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 | ||
902abed1 SR |
41 | #include <linux/blkdev.h> |
42 | #include <linux/compiler.h> | |
43 | #include <linux/delay.h> | |
44 | #include <linux/device.h> | |
45 | #include <linux/dma-mapping.h> | |
46 | #include <linux/gfp.h> | |
47 | #include <linux/init.h> | |
1da177e4 LT |
48 | #include <linux/kernel.h> |
49 | #include <linux/list.h> | |
1da177e4 LT |
50 | #include <linux/module.h> |
51 | #include <linux/moduleparam.h> | |
1da177e4 | 52 | #include <linux/pci.h> |
902abed1 SR |
53 | #include <linux/slab.h> |
54 | #include <linux/spinlock.h> | |
55 | #include <linux/stat.h> | |
56 | #include <linux/string.h> | |
57 | #include <linux/stringify.h> | |
58 | #include <linux/types.h> | |
e8398bb7 | 59 | #include <linux/wait.h> |
1da177e4 | 60 | |
1da177e4 | 61 | #include <asm/byteorder.h> |
902abed1 SR |
62 | #include <asm/errno.h> |
63 | #include <asm/param.h> | |
1da177e4 | 64 | #include <asm/scatterlist.h> |
902abed1 SR |
65 | #include <asm/system.h> |
66 | #include <asm/types.h> | |
67 | ||
68 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA | |
69 | #include <asm/io.h> /* for bus_to_virt */ | |
70 | #endif | |
1da177e4 LT |
71 | |
72 | #include <scsi/scsi.h> | |
73 | #include <scsi/scsi_cmnd.h> | |
74 | #include <scsi/scsi_dbg.h> | |
75 | #include <scsi/scsi_device.h> | |
76 | #include <scsi/scsi_host.h> | |
77 | ||
78 | #include "csr1212.h" | |
902abed1 SR |
79 | #include "highlevel.h" |
80 | #include "hosts.h" | |
1da177e4 | 81 | #include "ieee1394.h" |
1da177e4 | 82 | #include "ieee1394_core.h" |
902abed1 | 83 | #include "ieee1394_hotplug.h" |
1da177e4 | 84 | #include "ieee1394_transactions.h" |
902abed1 SR |
85 | #include "ieee1394_types.h" |
86 | #include "nodemgr.h" | |
1da177e4 LT |
87 | #include "sbp2.h" |
88 | ||
1da177e4 LT |
89 | /* |
90 | * Module load parameter definitions | |
91 | */ | |
92 | ||
93 | /* | |
94 | * Change max_speed on module load if you have a bad IEEE-1394 | |
95 | * controller that has trouble running 2KB packets at 400mb. | |
96 | * | |
97 | * NOTE: On certain OHCI parts I have seen short packets on async transmit | |
98 | * (probably due to PCI latency/throughput issues with the part). You can | |
99 | * bump down the speed if you are running into problems. | |
100 | */ | |
101 | static int max_speed = IEEE1394_SPEED_MAX; | |
102 | module_param(max_speed, int, 0644); | |
2bab359a | 103 | MODULE_PARM_DESC(max_speed, "Force max speed (3 = 800mb, 2 = 400mb, 1 = 200mb, 0 = 100mb)"); |
1da177e4 LT |
104 | |
105 | /* | |
106 | * Set serialize_io to 1 if you'd like only one scsi command sent | |
107 | * down to us at a time (debugging). This might be necessary for very | |
108 | * badly behaved sbp2 devices. | |
2bab359a JM |
109 | * |
110 | * TODO: Make this configurable per device. | |
1da177e4 | 111 | */ |
2bab359a | 112 | static int serialize_io = 1; |
1da177e4 | 113 | module_param(serialize_io, int, 0444); |
2bab359a | 114 | MODULE_PARM_DESC(serialize_io, "Serialize I/O coming from scsi drivers (default = 1, faster = 0)"); |
1da177e4 LT |
115 | |
116 | /* | |
117 | * Bump up max_sectors if you'd like to support very large sized | |
118 | * transfers. Please note that some older sbp2 bridge chips are broken for | |
119 | * transfers greater or equal to 128KB. Default is a value of 255 | |
120 | * sectors, or just under 128KB (at 512 byte sector size). I can note that | |
121 | * the Oxsemi sbp2 chipsets have no problems supporting very large | |
122 | * transfer sizes. | |
123 | */ | |
124 | static int max_sectors = SBP2_MAX_SECTORS; | |
125 | module_param(max_sectors, int, 0444); | |
24d3bf88 SR |
126 | MODULE_PARM_DESC(max_sectors, "Change max sectors per I/O supported (default = " |
127 | __stringify(SBP2_MAX_SECTORS) ")"); | |
1da177e4 LT |
128 | |
129 | /* | |
130 | * Exclusive login to sbp2 device? In most cases, the sbp2 driver should | |
131 | * do an exclusive login, as it's generally unsafe to have two hosts | |
132 | * talking to a single sbp2 device at the same time (filesystem coherency, | |
133 | * etc.). If you're running an sbp2 device that supports multiple logins, | |
134 | * and you're either running read-only filesystems or some sort of special | |
20f45781 BC |
135 | * filesystem supporting multiple hosts, e.g. OpenGFS, Oracle Cluster |
136 | * File System, or Lustre, then set exclusive_login to zero. | |
137 | * | |
138 | * So far only bridges from Oxford Semiconductor are known to support | |
139 | * concurrent logins. Depending on firmware, four or two concurrent logins | |
140 | * are possible on OXFW911 and newer Oxsemi bridges. | |
1da177e4 LT |
141 | */ |
142 | static int exclusive_login = 1; | |
143 | module_param(exclusive_login, int, 0644); | |
144 | MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device (default = 1)"); | |
145 | ||
146 | /* | |
24d3bf88 SR |
147 | * If any of the following workarounds is required for your device to work, |
148 | * please submit the kernel messages logged by sbp2 to the linux1394-devel | |
149 | * mailing list. | |
1da177e4 | 150 | * |
24d3bf88 SR |
151 | * - 128kB max transfer |
152 | * Limit transfer size. Necessary for some old bridges. | |
153 | * | |
154 | * - 36 byte inquiry | |
155 | * When scsi_mod probes the device, let the inquiry command look like that | |
156 | * from MS Windows. | |
157 | * | |
158 | * - skip mode page 8 | |
159 | * Suppress sending of mode_sense for mode page 8 if the device pretends to | |
160 | * support the SCSI Primary Block commands instead of Reduced Block Commands. | |
e9a1c52c SR |
161 | * |
162 | * - fix capacity | |
163 | * Tell sd_mod to correct the last sector number reported by read_capacity. | |
164 | * Avoids access beyond actual disk limits on devices with an off-by-one bug. | |
165 | * Don't use this with devices which don't have this bug. | |
679c0cd2 SR |
166 | * |
167 | * - override internal blacklist | |
168 | * Instead of adding to the built-in blacklist, use only the workarounds | |
169 | * specified in the module load parameter. | |
170 | * Useful if a blacklist entry interfered with a non-broken device. | |
1da177e4 | 171 | */ |
24d3bf88 SR |
172 | static int sbp2_default_workarounds; |
173 | module_param_named(workarounds, sbp2_default_workarounds, int, 0644); | |
174 | MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0" | |
175 | ", 128kB max transfer = " __stringify(SBP2_WORKAROUND_128K_MAX_TRANS) | |
176 | ", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36) | |
177 | ", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8) | |
e9a1c52c | 178 | ", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY) |
679c0cd2 | 179 | ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE) |
24d3bf88 SR |
180 | ", or a combination)"); |
181 | ||
1da177e4 LT |
182 | /* |
183 | * Export information about protocols/devices supported by this driver. | |
184 | */ | |
185 | static struct ieee1394_device_id sbp2_id_table[] = { | |
186 | { | |
a237f35f SR |
187 | .match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION, |
188 | .specifier_id = SBP2_UNIT_SPEC_ID_ENTRY & 0xffffff, | |
189 | .version = SBP2_SW_VERSION_ENTRY & 0xffffff}, | |
190 | {} | |
1da177e4 LT |
191 | }; |
192 | ||
193 | MODULE_DEVICE_TABLE(ieee1394, sbp2_id_table); | |
194 | ||
195 | /* | |
196 | * Debug levels, configured via kernel config, or enable here. | |
197 | */ | |
198 | ||
44456d37 | 199 | #define CONFIG_IEEE1394_SBP2_DEBUG 0 |
1da177e4 LT |
200 | /* #define CONFIG_IEEE1394_SBP2_DEBUG_ORBS */ |
201 | /* #define CONFIG_IEEE1394_SBP2_DEBUG_DMA */ | |
202 | /* #define CONFIG_IEEE1394_SBP2_DEBUG 1 */ | |
203 | /* #define CONFIG_IEEE1394_SBP2_DEBUG 2 */ | |
204 | /* #define CONFIG_IEEE1394_SBP2_PACKET_DUMP */ | |
205 | ||
206 | #ifdef CONFIG_IEEE1394_SBP2_DEBUG_ORBS | |
207 | #define SBP2_ORB_DEBUG(fmt, args...) HPSB_ERR("sbp2(%s): "fmt, __FUNCTION__, ## args) | |
208 | static u32 global_outstanding_command_orbs = 0; | |
209 | #define outstanding_orb_incr global_outstanding_command_orbs++ | |
210 | #define outstanding_orb_decr global_outstanding_command_orbs-- | |
211 | #else | |
611aa19f SR |
212 | #define SBP2_ORB_DEBUG(fmt, args...) do {} while (0) |
213 | #define outstanding_orb_incr do {} while (0) | |
214 | #define outstanding_orb_decr do {} while (0) | |
1da177e4 LT |
215 | #endif |
216 | ||
217 | #ifdef CONFIG_IEEE1394_SBP2_DEBUG_DMA | |
218 | #define SBP2_DMA_ALLOC(fmt, args...) \ | |
219 | HPSB_ERR("sbp2(%s)alloc(%d): "fmt, __FUNCTION__, \ | |
220 | ++global_outstanding_dmas, ## args) | |
221 | #define SBP2_DMA_FREE(fmt, args...) \ | |
222 | HPSB_ERR("sbp2(%s)free(%d): "fmt, __FUNCTION__, \ | |
223 | --global_outstanding_dmas, ## args) | |
224 | static u32 global_outstanding_dmas = 0; | |
225 | #else | |
611aa19f SR |
226 | #define SBP2_DMA_ALLOC(fmt, args...) do {} while (0) |
227 | #define SBP2_DMA_FREE(fmt, args...) do {} while (0) | |
1da177e4 LT |
228 | #endif |
229 | ||
230 | #if CONFIG_IEEE1394_SBP2_DEBUG >= 2 | |
231 | #define SBP2_DEBUG(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
232 | #define SBP2_INFO(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
233 | #define SBP2_NOTICE(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
234 | #define SBP2_WARN(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
235 | #elif CONFIG_IEEE1394_SBP2_DEBUG == 1 | |
236 | #define SBP2_DEBUG(fmt, args...) HPSB_DEBUG("sbp2: "fmt, ## args) | |
237 | #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args) | |
238 | #define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args) | |
239 | #define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args) | |
240 | #else | |
611aa19f | 241 | #define SBP2_DEBUG(fmt, args...) do {} while (0) |
1da177e4 LT |
242 | #define SBP2_INFO(fmt, args...) HPSB_INFO("sbp2: "fmt, ## args) |
243 | #define SBP2_NOTICE(fmt, args...) HPSB_NOTICE("sbp2: "fmt, ## args) | |
244 | #define SBP2_WARN(fmt, args...) HPSB_WARN("sbp2: "fmt, ## args) | |
245 | #endif | |
246 | ||
247 | #define SBP2_ERR(fmt, args...) HPSB_ERR("sbp2: "fmt, ## args) | |
d024ebc6 | 248 | #define SBP2_DEBUG_ENTER() SBP2_DEBUG("%s", __FUNCTION__) |
1da177e4 | 249 | |
1da177e4 LT |
250 | /* |
251 | * Globals | |
252 | */ | |
253 | ||
254 | static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id, | |
255 | u32 status); | |
256 | ||
257 | static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id, | |
258 | u32 scsi_status, struct scsi_cmnd *SCpnt, | |
259 | void (*done)(struct scsi_cmnd *)); | |
260 | ||
261 | static struct scsi_host_template scsi_driver_template; | |
262 | ||
263 | static const u8 sbp2_speedto_max_payload[] = { 0x7, 0x8, 0x9, 0xA, 0xB, 0xC }; | |
264 | ||
265 | static void sbp2_host_reset(struct hpsb_host *host); | |
266 | ||
267 | static int sbp2_probe(struct device *dev); | |
268 | static int sbp2_remove(struct device *dev); | |
269 | static int sbp2_update(struct unit_directory *ud); | |
270 | ||
271 | static struct hpsb_highlevel sbp2_highlevel = { | |
272 | .name = SBP2_DEVICE_NAME, | |
273 | .host_reset = sbp2_host_reset, | |
274 | }; | |
275 | ||
276 | static struct hpsb_address_ops sbp2_ops = { | |
277 | .write = sbp2_handle_status_write | |
278 | }; | |
279 | ||
280 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA | |
281 | static struct hpsb_address_ops sbp2_physdma_ops = { | |
a237f35f SR |
282 | .read = sbp2_handle_physdma_read, |
283 | .write = sbp2_handle_physdma_write, | |
1da177e4 LT |
284 | }; |
285 | #endif | |
286 | ||
287 | static struct hpsb_protocol_driver sbp2_driver = { | |
288 | .name = "SBP2 Driver", | |
289 | .id_table = sbp2_id_table, | |
290 | .update = sbp2_update, | |
291 | .driver = { | |
292 | .name = SBP2_DEVICE_NAME, | |
293 | .bus = &ieee1394_bus_type, | |
294 | .probe = sbp2_probe, | |
295 | .remove = sbp2_remove, | |
296 | }, | |
297 | }; | |
298 | ||
a80614d1 | 299 | /* |
24d3bf88 SR |
300 | * List of devices with known bugs. |
301 | * | |
302 | * The firmware_revision field, masked with 0xffff00, is the best indicator | |
303 | * for the type of bridge chip of a device. It yields a few false positives | |
304 | * but this did not break correctly behaving devices so far. | |
a80614d1 | 305 | */ |
24d3bf88 SR |
306 | static const struct { |
307 | u32 firmware_revision; | |
e9a1c52c | 308 | u32 model_id; |
24d3bf88 SR |
309 | unsigned workarounds; |
310 | } sbp2_workarounds_table[] = { | |
4b9a3347 | 311 | /* DViCO Momobay CX-1 with TSB42AA9 bridge */ { |
24d3bf88 | 312 | .firmware_revision = 0x002800, |
4b9a3347 | 313 | .model_id = 0x001010, |
24d3bf88 SR |
314 | .workarounds = SBP2_WORKAROUND_INQUIRY_36 | |
315 | SBP2_WORKAROUND_MODE_SENSE_8, | |
316 | }, | |
317 | /* Initio bridges, actually only needed for some older ones */ { | |
318 | .firmware_revision = 0x000200, | |
319 | .workarounds = SBP2_WORKAROUND_INQUIRY_36, | |
320 | }, | |
321 | /* Symbios bridge */ { | |
322 | .firmware_revision = 0xa0b800, | |
323 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, | |
e9a1c52c SR |
324 | }, |
325 | /* | |
326 | * Note about the following Apple iPod blacklist entries: | |
327 | * | |
328 | * There are iPods (2nd gen, 3rd gen) with model_id==0. Since our | |
329 | * matching logic treats 0 as a wildcard, we cannot match this ID | |
330 | * without rewriting the matching routine. Fortunately these iPods | |
331 | * do not feature the read_capacity bug according to one report. | |
332 | * Read_capacity behaviour as well as model_id could change due to | |
333 | * Apple-supplied firmware updates though. | |
334 | */ | |
335 | /* iPod 4th generation */ { | |
336 | .firmware_revision = 0x0a2700, | |
337 | .model_id = 0x000021, | |
338 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
339 | }, | |
340 | /* iPod mini */ { | |
341 | .firmware_revision = 0x0a2700, | |
342 | .model_id = 0x000023, | |
343 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
344 | }, | |
345 | /* iPod Photo */ { | |
