blob: 627af507643a00453a2d97cf51257ebf405cd4c3 [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
83static char version[] __devinitdata =
Ben Collins1934b8b2005-07-09 20:01:23 -040084 "$Rev: 1306 $ Ben Collins <bcollins@debian.org>";
Linus Torvalds1da177e2005-04-16 15:20:36 -070085
86/*
87 * Module load parameter definitions
88 */
89
90/*
91 * Change max_speed on module load if you have a bad IEEE-1394
92 * controller that has trouble running 2KB packets at 400mb.
93 *
94 * NOTE: On certain OHCI parts I have seen short packets on async transmit
95 * (probably due to PCI latency/throughput issues with the part). You can
96 * bump down the speed if you are running into problems.
97 */
98static int max_speed = IEEE1394_SPEED_MAX;
99module_param(max_speed, int, 0644);
100MODULE_PARM_DESC(max_speed, "Force max speed (3 = 800mb, 2 = 400mb default, 1 = 200mb, 0 = 100mb)");
101
102/*
103 * Set serialize_io to 1 if you'd like only one scsi command sent
104 * down to us at a time (debugging). This might be necessary for very
105 * badly behaved sbp2 devices.
106 */
Ben Collins1934b8b2005-07-09 20:01:23 -0400107static int serialize_io;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108module_param(serialize_io, int, 0444);
109MODULE_PARM_DESC(serialize_io, "Serialize all I/O coming down from the scsi drivers (default = 0)");
110
111/*
112 * Bump up max_sectors if you'd like to support very large sized
113 * transfers. Please note that some older sbp2 bridge chips are broken for
114 * transfers greater or equal to 128KB. Default is a value of 255
115 * sectors, or just under 128KB (at 512 byte sector size). I can note that
116 * the Oxsemi sbp2 chipsets have no problems supporting very large
117 * transfer sizes.
118 */
119static int max_sectors = SBP2_MAX_SECTORS;
120module_param(max_sectors, int, 0444);
121MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported (default = 255)");
122
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 (one such filesystem is OpenGFS,
130 * see opengfs.sourceforge.net for more info), then set exclusive_login
131 * to zero. Note: The Oxsemi OXFW911 sbp2 chipset supports up to four
132 * concurrent logins.
133 */
134static int exclusive_login = 1;
135module_param(exclusive_login, int, 0644);
136MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device (default = 1)");
137
138/*
139 * SCSI inquiry hack for really badly behaved sbp2 devices. Turn this on
140 * if your sbp2 device is not properly handling the SCSI inquiry command.
141 * This hack makes the inquiry look more like a typical MS Windows
142 * inquiry.
143 *
144 * If force_inquiry_hack=1 is required for your device to work,
145 * please submit the logged sbp2_firmware_revision value of this device to
146 * the linux1394-devel mailing list.
147 */
Ben Collins1934b8b2005-07-09 20:01:23 -0400148static int force_inquiry_hack;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149module_param(force_inquiry_hack, int, 0444);
150MODULE_PARM_DESC(force_inquiry_hack, "Force SCSI inquiry hack (default = 0)");
151
152
153/*
154 * Export information about protocols/devices supported by this driver.
155 */
156static struct ieee1394_device_id sbp2_id_table[] = {
157 {
158 .match_flags =IEEE1394_MATCH_SPECIFIER_ID |
159 IEEE1394_MATCH_VERSION,
160 .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff,
161 .version = SBP2_SW_VERSION_ENTRY & 0xffffff
162 },
163 { }
164};
165
166MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table);
167
168/*
169 * Debug levels, configured via kernel config, or enable here.
170 */
171
Olaf Hering44456d32005-07-27 11:45:17 -0700172#define CONFIG_IEEE1394_SBP2_DEBUG 0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173/* #define CONFIG_IEEE1394_SBP2_DEBUG_ORBS */
174/* #define CONFIG_IEEE1394_SBP2_DEBUG_DMA */
175/* #define CONFIG_IEEE1394_SBP2_DEBUG 1 */
176/* #define CONFIG_IEEE1394_SBP2_DEBUG 2 */
177/* #define CONFIG_IEEE1394_SBP2_PACKET_DUMP */
178
179#ifdef CONFIG_IEEE1394_SBP2_DEBUG_ORBS
180#define SBP2_ORB_DEBUG(fmt, args...) HPSB_ERR("sbp2(%s): "fmt, __FUNCTION__, ## args)
181static u32 global_outstanding_command_orbs = 0;
182#define outstanding_orb_incr global_outstanding_command_orbs++
183#define outstanding_orb_decr global_outstanding_command_orbs--
184#else
185#define SBP2_ORB_DEBUG(fmt, args...)
186#define outstanding_orb_incr
187#define outstanding_orb_decr
188#endif
189
190#ifdef CONFIG_IEEE1394_SBP2_DEBUG_DMA
191#define SBP2_DMA_ALLOC(fmt, args...) \
192 HPSB_ERR("sbp2(%s)alloc(%d): "fmt, __FUNCTION__, \
193 ++global_outstanding_dmas, ## args)
194#define SBP2_DMA_FREE(fmt, args...) \
195 HPSB_ERR("sbp2(%s)free(%d): "fmt, __FUNCTION__, \
196 --global_outstanding_dmas, ## args)
197static u32 global_outstanding_dmas = 0;
198#else
199#define SBP2_DMA_ALLOC(fmt, args...)
200#define SBP2_DMA_FREE(fmt, args...)
201#endif
202
203#if CONFIG_IEEE1394_SBP2_DEBUG >= 2
204#define SBP2_DEBUG(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
205#define SBP2_INFO(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
206#define SBP2_NOTICE(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
207#define SBP2_WARN(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
208#elif CONFIG_IEEE1394_SBP2_DEBUG == 1
209#define SBP2_DEBUG(fmt, args...) HPSB_DEBUG("sbp2: "fmt, ## args)
210#define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
211#define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args)
212#define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args)
213#else
214#define SBP2_DEBUG(fmt, args...)
215#define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
216#define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args)
217#define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args)
218#endif
219
220#define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
221
222
223/*
224 * Globals
225 */
226
227static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id,
228 u32 status);
229
230static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id,
231 u32 scsi_status, struct scsi_cmnd *SCpnt,
232 void (*done)(struct scsi_cmnd *));
233
234static struct scsi_host_template scsi_driver_template;
235
236static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC };
237
238static void sbp2_host_reset(struct hpsb_host *host);
239
240static int sbp2_probe(struct device *dev);
241static int sbp2_remove(struct device *dev);
242static int sbp2_update(struct unit_directory *ud);
243
244static struct hpsb_highlevel sbp2_highlevel = {
245 .name = SBP2_DEVICE_NAME,
246 .host_reset = sbp2_host_reset,
247};
248
249static struct hpsb_address_ops sbp2_ops = {
250 .write = sbp2_handle_status_write
251};
252
253#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
254static struct hpsb_address_ops sbp2_physdma_ops = {
255 .read = sbp2_handle_physdma_read,
256 .write = sbp2_handle_physdma_write,
257};
258#endif
259
260static struct hpsb_protocol_driver sbp2_driver = {
261 .name = "SBP2 Driver",
262 .id_table = sbp2_id_table,
263 .update = sbp2_update,
264 .driver = {
265 .name = SBP2_DEVICE_NAME,
266 .bus = &ieee1394_bus_type,
267 .probe = sbp2_probe,
268 .remove = sbp2_remove,
269 },
270};
271
272
273/* List of device firmware's that require a forced 36 byte inquiry. */
274static u32 sbp2_broken_inquiry_list[] = {
275 0x00002800, /* Stefan Richter <richtest@bauwesen.tu-cottbus.de> */
276 /* DViCO Momobay CX-1 */
277 0x00000200 /* Andreas Plesch <plesch@fas.harvard.edu> */
278 /* QPS Fire DVDBurner */
279};
280
281#define NUM_BROKEN_INQUIRY_DEVS \
282 (sizeof(sbp2_broken_inquiry_list)/sizeof(*sbp2_broken_inquiry_list))
283
284/**************************************
285 * General utility functions
286 **************************************/
287
288
289#ifndef __BIG_ENDIAN
290/*
291 * Converts a buffer from be32 to cpu byte ordering. Length is in bytes.
292 */
293static __inline__ void sbp2util_be32_to_cpu_buffer(void *buffer, int length)
294{
295 u32 *temp = buffer;
296
297 for (length = (length >> 2); length--; )
298 temp[length] = be32_to_cpu(temp[length]);
299
300 return;
301}
302
303/*
304 * Converts a buffer from cpu to be32 byte ordering. Length is in bytes.
305 */
306static __inline__ void sbp2util_cpu_to_be32_buffer(void *buffer, int length)
307{
308 u32 *temp = buffer;
309
310 for (length = (length >> 2); length--; )
311 temp[length] = cpu_to_be32(temp[length]);
312
313 return;
314}
315#else /* BIG_ENDIAN */
316/* Why waste the cpu cycles? */
317#define sbp2util_be32_to_cpu_buffer(x,y)
318#define sbp2util_cpu_to_be32_buffer(x,y)
319#endif
320
321#ifdef CONFIG_IEEE1394_SBP2_PACKET_DUMP
322/*
323 * Debug packet dump routine. Length is in bytes.
324 */
325static void sbp2util_packet_dump(void *buffer, int length, char *dump_name, u32 dump_phys_addr)
326{
327 int i;
328 unsigned char *dump = buffer;
329
330 if (!dump || !length || !dump_name)
331 return;
332
333 if (dump_phys_addr)
334 printk("[%s, 0x%x]", dump_name, dump_phys_addr);
335 else
336 printk("[%s]", dump_name);
337 for (i = 0; i < length; i++) {
338 if (i > 0x3f) {
339 printk("\n ...");
340 break;
341 }
342 if ((i & 0x3) == 0)
343 printk(" ");
344 if ((i & 0xf) == 0)
345 printk("\n ");
346 printk("%02x ", (int) dump[i]);
347 }
348 printk("\n");
349
350 return;
351}
352#else
353#define sbp2util_packet_dump(w,x,y,z)
354#endif
355
356/*
357 * Goofy routine that basically does a down_timeout function.
358 */
359static int sbp2util_down_timeout(atomic_t *done, int timeout)
360{
361 int i;
362
363 for (i = timeout; (i > 0 && atomic_read(done) == 0); i-= HZ/10) {
364 if (msleep_interruptible(100)) /* 100ms */
365 return(1);
366 }
367 return ((i > 0) ? 0:1);
368}
369
370/* Free's an allocated packet */
371static void sbp2_free_packet(struct hpsb_packet *packet)
372{
373 hpsb_free_tlabel(packet);
374 hpsb_free_packet(packet);
375}
376
377/* This is much like hpsb_node_write(), except it ignores the response
378 * subaction and returns immediately. Can be used from interrupts.
379 */
380static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr,
381 quadlet_t *buffer, size_t length)
382{
383 struct hpsb_packet *packet;
384
385 packet = hpsb_make_writepacket(ne->host, ne->nodeid,
386 addr, buffer, length);
387 if (!packet)
388 return -ENOMEM;
389
390 hpsb_set_packet_complete_task(packet, (void (*)(void*))sbp2_free_packet,
391 packet);
392
393 hpsb_node_fill_packet(ne, packet);
394
395 if (hpsb_send_packet(packet) < 0) {
396 sbp2_free_packet(packet);
397 return -EIO;
398 }
399
400 return 0;
401}
402
403/*
404 * This function is called to create a pool of command orbs used for
405 * command processing. It is called when a new sbp2 device is detected.
406 */
407static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data *scsi_id)
408{
409 struct sbp2scsi_host_info *hi = scsi_id->hi;
410 int i;
411 unsigned long flags, orbs;
412 struct sbp2_command_info *command;
413
414 orbs = serialize_io ? 2 : SBP2_MAX_CMDS;
415
416 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
417 for (i = 0; i < orbs; i++) {
418 command = (struct sbp2_command_info *)
419 kmalloc(sizeof(struct sbp2_command_info), GFP_ATOMIC);
420 if (!command) {
421 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
422 return(-ENOMEM);
423 }
424 memset(command, '\0', sizeof(struct sbp2_command_info));
425 command->command_orb_dma =
426 pci_map_single (hi->host->pdev, &command->command_orb,
427 sizeof(struct sbp2_command_orb),
428 PCI_DMA_BIDIRECTIONAL);
429 SBP2_DMA_ALLOC("single command orb DMA");
430 command->sge_dma =
431 pci_map_single (hi->host->pdev, &command->scatter_gather_element,
432 sizeof(command->scatter_gather_element),
433 PCI_DMA_BIDIRECTIONAL);
434 SBP2_DMA_ALLOC("scatter_gather_element");
435 INIT_LIST_HEAD(&command->list);
436 list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed);
437 }
438 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
439 return 0;
440}
441
442/*
443 * This function is called to delete a pool of command orbs.
