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"
84 * Module load parameter definitions
88 * Change max_speed on module load if you have a bad IEEE-1394
89 * controller that has trouble running 2KB packets at 400mb.
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.
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, 1 = 200mb, 0 = 100mb)");
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.
104 * TODO: Make this configurable per device.
106 static int serialize_io
= 1;
107 module_param(serialize_io
, int, 0444);
108 MODULE_PARM_DESC(serialize_io
, "Serialize I/O coming from scsi drivers (default = 1, faster = 0)");
111 * Bump up max_sectors if you'd like to support very large sized
112 * transfers. Please note that some older sbp2 bridge chips are broken for
113 * transfers greater or equal to 128KB. Default is a value of 255
114 * sectors, or just under 128KB (at 512 byte sector size). I can note that
115 * the Oxsemi sbp2 chipsets have no problems supporting very large
118 static int max_sectors
= SBP2_MAX_SECTORS
;
119 module_param(max_sectors
, int, 0444);
120 MODULE_PARM_DESC(max_sectors
, "Change max sectors per I/O supported (default = 255)");
123 * Exclusive login to sbp2 device? In most cases, the sbp2 driver should
124 * do an exclusive login, as it's generally unsafe to have two hosts
125 * talking to a single sbp2 device at the same time (filesystem coherency,
126 * etc.). If you're running an sbp2 device that supports multiple logins,
127 * and you're either running read-only filesystems or some sort of special
128 * filesystem supporting multiple hosts (one such filesystem is OpenGFS,
129 * see opengfs.sourceforge.net for more info), then set exclusive_login
130 * to zero. Note: The Oxsemi OXFW911 sbp2 chipset supports up to four
133 static int exclusive_login
= 1;
134 module_param(exclusive_login
, int, 0644);
135 MODULE_PARM_DESC(exclusive_login
, "Exclusive login to sbp2 device (default = 1)");
138 * SCSI inquiry hack for really badly behaved sbp2 devices. Turn this on
139 * if your sbp2 device is not properly handling the SCSI inquiry command.
140 * This hack makes the inquiry look more like a typical MS Windows
143 * If force_inquiry_hack=1 is required for your device to work,
144 * please submit the logged sbp2_firmware_revision value of this device to
145 * the linux1394-devel mailing list.
147 static int force_inquiry_hack
;
148 module_param(force_inquiry_hack
, int, 0444);
149 MODULE_PARM_DESC(force_inquiry_hack
, "Force SCSI inquiry hack (default = 0)");
152 * Export information about protocols/devices supported by this driver.
154 static struct ieee1394_device_id sbp2_id_table
[] = {
156 .match_flags
= IEEE1394_MATCH_SPECIFIER_ID
| IEEE1394_MATCH_VERSION
,
157 .specifier_id
= SBP2_UNIT_SPEC_ID_ENTRY
& 0xffffff,
158 .version
= SBP2_SW_VERSION_ENTRY
& 0xffffff},
162 MODULE_DEVICE_TABLE(ieee1394
, sbp2_id_table
);
165 * Debug levels, configured via kernel config, or enable here.
168 #define CONFIG_IEEE1394_SBP2_DEBUG 0
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 */
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--
181 #define SBP2_ORB_DEBUG(fmt, args...)
182 #define outstanding_orb_incr
183 #define outstanding_orb_decr
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;
195 #define SBP2_DMA_ALLOC(fmt, args...)
196 #define SBP2_DMA_FREE(fmt, args...)
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)
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)
216 #define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args)
222 static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data
*scsi_id
,
225 static void sbp2scsi_complete_command(struct scsi_id_instance_data
*scsi_id
,
226 u32 scsi_status
, struct scsi_cmnd
*SCpnt
,
227 void (*done
)(struct scsi_cmnd
*));
229 static struct scsi_host_template scsi_driver_template
;
231 static const u8 sbp2_speedto_max_payload
[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC };
233 static void sbp2_host_reset(struct hpsb_host
*host
);
235 static int sbp2_probe(struct device
*dev
);
236 static int sbp2_remove(struct device
*dev
);
237 static int sbp2_update(struct unit_directory
*ud
);
239 static struct hpsb_highlevel sbp2_highlevel
= {
240 .name
= SBP2_DEVICE_NAME
,
241 .host_reset
= sbp2_host_reset
,
244 static struct hpsb_address_ops sbp2_ops
= {
245 .write
= sbp2_handle_status_write
248 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
249 static struct hpsb_address_ops sbp2_physdma_ops
= {
250 .read
= sbp2_handle_physdma_read
,
251 .write
= sbp2_handle_physdma_write
,
255 static struct hpsb_protocol_driver sbp2_driver
= {
256 .name
= "SBP2 Driver",
257 .id_table
= sbp2_id_table
,
258 .update
= sbp2_update
,
260 .name
= SBP2_DEVICE_NAME
,
261 .bus
= &ieee1394_bus_type
,
263 .remove
= sbp2_remove
,
268 /* List of device firmware's that require a forced 36 byte inquiry. */
269 static u32 sbp2_broken_inquiry_list
[] = {
270 0x00002800, /* Stefan Richter <richtest@bauwesen.tu-cottbus.de> */
271 /* DViCO Momobay CX-1 */
272 0x00000200 /* Andreas Plesch <plesch@fas.harvard.edu> */
273 /* QPS Fire DVDBurner */
276 #define NUM_BROKEN_INQUIRY_DEVS \
277 (sizeof(sbp2_broken_inquiry_list)/sizeof(*sbp2_broken_inquiry_list))
279 /**************************************
280 * General utility functions
281 **************************************/
285 * Converts a buffer from be32 to cpu byte ordering. Length is in bytes.
287 static __inline__
void sbp2util_be32_to_cpu_buffer(void *buffer
, int length
)
291 for (length
= (length
>> 2); length
--; )
292 temp
[length
] = be32_to_cpu(temp
[length
]);
298 * Converts a buffer from cpu to be32 byte ordering. Length is in bytes.
300 static __inline__
void sbp2util_cpu_to_be32_buffer(void *buffer
, int length
)
304 for (length
= (length
>> 2); length
--; )
305 temp
[length
] = cpu_to_be32(temp
[length
]);
309 #else /* BIG_ENDIAN */
310 /* Why waste the cpu cycles? */
311 #define sbp2util_be32_to_cpu_buffer(x,y)
312 #define sbp2util_cpu_to_be32_buffer(x,y)
315 #ifdef CONFIG_IEEE1394_SBP2_PACKET_DUMP
317 * Debug packet dump routine. Length is in bytes.
319 static void sbp2util_packet_dump(void *buffer
, int length
, char *dump_name
,
323 unsigned char *dump
= buffer
;
325 if (!dump
|| !length
|| !dump_name
)
329 printk("[%s, 0x%x]", dump_name
, dump_phys_addr
);
331 printk("[%s]", dump_name
);
332 for (i
= 0; i
< length
; i
++) {
341 printk("%02x ", (int)dump
[i
]);
348 #define sbp2util_packet_dump(w,x,y,z)
352 * Goofy routine that basically does a down_timeout function.
354 static int sbp2util_down_timeout(atomic_t
*done
, int timeout
)
358 for (i
= timeout
; (i
> 0 && atomic_read(done
) == 0); i
-= HZ
/10) {
359 if (msleep_interruptible(100)) /* 100ms */
362 return (i
> 0) ? 0 : 1;
365 /* Free's an allocated packet */
366 static void sbp2_free_packet(struct hpsb_packet
*packet
)
368 hpsb_free_tlabel(packet
);
369 hpsb_free_packet(packet
);
372 /* This is much like hpsb_node_write(), except it ignores the response
373 * subaction and returns immediately. Can be used from interrupts.
375 static int sbp2util_node_write_no_wait(struct node_entry
*ne
, u64 addr
,
376 quadlet_t
*buffer
, size_t length
)
378 struct hpsb_packet
*packet
;
380 packet
= hpsb_make_writepacket(ne
->host
, ne
->nodeid
,
381 addr
, buffer
, length
);
385 hpsb_set_packet_complete_task(packet
,
386 (void (*)(void *))sbp2_free_packet
,
389 hpsb_node_fill_packet(ne
, packet
);
391 if (hpsb_send_packet(packet
) < 0) {
392 sbp2_free_packet(packet
);
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.
403 static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data
*scsi_id
)
405 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
407 unsigned long flags
, orbs
;
408 struct sbp2_command_info
*command
;
410 orbs
= serialize_io
? 2 : SBP2_MAX_CMDS
;
412 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
413 for (i
= 0; i
< orbs
; i
++) {
414 command
= kzalloc(sizeof(*command
), GFP_ATOMIC
);
416 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
,
420 command
->command_orb_dma
=
421 pci_map_single(hi
->host
->pdev
, &command
->command_orb
,
422 sizeof(struct sbp2_command_orb
),
423 PCI_DMA_BIDIRECTIONAL
);
424 SBP2_DMA_ALLOC("single command orb DMA");
426 pci_map_single(hi
->host
->pdev
,
427 &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
);
434 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
439 * This function is called to delete a pool of command orbs.
441 static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data
*scsi_id
)
443 struct hpsb_host
*host
= scsi_id
->hi
->host
;
444 struct list_head
*lh
, *next
;
445 struct sbp2_command_info
*command
;
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
);
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");
466 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
471 * This function finds the sbp2_command for a given outstanding command
472 * orb.Only looks at the inuse list.
474 static struct sbp2_command_info
*sbp2util_find_command_for_orb(
475 struct scsi_id_instance_data
*scsi_id
, dma_addr_t orb
)
477 struct sbp2_command_info
*command
;
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
);
489 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
491 SBP2_ORB_DEBUG("could not match command orb %x", (unsigned int)orb
);
497 * This function finds the sbp2_command for a given outstanding SCpnt.
498 * Only looks at the inuse list.
500 static struct sbp2_command_info
*sbp2util_find_command_for_SCpnt(struct scsi_id_instance_data
*scsi_id
, void *SCpnt
)
502 struct sbp2_command_info
*command
;
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
);
514 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
519 * This function allocates a command orb used to send a scsi command.
521 static struct sbp2_command_info
*sbp2util_allocate_command_orb(
522 struct scsi_id_instance_data
*scsi_id
,
523 struct scsi_cmnd
*Current_SCpnt
,
524 void (*Current_done
)(struct scsi_cmnd
*))
526 struct list_head
*lh
;
527 struct sbp2_command_info
*command
= NULL
;
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
;
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
);
539 SBP2_ERR("sbp2util_allocate_command_orb - No orbs available!");
541 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
546 static void sbp2util_free_command_dma(struct sbp2_command_info
*command
)
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
;
553 printk(KERN_ERR
"%s: scsi_id == NULL\n", __FUNCTION__
);
557 host
= scsi_id
->ud
->ne
->host
;
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;
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
;
582 * This function moves a command to the completed orb list.
584 static void sbp2util_mark_command_completed(struct scsi_id_instance_data
*scsi_id
,
585 struct sbp2_command_info
*command
)
589 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
590 list_del(&command
->list
);
591 sbp2util_free_command_dma(command
);
592 list_add_tail(&command
->list
, &scsi_id
->sbp2_command_orb_completed
);
593 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
597 * Is scsi_id valid? Is the 1394 node still present?