346 | .firmware_revision = 0x0a2700, | |
347 | .model_id = 0x00007e, | |
348 | .workarounds = SBP2_WORKAROUND_FIX_CAPACITY, | |
24d3bf88 | 349 | } |
1da177e4 LT |
350 | }; |
351 | ||
1da177e4 LT |
352 | /************************************** |
353 | * General utility functions | |
354 | **************************************/ | |
355 | ||
1da177e4 LT |
356 | #ifndef __BIG_ENDIAN |
357 | /* | |
358 | * Converts a buffer from be32 to cpu byte ordering. Length is in bytes. | |
359 | */ | |
2b01b80b | 360 | static inline void sbp2util_be32_to_cpu_buffer(void *buffer, int length) |
1da177e4 LT |
361 | { |
362 | u32 *temp = buffer; | |
363 | ||
364 | for (length = (length >> 2); length--; ) | |
365 | temp[length] = be32_to_cpu(temp[length]); | |
366 | ||
367 | return; | |
368 | } | |
369 | ||
370 | /* | |
371 | * Converts a buffer from cpu to be32 byte ordering. Length is in bytes. | |
372 | */ | |
2b01b80b | 373 | static inline void sbp2util_cpu_to_be32_buffer(void *buffer, int length) |
1da177e4 LT |
374 | { |
375 | u32 *temp = buffer; | |
376 | ||
377 | for (length = (length >> 2); length--; ) | |
378 | temp[length] = cpu_to_be32(temp[length]); | |
379 | ||
380 | return; | |
381 | } | |
382 | #else /* BIG_ENDIAN */ | |
383 | /* Why waste the cpu cycles? */ | |
611aa19f SR |
384 | #define sbp2util_be32_to_cpu_buffer(x,y) do {} while (0) |
385 | #define sbp2util_cpu_to_be32_buffer(x,y) do {} while (0) | |
1da177e4 LT |
386 | #endif |
387 | ||
388 | #ifdef CONFIG_IEEE1394_SBP2_PACKET_DUMP | |
389 | /* | |
390 | * Debug packet dump routine. Length is in bytes. | |
391 | */ | |
a237f35f SR |
392 | static void sbp2util_packet_dump(void *buffer, int length, char *dump_name, |
393 | u32 dump_phys_addr) | |
1da177e4 LT |
394 | { |
395 | int i; | |
396 | unsigned char *dump = buffer; | |
397 | ||
398 | if (!dump || !length || !dump_name) | |
399 | return; | |
400 | ||
401 | if (dump_phys_addr) | |
402 | printk("[%s, 0x%x]", dump_name, dump_phys_addr); | |
403 | else | |
404 | printk("[%s]", dump_name); | |
405 | for (i = 0; i < length; i++) { | |
406 | if (i > 0x3f) { | |
407 | printk("\n ..."); | |
408 | break; | |
409 | } | |
410 | if ((i & 0x3) == 0) | |
411 | printk(" "); | |
412 | if ((i & 0xf) == 0) | |
413 | printk("\n "); | |
a237f35f | 414 | printk("%02x ", (int)dump[i]); |
1da177e4 LT |
415 | } |
416 | printk("\n"); | |
417 | ||
418 | return; | |
419 | } | |
420 | #else | |
611aa19f | 421 | #define sbp2util_packet_dump(w,x,y,z) do {} while (0) |
1da177e4 LT |
422 | #endif |
423 | ||
e8398bb7 SR |
424 | static DECLARE_WAIT_QUEUE_HEAD(access_wq); |
425 | ||
1da177e4 | 426 | /* |
e8398bb7 SR |
427 | * Waits for completion of an SBP-2 access request. |
428 | * Returns nonzero if timed out or prematurely interrupted. | |
1da177e4 | 429 | */ |
e8398bb7 SR |
430 | static int sbp2util_access_timeout(struct scsi_id_instance_data *scsi_id, |
431 | int timeout) | |
1da177e4 | 432 | { |
e8398bb7 SR |
433 | long leftover = wait_event_interruptible_timeout( |
434 | access_wq, scsi_id->access_complete, timeout); | |
1da177e4 | 435 | |
e8398bb7 SR |
436 | scsi_id->access_complete = 0; |
437 | return leftover <= 0; | |
1da177e4 LT |
438 | } |
439 | ||
e8398bb7 | 440 | /* Frees an allocated packet */ |
1da177e4 LT |
441 | static void sbp2_free_packet(struct hpsb_packet *packet) |
442 | { | |
443 | hpsb_free_tlabel(packet); | |
444 | hpsb_free_packet(packet); | |
445 | } | |
446 | ||
447 | /* This is much like hpsb_node_write(), except it ignores the response | |
448 | * subaction and returns immediately. Can be used from interrupts. | |
449 | */ | |
450 | static int sbp2util_node_write_no_wait(struct node_entry *ne, u64 addr, | |
a237f35f | 451 | quadlet_t *buffer, size_t length) |
1da177e4 LT |
452 | { |
453 | struct hpsb_packet *packet; | |
454 | ||
455 | packet = hpsb_make_writepacket(ne->host, ne->nodeid, | |
456 | addr, buffer, length); | |
a237f35f SR |
457 | if (!packet) |
458 | return -ENOMEM; | |
1da177e4 | 459 | |
a237f35f SR |
460 | hpsb_set_packet_complete_task(packet, |
461 | (void (*)(void *))sbp2_free_packet, | |
1da177e4 LT |
462 | packet); |
463 | ||
464 | hpsb_node_fill_packet(ne, packet); | |
465 | ||
a237f35f | 466 | if (hpsb_send_packet(packet) < 0) { |
1da177e4 LT |
467 | sbp2_free_packet(packet); |
468 | return -EIO; | |
469 | } | |
470 | ||
471 | return 0; | |
472 | } | |
473 | ||
09ee67ab SR |
474 | static void sbp2util_notify_fetch_agent(struct scsi_id_instance_data *scsi_id, |
475 | u64 offset, quadlet_t *data, size_t len) | |
476 | { | |
477 | /* | |
478 | * There is a small window after a bus reset within which the node | |
479 | * entry's generation is current but the reconnect wasn't completed. | |
480 | */ | |
2cccbb55 | 481 | if (unlikely(atomic_read(&scsi_id->state) == SBP2LU_STATE_IN_RESET)) |
09ee67ab SR |
482 | return; |
483 | ||
484 | if (hpsb_node_write(scsi_id->ne, | |
485 | scsi_id->sbp2_command_block_agent_addr + offset, | |
486 | data, len)) | |
487 | SBP2_ERR("sbp2util_notify_fetch_agent failed."); | |
488 | /* | |
489 | * Now accept new SCSI commands, unless a bus reset happended during | |
490 | * hpsb_node_write. | |
491 | */ | |
2cccbb55 | 492 | if (likely(atomic_read(&scsi_id->state) != SBP2LU_STATE_IN_RESET)) |
09ee67ab SR |
493 | scsi_unblock_requests(scsi_id->scsi_host); |
494 | } | |
495 | ||
c4028958 | 496 | static void sbp2util_write_orb_pointer(struct work_struct *work) |
09ee67ab | 497 | { |
c4028958 DH |
498 | struct scsi_id_instance_data *scsi_id = |
499 | container_of(work, struct scsi_id_instance_data, | |
500 | protocol_work.work); | |
09ee67ab SR |
501 | quadlet_t data[2]; |
502 | ||
c4028958 DH |
503 | data[0] = ORB_SET_NODE_ID(scsi_id->hi->host->node_id); |
504 | data[1] = scsi_id->last_orb_dma; | |
09ee67ab | 505 | sbp2util_cpu_to_be32_buffer(data, 8); |
c4028958 | 506 | sbp2util_notify_fetch_agent(scsi_id, SBP2_ORB_POINTER_OFFSET, data, 8); |
09ee67ab SR |
507 | } |
508 | ||
c4028958 | 509 | static void sbp2util_write_doorbell(struct work_struct *work) |
09ee67ab | 510 | { |
c4028958 DH |
511 | struct scsi_id_instance_data *scsi_id = |
512 | container_of(work, struct scsi_id_instance_data, | |
513 | protocol_work.work); | |
514 | sbp2util_notify_fetch_agent(scsi_id, SBP2_DOORBELL_OFFSET, NULL, 4); | |
09ee67ab SR |
515 | } |
516 | ||
1da177e4 LT |
517 | /* |
518 | * This function is called to create a pool of command orbs used for | |
519 | * command processing. It is called when a new sbp2 device is detected. | |
520 | */ | |
521 | static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data *scsi_id) | |
522 | { | |
523 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
524 | int i; | |
525 | unsigned long flags, orbs; | |
526 | struct sbp2_command_info *command; | |
527 | ||
528 | orbs = serialize_io ? 2 : SBP2_MAX_CMDS; | |
529 | ||
530 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
531 | for (i = 0; i < orbs; i++) { | |
8551158a | 532 | command = kzalloc(sizeof(*command), GFP_ATOMIC); |
1da177e4 | 533 | if (!command) { |
a237f35f SR |
534 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, |
535 | flags); | |
536 | return -ENOMEM; | |
1da177e4 | 537 | } |
1da177e4 | 538 | command->command_orb_dma = |
a237f35f SR |
539 | pci_map_single(hi->host->pdev, &command->command_orb, |
540 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 541 | PCI_DMA_TODEVICE); |
1da177e4 LT |
542 | SBP2_DMA_ALLOC("single command orb DMA"); |
543 | command->sge_dma = | |
a237f35f SR |
544 | pci_map_single(hi->host->pdev, |
545 | &command->scatter_gather_element, | |
546 | sizeof(command->scatter_gather_element), | |
547 | PCI_DMA_BIDIRECTIONAL); | |
1da177e4 LT |
548 | SBP2_DMA_ALLOC("scatter_gather_element"); |
549 | INIT_LIST_HEAD(&command->list); | |
550 | list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed); | |
551 | } | |
552 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
553 | return 0; | |
554 | } | |
555 | ||
556 | /* | |
557 | * This function is called to delete a pool of command orbs. | |
558 | */ | |
559 | static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data *scsi_id) | |
560 | { | |
561 | struct hpsb_host *host = scsi_id->hi->host; | |
562 | struct list_head *lh, *next; | |
563 | struct sbp2_command_info *command; | |
564 | unsigned long flags; | |
565 | ||
566 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
567 | if (!list_empty(&scsi_id->sbp2_command_orb_completed)) { | |
568 | list_for_each_safe(lh, next, &scsi_id->sbp2_command_orb_completed) { | |
569 | command = list_entry(lh, struct sbp2_command_info, list); | |
570 | ||
571 | /* Release our generic DMA's */ | |
572 | pci_unmap_single(host->pdev, command->command_orb_dma, | |
573 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 574 | PCI_DMA_TODEVICE); |
1da177e4 LT |
575 | SBP2_DMA_FREE("single command orb DMA"); |
576 | pci_unmap_single(host->pdev, command->sge_dma, | |
577 | sizeof(command->scatter_gather_element), | |
578 | PCI_DMA_BIDIRECTIONAL); | |
579 | SBP2_DMA_FREE("scatter_gather_element"); | |
580 | ||
581 | kfree(command); | |
582 | } | |
583 | } | |
584 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
585 | return; | |
586 | } | |
587 | ||
588 | /* | |
589 | * This function finds the sbp2_command for a given outstanding command | |
590 | * orb.Only looks at the inuse list. | |
591 | */ | |
592 | static struct sbp2_command_info *sbp2util_find_command_for_orb( | |
593 | struct scsi_id_instance_data *scsi_id, dma_addr_t orb) | |
594 | { | |
595 | struct sbp2_command_info *command; | |
596 | unsigned long flags; | |
597 | ||
598 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
599 | if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) { | |
600 | list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) { | |
601 | if (command->command_orb_dma == orb) { | |
602 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
a237f35f | 603 | return command; |
1da177e4 LT |
604 | } |
605 | } | |
606 | } | |
607 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
608 | ||
609 | SBP2_ORB_DEBUG("could not match command orb %x", (unsigned int)orb); | |
610 | ||
a237f35f | 611 | return NULL; |
1da177e4 LT |
612 | } |
613 | ||
614 | /* | |
615 | * This function finds the sbp2_command for a given outstanding SCpnt. | |
616 | * Only looks at the inuse list. | |
24c7cd06 | 617 | * Must be called with scsi_id->sbp2_command_orb_lock held. |
1da177e4 | 618 | */ |
24c7cd06 SR |
619 | static struct sbp2_command_info *sbp2util_find_command_for_SCpnt( |
620 | struct scsi_id_instance_data *scsi_id, void *SCpnt) | |
1da177e4 LT |
621 | { |
622 | struct sbp2_command_info *command; | |
1da177e4 | 623 | |
24c7cd06 SR |
624 | if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) |
625 | list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) | |
626 | if (command->Current_SCpnt == SCpnt) | |
a237f35f | 627 | return command; |
a237f35f | 628 | return NULL; |
1da177e4 LT |
629 | } |
630 | ||
631 | /* | |
632 | * This function allocates a command orb used to send a scsi command. | |
633 | */ | |
634 | static struct sbp2_command_info *sbp2util_allocate_command_orb( | |
635 | struct scsi_id_instance_data *scsi_id, | |
636 | struct scsi_cmnd *Current_SCpnt, | |
637 | void (*Current_done)(struct scsi_cmnd *)) | |
638 | { | |
639 | struct list_head *lh; | |
640 | struct sbp2_command_info *command = NULL; | |
641 | unsigned long flags; | |
642 | ||
643 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
644 | if (!list_empty(&scsi_id->sbp2_command_orb_completed)) { | |
645 | lh = scsi_id->sbp2_command_orb_completed.next; | |
646 | list_del(lh); | |
647 | command = list_entry(lh, struct sbp2_command_info, list); | |
648 | command->Current_done = Current_done; | |
649 | command->Current_SCpnt = Current_SCpnt; | |
650 | list_add_tail(&command->list, &scsi_id->sbp2_command_orb_inuse); | |
651 | } else { | |
d024ebc6 | 652 | SBP2_ERR("%s: no orbs available", __FUNCTION__); |
1da177e4 LT |
653 | } |
654 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
a237f35f | 655 | return command; |
1da177e4 LT |
656 | } |
657 | ||
658 | /* Free our DMA's */ | |
659 | static void sbp2util_free_command_dma(struct sbp2_command_info *command) | |
660 | { | |
661 | struct scsi_id_instance_data *scsi_id = | |
662 | (struct scsi_id_instance_data *)command->Current_SCpnt->device->host->hostdata[0]; | |
663 | struct hpsb_host *host; | |
664 | ||
665 | if (!scsi_id) { | |
d024ebc6 | 666 | SBP2_ERR("%s: scsi_id == NULL", __FUNCTION__); |
1da177e4 LT |
667 | return; |
668 | } | |
669 | ||
670 | host = scsi_id->ud->ne->host; | |
671 | ||
672 | if (command->cmd_dma) { | |
673 | if (command->dma_type == CMD_DMA_SINGLE) { | |
674 | pci_unmap_single(host->pdev, command->cmd_dma, | |
675 | command->dma_size, command->dma_dir); | |
676 | SBP2_DMA_FREE("single bulk"); | |
677 | } else if (command->dma_type == CMD_DMA_PAGE) { | |
678 | pci_unmap_page(host->pdev, command->cmd_dma, | |
679 | command->dma_size, command->dma_dir); | |
680 | SBP2_DMA_FREE("single page"); | |
681 | } /* XXX: Check for CMD_DMA_NONE bug */ | |
682 | command->dma_type = CMD_DMA_NONE; | |
683 | command->cmd_dma = 0; | |
684 | } | |
685 | ||
686 | if (command->sge_buffer) { | |
687 | pci_unmap_sg(host->pdev, command->sge_buffer, | |
688 | command->dma_size, command->dma_dir); | |
689 | SBP2_DMA_FREE("scatter list"); | |
690 | command->sge_buffer = NULL; | |
691 | } | |
692 | } | |
693 | ||
694 | /* | |
695 | * This function moves a command to the completed orb list. | |
24c7cd06 | 696 | * Must be called with scsi_id->sbp2_command_orb_lock held. |
1da177e4 | 697 | */ |
24c7cd06 SR |
698 | static void sbp2util_mark_command_completed( |
699 | struct scsi_id_instance_data *scsi_id, | |
700 | struct sbp2_command_info *command) | |
1da177e4 | 701 | { |
1da177e4 LT |
702 | list_del(&command->list); |
703 | sbp2util_free_command_dma(command); | |
704 | list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed); | |
