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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> | |
24d3bf88 | 45 | #include <linux/stringify.h> |
1da177e4 LT |
46 | #include <linux/slab.h> |
47 | #include <linux/interrupt.h> | |
48 | #include <linux/fs.h> | |
49 | #include <linux/poll.h> | |
50 | #include <linux/module.h> | |
51 | #include <linux/moduleparam.h> | |
52 | #include <linux/types.h> | |
53 | #include <linux/delay.h> | |
54 | #include <linux/sched.h> | |
55 | #include <linux/blkdev.h> | |
56 | #include <linux/smp_lock.h> | |
57 | #include <linux/init.h> | |
58 | #include <linux/pci.h> | |
59 | ||
60 | #include <asm/current.h> | |
61 | #include <asm/uaccess.h> | |
62 | #include <asm/io.h> | |
63 | #include <asm/byteorder.h> | |
64 | #include <asm/atomic.h> | |
65 | #include <asm/system.h> | |
66 | #include <asm/scatterlist.h> | |
67 | ||
68 | #include <scsi/scsi.h> | |
69 | #include <scsi/scsi_cmnd.h> | |
70 | #include <scsi/scsi_dbg.h> | |
71 | #include <scsi/scsi_device.h> | |
72 | #include <scsi/scsi_host.h> | |
73 | ||
74 | #include "csr1212.h" | |
75 | #include "ieee1394.h" | |
76 | #include "ieee1394_types.h" | |
77 | #include "ieee1394_core.h" | |
78 | #include "nodemgr.h" | |
79 | #include "hosts.h" | |
80 | #include "highlevel.h" | |
81 | #include "ieee1394_transactions.h" | |
82 | #include "sbp2.h" | |
83 | ||
1da177e4 LT |
84 | /* |
85 | * Module load parameter definitions | |
86 | */ | |
87 | ||
88 | /* | |
89 | * Change max_speed on module load if you have a bad IEEE-1394 | |
90 | * controller that has trouble running 2KB packets at 400mb. | |
91 | * | |
92 | * NOTE: On certain OHCI parts I have seen short packets on async transmit | |
93 | * (probably due to PCI latency/throughput issues with the part). You can | |
94 | * bump down the speed if you are running into problems. | |
95 | */ | |
96 | static int max_speed = IEEE1394_SPEED_MAX; | |
97 | module_param(max_speed, int, 0644); | |
2bab359a | 98 | MODULE_PARM_DESC(max_speed, "Force max speed (3 = 800mb, 2 = 400mb, 1 = 200mb, 0 = 100mb)"); |
1da177e4 LT |
99 | |
100 | /* | |
101 | * Set serialize_io to 1 if you'd like only one scsi command sent | |
102 | * down to us at a time (debugging). This might be necessary for very | |
103 | * badly behaved sbp2 devices. | |
2bab359a JM |
104 | * |
105 | * TODO: Make this configurable per device. | |
1da177e4 | 106 | */ |
2bab359a | 107 | static int serialize_io = 1; |
1da177e4 | 108 | module_param(serialize_io, int, 0444); |
2bab359a | 109 | MODULE_PARM_DESC(serialize_io, "Serialize I/O coming from scsi drivers (default = 1, faster = 0)"); |
1da177e4 LT |
110 | |
111 | /* | |
112 | * Bump up max_sectors if you'd like to support very large sized | |
113 | * transfers. Please note that some older sbp2 bridge chips are broken for | |
114 | * transfers greater or equal to 128KB. Default is a value of 255 | |
115 | * sectors, or just under 128KB (at 512 byte sector size). I can note that | |
116 | * the Oxsemi sbp2 chipsets have no problems supporting very large | |
117 | * transfer sizes. | |
118 | */ | |
119 | static int max_sectors = SBP2_MAX_SECTORS; | |
120 | module_param(max_sectors, int, 0444); | |
24d3bf88 SR |
121 | MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported (default = " |
122 | __stringify(SBP2_MAX_SECTORS) ")"); | |
1da177e4 LT |
123 | |
124 | /* | |
125 | * Exclusive login to sbp2 device? In most cases, the sbp2 driver should | |
126 | * do an exclusive login, as it's generally unsafe to have two hosts | |
127 | * talking to a single sbp2 device at the same time (filesystem coherency, | |
128 | * etc.). If you're running an sbp2 device that supports multiple logins, | |
129 | * and you're either running read-only filesystems or some sort of special | |
130 | * filesystem supporting multiple hosts (one such filesystem is OpenGFS, | |
131 | * see opengfs.sourceforge.net for more info), then set exclusive_login | |
132 | * to zero. Note: The Oxsemi OXFW911 sbp2 chipset supports up to four | |
133 | * concurrent logins. | |
134 | */ | |
135 | static int exclusive_login = 1; | |
136 | module_param(exclusive_login, int, 0644); | |
137 | MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device (default = 1)"); | |
138 | ||
139 | /* | |
24d3bf88 SR |
140 | * If any of the following workarounds is required for your device to work, |
141 | * please submit the kernel messages logged by sbp2 to the linux1394-devel | |
142 | * mailing list. | |
1da177e4 | 143 | * |
24d3bf88 SR |
144 | * - 128kB max transfer |
145 | * Limit transfer size. Necessary for some old bridges. | |
146 | * | |
147 | * - 36 byte inquiry | |
148 | * When scsi_mod probes the device, let the inquiry command look like that | |
149 | * from MS Windows. | |
150 | * | |
151 | * - skip mode page 8 | |
152 | * Suppress sending of mode_sense for mode page 8 if the device pretends to | |
153 | * support the SCSI Primary Block commands instead of Reduced Block Commands. | |
1da177e4 | 154 | */ |
24d3bf88 SR |
155 | static int sbp2_default_workarounds; |
156 | module_param_named(workarounds, sbp2_default_workarounds, int, 0644); | |
157 | MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0" | |
158 | ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS) | |
159 | ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36) | |
160 | ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8) | |
161 | ", or a combination)"); | |
162 | ||
163 | /* legacy parameter */ | |
1934b8b6 | 164 | static int force_inquiry_hack; |
a80614d1 | 165 | module_param(force_inquiry_hack, int, 0644); |
24d3bf88 | 166 | MODULE_PARM_DESC(force_inquiry_hack, "Deprecated, use 'workarounds'"); |
1da177e4 | 167 | |
1da177e4 LT |
168 | /* |
169 | * Export information about protocols/devices supported by this driver. | |
170 | */ | |
171 | static struct ieee1394_device_id sbp2_id_table[] = { | |
172 | { | |
a237f35f SR |
173 | .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION, |
174 | .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff, | |
175 | .version = SBP2_SW_VERSION_ENTRY & 0xffffff}, | |
176 | {} | |
1da177e4 LT |
177 | }; |
178 | ||
179 | MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); | |
180 | ||
181 | /* | |
182 | * Debug levels, configured via kernel config, or enable here. | |
183 | */ | |
184 | ||
44456d37 | 185 | #define CONFIG_IEEE1394_SBP2_DEBUG 0 |
1da177e4 LT |
186 | /* #define CONFIG_IEEE1394_SBP2_DEBUG_ORBS */ |
187 | /* #define CONFIG_IEEE1394_SBP2_DEBUG_DMA */ | |
188 | /* #define CONFIG_IEEE1394_SBP2_DEBUG 1 */ | |
189 | /* #define CONFIG_IEEE1394_SBP2_DEBUG 2 */ | |
190 | /* #define CONFIG_IEEE1394_SBP2_PACKET_DUMP */ | |
191 | ||
192 | #ifdef CONFIG_IEEE1394_SBP2_DEBUG_ORBS | |
193 | #define SBP2_ORB_DEBUG(fmt, args...) HPSB_ERR("sbp2(%s): "fmt, __FUNCTION__, ## args) | |
194 | static u32 global_outstanding_command_orbs = 0; | |
195 | #define outstanding_orb_incr global_outstanding_command_orbs++ | |
196 | #define outstanding_orb_decr global_outstanding_command_orbs-- | |
197 | #else | |
198 | #define SBP2_ORB_DEBUG(fmt, args...) | |
199 | #define outstanding_orb_incr | |
200 | #define outstanding_orb_decr | |
201 | #endif | |
202 | ||
203 | #ifdef CONFIG_IEEE1394_SBP2_DEBUG_DMA | |
204 | #define SBP2_DMA_ALLOC(fmt, args...) \ | |
205 | HPSB_ERR("sbp2(%s)alloc(%d): "fmt, __FUNCTION__, \ | |
206 | ++global_outstanding_dmas, ## args) | |
207 | #define SBP2_DMA_FREE(fmt, args...) \ | |
208 | HPSB_ERR("sbp2(%s)free(%d): "fmt, __FUNCTION__, \ | |
209 | --global_outstanding_dmas, ## args) | |
210 | static u32 global_outstanding_dmas = 0; | |
211 | #else | |
212 | #define SBP2_DMA_ALLOC(fmt, args...) | |
213 | #define SBP2_DMA_FREE(fmt, args...) | |
214 | #endif | |
215 | ||
216 | #if CONFIG_IEEE1394_SBP2_DEBUG >= 2 | |
217 | #define SBP2_DEBUG(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
218 | #define SBP2_INFO(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
219 | #define SBP2_NOTICE(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
220 | #define SBP2_WARN(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
221 | #elif CONFIG_IEEE1394_SBP2_DEBUG == 1 | |
222 | #define SBP2_DEBUG(fmt, args...) HPSB_DEBUG("sbp2: "fmt, ## args) | |
223 | #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args) | |
224 | #define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args) | |
225 | #define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args) | |
226 | #else | |
227 | #define SBP2_DEBUG(fmt, args...) | |
228 | #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args) | |
229 | #define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args) | |
230 | #define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args) | |
231 | #endif | |
232 | ||
233 | #define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
d024ebc6 | 234 | #define SBP2_DEBUG_ENTER() SBP2_DEBUG("%s", __FUNCTION__) |
1da177e4 | 235 | |
1da177e4 LT |
236 | /* |
237 | * Globals | |
238 | */ | |
239 | ||
240 | static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id, | |
241 | u32 status); | |
242 | ||
243 | static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id, | |
244 | u32 scsi_status, struct scsi_cmnd *SCpnt, | |
245 | void (*done)(struct scsi_cmnd *)); | |
246 | ||
247 | static struct scsi_host_template scsi_driver_template; | |
248 | ||
249 | static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC }; | |
250 | ||
251 | static void sbp2_host_reset(struct hpsb_host *host); | |
252 | ||
253 | static int sbp2_probe(struct device *dev); | |
254 | static int sbp2_remove(struct device *dev); | |
255 | static int sbp2_update(struct unit_directory *ud); | |
256 | ||
257 | static struct hpsb_highlevel sbp2_highlevel = { | |
258 | .name = SBP2_DEVICE_NAME, | |
259 | .host_reset = sbp2_host_reset, | |
260 | }; | |
261 | ||
262 | static struct hpsb_address_ops sbp2_ops = { | |
263 | .write = sbp2_handle_status_write | |
264 | }; | |
265 | ||
266 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA | |
267 | static struct hpsb_address_ops sbp2_physdma_ops = { | |
a237f35f SR |
268 | .read = sbp2_handle_physdma_read, |
269 | .write = sbp2_handle_physdma_write, | |
1da177e4 LT |
270 | }; |
271 | #endif | |
272 | ||
273 | static struct hpsb_protocol_driver sbp2_driver = { | |
274 | .name = "SBP2 Driver", | |
275 | .id_table = sbp2_id_table, | |
276 | .update = sbp2_update, | |
277 | .driver = { | |
278 | .name = SBP2_DEVICE_NAME, | |
279 | .bus = &ieee1394_bus_type, | |
280 | .probe = sbp2_probe, | |
281 | .remove = sbp2_remove, | |
282 | }, | |
283 | }; | |
284 | ||
a80614d1 | 285 | /* |
24d3bf88 SR |
286 | * List of devices with known bugs. |
287 | * | |
288 | * The firmware_revision field, masked with 0xffff00, is the best indicator | |
289 | * for the type of bridge chip of a device. It yields a few false positives | |
290 | * but this did not break correctly behaving devices so far. | |
a80614d1 | 291 | */ |
24d3bf88 SR |
292 | static const struct { |
293 | u32 firmware_revision; | |
294 | unsigned workarounds; | |
295 | } sbp2_workarounds_table[] = { | |
296 | /* TSB42AA9 */ { | |
297 | .firmware_revision = 0x002800, | |
298 | .workarounds = SBP2_WORKAROUND_INQUIRY_36 | | |
299 | SBP2_WORKAROUND_MODE_SENSE_8, | |
300 | }, | |
301 | /* Initio bridges, actually only needed for some older ones */ { | |
302 | .firmware_revision = 0x000200, | |
303 | .workarounds = SBP2_WORKAROUND_INQUIRY_36, | |
304 | }, | |
305 | /* Symbios bridge */ { | |
306 | .firmware_revision = 0xa0b800, | |
307 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, | |
308 | } | |
1da177e4 LT |
309 | }; |
310 | ||
1da177e4 LT |
311 | /************************************** |
312 | * General utility functions | |
313 | **************************************/ | |
314 | ||
1da177e4 LT |
315 | #ifndef __BIG_ENDIAN |
316 | /* | |
317 | * Converts a buffer from be32 to cpu byte ordering. Length is in bytes. | |
318 | */ | |
319 | static __inline__ void sbp2util_be32_to_cpu_buffer(void *buffer, int length) | |
320 | { | |
321 | u32 *temp = buffer; | |
322 | ||
323 | for (length = (length >> 2); length--; ) | |
324 | temp[length] = be32_to_cpu(temp[length]); | |
325 | ||
326 | return; | |
327 | } | |
328 | ||
329 | /* | |
330 | * Converts a buffer from cpu to be32 byte ordering. Length is in bytes. | |
331 | */ | |
332 | static __inline__ void sbp2util_cpu_to_be32_buffer(void *buffer, int length) | |
333 | { | |
334 | u32 *temp = buffer; | |
335 | ||
336 | for (length = (length >> 2); length--; ) | |
337 | temp[length] = cpu_to_be32(temp[length]); | |
338 | ||
339 | return; | |
340 | } | |
341 | #else /* BIG_ENDIAN */ | |
342 | /* Why waste the cpu cycles? */ | |
343 | #define sbp2util_be32_to_cpu_buffer(x,y) | |
344 | #define sbp2util_cpu_to_be32_buffer(x,y) | |
345 | #endif | |
346 | ||
347 | #ifdef CONFIG_IEEE1394_SBP2_PACKET_DUMP | |
348 | /* | |
349 | * Debug packet dump routine. Length is in bytes. | |
350 | */ | |
a237f35f SR |
351 | static void sbp2util_packet_dump(void *buffer, int length, char *dump_name, |
352 | u32 dump_phys_addr) | |
1da177e4 LT |
