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 | ||
496 | static void sbp2util_write_orb_pointer(void *p) | |
497 | { | |
498 | quadlet_t data[2]; | |
499 | ||
500 | data[0] = ORB_SET_NODE_ID( | |
501 | ((struct scsi_id_instance_data *)p)->hi->host->node_id); | |
502 | data[1] = ((struct scsi_id_instance_data *)p)->last_orb_dma; | |
503 | sbp2util_cpu_to_be32_buffer(data, 8); | |
504 | sbp2util_notify_fetch_agent(p, SBP2_ORB_POINTER_OFFSET, data, 8); | |
505 | } | |
506 | ||
507 | static void sbp2util_write_doorbell(void *p) | |
508 | { | |
509 | sbp2util_notify_fetch_agent(p, SBP2_DOORBELL_OFFSET, NULL, 4); | |
510 | } | |
511 | ||
1da177e4 LT |
512 | /* |
513 | * This function is called to create a pool of command orbs used for | |
514 | * command processing. It is called when a new sbp2 device is detected. | |
515 | */ | |
516 | static int sbp2util_create_command_orb_pool(struct scsi_id_instance_data *scsi_id) | |
517 | { | |
518 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
519 | int i; | |
520 | unsigned long flags, orbs; | |
521 | struct sbp2_command_info *command; | |
522 | ||
523 | orbs = serialize_io ? 2 : SBP2_MAX_CMDS; | |
524 | ||
525 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
526 | for (i = 0; i < orbs; i++) { | |
8551158a | 527 | command = kzalloc(sizeof(*command), GFP_ATOMIC); |
1da177e4 | 528 | if (!command) { |
a237f35f SR |
529 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, |
530 | flags); | |
531 | return -ENOMEM; | |
1da177e4 | 532 | } |
1da177e4 | 533 | command->command_orb_dma = |
a237f35f SR |
534 | pci_map_single(hi->host->pdev, &command->command_orb, |
535 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 536 | PCI_DMA_TODEVICE); |
1da177e4 LT |
537 | SBP2_DMA_ALLOC("single command orb DMA"); |
538 | command->sge_dma = | |
a237f35f SR |
539 | pci_map_single(hi->host->pdev, |
540 | &command->scatter_gather_element, | |
541 | sizeof(command->scatter_gather_element), | |
542 | PCI_DMA_BIDIRECTIONAL); | |
1da177e4 LT |
543 | SBP2_DMA_ALLOC("scatter_gather_element"); |
544 | INIT_LIST_HEAD(&command->list); | |
545 | list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed); | |
546 | } | |
547 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
548 | return 0; | |
549 | } | |
550 | ||
551 | /* | |
552 | * This function is called to delete a pool of command orbs. | |
553 | */ | |
554 | static void sbp2util_remove_command_orb_pool(struct scsi_id_instance_data *scsi_id) | |
555 | { | |
556 | struct hpsb_host *host = scsi_id->hi->host; | |
557 | struct list_head *lh, *next; | |
558 | struct sbp2_command_info *command; | |
559 | unsigned long flags; | |
560 | ||
561 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
562 | if (!list_empty(&scsi_id->sbp2_command_orb_completed)) { | |
563 | list_for_each_safe(lh, next, &scsi_id->sbp2_command_orb_completed) { | |
564 | command = list_entry(lh, struct sbp2_command_info, list); | |
565 | ||
566 | /* Release our generic DMA's */ | |
567 | pci_unmap_single(host->pdev, command->command_orb_dma, | |
568 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 569 | PCI_DMA_TODEVICE); |
1da177e4 LT |
570 | SBP2_DMA_FREE("single command orb DMA"); |
571 | pci_unmap_single(host->pdev, command->sge_dma, | |
572 | sizeof(command->scatter_gather_element), | |
573 | PCI_DMA_BIDIRECTIONAL); | |
574 | SBP2_DMA_FREE("scatter_gather_element"); | |
575 | ||
576 | kfree(command); | |
577 | } | |
578 | } | |
579 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
580 | return; | |
581 | } | |
582 | ||
583 | /* | |
584 | * This function finds the sbp2_command for a given outstanding command | |
585 | * orb.Only looks at the inuse list. | |
586 | */ | |
587 | static struct sbp2_command_info *sbp2util_find_command_for_orb( | |
588 | struct scsi_id_instance_data *scsi_id, dma_addr_t orb) | |
589 | { | |
590 | struct sbp2_command_info *command; | |
591 | unsigned long flags; | |
592 | ||
593 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
594 | if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) { | |
595 | list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) { | |
596 | if (command->command_orb_dma == orb) { | |
597 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
a237f35f | 598 | return command; |
1da177e4 LT |
599 | } |
600 | } | |
601 | } | |
602 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
603 | ||
604 | SBP2_ORB_DEBUG("could not match command orb %x", (unsigned int)orb); | |
605 | ||
a237f35f | 606 | return NULL; |
1da177e4 LT |
607 | } |
608 | ||
609 | /* | |
610 | * This function finds the sbp2_command for a given outstanding SCpnt. | |
611 | * Only looks at the inuse list. | |
24c7cd06 | 612 | * Must be called with scsi_id->sbp2_command_orb_lock held. |
1da177e4 | 613 | */ |
24c7cd06 SR |
614 | static struct sbp2_command_info *sbp2util_find_command_for_SCpnt( |
615 | struct scsi_id_instance_data *scsi_id, void *SCpnt) | |
1da177e4 LT |
616 | { |
617 | struct sbp2_command_info *command; | |
1da177e4 | 618 | |
24c7cd06 SR |
619 | if (!list_empty(&scsi_id->sbp2_command_orb_inuse)) |
620 | list_for_each_entry(command, &scsi_id->sbp2_command_orb_inuse, list) | |
621 | if (command->Current_SCpnt == SCpnt) | |
a237f35f | 622 | return command; |
a237f35f | 623 | return NULL; |
1da177e4 LT |
624 | } |
625 | ||
626 | /* | |
627 | * This function allocates a command orb used to send a scsi command. | |
628 | */ | |
629 | static struct sbp2_command_info *sbp2util_allocate_command_orb( | |
630 | struct scsi_id_instance_data *scsi_id, | |
631 | struct scsi_cmnd *Current_SCpnt, | |
632 | void (*Current_done)(struct scsi_cmnd *)) | |
633 | { | |
634 | struct list_head *lh; | |
635 | struct sbp2_command_info *command = NULL; | |
636 | unsigned long flags; | |
637 | ||
638 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); | |
639 | if (!list_empty(&scsi_id->sbp2_command_orb_completed)) { | |
640 | lh = scsi_id->sbp2_command_orb_completed.next; | |
641 | list_del(lh); | |
642 | command = list_entry(lh, struct sbp2_command_info, list); | |
643 | command->Current_done = Current_done; | |
644 | command->Current_SCpnt = Current_SCpnt; | |
645 | list_add_tail(&command->list, &scsi_id->sbp2_command_orb_inuse); | |
646 | } else { | |
d024ebc6 | 647 | SBP2_ERR("%s: no orbs available", __FUNCTION__); |
1da177e4 LT |
648 | } |
649 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
a237f35f | 650 | return command; |
1da177e4 LT |
651 | } |
652 | ||
653 | /* Free our DMA's */ | |
654 | static void sbp2util_free_command_dma(struct sbp2_command_info *command) | |
655 | { | |
656 | struct scsi_id_instance_data *scsi_id = | |
657 | (struct scsi_id_instance_data *)command->Current_SCpnt->device->host->hostdata[0]; | |
658 | struct hpsb_host *host; | |
659 | ||
660 | if (!scsi_id) { | |
d024ebc6 | 661 | SBP2_ERR("%s: scsi_id == NULL", __FUNCTION__); |
1da177e4 LT |
662 | return; |
663 | } | |
664 | ||
665 | host = scsi_id->ud->ne->host; | |
666 | ||
667 | if (command->cmd_dma) { | |
668 | if (command->dma_type == CMD_DMA_SINGLE) { | |
669 | pci_unmap_single(host->pdev, command->cmd_dma, | |
670 | command->dma_size, command->dma_dir); | |
671 | SBP2_DMA_FREE("single bulk"); | |
672 | } else if (command->dma_type == CMD_DMA_PAGE) { | |
673 | pci_unmap_page(host->pdev, command->cmd_dma, | |
674 | command->dma_size, command->dma_dir); | |
675 | SBP2_DMA_FREE("single page"); | |
676 | } /* XXX: Check for CMD_DMA_NONE bug */ | |
677 | command->dma_type = CMD_DMA_NONE; | |
678 | command->cmd_dma = 0; | |
679 | } | |
680 | ||
681 | if (command->sge_buffer) { | |
682 | pci_unmap_sg(host->pdev, command->sge_buffer, | |
683 | command->dma_size, command->dma_dir); | |
684 | SBP2_DMA_FREE("scatter list"); | |
685 | command->sge_buffer = NULL; | |
686 | } | |
687 | } | |
688 | ||
689 | /* | |
690 | * This function moves a command to the completed orb list. | |
24c7cd06 | 691 | * Must be called with scsi_id->sbp2_command_orb_lock held. |
1da177e4 | 692 | */ |
24c7cd06 SR |
693 | static void sbp2util_mark_command_completed( |
694 | struct scsi_id_instance_data *scsi_id, | |
695 | struct sbp2_command_info *command) | |
1da177e4 | 696 | { |
1da177e4 LT |
697 | list_del(&command->list); |
698 | sbp2util_free_command_dma(command); | |
699 | list_add_tail(&command->list, &scsi_id->sbp2_command_orb_completed); | |
1da177e4 LT |
700 | } |
701 | ||
abd559b1 JM |
702 | /* |
703 | * Is scsi_id valid? Is the 1394 node still present? | |
704 | */ | |
705 | static inline int sbp2util_node_is_available(struct scsi_id_instance_data *scsi_id) | |
706 | { | |
707 | return scsi_id && scsi_id->ne && !scsi_id->ne->in_limbo; | |
708 | } | |
709 | ||
1da177e4 LT |
710 | /********************************************* |
711 | * IEEE-1394 core driver stack related section | |
712 | *********************************************/ | |
713 | static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud); | |
714 | ||
715 | static int sbp2_probe(struct device *dev) | |
716 | { | |
717 | struct unit_directory *ud; | |
718 | struct scsi_id_instance_data *scsi_id; | |
719 | ||
d024ebc6 | 720 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
721 | |
722 | ud = container_of(dev, struct unit_directory, device); | |
723 | ||
724 | /* Don't probe UD's that have the LUN flag. We'll probe the LUN(s) | |
725 | * instead. */ | |
726 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN_DIRECTORY) | |
727 | return -ENODEV; | |
728 | ||
a237f35f | 729 | scsi_id = sbp2_alloc_device(ud); |
1da177e4 | 730 | |
a237f35f SR |
731 | if (!scsi_id) |
732 | return -ENOMEM; | |
1da177e4 | 733 | |
a237f35f | 734 | sbp2_parse_unit_directory(scsi_id, ud); |
1da177e4 | 735 | |
a237f35f | 736 | return sbp2_start_device(scsi_id); |
1da177e4 LT |
737 | } |
738 | ||
739 | static int sbp2_remove(struct device *dev) | |
740 | { | |
741 | struct unit_directory *ud; | |
742 | struct scsi_id_instance_data *scsi_id; | |
abd559b1 | 743 | struct scsi_device *sdev; |
1da177e4 | 744 | |
d024ebc6 | 745 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
746 | |
747 | ud = container_of(dev, struct unit_directory, device); | |
748 | scsi_id = ud->device.driver_data; | |
abd559b1 JM |
749 | if (!scsi_id) |
750 | return 0; | |
751 | ||
bf637ec3 SR |
752 | if (scsi_id->scsi_host) { |
753 | /* Get rid of enqueued commands if there is no chance to | |
754 | * send them. */ | |
755 | if (!sbp2util_node_is_available(scsi_id)) | |
756 | sbp2scsi_complete_all_commands(scsi_id, DID_NO_CONNECT); | |
757 | /* scsi_remove_device() will trigger shutdown functions of SCSI | |
758 | * highlevel drivers which would deadlock if blocked. */ | |
2cccbb55 | 759 | atomic_set(&scsi_id->state, SBP2LU_STATE_IN_SHUTDOWN); |
abd559b1 | 760 | scsi_unblock_requests(scsi_id->scsi_host); |
bf637ec3 | 761 | } |
abd559b1 JM |
762 | sdev = scsi_id->sdev; |
763 | if (sdev) { | |
764 | scsi_id->sdev = NULL; | |
765 | scsi_remove_device(sdev); | |
766 | } | |
1da177e4 LT |
767 | |
768 | sbp2_logout_device(scsi_id); | |
769 | sbp2_remove_device(scsi_id); | |
770 | ||
771 | return 0; | |
772 | } | |
773 | ||
774 | static int sbp2_update(struct unit_directory *ud) | |
775 | { | |
776 | struct scsi_id_instance_data *scsi_id = ud->device.driver_data; | |
777 | ||
d024ebc6 | 778 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
779 | |
780 | if (sbp2_reconnect_device(scsi_id)) { | |
781 | ||
782 | /* | |
783 | * Ok, reconnect has failed. Perhaps we didn't | |