599 static inline int sbp2util_node_is_available(struct scsi_id_instance_data
*scsi_id
)
601 return scsi_id
&& scsi_id
->ne
&& !scsi_id
->ne
->in_limbo
;
604 /*********************************************
605 * IEEE-1394 core driver stack related section
606 *********************************************/
607 static struct scsi_id_instance_data
*sbp2_alloc_device(struct unit_directory
*ud
);
609 static int sbp2_probe(struct device
*dev
)
611 struct unit_directory
*ud
;
612 struct scsi_id_instance_data
*scsi_id
;
614 SBP2_DEBUG("sbp2_probe");
616 ud
= container_of(dev
, struct unit_directory
, device
);
618 /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s)
620 if (ud
->flags
& UNIT_DIRECTORY_HAS_LUN_DIRECTORY
)
623 scsi_id
= sbp2_alloc_device(ud
);
628 sbp2_parse_unit_directory(scsi_id
, ud
);
630 return sbp2_start_device(scsi_id
);
633 static int sbp2_remove(struct device
*dev
)
635 struct unit_directory
*ud
;
636 struct scsi_id_instance_data
*scsi_id
;
637 struct scsi_device
*sdev
;
639 SBP2_DEBUG("sbp2_remove");
641 ud
= container_of(dev
, struct unit_directory
, device
);
642 scsi_id
= ud
->device
.driver_data
;
646 if (scsi_id
->scsi_host
) {
647 /* Get rid of enqueued commands if there is no chance to
649 if (!sbp2util_node_is_available(scsi_id
))
650 sbp2scsi_complete_all_commands(scsi_id
, DID_NO_CONNECT
);
651 /* scsi_remove_device() will trigger shutdown functions of SCSI
652 * highlevel drivers which would deadlock if blocked. */
653 scsi_unblock_requests(scsi_id
->scsi_host
);
655 sdev
= scsi_id
->sdev
;
657 scsi_id
->sdev
= NULL
;
658 scsi_remove_device(sdev
);
661 sbp2_logout_device(scsi_id
);
662 sbp2_remove_device(scsi_id
);
667 static int sbp2_update(struct unit_directory
*ud
)
669 struct scsi_id_instance_data
*scsi_id
= ud
->device
.driver_data
;
671 SBP2_DEBUG("sbp2_update");
673 if (sbp2_reconnect_device(scsi_id
)) {
676 * Ok, reconnect has failed. Perhaps we didn't
677 * reconnect fast enough. Try doing a regular login, but
678 * first do a logout just in case of any weirdness.
680 sbp2_logout_device(scsi_id
);
682 if (sbp2_login_device(scsi_id
)) {
683 /* Login failed too, just fail, and the backend
684 * will call our sbp2_remove for us */
685 SBP2_ERR("Failed to reconnect to sbp2 device!");
690 /* Set max retries to something large on the device. */
691 sbp2_set_busy_timeout(scsi_id
);
693 /* Do a SBP-2 fetch agent reset. */
694 sbp2_agent_reset(scsi_id
, 1);
696 /* Get the max speed and packet size that we can use. */
697 sbp2_max_speed_and_size(scsi_id
);
699 /* Complete any pending commands with busy (so they get
700 * retried) and remove them from our queue
702 sbp2scsi_complete_all_commands(scsi_id
, DID_BUS_BUSY
);
704 /* Make sure we unblock requests (since this is likely after a bus
706 scsi_unblock_requests(scsi_id
->scsi_host
);
711 /* This functions is called by the sbp2_probe, for each new device. We now
712 * allocate one scsi host for each scsi_id (unit directory). */
713 static struct scsi_id_instance_data
*sbp2_alloc_device(struct unit_directory
*ud
)
715 struct sbp2scsi_host_info
*hi
;
716 struct Scsi_Host
*scsi_host
= NULL
;
717 struct scsi_id_instance_data
*scsi_id
= NULL
;
719 SBP2_DEBUG("sbp2_alloc_device");
721 scsi_id
= kzalloc(sizeof(*scsi_id
), GFP_KERNEL
);
723 SBP2_ERR("failed to create scsi_id");
727 scsi_id
->ne
= ud
->ne
;
729 scsi_id
->speed_code
= IEEE1394_SPEED_100
;
730 scsi_id
->max_payload_size
= sbp2_speedto_max_payload
[IEEE1394_SPEED_100
];
731 atomic_set(&scsi_id
->sbp2_login_complete
, 0);
732 INIT_LIST_HEAD(&scsi_id
->sbp2_command_orb_inuse
);
733 INIT_LIST_HEAD(&scsi_id
->sbp2_command_orb_completed
);
734 INIT_LIST_HEAD(&scsi_id
->scsi_list
);
735 spin_lock_init(&scsi_id
->sbp2_command_orb_lock
);
736 scsi_id
->sbp2_lun
= 0;
738 ud
->device
.driver_data
= scsi_id
;
740 hi
= hpsb_get_hostinfo(&sbp2_highlevel
, ud
->ne
->host
);
742 hi
= hpsb_create_hostinfo(&sbp2_highlevel
, ud
->ne
->host
, sizeof(*hi
));
744 SBP2_ERR("failed to allocate hostinfo");
747 SBP2_DEBUG("sbp2_alloc_device: allocated hostinfo");
748 hi
->host
= ud
->ne
->host
;
749 INIT_LIST_HEAD(&hi
->scsi_ids
);
751 /* Register our sbp2 status address space... */
752 hpsb_register_addrspace(&sbp2_highlevel
, ud
->ne
->host
, &sbp2_ops
,
753 SBP2_STATUS_FIFO_ADDRESS
,
754 SBP2_STATUS_FIFO_ADDRESS
+
755 SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(SBP2_MAX_UDS_PER_NODE
+1));
756 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
757 /* Handle data movement if physical dma is not
758 * enabled/supportedon host controller */
759 hpsb_register_addrspace(&sbp2_highlevel
, ud
->ne
->host
, &sbp2_physdma_ops
,
760 0x0ULL
, 0xfffffffcULL
);
766 list_add_tail(&scsi_id
->scsi_list
, &hi
->scsi_ids
);
768 /* Register our host with the SCSI stack. */
769 scsi_host
= scsi_host_alloc(&scsi_driver_template
,
770 sizeof(unsigned long));
772 SBP2_ERR("failed to register scsi host");
776 scsi_host
->hostdata
[0] = (unsigned long)scsi_id
;
778 if (!scsi_add_host(scsi_host
, &ud
->device
)) {
779 scsi_id
->scsi_host
= scsi_host
;
783 SBP2_ERR("failed to add scsi host");
784 scsi_host_put(scsi_host
);
787 sbp2_remove_device(scsi_id
);
791 static void sbp2_host_reset(struct hpsb_host
*host
)
793 struct sbp2scsi_host_info
*hi
;
794 struct scsi_id_instance_data
*scsi_id
;
796 hi
= hpsb_get_hostinfo(&sbp2_highlevel
, host
);
799 list_for_each_entry(scsi_id
, &hi
->scsi_ids
, scsi_list
)
800 scsi_block_requests(scsi_id
->scsi_host
);
805 * This function is where we first pull the node unique ids, and then
806 * allocate memory and register a SBP-2 device.
808 static int sbp2_start_device(struct scsi_id_instance_data
*scsi_id
)
810 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
813 SBP2_DEBUG("sbp2_start_device");
816 scsi_id
->login_response
=
817 pci_alloc_consistent(hi
->host
->pdev
,
818 sizeof(struct sbp2_login_response
),
819 &scsi_id
->login_response_dma
);
820 if (!scsi_id
->login_response
)
822 SBP2_DMA_ALLOC("consistent DMA region for login FIFO");
824 /* Query logins ORB DMA */
825 scsi_id
->query_logins_orb
=
826 pci_alloc_consistent(hi
->host
->pdev
,
827 sizeof(struct sbp2_query_logins_orb
),
828 &scsi_id
->query_logins_orb_dma
);
829 if (!scsi_id
->query_logins_orb
)
831 SBP2_DMA_ALLOC("consistent DMA region for query logins ORB");
833 /* Query logins response DMA */
834 scsi_id
->query_logins_response
=
835 pci_alloc_consistent(hi
->host
->pdev
,
836 sizeof(struct sbp2_query_logins_response
),
837 &scsi_id
->query_logins_response_dma
);
838 if (!scsi_id
->query_logins_response
)
840 SBP2_DMA_ALLOC("consistent DMA region for query logins response");
842 /* Reconnect ORB DMA */
843 scsi_id
->reconnect_orb
=
844 pci_alloc_consistent(hi
->host
->pdev
,
845 sizeof(struct sbp2_reconnect_orb
),
846 &scsi_id
->reconnect_orb_dma
);
847 if (!scsi_id
->reconnect_orb
)
849 SBP2_DMA_ALLOC("consistent DMA region for reconnect ORB");
852 scsi_id
->logout_orb
=
853 pci_alloc_consistent(hi
->host
->pdev
,
854 sizeof(struct sbp2_logout_orb
),
855 &scsi_id
->logout_orb_dma
);
856 if (!scsi_id
->logout_orb
)
858 SBP2_DMA_ALLOC("consistent DMA region for logout ORB");
862 pci_alloc_consistent(hi
->host
->pdev
,
863 sizeof(struct sbp2_login_orb
),
864 &scsi_id
->login_orb_dma
);
865 if (!scsi_id
->login_orb
)
867 SBP2_DMA_ALLOC("consistent DMA region for login ORB");
869 SBP2_DEBUG("New SBP-2 device inserted, SCSI ID = %x", scsi_id
->ud
->id
);
872 * Create our command orb pool
874 if (sbp2util_create_command_orb_pool(scsi_id
)) {
875 SBP2_ERR("sbp2util_create_command_orb_pool failed!");
876 sbp2_remove_device(scsi_id
);
880 /* Schedule a timeout here. The reason is that we may be so close
881 * to a bus reset, that the device is not available for logins.
882 * This can happen when the bus reset is caused by the host
883 * connected to the sbp2 device being removed. That host would
884 * have a certain amount of time to relogin before the sbp2 device
885 * allows someone else to login instead. One second makes sense. */
886 msleep_interruptible(1000);
887 if (signal_pending(current
)) {
888 SBP2_WARN("aborting sbp2_start_device due to event");
889 sbp2_remove_device(scsi_id
);
894 * Login to the sbp-2 device
896 if (sbp2_login_device(scsi_id
)) {
897 /* Login failed, just remove the device. */
898 sbp2_remove_device(scsi_id
);
903 * Set max retries to something large on the device
905 sbp2_set_busy_timeout(scsi_id
);
908 * Do a SBP-2 fetch agent reset
910 sbp2_agent_reset(scsi_id
, 1);
913 * Get the max speed and packet size that we can use
915 sbp2_max_speed_and_size(scsi_id
);
917 /* Add this device to the scsi layer now */
918 error
= scsi_add_device(scsi_id
->scsi_host
, 0, scsi_id
->ud
->id
, 0);
920 SBP2_ERR("scsi_add_device failed");
921 sbp2_logout_device(scsi_id
);
922 sbp2_remove_device(scsi_id
);
929 SBP2_ERR("Could not allocate memory for scsi_id");
930 sbp2_remove_device(scsi_id
);
935 * This function removes an sbp2 device from the sbp2scsi_host_info struct.