444 */
445static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data *scsi_id)
446{
447 struct hpsb_host *host = scsi_id->hi->host;
448 struct list_head *lh, *next;
449 struct sbp2_command_info *command;
450 unsigned long flags;
451
452 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
453 if (!list_empty(&scsi_id->sbp2_command_orb_completed)) {
454 list_for_each_safe(lh, next, &scsi_id->sbp2_command_orb_completed) {
455 command = list_entry(lh, struct sbp2_command_info, list);
456
457 /* Release our generic DMA's */
458 pci_unmap_single(host->pdev, command->command_orb_dma,
459 sizeof(struct sbp2_command_orb),
460 PCI_DMA_BIDIRECTIONAL);
461 SBP2_DMA_FREE("single command orb DMA");
462 pci_unmap_single(host->pdev, command->sge_dma,
463 sizeof(command->scatter_gather_element),
464 PCI_DMA_BIDIRECTIONAL);
465 SBP2_DMA_FREE("scatter_gather_element");
466
467 kfree(command);
468 }
469 }
470 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
471 return;
472}
473
474/*
475 * This function finds the sbp2_command for a given outstanding command
476 * orb.Only looks at the inuse list.
477 */
478static struct sbp2_command_info *sbp2util_find_command_for_orb(
479 struct scsi_id_instance_data *scsi_id, dma_addr_t orb)
480{
481 struct sbp2_command_info *command;
482 unsigned long flags;
483
484 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
485 if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) {
486 list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) {
487 if (command->command_orb_dma == orb) {
488 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
489 return (command);
490 }
491 }
492 }
493 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
494
495 SBP2_ORB_DEBUG("could not match command orb %x", (unsigned int)orb);
496
497 return(NULL);
498}
499
500/*
501 * This function finds the sbp2_command for a given outstanding SCpnt.
502 * Only looks at the inuse list.
503 */
504static struct sbp2_command_info *sbp2util_find_command_for_SCpnt(struct scsi_id_instance_data *scsi_id, void *SCpnt)
505{
506 struct sbp2_command_info *command;
507 unsigned long flags;
508
509 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
510 if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) {
511 list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) {
512 if (command->Current_SCpnt == SCpnt) {
513 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
514 return (command);
515 }
516 }
517 }
518 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
519 return(NULL);
520}
521
522/*
523 * This function allocates a command orb used to send a scsi command.
524 */
525static struct sbp2_command_info *sbp2util_allocate_command_orb(
526 struct scsi_id_instance_data *scsi_id,
527 struct scsi_cmnd *Current_SCpnt,
528 void (*Current_done)(struct scsi_cmnd *))
529{
530 struct list_head *lh;
531 struct sbp2_command_info *command = NULL;
532 unsigned long flags;
533
534 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
535 if (!list_empty(&scsi_id->sbp2_command_orb_completed)) {
536 lh = scsi_id->sbp2_command_orb_completed.next;
537 list_del(lh);
538 command = list_entry(lh, struct sbp2_command_info, list);
539 command->Current_done = Current_done;
540 command->Current_SCpnt = Current_SCpnt;
541 list_add_tail(&command->list, &scsi_id->sbp2_command_orb_inuse);
542 } else {
543 SBP2_ERR("sbp2util_allocate_command_orb - No orbs available!");
544 }
545 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
546 return (command);
547}
548
549/* Free our DMA's */
550static void sbp2util_free_command_dma(struct sbp2_command_info *command)
551{
552 struct scsi_id_instance_data *scsi_id =
553 (struct scsi_id_instance_data *)command->Current_SCpnt->device->host->hostdata[0];
554 struct hpsb_host *host;
555
556 if (!scsi_id) {
557 printk(KERN_ERR "%s: scsi_id == NULL\n", __FUNCTION__);
558 return;
559 }
560
561 host = scsi_id->ud->ne->host;
562
563 if (command->cmd_dma) {
564 if (command->dma_type == CMD_DMA_SINGLE) {
565 pci_unmap_single(host->pdev, command->cmd_dma,
566 command->dma_size, command->dma_dir);
567 SBP2_DMA_FREE("single bulk");
568 } else if (command->dma_type == CMD_DMA_PAGE) {
569 pci_unmap_page(host->pdev, command->cmd_dma,
570 command->dma_size, command->dma_dir);
571 SBP2_DMA_FREE("single page");
572 } /* XXX: Check for CMD_DMA_NONE bug */
573 command->dma_type = CMD_DMA_NONE;
574 command->cmd_dma = 0;
575 }
576
577 if (command->sge_buffer) {
578 pci_unmap_sg(host->pdev, command->sge_buffer,
579 command->dma_size, command->dma_dir);
580 SBP2_DMA_FREE("scatter list");
581 command->sge_buffer = NULL;
582 }
583}
584
585/*
586 * This function moves a command to the completed orb list.
587 */
588static void sbp2util_mark_command_completed(struct scsi_id_instance_data *scsi_id, struct sbp2_command_info *command)
589{
590 unsigned long flags;
591
592 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
593 list_del(&command->list);
594 sbp2util_free_command_dma(command);
595 list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed);
596 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
597}
598
599
600
601/*********************************************
602 * IEEE-1394 core driver stack related section
603 *********************************************/
604static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud);
605
606static int sbp2_probe(struct device *dev)
607{
608 struct unit_directory *ud;
609 struct scsi_id_instance_data *scsi_id;
610
611 SBP2_DEBUG("sbp2_probe");
612
613 ud = container_of(dev, struct unit_directory, device);
614
615 /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s)
616 * instead. */
617 if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY)
618 return -ENODEV;
619
620 scsi_id = sbp2_alloc_device(ud);
621
622 if (!scsi_id)
623 return -ENOMEM;
624
625 sbp2_parse_unit_directory(scsi_id, ud);
626
627 return sbp2_start_device(scsi_id);
628}
629
630static int sbp2_remove(struct device *dev)
631{
632 struct unit_directory *ud;
633 struct scsi_id_instance_data *scsi_id;
634
635 SBP2_DEBUG("sbp2_remove");
636
637 ud = container_of(dev, struct unit_directory, device);
638 scsi_id = ud->device.driver_data;
639
640 sbp2_logout_device(scsi_id);
641 sbp2_remove_device(scsi_id);
642
643 return 0;
644}
645
646static int sbp2_update(struct unit_directory *ud)
647{
648 struct scsi_id_instance_data *scsi_id = ud->device.driver_data;
649
650 SBP2_DEBUG("sbp2_update");
651
652 if (sbp2_reconnect_device(scsi_id)) {
653
654 /*
655 * Ok, reconnect has failed. Perhaps we didn't
656 * reconnect fast enough. Try doing a regular login, but
657 * first do a logout just in case of any weirdness.
658 */
659 sbp2_logout_device(scsi_id);
660
661 if (sbp2_login_device(scsi_id)) {
662 /* Login failed too, just fail, and the backend
663 * will call our sbp2_remove for us */
664 SBP2_ERR("Failed to reconnect to sbp2 device!");
665 return -EBUSY;
666 }
667 }
668
669 /* Set max retries to something large on the device. */
670 sbp2_set_busy_timeout(scsi_id);
671
672 /* Do a SBP-2 fetch agent reset. */
673 sbp2_agent_reset(scsi_id, 1);
674
675 /* Get the max speed and packet size that we can use. */
676 sbp2_max_speed_and_size(scsi_id);
677
678 /* Complete any pending commands with busy (so they get
679 * retried) and remove them from our queue
680 */
681 sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY);
682
683 /* Make sure we unblock requests (since this is likely after a bus
684 * reset). */
685 scsi_unblock_requests(scsi_id->scsi_host);
686
687 return 0;
688}
689
690/* This functions is called by the sbp2_probe, for each new device. We now
691 * allocate one scsi host for each scsi_id (unit directory). */
692static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud)
693{
694 struct sbp2scsi_host_info *hi;
695 struct Scsi_Host *scsi_host = NULL;
696 struct scsi_id_instance_data *scsi_id = NULL;
697
698 SBP2_DEBUG("sbp2_alloc_device");
699
700 scsi_id = kmalloc(sizeof(*scsi_id), GFP_KERNEL);
701 if (!scsi_id) {
702 SBP2_ERR("failed to create scsi_id");
703 goto failed_alloc;
704 }
705 memset(scsi_id, 0, sizeof(*scsi_id));
706
707 scsi_id->ne = ud->ne;
708 scsi_id->ud = ud;
709 scsi_id->speed_code = IEEE1394_SPEED_100;
710 scsi_id->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100];
711 atomic_set(&scsi_id->sbp2_login_complete, 0);
712 INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_inuse);
713 INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_completed);
714 INIT_LIST_HEAD(&scsi_id->scsi_list);
715 spin_lock_init(&scsi_id->sbp2_command_orb_lock);
716 scsi_id->sbp2_device_type_and_lun = SBP2_DEVICE_TYPE_LUN_UNINITIALIZED;
717
718 ud->device.driver_data = scsi_id;
719
720 hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host);
721 if (!hi) {
722 hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host, sizeof(*hi));
723 if (!hi) {
724 SBP2_ERR("failed to allocate hostinfo");
725 goto failed_alloc;
726 }
727 SBP2_DEBUG("sbp2_alloc_device: allocated hostinfo");
728 hi->host = ud->ne->host;
729 INIT_LIST_HEAD(&hi->scsi_ids);
730
731 /* Register our sbp2 status address space... */
732 hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, &sbp2_ops,
733 SBP2_STATUS_FIFO_ADDRESS,
734 SBP2_STATUS_FIFO_ADDRESS +
735 SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(SBP2_MAX_UDS_PER_NODE+1));
736#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
737 /* Handle data movement if physical dma is not
738 * enabled/supportedon host controller */
739 hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, &sbp2_physdma_ops,
740 0x0ULL, 0xfffffffcULL);
741#endif
742 }
743
744 scsi_id->hi = hi;
745
746 list_add_tail(&scsi_id->scsi_list, &hi->scsi_ids);
747
748 /* Register our host with the SCSI stack. */
Alexandre Olivaa2ef79e2005-06-15 22:26:31 -0700749 scsi_host = scsi_host_alloc(&scsi_driver_template,
750 sizeof (unsigned long));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751 if (!scsi_host) {
752 SBP2_ERR("failed to register scsi host");
753 goto failed_alloc;
754 }
755
756 scsi_host->hostdata[0] = (unsigned long)scsi_id;
757
758 if (!scsi_add_host(scsi_host, &ud->device)) {
759 scsi_id->scsi_host = scsi_host;
760 return scsi_id;
761 }
762
763 SBP2_ERR("failed to add scsi host");
764 scsi_host_put(scsi_host);
765
766failed_alloc:
767 sbp2_remove_device(scsi_id);
768 return NULL;
769}
770
771
772static void sbp2_host_reset(struct hpsb_host *host)
773{
774 struct sbp2scsi_host_info *hi;
775 struct scsi_id_instance_data *scsi_id;
776
777 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
778
779 if (hi) {
780 list_for_each_entry(scsi_id, &hi->scsi_ids, scsi_list)
781 scsi_block_requests(scsi_id->scsi_host);
782 }
783}
784
785
786/*
787 * This function is where we first pull the node unique ids, and then
788 * allocate memory and register a SBP-2 device.
