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1da177e4 LT |
1 | /* |
2 | * sbp2.c - SBP-2 protocol driver for IEEE-1394 | |
3 | * | |
4 | * Copyright (C) 2000 James Goodwin, Filanet Corporation (www.filanet.com) | |
5 | * jamesg@filanet.com (JSG) | |
6 | * | |
7 | * Copyright (C) 2003 Ben Collins <bcollins@debian.org> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software Foundation, | |
21 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
22 | */ | |
23 | ||
24 | /* | |
25 | * Brief Description: | |
26 | * | |
27 | * This driver implements the Serial Bus Protocol 2 (SBP-2) over IEEE-1394 | |
28 | * under Linux. The SBP-2 driver is implemented as an IEEE-1394 high-level | |
29 | * driver. It also registers as a SCSI lower-level driver in order to accept | |
30 | * SCSI commands for transport using SBP-2. | |
31 | * | |
32 | * You may access any attached SBP-2 storage devices as if they were SCSI | |
33 | * devices (e.g. mount /dev/sda1, fdisk, mkfs, etc.). | |
34 | * | |
35 | * Current Issues: | |
36 | * | |
37 | * - Error Handling: SCSI aborts and bus reset requests are handled somewhat | |
38 | * but the code needs additional debugging. | |
39 | */ | |
40 | ||
41 | #include <linux/config.h> | |
42 | #include <linux/kernel.h> | |
43 | #include <linux/list.h> | |
44 | #include <linux/string.h> | |
45 | #include <linux/slab.h> | |
46 | #include <linux/interrupt.h> | |
47 | #include <linux/fs.h> | |
48 | #include <linux/poll.h> | |
49 | #include <linux/module.h> | |
50 | #include <linux/moduleparam.h> | |
51 | #include <linux/types.h> | |
52 | #include <linux/delay.h> | |
53 | #include <linux/sched.h> | |
54 | #include <linux/blkdev.h> | |
55 | #include <linux/smp_lock.h> | |
56 | #include <linux/init.h> | |
57 | #include <linux/pci.h> | |
58 | ||
59 | #include <asm/current.h> | |
60 | #include <asm/uaccess.h> | |
61 | #include <asm/io.h> | |
62 | #include <asm/byteorder.h> | |
63 | #include <asm/atomic.h> | |
64 | #include <asm/system.h> | |
65 | #include <asm/scatterlist.h> | |
66 | ||
67 | #include <scsi/scsi.h> | |
68 | #include <scsi/scsi_cmnd.h> | |
69 | #include <scsi/scsi_dbg.h> | |
70 | #include <scsi/scsi_device.h> | |
71 | #include <scsi/scsi_host.h> | |
72 | ||
73 | #include "csr1212.h" | |
74 | #include "ieee1394.h" | |
75 | #include "ieee1394_types.h" | |
76 | #include "ieee1394_core.h" | |
77 | #include "nodemgr.h" | |
78 | #include "hosts.h" | |
79 | #include "highlevel.h" | |
80 | #include "ieee1394_transactions.h" | |
81 | #include "sbp2.h" | |
82 | ||
1da177e4 LT |
83 | /* |
84 | * Module load parameter definitions | |
85 | */ | |
86 | ||
87 | /* | |
88 | * Change max_speed on module load if you have a bad IEEE-1394 | |
89 | * controller that has trouble running 2KB packets at 400mb. | |
90 | * | |
91 | * NOTE: On certain OHCI parts I have seen short packets on async transmit | |
92 | * (probably due to PCI latency/throughput issues with the part). You can | |
93 | * bump down the speed if you are running into problems. | |
94 | */ | |
95 | static int max_speed = IEEE1394_SPEED_MAX; | |
96 | module_param(max_speed, int, 0644); | |
2bab359a | 97 | MODULE_PARM_DESC(max_speed, "Force max speed (3 = 800mb, 2 = 400mb, 1 = 200mb, 0 = 100mb)"); |
1da177e4 LT |
98 | |
99 | /* | |
100 | * Set serialize_io to 1 if you'd like only one scsi command sent | |
101 | * down to us at a time (debugging). This might be necessary for very | |
102 | * badly behaved sbp2 devices. | |
2bab359a JM |
103 | * |
104 | * TODO: Make this configurable per device. | |
1da177e4 | 105 | */ |
2bab359a | 106 | static int serialize_io = 1; |
1da177e4 | 107 | module_param(serialize_io, int, 0444); |
2bab359a | 108 | MODULE_PARM_DESC(serialize_io, "Serialize I/O coming from scsi drivers (default = 1, faster = 0)"); |
1da177e4 LT |
109 | |
110 | /* | |
111 | * Bump up max_sectors if you'd like to support very large sized | |
112 | * transfers. Please note that some older sbp2 bridge chips are broken for | |
113 | * transfers greater or equal to 128KB. Default is a value of 255 | |
114 | * sectors, or just under 128KB (at 512 byte sector size). I can note that | |
115 | * the Oxsemi sbp2 chipsets have no problems supporting very large | |
116 | * transfer sizes. | |
117 | */ | |
118 | static int max_sectors = SBP2_MAX_SECTORS; | |
119 | module_param(max_sectors, int, 0444); | |
120 | MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported (default = 255)"); | |
121 | ||
122 | /* | |
123 | * Exclusive login to sbp2 device? In most cases, the sbp2 driver should | |
124 | * do an exclusive login, as it's generally unsafe to have two hosts | |
125 | * talking to a single sbp2 device at the same time (filesystem coherency, | |
126 | * etc.). If you're running an sbp2 device that supports multiple logins, | |
127 | * and you're either running read-only filesystems or some sort of special | |
128 | * filesystem supporting multiple hosts (one such filesystem is OpenGFS, | |
129 | * see opengfs.sourceforge.net for more info), then set exclusive_login | |
130 | * to zero. Note: The Oxsemi OXFW911 sbp2 chipset supports up to four | |
131 | * concurrent logins. | |
132 | */ | |
133 | static int exclusive_login = 1; | |
134 | module_param(exclusive_login, int, 0644); | |
135 | MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device (default = 1)"); | |
136 | ||
137 | /* | |
138 | * SCSI inquiry hack for really badly behaved sbp2 devices. Turn this on | |
139 | * if your sbp2 device is not properly handling the SCSI inquiry command. | |
140 | * This hack makes the inquiry look more like a typical MS Windows | |
141 | * inquiry. | |
142 | * | |
143 | * If force_inquiry_hack=1 is required for your device to work, | |
144 | * please submit the logged sbp2_firmware_revision value of this device to | |
145 | * the linux1394-devel mailing list. | |
146 | */ | |
1934b8b6 | 147 | static int force_inquiry_hack; |
1da177e4 LT |
148 | module_param(force_inquiry_hack, int, 0444); |
149 | MODULE_PARM_DESC(force_inquiry_hack, "Force SCSI inquiry hack (default = 0)"); | |
150 | ||
1da177e4 LT |
151 | /* |
152 | * Export information about protocols/devices supported by this driver. | |
153 | */ | |
154 | static struct ieee1394_device_id sbp2_id_table[] = { | |
155 | { | |
a237f35f SR |
156 | .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION, |
157 | .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff, | |
158 | .version = SBP2_SW_VERSION_ENTRY & 0xffffff}, | |
159 | {} | |
1da177e4 LT |
160 | }; |
161 | ||
162 | MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); | |
163 | ||
164 | /* | |
165 | * Debug levels, configured via kernel config, or enable here. | |
166 | */ | |
167 | ||
44456d37 | 168 | #define CONFIG_IEEE1394_SBP2_DEBUG 0 |
1da177e4 LT |
169 | /* #define CONFIG_IEEE1394_SBP2_DEBUG_ORBS */ |
170 | /* #define CONFIG_IEEE1394_SBP2_DEBUG_DMA */ | |
171 | /* #define CONFIG_IEEE1394_SBP2_DEBUG 1 */ | |
172 | /* #define CONFIG_IEEE1394_SBP2_DEBUG 2 */ | |
173 | /* #define CONFIG_IEEE1394_SBP2_PACKET_DUMP */ | |
174 | ||
175 | #ifdef CONFIG_IEEE1394_SBP2_DEBUG_ORBS | |
176 | #define SBP2_ORB_DEBUG(fmt, args...) HPSB_ERR("sbp2(%s): "fmt, __FUNCTION__, ## args) | |
177 | static u32 global_outstanding_command_orbs = 0; | |
178 | #define outstanding_orb_incr global_outstanding_command_orbs++ | |
179 | #define outstanding_orb_decr global_outstanding_command_orbs-- | |
180 | #else | |
181 | #define SBP2_ORB_DEBUG(fmt, args...) | |
182 | #define outstanding_orb_incr | |
183 | #define outstanding_orb_decr | |
184 | #endif | |
185 | ||
186 | #ifdef CONFIG_IEEE1394_SBP2_DEBUG_DMA | |
187 | #define SBP2_DMA_ALLOC(fmt, args...) \ | |
188 | HPSB_ERR("sbp2(%s)alloc(%d): "fmt, __FUNCTION__, \ | |
189 | ++global_outstanding_dmas, ## args) | |
190 | #define SBP2_DMA_FREE(fmt, args...) \ | |
191 | HPSB_ERR("sbp2(%s)free(%d): "fmt, __FUNCTION__, \ | |
192 | --global_outstanding_dmas, ## args) | |
193 | static u32 global_outstanding_dmas = 0; | |
194 | #else | |
195 | #define SBP2_DMA_ALLOC(fmt, args...) | |
196 | #define SBP2_DMA_FREE(fmt, args...) | |
197 | #endif | |
198 | ||
199 | #if CONFIG_IEEE1394_SBP2_DEBUG >= 2 | |
200 | #define SBP2_DEBUG(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
201 | #define SBP2_INFO(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
202 | #define SBP2_NOTICE(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
203 | #define SBP2_WARN(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
204 | #elif CONFIG_IEEE1394_SBP2_DEBUG == 1 | |
205 | #define SBP2_DEBUG(fmt, args...) HPSB_DEBUG("sbp2: "fmt, ## args) | |
206 | #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args) | |
207 | #define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args) | |
208 | #define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args) | |
209 | #else | |
210 | #define SBP2_DEBUG(fmt, args...) | |
211 | #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args) | |
212 | #define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args) | |
213 | #define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args) | |
214 | #endif | |
215 | ||
216 | #define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
217 | ||
1da177e4 LT |
218 | /* |
219 | * Globals | |
220 | */ | |
221 | ||
222 | static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id, | |
223 | u32 status); | |
224 | ||
225 | static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id, | |
226 | u32 scsi_status, struct scsi_cmnd *SCpnt, | |
227 | void (*done)(struct scsi_cmnd *)); | |
228 | ||
229 | static struct scsi_host_template scsi_driver_template; | |
230 | ||
231 | static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC }; | |
232 | ||
233 | static void sbp2_host_reset(struct hpsb_host *host); | |
234 | ||
235 | static int sbp2_probe(struct device *dev); | |
236 | static int sbp2_remove(struct device *dev); | |
237 | static int sbp2_update(struct unit_directory *ud); | |
238 | ||
239 | static struct hpsb_highlevel sbp2_highlevel = { | |
240 | .name = SBP2_DEVICE_NAME, | |
241 | .host_reset = sbp2_host_reset, | |
242 | }; | |
243 | ||
244 | static struct hpsb_address_ops sbp2_ops = { | |
245 | .write = sbp2_handle_status_write | |
246 | }; | |
247 | ||
248 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA | |
249 | static struct hpsb_address_ops sbp2_physdma_ops = { | |
a237f35f SR |
250 | .read = sbp2_handle_physdma_read, |
251 | .write = sbp2_handle_physdma_write, | |
1da177e4 LT |
252 | }; |
253 | #endif | |
254 | ||
255 | static struct hpsb_protocol_driver sbp2_driver = { | |
256 | .name = "SBP2 Driver", | |
257 | .id_table = sbp2_id_table, | |
258 | .update = sbp2_update, | |
259 | .driver = { | |
260 | .name = SBP2_DEVICE_NAME, | |
261 | .bus = &ieee1394_bus_type, | |
262 | .probe = sbp2_probe, | |
263 | .remove = sbp2_remove, | |
264 | }, | |
265 | }; | |
266 | ||
267 | ||
268 | /* List of device firmware's that require a forced 36 byte inquiry. */ | |
269 | static u32 sbp2_broken_inquiry_list[] = { | |
270 | 0x00002800, /* Stefan Richter <richtest@bauwesen.tu-cottbus.de> */ | |
271 | /* DViCO Momobay CX-1 */ | |
272 | 0x00000200 /* Andreas Plesch <plesch@fas.harvard.edu> */ | |
273 | /* QPS Fire DVDBurner */ | |
274 | }; | |
275 | ||
276 | #define NUM_BROKEN_INQUIRY_DEVS \ | |
277 | (sizeof(sbp2_broken_inquiry_list)/sizeof(*sbp2_broken_inquiry_list)) | |
278 | ||
279 | /************************************** | |
280 | * General utility functions | |
281 | **************************************/ | |
282 | ||
1da177e4 LT |
283 | #ifndef __BIG_ENDIAN |
284 | /* | |
285 | * Converts a buffer from be32 to cpu byte ordering. Length is in bytes. | |
286 | */ | |
287 | static __inline__ void sbp2util_be32_to_cpu_buffer(void *buffer, int length) | |
288 | { | |
289 | u32 *temp = buffer; | |
290 | ||
291 | for (length = (length >> 2); length--; ) | |
292 | temp[length] = be32_to_cpu(temp[length]); | |
293 | ||
294 | return; | |
295 | } | |
296 | ||
297 | /* | |
298 | * Converts a buffer from cpu to be32 byte ordering. Length is in bytes. | |
299 | */ | |
300 | static __inline__ void sbp2util_cpu_to_be32_buffer(void *buffer, int length) | |
301 | { | |
302 | u32 *temp = buffer; | |
303 | ||
304 | for (length = (length >> 2); length--; ) | |
305 | temp[length] = cpu_to_be32(temp[length]); | |
306 | ||
307 | return; | |
308 | } | |
309 | #else /* BIG_ENDIAN */ | |
310 | /* Why waste the cpu cycles? */ | |
311 | #define sbp2util_be32_to_cpu_buffer(x,y) | |
312 | #define sbp2util_cpu_to_be32_buffer(x,y) | |
313 | #endif | |
314 | ||
315 | #ifdef CONFIG_IEEE1394_SBP2_PACKET_DUMP | |
316 | /* | |
317 | * Debug packet dump routine. Length is in bytes. | |
318 | */ | |
a237f35f SR |
319 | static void sbp2util_packet_dump(void *buffer, int length, char *dump_name, |
320 | u32 dump_phys_addr) | |
1da177e4 LT |
321 | { |
322 | int i; | |
323 | unsigned char *dump = buffer; | |
324 | ||
325 | if (!dump || !length || !dump_name) | |
326 | return; | |
327 | ||
328 | if (dump_phys_addr) | |
329 | printk("[%s, 0x%x]", dump_name, dump_phys_addr); | |
