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_host.h>
69
70 #include "csr1212.h"
71 #include "ieee1394.h"
72 #include "ieee1394_types.h"
73 #include "ieee1394_core.h"
74 #include "nodemgr.h"
75 #include "hosts.h"
76 #include "highlevel.h"
77 #include "ieee1394_transactions.h"
78 #include "sbp2.h"
79
80 static char version[] __devinitdata =
81 "$Rev: 1219 $ Ben Collins <bcollins@debian.org>";
82
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 */
95 static int max_speed = IEEE1394_SPEED_MAX;
96 module_param(max_speed, int, 0644);
97 MODULE_PARM_DESC(max_speed, "Force max speed (3 = 800mb, 2 = 400mb default, 1 = 200mb, 0 = 100mb)");
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.
103 */
104 static int serialize_io = 0;
105 module_param(serialize_io, int, 0444);
106 MODULE_PARM_DESC(serialize_io, "Serialize all I/O coming down from the scsi drivers (default = 0)");
107
108 /*
109 * Bump up max_sectors if you'd like to support very large sized
110 * transfers. Please note that some older sbp2 bridge chips are broken for
111 * transfers greater or equal to 128KB. Default is a value of 255
112 * sectors, or just under 128KB (at 512 byte sector size). I can note that
113 * the Oxsemi sbp2 chipsets have no problems supporting very large
114 * transfer sizes.
115 */
116 static int max_sectors = SBP2_MAX_SECTORS;
117 module_param(max_sectors, int, 0444);
118 MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported (default = 255)");
119
120 /*
121 * Exclusive login to sbp2 device? In most cases, the sbp2 driver should
122 * do an exclusive login, as it's generally unsafe to have two hosts
123 * talking to a single sbp2 device at the same time (filesystem coherency,
124 * etc.). If you're running an sbp2 device that supports multiple logins,
125 * and you're either running read-only filesystems or some sort of special
126 * filesystem supporting multiple hosts (one such filesystem is OpenGFS,
127 * see opengfs.sourceforge.net for more info), then set exclusive_login
128 * to zero. Note: The Oxsemi OXFW911 sbp2 chipset supports up to four
129 * concurrent logins.
130 */
131 static int exclusive_login = 1;
132 module_param(exclusive_login, int, 0644);
133 MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device (default = 1)");
134
135 /*
136 * SCSI inquiry hack for really badly behaved sbp2 devices. Turn this on
137 * if your sbp2 device is not properly handling the SCSI inquiry command.
138 * This hack makes the inquiry look more like a typical MS Windows
139 * inquiry.
140 *
141 * If force_inquiry_hack=1 is required for your device to work,
142 * please submit the logged sbp2_firmware_revision value of this device to
143 * the linux1394-devel mailing list.
144 */
145 static int force_inquiry_hack = 0;
146 module_param(force_inquiry_hack, int, 0444);
147 MODULE_PARM_DESC(force_inquiry_hack, "Force SCSI inquiry hack (default = 0)");
148
149
150 /*
151 * Export information about protocols/devices supported by this driver.
152 */
153 static struct ieee1394_device_id sbp2_id_table[] = {
154 {
155 .match_flags =IEEE1394_MATCH_SPECIFIER_ID |
156 IEEE1394_MATCH_VERSION,
157 .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff,
158 .version = SBP2_SW_VERSION_ENTRY & 0xffffff
159 },
160 { }
161 };
162
163 MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table);
164
165 /*
166 * Debug levels, configured via kernel config, or enable here.
167 */
168
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)
177 static 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)
193 static 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
218
219 /*
220 * Globals
221 */
222
223 static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id,
224 u32 status);
225
226 static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id,
227 u32 scsi_status, Scsi_Cmnd *SCpnt,
228 void (*done)(Scsi_Cmnd *));
229
230 static Scsi_Host_Template scsi_driver_template;
231
232 const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC };
233
234 static void sbp2_host_reset(struct hpsb_host *host);
235
236 static int sbp2_probe(struct device *dev);
237 static int sbp2_remove(struct device *dev);
238 static int sbp2_update(struct unit_directory *ud);
239
240 static struct hpsb_highlevel sbp2_highlevel = {
241 .name = SBP2_DEVICE_NAME,
242 .host_reset = sbp2_host_reset,
243 };
244
245 static struct hpsb_address_ops sbp2_ops = {
246 .write = sbp2_handle_status_write
247 };
248
249 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
250 static struct hpsb_address_ops sbp2_physdma_ops = {
251 .read = sbp2_handle_physdma_read,
252 .write = sbp2_handle_physdma_write,
253 };
254 #endif
255
256 static struct hpsb_protocol_driver sbp2_driver = {
257 .name = "SBP2 Driver",
258 .id_table = sbp2_id_table,
259 .update = sbp2_update,
260 .driver = {
261 .name = SBP2_DEVICE_NAME,
262 .bus = &ieee1394_bus_type,
263 .probe = sbp2_probe,
264 .remove = sbp2_remove,
265 },
266 };
267
268
269 /* List of device firmware's that require a forced 36 byte inquiry. */
270 static u32 sbp2_broken_inquiry_list[] = {
271 0x00002800, /* Stefan Richter <richtest@bauwesen.tu-cottbus.de> */
272 /* DViCO Momobay CX-1 */
273 0x00000200 /* Andreas Plesch <plesch@fas.harvard.edu> */
274 /* QPS Fire DVDBurner */
275 };
276
277 #define NUM_BROKEN_INQUIRY_DEVS \
278 (sizeof(sbp2_broken_inquiry_list)/sizeof(*sbp2_broken_inquiry_list))
279
280 /**************************************
281 * General utility functions
282 **************************************/
283
284
285 #ifndef __BIG_ENDIAN
286 /*
287 * Converts a buffer from be32 to cpu byte ordering. Length is in bytes.
288 */
289 static __inline__ void sbp2util_be32_to_cpu_buffer(void *buffer, int length)
290 {
291 u32 *temp = buffer;
292
293 for (length = (length >> 2); length--; )
294 temp[length] = be32_to_cpu(temp[length]);
295
296 return;
297 }
298
299 /*
300 * Converts a buffer from cpu to be32 byte ordering. Length is in bytes.
301 */
302 static __inline__ void sbp2util_cpu_to_be32_buffer(void *buffer, int length)
303 {
304 u32 *temp = buffer;
305
306 for (length = (length >> 2); length--; )
307 temp[length] = cpu_to_be32(temp[length]);
308
309 return;
310 }
311 #else /* BIG_ENDIAN */
312 /* Why waste the cpu cycles? */
313 #define sbp2util_be32_to_cpu_buffer(x,y)
314 #define sbp2util_cpu_to_be32_buffer(x,y)
315 #endif
316
317 #ifdef CONFIG_IEEE1394_SBP2_PACKET_DUMP
318 /*
319 * Debug packet dump routine. Length is in bytes.
320 */
321 static void sbp2util_packet_dump(void *buffer, int length, char *dump_name, u32 dump_phys_addr)
322 {
323 int i;
324 unsigned char *dump = buffer;
325
326 if (!dump || !length || !dump_name)
327 return;
328
329 if (dump_phys_addr)
330 printk("[%s, 0x%x]", dump_name, dump_phys_addr);
331 else
332 printk("[%s]", dump_name);
333 for (i = 0; i < length; i++) {
334 if (i > 0x3f) {
335 printk("\n ...");
336 break;
337 }
338 if ((i & 0x3) == 0)
339 printk(" ");
340 if ((i & 0xf) == 0)
341 printk("\n ");
342 printk("%02x ", (int) dump[i]);
343 }
344 printk("\n");
345
346 return;
347 }
348 #else
349 #define sbp2util_packet_dump(w,x,y,z)
350 #endif
351
352 /*
353 * Goofy routine that basically does a down_timeout function.
354 */
355 static int sbp2util_down_timeout(atomic_t *done, int timeout)
356 {
357 int i;
358
359 for (i = timeout; (i > 0 && atomic_read(done) == 0); i-= HZ/10) {
360 if (msleep_interruptible(100)) /* 100ms */
361 return(1);
362 }
363 return ((i > 0) ? 0:1);
364 }
365
366 /* Free's an allocated packet */
367 static void sbp2_free_packet(struct hpsb_packet *packet)
368 {
369 hpsb_free_tlabel(packet);
370 hpsb_free_packet(packet);
371 }
372
373 /* This is much like hpsb_node_write(), except it ignores the response
374 * subaction and returns immediately. Can be used from interrupts.
375 */
376 int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr,
377 quadlet_t *buffer, size_t length)
378 {
379 struct hpsb_packet *packet;
380
381 packet = hpsb_make_writepacket(ne->host, ne->nodeid,
382 addr, buffer, length);
383 if (!packet)
384 return -ENOMEM;
385
386 hpsb_set_packet_complete_task(packet, (void (*)(void*))sbp2_free_packet,
387 packet);
388
389 hpsb_node_fill_packet(ne, packet);
390
391 if (hpsb_send_packet(packet) < 0) {
392 sbp2_free_packet(packet);
393 return -EIO;
394 }
395
396 return 0;
397 }
398
399 /*
400 * This function is called to create a pool of command orbs used for
401 * command processing. It is called when a new sbp2 device is detected.
402 */
403 static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data *scsi_id)
404 {
405 struct sbp2scsi_host_info *hi = scsi_id->hi;
406 int i;
407 unsigned long flags, orbs;
408 struct sbp2_command_info *command;
409
410 orbs = serialize_io ? 2 : SBP2_MAX_CMDS;
411
412 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
413 for (i = 0; i < orbs; i++) {
414 command = (struct sbp2_command_info *)
415 kmalloc(sizeof(struct sbp2_command_info), GFP_ATOMIC);
416 if (!command) {
417 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
418 return(-ENOMEM);
419 }
420 memset(command, '\0', sizeof(struct sbp2_command_info));
421 command->command_orb_dma =
422 pci_map_single (hi->host->pdev, &command->command_orb,
423 sizeof(struct sbp2_command_orb),
424 PCI_DMA_BIDIRECTIONAL);
425 SBP2_DMA_ALLOC("single command orb DMA");
426 command->sge_dma =
427 pci_map_single (hi->host->pdev, &command->scatter_gather_element,
428 sizeof(command->scatter_gather_element),
429 PCI_DMA_BIDIRECTIONAL);
430 SBP2_DMA_ALLOC("scatter_gather_element");
431 INIT_LIST_HEAD(&command->list);
432 list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed);
433 }
434 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
435 return 0;
436 }
437
438 /*
439 * This function is called to delete a pool of command orbs.
440 */
441 static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data *scsi_id)
442 {
443 struct hpsb_host *host = scsi_id->hi->host;
444 struct list_head *lh, *next;
445 struct sbp2_command_info *command;
446 unsigned long flags;
447
448 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
449 if (!list_empty(&scsi_id->sbp2_command_orb_completed)) {
450 list_for_each_safe(lh, next, &scsi_id->sbp2_command_orb_completed) {
451 command = list_entry(lh, struct sbp2_command_info, list);
452
453 /* Release our generic DMA's */
454 pci_unmap_single(host->pdev, command->command_orb_dma,
455 sizeof(struct sbp2_command_orb),
456 PCI_DMA_BIDIRECTIONAL);
457 SBP2_DMA_FREE("single command orb DMA");
458 pci_unmap_single(host->pdev, command->sge_dma,
459 sizeof(command->scatter_gather_element),
460 PCI_DMA_BIDIRECTIONAL);
461 SBP2_DMA_FREE("scatter_gather_element");
462
463 kfree(command);
464 }
465 }
466 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
467 return;
468 }
469
470 /*
471 * This function finds the sbp2_command for a given outstanding command
472 * orb.Only looks at the inuse list.
473 */
474 static struct sbp2_command_info *sbp2util_find_command_for_orb(
475 struct scsi_id_instance_data *scsi_id, dma_addr_t orb)
476 {
477 struct sbp2_command_info *command;
478 unsigned long flags;
479
480 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
481 if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) {
482 list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) {
483 if (command->command_orb_dma == orb) {
484 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
485 return (command);
486 }
487 }
488 }
489 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
490
491 SBP2_ORB_DEBUG("could not match command orb %x", (unsigned int)orb);
492
493 return(NULL);
494 }
495
496 /*
497 * This function finds the sbp2_command for a given outstanding SCpnt.
