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1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * Parallel SCSI (SPI) transport specific attributes exported to sysfs. | |
4 | * | |
5 | * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved. | |
6 | * Copyright (c) 2004, 2005 James Bottomley <James.Bottomley@SteelEye.com> | |
1da177e4 LT |
7 | */ |
8 | #include <linux/ctype.h> | |
9 | #include <linux/init.h> | |
10 | #include <linux/module.h> | |
11 | #include <linux/workqueue.h> | |
949bf797 | 12 | #include <linux/blkdev.h> |
d158d261 | 13 | #include <linux/mutex.h> |
9f9a73b6 | 14 | #include <linux/sysfs.h> |
5a0e3ad6 | 15 | #include <linux/slab.h> |
203f8c25 | 16 | #include <linux/suspend.h> |
1da177e4 LT |
17 | #include <scsi/scsi.h> |
18 | #include "scsi_priv.h" | |
19 | #include <scsi/scsi_device.h> | |
20 | #include <scsi/scsi_host.h> | |
33aa687d | 21 | #include <scsi/scsi_cmnd.h> |
1da177e4 | 22 | #include <scsi/scsi_eh.h> |
50668633 | 23 | #include <scsi/scsi_tcq.h> |
1da177e4 LT |
24 | #include <scsi/scsi_transport.h> |
25 | #include <scsi/scsi_transport_spi.h> | |
26 | ||
d872ebe4 | 27 | #define SPI_NUM_ATTRS 14 /* increase this if you add attributes */ |
1da177e4 LT |
28 | #define SPI_OTHER_ATTRS 1 /* Increase this if you add "always |
29 | * on" attributes */ | |
30 | #define SPI_HOST_ATTRS 1 | |
31 | ||
32 | #define SPI_MAX_ECHO_BUFFER_SIZE 4096 | |
33 | ||
949bf797 JB |
34 | #define DV_LOOPS 3 |
35 | #define DV_TIMEOUT (10*HZ) | |
36 | #define DV_RETRIES 3 /* should only need at most | |
37 | * two cc/ua clears */ | |
38 | ||
a9e0edb6 JB |
39 | /* Our blacklist flags */ |
40 | enum { | |
093b8886 | 41 | SPI_BLIST_NOIUS = (__force blist_flags_t)0x1, |
a9e0edb6 JB |
42 | }; |
43 | ||
44 | /* blacklist table, modelled on scsi_devinfo.c */ | |
45 | static struct { | |
46 | char *vendor; | |
47 | char *model; | |
093b8886 | 48 | blist_flags_t flags; |
a9e0edb6 JB |
49 | } spi_static_device_list[] __initdata = { |
50 | {"HP", "Ultrium 3-SCSI", SPI_BLIST_NOIUS }, | |
51 | {"IBM", "ULTRIUM-TD3", SPI_BLIST_NOIUS }, | |
52 | {NULL, NULL, 0} | |
53 | }; | |
54 | ||
1da177e4 | 55 | /* Private data accessors (keep these out of the header file) */ |
dfdc58ba | 56 | #define spi_dv_in_progress(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dv_in_progress) |
d158d261 | 57 | #define spi_dv_mutex(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dv_mutex) |
1da177e4 LT |
58 | |
59 | struct spi_internal { | |
60 | struct scsi_transport_template t; | |
61 | struct spi_function_template *f; | |
1da177e4 LT |
62 | }; |
63 | ||
64 | #define to_spi_internal(tmpl) container_of(tmpl, struct spi_internal, t) | |
65 | ||
66 | static const int ppr_to_ps[] = { | |
67 | /* The PPR values 0-6 are reserved, fill them in when | |
68 | * the committee defines them */ | |
69 | -1, /* 0x00 */ | |
70 | -1, /* 0x01 */ | |
71 | -1, /* 0x02 */ | |
72 | -1, /* 0x03 */ | |
73 | -1, /* 0x04 */ | |
74 | -1, /* 0x05 */ | |
75 | -1, /* 0x06 */ | |
76 | 3125, /* 0x07 */ | |
77 | 6250, /* 0x08 */ | |
78 | 12500, /* 0x09 */ | |
79 | 25000, /* 0x0a */ | |
80 | 30300, /* 0x0b */ | |
81 | 50000, /* 0x0c */ | |
82 | }; | |
83 | /* The PPR values at which you calculate the period in ns by multiplying | |
84 | * by 4 */ | |
85 | #define SPI_STATIC_PPR 0x0c | |
86 | ||
87 | static int sprint_frac(char *dest, int value, int denom) | |
88 | { | |
89 | int frac = value % denom; | |
90 | int result = sprintf(dest, "%d", value / denom); | |
91 | ||
92 | if (frac == 0) | |
93 | return result; | |
94 | dest[result++] = '.'; | |
95 | ||
96 | do { | |
97 | denom /= 10; | |
98 | sprintf(dest + result, "%d", frac / denom); | |
99 | result++; | |
100 | frac %= denom; | |
101 | } while (frac); | |
102 | ||
103 | dest[result++] = '\0'; | |
104 | return result; | |
105 | } | |
106 | ||
33aa687d | 107 | static int spi_execute(struct scsi_device *sdev, const void *cmd, |
c9ee828a | 108 | enum req_op op, void *buffer, unsigned int bufflen, |
33aa687d | 109 | struct scsi_sense_hdr *sshdr) |
949bf797 | 110 | { |
33aa687d | 111 | int i, result; |
76aaf87b | 112 | struct scsi_sense_hdr sshdr_tmp; |
c9ee828a MC |
113 | blk_opf_t opf = op | REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | |
114 | REQ_FAILFAST_DRIVER; | |
115 | const struct scsi_exec_args exec_args = { | |
116 | .req_flags = BLK_MQ_REQ_PM, | |
117 | .sshdr = sshdr ? : &sshdr_tmp, | |
118 | }; | |
76aaf87b | 119 | |
c9ee828a | 120 | sshdr = exec_args.sshdr; |
949bf797 JB |
121 | |
122 | for(i = 0; i < DV_RETRIES; i++) { | |
cfefd9f8 BVA |
123 | /* |
124 | * The purpose of the RQF_PM flag below is to bypass the | |
125 | * SDEV_QUIESCE state. | |
126 | */ | |
c9ee828a MC |
127 | result = scsi_execute_cmd(sdev, cmd, opf, buffer, bufflen, |
128 | DV_TIMEOUT, 1, &exec_args); | |
464a00c9 | 129 | if (result < 0 || !scsi_sense_valid(sshdr) || |
76aaf87b CH |
130 | sshdr->sense_key != UNIT_ATTENTION) |
131 | break; | |
949bf797 | 132 | } |
33aa687d | 133 | return result; |
949bf797 JB |
134 | } |
135 | ||
1da177e4 LT |
136 | static struct { |
137 | enum spi_signal_type value; | |
138 | char *name; | |
139 | } signal_types[] = { | |
140 | { SPI_SIGNAL_UNKNOWN, "unknown" }, | |
141 | { SPI_SIGNAL_SE, "SE" }, | |
142 | { SPI_SIGNAL_LVD, "LVD" }, | |
143 | { SPI_SIGNAL_HVD, "HVD" }, | |
144 | }; | |
145 | ||
146 | static inline const char *spi_signal_to_string(enum spi_signal_type type) | |
147 | { | |
148 | int i; | |
149 | ||
6391a113 | 150 | for (i = 0; i < ARRAY_SIZE(signal_types); i++) { |
1da177e4 LT |
151 | if (type == signal_types[i].value) |
152 | return signal_types[i].name; | |
153 | } | |
154 | return NULL; | |
155 | } | |
156 | static inline enum spi_signal_type spi_signal_to_value(const char *name) | |
157 | { | |
158 | int i, len; | |
159 | ||
6391a113 | 160 | for (i = 0; i < ARRAY_SIZE(signal_types); i++) { |
1da177e4 LT |
161 | len = strlen(signal_types[i].name); |
162 | if (strncmp(name, signal_types[i].name, len) == 0 && | |
163 | (name[len] == '\n' || name[len] == '\0')) | |
164 | return signal_types[i].value; | |
165 | } | |
166 | return SPI_SIGNAL_UNKNOWN; | |
167 | } | |
168 | ||
d0a7e574 | 169 | static int spi_host_setup(struct transport_container *tc, struct device *dev, |
ee959b00 | 170 | struct device *cdev) |
1da177e4 LT |
171 | { |
172 | struct Scsi_Host *shost = dev_to_shost(dev); | |
173 | ||
174 | spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; | |
175 | ||
176 | return 0; | |
177 | } | |
178 | ||
9b161a4d JB |
179 | static int spi_host_configure(struct transport_container *tc, |
180 | struct device *dev, | |
ee959b00 | 181 | struct device *cdev); |
9b161a4d | 182 | |
1da177e4 LT |
183 | static DECLARE_TRANSPORT_CLASS(spi_host_class, |
184 | "spi_host", | |
185 | spi_host_setup, | |
186 | NULL, | |
9b161a4d | 187 | spi_host_configure); |
1da177e4 LT |
188 | |
189 | static int spi_host_match(struct attribute_container *cont, | |
190 | struct device *dev) | |
191 | { | |
192 | struct Scsi_Host *shost; | |
1da177e4 LT |
193 | |
194 | if (!scsi_is_host_device(dev)) | |
195 | return 0; | |
196 | ||
197 | shost = dev_to_shost(dev); | |
198 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
199 | != &spi_host_class.class) | |
200 | return 0; | |
201 | ||
9b161a4d | 202 | return &shost->transportt->host_attrs.ac == cont; |
1da177e4 LT |
