Commit | Line | Data |
---|---|---|
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 | ||
83 | static char version[] __devinitdata = | |
84 | "$Rev: 1219 $ Ben Collins <bcollins@debian.org>"; | |
85 | ||
86 | /* | |
87 | * Module load parameter definitions | |
88 | */ | |
89 | ||
90 | /* | |
91 | * Change max_speed on module load if you have a bad IEEE-1394 | |
92 | * controller that has trouble running 2KB packets at 400mb. | |
93 | * | |
94 | * NOTE: On certain OHCI parts I have seen short packets on async transmit | |
95 | * (probably due to PCI latency/throughput issues with the part). You can | |
96 | * bump down the speed if you are running into problems. | |
97 | */ | |
98 | static int max_speed = IEEE1394_SPEED_MAX; | |
99 | module_param(max_speed, int, 0644); | |
100 | MODULE_PARM_DESC(max_speed, "Force max speed (3 = 800mb, 2 = 400mb default, 1 = 200mb, 0 = 100mb)"); | |
101 | ||
102 | /* | |
103 | * Set serialize_io to 1 if you'd like only one scsi command sent | |
104 | * down to us at a time (debugging). This might be necessary for very | |
105 | * badly behaved sbp2 devices. | |
106 | */ | |
107 | static int serialize_io = 0; | |
108 | module_param(serialize_io, int, 0444); | |
109 | MODULE_PARM_DESC(serialize_io, "Serialize all I/O coming down from the scsi drivers (default = 0)"); | |
110 | ||
111 | /* | |
112 | * Bump up max_sectors if you'd like to support very large sized | |
113 | * transfers. Please note that some older sbp2 bridge chips are broken for | |
114 | * transfers greater or equal to 128KB. Default is a value of 255 | |
115 | * sectors, or just under 128KB (at 512 byte sector size). I can note that | |
116 | * the Oxsemi sbp2 chipsets have no problems supporting very large | |
117 | * transfer sizes. | |
118 | */ | |
119 | static int max_sectors = SBP2_MAX_SECTORS; | |
120 | module_param(max_sectors, int, 0444); | |
121 | MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported (default = 255)"); | |
122 | ||
123 | /* | |
124 | * Exclusive login to sbp2 device? In most cases, the sbp2 driver should | |
125 | * do an exclusive login, as it's generally unsafe to have two hosts | |
126 | * talking to a single sbp2 device at the same time (filesystem coherency, | |
127 | * etc.). If you're running an sbp2 device that supports multiple logins, | |
128 | * and you're either running read-only filesystems or some sort of special | |
129 | * filesystem supporting multiple hosts (one such filesystem is OpenGFS, | |
130 | * see opengfs.sourceforge.net for more info), then set exclusive_login | |
131 | * to zero. Note: The Oxsemi OXFW911 sbp2 chipset supports up to four | |
132 | * concurrent logins. | |
133 | */ | |
134 | static int exclusive_login = 1; | |
135 | module_param(exclusive_login, int, 0644); | |
136 | MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device (default = 1)"); | |
137 | ||
138 | /* | |
139 | * SCSI inquiry hack for really badly behaved sbp2 devices. Turn this on | |
140 | * if your sbp2 device is not properly handling the SCSI inquiry command. | |
141 | * This hack makes the inquiry look more like a typical MS Windows | |
142 | * inquiry. | |
143 | * | |
144 | * If force_inquiry_hack=1 is required for your device to work, | |
145 | * please submit the logged sbp2_firmware_revision value of this device to | |
146 | * the linux1394-devel mailing list. | |
147 | */ | |
148 | static int force_inquiry_hack = 0; | |
149 | module_param(force_inquiry_hack, int, 0444); | |
150 | MODULE_PARM_DESC(force_inquiry_hack, "Force SCSI inquiry hack (default = 0)"); | |
151 | ||
152 | ||
153 | /* | |
154 | * Export information about protocols/devices supported by this driver. | |
155 | */ | |
156 | static struct ieee1394_device_id sbp2_id_table[] = { | |
157 | { | |
158 | .match_flags =IEEE1394_MATCH_SPECIFIER_ID | | |
159 | IEEE1394_MATCH_VERSION, | |
160 | .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff, | |
161 | .version = SBP2_SW_VERSION_ENTRY & 0xffffff | |
162 | }, | |
163 | { } | |
164 | }; | |
165 | ||
166 | MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); | |
167 | ||
168 | /* | |
169 | * Debug levels, configured via kernel config, or enable here. | |
170 | */ | |
171 | ||
172 | /* #define CONFIG_IEEE1394_SBP2_DEBUG_ORBS */ | |
173 | /* #define CONFIG_IEEE1394_SBP2_DEBUG_DMA */ | |
174 | /* #define CONFIG_IEEE1394_SBP2_DEBUG 1 */ | |
175 | /* #define CONFIG_IEEE1394_SBP2_DEBUG 2 */ | |
176 | /* #define CONFIG_IEEE1394_SBP2_PACKET_DUMP */ | |
177 | ||
178 | #ifdef CONFIG_IEEE1394_SBP2_DEBUG_ORBS | |
179 | #define SBP2_ORB_DEBUG(fmt, args...) HPSB_ERR("sbp2(%s): "fmt, __FUNCTION__, ## args) | |
180 | static u32 global_outstanding_command_orbs = 0; | |
181 | #define outstanding_orb_incr global_outstanding_command_orbs++ | |
182 | #define outstanding_orb_decr global_outstanding_command_orbs-- | |
183 | #else | |
184 | #define SBP2_ORB_DEBUG(fmt, args...) | |
185 | #define outstanding_orb_incr | |
186 | #define outstanding_orb_decr | |
187 | #endif | |
188 | ||
189 | #ifdef CONFIG_IEEE1394_SBP2_DEBUG_DMA | |
190 | #define SBP2_DMA_ALLOC(fmt, args...) \ | |
191 | HPSB_ERR("sbp2(%s)alloc(%d): "fmt, __FUNCTION__, \ | |
192 | ++global_outstanding_dmas, ## args) | |
193 | #define SBP2_DMA_FREE(fmt, args...) \ | |
194 | HPSB_ERR("sbp2(%s)free(%d): "fmt, __FUNCTION__, \ | |
195 | --global_outstanding_dmas, ## args) | |
196 | static u32 global_outstanding_dmas = 0; | |
197 | #else | |
198 | #define SBP2_DMA_ALLOC(fmt, args...) | |
199 | #define SBP2_DMA_FREE(fmt, args...) | |
200 | #endif | |
201 | ||
202 | #if CONFIG_IEEE1394_SBP2_DEBUG >= 2 | |
203 | #define SBP2_DEBUG(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
204 | #define SBP2_INFO(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
205 | #define SBP2_NOTICE(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
206 | #define SBP2_WARN(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
207 | #elif CONFIG_IEEE1394_SBP2_DEBUG == 1 | |
208 | #define SBP2_DEBUG(fmt, args...) HPSB_DEBUG("sbp2: "fmt, ## args) | |
209 | #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args) | |
210 | #define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args) | |
211 | #define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args) | |
212 | #else | |
213 | #define SBP2_DEBUG(fmt, args...) | |
214 | #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args) | |
215 | #define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args) | |
216 | #define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args) | |
217 | #endif | |
218 | ||
219 | #define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
220 | ||
221 | ||
222 | /* | |
223 | * Globals | |
224 | */ | |
225 | ||
226 | static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id, | |
227 | u32 status); | |
228 | ||
229 | static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id, | |
230 | u32 scsi_status, struct scsi_cmnd *SCpnt, | |
231 | void (*done)(struct scsi_cmnd *)); | |
232 | ||
233 | static struct scsi_host_template scsi_driver_template; | |
234 | ||
235 | static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC }; | |
236 | ||
237 | static void sbp2_host_reset(struct hpsb_host *host); | |
238 | ||
239 | static int sbp2_probe(struct device *dev); | |
240 | static int sbp2_remove(struct device *dev); | |
241 | static int sbp2_update(struct unit_directory *ud); | |
242 | ||
243 | static struct hpsb_highlevel sbp2_highlevel = { | |
244 | .name = SBP2_DEVICE_NAME, | |
245 | .host_reset = sbp2_host_reset, | |
246 | }; | |
247 | ||
248 | static struct hpsb_address_ops sbp2_ops = { | |
249 | .write = sbp2_handle_status_write | |
250 | }; | |
251 | ||
252 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA | |
253 | static struct hpsb_address_ops sbp2_physdma_ops = { | |
254 | .read = sbp2_handle_physdma_read, | |
255 | .write = sbp2_handle_physdma_write, | |
256 | }; | |
257 | #endif | |
258 | ||
259 | static struct hpsb_protocol_driver sbp2_driver = { | |
260 | .name = "SBP2 Driver", | |
261 | .id_table = sbp2_id_table, | |
262 | .update = sbp2_update, | |
263 | .driver = { | |
264 | .name = SBP2_DEVICE_NAME, | |
265 | .bus = &ieee1394_bus_type, | |
266 | .probe = sbp2_probe, | |
267 | .remove = sbp2_remove, | |
268 | }, | |
269 | }; | |
270 | ||
271 | ||
272 | /* List of device firmware's that require a forced 36 byte inquiry. */ | |
273 | static u32 sbp2_broken_inquiry_list[] = { | |
274 | 0x00002800, /* Stefan Richter <richtest@bauwesen.tu-cottbus.de> */ | |
275 | /* DViCO Momobay CX-1 */ | |
276 | 0x00000200 /* Andreas Plesch <plesch@fas.harvard.edu> */ | |
277 | /* QPS Fire DVDBurner */ | |
278 | }; | |
279 | ||
280 | #define NUM_BROKEN_INQUIRY_DEVS \ | |
281 | (sizeof(sbp2_broken_inquiry_list)/sizeof(*sbp2_broken_inquiry_list)) | |
282 | ||
283 | /************************************** | |
284 | * General utility functions | |
285 | **************************************/ | |
286 | ||
287 | ||
288 | #ifndef __BIG_ENDIAN | |
289 | /* | |
290 | * Converts a buffer from be32 to cpu byte ordering. Length is in bytes. | |
291 | */ | |
292 | static __inline__ void sbp2util_be32_to_cpu_buffer(void *buffer, int length) | |
293 | { | |
294 | u32 *temp = buffer; | |
295 | ||
296 | for (length = (length >> 2); length--; ) | |
297 | temp[length] = be32_to_cpu(temp[length]); | |
298 | ||
299 | return; | |
300 | } | |
301 | ||
302 | /* | |
303 | * Converts a buffer from cpu to be32 byte ordering. Length is in bytes. | |
304 | */ | |
305 | static __inline__ void sbp2util_cpu_to_be32_buffer(void *buffer, int length) | |
306 | { | |
307 | u32 *temp = buffer; | |
308 | ||
309 | for (length = (length >> 2); length--; ) | |
310 | temp[length] = cpu_to_be32(temp[length]); | |
311 | ||
312 | return; | |
313 | } | |
314 | #else /* BIG_ENDIAN */ | |
315 | /* Why waste the cpu cycles? */ | |
316 | #define sbp2util_be32_to_cpu_buffer(x,y) | |
317 | #define sbp2util_cpu_to_be32_buffer(x,y) | |
318 | #endif | |
319 | ||
320 | #ifdef CONFIG_IEEE1394_SBP2_PACKET_DUMP | |
321 | /* | |
322 | * Debug packet dump routine. Length is in bytes. | |
323 | */ | |
324 | static void sbp2util_packet_dump(void *buffer, int length, char *dump_name, u32 dump_phys_addr) | |
325 | { | |
326 | int i; | |
327 | unsigned char *dump = buffer; | |
328 | ||
329 | if (!dump || !length || !dump_name) | |
330 | return; | |
331 | ||
332 | if (dump_phys_addr) | |
333 | printk("[%s, 0x%x]", dump_name, dump_phys_addr); | |
334 | else | |
335 | printk("[%s]", dump_name); | |
336 | for (i = 0; i < length; i++) { | |
337 | if (i > 0x3f) { | |
338 | printk("\n ..."); | |
339 | break; | |
340 | } | |
341 | if ((i & 0x3) == 0) | |
342 | printk(" "); | |
343 | if ((i & 0xf) == 0) | |
344 | printk("\n "); | |
345 | printk("%02x ", (int) dump[i]); | |
346 | } | |
347 | printk("\n"); | |
348 | ||
349 | return; | |
350 | } | |
351 | #else | |
352 | #define sbp2util_packet_dump(w,x,y,z) | |
353 | #endif | |
354 | ||
355 | /* | |
356 | * Goofy routine that basically does a down_timeout function. | |
357 | */ | |
358 | static int sbp2util_down_timeout(atomic_t *done, int timeout) | |
359 | { | |
360 | int i; | |
361 | ||
362 | for (i = timeout; (i > 0 && atomic_read(done) == 0); i-= HZ/10) { | |
363 | if (msleep_interruptible(100)) /* 100ms */ | |
364 | return(1); | |
365 | } | |
366 | return ((i > 0) ? 0:1); | |
367 | } | |
368 | ||
369 | /* Free's an allocated packet */ | |
370 | static void sbp2_free_packet(struct hpsb_packet *packet) | |
371 | { | |
372 | hpsb_free_tlabel(packet); | |
373 | hpsb_free_packet(packet); | |
374 | } | |
375 | ||
376 | /* This is much like hpsb_node_write(), except it ignores the response | |
377 | * subaction and returns immediately. Can be used from interrupts. | |
378 | */ | |
379 | static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr, | |
380 | quadlet_t *buffer, size_t length) | |
381 | { | |
382 | struct hpsb_packet *packet; | |
383 | ||
384 | packet = hpsb_make_writepacket(ne->host, ne->nodeid, | |
385 | addr, buffer, length); | |
386 | if (!packet) | |
387 | return -ENOMEM; | |
388 | ||
389 | hpsb_set_packet_complete_task(packet, (void (*)(void*))sbp2_free_packet, | |
390 | packet); | |
391 | ||
392 | hpsb_node_fill_packet(ne, packet); | |
393 | ||
394 | if (hpsb_send_packet(packet) < 0) { | |
395 | sbp2_free_packet(packet); | |
396 | return -EIO; | |
397 | } | |
398 | ||
399 | return 0; | |
400 | } | |
401 | ||
402 | /* | |
403 | * This function is called to create a pool of command orbs used for | |
404 | * command processing. It is called when a new sbp2 device is detected. | |
405 | */ | |
406 | static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data *scsi_id) | |
407 | { | |
408 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
409 | int i; | |
410 | unsigned long flags, orbs; | |
411 | struct sbp2_command_info *command; | |
412 | ||
413 | orbs = serialize_io ? 2 : SBP2_MAX_CMDS; | |
414 | ||
415 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
416 | for (i = 0; i < orbs; i++) { | |
417 | command = (struct sbp2_command_info *) | |
418 | kmalloc(sizeof(struct sbp2_command_info), GFP_ATOMIC); | |