330 | else | |
331 | printk("[%s]", dump_name); | |
332 | for (i = 0; i < length; i++) { | |
333 | if (i > 0x3f) { | |
334 | printk("\n ..."); | |
335 | break; | |
336 | } | |
337 | if ((i & 0x3) == 0) | |
338 | printk(" "); | |
339 | if ((i & 0xf) == 0) | |
340 | printk("\n "); | |
a237f35f | 341 | printk("%02x ", (int)dump[i]); |
1da177e4 LT |
342 | } |
343 | printk("\n"); | |
344 | ||
345 | return; | |
346 | } | |
347 | #else | |
348 | #define sbp2util_packet_dump(w,x,y,z) | |
349 | #endif | |
350 | ||
351 | /* | |
352 | * Goofy routine that basically does a down_timeout function. | |
353 | */ | |
354 | static int sbp2util_down_timeout(atomic_t *done, int timeout) | |
355 | { | |
356 | int i; | |
357 | ||
358 | for (i = timeout; (i > 0 && atomic_read(done) == 0); i-= HZ/10) { | |
359 | if (msleep_interruptible(100)) /* 100ms */ | |
a237f35f | 360 | return 1; |
1da177e4 | 361 | } |
a237f35f | 362 | return (i > 0) ? 0 : 1; |
1da177e4 LT |
363 | } |
364 | ||
365 | /* Free's an allocated packet */ | |
366 | static void sbp2_free_packet(struct hpsb_packet *packet) | |
367 | { | |
368 | hpsb_free_tlabel(packet); | |
369 | hpsb_free_packet(packet); | |
370 | } | |
371 | ||
372 | /* This is much like hpsb_node_write(), except it ignores the response | |
373 | * subaction and returns immediately. Can be used from interrupts. | |
374 | */ | |
375 | static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr, | |
a237f35f | 376 | quadlet_t *buffer, size_t length) |
1da177e4 LT |
377 | { |
378 | struct hpsb_packet *packet; | |
379 | ||
380 | packet = hpsb_make_writepacket(ne->host, ne->nodeid, | |
381 | addr, buffer, length); | |
a237f35f SR |
382 | if (!packet) |
383 | return -ENOMEM; | |
1da177e4 | 384 | |
a237f35f SR |
385 | hpsb_set_packet_complete_task(packet, |
386 | (void (*)(void *))sbp2_free_packet, | |
1da177e4 LT |
387 | packet); |
388 | ||
389 | hpsb_node_fill_packet(ne, packet); | |
390 | ||
a237f35f | 391 | if (hpsb_send_packet(packet) < 0) { |
1da177e4 LT |
392 | sbp2_free_packet(packet); |
393 | return -EIO; | |
394 | } | |
395 | ||
396 | return 0; | |
397 | } | |
398 | ||
399 | /* | |
400 | * This function is called to create a pool of command orbs used for | |
401 | * command processing. It is called when a new sbp2 device is detected. | |
402 | */ | |
403 | static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data *scsi_id) | |
404 | { | |
405 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
406 | int i; | |
407 | unsigned long flags, orbs; | |
408 | struct sbp2_command_info *command; | |
409 | ||
410 | orbs = serialize_io ? 2 : SBP2_MAX_CMDS; | |
411 | ||
412 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
413 | for (i = 0; i < orbs; i++) { | |
8551158a | 414 | command = kzalloc(sizeof(*command), GFP_ATOMIC); |
1da177e4 | 415 | if (!command) { |
a237f35f SR |
416 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, |
417 | flags); | |
418 | return -ENOMEM; | |
1da177e4 | 419 | } |
1da177e4 | 420 | command->command_orb_dma = |
a237f35f SR |
421 | pci_map_single(hi->host->pdev, &command->command_orb, |
422 | sizeof(struct sbp2_command_orb), | |
423 | PCI_DMA_BIDIRECTIONAL); | |
1da177e4 LT |
424 | SBP2_DMA_ALLOC("single command orb DMA"); |
425 | command->sge_dma = | |
a237f35f SR |
426 | pci_map_single(hi->host->pdev, |
427 | &command->scatter_gather_element, | |
428 | sizeof(command->scatter_gather_element), | |
429 | PCI_DMA_BIDIRECTIONAL); | |
1da177e4 LT |
430 | SBP2_DMA_ALLOC("scatter_gather_element"); |
431 | INIT_LIST_HEAD(&command->list); | |
432 | list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed); | |
433 | } | |
434 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
435 | return 0; | |
436 | } | |
437 | ||
438 | /* | |
439 | * This function is called to delete a pool of command orbs. | |
440 | */ | |
441 | static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data *scsi_id) | |
442 | { | |
443 | struct hpsb_host *host = scsi_id->hi->host; | |
444 | struct list_head *lh, *next; | |
445 | struct sbp2_command_info *command; | |
446 | unsigned long flags; | |
447 | ||
448 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
449 | if (!list_empty(&scsi_id->sbp2_command_orb_completed)) { | |
450 | list_for_each_safe(lh, next, &scsi_id->sbp2_command_orb_completed) { | |
451 | command = list_entry(lh, struct sbp2_command_info, list); | |
452 | ||
453 | /* Release our generic DMA's */ | |
454 | pci_unmap_single(host->pdev, command->command_orb_dma, | |
455 | sizeof(struct sbp2_command_orb), | |
456 | PCI_DMA_BIDIRECTIONAL); | |
457 | SBP2_DMA_FREE("single command orb DMA"); | |
458 | pci_unmap_single(host->pdev, command->sge_dma, | |
459 | sizeof(command->scatter_gather_element), | |
460 | PCI_DMA_BIDIRECTIONAL); | |
461 | SBP2_DMA_FREE("scatter_gather_element"); | |
462 | ||
463 | kfree(command); | |
464 | } | |
465 | } | |
466 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
467 | return; | |
468 | } | |
469 | ||
470 | /* | |
471 | * This function finds the sbp2_command for a given outstanding command | |
472 | * orb.Only looks at the inuse list. | |
473 | */ | |
474 | static struct sbp2_command_info *sbp2util_find_command_for_orb( | |
475 | struct scsi_id_instance_data *scsi_id, dma_addr_t orb) | |
476 | { | |
477 | struct sbp2_command_info *command; | |
478 | unsigned long flags; | |
479 | ||
480 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
481 | if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) { | |
482 | list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) { | |
483 | if (command->command_orb_dma == orb) { | |
484 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
a237f35f | 485 | return command; |
1da177e4 LT |
486 | } |
487 | } | |
488 | } | |
489 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
490 | ||
491 | SBP2_ORB_DEBUG("could not match command orb %x", (unsigned int)orb); | |
492 | ||
a237f35f | 493 | return NULL; |
1da177e4 LT |
494 | } |
495 | ||
496 | /* | |
497 | * This function finds the sbp2_command for a given outstanding SCpnt. | |
498 | * Only looks at the inuse list. | |
499 | */ | |
500 | static struct sbp2_command_info *sbp2util_find_command_for_SCpnt(struct scsi_id_instance_data *scsi_id, void *SCpnt) | |
501 | { | |
502 | struct sbp2_command_info *command; | |
503 | unsigned long flags; | |
504 | ||
505 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
506 | if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) { | |
507 | list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) { | |
508 | if (command->Current_SCpnt == SCpnt) { | |
509 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
a237f35f | 510 | return command; |
1da177e4 LT |
511 | } |
512 | } | |
513 | } | |
514 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
a237f35f | 515 | return NULL; |
1da177e4 LT |
516 | } |
517 | ||
518 | /* | |
519 | * This function allocates a command orb used to send a scsi command. | |
520 | */ | |
521 | static struct sbp2_command_info *sbp2util_allocate_command_orb( | |
522 | struct scsi_id_instance_data *scsi_id, | |
523 | struct scsi_cmnd *Current_SCpnt, | |
524 | void (*Current_done)(struct scsi_cmnd *)) | |
525 | { | |
526 | struct list_head *lh; | |
527 | struct sbp2_command_info *command = NULL; | |
528 | unsigned long flags; | |
529 | ||
530 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
531 | if (!list_empty(&scsi_id->sbp2_command_orb_completed)) { | |
532 | lh = scsi_id->sbp2_command_orb_completed.next; | |
533 | list_del(lh); | |
534 | command = list_entry(lh, struct sbp2_command_info, list); | |
535 | command->Current_done = Current_done; | |
536 | command->Current_SCpnt = Current_SCpnt; | |
537 | list_add_tail(&command->list, &scsi_id->sbp2_command_orb_inuse); | |
538 | } else { | |
539 | SBP2_ERR("sbp2util_allocate_command_orb - No orbs available!"); | |
540 | } | |
541 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
a237f35f | 542 | return command; |
1da177e4 LT |
543 | } |
544 | ||
545 | /* Free our DMA's */ | |
546 | static void sbp2util_free_command_dma(struct sbp2_command_info *command) | |
547 | { | |
548 | struct scsi_id_instance_data *scsi_id = | |
549 | (struct scsi_id_instance_data *)command->Current_SCpnt->device->host->hostdata[0]; | |
550 | struct hpsb_host *host; | |
551 | ||
552 | if (!scsi_id) { | |
553 | printk(KERN_ERR "%s: scsi_id == NULL\n", __FUNCTION__); | |
554 | return; | |
555 | } | |
556 | ||
557 | host = scsi_id->ud->ne->host; | |
558 | ||
559 | if (command->cmd_dma) { | |
560 | if (command->dma_type == CMD_DMA_SINGLE) { | |
561 | pci_unmap_single(host->pdev, command->cmd_dma, | |
562 | command->dma_size, command->dma_dir); | |
563 | SBP2_DMA_FREE("single bulk"); | |
564 | } else if (command->dma_type == CMD_DMA_PAGE) { | |
565 | pci_unmap_page(host->pdev, command->cmd_dma, | |
566 | command->dma_size, command->dma_dir); | |
567 | SBP2_DMA_FREE("single page"); | |
568 | } /* XXX: Check for CMD_DMA_NONE bug */ | |
569 | command->dma_type = CMD_DMA_NONE; | |
570 | command->cmd_dma = 0; | |
571 | } | |
572 | ||
573 | if (command->sge_buffer) { | |
574 | pci_unmap_sg(host->pdev, command->sge_buffer, | |
575 | command->dma_size, command->dma_dir); | |
576 | SBP2_DMA_FREE("scatter list"); | |
577 | command->sge_buffer = NULL; | |
578 | } | |
579 | } | |
580 | ||
581 | /* | |
582 | * This function moves a command to the completed orb list. | |
583 | */ | |
a237f35f SR |
584 | static void sbp2util_mark_command_completed(struct scsi_id_instance_data *scsi_id, |
585 | struct sbp2_command_info *command) | |
1da177e4 LT |
586 | { |
587 | unsigned long flags; | |
588 | ||
589 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
590 | list_del(&command->list); | |
591 | sbp2util_free_command_dma(command); | |
592 | list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed); | |
593 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
594 | } | |
595 | ||
abd559b1 JM |
596 | /* |
597 | * Is scsi_id valid? Is the 1394 node still present? | |
598 | */ | |
599 | static inline int sbp2util_node_is_available(struct scsi_id_instance_data *scsi_id) | |
600 | { | |
601 | return scsi_id && scsi_id->ne && !scsi_id->ne->in_limbo; | |
602 | } | |
603 | ||
1da177e4 LT |
604 | /********************************************* |
605 | * IEEE-1394 core driver stack related section | |
606 | *********************************************/ | |
607 | static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud); | |
608 | ||
609 | static int sbp2_probe(struct device *dev) | |
610 | { | |
611 | struct unit_directory *ud; | |
612 | struct scsi_id_instance_data *scsi_id; | |
613 | ||
614 | SBP2_DEBUG("sbp2_probe"); | |
615 | ||
616 | ud = container_of(dev, struct unit_directory, device); | |
617 | ||
618 | /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s) | |
619 | * instead. */ | |
620 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY) | |
621 | return -ENODEV; | |
622 | ||
a237f35f | 623 | scsi_id = sbp2_alloc_device(ud); |
1da177e4 | 624 | |
a237f35f SR |
625 | if (!scsi_id) |
626 | return -ENOMEM; | |
1da177e4 | 627 | |
a237f35f | 628 | sbp2_parse_unit_directory(scsi_id, ud); |
1da177e4 | 629 | |
a237f35f | 630 | return sbp2_start_device(scsi_id); |
1da177e4 LT |
631 | } |
632 | ||
633 | static int sbp2_remove(struct device *dev) | |
634 | { | |
635 | struct unit_directory *ud; | |
636 | struct scsi_id_instance_data *scsi_id; | |
abd559b1 | 637 | struct scsi_device *sdev; |
1da177e4 LT |
638 | |
639 | SBP2_DEBUG("sbp2_remove"); | |
640 | ||
641 | ud = container_of(dev, struct unit_directory, device); | |
642 | scsi_id = ud->device.driver_data; | |
abd559b1 JM |
643 | if (!scsi_id) |
644 | return 0; | |
645 | ||
646 | /* Trigger shutdown functions in scsi's highlevel. */ | |
647 | if (scsi_id->scsi_host) | |
648 | scsi_unblock_requests(scsi_id->scsi_host); | |
649 | sdev = scsi_id->sdev; | |
650 | if (sdev) { | |
651 | scsi_id->sdev = NULL; | |
652 | scsi_remove_device(sdev); | |
653 | } | |
1da177e4 LT |
654 | |
655 | sbp2_logout_device(scsi_id); | |
656 | sbp2_remove_device(scsi_id); | |
657 | ||
658 | return 0; | |
659 | } | |
660 | ||
661 | static int sbp2_update(struct unit_directory *ud) | |
662 | { | |
663 | struct scsi_id_instance_data *scsi_id = ud->device.driver_data; | |
664 | ||
665 | SBP2_DEBUG("sbp2_update"); | |
666 | ||
667 | if (sbp2_reconnect_device(scsi_id)) { | |
668 | ||
669 | /* | |
670 | * Ok, reconnect has failed. Perhaps we didn't | |
671 | * reconnect fast enough. Try doing a regular login, but | |
672 | * first do a logout just in case of any weirdness. | |
673 | */ | |
674 | sbp2_logout_device(scsi_id); | |
675 | ||
676 | if (sbp2_login_device(scsi_id)) { | |
677 | /* Login failed too, just fail, and the backend | |
678 | * will call our sbp2_remove for us */ | |
679 | SBP2_ERR("Failed to reconnect to sbp2 device!"); | |
680 | return -EBUSY; | |
681 | } | |
682 | } | |
683 | ||
684 | /* Set max retries to something large on the device. */ | |
685 | sbp2_set_busy_timeout(scsi_id); | |
686 | ||
