ia64/linux-2.6.18-xen.hg

view drivers/ieee1394/sbp2.c @ 893:f994bfe9b93b

linux/blktap2: reduce TLB flush scope

c/s 885 added very coarse TLB flushing. Since these flushes always
follow single page updates, single page flushes (when available) are
sufficient.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
author Keir Fraser <keir.fraser@citrix.com>
date Thu Jun 04 10:32:57 2009 +0100 (2009-06-04)
parents 831230e53067
children
line source
1 /*
2 * sbp2.c - SBP-2 protocol driver for IEEE-1394
3 *
4 * Copyright (C) 2000 James Goodwin, Filanet Corporation (www.filanet.com)
5 * jamesg@filanet.com (JSG)
6 *
7 * Copyright (C) 2003 Ben Collins <bcollins@debian.org>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software Foundation,
21 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 */
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 */
41 #include <linux/kernel.h>
42 #include <linux/list.h>
43 #include <linux/string.h>
44 #include <linux/stringify.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>
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>
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>
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"
83 /*
84 * Module load parameter definitions
85 */
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 */
95 static int max_speed = IEEE1394_SPEED_MAX;
96 module_param(max_speed, int, 0644);
97 MODULE_PARM_DESC(max_speed, "Force max speed (3 = 800mb, 2 = 400mb, 1 = 200mb, 0 = 100mb)");
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.
103 *
104 * TODO: Make this configurable per device.
105 */
106 static int serialize_io = 1;
107 module_param(serialize_io, int, 0444);
108 MODULE_PARM_DESC(serialize_io, "Serialize I/O coming from scsi drivers (default = 1, faster = 0)");
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 */
118 static int max_sectors = SBP2_MAX_SECTORS;
119 module_param(max_sectors, int, 0444);
120 MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported (default = "
121 __stringify(SBP2_MAX_SECTORS) ")");
123 /*
124 * Exclusive login to sbp2 device? In most cases, the sbp2 driver should
125 * do an exclusive login, as it's generally unsafe to have two hosts
126 * talking to a single sbp2 device at the same time (filesystem coherency,
127 * etc.). If you're running an sbp2 device that supports multiple logins,
128 * and you're either running read-only filesystems or some sort of special
129 * filesystem supporting multiple hosts, e.g. OpenGFS, Oracle Cluster
130 * File System, or Lustre, then set exclusive_login to zero.
131 *
132 * So far only bridges from Oxford Semiconductor are known to support
133 * concurrent logins. Depending on firmware, four or two concurrent logins
134 * are possible on OXFW911 and newer Oxsemi bridges.
135 */
136 static int exclusive_login = 1;
137 module_param(exclusive_login, int, 0644);
138 MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device (default = 1)");
140 /*
141 * If any of the following workarounds is required for your device to work,
142 * please submit the kernel messages logged by sbp2 to the linux1394-devel
143 * mailing list.
144 *
145 * - 128kB max transfer
146 * Limit transfer size. Necessary for some old bridges.
147 *
148 * - 36 byte inquiry
149 * When scsi_mod probes the device, let the inquiry command look like that
150 * from MS Windows.
151 *
152 * - skip mode page 8
153 * Suppress sending of mode_sense for mode page 8 if the device pretends to
154 * support the SCSI Primary Block commands instead of Reduced Block Commands.
155 *
156 * - fix capacity
157 * Tell sd_mod to correct the last sector number reported by read_capacity.
158 * Avoids access beyond actual disk limits on devices with an off-by-one bug.
159 * Don't use this with devices which don't have this bug.
160 *
161 * - override internal blacklist
162 * Instead of adding to the built-in blacklist, use only the workarounds
163 * specified in the module load parameter.
164 * Useful if a blacklist entry interfered with a non-broken device.
165 */
166 static int sbp2_default_workarounds;
167 module_param_named(workarounds, sbp2_default_workarounds, int, 0644);
168 MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0"
169 ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS)
170 ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36)
171 ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8)
172 ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY)
173 ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE)
174 ", or a combination)");
176 /* legacy parameter */
177 static int force_inquiry_hack;
178 module_param(force_inquiry_hack, int, 0644);
179 MODULE_PARM_DESC(force_inquiry_hack, "Deprecated, use 'workarounds'");
181 /*
182 * Export information about protocols/devices supported by this driver.
183 */
184 static struct ieee1394_device_id sbp2_id_table[] = {
185 {
186 .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
187 .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff,
188 .version = SBP2_SW_VERSION_ENTRY & 0xffffff},
189 {}
190 };
192 MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table);
194 /*
195 * Debug levels, configured via kernel config, or enable here.
196 */
198 #define CONFIG_IEEE1394_SBP2_DEBUG 0
199 /* #define CONFIG_IEEE1394_SBP2_DEBUG_ORBS */
200 /* #define CONFIG_IEEE1394_SBP2_DEBUG_DMA */
201 /* #define CONFIG_IEEE1394_SBP2_DEBUG 1 */
202 /* #define CONFIG_IEEE1394_SBP2_DEBUG 2 */
203 /* #define CONFIG_IEEE1394_SBP2_PACKET_DUMP */
205 #ifdef CONFIG_IEEE1394_SBP2_DEBUG_ORBS
206 #define SBP2_ORB_DEBUG(fmt, args...) HPSB_ERR("sbp2(%s): "fmt, __FUNCTION__, ## args)
207 static u32 global_outstanding_command_orbs = 0;
208 #define outstanding_orb_incr global_outstanding_command_orbs++
209 #define outstanding_orb_decr global_outstanding_command_orbs--
210 #else
211 #define SBP2_ORB_DEBUG(fmt, args...)
212 #define outstanding_orb_incr
213 #define outstanding_orb_decr
214 #endif
216 #ifdef CONFIG_IEEE1394_SBP2_DEBUG_DMA
217 #define SBP2_DMA_ALLOC(fmt, args...) \
218 HPSB_ERR("sbp2(%s)alloc(%d): "fmt, __FUNCTION__, \
219 ++global_outstanding_dmas, ## args)
220 #define SBP2_DMA_FREE(fmt, args...) \
221 HPSB_ERR("sbp2(%s)free(%d): "fmt, __FUNCTION__, \
222 --global_outstanding_dmas, ## args)
223 static u32 global_outstanding_dmas = 0;
224 #else
225 #define SBP2_DMA_ALLOC(fmt, args...)
226 #define SBP2_DMA_FREE(fmt, args...)
227 #endif
229 #if CONFIG_IEEE1394_SBP2_DEBUG >= 2
230 #define SBP2_DEBUG(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
231 #define SBP2_INFO(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
232 #define SBP2_NOTICE(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
233 #define SBP2_WARN(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
234 #elif CONFIG_IEEE1394_SBP2_DEBUG == 1
235 #define SBP2_DEBUG(fmt, args...) HPSB_DEBUG("sbp2: "fmt, ## args)
236 #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
237 #define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args)
238 #define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args)
239 #else
240 #define SBP2_DEBUG(fmt, args...)
241 #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
242 #define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args)
243 #define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args)
244 #endif
246 #define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
247 #define SBP2_DEBUG_ENTER() SBP2_DEBUG("%s", __FUNCTION__)
249 /*
250 * Globals
251 */
253 static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id,
254 u32 status);
256 static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id,
257 u32 scsi_status, struct scsi_cmnd *SCpnt,
258 void (*done)(struct scsi_cmnd *));
260 static struct scsi_host_template scsi_driver_template;
262 static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC };
264 static void sbp2_host_reset(struct hpsb_host *host);
266 static int sbp2_probe(struct device *dev);
267 static int sbp2_remove(struct device *dev);
268 static int sbp2_update(struct unit_directory *ud);
270 static struct hpsb_highlevel sbp2_highlevel = {
271 .name = SBP2_DEVICE_NAME,
272 .host_reset = sbp2_host_reset,
273 };
275 static struct hpsb_address_ops sbp2_ops = {
276 .write = sbp2_handle_status_write
277 };
279 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
280 static struct hpsb_address_ops sbp2_physdma_ops = {
281 .read = sbp2_handle_physdma_read,
282 .write = sbp2_handle_physdma_write,
283 };
284 #endif
286 static struct hpsb_protocol_driver sbp2_driver = {
287 .name = "SBP2 Driver",
288 .id_table = sbp2_id_table,
289 .update = sbp2_update,
290 .driver = {
291 .name = SBP2_DEVICE_NAME,
292 .bus = &ieee1394_bus_type,
293 .probe = sbp2_probe,
294 .remove = sbp2_remove,
295 },
296 };
298 /*
299 * List of devices with known bugs.
300 *
301 * The firmware_revision field, masked with 0xffff00, is the best indicator
302 * for the type of bridge chip of a device. It yields a few false positives
303 * but this did not break correctly behaving devices so far.
304 */
305 static const struct {
306 u32 firmware_revision;
307 u32 model_id;
308 unsigned workarounds;
309 } sbp2_workarounds_table[] = {
310 /* DViCO Momobay CX-1 with TSB42AA9 bridge */ {
311 .firmware_revision = 0x002800,
312 .model_id = 0x001010,
313 .workarounds = SBP2_WORKAROUND_INQUIRY_36 |
314 SBP2_WORKAROUND_MODE_SENSE_8,
315 },
316 /* Initio bridges, actually only needed for some older ones */ {
317 .firmware_revision = 0x000200,
318 .workarounds = SBP2_WORKAROUND_INQUIRY_36,
319 },
320 /* Symbios bridge */ {
321 .firmware_revision = 0xa0b800,
322 .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS,
323 },
324 /*
325 * Note about the following Apple iPod blacklist entries:
326 *
327 * There are iPods (2nd gen, 3rd gen) with model_id==0. Since our
328 * matching logic treats 0 as a wildcard, we cannot match this ID
329 * without rewriting the matching routine. Fortunately these iPods
330 * do not feature the read_capacity bug according to one report.
331 * Read_capacity behaviour as well as model_id could change due to
332 * Apple-supplied firmware updates though.
333 */
334 /* iPod 4th generation */ {
335 .firmware_revision = 0x0a2700,
336 .model_id = 0x000021,
337 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
338 },
339 /* iPod mini */ {
340 .firmware_revision = 0x0a2700,
341 .model_id = 0x000023,
342 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
343 },
344 /* iPod Photo */ {
345 .firmware_revision = 0x0a2700,
346 .model_id = 0x00007e,
347 .workarounds = SBP2_WORKAROUND_FIX_CAPACITY,
348 }
349 };
351 /**************************************
352 * General utility functions
353 **************************************/
355 #ifndef __BIG_ENDIAN
356 /*
357 * Converts a buffer from be32 to cpu byte ordering. Length is in bytes.
358 */
359 static __inline__ void sbp2util_be32_to_cpu_buffer(void *buffer, int length)
360 {
361 u32 *temp = buffer;
363 for (length = (length >> 2); length--; )
364 temp[length] = be32_to_cpu(temp[length]);
366 return;
367 }
369 /*
370 * Converts a buffer from cpu to be32 byte ordering. Length is in bytes.
371 */
372 static __inline__ void sbp2util_cpu_to_be32_buffer(void *buffer, int length)
373 {
374 u32 *temp = buffer;
376 for (length = (length >> 2); length--; )
377 temp[length] = cpu_to_be32(temp[length]);
379 return;
380 }
381 #else /* BIG_ENDIAN */
382 /* Why waste the cpu cycles? */
383 #define sbp2util_be32_to_cpu_buffer(x,y)
384 #define sbp2util_cpu_to_be32_buffer(x,y)
385 #endif
387 #ifdef CONFIG_IEEE1394_SBP2_PACKET_DUMP
388 /*
389 * Debug packet dump routine. Length is in bytes.
