blob: eca92eb475a155e84521421e8adb145a9c031772 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * sbp2.c - SBP-2 protocol driver for IEEE-1394
3 *
4 * Copyright (C) 2000 James Goodwin, Filanet Corporation (www.filanet.com)
5 * jamesg@filanet.com (JSG)
6 *
7 * Copyright (C) 2003 Ben Collins <bcollins@debian.org>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software Foundation,
21 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 */
23
24/*
25 * Brief Description:
26 *
27 * This driver implements the Serial Bus Protocol 2 (SBP-2) over IEEE-1394
28 * under Linux. The SBP-2 driver is implemented as an IEEE-1394 high-level
29 * driver. It also registers as a SCSI lower-level driver in order to accept
30 * SCSI commands for transport using SBP-2.
31 *
32 * You may access any attached SBP-2 storage devices as if they were SCSI
33 * devices (e.g. mount /dev/sda1, fdisk, mkfs, etc.).
34 *
35 * Current Issues:
36 *
37 * - Error Handling: SCSI aborts and bus reset requests are handled somewhat
38 * but the code needs additional debugging.
39 */
40
41#include <linux/config.h>
42#include <linux/kernel.h>
43#include <linux/list.h>
44#include <linux/string.h>
45#include <linux/slab.h>
46#include <linux/interrupt.h>
47#include <linux/fs.h>
48#include <linux/poll.h>
49#include <linux/module.h>
50#include <linux/moduleparam.h>
51#include <linux/types.h>
52#include <linux/delay.h>
53#include <linux/sched.h>
54#include <linux/blkdev.h>
55#include <linux/smp_lock.h>
56#include <linux/init.h>
57#include <linux/pci.h>
58
59#include <asm/current.h>
60#include <asm/uaccess.h>
61#include <asm/io.h>
62#include <asm/byteorder.h>
63#include <asm/atomic.h>
64#include <asm/system.h>
65#include <asm/scatterlist.h>
66
67#include <scsi/scsi.h>
68#include <scsi/scsi_cmnd.h>
69#include <scsi/scsi_dbg.h>
70#include <scsi/scsi_device.h>
71#include <scsi/scsi_host.h>
72
73#include "csr1212.h"
74#include "ieee1394.h"
75#include "ieee1394_types.h"
76#include "ieee1394_core.h"
77#include "nodemgr.h"
78#include "hosts.h"
79#include "highlevel.h"
80#include "ieee1394_transactions.h"
81#include "sbp2.h"
82
Linus Torvalds1da177e2005-04-16 15:20:36 -070083/*
84 * Module load parameter definitions
85 */
86
87/*
88 * Change max_speed on module load if you have a bad IEEE-1394
89 * controller that has trouble running 2KB packets at 400mb.
90 *
91 * NOTE: On certain OHCI parts I have seen short packets on async transmit
92 * (probably due to PCI latency/throughput issues with the part). You can
93 * bump down the speed if you are running into problems.
94 */
95static int max_speed = IEEE1394_SPEED_MAX;
96module_param(max_speed, int, 0644);
Jody McIntyre2bab3592005-09-30 11:59:07 -070097MODULE_PARM_DESC(max_speed, "Force max speed (3 = 800mb, 2 = 400mb, 1 = 200mb, 0 = 100mb)");
Linus Torvalds1da177e2005-04-16 15:20:36 -070098
99/*
100 * Set serialize_io to 1 if you'd like only one scsi command sent
101 * down to us at a time (debugging). This might be necessary for very
102 * badly behaved sbp2 devices.
Jody McIntyre2bab3592005-09-30 11:59:07 -0700103 *
104 * TODO: Make this configurable per device.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 */
Jody McIntyre2bab3592005-09-30 11:59:07 -0700106static int serialize_io = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107module_param(serialize_io, int, 0444);
Jody McIntyre2bab3592005-09-30 11:59:07 -0700108MODULE_PARM_DESC(serialize_io, "Serialize I/O coming from scsi drivers (default = 1, faster = 0)");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109
110/*
111 * Bump up max_sectors if you'd like to support very large sized
112 * transfers. Please note that some older sbp2 bridge chips are broken for
113 * transfers greater or equal to 128KB. Default is a value of 255
114 * sectors, or just under 128KB (at 512 byte sector size). I can note that
115 * the Oxsemi sbp2 chipsets have no problems supporting very large
116 * transfer sizes.
117 */
118static int max_sectors = SBP2_MAX_SECTORS;
119module_param(max_sectors, int, 0444);
120MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported (default = 255)");
121
122/*
123 * Exclusive login to sbp2 device? In most cases, the sbp2 driver should
124 * do an exclusive login, as it's generally unsafe to have two hosts
125 * talking to a single sbp2 device at the same time (filesystem coherency,
126 * etc.). If you're running an sbp2 device that supports multiple logins,
127 * and you're either running read-only filesystems or some sort of special
128 * filesystem supporting multiple hosts (one such filesystem is OpenGFS,
129 * see opengfs.sourceforge.net for more info), then set exclusive_login
130 * to zero. Note: The Oxsemi OXFW911 sbp2 chipset supports up to four
131 * concurrent logins.
132 */
133static int exclusive_login = 1;
134module_param(exclusive_login, int, 0644);
135MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device (default = 1)");
136
137/*
138 * SCSI inquiry hack for really badly behaved sbp2 devices. Turn this on
139 * if your sbp2 device is not properly handling the SCSI inquiry command.
Stefan Richtera80614d2006-02-14 22:04:19 -0500140 * This hack makes the inquiry look more like a typical MS Windows inquiry
141 * by enforcing 36 byte inquiry and avoiding access to mode_sense page 8.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142 *
143 * If force_inquiry_hack=1 is required for your device to work,
144 * please submit the logged sbp2_firmware_revision value of this device to
145 * the linux1394-devel mailing list.
146 */
Ben Collins1934b8b2005-07-09 20:01:23 -0400147static int force_inquiry_hack;
Stefan Richtera80614d2006-02-14 22:04:19 -0500148module_param(force_inquiry_hack, int, 0644);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149MODULE_PARM_DESC(force_inquiry_hack, "Force SCSI inquiry hack (default = 0)");
150
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151/*
152 * Export information about protocols/devices supported by this driver.
153 */
154static struct ieee1394_device_id sbp2_id_table[] = {
155 {
Stefan Richtera237f352005-11-07 06:31:39 -0500156 .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
157 .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff,
158 .version = SBP2_SW_VERSION_ENTRY & 0xffffff},
159 {}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160};
161
162MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table);
163
164/*
165 * Debug levels, configured via kernel config, or enable here.
166 */
167
Olaf Hering44456d32005-07-27 11:45:17 -0700168#define CONFIG_IEEE1394_SBP2_DEBUG 0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169/* #define CONFIG_IEEE1394_SBP2_DEBUG_ORBS */
170/* #define CONFIG_IEEE1394_SBP2_DEBUG_DMA */
171/* #define CONFIG_IEEE1394_SBP2_DEBUG 1 */
172/* #define CONFIG_IEEE1394_SBP2_DEBUG 2 */
173/* #define CONFIG_IEEE1394_SBP2_PACKET_DUMP */
174
175#ifdef CONFIG_IEEE1394_SBP2_DEBUG_ORBS
176#define SBP2_ORB_DEBUG(fmt, args...) HPSB_ERR("sbp2(%s): "fmt, __FUNCTION__, ## args)
177static u32 global_outstanding_command_orbs = 0;
178#define outstanding_orb_incr global_outstanding_command_orbs++
179#define outstanding_orb_decr global_outstanding_command_orbs--
180#else
181#define SBP2_ORB_DEBUG(fmt, args...)
182#define outstanding_orb_incr
183#define outstanding_orb_decr
184#endif
185
186#ifdef CONFIG_IEEE1394_SBP2_DEBUG_DMA
187#define SBP2_DMA_ALLOC(fmt, args...) \
188 HPSB_ERR("sbp2(%s)alloc(%d): "fmt, __FUNCTION__, \
189 ++global_outstanding_dmas, ## args)
190#define SBP2_DMA_FREE(fmt, args...) \
191 HPSB_ERR("sbp2(%s)free(%d): "fmt, __FUNCTION__, \
192 --global_outstanding_dmas, ## args)
193static u32 global_outstanding_dmas = 0;
194#else
195#define SBP2_DMA_ALLOC(fmt, args...)
196#define SBP2_DMA_FREE(fmt, args...)
197#endif
198
199#if CONFIG_IEEE1394_SBP2_DEBUG >= 2
200#define SBP2_DEBUG(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
201#define SBP2_INFO(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
202#define SBP2_NOTICE(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
203#define SBP2_WARN(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
204#elif CONFIG_IEEE1394_SBP2_DEBUG == 1
205#define SBP2_DEBUG(fmt, args...) HPSB_DEBUG("sbp2: "fmt, ## args)
206#define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
207#define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args)
208#define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args)
209#else
210#define SBP2_DEBUG(fmt, args...)
211#define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
212#define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args)
213#define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args)
214#endif
215
216#define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
217
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218/*
219 * Globals
220 */
221
222static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id,
223 u32 status);
224
225static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id,
226 u32 scsi_status, struct scsi_cmnd *SCpnt,
227 void (*done)(struct scsi_cmnd *));
228
229static struct scsi_host_template scsi_driver_template;
230
231static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC };
232
233static void sbp2_host_reset(struct hpsb_host *host);
234
235static int sbp2_probe(struct device *dev);
236static int sbp2_remove(struct device *dev);
237static int sbp2_update(struct unit_directory *ud);
238
239static struct hpsb_highlevel sbp2_highlevel = {
240 .name = SBP2_DEVICE_NAME,
241 .host_reset = sbp2_host_reset,
242};
243
244static struct hpsb_address_ops sbp2_ops = {
245 .write = sbp2_handle_status_write
246};
247
248#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
249static struct hpsb_address_ops sbp2_physdma_ops = {
Stefan Richtera237f352005-11-07 06:31:39 -0500250 .read = sbp2_handle_physdma_read,
251 .write = sbp2_handle_physdma_write,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252};
253#endif
254
255static struct hpsb_protocol_driver sbp2_driver = {
256 .name = "SBP2 Driver",
257 .id_table = sbp2_id_table,
258 .update = sbp2_update,
259 .driver = {
260 .name = SBP2_DEVICE_NAME,
261 .bus = &ieee1394_bus_type,
262 .probe = sbp2_probe,
263 .remove = sbp2_remove,
264 },
265};
266
Stefan Richtera80614d2006-02-14 22:04:19 -0500267/*
268 * List of device firmwares that require the inquiry hack.
269 * Yields a few false positives but did not break other devices so far.
270 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271static u32 sbp2_broken_inquiry_list[] = {
Stefan Richtera80614d2006-02-14 22:04:19 -0500272 0x00002800, /* Stefan Richter <stefanr@s5r6.in-berlin.de> */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 /* DViCO Momobay CX-1 */
274 0x00000200 /* Andreas Plesch <plesch@fas.harvard.edu> */
275 /* QPS Fire DVDBurner */
276};
277
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278/**************************************
279 * General utility functions
280 **************************************/
281
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282#ifndef __BIG_ENDIAN
283/*
284 * Converts a buffer from be32 to cpu byte ordering. Length is in bytes.
285 */
286static __inline__ void sbp2util_be32_to_cpu_buffer(void *buffer, int length)
287{
288 u32 *temp = buffer;
289
290 for (length = (length >> 2); length--; )
291 temp[length] = be32_to_cpu(temp[length]);
292
293 return;
294}
295
296/*
297 * Converts a buffer from cpu to be32 byte ordering. Length is in bytes.
298 */
299static __inline__ void sbp2util_cpu_to_be32_buffer(void *buffer, int length)
300{
301 u32 *temp = buffer;
302
303 for (length = (length >> 2); length--; )
304 temp[length] = cpu_to_be32(temp[length]);
305
306 return;
307}
308#else /* BIG_ENDIAN */
309/* Why waste the cpu cycles? */
310#define sbp2util_be32_to_cpu_buffer(x,y)
311#define sbp2util_cpu_to_be32_buffer(x,y)
312#endif
313
314#ifdef CONFIG_IEEE1394_SBP2_PACKET_DUMP
315/*
316 * Debug packet dump routine. Length is in bytes.
317 */
Stefan Richtera237f352005-11-07 06:31:39 -0500318static void sbp2util_packet_dump(void *buffer, int length, char *dump_name,
319 u32 dump_phys_addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320{
321 int i;
322 unsigned char *dump = buffer;
323
324 if (!dump || !length || !dump_name)
325 return;
326
327 if (dump_phys_addr)
328 printk("[%s, 0x%x]", dump_name, dump_phys_addr);
329 else
330 printk("[%s]", dump_name);
331 for (i = 0; i < length; i++) {
332 if (i > 0x3f) {
333 printk("\n ...");
334 break;
335 }
336 if ((i & 0x3) == 0)
337 printk(" ");
338 if ((i & 0xf) == 0)
339 printk("\n ");
Stefan Richtera237f352005-11-07 06:31:39 -0500340 printk("%02x ", (int)dump[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 }
342 printk("\n");
343
344 return;
345}
346#else
347#define sbp2util_packet_dump(w,x,y,z)
348#endif
349
350/*
351 * Goofy routine that basically does a down_timeout function.