687 | /* Do a SBP-2 fetch agent reset. */ | |
688 | sbp2_agent_reset(scsi_id, 1); | |
689 | ||
690 | /* Get the max speed and packet size that we can use. */ | |
691 | sbp2_max_speed_and_size(scsi_id); | |
692 | ||
693 | /* Complete any pending commands with busy (so they get | |
694 | * retried) and remove them from our queue | |
695 | */ | |
696 | sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY); | |
697 | ||
698 | /* Make sure we unblock requests (since this is likely after a bus | |
699 | * reset). */ | |
700 | scsi_unblock_requests(scsi_id->scsi_host); | |
701 | ||
702 | return 0; | |
703 | } | |
704 | ||
705 | /* This functions is called by the sbp2_probe, for each new device. We now | |
706 | * allocate one scsi host for each scsi_id (unit directory). */ | |
707 | static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud) | |
708 | { | |
709 | struct sbp2scsi_host_info *hi; | |
710 | struct Scsi_Host *scsi_host = NULL; | |
711 | struct scsi_id_instance_data *scsi_id = NULL; | |
712 | ||
713 | SBP2_DEBUG("sbp2_alloc_device"); | |
714 | ||
8551158a | 715 | scsi_id = kzalloc(sizeof(*scsi_id), GFP_KERNEL); |
1da177e4 LT |
716 | if (!scsi_id) { |
717 | SBP2_ERR("failed to create scsi_id"); | |
718 | goto failed_alloc; | |
719 | } | |
1da177e4 LT |
720 | |
721 | scsi_id->ne = ud->ne; | |
722 | scsi_id->ud = ud; | |
723 | scsi_id->speed_code = IEEE1394_SPEED_100; | |
724 | scsi_id->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100]; | |
725 | atomic_set(&scsi_id->sbp2_login_complete, 0); | |
726 | INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_inuse); | |
727 | INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_completed); | |
728 | INIT_LIST_HEAD(&scsi_id->scsi_list); | |
729 | spin_lock_init(&scsi_id->sbp2_command_orb_lock); | |
e309fc6d | 730 | scsi_id->sbp2_lun = 0; |
1da177e4 LT |
731 | |
732 | ud->device.driver_data = scsi_id; | |
733 | ||
734 | hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host); | |
735 | if (!hi) { | |
736 | hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host, sizeof(*hi)); | |
737 | if (!hi) { | |
738 | SBP2_ERR("failed to allocate hostinfo"); | |
739 | goto failed_alloc; | |
740 | } | |
741 | SBP2_DEBUG("sbp2_alloc_device: allocated hostinfo"); | |
742 | hi->host = ud->ne->host; | |
743 | INIT_LIST_HEAD(&hi->scsi_ids); | |
744 | ||
745 | /* Register our sbp2 status address space... */ | |
746 | hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, &sbp2_ops, | |
747 | SBP2_STATUS_FIFO_ADDRESS, | |
748 | SBP2_STATUS_FIFO_ADDRESS + | |
749 | SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(SBP2_MAX_UDS_PER_NODE+1)); | |
750 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA | |
751 | /* Handle data movement if physical dma is not | |
752 | * enabled/supportedon host controller */ | |
753 | hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, &sbp2_physdma_ops, | |
754 | 0x0ULL, 0xfffffffcULL); | |
755 | #endif | |
756 | } | |
757 | ||
758 | scsi_id->hi = hi; | |
759 | ||
760 | list_add_tail(&scsi_id->scsi_list, &hi->scsi_ids); | |
761 | ||
762 | /* Register our host with the SCSI stack. */ | |
a2ef79e1 | 763 | scsi_host = scsi_host_alloc(&scsi_driver_template, |
a237f35f | 764 | sizeof(unsigned long)); |
1da177e4 LT |
765 | if (!scsi_host) { |
766 | SBP2_ERR("failed to register scsi host"); | |
767 | goto failed_alloc; | |
768 | } | |
769 | ||
770 | scsi_host->hostdata[0] = (unsigned long)scsi_id; | |
771 | ||
772 | if (!scsi_add_host(scsi_host, &ud->device)) { | |
773 | scsi_id->scsi_host = scsi_host; | |
774 | return scsi_id; | |
775 | } | |
776 | ||
777 | SBP2_ERR("failed to add scsi host"); | |
778 | scsi_host_put(scsi_host); | |
779 | ||
780 | failed_alloc: | |
781 | sbp2_remove_device(scsi_id); | |
782 | return NULL; | |
783 | } | |
784 | ||
1da177e4 LT |
785 | static void sbp2_host_reset(struct hpsb_host *host) |
786 | { | |
787 | struct sbp2scsi_host_info *hi; | |
788 | struct scsi_id_instance_data *scsi_id; | |
789 | ||
790 | hi = hpsb_get_hostinfo(&sbp2_highlevel, host); | |
791 | ||
792 | if (hi) { | |
793 | list_for_each_entry(scsi_id, &hi->scsi_ids, scsi_list) | |
794 | scsi_block_requests(scsi_id->scsi_host); | |
795 | } | |
796 | } | |
797 | ||
1da177e4 LT |
798 | /* |
799 | * This function is where we first pull the node unique ids, and then | |
800 | * allocate memory and register a SBP-2 device. | |
801 | */ | |
802 | static int sbp2_start_device(struct scsi_id_instance_data *scsi_id) | |
803 | { | |
804 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
146f7262 | 805 | int error; |
1da177e4 LT |
806 | |
807 | SBP2_DEBUG("sbp2_start_device"); | |
808 | ||
809 | /* Login FIFO DMA */ | |
810 | scsi_id->login_response = | |
a237f35f SR |
811 | pci_alloc_consistent(hi->host->pdev, |
812 | sizeof(struct sbp2_login_response), | |
1da177e4 LT |
813 | &scsi_id->login_response_dma); |
814 | if (!scsi_id->login_response) | |
815 | goto alloc_fail; | |
816 | SBP2_DMA_ALLOC("consistent DMA region for login FIFO"); | |
817 | ||
818 | /* Query logins ORB DMA */ | |
819 | scsi_id->query_logins_orb = | |
a237f35f SR |
820 | pci_alloc_consistent(hi->host->pdev, |
821 | sizeof(struct sbp2_query_logins_orb), | |
1da177e4 LT |
822 | &scsi_id->query_logins_orb_dma); |
823 | if (!scsi_id->query_logins_orb) | |
824 | goto alloc_fail; | |
825 | SBP2_DMA_ALLOC("consistent DMA region for query logins ORB"); | |
826 | ||
827 | /* Query logins response DMA */ | |
828 | scsi_id->query_logins_response = | |
a237f35f SR |
829 | pci_alloc_consistent(hi->host->pdev, |
830 | sizeof(struct sbp2_query_logins_response), | |
1da177e4 LT |
831 | &scsi_id->query_logins_response_dma); |
832 | if (!scsi_id->query_logins_response) | |
833 | goto alloc_fail; | |
834 | SBP2_DMA_ALLOC("consistent DMA region for query logins response"); | |
835 | ||
836 | /* Reconnect ORB DMA */ | |
837 | scsi_id->reconnect_orb = | |
a237f35f SR |
838 | pci_alloc_consistent(hi->host->pdev, |
839 | sizeof(struct sbp2_reconnect_orb), | |
1da177e4 LT |
840 | &scsi_id->reconnect_orb_dma); |
841 | if (!scsi_id->reconnect_orb) | |
842 | goto alloc_fail; | |
843 | SBP2_DMA_ALLOC("consistent DMA region for reconnect ORB"); | |
844 | ||
845 | /* Logout ORB DMA */ | |
846 | scsi_id->logout_orb = | |
a237f35f SR |
847 | pci_alloc_consistent(hi->host->pdev, |
848 | sizeof(struct sbp2_logout_orb), | |
1da177e4 LT |
849 | &scsi_id->logout_orb_dma); |
850 | if (!scsi_id->logout_orb) | |
851 | goto alloc_fail; | |
852 | SBP2_DMA_ALLOC("consistent DMA region for logout ORB"); | |
853 | ||
854 | /* Login ORB DMA */ | |
855 | scsi_id->login_orb = | |
a237f35f SR |
856 | pci_alloc_consistent(hi->host->pdev, |
857 | sizeof(struct sbp2_login_orb), | |
1da177e4 | 858 | &scsi_id->login_orb_dma); |
eaceec7f SR |
859 | if (!scsi_id->login_orb) |
860 | goto alloc_fail; | |
1da177e4 LT |
861 | SBP2_DMA_ALLOC("consistent DMA region for login ORB"); |
862 | ||
863 | SBP2_DEBUG("New SBP-2 device inserted, SCSI ID = %x", scsi_id->ud->id); | |
864 | ||
865 | /* | |
866 | * Create our command orb pool | |
867 | */ | |
868 | if (sbp2util_create_command_orb_pool(scsi_id)) { | |
869 | SBP2_ERR("sbp2util_create_command_orb_pool failed!"); | |
870 | sbp2_remove_device(scsi_id); | |
871 | return -ENOMEM; | |
872 | } | |
873 | ||
874 | /* Schedule a timeout here. The reason is that we may be so close | |
875 | * to a bus reset, that the device is not available for logins. | |
876 | * This can happen when the bus reset is caused by the host | |
877 | * connected to the sbp2 device being removed. That host would | |
878 | * have a certain amount of time to relogin before the sbp2 device | |
879 | * allows someone else to login instead. One second makes sense. */ | |
880 | msleep_interruptible(1000); | |
881 | if (signal_pending(current)) { | |
882 | SBP2_WARN("aborting sbp2_start_device due to event"); | |
883 | sbp2_remove_device(scsi_id); | |
884 | return -EINTR; | |
885 | } | |
a237f35f | 886 | |
1da177e4 LT |
887 | /* |
888 | * Login to the sbp-2 device | |
889 | */ | |
890 | if (sbp2_login_device(scsi_id)) { | |
891 | /* Login failed, just remove the device. */ | |
892 | sbp2_remove_device(scsi_id); | |
893 | return -EBUSY; | |
894 | } | |
895 | ||
896 | /* | |
897 | * Set max retries to something large on the device | |
898 | */ | |
899 | sbp2_set_busy_timeout(scsi_id); | |
900 | ||
901 | /* | |
902 | * Do a SBP-2 fetch agent reset | |
903 | */ | |
904 | sbp2_agent_reset(scsi_id, 1); | |
905 | ||
906 | /* | |
907 | * Get the max speed and packet size that we can use | |
908 | */ | |
909 | sbp2_max_speed_and_size(scsi_id); | |
910 | ||
911 | /* Add this device to the scsi layer now */ | |
146f7262 JB |
912 | error = scsi_add_device(scsi_id->scsi_host, 0, scsi_id->ud->id, 0); |
913 | if (error) { | |
1da177e4 | 914 | SBP2_ERR("scsi_add_device failed"); |
dc3edd54 SR |
915 | sbp2_logout_device(scsi_id); |
916 | sbp2_remove_device(scsi_id); | |
146f7262 | 917 | return error; |
1da177e4 LT |
918 | } |
919 | ||
920 | return 0; | |
eaceec7f SR |
921 | |
922 | alloc_fail: | |
923 | SBP2_ERR("Could not allocate memory for scsi_id"); | |
924 | sbp2_remove_device(scsi_id); | |
925 | return -ENOMEM; | |
1da177e4 LT |
926 | } |
927 | ||
928 | /* | |
929 | * This function removes an sbp2 device from the sbp2scsi_host_info struct. | |
930 | */ | |
931 | static void sbp2_remove_device(struct scsi_id_instance_data *scsi_id) | |
932 | { | |
933 | struct sbp2scsi_host_info *hi; | |
934 | ||
935 | SBP2_DEBUG("sbp2_remove_device"); | |
936 | ||
937 | if (!scsi_id) | |
938 | return; | |
939 | ||
940 | hi = scsi_id->hi; | |
941 | ||
942 | /* This will remove our scsi device aswell */ | |
943 | if (scsi_id->scsi_host) { | |
944 | scsi_remove_host(scsi_id->scsi_host); | |
945 | scsi_host_put(scsi_id->scsi_host); | |
946 | } | |
947 | ||
948 | sbp2util_remove_command_orb_pool(scsi_id); | |
949 | ||
950 | list_del(&scsi_id->scsi_list); | |
951 | ||
952 | if (scsi_id->login_response) { | |
953 | pci_free_consistent(hi->host->pdev, | |
954 | sizeof(struct sbp2_login_response), | |
955 | scsi_id->login_response, | |
956 | scsi_id->login_response_dma); | |
957 | SBP2_DMA_FREE("single login FIFO"); | |
958 | } | |
959 | ||
960 | if (scsi_id->login_orb) { | |
961 | pci_free_consistent(hi->host->pdev, | |
962 | sizeof(struct sbp2_login_orb), | |
963 | scsi_id->login_orb, | |
964 | scsi_id->login_orb_dma); | |
965 | SBP2_DMA_FREE("single login ORB"); | |
966 | } | |
967 | ||
968 | if (scsi_id->reconnect_orb) { | |
969 | pci_free_consistent(hi->host->pdev, | |
970 | sizeof(struct sbp2_reconnect_orb), | |
971 | scsi_id->reconnect_orb, | |
972 | scsi_id->reconnect_orb_dma); | |
973 | SBP2_DMA_FREE("single reconnect orb"); | |
974 | } | |
975 | ||
976 | if (scsi_id->logout_orb) { | |
977 | pci_free_consistent(hi->host->pdev, | |
978 | sizeof(struct sbp2_logout_orb), | |
979 | scsi_id->logout_orb, | |
980 | scsi_id->logout_orb_dma); | |
981 | SBP2_DMA_FREE("single logout orb"); | |
982 | } | |
983 | ||
984 | if (scsi_id->query_logins_orb) { | |
985 | pci_free_consistent(hi->host->pdev, | |
986 | sizeof(struct sbp2_query_logins_orb), | |
987 | scsi_id->query_logins_orb, | |
988 | scsi_id->query_logins_orb_dma); | |
989 | SBP2_DMA_FREE("single query logins orb"); | |
990 | } | |
991 | ||
992 | if (scsi_id->query_logins_response) { | |
993 | pci_free_consistent(hi->host->pdev, | |
994 | sizeof(struct sbp2_query_logins_response), | |
995 | scsi_id->query_logins_response, | |
996 | scsi_id->query_logins_response_dma); | |
997 | SBP2_DMA_FREE("single query logins data"); | |
998 | } | |
999 | ||
1000 | scsi_id->ud->device.driver_data = NULL; | |
1001 | ||
1002 | SBP2_DEBUG("SBP-2 device removed, SCSI ID = %d", scsi_id->ud->id); | |
1003 | ||
1004 | kfree(scsi_id); | |
1005 | } | |
1006 | ||
1007 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA | |
1008 | /* | |
1009 | * This function deals with physical dma write requests (for adapters that do not support | |
1010 | * physical dma in hardware). Mostly just here for debugging... | |
1011 | */ | |
a237f35f SR |
1012 | static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid, |
1013 | int destid, quadlet_t *data, u64 addr, | |
1014 | size_t length, u16 flags) | |
1da177e4 LT |
1015 | { |
1016 | ||
a237f35f SR |
1017 | /* |
1018 | * Manually put the data in the right place. | |
1019 | */ | |
1020 | memcpy(bus_to_virt((u32) addr), data, length); | |
1021 | sbp2util_packet_dump(data, length, "sbp2 phys dma write by device", | |
1022 | (u32) addr); | |
1023 | return RCODE_COMPLETE; | |
1da177e4 LT |
1024 | } |
1025 | ||
1026 | /* | |
1027 | * This function deals with physical dma read requests (for adapters that do not support | |
1028 | * physical dma in hardware). Mostly just here for debugging... | |
1029 | */ | |
a237f35f SR |
1030 | static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid, |
1031 | quadlet_t *data, u64 addr, size_t length, | |
1032 | u16 flags) | |
1da177e4 LT |
1033 | { |
1034 | ||
a237f35f SR |
1035 | /* |
1036 | * Grab data from memory and send a read response. | |
1037 | */ | |