390 */
391 static void sbp2util_packet_dump(void *buffer, int length, char *dump_name,
392 u32 dump_phys_addr)
393 {
394 int i;
395 unsigned char *dump = buffer;
397 if (!dump || !length || !dump_name)
398 return;
400 if (dump_phys_addr)
401 printk("[%s, 0x%x]", dump_name, dump_phys_addr);
402 else
403 printk("[%s]", dump_name);
404 for (i = 0; i < length; i++) {
405 if (i > 0x3f) {
406 printk("\n ...");
407 break;
408 }
409 if ((i & 0x3) == 0)
410 printk(" ");
411 if ((i & 0xf) == 0)
412 printk("\n ");
413 printk("%02x ", (int)dump[i]);
414 }
415 printk("\n");
417 return;
418 }
419 #else
420 #define sbp2util_packet_dump(w,x,y,z)
421 #endif
423 /*
424 * Goofy routine that basically does a down_timeout function.
425 */
426 static int sbp2util_down_timeout(atomic_t *done, int timeout)
427 {
428 int i;
430 for (i = timeout; (i > 0 && atomic_read(done) == 0); i-= HZ/10) {
431 if (msleep_interruptible(100)) /* 100ms */
432 return 1;
433 }
434 return (i > 0) ? 0 : 1;
435 }
437 /* Free's an allocated packet */
438 static void sbp2_free_packet(struct hpsb_packet *packet)
439 {
440 hpsb_free_tlabel(packet);
441 hpsb_free_packet(packet);
442 }
444 /* This is much like hpsb_node_write(), except it ignores the response
445 * subaction and returns immediately. Can be used from interrupts.
446 */
447 static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr,
448 quadlet_t *buffer, size_t length)
449 {
450 struct hpsb_packet *packet;
452 packet = hpsb_make_writepacket(ne->host, ne->nodeid,
453 addr, buffer, length);
454 if (!packet)
455 return -ENOMEM;
457 hpsb_set_packet_complete_task(packet,
458 (void (*)(void *))sbp2_free_packet,
459 packet);
461 hpsb_node_fill_packet(ne, packet);
463 if (hpsb_send_packet(packet) < 0) {
464 sbp2_free_packet(packet);
465 return -EIO;
466 }
468 return 0;
469 }
471 /*
472 * This function is called to create a pool of command orbs used for
473 * command processing. It is called when a new sbp2 device is detected.
474 */
475 static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data *scsi_id)
476 {
477 struct sbp2scsi_host_info *hi = scsi_id->hi;
478 int i;
479 unsigned long flags, orbs;
480 struct sbp2_command_info *command;
482 orbs = serialize_io ? 2 : SBP2_MAX_CMDS;
484 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
485 for (i = 0; i < orbs; i++) {
486 command = kzalloc(sizeof(*command), GFP_ATOMIC);
487 if (!command) {
488 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock,
489 flags);
490 return -ENOMEM;
491 }
492 command->command_orb_dma =
493 pci_map_single(hi->host->pdev, &command->command_orb,
494 sizeof(struct sbp2_command_orb),
495 PCI_DMA_BIDIRECTIONAL);
496 SBP2_DMA_ALLOC("single command orb DMA");
497 command->sge_dma =
498 pci_map_single(hi->host->pdev,
499 &command->scatter_gather_element,
500 sizeof(command->scatter_gather_element),
501 PCI_DMA_BIDIRECTIONAL);
502 SBP2_DMA_ALLOC("scatter_gather_element");
503 INIT_LIST_HEAD(&command->list);
504 list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed);
505 }
506 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
507 return 0;
508 }
510 /*
511 * This function is called to delete a pool of command orbs.
512 */
513 static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data *scsi_id)
514 {
515 struct hpsb_host *host = scsi_id->hi->host;
516 struct list_head *lh, *next;
517 struct sbp2_command_info *command;
518 unsigned long flags;
520 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
521 if (!list_empty(&scsi_id->sbp2_command_orb_completed)) {
522 list_for_each_safe(lh, next, &scsi_id->sbp2_command_orb_completed) {
523 command = list_entry(lh, struct sbp2_command_info, list);
525 /* Release our generic DMA's */
526 pci_unmap_single(host->pdev, command->command_orb_dma,
527 sizeof(struct sbp2_command_orb),
528 PCI_DMA_BIDIRECTIONAL);
529 SBP2_DMA_FREE("single command orb DMA");
530 pci_unmap_single(host->pdev, command->sge_dma,
531 sizeof(command->scatter_gather_element),
532 PCI_DMA_BIDIRECTIONAL);
533 SBP2_DMA_FREE("scatter_gather_element");
535 kfree(command);
536 }
537 }
538 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
539 return;
540 }
542 /*
543 * This function finds the sbp2_command for a given outstanding command
544 * orb.Only looks at the inuse list.
545 */
546 static struct sbp2_command_info *sbp2util_find_command_for_orb(
547 struct scsi_id_instance_data *scsi_id, dma_addr_t orb)
548 {
549 struct sbp2_command_info *command;
550 unsigned long flags;
552 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
553 if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) {
554 list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) {
555 if (command->command_orb_dma == orb) {
556 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
557 return command;
558 }
559 }
560 }
561 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
563 SBP2_ORB_DEBUG("could not match command orb %x", (unsigned int)orb);
565 return NULL;
566 }
568 /*
569 * This function finds the sbp2_command for a given outstanding SCpnt.
570 * Only looks at the inuse list.
571 * Must be called with scsi_id->sbp2_command_orb_lock held.
572 */
573 static struct sbp2_command_info *sbp2util_find_command_for_SCpnt(
574 struct scsi_id_instance_data *scsi_id, void *SCpnt)
575 {
576 struct sbp2_command_info *command;
578 if (!list_empty(&scsi_id->sbp2_command_orb_inuse))
579 list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list)
580 if (command->Current_SCpnt == SCpnt)
581 return command;
582 return NULL;
583 }
585 /*
586 * This function allocates a command orb used to send a scsi command.
587 */
588 static struct sbp2_command_info *sbp2util_allocate_command_orb(
589 struct scsi_id_instance_data *scsi_id,
590 struct scsi_cmnd *Current_SCpnt,
591 void (*Current_done)(struct scsi_cmnd *))
592 {
593 struct list_head *lh;
594 struct sbp2_command_info *command = NULL;
595 unsigned long flags;
597 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
598 if (!list_empty(&scsi_id->sbp2_command_orb_completed)) {
599 lh = scsi_id->sbp2_command_orb_completed.next;
600 list_del(lh);
601 command = list_entry(lh, struct sbp2_command_info, list);
602 command->Current_done = Current_done;
603 command->Current_SCpnt = Current_SCpnt;
604 list_add_tail(&command->list, &scsi_id->sbp2_command_orb_inuse);
605 } else {
606 SBP2_ERR("%s: no orbs available", __FUNCTION__);
607 }
608 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
609 return command;
610 }
612 /* Free our DMA's */
613 static void sbp2util_free_command_dma(struct sbp2_command_info *command)
614 {
615 struct scsi_id_instance_data *scsi_id =
616 (struct scsi_id_instance_data *)command->Current_SCpnt->device->host->hostdata[0];
617 struct hpsb_host *host;
619 if (!scsi_id) {
620 SBP2_ERR("%s: scsi_id == NULL", __FUNCTION__);
621 return;
622 }
624 host = scsi_id->ud->ne->host;
626 if (command->cmd_dma) {
627 if (command->dma_type == CMD_DMA_SINGLE) {
628 pci_unmap_single(host->pdev, command->cmd_dma,
629 command->dma_size, command->dma_dir);
630 SBP2_DMA_FREE("single bulk");
631 } else if (command->dma_type == CMD_DMA_PAGE) {
632 pci_unmap_page(host->pdev, command->cmd_dma,
633 command->dma_size, command->dma_dir);
634 SBP2_DMA_FREE("single page");
635 } /* XXX: Check for CMD_DMA_NONE bug */
636 command->dma_type = CMD_DMA_NONE;
637 command->cmd_dma = 0;
638 }
640 if (command->sge_buffer) {
641 pci_unmap_sg(host->pdev, command->sge_buffer,
642 command->dma_size, command->dma_dir);
643 SBP2_DMA_FREE("scatter list");
644 command->sge_buffer = NULL;
645 }
646 }
648 /*
649 * This function moves a command to the completed orb list.
650 * Must be called with scsi_id->sbp2_command_orb_lock held.
651 */
652 static void sbp2util_mark_command_completed(
653 struct scsi_id_instance_data *scsi_id,
654 struct sbp2_command_info *command)
655 {
656 list_del(&command->list);
657 sbp2util_free_command_dma(command);
658 list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed);
659 }
661 /*
662 * Is scsi_id valid? Is the 1394 node still present?
663 */
664 static inline int sbp2util_node_is_available(struct scsi_id_instance_data *scsi_id)
665 {
666 return scsi_id && scsi_id->ne && !scsi_id->ne->in_limbo;
667 }
669 /*********************************************
670 * IEEE-1394 core driver stack related section
671 *********************************************/
672 static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud);
674 static int sbp2_probe(struct device *dev)
675 {
676 struct unit_directory *ud;
677 struct scsi_id_instance_data *scsi_id;
679 SBP2_DEBUG_ENTER();
681 ud = container_of(dev, struct unit_directory, device);
683 /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s)
684 * instead. */
685 if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY)
686 return -ENODEV;
688 scsi_id = sbp2_alloc_device(ud);
690 if (!scsi_id)
691 return -ENOMEM;
693 sbp2_parse_unit_directory(scsi_id, ud);
695 return sbp2_start_device(scsi_id);
696 }
698 static int sbp2_remove(struct device *dev)
699 {
700 struct unit_directory *ud;
701 struct scsi_id_instance_data *scsi_id;
702 struct scsi_device *sdev;
704 SBP2_DEBUG_ENTER();
706 ud = container_of(dev, struct unit_directory, device);
707 scsi_id = ud->device.driver_data;
708 if (!scsi_id)
709 return 0;
711 if (scsi_id->scsi_host) {
712 /* Get rid of enqueued commands if there is no chance to
713 * send them. */
714 if (!sbp2util_node_is_available(scsi_id))
715 sbp2scsi_complete_all_commands(scsi_id, DID_NO_CONNECT);
716 /* scsi_remove_device() will trigger shutdown functions of SCSI
717 * highlevel drivers which would deadlock if blocked. */
718 scsi_unblock_requests(scsi_id->scsi_host);
719 }
720 sdev = scsi_id->sdev;
721 if (sdev) {
722 scsi_id->sdev = NULL;
723 scsi_remove_device(sdev);
724 }
726 sbp2_logout_device(scsi_id);
727 sbp2_remove_device(scsi_id);
729 return 0;
730 }
732 static int sbp2_update(struct unit_directory *ud)
733 {
734 struct scsi_id_instance_data *scsi_id = ud->device.driver_data;
736 SBP2_DEBUG_ENTER();
738 if (sbp2_reconnect_device(scsi_id)) {
740 /*
741 * Ok, reconnect has failed. Perhaps we didn't
742 * reconnect fast enough. Try doing a regular login, but
743 * first do a logout just in case of any weirdness.