789 */
790static int sbp2_start_device(struct scsi_id_instance_data *scsi_id)
791{
792 struct sbp2scsi_host_info *hi = scsi_id->hi;
793 struct scsi_device *sdev;
794
795 SBP2_DEBUG("sbp2_start_device");
796
797 /* Login FIFO DMA */
798 scsi_id->login_response =
799 pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_login_response),
800 &scsi_id->login_response_dma);
801 if (!scsi_id->login_response)
802 goto alloc_fail;
803 SBP2_DMA_ALLOC("consistent DMA region for login FIFO");
804
805 /* Query logins ORB DMA */
806 scsi_id->query_logins_orb =
807 pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_query_logins_orb),
808 &scsi_id->query_logins_orb_dma);
809 if (!scsi_id->query_logins_orb)
810 goto alloc_fail;
811 SBP2_DMA_ALLOC("consistent DMA region for query logins ORB");
812
813 /* Query logins response DMA */
814 scsi_id->query_logins_response =
815 pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_query_logins_response),
816 &scsi_id->query_logins_response_dma);
817 if (!scsi_id->query_logins_response)
818 goto alloc_fail;
819 SBP2_DMA_ALLOC("consistent DMA region for query logins response");
820
821 /* Reconnect ORB DMA */
822 scsi_id->reconnect_orb =
823 pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_reconnect_orb),
824 &scsi_id->reconnect_orb_dma);
825 if (!scsi_id->reconnect_orb)
826 goto alloc_fail;
827 SBP2_DMA_ALLOC("consistent DMA region for reconnect ORB");
828
829 /* Logout ORB DMA */
830 scsi_id->logout_orb =
831 pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_logout_orb),
832 &scsi_id->logout_orb_dma);
833 if (!scsi_id->logout_orb)
834 goto alloc_fail;
835 SBP2_DMA_ALLOC("consistent DMA region for logout ORB");
836
837 /* Login ORB DMA */
838 scsi_id->login_orb =
839 pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_login_orb),
840 &scsi_id->login_orb_dma);
841 if (!scsi_id->login_orb) {
842alloc_fail:
843 if (scsi_id->query_logins_response) {
844 pci_free_consistent(hi->host->pdev,
845 sizeof(struct sbp2_query_logins_response),
846 scsi_id->query_logins_response,
847 scsi_id->query_logins_response_dma);
848 SBP2_DMA_FREE("query logins response DMA");
849 }
850
851 if (scsi_id->query_logins_orb) {
852 pci_free_consistent(hi->host->pdev,
853 sizeof(struct sbp2_query_logins_orb),
854 scsi_id->query_logins_orb,
855 scsi_id->query_logins_orb_dma);
856 SBP2_DMA_FREE("query logins ORB DMA");
857 }
858
859 if (scsi_id->logout_orb) {
860 pci_free_consistent(hi->host->pdev,
861 sizeof(struct sbp2_logout_orb),
862 scsi_id->logout_orb,
863 scsi_id->logout_orb_dma);
864 SBP2_DMA_FREE("logout ORB DMA");
865 }
866
867 if (scsi_id->reconnect_orb) {
868 pci_free_consistent(hi->host->pdev,
869 sizeof(struct sbp2_reconnect_orb),
870 scsi_id->reconnect_orb,
871 scsi_id->reconnect_orb_dma);
872 SBP2_DMA_FREE("reconnect ORB DMA");
873 }
874
875 if (scsi_id->login_response) {
876 pci_free_consistent(hi->host->pdev,
877 sizeof(struct sbp2_login_response),
878 scsi_id->login_response,
879 scsi_id->login_response_dma);
880 SBP2_DMA_FREE("login FIFO DMA");
881 }
882
883 list_del(&scsi_id->scsi_list);
884
885 kfree(scsi_id);
886
887 SBP2_ERR ("Could not allocate memory for scsi_id");
888
889 return -ENOMEM;
890 }
891 SBP2_DMA_ALLOC("consistent DMA region for login ORB");
892
893 SBP2_DEBUG("New SBP-2 device inserted, SCSI ID = %x", scsi_id->ud->id);
894
895 /*
896 * Create our command orb pool
897 */
898 if (sbp2util_create_command_orb_pool(scsi_id)) {
899 SBP2_ERR("sbp2util_create_command_orb_pool failed!");
900 sbp2_remove_device(scsi_id);
901 return -ENOMEM;
902 }
903
904 /* Schedule a timeout here. The reason is that we may be so close
905 * to a bus reset, that the device is not available for logins.
906 * This can happen when the bus reset is caused by the host
907 * connected to the sbp2 device being removed. That host would
908 * have a certain amount of time to relogin before the sbp2 device
909 * allows someone else to login instead. One second makes sense. */
910 msleep_interruptible(1000);
911 if (signal_pending(current)) {
912 SBP2_WARN("aborting sbp2_start_device due to event");
913 sbp2_remove_device(scsi_id);
914 return -EINTR;
915 }
916
917 /*
918 * Login to the sbp-2 device
919 */
920 if (sbp2_login_device(scsi_id)) {
921 /* Login failed, just remove the device. */
922 sbp2_remove_device(scsi_id);
923 return -EBUSY;
924 }
925
926 /*
927 * Set max retries to something large on the device
928 */
929 sbp2_set_busy_timeout(scsi_id);
930
931 /*
932 * Do a SBP-2 fetch agent reset
933 */
934 sbp2_agent_reset(scsi_id, 1);
935
936 /*
937 * Get the max speed and packet size that we can use
938 */
939 sbp2_max_speed_and_size(scsi_id);
940
941 /* Add this device to the scsi layer now */
942 sdev = scsi_add_device(scsi_id->scsi_host, 0, scsi_id->ud->id, 0);
943 if (IS_ERR(sdev)) {
944 SBP2_ERR("scsi_add_device failed");
945 return PTR_ERR(sdev);
946 }
947
948 return 0;
949}
950
951/*
952 * This function removes an sbp2 device from the sbp2scsi_host_info struct.
953 */
954static void sbp2_remove_device(struct scsi_id_instance_data *scsi_id)
955{
956 struct sbp2scsi_host_info *hi;
957
958 SBP2_DEBUG("sbp2_remove_device");
959
960 if (!scsi_id)
961 return;
962
963 hi = scsi_id->hi;
964
965 /* This will remove our scsi device aswell */
966 if (scsi_id->scsi_host) {
967 scsi_remove_host(scsi_id->scsi_host);
968 scsi_host_put(scsi_id->scsi_host);
969 }
970
971 sbp2util_remove_command_orb_pool(scsi_id);
972
973 list_del(&scsi_id->scsi_list);
974
975 if (scsi_id->login_response) {
976 pci_free_consistent(hi->host->pdev,
977 sizeof(struct sbp2_login_response),
978 scsi_id->login_response,
979 scsi_id->login_response_dma);
980 SBP2_DMA_FREE("single login FIFO");
981 }
982
983 if (scsi_id->login_orb) {
984 pci_free_consistent(hi->host->pdev,
985 sizeof(struct sbp2_login_orb),
986 scsi_id->login_orb,
987 scsi_id->login_orb_dma);
988 SBP2_DMA_FREE("single login ORB");
989 }
990
991 if (scsi_id->reconnect_orb) {
992 pci_free_consistent(hi->host->pdev,
993 sizeof(struct sbp2_reconnect_orb),
994 scsi_id->reconnect_orb,
995 scsi_id->reconnect_orb_dma);
996 SBP2_DMA_FREE("single reconnect orb");
997 }
998
999 if (scsi_id->logout_orb) {
1000 pci_free_consistent(hi->host->pdev,
1001 sizeof(struct sbp2_logout_orb),
1002 scsi_id->logout_orb,
1003 scsi_id->logout_orb_dma);
1004 SBP2_DMA_FREE("single logout orb");
1005 }
1006
1007 if (scsi_id->query_logins_orb) {
1008 pci_free_consistent(hi->host->pdev,
1009 sizeof(struct sbp2_query_logins_orb),
1010 scsi_id->query_logins_orb,
1011 scsi_id->query_logins_orb_dma);
1012 SBP2_DMA_FREE("single query logins orb");
1013 }
1014
1015 if (scsi_id->query_logins_response) {
1016 pci_free_consistent(hi->host->pdev,
1017 sizeof(struct sbp2_query_logins_response),
1018 scsi_id->query_logins_response,
1019 scsi_id->query_logins_response_dma);
1020 SBP2_DMA_FREE("single query logins data");
1021 }
1022
1023 scsi_id->ud->device.driver_data = NULL;
1024
1025 SBP2_DEBUG("SBP-2 device removed, SCSI ID = %d", scsi_id->ud->id);
1026
1027 kfree(scsi_id);
1028}
1029
1030#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
1031/*
1032 * This function deals with physical dma write requests (for adapters that do not support
1033 * physical dma in hardware). Mostly just here for debugging...
1034 */
1035static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid, int destid, quadlet_t *data,
1036 u64 addr, size_t length, u16 flags)
1037{
1038
1039 /*
1040 * Manually put the data in the right place.
1041 */
1042 memcpy(bus_to_virt((u32)addr), data, length);
1043 sbp2util_packet_dump(data, length, "sbp2 phys dma write by device", (u32)addr);
1044 return(RCODE_COMPLETE);
1045}
1046
1047/*
1048 * This function deals with physical dma read requests (for adapters that do not support
1049 * physical dma in hardware). Mostly just here for debugging...
1050 */
1051static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid, quadlet_t *data,
1052 u64 addr, size_t length, u16 flags)
1053{
1054
1055 /*
1056 * Grab data from memory and send a read response.
1057 */
1058 memcpy(data, bus_to_virt((u32)addr), length);
1059 sbp2util_packet_dump(data, length, "sbp2 phys dma read by device", (u32)addr);
1060 return(RCODE_COMPLETE);
1061}
1062#endif
1063
1064
1065/**************************************
1066 * SBP-2 protocol related section
1067 **************************************/
1068
1069/*
1070 * This function determines if we should convert scsi commands for a particular sbp2 device type
1071 */
1072static __inline__ int sbp2_command_conversion_device_type(u8 device_type)
1073{
1074 return (((device_type == TYPE_DISK) ||
Al Viro 631e8a12005-05-16 01:59:55 +01001075 (device_type == TYPE_RBC) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076 (device_type == TYPE_ROM)) ? 1:0);
1077}
1078
1079/*
1080 * This function queries the device for the maximum concurrent logins it
1081 * supports.
1082 */
1083static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id)
1084{
1085 struct sbp2scsi_host_info *hi = scsi_id->hi;
1086 quadlet_t data[2];
1087 int max_logins;
1088 int active_logins;
1089
1090 SBP2_DEBUG("sbp2_query_logins");
1091
1092 scsi_id->query_logins_orb->reserved1 = 0x0;
1093 scsi_id->query_logins_orb->reserved2 = 0x0;
1094
1095 scsi_id->query_logins_orb->query_response_lo = scsi_id->query_logins_response_dma;
1096 scsi_id->query_logins_orb->query_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
1097 SBP2_DEBUG("sbp2_query_logins: query_response_hi/lo initialized");
1098
1099 scsi_id->query_logins_orb->lun_misc = ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST);
1100 scsi_id->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1);
1101 if (scsi_id->sbp2_device_type_and_lun != SBP2_DEVICE_TYPE_LUN_UNINITIALIZED) {
1102 scsi_id->query_logins_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun);
1103 SBP2_DEBUG("sbp2_query_logins: set lun to %d",
1104 ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun));
1105 }
1106 SBP2_DEBUG("sbp2_query_logins: lun_misc initialized");
1107
1108 scsi_id->query_logins_orb->reserved_resp_length =
1109 ORB_SET_QUERY_LOGINS_RESP_LENGTH(sizeof(struct sbp2_query_logins_response));
1110 SBP2_DEBUG("sbp2_query_logins: reserved_resp_length initialized");
1111
1112 scsi_id->query_logins_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO +
1113 SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id);
1114 scsi_id->query_logins_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) |
1115 SBP2_STATUS_FIFO_ADDRESS_HI);
1116 SBP2_DEBUG("sbp2_query_logins: status FIFO initialized");
1117
1118 sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb));
1119
1120 SBP2_DEBUG("sbp2_query_logins: orb byte-swapped");
1121
1122 sbp2util_packet_dump(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb),
1123 "sbp2 query logins orb", scsi_id->query_logins_orb_dma);
1124
1125 memset(scsi_id->query_logins_response, 0, sizeof(struct sbp2_query_logins_response));
1126 memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
1127
1128 SBP2_DEBUG("sbp2_query_logins: query_logins_response/status FIFO memset");
1129
1130 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1131 data[1] = scsi_id->query_logins_orb_dma;
1132 sbp2util_cpu_to_be32_buffer(data, 8);
1133
1134 atomic_set(&scsi_id->sbp2_login_complete, 0);
1135
1136 SBP2_DEBUG("sbp2_query_logins: prepared to write");
1137 hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8);
1138 SBP2_DEBUG("sbp2_query_logins: written");
1139
1140 if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 2*HZ)) {
1141 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1142 return(-EIO);
1143 }
1144
1145 if (scsi_id->status_block.ORB_offset_lo != scsi_id->query_logins_orb_dma) {
1146 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1147 return(-EIO);
1148 }
1149
1150 if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
1151 STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
1152 STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
1153
1154 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1155 return(-EIO);
1156 }
1157
1158 sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_response, sizeof(struct sbp2_query_logins_response));
1159
1160 SBP2_DEBUG("length_max_logins = %x",
1161 (unsigned int)scsi_id->query_logins_response->length_max_logins);
1162
1163 SBP2_DEBUG("Query logins to SBP-2 device successful");
1164
1165 max_logins = RESPONSE_GET_MAX_LOGINS(scsi_id->query_logins_response->length_max_logins);
1166 SBP2_DEBUG("Maximum concurrent logins supported: %d", max_logins);
1167
1168 active_logins = RESPONSE_GET_ACTIVE_LOGINS(scsi_id->query_logins_response->length_max_logins);
1169 SBP2_DEBUG("Number of active logins: %d", active_logins);
1170
1171 if (active_logins >= max_logins) {
1172 return(-EIO);
1173 }
1174
1175 return 0;
1176}
1177
1178/*
1179 * This function is called in order to login to a particular SBP-2 device,
1180 * after a bus reset.