784 | * reconnect fast enough. Try doing a regular login, but | |
785 | * first do a logout just in case of any weirdness. | |
786 | */ | |
787 | sbp2_logout_device(scsi_id); | |
788 | ||
789 | if (sbp2_login_device(scsi_id)) { | |
790 | /* Login failed too, just fail, and the backend | |
791 | * will call our sbp2_remove for us */ | |
792 | SBP2_ERR("Failed to reconnect to sbp2 device!"); | |
793 | return -EBUSY; | |
794 | } | |
795 | } | |
796 | ||
797 | /* Set max retries to something large on the device. */ | |
798 | sbp2_set_busy_timeout(scsi_id); | |
799 | ||
800 | /* Do a SBP-2 fetch agent reset. */ | |
801 | sbp2_agent_reset(scsi_id, 1); | |
802 | ||
803 | /* Get the max speed and packet size that we can use. */ | |
804 | sbp2_max_speed_and_size(scsi_id); | |
805 | ||
806 | /* Complete any pending commands with busy (so they get | |
807 | * retried) and remove them from our queue | |
808 | */ | |
809 | sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY); | |
810 | ||
4fc383c0 SR |
811 | /* Accept new commands unless there was another bus reset in the |
812 | * meantime. */ | |
813 | if (hpsb_node_entry_valid(scsi_id->ne)) { | |
2cccbb55 | 814 | atomic_set(&scsi_id->state, SBP2LU_STATE_RUNNING); |
4fc383c0 SR |
815 | scsi_unblock_requests(scsi_id->scsi_host); |
816 | } | |
1da177e4 LT |
817 | return 0; |
818 | } | |
819 | ||
820 | /* This functions is called by the sbp2_probe, for each new device. We now | |
821 | * allocate one scsi host for each scsi_id (unit directory). */ | |
822 | static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud) | |
823 | { | |
824 | struct sbp2scsi_host_info *hi; | |
825 | struct Scsi_Host *scsi_host = NULL; | |
826 | struct scsi_id_instance_data *scsi_id = NULL; | |
827 | ||
d024ebc6 | 828 | SBP2_DEBUG_ENTER(); |
1da177e4 | 829 | |
8551158a | 830 | scsi_id = kzalloc(sizeof(*scsi_id), GFP_KERNEL); |
1da177e4 LT |
831 | if (!scsi_id) { |
832 | SBP2_ERR("failed to create scsi_id"); | |
833 | goto failed_alloc; | |
834 | } | |
1da177e4 LT |
835 | |
836 | scsi_id->ne = ud->ne; | |
837 | scsi_id->ud = ud; | |
838 | scsi_id->speed_code = IEEE1394_SPEED_100; | |
839 | scsi_id->max_payload_size = sbp2_speedto_max_payload[IEEE1394_SPEED_100]; | |
6737231e | 840 | scsi_id->status_fifo_addr = CSR1212_INVALID_ADDR_SPACE; |
1da177e4 LT |
841 | INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_inuse); |
842 | INIT_LIST_HEAD(&scsi_id->sbp2_command_orb_completed); | |
843 | INIT_LIST_HEAD(&scsi_id->scsi_list); | |
844 | spin_lock_init(&scsi_id->sbp2_command_orb_lock); | |
2cccbb55 | 845 | atomic_set(&scsi_id->state, SBP2LU_STATE_RUNNING); |
09ee67ab | 846 | INIT_WORK(&scsi_id->protocol_work, NULL, NULL); |
1da177e4 LT |
847 | |
848 | ud->device.driver_data = scsi_id; | |
849 | ||
850 | hi = hpsb_get_hostinfo(&sbp2_highlevel, ud->ne->host); | |
851 | if (!hi) { | |
852 | hi = hpsb_create_hostinfo(&sbp2_highlevel, ud->ne->host, sizeof(*hi)); | |
853 | if (!hi) { | |
854 | SBP2_ERR("failed to allocate hostinfo"); | |
855 | goto failed_alloc; | |
856 | } | |
857 | SBP2_DEBUG("sbp2_alloc_device: allocated hostinfo"); | |
858 | hi->host = ud->ne->host; | |
859 | INIT_LIST_HEAD(&hi->scsi_ids); | |
860 | ||
1da177e4 LT |
861 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA |
862 | /* Handle data movement if physical dma is not | |
55664051 SR |
863 | * enabled or not supported on host controller */ |
864 | if (!hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, | |
865 | &sbp2_physdma_ops, | |
866 | 0x0ULL, 0xfffffffcULL)) { | |
867 | SBP2_ERR("failed to register lower 4GB address range"); | |
868 | goto failed_alloc; | |
869 | } | |
1da177e4 LT |
870 | #endif |
871 | } | |
872 | ||
147830f2 SR |
873 | /* Prevent unloading of the 1394 host */ |
874 | if (!try_module_get(hi->host->driver->owner)) { | |
875 | SBP2_ERR("failed to get a reference on 1394 host driver"); | |
876 | goto failed_alloc; | |
877 | } | |
878 | ||
1da177e4 LT |
879 | scsi_id->hi = hi; |
880 | ||
881 | list_add_tail(&scsi_id->scsi_list, &hi->scsi_ids); | |
882 | ||
35bdddb8 SR |
883 | /* Register the status FIFO address range. We could use the same FIFO |
884 | * for targets at different nodes. However we need different FIFOs per | |
a54c9d30 SR |
885 | * target in order to support multi-unit devices. |
886 | * The FIFO is located out of the local host controller's physical range | |
887 | * but, if possible, within the posted write area. Status writes will | |
888 | * then be performed as unified transactions. This slightly reduces | |
889 | * bandwidth usage, and some Prolific based devices seem to require it. | |
890 | */ | |
35bdddb8 SR |
891 | scsi_id->status_fifo_addr = hpsb_allocate_and_register_addrspace( |
892 | &sbp2_highlevel, ud->ne->host, &sbp2_ops, | |
893 | sizeof(struct sbp2_status_block), sizeof(quadlet_t), | |
40ae6c5e | 894 | ud->ne->host->low_addr_space, CSR1212_ALL_SPACE_END); |
6737231e | 895 | if (scsi_id->status_fifo_addr == CSR1212_INVALID_ADDR_SPACE) { |
35bdddb8 SR |
896 | SBP2_ERR("failed to allocate status FIFO address range"); |
897 | goto failed_alloc; | |
898 | } | |
899 | ||
1da177e4 | 900 | /* Register our host with the SCSI stack. */ |
a2ef79e1 | 901 | scsi_host = scsi_host_alloc(&scsi_driver_template, |
a237f35f | 902 | sizeof(unsigned long)); |
1da177e4 LT |
903 | if (!scsi_host) { |
904 | SBP2_ERR("failed to register scsi host"); | |
905 | goto failed_alloc; | |
906 | } | |
907 | ||
908 | scsi_host->hostdata[0] = (unsigned long)scsi_id; | |
909 | ||
910 | if (!scsi_add_host(scsi_host, &ud->device)) { | |
911 | scsi_id->scsi_host = scsi_host; | |
912 | return scsi_id; | |
913 | } | |
914 | ||
915 | SBP2_ERR("failed to add scsi host"); | |
916 | scsi_host_put(scsi_host); | |
917 | ||
918 | failed_alloc: | |
919 | sbp2_remove_device(scsi_id); | |
920 | return NULL; | |
921 | } | |
922 | ||
1da177e4 LT |
923 | static void sbp2_host_reset(struct hpsb_host *host) |
924 | { | |
925 | struct sbp2scsi_host_info *hi; | |
926 | struct scsi_id_instance_data *scsi_id; | |
927 | ||
928 | hi = hpsb_get_hostinfo(&sbp2_highlevel, host); | |
2cccbb55 SR |
929 | if (!hi) |
930 | return; | |
931 | list_for_each_entry(scsi_id, &hi->scsi_ids, scsi_list) | |
932 | if (likely(atomic_read(&scsi_id->state) != | |
933 | SBP2LU_STATE_IN_SHUTDOWN)) { | |
934 | atomic_set(&scsi_id->state, SBP2LU_STATE_IN_RESET); | |
1da177e4 | 935 | scsi_block_requests(scsi_id->scsi_host); |
09ee67ab | 936 | } |
1da177e4 LT |
937 | } |
938 | ||
1da177e4 LT |
939 | /* |
940 | * This function is where we first pull the node unique ids, and then | |
941 | * allocate memory and register a SBP-2 device. | |
942 | */ | |
943 | static int sbp2_start_device(struct scsi_id_instance_data *scsi_id) | |
944 | { | |
945 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
146f7262 | 946 | int error; |
1da177e4 | 947 | |
d024ebc6 | 948 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
949 | |
950 | /* Login FIFO DMA */ | |
951 | scsi_id->login_response = | |
a237f35f SR |
952 | pci_alloc_consistent(hi->host->pdev, |
953 | sizeof(struct sbp2_login_response), | |
1da177e4 LT |
954 | &scsi_id->login_response_dma); |
955 | if (!scsi_id->login_response) | |
956 | goto alloc_fail; | |
957 | SBP2_DMA_ALLOC("consistent DMA region for login FIFO"); | |
958 | ||
959 | /* Query logins ORB DMA */ | |
960 | scsi_id->query_logins_orb = | |
a237f35f SR |
961 | pci_alloc_consistent(hi->host->pdev, |
962 | sizeof(struct sbp2_query_logins_orb), | |
1da177e4 LT |
963 | &scsi_id->query_logins_orb_dma); |
964 | if (!scsi_id->query_logins_orb) | |
965 | goto alloc_fail; | |
966 | SBP2_DMA_ALLOC("consistent DMA region for query logins ORB"); | |
967 | ||
968 | /* Query logins response DMA */ | |
969 | scsi_id->query_logins_response = | |
a237f35f SR |
970 | pci_alloc_consistent(hi->host->pdev, |
971 | sizeof(struct sbp2_query_logins_response), | |
1da177e4 LT |
972 | &scsi_id->query_logins_response_dma); |
973 | if (!scsi_id->query_logins_response) | |
974 | goto alloc_fail; | |
975 | SBP2_DMA_ALLOC("consistent DMA region for query logins response"); | |
976 | ||
977 | /* Reconnect ORB DMA */ | |
978 | scsi_id->reconnect_orb = | |
a237f35f SR |
979 | pci_alloc_consistent(hi->host->pdev, |
980 | sizeof(struct sbp2_reconnect_orb), | |
1da177e4 LT |
981 | &scsi_id->reconnect_orb_dma); |
982 | if (!scsi_id->reconnect_orb) | |
983 | goto alloc_fail; | |
984 | SBP2_DMA_ALLOC("consistent DMA region for reconnect ORB"); | |
985 | ||
986 | /* Logout ORB DMA */ | |
987 | scsi_id->logout_orb = | |
a237f35f SR |
988 | pci_alloc_consistent(hi->host->pdev, |
989 | sizeof(struct sbp2_logout_orb), | |
1da177e4 LT |
990 | &scsi_id->logout_orb_dma); |
991 | if (!scsi_id->logout_orb) | |
992 | goto alloc_fail; | |
993 | SBP2_DMA_ALLOC("consistent DMA region for logout ORB"); | |
994 | ||
995 | /* Login ORB DMA */ | |
996 | scsi_id->login_orb = | |
a237f35f SR |
997 | pci_alloc_consistent(hi->host->pdev, |
998 | sizeof(struct sbp2_login_orb), | |
1da177e4 | 999 | &scsi_id->login_orb_dma); |
eaceec7f SR |
1000 | if (!scsi_id->login_orb) |
1001 | goto alloc_fail; | |
1da177e4 LT |
1002 | SBP2_DMA_ALLOC("consistent DMA region for login ORB"); |
1003 | ||
1004 | SBP2_DEBUG("New SBP-2 device inserted, SCSI ID = %x", scsi_id->ud->id); | |
1005 | ||
1006 | /* | |
1007 | * Create our command orb pool | |
1008 | */ | |
1009 | if (sbp2util_create_command_orb_pool(scsi_id)) { | |
1010 | SBP2_ERR("sbp2util_create_command_orb_pool failed!"); | |
1011 | sbp2_remove_device(scsi_id); | |
1012 | return -ENOMEM; | |
1013 | } | |
1014 | ||
1015 | /* Schedule a timeout here. The reason is that we may be so close | |
1016 | * to a bus reset, that the device is not available for logins. | |
1017 | * This can happen when the bus reset is caused by the host | |
1018 | * connected to the sbp2 device being removed. That host would | |
1019 | * have a certain amount of time to relogin before the sbp2 device | |
1020 | * allows someone else to login instead. One second makes sense. */ | |
902abed1 | 1021 | if (msleep_interruptible(1000)) { |
1da177e4 LT |
1022 | sbp2_remove_device(scsi_id); |
1023 | return -EINTR; | |
1024 | } | |
a237f35f | 1025 | |
1da177e4 LT |
1026 | /* |
1027 | * Login to the sbp-2 device | |
1028 | */ | |
1029 | if (sbp2_login_device(scsi_id)) { | |
1030 | /* Login failed, just remove the device. */ | |
1031 | sbp2_remove_device(scsi_id); | |
1032 | return -EBUSY; | |
1033 | } | |
1034 | ||
1035 | /* | |
1036 | * Set max retries to something large on the device | |
1037 | */ | |
1038 | sbp2_set_busy_timeout(scsi_id); | |
1039 | ||
1040 | /* | |
1041 | * Do a SBP-2 fetch agent reset | |
1042 | */ | |
1043 | sbp2_agent_reset(scsi_id, 1); | |
1044 | ||
1045 | /* | |
1046 | * Get the max speed and packet size that we can use | |
1047 | */ | |
1048 | sbp2_max_speed_and_size(scsi_id); | |
1049 | ||
1050 | /* Add this device to the scsi layer now */ | |
146f7262 JB |
1051 | error = scsi_add_device(scsi_id->scsi_host, 0, scsi_id->ud->id, 0); |
1052 | if (error) { | |
1da177e4 | 1053 | SBP2_ERR("scsi_add_device failed"); |
dc3edd54 SR |
1054 | sbp2_logout_device(scsi_id); |
1055 | sbp2_remove_device(scsi_id); | |
146f7262 | 1056 | return error; |
1da177e4 LT |
1057 | } |
1058 | ||
1059 | return 0; | |
eaceec7f SR |
1060 | |
1061 | alloc_fail: | |
1062 | SBP2_ERR("Could not allocate memory for scsi_id"); | |
1063 | sbp2_remove_device(scsi_id); | |
1064 | return -ENOMEM; | |
1da177e4 LT |
1065 | } |
1066 | ||
1067 | /* | |