744 */
745 sbp2_logout_device(scsi_id);
747 if (sbp2_login_device(scsi_id)) {
748 /* Login failed too, just fail, and the backend
749 * will call our sbp2_remove for us */
750 SBP2_ERR("Failed to reconnect to sbp2 device!");
751 return -EBUSY;
752 }
753 }
755 /* Set max retries to something large on the device. */
756 sbp2_set_busy_timeout(scsi_id);
758 /* Do a SBP-2 fetch agent reset. */
759 sbp2_agent_reset(scsi_id, 1);
761 /* Get the max speed and packet size that we can use. */
762 sbp2_max_speed_and_size(scsi_id);
764 /* Complete any pending commands with busy (so they get
765 * retried) and remove them from our queue
766 */
767 sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY);
769 /* Make sure we unblock requests (since this is likely after a bus
770 * reset). */
771 scsi_unblock_requests(scsi_id->scsi_host);
773 return 0;
774 }
776 /* This functions is called by the sbp2_probe, for each new device. We now
777 * allocate one scsi host for each scsi_id (unit directory). */
778 static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud)
779 {
780 struct sbp2scsi_host_info *hi;
781 struct Scsi_Host *scsi_host = NULL;
782 struct scsi_id_instance_data *scsi_id = NULL;
784 SBP2_DEBUG_ENTER();
786 scsi_id = kzalloc(sizeof(*scsi_id), GFP_KERNEL);
787 if (!scsi_id) {
788 SBP2_ERR("failed to create scsi_id");
789 goto failed_alloc;
790 }
792 scsi_id->ne = ud->ne;
793 scsi_id->ud = ud;
794 scsi_id->speed_code = IEEE1394_SPEED_100;
795 scsi_id->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100];
796 scsi_id->status_fifo_addr = CSR1212_INVALID_ADDR_SPACE;
797 atomic_set(&scsi_id->sbp2_login_complete, 0);
798 INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_inuse);
799 INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_completed);
800 INIT_LIST_HEAD(&scsi_id->scsi_list);
801 spin_lock_init(&scsi_id->sbp2_command_orb_lock);
803 ud->device.driver_data = scsi_id;
805 hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host);
806 if (!hi) {
807 hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host, sizeof(*hi));
808 if (!hi) {
809 SBP2_ERR("failed to allocate hostinfo");
810 goto failed_alloc;
811 }
812 SBP2_DEBUG("sbp2_alloc_device: allocated hostinfo");
813 hi->host = ud->ne->host;
814 INIT_LIST_HEAD(&hi->scsi_ids);
816 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
817 /* Handle data movement if physical dma is not
818 * enabled or not supported on host controller */
819 if (!hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host,
820 &sbp2_physdma_ops,
821 0x0ULL, 0xfffffffcULL)) {
822 SBP2_ERR("failed to register lower 4GB address range");
823 goto failed_alloc;
824 }
825 #endif
826 }
828 /* Prevent unloading of the 1394 host */
829 if (!try_module_get(hi->host->driver->owner)) {
830 SBP2_ERR("failed to get a reference on 1394 host driver");
831 goto failed_alloc;
832 }
834 scsi_id->hi = hi;
836 list_add_tail(&scsi_id->scsi_list, &hi->scsi_ids);
838 /* Register the status FIFO address range. We could use the same FIFO
839 * for targets at different nodes. However we need different FIFOs per
840 * target in order to support multi-unit devices.
841 * The FIFO is located out of the local host controller's physical range
842 * but, if possible, within the posted write area. Status writes will
843 * then be performed as unified transactions. This slightly reduces
844 * bandwidth usage, and some Prolific based devices seem to require it.
845 */
846 scsi_id->status_fifo_addr = hpsb_allocate_and_register_addrspace(
847 &sbp2_highlevel, ud->ne->host, &sbp2_ops,
848 sizeof(struct sbp2_status_block), sizeof(quadlet_t),
849 ud->ne->host->low_addr_space, CSR1212_ALL_SPACE_END);
850 if (scsi_id->status_fifo_addr == CSR1212_INVALID_ADDR_SPACE) {
851 SBP2_ERR("failed to allocate status FIFO address range");
852 goto failed_alloc;
853 }
855 /* Register our host with the SCSI stack. */
856 scsi_host = scsi_host_alloc(&scsi_driver_template,
857 sizeof(unsigned long));
858 if (!scsi_host) {
859 SBP2_ERR("failed to register scsi host");
860 goto failed_alloc;
861 }
863 scsi_host->hostdata[0] = (unsigned long)scsi_id;
865 if (!scsi_add_host(scsi_host, &ud->device)) {
866 scsi_id->scsi_host = scsi_host;
867 return scsi_id;
868 }
870 SBP2_ERR("failed to add scsi host");
871 scsi_host_put(scsi_host);
873 failed_alloc:
874 sbp2_remove_device(scsi_id);
875 return NULL;
876 }
878 static void sbp2_host_reset(struct hpsb_host *host)
879 {
880 struct sbp2scsi_host_info *hi;
881 struct scsi_id_instance_data *scsi_id;
883 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
885 if (hi) {
886 list_for_each_entry(scsi_id, &hi->scsi_ids, scsi_list)
887 scsi_block_requests(scsi_id->scsi_host);
888 }
889 }
891 /*
892 * This function is where we first pull the node unique ids, and then
893 * allocate memory and register a SBP-2 device.
894 */
895 static int sbp2_start_device(struct scsi_id_instance_data *scsi_id)
896 {
897 struct sbp2scsi_host_info *hi = scsi_id->hi;
898 int error;
900 SBP2_DEBUG_ENTER();
902 /* Login FIFO DMA */
903 scsi_id->login_response =
904 pci_alloc_consistent(hi->host->pdev,
905 sizeof(struct sbp2_login_response),
906 &scsi_id->login_response_dma);
907 if (!scsi_id->login_response)
908 goto alloc_fail;
909 SBP2_DMA_ALLOC("consistent DMA region for login FIFO");
911 /* Query logins ORB DMA */
912 scsi_id->query_logins_orb =
913 pci_alloc_consistent(hi->host->pdev,
914 sizeof(struct sbp2_query_logins_orb),
915 &scsi_id->query_logins_orb_dma);
916 if (!scsi_id->query_logins_orb)
917 goto alloc_fail;
918 SBP2_DMA_ALLOC("consistent DMA region for query logins ORB");
920 /* Query logins response DMA */
921 scsi_id->query_logins_response =
922 pci_alloc_consistent(hi->host->pdev,
923 sizeof(struct sbp2_query_logins_response),
924 &scsi_id->query_logins_response_dma);
925 if (!scsi_id->query_logins_response)
926 goto alloc_fail;
927 SBP2_DMA_ALLOC("consistent DMA region for query logins response");
929 /* Reconnect ORB DMA */
930 scsi_id->reconnect_orb =
931 pci_alloc_consistent(hi->host->pdev,
932 sizeof(struct sbp2_reconnect_orb),
933 &scsi_id->reconnect_orb_dma);
934 if (!scsi_id->reconnect_orb)
935 goto alloc_fail;
936 SBP2_DMA_ALLOC("consistent DMA region for reconnect ORB");
938 /* Logout ORB DMA */
939 scsi_id->logout_orb =
940 pci_alloc_consistent(hi->host->pdev,
941 sizeof(struct sbp2_logout_orb),
942 &scsi_id->logout_orb_dma);
943 if (!scsi_id->logout_orb)
944 goto alloc_fail;
945 SBP2_DMA_ALLOC("consistent DMA region for logout ORB");
947 /* Login ORB DMA */
948 scsi_id->login_orb =
949 pci_alloc_consistent(hi->host->pdev,
950 sizeof(struct sbp2_login_orb),
951 &scsi_id->login_orb_dma);
952 if (!scsi_id->login_orb)
953 goto alloc_fail;
954 SBP2_DMA_ALLOC("consistent DMA region for login ORB");
956 SBP2_DEBUG("New SBP-2 device inserted, SCSI ID = %x", scsi_id->ud->id);
958 /*
959 * Create our command orb pool
960 */
961 if (sbp2util_create_command_orb_pool(scsi_id)) {
962 SBP2_ERR("sbp2util_create_command_orb_pool failed!");
963 sbp2_remove_device(scsi_id);
964 return -ENOMEM;
965 }
967 /* Schedule a timeout here. The reason is that we may be so close
968 * to a bus reset, that the device is not available for logins.
969 * This can happen when the bus reset is caused by the host
970 * connected to the sbp2 device being removed. That host would
971 * have a certain amount of time to relogin before the sbp2 device
972 * allows someone else to login instead. One second makes sense. */
973 msleep_interruptible(1000);
974 if (signal_pending(current)) {
975 sbp2_remove_device(scsi_id);
976 return -EINTR;
977 }
979 /*
980 * Login to the sbp-2 device
981 */
982 if (sbp2_login_device(scsi_id)) {
983 /* Login failed, just remove the device. */
984 sbp2_remove_device(scsi_id);
985 return -EBUSY;
986 }
988 /*
989 * Set max retries to something large on the device
990 */
991 sbp2_set_busy_timeout(scsi_id);
993 /*
994 * Do a SBP-2 fetch agent reset
995 */
996 sbp2_agent_reset(scsi_id, 1);
998 /*
999 * Get the max speed and packet size that we can use
1000 */
1001 sbp2_max_speed_and_size(scsi_id);
1003 /* Add this device to the scsi layer now */
1004 error = scsi_add_device(scsi_id->scsi_host, 0, scsi_id->ud->id, 0);
1005 if (error) {
1006 SBP2_ERR("scsi_add_device failed");
1007 sbp2_logout_device(scsi_id);
1008 sbp2_remove_device(scsi_id);
1009 return error;
1012 return 0;
1014 alloc_fail:
1015 SBP2_ERR("Could not allocate memory for scsi_id");
1016 sbp2_remove_device(scsi_id);
1017 return -ENOMEM;
1020 /*
1021 * This function removes an sbp2 device from the sbp2scsi_host_info struct.