419 | if (!command) { | |
420 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
421 | return(-ENOMEM); | |
422 | } | |
423 | memset(command, '\0', sizeof(struct sbp2_command_info)); | |
424 | command->command_orb_dma = | |
425 | pci_map_single (hi->host->pdev, &command->command_orb, | |
426 | sizeof(struct sbp2_command_orb), | |
427 | PCI_DMA_BIDIRECTIONAL); | |
428 | SBP2_DMA_ALLOC("single command orb DMA"); | |
429 | command->sge_dma = | |
430 | pci_map_single (hi->host->pdev, &command->scatter_gather_element, | |
431 | sizeof(command->scatter_gather_element), | |
432 | PCI_DMA_BIDIRECTIONAL); | |
433 | SBP2_DMA_ALLOC("scatter_gather_element"); | |
434 | INIT_LIST_HEAD(&command->list); | |
435 | list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed); | |
436 | } | |
437 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
438 | return 0; | |
439 | } | |
440 | ||
441 | /* | |
442 | * This function is called to delete a pool of command orbs. | |
443 | */ | |
444 | static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data *scsi_id) | |
445 | { | |
446 | struct hpsb_host *host = scsi_id->hi->host; | |
447 | struct list_head *lh, *next; | |
448 | struct sbp2_command_info *command; | |
449 | unsigned long flags; | |
450 | ||
451 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
452 | if (!list_empty(&scsi_id->sbp2_command_orb_completed)) { | |
453 | list_for_each_safe(lh, next, &scsi_id->sbp2_command_orb_completed) { | |
454 | command = list_entry(lh, struct sbp2_command_info, list); | |
455 | ||
456 | /* Release our generic DMA's */ | |
457 | pci_unmap_single(host->pdev, command->command_orb_dma, | |
458 | sizeof(struct sbp2_command_orb), | |
459 | PCI_DMA_BIDIRECTIONAL); | |
460 | SBP2_DMA_FREE("single command orb DMA"); | |
461 | pci_unmap_single(host->pdev, command->sge_dma, | |
462 | sizeof(command->scatter_gather_element), | |
463 | PCI_DMA_BIDIRECTIONAL); | |
464 | SBP2_DMA_FREE("scatter_gather_element"); | |
465 | ||
466 | kfree(command); | |
467 | } | |
468 | } | |
469 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
470 | return; | |
471 | } | |
472 | ||
473 | /* | |
474 | * This function finds the sbp2_command for a given outstanding command | |
475 | * orb.Only looks at the inuse list. | |
476 | */ | |
477 | static struct sbp2_command_info *sbp2util_find_command_for_orb( | |
478 | struct scsi_id_instance_data *scsi_id, dma_addr_t orb) | |
479 | { | |
480 | struct sbp2_command_info *command; | |
481 | unsigned long flags; | |
482 | ||
483 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
484 | if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) { | |
485 | list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) { | |
486 | if (command->command_orb_dma == orb) { | |
487 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
488 | return (command); | |
489 | } | |
490 | } | |
491 | } | |
492 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
493 | ||
494 | SBP2_ORB_DEBUG("could not match command orb %x", (unsigned int)orb); | |
495 | ||
496 | return(NULL); | |
497 | } | |
498 | ||
499 | /* | |
500 | * This function finds the sbp2_command for a given outstanding SCpnt. | |
501 | * Only looks at the inuse list. | |
502 | */ | |
503 | static struct sbp2_command_info *sbp2util_find_command_for_SCpnt(struct scsi_id_instance_data *scsi_id, void *SCpnt) | |
504 | { | |
505 | struct sbp2_command_info *command; | |
506 | unsigned long flags; | |
507 | ||
508 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
509 | if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) { | |
510 | list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) { | |
511 | if (command->Current_SCpnt == SCpnt) { | |
512 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
513 | return (command); | |
514 | } | |
515 | } | |
516 | } | |
517 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
518 | return(NULL); | |
519 | } | |
520 | ||
521 | /* | |
522 | * This function allocates a command orb used to send a scsi command. | |
523 | */ | |
524 | static struct sbp2_command_info *sbp2util_allocate_command_orb( | |
525 | struct scsi_id_instance_data *scsi_id, | |
526 | struct scsi_cmnd *Current_SCpnt, | |
527 | void (*Current_done)(struct scsi_cmnd *)) | |
528 | { | |
529 | struct list_head *lh; | |
530 | struct sbp2_command_info *command = NULL; | |
531 | unsigned long flags; | |
532 | ||
533 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
534 | if (!list_empty(&scsi_id->sbp2_command_orb_completed)) { | |
535 | lh = scsi_id->sbp2_command_orb_completed.next; | |
536 | list_del(lh); | |
537 | command = list_entry(lh, struct sbp2_command_info, list); | |
538 | command->Current_done = Current_done; | |
539 | command->Current_SCpnt = Current_SCpnt; | |
540 | list_add_tail(&command->list, &scsi_id->sbp2_command_orb_inuse); | |
541 | } else { | |
542 | SBP2_ERR("sbp2util_allocate_command_orb - No orbs available!"); | |
543 | } | |
544 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
545 | return (command); | |
546 | } | |
547 | ||
548 | /* Free our DMA's */ | |
549 | static void sbp2util_free_command_dma(struct sbp2_command_info *command) | |
550 | { | |
551 | struct scsi_id_instance_data *scsi_id = | |
552 | (struct scsi_id_instance_data *)command->Current_SCpnt->device->host->hostdata[0]; | |
553 | struct hpsb_host *host; | |
554 | ||
555 | if (!scsi_id) { | |
556 | printk(KERN_ERR "%s: scsi_id == NULL\n", __FUNCTION__); | |
557 | return; | |
558 | } | |
559 | ||
560 | host = scsi_id->ud->ne->host; | |
561 | ||
562 | if (command->cmd_dma) { | |
563 | if (command->dma_type == CMD_DMA_SINGLE) { | |
564 | pci_unmap_single(host->pdev, command->cmd_dma, | |
565 | command->dma_size, command->dma_dir); | |
566 | SBP2_DMA_FREE("single bulk"); | |
567 | } else if (command->dma_type == CMD_DMA_PAGE) { | |
568 | pci_unmap_page(host->pdev, command->cmd_dma, | |
569 | command->dma_size, command->dma_dir); | |
570 | SBP2_DMA_FREE("single page"); | |
571 | } /* XXX: Check for CMD_DMA_NONE bug */ | |
572 | command->dma_type = CMD_DMA_NONE; | |
573 | command->cmd_dma = 0; | |
574 | } | |
575 | ||
576 | if (command->sge_buffer) { | |
577 | pci_unmap_sg(host->pdev, command->sge_buffer, | |
578 | command->dma_size, command->dma_dir); | |
579 | SBP2_DMA_FREE("scatter list"); | |
580 | command->sge_buffer = NULL; | |
581 | } | |
582 | } | |
583 | ||
584 | /* | |
585 | * This function moves a command to the completed orb list. | |
586 | */ | |
587 | static void sbp2util_mark_command_completed(struct scsi_id_instance_data *scsi_id, struct sbp2_command_info *command) | |
588 | { | |
589 | unsigned long flags; | |
590 | ||
591 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
592 | list_del(&command->list); | |
593 | sbp2util_free_command_dma(command); | |
594 | list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed); | |
595 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
596 | } | |
597 | ||
598 | \f | |
599 | ||
600 | /********************************************* | |
601 | * IEEE-1394 core driver stack related section | |
602 | *********************************************/ | |
603 | static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud); | |
604 | ||
605 | static int sbp2_probe(struct device *dev) | |
606 | { | |
607 | struct unit_directory *ud; | |
608 | struct scsi_id_instance_data *scsi_id; | |
609 | ||
610 | SBP2_DEBUG("sbp2_probe"); | |
611 | ||
612 | ud = container_of(dev, struct unit_directory, device); | |
613 | ||
614 | /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s) | |
615 | * instead. */ | |
616 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY) | |
617 | return -ENODEV; | |
618 | ||
619 | scsi_id = sbp2_alloc_device(ud); | |
620 | ||
621 | if (!scsi_id) | |
622 | return -ENOMEM; | |
623 | ||
624 | sbp2_parse_unit_directory(scsi_id, ud); | |
625 | ||
626 | return sbp2_start_device(scsi_id); | |
627 | } | |
628 | ||
629 | static int sbp2_remove(struct device *dev) | |
630 | { | |
631 | struct unit_directory *ud; | |
632 | struct scsi_id_instance_data *scsi_id; | |
633 | ||
634 | SBP2_DEBUG("sbp2_remove"); | |
635 | ||
636 | ud = container_of(dev, struct unit_directory, device); | |
637 | scsi_id = ud->device.driver_data; | |
638 | ||
639 | sbp2_logout_device(scsi_id); | |
640 | sbp2_remove_device(scsi_id); | |
641 | ||
642 | return 0; | |
643 | } | |
644 | ||
645 | static int sbp2_update(struct unit_directory *ud) | |
646 | { | |
647 | struct scsi_id_instance_data *scsi_id = ud->device.driver_data; | |
648 | ||
649 | SBP2_DEBUG("sbp2_update"); | |
650 | ||
651 | if (sbp2_reconnect_device(scsi_id)) { | |
652 | ||
653 | /* | |
654 | * Ok, reconnect has failed. Perhaps we didn't | |
655 | * reconnect fast enough. Try doing a regular login, but | |
656 | * first do a logout just in case of any weirdness. | |
657 | */ | |
658 | sbp2_logout_device(scsi_id); | |
659 | ||
660 | if (sbp2_login_device(scsi_id)) { | |
661 | /* Login failed too, just fail, and the backend | |
662 | * will call our sbp2_remove for us */ | |
663 | SBP2_ERR("Failed to reconnect to sbp2 device!"); | |
664 | return -EBUSY; | |
665 | } | |
666 | } | |
667 | ||
668 | /* Set max retries to something large on the device. */ | |
669 | sbp2_set_busy_timeout(scsi_id); | |
670 | ||
671 | /* Do a SBP-2 fetch agent reset. */ | |
672 | sbp2_agent_reset(scsi_id, 1); | |
673 | ||
674 | /* Get the max speed and packet size that we can use. */ | |
675 | sbp2_max_speed_and_size(scsi_id); | |
676 | ||
677 | /* Complete any pending commands with busy (so they get | |
678 | * retried) and remove them from our queue | |
679 | */ | |
680 | sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY); | |
681 | ||
682 | /* Make sure we unblock requests (since this is likely after a bus | |
683 | * reset). */ | |
684 | scsi_unblock_requests(scsi_id->scsi_host); | |
685 | ||
686 | return 0; | |
687 | } | |
688 | ||
689 | /* This functions is called by the sbp2_probe, for each new device. We now | |
690 | * allocate one scsi host for each scsi_id (unit directory). */ | |
691 | static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud) | |
692 | { | |
693 | struct sbp2scsi_host_info *hi; | |
694 | struct Scsi_Host *scsi_host = NULL; | |
695 | struct scsi_id_instance_data *scsi_id = NULL; | |
696 | ||
697 | SBP2_DEBUG("sbp2_alloc_device"); | |
698 | ||
699 | scsi_id = kmalloc(sizeof(*scsi_id), GFP_KERNEL); | |
700 | if (!scsi_id) { | |
701 | SBP2_ERR("failed to create scsi_id"); | |
702 | goto failed_alloc; | |
703 | } | |
704 | memset(scsi_id, 0, sizeof(*scsi_id)); | |
705 | ||
706 | scsi_id->ne = ud->ne; | |
707 | scsi_id->ud = ud; | |
708 | scsi_id->speed_code = IEEE1394_SPEED_100; | |
709 | scsi_id->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100]; | |
710 | atomic_set(&scsi_id->sbp2_login_complete, 0); | |
711 | INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_inuse); | |
712 | INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_completed); | |
713 | INIT_LIST_HEAD(&scsi_id->scsi_list); | |
714 | spin_lock_init(&scsi_id->sbp2_command_orb_lock); | |
715 | scsi_id->sbp2_device_type_and_lun = SBP2_DEVICE_TYPE_LUN_UNINITIALIZED; | |
716 | ||
717 | ud->device.driver_data = scsi_id; | |
718 | ||
719 | hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host); | |
720 | if (!hi) { | |
721 | hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host, sizeof(*hi)); | |
722 | if (!hi) { | |
723 | SBP2_ERR("failed to allocate hostinfo"); | |
724 | goto failed_alloc; | |
725 | } | |
726 | SBP2_DEBUG("sbp2_alloc_device: allocated hostinfo"); | |
727 | hi->host = ud->ne->host; | |
728 | INIT_LIST_HEAD(&hi->scsi_ids); | |
729 | ||
730 | /* Register our sbp2 status address space... */ | |
731 | hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, &sbp2_ops, | |
732 | SBP2_STATUS_FIFO_ADDRESS, | |
733 | SBP2_STATUS_FIFO_ADDRESS + | |
734 | SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(SBP2_MAX_UDS_PER_NODE+1)); | |
735 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA | |
736 | /* Handle data movement if physical dma is not | |
737 | * enabled/supportedon host controller */ | |
738 | hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, &sbp2_physdma_ops, | |
739 | 0x0ULL, 0xfffffffcULL); | |
740 | #endif | |
741 | } | |
742 | ||
743 | scsi_id->hi = hi; | |
744 | ||
745 | list_add_tail(&scsi_id->scsi_list, &hi->scsi_ids); | |
746 | ||
747 | /* Register our host with the SCSI stack. */ | |
748 | scsi_host = scsi_host_alloc(&scsi_driver_template, 0); | |
749 | if (!scsi_host) { | |
750 | SBP2_ERR("failed to register scsi host"); | |
751 | goto failed_alloc; | |
752 | } | |
753 | ||
754 | scsi_host->hostdata[0] = (unsigned long)scsi_id; | |
755 | ||
756 | if (!scsi_add_host(scsi_host, &ud->device)) { | |
757 | scsi_id->scsi_host = scsi_host; | |
758 | return scsi_id; | |
759 | } | |
760 | ||
761 | SBP2_ERR("failed to add scsi host"); | |
762 | scsi_host_put(scsi_host); | |
763 | ||
764 | failed_alloc: | |
765 | sbp2_remove_device(scsi_id); | |
766 | return NULL; | |
767 | } | |
768 | ||
769 | ||
770 | static void sbp2_host_reset(struct hpsb_host *host) | |
