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1da177e4 LT |
1 | /* |
2 | * sbp2.c - SBP-2 protocol driver for IEEE-1394 | |
3 | * | |
4 | * Copyright (C) 2000 James Goodwin, Filanet Corporation (www.filanet.com) | |
5 | * jamesg@filanet.com (JSG) | |
6 | * | |
7 | * Copyright (C) 2003 Ben Collins <bcollins@debian.org> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software Foundation, | |
21 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
22 | */ | |
23 | ||
24 | /* | |
25 | * Brief Description: | |
26 | * | |
27 | * This driver implements the Serial Bus Protocol 2 (SBP-2) over IEEE-1394 | |
28 | * under Linux. The SBP-2 driver is implemented as an IEEE-1394 high-level | |
29 | * driver. It also registers as a SCSI lower-level driver in order to accept | |
30 | * SCSI commands for transport using SBP-2. | |
31 | * | |
32 | * You may access any attached SBP-2 storage devices as if they were SCSI | |
33 | * devices (e.g. mount /dev/sda1, fdisk, mkfs, etc.). | |
34 | * | |
35 | * Current Issues: | |
36 | * | |
37 | * - Error Handling: SCSI aborts and bus reset requests are handled somewhat | |
38 | * but the code needs additional debugging. | |
39 | */ | |
40 | ||
41 | #include <linux/config.h> | |
42 | #include <linux/kernel.h> | |
43 | #include <linux/list.h> | |
44 | #include <linux/string.h> | |
45 | #include <linux/slab.h> | |
46 | #include <linux/interrupt.h> | |
47 | #include <linux/fs.h> | |
48 | #include <linux/poll.h> | |
49 | #include <linux/module.h> | |
50 | #include <linux/moduleparam.h> | |
51 | #include <linux/types.h> | |
52 | #include <linux/delay.h> | |
53 | #include <linux/sched.h> | |
54 | #include <linux/blkdev.h> | |
55 | #include <linux/smp_lock.h> | |
56 | #include <linux/init.h> | |
57 | #include <linux/pci.h> | |
58 | ||
59 | #include <asm/current.h> | |
60 | #include <asm/uaccess.h> | |
61 | #include <asm/io.h> | |
62 | #include <asm/byteorder.h> | |
63 | #include <asm/atomic.h> | |
64 | #include <asm/system.h> | |
65 | #include <asm/scatterlist.h> | |
66 | ||
67 | #include <scsi/scsi.h> | |
68 | #include <scsi/scsi_cmnd.h> | |
69 | #include <scsi/scsi_dbg.h> | |
70 | #include <scsi/scsi_device.h> | |
71 | #include <scsi/scsi_host.h> | |
72 | ||
73 | #include "csr1212.h" | |
74 | #include "ieee1394.h" | |
75 | #include "ieee1394_types.h" | |
76 | #include "ieee1394_core.h" | |
77 | #include "nodemgr.h" | |
78 | #include "hosts.h" | |
79 | #include "highlevel.h" | |
80 | #include "ieee1394_transactions.h" | |
81 | #include "sbp2.h" | |
82 | ||
1da177e4 LT |
83 | /* |
84 | * Module load parameter definitions | |
85 | */ | |
86 | ||
87 | /* | |
88 | * Change max_speed on module load if you have a bad IEEE-1394 | |
89 | * controller that has trouble running 2KB packets at 400mb. | |
90 | * | |
91 | * NOTE: On certain OHCI parts I have seen short packets on async transmit | |
92 | * (probably due to PCI latency/throughput issues with the part). You can | |
93 | * bump down the speed if you are running into problems. | |
94 | */ | |
95 | static int max_speed = IEEE1394_SPEED_MAX; | |
96 | module_param(max_speed, int, 0644); | |
2bab359a | 97 | MODULE_PARM_DESC(max_speed, "Force max speed (3 = 800mb, 2 = 400mb, 1 = 200mb, 0 = 100mb)"); |
1da177e4 LT |
98 | |
99 | /* | |
100 | * Set serialize_io to 1 if you'd like only one scsi command sent | |
101 | * down to us at a time (debugging). This might be necessary for very | |
102 | * badly behaved sbp2 devices. | |
2bab359a JM |
103 | * |
104 | * TODO: Make this configurable per device. | |
1da177e4 | 105 | */ |
2bab359a | 106 | static int serialize_io = 1; |
1da177e4 | 107 | module_param(serialize_io, int, 0444); |
2bab359a | 108 | MODULE_PARM_DESC(serialize_io, "Serialize I/O coming from scsi drivers (default = 1, faster = 0)"); |
1da177e4 LT |
109 | |
110 | /* | |
111 | * Bump up max_sectors if you'd like to support very large sized | |
112 | * transfers. Please note that some older sbp2 bridge chips are broken for | |
113 | * transfers greater or equal to 128KB. Default is a value of 255 | |
114 | * sectors, or just under 128KB (at 512 byte sector size). I can note that | |
115 | * the Oxsemi sbp2 chipsets have no problems supporting very large | |
116 | * transfer sizes. | |
117 | */ | |
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)"); | |
121 | ||
122 | /* | |
123 | * Exclusive login to sbp2 device? In most cases, the sbp2 driver should | |
124 | * do an exclusive login, as it's generally unsafe to have two hosts | |
125 | * talking to a single sbp2 device at the same time (filesystem coherency, | |
126 | * etc.). If you're running an sbp2 device that supports multiple logins, | |
127 | * and you're either running read-only filesystems or some sort of special | |
128 | * filesystem supporting multiple hosts (one such filesystem is OpenGFS, | |
129 | * see opengfs.sourceforge.net for more info), then set exclusive_login | |
130 | * to zero. Note: The Oxsemi OXFW911 sbp2 chipset supports up to four | |
131 | * concurrent logins. | |
132 | */ | |
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)"); | |
136 | ||
137 | /* | |
138 | * SCSI inquiry hack for really badly behaved sbp2 devices. Turn this on | |
139 | * if your sbp2 device is not properly handling the SCSI inquiry command. | |
a80614d1 SR |
140 | * This hack makes the inquiry look more like a typical MS Windows inquiry |
141 | * by enforcing 36 byte inquiry and avoiding access to mode_sense page 8. | |
1da177e4 LT |
142 | * |
143 | * If force_inquiry_hack=1 is required for your device to work, | |
144 | * please submit the logged sbp2_firmware_revision value of this device to | |
145 | * the linux1394-devel mailing list. | |
146 | */ | |
1934b8b6 | 147 | static int force_inquiry_hack; |
a80614d1 | 148 | module_param(force_inquiry_hack, int, 0644); |
1da177e4 LT |
149 | MODULE_PARM_DESC(force_inquiry_hack, "Force SCSI inquiry hack (default = 0)"); |
150 | ||
1da177e4 LT |
151 | /* |
152 | * Export information about protocols/devices supported by this driver. | |
153 | */ | |
154 | static struct ieee1394_device_id sbp2_id_table[] = { | |
155 | { | |
a237f35f SR |
156 | .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION, |
157 | .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff, | |
158 | .version = SBP2_SW_VERSION_ENTRY & 0xffffff}, | |
159 | {} | |
1da177e4 LT |
160 | }; |
161 | ||
162 | MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); | |
163 | ||
164 | /* | |
165 | * Debug levels, configured via kernel config, or enable here. | |
166 | */ | |
167 | ||
44456d37 | 168 | #define CONFIG_IEEE1394_SBP2_DEBUG 0 |
1da177e4 LT |
169 | /* #define CONFIG_IEEE1394_SBP2_DEBUG_ORBS */ |
170 | /* #define CONFIG_IEEE1394_SBP2_DEBUG_DMA */ | |
171 | /* #define CONFIG_IEEE1394_SBP2_DEBUG 1 */ | |
172 | /* #define CONFIG_IEEE1394_SBP2_DEBUG 2 */ | |
173 | /* #define CONFIG_IEEE1394_SBP2_PACKET_DUMP */ | |
174 | ||
175 | #ifdef CONFIG_IEEE1394_SBP2_DEBUG_ORBS | |
176 | #define SBP2_ORB_DEBUG(fmt, args...) HPSB_ERR("sbp2(%s): "fmt, __FUNCTION__, ## args) | |
177 | static u32 global_outstanding_command_orbs = 0; | |
178 | #define outstanding_orb_incr global_outstanding_command_orbs++ | |
179 | #define outstanding_orb_decr global_outstanding_command_orbs-- | |
180 | #else | |
181 | #define SBP2_ORB_DEBUG(fmt, args...) | |
182 | #define outstanding_orb_incr | |
183 | #define outstanding_orb_decr | |
184 | #endif | |
185 | ||
186 | #ifdef CONFIG_IEEE1394_SBP2_DEBUG_DMA | |
187 | #define SBP2_DMA_ALLOC(fmt, args...) \ | |
188 | HPSB_ERR("sbp2(%s)alloc(%d): "fmt, __FUNCTION__, \ | |
189 | ++global_outstanding_dmas, ## args) | |
190 | #define SBP2_DMA_FREE(fmt, args...) \ | |
191 | HPSB_ERR("sbp2(%s)free(%d): "fmt, __FUNCTION__, \ | |
192 | --global_outstanding_dmas, ## args) | |
193 | static u32 global_outstanding_dmas = 0; | |
194 | #else | |
195 | #define SBP2_DMA_ALLOC(fmt, args...) | |
196 | #define SBP2_DMA_FREE(fmt, args...) | |
197 | #endif | |
198 | ||
199 | #if CONFIG_IEEE1394_SBP2_DEBUG >= 2 | |
200 | #define SBP2_DEBUG(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
201 | #define SBP2_INFO(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
202 | #define SBP2_NOTICE(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
203 | #define SBP2_WARN(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
204 | #elif CONFIG_IEEE1394_SBP2_DEBUG == 1 | |
205 | #define SBP2_DEBUG(fmt, args...) HPSB_DEBUG("sbp2: "fmt, ## args) | |
206 | #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args) | |
207 | #define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args) | |
208 | #define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args) | |
209 | #else | |
210 | #define SBP2_DEBUG(fmt, args...) | |
211 | #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args) | |
212 | #define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args) | |
213 | #define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args) | |
214 | #endif | |
215 | ||
216 | #define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
217 | ||
1da177e4 LT |
218 | /* |
219 | * Globals | |
220 | */ | |
221 | ||
222 | static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id, | |
223 | u32 status); | |
224 | ||
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 *)); | |
228 | ||
229 | static struct scsi_host_template scsi_driver_template; | |
230 | ||
231 | static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC }; | |
232 | ||
233 | static void sbp2_host_reset(struct hpsb_host *host); | |
234 | ||
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); | |
238 | ||
239 | static struct hpsb_highlevel sbp2_highlevel = { | |
240 | .name = SBP2_DEVICE_NAME, | |
241 | .host_reset = sbp2_host_reset, | |
242 | }; | |
243 | ||
244 | static struct hpsb_address_ops sbp2_ops = { | |
245 | .write = sbp2_handle_status_write | |
246 | }; | |
247 | ||
248 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA | |
249 | static struct hpsb_address_ops sbp2_physdma_ops = { | |
a237f35f SR |
250 | .read = sbp2_handle_physdma_read, |
251 | .write = sbp2_handle_physdma_write, | |
1da177e4 LT |
252 | }; |
253 | #endif | |
254 | ||
255 | static struct hpsb_protocol_driver sbp2_driver = { | |
256 | .name = "SBP2 Driver", | |
257 | .id_table = sbp2_id_table, | |
258 | .update = sbp2_update, | |
259 | .driver = { | |
260 | .name = SBP2_DEVICE_NAME, | |
261 | .bus = &ieee1394_bus_type, | |
262 | .probe = sbp2_probe, | |
263 | .remove = sbp2_remove, | |
264 | }, | |
265 | }; | |
266 | ||
a80614d1 SR |
267 | /* |
268 | * List of device firmwares that require the inquiry hack. | |
269 | * Yields a few false positives but did not break other devices so far. | |
270 | */ | |
1da177e4 | 271 | static u32 sbp2_broken_inquiry_list[] = { |
a80614d1 | 272 | 0x00002800, /* Stefan Richter <stefanr@s5r6.in-berlin.de> */ |
1da177e4 LT |
273 | /* DViCO Momobay CX-1 */ |
274 | 0x00000200 /* Andreas Plesch <plesch@fas.harvard.edu> */ | |
275 | /* QPS Fire DVDBurner */ | |
276 | }; | |
277 | ||
1da177e4 LT |
278 | /************************************** |
279 | * General utility functions | |
280 | **************************************/ | |
281 | ||
1da177e4 LT |
282 | #ifndef __BIG_ENDIAN |
283 | /* | |
284 | * Converts a buffer from be32 to cpu byte ordering. Length is in bytes. | |
285 | */ | |
286 | static __inline__ void sbp2util_be32_to_cpu_buffer(void *buffer, int length) | |
287 | { | |
288 | u32 *temp = buffer; | |
289 | ||
290 | for (length = (length >> 2); length--; ) | |
291 | temp[length] = be32_to_cpu(temp[length]); | |
292 | ||
293 | return; | |
294 | } | |
295 | ||
296 | /* | |
297 | * Converts a buffer from cpu to be32 byte ordering. Length is in bytes. | |
298 | */ | |
299 | static __inline__ void sbp2util_cpu_to_be32_buffer(void *buffer, int length) | |
300 | { | |
301 | u32 *temp = buffer; | |
302 | ||
303 | for (length = (length >> 2); length--; ) | |
304 | temp[length] = cpu_to_be32(temp[length]); | |
305 | ||
306 | return; | |
307 | } | |
308 | #else /* BIG_ENDIAN */ | |
309 | /* Why waste the cpu cycles? */ | |
310 | #define sbp2util_be32_to_cpu_buffer(x,y) | |
311 | #define sbp2util_cpu_to_be32_buffer(x,y) | |
312 | #endif | |
313 | ||
314 | #ifdef CONFIG_IEEE1394_SBP2_PACKET_DUMP | |
315 | /* | |
316 | * Debug packet dump routine. Length is in bytes. | |
317 | */ | |
a237f35f SR |
318 | static void sbp2util_packet_dump(void *buffer, int length, char *dump_name, |
319 | u32 dump_phys_addr) | |
1da177e4 LT |
320 | { |
321 | int i; | |
322 | unsigned char *dump = buffer; | |
323 | ||
324 | if (!dump || !length || !dump_name) | |
325 | return; | |
326 | ||
327 | if (dump_phys_addr) | |
328 | printk("[%s, 0x%x]", dump_name, dump_phys_addr); | |
329 | else | |
330 | printk("[%s]", dump_name); | |
331 | for (i = 0; i < length; i++) { | |
332 | if (i > 0x3f) { | |
333 | printk("\n ..."); | |
334 | break; | |
335 | } | |
336 | if ((i & 0x3) == 0) | |
337 | printk(" "); | |
338 | if ((i & 0xf) == 0) | |
339 | printk("\n "); | |
a237f35f | 340 | printk("%02x ", (int)dump[i]); |
1da177e4 LT |
341 | } |