1181 */
1182static int sbp2_login_device(struct scsi_id_instance_data *scsi_id)
1183{
1184 struct sbp2scsi_host_info *hi = scsi_id->hi;
1185 quadlet_t data[2];
1186
1187 SBP2_DEBUG("sbp2_login_device");
1188
1189 if (!scsi_id->login_orb) {
1190 SBP2_DEBUG("sbp2_login_device: login_orb not alloc'd!");
1191 return(-EIO);
1192 }
1193
1194 if (!exclusive_login) {
1195 if (sbp2_query_logins(scsi_id)) {
1196 SBP2_INFO("Device does not support any more concurrent logins");
1197 return(-EIO);
1198 }
1199 }
1200
1201 /* Set-up login ORB, assume no password */
1202 scsi_id->login_orb->password_hi = 0;
1203 scsi_id->login_orb->password_lo = 0;
1204 SBP2_DEBUG("sbp2_login_device: password_hi/lo initialized");
1205
1206 scsi_id->login_orb->login_response_lo = scsi_id->login_response_dma;
1207 scsi_id->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
1208 SBP2_DEBUG("sbp2_login_device: login_response_hi/lo initialized");
1209
1210 scsi_id->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST);
1211 scsi_id->login_orb->lun_misc |= ORB_SET_RECONNECT(0); /* One second reconnect time */
1212 scsi_id->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(exclusive_login); /* Exclusive access to device */
1213 scsi_id->login_orb->lun_misc |= ORB_SET_NOTIFY(1); /* Notify us of login complete */
1214 /* Set the lun if we were able to pull it from the device's unit directory */
1215 if (scsi_id->sbp2_device_type_and_lun != SBP2_DEVICE_TYPE_LUN_UNINITIALIZED) {
1216 scsi_id->login_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun);
1217 SBP2_DEBUG("sbp2_query_logins: set lun to %d",
1218 ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun));
1219 }
1220 SBP2_DEBUG("sbp2_login_device: lun_misc initialized");
1221
1222 scsi_id->login_orb->passwd_resp_lengths =
1223 ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response));
1224 SBP2_DEBUG("sbp2_login_device: passwd_resp_lengths initialized");
1225
1226 scsi_id->login_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO +
1227 SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id);
1228 scsi_id->login_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) |
1229 SBP2_STATUS_FIFO_ADDRESS_HI);
1230 SBP2_DEBUG("sbp2_login_device: status FIFO initialized");
1231
1232 /*
1233 * Byte swap ORB if necessary
1234 */
1235 sbp2util_cpu_to_be32_buffer(scsi_id->login_orb, sizeof(struct sbp2_login_orb));
1236
1237 SBP2_DEBUG("sbp2_login_device: orb byte-swapped");
1238
1239 sbp2util_packet_dump(scsi_id->login_orb, sizeof(struct sbp2_login_orb),
1240 "sbp2 login orb", scsi_id->login_orb_dma);
1241
1242 /*
1243 * Initialize login response and status fifo
1244 */
1245 memset(scsi_id->login_response, 0, sizeof(struct sbp2_login_response));
1246 memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
1247
1248 SBP2_DEBUG("sbp2_login_device: login_response/status FIFO memset");
1249
1250 /*
1251 * Ok, let's write to the target's management agent register
1252 */
1253 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1254 data[1] = scsi_id->login_orb_dma;
1255 sbp2util_cpu_to_be32_buffer(data, 8);
1256
1257 atomic_set(&scsi_id->sbp2_login_complete, 0);
1258
1259 SBP2_DEBUG("sbp2_login_device: prepared to write to %08x",
1260 (unsigned int)scsi_id->sbp2_management_agent_addr);
1261 hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8);
1262 SBP2_DEBUG("sbp2_login_device: written");
1263
1264 /*
1265 * Wait for login status (up to 20 seconds)...
1266 */
1267 if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 20*HZ)) {
1268 SBP2_ERR("Error logging into SBP-2 device - login timed-out");
1269 return(-EIO);
1270 }
1271
1272 /*
1273 * Sanity. Make sure status returned matches login orb.
1274 */
1275 if (scsi_id->status_block.ORB_offset_lo != scsi_id->login_orb_dma) {
1276 SBP2_ERR("Error logging into SBP-2 device - login timed-out");
1277 return(-EIO);
1278 }
1279
1280 /*
1281 * Check status
1282 */
1283 if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
1284 STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
1285 STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
1286
1287 SBP2_ERR("Error logging into SBP-2 device - login failed");
1288 return(-EIO);
1289 }
1290
1291 /*
1292 * Byte swap the login response, for use when reconnecting or
1293 * logging out.
1294 */
1295 sbp2util_cpu_to_be32_buffer(scsi_id->login_response, sizeof(struct sbp2_login_response));
1296
1297 /*
1298 * Grab our command block agent address from the login response.
1299 */
1300 SBP2_DEBUG("command_block_agent_hi = %x",
1301 (unsigned int)scsi_id->login_response->command_block_agent_hi);
1302 SBP2_DEBUG("command_block_agent_lo = %x",
1303 (unsigned int)scsi_id->login_response->command_block_agent_lo);
1304
1305 scsi_id->sbp2_command_block_agent_addr =
1306 ((u64)scsi_id->login_response->command_block_agent_hi) << 32;
1307 scsi_id->sbp2_command_block_agent_addr |= ((u64)scsi_id->login_response->command_block_agent_lo);
1308 scsi_id->sbp2_command_block_agent_addr &= 0x0000ffffffffffffULL;
1309
1310 SBP2_INFO("Logged into SBP-2 device");
1311
1312 return(0);
1313
1314}
1315
1316/*
1317 * This function is called in order to logout from a particular SBP-2
1318 * device, usually called during driver unload.
1319 */
1320static int sbp2_logout_device(struct scsi_id_instance_data *scsi_id)
1321{
1322 struct sbp2scsi_host_info *hi = scsi_id->hi;
1323 quadlet_t data[2];
1324 int error;
1325
1326 SBP2_DEBUG("sbp2_logout_device");
1327
1328 /*
1329 * Set-up logout ORB
1330 */
1331 scsi_id->logout_orb->reserved1 = 0x0;
1332 scsi_id->logout_orb->reserved2 = 0x0;
1333 scsi_id->logout_orb->reserved3 = 0x0;
1334 scsi_id->logout_orb->reserved4 = 0x0;
1335
1336 scsi_id->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST);
1337 scsi_id->logout_orb->login_ID_misc |= ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID);
1338
1339 /* Notify us when complete */
1340 scsi_id->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1341
1342 scsi_id->logout_orb->reserved5 = 0x0;
1343 scsi_id->logout_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO +
1344 SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id);
1345 scsi_id->logout_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) |
1346 SBP2_STATUS_FIFO_ADDRESS_HI);
1347
1348 /*
1349 * Byte swap ORB if necessary
1350 */
1351 sbp2util_cpu_to_be32_buffer(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb));
1352
1353 sbp2util_packet_dump(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb),
1354 "sbp2 logout orb", scsi_id->logout_orb_dma);
1355
1356 /*
1357 * Ok, let's write to the target's management agent register
1358 */
1359 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1360 data[1] = scsi_id->logout_orb_dma;
1361 sbp2util_cpu_to_be32_buffer(data, 8);
1362
1363 atomic_set(&scsi_id->sbp2_login_complete, 0);
1364
1365 error = hpsb_node_write(scsi_id->ne,
1366 scsi_id->sbp2_management_agent_addr,
1367 data, 8);
1368 if (error)
1369 return error;
1370
1371 /* Wait for device to logout...1 second. */
1372 if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ))
1373 return -EIO;
1374
1375 SBP2_INFO("Logged out of SBP-2 device");
1376
1377 return(0);
1378
1379}
1380
1381/*
1382 * This function is called in order to reconnect to a particular SBP-2
1383 * device, after a bus reset.
1384 */
1385static int sbp2_reconnect_device(struct scsi_id_instance_data *scsi_id)
1386{
1387 struct sbp2scsi_host_info *hi = scsi_id->hi;
1388 quadlet_t data[2];
1389 int error;
1390
1391 SBP2_DEBUG("sbp2_reconnect_device");
1392
1393 /*
1394 * Set-up reconnect ORB
1395 */
1396 scsi_id->reconnect_orb->reserved1 = 0x0;
1397 scsi_id->reconnect_orb->reserved2 = 0x0;
1398 scsi_id->reconnect_orb->reserved3 = 0x0;
1399 scsi_id->reconnect_orb->reserved4 = 0x0;
1400
1401 scsi_id->reconnect_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST);
1402 scsi_id->reconnect_orb->login_ID_misc |=
1403 ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID);
1404
1405 /* Notify us when complete */
1406 scsi_id->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1407
1408 scsi_id->reconnect_orb->reserved5 = 0x0;
1409 scsi_id->reconnect_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO +
1410 SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id);
1411 scsi_id->reconnect_orb->status_FIFO_hi =
1412 (ORB_SET_NODE_ID(hi->host->node_id) | SBP2_STATUS_FIFO_ADDRESS_HI);
1413
1414 /*
1415 * Byte swap ORB if necessary
1416 */
1417 sbp2util_cpu_to_be32_buffer(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb));
1418
1419 sbp2util_packet_dump(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb),
1420 "sbp2 reconnect orb", scsi_id->reconnect_orb_dma);
1421
1422 /*
1423 * Initialize status fifo
1424 */
1425 memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
1426
1427 /*
1428 * Ok, let's write to the target's management agent register
1429 */
1430 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1431 data[1] = scsi_id->reconnect_orb_dma;
1432 sbp2util_cpu_to_be32_buffer(data, 8);
1433
1434 atomic_set(&scsi_id->sbp2_login_complete, 0);
1435
1436 error = hpsb_node_write(scsi_id->ne,
1437 scsi_id->sbp2_management_agent_addr,
1438 data, 8);
1439 if (error)
1440 return error;
1441
1442 /*
1443 * Wait for reconnect status (up to 1 second)...
1444 */
1445 if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ)) {
1446 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out");
1447 return(-EIO);
1448 }
1449
1450 /*
1451 * Sanity. Make sure status returned matches reconnect orb.
1452 */
1453 if (scsi_id->status_block.ORB_offset_lo != scsi_id->reconnect_orb_dma) {
1454 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out");
1455 return(-EIO);
1456 }
1457
1458 /*
1459 * Check status
1460 */
1461 if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
1462 STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
1463 STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
1464
1465 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect failed");
1466 return(-EIO);
1467 }
1468
1469 HPSB_DEBUG("Reconnected to SBP-2 device");
1470
1471 return(0);
1472
1473}
1474
1475/*
1476 * This function is called in order to set the busy timeout (number of
1477 * retries to attempt) on the sbp2 device.
1478 */
1479static int sbp2_set_busy_timeout(struct scsi_id_instance_data *scsi_id)
1480{
1481 quadlet_t data;
1482
1483 SBP2_DEBUG("sbp2_set_busy_timeout");
1484
1485 /*
1486 * Ok, let's write to the target's busy timeout register
1487 */
1488 data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE);
1489
1490 if (hpsb_node_write(scsi_id->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4)) {
1491 SBP2_ERR("sbp2_set_busy_timeout error");
1492 }
1493
1494 return(0);
1495}
1496
1497
1498/*
1499 * This function is called to parse sbp2 device's config rom unit
1500 * directory. Used to determine things like sbp2 management agent offset,
1501 * and command set used (SCSI or RBC).