498 * Only looks at the inuse list.
499 */
500 static struct sbp2_command_info *sbp2util_find_command_for_SCpnt(struct scsi_id_instance_data *scsi_id, void *SCpnt)
501 {
502 struct sbp2_command_info *command;
503 unsigned long flags;
504
505 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
506 if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) {
507 list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) {
508 if (command->Current_SCpnt == SCpnt) {
509 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
510 return (command);
511 }
512 }
513 }
514 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
515 return(NULL);
516 }
517
518 /*
519 * This function allocates a command orb used to send a scsi command.
520 */
521 static struct sbp2_command_info *sbp2util_allocate_command_orb(
522 struct scsi_id_instance_data *scsi_id,
523 Scsi_Cmnd *Current_SCpnt,
524 void (*Current_done)(Scsi_Cmnd *))
525 {
526 struct list_head *lh;
527 struct sbp2_command_info *command = NULL;
528 unsigned long flags;
529
530 spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
531 if (!list_empty(&scsi_id->sbp2_command_orb_completed)) {
532 lh = scsi_id->sbp2_command_orb_completed.next;
533 list_del(lh);
534 command = list_entry(lh, struct sbp2_command_info, list);
535 command->Current_done = Current_done;
536 command->Current_SCpnt = Current_SCpnt;
537 list_add_tail(&command->list, &scsi_id->sbp2_command_orb_inuse);
538 } else {
539 SBP2_ERR("sbp2util_allocate_command_orb - No orbs available!");
540 }
541 spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
542 return (command);
543 }
544
545 /* Free our DMA's */
546 static void sbp2util_free_command_dma(struct sbp2_command_info *command)
547 {
548 struct scsi_id_instance_data *scsi_id =
549 (struct scsi_id_instance_data *)command->Current_SCpnt->device->host->hostdata[0];
550 struct hpsb_host *host;
551
552 if (!scsi_id) {
553 printk(KERN_ERR "%s: scsi_id == NULL\n", __FUNCTION__);
554 return;
555 }
556
557 host = scsi_id->ud->ne->host;
558
559 if (command->cmd_dma) {
560 if (command->dma_type == CMD_DMA_SINGLE) {
561 pci_unmap_single(host->pdev, command->cmd_dma,
562 command->dma_size, command->dma_dir);
563 SBP2_DMA_FREE("single bulk");
564 } else if (command->dma_type == CMD_DMA_PAGE) {
565 pci_unmap_page(host->pdev, command->cmd_dma,
566 command->dma_size, command->dma_dir);
567 SBP2_DMA_FREE("single page");
568 } /* XXX: Check for CMD_DMA_NONE bug */
569 command->dma_type = CMD_DMA_NONE;
570 command->cmd_dma = 0;
571 }
572
573 if (command->sge_buffer) {
574 pci_unmap_sg(host->pdev, command->sge_buffer,
575 command->dma_size, command->dma_dir);
576 SBP2_DMA_FREE("scatter list");
577 command->sge_buffer = NULL;
578 }
579 }
580
581 /*
582 * This function moves a command to the completed orb list.
583 */
584 static void sbp2util_mark_command_completed(struct scsi_id_instance_data *scsi_id, struct sbp2_command_info *command)
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
595
596
597 /*********************************************
598 * IEEE-1394 core driver stack related section
599 *********************************************/
600 static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud);
601
602 static int sbp2_probe(struct device *dev)
603 {
604 struct unit_directory *ud;
605 struct scsi_id_instance_data *scsi_id;
606
607 SBP2_DEBUG("sbp2_probe");
608
609 ud = container_of(dev, struct unit_directory, device);
610
611 /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s)
612 * instead. */
613 if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY)
614 return -ENODEV;
615
616 scsi_id = sbp2_alloc_device(ud);
617
618 if (!scsi_id)
619 return -ENOMEM;
620
621 sbp2_parse_unit_directory(scsi_id, ud);
622
623 return sbp2_start_device(scsi_id);
624 }
625
626 static int sbp2_remove(struct device *dev)
627 {
628 struct unit_directory *ud;
629 struct scsi_id_instance_data *scsi_id;
630
631 SBP2_DEBUG("sbp2_remove");
632
633 ud = container_of(dev, struct unit_directory, device);
634 scsi_id = ud->device.driver_data;
635
636 sbp2_logout_device(scsi_id);
637 sbp2_remove_device(scsi_id);
638
639 return 0;
640 }
641
642 static int sbp2_update(struct unit_directory *ud)
643 {
644 struct scsi_id_instance_data *scsi_id = ud->device.driver_data;
645
646 SBP2_DEBUG("sbp2_update");
647
648 if (sbp2_reconnect_device(scsi_id)) {
649
650 /*
651 * Ok, reconnect has failed. Perhaps we didn't
652 * reconnect fast enough. Try doing a regular login, but
653 * first do a logout just in case of any weirdness.
654 */
655 sbp2_logout_device(scsi_id);
656
657 if (sbp2_login_device(scsi_id)) {
658 /* Login failed too, just fail, and the backend
659 * will call our sbp2_remove for us */
660 SBP2_ERR("Failed to reconnect to sbp2 device!");
661 return -EBUSY;
662 }
663 }
664
665 /* Set max retries to something large on the device. */
666 sbp2_set_busy_timeout(scsi_id);
667
668 /* Do a SBP-2 fetch agent reset. */
669 sbp2_agent_reset(scsi_id, 1);
670
671 /* Get the max speed and packet size that we can use. */
672 sbp2_max_speed_and_size(scsi_id);
673
674 /* Complete any pending commands with busy (so they get
675 * retried) and remove them from our queue
676 */
677 sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY);
678
679 /* Make sure we unblock requests (since this is likely after a bus
680 * reset). */
681 scsi_unblock_requests(scsi_id->scsi_host);
682
683 return 0;
684 }
685
686 /* This functions is called by the sbp2_probe, for each new device. We now
687 * allocate one scsi host for each scsi_id (unit directory). */
688 static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud)
689 {
690 struct sbp2scsi_host_info *hi;
691 struct Scsi_Host *scsi_host = NULL;
692 struct scsi_id_instance_data *scsi_id = NULL;
693
694 SBP2_DEBUG("sbp2_alloc_device");
695
696 scsi_id = kmalloc(sizeof(*scsi_id), GFP_KERNEL);
697 if (!scsi_id) {
698 SBP2_ERR("failed to create scsi_id");
699 goto failed_alloc;
700 }
701 memset(scsi_id, 0, sizeof(*scsi_id));
702
703 scsi_id->ne = ud->ne;
704 scsi_id->ud = ud;
705 scsi_id->speed_code = IEEE1394_SPEED_100;
706 scsi_id->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100];
707 atomic_set(&scsi_id->sbp2_login_complete, 0);
708 INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_inuse);
709 INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_completed);
710 INIT_LIST_HEAD(&scsi_id->scsi_list);
711 spin_lock_init(&scsi_id->sbp2_command_orb_lock);
712 scsi_id->sbp2_device_type_and_lun = SBP2_DEVICE_TYPE_LUN_UNINITIALIZED;
713
714 ud->device.driver_data = scsi_id;
715
716 hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host);
717 if (!hi) {
718 hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host, sizeof(*hi));
719 if (!hi) {
720 SBP2_ERR("failed to allocate hostinfo");
721 goto failed_alloc;
722 }
723 SBP2_DEBUG("sbp2_alloc_device: allocated hostinfo");
724 hi->host = ud->ne->host;
725 INIT_LIST_HEAD(&hi->scsi_ids);
726
727 /* Register our sbp2 status address space... */
728 hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, &sbp2_ops,
729 SBP2_STATUS_FIFO_ADDRESS,
730 SBP2_STATUS_FIFO_ADDRESS +
731 SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(SBP2_MAX_UDS_PER_NODE+1));
732 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
733 /* Handle data movement if physical dma is not
734 * enabled/supportedon host controller */
735 hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, &sbp2_physdma_ops,
736 0x0ULL, 0xfffffffcULL);
737 #endif
738 }
739
740 scsi_id->hi = hi;
741
742 list_add_tail(&scsi_id->scsi_list, &hi->scsi_ids);
743
744 /* Register our host with the SCSI stack. */
745 scsi_host = scsi_host_alloc(&scsi_driver_template, 0);
746 if (!scsi_host) {
747 SBP2_ERR("failed to register scsi host");
748 goto failed_alloc;
749 }
750
751 scsi_host->hostdata[0] = (unsigned long)scsi_id;
752
753 if (!scsi_add_host(scsi_host, &ud->device)) {
754 scsi_id->scsi_host = scsi_host;
755 return scsi_id;
756 }
757
758 SBP2_ERR("failed to add scsi host");
759 scsi_host_put(scsi_host);
760
761 failed_alloc:
762 sbp2_remove_device(scsi_id);
763 return NULL;
764 }
765
766
767 static void sbp2_host_reset(struct hpsb_host *host)
768 {
769 struct sbp2scsi_host_info *hi;
770 struct scsi_id_instance_data *scsi_id;
771
772 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
773
774 if (hi) {
775 list_for_each_entry(scsi_id, &hi->scsi_ids, scsi_list)
776 scsi_block_requests(scsi_id->scsi_host);
777 }
778 }
779
780
781 /*
782 * This function is where we first pull the node unique ids, and then
783 * allocate memory and register a SBP-2 device.
784 */
785 static int sbp2_start_device(struct scsi_id_instance_data *scsi_id)
786 {
787 struct sbp2scsi_host_info *hi = scsi_id->hi;
788 struct scsi_device *sdev;
789
790 SBP2_DEBUG("sbp2_start_device");
791
792 /* Login FIFO DMA */
793 scsi_id->login_response =
794 pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_login_response),
795 &scsi_id->login_response_dma);
796 if (!scsi_id->login_response)
797 goto alloc_fail;
798 SBP2_DMA_ALLOC("consistent DMA region for login FIFO");
799
800 /* Query logins ORB DMA */
801 scsi_id->query_logins_orb =
802 pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_query_logins_orb),
803 &scsi_id->query_logins_orb_dma);
804 if (!scsi_id->query_logins_orb)
805 goto alloc_fail;
806 SBP2_DMA_ALLOC("consistent DMA region for query logins ORB");
807
808 /* Query logins response DMA */
809 scsi_id->query_logins_response =
810 pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_query_logins_response),
811 &scsi_id->query_logins_response_dma);
812 if (!scsi_id->query_logins_response)
813 goto alloc_fail;
814 SBP2_DMA_ALLOC("consistent DMA region for query logins response");
815
816 /* Reconnect ORB DMA */
817 scsi_id->reconnect_orb =
818 pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_reconnect_orb),
819 &scsi_id->reconnect_orb_dma);
820 if (!scsi_id->reconnect_orb)
821 goto alloc_fail;
822 SBP2_DMA_ALLOC("consistent DMA region for reconnect ORB");
823
824 /* Logout ORB DMA */
825 scsi_id->logout_orb =
826 pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_logout_orb),
827 &scsi_id->logout_orb_dma);
828 if (!scsi_id->logout_orb)
829 goto alloc_fail;
830 SBP2_DMA_ALLOC("consistent DMA region for logout ORB");
831
832 /* Login ORB DMA */
833 scsi_id->login_orb =
834 pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_login_orb),
835 &scsi_id->login_orb_dma);
836 if (!scsi_id->login_orb) {
837 alloc_fail:
838 if (scsi_id->query_logins_response) {
839 pci_free_consistent(hi->host->pdev,
840 sizeof(struct sbp2_query_logins_response),
841 scsi_id->query_logins_response,
842 scsi_id->query_logins_response_dma);
843 SBP2_DMA_FREE("query logins response DMA");
844 }
845
846 if (scsi_id->query_logins_orb) {
847 pci_free_consistent(hi->host->pdev,
848 sizeof(struct sbp2_query_logins_orb),
849 scsi_id->query_logins_orb,
850 scsi_id->query_logins_orb_dma);
851 SBP2_DMA_FREE("query logins ORB DMA");
852 }
853
854 if (scsi_id->logout_orb) {
855 pci_free_consistent(hi->host->pdev,
856 sizeof(struct sbp2_logout_orb),
857 scsi_id->logout_orb,
858 scsi_id->logout_orb_dma);
859 SBP2_DMA_FREE("logout ORB DMA");
860 }
861
862 if (scsi_id->reconnect_orb) {
863 pci_free_consistent(hi->host->pdev,
864 sizeof(struct sbp2_reconnect_orb),
865 scsi_id->reconnect_orb,
866 scsi_id->reconnect_orb_dma);
867 SBP2_DMA_FREE("reconnect ORB DMA");
868 }
869
870 if (scsi_id->login_response) {
871 pci_free_consistent(hi->host->pdev,
872 sizeof(struct sbp2_login_response),
873 scsi_id->login_response,
874 scsi_id->login_response_dma);
875 SBP2_DMA_FREE("login FIFO DMA");
876 }
877
878 list_del(&scsi_id->scsi_list);
879
880 kfree(scsi_id);
881
882 SBP2_ERR ("Could not allocate memory for scsi_id");
883
884 return -ENOMEM;
885 }
886 SBP2_DMA_ALLOC("consistent DMA region for login ORB");
887
888 SBP2_DEBUG("New SBP-2 device inserted, SCSI ID = %x", scsi_id->ud->id);
889
890 /*
891 * Create our command orb pool
892 */
893 if (sbp2util_create_command_orb_pool(scsi_id)) {
894 SBP2_ERR("sbp2util_create_command_orb_pool failed!");
895 sbp2_remove_device(scsi_id);
896 return -ENOMEM;
897 }
898
899 /* Schedule a timeout here. The reason is that we may be so close
900 * to a bus reset, that the device is not available for logins.
