 /*
2241 * Check here to see if there are no commands in-use. If there are none, we can
2242 * null out last orb so that next time around we write directly to the orb pointer...
2243 * Quick start saves one 1394 bus transaction.
2244 */
79456197 2245 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
1da177e4
LT		 2246 if (list_empty(&scsi_id->sbp2_command_orb_inuse)) {
2247 scsi_id->last_orb = NULL;
2248 }
79456197 2249 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
1da177e4
LT		 2250
2251 } else {
2252
2253 /*
2254 * It's probably a login/logout/reconnect status.
2255 */
2256 if ((scsi_id->login_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
2257 (scsi_id->query_logins_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
2258 (scsi_id->reconnect_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
2259 (scsi_id->logout_orb_dma == scsi_id->status_block.ORB_offset_lo)) {
2260 atomic_set(&scsi_id->sbp2_login_complete, 1);
2261 }
2262 }
2263
2264 if (SCpnt) {
2265
2266 /* Complete the SCSI command. */
2267 SBP2_DEBUG("Completing SCSI command");
2268 sbp2scsi_complete_command(scsi_id, scsi_status, SCpnt,
2269 command->Current_done);
2270 SBP2_ORB_DEBUG("command orb completed");
2271 }
2272
a237f35f 2273 return RCODE_COMPLETE;
1da177e4
LT		 2274}
2275
1da177e4
LT		 2276/**************************************
2277 * SCSI interface related section
2278 **************************************/
2279
2280/*
2281 * This routine is the main request entry routine for doing I/O. It is
2282 * called from the scsi stack directly.
2283 */
2284static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt,
2285 void (*done)(struct scsi_cmnd *))
2286{
2287 struct scsi_id_instance_data *scsi_id =
2288 (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
2289 struct sbp2scsi_host_info *hi;
abd559b1 2290 int result = DID_NO_CONNECT << 16;
1da177e4 2291
d024ebc6
SR		 2292 SBP2_DEBUG_ENTER();
2293#if (CONFIG_IEEE1394_SBP2_DEBUG >= 2) || defined(CONFIG_IEEE1394_SBP2_PACKET_DUMP)
2294 scsi_print_command(SCpnt);
2295#endif
1da177e4 2296
abd559b1
JM		 2297 if (!sbp2util_node_is_available(scsi_id))
2298 goto done;
1da177e4
LT		 2299
2300 hi = scsi_id->hi;
2301
2302 if (!hi) {
2303 SBP2_ERR("sbp2scsi_host_info is NULL - this is bad!");
abd559b1 2304 goto done;
1da177e4
LT		 2305 }
2306
2307 /*
2308 * Until we handle multiple luns, just return selection time-out
2309 * to any IO directed at non-zero LUNs
2310 */
abd559b1
JM		 2311 if (SCpnt->device->lun)
2312 goto done;
1da177e4
LT		 2313
2314 /*
2315 * Check for request sense command, and handle it here
2316 * (autorequest sense)
2317 */
2318 if (SCpnt->cmnd[0] == REQUEST_SENSE) {
2319 SBP2_DEBUG("REQUEST_SENSE");
2320 memcpy(SCpnt->request_buffer, SCpnt->sense_buffer, SCpnt->request_bufflen);
2321 memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer));
2322 sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_GOOD, SCpnt, done);
abd559b1 2323 return 0;
1da177e4
LT		 2324 }
2325
2326 /*
2327 * Check to see if we are in the middle of a bus reset.
2328 */
2329 if (!hpsb_node_entry_valid(scsi_id->ne)) {
2330 SBP2_ERR("Bus reset in progress - rejecting command");
abd559b1
JM		 2331 result = DID_BUS_BUSY << 16;
2332 goto done;
1da177e4
LT		 2333 }
2334
43863eba
SR		 2335 /*
2336 * Bidirectional commands are not yet implemented,
2337 * and unknown transfer direction not handled.