1502 */
1503static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id,
1504 struct unit_directory *ud)
1505{
1506 struct csr1212_keyval *kv;
1507 struct csr1212_dentry *dentry;
1508 u64 management_agent_addr;
1509 u32 command_set_spec_id, command_set, unit_characteristics,
1510 firmware_revision, workarounds;
1511 int i;
1512
1513 SBP2_DEBUG("sbp2_parse_unit_directory");
1514
1515 management_agent_addr = 0x0;
1516 command_set_spec_id = 0x0;
1517 command_set = 0x0;
1518 unit_characteristics = 0x0;
1519 firmware_revision = 0x0;
1520
1521 /* Handle different fields in the unit directory, based on keys */
1522 csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) {
1523 switch (kv->key.id) {
1524 case CSR1212_KV_ID_DEPENDENT_INFO:
1525 if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET) {
1526 /* Save off the management agent address */
1527 management_agent_addr =
1528 CSR1212_REGISTER_SPACE_BASE +
1529 (kv->value.csr_offset << 2);
1530
1531 SBP2_DEBUG("sbp2_management_agent_addr = %x",
1532 (unsigned int) management_agent_addr);
1533 } else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
1534 scsi_id->sbp2_device_type_and_lun = kv->value.immediate;
1535 }
1536 break;
1537
1538 case SBP2_COMMAND_SET_SPEC_ID_KEY:
1539 /* Command spec organization */
1540 command_set_spec_id = kv->value.immediate;
1541 SBP2_DEBUG("sbp2_command_set_spec_id = %x",
1542 (unsigned int) command_set_spec_id);
1543 break;
1544
1545 case SBP2_COMMAND_SET_KEY:
1546 /* Command set used by sbp2 device */
1547 command_set = kv->value.immediate;
1548 SBP2_DEBUG("sbp2_command_set = %x",
1549 (unsigned int) command_set);
1550 break;
1551
1552 case SBP2_UNIT_CHARACTERISTICS_KEY:
1553 /*
1554 * Unit characterisitcs (orb related stuff
1555 * that I'm not yet paying attention to)
1556 */
1557 unit_characteristics = kv->value.immediate;
1558 SBP2_DEBUG("sbp2_unit_characteristics = %x",
1559 (unsigned int) unit_characteristics);
1560 break;
1561
1562 case SBP2_FIRMWARE_REVISION_KEY:
1563 /* Firmware revision */
1564 firmware_revision = kv->value.immediate;
1565 if (force_inquiry_hack)
1566 SBP2_INFO("sbp2_firmware_revision = %x",
1567 (unsigned int) firmware_revision);
1568 else SBP2_DEBUG("sbp2_firmware_revision = %x",
1569 (unsigned int) firmware_revision);
1570 break;
1571
1572 default:
1573 break;
1574 }
1575 }
1576
1577 /* This is the start of our broken device checking. We try to hack
1578 * around oddities and known defects. */
1579 workarounds = 0x0;
1580
1581 /* If the vendor id is 0xa0b8 (Symbios vendor id), then we have a
1582 * bridge with 128KB max transfer size limitation. For sanity, we
1583 * only voice this when the current max_sectors setting
1584 * exceeds the 128k limit. By default, that is not the case.
1585 *
1586 * It would be really nice if we could detect this before the scsi
1587 * host gets initialized. That way we can down-force the
1588 * max_sectors to account for it. That is not currently
1589 * possible. */
1590 if ((firmware_revision & 0xffff00) ==
1591 SBP2_128KB_BROKEN_FIRMWARE &&
1592 (max_sectors * 512) > (128*1024)) {
1593 SBP2_WARN("Node " NODE_BUS_FMT ": Bridge only supports 128KB max transfer size.",
1594 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid));
1595 SBP2_WARN("WARNING: Current max_sectors setting is larger than 128KB (%d sectors)!",
1596 max_sectors);
1597 workarounds |= SBP2_BREAKAGE_128K_MAX_TRANSFER;
1598 }
1599
1600 /* Check for a blacklisted set of devices that require us to force
1601 * a 36 byte host inquiry. This can be overriden as a module param
1602 * (to force all hosts). */
1603 for (i = 0; i < NUM_BROKEN_INQUIRY_DEVS; i++) {
1604 if ((firmware_revision & 0xffff00) ==
1605 sbp2_broken_inquiry_list[i]) {
1606 SBP2_WARN("Node " NODE_BUS_FMT ": Using 36byte inquiry workaround",
1607 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid));
1608 workarounds |= SBP2_BREAKAGE_INQUIRY_HACK;
1609 break; /* No need to continue. */
1610 }
1611 }
1612
1613 /* If this is a logical unit directory entry, process the parent
1614 * to get the values. */
1615 if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) {
1616 struct unit_directory *parent_ud =
1617 container_of(ud->device.parent, struct unit_directory, device);
1618 sbp2_parse_unit_directory(scsi_id, parent_ud);
1619 } else {
1620 scsi_id->sbp2_management_agent_addr = management_agent_addr;
1621 scsi_id->sbp2_command_set_spec_id = command_set_spec_id;
1622 scsi_id->sbp2_command_set = command_set;
1623 scsi_id->sbp2_unit_characteristics = unit_characteristics;
1624 scsi_id->sbp2_firmware_revision = firmware_revision;
1625 scsi_id->workarounds = workarounds;
1626 if (ud->flags & UNIT_DIRECTORY_HAS_LUN)
1627 scsi_id->sbp2_device_type_and_lun = ud->lun;
1628 }
1629}
1630
1631/*
1632 * This function is called in order to determine the max speed and packet
1633 * size we can use in our ORBs. Note, that we (the driver and host) only
1634 * initiate the transaction. The SBP-2 device actually transfers the data
1635 * (by reading from the DMA area we tell it). This means that the SBP-2
1636 * device decides the actual maximum data it can transfer. We just tell it
1637 * the speed that it needs to use, and the max_rec the host supports, and
1638 * it takes care of the rest.
1639 */
1640static int sbp2_max_speed_and_size(struct scsi_id_instance_data *scsi_id)
1641{
1642 struct sbp2scsi_host_info *hi = scsi_id->hi;
1643
1644 SBP2_DEBUG("sbp2_max_speed_and_size");
1645
1646 /* Initial setting comes from the hosts speed map */
1647 scsi_id->speed_code = hi->host->speed_map[NODEID_TO_NODE(hi->host->node_id) * 64
1648 + NODEID_TO_NODE(scsi_id->ne->nodeid)];
1649
1650 /* Bump down our speed if the user requested it */
1651 if (scsi_id->speed_code > max_speed) {
1652 scsi_id->speed_code = max_speed;
1653 SBP2_ERR("Forcing SBP-2 max speed down to %s",
1654 hpsb_speedto_str[scsi_id->speed_code]);
1655 }
1656
1657 /* Payload size is the lesser of what our speed supports and what
1658 * our host supports. */
1659 scsi_id->max_payload_size = min(sbp2_speedto_max_payload[scsi_id->speed_code],
1660 (u8)(hi->host->csr.max_rec - 1));
1661
1662 HPSB_DEBUG("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]",
1663 NODE_BUS_ARGS(hi->host, scsi_id->ne->nodeid),
1664 hpsb_speedto_str[scsi_id->speed_code],
1665 1 << ((u32)scsi_id->max_payload_size + 2));
1666
1667 return(0);
1668}
1669
1670/*
1671 * This function is called in order to perform a SBP-2 agent reset.
1672 */
1673static int sbp2_agent_reset(struct scsi_id_instance_data *scsi_id, int wait)
1674{
1675 quadlet_t data;
1676 u64 addr;
1677 int retval;
1678
1679 SBP2_DEBUG("sbp2_agent_reset");
1680
1681 /*
1682 * Ok, let's write to the target's management agent register
1683 */
1684 data = ntohl(SBP2_AGENT_RESET_DATA);
1685 addr = scsi_id->sbp2_command_block_agent_addr + SBP2_AGENT_RESET_OFFSET;
1686
1687 if (wait)
1688 retval = hpsb_node_write(scsi_id->ne, addr, &data, 4);
1689 else
1690 retval = sbp2util_node_write_no_wait(scsi_id->ne, addr, &data, 4);
1691
1692 if (retval < 0) {
1693 SBP2_ERR("hpsb_node_write failed.\n");
1694 return -EIO;
1695 }
1696
1697 /*
1698 * Need to make sure orb pointer is written on next command
1699 */
1700 scsi_id->last_orb = NULL;
1701
1702 return(0);
1703}
1704
1705/*
1706 * This function is called to create the actual command orb and s/g list
1707 * out of the scsi command itself.
1708 */
1709static int sbp2_create_command_orb(struct scsi_id_instance_data *scsi_id,
1710 struct sbp2_command_info *command,
1711 unchar *scsi_cmd,
1712 unsigned int scsi_use_sg,
1713 unsigned int scsi_request_bufflen,
1714 void *scsi_request_buffer,
1715 enum dma_data_direction dma_dir)
1716
1717{
1718 struct sbp2scsi_host_info *hi = scsi_id->hi;
1719 struct scatterlist *sgpnt = (struct scatterlist *) scsi_request_buffer;
1720 struct sbp2_command_orb *command_orb = &command->command_orb;
1721 struct sbp2_unrestricted_page_table *scatter_gather_element =
1722 &command->scatter_gather_element[0];
1723 u32 sg_count, sg_len, orb_direction;
1724 dma_addr_t sg_addr;
1725 int i;
1726
1727 /*
1728 * Set-up our command ORB..
1729 *
1730 * NOTE: We're doing unrestricted page tables (s/g), as this is
1731 * best performance (at least with the devices I have). This means
1732 * that data_size becomes the number of s/g elements, and
1733 * page_size should be zero (for unrestricted).
1734 */
1735 command_orb->next_ORB_hi = ORB_SET_NULL_PTR(1);
1736 command_orb->next_ORB_lo = 0x0;
1737 command_orb->misc = ORB_SET_MAX_PAYLOAD(scsi_id->max_payload_size);
1738 command_orb->misc |= ORB_SET_SPEED(scsi_id->speed_code);
1739 command_orb->misc |= ORB_SET_NOTIFY(1); /* Notify us when complete */
1740
1741 /*
1742 * Get the direction of the transfer. If the direction is unknown, then use our
1743 * goofy table as a back-up.
1744 */
1745 switch (dma_dir) {
1746 case DMA_NONE:
1747 orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
1748 break;
1749 case DMA_TO_DEVICE:
1750 orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA;
1751 break;
1752 case DMA_FROM_DEVICE:
1753 orb_direction = ORB_DIRECTION_READ_FROM_MEDIA;
1754 break;
1755 case DMA_BIDIRECTIONAL:
1756 default:
1757 SBP2_ERR("SCSI data transfer direction not specified. "
1758 "Update the SBP2 direction table in sbp2.h if "
1759 "necessary for your application");
1760 __scsi_print_command(scsi_cmd);
1761 orb_direction = sbp2scsi_direction_table[*scsi_cmd];
1762 break;
1763 }
1764
1765 /*
1766 * Set-up our pagetable stuff... unfortunately, this has become
1767 * messier than I'd like. Need to clean this up a bit. ;-)
1768 */
1769 if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) {
1770
1771 SBP2_DEBUG("No data transfer");
1772
1773 /*
1774 * Handle no data transfer
1775 */
1776 command_orb->data_descriptor_hi = 0x0;
1777 command_orb->data_descriptor_lo = 0x0;
1778 command_orb->misc |= ORB_SET_DIRECTION(1);
1779
1780 } else if (scsi_use_sg) {
1781
1782 SBP2_DEBUG("Use scatter/gather");
1783
1784 /*
1785 * Special case if only one element (and less than 64KB in size)
1786 */
1787 if ((scsi_use_sg == 1) && (sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) {
1788
1789 SBP2_DEBUG("Only one s/g element");
1790 command->dma_dir = dma_dir;
1791 command->dma_size = sgpnt[0].length;
1792 command->dma_type = CMD_DMA_PAGE;
1793 command->cmd_dma = pci_map_page(hi->host->pdev,
1794 sgpnt[0].page,
1795 sgpnt[0].offset,
1796 command->dma_size,
1797 command->dma_dir);
1798 SBP2_DMA_ALLOC("single page scatter element");
1799
1800 command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1801 command_orb->data_descriptor_lo = command->cmd_dma;
1802 command_orb->misc |= ORB_SET_DATA_SIZE(command->dma_size);
1803 command_orb->misc |= ORB_SET_DIRECTION(orb_direction);
1804
1805 } else {
1806 int count = pci_map_sg(hi->host->pdev, sgpnt, scsi_use_sg, dma_dir);
1807 SBP2_DMA_ALLOC("scatter list");
1808
1809 command->dma_size = scsi_use_sg;
1810 command->dma_dir = dma_dir;
1811 command->sge_buffer = sgpnt;
1812
1813 /* use page tables (s/g) */
1814 command_orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1815 command_orb->misc |= ORB_SET_DIRECTION(orb_direction);
1816 command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1817 command_orb->data_descriptor_lo = command->sge_dma;
1818
1819 /*
1820 * Loop through and fill out our sbp-2 page tables
1821 * (and split up anything too large)
1822 */
1823 for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) {
1824 sg_len = sg_dma_len(sgpnt);
1825 sg_addr = sg_dma_address(sgpnt);
1826 while (sg_len) {
1827 scatter_gather_element[sg_count].segment_base_lo = sg_addr;
1828 if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
1829 scatter_gather_element[sg_count].length_segment_base_hi =
1830 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
1831 sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
1832 sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
1833 } else {
1834 scatter_gather_element[sg_count].length_segment_base_hi =
1835 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
1836 sg_len = 0;
1837 }
1838 sg_count++;
1839 }
1840 }
1841
1842 /* Number of page table (s/g) elements */
1843 command_orb->misc |= ORB_SET_DATA_SIZE(sg_count);
1844
1845 sbp2util_packet_dump(scatter_gather_element,
1846 (sizeof(struct sbp2_unrestricted_page_table)) * sg_count,
1847 "sbp2 s/g list", command->sge_dma);
1848
1849 /*
1850 * Byte swap page tables if necessary
1851 */
1852 sbp2util_cpu_to_be32_buffer(scatter_gather_element,
1853 (sizeof(struct sbp2_unrestricted_page_table)) *
1854 sg_count);
1855
1856 }
1857
1858 } else {
1859
1860 SBP2_DEBUG("No scatter/gather");
1861
1862 command->dma_dir = dma_dir;
1863 command->dma_size = scsi_request_bufflen;
1864 command->dma_type = CMD_DMA_SINGLE;
1865 command->cmd_dma = pci_map_single (hi->host->pdev, scsi_request_buffer,
1866 command->dma_size,
1867 command->dma_dir);
1868 SBP2_DMA_ALLOC("single bulk");
1869
1870 /*
1871 * Handle case where we get a command w/o s/g enabled (but
1872 * check for transfers larger than 64K)
1873 */
1874 if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) {
1875
1876 command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1877 command_orb->data_descriptor_lo = command->cmd_dma;
1878 command_orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen);
1879 command_orb->misc |= ORB_SET_DIRECTION(orb_direction);
1880
1881 /*
1882 * Sanity, in case our direction table is not
1883 * up-to-date
1884 */
1885 if (!scsi_request_bufflen) {
1886 command_orb->data_descriptor_hi = 0x0;
1887 command_orb->data_descriptor_lo = 0x0;
1888 command_orb->misc |= ORB_SET_DIRECTION(1);
1889 }
1890
1891 } else {
1892 /*
1893 * Need to turn this into page tables, since the
1894 * buffer is too large.