901 * This can happen when the bus reset is caused by the host
902 * connected to the sbp2 device being removed. That host would
903 * have a certain amount of time to relogin before the sbp2 device
904 * allows someone else to login instead. One second makes sense. */
905 set_current_state(TASK_INTERRUPTIBLE);
906 schedule_timeout(HZ);
907
908 /*
909 * Login to the sbp-2 device
910 */
911 if (sbp2_login_device(scsi_id)) {
912 /* Login failed, just remove the device. */
913 sbp2_remove_device(scsi_id);
914 return -EBUSY;
915 }
916
917 /*
918 * Set max retries to something large on the device
919 */
920 sbp2_set_busy_timeout(scsi_id);
921
922 /*
923 * Do a SBP-2 fetch agent reset
924 */
925 sbp2_agent_reset(scsi_id, 1);
926
927 /*
928 * Get the max speed and packet size that we can use
929 */
930 sbp2_max_speed_and_size(scsi_id);
931
932 /* Add this device to the scsi layer now */
933 sdev = scsi_add_device(scsi_id->scsi_host, 0, scsi_id->ud->id, 0);
934 if (IS_ERR(sdev)) {
935 SBP2_ERR("scsi_add_device failed");
936 return PTR_ERR(sdev);
937 }
938
939 return 0;
940 }
941
942 /*
943 * This function removes an sbp2 device from the sbp2scsi_host_info struct.
944 */
945 static void sbp2_remove_device(struct scsi_id_instance_data *scsi_id)
946 {
947 struct sbp2scsi_host_info *hi;
948
949 SBP2_DEBUG("sbp2_remove_device");
950
951 if (!scsi_id)
952 return;
953
954 hi = scsi_id->hi;
955
956 /* This will remove our scsi device aswell */
957 if (scsi_id->scsi_host) {
958 scsi_remove_host(scsi_id->scsi_host);
959 scsi_host_put(scsi_id->scsi_host);
960 }
961
962 sbp2util_remove_command_orb_pool(scsi_id);
963
964 list_del(&scsi_id->scsi_list);
965
966 if (scsi_id->login_response) {
967 pci_free_consistent(hi->host->pdev,
968 sizeof(struct sbp2_login_response),
969 scsi_id->login_response,
970 scsi_id->login_response_dma);
971 SBP2_DMA_FREE("single login FIFO");
972 }
973
974 if (scsi_id->login_orb) {
975 pci_free_consistent(hi->host->pdev,
976 sizeof(struct sbp2_login_orb),
977 scsi_id->login_orb,
978 scsi_id->login_orb_dma);
979 SBP2_DMA_FREE("single login ORB");
980 }
981
982 if (scsi_id->reconnect_orb) {
983 pci_free_consistent(hi->host->pdev,
984 sizeof(struct sbp2_reconnect_orb),
985 scsi_id->reconnect_orb,
986 scsi_id->reconnect_orb_dma);
987 SBP2_DMA_FREE("single reconnect orb");
988 }
989
990 if (scsi_id->logout_orb) {
991 pci_free_consistent(hi->host->pdev,
992 sizeof(struct sbp2_logout_orb),
993 scsi_id->logout_orb,
994 scsi_id->logout_orb_dma);
995 SBP2_DMA_FREE("single logout orb");
996 }
997
998 if (scsi_id->query_logins_orb) {
999 pci_free_consistent(hi->host->pdev,
1000 sizeof(struct sbp2_query_logins_orb),
1001 scsi_id->query_logins_orb,
1002 scsi_id->query_logins_orb_dma);
1003 SBP2_DMA_FREE("single query logins orb");
1004 }
1005
1006 if (scsi_id->query_logins_response) {
1007 pci_free_consistent(hi->host->pdev,
1008 sizeof(struct sbp2_query_logins_response),
1009 scsi_id->query_logins_response,
1010 scsi_id->query_logins_response_dma);
1011 SBP2_DMA_FREE("single query logins data");
1012 }
1013
1014 scsi_id->ud->device.driver_data = NULL;
1015
1016 SBP2_DEBUG("SBP-2 device removed, SCSI ID = %d", scsi_id->ud->id);
1017
1018 kfree(scsi_id);
1019 }
1020
1021 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
1022 /*
1023 * This function deals with physical dma write requests (for adapters that do not support
1024 * physical dma in hardware). Mostly just here for debugging...
1025 */
1026 static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid, int destid, quadlet_t *data,
1027 u64 addr, size_t length, u16 flags)
1028 {
1029
1030 /*
1031 * Manually put the data in the right place.
1032 */
1033 memcpy(bus_to_virt((u32)addr), data, length);
1034 sbp2util_packet_dump(data, length, "sbp2 phys dma write by device", (u32)addr);
1035 return(RCODE_COMPLETE);
1036 }
1037
1038 /*
1039 * This function deals with physical dma read requests (for adapters that do not support
1040 * physical dma in hardware). Mostly just here for debugging...
1041 */
1042 static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid, quadlet_t *data,
1043 u64 addr, size_t length, u16 flags)
1044 {
1045
1046 /*
1047 * Grab data from memory and send a read response.
1048 */
1049 memcpy(data, bus_to_virt((u32)addr), length);
1050 sbp2util_packet_dump(data, length, "sbp2 phys dma read by device", (u32)addr);
1051 return(RCODE_COMPLETE);
1052 }
1053 #endif
1054
1055
1056 /**************************************
1057 * SBP-2 protocol related section
1058 **************************************/
1059
1060 /*
1061 * This function determines if we should convert scsi commands for a particular sbp2 device type
1062 */
1063 static __inline__ int sbp2_command_conversion_device_type(u8 device_type)
1064 {
1065 return (((device_type == TYPE_DISK) ||
1066 (device_type == TYPE_SDAD) ||
1067 (device_type == TYPE_ROM)) ? 1:0);
1068 }
1069
1070 /*
1071 * This function queries the device for the maximum concurrent logins it
1072 * supports.
1073 */
1074 static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id)
1075 {
1076 struct sbp2scsi_host_info *hi = scsi_id->hi;
1077 quadlet_t data[2];
1078 int max_logins;
1079 int active_logins;
1080
1081 SBP2_DEBUG("sbp2_query_logins");
1082
1083 scsi_id->query_logins_orb->reserved1 = 0x0;
1084 scsi_id->query_logins_orb->reserved2 = 0x0;
1085
1086 scsi_id->query_logins_orb->query_response_lo = scsi_id->query_logins_response_dma;
1087 scsi_id->query_logins_orb->query_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
1088 SBP2_DEBUG("sbp2_query_logins: query_response_hi/lo initialized");
1089
1090 scsi_id->query_logins_orb->lun_misc = ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST);
1091 scsi_id->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1);
1092 if (scsi_id->sbp2_device_type_and_lun != SBP2_DEVICE_TYPE_LUN_UNINITIALIZED) {
1093 scsi_id->query_logins_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun);
1094 SBP2_DEBUG("sbp2_query_logins: set lun to %d",
1095 ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun));
1096 }
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
1103 scsi_id->query_logins_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO +
1104 SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id);
1105 scsi_id->query_logins_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) |
1106 SBP2_STATUS_FIFO_ADDRESS_HI);
1107 SBP2_DEBUG("sbp2_query_logins: status FIFO initialized");
1108
1109 sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb));
1110
1111 SBP2_DEBUG("sbp2_query_logins: orb byte-swapped");
1112
1113 sbp2util_packet_dump(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb),
1114 "sbp2 query logins orb", scsi_id->query_logins_orb_dma);
1115
1116 memset(scsi_id->query_logins_response, 0, sizeof(struct sbp2_query_logins_response));
1117 memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
1118
1119 SBP2_DEBUG("sbp2_query_logins: query_logins_response/status FIFO memset");
1120
1121 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1122 data[1] = scsi_id->query_logins_orb_dma;
1123 sbp2util_cpu_to_be32_buffer(data, 8);
1124
1125 atomic_set(&scsi_id->sbp2_login_complete, 0);
1126
1127 SBP2_DEBUG("sbp2_query_logins: prepared to write");
1128 hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8);
1129 SBP2_DEBUG("sbp2_query_logins: written");
1130
1131 if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 2*HZ)) {
1132 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1133 return(-EIO);
1134 }
1135
1136 if (scsi_id->status_block.ORB_offset_lo != scsi_id->query_logins_orb_dma) {
1137 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1138 return(-EIO);
1139 }
1140
1141 if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
1142 STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
1143 STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
1144
1145 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1146 return(-EIO);
1147 }
1148
1149 sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_response, sizeof(struct sbp2_query_logins_response));
1150
1151 SBP2_DEBUG("length_max_logins = %x",
1152 (unsigned int)scsi_id->query_logins_response->length_max_logins);
1153
1154 SBP2_DEBUG("Query logins to SBP-2 device successful");
1155
1156 max_logins = RESPONSE_GET_MAX_LOGINS(scsi_id->query_logins_response->length_max_logins);
1157 SBP2_DEBUG("Maximum concurrent logins supported: %d", max_logins);
1158
1159 active_logins = RESPONSE_GET_ACTIVE_LOGINS(scsi_id->query_logins_response->length_max_logins);
1160 SBP2_DEBUG("Number of active logins: %d", active_logins);
1161
1162 if (active_logins >= max_logins) {
1163 return(-EIO);
1164 }
1165
1166 return 0;
1167 }
1168
1169 /*
1170 * This function is called in order to login to a particular SBP-2 device,
1171 * after a bus reset.