353 | { |
354 | int i; | |
355 | unsigned char *dump = buffer; | |
356 | ||
357 | if (!dump || !length || !dump_name) | |
358 | return; | |
359 | ||
360 | if (dump_phys_addr) | |
361 | printk("[%s, 0x%x]", dump_name, dump_phys_addr); | |
362 | else | |
363 | printk("[%s]", dump_name); | |
364 | for (i = 0; i < length; i++) { | |
365 | if (i > 0x3f) { | |
366 | printk("\n ..."); | |
367 | break; | |
368 | } | |
369 | if ((i & 0x3) == 0) | |
370 | printk(" "); | |
371 | if ((i & 0xf) == 0) | |
372 | printk("\n "); | |
a237f35f | 373 | printk("%02x ", (int)dump[i]); |
1da177e4 LT |
374 | } |
375 | printk("\n"); | |
376 | ||
377 | return; | |
378 | } | |
379 | #else | |
380 | #define sbp2util_packet_dump(w,x,y,z) | |
381 | #endif | |
382 | ||
383 | /* | |
384 | * Goofy routine that basically does a down_timeout function. | |
385 | */ | |
386 | static int sbp2util_down_timeout(atomic_t *done, int timeout) | |
387 | { | |
388 | int i; | |
389 | ||
390 | for (i = timeout; (i > 0 && atomic_read(done) == 0); i-= HZ/10) { | |
391 | if (msleep_interruptible(100)) /* 100ms */ | |
a237f35f | 392 | return 1; |
1da177e4 | 393 | } |
a237f35f | 394 | return (i > 0) ? 0 : 1; |
1da177e4 LT |
395 | } |
396 | ||
397 | /* Free's an allocated packet */ | |
398 | static void sbp2_free_packet(struct hpsb_packet *packet) | |
399 | { | |
400 | hpsb_free_tlabel(packet); | |
401 | hpsb_free_packet(packet); | |
402 | } | |
403 | ||
404 | /* This is much like hpsb_node_write(), except it ignores the response | |
405 | * subaction and returns immediately. Can be used from interrupts. | |
406 | */ | |
407 | static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr, | |
a237f35f | 408 | quadlet_t *buffer, size_t length) |
1da177e4 LT |
409 | { |
410 | struct hpsb_packet *packet; | |
411 | ||
412 | packet = hpsb_make_writepacket(ne->host, ne->nodeid, | |
413 | addr, buffer, length); | |
a237f35f SR |
414 | if (!packet) |
415 | return -ENOMEM; | |
1da177e4 | 416 | |
a237f35f SR |
417 | hpsb_set_packet_complete_task(packet, |
418 | (void (*)(void *))sbp2_free_packet, | |
1da177e4 LT |
419 | packet); |
420 | ||
421 | hpsb_node_fill_packet(ne, packet); | |
422 | ||
a237f35f | 423 | if (hpsb_send_packet(packet) < 0) { |
1da177e4 LT |
424 | sbp2_free_packet(packet); |
425 | return -EIO; | |
426 | } | |
427 | ||
428 | return 0; | |
429 | } | |
430 | ||
431 | /* | |
432 | * This function is called to create a pool of command orbs used for | |
433 | * command processing. It is called when a new sbp2 device is detected. | |
434 | */ | |
435 | static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data *scsi_id) | |
436 | { | |
437 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
438 | int i; | |
439 | unsigned long flags, orbs; | |
440 | struct sbp2_command_info *command; | |
441 | ||
442 | orbs = serialize_io ? 2 : SBP2_MAX_CMDS; | |
443 | ||
444 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
445 | for (i = 0; i < orbs; i++) { | |
8551158a | 446 | command = kzalloc(sizeof(*command), GFP_ATOMIC); |
1da177e4 | 447 | if (!command) { |
a237f35f SR |
448 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, |
449 | flags); | |
450 | return -ENOMEM; | |
1da177e4 | 451 | } |
1da177e4 | 452 | command->command_orb_dma = |
a237f35f SR |
453 | pci_map_single(hi->host->pdev, &command->command_orb, |
454 | sizeof(struct sbp2_command_orb), | |
455 | PCI_DMA_BIDIRECTIONAL); | |
1da177e4 LT |
456 | SBP2_DMA_ALLOC("single command orb DMA"); |
457 | command->sge_dma = | |
a237f35f SR |
458 | pci_map_single(hi->host->pdev, |
459 | &command->scatter_gather_element, | |
460 | sizeof(command->scatter_gather_element), | |
461 | PCI_DMA_BIDIRECTIONAL); | |
1da177e4 LT |
462 | SBP2_DMA_ALLOC("scatter_gather_element"); |
463 | INIT_LIST_HEAD(&command->list); | |
464 | list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed); | |
465 | } | |
466 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
467 | return 0; | |
468 | } | |
469 | ||
470 | /* | |
471 | * This function is called to delete a pool of command orbs. | |
472 | */ | |
473 | static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data *scsi_id) | |
474 | { | |
475 | struct hpsb_host *host = scsi_id->hi->host; | |
476 | struct list_head *lh, *next; | |
477 | struct sbp2_command_info *command; | |
478 | unsigned long flags; | |
479 | ||
480 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
481 | if (!list_empty(&scsi_id->sbp2_command_orb_completed)) { | |
482 | list_for_each_safe(lh, next, &scsi_id->sbp2_command_orb_completed) { | |
483 | command = list_entry(lh, struct sbp2_command_info, list); | |
484 | ||
485 | /* Release our generic DMA's */ | |
486 | pci_unmap_single(host->pdev, command->command_orb_dma, | |
487 | sizeof(struct sbp2_command_orb), | |
488 | PCI_DMA_BIDIRECTIONAL); | |
489 | SBP2_DMA_FREE("single command orb DMA"); | |
490 | pci_unmap_single(host->pdev, command->sge_dma, | |
491 | sizeof(command->scatter_gather_element), | |
492 | PCI_DMA_BIDIRECTIONAL); | |
493 | SBP2_DMA_FREE("scatter_gather_element"); | |
494 | ||
495 | kfree(command); | |
496 | } | |
497 | } | |
498 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
499 | return; | |
500 | } | |
501 | ||
502 | /* | |
503 | * This function finds the sbp2_command for a given outstanding command | |
504 | * orb.Only looks at the inuse list. | |
505 | */ | |
506 | static struct sbp2_command_info *sbp2util_find_command_for_orb( | |
507 | struct scsi_id_instance_data *scsi_id, dma_addr_t orb) | |
508 | { | |
509 | struct sbp2_command_info *command; | |
510 | unsigned long flags; | |
511 | ||
512 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
513 | if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) { | |
514 | list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) { | |
515 | if (command->command_orb_dma == orb) { | |
516 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
a237f35f | 517 | return command; |
1da177e4 LT |
518 | } |
519 | } | |
520 | } | |
521 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
522 | ||
523 | SBP2_ORB_DEBUG("could not match command orb %x", (unsigned int)orb); | |
524 | ||
a237f35f | 525 | return NULL; |
1da177e4 LT |
526 | } |
527 | ||
528 | /* | |
529 | * This function finds the sbp2_command for a given outstanding SCpnt. | |
530 | * Only looks at the inuse list. | |
24c7cd06 | 531 | * Must be called with scsi_id->sbp2_command_orb_lock held. |
1da177e4 | 532 | */ |
24c7cd06 SR |
533 | static struct sbp2_command_info *sbp2util_find_command_for_SCpnt( |
534 | struct scsi_id_instance_data *scsi_id, void *SCpnt) | |
1da177e4 LT |
535 | { |
536 | struct sbp2_command_info *command; | |
1da177e4 | 537 | |
24c7cd06 SR |
538 | if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) |
539 | list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) | |
540 | if (command->Current_SCpnt == SCpnt) | |
a237f35f | 541 | return command; |
a237f35f | 542 | return NULL; |
1da177e4 LT |
543 | } |
544 | ||
545 | /* | |
546 | * This function allocates a command orb used to send a scsi command. | |
547 | */ | |
548 | static struct sbp2_command_info *sbp2util_allocate_command_orb( | |
549 | struct scsi_id_instance_data *scsi_id, | |
550 | struct scsi_cmnd *Current_SCpnt, | |
551 | void (*Current_done)(struct scsi_cmnd *)) | |
552 | { | |
553 | struct list_head *lh; | |
554 | struct sbp2_command_info *command = NULL; | |
555 | unsigned long flags; | |
556 | ||
557 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
558 | if (!list_empty(&scsi_id->sbp2_command_orb_completed)) { | |
559 | lh = scsi_id->sbp2_command_orb_completed.next; | |
560 | list_del(lh); | |
561 | command = list_entry(lh, struct sbp2_command_info, list); | |
562 | command->Current_done = Current_done; | |
563 | command->Current_SCpnt = Current_SCpnt; | |
564 | list_add_tail(&command->list, &scsi_id->sbp2_command_orb_inuse); | |
565 | } else { | |
d024ebc6 | 566 | SBP2_ERR("%s: no orbs available", __FUNCTION__); |
1da177e4 LT |
567 | } |
568 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
a237f35f | 569 | return command; |
1da177e4 LT |
570 | } |
571 | ||
572 | /* Free our DMA's */ | |
573 | static void sbp2util_free_command_dma(struct sbp2_command_info *command) | |
574 | { | |
575 | struct scsi_id_instance_data *scsi_id = | |
576 | (struct scsi_id_instance_data *)command->Current_SCpnt->device->host->hostdata[0]; | |
577 | struct hpsb_host *host; | |
578 | ||
579 | if (!scsi_id) { | |
d024ebc6 | 580 | SBP2_ERR("%s: scsi_id == NULL", __FUNCTION__); |
1da177e4 LT |
581 | return; |
582 | } | |
583 | ||
584 | host = scsi_id->ud->ne->host; | |
585 | ||
586 | if (command->cmd_dma) { | |
587 | if (command->dma_type == CMD_DMA_SINGLE) { | |
588 | pci_unmap_single(host->pdev, command->cmd_dma, | |
589 | command->dma_size, command->dma_dir); | |
590 | SBP2_DMA_FREE("single bulk"); | |
591 | } else if (command->dma_type == CMD_DMA_PAGE) { | |
592 | pci_unmap_page(host->pdev, command->cmd_dma, | |
593 | command->dma_size, command->dma_dir); | |
594 | SBP2_DMA_FREE("single page"); | |
595 | } /* XXX: Check for CMD_DMA_NONE bug */ | |
596 | command->dma_type = CMD_DMA_NONE; | |
597 | command->cmd_dma = 0; | |
598 | } | |
599 | ||
600 | if (command->sge_buffer) { | |
601 | pci_unmap_sg(host->pdev, command->sge_buffer, | |
602 | command->dma_size, command->dma_dir); | |
603 | SBP2_DMA_FREE("scatter list"); | |
604 | command->sge_buffer = NULL; | |
605 | } | |
606 | } | |
607 | ||
608 | /* | |
609 | * This function moves a command to the completed orb list. | |
24c7cd06 | 610 | * Must be called with scsi_id->sbp2_command_orb_lock held. |
1da177e4 | 611 | */ |
24c7cd06 SR |
612 | static void sbp2util_mark_command_completed( |
613 | struct scsi_id_instance_data *scsi_id, | |
614 | struct sbp2_command_info *command) | |
1da177e4 | 615 | { |
1da177e4 LT |
616 | list_del(&command->list); |
617 | sbp2util_free_command_dma(command); | |
618 | list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed); | |
1da177e4 LT |
619 | } |
620 | ||
abd559b1 JM |
621 | /* |
622 | * Is scsi_id valid? Is the 1394 node still present? | |
623 | */ | |
624 | static inline int sbp2util_node_is_available(struct scsi_id_instance_data *scsi_id) | |
625 | { | |
626 | return scsi_id && scsi_id->ne && !scsi_id->ne->in_limbo; | |
627 | } | |
628 | ||
1da177e4 LT |
629 | /********************************************* |
630 | * IEEE-1394 core driver stack related section | |
631 | *********************************************/ | |
632 | static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud); | |
633 | ||
634 | static int sbp2_probe(struct device *dev) | |
635 | { | |
636 | struct unit_directory *ud; | |
637 | struct scsi_id_instance_data *scsi_id; | |
638 | ||
d024ebc6 | 639 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
640 | |
641 | ud = container_of(dev, struct unit_directory, device); | |
642 | ||
643 | /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s) | |
644 | * instead. */ | |
645 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY) | |
646 | return -ENODEV; | |
647 | ||
a237f35f | 648 | scsi_id = sbp2_alloc_device(ud); |
1da177e4 | 649 | |
a237f35f SR |
650 | if (!scsi_id) |
651 | return -ENOMEM; | |
1da177e4 | 652 | |
a237f35f | 653 | sbp2_parse_unit_directory(scsi_id, ud); |
1da177e4 | 654 | |
a237f35f | 655 | return sbp2_start_device(scsi_id); |
1da177e4 LT |
656 | } |
657 | ||
658 | static int sbp2_remove(struct device *dev) | |
659 | { | |
660 | struct unit_directory *ud; | |
661 | struct scsi_id_instance_data *scsi_id; | |
abd559b1 | 662 | struct scsi_device *sdev; |
1da177e4 | 663 | |
d024ebc6 | 664 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
665 | |
666 | ud = container_of(dev, struct unit_directory, device); | |
667 | scsi_id = ud->device.driver_data; | |
abd559b1 JM |
668 | if (!scsi_id) |
669 | return 0; | |
670 | ||
bf637ec3 SR |
671 | if (scsi_id->scsi_host) { |
672 | /* Get rid of enqueued commands if there is no chance to | |
673 | * send them. */ | |
674 | if (!sbp2util_node_is_available(scsi_id)) | |
675 | sbp2scsi_complete_all_commands(scsi_id, DID_NO_CONNECT); | |
676 | /* scsi_remove_device() will trigger shutdown functions of SCSI | |
677 | * highlevel drivers which would deadlock if blocked. */ | |
abd559b1 | 678 | scsi_unblock_requests(scsi_id->scsi_host); |
bf637ec3 | 679 | } |
abd559b1 JM |
680 | sdev = scsi_id->sdev; |
681 | if (sdev) { | |
682 | scsi_id->sdev = NULL; | |
683 | scsi_remove_device(sdev); | |
684 | } | |
1da177e4 LT |
685 | |
686 | sbp2_logout_device(scsi_id); | |
687 | sbp2_remove_device(scsi_id); | |
688 | ||
689 | return 0; | |
690 | } | |
691 | ||
692 | static int sbp2_update(struct unit_directory *ud) | |
693 | { | |
694 | struct scsi_id_instance_data *scsi_id = ud->device.driver_data; | |
695 | ||
d024ebc6 | 696 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
697 | |
698 | if (sbp2_reconnect_device(scsi_id)) { | |
699 | ||
700 | /* | |
701 | * Ok, reconnect has failed. Perhaps we didn't | |
702 | * reconnect fast enough. Try doing a regular login, but | |
703 | * first do a logout just in case of any weirdness. | |