771 | { | |
772 | struct sbp2scsi_host_info *hi; | |
773 | struct scsi_id_instance_data *scsi_id; | |
774 | ||
775 | hi = hpsb_get_hostinfo(&sbp2_highlevel, host); | |
776 | ||
777 | if (hi) { | |
778 | list_for_each_entry(scsi_id, &hi->scsi_ids, scsi_list) | |
779 | scsi_block_requests(scsi_id->scsi_host); | |
780 | } | |
781 | } | |
782 | ||
783 | ||
784 | /* | |
785 | * This function is where we first pull the node unique ids, and then | |
786 | * allocate memory and register a SBP-2 device. | |
787 | */ | |
788 | static int sbp2_start_device(struct scsi_id_instance_data *scsi_id) | |
789 | { | |
790 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
791 | struct scsi_device *sdev; | |
792 | ||
793 | SBP2_DEBUG("sbp2_start_device"); | |
794 | ||
795 | /* Login FIFO DMA */ | |
796 | scsi_id->login_response = | |
797 | pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_login_response), | |
798 | &scsi_id->login_response_dma); | |
799 | if (!scsi_id->login_response) | |
800 | goto alloc_fail; | |
801 | SBP2_DMA_ALLOC("consistent DMA region for login FIFO"); | |
802 | ||
803 | /* Query logins ORB DMA */ | |
804 | scsi_id->query_logins_orb = | |
805 | pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_query_logins_orb), | |
806 | &scsi_id->query_logins_orb_dma); | |
807 | if (!scsi_id->query_logins_orb) | |
808 | goto alloc_fail; | |
809 | SBP2_DMA_ALLOC("consistent DMA region for query logins ORB"); | |
810 | ||
811 | /* Query logins response DMA */ | |
812 | scsi_id->query_logins_response = | |
813 | pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_query_logins_response), | |
814 | &scsi_id->query_logins_response_dma); | |
815 | if (!scsi_id->query_logins_response) | |
816 | goto alloc_fail; | |
817 | SBP2_DMA_ALLOC("consistent DMA region for query logins response"); | |
818 | ||
819 | /* Reconnect ORB DMA */ | |
820 | scsi_id->reconnect_orb = | |
821 | pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_reconnect_orb), | |
822 | &scsi_id->reconnect_orb_dma); | |
823 | if (!scsi_id->reconnect_orb) | |
824 | goto alloc_fail; | |
825 | SBP2_DMA_ALLOC("consistent DMA region for reconnect ORB"); | |
826 | ||
827 | /* Logout ORB DMA */ | |
828 | scsi_id->logout_orb = | |
829 | pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_logout_orb), | |
830 | &scsi_id->logout_orb_dma); | |
831 | if (!scsi_id->logout_orb) | |
832 | goto alloc_fail; | |
833 | SBP2_DMA_ALLOC("consistent DMA region for logout ORB"); | |
834 | ||
835 | /* Login ORB DMA */ | |
836 | scsi_id->login_orb = | |
837 | pci_alloc_consistent(hi->host->pdev, sizeof(struct sbp2_login_orb), | |
838 | &scsi_id->login_orb_dma); | |
839 | if (!scsi_id->login_orb) { | |
840 | alloc_fail: | |
841 | if (scsi_id->query_logins_response) { | |
842 | pci_free_consistent(hi->host->pdev, | |
843 | sizeof(struct sbp2_query_logins_response), | |
844 | scsi_id->query_logins_response, | |
845 | scsi_id->query_logins_response_dma); | |
846 | SBP2_DMA_FREE("query logins response DMA"); | |
847 | } | |
848 | ||
849 | if (scsi_id->query_logins_orb) { | |
850 | pci_free_consistent(hi->host->pdev, | |
851 | sizeof(struct sbp2_query_logins_orb), | |
852 | scsi_id->query_logins_orb, | |
853 | scsi_id->query_logins_orb_dma); | |
854 | SBP2_DMA_FREE("query logins ORB DMA"); | |
855 | } | |
856 | ||
857 | if (scsi_id->logout_orb) { | |
858 | pci_free_consistent(hi->host->pdev, | |
859 | sizeof(struct sbp2_logout_orb), | |
860 | scsi_id->logout_orb, | |
861 | scsi_id->logout_orb_dma); | |
862 | SBP2_DMA_FREE("logout ORB DMA"); | |
863 | } | |
864 | ||
865 | if (scsi_id->reconnect_orb) { | |
866 | pci_free_consistent(hi->host->pdev, | |
867 | sizeof(struct sbp2_reconnect_orb), | |
868 | scsi_id->reconnect_orb, | |
869 | scsi_id->reconnect_orb_dma); | |
870 | SBP2_DMA_FREE("reconnect ORB DMA"); | |
871 | } | |
872 | ||
873 | if (scsi_id->login_response) { | |
874 | pci_free_consistent(hi->host->pdev, | |
875 | sizeof(struct sbp2_login_response), | |
876 | scsi_id->login_response, | |
877 | scsi_id->login_response_dma); | |
878 | SBP2_DMA_FREE("login FIFO DMA"); | |
879 | } | |
880 | ||
881 | list_del(&scsi_id->scsi_list); | |
882 | ||
883 | kfree(scsi_id); | |
884 | ||
885 | SBP2_ERR ("Could not allocate memory for scsi_id"); | |
886 | ||
887 | return -ENOMEM; | |
888 | } | |
889 | SBP2_DMA_ALLOC("consistent DMA region for login ORB"); | |
890 | ||
891 | SBP2_DEBUG("New SBP-2 device inserted, SCSI ID = %x", scsi_id->ud->id); | |
892 | ||
893 | /* | |
894 | * Create our command orb pool | |
895 | */ | |
896 | if (sbp2util_create_command_orb_pool(scsi_id)) { | |
897 | SBP2_ERR("sbp2util_create_command_orb_pool failed!"); | |
898 | sbp2_remove_device(scsi_id); | |
899 | return -ENOMEM; | |
900 | } | |
901 | ||
902 | /* Schedule a timeout here. The reason is that we may be so close | |
903 | * to a bus reset, that the device is not available for logins. | |
904 | * This can happen when the bus reset is caused by the host | |
905 | * connected to the sbp2 device being removed. That host would | |
906 | * have a certain amount of time to relogin before the sbp2 device | |
907 | * allows someone else to login instead. One second makes sense. */ | |
908 | msleep_interruptible(1000); | |
909 | if (signal_pending(current)) { | |
910 | SBP2_WARN("aborting sbp2_start_device due to event"); | |
911 | sbp2_remove_device(scsi_id); | |
912 | return -EINTR; | |
913 | } | |
914 | ||
915 | /* | |
916 | * Login to the sbp-2 device | |
917 | */ | |
918 | if (sbp2_login_device(scsi_id)) { | |
919 | /* Login failed, just remove the device. */ | |
920 | sbp2_remove_device(scsi_id); | |
921 | return -EBUSY; | |
922 | } | |
923 | ||
924 | /* | |
925 | * Set max retries to something large on the device | |
926 | */ | |
927 | sbp2_set_busy_timeout(scsi_id); | |
928 | ||
929 | /* | |
930 | * Do a SBP-2 fetch agent reset | |
931 | */ | |
932 | sbp2_agent_reset(scsi_id, 1); | |
933 | ||
934 | /* | |
935 | * Get the max speed and packet size that we can use | |
936 | */ | |
937 | sbp2_max_speed_and_size(scsi_id); | |
938 | ||
939 | /* Add this device to the scsi layer now */ | |
940 | sdev = scsi_add_device(scsi_id->scsi_host, 0, scsi_id->ud->id, 0); | |
941 | if (IS_ERR(sdev)) { | |
942 | SBP2_ERR("scsi_add_device failed"); | |
943 | return PTR_ERR(sdev); | |
944 | } | |
945 | ||
946 | return 0; | |
947 | } | |
948 | ||
949 | /* | |
950 | * This function removes an sbp2 device from the sbp2scsi_host_info struct. | |
951 | */ | |
952 | static void sbp2_remove_device(struct scsi_id_instance_data *scsi_id) | |
953 | { | |
954 | struct sbp2scsi_host_info *hi; | |
955 | ||
956 | SBP2_DEBUG("sbp2_remove_device"); | |
957 | ||
958 | if (!scsi_id) | |
959 | return; | |
960 | ||
961 | hi = scsi_id->hi; | |
962 | ||
963 | /* This will remove our scsi device aswell */ | |
964 | if (scsi_id->scsi_host) { | |
965 | scsi_remove_host(scsi_id->scsi_host); | |
966 | scsi_host_put(scsi_id->scsi_host); | |
967 | } | |
968 | ||
969 | sbp2util_remove_command_orb_pool(scsi_id); | |
970 | ||
971 | list_del(&scsi_id->scsi_list); | |
972 | ||
973 | if (scsi_id->login_response) { | |
974 | pci_free_consistent(hi->host->pdev, | |
975 | sizeof(struct sbp2_login_response), | |
976 | scsi_id->login_response, | |
977 | scsi_id->login_response_dma); | |
978 | SBP2_DMA_FREE("single login FIFO"); | |
979 | } | |
980 | ||
981 | if (scsi_id->login_orb) { | |
982 | pci_free_consistent(hi->host->pdev, | |
983 | sizeof(struct sbp2_login_orb), | |
984 | scsi_id->login_orb, | |
985 | scsi_id->login_orb_dma); | |
986 | SBP2_DMA_FREE("single login ORB"); | |
987 | } | |
988 | ||
989 | if (scsi_id->reconnect_orb) { | |
990 | pci_free_consistent(hi->host->pdev, | |
991 | sizeof(struct sbp2_reconnect_orb), | |
992 | scsi_id->reconnect_orb, | |
993 | scsi_id->reconnect_orb_dma); | |
994 | SBP2_DMA_FREE("single reconnect orb"); | |
995 | } | |
996 | ||
997 | if (scsi_id->logout_orb) { | |
998 | pci_free_consistent(hi->host->pdev, | |
999 | sizeof(struct sbp2_logout_orb), | |
1000 | scsi_id->logout_orb, | |
1001 | scsi_id->logout_orb_dma); | |
1002 | SBP2_DMA_FREE("single logout orb"); | |
1003 | } | |
1004 | ||
1005 | if (scsi_id->query_logins_orb) { | |
1006 | pci_free_consistent(hi->host->pdev, | |
1007 | sizeof(struct sbp2_query_logins_orb), | |
1008 | scsi_id->query_logins_orb, | |
1009 | scsi_id->query_logins_orb_dma); | |
1010 | SBP2_DMA_FREE("single query logins orb"); | |
1011 | } | |
1012 | ||
1013 | if (scsi_id->query_logins_response) { | |
1014 | pci_free_consistent(hi->host->pdev, | |
1015 | sizeof(struct sbp2_query_logins_response), | |
1016 | scsi_id->query_logins_response, | |
1017 | scsi_id->query_logins_response_dma); | |
1018 | SBP2_DMA_FREE("single query logins data"); | |
1019 | } | |
1020 | ||
1021 | scsi_id->ud->device.driver_data = NULL; | |
1022 | ||
1023 | SBP2_DEBUG("SBP-2 device removed, SCSI ID = %d", scsi_id->ud->id); | |
1024 | ||
1025 | kfree(scsi_id); | |
1026 | } | |
1027 | ||
1028 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA | |
1029 | /* | |
1030 | * This function deals with physical dma write requests (for adapters that do not support | |
1031 | * physical dma in hardware). Mostly just here for debugging... | |
1032 | */ | |
1033 | static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid, int destid, quadlet_t *data, | |
1034 | u64 addr, size_t length, u16 flags) | |
1035 | { | |
1036 | ||
1037 | /* | |
1038 | * Manually put the data in the right place. | |
1039 | */ | |
1040 | memcpy(bus_to_virt((u32)addr), data, length); | |
1041 | sbp2util_packet_dump(data, length, "sbp2 phys dma write by device", (u32)addr); | |
1042 | return(RCODE_COMPLETE); | |
1043 | } | |
1044 | ||
1045 | /* | |
1046 | * This function deals with physical dma read requests (for adapters that do not support | |
1047 | * physical dma in hardware). Mostly just here for debugging... | |
1048 | */ | |
1049 | static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid, quadlet_t *data, | |
1050 | u64 addr, size_t length, u16 flags) | |
1051 | { | |
1052 | ||
1053 | /* | |
1054 | * Grab data from memory and send a read response. | |
1055 | */ | |
1056 | memcpy(data, bus_to_virt((u32)addr), length); | |
1057 | sbp2util_packet_dump(data, length, "sbp2 phys dma read by device", (u32)addr); | |
1058 | return(RCODE_COMPLETE); | |
1059 | } | |
1060 | #endif | |
1061 | ||
1062 | ||
1063 | /************************************** | |
1064 | * SBP-2 protocol related section | |
1065 | **************************************/ | |
1066 | ||
1067 | /* | |
1068 | * This function determines if we should convert scsi commands for a particular sbp2 device type | |
1069 | */ | |
1070 | static __inline__ int sbp2_command_conversion_device_type(u8 device_type) | |
1071 | { | |
1072 | return (((device_type == TYPE_DISK) || | |
1073 | (device_type == TYPE_SDAD) || | |
1074 | (device_type == TYPE_ROM)) ? 1:0); | |
1075 | } | |
1076 | ||
1077 | /* | |
1078 | * This function queries the device for the maximum concurrent logins it | |
1079 | * supports. | |
1080 | */ | |
1081 | static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id) | |
1082 | { | |
1083 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1084 | quadlet_t data[2]; | |
1085 | int max_logins; | |
1086 | int active_logins; | |
1087 | ||
1088 | SBP2_DEBUG("sbp2_query_logins"); | |
1089 | ||
1090 | scsi_id->query_logins_orb->reserved1 = 0x0; | |
1091 | scsi_id->query_logins_orb->reserved2 = 0x0; | |
1092 | ||
1093 | scsi_id->query_logins_orb->query_response_lo = scsi_id->query_logins_response_dma; | |
1094 | scsi_id->query_logins_orb->query_response_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1095 | SBP2_DEBUG("sbp2_query_logins: query_response_hi/lo initialized"); | |
1096 | ||
1097 | scsi_id->query_logins_orb->lun_misc = ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST); | |
1098 | scsi_id->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1); | |
1099 | if (scsi_id->sbp2_device_type_and_lun != SBP2_DEVICE_TYPE_LUN_UNINITIALIZED) { | |
1100 | scsi_id->query_logins_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun); | |
1101 | SBP2_DEBUG("sbp2_query_logins: set lun to %d", | |
1102 | ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun)); | |
1103 | } | |
1104 | SBP2_DEBUG("sbp2_query_logins: lun_misc initialized"); | |
1105 | ||
1106 | scsi_id->query_logins_orb->reserved_resp_length = | |
1107 | ORB_SET_QUERY_LOGINS_RESP_LENGTH(sizeof(struct sbp2_query_logins_response)); | |
1108 | SBP2_DEBUG("sbp2_query_logins: reserved_resp_length initialized"); | |
1109 | ||
1110 | scsi_id->query_logins_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO + | |
1111 | SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id); | |
1112 | scsi_id->query_logins_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) | | |
1113 | SBP2_STATUS_FIFO_ADDRESS_HI); | |
1114 | SBP2_DEBUG("sbp2_query_logins: status FIFO initialized"); | |
1115 | ||
1116 | sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb)); | |
1117 | ||
1118 | SBP2_DEBUG("sbp2_query_logins: orb byte-swapped"); | |
1119 | ||
