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ohci1394: clean up asynchronous and physical request filters programming
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / ieee1394 / sbp2.c
CommitLineData
1da177e4
LT		 1/*
2 * sbp2.c - SBP-2 protocol driver for IEEE-1394
3 *
4 * Copyright (C) 2000 James Goodwin, Filanet Corporation (www.filanet.com)
5 * jamesg@filanet.com (JSG)
6 *
7 * Copyright (C) 2003 Ben Collins <bcollins@debian.org>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software Foundation,
21 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 */
23
24/*
25 * Brief Description:
26 *
27 * This driver implements the Serial Bus Protocol 2 (SBP-2) over IEEE-1394
28 * under Linux. The SBP-2 driver is implemented as an IEEE-1394 high-level
29 * driver. It also registers as a SCSI lower-level driver in order to accept
30 * SCSI commands for transport using SBP-2.
31 *
32 * You may access any attached SBP-2 storage devices as if they were SCSI
33 * devices (e.g. mount /dev/sda1, fdisk, mkfs, etc.).
34 *
35 * Current Issues:
36 *
37 * - Error Handling: SCSI aborts and bus reset requests are handled somewhat
38 * but the code needs additional debugging.
39 */
40
41#include <linux/config.h>
42#include <linux/kernel.h>
43#include <linux/list.h>
44#include <linux/string.h>
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
1da177e4
LT		 83/*
84 * Module load parameter definitions
85 */
86
87/*
88 * Change max_speed on module load if you have a bad IEEE-1394
89 * controller that has trouble running 2KB packets at 400mb.
90 *
91 * NOTE: On certain OHCI parts I have seen short packets on async transmit
92 * (probably due to PCI latency/throughput issues with the part). You can
93 * bump down the speed if you are running into problems.
94 */
95static int max_speed = IEEE1394_SPEED_MAX;
96module_param(max_speed, int, 0644);
2bab359a 97MODULE_PARM_DESC(max_speed, "Force max speed (3 = 800mb, 2 = 400mb, 1 = 200mb, 0 = 100mb)");
1da177e4
LT		 98
99/*
100 * Set serialize_io to 1 if you'd like only one scsi command sent
101 * down to us at a time (debugging). This might be necessary for very
102 * badly behaved sbp2 devices.
2bab359a
JM		 103 *
104 * TODO: Make this configurable per device.
1da177e4 105 */
2bab359a 106static int serialize_io = 1;
1da177e4 107module_param(serialize_io, int, 0444);
2bab359a 108MODULE_PARM_DESC(serialize_io, "Serialize I/O coming from scsi drivers (default = 1, faster = 0)");
1da177e4
LT		 109
110/*
111 * Bump up max_sectors if you'd like to support very large sized
112 * transfers. Please note that some older sbp2 bridge chips are broken for
113 * transfers greater or equal to 128KB. Default is a value of 255
114 * sectors, or just under 128KB (at 512 byte sector size). I can note that
115 * the Oxsemi sbp2 chipsets have no problems supporting very large
116 * transfer sizes.
117 */
118static int max_sectors = SBP2_MAX_SECTORS;
119module_param(max_sectors, int, 0444);
120MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported (default = 255)");
121
122/*
123 * Exclusive login to sbp2 device? In most cases, the sbp2 driver should
124 * do an exclusive login, as it's generally unsafe to have two hosts
125 * talking to a single sbp2 device at the same time (filesystem coherency,
126 * etc.). If you're running an sbp2 device that supports multiple logins,
127 * and you're either running read-only filesystems or some sort of special
128 * filesystem supporting multiple hosts (one such filesystem is OpenGFS,
129 * see opengfs.sourceforge.net for more info), then set exclusive_login
130 * to zero. Note: The Oxsemi OXFW911 sbp2 chipset supports up to four
131 * concurrent logins.
132 */
133static int exclusive_login = 1;
134module_param(exclusive_login, int, 0644);
135MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device (default = 1)");
136
137/*
138 * SCSI inquiry hack for really badly behaved sbp2 devices. Turn this on
139 * if your sbp2 device is not properly handling the SCSI inquiry command.
a80614d1
SR		 140 * This hack makes the inquiry look more like a typical MS Windows inquiry
141 * by enforcing 36 byte inquiry and avoiding access to mode_sense page 8.
1da177e4
LT		 142 *
143 * If force_inquiry_hack=1 is required for your device to work,
144 * please submit the logged sbp2_firmware_revision value of this device to
145 * the linux1394-devel mailing list.
146 */
1934b8b6 147static int force_inquiry_hack;
a80614d1 148module_param(force_inquiry_hack, int, 0644);
1da177e4
LT		 149MODULE_PARM_DESC(force_inquiry_hack, "Force SCSI inquiry hack (default = 0)");
150
1da177e4
LT		 151/*
152 * Export information about protocols/devices supported by this driver.
153 */
154static struct ieee1394_device_id sbp2_id_table[] = {
155 {
a237f35f
SR		 156 .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
157 .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff,
158 .version = SBP2_SW_VERSION_ENTRY & 0xffffff},
159 {}
1da177e4
LT		 160};
161
162MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table);
163
164/*
165 * Debug levels, configured via kernel config, or enable here.
166 */
167
44456d37 168#define CONFIG_IEEE1394_SBP2_DEBUG 0
1da177e4
LT		 169/* #define CONFIG_IEEE1394_SBP2_DEBUG_ORBS */
170/* #define CONFIG_IEEE1394_SBP2_DEBUG_DMA */
171/* #define CONFIG_IEEE1394_SBP2_DEBUG 1 */
172/* #define CONFIG_IEEE1394_SBP2_DEBUG 2 */
173/* #define CONFIG_IEEE1394_SBP2_PACKET_DUMP */
174
175#ifdef CONFIG_IEEE1394_SBP2_DEBUG_ORBS
176#define SBP2_ORB_DEBUG(fmt, args...) HPSB_ERR("sbp2(%s): "fmt, __FUNCTION__, ## args)
177static u32 global_outstanding_command_orbs = 0;
178#define outstanding_orb_incr global_outstanding_command_orbs++
179#define outstanding_orb_decr global_outstanding_command_orbs--
180#else
181#define SBP2_ORB_DEBUG(fmt, args...)
182#define outstanding_orb_incr
183#define outstanding_orb_decr
184#endif
185
186#ifdef CONFIG_IEEE1394_SBP2_DEBUG_DMA
187#define SBP2_DMA_ALLOC(fmt, args...) \
188 HPSB_ERR("sbp2(%s)alloc(%d): "fmt, __FUNCTION__, \
189 ++global_outstanding_dmas, ## args)
190#define SBP2_DMA_FREE(fmt, args...) \
191 HPSB_ERR("sbp2(%s)free(%d): "fmt, __FUNCTION__, \
192 --global_outstanding_dmas, ## args)
193static u32 global_outstanding_dmas = 0;
194#else
195#define SBP2_DMA_ALLOC(fmt, args...)
196#define SBP2_DMA_FREE(fmt, args...)
197#endif
198
199#if CONFIG_IEEE1394_SBP2_DEBUG >= 2
200#define SBP2_DEBUG(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
201#define SBP2_INFO(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
202#define SBP2_NOTICE(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
203#define SBP2_WARN(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
204#elif CONFIG_IEEE1394_SBP2_DEBUG == 1
205#define SBP2_DEBUG(fmt, args...) HPSB_DEBUG("sbp2: "fmt, ## args)
206#define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
207#define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args)
208#define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args)
209#else
210#define SBP2_DEBUG(fmt, args...)
211#define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
212#define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args)
213#define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args)
214#endif
215
216#define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
217
1da177e4
LT		 218/*
219 * Globals
220 */
221
222static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id,
223 u32 status);
224
225static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id,
226 u32 scsi_status, struct scsi_cmnd *SCpnt,
227 void (*done)(struct scsi_cmnd *));
228
229static struct scsi_host_template scsi_driver_template;
230
231static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC };
232
233static void sbp2_host_reset(struct hpsb_host *host);
234
235static int sbp2_probe(struct device *dev);
236static int sbp2_remove(struct device *dev);
237static int sbp2_update(struct unit_directory *ud);
238
239static struct hpsb_highlevel sbp2_highlevel = {
240 .name = SBP2_DEVICE_NAME,
241 .host_reset = sbp2_host_reset,
242};
243
244static struct hpsb_address_ops sbp2_ops = {
245 .write = sbp2_handle_status_write
246};
247
248#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
249static struct hpsb_address_ops sbp2_physdma_ops = {
a237f35f
SR		 250 .read = sbp2_handle_physdma_read,
251 .write = sbp2_handle_physdma_write,
1da177e4
LT		 252};
253#endif
254
255static struct hpsb_protocol_driver sbp2_driver = {
256 .name = "SBP2 Driver",
257 .id_table = sbp2_id_table,
258 .update = sbp2_update,
259 .driver = {
260 .name = SBP2_DEVICE_NAME,
261 .bus = &ieee1394_bus_type,
262 .probe = sbp2_probe,
263 .remove = sbp2_remove,
264 },
265};
266
a80614d1
SR		 267/*
268 * List of device firmwares that require the inquiry hack.
269 * Yields a few false positives but did not break other devices so far.
270 */
1da177e4 271static u32 sbp2_broken_inquiry_list[] = {
a80614d1 272 0x00002800, /* Stefan Richter <stefanr@s5r6.in-berlin.de> */
1da177e4
LT		 273 /* DViCO Momobay CX-1 */
274 0x00000200 /* Andreas Plesch <plesch@fas.harvard.edu> */
275 /* QPS Fire DVDBurner */
276};
277
1da177e4
LT		 278/**************************************
279 * General utility functions
280 **************************************/
281
1da177e4
LT		 282#ifndef __BIG_ENDIAN
283/*
284 * Converts a buffer from be32 to cpu byte ordering. Length is in bytes.
285 */
286static __inline__ void sbp2util_be32_to_cpu_buffer(void *buffer, int length)
287{
288 u32 *temp = buffer;
289
290 for (length = (length >> 2); length--; )
291 temp[length] = be32_to_cpu(temp[length]);
292
293 return;
294}
295
296/*
297 * Converts a buffer from cpu to be32 byte ordering. Length is in bytes.
298 */
299static __inline__ void sbp2util_cpu_to_be32_buffer(void *buffer, int length)
300{
301 u32 *temp = buffer;
302
303 for (length = (length >> 2); length--; )
304 temp[length] = cpu_to_be32(temp[length]);
305
306 return;
307}
308#else /* BIG_ENDIAN */
309/* Why waste the cpu cycles? */
310#define sbp2util_be32_to_cpu_buffer(x,y)
311#define sbp2util_cpu_to_be32_buffer(x,y)
312#endif
313
314#ifdef CONFIG_IEEE1394_SBP2_PACKET_DUMP
315/*
316 * Debug packet dump routine. Length is in bytes.
317 */
a237f35f
SR		 318static void sbp2util_packet_dump(void *buffer, int length, char *dump_name,
319 u32 dump_phys_addr)
1da177e4
LT		 320{
321 int i;
322 unsigned char *dump = buffer;
323
324 if (!dump || !length || !dump_name)
325 return;
326
327 if (dump_phys_addr)
328 printk("[%s, 0x%x]", dump_name, dump_phys_addr);
329 else
330 printk("[%s]", dump_name);
331 for (i = 0; i < length; i++) {
332 if (i > 0x3f) {
333 printk("\n ...");
334 break;
335 }
336 if ((i & 0x3) == 0)
337 printk(" ");
338 if ((i & 0xf) == 0)
339 printk("\n ");
a237f35f 340 printk("%02x ", (int)dump[i]);
1da177e4
LT		 341 }
342 printk("\n");
343
344 return;
345}
346#else
347#define sbp2util_packet_dump(w,x,y,z)
348#endif
349
350/*
351 * Goofy routine that basically does a down_timeout function.
352 */
353static int sbp2util_down_timeout(atomic_t *done, int timeout)
354{
355 int i;
356
357 for (i = timeout; (i > 0 && atomic_read(done) == 0); i-= HZ/10) {
358 if (msleep_interruptible(100)) /* 100ms */
a237f35f 359 return 1;
1da177e4 360 }
a237f35f 361 return (i > 0) ? 0 : 1;
1da177e4
LT		 362}
363
364/* Free's an allocated packet */
365static void sbp2_free_packet(struct hpsb_packet *packet)
366{
367 hpsb_free_tlabel(packet);
368 hpsb_free_packet(packet);
369}
370
371/* This is much like hpsb_node_write(), except it ignores the response
372 * subaction and returns immediately. Can be used from interrupts.