1022 */
1023 static void sbp2_remove_device(struct scsi_id_instance_data *scsi_id)
1025 struct sbp2scsi_host_info *hi;
1027 SBP2_DEBUG_ENTER();
1029 if (!scsi_id)
1030 return;
1032 hi = scsi_id->hi;
1034 /* This will remove our scsi device aswell */
1035 if (scsi_id->scsi_host) {
1036 scsi_remove_host(scsi_id->scsi_host);
1037 scsi_host_put(scsi_id->scsi_host);
1040 sbp2util_remove_command_orb_pool(scsi_id);
1042 list_del(&scsi_id->scsi_list);
1044 if (scsi_id->login_response) {
1045 pci_free_consistent(hi->host->pdev,
1046 sizeof(struct sbp2_login_response),
1047 scsi_id->login_response,
1048 scsi_id->login_response_dma);
1049 SBP2_DMA_FREE("single login FIFO");
1052 if (scsi_id->login_orb) {
1053 pci_free_consistent(hi->host->pdev,
1054 sizeof(struct sbp2_login_orb),
1055 scsi_id->login_orb,
1056 scsi_id->login_orb_dma);
1057 SBP2_DMA_FREE("single login ORB");
1060 if (scsi_id->reconnect_orb) {
1061 pci_free_consistent(hi->host->pdev,
1062 sizeof(struct sbp2_reconnect_orb),
1063 scsi_id->reconnect_orb,
1064 scsi_id->reconnect_orb_dma);
1065 SBP2_DMA_FREE("single reconnect orb");
1068 if (scsi_id->logout_orb) {
1069 pci_free_consistent(hi->host->pdev,
1070 sizeof(struct sbp2_logout_orb),
1071 scsi_id->logout_orb,
1072 scsi_id->logout_orb_dma);
1073 SBP2_DMA_FREE("single logout orb");
1076 if (scsi_id->query_logins_orb) {
1077 pci_free_consistent(hi->host->pdev,
1078 sizeof(struct sbp2_query_logins_orb),
1079 scsi_id->query_logins_orb,
1080 scsi_id->query_logins_orb_dma);
1081 SBP2_DMA_FREE("single query logins orb");
1084 if (scsi_id->query_logins_response) {
1085 pci_free_consistent(hi->host->pdev,
1086 sizeof(struct sbp2_query_logins_response),
1087 scsi_id->query_logins_response,
1088 scsi_id->query_logins_response_dma);
1089 SBP2_DMA_FREE("single query logins data");
1092 if (scsi_id->status_fifo_addr != CSR1212_INVALID_ADDR_SPACE)
1093 hpsb_unregister_addrspace(&sbp2_highlevel, hi->host,
1094 scsi_id->status_fifo_addr);
1096 scsi_id->ud->device.driver_data = NULL;
1098 if (hi)
1099 module_put(hi->host->driver->owner);
1101 SBP2_DEBUG("SBP-2 device removed, SCSI ID = %d", scsi_id->ud->id);
1103 kfree(scsi_id);
1106 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
1107 /*
1108 * This function deals with physical dma write requests (for adapters that do not support
1109 * physical dma in hardware). Mostly just here for debugging...
1110 */
1111 static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid,
1112 int destid, quadlet_t *data, u64 addr,
1113 size_t length, u16 flags)
1116 /*
1117 * Manually put the data in the right place.
1118 */
1119 memcpy(bus_to_virt((u32) addr), data, length);
1120 sbp2util_packet_dump(data, length, "sbp2 phys dma write by device",
1121 (u32) addr);
1122 return RCODE_COMPLETE;
1125 /*
1126 * This function deals with physical dma read requests (for adapters that do not support
1127 * physical dma in hardware). Mostly just here for debugging...
1128 */
1129 static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid,
1130 quadlet_t *data, u64 addr, size_t length,
1131 u16 flags)
1134 /*
1135 * Grab data from memory and send a read response.
1136 */
1137 memcpy(data, bus_to_virt((u32) addr), length);
1138 sbp2util_packet_dump(data, length, "sbp2 phys dma read by device",
1139 (u32) addr);
1140 return RCODE_COMPLETE;
1142 #endif
1144 /**************************************
1145 * SBP-2 protocol related section
1146 **************************************/
1148 /*
1149 * This function queries the device for the maximum concurrent logins it
1150 * supports.
1151 */
1152 static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id)
1154 struct sbp2scsi_host_info *hi = scsi_id->hi;
1155 quadlet_t data[2];
1156 int max_logins;
1157 int active_logins;
1159 SBP2_DEBUG_ENTER();
1161 scsi_id->query_logins_orb->reserved1 = 0x0;
1162 scsi_id->query_logins_orb->reserved2 = 0x0;
1164 scsi_id->query_logins_orb->query_response_lo = scsi_id->query_logins_response_dma;
1165 scsi_id->query_logins_orb->query_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
1167 scsi_id->query_logins_orb->lun_misc = ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST);
1168 scsi_id->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1);
1169 scsi_id->query_logins_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_lun);
1171 scsi_id->query_logins_orb->reserved_resp_length =
1172 ORB_SET_QUERY_LOGINS_RESP_LENGTH(sizeof(struct sbp2_query_logins_response));
1174 scsi_id->query_logins_orb->status_fifo_hi =
1175 ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
1176 scsi_id->query_logins_orb->status_fifo_lo =
1177 ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr);
1179 sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb));
1181 sbp2util_packet_dump(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb),
1182 "sbp2 query logins orb", scsi_id->query_logins_orb_dma);
1184 memset(scsi_id->query_logins_response, 0, sizeof(struct sbp2_query_logins_response));
1185 memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
1187 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1188 data[1] = scsi_id->query_logins_orb_dma;
1189 sbp2util_cpu_to_be32_buffer(data, 8);
1191 atomic_set(&scsi_id->sbp2_login_complete, 0);
1193 hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8);
1195 if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 2*HZ)) {
1196 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1197 return -EIO;
1200 if (scsi_id->status_block.ORB_offset_lo != scsi_id->query_logins_orb_dma) {
1201 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1202 return -EIO;
1205 if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
1206 STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
1207 STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
1209 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1210 return -EIO;
1213 sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_response, sizeof(struct sbp2_query_logins_response));
1215 SBP2_DEBUG("length_max_logins = %x",
1216 (unsigned int)scsi_id->query_logins_response->length_max_logins);
1218 max_logins = RESPONSE_GET_MAX_LOGINS(scsi_id->query_logins_response->length_max_logins);
1219 SBP2_INFO("Maximum concurrent logins supported: %d", max_logins);
1221 active_logins = RESPONSE_GET_ACTIVE_LOGINS(scsi_id->query_logins_response->length_max_logins);
1222 SBP2_INFO("Number of active logins: %d", active_logins);
1224 if (active_logins >= max_logins) {
1225 return -EIO;
1228 return 0;
1231 /*
1232 * This function is called in order to login to a particular SBP-2 device,
1233 * after a bus reset.
1234 */
1235 static int sbp2_login_device(struct scsi_id_instance_data *scsi_id)
1237 struct sbp2scsi_host_info *hi = scsi_id->hi;
1238 quadlet_t data[2];
1240 SBP2_DEBUG_ENTER();
1242 if (!scsi_id->login_orb) {
1243 SBP2_DEBUG("%s: login_orb not alloc'd!", __FUNCTION__);
1244 return -EIO;
1247 if (!exclusive_login) {
1248 if (sbp2_query_logins(scsi_id)) {
1249 SBP2_INFO("Device does not support any more concurrent logins");
1250 return -EIO;
1254 /* Set-up login ORB, assume no password */
1255 scsi_id->login_orb->password_hi = 0;
1256 scsi_id->login_orb->password_lo = 0;
1258 scsi_id->login_orb->login_response_lo = scsi_id->login_response_dma;
1259 scsi_id->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
1261 scsi_id->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST);
1262 scsi_id->login_orb->lun_misc |= ORB_SET_RECONNECT(0); /* One second reconnect time */
1263 scsi_id->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(exclusive_login); /* Exclusive access to device */
1264 scsi_id->login_orb->lun_misc |= ORB_SET_NOTIFY(1); /* Notify us of login complete */
1265 scsi_id->login_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_lun);
1267 scsi_id->login_orb->passwd_resp_lengths =
1268 ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response));
1270 scsi_id->login_orb->status_fifo_hi =
1271 ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
1272 scsi_id->login_orb->status_fifo_lo =
1273 ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr);
1275 sbp2util_cpu_to_be32_buffer(scsi_id->login_orb, sizeof(struct sbp2_login_orb));
1277 sbp2util_packet_dump(scsi_id->login_orb, sizeof(struct sbp2_login_orb),
1278 "sbp2 login orb", scsi_id->login_orb_dma);
1280 memset(scsi_id->login_response, 0, sizeof(struct sbp2_login_response));
1281 memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
1283 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1284 data[1] = scsi_id->login_orb_dma;
1285 sbp2util_cpu_to_be32_buffer(data, 8);
1287 atomic_set(&scsi_id->sbp2_login_complete, 0);
1289 hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8);
1291 /*
1292 * Wait for login status (up to 20 seconds)...
1293 */
1294 if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 20*HZ)) {
1295 SBP2_ERR("Error logging into SBP-2 device - login timed-out");
1296 return -EIO;
1299 /*
1300 * Sanity. Make sure status returned matches login orb.
1301 */
1302 if (scsi_id->status_block.ORB_offset_lo != scsi_id->login_orb_dma) {
1303 SBP2_ERR("Error logging into SBP-2 device - login timed-out");
1304 return -EIO;
1307 /*
1308 * Check status
1309 */
1310 if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
1311 STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
1312 STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
1314 SBP2_ERR("Error logging into SBP-2 device - login failed");
1315 return -EIO;
1318 /*
1319 * Byte swap the login response, for use when reconnecting or
1320 * logging out.
1321 */
1322 sbp2util_cpu_to_be32_buffer(scsi_id->login_response, sizeof(struct sbp2_login_response));
1324 /*
1325 * Grab our command block agent address from the login response.
1326 */
1327 SBP2_DEBUG("command_block_agent_hi = %x",
1328 (unsigned int)scsi_id->login_response->command_block_agent_hi);
1329 SBP2_DEBUG("command_block_agent_lo = %x",
1330 (unsigned int)scsi_id->login_response->command_block_agent_lo);
1332 scsi_id->sbp2_command_block_agent_addr =
1333 ((u64)scsi_id->login_response->command_block_agent_hi) << 32;
1334 scsi_id->sbp2_command_block_agent_addr |= ((u64)scsi_id->login_response->command_block_agent_lo);
1335 scsi_id->sbp2_command_block_agent_addr &= 0x0000ffffffffffffULL;
1337 SBP2_INFO("Logged into SBP-2 device");
1339 return 0;
1343 /*
1344 * This function is called in order to logout from a particular SBP-2
1345 * device, usually called during driver unload.
1346 */
1347 static int sbp2_logout_device(struct scsi_id_instance_data *scsi_id)
1349 struct sbp2scsi_host_info *hi = scsi_id->hi;
1350 quadlet_t data[2];
1351 int error;
1353 SBP2_DEBUG_ENTER();
1355 /*
1356 * Set-up logout ORB
1357 */
1358 scsi_id->logout_orb->reserved1 = 0x0;
1359 scsi_id->logout_orb->reserved2 = 0x0;
1360 scsi_id->logout_orb->reserved3 = 0x0;
1361 scsi_id->logout_orb->reserved4 = 0x0;
1363 scsi_id->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST);
1364 scsi_id->logout_orb->login_ID_misc |= ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID);
1366 /* Notify us when complete */
1367 scsi_id->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1369 scsi_id->logout_orb->reserved5 = 0x0;
1370 scsi_id->logout_orb->status_fifo_hi =
1371 ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
1372 scsi_id->logout_orb->status_fifo_lo =
1373 ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr);
1375 /*
1376 * Byte swap ORB if necessary
1377 */
1378 sbp2util_cpu_to_be32_buffer(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb));
1380 sbp2util_packet_dump(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb),
1381 "sbp2 logout orb", scsi_id->logout_orb_dma);
1383 /*
1384 * Ok, let's write to the target's management agent register
1385 */
1386 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1387 data[1] = scsi_id->logout_orb_dma;
1388 sbp2util_cpu_to_be32_buffer(data, 8);
1390 atomic_set(&scsi_id->sbp2_login_complete, 0);
1392 error = hpsb_node_write(scsi_id->ne,
1393 scsi_id->sbp2_management_agent_addr, data, 8);
1394 if (error)
1395 return error;
1397 /* Wait for device to logout...1 second. */
1398 if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ))
1399 return -EIO;
1401 SBP2_INFO("Logged out of SBP-2 device");
1403 return 0;
1407 /*
1408 * This function is called in order to reconnect to a particular SBP-2
1409 * device, after a bus reset.