1038 | memcpy(data, bus_to_virt((u32) addr), length); | |
1039 | sbp2util_packet_dump(data, length, "sbp2 phys dma read by device", | |
1040 | (u32) addr); | |
1041 | return RCODE_COMPLETE; | |
1da177e4 LT |
1042 | } |
1043 | #endif | |
1044 | ||
1da177e4 LT |
1045 | /************************************** |
1046 | * SBP-2 protocol related section | |
1047 | **************************************/ | |
1048 | ||
1da177e4 LT |
1049 | /* |
1050 | * This function queries the device for the maximum concurrent logins it | |
1051 | * supports. | |
1052 | */ | |
1053 | static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id) | |
1054 | { | |
1055 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1056 | quadlet_t data[2]; | |
1057 | int max_logins; | |
1058 | int active_logins; | |
1059 | ||
1060 | SBP2_DEBUG("sbp2_query_logins"); | |
1061 | ||
1062 | scsi_id->query_logins_orb->reserved1 = 0x0; | |
1063 | scsi_id->query_logins_orb->reserved2 = 0x0; | |
1064 | ||
1065 | scsi_id->query_logins_orb->query_response_lo = scsi_id->query_logins_response_dma; | |
1066 | scsi_id->query_logins_orb->query_response_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1067 | SBP2_DEBUG("sbp2_query_logins: query_response_hi/lo initialized"); | |
1068 | ||
1069 | scsi_id->query_logins_orb->lun_misc = ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST); | |
1070 | scsi_id->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1); | |
e309fc6d | 1071 | scsi_id->query_logins_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_lun); |
1da177e4 LT |
1072 | SBP2_DEBUG("sbp2_query_logins: lun_misc initialized"); |
1073 | ||
1074 | scsi_id->query_logins_orb->reserved_resp_length = | |
1075 | ORB_SET_QUERY_LOGINS_RESP_LENGTH(sizeof(struct sbp2_query_logins_response)); | |
1076 | SBP2_DEBUG("sbp2_query_logins: reserved_resp_length initialized"); | |
1077 | ||
1078 | scsi_id->query_logins_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO + | |
1079 | SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id); | |
1080 | scsi_id->query_logins_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) | | |
1081 | SBP2_STATUS_FIFO_ADDRESS_HI); | |
1082 | SBP2_DEBUG("sbp2_query_logins: status FIFO initialized"); | |
1083 | ||
1084 | sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb)); | |
1085 | ||
1086 | SBP2_DEBUG("sbp2_query_logins: orb byte-swapped"); | |
1087 | ||
1088 | sbp2util_packet_dump(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb), | |
1089 | "sbp2 query logins orb", scsi_id->query_logins_orb_dma); | |
1090 | ||
1091 | memset(scsi_id->query_logins_response, 0, sizeof(struct sbp2_query_logins_response)); | |
1092 | memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); | |
1093 | ||
1094 | SBP2_DEBUG("sbp2_query_logins: query_logins_response/status FIFO memset"); | |
1095 | ||
1096 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); | |
1097 | data[1] = scsi_id->query_logins_orb_dma; | |
1098 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1099 | ||
1100 | atomic_set(&scsi_id->sbp2_login_complete, 0); | |
1101 | ||
1102 | SBP2_DEBUG("sbp2_query_logins: prepared to write"); | |
1103 | hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8); | |
1104 | SBP2_DEBUG("sbp2_query_logins: written"); | |
1105 | ||
1106 | if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 2*HZ)) { | |
1107 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); | |
a237f35f | 1108 | return -EIO; |
1da177e4 LT |
1109 | } |
1110 | ||
1111 | if (scsi_id->status_block.ORB_offset_lo != scsi_id->query_logins_orb_dma) { | |
1112 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); | |
a237f35f | 1113 | return -EIO; |
1da177e4 LT |
1114 | } |
1115 | ||
1116 | if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) || | |
1117 | STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) || | |
1118 | STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) { | |
1119 | ||
1120 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); | |
a237f35f | 1121 | return -EIO; |
1da177e4 LT |
1122 | } |
1123 | ||
1124 | sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_response, sizeof(struct sbp2_query_logins_response)); | |
1125 | ||
1126 | SBP2_DEBUG("length_max_logins = %x", | |
1127 | (unsigned int)scsi_id->query_logins_response->length_max_logins); | |
1128 | ||
1129 | SBP2_DEBUG("Query logins to SBP-2 device successful"); | |
1130 | ||
1131 | max_logins = RESPONSE_GET_MAX_LOGINS(scsi_id->query_logins_response->length_max_logins); | |
1132 | SBP2_DEBUG("Maximum concurrent logins supported: %d", max_logins); | |
1133 | ||
1134 | active_logins = RESPONSE_GET_ACTIVE_LOGINS(scsi_id->query_logins_response->length_max_logins); | |
1135 | SBP2_DEBUG("Number of active logins: %d", active_logins); | |
1136 | ||
1137 | if (active_logins >= max_logins) { | |
a237f35f | 1138 | return -EIO; |
1da177e4 LT |
1139 | } |
1140 | ||
1141 | return 0; | |
1142 | } | |
1143 | ||
1144 | /* | |
1145 | * This function is called in order to login to a particular SBP-2 device, | |
1146 | * after a bus reset. | |
1147 | */ | |
1148 | static int sbp2_login_device(struct scsi_id_instance_data *scsi_id) | |
1149 | { | |
1150 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1151 | quadlet_t data[2]; | |
1152 | ||
1153 | SBP2_DEBUG("sbp2_login_device"); | |
1154 | ||
1155 | if (!scsi_id->login_orb) { | |
1156 | SBP2_DEBUG("sbp2_login_device: login_orb not alloc'd!"); | |
a237f35f | 1157 | return -EIO; |
1da177e4 LT |
1158 | } |
1159 | ||
1160 | if (!exclusive_login) { | |
1161 | if (sbp2_query_logins(scsi_id)) { | |
1162 | SBP2_INFO("Device does not support any more concurrent logins"); | |
a237f35f | 1163 | return -EIO; |
1da177e4 LT |
1164 | } |
1165 | } | |
1166 | ||
1167 | /* Set-up login ORB, assume no password */ | |
1168 | scsi_id->login_orb->password_hi = 0; | |
1169 | scsi_id->login_orb->password_lo = 0; | |
1170 | SBP2_DEBUG("sbp2_login_device: password_hi/lo initialized"); | |
1171 | ||
1172 | scsi_id->login_orb->login_response_lo = scsi_id->login_response_dma; | |
1173 | scsi_id->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1174 | SBP2_DEBUG("sbp2_login_device: login_response_hi/lo initialized"); | |
1175 | ||
1176 | scsi_id->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST); | |
1177 | scsi_id->login_orb->lun_misc |= ORB_SET_RECONNECT(0); /* One second reconnect time */ | |
1178 | scsi_id->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(exclusive_login); /* Exclusive access to device */ | |
1179 | scsi_id->login_orb->lun_misc |= ORB_SET_NOTIFY(1); /* Notify us of login complete */ | |
e309fc6d | 1180 | scsi_id->login_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_lun); |
1da177e4 LT |
1181 | SBP2_DEBUG("sbp2_login_device: lun_misc initialized"); |
1182 | ||
1183 | scsi_id->login_orb->passwd_resp_lengths = | |
1184 | ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response)); | |
1185 | SBP2_DEBUG("sbp2_login_device: passwd_resp_lengths initialized"); | |
1186 | ||
1187 | scsi_id->login_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO + | |
1188 | SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id); | |
1189 | scsi_id->login_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) | | |
1190 | SBP2_STATUS_FIFO_ADDRESS_HI); | |
1191 | SBP2_DEBUG("sbp2_login_device: status FIFO initialized"); | |
1192 | ||
1193 | /* | |
1194 | * Byte swap ORB if necessary | |
1195 | */ | |
1196 | sbp2util_cpu_to_be32_buffer(scsi_id->login_orb, sizeof(struct sbp2_login_orb)); | |
1197 | ||
1198 | SBP2_DEBUG("sbp2_login_device: orb byte-swapped"); | |
1199 | ||
1200 | sbp2util_packet_dump(scsi_id->login_orb, sizeof(struct sbp2_login_orb), | |
1201 | "sbp2 login orb", scsi_id->login_orb_dma); | |
1202 | ||
1203 | /* | |
1204 | * Initialize login response and status fifo | |
1205 | */ | |
1206 | memset(scsi_id->login_response, 0, sizeof(struct sbp2_login_response)); | |
1207 | memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); | |
1208 | ||
1209 | SBP2_DEBUG("sbp2_login_device: login_response/status FIFO memset"); | |
1210 | ||
1211 | /* | |
1212 | * Ok, let's write to the target's management agent register | |
1213 | */ | |
1214 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); | |
1215 | data[1] = scsi_id->login_orb_dma; | |
1216 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1217 | ||
1218 | atomic_set(&scsi_id->sbp2_login_complete, 0); | |
1219 | ||
1220 | SBP2_DEBUG("sbp2_login_device: prepared to write to %08x", | |
1221 | (unsigned int)scsi_id->sbp2_management_agent_addr); | |
1222 | hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8); | |
1223 | SBP2_DEBUG("sbp2_login_device: written"); | |
1224 | ||
1225 | /* | |
1226 | * Wait for login status (up to 20 seconds)... | |
1227 | */ | |
1228 | if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 20*HZ)) { | |
1229 | SBP2_ERR("Error logging into SBP-2 device - login timed-out"); | |
a237f35f | 1230 | return -EIO; |
1da177e4 LT |
1231 | } |
1232 | ||
1233 | /* | |
1234 | * Sanity. Make sure status returned matches login orb. | |
1235 | */ | |
1236 | if (scsi_id->status_block.ORB_offset_lo != scsi_id->login_orb_dma) { | |
1237 | SBP2_ERR("Error logging into SBP-2 device - login timed-out"); | |
a237f35f | 1238 | return -EIO; |
1da177e4 LT |
1239 | } |
1240 | ||
1241 | /* | |
1242 | * Check status | |
1243 | */ | |
1244 | if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) || | |
1245 | STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) || | |
1246 | STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) { | |
1247 | ||
1248 | SBP2_ERR("Error logging into SBP-2 device - login failed"); | |
a237f35f | 1249 | return -EIO; |
1da177e4 LT |
1250 | } |
1251 | ||
1252 | /* | |
1253 | * Byte swap the login response, for use when reconnecting or | |
1254 | * logging out. | |
1255 | */ | |
1256 | sbp2util_cpu_to_be32_buffer(scsi_id->login_response, sizeof(struct sbp2_login_response)); | |
1257 | ||
1258 | /* | |
1259 | * Grab our command block agent address from the login response. | |
1260 | */ | |
1261 | SBP2_DEBUG("command_block_agent_hi = %x", | |
1262 | (unsigned int)scsi_id->login_response->command_block_agent_hi); | |
1263 | SBP2_DEBUG("command_block_agent_lo = %x", | |
1264 | (unsigned int)scsi_id->login_response->command_block_agent_lo); | |
1265 | ||
1266 | scsi_id->sbp2_command_block_agent_addr = | |
1267 | ((u64)scsi_id->login_response->command_block_agent_hi) << 32; | |
1268 | scsi_id->sbp2_command_block_agent_addr |= ((u64)scsi_id->login_response->command_block_agent_lo); | |
1269 | scsi_id->sbp2_command_block_agent_addr &= 0x0000ffffffffffffULL; | |
1270 | ||
1271 | SBP2_INFO("Logged into SBP-2 device"); | |
1272 | ||
a237f35f | 1273 | return 0; |
1da177e4 LT |
1274 | |
1275 | } | |
1276 | ||
1277 | /* | |
1278 | * This function is called in order to logout from a particular SBP-2 | |
1279 | * device, usually called during driver unload. | |
1280 | */ | |
1281 | static int sbp2_logout_device(struct scsi_id_instance_data *scsi_id) | |
1282 | { | |
1283 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1284 | quadlet_t data[2]; | |
1285 | int error; | |
1286 | ||
1287 | SBP2_DEBUG("sbp2_logout_device"); | |
1288 | ||
1289 | /* | |
1290 | * Set-up logout ORB | |
1291 | */ | |
1292 | scsi_id->logout_orb->reserved1 = 0x0; | |
1293 | scsi_id->logout_orb->reserved2 = 0x0; | |
1294 | scsi_id->logout_orb->reserved3 = 0x0; | |
1295 | scsi_id->logout_orb->reserved4 = 0x0; | |
1296 | ||
1297 | scsi_id->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST); | |
1298 | scsi_id->logout_orb->login_ID_misc |= ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID); | |
1299 | ||
1300 | /* Notify us when complete */ | |
1301 | scsi_id->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1); | |
1302 | ||
1303 | scsi_id->logout_orb->reserved5 = 0x0; | |
1304 | scsi_id->logout_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO + | |
1305 | SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id); | |
1306 | scsi_id->logout_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) | | |
1307 | SBP2_STATUS_FIFO_ADDRESS_HI); | |
1308 | ||
1309 | /* | |
1310 | * Byte swap ORB if necessary | |
1311 | */ | |
1312 | sbp2util_cpu_to_be32_buffer(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb)); | |
1313 | ||
1314 | sbp2util_packet_dump(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb), | |
1315 | "sbp2 logout orb", scsi_id->logout_orb_dma); | |
1316 | ||
1317 | /* | |
1318 | * Ok, let's write to the target's management agent register | |
1319 | */ | |
1320 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); | |
1321 | data[1] = scsi_id->logout_orb_dma; | |
1322 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1323 | ||
1324 | atomic_set(&scsi_id->sbp2_login_complete, 0); | |
1325 | ||
1326 | error = hpsb_node_write(scsi_id->ne, | |
a237f35f | 1327 | scsi_id->sbp2_management_agent_addr, data, 8); |
1da177e4 LT |
1328 | if (error) |
1329 | return error; | |
1330 | ||
1331 | /* Wait for device to logout...1 second. */ | |