203 | } |
204 | ||
9b161a4d JB |
205 | static int spi_target_configure(struct transport_container *tc, |
206 | struct device *dev, | |
ee959b00 | 207 | struct device *cdev); |
9b161a4d | 208 | |
d0a7e574 JB |
209 | static int spi_device_configure(struct transport_container *tc, |
210 | struct device *dev, | |
ee959b00 | 211 | struct device *cdev) |
1da177e4 LT |
212 | { |
213 | struct scsi_device *sdev = to_scsi_device(dev); | |
214 | struct scsi_target *starget = sdev->sdev_target; | |
093b8886 BVA |
215 | blist_flags_t bflags; |
216 | ||
217 | bflags = scsi_get_device_flags_keyed(sdev, &sdev->inquiry[8], | |
218 | &sdev->inquiry[16], | |
219 | SCSI_DEVINFO_SPI); | |
1da177e4 LT |
220 | |
221 | /* Populate the target capability fields with the values | |
222 | * gleaned from the device inquiry */ | |
223 | ||
224 | spi_support_sync(starget) = scsi_device_sync(sdev); | |
225 | spi_support_wide(starget) = scsi_device_wide(sdev); | |
226 | spi_support_dt(starget) = scsi_device_dt(sdev); | |
227 | spi_support_dt_only(starget) = scsi_device_dt_only(sdev); | |
228 | spi_support_ius(starget) = scsi_device_ius(sdev); | |
a9e0edb6 JB |
229 | if (bflags & SPI_BLIST_NOIUS) { |
230 | dev_info(dev, "Information Units disabled by blacklist\n"); | |
231 | spi_support_ius(starget) = 0; | |
232 | } | |
1da177e4 LT |
233 | spi_support_qas(starget) = scsi_device_qas(sdev); |
234 | ||
235 | return 0; | |
236 | } | |
237 | ||
d0a7e574 JB |
238 | static int spi_setup_transport_attrs(struct transport_container *tc, |
239 | struct device *dev, | |
ee959b00 | 240 | struct device *cdev) |
1da177e4 LT |
241 | { |
242 | struct scsi_target *starget = to_scsi_target(dev); | |
243 | ||
244 | spi_period(starget) = -1; /* illegal value */ | |
62a86129 | 245 | spi_min_period(starget) = 0; |
1da177e4 | 246 | spi_offset(starget) = 0; /* async */ |
62a86129 | 247 | spi_max_offset(starget) = 255; |
1da177e4 | 248 | spi_width(starget) = 0; /* narrow */ |
62a86129 | 249 | spi_max_width(starget) = 1; |
1da177e4 | 250 | spi_iu(starget) = 0; /* no IU */ |
ea443190 | 251 | spi_max_iu(starget) = 1; |
1da177e4 LT |
252 | spi_dt(starget) = 0; /* ST */ |
253 | spi_qas(starget) = 0; | |
ea443190 | 254 | spi_max_qas(starget) = 1; |
1da177e4 LT |
255 | spi_wr_flow(starget) = 0; |
256 | spi_rd_strm(starget) = 0; | |
257 | spi_rti(starget) = 0; | |
258 | spi_pcomp_en(starget) = 0; | |
d872ebe4 | 259 | spi_hold_mcs(starget) = 0; |
1da177e4 | 260 | spi_dv_pending(starget) = 0; |
dfdc58ba | 261 | spi_dv_in_progress(starget) = 0; |
1da177e4 | 262 | spi_initial_dv(starget) = 0; |
d158d261 | 263 | mutex_init(&spi_dv_mutex(starget)); |
1da177e4 LT |
264 | |
265 | return 0; | |
266 | } | |
267 | ||
62a86129 JB |
268 | #define spi_transport_show_simple(field, format_string) \ |
269 | \ | |
270 | static ssize_t \ | |
ee959b00 TJ |
271 | show_spi_transport_##field(struct device *dev, \ |
272 | struct device_attribute *attr, char *buf) \ | |
62a86129 | 273 | { \ |
ee959b00 | 274 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
62a86129 JB |
275 | struct spi_transport_attrs *tp; \ |
276 | \ | |
277 | tp = (struct spi_transport_attrs *)&starget->starget_data; \ | |
278 | return snprintf(buf, 20, format_string, tp->field); \ | |
279 | } | |
280 | ||
281 | #define spi_transport_store_simple(field, format_string) \ | |
282 | \ | |
283 | static ssize_t \ | |
ee959b00 TJ |
284 | store_spi_transport_##field(struct device *dev, \ |
285 | struct device_attribute *attr, \ | |
286 | const char *buf, size_t count) \ | |
62a86129 JB |
287 | { \ |
288 | int val; \ | |
ee959b00 | 289 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
62a86129 JB |
290 | struct spi_transport_attrs *tp; \ |
291 | \ | |
292 | tp = (struct spi_transport_attrs *)&starget->starget_data; \ | |
293 | val = simple_strtoul(buf, NULL, 0); \ | |
294 | tp->field = val; \ | |
295 | return count; \ | |
296 | } | |
297 | ||
1da177e4 LT |
298 | #define spi_transport_show_function(field, format_string) \ |
299 | \ | |
300 | static ssize_t \ | |
ee959b00 TJ |
301 | show_spi_transport_##field(struct device *dev, \ |
302 | struct device_attribute *attr, char *buf) \ | |
1da177e4 | 303 | { \ |
ee959b00 | 304 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
1da177e4 LT |
305 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ |
306 | struct spi_transport_attrs *tp; \ | |
307 | struct spi_internal *i = to_spi_internal(shost->transportt); \ | |
308 | tp = (struct spi_transport_attrs *)&starget->starget_data; \ | |
309 | if (i->f->get_##field) \ | |
310 | i->f->get_##field(starget); \ | |
311 | return snprintf(buf, 20, format_string, tp->field); \ | |
312 | } | |
313 | ||
314 | #define spi_transport_store_function(field, format_string) \ | |
315 | static ssize_t \ | |
ee959b00 TJ |
316 | store_spi_transport_##field(struct device *dev, \ |
317 | struct device_attribute *attr, \ | |
318 | const char *buf, size_t count) \ | |
1da177e4 LT |
319 | { \ |
320 | int val; \ | |
ee959b00 | 321 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
1da177e4 LT |
322 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ |
323 | struct spi_internal *i = to_spi_internal(shost->transportt); \ | |
324 | \ | |
9b161a4d JB |
325 | if (!i->f->set_##field) \ |
326 | return -EINVAL; \ | |
1da177e4 | 327 | val = simple_strtoul(buf, NULL, 0); \ |
9b161a4d | 328 | i->f->set_##field(starget, val); \ |
62a86129 JB |
329 | return count; \ |
330 | } | |
331 | ||
332 | #define spi_transport_store_max(field, format_string) \ | |
333 | static ssize_t \ | |
ee959b00 TJ |
334 | store_spi_transport_##field(struct device *dev, \ |
335 | struct device_attribute *attr, \ | |
336 | const char *buf, size_t count) \ | |
62a86129 JB |
337 | { \ |
338 | int val; \ | |
ee959b00 | 339 | struct scsi_target *starget = transport_class_to_starget(dev); \ |
62a86129 JB |
340 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ |
341 | struct spi_internal *i = to_spi_internal(shost->transportt); \ | |
342 | struct spi_transport_attrs *tp \ | |
343 | = (struct spi_transport_attrs *)&starget->starget_data; \ | |
344 | \ | |
5aee52c4 | 345 | if (!i->f->set_##field) \ |
9b161a4d | 346 | return -EINVAL; \ |
62a86129 JB |
347 | val = simple_strtoul(buf, NULL, 0); \ |
348 | if (val > tp->max_##field) \ | |
349 | val = tp->max_##field; \ | |
1da177e4 LT |
350 | i->f->set_##field(starget, val); \ |
351 | return count; \ | |
352 | } | |
353 | ||
354 | #define spi_transport_rd_attr(field, format_string) \ | |
355 | spi_transport_show_function(field, format_string) \ | |
356 | spi_transport_store_function(field, format_string) \ | |
ee959b00 TJ |
357 | static DEVICE_ATTR(field, S_IRUGO, \ |
358 | show_spi_transport_##field, \ | |
359 | store_spi_transport_##field); | |
1da177e4 | 360 | |
62a86129 JB |
361 | #define spi_transport_simple_attr(field, format_string) \ |
362 | spi_transport_show_simple(field, format_string) \ | |
363 | spi_transport_store_simple(field, format_string) \ | |
ee959b00 TJ |
364 | static DEVICE_ATTR(field, S_IRUGO, \ |
365 | show_spi_transport_##field, \ | |
366 | store_spi_transport_##field); | |
62a86129 JB |
367 | |
368 | #define spi_transport_max_attr(field, format_string) \ | |
369 | spi_transport_show_function(field, format_string) \ | |
370 | spi_transport_store_max(field, format_string) \ | |
371 | spi_transport_simple_attr(max_##field, format_string) \ | |
