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-rw-r--r--drivers/ieee1394/sbp2.c2864
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diff --git a/drivers/ieee1394/sbp2.c b/drivers/ieee1394/sbp2.c
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index 000000000000..00c7b958361a
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1/*
2 * sbp2.c - SBP-2 protocol driver for IEEE-1394
3 *
4 * Copyright (C) 2000 James Goodwin, Filanet Corporation (www.filanet.com)
5 * jamesg@filanet.com (JSG)
6 *
7 * Copyright (C) 2003 Ben Collins <bcollins@debian.org>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software Foundation,
21 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 */
23
24/*
25 * Brief Description:
26 *
27 * This driver implements the Serial Bus Protocol 2 (SBP-2) over IEEE-1394
28 * under Linux. The SBP-2 driver is implemented as an IEEE-1394 high-level
29 * driver. It also registers as a SCSI lower-level driver in order to accept
30 * SCSI commands for transport using SBP-2.
31 *
32 * You may access any attached SBP-2 storage devices as if they were SCSI
33 * devices (e.g. mount /dev/sda1, fdisk, mkfs, etc.).
34 *
35 * Current Issues:
36 *
37 * - Error Handling: SCSI aborts and bus reset requests are handled somewhat
38 * but the code needs additional debugging.
39 */
40
41#include <linux/config.h>
42#include <linux/kernel.h>
43#include <linux/list.h>
44#include <linux/string.h>
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 =
84 "$Rev: 1219 $ Ben Collins <bcollins@debian.org>";
85
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 */
107static int serialize_io = 0;
108module_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 */
148static int force_inquiry_hack = 0;
149module_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
172/* #define CONFIG_IEEE1394_SBP2_DEBUG_ORBS */
173/* #define CONFIG_IEEE1394_SBP2_DEBUG_DMA */
174/* #define CONFIG_IEEE1394_SBP2_DEBUG 1 */
175/* #define CONFIG_IEEE1394_SBP2_DEBUG 2 */
176/* #define CONFIG_IEEE1394_SBP2_PACKET_DUMP */
177
178#ifdef CONFIG_IEEE1394_SBP2_DEBUG_ORBS
179#define SBP2_ORB_DEBUG(fmt, args...) HPSB_ERR("sbp2(%s): "fmt, __FUNCTION__, ## args)
180static u32 global_outstanding_command_orbs = 0;
181#define outstanding_orb_incr global_outstanding_command_orbs++
182#define outstanding_orb_decr global_outstanding_command_orbs--
183#else
184#define SBP2_ORB_DEBUG(fmt, args...)
185#define outstanding_orb_incr
186#define outstanding_orb_decr
187#endif
188
189#ifdef CONFIG_IEEE1394_SBP2_DEBUG_DMA
190#define SBP2_DMA_ALLOC(fmt, args...) \
191 HPSB_ERR("sbp2(%s)alloc(%d): "fmt, __FUNCTION__, \
192 ++global_outstanding_dmas, ## args)
193#define SBP2_DMA_FREE(fmt, args...) \
194 HPSB_ERR("sbp2(%s)free(%d): "fmt, __FUNCTION__, \
195 --global_outstanding_dmas, ## args)
196static u32 global_outstanding_dmas = 0;
197#else
198#define SBP2_DMA_ALLOC(fmt, args...)
199#define SBP2_DMA_FREE(fmt, args...)
200#endif
201
202#if CONFIG_IEEE1394_SBP2_DEBUG >= 2
203#define SBP2_DEBUG(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
204#define SBP2_INFO(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
205#define SBP2_NOTICE(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
206#define SBP2_WARN(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
207#elif CONFIG_IEEE1394_SBP2_DEBUG == 1
208#define SBP2_DEBUG(fmt, args...) HPSB_DEBUG("sbp2: "fmt, ## args)
209#define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
210#define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args)
211#define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args)
212#else
213#define SBP2_DEBUG(fmt, args...)
214#define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
215#define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args)
216#define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args)
217#endif
218
219#define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
220
221
222/*
223 * Globals
224 */
225
226static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id,
227 u32 status);
228
229static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id,
230 u32 scsi_status, struct scsi_cmnd *SCpnt,
231 void (*done)(struct scsi_cmnd *));
232
233static struct scsi_host_template scsi_driver_template;
234
235static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC };
236
237static void sbp2_host_reset(struct hpsb_host *host);
238
239static int sbp2_probe(struct device *dev);
240static int sbp2_remove(struct device *dev);
241static int sbp2_update(struct unit_directory *ud);
242
243static struct hpsb_highlevel sbp2_highlevel = {
244 .name = SBP2_DEVICE_NAME,
245 .host_reset = sbp2_host_reset,
246};
247
248static struct hpsb_address_ops sbp2_ops = {
249 .write = sbp2_handle_status_write
250};
251
252#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
253static struct hpsb_address_ops sbp2_physdma_ops = {
254 .read = sbp2_handle_physdma_read,
255 .write = sbp2_handle_physdma_write,
256};
257#endif
258
259static struct hpsb_protocol_driver sbp2_driver = {
260 .name = "SBP2 Driver",
261 .id_table = sbp2_id_table,
262 .update = sbp2_update,
263 .driver = {
264 .name = SBP2_DEVICE_NAME,
265 .bus = &ieee1394_bus_type,
266 .probe = sbp2_probe,
267 .remove = sbp2_remove,
268 },
269};
270
271
272/* List of device firmware's that require a forced 36 byte inquiry. */
273static u32 sbp2_broken_inquiry_list[] = {
274 0x00002800, /* Stefan Richter <richtest@bauwesen.tu-cottbus.de> */
275 /* DViCO Momobay CX-1 */
276 0x00000200 /* Andreas Plesch <plesch@fas.harvard.edu> */
277 /* QPS Fire DVDBurner */
278};
279
280#define NUM_BROKEN_INQUIRY_DEVS \
281 (sizeof(sbp2_broken_inquiry_list)/sizeof(*sbp2_broken_inquiry_list))
282
283/**************************************
284 * General utility functions
285 **************************************/
286
287
288#ifndef __BIG_ENDIAN
289/*
290 * Converts a buffer from be32 to cpu byte ordering. Length is in bytes.
291 */
292static __inline__ void sbp2util_be32_to_cpu_buffer(void *buffer, int length)
293{
294 u32 *temp = buffer;
295
296 for (length = (length >> 2); length--; )
297 temp[length] = be32_to_cpu(temp[length]);
298
299 return;
300}
301
302/*
303 * Converts a buffer from cpu to be32 byte ordering. Length is in bytes.
304 */
305static __inline__ void sbp2util_cpu_to_be32_buffer(void *buffer, int length)
306{
307 u32 *temp = buffer;
308
309 for (length = (length >> 2); length--; )
310 temp[length] = cpu_to_be32(temp[length]);
311
312 return;
313}
314#else /* BIG_ENDIAN */
315/* Why waste the cpu cycles? */
316#define sbp2util_be32_to_cpu_buffer(x,y)
317#define sbp2util_cpu_to_be32_buffer(x,y)
318#endif
319
320#ifdef CONFIG_IEEE1394_SBP2_PACKET_DUMP
321/*
322 * Debug packet dump routine. Length is in bytes.
323 */
324static void sbp2util_packet_dump(void *buffer, int length, char *dump_name, u32 dump_phys_addr)
325{
326 int i;
327 unsigned char *dump = buffer;
328
329 if (!dump || !length || !dump_name)
330 return;
331
332 if (dump_phys_addr)
333 printk("[%s, 0x%x]", dump_name, dump_phys_addr);
334 else
335 printk("[%s]", dump_name);
336 for (i = 0; i < length; i++) {
337 if (i > 0x3f) {
338 printk("\n ...");
339 break;
340 }
341 if ((i & 0x3) == 0)
342 printk(" ");
343 if ((i & 0xf) == 0)
344 printk("\n ");
345 printk("%02x ", (int) dump[i]);
346 }
347 printk("\n");
348
349 return;
350}
351#else
352#define sbp2util_packet_dump(w,x,y,z)
353#endif
354
355/*
356 * Goofy routine that basically does a down_timeout function.
357 */
358static int sbp2util_down_timeout(atomic_t *done, int timeout)
359{
360 int i;
361
362 for (i = timeout; (i > 0 && atomic_read(done) == 0); i-= HZ/10) {
363 if (msleep_interruptible(100)) /* 100ms */
364 return(1);
365 }
366 return ((i > 0) ? 0:1);
367}
368
369/* Free's an allocated packet */
370static void sbp2_free_packet(struct hpsb_packet *packet)
371{
372 hpsb_free_tlabel(packet);
373 hpsb_free_packet(packet);
374}
375
376/* This is much like hpsb_node_write(), except it ignores the response
377 * subaction and returns immediately. Can be used from interrupts.
378 */
379static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr,
380 quadlet_t *buffer, size_t length)
381{
382 struct hpsb_packet *packet;
383
384 packet = hpsb_make_writepacket(ne->host, ne->nodeid,
385 addr, buffer, length);
386 if (!packet)
387 return -ENOMEM;
388
389 hpsb_set_packet_complete_task(packet, (void (*)(void*))sbp2_free_packet,
390 packet);
391
392 hpsb_node_fill_packet(ne, packet);
393
394 if (hpsb_send_packet(packet) < 0) {
395 sbp2_free_packet(packet);
396 return -EIO;
397 }
398
399 return 0;
400}
401
402/*
403 * This function is called to create a pool of command orbs used for
404 * command processing. It is called when a new sbp2 device is detected.
405 */
406static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data *scsi_id)
407{
408 struct sbp2scsi_host_info *hi = scsi_id->hi;
409 int i;
410 unsigned long flags, orbs;
411 struct sbp2_command_info *command;
412
413 orbs = serialize_io ? 2 : SBP2_MAX_CMDS;
414
415 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
416 for (i = 0; i < orbs; i++) {
417 command = (struct sbp2_command_info *)
418 kmalloc(sizeof(struct sbp2_command_info), GFP_ATOMIC);
419 if (!command) {
420 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
421 return(-ENOMEM);
422 }
423 memset(command, '\0', sizeof(struct sbp2_command_info));
424 command->command_orb_dma =
425 pci_map_single (hi->host->pdev, &command->command_orb,
426 sizeof(struct sbp2_command_orb),
427 PCI_DMA_BIDIRECTIONAL);
428 SBP2_DMA_ALLOC("single command orb DMA");
429 command->sge_dma =
430 pci_map_single (hi->host->pdev, &command->scatter_gather_element,
431 sizeof(command->scatter_gather_element),
432 PCI_DMA_BIDIRECTIONAL);
433 SBP2_DMA_ALLOC("scatter_gather_element");
434 INIT_LIST_HEAD(&command->list);
435 list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed);
436 }
437 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
438 return 0;
439}
440
441/*
442 * This function is called to delete a pool of command orbs.
443 */
444static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data *scsi_id)
445{
446 struct hpsb_host *host = scsi_id->hi->host;
447 struct list_head *lh, *next;
448 struct sbp2_command_info *command;
449 unsigned long flags;
450
451 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
452 if (!list_empty(&scsi_id->sbp2_command_orb_completed)) {
453 list_for_each_safe(lh, next, &scsi_id->sbp2_command_orb_completed) {
454 command = list_entry(lh, struct sbp2_command_info, list);
455
456 /* Release our generic DMA's */
457 pci_unmap_single(host->pdev, command->command_orb_dma,
458 sizeof(struct sbp2_command_orb),
459 PCI_DMA_BIDIRECTIONAL);
460 SBP2_DMA_FREE("single command orb DMA");
461 pci_unmap_single(host->pdev, command->sge_dma,
462 sizeof(command->scatter_gather_element),
463 PCI_DMA_BIDIRECTIONAL);
464 SBP2_DMA_FREE("scatter_gather_element");
465
466 kfree(command);
467 }
468 }
469 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
470 return;
471}
472
473/*
474 * This function finds the sbp2_command for a given outstanding command
475 * orb.Only looks at the inuse list.