1332 | if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ)) | |
1333 | return -EIO; | |
1334 | ||
1335 | SBP2_INFO("Logged out of SBP-2 device"); | |
1336 | ||
a237f35f | 1337 | return 0; |
1da177e4 LT |
1338 | |
1339 | } | |
1340 | ||
1341 | /* | |
1342 | * This function is called in order to reconnect to a particular SBP-2 | |
1343 | * device, after a bus reset. | |
1344 | */ | |
1345 | static int sbp2_reconnect_device(struct scsi_id_instance_data *scsi_id) | |
1346 | { | |
1347 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1348 | quadlet_t data[2]; | |
1349 | int error; | |
1350 | ||
1351 | SBP2_DEBUG("sbp2_reconnect_device"); | |
1352 | ||
1353 | /* | |
1354 | * Set-up reconnect ORB | |
1355 | */ | |
1356 | scsi_id->reconnect_orb->reserved1 = 0x0; | |
1357 | scsi_id->reconnect_orb->reserved2 = 0x0; | |
1358 | scsi_id->reconnect_orb->reserved3 = 0x0; | |
1359 | scsi_id->reconnect_orb->reserved4 = 0x0; | |
1360 | ||
1361 | scsi_id->reconnect_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST); | |
1362 | scsi_id->reconnect_orb->login_ID_misc |= | |
1363 | ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID); | |
1364 | ||
1365 | /* Notify us when complete */ | |
1366 | scsi_id->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1); | |
1367 | ||
1368 | scsi_id->reconnect_orb->reserved5 = 0x0; | |
1369 | scsi_id->reconnect_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO + | |
1370 | SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id); | |
1371 | scsi_id->reconnect_orb->status_FIFO_hi = | |
1372 | (ORB_SET_NODE_ID(hi->host->node_id) | SBP2_STATUS_FIFO_ADDRESS_HI); | |
1373 | ||
1374 | /* | |
1375 | * Byte swap ORB if necessary | |
1376 | */ | |
1377 | sbp2util_cpu_to_be32_buffer(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb)); | |
1378 | ||
1379 | sbp2util_packet_dump(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb), | |
1380 | "sbp2 reconnect orb", scsi_id->reconnect_orb_dma); | |
1381 | ||
1382 | /* | |
1383 | * Initialize status fifo | |
1384 | */ | |
1385 | memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); | |
1386 | ||
1387 | /* | |
1388 | * Ok, let's write to the target's management agent register | |
1389 | */ | |
1390 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); | |
1391 | data[1] = scsi_id->reconnect_orb_dma; | |
1392 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1393 | ||
1394 | atomic_set(&scsi_id->sbp2_login_complete, 0); | |
1395 | ||
1396 | error = hpsb_node_write(scsi_id->ne, | |
a237f35f | 1397 | scsi_id->sbp2_management_agent_addr, data, 8); |
1da177e4 LT |
1398 | if (error) |
1399 | return error; | |
1400 | ||
1401 | /* | |
1402 | * Wait for reconnect status (up to 1 second)... | |
1403 | */ | |
1404 | if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ)) { | |
1405 | SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out"); | |
a237f35f | 1406 | return -EIO; |
1da177e4 LT |
1407 | } |
1408 | ||
1409 | /* | |
1410 | * Sanity. Make sure status returned matches reconnect orb. | |
1411 | */ | |
1412 | if (scsi_id->status_block.ORB_offset_lo != scsi_id->reconnect_orb_dma) { | |
1413 | SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out"); | |
a237f35f | 1414 | return -EIO; |
1da177e4 LT |
1415 | } |
1416 | ||
1417 | /* | |
1418 | * Check status | |
1419 | */ | |
1420 | if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) || | |
1421 | STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) || | |
1422 | STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) { | |
1423 | ||
1424 | SBP2_ERR("Error reconnecting to SBP-2 device - reconnect failed"); | |
a237f35f | 1425 | return -EIO; |
1da177e4 LT |
1426 | } |
1427 | ||
1428 | HPSB_DEBUG("Reconnected to SBP-2 device"); | |
1429 | ||
a237f35f | 1430 | return 0; |
1da177e4 LT |
1431 | |
1432 | } | |
1433 | ||
1434 | /* | |
1435 | * This function is called in order to set the busy timeout (number of | |
1436 | * retries to attempt) on the sbp2 device. | |
1437 | */ | |
1438 | static int sbp2_set_busy_timeout(struct scsi_id_instance_data *scsi_id) | |
1439 | { | |
1440 | quadlet_t data; | |
1441 | ||
1442 | SBP2_DEBUG("sbp2_set_busy_timeout"); | |
1443 | ||
1444 | /* | |
1445 | * Ok, let's write to the target's busy timeout register | |
1446 | */ | |
1447 | data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE); | |
1448 | ||
1449 | if (hpsb_node_write(scsi_id->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4)) { | |
1450 | SBP2_ERR("sbp2_set_busy_timeout error"); | |
1451 | } | |
1452 | ||
a237f35f | 1453 | return 0; |
1da177e4 LT |
1454 | } |
1455 | ||
1da177e4 LT |
1456 | /* |
1457 | * This function is called to parse sbp2 device's config rom unit | |
1458 | * directory. Used to determine things like sbp2 management agent offset, | |
1459 | * and command set used (SCSI or RBC). | |
1460 | */ | |
1461 | static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id, | |
1462 | struct unit_directory *ud) | |
1463 | { | |
1464 | struct csr1212_keyval *kv; | |
1465 | struct csr1212_dentry *dentry; | |
1466 | u64 management_agent_addr; | |
1467 | u32 command_set_spec_id, command_set, unit_characteristics, | |
a237f35f | 1468 | firmware_revision, workarounds; |
1da177e4 LT |
1469 | int i; |
1470 | ||
1471 | SBP2_DEBUG("sbp2_parse_unit_directory"); | |
1472 | ||
1473 | management_agent_addr = 0x0; | |
1474 | command_set_spec_id = 0x0; | |
1475 | command_set = 0x0; | |
1476 | unit_characteristics = 0x0; | |
1477 | firmware_revision = 0x0; | |
1478 | ||
1479 | /* Handle different fields in the unit directory, based on keys */ | |
1480 | csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) { | |
1481 | switch (kv->key.id) { | |
1482 | case CSR1212_KV_ID_DEPENDENT_INFO: | |
1483 | if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET) { | |
1484 | /* Save off the management agent address */ | |
1485 | management_agent_addr = | |
a237f35f SR |
1486 | CSR1212_REGISTER_SPACE_BASE + |
1487 | (kv->value.csr_offset << 2); | |
1da177e4 LT |
1488 | |
1489 | SBP2_DEBUG("sbp2_management_agent_addr = %x", | |
a237f35f | 1490 | (unsigned int)management_agent_addr); |
1da177e4 | 1491 | } else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { |
a237f35f SR |
1492 | scsi_id->sbp2_lun = |
1493 | ORB_SET_LUN(kv->value.immediate); | |
1da177e4 LT |
1494 | } |
1495 | break; | |
1496 | ||
1497 | case SBP2_COMMAND_SET_SPEC_ID_KEY: | |
1498 | /* Command spec organization */ | |
1499 | command_set_spec_id = kv->value.immediate; | |
1500 | SBP2_DEBUG("sbp2_command_set_spec_id = %x", | |
a237f35f | 1501 | (unsigned int)command_set_spec_id); |
1da177e4 LT |
1502 | break; |
1503 | ||
1504 | case SBP2_COMMAND_SET_KEY: | |
1505 | /* Command set used by sbp2 device */ | |
1506 | command_set = kv->value.immediate; | |
1507 | SBP2_DEBUG("sbp2_command_set = %x", | |
a237f35f | 1508 | (unsigned int)command_set); |
1da177e4 LT |
1509 | break; |
1510 | ||
1511 | case SBP2_UNIT_CHARACTERISTICS_KEY: | |
1512 | /* | |
1513 | * Unit characterisitcs (orb related stuff | |
1514 | * that I'm not yet paying attention to) | |
1515 | */ | |
1516 | unit_characteristics = kv->value.immediate; | |
1517 | SBP2_DEBUG("sbp2_unit_characteristics = %x", | |
a237f35f | 1518 | (unsigned int)unit_characteristics); |
1da177e4 LT |
1519 | break; |
1520 | ||
1521 | case SBP2_FIRMWARE_REVISION_KEY: | |
1522 | /* Firmware revision */ | |
1523 | firmware_revision = kv->value.immediate; | |
1524 | if (force_inquiry_hack) | |
1525 | SBP2_INFO("sbp2_firmware_revision = %x", | |
a237f35f SR |
1526 | (unsigned int)firmware_revision); |
1527 | else | |
1528 | SBP2_DEBUG("sbp2_firmware_revision = %x", | |
1529 | (unsigned int)firmware_revision); | |
1da177e4 LT |
1530 | break; |
1531 | ||
1532 | default: | |
1533 | break; | |
1534 | } | |
1535 | } | |
1536 | ||
1537 | /* This is the start of our broken device checking. We try to hack | |
1538 | * around oddities and known defects. */ | |
1539 | workarounds = 0x0; | |
1540 | ||
1541 | /* If the vendor id is 0xa0b8 (Symbios vendor id), then we have a | |
1542 | * bridge with 128KB max transfer size limitation. For sanity, we | |
1543 | * only voice this when the current max_sectors setting | |
1544 | * exceeds the 128k limit. By default, that is not the case. | |
1545 | * | |
1546 | * It would be really nice if we could detect this before the scsi | |
1547 | * host gets initialized. That way we can down-force the | |
1548 | * max_sectors to account for it. That is not currently | |
1549 | * possible. */ | |
1550 | if ((firmware_revision & 0xffff00) == | |
1551 | SBP2_128KB_BROKEN_FIRMWARE && | |
1552 | (max_sectors * 512) > (128*1024)) { | |
1553 | SBP2_WARN("Node " NODE_BUS_FMT ": Bridge only supports 128KB max transfer size.", | |
1554 | NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid)); | |
1555 | SBP2_WARN("WARNING: Current max_sectors setting is larger than 128KB (%d sectors)!", | |
1556 | max_sectors); | |
1557 | workarounds |= SBP2_BREAKAGE_128K_MAX_TRANSFER; | |
1558 | } | |
1559 | ||
1560 | /* Check for a blacklisted set of devices that require us to force | |
1561 | * a 36 byte host inquiry. This can be overriden as a module param | |
1562 | * (to force all hosts). */ | |
1563 | for (i = 0; i < NUM_BROKEN_INQUIRY_DEVS; i++) { | |
1564 | if ((firmware_revision & 0xffff00) == | |
1565 | sbp2_broken_inquiry_list[i]) { | |
1566 | SBP2_WARN("Node " NODE_BUS_FMT ": Using 36byte inquiry workaround", | |
1567 | NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid)); | |
1568 | workarounds |= SBP2_BREAKAGE_INQUIRY_HACK; | |
1569 | break; /* No need to continue. */ | |
1570 | } | |
1571 | } | |
1572 | ||
1573 | /* If this is a logical unit directory entry, process the parent | |
1574 | * to get the values. */ | |
1575 | if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) { | |
1576 | struct unit_directory *parent_ud = | |
1577 | container_of(ud->device.parent, struct unit_directory, device); | |
1578 | sbp2_parse_unit_directory(scsi_id, parent_ud); | |
1579 | } else { | |
1580 | scsi_id->sbp2_management_agent_addr = management_agent_addr; | |
1581 | scsi_id->sbp2_command_set_spec_id = command_set_spec_id; | |
1582 | scsi_id->sbp2_command_set = command_set; | |
1583 | scsi_id->sbp2_unit_characteristics = unit_characteristics; | |
1584 | scsi_id->sbp2_firmware_revision = firmware_revision; | |
1585 | scsi_id->workarounds = workarounds; | |
1586 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN) | |
e309fc6d | 1587 | scsi_id->sbp2_lun = ORB_SET_LUN(ud->lun); |
1da177e4 LT |
1588 | } |
1589 | } | |
1590 | ||
1591 | /* | |
1592 | * This function is called in order to determine the max speed and packet | |
1593 | * size we can use in our ORBs. Note, that we (the driver and host) only | |
1594 | * initiate the transaction. The SBP-2 device actually transfers the data | |
1595 | * (by reading from the DMA area we tell it). This means that the SBP-2 | |
1596 | * device decides the actual maximum data it can transfer. We just tell it | |
1597 | * the speed that it needs to use, and the max_rec the host supports, and | |
1598 | * it takes care of the rest. | |
1599 | */ | |
1600 | static int sbp2_max_speed_and_size(struct scsi_id_instance_data *scsi_id) | |
1601 | { | |
1602 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1603 | ||
1604 | SBP2_DEBUG("sbp2_max_speed_and_size"); | |
1605 | ||
1606 | /* Initial setting comes from the hosts speed map */ | |
a237f35f SR |
1607 | scsi_id->speed_code = |
1608 | hi->host->speed_map[NODEID_TO_NODE(hi->host->node_id) * 64 + | |
1609 | NODEID_TO_NODE(scsi_id->ne->nodeid)]; | |
1da177e4 LT |
1610 | |
1611 | /* Bump down our speed if the user requested it */ | |
1612 | if (scsi_id->speed_code > max_speed) { | |
1613 | scsi_id->speed_code = max_speed; | |
1614 | SBP2_ERR("Forcing SBP-2 max speed down to %s", | |
1615 | hpsb_speedto_str[scsi_id->speed_code]); | |
1616 | } | |
1617 | ||
1618 | /* Payload size is the lesser of what our speed supports and what | |
1619 | * our host supports. */ | |
a237f35f SR |
1620 | scsi_id->max_payload_size = |
1621 | min(sbp2_speedto_max_payload[scsi_id->speed_code], | |
1622 | (u8) (hi->host->csr.max_rec - 1)); | |
1da177e4 LT |
1623 | |
1624 | HPSB_DEBUG("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]", | |
1625 | NODE_BUS_ARGS(hi->host, scsi_id->ne->nodeid), | |
1626 | hpsb_speedto_str[scsi_id->speed_code], | |
a237f35f | 1627 | 1 << ((u32) scsi_id->max_payload_size + 2)); |
1da177e4 | 1628 | |
a237f35f | 1629 | return 0; |
1da177e4 LT |
1630 | } |
1631 | ||
1632 | /* | |
1633 | * This function is called in order to perform a SBP-2 agent reset. | |
1634 | */ | |
1635 | static int sbp2_agent_reset(struct scsi_id_instance_data *scsi_id, int wait) | |
1636 | { | |
1637 | quadlet_t data; | |
1638 | u64 addr; | |
1639 | int retval; | |
1640 | ||
1641 | SBP2_DEBUG("sbp2_agent_reset"); | |
1642 | ||
1643 | /* | |
1644 | * Ok, let's write to the target's management agent register | |
1645 | */ | |
1646 | data = ntohl(SBP2_AGENT_RESET_DATA); | |