352 */
353static int sbp2util_down_timeout(atomic_t *done, int timeout)
354{
355 int i;
356
357 for (i = timeout; (i > 0 && atomic_read(done) == 0); i-= HZ/10) {
358 if (msleep_interruptible(100)) /* 100ms */
Stefan Richtera237f352005-11-07 06:31:39 -0500359 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 }
Stefan Richtera237f352005-11-07 06:31:39 -0500361 return (i > 0) ? 0 : 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362}
363
364/* Free's an allocated packet */
365static void sbp2_free_packet(struct hpsb_packet *packet)
366{
367 hpsb_free_tlabel(packet);
368 hpsb_free_packet(packet);
369}
370
371/* This is much like hpsb_node_write(), except it ignores the response
372 * subaction and returns immediately. Can be used from interrupts.
373 */
374static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr,
Stefan Richtera237f352005-11-07 06:31:39 -0500375 quadlet_t *buffer, size_t length)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376{
377 struct hpsb_packet *packet;
378
379 packet = hpsb_make_writepacket(ne->host, ne->nodeid,
380 addr, buffer, length);
Stefan Richtera237f352005-11-07 06:31:39 -0500381 if (!packet)
382 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383
Stefan Richtera237f352005-11-07 06:31:39 -0500384 hpsb_set_packet_complete_task(packet,
385 (void (*)(void *))sbp2_free_packet,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 packet);
387
388 hpsb_node_fill_packet(ne, packet);
389
Stefan Richtera237f352005-11-07 06:31:39 -0500390 if (hpsb_send_packet(packet) < 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391 sbp2_free_packet(packet);
392 return -EIO;
393 }
394
395 return 0;
396}
397
398/*
399 * This function is called to create a pool of command orbs used for
400 * command processing. It is called when a new sbp2 device is detected.
401 */
402static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data *scsi_id)
403{
404 struct sbp2scsi_host_info *hi = scsi_id->hi;
405 int i;
406 unsigned long flags, orbs;
407 struct sbp2_command_info *command;
408
409 orbs = serialize_io ? 2 : SBP2_MAX_CMDS;
410
411 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
412 for (i = 0; i < orbs; i++) {
Stefan Richter85511582005-11-07 06:31:45 -0500413 command = kzalloc(sizeof(*command), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 if (!command) {
Stefan Richtera237f352005-11-07 06:31:39 -0500415 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock,
416 flags);
417 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 command->command_orb_dma =
Stefan Richtera237f352005-11-07 06:31:39 -0500420 pci_map_single(hi->host->pdev, &command->command_orb,
421 sizeof(struct sbp2_command_orb),
422 PCI_DMA_BIDIRECTIONAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 SBP2_DMA_ALLOC("single command orb DMA");
424 command->sge_dma =
Stefan Richtera237f352005-11-07 06:31:39 -0500425 pci_map_single(hi->host->pdev,
426 &command->scatter_gather_element,
427 sizeof(command->scatter_gather_element),
428 PCI_DMA_BIDIRECTIONAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 SBP2_DMA_ALLOC("scatter_gather_element");
430 INIT_LIST_HEAD(&command->list);
431 list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed);
432 }
433 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
434 return 0;
435}
436
437/*
438 * This function is called to delete a pool of command orbs.
439 */
440static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data *scsi_id)
441{
442 struct hpsb_host *host = scsi_id->hi->host;
443 struct list_head *lh, *next;
444 struct sbp2_command_info *command;
445 unsigned long flags;
446
447 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
448 if (!list_empty(&scsi_id->sbp2_command_orb_completed)) {
449 list_for_each_safe(lh, next, &scsi_id->sbp2_command_orb_completed) {
450 command = list_entry(lh, struct sbp2_command_info, list);
451
452 /* Release our generic DMA's */
453 pci_unmap_single(host->pdev, command->command_orb_dma,
454 sizeof(struct sbp2_command_orb),
455 PCI_DMA_BIDIRECTIONAL);
456 SBP2_DMA_FREE("single command orb DMA");
457 pci_unmap_single(host->pdev, command->sge_dma,
458 sizeof(command->scatter_gather_element),
459 PCI_DMA_BIDIRECTIONAL);
460 SBP2_DMA_FREE("scatter_gather_element");
461
462 kfree(command);
463 }
464 }
465 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
466 return;
467}
468
469/*
470 * This function finds the sbp2_command for a given outstanding command
471 * orb.Only looks at the inuse list.
472 */
473static struct sbp2_command_info *sbp2util_find_command_for_orb(
474 struct scsi_id_instance_data *scsi_id, dma_addr_t orb)
475{
476 struct sbp2_command_info *command;
477 unsigned long flags;
478
479 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
480 if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) {
481 list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) {
482 if (command->command_orb_dma == orb) {
483 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
Stefan Richtera237f352005-11-07 06:31:39 -0500484 return command;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 }
486 }
487 }
488 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
489
490 SBP2_ORB_DEBUG("could not match command orb %x", (unsigned int)orb);
491
Stefan Richtera237f352005-11-07 06:31:39 -0500492 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493}
494
495/*
496 * This function finds the sbp2_command for a given outstanding SCpnt.
497 * Only looks at the inuse list.
498 */
499static struct sbp2_command_info *sbp2util_find_command_for_SCpnt(struct scsi_id_instance_data *scsi_id, void *SCpnt)
500{
501 struct sbp2_command_info *command;
502 unsigned long flags;
503
504 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
505 if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) {
506 list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) {
507 if (command->Current_SCpnt == SCpnt) {
508 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
Stefan Richtera237f352005-11-07 06:31:39 -0500509 return command;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 }
511 }
512 }
513 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
Stefan Richtera237f352005-11-07 06:31:39 -0500514 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515}
516
517/*
518 * This function allocates a command orb used to send a scsi command.
519 */
520static struct sbp2_command_info *sbp2util_allocate_command_orb(
521 struct scsi_id_instance_data *scsi_id,
522 struct scsi_cmnd *Current_SCpnt,
523 void (*Current_done)(struct scsi_cmnd *))
524{
525 struct list_head *lh;
526 struct sbp2_command_info *command = NULL;
527 unsigned long flags;
528
529 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
530 if (!list_empty(&scsi_id->sbp2_command_orb_completed)) {
531 lh = scsi_id->sbp2_command_orb_completed.next;
532 list_del(lh);
533 command = list_entry(lh, struct sbp2_command_info, list);
534 command->Current_done = Current_done;
535 command->Current_SCpnt = Current_SCpnt;
536 list_add_tail(&command->list, &scsi_id->sbp2_command_orb_inuse);
537 } else {
538 SBP2_ERR("sbp2util_allocate_command_orb - No orbs available!");
539 }
540 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
Stefan Richtera237f352005-11-07 06:31:39 -0500541 return command;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542}
543
544/* Free our DMA's */
545static void sbp2util_free_command_dma(struct sbp2_command_info *command)
546{
547 struct scsi_id_instance_data *scsi_id =
548 (struct scsi_id_instance_data *)command->Current_SCpnt->device->host->hostdata[0];
549 struct hpsb_host *host;
550
551 if (!scsi_id) {
552 printk(KERN_ERR "%s: scsi_id == NULL\n", __FUNCTION__);
553 return;
554 }
555
556 host = scsi_id->ud->ne->host;
557
558 if (command->cmd_dma) {
559 if (command->dma_type == CMD_DMA_SINGLE) {
560 pci_unmap_single(host->pdev, command->cmd_dma,
561 command->dma_size, command->dma_dir);
562 SBP2_DMA_FREE("single bulk");
563 } else if (command->dma_type == CMD_DMA_PAGE) {
564 pci_unmap_page(host->pdev, command->cmd_dma,
565 command->dma_size, command->dma_dir);
566 SBP2_DMA_FREE("single page");
567 } /* XXX: Check for CMD_DMA_NONE bug */
568 command->dma_type = CMD_DMA_NONE;
569 command->cmd_dma = 0;
570 }
571
572 if (command->sge_buffer) {
573 pci_unmap_sg(host->pdev, command->sge_buffer,
574 command->dma_size, command->dma_dir);
575 SBP2_DMA_FREE("scatter list");
576 command->sge_buffer = NULL;
577 }
578}
579
580/*
581 * This function moves a command to the completed orb list.
582 */
Stefan Richtera237f352005-11-07 06:31:39 -0500583static void sbp2util_mark_command_completed(struct scsi_id_instance_data *scsi_id,
584 struct sbp2_command_info *command)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585{
586 unsigned long flags;
587
588 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
589 list_del(&command->list);
590 sbp2util_free_command_dma(command);
591 list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed);
592 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
593}
594
Jody McIntyreabd559b2005-09-30 11:59:06 -0700595/*
596 * Is scsi_id valid? Is the 1394 node still present?
597 */
598static inline int sbp2util_node_is_available(struct scsi_id_instance_data *scsi_id)
599{
600 return scsi_id && scsi_id->ne && !scsi_id->ne->in_limbo;
601}
602
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603/*********************************************
604 * IEEE-1394 core driver stack related section
605 *********************************************/
606static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud);
607
608static int sbp2_probe(struct device *dev)
609{
610 struct unit_directory *ud;
611 struct scsi_id_instance_data *scsi_id;
612
613 SBP2_DEBUG("sbp2_probe");
614
615 ud = container_of(dev, struct unit_directory, device);
616
617 /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s)
618 * instead. */
619 if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY)
620 return -ENODEV;
621
Stefan Richtera237f352005-11-07 06:31:39 -0500622 scsi_id = sbp2_alloc_device(ud);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623
Stefan Richtera237f352005-11-07 06:31:39 -0500624 if (!scsi_id)
625 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626
Stefan Richtera237f352005-11-07 06:31:39 -0500627 sbp2_parse_unit_directory(scsi_id, ud);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628
Stefan Richtera237f352005-11-07 06:31:39 -0500629 return sbp2_start_device(scsi_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630}
631
632static int sbp2_remove(struct device *dev)
633{
634 struct unit_directory *ud;
635 struct scsi_id_instance_data *scsi_id;
Jody McIntyreabd559b2005-09-30 11:59:06 -0700636 struct scsi_device *sdev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637
638 SBP2_DEBUG("sbp2_remove");
639
640 ud = container_of(dev, struct unit_directory, device);
641 scsi_id = ud->device.driver_data;
Jody McIntyreabd559b2005-09-30 11:59:06 -0700642 if (!scsi_id)
643 return 0;
644
Stefan Richterbf637ec2006-01-31 00:13:06 -0500645 if (scsi_id->scsi_host) {
646 /* Get rid of enqueued commands if there is no chance to
647 * send them. */
648 if (!sbp2util_node_is_available(scsi_id))
649 sbp2scsi_complete_all_commands(scsi_id, DID_NO_CONNECT);
650 /* scsi_remove_device() will trigger shutdown functions of SCSI
651 * highlevel drivers which would deadlock if blocked. */
Jody McIntyreabd559b2005-09-30 11:59:06 -0700652 scsi_unblock_requests(scsi_id->scsi_host);
Stefan Richterbf637ec2006-01-31 00:13:06 -0500653 }
Jody McIntyreabd559b2005-09-30 11:59:06 -0700654 sdev = scsi_id->sdev;
655 if (sdev) {
656 scsi_id->sdev = NULL;
657 scsi_remove_device(sdev);
658 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659
660 sbp2_logout_device(scsi_id);
661 sbp2_remove_device(scsi_id);
662
663 return 0;
664}
665
666static int sbp2_update(struct unit_directory *ud)
667{
668 struct scsi_id_instance_data *scsi_id = ud->device.driver_data;
669
670 SBP2_DEBUG("sbp2_update");
671
672 if (sbp2_reconnect_device(scsi_id)) {
673
674 /*
675 * Ok, reconnect has failed. Perhaps we didn't
676 * reconnect fast enough. Try doing a regular login, but
677 * first do a logout just in case of any weirdness.