476 */
477static struct sbp2_command_info *sbp2util_find_command_for_orb(
478 struct scsi_id_instance_data *scsi_id, dma_addr_t orb)
479{
480 struct sbp2_command_info *command;
481 unsigned long flags;
482
483 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
484 if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) {
485 list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) {
486 if (command->command_orb_dma == orb) {
487 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
488 return (command);
489 }
490 }
491 }
492 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
493
494 SBP2_ORB_DEBUG("could not match command orb %x", (unsigned int)orb);
495
496 return(NULL);
497}
498
499/*
500 * This function finds the sbp2_command for a given outstanding SCpnt.
501 * Only looks at the inuse list.
502 */
503static struct sbp2_command_info *sbp2util_find_command_for_SCpnt(struct scsi_id_instance_data *scsi_id, void *SCpnt)
504{
505 struct sbp2_command_info *command;
506 unsigned long flags;
507
508 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
509 if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) {
510 list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) {
511 if (command->Current_SCpnt == SCpnt) {
512 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
513 return (command);
514 }
515 }
516 }
517 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
518 return(NULL);
519}
520
521/*
522 * This function allocates a command orb used to send a scsi command.
523 */
524static struct sbp2_command_info *sbp2util_allocate_command_orb(
525 struct scsi_id_instance_data *scsi_id,
526 struct scsi_cmnd *Current_SCpnt,
527 void (*Current_done)(struct scsi_cmnd *))
528{
529 struct list_head *lh;
530 struct sbp2_command_info *command = NULL;
531 unsigned long flags;
532
533 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
534 if (!list_empty(&scsi_id->sbp2_command_orb_completed)) {
535 lh = scsi_id->sbp2_command_orb_completed.next;
536 list_del(lh);
537 command = list_entry(lh, struct sbp2_command_info, list);
538 command->Current_done = Current_done;
539 command->Current_SCpnt = Current_SCpnt;
540 list_add_tail(&command->list, &scsi_id->sbp2_command_orb_inuse);
541 } else {
542 SBP2_ERR("sbp2util_allocate_command_orb - No orbs available!");
543 }
544 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
545 return (command);
546}
547
548/* Free our DMA's */
549static void sbp2util_free_command_dma(struct sbp2_command_info *command)
550{
551 struct scsi_id_instance_data *scsi_id =
552 (struct scsi_id_instance_data *)command->Current_SCpnt->device->host->hostdata[0];
553 struct hpsb_host *host;
554
555 if (!scsi_id) {
556 printk(KERN_ERR "%s: scsi_id == NULL\n", __FUNCTION__);
557 return;
558 }
559
560 host = scsi_id->ud->ne->host;
561
562 if (command->cmd_dma) {
563 if (command->dma_type == CMD_DMA_SINGLE) {
564 pci_unmap_single(host->pdev, command->cmd_dma,
565 command->dma_size, command->dma_dir);
566 SBP2_DMA_FREE("single bulk");
567 } else if (command->dma_type == CMD_DMA_PAGE) {
568 pci_unmap_page(host->pdev, command->cmd_dma,
569 command->dma_size, command->dma_dir);
570 SBP2_DMA_FREE("single page");
571 } /* XXX: Check for CMD_DMA_NONE bug */
572 command->dma_type = CMD_DMA_NONE;
573 command->cmd_dma = 0;
574 }
575
576 if (command->sge_buffer) {
577 pci_unmap_sg(host->pdev, command->sge_buffer,
578 command->dma_size, command->dma_dir);
579 SBP2_DMA_FREE("scatter list");
580 command->sge_buffer = NULL;
581 }
582}
583
584/*
585 * This function moves a command to the completed orb list.
586 */
587static void sbp2util_mark_command_completed(struct scsi_id_instance_data *scsi_id, struct sbp2_command_info *command)
588{
589 unsigned long flags;
590
591 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
592 list_del(&command->list);
593 sbp2util_free_command_dma(command);
594 list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed);
595 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
596}
597
598
599
600/*********************************************
601 * IEEE-1394 core driver stack related section
602 *********************************************/
603static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud);
604
605static int sbp2_probe(struct device *dev)
606{
607 struct unit_directory *ud;
608 struct scsi_id_instance_data *scsi_id;
609
610 SBP2_DEBUG("sbp2_probe");
611
612 ud = container_of(dev, struct unit_directory, device);
613
614 /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s)
615 * instead. */
616 if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY)
617 return -ENODEV;
618
619 scsi_id = sbp2_alloc_device(ud);
620
621 if (!scsi_id)
622 return -ENOMEM;
623
624 sbp2_parse_unit_directory(scsi_id, ud);
625
626 return sbp2_start_device(scsi_id);
627}
628
629static int sbp2_remove(struct device *dev)
630{
631 struct unit_directory *ud;
632 struct scsi_id_instance_data *scsi_id;
633
634 SBP2_DEBUG("sbp2_remove");
635
636 ud = container_of(dev, struct unit_directory, device);
637 scsi_id = ud->device.driver_data;
638
639 sbp2_logout_device(scsi_id);
640 sbp2_remove_device(scsi_id);
641
642 return 0;
643}
644
645static int sbp2_update(struct unit_directory *ud)
646{
647 struct scsi_id_instance_data *scsi_id = ud->device.driver_data;
648
649 SBP2_DEBUG("sbp2_update");
650
651 if (sbp2_reconnect_device(scsi_id)) {
652
653 /*
654 * Ok, reconnect has failed. Perhaps we didn't
655 * reconnect fast enough. Try doing a regular login, but
656 * first do a logout just in case of any weirdness.
657 */
658 sbp2_logout_device(scsi_id);
659
660 if (sbp2_login_device(scsi_id)) {
661 /* Login failed too, just fail, and the backend
662 * will call our sbp2_remove for us */
663 SBP2_ERR("Failed to reconnect to sbp2 device!");
664 return -EBUSY;
665 }
666 }
667
668 /* Set max retries to something large on the device. */
669 sbp2_set_busy_timeout(scsi_id);
670
671 /* Do a SBP-2 fetch agent reset. */
672 sbp2_agent_reset(scsi_id, 1);
673
674 /* Get the max speed and packet size that we can use. */
675 sbp2_max_speed_and_size(scsi_id);
676
677 /* Complete any pending commands with busy (so they get
678 * retried) and remove them from our queue
679 */
680 sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY);
681
682 /* Make sure we unblock requests (since this is likely after a bus
683 * reset). */
684 scsi_unblock_requests(scsi_id->scsi_host);
685
686 return 0;
687}
688
689/* This functions is called by the sbp2_probe, for each new device. We now
690 * allocate one scsi host for each scsi_id (unit directory). */
691static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud)
692{
693 struct sbp2scsi_host_info *hi;
694 struct Scsi_Host *scsi_host = NULL;
695 struct scsi_id_instance_data *scsi_id = NULL;
696
697 SBP2_DEBUG("sbp2_alloc_device");
698
699 scsi_id = kmalloc(sizeof(*scsi_id), GFP_KERNEL);
700 if (!scsi_id) {
701 SBP2_ERR("failed to create scsi_id");
702 goto failed_alloc;
703 }
704 memset(scsi_id, 0, sizeof(*scsi_id));
705
706 scsi_id->ne = ud->ne;
707 scsi_id->ud = ud;
708 scsi_id->speed_code = IEEE1394_SPEED_100;
709 scsi_id->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100];
710 atomic_set(&scsi_id->sbp2_login_complete, 0);
711 INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_inuse);
712 INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_completed);
713 INIT_LIST_HEAD(&scsi_id->scsi_list);
714 spin_lock_init(&scsi_id->sbp2_command_orb_lock);
715 scsi_id->sbp2_device_type_and_lun = SBP2_DEVICE_TYPE_LUN_UNINITIALIZED;
716
717 ud->device.driver_data = scsi_id;
718
719 hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host);
720 if (!hi) {
721 hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host, sizeof(*hi));
722 if (!hi) {
723 SBP2_ERR("failed to allocate hostinfo");
724 goto failed_alloc;
725 }
726 SBP2_DEBUG("sbp2_alloc_device: allocated hostinfo");
727 hi->host = ud->ne->host;
728 INIT_LIST_HEAD(&hi->scsi_ids);
729
730 /* Register our sbp2 status address space... */
731 hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, &sbp2_ops,
732 SBP2_STATUS_FIFO_ADDRESS,
733 SBP2_STATUS_FIFO_ADDRESS +
734 SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(SBP2_MAX_UDS_PER_NODE+1));
735#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
736 /* Handle data movement if physical dma is not
737 * enabled/supportedon host controller */
738 hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, &sbp2_physdma_ops,
739 0x0ULL, 0xfffffffcULL);
740#endif
741 }
742
743 scsi_id->hi = hi;
744
745 list_add_tail(&scsi_id->scsi_list, &hi->scsi_ids);
746
747 /* Register our host with the SCSI stack. */
748 scsi_host = scsi_host_alloc(&scsi_driver_template, 0);
749 if (!scsi_host) {
750 SBP2_ERR("failed to register scsi host");
751 goto failed_alloc;
752 }
753
754 scsi_host->hostdata[0] = (unsigned long)scsi_id;
755
756 if (!scsi_add_host(scsi_host, &ud->device)) {
757 scsi_id->scsi_host = scsi_host;
758 return scsi_id;
759 }
760
761 SBP2_ERR("failed to add scsi host");
762 scsi_host_put(scsi_host);
763
764failed_alloc:
765 sbp2_remove_device(scsi_id);
766 return NULL;
767}
768
769
770static void sbp2_host_reset(struct hpsb_host *host)
771{
772 struct sbp2scsi_host_info *hi;
773 struct scsi_id_instance_data *scsi_id;
774
775 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
776
777 if (hi) {
778 list_for_each_entry(scsi_id, &hi->scsi_ids, scsi_list)
779 scsi_block_requests(scsi_id->scsi_host);
780 }
781}
782
783
784/*
785 * This function is where we first pull the node unique ids, and then
786 * allocate memory and register a SBP-2 device.