ee959b00 TJ |
372 | static DEVICE_ATTR(field, S_IRUGO, \ |
373 | show_spi_transport_##field, \ | |
374 | store_spi_transport_##field); | |
62a86129 | 375 | |
1da177e4 | 376 | /* The Parallel SCSI Tranport Attributes: */ |
62a86129 JB |
377 | spi_transport_max_attr(offset, "%d\n"); |
378 | spi_transport_max_attr(width, "%d\n"); | |
ea443190 | 379 | spi_transport_max_attr(iu, "%d\n"); |
1da177e4 | 380 | spi_transport_rd_attr(dt, "%d\n"); |
ea443190 | 381 | spi_transport_max_attr(qas, "%d\n"); |
1da177e4 LT |
382 | spi_transport_rd_attr(wr_flow, "%d\n"); |
383 | spi_transport_rd_attr(rd_strm, "%d\n"); | |
384 | spi_transport_rd_attr(rti, "%d\n"); | |
385 | spi_transport_rd_attr(pcomp_en, "%d\n"); | |
d872ebe4 | 386 | spi_transport_rd_attr(hold_mcs, "%d\n"); |
1da177e4 | 387 | |
e8bac9e0 JB |
388 | /* we only care about the first child device that's a real SCSI device |
389 | * so we return 1 to terminate the iteration when we find it */ | |
9a881f16 | 390 | static int child_iter(struct device *dev, void *data) |
391 | { | |
e8bac9e0 JB |
392 | if (!scsi_is_sdev_device(dev)) |
393 | return 0; | |
9a881f16 | 394 | |
e8bac9e0 | 395 | spi_dv_device(to_scsi_device(dev)); |
9a881f16 | 396 | return 1; |
397 | } | |
398 | ||
1da177e4 | 399 | static ssize_t |
ee959b00 TJ |
400 | store_spi_revalidate(struct device *dev, struct device_attribute *attr, |
401 | const char *buf, size_t count) | |
1da177e4 | 402 | { |
ee959b00 | 403 | struct scsi_target *starget = transport_class_to_starget(dev); |
1da177e4 | 404 | |
9a881f16 | 405 | device_for_each_child(&starget->dev, NULL, child_iter); |
1da177e4 LT |
406 | return count; |
407 | } | |
ee959b00 | 408 | static DEVICE_ATTR(revalidate, S_IWUSR, NULL, store_spi_revalidate); |
1da177e4 LT |
409 | |
410 | /* Translate the period into ns according to the current spec | |
411 | * for SDTR/PPR messages */ | |
ef72582e | 412 | static int period_to_str(char *buf, int period) |
1da177e4 | 413 | { |
1da177e4 | 414 | int len, picosec; |
1da177e4 | 415 | |
62a86129 | 416 | if (period < 0 || period > 0xff) { |
1da177e4 | 417 | picosec = -1; |
62a86129 JB |
418 | } else if (period <= SPI_STATIC_PPR) { |
419 | picosec = ppr_to_ps[period]; | |
1da177e4 | 420 | } else { |
62a86129 | 421 | picosec = period * 4000; |
1da177e4 LT |
422 | } |
423 | ||
424 | if (picosec == -1) { | |
425 | len = sprintf(buf, "reserved"); | |
426 | } else { | |
427 | len = sprint_frac(buf, picosec, 1000); | |
428 | } | |
429 | ||
ef72582e MW |
430 | return len; |
431 | } | |
432 | ||
433 | static ssize_t | |
ea697e45 | 434 | show_spi_transport_period_helper(char *buf, int period) |
ef72582e MW |
435 | { |
436 | int len = period_to_str(buf, period); | |
1da177e4 LT |
437 | buf[len++] = '\n'; |
438 | buf[len] = '\0'; | |
439 | return len; | |
440 | } | |
441 | ||
442 | static ssize_t | |
ee959b00 | 443 | store_spi_transport_period_helper(struct device *dev, const char *buf, |
62a86129 | 444 | size_t count, int *periodp) |
1da177e4 | 445 | { |
1da177e4 LT |
446 | int j, picosec, period = -1; |
447 | char *endp; | |
448 | ||
449 | picosec = simple_strtoul(buf, &endp, 10) * 1000; | |
450 | if (*endp == '.') { | |
451 | int mult = 100; | |
452 | do { | |
453 | endp++; | |
454 | if (!isdigit(*endp)) | |
455 | break; | |
456 | picosec += (*endp - '0') * mult; | |
457 | mult /= 10; | |
458 | } while (mult > 0); | |
459 | } | |
460 | ||
461 | for (j = 0; j <= SPI_STATIC_PPR; j++) { | |
462 | if (ppr_to_ps[j] < picosec) | |
463 | continue; | |
464 | period = j; | |
465 | break; | |
466 | } | |
467 | ||
468 | if (period == -1) | |
469 | period = picosec / 4000; | |
470 | ||
471 | if (period > 0xff) | |
472 | period = 0xff; | |
473 | ||
62a86129 | 474 | *periodp = period; |
1da177e4 LT |
475 | |
476 | return count; | |
477 | } | |
478 | ||
62a86129 | 479 | static ssize_t |
ee959b00 TJ |
480 | show_spi_transport_period(struct device *dev, |
481 | struct device_attribute *attr, char *buf) | |
62a86129 | 482 | { |
ee959b00 | 483 | struct scsi_target *starget = transport_class_to_starget(dev); |
62a86129 JB |
484 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
485 | struct spi_internal *i = to_spi_internal(shost->transportt); | |
486 | struct spi_transport_attrs *tp = | |
487 | (struct spi_transport_attrs *)&starget->starget_data; | |
488 | ||
489 | if (i->f->get_period) | |
490 | i->f->get_period(starget); | |
491 | ||
ea697e45 | 492 | return show_spi_transport_period_helper(buf, tp->period); |
62a86129 JB |
493 | } |
494 | ||
495 | static ssize_t | |
ee959b00 TJ |
496 | store_spi_transport_period(struct device *cdev, struct device_attribute *attr, |
497 | const char *buf, size_t count) | |
62a86129 JB |
498 | { |
499 | struct scsi_target *starget = transport_class_to_starget(cdev); | |
500 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
501 | struct spi_internal *i = to_spi_internal(shost->transportt); | |
502 | struct spi_transport_attrs *tp = | |
503 | (struct spi_transport_attrs *)&starget->starget_data; | |
504 | int period, retval; | |
505 | ||
9b161a4d JB |
506 | if (!i->f->set_period) |
507 | return -EINVAL; | |
508 | ||
62a86129 JB |
509 | retval = store_spi_transport_period_helper(cdev, buf, count, &period); |
510 | ||
511 | if (period < tp->min_period) | |
512 | period = tp->min_period; | |
513 | ||
514 | i->f->set_period(starget, period); | |
515 | ||
516 | return retval; | |
517 | } | |
518 | ||
ee959b00 TJ |
519 | static DEVICE_ATTR(period, S_IRUGO, |
520 | show_spi_transport_period, | |
521 | store_spi_transport_period); | |
1da177e4 | 522 | |
62a86129 | 523 | static ssize_t |
ee959b00 TJ |
524 | show_spi_transport_min_period(struct device *cdev, |
525 | struct device_attribute *attr, char *buf) | |
62a86129 JB |
526 | { |
527 | struct scsi_target *starget = transport_class_to_starget(cdev); | |
9b161a4d JB |
528 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
529 | struct spi_internal *i = to_spi_internal(shost->transportt); | |
62a86129 JB |
530 | struct spi_transport_attrs *tp = |
531 | (struct spi_transport_attrs *)&starget->starget_data; | |
532 | ||
9b161a4d JB |
533 | if (!i->f->set_period) |
534 | return -EINVAL; | |
535 | ||
ea697e45 | 536 | return show_spi_transport_period_helper(buf, tp->min_period); |
62a86129 JB |
537 | } |
538 | ||
539 | static ssize_t | |
ee959b00 TJ |
540 | store_spi_transport_min_period(struct device *cdev, |
541 | struct device_attribute *attr, | |
542 | const char *buf, size_t count) | |
62a86129 JB |
543 | { |
544 | struct scsi_target *starget = transport_class_to_starget(cdev); | |
545 | struct spi_transport_attrs *tp = | |
546 | (struct spi_transport_attrs *)&starget->starget_data; | |
547 | ||
548 | return store_spi_transport_period_helper(cdev, buf, count, | |
549 | &tp->min_period); | |
550 | } | |
551 | ||
552 | ||
ee959b00 TJ |
553 | static DEVICE_ATTR(min_period, S_IRUGO, |
554 | show_spi_transport_min_period, | |
555 | store_spi_transport_min_period); | |
62a86129 JB |
556 | |
557 | ||
ee959b00 TJ |
558 | static ssize_t show_spi_host_signalling(struct device *cdev, |
559 | struct device_attribute *attr, | |
560 | char *buf) | |
1da177e4 LT |
561 | { |
562 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
563 | struct spi_internal *i = to_spi_internal(shost->transportt); | |
564 | ||
565 | if (i->f->get_signalling) | |