373 */
374static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr,
a237f35f 375 quadlet_t *buffer, size_t length)
1da177e4
LT		 376{
377 struct hpsb_packet *packet;
378
379 packet = hpsb_make_writepacket(ne->host, ne->nodeid,
380 addr, buffer, length);
a237f35f
SR		 381 if (!packet)
382 return -ENOMEM;
1da177e4 383
a237f35f
SR		 384 hpsb_set_packet_complete_task(packet,
385 (void (*)(void *))sbp2_free_packet,
1da177e4
LT		 386 packet);
387
388 hpsb_node_fill_packet(ne, packet);
389
a237f35f 390 if (hpsb_send_packet(packet) < 0) {
1da177e4
LT		 391 sbp2_free_packet(packet);
392 return -EIO;
393 }
394
395 return 0;
396}
397
398/*
399 * This function is called to create a pool of command orbs used for
400 * command processing. It is called when a new sbp2 device is detected.
401 */
402static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data *scsi_id)
403{
404 struct sbp2scsi_host_info *hi = scsi_id->hi;
405 int i;
406 unsigned long flags, orbs;
407 struct sbp2_command_info *command;
408
409 orbs = serialize_io ? 2 : SBP2_MAX_CMDS;
410
411 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
412 for (i = 0; i < orbs; i++) {
8551158a 413 command = kzalloc(sizeof(*command), GFP_ATOMIC);
1da177e4 414 if (!command) {
a237f35f
SR		 415 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock,
416 flags);
417 return -ENOMEM;
1da177e4 418 }
1da177e4 419 command->command_orb_dma =
a237f35f
SR		 420 pci_map_single(hi->host->pdev, &command->command_orb,
421 sizeof(struct sbp2_command_orb),
422 PCI_DMA_BIDIRECTIONAL);
1da177e4
LT		 423 SBP2_DMA_ALLOC("single command orb DMA");
424 command->sge_dma =
a237f35f
SR		 425 pci_map_single(hi->host->pdev,
426 &command->scatter_gather_element,
427 sizeof(command->scatter_gather_element),
428 PCI_DMA_BIDIRECTIONAL);
1da177e4
LT		 429 SBP2_DMA_ALLOC("scatter_gather_element");
430 INIT_LIST_HEAD(&command->list);
431 list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed);
432 }
433 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
434 return 0;
435}
436
437/*
438 * This function is called to delete a pool of command orbs.
439 */
440static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data *scsi_id)
441{
442 struct hpsb_host *host = scsi_id->hi->host;
443 struct list_head *lh, *next;
444 struct sbp2_command_info *command;
445 unsigned long flags;
446
447 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
448 if (!list_empty(&scsi_id->sbp2_command_orb_completed)) {
449 list_for_each_safe(lh, next, &scsi_id->sbp2_command_orb_completed) {
450 command = list_entry(lh, struct sbp2_command_info, list);
451
452 /* Release our generic DMA's */
453 pci_unmap_single(host->pdev, command->command_orb_dma,
454 sizeof(struct sbp2_command_orb),
455 PCI_DMA_BIDIRECTIONAL);
456 SBP2_DMA_FREE("single command orb DMA");
457 pci_unmap_single(host->pdev, command->sge_dma,
458 sizeof(command->scatter_gather_element),
459 PCI_DMA_BIDIRECTIONAL);
460 SBP2_DMA_FREE("scatter_gather_element");
461
462 kfree(command);
463 }
464 }
465 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
466 return;
467}
468
469/*
470 * This function finds the sbp2_command for a given outstanding command
471 * orb.Only looks at the inuse list.
472 */
473static struct sbp2_command_info *sbp2util_find_command_for_orb(
474 struct scsi_id_instance_data *scsi_id, dma_addr_t orb)
475{
476 struct sbp2_command_info *command;
477 unsigned long flags;
478
479 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
480 if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) {
481 list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) {
482 if (command->command_orb_dma == orb) {
483 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
a237f35f 484 return command;
1da177e4
LT		 485 }
486 }
487 }
488 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
489
490 SBP2_ORB_DEBUG("could not match command orb %x", (unsigned int)orb);
491
a237f35f 492 return NULL;
1da177e4
LT		 493}
494
495/*
496 * This function finds the sbp2_command for a given outstanding SCpnt.
497 * Only looks at the inuse list.
498 */
499static struct sbp2_command_info *sbp2util_find_command_for_SCpnt(struct scsi_id_instance_data *scsi_id, void *SCpnt)
500{
501 struct sbp2_command_info *command;
502 unsigned long flags;
503
504 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
505 if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) {
506 list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) {
507 if (command->Current_SCpnt == SCpnt) {
508 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
a237f35f 509 return command;
1da177e4
LT		 510 }
511 }
512 }
513 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
a237f35f 514 return NULL;
1da177e4
LT		 515}
516
517/*
518 * This function allocates a command orb used to send a scsi command.
519 */
520static struct sbp2_command_info *sbp2util_allocate_command_orb(
521 struct scsi_id_instance_data *scsi_id,
522 struct scsi_cmnd *Current_SCpnt,
523 void (*Current_done)(struct scsi_cmnd *))
524{
525 struct list_head *lh;
526 struct sbp2_command_info *command = NULL;
527 unsigned long flags;
528
529 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
530 if (!list_empty(&scsi_id->sbp2_command_orb_completed)) {
531 lh = scsi_id->sbp2_command_orb_completed.next;
532 list_del(lh);
533 command = list_entry(lh, struct sbp2_command_info, list);
534 command->Current_done = Current_done;
535 command->Current_SCpnt = Current_SCpnt;
536 list_add_tail(&command->list, &scsi_id->sbp2_command_orb_inuse);
537 } else {
538 SBP2_ERR("sbp2util_allocate_command_orb - No orbs available!");
539 }
540 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
a237f35f 541 return command;
1da177e4
LT		 542}
543
544/* Free our DMA's */
545static void sbp2util_free_command_dma(struct sbp2_command_info *command)
546{
547 struct scsi_id_instance_data *scsi_id =
548 (struct scsi_id_instance_data *)command->Current_SCpnt->device->host->hostdata[0];
549 struct hpsb_host *host;
550
551 if (!scsi_id) {
552 printk(KERN_ERR "%s: scsi_id == NULL\n", __FUNCTION__);
553 return;
554 }
555
556 host = scsi_id->ud->ne->host;
557
558 if (command->cmd_dma) {
559 if (command->dma_type == CMD_DMA_SINGLE) {
560 pci_unmap_single(host->pdev, command->cmd_dma,
561 command->dma_size, command->dma_dir);
562 SBP2_DMA_FREE("single bulk");
563 } else if (command->dma_type == CMD_DMA_PAGE) {
564 pci_unmap_page(host->pdev, command->cmd_dma,
565 command->dma_size, command->dma_dir);
566 SBP2_DMA_FREE("single page");
567 } /* XXX: Check for CMD_DMA_NONE bug */
568 command->dma_type = CMD_DMA_NONE;
569 command->cmd_dma = 0;
570 }
571
572 if (command->sge_buffer) {
573 pci_unmap_sg(host->pdev, command->sge_buffer,
574 command->dma_size, command->dma_dir);
575 SBP2_DMA_FREE("scatter list");
576 command->sge_buffer = NULL;
577 }
578}
579
580/*
581 * This function moves a command to the completed orb list.
582 */
a237f35f
SR		 583static void sbp2util_mark_command_completed(struct scsi_id_instance_data *scsi_id,
584 struct sbp2_command_info *command)
1da177e4
LT		 585{
586 unsigned long flags;
587
588 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
589 list_del(&command->list);
590 sbp2util_free_command_dma(command);
591 list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed);
592 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
593}
594
abd559b1
JM		 595/*
596 * Is scsi_id valid? Is the 1394 node still present?
597 */
598static inline int sbp2util_node_is_available(struct scsi_id_instance_data *scsi_id)
599{
600 return scsi_id && scsi_id->ne && !scsi_id->ne->in_limbo;
601}
602
1da177e4
LT		 603/*********************************************
604 * IEEE-1394 core driver stack related section
605 *********************************************/
606static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud);
607
608static int sbp2_probe(struct device *dev)
609{
610 struct unit_directory *ud;
611 struct scsi_id_instance_data *scsi_id;
612
613 SBP2_DEBUG("sbp2_probe");
614
615 ud = container_of(dev, struct unit_directory, device);
616
617 /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s)
618 * instead. */
619 if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY)
620 return -ENODEV;
621
a237f35f 622 scsi_id = sbp2_alloc_device(ud);
1da177e4 623
a237f35f
SR		 624 if (!scsi_id)
625 return -ENOMEM;
1da177e4 626
a237f35f 627 sbp2_parse_unit_directory(scsi_id, ud);
1da177e4 628
a237f35f 629 return sbp2_start_device(scsi_id);
1da177e4
LT		 630}
631
632static int sbp2_remove(struct device *dev)
633{
634 struct unit_directory *ud;
635 struct scsi_id_instance_data *scsi_id;
abd559b1 636 struct scsi_device *sdev;
1da177e4
LT		 637
638 SBP2_DEBUG("sbp2_remove");
639
640 ud = container_of(dev, struct unit_directory, device);
641 scsi_id = ud->device.driver_data;
abd559b1
JM		 642 if (!scsi_id)
643 return 0;
644
bf637ec3
SR		 645 if (scsi_id->scsi_host) {
646 /* Get rid of enqueued commands if there is no chance to
647 * send them. */
648 if (!sbp2util_node_is_available(scsi_id))
649 sbp2scsi_complete_all_commands(scsi_id, DID_NO_CONNECT);
650 /* scsi_remove_device() will trigger shutdown functions of SCSI
651 * highlevel drivers which would deadlock if blocked. */
abd559b1 652 scsi_unblock_requests(scsi_id->scsi_host);
bf637ec3 653 }
abd559b1
JM		 654 sdev = scsi_id->sdev;
655 if (sdev) {
656 scsi_id->sdev = NULL;
657 scsi_remove_device(sdev);
658 }
1da177e4
LT		 659
660 sbp2_logout_device(scsi_id);
661 sbp2_remove_device(scsi_id);
662
663 return 0;
664}
665
666static int sbp2_update(struct unit_directory *ud)
667{
668 struct scsi_id_instance_data *scsi_id = ud->device.driver_data;
669
670 SBP2_DEBUG("sbp2_update");
671
672 if (sbp2_reconnect_device(scsi_id)) {
673
674 /*
675 * Ok, reconnect has failed. Perhaps we didn't
676 * reconnect fast enough. Try doing a regular login, but
677 * first do a logout just in case of any weirdness.
678 */
679 sbp2_logout_device(scsi_id);
680
681 if (sbp2_login_device(scsi_id)) {
682 /* Login failed too, just fail, and the backend
683 * will call our sbp2_remove for us */
684 SBP2_ERR("Failed to reconnect to sbp2 device!");
685 return -EBUSY;
686 }
687 }
688
689 /* Set max retries to something large on the device. */
690 sbp2_set_busy_timeout(scsi_id);
691
692 /* Do a SBP-2 fetch agent reset. */
693 sbp2_agent_reset(scsi_id, 1);
694
695 /* Get the max speed and packet size that we can use. */
696 sbp2_max_speed_and_size(scsi_id);
697
698 /* Complete any pending commands with busy (so they get
699 * retried) and remove them from our queue
700 */
701 sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY);
702
703 /* Make sure we unblock requests (since this is likely after a bus
704 * reset). */
705 scsi_unblock_requests(scsi_id->scsi_host);
706
707 return 0;
708}
709
710/* This functions is called by the sbp2_probe, for each new device. We now
711 * allocate one scsi host for each scsi_id (unit directory). */
712static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud)
713{
714 struct sbp2scsi_host_info *hi;
715 struct Scsi_Host *scsi_host = NULL;
716 struct scsi_id_instance_data *scsi_id = NULL;
717
718 SBP2_DEBUG("sbp2_alloc_device");
719
8551158a 720 scsi_id = kzalloc(sizeof(*scsi_id), GFP_KERNEL);
1da177e4
LT		 721 if (!scsi_id) {
722 SBP2_ERR("failed to create scsi_id");
723 goto failed_alloc;
724 }
1da177e4
LT		 725
726 scsi_id->ne = ud->ne;
727 scsi_id->ud = ud;
728 scsi_id->speed_code = IEEE1394_SPEED_100;
729 scsi_id->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100];
730 atomic_set(&scsi_id->sbp2_login_complete, 0);
731 INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_inuse);
732 INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_completed);
733 INIT_LIST_HEAD(&scsi_id->scsi_list);
734 spin_lock_init(&scsi_id->sbp2_command_orb_lock);
e309fc6d 735 scsi_id->sbp2_lun = 0;
1da177e4
LT		 736
737 ud->device.driver_data = scsi_id;
738
739 hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host);
740 if (!hi) {
741 hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host, sizeof(*hi));
742 if (!hi) {
743 SBP2_ERR("failed to allocate hostinfo");
744 goto failed_alloc;
745 }
746 SBP2_DEBUG("sbp2_alloc_device: allocated hostinfo");
747 hi->host = ud->ne->host;
748 INIT_LIST_HEAD(&hi->scsi_ids);
749
1da177e4
LT		 750#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
751 /* Handle data movement if physical dma is not
752 * enabled/supportedon host controller */
753 hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, &sbp2_physdma_ops,
754 0x0ULL, 0xfffffffcULL);
755#endif
756 }
757
147830f2
SR		 758 /* Prevent unloading of the 1394 host */
759 if (!try_module_get(hi->host->driver->owner)) {
760 SBP2_ERR("failed to get a reference on 1394 host driver");
761 goto failed_alloc;
762 }
763
1da177e4
LT		 764 scsi_id->hi = hi;
765
766 list_add_tail(&scsi_id->scsi_list, &hi->scsi_ids);
767
35bdddb8
SR		 768 /* Register the status FIFO address range. We could use the same FIFO
769 * for targets at different nodes. However we need different FIFOs per
770 * target in order to support multi-unit devices. */
771 scsi_id->status_fifo_addr = hpsb_allocate_and_register_addrspace(
772 &sbp2_highlevel, ud->ne->host, &sbp2_ops,
773 sizeof(struct sbp2_status_block), sizeof(quadlet_t),
774 ~0ULL, ~0ULL);
775 if (!scsi_id->status_fifo_addr) {
776 SBP2_ERR("failed to allocate status FIFO address range");
777 goto failed_alloc;
778 }
779
1da177e4 780 /* Register our host with the SCSI stack. */
a2ef79e1 781 scsi_host = scsi_host_alloc(&scsi_driver_template,
a237f35f 782 sizeof(unsigned long));
1da177e4
LT		 783 if (!scsi_host) {
784 SBP2_ERR("failed to register scsi host");
785 goto failed_alloc;
786 }
787
788 scsi_host->hostdata[0] = (unsigned long)scsi_id;
789
790 if (!scsi_add_host(scsi_host, &ud->device)) {
791 scsi_id->scsi_host = scsi_host;
792 return scsi_id;
793 }
794
795 SBP2_ERR("failed to add scsi host");
796 scsi_host_put(scsi_host);
797
798failed_alloc:
799 sbp2_remove_device(scsi_id);
800 return NULL;
801}
802
1da177e4
LT		 803static void sbp2_host_reset(struct hpsb_host *host)
804{
805 struct sbp2scsi_host_info *hi;
806 struct scsi_id_instance_data *scsi_id;
807
808 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
809
810 if (hi) {
811 list_for_each_entry(scsi_id, &hi->scsi_ids, scsi_list)
812 scsi_block_requests(scsi_id->scsi_host);
813 }
814}
815
1da177e4
LT		 816/*
817 * This function is where we first pull the node unique ids, and then
818 * allocate memory and register a SBP-2 device.
