2 * sbp2.c - SBP-2 protocol driver for IEEE-1394
4 * Copyright (C) 2000 James Goodwin, Filanet Corporation (www.filanet.com)
5 * jamesg@filanet.com (JSG)
7 * Copyright (C) 2003 Ben Collins <bcollins@debian.org>
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.
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.
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.
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.
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.).
37 * - Error Handling: SCSI aborts and bus reset requests are handled somewhat
38 * but the code needs additional debugging.
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>
48 #include <linux/poll.h>
49 #include <linux/module.h>
50 #include <linux/moduleparam.h>
51 #include <linux/types.h>
52 #include <linux/delay.h>
53 #include <linux/sched.h>
54 #include <linux/blkdev.h>
55 #include <linux/smp_lock.h>
56 #include <linux/init.h>
57 #include <linux/pci.h>
59 #include <asm/current.h>
60 #include <asm/uaccess.h>
62 #include <asm/byteorder.h>
63 #include <asm/atomic.h>
64 #include <asm/system.h>
65 #include <asm/scatterlist.h>
67 #include <scsi/scsi.h>
68 #include <scsi/scsi_cmnd.h>
69 #include <scsi/scsi_dbg.h>
70 #include <scsi/scsi_device.h>
71 #include <scsi/scsi_host.h>
75 #include "ieee1394_types.h"
76 #include "ieee1394_core.h"
79 #include "highlevel.h"
80 #include "ieee1394_transactions.h"
83 static char version
[] __devinitdata
=
84 "$Rev: 1306 $ Ben Collins <bcollins@debian.org>";
87 * Module load parameter definitions
91 * Change max_speed on module load if you have a bad IEEE-1394
92 * controller that has trouble running 2KB packets at 400mb.
94 * NOTE: On certain OHCI parts I have seen short packets on async transmit
95 * (probably due to PCI latency/throughput issues with the part). You can
96 * bump down the speed if you are running into problems.
98 static int max_speed
= IEEE1394_SPEED_MAX
;
99 module_param(max_speed
, int, 0644);
100 MODULE_PARM_DESC(max_speed
, "Force max speed (3 = 800mb, 2 = 400mb default, 1 = 200mb, 0 = 100mb)");
103 * Set serialize_io to 1 if you'd like only one scsi command sent
104 * down to us at a time (debugging). This might be necessary for very
105 * badly behaved sbp2 devices.
107 static int serialize_io
;
108 module_param(serialize_io
, int, 0444);
109 MODULE_PARM_DESC(serialize_io
, "Serialize all I/O coming down from the scsi drivers (default = 0)");
112 * Bump up max_sectors if you'd like to support very large sized
113 * transfers. Please note that some older sbp2 bridge chips are broken for
114 * transfers greater or equal to 128KB. Default is a value of 255
115 * sectors, or just under 128KB (at 512 byte sector size). I can note that
116 * the Oxsemi sbp2 chipsets have no problems supporting very large
119 static int max_sectors
= SBP2_MAX_SECTORS
;
120 module_param(max_sectors
, int, 0444);
121 MODULE_PARM_DESC(max_sectors
, "Change max sectors per I/O supported (default = 255)");
124 * Exclusive login to sbp2 device? In most cases, the sbp2 driver should
125 * do an exclusive login, as it's generally unsafe to have two hosts
126 * talking to a single sbp2 device at the same time (filesystem coherency,
127 * etc.). If you're running an sbp2 device that supports multiple logins,
128 * and you're either running read-only filesystems or some sort of special
129 * filesystem supporting multiple hosts (one such filesystem is OpenGFS,
130 * see opengfs.sourceforge.net for more info), then set exclusive_login
131 * to zero. Note: The Oxsemi OXFW911 sbp2 chipset supports up to four
134 static int exclusive_login
= 1;
135 module_param(exclusive_login
, int, 0644);
136 MODULE_PARM_DESC(exclusive_login
, "Exclusive login to sbp2 device (default = 1)");
139 * SCSI inquiry hack for really badly behaved sbp2 devices. Turn this on
140 * if your sbp2 device is not properly handling the SCSI inquiry command.
141 * This hack makes the inquiry look more like a typical MS Windows
144 * If force_inquiry_hack=1 is required for your device to work,
145 * please submit the logged sbp2_firmware_revision value of this device to
146 * the linux1394-devel mailing list.
148 static int force_inquiry_hack
;
149 module_param(force_inquiry_hack
, int, 0444);
150 MODULE_PARM_DESC(force_inquiry_hack
, "Force SCSI inquiry hack (default = 0)");
154 * Export information about protocols/devices supported by this driver.
156 static struct ieee1394_device_id sbp2_id_table
[] = {
158 .match_flags
=IEEE1394_MATCH_SPECIFIER_ID
|
159 IEEE1394_MATCH_VERSION
,
160 .specifier_id
= SBP2_UNIT_SPEC_ID_ENTRY
& 0xffffff,
161 .version
= SBP2_SW_VERSION_ENTRY
& 0xffffff
166 MODULE_DEVICE_TABLE(ieee1394
, sbp2_id_table
);
169 * Debug levels, configured via kernel config, or enable here.
172 /* #define CONFIG_IEEE1394_SBP2_DEBUG_ORBS */
173 /* #define CONFIG_IEEE1394_SBP2_DEBUG_DMA */
174 /* #define CONFIG_IEEE1394_SBP2_DEBUG 1 */
175 /* #define CONFIG_IEEE1394_SBP2_DEBUG 2 */
176 /* #define CONFIG_IEEE1394_SBP2_PACKET_DUMP */
178 #ifdef CONFIG_IEEE1394_SBP2_DEBUG_ORBS
179 #define SBP2_ORB_DEBUG(fmt, args...) HPSB_ERR("sbp2(%s): "fmt, __FUNCTION__, ## args)
180 static u32 global_outstanding_command_orbs
= 0;
181 #define outstanding_orb_incr global_outstanding_command_orbs++
182 #define outstanding_orb_decr global_outstanding_command_orbs--
184 #define SBP2_ORB_DEBUG(fmt, args...)
185 #define outstanding_orb_incr
186 #define outstanding_orb_decr
189 #ifdef CONFIG_IEEE1394_SBP2_DEBUG_DMA
190 #define SBP2_DMA_ALLOC(fmt, args...) \
191 HPSB_ERR("sbp2(%s)alloc(%d): "fmt, __FUNCTION__, \
192 ++global_outstanding_dmas, ## args)
193 #define SBP2_DMA_FREE(fmt, args...) \
194 HPSB_ERR("sbp2(%s)free(%d): "fmt, __FUNCTION__, \
195 --global_outstanding_dmas, ## args)
196 static u32 global_outstanding_dmas
= 0;
198 #define SBP2_DMA_ALLOC(fmt, args...)
199 #define SBP2_DMA_FREE(fmt, args...)
202 #if CONFIG_IEEE1394_SBP2_DEBUG >= 2
203 #define SBP2_DEBUG(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
204 #define SBP2_INFO(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
205 #define SBP2_NOTICE(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
206 #define SBP2_WARN(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
207 #elif CONFIG_IEEE1394_SBP2_DEBUG == 1
208 #define SBP2_DEBUG(fmt, args...) HPSB_DEBUG("sbp2: "fmt, ## args)
209 #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
210 #define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args)
211 #define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args)
213 #define SBP2_DEBUG(fmt, args...)
214 #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args)
215 #define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args)
216 #define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args)
219 #define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
226 static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data
*scsi_id
,
229 static void sbp2scsi_complete_command(struct scsi_id_instance_data
*scsi_id
,
230 u32 scsi_status
, struct scsi_cmnd
*SCpnt
,
231 void (*done
)(struct scsi_cmnd
*));
233 static struct scsi_host_template scsi_driver_template
;
235 static const u8 sbp2_speedto_max_payload
[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC };
237 static void sbp2_host_reset(struct hpsb_host
*host
);
239 static int sbp2_probe(struct device
*dev
);
240 static int sbp2_remove(struct device
*dev
);
241 static int sbp2_update(struct unit_directory
*ud
);
243 static struct hpsb_highlevel sbp2_highlevel
= {
244 .name
= SBP2_DEVICE_NAME
,
245 .host_reset
= sbp2_host_reset
,
248 static struct hpsb_address_ops sbp2_ops
= {
249 .write
= sbp2_handle_status_write
252 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
253 static struct hpsb_address_ops sbp2_physdma_ops
= {
254 .read
= sbp2_handle_physdma_read
,
255 .write
= sbp2_handle_physdma_write
,
259 static struct hpsb_protocol_driver sbp2_driver
= {
260 .name
= "SBP2 Driver",
261 .id_table
= sbp2_id_table
,
262 .update
= sbp2_update
,
264 .name
= SBP2_DEVICE_NAME
,
265 .bus
= &ieee1394_bus_type
,
267 .remove
= sbp2_remove
,
272 /* List of device firmware's that require a forced 36 byte inquiry. */
273 static u32 sbp2_broken_inquiry_list
[] = {
274 0x00002800, /* Stefan Richter <richtest@bauwesen.tu-cottbus.de> */
275 /* DViCO Momobay CX-1 */
276 0x00000200 /* Andreas Plesch <plesch@fas.harvard.edu> */
277 /* QPS Fire DVDBurner */
280 #define NUM_BROKEN_INQUIRY_DEVS \
281 (sizeof(sbp2_broken_inquiry_list)/sizeof(*sbp2_broken_inquiry_list))
283 /**************************************
284 * General utility functions
285 **************************************/
290 * Converts a buffer from be32 to cpu byte ordering. Length is in bytes.
292 static __inline__
void sbp2util_be32_to_cpu_buffer(void *buffer
, int length
)
296 for (length
= (length
>> 2); length
--; )
297 temp
[length
] = be32_to_cpu(temp
[length
]);
303 * Converts a buffer from cpu to be32 byte ordering. Length is in bytes.
305 static __inline__
void sbp2util_cpu_to_be32_buffer(void *buffer
, int length
)
309 for (length
= (length
>> 2); length
--; )
310 temp
[length
] = cpu_to_be32(temp
[length
]);
314 #else /* BIG_ENDIAN */
315 /* Why waste the cpu cycles? */
316 #define sbp2util_be32_to_cpu_buffer(x,y)
317 #define sbp2util_cpu_to_be32_buffer(x,y)
320 #ifdef CONFIG_IEEE1394_SBP2_PACKET_DUMP
322 * Debug packet dump routine. Length is in bytes.
324 static void sbp2util_packet_dump(void *buffer
, int length
, char *dump_name
, u32 dump_phys_addr
)
327 unsigned char *dump
= buffer
;
329 if (!dump
|| !length
|| !dump_name
)
333 printk("[%s, 0x%x]", dump_name
, dump_phys_addr
);
335 printk("[%s]", dump_name
);
336 for (i
= 0; i
< length
; i
++) {
345 printk("%02x ", (int) dump
[i
]);
352 #define sbp2util_packet_dump(w,x,y,z)
356 * Goofy routine that basically does a down_timeout function.
358 static int sbp2util_down_timeout(atomic_t
*done
, int timeout
)
362 for (i
= timeout
; (i
> 0 && atomic_read(done
) == 0); i
-= HZ
/10) {
363 if (msleep_interruptible(100)) /* 100ms */
366 return ((i
> 0) ? 0:1);
369 /* Free's an allocated packet */
370 static void sbp2_free_packet(struct hpsb_packet
*packet
)
372 hpsb_free_tlabel(packet
);
373 hpsb_free_packet(packet
);
376 /* This is much like hpsb_node_write(), except it ignores the response
377 * subaction and returns immediately. Can be used from interrupts.
379 static int sbp2util_node_write_no_wait(struct node_entry
*ne
, u64 addr
,
380 quadlet_t
*buffer
, size_t length
)
382 struct hpsb_packet
*packet
;
384 packet
= hpsb_make_writepacket(ne
->host
, ne
->nodeid
,
385 addr
, buffer
, length
);
389 hpsb_set_packet_complete_task(packet
, (void (*)(void*))sbp2_free_packet
,
392 hpsb_node_fill_packet(ne
, packet
);
394 if (hpsb_send_packet(packet
) < 0) {
395 sbp2_free_packet(packet
);
403 * This function is called to create a pool of command orbs used for
404 * command processing. It is called when a new sbp2 device is detected.