678 */
679 sbp2_logout_device(scsi_id);
680
681 if (sbp2_login_device(scsi_id)) {
682 /* Login failed too, just fail, and the backend
683 * will call our sbp2_remove for us */
684 SBP2_ERR("Failed to reconnect to sbp2 device!");
685 return -EBUSY;
686 }
687 }
688
689 /* Set max retries to something large on the device. */
690 sbp2_set_busy_timeout(scsi_id);
691
692 /* Do a SBP-2 fetch agent reset. */
693 sbp2_agent_reset(scsi_id, 1);
694
695 /* Get the max speed and packet size that we can use. */
696 sbp2_max_speed_and_size(scsi_id);
697
698 /* Complete any pending commands with busy (so they get
699 * retried) and remove them from our queue
700 */
701 sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY);
702
703 /* Make sure we unblock requests (since this is likely after a bus
704 * reset). */
705 scsi_unblock_requests(scsi_id->scsi_host);
706
707 return 0;
708}
709
710/* This functions is called by the sbp2_probe, for each new device. We now
711 * allocate one scsi host for each scsi_id (unit directory). */
712static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud)
713{
714 struct sbp2scsi_host_info *hi;
715 struct Scsi_Host *scsi_host = NULL;
716 struct scsi_id_instance_data *scsi_id = NULL;
717
718 SBP2_DEBUG("sbp2_alloc_device");
719
Stefan Richter85511582005-11-07 06:31:45 -0500720 scsi_id = kzalloc(sizeof(*scsi_id), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721 if (!scsi_id) {
722 SBP2_ERR("failed to create scsi_id");
723 goto failed_alloc;
724 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725
726 scsi_id->ne = ud->ne;
727 scsi_id->ud = ud;
728 scsi_id->speed_code = IEEE1394_SPEED_100;
729 scsi_id->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100];
730 atomic_set(&scsi_id->sbp2_login_complete, 0);
731 INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_inuse);
732 INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_completed);
733 INIT_LIST_HEAD(&scsi_id->scsi_list);
734 spin_lock_init(&scsi_id->sbp2_command_orb_lock);
Ben Collinse309fc62005-11-07 06:31:34 -0500735 scsi_id->sbp2_lun = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736
737 ud->device.driver_data = scsi_id;
738
739 hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host);
740 if (!hi) {
741 hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host, sizeof(*hi));
742 if (!hi) {
743 SBP2_ERR("failed to allocate hostinfo");
744 goto failed_alloc;
745 }
746 SBP2_DEBUG("sbp2_alloc_device: allocated hostinfo");
747 hi->host = ud->ne->host;
748 INIT_LIST_HEAD(&hi->scsi_ids);
749
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
751 /* Handle data movement if physical dma is not
752 * enabled/supportedon host controller */
753 hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, &sbp2_physdma_ops,
754 0x0ULL, 0xfffffffcULL);
755#endif
756 }
757
758 scsi_id->hi = hi;
759
760 list_add_tail(&scsi_id->scsi_list, &hi->scsi_ids);
761
Stefan Richter35bdddb2006-01-31 00:13:33 -0500762 /* Register the status FIFO address range. We could use the same FIFO
763 * for targets at different nodes. However we need different FIFOs per
764 * target in order to support multi-unit devices. */
765 scsi_id->status_fifo_addr = hpsb_allocate_and_register_addrspace(
766 &sbp2_highlevel, ud->ne->host, &sbp2_ops,
767 sizeof(struct sbp2_status_block), sizeof(quadlet_t),
768 ~0ULL, ~0ULL);
769 if (!scsi_id->status_fifo_addr) {
770 SBP2_ERR("failed to allocate status FIFO address range");
771 goto failed_alloc;
772 }
773
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774 /* Register our host with the SCSI stack. */
Alexandre Olivaa2ef79e2005-06-15 22:26:31 -0700775 scsi_host = scsi_host_alloc(&scsi_driver_template,
Stefan Richtera237f352005-11-07 06:31:39 -0500776 sizeof(unsigned long));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777 if (!scsi_host) {
778 SBP2_ERR("failed to register scsi host");
779 goto failed_alloc;
780 }
781
782 scsi_host->hostdata[0] = (unsigned long)scsi_id;
783
784 if (!scsi_add_host(scsi_host, &ud->device)) {
785 scsi_id->scsi_host = scsi_host;
786 return scsi_id;
787 }
788
789 SBP2_ERR("failed to add scsi host");
790 scsi_host_put(scsi_host);
791
792failed_alloc:
793 sbp2_remove_device(scsi_id);
794 return NULL;
795}
796
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797static void sbp2_host_reset(struct hpsb_host *host)
798{
799 struct sbp2scsi_host_info *hi;
800 struct scsi_id_instance_data *scsi_id;
801
802 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
803
804 if (hi) {
805 list_for_each_entry(scsi_id, &hi->scsi_ids, scsi_list)
806 scsi_block_requests(scsi_id->scsi_host);
807 }
808}
809
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810/*
811 * This function is where we first pull the node unique ids, and then
812 * allocate memory and register a SBP-2 device.
813 */
814static int sbp2_start_device(struct scsi_id_instance_data *scsi_id)
815{
816 struct sbp2scsi_host_info *hi = scsi_id->hi;
James Bottomley146f7262005-09-10 12:44:09 -0500817 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818
819 SBP2_DEBUG("sbp2_start_device");
820
821 /* Login FIFO DMA */
822 scsi_id->login_response =
Stefan Richtera237f352005-11-07 06:31:39 -0500823 pci_alloc_consistent(hi->host->pdev,
824 sizeof(struct sbp2_login_response),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825 &scsi_id->login_response_dma);
826 if (!scsi_id->login_response)
827 goto alloc_fail;
828 SBP2_DMA_ALLOC("consistent DMA region for login FIFO");
829
830 /* Query logins ORB DMA */
831 scsi_id->query_logins_orb =
Stefan Richtera237f352005-11-07 06:31:39 -0500832 pci_alloc_consistent(hi->host->pdev,
833 sizeof(struct sbp2_query_logins_orb),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834 &scsi_id->query_logins_orb_dma);
835 if (!scsi_id->query_logins_orb)
836 goto alloc_fail;
837 SBP2_DMA_ALLOC("consistent DMA region for query logins ORB");
838
839 /* Query logins response DMA */
840 scsi_id->query_logins_response =
Stefan Richtera237f352005-11-07 06:31:39 -0500841 pci_alloc_consistent(hi->host->pdev,
842 sizeof(struct sbp2_query_logins_response),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843 &scsi_id->query_logins_response_dma);
844 if (!scsi_id->query_logins_response)
845 goto alloc_fail;
846 SBP2_DMA_ALLOC("consistent DMA region for query logins response");
847
848 /* Reconnect ORB DMA */
849 scsi_id->reconnect_orb =
Stefan Richtera237f352005-11-07 06:31:39 -0500850 pci_alloc_consistent(hi->host->pdev,
851 sizeof(struct sbp2_reconnect_orb),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852 &scsi_id->reconnect_orb_dma);
853 if (!scsi_id->reconnect_orb)
854 goto alloc_fail;
855 SBP2_DMA_ALLOC("consistent DMA region for reconnect ORB");
856
857 /* Logout ORB DMA */
858 scsi_id->logout_orb =
Stefan Richtera237f352005-11-07 06:31:39 -0500859 pci_alloc_consistent(hi->host->pdev,
860 sizeof(struct sbp2_logout_orb),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861 &scsi_id->logout_orb_dma);
862 if (!scsi_id->logout_orb)
863 goto alloc_fail;
864 SBP2_DMA_ALLOC("consistent DMA region for logout ORB");
865
866 /* Login ORB DMA */
867 scsi_id->login_orb =
Stefan Richtera237f352005-11-07 06:31:39 -0500868 pci_alloc_consistent(hi->host->pdev,
869 sizeof(struct sbp2_login_orb),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870 &scsi_id->login_orb_dma);
Stefan Richtereaceec72005-12-13 11:05:05 -0500871 if (!scsi_id->login_orb)
872 goto alloc_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873 SBP2_DMA_ALLOC("consistent DMA region for login ORB");
874
875 SBP2_DEBUG("New SBP-2 device inserted, SCSI ID = %x", scsi_id->ud->id);
876
877 /*
878 * Create our command orb pool
879 */
880 if (sbp2util_create_command_orb_pool(scsi_id)) {
881 SBP2_ERR("sbp2util_create_command_orb_pool failed!");
882 sbp2_remove_device(scsi_id);
883 return -ENOMEM;
884 }
885
886 /* Schedule a timeout here. The reason is that we may be so close
887 * to a bus reset, that the device is not available for logins.
888 * This can happen when the bus reset is caused by the host
889 * connected to the sbp2 device being removed. That host would
890 * have a certain amount of time to relogin before the sbp2 device
891 * allows someone else to login instead. One second makes sense. */
892 msleep_interruptible(1000);
893 if (signal_pending(current)) {
894 SBP2_WARN("aborting sbp2_start_device due to event");
895 sbp2_remove_device(scsi_id);
896 return -EINTR;
897 }
Stefan Richtera237f352005-11-07 06:31:39 -0500898
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899 /*
900 * Login to the sbp-2 device
901 */
902 if (sbp2_login_device(scsi_id)) {
903 /* Login failed, just remove the device. */
904 sbp2_remove_device(scsi_id);
905 return -EBUSY;
906 }
907
908 /*
909 * Set max retries to something large on the device
910 */
911 sbp2_set_busy_timeout(scsi_id);
912
913 /*
914 * Do a SBP-2 fetch agent reset
915 */
916 sbp2_agent_reset(scsi_id, 1);
917
918 /*
919 * Get the max speed and packet size that we can use
920 */
921 sbp2_max_speed_and_size(scsi_id);
922
923 /* Add this device to the scsi layer now */
James Bottomley146f7262005-09-10 12:44:09 -0500924 error = scsi_add_device(scsi_id->scsi_host, 0, scsi_id->ud->id, 0);
925 if (error) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926 SBP2_ERR("scsi_add_device failed");
Stefan Richterdc3edd52005-12-12 23:03:30 -0500927 sbp2_logout_device(scsi_id);
928 sbp2_remove_device(scsi_id);
James Bottomley146f7262005-09-10 12:44:09 -0500929 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930 }
931
932 return 0;
Stefan Richtereaceec72005-12-13 11:05:05 -0500933
934alloc_fail:
935 SBP2_ERR("Could not allocate memory for scsi_id");
936 sbp2_remove_device(scsi_id);
937 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938}
939
940/*
941 * This function removes an sbp2 device from the sbp2scsi_host_info struct.
942 */
943static void sbp2_remove_device(struct scsi_id_instance_data *scsi_id)
944{
945 struct sbp2scsi_host_info *hi;
946
947 SBP2_DEBUG("sbp2_remove_device");
948
949 if (!scsi_id)
950 return;
951
952 hi = scsi_id->hi;
953
954 /* This will remove our scsi device aswell */
955 if (scsi_id->scsi_host) {
956 scsi_remove_host(scsi_id->scsi_host);
957 scsi_host_put(scsi_id->scsi_host);
958 }
959
960 sbp2util_remove_command_orb_pool(scsi_id);
961
962 list_del(&scsi_id->scsi_list);
963
964 if (scsi_id->login_response) {
965 pci_free_consistent(hi->host->pdev,
966 sizeof(struct sbp2_login_response),
967 scsi_id->login_response,
968 scsi_id->login_response_dma);
969 SBP2_DMA_FREE("single login FIFO");
970 }
971
972 if (scsi_id->login_orb) {
973 pci_free_consistent(hi->host->pdev,
974 sizeof(struct sbp2_login_orb),
975 scsi_id->login_orb,
976 scsi_id->login_orb_dma);
977 SBP2_DMA_FREE("single login ORB");
978 }
979
980 if (scsi_id->reconnect_orb) {
981 pci_free_consistent(hi->host->pdev,
982 sizeof(struct sbp2_reconnect_orb),
983 scsi_id->reconnect_orb,
984 scsi_id->reconnect_orb_dma);
985 SBP2_DMA_FREE("single reconnect orb");
986 }
987
988 if (scsi_id->logout_orb) {
989 pci_free_consistent(hi->host->pdev,
990 sizeof(struct sbp2_logout_orb),
991 scsi_id->logout_orb,
992 scsi_id->logout_orb_dma);
993 SBP2_DMA_FREE("single logout orb");
994 }
995
996 if (scsi_id->query_logins_orb) {
997 pci_free_consistent(hi->host->pdev,
998 sizeof(struct sbp2_query_logins_orb),
999 scsi_id->query_logins_orb,
1000 scsi_id->query_logins_orb_dma);
1001 SBP2_DMA_FREE("single query logins orb");
1002 }
1003
1004 if (scsi_id->query_logins_response) {
1005 pci_free_consistent(hi->host->pdev,
1006 sizeof(struct sbp2_query_logins_response),
1007 scsi_id->query_logins_response,
1008 scsi_id->query_logins_response_dma);
1009 SBP2_DMA_FREE("single query logins data");
1010 }
1011
Stefan Richter35bdddb2006-01-31 00:13:33 -05001012 if (scsi_id->status_fifo_addr)
1013 hpsb_unregister_addrspace(&sbp2_highlevel, hi->host,
1014 scsi_id->status_fifo_addr);
1015
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016 scsi_id->ud->device.driver_data = NULL;
1017
1018 SBP2_DEBUG("SBP-2 device removed, SCSI ID = %d", scsi_id->ud->id);
1019
1020 kfree(scsi_id);
1021}
1022
1023#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
1024/*
1025 * This function deals with physical dma write requests (for adapters that do not support
1026 * physical dma in hardware). Mostly just here for debugging...
1027 */
Stefan Richtera237f352005-11-07 06:31:39 -05001028static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid,
1029 int destid, quadlet_t *data, u64 addr,
1030 size_t length, u16 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031{
1032
Stefan Richtera237f352005-11-07 06:31:39 -05001033 /*
1034 * Manually put the data in the right place.
1035 */
1036 memcpy(bus_to_virt((u32) addr), data, length);
1037 sbp2util_packet_dump(data, length, "sbp2 phys dma write by device",
1038 (u32) addr);
1039 return RCODE_COMPLETE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040}
1041
1042/*
1043 * This function deals with physical dma read requests (for adapters that do not support
1044 * physical dma in hardware). Mostly just here for debugging...
1045 */
Stefan Richtera237f352005-11-07 06:31:39 -05001046static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid,
1047 quadlet_t *data, u64 addr, size_t length,
1048 u16 flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049{
1050
Stefan Richtera237f352005-11-07 06:31:39 -05001051 /*
1052 * Grab data from memory and send a read response.