819 */
820static int sbp2_start_device(struct scsi_id_instance_data *scsi_id)
821{
822 struct sbp2scsi_host_info *hi = scsi_id->hi;
146f7262 823 int error;
1da177e4
LT		 824
825 SBP2_DEBUG("sbp2_start_device");
826
827 /* Login FIFO DMA */
828 scsi_id->login_response =
a237f35f
SR		 829 pci_alloc_consistent(hi->host->pdev,
830 sizeof(struct sbp2_login_response),
1da177e4
LT		 831 &scsi_id->login_response_dma);
832 if (!scsi_id->login_response)
833 goto alloc_fail;
834 SBP2_DMA_ALLOC("consistent DMA region for login FIFO");
835
836 /* Query logins ORB DMA */
837 scsi_id->query_logins_orb =
a237f35f
SR		 838 pci_alloc_consistent(hi->host->pdev,
839 sizeof(struct sbp2_query_logins_orb),
1da177e4
LT		 840 &scsi_id->query_logins_orb_dma);
841 if (!scsi_id->query_logins_orb)
842 goto alloc_fail;
843 SBP2_DMA_ALLOC("consistent DMA region for query logins ORB");
844
845 /* Query logins response DMA */
846 scsi_id->query_logins_response =
a237f35f
SR		 847 pci_alloc_consistent(hi->host->pdev,
848 sizeof(struct sbp2_query_logins_response),
1da177e4
LT		 849 &scsi_id->query_logins_response_dma);
850 if (!scsi_id->query_logins_response)
851 goto alloc_fail;
852 SBP2_DMA_ALLOC("consistent DMA region for query logins response");
853
854 /* Reconnect ORB DMA */
855 scsi_id->reconnect_orb =
a237f35f
SR		 856 pci_alloc_consistent(hi->host->pdev,
857 sizeof(struct sbp2_reconnect_orb),
1da177e4
LT		 858 &scsi_id->reconnect_orb_dma);
859 if (!scsi_id->reconnect_orb)
860 goto alloc_fail;
861 SBP2_DMA_ALLOC("consistent DMA region for reconnect ORB");
862
863 /* Logout ORB DMA */
864 scsi_id->logout_orb =
a237f35f
SR		 865 pci_alloc_consistent(hi->host->pdev,
866 sizeof(struct sbp2_logout_orb),
1da177e4
LT		 867 &scsi_id->logout_orb_dma);
868 if (!scsi_id->logout_orb)
869 goto alloc_fail;
870 SBP2_DMA_ALLOC("consistent DMA region for logout ORB");
871
872 /* Login ORB DMA */
873 scsi_id->login_orb =
a237f35f
SR		 874 pci_alloc_consistent(hi->host->pdev,
875 sizeof(struct sbp2_login_orb),
1da177e4 876 &scsi_id->login_orb_dma);
eaceec7f
SR		 877 if (!scsi_id->login_orb)
878 goto alloc_fail;
1da177e4
LT		 879 SBP2_DMA_ALLOC("consistent DMA region for login ORB");
880
881 SBP2_DEBUG("New SBP-2 device inserted, SCSI ID = %x", scsi_id->ud->id);
882
883 /*
884 * Create our command orb pool
885 */
886 if (sbp2util_create_command_orb_pool(scsi_id)) {
887 SBP2_ERR("sbp2util_create_command_orb_pool failed!");
888 sbp2_remove_device(scsi_id);
889 return -ENOMEM;
890 }
891
892 /* Schedule a timeout here. The reason is that we may be so close
893 * to a bus reset, that the device is not available for logins.
894 * This can happen when the bus reset is caused by the host
895 * connected to the sbp2 device being removed. That host would
896 * have a certain amount of time to relogin before the sbp2 device
897 * allows someone else to login instead. One second makes sense. */
898 msleep_interruptible(1000);
899 if (signal_pending(current)) {
900 SBP2_WARN("aborting sbp2_start_device due to event");
901 sbp2_remove_device(scsi_id);
902 return -EINTR;
903 }
a237f35f 904
1da177e4
LT		 905 /*
906 * Login to the sbp-2 device
907 */
908 if (sbp2_login_device(scsi_id)) {
909 /* Login failed, just remove the device. */
910 sbp2_remove_device(scsi_id);
911 return -EBUSY;
912 }
913
914 /*
915 * Set max retries to something large on the device
916 */
917 sbp2_set_busy_timeout(scsi_id);
918
919 /*
920 * Do a SBP-2 fetch agent reset
921 */
922 sbp2_agent_reset(scsi_id, 1);
923
924 /*
925 * Get the max speed and packet size that we can use
926 */
927 sbp2_max_speed_and_size(scsi_id);
928
929 /* Add this device to the scsi layer now */
146f7262
JB		 930 error = scsi_add_device(scsi_id->scsi_host, 0, scsi_id->ud->id, 0);
931 if (error) {
1da177e4 932 SBP2_ERR("scsi_add_device failed");
dc3edd54
SR		 933 sbp2_logout_device(scsi_id);
934 sbp2_remove_device(scsi_id);
146f7262 935 return error;
1da177e4
LT		 936 }
937
938 return 0;
eaceec7f
SR		 939
940alloc_fail:
941 SBP2_ERR("Could not allocate memory for scsi_id");
942 sbp2_remove_device(scsi_id);
943 return -ENOMEM;
1da177e4
LT		 944}
945
946/*
947 * This function removes an sbp2 device from the sbp2scsi_host_info struct.
948 */
949static void sbp2_remove_device(struct scsi_id_instance_data *scsi_id)
950{
951 struct sbp2scsi_host_info *hi;
952
953 SBP2_DEBUG("sbp2_remove_device");
954
955 if (!scsi_id)
956 return;
957
958 hi = scsi_id->hi;
959
960 /* This will remove our scsi device aswell */
961 if (scsi_id->scsi_host) {
962 scsi_remove_host(scsi_id->scsi_host);
963 scsi_host_put(scsi_id->scsi_host);
964 }
965
966 sbp2util_remove_command_orb_pool(scsi_id);
967
968 list_del(&scsi_id->scsi_list);
969
970 if (scsi_id->login_response) {
971 pci_free_consistent(hi->host->pdev,
972 sizeof(struct sbp2_login_response),
973 scsi_id->login_response,
974 scsi_id->login_response_dma);
975 SBP2_DMA_FREE("single login FIFO");
976 }
977
978 if (scsi_id->login_orb) {
979 pci_free_consistent(hi->host->pdev,
980 sizeof(struct sbp2_login_orb),
981 scsi_id->login_orb,
982 scsi_id->login_orb_dma);
983 SBP2_DMA_FREE("single login ORB");
984 }
985
986 if (scsi_id->reconnect_orb) {
987 pci_free_consistent(hi->host->pdev,
988 sizeof(struct sbp2_reconnect_orb),
989 scsi_id->reconnect_orb,
990 scsi_id->reconnect_orb_dma);
991 SBP2_DMA_FREE("single reconnect orb");
992 }
993
994 if (scsi_id->logout_orb) {
995 pci_free_consistent(hi->host->pdev,
996 sizeof(struct sbp2_logout_orb),
997 scsi_id->logout_orb,
998 scsi_id->logout_orb_dma);
999 SBP2_DMA_FREE("single logout orb");
1000 }
1001
1002 if (scsi_id->query_logins_orb) {
1003 pci_free_consistent(hi->host->pdev,
1004 sizeof(struct sbp2_query_logins_orb),
1005 scsi_id->query_logins_orb,
1006 scsi_id->query_logins_orb_dma);
1007 SBP2_DMA_FREE("single query logins orb");
1008 }
1009
1010 if (scsi_id->query_logins_response) {
1011 pci_free_consistent(hi->host->pdev,
1012 sizeof(struct sbp2_query_logins_response),
1013 scsi_id->query_logins_response,
1014 scsi_id->query_logins_response_dma);
1015 SBP2_DMA_FREE("single query logins data");
1016 }
1017
35bdddb8
SR		 1018 if (scsi_id->status_fifo_addr)
1019 hpsb_unregister_addrspace(&sbp2_highlevel, hi->host,
1020 scsi_id->status_fifo_addr);
1021
1da177e4
LT		 1022 scsi_id->ud->device.driver_data = NULL;
1023
147830f2
SR		 1024 if (hi)
1025 module_put(hi->host->driver->owner);
1026
1da177e4
LT		 1027 SBP2_DEBUG("SBP-2 device removed, SCSI ID = %d", scsi_id->ud->id);
1028
1029 kfree(scsi_id);
1030}
1031
1032#ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
1033/*
1034 * This function deals with physical dma write requests (for adapters that do not support
1035 * physical dma in hardware). Mostly just here for debugging...
1036 */
a237f35f
SR		 1037static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid,
1038 int destid, quadlet_t *data, u64 addr,
1039 size_t length, u16 flags)
1da177e4
LT		 1040{
1041
a237f35f
SR		 1042 /*
1043 * Manually put the data in the right place.
1044 */
1045 memcpy(bus_to_virt((u32) addr), data, length);
1046 sbp2util_packet_dump(data, length, "sbp2 phys dma write by device",
1047 (u32) addr);
1048 return RCODE_COMPLETE;
1da177e4
LT		 1049}
1050
1051/*
1052 * This function deals with physical dma read requests (for adapters that do not support
1053 * physical dma in hardware). Mostly just here for debugging...
1054 */
a237f35f
SR		 1055static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid,
1056 quadlet_t *data, u64 addr, size_t length,
1057 u16 flags)
1da177e4
LT		 1058{
1059
a237f35f
SR		 1060 /*
1061 * Grab data from memory and send a read response.
1062 */
1063 memcpy(data, bus_to_virt((u32) addr), length);
1064 sbp2util_packet_dump(data, length, "sbp2 phys dma read by device",
1065 (u32) addr);
1066 return RCODE_COMPLETE;
1da177e4
LT		 1067}
1068#endif
1069
1da177e4
LT		 1070/**************************************
1071 * SBP-2 protocol related section
1072 **************************************/
1073
1da177e4
LT		 1074/*
1075 * This function queries the device for the maximum concurrent logins it
1076 * supports.