2338 */
2339 if (SCpnt->sc_data_direction == DMA_BIDIRECTIONAL) {
2340 SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command");
2341 result = DID_ERROR << 16;
2342 goto done;
2343 }
2344
1da177e4
LT		 2345 /*
2346 * Try and send our SCSI command
2347 */
2348 if (sbp2_send_command(scsi_id, SCpnt, done)) {
2349 SBP2_ERR("Error sending SCSI command");
2350 sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_SELECTION_TIMEOUT,
2351 SCpnt, done);
2352 }
abd559b1 2353 return 0;
1da177e4 2354
abd559b1
JM		 2355done:
2356 SCpnt->result = result;
2357 done(SCpnt);
2358 return 0;
1da177e4
LT		 2359}
2360
2361/*
2362 * This function is called in order to complete all outstanding SBP-2
2363 * commands (in case of resets, etc.).
2364 */
2365static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id,
2366 u32 status)
2367{
2368 struct sbp2scsi_host_info *hi = scsi_id->hi;
2369 struct list_head *lh;
2370 struct sbp2_command_info *command;
79456197 2371 unsigned long flags;
1da177e4 2372
d024ebc6 2373 SBP2_DEBUG_ENTER();
1da177e4 2374
79456197 2375 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
1da177e4
LT		 2376 while (!list_empty(&scsi_id->sbp2_command_orb_inuse)) {
2377 SBP2_DEBUG("Found pending command to complete");
2378 lh = scsi_id->sbp2_command_orb_inuse.next;
2379 command = list_entry(lh, struct sbp2_command_info, list);
2380 pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma,
2381 sizeof(struct sbp2_command_orb),
2382 PCI_DMA_BIDIRECTIONAL);
2383 pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma,
2384 sizeof(command->scatter_gather_element),
2385 PCI_DMA_BIDIRECTIONAL);
2386 sbp2util_mark_command_completed(scsi_id, command);
2387 if (command->Current_SCpnt) {
2388 command->Current_SCpnt->result = status << 16;
2389 command->Current_done(command->Current_SCpnt);
2390 }
2391 }
79456197 2392 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
1da177e4
LT		 2393
2394 return;
2395}
2396
2397/*
2398 * This function is called in order to complete a regular SBP-2 command.
2399 *
2400 * This can be called in interrupt context.
2401 */
2402static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id,
2403 u32 scsi_status, struct scsi_cmnd *SCpnt,
2404 void (*done)(struct scsi_cmnd *))
2405{
d024ebc6 2406 SBP2_DEBUG_ENTER();
1da177e4
LT		 2407
2408 /*
2409 * Sanity
2410 */
2411 if (!SCpnt) {
2412 SBP2_ERR("SCpnt is NULL");
2413 return;
2414 }
2415
2416 /*
2417 * If a bus reset is in progress and there was an error, don't
2418 * complete the command, just let it get retried at the end of the
2419 * bus reset.