1410 */
1411 static int sbp2_reconnect_device(struct scsi_id_instance_data *scsi_id)
1413 struct sbp2scsi_host_info *hi = scsi_id->hi;
1414 quadlet_t data[2];
1415 int error;
1417 SBP2_DEBUG_ENTER();
1419 /*
1420 * Set-up reconnect ORB
1421 */
1422 scsi_id->reconnect_orb->reserved1 = 0x0;
1423 scsi_id->reconnect_orb->reserved2 = 0x0;
1424 scsi_id->reconnect_orb->reserved3 = 0x0;
1425 scsi_id->reconnect_orb->reserved4 = 0x0;
1427 scsi_id->reconnect_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST);
1428 scsi_id->reconnect_orb->login_ID_misc |=
1429 ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID);
1431 /* Notify us when complete */
1432 scsi_id->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1434 scsi_id->reconnect_orb->reserved5 = 0x0;
1435 scsi_id->reconnect_orb->status_fifo_hi =
1436 ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
1437 scsi_id->reconnect_orb->status_fifo_lo =
1438 ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr);
1440 /*
1441 * Byte swap ORB if necessary
1442 */
1443 sbp2util_cpu_to_be32_buffer(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb));
1445 sbp2util_packet_dump(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb),
1446 "sbp2 reconnect orb", scsi_id->reconnect_orb_dma);
1448 /*
1449 * Initialize status fifo
1450 */
1451 memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
1453 /*
1454 * Ok, let's write to the target's management agent register
1455 */
1456 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1457 data[1] = scsi_id->reconnect_orb_dma;
1458 sbp2util_cpu_to_be32_buffer(data, 8);
1460 atomic_set(&scsi_id->sbp2_login_complete, 0);
1462 error = hpsb_node_write(scsi_id->ne,
1463 scsi_id->sbp2_management_agent_addr, data, 8);
1464 if (error)
1465 return error;
1467 /*
1468 * Wait for reconnect status (up to 1 second)...
1469 */
1470 if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ)) {
1471 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out");
1472 return -EIO;
1475 /*
1476 * Sanity. Make sure status returned matches reconnect orb.
1477 */
1478 if (scsi_id->status_block.ORB_offset_lo != scsi_id->reconnect_orb_dma) {
1479 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out");
1480 return -EIO;
1483 /*
1484 * Check status
1485 */
1486 if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
1487 STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
1488 STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
1490 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect failed");
1491 return -EIO;
1494 HPSB_DEBUG("Reconnected to SBP-2 device");
1496 return 0;
1500 /*
1501 * This function is called in order to set the busy timeout (number of
1502 * retries to attempt) on the sbp2 device.
1503 */
1504 static int sbp2_set_busy_timeout(struct scsi_id_instance_data *scsi_id)
1506 quadlet_t data;
1508 SBP2_DEBUG_ENTER();
1510 data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE);
1511 if (hpsb_node_write(scsi_id->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4))
1512 SBP2_ERR("%s error", __FUNCTION__);
1513 return 0;
1516 /*
1517 * This function is called to parse sbp2 device's config rom unit
1518 * directory. Used to determine things like sbp2 management agent offset,
1519 * and command set used (SCSI or RBC).
1520 */
1521 static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id,
1522 struct unit_directory *ud)
1524 struct csr1212_keyval *kv;
1525 struct csr1212_dentry *dentry;
1526 u64 management_agent_addr;
1527 u32 command_set_spec_id, command_set, unit_characteristics,
1528 firmware_revision;
1529 unsigned workarounds;
1530 int i;
1532 SBP2_DEBUG_ENTER();
1534 management_agent_addr = 0x0;
1535 command_set_spec_id = 0x0;
1536 command_set = 0x0;
1537 unit_characteristics = 0x0;
1538 firmware_revision = 0x0;
1540 /* Handle different fields in the unit directory, based on keys */
1541 csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) {
1542 switch (kv->key.id) {
1543 case CSR1212_KV_ID_DEPENDENT_INFO:
1544 if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET) {
1545 /* Save off the management agent address */
1546 management_agent_addr =
1547 CSR1212_REGISTER_SPACE_BASE +
1548 (kv->value.csr_offset << 2);
1550 SBP2_DEBUG("sbp2_management_agent_addr = %x",
1551 (unsigned int)management_agent_addr);
1552 } else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
1553 scsi_id->sbp2_lun =
1554 ORB_SET_LUN(kv->value.immediate);
1556 break;
1558 case SBP2_COMMAND_SET_SPEC_ID_KEY:
1559 /* Command spec organization */
1560 command_set_spec_id = kv->value.immediate;
1561 SBP2_DEBUG("sbp2_command_set_spec_id = %x",
1562 (unsigned int)command_set_spec_id);
1563 break;
1565 case SBP2_COMMAND_SET_KEY:
1566 /* Command set used by sbp2 device */
1567 command_set = kv->value.immediate;
1568 SBP2_DEBUG("sbp2_command_set = %x",
1569 (unsigned int)command_set);
1570 break;
1572 case SBP2_UNIT_CHARACTERISTICS_KEY:
1573 /*
1574 * Unit characterisitcs (orb related stuff
1575 * that I'm not yet paying attention to)
1576 */
1577 unit_characteristics = kv->value.immediate;
1578 SBP2_DEBUG("sbp2_unit_characteristics = %x",
1579 (unsigned int)unit_characteristics);
1580 break;
1582 case SBP2_FIRMWARE_REVISION_KEY:
1583 /* Firmware revision */
1584 firmware_revision = kv->value.immediate;
1585 SBP2_DEBUG("sbp2_firmware_revision = %x",
1586 (unsigned int)firmware_revision);
1587 break;
1589 default:
1590 break;
1594 workarounds = sbp2_default_workarounds;
1595 if (force_inquiry_hack) {
1596 SBP2_WARN("force_inquiry_hack is deprecated. "
1597 "Use parameter 'workarounds' instead.");
1598 workarounds |= SBP2_WORKAROUND_INQUIRY_36;
1601 if (!(workarounds & SBP2_WORKAROUND_OVERRIDE))
1602 for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) {
1603 if (sbp2_workarounds_table[i].firmware_revision &&
1604 sbp2_workarounds_table[i].firmware_revision !=
1605 (firmware_revision & 0xffff00))
1606 continue;
1607 if (sbp2_workarounds_table[i].model_id &&
1608 sbp2_workarounds_table[i].model_id != ud->model_id)
1609 continue;
1610 workarounds |= sbp2_workarounds_table[i].workarounds;
1611 break;
1614 if (workarounds)
1615 SBP2_INFO("Workarounds for node " NODE_BUS_FMT ": 0x%x "
1616 "(firmware_revision 0x%06x, vendor_id 0x%06x,"
1617 " model_id 0x%06x)",
1618 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid),
1619 workarounds, firmware_revision,
1620 ud->vendor_id ? ud->vendor_id : ud->ne->vendor_id,
1621 ud->model_id);
1623 /* We would need one SCSI host template for each target to adjust
1624 * max_sectors on the fly, therefore warn only. */
1625 if (workarounds & SBP2_WORKAROUND_128K_MAX_TRANS &&
1626 (max_sectors * 512) > (128 * 1024))
1627 SBP2_WARN("Node " NODE_BUS_FMT ": Bridge only supports 128KB "
1628 "max transfer size. WARNING: Current max_sectors "
1629 "setting is larger than 128KB (%d sectors)",
1630 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid),
1631 max_sectors);
1633 /* If this is a logical unit directory entry, process the parent
1634 * to get the values. */
1635 if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) {
1636 struct unit_directory *parent_ud =
1637 container_of(ud->device.parent, struct unit_directory, device);
1638 sbp2_parse_unit_directory(scsi_id, parent_ud);
1639 } else {
1640 scsi_id->sbp2_management_agent_addr = management_agent_addr;
1641 scsi_id->sbp2_command_set_spec_id = command_set_spec_id;
1642 scsi_id->sbp2_command_set = command_set;
1643 scsi_id->sbp2_unit_characteristics = unit_characteristics;
1644 scsi_id->sbp2_firmware_revision = firmware_revision;
1645 scsi_id->workarounds = workarounds;
1646 if (ud->flags & UNIT_DIRECTORY_HAS_LUN)
1647 scsi_id->sbp2_lun = ORB_SET_LUN(ud->lun);
1651 #define SBP2_PAYLOAD_TO_BYTES(p) (1 << ((p) + 2))
1653 /*
1654 * This function is called in order to determine the max speed and packet
1655 * size we can use in our ORBs. Note, that we (the driver and host) only
1656 * initiate the transaction. The SBP-2 device actually transfers the data
1657 * (by reading from the DMA area we tell it). This means that the SBP-2
1658 * device decides the actual maximum data it can transfer. We just tell it
1659 * the speed that it needs to use, and the max_rec the host supports, and
1660 * it takes care of the rest.
1661 */
1662 static int sbp2_max_speed_and_size(struct scsi_id_instance_data *scsi_id)
1664 struct sbp2scsi_host_info *hi = scsi_id->hi;
1665 u8 payload;
1667 SBP2_DEBUG_ENTER();
1669 scsi_id->speed_code =
1670 hi->host->speed[NODEID_TO_NODE(scsi_id->ne->nodeid)];
1672 /* Bump down our speed if the user requested it */
1673 if (scsi_id->speed_code > max_speed) {
1674 scsi_id->speed_code = max_speed;
1675 SBP2_ERR("Forcing SBP-2 max speed down to %s",
1676 hpsb_speedto_str[scsi_id->speed_code]);
1679 /* Payload size is the lesser of what our speed supports and what
1680 * our host supports. */
1681 payload = min(sbp2_speedto_max_payload[scsi_id->speed_code],
1682 (u8) (hi->host->csr.max_rec - 1));
1684 /* If physical DMA is off, work around limitation in ohci1394:
1685 * packet size must not exceed PAGE_SIZE */
1686 if (scsi_id->ne->host->low_addr_space < (1ULL << 32))
1687 while (SBP2_PAYLOAD_TO_BYTES(payload) + 24 > PAGE_SIZE &&
1688 payload)
1689 payload--;
1691 HPSB_DEBUG("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]",
1692 NODE_BUS_ARGS(hi->host, scsi_id->ne->nodeid),
1693 hpsb_speedto_str[scsi_id->speed_code],
1694 SBP2_PAYLOAD_TO_BYTES(payload));
1696 scsi_id->max_payload_size = payload;
1697 return 0;
1700 /*
1701 * This function is called in order to perform a SBP-2 agent reset.