1068 | * This function removes an sbp2 device from the sbp2scsi_host_info struct. | |
1069 | */ | |
1070 | static void sbp2_remove_device(struct scsi_id_instance_data *scsi_id) | |
1071 | { | |
1072 | struct sbp2scsi_host_info *hi; | |
1073 | ||
d024ebc6 | 1074 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
1075 | |
1076 | if (!scsi_id) | |
1077 | return; | |
1078 | ||
1079 | hi = scsi_id->hi; | |
1080 | ||
1081 | /* This will remove our scsi device aswell */ | |
1082 | if (scsi_id->scsi_host) { | |
1083 | scsi_remove_host(scsi_id->scsi_host); | |
1084 | scsi_host_put(scsi_id->scsi_host); | |
1085 | } | |
09ee67ab | 1086 | flush_scheduled_work(); |
1da177e4 LT |
1087 | sbp2util_remove_command_orb_pool(scsi_id); |
1088 | ||
1089 | list_del(&scsi_id->scsi_list); | |
1090 | ||
1091 | if (scsi_id->login_response) { | |
1092 | pci_free_consistent(hi->host->pdev, | |
1093 | sizeof(struct sbp2_login_response), | |
1094 | scsi_id->login_response, | |
1095 | scsi_id->login_response_dma); | |
1096 | SBP2_DMA_FREE("single login FIFO"); | |
1097 | } | |
1098 | ||
1099 | if (scsi_id->login_orb) { | |
1100 | pci_free_consistent(hi->host->pdev, | |
1101 | sizeof(struct sbp2_login_orb), | |
1102 | scsi_id->login_orb, | |
1103 | scsi_id->login_orb_dma); | |
1104 | SBP2_DMA_FREE("single login ORB"); | |
1105 | } | |
1106 | ||
1107 | if (scsi_id->reconnect_orb) { | |
1108 | pci_free_consistent(hi->host->pdev, | |
1109 | sizeof(struct sbp2_reconnect_orb), | |
1110 | scsi_id->reconnect_orb, | |
1111 | scsi_id->reconnect_orb_dma); | |
1112 | SBP2_DMA_FREE("single reconnect orb"); | |
1113 | } | |
1114 | ||
1115 | if (scsi_id->logout_orb) { | |
1116 | pci_free_consistent(hi->host->pdev, | |
1117 | sizeof(struct sbp2_logout_orb), | |
1118 | scsi_id->logout_orb, | |
1119 | scsi_id->logout_orb_dma); | |
1120 | SBP2_DMA_FREE("single logout orb"); | |
1121 | } | |
1122 | ||
1123 | if (scsi_id->query_logins_orb) { | |
1124 | pci_free_consistent(hi->host->pdev, | |
1125 | sizeof(struct sbp2_query_logins_orb), | |
1126 | scsi_id->query_logins_orb, | |
1127 | scsi_id->query_logins_orb_dma); | |
1128 | SBP2_DMA_FREE("single query logins orb"); | |
1129 | } | |
1130 | ||
1131 | if (scsi_id->query_logins_response) { | |
1132 | pci_free_consistent(hi->host->pdev, | |
1133 | sizeof(struct sbp2_query_logins_response), | |
1134 | scsi_id->query_logins_response, | |
1135 | scsi_id->query_logins_response_dma); | |
1136 | SBP2_DMA_FREE("single query logins data"); | |
1137 | } | |
1138 | ||
6737231e | 1139 | if (scsi_id->status_fifo_addr != CSR1212_INVALID_ADDR_SPACE) |
35bdddb8 | 1140 | hpsb_unregister_addrspace(&sbp2_highlevel, hi->host, |
6737231e | 1141 | scsi_id->status_fifo_addr); |
35bdddb8 | 1142 | |
1da177e4 LT |
1143 | scsi_id->ud->device.driver_data = NULL; |
1144 | ||
147830f2 SR |
1145 | if (hi) |
1146 | module_put(hi->host->driver->owner); | |
1147 | ||
1da177e4 LT |
1148 | SBP2_DEBUG("SBP-2 device removed, SCSI ID = %d", scsi_id->ud->id); |
1149 | ||
1150 | kfree(scsi_id); | |
1151 | } | |
1152 | ||
1153 | #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA | |
1154 | /* | |
1155 | * This function deals with physical dma write requests (for adapters that do not support | |
1156 | * physical dma in hardware). Mostly just here for debugging... | |
1157 | */ | |
a237f35f SR |
1158 | static int sbp2_handle_physdma_write(struct hpsb_host *host, int nodeid, |
1159 | int destid, quadlet_t *data, u64 addr, | |
1160 | size_t length, u16 flags) | |
1da177e4 LT |
1161 | { |
1162 | ||
a237f35f SR |
1163 | /* |
1164 | * Manually put the data in the right place. | |
1165 | */ | |
1166 | memcpy(bus_to_virt((u32) addr), data, length); | |
1167 | sbp2util_packet_dump(data, length, "sbp2 phys dma write by device", | |
1168 | (u32) addr); | |
1169 | return RCODE_COMPLETE; | |
1da177e4 LT |
1170 | } |
1171 | ||
1172 | /* | |
1173 | * This function deals with physical dma read requests (for adapters that do not support | |
1174 | * physical dma in hardware). Mostly just here for debugging... | |
1175 | */ | |
a237f35f SR |
1176 | static int sbp2_handle_physdma_read(struct hpsb_host *host, int nodeid, |
1177 | quadlet_t *data, u64 addr, size_t length, | |
1178 | u16 flags) | |
1da177e4 LT |
1179 | { |
1180 | ||
a237f35f SR |
1181 | /* |
1182 | * Grab data from memory and send a read response. | |
1183 | */ | |
1184 | memcpy(data, bus_to_virt((u32) addr), length); | |
1185 | sbp2util_packet_dump(data, length, "sbp2 phys dma read by device", | |
1186 | (u32) addr); | |
1187 | return RCODE_COMPLETE; | |
1da177e4 LT |
1188 | } |
1189 | #endif | |
1190 | ||
1da177e4 LT |
1191 | /************************************** |
1192 | * SBP-2 protocol related section | |
1193 | **************************************/ | |
1194 | ||
1da177e4 LT |
1195 | /* |
1196 | * This function queries the device for the maximum concurrent logins it | |
1197 | * supports. | |
1198 | */ | |
1199 | static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id) | |
1200 | { | |
1201 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1202 | quadlet_t data[2]; | |
1203 | int max_logins; | |
1204 | int active_logins; | |
1205 | ||
d024ebc6 | 1206 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
1207 | |
1208 | scsi_id->query_logins_orb->reserved1 = 0x0; | |
1209 | scsi_id->query_logins_orb->reserved2 = 0x0; | |
1210 | ||
1211 | scsi_id->query_logins_orb->query_response_lo = scsi_id->query_logins_response_dma; | |
1212 | scsi_id->query_logins_orb->query_response_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1da177e4 LT |
1213 | |
1214 | scsi_id->query_logins_orb->lun_misc = ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST); | |
1215 | scsi_id->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1); | |
e309fc6d | 1216 | scsi_id->query_logins_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_lun); |
1da177e4 LT |
1217 | |
1218 | scsi_id->query_logins_orb->reserved_resp_length = | |
1219 | ORB_SET_QUERY_LOGINS_RESP_LENGTH(sizeof(struct sbp2_query_logins_response)); | |
1da177e4 | 1220 | |
35bdddb8 SR |
1221 | scsi_id->query_logins_orb->status_fifo_hi = |
1222 | ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id); | |
1223 | scsi_id->query_logins_orb->status_fifo_lo = | |
1224 | ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr); | |
1da177e4 LT |
1225 | |
1226 | sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb)); | |
1227 | ||
1da177e4 LT |
1228 | sbp2util_packet_dump(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb), |
1229 | "sbp2 query logins orb", scsi_id->query_logins_orb_dma); | |
1230 | ||
1231 | memset(scsi_id->query_logins_response, 0, sizeof(struct sbp2_query_logins_response)); | |
1da177e4 | 1232 | |
1da177e4 LT |
1233 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
1234 | data[1] = scsi_id->query_logins_orb_dma; | |
1235 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1236 | ||
1da177e4 | 1237 | hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8); |
1da177e4 | 1238 | |
e8398bb7 | 1239 | if (sbp2util_access_timeout(scsi_id, 2*HZ)) { |
1da177e4 | 1240 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); |
a237f35f | 1241 | return -EIO; |
1da177e4 LT |
1242 | } |
1243 | ||
1244 | if (scsi_id->status_block.ORB_offset_lo != scsi_id->query_logins_orb_dma) { | |
1245 | SBP2_INFO("Error querying logins to SBP-2 device - timed out"); | |
a237f35f | 1246 | return -EIO; |
1da177e4 LT |
1247 | } |
1248 | ||
6065772d SR |
1249 | if (STATUS_TEST_RDS(scsi_id->status_block.ORB_offset_hi_misc)) { |
1250 | SBP2_INFO("Error querying logins to SBP-2 device - failed"); | |
a237f35f | 1251 | return -EIO; |
1da177e4 LT |
1252 | } |
1253 | ||
1254 | sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_response, sizeof(struct sbp2_query_logins_response)); | |
1255 | ||
1256 | SBP2_DEBUG("length_max_logins = %x", | |
1257 | (unsigned int)scsi_id->query_logins_response->length_max_logins); | |
1258 | ||
1da177e4 | 1259 | max_logins = RESPONSE_GET_MAX_LOGINS(scsi_id->query_logins_response->length_max_logins); |
20f45781 | 1260 | SBP2_INFO("Maximum concurrent logins supported: %d", max_logins); |
1da177e4 LT |
1261 | |
1262 | active_logins = RESPONSE_GET_ACTIVE_LOGINS(scsi_id->query_logins_response->length_max_logins); | |
20f45781 | 1263 | SBP2_INFO("Number of active logins: %d", active_logins); |
1da177e4 LT |
1264 | |
1265 | if (active_logins >= max_logins) { | |
a237f35f | 1266 | return -EIO; |
1da177e4 LT |
1267 | } |
1268 | ||
1269 | return 0; | |
1270 | } | |
1271 | ||
1272 | /* | |
1273 | * This function is called in order to login to a particular SBP-2 device, | |
1274 | * after a bus reset. | |
1275 | */ | |
1276 | static int sbp2_login_device(struct scsi_id_instance_data *scsi_id) | |
1277 | { | |
1278 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1279 | quadlet_t data[2]; | |
1280 | ||
d024ebc6 | 1281 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
1282 | |
1283 | if (!scsi_id->login_orb) { | |
d024ebc6 | 1284 | SBP2_DEBUG("%s: login_orb not alloc'd!", __FUNCTION__); |
a237f35f | 1285 | return -EIO; |
1da177e4 LT |
1286 | } |
1287 | ||
1288 | if (!exclusive_login) { | |
1289 | if (sbp2_query_logins(scsi_id)) { | |
1290 | SBP2_INFO("Device does not support any more concurrent logins"); | |
a237f35f | 1291 | return -EIO; |
1da177e4 LT |
1292 | } |
1293 | } | |
1294 | ||
1295 | /* Set-up login ORB, assume no password */ | |
1296 | scsi_id->login_orb->password_hi = 0; | |
1297 | scsi_id->login_orb->password_lo = 0; | |
1da177e4 LT |
1298 | |
1299 | scsi_id->login_orb->login_response_lo = scsi_id->login_response_dma; | |
1300 | scsi_id->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1da177e4 LT |
1301 | |
1302 | scsi_id->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST); | |
1303 | scsi_id->login_orb->lun_misc |= ORB_SET_RECONNECT(0); /* One second reconnect time */ | |
1304 | scsi_id->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(exclusive_login); /* Exclusive access to device */ | |
1305 | scsi_id->login_orb->lun_misc |= ORB_SET_NOTIFY(1); /* Notify us of login complete */ | |
e309fc6d | 1306 | scsi_id->login_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_lun); |
1da177e4 LT |
1307 | |
1308 | scsi_id->login_orb->passwd_resp_lengths = | |
1309 | ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response)); | |
1da177e4 | 1310 | |
35bdddb8 SR |
1311 | scsi_id->login_orb->status_fifo_hi = |
1312 | ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id); | |
1313 | scsi_id->login_orb->status_fifo_lo = | |
1314 | ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr); | |
1da177e4 | 1315 | |
1da177e4 LT |
1316 | sbp2util_cpu_to_be32_buffer(scsi_id->login_orb, sizeof(struct sbp2_login_orb)); |
1317 | ||
1da177e4 LT |
1318 | sbp2util_packet_dump(scsi_id->login_orb, sizeof(struct sbp2_login_orb), |
1319 | "sbp2 login orb", scsi_id->login_orb_dma); | |
1320 | ||
1da177e4 | 1321 | memset(scsi_id->login_response, 0, sizeof(struct sbp2_login_response)); |
1da177e4 | 1322 | |
1da177e4 LT |
1323 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
1324 | data[1] = scsi_id->login_orb_dma; | |
1325 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1326 | ||
1da177e4 | 1327 | hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8); |
1da177e4 LT |
1328 | |
1329 | /* | |
1330 | * Wait for login status (up to 20 seconds)... | |
1331 | */ | |
e8398bb7 SR |
1332 | if (sbp2util_access_timeout(scsi_id, 20*HZ)) { |
1333 | SBP2_ERR("Error logging into SBP-2 device - timed out"); | |