342 | printk("\n"); | |
343 | ||
344 | return; | |
345 | } | |
346 | #else | |
347 | #define sbp2util_packet_dump(w,x,y,z) | |
348 | #endif | |
349 | ||
350 | /* | |
351 | * Goofy routine that basically does a down_timeout function. | |
352 | */ | |
353 | static int sbp2util_down_timeout(atomic_t *done, int timeout) | |
354 | { | |
355 | int i; | |
356 | ||
357 | for (i = timeout; (i > 0 && atomic_read(done) == 0); i-= HZ/10) { | |
358 | if (msleep_interruptible(100)) /* 100ms */ | |
a237f35f | 359 | return 1; |
1da177e4 | 360 | } |
a237f35f | 361 | return (i > 0) ? 0 : 1; |
1da177e4 LT |
362 | } |
363 | ||
364 | /* Free's an allocated packet */ | |
365 | static void sbp2_free_packet(struct hpsb_packet *packet) | |
366 | { | |
367 | hpsb_free_tlabel(packet); | |
368 | hpsb_free_packet(packet); | |
369 | } | |
370 | ||
371 | /* This is much like hpsb_node_write(), except it ignores the response | |
372 | * subaction and returns immediately. Can be used from interrupts. | |
373 | */ | |
374 | static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr, | |
a237f35f | 375 | quadlet_t *buffer, size_t length) |
1da177e4 LT |
376 | { |
377 | struct hpsb_packet *packet; | |
378 | ||
379 | packet = hpsb_make_writepacket(ne->host, ne->nodeid, | |
380 | addr, buffer, length); | |
a237f35f SR |
381 | if (!packet) |
382 | return -ENOMEM; | |
1da177e4 | 383 | |
a237f35f SR |
384 | hpsb_set_packet_complete_task(packet, |
385 | (void (*)(void *))sbp2_free_packet, | |
1da177e4 LT |
386 | packet); |
387 | ||
388 | hpsb_node_fill_packet(ne, packet); | |
389 | ||
a237f35f | 390 | if (hpsb_send_packet(packet) < 0) { |
1da177e4 LT |
391 | sbp2_free_packet(packet); |
392 | return -EIO; | |
393 | } | |
394 | ||
395 | return 0; | |
396 | } | |
397 | ||
398 | /* | |
399 | * This function is called to create a pool of command orbs used for | |
400 | * command processing. It is called when a new sbp2 device is detected. | |
401 | */ | |
402 | static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data *scsi_id) | |
403 | { | |
404 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
405 | int i; | |
406 | unsigned long flags, orbs; | |
407 | struct sbp2_command_info *command; | |
408 | ||
409 | orbs = serialize_io ? 2 : SBP2_MAX_CMDS; | |
410 | ||
411 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
412 | for (i = 0; i < orbs; i++) { | |
8551158a | 413 | command = kzalloc(sizeof(*command), GFP_ATOMIC); |
1da177e4 | 414 | if (!command) { |
a237f35f SR |
415 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, |
416 | flags); | |
417 | return -ENOMEM; | |
1da177e4 | 418 | } |
1da177e4 | 419 | command->command_orb_dma = |
a237f35f SR |
420 | pci_map_single(hi->host->pdev, &command->command_orb, |
421 | sizeof(struct sbp2_command_orb), | |
422 | PCI_DMA_BIDIRECTIONAL); | |
1da177e4 LT |
423 | SBP2_DMA_ALLOC("single command orb DMA"); |
424 | command->sge_dma = | |
a237f35f SR |
425 | pci_map_single(hi->host->pdev, |
426 | &command->scatter_gather_element, | |
427 | sizeof(command->scatter_gather_element), | |
428 | PCI_DMA_BIDIRECTIONAL); | |
1da177e4 LT |
429 | SBP2_DMA_ALLOC("scatter_gather_element"); |
430 | INIT_LIST_HEAD(&command->list); | |
431 | list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed); | |
432 | } | |
433 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
434 | return 0; | |
435 | } | |
436 | ||
437 | /* | |
438 | * This function is called to delete a pool of command orbs. | |
439 | */ | |
440 | static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data *scsi_id) | |
441 | { | |
442 | struct hpsb_host *host = scsi_id->hi->host; | |
443 | struct list_head *lh, *next; | |
444 | struct sbp2_command_info *command; | |
445 | unsigned long flags; | |
446 | ||
447 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
448 | if (!list_empty(&scsi_id->sbp2_command_orb_completed)) { | |
449 | list_for_each_safe(lh, next, &scsi_id->sbp2_command_orb_completed) { | |
450 | command = list_entry(lh, struct sbp2_command_info, list); | |
451 | ||
452 | /* Release our generic DMA's */ | |
453 | pci_unmap_single(host->pdev, command->command_orb_dma, | |
454 | sizeof(struct sbp2_command_orb), | |
455 | PCI_DMA_BIDIRECTIONAL); | |
456 | SBP2_DMA_FREE("single command orb DMA"); | |
457 | pci_unmap_single(host->pdev, command->sge_dma, | |
458 | sizeof(command->scatter_gather_element), | |
459 | PCI_DMA_BIDIRECTIONAL); | |
460 | SBP2_DMA_FREE("scatter_gather_element"); | |
461 | ||
462 | kfree(command); | |
463 | } | |
464 | } | |
465 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
466 | return; | |
467 | } | |
468 | ||
469 | /* | |
470 | * This function finds the sbp2_command for a given outstanding command | |
471 | * orb.Only looks at the inuse list. | |
472 | */ | |
473 | static struct sbp2_command_info *sbp2util_find_command_for_orb( | |
474 | struct scsi_id_instance_data *scsi_id, dma_addr_t orb) | |
475 | { | |
476 | struct sbp2_command_info *command; | |
477 | unsigned long flags; | |
478 | ||
479 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
480 | if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) { | |
481 | list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) { | |
482 | if (command->command_orb_dma == orb) { | |
483 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
a237f35f | 484 | return command; |
1da177e4 LT |
485 | } |
486 | } | |
487 | } | |
488 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
489 | ||
490 | SBP2_ORB_DEBUG("could not match command orb %x", (unsigned int)orb); | |
491 | ||
a237f35f | 492 | return NULL; |
1da177e4 LT |
493 | } |
494 | ||
495 | /* | |
496 | * This function finds the sbp2_command for a given outstanding SCpnt. | |
497 | * Only looks at the inuse list. | |
498 | */ | |
499 | static struct sbp2_command_info *sbp2util_find_command_for_SCpnt(struct scsi_id_instance_data *scsi_id, void *SCpnt) | |
500 | { | |
501 | struct sbp2_command_info *command; | |
502 | unsigned long flags; | |
503 | ||
504 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
505 | if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) { | |
506 | list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) { | |
507 | if (command->Current_SCpnt == SCpnt) { | |
508 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
a237f35f | 509 | return command; |
1da177e4 LT |
510 | } |
511 | } | |
512 | } | |
513 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
a237f35f | 514 | return NULL; |
1da177e4 LT |
515 | } |
516 | ||
517 | /* | |
518 | * This function allocates a command orb used to send a scsi command. | |
519 | */ | |
520 | static struct sbp2_command_info *sbp2util_allocate_command_orb( | |
521 | struct scsi_id_instance_data *scsi_id, | |
522 | struct scsi_cmnd *Current_SCpnt, | |
523 | void (*Current_done)(struct scsi_cmnd *)) | |
524 | { | |
525 | struct list_head *lh; | |
526 | struct sbp2_command_info *command = NULL; | |
527 | unsigned long flags; | |
528 | ||
529 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
530 | if (!list_empty(&scsi_id->sbp2_command_orb_completed)) { | |
531 | lh = scsi_id->sbp2_command_orb_completed.next; | |
532 | list_del(lh); | |
533 | command = list_entry(lh, struct sbp2_command_info, list); | |
534 | command->Current_done = Current_done; | |
535 | command->Current_SCpnt = Current_SCpnt; | |
536 | list_add_tail(&command->list, &scsi_id->sbp2_command_orb_inuse); | |
537 | } else { | |
538 | SBP2_ERR("sbp2util_allocate_command_orb - No orbs available!"); | |
539 | } | |
540 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
a237f35f | 541 | return command; |
1da177e4 LT |
542 | } |
543 | ||
544 | /* Free our DMA's */ | |
545 | static void sbp2util_free_command_dma(struct sbp2_command_info *command) | |
546 | { | |
547 | struct scsi_id_instance_data *scsi_id = | |
548 | (struct scsi_id_instance_data *)command->Current_SCpnt->device->host->hostdata[0]; | |
549 | struct hpsb_host *host; | |
550 | ||
551 | if (!scsi_id) { | |
552 | printk(KERN_ERR "%s: scsi_id == NULL\n", __FUNCTION__); | |
553 | return; | |
554 | } | |
555 | ||
556 | host = scsi_id->ud->ne->host; | |
557 | ||
558 | if (command->cmd_dma) { | |
559 | if (command->dma_type == CMD_DMA_SINGLE) { | |
560 | pci_unmap_single(host->pdev, command->cmd_dma, | |
561 | command->dma_size, command->dma_dir); | |
562 | SBP2_DMA_FREE("single bulk"); | |
563 | } else if (command->dma_type == CMD_DMA_PAGE) { | |
564 | pci_unmap_page(host->pdev, command->cmd_dma, | |
565 | command->dma_size, command->dma_dir); | |
566 | SBP2_DMA_FREE("single page"); | |
567 | } /* XXX: Check for CMD_DMA_NONE bug */ | |
568 | command->dma_type = CMD_DMA_NONE; | |
569 | command->cmd_dma = 0; | |
570 | } | |
571 | ||
572 | if (command->sge_buffer) { | |
573 | pci_unmap_sg(host->pdev, command->sge_buffer, | |
574 | command->dma_size, command->dma_dir); | |
575 | SBP2_DMA_FREE("scatter list"); | |
576 | command->sge_buffer = NULL; | |
577 | } | |
578 | } | |
579 | ||
580 | /* | |
581 | * This function moves a command to the completed orb list. | |
582 | */ | |
a237f35f SR |
583 | static void sbp2util_mark_command_completed(struct scsi_id_instance_data *scsi_id, |
584 | struct sbp2_command_info *command) | |
1da177e4 LT |
585 | { |
586 | unsigned long flags; | |
587 | ||
588 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
589 | list_del(&command->list); | |
590 | sbp2util_free_command_dma(command); | |
591 | list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed); | |
592 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
593 | } | |
594 | ||
abd559b1 JM |
595 | /* |
596 | * Is scsi_id valid? Is the 1394 node still present? | |
597 | */ | |
598 | static inline int sbp2util_node_is_available(struct scsi_id_instance_data *scsi_id) | |
599 | { | |
600 | return scsi_id && scsi_id->ne && !scsi_id->ne->in_limbo; | |
601 | } | |
602 | ||
1da177e4 LT |
603 | /********************************************* |
604 | * IEEE-1394 core driver stack related section | |
605 | *********************************************/ | |
606 | static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud); | |
607 | ||
608 | static int sbp2_probe(struct device *dev) | |
609 | { | |
610 | struct unit_directory *ud; | |
611 | struct scsi_id_instance_data *scsi_id; | |
612 | ||
613 | SBP2_DEBUG("sbp2_probe"); | |
614 | ||
615 | ud = container_of(dev, struct unit_directory, device); | |
616 | ||
617 | /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s) | |
618 | * instead. */ | |
619 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY) | |
620 | return -ENODEV; | |
621 | ||
a237f35f | 622 | scsi_id = sbp2_alloc_device(ud); |
1da177e4 | 623 | |
a237f35f SR |
624 | if (!scsi_id) |
625 | return -ENOMEM; | |
1da177e4 | 626 | |
a237f35f | 627 | sbp2_parse_unit_directory(scsi_id, ud); |
1da177e4 | 628 | |
a237f35f | 629 | return sbp2_start_device(scsi_id); |
1da177e4 LT |
630 | } |
631 | ||
632 | static int sbp2_remove(struct device *dev) | |
633 | { | |
634 | struct unit_directory *ud; | |
635 | struct scsi_id_instance_data *scsi_id; | |
abd559b1 | 636 | struct scsi_device *sdev; |
1da177e4 LT |
637 | |
638 | SBP2_DEBUG("sbp2_remove"); | |
639 | ||
640 | ud = container_of(dev, struct unit_directory, device); | |
641 | scsi_id = ud->device.driver_data; | |
abd559b1 JM |
642 | if (!scsi_id) |
643 | return 0; | |
644 | ||
bf637ec3 SR |
645 | if (scsi_id->scsi_host) { |
646 | /* Get rid of enqueued commands if there is no chance to | |
647 | * send them. */ | |
648 | if (!sbp2util_node_is_available(scsi_id)) | |
649 | sbp2scsi_complete_all_commands(scsi_id, DID_NO_CONNECT); | |
650 | /* scsi_remove_device() will trigger shutdown functions of SCSI | |
651 | * highlevel drivers which would deadlock if blocked. */ | |
abd559b1 | 652 | scsi_unblock_requests(scsi_id->scsi_host); |
bf637ec3 | 653 | } |
abd559b1 JM |
654 | sdev = scsi_id->sdev; |
655 | if (sdev) { | |
656 | scsi_id->sdev = NULL; | |
657 | scsi_remove_device(sdev); | |
658 | } | |
1da177e4 LT |
659 | |
660 | sbp2_logout_device(scsi_id); | |
661 | sbp2_remove_device(scsi_id); | |
662 | ||
663 | return 0; | |
664 | } | |
665 | ||
666 | static int sbp2_update(struct unit_directory *ud) | |
667 | { | |
668 | struct scsi_id_instance_data *scsi_id = ud->device.driver_data; | |
669 | ||
670 | SBP2_DEBUG("sbp2_update"); | |
671 | ||
672 | if (sbp2_reconnect_device(scsi_id)) { | |
673 | ||
674 | /* | |
675 | * Ok, reconnect has failed. Perhaps we didn't | |
676 | * reconnect fast enough. Try doing a regular login, but | |
677 | * first do a logout just in case of any weirdness. | |
678 | */ | |
679 | sbp2_logout_device(scsi_id); | |
680 | ||
681 | if (sbp2_login_device(scsi_id)) { | |
682 | /* Login failed too, just fail, and the backend | |
683 | * will call our sbp2_remove for us */ | |
684 | SBP2_ERR("Failed to reconnect to sbp2 device!"); | |
685 | return -EBUSY; | |
686 | } | |
687 | } | |
688 | ||
689 | /* Set max retries to something large on the device. */ | |
690 | sbp2_set_busy_timeout(scsi_id); | |
691 | ||
692 | /* Do a SBP-2 fetch agent reset. */ | |
693 | sbp2_agent_reset(scsi_id, 1); | |