406 static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data
*scsi_id
)
408 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
410 unsigned long flags
, orbs
;
411 struct sbp2_command_info
*command
;
413 orbs
= serialize_io
? 2 : SBP2_MAX_CMDS
;
415 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
416 for (i
= 0; i
< orbs
; i
++) {
417 command
= (struct sbp2_command_info
*)
418 kmalloc(sizeof(struct sbp2_command_info
), GFP_ATOMIC
);
420 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
423 memset(command
, '\0', sizeof(struct sbp2_command_info
));
424 command
->command_orb_dma
=
425 pci_map_single (hi
->host
->pdev
, &command
->command_orb
,
426 sizeof(struct sbp2_command_orb
),
427 PCI_DMA_BIDIRECTIONAL
);
428 SBP2_DMA_ALLOC("single command orb DMA");
430 pci_map_single (hi
->host
->pdev
, &command
->scatter_gather_element
,
431 sizeof(command
->scatter_gather_element
),
432 PCI_DMA_BIDIRECTIONAL
);
433 SBP2_DMA_ALLOC("scatter_gather_element");
434 INIT_LIST_HEAD(&command
->list
);
435 list_add_tail(&command
->list
, &scsi_id
->sbp2_command_orb_completed
);
437 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
442 * This function is called to delete a pool of command orbs.
444 static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data
*scsi_id
)
446 struct hpsb_host
*host
= scsi_id
->hi
->host
;
447 struct list_head
*lh
, *next
;
448 struct sbp2_command_info
*command
;
451 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
452 if (!list_empty(&scsi_id
->sbp2_command_orb_completed
)) {
453 list_for_each_safe(lh
, next
, &scsi_id
->sbp2_command_orb_completed
) {
454 command
= list_entry(lh
, struct sbp2_command_info
, list
);
456 /* Release our generic DMA's */
457 pci_unmap_single(host
->pdev
, command
->command_orb_dma
,
458 sizeof(struct sbp2_command_orb
),
459 PCI_DMA_BIDIRECTIONAL
);
460 SBP2_DMA_FREE("single command orb DMA");
461 pci_unmap_single(host
->pdev
, command
->sge_dma
,
462 sizeof(command
->scatter_gather_element
),
463 PCI_DMA_BIDIRECTIONAL
);
464 SBP2_DMA_FREE("scatter_gather_element");
469 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
474 * This function finds the sbp2_command for a given outstanding command
475 * orb.Only looks at the inuse list.
477 static struct sbp2_command_info
*sbp2util_find_command_for_orb(
478 struct scsi_id_instance_data
*scsi_id
, dma_addr_t orb
)
480 struct sbp2_command_info
*command
;
483 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
484 if (!list_empty(&scsi_id
->sbp2_command_orb_inuse
)) {
485 list_for_each_entry(command
, &scsi_id
->sbp2_command_orb_inuse
, list
) {
486 if (command
->command_orb_dma
== orb
) {
487 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
492 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
494 SBP2_ORB_DEBUG("could not match command orb %x", (unsigned int)orb
);
500 * This function finds the sbp2_command for a given outstanding SCpnt.
501 * Only looks at the inuse list.
503 static struct sbp2_command_info
*sbp2util_find_command_for_SCpnt(struct scsi_id_instance_data
*scsi_id
, void *SCpnt
)
505 struct sbp2_command_info
*command
;
508 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
509 if (!list_empty(&scsi_id
->sbp2_command_orb_inuse
)) {
510 list_for_each_entry(command
, &scsi_id
->sbp2_command_orb_inuse
, list
) {
511 if (command
->Current_SCpnt
== SCpnt
) {
512 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
517 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
522 * This function allocates a command orb used to send a scsi command.
524 static struct sbp2_command_info
*sbp2util_allocate_command_orb(
525 struct scsi_id_instance_data
*scsi_id
,
526 struct scsi_cmnd
*Current_SCpnt
,
527 void (*Current_done
)(struct scsi_cmnd
*))
529 struct list_head
*lh
;
530 struct sbp2_command_info
*command
= NULL
;
533 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
534 if (!list_empty(&scsi_id
->sbp2_command_orb_completed
)) {
535 lh
= scsi_id
->sbp2_command_orb_completed
.next
;
537 command
= list_entry(lh
, struct sbp2_command_info
, list
);
538 command
->Current_done
= Current_done
;
539 command
->Current_SCpnt
= Current_SCpnt
;
540 list_add_tail(&command
->list
, &scsi_id
->sbp2_command_orb_inuse
);
542 SBP2_ERR("sbp2util_allocate_command_orb - No orbs available!");
544 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
549 static void sbp2util_free_command_dma(struct sbp2_command_info
*command
)
551 struct scsi_id_instance_data
*scsi_id
=
552 (struct scsi_id_instance_data
*)command
->Current_SCpnt
->device
->host
->hostdata
[0];
553 struct hpsb_host
*host
;
556 printk(KERN_ERR
"%s: scsi_id == NULL\n", __FUNCTION__
);
560 host
= scsi_id
->ud
->ne
->host
;
562 if (command
->cmd_dma
) {
563 if (command
->dma_type
== CMD_DMA_SINGLE
) {
564 pci_unmap_single(host
->pdev
, command
->cmd_dma
,
565 command
->dma_size
, command
->dma_dir
);
566 SBP2_DMA_FREE("single bulk");
567 } else if (command
->dma_type
== CMD_DMA_PAGE
) {
568 pci_unmap_page(host
->pdev
, command
->cmd_dma
,
569 command
->dma_size
, command
->dma_dir
);
570 SBP2_DMA_FREE("single page");
571 } /* XXX: Check for CMD_DMA_NONE bug */
572 command
->dma_type
= CMD_DMA_NONE
;
573 command
->cmd_dma
= 0;
576 if (command
->sge_buffer
) {
577 pci_unmap_sg(host
->pdev
, command
->sge_buffer
,
578 command
->dma_size
, command
->dma_dir
);
579 SBP2_DMA_FREE("scatter list");
580 command
->sge_buffer
= NULL
;
585 * This function moves a command to the completed orb list.
587 static void sbp2util_mark_command_completed(struct scsi_id_instance_data
*scsi_id
, struct sbp2_command_info
*command
)
591 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
592 list_del(&command
->list
);
593 sbp2util_free_command_dma(command
);
594 list_add_tail(&command
->list
, &scsi_id
->sbp2_command_orb_completed
);
595 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
600 /*********************************************
601 * IEEE-1394 core driver stack related section
602 *********************************************/
603 static struct scsi_id_instance_data
*sbp2_alloc_device(struct unit_directory
*ud
);
605 static int sbp2_probe(struct device
*dev
)
607 struct unit_directory
*ud
;
608 struct scsi_id_instance_data
*scsi_id
;
610 SBP2_DEBUG("sbp2_probe");
612 ud
= container_of(dev
, struct unit_directory
, device
);
614 /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s)
616 if (ud
->flags
& UNIT_DIRECTORY_HAS_LUN_DIRECTORY
)
619 scsi_id
= sbp2_alloc_device(ud
);
624 sbp2_parse_unit_directory(scsi_id
, ud
);
626 return sbp2_start_device(scsi_id
);
629 static int sbp2_remove(struct device
*dev
)
631 struct unit_directory
*ud
;
632 struct scsi_id_instance_data
*scsi_id
;
634 SBP2_DEBUG("sbp2_remove");
636 ud
= container_of(dev
, struct unit_directory
, device
);
637 scsi_id
= ud
->device
.driver_data
;
639 sbp2_logout_device(scsi_id
);
640 sbp2_remove_device(scsi_id
);
645 static int sbp2_update(struct unit_directory
*ud
)
647 struct scsi_id_instance_data
*scsi_id
= ud
->device
.driver_data
;
649 SBP2_DEBUG("sbp2_update");
651 if (sbp2_reconnect_device(scsi_id
)) {
654 * Ok, reconnect has failed. Perhaps we didn't
655 * reconnect fast enough. Try doing a regular login, but
656 * first do a logout just in case of any weirdness.
658 sbp2_logout_device(scsi_id
);
660 if (sbp2_login_device(scsi_id
)) {
661 /* Login failed too, just fail, and the backend
662 * will call our sbp2_remove for us */
663 SBP2_ERR("Failed to reconnect to sbp2 device!");
668 /* Set max retries to something large on the device. */
669 sbp2_set_busy_timeout(scsi_id
);
671 /* Do a SBP-2 fetch agent reset. */
672 sbp2_agent_reset(scsi_id
, 1);
674 /* Get the max speed and packet size that we can use. */
675 sbp2_max_speed_and_size(scsi_id
);
677 /* Complete any pending commands with busy (so they get
678 * retried) and remove them from our queue
680 sbp2scsi_complete_all_commands(scsi_id
, DID_BUS_BUSY
);
682 /* Make sure we unblock requests (since this is likely after a bus
684 scsi_unblock_requests(scsi_id
->scsi_host
);
689 /* This functions is called by the sbp2_probe, for each new device. We now
690 * allocate one scsi host for each scsi_id (unit directory). */
691 static struct scsi_id_instance_data
*sbp2_alloc_device(struct unit_directory
*ud
)
693 struct sbp2scsi_host_info
*hi
;
694 struct Scsi_Host
*scsi_host
= NULL
;
695 struct scsi_id_instance_data
*scsi_id
= NULL
;
697 SBP2_DEBUG("sbp2_alloc_device");
699 scsi_id
= kmalloc(sizeof(*scsi_id
), GFP_KERNEL
);
701 SBP2_ERR("failed to create scsi_id");
704 memset(scsi_id
, 0, sizeof(*scsi_id
));
706 scsi_id
->ne
= ud
->ne
;
708 scsi_id
->speed_code
= IEEE1394_SPEED_100
;
709 scsi_id
->max_payload_size
= sbp2_speedto_max_payload
[IEEE1394_SPEED_100
];
710 atomic_set(&scsi_id
->sbp2_login_complete
, 0);
711 INIT_LIST_HEAD(&scsi_id
->sbp2_command_orb_inuse
);
712 INIT_LIST_HEAD(&scsi_id
->sbp2_command_orb_completed
);
713 INIT_LIST_HEAD(&scsi_id
->scsi_list
);
714 spin_lock_init(&scsi_id
->sbp2_command_orb_lock
);
715 scsi_id
->sbp2_device_type_and_lun
= SBP2_DEVICE_TYPE_LUN_UNINITIALIZED
;
717 ud
->device
.driver_data
= scsi_id
;
719 hi
= hpsb_get_hostinfo(&sbp2_highlevel
, ud
->ne
->host
);
721 hi
= hpsb_create_hostinfo(&sbp2_highlevel
, ud
->ne
->host
, sizeof(*hi
));
723 SBP2_ERR("failed to allocate hostinfo");
726 SBP2_DEBUG("sbp2_alloc_device: allocated hostinfo");
727 hi
->host
= ud
->ne
->host
;
728 INIT_LIST_HEAD(&hi
->scsi_ids
);
730 /* Register our sbp2 status address space... */
731 hpsb_register_addrspace(&sbp2_highlevel
, ud
->ne
->host
, &sbp2_ops
,
732 SBP2_STATUS_FIFO_ADDRESS
,
733 SBP2_STATUS_FIFO_ADDRESS
+
734 SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(SBP2_MAX_UDS_PER_NODE
+1));
735 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
736 /* Handle data movement if physical dma is not
737 * enabled/supportedon host controller */
738 hpsb_register_addrspace(&sbp2_highlevel
, ud
->ne
->host
, &sbp2_physdma_ops
,
739 0x0ULL
, 0xfffffffcULL
);
745 list_add_tail(&scsi_id
->scsi_list
, &hi
->scsi_ids
);
747 /* Register our host with the SCSI stack. */
748 scsi_host
= scsi_host_alloc(&scsi_driver_template
,
749 sizeof (unsigned long));
751 SBP2_ERR("failed to register scsi host");
755 scsi_host
->hostdata
[0] = (unsigned long)scsi_id
;
757 if (!scsi_add_host(scsi_host
, &ud
->device
)) {
758 scsi_id
->scsi_host
= scsi_host
;
762 SBP2_ERR("failed to add scsi host");
763 scsi_host_put(scsi_host
);
766 sbp2_remove_device(scsi_id
);
771 static void sbp2_host_reset(struct hpsb_host
*host
)
773 struct sbp2scsi_host_info
*hi
;
774 struct scsi_id_instance_data
*scsi_id
;
776 hi
= hpsb_get_hostinfo(&sbp2_highlevel
, host
);
779 list_for_each_entry(scsi_id
, &hi
->scsi_ids
, scsi_list
)
780 scsi_block_requests(scsi_id
->scsi_host
);
786 * This function is where we first pull the node unique ids, and then
787 * allocate memory and register a SBP-2 device.