787 */
788static int sbp2_start_device(struct scsi_id_instance_data *scsi_id)
789{
790 struct sbp2scsi_host_info *hi = scsi_id->hi;
791 struct scsi_device *sdev;
792
793 SBP2_DEBUG("sbp2_start_device");
794
795 /* Login FIFO DMA */
796 scsi_id->login_response =
797 pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_login_response),
798 &scsi_id->login_response_dma);
799 if (!scsi_id->login_response)
800 goto alloc_fail;
801 SBP2_DMA_ALLOC("consistent DMA region for login FIFO");
802
803 /* Query logins ORB DMA */
804 scsi_id->query_logins_orb =
805 pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_query_logins_orb),
806 &scsi_id->query_logins_orb_dma);
807 if (!scsi_id->query_logins_orb)
808 goto alloc_fail;
809 SBP2_DMA_ALLOC("consistent DMA region for query logins ORB");
810
811 /* Query logins response DMA */
812 scsi_id->query_logins_response =
813 pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_query_logins_response),
814 &scsi_id->query_logins_response_dma);
815 if (!scsi_id->query_logins_response)
816 goto alloc_fail;
817 SBP2_DMA_ALLOC("consistent DMA region for query logins response");
818
819 /* Reconnect ORB DMA */
820 scsi_id->reconnect_orb =
821 pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_reconnect_orb),
822 &scsi_id->reconnect_orb_dma);
823 if (!scsi_id->reconnect_orb)
824 goto alloc_fail;
825 SBP2_DMA_ALLOC("consistent DMA region for reconnect ORB");
826
827 /* Logout ORB DMA */
828 scsi_id->logout_orb =
829 pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_logout_orb),
830 &scsi_id->logout_orb_dma);
831 if (!scsi_id->logout_orb)
832 goto alloc_fail;
833 SBP2_DMA_ALLOC("consistent DMA region for logout ORB");
834
835 /* Login ORB DMA */
836 scsi_id->login_orb =
837 pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_login_orb),
838 &scsi_id->login_orb_dma);
839 if (!scsi_id->login_orb) {
840alloc_fail:
841 if (scsi_id->query_logins_response) {
842 pci_free_consistent(hi->host->pdev,
843 sizeof(struct sbp2_query_logins_response),
844 scsi_id->query_logins_response,
845 scsi_id->query_logins_response_dma);
846 SBP2_DMA_FREE("query logins response DMA");
847 }
848
849 if (scsi_id->query_logins_orb) {
850 pci_free_consistent(hi->host->pdev,
851 sizeof(struct sbp2_query_logins_orb),
852 scsi_id->query_logins_orb,
853 scsi_id->query_logins_orb_dma);
854 SBP2_DMA_FREE("query logins ORB DMA");
855 }
856
857 if (scsi_id->logout_orb) {
858 pci_free_consistent(hi->host->pdev,
859 sizeof(struct sbp2_logout_orb),
860 scsi_id->logout_orb,
861 scsi_id->logout_orb_dma);
862 SBP2_DMA_FREE("logout ORB DMA");
863 }
864
865 if (scsi_id->reconnect_orb) {
866 pci_free_consistent(hi->host->pdev,
867 sizeof(struct sbp2_reconnect_orb),
868 scsi_id->reconnect_orb,
869 scsi_id->reconnect_orb_dma);
870 SBP2_DMA_FREE("reconnect ORB DMA");
871 }
872
873 if (scsi_id->login_response) {
874 pci_free_consistent(hi->host->pdev,
875 sizeof(struct sbp2_login_response),
876 scsi_id->login_response,
877 scsi_id->login_response_dma);
878 SBP2_DMA_FREE("login FIFO DMA");
879 }
880
881 list_del(&scsi_id->scsi_list);
882
883 kfree(scsi_id);
884
885 SBP2_ERR ("Could not allocate memory for scsi_id");
886
887 return -ENOMEM;
888 }
889 SBP2_DMA_ALLOC("consistent DMA region for login ORB");
890
891 SBP2_DEBUG("New SBP-2 device inserted, SCSI ID = %x", scsi_id->ud->id);
892
893 /*
894 * Create our command orb pool
895 */
896 if (sbp2util_create_command_orb_pool(scsi_id)) {
897 SBP2_ERR("sbp2util_create_command_orb_pool failed!");
898 sbp2_remove_device(scsi_id);
899 return -ENOMEM;
900 }
901
902 /* Schedule a timeout here. The reason is that we may be so close
903 * to a bus reset, that the device is not available for logins.
904 * This can happen when the bus reset is caused by the host
905 * connected to the sbp2 device being removed. That host would
906 * have a certain amount of time to relogin before the sbp2 device
907 * allows someone else to login instead. One second makes sense. */
908 msleep_interruptible(1000);
909 if (signal_pending(current)) {
910 SBP2_WARN("aborting sbp2_start_device due to event");
911 sbp2_remove_device(scsi_id);
912 return -EINTR;
913 }
914
915 /*
916 * Login to the sbp-2 device
917 */
918 if (sbp2_login_device(scsi_id)) {
919 /* Login failed, just remove the device. */
920 sbp2_remove_device(scsi_id);
921 return -EBUSY;
922 }
923
924 /*
925 * Set max retries to something large on the device
926 */
927 sbp2_set_busy_timeout(scsi_id);
928
929 /*
930 * Do a SBP-2 fetch agent reset
931 */
932 sbp2_agent_reset(scsi_id, 1);
933
934 /*
935 * Get the max speed and packet size that we can use
936 */
937 sbp2_max_speed_and_size(scsi_id);
938
939 /* Add this device to the scsi layer now */
940 sdev = scsi_add_device(scsi_id->scsi_host, 0, scsi_id->ud->id, 0);
941 if (IS_ERR(sdev)) {
942 SBP2_ERR("scsi_add_device failed");
943 return PTR_ERR(sdev);
944 }
945
946 return 0;
947}
948
949/*
950 * This function removes an sbp2 device from the sbp2scsi_host_info struct.
951 */
952static void sbp2_remove_device(struct scsi_id_instance_data *scsi_id)
953{
954 struct sbp2scsi_host_info *hi;
955
956 SBP2_DEBUG("sbp2_remove_device");
957
958 if (!scsi_id)
959 return;
960
961 hi = scsi_id->hi;
962
963 /* This will remove our scsi device aswell */
964 if (scsi_id->scsi_host) {
965 scsi_remove_host(scsi_id->scsi_host);
966 scsi_host_put(scsi_id->scsi_host);
967 }
968
969 sbp2util_remove_command_orb_pool(scsi_id);
970
971 list_del(&scsi_id->scsi_list);
972
973 if (scsi_id->login_response) {
974 pci_free_consistent(hi->host->pdev,
975 sizeof(struct sbp2_login_response),
976 scsi_id->login_response,
977 scsi_id->login_response_dma);
978 SBP2_DMA_FREE("single login FIFO");
979 }
980
981 if (scsi_id->login_orb) {
982 pci_free_consistent(hi->host->pdev,
983 sizeof(struct sbp2_login_orb),
984 scsi_id->login_orb,
985 scsi_id->login_orb_dma);
986 SBP2_DMA_FREE("single login ORB");
987 }
988
989 if (scsi_id->reconnect_orb) {
990 pci_free_consistent(hi->host->pdev,
991 sizeof(struct sbp2_reconnect_orb),
992 scsi_id->reconnect_orb,
993 scsi_id->reconnect_orb_dma);
994 SBP2_DMA_FREE("single reconnect orb");
995 }
996
997 if (scsi_id->logout_orb) {
998 pci_free_consistent(hi->host->pdev,
999 sizeof(struct sbp2_logout_orb),
1000 scsi_id->logout_orb,
1001 scsi_id->logout_orb_dma);
1002 SBP2_DMA_FREE("single logout orb");
1003 }
1004
1005 if (scsi_id->query_logins_orb) {
1006 pci_free_consistent(hi->host->pdev,
1007 sizeof(struct sbp2_query_logins_orb),
1008 scsi_id->query_logins_orb,
1009 scsi_id->query_logins_orb_dma);
1010 SBP2_DMA_FREE("single query logins orb");
1011 }
1012
1013 if (scsi_id->query_logins_response) {
1014 pci_free_consistent(hi->host->pdev,
1015 sizeof(struct sbp2_query_logins_response),
1016 scsi_id->query_logins_response,
1017 scsi_id->query_logins_response_dma);
1018 SBP2_DMA_FREE("single query logins data");
1019 }
1020
1021 scsi_id->ud->device.driver_data = NULL;
1022
1023 SBP2_DEBUG("SBP-2 device removed, SCSI ID = %d", scsi_id->ud->id);
1024
1025 kfree(scsi_id);
1026}
1027
1028#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
1029/*
1030 * This function deals with physical dma write requests (for adapters that do not support
1031 * physical dma in hardware). Mostly just here for debugging...
1032 */
1033static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid, int destid, quadlet_t *data,
1034 u64 addr, size_t length, u16 flags)
1035{
1036
1037 /*
1038 * Manually put the data in the right place.
1039 */
1040 memcpy(bus_to_virt((u32)addr), data, length);
1041 sbp2util_packet_dump(data, length, "sbp2 phys dma write by device", (u32)addr);
1042 return(RCODE_COMPLETE);
1043}
1044
1045/*
1046 * This function deals with physical dma read requests (for adapters that do not support
1047 * physical dma in hardware). Mostly just here for debugging...
1048 */
1049static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid, quadlet_t *data,
1050 u64 addr, size_t length, u16 flags)
1051{
1052
1053 /*
1054 * Grab data from memory and send a read response.
1055 */
1056 memcpy(data, bus_to_virt((u32)addr), length);
1057 sbp2util_packet_dump(data, length, "sbp2 phys dma read by device", (u32)addr);
1058 return(RCODE_COMPLETE);
1059}
1060#endif
1061
1062
1063/**************************************
1064 * SBP-2 protocol related section
1065 **************************************/
1066
1067/*
1068 * This function determines if we should convert scsi commands for a particular sbp2 device type
1069 */
1070static __inline__ int sbp2_command_conversion_device_type(u8 device_type)
1071{
1072 return (((device_type == TYPE_DISK) ||
1073 (device_type == TYPE_SDAD) ||
1074 (device_type == TYPE_ROM)) ? 1:0);
1075}
1076
1077/*
1078 * This function queries the device for the maximum concurrent logins it
1079 * supports.
1080 */
1081static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id)
1082{
1083 struct sbp2scsi_host_info *hi = scsi_id->hi;
1084 quadlet_t data[2];
1085 int max_logins;
1086 int active_logins;
1087
1088 SBP2_DEBUG("sbp2_query_logins");
1089
1090 scsi_id->query_logins_orb->reserved1 = 0x0;
1091 scsi_id->query_logins_orb->reserved2 = 0x0;
1092
1093 scsi_id->query_logins_orb->query_response_lo = scsi_id->query_logins_response_dma;
1094 scsi_id->query_logins_orb->query_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
1095 SBP2_DEBUG("sbp2_query_logins: query_response_hi/lo initialized");
1096
1097 scsi_id->query_logins_orb->lun_misc = ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST);
1098 scsi_id->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1);
1099 if (scsi_id->sbp2_device_type_and_lun != SBP2_DEVICE_TYPE_LUN_UNINITIALIZED) {
1100 scsi_id->query_logins_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun);
1101 SBP2_DEBUG("sbp2_query_logins: set lun to %d",
1102 ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun));
1103 }
1104 SBP2_DEBUG("sbp2_query_logins: lun_misc initialized");
1105
1106 scsi_id->query_logins_orb->reserved_resp_length =
1107 ORB_SET_QUERY_LOGINS_RESP_LENGTH(sizeof(struct sbp2_query_logins_response));
1108 SBP2_DEBUG("sbp2_query_logins: reserved_resp_length initialized");
1109
1110 scsi_id->query_logins_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO +
1111 SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id);
1112 scsi_id->query_logins_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) |
1113 SBP2_STATUS_FIFO_ADDRESS_HI);
1114 SBP2_DEBUG("sbp2_query_logins: status FIFO initialized");
1115
1116 sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb));
1117
1118 SBP2_DEBUG("sbp2_query_logins: orb byte-swapped");
1119
1120 sbp2util_packet_dump(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb),
1121 "sbp2 query logins orb", scsi_id->query_logins_orb_dma);
1122
1123 memset(scsi_id->query_logins_response, 0, sizeof(struct sbp2_query_logins_response));
1124 memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
1125
1126 SBP2_DEBUG("sbp2_query_logins: query_logins_response/status FIFO memset");
1127
1128 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1129 data[1] = scsi_id->query_logins_orb_dma;
1130 sbp2util_cpu_to_be32_buffer(data, 8);
1131
1132 atomic_set(&scsi_id->sbp2_login_complete, 0);
1133
1134 SBP2_DEBUG("sbp2_query_logins: prepared to write");
1135 hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8);
1136 SBP2_DEBUG("sbp2_query_logins: written");
1137
1138 if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 2*HZ)) {
1139 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1140 return(-EIO);
1141 }
1142
1143 if (scsi_id->status_block.ORB_offset_lo != scsi_id->query_logins_orb_dma) {
1144 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1145 return(-EIO);
1146 }
1147
1148 if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
1149 STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
1150 STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
1151
1152 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1153 return(-EIO);
1154 }
1155
1156 sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_response, sizeof(struct sbp2_query_logins_response));
1157
1158 SBP2_DEBUG("length_max_logins = %x",
1159 (unsigned int)scsi_id->query_logins_response->length_max_logins);
1160
1161 SBP2_DEBUG("Query logins to SBP-2 device successful");
1162
1163 max_logins = RESPONSE_GET_MAX_LOGINS(scsi_id->query_logins_response->length_max_logins);
1164 SBP2_DEBUG("Maximum concurrent logins supported: %d", max_logins);
1165
1166 active_logins = RESPONSE_GET_ACTIVE_LOGINS(scsi_id->query_logins_response->length_max_logins);
1167 SBP2_DEBUG("Number of active logins: %d", active_logins);
1168
1169 if (active_logins >= max_logins) {
1170 return(-EIO);
1171 }
1172
1173 return 0;
1174}
1175
1176/*
1177 * This function is called in order to login to a particular SBP-2 device,
1178 * after a bus reset.