694 | ||
695 | /* Get the max speed and packet size that we can use. */ | |
696 | sbp2_max_speed_and_size(scsi_id); | |
697 | ||
698 | /* Complete any pending commands with busy (so they get | |
699 | * retried) and remove them from our queue | |
700 | */ | |
701 | sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY); | |
702 | ||
703 | /* Make sure we unblock requests (since this is likely after a bus | |
704 | * reset). */ | |
705 | scsi_unblock_requests(scsi_id->scsi_host); | |
706 | ||
707 | return 0; | |
708 | } | |
709 | ||
710 | /* This functions is called by the sbp2_probe, for each new device. We now | |
711 | * allocate one scsi host for each scsi_id (unit directory). */ | |
712 | static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud) | |
713 | { | |
714 | struct sbp2scsi_host_info *hi; | |
715 | struct Scsi_Host *scsi_host = NULL; | |
716 | struct scsi_id_instance_data *scsi_id = NULL; | |
717 | ||
718 | SBP2_DEBUG("sbp2_alloc_device"); | |
719 | ||
8551158a | 720 | scsi_id = kzalloc(sizeof(*scsi_id), GFP_KERNEL); |
1da177e4 LT |
721 | if (!scsi_id) { |
722 | SBP2_ERR("failed to create scsi_id"); | |
723 | goto failed_alloc; | |
724 | } | |
1da177e4 LT |
725 | |
726 | scsi_id->ne = ud->ne; | |
727 | scsi_id->ud = ud; | |
728 | scsi_id->speed_code = IEEE1394_SPEED_100; | |
729 | scsi_id->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100]; | |
730 | atomic_set(&scsi_id->sbp2_login_complete, 0); | |
731 | INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_inuse); | |
732 | INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_completed); | |
733 | INIT_LIST_HEAD(&scsi_id->scsi_list); | |
734 | spin_lock_init(&scsi_id->sbp2_command_orb_lock); | |
e309fc6d | 735 | scsi_id->sbp2_lun = 0; |
1da177e4 LT |
736 | |
737 | ud->device.driver_data = scsi_id; | |
738 | ||
739 | hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host); | |
740 | if (!hi) { | |
741 | hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host, sizeof(*hi)); | |
742 | if (!hi) { | |
743 | SBP2_ERR("failed to allocate hostinfo"); | |
744 | goto failed_alloc; | |
745 | } | |
746 | SBP2_DEBUG("sbp2_alloc_device: allocated hostinfo"); | |
747 | hi->host = ud->ne->host; | |
748 | INIT_LIST_HEAD(&hi->scsi_ids); | |
749 | ||
1da177e4 LT |
750 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA |
751 | /* Handle data movement if physical dma is not | |
752 | * enabled/supportedon host controller */ | |
753 | hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, &sbp2_physdma_ops, | |
754 | 0x0ULL, 0xfffffffcULL); | |
755 | #endif | |
756 | } | |
757 | ||
758 | scsi_id->hi = hi; | |
759 | ||
760 | list_add_tail(&scsi_id->scsi_list, &hi->scsi_ids); | |
761 | ||
35bdddb8 SR |
762 | /* Register the status FIFO address range. We could use the same FIFO |
763 | * for targets at different nodes. However we need different FIFOs per | |
764 | * target in order to support multi-unit devices. */ | |
765 | scsi_id->status_fifo_addr = hpsb_allocate_and_register_addrspace( | |
766 | &sbp2_highlevel, ud->ne->host, &sbp2_ops, | |
767 | sizeof(struct sbp2_status_block), sizeof(quadlet_t), | |
768 | ~0ULL, ~0ULL); | |
769 | if (!scsi_id->status_fifo_addr) { | |
770 | SBP2_ERR("failed to allocate status FIFO address range"); | |
771 | goto failed_alloc; | |
772 | } | |
773 | ||
1da177e4 | 774 | /* Register our host with the SCSI stack. */ |
a2ef79e1 | 775 | scsi_host = scsi_host_alloc(&scsi_driver_template, |
a237f35f | 776 | sizeof(unsigned long)); |
1da177e4 LT |
777 | if (!scsi_host) { |
778 | SBP2_ERR("failed to register scsi host"); | |
779 | goto failed_alloc; | |
780 | } | |
781 | ||
782 | scsi_host->hostdata[0] = (unsigned long)scsi_id; | |
783 | ||
784 | if (!scsi_add_host(scsi_host, &ud->device)) { | |
785 | scsi_id->scsi_host = scsi_host; | |
786 | return scsi_id; | |
787 | } | |
788 | ||
789 | SBP2_ERR("failed to add scsi host"); | |
790 | scsi_host_put(scsi_host); | |
791 | ||
792 | failed_alloc: | |
793 | sbp2_remove_device(scsi_id); | |
794 | return NULL; | |
795 | } | |
796 | ||
1da177e4 LT |
797 | static void sbp2_host_reset(struct hpsb_host *host) |
798 | { | |
799 | struct sbp2scsi_host_info *hi; | |
800 | struct scsi_id_instance_data *scsi_id; | |
801 | ||
802 | hi = hpsb_get_hostinfo(&sbp2_highlevel, host); | |
803 | ||
804 | if (hi) { | |
805 | list_for_each_entry(scsi_id, &hi->scsi_ids, scsi_list) | |
806 | scsi_block_requests(scsi_id->scsi_host); | |
807 | } | |
808 | } | |
809 | ||
1da177e4 LT |
810 | /* |
811 | * This function is where we first pull the node unique ids, and then | |
812 | * allocate memory and register a SBP-2 device. | |
813 | */ | |
814 | static int sbp2_start_device(struct scsi_id_instance_data *scsi_id) | |
815 | { | |
816 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
146f7262 | 817 | int error; |
1da177e4 LT |
818 | |
819 | SBP2_DEBUG("sbp2_start_device"); | |
820 | ||
821 | /* Login FIFO DMA */ | |
822 | scsi_id->login_response = | |
a237f35f SR |
823 | pci_alloc_consistent(hi->host->pdev, |
824 | sizeof(struct sbp2_login_response), | |
1da177e4 LT |
825 | &scsi_id->login_response_dma); |
826 | if (!scsi_id->login_response) | |
827 | goto alloc_fail; | |
828 | SBP2_DMA_ALLOC("consistent DMA region for login FIFO"); | |
829 | ||
830 | /* Query logins ORB DMA */ | |
831 | scsi_id->query_logins_orb = | |
a237f35f SR |
832 | pci_alloc_consistent(hi->host->pdev, |
833 | sizeof(struct sbp2_query_logins_orb), | |
1da177e4 LT |
834 | &scsi_id->query_logins_orb_dma); |
835 | if (!scsi_id->query_logins_orb) | |
836 | goto alloc_fail; | |
837 | SBP2_DMA_ALLOC("consistent DMA region for query logins ORB"); | |
838 | ||
839 | /* Query logins response DMA */ | |
840 | scsi_id->query_logins_response = | |
a237f35f SR |
841 | pci_alloc_consistent(hi->host->pdev, |
842 | sizeof(struct sbp2_query_logins_response), | |
1da177e4 LT |
843 | &scsi_id->query_logins_response_dma); |
844 | if (!scsi_id->query_logins_response) | |
845 | goto alloc_fail; | |
846 | SBP2_DMA_ALLOC("consistent DMA region for query logins response"); | |
847 | ||
848 | /* Reconnect ORB DMA */ | |
849 | scsi_id->reconnect_orb = | |
a237f35f SR |
850 | pci_alloc_consistent(hi->host->pdev, |
851 | sizeof(struct sbp2_reconnect_orb), | |
1da177e4 LT |
852 | &scsi_id->reconnect_orb_dma); |
853 | if (!scsi_id->reconnect_orb) | |
854 | goto alloc_fail; | |
855 | SBP2_DMA_ALLOC("consistent DMA region for reconnect ORB"); | |
856 | ||
857 | /* Logout ORB DMA */ | |
858 | scsi_id->logout_orb = | |
a237f35f SR |
859 | pci_alloc_consistent(hi->host->pdev, |
860 | sizeof(struct sbp2_logout_orb), | |
1da177e4 LT |
861 | &scsi_id->logout_orb_dma); |
862 | if (!scsi_id->logout_orb) | |
863 | goto alloc_fail; | |
864 | SBP2_DMA_ALLOC("consistent DMA region for logout ORB"); | |
865 | ||
866 | /* Login ORB DMA */ | |
867 | scsi_id->login_orb = | |
a237f35f SR |
868 | pci_alloc_consistent(hi->host->pdev, |
869 | sizeof(struct sbp2_login_orb), | |
1da177e4 | 870 | &scsi_id->login_orb_dma); |
eaceec7f SR |
871 | if (!scsi_id->login_orb) |
872 | goto alloc_fail; | |
1da177e4 LT |
873 | SBP2_DMA_ALLOC("consistent DMA region for login ORB"); |
874 | ||
875 | SBP2_DEBUG("New SBP-2 device inserted, SCSI ID = %x", scsi_id->ud->id); | |
876 | ||
877 | /* | |
878 | * Create our command orb pool | |
879 | */ | |
880 | if (sbp2util_create_command_orb_pool(scsi_id)) { | |
881 | SBP2_ERR("sbp2util_create_command_orb_pool failed!"); | |
882 | sbp2_remove_device(scsi_id); | |
883 | return -ENOMEM; | |
884 | } | |
885 | ||
886 | /* Schedule a timeout here. The reason is that we may be so close | |
887 | * to a bus reset, that the device is not available for logins. | |
888 | * This can happen when the bus reset is caused by the host | |
889 | * connected to the sbp2 device being removed. That host would | |
890 | * have a certain amount of time to relogin before the sbp2 device | |
891 | * allows someone else to login instead. One second makes sense. */ | |
892 | msleep_interruptible(1000); | |
893 | if (signal_pending(current)) { | |
894 | SBP2_WARN("aborting sbp2_start_device due to event"); | |
895 | sbp2_remove_device(scsi_id); | |
896 | return -EINTR; | |
897 | } | |
a237f35f | 898 | |
1da177e4 LT |
899 | /* |
900 | * Login to the sbp-2 device | |
901 | */ | |
902 | if (sbp2_login_device(scsi_id)) { | |
903 | /* Login failed, just remove the device. */ | |
904 | sbp2_remove_device(scsi_id); | |
905 | return -EBUSY; | |
906 | } | |
907 | ||
908 | /* | |
909 | * Set max retries to something large on the device | |
910 | */ | |
911 | sbp2_set_busy_timeout(scsi_id); | |
912 | ||
913 | /* | |
914 | * Do a SBP-2 fetch agent reset | |
915 | */ | |
916 | sbp2_agent_reset(scsi_id, 1); | |
917 | ||
918 | /* | |
919 | * Get the max speed and packet size that we can use | |
920 | */ | |
921 | sbp2_max_speed_and_size(scsi_id); | |
922 | ||
923 | /* Add this device to the scsi layer now */ | |
146f7262 JB |
924 | error = scsi_add_device(scsi_id->scsi_host, 0, scsi_id->ud->id, 0); |
925 | if (error) { | |
1da177e4 | 926 | SBP2_ERR("scsi_add_device failed"); |
dc3edd54 SR |
927 | sbp2_logout_device(scsi_id); |
928 | sbp2_remove_device(scsi_id); | |
146f7262 | 929 | return error; |
1da177e4 LT |
930 | } |
931 | ||
932 | return 0; | |
eaceec7f SR |
933 | |
934 | alloc_fail: | |
935 | SBP2_ERR("Could not allocate memory for scsi_id"); | |
936 | sbp2_remove_device(scsi_id); | |
937 | return -ENOMEM; | |
1da177e4 LT |
938 | } |
939 | ||
940 | /* | |
941 | * This function removes an sbp2 device from the sbp2scsi_host_info struct. | |
942 | */ | |
943 | static void sbp2_remove_device(struct scsi_id_instance_data *scsi_id) | |
944 | { | |
945 | struct sbp2scsi_host_info *hi; | |
946 | ||
947 | SBP2_DEBUG("sbp2_remove_device"); | |
948 | ||
949 | if (!scsi_id) | |
950 | return; | |
951 | ||
952 | hi = scsi_id->hi; | |
953 | ||
954 | /* This will remove our scsi device aswell */ | |
955 | if (scsi_id->scsi_host) { | |
956 | scsi_remove_host(scsi_id->scsi_host); | |
957 | scsi_host_put(scsi_id->scsi_host); | |
958 | } | |
959 | ||
960 | sbp2util_remove_command_orb_pool(scsi_id); | |
961 | ||
962 | list_del(&scsi_id->scsi_list); | |
963 | ||
964 | if (scsi_id->login_response) { | |
965 | pci_free_consistent(hi->host->pdev, | |
966 | sizeof(struct sbp2_login_response), | |
967 | scsi_id->login_response, | |
968 | scsi_id->login_response_dma); | |
969 | SBP2_DMA_FREE("single login FIFO"); | |
970 | } | |
971 | ||
972 | if (scsi_id->login_orb) { | |
973 | pci_free_consistent(hi->host->pdev, | |
974 | sizeof(struct sbp2_login_orb), | |
975 | scsi_id->login_orb, | |
976 | scsi_id->login_orb_dma); | |
977 | SBP2_DMA_FREE("single login ORB"); | |
978 | } | |
979 | ||
980 | if (scsi_id->reconnect_orb) { | |
981 | pci_free_consistent(hi->host->pdev, | |
982 | sizeof(struct sbp2_reconnect_orb), | |
983 | scsi_id->reconnect_orb, | |
984 | scsi_id->reconnect_orb_dma); | |
985 | SBP2_DMA_FREE("single reconnect orb"); | |
986 | } | |
987 | ||
988 | if (scsi_id->logout_orb) { | |
989 | pci_free_consistent(hi->host->pdev, | |
990 | sizeof(struct sbp2_logout_orb), | |
991 | scsi_id->logout_orb, | |
992 | scsi_id->logout_orb_dma); | |
993 | SBP2_DMA_FREE("single logout orb"); | |
994 | } | |
995 | ||
996 | if (scsi_id->query_logins_orb) { | |
997 | pci_free_consistent(hi->host->pdev, | |
998 | sizeof(struct sbp2_query_logins_orb), | |
999 | scsi_id->query_logins_orb, | |
1000 | scsi_id->query_logins_orb_dma); | |
1001 | SBP2_DMA_FREE("single query logins orb"); | |
1002 | } | |
1003 | ||
1004 | if (scsi_id->query_logins_response) { | |
1005 | pci_free_consistent(hi->host->pdev, | |
1006 | sizeof(struct sbp2_query_logins_response), | |
1007 | scsi_id->query_logins_response, | |
1008 | scsi_id->query_logins_response_dma); | |
1009 | SBP2_DMA_FREE("single query logins data"); | |
1010 | } | |
1011 | ||
35bdddb8 SR |
1012 | if (scsi_id->status_fifo_addr) |
1013 | hpsb_unregister_addrspace(&sbp2_highlevel, hi->host, | |
1014 | scsi_id->status_fifo_addr); | |
1015 | ||
1da177e4 LT |
1016 | scsi_id->ud->device.driver_data = NULL; |
1017 | ||
1018 | SBP2_DEBUG("SBP-2 device removed, SCSI ID = %d", scsi_id->ud->id); | |
1019 | ||
1020 | kfree(scsi_id); | |
1021 | } | |
1022 | ||
1023 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA | |
1024 | /* | |
1025 | * This function deals with physical dma write requests (for adapters that do not support | |
1026 | * physical dma in hardware). Mostly just here for debugging... | |
1027 | */ | |
a237f35f SR |
1028 | static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid, |
1029 | int destid, quadlet_t *data, u64 addr, | |
1030 | size_t length, u16 flags) | |
1da177e4 LT |
1031 | { |
1032 | ||
a237f35f SR |
1033 | /* |
1034 | * Manually put the data in the right place. | |
1035 | */ | |
1036 | memcpy(bus_to_virt((u32) addr), data, length); | |
1037 | sbp2util_packet_dump(data, length, "sbp2 phys dma write by device", | |
1038 | (u32) addr); | |
1039 | return RCODE_COMPLETE; | |
1da177e4 LT |
1040 | } |
1041 | ||
1042 | /* | |