1647 | addr = scsi_id->sbp2_command_block_agent_addr + SBP2_AGENT_RESET_OFFSET; | |
1648 | ||
1649 | if (wait) | |
1650 | retval = hpsb_node_write(scsi_id->ne, addr, &data, 4); | |
1651 | else | |
1652 | retval = sbp2util_node_write_no_wait(scsi_id->ne, addr, &data, 4); | |
1653 | ||
1654 | if (retval < 0) { | |
1655 | SBP2_ERR("hpsb_node_write failed.\n"); | |
1656 | return -EIO; | |
1657 | } | |
1658 | ||
1659 | /* | |
1660 | * Need to make sure orb pointer is written on next command | |
1661 | */ | |
1662 | scsi_id->last_orb = NULL; | |
1663 | ||
a237f35f | 1664 | return 0; |
1da177e4 LT |
1665 | } |
1666 | ||
cf8d2c09 SR |
1667 | static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb, |
1668 | struct sbp2scsi_host_info *hi, | |
1669 | struct sbp2_command_info *command, | |
1670 | unsigned int scsi_use_sg, | |
1671 | struct scatterlist *sgpnt, | |
1672 | u32 orb_direction, | |
1673 | enum dma_data_direction dma_dir) | |
1674 | { | |
1675 | command->dma_dir = dma_dir; | |
1676 | orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1677 | orb->misc |= ORB_SET_DIRECTION(orb_direction); | |
1678 | ||
1679 | /* Special case if only one element (and less than 64KB in size) */ | |
1680 | if ((scsi_use_sg == 1) && | |
1681 | (sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) { | |
1682 | ||
1683 | SBP2_DEBUG("Only one s/g element"); | |
1684 | command->dma_size = sgpnt[0].length; | |
1685 | command->dma_type = CMD_DMA_PAGE; | |
1686 | command->cmd_dma = pci_map_page(hi->host->pdev, | |
1687 | sgpnt[0].page, | |
1688 | sgpnt[0].offset, | |
1689 | command->dma_size, | |
1690 | command->dma_dir); | |
1691 | SBP2_DMA_ALLOC("single page scatter element"); | |
1692 | ||
1693 | orb->data_descriptor_lo = command->cmd_dma; | |
1694 | orb->misc |= ORB_SET_DATA_SIZE(command->dma_size); | |
1695 | ||
1696 | } else { | |
1697 | struct sbp2_unrestricted_page_table *sg_element = | |
1698 | &command->scatter_gather_element[0]; | |
1699 | u32 sg_count, sg_len; | |
1700 | dma_addr_t sg_addr; | |
1701 | int i, count = pci_map_sg(hi->host->pdev, sgpnt, scsi_use_sg, | |
1702 | dma_dir); | |
1703 | ||
1704 | SBP2_DMA_ALLOC("scatter list"); | |
1705 | ||
1706 | command->dma_size = scsi_use_sg; | |
1707 | command->sge_buffer = sgpnt; | |
1708 | ||
1709 | /* use page tables (s/g) */ | |
1710 | orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); | |
1711 | orb->data_descriptor_lo = command->sge_dma; | |
1712 | ||
1713 | /* | |
1714 | * Loop through and fill out our sbp-2 page tables | |
1715 | * (and split up anything too large) | |
1716 | */ | |
1717 | for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) { | |
1718 | sg_len = sg_dma_len(sgpnt); | |
1719 | sg_addr = sg_dma_address(sgpnt); | |
1720 | while (sg_len) { | |
1721 | sg_element[sg_count].segment_base_lo = sg_addr; | |
1722 | if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { | |
1723 | sg_element[sg_count].length_segment_base_hi = | |
1724 | PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); | |
1725 | sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; | |
1726 | sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; | |
1727 | } else { | |
1728 | sg_element[sg_count].length_segment_base_hi = | |
1729 | PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); | |
1730 | sg_len = 0; | |
1731 | } | |
1732 | sg_count++; | |
1733 | } | |
1734 | } | |
1735 | ||
1736 | /* Number of page table (s/g) elements */ | |
1737 | orb->misc |= ORB_SET_DATA_SIZE(sg_count); | |
1738 | ||
1739 | sbp2util_packet_dump(sg_element, | |
1740 | (sizeof(struct sbp2_unrestricted_page_table)) * sg_count, | |
1741 | "sbp2 s/g list", command->sge_dma); | |
1742 | ||
1743 | /* Byte swap page tables if necessary */ | |
1744 | sbp2util_cpu_to_be32_buffer(sg_element, | |
1745 | (sizeof(struct sbp2_unrestricted_page_table)) * | |
1746 | sg_count); | |
1747 | } | |
1748 | } | |
1749 | ||
1750 | static void sbp2_prep_command_orb_no_sg(struct sbp2_command_orb *orb, | |
1751 | struct sbp2scsi_host_info *hi, | |
1752 | struct sbp2_command_info *command, | |
1753 | struct scatterlist *sgpnt, | |
1754 | u32 orb_direction, | |
1755 | unsigned int scsi_request_bufflen, | |
1756 | void *scsi_request_buffer, | |
1757 | enum dma_data_direction dma_dir) | |
1758 | { | |
1759 | command->dma_dir = dma_dir; | |
1760 | command->dma_size = scsi_request_bufflen; | |
1761 | command->dma_type = CMD_DMA_SINGLE; | |
1762 | command->cmd_dma = pci_map_single(hi->host->pdev, scsi_request_buffer, | |
1763 | command->dma_size, command->dma_dir); | |
1764 | orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1765 | orb->misc |= ORB_SET_DIRECTION(orb_direction); | |
1766 | ||
1767 | SBP2_DMA_ALLOC("single bulk"); | |
1768 | ||
1769 | /* | |
1770 | * Handle case where we get a command w/o s/g enabled (but | |
1771 | * check for transfers larger than 64K) | |
1772 | */ | |
1773 | if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) { | |
1774 | ||
1775 | orb->data_descriptor_lo = command->cmd_dma; | |
1776 | orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen); | |
1777 | ||
1778 | } else { | |
1779 | struct sbp2_unrestricted_page_table *sg_element = | |
1780 | &command->scatter_gather_element[0]; | |
1781 | u32 sg_count, sg_len; | |
1782 | dma_addr_t sg_addr; | |
1783 | ||
1784 | /* | |
1785 | * Need to turn this into page tables, since the | |
1786 | * buffer is too large. | |
1787 | */ | |
1788 | orb->data_descriptor_lo = command->sge_dma; | |
1789 | ||
1790 | /* Use page tables (s/g) */ | |
1791 | orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); | |
1792 | ||
1793 | /* | |
1794 | * fill out our sbp-2 page tables (and split up | |
1795 | * the large buffer) | |
1796 | */ | |
1797 | sg_count = 0; | |
1798 | sg_len = scsi_request_bufflen; | |
1799 | sg_addr = command->cmd_dma; | |
1800 | while (sg_len) { | |
1801 | sg_element[sg_count].segment_base_lo = sg_addr; | |
1802 | if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { | |
1803 | sg_element[sg_count].length_segment_base_hi = | |
1804 | PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); | |
1805 | sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; | |
1806 | sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; | |
1807 | } else { | |
1808 | sg_element[sg_count].length_segment_base_hi = | |
1809 | PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); | |
1810 | sg_len = 0; | |
1811 | } | |
1812 | sg_count++; | |
1813 | } | |
1814 | ||
1815 | /* Number of page table (s/g) elements */ | |
1816 | orb->misc |= ORB_SET_DATA_SIZE(sg_count); | |
1817 | ||
1818 | sbp2util_packet_dump(sg_element, | |
1819 | (sizeof(struct sbp2_unrestricted_page_table)) * sg_count, | |
1820 | "sbp2 s/g list", command->sge_dma); | |
1821 | ||
1822 | /* Byte swap page tables if necessary */ | |
1823 | sbp2util_cpu_to_be32_buffer(sg_element, | |
1824 | (sizeof(struct sbp2_unrestricted_page_table)) * | |
1825 | sg_count); | |
1826 | } | |
1827 | } | |
1828 | ||
1da177e4 LT |
1829 | /* |
1830 | * This function is called to create the actual command orb and s/g list | |
1831 | * out of the scsi command itself. | |
1832 | */ | |
cf8d2c09 SR |
1833 | static void sbp2_create_command_orb(struct scsi_id_instance_data *scsi_id, |
1834 | struct sbp2_command_info *command, | |
1835 | unchar *scsi_cmd, | |
1836 | unsigned int scsi_use_sg, | |
1837 | unsigned int scsi_request_bufflen, | |
1838 | void *scsi_request_buffer, | |
1839 | enum dma_data_direction dma_dir) | |
1da177e4 LT |
1840 | { |
1841 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
a237f35f | 1842 | struct scatterlist *sgpnt = (struct scatterlist *)scsi_request_buffer; |
1da177e4 | 1843 | struct sbp2_command_orb *command_orb = &command->command_orb; |
cf8d2c09 | 1844 | u32 orb_direction; |
1da177e4 LT |
1845 | |
1846 | /* | |
1847 | * Set-up our command ORB.. | |
1848 | * | |
1849 | * NOTE: We're doing unrestricted page tables (s/g), as this is | |
1850 | * best performance (at least with the devices I have). This means | |
1851 | * that data_size becomes the number of s/g elements, and | |
1852 | * page_size should be zero (for unrestricted). | |
1853 | */ | |
1854 | command_orb->next_ORB_hi = ORB_SET_NULL_PTR(1); | |
1855 | command_orb->next_ORB_lo = 0x0; | |
1856 | command_orb->misc = ORB_SET_MAX_PAYLOAD(scsi_id->max_payload_size); | |
1857 | command_orb->misc |= ORB_SET_SPEED(scsi_id->speed_code); | |
a237f35f | 1858 | command_orb->misc |= ORB_SET_NOTIFY(1); /* Notify us when complete */ |
1da177e4 | 1859 | |
43863eba | 1860 | if (dma_dir == DMA_NONE) |
a237f35f | 1861 | orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; |
43863eba | 1862 | else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen) |
a237f35f | 1863 | orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA; |
43863eba | 1864 | else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen) |
a237f35f | 1865 | orb_direction = ORB_DIRECTION_READ_FROM_MEDIA; |
43863eba SR |
1866 | else { |
1867 | SBP2_WARN("Falling back to DMA_NONE"); | |
1868 | orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; | |
1da177e4 LT |
1869 | } |
1870 | ||
cf8d2c09 | 1871 | /* Set-up our pagetable stuff */ |
1da177e4 | 1872 | if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) { |
1da177e4 | 1873 | SBP2_DEBUG("No data transfer"); |
1da177e4 LT |
1874 | command_orb->data_descriptor_hi = 0x0; |
1875 | command_orb->data_descriptor_lo = 0x0; | |
1876 | command_orb->misc |= ORB_SET_DIRECTION(1); | |
1da177e4 | 1877 | } else if (scsi_use_sg) { |
1da177e4 | 1878 | SBP2_DEBUG("Use scatter/gather"); |
cf8d2c09 SR |
1879 | sbp2_prep_command_orb_sg(command_orb, hi, command, scsi_use_sg, |
1880 | sgpnt, orb_direction, dma_dir); | |
1da177e4 | 1881 | } else { |
1da177e4 | 1882 | SBP2_DEBUG("No scatter/gather"); |
cf8d2c09 SR |
1883 | sbp2_prep_command_orb_no_sg(command_orb, hi, command, sgpnt, |
1884 | orb_direction, scsi_request_bufflen, | |
1885 | scsi_request_buffer, dma_dir); | |
1da177e4 LT |
1886 | } |
1887 | ||
cf8d2c09 | 1888 | /* Byte swap command ORB if necessary */ |
1da177e4 LT |
1889 | sbp2util_cpu_to_be32_buffer(command_orb, sizeof(struct sbp2_command_orb)); |
1890 | ||
cf8d2c09 | 1891 | /* Put our scsi command in the command ORB */ |
1da177e4 LT |
1892 | memset(command_orb->cdb, 0, 12); |
1893 | memcpy(command_orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd)); | |
1da177e4 LT |
1894 | } |
1895 | ||
1896 | /* | |
1897 | * This function is called in order to begin a regular SBP-2 command. | |
1898 | */ | |
1899 | static int sbp2_link_orb_command(struct scsi_id_instance_data *scsi_id, | |
1900 | struct sbp2_command_info *command) | |
1901 | { | |
1902 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1903 | struct sbp2_command_orb *command_orb = &command->command_orb; | |
1904 | struct node_entry *ne = scsi_id->ne; | |
1905 | u64 addr; | |
1906 | ||
1907 | outstanding_orb_incr; | |
1908 | SBP2_ORB_DEBUG("sending command orb %p, total orbs = %x", | |
a237f35f | 1909 | command_orb, global_outstanding_command_orbs); |
1da177e4 LT |
1910 | |
1911 | pci_dma_sync_single_for_device(hi->host->pdev, command->command_orb_dma, | |
1912 | sizeof(struct sbp2_command_orb), | |
1913 | PCI_DMA_BIDIRECTIONAL); | |
1914 | pci_dma_sync_single_for_device(hi->host->pdev, command->sge_dma, | |
1915 | sizeof(command->scatter_gather_element), | |
1916 | PCI_DMA_BIDIRECTIONAL); | |
1917 | /* | |
1918 | * Check to see if there are any previous orbs to use | |
1919 | */ | |
1920 | if (scsi_id->last_orb == NULL) { | |
1921 | quadlet_t data[2]; | |
1922 | ||
1923 | /* | |
1924 | * Ok, let's write to the target's management agent register | |
1925 | */ | |
1926 | addr = scsi_id->sbp2_command_block_agent_addr + SBP2_ORB_POINTER_OFFSET; | |
1927 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); | |
1928 | data[1] = command->command_orb_dma; | |
1929 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1930 | ||
1931 | SBP2_ORB_DEBUG("write command agent, command orb %p", command_orb); | |
1932 | ||
1933 | if (sbp2util_node_write_no_wait(ne, addr, data, 8) < 0) { | |
1934 | SBP2_ERR("sbp2util_node_write_no_wait failed.\n"); | |
1935 | return -EIO; | |
1936 | } | |
1937 | ||
1938 | SBP2_ORB_DEBUG("write command agent complete"); | |
1939 | ||
1940 | scsi_id->last_orb = command_orb; | |
1941 | scsi_id->last_orb_dma = command->command_orb_dma; | |
1942 | ||
1943 | } else { | |
1944 | quadlet_t data; | |
1945 | ||
1946 | /* | |
1947 | * We have an orb already sent (maybe or maybe not | |
1948 | * processed) that we can append this orb to. So do so, | |
1949 | * and ring the doorbell. Have to be very careful | |
1950 | * modifying these next orb pointers, as they are accessed | |
1951 | * both by the sbp2 device and us. | |
1952 | */ | |
1953 | scsi_id->last_orb->next_ORB_lo = | |
a237f35f | 1954 | cpu_to_be32(command->command_orb_dma); |
1da177e4 LT |
1955 | /* Tells hardware that this pointer is valid */ |
1956 | scsi_id->last_orb->next_ORB_hi = 0x0; | |
a237f35f SR |
1957 | pci_dma_sync_single_for_device(hi->host->pdev, |
1958 | scsi_id->last_orb_dma, | |