1053 */
1054 memcpy(data, bus_to_virt((u32) addr), length);
1055 sbp2util_packet_dump(data, length, "sbp2 phys dma read by device",
1056 (u32) addr);
1057 return RCODE_COMPLETE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058}
1059#endif
1060
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061/**************************************
1062 * SBP-2 protocol related section
1063 **************************************/
1064
1065/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066 * This function queries the device for the maximum concurrent logins it
1067 * supports.
1068 */
1069static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id)
1070{
1071 struct sbp2scsi_host_info *hi = scsi_id->hi;
1072 quadlet_t data[2];
1073 int max_logins;
1074 int active_logins;
1075
1076 SBP2_DEBUG("sbp2_query_logins");
1077
1078 scsi_id->query_logins_orb->reserved1 = 0x0;
1079 scsi_id->query_logins_orb->reserved2 = 0x0;
1080
1081 scsi_id->query_logins_orb->query_response_lo = scsi_id->query_logins_response_dma;
1082 scsi_id->query_logins_orb->query_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
1083 SBP2_DEBUG("sbp2_query_logins: query_response_hi/lo initialized");
1084
1085 scsi_id->query_logins_orb->lun_misc = ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST);
1086 scsi_id->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1);
Ben Collinse309fc62005-11-07 06:31:34 -05001087 scsi_id->query_logins_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_lun);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088 SBP2_DEBUG("sbp2_query_logins: lun_misc initialized");
1089
1090 scsi_id->query_logins_orb->reserved_resp_length =
1091 ORB_SET_QUERY_LOGINS_RESP_LENGTH(sizeof(struct sbp2_query_logins_response));
1092 SBP2_DEBUG("sbp2_query_logins: reserved_resp_length initialized");
1093
Stefan Richter35bdddb2006-01-31 00:13:33 -05001094 scsi_id->query_logins_orb->status_fifo_hi =
1095 ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
1096 scsi_id->query_logins_orb->status_fifo_lo =
1097 ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098
1099 sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb));
1100
1101 SBP2_DEBUG("sbp2_query_logins: orb byte-swapped");
1102
1103 sbp2util_packet_dump(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb),
1104 "sbp2 query logins orb", scsi_id->query_logins_orb_dma);
1105
1106 memset(scsi_id->query_logins_response, 0, sizeof(struct sbp2_query_logins_response));
1107 memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
1108
1109 SBP2_DEBUG("sbp2_query_logins: query_logins_response/status FIFO memset");
1110
1111 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1112 data[1] = scsi_id->query_logins_orb_dma;
1113 sbp2util_cpu_to_be32_buffer(data, 8);
1114
1115 atomic_set(&scsi_id->sbp2_login_complete, 0);
1116
1117 SBP2_DEBUG("sbp2_query_logins: prepared to write");
1118 hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8);
1119 SBP2_DEBUG("sbp2_query_logins: written");
1120
1121 if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 2*HZ)) {
1122 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
Stefan Richtera237f352005-11-07 06:31:39 -05001123 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001124 }
1125
1126 if (scsi_id->status_block.ORB_offset_lo != scsi_id->query_logins_orb_dma) {
1127 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
Stefan Richtera237f352005-11-07 06:31:39 -05001128 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129 }
1130
1131 if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
1132 STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
1133 STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
1134
1135 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
Stefan Richtera237f352005-11-07 06:31:39 -05001136 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001137 }
1138
1139 sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_response, sizeof(struct sbp2_query_logins_response));
1140
1141 SBP2_DEBUG("length_max_logins = %x",
1142 (unsigned int)scsi_id->query_logins_response->length_max_logins);
1143
1144 SBP2_DEBUG("Query logins to SBP-2 device successful");
1145
1146 max_logins = RESPONSE_GET_MAX_LOGINS(scsi_id->query_logins_response->length_max_logins);
1147 SBP2_DEBUG("Maximum concurrent logins supported: %d", max_logins);
1148
1149 active_logins = RESPONSE_GET_ACTIVE_LOGINS(scsi_id->query_logins_response->length_max_logins);
1150 SBP2_DEBUG("Number of active logins: %d", active_logins);
1151
1152 if (active_logins >= max_logins) {
Stefan Richtera237f352005-11-07 06:31:39 -05001153 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001154 }
1155
1156 return 0;
1157}
1158
1159/*
1160 * This function is called in order to login to a particular SBP-2 device,
1161 * after a bus reset.
1162 */
1163static int sbp2_login_device(struct scsi_id_instance_data *scsi_id)
1164{
1165 struct sbp2scsi_host_info *hi = scsi_id->hi;
1166 quadlet_t data[2];
1167
1168 SBP2_DEBUG("sbp2_login_device");
1169
1170 if (!scsi_id->login_orb) {
1171 SBP2_DEBUG("sbp2_login_device: login_orb not alloc'd!");
Stefan Richtera237f352005-11-07 06:31:39 -05001172 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173 }
1174
1175 if (!exclusive_login) {
1176 if (sbp2_query_logins(scsi_id)) {
1177 SBP2_INFO("Device does not support any more concurrent logins");
Stefan Richtera237f352005-11-07 06:31:39 -05001178 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179 }
1180 }
1181
1182 /* Set-up login ORB, assume no password */
1183 scsi_id->login_orb->password_hi = 0;
1184 scsi_id->login_orb->password_lo = 0;
1185 SBP2_DEBUG("sbp2_login_device: password_hi/lo initialized");
1186
1187 scsi_id->login_orb->login_response_lo = scsi_id->login_response_dma;
1188 scsi_id->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
1189 SBP2_DEBUG("sbp2_login_device: login_response_hi/lo initialized");
1190
1191 scsi_id->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST);
1192 scsi_id->login_orb->lun_misc |= ORB_SET_RECONNECT(0); /* One second reconnect time */
1193 scsi_id->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(exclusive_login); /* Exclusive access to device */
1194 scsi_id->login_orb->lun_misc |= ORB_SET_NOTIFY(1); /* Notify us of login complete */
Ben Collinse309fc62005-11-07 06:31:34 -05001195 scsi_id->login_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_lun);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196 SBP2_DEBUG("sbp2_login_device: lun_misc initialized");
1197
1198 scsi_id->login_orb->passwd_resp_lengths =
1199 ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response));
1200 SBP2_DEBUG("sbp2_login_device: passwd_resp_lengths initialized");
1201
Stefan Richter35bdddb2006-01-31 00:13:33 -05001202 scsi_id->login_orb->status_fifo_hi =
1203 ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
1204 scsi_id->login_orb->status_fifo_lo =
1205 ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001206
1207 /*
1208 * Byte swap ORB if necessary
1209 */
1210 sbp2util_cpu_to_be32_buffer(scsi_id->login_orb, sizeof(struct sbp2_login_orb));
1211
1212 SBP2_DEBUG("sbp2_login_device: orb byte-swapped");
1213
1214 sbp2util_packet_dump(scsi_id->login_orb, sizeof(struct sbp2_login_orb),
1215 "sbp2 login orb", scsi_id->login_orb_dma);
1216
1217 /*
1218 * Initialize login response and status fifo
1219 */
1220 memset(scsi_id->login_response, 0, sizeof(struct sbp2_login_response));
1221 memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
1222
1223 SBP2_DEBUG("sbp2_login_device: login_response/status FIFO memset");
1224
1225 /*
1226 * Ok, let's write to the target's management agent register
1227 */
1228 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1229 data[1] = scsi_id->login_orb_dma;
1230 sbp2util_cpu_to_be32_buffer(data, 8);
1231
1232 atomic_set(&scsi_id->sbp2_login_complete, 0);
1233
1234 SBP2_DEBUG("sbp2_login_device: prepared to write to %08x",
1235 (unsigned int)scsi_id->sbp2_management_agent_addr);
1236 hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8);
1237 SBP2_DEBUG("sbp2_login_device: written");
1238
1239 /*
1240 * Wait for login status (up to 20 seconds)...
1241 */
1242 if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 20*HZ)) {
1243 SBP2_ERR("Error logging into SBP-2 device - login timed-out");
Stefan Richtera237f352005-11-07 06:31:39 -05001244 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245 }
1246
1247 /*
1248 * Sanity. Make sure status returned matches login orb.
1249 */
1250 if (scsi_id->status_block.ORB_offset_lo != scsi_id->login_orb_dma) {
1251 SBP2_ERR("Error logging into SBP-2 device - login timed-out");
Stefan Richtera237f352005-11-07 06:31:39 -05001252 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001253 }
1254
1255 /*
1256 * Check status
1257 */
1258 if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
1259 STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
1260 STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
1261
1262 SBP2_ERR("Error logging into SBP-2 device - login failed");
Stefan Richtera237f352005-11-07 06:31:39 -05001263 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264 }
1265
1266 /*
1267 * Byte swap the login response, for use when reconnecting or
1268 * logging out.
1269 */
1270 sbp2util_cpu_to_be32_buffer(scsi_id->login_response, sizeof(struct sbp2_login_response));
1271
1272 /*
1273 * Grab our command block agent address from the login response.
1274 */
1275 SBP2_DEBUG("command_block_agent_hi = %x",
1276 (unsigned int)scsi_id->login_response->command_block_agent_hi);
1277 SBP2_DEBUG("command_block_agent_lo = %x",
1278 (unsigned int)scsi_id->login_response->command_block_agent_lo);
1279
1280 scsi_id->sbp2_command_block_agent_addr =
1281 ((u64)scsi_id->login_response->command_block_agent_hi) << 32;
1282 scsi_id->sbp2_command_block_agent_addr |= ((u64)scsi_id->login_response->command_block_agent_lo);
1283 scsi_id->sbp2_command_block_agent_addr &= 0x0000ffffffffffffULL;
1284
1285 SBP2_INFO("Logged into SBP-2 device");
1286
Stefan Richtera237f352005-11-07 06:31:39 -05001287 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288
1289}
1290
1291/*
1292 * This function is called in order to logout from a particular SBP-2
1293 * device, usually called during driver unload.
1294 */
1295static int sbp2_logout_device(struct scsi_id_instance_data *scsi_id)
1296{
1297 struct sbp2scsi_host_info *hi = scsi_id->hi;
1298 quadlet_t data[2];
1299 int error;
1300
1301 SBP2_DEBUG("sbp2_logout_device");
1302
1303 /*
1304 * Set-up logout ORB
1305 */
1306 scsi_id->logout_orb->reserved1 = 0x0;
1307 scsi_id->logout_orb->reserved2 = 0x0;
1308 scsi_id->logout_orb->reserved3 = 0x0;
1309 scsi_id->logout_orb->reserved4 = 0x0;
1310
1311 scsi_id->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST);
1312 scsi_id->logout_orb->login_ID_misc |= ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID);
1313
1314 /* Notify us when complete */
1315 scsi_id->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1316
1317 scsi_id->logout_orb->reserved5 = 0x0;
Stefan Richter35bdddb2006-01-31 00:13:33 -05001318 scsi_id->logout_orb->status_fifo_hi =
1319 ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
1320 scsi_id->logout_orb->status_fifo_lo =
1321 ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001322
1323 /*
1324 * Byte swap ORB if necessary
1325 */
1326 sbp2util_cpu_to_be32_buffer(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb));
1327
1328 sbp2util_packet_dump(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb),
1329 "sbp2 logout orb", scsi_id->logout_orb_dma);
1330
1331 /*
1332 * Ok, let's write to the target's management agent register
1333 */
1334 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1335 data[1] = scsi_id->logout_orb_dma;
1336 sbp2util_cpu_to_be32_buffer(data, 8);
1337
1338 atomic_set(&scsi_id->sbp2_login_complete, 0);
1339
1340 error = hpsb_node_write(scsi_id->ne,
Stefan Richtera237f352005-11-07 06:31:39 -05001341 scsi_id->sbp2_management_agent_addr, data, 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001342 if (error)
1343 return error;
1344
1345 /* Wait for device to logout...1 second. */
1346 if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ))
1347 return -EIO;
1348
1349 SBP2_INFO("Logged out of SBP-2 device");
1350
Stefan Richtera237f352005-11-07 06:31:39 -05001351 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001352
1353}
1354
1355/*
1356 * This function is called in order to reconnect to a particular SBP-2
1357 * device, after a bus reset.
1358 */
1359static int sbp2_reconnect_device(struct scsi_id_instance_data *scsi_id)
1360{
1361 struct sbp2scsi_host_info *hi = scsi_id->hi;
1362 quadlet_t data[2];
1363 int error;
1364
1365 SBP2_DEBUG("sbp2_reconnect_device");
1366
1367 /*
1368 * Set-up reconnect ORB
1369 */
1370 scsi_id->reconnect_orb->reserved1 = 0x0;
1371 scsi_id->reconnect_orb->reserved2 = 0x0;
1372 scsi_id->reconnect_orb->reserved3 = 0x0;
1373 scsi_id->reconnect_orb->reserved4 = 0x0;
1374
1375 scsi_id->reconnect_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST);
1376 scsi_id->reconnect_orb->login_ID_misc |=
1377 ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID);
1378
1379 /* Notify us when complete */
1380 scsi_id->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1381
1382 scsi_id->reconnect_orb->reserved5 = 0x0;
Stefan Richter35bdddb2006-01-31 00:13:33 -05001383 scsi_id->reconnect_orb->status_fifo_hi =
1384 ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
1385 scsi_id->reconnect_orb->status_fifo_lo =
1386 ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001387
1388 /*
1389 * Byte swap ORB if necessary
1390 */
1391 sbp2util_cpu_to_be32_buffer(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb));
1392
1393 sbp2util_packet_dump(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb),
1394 "sbp2 reconnect orb", scsi_id->reconnect_orb_dma);
1395
1396 /*
1397 * Initialize status fifo
1398 */
1399 memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
1400
1401 /*
1402 * Ok, let's write to the target's management agent register
1403 */
1404 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1405 data[1] = scsi_id->reconnect_orb_dma;
1406 sbp2util_cpu_to_be32_buffer(data, 8);
1407
1408 atomic_set(&scsi_id->sbp2_login_complete, 0);
1409
1410 error = hpsb_node_write(scsi_id->ne,
Stefan Richtera237f352005-11-07 06:31:39 -05001411 scsi_id->sbp2_management_agent_addr, data, 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001412 if (error)
1413 return error;
1414
1415 /*
1416 * Wait for reconnect status (up to 1 second)...