1172 */
1173 static int sbp2_login_device(struct scsi_id_instance_data *scsi_id)
1174 {
1175 struct sbp2scsi_host_info *hi = scsi_id->hi;
1176 quadlet_t data[2];
1177
1178 SBP2_DEBUG("sbp2_login_device");
1179
1180 if (!scsi_id->login_orb) {
1181 SBP2_DEBUG("sbp2_login_device: login_orb not alloc'd!");
1182 return(-EIO);
1183 }
1184
1185 if (!exclusive_login) {
1186 if (sbp2_query_logins(scsi_id)) {
1187 SBP2_INFO("Device does not support any more concurrent logins");
1188 return(-EIO);
1189 }
1190 }
1191
1192 /* Set-up login ORB, assume no password */
1193 scsi_id->login_orb->password_hi = 0;
1194 scsi_id->login_orb->password_lo = 0;
1195 SBP2_DEBUG("sbp2_login_device: password_hi/lo initialized");
1196
1197 scsi_id->login_orb->login_response_lo = scsi_id->login_response_dma;
1198 scsi_id->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
1199 SBP2_DEBUG("sbp2_login_device: login_response_hi/lo initialized");
1200
1201 scsi_id->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST);
1202 scsi_id->login_orb->lun_misc |= ORB_SET_RECONNECT(0); /* One second reconnect time */
1203 scsi_id->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(exclusive_login); /* Exclusive access to device */
1204 scsi_id->login_orb->lun_misc |= ORB_SET_NOTIFY(1); /* Notify us of login complete */
1205 /* Set the lun if we were able to pull it from the device's unit directory */
1206 if (scsi_id->sbp2_device_type_and_lun != SBP2_DEVICE_TYPE_LUN_UNINITIALIZED) {
1207 scsi_id->login_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun);
1208 SBP2_DEBUG("sbp2_query_logins: set lun to %d",
1209 ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun));
1210 }
1211 SBP2_DEBUG("sbp2_login_device: lun_misc initialized");
1212
1213 scsi_id->login_orb->passwd_resp_lengths =
1214 ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response));
1215 SBP2_DEBUG("sbp2_login_device: passwd_resp_lengths initialized");
1216
1217 scsi_id->login_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO +
1218 SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id);
1219 scsi_id->login_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) |
1220 SBP2_STATUS_FIFO_ADDRESS_HI);
1221 SBP2_DEBUG("sbp2_login_device: status FIFO initialized");
1222
1223 /*
1224 * Byte swap ORB if necessary
1225 */
1226 sbp2util_cpu_to_be32_buffer(scsi_id->login_orb, sizeof(struct sbp2_login_orb));
1227
1228 SBP2_DEBUG("sbp2_login_device: orb byte-swapped");
1229
1230 sbp2util_packet_dump(scsi_id->login_orb, sizeof(struct sbp2_login_orb),
1231 "sbp2 login orb", scsi_id->login_orb_dma);
1232
1233 /*
1234 * Initialize login response and status fifo
1235 */
1236 memset(scsi_id->login_response, 0, sizeof(struct sbp2_login_response));
1237 memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
1238
1239 SBP2_DEBUG("sbp2_login_device: login_response/status FIFO memset");
1240
1241 /*
1242 * Ok, let's write to the target's management agent register
1243 */
1244 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1245 data[1] = scsi_id->login_orb_dma;
1246 sbp2util_cpu_to_be32_buffer(data, 8);
1247
1248 atomic_set(&scsi_id->sbp2_login_complete, 0);
1249
1250 SBP2_DEBUG("sbp2_login_device: prepared to write to %08x",
1251 (unsigned int)scsi_id->sbp2_management_agent_addr);
1252 hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8);
1253 SBP2_DEBUG("sbp2_login_device: written");
1254
1255 /*
1256 * Wait for login status (up to 20 seconds)...
1257 */
1258 if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 20*HZ)) {
1259 SBP2_ERR("Error logging into SBP-2 device - login timed-out");
1260 return(-EIO);
1261 }
1262
1263 /*
1264 * Sanity. Make sure status returned matches login orb.
1265 */
1266 if (scsi_id->status_block.ORB_offset_lo != scsi_id->login_orb_dma) {
1267 SBP2_ERR("Error logging into SBP-2 device - login timed-out");
1268 return(-EIO);
1269 }
1270
1271 /*
1272 * Check status
1273 */
1274 if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
1275 STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
1276 STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
1277
1278 SBP2_ERR("Error logging into SBP-2 device - login failed");
1279 return(-EIO);
1280 }
1281
1282 /*
1283 * Byte swap the login response, for use when reconnecting or
1284 * logging out.
1285 */
1286 sbp2util_cpu_to_be32_buffer(scsi_id->login_response, sizeof(struct sbp2_login_response));
1287
1288 /*
1289 * Grab our command block agent address from the login response.
1290 */
1291 SBP2_DEBUG("command_block_agent_hi = %x",
1292 (unsigned int)scsi_id->login_response->command_block_agent_hi);
1293 SBP2_DEBUG("command_block_agent_lo = %x",
1294 (unsigned int)scsi_id->login_response->command_block_agent_lo);
1295
1296 scsi_id->sbp2_command_block_agent_addr =
1297 ((u64)scsi_id->login_response->command_block_agent_hi) << 32;
1298 scsi_id->sbp2_command_block_agent_addr |= ((u64)scsi_id->login_response->command_block_agent_lo);
1299 scsi_id->sbp2_command_block_agent_addr &= 0x0000ffffffffffffULL;
1300
1301 SBP2_INFO("Logged into SBP-2 device");
1302
1303 return(0);
1304
1305 }
1306
1307 /*
1308 * This function is called in order to logout from a particular SBP-2
1309 * device, usually called during driver unload.
1310 */
1311 static int sbp2_logout_device(struct scsi_id_instance_data *scsi_id)
1312 {
1313 struct sbp2scsi_host_info *hi = scsi_id->hi;
1314 quadlet_t data[2];
1315 int error;
1316
1317 SBP2_DEBUG("sbp2_logout_device");
1318
1319 /*
1320 * Set-up logout ORB
1321 */
1322 scsi_id->logout_orb->reserved1 = 0x0;
1323 scsi_id->logout_orb->reserved2 = 0x0;
1324 scsi_id->logout_orb->reserved3 = 0x0;
1325 scsi_id->logout_orb->reserved4 = 0x0;
1326
1327 scsi_id->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST);
1328 scsi_id->logout_orb->login_ID_misc |= ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID);
1329
1330 /* Notify us when complete */
1331 scsi_id->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1332
1333 scsi_id->logout_orb->reserved5 = 0x0;
1334 scsi_id->logout_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO +
1335 SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id);
1336 scsi_id->logout_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) |
1337 SBP2_STATUS_FIFO_ADDRESS_HI);
1338
1339 /*
1340 * Byte swap ORB if necessary
1341 */
1342 sbp2util_cpu_to_be32_buffer(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb));
1343
1344 sbp2util_packet_dump(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb),
1345 "sbp2 logout orb", scsi_id->logout_orb_dma);
1346
1347 /*
1348 * Ok, let's write to the target's management agent register
1349 */
1350 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1351 data[1] = scsi_id->logout_orb_dma;
1352 sbp2util_cpu_to_be32_buffer(data, 8);
1353
1354 atomic_set(&scsi_id->sbp2_login_complete, 0);
1355
1356 error = hpsb_node_write(scsi_id->ne,
1357 scsi_id->sbp2_management_agent_addr,
1358 data, 8);
1359 if (error)
1360 return error;
1361
1362 /* Wait for device to logout...1 second. */
1363 if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ))
1364 return -EIO;
1365
1366 SBP2_INFO("Logged out of SBP-2 device");
1367
1368 return(0);
1369
1370 }
1371
1372 /*
1373 * This function is called in order to reconnect to a particular SBP-2
1374 * device, after a bus reset.
1375 */
1376 static int sbp2_reconnect_device(struct scsi_id_instance_data *scsi_id)
1377 {
1378 struct sbp2scsi_host_info *hi = scsi_id->hi;
1379 quadlet_t data[2];
1380 int error;
1381
1382 SBP2_DEBUG("sbp2_reconnect_device");
1383
1384 /*
1385 * Set-up reconnect ORB
1386 */
1387 scsi_id->reconnect_orb->reserved1 = 0x0;
1388 scsi_id->reconnect_orb->reserved2 = 0x0;
1389 scsi_id->reconnect_orb->reserved3 = 0x0;
1390 scsi_id->reconnect_orb->reserved4 = 0x0;
1391
1392 scsi_id->reconnect_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST);
1393 scsi_id->reconnect_orb->login_ID_misc |=
1394 ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID);
1395
1396 /* Notify us when complete */
1397 scsi_id->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1);
1398
1399 scsi_id->reconnect_orb->reserved5 = 0x0;
1400 scsi_id->reconnect_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO +
1401 SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id);
1402 scsi_id->reconnect_orb->status_FIFO_hi =
1403 (ORB_SET_NODE_ID(hi->host->node_id) | SBP2_STATUS_FIFO_ADDRESS_HI);
1404
1405 /*
1406 * Byte swap ORB if necessary
1407 */
1408 sbp2util_cpu_to_be32_buffer(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb));
1409
1410 sbp2util_packet_dump(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb),
1411 "sbp2 reconnect orb", scsi_id->reconnect_orb_dma);
1412
1413 /*
1414 * Initialize status fifo
1415 */
1416 memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
1417
1418 /*
1419 * Ok, let's write to the target's management agent register
1420 */
1421 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1422 data[1] = scsi_id->reconnect_orb_dma;
1423 sbp2util_cpu_to_be32_buffer(data, 8);
1424
1425 atomic_set(&scsi_id->sbp2_login_complete, 0);
1426
1427 error = hpsb_node_write(scsi_id->ne,
1428 scsi_id->sbp2_management_agent_addr,
1429 data, 8);
1430 if (error)
1431 return error;
1432
1433 /*
1434 * Wait for reconnect status (up to 1 second)...
1435 */
1436 if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ)) {
1437 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out");
1438 return(-EIO);
1439 }
1440
1441 /*
1442 * Sanity. Make sure status returned matches reconnect orb.
1443 */
1444 if (scsi_id->status_block.ORB_offset_lo != scsi_id->reconnect_orb_dma) {
1445 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out");
1446 return(-EIO);
1447 }
1448
1449 /*
1450 * Check status
1451 */
1452 if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) ||
1453 STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) ||
1454 STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) {
1455
1456 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect failed");
1457 return(-EIO);
1458 }
1459
1460 HPSB_DEBUG("Reconnected to SBP-2 device");
1461
1462 return(0);
1463
1464 }
1465
1466 /*
1467 * This function is called in order to set the busy timeout (number of
1468 * retries to attempt) on the sbp2 device.
1469 */
1470 static int sbp2_set_busy_timeout(struct scsi_id_instance_data *scsi_id)
1471 {
1472 quadlet_t data;
1473
1474 SBP2_DEBUG("sbp2_set_busy_timeout");
1475
1476 /*
1477 * Ok, let's write to the target's busy timeout register
1478 */
1479 data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE);
1480
1481 if (hpsb_node_write(scsi_id->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4)) {
1482 SBP2_ERR("sbp2_set_busy_timeout error");
1483 }
1484
1485 return(0);
1486 }
1487
1488
1489 /*
1490 * This function is called to parse sbp2 device's config rom unit
1491 * directory. Used to determine things like sbp2 management agent offset,
1492 * and command set used (SCSI or RBC).
1493 */
1494 static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id,
1495 struct unit_directory *ud)
1496 {
1497 struct csr1212_keyval *kv;
1498 struct csr1212_dentry *dentry;
1499 u64 management_agent_addr;
1500 u32 command_set_spec_id, command_set, unit_characteristics,
1501 firmware_revision, workarounds;
1502 int i;
1503
1504 SBP2_DEBUG("sbp2_parse_unit_directory");
1505
1506 management_agent_addr = 0x0;
1507 command_set_spec_id = 0x0;
1508 command_set = 0x0;
1509 unit_characteristics = 0x0;
1510 firmware_revision = 0x0;
1511
1512 /* Handle different fields in the unit directory, based on keys */
1513 csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) {
1514 switch (kv->key.id) {
1515 case CSR1212_KV_ID_DEPENDENT_INFO:
1516 if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET) {
1517 /* Save off the management agent address */
1518 management_agent_addr =
1519 CSR1212_REGISTER_SPACE_BASE +
1520 (kv->value.csr_offset << 2);
1521
1522 SBP2_DEBUG("sbp2_management_agent_addr = %x",
1523 (unsigned int) management_agent_addr);
1524 } else
1525 scsi_id->sbp2_device_type_and_lun = kv->value.immediate;
1526 break;
1527
1528 case SBP2_COMMAND_SET_SPEC_ID_KEY:
1529 /* Command spec organization */
1530 command_set_spec_id = kv->value.immediate;
1531 SBP2_DEBUG("sbp2_command_set_spec_id = %x",
1532 (unsigned int) command_set_spec_id);
1533 break;
1534
1535 case SBP2_COMMAND_SET_KEY:
1536 /* Command set used by sbp2 device */
1537 command_set = kv->value.immediate;
1538 SBP2_DEBUG("sbp2_command_set = %x",
1539 (unsigned int) command_set);
1540 break;
1541
1542 case SBP2_UNIT_CHARACTERISTICS_KEY:
1543 /*
1544 * Unit characterisitcs (orb related stuff
1545 * that I'm not yet paying attention to)
1546 */
1547 unit_characteristics = kv->value.immediate;
1548 SBP2_DEBUG("sbp2_unit_characteristics = %x",
1549 (unsigned int) unit_characteristics);
1550 break;
1551
1552 case SBP2_FIRMWARE_REVISION_KEY:
1553 /* Firmware revision */
1554 firmware_revision = kv->value.immediate;
1555 if (force_inquiry_hack)
1556 SBP2_INFO("sbp2_firmware_revision = %x",
1557 (unsigned int) firmware_revision);
1558 else SBP2_DEBUG("sbp2_firmware_revision = %x",
1559 (unsigned int) firmware_revision);
1560 break;
1561
1562 default:
1563 break;
1564 }
1565 }
1566
1567 /* This is the start of our broken device checking. We try to hack
1568 * around oddities and known defects. */
1569 workarounds = 0x0;
1570
1571 /* If the vendor id is 0xa0b8 (Symbios vendor id), then we have a
1572 * bridge with 128KB max transfer size limitation. For sanity, we
1573 * only voice this when the current max_sectors setting
1574 * exceeds the 128k limit. By default, that is not the case.