1179 */
1180static int sbp2_login_device(struct scsi_id_instance_data *scsi_id)
1181{
1182 struct sbp2scsi_host_info *hi = scsi_id->hi;
1183 quadlet_t data[2];
1184
1185 SBP2_DEBUG("sbp2_login_device");
1186
1187 if (!scsi_id->login_orb) {
1188 SBP2_DEBUG("sbp2_login_device: login_orb not alloc'd!");
1189 return(-EIO);
1190 }
1191
1192 if (!exclusive_login) {
1193 if (sbp2_query_logins(scsi_id)) {
1194 SBP2_INFO("Device does not support any more concurrent logins");
1195 return(-EIO);
1196 }
1197 }
1198
1199 /* Set-up login ORB, assume no password */
1200 scsi_id->login_orb->password_hi = 0;
1201 scsi_id->login_orb->password_lo = 0;
1202 SBP2_DEBUG("sbp2_login_device: password_hi/lo initialized");
1203
1204 scsi_id->login_orb->login_response_lo = scsi_id->login_response_dma;
1205 scsi_id->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
1206 SBP2_DEBUG("sbp2_login_device: login_response_hi/lo initialized");
1207
1208 scsi_id->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST);
1209 scsi_id->login_orb->lun_misc |= ORB_SET_RECONNECT(0); /* One second reconnect time */
1210 scsi_id->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(exclusive_login); /* Exclusive access to device */
1211 scsi_id->login_orb->lun_misc |= ORB_SET_NOTIFY(1); /* Notify us of login complete */
1212 /* Set the lun if we were able to pull it from the device's unit directory */
1213 if (scsi_id->sbp2_device_type_and_lun != SBP2_DEVICE_TYPE_LUN_UNINITIALIZED) {
1214 scsi_id->login_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun);
1215 SBP2_DEBUG("sbp2_query_logins: set lun to %d",
1216 ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun));
1217 }
1218 SBP2_DEBUG("sbp2_login_device: lun_misc initialized");
1219
1220 scsi_id->login_orb->passwd_resp_lengths =
1221 ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response));
1222 SBP2_DEBUG("sbp2_login_device: passwd_resp_lengths initialized");
1223
1224 scsi_id->login_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO +
1225 SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id);
1226 scsi_id->login_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) |
1227 SBP2_STATUS_FIFO_ADDRESS_HI);
1228 SBP2_DEBUG("sbp2_login_device: status FIFO initialized");
1229
1230 /*
1231 * Byte swap ORB if necessary
1232 */
1233 sbp2util_cpu_to_be32_buffer(scsi_id->login_orb, sizeof(struct sbp2_login_orb));
1234
1235 SBP2_DEBUG("sbp2_login_device: orb byte-swapped");
1236
1237 sbp2util_packet_dump(scsi_id->login_orb, sizeof(struct sbp2_login_orb),
1238 "sbp2 login orb", scsi_id->login_orb_dma);
1239
1240 /*
1241 * Initialize login response and status fifo
1242 */
1243 memset(scsi_id->login_response, 0, sizeof(struct sbp2_login_response));
1244 memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
1245
1246 SBP2_DEBUG("sbp2_login_device: login_response/status FIFO memset");
1247
1248 /*
1249 * Ok, let's write to the target's management agent register
1250 */
1251 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1252 data[1] = scsi_id->login_orb_dma;
1253 sbp2util_cpu_to_be32_buffer(data, 8);
1254
1255 atomic_set(&scsi_id->sbp2_login_complete, 0);
1256
1257 SBP2_DEBUG("sbp2_login_device: prepared to write to %08x",
1258 (unsigned int)scsi_id->sbp2_management_agent_addr);
1259 hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8);
1260 SBP2_DEBUG("sbp2_login_device: written");
1261
1262 /*
1263 * Wait for login status (up to 20 seconds)...
1264 */
1265 if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 20*HZ)) {
1266 SBP2_ERR("Error logging into SBP-2 device - login timed-out");
1267 return(-EIO);
1268 }
1269
1270 /*
1271 * Sanity. Make sure status returned matches login orb.
1272 */
1273 if (scsi_id->status_block.ORB_offset_lo != scsi_id->login_orb_dma) {
1274 SBP2_ERR("Error logging into SBP-2 device - login timed-out");
1275 return(-EIO);
1276 }
1277
1278 /*
1279 * Check status
1280 */
1281 if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
1282 STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
1283 STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
1284
1285 SBP2_ERR("Error logging into SBP-2 device - login failed");
1286 return(-EIO);
1287 }
1288
1289 /*
1290 * Byte swap the login response, for use when reconnecting or
1291 * logging out.
1292 */
1293 sbp2util_cpu_to_be32_buffer(scsi_id->login_response, sizeof(struct sbp2_login_response));
1294
1295 /*
1296 * Grab our command block agent address from the login response.
1297 */
1298 SBP2_DEBUG("command_block_agent_hi = %x",
1299 (unsigned int)scsi_id->login_response->command_block_agent_hi);
1300 SBP2_DEBUG("command_block_agent_lo = %x",
1301 (unsigned int)scsi_id->login_response->command_block_agent_lo);
1302
1303 scsi_id->sbp2_command_block_agent_addr =
1304 ((u64)scsi_id->login_response->command_block_agent_hi) << 32;
1305 scsi_id->sbp2_command_block_agent_addr |= ((u64)scsi_id->login_response->command_block_agent_lo);
1306 scsi_id->sbp2_command_block_agent_addr &= 0x0000ffffffffffffULL;
1307
1308 SBP2_INFO("Logged into SBP-2 device");
1309
1310 return(0);
1311
1312}
1313
1314/*
1315 * This function is called in order to logout from a particular SBP-2
1316 * device, usually called during driver unload.
1317 */
1318static int sbp2_logout_device(struct scsi_id_instance_data *scsi_id)
1319{
1320 struct sbp2scsi_host_info *hi = scsi_id->hi;
1321 quadlet_t data[2];
1322 int error;
1323
1324 SBP2_DEBUG("sbp2_logout_device");
1325
1326 /*
1327 * Set-up logout ORB
1328 */
1329 scsi_id->logout_orb->reserved1 = 0x0;
1330 scsi_id->logout_orb->reserved2 = 0x0;
1331 scsi_id->logout_orb->reserved3 = 0x0;
1332 scsi_id->logout_orb->reserved4 = 0x0;
1333
1334 scsi_id->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST);
1335 scsi_id->logout_orb->login_ID_misc |= ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID);
1336
1337 /* Notify us when complete */
1338 scsi_id->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1339
1340 scsi_id->logout_orb->reserved5 = 0x0;
1341 scsi_id->logout_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO +
1342 SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id);
1343 scsi_id->logout_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) |
1344 SBP2_STATUS_FIFO_ADDRESS_HI);
1345
1346 /*
1347 * Byte swap ORB if necessary
1348 */
1349 sbp2util_cpu_to_be32_buffer(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb));
1350
1351 sbp2util_packet_dump(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb),
1352 "sbp2 logout orb", scsi_id->logout_orb_dma);
1353
1354 /*
1355 * Ok, let's write to the target's management agent register
1356 */
1357 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1358 data[1] = scsi_id->logout_orb_dma;
1359 sbp2util_cpu_to_be32_buffer(data, 8);
1360
1361 atomic_set(&scsi_id->sbp2_login_complete, 0);
1362
1363 error = hpsb_node_write(scsi_id->ne,
1364 scsi_id->sbp2_management_agent_addr,
1365 data, 8);
1366 if (error)
1367 return error;
1368
1369 /* Wait for device to logout...1 second. */
1370 if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ))
1371 return -EIO;
1372
1373 SBP2_INFO("Logged out of SBP-2 device");
1374
1375 return(0);
1376
1377}
1378
1379/*
1380 * This function is called in order to reconnect to a particular SBP-2
1381 * device, after a bus reset.
1382 */
1383static int sbp2_reconnect_device(struct scsi_id_instance_data *scsi_id)
1384{
1385 struct sbp2scsi_host_info *hi = scsi_id->hi;
1386 quadlet_t data[2];
1387 int error;
1388
1389 SBP2_DEBUG("sbp2_reconnect_device");
1390
1391 /*
1392 * Set-up reconnect ORB
1393 */
1394 scsi_id->reconnect_orb->reserved1 = 0x0;
1395 scsi_id->reconnect_orb->reserved2 = 0x0;
1396 scsi_id->reconnect_orb->reserved3 = 0x0;
1397 scsi_id->reconnect_orb->reserved4 = 0x0;
1398
1399 scsi_id->reconnect_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST);
1400 scsi_id->reconnect_orb->login_ID_misc |=
1401 ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID);
1402
1403 /* Notify us when complete */
1404 scsi_id->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1405
1406 scsi_id->reconnect_orb->reserved5 = 0x0;
1407 scsi_id->reconnect_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO +
1408 SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id);
1409 scsi_id->reconnect_orb->status_FIFO_hi =
1410 (ORB_SET_NODE_ID(hi->host->node_id) | SBP2_STATUS_FIFO_ADDRESS_HI);
1411
1412 /*
1413 * Byte swap ORB if necessary
1414 */
1415 sbp2util_cpu_to_be32_buffer(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb));
1416
1417 sbp2util_packet_dump(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb),
1418 "sbp2 reconnect orb", scsi_id->reconnect_orb_dma);
1419
1420 /*
1421 * Initialize status fifo
1422 */
1423 memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
1424
1425 /*
1426 * Ok, let's write to the target's management agent register
1427 */
1428 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1429 data[1] = scsi_id->reconnect_orb_dma;
1430 sbp2util_cpu_to_be32_buffer(data, 8);
1431
1432 atomic_set(&scsi_id->sbp2_login_complete, 0);
1433
1434 error = hpsb_node_write(scsi_id->ne,
1435 scsi_id->sbp2_management_agent_addr,
1436 data, 8);
1437 if (error)
1438 return error;
1439
1440 /*
1441 * Wait for reconnect status (up to 1 second)...
1442 */
1443 if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ)) {
1444 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out");
1445 return(-EIO);
1446 }
1447
1448 /*
1449 * Sanity. Make sure status returned matches reconnect orb.
1450 */
1451 if (scsi_id->status_block.ORB_offset_lo != scsi_id->reconnect_orb_dma) {
1452 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out");
1453 return(-EIO);
1454 }
1455
1456 /*
1457 * Check status
1458 */
1459 if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
1460 STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
1461 STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
1462
1463 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect failed");
1464 return(-EIO);
1465 }
1466
1467 HPSB_DEBUG("Reconnected to SBP-2 device");
1468
1469 return(0);
1470
1471}
1472
1473/*
1474 * This function is called in order to set the busy timeout (number of
1475 * retries to attempt) on the sbp2 device.
1476 */
1477static int sbp2_set_busy_timeout(struct scsi_id_instance_data *scsi_id)
1478{
1479 quadlet_t data;
1480
1481 SBP2_DEBUG("sbp2_set_busy_timeout");
1482
1483 /*
1484 * Ok, let's write to the target's busy timeout register
1485 */
1486 data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE);
1487
1488 if (hpsb_node_write(scsi_id->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4)) {
1489 SBP2_ERR("sbp2_set_busy_timeout error");
1490 }
1491
1492 return(0);
1493}
1494
1495
1496/*
1497 * This function is called to parse sbp2 device's config rom unit
1498 * directory. Used to determine things like sbp2 management agent offset,
1499 * and command set used (SCSI or RBC).