1077 */
1078static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id)
1079{
1080 struct sbp2scsi_host_info *hi = scsi_id->hi;
1081 quadlet_t data[2];
1082 int max_logins;
1083 int active_logins;
1084
1085 SBP2_DEBUG("sbp2_query_logins");
1086
1087 scsi_id->query_logins_orb->reserved1 = 0x0;
1088 scsi_id->query_logins_orb->reserved2 = 0x0;
1089
1090 scsi_id->query_logins_orb->query_response_lo = scsi_id->query_logins_response_dma;
1091 scsi_id->query_logins_orb->query_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
1092 SBP2_DEBUG("sbp2_query_logins: query_response_hi/lo initialized");
1093
1094 scsi_id->query_logins_orb->lun_misc = ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST);
1095 scsi_id->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1);
e309fc6d 1096 scsi_id->query_logins_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_lun);
1da177e4
LT		 1097 SBP2_DEBUG("sbp2_query_logins: lun_misc initialized");
1098
1099 scsi_id->query_logins_orb->reserved_resp_length =
1100 ORB_SET_QUERY_LOGINS_RESP_LENGTH(sizeof(struct sbp2_query_logins_response));
1101 SBP2_DEBUG("sbp2_query_logins: reserved_resp_length initialized");
1102
35bdddb8
SR		 1103 scsi_id->query_logins_orb->status_fifo_hi =
1104 ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
1105 scsi_id->query_logins_orb->status_fifo_lo =
1106 ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr);
1da177e4
LT		 1107
1108 sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb));
1109
1110 SBP2_DEBUG("sbp2_query_logins: orb byte-swapped");
1111
1112 sbp2util_packet_dump(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb),
1113 "sbp2 query logins orb", scsi_id->query_logins_orb_dma);
1114
1115 memset(scsi_id->query_logins_response, 0, sizeof(struct sbp2_query_logins_response));
1116 memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
1117
1118 SBP2_DEBUG("sbp2_query_logins: query_logins_response/status FIFO memset");
1119
1120 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1121 data[1] = scsi_id->query_logins_orb_dma;
1122 sbp2util_cpu_to_be32_buffer(data, 8);
1123
1124 atomic_set(&scsi_id->sbp2_login_complete, 0);
1125
1126 SBP2_DEBUG("sbp2_query_logins: prepared to write");
1127 hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8);
1128 SBP2_DEBUG("sbp2_query_logins: written");
1129
1130 if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 2*HZ)) {
1131 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
a237f35f 1132 return -EIO;
1da177e4
LT		 1133 }
1134
1135 if (scsi_id->status_block.ORB_offset_lo != scsi_id->query_logins_orb_dma) {
1136 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
a237f35f 1137 return -EIO;
1da177e4
LT		 1138 }
1139
1140 if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
1141 STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
1142 STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
1143
1144 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
a237f35f 1145 return -EIO;
1da177e4
LT		 1146 }
1147
1148 sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_response, sizeof(struct sbp2_query_logins_response));
1149
1150 SBP2_DEBUG("length_max_logins = %x",
1151 (unsigned int)scsi_id->query_logins_response->length_max_logins);
1152
1153 SBP2_DEBUG("Query logins to SBP-2 device successful");
1154
1155 max_logins = RESPONSE_GET_MAX_LOGINS(scsi_id->query_logins_response->length_max_logins);
1156 SBP2_DEBUG("Maximum concurrent logins supported: %d", max_logins);
1157
1158 active_logins = RESPONSE_GET_ACTIVE_LOGINS(scsi_id->query_logins_response->length_max_logins);
1159 SBP2_DEBUG("Number of active logins: %d", active_logins);
1160
1161 if (active_logins >= max_logins) {
a237f35f 1162 return -EIO;
1da177e4
LT		 1163 }
1164
1165 return 0;
1166}
1167
1168/*
1169 * This function is called in order to login to a particular SBP-2 device,
1170 * after a bus reset.
1171 */
1172static int sbp2_login_device(struct scsi_id_instance_data *scsi_id)
1173{
1174 struct sbp2scsi_host_info *hi = scsi_id->hi;
1175 quadlet_t data[2];
1176
1177 SBP2_DEBUG("sbp2_login_device");
1178
1179 if (!scsi_id->login_orb) {
1180 SBP2_DEBUG("sbp2_login_device: login_orb not alloc'd!");
a237f35f 1181 return -EIO;
1da177e4
LT		 1182 }
1183
1184 if (!exclusive_login) {
1185 if (sbp2_query_logins(scsi_id)) {
1186 SBP2_INFO("Device does not support any more concurrent logins");
a237f35f 1187 return -EIO;
1da177e4
LT		 1188 }
1189 }
1190
1191 /* Set-up login ORB, assume no password */
1192 scsi_id->login_orb->password_hi = 0;
1193 scsi_id->login_orb->password_lo = 0;
1194 SBP2_DEBUG("sbp2_login_device: password_hi/lo initialized");
1195
1196 scsi_id->login_orb->login_response_lo = scsi_id->login_response_dma;
1197 scsi_id->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
1198 SBP2_DEBUG("sbp2_login_device: login_response_hi/lo initialized");
1199
1200 scsi_id->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST);
1201 scsi_id->login_orb->lun_misc |= ORB_SET_RECONNECT(0); /* One second reconnect time */
1202 scsi_id->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(exclusive_login); /* Exclusive access to device */
1203 scsi_id->login_orb->lun_misc |= ORB_SET_NOTIFY(1); /* Notify us of login complete */
e309fc6d 1204 scsi_id->login_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_lun);
1da177e4
LT		 1205 SBP2_DEBUG("sbp2_login_device: lun_misc initialized");
1206
1207 scsi_id->login_orb->passwd_resp_lengths =
1208 ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response));
1209 SBP2_DEBUG("sbp2_login_device: passwd_resp_lengths initialized");
1210
35bdddb8
SR		 1211 scsi_id->login_orb->status_fifo_hi =
1212 ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
1213 scsi_id->login_orb->status_fifo_lo =
1214 ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr);
1da177e4
LT		 1215
1216 /*
1217 * Byte swap ORB if necessary
1218 */
1219 sbp2util_cpu_to_be32_buffer(scsi_id->login_orb, sizeof(struct sbp2_login_orb));
1220
1221 SBP2_DEBUG("sbp2_login_device: orb byte-swapped");
1222
1223 sbp2util_packet_dump(scsi_id->login_orb, sizeof(struct sbp2_login_orb),
1224 "sbp2 login orb", scsi_id->login_orb_dma);
1225
1226 /*
1227 * Initialize login response and status fifo
1228 */
1229 memset(scsi_id->login_response, 0, sizeof(struct sbp2_login_response));
1230 memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
1231
1232 SBP2_DEBUG("sbp2_login_device: login_response/status FIFO memset");
1233
1234 /*
1235 * Ok, let's write to the target's management agent register
1236 */
1237 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1238 data[1] = scsi_id->login_orb_dma;
1239 sbp2util_cpu_to_be32_buffer(data, 8);
1240
1241 atomic_set(&scsi_id->sbp2_login_complete, 0);
1242
1243 SBP2_DEBUG("sbp2_login_device: prepared to write to %08x",
1244 (unsigned int)scsi_id->sbp2_management_agent_addr);
1245 hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8);
1246 SBP2_DEBUG("sbp2_login_device: written");
1247
1248 /*
1249 * Wait for login status (up to 20 seconds)...
1250 */
1251 if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 20*HZ)) {
1252 SBP2_ERR("Error logging into SBP-2 device - login timed-out");
a237f35f 1253 return -EIO;
1da177e4
LT		 1254 }
1255
1256 /*
1257 * Sanity. Make sure status returned matches login orb.
1258 */
1259 if (scsi_id->status_block.ORB_offset_lo != scsi_id->login_orb_dma) {
1260 SBP2_ERR("Error logging into SBP-2 device - login timed-out");
a237f35f 1261 return -EIO;
1da177e4
LT		 1262 }
1263
1264 /*
1265 * Check status
1266 */
1267 if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
1268 STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
1269 STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
1270
1271 SBP2_ERR("Error logging into SBP-2 device - login failed");
a237f35f 1272 return -EIO;
1da177e4
LT		 1273 }
1274
1275 /*
1276 * Byte swap the login response, for use when reconnecting or
1277 * logging out.
1278 */
1279 sbp2util_cpu_to_be32_buffer(scsi_id->login_response, sizeof(struct sbp2_login_response));
1280
1281 /*
1282 * Grab our command block agent address from the login response.
1283 */
1284 SBP2_DEBUG("command_block_agent_hi = %x",
1285 (unsigned int)scsi_id->login_response->command_block_agent_hi);
1286 SBP2_DEBUG("command_block_agent_lo = %x",
1287 (unsigned int)scsi_id->login_response->command_block_agent_lo);
1288
1289 scsi_id->sbp2_command_block_agent_addr =
1290 ((u64)scsi_id->login_response->command_block_agent_hi) << 32;
1291 scsi_id->sbp2_command_block_agent_addr |= ((u64)scsi_id->login_response->command_block_agent_lo);
1292 scsi_id->sbp2_command_block_agent_addr &= 0x0000ffffffffffffULL;
1293
1294 SBP2_INFO("Logged into SBP-2 device");
1295
a237f35f 1296 return 0;
1da177e4
LT		 1297
1298}
1299
1300/*
1301 * This function is called in order to logout from a particular SBP-2
1302 * device, usually called during driver unload.
1303 */
1304static int sbp2_logout_device(struct scsi_id_instance_data *scsi_id)
1305{
1306 struct sbp2scsi_host_info *hi = scsi_id->hi;
1307 quadlet_t data[2];
1308 int error;
1309
1310 SBP2_DEBUG("sbp2_logout_device");
1311
1312 /*
1313 * Set-up logout ORB
1314 */
1315 scsi_id->logout_orb->reserved1 = 0x0;
1316 scsi_id->logout_orb->reserved2 = 0x0;
1317 scsi_id->logout_orb->reserved3 = 0x0;
1318 scsi_id->logout_orb->reserved4 = 0x0;
1319
1320 scsi_id->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST);
1321 scsi_id->logout_orb->login_ID_misc |= ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID);
1322
1323 /* Notify us when complete */
1324 scsi_id->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1325
1326 scsi_id->logout_orb->reserved5 = 0x0;
35bdddb8
SR		 1327 scsi_id->logout_orb->status_fifo_hi =
1328 ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
1329 scsi_id->logout_orb->status_fifo_lo =
1330 ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr);
1da177e4
LT		 1331
1332 /*
1333 * Byte swap ORB if necessary
1334 */
1335 sbp2util_cpu_to_be32_buffer(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb));
1336
1337 sbp2util_packet_dump(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb),
1338 "sbp2 logout orb", scsi_id->logout_orb_dma);
1339
1340 /*
1341 * Ok, let's write to the target's management agent register
1342 */
1343 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1344 data[1] = scsi_id->logout_orb_dma;
1345 sbp2util_cpu_to_be32_buffer(data, 8);
1346
1347 atomic_set(&scsi_id->sbp2_login_complete, 0);
1348
1349 error = hpsb_node_write(scsi_id->ne,
a237f35f 1350 scsi_id->sbp2_management_agent_addr, data, 8);
1da177e4
LT		 1351 if (error)
1352 return error;
1353
1354 /* Wait for device to logout...1 second. */
1355 if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ))
1356 return -EIO;
1357
1358 SBP2_INFO("Logged out of SBP-2 device");
1359
a237f35f 1360 return 0;
1da177e4
LT		 1361
1362}
1363
1364/*
1365 * This function is called in order to reconnect to a particular SBP-2
1366 * device, after a bus reset.
1367 */
1368static int sbp2_reconnect_device(struct scsi_id_instance_data *scsi_id)
1369{
1370 struct sbp2scsi_host_info *hi = scsi_id->hi;
1371 quadlet_t data[2];
1372 int error;
1373
1374 SBP2_DEBUG("sbp2_reconnect_device");
1375
1376 /*
1377 * Set-up reconnect ORB
1378 */
1379 scsi_id->reconnect_orb->reserved1 = 0x0;
1380 scsi_id->reconnect_orb->reserved2 = 0x0;
1381 scsi_id->reconnect_orb->reserved3 = 0x0;
1382 scsi_id->reconnect_orb->reserved4 = 0x0;
1383
1384 scsi_id->reconnect_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST);
1385 scsi_id->reconnect_orb->login_ID_misc |=
1386 ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID);
1387
1388 /* Notify us when complete */
1389 scsi_id->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1390
1391 scsi_id->reconnect_orb->reserved5 = 0x0;
35bdddb8
SR		 1392 scsi_id->reconnect_orb->status_fifo_hi =
1393 ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
1394 scsi_id->reconnect_orb->status_fifo_lo =
1395 ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr);
1da177e4
LT		 1396
1397 /*
1398 * Byte swap ORB if necessary
1399 */
1400 sbp2util_cpu_to_be32_buffer(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb));
1401
1402 sbp2util_packet_dump(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb),
1403 "sbp2 reconnect orb", scsi_id->reconnect_orb_dma);
1404
1405 /*
1406 * Initialize status fifo
1407 */
1408 memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
1409
1410 /*
1411 * Ok, let's write to the target's management agent register
1412 */
1413 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1414 data[1] = scsi_id->reconnect_orb_dma;
1415 sbp2util_cpu_to_be32_buffer(data, 8);
1416
1417 atomic_set(&scsi_id->sbp2_login_complete, 0);
1418
1419 error = hpsb_node_write(scsi_id->ne,
a237f35f 1420 scsi_id->sbp2_management_agent_addr, data, 8);
1da177e4
LT		 1421 if (error)
1422 return error;
1423
1424 /*
1425 * Wait for reconnect status (up to 1 second)...