1702 */
1703 static int sbp2_agent_reset(struct scsi_id_instance_data *scsi_id, int wait)
1705 quadlet_t data;
1706 u64 addr;
1707 int retval;
1709 SBP2_DEBUG_ENTER();
1711 data = ntohl(SBP2_AGENT_RESET_DATA);
1712 addr = scsi_id->sbp2_command_block_agent_addr + SBP2_AGENT_RESET_OFFSET;
1714 if (wait)
1715 retval = hpsb_node_write(scsi_id->ne, addr, &data, 4);
1716 else
1717 retval = sbp2util_node_write_no_wait(scsi_id->ne, addr, &data, 4);
1719 if (retval < 0) {
1720 SBP2_ERR("hpsb_node_write failed.\n");
1721 return -EIO;
1724 /*
1725 * Need to make sure orb pointer is written on next command
1726 */
1727 scsi_id->last_orb = NULL;
1729 return 0;
1732 static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb,
1733 struct sbp2scsi_host_info *hi,
1734 struct sbp2_command_info *command,
1735 unsigned int scsi_use_sg,
1736 struct scatterlist *sgpnt,
1737 u32 orb_direction,
1738 enum dma_data_direction dma_dir)
1740 command->dma_dir = dma_dir;
1741 orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1742 orb->misc |= ORB_SET_DIRECTION(orb_direction);
1744 /* Special case if only one element (and less than 64KB in size) */
1745 if ((scsi_use_sg == 1) &&
1746 (sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) {
1748 SBP2_DEBUG("Only one s/g element");
1749 command->dma_size = sgpnt[0].length;
1750 command->dma_type = CMD_DMA_PAGE;
1751 command->cmd_dma = pci_map_page(hi->host->pdev,
1752 sgpnt[0].page,
1753 sgpnt[0].offset,
1754 command->dma_size,
1755 command->dma_dir);
1756 SBP2_DMA_ALLOC("single page scatter element");
1758 orb->data_descriptor_lo = command->cmd_dma;
1759 orb->misc |= ORB_SET_DATA_SIZE(command->dma_size);
1761 } else {
1762 struct sbp2_unrestricted_page_table *sg_element =
1763 &command->scatter_gather_element[0];
1764 u32 sg_count, sg_len;
1765 dma_addr_t sg_addr;
1766 int i, count = pci_map_sg(hi->host->pdev, sgpnt, scsi_use_sg,
1767 dma_dir);
1769 SBP2_DMA_ALLOC("scatter list");
1771 command->dma_size = scsi_use_sg;
1772 command->sge_buffer = sgpnt;
1774 /* use page tables (s/g) */
1775 orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1776 orb->data_descriptor_lo = command->sge_dma;
1778 /*
1779 * Loop through and fill out our sbp-2 page tables
1780 * (and split up anything too large)
1781 */
1782 for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) {
1783 sg_len = sg_dma_len(sgpnt);
1784 sg_addr = sg_dma_address(sgpnt);
1785 while (sg_len) {
1786 sg_element[sg_count].segment_base_lo = sg_addr;
1787 if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
1788 sg_element[sg_count].length_segment_base_hi =
1789 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
1790 sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
1791 sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
1792 } else {
1793 sg_element[sg_count].length_segment_base_hi =
1794 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
1795 sg_len = 0;
1797 sg_count++;
1801 /* Number of page table (s/g) elements */
1802 orb->misc |= ORB_SET_DATA_SIZE(sg_count);
1804 sbp2util_packet_dump(sg_element,
1805 (sizeof(struct sbp2_unrestricted_page_table)) * sg_count,
1806 "sbp2 s/g list", command->sge_dma);
1808 /* Byte swap page tables if necessary */
1809 sbp2util_cpu_to_be32_buffer(sg_element,
1810 (sizeof(struct sbp2_unrestricted_page_table)) *
1811 sg_count);
1815 static void sbp2_prep_command_orb_no_sg(struct sbp2_command_orb *orb,
1816 struct sbp2scsi_host_info *hi,
1817 struct sbp2_command_info *command,
1818 struct scatterlist *sgpnt,
1819 u32 orb_direction,
1820 unsigned int scsi_request_bufflen,
1821 void *scsi_request_buffer,
1822 enum dma_data_direction dma_dir)
1824 command->dma_dir = dma_dir;
1825 command->dma_size = scsi_request_bufflen;
1826 command->dma_type = CMD_DMA_SINGLE;
1827 command->cmd_dma = pci_map_single(hi->host->pdev, scsi_request_buffer,
1828 command->dma_size, command->dma_dir);
1829 orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1830 orb->misc |= ORB_SET_DIRECTION(orb_direction);
1832 SBP2_DMA_ALLOC("single bulk");
1834 /*
1835 * Handle case where we get a command w/o s/g enabled (but
1836 * check for transfers larger than 64K)
1837 */
1838 if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) {
1840 orb->data_descriptor_lo = command->cmd_dma;
1841 orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen);
1843 } else {
1844 struct sbp2_unrestricted_page_table *sg_element =
1845 &command->scatter_gather_element[0];
1846 u32 sg_count, sg_len;
1847 dma_addr_t sg_addr;
1849 /*
1850 * Need to turn this into page tables, since the
1851 * buffer is too large.
1852 */
1853 orb->data_descriptor_lo = command->sge_dma;
1855 /* Use page tables (s/g) */
1856 orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1858 /*
1859 * fill out our sbp-2 page tables (and split up
1860 * the large buffer)
1861 */
1862 sg_count = 0;
1863 sg_len = scsi_request_bufflen;
1864 sg_addr = command->cmd_dma;
1865 while (sg_len) {
1866 sg_element[sg_count].segment_base_lo = sg_addr;
1867 if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
1868 sg_element[sg_count].length_segment_base_hi =
1869 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
1870 sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
1871 sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
1872 } else {
1873 sg_element[sg_count].length_segment_base_hi =
1874 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
1875 sg_len = 0;
1877 sg_count++;
1880 /* Number of page table (s/g) elements */
1881 orb->misc |= ORB_SET_DATA_SIZE(sg_count);
1883 sbp2util_packet_dump(sg_element,
1884 (sizeof(struct sbp2_unrestricted_page_table)) * sg_count,
1885 "sbp2 s/g list", command->sge_dma);
1887 /* Byte swap page tables if necessary */
1888 sbp2util_cpu_to_be32_buffer(sg_element,
1889 (sizeof(struct sbp2_unrestricted_page_table)) *
1890 sg_count);
1894 /*
1895 * This function is called to create the actual command orb and s/g list
1896 * out of the scsi command itself.
1897 */
1898 static void sbp2_create_command_orb(struct scsi_id_instance_data *scsi_id,
1899 struct sbp2_command_info *command,
1900 unchar *scsi_cmd,
1901 unsigned int scsi_use_sg,
1902 unsigned int scsi_request_bufflen,
1903 void *scsi_request_buffer,
1904 enum dma_data_direction dma_dir)
1906 struct sbp2scsi_host_info *hi = scsi_id->hi;
1907 struct scatterlist *sgpnt = (struct scatterlist *)scsi_request_buffer;
1908 struct sbp2_command_orb *command_orb = &command->command_orb;
1909 u32 orb_direction;
1911 /*
1912 * Set-up our command ORB..
1914 * NOTE: We're doing unrestricted page tables (s/g), as this is
1915 * best performance (at least with the devices I have). This means
1916 * that data_size becomes the number of s/g elements, and
1917 * page_size should be zero (for unrestricted).
1918 */
1919 command_orb->next_ORB_hi = ORB_SET_NULL_PTR(1);
1920 command_orb->next_ORB_lo = 0x0;
1921 command_orb->misc = ORB_SET_MAX_PAYLOAD(scsi_id->max_payload_size);
1922 command_orb->misc |= ORB_SET_SPEED(scsi_id->speed_code);
1923 command_orb->misc |= ORB_SET_NOTIFY(1); /* Notify us when complete */
1925 if (dma_dir == DMA_NONE)
1926 orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
1927 else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen)
1928 orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA;
1929 else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen)
1930 orb_direction = ORB_DIRECTION_READ_FROM_MEDIA;
1931 else {
1932 SBP2_WARN("Falling back to DMA_NONE");
1933 orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
1936 /* Set-up our pagetable stuff */
1937 if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) {
1938 SBP2_DEBUG("No data transfer");
1939 command_orb->data_descriptor_hi = 0x0;
1940 command_orb->data_descriptor_lo = 0x0;
1941 command_orb->misc |= ORB_SET_DIRECTION(1);
1942 } else if (scsi_use_sg) {
1943 SBP2_DEBUG("Use scatter/gather");
1944 sbp2_prep_command_orb_sg(command_orb, hi, command, scsi_use_sg,
1945 sgpnt, orb_direction, dma_dir);
1946 } else {
1947 SBP2_DEBUG("No scatter/gather");
1948 sbp2_prep_command_orb_no_sg(command_orb, hi, command, sgpnt,
1949 orb_direction, scsi_request_bufflen,
1950 scsi_request_buffer, dma_dir);
1953 /* Byte swap command ORB if necessary */
1954 sbp2util_cpu_to_be32_buffer(command_orb, sizeof(struct sbp2_command_orb));
1956 /* Put our scsi command in the command ORB */
1957 memset(command_orb->cdb, 0, 12);
1958 memcpy(command_orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd));
1961 /*
1962 * This function is called in order to begin a regular SBP-2 command.
1963 */
1964 static int sbp2_link_orb_command(struct scsi_id_instance_data *scsi_id,
1965 struct sbp2_command_info *command)
1967 struct sbp2scsi_host_info *hi = scsi_id->hi;
1968 struct sbp2_command_orb *command_orb = &command->command_orb;
1969 struct node_entry *ne = scsi_id->ne;
1970 u64 addr;
1972 outstanding_orb_incr;
1973 SBP2_ORB_DEBUG("sending command orb %p, total orbs = %x",
1974 command_orb, global_outstanding_command_orbs);
1976 pci_dma_sync_single_for_device(hi->host->pdev, command->command_orb_dma,
1977 sizeof(struct sbp2_command_orb),
1978 PCI_DMA_BIDIRECTIONAL);
1979 pci_dma_sync_single_for_device(hi->host->pdev, command->sge_dma,
1980 sizeof(command->scatter_gather_element),
1981 PCI_DMA_BIDIRECTIONAL);
1982 /*
1983 * Check to see if there are any previous orbs to use
1984 */
1985 if (scsi_id->last_orb == NULL) {
1986 quadlet_t data[2];
1988 /*
1989 * Ok, let's write to the target's management agent register
1990 */
1991 addr = scsi_id->sbp2_command_block_agent_addr + SBP2_ORB_POINTER_OFFSET;
1992 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1993 data[1] = command->command_orb_dma;
1994 sbp2util_cpu_to_be32_buffer(data, 8);
1996 SBP2_ORB_DEBUG("write command agent, command orb %p", command_orb);
1998 if (sbp2util_node_write_no_wait(ne, addr, data, 8) < 0) {
1999 SBP2_ERR("sbp2util_node_write_no_wait failed.\n");
2000 return -EIO;
2003 SBP2_ORB_DEBUG("write command agent complete");
2005 scsi_id->last_orb = command_orb;
2006 scsi_id->last_orb_dma = command->command_orb_dma;
2008 } else {
2009 quadlet_t data;
2011 /*
2012 * We have an orb already sent (maybe or maybe not
2013 * processed) that we can append this orb to. So do so,
2014 * and ring the doorbell. Have to be very careful
2015 * modifying these next orb pointers, as they are accessed
2016 * both by the sbp2 device and us.
2017 */
2018 scsi_id->last_orb->next_ORB_lo =
2019 cpu_to_be32(command->command_orb_dma);
2020 /* Tells hardware that this pointer is valid */
2021 scsi_id->last_orb->next_ORB_hi = 0x0;
2022 pci_dma_sync_single_for_device(hi->host->pdev,
2023 scsi_id->last_orb_dma,
2024 sizeof(struct sbp2_command_orb),
2025 PCI_DMA_BIDIRECTIONAL);
2027 /*
2028 * Ring the doorbell
2029 */
2030 data = cpu_to_be32(command->command_orb_dma);
2031 addr = scsi_id->sbp2_command_block_agent_addr + SBP2_DOORBELL_OFFSET;
2033 SBP2_ORB_DEBUG("ring doorbell, command orb %p", command_orb);
2035 if (sbp2util_node_write_no_wait(ne, addr, &data, 4) < 0) {
2036 SBP2_ERR("sbp2util_node_write_no_wait failed");
2037 return -EIO;
2040 scsi_id->last_orb = command_orb;
2041 scsi_id->last_orb_dma = command->command_orb_dma;
2044 return 0;
2047 /*
2048 * This function is called in order to begin a regular SBP-2 command.