937 static void sbp2_remove_device(struct scsi_id_instance_data
*scsi_id
)
939 struct sbp2scsi_host_info
*hi
;
941 SBP2_DEBUG("sbp2_remove_device");
948 /* This will remove our scsi device aswell */
949 if (scsi_id
->scsi_host
) {
950 scsi_remove_host(scsi_id
->scsi_host
);
951 scsi_host_put(scsi_id
->scsi_host
);
954 sbp2util_remove_command_orb_pool(scsi_id
);
956 list_del(&scsi_id
->scsi_list
);
958 if (scsi_id
->login_response
) {
959 pci_free_consistent(hi
->host
->pdev
,
960 sizeof(struct sbp2_login_response
),
961 scsi_id
->login_response
,
962 scsi_id
->login_response_dma
);
963 SBP2_DMA_FREE("single login FIFO");
966 if (scsi_id
->login_orb
) {
967 pci_free_consistent(hi
->host
->pdev
,
968 sizeof(struct sbp2_login_orb
),
970 scsi_id
->login_orb_dma
);
971 SBP2_DMA_FREE("single login ORB");
974 if (scsi_id
->reconnect_orb
) {
975 pci_free_consistent(hi
->host
->pdev
,
976 sizeof(struct sbp2_reconnect_orb
),
977 scsi_id
->reconnect_orb
,
978 scsi_id
->reconnect_orb_dma
);
979 SBP2_DMA_FREE("single reconnect orb");
982 if (scsi_id
->logout_orb
) {
983 pci_free_consistent(hi
->host
->pdev
,
984 sizeof(struct sbp2_logout_orb
),
986 scsi_id
->logout_orb_dma
);
987 SBP2_DMA_FREE("single logout orb");
990 if (scsi_id
->query_logins_orb
) {
991 pci_free_consistent(hi
->host
->pdev
,
992 sizeof(struct sbp2_query_logins_orb
),
993 scsi_id
->query_logins_orb
,
994 scsi_id
->query_logins_orb_dma
);
995 SBP2_DMA_FREE("single query logins orb");
998 if (scsi_id
->query_logins_response
) {
999 pci_free_consistent(hi
->host
->pdev
,
1000 sizeof(struct sbp2_query_logins_response
),
1001 scsi_id
->query_logins_response
,
1002 scsi_id
->query_logins_response_dma
);
1003 SBP2_DMA_FREE("single query logins data");
1006 scsi_id
->ud
->device
.driver_data
= NULL
;
1008 SBP2_DEBUG("SBP-2 device removed, SCSI ID = %d", scsi_id
->ud
->id
);
1013 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
1015 * This function deals with physical dma write requests (for adapters that do not support
1016 * physical dma in hardware). Mostly just here for debugging...
1018 static int sbp2_handle_physdma_write(struct hpsb_host
*host
, int nodeid
,
1019 int destid
, quadlet_t
*data
, u64 addr
,
1020 size_t length
, u16 flags
)
1024 * Manually put the data in the right place.
1026 memcpy(bus_to_virt((u32
) addr
), data
, length
);
1027 sbp2util_packet_dump(data
, length
, "sbp2 phys dma write by device",
1029 return RCODE_COMPLETE
;
1033 * This function deals with physical dma read requests (for adapters that do not support
1034 * physical dma in hardware). Mostly just here for debugging...
1036 static int sbp2_handle_physdma_read(struct hpsb_host
*host
, int nodeid
,
1037 quadlet_t
*data
, u64 addr
, size_t length
,
1042 * Grab data from memory and send a read response.
1044 memcpy(data
, bus_to_virt((u32
) addr
), length
);
1045 sbp2util_packet_dump(data
, length
, "sbp2 phys dma read by device",
1047 return RCODE_COMPLETE
;
1051 /**************************************
1052 * SBP-2 protocol related section
1053 **************************************/
1056 * This function queries the device for the maximum concurrent logins it
1059 static int sbp2_query_logins(struct scsi_id_instance_data
*scsi_id
)
1061 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1066 SBP2_DEBUG("sbp2_query_logins");
1068 scsi_id
->query_logins_orb
->reserved1
= 0x0;
1069 scsi_id
->query_logins_orb
->reserved2
= 0x0;
1071 scsi_id
->query_logins_orb
->query_response_lo
= scsi_id
->query_logins_response_dma
;
1072 scsi_id
->query_logins_orb
->query_response_hi
= ORB_SET_NODE_ID(hi
->host
->node_id
);
1073 SBP2_DEBUG("sbp2_query_logins: query_response_hi/lo initialized");
1075 scsi_id
->query_logins_orb
->lun_misc
= ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST
);
1076 scsi_id
->query_logins_orb
->lun_misc
|= ORB_SET_NOTIFY(1);
1077 scsi_id
->query_logins_orb
->lun_misc
|= ORB_SET_LUN(scsi_id
->sbp2_lun
);
1078 SBP2_DEBUG("sbp2_query_logins: lun_misc initialized");
1080 scsi_id
->query_logins_orb
->reserved_resp_length
=
1081 ORB_SET_QUERY_LOGINS_RESP_LENGTH(sizeof(struct sbp2_query_logins_response
));
1082 SBP2_DEBUG("sbp2_query_logins: reserved_resp_length initialized");
1084 scsi_id
->query_logins_orb
->status_FIFO_lo
= SBP2_STATUS_FIFO_ADDRESS_LO
+
1085 SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id
->ud
->id
);
1086 scsi_id
->query_logins_orb
->status_FIFO_hi
= (ORB_SET_NODE_ID(hi
->host
->node_id
) |
1087 SBP2_STATUS_FIFO_ADDRESS_HI
);
1088 SBP2_DEBUG("sbp2_query_logins: status FIFO initialized");
1090 sbp2util_cpu_to_be32_buffer(scsi_id
->query_logins_orb
, sizeof(struct sbp2_query_logins_orb
));
1092 SBP2_DEBUG("sbp2_query_logins: orb byte-swapped");
1094 sbp2util_packet_dump(scsi_id
->query_logins_orb
, sizeof(struct sbp2_query_logins_orb
),
1095 "sbp2 query logins orb", scsi_id
->query_logins_orb_dma
);
1097 memset(scsi_id
->query_logins_response
, 0, sizeof(struct sbp2_query_logins_response
));
1098 memset(&scsi_id
->status_block
, 0, sizeof(struct sbp2_status_block
));
1100 SBP2_DEBUG("sbp2_query_logins: query_logins_response/status FIFO memset");
1102 data
[0] = ORB_SET_NODE_ID(hi
->host
->node_id
);
1103 data
[1] = scsi_id
->query_logins_orb_dma
;
1104 sbp2util_cpu_to_be32_buffer(data
, 8);
1106 atomic_set(&scsi_id
->sbp2_login_complete
, 0);
1108 SBP2_DEBUG("sbp2_query_logins: prepared to write");
1109 hpsb_node_write(scsi_id
->ne
, scsi_id
->sbp2_management_agent_addr
, data
, 8);
1110 SBP2_DEBUG("sbp2_query_logins: written");
1112 if (sbp2util_down_timeout(&scsi_id
->sbp2_login_complete
, 2*HZ
)) {
1113 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1117 if (scsi_id
->status_block
.ORB_offset_lo
!= scsi_id
->query_logins_orb_dma
) {
1118 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1122 if (STATUS_GET_RESP(scsi_id
->status_block
.ORB_offset_hi_misc
) ||
1123 STATUS_GET_DEAD_BIT(scsi_id
->status_block
.ORB_offset_hi_misc
) ||
1124 STATUS_GET_SBP_STATUS(scsi_id
->status_block
.ORB_offset_hi_misc
)) {
1126 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
1130 sbp2util_cpu_to_be32_buffer(scsi_id
->query_logins_response
, sizeof(struct sbp2_query_logins_response
));
1132 SBP2_DEBUG("length_max_logins = %x",
1133 (unsigned int)scsi_id
->query_logins_response
->length_max_logins
);
1135 SBP2_DEBUG("Query logins to SBP-2 device successful");
1137 max_logins
= RESPONSE_GET_MAX_LOGINS(scsi_id
->query_logins_response
->length_max_logins
);
1138 SBP2_DEBUG("Maximum concurrent logins supported: %d", max_logins
);
1140 active_logins
= RESPONSE_GET_ACTIVE_LOGINS(scsi_id
->query_logins_response
->length_max_logins
);
1141 SBP2_DEBUG("Number of active logins: %d", active_logins
);
1143 if (active_logins
>= max_logins
) {
1151 * This function is called in order to login to a particular SBP-2 device,
1152 * after a bus reset.
1154 static int sbp2_login_device(struct scsi_id_instance_data
*scsi_id
)
1156 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1159 SBP2_DEBUG("sbp2_login_device");
1161 if (!scsi_id
->login_orb
) {
1162 SBP2_DEBUG("sbp2_login_device: login_orb not alloc'd!");
1166 if (!exclusive_login
) {
1167 if (sbp2_query_logins(scsi_id
)) {
1168 SBP2_INFO("Device does not support any more concurrent logins");
1173 /* Set-up login ORB, assume no password */
1174 scsi_id
->login_orb
->password_hi
= 0;
1175 scsi_id
->login_orb
->password_lo
= 0;
1176 SBP2_DEBUG("sbp2_login_device: password_hi/lo initialized");
1178 scsi_id
->login_orb
->login_response_lo
= scsi_id
->login_response_dma
;
1179 scsi_id
->login_orb
->login_response_hi
= ORB_SET_NODE_ID(hi
->host
->node_id
);
1180 SBP2_DEBUG("sbp2_login_device: login_response_hi/lo initialized");
1182 scsi_id
->login_orb
->lun_misc
= ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST
);
1183 scsi_id
->login_orb
->lun_misc
|= ORB_SET_RECONNECT(0); /* One second reconnect time */
1184 scsi_id
->login_orb
->lun_misc
|= ORB_SET_EXCLUSIVE(exclusive_login
); /* Exclusive access to device */
1185 scsi_id
->login_orb
->lun_misc
|= ORB_SET_NOTIFY(1); /* Notify us of login complete */
1186 scsi_id
->login_orb
->lun_misc
|= ORB_SET_LUN(scsi_id
->sbp2_lun
);
1187 SBP2_DEBUG("sbp2_login_device: lun_misc initialized");
1189 scsi_id
->login_orb
->passwd_resp_lengths
=
1190 ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response
));
1191 SBP2_DEBUG("sbp2_login_device: passwd_resp_lengths initialized");
1193 scsi_id
->login_orb
->status_FIFO_lo
= SBP2_STATUS_FIFO_ADDRESS_LO
+
1194 SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id
->ud
->id
);
1195 scsi_id
->login_orb
->status_FIFO_hi
= (ORB_SET_NODE_ID(hi
->host
->node_id
) |
1196 SBP2_STATUS_FIFO_ADDRESS_HI
);
1197 SBP2_DEBUG("sbp2_login_device: status FIFO initialized");
1200 * Byte swap ORB if necessary
1202 sbp2util_cpu_to_be32_buffer(scsi_id
->login_orb
, sizeof(struct sbp2_login_orb
));
1204 SBP2_DEBUG("sbp2_login_device: orb byte-swapped");
1206 sbp2util_packet_dump(scsi_id
->login_orb
, sizeof(struct sbp2_login_orb
),
1207 "sbp2 login orb", scsi_id
->login_orb_dma
);
1210 * Initialize login response and status fifo
1212 memset(scsi_id
->login_response
, 0, sizeof(struct sbp2_login_response
));
1213 memset(&scsi_id
->status_block
, 0, sizeof(struct sbp2_status_block
));
1215 SBP2_DEBUG("sbp2_login_device: login_response/status FIFO memset");
1218 * Ok, let's write to the target's management agent register
1220 data
[0] = ORB_SET_NODE_ID(hi
->host
->node_id
);
1221 data
[1] = scsi_id
->login_orb_dma
;
1222 sbp2util_cpu_to_be32_buffer(data
, 8);
1224 atomic_set(&scsi_id
->sbp2_login_complete
, 0);
1226 SBP2_DEBUG("sbp2_login_device: prepared to write to %08x",
1227 (unsigned int)scsi_id
->sbp2_management_agent_addr
);
1228 hpsb_node_write(scsi_id
->ne
, scsi_id
->sbp2_management_agent_addr
, data
, 8);
1229 SBP2_DEBUG("sbp2_login_device: written");
1232 * Wait for login status (up to 20 seconds)...