566 | i->f->get_signalling(shost); | |
567 | ||
568 | return sprintf(buf, "%s\n", spi_signal_to_string(spi_signalling(shost))); | |
569 | } | |
ee959b00 TJ |
570 | static ssize_t store_spi_host_signalling(struct device *dev, |
571 | struct device_attribute *attr, | |
1da177e4 LT |
572 | const char *buf, size_t count) |
573 | { | |
ee959b00 | 574 | struct Scsi_Host *shost = transport_class_to_shost(dev); |
1da177e4 LT |
575 | struct spi_internal *i = to_spi_internal(shost->transportt); |
576 | enum spi_signal_type type = spi_signal_to_value(buf); | |
577 | ||
9b161a4d JB |
578 | if (!i->f->set_signalling) |
579 | return -EINVAL; | |
580 | ||
1da177e4 LT |
581 | if (type != SPI_SIGNAL_UNKNOWN) |
582 | i->f->set_signalling(shost, type); | |
583 | ||
584 | return count; | |
585 | } | |
ee959b00 TJ |
586 | static DEVICE_ATTR(signalling, S_IRUGO, |
587 | show_spi_host_signalling, | |
588 | store_spi_host_signalling); | |
1da177e4 | 589 | |
0ac2377b HR |
590 | static ssize_t show_spi_host_width(struct device *cdev, |
591 | struct device_attribute *attr, | |
592 | char *buf) | |
593 | { | |
594 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
595 | ||
596 | return sprintf(buf, "%s\n", shost->max_id == 16 ? "wide" : "narrow"); | |
597 | } | |
598 | static DEVICE_ATTR(host_width, S_IRUGO, | |
599 | show_spi_host_width, NULL); | |
600 | ||
601 | static ssize_t show_spi_host_hba_id(struct device *cdev, | |
602 | struct device_attribute *attr, | |
603 | char *buf) | |
604 | { | |
605 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
606 | ||
607 | return sprintf(buf, "%d\n", shost->this_id); | |
608 | } | |
609 | static DEVICE_ATTR(hba_id, S_IRUGO, | |
610 | show_spi_host_hba_id, NULL); | |
611 | ||
1da177e4 LT |
612 | #define DV_SET(x, y) \ |
613 | if(i->f->set_##x) \ | |
614 | i->f->set_##x(sdev->sdev_target, y) | |
615 | ||
1da177e4 LT |
616 | enum spi_compare_returns { |
617 | SPI_COMPARE_SUCCESS, | |
618 | SPI_COMPARE_FAILURE, | |
619 | SPI_COMPARE_SKIP_TEST, | |
620 | }; | |
621 | ||
622 | ||
623 | /* This is for read/write Domain Validation: If the device supports | |
624 | * an echo buffer, we do read/write tests to it */ | |
625 | static enum spi_compare_returns | |
33aa687d | 626 | spi_dv_device_echo_buffer(struct scsi_device *sdev, u8 *buffer, |
1da177e4 LT |
627 | u8 *ptr, const int retries) |
628 | { | |
1da177e4 | 629 | int len = ptr - buffer; |
33aa687d | 630 | int j, k, r, result; |
1da177e4 | 631 | unsigned int pattern = 0x0000ffff; |
33aa687d | 632 | struct scsi_sense_hdr sshdr; |
1da177e4 LT |
633 | |
634 | const char spi_write_buffer[] = { | |
635 | WRITE_BUFFER, 0x0a, 0, 0, 0, 0, 0, len >> 8, len & 0xff, 0 | |
636 | }; | |
637 | const char spi_read_buffer[] = { | |
638 | READ_BUFFER, 0x0a, 0, 0, 0, 0, 0, len >> 8, len & 0xff, 0 | |
639 | }; | |
640 | ||
641 | /* set up the pattern buffer. Doesn't matter if we spill | |
642 | * slightly beyond since that's where the read buffer is */ | |
643 | for (j = 0; j < len; ) { | |
644 | ||
645 | /* fill the buffer with counting (test a) */ | |
646 | for ( ; j < min(len, 32); j++) | |
647 | buffer[j] = j; | |
648 | k = j; | |
649 | /* fill the buffer with alternating words of 0x0 and | |
650 | * 0xffff (test b) */ | |
651 | for ( ; j < min(len, k + 32); j += 2) { | |
652 | u16 *word = (u16 *)&buffer[j]; | |
653 | ||
654 | *word = (j & 0x02) ? 0x0000 : 0xffff; | |
655 | } | |
656 | k = j; | |
657 | /* fill with crosstalk (alternating 0x5555 0xaaa) | |
658 | * (test c) */ | |
659 | for ( ; j < min(len, k + 32); j += 2) { | |
660 | u16 *word = (u16 *)&buffer[j]; | |
661 | ||
662 | *word = (j & 0x02) ? 0x5555 : 0xaaaa; | |
663 | } | |
664 | k = j; | |
665 | /* fill with shifting bits (test d) */ | |
666 | for ( ; j < min(len, k + 32); j += 4) { | |
667 | u32 *word = (unsigned int *)&buffer[j]; | |
668 | u32 roll = (pattern & 0x80000000) ? 1 : 0; | |
669 | ||
670 | *word = pattern; | |
671 | pattern = (pattern << 1) | roll; | |
672 | } | |
673 | /* don't bother with random data (test e) */ | |
674 | } | |
675 | ||
676 | for (r = 0; r < retries; r++) { | |
c9ee828a | 677 | result = spi_execute(sdev, spi_write_buffer, REQ_OP_DRV_OUT, |
33aa687d JB |
678 | buffer, len, &sshdr); |
679 | if(result || !scsi_device_online(sdev)) { | |
1da177e4 LT |
680 | |
681 | scsi_device_set_state(sdev, SDEV_QUIESCE); | |
33aa687d | 682 | if (scsi_sense_valid(&sshdr) |
1da177e4 LT |
683 | && sshdr.sense_key == ILLEGAL_REQUEST |
684 | /* INVALID FIELD IN CDB */ | |
685 | && sshdr.asc == 0x24 && sshdr.ascq == 0x00) | |
686 | /* This would mean that the drive lied | |
687 | * to us about supporting an echo | |
688 | * buffer (unfortunately some Western | |
689 | * Digital drives do precisely this) | |
690 | */ | |
691 | return SPI_COMPARE_SKIP_TEST; | |
692 | ||
693 | ||
9ccfc756 | 694 | sdev_printk(KERN_ERR, sdev, "Write Buffer failure %x\n", result); |
1da177e4 LT |
695 | return SPI_COMPARE_FAILURE; |
696 | } | |
697 | ||
698 | memset(ptr, 0, len); | |
c9ee828a | 699 | spi_execute(sdev, spi_read_buffer, REQ_OP_DRV_IN, |
33aa687d | 700 | ptr, len, NULL); |
1da177e4 LT |
701 | scsi_device_set_state(sdev, SDEV_QUIESCE); |
702 | ||
703 | if (memcmp(buffer, ptr, len) != 0) | |
704 | return SPI_COMPARE_FAILURE; | |
705 | } | |
706 | return SPI_COMPARE_SUCCESS; | |
707 | } | |
708 | ||
709 | /* This is for the simplest form of Domain Validation: a read test | |
710 | * on the inquiry data from the device */ | |
711 | static enum spi_compare_returns | |
33aa687d | 712 | spi_dv_device_compare_inquiry(struct scsi_device *sdev, u8 *buffer, |
1da177e4 LT |
713 | u8 *ptr, const int retries) |
714 | { | |
33aa687d JB |
715 | int r, result; |
716 | const int len = sdev->inquiry_len; | |
1da177e4 LT |
717 | const char spi_inquiry[] = { |
718 | INQUIRY, 0, 0, 0, len, 0 | |
719 | }; | |
720 | ||
721 | for (r = 0; r < retries; r++) { | |
1da177e4 LT |
722 | memset(ptr, 0, len); |
723 | ||
c9ee828a | 724 | result = spi_execute(sdev, spi_inquiry, REQ_OP_DRV_IN, |
33aa687d | 725 | ptr, len, NULL); |
1da177e4 | 726 | |
33aa687d | 727 | if(result || !scsi_device_online(sdev)) { |
1da177e4 LT |
728 | scsi_device_set_state(sdev, SDEV_QUIESCE); |
729 | return SPI_COMPARE_FAILURE; | |
730 | } | |
731 | ||
732 | /* If we don't have the inquiry data already, the | |
733 | * first read gets it */ | |
734 | if (ptr == buffer) { | |
735 | ptr += len; | |
736 | --r; | |
737 | continue; | |
738 | } | |
739 | ||
740 | if (memcmp(buffer, ptr, len) != 0) | |
741 | /* failure */ | |
742 | return SPI_COMPARE_FAILURE; | |
743 | } | |
744 | return SPI_COMPARE_SUCCESS; | |
745 | } | |
746 | ||
747 | static enum spi_compare_returns | |
33aa687d | 748 | spi_dv_retrain(struct scsi_device *sdev, u8 *buffer, u8 *ptr, |
1da177e4 | 749 | enum spi_compare_returns |
33aa687d | 750 | (*compare_fn)(struct scsi_device *, u8 *, u8 *, int)) |
1da177e4 | 751 | { |
33aa687d | 752 | struct spi_internal *i = to_spi_internal(sdev->host->transportt); |
9a8bc9b8 | 753 | struct scsi_target *starget = sdev->sdev_target; |
1da177e4 LT |
754 | int period = 0, prevperiod = 0; |
755 | enum spi_compare_returns retval; | |
756 | ||
757 | ||
758 | for (;;) { | |
759 | int newperiod; | |
33aa687d | 760 | retval = compare_fn(sdev, buffer, ptr, DV_LOOPS); |
1da177e4 LT |
761 | |
762 | if (retval == SPI_COMPARE_SUCCESS | |