1895 */
1896 command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1897 command_orb->data_descriptor_lo = command->sge_dma;
1898
1899 /* Use page tables (s/g) */
1900 command_orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1901 command_orb->misc |= ORB_SET_DIRECTION(orb_direction);
1902
1903 /*
1904 * fill out our sbp-2 page tables (and split up
1905 * the large buffer)
1906 */
1907 sg_count = 0;
1908 sg_len = scsi_request_bufflen;
1909 sg_addr = command->cmd_dma;
1910 while (sg_len) {
1911 scatter_gather_element[sg_count].segment_base_lo = sg_addr;
1912 if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
1913 scatter_gather_element[sg_count].length_segment_base_hi =
1914 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
1915 sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
1916 sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
1917 } else {
1918 scatter_gather_element[sg_count].length_segment_base_hi =
1919 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
1920 sg_len = 0;
1921 }
1922 sg_count++;
1923 }
1924
1925 /* Number of page table (s/g) elements */
1926 command_orb->misc |= ORB_SET_DATA_SIZE(sg_count);
1927
1928 sbp2util_packet_dump(scatter_gather_element,
1929 (sizeof(struct sbp2_unrestricted_page_table)) * sg_count,
1930 "sbp2 s/g list", command->sge_dma);
1931
1932 /*
1933 * Byte swap page tables if necessary
1934 */
1935 sbp2util_cpu_to_be32_buffer(scatter_gather_element,
1936 (sizeof(struct sbp2_unrestricted_page_table)) *
1937 sg_count);
1938
1939 }
1940
1941 }
1942
1943 /*
1944 * Byte swap command ORB if necessary
1945 */
1946 sbp2util_cpu_to_be32_buffer(command_orb, sizeof(struct sbp2_command_orb));
1947
1948 /*
1949 * Put our scsi command in the command ORB
1950 */
1951 memset(command_orb->cdb, 0, 12);
1952 memcpy(command_orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd));
1953
1954 return(0);
1955}
1956
1957/*
1958 * This function is called in order to begin a regular SBP-2 command.
1959 */
1960static int sbp2_link_orb_command(struct scsi_id_instance_data *scsi_id,
1961 struct sbp2_command_info *command)
1962{
1963 struct sbp2scsi_host_info *hi = scsi_id->hi;
1964 struct sbp2_command_orb *command_orb = &command->command_orb;
1965 struct node_entry *ne = scsi_id->ne;
1966 u64 addr;
1967
1968 outstanding_orb_incr;
1969 SBP2_ORB_DEBUG("sending command orb %p, total orbs = %x",
1970 command_orb, global_outstanding_command_orbs);
1971
1972 pci_dma_sync_single_for_device(hi->host->pdev, command->command_orb_dma,
1973 sizeof(struct sbp2_command_orb),
1974 PCI_DMA_BIDIRECTIONAL);
1975 pci_dma_sync_single_for_device(hi->host->pdev, command->sge_dma,
1976 sizeof(command->scatter_gather_element),
1977 PCI_DMA_BIDIRECTIONAL);
1978 /*
1979 * Check to see if there are any previous orbs to use
1980 */
1981 if (scsi_id->last_orb == NULL) {
1982 quadlet_t data[2];
1983
1984 /*
1985 * Ok, let's write to the target's management agent register
1986 */
1987 addr = scsi_id->sbp2_command_block_agent_addr + SBP2_ORB_POINTER_OFFSET;
1988 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1989 data[1] = command->command_orb_dma;
1990 sbp2util_cpu_to_be32_buffer(data, 8);
1991
1992 SBP2_ORB_DEBUG("write command agent, command orb %p", command_orb);
1993
1994 if (sbp2util_node_write_no_wait(ne, addr, data, 8) < 0) {
1995 SBP2_ERR("sbp2util_node_write_no_wait failed.\n");
1996 return -EIO;
1997 }
1998
1999 SBP2_ORB_DEBUG("write command agent complete");
2000
2001 scsi_id->last_orb = command_orb;
2002 scsi_id->last_orb_dma = command->command_orb_dma;
2003
2004 } else {
2005 quadlet_t data;
2006
2007 /*
2008 * We have an orb already sent (maybe or maybe not
2009 * processed) that we can append this orb to. So do so,
2010 * and ring the doorbell. Have to be very careful
2011 * modifying these next orb pointers, as they are accessed
2012 * both by the sbp2 device and us.
2013 */
2014 scsi_id->last_orb->next_ORB_lo =
2015 cpu_to_be32(command->command_orb_dma);
2016 /* Tells hardware that this pointer is valid */
2017 scsi_id->last_orb->next_ORB_hi = 0x0;
2018 pci_dma_sync_single_for_device(hi->host->pdev, scsi_id->last_orb_dma,
2019 sizeof(struct sbp2_command_orb),
2020 PCI_DMA_BIDIRECTIONAL);
2021
2022 /*
2023 * Ring the doorbell
2024 */
2025 data = cpu_to_be32(command->command_orb_dma);
2026 addr = scsi_id->sbp2_command_block_agent_addr + SBP2_DOORBELL_OFFSET;
2027
2028 SBP2_ORB_DEBUG("ring doorbell, command orb %p", command_orb);
2029
2030 if (sbp2util_node_write_no_wait(ne, addr, &data, 4) < 0) {
2031 SBP2_ERR("sbp2util_node_write_no_wait failed");
2032 return(-EIO);
2033 }
2034
2035 scsi_id->last_orb = command_orb;
2036 scsi_id->last_orb_dma = command->command_orb_dma;
2037
2038 }
2039 return(0);
2040}
2041
2042/*
2043 * This function is called in order to begin a regular SBP-2 command.
2044 */
2045static int sbp2_send_command(struct scsi_id_instance_data *scsi_id,
2046 struct scsi_cmnd *SCpnt,
2047 void (*done)(struct scsi_cmnd *))
2048{
2049 unchar *cmd = (unchar *) SCpnt->cmnd;
2050 unsigned int request_bufflen = SCpnt->request_bufflen;
2051 struct sbp2_command_info *command;
2052
2053 SBP2_DEBUG("sbp2_send_command");
2054#if (CONFIG_IEEE1394_SBP2_DEBUG >= 2) || defined(CONFIG_IEEE1394_SBP2_PACKET_DUMP)
2055 printk("[scsi command]\n ");
2056 scsi_print_command(SCpnt);
2057#endif
2058 SBP2_DEBUG("SCSI transfer size = %x", request_bufflen);
2059 SBP2_DEBUG("SCSI s/g elements = %x", (unsigned int)SCpnt->use_sg);
2060
2061 /*
2062 * Allocate a command orb and s/g structure
2063 */
2064 command = sbp2util_allocate_command_orb(scsi_id, SCpnt, done);
2065 if (!command) {
2066 return(-EIO);
2067 }
2068
2069 /*
2070 * The scsi stack sends down a request_bufflen which does not match the
2071 * length field in the scsi cdb. This causes some sbp2 devices to
2072 * reject this inquiry command. Fix the request_bufflen.
2073 */
2074 if (*cmd == INQUIRY) {
2075 if (force_inquiry_hack || scsi_id->workarounds & SBP2_BREAKAGE_INQUIRY_HACK)
2076 request_bufflen = cmd[4] = 0x24;
2077 else
2078 request_bufflen = cmd[4];
2079 }
2080
2081 /*
2082 * Now actually fill in the comamnd orb and sbp2 s/g list
2083 */
2084 sbp2_create_command_orb(scsi_id, command, cmd, SCpnt->use_sg,
2085 request_bufflen, SCpnt->request_buffer,
2086 SCpnt->sc_data_direction);
2087 /*
2088 * Update our cdb if necessary (to handle sbp2 RBC command set
2089 * differences). This is where the command set hacks go! =)
2090 */
2091 sbp2_check_sbp2_command(scsi_id, command->command_orb.cdb);
2092
2093 sbp2util_packet_dump(&command->command_orb, sizeof(struct sbp2_command_orb),
2094 "sbp2 command orb", command->command_orb_dma);
2095
2096 /*
2097 * Initialize status fifo
2098 */
2099 memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
2100
2101 /*
2102 * Link up the orb, and ring the doorbell if needed
2103 */
2104 sbp2_link_orb_command(scsi_id, command);
2105
2106 return(0);
2107}
2108
2109
2110/*
2111 * This function deals with command set differences between Linux scsi
2112 * command set and sbp2 RBC command set.