1575 *
1576 * It would be really nice if we could detect this before the scsi
1577 * host gets initialized. That way we can down-force the
1578 * max_sectors to account for it. That is not currently
1579 * possible. */
1580 if ((firmware_revision & 0xffff00) ==
1581 SBP2_128KB_BROKEN_FIRMWARE &&
1582 (max_sectors * 512) > (128*1024)) {
1583 SBP2_WARN("Node " NODE_BUS_FMT ": Bridge only supports 128KB max transfer size.",
1584 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid));
1585 SBP2_WARN("WARNING: Current max_sectors setting is larger than 128KB (%d sectors)!",
1586 max_sectors);
1587 workarounds |= SBP2_BREAKAGE_128K_MAX_TRANSFER;
1588 }
1589
1590 /* Check for a blacklisted set of devices that require us to force
1591 * a 36 byte host inquiry. This can be overriden as a module param
1592 * (to force all hosts). */
1593 for (i = 0; i < NUM_BROKEN_INQUIRY_DEVS; i++) {
1594 if ((firmware_revision & 0xffff00) ==
1595 sbp2_broken_inquiry_list[i]) {
1596 SBP2_WARN("Node " NODE_BUS_FMT ": Using 36byte inquiry workaround",
1597 NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid));
1598 workarounds |= SBP2_BREAKAGE_INQUIRY_HACK;
1599 break; /* No need to continue. */
1600 }
1601 }
1602
1603 /* If this is a logical unit directory entry, process the parent
1604 * to get the values. */
1605 if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) {
1606 struct unit_directory *parent_ud =
1607 container_of(ud->device.parent, struct unit_directory, device);
1608 sbp2_parse_unit_directory(scsi_id, parent_ud);
1609 } else {
1610 scsi_id->sbp2_management_agent_addr = management_agent_addr;
1611 scsi_id->sbp2_command_set_spec_id = command_set_spec_id;
1612 scsi_id->sbp2_command_set = command_set;
1613 scsi_id->sbp2_unit_characteristics = unit_characteristics;
1614 scsi_id->sbp2_firmware_revision = firmware_revision;
1615 scsi_id->workarounds = workarounds;
1616 }
1617 }
1618
1619 /*
1620 * This function is called in order to determine the max speed and packet
1621 * size we can use in our ORBs. Note, that we (the driver and host) only
1622 * initiate the transaction. The SBP-2 device actually transfers the data
1623 * (by reading from the DMA area we tell it). This means that the SBP-2
1624 * device decides the actual maximum data it can transfer. We just tell it
1625 * the speed that it needs to use, and the max_rec the host supports, and
1626 * it takes care of the rest.
1627 */
1628 static int sbp2_max_speed_and_size(struct scsi_id_instance_data *scsi_id)
1629 {
1630 struct sbp2scsi_host_info *hi = scsi_id->hi;
1631
1632 SBP2_DEBUG("sbp2_max_speed_and_size");
1633
1634 /* Initial setting comes from the hosts speed map */
1635 scsi_id->speed_code = hi->host->speed_map[NODEID_TO_NODE(hi->host->node_id) * 64
1636 + NODEID_TO_NODE(scsi_id->ne->nodeid)];
1637
1638 /* Bump down our speed if the user requested it */
1639 if (scsi_id->speed_code > max_speed) {
1640 scsi_id->speed_code = max_speed;
1641 SBP2_ERR("Forcing SBP-2 max speed down to %s",
1642 hpsb_speedto_str[scsi_id->speed_code]);
1643 }
1644
1645 /* Payload size is the lesser of what our speed supports and what
1646 * our host supports. */
1647 scsi_id->max_payload_size = min(sbp2_speedto_max_payload[scsi_id->speed_code],
1648 (u8)(hi->host->csr.max_rec - 1));
1649
1650 HPSB_DEBUG("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]",
1651 NODE_BUS_ARGS(hi->host, scsi_id->ne->nodeid),
1652 hpsb_speedto_str[scsi_id->speed_code],
1653 1 << ((u32)scsi_id->max_payload_size + 2));
1654
1655 return(0);
1656 }
1657
1658 /*
1659 * This function is called in order to perform a SBP-2 agent reset.
1660 */
1661 static int sbp2_agent_reset(struct scsi_id_instance_data *scsi_id, int wait)
1662 {
1663 quadlet_t data;
1664 u64 addr;
1665 int retval;
1666
1667 SBP2_DEBUG("sbp2_agent_reset");
1668
1669 /*
1670 * Ok, let's write to the target's management agent register
1671 */
1672 data = ntohl(SBP2_AGENT_RESET_DATA);
1673 addr = scsi_id->sbp2_command_block_agent_addr + SBP2_AGENT_RESET_OFFSET;
1674
1675 if (wait)
1676 retval = hpsb_node_write(scsi_id->ne, addr, &data, 4);
1677 else
1678 retval = sbp2util_node_write_no_wait(scsi_id->ne, addr, &data, 4);
1679
1680 if (retval < 0) {
1681 SBP2_ERR("hpsb_node_write failed.\n");
1682 return -EIO;
1683 }
1684
1685 /*
1686 * Need to make sure orb pointer is written on next command
1687 */
1688 scsi_id->last_orb = NULL;
1689
1690 return(0);
1691 }
1692
1693 /*
1694 * This function is called to create the actual command orb and s/g list
1695 * out of the scsi command itself.
1696 */
1697 static int sbp2_create_command_orb(struct scsi_id_instance_data *scsi_id,
1698 struct sbp2_command_info *command,
1699 unchar *scsi_cmd,
1700 unsigned int scsi_use_sg,
1701 unsigned int scsi_request_bufflen,
1702 void *scsi_request_buffer,
1703 unsigned char scsi_dir)
1704 {
1705 struct sbp2scsi_host_info *hi = scsi_id->hi;
1706 struct scatterlist *sgpnt = (struct scatterlist *) scsi_request_buffer;
1707 struct sbp2_command_orb *command_orb = &command->command_orb;
1708 struct sbp2_unrestricted_page_table *scatter_gather_element =
1709 &command->scatter_gather_element[0];
1710 int dma_dir = scsi_to_pci_dma_dir (scsi_dir);
1711 u32 sg_count, sg_len, orb_direction;
1712 dma_addr_t sg_addr;
1713 int i;
1714
1715 /*
1716 * Set-up our command ORB..
1717 *
1718 * NOTE: We're doing unrestricted page tables (s/g), as this is
1719 * best performance (at least with the devices I have). This means
1720 * that data_size becomes the number of s/g elements, and
1721 * page_size should be zero (for unrestricted).
1722 */
1723 command_orb->next_ORB_hi = ORB_SET_NULL_PTR(1);
1724 command_orb->next_ORB_lo = 0x0;
1725 command_orb->misc = ORB_SET_MAX_PAYLOAD(scsi_id->max_payload_size);
1726 command_orb->misc |= ORB_SET_SPEED(scsi_id->speed_code);
1727 command_orb->misc |= ORB_SET_NOTIFY(1); /* Notify us when complete */
1728
1729 /*
1730 * Get the direction of the transfer. If the direction is unknown, then use our
1731 * goofy table as a back-up.
1732 */
1733 switch (scsi_dir) {
1734 case SCSI_DATA_NONE:
1735 orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER;
1736 break;
1737 case SCSI_DATA_WRITE:
1738 orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA;
1739 break;
1740 case SCSI_DATA_READ:
1741 orb_direction = ORB_DIRECTION_READ_FROM_MEDIA;
1742 break;
1743 case SCSI_DATA_UNKNOWN:
1744 default:
1745 SBP2_ERR("SCSI data transfer direction not specified. "
1746 "Update the SBP2 direction table in sbp2.h if "
1747 "necessary for your application");
1748 print_command (scsi_cmd);
1749 orb_direction = sbp2scsi_direction_table[*scsi_cmd];
1750 break;
1751 }
1752
1753 /*
1754 * Set-up our pagetable stuff... unfortunately, this has become
1755 * messier than I'd like. Need to clean this up a bit. ;-)
1756 */
1757 if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) {
1758
1759 SBP2_DEBUG("No data transfer");
1760
1761 /*
1762 * Handle no data transfer
1763 */
1764 command_orb->data_descriptor_hi = 0x0;
1765 command_orb->data_descriptor_lo = 0x0;
1766 command_orb->misc |= ORB_SET_DIRECTION(1);
1767
1768 } else if (scsi_use_sg) {
1769
1770 SBP2_DEBUG("Use scatter/gather");
1771
1772 /*
1773 * Special case if only one element (and less than 64KB in size)
1774 */
1775 if ((scsi_use_sg == 1) && (sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) {
1776
1777 SBP2_DEBUG("Only one s/g element");
1778 command->dma_dir = dma_dir;
1779 command->dma_size = sgpnt[0].length;
1780 command->dma_type = CMD_DMA_PAGE;
1781 command->cmd_dma = pci_map_page(hi->host->pdev,
1782 sgpnt[0].page,
1783 sgpnt[0].offset,
1784 command->dma_size,
1785 command->dma_dir);
1786 SBP2_DMA_ALLOC("single page scatter element");
1787
1788 command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1789 command_orb->data_descriptor_lo = command->cmd_dma;
1790 command_orb->misc |= ORB_SET_DATA_SIZE(command->dma_size);
1791 command_orb->misc |= ORB_SET_DIRECTION(orb_direction);
1792
1793 } else {
1794 int count = pci_map_sg(hi->host->pdev, sgpnt, scsi_use_sg, dma_dir);
1795 SBP2_DMA_ALLOC("scatter list");
1796
1797 command->dma_size = scsi_use_sg;
1798 command->dma_dir = dma_dir;
1799 command->sge_buffer = sgpnt;
1800
1801 /* use page tables (s/g) */
1802 command_orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1803 command_orb->misc |= ORB_SET_DIRECTION(orb_direction);
1804 command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1805 command_orb->data_descriptor_lo = command->sge_dma;
1806
1807 /*
1808 * Loop through and fill out our sbp-2 page tables
1809 * (and split up anything too large)
1810 */
1811 for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) {
1812 sg_len = sg_dma_len(sgpnt);
1813 sg_addr = sg_dma_address(sgpnt);
1814 while (sg_len) {
1815 scatter_gather_element[sg_count].segment_base_lo = sg_addr;
1816 if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
1817 scatter_gather_element[sg_count].length_segment_base_hi =
1818 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
1819 sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
1820 sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
1821 } else {
1822 scatter_gather_element[sg_count].length_segment_base_hi =
1823 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
1824 sg_len = 0;
1825 }
1826 sg_count++;
1827 }
1828 }
1829
1830 /* Number of page table (s/g) elements */
1831 command_orb->misc |= ORB_SET_DATA_SIZE(sg_count);
1832
1833 sbp2util_packet_dump(scatter_gather_element,
1834 (sizeof(struct sbp2_unrestricted_page_table)) * sg_count,
1835 "sbp2 s/g list", command->sge_dma);
1836
1837 /*
1838 * Byte swap page tables if necessary
1839 */
1840 sbp2util_cpu_to_be32_buffer(scatter_gather_element,
1841 (sizeof(struct sbp2_unrestricted_page_table)) *
1842 sg_count);
1843
1844 }
1845
1846 } else {
1847
1848 SBP2_DEBUG("No scatter/gather");
1849
1850 command->dma_dir = dma_dir;
1851 command->dma_size = scsi_request_bufflen;
1852 command->dma_type = CMD_DMA_SINGLE;
1853 command->cmd_dma = pci_map_single (hi->host->pdev, scsi_request_buffer,
1854 command->dma_size,
1855 command->dma_dir);
1856 SBP2_DMA_ALLOC("single bulk");
1857
1858 /*
1859 * Handle case where we get a command w/o s/g enabled (but
1860 * check for transfers larger than 64K)
1861 */
1862 if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) {
1863
1864 command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1865 command_orb->data_descriptor_lo = command->cmd_dma;
1866 command_orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen);
1867 command_orb->misc |= ORB_SET_DIRECTION(orb_direction);
1868
1869 /*
1870 * Sanity, in case our direction table is not
1871 * up-to-date
1872 */
1873 if (!scsi_request_bufflen) {
1874 command_orb->data_descriptor_hi = 0x0;
1875 command_orb->data_descriptor_lo = 0x0;
1876 command_orb->misc |= ORB_SET_DIRECTION(1);
1877 }
1878
1879 } else {
1880 /*
1881 * Need to turn this into page tables, since the
1882 * buffer is too large.