a237f35f | 1334 | return -EIO; |
1da177e4 LT |
1335 | } |
1336 | ||
1337 | /* | |
1338 | * Sanity. Make sure status returned matches login orb. | |
1339 | */ | |
1340 | if (scsi_id->status_block.ORB_offset_lo != scsi_id->login_orb_dma) { | |
6065772d | 1341 | SBP2_ERR("Error logging into SBP-2 device - timed out"); |
a237f35f | 1342 | return -EIO; |
1da177e4 LT |
1343 | } |
1344 | ||
6065772d SR |
1345 | if (STATUS_TEST_RDS(scsi_id->status_block.ORB_offset_hi_misc)) { |
1346 | SBP2_ERR("Error logging into SBP-2 device - failed"); | |
a237f35f | 1347 | return -EIO; |
1da177e4 LT |
1348 | } |
1349 | ||
1350 | /* | |
1351 | * Byte swap the login response, for use when reconnecting or | |
1352 | * logging out. | |
1353 | */ | |
1354 | sbp2util_cpu_to_be32_buffer(scsi_id->login_response, sizeof(struct sbp2_login_response)); | |
1355 | ||
1356 | /* | |
1357 | * Grab our command block agent address from the login response. | |
1358 | */ | |
1359 | SBP2_DEBUG("command_block_agent_hi = %x", | |
1360 | (unsigned int)scsi_id->login_response->command_block_agent_hi); | |
1361 | SBP2_DEBUG("command_block_agent_lo = %x", | |
1362 | (unsigned int)scsi_id->login_response->command_block_agent_lo); | |
1363 | ||
1364 | scsi_id->sbp2_command_block_agent_addr = | |
1365 | ((u64)scsi_id->login_response->command_block_agent_hi) << 32; | |
1366 | scsi_id->sbp2_command_block_agent_addr |= ((u64)scsi_id->login_response->command_block_agent_lo); | |
1367 | scsi_id->sbp2_command_block_agent_addr &= 0x0000ffffffffffffULL; | |
1368 | ||
1369 | SBP2_INFO("Logged into SBP-2 device"); | |
a237f35f | 1370 | return 0; |
1da177e4 LT |
1371 | } |
1372 | ||
1373 | /* | |
1374 | * This function is called in order to logout from a particular SBP-2 | |
1375 | * device, usually called during driver unload. | |
1376 | */ | |
1377 | static int sbp2_logout_device(struct scsi_id_instance_data *scsi_id) | |
1378 | { | |
1379 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1380 | quadlet_t data[2]; | |
1381 | int error; | |
1382 | ||
d024ebc6 | 1383 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
1384 | |
1385 | /* | |
1386 | * Set-up logout ORB | |
1387 | */ | |
1388 | scsi_id->logout_orb->reserved1 = 0x0; | |
1389 | scsi_id->logout_orb->reserved2 = 0x0; | |
1390 | scsi_id->logout_orb->reserved3 = 0x0; | |
1391 | scsi_id->logout_orb->reserved4 = 0x0; | |
1392 | ||
1393 | scsi_id->logout_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_LOGOUT_REQUEST); | |
1394 | scsi_id->logout_orb->login_ID_misc |= ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID); | |
1395 | ||
1396 | /* Notify us when complete */ | |
1397 | scsi_id->logout_orb->login_ID_misc |= ORB_SET_NOTIFY(1); | |
1398 | ||
1399 | scsi_id->logout_orb->reserved5 = 0x0; | |
35bdddb8 SR |
1400 | scsi_id->logout_orb->status_fifo_hi = |
1401 | ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id); | |
1402 | scsi_id->logout_orb->status_fifo_lo = | |
1403 | ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr); | |
1da177e4 LT |
1404 | |
1405 | /* | |
1406 | * Byte swap ORB if necessary | |
1407 | */ | |
1408 | sbp2util_cpu_to_be32_buffer(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb)); | |
1409 | ||
1410 | sbp2util_packet_dump(scsi_id->logout_orb, sizeof(struct sbp2_logout_orb), | |
1411 | "sbp2 logout orb", scsi_id->logout_orb_dma); | |
1412 | ||
1413 | /* | |
1414 | * Ok, let's write to the target's management agent register | |
1415 | */ | |
1416 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); | |
1417 | data[1] = scsi_id->logout_orb_dma; | |
1418 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1419 | ||
1da177e4 | 1420 | error = hpsb_node_write(scsi_id->ne, |
a237f35f | 1421 | scsi_id->sbp2_management_agent_addr, data, 8); |
1da177e4 LT |
1422 | if (error) |
1423 | return error; | |
1424 | ||
1425 | /* Wait for device to logout...1 second. */ | |
e8398bb7 | 1426 | if (sbp2util_access_timeout(scsi_id, HZ)) |
1da177e4 LT |
1427 | return -EIO; |
1428 | ||
1429 | SBP2_INFO("Logged out of SBP-2 device"); | |
a237f35f | 1430 | return 0; |
1da177e4 LT |
1431 | } |
1432 | ||
1433 | /* | |
1434 | * This function is called in order to reconnect to a particular SBP-2 | |
1435 | * device, after a bus reset. | |
1436 | */ | |
1437 | static int sbp2_reconnect_device(struct scsi_id_instance_data *scsi_id) | |
1438 | { | |
1439 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1440 | quadlet_t data[2]; | |
1441 | int error; | |
1442 | ||
d024ebc6 | 1443 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
1444 | |
1445 | /* | |
1446 | * Set-up reconnect ORB | |
1447 | */ | |
1448 | scsi_id->reconnect_orb->reserved1 = 0x0; | |
1449 | scsi_id->reconnect_orb->reserved2 = 0x0; | |
1450 | scsi_id->reconnect_orb->reserved3 = 0x0; | |
1451 | scsi_id->reconnect_orb->reserved4 = 0x0; | |
1452 | ||
1453 | scsi_id->reconnect_orb->login_ID_misc = ORB_SET_FUNCTION(SBP2_RECONNECT_REQUEST); | |
1454 | scsi_id->reconnect_orb->login_ID_misc |= | |
1455 | ORB_SET_LOGIN_ID(scsi_id->login_response->length_login_ID); | |
1456 | ||
1457 | /* Notify us when complete */ | |
1458 | scsi_id->reconnect_orb->login_ID_misc |= ORB_SET_NOTIFY(1); | |
1459 | ||
1460 | scsi_id->reconnect_orb->reserved5 = 0x0; | |
35bdddb8 SR |
1461 | scsi_id->reconnect_orb->status_fifo_hi = |
1462 | ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id); | |
1463 | scsi_id->reconnect_orb->status_fifo_lo = | |
1464 | ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr); | |
1da177e4 LT |
1465 | |
1466 | /* | |
1467 | * Byte swap ORB if necessary | |
1468 | */ | |
1469 | sbp2util_cpu_to_be32_buffer(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb)); | |
1470 | ||
1471 | sbp2util_packet_dump(scsi_id->reconnect_orb, sizeof(struct sbp2_reconnect_orb), | |
1472 | "sbp2 reconnect orb", scsi_id->reconnect_orb_dma); | |
1473 | ||
1da177e4 LT |
1474 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
1475 | data[1] = scsi_id->reconnect_orb_dma; | |
1476 | sbp2util_cpu_to_be32_buffer(data, 8); | |
1477 | ||
1da177e4 | 1478 | error = hpsb_node_write(scsi_id->ne, |
a237f35f | 1479 | scsi_id->sbp2_management_agent_addr, data, 8); |
1da177e4 LT |
1480 | if (error) |
1481 | return error; | |
1482 | ||
1483 | /* | |
1484 | * Wait for reconnect status (up to 1 second)... | |
1485 | */ | |
e8398bb7 SR |
1486 | if (sbp2util_access_timeout(scsi_id, HZ)) { |
1487 | SBP2_ERR("Error reconnecting to SBP-2 device - timed out"); | |
a237f35f | 1488 | return -EIO; |
1da177e4 LT |
1489 | } |
1490 | ||
1491 | /* | |
1492 | * Sanity. Make sure status returned matches reconnect orb. | |
1493 | */ | |
1494 | if (scsi_id->status_block.ORB_offset_lo != scsi_id->reconnect_orb_dma) { | |
6065772d | 1495 | SBP2_ERR("Error reconnecting to SBP-2 device - timed out"); |
a237f35f | 1496 | return -EIO; |
1da177e4 LT |
1497 | } |
1498 | ||
6065772d SR |
1499 | if (STATUS_TEST_RDS(scsi_id->status_block.ORB_offset_hi_misc)) { |
1500 | SBP2_ERR("Error reconnecting to SBP-2 device - failed"); | |
a237f35f | 1501 | return -EIO; |
1da177e4 LT |
1502 | } |
1503 | ||
1504 | HPSB_DEBUG("Reconnected to SBP-2 device"); | |
a237f35f | 1505 | return 0; |
1da177e4 LT |
1506 | } |
1507 | ||
1508 | /* | |
1509 | * This function is called in order to set the busy timeout (number of | |
1510 | * retries to attempt) on the sbp2 device. | |
1511 | */ | |
1512 | static int sbp2_set_busy_timeout(struct scsi_id_instance_data *scsi_id) | |
1513 | { | |
1514 | quadlet_t data; | |
1515 | ||
d024ebc6 | 1516 | SBP2_DEBUG_ENTER(); |
1da177e4 | 1517 | |
1da177e4 | 1518 | data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE); |
d024ebc6 SR |
1519 | if (hpsb_node_write(scsi_id->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4)) |
1520 | SBP2_ERR("%s error", __FUNCTION__); | |
a237f35f | 1521 | return 0; |
1da177e4 LT |
1522 | } |
1523 | ||
1da177e4 LT |
1524 | /* |
1525 | * This function is called to parse sbp2 device's config rom unit | |
1526 | * directory. Used to determine things like sbp2 management agent offset, | |
1527 | * and command set used (SCSI or RBC). | |
1528 | */ | |
1529 | static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id, | |
1530 | struct unit_directory *ud) | |
1531 | { | |
1532 | struct csr1212_keyval *kv; | |
1533 | struct csr1212_dentry *dentry; | |
1534 | u64 management_agent_addr; | |
1535 | u32 command_set_spec_id, command_set, unit_characteristics, | |
24d3bf88 SR |
1536 | firmware_revision; |
1537 | unsigned workarounds; | |
1da177e4 LT |
1538 | int i; |
1539 | ||
d024ebc6 | 1540 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
1541 | |
1542 | management_agent_addr = 0x0; | |
1543 | command_set_spec_id = 0x0; | |
1544 | command_set = 0x0; | |
1545 | unit_characteristics = 0x0; | |
1546 | firmware_revision = 0x0; | |
1547 | ||
1548 | /* Handle different fields in the unit directory, based on keys */ | |
1549 | csr1212_for_each_dir_entry(ud->ne->csr, kv, ud->ud_kv, dentry) { | |
1550 | switch (kv->key.id) { | |
1551 | case CSR1212_KV_ID_DEPENDENT_INFO: | |
1552 | if (kv->key.type == CSR1212_KV_TYPE_CSR_OFFSET) { | |
1553 | /* Save off the management agent address */ | |
1554 | management_agent_addr = | |
a237f35f SR |
1555 | CSR1212_REGISTER_SPACE_BASE + |
1556 | (kv->value.csr_offset << 2); | |
1da177e4 LT |
1557 | |
1558 | SBP2_DEBUG("sbp2_management_agent_addr = %x", | |
a237f35f | 1559 | (unsigned int)management_agent_addr); |
1da177e4 | 1560 | } else if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) { |
a237f35f SR |
1561 | scsi_id->sbp2_lun = |
1562 | ORB_SET_LUN(kv->value.immediate); | |
1da177e4 LT |
1563 | } |
1564 | break; | |
1565 | ||
1566 | case SBP2_COMMAND_SET_SPEC_ID_KEY: | |
1567 | /* Command spec organization */ | |
1568 | command_set_spec_id = kv->value.immediate; | |
1569 | SBP2_DEBUG("sbp2_command_set_spec_id = %x", | |
a237f35f | 1570 | (unsigned int)command_set_spec_id); |
1da177e4 LT |
1571 | break; |
1572 | ||
1573 | case SBP2_COMMAND_SET_KEY: | |
1574 | /* Command set used by sbp2 device */ | |
1575 | command_set = kv->value.immediate; | |
1576 | SBP2_DEBUG("sbp2_command_set = %x", | |
a237f35f | 1577 | (unsigned int)command_set); |
1da177e4 LT |
1578 | break; |
1579 | ||
1580 | case SBP2_UNIT_CHARACTERISTICS_KEY: | |
1581 | /* | |
1582 | * Unit characterisitcs (orb related stuff | |
1583 | * that I'm not yet paying attention to) | |
1584 | */ | |
1585 | unit_characteristics = kv->value.immediate; | |
1586 | SBP2_DEBUG("sbp2_unit_characteristics = %x", | |
a237f35f | 1587 | (unsigned int)unit_characteristics); |
1da177e4 LT |
1588 | break; |
1589 | ||
1590 | case SBP2_FIRMWARE_REVISION_KEY: | |
1591 | /* Firmware revision */ | |
1592 | firmware_revision = kv->value.immediate; | |
24d3bf88 SR |
1593 | SBP2_DEBUG("sbp2_firmware_revision = %x", |
1594 | (unsigned int)firmware_revision); | |
1da177e4 LT |
1595 | break; |
1596 | ||
1597 | default: | |
1598 | break; | |
1599 | } | |
1600 | } | |
1601 | ||
24d3bf88 | 1602 | workarounds = sbp2_default_workarounds; |
1da177e4 | 1603 | |
679c0cd2 SR |
1604 | if (!(workarounds & SBP2_WORKAROUND_OVERRIDE)) |
1605 | for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) { | |
1606 | if (sbp2_workarounds_table[i].firmware_revision && | |
1607 | sbp2_workarounds_table[i].firmware_revision != | |
1608 | (firmware_revision & 0xffff00)) | |
1609 | continue; | |
1610 | if (sbp2_workarounds_table[i].model_id && | |
1611 | sbp2_workarounds_table[i].model_id != ud->model_id) | |
1612 | continue; | |