1da177e4 LT |
705 | } |
706 | ||
abd559b1 JM |
707 | /* |
708 | * Is scsi_id valid? Is the 1394 node still present? | |
709 | */ | |
710 | static inline int sbp2util_node_is_available(struct scsi_id_instance_data *scsi_id) | |
711 | { | |
712 | return scsi_id && scsi_id->ne && !scsi_id->ne->in_limbo; | |
713 | } | |
714 | ||
1da177e4 LT |
715 | /********************************************* |
716 | * IEEE-1394 core driver stack related section | |
717 | *********************************************/ | |
718 | static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud); | |
719 | ||
720 | static int sbp2_probe(struct device *dev) | |
721 | { | |
722 | struct unit_directory *ud; | |
723 | struct scsi_id_instance_data *scsi_id; | |
724 | ||
d024ebc6 | 725 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
726 | |
727 | ud = container_of(dev, struct unit_directory, device); | |
728 | ||
729 | /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s) | |
730 | * instead. */ | |
731 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY) | |
732 | return -ENODEV; | |
733 | ||
a237f35f | 734 | scsi_id = sbp2_alloc_device(ud); |
1da177e4 | 735 | |
a237f35f SR |
736 | if (!scsi_id) |
737 | return -ENOMEM; | |
1da177e4 | 738 | |
a237f35f | 739 | sbp2_parse_unit_directory(scsi_id, ud); |
1da177e4 | 740 | |
a237f35f | 741 | return sbp2_start_device(scsi_id); |
1da177e4 LT |
742 | } |
743 | ||
744 | static int sbp2_remove(struct device *dev) | |
745 | { | |
746 | struct unit_directory *ud; | |
747 | struct scsi_id_instance_data *scsi_id; | |
abd559b1 | 748 | struct scsi_device *sdev; |
1da177e4 | 749 | |
d024ebc6 | 750 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
751 | |
752 | ud = container_of(dev, struct unit_directory, device); | |
753 | scsi_id = ud->device.driver_data; | |
abd559b1 JM |
754 | if (!scsi_id) |
755 | return 0; | |
756 | ||
bf637ec3 SR |
757 | if (scsi_id->scsi_host) { |
758 | /* Get rid of enqueued commands if there is no chance to | |
759 | * send them. */ | |
760 | if (!sbp2util_node_is_available(scsi_id)) | |
761 | sbp2scsi_complete_all_commands(scsi_id, DID_NO_CONNECT); | |
762 | /* scsi_remove_device() will trigger shutdown functions of SCSI | |
763 | * highlevel drivers which would deadlock if blocked. */ | |
2cccbb55 | 764 | atomic_set(&scsi_id->state, SBP2LU_STATE_IN_SHUTDOWN); |
abd559b1 | 765 | scsi_unblock_requests(scsi_id->scsi_host); |
bf637ec3 | 766 | } |
abd559b1 JM |
767 | sdev = scsi_id->sdev; |
768 | if (sdev) { | |
769 | scsi_id->sdev = NULL; | |
770 | scsi_remove_device(sdev); | |
771 | } | |
1da177e4 LT |
772 | |
773 | sbp2_logout_device(scsi_id); | |
774 | sbp2_remove_device(scsi_id); | |
775 | ||
776 | return 0; | |
777 | } | |
778 | ||
779 | static int sbp2_update(struct unit_directory *ud) | |
780 | { | |
781 | struct scsi_id_instance_data *scsi_id = ud->device.driver_data; | |
782 | ||
d024ebc6 | 783 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
784 | |
785 | if (sbp2_reconnect_device(scsi_id)) { | |
786 | ||
787 | /* | |
788 | * Ok, reconnect has failed. Perhaps we didn't | |
789 | * reconnect fast enough. Try doing a regular login, but | |
790 | * first do a logout just in case of any weirdness. | |
791 | */ | |
792 | sbp2_logout_device(scsi_id); | |
793 | ||
794 | if (sbp2_login_device(scsi_id)) { | |
795 | /* Login failed too, just fail, and the backend | |
796 | * will call our sbp2_remove for us */ | |
797 | SBP2_ERR("Failed to reconnect to sbp2 device!"); | |
798 | return -EBUSY; | |
799 | } | |
800 | } | |
801 | ||
802 | /* Set max retries to something large on the device. */ | |
803 | sbp2_set_busy_timeout(scsi_id); | |
804 | ||
805 | /* Do a SBP-2 fetch agent reset. */ | |
806 | sbp2_agent_reset(scsi_id, 1); | |
807 | ||
808 | /* Get the max speed and packet size that we can use. */ | |
809 | sbp2_max_speed_and_size(scsi_id); | |
810 | ||
811 | /* Complete any pending commands with busy (so they get | |
812 | * retried) and remove them from our queue | |
813 | */ | |
814 | sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY); | |
815 | ||
4fc383c0 SR |
816 | /* Accept new commands unless there was another bus reset in the |
817 | * meantime. */ | |
818 | if (hpsb_node_entry_valid(scsi_id->ne)) { | |
2cccbb55 | 819 | atomic_set(&scsi_id->state, SBP2LU_STATE_RUNNING); |
4fc383c0 SR |
820 | scsi_unblock_requests(scsi_id->scsi_host); |
821 | } | |
1da177e4 LT |
822 | return 0; |
823 | } | |
824 | ||
825 | /* This functions is called by the sbp2_probe, for each new device. We now | |
826 | * allocate one scsi host for each scsi_id (unit directory). */ | |
827 | static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud) | |
828 | { | |
829 | struct sbp2scsi_host_info *hi; | |
830 | struct Scsi_Host *scsi_host = NULL; | |
831 | struct scsi_id_instance_data *scsi_id = NULL; | |
832 | ||
d024ebc6 | 833 | SBP2_DEBUG_ENTER(); |
1da177e4 | 834 | |
8551158a | 835 | scsi_id = kzalloc(sizeof(*scsi_id), GFP_KERNEL); |
1da177e4 LT |
836 | if (!scsi_id) { |
837 | SBP2_ERR("failed to create scsi_id"); | |
838 | goto failed_alloc; | |
839 | } | |
1da177e4 LT |
840 | |
841 | scsi_id->ne = ud->ne; | |
842 | scsi_id->ud = ud; | |
843 | scsi_id->speed_code = IEEE1394_SPEED_100; | |
844 | scsi_id->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100]; | |
6737231e | 845 | scsi_id->status_fifo_addr = CSR1212_INVALID_ADDR_SPACE; |
1da177e4 LT |
846 | INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_inuse); |
847 | INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_completed); | |
848 | INIT_LIST_HEAD(&scsi_id->scsi_list); | |
849 | spin_lock_init(&scsi_id->sbp2_command_orb_lock); | |
2cccbb55 | 850 | atomic_set(&scsi_id->state, SBP2LU_STATE_RUNNING); |
c4028958 | 851 | INIT_DELAYED_WORK(&scsi_id->protocol_work, NULL); |
1da177e4 LT |
852 | |
853 | ud->device.driver_data = scsi_id; | |
854 | ||
855 | hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host); | |
856 | if (!hi) { | |
857 | hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host, sizeof(*hi)); | |
858 | if (!hi) { | |
859 | SBP2_ERR("failed to allocate hostinfo"); | |
860 | goto failed_alloc; | |
861 | } | |
862 | SBP2_DEBUG("sbp2_alloc_device: allocated hostinfo"); | |
863 | hi->host = ud->ne->host; | |
864 | INIT_LIST_HEAD(&hi->scsi_ids); | |
865 | ||
1da177e4 LT |
866 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA |
867 | /* Handle data movement if physical dma is not | |
55664051 SR |
868 | * enabled or not supported on host controller */ |
869 | if (!hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, | |
870 | &sbp2_physdma_ops, | |
871 | 0x0ULL, 0xfffffffcULL)) { | |
872 | SBP2_ERR("failed to register lower 4GB address range"); | |
873 | goto failed_alloc; | |
874 | } | |
1da177e4 LT |
875 | #endif |
876 | } | |
877 | ||
147830f2 SR |
878 | /* Prevent unloading of the 1394 host */ |
879 | if (!try_module_get(hi->host->driver->owner)) { | |
880 | SBP2_ERR("failed to get a reference on 1394 host driver"); | |
881 | goto failed_alloc; | |
882 | } | |
883 | ||
1da177e4 LT |
884 | scsi_id->hi = hi; |
885 | ||
886 | list_add_tail(&scsi_id->scsi_list, &hi->scsi_ids); | |
887 | ||
35bdddb8 SR |
888 | /* Register the status FIFO address range. We could use the same FIFO |
889 | * for targets at different nodes. However we need different FIFOs per | |
a54c9d30 SR |
890 | * target in order to support multi-unit devices. |
891 | * The FIFO is located out of the local host controller's physical range | |
892 | * but, if possible, within the posted write area. Status writes will | |
893 | * then be performed as unified transactions. This slightly reduces | |
894 | * bandwidth usage, and some Prolific based devices seem to require it. | |
895 | */ | |
35bdddb8 SR |
896 | scsi_id->status_fifo_addr = hpsb_allocate_and_register_addrspace( |
897 | &sbp2_highlevel, ud->ne->host, &sbp2_ops, | |
898 | sizeof(struct sbp2_status_block), sizeof(quadlet_t), | |
40ae6c5e | 899 | ud->ne->host->low_addr_space, CSR1212_ALL_SPACE_END); |
6737231e | 900 | if (scsi_id->status_fifo_addr == CSR1212_INVALID_ADDR_SPACE) { |
35bdddb8 SR |
901 | SBP2_ERR("failed to allocate status FIFO address range"); |
902 | goto failed_alloc; | |
903 | } | |
904 | ||
1da177e4 | 905 | /* Register our host with the SCSI stack. */ |
a2ef79e1 | 906 | scsi_host = scsi_host_alloc(&scsi_driver_template, |
a237f35f | 907 | sizeof(unsigned long)); |
1da177e4 LT |
908 | if (!scsi_host) { |
909 | SBP2_ERR("failed to register scsi host"); | |
910 | goto failed_alloc; | |
911 | } | |
912 | ||
913 | scsi_host->hostdata[0] = (unsigned long)scsi_id; | |
914 | ||
915 | if (!scsi_add_host(scsi_host, &ud->device)) { | |
916 | scsi_id->scsi_host = scsi_host; | |
917 | return scsi_id; | |
918 | } | |
919 | ||
920 | SBP2_ERR("failed to add scsi host"); | |
921 | scsi_host_put(scsi_host); | |
922 | ||
923 | failed_alloc: | |
924 | sbp2_remove_device(scsi_id); | |
925 | return NULL; | |
926 | } | |
927 | ||
1da177e4 LT |
928 | static void sbp2_host_reset(struct hpsb_host *host) |
929 | { | |
930 | struct sbp2scsi_host_info *hi; | |
931 | struct scsi_id_instance_data *scsi_id; | |
932 | ||
933 | hi = hpsb_get_hostinfo(&sbp2_highlevel, host); | |
2cccbb55 SR |
934 | if (!hi) |
935 | return; | |
936 | list_for_each_entry(scsi_id, &hi->scsi_ids, scsi_list) | |
937 | if (likely(atomic_read(&scsi_id->state) != | |
938 | SBP2LU_STATE_IN_SHUTDOWN)) { | |
939 | atomic_set(&scsi_id->state, SBP2LU_STATE_IN_RESET); | |
1da177e4 | 940 | scsi_block_requests(scsi_id->scsi_host); |
09ee67ab | 941 | } |
1da177e4 LT |
942 | } |
943 | ||
1da177e4 LT |
944 | /* |
945 | * This function is where we first pull the node unique ids, and then | |
946 | * allocate memory and register a SBP-2 device. | |
947 | */ | |
948 | static int sbp2_start_device(struct scsi_id_instance_data *scsi_id) | |
949 | { | |
950 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
146f7262 | 951 | int error; |
1da177e4 | 952 | |
d024ebc6 | 953 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
954 | |
955 | /* Login FIFO DMA */ | |
956 | scsi_id->login_response = | |
a237f35f SR |
957 | pci_alloc_consistent(hi->host->pdev, |
958 | sizeof(struct sbp2_login_response), | |
1da177e4 LT |
959 | &scsi_id->login_response_dma); |
960 | if (!scsi_id->login_response) | |
961 | goto alloc_fail; | |
962 | SBP2_DMA_ALLOC("consistent DMA region for login FIFO"); | |
963 | ||
964 | /* Query logins ORB DMA */ | |
965 | scsi_id->query_logins_orb = | |
a237f35f SR |
966 | pci_alloc_consistent(hi->host->pdev, |
967 | sizeof(struct sbp2_query_logins_orb), | |
1da177e4 LT |
968 | &scsi_id->query_logins_orb_dma); |
969 | if (!scsi_id->query_logins_orb) | |
970 | goto alloc_fail; | |
971 | SBP2_DMA_ALLOC("consistent DMA region for query logins ORB"); | |
972 | ||
973 | /* Query logins response DMA */ | |
974 | scsi_id->query_logins_response = | |
a237f35f SR |
975 | pci_alloc_consistent(hi->host->pdev, |
976 | sizeof(struct sbp2_query_logins_response), | |
1da177e4 LT |
977 | &scsi_id->query_logins_response_dma); |
978 | if (!scsi_id->query_logins_response) | |
979 | goto alloc_fail; | |
980 | SBP2_DMA_ALLOC("consistent DMA region for query logins response"); | |
981 | ||
982 | /* Reconnect ORB DMA */ | |
983 | scsi_id->reconnect_orb = | |
a237f35f SR |
984 | pci_alloc_consistent(hi->host->pdev, |
985 | sizeof(struct sbp2_reconnect_orb), | |
1da177e4 LT |
986 | &scsi_id->reconnect_orb_dma); |
987 | if (!scsi_id->reconnect_orb) | |
988 | goto alloc_fail; | |
989 | SBP2_DMA_ALLOC("consistent DMA region for reconnect ORB"); | |
990 | ||
991 | /* Logout ORB DMA */ | |
992 | scsi_id->logout_orb = | |
a237f35f SR |
993 | pci_alloc_consistent(hi->host->pdev, |
994 | sizeof(struct sbp2_logout_orb), | |
1da177e4 LT |
995 | &scsi_id->logout_orb_dma); |
996 | if (!scsi_id->logout_orb) | |
997 | goto alloc_fail; | |
998 | SBP2_DMA_ALLOC("consistent DMA region for logout ORB"); | |
999 | ||
1000 | /* Login ORB DMA */ | |
1001 | scsi_id->login_orb = | |
a237f35f SR |
1002 | pci_alloc_consistent(hi->host->pdev, |
1003 | sizeof(struct sbp2_login_orb), | |
1da177e4 | 1004 | &scsi_id->login_orb_dma); |
eaceec7f SR |
1005 | if (!scsi_id->login_orb) |
1006 | goto alloc_fail; | |
1da177e4 LT |
1007 | SBP2_DMA_ALLOC("consistent DMA region for login ORB"); |
1008 | ||
1009 | SBP2_DEBUG("New SBP-2 device inserted, SCSI ID = %x", scsi_id->ud->id); | |
1010 | ||
1011 | /* | |
1012 | * Create our command orb pool | |
1013 | */ | |
1014 | if (sbp2util_create_command_orb_pool(scsi_id)) { | |
1015 | SBP2_ERR("sbp2util_create_command_orb_pool failed!"); | |
1016 | sbp2_remove_device(scsi_id); | |
1017 | return -ENOMEM; | |
1018 | } | |
1019 | ||
1020 | /* Schedule a timeout here. The reason is that we may be so close | |
1021 | * to a bus reset, that the device is not available for logins. | |
1022 | * This can happen when the bus reset is caused by the host | |
1023 | * connected to the sbp2 device being removed. That host would | |
1024 | * have a certain amount of time to relogin before the sbp2 device | |
1025 | * allows someone else to login instead. One second makes sense. */ | |
902abed1 | 1026 | if (msleep_interruptible(1000)) { |
1da177e4 LT |
1027 | sbp2_remove_device(scsi_id); |
1028 | return -EINTR; | |
1029 | } | |
a237f35f | 1030 | |
1da177e4 LT |
1031 | /* |
1032 | * Login to the sbp-2 device | |
1033 | */ | |
1034 | if (sbp2_login_device(scsi_id)) { | |
1035 | /* Login failed, just remove the device. */ | |
1036 | sbp2_remove_device(scsi_id); | |
1037 | return -EBUSY; | |
1038 | } | |
1039 | ||
1040 | /* | |
1041 | * Set max retries to something large on the device | |
1042 | */ | |
1043 | sbp2_set_busy_timeout(scsi_id); | |
1044 | ||
1045 | /* | |
1046 | * Do a SBP-2 fetch agent reset | |
1047 | */ | |
1048 | sbp2_agent_reset(scsi_id, 1); | |
1049 | ||
1050 | /* | |
1051 | * Get the max speed and packet size that we can use | |
1052 | */ | |