2420 */
a237f35f
SR		 2421 if (!hpsb_node_entry_valid(scsi_id->ne)
2422 && (scsi_status != SBP2_SCSI_STATUS_GOOD)) {
1da177e4
LT		 2423 SBP2_ERR("Bus reset in progress - retry command later");
2424 return;
2425 }
a237f35f 2426
1da177e4
LT		 2427 /*
2428 * Switch on scsi status
2429 */
2430 switch (scsi_status) {
a237f35f 2431 case SBP2_SCSI_STATUS_GOOD:
8f0525ff 2432 SCpnt->result = DID_OK << 16;
a237f35f 2433 break;
1da177e4 2434
a237f35f
SR		 2435 case SBP2_SCSI_STATUS_BUSY:
2436 SBP2_ERR("SBP2_SCSI_STATUS_BUSY");
2437 SCpnt->result = DID_BUS_BUSY << 16;
2438 break;
1da177e4 2439
a237f35f
SR		 2440 case SBP2_SCSI_STATUS_CHECK_CONDITION:
2441 SBP2_DEBUG("SBP2_SCSI_STATUS_CHECK_CONDITION");
8f0525ff 2442 SCpnt->result = CHECK_CONDITION << 1 | DID_OK << 16;
1da177e4 2443#if CONFIG_IEEE1394_SBP2_DEBUG >= 1
a237f35f 2444 scsi_print_command(SCpnt);
d024ebc6 2445 scsi_print_sense(SBP2_DEVICE_NAME, SCpnt);
1da177e4 2446#endif
a237f35f 2447 break;
1da177e4 2448
a237f35f
SR		 2449 case SBP2_SCSI_STATUS_SELECTION_TIMEOUT:
2450 SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT");
2451 SCpnt->result = DID_NO_CONNECT << 16;
2452 scsi_print_command(SCpnt);
2453 break;
1da177e4 2454
a237f35f
SR		 2455 case SBP2_SCSI_STATUS_CONDITION_MET:
2456 case SBP2_SCSI_STATUS_RESERVATION_CONFLICT:
2457 case SBP2_SCSI_STATUS_COMMAND_TERMINATED:
2458 SBP2_ERR("Bad SCSI status = %x", scsi_status);
2459 SCpnt->result = DID_ERROR << 16;
2460 scsi_print_command(SCpnt);
2461 break;
1da177e4 2462
a237f35f
SR		 2463 default:
2464 SBP2_ERR("Unsupported SCSI status = %x", scsi_status);
2465 SCpnt->result = DID_ERROR << 16;
1da177e4
LT		 2466 }
2467
2468 /*
2469 * Take care of any sbp2 response data mucking here (RBC stuff, etc.)
2470 */
8f0525ff 2471 if (SCpnt->result == DID_OK << 16) {
1da177e4
LT		 2472 sbp2_check_sbp2_response(scsi_id, SCpnt);
2473 }
2474
2475 /*
2476 * If a bus reset is in progress and there was an error, complete
2477 * the command as busy so that it will get retried.
2478 */
a237f35f
SR		 2479 if (!hpsb_node_entry_valid(scsi_id->ne)
2480 && (scsi_status != SBP2_SCSI_STATUS_GOOD)) {
1da177e4
LT		 2481 SBP2_ERR("Completing command with busy (bus reset)");
2482 SCpnt->result = DID_BUS_BUSY << 16;
2483 }
2484
2485 /*
2486 * If a unit attention occurs, return busy status so it gets
2487 * retried... it could have happened because of a 1394 bus reset
2488 * or hot-plug...
8f0525ff
SR		 2489 * XXX DID_BUS_BUSY is actually a bad idea because it will defy
2490 * the scsi layer's retry logic.
1da177e4
LT		 2491 */
2492#if 0
2493 if ((scsi_status == SBP2_SCSI_STATUS_CHECK_CONDITION) &&
2494 (SCpnt->sense_buffer[2] == UNIT_ATTENTION)) {
2495 SBP2_DEBUG("UNIT ATTENTION - return busy");
2496 SCpnt->result = DID_BUS_BUSY << 16;
2497 }
2498#endif
2499
2500 /*
2501 * Tell scsi stack that we're done with this command
2502 */
a237f35f 2503 done(SCpnt);
1da177e4
LT		 2504}
2505
abd559b1 2506static int sbp2scsi_slave_alloc(struct scsi_device *sdev)
1da177e4 2507{
a80614d1
SR		 2508 struct scsi_id_instance_data *scsi_id =
2509 (struct scsi_id_instance_data *)sdev->host->hostdata[0];
2510
2511 scsi_id->sdev = sdev;
2512
24d3bf88 2513 if (scsi_id->workarounds & SBP2_WORKAROUND_INQUIRY_36)
a80614d1 2514 sdev->inquiry_len = 36;
abd559b1
JM		 2515 return 0;
2516}
2517
abd559b1
JM		 2518static int sbp2scsi_slave_configure(struct scsi_device *sdev)
2519{
24d3bf88
SR		 2520 struct scsi_id_instance_data *scsi_id =
2521 (struct scsi_id_instance_data *)sdev->host->hostdata[0];
2522
abd559b1 2523 blk_queue_dma_alignment(sdev->request_queue, (512 - 1));
365c786f
BC		 2524 sdev->use_10_for_rw = 1;
2525 sdev->use_10_for_ms = 1;
24d3bf88
SR		 2526
2527 if (sdev->type == TYPE_DISK &&
2528 scsi_id->workarounds & SBP2_WORKAROUND_MODE_SENSE_8)
2529 sdev->skip_ms_page_8 = 1;
e9a1c52c
SR		 2530 if (scsi_id->workarounds & SBP2_WORKAROUND_FIX_CAPACITY)
2531 sdev->fix_capacity = 1;
1da177e4
LT		 2532 return 0;
2533}
2534
abd559b1
JM		 2535static void sbp2scsi_slave_destroy(struct scsi_device *sdev)
2536{
2537 ((struct scsi_id_instance_data *)sdev->host->hostdata[0])->sdev = NULL;
2538 return;
2539}
2540
1da177e4
LT		 2541/*
2542 * Called by scsi stack when something has really gone wrong. Usually
2543 * called when a command has timed-out for some reason.