704 | */ | |
705 | sbp2_logout_device(scsi_id); | |
706 | ||
707 | if (sbp2_login_device(scsi_id)) { | |
708 | /* Login failed too, just fail, and the backend | |
709 | * will call our sbp2_remove for us */ | |
710 | SBP2_ERR("Failed to reconnect to sbp2 device!"); | |
711 | return -EBUSY; | |
712 | } | |
713 | } | |
714 | ||
715 | /* Set max retries to something large on the device. */ | |
716 | sbp2_set_busy_timeout(scsi_id); | |
717 | ||
718 | /* Do a SBP-2 fetch agent reset. */ | |
719 | sbp2_agent_reset(scsi_id, 1); | |
720 | ||
721 | /* Get the max speed and packet size that we can use. */ | |
722 | sbp2_max_speed_and_size(scsi_id); | |
723 | ||
724 | /* Complete any pending commands with busy (so they get | |
725 | * retried) and remove them from our queue | |
726 | */ | |
727 | sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY); | |
728 | ||
729 | /* Make sure we unblock requests (since this is likely after a bus | |
730 | * reset). */ | |
731 | scsi_unblock_requests(scsi_id->scsi_host); | |
732 | ||
733 | return 0; | |
734 | } | |
735 | ||
736 | /* This functions is called by the sbp2_probe, for each new device. We now | |
737 | * allocate one scsi host for each scsi_id (unit directory). */ | |
738 | static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud) | |
739 | { | |
740 | struct sbp2scsi_host_info *hi; | |
741 | struct Scsi_Host *scsi_host = NULL; | |
742 | struct scsi_id_instance_data *scsi_id = NULL; | |
743 | ||
d024ebc6 | 744 | SBP2_DEBUG_ENTER(); |
1da177e4 | 745 | |
8551158a | 746 | scsi_id = kzalloc(sizeof(*scsi_id), GFP_KERNEL); |
1da177e4 LT |
747 | if (!scsi_id) { |
748 | SBP2_ERR("failed to create scsi_id"); | |
749 | goto failed_alloc; | |
750 | } | |
1da177e4 LT |
751 | |
752 | scsi_id->ne = ud->ne; | |
753 | scsi_id->ud = ud; | |
754 | scsi_id->speed_code = IEEE1394_SPEED_100; | |
755 | scsi_id->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100]; | |
756 | atomic_set(&scsi_id->sbp2_login_complete, 0); | |
757 | INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_inuse); | |
758 | INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_completed); | |
759 | INIT_LIST_HEAD(&scsi_id->scsi_list); | |
760 | spin_lock_init(&scsi_id->sbp2_command_orb_lock); | |
e309fc6d | 761 | scsi_id->sbp2_lun = 0; |
1da177e4 LT |
762 | |
763 | ud->device.driver_data = scsi_id; | |
764 | ||
765 | hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host); | |
766 | if (!hi) { | |
767 | hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host, sizeof(*hi)); | |
768 | if (!hi) { | |
769 | SBP2_ERR("failed to allocate hostinfo"); | |
770 | goto failed_alloc; | |
771 | } | |
772 | SBP2_DEBUG("sbp2_alloc_device: allocated hostinfo"); | |
773 | hi->host = ud->ne->host; | |
774 | INIT_LIST_HEAD(&hi->scsi_ids); | |
775 | ||
1da177e4 LT |
776 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA |
777 | /* Handle data movement if physical dma is not | |
55664051 SR |
778 | * enabled or not supported on host controller */ |
779 | if (!hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, | |
780 | &sbp2_physdma_ops, | |
781 | 0x0ULL, 0xfffffffcULL)) { | |
782 | SBP2_ERR("failed to register lower 4GB address range"); | |
783 | goto failed_alloc; | |
784 | } | |
1da177e4 LT |
785 | #endif |
786 | } | |
787 | ||
147830f2 SR |
788 | /* Prevent unloading of the 1394 host */ |
789 | if (!try_module_get(hi->host->driver->owner)) { | |
790 | SBP2_ERR("failed to get a reference on 1394 host driver"); | |
791 | goto failed_alloc; | |
792 | } | |
793 | ||
1da177e4 LT |
794 | scsi_id->hi = hi; |
795 | ||
796 | list_add_tail(&scsi_id->scsi_list, &hi->scsi_ids); | |
797 | ||
35bdddb8 SR |
798 | /* Register the status FIFO address range. We could use the same FIFO |
799 | * for targets at different nodes. However we need different FIFOs per | |
800 | * target in order to support multi-unit devices. */ | |
801 | scsi_id->status_fifo_addr = hpsb_allocate_and_register_addrspace( | |
802 | &sbp2_highlevel, ud->ne->host, &sbp2_ops, | |
803 | sizeof(struct sbp2_status_block), sizeof(quadlet_t), | |
804 | ~0ULL, ~0ULL); | |
805 | if (!scsi_id->status_fifo_addr) { | |
806 | SBP2_ERR("failed to allocate status FIFO address range"); | |
807 | goto failed_alloc; | |
808 | } | |
809 | ||
1da177e4 | 810 | /* Register our host with the SCSI stack. */ |
a2ef79e1 | 811 | scsi_host = scsi_host_alloc(&scsi_driver_template, |
a237f35f | 812 | sizeof(unsigned long)); |
1da177e4 LT |
813 | if (!scsi_host) { |
814 | SBP2_ERR("failed to register scsi host"); | |
815 | goto failed_alloc; | |
816 | } | |
817 | ||
818 | scsi_host->hostdata[0] = (unsigned long)scsi_id; | |
819 | ||
820 | if (!scsi_add_host(scsi_host, &ud->device)) { | |
821 | scsi_id->scsi_host = scsi_host; | |
822 | return scsi_id; | |
823 | } | |
824 | ||
825 | SBP2_ERR("failed to add scsi host"); | |
826 | scsi_host_put(scsi_host); | |
827 | ||
828 | failed_alloc: | |
829 | sbp2_remove_device(scsi_id); | |
830 | return NULL; | |
831 | } | |
832 | ||
1da177e4 LT |
833 | static void sbp2_host_reset(struct hpsb_host *host) |
834 | { | |
835 | struct sbp2scsi_host_info *hi; | |
836 | struct scsi_id_instance_data *scsi_id; | |
837 | ||
838 | hi = hpsb_get_hostinfo(&sbp2_highlevel, host); | |
839 | ||
840 | if (hi) { | |
841 | list_for_each_entry(scsi_id, &hi->scsi_ids, scsi_list) | |
842 | scsi_block_requests(scsi_id->scsi_host); | |
843 | } | |
844 | } | |
845 | ||
1da177e4 LT |
846 | /* |
847 | * This function is where we first pull the node unique ids, and then | |
848 | * allocate memory and register a SBP-2 device. | |
849 | */ | |
850 | static int sbp2_start_device(struct scsi_id_instance_data *scsi_id) | |
851 | { | |
852 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
146f7262 | 853 | int error; |
1da177e4 | 854 | |
d024ebc6 | 855 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
856 | |
857 | /* Login FIFO DMA */ | |
858 | scsi_id->login_response = | |
a237f35f SR |
859 | pci_alloc_consistent(hi->host->pdev, |
860 | sizeof(struct sbp2_login_response), | |
1da177e4 LT |
861 | &scsi_id->login_response_dma); |
862 | if (!scsi_id->login_response) | |
863 | goto alloc_fail; | |
864 | SBP2_DMA_ALLOC("consistent DMA region for login FIFO"); | |
865 | ||
866 | /* Query logins ORB DMA */ | |
867 | scsi_id->query_logins_orb = | |
a237f35f SR |
868 | pci_alloc_consistent(hi->host->pdev, |
869 | sizeof(struct sbp2_query_logins_orb), | |
1da177e4 LT |
870 | &scsi_id->query_logins_orb_dma); |
871 | if (!scsi_id->query_logins_orb) | |
872 | goto alloc_fail; | |
873 | SBP2_DMA_ALLOC("consistent DMA region for query logins ORB"); | |
874 | ||
875 | /* Query logins response DMA */ | |
876 | scsi_id->query_logins_response = | |
a237f35f SR |
877 | pci_alloc_consistent(hi->host->pdev, |
878 | sizeof(struct sbp2_query_logins_response), | |
1da177e4 LT |
879 | &scsi_id->query_logins_response_dma); |
880 | if (!scsi_id->query_logins_response) | |
881 | goto alloc_fail; | |
882 | SBP2_DMA_ALLOC("consistent DMA region for query logins response"); | |
883 | ||
884 | /* Reconnect ORB DMA */ | |
885 | scsi_id->reconnect_orb = | |
a237f35f SR |
886 | pci_alloc_consistent(hi->host->pdev, |
887 | sizeof(struct sbp2_reconnect_orb), | |
1da177e4 LT |
888 | &scsi_id->reconnect_orb_dma); |
889 | if (!scsi_id->reconnect_orb) | |
890 | goto alloc_fail; | |
891 | SBP2_DMA_ALLOC("consistent DMA region for reconnect ORB"); | |
892 | ||
893 | /* Logout ORB DMA */ | |
894 | scsi_id->logout_orb = | |
a237f35f SR |
895 | pci_alloc_consistent(hi->host->pdev, |
896 | sizeof(struct sbp2_logout_orb), | |
1da177e4 LT |
897 | &scsi_id->logout_orb_dma); |
898 | if (!scsi_id->logout_orb) | |
899 | goto alloc_fail; | |
900 | SBP2_DMA_ALLOC("consistent DMA region for logout ORB"); | |
901 | ||
902 | /* Login ORB DMA */ | |
903 | scsi_id->login_orb = | |
a237f35f SR |
904 | pci_alloc_consistent(hi->host->pdev, |
905 | sizeof(struct sbp2_login_orb), | |
1da177e4 | 906 | &scsi_id->login_orb_dma); |
eaceec7f SR |
907 | if (!scsi_id->login_orb) |
908 | goto alloc_fail; | |
1da177e4 LT |
909 | SBP2_DMA_ALLOC("consistent DMA region for login ORB"); |
910 | ||
911 | SBP2_DEBUG("New SBP-2 device inserted, SCSI ID = %x", scsi_id->ud->id); | |
912 | ||
913 | /* | |
914 | * Create our command orb pool | |
915 | */ | |
916 | if (sbp2util_create_command_orb_pool(scsi_id)) { | |
917 | SBP2_ERR("sbp2util_create_command_orb_pool failed!"); | |
918 | sbp2_remove_device(scsi_id); | |
919 | return -ENOMEM; | |
920 | } | |
921 | ||
922 | /* Schedule a timeout here. The reason is that we may be so close | |
923 | * to a bus reset, that the device is not available for logins. | |
924 | * This can happen when the bus reset is caused by the host | |
925 | * connected to the sbp2 device being removed. That host would | |
926 | * have a certain amount of time to relogin before the sbp2 device | |
927 | * allows someone else to login instead. One second makes sense. */ | |
928 | msleep_interruptible(1000); | |
929 | if (signal_pending(current)) { | |
1da177e4 LT |
930 | sbp2_remove_device(scsi_id); |
931 | return -EINTR; | |
932 | } | |
a237f35f | 933 | |
1da177e4 LT |
934 | /* |
935 | * Login to the sbp-2 device | |
936 | */ | |
937 | if (sbp2_login_device(scsi_id)) { | |
938 | /* Login failed, just remove the device. */ | |
939 | sbp2_remove_device(scsi_id); | |
940 | return -EBUSY; | |
941 | } | |
942 | ||
943 | /* | |
944 | * Set max retries to something large on the device | |
945 | */ | |
946 | sbp2_set_busy_timeout(scsi_id); | |
947 | ||
948 | /* | |
949 | * Do a SBP-2 fetch agent reset | |
950 | */ | |
951 | sbp2_agent_reset(scsi_id, 1); | |
952 | ||
953 | /* | |
954 | * Get the max speed and packet size that we can use | |
955 | */ | |
956 | sbp2_max_speed_and_size(scsi_id); | |
957 | ||
958 | /* Add this device to the scsi layer now */ | |
146f7262 JB |
959 | error = scsi_add_device(scsi_id->scsi_host, 0, scsi_id->ud->id, 0); |
960 | if (error) { | |
1da177e4 | 961 | SBP2_ERR("scsi_add_device failed"); |
dc3edd54 SR |
962 | sbp2_logout_device(scsi_id); |
963 | sbp2_remove_device(scsi_id); | |
146f7262 | 964 | return error; |
1da177e4 LT |
965 | } |
966 | ||
967 | return 0; | |
eaceec7f SR |
968 | |
969 | alloc_fail: | |
970 | SBP2_ERR("Could not allocate memory for scsi_id"); | |
971 | sbp2_remove_device(scsi_id); | |
972 | return -ENOMEM; | |
1da177e4 LT |
973 | } |
974 | ||
975 | /* | |
976 | * This function removes an sbp2 device from the sbp2scsi_host_info struct. | |
977 | */ | |
978 | static void sbp2_remove_device(struct scsi_id_instance_data *scsi_id) | |
979 | { | |
980 | struct sbp2scsi_host_info *hi; | |
981 | ||
d024ebc6 | 982 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
983 | |
984 | if (!scsi_id) | |
985 | return; | |
986 | ||
987 | hi = scsi_id->hi; | |
988 | ||
989 | /* This will remove our scsi device aswell */ | |
990 | if (scsi_id->scsi_host) { | |
991 | scsi_remove_host(scsi_id->scsi_host); | |
992 | scsi_host_put(scsi_id->scsi_host); | |
993 | } | |
994 | ||
995 | sbp2util_remove_command_orb_pool(scsi_id); | |
996 | ||
997 | list_del(&scsi_id->scsi_list); | |
998 | ||
999 | if (scsi_id->login_response) { | |
1000 | pci_free_consistent(hi->host->pdev, | |
1001 | sizeof(struct sbp2_login_response), | |
1002 | scsi_id->login_response, | |
1003 | scsi_id->login_response_dma); | |
1004 | SBP2_DMA_FREE("single login FIFO"); | |
1005 | } | |
1006 | ||
1007 | if (scsi_id->login_orb) { | |
1008 | pci_free_consistent(hi->host->pdev, | |
1009 | sizeof(struct sbp2_login_orb), | |
1010 | scsi_id->login_orb, | |
1011 | scsi_id->login_orb_dma); | |
1012 | SBP2_DMA_FREE("single login ORB"); | |
1013 | } | |
1014 | ||
1015 | if (scsi_id->reconnect_orb) { | |
1016 | pci_free_consistent(hi->host->pdev, | |
1017 | sizeof(struct sbp2_reconnect_orb), | |
1018 | scsi_id->reconnect_orb, | |
1019 | scsi_id->reconnect_orb_dma); | |
1020 | SBP2_DMA_FREE("single reconnect orb"); | |
1021 | } | |
1022 | ||
1023 | if (scsi_id->logout_orb) { | |
1024 | pci_free_consistent(hi->host->pdev, | |
1025 | sizeof(struct sbp2_logout_orb), | |
1026 | scsi_id->logout_orb, | |
1027 | scsi_id->logout_orb_dma); | |
1028 | SBP2_DMA_FREE("single logout orb"); | |
1029 | } | |
1030 | ||
1031 | if (scsi_id->query_logins_orb) { | |
1032 | pci_free_consistent(hi->host->pdev, | |
1033 | sizeof(struct sbp2_query_logins_orb), | |
1034 | scsi_id->query_logins_orb, | |
1035 | scsi_id->query_logins_orb_dma); | |
1036 | SBP2_DMA_FREE("single query logins orb"); | |
1037 | } | |
1038 | ||
1039 | if (scsi_id->query_logins_response) { | |
1040 | pci_free_consistent(hi->host->pdev, | |
1041 | sizeof(struct sbp2_query_logins_response), | |
1042 | scsi_id->query_logins_response, | |
1043 | scsi_id->query_logins_response_dma); | |
1044 | SBP2_DMA_FREE("single query logins data"); | |
1045 | } | |
1046 | ||
35bdddb8 SR |
1047 | if (scsi_id->status_fifo_addr) |
1048 | hpsb_unregister_addrspace(&sbp2_highlevel, hi->host, | |
1049 | scsi_id->status_fifo_addr); | |
1050 | ||
1da177e4 LT |
1051 | scsi_id->ud->device.driver_data = NULL; |
1052 | ||
147830f2 SR |
1053 | if (hi) |