1234 if (sbp2util_down_timeout(&scsi_id
->sbp2_login_complete
, 20*HZ
)) {
1235 SBP2_ERR("Error logging into SBP-2 device - login timed-out");
1240 * Sanity. Make sure status returned matches login orb.
1242 if (scsi_id
->status_block
.ORB_offset_lo
!= scsi_id
->login_orb_dma
) {
1243 SBP2_ERR("Error logging into SBP-2 device - login timed-out");
1250 if (STATUS_GET_RESP(scsi_id
->status_block
.ORB_offset_hi_misc
) ||
1251 STATUS_GET_DEAD_BIT(scsi_id
->status_block
.ORB_offset_hi_misc
) ||
1252 STATUS_GET_SBP_STATUS(scsi_id
->status_block
.ORB_offset_hi_misc
)) {
1254 SBP2_ERR("Error logging into SBP-2 device - login failed");
1259 * Byte swap the login response, for use when reconnecting or
1262 sbp2util_cpu_to_be32_buffer(scsi_id
->login_response
, sizeof(struct sbp2_login_response
));
1265 * Grab our command block agent address from the login response.
1267 SBP2_DEBUG("command_block_agent_hi = %x",
1268 (unsigned int)scsi_id
->login_response
->command_block_agent_hi
);
1269 SBP2_DEBUG("command_block_agent_lo = %x",
1270 (unsigned int)scsi_id
->login_response
->command_block_agent_lo
);
1272 scsi_id
->sbp2_command_block_agent_addr
=
1273 ((u64
)scsi_id
->login_response
->command_block_agent_hi
) << 32;
1274 scsi_id
->sbp2_command_block_agent_addr
|= ((u64
)scsi_id
->login_response
->command_block_agent_lo
);
1275 scsi_id
->sbp2_command_block_agent_addr
&= 0x0000ffffffffffffULL
;
1277 SBP2_INFO("Logged into SBP-2 device");
1284 * This function is called in order to logout from a particular SBP-2
1285 * device, usually called during driver unload.
1287 static int sbp2_logout_device(struct scsi_id_instance_data
*scsi_id
)
1289 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1293 SBP2_DEBUG("sbp2_logout_device");
1298 scsi_id
->logout_orb
->reserved1
= 0x0;
1299 scsi_id
->logout_orb
->reserved2
= 0x0;
1300 scsi_id
->logout_orb
->reserved3
= 0x0;
1301 scsi_id
->logout_orb
->reserved4
= 0x0;
1303 scsi_id
->logout_orb
->login_ID_misc
= ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST
);
1304 scsi_id
->logout_orb
->login_ID_misc
|= ORB_SET_LOGIN_ID(scsi_id
->login_response
->length_login_ID
);
1306 /* Notify us when complete */
1307 scsi_id
->logout_orb
->login_ID_misc
|= ORB_SET_NOTIFY(1);
1309 scsi_id
->logout_orb
->reserved5
= 0x0;
1310 scsi_id
->logout_orb
->status_FIFO_lo
= SBP2_STATUS_FIFO_ADDRESS_LO
+
1311 SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id
->ud
->id
);
1312 scsi_id
->logout_orb
->status_FIFO_hi
= (ORB_SET_NODE_ID(hi
->host
->node_id
) |
1313 SBP2_STATUS_FIFO_ADDRESS_HI
);
1316 * Byte swap ORB if necessary
1318 sbp2util_cpu_to_be32_buffer(scsi_id
->logout_orb
, sizeof(struct sbp2_logout_orb
));
1320 sbp2util_packet_dump(scsi_id
->logout_orb
, sizeof(struct sbp2_logout_orb
),
1321 "sbp2 logout orb", scsi_id
->logout_orb_dma
);
1324 * Ok, let's write to the target's management agent register
1326 data
[0] = ORB_SET_NODE_ID(hi
->host
->node_id
);
1327 data
[1] = scsi_id
->logout_orb_dma
;
1328 sbp2util_cpu_to_be32_buffer(data
, 8);
1330 atomic_set(&scsi_id
->sbp2_login_complete
, 0);
1332 error
= hpsb_node_write(scsi_id
->ne
,
1333 scsi_id
->sbp2_management_agent_addr
, data
, 8);
1337 /* Wait for device to logout...1 second. */
1338 if (sbp2util_down_timeout(&scsi_id
->sbp2_login_complete
, HZ
))
1341 SBP2_INFO("Logged out of SBP-2 device");
1348 * This function is called in order to reconnect to a particular SBP-2
1349 * device, after a bus reset.
1351 static int sbp2_reconnect_device(struct scsi_id_instance_data
*scsi_id
)
1353 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1357 SBP2_DEBUG("sbp2_reconnect_device");
1360 * Set-up reconnect ORB
1362 scsi_id
->reconnect_orb
->reserved1
= 0x0;
1363 scsi_id
->reconnect_orb
->reserved2
= 0x0;
1364 scsi_id
->reconnect_orb
->reserved3
= 0x0;
1365 scsi_id
->reconnect_orb
->reserved4
= 0x0;
1367 scsi_id
->reconnect_orb
->login_ID_misc
= ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST
);
1368 scsi_id
->reconnect_orb
->login_ID_misc
|=
1369 ORB_SET_LOGIN_ID(scsi_id
->login_response
->length_login_ID
);
1371 /* Notify us when complete */
1372 scsi_id
->reconnect_orb
->login_ID_misc
|= ORB_SET_NOTIFY(1);
1374 scsi_id
->reconnect_orb
->reserved5
= 0x0;
1375 scsi_id
->reconnect_orb
->status_FIFO_lo
= SBP2_STATUS_FIFO_ADDRESS_LO
+
1376 SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id
->ud
->id
);
1377 scsi_id
->reconnect_orb
->status_FIFO_hi
=
1378 (ORB_SET_NODE_ID(hi
->host
->node_id
) | SBP2_STATUS_FIFO_ADDRESS_HI
);
1381 * Byte swap ORB if necessary
1383 sbp2util_cpu_to_be32_buffer(scsi_id
->reconnect_orb
, sizeof(struct sbp2_reconnect_orb
));
1385 sbp2util_packet_dump(scsi_id
->reconnect_orb
, sizeof(struct sbp2_reconnect_orb
),
1386 "sbp2 reconnect orb", scsi_id
->reconnect_orb_dma
);
1389 * Initialize status fifo
1391 memset(&scsi_id
->status_block
, 0, sizeof(struct sbp2_status_block
));
1394 * Ok, let's write to the target's management agent register
1396 data
[0] = ORB_SET_NODE_ID(hi
->host
->node_id
);
1397 data
[1] = scsi_id
->reconnect_orb_dma
;
1398 sbp2util_cpu_to_be32_buffer(data
, 8);
1400 atomic_set(&scsi_id
->sbp2_login_complete
, 0);
1402 error
= hpsb_node_write(scsi_id
->ne
,
1403 scsi_id
->sbp2_management_agent_addr
, data
, 8);
1408 * Wait for reconnect status (up to 1 second)...
1410 if (sbp2util_down_timeout(&scsi_id
->sbp2_login_complete
, HZ
)) {
1411 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out");
1416 * Sanity. Make sure status returned matches reconnect orb.
1418 if (scsi_id
->status_block
.ORB_offset_lo
!= scsi_id
->reconnect_orb_dma
) {
1419 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out");
1426 if (STATUS_GET_RESP(scsi_id
->status_block
.ORB_offset_hi_misc
) ||
1427 STATUS_GET_DEAD_BIT(scsi_id
->status_block
.ORB_offset_hi_misc
) ||
1428 STATUS_GET_SBP_STATUS(scsi_id
->status_block
.ORB_offset_hi_misc
)) {
1430 SBP2_ERR("Error reconnecting to SBP-2 device - reconnect failed");
1434 HPSB_DEBUG("Reconnected to SBP-2 device");
1441 * This function is called in order to set the busy timeout (number of
1442 * retries to attempt) on the sbp2 device.
1444 static int sbp2_set_busy_timeout(struct scsi_id_instance_data
*scsi_id
)
1448 SBP2_DEBUG("sbp2_set_busy_timeout");
1451 * Ok, let's write to the target's busy timeout register
1453 data
= cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE
);
1455 if (hpsb_node_write(scsi_id
->ne
, SBP2_BUSY_TIMEOUT_ADDRESS
, &data
, 4)) {
1456 SBP2_ERR("sbp2_set_busy_timeout error");
1463 * This function is called to parse sbp2 device's config rom unit
1464 * directory. Used to determine things like sbp2 management agent offset,
1465 * and command set used (SCSI or RBC).