1613 | workarounds |= sbp2_workarounds_table[i].workarounds; | |
1614 | break; | |
1615 | } | |
1da177e4 | 1616 | |
24d3bf88 | 1617 | if (workarounds) |
e9a1c52c SR |
1618 | SBP2_INFO("Workarounds for node " NODE_BUS_FMT ": 0x%x " |
1619 | "(firmware_revision 0x%06x, vendor_id 0x%06x," | |
1620 | " model_id 0x%06x)", | |
24d3bf88 | 1621 | NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid), |
e9a1c52c SR |
1622 | workarounds, firmware_revision, |
1623 | ud->vendor_id ? ud->vendor_id : ud->ne->vendor_id, | |
1624 | ud->model_id); | |
24d3bf88 SR |
1625 | |
1626 | /* We would need one SCSI host template for each target to adjust | |
1627 | * max_sectors on the fly, therefore warn only. */ | |
1628 | if (workarounds & SBP2_WORKAROUND_128K_MAX_TRANS && | |
1629 | (max_sectors * 512) > (128 * 1024)) | |
1630 | SBP2_WARN("Node " NODE_BUS_FMT ": Bridge only supports 128KB " | |
1631 | "max transfer size. WARNING: Current max_sectors " | |
1632 | "setting is larger than 128KB (%d sectors)", | |
1633 | NODE_BUS_ARGS(ud->ne->host, ud->ne->nodeid), | |
1634 | max_sectors); | |
1635 | ||
1da177e4 LT |
1636 | /* If this is a logical unit directory entry, process the parent |
1637 | * to get the values. */ | |
1638 | if (ud->flags & UNIT_DIRECTORY_LUN_DIRECTORY) { | |
1639 | struct unit_directory *parent_ud = | |
1640 | container_of(ud->device.parent, struct unit_directory, device); | |
1641 | sbp2_parse_unit_directory(scsi_id, parent_ud); | |
1642 | } else { | |
1643 | scsi_id->sbp2_management_agent_addr = management_agent_addr; | |
1644 | scsi_id->sbp2_command_set_spec_id = command_set_spec_id; | |
1645 | scsi_id->sbp2_command_set = command_set; | |
1646 | scsi_id->sbp2_unit_characteristics = unit_characteristics; | |
1647 | scsi_id->sbp2_firmware_revision = firmware_revision; | |
1648 | scsi_id->workarounds = workarounds; | |
1649 | if (ud->flags & UNIT_DIRECTORY_HAS_LUN) | |
e309fc6d | 1650 | scsi_id->sbp2_lun = ORB_SET_LUN(ud->lun); |
1da177e4 LT |
1651 | } |
1652 | } | |
1653 | ||
fd23ade8 BC |
1654 | #define SBP2_PAYLOAD_TO_BYTES(p) (1 << ((p) + 2)) |
1655 | ||
1da177e4 LT |
1656 | /* |
1657 | * This function is called in order to determine the max speed and packet | |
1658 | * size we can use in our ORBs. Note, that we (the driver and host) only | |
1659 | * initiate the transaction. The SBP-2 device actually transfers the data | |
1660 | * (by reading from the DMA area we tell it). This means that the SBP-2 | |
1661 | * device decides the actual maximum data it can transfer. We just tell it | |
1662 | * the speed that it needs to use, and the max_rec the host supports, and | |
1663 | * it takes care of the rest. | |
1664 | */ | |
1665 | static int sbp2_max_speed_and_size(struct scsi_id_instance_data *scsi_id) | |
1666 | { | |
1667 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
fd23ade8 | 1668 | u8 payload; |
1da177e4 | 1669 | |
d024ebc6 | 1670 | SBP2_DEBUG_ENTER(); |
1da177e4 | 1671 | |
a237f35f | 1672 | scsi_id->speed_code = |
647dcb5f | 1673 | hi->host->speed[NODEID_TO_NODE(scsi_id->ne->nodeid)]; |
1da177e4 LT |
1674 | |
1675 | /* Bump down our speed if the user requested it */ | |
1676 | if (scsi_id->speed_code > max_speed) { | |
1677 | scsi_id->speed_code = max_speed; | |
1678 | SBP2_ERR("Forcing SBP-2 max speed down to %s", | |
1679 | hpsb_speedto_str[scsi_id->speed_code]); | |
1680 | } | |
1681 | ||
1682 | /* Payload size is the lesser of what our speed supports and what | |
1683 | * our host supports. */ | |
fd23ade8 BC |
1684 | payload = min(sbp2_speedto_max_payload[scsi_id->speed_code], |
1685 | (u8) (hi->host->csr.max_rec - 1)); | |
1686 | ||
1687 | /* If physical DMA is off, work around limitation in ohci1394: | |
1688 | * packet size must not exceed PAGE_SIZE */ | |
1689 | if (scsi_id->ne->host->low_addr_space < (1ULL << 32)) | |
1690 | while (SBP2_PAYLOAD_TO_BYTES(payload) + 24 > PAGE_SIZE && | |
1691 | payload) | |
1692 | payload--; | |
1da177e4 LT |
1693 | |
1694 | HPSB_DEBUG("Node " NODE_BUS_FMT ": Max speed [%s] - Max payload [%u]", | |
1695 | NODE_BUS_ARGS(hi->host, scsi_id->ne->nodeid), | |
1696 | hpsb_speedto_str[scsi_id->speed_code], | |
fd23ade8 | 1697 | SBP2_PAYLOAD_TO_BYTES(payload)); |
1da177e4 | 1698 | |
fd23ade8 | 1699 | scsi_id->max_payload_size = payload; |
a237f35f | 1700 | return 0; |
1da177e4 LT |
1701 | } |
1702 | ||
1703 | /* | |
1704 | * This function is called in order to perform a SBP-2 agent reset. | |
1705 | */ | |
1706 | static int sbp2_agent_reset(struct scsi_id_instance_data *scsi_id, int wait) | |
1707 | { | |
1708 | quadlet_t data; | |
1709 | u64 addr; | |
1710 | int retval; | |
cc078189 | 1711 | unsigned long flags; |
1da177e4 | 1712 | |
d024ebc6 | 1713 | SBP2_DEBUG_ENTER(); |
1da177e4 | 1714 | |
09ee67ab SR |
1715 | cancel_delayed_work(&scsi_id->protocol_work); |
1716 | if (wait) | |
1717 | flush_scheduled_work(); | |
1718 | ||
1da177e4 LT |
1719 | data = ntohl(SBP2_AGENT_RESET_DATA); |
1720 | addr = scsi_id->sbp2_command_block_agent_addr + SBP2_AGENT_RESET_OFFSET; | |
1721 | ||
1722 | if (wait) | |
1723 | retval = hpsb_node_write(scsi_id->ne, addr, &data, 4); | |
1724 | else | |
1725 | retval = sbp2util_node_write_no_wait(scsi_id->ne, addr, &data, 4); | |
1726 | ||
1727 | if (retval < 0) { | |
1728 | SBP2_ERR("hpsb_node_write failed.\n"); | |
1729 | return -EIO; | |
1730 | } | |
1731 | ||
1732 | /* | |
1733 | * Need to make sure orb pointer is written on next command | |
1734 | */ | |
cc078189 | 1735 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 | 1736 | scsi_id->last_orb = NULL; |
cc078189 | 1737 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 | 1738 | |
a237f35f | 1739 | return 0; |
1da177e4 LT |
1740 | } |
1741 | ||
cf8d2c09 SR |
1742 | static void sbp2_prep_command_orb_sg(struct sbp2_command_orb *orb, |
1743 | struct sbp2scsi_host_info *hi, | |
1744 | struct sbp2_command_info *command, | |
1745 | unsigned int scsi_use_sg, | |
1746 | struct scatterlist *sgpnt, | |
1747 | u32 orb_direction, | |
1748 | enum dma_data_direction dma_dir) | |
1749 | { | |
1750 | command->dma_dir = dma_dir; | |
1751 | orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1752 | orb->misc |= ORB_SET_DIRECTION(orb_direction); | |
1753 | ||
1754 | /* Special case if only one element (and less than 64KB in size) */ | |
1755 | if ((scsi_use_sg == 1) && | |
1756 | (sgpnt[0].length <= SBP2_MAX_SG_ELEMENT_LENGTH)) { | |
1757 | ||
1758 | SBP2_DEBUG("Only one s/g element"); | |
1759 | command->dma_size = sgpnt[0].length; | |
1760 | command->dma_type = CMD_DMA_PAGE; | |
1761 | command->cmd_dma = pci_map_page(hi->host->pdev, | |
1762 | sgpnt[0].page, | |
1763 | sgpnt[0].offset, | |
1764 | command->dma_size, | |
1765 | command->dma_dir); | |
1766 | SBP2_DMA_ALLOC("single page scatter element"); | |
1767 | ||
1768 | orb->data_descriptor_lo = command->cmd_dma; | |
1769 | orb->misc |= ORB_SET_DATA_SIZE(command->dma_size); | |
1770 | ||
1771 | } else { | |
1772 | struct sbp2_unrestricted_page_table *sg_element = | |
1773 | &command->scatter_gather_element[0]; | |
1774 | u32 sg_count, sg_len; | |
1775 | dma_addr_t sg_addr; | |
1776 | int i, count = pci_map_sg(hi->host->pdev, sgpnt, scsi_use_sg, | |
1777 | dma_dir); | |
1778 | ||
1779 | SBP2_DMA_ALLOC("scatter list"); | |
1780 | ||
1781 | command->dma_size = scsi_use_sg; | |
1782 | command->sge_buffer = sgpnt; | |
1783 | ||
1784 | /* use page tables (s/g) */ | |
1785 | orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); | |
1786 | orb->data_descriptor_lo = command->sge_dma; | |
1787 | ||
1788 | /* | |
1789 | * Loop through and fill out our sbp-2 page tables | |
1790 | * (and split up anything too large) | |
1791 | */ | |
1792 | for (i = 0, sg_count = 0 ; i < count; i++, sgpnt++) { | |
1793 | sg_len = sg_dma_len(sgpnt); | |
1794 | sg_addr = sg_dma_address(sgpnt); | |
1795 | while (sg_len) { | |
1796 | sg_element[sg_count].segment_base_lo = sg_addr; | |
1797 | if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { | |
1798 | sg_element[sg_count].length_segment_base_hi = | |
1799 | PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); | |
1800 | sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; | |
1801 | sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; | |
1802 | } else { | |
1803 | sg_element[sg_count].length_segment_base_hi = | |
1804 | PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); | |
1805 | sg_len = 0; | |
1806 | } | |
1807 | sg_count++; | |
1808 | } | |
1809 | } | |
1810 | ||
1811 | /* Number of page table (s/g) elements */ | |
1812 | orb->misc |= ORB_SET_DATA_SIZE(sg_count); | |
1813 | ||
1814 | sbp2util_packet_dump(sg_element, | |
1815 | (sizeof(struct sbp2_unrestricted_page_table)) * sg_count, | |
1816 | "sbp2 s/g list", command->sge_dma); | |
1817 | ||
1818 | /* Byte swap page tables if necessary */ | |
1819 | sbp2util_cpu_to_be32_buffer(sg_element, | |
1820 | (sizeof(struct sbp2_unrestricted_page_table)) * | |
1821 | sg_count); | |
1822 | } | |
1823 | } | |
1824 | ||
1825 | static void sbp2_prep_command_orb_no_sg(struct sbp2_command_orb *orb, | |
1826 | struct sbp2scsi_host_info *hi, | |
1827 | struct sbp2_command_info *command, | |
1828 | struct scatterlist *sgpnt, | |
1829 | u32 orb_direction, | |
1830 | unsigned int scsi_request_bufflen, | |
1831 | void *scsi_request_buffer, | |
1832 | enum dma_data_direction dma_dir) | |
1833 | { | |
1834 | command->dma_dir = dma_dir; | |
1835 | command->dma_size = scsi_request_bufflen; | |
1836 | command->dma_type = CMD_DMA_SINGLE; | |
1837 | command->cmd_dma = pci_map_single(hi->host->pdev, scsi_request_buffer, | |
1838 | command->dma_size, command->dma_dir); | |
1839 | orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id); | |
1840 | orb->misc |= ORB_SET_DIRECTION(orb_direction); | |
1841 | ||
1842 | SBP2_DMA_ALLOC("single bulk"); | |
1843 | ||
1844 | /* | |
1845 | * Handle case where we get a command w/o s/g enabled (but | |
1846 | * check for transfers larger than 64K) | |
1847 | */ | |
1848 | if (scsi_request_bufflen <= SBP2_MAX_SG_ELEMENT_LENGTH) { | |
1849 | ||
1850 | orb->data_descriptor_lo = command->cmd_dma; | |
1851 | orb->misc |= ORB_SET_DATA_SIZE(scsi_request_bufflen); | |
1852 | ||
1853 | } else { | |
1854 | struct sbp2_unrestricted_page_table *sg_element = | |
1855 | &command->scatter_gather_element[0]; | |
1856 | u32 sg_count, sg_len; | |
1857 | dma_addr_t sg_addr; | |
1858 | ||
1859 | /* | |
1860 | * Need to turn this into page tables, since the | |
1861 | * buffer is too large. | |
1862 | */ | |
1863 | orb->data_descriptor_lo = command->sge_dma; | |
1864 | ||
1865 | /* Use page tables (s/g) */ | |
1866 | orb->misc |= ORB_SET_PAGE_TABLE_PRESENT(0x1); | |
1867 | ||
1868 | /* | |
1869 | * fill out our sbp-2 page tables (and split up | |
1870 | * the large buffer) | |
1871 | */ | |
1872 | sg_count = 0; | |
1873 | sg_len = scsi_request_bufflen; | |
1874 | sg_addr = command->cmd_dma; | |
1875 | while (sg_len) { | |
1876 | sg_element[sg_count].segment_base_lo = sg_addr; | |
1877 | if (sg_len > SBP2_MAX_SG_ELEMENT_LENGTH) { | |
1878 | sg_element[sg_count].length_segment_base_hi = | |
1879 | PAGE_TABLE_SET_SEGMENT_LENGTH(SBP2_MAX_SG_ELEMENT_LENGTH); | |
1880 | sg_addr += SBP2_MAX_SG_ELEMENT_LENGTH; | |
1881 | sg_len -= SBP2_MAX_SG_ELEMENT_LENGTH; | |
1882 | } else { | |
1883 | sg_element[sg_count].length_segment_base_hi = | |
1884 | PAGE_TABLE_SET_SEGMENT_LENGTH(sg_len); | |
1885 | sg_len = 0; | |
1886 | } | |
1887 | sg_count++; | |
1888 | } | |
1889 | ||
1890 | /* Number of page table (s/g) elements */ | |