1120 | sbp2util_packet_dump(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb), | |
1121 | "sbp2 query logins orb", scsi_id->query_logins_orb_dma); | |
1122 | ||
1123 | memset(scsi_id->query_logins_response, 0, sizeof(struct sbp2_query_logins_response)); | |
1124 | memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); | |
1125 | ||
1126 | SBP2_DEBUG("sbp2_query_logins: query_logins_response/status FIFO memset"); | |
1127 | ||
1128 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); | |
1129 | data[1] = scsi_id->query_logins_orb_dma; | |
1130 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1131 | ||
1132 | atomic_set(&scsi_id->sbp2_login_complete, 0); | |
1133 | ||
1134 | SBP2_DEBUG("sbp2_query_logins: prepared to write"); | |
1135 | hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8); | |
1136 | SBP2_DEBUG("sbp2_query_logins: written"); | |
1137 | ||
1138 | if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 2*HZ)) { | |
1139 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); | |
1140 | return(-EIO); | |
1141 | } | |
1142 | ||
1143 | if (scsi_id->status_block.ORB_offset_lo != scsi_id->query_logins_orb_dma) { | |
1144 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); | |
1145 | return(-EIO); | |
1146 | } | |
1147 | ||
1148 | if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) || | |
1149 | STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) || | |
1150 | STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) { | |
1151 | ||
1152 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); | |
1153 | return(-EIO); | |
1154 | } | |
1155 | ||
1156 | sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_response, sizeof(struct sbp2_query_logins_response)); | |
1157 | ||
1158 | SBP2_DEBUG("length_max_logins = %x", | |
1159 | (unsigned int)scsi_id->query_logins_response->length_max_logins); | |
1160 | ||
1161 | SBP2_DEBUG("Query logins to SBP-2 device successful"); | |
1162 | ||
1163 | max_logins = RESPONSE_GET_MAX_LOGINS(scsi_id->query_logins_response->length_max_logins); | |
1164 | SBP2_DEBUG("Maximum concurrent logins supported: %d", max_logins); | |
1165 | ||
1166 | active_logins = RESPONSE_GET_ACTIVE_LOGINS(scsi_id->query_logins_response->length_max_logins); | |
1167 | SBP2_DEBUG("Number of active logins: %d", active_logins); | |
1168 | ||
1169 | if (active_logins >= max_logins) { | |
1170 | return(-EIO); | |
1171 | } | |
1172 | ||
1173 | return 0; | |
1174 | } | |
1175 | ||
1176 | /* | |
1177 | * This function is called in order to login to a particular SBP-2 device, | |
1178 | * after a bus reset. | |
1179 | */ | |
1180 | static int sbp2_login_device(struct scsi_id_instance_data *scsi_id) | |
1181 | { | |
1182 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1183 | quadlet_t data[2]; | |
1184 | ||
1185 | SBP2_DEBUG("sbp2_login_device"); | |
1186 | ||
1187 | if (!scsi_id->login_orb) { | |
1188 | SBP2_DEBUG("sbp2_login_device: login_orb not alloc'd!"); | |
1189 | return(-EIO); | |
1190 | } | |
1191 | ||
1192 | if (!exclusive_login) { | |
1193 | if (sbp2_query_logins(scsi_id)) { | |
1194 | SBP2_INFO("Device does not support any more concurrent logins"); | |
1195 | return(-EIO); | |
1196 | } | |
1197 | } | |
1198 | ||
1199 | /* Set-up login ORB, assume no password */ | |
1200 | scsi_id->login_orb->password_hi = 0; | |
1201 | scsi_id->login_orb->password_lo = 0; | |
1202 | SBP2_DEBUG("sbp2_login_device: password_hi/lo initialized"); | |
1203 | ||
1204 | scsi_id->login_orb->login_response_lo = scsi_id->login_response_dma; | |
1205 | scsi_id->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1206 | SBP2_DEBUG("sbp2_login_device: login_response_hi/lo initialized"); | |
1207 | ||
1208 | scsi_id->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST); | |
1209 | scsi_id->login_orb->lun_misc |= ORB_SET_RECONNECT(0); /* One second reconnect time */ | |
1210 | scsi_id->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(exclusive_login); /* Exclusive access to device */ | |
1211 | scsi_id->login_orb->lun_misc |= ORB_SET_NOTIFY(1); /* Notify us of login complete */ | |
1212 | /* Set the lun if we were able to pull it from the device's unit directory */ | |
1213 | if (scsi_id->sbp2_device_type_and_lun != SBP2_DEVICE_TYPE_LUN_UNINITIALIZED) { | |
1214 | scsi_id->login_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun); | |
1215 | SBP2_DEBUG("sbp2_query_logins: set lun to %d", | |
1216 | ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun)); | |
1217 | } | |
1218 | SBP2_DEBUG("sbp2_login_device: lun_misc initialized"); | |
1219 | ||
1220 | scsi_id->login_orb->passwd_resp_lengths = | |
1221 | ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response)); | |
1222 | SBP2_DEBUG("sbp2_login_device: passwd_resp_lengths initialized"); | |
1223 | ||
1224 | scsi_id->login_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO + | |
1225 | SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id); | |
1226 | scsi_id->login_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) | | |
1227 | SBP2_STATUS_FIFO_ADDRESS_HI); | |
1228 | SBP2_DEBUG("sbp2_login_device: status FIFO initialized"); | |
1229 | ||
1230 | /* | |
1231 | * Byte swap ORB if necessary | |
1232 | */ | |
1233 | sbp2util_cpu_to_be32_buffer(scsi_id->login_orb, sizeof(struct sbp2_login_orb)); | |
1234 | ||
1235 | SBP2_DEBUG("sbp2_login_device: orb byte-swapped"); | |
1236 | ||
1237 | sbp2util_packet_dump(scsi_id->login_orb, sizeof(struct sbp2_login_orb), | |
1238 | "sbp2 login orb", scsi_id->login_orb_dma); | |
1239 | ||
1240 | /* | |
1241 | * Initialize login response and status fifo | |
1242 | */ | |
1243 | memset(scsi_id->login_response, 0, sizeof(struct sbp2_login_response)); | |
1244 | memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); | |
1245 | ||
1246 | SBP2_DEBUG("sbp2_login_device: login_response/status FIFO memset"); | |
1247 | ||
1248 | /* | |
1249 | * Ok, let's write to the target's management agent register | |
1250 | */ | |
1251 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); | |
1252 | data[1] = scsi_id->login_orb_dma; | |
1253 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1254 | ||
1255 | atomic_set(&scsi_id->sbp2_login_complete, 0); | |
1256 | ||
1257 | SBP2_DEBUG("sbp2_login_device: prepared to write to %08x", | |
1258 | (unsigned int)scsi_id->sbp2_management_agent_addr); | |
1259 | hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8); | |
1260 | SBP2_DEBUG("sbp2_login_device: written"); | |
1261 | ||
1262 | /* | |
1263 | * Wait for login status (up to 20 seconds)... | |
1264 | */ | |
1265 | if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 20*HZ)) { | |
1266 | SBP2_ERR("Error logging into SBP-2 device - login timed-out"); | |
1267 | return(-EIO); | |
1268 | } | |
1269 | ||
1270 | /* | |
1271 | * Sanity. Make sure status returned matches login orb. | |
1272 | */ | |
1273 | if (scsi_id->status_block.ORB_offset_lo != scsi_id->login_orb_dma) { | |
1274 | SBP2_ERR("Error logging into SBP-2 device - login timed-out"); | |
1275 | return(-EIO); | |
1276 | } | |
1277 | ||
1278 | /* | |
1279 | * Check status | |
1280 | */ | |
1281 | if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) || | |
1282 | STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) || | |
1283 | STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) { | |
1284 | ||
1285 | SBP2_ERR("Error logging into SBP-2 device - login failed"); | |
1286 | return(-EIO); | |
1287 | } | |
1288 | ||
1289 | /* | |
1290 | * Byte swap the login response, for use when reconnecting or | |
1291 | * logging out. | |
1292 | */ | |
1293 | sbp2util_cpu_to_be32_buffer(scsi_id->login_response, sizeof(struct sbp2_login_response)); | |
1294 | ||
1295 | /* | |
1296 | * Grab our command block agent address from the login response. | |
1297 | */ | |
1298 | SBP2_DEBUG("command_block_agent_hi = %x", | |
1299 | (unsigned int)scsi_id->login_response->command_block_agent_hi); | |
1300 | SBP2_DEBUG("command_block_agent_lo = %x", | |
1301 | (unsigned int)scsi_id->login_response->command_block_agent_lo); | |
1302 | ||
1303 | scsi_id->sbp2_command_block_agent_addr = | |
1304 | ((u64)scsi_id->login_response->command_block_agent_hi) << 32; | |
1305 | scsi_id->sbp2_command_block_agent_addr |= ((u64)scsi_id->login_response->command_block_agent_lo); | |
1306 | scsi_id->sbp2_command_block_agent_addr &= 0x0000ffffffffffffULL; | |
1307 | ||
1308 | SBP2_INFO("Logged into SBP-2 device"); | |
1309 | ||
1310 | return(0); | |
1311 | ||
1312 | } | |
1313 | ||
1314 | /* | |
1315 | * This function is called in order to logout from a particular SBP-2 | |
1316 | * device, usually called during driver unload. | |
1317 | */ | |
1318 | static int sbp2_logout_device(struct scsi_id_instance_data *scsi_id) | |
1319 | { | |
1320 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1321 | quadlet_t data[2]; | |
1322 | int error; | |
1323 | ||
1324 | SBP2_DEBUG("sbp2_logout_device"); | |
1325 | ||
1326 | /* | |
1327 | * Set-up logout ORB | |
1328 | */ | |
1329 | scsi_id->logout_orb->reserved1 = 0x0; | |
1330 | scsi_id->logout_orb->reserved2 = 0x0; | |
1331 | scsi_id->logout_orb->reserved3 = 0x0; | |
1332 | scsi_id->logout_orb->reserved4 = 0x0; | |
1333 | ||
1334 | scsi_id->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST); | |
1335 | scsi_id->logout_orb->login_ID_misc |= ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID); | |
1336 | ||
1337 | /* Notify us when complete */ | |
1338 | scsi_id->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1); | |
1339 | ||
1340 | scsi_id->logout_orb->reserved5 = 0x0; | |
1341 | scsi_id->logout_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO + | |
1342 | SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id); | |
1343 | scsi_id->logout_orb->status_FIFO_hi = (ORB_SET_NODE_ID(hi->host->node_id) | | |
1344 | SBP2_STATUS_FIFO_ADDRESS_HI); | |
1345 | ||
1346 | /* | |
1347 | * Byte swap ORB if necessary | |
1348 | */ | |
1349 | sbp2util_cpu_to_be32_buffer(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb)); | |
1350 | ||
1351 | sbp2util_packet_dump(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb), | |
1352 | "sbp2 logout orb", scsi_id->logout_orb_dma); | |
1353 | ||
1354 | /* | |
1355 | * Ok, let's write to the target's management agent register | |
1356 | */ | |
1357 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); | |
1358 | data[1] = scsi_id->logout_orb_dma; | |
1359 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1360 | ||
1361 | atomic_set(&scsi_id->sbp2_login_complete, 0); | |
1362 | ||
1363 | error = hpsb_node_write(scsi_id->ne, | |
1364 | scsi_id->sbp2_management_agent_addr, | |
1365 | data, 8); | |
1366 | if (error) | |
1367 | return error; | |
1368 | ||
1369 | /* Wait for device to logout...1 second. */ | |
1370 | if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ)) | |
1371 | return -EIO; | |
1372 | ||
1373 | SBP2_INFO("Logged out of SBP-2 device"); | |
1374 | ||
1375 | return(0); | |
1376 | ||
1377 | } | |
1378 | ||
1379 | /* | |
1380 | * This function is called in order to reconnect to a particular SBP-2 | |
1381 | * device, after a bus reset. | |
1382 | */ | |
1383 | static int sbp2_reconnect_device(struct scsi_id_instance_data *scsi_id) | |
1384 | { | |
1385 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1386 | quadlet_t data[2]; | |
1387 | int error; | |
1388 | ||
1389 | SBP2_DEBUG("sbp2_reconnect_device"); | |
1390 | ||
1391 | /* | |
1392 | * Set-up reconnect ORB | |
1393 | */ | |
1394 | scsi_id->reconnect_orb->reserved1 = 0x0; | |
1395 | scsi_id->reconnect_orb->reserved2 = 0x0; | |
1396 | scsi_id->reconnect_orb->reserved3 = 0x0; | |
1397 | scsi_id->reconnect_orb->reserved4 = 0x0; | |
1398 | ||
1399 | scsi_id->reconnect_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST); | |
1400 | scsi_id->reconnect_orb->login_ID_misc |= | |
1401 | ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID); | |
1402 | ||
1403 | /* Notify us when complete */ | |
1404 | scsi_id->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1); | |
1405 | ||
1406 | scsi_id->reconnect_orb->reserved5 = 0x0; | |
1407 | scsi_id->reconnect_orb->status_FIFO_lo = SBP2_STATUS_FIFO_ADDRESS_LO + | |
1408 | SBP2_STATUS_FIFO_ENTRY_TO_OFFSET(scsi_id->ud->id); | |
1409 | scsi_id->reconnect_orb->status_FIFO_hi = | |
1410 | (ORB_SET_NODE_ID(hi->host->node_id) | SBP2_STATUS_FIFO_ADDRESS_HI); | |
1411 | ||
1412 | /* | |
1413 | * Byte swap ORB if necessary | |
1414 | */ | |
1415 | sbp2util_cpu_to_be32_buffer(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb)); | |
1416 | ||
1417 | sbp2util_packet_dump(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb), | |
1418 | "sbp2 reconnect orb", scsi_id->reconnect_orb_dma); | |
1419 | ||
1420 | /* | |
1421 | * Initialize status fifo | |
1422 | */ | |
1423 | memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); | |
1424 | ||
1425 | /* | |
1426 | * Ok, let's write to the target's management agent register | |
1427 | */ | |
1428 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); | |
1429 | data[1] = scsi_id->reconnect_orb_dma; | |
1430 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1431 | ||
1432 | atomic_set(&scsi_id->sbp2_login_complete, 0); | |