1467 static void sbp2_parse_unit_directory(struct scsi_id_instance_data
*scsi_id
,
1468 struct unit_directory
*ud
)
1470 struct csr1212_keyval
*kv
;
1471 struct csr1212_dentry
*dentry
;
1472 u64 management_agent_addr
;
1473 u32 command_set_spec_id
, command_set
, unit_characteristics
,
1474 firmware_revision
, workarounds
;
1477 SBP2_DEBUG("sbp2_parse_unit_directory");
1479 management_agent_addr
= 0x0;
1480 command_set_spec_id
= 0x0;
1482 unit_characteristics
= 0x0;
1483 firmware_revision
= 0x0;
1485 /* Handle different fields in the unit directory, based on keys */
1486 csr1212_for_each_dir_entry(ud
->ne
->csr
, kv
, ud
->ud_kv
, dentry
) {
1487 switch (kv
->key
.id
) {
1488 case CSR1212_KV_ID_DEPENDENT_INFO
:
1489 if (kv
->key
.type
== CSR1212_KV_TYPE_CSR_OFFSET
) {
1490 /* Save off the management agent address */
1491 management_agent_addr
=
1492 CSR1212_REGISTER_SPACE_BASE
+
1493 (kv
->value
.csr_offset
<< 2);
1495 SBP2_DEBUG("sbp2_management_agent_addr = %x",
1496 (unsigned int)management_agent_addr
);
1497 } else if (kv
->key
.type
== CSR1212_KV_TYPE_IMMEDIATE
) {
1499 ORB_SET_LUN(kv
->value
.immediate
);
1503 case SBP2_COMMAND_SET_SPEC_ID_KEY
:
1504 /* Command spec organization */
1505 command_set_spec_id
= kv
->value
.immediate
;
1506 SBP2_DEBUG("sbp2_command_set_spec_id = %x",
1507 (unsigned int)command_set_spec_id
);
1510 case SBP2_COMMAND_SET_KEY
:
1511 /* Command set used by sbp2 device */
1512 command_set
= kv
->value
.immediate
;
1513 SBP2_DEBUG("sbp2_command_set = %x",
1514 (unsigned int)command_set
);
1517 case SBP2_UNIT_CHARACTERISTICS_KEY
:
1519 * Unit characterisitcs (orb related stuff
1520 * that I'm not yet paying attention to)
1522 unit_characteristics
= kv
->value
.immediate
;
1523 SBP2_DEBUG("sbp2_unit_characteristics = %x",
1524 (unsigned int)unit_characteristics
);
1527 case SBP2_FIRMWARE_REVISION_KEY
:
1528 /* Firmware revision */
1529 firmware_revision
= kv
->value
.immediate
;
1530 if (force_inquiry_hack
)
1531 SBP2_INFO("sbp2_firmware_revision = %x",
1532 (unsigned int)firmware_revision
);
1534 SBP2_DEBUG("sbp2_firmware_revision = %x",
1535 (unsigned int)firmware_revision
);
1543 /* This is the start of our broken device checking. We try to hack
1544 * around oddities and known defects. */
1547 /* If the vendor id is 0xa0b8 (Symbios vendor id), then we have a
1548 * bridge with 128KB max transfer size limitation. For sanity, we
1549 * only voice this when the current max_sectors setting
1550 * exceeds the 128k limit. By default, that is not the case.
1552 * It would be really nice if we could detect this before the scsi
1553 * host gets initialized. That way we can down-force the
1554 * max_sectors to account for it. That is not currently
1556 if ((firmware_revision
& 0xffff00) ==
1557 SBP2_128KB_BROKEN_FIRMWARE
&&
1558 (max_sectors
* 512) > (128*1024)) {
1559 SBP2_WARN("Node " NODE_BUS_FMT
": Bridge only supports 128KB max transfer size.",
1560 NODE_BUS_ARGS(ud
->ne
->host
, ud
->ne
->nodeid
));
1561 SBP2_WARN("WARNING: Current max_sectors setting is larger than 128KB (%d sectors)!",
1563 workarounds
|= SBP2_BREAKAGE_128K_MAX_TRANSFER
;
1566 /* Check for a blacklisted set of devices that require us to force
1567 * a 36 byte host inquiry. This can be overriden as a module param
1568 * (to force all hosts). */
1569 for (i
= 0; i
< NUM_BROKEN_INQUIRY_DEVS
; i
++) {
1570 if ((firmware_revision
& 0xffff00) ==
1571 sbp2_broken_inquiry_list
[i
]) {
1572 SBP2_WARN("Node " NODE_BUS_FMT
": Using 36byte inquiry workaround",
1573 NODE_BUS_ARGS(ud
->ne
->host
, ud
->ne
->nodeid
));
1574 workarounds
|= SBP2_BREAKAGE_INQUIRY_HACK
;
1575 break; /* No need to continue. */
1579 /* If this is a logical unit directory entry, process the parent
1580 * to get the values. */
1581 if (ud
->flags
& UNIT_DIRECTORY_LUN_DIRECTORY
) {
1582 struct unit_directory
*parent_ud
=
1583 container_of(ud
->device
.parent
, struct unit_directory
, device
);
1584 sbp2_parse_unit_directory(scsi_id
, parent_ud
);
1586 scsi_id
->sbp2_management_agent_addr
= management_agent_addr
;
1587 scsi_id
->sbp2_command_set_spec_id
= command_set_spec_id
;
1588 scsi_id
->sbp2_command_set
= command_set
;
1589 scsi_id
->sbp2_unit_characteristics
= unit_characteristics
;
1590 scsi_id
->sbp2_firmware_revision
= firmware_revision
;
1591 scsi_id
->workarounds
= workarounds
;
1592 if (ud
->flags
& UNIT_DIRECTORY_HAS_LUN
)
1593 scsi_id
->sbp2_lun
= ORB_SET_LUN(ud
->lun
);
1598 * This function is called in order to determine the max speed and packet
1599 * size we can use in our ORBs. Note, that we (the driver and host) only
1600 * initiate the transaction. The SBP-2 device actually transfers the data
1601 * (by reading from the DMA area we tell it). This means that the SBP-2
1602 * device decides the actual maximum data it can transfer. We just tell it
1603 * the speed that it needs to use, and the max_rec the host supports, and
1604 * it takes care of the rest.
1606 static int sbp2_max_speed_and_size(struct scsi_id_instance_data
*scsi_id
)
1608 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1610 SBP2_DEBUG("sbp2_max_speed_and_size");
1612 /* Initial setting comes from the hosts speed map */
1613 scsi_id
->speed_code
=
1614 hi
->host
->speed_map
[NODEID_TO_NODE(hi
->host
->node_id
) * 64 +
1615 NODEID_TO_NODE(scsi_id
->ne
->nodeid
)];
1617 /* Bump down our speed if the user requested it */
1618 if (scsi_id
->speed_code
> max_speed
) {
1619 scsi_id
->speed_code
= max_speed
;
1620 SBP2_ERR("Forcing SBP-2 max speed down to %s",
1621 hpsb_speedto_str
[scsi_id
->speed_code
]);
1624 /* Payload size is the lesser of what our speed supports and what
1625 * our host supports. */
1626 scsi_id
->max_payload_size
=
1627 min(sbp2_speedto_max_payload
[scsi_id
->speed_code
],
1628 (u8
) (hi
->host
->csr
.max_rec
- 1));
1630 HPSB_DEBUG("Node " NODE_BUS_FMT
": Max speed [%s] - Max payload [%u]",
1631 NODE_BUS_ARGS(hi
->host
, scsi_id
->ne
->nodeid
),
1632 hpsb_speedto_str
[scsi_id
->speed_code
],
1633 1 << ((u32
) scsi_id
->max_payload_size
+ 2));
1639 * This function is called in order to perform a SBP-2 agent reset.
1641 static int sbp2_agent_reset(struct scsi_id_instance_data
*scsi_id
, int wait
)
1647 SBP2_DEBUG("sbp2_agent_reset");
1650 * Ok, let's write to the target's management agent register
1652 data
= ntohl(SBP2_AGENT_RESET_DATA
);
1653 addr
= scsi_id
->sbp2_command_block_agent_addr
+ SBP2_AGENT_RESET_OFFSET
;
1656 retval
= hpsb_node_write(scsi_id
->ne
, addr
, &data
, 4);
1658 retval
= sbp2util_node_write_no_wait(scsi_id
->ne
, addr
, &data
, 4);
1661 SBP2_ERR("hpsb_node_write failed.\n");
1666 * Need to make sure orb pointer is written on next command
1668 scsi_id
->last_orb
= NULL
;
1673 static void sbp2_prep_command_orb_sg(struct sbp2_command_orb
*orb
,
1674 struct sbp2scsi_host_info
*hi
,
1675 struct sbp2_command_info
*command
,
1676 unsigned int scsi_use_sg
,
1677 struct scatterlist
*sgpnt
,
1679 enum dma_data_direction dma_dir
)
1681 command
->dma_dir
= dma_dir
;
1682 orb
->data_descriptor_hi
= ORB_SET_NODE_ID(hi
->host
->node_id
);
1683 orb
->misc
|= ORB_SET_DIRECTION(orb_direction
);
1685 /* Special case if only one element (and less than 64KB in size) */
1686 if ((scsi_use_sg
== 1) &&
1687 (sgpnt
[0].length
<= SBP2_MAX_SG_ELEMENT_LENGTH
)) {
1689 SBP2_DEBUG("Only one s/g element");
1690 command
->dma_size
= sgpnt
[0].length
;
1691 command
->dma_type
= CMD_DMA_PAGE
;
1692 command
->cmd_dma
= pci_map_page(hi
->host
->pdev
,
1697 SBP2_DMA_ALLOC("single page scatter element");
1699 orb
->data_descriptor_lo
= command
->cmd_dma
;
1700 orb
->misc
|= ORB_SET_DATA_SIZE(command
->dma_size
);
1703 struct sbp2_unrestricted_page_table
*sg_element
=
1704 &command
->scatter_gather_element
[0];
1705 u32 sg_count
, sg_len
;
1707 int i
, count
= pci_map_sg(hi
->host
->pdev
, sgpnt
, scsi_use_sg
,
1710 SBP2_DMA_ALLOC("scatter list");
1712 command
->dma_size
= scsi_use_sg
;
1713 command
->sge_buffer
= sgpnt
;
1715 /* use page tables (s/g) */
1716 orb
->misc
|= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1717 orb
->data_descriptor_lo
= command
->sge_dma
;
1720 * Loop through and fill out our sbp-2 page tables
1721 * (and split up anything too large)
1723 for (i
= 0, sg_count
= 0 ; i
< count
; i
++, sgpnt
++) {
1724 sg_len
= sg_dma_len(sgpnt
);
1725 sg_addr
= sg_dma_address(sgpnt
);
1727 sg_element
[sg_count
].segment_base_lo
= sg_addr
;
1728 if (sg_len
> SBP2_MAX_SG_ELEMENT_LENGTH
) {
1729 sg_element
[sg_count
].length_segment_base_hi
=
1730 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH
);
1731 sg_addr
+= SBP2_MAX_SG_ELEMENT_LENGTH
;
1732 sg_len
-= SBP2_MAX_SG_ELEMENT_LENGTH
;
1734 sg_element
[sg_count
].length_segment_base_hi
=
1735 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len
);
1742 /* Number of page table (s/g) elements */
1743 orb
->misc
|= ORB_SET_DATA_SIZE(sg_count
);
1745 sbp2util_packet_dump(sg_element
,
1746 (sizeof(struct sbp2_unrestricted_page_table
)) * sg_count
,
1747 "sbp2 s/g list", command
->sge_dma
);
1749 /* Byte swap page tables if necessary */
1750 sbp2util_cpu_to_be32_buffer(sg_element
,
1751 (sizeof(struct sbp2_unrestricted_page_table
)) *
1756 static void sbp2_prep_command_orb_no_sg(struct sbp2_command_orb
*orb
,
1757 struct sbp2scsi_host_info
*hi
,
1758 struct sbp2_command_info
*command
,
1759 struct scatterlist
*sgpnt
,
1761 unsigned int scsi_request_bufflen
,
1762 void *scsi_request_buffer
,
1763 enum dma_data_direction dma_dir
)
1765 command
->dma_dir
= dma_dir
;
1766 command
->dma_size
= scsi_request_bufflen
;
1767 command
->dma_type
= CMD_DMA_SINGLE
;
1768 command
->cmd_dma
= pci_map_single(hi
->host
->pdev
, scsi_request_buffer
,
1769 command
->dma_size
, command
->dma_dir
);
1770 orb
->data_descriptor_hi
= ORB_SET_NODE_ID(hi
->host
->node_id
);
1771 orb
->misc
|= ORB_SET_DIRECTION(orb_direction
);
1773 SBP2_DMA_ALLOC("single bulk");
1776 * Handle case where we get a command w/o s/g enabled (but
1777 * check for transfers larger than 64K)
1779 if (scsi_request_bufflen
<= SBP2_MAX_SG_ELEMENT_LENGTH
) {
1781 orb
->data_descriptor_lo
= command
->cmd_dma
;
1782 orb
->misc
|= ORB_SET_DATA_SIZE(scsi_request_bufflen
);
1785 struct sbp2_unrestricted_page_table
*sg_element
=
1786 &command
->scatter_gather_element
[0];
1787 u32 sg_count
, sg_len
;
1791 * Need to turn this into page tables, since the
1792 * buffer is too large.