1883 */
1884 command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
1885 command_orb->data_descriptor_lo = command->sge_dma;
1886
1887 /* Use page tables (s/g) */
1888 command_orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1889 command_orb->misc |= ORB_SET_DIRECTION(orb_direction);
1890
1891 /*
1892 * fill out our sbp-2 page tables (and split up
1893 * the large buffer)
1894 */
1895 sg_count = 0;
1896 sg_len = scsi_request_bufflen;
1897 sg_addr = command->cmd_dma;
1898 while (sg_len) {
1899 scatter_gather_element[sg_count].segment_base_lo = sg_addr;
1900 if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) {
1901 scatter_gather_element[sg_count].length_segment_base_hi =
1902 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH);
1903 sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH;
1904 sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH;
1905 } else {
1906 scatter_gather_element[sg_count].length_segment_base_hi =
1907 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len);
1908 sg_len = 0;
1909 }
1910 sg_count++;
1911 }
1912
1913 /* Number of page table (s/g) elements */
1914 command_orb->misc |= ORB_SET_DATA_SIZE(sg_count);
1915
1916 sbp2util_packet_dump(scatter_gather_element,
1917 (sizeof(struct sbp2_unrestricted_page_table)) * sg_count,
1918 "sbp2 s/g list", command->sge_dma);
1919
1920 /*
1921 * Byte swap page tables if necessary
1922 */
1923 sbp2util_cpu_to_be32_buffer(scatter_gather_element,
1924 (sizeof(struct sbp2_unrestricted_page_table)) *
1925 sg_count);
1926
1927 }
1928
1929 }
1930
1931 /*
1932 * Byte swap command ORB if necessary
1933 */
1934 sbp2util_cpu_to_be32_buffer(command_orb, sizeof(struct sbp2_command_orb));
1935
1936 /*
1937 * Put our scsi command in the command ORB
1938 */
1939 memset(command_orb->cdb, 0, 12);
1940 memcpy(command_orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd));
1941
1942 return(0);
1943 }
1944
1945 /*
1946 * This function is called in order to begin a regular SBP-2 command.
1947 */
1948 static int sbp2_link_orb_command(struct scsi_id_instance_data *scsi_id,
1949 struct sbp2_command_info *command)
1950 {
1951 struct sbp2scsi_host_info *hi = scsi_id->hi;
1952 struct sbp2_command_orb *command_orb = &command->command_orb;
1953 struct node_entry *ne = scsi_id->ne;
1954 u64 addr;
1955
1956 outstanding_orb_incr;
1957 SBP2_ORB_DEBUG("sending command orb %p, total orbs = %x",
1958 command_orb, global_outstanding_command_orbs);
1959
1960 pci_dma_sync_single_for_device(hi->host->pdev, command->command_orb_dma,
1961 sizeof(struct sbp2_command_orb),
1962 PCI_DMA_BIDIRECTIONAL);
1963 pci_dma_sync_single_for_device(hi->host->pdev, command->sge_dma,
1964 sizeof(command->scatter_gather_element),
1965 PCI_DMA_BIDIRECTIONAL);
1966 /*
1967 * Check to see if there are any previous orbs to use
1968 */
1969 if (scsi_id->last_orb == NULL) {
1970 quadlet_t data[2];
1971
1972 /*
1973 * Ok, let's write to the target's management agent register
1974 */
1975 addr = scsi_id->sbp2_command_block_agent_addr + SBP2_ORB_POINTER_OFFSET;
1976 data[0] = ORB_SET_NODE_ID(hi->host->node_id);
1977 data[1] = command->command_orb_dma;
1978 sbp2util_cpu_to_be32_buffer(data, 8);
1979
1980 SBP2_ORB_DEBUG("write command agent, command orb %p", command_orb);
1981
1982 if (sbp2util_node_write_no_wait(ne, addr, data, 8) < 0) {
1983 SBP2_ERR("sbp2util_node_write_no_wait failed.\n");
1984 return -EIO;
1985 }
1986
1987 SBP2_ORB_DEBUG("write command agent complete");
1988
1989 scsi_id->last_orb = command_orb;
1990 scsi_id->last_orb_dma = command->command_orb_dma;
1991
1992 } else {
1993 quadlet_t data;
1994
1995 /*
1996 * We have an orb already sent (maybe or maybe not
1997 * processed) that we can append this orb to. So do so,
1998 * and ring the doorbell. Have to be very careful
1999 * modifying these next orb pointers, as they are accessed
2000 * both by the sbp2 device and us.
2001 */
2002 scsi_id->last_orb->next_ORB_lo =
2003 cpu_to_be32(command->command_orb_dma);
2004 /* Tells hardware that this pointer is valid */
2005 scsi_id->last_orb->next_ORB_hi = 0x0;
2006 pci_dma_sync_single_for_device(hi->host->pdev, scsi_id->last_orb_dma,
2007 sizeof(struct sbp2_command_orb),
2008 PCI_DMA_BIDIRECTIONAL);
2009
2010 /*
2011 * Ring the doorbell
2012 */
2013 data = cpu_to_be32(command->command_orb_dma);
2014 addr = scsi_id->sbp2_command_block_agent_addr + SBP2_DOORBELL_OFFSET;
2015
2016 SBP2_ORB_DEBUG("ring doorbell, command orb %p", command_orb);
2017
2018 if (sbp2util_node_write_no_wait(ne, addr, &data, 4) < 0) {
2019 SBP2_ERR("sbp2util_node_write_no_wait failed");
2020 return(-EIO);
2021 }
2022
2023 scsi_id->last_orb = command_orb;
2024 scsi_id->last_orb_dma = command->command_orb_dma;
2025
2026 }
2027 return(0);
2028 }
2029
2030 /*
2031 * This function is called in order to begin a regular SBP-2 command.
2032 */
2033 static int sbp2_send_command(struct scsi_id_instance_data *scsi_id,
2034 Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *))
2035 {
2036 unchar *cmd = (unchar *) SCpnt->cmnd;
2037 unsigned int request_bufflen = SCpnt->request_bufflen;
2038 struct sbp2_command_info *command;
2039
2040 SBP2_DEBUG("sbp2_send_command");
2041 #if (CONFIG_IEEE1394_SBP2_DEBUG >= 2) || defined(CONFIG_IEEE1394_SBP2_PACKET_DUMP)
2042 printk("[scsi command]\n ");
2043 print_command (cmd);
2044 #endif
2045 SBP2_DEBUG("SCSI transfer size = %x", request_bufflen);
2046 SBP2_DEBUG("SCSI s/g elements = %x", (unsigned int)SCpnt->use_sg);
2047
2048 /*
2049 * Allocate a command orb and s/g structure
2050 */
2051 command = sbp2util_allocate_command_orb(scsi_id, SCpnt, done);
2052 if (!command) {
2053 return(-EIO);
2054 }
2055
2056 /*
2057 * The scsi stack sends down a request_bufflen which does not match the
2058 * length field in the scsi cdb. This causes some sbp2 devices to
2059 * reject this inquiry command. Fix the request_bufflen.
2060 */
2061 if (*cmd == INQUIRY) {
2062 if (force_inquiry_hack || scsi_id->workarounds & SBP2_BREAKAGE_INQUIRY_HACK)
2063 request_bufflen = cmd[4] = 0x24;
2064 else
2065 request_bufflen = cmd[4];
2066 }
2067
2068 /*
2069 * Now actually fill in the comamnd orb and sbp2 s/g list
2070 */
2071 sbp2_create_command_orb(scsi_id, command, cmd, SCpnt->use_sg,
2072 request_bufflen, SCpnt->request_buffer,
2073 SCpnt->sc_data_direction);
2074 /*
2075 * Update our cdb if necessary (to handle sbp2 RBC command set
2076 * differences). This is where the command set hacks go! =)
2077 */
2078 sbp2_check_sbp2_command(scsi_id, command->command_orb.cdb);
2079
2080 sbp2util_packet_dump(&command->command_orb, sizeof(struct sbp2_command_orb),
2081 "sbp2 command orb", command->command_orb_dma);
2082
2083 /*
2084 * Initialize status fifo
2085 */
2086 memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
2087
2088 /*
2089 * Link up the orb, and ring the doorbell if needed
2090 */
2091 sbp2_link_orb_command(scsi_id, command);
2092
2093 return(0);
2094 }
2095
2096
2097 /*
2098 * This function deals with command set differences between Linux scsi
2099 * command set and sbp2 RBC command set.
2100 */
2101 static void sbp2_check_sbp2_command(struct scsi_id_instance_data *scsi_id, unchar *cmd)
2102 {
2103 unchar new_cmd[16];
2104 u8 device_type = SBP2_DEVICE_TYPE (scsi_id->sbp2_device_type_and_lun);
2105
2106 SBP2_DEBUG("sbp2_check_sbp2_command");
2107
2108 switch (*cmd) {
2109
2110 case READ_6:
2111
2112 if (sbp2_command_conversion_device_type(device_type)) {
2113
2114 SBP2_DEBUG("Convert READ_6 to READ_10");
2115
2116 /*
2117 * Need to turn read_6 into read_10
2118 */
2119 new_cmd[0] = 0x28;
2120 new_cmd[1] = (cmd[1] & 0xe0);
2121 new_cmd[2] = 0x0;
2122 new_cmd[3] = (cmd[1] & 0x1f);
2123 new_cmd[4] = cmd[2];
2124 new_cmd[5] = cmd[3];
2125 new_cmd[6] = 0x0;
2126 new_cmd[7] = 0x0;
2127 new_cmd[8] = cmd[4];
2128 new_cmd[9] = cmd[5];
2129
2130 memcpy(cmd, new_cmd, 10);
2131
2132 }
2133
2134 break;
2135
2136 case WRITE_6:
2137
2138 if (sbp2_command_conversion_device_type(device_type)) {
2139
2140 SBP2_DEBUG("Convert WRITE_6 to WRITE_10");
2141
2142 /*
2143 * Need to turn write_6 into write_10
2144 */
2145 new_cmd[0] = 0x2a;
2146 new_cmd[1] = (cmd[1] & 0xe0);
2147 new_cmd[2] = 0x0;
2148 new_cmd[3] = (cmd[1] & 0x1f);
2149 new_cmd[4] = cmd[2];
2150 new_cmd[5] = cmd[3];
2151 new_cmd[6] = 0x0;
2152 new_cmd[7] = 0x0;
2153 new_cmd[8] = cmd[4];
2154 new_cmd[9] = cmd[5];
2155
2156 memcpy(cmd, new_cmd, 10);
2157
2158 }
2159
2160 break;
2161
2162 case MODE_SENSE:
2163
2164 if (sbp2_command_conversion_device_type(device_type)) {
2165
2166 SBP2_DEBUG("Convert MODE_SENSE_6 to MODE_SENSE_10");
2167
2168 /*
2169 * Need to turn mode_sense_6 into mode_sense_10
2170 */
2171 new_cmd[0] = 0x5a;
2172 new_cmd[1] = cmd[1];
2173 new_cmd[2] = cmd[2];
2174 new_cmd[3] = 0x0;
2175 new_cmd[4] = 0x0;
2176 new_cmd[5] = 0x0;
2177 new_cmd[6] = 0x0;
2178 new_cmd[7] = 0x0;
2179 new_cmd[8] = cmd[4];
2180 new_cmd[9] = cmd[5];
2181
2182 memcpy(cmd, new_cmd, 10);
2183
2184 }
2185
2186 break;
2187
2188 case MODE_SELECT:
2189
2190 /*
2191 * TODO. Probably need to change mode select to 10 byte version
2192 */
2193
2194 default:
2195 break;
2196 }
2197
2198 return;
2199 }
2200
2201 /*
2202 * Translates SBP-2 status into SCSI sense data for check conditions
2203 */
2204 static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, unchar *sense_data)
2205 {
2206 SBP2_DEBUG("sbp2_status_to_sense_data");
2207
2208 /*
2209 * Ok, it's pretty ugly... ;-)
2210 */
2211 sense_data[0] = 0x70;
2212 sense_data[1] = 0x0;
2213 sense_data[2] = sbp2_status[9];
2214 sense_data[3] = sbp2_status[12];
2215 sense_data[4] = sbp2_status[13];
2216 sense_data[5] = sbp2_status[14];
2217 sense_data[6] = sbp2_status[15];
2218 sense_data[7] = 10;
2219 sense_data[8] = sbp2_status[16];
2220 sense_data[9] = sbp2_status[17];
2221 sense_data[10] = sbp2_status[18];
2222 sense_data[11] = sbp2_status[19];
2223 sense_data[12] = sbp2_status[10];
2224 sense_data[13] = sbp2_status[11];
2225 sense_data[14] = sbp2_status[20];
2226 sense_data[15] = sbp2_status[21];
2227
2228 return(sbp2_status[8] & 0x3f); /* return scsi status */
2229 }
2230
2231 /*
2232 * This function is called after a command is completed, in order to do any necessary SBP-2
2233 * response data translations for the SCSI stack
2234 */
2235 static void sbp2_check_sbp2_response(struct scsi_id_instance_data *scsi_id,
2236 Scsi_Cmnd *SCpnt)
2237 {
2238 u8 *scsi_buf = SCpnt->request_buffer;
2239 u8 device_type = SBP2_DEVICE_TYPE (scsi_id->sbp2_device_type_and_lun);
2240
2241 SBP2_DEBUG("sbp2_check_sbp2_response");
2242
2243 switch (SCpnt->cmnd[0]) {
2244
2245 case INQUIRY:
2246
2247 /*
2248 * If scsi_id->sbp2_device_type_and_lun is uninitialized, then fill
2249 * this information in from the inquiry response data. Lun is set to zero.