1433 | ||
1434 | error = hpsb_node_write(scsi_id->ne, | |
1435 | scsi_id->sbp2_management_agent_addr, | |
1436 | data, 8); | |
1437 | if (error) | |
1438 | return error; | |
1439 | ||
1440 | /* | |
1441 | * Wait for reconnect status (up to 1 second)... | |
1442 | */ | |
1443 | if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, HZ)) { | |
1444 | SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out"); | |
1445 | return(-EIO); | |
1446 | } | |
1447 | ||
1448 | /* | |
1449 | * Sanity. Make sure status returned matches reconnect orb. | |
1450 | */ | |
1451 | if (scsi_id->status_block.ORB_offset_lo != scsi_id->reconnect_orb_dma) { | |
1452 | SBP2_ERR("Error reconnecting to SBP-2 device - reconnect timed-out"); | |
1453 | return(-EIO); | |
1454 | } | |
1455 | ||
1456 | /* | |
1457 | * Check status | |
1458 | */ | |
1459 | if (STATUS_GET_RESP(scsi_id->status_block.ORB_offset_hi_misc) || | |
1460 | STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc) || | |
1461 | STATUS_GET_SBP_STATUS(scsi_id->status_block.ORB_offset_hi_misc)) { | |
1462 | ||
1463 | SBP2_ERR("Error reconnecting to SBP-2 device - reconnect failed"); | |
1464 | return(-EIO); | |
1465 | } | |
1466 | ||
1467 | HPSB_DEBUG("Reconnected to SBP-2 device"); | |
1468 | ||
1469 | return(0); | |
1470 | ||
1471 | } | |
1472 | ||
1473 | /* | |
1474 | * This function is called in order to set the busy timeout (number of | |
1475 | * retries to attempt) on the sbp2 device. | |
1476 | */ | |
1477 | static int sbp2_set_busy_timeout(struct scsi_id_instance_data *scsi_id) | |
1478 | { | |
1479 | quadlet_t data; | |
1480 | ||
1481 | SBP2_DEBUG("sbp2_set_busy_timeout"); | |
1482 | ||
1483 | /* | |
1484 | * Ok, let's write to the target's busy timeout register | |
1485 | */ | |
1486 | data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE); | |
1487 | ||
1488 | if (hpsb_node_write(scsi_id->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4)) { | |
1489 | SBP2_ERR("sbp2_set_busy_timeout error"); | |
1490 | } | |
1491 | ||
1492 | return(0); | |
1493 | } | |
1494 | ||
1495 | ||
1496 | /* | |
1497 | * This function is called to parse sbp2 device's config rom unit | |
1498 | * directory. Used to determine things like sbp2 management agent offset, | |
1499 | * and command set used (SCSI or RBC). | |
1500 | */ | |
1501 | static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id, | |
1502 | struct unit_directory *ud) | |
1503 | { | |
1504 | struct csr1212_keyval *kv; | |
1505 | struct csr1212_dentry *dentry; | |
1506 | u64 management_agent_addr; | |
1507 | u32 command_set_spec_id, command_set, unit_characteristics, | |
1508 | firmware_revision, workarounds; | |
1509 | int i; | |
1510 | ||
1511 | SBP2_DEBUG("sbp2_parse_unit_directory"); | |
1512 | ||
1513 | management_agent_addr = 0x0; | |
1514 | command_set_spec_id = 0x0; | |
1515 | command_set = 0x0; | |
1516 | unit_characteristics = 0x0; | |
1517 | firmware_revision = 0x0; | |
1518 | ||
1519 | /* Handle different fields in the unit directory, based on keys */ | |
1520 | csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) { | |
1521 | switch (kv->key.id) { | |
1522 | case CSR1212_KV_ID_DEPENDENT_INFO: | |
1523 | if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET) { | |
1524 | /* Save off the management agent address */ | |
1525 | management_agent_addr = | |
1526 | CSR1212_REGISTER_SPACE_BASE + | |
1527 | (kv->value.csr_offset << 2); | |
1528 | ||
1529 | SBP2_DEBUG("sbp2_management_agent_addr = %x", | |
1530 | (unsigned int) management_agent_addr); | |
1531 | } else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { | |
1532 | scsi_id->sbp2_device_type_and_lun = kv->value.immediate; | |
1533 | } | |
1534 | break; | |
1535 | ||
1536 | case SBP2_COMMAND_SET_SPEC_ID_KEY: | |
1537 | /* Command spec organization */ | |
1538 | command_set_spec_id = kv->value.immediate; | |
1539 | SBP2_DEBUG("sbp2_command_set_spec_id = %x", | |
1540 | (unsigned int) command_set_spec_id); | |
1541 | break; | |
1542 | ||
1543 | case SBP2_COMMAND_SET_KEY: | |
1544 | /* Command set used by sbp2 device */ | |
1545 | command_set = kv->value.immediate; | |
1546 | SBP2_DEBUG("sbp2_command_set = %x", | |
1547 | (unsigned int) command_set); | |
1548 | break; | |
1549 | ||
1550 | case SBP2_UNIT_CHARACTERISTICS_KEY: | |
1551 | /* | |
1552 | * Unit characterisitcs (orb related stuff | |
1553 | * that I'm not yet paying attention to) | |
1554 | */ | |
1555 | unit_characteristics = kv->value.immediate; | |
1556 | SBP2_DEBUG("sbp2_unit_characteristics = %x", | |
1557 | (unsigned int) unit_characteristics); | |
1558 | break; | |
1559 | ||
1560 | case SBP2_FIRMWARE_REVISION_KEY: | |
1561 | /* Firmware revision */ | |
1562 | firmware_revision = kv->value.immediate; | |
1563 | if (force_inquiry_hack) | |
1564 | SBP2_INFO("sbp2_firmware_revision = %x", | |
1565 | (unsigned int) firmware_revision); | |
1566 | else SBP2_DEBUG("sbp2_firmware_revision = %x", | |
1567 | (unsigned int) firmware_revision); | |
1568 | break; | |
1569 | ||
1570 | default: | |
1571 | break; | |
1572 | } | |
1573 | } | |
1574 | ||
1575 | /* This is the start of our broken device checking. We try to hack | |
1576 | * around oddities and known defects. */ | |
1577 | workarounds = 0x0; | |
1578 | ||
1579 | /* If the vendor id is 0xa0b8 (Symbios vendor id), then we have a | |
1580 | * bridge with 128KB max transfer size limitation. For sanity, we | |
1581 | * only voice this when the current max_sectors setting | |
1582 | * exceeds the 128k limit. By default, that is not the case. | |
1583 | * | |
1584 | * It would be really nice if we could detect this before the scsi | |
1585 | * host gets initialized. That way we can down-force the | |
1586 | * max_sectors to account for it. That is not currently | |
1587 | * possible. */ | |
1588 | if ((firmware_revision & 0xffff00) == | |
1589 | SBP2_128KB_BROKEN_FIRMWARE && | |
1590 | (max_sectors * 512) > (128*1024)) { | |
1591 | SBP2_WARN("Node " NODE_BUS_FMT ": Bridge only supports 128KB max transfer size.", | |
1592 | NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid)); | |
1593 | SBP2_WARN("WARNING: Current max_sectors setting is larger than 128KB (%d sectors)!", | |
1594 | max_sectors); | |
1595 | workarounds |= SBP2_BREAKAGE_128K_MAX_TRANSFER; | |
1596 | } | |
1597 | ||
1598 | /* Check for a blacklisted set of devices that require us to force | |
1599 | * a 36 byte host inquiry. This can be overriden as a module param | |
1600 | * (to force all hosts). */ | |
1601 | for (i = 0; i < NUM_BROKEN_INQUIRY_DEVS; i++) { | |
1602 | if ((firmware_revision & 0xffff00) == | |
1603 | sbp2_broken_inquiry_list[i]) { | |
1604 | SBP2_WARN("Node " NODE_BUS_FMT ": Using 36byte inquiry workaround", | |
1605 | NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid)); | |
1606 | workarounds |= SBP2_BREAKAGE_INQUIRY_HACK; | |
1607 | break; /* No need to continue. */ | |
1608 | } | |
1609 | } | |
1610 | ||
1611 | /* If this is a logical unit directory entry, process the parent | |
1612 | * to get the values. */ | |
1613 | if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) { | |
1614 | struct unit_directory *parent_ud = | |
1615 | container_of(ud->device.parent, struct unit_directory, device); | |
1616 | sbp2_parse_unit_directory(scsi_id, parent_ud); | |
1617 | } else { | |
1618 | scsi_id->sbp2_management_agent_addr = management_agent_addr; | |
1619 | scsi_id->sbp2_command_set_spec_id = command_set_spec_id; | |
1620 | scsi_id->sbp2_command_set = command_set; | |
1621 | scsi_id->sbp2_unit_characteristics = unit_characteristics; | |
1622 | scsi_id->sbp2_firmware_revision = firmware_revision; | |
1623 | scsi_id->workarounds = workarounds; | |
1624 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN) | |
1625 | scsi_id->sbp2_device_type_and_lun = ud->lun; | |
1626 | } | |
1627 | } | |
1628 | ||
1629 | /* | |
1630 | * This function is called in order to determine the max speed and packet | |
1631 | * size we can use in our ORBs. Note, that we (the driver and host) only | |
1632 | * initiate the transaction. The SBP-2 device actually transfers the data | |
1633 | * (by reading from the DMA area we tell it). This means that the SBP-2 | |
1634 | * device decides the actual maximum data it can transfer. We just tell it | |
1635 | * the speed that it needs to use, and the max_rec the host supports, and | |
1636 | * it takes care of the rest. | |
1637 | */ | |
1638 | static int sbp2_max_speed_and_size(struct scsi_id_instance_data *scsi_id) | |
1639 | { | |
1640 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1641 | ||
1642 | SBP2_DEBUG("sbp2_max_speed_and_size"); | |
1643 | ||
1644 | /* Initial setting comes from the hosts speed map */ | |
1645 | scsi_id->speed_code = hi->host->speed_map[NODEID_TO_NODE(hi->host->node_id) * 64 | |
1646 | + NODEID_TO_NODE(scsi_id->ne->nodeid)]; | |
1647 | ||
1648 | /* Bump down our speed if the user requested it */ | |
1649 | if (scsi_id->speed_code > max_speed) { | |
1650 | scsi_id->speed_code = max_speed; | |
1651 | SBP2_ERR("Forcing SBP-2 max speed down to %s", | |
1652 | hpsb_speedto_str[scsi_id->speed_code]); | |
1653 | } | |
1654 | ||
1655 | /* Payload size is the lesser of what our speed supports and what | |
1656 | * our host supports. */ | |
1657 | scsi_id->max_payload_size = min(sbp2_speedto_max_payload[scsi_id->speed_code], | |
1658 | (u8)(hi->host->csr.max_rec - 1)); | |
1659 | ||
1660 | HPSB_DEBUG("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]", | |
1661 | NODE_BUS_ARGS(hi->host, scsi_id->ne->nodeid), | |
1662 | hpsb_speedto_str[scsi_id->speed_code], | |
1663 | 1 << ((u32)scsi_id->max_payload_size + 2)); | |
1664 | ||
1665 | return(0); | |
1666 | } | |
1667 | ||
1668 | /* | |
1669 | * This function is called in order to perform a SBP-2 agent reset. | |
1670 | */ | |
1671 | static int sbp2_agent_reset(struct scsi_id_instance_data *scsi_id, int wait) | |
1672 | { | |
1673 | quadlet_t data; | |
1674 | u64 addr; | |
1675 | int retval; | |
1676 | ||
1677 | SBP2_DEBUG("sbp2_agent_reset"); | |
1678 | ||
1679 | /* | |
1680 | * Ok, let's write to the target's management agent register | |
1681 | */ | |
1682 | data = ntohl(SBP2_AGENT_RESET_DATA); | |
1683 | addr = scsi_id->sbp2_command_block_agent_addr + SBP2_AGENT_RESET_OFFSET; | |
1684 | ||
1685 | if (wait) | |
1686 | retval = hpsb_node_write(scsi_id->ne, addr, &data, 4); | |
1687 | else | |
1688 | retval = sbp2util_node_write_no_wait(scsi_id->ne, addr, &data, 4); | |
1689 | ||
1690 | if (retval < 0) { | |
1691 | SBP2_ERR("hpsb_node_write failed.\n"); | |
1692 | return -EIO; | |
1693 | } | |
1694 | ||
1695 | /* | |
1696 | * Need to make sure orb pointer is written on next command | |
1697 | */ | |
1698 | scsi_id->last_orb = NULL; | |
1699 | ||
1700 | return(0); | |
1701 | } | |
1702 | ||
1703 | /* | |
1704 | * This function is called to create the actual command orb and s/g list | |
1705 | * out of the scsi command itself. | |
1706 | */ | |
1707 | static int sbp2_create_command_orb(struct scsi_id_instance_data *scsi_id, | |
1708 | struct sbp2_command_info *command, | |
1709 | unchar *scsi_cmd, | |
1710 | unsigned int scsi_use_sg, | |
1711 | unsigned int scsi_request_bufflen, | |
1712 | void *scsi_request_buffer, | |
1713 | enum dma_data_direction dma_dir) | |
1714 | ||
1715 | { | |
1716 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1717 | struct scatterlist *sgpnt = (struct scatterlist *) scsi_request_buffer; | |
1718 | struct sbp2_command_orb *command_orb = &command->command_orb; | |
1719 | struct sbp2_unrestricted_page_table *scatter_gather_element = | |
1720 | &command->scatter_gather_element[0]; | |
1721 | u32 sg_count, sg_len, orb_direction; | |
1722 | dma_addr_t sg_addr; | |
1723 | int i; | |
1724 | ||
1725 | /* | |
1726 | * Set-up our command ORB.. | |
1727 | * | |
1728 | * NOTE: We're doing unrestricted page tables (s/g), as this is | |
1729 | * best performance (at least with the devices I have). This means | |
1730 | * that data_size becomes the number of s/g elements, and | |
1731 | * page_size should be zero (for unrestricted). | |
1732 | */ | |
1733 | command_orb->next_ORB_hi = ORB_SET_NULL_PTR(1); | |
1734 | command_orb->next_ORB_lo = 0x0; | |
1735 | command_orb->misc = ORB_SET_MAX_PAYLOAD(scsi_id->max_payload_size); | |
1736 | command_orb->misc |= ORB_SET_SPEED(scsi_id->speed_code); | |
1737 | command_orb->misc |= ORB_SET_NOTIFY(1); /* Notify us when complete */ | |
1738 | ||
1739 | /* | |
1740 | * Get the direction of the transfer. If the direction is unknown, then use our | |
1741 | * goofy table as a back-up. | |
1742 | */ | |
1743 | switch (dma_dir) { | |
1744 | case DMA_NONE: | |
1745 | orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; | |
1746 | break; | |
1747 | case DMA_TO_DEVICE: | |
1748 | orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA; | |
1749 | break; | |
1750 | case DMA_FROM_DEVICE: | |
1751 | orb_direction = ORB_DIRECTION_READ_FROM_MEDIA; | |
1752 | break; | |
1753 | case DMA_BIDIRECTIONAL: | |
1754 | default: | |
1755 | SBP2_ERR("SCSI data transfer direction not specified. " | |
1756 | "Update the SBP2 direction table in sbp2.h if " | |