1794 orb
->data_descriptor_lo
= command
->sge_dma
;
1796 /* Use page tables (s/g) */
1797 orb
->misc
|= ORB_SET_PAGE_TABLE_PRESENT(0x1);
1800 * fill out our sbp-2 page tables (and split up
1804 sg_len
= scsi_request_bufflen
;
1805 sg_addr
= command
->cmd_dma
;
1807 sg_element
[sg_count
].segment_base_lo
= sg_addr
;
1808 if (sg_len
> SBP2_MAX_SG_ELEMENT_LENGTH
) {
1809 sg_element
[sg_count
].length_segment_base_hi
=
1810 PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH
);
1811 sg_addr
+= SBP2_MAX_SG_ELEMENT_LENGTH
;
1812 sg_len
-= SBP2_MAX_SG_ELEMENT_LENGTH
;
1814 sg_element
[sg_count
].length_segment_base_hi
=
1815 PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len
);
1821 /* Number of page table (s/g) elements */
1822 orb
->misc
|= ORB_SET_DATA_SIZE(sg_count
);
1824 sbp2util_packet_dump(sg_element
,
1825 (sizeof(struct sbp2_unrestricted_page_table
)) * sg_count
,
1826 "sbp2 s/g list", command
->sge_dma
);
1828 /* Byte swap page tables if necessary */
1829 sbp2util_cpu_to_be32_buffer(sg_element
,
1830 (sizeof(struct sbp2_unrestricted_page_table
)) *
1836 * This function is called to create the actual command orb and s/g list
1837 * out of the scsi command itself.
1839 static void sbp2_create_command_orb(struct scsi_id_instance_data
*scsi_id
,
1840 struct sbp2_command_info
*command
,
1842 unsigned int scsi_use_sg
,
1843 unsigned int scsi_request_bufflen
,
1844 void *scsi_request_buffer
,
1845 enum dma_data_direction dma_dir
)
1847 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1848 struct scatterlist
*sgpnt
= (struct scatterlist
*)scsi_request_buffer
;
1849 struct sbp2_command_orb
*command_orb
= &command
->command_orb
;
1853 * Set-up our command ORB..
1855 * NOTE: We're doing unrestricted page tables (s/g), as this is
1856 * best performance (at least with the devices I have). This means
1857 * that data_size becomes the number of s/g elements, and
1858 * page_size should be zero (for unrestricted).
1860 command_orb
->next_ORB_hi
= ORB_SET_NULL_PTR(1);
1861 command_orb
->next_ORB_lo
= 0x0;
1862 command_orb
->misc
= ORB_SET_MAX_PAYLOAD(scsi_id
->max_payload_size
);
1863 command_orb
->misc
|= ORB_SET_SPEED(scsi_id
->speed_code
);
1864 command_orb
->misc
|= ORB_SET_NOTIFY(1); /* Notify us when complete */
1866 if (dma_dir
== DMA_NONE
)
1867 orb_direction
= ORB_DIRECTION_NO_DATA_TRANSFER
;
1868 else if (dma_dir
== DMA_TO_DEVICE
&& scsi_request_bufflen
)
1869 orb_direction
= ORB_DIRECTION_WRITE_TO_MEDIA
;
1870 else if (dma_dir
== DMA_FROM_DEVICE
&& scsi_request_bufflen
)
1871 orb_direction
= ORB_DIRECTION_READ_FROM_MEDIA
;
1873 SBP2_WARN("Falling back to DMA_NONE");
1874 orb_direction
= ORB_DIRECTION_NO_DATA_TRANSFER
;
1877 /* Set-up our pagetable stuff */
1878 if (orb_direction
== ORB_DIRECTION_NO_DATA_TRANSFER
) {
1879 SBP2_DEBUG("No data transfer");
1880 command_orb
->data_descriptor_hi
= 0x0;
1881 command_orb
->data_descriptor_lo
= 0x0;
1882 command_orb
->misc
|= ORB_SET_DIRECTION(1);
1883 } else if (scsi_use_sg
) {
1884 SBP2_DEBUG("Use scatter/gather");
1885 sbp2_prep_command_orb_sg(command_orb
, hi
, command
, scsi_use_sg
,
1886 sgpnt
, orb_direction
, dma_dir
);
1888 SBP2_DEBUG("No scatter/gather");
1889 sbp2_prep_command_orb_no_sg(command_orb
, hi
, command
, sgpnt
,
1890 orb_direction
, scsi_request_bufflen
,
1891 scsi_request_buffer
, dma_dir
);
1894 /* Byte swap command ORB if necessary */
1895 sbp2util_cpu_to_be32_buffer(command_orb
, sizeof(struct sbp2_command_orb
));
1897 /* Put our scsi command in the command ORB */
1898 memset(command_orb
->cdb
, 0, 12);
1899 memcpy(command_orb
->cdb
, scsi_cmd
, COMMAND_SIZE(*scsi_cmd
));
1903 * This function is called in order to begin a regular SBP-2 command.
1905 static int sbp2_link_orb_command(struct scsi_id_instance_data
*scsi_id
,
1906 struct sbp2_command_info
*command
)
1908 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
1909 struct sbp2_command_orb
*command_orb
= &command
->command_orb
;
1910 struct node_entry
*ne
= scsi_id
->ne
;
1913 outstanding_orb_incr
;
1914 SBP2_ORB_DEBUG("sending command orb %p, total orbs = %x",
1915 command_orb
, global_outstanding_command_orbs
);
1917 pci_dma_sync_single_for_device(hi
->host
->pdev
, command
->command_orb_dma
,
1918 sizeof(struct sbp2_command_orb
),
1919 PCI_DMA_BIDIRECTIONAL
);
1920 pci_dma_sync_single_for_device(hi
->host
->pdev
, command
->sge_dma
,
1921 sizeof(command
->scatter_gather_element
),
1922 PCI_DMA_BIDIRECTIONAL
);
1924 * Check to see if there are any previous orbs to use
1926 if (scsi_id
->last_orb
== NULL
) {
1930 * Ok, let's write to the target's management agent register
1932 addr
= scsi_id
->sbp2_command_block_agent_addr
+ SBP2_ORB_POINTER_OFFSET
;
1933 data
[0] = ORB_SET_NODE_ID(hi
->host
->node_id
);
1934 data
[1] = command
->command_orb_dma
;
1935 sbp2util_cpu_to_be32_buffer(data
, 8);
1937 SBP2_ORB_DEBUG("write command agent, command orb %p", command_orb
);
1939 if (sbp2util_node_write_no_wait(ne
, addr
, data
, 8) < 0) {
1940 SBP2_ERR("sbp2util_node_write_no_wait failed.\n");
1944 SBP2_ORB_DEBUG("write command agent complete");
1946 scsi_id
->last_orb
= command_orb
;
1947 scsi_id
->last_orb_dma
= command
->command_orb_dma
;
1953 * We have an orb already sent (maybe or maybe not
1954 * processed) that we can append this orb to. So do so,
1955 * and ring the doorbell. Have to be very careful
1956 * modifying these next orb pointers, as they are accessed
1957 * both by the sbp2 device and us.
1959 scsi_id
->last_orb
->next_ORB_lo
=
1960 cpu_to_be32(command
->command_orb_dma
);
1961 /* Tells hardware that this pointer is valid */
1962 scsi_id
->last_orb
->next_ORB_hi
= 0x0;
1963 pci_dma_sync_single_for_device(hi
->host
->pdev
,
1964 scsi_id
->last_orb_dma
,
1965 sizeof(struct sbp2_command_orb
),
1966 PCI_DMA_BIDIRECTIONAL
);
1971 data
= cpu_to_be32(command
->command_orb_dma
);
1972 addr
= scsi_id
->sbp2_command_block_agent_addr
+ SBP2_DOORBELL_OFFSET
;
1974 SBP2_ORB_DEBUG("ring doorbell, command orb %p", command_orb
);
1976 if (sbp2util_node_write_no_wait(ne
, addr
, &data
, 4) < 0) {
1977 SBP2_ERR("sbp2util_node_write_no_wait failed");
1981 scsi_id
->last_orb
= command_orb
;
1982 scsi_id
->last_orb_dma
= command
->command_orb_dma
;
1989 * This function is called in order to begin a regular SBP-2 command.
1991 static int sbp2_send_command(struct scsi_id_instance_data
*scsi_id
,
1992 struct scsi_cmnd
*SCpnt
,
1993 void (*done
)(struct scsi_cmnd
*))
1995 unchar
*cmd
= (unchar
*) SCpnt
->cmnd
;
1996 unsigned int request_bufflen
= SCpnt
->request_bufflen
;
1997 struct sbp2_command_info
*command
;
1999 SBP2_DEBUG("sbp2_send_command");
2000 #if (CONFIG_IEEE1394_SBP2_DEBUG >= 2) || defined(CONFIG_IEEE1394_SBP2_PACKET_DUMP)
2001 printk("[scsi command]\n ");
2002 scsi_print_command(SCpnt
);
2004 SBP2_DEBUG("SCSI transfer size = %x", request_bufflen
);
2005 SBP2_DEBUG("SCSI s/g elements = %x", (unsigned int)SCpnt
->use_sg
);
2008 * Allocate a command orb and s/g structure
2010 command
= sbp2util_allocate_command_orb(scsi_id
, SCpnt
, done
);
2016 * The scsi stack sends down a request_bufflen which does not match the
2017 * length field in the scsi cdb. This causes some sbp2 devices to
2018 * reject this inquiry command. Fix the request_bufflen.