1043 | * This function deals with physical dma read requests (for adapters that do not support | |
1044 | * physical dma in hardware). Mostly just here for debugging... | |
1045 | */ | |
a237f35f SR |
1046 | static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid, |
1047 | quadlet_t *data, u64 addr, size_t length, | |
1048 | u16 flags) | |
1da177e4 LT |
1049 | { |
1050 | ||
a237f35f SR |
1051 | /* |
1052 | * Grab data from memory and send a read response. | |
1053 | */ | |
1054 | memcpy(data, bus_to_virt((u32) addr), length); | |
1055 | sbp2util_packet_dump(data, length, "sbp2 phys dma read by device", | |
1056 | (u32) addr); | |
1057 | return RCODE_COMPLETE; | |
1da177e4 LT |
1058 | } |
1059 | #endif | |
1060 | ||
1da177e4 LT |
1061 | /************************************** |
1062 | * SBP-2 protocol related section | |
1063 | **************************************/ | |
1064 | ||
1da177e4 LT |
1065 | /* |
1066 | * This function queries the device for the maximum concurrent logins it | |
1067 | * supports. | |
1068 | */ | |
1069 | static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id) | |
1070 | { | |
1071 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1072 | quadlet_t data[2]; | |
1073 | int max_logins; | |
1074 | int active_logins; | |
1075 | ||
1076 | SBP2_DEBUG("sbp2_query_logins"); | |
1077 | ||
1078 | scsi_id->query_logins_orb->reserved1 = 0x0; | |
1079 | scsi_id->query_logins_orb->reserved2 = 0x0; | |
1080 | ||
1081 | scsi_id->query_logins_orb->query_response_lo = scsi_id->query_logins_response_dma; | |
1082 | scsi_id->query_logins_orb->query_response_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1083 | SBP2_DEBUG("sbp2_query_logins: query_response_hi/lo initialized"); | |
1084 | ||
1085 | scsi_id->query_logins_orb->lun_misc = ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST); | |
1086 | scsi_id->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1); | |
e309fc6d | 1087 | scsi_id->query_logins_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_lun); |
1da177e4 LT |
1088 | SBP2_DEBUG("sbp2_query_logins: lun_misc initialized"); |
1089 | ||
1090 | scsi_id->query_logins_orb->reserved_resp_length = | |
1091 | ORB_SET_QUERY_LOGINS_RESP_LENGTH(sizeof(struct sbp2_query_logins_response)); | |
1092 | SBP2_DEBUG("sbp2_query_logins: reserved_resp_length initialized"); | |
1093 | ||
35bdddb8 SR |
1094 | scsi_id->query_logins_orb->status_fifo_hi = |
1095 | ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id); | |
1096 | scsi_id->query_logins_orb->status_fifo_lo = | |
1097 | ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr); | |
1da177e4 LT |
1098 | |
1099 | sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb)); | |
1100 | ||
1101 | SBP2_DEBUG("sbp2_query_logins: orb byte-swapped"); | |
1102 | ||
1103 | sbp2util_packet_dump(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb), | |
1104 | "sbp2 query logins orb", scsi_id->query_logins_orb_dma); | |
1105 | ||
1106 | memset(scsi_id->query_logins_response, 0, sizeof(struct sbp2_query_logins_response)); | |
1107 | memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); | |
1108 | ||
1109 | SBP2_DEBUG("sbp2_query_logins: query_logins_response/status FIFO memset"); | |
1110 | ||
1111 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); | |
1112 | data[1] = scsi_id->query_logins_orb_dma; | |
1113 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1114 | ||
1115 | atomic_set(&scsi_id->sbp2_login_complete, 0); | |
1116 | ||
1117 | SBP2_DEBUG("sbp2_query_logins: prepared to write"); | |
1118 | hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8); | |
1119 | SBP2_DEBUG("sbp2_query_logins: written"); | |
1120 | ||
1121 | if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 2*HZ)) { | |
1122 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); | |
a237f35f | 1123 | return -EIO; |
1da177e4 LT |
1124 | } |
1125 | ||
1126 | if (scsi_id->status_block.ORB_offset_lo != scsi_id->query_logins_orb_dma) { | |
1127 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); | |
a237f35f | 1128 | return -EIO; |
1da177e4 LT |
1129 | } |
1130 | ||
1131 | if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) || | |
1132 | STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) || | |
1133 | STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) { | |
1134 | ||
1135 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); | |
a237f35f | 1136 | return -EIO; |
1da177e4 LT |
1137 | } |
1138 | ||
1139 | sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_response, sizeof(struct sbp2_query_logins_response)); | |
1140 | ||
1141 | SBP2_DEBUG("length_max_logins = %x", | |
1142 | (unsigned int)scsi_id->query_logins_response->length_max_logins); | |
1143 | ||
1144 | SBP2_DEBUG("Query logins to SBP-2 device successful"); | |
1145 | ||
1146 | max_logins = RESPONSE_GET_MAX_LOGINS(scsi_id->query_logins_response->length_max_logins); | |
1147 | SBP2_DEBUG("Maximum concurrent logins supported: %d", max_logins); | |
1148 | ||
1149 | active_logins = RESPONSE_GET_ACTIVE_LOGINS(scsi_id->query_logins_response->length_max_logins); | |
1150 | SBP2_DEBUG("Number of active logins: %d", active_logins); | |
1151 | ||
1152 | if (active_logins >= max_logins) { | |
a237f35f | 1153 | return -EIO; |
1da177e4 LT |
1154 | } |
1155 | ||
1156 | return 0; | |
1157 | } | |
1158 | ||
1159 | /* | |
1160 | * This function is called in order to login to a particular SBP-2 device, | |
1161 | * after a bus reset. | |
1162 | */ | |
1163 | static int sbp2_login_device(struct scsi_id_instance_data *scsi_id) | |
1164 | { | |
1165 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1166 | quadlet_t data[2]; | |
1167 | ||
1168 | SBP2_DEBUG("sbp2_login_device"); | |
1169 | ||
1170 | if (!scsi_id->login_orb) { | |
1171 | SBP2_DEBUG("sbp2_login_device: login_orb not alloc'd!"); | |
a237f35f | 1172 | return -EIO; |
1da177e4 LT |
1173 | } |
1174 | ||
1175 | if (!exclusive_login) { | |
1176 | if (sbp2_query_logins(scsi_id)) { | |
1177 | SBP2_INFO("Device does not support any more concurrent logins"); | |
a237f35f | 1178 | return -EIO; |
1da177e4 LT |
1179 | } |
1180 | } | |
1181 | ||
1182 | /* Set-up login ORB, assume no password */ | |
1183 | scsi_id->login_orb->password_hi = 0; | |
1184 | scsi_id->login_orb->password_lo = 0; | |
1185 | SBP2_DEBUG("sbp2_login_device: password_hi/lo initialized"); | |
1186 | ||
1187 | scsi_id->login_orb->login_response_lo = scsi_id->login_response_dma; | |
1188 | scsi_id->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1189 | SBP2_DEBUG("sbp2_login_device: login_response_hi/lo initialized"); | |
1190 | ||
1191 | scsi_id->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST); | |
1192 | scsi_id->login_orb->lun_misc |= ORB_SET_RECONNECT(0); /* One second reconnect time */ | |
1193 | scsi_id->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(exclusive_login); /* Exclusive access to device */ | |
1194 | scsi_id->login_orb->lun_misc |= ORB_SET_NOTIFY(1); /* Notify us of login complete */ | |
e309fc6d | 1195 | scsi_id->login_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_lun); |
1da177e4 LT |
1196 | SBP2_DEBUG("sbp2_login_device: lun_misc initialized"); |
1197 | ||
1198 | scsi_id->login_orb->passwd_resp_lengths = | |
1199 | ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response)); | |
1200 | SBP2_DEBUG("sbp2_login_device: passwd_resp_lengths initialized"); | |
1201 | ||
35bdddb8 SR |
1202 | scsi_id->login_orb->status_fifo_hi = |
1203 | ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id); | |
1204 | scsi_id->login_orb->status_fifo_lo = | |
1205 | ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr); | |
1da177e4 LT |
1206 | |
1207 | /* | |
1208 | * Byte swap ORB if necessary | |
1209 | */ | |
1210 | sbp2util_cpu_to_be32_buffer(scsi_id->login_orb, sizeof(struct sbp2_login_orb)); | |
1211 | ||
1212 | SBP2_DEBUG("sbp2_login_device: orb byte-swapped"); | |
1213 | ||
1214 | sbp2util_packet_dump(scsi_id->login_orb, sizeof(struct sbp2_login_orb), | |
1215 | "sbp2 login orb", scsi_id->login_orb_dma); | |
1216 | ||
1217 | /* | |
1218 | * Initialize login response and status fifo | |
1219 | */ | |
1220 | memset(scsi_id->login_response, 0, sizeof(struct sbp2_login_response)); | |
1221 | memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); | |
1222 | ||
1223 | SBP2_DEBUG("sbp2_login_device: login_response/status FIFO memset"); | |
1224 | ||
1225 | /* | |
1226 | * Ok, let's write to the target's management agent register | |
1227 | */ | |
1228 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); | |
1229 | data[1] = scsi_id->login_orb_dma; | |
1230 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1231 | ||
1232 | atomic_set(&scsi_id->sbp2_login_complete, 0); | |
1233 | ||
1234 | SBP2_DEBUG("sbp2_login_device: prepared to write to %08x", | |
1235 | (unsigned int)scsi_id->sbp2_management_agent_addr); | |
1236 | hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8); | |
1237 | SBP2_DEBUG("sbp2_login_device: written"); | |
1238 | ||
1239 | /* | |
1240 | * Wait for login status (up to 20 seconds)... | |
1241 | */ | |
1242 | if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 20*HZ)) { | |
1243 | SBP2_ERR("Error logging into SBP-2 device - login timed-out"); | |
a237f35f | 1244 | return -EIO; |
1da177e4 LT |
1245 | } |
1246 | ||
1247 | /* | |
1248 | * Sanity. Make sure status returned matches login orb. | |
1249 | */ | |
1250 | if (scsi_id->status_block.ORB_offset_lo != scsi_id->login_orb_dma) { | |
1251 | SBP2_ERR("Error logging into SBP-2 device - login timed-out"); | |
a237f35f | 1252 | return -EIO; |
1da177e4 LT |
1253 | } |
1254 | ||
1255 | /* | |
1256 | * Check status | |
1257 | */ | |
1258 | if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) || | |
1259 | STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) || | |
1260 | STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) { | |
1261 | ||
1262 | SBP2_ERR("Error logging into SBP-2 device - login failed"); | |
a237f35f | 1263 | return -EIO; |
1da177e4 LT |
1264 | } |
1265 | ||
1266 | /* | |
1267 | * Byte swap the login response, for use when reconnecting or | |
1268 | * logging out. | |
1269 | */ | |
1270 | sbp2util_cpu_to_be32_buffer(scsi_id->login_response, sizeof(struct sbp2_login_response)); | |
1271 | ||
1272 | /* | |
1273 | * Grab our command block agent address from the login response. | |
1274 | */ | |
1275 | SBP2_DEBUG("command_block_agent_hi = %x", | |
1276 | (unsigned int)scsi_id->login_response->command_block_agent_hi); | |
1277 | SBP2_DEBUG("command_block_agent_lo = %x", | |
1278 | (unsigned int)scsi_id->login_response->command_block_agent_lo); | |
1279 | ||
1280 | scsi_id->sbp2_command_block_agent_addr = | |
1281 | ((u64)scsi_id->login_response->command_block_agent_hi) << 32; | |
1282 | scsi_id->sbp2_command_block_agent_addr |= ((u64)scsi_id->login_response->command_block_agent_lo); | |
1283 | scsi_id->sbp2_command_block_agent_addr &= 0x0000ffffffffffffULL; | |
1284 | ||
1285 | SBP2_INFO("Logged into SBP-2 device"); | |
1286 | ||
a237f35f | 1287 | return 0; |
1da177e4 LT |
1288 | |
1289 | } | |
1290 | ||
1291 | /* | |
1292 | * This function is called in order to logout from a particular SBP-2 | |
1293 | * device, usually called during driver unload. | |
1294 | */ | |
1295 | static int sbp2_logout_device(struct scsi_id_instance_data *scsi_id) | |
1296 | { | |
1297 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1298 | quadlet_t data[2]; | |
1299 | int error; | |
1300 | ||
1301 | SBP2_DEBUG("sbp2_logout_device"); | |
1302 | ||
1303 | /* | |
1304 | * Set-up logout ORB | |
1305 | */ | |
1306 | scsi_id->logout_orb->reserved1 = 0x0; | |
1307 | scsi_id->logout_orb->reserved2 = 0x0; | |
1308 | scsi_id->logout_orb->reserved3 = 0x0; | |
1309 | scsi_id->logout_orb->reserved4 = 0x0; | |
1310 | ||
1311 | scsi_id->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST); | |
1312 | scsi_id->logout_orb->login_ID_misc |= ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID); | |
1313 | ||
1314 | /* Notify us when complete */ | |
1315 | scsi_id->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1); | |
1316 | ||
1317 | scsi_id->logout_orb->reserved5 = 0x0; | |
35bdddb8 SR |
1318 | scsi_id->logout_orb->status_fifo_hi = |
1319 | ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id); | |
1320 | scsi_id->logout_orb->status_fifo_lo = | |
1321 | ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr); | |
1da177e4 LT |
1322 | |
1323 | /* | |
1324 | * Byte swap ORB if necessary | |
1325 | */ | |
1326 | sbp2util_cpu_to_be32_buffer(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb)); | |
1327 | ||
1328 | sbp2util_packet_dump(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb), | |
1329 | "sbp2 logout orb", scsi_id->logout_orb_dma); | |
1330 | ||
1331 | /* | |
1332 | * Ok, let's write to the target's management agent register | |
1333 | */ | |
1334 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); | |
1335 | data[1] = scsi_id->logout_orb_dma; | |
1336 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1337 | ||
1338 | atomic_set(&scsi_id->sbp2_login_complete, 0); | |
1339 | ||