2113 */
2114static void sbp2_check_sbp2_command(struct scsi_id_instance_data *scsi_id, unchar *cmd)
2115{
Ben Collins1934b8b2005-07-09 20:01:23 -04002116 unchar new_cmd[16];
2117 u8 device_type = SBP2_DEVICE_TYPE (scsi_id->sbp2_device_type_and_lun);
2118
2119 SBP2_DEBUG("sbp2_check_sbp2_command");
2120
2121 switch (*cmd) {
2122
2123 case READ_6:
2124
2125 if (sbp2_command_conversion_device_type(device_type)) {
2126
2127 SBP2_DEBUG("Convert READ_6 to READ_10");
2128
2129 /*
2130 * Need to turn read_6 into read_10
2131 */
2132 new_cmd[0] = 0x28;
2133 new_cmd[1] = (cmd[1] & 0xe0);
2134 new_cmd[2] = 0x0;
2135 new_cmd[3] = (cmd[1] & 0x1f);
2136 new_cmd[4] = cmd[2];
2137 new_cmd[5] = cmd[3];
2138 new_cmd[6] = 0x0;
2139 new_cmd[7] = 0x0;
2140 new_cmd[8] = cmd[4];
2141 new_cmd[9] = cmd[5];
2142
2143 memcpy(cmd, new_cmd, 10);
2144
2145 }
2146
2147 break;
2148
2149 case WRITE_6:
2150
2151 if (sbp2_command_conversion_device_type(device_type)) {
2152
2153 SBP2_DEBUG("Convert WRITE_6 to WRITE_10");
2154
2155 /*
2156 * Need to turn write_6 into write_10
2157 */
2158 new_cmd[0] = 0x2a;
2159 new_cmd[1] = (cmd[1] & 0xe0);
2160 new_cmd[2] = 0x0;
2161 new_cmd[3] = (cmd[1] & 0x1f);
2162 new_cmd[4] = cmd[2];
2163 new_cmd[5] = cmd[3];
2164 new_cmd[6] = 0x0;
2165 new_cmd[7] = 0x0;
2166 new_cmd[8] = cmd[4];
2167 new_cmd[9] = cmd[5];
2168
2169 memcpy(cmd, new_cmd, 10);
2170
2171 }
2172
2173 break;
2174
2175 case MODE_SENSE:
2176
2177 if (sbp2_command_conversion_device_type(device_type)) {
2178
2179 SBP2_DEBUG("Convert MODE_SENSE_6 to MODE_SENSE_10");
2180
2181 /*
2182 * Need to turn mode_sense_6 into mode_sense_10
2183 */
2184 new_cmd[0] = 0x5a;
2185 new_cmd[1] = cmd[1];
2186 new_cmd[2] = cmd[2];
2187 new_cmd[3] = 0x0;
2188 new_cmd[4] = 0x0;
2189 new_cmd[5] = 0x0;
2190 new_cmd[6] = 0x0;
2191 new_cmd[7] = 0x0;
2192 new_cmd[8] = cmd[4];
2193 new_cmd[9] = cmd[5];
2194
2195 memcpy(cmd, new_cmd, 10);
2196
2197 }
2198
2199 break;
2200
2201 case MODE_SELECT:
2202
2203 /*
2204 * TODO. Probably need to change mode select to 10 byte version
2205 */
2206
2207 default:
2208 break;
2209 }
2210
2211 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002212}
2213
2214/*
2215 * Translates SBP-2 status into SCSI sense data for check conditions
2216 */
2217static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, unchar *sense_data)
2218{
2219 SBP2_DEBUG("sbp2_status_to_sense_data");
2220
2221 /*
2222 * Ok, it's pretty ugly... ;-)
2223 */
2224 sense_data[0] = 0x70;
2225 sense_data[1] = 0x0;
2226 sense_data[2] = sbp2_status[9];
2227 sense_data[3] = sbp2_status[12];
2228 sense_data[4] = sbp2_status[13];
2229 sense_data[5] = sbp2_status[14];
2230 sense_data[6] = sbp2_status[15];
2231 sense_data[7] = 10;
2232 sense_data[8] = sbp2_status[16];
2233 sense_data[9] = sbp2_status[17];
2234 sense_data[10] = sbp2_status[18];
2235 sense_data[11] = sbp2_status[19];
2236 sense_data[12] = sbp2_status[10];
2237 sense_data[13] = sbp2_status[11];
2238 sense_data[14] = sbp2_status[20];
2239 sense_data[15] = sbp2_status[21];
2240
2241 return(sbp2_status[8] & 0x3f); /* return scsi status */
2242}
2243
2244/*
2245 * This function is called after a command is completed, in order to do any necessary SBP-2
2246 * response data translations for the SCSI stack
2247 */
2248static void sbp2_check_sbp2_response(struct scsi_id_instance_data *scsi_id,
2249 struct scsi_cmnd *SCpnt)
2250{
2251 u8 *scsi_buf = SCpnt->request_buffer;
Ben Collins1934b8b2005-07-09 20:01:23 -04002252 u8 device_type = SBP2_DEVICE_TYPE (scsi_id->sbp2_device_type_and_lun);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002253
2254 SBP2_DEBUG("sbp2_check_sbp2_response");
2255
2256 switch (SCpnt->cmnd[0]) {
2257
2258 case INQUIRY:
2259
2260 /*
2261 * If scsi_id->sbp2_device_type_and_lun is uninitialized, then fill
2262 * this information in from the inquiry response data. Lun is set to zero.
2263 */
2264 if (scsi_id->sbp2_device_type_and_lun == SBP2_DEVICE_TYPE_LUN_UNINITIALIZED) {
2265 SBP2_DEBUG("Creating sbp2_device_type_and_lun from scsi inquiry data");
2266 scsi_id->sbp2_device_type_and_lun = (scsi_buf[0] & 0x1f) << 16;
2267 }
2268
2269 /*
2270 * Make sure data length is ok. Minimum length is 36 bytes
2271 */
2272 if (scsi_buf[4] == 0) {
2273 scsi_buf[4] = 36 - 5;
2274 }
2275
2276 /*
Ben Collins1934b8b2005-07-09 20:01:23 -04002277 * Check for Simple Direct Access Device and change it to TYPE_DISK
2278 */
2279 if ((scsi_buf[0] & 0x1f) == TYPE_RBC) {
2280 SBP2_DEBUG("Changing TYPE_RBC to TYPE_DISK");
2281 scsi_buf[0] &= 0xe0;
2282 }
2283
2284 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002285 * Fix ansi revision and response data format
2286 */
2287 scsi_buf[2] |= 2;
2288 scsi_buf[3] = (scsi_buf[3] & 0xf0) | 2;
2289
2290 break;
2291
Ben Collins1934b8b2005-07-09 20:01:23 -04002292 case MODE_SENSE:
2293
2294 if (sbp2_command_conversion_device_type(device_type)) {
2295
2296 SBP2_DEBUG("Modify mode sense response (10 byte version)");
2297
2298 scsi_buf[0] = scsi_buf[1]; /* Mode data length */
2299 scsi_buf[1] = scsi_buf[2]; /* Medium type */
2300 scsi_buf[2] = scsi_buf[3]; /* Device specific parameter */
2301 scsi_buf[3] = scsi_buf[7]; /* Block descriptor length */
2302 memcpy(scsi_buf + 4, scsi_buf + 8, scsi_buf[0]);
2303 }
2304
2305 break;
2306
2307 case MODE_SELECT:
2308
2309 /*
2310 * TODO. Probably need to change mode select to 10 byte version
2311 */
2312
Linus Torvalds1da177e2005-04-16 15:20:36 -07002313 default:
2314 break;
2315 }
2316 return;
2317}
2318
2319/*
2320 * This function deals with status writes from the SBP-2 device
2321 */
2322static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, int destid,
2323 quadlet_t *data, u64 addr, size_t length, u16 fl)
2324{
2325 struct sbp2scsi_host_info *hi;
2326 struct scsi_id_instance_data *scsi_id = NULL, *scsi_id_tmp;
2327 u32 id;
2328 struct scsi_cmnd *SCpnt = NULL;
2329 u32 scsi_status = SBP2_SCSI_STATUS_GOOD;
2330 struct sbp2_command_info *command;
2331
2332 SBP2_DEBUG("sbp2_handle_status_write");
2333
2334 sbp2util_packet_dump(data, length, "sbp2 status write by device", (u32)addr);
2335
2336 if (!host) {
2337 SBP2_ERR("host is NULL - this is bad!");
2338 return(RCODE_ADDRESS_ERROR);
2339 }
2340
2341 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
2342
2343 if (!hi) {
2344 SBP2_ERR("host info is NULL - this is bad!");
2345 return(RCODE_ADDRESS_ERROR);
2346 }
2347
2348 /*
2349 * Find our scsi_id structure by looking at the status fifo address written to by
2350 * the sbp2 device.
2351 */
2352 id = SBP2_STATUS_FIFO_OFFSET_TO_ENTRY((u32)(addr - SBP2_STATUS_FIFO_ADDRESS));
2353 list_for_each_entry(scsi_id_tmp, &hi->scsi_ids, scsi_list) {
2354 if (scsi_id_tmp->ne->nodeid == nodeid && scsi_id_tmp->ud->id == id) {
2355 scsi_id = scsi_id_tmp;
2356 break;
2357 }
2358 }
2359
2360 if (!scsi_id) {
2361 SBP2_ERR("scsi_id is NULL - device is gone?");
2362 return(RCODE_ADDRESS_ERROR);
2363 }
2364
2365 /*
2366 * Put response into scsi_id status fifo...
2367 */
2368 memcpy(&scsi_id->status_block, data, length);
2369
2370 /*
2371 * Byte swap first two quadlets (8 bytes) of status for processing
2372 */
2373 sbp2util_be32_to_cpu_buffer(&scsi_id->status_block, 8);
2374
2375 /*
2376 * Handle command ORB status here if necessary. First, need to match status with command.
2377 */
2378 command = sbp2util_find_command_for_orb(scsi_id, scsi_id->status_block.ORB_offset_lo);
2379 if (command) {
2380
2381 SBP2_DEBUG("Found status for command ORB");
2382 pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma,
2383 sizeof(struct sbp2_command_orb),
2384 PCI_DMA_BIDIRECTIONAL);
2385 pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma,
2386 sizeof(command->scatter_gather_element),
2387 PCI_DMA_BIDIRECTIONAL);
2388
2389 SBP2_ORB_DEBUG("matched command orb %p", &command->command_orb);
2390 outstanding_orb_decr;
2391
2392 /*
2393 * Matched status with command, now grab scsi command pointers and check status
2394 */
2395 SCpnt = command->Current_SCpnt;
2396 sbp2util_mark_command_completed(scsi_id, command);
2397
2398 if (SCpnt) {
2399
2400 /*
2401 * See if the target stored any scsi status information
2402 */
2403 if (STATUS_GET_LENGTH(scsi_id->status_block.ORB_offset_hi_misc) > 1) {
2404 /*
2405 * Translate SBP-2 status to SCSI sense data
2406 */
2407 SBP2_DEBUG("CHECK CONDITION");
2408 scsi_status = sbp2_status_to_sense_data((unchar *)&scsi_id->status_block, SCpnt->sense_buffer);
2409 }
2410
2411 /*
2412 * Check to see if the dead bit is set. If so, we'll have to initiate
2413 * a fetch agent reset.
2414 */
2415 if (STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc)) {
2416
2417 /*
2418 * Initiate a fetch agent reset.
2419 */
2420 SBP2_DEBUG("Dead bit set - initiating fetch agent reset");
2421 sbp2_agent_reset(scsi_id, 0);
2422 }
2423
2424 SBP2_ORB_DEBUG("completing command orb %p", &command->command_orb);
2425 }
2426
2427 /*
2428 * Check here to see if there are no commands in-use. If there are none, we can
2429 * null out last orb so that next time around we write directly to the orb pointer...
2430 * Quick start saves one 1394 bus transaction.
2431 */
2432 if (list_empty(&scsi_id->sbp2_command_orb_inuse)) {
2433 scsi_id->last_orb = NULL;
2434 }
2435
2436 } else {
2437
2438 /*
2439 * It's probably a login/logout/reconnect status.
2440 */
2441 if ((scsi_id->login_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
2442 (scsi_id->query_logins_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
2443 (scsi_id->reconnect_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
2444 (scsi_id->logout_orb_dma == scsi_id->status_block.ORB_offset_lo)) {
2445 atomic_set(&scsi_id->sbp2_login_complete, 1);
2446 }
2447 }
2448
2449 if (SCpnt) {
2450
2451 /* Complete the SCSI command. */
2452 SBP2_DEBUG("Completing SCSI command");
2453 sbp2scsi_complete_command(scsi_id, scsi_status, SCpnt,
2454 command->Current_done);
2455 SBP2_ORB_DEBUG("command orb completed");
2456 }
2457
2458 return(RCODE_COMPLETE);
2459}
2460
2461
2462/**************************************
2463 * SCSI interface related section
2464 **************************************/
2465
2466/*
2467 * This routine is the main request entry routine for doing I/O. It is
2468 * called from the scsi stack directly.
2469 */
2470static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt,
2471 void (*done)(struct scsi_cmnd *))
2472{
2473 struct scsi_id_instance_data *scsi_id =
2474 (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
2475 struct sbp2scsi_host_info *hi;
2476
2477 SBP2_DEBUG("sbp2scsi_queuecommand");
2478
2479 /*
2480 * If scsi_id is null, it means there is no device in this slot,
2481 * so we should return selection timeout.
2482 */
2483 if (!scsi_id) {
2484 SCpnt->result = DID_NO_CONNECT << 16;
2485 done (SCpnt);
2486 return 0;
2487 }
2488
2489 hi = scsi_id->hi;
2490
2491 if (!hi) {
2492 SBP2_ERR("sbp2scsi_host_info is NULL - this is bad!");
2493 SCpnt->result = DID_NO_CONNECT << 16;
2494 done (SCpnt);
2495 return(0);
2496 }
2497
2498 /*
2499 * Until we handle multiple luns, just return selection time-out
2500 * to any IO directed at non-zero LUNs
2501 */
2502 if (SCpnt->device->lun) {
2503 SCpnt->result = DID_NO_CONNECT << 16;
2504 done (SCpnt);
2505 return(0);
2506 }
2507
2508 /*
2509 * Check for request sense command, and handle it here
2510 * (autorequest sense)
2511 */
2512 if (SCpnt->cmnd[0] == REQUEST_SENSE) {
2513 SBP2_DEBUG("REQUEST_SENSE");
2514 memcpy(SCpnt->request_buffer, SCpnt->sense_buffer, SCpnt->request_bufflen);
2515 memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer));
2516 sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_GOOD, SCpnt, done);
2517 return(0);
2518 }
2519
2520 /*
2521 * Check to see if we are in the middle of a bus reset.
2522 */
2523 if (!hpsb_node_entry_valid(scsi_id->ne)) {
2524 SBP2_ERR("Bus reset in progress - rejecting command");
2525 SCpnt->result = DID_BUS_BUSY << 16;
2526 done (SCpnt);
2527 return(0);
2528 }
2529
2530 /*
2531 * Try and send our SCSI command
2532 */
2533 if (sbp2_send_command(scsi_id, SCpnt, done)) {
2534 SBP2_ERR("Error sending SCSI command");
2535 sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_SELECTION_TIMEOUT,
2536 SCpnt, done);
2537 }
2538
2539 return(0);
2540}
2541
2542/*
2543 * This function is called in order to complete all outstanding SBP-2
2544 * commands (in case of resets, etc.).