763 | || retval == SPI_COMPARE_SKIP_TEST) | |
764 | break; | |
765 | ||
766 | /* OK, retrain, fallback */ | |
9a8bc9b8 JB |
767 | if (i->f->get_iu) |
768 | i->f->get_iu(starget); | |
769 | if (i->f->get_qas) | |
770 | i->f->get_qas(starget); | |
1da177e4 LT |
771 | if (i->f->get_period) |
772 | i->f->get_period(sdev->sdev_target); | |
9a8bc9b8 JB |
773 | |
774 | /* Here's the fallback sequence; first try turning off | |
775 | * IU, then QAS (if we can control them), then finally | |
776 | * fall down the periods */ | |
777 | if (i->f->set_iu && spi_iu(starget)) { | |
804ff603 | 778 | starget_printk(KERN_ERR, starget, "Domain Validation Disabling Information Units\n"); |
9a8bc9b8 JB |
779 | DV_SET(iu, 0); |
780 | } else if (i->f->set_qas && spi_qas(starget)) { | |
804ff603 | 781 | starget_printk(KERN_ERR, starget, "Domain Validation Disabling Quick Arbitration and Selection\n"); |
9a8bc9b8 JB |
782 | DV_SET(qas, 0); |
783 | } else { | |
784 | newperiod = spi_period(starget); | |
785 | period = newperiod > period ? newperiod : period; | |
786 | if (period < 0x0d) | |
787 | period++; | |
788 | else | |
789 | period += period >> 1; | |
790 | ||
791 | if (unlikely(period > 0xff || period == prevperiod)) { | |
792 | /* Total failure; set to async and return */ | |
9ccfc756 | 793 | starget_printk(KERN_ERR, starget, "Domain Validation Failure, dropping back to Asynchronous\n"); |
9a8bc9b8 JB |
794 | DV_SET(offset, 0); |
795 | return SPI_COMPARE_FAILURE; | |
796 | } | |
9ccfc756 | 797 | starget_printk(KERN_ERR, starget, "Domain Validation detected failure, dropping back\n"); |
9a8bc9b8 JB |
798 | DV_SET(period, period); |
799 | prevperiod = period; | |
1da177e4 | 800 | } |
1da177e4 LT |
801 | } |
802 | return retval; | |
803 | } | |
804 | ||
805 | static int | |
33aa687d | 806 | spi_dv_device_get_echo_buffer(struct scsi_device *sdev, u8 *buffer) |
1da177e4 | 807 | { |
33aa687d | 808 | int l, result; |
1da177e4 LT |
809 | |
810 | /* first off do a test unit ready. This can error out | |
811 | * because of reservations or some other reason. If it | |
812 | * fails, the device won't let us write to the echo buffer | |
813 | * so just return failure */ | |
814 | ||
c62f40bf | 815 | static const char spi_test_unit_ready[] = { |
1da177e4 LT |
816 | TEST_UNIT_READY, 0, 0, 0, 0, 0 |
817 | }; | |
818 | ||
c62f40bf | 819 | static const char spi_read_buffer_descriptor[] = { |
1da177e4 LT |
820 | READ_BUFFER, 0x0b, 0, 0, 0, 0, 0, 0, 4, 0 |
821 | }; | |
822 | ||
823 | ||
1da177e4 LT |
824 | /* We send a set of three TURs to clear any outstanding |
825 | * unit attention conditions if they exist (Otherwise the | |
826 | * buffer tests won't be happy). If the TUR still fails | |
827 | * (reservation conflict, device not ready, etc) just | |
828 | * skip the write tests */ | |
829 | for (l = 0; ; l++) { | |
c9ee828a | 830 | result = spi_execute(sdev, spi_test_unit_ready, REQ_OP_DRV_IN, |
33aa687d | 831 | NULL, 0, NULL); |
1da177e4 | 832 | |
33aa687d | 833 | if(result) { |
1da177e4 LT |
834 | if(l >= 3) |
835 | return 0; | |
836 | } else { | |
837 | /* TUR succeeded */ | |
838 | break; | |
839 | } | |
840 | } | |
841 | ||
33aa687d | 842 | result = spi_execute(sdev, spi_read_buffer_descriptor, |
c9ee828a | 843 | REQ_OP_DRV_IN, buffer, 4, NULL); |
1da177e4 | 844 | |
33aa687d | 845 | if (result) |
1da177e4 LT |
846 | /* Device has no echo buffer */ |
847 | return 0; | |
848 | ||
849 | return buffer[3] + ((buffer[2] & 0x1f) << 8); | |
850 | } | |
851 | ||
852 | static void | |
33aa687d | 853 | spi_dv_device_internal(struct scsi_device *sdev, u8 *buffer) |
1da177e4 | 854 | { |
33aa687d | 855 | struct spi_internal *i = to_spi_internal(sdev->host->transportt); |
62a86129 | 856 | struct scsi_target *starget = sdev->sdev_target; |
60eef257 | 857 | struct Scsi_Host *shost = sdev->host; |
1da177e4 | 858 | int len = sdev->inquiry_len; |
2302827c JB |
859 | int min_period = spi_min_period(starget); |
860 | int max_width = spi_max_width(starget); | |
1da177e4 LT |
861 | /* first set us up for narrow async */ |
862 | DV_SET(offset, 0); | |
863 | DV_SET(width, 0); | |
2302827c | 864 | |
33aa687d | 865 | if (spi_dv_device_compare_inquiry(sdev, buffer, buffer, DV_LOOPS) |
1da177e4 | 866 | != SPI_COMPARE_SUCCESS) { |
9ccfc756 | 867 | starget_printk(KERN_ERR, starget, "Domain Validation Initial Inquiry Failed\n"); |
1da177e4 LT |
868 | /* FIXME: should probably offline the device here? */ |
869 | return; | |
870 | } | |
871 | ||
9872b81c | 872 | if (!spi_support_wide(starget)) { |
2302827c JB |
873 | spi_max_width(starget) = 0; |
874 | max_width = 0; | |
875 | } | |
876 | ||
1da177e4 | 877 | /* test width */ |
2302827c | 878 | if (i->f->set_width && max_width) { |
9a8bc9b8 | 879 | i->f->set_width(starget, 1); |
62a86129 | 880 | |
33aa687d | 881 | if (spi_dv_device_compare_inquiry(sdev, buffer, |
1da177e4 LT |
882 | buffer + len, |
883 | DV_LOOPS) | |
884 | != SPI_COMPARE_SUCCESS) { | |
9ccfc756 | 885 | starget_printk(KERN_ERR, starget, "Wide Transfers Fail\n"); |
9a8bc9b8 | 886 | i->f->set_width(starget, 0); |
2302827c JB |
887 | /* Make sure we don't force wide back on by asking |
888 | * for a transfer period that requires it */ | |
889 | max_width = 0; | |
890 | if (min_period < 10) | |
891 | min_period = 10; | |
1da177e4 LT |
892 | } |
893 | } | |
894 | ||
895 | if (!i->f->set_period) | |
896 | return; | |
897 | ||
898 | /* device can't handle synchronous */ | |
9872b81c | 899 | if (!spi_support_sync(starget) && !spi_support_dt(starget)) |
1da177e4 LT |
900 | return; |
901 | ||
349cd7cf JB |
902 | /* len == -1 is the signal that we need to ascertain the |
903 | * presence of an echo buffer before trying to use it. len == | |
904 | * 0 means we don't have an echo buffer */ | |
905 | len = -1; | |
1da177e4 LT |
906 | |
907 | retry: | |
908 | ||
909 | /* now set up to the maximum */ | |
62a86129 | 910 | DV_SET(offset, spi_max_offset(starget)); |
2302827c JB |
911 | DV_SET(period, min_period); |
912 | ||
9a8bc9b8 JB |
913 | /* try QAS requests; this should be harmless to set if the |
914 | * target supports it */ | |
9872b81c | 915 | if (spi_support_qas(starget) && spi_max_qas(starget)) { |
eb1dd68b | 916 | DV_SET(qas, 1); |
dfdc58ba JB |
917 | } else { |
918 | DV_SET(qas, 0); | |
919 | } | |
920 | ||
9872b81c JB |
921 | if (spi_support_ius(starget) && spi_max_iu(starget) && |
922 | min_period < 9) { | |
dfdc58ba | 923 | /* This u320 (or u640). Set IU transfers */ |
eb1dd68b | 924 | DV_SET(iu, 1); |
dfdc58ba | 925 | /* Then set the optional parameters */ |
9a8bc9b8 JB |
926 | DV_SET(rd_strm, 1); |
927 | DV_SET(wr_flow, 1); | |
928 | DV_SET(rti, 1); | |
2302827c | 929 | if (min_period == 8) |
9a8bc9b8 | 930 | DV_SET(pcomp_en, 1); |
dfdc58ba JB |
931 | } else { |
932 | DV_SET(iu, 0); | |
9a8bc9b8 | 933 | } |
dfdc58ba | 934 | |
60eef257 JB |
935 | /* now that we've done all this, actually check the bus |
936 | * signal type (if known). Some devices are stupid on | |
937 | * a SE bus and still claim they can try LVD only settings */ | |
938 | if (i->f->get_signalling) | |
939 | i->f->get_signalling(shost); | |
940 | if (spi_signalling(shost) == SPI_SIGNAL_SE || | |
dfdc58ba | 941 | spi_signalling(shost) == SPI_SIGNAL_HVD || |
9872b81c | 942 | !spi_support_dt(starget)) { |
60eef257 | 943 | DV_SET(dt, 0); |
dfdc58ba JB |
944 | } else { |