1054 | module_put(hi->host->driver->owner); | |
1055 | ||
1da177e4 LT |
1056 | SBP2_DEBUG("SBP-2 device removed, SCSI ID = %d", scsi_id->ud->id); |
1057 | ||
1058 | kfree(scsi_id); | |
1059 | } | |
1060 | ||
1061 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA | |
1062 | /* | |
1063 | * This function deals with physical dma write requests (for adapters that do not support | |
1064 | * physical dma in hardware). Mostly just here for debugging... | |
1065 | */ | |
a237f35f SR |
1066 | static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid, |
1067 | int destid, quadlet_t *data, u64 addr, | |
1068 | size_t length, u16 flags) | |
1da177e4 LT |
1069 | { |
1070 | ||
a237f35f SR |
1071 | /* |
1072 | * Manually put the data in the right place. | |
1073 | */ | |
1074 | memcpy(bus_to_virt((u32) addr), data, length); | |
1075 | sbp2util_packet_dump(data, length, "sbp2 phys dma write by device", | |
1076 | (u32) addr); | |
1077 | return RCODE_COMPLETE; | |
1da177e4 LT |
1078 | } |
1079 | ||
1080 | /* | |
1081 | * This function deals with physical dma read requests (for adapters that do not support | |
1082 | * physical dma in hardware). Mostly just here for debugging... | |
1083 | */ | |
a237f35f SR |
1084 | static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid, |
1085 | quadlet_t *data, u64 addr, size_t length, | |
1086 | u16 flags) | |
1da177e4 LT |
1087 | { |
1088 | ||
a237f35f SR |
1089 | /* |
1090 | * Grab data from memory and send a read response. | |
1091 | */ | |
1092 | memcpy(data, bus_to_virt((u32) addr), length); | |
1093 | sbp2util_packet_dump(data, length, "sbp2 phys dma read by device", | |
1094 | (u32) addr); | |
1095 | return RCODE_COMPLETE; | |
1da177e4 LT |
1096 | } |
1097 | #endif | |
1098 | ||
1da177e4 LT |
1099 | /************************************** |
1100 | * SBP-2 protocol related section | |
1101 | **************************************/ | |
1102 | ||
1da177e4 LT |
1103 | /* |
1104 | * This function queries the device for the maximum concurrent logins it | |
1105 | * supports. | |
1106 | */ | |
1107 | static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id) | |
1108 | { | |
1109 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1110 | quadlet_t data[2]; | |
1111 | int max_logins; | |
1112 | int active_logins; | |
1113 | ||
d024ebc6 | 1114 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
1115 | |
1116 | scsi_id->query_logins_orb->reserved1 = 0x0; | |
1117 | scsi_id->query_logins_orb->reserved2 = 0x0; | |
1118 | ||
1119 | scsi_id->query_logins_orb->query_response_lo = scsi_id->query_logins_response_dma; | |
1120 | scsi_id->query_logins_orb->query_response_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1da177e4 LT |
1121 | |
1122 | scsi_id->query_logins_orb->lun_misc = ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST); | |
1123 | scsi_id->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1); | |
e309fc6d | 1124 | scsi_id->query_logins_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_lun); |
1da177e4 LT |
1125 | |
1126 | scsi_id->query_logins_orb->reserved_resp_length = | |
1127 | ORB_SET_QUERY_LOGINS_RESP_LENGTH(sizeof(struct sbp2_query_logins_response)); | |
1da177e4 | 1128 | |
35bdddb8 SR |
1129 | scsi_id->query_logins_orb->status_fifo_hi = |
1130 | ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id); | |
1131 | scsi_id->query_logins_orb->status_fifo_lo = | |
1132 | ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr); | |
1da177e4 LT |
1133 | |
1134 | sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb)); | |
1135 | ||
1da177e4 LT |
1136 | sbp2util_packet_dump(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb), |
1137 | "sbp2 query logins orb", scsi_id->query_logins_orb_dma); | |
1138 | ||
1139 | memset(scsi_id->query_logins_response, 0, sizeof(struct sbp2_query_logins_response)); | |
1140 | memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); | |
1141 | ||
1da177e4 LT |
1142 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
1143 | data[1] = scsi_id->query_logins_orb_dma; | |
1144 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1145 | ||
1146 | atomic_set(&scsi_id->sbp2_login_complete, 0); | |
1147 | ||
1da177e4 | 1148 | hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8); |
1da177e4 LT |
1149 | |
1150 | if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 2*HZ)) { | |
1151 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); | |
a237f35f | 1152 | return -EIO; |
1da177e4 LT |
1153 | } |
1154 | ||
1155 | if (scsi_id->status_block.ORB_offset_lo != scsi_id->query_logins_orb_dma) { | |
1156 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); | |
a237f35f | 1157 | return -EIO; |
1da177e4 LT |
1158 | } |
1159 | ||
1160 | if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) || | |
1161 | STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) || | |
1162 | STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) { | |
1163 | ||
1164 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); | |
a237f35f | 1165 | return -EIO; |
1da177e4 LT |
1166 | } |
1167 | ||
1168 | sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_response, sizeof(struct sbp2_query_logins_response)); | |
1169 | ||
1170 | SBP2_DEBUG("length_max_logins = %x", | |
1171 | (unsigned int)scsi_id->query_logins_response->length_max_logins); | |
1172 | ||
1173 | SBP2_DEBUG("Query logins to SBP-2 device successful"); | |
1174 | ||
1175 | max_logins = RESPONSE_GET_MAX_LOGINS(scsi_id->query_logins_response->length_max_logins); | |
1176 | SBP2_DEBUG("Maximum concurrent logins supported: %d", max_logins); | |
1177 | ||
1178 | active_logins = RESPONSE_GET_ACTIVE_LOGINS(scsi_id->query_logins_response->length_max_logins); | |
1179 | SBP2_DEBUG("Number of active logins: %d", active_logins); | |
1180 | ||
1181 | if (active_logins >= max_logins) { | |
a237f35f | 1182 | return -EIO; |
1da177e4 LT |
1183 | } |
1184 | ||
1185 | return 0; | |
1186 | } | |
1187 | ||
1188 | /* | |
1189 | * This function is called in order to login to a particular SBP-2 device, | |
1190 | * after a bus reset. | |
1191 | */ | |
1192 | static int sbp2_login_device(struct scsi_id_instance_data *scsi_id) | |
1193 | { | |
1194 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1195 | quadlet_t data[2]; | |
1196 | ||
d024ebc6 | 1197 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
1198 | |
1199 | if (!scsi_id->login_orb) { | |
d024ebc6 | 1200 | SBP2_DEBUG("%s: login_orb not alloc'd!", __FUNCTION__); |
a237f35f | 1201 | return -EIO; |
1da177e4 LT |
1202 | } |
1203 | ||
1204 | if (!exclusive_login) { | |
1205 | if (sbp2_query_logins(scsi_id)) { | |
1206 | SBP2_INFO("Device does not support any more concurrent logins"); | |
a237f35f | 1207 | return -EIO; |
1da177e4 LT |
1208 | } |
1209 | } | |
1210 | ||
1211 | /* Set-up login ORB, assume no password */ | |
1212 | scsi_id->login_orb->password_hi = 0; | |
1213 | scsi_id->login_orb->password_lo = 0; | |
1da177e4 LT |
1214 | |
1215 | scsi_id->login_orb->login_response_lo = scsi_id->login_response_dma; | |
1216 | scsi_id->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1da177e4 LT |
1217 | |
1218 | scsi_id->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST); | |
1219 | scsi_id->login_orb->lun_misc |= ORB_SET_RECONNECT(0); /* One second reconnect time */ | |
1220 | scsi_id->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(exclusive_login); /* Exclusive access to device */ | |
1221 | scsi_id->login_orb->lun_misc |= ORB_SET_NOTIFY(1); /* Notify us of login complete */ | |
e309fc6d | 1222 | scsi_id->login_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_lun); |
1da177e4 LT |
1223 | |
1224 | scsi_id->login_orb->passwd_resp_lengths = | |
1225 | ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response)); | |
1da177e4 | 1226 | |
35bdddb8 SR |
1227 | scsi_id->login_orb->status_fifo_hi = |
1228 | ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id); | |
1229 | scsi_id->login_orb->status_fifo_lo = | |
1230 | ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr); | |
1da177e4 | 1231 | |
1da177e4 LT |
1232 | sbp2util_cpu_to_be32_buffer(scsi_id->login_orb, sizeof(struct sbp2_login_orb)); |
1233 | ||
1da177e4 LT |
1234 | sbp2util_packet_dump(scsi_id->login_orb, sizeof(struct sbp2_login_orb), |
1235 | "sbp2 login orb", scsi_id->login_orb_dma); | |
1236 | ||
1da177e4 LT |
1237 | memset(scsi_id->login_response, 0, sizeof(struct sbp2_login_response)); |
1238 | memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); | |
1239 | ||
1da177e4 LT |
1240 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
1241 | data[1] = scsi_id->login_orb_dma; | |
1242 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1243 | ||
1244 | atomic_set(&scsi_id->sbp2_login_complete, 0); | |
1245 | ||
1da177e4 | 1246 | hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8); |
1da177e4 LT |
1247 | |
1248 | /* | |
1249 | * Wait for login status (up to 20 seconds)... | |
1250 | */ | |
1251 | if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 20*HZ)) { | |
1252 | SBP2_ERR("Error logging into SBP-2 device - login timed-out"); | |
a237f35f | 1253 | return -EIO; |
1da177e4 LT |
1254 | } |
1255 | ||
1256 | /* | |
1257 | * Sanity. Make sure status returned matches login orb. | |
1258 | */ | |
1259 | if (scsi_id->status_block.ORB_offset_lo != scsi_id->login_orb_dma) { | |
1260 | SBP2_ERR("Error logging into SBP-2 device - login timed-out"); | |
a237f35f | 1261 | return -EIO; |
1da177e4 LT |
1262 | } |
1263 | ||
1264 | /* | |
1265 | * Check status | |
1266 | */ | |
1267 | if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) || | |
1268 | STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) || | |
1269 | STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) { | |
1270 | ||
1271 | SBP2_ERR("Error logging into SBP-2 device - login failed"); | |
a237f35f | 1272 | return -EIO; |
1da177e4 LT |
1273 | } |
1274 | ||
1275 | /* | |
1276 | * Byte swap the login response, for use when reconnecting or | |
1277 | * logging out. | |
1278 | */ | |
1279 | sbp2util_cpu_to_be32_buffer(scsi_id->login_response, sizeof(struct sbp2_login_response)); | |
1280 | ||
1281 | /* | |
1282 | * Grab our command block agent address from the login response. | |
1283 | */ | |
1284 | SBP2_DEBUG("command_block_agent_hi = %x", | |
1285 | (unsigned int)scsi_id->login_response->command_block_agent_hi); | |
1286 | SBP2_DEBUG("command_block_agent_lo = %x", | |
1287 | (unsigned int)scsi_id->login_response->command_block_agent_lo); | |
1288 | ||
1289 | scsi_id->sbp2_command_block_agent_addr = | |
1290 | ((u64)scsi_id->login_response->command_block_agent_hi) << 32; | |
1291 | scsi_id->sbp2_command_block_agent_addr |= ((u64)scsi_id->login_response->command_block_agent_lo); | |
1292 | scsi_id->sbp2_command_block_agent_addr &= 0x0000ffffffffffffULL; | |
1293 | ||
1294 | SBP2_INFO("Logged into SBP-2 device"); | |
1295 | ||
a237f35f | 1296 | return 0; |
1da177e4 LT |
1297 | |
1298 | } | |
1299 | ||
1300 | /* | |
1301 | * This function is called in order to logout from a particular SBP-2 | |
1302 | * device, usually called during driver unload. | |
1303 | */ | |
1304 | static int sbp2_logout_device(struct scsi_id_instance_data *scsi_id) | |
1305 | { | |
1306 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1307 | quadlet_t data[2]; | |
1308 | int error; | |
1309 | ||
d024ebc6 | 1310 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
1311 | |
1312 | /* | |
1313 | * Set-up logout ORB | |
1314 | */ | |
1315 | scsi_id->logout_orb->reserved1 = 0x0; | |
1316 | scsi_id->logout_orb->reserved2 = 0x0; | |
1317 | scsi_id->logout_orb->reserved3 = 0x0; | |
1318 | scsi_id->logout_orb->reserved4 = 0x0; | |
1319 | ||
1320 | scsi_id->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST); | |
1321 | scsi_id->logout_orb->login_ID_misc |= ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID); | |
1322 | ||
1323 | /* Notify us when complete */ | |
1324 | scsi_id->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1); | |
1325 | ||
1326 | scsi_id->logout_orb->reserved5 = 0x0; | |
35bdddb8 SR |
1327 | scsi_id->logout_orb->status_fifo_hi = |
1328 | ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id); | |
1329 | scsi_id->logout_orb->status_fifo_lo = | |
1330 | ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr); | |
1da177e4 LT |
1331 | |
1332 | /* | |
1333 | * Byte swap ORB if necessary | |
1334 | */ | |
1335 | sbp2util_cpu_to_be32_buffer(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb)); | |
1336 | ||
1337 | sbp2util_packet_dump(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb), | |
1338 | "sbp2 logout orb", scsi_id->logout_orb_dma); | |
1339 | ||
1340 | /* | |
1341 | * Ok, let's write to the target's management agent register | |
1342 | */ | |
1343 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); | |
1344 | data[1] = scsi_id->logout_orb_dma; | |
1345 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1346 | ||
1347 | atomic_set(&scsi_id->sbp2_login_complete, 0); | |
1348 | ||
1349 | error = hpsb_node_write(scsi_id->ne, | |
a237f35f | 1350 | scsi_id->sbp2_management_agent_addr, data, 8); |
1da177e4 LT |