789 static int sbp2_start_device(struct scsi_id_instance_data
*scsi_id
)
791 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
792 struct scsi_device
*sdev
;
794 SBP2_DEBUG("sbp2_start_device");
797 scsi_id
->login_response
=
798 pci_alloc_consistent(hi
->host
->pdev
, sizeof(struct sbp2_login_response
),
799 &scsi_id
->login_response_dma
);
800 if (!scsi_id
->login_response
)
802 SBP2_DMA_ALLOC("consistent DMA region for login FIFO");
804 /* Query logins ORB DMA */
805 scsi_id
->query_logins_orb
=
806 pci_alloc_consistent(hi
->host
->pdev
, sizeof(struct sbp2_query_logins_orb
),
807 &scsi_id
->query_logins_orb_dma
);
808 if (!scsi_id
->query_logins_orb
)
810 SBP2_DMA_ALLOC("consistent DMA region for query logins ORB");
812 /* Query logins response DMA */
813 scsi_id
->query_logins_response
=
814 pci_alloc_consistent(hi
->host
->pdev
, sizeof(struct sbp2_query_logins_response
),
815 &scsi_id
->query_logins_response_dma
);
816 if (!scsi_id
->query_logins_response
)
818 SBP2_DMA_ALLOC("consistent DMA region for query logins response");
820 /* Reconnect ORB DMA */
821 scsi_id
->reconnect_orb
=
822 pci_alloc_consistent(hi
->host
->pdev
, sizeof(struct sbp2_reconnect_orb
),
823 &scsi_id
->reconnect_orb_dma
);
824 if (!scsi_id
->reconnect_orb
)
826 SBP2_DMA_ALLOC("consistent DMA region for reconnect ORB");
829 scsi_id
->logout_orb
=
830 pci_alloc_consistent(hi
->host
->pdev
, sizeof(struct sbp2_logout_orb
),
831 &scsi_id
->logout_orb_dma
);
832 if (!scsi_id
->logout_orb
)
834 SBP2_DMA_ALLOC("consistent DMA region for logout ORB");
838 pci_alloc_consistent(hi
->host
->pdev
, sizeof(struct sbp2_login_orb
),
839 &scsi_id
->login_orb_dma
);
840 if (!scsi_id
->login_orb
) {
842 if (scsi_id
->query_logins_response
) {
843 pci_free_consistent(hi
->host
->pdev
,
844 sizeof(struct sbp2_query_logins_response
),
845 scsi_id
->query_logins_response
,
846 scsi_id
->query_logins_response_dma
);
847 SBP2_DMA_FREE("query logins response DMA");
850 if (scsi_id
->query_logins_orb
) {
851 pci_free_consistent(hi
->host
->pdev
,
852 sizeof(struct sbp2_query_logins_orb
),
853 scsi_id
->query_logins_orb
,
854 scsi_id
->query_logins_orb_dma
);
855 SBP2_DMA_FREE("query logins ORB DMA");
858 if (scsi_id
->logout_orb
) {
859 pci_free_consistent(hi
->host
->pdev
,
860 sizeof(struct sbp2_logout_orb
),
862 scsi_id
->logout_orb_dma
);
863 SBP2_DMA_FREE("logout ORB DMA");
866 if (scsi_id
->reconnect_orb
) {
867 pci_free_consistent(hi
->host
->pdev
,
868 sizeof(struct sbp2_reconnect_orb
),
869 scsi_id
->reconnect_orb
,
870 scsi_id
->reconnect_orb_dma
);
871 SBP2_DMA_FREE("reconnect ORB DMA");
874 if (scsi_id
->login_response
) {
875 pci_free_consistent(hi
->host
->pdev
,
876 sizeof(struct sbp2_login_response
),
877 scsi_id
->login_response
,
878 scsi_id
->login_response_dma
);
879 SBP2_DMA_FREE("login FIFO DMA");
882 list_del(&scsi_id
->scsi_list
);
886 SBP2_ERR ("Could not allocate memory for scsi_id");
890 SBP2_DMA_ALLOC("consistent DMA region for login ORB");
892 SBP2_DEBUG("New SBP-2 device inserted, SCSI ID = %x", scsi_id
->ud
->id
);
895 * Create our command orb pool
897 if (sbp2util_create_command_orb_pool(scsi_id
)) {
898 SBP2_ERR("sbp2util_create_command_orb_pool failed!");
899 sbp2_remove_device(scsi_id
);
903 /* Schedule a timeout here. The reason is that we may be so close
904 * to a bus reset, that the device is not available for logins.
905 * This can happen when the bus reset is caused by the host
906 * connected to the sbp2 device being removed. That host would
907 * have a certain amount of time to relogin before the sbp2 device
908 * allows someone else to login instead. One second makes sense. */
909 msleep_interruptible(1000);
910 if (signal_pending(current
)) {
911 SBP2_WARN("aborting sbp2_start_device due to event");
912 sbp2_remove_device(scsi_id
);
917 * Login to the sbp-2 device
919 if (sbp2_login_device(scsi_id
)) {
920 /* Login failed, just remove the device. */
921 sbp2_remove_device(scsi_id
);
926 * Set max retries to something large on the device
928 sbp2_set_busy_timeout(scsi_id
);
931 * Do a SBP-2 fetch agent reset
933 sbp2_agent_reset(scsi_id
, 1);
936 * Get the max speed and packet size that we can use
938 sbp2_max_speed_and_size(scsi_id
);
940 /* Add this device to the scsi layer now */
941 sdev
= scsi_add_device(scsi_id
->scsi_host
, 0, scsi_id
->ud
->id
, 0);
943 SBP2_ERR("scsi_add_device failed");
944 return PTR_ERR(sdev
);
951 * This function removes an sbp2 device from the sbp2scsi_host_info struct.
953 static void sbp2_remove_device(struct scsi_id_instance_data
*scsi_id
)
955 struct sbp2scsi_host_info
*hi
;
957 SBP2_DEBUG("sbp2_remove_device");
964 /* This will remove our scsi device aswell */
965 if (scsi_id
->scsi_host
) {
966 scsi_remove_host(scsi_id
->scsi_host
);
967 scsi_host_put(scsi_id
->scsi_host
);
970 sbp2util_remove_command_orb_pool(scsi_id
);
972 list_del(&scsi_id
->scsi_list
);
974 if (scsi_id
->login_response
) {
975 pci_free_consistent(hi
->host
->pdev
,
976 sizeof(struct sbp2_login_response
),
977 scsi_id
->login_response
,
978 scsi_id
->login_response_dma
);
979 SBP2_DMA_FREE("single login FIFO");
982 if (scsi_id
->login_orb
) {
983 pci_free_consistent(hi
->host
->pdev
,
984 sizeof(struct sbp2_login_orb
),
986 scsi_id
->login_orb_dma
);
987 SBP2_DMA_FREE("single login ORB");
990 if (scsi_id
->reconnect_orb
) {
991 pci_free_consistent(hi
->host
->pdev
,
992 sizeof(struct sbp2_reconnect_orb
),
993 scsi_id
->reconnect_orb
,
994 scsi_id
->reconnect_orb_dma
);
995 SBP2_DMA_FREE("single reconnect orb");
998 if (scsi_id
->logout_orb
) {
999 pci_free_consistent(hi
->host
->pdev
,
1000 sizeof(struct sbp2_logout_orb
),
1001 scsi_id
->logout_orb
,
1002 scsi_id
->logout_orb_dma
);
1003 SBP2_DMA_FREE("single logout orb");
1006 if (scsi_id
->query_logins_orb
) {
1007 pci_free_consistent(hi
->host
->pdev
,
1008 sizeof(struct sbp2_query_logins_orb
),
1009 scsi_id
->query_logins_orb
,
1010 scsi_id
->query_logins_orb_dma
);
1011 SBP2_DMA_FREE("single query logins orb");
1014 if (scsi_id
->query_logins_response
) {
1015 pci_free_consistent(hi
->host
->pdev
,
1016 sizeof(struct sbp2_query_logins_response
),
1017 scsi_id
->query_logins_response
,
1018 scsi_id
->query_logins_response_dma
);
1019 SBP2_DMA_FREE("single query logins data");
1022 scsi_id
->ud
->device
.driver_data
= NULL
;
1024 SBP2_DEBUG("SBP-2 device removed, SCSI ID = %d", scsi_id
->ud
->id
);
1029 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
1031 * This function deals with physical dma write requests (for adapters that do not support
1032 * physical dma in hardware). Mostly just here for debugging...
1034 static int sbp2_handle_physdma_write(struct hpsb_host
*host
, int nodeid
, int destid
, quadlet_t
*data
,
1035 u64 addr
, size_t length
, u16 flags
)
1039 * Manually put the data in the right place.
1041 memcpy(bus_to_virt((u32
)addr
), data
, length
);
1042 sbp2util_packet_dump(data
, length
, "sbp2 phys dma write by device", (u32
)addr
);
1043 return(RCODE_COMPLETE
);
1047 * This function deals with physical dma read requests (for adapters that do not support
1048 * physical dma in hardware). Mostly just here for debugging...
1050 static int sbp2_handle_physdma_read(struct hpsb_host
*host
, int nodeid
, quadlet_t
*data
,
1051 u64 addr
, size_t length
, u16 flags
)
1055 * Grab data from memory and send a read response.
1057 memcpy(data
, bus_to_virt((u32
)addr
), length
);
1058 sbp2util_packet_dump(data
, length
, "sbp2 phys dma read by device", (u32
)addr
);
1059 return(RCODE_COMPLETE
);
1064 /**************************************
1065 * SBP-2 protocol related section
1066 **************************************/
1069 * This function determines if we should convert scsi commands for a particular sbp2 device type
1071 static __inline__
int sbp2_command_conversion_device_type(u8 device_type
)
1073 return (((device_type
== TYPE_DISK
) ||
1074 (device_type
== TYPE_RBC
) ||
1075 (device_type
== TYPE_ROM
)) ? 1:0);
1079 * This function queries the device for the maximum concurrent logins it
1082 static int sbp2_query_logins(struct scsi_id_instance_data
*scsi_id
)
1084 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1089 SBP2_DEBUG("sbp2_query_logins");
1091 scsi_id
->query_logins_orb
->reserved1
= 0x0;
1092 scsi_id
->query_logins_orb
->reserved2
= 0x0;
1094 scsi_id
->query_logins_orb
->query_response_lo
= scsi_id
->query_logins_response_dma
;
1095 scsi_id
->query_logins_orb
->query_response_hi
= ORB_SET_NODE_ID(hi
->host
->node_id
);
1096 SBP2_DEBUG("sbp2_query_logins: query_response_hi/lo initialized");
1098 scsi_id
->query_logins_orb
->lun_misc
= ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST
);
1099 scsi_id
->query_logins_orb
->lun_misc
|= ORB_SET_NOTIFY(1);
1100 if (scsi_id
->sbp2_device_type_and_lun
!= SBP2_DEVICE_TYPE_LUN_UNINITIALIZED
) {
1101 scsi_id
->query_logins_orb
->lun_misc
|= ORB_SET_LUN(scsi_id
->sbp2_device_type_and_lun
);
1102 SBP2_DEBUG("sbp2_query_logins: set lun to %d",
1103 ORB_SET_LUN(scsi_id
->sbp2_device_type_and_lun
));
1105 SBP2_DEBUG("sbp2_query_logins: lun_misc initialized");
1107 scsi_id
->query_logins_orb
->reserved_resp_length
=
1108 ORB_SET_QUERY_LOGINS_RESP_LENGTH(sizeof(struct sbp2_query_logins_response
));
1109 SBP2_DEBUG("sbp2_query_logins: reserved_resp_length initialized");
1111 scsi_id
->query_logins_orb
->status_FIFO_lo
= SBP2_STATUS_FIFO_ADDRESS_LO
+
1112 SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id
->ud
->id
);
1113 scsi_id
->query_logins_orb
->status_FIFO_hi
= (ORB_SET_NODE_ID(hi
->host
->node_id
) |
1114 SBP2_STATUS_FIFO_ADDRESS_HI
);
1115 SBP2_DEBUG("sbp2_query_logins: status FIFO initialized");
1117 sbp2util_cpu_to_be32_buffer(scsi_id
->query_logins_orb
, sizeof(struct sbp2_query_logins_orb
));
1119 SBP2_DEBUG("sbp2_query_logins: orb byte-swapped");
1121 sbp2util_packet_dump(scsi_id
->query_logins_orb
, sizeof(struct sbp2_query_logins_orb
),
1122 "sbp2 query logins orb", scsi_id
->query_logins_orb_dma
);
1124 memset(scsi_id
->query_logins_response
, 0, sizeof(struct sbp2_query_logins_response
));
1125 memset(&scsi_id
->status_block
, 0, sizeof(struct sbp2_status_block
));
1127 SBP2_DEBUG("sbp2_query_logins: query_logins_response/status FIFO memset");
1129 data
[0] = ORB_SET_NODE_ID(hi
->host
->node_id
);
1130 data
[1] = scsi_id
->query_logins_orb_dma
;
1131 sbp2util_cpu_to_be32_buffer(data
, 8);
1133 atomic_set(&scsi_id
->sbp2_login_complete
, 0);
1135 SBP2_DEBUG("sbp2_query_logins: prepared to write");
1136 hpsb_node_write(scsi_id
->ne
, scsi_id
->sbp2_management_agent_addr
, data
, 8);
1137 SBP2_DEBUG("sbp2_query_logins: written");
1139 if (sbp2util_down_timeout(&scsi_id
->sbp2_login_complete
, 2*HZ
)) {
1140 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1144 if (scsi_id
->status_block
.ORB_offset_lo
!= scsi_id
->query_logins_orb_dma
) {
1145 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1149 if (STATUS_GET_RESP(scsi_id
->status_block
.ORB_offset_hi_misc
) ||
1150 STATUS_GET_DEAD_BIT(scsi_id
->status_block
.ORB_offset_hi_misc
) ||
1151 STATUS_GET_SBP_STATUS(scsi_id
->status_block
.ORB_offset_hi_misc
)) {
1153 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1157 sbp2util_cpu_to_be32_buffer(scsi_id
->query_logins_response
, sizeof(struct sbp2_query_logins_response
));
1159 SBP2_DEBUG("length_max_logins = %x",
1160 (unsigned int)scsi_id
->query_logins_response
->length_max_logins
);
1162 SBP2_DEBUG("Query logins to SBP-2 device successful");
1164 max_logins
= RESPONSE_GET_MAX_LOGINS(scsi_id
->query_logins_response
->length_max_logins
);
1165 SBP2_DEBUG("Maximum concurrent logins supported: %d", max_logins
);
1167 active_logins
= RESPONSE_GET_ACTIVE_LOGINS(scsi_id
->query_logins_response
->length_max_logins
);
1168 SBP2_DEBUG("Number of active logins: %d", active_logins
);
1170 if (active_logins
>= max_logins
) {
1178 * This function is called in order to login to a particular SBP-2 device,
1179 * after a bus reset.