2545 */
2546static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id,
2547 u32 status)
2548{
2549 struct sbp2scsi_host_info *hi = scsi_id->hi;
2550 struct list_head *lh;
2551 struct sbp2_command_info *command;
2552
2553 SBP2_DEBUG("sbp2scsi_complete_all_commands");
2554
2555 while (!list_empty(&scsi_id->sbp2_command_orb_inuse)) {
2556 SBP2_DEBUG("Found pending command to complete");
2557 lh = scsi_id->sbp2_command_orb_inuse.next;
2558 command = list_entry(lh, struct sbp2_command_info, list);
2559 pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma,
2560 sizeof(struct sbp2_command_orb),
2561 PCI_DMA_BIDIRECTIONAL);
2562 pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma,
2563 sizeof(command->scatter_gather_element),
2564 PCI_DMA_BIDIRECTIONAL);
2565 sbp2util_mark_command_completed(scsi_id, command);
2566 if (command->Current_SCpnt) {
2567 command->Current_SCpnt->result = status << 16;
2568 command->Current_done(command->Current_SCpnt);
2569 }
2570 }
2571
2572 return;
2573}
2574
2575/*
2576 * This function is called in order to complete a regular SBP-2 command.
2577 *
2578 * This can be called in interrupt context.
2579 */
2580static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id,
2581 u32 scsi_status, struct scsi_cmnd *SCpnt,
2582 void (*done)(struct scsi_cmnd *))
2583{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002584 SBP2_DEBUG("sbp2scsi_complete_command");
2585
2586 /*
2587 * Sanity
2588 */
2589 if (!SCpnt) {
2590 SBP2_ERR("SCpnt is NULL");
2591 return;
2592 }
2593
2594 /*
2595 * If a bus reset is in progress and there was an error, don't
2596 * complete the command, just let it get retried at the end of the
2597 * bus reset.
2598 */
2599 if (!hpsb_node_entry_valid(scsi_id->ne) && (scsi_status != SBP2_SCSI_STATUS_GOOD)) {
2600 SBP2_ERR("Bus reset in progress - retry command later");
2601 return;
2602 }
2603
2604 /*
2605 * Switch on scsi status
2606 */
2607 switch (scsi_status) {
2608 case SBP2_SCSI_STATUS_GOOD:
2609 SCpnt->result = DID_OK;
2610 break;
2611
2612 case SBP2_SCSI_STATUS_BUSY:
2613 SBP2_ERR("SBP2_SCSI_STATUS_BUSY");
2614 SCpnt->result = DID_BUS_BUSY << 16;
2615 break;
2616
2617 case SBP2_SCSI_STATUS_CHECK_CONDITION:
2618 SBP2_DEBUG("SBP2_SCSI_STATUS_CHECK_CONDITION");
2619 SCpnt->result = CHECK_CONDITION << 1;
2620
2621 /*
2622 * Debug stuff
2623 */
2624#if CONFIG_IEEE1394_SBP2_DEBUG >= 1
2625 scsi_print_command(SCpnt);
2626 scsi_print_sense("bh", SCpnt);
2627#endif
2628
2629 break;
2630
2631 case SBP2_SCSI_STATUS_SELECTION_TIMEOUT:
2632 SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT");
2633 SCpnt->result = DID_NO_CONNECT << 16;
2634 scsi_print_command(SCpnt);
2635 break;
2636
2637 case SBP2_SCSI_STATUS_CONDITION_MET:
2638 case SBP2_SCSI_STATUS_RESERVATION_CONFLICT:
2639 case SBP2_SCSI_STATUS_COMMAND_TERMINATED:
2640 SBP2_ERR("Bad SCSI status = %x", scsi_status);
2641 SCpnt->result = DID_ERROR << 16;
2642 scsi_print_command(SCpnt);
2643 break;
2644
2645 default:
2646 SBP2_ERR("Unsupported SCSI status = %x", scsi_status);
2647 SCpnt->result = DID_ERROR << 16;
2648 }
2649
2650 /*
2651 * Take care of any sbp2 response data mucking here (RBC stuff, etc.)
2652 */
2653 if (SCpnt->result == DID_OK) {
2654 sbp2_check_sbp2_response(scsi_id, SCpnt);
2655 }
2656
2657 /*
2658 * If a bus reset is in progress and there was an error, complete
2659 * the command as busy so that it will get retried.
2660 */
2661 if (!hpsb_node_entry_valid(scsi_id->ne) && (scsi_status != SBP2_SCSI_STATUS_GOOD)) {
2662 SBP2_ERR("Completing command with busy (bus reset)");
2663 SCpnt->result = DID_BUS_BUSY << 16;
2664 }
2665
2666 /*
2667 * If a unit attention occurs, return busy status so it gets
2668 * retried... it could have happened because of a 1394 bus reset
2669 * or hot-plug...
2670 */
2671#if 0
2672 if ((scsi_status == SBP2_SCSI_STATUS_CHECK_CONDITION) &&
2673 (SCpnt->sense_buffer[2] == UNIT_ATTENTION)) {
2674 SBP2_DEBUG("UNIT ATTENTION - return busy");
2675 SCpnt->result = DID_BUS_BUSY << 16;
2676 }
2677#endif
2678
2679 /*
2680 * Tell scsi stack that we're done with this command
2681 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002682 done (SCpnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002683}
2684
2685
2686static int sbp2scsi_slave_configure (struct scsi_device *sdev)
2687{
2688 blk_queue_dma_alignment(sdev->request_queue, (512 - 1));
Ben Collins1934b8b2005-07-09 20:01:23 -04002689
Linus Torvalds1da177e2005-04-16 15:20:36 -07002690 return 0;
2691}
2692
2693
2694/*
2695 * Called by scsi stack when something has really gone wrong. Usually
2696 * called when a command has timed-out for some reason.
2697 */
2698static int sbp2scsi_abort(struct scsi_cmnd *SCpnt)
2699{
2700 struct scsi_id_instance_data *scsi_id =
2701 (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
2702 struct sbp2scsi_host_info *hi = scsi_id->hi;
2703 struct sbp2_command_info *command;
2704
2705 SBP2_ERR("aborting sbp2 command");
2706 scsi_print_command(SCpnt);
2707
2708 if (scsi_id) {
2709
2710 /*
2711 * Right now, just return any matching command structures
2712 * to the free pool.
2713 */
2714 command = sbp2util_find_command_for_SCpnt(scsi_id, SCpnt);
2715 if (command) {
2716 SBP2_DEBUG("Found command to abort");
2717 pci_dma_sync_single_for_cpu(hi->host->pdev,
2718 command->command_orb_dma,
2719 sizeof(struct sbp2_command_orb),
2720 PCI_DMA_BIDIRECTIONAL);
2721 pci_dma_sync_single_for_cpu(hi->host->pdev,
2722 command->sge_dma,
2723 sizeof(command->scatter_gather_element),
2724 PCI_DMA_BIDIRECTIONAL);
2725 sbp2util_mark_command_completed(scsi_id, command);
2726 if (command->Current_SCpnt) {
2727 command->Current_SCpnt->result = DID_ABORT << 16;
2728 command->Current_done(command->Current_SCpnt);
2729 }
2730 }
2731
2732 /*
2733 * Initiate a fetch agent reset.
2734 */
2735 sbp2_agent_reset(scsi_id, 0);
2736 sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY);
2737 }
2738
2739 return(SUCCESS);
2740}
2741
2742/*
2743 * Called by scsi stack when something has really gone wrong.
2744 */
Jeff Garzik 94d0e7b82005-05-28 07:55:48 -04002745static int __sbp2scsi_reset(struct scsi_cmnd *SCpnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002746{
2747 struct scsi_id_instance_data *scsi_id =
2748 (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
2749
2750 SBP2_ERR("reset requested");
2751
2752 if (scsi_id) {
2753 SBP2_ERR("Generating sbp2 fetch agent reset");
2754 sbp2_agent_reset(scsi_id, 0);
2755 }
2756
2757 return(SUCCESS);
2758}
2759
Jeff Garzik 94d0e7b82005-05-28 07:55:48 -04002760static int sbp2scsi_reset(struct scsi_cmnd *SCpnt)
2761{
2762 unsigned long flags;
2763 int rc;
2764
2765 spin_lock_irqsave(SCpnt->device->host->host_lock, flags);
2766 rc = __sbp2scsi_reset(SCpnt);
2767 spin_unlock_irqrestore(SCpnt->device->host->host_lock, flags);
2768
2769 return rc;
2770}
2771
Linus Torvalds1da177e2005-04-16 15:20:36 -07002772static const char *sbp2scsi_info (struct Scsi_Host *host)
2773{
2774 return "SCSI emulation for IEEE-1394 SBP-2 Devices";
2775}
2776
Yani Ioannoue404e272005-05-17 06:42:58 -04002777static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev, struct device_attribute *attr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002778{
2779 struct scsi_device *sdev;
2780 struct scsi_id_instance_data *scsi_id;
2781 int lun;
2782
2783 if (!(sdev = to_scsi_device(dev)))
2784 return 0;
2785
2786 if (!(scsi_id = (struct scsi_id_instance_data *)sdev->host->hostdata[0]))
2787 return 0;
2788
2789 if (scsi_id->sbp2_device_type_and_lun == SBP2_DEVICE_TYPE_LUN_UNINITIALIZED)
2790 lun = 0;
2791 else
2792 lun = ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun);
2793
2794 return sprintf(buf, "%016Lx:%d:%d\n", (unsigned long long)scsi_id->ne->guid,
2795 scsi_id->ud->id, lun);
2796}
2797static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL);
2798
2799static struct device_attribute *sbp2_sysfs_sdev_attrs[] = {
2800 &dev_attr_ieee1394_id,
2801 NULL
2802};
2803
2804MODULE_AUTHOR("Ben Collins <bcollins@debian.org>");
2805MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver");
2806MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME);
2807MODULE_LICENSE("GPL");
2808
2809/* SCSI host template */
2810static struct scsi_host_template scsi_driver_template = {
2811 .module = THIS_MODULE,
2812 .name = "SBP-2 IEEE-1394",
2813 .proc_name = SBP2_DEVICE_NAME,
2814 .info = sbp2scsi_info,
2815 .queuecommand = sbp2scsi_queuecommand,
2816 .eh_abort_handler = sbp2scsi_abort,
2817 .eh_device_reset_handler = sbp2scsi_reset,
2818 .eh_bus_reset_handler = sbp2scsi_reset,
2819 .eh_host_reset_handler = sbp2scsi_reset,
2820 .slave_configure = sbp2scsi_slave_configure,
2821 .this_id = -1,
2822 .sg_tablesize = SG_ALL,
2823 .use_clustering = ENABLE_CLUSTERING,
2824 .cmd_per_lun = SBP2_MAX_CMDS,
2825 .can_queue = SBP2_MAX_CMDS,
2826 .emulated = 1,
2827 .sdev_attrs = sbp2_sysfs_sdev_attrs,
2828};
2829
2830static int sbp2_module_init(void)
2831{
2832 int ret;
2833
2834 SBP2_DEBUG("sbp2_module_init");
2835
2836 printk(KERN_INFO "sbp2: %s\n", version);
2837
2838 /* Module load debug option to force one command at a time (serializing I/O) */
2839 if (serialize_io) {
2840 SBP2_ERR("Driver forced to serialize I/O (serialize_io = 1)");
2841 scsi_driver_template.can_queue = 1;
2842 scsi_driver_template.cmd_per_lun = 1;
2843 }
2844
2845 /* Set max sectors (module load option). Default is 255 sectors. */
2846 scsi_driver_template.max_sectors = max_sectors;
2847
2848
2849 /* Register our high level driver with 1394 stack */
2850 hpsb_register_highlevel(&sbp2_highlevel);
2851
2852 ret = hpsb_register_protocol(&sbp2_driver);
2853 if (ret) {
2854 SBP2_ERR("Failed to register protocol");
2855 hpsb_unregister_highlevel(&sbp2_highlevel);
2856 return ret;
2857 }
2858
2859 return 0;
2860}
2861
2862static void __exit sbp2_module_exit(void)
2863{
2864 SBP2_DEBUG("sbp2_module_exit");
2865
2866 hpsb_unregister_protocol(&sbp2_driver);
2867
2868 hpsb_unregister_highlevel(&sbp2_highlevel);
2869}
2870
2871module_init(sbp2_module_init);
2872module_exit(sbp2_module_exit);