1340 | error = hpsb_node_write(scsi_id->ne, | |
a237f35f | 1341 | scsi_id->sbp2_management_agent_addr, data, 8); |
1da177e4 LT |
1342 | if (error) |
1343 | return error; | |
1344 | ||
1345 | /* Wait for device to logout...1 second. */ | |
1346 | if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ)) | |
1347 | return -EIO; | |
1348 | ||
1349 | SBP2_INFO("Logged out of SBP-2 device"); | |
1350 | ||
a237f35f | 1351 | return 0; |
1da177e4 LT |
1352 | |
1353 | } | |
1354 | ||
1355 | /* | |
1356 | * This function is called in order to reconnect to a particular SBP-2 | |
1357 | * device, after a bus reset. | |
1358 | */ | |
1359 | static int sbp2_reconnect_device(struct scsi_id_instance_data *scsi_id) | |
1360 | { | |
1361 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1362 | quadlet_t data[2]; | |
1363 | int error; | |
1364 | ||
1365 | SBP2_DEBUG("sbp2_reconnect_device"); | |
1366 | ||
1367 | /* | |
1368 | * Set-up reconnect ORB | |
1369 | */ | |
1370 | scsi_id->reconnect_orb->reserved1 = 0x0; | |
1371 | scsi_id->reconnect_orb->reserved2 = 0x0; | |
1372 | scsi_id->reconnect_orb->reserved3 = 0x0; | |
1373 | scsi_id->reconnect_orb->reserved4 = 0x0; | |
1374 | ||
1375 | scsi_id->reconnect_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST); | |
1376 | scsi_id->reconnect_orb->login_ID_misc |= | |
1377 | ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID); | |
1378 | ||
1379 | /* Notify us when complete */ | |
1380 | scsi_id->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1); | |
1381 | ||
1382 | scsi_id->reconnect_orb->reserved5 = 0x0; | |
35bdddb8 SR |
1383 | scsi_id->reconnect_orb->status_fifo_hi = |
1384 | ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id); | |
1385 | scsi_id->reconnect_orb->status_fifo_lo = | |
1386 | ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr); | |
1da177e4 LT |
1387 | |
1388 | /* | |
1389 | * Byte swap ORB if necessary | |
1390 | */ | |
1391 | sbp2util_cpu_to_be32_buffer(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb)); | |
1392 | ||
1393 | sbp2util_packet_dump(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb), | |
1394 | "sbp2 reconnect orb", scsi_id->reconnect_orb_dma); | |
1395 | ||
1396 | /* | |
1397 | * Initialize status fifo | |
1398 | */ | |
1399 | memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); | |
1400 | ||
1401 | /* | |
1402 | * Ok, let's write to the target's management agent register | |
1403 | */ | |
1404 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); | |
1405 | data[1] = scsi_id->reconnect_orb_dma; | |
1406 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1407 | ||
1408 | atomic_set(&scsi_id->sbp2_login_complete, 0); | |
1409 | ||
1410 | error = hpsb_node_write(scsi_id->ne, | |
a237f35f | 1411 | scsi_id->sbp2_management_agent_addr, data, 8); |
1da177e4 LT |
1412 | if (error) |
1413 | return error; | |
1414 | ||
1415 | /* | |
1416 | * Wait for reconnect status (up to 1 second)... | |
1417 | */ | |
1418 | if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ)) { | |
1419 | SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out"); | |
a237f35f | 1420 | return -EIO; |
1da177e4 LT |
1421 | } |
1422 | ||
1423 | /* | |
1424 | * Sanity. Make sure status returned matches reconnect orb. | |
1425 | */ | |
1426 | if (scsi_id->status_block.ORB_offset_lo != scsi_id->reconnect_orb_dma) { | |
1427 | SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out"); | |
a237f35f | 1428 | return -EIO; |
1da177e4 LT |
1429 | } |
1430 | ||
1431 | /* | |
1432 | * Check status | |
1433 | */ | |
1434 | if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) || | |
1435 | STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) || | |
1436 | STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) { | |
1437 | ||
1438 | SBP2_ERR("Error reconnecting to SBP-2 device - reconnect failed"); | |
a237f35f | 1439 | return -EIO; |
1da177e4 LT |
1440 | } |
1441 | ||
1442 | HPSB_DEBUG("Reconnected to SBP-2 device"); | |
1443 | ||
a237f35f | 1444 | return 0; |
1da177e4 LT |
1445 | |
1446 | } | |
1447 | ||
1448 | /* | |
1449 | * This function is called in order to set the busy timeout (number of | |
1450 | * retries to attempt) on the sbp2 device. | |
1451 | */ | |
1452 | static int sbp2_set_busy_timeout(struct scsi_id_instance_data *scsi_id) | |
1453 | { | |
1454 | quadlet_t data; | |
1455 | ||
1456 | SBP2_DEBUG("sbp2_set_busy_timeout"); | |
1457 | ||
1458 | /* | |
1459 | * Ok, let's write to the target's busy timeout register | |
1460 | */ | |
1461 | data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE); | |
1462 | ||
1463 | if (hpsb_node_write(scsi_id->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4)) { | |
1464 | SBP2_ERR("sbp2_set_busy_timeout error"); | |
1465 | } | |
1466 | ||
a237f35f | 1467 | return 0; |
1da177e4 LT |
1468 | } |
1469 | ||
1da177e4 LT |
1470 | /* |
1471 | * This function is called to parse sbp2 device's config rom unit | |
1472 | * directory. Used to determine things like sbp2 management agent offset, | |
1473 | * and command set used (SCSI or RBC). | |
1474 | */ | |
1475 | static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id, | |
1476 | struct unit_directory *ud) | |
1477 | { | |
1478 | struct csr1212_keyval *kv; | |
1479 | struct csr1212_dentry *dentry; | |
1480 | u64 management_agent_addr; | |
1481 | u32 command_set_spec_id, command_set, unit_characteristics, | |
a237f35f | 1482 | firmware_revision, workarounds; |
1da177e4 LT |
1483 | int i; |
1484 | ||
1485 | SBP2_DEBUG("sbp2_parse_unit_directory"); | |
1486 | ||
1487 | management_agent_addr = 0x0; | |
1488 | command_set_spec_id = 0x0; | |
1489 | command_set = 0x0; | |
1490 | unit_characteristics = 0x0; | |
1491 | firmware_revision = 0x0; | |
1492 | ||
1493 | /* Handle different fields in the unit directory, based on keys */ | |
1494 | csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) { | |
1495 | switch (kv->key.id) { | |
1496 | case CSR1212_KV_ID_DEPENDENT_INFO: | |
1497 | if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET) { | |
1498 | /* Save off the management agent address */ | |
1499 | management_agent_addr = | |
a237f35f SR |
1500 | CSR1212_REGISTER_SPACE_BASE + |
1501 | (kv->value.csr_offset << 2); | |
1da177e4 LT |
1502 | |
1503 | SBP2_DEBUG("sbp2_management_agent_addr = %x", | |
a237f35f | 1504 | (unsigned int)management_agent_addr); |
1da177e4 | 1505 | } else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { |
a237f35f SR |
1506 | scsi_id->sbp2_lun = |
1507 | ORB_SET_LUN(kv->value.immediate); | |
1da177e4 LT |
1508 | } |
1509 | break; | |
1510 | ||
1511 | case SBP2_COMMAND_SET_SPEC_ID_KEY: | |
1512 | /* Command spec organization */ | |
1513 | command_set_spec_id = kv->value.immediate; | |
1514 | SBP2_DEBUG("sbp2_command_set_spec_id = %x", | |
a237f35f | 1515 | (unsigned int)command_set_spec_id); |
1da177e4 LT |
1516 | break; |
1517 | ||
1518 | case SBP2_COMMAND_SET_KEY: | |
1519 | /* Command set used by sbp2 device */ | |
1520 | command_set = kv->value.immediate; | |
1521 | SBP2_DEBUG("sbp2_command_set = %x", | |
a237f35f | 1522 | (unsigned int)command_set); |
1da177e4 LT |
1523 | break; |
1524 | ||
1525 | case SBP2_UNIT_CHARACTERISTICS_KEY: | |
1526 | /* | |
1527 | * Unit characterisitcs (orb related stuff | |
1528 | * that I'm not yet paying attention to) | |
1529 | */ | |
1530 | unit_characteristics = kv->value.immediate; | |
1531 | SBP2_DEBUG("sbp2_unit_characteristics = %x", | |
a237f35f | 1532 | (unsigned int)unit_characteristics); |
1da177e4 LT |
1533 | break; |
1534 | ||
1535 | case SBP2_FIRMWARE_REVISION_KEY: | |
1536 | /* Firmware revision */ | |
1537 | firmware_revision = kv->value.immediate; | |
1538 | if (force_inquiry_hack) | |
1539 | SBP2_INFO("sbp2_firmware_revision = %x", | |
a237f35f SR |
1540 | (unsigned int)firmware_revision); |
1541 | else | |
1542 | SBP2_DEBUG("sbp2_firmware_revision = %x", | |
1543 | (unsigned int)firmware_revision); | |
1da177e4 LT |
1544 | break; |
1545 | ||
1546 | default: | |
1547 | break; | |
1548 | } | |
1549 | } | |
1550 | ||
1551 | /* This is the start of our broken device checking. We try to hack | |
1552 | * around oddities and known defects. */ | |
1553 | workarounds = 0x0; | |
1554 | ||
1555 | /* If the vendor id is 0xa0b8 (Symbios vendor id), then we have a | |
1556 | * bridge with 128KB max transfer size limitation. For sanity, we | |
1557 | * only voice this when the current max_sectors setting | |
1558 | * exceeds the 128k limit. By default, that is not the case. | |
1559 | * | |
1560 | * It would be really nice if we could detect this before the scsi | |
1561 | * host gets initialized. That way we can down-force the | |
1562 | * max_sectors to account for it. That is not currently | |
1563 | * possible. */ | |
1564 | if ((firmware_revision & 0xffff00) == | |
1565 | SBP2_128KB_BROKEN_FIRMWARE && | |
1566 | (max_sectors * 512) > (128*1024)) { | |
1567 | SBP2_WARN("Node " NODE_BUS_FMT ": Bridge only supports 128KB max transfer size.", | |
1568 | NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid)); | |
1569 | SBP2_WARN("WARNING: Current max_sectors setting is larger than 128KB (%d sectors)!", | |
1570 | max_sectors); | |
1571 | workarounds |= SBP2_BREAKAGE_128K_MAX_TRANSFER; | |
1572 | } | |
1573 | ||
1574 | /* Check for a blacklisted set of devices that require us to force | |
1575 | * a 36 byte host inquiry. This can be overriden as a module param | |
1576 | * (to force all hosts). */ | |
a80614d1 | 1577 | for (i = 0; i < ARRAY_SIZE(sbp2_broken_inquiry_list); i++) { |
1da177e4 LT |
1578 | if ((firmware_revision & 0xffff00) == |
1579 | sbp2_broken_inquiry_list[i]) { | |
1580 | SBP2_WARN("Node " NODE_BUS_FMT ": Using 36byte inquiry workaround", | |
1581 | NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid)); | |
1582 | workarounds |= SBP2_BREAKAGE_INQUIRY_HACK; | |
1583 | break; /* No need to continue. */ | |
1584 | } | |
1585 | } | |
1586 | ||
1587 | /* If this is a logical unit directory entry, process the parent | |
1588 | * to get the values. */ | |
1589 | if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) { | |
1590 | struct unit_directory *parent_ud = | |
1591 | container_of(ud->device.parent, struct unit_directory, device); | |
1592 | sbp2_parse_unit_directory(scsi_id, parent_ud); | |
1593 | } else { | |
1594 | scsi_id->sbp2_management_agent_addr = management_agent_addr; | |
1595 | scsi_id->sbp2_command_set_spec_id = command_set_spec_id; | |
1596 | scsi_id->sbp2_command_set = command_set; | |
1597 | scsi_id->sbp2_unit_characteristics = unit_characteristics; | |
1598 | scsi_id->sbp2_firmware_revision = firmware_revision; | |
1599 | scsi_id->workarounds = workarounds; | |
1600 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN) | |
e309fc6d | 1601 | scsi_id->sbp2_lun = ORB_SET_LUN(ud->lun); |
1da177e4 LT |
1602 | } |
1603 | } | |
1604 | ||
1605 | /* | |
1606 | * This function is called in order to determine the max speed and packet | |
1607 | * size we can use in our ORBs. Note, that we (the driver and host) only | |
1608 | * initiate the transaction. The SBP-2 device actually transfers the data | |
1609 | * (by reading from the DMA area we tell it). This means that the SBP-2 | |
1610 | * device decides the actual maximum data it can transfer. We just tell it | |
1611 | * the speed that it needs to use, and the max_rec the host supports, and | |
1612 | * it takes care of the rest. | |
1613 | */ | |
1614 | static int sbp2_max_speed_and_size(struct scsi_id_instance_data *scsi_id) | |
1615 | { | |
1616 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1617 | ||
1618 | SBP2_DEBUG("sbp2_max_speed_and_size"); | |
1619 | ||
1620 | /* Initial setting comes from the hosts speed map */ | |
a237f35f SR |
1621 | scsi_id->speed_code = |
1622 | hi->host->speed_map[NODEID_TO_NODE(hi->host->node_id) * 64 + | |
1623 | NODEID_TO_NODE(scsi_id->ne->nodeid)]; | |
1da177e4 LT |
1624 | |
1625 | /* Bump down our speed if the user requested it */ | |
1626 | if (scsi_id->speed_code > max_speed) { | |
1627 | scsi_id->speed_code = max_speed; | |
1628 | SBP2_ERR("Forcing SBP-2 max speed down to %s", | |
1629 | hpsb_speedto_str[scsi_id->speed_code]); | |
1630 | } | |
1631 | ||
1632 | /* Payload size is the lesser of what our speed supports and what | |
1633 | * our host supports. */ | |
a237f35f SR |
1634 | scsi_id->max_payload_size = |
1635 | min(sbp2_speedto_max_payload[scsi_id->speed_code], | |
1636 | (u8) (hi->host->csr.max_rec - 1)); | |
1da177e4 LT |
1637 | |
1638 | HPSB_DEBUG("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]", | |
1639 | NODE_BUS_ARGS(hi->host, scsi_id->ne->nodeid), | |
1640 | hpsb_speedto_str[scsi_id->speed_code], | |
a237f35f | 1641 | 1 << ((u32) scsi_id->max_payload_size + 2)); |
1da177e4 | 1642 | |
a237f35f | 1643 | return 0; |
1da177e4 LT |
1644 | } |
1645 | ||
1646 | /* | |
1647 | * This function is called in order to perform a SBP-2 agent reset. | |
1648 | */ | |
1649 | static int sbp2_agent_reset(struct scsi_id_instance_data *scsi_id, int wait) | |
1650 | { | |
1651 | quadlet_t data; | |
1652 | u64 addr; | |
1653 | int retval; | |
1654 | ||