1417 */
1418 if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ)) {
1419 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out");
Stefan Richtera237f352005-11-07 06:31:39 -05001420 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001421 }
1422
1423 /*
1424 * Sanity. Make sure status returned matches reconnect orb.
1425 */
1426 if (scsi_id->status_block.ORB_offset_lo != scsi_id->reconnect_orb_dma) {
1427 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out");
Stefan Richtera237f352005-11-07 06:31:39 -05001428 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001429 }
1430
1431 /*
1432 * Check status
1433 */
1434 if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
1435 STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
1436 STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
1437
1438 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect failed");
Stefan Richtera237f352005-11-07 06:31:39 -05001439 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001440 }
1441
1442 HPSB_DEBUG("Reconnected to SBP-2 device");
1443
Stefan Richtera237f352005-11-07 06:31:39 -05001444 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001445
1446}
1447
1448/*
1449 * This function is called in order to set the busy timeout (number of
1450 * retries to attempt) on the sbp2 device.
1451 */
1452static int sbp2_set_busy_timeout(struct scsi_id_instance_data *scsi_id)
1453{
1454 quadlet_t data;
1455
1456 SBP2_DEBUG("sbp2_set_busy_timeout");
1457
1458 /*
1459 * Ok, let's write to the target's busy timeout register
1460 */
1461 data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE);
1462
1463 if (hpsb_node_write(scsi_id->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4)) {
1464 SBP2_ERR("sbp2_set_busy_timeout error");
1465 }
1466
Stefan Richtera237f352005-11-07 06:31:39 -05001467 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001468}
1469
Linus Torvalds1da177e2005-04-16 15:20:36 -07001470/*
1471 * This function is called to parse sbp2 device's config rom unit
1472 * directory. Used to determine things like sbp2 management agent offset,
1473 * and command set used (SCSI or RBC).
1474 */
1475static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id,
1476 struct unit_directory *ud)
1477{
1478 struct csr1212_keyval *kv;
1479 struct csr1212_dentry *dentry;
1480 u64 management_agent_addr;
1481 u32 command_set_spec_id, command_set, unit_characteristics,
Stefan Richtera237f352005-11-07 06:31:39 -05001482 firmware_revision, workarounds;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001483 int i;
1484
1485 SBP2_DEBUG("sbp2_parse_unit_directory");
1486
1487 management_agent_addr = 0x0;
1488 command_set_spec_id = 0x0;
1489 command_set = 0x0;
1490 unit_characteristics = 0x0;
1491 firmware_revision = 0x0;
1492
1493 /* Handle different fields in the unit directory, based on keys */
1494 csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) {
1495 switch (kv->key.id) {
1496 case CSR1212_KV_ID_DEPENDENT_INFO:
1497 if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET) {
1498 /* Save off the management agent address */
1499 management_agent_addr =
Stefan Richtera237f352005-11-07 06:31:39 -05001500 CSR1212_REGISTER_SPACE_BASE +
1501 (kv->value.csr_offset << 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001502
1503 SBP2_DEBUG("sbp2_management_agent_addr = %x",
Stefan Richtera237f352005-11-07 06:31:39 -05001504 (unsigned int)management_agent_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001505 } else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
Stefan Richtera237f352005-11-07 06:31:39 -05001506 scsi_id->sbp2_lun =
1507 ORB_SET_LUN(kv->value.immediate);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001508 }
1509 break;
1510
1511 case SBP2_COMMAND_SET_SPEC_ID_KEY:
1512 /* Command spec organization */
1513 command_set_spec_id = kv->value.immediate;
1514 SBP2_DEBUG("sbp2_command_set_spec_id = %x",
Stefan Richtera237f352005-11-07 06:31:39 -05001515 (unsigned int)command_set_spec_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001516 break;
1517
1518 case SBP2_COMMAND_SET_KEY:
1519 /* Command set used by sbp2 device */
1520 command_set = kv->value.immediate;
1521 SBP2_DEBUG("sbp2_command_set = %x",
Stefan Richtera237f352005-11-07 06:31:39 -05001522 (unsigned int)command_set);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001523 break;
1524
1525 case SBP2_UNIT_CHARACTERISTICS_KEY:
1526 /*
1527 * Unit characterisitcs (orb related stuff
1528 * that I'm not yet paying attention to)
1529 */
1530 unit_characteristics = kv->value.immediate;
1531 SBP2_DEBUG("sbp2_unit_characteristics = %x",
Stefan Richtera237f352005-11-07 06:31:39 -05001532 (unsigned int)unit_characteristics);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001533 break;
1534
1535 case SBP2_FIRMWARE_REVISION_KEY:
1536 /* Firmware revision */
1537 firmware_revision = kv->value.immediate;
1538 if (force_inquiry_hack)
1539 SBP2_INFO("sbp2_firmware_revision = %x",
Stefan Richtera237f352005-11-07 06:31:39 -05001540 (unsigned int)firmware_revision);
1541 else
1542 SBP2_DEBUG("sbp2_firmware_revision = %x",
1543 (unsigned int)firmware_revision);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001544 break;
1545
1546 default:
1547 break;
1548 }
1549 }
1550
1551 /* This is the start of our broken device checking. We try to hack
1552 * around oddities and known defects. */
1553 workarounds = 0x0;
1554
1555 /* If the vendor id is 0xa0b8 (Symbios vendor id), then we have a
1556 * bridge with 128KB max transfer size limitation. For sanity, we
1557 * only voice this when the current max_sectors setting
1558 * exceeds the 128k limit. By default, that is not the case.
1559 *
1560 * It would be really nice if we could detect this before the scsi
1561 * host gets initialized. That way we can down-force the
1562 * max_sectors to account for it. That is not currently
1563 * possible. */
1564 if ((firmware_revision & 0xffff00) ==
1565 SBP2_128KB_BROKEN_FIRMWARE &&
1566 (max_sectors * 512) > (128*1024)) {
1567 SBP2_WARN("Node " NODE_BUS_FMT ": Bridge only supports 128KB max transfer size.",
1568 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid));
1569 SBP2_WARN("WARNING: Current max_sectors setting is larger than 128KB (%d sectors)!",
1570 max_sectors);
1571 workarounds |= SBP2_BREAKAGE_128K_MAX_TRANSFER;
1572 }
1573
1574 /* Check for a blacklisted set of devices that require us to force
1575 * a 36 byte host inquiry. This can be overriden as a module param
1576 * (to force all hosts). */
Stefan Richtera80614d2006-02-14 22:04:19 -05001577 for (i = 0; i < ARRAY_SIZE(sbp2_broken_inquiry_list); i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001578 if ((firmware_revision & 0xffff00) ==
1579 sbp2_broken_inquiry_list[i]) {
1580 SBP2_WARN("Node " NODE_BUS_FMT ": Using 36byte inquiry workaround",
1581 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid));
1582 workarounds |= SBP2_BREAKAGE_INQUIRY_HACK;
1583 break; /* No need to continue. */
1584 }
1585 }
1586
1587 /* If this is a logical unit directory entry, process the parent
1588 * to get the values. */
1589 if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) {
1590 struct unit_directory *parent_ud =
1591 container_of(ud->device.parent, struct unit_directory, device);
1592 sbp2_parse_unit_directory(scsi_id, parent_ud);
1593 } else {
1594 scsi_id->sbp2_management_agent_addr = management_agent_addr;
1595 scsi_id->sbp2_command_set_spec_id = command_set_spec_id;
1596 scsi_id->sbp2_command_set = command_set;
1597 scsi_id->sbp2_unit_characteristics = unit_characteristics;
1598 scsi_id->sbp2_firmware_revision = firmware_revision;
1599 scsi_id->workarounds = workarounds;
1600 if (ud->flags & UNIT_DIRECTORY_HAS_LUN)
Ben Collinse309fc62005-11-07 06:31:34 -05001601 scsi_id->sbp2_lun = ORB_SET_LUN(ud->lun);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001602 }
1603}
1604
1605/*
1606 * This function is called in order to determine the max speed and packet
1607 * size we can use in our ORBs. Note, that we (the driver and host) only
1608 * initiate the transaction. The SBP-2 device actually transfers the data
1609 * (by reading from the DMA area we tell it). This means that the SBP-2
1610 * device decides the actual maximum data it can transfer. We just tell it
1611 * the speed that it needs to use, and the max_rec the host supports, and
1612 * it takes care of the rest.
1613 */
1614static int sbp2_max_speed_and_size(struct scsi_id_instance_data *scsi_id)
1615{
1616 struct sbp2scsi_host_info *hi = scsi_id->hi;
1617
1618 SBP2_DEBUG("sbp2_max_speed_and_size");
1619
1620 /* Initial setting comes from the hosts speed map */
Stefan Richtera237f352005-11-07 06:31:39 -05001621 scsi_id->speed_code =
1622 hi->host->speed_map[NODEID_TO_NODE(hi->host->node_id) * 64 +
1623 NODEID_TO_NODE(scsi_id->ne->nodeid)];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001624
1625 /* Bump down our speed if the user requested it */
1626 if (scsi_id->speed_code > max_speed) {
1627 scsi_id->speed_code = max_speed;
1628 SBP2_ERR("Forcing SBP-2 max speed down to %s",
1629 hpsb_speedto_str[scsi_id->speed_code]);
1630 }
1631
1632 /* Payload size is the lesser of what our speed supports and what
1633 * our host supports. */
Stefan Richtera237f352005-11-07 06:31:39 -05001634 scsi_id->max_payload_size =
1635 min(sbp2_speedto_max_payload[scsi_id->speed_code],
1636 (u8) (hi->host->csr.max_rec - 1));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001637
1638 HPSB_DEBUG("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]",
1639 NODE_BUS_ARGS(hi->host, scsi_id->ne->nodeid),
1640 hpsb_speedto_str[scsi_id->speed_code],
Stefan Richtera237f352005-11-07 06:31:39 -05001641 1 << ((u32) scsi_id->max_payload_size + 2));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001642
Stefan Richtera237f352005-11-07 06:31:39 -05001643 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001644}
1645
1646/*
1647 * This function is called in order to perform a SBP-2 agent reset.