1500 */
1501static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id,
1502 struct unit_directory *ud)
1503{
1504 struct csr1212_keyval *kv;
1505 struct csr1212_dentry *dentry;
1506 u64 management_agent_addr;
1507 u32 command_set_spec_id, command_set, unit_characteristics,
1508 firmware_revision, workarounds;
1509 int i;
1510
1511 SBP2_DEBUG("sbp2_parse_unit_directory");
1512
1513 management_agent_addr = 0x0;
1514 command_set_spec_id = 0x0;
1515 command_set = 0x0;
1516 unit_characteristics = 0x0;
1517 firmware_revision = 0x0;
1518
1519 /* Handle different fields in the unit directory, based on keys */
1520 csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) {
1521 switch (kv->key.id) {
1522 case CSR1212_KV_ID_DEPENDENT_INFO:
1523 if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET) {
1524 /* Save off the management agent address */
1525 management_agent_addr =
1526 CSR1212_REGISTER_SPACE_BASE +
1527 (kv->value.csr_offset << 2);
1528
1529 SBP2_DEBUG("sbp2_management_agent_addr = %x",
1530 (unsigned int) management_agent_addr);
1531 } else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
1532 scsi_id->sbp2_device_type_and_lun = kv->value.immediate;
1533 }
1534 break;
1535
1536 case SBP2_COMMAND_SET_SPEC_ID_KEY:
1537 /* Command spec organization */
1538 command_set_spec_id = kv->value.immediate;
1539 SBP2_DEBUG("sbp2_command_set_spec_id = %x",
1540 (unsigned int) command_set_spec_id);
1541 break;
1542
1543 case SBP2_COMMAND_SET_KEY:
1544 /* Command set used by sbp2 device */
1545 command_set = kv->value.immediate;
1546 SBP2_DEBUG("sbp2_command_set = %x",
1547 (unsigned int) command_set);
1548 break;
1549
1550 case SBP2_UNIT_CHARACTERISTICS_KEY:
1551 /*
1552 * Unit characterisitcs (orb related stuff
1553 * that I'm not yet paying attention to)
1554 */
1555 unit_characteristics = kv->value.immediate;
1556 SBP2_DEBUG("sbp2_unit_characteristics = %x",
1557 (unsigned int) unit_characteristics);
1558 break;
1559
1560 case SBP2_FIRMWARE_REVISION_KEY:
1561 /* Firmware revision */
1562 firmware_revision = kv->value.immediate;
1563 if (force_inquiry_hack)
1564 SBP2_INFO("sbp2_firmware_revision = %x",
1565 (unsigned int) firmware_revision);
1566 else SBP2_DEBUG("sbp2_firmware_revision = %x",
1567 (unsigned int) firmware_revision);
1568 break;
1569
1570 default:
1571 break;
1572 }
1573 }
1574
1575 /* This is the start of our broken device checking. We try to hack
1576 * around oddities and known defects. */
1577 workarounds = 0x0;
1578
1579 /* If the vendor id is 0xa0b8 (Symbios vendor id), then we have a
1580 * bridge with 128KB max transfer size limitation. For sanity, we
1581 * only voice this when the current max_sectors setting
1582 * exceeds the 128k limit. By default, that is not the case.
1583 *
1584 * It would be really nice if we could detect this before the scsi
1585 * host gets initialized. That way we can down-force the
1586 * max_sectors to account for it. That is not currently
1587 * possible. */
1588 if ((firmware_revision & 0xffff00) ==
1589 SBP2_128KB_BROKEN_FIRMWARE &&
1590 (max_sectors * 512) > (128*1024)) {
1591 SBP2_WARN("Node " NODE_BUS_FMT ": Bridge only supports 128KB max transfer size.",
1592 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid));
1593 SBP2_WARN("WARNING: Current max_sectors setting is larger than 128KB (%d sectors)!",
1594 max_sectors);
1595 workarounds |= SBP2_BREAKAGE_128K_MAX_TRANSFER;
1596 }
1597
1598 /* Check for a blacklisted set of devices that require us to force
1599 * a 36 byte host inquiry. This can be overriden as a module param
1600 * (to force all hosts). */
1601 for (i = 0; i < NUM_BROKEN_INQUIRY_DEVS; i++) {
1602 if ((firmware_revision & 0xffff00) ==
1603 sbp2_broken_inquiry_list[i]) {
1604 SBP2_WARN("Node " NODE_BUS_FMT ": Using 36byte inquiry workaround",
1605 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid));
1606 workarounds |= SBP2_BREAKAGE_INQUIRY_HACK;
1607 break; /* No need to continue. */
1608 }
1609 }
1610
1611 /* If this is a logical unit directory entry, process the parent
1612 * to get the values. */
1613 if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) {
1614 struct unit_directory *parent_ud =
1615 container_of(ud->device.parent, struct unit_directory, device);
1616 sbp2_parse_unit_directory(scsi_id, parent_ud);
1617 } else {
1618 scsi_id->sbp2_management_agent_addr = management_agent_addr;
1619 scsi_id->sbp2_command_set_spec_id = command_set_spec_id;
1620 scsi_id->sbp2_command_set = command_set;
1621 scsi_id->sbp2_unit_characteristics = unit_characteristics;
1622 scsi_id->sbp2_firmware_revision = firmware_revision;
1623 scsi_id->workarounds = workarounds;
1624 if (ud->flags & UNIT_DIRECTORY_HAS_LUN)
1625 scsi_id->sbp2_device_type_and_lun = ud->lun;
1626 }
1627}
1628
1629/*
1630 * This function is called in order to determine the max speed and packet
1631 * size we can use in our ORBs. Note, that we (the driver and host) only
1632 * initiate the transaction. The SBP-2 device actually transfers the data
1633 * (by reading from the DMA area we tell it). This means that the SBP-2
1634 * device decides the actual maximum data it can transfer. We just tell it
1635 * the speed that it needs to use, and the max_rec the host supports, and
1636 * it takes care of the rest.
1637 */
1638static int sbp2_max_speed_and_size(struct scsi_id_instance_data *scsi_id)
1639{
1640 struct sbp2scsi_host_info *hi = scsi_id->hi;
1641
1642 SBP2_DEBUG("sbp2_max_speed_and_size");
1643
1644 /* Initial setting comes from the hosts speed map */
1645 scsi_id->speed_code = hi->host->speed_map[NODEID_TO_NODE(hi->host->node_id) * 64
1646 + NODEID_TO_NODE(scsi_id->ne->nodeid)];
1647
1648 /* Bump down our speed if the user requested it */
1649 if (scsi_id->speed_code > max_speed) {
1650 scsi_id->speed_code = max_speed;
1651 SBP2_ERR("Forcing SBP-2 max speed down to %s",
1652 hpsb_speedto_str[scsi_id->speed_code]);
1653 }
1654
1655 /* Payload size is the lesser of what our speed supports and what
1656 * our host supports. */
1657 scsi_id->max_payload_size = min(sbp2_speedto_max_payload[scsi_id->speed_code],
1658 (u8)(hi->host->csr.max_rec - 1));
1659
1660 HPSB_DEBUG("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]",
1661 NODE_BUS_ARGS(hi->host, scsi_id->ne->nodeid),
1662 hpsb_speedto_str[scsi_id->speed_code],
1663 1 << ((u32)scsi_id->max_payload_size + 2));
1664
1665 return(0);
1666}
1667
1668/*
1669 * This function is called in order to perform a SBP-2 agent reset.
1670 */
1671static int sbp2_agent_reset(struct scsi_id_instance_data *scsi_id, int wait)
1672{
1673 quadlet_t data;
1674 u64 addr;
1675 int retval;
1676
1677 SBP2_DEBUG("sbp2_agent_reset");
1678
1679 /*
1680 * Ok, let's write to the target's management agent register
1681 */
1682 data = ntohl(SBP2_AGENT_RESET_DATA);
1683 addr = scsi_id->sbp2_command_block_agent_addr + SBP2_AGENT_RESET_OFFSET;
1684
1685 if (wait)
1686 retval = hpsb_node_write(scsi_id->ne, addr, &data, 4);
1687 else
1688 retval = sbp2util_node_write_no_wait(scsi_id->ne, addr, &data, 4);
1689
1690 if (retval < 0) {
1691 SBP2_ERR("hpsb_node_write failed.\n");
1692 return -EIO;
1693 }
1694
1695 /*
1696 * Need to make sure orb pointer is written on next command
1697 */
1698 scsi_id->last_orb = NULL;
1699
1700 return(0);
1701}
1702
1703/*
1704 * This function is called to create the actual command orb and s/g list
1705 * out of the scsi command itself.
1706 */
1707static int sbp2_create_command_orb(struct scsi_id_instance_data *scsi_id,
1708 struct sbp2_command_info *command,
1709 unchar *scsi_cmd,
1710 unsigned int scsi_use_sg,
1711 unsigned int scsi_request_bufflen,
1712 void *scsi_request_buffer,
1713 enum dma_data_direction dma_dir)
1714
1715{
1716 struct sbp2scsi_host_info *hi = scsi_id->hi;
1717 struct scatterlist *sgpnt = (struct scatterlist *) scsi_request_buffer;
1718 struct sbp2_command_orb *command_orb = &command->command_orb;
1719 struct sbp2_unrestricted_page_table *scatter_gather_element =
1720 &command->scatter_gather_element[0];
1721 u32 sg_count, sg_len, orb_direction;
1722 dma_addr_t sg_addr;
1723 int i;
1724
1725 /*
1726 * Set-up our command ORB..
1727 *
1728 * NOTE: We're doing unrestricted page tables (s/g), as this is
1729 * best performance (at least with the devices I have). This means
1730 * that data_size becomes the number of s/g elements, and
1731 * page_size should be zero (for unrestricted).
1732 */
1733 command_orb->next_ORB_hi = ORB_SET_NULL_PTR(1);
1734 command_orb->next_ORB_lo = 0x0;
1735 command_orb->misc = ORB_SET_MAX_PAYLOAD(scsi_id->max_payload_size);
1736 command_orb->misc |= ORB_SET_SPEED(scsi_id->speed_code);
1737 command_orb->misc |= ORB_SET_NOTIFY(1); /* Notify us when complete */
1738
1739 /*
1740 * Get the direction of the transfer. If the direction is unknown, then use our
1741 * goofy table as a back-up.