1655 | SBP2_DEBUG("sbp2_agent_reset"); | |
1656 | ||
1657 | /* | |
1658 | * Ok, let's write to the target's management agent register | |
1659 | */ | |
1660 | data = ntohl(SBP2_AGENT_RESET_DATA); | |
1661 | addr = scsi_id->sbp2_command_block_agent_addr + SBP2_AGENT_RESET_OFFSET; | |
1662 | ||
1663 | if (wait) | |
1664 | retval = hpsb_node_write(scsi_id->ne, addr, &data, 4); | |
1665 | else | |
1666 | retval = sbp2util_node_write_no_wait(scsi_id->ne, addr, &data, 4); | |
1667 | ||
1668 | if (retval < 0) { | |
1669 | SBP2_ERR("hpsb_node_write failed.\n"); | |
1670 | return -EIO; | |
1671 | } | |
1672 | ||
1673 | /* | |
1674 | * Need to make sure orb pointer is written on next command | |
1675 | */ | |
1676 | scsi_id->last_orb = NULL; | |
1677 | ||
a237f35f | 1678 | return 0; |
1da177e4 LT |
1679 | } |
1680 | ||
cf8d2c09 SR |
1681 | static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb, |
1682 | struct sbp2scsi_host_info *hi, | |
1683 | struct sbp2_command_info *command, | |
1684 | unsigned int scsi_use_sg, | |
1685 | struct scatterlist *sgpnt, | |
1686 | u32 orb_direction, | |
1687 | enum dma_data_direction dma_dir) | |
1688 | { | |
1689 | command->dma_dir = dma_dir; | |
1690 | orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1691 | orb->misc |= ORB_SET_DIRECTION(orb_direction); | |
1692 | ||
1693 | /* Special case if only one element (and less than 64KB in size) */ | |
1694 | if ((scsi_use_sg == 1) && | |
1695 | (sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) { | |
1696 | ||
1697 | SBP2_DEBUG("Only one s/g element"); | |
1698 | command->dma_size = sgpnt[0].length; | |
1699 | command->dma_type = CMD_DMA_PAGE; | |
1700 | command->cmd_dma = pci_map_page(hi->host->pdev, | |
1701 | sgpnt[0].page, | |
1702 | sgpnt[0].offset, | |
1703 | command->dma_size, | |
1704 | command->dma_dir); | |
1705 | SBP2_DMA_ALLOC("single page scatter element"); | |
1706 | ||
1707 | orb->data_descriptor_lo = command->cmd_dma; | |
1708 | orb->misc |= ORB_SET_DATA_SIZE(command->dma_size); | |
1709 | ||
1710 | } else { | |
1711 | struct sbp2_unrestricted_page_table *sg_element = | |
1712 | &command->scatter_gather_element[0]; | |
1713 | u32 sg_count, sg_len; | |
1714 | dma_addr_t sg_addr; | |
1715 | int i, count = pci_map_sg(hi->host->pdev, sgpnt, scsi_use_sg, | |
1716 | dma_dir); | |
1717 | ||
1718 | SBP2_DMA_ALLOC("scatter list"); | |
1719 | ||
1720 | command->dma_size = scsi_use_sg; | |
1721 | command->sge_buffer = sgpnt; | |
1722 | ||
1723 | /* use page tables (s/g) */ | |
1724 | orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); | |
1725 | orb->data_descriptor_lo = command->sge_dma; | |
1726 | ||
1727 | /* | |
1728 | * Loop through and fill out our sbp-2 page tables | |
1729 | * (and split up anything too large) | |
1730 | */ | |
1731 | for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) { | |
1732 | sg_len = sg_dma_len(sgpnt); | |
1733 | sg_addr = sg_dma_address(sgpnt); | |
1734 | while (sg_len) { | |
1735 | sg_element[sg_count].segment_base_lo = sg_addr; | |
1736 | if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { | |
1737 | sg_element[sg_count].length_segment_base_hi = | |
1738 | PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); | |
1739 | sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; | |
1740 | sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; | |
1741 | } else { | |
1742 | sg_element[sg_count].length_segment_base_hi = | |
1743 | PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); | |
1744 | sg_len = 0; | |
1745 | } | |
1746 | sg_count++; | |
1747 | } | |
1748 | } | |
1749 | ||
1750 | /* Number of page table (s/g) elements */ | |
1751 | orb->misc |= ORB_SET_DATA_SIZE(sg_count); | |
1752 | ||
1753 | sbp2util_packet_dump(sg_element, | |
1754 | (sizeof(struct sbp2_unrestricted_page_table)) * sg_count, | |
1755 | "sbp2 s/g list", command->sge_dma); | |
1756 | ||
1757 | /* Byte swap page tables if necessary */ | |
1758 | sbp2util_cpu_to_be32_buffer(sg_element, | |
1759 | (sizeof(struct sbp2_unrestricted_page_table)) * | |
1760 | sg_count); | |
1761 | } | |
1762 | } | |
1763 | ||
1764 | static void sbp2_prep_command_orb_no_sg(struct sbp2_command_orb *orb, | |
1765 | struct sbp2scsi_host_info *hi, | |
1766 | struct sbp2_command_info *command, | |
1767 | struct scatterlist *sgpnt, | |
1768 | u32 orb_direction, | |
1769 | unsigned int scsi_request_bufflen, | |
1770 | void *scsi_request_buffer, | |
1771 | enum dma_data_direction dma_dir) | |
1772 | { | |
1773 | command->dma_dir = dma_dir; | |
1774 | command->dma_size = scsi_request_bufflen; | |
1775 | command->dma_type = CMD_DMA_SINGLE; | |
1776 | command->cmd_dma = pci_map_single(hi->host->pdev, scsi_request_buffer, | |
1777 | command->dma_size, command->dma_dir); | |
1778 | orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1779 | orb->misc |= ORB_SET_DIRECTION(orb_direction); | |
1780 | ||
1781 | SBP2_DMA_ALLOC("single bulk"); | |
1782 | ||
1783 | /* | |
1784 | * Handle case where we get a command w/o s/g enabled (but | |
1785 | * check for transfers larger than 64K) | |
1786 | */ | |
1787 | if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) { | |
1788 | ||
1789 | orb->data_descriptor_lo = command->cmd_dma; | |
1790 | orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen); | |
1791 | ||
1792 | } else { | |
1793 | struct sbp2_unrestricted_page_table *sg_element = | |
1794 | &command->scatter_gather_element[0]; | |
1795 | u32 sg_count, sg_len; | |
1796 | dma_addr_t sg_addr; | |
1797 | ||
1798 | /* | |
1799 | * Need to turn this into page tables, since the | |
1800 | * buffer is too large. | |
1801 | */ | |
1802 | orb->data_descriptor_lo = command->sge_dma; | |
1803 | ||
1804 | /* Use page tables (s/g) */ | |
1805 | orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); | |
1806 | ||
1807 | /* | |
1808 | * fill out our sbp-2 page tables (and split up | |
1809 | * the large buffer) | |
1810 | */ | |
1811 | sg_count = 0; | |
1812 | sg_len = scsi_request_bufflen; | |
1813 | sg_addr = command->cmd_dma; | |
1814 | while (sg_len) { | |
1815 | sg_element[sg_count].segment_base_lo = sg_addr; | |
1816 | if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { | |
1817 | sg_element[sg_count].length_segment_base_hi = | |
1818 | PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); | |
1819 | sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; | |
1820 | sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; | |
1821 | } else { | |
1822 | sg_element[sg_count].length_segment_base_hi = | |
1823 | PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); | |
1824 | sg_len = 0; | |
1825 | } | |
1826 | sg_count++; | |
1827 | } | |
1828 | ||
1829 | /* Number of page table (s/g) elements */ | |
1830 | orb->misc |= ORB_SET_DATA_SIZE(sg_count); | |
1831 | ||
1832 | sbp2util_packet_dump(sg_element, | |
1833 | (sizeof(struct sbp2_unrestricted_page_table)) * sg_count, | |
1834 | "sbp2 s/g list", command->sge_dma); | |
1835 | ||
1836 | /* Byte swap page tables if necessary */ | |
1837 | sbp2util_cpu_to_be32_buffer(sg_element, | |
1838 | (sizeof(struct sbp2_unrestricted_page_table)) * | |
1839 | sg_count); | |
1840 | } | |
1841 | } | |
1842 | ||
1da177e4 LT |
1843 | /* |
1844 | * This function is called to create the actual command orb and s/g list | |
1845 | * out of the scsi command itself. | |
1846 | */ | |
cf8d2c09 SR |
1847 | static void sbp2_create_command_orb(struct scsi_id_instance_data *scsi_id, |
1848 | struct sbp2_command_info *command, | |
1849 | unchar *scsi_cmd, | |
1850 | unsigned int scsi_use_sg, | |
1851 | unsigned int scsi_request_bufflen, | |
1852 | void *scsi_request_buffer, | |
1853 | enum dma_data_direction dma_dir) | |
1da177e4 LT |
1854 | { |
1855 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
a237f35f | 1856 | struct scatterlist *sgpnt = (struct scatterlist *)scsi_request_buffer; |
1da177e4 | 1857 | struct sbp2_command_orb *command_orb = &command->command_orb; |
cf8d2c09 | 1858 | u32 orb_direction; |
1da177e4 LT |
1859 | |
1860 | /* | |
1861 | * Set-up our command ORB.. | |
1862 | * | |
1863 | * NOTE: We're doing unrestricted page tables (s/g), as this is | |
1864 | * best performance (at least with the devices I have). This means | |
1865 | * that data_size becomes the number of s/g elements, and | |
1866 | * page_size should be zero (for unrestricted). | |
1867 | */ | |
1868 | command_orb->next_ORB_hi = ORB_SET_NULL_PTR(1); | |
1869 | command_orb->next_ORB_lo = 0x0; | |
1870 | command_orb->misc = ORB_SET_MAX_PAYLOAD(scsi_id->max_payload_size); | |
1871 | command_orb->misc |= ORB_SET_SPEED(scsi_id->speed_code); | |
a237f35f | 1872 | command_orb->misc |= ORB_SET_NOTIFY(1); /* Notify us when complete */ |
1da177e4 | 1873 | |
43863eba | 1874 | if (dma_dir == DMA_NONE) |
a237f35f | 1875 | orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; |
43863eba | 1876 | else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen) |
a237f35f | 1877 | orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA; |
43863eba | 1878 | else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen) |
a237f35f | 1879 | orb_direction = ORB_DIRECTION_READ_FROM_MEDIA; |
43863eba SR |
1880 | else { |
1881 | SBP2_WARN("Falling back to DMA_NONE"); | |
1882 | orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; | |
1da177e4 LT |
1883 | } |
1884 | ||
cf8d2c09 | 1885 | /* Set-up our pagetable stuff */ |
1da177e4 | 1886 | if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) { |
1da177e4 | 1887 | SBP2_DEBUG("No data transfer"); |
1da177e4 LT |
1888 | command_orb->data_descriptor_hi = 0x0; |
1889 | command_orb->data_descriptor_lo = 0x0; | |
1890 | command_orb->misc |= ORB_SET_DIRECTION(1); | |
1da177e4 | 1891 | } else if (scsi_use_sg) { |
1da177e4 | 1892 | SBP2_DEBUG("Use scatter/gather"); |
cf8d2c09 SR |
1893 | sbp2_prep_command_orb_sg(command_orb, hi, command, scsi_use_sg, |
1894 | sgpnt, orb_direction, dma_dir); | |
1da177e4 | 1895 | } else { |
1da177e4 | 1896 | SBP2_DEBUG("No scatter/gather"); |
cf8d2c09 SR |
1897 | sbp2_prep_command_orb_no_sg(command_orb, hi, command, sgpnt, |
1898 | orb_direction, scsi_request_bufflen, | |
1899 | scsi_request_buffer, dma_dir); | |
1da177e4 LT |
1900 | } |
1901 | ||
cf8d2c09 | 1902 | /* Byte swap command ORB if necessary */ |
1da177e4 LT |
1903 | sbp2util_cpu_to_be32_buffer(command_orb, sizeof(struct sbp2_command_orb)); |
1904 | ||
cf8d2c09 | 1905 | /* Put our scsi command in the command ORB */ |
1da177e4 LT |
1906 | memset(command_orb->cdb, 0, 12); |
1907 | memcpy(command_orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd)); | |
1da177e4 LT |
1908 | } |
1909 | ||
1910 | /* | |
1911 | * This function is called in order to begin a regular SBP-2 command. | |
1912 | */ | |
1913 | static int sbp2_link_orb_command(struct scsi_id_instance_data *scsi_id, | |
1914 | struct sbp2_command_info *command) | |
1915 | { | |
1916 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1917 | struct sbp2_command_orb *command_orb = &command->command_orb; | |
1918 | struct node_entry *ne = scsi_id->ne; | |
1919 | u64 addr; | |
1920 | ||
1921 | outstanding_orb_incr; | |
1922 | SBP2_ORB_DEBUG("sending command orb %p, total orbs = %x", | |
a237f35f | 1923 | command_orb, global_outstanding_command_orbs); |
1da177e4 LT |
1924 | |
1925 | pci_dma_sync_single_for_device(hi->host->pdev, command->command_orb_dma, | |
1926 | sizeof(struct sbp2_command_orb), | |
1927 | PCI_DMA_BIDIRECTIONAL); | |
1928 | pci_dma_sync_single_for_device(hi->host->pdev, command->sge_dma, | |
1929 | sizeof(command->scatter_gather_element), | |
1930 | PCI_DMA_BIDIRECTIONAL); | |
1931 | /* | |
1932 | * Check to see if there are any previous orbs to use | |
1933 | */ | |
1934 | if (scsi_id->last_orb == NULL) { | |
1935 | quadlet_t data[2]; | |
1936 | ||
1937 | /* | |
1938 | * Ok, let's write to the target's management agent register | |
1939 | */ | |
1940 | addr = scsi_id->sbp2_command_block_agent_addr + SBP2_ORB_POINTER_OFFSET; | |
1941 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); | |
1942 | data[1] = command->command_orb_dma; | |
1943 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1944 | ||
1945 | SBP2_ORB_DEBUG("write command agent, command orb %p", command_orb); | |
1946 | ||
1947 | if (sbp2util_node_write_no_wait(ne, addr, data, 8) < 0) { | |
1948 | SBP2_ERR("sbp2util_node_write_no_wait failed.\n"); | |
1949 | return -EIO; | |
1950 | } | |
1951 | ||
1952 | SBP2_ORB_DEBUG("write command agent complete"); | |
1953 | ||
1954 | scsi_id->last_orb = command_orb; | |
1955 | scsi_id->last_orb_dma = command->command_orb_dma; | |
1956 | ||
1957 | } else { | |
1958 | quadlet_t data; | |
1959 | ||
1960 | /* | |
1961 | * We have an orb already sent (maybe or maybe not | |
1962 | * processed) that we can append this orb to. So do so, | |
1963 | * and ring the doorbell. Have to be very careful | |
1964 | * modifying these next orb pointers, as they are accessed | |
1965 | * both by the sbp2 device and us. | |
1966 | */ | |
1967 | scsi_id->last_orb->next_ORB_lo = | |
a237f35f | 1968 | cpu_to_be32(command->command_orb_dma); |
1da177e4 LT |