945 | DV_SET(dt, 1); | |
946 | } | |
2302827c JB |
947 | /* set width last because it will pull all the other |
948 | * parameters down to required values */ | |
949 | DV_SET(width, max_width); | |
950 | ||
349cd7cf JB |
951 | /* Do the read only INQUIRY tests */ |
952 | spi_dv_retrain(sdev, buffer, buffer + sdev->inquiry_len, | |
953 | spi_dv_device_compare_inquiry); | |
954 | /* See if we actually managed to negotiate and sustain DT */ | |
955 | if (i->f->get_dt) | |
956 | i->f->get_dt(starget); | |
957 | ||
958 | /* see if the device has an echo buffer. If it does we can do | |
959 | * the SPI pattern write tests. Because of some broken | |
960 | * devices, we *only* try this on a device that has actually | |
961 | * negotiated DT */ | |
962 | ||
963 | if (len == -1 && spi_dt(starget)) | |
964 | len = spi_dv_device_get_echo_buffer(sdev, buffer); | |
1da177e4 | 965 | |
349cd7cf | 966 | if (len <= 0) { |
9ccfc756 | 967 | starget_printk(KERN_INFO, starget, "Domain Validation skipping write tests\n"); |
1da177e4 LT |
968 | return; |
969 | } | |
970 | ||
971 | if (len > SPI_MAX_ECHO_BUFFER_SIZE) { | |
9ccfc756 | 972 | starget_printk(KERN_WARNING, starget, "Echo buffer size %d is too big, trimming to %d\n", len, SPI_MAX_ECHO_BUFFER_SIZE); |
1da177e4 LT |
973 | len = SPI_MAX_ECHO_BUFFER_SIZE; |
974 | } | |
975 | ||
33aa687d | 976 | if (spi_dv_retrain(sdev, buffer, buffer + len, |
1da177e4 LT |
977 | spi_dv_device_echo_buffer) |
978 | == SPI_COMPARE_SKIP_TEST) { | |
979 | /* OK, the stupid drive can't do a write echo buffer | |
980 | * test after all, fall back to the read tests */ | |
981 | len = 0; | |
982 | goto retry; | |
983 | } | |
984 | } | |
985 | ||
986 | ||
987 | /** spi_dv_device - Do Domain Validation on the device | |
988 | * @sdev: scsi device to validate | |
989 | * | |
990 | * Performs the domain validation on the given device in the | |
991 | * current execution thread. Since DV operations may sleep, | |
992 | * the current thread must have user context. Also no SCSI | |
993 | * related locks that would deadlock I/O issued by the DV may | |
994 | * be held. | |
995 | */ | |
996 | void | |
997 | spi_dv_device(struct scsi_device *sdev) | |
998 | { | |
1da177e4 | 999 | struct scsi_target *starget = sdev->sdev_target; |
1da177e4 | 1000 | const int len = SPI_MAX_ECHO_BUFFER_SIZE*2; |
5950e5d5 PZ |
1001 | unsigned int sleep_flags; |
1002 | u8 *buffer; | |
1da177e4 | 1003 | |
203f8c25 BVA |
1004 | /* |
1005 | * Because this function and the power management code both call | |
1006 | * scsi_device_quiesce(), it is not safe to perform domain validation | |
1007 | * while suspend or resume is in progress. Hence the | |
1008 | * lock/unlock_system_sleep() calls. | |
1009 | */ | |
5950e5d5 | 1010 | sleep_flags = lock_system_sleep(); |
203f8c25 | 1011 | |
cfefd9f8 BVA |
1012 | if (scsi_autopm_get_device(sdev)) |
1013 | goto unlock_system_sleep; | |
1014 | ||
89a342ca | 1015 | if (unlikely(spi_dv_in_progress(starget))) |
cfefd9f8 | 1016 | goto put_autopm; |
1da177e4 | 1017 | |
89a342ca | 1018 | if (unlikely(scsi_device_get(sdev))) |
cfefd9f8 | 1019 | goto put_autopm; |
203f8c25 | 1020 | |
dfdc58ba JB |
1021 | spi_dv_in_progress(starget) = 1; |
1022 | ||
24669f75 | 1023 | buffer = kzalloc(len, GFP_KERNEL); |
1da177e4 LT |
1024 | |
1025 | if (unlikely(!buffer)) | |
cfefd9f8 | 1026 | goto put_sdev; |
1da177e4 | 1027 | |
1da177e4 LT |
1028 | /* We need to verify that the actual device will quiesce; the |
1029 | * later target quiesce is just a nice to have */ | |
1030 | if (unlikely(scsi_device_quiesce(sdev))) | |
cfefd9f8 | 1031 | goto free_buffer; |
1da177e4 LT |
1032 | |
1033 | scsi_target_quiesce(starget); | |
1034 | ||
1035 | spi_dv_pending(starget) = 1; | |
d158d261 | 1036 | mutex_lock(&spi_dv_mutex(starget)); |
1da177e4 | 1037 | |
9ccfc756 | 1038 | starget_printk(KERN_INFO, starget, "Beginning Domain Validation\n"); |
1da177e4 | 1039 | |
33aa687d | 1040 | spi_dv_device_internal(sdev, buffer); |
1da177e4 | 1041 | |
9ccfc756 | 1042 | starget_printk(KERN_INFO, starget, "Ending Domain Validation\n"); |
1da177e4 | 1043 | |
d158d261 | 1044 | mutex_unlock(&spi_dv_mutex(starget)); |
1da177e4 LT |
1045 | spi_dv_pending(starget) = 0; |
1046 | ||
1047 | scsi_target_resume(starget); | |
1048 | ||
1049 | spi_initial_dv(starget) = 1; | |
1050 | ||
cfefd9f8 | 1051 | free_buffer: |
1da177e4 | 1052 | kfree(buffer); |
cfefd9f8 BVA |
1053 | |
1054 | put_sdev: | |
dfdc58ba | 1055 | spi_dv_in_progress(starget) = 0; |
1da177e4 | 1056 | scsi_device_put(sdev); |
cfefd9f8 BVA |
1057 | put_autopm: |
1058 | scsi_autopm_put_device(sdev); | |
1059 | ||
1060 | unlock_system_sleep: | |
5950e5d5 | 1061 | unlock_system_sleep(sleep_flags); |
1da177e4 LT |
1062 | } |
1063 | EXPORT_SYMBOL(spi_dv_device); | |
1064 | ||
1065 | struct work_queue_wrapper { | |
1066 | struct work_struct work; | |
1067 | struct scsi_device *sdev; | |
1068 | }; | |
1069 | ||
1070 | static void | |
c4028958 | 1071 | spi_dv_device_work_wrapper(struct work_struct *work) |
1da177e4 | 1072 | { |
c4028958 DH |
1073 | struct work_queue_wrapper *wqw = |
1074 | container_of(work, struct work_queue_wrapper, work); | |
1da177e4 LT |
1075 | struct scsi_device *sdev = wqw->sdev; |
1076 | ||
1077 | kfree(wqw); | |
1078 | spi_dv_device(sdev); | |
1079 | spi_dv_pending(sdev->sdev_target) = 0; | |
1080 | scsi_device_put(sdev); | |
1081 | } | |
1082 | ||
1083 | ||
1084 | /** | |
1085 | * spi_schedule_dv_device - schedule domain validation to occur on the device | |
1086 | * @sdev: The device to validate | |
1087 | * | |
1088 | * Identical to spi_dv_device() above, except that the DV will be | |
1089 | * scheduled to occur in a workqueue later. All memory allocations | |
1090 | * are atomic, so may be called from any context including those holding | |
1091 | * SCSI locks. | |
1092 | */ | |
1093 | void | |
1094 | spi_schedule_dv_device(struct scsi_device *sdev) | |
1095 | { | |
1096 | struct work_queue_wrapper *wqw = | |
1097 | kmalloc(sizeof(struct work_queue_wrapper), GFP_ATOMIC); | |
1098 | ||
1099 | if (unlikely(!wqw)) | |
1100 | return; | |
1101 | ||
1102 | if (unlikely(spi_dv_pending(sdev->sdev_target))) { | |
1103 | kfree(wqw); | |
1104 | return; | |
1105 | } | |
1106 | /* Set pending early (dv_device doesn't check it, only sets it) */ | |
1107 | spi_dv_pending(sdev->sdev_target) = 1; | |
1108 | if (unlikely(scsi_device_get(sdev))) { | |
1109 | kfree(wqw); | |
1110 | spi_dv_pending(sdev->sdev_target) = 0; | |
1111 | return; | |
1112 | } | |
1113 | ||
c4028958 | 1114 | INIT_WORK(&wqw->work, spi_dv_device_work_wrapper); |
1da177e4 LT |
1115 | wqw->sdev = sdev; |
1116 | ||
1117 | schedule_work(&wqw->work); | |
1118 | } | |
1119 | EXPORT_SYMBOL(spi_schedule_dv_device); | |
1120 | ||
1121 | /** | |
1122 | * spi_display_xfer_agreement - Print the current target transfer agreement | |
1123 | * @starget: The target for which to display the agreement | |
1124 | * | |
1125 | * Each SPI port is required to maintain a transfer agreement for each | |
1126 | * other port on the bus. This function prints a one-line summary of | |
1127 | * the current agreement; more detailed information is available in sysfs. | |
1128 | */ | |
1129 | void spi_display_xfer_agreement(struct scsi_target *starget) | |
1130 | { | |
1131 | struct spi_transport_attrs *tp; | |