1891 | orb->misc |= ORB_SET_DATA_SIZE(sg_count); | |
1892 | ||
1893 | sbp2util_packet_dump(sg_element, | |
1894 | (sizeof(struct sbp2_unrestricted_page_table)) * sg_count, | |
1895 | "sbp2 s/g list", command->sge_dma); | |
1896 | ||
1897 | /* Byte swap page tables if necessary */ | |
1898 | sbp2util_cpu_to_be32_buffer(sg_element, | |
1899 | (sizeof(struct sbp2_unrestricted_page_table)) * | |
1900 | sg_count); | |
1901 | } | |
1902 | } | |
1903 | ||
1da177e4 LT |
1904 | /* |
1905 | * This function is called to create the actual command orb and s/g list | |
1906 | * out of the scsi command itself. | |
1907 | */ | |
cf8d2c09 SR |
1908 | static void sbp2_create_command_orb(struct scsi_id_instance_data *scsi_id, |
1909 | struct sbp2_command_info *command, | |
1910 | unchar *scsi_cmd, | |
1911 | unsigned int scsi_use_sg, | |
1912 | unsigned int scsi_request_bufflen, | |
1913 | void *scsi_request_buffer, | |
1914 | enum dma_data_direction dma_dir) | |
1da177e4 LT |
1915 | { |
1916 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
a237f35f | 1917 | struct scatterlist *sgpnt = (struct scatterlist *)scsi_request_buffer; |
1da177e4 | 1918 | struct sbp2_command_orb *command_orb = &command->command_orb; |
cf8d2c09 | 1919 | u32 orb_direction; |
1da177e4 LT |
1920 | |
1921 | /* | |
1922 | * Set-up our command ORB.. | |
1923 | * | |
1924 | * NOTE: We're doing unrestricted page tables (s/g), as this is | |
1925 | * best performance (at least with the devices I have). This means | |
1926 | * that data_size becomes the number of s/g elements, and | |
1927 | * page_size should be zero (for unrestricted). | |
1928 | */ | |
1929 | command_orb->next_ORB_hi = ORB_SET_NULL_PTR(1); | |
1930 | command_orb->next_ORB_lo = 0x0; | |
1931 | command_orb->misc = ORB_SET_MAX_PAYLOAD(scsi_id->max_payload_size); | |
1932 | command_orb->misc |= ORB_SET_SPEED(scsi_id->speed_code); | |
a237f35f | 1933 | command_orb->misc |= ORB_SET_NOTIFY(1); /* Notify us when complete */ |
1da177e4 | 1934 | |
43863eba | 1935 | if (dma_dir == DMA_NONE) |
a237f35f | 1936 | orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; |
43863eba | 1937 | else if (dma_dir == DMA_TO_DEVICE && scsi_request_bufflen) |
a237f35f | 1938 | orb_direction = ORB_DIRECTION_WRITE_TO_MEDIA; |
43863eba | 1939 | else if (dma_dir == DMA_FROM_DEVICE && scsi_request_bufflen) |
a237f35f | 1940 | orb_direction = ORB_DIRECTION_READ_FROM_MEDIA; |
43863eba SR |
1941 | else { |
1942 | SBP2_WARN("Falling back to DMA_NONE"); | |
1943 | orb_direction = ORB_DIRECTION_NO_DATA_TRANSFER; | |
1da177e4 LT |
1944 | } |
1945 | ||
cf8d2c09 | 1946 | /* Set-up our pagetable stuff */ |
1da177e4 | 1947 | if (orb_direction == ORB_DIRECTION_NO_DATA_TRANSFER) { |
1da177e4 | 1948 | SBP2_DEBUG("No data transfer"); |
1da177e4 LT |
1949 | command_orb->data_descriptor_hi = 0x0; |
1950 | command_orb->data_descriptor_lo = 0x0; | |
1951 | command_orb->misc |= ORB_SET_DIRECTION(1); | |
1da177e4 | 1952 | } else if (scsi_use_sg) { |
1da177e4 | 1953 | SBP2_DEBUG("Use scatter/gather"); |
cf8d2c09 SR |
1954 | sbp2_prep_command_orb_sg(command_orb, hi, command, scsi_use_sg, |
1955 | sgpnt, orb_direction, dma_dir); | |
1da177e4 | 1956 | } else { |
1da177e4 | 1957 | SBP2_DEBUG("No scatter/gather"); |
cf8d2c09 SR |
1958 | sbp2_prep_command_orb_no_sg(command_orb, hi, command, sgpnt, |
1959 | orb_direction, scsi_request_bufflen, | |
1960 | scsi_request_buffer, dma_dir); | |
1da177e4 LT |
1961 | } |
1962 | ||
cf8d2c09 | 1963 | /* Byte swap command ORB if necessary */ |
1da177e4 LT |
1964 | sbp2util_cpu_to_be32_buffer(command_orb, sizeof(struct sbp2_command_orb)); |
1965 | ||
cf8d2c09 | 1966 | /* Put our scsi command in the command ORB */ |
1da177e4 LT |
1967 | memset(command_orb->cdb, 0, 12); |
1968 | memcpy(command_orb->cdb, scsi_cmd, COMMAND_SIZE(*scsi_cmd)); | |
1da177e4 LT |
1969 | } |
1970 | ||
1971 | /* | |
1972 | * This function is called in order to begin a regular SBP-2 command. | |
1973 | */ | |
28212767 | 1974 | static void sbp2_link_orb_command(struct scsi_id_instance_data *scsi_id, |
1da177e4 LT |
1975 | struct sbp2_command_info *command) |
1976 | { | |
1977 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
1978 | struct sbp2_command_orb *command_orb = &command->command_orb; | |
cc078189 SR |
1979 | struct sbp2_command_orb *last_orb; |
1980 | dma_addr_t last_orb_dma; | |
1981 | u64 addr = scsi_id->sbp2_command_block_agent_addr; | |
1982 | quadlet_t data[2]; | |
1983 | size_t length; | |
1984 | unsigned long flags; | |
1da177e4 LT |
1985 | |
1986 | outstanding_orb_incr; | |
1987 | SBP2_ORB_DEBUG("sending command orb %p, total orbs = %x", | |
a237f35f | 1988 | command_orb, global_outstanding_command_orbs); |
1da177e4 LT |
1989 | |
1990 | pci_dma_sync_single_for_device(hi->host->pdev, command->command_orb_dma, | |
1991 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 1992 | PCI_DMA_TODEVICE); |
1da177e4 LT |
1993 | pci_dma_sync_single_for_device(hi->host->pdev, command->sge_dma, |
1994 | sizeof(command->scatter_gather_element), | |
1995 | PCI_DMA_BIDIRECTIONAL); | |
1996 | /* | |
1997 | * Check to see if there are any previous orbs to use | |
1998 | */ | |
cc078189 SR |
1999 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
2000 | last_orb = scsi_id->last_orb; | |
2001 | last_orb_dma = scsi_id->last_orb_dma; | |
2002 | if (!last_orb) { | |
1da177e4 | 2003 | /* |
cc078189 SR |
2004 | * last_orb == NULL means: We know that the target's fetch agent |
2005 | * is not active right now. | |
1da177e4 | 2006 | */ |
cc078189 | 2007 | addr += SBP2_ORB_POINTER_OFFSET; |
1da177e4 LT |
2008 | data[0] = ORB_SET_NODE_ID(hi->host->node_id); |
2009 | data[1] = command->command_orb_dma; | |
2010 | sbp2util_cpu_to_be32_buffer(data, 8); | |
cc078189 | 2011 | length = 8; |
1da177e4 | 2012 | } else { |
1da177e4 | 2013 | /* |
cc078189 SR |
2014 | * last_orb != NULL means: We know that the target's fetch agent |
2015 | * is (very probably) not dead or in reset state right now. | |
2016 | * We have an ORB already sent that we can append a new one to. | |
2017 | * The target's fetch agent may or may not have read this | |
2018 | * previous ORB yet. | |
1da177e4 | 2019 | */ |
cc078189 SR |
2020 | pci_dma_sync_single_for_cpu(hi->host->pdev, last_orb_dma, |
2021 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 2022 | PCI_DMA_TODEVICE); |
cc078189 SR |
2023 | last_orb->next_ORB_lo = cpu_to_be32(command->command_orb_dma); |
2024 | wmb(); | |
1da177e4 | 2025 | /* Tells hardware that this pointer is valid */ |
cc078189 SR |
2026 | last_orb->next_ORB_hi = 0; |
2027 | pci_dma_sync_single_for_device(hi->host->pdev, last_orb_dma, | |
1da177e4 | 2028 | sizeof(struct sbp2_command_orb), |
d4018d7f | 2029 | PCI_DMA_TODEVICE); |
cc078189 SR |
2030 | addr += SBP2_DOORBELL_OFFSET; |
2031 | data[0] = 0; | |
2032 | length = 4; | |
2033 | } | |
2034 | scsi_id->last_orb = command_orb; | |
2035 | scsi_id->last_orb_dma = command->command_orb_dma; | |
2036 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); | |
1da177e4 | 2037 | |
cc078189 SR |
2038 | SBP2_ORB_DEBUG("write to %s register, command orb %p", |
2039 | last_orb ? "DOORBELL" : "ORB_POINTER", command_orb); | |
09ee67ab SR |
2040 | if (sbp2util_node_write_no_wait(scsi_id->ne, addr, data, length)) { |
2041 | /* | |
2042 | * sbp2util_node_write_no_wait failed. We certainly ran out | |
2043 | * of transaction labels, perhaps just because there were no | |
2044 | * context switches which gave khpsbpkt a chance to collect | |
2045 | * free tlabels. Try again in non-atomic context. If necessary, | |
2046 | * the workqueue job will sleep to guaranteedly get a tlabel. | |
2047 | * We do not accept new commands until the job is over. | |
2048 | */ | |
2049 | scsi_block_requests(scsi_id->scsi_host); | |
2050 | PREPARE_WORK(&scsi_id->protocol_work, | |
2051 | last_orb ? sbp2util_write_doorbell: | |
2052 | sbp2util_write_orb_pointer, | |
2053 | scsi_id); | |
2054 | schedule_work(&scsi_id->protocol_work); | |
2055 | } | |
1da177e4 LT |
2056 | } |
2057 | ||
2058 | /* | |
2059 | * This function is called in order to begin a regular SBP-2 command. | |
2060 | */ | |
2061 | static int sbp2_send_command(struct scsi_id_instance_data *scsi_id, | |
2062 | struct scsi_cmnd *SCpnt, | |
2063 | void (*done)(struct scsi_cmnd *)) | |
2064 | { | |
2065 | unchar *cmd = (unchar *) SCpnt->cmnd; | |
2066 | unsigned int request_bufflen = SCpnt->request_bufflen; | |
2067 | struct sbp2_command_info *command; | |
2068 | ||
d024ebc6 | 2069 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
2070 | SBP2_DEBUG("SCSI transfer size = %x", request_bufflen); |
2071 | SBP2_DEBUG("SCSI s/g elements = %x", (unsigned int)SCpnt->use_sg); | |
2072 | ||
2073 | /* | |
2074 | * Allocate a command orb and s/g structure | |
2075 | */ | |
2076 | command = sbp2util_allocate_command_orb(scsi_id, SCpnt, done); | |
2077 | if (!command) { | |
a237f35f | 2078 | return -EIO; |
1da177e4 LT |
2079 | } |
2080 | ||
1da177e4 LT |
2081 | /* |
2082 | * Now actually fill in the comamnd orb and sbp2 s/g list | |
2083 | */ | |
2084 | sbp2_create_command_orb(scsi_id, command, cmd, SCpnt->use_sg, | |
2085 | request_bufflen, SCpnt->request_buffer, | |
2086 | SCpnt->sc_data_direction); | |
1da177e4 LT |
2087 | |
2088 | sbp2util_packet_dump(&command->command_orb, sizeof(struct sbp2_command_orb), | |
2089 | "sbp2 command orb", command->command_orb_dma); | |
2090 | ||
1da177e4 LT |
2091 | /* |
2092 | * Link up the orb, and ring the doorbell if needed | |
2093 | */ | |
2094 | sbp2_link_orb_command(scsi_id, command); | |
2095 | ||
a237f35f | 2096 | return 0; |
1da177e4 LT |
2097 | } |
2098 | ||
1da177e4 LT |
2099 | /* |
2100 | * Translates SBP-2 status into SCSI sense data for check conditions | |
2101 | */ | |
2102 | static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, unchar *sense_data) | |
2103 | { | |
d024ebc6 | 2104 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
2105 | |
2106 | /* | |
2107 | * Ok, it's pretty ugly... ;-) | |
2108 | */ | |
2109 | sense_data[0] = 0x70; | |
2110 | sense_data[1] = 0x0; | |
2111 | sense_data[2] = sbp2_status[9]; | |
2112 | sense_data[3] = sbp2_status[12]; | |
2113 | sense_data[4] = sbp2_status[13]; | |
2114 | sense_data[5] = sbp2_status[14]; | |
2115 | sense_data[6] = sbp2_status[15]; | |
2116 | sense_data[7] = 10; | |
2117 | sense_data[8] = sbp2_status[16]; | |
2118 | sense_data[9] = sbp2_status[17]; | |
2119 | sense_data[10] = sbp2_status[18]; | |
2120 | sense_data[11] = sbp2_status[19]; | |
2121 | sense_data[12] = sbp2_status[10]; | |
2122 | sense_data[13] = sbp2_status[11]; | |
2123 | sense_data[14] = sbp2_status[20]; | |
2124 | sense_data[15] = sbp2_status[21]; | |
2125 | ||
a237f35f | 2126 | return sbp2_status[8] & 0x3f; /* return scsi status */ |
1da177e4 LT |
2127 | } |
2128 | ||
1da177e4 LT |
2129 | /* |
2130 | * This function deals with status writes from the SBP-2 device | |
2131 | */ | |
3e98eab4 SR |
2132 | static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, |
2133 | int destid, quadlet_t *data, u64 addr, | |
2134 | size_t length, u16 fl) | |
1da177e4 LT |
2135 | { |
2136 | struct sbp2scsi_host_info *hi; | |
2137 | struct scsi_id_instance_data *scsi_id = NULL, *scsi_id_tmp; | |
1da177e4 | 2138 | struct scsi_cmnd *SCpnt = NULL; |
3e98eab4 | 2139 | struct sbp2_status_block *sb; |
1da177e4 LT |
2140 | u32 scsi_status = SBP2_SCSI_STATUS_GOOD; |
2141 | struct sbp2_command_info *command; | |
79456197 | 2142 | unsigned long flags; |
1da177e4 | 2143 | |