1426 */
1427 if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ)) {
1428 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out");
a237f35f 1429 return -EIO;
1da177e4
LT		 1430 }
1431
1432 /*
1433 * Sanity. Make sure status returned matches reconnect orb.
1434 */
1435 if (scsi_id->status_block.ORB_offset_lo != scsi_id->reconnect_orb_dma) {
1436 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out");
a237f35f 1437 return -EIO;
1da177e4
LT		 1438 }
1439
1440 /*
1441 * Check status
1442 */
1443 if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
1444 STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
1445 STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
1446
1447 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect failed");
a237f35f 1448 return -EIO;
1da177e4
LT		 1449 }
1450
1451 HPSB_DEBUG("Reconnected to SBP-2 device");
1452
a237f35f 1453 return 0;
1da177e4
LT		 1454
1455}
1456
1457/*
1458 * This function is called in order to set the busy timeout (number of
1459 * retries to attempt) on the sbp2 device.
1460 */
1461static int sbp2_set_busy_timeout(struct scsi_id_instance_data *scsi_id)
1462{
1463 quadlet_t data;
1464
1465 SBP2_DEBUG("sbp2_set_busy_timeout");
1466
1467 /*
1468 * Ok, let's write to the target's busy timeout register
1469 */
1470 data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE);
1471
1472 if (hpsb_node_write(scsi_id->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4)) {
1473 SBP2_ERR("sbp2_set_busy_timeout error");
1474 }
1475
a237f35f 1476 return 0;
1da177e4
LT		 1477}
1478
1da177e4
LT		 1479/*
1480 * This function is called to parse sbp2 device's config rom unit
1481 * directory. Used to determine things like sbp2 management agent offset,
1482 * and command set used (SCSI or RBC).
1483 */
1484static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id,
1485 struct unit_directory *ud)
1486{
1487 struct csr1212_keyval *kv;
1488 struct csr1212_dentry *dentry;
1489 u64 management_agent_addr;
1490 u32 command_set_spec_id, command_set, unit_characteristics,
a237f35f 1491 firmware_revision, workarounds;
1da177e4
LT		 1492 int i;
1493
1494 SBP2_DEBUG("sbp2_parse_unit_directory");
1495
1496 management_agent_addr = 0x0;
1497 command_set_spec_id = 0x0;
1498 command_set = 0x0;
1499 unit_characteristics = 0x0;
1500 firmware_revision = 0x0;
1501
1502 /* Handle different fields in the unit directory, based on keys */
1503 csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) {
1504 switch (kv->key.id) {
1505 case CSR1212_KV_ID_DEPENDENT_INFO:
1506 if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET) {
1507 /* Save off the management agent address */
1508 management_agent_addr =
a237f35f
SR		 1509 CSR1212_REGISTER_SPACE_BASE +
1510 (kv->value.csr_offset << 2);
1da177e4
LT		 1511
1512 SBP2_DEBUG("sbp2_management_agent_addr = %x",
a237f35f 1513 (unsigned int)management_agent_addr);
1da177e4 1514 } else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
a237f35f
SR		 1515 scsi_id->sbp2_lun =
1516 ORB_SET_LUN(kv->value.immediate);
1da177e4
LT		 1517 }
1518 break;
1519
1520 case SBP2_COMMAND_SET_SPEC_ID_KEY:
1521 /* Command spec organization */
1522 command_set_spec_id = kv->value.immediate;
1523 SBP2_DEBUG("sbp2_command_set_spec_id = %x",
a237f35f 1524 (unsigned int)command_set_spec_id);
1da177e4
LT		 1525 break;
1526
1527 case SBP2_COMMAND_SET_KEY:
1528 /* Command set used by sbp2 device */
1529 command_set = kv->value.immediate;
1530 SBP2_DEBUG("sbp2_command_set = %x",
a237f35f 1531 (unsigned int)command_set);
1da177e4
LT		 1532 break;
1533
1534 case SBP2_UNIT_CHARACTERISTICS_KEY:
1535 /*
1536 * Unit characterisitcs (orb related stuff
1537 * that I'm not yet paying attention to)
1538 */
1539 unit_characteristics = kv->value.immediate;
1540 SBP2_DEBUG("sbp2_unit_characteristics = %x",
a237f35f 1541 (unsigned int)unit_characteristics);
1da177e4
LT		 1542 break;
1543
1544 case SBP2_FIRMWARE_REVISION_KEY:
1545 /* Firmware revision */
1546 firmware_revision = kv->value.immediate;
1547 if (force_inquiry_hack)
1548 SBP2_INFO("sbp2_firmware_revision = %x",
a237f35f
SR		 1549 (unsigned int)firmware_revision);
1550 else
1551 SBP2_DEBUG("sbp2_firmware_revision = %x",
1552 (unsigned int)firmware_revision);
1da177e4
LT		 1553 break;
1554
1555 default:
1556 break;
1557 }
1558 }
1559
1560 /* This is the start of our broken device checking. We try to hack
1561 * around oddities and known defects. */
1562 workarounds = 0x0;
1563
1564 /* If the vendor id is 0xa0b8 (Symbios vendor id), then we have a
1565 * bridge with 128KB max transfer size limitation. For sanity, we
1566 * only voice this when the current max_sectors setting
1567 * exceeds the 128k limit. By default, that is not the case.
1568 *
1569 * It would be really nice if we could detect this before the scsi
1570 * host gets initialized. That way we can down-force the
1571 * max_sectors to account for it. That is not currently
1572 * possible. */
1573 if ((firmware_revision & 0xffff00) ==
1574 SBP2_128KB_BROKEN_FIRMWARE &&
1575 (max_sectors * 512) > (128*1024)) {
1576 SBP2_WARN("Node " NODE_BUS_FMT ": Bridge only supports 128KB max transfer size.",
1577 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid));
1578 SBP2_WARN("WARNING: Current max_sectors setting is larger than 128KB (%d sectors)!",
1579 max_sectors);
1580 workarounds |= SBP2_BREAKAGE_128K_MAX_TRANSFER;
1581 }
1582
1583 /* Check for a blacklisted set of devices that require us to force
1584 * a 36 byte host inquiry. This can be overriden as a module param
1585 * (to force all hosts). */
a80614d1 1586 for (i = 0; i < ARRAY_SIZE(sbp2_broken_inquiry_list); i++) {
1da177e4
LT		 1587 if ((firmware_revision & 0xffff00) ==
1588 sbp2_broken_inquiry_list[i]) {
1589 SBP2_WARN("Node " NODE_BUS_FMT ": Using 36byte inquiry workaround",
1590 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid));
1591 workarounds |= SBP2_BREAKAGE_INQUIRY_HACK;
1592 break; /* No need to continue. */
1593 }
1594 }
1595
1596 /* If this is a logical unit directory entry, process the parent
1597 * to get the values. */
1598 if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) {
1599 struct unit_directory *parent_ud =
1600 container_of(ud->device.parent, struct unit_directory, device);
1601 sbp2_parse_unit_directory(scsi_id, parent_ud);
1602 } else {
1603 scsi_id->sbp2_management_agent_addr = management_agent_addr;
1604 scsi_id->sbp2_command_set_spec_id = command_set_spec_id;
1605 scsi_id->sbp2_command_set = command_set;
1606 scsi_id->sbp2_unit_characteristics = unit_characteristics;
1607 scsi_id->sbp2_firmware_revision = firmware_revision;
1608 scsi_id->workarounds = workarounds;
1609 if (ud->flags & UNIT_DIRECTORY_HAS_LUN)
e309fc6d 1610 scsi_id->sbp2_lun = ORB_SET_LUN(ud->lun);
1da177e4
LT		 1611 }
1612}
1613
1614/*
1615 * This function is called in order to determine the max speed and packet
1616 * size we can use in our ORBs. Note, that we (the driver and host) only
1617 * initiate the transaction. The SBP-2 device actually transfers the data
1618 * (by reading from the DMA area we tell it). This means that the SBP-2
1619 * device decides the actual maximum data it can transfer. We just tell it
1620 * the speed that it needs to use, and the max_rec the host supports, and
1621 * it takes care of the rest.
1622 */
1623static int sbp2_max_speed_and_size(struct scsi_id_instance_data *scsi_id)
1624{
1625 struct sbp2scsi_host_info *hi = scsi_id->hi;
1626
1627 SBP2_DEBUG("sbp2_max_speed_and_size");
1628
1629 /* Initial setting comes from the hosts speed map */
a237f35f
SR		 1630 scsi_id->speed_code =
1631 hi->host->speed_map[NODEID_TO_NODE(hi->host->node_id) * 64 +
1632 NODEID_TO_NODE(scsi_id->ne->nodeid)];
1da177e4
LT		 1633
1634 /* Bump down our speed if the user requested it */
1635 if (scsi_id->speed_code > max_speed) {
1636 scsi_id->speed_code = max_speed;
1637 SBP2_ERR("Forcing SBP-2 max speed down to %s",
1638 hpsb_speedto_str[scsi_id->speed_code]);
1639 }
1640
1641 /* Payload size is the lesser of what our speed supports and what
1642 * our host supports. */
a237f35f
SR		 1643 scsi_id->max_payload_size =
1644 min(sbp2_speedto_max_payload[scsi_id->speed_code],
1645 (u8) (hi->host->csr.max_rec - 1));
1da177e4
LT		 1646
1647 HPSB_DEBUG("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]",
1648 NODE_BUS_ARGS(hi->host, scsi_id->ne->nodeid),
1649 hpsb_speedto_str[scsi_id->speed_code],
a237f35f 1650 1 << ((u32) scsi_id->max_payload_size + 2));
1da177e4 1651
a237f35f 1652 return 0;
1da177e4
LT		 1653}
1654
1655/*
1656 * This function is called in order to perform a SBP-2 agent reset.