1351 | if (error) |
1352 | return error; | |
1353 | ||
1354 | /* Wait for device to logout...1 second. */ | |
1355 | if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ)) | |
1356 | return -EIO; | |
1357 | ||
1358 | SBP2_INFO("Logged out of SBP-2 device"); | |
1359 | ||
a237f35f | 1360 | return 0; |
1da177e4 LT |
1361 | |
1362 | } | |
1363 | ||
1364 | /* | |
1365 | * This function is called in order to reconnect to a particular SBP-2 | |
1366 | * device, after a bus reset. | |
1367 | */ | |
1368 | static int sbp2_reconnect_device(struct scsi_id_instance_data *scsi_id) | |
1369 | { | |
1370 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1371 | quadlet_t data[2]; | |
1372 | int error; | |
1373 | ||
d024ebc6 | 1374 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
1375 | |
1376 | /* | |
1377 | * Set-up reconnect ORB | |
1378 | */ | |
1379 | scsi_id->reconnect_orb->reserved1 = 0x0; | |
1380 | scsi_id->reconnect_orb->reserved2 = 0x0; | |
1381 | scsi_id->reconnect_orb->reserved3 = 0x0; | |
1382 | scsi_id->reconnect_orb->reserved4 = 0x0; | |
1383 | ||
1384 | scsi_id->reconnect_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST); | |
1385 | scsi_id->reconnect_orb->login_ID_misc |= | |
1386 | ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID); | |
1387 | ||
1388 | /* Notify us when complete */ | |
1389 | scsi_id->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1); | |
1390 | ||
1391 | scsi_id->reconnect_orb->reserved5 = 0x0; | |
35bdddb8 SR |
1392 | scsi_id->reconnect_orb->status_fifo_hi = |
1393 | ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id); | |
1394 | scsi_id->reconnect_orb->status_fifo_lo = | |
1395 | ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr); | |
1da177e4 LT |
1396 | |
1397 | /* | |
1398 | * Byte swap ORB if necessary | |
1399 | */ | |
1400 | sbp2util_cpu_to_be32_buffer(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb)); | |
1401 | ||
1402 | sbp2util_packet_dump(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb), | |
1403 | "sbp2 reconnect orb", scsi_id->reconnect_orb_dma); | |
1404 | ||
1405 | /* | |
1406 | * Initialize status fifo | |
1407 | */ | |
1408 | memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); | |
1409 | ||
1410 | /* | |
1411 | * Ok, let's write to the target's management agent register | |
1412 | */ | |
1413 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); | |
1414 | data[1] = scsi_id->reconnect_orb_dma; | |
1415 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1416 | ||
1417 | atomic_set(&scsi_id->sbp2_login_complete, 0); | |
1418 | ||
1419 | error = hpsb_node_write(scsi_id->ne, | |
a237f35f | 1420 | scsi_id->sbp2_management_agent_addr, data, 8); |
1da177e4 LT |
1421 | if (error) |
1422 | return error; | |
1423 | ||
1424 | /* | |
1425 | * Wait for reconnect status (up to 1 second)... | |
1426 | */ | |
1427 | if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ)) { | |
1428 | SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out"); | |
a237f35f | 1429 | return -EIO; |
1da177e4 LT |
1430 | } |
1431 | ||
1432 | /* | |
1433 | * Sanity. Make sure status returned matches reconnect orb. | |
1434 | */ | |
1435 | if (scsi_id->status_block.ORB_offset_lo != scsi_id->reconnect_orb_dma) { | |
1436 | SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out"); | |
a237f35f | 1437 | return -EIO; |
1da177e4 LT |
1438 | } |
1439 | ||
1440 | /* | |
1441 | * Check status | |
1442 | */ | |
1443 | if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) || | |
1444 | STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) || | |
1445 | STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) { | |
1446 | ||
1447 | SBP2_ERR("Error reconnecting to SBP-2 device - reconnect failed"); | |
a237f35f | 1448 | return -EIO; |
1da177e4 LT |
1449 | } |
1450 | ||
1451 | HPSB_DEBUG("Reconnected to SBP-2 device"); | |
1452 | ||
a237f35f | 1453 | return 0; |
1da177e4 LT |
1454 | |
1455 | } | |
1456 | ||
1457 | /* | |
1458 | * This function is called in order to set the busy timeout (number of | |
1459 | * retries to attempt) on the sbp2 device. | |
1460 | */ | |
1461 | static int sbp2_set_busy_timeout(struct scsi_id_instance_data *scsi_id) | |
1462 | { | |
1463 | quadlet_t data; | |
1464 | ||
d024ebc6 | 1465 | SBP2_DEBUG_ENTER(); |
1da177e4 | 1466 | |
1da177e4 | 1467 | data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE); |
d024ebc6 SR |
1468 | if (hpsb_node_write(scsi_id->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4)) |
1469 | SBP2_ERR("%s error", __FUNCTION__); | |
a237f35f | 1470 | return 0; |
1da177e4 LT |
1471 | } |
1472 | ||
1da177e4 LT |
1473 | /* |
1474 | * This function is called to parse sbp2 device's config rom unit | |
1475 | * directory. Used to determine things like sbp2 management agent offset, | |
1476 | * and command set used (SCSI or RBC). | |
1477 | */ | |
1478 | static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id, | |
1479 | struct unit_directory *ud) | |
1480 | { | |
1481 | struct csr1212_keyval *kv; | |
1482 | struct csr1212_dentry *dentry; | |
1483 | u64 management_agent_addr; | |
1484 | u32 command_set_spec_id, command_set, unit_characteristics, | |
24d3bf88 SR |
1485 | firmware_revision; |
1486 | unsigned workarounds; | |
1da177e4 LT |
1487 | int i; |
1488 | ||
d024ebc6 | 1489 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
1490 | |
1491 | management_agent_addr = 0x0; | |
1492 | command_set_spec_id = 0x0; | |
1493 | command_set = 0x0; | |
1494 | unit_characteristics = 0x0; | |
1495 | firmware_revision = 0x0; | |
1496 | ||
1497 | /* Handle different fields in the unit directory, based on keys */ | |
1498 | csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) { | |
1499 | switch (kv->key.id) { | |
1500 | case CSR1212_KV_ID_DEPENDENT_INFO: | |
1501 | if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET) { | |
1502 | /* Save off the management agent address */ | |
1503 | management_agent_addr = | |
a237f35f SR |
1504 | CSR1212_REGISTER_SPACE_BASE + |
1505 | (kv->value.csr_offset << 2); | |
1da177e4 LT |
1506 | |
1507 | SBP2_DEBUG("sbp2_management_agent_addr = %x", | |
a237f35f | 1508 | (unsigned int)management_agent_addr); |
1da177e4 | 1509 | } else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { |
a237f35f SR |
1510 | scsi_id->sbp2_lun = |
1511 | ORB_SET_LUN(kv->value.immediate); | |
1da177e4 LT |
1512 | } |
1513 | break; | |
1514 | ||
1515 | case SBP2_COMMAND_SET_SPEC_ID_KEY: | |
1516 | /* Command spec organization */ | |
1517 | command_set_spec_id = kv->value.immediate; | |
1518 | SBP2_DEBUG("sbp2_command_set_spec_id = %x", | |
a237f35f | 1519 | (unsigned int)command_set_spec_id); |
1da177e4 LT |
1520 | break; |
1521 | ||
1522 | case SBP2_COMMAND_SET_KEY: | |
1523 | /* Command set used by sbp2 device */ | |
1524 | command_set = kv->value.immediate; | |
1525 | SBP2_DEBUG("sbp2_command_set = %x", | |
a237f35f | 1526 | (unsigned int)command_set); |
1da177e4 LT |
1527 | break; |
1528 | ||
1529 | case SBP2_UNIT_CHARACTERISTICS_KEY: | |
1530 | /* | |
1531 | * Unit characterisitcs (orb related stuff | |
1532 | * that I'm not yet paying attention to) | |
1533 | */ | |
1534 | unit_characteristics = kv->value.immediate; | |
1535 | SBP2_DEBUG("sbp2_unit_characteristics = %x", | |
a237f35f | 1536 | (unsigned int)unit_characteristics); |
1da177e4 LT |
1537 | break; |
1538 | ||
1539 | case SBP2_FIRMWARE_REVISION_KEY: | |
1540 | /* Firmware revision */ | |
1541 | firmware_revision = kv->value.immediate; | |
24d3bf88 SR |
1542 | SBP2_DEBUG("sbp2_firmware_revision = %x", |
1543 | (unsigned int)firmware_revision); | |
1da177e4 LT |
1544 | break; |
1545 | ||
1546 | default: | |
1547 | break; | |
1548 | } | |
1549 | } | |
1550 | ||
24d3bf88 SR |
1551 | workarounds = sbp2_default_workarounds; |
1552 | if (force_inquiry_hack) { | |
1553 | SBP2_WARN("force_inquiry_hack is deprecated. " | |
1554 | "Use parameter 'workarounds' instead."); | |
1555 | workarounds |= SBP2_WORKAROUND_INQUIRY_36; | |
1556 | } | |
1da177e4 | 1557 | |
24d3bf88 SR |
1558 | for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { |
1559 | if (sbp2_workarounds_table[i].firmware_revision != | |
1560 | (firmware_revision & 0xffff00)) | |
1561 | continue; | |
1562 | workarounds |= sbp2_workarounds_table[i].workarounds; | |
1563 | break; | |
1da177e4 LT |
1564 | } |
1565 | ||
24d3bf88 SR |
1566 | if (workarounds) |
1567 | SBP2_INFO("Workarounds for node " NODE_BUS_FMT ": " | |
1568 | "0x%x (firmware_revision 0x%x)", | |
1569 | NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid), | |
1570 | workarounds, firmware_revision); | |
1571 | ||
1572 | /* We would need one SCSI host template for each target to adjust | |
1573 | * max_sectors on the fly, therefore warn only. */ | |
1574 | if (workarounds & SBP2_WORKAROUND_128K_MAX_TRANS && | |
1575 | (max_sectors * 512) > (128 * 1024)) | |
1576 | SBP2_WARN("Node " NODE_BUS_FMT ": Bridge only supports 128KB " | |
1577 | "max transfer size. WARNING: Current max_sectors " | |
1578 | "setting is larger than 128KB (%d sectors)", | |
1579 | NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid), | |
1580 | max_sectors); | |
1581 | ||
1da177e4 LT |
1582 | /* If this is a logical unit directory entry, process the parent |
1583 | * to get the values. */ | |
1584 | if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) { | |
1585 | struct unit_directory *parent_ud = | |
1586 | container_of(ud->device.parent, struct unit_directory, device); | |
1587 | sbp2_parse_unit_directory(scsi_id, parent_ud); | |
1588 | } else { | |
1589 | scsi_id->sbp2_management_agent_addr = management_agent_addr; | |
1590 | scsi_id->sbp2_command_set_spec_id = command_set_spec_id; | |
1591 | scsi_id->sbp2_command_set = command_set; | |
1592 | scsi_id->sbp2_unit_characteristics = unit_characteristics; | |
1593 | scsi_id->sbp2_firmware_revision = firmware_revision; | |
1594 | scsi_id->workarounds = workarounds; | |
1595 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN) | |
e309fc6d | 1596 | scsi_id->sbp2_lun = ORB_SET_LUN(ud->lun); |
1da177e4 LT |
1597 | } |
1598 | } | |
1599 | ||
1600 | /* | |
1601 | * This function is called in order to determine the max speed and packet | |
1602 | * size we can use in our ORBs. Note, that we (the driver and host) only | |
1603 | * initiate the transaction. The SBP-2 device actually transfers the data | |
1604 | * (by reading from the DMA area we tell it). This means that the SBP-2 | |
1605 | * device decides the actual maximum data it can transfer. We just tell it | |
1606 | * the speed that it needs to use, and the max_rec the host supports, and | |
1607 | * it takes care of the rest. | |
1608 | */ | |
1609 | static int sbp2_max_speed_and_size(struct scsi_id_instance_data *scsi_id) | |
1610 | { | |
1611 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1612 | ||
d024ebc6 | 1613 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
1614 | |
1615 | /* Initial setting comes from the hosts speed map */ | |
a237f35f SR |
1616 | scsi_id->speed_code = |
1617 | hi->host->speed_map[NODEID_TO_NODE(hi->host->node_id) * 64 + | |
1618 | NODEID_TO_NODE(scsi_id->ne->nodeid)]; | |
1da177e4 LT |
1619 | |
1620 | /* Bump down our speed if the user requested it */ | |
1621 | if (scsi_id->speed_code > max_speed) { | |
1622 | scsi_id->speed_code = max_speed; | |
1623 | SBP2_ERR("Forcing SBP-2 max speed down to %s", | |
1624 | hpsb_speedto_str[scsi_id->speed_code]); | |
1625 | } | |
1626 | ||
1627 | /* Payload size is the lesser of what our speed supports and what | |
1628 | * our host supports. */ | |
a237f35f SR |
1629 | scsi_id->max_payload_size = |
1630 | min(sbp2_speedto_max_payload[scsi_id->speed_code], | |
1631 | (u8) (hi->host->csr.max_rec - 1)); | |
1da177e4 LT |
1632 | |
1633 | HPSB_DEBUG("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]", | |
1634 | NODE_BUS_ARGS(hi->host, scsi_id->ne->nodeid), | |
1635 | hpsb_speedto_str[scsi_id->speed_code], | |
a237f35f | 1636 | 1 << ((u32) scsi_id->max_payload_size + 2)); |
1da177e4 | 1637 | |
a237f35f | 1638 | return 0; |
1da177e4 LT |
1639 | } |
1640 | ||
1641 | /* | |
1642 | * This function is called in order to perform a SBP-2 agent reset. | |
1643 | */ | |
1644 | static int sbp2_agent_reset(struct scsi_id_instance_data *scsi_id, int wait) | |
1645 | { | |
1646 | quadlet_t data; | |
1647 | u64 addr; | |
1648 | int retval; | |
1649 | ||
d024ebc6 | 1650 | SBP2_DEBUG_ENTER(); |
1da177e4 | 1651 | |
1da177e4 LT |
1652 | data = ntohl(SBP2_AGENT_RESET_DATA); |
1653 | addr = scsi_id->sbp2_command_block_agent_addr + SBP2_AGENT_RESET_OFFSET; | |
1654 | ||
1655 | if (wait) | |
1656 | retval = hpsb_node_write(scsi_id->ne, addr, &data, 4); | |
1657 | else | |
1658 | retval = sbp2util_node_write_no_wait(scsi_id->ne, addr, &data, 4); | |
1659 | ||
1660 | if (retval < 0) { | |
1661 | SBP2_ERR("hpsb_node_write failed.\n"); | |
1662 | return -EIO; | |
1663 | } | |
1664 | ||
1665 | /* | |
1666 | * Need to make sure orb pointer is written on next command | |
1667 | */ | |
1668 | scsi_id->last_orb = NULL; | |
1669 | ||
a237f35f | 1670 | return 0; |
1da177e4 LT |
1671 | } |
1672 | ||