2544 */
2545static int sbp2scsi_abort(struct scsi_cmnd *SCpnt)
2546{
2547 struct scsi_id_instance_data *scsi_id =
2548 (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
2549 struct sbp2scsi_host_info *hi = scsi_id->hi;
2550 struct sbp2_command_info *command;
24c7cd06 2551 unsigned long flags;
1da177e4
LT		 2552
2553 SBP2_ERR("aborting sbp2 command");
2554 scsi_print_command(SCpnt);
2555
abd559b1 2556 if (sbp2util_node_is_available(scsi_id)) {
1da177e4
LT		 2557
2558 /*
2559 * Right now, just return any matching command structures
2560 * to the free pool.
2561 */
24c7cd06 2562 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
1da177e4
LT		 2563 command = sbp2util_find_command_for_SCpnt(scsi_id, SCpnt);
2564 if (command) {
2565 SBP2_DEBUG("Found command to abort");
2566 pci_dma_sync_single_for_cpu(hi->host->pdev,
2567 command->command_orb_dma,
2568 sizeof(struct sbp2_command_orb),
2569 PCI_DMA_BIDIRECTIONAL);
2570 pci_dma_sync_single_for_cpu(hi->host->pdev,
2571 command->sge_dma,
2572 sizeof(command->scatter_gather_element),
2573 PCI_DMA_BIDIRECTIONAL);
2574 sbp2util_mark_command_completed(scsi_id, command);
2575 if (command->Current_SCpnt) {
2576 command->Current_SCpnt->result = DID_ABORT << 16;
2577 command->Current_done(command->Current_SCpnt);
2578 }
2579 }
24c7cd06 2580 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
1da177e4
LT		 2581
2582 /*
2583 * Initiate a fetch agent reset.
2584 */
2585 sbp2_agent_reset(scsi_id, 0);
2586 sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY);
2587 }
2588
a237f35f 2589 return SUCCESS;
1da177e4
LT		 2590}
2591
2592/*
2593 * Called by scsi stack when something has really gone wrong.