1657 */
1658static int sbp2_agent_reset(struct scsi_id_instance_data *scsi_id, int wait)
1659{
1660 quadlet_t data;
1661 u64 addr;
1662 int retval;
1663
1664 SBP2_DEBUG("sbp2_agent_reset");
1665
1666 /*
1667 * Ok, let's write to the target's management agent register
1668 */
1669 data = ntohl(SBP2_AGENT_RESET_DATA);
1670 addr = scsi_id->sbp2_command_block_agent_addr + SBP2_AGENT_RESET_OFFSET;
1671
1672 if (wait)
1673 retval = hpsb_node_write(scsi_id->ne, addr, &data, 4);
1674 else
1675 retval = sbp2util_node_write_no_wait(scsi_id->ne, addr, &data, 4);
1676
1677 if (retval < 0) {
1678 SBP2_ERR("hpsb_node_write failed.\n");
1679 return -EIO;
1680 }
1681
1682 /*
1683 * Need to make sure orb pointer is written on next command
1684 */
1685 scsi_id->last_orb = NULL;
1686
a237f35f 1687 return 0;
1da177e4
LT		 1688}
1689
cf8d2c09
SR		 1690static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb,
1691 struct sbp2scsi_host_info *hi,
1692 struct sbp2_command_info *command,
1693 unsigned int scsi_use_sg,
1694 struct scatterlist *sgpnt,
1695 u32 orb_direction,
1696 enum dma_data_direction dma_dir)
1697{
1698 command->dma_dir = dma_dir;
1699 orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1700 orb->misc |= ORB_SET_DIRECTION(orb_direction);
1701
1702 /* Special case if only one element (and less than 64KB in size) */
1703 if ((scsi_use_sg == 1) &&
1704 (sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) {
1705
1706 SBP2_DEBUG("Only one s/g element");
1707 command->dma_size = sgpnt[0].length;
1708 command->dma_type = CMD_DMA_PAGE;
1709 command->cmd_dma = pci_map_page(hi->host->pdev,
1710 sgpnt[0].page,
1711 sgpnt[0].offset,
1712 command->dma_size,
1713 command->dma_dir);
1714 SBP2_DMA_ALLOC("single page scatter element");
1715
1716 orb->data_descriptor_lo = command->cmd_dma;
1717 orb->misc |= ORB_SET_DATA_SIZE(command->dma_size);
1718
1719 } else {
1720 struct sbp2_unrestricted_page_table *sg_element =
1721 &command->scatter_gather_element[0];
1722 u32 sg_count, sg_len;
1723 dma_addr_t sg_addr;
1724 int i, count = pci_map_sg(hi->host->pdev, sgpnt, scsi_use_sg,
1725 dma_dir);
1726
1727 SBP2_DMA_ALLOC("scatter list");
1728
1729 command->dma_size = scsi_use_sg;
1730 command->sge_buffer = sgpnt;
1731
1732 /* use page tables (s/g) */
1733 orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1734 orb->data_descriptor_lo = command->sge_dma;
1735
1736 /*
1737 * Loop through and fill out our sbp-2 page tables
1738 * (and split up anything too large)
1739 */
1740 for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) {
1741 sg_len = sg_dma_len(sgpnt);
1742 sg_addr = sg_dma_address(sgpnt);
1743 while (sg_len) {
1744 sg_element[sg_count].segment_base_lo = sg_addr;
1745 if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
1746 sg_element[sg_count].length_segment_base_hi =
1747 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
1748 sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
1749 sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
1750 } else {
1751 sg_element[sg_count].length_segment_base_hi =
1752 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
1753 sg_len = 0;
1754 }
1755 sg_count++;
1756 }
1757 }
1758
1759 /* Number of page table (s/g) elements */
1760 orb->misc |= ORB_SET_DATA_SIZE(sg_count);
1761
1762 sbp2util_packet_dump(sg_element,
1763 (sizeof(struct sbp2_unrestricted_page_table)) * sg_count,
1764 "sbp2 s/g list", command->sge_dma);
1765
1766 /* Byte swap page tables if necessary */
1767 sbp2util_cpu_to_be32_buffer(sg_element,
1768 (sizeof(struct sbp2_unrestricted_page_table)) *
1769 sg_count);
1770 }
1771}
1772
1773static void sbp2_prep_command_orb_no_sg(struct sbp2_command_orb *orb,
1774 struct sbp2scsi_host_info *hi,
1775 struct sbp2_command_info *command,
1776 struct scatterlist *sgpnt,
1777 u32 orb_direction,
1778 unsigned int scsi_request_bufflen,
1779 void *scsi_request_buffer,
1780 enum dma_data_direction dma_dir)
1781{
1782 command->dma_dir = dma_dir;
1783 command->dma_size = scsi_request_bufflen;
1784 command->dma_type = CMD_DMA_SINGLE;
1785 command->cmd_dma = pci_map_single(hi->host->pdev, scsi_request_buffer,
1786 command->dma_size, command->dma_dir);
1787 orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1788 orb->misc |= ORB_SET_DIRECTION(orb_direction);
1789
1790 SBP2_DMA_ALLOC("single bulk");
1791
1792 /*
1793 * Handle case where we get a command w/o s/g enabled (but
1794 * check for transfers larger than 64K)
1795 */
1796 if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) {
1797
1798 orb->data_descriptor_lo = command->cmd_dma;
1799 orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen);
1800
1801 } else {
1802 struct sbp2_unrestricted_page_table *sg_element =
1803 &command->scatter_gather_element[0];
1804 u32 sg_count, sg_len;
1805 dma_addr_t sg_addr;
1806
1807 /*
1808 * Need to turn this into page tables, since the
1809 * buffer is too large.
1810 */
1811 orb->data_descriptor_lo = command->sge_dma;
1812
1813 /* Use page tables (s/g) */
1814 orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1815
1816 /*
1817 * fill out our sbp-2 page tables (and split up
1818 * the large buffer)
1819 */
1820 sg_count = 0;
1821 sg_len = scsi_request_bufflen;
1822 sg_addr = command->cmd_dma;
1823 while (sg_len) {
1824 sg_element[sg_count].segment_base_lo = sg_addr;
1825 if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
1826 sg_element[sg_count].length_segment_base_hi =
1827 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
1828 sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
1829 sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
1830 } else {
1831 sg_element[sg_count].length_segment_base_hi =
1832 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
1833 sg_len = 0;
1834 }
1835 sg_count++;
1836 }
1837
1838 /* Number of page table (s/g) elements */
1839 orb->misc |= ORB_SET_DATA_SIZE(sg_count);
1840
1841 sbp2util_packet_dump(sg_element,
1842 (sizeof(struct sbp2_unrestricted_page_table)) * sg_count,
1843 "sbp2 s/g list", command->sge_dma);
1844
1845 /* Byte swap page tables if necessary */
1846 sbp2util_cpu_to_be32_buffer(sg_element,
1847 (sizeof(struct sbp2_unrestricted_page_table)) *
1848 sg_count);
1849 }
1850}
1851
1da177e4
LT		 1852/*
1853 * This function is called to create the actual command orb and s/g list
1854 * out of the scsi command itself.
1855 */
cf8d2c09
SR		 1856static void sbp2_create_command_orb(struct scsi_id_instance_data *scsi_id,
1857 struct sbp2_command_info *command,
1858 unchar *scsi_cmd,
1859 unsigned int scsi_use_sg,
1860 unsigned int scsi_request_bufflen,
1861 void *scsi_request_buffer,
1862 enum dma_data_direction dma_dir)
1da177e4
LT		 1863{
1864 struct sbp2scsi_host_info *hi = scsi_id->hi;
a237f35f 1865 struct scatterlist *sgpnt = (struct scatterlist *)scsi_request_buffer;
1da177e4 1866 struct sbp2_command_orb *command_orb = &command->command_orb;
cf8d2c09 1867 u32 orb_direction;
1da177e4
LT		 1868
1869 /*
1870 * Set-up our command ORB..
1871 *
1872 * NOTE: We're doing unrestricted page tables (s/g), as this is
1873 * best performance (at least with the devices I have). This means
1874 * that data_size becomes the number of s/g elements, and
1875 * page_size should be zero (for unrestricted).
1876 */
1877 command_orb->next_ORB_hi = ORB_SET_NULL_PTR(1);
1878 command_orb->next_ORB_lo = 0x0;
1879 command_orb->misc = ORB_SET_MAX_PAYLOAD(scsi_id->max_payload_size);
1880 command_orb->misc |= ORB_SET_SPEED(scsi_id->speed_code);
a237f35f 1881 command_orb->misc |= ORB_SET_NOTIFY(1); /* Notify us when complete */
1da177e4 1882
43863eba 1883 if (dma_dir == DMA_NONE)
a237f35f 1884 orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
43863eba 1885 else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen)
a237f35f 1886 orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA;
43863eba 1887 else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen)
a237f35f 1888 orb_direction = ORB_DIRECTION_READ_FROM_MEDIA;
43863eba
SR		 1889 else {
1890 SBP2_WARN("Falling back to DMA_NONE");
1891 orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
1da177e4
LT		 1892 }
1893
cf8d2c09 1894 /* Set-up our pagetable stuff */
1da177e4 1895 if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) {
1da177e4 1896 SBP2_DEBUG("No data transfer");
1da177e4
LT		 1897 command_orb->data_descriptor_hi = 0x0;
1898 command_orb->data_descriptor_lo = 0x0;
1899 command_orb->misc |= ORB_SET_DIRECTION(1);
1da177e4 1900 } else if (scsi_use_sg) {
1da177e4 1901 SBP2_DEBUG("Use scatter/gather");
cf8d2c09
SR		 1902 sbp2_prep_command_orb_sg(command_orb, hi, command, scsi_use_sg,
1903 sgpnt, orb_direction, dma_dir);
1da177e4 1904 } else {
1da177e4 1905 SBP2_DEBUG("No scatter/gather");
cf8d2c09
SR		 1906 sbp2_prep_command_orb_no_sg(command_orb, hi, command, sgpnt,
1907 orb_direction, scsi_request_bufflen,
1908 scsi_request_buffer, dma_dir);
1da177e4
LT		 1909 }
1910
cf8d2c09 1911 /* Byte swap command ORB if necessary */
1da177e4
LT		 1912 sbp2util_cpu_to_be32_buffer(command_orb, sizeof(struct sbp2_command_orb));
1913
cf8d2c09 1914 /* Put our scsi command in the command ORB */
1da177e4
LT		 1915 memset(command_orb->cdb, 0, 12);
1916 memcpy(command_orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd));
1da177e4
LT		 1917}
1918
1919/*
1920 * This function is called in order to begin a regular SBP-2 command.
1921 */
1922static int sbp2_link_orb_command(struct scsi_id_instance_data *scsi_id,
1923 struct sbp2_command_info *command)
1924{
1925 struct sbp2scsi_host_info *hi = scsi_id->hi;
1926 struct sbp2_command_orb *command_orb = &command->command_orb;
1927 struct node_entry *ne = scsi_id->ne;
1928 u64 addr;
1929
1930 outstanding_orb_incr;
1931 SBP2_ORB_DEBUG("sending command orb %p, total orbs = %x",
a237f35f 1932 command_orb, global_outstanding_command_orbs);
1da177e4
LT		 1933
1934 pci_dma_sync_single_for_device(hi->host->pdev, command->command_orb_dma,
1935 sizeof(struct sbp2_command_orb),
1936 PCI_DMA_BIDIRECTIONAL);
1937 pci_dma_sync_single_for_device(hi->host->pdev, command->sge_dma,
1938 sizeof(command->scatter_gather_element),
1939 PCI_DMA_BIDIRECTIONAL);
1940 /*
1941 * Check to see if there are any previous orbs to use
1942 */
1943 if (scsi_id->last_orb == NULL) {
1944 quadlet_t data[2];
1945
1946 /*
1947 * Ok, let's write to the target's management agent register
1948 */
1949 addr = scsi_id->sbp2_command_block_agent_addr + SBP2_ORB_POINTER_OFFSET;
1950 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1951 data[1] = command->command_orb_dma;
1952 sbp2util_cpu_to_be32_buffer(data, 8);
1953
1954 SBP2_ORB_DEBUG("write command agent, command orb %p", command_orb);
1955
1956 if (sbp2util_node_write_no_wait(ne, addr, data, 8) < 0) {
1957 SBP2_ERR("sbp2util_node_write_no_wait failed.\n");
1958 return -EIO;
1959 }
1960
1961 SBP2_ORB_DEBUG("write command agent complete");
1962
1963 scsi_id->last_orb = command_orb;
1964 scsi_id->last_orb_dma = command->command_orb_dma;
1965
1966 } else {
1967 quadlet_t data;
1968
1969 /*
1970 * We have an orb already sent (maybe or maybe not
1971 * processed) that we can append this orb to. So do so,
1972 * and ring the doorbell. Have to be very careful
1973 * modifying these next orb pointers, as they are accessed
1974 * both by the sbp2 device and us.
1975 */
1976 scsi_id->last_orb->next_ORB_lo =
a237f35f 1977 cpu_to_be32(command->command_orb_dma);
1da177e4
LT		 1978 /* Tells hardware that this pointer is valid */
1979 scsi_id->last_orb->next_ORB_hi = 0x0;
a237f35f
SR		 1980 pci_dma_sync_single_for_device(hi->host->pdev,
1981 scsi_id->last_orb_dma,
1da177e4
LT		 1982 sizeof(struct sbp2_command_orb),
1983 PCI_DMA_BIDIRECTIONAL);
1984
1985 /*
1986 * Ring the doorbell
1987 */
1988 data = cpu_to_be32(command->command_orb_dma);
1989 addr = scsi_id->sbp2_command_block_agent_addr + SBP2_DOORBELL_OFFSET;
1990
1991 SBP2_ORB_DEBUG("ring doorbell, command orb %p", command_orb);
1992
1993 if (sbp2util_node_write_no_wait(ne, addr, &data, 4) < 0) {
1994 SBP2_ERR("sbp2util_node_write_no_wait failed");
a237f35f 1995 return -EIO;
1da177e4
LT		 1996 }
1997
1998 scsi_id->last_orb = command_orb;
1999 scsi_id->last_orb_dma = command->command_orb_dma;
2000
2001 }
a237f35f 2002 return 0;
1da177e4
LT		 2003}
2004
2005/*
2006 * This function is called in order to begin a regular SBP-2 command.