2250 */
2251 if (scsi_id->sbp2_device_type_and_lun == SBP2_DEVICE_TYPE_LUN_UNINITIALIZED) {
2252 SBP2_DEBUG("Creating sbp2_device_type_and_lun from scsi inquiry data");
2253 scsi_id->sbp2_device_type_and_lun = (scsi_buf[0] & 0x1f) << 16;
2254 }
2255
2256 /*
2257 * Make sure data length is ok. Minimum length is 36 bytes
2258 */
2259 if (scsi_buf[4] == 0) {
2260 scsi_buf[4] = 36 - 5;
2261 }
2262
2263 /*
2264 * Check for Simple Direct Access Device and change it to TYPE_DISK
2265 */
2266 if ((scsi_buf[0] & 0x1f) == TYPE_SDAD) {
2267 SBP2_DEBUG("Changing TYPE_SDAD to TYPE_DISK");
2268 scsi_buf[0] &= 0xe0;
2269 }
2270
2271 /*
2272 * Fix ansi revision and response data format
2273 */
2274 scsi_buf[2] |= 2;
2275 scsi_buf[3] = (scsi_buf[3] & 0xf0) | 2;
2276
2277 break;
2278
2279 case MODE_SENSE:
2280
2281 if (sbp2_command_conversion_device_type(device_type)) {
2282
2283 SBP2_DEBUG("Modify mode sense response (10 byte version)");
2284
2285 scsi_buf[0] = scsi_buf[1]; /* Mode data length */
2286 scsi_buf[1] = scsi_buf[2]; /* Medium type */
2287 scsi_buf[2] = scsi_buf[3]; /* Device specific parameter */
2288 scsi_buf[3] = scsi_buf[7]; /* Block descriptor length */
2289 memcpy(scsi_buf + 4, scsi_buf + 8, scsi_buf[0]);
2290 }
2291
2292 break;
2293
2294 case MODE_SELECT:
2295
2296 /*
2297 * TODO. Probably need to change mode select to 10 byte version
2298 */
2299
2300 default:
2301 break;
2302 }
2303 return;
2304 }
2305
2306 /*
2307 * This function deals with status writes from the SBP-2 device
2308 */
2309 static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, int destid,
2310 quadlet_t *data, u64 addr, size_t length, u16 fl)
2311 {
2312 struct sbp2scsi_host_info *hi;
2313 struct scsi_id_instance_data *scsi_id = NULL, *scsi_id_tmp;
2314 u32 id;
2315 Scsi_Cmnd *SCpnt = NULL;
2316 u32 scsi_status = SBP2_SCSI_STATUS_GOOD;
2317 struct sbp2_command_info *command;
2318
2319 SBP2_DEBUG("sbp2_handle_status_write");
2320
2321 sbp2util_packet_dump(data, length, "sbp2 status write by device", (u32)addr);
2322
2323 if (!host) {
2324 SBP2_ERR("host is NULL - this is bad!");
2325 return(RCODE_ADDRESS_ERROR);
2326 }
2327
2328 hi = hpsb_get_hostinfo(&sbp2_highlevel, host);
2329
2330 if (!hi) {
2331 SBP2_ERR("host info is NULL - this is bad!");
2332 return(RCODE_ADDRESS_ERROR);
2333 }
2334
2335 /*
2336 * Find our scsi_id structure by looking at the status fifo address written to by
2337 * the sbp2 device.
2338 */
2339 id = SBP2_STATUS_FIFO_OFFSET_TO_ENTRY((u32)(addr - SBP2_STATUS_FIFO_ADDRESS));
2340 list_for_each_entry(scsi_id_tmp, &hi->scsi_ids, scsi_list) {
2341 if (scsi_id_tmp->ne->nodeid == nodeid && scsi_id_tmp->ud->id == id) {
2342 scsi_id = scsi_id_tmp;
2343 break;
2344 }
2345 }
2346
2347 if (!scsi_id) {
2348 SBP2_ERR("scsi_id is NULL - device is gone?");
2349 return(RCODE_ADDRESS_ERROR);
2350 }
2351
2352 /*
2353 * Put response into scsi_id status fifo...
2354 */
2355 memcpy(&scsi_id->status_block, data, length);
2356
2357 /*
2358 * Byte swap first two quadlets (8 bytes) of status for processing
2359 */
2360 sbp2util_be32_to_cpu_buffer(&scsi_id->status_block, 8);
2361
2362 /*
2363 * Handle command ORB status here if necessary. First, need to match status with command.
2364 */
2365 command = sbp2util_find_command_for_orb(scsi_id, scsi_id->status_block.ORB_offset_lo);
2366 if (command) {
2367
2368 SBP2_DEBUG("Found status for command ORB");
2369 pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma,
2370 sizeof(struct sbp2_command_orb),
2371 PCI_DMA_BIDIRECTIONAL);
2372 pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma,
2373 sizeof(command->scatter_gather_element),
2374 PCI_DMA_BIDIRECTIONAL);
2375
2376 SBP2_ORB_DEBUG("matched command orb %p", &command->command_orb);
2377 outstanding_orb_decr;
2378
2379 /*
2380 * Matched status with command, now grab scsi command pointers and check status
2381 */
2382 SCpnt = command->Current_SCpnt;
2383 sbp2util_mark_command_completed(scsi_id, command);
2384
2385 if (SCpnt) {
2386
2387 /*
2388 * See if the target stored any scsi status information
2389 */
2390 if (STATUS_GET_LENGTH(scsi_id->status_block.ORB_offset_hi_misc) > 1) {
2391 /*
2392 * Translate SBP-2 status to SCSI sense data
2393 */
2394 SBP2_DEBUG("CHECK CONDITION");
2395 scsi_status = sbp2_status_to_sense_data((unchar *)&scsi_id->status_block, SCpnt->sense_buffer);
2396 }
2397
2398 /*
2399 * Check to see if the dead bit is set. If so, we'll have to initiate
2400 * a fetch agent reset.
2401 */
2402 if (STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc)) {
2403
2404 /*
2405 * Initiate a fetch agent reset.
2406 */
2407 SBP2_DEBUG("Dead bit set - initiating fetch agent reset");
2408 sbp2_agent_reset(scsi_id, 0);
2409 }
2410
2411 SBP2_ORB_DEBUG("completing command orb %p", &command->command_orb);
2412 }
2413
2414 /*
2415 * Check here to see if there are no commands in-use. If there are none, we can
2416 * null out last orb so that next time around we write directly to the orb pointer...
2417 * Quick start saves one 1394 bus transaction.
2418 */
2419 if (list_empty(&scsi_id->sbp2_command_orb_inuse)) {
2420 scsi_id->last_orb = NULL;
2421 }
2422
2423 } else {
2424
2425 /*
2426 * It's probably a login/logout/reconnect status.
2427 */
2428 if ((scsi_id->login_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
2429 (scsi_id->query_logins_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
2430 (scsi_id->reconnect_orb_dma == scsi_id->status_block.ORB_offset_lo) ||
2431 (scsi_id->logout_orb_dma == scsi_id->status_block.ORB_offset_lo)) {
2432 atomic_set(&scsi_id->sbp2_login_complete, 1);
2433 }
2434 }
2435
2436 if (SCpnt) {
2437
2438 /* Complete the SCSI command. */
2439 SBP2_DEBUG("Completing SCSI command");
2440 sbp2scsi_complete_command(scsi_id, scsi_status, SCpnt,
2441 command->Current_done);
2442 SBP2_ORB_DEBUG("command orb completed");
2443 }
2444
2445 return(RCODE_COMPLETE);
2446 }
2447
2448
2449 /**************************************
2450 * SCSI interface related section
2451 **************************************/
2452
2453 /*
2454 * This routine is the main request entry routine for doing I/O. It is
2455 * called from the scsi stack directly.
2456 */
2457 static int sbp2scsi_queuecommand (Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *))
2458 {
2459 struct scsi_id_instance_data *scsi_id =
2460 (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
2461 struct sbp2scsi_host_info *hi;
2462
2463 SBP2_DEBUG("sbp2scsi_queuecommand");
2464
2465 /*
2466 * If scsi_id is null, it means there is no device in this slot,
2467 * so we should return selection timeout.
2468 */
2469 if (!scsi_id) {
2470 SCpnt->result = DID_NO_CONNECT << 16;
2471 done (SCpnt);
2472 return 0;
2473 }
2474
2475 hi = scsi_id->hi;
2476
2477 if (!hi) {
2478 SBP2_ERR("sbp2scsi_host_info is NULL - this is bad!");
2479 SCpnt->result = DID_NO_CONNECT << 16;
2480 done (SCpnt);
2481 return(0);
2482 }
2483
2484 /*
2485 * Until we handle multiple luns, just return selection time-out
2486 * to any IO directed at non-zero LUNs
2487 */
2488 if (SCpnt->device->lun) {
2489 SCpnt->result = DID_NO_CONNECT << 16;
2490 done (SCpnt);
2491 return(0);
2492 }
2493
2494 /*
2495 * Check for request sense command, and handle it here
2496 * (autorequest sense)
2497 */
2498 if (SCpnt->cmnd[0] == REQUEST_SENSE) {
2499 SBP2_DEBUG("REQUEST_SENSE");
2500 memcpy(SCpnt->request_buffer, SCpnt->sense_buffer, SCpnt->request_bufflen);
2501 memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer));
2502 sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_GOOD, SCpnt, done);
2503 return(0);
2504 }
2505
2506 /*
2507 * Check to see if we are in the middle of a bus reset.
2508 */
2509 if (!hpsb_node_entry_valid(scsi_id->ne)) {
2510 SBP2_ERR("Bus reset in progress - rejecting command");
2511 SCpnt->result = DID_BUS_BUSY << 16;
2512 done (SCpnt);
2513 return(0);
2514 }
2515
2516 /*
2517 * Try and send our SCSI command
2518 */
2519 if (sbp2_send_command(scsi_id, SCpnt, done)) {
2520 SBP2_ERR("Error sending SCSI command");
2521 sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_SELECTION_TIMEOUT,
2522 SCpnt, done);
2523 }
2524
2525 return(0);
2526 }
2527
2528 /*
2529 * This function is called in order to complete all outstanding SBP-2
2530 * commands (in case of resets, etc.).