1742 */
1743 switch (dma_dir) {
1744 case DMA_NONE:
1745 orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
1746 break;
1747 case DMA_TO_DEVICE:
1748 orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA;
1749 break;
1750 case DMA_FROM_DEVICE:
1751 orb_direction = ORB_DIRECTION_READ_FROM_MEDIA;
1752 break;
1753 case DMA_BIDIRECTIONAL:
1754 default:
1755 SBP2_ERR("SCSI data transfer direction not specified. "
1756 "Update the SBP2 direction table in sbp2.h if "
1757 "necessary for your application");
1758 __scsi_print_command(scsi_cmd);
1759 orb_direction = sbp2scsi_direction_table[*scsi_cmd];
1760 break;
1761 }
1762
1763 /*
1764 * Set-up our pagetable stuff... unfortunately, this has become
1765 * messier than I'd like. Need to clean this up a bit. ;-)
1766 */
1767 if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) {
1768
1769 SBP2_DEBUG("No data transfer");
1770
1771 /*
1772 * Handle no data transfer
1773 */
1774 command_orb->data_descriptor_hi = 0x0;
1775 command_orb->data_descriptor_lo = 0x0;
1776 command_orb->misc |= ORB_SET_DIRECTION(1);
1777
1778 } else if (scsi_use_sg) {
1779
1780 SBP2_DEBUG("Use scatter/gather");
1781
1782 /*
1783 * Special case if only one element (and less than 64KB in size)
1784 */
1785 if ((scsi_use_sg == 1) && (sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) {
1786
1787 SBP2_DEBUG("Only one s/g element");
1788 command->dma_dir = dma_dir;
1789 command->dma_size = sgpnt[0].length;
1790 command->dma_type = CMD_DMA_PAGE;
1791 command->cmd_dma = pci_map_page(hi->host->pdev,
1792 sgpnt[0].page,
1793 sgpnt[0].offset,
1794 command->dma_size,
1795 command->dma_dir);
1796 SBP2_DMA_ALLOC("single page scatter element");
1797
1798 command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1799 command_orb->data_descriptor_lo = command->cmd_dma;
1800 command_orb->misc |= ORB_SET_DATA_SIZE(command->dma_size);
1801 command_orb->misc |= ORB_SET_DIRECTION(orb_direction);
1802
1803 } else {
1804 int count = pci_map_sg(hi->host->pdev, sgpnt, scsi_use_sg, dma_dir);
1805 SBP2_DMA_ALLOC("scatter list");
1806
1807 command->dma_size = scsi_use_sg;
1808 command->dma_dir = dma_dir;
1809 command->sge_buffer = sgpnt;
1810
1811 /* use page tables (s/g) */
1812 command_orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1813 command_orb->misc |= ORB_SET_DIRECTION(orb_direction);
1814 command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1815 command_orb->data_descriptor_lo = command->sge_dma;
1816
1817 /*
1818 * Loop through and fill out our sbp-2 page tables
1819 * (and split up anything too large)
1820 */
1821 for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) {
1822 sg_len = sg_dma_len(sgpnt);
1823 sg_addr = sg_dma_address(sgpnt);
1824 while (sg_len) {
1825 scatter_gather_element[sg_count].segment_base_lo = sg_addr;
1826 if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
1827 scatter_gather_element[sg_count].length_segment_base_hi =
1828 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
1829 sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
1830 sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
1831 } else {
1832 scatter_gather_element[sg_count].length_segment_base_hi =
1833 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
1834 sg_len = 0;
1835 }
1836 sg_count++;
1837 }
1838 }
1839
1840 /* Number of page table (s/g) elements */
1841 command_orb->misc |= ORB_SET_DATA_SIZE(sg_count);
1842
1843 sbp2util_packet_dump(scatter_gather_element,
1844 (sizeof(struct sbp2_unrestricted_page_table)) * sg_count,
1845 "sbp2 s/g list", command->sge_dma);
1846
1847 /*
1848 * Byte swap page tables if necessary
1849 */
1850 sbp2util_cpu_to_be32_buffer(scatter_gather_element,
1851 (sizeof(struct sbp2_unrestricted_page_table)) *
1852 sg_count);
1853
1854 }
1855
1856 } else {
1857
1858 SBP2_DEBUG("No scatter/gather");
1859
1860 command->dma_dir = dma_dir;
1861 command->dma_size = scsi_request_bufflen;
1862 command->dma_type = CMD_DMA_SINGLE;
1863 command->cmd_dma = pci_map_single (hi->host->pdev, scsi_request_buffer,
1864 command->dma_size,
1865 command->dma_dir);
1866 SBP2_DMA_ALLOC("single bulk");
1867
1868 /*
1869 * Handle case where we get a command w/o s/g enabled (but
1870 * check for transfers larger than 64K)
1871 */
1872 if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) {
1873
1874 command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1875 command_orb->data_descriptor_lo = command->cmd_dma;
1876 command_orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen);
1877 command_orb->misc |= ORB_SET_DIRECTION(orb_direction);
1878
1879 /*
1880 * Sanity, in case our direction table is not
1881 * up-to-date
1882 */
1883 if (!scsi_request_bufflen) {
1884 command_orb->data_descriptor_hi = 0x0;
1885 command_orb->data_descriptor_lo = 0x0;
1886 command_orb->misc |= ORB_SET_DIRECTION(1);
1887 }
1888
1889 } else {
1890 /*
1891 * Need to turn this into page tables, since the
1892 * buffer is too large.
1893 */
1894 command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1895 command_orb->data_descriptor_lo = command->sge_dma;
1896
1897 /* Use page tables (s/g) */
1898 command_orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1899 command_orb->misc |= ORB_SET_DIRECTION(orb_direction);
1900
1901 /*
1902 * fill out our sbp-2 page tables (and split up
1903 * the large buffer)
1904 */
1905 sg_count = 0;
1906 sg_len = scsi_request_bufflen;
1907 sg_addr = command->cmd_dma;
1908 while (sg_len) {
1909 scatter_gather_element[sg_count].segment_base_lo = sg_addr;
1910 if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
1911 scatter_gather_element[sg_count].length_segment_base_hi =
1912 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
1913 sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
1914 sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
1915 } else {
1916 scatter_gather_element[sg_count].length_segment_base_hi =
1917 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
1918 sg_len = 0;
1919 }
1920 sg_count++;
1921 }
1922
1923 /* Number of page table (s/g) elements */
1924 command_orb->misc |= ORB_SET_DATA_SIZE(sg_count);
1925
1926 sbp2util_packet_dump(scatter_gather_element,
1927 (sizeof(struct sbp2_unrestricted_page_table)) * sg_count,
1928 "sbp2 s/g list", command->sge_dma);
1929
1930 /*
1931 * Byte swap page tables if necessary
1932 */
1933 sbp2util_cpu_to_be32_buffer(scatter_gather_element,
1934 (sizeof(struct sbp2_unrestricted_page_table)) *
1935 sg_count);
1936
1937 }
1938
1939 }
1940
1941 /*
1942 * Byte swap command ORB if necessary
1943 */
1944 sbp2util_cpu_to_be32_buffer(command_orb, sizeof(struct sbp2_command_orb));
1945
1946 /*
1947 * Put our scsi command in the command ORB
1948 */
1949 memset(command_orb->cdb, 0, 12);
1950 memcpy(command_orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd));
1951
1952 return(0);
1953}
1954
1955/*
1956 * This function is called in order to begin a regular SBP-2 command.
1957 */
1958static int sbp2_link_orb_command(struct scsi_id_instance_data *scsi_id,
1959 struct sbp2_command_info *command)
1960{
1961 struct sbp2scsi_host_info *hi = scsi_id->hi;
1962 struct sbp2_command_orb *command_orb = &command->command_orb;
1963 struct node_entry *ne = scsi_id->ne;
1964 u64 addr;
1965
1966 outstanding_orb_incr;
1967 SBP2_ORB_DEBUG("sending command orb %p, total orbs = %x",
1968 command_orb, global_outstanding_command_orbs);
1969
1970 pci_dma_sync_single_for_device(hi->host->pdev, command->command_orb_dma,
1971 sizeof(struct sbp2_command_orb),
1972 PCI_DMA_BIDIRECTIONAL);
1973 pci_dma_sync_single_for_device(hi->host->pdev, command->sge_dma,
1974 sizeof(command->scatter_gather_element),
1975 PCI_DMA_BIDIRECTIONAL);
1976 /*
1977 * Check to see if there are any previous orbs to use
1978 */
1979 if (scsi_id->last_orb == NULL) {
1980 quadlet_t data[2];
1981
1982 /*
1983 * Ok, let's write to the target's management agent register
1984 */
1985 addr = scsi_id->sbp2_command_block_agent_addr + SBP2_ORB_POINTER_OFFSET;
1986 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1987 data[1] = command->command_orb_dma;
1988 sbp2util_cpu_to_be32_buffer(data, 8);
1989
1990 SBP2_ORB_DEBUG("write command agent, command orb %p", command_orb);
1991
1992 if (sbp2util_node_write_no_wait(ne, addr, data, 8) < 0) {
1993 SBP2_ERR("sbp2util_node_write_no_wait failed.\n");
1994 return -EIO;
1995 }
1996
1997 SBP2_ORB_DEBUG("write command agent complete");
1998
1999 scsi_id->last_orb = command_orb;
2000 scsi_id->last_orb_dma = command->command_orb_dma;
2001
2002 } else {
2003 quadlet_t data;
2004
2005 /*
2006 * We have an orb already sent (maybe or maybe not
2007 * processed) that we can append this orb to. So do so,
2008 * and ring the doorbell. Have to be very careful
2009 * modifying these next orb pointers, as they are accessed
2010 * both by the sbp2 device and us.
2011 */
2012 scsi_id->last_orb->next_ORB_lo =
2013 cpu_to_be32(command->command_orb_dma);
2014 /* Tells hardware that this pointer is valid */
2015 scsi_id->last_orb->next_ORB_hi = 0x0;
2016 pci_dma_sync_single_for_device(hi->host->pdev, scsi_id->last_orb_dma,
2017 sizeof(struct sbp2_command_orb),
2018 PCI_DMA_BIDIRECTIONAL);
2019
2020 /*
2021 * Ring the doorbell
2022 */
2023 data = cpu_to_be32(command->command_orb_dma);
2024 addr = scsi_id->sbp2_command_block_agent_addr + SBP2_DOORBELL_OFFSET;
2025
2026 SBP2_ORB_DEBUG("ring doorbell, command orb %p", command_orb);
2027
2028 if (sbp2util_node_write_no_wait(ne, addr, &data, 4) < 0) {
2029 SBP2_ERR("sbp2util_node_write_no_wait failed");
2030 return(-EIO);
2031 }
2032
2033 scsi_id->last_orb = command_orb;
2034 scsi_id->last_orb_dma = command->command_orb_dma;
2035
2036 }
2037 return(0);
2038}
2039
2040/*
2041 * This function is called in order to begin a regular SBP-2 command.
2042 */
2043static int sbp2_send_command(struct scsi_id_instance_data *scsi_id,
2044 struct scsi_cmnd *SCpnt,
2045 void (*done)(struct scsi_cmnd *))
2046{
2047 unchar *cmd = (unchar *) SCpnt->cmnd;
2048 unsigned int request_bufflen = SCpnt->request_bufflen;
2049 struct sbp2_command_info *command;
2050
2051 SBP2_DEBUG("sbp2_send_command");
2052#if (CONFIG_IEEE1394_SBP2_DEBUG >= 2) || defined(CONFIG_IEEE1394_SBP2_PACKET_DUMP)
2053 printk("[scsi command]\n ");
2054 scsi_print_command(SCpnt);
2055#endif
2056 SBP2_DEBUG("SCSI transfer size = %x", request_bufflen);
2057 SBP2_DEBUG("SCSI s/g elements = %x", (unsigned int)SCpnt->use_sg);
2058
2059 /*
2060 * Allocate a command orb and s/g structure
2061 */
2062 command = sbp2util_allocate_command_orb(scsi_id, SCpnt, done);
2063 if (!command) {
2064 return(-EIO);
2065 }
2066
2067 /*
2068 * The scsi stack sends down a request_bufflen which does not match the
2069 * length field in the scsi cdb. This causes some sbp2 devices to
2070 * reject this inquiry command. Fix the request_bufflen.
2071 */
2072 if (*cmd == INQUIRY) {
2073 if (force_inquiry_hack || scsi_id->workarounds & SBP2_BREAKAGE_INQUIRY_HACK)
2074 request_bufflen = cmd[4] = 0x24;
2075 else
2076 request_bufflen = cmd[4];
2077 }
2078
2079 /*
2080 * Now actually fill in the comamnd orb and sbp2 s/g list
2081 */
2082 sbp2_create_command_orb(scsi_id, command, cmd, SCpnt->use_sg,
2083 request_bufflen, SCpnt->request_buffer,
2084 SCpnt->sc_data_direction);
2085 /*
2086 * Update our cdb if necessary (to handle sbp2 RBC command set
2087 * differences). This is where the command set hacks go! =)
2088 */
2089 sbp2_check_sbp2_command(scsi_id, command->command_orb.cdb);
2090
2091 sbp2util_packet_dump(&command->command_orb, sizeof(struct sbp2_command_orb),
2092 "sbp2 command orb", command->command_orb_dma);
2093
2094 /*
2095 * Initialize status fifo
2096 */
2097 memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
2098
2099 /*
2100 * Link up the orb, and ring the doorbell if needed
2101 */
2102 sbp2_link_orb_command(scsi_id, command);
2103
2104 return(0);
2105}
2106
2107
2108/*
2109 * This function deals with command set differences between Linux scsi
2110 * command set and sbp2 RBC command set.