2007 */
2008static int sbp2_send_command(struct scsi_id_instance_data *scsi_id,
2009 struct scsi_cmnd *SCpnt,
2010 void (*done)(struct scsi_cmnd *))
2011{
2012 unchar *cmd = (unchar *) SCpnt->cmnd;
2013 unsigned int request_bufflen = SCpnt->request_bufflen;
2014 struct sbp2_command_info *command;
2015
2016 SBP2_DEBUG("sbp2_send_command");
2017#if (CONFIG_IEEE1394_SBP2_DEBUG >= 2) || defined(CONFIG_IEEE1394_SBP2_PACKET_DUMP)
2018 printk("[scsi command]\n ");
2019 scsi_print_command(SCpnt);
2020#endif
2021 SBP2_DEBUG("SCSI transfer size = %x", request_bufflen);
2022 SBP2_DEBUG("SCSI s/g elements = %x", (unsigned int)SCpnt->use_sg);
2023
2024 /*
2025 * Allocate a command orb and s/g structure
2026 */
2027 command = sbp2util_allocate_command_orb(scsi_id, SCpnt, done);
2028 if (!command) {
a237f35f 2029 return -EIO;
1da177e4
LT		 2030 }
2031
1da177e4
LT		 2032 /*
2033 * Now actually fill in the comamnd orb and sbp2 s/g list
2034 */
2035 sbp2_create_command_orb(scsi_id, command, cmd, SCpnt->use_sg,
2036 request_bufflen, SCpnt->request_buffer,
2037 SCpnt->sc_data_direction);
1da177e4
LT		 2038
2039 sbp2util_packet_dump(&command->command_orb, sizeof(struct sbp2_command_orb),
2040 "sbp2 command orb", command->command_orb_dma);
2041
2042 /*
2043 * Initialize status fifo
2044 */
2045 memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
2046
2047 /*
2048 * Link up the orb, and ring the doorbell if needed
2049 */
2050 sbp2_link_orb_command(scsi_id, command);
2051
a237f35f 2052 return 0;
1da177e4
LT		 2053}
2054
1da177e4
LT		 2055/*
2056 * Translates SBP-2 status into SCSI sense data for check conditions
2057 */
2058static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, unchar *sense_data)
2059{
2060 SBP2_DEBUG("sbp2_status_to_sense_data");
2061
2062 /*
2063 * Ok, it's pretty ugly... ;-)
2064 */
2065 sense_data[0] = 0x70;
2066 sense_data[1] = 0x0;
2067 sense_data[2] = sbp2_status[9];
2068 sense_data[3] = sbp2_status[12];
2069 sense_data[4] = sbp2_status[13];
2070 sense_data[5] = sbp2_status[14];
2071 sense_data[6] = sbp2_status[15];
2072 sense_data[7] = 10;
2073 sense_data[8] = sbp2_status[16];
2074 sense_data[9] = sbp2_status[17];
2075 sense_data[10] = sbp2_status[18];
2076 sense_data[11] = sbp2_status[19];
2077 sense_data[12] = sbp2_status[10];
2078 sense_data[13] = sbp2_status[11];
2079 sense_data[14] = sbp2_status[20];
2080 sense_data[15] = sbp2_status[21];
2081
a237f35f 2082 return sbp2_status[8] & 0x3f; /* return scsi status */
1da177e4
LT		 2083}
2084
2085/*
2086 * This function is called after a command is completed, in order to do any necessary SBP-2
2087 * response data translations for the SCSI stack
2088 */
a237f35f 2089static void sbp2_check_sbp2_response(struct scsi_id_instance_data *scsi_id,
1da177e4
LT		 2090 struct scsi_cmnd *SCpnt)
2091{
2092 u8 *scsi_buf = SCpnt->request_buffer;
1da177e4
LT		 2093
2094 SBP2_DEBUG("sbp2_check_sbp2_response");
2095
e30809fd 2096 if (SCpnt->cmnd[0] == INQUIRY && (SCpnt->cmnd[1] & 3) == 0) {
a237f35f
SR		 2097 /*
2098 * Make sure data length is ok. Minimum length is 36 bytes
2099 */
2100 if (scsi_buf[4] == 0) {
2101 scsi_buf[4] = 36 - 5;
2102 }
1da177e4 2103
a237f35f
SR		 2104 /*
2105 * Fix ansi revision and response data format
2106 */
2107 scsi_buf[2] |= 2;
2108 scsi_buf[3] = (scsi_buf[3] & 0xf0) | 2;
1da177e4 2109 }
1da177e4
LT		 2110}
2111
2112/*
2113 * This function deals with status writes from the SBP-2 device
2114 */
2115static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, int destid,
2116 quadlet_t *data, u64 addr, size_t length, u16 fl)
2117{
2118 struct sbp2scsi_host_info *hi;
2119 struct scsi_id_instance_data *scsi_id = NULL, *scsi_id_tmp;
1da177e4
LT		 2120 struct scsi_cmnd *SCpnt = NULL;
2121 u32 scsi_status = SBP2_SCSI_STATUS_GOOD;
2122 struct sbp2_command_info *command;
79456197 2123 unsigned long flags;
1da177e4
LT		 2124
2125 SBP2_DEBUG("sbp2_handle_status_write");
2126
2127 sbp2util_packet_dump(data, length, "sbp2 status write by device", (u32)addr);
2128
2129 if (!host) {
2130 SBP2_ERR("host is NULL - this is bad!");
a237f35f 2131 return RCODE_ADDRESS_ERROR;
1da177e4
LT		 2132 }
2133
2134 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
2135
2136 if (!hi) {
2137 SBP2_ERR("host info is NULL - this is bad!");
a237f35f 2138 return RCODE_ADDRESS_ERROR;
1da177e4
LT		 2139 }
2140
2141 /*
35bdddb8
SR		 2142 * Find our scsi_id structure by looking at the status fifo address
2143 * written to by the sbp2 device.
1da177e4 2144 */
1da177e4 2145 list_for_each_entry(scsi_id_tmp, &hi->scsi_ids, scsi_list) {
35bdddb8
SR		 2146 if (scsi_id_tmp->ne->nodeid == nodeid &&
2147 scsi_id_tmp->status_fifo_addr == addr) {
1da177e4
LT		 2148 scsi_id = scsi_id_tmp;
2149 break;
2150 }
2151 }
2152
2153 if (!scsi_id) {
2154 SBP2_ERR("scsi_id is NULL - device is gone?");
a237f35f 2155 return RCODE_ADDRESS_ERROR;
1da177e4
LT		 2156 }
2157
2158 /*
2159 * Put response into scsi_id status fifo...
2160 */
2161 memcpy(&scsi_id->status_block, data, length);
2162
2163 /*
2164 * Byte swap first two quadlets (8 bytes) of status for processing
2165 */
2166 sbp2util_be32_to_cpu_buffer(&scsi_id->status_block, 8);
2167
2168 /*
2169 * Handle command ORB status here if necessary. First, need to match status with command.
2170 */
2171 command = sbp2util_find_command_for_orb(scsi_id, scsi_id->status_block.ORB_offset_lo);
2172 if (command) {
2173
2174 SBP2_DEBUG("Found status for command ORB");
2175 pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma,
2176 sizeof(struct sbp2_command_orb),
2177 PCI_DMA_BIDIRECTIONAL);
2178 pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma,
2179 sizeof(command->scatter_gather_element),
2180 PCI_DMA_BIDIRECTIONAL);
2181
2182 SBP2_ORB_DEBUG("matched command orb %p", &command->command_orb);
2183 outstanding_orb_decr;
2184
2185 /*
2186 * Matched status with command, now grab scsi command pointers and check status
2187 */
2188 SCpnt = command->Current_SCpnt;
2189 sbp2util_mark_command_completed(scsi_id, command);
2190
2191 if (SCpnt) {
2192
2193 /*
2194 * See if the target stored any scsi status information
2195 */
2196 if (STATUS_GET_LENGTH(scsi_id->status_block.ORB_offset_hi_misc) > 1) {
2197 /*
2198 * Translate SBP-2 status to SCSI sense data
2199 */
2200 SBP2_DEBUG("CHECK CONDITION");
2201 scsi_status = sbp2_status_to_sense_data((unchar *)&scsi_id->status_block, SCpnt->sense_buffer);
2202 }
2203
2204 /*
2205 * Check to see if the dead bit is set. If so, we'll have to initiate
2206 * a fetch agent reset.
2207 */
2208 if (STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc)) {
2209
2210 /*
2211 * Initiate a fetch agent reset.
2212 */
2213 SBP2_DEBUG("Dead bit set - initiating fetch agent reset");
2214 sbp2_agent_reset(scsi_id, 0);
2215 }
2216
2217 SBP2_ORB_DEBUG("completing command orb %p", &command->command_orb);
2218 }
2219
2220 /*
2221 * Check here to see if there are no commands in-use. If there are none, we can
2222 * null out last orb so that next time around we write directly to the orb pointer...
2223 * Quick start saves one 1394 bus transaction.
2224 */
79456197 2225 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
1da177e4
LT		 2226 if (list_empty(&scsi_id->sbp2_command_orb_inuse)) {
2227 scsi_id->last_orb = NULL;
2228 }
79456197 2229 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
1da177e4
LT		 2230
2231 } else {
2232
2233 /*
2234 * It's probably a login/logout/reconnect status.
2235 */
2236 if ((scsi_id->login_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
2237 (scsi_id->query_logins_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
2238 (scsi_id->reconnect_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
2239 (scsi_id->logout_orb_dma == scsi_id->status_block.ORB_offset_lo)) {
2240 atomic_set(&scsi_id->sbp2_login_complete, 1);
2241 }
2242 }
2243
2244 if (SCpnt) {
2245
2246 /* Complete the SCSI command. */
2247 SBP2_DEBUG("Completing SCSI command");
2248 sbp2scsi_complete_command(scsi_id, scsi_status, SCpnt,
2249 command->Current_done);
2250 SBP2_ORB_DEBUG("command orb completed");
2251 }
2252
a237f35f 2253 return RCODE_COMPLETE;
1da177e4
LT		 2254}
2255
1da177e4
LT		 2256/**************************************
2257 * SCSI interface related section
2258 **************************************/
2259
2260/*
2261 * This routine is the main request entry routine for doing I/O. It is
2262 * called from the scsi stack directly.
2263 */
2264static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt,
2265 void (*done)(struct scsi_cmnd *))
2266{
2267 struct scsi_id_instance_data *scsi_id =
2268 (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
2269 struct sbp2scsi_host_info *hi;
abd559b1 2270 int result = DID_NO_CONNECT << 16;
1da177e4
LT		 2271
2272 SBP2_DEBUG("sbp2scsi_queuecommand");
2273
abd559b1
JM		 2274 if (!sbp2util_node_is_available(scsi_id))
2275 goto done;
1da177e4
LT		 2276
2277 hi = scsi_id->hi;
2278
2279 if (!hi) {
2280 SBP2_ERR("sbp2scsi_host_info is NULL - this is bad!");
abd559b1 2281 goto done;
1da177e4
LT		 2282 }
2283
2284 /*
2285 * Until we handle multiple luns, just return selection time-out
2286 * to any IO directed at non-zero LUNs
2287 */
abd559b1
JM		 2288 if (SCpnt->device->lun)
2289 goto done;
1da177e4
LT		 2290
2291 /*
2292 * Check for request sense command, and handle it here
2293 * (autorequest sense)
2294 */
2295 if (SCpnt->cmnd[0] == REQUEST_SENSE) {
2296 SBP2_DEBUG("REQUEST_SENSE");
2297 memcpy(SCpnt->request_buffer, SCpnt->sense_buffer, SCpnt->request_bufflen);
2298 memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer));
2299 sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_GOOD, SCpnt, done);
abd559b1 2300 return 0;
1da177e4
LT		 2301 }
2302
2303 /*
2304 * Check to see if we are in the middle of a bus reset.
2305 */
2306 if (!hpsb_node_entry_valid(scsi_id->ne)) {
2307 SBP2_ERR("Bus reset in progress - rejecting command");
abd559b1
JM		 2308 result = DID_BUS_BUSY << 16;
2309 goto done;
1da177e4
LT		 2310 }
2311
43863eba
SR		 2312 /*
2313 * Bidirectional commands are not yet implemented,
2314 * and unknown transfer direction not handled.
2315 */
2316 if (SCpnt->sc_data_direction == DMA_BIDIRECTIONAL) {
2317 SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command");
2318 result = DID_ERROR << 16;
2319 goto done;
2320 }
2321
1da177e4
LT		 2322 /*
2323 * Try and send our SCSI command
2324 */
2325 if (sbp2_send_command(scsi_id, SCpnt, done)) {
2326 SBP2_ERR("Error sending SCSI command");
2327 sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_SELECTION_TIMEOUT,
2328 SCpnt, done);
2329 }
abd559b1 2330 return 0;
1da177e4 2331
abd559b1
JM		 2332done:
2333 SCpnt->result = result;
2334 done(SCpnt);
2335 return 0;
1da177e4
LT		 2336}
2337
2338/*
2339 * This function is called in order to complete all outstanding SBP-2
2340 * commands (in case of resets, etc.).
2341 */
2342static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id,
2343 u32 status)
2344{
2345 struct sbp2scsi_host_info *hi = scsi_id->hi;
2346 struct list_head *lh;
2347 struct sbp2_command_info *command;
79456197 2348 unsigned long flags;
1da177e4
LT		 2349
2350 SBP2_DEBUG("sbp2scsi_complete_all_commands");
2351
79456197 2352 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
1da177e4
LT		 2353 while (!list_empty(&scsi_id->sbp2_command_orb_inuse)) {
2354 SBP2_DEBUG("Found pending command to complete");
2355 lh = scsi_id->sbp2_command_orb_inuse.next;
2356 command = list_entry(lh, struct sbp2_command_info, list);
2357 pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma,
2358 sizeof(struct sbp2_command_orb),
2359 PCI_DMA_BIDIRECTIONAL);
2360 pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma,
2361 sizeof(command->scatter_gather_element),
2362 PCI_DMA_BIDIRECTIONAL);
2363 sbp2util_mark_command_completed(scsi_id, command);
2364 if (command->Current_SCpnt) {
2365 command->Current_SCpnt->result = status << 16;
2366 command->Current_done(command->Current_SCpnt);
2367 }
2368 }
79456197 2369 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
1da177e4
LT		 2370
2371 return;
2372}
2373
2374/*
2375 * This function is called in order to complete a regular SBP-2 command.