cf8d2c09 SR |
1673 | static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb, |
1674 | struct sbp2scsi_host_info *hi, | |
1675 | struct sbp2_command_info *command, | |
1676 | unsigned int scsi_use_sg, | |
1677 | struct scatterlist *sgpnt, | |
1678 | u32 orb_direction, | |
1679 | enum dma_data_direction dma_dir) | |
1680 | { | |
1681 | command->dma_dir = dma_dir; | |
1682 | orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1683 | orb->misc |= ORB_SET_DIRECTION(orb_direction); | |
1684 | ||
1685 | /* Special case if only one element (and less than 64KB in size) */ | |
1686 | if ((scsi_use_sg == 1) && | |
1687 | (sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) { | |
1688 | ||
1689 | SBP2_DEBUG("Only one s/g element"); | |
1690 | command->dma_size = sgpnt[0].length; | |
1691 | command->dma_type = CMD_DMA_PAGE; | |
1692 | command->cmd_dma = pci_map_page(hi->host->pdev, | |
1693 | sgpnt[0].page, | |
1694 | sgpnt[0].offset, | |
1695 | command->dma_size, | |
1696 | command->dma_dir); | |
1697 | SBP2_DMA_ALLOC("single page scatter element"); | |
1698 | ||
1699 | orb->data_descriptor_lo = command->cmd_dma; | |
1700 | orb->misc |= ORB_SET_DATA_SIZE(command->dma_size); | |
1701 | ||
1702 | } else { | |
1703 | struct sbp2_unrestricted_page_table *sg_element = | |
1704 | &command->scatter_gather_element[0]; | |
1705 | u32 sg_count, sg_len; | |
1706 | dma_addr_t sg_addr; | |
1707 | int i, count = pci_map_sg(hi->host->pdev, sgpnt, scsi_use_sg, | |
1708 | dma_dir); | |
1709 | ||
1710 | SBP2_DMA_ALLOC("scatter list"); | |
1711 | ||
1712 | command->dma_size = scsi_use_sg; | |
1713 | command->sge_buffer = sgpnt; | |
1714 | ||
1715 | /* use page tables (s/g) */ | |
1716 | orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); | |
1717 | orb->data_descriptor_lo = command->sge_dma; | |
1718 | ||
1719 | /* | |
1720 | * Loop through and fill out our sbp-2 page tables | |
1721 | * (and split up anything too large) | |
1722 | */ | |
1723 | for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) { | |
1724 | sg_len = sg_dma_len(sgpnt); | |
1725 | sg_addr = sg_dma_address(sgpnt); | |
1726 | while (sg_len) { | |
1727 | sg_element[sg_count].segment_base_lo = sg_addr; | |
1728 | if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { | |
1729 | sg_element[sg_count].length_segment_base_hi = | |
1730 | PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); | |
1731 | sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; | |
1732 | sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; | |
1733 | } else { | |
1734 | sg_element[sg_count].length_segment_base_hi = | |
1735 | PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); | |
1736 | sg_len = 0; | |
1737 | } | |
1738 | sg_count++; | |
1739 | } | |
1740 | } | |
1741 | ||
1742 | /* Number of page table (s/g) elements */ | |
1743 | orb->misc |= ORB_SET_DATA_SIZE(sg_count); | |
1744 | ||
1745 | sbp2util_packet_dump(sg_element, | |
1746 | (sizeof(struct sbp2_unrestricted_page_table)) * sg_count, | |
1747 | "sbp2 s/g list", command->sge_dma); | |
1748 | ||
1749 | /* Byte swap page tables if necessary */ | |
1750 | sbp2util_cpu_to_be32_buffer(sg_element, | |
1751 | (sizeof(struct sbp2_unrestricted_page_table)) * | |
1752 | sg_count); | |
1753 | } | |
1754 | } | |
1755 | ||
1756 | static void sbp2_prep_command_orb_no_sg(struct sbp2_command_orb *orb, | |
1757 | struct sbp2scsi_host_info *hi, | |
1758 | struct sbp2_command_info *command, | |
1759 | struct scatterlist *sgpnt, | |
1760 | u32 orb_direction, | |
1761 | unsigned int scsi_request_bufflen, | |
1762 | void *scsi_request_buffer, | |
1763 | enum dma_data_direction dma_dir) | |
1764 | { | |
1765 | command->dma_dir = dma_dir; | |
1766 | command->dma_size = scsi_request_bufflen; | |
1767 | command->dma_type = CMD_DMA_SINGLE; | |
1768 | command->cmd_dma = pci_map_single(hi->host->pdev, scsi_request_buffer, | |
1769 | command->dma_size, command->dma_dir); | |
1770 | orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1771 | orb->misc |= ORB_SET_DIRECTION(orb_direction); | |
1772 | ||
1773 | SBP2_DMA_ALLOC("single bulk"); | |
1774 | ||
1775 | /* | |
1776 | * Handle case where we get a command w/o s/g enabled (but | |
1777 | * check for transfers larger than 64K) | |
1778 | */ | |
1779 | if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) { | |
1780 | ||
1781 | orb->data_descriptor_lo = command->cmd_dma; | |
1782 | orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen); | |
1783 | ||
1784 | } else { | |
1785 | struct sbp2_unrestricted_page_table *sg_element = | |
1786 | &command->scatter_gather_element[0]; | |
1787 | u32 sg_count, sg_len; | |
1788 | dma_addr_t sg_addr; | |
1789 | ||
1790 | /* | |
1791 | * Need to turn this into page tables, since the | |
1792 | * buffer is too large. | |
1793 | */ | |
1794 | orb->data_descriptor_lo = command->sge_dma; | |
1795 | ||
1796 | /* Use page tables (s/g) */ | |
1797 | orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); | |
1798 | ||
1799 | /* | |
1800 | * fill out our sbp-2 page tables (and split up | |
1801 | * the large buffer) | |
1802 | */ | |
1803 | sg_count = 0; | |
1804 | sg_len = scsi_request_bufflen; | |
1805 | sg_addr = command->cmd_dma; | |
1806 | while (sg_len) { | |
1807 | sg_element[sg_count].segment_base_lo = sg_addr; | |
1808 | if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { | |
1809 | sg_element[sg_count].length_segment_base_hi = | |
1810 | PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); | |
1811 | sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; | |
1812 | sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; | |
1813 | } else { | |
1814 | sg_element[sg_count].length_segment_base_hi = | |
1815 | PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); | |
1816 | sg_len = 0; | |
1817 | } | |
1818 | sg_count++; | |
1819 | } | |
1820 | ||
1821 | /* Number of page table (s/g) elements */ | |
1822 | orb->misc |= ORB_SET_DATA_SIZE(sg_count); | |
1823 | ||
1824 | sbp2util_packet_dump(sg_element, | |
1825 | (sizeof(struct sbp2_unrestricted_page_table)) * sg_count, | |
1826 | "sbp2 s/g list", command->sge_dma); | |
1827 | ||
1828 | /* Byte swap page tables if necessary */ | |
1829 | sbp2util_cpu_to_be32_buffer(sg_element, | |
1830 | (sizeof(struct sbp2_unrestricted_page_table)) * | |
1831 | sg_count); | |
1832 | } | |
1833 | } | |
1834 | ||
1da177e4 LT |
1835 | /* |
1836 | * This function is called to create the actual command orb and s/g list | |
1837 | * out of the scsi command itself. | |
1838 | */ | |
cf8d2c09 SR |
1839 | static void sbp2_create_command_orb(struct scsi_id_instance_data *scsi_id, |
1840 | struct sbp2_command_info *command, | |
1841 | unchar *scsi_cmd, | |
1842 | unsigned int scsi_use_sg, | |
1843 | unsigned int scsi_request_bufflen, | |
1844 | void *scsi_request_buffer, | |
1845 | enum dma_data_direction dma_dir) | |
1da177e4 LT |
1846 | { |
1847 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
a237f35f | 1848 | struct scatterlist *sgpnt = (struct scatterlist *)scsi_request_buffer; |
1da177e4 | 1849 | struct sbp2_command_orb *command_orb = &command->command_orb; |
cf8d2c09 | 1850 | u32 orb_direction; |
1da177e4 LT |
1851 | |
1852 | /* | |
1853 | * Set-up our command ORB.. | |
1854 | * | |
1855 | * NOTE: We're doing unrestricted page tables (s/g), as this is | |
1856 | * best performance (at least with the devices I have). This means | |
1857 | * that data_size becomes the number of s/g elements, and | |
1858 | * page_size should be zero (for unrestricted). | |
1859 | */ | |
1860 | command_orb->next_ORB_hi = ORB_SET_NULL_PTR(1); | |
1861 | command_orb->next_ORB_lo = 0x0; | |
1862 | command_orb->misc = ORB_SET_MAX_PAYLOAD(scsi_id->max_payload_size); | |
1863 | command_orb->misc |= ORB_SET_SPEED(scsi_id->speed_code); | |
a237f35f | 1864 | command_orb->misc |= ORB_SET_NOTIFY(1); /* Notify us when complete */ |
1da177e4 | 1865 | |
43863eba | 1866 | if (dma_dir == DMA_NONE) |
a237f35f | 1867 | orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; |
43863eba | 1868 | else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen) |
a237f35f | 1869 | orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA; |
43863eba | 1870 | else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen) |
a237f35f | 1871 | orb_direction = ORB_DIRECTION_READ_FROM_MEDIA; |
43863eba SR |
1872 | else { |
1873 | SBP2_WARN("Falling back to DMA_NONE"); | |
1874 | orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; | |
1da177e4 LT |
1875 | } |
1876 | ||
cf8d2c09 | 1877 | /* Set-up our pagetable stuff */ |
1da177e4 | 1878 | if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) { |
1da177e4 | 1879 | SBP2_DEBUG("No data transfer"); |
1da177e4 LT |
1880 | command_orb->data_descriptor_hi = 0x0; |
1881 | command_orb->data_descriptor_lo = 0x0; | |
1882 | command_orb->misc |= ORB_SET_DIRECTION(1); | |
1da177e4 | 1883 | } else if (scsi_use_sg) { |
1da177e4 | 1884 | SBP2_DEBUG("Use scatter/gather"); |
cf8d2c09 SR |
1885 | sbp2_prep_command_orb_sg(command_orb, hi, command, scsi_use_sg, |
1886 | sgpnt, orb_direction, dma_dir); | |
1da177e4 | 1887 | } else { |
1da177e4 | 1888 | SBP2_DEBUG("No scatter/gather"); |
cf8d2c09 SR |
1889 | sbp2_prep_command_orb_no_sg(command_orb, hi, command, sgpnt, |
1890 | orb_direction, scsi_request_bufflen, | |
1891 | scsi_request_buffer, dma_dir); | |
1da177e4 LT |
1892 | } |
1893 | ||
cf8d2c09 | 1894 | /* Byte swap command ORB if necessary */ |
1da177e4 LT |
1895 | sbp2util_cpu_to_be32_buffer(command_orb, sizeof(struct sbp2_command_orb)); |
1896 | ||
cf8d2c09 | 1897 | /* Put our scsi command in the command ORB */ |
1da177e4 LT |
1898 | memset(command_orb->cdb, 0, 12); |
1899 | memcpy(command_orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd)); | |
1da177e4 LT |
1900 | } |
1901 | ||
1902 | /* | |
1903 | * This function is called in order to begin a regular SBP-2 command. | |
1904 | */ | |
1905 | static int sbp2_link_orb_command(struct scsi_id_instance_data *scsi_id, | |
1906 | struct sbp2_command_info *command) | |
1907 | { | |
1908 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1909 | struct sbp2_command_orb *command_orb = &command->command_orb; | |
1910 | struct node_entry *ne = scsi_id->ne; | |
1911 | u64 addr; | |
1912 | ||
1913 | outstanding_orb_incr; | |
1914 | SBP2_ORB_DEBUG("sending command orb %p, total orbs = %x", | |
a237f35f | 1915 | command_orb, global_outstanding_command_orbs); |
1da177e4 LT |
1916 | |
1917 | pci_dma_sync_single_for_device(hi->host->pdev, command->command_orb_dma, | |
1918 | sizeof(struct sbp2_command_orb), | |
1919 | PCI_DMA_BIDIRECTIONAL); | |
1920 | pci_dma_sync_single_for_device(hi->host->pdev, command->sge_dma, | |
1921 | sizeof(command->scatter_gather_element), | |
1922 | PCI_DMA_BIDIRECTIONAL); | |
1923 | /* | |
1924 | * Check to see if there are any previous orbs to use | |
1925 | */ | |
1926 | if (scsi_id->last_orb == NULL) { | |
1927 | quadlet_t data[2]; | |
1928 | ||
1929 | /* | |
1930 | * Ok, let's write to the target's management agent register | |
1931 | */ | |
1932 | addr = scsi_id->sbp2_command_block_agent_addr + SBP2_ORB_POINTER_OFFSET; | |
1933 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); | |
1934 | data[1] = command->command_orb_dma; | |
1935 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1936 | ||
1937 | SBP2_ORB_DEBUG("write command agent, command orb %p", command_orb); | |
1938 | ||
1939 | if (sbp2util_node_write_no_wait(ne, addr, data, 8) < 0) { | |
1940 | SBP2_ERR("sbp2util_node_write_no_wait failed.\n"); | |
1941 | return -EIO; | |
1942 | } | |
1943 | ||
1944 | SBP2_ORB_DEBUG("write command agent complete"); | |
1945 | ||
1946 | scsi_id->last_orb = command_orb; | |
1947 | scsi_id->last_orb_dma = command->command_orb_dma; | |
1948 | ||
1949 | } else { | |
1950 | quadlet_t data; | |
1951 | ||
1952 | /* | |
1953 | * We have an orb already sent (maybe or maybe not | |
1954 | * processed) that we can append this orb to. So do so, | |
1955 | * and ring the doorbell. Have to be very careful | |
1956 | * modifying these next orb pointers, as they are accessed | |
1957 | * both by the sbp2 device and us. | |
1958 | */ | |
1959 | scsi_id->last_orb->next_ORB_lo = | |
a237f35f | 1960 | cpu_to_be32(command->command_orb_dma); |
1da177e4 LT |
1961 | /* Tells hardware that this pointer is valid */ |
1962 | scsi_id->last_orb->next_ORB_hi = 0x0; | |
a237f35f SR |
1963 | pci_dma_sync_single_for_device(hi->host->pdev, |
1964 | scsi_id->last_orb_dma, | |
1da177e4 LT |
1965 | sizeof(struct sbp2_command_orb), |
1966 | PCI_DMA_BIDIRECTIONAL); | |
1967 | ||
1968 | /* | |
1969 | * Ring the doorbell | |
1970 | */ | |
1971 | data = cpu_to_be32(command->command_orb_dma); | |
1972 | addr = scsi_id->sbp2_command_block_agent_addr + SBP2_DOORBELL_OFFSET; | |
1973 | ||
1974 | SBP2_ORB_DEBUG("ring doorbell, command orb %p", command_orb); | |
1975 | ||
1976 | if (sbp2util_node_write_no_wait(ne, addr, &data, 4) < 0) { | |
1977 | SBP2_ERR("sbp2util_node_write_no_wait failed"); | |
a237f35f | 1978 | return -EIO; |
1da177e4 LT |
1979 | } |
1980 | ||
1981 | scsi_id->last_orb = command_orb; | |