1181 static int sbp2_login_device(struct scsi_id_instance_data
*scsi_id
)
1183 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1186 SBP2_DEBUG("sbp2_login_device");
1188 if (!scsi_id
->login_orb
) {
1189 SBP2_DEBUG("sbp2_login_device: login_orb not alloc'd!");
1193 if (!exclusive_login
) {
1194 if (sbp2_query_logins(scsi_id
)) {
1195 SBP2_INFO("Device does not support any more concurrent logins");
1200 /* Set-up login ORB, assume no password */
1201 scsi_id
->login_orb
->password_hi
= 0;
1202 scsi_id
->login_orb
->password_lo
= 0;
1203 SBP2_DEBUG("sbp2_login_device: password_hi/lo initialized");
1205 scsi_id
->login_orb
->login_response_lo
= scsi_id
->login_response_dma
;
1206 scsi_id
->login_orb
->login_response_hi
= ORB_SET_NODE_ID(hi
->host
->node_id
);
1207 SBP2_DEBUG("sbp2_login_device: login_response_hi/lo initialized");
1209 scsi_id
->login_orb
->lun_misc
= ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST
);
1210 scsi_id
->login_orb
->lun_misc
|= ORB_SET_RECONNECT(0); /* One second reconnect time */
1211 scsi_id
->login_orb
->lun_misc
|= ORB_SET_EXCLUSIVE(exclusive_login
); /* Exclusive access to device */
1212 scsi_id
->login_orb
->lun_misc
|= ORB_SET_NOTIFY(1); /* Notify us of login complete */
1213 /* Set the lun if we were able to pull it from the device's unit directory */
1214 if (scsi_id
->sbp2_device_type_and_lun
!= SBP2_DEVICE_TYPE_LUN_UNINITIALIZED
) {
1215 scsi_id
->login_orb
->lun_misc
|= ORB_SET_LUN(scsi_id
->sbp2_device_type_and_lun
);
1216 SBP2_DEBUG("sbp2_query_logins: set lun to %d",
1217 ORB_SET_LUN(scsi_id
->sbp2_device_type_and_lun
));
1219 SBP2_DEBUG("sbp2_login_device: lun_misc initialized");
1221 scsi_id
->login_orb
->passwd_resp_lengths
=
1222 ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response
));
1223 SBP2_DEBUG("sbp2_login_device: passwd_resp_lengths initialized");
1225 scsi_id
->login_orb
->status_FIFO_lo
= SBP2_STATUS_FIFO_ADDRESS_LO
+
1226 SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id
->ud
->id
);
1227 scsi_id
->login_orb
->status_FIFO_hi
= (ORB_SET_NODE_ID(hi
->host
->node_id
) |
1228 SBP2_STATUS_FIFO_ADDRESS_HI
);
1229 SBP2_DEBUG("sbp2_login_device: status FIFO initialized");
1232 * Byte swap ORB if necessary
1234 sbp2util_cpu_to_be32_buffer(scsi_id
->login_orb
, sizeof(struct sbp2_login_orb
));
1236 SBP2_DEBUG("sbp2_login_device: orb byte-swapped");
1238 sbp2util_packet_dump(scsi_id
->login_orb
, sizeof(struct sbp2_login_orb
),
1239 "sbp2 login orb", scsi_id
->login_orb_dma
);
1242 * Initialize login response and status fifo
1244 memset(scsi_id
->login_response
, 0, sizeof(struct sbp2_login_response
));
1245 memset(&scsi_id
->status_block
, 0, sizeof(struct sbp2_status_block
));
1247 SBP2_DEBUG("sbp2_login_device: login_response/status FIFO memset");
1250 * Ok, let's write to the target's management agent register
1252 data
[0] = ORB_SET_NODE_ID(hi
->host
->node_id
);
1253 data
[1] = scsi_id
->login_orb_dma
;
1254 sbp2util_cpu_to_be32_buffer(data
, 8);
1256 atomic_set(&scsi_id
->sbp2_login_complete
, 0);
1258 SBP2_DEBUG("sbp2_login_device: prepared to write to %08x",
1259 (unsigned int)scsi_id
->sbp2_management_agent_addr
);
1260 hpsb_node_write(scsi_id
->ne
, scsi_id
->sbp2_management_agent_addr
, data
, 8);
1261 SBP2_DEBUG("sbp2_login_device: written");
1264 * Wait for login status (up to 20 seconds)...
1266 if (sbp2util_down_timeout(&scsi_id
->sbp2_login_complete
, 20*HZ
)) {
1267 SBP2_ERR("Error logging into SBP-2 device - login timed-out");
1272 * Sanity. Make sure status returned matches login orb.
1274 if (scsi_id
->status_block
.ORB_offset_lo
!= scsi_id
->login_orb_dma
) {
1275 SBP2_ERR("Error logging into SBP-2 device - login timed-out");
1282 if (STATUS_GET_RESP(scsi_id
->status_block
.ORB_offset_hi_misc
) ||
1283 STATUS_GET_DEAD_BIT(scsi_id
->status_block
.ORB_offset_hi_misc
) ||
1284 STATUS_GET_SBP_STATUS(scsi_id
->status_block
.ORB_offset_hi_misc
)) {
1286 SBP2_ERR("Error logging into SBP-2 device - login failed");
1291 * Byte swap the login response, for use when reconnecting or
1294 sbp2util_cpu_to_be32_buffer(scsi_id
->login_response
, sizeof(struct sbp2_login_response
));
1297 * Grab our command block agent address from the login response.
1299 SBP2_DEBUG("command_block_agent_hi = %x",
1300 (unsigned int)scsi_id
->login_response
->command_block_agent_hi
);
1301 SBP2_DEBUG("command_block_agent_lo = %x",
1302 (unsigned int)scsi_id
->login_response
->command_block_agent_lo
);
1304 scsi_id
->sbp2_command_block_agent_addr
=
1305 ((u64
)scsi_id
->login_response
->command_block_agent_hi
) << 32;
1306 scsi_id
->sbp2_command_block_agent_addr
|= ((u64
)scsi_id
->login_response
->command_block_agent_lo
);
1307 scsi_id
->sbp2_command_block_agent_addr
&= 0x0000ffffffffffffULL
;
1309 SBP2_INFO("Logged into SBP-2 device");
1316 * This function is called in order to logout from a particular SBP-2
1317 * device, usually called during driver unload.
1319 static int sbp2_logout_device(struct scsi_id_instance_data
*scsi_id
)
1321 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1325 SBP2_DEBUG("sbp2_logout_device");
1330 scsi_id
->logout_orb
->reserved1
= 0x0;
1331 scsi_id
->logout_orb
->reserved2
= 0x0;
1332 scsi_id
->logout_orb
->reserved3
= 0x0;
1333 scsi_id
->logout_orb
->reserved4
= 0x0;
1335 scsi_id
->logout_orb
->login_ID_misc
= ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST
);
1336 scsi_id
->logout_orb
->login_ID_misc
|= ORB_SET_LOGIN_ID(scsi_id
->login_response
->length_login_ID
);
1338 /* Notify us when complete */
1339 scsi_id
->logout_orb
->login_ID_misc
|= ORB_SET_NOTIFY(1);
1341 scsi_id
->logout_orb
->reserved5
= 0x0;
1342 scsi_id
->logout_orb
->status_FIFO_lo
= SBP2_STATUS_FIFO_ADDRESS_LO
+
1343 SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id
->ud
->id
);
1344 scsi_id
->logout_orb
->status_FIFO_hi
= (ORB_SET_NODE_ID(hi
->host
->node_id
) |
1345 SBP2_STATUS_FIFO_ADDRESS_HI
);
1348 * Byte swap ORB if necessary
1350 sbp2util_cpu_to_be32_buffer(scsi_id
->logout_orb
, sizeof(struct sbp2_logout_orb
));
1352 sbp2util_packet_dump(scsi_id
->logout_orb
, sizeof(struct sbp2_logout_orb
),
1353 "sbp2 logout orb", scsi_id
->logout_orb_dma
);
1356 * Ok, let's write to the target's management agent register
1358 data
[0] = ORB_SET_NODE_ID(hi
->host
->node_id
);
1359 data
[1] = scsi_id
->logout_orb_dma
;
1360 sbp2util_cpu_to_be32_buffer(data
, 8);
1362 atomic_set(&scsi_id
->sbp2_login_complete
, 0);
1364 error
= hpsb_node_write(scsi_id
->ne
,
1365 scsi_id
->sbp2_management_agent_addr
,
1370 /* Wait for device to logout...1 second. */
1371 if (sbp2util_down_timeout(&scsi_id
->sbp2_login_complete
, HZ
))
1374 SBP2_INFO("Logged out of SBP-2 device");
1381 * This function is called in order to reconnect to a particular SBP-2
1382 * device, after a bus reset.
1384 static int sbp2_reconnect_device(struct scsi_id_instance_data
*scsi_id
)
1386 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1390 SBP2_DEBUG("sbp2_reconnect_device");
1393 * Set-up reconnect ORB
1395 scsi_id
->reconnect_orb
->reserved1
= 0x0;
1396 scsi_id
->reconnect_orb
->reserved2
= 0x0;
1397 scsi_id
->reconnect_orb
->reserved3
= 0x0;
1398 scsi_id
->reconnect_orb
->reserved4
= 0x0;
1400 scsi_id
->reconnect_orb
->login_ID_misc
= ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST
);
1401 scsi_id
->reconnect_orb
->login_ID_misc
|=
1402 ORB_SET_LOGIN_ID(scsi_id
->login_response
->length_login_ID
);
1404 /* Notify us when complete */
1405 scsi_id
->reconnect_orb
->login_ID_misc
|= ORB_SET_NOTIFY(1);
1407 scsi_id
->reconnect_orb
->reserved5
= 0x0;
1408 scsi_id
->reconnect_orb
->status_FIFO_lo
= SBP2_STATUS_FIFO_ADDRESS_LO
+
1409 SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id
->ud
->id
);
1410 scsi_id
->reconnect_orb
->status_FIFO_hi
=
1411 (ORB_SET_NODE_ID(hi
->host
->node_id
) | SBP2_STATUS_FIFO_ADDRESS_HI
);
1414 * Byte swap ORB if necessary
1416 sbp2util_cpu_to_be32_buffer(scsi_id
->reconnect_orb
, sizeof(struct sbp2_reconnect_orb
));
1418 sbp2util_packet_dump(scsi_id
->reconnect_orb
, sizeof(struct sbp2_reconnect_orb
),
1419 "sbp2 reconnect orb", scsi_id
->reconnect_orb_dma
);
1422 * Initialize status fifo
1424 memset(&scsi_id
->status_block
, 0, sizeof(struct sbp2_status_block
));
1427 * Ok, let's write to the target's management agent register
1429 data
[0] = ORB_SET_NODE_ID(hi
->host
->node_id
);
1430 data
[1] = scsi_id
->reconnect_orb_dma
;
1431 sbp2util_cpu_to_be32_buffer(data
, 8);
1433 atomic_set(&scsi_id
->sbp2_login_complete
, 0);
1435 error
= hpsb_node_write(scsi_id
->ne
,
1436 scsi_id
->sbp2_management_agent_addr
,
1442 * Wait for reconnect status (up to 1 second)...