2049 */
2050 static int sbp2_send_command(struct scsi_id_instance_data *scsi_id,
2051 struct scsi_cmnd *SCpnt,
2052 void (*done)(struct scsi_cmnd *))
2054 unchar *cmd = (unchar *) SCpnt->cmnd;
2055 unsigned int request_bufflen = SCpnt->request_bufflen;
2056 struct sbp2_command_info *command;
2058 SBP2_DEBUG_ENTER();
2059 SBP2_DEBUG("SCSI transfer size = %x", request_bufflen);
2060 SBP2_DEBUG("SCSI s/g elements = %x", (unsigned int)SCpnt->use_sg);
2062 /*
2063 * Allocate a command orb and s/g structure
2064 */
2065 command = sbp2util_allocate_command_orb(scsi_id, SCpnt, done);
2066 if (!command) {
2067 return -EIO;
2070 /*
2071 * Now actually fill in the comamnd orb and sbp2 s/g list
2072 */
2073 sbp2_create_command_orb(scsi_id, command, cmd, SCpnt->use_sg,
2074 request_bufflen, SCpnt->request_buffer,
2075 SCpnt->sc_data_direction);
2077 sbp2util_packet_dump(&command->command_orb, sizeof(struct sbp2_command_orb),
2078 "sbp2 command orb", command->command_orb_dma);
2080 /*
2081 * Initialize status fifo
2082 */
2083 memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
2085 /*
2086 * Link up the orb, and ring the doorbell if needed
2087 */
2088 sbp2_link_orb_command(scsi_id, command);
2090 return 0;
2093 /*
2094 * Translates SBP-2 status into SCSI sense data for check conditions
2095 */
2096 static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, unchar *sense_data)
2098 SBP2_DEBUG_ENTER();
2100 /*
2101 * Ok, it's pretty ugly... ;-)
2102 */
2103 sense_data[0] = 0x70;
2104 sense_data[1] = 0x0;
2105 sense_data[2] = sbp2_status[9];
2106 sense_data[3] = sbp2_status[12];
2107 sense_data[4] = sbp2_status[13];
2108 sense_data[5] = sbp2_status[14];
2109 sense_data[6] = sbp2_status[15];
2110 sense_data[7] = 10;
2111 sense_data[8] = sbp2_status[16];
2112 sense_data[9] = sbp2_status[17];
2113 sense_data[10] = sbp2_status[18];
2114 sense_data[11] = sbp2_status[19];
2115 sense_data[12] = sbp2_status[10];
2116 sense_data[13] = sbp2_status[11];
2117 sense_data[14] = sbp2_status[20];
2118 sense_data[15] = sbp2_status[21];
2120 return sbp2_status[8] & 0x3f; /* return scsi status */
2123 /*
2124 * This function deals with status writes from the SBP-2 device
2125 */
2126 static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, int destid,
2127 quadlet_t *data, u64 addr, size_t length, u16 fl)
2129 struct sbp2scsi_host_info *hi;
2130 struct scsi_id_instance_data *scsi_id = NULL, *scsi_id_tmp;
2131 struct scsi_cmnd *SCpnt = NULL;
2132 u32 scsi_status = SBP2_SCSI_STATUS_GOOD;
2133 struct sbp2_command_info *command;
2134 unsigned long flags;
2136 SBP2_DEBUG_ENTER();
2138 sbp2util_packet_dump(data, length, "sbp2 status write by device", (u32)addr);
2140 if (!host) {
2141 SBP2_ERR("host is NULL - this is bad!");
2142 return RCODE_ADDRESS_ERROR;
2145 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
2147 if (!hi) {
2148 SBP2_ERR("host info is NULL - this is bad!");
2149 return RCODE_ADDRESS_ERROR;
2152 /*
2153 * Find our scsi_id structure by looking at the status fifo address
2154 * written to by the sbp2 device.
2155 */
2156 list_for_each_entry(scsi_id_tmp, &hi->scsi_ids, scsi_list) {
2157 if (scsi_id_tmp->ne->nodeid == nodeid &&
2158 scsi_id_tmp->status_fifo_addr == addr) {
2159 scsi_id = scsi_id_tmp;
2160 break;
2164 if (!scsi_id) {
2165 SBP2_ERR("scsi_id is NULL - device is gone?");
2166 return RCODE_ADDRESS_ERROR;
2169 /*
2170 * Put response into scsi_id status fifo...
2171 */
2172 memcpy(&scsi_id->status_block, data, length);
2174 /*
2175 * Byte swap first two quadlets (8 bytes) of status for processing
2176 */
2177 sbp2util_be32_to_cpu_buffer(&scsi_id->status_block, 8);
2179 /*
2180 * Handle command ORB status here if necessary. First, need to match status with command.
2181 */
2182 command = sbp2util_find_command_for_orb(scsi_id, scsi_id->status_block.ORB_offset_lo);
2183 if (command) {
2185 SBP2_DEBUG("Found status for command ORB");
2186 pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma,
2187 sizeof(struct sbp2_command_orb),
2188 PCI_DMA_BIDIRECTIONAL);
2189 pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma,
2190 sizeof(command->scatter_gather_element),
2191 PCI_DMA_BIDIRECTIONAL);
2193 SBP2_ORB_DEBUG("matched command orb %p", &command->command_orb);
2194 outstanding_orb_decr;
2196 /*
2197 * Matched status with command, now grab scsi command pointers and check status
2198 */
2199 SCpnt = command->Current_SCpnt;
2200 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
2201 sbp2util_mark_command_completed(scsi_id, command);
2202 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
2204 if (SCpnt) {
2206 /*
2207 * See if the target stored any scsi status information
2208 */
2209 if (STATUS_GET_LENGTH(scsi_id->status_block.ORB_offset_hi_misc) > 1) {
2210 /*
2211 * Translate SBP-2 status to SCSI sense data
2212 */
2213 SBP2_DEBUG("CHECK CONDITION");
2214 scsi_status = sbp2_status_to_sense_data((unchar *)&scsi_id->status_block, SCpnt->sense_buffer);
2217 /*
2218 * Check to see if the dead bit is set. If so, we'll have to initiate
2219 * a fetch agent reset.
2220 */
2221 if (STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc)) {
2223 /*
2224 * Initiate a fetch agent reset.
2225 */
2226 SBP2_DEBUG("Dead bit set - initiating fetch agent reset");
2227 sbp2_agent_reset(scsi_id, 0);
2230 SBP2_ORB_DEBUG("completing command orb %p", &command->command_orb);
2233 /*
2234 * Check here to see if there are no commands in-use. If there are none, we can
2235 * null out last orb so that next time around we write directly to the orb pointer...
2236 * Quick start saves one 1394 bus transaction.
2237 */
2238 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
2239 if (list_empty(&scsi_id->sbp2_command_orb_inuse)) {
2240 scsi_id->last_orb = NULL;
2242 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
2244 } else {
2246 /*
2247 * It's probably a login/logout/reconnect status.
2248 */
2249 if ((scsi_id->login_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
2250 (scsi_id->query_logins_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
2251 (scsi_id->reconnect_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
2252 (scsi_id->logout_orb_dma == scsi_id->status_block.ORB_offset_lo)) {
2253 atomic_set(&scsi_id->sbp2_login_complete, 1);
2257 if (SCpnt) {
2259 /* Complete the SCSI command. */
2260 SBP2_DEBUG("Completing SCSI command");
2261 sbp2scsi_complete_command(scsi_id, scsi_status, SCpnt,
2262 command->Current_done);
2263 SBP2_ORB_DEBUG("command orb completed");
2266 return RCODE_COMPLETE;
2269 /**************************************
2270 * SCSI interface related section
2271 **************************************/
2273 /*
2274 * This routine is the main request entry routine for doing I/O. It is
2275 * called from the scsi stack directly.
2276 */
2277 static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt,
2278 void (*done)(struct scsi_cmnd *))
2280 struct scsi_id_instance_data *scsi_id =
2281 (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
2282 struct sbp2scsi_host_info *hi;
2283 int result = DID_NO_CONNECT << 16;
2285 SBP2_DEBUG_ENTER();
2286 #if (CONFIG_IEEE1394_SBP2_DEBUG >= 2) || defined(CONFIG_IEEE1394_SBP2_PACKET_DUMP)
2287 scsi_print_command(SCpnt);
2288 #endif
2290 if (!sbp2util_node_is_available(scsi_id))
2291 goto done;
2293 hi = scsi_id->hi;
2295 if (!hi) {
2296 SBP2_ERR("sbp2scsi_host_info is NULL - this is bad!");
2297 goto done;
2300 /*
2301 * Until we handle multiple luns, just return selection time-out
2302 * to any IO directed at non-zero LUNs
2303 */
2304 if (SCpnt->device->lun)
2305 goto done;
2307 /*
2308 * Check for request sense command, and handle it here
2309 * (autorequest sense)
2310 */
2311 if (SCpnt->cmnd[0] == REQUEST_SENSE) {
2312 SBP2_DEBUG("REQUEST_SENSE");
2313 memcpy(SCpnt->request_buffer, SCpnt->sense_buffer, SCpnt->request_bufflen);
2314 memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer));
2315 sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_GOOD, SCpnt, done);
2316 return 0;
2319 /*
2320 * Check to see if we are in the middle of a bus reset.
2321 */
2322 if (!hpsb_node_entry_valid(scsi_id->ne)) {
2323 SBP2_ERR("Bus reset in progress - rejecting command");
2324 result = DID_BUS_BUSY << 16;
2325 goto done;
2328 /*
2329 * Bidirectional commands are not yet implemented,
2330 * and unknown transfer direction not handled.
2331 */
2332 if (SCpnt->sc_data_direction == DMA_BIDIRECTIONAL) {
2333 SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command");
2334 result = DID_ERROR << 16;
2335 goto done;
2338 /*
2339 * Try and send our SCSI command
2340 */
2341 if (sbp2_send_command(scsi_id, SCpnt, done)) {
2342 SBP2_ERR("Error sending SCSI command");
2343 sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_SELECTION_TIMEOUT,
2344 SCpnt, done);
2346 return 0;
2348 done:
2349 SCpnt->result = result;
2350 done(SCpnt);
2351 return 0;
2354 /*
2355 * This function is called in order to complete all outstanding SBP-2
2356 * commands (in case of resets, etc.).
2357 */
2358 static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id,
2359 u32 status)
2361 struct sbp2scsi_host_info *hi = scsi_id->hi;
2362 struct list_head *lh;
2363 struct sbp2_command_info *command;
2364 unsigned long flags;
2366 SBP2_DEBUG_ENTER();
2368 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
2369 while (!list_empty(&scsi_id->sbp2_command_orb_inuse)) {
2370 SBP2_DEBUG("Found pending command to complete");
2371 lh = scsi_id->sbp2_command_orb_inuse.next;
2372 command = list_entry(lh, struct sbp2_command_info, list);
2373 pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma,
2374 sizeof(struct sbp2_command_orb),
2375 PCI_DMA_BIDIRECTIONAL);
2376 pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma,
2377 sizeof(command->scatter_gather_element),
2378 PCI_DMA_BIDIRECTIONAL);
2379 sbp2util_mark_command_completed(scsi_id, command);
2380 if (command->Current_SCpnt) {
2381 command->Current_SCpnt->result = status << 16;
2382 command->Current_done(command->Current_SCpnt);
2385 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
2387 return;
2390 /*
2391 * This function is called in order to complete a regular SBP-2 command.