1053 | sbp2_max_speed_and_size(scsi_id); | |
1054 | ||
1055 | /* Add this device to the scsi layer now */ | |
146f7262 JB |
1056 | error = scsi_add_device(scsi_id->scsi_host, 0, scsi_id->ud->id, 0); |
1057 | if (error) { | |
1da177e4 | 1058 | SBP2_ERR("scsi_add_device failed"); |
dc3edd54 SR |
1059 | sbp2_logout_device(scsi_id); |
1060 | sbp2_remove_device(scsi_id); | |
146f7262 | 1061 | return error; |
1da177e4 LT |
1062 | } |
1063 | ||
1064 | return 0; | |
eaceec7f SR |
1065 | |
1066 | alloc_fail: | |
1067 | SBP2_ERR("Could not allocate memory for scsi_id"); | |
1068 | sbp2_remove_device(scsi_id); | |
1069 | return -ENOMEM; | |
1da177e4 LT |
1070 | } |
1071 | ||
1072 | /* | |
1073 | * This function removes an sbp2 device from the sbp2scsi_host_info struct. | |
1074 | */ | |
1075 | static void sbp2_remove_device(struct scsi_id_instance_data *scsi_id) | |
1076 | { | |
1077 | struct sbp2scsi_host_info *hi; | |
1078 | ||
d024ebc6 | 1079 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
1080 | |
1081 | if (!scsi_id) | |
1082 | return; | |
1083 | ||
1084 | hi = scsi_id->hi; | |
1085 | ||
1086 | /* This will remove our scsi device aswell */ | |
1087 | if (scsi_id->scsi_host) { | |
1088 | scsi_remove_host(scsi_id->scsi_host); | |
1089 | scsi_host_put(scsi_id->scsi_host); | |
1090 | } | |
09ee67ab | 1091 | flush_scheduled_work(); |
1da177e4 LT |
1092 | sbp2util_remove_command_orb_pool(scsi_id); |
1093 | ||
1094 | list_del(&scsi_id->scsi_list); | |
1095 | ||
1096 | if (scsi_id->login_response) { | |
1097 | pci_free_consistent(hi->host->pdev, | |
1098 | sizeof(struct sbp2_login_response), | |
1099 | scsi_id->login_response, | |
1100 | scsi_id->login_response_dma); | |
1101 | SBP2_DMA_FREE("single login FIFO"); | |
1102 | } | |
1103 | ||
1104 | if (scsi_id->login_orb) { | |
1105 | pci_free_consistent(hi->host->pdev, | |
1106 | sizeof(struct sbp2_login_orb), | |
1107 | scsi_id->login_orb, | |
1108 | scsi_id->login_orb_dma); | |
1109 | SBP2_DMA_FREE("single login ORB"); | |
1110 | } | |
1111 | ||
1112 | if (scsi_id->reconnect_orb) { | |
1113 | pci_free_consistent(hi->host->pdev, | |
1114 | sizeof(struct sbp2_reconnect_orb), | |
1115 | scsi_id->reconnect_orb, | |
1116 | scsi_id->reconnect_orb_dma); | |
1117 | SBP2_DMA_FREE("single reconnect orb"); | |
1118 | } | |
1119 | ||
1120 | if (scsi_id->logout_orb) { | |
1121 | pci_free_consistent(hi->host->pdev, | |
1122 | sizeof(struct sbp2_logout_orb), | |
1123 | scsi_id->logout_orb, | |
1124 | scsi_id->logout_orb_dma); | |
1125 | SBP2_DMA_FREE("single logout orb"); | |
1126 | } | |
1127 | ||
1128 | if (scsi_id->query_logins_orb) { | |
1129 | pci_free_consistent(hi->host->pdev, | |
1130 | sizeof(struct sbp2_query_logins_orb), | |
1131 | scsi_id->query_logins_orb, | |
1132 | scsi_id->query_logins_orb_dma); | |
1133 | SBP2_DMA_FREE("single query logins orb"); | |
1134 | } | |
1135 | ||
1136 | if (scsi_id->query_logins_response) { | |
1137 | pci_free_consistent(hi->host->pdev, | |
1138 | sizeof(struct sbp2_query_logins_response), | |
1139 | scsi_id->query_logins_response, | |
1140 | scsi_id->query_logins_response_dma); | |
1141 | SBP2_DMA_FREE("single query logins data"); | |
1142 | } | |
1143 | ||
6737231e | 1144 | if (scsi_id->status_fifo_addr != CSR1212_INVALID_ADDR_SPACE) |
35bdddb8 | 1145 | hpsb_unregister_addrspace(&sbp2_highlevel, hi->host, |
6737231e | 1146 | scsi_id->status_fifo_addr); |
35bdddb8 | 1147 | |
1da177e4 LT |
1148 | scsi_id->ud->device.driver_data = NULL; |
1149 | ||
147830f2 SR |
1150 | if (hi) |
1151 | module_put(hi->host->driver->owner); | |
1152 | ||
1da177e4 LT |
1153 | SBP2_DEBUG("SBP-2 device removed, SCSI ID = %d", scsi_id->ud->id); |
1154 | ||
1155 | kfree(scsi_id); | |
1156 | } | |
1157 | ||
1158 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA | |
1159 | /* | |
1160 | * This function deals with physical dma write requests (for adapters that do not support | |
1161 | * physical dma in hardware). Mostly just here for debugging... | |
1162 | */ | |
a237f35f SR |
1163 | static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid, |
1164 | int destid, quadlet_t *data, u64 addr, | |
1165 | size_t length, u16 flags) | |
1da177e4 LT |
1166 | { |
1167 | ||
a237f35f SR |
1168 | /* |
1169 | * Manually put the data in the right place. | |
1170 | */ | |
1171 | memcpy(bus_to_virt((u32) addr), data, length); | |
1172 | sbp2util_packet_dump(data, length, "sbp2 phys dma write by device", | |
1173 | (u32) addr); | |
1174 | return RCODE_COMPLETE; | |
1da177e4 LT |
1175 | } |
1176 | ||
1177 | /* | |
1178 | * This function deals with physical dma read requests (for adapters that do not support | |
1179 | * physical dma in hardware). Mostly just here for debugging... | |
1180 | */ | |
a237f35f SR |
1181 | static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid, |
1182 | quadlet_t *data, u64 addr, size_t length, | |
1183 | u16 flags) | |
1da177e4 LT |
1184 | { |
1185 | ||
a237f35f SR |
1186 | /* |
1187 | * Grab data from memory and send a read response. | |
1188 | */ | |
1189 | memcpy(data, bus_to_virt((u32) addr), length); | |
1190 | sbp2util_packet_dump(data, length, "sbp2 phys dma read by device", | |
1191 | (u32) addr); | |
1192 | return RCODE_COMPLETE; | |
1da177e4 LT |
1193 | } |
1194 | #endif | |
1195 | ||
1da177e4 LT |
1196 | /************************************** |
1197 | * SBP-2 protocol related section | |
1198 | **************************************/ | |
1199 | ||
1da177e4 LT |
1200 | /* |
1201 | * This function queries the device for the maximum concurrent logins it | |
1202 | * supports. | |
1203 | */ | |
1204 | static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id) | |
1205 | { | |
1206 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1207 | quadlet_t data[2]; | |
1208 | int max_logins; | |
1209 | int active_logins; | |
1210 | ||
d024ebc6 | 1211 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
1212 | |
1213 | scsi_id->query_logins_orb->reserved1 = 0x0; | |
1214 | scsi_id->query_logins_orb->reserved2 = 0x0; | |
1215 | ||
1216 | scsi_id->query_logins_orb->query_response_lo = scsi_id->query_logins_response_dma; | |
1217 | scsi_id->query_logins_orb->query_response_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1da177e4 LT |
1218 | |
1219 | scsi_id->query_logins_orb->lun_misc = ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST); | |
1220 | scsi_id->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1); | |
e309fc6d | 1221 | scsi_id->query_logins_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_lun); |
1da177e4 LT |
1222 | |
1223 | scsi_id->query_logins_orb->reserved_resp_length = | |
1224 | ORB_SET_QUERY_LOGINS_RESP_LENGTH(sizeof(struct sbp2_query_logins_response)); | |
1da177e4 | 1225 | |
35bdddb8 SR |
1226 | scsi_id->query_logins_orb->status_fifo_hi = |
1227 | ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id); | |
1228 | scsi_id->query_logins_orb->status_fifo_lo = | |
1229 | ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr); | |
1da177e4 LT |
1230 | |
1231 | sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb)); | |
1232 | ||
1da177e4 LT |
1233 | sbp2util_packet_dump(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb), |
1234 | "sbp2 query logins orb", scsi_id->query_logins_orb_dma); | |
1235 | ||
1236 | memset(scsi_id->query_logins_response, 0, sizeof(struct sbp2_query_logins_response)); | |
1da177e4 | 1237 | |
1da177e4 LT |
1238 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
1239 | data[1] = scsi_id->query_logins_orb_dma; | |
1240 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1241 | ||
1da177e4 | 1242 | hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8); |
1da177e4 | 1243 | |
e8398bb7 | 1244 | if (sbp2util_access_timeout(scsi_id, 2*HZ)) { |
1da177e4 | 1245 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); |
a237f35f | 1246 | return -EIO; |
1da177e4 LT |
1247 | } |
1248 | ||
1249 | if (scsi_id->status_block.ORB_offset_lo != scsi_id->query_logins_orb_dma) { | |
1250 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); | |
a237f35f | 1251 | return -EIO; |
1da177e4 LT |
1252 | } |
1253 | ||
6065772d SR |
1254 | if (STATUS_TEST_RDS(scsi_id->status_block.ORB_offset_hi_misc)) { |
1255 | SBP2_INFO("Error querying logins to SBP-2 device - failed"); | |
a237f35f | 1256 | return -EIO; |
1da177e4 LT |
1257 | } |
1258 | ||
1259 | sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_response, sizeof(struct sbp2_query_logins_response)); | |
1260 | ||
1261 | SBP2_DEBUG("length_max_logins = %x", | |
1262 | (unsigned int)scsi_id->query_logins_response->length_max_logins); | |
1263 | ||
1da177e4 | 1264 | max_logins = RESPONSE_GET_MAX_LOGINS(scsi_id->query_logins_response->length_max_logins); |
20f45781 | 1265 | SBP2_INFO("Maximum concurrent logins supported: %d", max_logins); |
1da177e4 LT |
1266 | |
1267 | active_logins = RESPONSE_GET_ACTIVE_LOGINS(scsi_id->query_logins_response->length_max_logins); | |
20f45781 | 1268 | SBP2_INFO("Number of active logins: %d", active_logins); |
1da177e4 LT |
1269 | |
1270 | if (active_logins >= max_logins) { | |
a237f35f | 1271 | return -EIO; |
1da177e4 LT |
1272 | } |
1273 | ||
1274 | return 0; | |
1275 | } | |
1276 | ||
1277 | /* | |
1278 | * This function is called in order to login to a particular SBP-2 device, | |
1279 | * after a bus reset. | |
1280 | */ | |
1281 | static int sbp2_login_device(struct scsi_id_instance_data *scsi_id) | |
1282 | { | |
1283 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1284 | quadlet_t data[2]; | |
1285 | ||
d024ebc6 | 1286 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
1287 | |
1288 | if (!scsi_id->login_orb) { | |
d024ebc6 | 1289 | SBP2_DEBUG("%s: login_orb not alloc'd!", __FUNCTION__); |
a237f35f | 1290 | return -EIO; |
1da177e4 LT |
1291 | } |
1292 | ||
1293 | if (!exclusive_login) { | |
1294 | if (sbp2_query_logins(scsi_id)) { | |
1295 | SBP2_INFO("Device does not support any more concurrent logins"); | |
a237f35f | 1296 | return -EIO; |
1da177e4 LT |
1297 | } |
1298 | } | |
1299 | ||
1300 | /* Set-up login ORB, assume no password */ | |
1301 | scsi_id->login_orb->password_hi = 0; | |
1302 | scsi_id->login_orb->password_lo = 0; | |
1da177e4 LT |
1303 | |
1304 | scsi_id->login_orb->login_response_lo = scsi_id->login_response_dma; | |
1305 | scsi_id->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1da177e4 LT |
1306 | |
1307 | scsi_id->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST); | |
1308 | scsi_id->login_orb->lun_misc |= ORB_SET_RECONNECT(0); /* One second reconnect time */ | |
1309 | scsi_id->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(exclusive_login); /* Exclusive access to device */ | |
1310 | scsi_id->login_orb->lun_misc |= ORB_SET_NOTIFY(1); /* Notify us of login complete */ | |
e309fc6d | 1311 | scsi_id->login_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_lun); |
1da177e4 LT |
1312 | |
1313 | scsi_id->login_orb->passwd_resp_lengths = | |
1314 | ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response)); | |
1da177e4 | 1315 | |
35bdddb8 SR |
1316 | scsi_id->login_orb->status_fifo_hi = |
1317 | ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id); | |
1318 | scsi_id->login_orb->status_fifo_lo = | |
1319 | ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr); | |
1da177e4 | 1320 | |
1da177e4 LT |
1321 | sbp2util_cpu_to_be32_buffer(scsi_id->login_orb, sizeof(struct sbp2_login_orb)); |
1322 | ||
1da177e4 LT |
1323 | sbp2util_packet_dump(scsi_id->login_orb, sizeof(struct sbp2_login_orb), |
1324 | "sbp2 login orb", scsi_id->login_orb_dma); | |
1325 | ||
1da177e4 | 1326 | memset(scsi_id->login_response, 0, sizeof(struct sbp2_login_response)); |
1da177e4 | 1327 | |
1da177e4 LT |
1328 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
1329 | data[1] = scsi_id->login_orb_dma; | |
1330 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1331 | ||
1da177e4 | 1332 | hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8); |
1da177e4 LT |
1333 | |
1334 | /* | |
1335 | * Wait for login status (up to 20 seconds)... | |
1336 | */ | |
e8398bb7 SR |
1337 | if (sbp2util_access_timeout(scsi_id, 20*HZ)) { |
1338 | SBP2_ERR("Error logging into SBP-2 device - timed out"); | |
a237f35f | 1339 | return -EIO; |
1da177e4 LT |
1340 | } |
1341 | ||
1342 | /* | |
1343 | * Sanity. Make sure status returned matches login orb. | |
1344 | */ | |
1345 | if (scsi_id->status_block.ORB_offset_lo != scsi_id->login_orb_dma) { | |
6065772d | 1346 | SBP2_ERR("Error logging into SBP-2 device - timed out"); |
a237f35f | 1347 | return -EIO; |
1da177e4 LT |
1348 | } |
1349 | ||
6065772d SR |
1350 | if (STATUS_TEST_RDS(scsi_id->status_block.ORB_offset_hi_misc)) { |
1351 | SBP2_ERR("Error logging into SBP-2 device - failed"); | |
a237f35f | 1352 | return -EIO; |
1da177e4 LT |
1353 | } |
1354 | ||
1355 | /* | |
1356 | * Byte swap the login response, for use when reconnecting or | |
1357 | * logging out. | |
1358 | */ | |
1359 | sbp2util_cpu_to_be32_buffer(scsi_id->login_response, sizeof(struct sbp2_login_response)); | |
1360 | ||
1361 | /* | |
1362 | * Grab our command block agent address from the login response. | |
1363 | */ | |
1364 | SBP2_DEBUG("command_block_agent_hi = %x", | |
1365 | (unsigned int)scsi_id->login_response->command_block_agent_hi); | |
1366 | SBP2_DEBUG("command_block_agent_lo = %x", | |
1367 | (unsigned int)scsi_id->login_response->command_block_agent_lo); | |
1368 | ||
1369 | scsi_id->sbp2_command_block_agent_addr = | |
1370 | ((u64)scsi_id->login_response->command_block_agent_hi) << 32; | |
1371 | scsi_id->sbp2_command_block_agent_addr |= ((u64)scsi_id->login_response->command_block_agent_lo); | |
1372 | scsi_id->sbp2_command_block_agent_addr &= 0x0000ffffffffffffULL; | |
1373 | ||
1374 | SBP2_INFO("Logged into SBP-2 device"); | |
a237f35f | 1375 | return 0; |
1da177e4 LT |
1376 | } |
1377 | ||
1378 | /* | |
1379 | * This function is called in order to logout from a particular SBP-2 | |