1982 | scsi_id->last_orb_dma = command->command_orb_dma; | |
1983 | ||
1984 | } | |
a237f35f | 1985 | return 0; |
1da177e4 LT |
1986 | } |
1987 | ||
1988 | /* | |
1989 | * This function is called in order to begin a regular SBP-2 command. | |
1990 | */ | |
1991 | static int sbp2_send_command(struct scsi_id_instance_data *scsi_id, | |
1992 | struct scsi_cmnd *SCpnt, | |
1993 | void (*done)(struct scsi_cmnd *)) | |
1994 | { | |
1995 | unchar *cmd = (unchar *) SCpnt->cmnd; | |
1996 | unsigned int request_bufflen = SCpnt->request_bufflen; | |
1997 | struct sbp2_command_info *command; | |
1998 | ||
d024ebc6 | 1999 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
2000 | SBP2_DEBUG("SCSI transfer size = %x", request_bufflen); |
2001 | SBP2_DEBUG("SCSI s/g elements = %x", (unsigned int)SCpnt->use_sg); | |
2002 | ||
2003 | /* | |
2004 | * Allocate a command orb and s/g structure | |
2005 | */ | |
2006 | command = sbp2util_allocate_command_orb(scsi_id, SCpnt, done); | |
2007 | if (!command) { | |
a237f35f | 2008 | return -EIO; |
1da177e4 LT |
2009 | } |
2010 | ||
1da177e4 LT |
2011 | /* |
2012 | * Now actually fill in the comamnd orb and sbp2 s/g list | |
2013 | */ | |
2014 | sbp2_create_command_orb(scsi_id, command, cmd, SCpnt->use_sg, | |
2015 | request_bufflen, SCpnt->request_buffer, | |
2016 | SCpnt->sc_data_direction); | |
1da177e4 LT |
2017 | |
2018 | sbp2util_packet_dump(&command->command_orb, sizeof(struct sbp2_command_orb), | |
2019 | "sbp2 command orb", command->command_orb_dma); | |
2020 | ||
2021 | /* | |
2022 | * Initialize status fifo | |
2023 | */ | |
2024 | memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); | |
2025 | ||
2026 | /* | |
2027 | * Link up the orb, and ring the doorbell if needed | |
2028 | */ | |
2029 | sbp2_link_orb_command(scsi_id, command); | |
2030 | ||
a237f35f | 2031 | return 0; |
1da177e4 LT |
2032 | } |
2033 | ||
1da177e4 LT |
2034 | /* |
2035 | * Translates SBP-2 status into SCSI sense data for check conditions | |
2036 | */ | |
2037 | static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, unchar *sense_data) | |
2038 | { | |
d024ebc6 | 2039 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
2040 | |
2041 | /* | |
2042 | * Ok, it's pretty ugly... ;-) | |
2043 | */ | |
2044 | sense_data[0] = 0x70; | |
2045 | sense_data[1] = 0x0; | |
2046 | sense_data[2] = sbp2_status[9]; | |
2047 | sense_data[3] = sbp2_status[12]; | |
2048 | sense_data[4] = sbp2_status[13]; | |
2049 | sense_data[5] = sbp2_status[14]; | |
2050 | sense_data[6] = sbp2_status[15]; | |
2051 | sense_data[7] = 10; | |
2052 | sense_data[8] = sbp2_status[16]; | |
2053 | sense_data[9] = sbp2_status[17]; | |
2054 | sense_data[10] = sbp2_status[18]; | |
2055 | sense_data[11] = sbp2_status[19]; | |
2056 | sense_data[12] = sbp2_status[10]; | |
2057 | sense_data[13] = sbp2_status[11]; | |
2058 | sense_data[14] = sbp2_status[20]; | |
2059 | sense_data[15] = sbp2_status[21]; | |
2060 | ||
a237f35f | 2061 | return sbp2_status[8] & 0x3f; /* return scsi status */ |
1da177e4 LT |
2062 | } |
2063 | ||
2064 | /* | |
2065 | * This function is called after a command is completed, in order to do any necessary SBP-2 | |
2066 | * response data translations for the SCSI stack | |
2067 | */ | |
a237f35f | 2068 | static void sbp2_check_sbp2_response(struct scsi_id_instance_data *scsi_id, |
1da177e4 LT |
2069 | struct scsi_cmnd *SCpnt) |
2070 | { | |
2071 | u8 *scsi_buf = SCpnt->request_buffer; | |
1da177e4 | 2072 | |
d024ebc6 | 2073 | SBP2_DEBUG_ENTER(); |
1da177e4 | 2074 | |
e30809fd | 2075 | if (SCpnt->cmnd[0] == INQUIRY && (SCpnt->cmnd[1] & 3) == 0) { |
a237f35f SR |
2076 | /* |
2077 | * Make sure data length is ok. Minimum length is 36 bytes | |
2078 | */ | |
2079 | if (scsi_buf[4] == 0) { | |
2080 | scsi_buf[4] = 36 - 5; | |
2081 | } | |
1da177e4 | 2082 | |
a237f35f SR |
2083 | /* |
2084 | * Fix ansi revision and response data format | |
2085 | */ | |
2086 | scsi_buf[2] |= 2; | |
2087 | scsi_buf[3] = (scsi_buf[3] & 0xf0) | 2; | |
1da177e4 | 2088 | } |
1da177e4 LT |
2089 | } |
2090 | ||
2091 | /* | |
2092 | * This function deals with status writes from the SBP-2 device | |
2093 | */ | |
2094 | static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, int destid, | |
2095 | quadlet_t *data, u64 addr, size_t length, u16 fl) | |
2096 | { | |
2097 | struct sbp2scsi_host_info *hi; | |
2098 | struct scsi_id_instance_data *scsi_id = NULL, *scsi_id_tmp; | |
1da177e4 LT |
2099 | struct scsi_cmnd *SCpnt = NULL; |
2100 | u32 scsi_status = SBP2_SCSI_STATUS_GOOD; | |
2101 | struct sbp2_command_info *command; | |
79456197 | 2102 | unsigned long flags; |
1da177e4 | 2103 | |
d024ebc6 | 2104 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
2105 | |
2106 | sbp2util_packet_dump(data, length, "sbp2 status write by device", (u32)addr); | |
2107 | ||
2108 | if (!host) { | |
2109 | SBP2_ERR("host is NULL - this is bad!"); | |
a237f35f | 2110 | return RCODE_ADDRESS_ERROR; |
1da177e4 LT |
2111 | } |
2112 | ||
2113 | hi = hpsb_get_hostinfo(&sbp2_highlevel, host); | |
2114 | ||
2115 | if (!hi) { | |
2116 | SBP2_ERR("host info is NULL - this is bad!"); | |
a237f35f | 2117 | return RCODE_ADDRESS_ERROR; |
1da177e4 LT |
2118 | } |
2119 | ||
2120 | /* | |
35bdddb8 SR |
2121 | * Find our scsi_id structure by looking at the status fifo address |
2122 | * written to by the sbp2 device. | |
1da177e4 | 2123 | */ |
1da177e4 | 2124 | list_for_each_entry(scsi_id_tmp, &hi->scsi_ids, scsi_list) { |
35bdddb8 SR |
2125 | if (scsi_id_tmp->ne->nodeid == nodeid && |
2126 | scsi_id_tmp->status_fifo_addr == addr) { | |
1da177e4 LT |
2127 | scsi_id = scsi_id_tmp; |
2128 | break; | |
2129 | } | |
2130 | } | |
2131 | ||
2132 | if (!scsi_id) { | |
2133 | SBP2_ERR("scsi_id is NULL - device is gone?"); | |
a237f35f | 2134 | return RCODE_ADDRESS_ERROR; |
1da177e4 LT |
2135 | } |
2136 | ||
2137 | /* | |
2138 | * Put response into scsi_id status fifo... | |
2139 | */ | |
2140 | memcpy(&scsi_id->status_block, data, length); | |
2141 | ||
2142 | /* | |
2143 | * Byte swap first two quadlets (8 bytes) of status for processing | |
2144 | */ | |
2145 | sbp2util_be32_to_cpu_buffer(&scsi_id->status_block, 8); | |
2146 | ||
2147 | /* | |
2148 | * Handle command ORB status here if necessary. First, need to match status with command. | |
2149 | */ | |
2150 | command = sbp2util_find_command_for_orb(scsi_id, scsi_id->status_block.ORB_offset_lo); | |
2151 | if (command) { | |
2152 | ||
2153 | SBP2_DEBUG("Found status for command ORB"); | |
2154 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma, | |
2155 | sizeof(struct sbp2_command_orb), | |
2156 | PCI_DMA_BIDIRECTIONAL); | |
2157 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma, | |
2158 | sizeof(command->scatter_gather_element), | |
2159 | PCI_DMA_BIDIRECTIONAL); | |
2160 | ||
2161 | SBP2_ORB_DEBUG("matched command orb %p", &command->command_orb); | |
2162 | outstanding_orb_decr; | |
2163 | ||
2164 | /* | |
2165 | * Matched status with command, now grab scsi command pointers and check status | |
2166 | */ | |
2167 | SCpnt = command->Current_SCpnt; | |
24c7cd06 | 2168 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 | 2169 | sbp2util_mark_command_completed(scsi_id, command); |
24c7cd06 | 2170 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2171 | |
2172 | if (SCpnt) { | |
2173 | ||
2174 | /* | |
2175 | * See if the target stored any scsi status information | |
2176 | */ | |
2177 | if (STATUS_GET_LENGTH(scsi_id->status_block.ORB_offset_hi_misc) > 1) { | |
2178 | /* | |
2179 | * Translate SBP-2 status to SCSI sense data | |
2180 | */ | |
2181 | SBP2_DEBUG("CHECK CONDITION"); | |
2182 | scsi_status = sbp2_status_to_sense_data((unchar *)&scsi_id->status_block, SCpnt->sense_buffer); | |
2183 | } | |
2184 | ||
2185 | /* | |
2186 | * Check to see if the dead bit is set. If so, we'll have to initiate | |
2187 | * a fetch agent reset. | |
2188 | */ | |
2189 | if (STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc)) { | |
2190 | ||
2191 | /* | |
2192 | * Initiate a fetch agent reset. | |
2193 | */ | |
2194 | SBP2_DEBUG("Dead bit set - initiating fetch agent reset"); | |
2195 | sbp2_agent_reset(scsi_id, 0); | |
2196 | } | |
2197 | ||
2198 | SBP2_ORB_DEBUG("completing command orb %p", &command->command_orb); | |
2199 | } | |
2200 | ||
2201 | /* | |
2202 | * Check here to see if there are no commands in-use. If there are none, we can | |
2203 | * null out last orb so that next time around we write directly to the orb pointer... | |
2204 | * Quick start saves one 1394 bus transaction. | |
2205 | */ | |
79456197 | 2206 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2207 | if (list_empty(&scsi_id->sbp2_command_orb_inuse)) { |
2208 | scsi_id->last_orb = NULL; | |
2209 | } | |
79456197 | 2210 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2211 | |
2212 | } else { | |
2213 | ||
2214 | /* | |
2215 | * It's probably a login/logout/reconnect status. | |
2216 | */ | |
2217 | if ((scsi_id->login_orb_dma == scsi_id->status_block.ORB_offset_lo) || | |
2218 | (scsi_id->query_logins_orb_dma == scsi_id->status_block.ORB_offset_lo) || | |
2219 | (scsi_id->reconnect_orb_dma == scsi_id->status_block.ORB_offset_lo) || | |
2220 | (scsi_id->logout_orb_dma == scsi_id->status_block.ORB_offset_lo)) { | |
2221 | atomic_set(&scsi_id->sbp2_login_complete, 1); | |
2222 | } | |
2223 | } | |
2224 | ||
2225 | if (SCpnt) { | |
2226 | ||
2227 | /* Complete the SCSI command. */ | |
2228 | SBP2_DEBUG("Completing SCSI command"); | |
2229 | sbp2scsi_complete_command(scsi_id, scsi_status, SCpnt, | |
2230 | command->Current_done); | |
2231 | SBP2_ORB_DEBUG("command orb completed"); | |
2232 | } | |
2233 | ||
a237f35f | 2234 | return RCODE_COMPLETE; |
1da177e4 LT |
2235 | } |
2236 | ||
1da177e4 LT |
2237 | /************************************** |
2238 | * SCSI interface related section | |
2239 | **************************************/ | |
2240 | ||
2241 | /* | |
2242 | * This routine is the main request entry routine for doing I/O. It is | |
2243 | * called from the scsi stack directly. | |
2244 | */ | |
2245 | static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt, | |
2246 | void (*done)(struct scsi_cmnd *)) | |
2247 | { | |
2248 | struct scsi_id_instance_data *scsi_id = | |
2249 | (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; | |
2250 | struct sbp2scsi_host_info *hi; | |
abd559b1 | 2251 | int result = DID_NO_CONNECT << 16; |
1da177e4 | 2252 | |
d024ebc6 SR |
2253 | SBP2_DEBUG_ENTER(); |
2254 | #if (CONFIG_IEEE1394_SBP2_DEBUG >= 2) || defined(CONFIG_IEEE1394_SBP2_PACKET_DUMP) | |
2255 | scsi_print_command(SCpnt); | |
2256 | #endif | |
1da177e4 | 2257 | |
abd559b1 JM |
2258 | if (!sbp2util_node_is_available(scsi_id)) |
2259 | goto done; | |
1da177e4 LT |
2260 | |
2261 | hi = scsi_id->hi; | |
2262 | ||
2263 | if (!hi) { | |
2264 | SBP2_ERR("sbp2scsi_host_info is NULL - this is bad!"); | |
abd559b1 | 2265 | goto done; |
1da177e4 LT |
2266 | } |
2267 | ||
2268 | /* | |
2269 | * Until we handle multiple luns, just return selection time-out | |
2270 | * to any IO directed at non-zero LUNs | |
2271 | */ | |
abd559b1 JM |
2272 | if (SCpnt->device->lun) |
2273 | goto done; | |
1da177e4 LT |
2274 | |
2275 | /* | |
2276 | * Check for request sense command, and handle it here | |
2277 | * (autorequest sense) | |
2278 | */ | |
2279 | if (SCpnt->cmnd[0] == REQUEST_SENSE) { | |
2280 | SBP2_DEBUG("REQUEST_SENSE"); | |
2281 | memcpy(SCpnt->request_buffer, SCpnt->sense_buffer, SCpnt->request_bufflen); | |
2282 | memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer)); | |
2283 | sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_GOOD, SCpnt, done); | |
abd559b1 | 2284 | return 0; |
1da177e4 LT |
2285 | } |
2286 | ||
2287 | /* | |
2288 | * Check to see if we are in the middle of a bus reset. | |
2289 | */ | |
2290 | if (!hpsb_node_entry_valid(scsi_id->ne)) { | |
2291 | SBP2_ERR("Bus reset in progress - rejecting command"); | |
abd559b1 JM |
2292 | result = DID_BUS_BUSY << 16; |
2293 | goto done; | |
1da177e4 LT |
2294 | } |
2295 | ||
43863eba SR |
2296 | /* |
2297 | * Bidirectional commands are not yet implemented, | |
2298 | * and unknown transfer direction not handled. | |
2299 | */ | |
2300 | if (SCpnt->sc_data_direction == DMA_BIDIRECTIONAL) { | |
2301 | SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command"); | |
2302 | result = DID_ERROR << 16; | |
2303 | goto done; | |
2304 | } | |
2305 | ||
1da177e4 LT |
2306 | /* |
2307 | * Try and send our SCSI command | |
2308 | */ | |
2309 | if (sbp2_send_command(scsi_id, SCpnt, done)) { | |
2310 | SBP2_ERR("Error sending SCSI command"); | |
2311 | sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_SELECTION_TIMEOUT, | |
2312 | SCpnt, done); | |
2313 | } | |
abd559b1 | 2314 | return 0; |
1da177e4 | 2315 | |
abd559b1 JM |
2316 | done: |
2317 | SCpnt->result = result; | |
2318 | done(SCpnt); | |
2319 | return 0; | |
1da177e4 LT |
2320 | } |
2321 | ||
2322 | /* | |
2323 | * This function is called in order to complete all outstanding SBP-2 | |
2324 | * commands (in case of resets, etc.). | |
2325 | */ | |