1da177e4 LT |
1959 | sizeof(struct sbp2_command_orb), |
1960 | PCI_DMA_BIDIRECTIONAL); | |
1961 | ||
1962 | /* | |
1963 | * Ring the doorbell | |
1964 | */ | |
1965 | data = cpu_to_be32(command->command_orb_dma); | |
1966 | addr = scsi_id->sbp2_command_block_agent_addr + SBP2_DOORBELL_OFFSET; | |
1967 | ||
1968 | SBP2_ORB_DEBUG("ring doorbell, command orb %p", command_orb); | |
1969 | ||
1970 | if (sbp2util_node_write_no_wait(ne, addr, &data, 4) < 0) { | |
1971 | SBP2_ERR("sbp2util_node_write_no_wait failed"); | |
a237f35f | 1972 | return -EIO; |
1da177e4 LT |
1973 | } |
1974 | ||
1975 | scsi_id->last_orb = command_orb; | |
1976 | scsi_id->last_orb_dma = command->command_orb_dma; | |
1977 | ||
1978 | } | |
a237f35f | 1979 | return 0; |
1da177e4 LT |
1980 | } |
1981 | ||
1982 | /* | |
1983 | * This function is called in order to begin a regular SBP-2 command. | |
1984 | */ | |
1985 | static int sbp2_send_command(struct scsi_id_instance_data *scsi_id, | |
1986 | struct scsi_cmnd *SCpnt, | |
1987 | void (*done)(struct scsi_cmnd *)) | |
1988 | { | |
1989 | unchar *cmd = (unchar *) SCpnt->cmnd; | |
1990 | unsigned int request_bufflen = SCpnt->request_bufflen; | |
1991 | struct sbp2_command_info *command; | |
1992 | ||
1993 | SBP2_DEBUG("sbp2_send_command"); | |
1994 | #if (CONFIG_IEEE1394_SBP2_DEBUG >= 2) || defined(CONFIG_IEEE1394_SBP2_PACKET_DUMP) | |
1995 | printk("[scsi command]\n "); | |
1996 | scsi_print_command(SCpnt); | |
1997 | #endif | |
1998 | SBP2_DEBUG("SCSI transfer size = %x", request_bufflen); | |
1999 | SBP2_DEBUG("SCSI s/g elements = %x", (unsigned int)SCpnt->use_sg); | |
2000 | ||
2001 | /* | |
2002 | * Allocate a command orb and s/g structure | |
2003 | */ | |
2004 | command = sbp2util_allocate_command_orb(scsi_id, SCpnt, done); | |
2005 | if (!command) { | |
a237f35f | 2006 | return -EIO; |
1da177e4 LT |
2007 | } |
2008 | ||
2009 | /* | |
2010 | * The scsi stack sends down a request_bufflen which does not match the | |
2011 | * length field in the scsi cdb. This causes some sbp2 devices to | |
2012 | * reject this inquiry command. Fix the request_bufflen. | |
2013 | */ | |
2014 | if (*cmd == INQUIRY) { | |
2015 | if (force_inquiry_hack || scsi_id->workarounds & SBP2_BREAKAGE_INQUIRY_HACK) | |
2016 | request_bufflen = cmd[4] = 0x24; | |
2017 | else | |
2018 | request_bufflen = cmd[4]; | |
2019 | } | |
2020 | ||
2021 | /* | |
2022 | * Now actually fill in the comamnd orb and sbp2 s/g list | |
2023 | */ | |
2024 | sbp2_create_command_orb(scsi_id, command, cmd, SCpnt->use_sg, | |
2025 | request_bufflen, SCpnt->request_buffer, | |
2026 | SCpnt->sc_data_direction); | |
1da177e4 LT |
2027 | |
2028 | sbp2util_packet_dump(&command->command_orb, sizeof(struct sbp2_command_orb), | |
2029 | "sbp2 command orb", command->command_orb_dma); | |
2030 | ||
2031 | /* | |
2032 | * Initialize status fifo | |
2033 | */ | |
2034 | memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); | |
2035 | ||
2036 | /* | |
2037 | * Link up the orb, and ring the doorbell if needed | |
2038 | */ | |
2039 | sbp2_link_orb_command(scsi_id, command); | |
2040 | ||
a237f35f | 2041 | return 0; |
1da177e4 LT |
2042 | } |
2043 | ||
1da177e4 LT |
2044 | /* |
2045 | * Translates SBP-2 status into SCSI sense data for check conditions | |
2046 | */ | |
2047 | static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, unchar *sense_data) | |
2048 | { | |
2049 | SBP2_DEBUG("sbp2_status_to_sense_data"); | |
2050 | ||
2051 | /* | |
2052 | * Ok, it's pretty ugly... ;-) | |
2053 | */ | |
2054 | sense_data[0] = 0x70; | |
2055 | sense_data[1] = 0x0; | |
2056 | sense_data[2] = sbp2_status[9]; | |
2057 | sense_data[3] = sbp2_status[12]; | |
2058 | sense_data[4] = sbp2_status[13]; | |
2059 | sense_data[5] = sbp2_status[14]; | |
2060 | sense_data[6] = sbp2_status[15]; | |
2061 | sense_data[7] = 10; | |
2062 | sense_data[8] = sbp2_status[16]; | |
2063 | sense_data[9] = sbp2_status[17]; | |
2064 | sense_data[10] = sbp2_status[18]; | |
2065 | sense_data[11] = sbp2_status[19]; | |
2066 | sense_data[12] = sbp2_status[10]; | |
2067 | sense_data[13] = sbp2_status[11]; | |
2068 | sense_data[14] = sbp2_status[20]; | |
2069 | sense_data[15] = sbp2_status[21]; | |
2070 | ||
a237f35f | 2071 | return sbp2_status[8] & 0x3f; /* return scsi status */ |
1da177e4 LT |
2072 | } |
2073 | ||
2074 | /* | |
2075 | * This function is called after a command is completed, in order to do any necessary SBP-2 | |
2076 | * response data translations for the SCSI stack | |
2077 | */ | |
a237f35f | 2078 | static void sbp2_check_sbp2_response(struct scsi_id_instance_data *scsi_id, |
1da177e4 LT |
2079 | struct scsi_cmnd *SCpnt) |
2080 | { | |
2081 | u8 *scsi_buf = SCpnt->request_buffer; | |
1da177e4 LT |
2082 | |
2083 | SBP2_DEBUG("sbp2_check_sbp2_response"); | |
2084 | ||
e30809fd | 2085 | if (SCpnt->cmnd[0] == INQUIRY && (SCpnt->cmnd[1] & 3) == 0) { |
a237f35f SR |
2086 | /* |
2087 | * Make sure data length is ok. Minimum length is 36 bytes | |
2088 | */ | |
2089 | if (scsi_buf[4] == 0) { | |
2090 | scsi_buf[4] = 36 - 5; | |
2091 | } | |
1da177e4 | 2092 | |
a237f35f SR |
2093 | /* |
2094 | * Fix ansi revision and response data format | |
2095 | */ | |
2096 | scsi_buf[2] |= 2; | |
2097 | scsi_buf[3] = (scsi_buf[3] & 0xf0) | 2; | |
1da177e4 | 2098 | } |
1da177e4 LT |
2099 | } |
2100 | ||
2101 | /* | |
2102 | * This function deals with status writes from the SBP-2 device | |
2103 | */ | |
2104 | static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, int destid, | |
2105 | quadlet_t *data, u64 addr, size_t length, u16 fl) | |
2106 | { | |
2107 | struct sbp2scsi_host_info *hi; | |
2108 | struct scsi_id_instance_data *scsi_id = NULL, *scsi_id_tmp; | |
2109 | u32 id; | |
2110 | struct scsi_cmnd *SCpnt = NULL; | |
2111 | u32 scsi_status = SBP2_SCSI_STATUS_GOOD; | |
2112 | struct sbp2_command_info *command; | |
79456197 | 2113 | unsigned long flags; |
1da177e4 LT |
2114 | |
2115 | SBP2_DEBUG("sbp2_handle_status_write"); | |
2116 | ||
2117 | sbp2util_packet_dump(data, length, "sbp2 status write by device", (u32)addr); | |
2118 | ||
2119 | if (!host) { | |
2120 | SBP2_ERR("host is NULL - this is bad!"); | |
a237f35f | 2121 | return RCODE_ADDRESS_ERROR; |
1da177e4 LT |
2122 | } |
2123 | ||
2124 | hi = hpsb_get_hostinfo(&sbp2_highlevel, host); | |
2125 | ||
2126 | if (!hi) { | |
2127 | SBP2_ERR("host info is NULL - this is bad!"); | |
a237f35f | 2128 | return RCODE_ADDRESS_ERROR; |
1da177e4 LT |
2129 | } |
2130 | ||
2131 | /* | |
2132 | * Find our scsi_id structure by looking at the status fifo address written to by | |
2133 | * the sbp2 device. | |
2134 | */ | |
2135 | id = SBP2_STATUS_FIFO_OFFSET_TO_ENTRY((u32)(addr - SBP2_STATUS_FIFO_ADDRESS)); | |
2136 | list_for_each_entry(scsi_id_tmp, &hi->scsi_ids, scsi_list) { | |
2137 | if (scsi_id_tmp->ne->nodeid == nodeid && scsi_id_tmp->ud->id == id) { | |
2138 | scsi_id = scsi_id_tmp; | |
2139 | break; | |
2140 | } | |
2141 | } | |
2142 | ||
2143 | if (!scsi_id) { | |
2144 | SBP2_ERR("scsi_id is NULL - device is gone?"); | |
a237f35f | 2145 | return RCODE_ADDRESS_ERROR; |
1da177e4 LT |
2146 | } |
2147 | ||
2148 | /* | |
2149 | * Put response into scsi_id status fifo... | |
2150 | */ | |
2151 | memcpy(&scsi_id->status_block, data, length); | |
2152 | ||
2153 | /* | |
2154 | * Byte swap first two quadlets (8 bytes) of status for processing | |
2155 | */ | |
2156 | sbp2util_be32_to_cpu_buffer(&scsi_id->status_block, 8); | |
2157 | ||
2158 | /* | |
2159 | * Handle command ORB status here if necessary. First, need to match status with command. | |
2160 | */ | |
2161 | command = sbp2util_find_command_for_orb(scsi_id, scsi_id->status_block.ORB_offset_lo); | |
2162 | if (command) { | |
2163 | ||
2164 | SBP2_DEBUG("Found status for command ORB"); | |
2165 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma, | |
2166 | sizeof(struct sbp2_command_orb), | |
2167 | PCI_DMA_BIDIRECTIONAL); | |
2168 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma, | |
2169 | sizeof(command->scatter_gather_element), | |
2170 | PCI_DMA_BIDIRECTIONAL); | |
2171 | ||
2172 | SBP2_ORB_DEBUG("matched command orb %p", &command->command_orb); | |
2173 | outstanding_orb_decr; | |
2174 | ||
2175 | /* | |
2176 | * Matched status with command, now grab scsi command pointers and check status | |
2177 | */ | |
2178 | SCpnt = command->Current_SCpnt; | |
2179 | sbp2util_mark_command_completed(scsi_id, command); | |
2180 | ||
2181 | if (SCpnt) { | |
2182 | ||
2183 | /* | |
2184 | * See if the target stored any scsi status information | |
2185 | */ | |
2186 | if (STATUS_GET_LENGTH(scsi_id->status_block.ORB_offset_hi_misc) > 1) { | |
2187 | /* | |
2188 | * Translate SBP-2 status to SCSI sense data | |
2189 | */ | |
2190 | SBP2_DEBUG("CHECK CONDITION"); | |
2191 | scsi_status = sbp2_status_to_sense_data((unchar *)&scsi_id->status_block, SCpnt->sense_buffer); | |
2192 | } | |
2193 | ||
2194 | /* | |
2195 | * Check to see if the dead bit is set. If so, we'll have to initiate | |
2196 | * a fetch agent reset. | |
2197 | */ | |
2198 | if (STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc)) { | |
2199 | ||
2200 | /* | |
2201 | * Initiate a fetch agent reset. | |
2202 | */ | |
2203 | SBP2_DEBUG("Dead bit set - initiating fetch agent reset"); | |
2204 | sbp2_agent_reset(scsi_id, 0); | |
2205 | } | |
2206 | ||
2207 | SBP2_ORB_DEBUG("completing command orb %p", &command->command_orb); | |
2208 | } | |
2209 | ||
2210 | /* | |
2211 | * Check here to see if there are no commands in-use. If there are none, we can | |
2212 | * null out last orb so that next time around we write directly to the orb pointer... | |
2213 | * Quick start saves one 1394 bus transaction. | |
2214 | */ | |
79456197 | 2215 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2216 | if (list_empty(&scsi_id->sbp2_command_orb_inuse)) { |
2217 | scsi_id->last_orb = NULL; | |
2218 | } | |
79456197 | 2219 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2220 | |
2221 | } else { | |
2222 | ||
2223 | /* | |
2224 | * It's probably a login/logout/reconnect status. | |
2225 | */ | |
2226 | if ((scsi_id->login_orb_dma == scsi_id->status_block.ORB_offset_lo) || | |
2227 | (scsi_id->query_logins_orb_dma == scsi_id->status_block.ORB_offset_lo) || | |
2228 | (scsi_id->reconnect_orb_dma == scsi_id->status_block.ORB_offset_lo) || | |
2229 | (scsi_id->logout_orb_dma == scsi_id->status_block.ORB_offset_lo)) { | |
2230 | atomic_set(&scsi_id->sbp2_login_complete, 1); | |
2231 | } | |
2232 | } | |
2233 | ||
2234 | if (SCpnt) { | |
2235 | ||
2236 | /* Complete the SCSI command. */ | |
2237 | SBP2_DEBUG("Completing SCSI command"); | |
2238 | sbp2scsi_complete_command(scsi_id, scsi_status, SCpnt, | |
2239 | command->Current_done); | |
2240 | SBP2_ORB_DEBUG("command orb completed"); | |
2241 | } | |
2242 | ||
a237f35f | 2243 | return RCODE_COMPLETE; |
1da177e4 LT |
2244 | } |
2245 | ||
1da177e4 LT |
2246 | /************************************** |
2247 | * SCSI interface related section | |
2248 | **************************************/ | |
2249 | ||
2250 | /* | |
2251 | * This routine is the main request entry routine for doing I/O. It is | |
2252 | * called from the scsi stack directly. | |
2253 | */ | |
2254 | static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt, | |
2255 | void (*done)(struct scsi_cmnd *)) | |
2256 | { | |
2257 | struct scsi_id_instance_data *scsi_id = | |
2258 | (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; | |
2259 | struct sbp2scsi_host_info *hi; | |
abd559b1 | 2260 | int result = DID_NO_CONNECT << 16; |
1da177e4 LT |
2261 | |
2262 | SBP2_DEBUG("sbp2scsi_queuecommand"); | |
2263 | ||
abd559b1 JM |
2264 | if (!sbp2util_node_is_available(scsi_id)) |
2265 | goto done; | |
1da177e4 LT |
2266 | |
2267 | hi = scsi_id->hi; | |
2268 | ||
2269 | if (!hi) { | |
2270 | SBP2_ERR("sbp2scsi_host_info is NULL - this is bad!"); | |
abd559b1 | 2271 | goto done; |
1da177e4 LT |
2272 | } |
2273 | ||
2274 | /* | |
2275 | * Until we handle multiple luns, just return selection time-out | |
2276 | * to any IO directed at non-zero LUNs | |
2277 | */ | |
abd559b1 JM |
2278 | if (SCpnt->device->lun) |
2279 | goto done; | |
1da177e4 LT |
2280 | |
2281 | /* | |
2282 | * Check for request sense command, and handle it here | |
2283 | * (autorequest sense) | |
2284 | */ | |
2285 | if (SCpnt->cmnd[0] == REQUEST_SENSE) { | |
2286 | SBP2_DEBUG("REQUEST_SENSE"); | |
2287 | memcpy(SCpnt->request_buffer, SCpnt->sense_buffer, SCpnt->request_bufflen); | |
2288 | memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer)); | |
2289 | sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_GOOD, SCpnt, done); | |
abd559b1 | 2290 | return 0; |
1da177e4 LT |
2291 | } |
2292 | ||
2293 | /* | |
2294 | * Check to see if we are in the middle of a bus reset. | |
2295 | */ | |
2296 | if (!hpsb_node_entry_valid(scsi_id->ne)) { | |
2297 | SBP2_ERR("Bus reset in progress - rejecting command"); | |
abd559b1 JM |
2298 | result = DID_BUS_BUSY << 16; |
2299 | goto done; | |
1da177e4 LT |
2300 | } |
2301 | ||
43863eba SR |
2302 | /* |