1132 | tp = (struct spi_transport_attrs *)&starget->starget_data; | |
1133 | ||
1134 | if (tp->offset > 0 && tp->period > 0) { | |
1135 | unsigned int picosec, kb100; | |
1136 | char *scsi = "FAST-?"; | |
1137 | char tmp[8]; | |
1138 | ||
1139 | if (tp->period <= SPI_STATIC_PPR) { | |
1140 | picosec = ppr_to_ps[tp->period]; | |
1141 | switch (tp->period) { | |
1142 | case 7: scsi = "FAST-320"; break; | |
1143 | case 8: scsi = "FAST-160"; break; | |
1144 | case 9: scsi = "FAST-80"; break; | |
1145 | case 10: | |
1146 | case 11: scsi = "FAST-40"; break; | |
1147 | case 12: scsi = "FAST-20"; break; | |
1148 | } | |
1149 | } else { | |
1150 | picosec = tp->period * 4000; | |
1151 | if (tp->period < 25) | |
1152 | scsi = "FAST-20"; | |
1153 | else if (tp->period < 50) | |
1154 | scsi = "FAST-10"; | |
1155 | else | |
1156 | scsi = "FAST-5"; | |
1157 | } | |
1158 | ||
1159 | kb100 = (10000000 + picosec / 2) / picosec; | |
1160 | if (tp->width) | |
1161 | kb100 *= 2; | |
1162 | sprint_frac(tmp, picosec, 1000); | |
1163 | ||
1164 | dev_info(&starget->dev, | |
d872ebe4 JB |
1165 | "%s %sSCSI %d.%d MB/s %s%s%s%s%s%s%s%s (%s ns, offset %d)\n", |
1166 | scsi, tp->width ? "WIDE " : "", kb100/10, kb100 % 10, | |
1167 | tp->dt ? "DT" : "ST", | |
1168 | tp->iu ? " IU" : "", | |
1169 | tp->qas ? " QAS" : "", | |
1170 | tp->rd_strm ? " RDSTRM" : "", | |
1171 | tp->rti ? " RTI" : "", | |
1172 | tp->wr_flow ? " WRFLOW" : "", | |
1173 | tp->pcomp_en ? " PCOMP" : "", | |
1174 | tp->hold_mcs ? " HMCS" : "", | |
1175 | tmp, tp->offset); | |
1da177e4 | 1176 | } else { |
493ff4ee | 1177 | dev_info(&starget->dev, "%sasynchronous\n", |
1da177e4 LT |
1178 | tp->width ? "wide " : ""); |
1179 | } | |
1180 | } | |
1181 | EXPORT_SYMBOL(spi_display_xfer_agreement); | |
1182 | ||
6ea3c0b2 MW |
1183 | int spi_populate_width_msg(unsigned char *msg, int width) |
1184 | { | |
1185 | msg[0] = EXTENDED_MESSAGE; | |
1186 | msg[1] = 2; | |
1187 | msg[2] = EXTENDED_WDTR; | |
1188 | msg[3] = width; | |
1189 | return 4; | |
1190 | } | |
38e14f89 | 1191 | EXPORT_SYMBOL_GPL(spi_populate_width_msg); |
6ea3c0b2 MW |
1192 | |
1193 | int spi_populate_sync_msg(unsigned char *msg, int period, int offset) | |
1194 | { | |
1195 | msg[0] = EXTENDED_MESSAGE; | |
1196 | msg[1] = 3; | |
1197 | msg[2] = EXTENDED_SDTR; | |
1198 | msg[3] = period; | |
1199 | msg[4] = offset; | |
1200 | return 5; | |
1201 | } | |
38e14f89 | 1202 | EXPORT_SYMBOL_GPL(spi_populate_sync_msg); |
6ea3c0b2 MW |
1203 | |
1204 | int spi_populate_ppr_msg(unsigned char *msg, int period, int offset, | |
1205 | int width, int options) | |
1206 | { | |
1207 | msg[0] = EXTENDED_MESSAGE; | |
1208 | msg[1] = 6; | |
1209 | msg[2] = EXTENDED_PPR; | |
1210 | msg[3] = period; | |
1211 | msg[4] = 0; | |
1212 | msg[5] = offset; | |
1213 | msg[6] = width; | |
1214 | msg[7] = options; | |
1215 | return 8; | |
1216 | } | |
38e14f89 | 1217 | EXPORT_SYMBOL_GPL(spi_populate_ppr_msg); |
6ea3c0b2 | 1218 | |
50668633 CH |
1219 | /** |
1220 | * spi_populate_tag_msg - place a tag message in a buffer | |
1221 | * @msg: pointer to the area to place the tag | |
1222 | * @cmd: pointer to the scsi command for the tag | |
1223 | * | |
1224 | * Notes: | |
1225 | * designed to create the correct type of tag message for the | |
1226 | * particular request. Returns the size of the tag message. | |
1227 | * May return 0 if TCQ is disabled for this device. | |
1228 | **/ | |
1229 | int spi_populate_tag_msg(unsigned char *msg, struct scsi_cmnd *cmd) | |
1230 | { | |
1231 | if (cmd->flags & SCMD_TAGGED) { | |
68d81f40 | 1232 | *msg++ = SIMPLE_QUEUE_TAG; |
eb43d41d | 1233 | *msg++ = scsi_cmd_to_rq(cmd)->tag; |
50668633 CH |
1234 | return 2; |
1235 | } | |
1236 | ||
1237 | return 0; | |
1238 | } | |
1239 | EXPORT_SYMBOL_GPL(spi_populate_tag_msg); | |
1240 | ||
410ca5c7 MW |
1241 | #ifdef CONFIG_SCSI_CONSTANTS |
1242 | static const char * const one_byte_msgs[] = { | |
72df0ebf | 1243 | /* 0x00 */ "Task Complete", NULL /* Extended Message */, "Save Pointers", |
410ca5c7 | 1244 | /* 0x03 */ "Restore Pointers", "Disconnect", "Initiator Error", |
72df0ebf | 1245 | /* 0x06 */ "Abort Task Set", "Message Reject", "Nop", "Message Parity Error", |
410ca5c7 | 1246 | /* 0x0a */ "Linked Command Complete", "Linked Command Complete w/flag", |
72df0ebf MW |
1247 | /* 0x0c */ "Target Reset", "Abort Task", "Clear Task Set", |
1248 | /* 0x0f */ "Initiate Recovery", "Release Recovery", | |
1249 | /* 0x11 */ "Terminate Process", "Continue Task", "Target Transfer Disable", | |
1250 | /* 0x14 */ NULL, NULL, "Clear ACA", "LUN Reset" | |
410ca5c7 | 1251 | }; |
410ca5c7 MW |
1252 | |
1253 | static const char * const two_byte_msgs[] = { | |
47972153 | 1254 | /* 0x20 */ "Simple Queue Tag", "Head of Queue Tag", "Ordered Queue Tag", |
72df0ebf | 1255 | /* 0x23 */ "Ignore Wide Residue", "ACA" |
410ca5c7 | 1256 | }; |
410ca5c7 MW |
1257 | |
1258 | static const char * const extended_msgs[] = { | |
1259 | /* 0x00 */ "Modify Data Pointer", "Synchronous Data Transfer Request", | |
ef72582e | 1260 | /* 0x02 */ "SCSI-I Extended Identify", "Wide Data Transfer Request", |
fc25307d | 1261 | /* 0x04 */ "Parallel Protocol Request", "Modify Bidirectional Data Pointer" |
410ca5c7 | 1262 | }; |
410ca5c7 | 1263 | |
bdd70f2c | 1264 | static void print_nego(const unsigned char *msg, int per, int off, int width) |
ef72582e MW |
1265 | { |
1266 | if (per) { | |
1267 | char buf[20]; | |
1268 | period_to_str(buf, msg[per]); | |
1269 | printk("period = %s ns ", buf); | |
1270 | } | |
1271 | ||
1272 | if (off) | |
1273 | printk("offset = %d ", msg[off]); | |
1274 | if (width) | |
1275 | printk("width = %d ", 8 << msg[width]); | |
1276 | } | |
410ca5c7 | 1277 | |
fc25307d MW |
1278 | static void print_ptr(const unsigned char *msg, int msb, const char *desc) |
1279 | { | |
1280 | int ptr = (msg[msb] << 24) | (msg[msb+1] << 16) | (msg[msb+2] << 8) | | |
1281 | msg[msb+3]; | |
1282 | printk("%s = %d ", desc, ptr); | |
1283 | } | |
1284 | ||
1abfd370 | 1285 | int spi_print_msg(const unsigned char *msg) |
410ca5c7 | 1286 | { |
72df0ebf | 1287 | int len = 1, i; |
410ca5c7 | 1288 | if (msg[0] == EXTENDED_MESSAGE) { |
fc25307d MW |
1289 | len = 2 + msg[1]; |
1290 | if (len == 2) | |
1291 | len += 256; | |
b32aaffc | 1292 | if (msg[2] < ARRAY_SIZE(extended_msgs)) |
410ca5c7 MW |
1293 | printk ("%s ", extended_msgs[msg[2]]); |
1294 | else | |
1295 | printk ("Extended Message, reserved code (0x%02x) ", | |
1296 | (int) msg[2]); | |
1297 | switch (msg[2]) { | |
1298 | case EXTENDED_MODIFY_DATA_POINTER: | |
fc25307d | 1299 | print_ptr(msg, 3, "pointer"); |
410ca5c7 MW |
1300 | break; |
1301 | case EXTENDED_SDTR: | |
ef72582e | 1302 | print_nego(msg, 3, 4, 0); |
410ca5c7 MW |
1303 | break; |
1304 | case EXTENDED_WDTR: | |
ef72582e MW |
1305 | print_nego(msg, 0, 0, 3); |
1306 | break; | |
1307 | case EXTENDED_PPR: | |
1308 | print_nego(msg, 3, 5, 6); | |
410ca5c7 | 1309 | break; |
fc25307d MW |
1310 | case EXTENDED_MODIFY_BIDI_DATA_PTR: |
1311 | print_ptr(msg, 3, "out"); | |
1312 | print_ptr(msg, 7, "in"); | |
1313 | break; | |
410ca5c7 MW |
1314 | default: |
1315 | for (i = 2; i < len; ++i) | |
1316 | printk("%02x ", msg[i]); | |
1317 | } | |
1318 | /* Identify */ | |
1319 | } else if (msg[0] & 0x80) { | |
1320 | printk("Identify disconnect %sallowed %s %d ", | |
1321 | (msg[0] & 0x40) ? "" : "not ", | |