1380 | * device, usually called during driver unload. | |
1381 | */ | |
1382 | static int sbp2_logout_device(struct scsi_id_instance_data *scsi_id) | |
1383 | { | |
1384 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1385 | quadlet_t data[2]; | |
1386 | int error; | |
1387 | ||
d024ebc6 | 1388 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
1389 | |
1390 | /* | |
1391 | * Set-up logout ORB | |
1392 | */ | |
1393 | scsi_id->logout_orb->reserved1 = 0x0; | |
1394 | scsi_id->logout_orb->reserved2 = 0x0; | |
1395 | scsi_id->logout_orb->reserved3 = 0x0; | |
1396 | scsi_id->logout_orb->reserved4 = 0x0; | |
1397 | ||
1398 | scsi_id->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST); | |
1399 | scsi_id->logout_orb->login_ID_misc |= ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID); | |
1400 | ||
1401 | /* Notify us when complete */ | |
1402 | scsi_id->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1); | |
1403 | ||
1404 | scsi_id->logout_orb->reserved5 = 0x0; | |
35bdddb8 SR |
1405 | scsi_id->logout_orb->status_fifo_hi = |
1406 | ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id); | |
1407 | scsi_id->logout_orb->status_fifo_lo = | |
1408 | ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr); | |
1da177e4 LT |
1409 | |
1410 | /* | |
1411 | * Byte swap ORB if necessary | |
1412 | */ | |
1413 | sbp2util_cpu_to_be32_buffer(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb)); | |
1414 | ||
1415 | sbp2util_packet_dump(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb), | |
1416 | "sbp2 logout orb", scsi_id->logout_orb_dma); | |
1417 | ||
1418 | /* | |
1419 | * Ok, let's write to the target's management agent register | |
1420 | */ | |
1421 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); | |
1422 | data[1] = scsi_id->logout_orb_dma; | |
1423 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1424 | ||
1da177e4 | 1425 | error = hpsb_node_write(scsi_id->ne, |
a237f35f | 1426 | scsi_id->sbp2_management_agent_addr, data, 8); |
1da177e4 LT |
1427 | if (error) |
1428 | return error; | |
1429 | ||
1430 | /* Wait for device to logout...1 second. */ | |
e8398bb7 | 1431 | if (sbp2util_access_timeout(scsi_id, HZ)) |
1da177e4 LT |
1432 | return -EIO; |
1433 | ||
1434 | SBP2_INFO("Logged out of SBP-2 device"); | |
a237f35f | 1435 | return 0; |
1da177e4 LT |
1436 | } |
1437 | ||
1438 | /* | |
1439 | * This function is called in order to reconnect to a particular SBP-2 | |
1440 | * device, after a bus reset. | |
1441 | */ | |
1442 | static int sbp2_reconnect_device(struct scsi_id_instance_data *scsi_id) | |
1443 | { | |
1444 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1445 | quadlet_t data[2]; | |
1446 | int error; | |
1447 | ||
d024ebc6 | 1448 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
1449 | |
1450 | /* | |
1451 | * Set-up reconnect ORB | |
1452 | */ | |
1453 | scsi_id->reconnect_orb->reserved1 = 0x0; | |
1454 | scsi_id->reconnect_orb->reserved2 = 0x0; | |
1455 | scsi_id->reconnect_orb->reserved3 = 0x0; | |
1456 | scsi_id->reconnect_orb->reserved4 = 0x0; | |
1457 | ||
1458 | scsi_id->reconnect_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST); | |
1459 | scsi_id->reconnect_orb->login_ID_misc |= | |
1460 | ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID); | |
1461 | ||
1462 | /* Notify us when complete */ | |
1463 | scsi_id->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1); | |
1464 | ||
1465 | scsi_id->reconnect_orb->reserved5 = 0x0; | |
35bdddb8 SR |
1466 | scsi_id->reconnect_orb->status_fifo_hi = |
1467 | ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id); | |
1468 | scsi_id->reconnect_orb->status_fifo_lo = | |
1469 | ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr); | |
1da177e4 LT |
1470 | |
1471 | /* | |
1472 | * Byte swap ORB if necessary | |
1473 | */ | |
1474 | sbp2util_cpu_to_be32_buffer(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb)); | |
1475 | ||
1476 | sbp2util_packet_dump(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb), | |
1477 | "sbp2 reconnect orb", scsi_id->reconnect_orb_dma); | |
1478 | ||
1da177e4 LT |
1479 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
1480 | data[1] = scsi_id->reconnect_orb_dma; | |
1481 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1482 | ||
1da177e4 | 1483 | error = hpsb_node_write(scsi_id->ne, |
a237f35f | 1484 | scsi_id->sbp2_management_agent_addr, data, 8); |
1da177e4 LT |
1485 | if (error) |
1486 | return error; | |
1487 | ||
1488 | /* | |
1489 | * Wait for reconnect status (up to 1 second)... | |
1490 | */ | |
e8398bb7 SR |
1491 | if (sbp2util_access_timeout(scsi_id, HZ)) { |
1492 | SBP2_ERR("Error reconnecting to SBP-2 device - timed out"); | |
a237f35f | 1493 | return -EIO; |
1da177e4 LT |
1494 | } |
1495 | ||
1496 | /* | |
1497 | * Sanity. Make sure status returned matches reconnect orb. | |
1498 | */ | |
1499 | if (scsi_id->status_block.ORB_offset_lo != scsi_id->reconnect_orb_dma) { | |
6065772d | 1500 | SBP2_ERR("Error reconnecting to SBP-2 device - timed out"); |
a237f35f | 1501 | return -EIO; |
1da177e4 LT |
1502 | } |
1503 | ||
6065772d SR |
1504 | if (STATUS_TEST_RDS(scsi_id->status_block.ORB_offset_hi_misc)) { |
1505 | SBP2_ERR("Error reconnecting to SBP-2 device - failed"); | |
a237f35f | 1506 | return -EIO; |
1da177e4 LT |
1507 | } |
1508 | ||
1509 | HPSB_DEBUG("Reconnected to SBP-2 device"); | |
a237f35f | 1510 | return 0; |
1da177e4 LT |
1511 | } |
1512 | ||
1513 | /* | |
1514 | * This function is called in order to set the busy timeout (number of | |
1515 | * retries to attempt) on the sbp2 device. | |
1516 | */ | |
1517 | static int sbp2_set_busy_timeout(struct scsi_id_instance_data *scsi_id) | |
1518 | { | |
1519 | quadlet_t data; | |
1520 | ||
d024ebc6 | 1521 | SBP2_DEBUG_ENTER(); |
1da177e4 | 1522 | |
1da177e4 | 1523 | data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE); |
d024ebc6 SR |
1524 | if (hpsb_node_write(scsi_id->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4)) |
1525 | SBP2_ERR("%s error", __FUNCTION__); | |
a237f35f | 1526 | return 0; |
1da177e4 LT |
1527 | } |
1528 | ||
1da177e4 LT |
1529 | /* |
1530 | * This function is called to parse sbp2 device's config rom unit | |
1531 | * directory. Used to determine things like sbp2 management agent offset, | |
1532 | * and command set used (SCSI or RBC). | |
1533 | */ | |
1534 | static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id, | |
1535 | struct unit_directory *ud) | |
1536 | { | |
1537 | struct csr1212_keyval *kv; | |
1538 | struct csr1212_dentry *dentry; | |
1539 | u64 management_agent_addr; | |
1540 | u32 command_set_spec_id, command_set, unit_characteristics, | |
24d3bf88 SR |
1541 | firmware_revision; |
1542 | unsigned workarounds; | |
1da177e4 LT |
1543 | int i; |
1544 | ||
d024ebc6 | 1545 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
1546 | |
1547 | management_agent_addr = 0x0; | |
1548 | command_set_spec_id = 0x0; | |
1549 | command_set = 0x0; | |
1550 | unit_characteristics = 0x0; | |
1551 | firmware_revision = 0x0; | |
1552 | ||
1553 | /* Handle different fields in the unit directory, based on keys */ | |
1554 | csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) { | |
1555 | switch (kv->key.id) { | |
1556 | case CSR1212_KV_ID_DEPENDENT_INFO: | |
1557 | if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET) { | |
1558 | /* Save off the management agent address */ | |
1559 | management_agent_addr = | |
a237f35f SR |
1560 | CSR1212_REGISTER_SPACE_BASE + |
1561 | (kv->value.csr_offset << 2); | |
1da177e4 LT |
1562 | |
1563 | SBP2_DEBUG("sbp2_management_agent_addr = %x", | |
a237f35f | 1564 | (unsigned int)management_agent_addr); |
1da177e4 | 1565 | } else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { |
a237f35f SR |
1566 | scsi_id->sbp2_lun = |
1567 | ORB_SET_LUN(kv->value.immediate); | |
1da177e4 LT |
1568 | } |
1569 | break; | |
1570 | ||
1571 | case SBP2_COMMAND_SET_SPEC_ID_KEY: | |
1572 | /* Command spec organization */ | |
1573 | command_set_spec_id = kv->value.immediate; | |
1574 | SBP2_DEBUG("sbp2_command_set_spec_id = %x", | |
a237f35f | 1575 | (unsigned int)command_set_spec_id); |
1da177e4 LT |
1576 | break; |
1577 | ||
1578 | case SBP2_COMMAND_SET_KEY: | |
1579 | /* Command set used by sbp2 device */ | |
1580 | command_set = kv->value.immediate; | |
1581 | SBP2_DEBUG("sbp2_command_set = %x", | |
a237f35f | 1582 | (unsigned int)command_set); |
1da177e4 LT |
1583 | break; |
1584 | ||
1585 | case SBP2_UNIT_CHARACTERISTICS_KEY: | |
1586 | /* | |
1587 | * Unit characterisitcs (orb related stuff | |
1588 | * that I'm not yet paying attention to) | |
1589 | */ | |
1590 | unit_characteristics = kv->value.immediate; | |
1591 | SBP2_DEBUG("sbp2_unit_characteristics = %x", | |
a237f35f | 1592 | (unsigned int)unit_characteristics); |
1da177e4 LT |
1593 | break; |
1594 | ||
1595 | case SBP2_FIRMWARE_REVISION_KEY: | |
1596 | /* Firmware revision */ | |
1597 | firmware_revision = kv->value.immediate; | |
24d3bf88 SR |
1598 | SBP2_DEBUG("sbp2_firmware_revision = %x", |
1599 | (unsigned int)firmware_revision); | |
1da177e4 LT |
1600 | break; |
1601 | ||
1602 | default: | |
1603 | break; | |
1604 | } | |
1605 | } | |
1606 | ||
24d3bf88 | 1607 | workarounds = sbp2_default_workarounds; |
1da177e4 | 1608 | |
679c0cd2 SR |
1609 | if (!(workarounds & SBP2_WORKAROUND_OVERRIDE)) |
1610 | for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { | |
1611 | if (sbp2_workarounds_table[i].firmware_revision && | |
1612 | sbp2_workarounds_table[i].firmware_revision != | |
1613 | (firmware_revision & 0xffff00)) | |
1614 | continue; | |
1615 | if (sbp2_workarounds_table[i].model_id && | |
1616 | sbp2_workarounds_table[i].model_id != ud->model_id) | |
1617 | continue; | |
1618 | workarounds |= sbp2_workarounds_table[i].workarounds; | |
1619 | break; | |
1620 | } | |
1da177e4 | 1621 | |
24d3bf88 | 1622 | if (workarounds) |
e9a1c52c SR |
1623 | SBP2_INFO("Workarounds for node " NODE_BUS_FMT ": 0x%x " |
1624 | "(firmware_revision 0x%06x, vendor_id 0x%06x," | |
1625 | " model_id 0x%06x)", | |
24d3bf88 | 1626 | NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid), |
e9a1c52c SR |
1627 | workarounds, firmware_revision, |
1628 | ud->vendor_id ? ud->vendor_id : ud->ne->vendor_id, | |
1629 | ud->model_id); | |
24d3bf88 SR |
1630 | |
1631 | /* We would need one SCSI host template for each target to adjust | |
1632 | * max_sectors on the fly, therefore warn only. */ | |
1633 | if (workarounds & SBP2_WORKAROUND_128K_MAX_TRANS && | |
1634 | (max_sectors * 512) > (128 * 1024)) | |
1635 | SBP2_WARN("Node " NODE_BUS_FMT ": Bridge only supports 128KB " | |
1636 | "max transfer size. WARNING: Current max_sectors " | |
1637 | "setting is larger than 128KB (%d sectors)", | |
1638 | NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid), | |
1639 | max_sectors); | |
1640 | ||
1da177e4 LT |
1641 | /* If this is a logical unit directory entry, process the parent |
1642 | * to get the values. */ | |
1643 | if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) { | |
1644 | struct unit_directory *parent_ud = | |
1645 | container_of(ud->device.parent, struct unit_directory, device); | |
1646 | sbp2_parse_unit_directory(scsi_id, parent_ud); | |
1647 | } else { | |
1648 | scsi_id->sbp2_management_agent_addr = management_agent_addr; | |
1649 | scsi_id->sbp2_command_set_spec_id = command_set_spec_id; | |
1650 | scsi_id->sbp2_command_set = command_set; | |
1651 | scsi_id->sbp2_unit_characteristics = unit_characteristics; | |
1652 | scsi_id->sbp2_firmware_revision = firmware_revision; | |
1653 | scsi_id->workarounds = workarounds; | |
1654 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN) | |
e309fc6d | 1655 | scsi_id->sbp2_lun = ORB_SET_LUN(ud->lun); |
1da177e4 LT |
1656 | } |
1657 | } | |
1658 | ||
fd23ade8 BC |
1659 | #define SBP2_PAYLOAD_TO_BYTES(p) (1 << ((p) + 2)) |
1660 | ||
1da177e4 LT |
1661 | /* |
1662 | * This function is called in order to determine the max speed and packet | |
1663 | * size we can use in our ORBs. Note, that we (the driver and host) only | |
1664 | * initiate the transaction. The SBP-2 device actually transfers the data | |
1665 | * (by reading from the DMA area we tell it). This means that the SBP-2 | |
1666 | * device decides the actual maximum data it can transfer. We just tell it | |
1667 | * the speed that it needs to use, and the max_rec the host supports, and | |
1668 | * it takes care of the rest. | |
1669 | */ | |
1670 | static int sbp2_max_speed_and_size(struct scsi_id_instance_data *scsi_id) | |
1671 | { | |
1672 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
fd23ade8 | 1673 | u8 payload; |
1da177e4 | 1674 | |
d024ebc6 | 1675 | SBP2_DEBUG_ENTER(); |
1da177e4 | 1676 | |
a237f35f | 1677 | scsi_id->speed_code = |
647dcb5f | 1678 | hi->host->speed[NODEID_TO_NODE(scsi_id->ne->nodeid)]; |
1da177e4 LT |
1679 | |
1680 | /* Bump down our speed if the user requested it */ | |
1681 | if (scsi_id->speed_code > max_speed) { | |
1682 | scsi_id->speed_code = max_speed; | |
1683 | SBP2_ERR("Forcing SBP-2 max speed down to %s", | |
1684 | hpsb_speedto_str[scsi_id->speed_code]); | |
1685 | } | |
1686 | ||
1687 | /* Payload size is the lesser of what our speed supports and what | |
1688 | * our host supports. */ | |
fd23ade8 BC |
1689 | payload = min(sbp2_speedto_max_payload[scsi_id->speed_code], |
1690 | (u8) (hi->host->csr.max_rec - 1)); | |
1691 | ||
1692 | /* If physical DMA is off, work around limitation in ohci1394: | |
1693 | * packet size must not exceed PAGE_SIZE */ | |
1694 | if (scsi_id->ne->host->low_addr_space < (1ULL << 32)) | |
1695 | while (SBP2_PAYLOAD_TO_BYTES(payload) + 24 > PAGE_SIZE && | |
1696 | payload) | |
1697 | payload--; | |
1da177e4 LT |
1698 | |
1699 | HPSB_DEBUG("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]", | |
1700 | NODE_BUS_ARGS(hi->host, scsi_id->ne->nodeid), | |
1701 | hpsb_speedto_str[scsi_id->speed_code], | |
fd23ade8 | 1702 | SBP2_PAYLOAD_TO_BYTES(payload)); |