1757 | "necessary for your application"); | |
1758 | __scsi_print_command(scsi_cmd); | |
1759 | orb_direction = sbp2scsi_direction_table[*scsi_cmd]; | |
1760 | break; | |
1761 | } | |
1762 | ||
1763 | /* | |
1764 | * Set-up our pagetable stuff... unfortunately, this has become | |
1765 | * messier than I'd like. Need to clean this up a bit. ;-) | |
1766 | */ | |
1767 | if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) { | |
1768 | ||
1769 | SBP2_DEBUG("No data transfer"); | |
1770 | ||
1771 | /* | |
1772 | * Handle no data transfer | |
1773 | */ | |
1774 | command_orb->data_descriptor_hi = 0x0; | |
1775 | command_orb->data_descriptor_lo = 0x0; | |
1776 | command_orb->misc |= ORB_SET_DIRECTION(1); | |
1777 | ||
1778 | } else if (scsi_use_sg) { | |
1779 | ||
1780 | SBP2_DEBUG("Use scatter/gather"); | |
1781 | ||
1782 | /* | |
1783 | * Special case if only one element (and less than 64KB in size) | |
1784 | */ | |
1785 | if ((scsi_use_sg == 1) && (sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) { | |
1786 | ||
1787 | SBP2_DEBUG("Only one s/g element"); | |
1788 | command->dma_dir = dma_dir; | |
1789 | command->dma_size = sgpnt[0].length; | |
1790 | command->dma_type = CMD_DMA_PAGE; | |
1791 | command->cmd_dma = pci_map_page(hi->host->pdev, | |
1792 | sgpnt[0].page, | |
1793 | sgpnt[0].offset, | |
1794 | command->dma_size, | |
1795 | command->dma_dir); | |
1796 | SBP2_DMA_ALLOC("single page scatter element"); | |
1797 | ||
1798 | command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1799 | command_orb->data_descriptor_lo = command->cmd_dma; | |
1800 | command_orb->misc |= ORB_SET_DATA_SIZE(command->dma_size); | |
1801 | command_orb->misc |= ORB_SET_DIRECTION(orb_direction); | |
1802 | ||
1803 | } else { | |
1804 | int count = pci_map_sg(hi->host->pdev, sgpnt, scsi_use_sg, dma_dir); | |
1805 | SBP2_DMA_ALLOC("scatter list"); | |
1806 | ||
1807 | command->dma_size = scsi_use_sg; | |
1808 | command->dma_dir = dma_dir; | |
1809 | command->sge_buffer = sgpnt; | |
1810 | ||
1811 | /* use page tables (s/g) */ | |
1812 | command_orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); | |
1813 | command_orb->misc |= ORB_SET_DIRECTION(orb_direction); | |
1814 | command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1815 | command_orb->data_descriptor_lo = command->sge_dma; | |
1816 | ||
1817 | /* | |
1818 | * Loop through and fill out our sbp-2 page tables | |
1819 | * (and split up anything too large) | |
1820 | */ | |
1821 | for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) { | |
1822 | sg_len = sg_dma_len(sgpnt); | |
1823 | sg_addr = sg_dma_address(sgpnt); | |
1824 | while (sg_len) { | |
1825 | scatter_gather_element[sg_count].segment_base_lo = sg_addr; | |
1826 | if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { | |
1827 | scatter_gather_element[sg_count].length_segment_base_hi = | |
1828 | PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); | |
1829 | sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; | |
1830 | sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; | |
1831 | } else { | |
1832 | scatter_gather_element[sg_count].length_segment_base_hi = | |
1833 | PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); | |
1834 | sg_len = 0; | |
1835 | } | |
1836 | sg_count++; | |
1837 | } | |
1838 | } | |
1839 | ||
1840 | /* Number of page table (s/g) elements */ | |
1841 | command_orb->misc |= ORB_SET_DATA_SIZE(sg_count); | |
1842 | ||
1843 | sbp2util_packet_dump(scatter_gather_element, | |
1844 | (sizeof(struct sbp2_unrestricted_page_table)) * sg_count, | |
1845 | "sbp2 s/g list", command->sge_dma); | |
1846 | ||
1847 | /* | |
1848 | * Byte swap page tables if necessary | |
1849 | */ | |
1850 | sbp2util_cpu_to_be32_buffer(scatter_gather_element, | |
1851 | (sizeof(struct sbp2_unrestricted_page_table)) * | |
1852 | sg_count); | |
1853 | ||
1854 | } | |
1855 | ||
1856 | } else { | |
1857 | ||
1858 | SBP2_DEBUG("No scatter/gather"); | |
1859 | ||
1860 | command->dma_dir = dma_dir; | |
1861 | command->dma_size = scsi_request_bufflen; | |
1862 | command->dma_type = CMD_DMA_SINGLE; | |
1863 | command->cmd_dma = pci_map_single (hi->host->pdev, scsi_request_buffer, | |
1864 | command->dma_size, | |
1865 | command->dma_dir); | |
1866 | SBP2_DMA_ALLOC("single bulk"); | |
1867 | ||
1868 | /* | |
1869 | * Handle case where we get a command w/o s/g enabled (but | |
1870 | * check for transfers larger than 64K) | |
1871 | */ | |
1872 | if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) { | |
1873 | ||
1874 | command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1875 | command_orb->data_descriptor_lo = command->cmd_dma; | |
1876 | command_orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen); | |
1877 | command_orb->misc |= ORB_SET_DIRECTION(orb_direction); | |
1878 | ||
1879 | /* | |
1880 | * Sanity, in case our direction table is not | |
1881 | * up-to-date | |
1882 | */ | |
1883 | if (!scsi_request_bufflen) { | |
1884 | command_orb->data_descriptor_hi = 0x0; | |
1885 | command_orb->data_descriptor_lo = 0x0; | |
1886 | command_orb->misc |= ORB_SET_DIRECTION(1); | |
1887 | } | |
1888 | ||
1889 | } else { | |
1890 | /* | |
1891 | * Need to turn this into page tables, since the | |
1892 | * buffer is too large. | |
1893 | */ | |
1894 | command_orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1895 | command_orb->data_descriptor_lo = command->sge_dma; | |
1896 | ||
1897 | /* Use page tables (s/g) */ | |
1898 | command_orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); | |
1899 | command_orb->misc |= ORB_SET_DIRECTION(orb_direction); | |
1900 | ||
1901 | /* | |
1902 | * fill out our sbp-2 page tables (and split up | |
1903 | * the large buffer) | |
1904 | */ | |
1905 | sg_count = 0; | |
1906 | sg_len = scsi_request_bufflen; | |
1907 | sg_addr = command->cmd_dma; | |
1908 | while (sg_len) { | |
1909 | scatter_gather_element[sg_count].segment_base_lo = sg_addr; | |
1910 | if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { | |
1911 | scatter_gather_element[sg_count].length_segment_base_hi = | |
1912 | PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); | |
1913 | sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; | |
1914 | sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; | |
1915 | } else { | |
1916 | scatter_gather_element[sg_count].length_segment_base_hi = | |
1917 | PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); | |
1918 | sg_len = 0; | |
1919 | } | |
1920 | sg_count++; | |
1921 | } | |
1922 | ||
1923 | /* Number of page table (s/g) elements */ | |
1924 | command_orb->misc |= ORB_SET_DATA_SIZE(sg_count); | |
1925 | ||
1926 | sbp2util_packet_dump(scatter_gather_element, | |
1927 | (sizeof(struct sbp2_unrestricted_page_table)) * sg_count, | |
1928 | "sbp2 s/g list", command->sge_dma); | |
1929 | ||
1930 | /* | |
1931 | * Byte swap page tables if necessary | |
1932 | */ | |
1933 | sbp2util_cpu_to_be32_buffer(scatter_gather_element, | |
1934 | (sizeof(struct sbp2_unrestricted_page_table)) * | |
1935 | sg_count); | |
1936 | ||
1937 | } | |
1938 | ||
1939 | } | |
1940 | ||
1941 | /* | |
1942 | * Byte swap command ORB if necessary | |
1943 | */ | |
1944 | sbp2util_cpu_to_be32_buffer(command_orb, sizeof(struct sbp2_command_orb)); | |
1945 | ||
1946 | /* | |
1947 | * Put our scsi command in the command ORB | |
1948 | */ | |
1949 | memset(command_orb->cdb, 0, 12); | |
1950 | memcpy(command_orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd)); | |
1951 | ||
1952 | return(0); | |
1953 | } | |
1954 | ||
1955 | /* | |
1956 | * This function is called in order to begin a regular SBP-2 command. | |
1957 | */ | |
1958 | static int sbp2_link_orb_command(struct scsi_id_instance_data *scsi_id, | |
1959 | struct sbp2_command_info *command) | |
1960 | { | |
1961 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1962 | struct sbp2_command_orb *command_orb = &command->command_orb; | |
1963 | struct node_entry *ne = scsi_id->ne; | |
1964 | u64 addr; | |
1965 | ||
1966 | outstanding_orb_incr; | |
1967 | SBP2_ORB_DEBUG("sending command orb %p, total orbs = %x", | |
1968 | command_orb, global_outstanding_command_orbs); | |
1969 | ||
1970 | pci_dma_sync_single_for_device(hi->host->pdev, command->command_orb_dma, | |
1971 | sizeof(struct sbp2_command_orb), | |
1972 | PCI_DMA_BIDIRECTIONAL); | |
1973 | pci_dma_sync_single_for_device(hi->host->pdev, command->sge_dma, | |
1974 | sizeof(command->scatter_gather_element), | |
1975 | PCI_DMA_BIDIRECTIONAL); | |
1976 | /* | |
1977 | * Check to see if there are any previous orbs to use | |
1978 | */ | |
1979 | if (scsi_id->last_orb == NULL) { | |
1980 | quadlet_t data[2]; | |
1981 | ||
1982 | /* | |
1983 | * Ok, let's write to the target's management agent register | |
1984 | */ | |
1985 | addr = scsi_id->sbp2_command_block_agent_addr + SBP2_ORB_POINTER_OFFSET; | |
1986 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); | |
1987 | data[1] = command->command_orb_dma; | |
1988 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1989 | ||
1990 | SBP2_ORB_DEBUG("write command agent, command orb %p", command_orb); | |
1991 | ||
1992 | if (sbp2util_node_write_no_wait(ne, addr, data, 8) < 0) { | |
1993 | SBP2_ERR("sbp2util_node_write_no_wait failed.\n"); | |
1994 | return -EIO; | |
1995 | } | |
1996 | ||
1997 | SBP2_ORB_DEBUG("write command agent complete"); | |
1998 | ||
1999 | scsi_id->last_orb = command_orb; | |
2000 | scsi_id->last_orb_dma = command->command_orb_dma; | |
2001 | ||
2002 | } else { | |
2003 | quadlet_t data; | |
2004 | ||
2005 | /* | |
2006 | * We have an orb already sent (maybe or maybe not | |
2007 | * processed) that we can append this orb to. So do so, | |
2008 | * and ring the doorbell. Have to be very careful | |
2009 | * modifying these next orb pointers, as they are accessed | |
2010 | * both by the sbp2 device and us. | |
2011 | */ | |
2012 | scsi_id->last_orb->next_ORB_lo = | |
2013 | cpu_to_be32(command->command_orb_dma); | |
2014 | /* Tells hardware that this pointer is valid */ | |
2015 | scsi_id->last_orb->next_ORB_hi = 0x0; | |
2016 | pci_dma_sync_single_for_device(hi->host->pdev, scsi_id->last_orb_dma, | |
2017 | sizeof(struct sbp2_command_orb), | |
2018 | PCI_DMA_BIDIRECTIONAL); | |
2019 | ||
2020 | /* | |
2021 | * Ring the doorbell | |
2022 | */ | |
2023 | data = cpu_to_be32(command->command_orb_dma); | |
2024 | addr = scsi_id->sbp2_command_block_agent_addr + SBP2_DOORBELL_OFFSET; | |
2025 | ||
2026 | SBP2_ORB_DEBUG("ring doorbell, command orb %p", command_orb); | |
2027 | ||
2028 | if (sbp2util_node_write_no_wait(ne, addr, &data, 4) < 0) { | |
2029 | SBP2_ERR("sbp2util_node_write_no_wait failed"); | |
2030 | return(-EIO); | |
2031 | } | |
2032 | ||
2033 | scsi_id->last_orb = command_orb; | |
2034 | scsi_id->last_orb_dma = command->command_orb_dma; | |
2035 | ||
2036 | } | |
2037 | return(0); | |
2038 | } | |
2039 | ||
2040 | /* | |
2041 | * This function is called in order to begin a regular SBP-2 command. | |
2042 | */ | |
2043 | static int sbp2_send_command(struct scsi_id_instance_data *scsi_id, | |
2044 | struct scsi_cmnd *SCpnt, | |
2045 | void (*done)(struct scsi_cmnd *)) | |
2046 | { | |
2047 | unchar *cmd = (unchar *) SCpnt->cmnd; | |
2048 | unsigned int request_bufflen = SCpnt->request_bufflen; | |
2049 | struct sbp2_command_info *command; | |
2050 | ||
2051 | SBP2_DEBUG("sbp2_send_command"); | |
2052 | #if (CONFIG_IEEE1394_SBP2_DEBUG >= 2) || defined(CONFIG_IEEE1394_SBP2_PACKET_DUMP) | |
2053 | printk("[scsi command]\n "); | |
2054 | scsi_print_command(SCpnt); | |
2055 | #endif | |
2056 | SBP2_DEBUG("SCSI transfer size = %x", request_bufflen); | |
2057 | SBP2_DEBUG("SCSI s/g elements = %x", (unsigned int)SCpnt->use_sg); | |
2058 | ||
2059 | /* | |
2060 | * Allocate a command orb and s/g structure | |
2061 | */ | |
2062 | command = sbp2util_allocate_command_orb(scsi_id, SCpnt, done); | |
2063 | if (!command) { | |
2064 | return(-EIO); | |
2065 | } | |
2066 | ||
2067 | /* | |
2068 | * The scsi stack sends down a request_bufflen which does not match the | |
2069 | * length field in the scsi cdb. This causes some sbp2 devices to | |
2070 | * reject this inquiry command. Fix the request_bufflen. | |
2071 | */ | |
2072 | if (*cmd == INQUIRY) { | |
2073 | if (force_inquiry_hack || scsi_id->workarounds & SBP2_BREAKAGE_INQUIRY_HACK) | |
2074 | request_bufflen = cmd[4] = 0x24; | |
2075 | else | |
2076 | request_bufflen = cmd[4]; | |
2077 | } | |
2078 | ||
2079 | /* | |
2080 | * Now actually fill in the comamnd orb and sbp2 s/g list | |
2081 | */ | |
2082 | sbp2_create_command_orb(scsi_id, command, cmd, SCpnt->use_sg, | |
2083 | request_bufflen, SCpnt->request_buffer, | |
2084 | SCpnt->sc_data_direction); | |
2085 | /* | |
2086 | * Update our cdb if necessary (to handle sbp2 RBC command set | |
2087 | * differences). This is where the command set hacks go! =) | |
2088 | */ | |
2089 | sbp2_check_sbp2_command(scsi_id, command->command_orb.cdb); | |
2090 | ||
2091 | sbp2util_packet_dump(&command->command_orb, sizeof(struct sbp2_command_orb), | |
2092 | "sbp2 command orb", command->command_orb_dma); | |
2093 | ||