d024ebc6 | 2144 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
2145 | |
2146 | sbp2util_packet_dump(data, length, "sbp2 status write by device", (u32)addr); | |
2147 | ||
6065772d SR |
2148 | if (unlikely(length < 8 || length > sizeof(struct sbp2_status_block))) { |
2149 | SBP2_ERR("Wrong size of status block"); | |
2150 | return RCODE_ADDRESS_ERROR; | |
2151 | } | |
2152 | if (unlikely(!host)) { | |
1da177e4 | 2153 | SBP2_ERR("host is NULL - this is bad!"); |
a237f35f | 2154 | return RCODE_ADDRESS_ERROR; |
1da177e4 | 2155 | } |
1da177e4 | 2156 | hi = hpsb_get_hostinfo(&sbp2_highlevel, host); |
6065772d | 2157 | if (unlikely(!hi)) { |
1da177e4 | 2158 | SBP2_ERR("host info is NULL - this is bad!"); |
a237f35f | 2159 | return RCODE_ADDRESS_ERROR; |
1da177e4 | 2160 | } |
1da177e4 | 2161 | /* |
35bdddb8 SR |
2162 | * Find our scsi_id structure by looking at the status fifo address |
2163 | * written to by the sbp2 device. | |
1da177e4 | 2164 | */ |
1da177e4 | 2165 | list_for_each_entry(scsi_id_tmp, &hi->scsi_ids, scsi_list) { |
35bdddb8 SR |
2166 | if (scsi_id_tmp->ne->nodeid == nodeid && |
2167 | scsi_id_tmp->status_fifo_addr == addr) { | |
1da177e4 LT |
2168 | scsi_id = scsi_id_tmp; |
2169 | break; | |
2170 | } | |
2171 | } | |
6065772d | 2172 | if (unlikely(!scsi_id)) { |
1da177e4 | 2173 | SBP2_ERR("scsi_id is NULL - device is gone?"); |
a237f35f | 2174 | return RCODE_ADDRESS_ERROR; |
1da177e4 LT |
2175 | } |
2176 | ||
2177 | /* | |
3e98eab4 SR |
2178 | * Put response into scsi_id status fifo buffer. The first two bytes |
2179 | * come in big endian bit order. Often the target writes only a | |
2180 | * truncated status block, minimally the first two quadlets. The rest | |
2181 | * is implied to be zeros. | |
1da177e4 | 2182 | */ |
3e98eab4 SR |
2183 | sb = &scsi_id->status_block; |
2184 | memset(sb->command_set_dependent, 0, sizeof(sb->command_set_dependent)); | |
2185 | memcpy(sb, data, length); | |
2186 | sbp2util_be32_to_cpu_buffer(sb, 8); | |
1da177e4 LT |
2187 | |
2188 | /* | |
6065772d | 2189 | * Ignore unsolicited status. Handle command ORB status. |
1da177e4 | 2190 | */ |
6065772d SR |
2191 | if (unlikely(STATUS_GET_SRC(sb->ORB_offset_hi_misc) == 2)) |
2192 | command = NULL; | |
2193 | else | |
2194 | command = sbp2util_find_command_for_orb(scsi_id, | |
2195 | sb->ORB_offset_lo); | |
1da177e4 | 2196 | if (command) { |
1da177e4 LT |
2197 | SBP2_DEBUG("Found status for command ORB"); |
2198 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma, | |
2199 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 2200 | PCI_DMA_TODEVICE); |
1da177e4 LT |
2201 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma, |
2202 | sizeof(command->scatter_gather_element), | |
2203 | PCI_DMA_BIDIRECTIONAL); | |
2204 | ||
2205 | SBP2_ORB_DEBUG("matched command orb %p", &command->command_orb); | |
2206 | outstanding_orb_decr; | |
2207 | ||
2208 | /* | |
3e98eab4 SR |
2209 | * Matched status with command, now grab scsi command pointers |
2210 | * and check status. | |
1da177e4 | 2211 | */ |
6065772d SR |
2212 | /* |
2213 | * FIXME: If the src field in the status is 1, the ORB DMA must | |
2214 | * not be reused until status for a subsequent ORB is received. | |
2215 | */ | |
1da177e4 | 2216 | SCpnt = command->Current_SCpnt; |
24c7cd06 | 2217 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 | 2218 | sbp2util_mark_command_completed(scsi_id, command); |
24c7cd06 | 2219 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2220 | |
2221 | if (SCpnt) { | |
abbca103 SR |
2222 | u32 h = sb->ORB_offset_hi_misc; |
2223 | u32 r = STATUS_GET_RESP(h); | |
2224 | ||
2225 | if (r != RESP_STATUS_REQUEST_COMPLETE) { | |
2226 | SBP2_WARN("resp 0x%x, sbp_status 0x%x", | |
2227 | r, STATUS_GET_SBP_STATUS(h)); | |
6065772d | 2228 | scsi_status = |
abbca103 SR |
2229 | r == RESP_STATUS_TRANSPORT_FAILURE ? |
2230 | SBP2_SCSI_STATUS_BUSY : | |
6065772d | 2231 | SBP2_SCSI_STATUS_COMMAND_TERMINATED; |
abbca103 | 2232 | } |
1da177e4 | 2233 | /* |
3e98eab4 | 2234 | * See if the target stored any scsi status information. |
1da177e4 | 2235 | */ |
abbca103 | 2236 | if (STATUS_GET_LEN(h) > 1) { |
1da177e4 | 2237 | SBP2_DEBUG("CHECK CONDITION"); |
3e98eab4 SR |
2238 | scsi_status = sbp2_status_to_sense_data( |
2239 | (unchar *)sb, SCpnt->sense_buffer); | |
1da177e4 | 2240 | } |
1da177e4 | 2241 | /* |
3e98eab4 SR |
2242 | * Check to see if the dead bit is set. If so, we'll |
2243 | * have to initiate a fetch agent reset. | |
1da177e4 | 2244 | */ |
abbca103 | 2245 | if (STATUS_TEST_DEAD(h)) { |
3e98eab4 SR |
2246 | SBP2_DEBUG("Dead bit set - " |
2247 | "initiating fetch agent reset"); | |
1da177e4 LT |
2248 | sbp2_agent_reset(scsi_id, 0); |
2249 | } | |
1da177e4 LT |
2250 | SBP2_ORB_DEBUG("completing command orb %p", &command->command_orb); |
2251 | } | |
2252 | ||
2253 | /* | |
cc078189 SR |
2254 | * Check here to see if there are no commands in-use. If there |
2255 | * are none, we know that the fetch agent left the active state | |
2256 | * _and_ that we did not reactivate it yet. Therefore clear | |
2257 | * last_orb so that next time we write directly to the | |
2258 | * ORB_POINTER register. That way the fetch agent does not need | |
2259 | * to refetch the next_ORB. | |
1da177e4 | 2260 | */ |
79456197 | 2261 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
cc078189 | 2262 | if (list_empty(&scsi_id->sbp2_command_orb_inuse)) |
1da177e4 | 2263 | scsi_id->last_orb = NULL; |
79456197 | 2264 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2265 | |
2266 | } else { | |
1da177e4 LT |
2267 | /* |
2268 | * It's probably a login/logout/reconnect status. | |
2269 | */ | |
3e98eab4 SR |
2270 | if ((sb->ORB_offset_lo == scsi_id->reconnect_orb_dma) || |
2271 | (sb->ORB_offset_lo == scsi_id->login_orb_dma) || | |
2272 | (sb->ORB_offset_lo == scsi_id->query_logins_orb_dma) || | |
e8398bb7 SR |
2273 | (sb->ORB_offset_lo == scsi_id->logout_orb_dma)) { |
2274 | scsi_id->access_complete = 1; | |
2275 | wake_up_interruptible(&access_wq); | |
2276 | } | |
1da177e4 LT |
2277 | } |
2278 | ||
2279 | if (SCpnt) { | |
1da177e4 LT |
2280 | SBP2_DEBUG("Completing SCSI command"); |
2281 | sbp2scsi_complete_command(scsi_id, scsi_status, SCpnt, | |
2282 | command->Current_done); | |
2283 | SBP2_ORB_DEBUG("command orb completed"); | |
2284 | } | |
2285 | ||
a237f35f | 2286 | return RCODE_COMPLETE; |
1da177e4 LT |
2287 | } |
2288 | ||
1da177e4 LT |
2289 | /************************************** |
2290 | * SCSI interface related section | |
2291 | **************************************/ | |
2292 | ||
2293 | /* | |
2294 | * This routine is the main request entry routine for doing I/O. It is | |
2295 | * called from the scsi stack directly. | |
2296 | */ | |
2297 | static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt, | |
2298 | void (*done)(struct scsi_cmnd *)) | |
2299 | { | |
2300 | struct scsi_id_instance_data *scsi_id = | |
2301 | (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; | |
2302 | struct sbp2scsi_host_info *hi; | |
abd559b1 | 2303 | int result = DID_NO_CONNECT << 16; |
1da177e4 | 2304 | |
d024ebc6 SR |
2305 | SBP2_DEBUG_ENTER(); |
2306 | #if (CONFIG_IEEE1394_SBP2_DEBUG >= 2) || defined(CONFIG_IEEE1394_SBP2_PACKET_DUMP) | |
2307 | scsi_print_command(SCpnt); | |
2308 | #endif | |
1da177e4 | 2309 | |
abd559b1 JM |
2310 | if (!sbp2util_node_is_available(scsi_id)) |
2311 | goto done; | |
1da177e4 LT |
2312 | |
2313 | hi = scsi_id->hi; | |
2314 | ||
2315 | if (!hi) { | |
2316 | SBP2_ERR("sbp2scsi_host_info is NULL - this is bad!"); | |
abd559b1 | 2317 | goto done; |
1da177e4 LT |
2318 | } |
2319 | ||
2320 | /* | |
2321 | * Until we handle multiple luns, just return selection time-out | |
2322 | * to any IO directed at non-zero LUNs | |
2323 | */ | |
abd559b1 JM |
2324 | if (SCpnt->device->lun) |
2325 | goto done; | |
1da177e4 LT |
2326 | |
2327 | /* | |
2328 | * Check for request sense command, and handle it here | |
2329 | * (autorequest sense) | |
2330 | */ | |
2331 | if (SCpnt->cmnd[0] == REQUEST_SENSE) { | |
2332 | SBP2_DEBUG("REQUEST_SENSE"); | |
2333 | memcpy(SCpnt->request_buffer, SCpnt->sense_buffer, SCpnt->request_bufflen); | |
2334 | memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer)); | |
2335 | sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_GOOD, SCpnt, done); | |
abd559b1 | 2336 | return 0; |
1da177e4 LT |
2337 | } |
2338 | ||
2339 | /* | |
2340 | * Check to see if we are in the middle of a bus reset. | |
2341 | */ | |
2342 | if (!hpsb_node_entry_valid(scsi_id->ne)) { | |
2343 | SBP2_ERR("Bus reset in progress - rejecting command"); | |
abd559b1 JM |
2344 | result = DID_BUS_BUSY << 16; |
2345 | goto done; | |
1da177e4 LT |
2346 | } |
2347 | ||
43863eba SR |
2348 | /* |
2349 | * Bidirectional commands are not yet implemented, | |
2350 | * and unknown transfer direction not handled. | |
2351 | */ | |
2352 | if (SCpnt->sc_data_direction == DMA_BIDIRECTIONAL) { | |
2353 | SBP2_ERR("Cannot handle DMA_BIDIRECTIONAL - rejecting command"); | |
2354 | result = DID_ERROR << 16; | |
2355 | goto done; | |
2356 | } | |
2357 | ||
1da177e4 LT |
2358 | /* |
2359 | * Try and send our SCSI command | |
2360 | */ | |
2361 | if (sbp2_send_command(scsi_id, SCpnt, done)) { | |
2362 | SBP2_ERR("Error sending SCSI command"); | |
2363 | sbp2scsi_complete_command(scsi_id, SBP2_SCSI_STATUS_SELECTION_TIMEOUT, | |
2364 | SCpnt, done); | |
2365 | } | |
abd559b1 | 2366 | return 0; |
1da177e4 | 2367 | |
abd559b1 JM |
2368 | done: |
2369 | SCpnt->result = result; | |
2370 | done(SCpnt); | |
2371 | return 0; | |
1da177e4 LT |
2372 | } |
2373 | ||
2374 | /* | |
2375 | * This function is called in order to complete all outstanding SBP-2 | |
2376 | * commands (in case of resets, etc.). | |
2377 | */ | |
2378 | static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id, | |
2379 | u32 status) | |
2380 | { | |
2381 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
2382 | struct list_head *lh; | |
2383 | struct sbp2_command_info *command; | |
79456197 | 2384 | unsigned long flags; |
1da177e4 | 2385 | |
d024ebc6 | 2386 | SBP2_DEBUG_ENTER(); |
1da177e4 | 2387 | |
79456197 | 2388 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2389 | while (!list_empty(&scsi_id->sbp2_command_orb_inuse)) { |
2390 | SBP2_DEBUG("Found pending command to complete"); | |
2391 | lh = scsi_id->sbp2_command_orb_inuse.next; | |
2392 | command = list_entry(lh, struct sbp2_command_info, list); | |
2393 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->command_orb_dma, | |
2394 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 2395 | PCI_DMA_TODEVICE); |
1da177e4 LT |
2396 | pci_dma_sync_single_for_cpu(hi->host->pdev, command->sge_dma, |
2397 | sizeof(command->scatter_gather_element), | |
2398 | PCI_DMA_BIDIRECTIONAL); | |
2399 | sbp2util_mark_command_completed(scsi_id, command); | |
2400 | if (command->Current_SCpnt) { | |
2401 | command->Current_SCpnt->result = status << 16; | |
2402 | command->Current_done(command->Current_SCpnt); | |
2403 | } | |
2404 | } | |
79456197 | 2405 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2406 | |
2407 | return; | |
2408 | } | |
2409 | ||
2410 | /* | |
2411 | * This function is called in order to complete a regular SBP-2 command. | |
2412 | * | |
2413 | * This can be called in interrupt context. | |
2414 | */ | |
2415 | static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id, | |
2416 | u32 scsi_status, struct scsi_cmnd *SCpnt, | |
2417 | void (*done)(struct scsi_cmnd *)) | |