2303 | * Bidirectional commands are not yet implemented, | |
2304 | * and unknown transfer direction not handled. | |
2305 | */ | |
2306 | if (SCpnt->sc_data_direction == DMA_BIDIRECTIONAL) { | |
2307 | SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command"); | |
2308 | result = DID_ERROR << 16; | |
2309 | goto done; | |
2310 | } | |
2311 | ||
1da177e4 LT |
2312 | /* |
2313 | * Try and send our SCSI command | |
2314 | */ | |
2315 | if (sbp2_send_command(scsi_id, SCpnt, done)) { | |
2316 | SBP2_ERR("Error sending SCSI command"); | |
2317 | sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_SELECTION_TIMEOUT, | |
2318 | SCpnt, done); | |
2319 | } | |
abd559b1 | 2320 | return 0; |
1da177e4 | 2321 | |
abd559b1 JM |
2322 | done: |
2323 | SCpnt->result = result; | |
2324 | done(SCpnt); | |
2325 | return 0; | |
1da177e4 LT |
2326 | } |
2327 | ||
2328 | /* | |
2329 | * This function is called in order to complete all outstanding SBP-2 | |
2330 | * commands (in case of resets, etc.). | |
2331 | */ | |
2332 | static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id, | |
2333 | u32 status) | |
2334 | { | |
2335 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
2336 | struct list_head *lh; | |
2337 | struct sbp2_command_info *command; | |
79456197 | 2338 | unsigned long flags; |
1da177e4 LT |
2339 | |
2340 | SBP2_DEBUG("sbp2scsi_complete_all_commands"); | |
2341 | ||
79456197 | 2342 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2343 | while (!list_empty(&scsi_id->sbp2_command_orb_inuse)) { |
2344 | SBP2_DEBUG("Found pending command to complete"); | |
2345 | lh = scsi_id->sbp2_command_orb_inuse.next; | |
2346 | command = list_entry(lh, struct sbp2_command_info, list); | |
2347 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma, | |
2348 | sizeof(struct sbp2_command_orb), | |
2349 | PCI_DMA_BIDIRECTIONAL); | |
2350 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma, | |
2351 | sizeof(command->scatter_gather_element), | |
2352 | PCI_DMA_BIDIRECTIONAL); | |
2353 | sbp2util_mark_command_completed(scsi_id, command); | |
2354 | if (command->Current_SCpnt) { | |
2355 | command->Current_SCpnt->result = status << 16; | |
2356 | command->Current_done(command->Current_SCpnt); | |
2357 | } | |
2358 | } | |
79456197 | 2359 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2360 | |
2361 | return; | |
2362 | } | |
2363 | ||
2364 | /* | |
2365 | * This function is called in order to complete a regular SBP-2 command. | |
2366 | * | |
2367 | * This can be called in interrupt context. | |
2368 | */ | |
2369 | static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id, | |
2370 | u32 scsi_status, struct scsi_cmnd *SCpnt, | |
2371 | void (*done)(struct scsi_cmnd *)) | |
2372 | { | |
1da177e4 LT |
2373 | SBP2_DEBUG("sbp2scsi_complete_command"); |
2374 | ||
2375 | /* | |
2376 | * Sanity | |
2377 | */ | |
2378 | if (!SCpnt) { | |
2379 | SBP2_ERR("SCpnt is NULL"); | |
2380 | return; | |
2381 | } | |
2382 | ||
2383 | /* | |
2384 | * If a bus reset is in progress and there was an error, don't | |
2385 | * complete the command, just let it get retried at the end of the | |
2386 | * bus reset. | |
2387 | */ | |
a237f35f SR |
2388 | if (!hpsb_node_entry_valid(scsi_id->ne) |
2389 | && (scsi_status != SBP2_SCSI_STATUS_GOOD)) { | |
1da177e4 LT |
2390 | SBP2_ERR("Bus reset in progress - retry command later"); |
2391 | return; | |
2392 | } | |
a237f35f | 2393 | |
1da177e4 LT |
2394 | /* |
2395 | * Switch on scsi status | |
2396 | */ | |
2397 | switch (scsi_status) { | |
a237f35f SR |
2398 | case SBP2_SCSI_STATUS_GOOD: |
2399 | SCpnt->result = DID_OK; | |
2400 | break; | |
1da177e4 | 2401 | |
a237f35f SR |
2402 | case SBP2_SCSI_STATUS_BUSY: |
2403 | SBP2_ERR("SBP2_SCSI_STATUS_BUSY"); | |
2404 | SCpnt->result = DID_BUS_BUSY << 16; | |
2405 | break; | |
1da177e4 | 2406 | |
a237f35f SR |
2407 | case SBP2_SCSI_STATUS_CHECK_CONDITION: |
2408 | SBP2_DEBUG("SBP2_SCSI_STATUS_CHECK_CONDITION"); | |
2409 | SCpnt->result = CHECK_CONDITION << 1; | |
1da177e4 | 2410 | |
a237f35f SR |
2411 | /* |
2412 | * Debug stuff | |
2413 | */ | |
1da177e4 | 2414 | #if CONFIG_IEEE1394_SBP2_DEBUG >= 1 |
a237f35f SR |
2415 | scsi_print_command(SCpnt); |
2416 | scsi_print_sense("bh", SCpnt); | |
1da177e4 LT |
2417 | #endif |
2418 | ||
a237f35f | 2419 | break; |
1da177e4 | 2420 | |
a237f35f SR |
2421 | case SBP2_SCSI_STATUS_SELECTION_TIMEOUT: |
2422 | SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT"); | |
2423 | SCpnt->result = DID_NO_CONNECT << 16; | |
2424 | scsi_print_command(SCpnt); | |
2425 | break; | |
1da177e4 | 2426 | |
a237f35f SR |
2427 | case SBP2_SCSI_STATUS_CONDITION_MET: |
2428 | case SBP2_SCSI_STATUS_RESERVATION_CONFLICT: | |
2429 | case SBP2_SCSI_STATUS_COMMAND_TERMINATED: | |
2430 | SBP2_ERR("Bad SCSI status = %x", scsi_status); | |
2431 | SCpnt->result = DID_ERROR << 16; | |
2432 | scsi_print_command(SCpnt); | |
2433 | break; | |
1da177e4 | 2434 | |
a237f35f SR |
2435 | default: |
2436 | SBP2_ERR("Unsupported SCSI status = %x", scsi_status); | |
2437 | SCpnt->result = DID_ERROR << 16; | |
1da177e4 LT |
2438 | } |
2439 | ||
2440 | /* | |
2441 | * Take care of any sbp2 response data mucking here (RBC stuff, etc.) | |
2442 | */ | |
2443 | if (SCpnt->result == DID_OK) { | |
2444 | sbp2_check_sbp2_response(scsi_id, SCpnt); | |
2445 | } | |
2446 | ||
2447 | /* | |
2448 | * If a bus reset is in progress and there was an error, complete | |
2449 | * the command as busy so that it will get retried. | |
2450 | */ | |
a237f35f SR |
2451 | if (!hpsb_node_entry_valid(scsi_id->ne) |
2452 | && (scsi_status != SBP2_SCSI_STATUS_GOOD)) { | |
1da177e4 LT |
2453 | SBP2_ERR("Completing command with busy (bus reset)"); |
2454 | SCpnt->result = DID_BUS_BUSY << 16; | |
2455 | } | |
2456 | ||
2457 | /* | |
2458 | * If a unit attention occurs, return busy status so it gets | |
2459 | * retried... it could have happened because of a 1394 bus reset | |
2460 | * or hot-plug... | |
2461 | */ | |
2462 | #if 0 | |
2463 | if ((scsi_status == SBP2_SCSI_STATUS_CHECK_CONDITION) && | |
2464 | (SCpnt->sense_buffer[2] == UNIT_ATTENTION)) { | |
2465 | SBP2_DEBUG("UNIT ATTENTION - return busy"); | |
2466 | SCpnt->result = DID_BUS_BUSY << 16; | |
2467 | } | |
2468 | #endif | |
2469 | ||
2470 | /* | |
2471 | * Tell scsi stack that we're done with this command | |
2472 | */ | |
a237f35f | 2473 | done(SCpnt); |
1da177e4 LT |
2474 | } |
2475 | ||
abd559b1 | 2476 | static int sbp2scsi_slave_alloc(struct scsi_device *sdev) |
1da177e4 | 2477 | { |
abd559b1 JM |
2478 | ((struct scsi_id_instance_data *)sdev->host->hostdata[0])->sdev = sdev; |
2479 | return 0; | |
2480 | } | |
2481 | ||
abd559b1 JM |
2482 | static int sbp2scsi_slave_configure(struct scsi_device *sdev) |
2483 | { | |
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; | |
1da177e4 LT |
2487 | return 0; |
2488 | } | |
2489 | ||
abd559b1 JM |
2490 | static void sbp2scsi_slave_destroy(struct scsi_device *sdev) |
2491 | { | |
2492 | ((struct scsi_id_instance_data *)sdev->host->hostdata[0])->sdev = NULL; | |
2493 | return; | |
2494 | } | |
2495 | ||
1da177e4 LT |
2496 | /* |
2497 | * Called by scsi stack when something has really gone wrong. Usually | |
2498 | * called when a command has timed-out for some reason. | |
2499 | */ | |
2500 | static int sbp2scsi_abort(struct scsi_cmnd *SCpnt) | |
2501 | { | |
2502 | struct scsi_id_instance_data *scsi_id = | |
2503 | (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; | |
2504 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
2505 | struct sbp2_command_info *command; | |
2506 | ||
2507 | SBP2_ERR("aborting sbp2 command"); | |
2508 | scsi_print_command(SCpnt); | |
2509 | ||
abd559b1 | 2510 | if (sbp2util_node_is_available(scsi_id)) { |
1da177e4 LT |
2511 | |
2512 | /* | |
2513 | * Right now, just return any matching command structures | |
2514 | * to the free pool. | |
2515 | */ | |
2516 | command = sbp2util_find_command_for_SCpnt(scsi_id, SCpnt); | |
2517 | if (command) { | |
2518 | SBP2_DEBUG("Found command to abort"); | |
2519 | pci_dma_sync_single_for_cpu(hi->host->pdev, | |
2520 | command->command_orb_dma, | |
2521 | sizeof(struct sbp2_command_orb), | |
2522 | PCI_DMA_BIDIRECTIONAL); | |
2523 | pci_dma_sync_single_for_cpu(hi->host->pdev, | |
2524 | command->sge_dma, | |
2525 | sizeof(command->scatter_gather_element), | |
2526 | PCI_DMA_BIDIRECTIONAL); | |
2527 | sbp2util_mark_command_completed(scsi_id, command); | |
2528 | if (command->Current_SCpnt) { | |
2529 | command->Current_SCpnt->result = DID_ABORT << 16; | |
2530 | command->Current_done(command->Current_SCpnt); | |
2531 | } | |
2532 | } | |
2533 | ||
2534 | /* | |
2535 | * Initiate a fetch agent reset. | |
2536 | */ | |
2537 | sbp2_agent_reset(scsi_id, 0); | |
2538 | sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY); | |
2539 | } | |
2540 | ||
a237f35f | 2541 | return SUCCESS; |
1da177e4 LT |
2542 | } |
2543 | ||
2544 | /* | |
2545 | * Called by scsi stack when something has really gone wrong. | |
2546 | */ | |
abd559b1 | 2547 | static int sbp2scsi_reset(struct scsi_cmnd *SCpnt) |
1da177e4 LT |
2548 | { |
2549 | struct scsi_id_instance_data *scsi_id = | |
2550 | (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; | |
2551 | ||
2552 | SBP2_ERR("reset requested"); | |
2553 | ||
abd559b1 | 2554 | if (sbp2util_node_is_available(scsi_id)) { |
1da177e4 LT |
2555 | SBP2_ERR("Generating sbp2 fetch agent reset"); |
2556 | sbp2_agent_reset(scsi_id, 0); | |
2557 | } | |
2558 | ||
abd559b1 | 2559 | return SUCCESS; |
94d0e7b8 JG |
2560 | } |
2561 | ||
a237f35f SR |
2562 | static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev, |
2563 | struct device_attribute *attr, | |
2564 | char *buf) | |
1da177e4 LT |
2565 | { |
2566 | struct scsi_device *sdev; | |
2567 | struct scsi_id_instance_data *scsi_id; | |
2568 | int lun; | |
2569 | ||
2570 | if (!(sdev = to_scsi_device(dev))) | |
2571 | return 0; | |
2572 | ||
2573 | if (!(scsi_id = (struct scsi_id_instance_data *)sdev->host->hostdata[0])) | |
2574 | return 0; | |
2575 | ||
e309fc6d | 2576 | lun = ORB_SET_LUN(scsi_id->sbp2_lun); |
1da177e4 LT |
2577 | |
2578 | return sprintf(buf, "%016Lx:%d:%d\n", (unsigned long long)scsi_id->ne->guid, | |
2579 | scsi_id->ud->id, lun); | |
2580 | } | |
2581 | static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); | |
2582 | ||
2583 | static struct device_attribute *sbp2_sysfs_sdev_attrs[] = { | |
2584 | &dev_attr_ieee1394_id, | |
2585 | NULL | |
2586 | }; | |
2587 | ||
2588 | MODULE_AUTHOR("Ben Collins <bcollins@debian.org>"); | |
2589 | MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver"); | |
2590 | MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME); | |
2591 | MODULE_LICENSE("GPL"); | |
2592 | ||
2593 | /* SCSI host template */ | |
2594 | static struct scsi_host_template scsi_driver_template = { | |
2595 | .module = THIS_MODULE, | |
2596 | .name = "SBP-2 IEEE-1394", | |
2597 | .proc_name = SBP2_DEVICE_NAME, | |
1da177e4 LT |
2598 | .queuecommand = sbp2scsi_queuecommand, |
2599 | .eh_abort_handler = sbp2scsi_abort, | |
2600 | .eh_device_reset_handler = sbp2scsi_reset, | |
abd559b1 | 2601 | .slave_alloc = sbp2scsi_slave_alloc, |
1da177e4 | 2602 | .slave_configure = sbp2scsi_slave_configure, |
abd559b1 | 2603 | .slave_destroy = sbp2scsi_slave_destroy, |
1da177e4 LT |
2604 | .this_id = -1, |
2605 | .sg_tablesize = SG_ALL, | |
2606 | .use_clustering = ENABLE_CLUSTERING, | |
2607 | .cmd_per_lun = SBP2_MAX_CMDS, | |
2608 | .can_queue = SBP2_MAX_CMDS, | |
2609 | .emulated = 1, | |
2610 | .sdev_attrs = sbp2_sysfs_sdev_attrs, | |
2611 | }; | |
2612 | ||
2613 | static int sbp2_module_init(void) | |
2614 | { | |
2615 | int ret; | |
2616 | ||
2617 | SBP2_DEBUG("sbp2_module_init"); | |
2618 | ||
1da177e4 LT |
2619 | /* Module load debug option to force one command at a time (serializing I/O) */ |
2620 | if (serialize_io) { | |
2bab359a JM |
2621 | SBP2_INFO("Driver forced to serialize I/O (serialize_io=1)"); |
2622 | SBP2_INFO("Try serialize_io=0 for better performance"); | |
1da177e4 LT |
2623 | scsi_driver_template.can_queue = 1; |
2624 | scsi_driver_template.cmd_per_lun = 1; | |
2625 | } | |
2626 | ||
2627 | /* Set max sectors (module load option). Default is 255 sectors. */ | |
2628 | scsi_driver_template.max_sectors = max_sectors; | |
2629 | ||
1da177e4 LT |
2630 | /* Register our high level driver with 1394 stack */ |
2631 | hpsb_register_highlevel(&sbp2_highlevel); | |
2632 | ||
2633 | ret = hpsb_register_protocol(&sbp2_driver); | |
2634 | if (ret) { | |
2635 | SBP2_ERR("Failed to register protocol"); | |
2636 | hpsb_unregister_highlevel(&sbp2_highlevel); | |
2637 | return ret; | |
2638 | } | |
2639 | ||
2640 | return 0; | |
2641 | } | |
2642 | ||
2643 | static void __exit sbp2_module_exit(void) | |
2644 | { | |
2645 | SBP2_DEBUG("sbp2_module_exit"); | |
2646 | ||
2647 | hpsb_unregister_protocol(&sbp2_driver); | |
2648 | ||
2649 | hpsb_unregister_highlevel(&sbp2_highlevel); | |
2650 | } | |
2651 | ||
2652 | module_init(sbp2_module_init); | |
2653 | module_exit(sbp2_module_exit); |