2326 | static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id, | |
2327 | u32 status) | |
2328 | { | |
2329 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
2330 | struct list_head *lh; | |
2331 | struct sbp2_command_info *command; | |
79456197 | 2332 | unsigned long flags; |
1da177e4 | 2333 | |
d024ebc6 | 2334 | SBP2_DEBUG_ENTER(); |
1da177e4 | 2335 | |
79456197 | 2336 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2337 | while (!list_empty(&scsi_id->sbp2_command_orb_inuse)) { |
2338 | SBP2_DEBUG("Found pending command to complete"); | |
2339 | lh = scsi_id->sbp2_command_orb_inuse.next; | |
2340 | command = list_entry(lh, struct sbp2_command_info, list); | |
2341 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma, | |
2342 | sizeof(struct sbp2_command_orb), | |
2343 | PCI_DMA_BIDIRECTIONAL); | |
2344 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma, | |
2345 | sizeof(command->scatter_gather_element), | |
2346 | PCI_DMA_BIDIRECTIONAL); | |
2347 | sbp2util_mark_command_completed(scsi_id, command); | |
2348 | if (command->Current_SCpnt) { | |
2349 | command->Current_SCpnt->result = status << 16; | |
2350 | command->Current_done(command->Current_SCpnt); | |
2351 | } | |
2352 | } | |
79456197 | 2353 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2354 | |
2355 | return; | |
2356 | } | |
2357 | ||
2358 | /* | |
2359 | * This function is called in order to complete a regular SBP-2 command. | |
2360 | * | |
2361 | * This can be called in interrupt context. | |
2362 | */ | |
2363 | static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id, | |
2364 | u32 scsi_status, struct scsi_cmnd *SCpnt, | |
2365 | void (*done)(struct scsi_cmnd *)) | |
2366 | { | |
d024ebc6 | 2367 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
2368 | |
2369 | /* | |
2370 | * Sanity | |
2371 | */ | |
2372 | if (!SCpnt) { | |
2373 | SBP2_ERR("SCpnt is NULL"); | |
2374 | return; | |
2375 | } | |
2376 | ||
2377 | /* | |
2378 | * If a bus reset is in progress and there was an error, don't | |
2379 | * complete the command, just let it get retried at the end of the | |
2380 | * bus reset. | |
2381 | */ | |
a237f35f SR |
2382 | if (!hpsb_node_entry_valid(scsi_id->ne) |
2383 | && (scsi_status != SBP2_SCSI_STATUS_GOOD)) { | |
1da177e4 LT |
2384 | SBP2_ERR("Bus reset in progress - retry command later"); |
2385 | return; | |
2386 | } | |
a237f35f | 2387 | |
1da177e4 LT |
2388 | /* |
2389 | * Switch on scsi status | |
2390 | */ | |
2391 | switch (scsi_status) { | |
a237f35f | 2392 | case SBP2_SCSI_STATUS_GOOD: |
8f0525ff | 2393 | SCpnt->result = DID_OK << 16; |
a237f35f | 2394 | break; |
1da177e4 | 2395 | |
a237f35f SR |
2396 | case SBP2_SCSI_STATUS_BUSY: |
2397 | SBP2_ERR("SBP2_SCSI_STATUS_BUSY"); | |
2398 | SCpnt->result = DID_BUS_BUSY << 16; | |
2399 | break; | |
1da177e4 | 2400 | |
a237f35f SR |
2401 | case SBP2_SCSI_STATUS_CHECK_CONDITION: |
2402 | SBP2_DEBUG("SBP2_SCSI_STATUS_CHECK_CONDITION"); | |
8f0525ff | 2403 | SCpnt->result = CHECK_CONDITION << 1 | DID_OK << 16; |
1da177e4 | 2404 | #if CONFIG_IEEE1394_SBP2_DEBUG >= 1 |
a237f35f | 2405 | scsi_print_command(SCpnt); |
d024ebc6 | 2406 | scsi_print_sense(SBP2_DEVICE_NAME, SCpnt); |
1da177e4 | 2407 | #endif |
a237f35f | 2408 | break; |
1da177e4 | 2409 | |
a237f35f SR |
2410 | case SBP2_SCSI_STATUS_SELECTION_TIMEOUT: |
2411 | SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT"); | |
2412 | SCpnt->result = DID_NO_CONNECT << 16; | |
2413 | scsi_print_command(SCpnt); | |
2414 | break; | |
1da177e4 | 2415 | |
a237f35f SR |
2416 | case SBP2_SCSI_STATUS_CONDITION_MET: |
2417 | case SBP2_SCSI_STATUS_RESERVATION_CONFLICT: | |
2418 | case SBP2_SCSI_STATUS_COMMAND_TERMINATED: | |
2419 | SBP2_ERR("Bad SCSI status = %x", scsi_status); | |
2420 | SCpnt->result = DID_ERROR << 16; | |
2421 | scsi_print_command(SCpnt); | |
2422 | break; | |
1da177e4 | 2423 | |
a237f35f SR |
2424 | default: |
2425 | SBP2_ERR("Unsupported SCSI status = %x", scsi_status); | |
2426 | SCpnt->result = DID_ERROR << 16; | |
1da177e4 LT |
2427 | } |
2428 | ||
2429 | /* | |
2430 | * Take care of any sbp2 response data mucking here (RBC stuff, etc.) | |
2431 | */ | |
8f0525ff | 2432 | if (SCpnt->result == DID_OK << 16) { |
1da177e4 LT |
2433 | sbp2_check_sbp2_response(scsi_id, SCpnt); |
2434 | } | |
2435 | ||
2436 | /* | |
2437 | * If a bus reset is in progress and there was an error, complete | |
2438 | * the command as busy so that it will get retried. | |
2439 | */ | |
a237f35f SR |
2440 | if (!hpsb_node_entry_valid(scsi_id->ne) |
2441 | && (scsi_status != SBP2_SCSI_STATUS_GOOD)) { | |
1da177e4 LT |
2442 | SBP2_ERR("Completing command with busy (bus reset)"); |
2443 | SCpnt->result = DID_BUS_BUSY << 16; | |
2444 | } | |
2445 | ||
2446 | /* | |
2447 | * If a unit attention occurs, return busy status so it gets | |
2448 | * retried... it could have happened because of a 1394 bus reset | |
2449 | * or hot-plug... | |
8f0525ff SR |
2450 | * XXX DID_BUS_BUSY is actually a bad idea because it will defy |
2451 | * the scsi layer's retry logic. | |
1da177e4 LT |
2452 | */ |
2453 | #if 0 | |
2454 | if ((scsi_status == SBP2_SCSI_STATUS_CHECK_CONDITION) && | |
2455 | (SCpnt->sense_buffer[2] == UNIT_ATTENTION)) { | |
2456 | SBP2_DEBUG("UNIT ATTENTION - return busy"); | |
2457 | SCpnt->result = DID_BUS_BUSY << 16; | |
2458 | } | |
2459 | #endif | |
2460 | ||
2461 | /* | |
2462 | * Tell scsi stack that we're done with this command | |
2463 | */ | |
a237f35f | 2464 | done(SCpnt); |
1da177e4 LT |
2465 | } |
2466 | ||
abd559b1 | 2467 | static int sbp2scsi_slave_alloc(struct scsi_device *sdev) |
1da177e4 | 2468 | { |
a80614d1 SR |
2469 | struct scsi_id_instance_data *scsi_id = |
2470 | (struct scsi_id_instance_data *)sdev->host->hostdata[0]; | |
2471 | ||
2472 | scsi_id->sdev = sdev; | |
2473 | ||
24d3bf88 | 2474 | if (scsi_id->workarounds & SBP2_WORKAROUND_INQUIRY_36) |
a80614d1 | 2475 | sdev->inquiry_len = 36; |
abd559b1 JM |
2476 | return 0; |
2477 | } | |
2478 | ||
abd559b1 JM |
2479 | static int sbp2scsi_slave_configure(struct scsi_device *sdev) |
2480 | { | |
24d3bf88 SR |
2481 | struct scsi_id_instance_data *scsi_id = |
2482 | (struct scsi_id_instance_data *)sdev->host->hostdata[0]; | |
2483 | ||
abd559b1 | 2484 | blk_queue_dma_alignment(sdev->request_queue, (512 - 1)); |
365c786f BC |
2485 | sdev->use_10_for_rw = 1; |
2486 | sdev->use_10_for_ms = 1; | |
24d3bf88 SR |
2487 | |
2488 | if (sdev->type == TYPE_DISK && | |
2489 | scsi_id->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) | |
2490 | sdev->skip_ms_page_8 = 1; | |
1da177e4 LT |
2491 | return 0; |
2492 | } | |
2493 | ||
abd559b1 JM |
2494 | static void sbp2scsi_slave_destroy(struct scsi_device *sdev) |
2495 | { | |
2496 | ((struct scsi_id_instance_data *)sdev->host->hostdata[0])->sdev = NULL; | |
2497 | return; | |
2498 | } | |
2499 | ||
1da177e4 LT |
2500 | /* |
2501 | * Called by scsi stack when something has really gone wrong. Usually | |
2502 | * called when a command has timed-out for some reason. | |
2503 | */ | |
2504 | static int sbp2scsi_abort(struct scsi_cmnd *SCpnt) | |
2505 | { | |
2506 | struct scsi_id_instance_data *scsi_id = | |
2507 | (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; | |
2508 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
2509 | struct sbp2_command_info *command; | |
24c7cd06 | 2510 | unsigned long flags; |
1da177e4 LT |
2511 | |
2512 | SBP2_ERR("aborting sbp2 command"); | |
2513 | scsi_print_command(SCpnt); | |
2514 | ||
abd559b1 | 2515 | if (sbp2util_node_is_available(scsi_id)) { |
1da177e4 LT |
2516 | |
2517 | /* | |
2518 | * Right now, just return any matching command structures | |
2519 | * to the free pool. | |
2520 | */ | |
24c7cd06 | 2521 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2522 | command = sbp2util_find_command_for_SCpnt(scsi_id, SCpnt); |
2523 | if (command) { | |
2524 | SBP2_DEBUG("Found command to abort"); | |
2525 | pci_dma_sync_single_for_cpu(hi->host->pdev, | |
2526 | command->command_orb_dma, | |
2527 | sizeof(struct sbp2_command_orb), | |
2528 | PCI_DMA_BIDIRECTIONAL); | |
2529 | pci_dma_sync_single_for_cpu(hi->host->pdev, | |
2530 | command->sge_dma, | |
2531 | sizeof(command->scatter_gather_element), | |
2532 | PCI_DMA_BIDIRECTIONAL); | |
2533 | sbp2util_mark_command_completed(scsi_id, command); | |
2534 | if (command->Current_SCpnt) { | |
2535 | command->Current_SCpnt->result = DID_ABORT << 16; | |
2536 | command->Current_done(command->Current_SCpnt); | |
2537 | } | |
2538 | } | |
24c7cd06 | 2539 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2540 | |
2541 | /* | |
2542 | * Initiate a fetch agent reset. | |
2543 | */ | |
2544 | sbp2_agent_reset(scsi_id, 0); | |
2545 | sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY); | |
2546 | } | |
2547 | ||
a237f35f | 2548 | return SUCCESS; |
1da177e4 LT |
2549 | } |
2550 | ||
2551 | /* | |
2552 | * Called by scsi stack when something has really gone wrong. | |
2553 | */ | |
abd559b1 | 2554 | static int sbp2scsi_reset(struct scsi_cmnd *SCpnt) |
1da177e4 LT |
2555 | { |
2556 | struct scsi_id_instance_data *scsi_id = | |
2557 | (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; | |
2558 | ||
2559 | SBP2_ERR("reset requested"); | |
2560 | ||
abd559b1 | 2561 | if (sbp2util_node_is_available(scsi_id)) { |
1da177e4 LT |
2562 | SBP2_ERR("Generating sbp2 fetch agent reset"); |
2563 | sbp2_agent_reset(scsi_id, 0); | |
2564 | } | |
2565 | ||
abd559b1 | 2566 | return SUCCESS; |
94d0e7b8 JG |
2567 | } |
2568 | ||
a237f35f SR |
2569 | static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev, |
2570 | struct device_attribute *attr, | |
2571 | char *buf) | |
1da177e4 LT |
2572 | { |
2573 | struct scsi_device *sdev; | |
2574 | struct scsi_id_instance_data *scsi_id; | |
2575 | int lun; | |
2576 | ||
2577 | if (!(sdev = to_scsi_device(dev))) | |
2578 | return 0; | |
2579 | ||
2580 | if (!(scsi_id = (struct scsi_id_instance_data *)sdev->host->hostdata[0])) | |
2581 | return 0; | |
2582 | ||
e309fc6d | 2583 | lun = ORB_SET_LUN(scsi_id->sbp2_lun); |
1da177e4 LT |
2584 | |
2585 | return sprintf(buf, "%016Lx:%d:%d\n", (unsigned long long)scsi_id->ne->guid, | |
2586 | scsi_id->ud->id, lun); | |
2587 | } | |
2588 | static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); | |
2589 | ||
2590 | static struct device_attribute *sbp2_sysfs_sdev_attrs[] = { | |
2591 | &dev_attr_ieee1394_id, | |
2592 | NULL | |
2593 | }; | |
2594 | ||
2595 | MODULE_AUTHOR("Ben Collins <bcollins@debian.org>"); | |
2596 | MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver"); | |
2597 | MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME); | |
2598 | MODULE_LICENSE("GPL"); | |
2599 | ||
2600 | /* SCSI host template */ | |
2601 | static struct scsi_host_template scsi_driver_template = { | |
2602 | .module = THIS_MODULE, | |
2603 | .name = "SBP-2 IEEE-1394", | |
2604 | .proc_name = SBP2_DEVICE_NAME, | |
1da177e4 LT |
2605 | .queuecommand = sbp2scsi_queuecommand, |
2606 | .eh_abort_handler = sbp2scsi_abort, | |
2607 | .eh_device_reset_handler = sbp2scsi_reset, | |
abd559b1 | 2608 | .slave_alloc = sbp2scsi_slave_alloc, |
1da177e4 | 2609 | .slave_configure = sbp2scsi_slave_configure, |
abd559b1 | 2610 | .slave_destroy = sbp2scsi_slave_destroy, |
1da177e4 LT |
2611 | .this_id = -1, |
2612 | .sg_tablesize = SG_ALL, | |
2613 | .use_clustering = ENABLE_CLUSTERING, | |
2614 | .cmd_per_lun = SBP2_MAX_CMDS, | |
2615 | .can_queue = SBP2_MAX_CMDS, | |
2616 | .emulated = 1, | |
2617 | .sdev_attrs = sbp2_sysfs_sdev_attrs, | |
2618 | }; | |
2619 | ||
2620 | static int sbp2_module_init(void) | |
2621 | { | |
2622 | int ret; | |
2623 | ||
d024ebc6 | 2624 | SBP2_DEBUG_ENTER(); |
1da177e4 | 2625 | |
1da177e4 LT |
2626 | /* Module load debug option to force one command at a time (serializing I/O) */ |
2627 | if (serialize_io) { | |
2bab359a JM |
2628 | SBP2_INFO("Driver forced to serialize I/O (serialize_io=1)"); |
2629 | SBP2_INFO("Try serialize_io=0 for better performance"); | |
1da177e4 LT |
2630 | scsi_driver_template.can_queue = 1; |
2631 | scsi_driver_template.cmd_per_lun = 1; | |
2632 | } | |
2633 | ||
24d3bf88 SR |
2634 | if (sbp2_default_workarounds & SBP2_WORKAROUND_128K_MAX_TRANS && |
2635 | (max_sectors * 512) > (128 * 1024)) | |
2636 | max_sectors = 128 * 1024 / 512; | |
1da177e4 LT |
2637 | scsi_driver_template.max_sectors = max_sectors; |
2638 | ||
1da177e4 LT |
2639 | /* Register our high level driver with 1394 stack */ |
2640 | hpsb_register_highlevel(&sbp2_highlevel); | |
2641 | ||
2642 | ret = hpsb_register_protocol(&sbp2_driver); | |
2643 | if (ret) { | |
2644 | SBP2_ERR("Failed to register protocol"); | |
2645 | hpsb_unregister_highlevel(&sbp2_highlevel); | |
2646 | return ret; | |
2647 | } | |
2648 | ||
2649 | return 0; | |
2650 | } | |
2651 | ||
2652 | static void __exit sbp2_module_exit(void) | |
2653 | { | |
d024ebc6 | 2654 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
2655 | |
2656 | hpsb_unregister_protocol(&sbp2_driver); | |
2657 | ||
2658 | hpsb_unregister_highlevel(&sbp2_highlevel); | |
2659 | } | |
2660 | ||
2661 | module_init(sbp2_module_init); | |
2662 | module_exit(sbp2_module_exit); |