2531 */
2532 static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id,
2533 u32 status)
2534 {
2535 struct sbp2scsi_host_info *hi = scsi_id->hi;
2536 struct list_head *lh;
2537 struct sbp2_command_info *command;
2538
2539 SBP2_DEBUG("sbp2scsi_complete_all_commands");
2540
2541 while (!list_empty(&scsi_id->sbp2_command_orb_inuse)) {
2542 SBP2_DEBUG("Found pending command to complete");
2543 lh = scsi_id->sbp2_command_orb_inuse.next;
2544 command = list_entry(lh, struct sbp2_command_info, list);
2545 pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma,
2546 sizeof(struct sbp2_command_orb),
2547 PCI_DMA_BIDIRECTIONAL);
2548 pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma,
2549 sizeof(command->scatter_gather_element),
2550 PCI_DMA_BIDIRECTIONAL);
2551 sbp2util_mark_command_completed(scsi_id, command);
2552 if (command->Current_SCpnt) {
2553 void (*done)(Scsi_Cmnd *) = command->Current_done;
2554 command->Current_SCpnt->result = status << 16;
2555 done (command->Current_SCpnt);
2556 }
2557 }
2558
2559 return;
2560 }
2561
2562 /*
2563 * This function is called in order to complete a regular SBP-2 command.
2564 *
2565 * This can be called in interrupt context.
2566 */
2567 static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id,
2568 u32 scsi_status, Scsi_Cmnd *SCpnt,
2569 void (*done)(Scsi_Cmnd *))
2570 {
2571 unsigned long flags;
2572
2573 SBP2_DEBUG("sbp2scsi_complete_command");
2574
2575 /*
2576 * Sanity
2577 */
2578 if (!SCpnt) {
2579 SBP2_ERR("SCpnt is NULL");
2580 return;
2581 }
2582
2583 /*
2584 * If a bus reset is in progress and there was an error, don't
2585 * complete the command, just let it get retried at the end of the
2586 * bus reset.
2587 */
2588 if (!hpsb_node_entry_valid(scsi_id->ne) && (scsi_status != SBP2_SCSI_STATUS_GOOD)) {
2589 SBP2_ERR("Bus reset in progress - retry command later");
2590 return;
2591 }
2592
2593 /*
2594 * Switch on scsi status
2595 */
2596 switch (scsi_status) {
2597 case SBP2_SCSI_STATUS_GOOD:
2598 SCpnt->result = DID_OK;
2599 break;
2600
2601 case SBP2_SCSI_STATUS_BUSY:
2602 SBP2_ERR("SBP2_SCSI_STATUS_BUSY");
2603 SCpnt->result = DID_BUS_BUSY << 16;
2604 break;
2605
2606 case SBP2_SCSI_STATUS_CHECK_CONDITION:
2607 SBP2_DEBUG("SBP2_SCSI_STATUS_CHECK_CONDITION");
2608 SCpnt->result = CHECK_CONDITION << 1;
2609
2610 /*
2611 * Debug stuff
2612 */
2613 #if CONFIG_IEEE1394_SBP2_DEBUG >= 1
2614 print_command (SCpnt->cmnd);
2615 print_sense("bh", SCpnt);
2616 #endif
2617
2618 break;
2619
2620 case SBP2_SCSI_STATUS_SELECTION_TIMEOUT:
2621 SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT");
2622 SCpnt->result = DID_NO_CONNECT << 16;
2623 print_command (SCpnt->cmnd);
2624 break;
2625
2626 case SBP2_SCSI_STATUS_CONDITION_MET:
2627 case SBP2_SCSI_STATUS_RESERVATION_CONFLICT:
2628 case SBP2_SCSI_STATUS_COMMAND_TERMINATED:
2629 SBP2_ERR("Bad SCSI status = %x", scsi_status);
2630 SCpnt->result = DID_ERROR << 16;
2631 print_command (SCpnt->cmnd);
2632 break;
2633
2634 default:
2635 SBP2_ERR("Unsupported SCSI status = %x", scsi_status);
2636 SCpnt->result = DID_ERROR << 16;
2637 }
2638
2639 /*
2640 * Take care of any sbp2 response data mucking here (RBC stuff, etc.)
2641 */
2642 if (SCpnt->result == DID_OK) {
2643 sbp2_check_sbp2_response(scsi_id, SCpnt);
2644 }
2645
2646 /*
2647 * If a bus reset is in progress and there was an error, complete
2648 * the command as busy so that it will get retried.
2649 */
2650 if (!hpsb_node_entry_valid(scsi_id->ne) && (scsi_status != SBP2_SCSI_STATUS_GOOD)) {
2651 SBP2_ERR("Completing command with busy (bus reset)");
2652 SCpnt->result = DID_BUS_BUSY << 16;
2653 }
2654
2655 /*
2656 * If a unit attention occurs, return busy status so it gets
2657 * retried... it could have happened because of a 1394 bus reset
2658 * or hot-plug...
2659 */
2660 #if 0
2661 if ((scsi_status == SBP2_SCSI_STATUS_CHECK_CONDITION) &&
2662 (SCpnt->sense_buffer[2] == UNIT_ATTENTION)) {
2663 SBP2_DEBUG("UNIT ATTENTION - return busy");
2664 SCpnt->result = DID_BUS_BUSY << 16;
2665 }
2666 #endif
2667
2668 /*
2669 * Tell scsi stack that we're done with this command
2670 */
2671 spin_lock_irqsave(scsi_id->scsi_host->host_lock,flags);
2672 done (SCpnt);
2673 spin_unlock_irqrestore(scsi_id->scsi_host->host_lock,flags);
2674
2675 return;
2676 }
2677
2678
2679 static int sbp2scsi_slave_configure (struct scsi_device *sdev)
2680 {
2681 blk_queue_dma_alignment(sdev->request_queue, (512 - 1));
2682
2683 return 0;
2684 }
2685
2686
2687 /*
2688 * Called by scsi stack when something has really gone wrong. Usually
2689 * called when a command has timed-out for some reason.
2690 */
2691 static int sbp2scsi_abort (Scsi_Cmnd *SCpnt)
2692 {
2693 struct scsi_id_instance_data *scsi_id =
2694 (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
2695 struct sbp2scsi_host_info *hi = scsi_id->hi;
2696 struct sbp2_command_info *command;
2697
2698 SBP2_ERR("aborting sbp2 command");
2699 print_command (SCpnt->cmnd);
2700
2701 if (scsi_id) {
2702
2703 /*
2704 * Right now, just return any matching command structures
2705 * to the free pool.
2706 */
2707 command = sbp2util_find_command_for_SCpnt(scsi_id, SCpnt);
2708 if (command) {
2709 SBP2_DEBUG("Found command to abort");
2710 pci_dma_sync_single_for_cpu(hi->host->pdev,
2711 command->command_orb_dma,
2712 sizeof(struct sbp2_command_orb),
2713 PCI_DMA_BIDIRECTIONAL);
2714 pci_dma_sync_single_for_cpu(hi->host->pdev,
2715 command->sge_dma,
2716 sizeof(command->scatter_gather_element),
2717 PCI_DMA_BIDIRECTIONAL);
2718 sbp2util_mark_command_completed(scsi_id, command);
2719 if (command->Current_SCpnt) {
2720 void (*done)(Scsi_Cmnd *) = command->Current_done;
2721 command->Current_SCpnt->result = DID_ABORT << 16;
2722 done (command->Current_SCpnt);
2723 }
2724 }
2725
2726 /*
2727 * Initiate a fetch agent reset.
2728 */
2729 sbp2_agent_reset(scsi_id, 0);
2730 sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY);
2731 }
2732
2733 return(SUCCESS);
2734 }
2735
2736 /*
2737 * Called by scsi stack when something has really gone wrong.
2738 */
2739 static int sbp2scsi_reset (Scsi_Cmnd *SCpnt)
2740 {
2741 struct scsi_id_instance_data *scsi_id =
2742 (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
2743
2744 SBP2_ERR("reset requested");
2745
2746 if (scsi_id) {
2747 SBP2_ERR("Generating sbp2 fetch agent reset");
2748 sbp2_agent_reset(scsi_id, 0);
2749 }
2750
2751 return(SUCCESS);
2752 }
2753
2754 static const char *sbp2scsi_info (struct Scsi_Host *host)
2755 {
2756 return "SCSI emulation for IEEE-1394 SBP-2 Devices";
2757 }
2758
2759 static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev, char *buf)
2760 {
2761 struct scsi_device *sdev;
2762 struct scsi_id_instance_data *scsi_id;
2763 int lun;
2764
2765 if (!(sdev = to_scsi_device(dev)))
2766 return 0;
2767
2768 if (!(scsi_id = (struct scsi_id_instance_data *)sdev->host->hostdata[0]))
2769 return 0;
2770
2771 if (scsi_id->sbp2_device_type_and_lun == SBP2_DEVICE_TYPE_LUN_UNINITIALIZED)
2772 lun = 0;
2773 else
2774 lun = ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun);
2775
2776 return sprintf(buf, "%016Lx:%d:%d\n", (unsigned long long)scsi_id->ne->guid,
2777 scsi_id->ud->id, lun);
2778 }
2779 static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL);
2780
2781 static struct device_attribute *sbp2_sysfs_sdev_attrs[] = {
2782 &dev_attr_ieee1394_id,
2783 NULL
2784 };
2785
2786 MODULE_AUTHOR("Ben Collins <bcollins@debian.org>");
2787 MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver");
2788 MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME);
2789 MODULE_LICENSE("GPL");
2790
2791 /* SCSI host template */
2792 static Scsi_Host_Template scsi_driver_template = {
2793 .module = THIS_MODULE,
2794 .name = "SBP-2 IEEE-1394",
2795 .proc_name = SBP2_DEVICE_NAME,
2796 .info = sbp2scsi_info,
2797 .queuecommand = sbp2scsi_queuecommand,
2798 .eh_abort_handler = sbp2scsi_abort,
2799 .eh_device_reset_handler = sbp2scsi_reset,
2800 .eh_bus_reset_handler = sbp2scsi_reset,
2801 .eh_host_reset_handler = sbp2scsi_reset,
2802 .slave_configure = sbp2scsi_slave_configure,
2803 .this_id = -1,
2804 .sg_tablesize = SG_ALL,
2805 .use_clustering = ENABLE_CLUSTERING,
2806 .cmd_per_lun = SBP2_MAX_CMDS,
2807 .can_queue = SBP2_MAX_CMDS,
2808 .emulated = 1,
2809 .sdev_attrs = sbp2_sysfs_sdev_attrs,
2810 };
2811
2812 static int sbp2_module_init(void)
2813 {
2814 int ret;
2815
2816 SBP2_DEBUG("sbp2_module_init");
2817
2818 printk(KERN_INFO "sbp2: %s\n", version);
2819
2820 /* Module load debug option to force one command at a time (serializing I/O) */
2821 if (serialize_io) {
2822 SBP2_ERR("Driver forced to serialize I/O (serialize_io = 1)");
2823 scsi_driver_template.can_queue = 1;
2824 scsi_driver_template.cmd_per_lun = 1;
2825 }
2826
2827 /* Set max sectors (module load option). Default is 255 sectors. */
2828 scsi_driver_template.max_sectors = max_sectors;
2829
2830
2831 /* Register our high level driver with 1394 stack */
2832 hpsb_register_highlevel(&sbp2_highlevel);
2833
2834 ret = hpsb_register_protocol(&sbp2_driver);
2835 if (ret) {
2836 SBP2_ERR("Failed to register protocol");
2837 hpsb_unregister_highlevel(&sbp2_highlevel);
2838 return ret;
2839 }
2840
2841 return 0;
2842 }
2843
2844 static void __exit sbp2_module_exit(void)
2845 {
2846 SBP2_DEBUG("sbp2_module_exit");
2847
2848 hpsb_unregister_protocol(&sbp2_driver);
2849
2850 hpsb_unregister_highlevel(&sbp2_highlevel);
2851 }
2852
2853 module_init(sbp2_module_init);
2854 module_exit(sbp2_module_exit);
2855
|
This page was automatically generated by the
LXR engine.
|