2094 | /* | |
2095 | * Initialize status fifo | |
2096 | */ | |
2097 | memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block)); | |
2098 | ||
2099 | /* | |
2100 | * Link up the orb, and ring the doorbell if needed | |
2101 | */ | |
2102 | sbp2_link_orb_command(scsi_id, command); | |
2103 | ||
2104 | return(0); | |
2105 | } | |
2106 | ||
2107 | ||
2108 | /* | |
2109 | * This function deals with command set differences between Linux scsi | |
2110 | * command set and sbp2 RBC command set. | |
2111 | */ | |
2112 | static void sbp2_check_sbp2_command(struct scsi_id_instance_data *scsi_id, unchar *cmd) | |
2113 | { | |
2114 | unchar new_cmd[16]; | |
2115 | u8 device_type = SBP2_DEVICE_TYPE (scsi_id->sbp2_device_type_and_lun); | |
2116 | ||
2117 | SBP2_DEBUG("sbp2_check_sbp2_command"); | |
2118 | ||
2119 | switch (*cmd) { | |
2120 | ||
2121 | case READ_6: | |
2122 | ||
2123 | if (sbp2_command_conversion_device_type(device_type)) { | |
2124 | ||
2125 | SBP2_DEBUG("Convert READ_6 to READ_10"); | |
2126 | ||
2127 | /* | |
2128 | * Need to turn read_6 into read_10 | |
2129 | */ | |
2130 | new_cmd[0] = 0x28; | |
2131 | new_cmd[1] = (cmd[1] & 0xe0); | |
2132 | new_cmd[2] = 0x0; | |
2133 | new_cmd[3] = (cmd[1] & 0x1f); | |
2134 | new_cmd[4] = cmd[2]; | |
2135 | new_cmd[5] = cmd[3]; | |
2136 | new_cmd[6] = 0x0; | |
2137 | new_cmd[7] = 0x0; | |
2138 | new_cmd[8] = cmd[4]; | |
2139 | new_cmd[9] = cmd[5]; | |
2140 | ||
2141 | memcpy(cmd, new_cmd, 10); | |
2142 | ||
2143 | } | |
2144 | ||
2145 | break; | |
2146 | ||
2147 | case WRITE_6: | |
2148 | ||
2149 | if (sbp2_command_conversion_device_type(device_type)) { | |
2150 | ||
2151 | SBP2_DEBUG("Convert WRITE_6 to WRITE_10"); | |
2152 | ||
2153 | /* | |
2154 | * Need to turn write_6 into write_10 | |
2155 | */ | |
2156 | new_cmd[0] = 0x2a; | |
2157 | new_cmd[1] = (cmd[1] & 0xe0); | |
2158 | new_cmd[2] = 0x0; | |
2159 | new_cmd[3] = (cmd[1] & 0x1f); | |
2160 | new_cmd[4] = cmd[2]; | |
2161 | new_cmd[5] = cmd[3]; | |
2162 | new_cmd[6] = 0x0; | |
2163 | new_cmd[7] = 0x0; | |
2164 | new_cmd[8] = cmd[4]; | |
2165 | new_cmd[9] = cmd[5]; | |
2166 | ||
2167 | memcpy(cmd, new_cmd, 10); | |
2168 | ||
2169 | } | |
2170 | ||
2171 | break; | |
2172 | ||
2173 | case MODE_SENSE: | |
2174 | ||
2175 | if (sbp2_command_conversion_device_type(device_type)) { | |
2176 | ||
2177 | SBP2_DEBUG("Convert MODE_SENSE_6 to MODE_SENSE_10"); | |
2178 | ||
2179 | /* | |
2180 | * Need to turn mode_sense_6 into mode_sense_10 | |
2181 | */ | |
2182 | new_cmd[0] = 0x5a; | |
2183 | new_cmd[1] = cmd[1]; | |
2184 | new_cmd[2] = cmd[2]; | |
2185 | new_cmd[3] = 0x0; | |
2186 | new_cmd[4] = 0x0; | |
2187 | new_cmd[5] = 0x0; | |
2188 | new_cmd[6] = 0x0; | |
2189 | new_cmd[7] = 0x0; | |
2190 | new_cmd[8] = cmd[4]; | |
2191 | new_cmd[9] = cmd[5]; | |
2192 | ||
2193 | memcpy(cmd, new_cmd, 10); | |
2194 | ||
2195 | } | |
2196 | ||
2197 | break; | |
2198 | ||
2199 | case MODE_SELECT: | |
2200 | ||
2201 | /* | |
2202 | * TODO. Probably need to change mode select to 10 byte version | |
2203 | */ | |
2204 | ||
2205 | default: | |
2206 | break; | |
2207 | } | |
2208 | ||
2209 | return; | |
2210 | } | |
2211 | ||
2212 | /* | |
2213 | * Translates SBP-2 status into SCSI sense data for check conditions | |
2214 | */ | |
2215 | static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, unchar *sense_data) | |
2216 | { | |
2217 | SBP2_DEBUG("sbp2_status_to_sense_data"); | |
2218 | ||
2219 | /* | |
2220 | * Ok, it's pretty ugly... ;-) | |
2221 | */ | |
2222 | sense_data[0] = 0x70; | |
2223 | sense_data[1] = 0x0; | |
2224 | sense_data[2] = sbp2_status[9]; | |
2225 | sense_data[3] = sbp2_status[12]; | |
2226 | sense_data[4] = sbp2_status[13]; | |
2227 | sense_data[5] = sbp2_status[14]; | |
2228 | sense_data[6] = sbp2_status[15]; | |
2229 | sense_data[7] = 10; | |
2230 | sense_data[8] = sbp2_status[16]; | |
2231 | sense_data[9] = sbp2_status[17]; | |
2232 | sense_data[10] = sbp2_status[18]; | |
2233 | sense_data[11] = sbp2_status[19]; | |
2234 | sense_data[12] = sbp2_status[10]; | |
2235 | sense_data[13] = sbp2_status[11]; | |
2236 | sense_data[14] = sbp2_status[20]; | |
2237 | sense_data[15] = sbp2_status[21]; | |
2238 | ||
2239 | return(sbp2_status[8] & 0x3f); /* return scsi status */ | |
2240 | } | |
2241 | ||
2242 | /* | |
2243 | * This function is called after a command is completed, in order to do any necessary SBP-2 | |
2244 | * response data translations for the SCSI stack | |
2245 | */ | |
2246 | static void sbp2_check_sbp2_response(struct scsi_id_instance_data *scsi_id, | |
2247 | struct scsi_cmnd *SCpnt) | |
2248 | { | |
2249 | u8 *scsi_buf = SCpnt->request_buffer; | |
2250 | u8 device_type = SBP2_DEVICE_TYPE (scsi_id->sbp2_device_type_and_lun); | |
2251 | ||
2252 | SBP2_DEBUG("sbp2_check_sbp2_response"); | |
2253 | ||
2254 | switch (SCpnt->cmnd[0]) { | |
2255 | ||
2256 | case INQUIRY: | |
2257 | ||
2258 | /* | |
2259 | * If scsi_id->sbp2_device_type_and_lun is uninitialized, then fill | |
2260 | * this information in from the inquiry response data. Lun is set to zero. | |
2261 | */ | |
2262 | if (scsi_id->sbp2_device_type_and_lun == SBP2_DEVICE_TYPE_LUN_UNINITIALIZED) { | |
2263 | SBP2_DEBUG("Creating sbp2_device_type_and_lun from scsi inquiry data"); | |
2264 | scsi_id->sbp2_device_type_and_lun = (scsi_buf[0] & 0x1f) << 16; | |
2265 | } | |
2266 | ||
2267 | /* | |
2268 | * Make sure data length is ok. Minimum length is 36 bytes | |
2269 | */ | |
2270 | if (scsi_buf[4] == 0) { | |
2271 | scsi_buf[4] = 36 - 5; | |
2272 | } | |
2273 | ||
2274 | /* | |
2275 | * Check for Simple Direct Access Device and change it to TYPE_DISK | |
2276 | */ | |
2277 | if ((scsi_buf[0] & 0x1f) == TYPE_SDAD) { | |
2278 | SBP2_DEBUG("Changing TYPE_SDAD to TYPE_DISK"); | |
2279 | scsi_buf[0] &= 0xe0; | |
2280 | } | |
2281 | ||
2282 | /* | |
2283 | * Fix ansi revision and response data format | |
2284 | */ | |
2285 | scsi_buf[2] |= 2; | |
2286 | scsi_buf[3] = (scsi_buf[3] & 0xf0) | 2; | |
2287 | ||
2288 | break; | |
2289 | ||
2290 | case MODE_SENSE: | |
2291 | ||
2292 | if (sbp2_command_conversion_device_type(device_type)) { | |
2293 | ||
2294 | SBP2_DEBUG("Modify mode sense response (10 byte version)"); | |
2295 | ||
2296 | scsi_buf[0] = scsi_buf[1]; /* Mode data length */ | |
2297 | scsi_buf[1] = scsi_buf[2]; /* Medium type */ | |
2298 | scsi_buf[2] = scsi_buf[3]; /* Device specific parameter */ | |
2299 | scsi_buf[3] = scsi_buf[7]; /* Block descriptor length */ | |
2300 | memcpy(scsi_buf + 4, scsi_buf + 8, scsi_buf[0]); | |
2301 | } | |
2302 | ||
2303 | break; | |
2304 | ||
2305 | case MODE_SELECT: | |
2306 | ||
2307 | /* | |
2308 | * TODO. Probably need to change mode select to 10 byte version | |
2309 | */ | |
2310 | ||
2311 | default: | |
2312 | break; | |
2313 | } | |
2314 | return; | |
2315 | } | |
2316 | ||
2317 | /* | |
2318 | * This function deals with status writes from the SBP-2 device | |
2319 | */ | |
2320 | static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, int destid, | |
2321 | quadlet_t *data, u64 addr, size_t length, u16 fl) | |
2322 | { | |
2323 | struct sbp2scsi_host_info *hi; | |
2324 | struct scsi_id_instance_data *scsi_id = NULL, *scsi_id_tmp; | |
2325 | u32 id; | |
2326 | struct scsi_cmnd *SCpnt = NULL; | |
2327 | u32 scsi_status = SBP2_SCSI_STATUS_GOOD; | |
2328 | struct sbp2_command_info *command; | |
2329 | ||
2330 | SBP2_DEBUG("sbp2_handle_status_write"); | |
2331 | ||
2332 | sbp2util_packet_dump(data, length, "sbp2 status write by device", (u32)addr); | |
2333 | ||
2334 | if (!host) { | |
2335 | SBP2_ERR("host is NULL - this is bad!"); | |
2336 | return(RCODE_ADDRESS_ERROR); | |
2337 | } | |
2338 | ||
2339 | hi = hpsb_get_hostinfo(&sbp2_highlevel, host); | |
2340 | ||
2341 | if (!hi) { | |
2342 | SBP2_ERR("host info is NULL - this is bad!"); | |
2343 | return(RCODE_ADDRESS_ERROR); | |
2344 | } | |
2345 | ||
2346 | /* | |
2347 | * Find our scsi_id structure by looking at the status fifo address written to by | |
2348 | * the sbp2 device. | |
2349 | */ | |
2350 | id = SBP2_STATUS_FIFO_OFFSET_TO_ENTRY((u32)(addr - SBP2_STATUS_FIFO_ADDRESS)); | |
2351 | list_for_each_entry(scsi_id_tmp, &hi->scsi_ids, scsi_list) { | |
2352 | if (scsi_id_tmp->ne->nodeid == nodeid && scsi_id_tmp->ud->id == id) { | |
2353 | scsi_id = scsi_id_tmp; | |
2354 | break; | |
2355 | } | |
2356 | } | |
2357 | ||
2358 | if (!scsi_id) { | |
2359 | SBP2_ERR("scsi_id is NULL - device is gone?"); | |
2360 | return(RCODE_ADDRESS_ERROR); | |
2361 | } | |
2362 | ||
2363 | /* | |
2364 | * Put response into scsi_id status fifo... | |
2365 | */ | |
2366 | memcpy(&scsi_id->status_block, data, length); | |
2367 | ||
2368 | /* | |
2369 | * Byte swap first two quadlets (8 bytes) of status for processing | |
2370 | */ | |
2371 | sbp2util_be32_to_cpu_buffer(&scsi_id->status_block, 8); | |
2372 | ||
2373 | /* | |
2374 | * Handle command ORB status here if necessary. First, need to match status with command. | |
2375 | */ | |
2376 | command = sbp2util_find_command_for_orb(scsi_id, scsi_id->status_block.ORB_offset_lo); | |
2377 | if (command) { | |
2378 | ||
2379 | SBP2_DEBUG("Found status for command ORB"); | |
2380 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma, | |
2381 | sizeof(struct sbp2_command_orb), | |
2382 | PCI_DMA_BIDIRECTIONAL); | |
2383 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma, | |
2384 | sizeof(command->scatter_gather_element), | |
2385 | PCI_DMA_BIDIRECTIONAL); | |
2386 | ||
2387 | SBP2_ORB_DEBUG("matched command orb %p", &command->command_orb); | |
2388 | outstanding_orb_decr; | |
2389 | ||
2390 | /* | |
2391 | * Matched status with command, now grab scsi command pointers and check status | |
2392 | */ | |
2393 | SCpnt = command->Current_SCpnt; | |
2394 | sbp2util_mark_command_completed(scsi_id, command); | |
2395 | ||
2396 | if (SCpnt) { | |
2397 | ||
2398 | /* | |
2399 | * See if the target stored any scsi status information | |
2400 | */ | |
2401 | if (STATUS_GET_LENGTH(scsi_id->status_block.ORB_offset_hi_misc) > 1) { | |
2402 | /* | |
2403 | * Translate SBP-2 status to SCSI sense data | |
2404 | */ | |
2405 | SBP2_DEBUG("CHECK CONDITION"); | |
2406 | scsi_status = sbp2_status_to_sense_data((unchar *)&scsi_id->status_block, SCpnt->sense_buffer); | |
2407 | } | |
2408 | ||
2409 | /* | |
2410 | * Check to see if the dead bit is set. If so, we'll have to initiate | |
2411 | * a fetch agent reset. | |
2412 | */ | |
2413 | if (STATUS_GET_DEAD_BIT(scsi_id->status_block.ORB_offset_hi_misc)) { | |
2414 | ||
2415 | /* | |
2416 | * Initiate a fetch agent reset. | |
2417 | */ | |
2418 | SBP2_DEBUG("Dead bit set - initiating fetch agent reset"); | |
2419 | sbp2_agent_reset(scsi_id, 0); | |
2420 | } | |
2421 | ||
2422 | SBP2_ORB_DEBUG("completing command orb %p", &command->command_orb); | |
2423 | } | |
2424 | ||
2425 | /* | |
2426 | * Check here to see if there are no commands in-use. If there are none, we can | |
2427 | * null out last orb so that next time around we write directly to the orb pointer... | |
2428 | * Quick start saves one 1394 bus transaction. | |
2429 | */ | |
2430 | if (list_empty(&scsi_id->sbp2_command_orb_inuse)) { | |
2431 | scsi_id->last_orb = NULL; | |
2432 | } | |
2433 | ||
2434 | } else { | |
2435 | ||
2436 | /* | |
2437 | * It's probably a login/logout/reconnect status. | |
2438 | */ | |
2439 | if ((scsi_id->login_orb_dma == scsi_id->status_block.ORB_offset_lo) || | |
2440 | (scsi_id->query_logins_orb_dma == scsi_id->status_block.ORB_offset_lo) || | |
2441 | (scsi_id->reconnect_orb_dma == scsi_id->status_block.ORB_offset_lo) || | |
2442 | (scsi_id->logout_orb_dma == scsi_id->status_block.ORB_offset_lo)) { | |
2443 | atomic_set(&scsi_id->sbp2_login_complete, 1); | |
2444 | } | |
2445 | } | |
2446 | ||
2447 | if (SCpnt) { | |
2448 | ||
2449 | /* Complete the SCSI command. */ | |
2450 | SBP2_DEBUG("Completing SCSI command"); | |
2451 | sbp2scsi_complete_command(scsi_id, scsi_status, SCpnt, | |
2452 | command->Current_done); | |
2453 | SBP2_ORB_DEBUG("command orb completed"); | |
2454 | } | |
2455 | ||
2456 | return(RCODE_COMPLETE); | |
2457 | } | |
2458 | ||
2459 | ||
2460 | /************************************** | |
2461 | * SCSI interface related section | |
2462 | **************************************/ | |
2463 | ||
2464 | /* | |
2465 | * This routine is the main request entry routine for doing I/O. It is | |
2466 | * called from the scsi stack directly. | |
2467 | */ | |
2468 | static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt, | |
2469 | void (*done)(struct scsi_cmnd *)) | |
2470 | { | |
2471 | struct scsi_id_instance_data *scsi_id = | |
2472 | (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; | |
2473 | struct sbp2scsi_host_info *hi; | |
2474 | ||
2475 | SBP2_DEBUG("sbp2scsi_queuecommand"); | |
2476 | ||
2477 | /* | |
2478 | * If scsi_id is null, it means there is no device in this slot, | |
2479 | * so we should return selection timeout. | |
2480 | */ | |
2481 | if (!scsi_id) { | |
2482 | SCpnt->result = DID_NO_CONNECT << 16; | |
2483 | done (SCpnt); | |
2484 | return 0; | |
2485 | } | |
2486 | ||
2487 | hi = scsi_id->hi; | |
2488 | ||