2594 */
abd559b1 2595static int sbp2scsi_reset(struct scsi_cmnd *SCpnt)
1da177e4
LT		 2596{
2597 struct scsi_id_instance_data *scsi_id =
2598 (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
2599
2600 SBP2_ERR("reset requested");
2601
abd559b1 2602 if (sbp2util_node_is_available(scsi_id)) {
1da177e4
LT		 2603 SBP2_ERR("Generating sbp2 fetch agent reset");
2604 sbp2_agent_reset(scsi_id, 0);
2605 }
2606
abd559b1 2607 return SUCCESS;
94d0e7b8
JG		 2608}
2609
a237f35f
SR		 2610static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev,
2611 struct device_attribute *attr,
2612 char *buf)
1da177e4
LT		 2613{
2614 struct scsi_device *sdev;
2615 struct scsi_id_instance_data *scsi_id;
2616 int lun;
2617
2618 if (!(sdev = to_scsi_device(dev)))
2619 return 0;
2620
2621 if (!(scsi_id = (struct scsi_id_instance_data *)sdev->host->hostdata[0]))
2622 return 0;
2623
e309fc6d 2624 lun = ORB_SET_LUN(scsi_id->sbp2_lun);
1da177e4
LT		 2625
2626 return sprintf(buf, "%016Lx:%d:%d\n", (unsigned long long)scsi_id->ne->guid,
2627 scsi_id->ud->id, lun);
2628}
2629static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL);
2630
2631static struct device_attribute *sbp2_sysfs_sdev_attrs[] = {
2632 &dev_attr_ieee1394_id,
2633 NULL
2634};
2635
2636MODULE_AUTHOR("Ben Collins <bcollins@debian.org>");
2637MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver");
2638MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME);
2639MODULE_LICENSE("GPL");
2640
2641/* SCSI host template */
2642static struct scsi_host_template scsi_driver_template = {
2643 .module = THIS_MODULE,
2644 .name = "SBP-2 IEEE-1394",
2645 .proc_name = SBP2_DEVICE_NAME,
1da177e4
LT		 2646 .queuecommand = sbp2scsi_queuecommand,
2647 .eh_abort_handler = sbp2scsi_abort,
2648 .eh_device_reset_handler = sbp2scsi_reset,
abd559b1 2649 .slave_alloc = sbp2scsi_slave_alloc,
1da177e4 2650 .slave_configure = sbp2scsi_slave_configure,
abd559b1 2651 .slave_destroy = sbp2scsi_slave_destroy,
1da177e4
LT		 2652 .this_id = -1,
2653 .sg_tablesize = SG_ALL,
2654 .use_clustering = ENABLE_CLUSTERING,
2655 .cmd_per_lun = SBP2_MAX_CMDS,
2656 .can_queue = SBP2_MAX_CMDS,
2657 .emulated = 1,
2658 .sdev_attrs = sbp2_sysfs_sdev_attrs,
2659};
2660
2661static int sbp2_module_init(void)
2662{
2663 int ret;
2664
d024ebc6 2665 SBP2_DEBUG_ENTER();
1da177e4 2666
1da177e4
LT		 2667 /* Module load debug option to force one command at a time (serializing I/O) */
2668 if (serialize_io) {
2bab359a
JM		 2669 SBP2_INFO("Driver forced to serialize I/O (serialize_io=1)");
2670 SBP2_INFO("Try serialize_io=0 for better performance");
1da177e4
LT		 2671 scsi_driver_template.can_queue = 1;
2672 scsi_driver_template.cmd_per_lun = 1;
2673 }
2674
24d3bf88
SR		 2675 if (sbp2_default_workarounds & SBP2_WORKAROUND_128K_MAX_TRANS &&
2676 (max_sectors * 512) > (128 * 1024))
2677 max_sectors = 128 * 1024 / 512;
1da177e4
LT		 2678 scsi_driver_template.max_sectors = max_sectors;
2679
1da177e4
LT		 2680 /* Register our high level driver with 1394 stack */
2681 hpsb_register_highlevel(&sbp2_highlevel);
2682
2683 ret = hpsb_register_protocol(&sbp2_driver);
2684 if (ret) {
2685 SBP2_ERR("Failed to register protocol");
2686 hpsb_unregister_highlevel(&sbp2_highlevel);
2687 return ret;
2688 }
2689
2690 return 0;
2691}
2692
2693static void __exit sbp2_module_exit(void)
2694{
d024ebc6 2695 SBP2_DEBUG_ENTER();
1da177e4
LT		 2696
2697 hpsb_unregister_protocol(&sbp2_driver);
2698
2699 hpsb_unregister_highlevel(&sbp2_highlevel);
2700}
2701
2702module_init(sbp2_module_init);
2703module_exit(sbp2_module_exit);
Linux kernel - Deliverables
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