1969 | /* Tells hardware that this pointer is valid */ |
1970 | scsi_id->last_orb->next_ORB_hi = 0x0; | |
a237f35f SR |
1971 | pci_dma_sync_single_for_device(hi->host->pdev, |
1972 | scsi_id->last_orb_dma, | |
1da177e4 LT |
1973 | sizeof(struct sbp2_command_orb), |
1974 | PCI_DMA_BIDIRECTIONAL); | |
1975 | ||
1976 | /* | |
1977 | * Ring the doorbell | |
1978 | */ | |
1979 | data = cpu_to_be32(command->command_orb_dma); | |
1980 | addr = scsi_id->sbp2_command_block_agent_addr + SBP2_DOORBELL_OFFSET; | |
1981 | ||
1982 | SBP2_ORB_DEBUG("ring doorbell, command orb %p", command_orb); | |
1983 | ||
1984 | if (sbp2util_node_write_no_wait(ne, addr, &data, 4) < 0) { | |
1985 | SBP2_ERR("sbp2util_node_write_no_wait failed"); | |
a237f35f | 1986 | return -EIO; |
1da177e4 LT |
1987 | } |
1988 | ||
1989 | scsi_id->last_orb = command_orb; | |
1990 | scsi_id->last_orb_dma = command->command_orb_dma; | |
1991 | ||
1992 | } | |
a237f35f | 1993 | return 0; |
1da177e4 LT |
1994 | } |
1995 | ||
1996 | /* | |
1997 | * This function is called in order to begin a regular SBP-2 command. | |
1998 | */ | |
1999 | static int sbp2_send_command(struct scsi_id_instance_data *scsi_id, | |
2000 | struct scsi_cmnd *SCpnt, | |
2001 | void (*done)(struct scsi_cmnd *)) | |
2002 | { | |
2003 | unchar *cmd = (unchar *) SCpnt->cmnd; | |
2004 | unsigned int request_bufflen = SCpnt->request_bufflen; | |
2005 | struct sbp2_command_info *command; | |
2006 | ||
2007 | SBP2_DEBUG("sbp2_send_command"); | |
2008 | #if (CONFIG_IEEE1394_SBP2_DEBUG >= 2) || defined(CONFIG_IEEE1394_SBP2_PACKET_DUMP) | |
2009 | printk("[scsi command]\n "); | |
2010 | scsi_print_command(SCpnt); | |
2011 | #endif | |
2012 | SBP2_DEBUG("SCSI transfer size = %x", request_bufflen); | |
2013 | SBP2_DEBUG("SCSI s/g elements = %x", (unsigned int)SCpnt->use_sg); | |
2014 | ||
2015 | /* | |
2016 | * Allocate a command orb and s/g structure | |
2017 | */ | |
2018 | command = sbp2util_allocate_command_orb(scsi_id, SCpnt, done); | |
2019 | if (!command) { | |
a237f35f | 2020 | return -EIO; |
1da177e4 LT |
2021 | } |
2022 | ||
1da177e4 LT |
2023 | /* |
2024 | * Now actually fill in the comamnd orb and sbp2 s/g list | |
2025 | */ | |
2026 | sbp2_create_command_orb(scsi_id, command, cmd, SCpnt->use_sg, | |
2027 | request_bufflen, SCpnt->request_buffer, | |
2028 | SCpnt->sc_data_direction); | |
1da177e4 LT |
2029 | |
2030 | sbp2util_packet_dump(&command->command_orb, sizeof(struct sbp2_command_orb), | |
2031 | "sbp2 command orb", command->command_orb_dma); | |
2032 | ||
2033 | /* | |
2034 | * Initialize status fifo | |
2035 | */ | |
2036 | memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); | |
2037 | ||
2038 | /* | |
2039 | * Link up the orb, and ring the doorbell if needed | |
2040 | */ | |
2041 | sbp2_link_orb_command(scsi_id, command); | |
2042 | ||
a237f35f | 2043 | return 0; |
1da177e4 LT |
2044 | } |
2045 | ||
1da177e4 LT |
2046 | /* |
2047 | * Translates SBP-2 status into SCSI sense data for check conditions | |
2048 | */ | |
2049 | static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, unchar *sense_data) | |
2050 | { | |
2051 | SBP2_DEBUG("sbp2_status_to_sense_data"); | |
2052 | ||
2053 | /* | |
2054 | * Ok, it's pretty ugly... ;-) | |
2055 | */ | |
2056 | sense_data[0] = 0x70; | |
2057 | sense_data[1] = 0x0; | |
2058 | sense_data[2] = sbp2_status[9]; | |
2059 | sense_data[3] = sbp2_status[12]; | |
2060 | sense_data[4] = sbp2_status[13]; | |
2061 | sense_data[5] = sbp2_status[14]; | |
2062 | sense_data[6] = sbp2_status[15]; | |
2063 | sense_data[7] = 10; | |
2064 | sense_data[8] = sbp2_status[16]; | |
2065 | sense_data[9] = sbp2_status[17]; | |
2066 | sense_data[10] = sbp2_status[18]; | |
2067 | sense_data[11] = sbp2_status[19]; | |
2068 | sense_data[12] = sbp2_status[10]; | |
2069 | sense_data[13] = sbp2_status[11]; | |
2070 | sense_data[14] = sbp2_status[20]; | |
2071 | sense_data[15] = sbp2_status[21]; | |
2072 | ||
a237f35f | 2073 | return sbp2_status[8] & 0x3f; /* return scsi status */ |
1da177e4 LT |
2074 | } |
2075 | ||
2076 | /* | |
2077 | * This function is called after a command is completed, in order to do any necessary SBP-2 | |
2078 | * response data translations for the SCSI stack | |
2079 | */ | |
a237f35f | 2080 | static void sbp2_check_sbp2_response(struct scsi_id_instance_data *scsi_id, |
1da177e4 LT |
2081 | struct scsi_cmnd *SCpnt) |
2082 | { | |
2083 | u8 *scsi_buf = SCpnt->request_buffer; | |
1da177e4 LT |
2084 | |
2085 | SBP2_DEBUG("sbp2_check_sbp2_response"); | |
2086 | ||
e30809fd | 2087 | if (SCpnt->cmnd[0] == INQUIRY && (SCpnt->cmnd[1] & 3) == 0) { |
a237f35f SR |
2088 | /* |
2089 | * Make sure data length is ok. Minimum length is 36 bytes | |
2090 | */ | |
2091 | if (scsi_buf[4] == 0) { | |
2092 | scsi_buf[4] = 36 - 5; | |
2093 | } | |
1da177e4 | 2094 | |
a237f35f SR |
2095 | /* |
2096 | * Fix ansi revision and response data format | |
2097 | */ | |
2098 | scsi_buf[2] |= 2; | |
2099 | scsi_buf[3] = (scsi_buf[3] & 0xf0) | 2; | |
1da177e4 | 2100 | } |
1da177e4 LT |
2101 | } |
2102 | ||
2103 | /* | |
2104 | * This function deals with status writes from the SBP-2 device | |
2105 | */ | |
2106 | static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, int destid, | |
2107 | quadlet_t *data, u64 addr, size_t length, u16 fl) | |
2108 | { | |
2109 | struct sbp2scsi_host_info *hi; | |
2110 | struct scsi_id_instance_data *scsi_id = NULL, *scsi_id_tmp; | |
1da177e4 LT |
2111 | struct scsi_cmnd *SCpnt = NULL; |
2112 | u32 scsi_status = SBP2_SCSI_STATUS_GOOD; | |
2113 | struct sbp2_command_info *command; | |
79456197 | 2114 | unsigned long flags; |
1da177e4 LT |
2115 | |
2116 | SBP2_DEBUG("sbp2_handle_status_write"); | |
2117 | ||
2118 | sbp2util_packet_dump(data, length, "sbp2 status write by device", (u32)addr); | |
2119 | ||
2120 | if (!host) { | |
2121 | SBP2_ERR("host is NULL - this is bad!"); | |
a237f35f | 2122 | return RCODE_ADDRESS_ERROR; |
1da177e4 LT |
2123 | } |
2124 | ||
2125 | hi = hpsb_get_hostinfo(&sbp2_highlevel, host); | |
2126 | ||
2127 | if (!hi) { | |
2128 | SBP2_ERR("host info is NULL - this is bad!"); | |
a237f35f | 2129 | return RCODE_ADDRESS_ERROR; |
1da177e4 LT |
2130 | } |
2131 | ||
2132 | /* | |
35bdddb8 SR |
2133 | * Find our scsi_id structure by looking at the status fifo address |
2134 | * written to by the sbp2 device. | |
1da177e4 | 2135 | */ |
1da177e4 | 2136 | list_for_each_entry(scsi_id_tmp, &hi->scsi_ids, scsi_list) { |
35bdddb8 SR |
2137 | if (scsi_id_tmp->ne->nodeid == nodeid && |
2138 | scsi_id_tmp->status_fifo_addr == addr) { | |
1da177e4 LT |
2139 | scsi_id = scsi_id_tmp; |
2140 | break; | |
2141 | } | |
2142 | } | |
2143 | ||
2144 | if (!scsi_id) { | |
2145 | SBP2_ERR("scsi_id is NULL - device is gone?"); | |
a237f35f | 2146 | return RCODE_ADDRESS_ERROR; |
1da177e4 LT |
2147 | } |
2148 | ||
2149 | /* | |
2150 | * Put response into scsi_id status fifo... | |
2151 | */ | |
2152 | memcpy(&scsi_id->status_block, data, length); | |
2153 | ||
2154 | /* | |
2155 | * Byte swap first two quadlets (8 bytes) of status for processing | |
2156 | */ | |
2157 | sbp2util_be32_to_cpu_buffer(&scsi_id->status_block, 8); | |
2158 | ||
2159 | /* | |
2160 | * Handle command ORB status here if necessary. First, need to match status with command. | |
2161 | */ | |
2162 | command = sbp2util_find_command_for_orb(scsi_id, scsi_id->status_block.ORB_offset_lo); | |
2163 | if (command) { | |
2164 | ||
2165 | SBP2_DEBUG("Found status for command ORB"); | |
2166 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma, | |
2167 | sizeof(struct sbp2_command_orb), | |
2168 | PCI_DMA_BIDIRECTIONAL); | |
2169 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma, | |
2170 | sizeof(command->scatter_gather_element), | |
2171 | PCI_DMA_BIDIRECTIONAL); | |
2172 | ||
2173 | SBP2_ORB_DEBUG("matched command orb %p", &command->command_orb); | |
2174 | outstanding_orb_decr; | |
2175 | ||
2176 | /* | |
2177 | * Matched status with command, now grab scsi command pointers and check status | |
2178 | */ | |
2179 | SCpnt = command->Current_SCpnt; | |
2180 | sbp2util_mark_command_completed(scsi_id, command); | |
2181 | ||
2182 | if (SCpnt) { | |
2183 | ||
2184 | /* | |
2185 | * See if the target stored any scsi status information | |
2186 | */ | |
2187 | if (STATUS_GET_LENGTH(scsi_id->status_block.ORB_offset_hi_misc) > 1) { | |
2188 | /* | |
2189 | * Translate SBP-2 status to SCSI sense data | |
2190 | */ | |
2191 | SBP2_DEBUG("CHECK CONDITION"); | |
2192 | scsi_status = sbp2_status_to_sense_data((unchar *)&scsi_id->status_block, SCpnt->sense_buffer); | |
2193 | } | |
2194 | ||
2195 | /* | |
2196 | * Check to see if the dead bit is set. If so, we'll have to initiate | |
2197 | * a fetch agent reset. | |
2198 | */ | |
2199 | if (STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc)) { | |
2200 | ||
2201 | /* | |
2202 | * Initiate a fetch agent reset. | |
2203 | */ | |
2204 | SBP2_DEBUG("Dead bit set - initiating fetch agent reset"); | |
2205 | sbp2_agent_reset(scsi_id, 0); | |
2206 | } | |
2207 | ||
2208 | SBP2_ORB_DEBUG("completing command orb %p", &command->command_orb); | |
2209 | } | |
2210 | ||
2211 | /* | |
2212 | * Check here to see if there are no commands in-use. If there are none, we can | |
2213 | * null out last orb so that next time around we write directly to the orb pointer... | |
2214 | * Quick start saves one 1394 bus transaction. | |
2215 | */ | |
79456197 | 2216 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2217 | if (list_empty(&scsi_id->sbp2_command_orb_inuse)) { |
2218 | scsi_id->last_orb = NULL; | |
2219 | } | |
79456197 | 2220 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2221 | |
2222 | } else { | |
2223 | ||
2224 | /* | |
2225 | * It's probably a login/logout/reconnect status. | |
2226 | */ | |
2227 | if ((scsi_id->login_orb_dma == scsi_id->status_block.ORB_offset_lo) || | |
2228 | (scsi_id->query_logins_orb_dma == scsi_id->status_block.ORB_offset_lo) || | |
2229 | (scsi_id->reconnect_orb_dma == scsi_id->status_block.ORB_offset_lo) || | |
2230 | (scsi_id->logout_orb_dma == scsi_id->status_block.ORB_offset_lo)) { | |
2231 | atomic_set(&scsi_id->sbp2_login_complete, 1); | |
2232 | } | |
2233 | } | |
2234 | ||
2235 | if (SCpnt) { | |
2236 | ||
2237 | /* Complete the SCSI command. */ | |
2238 | SBP2_DEBUG("Completing SCSI command"); | |
2239 | sbp2scsi_complete_command(scsi_id, scsi_status, SCpnt, | |
2240 | command->Current_done); | |
2241 | SBP2_ORB_DEBUG("command orb completed"); | |
2242 | } | |
2243 | ||
a237f35f | 2244 | return RCODE_COMPLETE; |
1da177e4 LT |
2245 | } |
2246 | ||
1da177e4 LT |
2247 | /************************************** |
2248 | * SCSI interface related section | |
2249 | **************************************/ | |
2250 | ||
2251 | /* | |
2252 | * This routine is the main request entry routine for doing I/O. It is | |
2253 | * called from the scsi stack directly. | |
2254 | */ | |
2255 | static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt, | |
2256 | void (*done)(struct scsi_cmnd *)) | |
2257 | { | |
2258 | struct scsi_id_instance_data *scsi_id = | |
2259 | (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; | |
2260 | struct sbp2scsi_host_info *hi; | |
abd559b1 | 2261 | int result = DID_NO_CONNECT << 16; |
1da177e4 LT |
2262 | |
2263 | SBP2_DEBUG("sbp2scsi_queuecommand"); | |
2264 | ||
abd559b1 JM |
2265 | if (!sbp2util_node_is_available(scsi_id)) |
2266 | goto done; | |
1da177e4 LT |
2267 | |
2268 | hi = scsi_id->hi; | |
2269 | ||
2270 | if (!hi) { | |
2271 | SBP2_ERR("sbp2scsi_host_info is NULL - this is bad!"); | |
abd559b1 | 2272 | goto done; |
1da177e4 LT |
2273 | } |
2274 | ||
2275 | /* | |
2276 | * Until we handle multiple luns, just return selection time-out | |
2277 | * to any IO directed at non-zero LUNs | |
2278 | */ | |
abd559b1 JM |
2279 | if (SCpnt->device->lun) |
2280 | goto done; | |
1da177e4 LT |
2281 | |
2282 | /* | |
2283 | * Check for request sense command, and handle it here | |
2284 | * (autorequest sense) | |
2285 | */ | |
2286 | if (SCpnt->cmnd[0] == REQUEST_SENSE) { | |
2287 | SBP2_DEBUG("REQUEST_SENSE"); | |
2288 | memcpy(SCpnt->request_buffer, SCpnt->sense_buffer, SCpnt->request_bufflen); | |
2289 | memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer)); | |
2290 | sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_GOOD, SCpnt, done); | |
abd559b1 | 2291 | return 0; |
1da177e4 LT |
2292 | } |
2293 | ||
2294 | /* | |
2295 | * Check to see if we are in the middle of a bus reset. | |
2296 | */ | |
2297 | if (!hpsb_node_entry_valid(scsi_id->ne)) { | |
2298 | SBP2_ERR("Bus reset in progress - rejecting command"); | |
abd559b1 JM |
2299 | result = DID_BUS_BUSY << 16; |
2300 | goto done; | |
1da177e4 LT |
2301 | } |
2302 | ||
43863eba SR |
2303 | /* |
2304 | * Bidirectional commands are not yet implemented, | |
2305 | * and unknown transfer direction not handled. | |
2306 | */ | |
2307 | if (SCpnt->sc_data_direction == DMA_BIDIRECTIONAL) { | |
2308 | SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command"); | |
2309 | result = DID_ERROR << 16; | |
2310 | goto done; | |
2311 | } | |
2312 | ||