2489 | if (!hi) { | |
2490 | SBP2_ERR("sbp2scsi_host_info is NULL - this is bad!"); | |
2491 | SCpnt->result = DID_NO_CONNECT << 16; | |
2492 | done (SCpnt); | |
2493 | return(0); | |
2494 | } | |
2495 | ||
2496 | /* | |
2497 | * Until we handle multiple luns, just return selection time-out | |
2498 | * to any IO directed at non-zero LUNs | |
2499 | */ | |
2500 | if (SCpnt->device->lun) { | |
2501 | SCpnt->result = DID_NO_CONNECT << 16; | |
2502 | done (SCpnt); | |
2503 | return(0); | |
2504 | } | |
2505 | ||
2506 | /* | |
2507 | * Check for request sense command, and handle it here | |
2508 | * (autorequest sense) | |
2509 | */ | |
2510 | if (SCpnt->cmnd[0] == REQUEST_SENSE) { | |
2511 | SBP2_DEBUG("REQUEST_SENSE"); | |
2512 | memcpy(SCpnt->request_buffer, SCpnt->sense_buffer, SCpnt->request_bufflen); | |
2513 | memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer)); | |
2514 | sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_GOOD, SCpnt, done); | |
2515 | return(0); | |
2516 | } | |
2517 | ||
2518 | /* | |
2519 | * Check to see if we are in the middle of a bus reset. | |
2520 | */ | |
2521 | if (!hpsb_node_entry_valid(scsi_id->ne)) { | |
2522 | SBP2_ERR("Bus reset in progress - rejecting command"); | |
2523 | SCpnt->result = DID_BUS_BUSY << 16; | |
2524 | done (SCpnt); | |
2525 | return(0); | |
2526 | } | |
2527 | ||
2528 | /* | |
2529 | * Try and send our SCSI command | |
2530 | */ | |
2531 | if (sbp2_send_command(scsi_id, SCpnt, done)) { | |
2532 | SBP2_ERR("Error sending SCSI command"); | |
2533 | sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_SELECTION_TIMEOUT, | |
2534 | SCpnt, done); | |
2535 | } | |
2536 | ||
2537 | return(0); | |
2538 | } | |
2539 | ||
2540 | /* | |
2541 | * This function is called in order to complete all outstanding SBP-2 | |
2542 | * commands (in case of resets, etc.). | |
2543 | */ | |
2544 | static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id, | |
2545 | u32 status) | |
2546 | { | |
2547 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
2548 | struct list_head *lh; | |
2549 | struct sbp2_command_info *command; | |
2550 | ||
2551 | SBP2_DEBUG("sbp2scsi_complete_all_commands"); | |
2552 | ||
2553 | while (!list_empty(&scsi_id->sbp2_command_orb_inuse)) { | |
2554 | SBP2_DEBUG("Found pending command to complete"); | |
2555 | lh = scsi_id->sbp2_command_orb_inuse.next; | |
2556 | command = list_entry(lh, struct sbp2_command_info, list); | |
2557 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma, | |
2558 | sizeof(struct sbp2_command_orb), | |
2559 | PCI_DMA_BIDIRECTIONAL); | |
2560 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma, | |
2561 | sizeof(command->scatter_gather_element), | |
2562 | PCI_DMA_BIDIRECTIONAL); | |
2563 | sbp2util_mark_command_completed(scsi_id, command); | |
2564 | if (command->Current_SCpnt) { | |
2565 | command->Current_SCpnt->result = status << 16; | |
2566 | command->Current_done(command->Current_SCpnt); | |
2567 | } | |
2568 | } | |
2569 | ||
2570 | return; | |
2571 | } | |
2572 | ||
2573 | /* | |
2574 | * This function is called in order to complete a regular SBP-2 command. | |
2575 | * | |
2576 | * This can be called in interrupt context. | |
2577 | */ | |
2578 | static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id, | |
2579 | u32 scsi_status, struct scsi_cmnd *SCpnt, | |
2580 | void (*done)(struct scsi_cmnd *)) | |
2581 | { | |
2582 | unsigned long flags; | |
2583 | ||
2584 | SBP2_DEBUG("sbp2scsi_complete_command"); | |
2585 | ||
2586 | /* | |
2587 | * Sanity | |
2588 | */ | |
2589 | if (!SCpnt) { | |
2590 | SBP2_ERR("SCpnt is NULL"); | |
2591 | return; | |
2592 | } | |
2593 | ||
2594 | /* | |
2595 | * If a bus reset is in progress and there was an error, don't | |
2596 | * complete the command, just let it get retried at the end of the | |
2597 | * bus reset. | |
2598 | */ | |
2599 | if (!hpsb_node_entry_valid(scsi_id->ne) && (scsi_status != SBP2_SCSI_STATUS_GOOD)) { | |
2600 | SBP2_ERR("Bus reset in progress - retry command later"); | |
2601 | return; | |
2602 | } | |
2603 | ||
2604 | /* | |
2605 | * Switch on scsi status | |
2606 | */ | |
2607 | switch (scsi_status) { | |
2608 | case SBP2_SCSI_STATUS_GOOD: | |
2609 | SCpnt->result = DID_OK; | |
2610 | break; | |
2611 | ||
2612 | case SBP2_SCSI_STATUS_BUSY: | |
2613 | SBP2_ERR("SBP2_SCSI_STATUS_BUSY"); | |
2614 | SCpnt->result = DID_BUS_BUSY << 16; | |
2615 | break; | |
2616 | ||
2617 | case SBP2_SCSI_STATUS_CHECK_CONDITION: | |
2618 | SBP2_DEBUG("SBP2_SCSI_STATUS_CHECK_CONDITION"); | |
2619 | SCpnt->result = CHECK_CONDITION << 1; | |
2620 | ||
2621 | /* | |
2622 | * Debug stuff | |
2623 | */ | |
2624 | #if CONFIG_IEEE1394_SBP2_DEBUG >= 1 | |
2625 | scsi_print_command(SCpnt); | |
2626 | scsi_print_sense("bh", SCpnt); | |
2627 | #endif | |
2628 | ||
2629 | break; | |
2630 | ||
2631 | case SBP2_SCSI_STATUS_SELECTION_TIMEOUT: | |
2632 | SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT"); | |
2633 | SCpnt->result = DID_NO_CONNECT << 16; | |
2634 | scsi_print_command(SCpnt); | |
2635 | break; | |
2636 | ||
2637 | case SBP2_SCSI_STATUS_CONDITION_MET: | |
2638 | case SBP2_SCSI_STATUS_RESERVATION_CONFLICT: | |
2639 | case SBP2_SCSI_STATUS_COMMAND_TERMINATED: | |
2640 | SBP2_ERR("Bad SCSI status = %x", scsi_status); | |
2641 | SCpnt->result = DID_ERROR << 16; | |
2642 | scsi_print_command(SCpnt); | |
2643 | break; | |
2644 | ||
2645 | default: | |
2646 | SBP2_ERR("Unsupported SCSI status = %x", scsi_status); | |
2647 | SCpnt->result = DID_ERROR << 16; | |
2648 | } | |
2649 | ||
2650 | /* | |
2651 | * Take care of any sbp2 response data mucking here (RBC stuff, etc.) | |
2652 | */ | |
2653 | if (SCpnt->result == DID_OK) { | |
2654 | sbp2_check_sbp2_response(scsi_id, SCpnt); | |
2655 | } | |
2656 | ||
2657 | /* | |
2658 | * If a bus reset is in progress and there was an error, complete | |
2659 | * the command as busy so that it will get retried. | |
2660 | */ | |
2661 | if (!hpsb_node_entry_valid(scsi_id->ne) && (scsi_status != SBP2_SCSI_STATUS_GOOD)) { | |
2662 | SBP2_ERR("Completing command with busy (bus reset)"); | |
2663 | SCpnt->result = DID_BUS_BUSY << 16; | |
2664 | } | |
2665 | ||
2666 | /* | |
2667 | * If a unit attention occurs, return busy status so it gets | |
2668 | * retried... it could have happened because of a 1394 bus reset | |
2669 | * or hot-plug... | |
2670 | */ | |
2671 | #if 0 | |
2672 | if ((scsi_status == SBP2_SCSI_STATUS_CHECK_CONDITION) && | |
2673 | (SCpnt->sense_buffer[2] == UNIT_ATTENTION)) { | |
2674 | SBP2_DEBUG("UNIT ATTENTION - return busy"); | |
2675 | SCpnt->result = DID_BUS_BUSY << 16; | |
2676 | } | |
2677 | #endif | |
2678 | ||
2679 | /* | |
2680 | * Tell scsi stack that we're done with this command | |
2681 | */ | |
2682 | spin_lock_irqsave(scsi_id->scsi_host->host_lock,flags); | |
2683 | done (SCpnt); | |
2684 | spin_unlock_irqrestore(scsi_id->scsi_host->host_lock,flags); | |
2685 | ||
2686 | return; | |
2687 | } | |
2688 | ||
2689 | ||
2690 | static int sbp2scsi_slave_configure (struct scsi_device *sdev) | |
2691 | { | |
2692 | blk_queue_dma_alignment(sdev->request_queue, (512 - 1)); | |
2693 | ||
2694 | return 0; | |
2695 | } | |
2696 | ||
2697 | ||
2698 | /* | |
2699 | * Called by scsi stack when something has really gone wrong. Usually | |
2700 | * called when a command has timed-out for some reason. | |
2701 | */ | |
2702 | static int sbp2scsi_abort(struct scsi_cmnd *SCpnt) | |
2703 | { | |
2704 | struct scsi_id_instance_data *scsi_id = | |
2705 | (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; | |
2706 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
2707 | struct sbp2_command_info *command; | |
2708 | ||
2709 | SBP2_ERR("aborting sbp2 command"); | |
2710 | scsi_print_command(SCpnt); | |
2711 | ||
2712 | if (scsi_id) { | |
2713 | ||
2714 | /* | |
2715 | * Right now, just return any matching command structures | |
2716 | * to the free pool. | |
2717 | */ | |
2718 | command = sbp2util_find_command_for_SCpnt(scsi_id, SCpnt); | |
2719 | if (command) { | |
2720 | SBP2_DEBUG("Found command to abort"); | |
2721 | pci_dma_sync_single_for_cpu(hi->host->pdev, | |
2722 | command->command_orb_dma, | |
2723 | sizeof(struct sbp2_command_orb), | |
2724 | PCI_DMA_BIDIRECTIONAL); | |
2725 | pci_dma_sync_single_for_cpu(hi->host->pdev, | |
2726 | command->sge_dma, | |
2727 | sizeof(command->scatter_gather_element), | |
2728 | PCI_DMA_BIDIRECTIONAL); | |
2729 | sbp2util_mark_command_completed(scsi_id, command); | |
2730 | if (command->Current_SCpnt) { | |
2731 | command->Current_SCpnt->result = DID_ABORT << 16; | |
2732 | command->Current_done(command->Current_SCpnt); | |
2733 | } | |
2734 | } | |
2735 | ||
2736 | /* | |
2737 | * Initiate a fetch agent reset. | |
2738 | */ | |
2739 | sbp2_agent_reset(scsi_id, 0); | |
2740 | sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY); | |
2741 | } | |
2742 | ||
2743 | return(SUCCESS); | |
2744 | } | |
2745 | ||
2746 | /* | |
2747 | * Called by scsi stack when something has really gone wrong. | |
2748 | */ | |
2749 | static int sbp2scsi_reset(struct scsi_cmnd *SCpnt) | |
2750 | { | |
2751 | struct scsi_id_instance_data *scsi_id = | |
2752 | (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; | |
2753 | ||
2754 | SBP2_ERR("reset requested"); | |
2755 | ||
2756 | if (scsi_id) { | |
2757 | SBP2_ERR("Generating sbp2 fetch agent reset"); | |
2758 | sbp2_agent_reset(scsi_id, 0); | |
2759 | } | |
2760 | ||
2761 | return(SUCCESS); | |
2762 | } | |
2763 | ||
2764 | static const char *sbp2scsi_info (struct Scsi_Host *host) | |
2765 | { | |
2766 | return "SCSI emulation for IEEE-1394 SBP-2 Devices"; | |
2767 | } | |
2768 | ||
2769 | static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev, char *buf) | |
2770 | { | |
2771 | struct scsi_device *sdev; | |
2772 | struct scsi_id_instance_data *scsi_id; | |
2773 | int lun; | |
2774 | ||
2775 | if (!(sdev = to_scsi_device(dev))) | |
2776 | return 0; | |
2777 | ||
2778 | if (!(scsi_id = (struct scsi_id_instance_data *)sdev->host->hostdata[0])) | |
2779 | return 0; | |
2780 | ||
2781 | if (scsi_id->sbp2_device_type_and_lun == SBP2_DEVICE_TYPE_LUN_UNINITIALIZED) | |
2782 | lun = 0; | |
2783 | else | |
2784 | lun = ORB_SET_LUN(scsi_id->sbp2_device_type_and_lun); | |
2785 | ||
2786 | return sprintf(buf, "%016Lx:%d:%d\n", (unsigned long long)scsi_id->ne->guid, | |
2787 | scsi_id->ud->id, lun); | |
2788 | } | |
2789 | static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); | |
2790 | ||
2791 | static struct device_attribute *sbp2_sysfs_sdev_attrs[] = { | |
2792 | &dev_attr_ieee1394_id, | |
2793 | NULL | |
2794 | }; | |
2795 | ||
2796 | MODULE_AUTHOR("Ben Collins <bcollins@debian.org>"); | |
2797 | MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver"); | |
2798 | MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME); | |
2799 | MODULE_LICENSE("GPL"); | |
2800 | ||
2801 | /* SCSI host template */ | |
2802 | static struct scsi_host_template scsi_driver_template = { | |
2803 | .module = THIS_MODULE, | |
2804 | .name = "SBP-2 IEEE-1394", | |
2805 | .proc_name = SBP2_DEVICE_NAME, | |
2806 | .info = sbp2scsi_info, | |
2807 | .queuecommand = sbp2scsi_queuecommand, | |
2808 | .eh_abort_handler = sbp2scsi_abort, | |
2809 | .eh_device_reset_handler = sbp2scsi_reset, | |
2810 | .eh_bus_reset_handler = sbp2scsi_reset, | |
2811 | .eh_host_reset_handler = sbp2scsi_reset, | |
2812 | .slave_configure = sbp2scsi_slave_configure, | |
2813 | .this_id = -1, | |
2814 | .sg_tablesize = SG_ALL, | |
2815 | .use_clustering = ENABLE_CLUSTERING, | |
2816 | .cmd_per_lun = SBP2_MAX_CMDS, | |
2817 | .can_queue = SBP2_MAX_CMDS, | |
2818 | .emulated = 1, | |
2819 | .sdev_attrs = sbp2_sysfs_sdev_attrs, | |
2820 | }; | |
2821 | ||
2822 | static int sbp2_module_init(void) | |
2823 | { | |
2824 | int ret; | |
2825 | ||
2826 | SBP2_DEBUG("sbp2_module_init"); | |
2827 | ||
2828 | printk(KERN_INFO "sbp2: %s\n", version); | |
2829 | ||
2830 | /* Module load debug option to force one command at a time (serializing I/O) */ | |
2831 | if (serialize_io) { | |
2832 | SBP2_ERR("Driver forced to serialize I/O (serialize_io = 1)"); | |
2833 | scsi_driver_template.can_queue = 1; | |
2834 | scsi_driver_template.cmd_per_lun = 1; | |
2835 | } | |
2836 | ||
2837 | /* Set max sectors (module load option). Default is 255 sectors. */ | |
2838 | scsi_driver_template.max_sectors = max_sectors; | |
2839 | ||
2840 | ||
2841 | /* Register our high level driver with 1394 stack */ | |
2842 | hpsb_register_highlevel(&sbp2_highlevel); | |
2843 | ||
2844 | ret = hpsb_register_protocol(&sbp2_driver); | |
2845 | if (ret) { | |
2846 | SBP2_ERR("Failed to register protocol"); | |
2847 | hpsb_unregister_highlevel(&sbp2_highlevel); | |
2848 | return ret; | |
2849 | } | |
2850 | ||
2851 | return 0; | |
2852 | } | |
2853 | ||
2854 | static void __exit sbp2_module_exit(void) | |
2855 | { | |
2856 | SBP2_DEBUG("sbp2_module_exit"); | |
2857 | ||
2858 | hpsb_unregister_protocol(&sbp2_driver); | |
2859 | ||
2860 | hpsb_unregister_highlevel(&sbp2_highlevel); | |
2861 | } | |
2862 | ||
2863 | module_init(sbp2_module_init); | |
2864 | module_exit(sbp2_module_exit); |