2376 *
2377 * This can be called in interrupt context.
2378 */
2379static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id,
2380 u32 scsi_status, struct scsi_cmnd *SCpnt,
2381 void (*done)(struct scsi_cmnd *))
2382{
1da177e4
LT		 2383 SBP2_DEBUG("sbp2scsi_complete_command");
2384
2385 /*
2386 * Sanity
2387 */
2388 if (!SCpnt) {
2389 SBP2_ERR("SCpnt is NULL");
2390 return;
2391 }
2392
2393 /*
2394 * If a bus reset is in progress and there was an error, don't
2395 * complete the command, just let it get retried at the end of the
2396 * bus reset.
2397 */
a237f35f
SR		 2398 if (!hpsb_node_entry_valid(scsi_id->ne)
2399 && (scsi_status != SBP2_SCSI_STATUS_GOOD)) {
1da177e4
LT		 2400 SBP2_ERR("Bus reset in progress - retry command later");
2401 return;
2402 }
a237f35f 2403
1da177e4
LT		 2404 /*
2405 * Switch on scsi status
2406 */
2407 switch (scsi_status) {
a237f35f
SR		 2408 case SBP2_SCSI_STATUS_GOOD:
2409 SCpnt->result = DID_OK;
2410 break;
1da177e4 2411
a237f35f
SR		 2412 case SBP2_SCSI_STATUS_BUSY:
2413 SBP2_ERR("SBP2_SCSI_STATUS_BUSY");
2414 SCpnt->result = DID_BUS_BUSY << 16;
2415 break;
1da177e4 2416
a237f35f
SR		 2417 case SBP2_SCSI_STATUS_CHECK_CONDITION:
2418 SBP2_DEBUG("SBP2_SCSI_STATUS_CHECK_CONDITION");
2419 SCpnt->result = CHECK_CONDITION << 1;
1da177e4 2420
a237f35f
SR		 2421 /*
2422 * Debug stuff
2423 */
1da177e4 2424#if CONFIG_IEEE1394_SBP2_DEBUG >= 1
a237f35f
SR		 2425 scsi_print_command(SCpnt);
2426 scsi_print_sense("bh", SCpnt);
1da177e4
LT		 2427#endif
2428
a237f35f 2429 break;
1da177e4 2430
a237f35f
SR		 2431 case SBP2_SCSI_STATUS_SELECTION_TIMEOUT:
2432 SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT");
2433 SCpnt->result = DID_NO_CONNECT << 16;
2434 scsi_print_command(SCpnt);
2435 break;
1da177e4 2436
a237f35f
SR		 2437 case SBP2_SCSI_STATUS_CONDITION_MET:
2438 case SBP2_SCSI_STATUS_RESERVATION_CONFLICT:
2439 case SBP2_SCSI_STATUS_COMMAND_TERMINATED:
2440 SBP2_ERR("Bad SCSI status = %x", scsi_status);
2441 SCpnt->result = DID_ERROR << 16;
2442 scsi_print_command(SCpnt);
2443 break;
1da177e4 2444
a237f35f
SR		 2445 default:
2446 SBP2_ERR("Unsupported SCSI status = %x", scsi_status);
2447 SCpnt->result = DID_ERROR << 16;
1da177e4
LT		 2448 }
2449
2450 /*
2451 * Take care of any sbp2 response data mucking here (RBC stuff, etc.)
2452 */
2453 if (SCpnt->result == DID_OK) {
2454 sbp2_check_sbp2_response(scsi_id, SCpnt);
2455 }
2456
2457 /*
2458 * If a bus reset is in progress and there was an error, complete
2459 * the command as busy so that it will get retried.
2460 */
a237f35f
SR		 2461 if (!hpsb_node_entry_valid(scsi_id->ne)
2462 && (scsi_status != SBP2_SCSI_STATUS_GOOD)) {
1da177e4
LT		 2463 SBP2_ERR("Completing command with busy (bus reset)");
2464 SCpnt->result = DID_BUS_BUSY << 16;
2465 }
2466
2467 /*
2468 * If a unit attention occurs, return busy status so it gets
2469 * retried... it could have happened because of a 1394 bus reset
2470 * or hot-plug...
2471 */
2472#if 0
2473 if ((scsi_status == SBP2_SCSI_STATUS_CHECK_CONDITION) &&
2474 (SCpnt->sense_buffer[2] == UNIT_ATTENTION)) {
2475 SBP2_DEBUG("UNIT ATTENTION - return busy");
2476 SCpnt->result = DID_BUS_BUSY << 16;
2477 }
2478#endif
2479
2480 /*
2481 * Tell scsi stack that we're done with this command
2482 */
a237f35f 2483 done(SCpnt);
1da177e4
LT		 2484}
2485
abd559b1 2486static int sbp2scsi_slave_alloc(struct scsi_device *sdev)
1da177e4 2487{
a80614d1
SR		 2488 struct scsi_id_instance_data *scsi_id =
2489 (struct scsi_id_instance_data *)sdev->host->hostdata[0];
2490
2491 scsi_id->sdev = sdev;
2492
2493 if (force_inquiry_hack ||
2494 scsi_id->workarounds & SBP2_BREAKAGE_INQUIRY_HACK) {
2495 sdev->inquiry_len = 36;
2496 sdev->skip_ms_page_8 = 1;
2497 }
abd559b1
JM		 2498 return 0;
2499}
2500
abd559b1
JM		 2501static int sbp2scsi_slave_configure(struct scsi_device *sdev)
2502{
2503 blk_queue_dma_alignment(sdev->request_queue, (512 - 1));
365c786f
BC		 2504 sdev->use_10_for_rw = 1;
2505 sdev->use_10_for_ms = 1;
1da177e4
LT		 2506 return 0;
2507}
2508
abd559b1
JM		 2509static void sbp2scsi_slave_destroy(struct scsi_device *sdev)
2510{
2511 ((struct scsi_id_instance_data *)sdev->host->hostdata[0])->sdev = NULL;
2512 return;
2513}
2514
1da177e4
LT		 2515/*
2516 * Called by scsi stack when something has really gone wrong. Usually
2517 * called when a command has timed-out for some reason.
2518 */
2519static int sbp2scsi_abort(struct scsi_cmnd *SCpnt)
2520{
2521 struct scsi_id_instance_data *scsi_id =
2522 (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
2523 struct sbp2scsi_host_info *hi = scsi_id->hi;
2524 struct sbp2_command_info *command;
2525
2526 SBP2_ERR("aborting sbp2 command");
2527 scsi_print_command(SCpnt);
2528
abd559b1 2529 if (sbp2util_node_is_available(scsi_id)) {
1da177e4
LT		 2530
2531 /*
2532 * Right now, just return any matching command structures
2533 * to the free pool.
2534 */
2535 command = sbp2util_find_command_for_SCpnt(scsi_id, SCpnt);
2536 if (command) {
2537 SBP2_DEBUG("Found command to abort");
2538 pci_dma_sync_single_for_cpu(hi->host->pdev,
2539 command->command_orb_dma,
2540 sizeof(struct sbp2_command_orb),
2541 PCI_DMA_BIDIRECTIONAL);
2542 pci_dma_sync_single_for_cpu(hi->host->pdev,
2543 command->sge_dma,
2544 sizeof(command->scatter_gather_element),
2545 PCI_DMA_BIDIRECTIONAL);
2546 sbp2util_mark_command_completed(scsi_id, command);
2547 if (command->Current_SCpnt) {
2548 command->Current_SCpnt->result = DID_ABORT << 16;
2549 command->Current_done(command->Current_SCpnt);
2550 }
2551 }
2552
2553 /*
2554 * Initiate a fetch agent reset.
2555 */
2556 sbp2_agent_reset(scsi_id, 0);
2557 sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY);
2558 }
2559
a237f35f 2560 return SUCCESS;
1da177e4
LT		 2561}
2562
2563/*
2564 * Called by scsi stack when something has really gone wrong.
2565 */
abd559b1 2566static int sbp2scsi_reset(struct scsi_cmnd *SCpnt)
1da177e4
LT		 2567{
2568 struct scsi_id_instance_data *scsi_id =
2569 (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
2570
2571 SBP2_ERR("reset requested");
2572
abd559b1 2573 if (sbp2util_node_is_available(scsi_id)) {
1da177e4
LT		 2574 SBP2_ERR("Generating sbp2 fetch agent reset");
2575 sbp2_agent_reset(scsi_id, 0);
2576 }
2577
abd559b1 2578 return SUCCESS;
94d0e7b8
JG		 2579}
2580
a237f35f
SR		 2581static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev,
2582 struct device_attribute *attr,
2583 char *buf)
1da177e4
LT		 2584{
2585 struct scsi_device *sdev;
2586 struct scsi_id_instance_data *scsi_id;
2587 int lun;
2588
2589 if (!(sdev = to_scsi_device(dev)))
2590 return 0;
2591
2592 if (!(scsi_id = (struct scsi_id_instance_data *)sdev->host->hostdata[0]))
2593 return 0;
2594
e309fc6d 2595 lun = ORB_SET_LUN(scsi_id->sbp2_lun);
1da177e4
LT		 2596
2597 return sprintf(buf, "%016Lx:%d:%d\n", (unsigned long long)scsi_id->ne->guid,
2598 scsi_id->ud->id, lun);
2599}
2600static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL);
2601
2602static struct device_attribute *sbp2_sysfs_sdev_attrs[] = {
2603 &dev_attr_ieee1394_id,
2604 NULL
2605};
2606
2607MODULE_AUTHOR("Ben Collins <bcollins@debian.org>");
2608MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver");
2609MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME);
2610MODULE_LICENSE("GPL");
2611
2612/* SCSI host template */
2613static struct scsi_host_template scsi_driver_template = {
2614 .module = THIS_MODULE,
2615 .name = "SBP-2 IEEE-1394",
2616 .proc_name = SBP2_DEVICE_NAME,
1da177e4
LT		 2617 .queuecommand = sbp2scsi_queuecommand,
2618 .eh_abort_handler = sbp2scsi_abort,
2619 .eh_device_reset_handler = sbp2scsi_reset,
abd559b1 2620 .slave_alloc = sbp2scsi_slave_alloc,
1da177e4 2621 .slave_configure = sbp2scsi_slave_configure,
abd559b1 2622 .slave_destroy = sbp2scsi_slave_destroy,
1da177e4
LT		 2623 .this_id = -1,
2624 .sg_tablesize = SG_ALL,
2625 .use_clustering = ENABLE_CLUSTERING,
2626 .cmd_per_lun = SBP2_MAX_CMDS,
2627 .can_queue = SBP2_MAX_CMDS,
2628 .emulated = 1,
2629 .sdev_attrs = sbp2_sysfs_sdev_attrs,
2630};
2631
2632static int sbp2_module_init(void)
2633{
2634 int ret;
2635
2636 SBP2_DEBUG("sbp2_module_init");
2637
1da177e4
LT		 2638 /* Module load debug option to force one command at a time (serializing I/O) */
2639 if (serialize_io) {
2bab359a
JM		 2640 SBP2_INFO("Driver forced to serialize I/O (serialize_io=1)");
2641 SBP2_INFO("Try serialize_io=0 for better performance");
1da177e4
LT		 2642 scsi_driver_template.can_queue = 1;
2643 scsi_driver_template.cmd_per_lun = 1;
2644 }
2645
2646 /* Set max sectors (module load option). Default is 255 sectors. */
2647 scsi_driver_template.max_sectors = max_sectors;
2648
1da177e4
LT		 2649 /* Register our high level driver with 1394 stack */
2650 hpsb_register_highlevel(&sbp2_highlevel);
2651
2652 ret = hpsb_register_protocol(&sbp2_driver);
2653 if (ret) {
2654 SBP2_ERR("Failed to register protocol");
2655 hpsb_unregister_highlevel(&sbp2_highlevel);
2656 return ret;
2657 }
2658
2659 return 0;
2660}
2661
2662static void __exit sbp2_module_exit(void)
2663{
2664 SBP2_DEBUG("sbp2_module_exit");
2665
2666 hpsb_unregister_protocol(&sbp2_driver);
2667
2668 hpsb_unregister_highlevel(&sbp2_highlevel);
2669}
2670
2671module_init(sbp2_module_init);
2672module_exit(sbp2_module_exit);
kernel source for telekom puls (alcatel/mediatek)