1648 */
1649static int sbp2_agent_reset(struct scsi_id_instance_data *scsi_id, int wait)
1650{
1651 quadlet_t data;
1652 u64 addr;
1653 int retval;
1654
1655 SBP2_DEBUG("sbp2_agent_reset");
1656
1657 /*
1658 * Ok, let's write to the target's management agent register
1659 */
1660 data = ntohl(SBP2_AGENT_RESET_DATA);
1661 addr = scsi_id->sbp2_command_block_agent_addr + SBP2_AGENT_RESET_OFFSET;
1662
1663 if (wait)
1664 retval = hpsb_node_write(scsi_id->ne, addr, &data, 4);
1665 else
1666 retval = sbp2util_node_write_no_wait(scsi_id->ne, addr, &data, 4);
1667
1668 if (retval < 0) {
1669 SBP2_ERR("hpsb_node_write failed.\n");
1670 return -EIO;
1671 }
1672
1673 /*
1674 * Need to make sure orb pointer is written on next command
1675 */
1676 scsi_id->last_orb = NULL;
1677
Stefan Richtera237f352005-11-07 06:31:39 -05001678 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001679}
1680
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001681static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb,
1682 struct sbp2scsi_host_info *hi,
1683 struct sbp2_command_info *command,
1684 unsigned int scsi_use_sg,
1685 struct scatterlist *sgpnt,
1686 u32 orb_direction,
1687 enum dma_data_direction dma_dir)
1688{
1689 command->dma_dir = dma_dir;
1690 orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1691 orb->misc |= ORB_SET_DIRECTION(orb_direction);
1692
1693 /* Special case if only one element (and less than 64KB in size) */
1694 if ((scsi_use_sg == 1) &&
1695 (sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) {
1696
1697 SBP2_DEBUG("Only one s/g element");
1698 command->dma_size = sgpnt[0].length;
1699 command->dma_type = CMD_DMA_PAGE;
1700 command->cmd_dma = pci_map_page(hi->host->pdev,
1701 sgpnt[0].page,
1702 sgpnt[0].offset,
1703 command->dma_size,
1704 command->dma_dir);
1705 SBP2_DMA_ALLOC("single page scatter element");
1706
1707 orb->data_descriptor_lo = command->cmd_dma;
1708 orb->misc |= ORB_SET_DATA_SIZE(command->dma_size);
1709
1710 } else {
1711 struct sbp2_unrestricted_page_table *sg_element =
1712 &command->scatter_gather_element[0];
1713 u32 sg_count, sg_len;
1714 dma_addr_t sg_addr;
1715 int i, count = pci_map_sg(hi->host->pdev, sgpnt, scsi_use_sg,
1716 dma_dir);
1717
1718 SBP2_DMA_ALLOC("scatter list");
1719
1720 command->dma_size = scsi_use_sg;
1721 command->sge_buffer = sgpnt;
1722
1723 /* use page tables (s/g) */
1724 orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1725 orb->data_descriptor_lo = command->sge_dma;
1726
1727 /*
1728 * Loop through and fill out our sbp-2 page tables
1729 * (and split up anything too large)
1730 */
1731 for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) {
1732 sg_len = sg_dma_len(sgpnt);
1733 sg_addr = sg_dma_address(sgpnt);
1734 while (sg_len) {
1735 sg_element[sg_count].segment_base_lo = sg_addr;
1736 if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
1737 sg_element[sg_count].length_segment_base_hi =
1738 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
1739 sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
1740 sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
1741 } else {
1742 sg_element[sg_count].length_segment_base_hi =
1743 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
1744 sg_len = 0;
1745 }
1746 sg_count++;
1747 }
1748 }
1749
1750 /* Number of page table (s/g) elements */
1751 orb->misc |= ORB_SET_DATA_SIZE(sg_count);
1752
1753 sbp2util_packet_dump(sg_element,
1754 (sizeof(struct sbp2_unrestricted_page_table)) * sg_count,
1755 "sbp2 s/g list", command->sge_dma);
1756
1757 /* Byte swap page tables if necessary */
1758 sbp2util_cpu_to_be32_buffer(sg_element,
1759 (sizeof(struct sbp2_unrestricted_page_table)) *
1760 sg_count);
1761 }
1762}
1763
1764static void sbp2_prep_command_orb_no_sg(struct sbp2_command_orb *orb,
1765 struct sbp2scsi_host_info *hi,
1766 struct sbp2_command_info *command,
1767 struct scatterlist *sgpnt,
1768 u32 orb_direction,
1769 unsigned int scsi_request_bufflen,
1770 void *scsi_request_buffer,
1771 enum dma_data_direction dma_dir)
1772{
1773 command->dma_dir = dma_dir;
1774 command->dma_size = scsi_request_bufflen;
1775 command->dma_type = CMD_DMA_SINGLE;
1776 command->cmd_dma = pci_map_single(hi->host->pdev, scsi_request_buffer,
1777 command->dma_size, command->dma_dir);
1778 orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1779 orb->misc |= ORB_SET_DIRECTION(orb_direction);
1780
1781 SBP2_DMA_ALLOC("single bulk");
1782
1783 /*
1784 * Handle case where we get a command w/o s/g enabled (but
1785 * check for transfers larger than 64K)
1786 */
1787 if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) {
1788
1789 orb->data_descriptor_lo = command->cmd_dma;
1790 orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen);
1791
1792 } else {
1793 struct sbp2_unrestricted_page_table *sg_element =
1794 &command->scatter_gather_element[0];
1795 u32 sg_count, sg_len;
1796 dma_addr_t sg_addr;
1797
1798 /*
1799 * Need to turn this into page tables, since the
1800 * buffer is too large.
1801 */
1802 orb->data_descriptor_lo = command->sge_dma;
1803
1804 /* Use page tables (s/g) */
1805 orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1806
1807 /*
1808 * fill out our sbp-2 page tables (and split up
1809 * the large buffer)
1810 */
1811 sg_count = 0;
1812 sg_len = scsi_request_bufflen;
1813 sg_addr = command->cmd_dma;
1814 while (sg_len) {
1815 sg_element[sg_count].segment_base_lo = sg_addr;
1816 if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
1817 sg_element[sg_count].length_segment_base_hi =
1818 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
1819 sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
1820 sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
1821 } else {
1822 sg_element[sg_count].length_segment_base_hi =
1823 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
1824 sg_len = 0;
1825 }
1826 sg_count++;
1827 }
1828
1829 /* Number of page table (s/g) elements */
1830 orb->misc |= ORB_SET_DATA_SIZE(sg_count);
1831
1832 sbp2util_packet_dump(sg_element,
1833 (sizeof(struct sbp2_unrestricted_page_table)) * sg_count,
1834 "sbp2 s/g list", command->sge_dma);
1835
1836 /* Byte swap page tables if necessary */
1837 sbp2util_cpu_to_be32_buffer(sg_element,
1838 (sizeof(struct sbp2_unrestricted_page_table)) *
1839 sg_count);
1840 }
1841}
1842
Linus Torvalds1da177e2005-04-16 15:20:36 -07001843/*
1844 * This function is called to create the actual command orb and s/g list
1845 * out of the scsi command itself.
1846 */
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001847static void sbp2_create_command_orb(struct scsi_id_instance_data *scsi_id,
1848 struct sbp2_command_info *command,
1849 unchar *scsi_cmd,
1850 unsigned int scsi_use_sg,
1851 unsigned int scsi_request_bufflen,
1852 void *scsi_request_buffer,
1853 enum dma_data_direction dma_dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001854{
1855 struct sbp2scsi_host_info *hi = scsi_id->hi;
Stefan Richtera237f352005-11-07 06:31:39 -05001856 struct scatterlist *sgpnt = (struct scatterlist *)scsi_request_buffer;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001857 struct sbp2_command_orb *command_orb = &command->command_orb;
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001858 u32 orb_direction;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001859
1860 /*
1861 * Set-up our command ORB..
1862 *
1863 * NOTE: We're doing unrestricted page tables (s/g), as this is
1864 * best performance (at least with the devices I have). This means
1865 * that data_size becomes the number of s/g elements, and
1866 * page_size should be zero (for unrestricted).
1867 */
1868 command_orb->next_ORB_hi = ORB_SET_NULL_PTR(1);
1869 command_orb->next_ORB_lo = 0x0;
1870 command_orb->misc = ORB_SET_MAX_PAYLOAD(scsi_id->max_payload_size);
1871 command_orb->misc |= ORB_SET_SPEED(scsi_id->speed_code);
Stefan Richtera237f352005-11-07 06:31:39 -05001872 command_orb->misc |= ORB_SET_NOTIFY(1); /* Notify us when complete */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001873
Stefan Richter43863eb2005-12-12 23:03:24 -05001874 if (dma_dir == DMA_NONE)
Stefan Richtera237f352005-11-07 06:31:39 -05001875 orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
Stefan Richter43863eb2005-12-12 23:03:24 -05001876 else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen)
Stefan Richtera237f352005-11-07 06:31:39 -05001877 orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA;
Stefan Richter43863eb2005-12-12 23:03:24 -05001878 else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen)
Stefan Richtera237f352005-11-07 06:31:39 -05001879 orb_direction = ORB_DIRECTION_READ_FROM_MEDIA;
Stefan Richter43863eb2005-12-12 23:03:24 -05001880 else {
1881 SBP2_WARN("Falling back to DMA_NONE");
1882 orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001883 }
1884
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001885 /* Set-up our pagetable stuff */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001886 if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001887 SBP2_DEBUG("No data transfer");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001888 command_orb->data_descriptor_hi = 0x0;
1889 command_orb->data_descriptor_lo = 0x0;
1890 command_orb->misc |= ORB_SET_DIRECTION(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001891 } else if (scsi_use_sg) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001892 SBP2_DEBUG("Use scatter/gather");
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001893 sbp2_prep_command_orb_sg(command_orb, hi, command, scsi_use_sg,
1894 sgpnt, orb_direction, dma_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001895 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001896 SBP2_DEBUG("No scatter/gather");
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001897 sbp2_prep_command_orb_no_sg(command_orb, hi, command, sgpnt,
1898 orb_direction, scsi_request_bufflen,
1899 scsi_request_buffer, dma_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001900 }
1901
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001902 /* Byte swap command ORB if necessary */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001903 sbp2util_cpu_to_be32_buffer(command_orb, sizeof(struct sbp2_command_orb));
1904
Stefan Richtercf8d2c02005-12-13 11:05:03 -05001905 /* Put our scsi command in the command ORB */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001906 memset(command_orb->cdb, 0, 12);
1907 memcpy(command_orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001908}
1909
1910/*
1911 * This function is called in order to begin a regular SBP-2 command.
1912 */
1913static int sbp2_link_orb_command(struct scsi_id_instance_data *scsi_id,
1914 struct sbp2_command_info *command)
1915{
1916 struct sbp2scsi_host_info *hi = scsi_id->hi;
1917 struct sbp2_command_orb *command_orb = &command->command_orb;
1918 struct node_entry *ne = scsi_id->ne;
1919 u64 addr;
1920
1921 outstanding_orb_incr;
1922 SBP2_ORB_DEBUG("sending command orb %p, total orbs = %x",
Stefan Richtera237f352005-11-07 06:31:39 -05001923 command_orb, global_outstanding_command_orbs);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001924
1925 pci_dma_sync_single_for_device(hi->host->pdev, command->command_orb_dma,
1926 sizeof(struct sbp2_command_orb),
1927 PCI_DMA_BIDIRECTIONAL);
1928 pci_dma_sync_single_for_device(hi->host->pdev, command->sge_dma,
1929 sizeof(command->scatter_gather_element),
1930 PCI_DMA_BIDIRECTIONAL);
1931 /*
1932 * Check to see if there are any previous orbs to use
1933 */
1934 if (scsi_id->last_orb == NULL) {
1935 quadlet_t data[2];
1936
1937 /*
1938 * Ok, let's write to the target's management agent register
1939 */
1940 addr = scsi_id->sbp2_command_block_agent_addr + SBP2_ORB_POINTER_OFFSET;
1941 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1942 data[1] = command->command_orb_dma;
1943 sbp2util_cpu_to_be32_buffer(data, 8);
1944
1945 SBP2_ORB_DEBUG("write command agent, command orb %p", command_orb);
1946
1947 if (sbp2util_node_write_no_wait(ne, addr, data, 8) < 0) {
1948 SBP2_ERR("sbp2util_node_write_no_wait failed.\n");
1949 return -EIO;
1950 }
1951
1952 SBP2_ORB_DEBUG("write command agent complete");
1953
1954 scsi_id->last_orb = command_orb;
1955 scsi_id->last_orb_dma = command->command_orb_dma;
1956
1957 } else {
1958 quadlet_t data;
1959
1960 /*
1961 * We have an orb already sent (maybe or maybe not
1962 * processed) that we can append this orb to. So do so,
1963 * and ring the doorbell. Have to be very careful
1964 * modifying these next orb pointers, as they are accessed
1965 * both by the sbp2 device and us.
1966 */
1967 scsi_id->last_orb->next_ORB_lo =
Stefan Richtera237f352005-11-07 06:31:39 -05001968 cpu_to_be32(command->command_orb_dma);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001969 /* Tells hardware that this pointer is valid */
1970 scsi_id->last_orb->next_ORB_hi = 0x0;
Stefan Richtera237f352005-11-07 06:31:39 -05001971 pci_dma_sync_single_for_device(hi->host->pdev,
1972 scsi_id->last_orb_dma,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001973 sizeof(struct sbp2_command_orb),
1974 PCI_DMA_BIDIRECTIONAL);
1975
1976 /*
1977 * Ring the doorbell
1978 */
1979 data = cpu_to_be32(command->command_orb_dma);
1980 addr = scsi_id->sbp2_command_block_agent_addr + SBP2_DOORBELL_OFFSET;
1981
1982 SBP2_ORB_DEBUG("ring doorbell, command orb %p", command_orb);
1983
1984 if (sbp2util_node_write_no_wait(ne, addr, &data, 4) < 0) {
1985 SBP2_ERR("sbp2util_node_write_no_wait failed");
Stefan Richtera237f352005-11-07 06:31:39 -05001986 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001987 }
1988
1989 scsi_id->last_orb = command_orb;
1990 scsi_id->last_orb_dma = command->command_orb_dma;
1991
1992 }
Stefan Richtera237f352005-11-07 06:31:39 -05001993 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001994}
1995
1996/*
1997 * This function is called in order to begin a regular SBP-2 command.