2393 * This can be called in interrupt context.
2394 */
2395 static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id,
2396 u32 scsi_status, struct scsi_cmnd *SCpnt,
2397 void (*done)(struct scsi_cmnd *))
2399 SBP2_DEBUG_ENTER();
2401 /*
2402 * Sanity
2403 */
2404 if (!SCpnt) {
2405 SBP2_ERR("SCpnt is NULL");
2406 return;
2409 /*
2410 * If a bus reset is in progress and there was an error, don't
2411 * complete the command, just let it get retried at the end of the
2412 * bus reset.
2413 */
2414 if (!hpsb_node_entry_valid(scsi_id->ne)
2415 && (scsi_status != SBP2_SCSI_STATUS_GOOD)) {
2416 SBP2_ERR("Bus reset in progress - retry command later");
2417 return;
2420 /*
2421 * Switch on scsi status
2422 */
2423 switch (scsi_status) {
2424 case SBP2_SCSI_STATUS_GOOD:
2425 SCpnt->result = DID_OK << 16;
2426 break;
2428 case SBP2_SCSI_STATUS_BUSY:
2429 SBP2_ERR("SBP2_SCSI_STATUS_BUSY");
2430 SCpnt->result = DID_BUS_BUSY << 16;
2431 break;
2433 case SBP2_SCSI_STATUS_CHECK_CONDITION:
2434 SBP2_DEBUG("SBP2_SCSI_STATUS_CHECK_CONDITION");
2435 SCpnt->result = CHECK_CONDITION << 1 | DID_OK << 16;
2436 #if CONFIG_IEEE1394_SBP2_DEBUG >= 1
2437 scsi_print_command(SCpnt);
2438 scsi_print_sense(SBP2_DEVICE_NAME, SCpnt);
2439 #endif
2440 break;
2442 case SBP2_SCSI_STATUS_SELECTION_TIMEOUT:
2443 SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT");
2444 SCpnt->result = DID_NO_CONNECT << 16;
2445 scsi_print_command(SCpnt);
2446 break;
2448 case SBP2_SCSI_STATUS_CONDITION_MET:
2449 case SBP2_SCSI_STATUS_RESERVATION_CONFLICT:
2450 case SBP2_SCSI_STATUS_COMMAND_TERMINATED:
2451 SBP2_ERR("Bad SCSI status = %x", scsi_status);
2452 SCpnt->result = DID_ERROR << 16;
2453 scsi_print_command(SCpnt);
2454 break;
2456 default:
2457 SBP2_ERR("Unsupported SCSI status = %x", scsi_status);
2458 SCpnt->result = DID_ERROR << 16;
2461 /*
2462 * If a bus reset is in progress and there was an error, complete
2463 * the command as busy so that it will get retried.
2464 */
2465 if (!hpsb_node_entry_valid(scsi_id->ne)
2466 && (scsi_status != SBP2_SCSI_STATUS_GOOD)) {
2467 SBP2_ERR("Completing command with busy (bus reset)");
2468 SCpnt->result = DID_BUS_BUSY << 16;
2471 /*
2472 * If a unit attention occurs, return busy status so it gets
2473 * retried... it could have happened because of a 1394 bus reset
2474 * or hot-plug...
2475 * XXX DID_BUS_BUSY is actually a bad idea because it will defy
2476 * the scsi layer's retry logic.
2477 */
2478 #if 0
2479 if ((scsi_status == SBP2_SCSI_STATUS_CHECK_CONDITION) &&
2480 (SCpnt->sense_buffer[2] == UNIT_ATTENTION)) {
2481 SBP2_DEBUG("UNIT ATTENTION - return busy");
2482 SCpnt->result = DID_BUS_BUSY << 16;
2484 #endif
2486 /*
2487 * Tell scsi stack that we're done with this command
2488 */
2489 done(SCpnt);
2492 static int sbp2scsi_slave_alloc(struct scsi_device *sdev)
2494 struct scsi_id_instance_data *scsi_id =
2495 (struct scsi_id_instance_data *)sdev->host->hostdata[0];
2497 scsi_id->sdev = sdev;
2499 if (scsi_id->workarounds & SBP2_WORKAROUND_INQUIRY_36)
2500 sdev->inquiry_len = 36;
2501 return 0;
2504 static int sbp2scsi_slave_configure(struct scsi_device *sdev)
2506 struct scsi_id_instance_data *scsi_id =
2507 (struct scsi_id_instance_data *)sdev->host->hostdata[0];
2509 blk_queue_dma_alignment(sdev->request_queue, (512 - 1));
2510 sdev->use_10_for_rw = 1;
2511 sdev->use_10_for_ms = 1;
2513 if (sdev->type == TYPE_DISK &&
2514 scsi_id->workarounds & SBP2_WORKAROUND_MODE_SENSE_8)
2515 sdev->skip_ms_page_8 = 1;
2516 if (scsi_id->workarounds & SBP2_WORKAROUND_FIX_CAPACITY)
2517 sdev->fix_capacity = 1;
2518 if (scsi_id->ne->guid_vendor_id == 0x0010b9 && /* Maxtor's OUI */
2519 (sdev->type == TYPE_DISK || sdev->type == TYPE_RBC))
2520 sdev->allow_restart = 1;
2521 return 0;
2524 static void sbp2scsi_slave_destroy(struct scsi_device *sdev)
2526 ((struct scsi_id_instance_data *)sdev->host->hostdata[0])->sdev = NULL;
2527 return;
2530 /*
2531 * Called by scsi stack when something has really gone wrong. Usually
2532 * called when a command has timed-out for some reason.
2533 */
2534 static int sbp2scsi_abort(struct scsi_cmnd *SCpnt)
2536 struct scsi_id_instance_data *scsi_id =
2537 (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
2538 struct sbp2scsi_host_info *hi = scsi_id->hi;
2539 struct sbp2_command_info *command;
2540 unsigned long flags;
2542 SBP2_ERR("aborting sbp2 command");
2543 scsi_print_command(SCpnt);
2545 if (sbp2util_node_is_available(scsi_id)) {
2547 /*
2548 * Right now, just return any matching command structures
2549 * to the free pool.
2550 */
2551 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
2552 command = sbp2util_find_command_for_SCpnt(scsi_id, SCpnt);
2553 if (command) {
2554 SBP2_DEBUG("Found command to abort");
2555 pci_dma_sync_single_for_cpu(hi->host->pdev,
2556 command->command_orb_dma,
2557 sizeof(struct sbp2_command_orb),
2558 PCI_DMA_BIDIRECTIONAL);
2559 pci_dma_sync_single_for_cpu(hi->host->pdev,
2560 command->sge_dma,
2561 sizeof(command->scatter_gather_element),
2562 PCI_DMA_BIDIRECTIONAL);
2563 sbp2util_mark_command_completed(scsi_id, command);
2564 if (command->Current_SCpnt) {
2565 command->Current_SCpnt->result = DID_ABORT << 16;
2566 command->Current_done(command->Current_SCpnt);
2569 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
2571 /*
2572 * Initiate a fetch agent reset.
2573 */
2574 sbp2_agent_reset(scsi_id, 0);
2575 sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY);
2578 return SUCCESS;
2581 /*
2582 * Called by scsi stack when something has really gone wrong.
2583 */
2584 static int sbp2scsi_reset(struct scsi_cmnd *SCpnt)
2586 struct scsi_id_instance_data *scsi_id =
2587 (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
2589 SBP2_ERR("reset requested");
2591 if (sbp2util_node_is_available(scsi_id)) {
2592 SBP2_ERR("Generating sbp2 fetch agent reset");
2593 sbp2_agent_reset(scsi_id, 0);
2596 return SUCCESS;
2599 static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev,
2600 struct device_attribute *attr,
2601 char *buf)
2603 struct scsi_device *sdev;
2604 struct scsi_id_instance_data *scsi_id;
2605 int lun;
2607 if (!(sdev = to_scsi_device(dev)))
2608 return 0;
2610 if (!(scsi_id = (struct scsi_id_instance_data *)sdev->host->hostdata[0]))
2611 return 0;
2613 lun = ORB_SET_LUN(scsi_id->sbp2_lun);
2615 return sprintf(buf, "%016Lx:%d:%d\n", (unsigned long long)scsi_id->ne->guid,
2616 scsi_id->ud->id, lun);
2618 static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL);
2620 static struct device_attribute *sbp2_sysfs_sdev_attrs[] = {
2621 &dev_attr_ieee1394_id,
2622 NULL
2623 };
2625 MODULE_AUTHOR("Ben Collins <bcollins@debian.org>");
2626 MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver");
2627 MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME);
2628 MODULE_LICENSE("GPL");
2630 /* SCSI host template */
2631 static struct scsi_host_template scsi_driver_template = {
2632 .module = THIS_MODULE,
2633 .name = "SBP-2 IEEE-1394",
2634 .proc_name = SBP2_DEVICE_NAME,
2635 .queuecommand = sbp2scsi_queuecommand,
2636 .eh_abort_handler = sbp2scsi_abort,
2637 .eh_device_reset_handler = sbp2scsi_reset,
2638 .slave_alloc = sbp2scsi_slave_alloc,
2639 .slave_configure = sbp2scsi_slave_configure,
2640 .slave_destroy = sbp2scsi_slave_destroy,
2641 .this_id = -1,
2642 .sg_tablesize = SG_ALL,
2643 .use_clustering = ENABLE_CLUSTERING,
2644 .cmd_per_lun = SBP2_MAX_CMDS,
2645 .can_queue = SBP2_MAX_CMDS,
2646 .emulated = 1,
2647 .sdev_attrs = sbp2_sysfs_sdev_attrs,
2648 };
2650 static int sbp2_module_init(void)
2652 int ret;
2654 SBP2_DEBUG_ENTER();
2656 /* Module load debug option to force one command at a time (serializing I/O) */
2657 if (serialize_io) {
2658 SBP2_INFO("Driver forced to serialize I/O (serialize_io=1)");
2659 SBP2_INFO("Try serialize_io=0 for better performance");
2660 scsi_driver_template.can_queue = 1;
2661 scsi_driver_template.cmd_per_lun = 1;
2664 if (sbp2_default_workarounds & SBP2_WORKAROUND_128K_MAX_TRANS &&
2665 (max_sectors * 512) > (128 * 1024))
2666 max_sectors = 128 * 1024 / 512;
2667 scsi_driver_template.max_sectors = max_sectors;
2669 /* Register our high level driver with 1394 stack */
2670 hpsb_register_highlevel(&sbp2_highlevel);
2672 ret = hpsb_register_protocol(&sbp2_driver);
2673 if (ret) {
2674 SBP2_ERR("Failed to register protocol");
2675 hpsb_unregister_highlevel(&sbp2_highlevel);
2676 return ret;
2679 return 0;
2682 static void __exit sbp2_module_exit(void)
2684 SBP2_DEBUG_ENTER();
2686 hpsb_unregister_protocol(&sbp2_driver);
2688 hpsb_unregister_highlevel(&sbp2_highlevel);
2691 module_init(sbp2_module_init);
2692 module_exit(sbp2_module_exit);