1da177e4 | 1703 | |
fd23ade8 | 1704 | scsi_id->max_payload_size = payload; |
a237f35f | 1705 | return 0; |
1da177e4 LT |
1706 | } |
1707 | ||
1708 | /* | |
1709 | * This function is called in order to perform a SBP-2 agent reset. | |
1710 | */ | |
1711 | static int sbp2_agent_reset(struct scsi_id_instance_data *scsi_id, int wait) | |
1712 | { | |
1713 | quadlet_t data; | |
1714 | u64 addr; | |
1715 | int retval; | |
cc078189 | 1716 | unsigned long flags; |
1da177e4 | 1717 | |
d024ebc6 | 1718 | SBP2_DEBUG_ENTER(); |
1da177e4 | 1719 | |
09ee67ab SR |
1720 | cancel_delayed_work(&scsi_id->protocol_work); |
1721 | if (wait) | |
1722 | flush_scheduled_work(); | |
1723 | ||
1da177e4 LT |
1724 | data = ntohl(SBP2_AGENT_RESET_DATA); |
1725 | addr = scsi_id->sbp2_command_block_agent_addr + SBP2_AGENT_RESET_OFFSET; | |
1726 | ||
1727 | if (wait) | |
1728 | retval = hpsb_node_write(scsi_id->ne, addr, &data, 4); | |
1729 | else | |
1730 | retval = sbp2util_node_write_no_wait(scsi_id->ne, addr, &data, 4); | |
1731 | ||
1732 | if (retval < 0) { | |
1733 | SBP2_ERR("hpsb_node_write failed.\n"); | |
1734 | return -EIO; | |
1735 | } | |
1736 | ||
1737 | /* | |
1738 | * Need to make sure orb pointer is written on next command | |
1739 | */ | |
cc078189 | 1740 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 | 1741 | scsi_id->last_orb = NULL; |
cc078189 | 1742 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 | 1743 | |
a237f35f | 1744 | return 0; |
1da177e4 LT |
1745 | } |
1746 | ||
cf8d2c09 SR |
1747 | static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb, |
1748 | struct sbp2scsi_host_info *hi, | |
1749 | struct sbp2_command_info *command, | |
1750 | unsigned int scsi_use_sg, | |
1751 | struct scatterlist *sgpnt, | |
1752 | u32 orb_direction, | |
1753 | enum dma_data_direction dma_dir) | |
1754 | { | |
1755 | command->dma_dir = dma_dir; | |
1756 | orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1757 | orb->misc |= ORB_SET_DIRECTION(orb_direction); | |
1758 | ||
1759 | /* Special case if only one element (and less than 64KB in size) */ | |
1760 | if ((scsi_use_sg == 1) && | |
1761 | (sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) { | |
1762 | ||
1763 | SBP2_DEBUG("Only one s/g element"); | |
1764 | command->dma_size = sgpnt[0].length; | |
1765 | command->dma_type = CMD_DMA_PAGE; | |
1766 | command->cmd_dma = pci_map_page(hi->host->pdev, | |
1767 | sgpnt[0].page, | |
1768 | sgpnt[0].offset, | |
1769 | command->dma_size, | |
1770 | command->dma_dir); | |
1771 | SBP2_DMA_ALLOC("single page scatter element"); | |
1772 | ||
1773 | orb->data_descriptor_lo = command->cmd_dma; | |
1774 | orb->misc |= ORB_SET_DATA_SIZE(command->dma_size); | |
1775 | ||
1776 | } else { | |
1777 | struct sbp2_unrestricted_page_table *sg_element = | |
1778 | &command->scatter_gather_element[0]; | |
1779 | u32 sg_count, sg_len; | |
1780 | dma_addr_t sg_addr; | |
1781 | int i, count = pci_map_sg(hi->host->pdev, sgpnt, scsi_use_sg, | |
1782 | dma_dir); | |
1783 | ||
1784 | SBP2_DMA_ALLOC("scatter list"); | |
1785 | ||
1786 | command->dma_size = scsi_use_sg; | |
1787 | command->sge_buffer = sgpnt; | |
1788 | ||
1789 | /* use page tables (s/g) */ | |
1790 | orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); | |
1791 | orb->data_descriptor_lo = command->sge_dma; | |
1792 | ||
1793 | /* | |
1794 | * Loop through and fill out our sbp-2 page tables | |
1795 | * (and split up anything too large) | |
1796 | */ | |
1797 | for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) { | |
1798 | sg_len = sg_dma_len(sgpnt); | |
1799 | sg_addr = sg_dma_address(sgpnt); | |
1800 | while (sg_len) { | |
1801 | sg_element[sg_count].segment_base_lo = sg_addr; | |
1802 | if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { | |
1803 | sg_element[sg_count].length_segment_base_hi = | |
1804 | PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); | |
1805 | sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; | |
1806 | sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; | |
1807 | } else { | |
1808 | sg_element[sg_count].length_segment_base_hi = | |
1809 | PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); | |
1810 | sg_len = 0; | |
1811 | } | |
1812 | sg_count++; | |
1813 | } | |
1814 | } | |
1815 | ||
1816 | /* Number of page table (s/g) elements */ | |
1817 | orb->misc |= ORB_SET_DATA_SIZE(sg_count); | |
1818 | ||
1819 | sbp2util_packet_dump(sg_element, | |
1820 | (sizeof(struct sbp2_unrestricted_page_table)) * sg_count, | |
1821 | "sbp2 s/g list", command->sge_dma); | |
1822 | ||
1823 | /* Byte swap page tables if necessary */ | |
1824 | sbp2util_cpu_to_be32_buffer(sg_element, | |
1825 | (sizeof(struct sbp2_unrestricted_page_table)) * | |
1826 | sg_count); | |
1827 | } | |
1828 | } | |
1829 | ||
1830 | static void sbp2_prep_command_orb_no_sg(struct sbp2_command_orb *orb, | |
1831 | struct sbp2scsi_host_info *hi, | |
1832 | struct sbp2_command_info *command, | |
1833 | struct scatterlist *sgpnt, | |
1834 | u32 orb_direction, | |
1835 | unsigned int scsi_request_bufflen, | |
1836 | void *scsi_request_buffer, | |
1837 | enum dma_data_direction dma_dir) | |
1838 | { | |
1839 | command->dma_dir = dma_dir; | |
1840 | command->dma_size = scsi_request_bufflen; | |
1841 | command->dma_type = CMD_DMA_SINGLE; | |
1842 | command->cmd_dma = pci_map_single(hi->host->pdev, scsi_request_buffer, | |
1843 | command->dma_size, command->dma_dir); | |
1844 | orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1845 | orb->misc |= ORB_SET_DIRECTION(orb_direction); | |
1846 | ||
1847 | SBP2_DMA_ALLOC("single bulk"); | |
1848 | ||
1849 | /* | |
1850 | * Handle case where we get a command w/o s/g enabled (but | |
1851 | * check for transfers larger than 64K) | |
1852 | */ | |
1853 | if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) { | |
1854 | ||
1855 | orb->data_descriptor_lo = command->cmd_dma; | |
1856 | orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen); | |
1857 | ||
1858 | } else { | |
1859 | struct sbp2_unrestricted_page_table *sg_element = | |
1860 | &command->scatter_gather_element[0]; | |
1861 | u32 sg_count, sg_len; | |
1862 | dma_addr_t sg_addr; | |
1863 | ||
1864 | /* | |
1865 | * Need to turn this into page tables, since the | |
1866 | * buffer is too large. | |
1867 | */ | |
1868 | orb->data_descriptor_lo = command->sge_dma; | |
1869 | ||
1870 | /* Use page tables (s/g) */ | |
1871 | orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); | |
1872 | ||
1873 | /* | |
1874 | * fill out our sbp-2 page tables (and split up | |
1875 | * the large buffer) | |
1876 | */ | |
1877 | sg_count = 0; | |
1878 | sg_len = scsi_request_bufflen; | |
1879 | sg_addr = command->cmd_dma; | |
1880 | while (sg_len) { | |
1881 | sg_element[sg_count].segment_base_lo = sg_addr; | |
1882 | if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { | |
1883 | sg_element[sg_count].length_segment_base_hi = | |
1884 | PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); | |
1885 | sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; | |
1886 | sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; | |
1887 | } else { | |
1888 | sg_element[sg_count].length_segment_base_hi = | |
1889 | PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); | |
1890 | sg_len = 0; | |
1891 | } | |
1892 | sg_count++; | |
1893 | } | |
1894 | ||
1895 | /* Number of page table (s/g) elements */ | |
1896 | orb->misc |= ORB_SET_DATA_SIZE(sg_count); | |
1897 | ||
1898 | sbp2util_packet_dump(sg_element, | |
1899 | (sizeof(struct sbp2_unrestricted_page_table)) * sg_count, | |
1900 | "sbp2 s/g list", command->sge_dma); | |
1901 | ||
1902 | /* Byte swap page tables if necessary */ | |
1903 | sbp2util_cpu_to_be32_buffer(sg_element, | |
1904 | (sizeof(struct sbp2_unrestricted_page_table)) * | |
1905 | sg_count); | |
1906 | } | |
1907 | } | |
1908 | ||
1da177e4 LT |
1909 | /* |
1910 | * This function is called to create the actual command orb and s/g list | |
1911 | * out of the scsi command itself. | |
1912 | */ | |
cf8d2c09 SR |
1913 | static void sbp2_create_command_orb(struct scsi_id_instance_data *scsi_id, |
1914 | struct sbp2_command_info *command, | |
1915 | unchar *scsi_cmd, | |
1916 | unsigned int scsi_use_sg, | |
1917 | unsigned int scsi_request_bufflen, | |
1918 | void *scsi_request_buffer, | |
1919 | enum dma_data_direction dma_dir) | |
1da177e4 LT |
1920 | { |
1921 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
a237f35f | 1922 | struct scatterlist *sgpnt = (struct scatterlist *)scsi_request_buffer; |
1da177e4 | 1923 | struct sbp2_command_orb *command_orb = &command->command_orb; |
cf8d2c09 | 1924 | u32 orb_direction; |
1da177e4 LT |
1925 | |
1926 | /* | |
1927 | * Set-up our command ORB.. | |
1928 | * | |
1929 | * NOTE: We're doing unrestricted page tables (s/g), as this is | |
1930 | * best performance (at least with the devices I have). This means | |
1931 | * that data_size becomes the number of s/g elements, and | |
1932 | * page_size should be zero (for unrestricted). | |
1933 | */ | |
1934 | command_orb->next_ORB_hi = ORB_SET_NULL_PTR(1); | |
1935 | command_orb->next_ORB_lo = 0x0; | |
1936 | command_orb->misc = ORB_SET_MAX_PAYLOAD(scsi_id->max_payload_size); | |
1937 | command_orb->misc |= ORB_SET_SPEED(scsi_id->speed_code); | |
a237f35f | 1938 | command_orb->misc |= ORB_SET_NOTIFY(1); /* Notify us when complete */ |
1da177e4 | 1939 | |
43863eba | 1940 | if (dma_dir == DMA_NONE) |
a237f35f | 1941 | orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; |
43863eba | 1942 | else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen) |
a237f35f | 1943 | orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA; |
43863eba | 1944 | else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen) |
a237f35f | 1945 | orb_direction = ORB_DIRECTION_READ_FROM_MEDIA; |
43863eba SR |
1946 | else { |
1947 | SBP2_WARN("Falling back to DMA_NONE"); | |
1948 | orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; | |
1da177e4 LT |
1949 | } |
1950 | ||
cf8d2c09 | 1951 | /* Set-up our pagetable stuff */ |
1da177e4 | 1952 | if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) { |
1da177e4 | 1953 | SBP2_DEBUG("No data transfer"); |
1da177e4 LT |
1954 | command_orb->data_descriptor_hi = 0x0; |
1955 | command_orb->data_descriptor_lo = 0x0; | |
1956 | command_orb->misc |= ORB_SET_DIRECTION(1); | |
1da177e4 | 1957 | } else if (scsi_use_sg) { |
1da177e4 | 1958 | SBP2_DEBUG("Use scatter/gather"); |
cf8d2c09 SR |
1959 | sbp2_prep_command_orb_sg(command_orb, hi, command, scsi_use_sg, |
1960 | sgpnt, orb_direction, dma_dir); | |
1da177e4 | 1961 | } else { |
1da177e4 | 1962 | SBP2_DEBUG("No scatter/gather"); |
cf8d2c09 SR |
1963 | sbp2_prep_command_orb_no_sg(command_orb, hi, command, sgpnt, |
1964 | orb_direction, scsi_request_bufflen, | |
1965 | scsi_request_buffer, dma_dir); | |
1da177e4 LT |
1966 | } |
1967 | ||
cf8d2c09 | 1968 | /* Byte swap command ORB if necessary */ |
1da177e4 LT |
1969 | sbp2util_cpu_to_be32_buffer(command_orb, sizeof(struct sbp2_command_orb)); |
1970 | ||
cf8d2c09 | 1971 | /* Put our scsi command in the command ORB */ |
1da177e4 LT |
1972 | memset(command_orb->cdb, 0, 12); |
1973 | memcpy(command_orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd)); | |
1da177e4 LT |
1974 | } |
1975 | ||
1976 | /* | |
1977 | * This function is called in order to begin a regular SBP-2 command. | |
1978 | */ | |
28212767 | 1979 | static void sbp2_link_orb_command(struct scsi_id_instance_data *scsi_id, |
1da177e4 LT |
1980 | struct sbp2_command_info *command) |
1981 | { | |
1982 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1983 | struct sbp2_command_orb *command_orb = &command->command_orb; | |
cc078189 SR |
1984 | struct sbp2_command_orb *last_orb; |
1985 | dma_addr_t last_orb_dma; | |
1986 | u64 addr = scsi_id->sbp2_command_block_agent_addr; | |
1987 | quadlet_t data[2]; | |
1988 | size_t length; | |
1989 | unsigned long flags; | |
1da177e4 LT |
1990 | |
1991 | outstanding_orb_incr; | |
1992 | SBP2_ORB_DEBUG("sending command orb %p, total orbs = %x", | |
a237f35f | 1993 | command_orb, global_outstanding_command_orbs); |
1da177e4 LT |
1994 | |
1995 | pci_dma_sync_single_for_device(hi->host->pdev, command->command_orb_dma, | |
1996 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 1997 | PCI_DMA_TODEVICE); |
1da177e4 LT |
1998 | pci_dma_sync_single_for_device(hi->host->pdev, command->sge_dma, |
1999 | sizeof(command->scatter_gather_element), | |
2000 | PCI_DMA_BIDIRECTIONAL); | |
2001 | /* | |
2002 | * Check to see if there are any previous orbs to use | |
2003 | */ | |
cc078189 SR |
2004 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
2005 | last_orb = scsi_id->last_orb; | |
2006 | last_orb_dma = scsi_id->last_orb_dma; | |
2007 | if (!last_orb) { | |
1da177e4 | 2008 | /* |
cc078189 SR |
2009 | * last_orb == NULL means: We know that the target's fetch agent |
2010 | * is not active right now. | |
1da177e4 | 2011 | */ |
cc078189 | 2012 | addr += SBP2_ORB_POINTER_OFFSET; |
1da177e4 LT |
2013 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
2014 | data[1] = command->command_orb_dma; | |
2015 | sbp2util_cpu_to_be32_buffer(data, 8); | |
cc078189 | 2016 | length = 8; |
1da177e4 | 2017 | } else { |
1da177e4 | 2018 | /* |
cc078189 SR |
2019 | * last_orb != NULL means: We know that the target's fetch agent |
2020 | * is (very probably) not dead or in reset state right now. | |
2021 | * We have an ORB already sent that we can append a new one to. | |
2022 | * The target's fetch agent may or may not have read this | |
2023 | * previous ORB yet. | |
1da177e4 | 2024 | */ |
cc078189 SR |
2025 | pci_dma_sync_single_for_cpu(hi->host->pdev, last_orb_dma, |
2026 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 2027 | PCI_DMA_TODEVICE); |
cc078189 SR |
2028 | last_orb->next_ORB_lo = cpu_to_be32(command->command_orb_dma); |
2029 | wmb(); | |
1da177e4 | 2030 | /* Tells hardware that this pointer is valid */ |