1444 if (sbp2util_down_timeout(&scsi_id
->sbp2_login_complete
, HZ
)) {
1445 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out");
1450 * Sanity. Make sure status returned matches reconnect orb.
1452 if (scsi_id
->status_block
.ORB_offset_lo
!= scsi_id
->reconnect_orb_dma
) {
1453 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out");
1460 if (STATUS_GET_RESP(scsi_id
->status_block
.ORB_offset_hi_misc
) ||
1461 STATUS_GET_DEAD_BIT(scsi_id
->status_block
.ORB_offset_hi_misc
) ||
1462 STATUS_GET_SBP_STATUS(scsi_id
->status_block
.ORB_offset_hi_misc
)) {
1464 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect failed");
1468 HPSB_DEBUG("Reconnected to SBP-2 device");
1475 * This function is called in order to set the busy timeout (number of
1476 * retries to attempt) on the sbp2 device.
1478 static int sbp2_set_busy_timeout(struct scsi_id_instance_data
*scsi_id
)
1482 SBP2_DEBUG("sbp2_set_busy_timeout");
1485 * Ok, let's write to the target's busy timeout register
1487 data
= cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE
);
1489 if (hpsb_node_write(scsi_id
->ne
, SBP2_BUSY_TIMEOUT_ADDRESS
, &data
, 4)) {
1490 SBP2_ERR("sbp2_set_busy_timeout error");
1498 * This function is called to parse sbp2 device's config rom unit
1499 * directory. Used to determine things like sbp2 management agent offset,
1500 * and command set used (SCSI or RBC).
1502 static void sbp2_parse_unit_directory(struct scsi_id_instance_data
*scsi_id
,
1503 struct unit_directory
*ud
)
1505 struct csr1212_keyval
*kv
;
1506 struct csr1212_dentry
*dentry
;
1507 u64 management_agent_addr
;
1508 u32 command_set_spec_id
, command_set
, unit_characteristics
,
1509 firmware_revision
, workarounds
;
1512 SBP2_DEBUG("sbp2_parse_unit_directory");
1514 management_agent_addr
= 0x0;
1515 command_set_spec_id
= 0x0;
1517 unit_characteristics
= 0x0;
1518 firmware_revision
= 0x0;
1520 /* Handle different fields in the unit directory, based on keys */
1521 csr1212_for_each_dir_entry(ud
->ne
->csr
, kv
, ud
->ud_kv
, dentry
) {
1522 switch (kv
->key
.id
) {
1523 case CSR1212_KV_ID_DEPENDENT_INFO
:
1524 if (kv
->key
.type
== CSR1212_KV_TYPE_CSR_OFFSET
) {
1525 /* Save off the management agent address */
1526 management_agent_addr
=
1527 CSR1212_REGISTER_SPACE_BASE
+
1528 (kv
->value
.csr_offset
<< 2);
1530 SBP2_DEBUG("sbp2_management_agent_addr = %x",
1531 (unsigned int) management_agent_addr
);
1532 } else if (kv
->key
.type
== CSR1212_KV_TYPE_IMMEDIATE
) {
1533 scsi_id
->sbp2_device_type_and_lun
= kv
->value
.immediate
;
1537 case SBP2_COMMAND_SET_SPEC_ID_KEY
:
1538 /* Command spec organization */
1539 command_set_spec_id
= kv
->value
.immediate
;
1540 SBP2_DEBUG("sbp2_command_set_spec_id = %x",
1541 (unsigned int) command_set_spec_id
);
1544 case SBP2_COMMAND_SET_KEY
:
1545 /* Command set used by sbp2 device */
1546 command_set
= kv
->value
.immediate
;
1547 SBP2_DEBUG("sbp2_command_set = %x",
1548 (unsigned int) command_set
);
1551 case SBP2_UNIT_CHARACTERISTICS_KEY
:
1553 * Unit characterisitcs (orb related stuff
1554 * that I'm not yet paying attention to)
1556 unit_characteristics
= kv
->value
.immediate
;
1557 SBP2_DEBUG("sbp2_unit_characteristics = %x",
1558 (unsigned int) unit_characteristics
);
1561 case SBP2_FIRMWARE_REVISION_KEY
:
1562 /* Firmware revision */
1563 firmware_revision
= kv
->value
.immediate
;
1564 if (force_inquiry_hack
)
1565 SBP2_INFO("sbp2_firmware_revision = %x",
1566 (unsigned int) firmware_revision
);
1567 else SBP2_DEBUG("sbp2_firmware_revision = %x",
1568 (unsigned int) firmware_revision
);
1576 /* This is the start of our broken device checking. We try to hack
1577 * around oddities and known defects. */
1580 /* If the vendor id is 0xa0b8 (Symbios vendor id), then we have a
1581 * bridge with 128KB max transfer size limitation. For sanity, we
1582 * only voice this when the current max_sectors setting
1583 * exceeds the 128k limit. By default, that is not the case.
1585 * It would be really nice if we could detect this before the scsi
1586 * host gets initialized. That way we can down-force the
1587 * max_sectors to account for it. That is not currently
1589 if ((firmware_revision
& 0xffff00) ==
1590 SBP2_128KB_BROKEN_FIRMWARE
&&
1591 (max_sectors
* 512) > (128*1024)) {
1592 SBP2_WARN("Node " NODE_BUS_FMT
": Bridge only supports 128KB max transfer size.",
1593 NODE_BUS_ARGS(ud
->ne
->host
, ud
->ne
->nodeid
));
1594 SBP2_WARN("WARNING: Current max_sectors setting is larger than 128KB (%d sectors)!",
1596 workarounds
|= SBP2_BREAKAGE_128K_MAX_TRANSFER
;
1599 /* Check for a blacklisted set of devices that require us to force
1600 * a 36 byte host inquiry. This can be overriden as a module param
1601 * (to force all hosts). */
1602 for (i
= 0; i
< NUM_BROKEN_INQUIRY_DEVS
; i
++) {
1603 if ((firmware_revision
& 0xffff00) ==
1604 sbp2_broken_inquiry_list
[i
]) {
1605 SBP2_WARN("Node " NODE_BUS_FMT
": Using 36byte inquiry workaround",
1606 NODE_BUS_ARGS(ud
->ne
->host
, ud
->ne
->nodeid
));
1607 workarounds
|= SBP2_BREAKAGE_INQUIRY_HACK
;
1608 break; /* No need to continue. */
1612 /* If this is a logical unit directory entry, process the parent
1613 * to get the values. */
1614 if (ud
->flags
& UNIT_DIRECTORY_LUN_DIRECTORY
) {
1615 struct unit_directory
*parent_ud
=
1616 container_of(ud
->device
.parent
, struct unit_directory
, device
);
1617 sbp2_parse_unit_directory(scsi_id
, parent_ud
);
1619 scsi_id
->sbp2_management_agent_addr
= management_agent_addr
;
1620 scsi_id
->sbp2_command_set_spec_id
= command_set_spec_id
;
1621 scsi_id
->sbp2_command_set
= command_set
;
1622 scsi_id
->sbp2_unit_characteristics
= unit_characteristics
;
1623 scsi_id
->sbp2_firmware_revision
= firmware_revision
;
1624 scsi_id
->workarounds
= workarounds
;
1625 if (ud
->flags
& UNIT_DIRECTORY_HAS_LUN
)
1626 scsi_id
->sbp2_device_type_and_lun
= ud
->lun
;
1631 * This function is called in order to determine the max speed and packet
1632 * size we can use in our ORBs. Note, that we (the driver and host) only
1633 * initiate the transaction. The SBP-2 device actually transfers the data
1634 * (by reading from the DMA area we tell it). This means that the SBP-2
1635 * device decides the actual maximum data it can transfer. We just tell it
1636 * the speed that it needs to use, and the max_rec the host supports, and
1637 * it takes care of the rest.
1639 static int sbp2_max_speed_and_size(struct scsi_id_instance_data
*scsi_id
)
1641 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1643 SBP2_DEBUG("sbp2_max_speed_and_size");
1645 /* Initial setting comes from the hosts speed map */
1646 scsi_id
->speed_code
= hi
->host
->speed_map
[NODEID_TO_NODE(hi
->host
->node_id
) * 64
1647 + NODEID_TO_NODE(scsi_id
->ne
->nodeid
)];
1649 /* Bump down our speed if the user requested it */
1650 if (scsi_id
->speed_code
> max_speed
) {
1651 scsi_id
->speed_code
= max_speed
;
1652 SBP2_ERR("Forcing SBP-2 max speed down to %s",
1653 hpsb_speedto_str
[scsi_id
->speed_code
]);
1656 /* Payload size is the lesser of what our speed supports and what
1657 * our host supports. */
1658 scsi_id
->max_payload_size
= min(sbp2_speedto_max_payload
[scsi_id
->speed_code
],
1659 (u8
)(hi
->host
->csr
.max_rec
- 1));
1661 HPSB_DEBUG("Node " NODE_BUS_FMT
": Max speed [%s] - Max payload [%u]",
1662 NODE_BUS_ARGS(hi
->host
, scsi_id
->ne
->nodeid
),
1663 hpsb_speedto_str
[scsi_id
->speed_code
],
1664 1 << ((u32
)scsi_id
->max_payload_size
+ 2));
1670 * This function is called in order to perform a SBP-2 agent reset.
1672 static int sbp2_agent_reset(struct scsi_id_instance_data
*scsi_id
, int wait
)
1678 SBP2_DEBUG("sbp2_agent_reset");
1681 * Ok, let's write to the target's management agent register
1683 data
= ntohl(SBP2_AGENT_RESET_DATA
);
1684 addr
= scsi_id
->sbp2_command_block_agent_addr
+ SBP2_AGENT_RESET_OFFSET
;
1687 retval
= hpsb_node_write(scsi_id
->ne
, addr
, &data
, 4);
1689 retval
= sbp2util_node_write_no_wait(scsi_id
->ne
, addr
, &data
, 4);
1692 SBP2_ERR("hpsb_node_write failed.\n");
1697 * Need to make sure orb pointer is written on next command
1699 scsi_id
->last_orb
= NULL
;
1705 * This function is called to create the actual command orb and s/g list
1706 * out of the scsi command itself.
1708 static int sbp2_create_command_orb(struct scsi_id_instance_data
*scsi_id
,
1709 struct sbp2_command_info
*command
,
1711 unsigned int scsi_use_sg
,
1712 unsigned int scsi_request_bufflen
,
1713 void *scsi_request_buffer
,
1714 enum dma_data_direction dma_dir
)
1717 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1718 struct scatterlist
*sgpnt
= (struct scatterlist
*) scsi_request_buffer
;
1719 struct sbp2_command_orb
*command_orb
= &command
->command_orb
;
1720 struct sbp2_unrestricted_page_table
*scatter_gather_element
=
1721 &command
->scatter_gather_element
[0];
1722 u32 sg_count
, sg_len
, orb_direction
;
1727 * Set-up our command ORB..
1729 * NOTE: We're doing unrestricted page tables (s/g), as this is
1730 * best performance (at least with the devices I have). This means
1731 * that data_size becomes the number of s/g elements, and
1732 * page_size should be zero (for unrestricted).
1734 command_orb
->next_ORB_hi
= ORB_SET_NULL_PTR(1);
1735 command_orb
->next_ORB_lo
= 0x0;
1736 command_orb
->misc
= ORB_SET_MAX_PAYLOAD(scsi_id
->max_payload_size
);
1737 command_orb
->misc
|= ORB_SET_SPEED(scsi_id
->speed_code
);
1738 command_orb
->misc
|= ORB_SET_NOTIFY(1); /* Notify us when complete */
1741 * Get the direction of the transfer. If the direction is unknown, then use our
1742 * goofy table as a back-up.