2020 if (*cmd
== INQUIRY
) {
2021 if (force_inquiry_hack
|| scsi_id
->workarounds
& SBP2_BREAKAGE_INQUIRY_HACK
)
2022 request_bufflen
= cmd
[4] = 0x24;
2024 request_bufflen
= cmd
[4];
2028 * Now actually fill in the comamnd orb and sbp2 s/g list
2030 sbp2_create_command_orb(scsi_id
, command
, cmd
, SCpnt
->use_sg
,
2031 request_bufflen
, SCpnt
->request_buffer
,
2032 SCpnt
->sc_data_direction
);
2034 sbp2util_packet_dump(&command
->command_orb
, sizeof(struct sbp2_command_orb
),
2035 "sbp2 command orb", command
->command_orb_dma
);
2038 * Initialize status fifo
2040 memset(&scsi_id
->status_block
, 0, sizeof(struct sbp2_status_block
));
2043 * Link up the orb, and ring the doorbell if needed
2045 sbp2_link_orb_command(scsi_id
, command
);
2051 * Translates SBP-2 status into SCSI sense data for check conditions
2053 static unsigned int sbp2_status_to_sense_data(unchar
*sbp2_status
, unchar
*sense_data
)
2055 SBP2_DEBUG("sbp2_status_to_sense_data");
2058 * Ok, it's pretty ugly... ;-)
2060 sense_data
[0] = 0x70;
2061 sense_data
[1] = 0x0;
2062 sense_data
[2] = sbp2_status
[9];
2063 sense_data
[3] = sbp2_status
[12];
2064 sense_data
[4] = sbp2_status
[13];
2065 sense_data
[5] = sbp2_status
[14];
2066 sense_data
[6] = sbp2_status
[15];
2068 sense_data
[8] = sbp2_status
[16];
2069 sense_data
[9] = sbp2_status
[17];
2070 sense_data
[10] = sbp2_status
[18];
2071 sense_data
[11] = sbp2_status
[19];
2072 sense_data
[12] = sbp2_status
[10];
2073 sense_data
[13] = sbp2_status
[11];
2074 sense_data
[14] = sbp2_status
[20];
2075 sense_data
[15] = sbp2_status
[21];
2077 return sbp2_status
[8] & 0x3f; /* return scsi status */
2081 * This function is called after a command is completed, in order to do any necessary SBP-2
2082 * response data translations for the SCSI stack
2084 static void sbp2_check_sbp2_response(struct scsi_id_instance_data
*scsi_id
,
2085 struct scsi_cmnd
*SCpnt
)
2087 u8
*scsi_buf
= SCpnt
->request_buffer
;
2089 SBP2_DEBUG("sbp2_check_sbp2_response");
2091 if (SCpnt
->cmnd
[0] == INQUIRY
&& (SCpnt
->cmnd
[1] & 3) == 0) {
2093 * Make sure data length is ok. Minimum length is 36 bytes
2095 if (scsi_buf
[4] == 0) {
2096 scsi_buf
[4] = 36 - 5;
2100 * Fix ansi revision and response data format
2103 scsi_buf
[3] = (scsi_buf
[3] & 0xf0) | 2;
2108 * This function deals with status writes from the SBP-2 device
2110 static int sbp2_handle_status_write(struct hpsb_host
*host
, int nodeid
, int destid
,
2111 quadlet_t
*data
, u64 addr
, size_t length
, u16 fl
)
2113 struct sbp2scsi_host_info
*hi
;
2114 struct scsi_id_instance_data
*scsi_id
= NULL
, *scsi_id_tmp
;
2116 struct scsi_cmnd
*SCpnt
= NULL
;
2117 u32 scsi_status
= SBP2_SCSI_STATUS_GOOD
;
2118 struct sbp2_command_info
*command
;
2119 unsigned long flags
;
2121 SBP2_DEBUG("sbp2_handle_status_write");
2123 sbp2util_packet_dump(data
, length
, "sbp2 status write by device", (u32
)addr
);
2126 SBP2_ERR("host is NULL - this is bad!");
2127 return RCODE_ADDRESS_ERROR
;
2130 hi
= hpsb_get_hostinfo(&sbp2_highlevel
, host
);
2133 SBP2_ERR("host info is NULL - this is bad!");
2134 return RCODE_ADDRESS_ERROR
;
2138 * Find our scsi_id structure by looking at the status fifo address written to by
2141 id
= SBP2_STATUS_FIFO_OFFSET_TO_ENTRY((u32
)(addr
- SBP2_STATUS_FIFO_ADDRESS
));
2142 list_for_each_entry(scsi_id_tmp
, &hi
->scsi_ids
, scsi_list
) {
2143 if (scsi_id_tmp
->ne
->nodeid
== nodeid
&& scsi_id_tmp
->ud
->id
== id
) {
2144 scsi_id
= scsi_id_tmp
;
2150 SBP2_ERR("scsi_id is NULL - device is gone?");
2151 return RCODE_ADDRESS_ERROR
;
2155 * Put response into scsi_id status fifo...
2157 memcpy(&scsi_id
->status_block
, data
, length
);
2160 * Byte swap first two quadlets (8 bytes) of status for processing
2162 sbp2util_be32_to_cpu_buffer(&scsi_id
->status_block
, 8);
2165 * Handle command ORB status here if necessary. First, need to match status with command.
2167 command
= sbp2util_find_command_for_orb(scsi_id
, scsi_id
->status_block
.ORB_offset_lo
);
2170 SBP2_DEBUG("Found status for command ORB");
2171 pci_dma_sync_single_for_cpu(hi
->host
->pdev
, command
->command_orb_dma
,
2172 sizeof(struct sbp2_command_orb
),
2173 PCI_DMA_BIDIRECTIONAL
);
2174 pci_dma_sync_single_for_cpu(hi
->host
->pdev
, command
->sge_dma
,
2175 sizeof(command
->scatter_gather_element
),
2176 PCI_DMA_BIDIRECTIONAL
);
2178 SBP2_ORB_DEBUG("matched command orb %p", &command
->command_orb
);
2179 outstanding_orb_decr
;
2182 * Matched status with command, now grab scsi command pointers and check status
2184 SCpnt
= command
->Current_SCpnt
;
2185 sbp2util_mark_command_completed(scsi_id
, command
);
2190 * See if the target stored any scsi status information
2192 if (STATUS_GET_LENGTH(scsi_id
->status_block
.ORB_offset_hi_misc
) > 1) {
2194 * Translate SBP-2 status to SCSI sense data
2196 SBP2_DEBUG("CHECK CONDITION");
2197 scsi_status
= sbp2_status_to_sense_data((unchar
*)&scsi_id
->status_block
, SCpnt
->sense_buffer
);
2201 * Check to see if the dead bit is set. If so, we'll have to initiate
2202 * a fetch agent reset.
2204 if (STATUS_GET_DEAD_BIT(scsi_id
->status_block
.ORB_offset_hi_misc
)) {
2207 * Initiate a fetch agent reset.
2209 SBP2_DEBUG("Dead bit set - initiating fetch agent reset");
2210 sbp2_agent_reset(scsi_id
, 0);
2213 SBP2_ORB_DEBUG("completing command orb %p", &command
->command_orb
);
2217 * Check here to see if there are no commands in-use. If there are none, we can
2218 * null out last orb so that next time around we write directly to the orb pointer...
2219 * Quick start saves one 1394 bus transaction.
2221 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
2222 if (list_empty(&scsi_id
->sbp2_command_orb_inuse
)) {
2223 scsi_id
->last_orb
= NULL
;
2225 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
2230 * It's probably a login/logout/reconnect status.
2232 if ((scsi_id
->login_orb_dma
== scsi_id
->status_block
.ORB_offset_lo
) ||
2233 (scsi_id
->query_logins_orb_dma
== scsi_id
->status_block
.ORB_offset_lo
) ||
2234 (scsi_id
->reconnect_orb_dma
== scsi_id
->status_block
.ORB_offset_lo
) ||
2235 (scsi_id
->logout_orb_dma
== scsi_id
->status_block
.ORB_offset_lo
)) {
2236 atomic_set(&scsi_id
->sbp2_login_complete
, 1);
2242 /* Complete the SCSI command. */
2243 SBP2_DEBUG("Completing SCSI command");
2244 sbp2scsi_complete_command(scsi_id
, scsi_status
, SCpnt
,
2245 command
->Current_done
);
2246 SBP2_ORB_DEBUG("command orb completed");
2249 return RCODE_COMPLETE
;
2252 /**************************************
2253 * SCSI interface related section
2254 **************************************/
2257 * This routine is the main request entry routine for doing I/O. It is
2258 * called from the scsi stack directly.
2260 static int sbp2scsi_queuecommand(struct scsi_cmnd
*SCpnt
,
2261 void (*done
)(struct scsi_cmnd
*))
2263 struct scsi_id_instance_data
*scsi_id
=
2264 (struct scsi_id_instance_data
*)SCpnt
->device
->host
->hostdata
[0];
2265 struct sbp2scsi_host_info
*hi
;
2266 int result
= DID_NO_CONNECT
<< 16;
2268 SBP2_DEBUG("sbp2scsi_queuecommand");
2270 if (!sbp2util_node_is_available(scsi_id
))
2276 SBP2_ERR("sbp2scsi_host_info is NULL - this is bad!");
2281 * Until we handle multiple luns, just return selection time-out
2282 * to any IO directed at non-zero LUNs
2284 if (SCpnt
->device
->lun
)
2288 * Check for request sense command, and handle it here
2289 * (autorequest sense)
2291 if (SCpnt
->cmnd
[0] == REQUEST_SENSE
) {
2292 SBP2_DEBUG("REQUEST_SENSE");
2293 memcpy(SCpnt
->request_buffer
, SCpnt
->sense_buffer
, SCpnt
->request_bufflen
);
2294 memset(SCpnt
->sense_buffer
, 0, sizeof(SCpnt
->sense_buffer
));
2295 sbp2scsi_complete_command(scsi_id
, SBP2_SCSI_STATUS_GOOD
, SCpnt
, done
);
2300 * Check to see if we are in the middle of a bus reset.
2302 if (!hpsb_node_entry_valid(scsi_id
->ne
)) {
2303 SBP2_ERR("Bus reset in progress - rejecting command");
2304 result
= DID_BUS_BUSY
<< 16;
2309 * Bidirectional commands are not yet implemented,
2310 * and unknown transfer direction not handled.
2312 if (SCpnt
->sc_data_direction
== DMA_BIDIRECTIONAL
) {
2313 SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command");
2314 result
= DID_ERROR
<< 16;
2319 * Try and send our SCSI command
2321 if (sbp2_send_command(scsi_id
, SCpnt
, done
)) {
2322 SBP2_ERR("Error sending SCSI command");
2323 sbp2scsi_complete_command(scsi_id
, SBP2_SCSI_STATUS_SELECTION_TIMEOUT
,
2329 SCpnt
->result
= result
;
2335 * This function is called in order to complete all outstanding SBP-2
2336 * commands (in case of resets, etc.).