cc078189 SR |
2031 | last_orb->next_ORB_hi = 0; |
2032 | pci_dma_sync_single_for_device(hi->host->pdev, last_orb_dma, | |
1da177e4 | 2033 | sizeof(struct sbp2_command_orb), |
d4018d7f | 2034 | PCI_DMA_TODEVICE); |
cc078189 SR |
2035 | addr += SBP2_DOORBELL_OFFSET; |
2036 | data[0] = 0; | |
2037 | length = 4; | |
2038 | } | |
2039 | scsi_id->last_orb = command_orb; | |
2040 | scsi_id->last_orb_dma = command->command_orb_dma; | |
2041 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
1da177e4 | 2042 | |
cc078189 SR |
2043 | SBP2_ORB_DEBUG("write to %s register, command orb %p", |
2044 | last_orb ? "DOORBELL" : "ORB_POINTER", command_orb); | |
09ee67ab SR |
2045 | if (sbp2util_node_write_no_wait(scsi_id->ne, addr, data, length)) { |
2046 | /* | |
2047 | * sbp2util_node_write_no_wait failed. We certainly ran out | |
2048 | * of transaction labels, perhaps just because there were no | |
2049 | * context switches which gave khpsbpkt a chance to collect | |
2050 | * free tlabels. Try again in non-atomic context. If necessary, | |
2051 | * the workqueue job will sleep to guaranteedly get a tlabel. | |
2052 | * We do not accept new commands until the job is over. | |
2053 | */ | |
2054 | scsi_block_requests(scsi_id->scsi_host); | |
c4028958 | 2055 | PREPARE_DELAYED_WORK(&scsi_id->protocol_work, |
09ee67ab | 2056 | last_orb ? sbp2util_write_doorbell: |
c4028958 DH |
2057 | sbp2util_write_orb_pointer); |
2058 | schedule_delayed_work(&scsi_id->protocol_work, 0); | |
09ee67ab | 2059 | } |
1da177e4 LT |
2060 | } |
2061 | ||
2062 | /* | |
2063 | * This function is called in order to begin a regular SBP-2 command. | |
2064 | */ | |
2065 | static int sbp2_send_command(struct scsi_id_instance_data *scsi_id, | |
2066 | struct scsi_cmnd *SCpnt, | |
2067 | void (*done)(struct scsi_cmnd *)) | |
2068 | { | |
2069 | unchar *cmd = (unchar *) SCpnt->cmnd; | |
2070 | unsigned int request_bufflen = SCpnt->request_bufflen; | |
2071 | struct sbp2_command_info *command; | |
2072 | ||
d024ebc6 | 2073 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
2074 | SBP2_DEBUG("SCSI transfer size = %x", request_bufflen); |
2075 | SBP2_DEBUG("SCSI s/g elements = %x", (unsigned int)SCpnt->use_sg); | |
2076 | ||
2077 | /* | |
2078 | * Allocate a command orb and s/g structure | |
2079 | */ | |
2080 | command = sbp2util_allocate_command_orb(scsi_id, SCpnt, done); | |
2081 | if (!command) { | |
a237f35f | 2082 | return -EIO; |
1da177e4 LT |
2083 | } |
2084 | ||
1da177e4 LT |
2085 | /* |
2086 | * Now actually fill in the comamnd orb and sbp2 s/g list | |
2087 | */ | |
2088 | sbp2_create_command_orb(scsi_id, command, cmd, SCpnt->use_sg, | |
2089 | request_bufflen, SCpnt->request_buffer, | |
2090 | SCpnt->sc_data_direction); | |
1da177e4 LT |
2091 | |
2092 | sbp2util_packet_dump(&command->command_orb, sizeof(struct sbp2_command_orb), | |
2093 | "sbp2 command orb", command->command_orb_dma); | |
2094 | ||
1da177e4 LT |
2095 | /* |
2096 | * Link up the orb, and ring the doorbell if needed | |
2097 | */ | |
2098 | sbp2_link_orb_command(scsi_id, command); | |
2099 | ||
a237f35f | 2100 | return 0; |
1da177e4 LT |
2101 | } |
2102 | ||
1da177e4 LT |
2103 | /* |
2104 | * Translates SBP-2 status into SCSI sense data for check conditions | |
2105 | */ | |
2106 | static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, unchar *sense_data) | |
2107 | { | |
d024ebc6 | 2108 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
2109 | |
2110 | /* | |
2111 | * Ok, it's pretty ugly... ;-) | |
2112 | */ | |
2113 | sense_data[0] = 0x70; | |
2114 | sense_data[1] = 0x0; | |
2115 | sense_data[2] = sbp2_status[9]; | |
2116 | sense_data[3] = sbp2_status[12]; | |
2117 | sense_data[4] = sbp2_status[13]; | |
2118 | sense_data[5] = sbp2_status[14]; | |
2119 | sense_data[6] = sbp2_status[15]; | |
2120 | sense_data[7] = 10; | |
2121 | sense_data[8] = sbp2_status[16]; | |
2122 | sense_data[9] = sbp2_status[17]; | |
2123 | sense_data[10] = sbp2_status[18]; | |
2124 | sense_data[11] = sbp2_status[19]; | |
2125 | sense_data[12] = sbp2_status[10]; | |
2126 | sense_data[13] = sbp2_status[11]; | |
2127 | sense_data[14] = sbp2_status[20]; | |
2128 | sense_data[15] = sbp2_status[21]; | |
2129 | ||
a237f35f | 2130 | return sbp2_status[8] & 0x3f; /* return scsi status */ |
1da177e4 LT |
2131 | } |
2132 | ||
1da177e4 LT |
2133 | /* |
2134 | * This function deals with status writes from the SBP-2 device | |
2135 | */ | |
3e98eab4 SR |
2136 | static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, |
2137 | int destid, quadlet_t *data, u64 addr, | |
2138 | size_t length, u16 fl) | |
1da177e4 LT |
2139 | { |
2140 | struct sbp2scsi_host_info *hi; | |
2141 | struct scsi_id_instance_data *scsi_id = NULL, *scsi_id_tmp; | |
1da177e4 | 2142 | struct scsi_cmnd *SCpnt = NULL; |
3e98eab4 | 2143 | struct sbp2_status_block *sb; |
1da177e4 LT |
2144 | u32 scsi_status = SBP2_SCSI_STATUS_GOOD; |
2145 | struct sbp2_command_info *command; | |
79456197 | 2146 | unsigned long flags; |
1da177e4 | 2147 | |
d024ebc6 | 2148 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
2149 | |
2150 | sbp2util_packet_dump(data, length, "sbp2 status write by device", (u32)addr); | |
2151 | ||
6065772d SR |
2152 | if (unlikely(length < 8 || length > sizeof(struct sbp2_status_block))) { |
2153 | SBP2_ERR("Wrong size of status block"); | |
2154 | return RCODE_ADDRESS_ERROR; | |
2155 | } | |
2156 | if (unlikely(!host)) { | |
1da177e4 | 2157 | SBP2_ERR("host is NULL - this is bad!"); |
a237f35f | 2158 | return RCODE_ADDRESS_ERROR; |
1da177e4 | 2159 | } |
1da177e4 | 2160 | hi = hpsb_get_hostinfo(&sbp2_highlevel, host); |
6065772d | 2161 | if (unlikely(!hi)) { |
1da177e4 | 2162 | SBP2_ERR("host info is NULL - this is bad!"); |
a237f35f | 2163 | return RCODE_ADDRESS_ERROR; |
1da177e4 | 2164 | } |
1da177e4 | 2165 | /* |
35bdddb8 SR |
2166 | * Find our scsi_id structure by looking at the status fifo address |
2167 | * written to by the sbp2 device. | |
1da177e4 | 2168 | */ |
1da177e4 | 2169 | list_for_each_entry(scsi_id_tmp, &hi->scsi_ids, scsi_list) { |
35bdddb8 SR |
2170 | if (scsi_id_tmp->ne->nodeid == nodeid && |
2171 | scsi_id_tmp->status_fifo_addr == addr) { | |
1da177e4 LT |
2172 | scsi_id = scsi_id_tmp; |
2173 | break; | |
2174 | } | |
2175 | } | |
6065772d | 2176 | if (unlikely(!scsi_id)) { |
1da177e4 | 2177 | SBP2_ERR("scsi_id is NULL - device is gone?"); |
a237f35f | 2178 | return RCODE_ADDRESS_ERROR; |
1da177e4 LT |
2179 | } |
2180 | ||
2181 | /* | |
3e98eab4 SR |
2182 | * Put response into scsi_id status fifo buffer. The first two bytes |
2183 | * come in big endian bit order. Often the target writes only a | |
2184 | * truncated status block, minimally the first two quadlets. The rest | |
2185 | * is implied to be zeros. | |
1da177e4 | 2186 | */ |
3e98eab4 SR |
2187 | sb = &scsi_id->status_block; |
2188 | memset(sb->command_set_dependent, 0, sizeof(sb->command_set_dependent)); | |
2189 | memcpy(sb, data, length); | |
2190 | sbp2util_be32_to_cpu_buffer(sb, 8); | |
1da177e4 LT |
2191 | |
2192 | /* | |
6065772d | 2193 | * Ignore unsolicited status. Handle command ORB status. |
1da177e4 | 2194 | */ |
6065772d SR |
2195 | if (unlikely(STATUS_GET_SRC(sb->ORB_offset_hi_misc) == 2)) |
2196 | command = NULL; | |
2197 | else | |
2198 | command = sbp2util_find_command_for_orb(scsi_id, | |
2199 | sb->ORB_offset_lo); | |
1da177e4 | 2200 | if (command) { |
1da177e4 LT |
2201 | SBP2_DEBUG("Found status for command ORB"); |
2202 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma, | |
2203 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 2204 | PCI_DMA_TODEVICE); |
1da177e4 LT |
2205 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma, |
2206 | sizeof(command->scatter_gather_element), | |
2207 | PCI_DMA_BIDIRECTIONAL); | |
2208 | ||
2209 | SBP2_ORB_DEBUG("matched command orb %p", &command->command_orb); | |
2210 | outstanding_orb_decr; | |
2211 | ||
2212 | /* | |
3e98eab4 SR |
2213 | * Matched status with command, now grab scsi command pointers |
2214 | * and check status. | |
1da177e4 | 2215 | */ |
6065772d SR |
2216 | /* |
2217 | * FIXME: If the src field in the status is 1, the ORB DMA must | |
2218 | * not be reused until status for a subsequent ORB is received. | |
2219 | */ | |
1da177e4 | 2220 | SCpnt = command->Current_SCpnt; |
24c7cd06 | 2221 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 | 2222 | sbp2util_mark_command_completed(scsi_id, command); |
24c7cd06 | 2223 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2224 | |
2225 | if (SCpnt) { | |
abbca103 SR |
2226 | u32 h = sb->ORB_offset_hi_misc; |
2227 | u32 r = STATUS_GET_RESP(h); | |
2228 | ||
2229 | if (r != RESP_STATUS_REQUEST_COMPLETE) { | |
2230 | SBP2_WARN("resp 0x%x, sbp_status 0x%x", | |
2231 | r, STATUS_GET_SBP_STATUS(h)); | |
6065772d | 2232 | scsi_status = |
abbca103 SR |
2233 | r == RESP_STATUS_TRANSPORT_FAILURE ? |
2234 | SBP2_SCSI_STATUS_BUSY : | |
6065772d | 2235 | SBP2_SCSI_STATUS_COMMAND_TERMINATED; |
abbca103 | 2236 | } |
1da177e4 | 2237 | /* |
3e98eab4 | 2238 | * See if the target stored any scsi status information. |
1da177e4 | 2239 | */ |
abbca103 | 2240 | if (STATUS_GET_LEN(h) > 1) { |
1da177e4 | 2241 | SBP2_DEBUG("CHECK CONDITION"); |
3e98eab4 SR |
2242 | scsi_status = sbp2_status_to_sense_data( |
2243 | (unchar *)sb, SCpnt->sense_buffer); | |
1da177e4 | 2244 | } |
1da177e4 | 2245 | /* |
3e98eab4 SR |
2246 | * Check to see if the dead bit is set. If so, we'll |
2247 | * have to initiate a fetch agent reset. | |
1da177e4 | 2248 | */ |
abbca103 | 2249 | if (STATUS_TEST_DEAD(h)) { |
3e98eab4 SR |
2250 | SBP2_DEBUG("Dead bit set - " |
2251 | "initiating fetch agent reset"); | |
1da177e4 LT |
2252 | sbp2_agent_reset(scsi_id, 0); |
2253 | } | |
1da177e4 LT |
2254 | SBP2_ORB_DEBUG("completing command orb %p", &command->command_orb); |
2255 | } | |
2256 | ||
2257 | /* | |
cc078189 SR |
2258 | * Check here to see if there are no commands in-use. If there |
2259 | * are none, we know that the fetch agent left the active state | |
2260 | * _and_ that we did not reactivate it yet. Therefore clear | |
2261 | * last_orb so that next time we write directly to the | |
2262 | * ORB_POINTER register. That way the fetch agent does not need | |
2263 | * to refetch the next_ORB. | |
1da177e4 | 2264 | */ |
79456197 | 2265 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
cc078189 | 2266 | if (list_empty(&scsi_id->sbp2_command_orb_inuse)) |
1da177e4 | 2267 | scsi_id->last_orb = NULL; |
79456197 | 2268 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2269 | |
2270 | } else { | |
1da177e4 LT |
2271 | /* |
2272 | * It's probably a login/logout/reconnect status. | |
2273 | */ | |
3e98eab4 SR |
2274 | if ((sb->ORB_offset_lo == scsi_id->reconnect_orb_dma) || |
2275 | (sb->ORB_offset_lo == scsi_id->login_orb_dma) || | |
2276 | (sb->ORB_offset_lo == scsi_id->query_logins_orb_dma) || | |
e8398bb7 SR |
2277 | (sb->ORB_offset_lo == scsi_id->logout_orb_dma)) { |
2278 | scsi_id->access_complete = 1; | |
2279 | wake_up_interruptible(&access_wq); | |
2280 | } | |
1da177e4 LT |
2281 | } |
2282 | ||
2283 | if (SCpnt) { | |
1da177e4 LT |
2284 | SBP2_DEBUG("Completing SCSI command"); |
2285 | sbp2scsi_complete_command(scsi_id, scsi_status, SCpnt, | |
2286 | command->Current_done); | |
2287 | SBP2_ORB_DEBUG("command orb completed"); | |
2288 | } | |
2289 | ||
a237f35f | 2290 | return RCODE_COMPLETE; |
1da177e4 LT |
2291 | } |
2292 | ||
1da177e4 LT |
2293 | /************************************** |
2294 | * SCSI interface related section | |
2295 | **************************************/ | |
2296 | ||
2297 | /* | |
2298 | * This routine is the main request entry routine for doing I/O. It is | |
2299 | * called from the scsi stack directly. | |
2300 | */ | |
2301 | static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt, | |
2302 | void (*done)(struct scsi_cmnd *)) | |
2303 | { | |
2304 | struct scsi_id_instance_data *scsi_id = | |
2305 | (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; | |
2306 | struct sbp2scsi_host_info *hi; | |
abd559b1 | 2307 | int result = DID_NO_CONNECT << 16; |
1da177e4 | 2308 | |
d024ebc6 SR |
2309 | SBP2_DEBUG_ENTER(); |
2310 | #if (CONFIG_IEEE1394_SBP2_DEBUG >= 2) || defined(CONFIG_IEEE1394_SBP2_PACKET_DUMP) | |
2311 | scsi_print_command(SCpnt); | |
2312 | #endif | |
1da177e4 | 2313 | |
abd559b1 JM |
2314 | if (!sbp2util_node_is_available(scsi_id)) |
2315 | goto done; | |
1da177e4 LT |
2316 | |
2317 | hi = scsi_id->hi; | |
2318 | ||
2319 | if (!hi) { | |
2320 | SBP2_ERR("sbp2scsi_host_info is NULL - this is bad!"); | |
abd559b1 | 2321 | goto done; |
1da177e4 LT |
2322 | } |
2323 | ||
2324 | /* | |
2325 | * Until we handle multiple luns, just return selection time-out | |
2326 | * to any IO directed at non-zero LUNs | |
2327 | */ | |
abd559b1 JM |
2328 | if (SCpnt->device->lun) |
2329 | goto done; | |
1da177e4 LT |
2330 | |
2331 | /* | |
2332 | * Check for request sense command, and handle it here | |
2333 | * (autorequest sense) | |
2334 | */ | |
2335 | if (SCpnt->cmnd[0] == REQUEST_SENSE) { | |
2336 | SBP2_DEBUG("REQUEST_SENSE"); | |
2337 | memcpy(SCpnt->request_buffer, SCpnt->sense_buffer, SCpnt->request_bufflen); | |
2338 | memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer)); | |
2339 | sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_GOOD, SCpnt, done); | |
abd559b1 | 2340 | return 0; |
1da177e4 LT |
2341 | } |
2342 | ||
2343 | /* | |
2344 | * Check to see if we are in the middle of a bus reset. | |
2345 | */ | |
2346 | if (!hpsb_node_entry_valid(scsi_id->ne)) { | |
2347 | SBP2_ERR("Bus reset in progress - rejecting command"); | |
abd559b1 JM |
2348 | result = DID_BUS_BUSY << 16; |
2349 | goto done; | |
1da177e4 LT |
2350 | } |
2351 | ||
43863eba SR |
2352 | /* |
2353 | * Bidirectional commands are not yet implemented, | |
2354 | * and unknown transfer direction not handled. | |
2355 | */ | |
2356 | if (SCpnt->sc_data_direction == DMA_BIDIRECTIONAL) { | |