1746 orb_direction
= ORB_DIRECTION_NO_DATA_TRANSFER
;
1749 orb_direction
= ORB_DIRECTION_WRITE_TO_MEDIA
;
1751 case DMA_FROM_DEVICE
:
1752 orb_direction
= ORB_DIRECTION_READ_FROM_MEDIA
;
1754 case DMA_BIDIRECTIONAL
:
1756 SBP2_ERR("SCSI data transfer direction not specified. "
1757 "Update the SBP2 direction table in sbp2.h if "
1758 "necessary for your application");
1759 __scsi_print_command(scsi_cmd
);
1760 orb_direction
= sbp2scsi_direction_table
[*scsi_cmd
];
1765 * Set-up our pagetable stuff... unfortunately, this has become
1766 * messier than I'd like. Need to clean this up a bit. ;-)
1768 if (orb_direction
== ORB_DIRECTION_NO_DATA_TRANSFER
) {
1770 SBP2_DEBUG("No data transfer");
1773 * Handle no data transfer
1775 command_orb
->data_descriptor_hi
= 0x0;
1776 command_orb
->data_descriptor_lo
= 0x0;
1777 command_orb
->misc
|= ORB_SET_DIRECTION(1);
1779 } else if (scsi_use_sg
) {
1781 SBP2_DEBUG("Use scatter/gather");
1784 * Special case if only one element (and less than 64KB in size)
1786 if ((scsi_use_sg
== 1) && (sgpnt
[0].length
<= SBP2_MAX_SG_ELEMENT_LENGTH
)) {
1788 SBP2_DEBUG("Only one s/g element");
1789 command
->dma_dir
= dma_dir
;
1790 command
->dma_size
= sgpnt
[0].length
;
1791 command
->dma_type
= CMD_DMA_PAGE
;
1792 command
->cmd_dma
= pci_map_page(hi
->host
->pdev
,
1797 SBP2_DMA_ALLOC("single page scatter element");
1799 command_orb
->data_descriptor_hi
= ORB_SET_NODE_ID(hi
->host
->node_id
);
1800 command_orb
->data_descriptor_lo
= command
->cmd_dma
;
1801 command_orb
->misc
|= ORB_SET_DATA_SIZE(command
->dma_size
);
1802 command_orb
->misc
|= ORB_SET_DIRECTION(orb_direction
);
1805 int count
= pci_map_sg(hi
->host
->pdev
, sgpnt
, scsi_use_sg
, dma_dir
);
1806 SBP2_DMA_ALLOC("scatter list");
1808 command
->dma_size
= scsi_use_sg
;
1809 command
->dma_dir
= dma_dir
;
1810 command
->sge_buffer
= sgpnt
;
1812 /* use page tables (s/g) */
1813 command_orb
->misc
|= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1814 command_orb
->misc
|= ORB_SET_DIRECTION(orb_direction
);
1815 command_orb
->data_descriptor_hi
= ORB_SET_NODE_ID(hi
->host
->node_id
);
1816 command_orb
->data_descriptor_lo
= command
->sge_dma
;
1819 * Loop through and fill out our sbp-2 page tables
1820 * (and split up anything too large)
1822 for (i
= 0, sg_count
= 0 ; i
< count
; i
++, sgpnt
++) {
1823 sg_len
= sg_dma_len(sgpnt
);
1824 sg_addr
= sg_dma_address(sgpnt
);
1826 scatter_gather_element
[sg_count
].segment_base_lo
= sg_addr
;
1827 if (sg_len
> SBP2_MAX_SG_ELEMENT_LENGTH
) {
1828 scatter_gather_element
[sg_count
].length_segment_base_hi
=
1829 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH
);
1830 sg_addr
+= SBP2_MAX_SG_ELEMENT_LENGTH
;
1831 sg_len
-= SBP2_MAX_SG_ELEMENT_LENGTH
;
1833 scatter_gather_element
[sg_count
].length_segment_base_hi
=
1834 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len
);
1841 /* Number of page table (s/g) elements */
1842 command_orb
->misc
|= ORB_SET_DATA_SIZE(sg_count
);
1844 sbp2util_packet_dump(scatter_gather_element
,
1845 (sizeof(struct sbp2_unrestricted_page_table
)) * sg_count
,
1846 "sbp2 s/g list", command
->sge_dma
);
1849 * Byte swap page tables if necessary
1851 sbp2util_cpu_to_be32_buffer(scatter_gather_element
,
1852 (sizeof(struct sbp2_unrestricted_page_table
)) *
1859 SBP2_DEBUG("No scatter/gather");
1861 command
->dma_dir
= dma_dir
;
1862 command
->dma_size
= scsi_request_bufflen
;
1863 command
->dma_type
= CMD_DMA_SINGLE
;
1864 command
->cmd_dma
= pci_map_single (hi
->host
->pdev
, scsi_request_buffer
,
1867 SBP2_DMA_ALLOC("single bulk");
1870 * Handle case where we get a command w/o s/g enabled (but
1871 * check for transfers larger than 64K)
1873 if (scsi_request_bufflen
<= SBP2_MAX_SG_ELEMENT_LENGTH
) {
1875 command_orb
->data_descriptor_hi
= ORB_SET_NODE_ID(hi
->host
->node_id
);
1876 command_orb
->data_descriptor_lo
= command
->cmd_dma
;
1877 command_orb
->misc
|= ORB_SET_DATA_SIZE(scsi_request_bufflen
);
1878 command_orb
->misc
|= ORB_SET_DIRECTION(orb_direction
);
1881 * Sanity, in case our direction table is not
1884 if (!scsi_request_bufflen
) {
1885 command_orb
->data_descriptor_hi
= 0x0;
1886 command_orb
->data_descriptor_lo
= 0x0;
1887 command_orb
->misc
|= ORB_SET_DIRECTION(1);
1892 * Need to turn this into page tables, since the
1893 * buffer is too large.
1895 command_orb
->data_descriptor_hi
= ORB_SET_NODE_ID(hi
->host
->node_id
);
1896 command_orb
->data_descriptor_lo
= command
->sge_dma
;
1898 /* Use page tables (s/g) */
1899 command_orb
->misc
|= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1900 command_orb
->misc
|= ORB_SET_DIRECTION(orb_direction
);
1903 * fill out our sbp-2 page tables (and split up
1907 sg_len
= scsi_request_bufflen
;
1908 sg_addr
= command
->cmd_dma
;
1910 scatter_gather_element
[sg_count
].segment_base_lo
= sg_addr
;
1911 if (sg_len
> SBP2_MAX_SG_ELEMENT_LENGTH
) {
1912 scatter_gather_element
[sg_count
].length_segment_base_hi
=
1913 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH
);
1914 sg_addr
+= SBP2_MAX_SG_ELEMENT_LENGTH
;
1915 sg_len
-= SBP2_MAX_SG_ELEMENT_LENGTH
;
1917 scatter_gather_element
[sg_count
].length_segment_base_hi
=
1918 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len
);
1924 /* Number of page table (s/g) elements */
1925 command_orb
->misc
|= ORB_SET_DATA_SIZE(sg_count
);
1927 sbp2util_packet_dump(scatter_gather_element
,
1928 (sizeof(struct sbp2_unrestricted_page_table
)) * sg_count
,
1929 "sbp2 s/g list", command
->sge_dma
);
1932 * Byte swap page tables if necessary
1934 sbp2util_cpu_to_be32_buffer(scatter_gather_element
,
1935 (sizeof(struct sbp2_unrestricted_page_table
)) *
1943 * Byte swap command ORB if necessary
1945 sbp2util_cpu_to_be32_buffer(command_orb
, sizeof(struct sbp2_command_orb
));
1948 * Put our scsi command in the command ORB
1950 memset(command_orb
->cdb
, 0, 12);
1951 memcpy(command_orb
->cdb
, scsi_cmd
, COMMAND_SIZE(*scsi_cmd
));
1957 * This function is called in order to begin a regular SBP-2 command.
1959 static int sbp2_link_orb_command(struct scsi_id_instance_data
*scsi_id
,
1960 struct sbp2_command_info
*command
)
1962 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1963 struct sbp2_command_orb
*command_orb
= &command
->command_orb
;
1964 struct node_entry
*ne
= scsi_id
->ne
;
1967 outstanding_orb_incr
;
1968 SBP2_ORB_DEBUG("sending command orb %p, total orbs = %x",
1969 command_orb
, global_outstanding_command_orbs
);
1971 pci_dma_sync_single_for_device(hi
->host
->pdev
, command
->command_orb_dma
,
1972 sizeof(struct sbp2_command_orb
),
1973 PCI_DMA_BIDIRECTIONAL
);
1974 pci_dma_sync_single_for_device(hi
->host
->pdev
, command
->sge_dma
,
1975 sizeof(command
->scatter_gather_element
),
1976 PCI_DMA_BIDIRECTIONAL
);
1978 * Check to see if there are any previous orbs to use
1980 if (scsi_id
->last_orb
== NULL
) {
1984 * Ok, let's write to the target's management agent register
1986 addr
= scsi_id
->sbp2_command_block_agent_addr
+ SBP2_ORB_POINTER_OFFSET
;
1987 data
[0] = ORB_SET_NODE_ID(hi
->host
->node_id
);
1988 data
[1] = command
->command_orb_dma
;
1989 sbp2util_cpu_to_be32_buffer(data
, 8);
1991 SBP2_ORB_DEBUG("write command agent, command orb %p", command_orb
);
1993 if (sbp2util_node_write_no_wait(ne
, addr
, data
, 8) < 0) {
1994 SBP2_ERR("sbp2util_node_write_no_wait failed.\n");
1998 SBP2_ORB_DEBUG("write command agent complete");
2000 scsi_id
->last_orb
= command_orb
;
2001 scsi_id
->last_orb_dma
= command
->command_orb_dma
;
2007 * We have an orb already sent (maybe or maybe not
2008 * processed) that we can append this orb to. So do so,
2009 * and ring the doorbell. Have to be very careful
2010 * modifying these next orb pointers, as they are accessed
2011 * both by the sbp2 device and us.
2013 scsi_id
->last_orb
->next_ORB_lo
=
2014 cpu_to_be32(command
->command_orb_dma
);
2015 /* Tells hardware that this pointer is valid */
2016 scsi_id
->last_orb
->next_ORB_hi
= 0x0;
2017 pci_dma_sync_single_for_device(hi
->host
->pdev
, scsi_id
->last_orb_dma
,
2018 sizeof(struct sbp2_command_orb
),
2019 PCI_DMA_BIDIRECTIONAL
);
2024 data
= cpu_to_be32(command
->command_orb_dma
);
2025 addr
= scsi_id
->sbp2_command_block_agent_addr
+ SBP2_DOORBELL_OFFSET
;
2027 SBP2_ORB_DEBUG("ring doorbell, command orb %p", command_orb
);
2029 if (sbp2util_node_write_no_wait(ne
, addr
, &data
, 4) < 0) {
2030 SBP2_ERR("sbp2util_node_write_no_wait failed");
2034 scsi_id
->last_orb
= command_orb
;
2035 scsi_id
->last_orb_dma
= command
->command_orb_dma
;
2042 * This function is called in order to begin a regular SBP-2 command.
2044 static int sbp2_send_command(struct scsi_id_instance_data
*scsi_id
,
2045 struct scsi_cmnd
*SCpnt
,
2046 void (*done
)(struct scsi_cmnd
*))
2048 unchar
*cmd
= (unchar
*) SCpnt
->cmnd
;
2049 unsigned int request_bufflen
= SCpnt
->request_bufflen
;
2050 struct sbp2_command_info
*command
;
2052 SBP2_DEBUG("sbp2_send_command");
2053 #if (CONFIG_IEEE1394_SBP2_DEBUG >= 2) || defined(CONFIG_IEEE1394_SBP2_PACKET_DUMP)
2054 printk("[scsi command]\n ");
2055 scsi_print_command(SCpnt
);
2057 SBP2_DEBUG("SCSI transfer size = %x", request_bufflen
);
2058 SBP2_DEBUG("SCSI s/g elements = %x", (unsigned int)SCpnt
->use_sg
);
2061 * Allocate a command orb and s/g structure
2063 command
= sbp2util_allocate_command_orb(scsi_id
, SCpnt
, done
);
2069 * The scsi stack sends down a request_bufflen which does not match the
2070 * length field in the scsi cdb. This causes some sbp2 devices to
2071 * reject this inquiry command. Fix the request_bufflen.