1998 */
1999static int sbp2_send_command(struct scsi_id_instance_data *scsi_id,
2000 struct scsi_cmnd *SCpnt,
2001 void (*done)(struct scsi_cmnd *))
2002{
2003 unchar *cmd = (unchar *) SCpnt->cmnd;
2004 unsigned int request_bufflen = SCpnt->request_bufflen;
2005 struct sbp2_command_info *command;
2006
2007 SBP2_DEBUG("sbp2_send_command");
2008#if (CONFIG_IEEE1394_SBP2_DEBUG >= 2) || defined(CONFIG_IEEE1394_SBP2_PACKET_DUMP)
2009 printk("[scsi command]\n ");
2010 scsi_print_command(SCpnt);
2011#endif
2012 SBP2_DEBUG("SCSI transfer size = %x", request_bufflen);
2013 SBP2_DEBUG("SCSI s/g elements = %x", (unsigned int)SCpnt->use_sg);
2014
2015 /*
2016 * Allocate a command orb and s/g structure
2017 */
2018 command = sbp2util_allocate_command_orb(scsi_id, SCpnt, done);
2019 if (!command) {
Stefan Richtera237f352005-11-07 06:31:39 -05002020 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002021 }
2022
2023 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002024 * Now actually fill in the comamnd orb and sbp2 s/g list
2025 */
2026 sbp2_create_command_orb(scsi_id, command, cmd, SCpnt->use_sg,
2027 request_bufflen, SCpnt->request_buffer,
2028 SCpnt->sc_data_direction);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002029
2030 sbp2util_packet_dump(&command->command_orb, sizeof(struct sbp2_command_orb),
2031 "sbp2 command orb", command->command_orb_dma);
2032
2033 /*
2034 * Initialize status fifo
2035 */
2036 memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
2037
2038 /*
2039 * Link up the orb, and ring the doorbell if needed
2040 */
2041 sbp2_link_orb_command(scsi_id, command);
2042
Stefan Richtera237f352005-11-07 06:31:39 -05002043 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002044}
2045
Linus Torvalds1da177e2005-04-16 15:20:36 -07002046/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002047 * Translates SBP-2 status into SCSI sense data for check conditions
2048 */
2049static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, unchar *sense_data)
2050{
2051 SBP2_DEBUG("sbp2_status_to_sense_data");
2052
2053 /*
2054 * Ok, it's pretty ugly... ;-)
2055 */
2056 sense_data[0] = 0x70;
2057 sense_data[1] = 0x0;
2058 sense_data[2] = sbp2_status[9];
2059 sense_data[3] = sbp2_status[12];
2060 sense_data[4] = sbp2_status[13];
2061 sense_data[5] = sbp2_status[14];
2062 sense_data[6] = sbp2_status[15];
2063 sense_data[7] = 10;
2064 sense_data[8] = sbp2_status[16];
2065 sense_data[9] = sbp2_status[17];
2066 sense_data[10] = sbp2_status[18];
2067 sense_data[11] = sbp2_status[19];
2068 sense_data[12] = sbp2_status[10];
2069 sense_data[13] = sbp2_status[11];
2070 sense_data[14] = sbp2_status[20];
2071 sense_data[15] = sbp2_status[21];
2072
Stefan Richtera237f352005-11-07 06:31:39 -05002073 return sbp2_status[8] & 0x3f; /* return scsi status */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002074}
2075
2076/*
2077 * This function is called after a command is completed, in order to do any necessary SBP-2
2078 * response data translations for the SCSI stack
2079 */
Stefan Richtera237f352005-11-07 06:31:39 -05002080static void sbp2_check_sbp2_response(struct scsi_id_instance_data *scsi_id,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002081 struct scsi_cmnd *SCpnt)
2082{
2083 u8 *scsi_buf = SCpnt->request_buffer;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002084
2085 SBP2_DEBUG("sbp2_check_sbp2_response");
2086
Al Viroe30809f2006-02-08 14:09:00 -05002087 if (SCpnt->cmnd[0] == INQUIRY && (SCpnt->cmnd[1] & 3) == 0) {
Stefan Richtera237f352005-11-07 06:31:39 -05002088 /*
2089 * Make sure data length is ok. Minimum length is 36 bytes
2090 */
2091 if (scsi_buf[4] == 0) {
2092 scsi_buf[4] = 36 - 5;
2093 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002094
Stefan Richtera237f352005-11-07 06:31:39 -05002095 /*
2096 * Fix ansi revision and response data format
2097 */
2098 scsi_buf[2] |= 2;
2099 scsi_buf[3] = (scsi_buf[3] & 0xf0) | 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002100 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002101}
2102
2103/*
2104 * This function deals with status writes from the SBP-2 device
2105 */
2106static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, int destid,
2107 quadlet_t *data, u64 addr, size_t length, u16 fl)
2108{
2109 struct sbp2scsi_host_info *hi;
2110 struct scsi_id_instance_data *scsi_id = NULL, *scsi_id_tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002111 struct scsi_cmnd *SCpnt = NULL;
2112 u32 scsi_status = SBP2_SCSI_STATUS_GOOD;
2113 struct sbp2_command_info *command;
Jody McIntyre79456192005-11-07 06:29:39 -05002114 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002115
2116 SBP2_DEBUG("sbp2_handle_status_write");
2117
2118 sbp2util_packet_dump(data, length, "sbp2 status write by device", (u32)addr);
2119
2120 if (!host) {
2121 SBP2_ERR("host is NULL - this is bad!");
Stefan Richtera237f352005-11-07 06:31:39 -05002122 return RCODE_ADDRESS_ERROR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002123 }
2124
2125 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
2126
2127 if (!hi) {
2128 SBP2_ERR("host info is NULL - this is bad!");
Stefan Richtera237f352005-11-07 06:31:39 -05002129 return RCODE_ADDRESS_ERROR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002130 }
2131
2132 /*
Stefan Richter35bdddb2006-01-31 00:13:33 -05002133 * Find our scsi_id structure by looking at the status fifo address
2134 * written to by the sbp2 device.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002135 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002136 list_for_each_entry(scsi_id_tmp, &hi->scsi_ids, scsi_list) {
Stefan Richter35bdddb2006-01-31 00:13:33 -05002137 if (scsi_id_tmp->ne->nodeid == nodeid &&
2138 scsi_id_tmp->status_fifo_addr == addr) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002139 scsi_id = scsi_id_tmp;
2140 break;
2141 }
2142 }
2143
2144 if (!scsi_id) {
2145 SBP2_ERR("scsi_id is NULL - device is gone?");
Stefan Richtera237f352005-11-07 06:31:39 -05002146 return RCODE_ADDRESS_ERROR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002147 }
2148
2149 /*
2150 * Put response into scsi_id status fifo...
2151 */
2152 memcpy(&scsi_id->status_block, data, length);
2153
2154 /*
2155 * Byte swap first two quadlets (8 bytes) of status for processing
2156 */
2157 sbp2util_be32_to_cpu_buffer(&scsi_id->status_block, 8);
2158
2159 /*
2160 * Handle command ORB status here if necessary. First, need to match status with command.
2161 */
2162 command = sbp2util_find_command_for_orb(scsi_id, scsi_id->status_block.ORB_offset_lo);
2163 if (command) {
2164
2165 SBP2_DEBUG("Found status for command ORB");
2166 pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma,
2167 sizeof(struct sbp2_command_orb),
2168 PCI_DMA_BIDIRECTIONAL);
2169 pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma,
2170 sizeof(command->scatter_gather_element),
2171 PCI_DMA_BIDIRECTIONAL);
2172
2173 SBP2_ORB_DEBUG("matched command orb %p", &command->command_orb);
2174 outstanding_orb_decr;
2175
2176 /*
2177 * Matched status with command, now grab scsi command pointers and check status
2178 */
2179 SCpnt = command->Current_SCpnt;
2180 sbp2util_mark_command_completed(scsi_id, command);
2181
2182 if (SCpnt) {
2183
2184 /*
2185 * See if the target stored any scsi status information
2186 */
2187 if (STATUS_GET_LENGTH(scsi_id->status_block.ORB_offset_hi_misc) > 1) {
2188 /*
2189 * Translate SBP-2 status to SCSI sense data
2190 */
2191 SBP2_DEBUG("CHECK CONDITION");
2192 scsi_status = sbp2_status_to_sense_data((unchar *)&scsi_id->status_block, SCpnt->sense_buffer);
2193 }
2194
2195 /*
2196 * Check to see if the dead bit is set. If so, we'll have to initiate
2197 * a fetch agent reset.
2198 */
2199 if (STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc)) {
2200
2201 /*
2202 * Initiate a fetch agent reset.
2203 */
2204 SBP2_DEBUG("Dead bit set - initiating fetch agent reset");
2205 sbp2_agent_reset(scsi_id, 0);
2206 }
2207
2208 SBP2_ORB_DEBUG("completing command orb %p", &command->command_orb);
2209 }
2210
2211 /*
2212 * Check here to see if there are no commands in-use. If there are none, we can
2213 * null out last orb so that next time around we write directly to the orb pointer...
2214 * Quick start saves one 1394 bus transaction.
2215 */
Jody McIntyre79456192005-11-07 06:29:39 -05002216 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002217 if (list_empty(&scsi_id->sbp2_command_orb_inuse)) {
2218 scsi_id->last_orb = NULL;
2219 }
Jody McIntyre79456192005-11-07 06:29:39 -05002220 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002221
2222 } else {
2223
2224 /*
2225 * It's probably a login/logout/reconnect status.
2226 */
2227 if ((scsi_id->login_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
2228 (scsi_id->query_logins_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
2229 (scsi_id->reconnect_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
2230 (scsi_id->logout_orb_dma == scsi_id->status_block.ORB_offset_lo)) {
2231 atomic_set(&scsi_id->sbp2_login_complete, 1);
2232 }
2233 }
2234
2235 if (SCpnt) {
2236
2237 /* Complete the SCSI command. */
2238 SBP2_DEBUG("Completing SCSI command");
2239 sbp2scsi_complete_command(scsi_id, scsi_status, SCpnt,
2240 command->Current_done);
2241 SBP2_ORB_DEBUG("command orb completed");
2242 }
2243
Stefan Richtera237f352005-11-07 06:31:39 -05002244 return RCODE_COMPLETE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002245}
2246
Linus Torvalds1da177e2005-04-16 15:20:36 -07002247/**************************************
2248 * SCSI interface related section
2249 **************************************/
2250
2251/*
2252 * This routine is the main request entry routine for doing I/O. It is
2253 * called from the scsi stack directly.
2254 */
2255static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt,
2256 void (*done)(struct scsi_cmnd *))
2257{
2258 struct scsi_id_instance_data *scsi_id =
2259 (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
2260 struct sbp2scsi_host_info *hi;
Jody McIntyreabd559b2005-09-30 11:59:06 -07002261 int result = DID_NO_CONNECT << 16;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002262
2263 SBP2_DEBUG("sbp2scsi_queuecommand");
2264
Jody McIntyreabd559b2005-09-30 11:59:06 -07002265 if (!sbp2util_node_is_available(scsi_id))
2266 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002267
2268 hi = scsi_id->hi;
2269
2270 if (!hi) {
2271 SBP2_ERR("sbp2scsi_host_info is NULL - this is bad!");
Jody McIntyreabd559b2005-09-30 11:59:06 -07002272 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002273 }
2274
2275 /*
2276 * Until we handle multiple luns, just return selection time-out
2277 * to any IO directed at non-zero LUNs
2278 */
Jody McIntyreabd559b2005-09-30 11:59:06 -07002279 if (SCpnt->device->lun)
2280 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002281
2282 /*
2283 * Check for request sense command, and handle it here
2284 * (autorequest sense)
2285 */
2286 if (SCpnt->cmnd[0] == REQUEST_SENSE) {
2287 SBP2_DEBUG("REQUEST_SENSE");
2288 memcpy(SCpnt->request_buffer, SCpnt->sense_buffer, SCpnt->request_bufflen);
2289 memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer));
2290 sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_GOOD, SCpnt, done);
Jody McIntyreabd559b2005-09-30 11:59:06 -07002291 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002292 }
2293
2294 /*
2295 * Check to see if we are in the middle of a bus reset.
2296 */
2297 if (!hpsb_node_entry_valid(scsi_id->ne)) {
2298 SBP2_ERR("Bus reset in progress - rejecting command");
Jody McIntyreabd559b2005-09-30 11:59:06 -07002299 result = DID_BUS_BUSY << 16;
2300 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002301 }
2302
2303 /*
Stefan Richter43863eb2005-12-12 23:03:24 -05002304 * Bidirectional commands are not yet implemented,
2305 * and unknown transfer direction not handled.
2306 */
2307 if (SCpnt->sc_data_direction == DMA_BIDIRECTIONAL) {
2308 SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command");
2309 result = DID_ERROR << 16;
2310 goto done;
2311 }
2312
2313 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002314 * Try and send our SCSI command
2315 */
2316 if (sbp2_send_command(scsi_id, SCpnt, done)) {
2317 SBP2_ERR("Error sending SCSI command");
2318 sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_SELECTION_TIMEOUT,
2319 SCpnt, done);
2320 }
Jody McIntyreabd559b2005-09-30 11:59:06 -07002321 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002322
Jody McIntyreabd559b2005-09-30 11:59:06 -07002323done:
2324 SCpnt->result = result;
2325 done(SCpnt);
2326 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002327}
2328
2329/*
2330 * This function is called in order to complete all outstanding SBP-2
2331 * commands (in case of resets, etc.).
2332 */
2333static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id,
2334 u32 status)
2335{
2336 struct sbp2scsi_host_info *hi = scsi_id->hi;
2337 struct list_head *lh;
2338 struct sbp2_command_info *command;
Jody McIntyre79456192005-11-07 06:29:39 -05002339 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002340
2341 SBP2_DEBUG("sbp2scsi_complete_all_commands");
2342
Jody McIntyre79456192005-11-07 06:29:39 -05002343 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002344 while (!list_empty(&scsi_id->sbp2_command_orb_inuse)) {
2345 SBP2_DEBUG("Found pending command to complete");
2346 lh = scsi_id->sbp2_command_orb_inuse.next;
2347 command = list_entry(lh, struct sbp2_command_info, list);
2348 pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma,
2349 sizeof(struct sbp2_command_orb),
2350 PCI_DMA_BIDIRECTIONAL);
2351 pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma,
2352 sizeof(command->scatter_gather_element),
2353 PCI_DMA_BIDIRECTIONAL);
2354 sbp2util_mark_command_completed(scsi_id, command);
2355 if (command->Current_SCpnt) {
2356 command->Current_SCpnt->result = status << 16;
2357 command->Current_done(command->Current_SCpnt);
2358 }
2359 }
Jody McIntyre79456192005-11-07 06:29:39 -05002360 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002361
2362 return;
2363}
2364
2365/*
2366 * This function is called in order to complete a regular SBP-2 command.