2338 static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data
*scsi_id
,
2341 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
2342 struct list_head
*lh
;
2343 struct sbp2_command_info
*command
;
2344 unsigned long flags
;
2346 SBP2_DEBUG("sbp2scsi_complete_all_commands");
2348 spin_lock_irqsave(&scsi_id
->sbp2_command_orb_lock
, flags
);
2349 while (!list_empty(&scsi_id
->sbp2_command_orb_inuse
)) {
2350 SBP2_DEBUG("Found pending command to complete");
2351 lh
= scsi_id
->sbp2_command_orb_inuse
.next
;
2352 command
= list_entry(lh
, struct sbp2_command_info
, list
);
2353 pci_dma_sync_single_for_cpu(hi
->host
->pdev
, command
->command_orb_dma
,
2354 sizeof(struct sbp2_command_orb
),
2355 PCI_DMA_BIDIRECTIONAL
);
2356 pci_dma_sync_single_for_cpu(hi
->host
->pdev
, command
->sge_dma
,
2357 sizeof(command
->scatter_gather_element
),
2358 PCI_DMA_BIDIRECTIONAL
);
2359 sbp2util_mark_command_completed(scsi_id
, command
);
2360 if (command
->Current_SCpnt
) {
2361 command
->Current_SCpnt
->result
= status
<< 16;
2362 command
->Current_done(command
->Current_SCpnt
);
2365 spin_unlock_irqrestore(&scsi_id
->sbp2_command_orb_lock
, flags
);
2371 * This function is called in order to complete a regular SBP-2 command.
2373 * This can be called in interrupt context.
2375 static void sbp2scsi_complete_command(struct scsi_id_instance_data
*scsi_id
,
2376 u32 scsi_status
, struct scsi_cmnd
*SCpnt
,
2377 void (*done
)(struct scsi_cmnd
*))
2379 SBP2_DEBUG("sbp2scsi_complete_command");
2385 SBP2_ERR("SCpnt is NULL");
2390 * If a bus reset is in progress and there was an error, don't
2391 * complete the command, just let it get retried at the end of the
2394 if (!hpsb_node_entry_valid(scsi_id
->ne
)
2395 && (scsi_status
!= SBP2_SCSI_STATUS_GOOD
)) {
2396 SBP2_ERR("Bus reset in progress - retry command later");
2401 * Switch on scsi status
2403 switch (scsi_status
) {
2404 case SBP2_SCSI_STATUS_GOOD
:
2405 SCpnt
->result
= DID_OK
;
2408 case SBP2_SCSI_STATUS_BUSY
:
2409 SBP2_ERR("SBP2_SCSI_STATUS_BUSY");
2410 SCpnt
->result
= DID_BUS_BUSY
<< 16;
2413 case SBP2_SCSI_STATUS_CHECK_CONDITION
:
2414 SBP2_DEBUG("SBP2_SCSI_STATUS_CHECK_CONDITION");
2415 SCpnt
->result
= CHECK_CONDITION
<< 1;
2420 #if CONFIG_IEEE1394_SBP2_DEBUG >= 1
2421 scsi_print_command(SCpnt
);
2422 scsi_print_sense("bh", SCpnt
);
2427 case SBP2_SCSI_STATUS_SELECTION_TIMEOUT
:
2428 SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT");
2429 SCpnt
->result
= DID_NO_CONNECT
<< 16;
2430 scsi_print_command(SCpnt
);
2433 case SBP2_SCSI_STATUS_CONDITION_MET
:
2434 case SBP2_SCSI_STATUS_RESERVATION_CONFLICT
:
2435 case SBP2_SCSI_STATUS_COMMAND_TERMINATED
:
2436 SBP2_ERR("Bad SCSI status = %x", scsi_status
);
2437 SCpnt
->result
= DID_ERROR
<< 16;
2438 scsi_print_command(SCpnt
);
2442 SBP2_ERR("Unsupported SCSI status = %x", scsi_status
);
2443 SCpnt
->result
= DID_ERROR
<< 16;
2447 * Take care of any sbp2 response data mucking here (RBC stuff, etc.)
2449 if (SCpnt
->result
== DID_OK
) {
2450 sbp2_check_sbp2_response(scsi_id
, SCpnt
);
2454 * If a bus reset is in progress and there was an error, complete
2455 * the command as busy so that it will get retried.
2457 if (!hpsb_node_entry_valid(scsi_id
->ne
)
2458 && (scsi_status
!= SBP2_SCSI_STATUS_GOOD
)) {
2459 SBP2_ERR("Completing command with busy (bus reset)");
2460 SCpnt
->result
= DID_BUS_BUSY
<< 16;
2464 * If a unit attention occurs, return busy status so it gets
2465 * retried... it could have happened because of a 1394 bus reset
2469 if ((scsi_status
== SBP2_SCSI_STATUS_CHECK_CONDITION
) &&
2470 (SCpnt
->sense_buffer
[2] == UNIT_ATTENTION
)) {
2471 SBP2_DEBUG("UNIT ATTENTION - return busy");
2472 SCpnt
->result
= DID_BUS_BUSY
<< 16;
2477 * Tell scsi stack that we're done with this command
2482 static int sbp2scsi_slave_alloc(struct scsi_device
*sdev
)
2484 ((struct scsi_id_instance_data
*)sdev
->host
->hostdata
[0])->sdev
= sdev
;
2488 static int sbp2scsi_slave_configure(struct scsi_device
*sdev
)
2490 blk_queue_dma_alignment(sdev
->request_queue
, (512 - 1));
2491 sdev
->use_10_for_rw
= 1;
2492 sdev
->use_10_for_ms
= 1;
2496 static void sbp2scsi_slave_destroy(struct scsi_device
*sdev
)
2498 ((struct scsi_id_instance_data
*)sdev
->host
->hostdata
[0])->sdev
= NULL
;
2503 * Called by scsi stack when something has really gone wrong. Usually
2504 * called when a command has timed-out for some reason.
2506 static int sbp2scsi_abort(struct scsi_cmnd
*SCpnt
)
2508 struct scsi_id_instance_data
*scsi_id
=
2509 (struct scsi_id_instance_data
*)SCpnt
->device
->host
->hostdata
[0];
2510 struct sbp2scsi_host_info
*hi
= scsi_id
->hi
;
2511 struct sbp2_command_info
*command
;
2513 SBP2_ERR("aborting sbp2 command");
2514 scsi_print_command(SCpnt
);
2516 if (sbp2util_node_is_available(scsi_id
)) {
2519 * Right now, just return any matching command structures
2522 command
= sbp2util_find_command_for_SCpnt(scsi_id
, SCpnt
);
2524 SBP2_DEBUG("Found command to abort");
2525 pci_dma_sync_single_for_cpu(hi
->host
->pdev
,
2526 command
->command_orb_dma
,
2527 sizeof(struct sbp2_command_orb
),
2528 PCI_DMA_BIDIRECTIONAL
);
2529 pci_dma_sync_single_for_cpu(hi
->host
->pdev
,
2531 sizeof(command
->scatter_gather_element
),
2532 PCI_DMA_BIDIRECTIONAL
);
2533 sbp2util_mark_command_completed(scsi_id
, command
);
2534 if (command
->Current_SCpnt
) {
2535 command
->Current_SCpnt
->result
= DID_ABORT
<< 16;
2536 command
->Current_done(command
->Current_SCpnt
);
2541 * Initiate a fetch agent reset.
2543 sbp2_agent_reset(scsi_id
, 0);
2544 sbp2scsi_complete_all_commands(scsi_id
, DID_BUS_BUSY
);
2551 * Called by scsi stack when something has really gone wrong.
2553 static int sbp2scsi_reset(struct scsi_cmnd
*SCpnt
)
2555 struct scsi_id_instance_data
*scsi_id
=
2556 (struct scsi_id_instance_data
*)SCpnt
->device
->host
->hostdata
[0];
2558 SBP2_ERR("reset requested");
2560 if (sbp2util_node_is_available(scsi_id
)) {
2561 SBP2_ERR("Generating sbp2 fetch agent reset");
2562 sbp2_agent_reset(scsi_id
, 0);
2568 static ssize_t
sbp2_sysfs_ieee1394_id_show(struct device
*dev
,
2569 struct device_attribute
*attr
,
2572 struct scsi_device
*sdev
;
2573 struct scsi_id_instance_data
*scsi_id
;
2576 if (!(sdev
= to_scsi_device(dev
)))
2579 if (!(scsi_id
= (struct scsi_id_instance_data
*)sdev
->host
->hostdata
[0]))
2582 lun
= ORB_SET_LUN(scsi_id
->sbp2_lun
);
2584 return sprintf(buf
, "%016Lx:%d:%d\n", (unsigned long long)scsi_id
->ne
->guid
,
2585 scsi_id
->ud
->id
, lun
);
2587 static DEVICE_ATTR(ieee1394_id
, S_IRUGO
, sbp2_sysfs_ieee1394_id_show
, NULL
);
2589 static struct device_attribute
*sbp2_sysfs_sdev_attrs
[] = {
2590 &dev_attr_ieee1394_id
,
2594 MODULE_AUTHOR("Ben Collins <bcollins@debian.org>");
2595 MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver");
2596 MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME
);
2597 MODULE_LICENSE("GPL");
2599 /* SCSI host template */
2600 static struct scsi_host_template scsi_driver_template
= {
2601 .module
= THIS_MODULE
,
2602 .name
= "SBP-2 IEEE-1394",
2603 .proc_name
= SBP2_DEVICE_NAME
,
2604 .queuecommand
= sbp2scsi_queuecommand
,
2605 .eh_abort_handler
= sbp2scsi_abort
,
2606 .eh_device_reset_handler
= sbp2scsi_reset
,
2607 .slave_alloc
= sbp2scsi_slave_alloc
,
2608 .slave_configure
= sbp2scsi_slave_configure
,
2609 .slave_destroy
= sbp2scsi_slave_destroy
,
2611 .sg_tablesize
= SG_ALL
,
2612 .use_clustering
= ENABLE_CLUSTERING
,
2613 .cmd_per_lun
= SBP2_MAX_CMDS
,
2614 .can_queue
= SBP2_MAX_CMDS
,
2616 .sdev_attrs
= sbp2_sysfs_sdev_attrs
,
2619 static int sbp2_module_init(void)
2623 SBP2_DEBUG("sbp2_module_init");
2625 /* Module load debug option to force one command at a time (serializing I/O) */
2627 SBP2_INFO("Driver forced to serialize I/O (serialize_io=1)");
2628 SBP2_INFO("Try serialize_io=0 for better performance");
2629 scsi_driver_template
.can_queue
= 1;
2630 scsi_driver_template
.cmd_per_lun
= 1;
2633 /* Set max sectors (module load option). Default is 255 sectors. */
2634 scsi_driver_template
.max_sectors
= max_sectors
;
2636 /* Register our high level driver with 1394 stack */
2637 hpsb_register_highlevel(&sbp2_highlevel
);
2639 ret
= hpsb_register_protocol(&sbp2_driver
);
2641 SBP2_ERR("Failed to register protocol");
2642 hpsb_unregister_highlevel(&sbp2_highlevel
);
2649 static void __exit
sbp2_module_exit(void)
2651 SBP2_DEBUG("sbp2_module_exit");
2653 hpsb_unregister_protocol(&sbp2_driver
);
2655 hpsb_unregister_highlevel(&sbp2_highlevel
);
2658 module_init(sbp2_module_init
);
2659 module_exit(sbp2_module_exit
);