1da177e4 LT |
2313 | /* |
2314 | * Try and send our SCSI command | |
2315 | */ | |
2316 | if (sbp2_send_command(scsi_id, SCpnt, done)) { | |
2317 | SBP2_ERR("Error sending SCSI command"); | |
2318 | sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_SELECTION_TIMEOUT, | |
2319 | SCpnt, done); | |
2320 | } | |
abd559b1 | 2321 | return 0; |
1da177e4 | 2322 | |
abd559b1 JM |
2323 | done: |
2324 | SCpnt->result = result; | |
2325 | done(SCpnt); | |
2326 | return 0; | |
1da177e4 LT |
2327 | } |
2328 | ||
2329 | /* | |
2330 | * This function is called in order to complete all outstanding SBP-2 | |
2331 | * commands (in case of resets, etc.). | |
2332 | */ | |
2333 | static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id, | |
2334 | u32 status) | |
2335 | { | |
2336 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
2337 | struct list_head *lh; | |
2338 | struct sbp2_command_info *command; | |
79456197 | 2339 | unsigned long flags; |
1da177e4 LT |
2340 | |
2341 | SBP2_DEBUG("sbp2scsi_complete_all_commands"); | |
2342 | ||
79456197 | 2343 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2344 | while (!list_empty(&scsi_id->sbp2_command_orb_inuse)) { |
2345 | SBP2_DEBUG("Found pending command to complete"); | |
2346 | lh = scsi_id->sbp2_command_orb_inuse.next; | |
2347 | command = list_entry(lh, struct sbp2_command_info, list); | |
2348 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma, | |
2349 | sizeof(struct sbp2_command_orb), | |
2350 | PCI_DMA_BIDIRECTIONAL); | |
2351 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma, | |
2352 | sizeof(command->scatter_gather_element), | |
2353 | PCI_DMA_BIDIRECTIONAL); | |
2354 | sbp2util_mark_command_completed(scsi_id, command); | |
2355 | if (command->Current_SCpnt) { | |
2356 | command->Current_SCpnt->result = status << 16; | |
2357 | command->Current_done(command->Current_SCpnt); | |
2358 | } | |
2359 | } | |
79456197 | 2360 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2361 | |
2362 | return; | |
2363 | } | |
2364 | ||
2365 | /* | |
2366 | * This function is called in order to complete a regular SBP-2 command. | |
2367 | * | |
2368 | * This can be called in interrupt context. | |
2369 | */ | |
2370 | static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id, | |
2371 | u32 scsi_status, struct scsi_cmnd *SCpnt, | |
2372 | void (*done)(struct scsi_cmnd *)) | |
2373 | { | |
1da177e4 LT |
2374 | SBP2_DEBUG("sbp2scsi_complete_command"); |
2375 | ||
2376 | /* | |
2377 | * Sanity | |
2378 | */ | |
2379 | if (!SCpnt) { | |
2380 | SBP2_ERR("SCpnt is NULL"); | |
2381 | return; | |
2382 | } | |
2383 | ||
2384 | /* | |
2385 | * If a bus reset is in progress and there was an error, don't | |
2386 | * complete the command, just let it get retried at the end of the | |
2387 | * bus reset. | |
2388 | */ | |
a237f35f SR |
2389 | if (!hpsb_node_entry_valid(scsi_id->ne) |
2390 | && (scsi_status != SBP2_SCSI_STATUS_GOOD)) { | |
1da177e4 LT |
2391 | SBP2_ERR("Bus reset in progress - retry command later"); |
2392 | return; | |
2393 | } | |
a237f35f | 2394 | |
1da177e4 LT |
2395 | /* |
2396 | * Switch on scsi status | |
2397 | */ | |
2398 | switch (scsi_status) { | |
a237f35f SR |
2399 | case SBP2_SCSI_STATUS_GOOD: |
2400 | SCpnt->result = DID_OK; | |
2401 | break; | |
1da177e4 | 2402 | |
a237f35f SR |
2403 | case SBP2_SCSI_STATUS_BUSY: |
2404 | SBP2_ERR("SBP2_SCSI_STATUS_BUSY"); | |
2405 | SCpnt->result = DID_BUS_BUSY << 16; | |
2406 | break; | |
1da177e4 | 2407 | |
a237f35f SR |
2408 | case SBP2_SCSI_STATUS_CHECK_CONDITION: |
2409 | SBP2_DEBUG("SBP2_SCSI_STATUS_CHECK_CONDITION"); | |
2410 | SCpnt->result = CHECK_CONDITION << 1; | |
1da177e4 | 2411 | |
a237f35f SR |
2412 | /* |
2413 | * Debug stuff | |
2414 | */ | |
1da177e4 | 2415 | #if CONFIG_IEEE1394_SBP2_DEBUG >= 1 |
a237f35f SR |
2416 | scsi_print_command(SCpnt); |
2417 | scsi_print_sense("bh", SCpnt); | |
1da177e4 LT |
2418 | #endif |
2419 | ||
a237f35f | 2420 | break; |
1da177e4 | 2421 | |
a237f35f SR |
2422 | case SBP2_SCSI_STATUS_SELECTION_TIMEOUT: |
2423 | SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT"); | |
2424 | SCpnt->result = DID_NO_CONNECT << 16; | |
2425 | scsi_print_command(SCpnt); | |
2426 | break; | |
1da177e4 | 2427 | |
a237f35f SR |
2428 | case SBP2_SCSI_STATUS_CONDITION_MET: |
2429 | case SBP2_SCSI_STATUS_RESERVATION_CONFLICT: | |
2430 | case SBP2_SCSI_STATUS_COMMAND_TERMINATED: | |
2431 | SBP2_ERR("Bad SCSI status = %x", scsi_status); | |
2432 | SCpnt->result = DID_ERROR << 16; | |
2433 | scsi_print_command(SCpnt); | |
2434 | break; | |
1da177e4 | 2435 | |
a237f35f SR |
2436 | default: |
2437 | SBP2_ERR("Unsupported SCSI status = %x", scsi_status); | |
2438 | SCpnt->result = DID_ERROR << 16; | |
1da177e4 LT |
2439 | } |
2440 | ||
2441 | /* | |
2442 | * Take care of any sbp2 response data mucking here (RBC stuff, etc.) | |
2443 | */ | |
2444 | if (SCpnt->result == DID_OK) { | |
2445 | sbp2_check_sbp2_response(scsi_id, SCpnt); | |
2446 | } | |
2447 | ||
2448 | /* | |
2449 | * If a bus reset is in progress and there was an error, complete | |
2450 | * the command as busy so that it will get retried. | |
2451 | */ | |
a237f35f SR |
2452 | if (!hpsb_node_entry_valid(scsi_id->ne) |
2453 | && (scsi_status != SBP2_SCSI_STATUS_GOOD)) { | |
1da177e4 LT |
2454 | SBP2_ERR("Completing command with busy (bus reset)"); |
2455 | SCpnt->result = DID_BUS_BUSY << 16; | |
2456 | } | |
2457 | ||
2458 | /* | |
2459 | * If a unit attention occurs, return busy status so it gets | |
2460 | * retried... it could have happened because of a 1394 bus reset | |
2461 | * or hot-plug... | |
2462 | */ | |
2463 | #if 0 | |
2464 | if ((scsi_status == SBP2_SCSI_STATUS_CHECK_CONDITION) && | |
2465 | (SCpnt->sense_buffer[2] == UNIT_ATTENTION)) { | |
2466 | SBP2_DEBUG("UNIT ATTENTION - return busy"); | |
2467 | SCpnt->result = DID_BUS_BUSY << 16; | |
2468 | } | |
2469 | #endif | |
2470 | ||
2471 | /* | |
2472 | * Tell scsi stack that we're done with this command | |
2473 | */ | |
a237f35f | 2474 | done(SCpnt); |
1da177e4 LT |
2475 | } |
2476 | ||
abd559b1 | 2477 | static int sbp2scsi_slave_alloc(struct scsi_device *sdev) |
1da177e4 | 2478 | { |
a80614d1 SR |
2479 | struct scsi_id_instance_data *scsi_id = |
2480 | (struct scsi_id_instance_data *)sdev->host->hostdata[0]; | |
2481 | ||
2482 | scsi_id->sdev = sdev; | |
2483 | ||
2484 | if (force_inquiry_hack || | |
2485 | scsi_id->workarounds & SBP2_BREAKAGE_INQUIRY_HACK) { | |
2486 | sdev->inquiry_len = 36; | |
2487 | sdev->skip_ms_page_8 = 1; | |
2488 | } | |
abd559b1 JM |
2489 | return 0; |
2490 | } | |
2491 | ||
abd559b1 JM |
2492 | static int sbp2scsi_slave_configure(struct scsi_device *sdev) |
2493 | { | |
2494 | blk_queue_dma_alignment(sdev->request_queue, (512 - 1)); | |
365c786f BC |
2495 | sdev->use_10_for_rw = 1; |
2496 | sdev->use_10_for_ms = 1; | |
1da177e4 LT |
2497 | return 0; |
2498 | } | |
2499 | ||
abd559b1 JM |
2500 | static void sbp2scsi_slave_destroy(struct scsi_device *sdev) |
2501 | { | |
2502 | ((struct scsi_id_instance_data *)sdev->host->hostdata[0])->sdev = NULL; | |
2503 | return; | |
2504 | } | |
2505 | ||
1da177e4 LT |
2506 | /* |
2507 | * Called by scsi stack when something has really gone wrong. Usually | |
2508 | * called when a command has timed-out for some reason. | |
2509 | */ | |
2510 | static int sbp2scsi_abort(struct scsi_cmnd *SCpnt) | |
2511 | { | |
2512 | struct scsi_id_instance_data *scsi_id = | |
2513 | (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; | |
2514 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
2515 | struct sbp2_command_info *command; | |
2516 | ||
2517 | SBP2_ERR("aborting sbp2 command"); | |
2518 | scsi_print_command(SCpnt); | |
2519 | ||
abd559b1 | 2520 | if (sbp2util_node_is_available(scsi_id)) { |
1da177e4 LT |
2521 | |
2522 | /* | |
2523 | * Right now, just return any matching command structures | |
2524 | * to the free pool. | |
2525 | */ | |
2526 | command = sbp2util_find_command_for_SCpnt(scsi_id, SCpnt); | |
2527 | if (command) { | |
2528 | SBP2_DEBUG("Found command to abort"); | |
2529 | pci_dma_sync_single_for_cpu(hi->host->pdev, | |
2530 | command->command_orb_dma, | |
2531 | sizeof(struct sbp2_command_orb), | |
2532 | PCI_DMA_BIDIRECTIONAL); | |
2533 | pci_dma_sync_single_for_cpu(hi->host->pdev, | |
2534 | command->sge_dma, | |
2535 | sizeof(command->scatter_gather_element), | |
2536 | PCI_DMA_BIDIRECTIONAL); | |
2537 | sbp2util_mark_command_completed(scsi_id, command); | |
2538 | if (command->Current_SCpnt) { | |
2539 | command->Current_SCpnt->result = DID_ABORT << 16; | |
2540 | command->Current_done(command->Current_SCpnt); | |
2541 | } | |
2542 | } | |
2543 | ||
2544 | /* | |
2545 | * Initiate a fetch agent reset. | |
2546 | */ | |
2547 | sbp2_agent_reset(scsi_id, 0); | |
2548 | sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY); | |
2549 | } | |
2550 | ||
a237f35f | 2551 | return SUCCESS; |
1da177e4 LT |
2552 | } |
2553 | ||
2554 | /* | |
2555 | * Called by scsi stack when something has really gone wrong. | |
2556 | */ | |
abd559b1 | 2557 | static int sbp2scsi_reset(struct scsi_cmnd *SCpnt) |
1da177e4 LT |
2558 | { |
2559 | struct scsi_id_instance_data *scsi_id = | |
2560 | (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; | |
2561 | ||
2562 | SBP2_ERR("reset requested"); | |
2563 | ||
abd559b1 | 2564 | if (sbp2util_node_is_available(scsi_id)) { |
1da177e4 LT |
2565 | SBP2_ERR("Generating sbp2 fetch agent reset"); |
2566 | sbp2_agent_reset(scsi_id, 0); | |
2567 | } | |
2568 | ||
abd559b1 | 2569 | return SUCCESS; |
94d0e7b8 JG |
2570 | } |
2571 | ||
a237f35f SR |
2572 | static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev, |
2573 | struct device_attribute *attr, | |
2574 | char *buf) | |
1da177e4 LT |
2575 | { |
2576 | struct scsi_device *sdev; | |
2577 | struct scsi_id_instance_data *scsi_id; | |
2578 | int lun; | |
2579 | ||
2580 | if (!(sdev = to_scsi_device(dev))) | |
2581 | return 0; | |
2582 | ||
2583 | if (!(scsi_id = (struct scsi_id_instance_data *)sdev->host->hostdata[0])) | |
2584 | return 0; | |
2585 | ||
e309fc6d | 2586 | lun = ORB_SET_LUN(scsi_id->sbp2_lun); |
1da177e4 LT |
2587 | |
2588 | return sprintf(buf, "%016Lx:%d:%d\n", (unsigned long long)scsi_id->ne->guid, | |
2589 | scsi_id->ud->id, lun); | |
2590 | } | |
2591 | static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); | |
2592 | ||
2593 | static struct device_attribute *sbp2_sysfs_sdev_attrs[] = { | |
2594 | &dev_attr_ieee1394_id, | |
2595 | NULL | |
2596 | }; | |
2597 | ||
2598 | MODULE_AUTHOR("Ben Collins <bcollins@debian.org>"); | |
2599 | MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver"); | |
2600 | MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME); | |
2601 | MODULE_LICENSE("GPL"); | |
2602 | ||
2603 | /* SCSI host template */ | |
2604 | static struct scsi_host_template scsi_driver_template = { | |
2605 | .module = THIS_MODULE, | |
2606 | .name = "SBP-2 IEEE-1394", | |
2607 | .proc_name = SBP2_DEVICE_NAME, | |
1da177e4 LT |
2608 | .queuecommand = sbp2scsi_queuecommand, |
2609 | .eh_abort_handler = sbp2scsi_abort, | |
2610 | .eh_device_reset_handler = sbp2scsi_reset, | |
abd559b1 | 2611 | .slave_alloc = sbp2scsi_slave_alloc, |
1da177e4 | 2612 | .slave_configure = sbp2scsi_slave_configure, |
abd559b1 | 2613 | .slave_destroy = sbp2scsi_slave_destroy, |
1da177e4 LT |
2614 | .this_id = -1, |
2615 | .sg_tablesize = SG_ALL, | |
2616 | .use_clustering = ENABLE_CLUSTERING, | |
2617 | .cmd_per_lun = SBP2_MAX_CMDS, | |
2618 | .can_queue = SBP2_MAX_CMDS, | |
2619 | .emulated = 1, | |
2620 | .sdev_attrs = sbp2_sysfs_sdev_attrs, | |
2621 | }; | |
2622 | ||
2623 | static int sbp2_module_init(void) | |
2624 | { | |
2625 | int ret; | |
2626 | ||
2627 | SBP2_DEBUG("sbp2_module_init"); | |
2628 | ||
1da177e4 LT |
2629 | /* Module load debug option to force one command at a time (serializing I/O) */ |
2630 | if (serialize_io) { | |
2bab359a JM |
2631 | SBP2_INFO("Driver forced to serialize I/O (serialize_io=1)"); |
2632 | SBP2_INFO("Try serialize_io=0 for better performance"); | |
1da177e4 LT |
2633 | scsi_driver_template.can_queue = 1; |
2634 | scsi_driver_template.cmd_per_lun = 1; | |
2635 | } | |
2636 | ||
2637 | /* Set max sectors (module load option). Default is 255 sectors. */ | |
2638 | scsi_driver_template.max_sectors = max_sectors; | |
2639 | ||
1da177e4 LT |
2640 | /* Register our high level driver with 1394 stack */ |
2641 | hpsb_register_highlevel(&sbp2_highlevel); | |
2642 | ||
2643 | ret = hpsb_register_protocol(&sbp2_driver); | |
2644 | if (ret) { | |
2645 | SBP2_ERR("Failed to register protocol"); | |
2646 | hpsb_unregister_highlevel(&sbp2_highlevel); | |
2647 | return ret; | |
2648 | } | |
2649 | ||
2650 | return 0; | |
2651 | } | |
2652 | ||
2653 | static void __exit sbp2_module_exit(void) | |
2654 | { | |
2655 | SBP2_DEBUG("sbp2_module_exit"); | |
2656 | ||
2657 | hpsb_unregister_protocol(&sbp2_driver); | |
2658 | ||
2659 | hpsb_unregister_highlevel(&sbp2_highlevel); | |
2660 | } | |
2661 | ||
2662 | module_init(sbp2_module_init); | |
2663 | module_exit(sbp2_module_exit); |