2418 | { | |
d024ebc6 | 2419 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
2420 | |
2421 | /* | |
2422 | * Sanity | |
2423 | */ | |
2424 | if (!SCpnt) { | |
2425 | SBP2_ERR("SCpnt is NULL"); | |
2426 | return; | |
2427 | } | |
2428 | ||
2429 | /* | |
2430 | * If a bus reset is in progress and there was an error, don't | |
2431 | * complete the command, just let it get retried at the end of the | |
2432 | * bus reset. | |
2433 | */ | |
a237f35f SR |
2434 | if (!hpsb_node_entry_valid(scsi_id->ne) |
2435 | && (scsi_status != SBP2_SCSI_STATUS_GOOD)) { | |
1da177e4 LT |
2436 | SBP2_ERR("Bus reset in progress - retry command later"); |
2437 | return; | |
2438 | } | |
a237f35f | 2439 | |
1da177e4 LT |
2440 | /* |
2441 | * Switch on scsi status | |
2442 | */ | |
2443 | switch (scsi_status) { | |
a237f35f | 2444 | case SBP2_SCSI_STATUS_GOOD: |
8f0525ff | 2445 | SCpnt->result = DID_OK << 16; |
a237f35f | 2446 | break; |
1da177e4 | 2447 | |
a237f35f SR |
2448 | case SBP2_SCSI_STATUS_BUSY: |
2449 | SBP2_ERR("SBP2_SCSI_STATUS_BUSY"); | |
2450 | SCpnt->result = DID_BUS_BUSY << 16; | |
2451 | break; | |
1da177e4 | 2452 | |
a237f35f SR |
2453 | case SBP2_SCSI_STATUS_CHECK_CONDITION: |
2454 | SBP2_DEBUG("SBP2_SCSI_STATUS_CHECK_CONDITION"); | |
8f0525ff | 2455 | SCpnt->result = CHECK_CONDITION << 1 | DID_OK << 16; |
1da177e4 | 2456 | #if CONFIG_IEEE1394_SBP2_DEBUG >= 1 |
a237f35f | 2457 | scsi_print_command(SCpnt); |
d024ebc6 | 2458 | scsi_print_sense(SBP2_DEVICE_NAME, SCpnt); |
1da177e4 | 2459 | #endif |
a237f35f | 2460 | break; |
1da177e4 | 2461 | |
a237f35f SR |
2462 | case SBP2_SCSI_STATUS_SELECTION_TIMEOUT: |
2463 | SBP2_ERR("SBP2_SCSI_STATUS_SELECTION_TIMEOUT"); | |
2464 | SCpnt->result = DID_NO_CONNECT << 16; | |
2465 | scsi_print_command(SCpnt); | |
2466 | break; | |
1da177e4 | 2467 | |
a237f35f SR |
2468 | case SBP2_SCSI_STATUS_CONDITION_MET: |
2469 | case SBP2_SCSI_STATUS_RESERVATION_CONFLICT: | |
2470 | case SBP2_SCSI_STATUS_COMMAND_TERMINATED: | |
2471 | SBP2_ERR("Bad SCSI status = %x", scsi_status); | |
2472 | SCpnt->result = DID_ERROR << 16; | |
2473 | scsi_print_command(SCpnt); | |
2474 | break; | |
1da177e4 | 2475 | |
a237f35f SR |
2476 | default: |
2477 | SBP2_ERR("Unsupported SCSI status = %x", scsi_status); | |
2478 | SCpnt->result = DID_ERROR << 16; | |
1da177e4 LT |
2479 | } |
2480 | ||
1da177e4 LT |
2481 | /* |
2482 | * If a bus reset is in progress and there was an error, complete | |
2483 | * the command as busy so that it will get retried. | |
2484 | */ | |
a237f35f SR |
2485 | if (!hpsb_node_entry_valid(scsi_id->ne) |
2486 | && (scsi_status != SBP2_SCSI_STATUS_GOOD)) { | |
1da177e4 LT |
2487 | SBP2_ERR("Completing command with busy (bus reset)"); |
2488 | SCpnt->result = DID_BUS_BUSY << 16; | |
2489 | } | |
2490 | ||
2491 | /* | |
2492 | * If a unit attention occurs, return busy status so it gets | |
2493 | * retried... it could have happened because of a 1394 bus reset | |
2494 | * or hot-plug... | |
8f0525ff SR |
2495 | * XXX DID_BUS_BUSY is actually a bad idea because it will defy |
2496 | * the scsi layer's retry logic. | |
1da177e4 LT |
2497 | */ |
2498 | #if 0 | |
2499 | if ((scsi_status == SBP2_SCSI_STATUS_CHECK_CONDITION) && | |
2500 | (SCpnt->sense_buffer[2] == UNIT_ATTENTION)) { | |
2501 | SBP2_DEBUG("UNIT ATTENTION - return busy"); | |
2502 | SCpnt->result = DID_BUS_BUSY << 16; | |
2503 | } | |
2504 | #endif | |
2505 | ||
2506 | /* | |
2507 | * Tell scsi stack that we're done with this command | |
2508 | */ | |
a237f35f | 2509 | done(SCpnt); |
1da177e4 LT |
2510 | } |
2511 | ||
abd559b1 | 2512 | static int sbp2scsi_slave_alloc(struct scsi_device *sdev) |
1da177e4 | 2513 | { |
a80614d1 SR |
2514 | struct scsi_id_instance_data *scsi_id = |
2515 | (struct scsi_id_instance_data *)sdev->host->hostdata[0]; | |
2516 | ||
2517 | scsi_id->sdev = sdev; | |
2518 | ||
24d3bf88 | 2519 | if (scsi_id->workarounds & SBP2_WORKAROUND_INQUIRY_36) |
a80614d1 | 2520 | sdev->inquiry_len = 36; |
abd559b1 JM |
2521 | return 0; |
2522 | } | |
2523 | ||
abd559b1 JM |
2524 | static int sbp2scsi_slave_configure(struct scsi_device *sdev) |
2525 | { | |
24d3bf88 SR |
2526 | struct scsi_id_instance_data *scsi_id = |
2527 | (struct scsi_id_instance_data *)sdev->host->hostdata[0]; | |
2528 | ||
abd559b1 | 2529 | blk_queue_dma_alignment(sdev->request_queue, (512 - 1)); |
365c786f | 2530 | sdev->use_10_for_rw = 1; |
24d3bf88 SR |
2531 | |
2532 | if (sdev->type == TYPE_DISK && | |
2533 | scsi_id->workarounds & SBP2_WORKAROUND_MODE_SENSE_8) | |
2534 | sdev->skip_ms_page_8 = 1; | |
e9a1c52c SR |
2535 | if (scsi_id->workarounds & SBP2_WORKAROUND_FIX_CAPACITY) |
2536 | sdev->fix_capacity = 1; | |
31a379e1 SR |
2537 | if (scsi_id->ne->guid_vendor_id == 0x0010b9 && /* Maxtor's OUI */ |
2538 | (sdev->type == TYPE_DISK || sdev->type == TYPE_RBC)) | |
2539 | sdev->allow_restart = 1; | |
1da177e4 LT |
2540 | return 0; |
2541 | } | |
2542 | ||
abd559b1 JM |
2543 | static void sbp2scsi_slave_destroy(struct scsi_device *sdev) |
2544 | { | |
2545 | ((struct scsi_id_instance_data *)sdev->host->hostdata[0])->sdev = NULL; | |
2546 | return; | |
2547 | } | |
2548 | ||
1da177e4 LT |
2549 | /* |
2550 | * Called by scsi stack when something has really gone wrong. Usually | |
2551 | * called when a command has timed-out for some reason. | |
2552 | */ | |
2553 | static int sbp2scsi_abort(struct scsi_cmnd *SCpnt) | |
2554 | { | |
2555 | struct scsi_id_instance_data *scsi_id = | |
2556 | (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; | |
2557 | struct sbp2scsi_host_info *hi = scsi_id->hi; | |
2558 | struct sbp2_command_info *command; | |
24c7cd06 | 2559 | unsigned long flags; |
1da177e4 LT |
2560 | |
2561 | SBP2_ERR("aborting sbp2 command"); | |
2562 | scsi_print_command(SCpnt); | |
2563 | ||
abd559b1 | 2564 | if (sbp2util_node_is_available(scsi_id)) { |
1da177e4 LT |
2565 | |
2566 | /* | |
2567 | * Right now, just return any matching command structures | |
2568 | * to the free pool. | |
2569 | */ | |
24c7cd06 | 2570 | spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2571 | command = sbp2util_find_command_for_SCpnt(scsi_id, SCpnt); |
2572 | if (command) { | |
2573 | SBP2_DEBUG("Found command to abort"); | |
2574 | pci_dma_sync_single_for_cpu(hi->host->pdev, | |
2575 | command->command_orb_dma, | |
2576 | sizeof(struct sbp2_command_orb), | |
d4018d7f | 2577 | PCI_DMA_TODEVICE); |
1da177e4 LT |
2578 | pci_dma_sync_single_for_cpu(hi->host->pdev, |
2579 | command->sge_dma, | |
2580 | sizeof(command->scatter_gather_element), | |
2581 | PCI_DMA_BIDIRECTIONAL); | |
2582 | sbp2util_mark_command_completed(scsi_id, command); | |
2583 | if (command->Current_SCpnt) { | |
2584 | command->Current_SCpnt->result = DID_ABORT << 16; | |
2585 | command->Current_done(command->Current_SCpnt); | |
2586 | } | |
2587 | } | |
24c7cd06 | 2588 | spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags); |
1da177e4 LT |
2589 | |
2590 | /* | |
2591 | * Initiate a fetch agent reset. | |
2592 | */ | |
1f427e80 | 2593 | sbp2_agent_reset(scsi_id, 1); |
1da177e4 LT |
2594 | sbp2scsi_complete_all_commands(scsi_id, DID_BUS_BUSY); |
2595 | } | |
2596 | ||
a237f35f | 2597 | return SUCCESS; |
1da177e4 LT |
2598 | } |
2599 | ||
2600 | /* | |
2601 | * Called by scsi stack when something has really gone wrong. | |
2602 | */ | |
abd559b1 | 2603 | static int sbp2scsi_reset(struct scsi_cmnd *SCpnt) |
1da177e4 LT |
2604 | { |
2605 | struct scsi_id_instance_data *scsi_id = | |
2606 | (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; | |
2607 | ||
2608 | SBP2_ERR("reset requested"); | |
2609 | ||
abd559b1 | 2610 | if (sbp2util_node_is_available(scsi_id)) { |
1da177e4 | 2611 | SBP2_ERR("Generating sbp2 fetch agent reset"); |
1f427e80 | 2612 | sbp2_agent_reset(scsi_id, 1); |
1da177e4 LT |
2613 | } |
2614 | ||
abd559b1 | 2615 | return SUCCESS; |
94d0e7b8 JG |
2616 | } |
2617 | ||
a237f35f SR |
2618 | static ssize_t sbp2_sysfs_ieee1394_id_show(struct device *dev, |
2619 | struct device_attribute *attr, | |
2620 | char *buf) | |
1da177e4 LT |
2621 | { |
2622 | struct scsi_device *sdev; | |
2623 | struct scsi_id_instance_data *scsi_id; | |
2624 | int lun; | |
2625 | ||
2626 | if (!(sdev = to_scsi_device(dev))) | |
2627 | return 0; | |
2628 | ||
2629 | if (!(scsi_id = (struct scsi_id_instance_data *)sdev->host->hostdata[0])) | |
2630 | return 0; | |
2631 | ||
e309fc6d | 2632 | lun = ORB_SET_LUN(scsi_id->sbp2_lun); |
1da177e4 LT |
2633 | |
2634 | return sprintf(buf, "%016Lx:%d:%d\n", (unsigned long long)scsi_id->ne->guid, | |
2635 | scsi_id->ud->id, lun); | |
2636 | } | |
2637 | static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL); | |
2638 | ||
2639 | static struct device_attribute *sbp2_sysfs_sdev_attrs[] = { | |
2640 | &dev_attr_ieee1394_id, | |
2641 | NULL | |
2642 | }; | |
2643 | ||
2644 | MODULE_AUTHOR("Ben Collins <bcollins@debian.org>"); | |
2645 | MODULE_DESCRIPTION("IEEE-1394 SBP-2 protocol driver"); | |
2646 | MODULE_SUPPORTED_DEVICE(SBP2_DEVICE_NAME); | |
2647 | MODULE_LICENSE("GPL"); | |
2648 | ||
2649 | /* SCSI host template */ | |
2650 | static struct scsi_host_template scsi_driver_template = { | |
2651 | .module = THIS_MODULE, | |
2652 | .name = "SBP-2 IEEE-1394", | |
2653 | .proc_name = SBP2_DEVICE_NAME, | |
1da177e4 LT |
2654 | .queuecommand = sbp2scsi_queuecommand, |
2655 | .eh_abort_handler = sbp2scsi_abort, | |
2656 | .eh_device_reset_handler = sbp2scsi_reset, | |
abd559b1 | 2657 | .slave_alloc = sbp2scsi_slave_alloc, |
1da177e4 | 2658 | .slave_configure = sbp2scsi_slave_configure, |
abd559b1 | 2659 | .slave_destroy = sbp2scsi_slave_destroy, |
1da177e4 LT |
2660 | .this_id = -1, |
2661 | .sg_tablesize = SG_ALL, | |
2662 | .use_clustering = ENABLE_CLUSTERING, | |
2663 | .cmd_per_lun = SBP2_MAX_CMDS, | |
2664 | .can_queue = SBP2_MAX_CMDS, | |
2665 | .emulated = 1, | |
2666 | .sdev_attrs = sbp2_sysfs_sdev_attrs, | |
2667 | }; | |
2668 | ||
2669 | static int sbp2_module_init(void) | |
2670 | { | |
2671 | int ret; | |
2672 | ||
d024ebc6 | 2673 | SBP2_DEBUG_ENTER(); |
1da177e4 | 2674 | |
1da177e4 LT |
2675 | /* Module load debug option to force one command at a time (serializing I/O) */ |
2676 | if (serialize_io) { | |
2bab359a JM |
2677 | SBP2_INFO("Driver forced to serialize I/O (serialize_io=1)"); |
2678 | SBP2_INFO("Try serialize_io=0 for better performance"); | |
1da177e4 LT |
2679 | scsi_driver_template.can_queue = 1; |
2680 | scsi_driver_template.cmd_per_lun = 1; | |
2681 | } | |
2682 | ||
24d3bf88 SR |
2683 | if (sbp2_default_workarounds & SBP2_WORKAROUND_128K_MAX_TRANS && |
2684 | (max_sectors * 512) > (128 * 1024)) | |
2685 | max_sectors = 128 * 1024 / 512; | |
1da177e4 LT |
2686 | scsi_driver_template.max_sectors = max_sectors; |
2687 | ||
1da177e4 LT |
2688 | /* Register our high level driver with 1394 stack */ |
2689 | hpsb_register_highlevel(&sbp2_highlevel); | |
2690 | ||
2691 | ret = hpsb_register_protocol(&sbp2_driver); | |
2692 | if (ret) { | |
2693 | SBP2_ERR("Failed to register protocol"); | |
2694 | hpsb_unregister_highlevel(&sbp2_highlevel); | |
2695 | return ret; | |
2696 | } | |
2697 | ||
2698 | return 0; | |
2699 | } | |
2700 | ||
2701 | static void __exit sbp2_module_exit(void) | |
2702 | { | |
d024ebc6 | 2703 | SBP2_DEBUG_ENTER(); |
1da177e4 LT |
2704 | |
2705 | hpsb_unregister_protocol(&sbp2_driver); | |
2706 | ||
2707 | hpsb_unregister_highlevel(&sbp2_highlevel); | |
2708 | } | |
2709 | ||
2710 | module_init(sbp2_module_init); | |
2711 | module_exit(sbp2_module_exit); |