2111 */
2112static void sbp2_check_sbp2_command(struct scsi_id_instance_data *scsi_id, unchar *cmd)
2113{
2114 unchar new_cmd[16];
2115 u8 device_type = SBP2_DEVICE_TYPE (scsi_id->sbp2_device_type_and_lun);
2116
2117 SBP2_DEBUG("sbp2_check_sbp2_command");
2118
2119 switch (*cmd) {
2120
2121 case READ_6:
2122
2123 if (sbp2_command_conversion_device_type(device_type)) {
2124
2125 SBP2_DEBUG("Convert READ_6 to READ_10");
2126
2127 /*
2128 * Need to turn read_6 into read_10
2129 */
2130 new_cmd[0] = 0x28;
2131 new_cmd[1] = (cmd[1] & 0xe0);
2132 new_cmd[2] = 0x0;
2133 new_cmd[3] = (cmd[1] & 0x1f);
2134 new_cmd[4] = cmd[2];
2135 new_cmd[5] = cmd[3];
2136 new_cmd[6] = 0x0;
2137 new_cmd[7] = 0x0;
2138 new_cmd[8] = cmd[4];
2139 new_cmd[9] = cmd[5];
2140
2141 memcpy(cmd, new_cmd, 10);
2142
2143 }
2144
2145 break;
2146
2147 case WRITE_6:
2148
2149 if (sbp2_command_conversion_device_type(device_type)) {
2150
2151 SBP2_DEBUG("Convert WRITE_6 to WRITE_10");
2152
2153 /*
2154 * Need to turn write_6 into write_10
2155 */
2156 new_cmd[0] = 0x2a;
2157 new_cmd[1] = (cmd[1] & 0xe0);
2158 new_cmd[2] = 0x0;
2159 new_cmd[3] = (cmd[1] & 0x1f);
2160 new_cmd[4] = cmd[2];
2161 new_cmd[5] = cmd[3];
2162 new_cmd[6] = 0x0;
2163 new_cmd[7] = 0x0;
2164 new_cmd[8] = cmd[4];
2165 new_cmd[9] = cmd[5];
2166
2167 memcpy(cmd, new_cmd, 10);
2168
2169 }
2170
2171 break;
2172
2173 case MODE_SENSE:
2174
2175 if (sbp2_command_conversion_device_type(device_type)) {
2176
2177 SBP2_DEBUG("Convert MODE_SENSE_6 to MODE_SENSE_10");
2178
2179 /*
2180 * Need to turn mode_sense_6 into mode_sense_10
2181 */
2182 new_cmd[0] = 0x5a;
2183 new_cmd[1] = cmd[1];
2184 new_cmd[2] = cmd[2];
2185 new_cmd[3] = 0x0;
2186 new_cmd[4] = 0x0;
2187 new_cmd[5] = 0x0;
2188 new_cmd[6] = 0x0;
2189 new_cmd[7] = 0x0;
2190 new_cmd[8] = cmd[4];
2191 new_cmd[9] = cmd[5];
2192
2193 memcpy(cmd, new_cmd, 10);
2194
2195 }
2196
2197 break;
2198
2199 case MODE_SELECT:
2200
2201 /*
2202 * TODO. Probably need to change mode select to 10 byte version
2203 */
2204
2205 default:
2206 break;
2207 }
2208
2209 return;
2210}
2211
2212/*
2213 * Translates SBP-2 status into SCSI sense data for check conditions
2214 */
2215static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, unchar *sense_data)
2216{
2217 SBP2_DEBUG("sbp2_status_to_sense_data");
2218
2219 /*
2220 * Ok, it's pretty ugly... ;-)
2221 */
2222 sense_data[0] = 0x70;
2223 sense_data[1] = 0x0;
2224 sense_data[2] = sbp2_status[9];
2225 sense_data[3] = sbp2_status[12];
2226 sense_data[4] = sbp2_status[13];
2227 sense_data[5] = sbp2_status[14];
2228 sense_data[6] = sbp2_status[15];
2229 sense_data[7] = 10;
2230 sense_data[8] = sbp2_status[16];
2231 sense_data[9] = sbp2_status[17];
2232 sense_data[10] = sbp2_status[18];
2233 sense_data[11] = sbp2_status[19];
2234 sense_data[12] = sbp2_status[10];
2235 sense_data[13] = sbp2_status[11];
2236 sense_data[14] = sbp2_status[20];
2237 sense_data[15] = sbp2_status[21];
2238
2239 return(sbp2_status[8] & 0x3f); /* return scsi status */
2240}
2241
2242/*
2243 * This function is called after a command is completed, in order to do any necessary SBP-2
2244 * response data translations for the SCSI stack
2245 */
2246static void sbp2_check_sbp2_response(struct scsi_id_instance_data *scsi_id,
2247 struct scsi_cmnd *SCpnt)
2248{
2249 u8 *scsi_buf = SCpnt->request_buffer;
2250 u8 device_type = SBP2_DEVICE_TYPE (scsi_id->sbp2_device_type_and_lun);
2251
2252 SBP2_DEBUG("sbp2_check_sbp2_response");
2253
2254 switch (SCpnt->cmnd[0]) {
2255
2256 case INQUIRY:
2257
2258 /*
2259 * If scsi_id->sbp2_device_type_and_lun is uninitialized, then fill
2260 * this information in from the inquiry response data. Lun is set to zero.
2261 */
2262 if (scsi_id->sbp2_device_type_and_lun == SBP2_DEVICE_TYPE_LUN_UNINITIALIZED) {
2263 SBP2_DEBUG("Creating sbp2_device_type_and_lun from scsi inquiry data");
2264 scsi_id->sbp2_device_type_and_lun = (scsi_buf[0] & 0x1f) << 16;
2265 }
2266
2267 /*
2268 * Make sure data length is ok. Minimum length is 36 bytes
2269 */
2270 if (scsi_buf[4] == 0) {
2271 scsi_buf[4] = 36 - 5;
2272 }
2273
2274 /*
2275 * Check for Simple Direct Access Device and change it to TYPE_DISK
2276 */
2277 if ((scsi_buf[0] & 0x1f) == TYPE_SDAD) {
2278 SBP2_DEBUG("Changing TYPE_SDAD to TYPE_DISK");
2279 scsi_buf[0] &= 0xe0;
2280 }
2281
2282 /*
2283 * Fix ansi revision and response data format
2284 */
2285 scsi_buf[2] |= 2;
2286 scsi_buf[3] = (scsi_buf[3] & 0xf0) | 2;
2287
2288 break;
2289
2290 case MODE_SENSE:
2291
2292 if (sbp2_command_conversion_device_type(device_type)) {
2293
2294 SBP2_DEBUG("Modify mode sense response (10 byte version)");
2295
2296 scsi_buf[0] = scsi_buf[1]; /* Mode data length */
2297 scsi_buf[1] = scsi_buf[2]; /* Medium type */
2298 scsi_buf[2] = scsi_buf[3]; /* Device specific parameter */
2299 scsi_buf[3] = scsi_buf[7]; /* Block descriptor length */
2300 memcpy(scsi_buf + 4, scsi_buf + 8, scsi_buf[0]);
2301 }
2302
2303 break;
2304
2305 case MODE_SELECT:
2306
2307 /*
2308 * TODO. Probably need to change mode select to 10 byte version
2309 */
2310
2311 default:
2312 break;
2313 }
2314 return;
2315}
2316
2317/*
2318 * This function deals with status writes from the SBP-2 device
2319 */
2320static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, int destid,
2321 quadlet_t *data, u64 addr, size_t length, u16 fl)
2322{
2323 struct sbp2scsi_host_info *hi;
2324 struct scsi_id_instance_data *scsi_id = NULL, *scsi_id_tmp;
2325 u32 id;
2326 struct scsi_cmnd *SCpnt = NULL;
2327 u32 scsi_status = SBP2_SCSI_STATUS_GOOD;
2328 struct sbp2_command_info *command;
2329
2330 SBP2_DEBUG("sbp2_handle_status_write");
2331
2332 sbp2util_packet_dump(data, length, "sbp2 status write by device", (u32)addr);
2333
2334 if (!host) {
2335 SBP2_ERR("host is NULL - this is bad!");
2336 return(RCODE_ADDRESS_ERROR);
2337 }
2338
2339 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
2340
2341 if (!hi) {
2342 SBP2_ERR("host info is NULL - this is bad!");
2343 return(RCODE_ADDRESS_ERROR);
2344 }
2345
2346 /*
2347 * Find our scsi_id structure by looking at the status fifo address written to by
2348 * the sbp2 device.
2349 */
2350 id = SBP2_STATUS_FIFO_OFFSET_TO_ENTRY((u32)(addr - SBP2_STATUS_FIFO_ADDRESS));
2351 list_for_each_entry(scsi_id_tmp, &hi->scsi_ids, scsi_list) {
2352 if (scsi_id_tmp->ne->nodeid == nodeid && scsi_id_tmp->ud->id == id) {
2353 scsi_id = scsi_id_tmp;
2354 break;
2355 }
2356 }
2357
2358 if (!scsi_id) {
2359 SBP2_ERR("scsi_id is NULL - device is gone?");
2360 return(RCODE_ADDRESS_ERROR);
2361 }
2362
2363 /*
2364 * Put response into scsi_id status fifo...
2365 */
2366 memcpy(&scsi_id->status_block, data, length);
2367
2368 /*
2369 * Byte swap first two quadlets (8 bytes) of status for processing
2370 */
2371 sbp2util_be32_to_cpu_buffer(&scsi_id->status_block, 8);
2372
2373 /*
2374 * Handle command ORB status here if necessary. First, need to match status with command.
2375 */
2376 command = sbp2util_find_command_for_orb(scsi_id, scsi_id->status_block.ORB_offset_lo);
2377 if (command) {
2378
2379 SBP2_DEBUG("Found status for command ORB");
2380 pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma,
2381 sizeof(struct sbp2_command_orb),
2382 PCI_DMA_BIDIRECTIONAL);
2383 pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma,
2384 sizeof(command->scatter_gather_element),
2385 PCI_DMA_BIDIRECTIONAL);
2386
2387 SBP2_ORB_DEBUG("matched command orb %p", &command->command_orb);
2388 outstanding_orb_decr;
2389
2390 /*
2391 * Matched status with command, now grab scsi command pointers and check status
2392 */
2393 SCpnt = command->Current_SCpnt;
2394 sbp2util_mark_command_completed(scsi_id, command);
2395
2396 if (SCpnt) {
2397
2398 /*
2399 * See if the target stored any scsi status information
2400 */
2401 if (STATUS_GET_LENGTH(scsi_id->status_block.ORB_offset_hi_misc) > 1) {
2402 /*
2403 * Translate SBP-2 status to SCSI sense data
2404 */
2405 SBP2_DEBUG("CHECK CONDITION");
2406 scsi_status = sbp2_status_to_sense_data((unchar *)&scsi_id->status_block, SCpnt->sense_buffer);
2407 }
2408
2409 /*
2410 * Check to see if the dead bit is set. If so, we'll have to initiate
2411 * a fetch agent reset.
2412 */
2413 if (STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc)) {
2414
2415 /*
2416 * Initiate a fetch agent reset.
2417 */
2418 SBP2_DEBUG("Dead bit set - initiating fetch agent reset");
2419 sbp2_agent_reset(scsi_id, 0);
2420 }
2421
2422 SBP2_ORB_DEBUG("completing command orb %p", &command->command_orb);
2423 }
2424
2425 /*
2426 * Check here to see if there are no commands in-use. If there are none, we can
2427 * null out last orb so that next time around we write directly to the orb pointer...