2073 if (*cmd
== INQUIRY
) {
2074 if (force_inquiry_hack
|| scsi_id
->workarounds
& SBP2_BREAKAGE_INQUIRY_HACK
)
2075 request_bufflen
= cmd
[4] = 0x24;
2077 request_bufflen
= cmd
[4];
2081 * Now actually fill in the comamnd orb and sbp2 s/g list
2083 sbp2_create_command_orb(scsi_id
, command
, cmd
, SCpnt
->use_sg
,
2084 request_bufflen
, SCpnt
->request_buffer
,
2085 SCpnt
->sc_data_direction
);
2087 * Update our cdb if necessary (to handle sbp2 RBC command set
2088 * differences). This is where the command set hacks go! =)
2090 sbp2_check_sbp2_command(scsi_id
, command
->command_orb
.cdb
);
2092 sbp2util_packet_dump(&command
->command_orb
, sizeof(struct sbp2_command_orb
),
2093 "sbp2 command orb", command
->command_orb_dma
);
2096 * Initialize status fifo
2098 memset(&scsi_id
->status_block
, 0, sizeof(struct sbp2_status_block
));
2101 * Link up the orb, and ring the doorbell if needed
2103 sbp2_link_orb_command(scsi_id
, command
);
2110 * This function deals with command set differences between Linux scsi
2111 * command set and sbp2 RBC command set.
2113 static void sbp2_check_sbp2_command(struct scsi_id_instance_data
*scsi_id
, unchar
*cmd
)
2116 u8 device_type
= SBP2_DEVICE_TYPE (scsi_id
->sbp2_device_type_and_lun
);
2118 SBP2_DEBUG("sbp2_check_sbp2_command");
2124 if (sbp2_command_conversion_device_type(device_type
)) {
2126 SBP2_DEBUG("Convert READ_6 to READ_10");
2129 * Need to turn read_6 into read_10
2132 new_cmd
[1] = (cmd
[1] & 0xe0);
2134 new_cmd
[3] = (cmd
[1] & 0x1f);
2135 new_cmd
[4] = cmd
[2];
2136 new_cmd
[5] = cmd
[3];
2139 new_cmd
[8] = cmd
[4];
2140 new_cmd
[9] = cmd
[5];
2142 memcpy(cmd
, new_cmd
, 10);
2150 if (sbp2_command_conversion_device_type(device_type
)) {
2152 SBP2_DEBUG("Convert WRITE_6 to WRITE_10");
2155 * Need to turn write_6 into write_10
2158 new_cmd
[1] = (cmd
[1] & 0xe0);
2160 new_cmd
[3] = (cmd
[1] & 0x1f);
2161 new_cmd
[4] = cmd
[2];
2162 new_cmd
[5] = cmd
[3];
2165 new_cmd
[8] = cmd
[4];
2166 new_cmd
[9] = cmd
[5];
2168 memcpy(cmd
, new_cmd
, 10);
2176 if (sbp2_command_conversion_device_type(device_type
)) {
2178 SBP2_DEBUG("Convert MODE_SENSE_6 to MODE_SENSE_10");
2181 * Need to turn mode_sense_6 into mode_sense_10
2184 new_cmd
[1] = cmd
[1];
2185 new_cmd
[2] = cmd
[2];
2191 new_cmd
[8] = cmd
[4];
2192 new_cmd
[9] = cmd
[5];
2194 memcpy(cmd
, new_cmd
, 10);
2203 * TODO. Probably need to change mode select to 10 byte version
2214 * Translates SBP-2 status into SCSI sense data for check conditions
2216 static unsigned int sbp2_status_to_sense_data(unchar
*sbp2_status
, unchar
*sense_data
)
2218 SBP2_DEBUG("sbp2_status_to_sense_data");
2221 * Ok, it's pretty ugly... ;-)
2223 sense_data
[0] = 0x70;
2224 sense_data
[1] = 0x0;
2225 sense_data
[2] = sbp2_status
[9];
2226 sense_data
[3] = sbp2_status
[12];
2227 sense_data
[4] = sbp2_status
[13];
2228 sense_data
[5] = sbp2_status
[14];
2229 sense_data
[6] = sbp2_status
[15];
2231 sense_data
[8] = sbp2_status
[16];
2232 sense_data
[9] = sbp2_status
[17];
2233 sense_data
[10] = sbp2_status
[18];
2234 sense_data
[11] = sbp2_status
[19];
2235 sense_data
[12] = sbp2_status
[10];
2236 sense_data
[13] = sbp2_status
[11];
2237 sense_data
[14] = sbp2_status
[20];
2238 sense_data
[15] = sbp2_status
[21];
2240 return(sbp2_status
[8] & 0x3f); /* return scsi status */
2244 * This function is called after a command is completed, in order to do any necessary SBP-2
2245 * response data translations for the SCSI stack
2247 static void sbp2_check_sbp2_response(struct scsi_id_instance_data
*scsi_id
,
2248 struct scsi_cmnd
*SCpnt
)
2250 u8
*scsi_buf
= SCpnt
->request_buffer
;
2251 u8 device_type
= SBP2_DEVICE_TYPE (scsi_id
->sbp2_device_type_and_lun
);
2253 SBP2_DEBUG("sbp2_check_sbp2_response");
2255 switch (SCpnt
->cmnd
[0]) {
2260 * If scsi_id->sbp2_device_type_and_lun is uninitialized, then fill
2261 * this information in from the inquiry response data. Lun is set to zero.
2263 if (scsi_id
->sbp2_device_type_and_lun
== SBP2_DEVICE_TYPE_LUN_UNINITIALIZED
) {
2264 SBP2_DEBUG("Creating sbp2_device_type_and_lun from scsi inquiry data");
2265 scsi_id
->sbp2_device_type_and_lun
= (scsi_buf
[0] & 0x1f) << 16;
2269 * Make sure data length is ok. Minimum length is 36 bytes
2271 if (scsi_buf
[4] == 0) {
2272 scsi_buf
[4] = 36 - 5;
2276 * Check for Simple Direct Access Device and change it to TYPE_DISK
2278 if ((scsi_buf
[0] & 0x1f) == TYPE_RBC
) {
2279 SBP2_DEBUG("Changing TYPE_RBC to TYPE_DISK");
2280 scsi_buf
[0] &= 0xe0;
2284 * Fix ansi revision and response data format
2287 scsi_buf
[3] = (scsi_buf
[3] & 0xf0) | 2;
2293 if (sbp2_command_conversion_device_type(device_type
)) {
2295 SBP2_DEBUG("Modify mode sense response (10 byte version)");
2297 scsi_buf
[0] = scsi_buf
[1]; /* Mode data length */
2298 scsi_buf
[1] = scsi_buf
[2]; /* Medium type */
2299 scsi_buf
[2] = scsi_buf
[3]; /* Device specific parameter */
2300 scsi_buf
[3] = scsi_buf
[7]; /* Block descriptor length */
2301 memcpy(scsi_buf
+ 4, scsi_buf
+ 8, scsi_buf
[0]);
2309 * TODO. Probably need to change mode select to 10 byte version
2319 * This function deals with status writes from the SBP-2 device
2321 static int sbp2_handle_status_write(struct hpsb_host
*host
, int nodeid
, int destid
,
2322 quadlet_t
*data
, u64 addr
, size_t length
, u16 fl
)
2324 struct sbp2scsi_host_info
*hi
;
2325 struct scsi_id_instance_data
*scsi_id
= NULL
, *scsi_id_tmp
;
2327 struct scsi_cmnd
*SCpnt
= NULL
;
2328 u32 scsi_status
= SBP2_SCSI_STATUS_GOOD
;
2329 struct sbp2_command_info
*command
;
2331 SBP2_DEBUG("sbp2_handle_status_write");
2333 sbp2util_packet_dump(data
, length
, "sbp2 status write by device", (u32
)addr
);
2336 SBP2_ERR("host is NULL - this is bad!");
2337 return(RCODE_ADDRESS_ERROR
);
2340 hi
= hpsb_get_hostinfo(&sbp2_highlevel
, host
);
2343 SBP2_ERR("host info is NULL - this is bad!");
2344 return(RCODE_ADDRESS_ERROR
);
2348 * Find our scsi_id structure by looking at the status fifo address written to by
2351 id
= SBP2_STATUS_FIFO_OFFSET_TO_ENTRY((u32
)(addr
- SBP2_STATUS_FIFO_ADDRESS
));
2352 list_for_each_entry(scsi_id_tmp
, &hi
->scsi_ids
, scsi_list
) {
2353 if (scsi_id_tmp
->ne
->nodeid
== nodeid
&& scsi_id_tmp
->ud
->id
== id
) {
2354 scsi_id
= scsi_id_tmp
;
2360 SBP2_ERR("scsi_id is NULL - device is gone?");
2361 return(RCODE_ADDRESS_ERROR
);
2365 * Put response into scsi_id status fifo...
2367 memcpy(&scsi_id
->status_block
, data
, length
);
2370 * Byte swap first two quadlets (8 bytes) of status for processing
2372 sbp2util_be32_to_cpu_buffer(&scsi_id
->status_block
, 8);
2375 * Handle command ORB status here if necessary. First, need to match status with command.
2377 command
= sbp2util_find_command_for_orb(scsi_id
, scsi_id
->status_block
.ORB_offset_lo
);
2380 SBP2_DEBUG("Found status for command ORB");
2381 pci_dma_sync_single_for_cpu(hi
->host
->pdev
, command
->command_orb_dma
,
2382 sizeof(struct sbp2_command_orb
),
2383 PCI_DMA_BIDIRECTIONAL
);
2384 pci_dma_sync_single_for_cpu(hi
->host
->pdev
, command
->sge_dma
,
2385 sizeof(command
->scatter_gather_element
),
2386 PCI_DMA_BIDIRECTIONAL
);
2388 SBP2_ORB_DEBUG("matched command orb %p", &command
->command_orb
);
2389 outstanding_orb_decr
;
2392 * Matched status with command, now grab scsi command pointers and check status
2394 SCpnt
= command
->Current_SCpnt
;
2395 sbp2util_mark_command_completed(scsi_id
, command
);
2400 * See if the target stored any scsi status information
2402 if (STATUS_GET_LENGTH(scsi_id
->status_block
.ORB_offset_hi_misc
) > 1) {
2404 * Translate SBP-2 status to SCSI sense data
2406 SBP2_DEBUG("CHECK CONDITION");
2407 scsi_status
= sbp2_status_to_sense_data((unchar
*)&scsi_id
->status_block
, SCpnt
->sense_buffer
);
2411 * Check to see if the dead bit is set. If so, we'll have to initiate
2412 * a fetch agent reset.
2414 if (STATUS_GET_DEAD_BIT(scsi_id
->status_block
.ORB_offset_hi_misc
)) {
2417 * Initiate a fetch agent reset.
2419 SBP2_DEBUG("Dead bit set - initiating fetch agent reset");
2420 sbp2_agent_reset(scsi_id
, 0);
2423 SBP2_ORB_DEBUG("completing command orb %p", &command
->command_orb
);
2427 * Check here to see if there are no commands in-use. If there are none, we can
2428 * null out last orb so that next time around we write directly to the orb pointer...
2429 * Quick start saves one 1394 bus transaction.
2431 if (list_empty(&scsi_id
->sbp2_command_orb_inuse
)) {
2432 scsi_id
->last_orb
= NULL
;
2438 * It's probably a login/logout/reconnect status.
2440 if ((scsi_id
->login_orb_dma
== scsi_id
->status_block
.ORB_offset_lo
) ||
2441 (scsi_id
->query_logins_orb_dma
== scsi_id
->status_block
.ORB_offset_lo
) ||
2442 (scsi_id
->reconnect_orb_dma
== scsi_id
->status_block
.ORB_offset_lo
) ||
2443 (scsi_id
->logout_orb_dma
== scsi_id
->status_block
.ORB_offset_lo
)) {
2444 atomic_set(&scsi_id
->sbp2_login_complete
, 1);
2450 /* Complete the SCSI command. */
2451 SBP2_DEBUG("Completing SCSI command");
2452 sbp2scsi_complete_command(scsi_id
, scsi_status
, SCpnt
,
2453 command
->Current_done
);
2454 SBP2_ORB_DEBUG("command orb completed");
2457 return(RCODE_COMPLETE
);
2461 /**************************************
2462 * SCSI interface related section
2463 **************************************/
2466 * This routine is the main request entry routine for doing I/O. It is
2467 * called from the scsi stack directly.
2469 static int sbp2scsi_queuecommand(struct scsi_cmnd
*SCpnt
,
2470 void (*done
)(struct scsi_cmnd
*))
2472 struct scsi_id_instance_data
*scsi_id
=
2473 (struct scsi_id_instance_data
*)SCpnt
->device
->host
->hostdata
[0];
2474 struct sbp2scsi_host_info
*hi
;
2476 SBP2_DEBUG("sbp2scsi_queuecommand");
2479 * If scsi_id is null, it means there is no device in this slot,
2480 * so we should return selection timeout.