2367 *
2368 * This can be called in interrupt context.
2369 */
2370static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id,
2371 u32 scsi_status, struct scsi_cmnd *SCpnt,
2372 void (*done)(struct scsi_cmnd *))
2373{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002374 SBP2_DEBUG("sbp2scsi_complete_command");
2375
2376 /*
2377 * Sanity
2378 */
2379 if (!SCpnt) {
2380 SBP2_ERR("SCpnt is NULL");
2381 return;
2382 }
2383
2384 /*
2385 * If a bus reset is in progress and there was an error, don't
2386 * complete the command, just let it get retried at the end of the
2387 * bus reset.
2388 */
Stefan Richtera237f352005-11-07 06:31:39 -05002389 if (!hpsb_node_entry_valid(scsi_id->ne)
2390 && (scsi_status != SBP2_SCSI_STATUS_GOOD)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002391 SBP2_ERR("Bus reset in progress - retry command later");
2392 return;
2393 }
Stefan Richtera237f352005-11-07 06:31:39 -05002394
Linus Torvalds1da177e2005-04-16 15:20:36 -07002395 /*
2396 * Switch on scsi status
2397 */
2398 switch (scsi_status) {
Stefan Richtera237f352005-11-07 06:31:39 -05002399 case SBP2_SCSI_STATUS_GOOD:
2400 SCpnt->result = DID_OK;
2401 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002402
Stefan Richtera237f352005-11-07 06:31:39 -05002403 case SBP2_SCSI_STATUS_BUSY:
2404 SBP2_ERR("SBP2_SCSI_STATUS_BUSY");
2405 SCpnt->result = DID_BUS_BUSY << 16;
2406 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002407
Stefan Richtera237f352005-11-07 06:31:39 -05002408 case SBP2_SCSI_STATUS_CHECK_CONDITION:
2409 SBP2_DEBUG("SBP2_SCSI_STATUS_CHECK_CONDITION");
2410 SCpnt->result = CHECK_CONDITION << 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002411
Stefan Richtera237f352005-11-07 06:31:39 -05002412 /*
2413 * Debug stuff
2414 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002415#if CONFIG_IEEE1394_SBP2_DEBUG >= 1
Stefan Richtera237f352005-11-07 06:31:39 -05002416 scsi_print_command(SCpnt);
2417 scsi_print_sense("bh", SCpnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002418#endif
2419
Stefan Richtera237f352005-11-07 06:31:39 -05002420 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002421
Stefan Richtera237f352005-11-07 06:31:39 -05002422 case SBP2_SCSI_STATUS_SELECTION_TIMEOUT:
2423 SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT");
2424 SCpnt->result = DID_NO_CONNECT << 16;
2425 scsi_print_command(SCpnt);
2426 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002427
Stefan Richtera237f352005-11-07 06:31:39 -05002428 case SBP2_SCSI_STATUS_CONDITION_MET:
2429 case SBP2_SCSI_STATUS_RESERVATION_CONFLICT:
2430 case SBP2_SCSI_STATUS_COMMAND_TERMINATED:
2431 SBP2_ERR("Bad SCSI status = %x", scsi_status);
2432 SCpnt->result = DID_ERROR << 16;
2433 scsi_print_command(SCpnt);
2434 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002435
Stefan Richtera237f352005-11-07 06:31:39 -05002436 default:
2437 SBP2_ERR("Unsupported SCSI status = %x", scsi_status);
2438 SCpnt->result = DID_ERROR << 16;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002439 }
2440
2441 /*
2442 * Take care of any sbp2 response data mucking here (RBC stuff, etc.)
2443 */
2444 if (SCpnt->result == DID_OK) {
2445 sbp2_check_sbp2_response(scsi_id, SCpnt);
2446 }
2447
2448 /*
2449 * If a bus reset is in progress and there was an error, complete
2450 * the command as busy so that it will get retried.
2451 */
Stefan Richtera237f352005-11-07 06:31:39 -05002452 if (!hpsb_node_entry_valid(scsi_id->ne)
2453 && (scsi_status != SBP2_SCSI_STATUS_GOOD)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002454 SBP2_ERR("Completing command with busy (bus reset)");
2455 SCpnt->result = DID_BUS_BUSY << 16;
2456 }
2457
2458 /*
2459 * If a unit attention occurs, return busy status so it gets
2460 * retried... it could have happened because of a 1394 bus reset
2461 * or hot-plug...
2462 */
2463#if 0
2464 if ((scsi_status == SBP2_SCSI_STATUS_CHECK_CONDITION) &&
2465 (SCpnt->sense_buffer[2] == UNIT_ATTENTION)) {
2466 SBP2_DEBUG("UNIT ATTENTION - return busy");
2467 SCpnt->result = DID_BUS_BUSY << 16;
2468 }
2469#endif
2470
2471 /*
2472 * Tell scsi stack that we're done with this command
2473 */
Stefan Richtera237f352005-11-07 06:31:39 -05002474 done(SCpnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002475}
2476
Jody McIntyreabd559b2005-09-30 11:59:06 -07002477static int sbp2scsi_slave_alloc(struct scsi_device *sdev)
2478{
Stefan Richtera80614d2006-02-14 22:04:19 -05002479 struct scsi_id_instance_data *scsi_id =
2480 (struct scsi_id_instance_data *)sdev->host->hostdata[0];
2481
2482 scsi_id->sdev = sdev;
2483
2484 if (force_inquiry_hack ||
2485 scsi_id->workarounds & SBP2_BREAKAGE_INQUIRY_HACK) {
2486 sdev->inquiry_len = 36;
2487 sdev->skip_ms_page_8 = 1;
2488 }
Jody McIntyreabd559b2005-09-30 11:59:06 -07002489 return 0;
2490}
2491
Jody McIntyreabd559b2005-09-30 11:59:06 -07002492static int sbp2scsi_slave_configure(struct scsi_device *sdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002493{
2494 blk_queue_dma_alignment(sdev->request_queue, (512 - 1));
Ben Collins365c7862005-11-07 06:31:24 -05002495 sdev->use_10_for_rw = 1;
2496 sdev->use_10_for_ms = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002497 return 0;
2498}
2499
Jody McIntyreabd559b2005-09-30 11:59:06 -07002500static void sbp2scsi_slave_destroy(struct scsi_device *sdev)
2501{
2502 ((struct scsi_id_instance_data *)sdev->host->hostdata[0])->sdev = NULL;
2503 return;
2504}
2505
Linus Torvalds1da177e2005-04-16 15:20:36 -07002506/*
2507 * Called by scsi stack when something has really gone wrong. Usually
2508 * called when a command has timed-out for some reason.
2509 */
2510static int sbp2scsi_abort(struct scsi_cmnd *SCpnt)
2511{
2512 struct scsi_id_instance_data *scsi_id =
2513 (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
2514 struct sbp2scsi_host_info *hi = scsi_id->hi;
2515 struct sbp2_command_info *command;
2516
2517 SBP2_ERR("aborting sbp2 command");
2518 scsi_print_command(SCpnt);
2519
Jody McIntyreabd559b2005-09-30 11:59:06 -07002520 if (sbp2util_node_is_available(scsi_id)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002521
2522 /*
2523 * Right now, just return any matching command structures
2524 * to the free pool.
2525 */
2526 command = sbp2util_find_command_for_SCpnt(scsi_id, SCpnt);
2527 if (command) {
2528 SBP2_DEBUG("Found command to abort");
2529 pci_dma_sync_single_for_cpu(hi->host->pdev,
2530 command->command_orb_dma,
2531 sizeof(struct sbp2_command_orb),
2532 PCI_DMA_BIDIRECTIONAL);
2533 pci_dma_sync_single_for_cpu(hi->host->pdev,
2534 command->sge_dma,
2535 sizeof(command->scatter_gather_element),
2536 PCI_DMA_BIDIRECTIONAL);
2537 sbp2util_mark_command_completed(scsi_id, command);
2538 if (command->Current_SCpnt) {
2539 command->Current_SCpnt->result = DID_ABORT << 16;
2540 command->Current_done(command->Current_SCpnt);
2541 }
2542 }
2543
2544 /*
2545 * Initiate a fetch agent reset.
2546 */
2547 sbp2_agent_reset(scsi_id, 0);
2548 sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY);
2549 }
2550
Stefan Richtera237f352005-11-07 06:31:39 -05002551 return SUCCESS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002552}
2553
2554/*
2555 * Called by scsi stack when something has really gone wrong.
2556 */
Jody McIntyreabd559b2005-09-30 11:59:06 -07002557static int sbp2scsi_reset(struct scsi_cmnd *SCpnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002558{
2559 struct scsi_id_instance_data *scsi_id =
2560 (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
2561
2562 SBP2_ERR("reset requested");
2563
Jody McIntyreabd559b2005-09-30 11:59:06 -07002564 if (sbp2util_node_is_available(scsi_id)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002565 SBP2_ERR("Generating sbp2 fetch agent reset");
2566 sbp2_agent_reset(scsi_id, 0);
2567 }
2568
Jody McIntyreabd559b2005-09-30 11:59:06 -07002569 return SUCCESS;
Jeff Garzik 94d0e7b2005-05-28 07:55:48 -04002570}
2571
Stefan Richtera237f352005-11-07 06:31:39 -05002572static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev,
2573 struct device_attribute *attr,
2574 char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002575{
2576 struct scsi_device *sdev;
2577 struct scsi_id_instance_data *scsi_id;
2578 int lun;
2579
2580 if (!(sdev = to_scsi_device(dev)))
2581 return 0;
2582
2583 if (!(scsi_id = (struct scsi_id_instance_data *)sdev->host->hostdata[0]))
2584 return 0;
2585
Ben Collinse309fc62005-11-07 06:31:34 -05002586 lun = ORB_SET_LUN(scsi_id->sbp2_lun);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002587
2588 return sprintf(buf, "%016Lx:%d:%d\n", (unsigned long long)scsi_id->ne->guid,
2589 scsi_id->ud->id, lun);
2590}
2591static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL);
2592
2593static struct device_attribute *sbp2_sysfs_sdev_attrs[] = {
2594 &dev_attr_ieee1394_id,
2595 NULL
2596};
2597
2598MODULE_AUTHOR("Ben Collins <bcollins@debian.org>");
2599MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver");
2600MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME);
2601MODULE_LICENSE("GPL");
2602
2603/* SCSI host template */
2604static struct scsi_host_template scsi_driver_template = {
2605 .module = THIS_MODULE,
2606 .name = "SBP-2 IEEE-1394",
2607 .proc_name = SBP2_DEVICE_NAME,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002608 .queuecommand = sbp2scsi_queuecommand,
2609 .eh_abort_handler = sbp2scsi_abort,
2610 .eh_device_reset_handler = sbp2scsi_reset,
Jody McIntyreabd559b2005-09-30 11:59:06 -07002611 .slave_alloc = sbp2scsi_slave_alloc,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002612 .slave_configure = sbp2scsi_slave_configure,
Jody McIntyreabd559b2005-09-30 11:59:06 -07002613 .slave_destroy = sbp2scsi_slave_destroy,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002614 .this_id = -1,
2615 .sg_tablesize = SG_ALL,
2616 .use_clustering = ENABLE_CLUSTERING,
2617 .cmd_per_lun = SBP2_MAX_CMDS,
2618 .can_queue = SBP2_MAX_CMDS,
2619 .emulated = 1,
2620 .sdev_attrs = sbp2_sysfs_sdev_attrs,
2621};
2622
2623static int sbp2_module_init(void)
2624{
2625 int ret;
2626
2627 SBP2_DEBUG("sbp2_module_init");
2628
Linus Torvalds1da177e2005-04-16 15:20:36 -07002629 /* Module load debug option to force one command at a time (serializing I/O) */
2630 if (serialize_io) {
Jody McIntyre2bab3592005-09-30 11:59:07 -07002631 SBP2_INFO("Driver forced to serialize I/O (serialize_io=1)");
2632 SBP2_INFO("Try serialize_io=0 for better performance");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002633 scsi_driver_template.can_queue = 1;
2634 scsi_driver_template.cmd_per_lun = 1;
2635 }
2636
2637 /* Set max sectors (module load option). Default is 255 sectors. */
2638 scsi_driver_template.max_sectors = max_sectors;
2639
Linus Torvalds1da177e2005-04-16 15:20:36 -07002640 /* Register our high level driver with 1394 stack */
2641 hpsb_register_highlevel(&sbp2_highlevel);
2642
2643 ret = hpsb_register_protocol(&sbp2_driver);
2644 if (ret) {
2645 SBP2_ERR("Failed to register protocol");
2646 hpsb_unregister_highlevel(&sbp2_highlevel);
2647 return ret;
2648 }
2649
2650 return 0;
2651}
2652
2653static void __exit sbp2_module_exit(void)
2654{
2655 SBP2_DEBUG("sbp2_module_exit");
2656
2657 hpsb_unregister_protocol(&sbp2_driver);
2658
2659 hpsb_unregister_highlevel(&sbp2_highlevel);
2660}
2661
2662module_init(sbp2_module_init);
2663module_exit(sbp2_module_exit);