2428 * Quick start saves one 1394 bus transaction.
2429 */
2430 if (list_empty(&scsi_id->sbp2_command_orb_inuse)) {
2431 scsi_id->last_orb = NULL;
2432 }
2433
2434 } else {
2435
2436 /*
2437 * It's probably a login/logout/reconnect status.
2438 */
2439 if ((scsi_id->login_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
2440 (scsi_id->query_logins_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
2441 (scsi_id->reconnect_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
2442 (scsi_id->logout_orb_dma == scsi_id->status_block.ORB_offset_lo)) {
2443 atomic_set(&scsi_id->sbp2_login_complete, 1);
2444 }
2445 }
2446
2447 if (SCpnt) {
2448
2449 /* Complete the SCSI command. */
2450 SBP2_DEBUG("Completing SCSI command");
2451 sbp2scsi_complete_command(scsi_id, scsi_status, SCpnt,
2452 command->Current_done);
2453 SBP2_ORB_DEBUG("command orb completed");
2454 }
2455
2456 return(RCODE_COMPLETE);
2457}
2458
2459
2460/**************************************
2461 * SCSI interface related section
2462 **************************************/
2463
2464/*
2465 * This routine is the main request entry routine for doing I/O. It is
2466 * called from the scsi stack directly.
2467 */
2468static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt,
2469 void (*done)(struct scsi_cmnd *))
2470{
2471 struct scsi_id_instance_data *scsi_id =
2472 (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
2473 struct sbp2scsi_host_info *hi;
2474
2475 SBP2_DEBUG("sbp2scsi_queuecommand");
2476
2477 /*
2478 * If scsi_id is null, it means there is no device in this slot,
2479 * so we should return selection timeout.
2480 */
2481 if (!scsi_id) {
2482 SCpnt->result = DID_NO_CONNECT << 16;
2483 done (SCpnt);
2484 return 0;
2485 }
2486
2487 hi = scsi_id->hi;
2488
2489 if (!hi) {
2490 SBP2_ERR("sbp2scsi_host_info is NULL - this is bad!");
2491 SCpnt->result = DID_NO_CONNECT << 16;
2492 done (SCpnt);
2493 return(0);
2494 }
2495
2496 /*
2497 * Until we handle multiple luns, just return selection time-out
2498 * to any IO directed at non-zero LUNs
2499 */
2500 if (SCpnt->device->lun) {
2501 SCpnt->result = DID_NO_CONNECT << 16;
2502 done (SCpnt);
2503 return(0);
2504 }
2505
2506 /*
2507 * Check for request sense command, and handle it here
2508 * (autorequest sense)
2509 */
2510 if (SCpnt->cmnd[0] == REQUEST_SENSE) {
2511 SBP2_DEBUG("REQUEST_SENSE");
2512 memcpy(SCpnt->request_buffer, SCpnt->sense_buffer, SCpnt->request_bufflen);
2513 memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer));
2514 sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_GOOD, SCpnt, done);
2515 return(0);
2516 }
2517
2518 /*
2519 * Check to see if we are in the middle of a bus reset.
2520 */
2521 if (!hpsb_node_entry_valid(scsi_id->ne)) {
2522 SBP2_ERR("Bus reset in progress - rejecting command");
2523 SCpnt->result = DID_BUS_BUSY << 16;
2524 done (SCpnt);
2525 return(0);
2526 }
2527
2528 /*
2529 * Try and send our SCSI command
2530 */
2531 if (sbp2_send_command(scsi_id, SCpnt, done)) {
2532 SBP2_ERR("Error sending SCSI command");
2533 sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_SELECTION_TIMEOUT,
2534 SCpnt, done);
2535 }
2536
2537 return(0);
2538}
2539
2540/*
2541 * This function is called in order to complete all outstanding SBP-2
2542 * commands (in case of resets, etc.).
2543 */
2544static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id,
2545 u32 status)
2546{
2547 struct sbp2scsi_host_info *hi = scsi_id->hi;
2548 struct list_head *lh;
2549 struct sbp2_command_info *command;
2550
2551 SBP2_DEBUG("sbp2scsi_complete_all_commands");
2552
2553 while (!list_empty(&scsi_id->sbp2_command_orb_inuse)) {
2554 SBP2_DEBUG("Found pending command to complete");
2555 lh = scsi_id->sbp2_command_orb_inuse.next;
2556 command = list_entry(lh, struct sbp2_command_info, list);
2557 pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma,
2558 sizeof(struct sbp2_command_orb),
2559 PCI_DMA_BIDIRECTIONAL);
2560 pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma,
2561 sizeof(command->scatter_gather_element),
2562 PCI_DMA_BIDIRECTIONAL);
2563 sbp2util_mark_command_completed(scsi_id, command);
2564 if (command->Current_SCpnt) {
2565 command->Current_SCpnt->result = status << 16;
2566 command->Current_done(command->Current_SCpnt);
2567 }
2568 }
2569
2570 return;
2571}
2572
2573/*
2574 * This function is called in order to complete a regular SBP-2 command.
2575 *
2576 * This can be called in interrupt context.
2577 */
2578static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id,
2579 u32 scsi_status, struct scsi_cmnd *SCpnt,
2580 void (*done)(struct scsi_cmnd *))
2581{
2582 unsigned long flags;
2583
2584 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 */
2682 spin_lock_irqsave(scsi_id->scsi_host->host_lock,flags);
2683 done (SCpnt);
2684 spin_unlock_irqrestore(scsi_id->scsi_host->host_lock,flags);
2685
2686 return;
2687}
2688
2689
2690static int sbp2scsi_slave_configure (struct scsi_device *sdev)
2691{
2692 blk_queue_dma_alignment(sdev->request_queue, (512 - 1));
2693
2694 return 0;
2695}
2696
2697
2698/*
2699 * Called by scsi stack when something has really gone wrong. Usually
2700 * called when a command has timed-out for some reason.
2701 */
2702static int sbp2scsi_abort(struct scsi_cmnd *SCpnt)
2703{
2704 struct scsi_id_instance_data *scsi_id =
2705 (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
2706 struct sbp2scsi_host_info *hi = scsi_id->hi;
2707 struct sbp2_command_info *command;
2708
2709 SBP2_ERR("aborting sbp2 command");
2710 scsi_print_command(SCpnt);
2711
2712 if (scsi_id) {
2713
2714 /*
2715 * Right now, just return any matching command structures
2716 * to the free pool.
2717 */
2718 command = sbp2util_find_command_for_SCpnt(scsi_id, SCpnt);
2719 if (command) {
2720 SBP2_DEBUG("Found command to abort");
2721 pci_dma_sync_single_for_cpu(hi->host->pdev,
2722 command->command_orb_dma,
2723 sizeof(struct sbp2_command_orb),
2724 PCI_DMA_BIDIRECTIONAL);
2725 pci_dma_sync_single_for_cpu(hi->host->pdev,
2726 command->sge_dma,
2727 sizeof(command->scatter_gather_element),
2728 PCI_DMA_BIDIRECTIONAL);
2729 sbp2util_mark_command_completed(scsi_id, command);
2730 if (command->Current_SCpnt) {
2731 command->Current_SCpnt->result = DID_ABORT << 16;
2732 command->Current_done(command->Current_SCpnt);
2733 }
2734 }
2735
2736 /*
2737 * Initiate a fetch agent reset.
2738 */
2739 sbp2_agent_reset(scsi_id, 0);
2740 sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY);
2741 }
2742
2743 return(SUCCESS);
2744}
2745
2746/*
2747 * Called by scsi stack when something has really gone wrong.
2748 */
2749static int sbp2scsi_reset(struct scsi_cmnd *SCpnt)
2750{
2751 struct scsi_id_instance_data *scsi_id =
2752 (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
2753
2754 SBP2_ERR("reset requested");
2755
2756 if (scsi_id) {
2757 SBP2_ERR("Generating sbp2 fetch agent reset");
2758 sbp2_agent_reset(scsi_id, 0);
2759 }
2760
2761 return(SUCCESS);
2762}
2763
2764static const char *sbp2scsi_info (struct Scsi_Host *host)
2765{
2766 return "SCSI emulation for IEEE-1394 SBP-2 Devices";
2767}
2768
2769static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev, char *buf)
2770{
2771 struct scsi_device *sdev;
2772 struct scsi_id_instance_data *scsi_id;
2773 int lun;
2774
2775 if (!(sdev = to_scsi_device(dev)))
2776 return 0;
2777
2778 if (!(scsi_id = (struct scsi_id_instance_data *)sdev->host->hostdata[0]))
2779 return 0;
2780
2781 if (scsi_id->sbp2_device_type_and_lun == SBP2_DEVICE_TYPE_LUN_UNINITIALIZED)
2782 lun = 0;
2783 else
2784 lun = ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun);
2785
2786 return sprintf(buf, "%016Lx:%d:%d\n", (unsigned long long)scsi_id->ne->guid,
2787 scsi_id->ud->id, lun);
2788}
2789static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL);
2790
2791static struct device_attribute *sbp2_sysfs_sdev_attrs[] = {
2792 &dev_attr_ieee1394_id,
2793 NULL
2794};
2795
2796MODULE_AUTHOR("Ben Collins <bcollins@debian.org>");
2797MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver");
2798MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME);
2799MODULE_LICENSE("GPL");
2800
2801/* SCSI host template */
2802static struct scsi_host_template scsi_driver_template = {
2803 .module = THIS_MODULE,
2804 .name = "SBP-2 IEEE-1394",
2805 .proc_name = SBP2_DEVICE_NAME,
2806 .info = sbp2scsi_info,
2807 .queuecommand = sbp2scsi_queuecommand,
2808 .eh_abort_handler = sbp2scsi_abort,
2809 .eh_device_reset_handler = sbp2scsi_reset,
2810 .eh_bus_reset_handler = sbp2scsi_reset,
2811 .eh_host_reset_handler = sbp2scsi_reset,
2812 .slave_configure = sbp2scsi_slave_configure,
2813 .this_id = -1,
2814 .sg_tablesize = SG_ALL,
2815 .use_clustering = ENABLE_CLUSTERING,
2816 .cmd_per_lun = SBP2_MAX_CMDS,
2817 .can_queue = SBP2_MAX_CMDS,
2818 .emulated = 1,
2819 .sdev_attrs = sbp2_sysfs_sdev_attrs,
2820};
2821
2822static int sbp2_module_init(void)
2823{
2824 int ret;
2825
2826 SBP2_DEBUG("sbp2_module_init");
2827
2828 printk(KERN_INFO "sbp2: %s\n", version);
2829
2830 /* Module load debug option to force one command at a time (serializing I/O) */
2831 if (serialize_io) {
2832 SBP2_ERR("Driver forced to serialize I/O (serialize_io = 1)");
2833 scsi_driver_template.can_queue = 1;
2834 scsi_driver_template.cmd_per_lun = 1;
2835 }
2836
2837 /* Set max sectors (module load option). Default is 255 sectors. */
2838 scsi_driver_template.max_sectors = max_sectors;
2839
2840
2841 /* Register our high level driver with 1394 stack */
2842 hpsb_register_highlevel(&sbp2_highlevel);
2843
2844 ret = hpsb_register_protocol(&sbp2_driver);
2845 if (ret) {
2846 SBP2_ERR("Failed to register protocol");
2847 hpsb_unregister_highlevel(&sbp2_highlevel);
2848 return ret;
2849 }
2850
2851 return 0;
2852}
2853
2854static void __exit sbp2_module_exit(void)
2855{
2856 SBP2_DEBUG("sbp2_module_exit");
2857
2858 hpsb_unregister_protocol(&sbp2_driver);
2859
2860 hpsb_unregister_highlevel(&sbp2_highlevel);
2861}
2862
2863module_init(sbp2_module_init);
2864module_exit(sbp2_module_exit);
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-18 13:53:07 -0500