2483 SCpnt
->result
= DID_NO_CONNECT
<< 16;
2491 SBP2_ERR("sbp2scsi_host_info is NULL - this is bad!");
2492 SCpnt
->result
= DID_NO_CONNECT
<< 16;
2498 * Until we handle multiple luns, just return selection time-out
2499 * to any IO directed at non-zero LUNs
2501 if (SCpnt
->device
->lun
) {
2502 SCpnt
->result
= DID_NO_CONNECT
<< 16;
2508 * Check for request sense command, and handle it here
2509 * (autorequest sense)
2511 if (SCpnt
->cmnd
[0] == REQUEST_SENSE
) {
2512 SBP2_DEBUG("REQUEST_SENSE");
2513 memcpy(SCpnt
->request_buffer
, SCpnt
->sense_buffer
, SCpnt
->request_bufflen
);
2514 memset(SCpnt
->sense_buffer
, 0, sizeof(SCpnt
->sense_buffer
));
2515 sbp2scsi_complete_command(scsi_id
, SBP2_SCSI_STATUS_GOOD
, SCpnt
, done
);
2520 * Check to see if we are in the middle of a bus reset.
2522 if (!hpsb_node_entry_valid(scsi_id
->ne
)) {
2523 SBP2_ERR("Bus reset in progress - rejecting command");
2524 SCpnt
->result
= DID_BUS_BUSY
<< 16;
2530 * Try and send our SCSI command
2532 if (sbp2_send_command(scsi_id
, SCpnt
, done
)) {
2533 SBP2_ERR("Error sending SCSI command");
2534 sbp2scsi_complete_command(scsi_id
, SBP2_SCSI_STATUS_SELECTION_TIMEOUT
,
2542 * This function is called in order to complete all outstanding SBP-2
2543 * commands (in case of resets, etc.).
2545 static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data
*scsi_id
,
2548 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
2549 struct list_head
*lh
;
2550 struct sbp2_command_info
*command
;
2552 SBP2_DEBUG("sbp2scsi_complete_all_commands");
2554 while (!list_empty(&scsi_id
->sbp2_command_orb_inuse
)) {
2555 SBP2_DEBUG("Found pending command to complete");
2556 lh
= scsi_id
->sbp2_command_orb_inuse
.next
;
2557 command
= list_entry(lh
, struct sbp2_command_info
, list
);
2558 pci_dma_sync_single_for_cpu(hi
->host
->pdev
, command
->command_orb_dma
,
2559 sizeof(struct sbp2_command_orb
),
2560 PCI_DMA_BIDIRECTIONAL
);
2561 pci_dma_sync_single_for_cpu(hi
->host
->pdev
, command
->sge_dma
,
2562 sizeof(command
->scatter_gather_element
),
2563 PCI_DMA_BIDIRECTIONAL
);
2564 sbp2util_mark_command_completed(scsi_id
, command
);
2565 if (command
->Current_SCpnt
) {
2566 command
->Current_SCpnt
->result
= status
<< 16;
2567 command
->Current_done(command
->Current_SCpnt
);
2575 * This function is called in order to complete a regular SBP-2 command.
2577 * This can be called in interrupt context.
2579 static void sbp2scsi_complete_command(struct scsi_id_instance_data
*scsi_id
,
2580 u32 scsi_status
, struct scsi_cmnd
*SCpnt
,
2581 void (*done
)(struct scsi_cmnd
*))
2583 SBP2_DEBUG("sbp2scsi_complete_command");
2589 SBP2_ERR("SCpnt is NULL");
2594 * If a bus reset is in progress and there was an error, don't
2595 * complete the command, just let it get retried at the end of the
2598 if (!hpsb_node_entry_valid(scsi_id
->ne
) && (scsi_status
!= SBP2_SCSI_STATUS_GOOD
)) {
2599 SBP2_ERR("Bus reset in progress - retry command later");
2604 * Switch on scsi status
2606 switch (scsi_status
) {
2607 case SBP2_SCSI_STATUS_GOOD
:
2608 SCpnt
->result
= DID_OK
;
2611 case SBP2_SCSI_STATUS_BUSY
:
2612 SBP2_ERR("SBP2_SCSI_STATUS_BUSY");
2613 SCpnt
->result
= DID_BUS_BUSY
<< 16;
2616 case SBP2_SCSI_STATUS_CHECK_CONDITION
:
2617 SBP2_DEBUG("SBP2_SCSI_STATUS_CHECK_CONDITION");
2618 SCpnt
->result
= CHECK_CONDITION
<< 1;
2623 #if CONFIG_IEEE1394_SBP2_DEBUG >= 1
2624 scsi_print_command(SCpnt
);
2625 scsi_print_sense("bh", SCpnt
);
2630 case SBP2_SCSI_STATUS_SELECTION_TIMEOUT
:
2631 SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT");
2632 SCpnt
->result
= DID_NO_CONNECT
<< 16;
2633 scsi_print_command(SCpnt
);
2636 case SBP2_SCSI_STATUS_CONDITION_MET
:
2637 case SBP2_SCSI_STATUS_RESERVATION_CONFLICT
:
2638 case SBP2_SCSI_STATUS_COMMAND_TERMINATED
:
2639 SBP2_ERR("Bad SCSI status = %x", scsi_status
);
2640 SCpnt
->result
= DID_ERROR
<< 16;
2641 scsi_print_command(SCpnt
);
2645 SBP2_ERR("Unsupported SCSI status = %x", scsi_status
);
2646 SCpnt
->result
= DID_ERROR
<< 16;
2650 * Take care of any sbp2 response data mucking here (RBC stuff, etc.)
2652 if (SCpnt
->result
== DID_OK
) {
2653 sbp2_check_sbp2_response(scsi_id
, SCpnt
);
2657 * If a bus reset is in progress and there was an error, complete
2658 * the command as busy so that it will get retried.
2660 if (!hpsb_node_entry_valid(scsi_id
->ne
) && (scsi_status
!= SBP2_SCSI_STATUS_GOOD
)) {
2661 SBP2_ERR("Completing command with busy (bus reset)");
2662 SCpnt
->result
= DID_BUS_BUSY
<< 16;
2666 * If a unit attention occurs, return busy status so it gets
2667 * retried... it could have happened because of a 1394 bus reset
2671 if ((scsi_status
== SBP2_SCSI_STATUS_CHECK_CONDITION
) &&
2672 (SCpnt
->sense_buffer
[2] == UNIT_ATTENTION
)) {
2673 SBP2_DEBUG("UNIT ATTENTION - return busy");
2674 SCpnt
->result
= DID_BUS_BUSY
<< 16;
2679 * Tell scsi stack that we're done with this command
2685 static int sbp2scsi_slave_configure (struct scsi_device
*sdev
)
2687 blk_queue_dma_alignment(sdev
->request_queue
, (512 - 1));
2694 * Called by scsi stack when something has really gone wrong. Usually
2695 * called when a command has timed-out for some reason.
2697 static int sbp2scsi_abort(struct scsi_cmnd
*SCpnt
)
2699 struct scsi_id_instance_data
*scsi_id
=
2700 (struct scsi_id_instance_data
*)SCpnt
->device
->host
->hostdata
[0];
2701 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
2702 struct sbp2_command_info
*command
;
2704 SBP2_ERR("aborting sbp2 command");
2705 scsi_print_command(SCpnt
);
2710 * Right now, just return any matching command structures
2713 command
= sbp2util_find_command_for_SCpnt(scsi_id
, SCpnt
);
2715 SBP2_DEBUG("Found command to abort");
2716 pci_dma_sync_single_for_cpu(hi
->host
->pdev
,
2717 command
->command_orb_dma
,
2718 sizeof(struct sbp2_command_orb
),
2719 PCI_DMA_BIDIRECTIONAL
);
2720 pci_dma_sync_single_for_cpu(hi
->host
->pdev
,
2722 sizeof(command
->scatter_gather_element
),
2723 PCI_DMA_BIDIRECTIONAL
);
2724 sbp2util_mark_command_completed(scsi_id
, command
);
2725 if (command
->Current_SCpnt
) {
2726 command
->Current_SCpnt
->result
= DID_ABORT
<< 16;
2727 command
->Current_done(command
->Current_SCpnt
);
2732 * Initiate a fetch agent reset.
2734 sbp2_agent_reset(scsi_id
, 0);
2735 sbp2scsi_complete_all_commands(scsi_id
, DID_BUS_BUSY
);
2742 * Called by scsi stack when something has really gone wrong.
2744 static int __sbp2scsi_reset(struct scsi_cmnd
*SCpnt
)
2746 struct scsi_id_instance_data
*scsi_id
=
2747 (struct scsi_id_instance_data
*)SCpnt
->device
->host
->hostdata
[0];
2749 SBP2_ERR("reset requested");
2752 SBP2_ERR("Generating sbp2 fetch agent reset");
2753 sbp2_agent_reset(scsi_id
, 0);
2759 static int sbp2scsi_reset(struct scsi_cmnd
*SCpnt
)
2761 unsigned long flags
;
2764 spin_lock_irqsave(SCpnt
->device
->host
->host_lock
, flags
);
2765 rc
= __sbp2scsi_reset(SCpnt
);
2766 spin_unlock_irqrestore(SCpnt
->device
->host
->host_lock
, flags
);
2771 static const char *sbp2scsi_info (struct Scsi_Host
*host
)
2773 return "SCSI emulation for IEEE-1394 SBP-2 Devices";
2776 static ssize_t
sbp2_sysfs_ieee1394_id_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
2778 struct scsi_device
*sdev
;
2779 struct scsi_id_instance_data
*scsi_id
;
2782 if (!(sdev
= to_scsi_device(dev
)))
2785 if (!(scsi_id
= (struct scsi_id_instance_data
*)sdev
->host
->hostdata
[0]))
2788 if (scsi_id
->sbp2_device_type_and_lun
== SBP2_DEVICE_TYPE_LUN_UNINITIALIZED
)
2791 lun
= ORB_SET_LUN(scsi_id
->sbp2_device_type_and_lun
);
2793 return sprintf(buf
, "%016Lx:%d:%d\n", (unsigned long long)scsi_id
->ne
->guid
,
2794 scsi_id
->ud
->id
, lun
);
2796 static DEVICE_ATTR(ieee1394_id
, S_IRUGO
, sbp2_sysfs_ieee1394_id_show
, NULL
);
2798 static struct device_attribute
*sbp2_sysfs_sdev_attrs
[] = {
2799 &dev_attr_ieee1394_id
,
2803 MODULE_AUTHOR("Ben Collins <bcollins@debian.org>");
2804 MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver");
2805 MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME
);
2806 MODULE_LICENSE("GPL");
2808 /* SCSI host template */
2809 static struct scsi_host_template scsi_driver_template
= {
2810 .module
= THIS_MODULE
,
2811 .name
= "SBP-2 IEEE-1394",
2812 .proc_name
= SBP2_DEVICE_NAME
,
2813 .info
= sbp2scsi_info
,
2814 .queuecommand
= sbp2scsi_queuecommand
,
2815 .eh_abort_handler
= sbp2scsi_abort
,
2816 .eh_device_reset_handler
= sbp2scsi_reset
,
2817 .eh_bus_reset_handler
= sbp2scsi_reset
,
2818 .eh_host_reset_handler
= sbp2scsi_reset
,
2819 .slave_configure
= sbp2scsi_slave_configure
,
2821 .sg_tablesize
= SG_ALL
,
2822 .use_clustering
= ENABLE_CLUSTERING
,
2823 .cmd_per_lun
= SBP2_MAX_CMDS
,
2824 .can_queue
= SBP2_MAX_CMDS
,
2826 .sdev_attrs
= sbp2_sysfs_sdev_attrs
,
2829 static int sbp2_module_init(void)
2833 SBP2_DEBUG("sbp2_module_init");
2835 printk(KERN_INFO
"sbp2: %s\n", version
);
2837 /* Module load debug option to force one command at a time (serializing I/O) */
2839 SBP2_ERR("Driver forced to serialize I/O (serialize_io = 1)");
2840 scsi_driver_template
.can_queue
= 1;
2841 scsi_driver_template
.cmd_per_lun
= 1;
2844 /* Set max sectors (module load option). Default is 255 sectors. */
2845 scsi_driver_template
.max_sectors
= max_sectors
;
2848 /* Register our high level driver with 1394 stack */
2849 hpsb_register_highlevel(&sbp2_highlevel
);
2851 ret
= hpsb_register_protocol(&sbp2_driver
);
2853 SBP2_ERR("Failed to register protocol");
2854 hpsb_unregister_highlevel(&sbp2_highlevel
);
2861 static void __exit
sbp2_module_exit(void)
2863 SBP2_DEBUG("sbp2_module_exit");
2865 hpsb_unregister_protocol(&sbp2_driver
);
2867 hpsb_unregister_highlevel(&sbp2_highlevel
);
2870 module_init(sbp2_module_init
);
2871 module_exit(sbp2_module_exit
);