2357 | SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command"); | |
2358 | result = DID_ERROR << 16; | |
2359 | goto done; | |
2360 | } | |
2361 | ||
1da177e4 LT |
2362 | /* |
2363 | * Try and send our SCSI command | |
2364 | */ | |
2365 | if (sbp2_send_command(scsi_id, SCpnt, done)) { | |
2366 | SBP2_ERR("Error sending SCSI command"); | |
2367 | sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_SELECTION_TIMEOUT, | |
2368 | SCpnt, done); | |
2369 | } | |
abd559b1 | 2370 | return 0; |
1da177e4 | 2371 | |
abd559b1 JM |
2372 | done: |
2373 | SCpnt->result = result; | |
2374 | done(SCpnt); | |
2375 | return 0; | |
1da177e4 LT |
2376 | } |
2377 | ||
2378 | /* | |
2379 | * This function is called in order to complete all outstanding SBP-2 | |
2380 | * commands (in case of resets, etc.). | |
2381 | */ | |
2382 | static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id, | |
2383 | u32 status) | |
2384 | { | |
2385 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
2386 | struct list_head *lh; | |
2387 | struct sbp2_command_info *command; | |
79456197 | 2388 | unsigned long flags; |
1da177e4 | 2389 | |
d024ebc6 | 2390 | SBP2_DEBUG_ENTER(); |
1da177e4 | 2391 | |
79456197 | 2392 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2393 | while (!list_empty(&scsi_id->sbp2_command_orb_inuse)) { |
2394 | SBP2_DEBUG("Found pending command to complete"); | |
2395 | lh = scsi_id->sbp2_command_orb_inuse.next; | |
2396 | command = list_entry(lh, struct sbp2_command_info, list); | |
2397 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma, | |
2398 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 2399 | PCI_DMA_TODEVICE); |
1da177e4 LT |
2400 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma, |
2401 | sizeof(command->scatter_gather_element), | |
2402 | PCI_DMA_BIDIRECTIONAL); | |
2403 | sbp2util_mark_command_completed(scsi_id, command); | |
2404 | if (command->Current_SCpnt) { | |
2405 | command->Current_SCpnt->result = status << 16; | |
2406 | command->Current_done(command->Current_SCpnt); | |
2407 | } | |
2408 | } | |
79456197 | 2409 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2410 | |
2411 | return; | |
2412 | } | |
2413 | ||
2414 | /* | |
2415 | * This function is called in order to complete a regular SBP-2 command. | |
2416 | * | |
2417 | * This can be called in interrupt context. | |
2418 | */ | |
2419 | static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id, | |
2420 | u32 scsi_status, struct scsi_cmnd *SCpnt, | |
2421 | void (*done)(struct scsi_cmnd *)) | |
2422 | { | |
d024ebc6 | 2423 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
2424 | |
2425 | /* | |
2426 | * Sanity | |
2427 | */ | |
2428 | if (!SCpnt) { | |
2429 | SBP2_ERR("SCpnt is NULL"); | |
2430 | return; | |
2431 | } | |
2432 | ||
2433 | /* | |
2434 | * If a bus reset is in progress and there was an error, don't | |
2435 | * complete the command, just let it get retried at the end of the | |
2436 | * bus reset. | |
2437 | */ | |
a237f35f SR |
2438 | if (!hpsb_node_entry_valid(scsi_id->ne) |
2439 | && (scsi_status != SBP2_SCSI_STATUS_GOOD)) { | |
1da177e4 LT |
2440 | SBP2_ERR("Bus reset in progress - retry command later"); |
2441 | return; | |
2442 | } | |
a237f35f | 2443 | |
1da177e4 LT |
2444 | /* |
2445 | * Switch on scsi status | |
2446 | */ | |
2447 | switch (scsi_status) { | |
a237f35f | 2448 | case SBP2_SCSI_STATUS_GOOD: |
8f0525ff | 2449 | SCpnt->result = DID_OK << 16; |
a237f35f | 2450 | break; |
1da177e4 | 2451 | |
a237f35f SR |
2452 | case SBP2_SCSI_STATUS_BUSY: |
2453 | SBP2_ERR("SBP2_SCSI_STATUS_BUSY"); | |
2454 | SCpnt->result = DID_BUS_BUSY << 16; | |
2455 | break; | |
1da177e4 | 2456 | |
a237f35f SR |
2457 | case SBP2_SCSI_STATUS_CHECK_CONDITION: |
2458 | SBP2_DEBUG("SBP2_SCSI_STATUS_CHECK_CONDITION"); | |
8f0525ff | 2459 | SCpnt->result = CHECK_CONDITION << 1 | DID_OK << 16; |
1da177e4 | 2460 | #if CONFIG_IEEE1394_SBP2_DEBUG >= 1 |
a237f35f | 2461 | scsi_print_command(SCpnt); |
d024ebc6 | 2462 | scsi_print_sense(SBP2_DEVICE_NAME, SCpnt); |
1da177e4 | 2463 | #endif |
a237f35f | 2464 | break; |
1da177e4 | 2465 | |
a237f35f SR |
2466 | case SBP2_SCSI_STATUS_SELECTION_TIMEOUT: |
2467 | SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT"); | |
2468 | SCpnt->result = DID_NO_CONNECT << 16; | |
2469 | scsi_print_command(SCpnt); | |
2470 | break; | |
1da177e4 | 2471 | |
a237f35f SR |
2472 | case SBP2_SCSI_STATUS_CONDITION_MET: |
2473 | case SBP2_SCSI_STATUS_RESERVATION_CONFLICT: | |
2474 | case SBP2_SCSI_STATUS_COMMAND_TERMINATED: | |
2475 | SBP2_ERR("Bad SCSI status = %x", scsi_status); | |
2476 | SCpnt->result = DID_ERROR << 16; | |
2477 | scsi_print_command(SCpnt); | |
2478 | break; | |
1da177e4 | 2479 | |
a237f35f SR |
2480 | default: |
2481 | SBP2_ERR("Unsupported SCSI status = %x", scsi_status); | |
2482 | SCpnt->result = DID_ERROR << 16; | |
1da177e4 LT |
2483 | } |
2484 | ||
1da177e4 LT |
2485 | /* |
2486 | * If a bus reset is in progress and there was an error, complete | |
2487 | * the command as busy so that it will get retried. | |
2488 | */ | |
a237f35f SR |
2489 | if (!hpsb_node_entry_valid(scsi_id->ne) |
2490 | && (scsi_status != SBP2_SCSI_STATUS_GOOD)) { | |
1da177e4 LT |
2491 | SBP2_ERR("Completing command with busy (bus reset)"); |
2492 | SCpnt->result = DID_BUS_BUSY << 16; | |
2493 | } | |
2494 | ||
2495 | /* | |
2496 | * If a unit attention occurs, return busy status so it gets | |
2497 | * retried... it could have happened because of a 1394 bus reset | |
2498 | * or hot-plug... | |
8f0525ff SR |
2499 | * XXX DID_BUS_BUSY is actually a bad idea because it will defy |
2500 | * the scsi layer's retry logic. | |
1da177e4 LT |
2501 | */ |
2502 | #if 0 | |
2503 | if ((scsi_status == SBP2_SCSI_STATUS_CHECK_CONDITION) && | |
2504 | (SCpnt->sense_buffer[2] == UNIT_ATTENTION)) { | |
2505 | SBP2_DEBUG("UNIT ATTENTION - return busy"); | |
2506 | SCpnt->result = DID_BUS_BUSY << 16; | |
2507 | } | |
2508 | #endif | |
2509 | ||
2510 | /* | |
2511 | * Tell scsi stack that we're done with this command | |
2512 | */ | |
a237f35f | 2513 | done(SCpnt); |
1da177e4 LT |
2514 | } |
2515 | ||
abd559b1 | 2516 | static int sbp2scsi_slave_alloc(struct scsi_device *sdev) |
1da177e4 | 2517 | { |
a80614d1 SR |
2518 | struct scsi_id_instance_data *scsi_id = |
2519 | (struct scsi_id_instance_data *)sdev->host->hostdata[0]; | |
2520 | ||
2521 | scsi_id->sdev = sdev; | |
c394f1ea | 2522 | sdev->allow_restart = 1; |
a80614d1 | 2523 | |
24d3bf88 | 2524 | if (scsi_id->workarounds & SBP2_WORKAROUND_INQUIRY_36) |
a80614d1 | 2525 | sdev->inquiry_len = 36; |
abd559b1 JM |
2526 | return 0; |
2527 | } | |
2528 | ||
abd559b1 JM |
2529 | static int sbp2scsi_slave_configure(struct scsi_device *sdev) |
2530 | { | |
24d3bf88 SR |
2531 | struct scsi_id_instance_data *scsi_id = |
2532 | (struct scsi_id_instance_data *)sdev->host->hostdata[0]; | |
2533 | ||
abd559b1 | 2534 | blk_queue_dma_alignment(sdev->request_queue, (512 - 1)); |
365c786f | 2535 | sdev->use_10_for_rw = 1; |
24d3bf88 SR |
2536 | |
2537 | if (sdev->type == TYPE_DISK && | |
2538 | scsi_id->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) | |
2539 | sdev->skip_ms_page_8 = 1; | |
e9a1c52c SR |
2540 | if (scsi_id->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) |
2541 | sdev->fix_capacity = 1; | |
1da177e4 LT |
2542 | return 0; |
2543 | } | |
2544 | ||
abd559b1 JM |
2545 | static void sbp2scsi_slave_destroy(struct scsi_device *sdev) |
2546 | { | |
2547 | ((struct scsi_id_instance_data *)sdev->host->hostdata[0])->sdev = NULL; | |
2548 | return; | |
2549 | } | |
2550 | ||
1da177e4 LT |
2551 | /* |
2552 | * Called by scsi stack when something has really gone wrong. Usually | |
2553 | * called when a command has timed-out for some reason. | |
2554 | */ | |
2555 | static int sbp2scsi_abort(struct scsi_cmnd *SCpnt) | |
2556 | { | |
2557 | struct scsi_id_instance_data *scsi_id = | |
2558 | (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; | |
2559 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
2560 | struct sbp2_command_info *command; | |
24c7cd06 | 2561 | unsigned long flags; |
1da177e4 LT |
2562 | |
2563 | SBP2_ERR("aborting sbp2 command"); | |
2564 | scsi_print_command(SCpnt); | |
2565 | ||
abd559b1 | 2566 | if (sbp2util_node_is_available(scsi_id)) { |
1da177e4 LT |
2567 | |
2568 | /* | |
2569 | * Right now, just return any matching command structures | |
2570 | * to the free pool. | |
2571 | */ | |
24c7cd06 | 2572 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2573 | command = sbp2util_find_command_for_SCpnt(scsi_id, SCpnt); |
2574 | if (command) { | |
2575 | SBP2_DEBUG("Found command to abort"); | |
2576 | pci_dma_sync_single_for_cpu(hi->host->pdev, | |
2577 | command->command_orb_dma, | |
2578 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 2579 | PCI_DMA_TODEVICE); |
1da177e4 LT |
2580 | pci_dma_sync_single_for_cpu(hi->host->pdev, |
2581 | command->sge_dma, | |
2582 | sizeof(command->scatter_gather_element), | |
2583 | PCI_DMA_BIDIRECTIONAL); | |
2584 | sbp2util_mark_command_completed(scsi_id, command); | |
2585 | if (command->Current_SCpnt) { | |
2586 | command->Current_SCpnt->result = DID_ABORT << 16; | |
2587 | command->Current_done(command->Current_SCpnt); | |
2588 | } | |
2589 | } | |
24c7cd06 | 2590 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2591 | |
2592 | /* | |
2593 | * Initiate a fetch agent reset. | |
2594 | */ | |
1f427e80 | 2595 | sbp2_agent_reset(scsi_id, 1); |
1da177e4 LT |
2596 | sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY); |
2597 | } | |
2598 | ||
a237f35f | 2599 | return SUCCESS; |
1da177e4 LT |
2600 | } |
2601 | ||
2602 | /* | |
2603 | * Called by scsi stack when something has really gone wrong. | |
2604 | */ | |
abd559b1 | 2605 | static int sbp2scsi_reset(struct scsi_cmnd *SCpnt) |
1da177e4 LT |
2606 | { |
2607 | struct scsi_id_instance_data *scsi_id = | |
2608 | (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; | |
2609 | ||
2610 | SBP2_ERR("reset requested"); | |
2611 | ||
abd559b1 | 2612 | if (sbp2util_node_is_available(scsi_id)) { |
1da177e4 | 2613 | SBP2_ERR("Generating sbp2 fetch agent reset"); |
1f427e80 | 2614 | sbp2_agent_reset(scsi_id, 1); |
1da177e4 LT |
2615 | } |
2616 | ||
abd559b1 | 2617 | return SUCCESS; |
94d0e7b8 JG |
2618 | } |
2619 | ||
a237f35f SR |
2620 | static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev, |
2621 | struct device_attribute *attr, | |
2622 | char *buf) | |
1da177e4 LT |
2623 | { |
2624 | struct scsi_device *sdev; | |
2625 | struct scsi_id_instance_data *scsi_id; | |
2626 | int lun; | |
2627 | ||
2628 | if (!(sdev = to_scsi_device(dev))) | |
2629 | return 0; | |
2630 | ||
2631 | if (!(scsi_id = (struct scsi_id_instance_data *)sdev->host->hostdata[0])) | |
2632 | return 0; | |
2633 | ||
e309fc6d | 2634 | lun = ORB_SET_LUN(scsi_id->sbp2_lun); |
1da177e4 LT |
2635 | |
2636 | return sprintf(buf, "%016Lx:%d:%d\n", (unsigned long long)scsi_id->ne->guid, | |
2637 | scsi_id->ud->id, lun); | |
2638 | } | |
2639 | static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); | |
2640 | ||
2641 | static struct device_attribute *sbp2_sysfs_sdev_attrs[] = { | |
2642 | &dev_attr_ieee1394_id, | |
2643 | NULL | |
2644 | }; | |
2645 | ||
2646 | MODULE_AUTHOR("Ben Collins <bcollins@debian.org>"); | |
2647 | MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver"); | |
2648 | MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME); | |
2649 | MODULE_LICENSE("GPL"); | |
2650 | ||
2651 | /* SCSI host template */ | |
2652 | static struct scsi_host_template scsi_driver_template = { | |
2653 | .module = THIS_MODULE, | |
2654 | .name = "SBP-2 IEEE-1394", | |
2655 | .proc_name = SBP2_DEVICE_NAME, | |
1da177e4 LT |
2656 | .queuecommand = sbp2scsi_queuecommand, |
2657 | .eh_abort_handler = sbp2scsi_abort, | |
2658 | .eh_device_reset_handler = sbp2scsi_reset, | |
abd559b1 | 2659 | .slave_alloc = sbp2scsi_slave_alloc, |
1da177e4 | 2660 | .slave_configure = sbp2scsi_slave_configure, |
abd559b1 | 2661 | .slave_destroy = sbp2scsi_slave_destroy, |
1da177e4 LT |
2662 | .this_id = -1, |
2663 | .sg_tablesize = SG_ALL, | |
2664 | .use_clustering = ENABLE_CLUSTERING, | |
2665 | .cmd_per_lun = SBP2_MAX_CMDS, | |
2666 | .can_queue = SBP2_MAX_CMDS, | |
2667 | .emulated = 1, | |
2668 | .sdev_attrs = sbp2_sysfs_sdev_attrs, | |
2669 | }; | |
2670 | ||
2671 | static int sbp2_module_init(void) | |
2672 | { | |
2673 | int ret; | |
2674 | ||
d024ebc6 | 2675 | SBP2_DEBUG_ENTER(); |
1da177e4 | 2676 | |
1da177e4 LT |
2677 | /* Module load debug option to force one command at a time (serializing I/O) */ |
2678 | if (serialize_io) { | |
2bab359a JM |
2679 | SBP2_INFO("Driver forced to serialize I/O (serialize_io=1)"); |
2680 | SBP2_INFO("Try serialize_io=0 for better performance"); | |
1da177e4 LT |
2681 | scsi_driver_template.can_queue = 1; |
2682 | scsi_driver_template.cmd_per_lun = 1; | |
2683 | } | |
2684 | ||
24d3bf88 SR |
2685 | if (sbp2_default_workarounds & SBP2_WORKAROUND_128K_MAX_TRANS && |
2686 | (max_sectors * 512) > (128 * 1024)) | |
2687 | max_sectors = 128 * 1024 / 512; | |
1da177e4 LT |
2688 | scsi_driver_template.max_sectors = max_sectors; |
2689 | ||
1da177e4 LT |
2690 | /* Register our high level driver with 1394 stack */ |
2691 | hpsb_register_highlevel(&sbp2_highlevel); | |
2692 | ||
2693 | ret = hpsb_register_protocol(&sbp2_driver); | |
2694 | if (ret) { | |
2695 | SBP2_ERR("Failed to register protocol"); | |
2696 | hpsb_unregister_highlevel(&sbp2_highlevel); | |
2697 | return ret; | |
2698 | } | |
2699 | ||
2700 | return 0; | |
2701 | } | |
2702 | ||
2703 | static void __exit sbp2_module_exit(void) | |
2704 | { | |
d024ebc6 | 2705 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
2706 | |
2707 | hpsb_unregister_protocol(&sbp2_driver); | |
2708 | ||
2709 | hpsb_unregister_highlevel(&sbp2_highlevel); | |
2710 | } | |
2711 | ||
2712 | module_init(sbp2_module_init); | |
2713 | module_exit(sbp2_module_exit); |