1322 | (msg[0] & 0x20) ? "target routine" : "lun", | |
1323 | msg[0] & 0x7); | |
410ca5c7 MW |
1324 | /* Normal One byte */ |
1325 | } else if (msg[0] < 0x1f) { | |
72df0ebf | 1326 | if (msg[0] < ARRAY_SIZE(one_byte_msgs) && one_byte_msgs[msg[0]]) |
e24d873d | 1327 | printk("%s ", one_byte_msgs[msg[0]]); |
410ca5c7 MW |
1328 | else |
1329 | printk("reserved (%02x) ", msg[0]); | |
72df0ebf MW |
1330 | } else if (msg[0] == 0x55) { |
1331 | printk("QAS Request "); | |
410ca5c7 MW |
1332 | /* Two byte */ |
1333 | } else if (msg[0] <= 0x2f) { | |
b32aaffc | 1334 | if ((msg[0] - 0x20) < ARRAY_SIZE(two_byte_msgs)) |
410ca5c7 MW |
1335 | printk("%s %02x ", two_byte_msgs[msg[0] - 0x20], |
1336 | msg[1]); | |
1337 | else | |
1338 | printk("reserved two byte (%02x %02x) ", | |
1339 | msg[0], msg[1]); | |
1340 | len = 2; | |
1341 | } else | |
e24d873d | 1342 | printk("reserved "); |
410ca5c7 MW |
1343 | return len; |
1344 | } | |
1abfd370 | 1345 | EXPORT_SYMBOL(spi_print_msg); |
410ca5c7 MW |
1346 | |
1347 | #else /* ifndef CONFIG_SCSI_CONSTANTS */ | |
1348 | ||
1abfd370 | 1349 | int spi_print_msg(const unsigned char *msg) |
410ca5c7 | 1350 | { |
72df0ebf | 1351 | int len = 1, i; |
410ca5c7 MW |
1352 | |
1353 | if (msg[0] == EXTENDED_MESSAGE) { | |
fc25307d MW |
1354 | len = 2 + msg[1]; |
1355 | if (len == 2) | |
1356 | len += 256; | |
410ca5c7 MW |
1357 | for (i = 0; i < len; ++i) |
1358 | printk("%02x ", msg[i]); | |
1359 | /* Identify */ | |
1360 | } else if (msg[0] & 0x80) { | |
1361 | printk("%02x ", msg[0]); | |
410ca5c7 | 1362 | /* Normal One byte */ |
597705aa | 1363 | } else if ((msg[0] < 0x1f) || (msg[0] == 0x55)) { |
410ca5c7 | 1364 | printk("%02x ", msg[0]); |
410ca5c7 MW |
1365 | /* Two byte */ |
1366 | } else if (msg[0] <= 0x2f) { | |
1367 | printk("%02x %02x", msg[0], msg[1]); | |
1368 | len = 2; | |
1369 | } else | |
1370 | printk("%02x ", msg[0]); | |
1371 | return len; | |
1372 | } | |
1abfd370 | 1373 | EXPORT_SYMBOL(spi_print_msg); |
410ca5c7 MW |
1374 | #endif /* ! CONFIG_SCSI_CONSTANTS */ |
1375 | ||
1da177e4 LT |
1376 | static int spi_device_match(struct attribute_container *cont, |
1377 | struct device *dev) | |
1378 | { | |
1379 | struct scsi_device *sdev; | |
1380 | struct Scsi_Host *shost; | |
10c1b889 | 1381 | struct spi_internal *i; |
1da177e4 LT |
1382 | |
1383 | if (!scsi_is_sdev_device(dev)) | |
1384 | return 0; | |
1385 | ||
1386 | sdev = to_scsi_device(dev); | |
1387 | shost = sdev->host; | |
1388 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1389 | != &spi_host_class.class) | |
1390 | return 0; | |
1391 | /* Note: this class has no device attributes, so it has | |
1392 | * no per-HBA allocation and thus we don't need to distinguish | |
1393 | * the attribute containers for the device */ | |
10c1b889 JB |
1394 | i = to_spi_internal(shost->transportt); |
1395 | if (i->f->deny_binding && i->f->deny_binding(sdev->sdev_target)) | |
1396 | return 0; | |
1da177e4 LT |
1397 | return 1; |
1398 | } | |
1399 | ||
1400 | static int spi_target_match(struct attribute_container *cont, | |
1401 | struct device *dev) | |
1402 | { | |
1403 | struct Scsi_Host *shost; | |
10c1b889 | 1404 | struct scsi_target *starget; |
1da177e4 LT |
1405 | struct spi_internal *i; |
1406 | ||
1407 | if (!scsi_is_target_device(dev)) | |
1408 | return 0; | |
1409 | ||
1410 | shost = dev_to_shost(dev->parent); | |
1411 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1412 | != &spi_host_class.class) | |
1413 | return 0; | |
1414 | ||
1415 | i = to_spi_internal(shost->transportt); | |
10c1b889 JB |
1416 | starget = to_scsi_target(dev); |
1417 | ||
1418 | if (i->f->deny_binding && i->f->deny_binding(starget)) | |
1419 | return 0; | |
1420 | ||
1da177e4 LT |
1421 | return &i->t.target_attrs.ac == cont; |
1422 | } | |
1423 | ||
1424 | static DECLARE_TRANSPORT_CLASS(spi_transport_class, | |
1425 | "spi_transport", | |
1426 | spi_setup_transport_attrs, | |
1427 | NULL, | |
9b161a4d | 1428 | spi_target_configure); |
1da177e4 LT |
1429 | |
1430 | static DECLARE_ANON_TRANSPORT_CLASS(spi_device_class, | |
1431 | spi_device_match, | |
1432 | spi_device_configure); | |
1433 | ||
9b161a4d | 1434 | static struct attribute *host_attributes[] = { |
ee959b00 | 1435 | &dev_attr_signalling.attr, |
0ac2377b HR |
1436 | &dev_attr_host_width.attr, |
1437 | &dev_attr_hba_id.attr, | |
9b161a4d JB |
1438 | NULL |
1439 | }; | |
1440 | ||
1441 | static struct attribute_group host_attribute_group = { | |
1442 | .attrs = host_attributes, | |
1443 | }; | |
1444 | ||
1445 | static int spi_host_configure(struct transport_container *tc, | |
1446 | struct device *dev, | |
ee959b00 | 1447 | struct device *cdev) |
9b161a4d JB |
1448 | { |
1449 | struct kobject *kobj = &cdev->kobj; | |
1450 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1451 | struct spi_internal *si = to_spi_internal(shost->transportt); | |
ee959b00 | 1452 | struct attribute *attr = &dev_attr_signalling.attr; |
9b161a4d JB |
1453 | int rc = 0; |
1454 | ||
1455 | if (si->f->set_signalling) | |
1456 | rc = sysfs_chmod_file(kobj, attr, attr->mode | S_IWUSR); | |
1457 | ||
1458 | return rc; | |
1459 | } | |
1460 | ||
1461 | /* returns true if we should be showing the variable. Also | |
1462 | * overloads the return by setting 1<<1 if the attribute should | |
1463 | * be writeable */ | |
1464 | #define TARGET_ATTRIBUTE_HELPER(name) \ | |
352f6bb4 JB |
1465 | (si->f->show_##name ? S_IRUGO : 0) | \ |
1466 | (si->f->set_##name ? S_IWUSR : 0) | |
9b161a4d | 1467 | |
587a1f16 | 1468 | static umode_t target_attribute_is_visible(struct kobject *kobj, |
352f6bb4 | 1469 | struct attribute *attr, int i) |
9b161a4d | 1470 | { |
ee959b00 | 1471 | struct device *cdev = container_of(kobj, struct device, kobj); |
9b161a4d JB |
1472 | struct scsi_target *starget = transport_class_to_starget(cdev); |
1473 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1474 | struct spi_internal *si = to_spi_internal(shost->transportt); | |
1475 | ||
ee959b00 | 1476 | if (attr == &dev_attr_period.attr && |
9b161a4d JB |
1477 | spi_support_sync(starget)) |
1478 | return TARGET_ATTRIBUTE_HELPER(period); | |
ee959b00 | 1479 | else if (attr == &dev_attr_min_period.attr && |
9b161a4d JB |
1480 | spi_support_sync(starget)) |
1481 | return TARGET_ATTRIBUTE_HELPER(period); | |
ee959b00 | 1482 | else if (attr == &dev_attr_offset.attr && |
9b161a4d JB |
1483 | spi_support_sync(starget)) |
1484 | return TARGET_ATTRIBUTE_HELPER(offset); | |
ee959b00 | 1485 | else if (attr == &dev_attr_max_offset.attr && |
9b161a4d JB |
1486 | spi_support_sync(starget)) |
1487 | return TARGET_ATTRIBUTE_HELPER(offset); | |
ee959b00 | 1488 | else if (attr == &dev_attr_width.attr && |
9b161a4d JB |
1489 | spi_support_wide(starget)) |
1490 | return TARGET_ATTRIBUTE_HELPER(width); | |
ee959b00 | 1491 | else if (attr == &dev_attr_max_width.attr && |
9b161a4d JB |
1492 | spi_support_wide(starget)) |
1493 | return TARGET_ATTRIBUTE_HELPER(width); | |
ee959b00 | 1494 | else if (attr == &dev_attr_iu.attr && |
9b161a4d JB |
1495 | spi_support_ius(starget)) |
1496 | return TARGET_ATTRIBUTE_HELPER(iu); | |
ea443190 JB |
1497 | else if (attr == &dev_attr_max_iu.attr && |
1498 | spi_support_ius(starget)) | |
1499 | return TARGET_ATTRIBUTE_HELPER(iu); | |
ee959b00 | 1500 | else if (attr == &dev_attr_dt.attr && |
9b161a4d JB |
1501 | spi_support_dt(starget)) |
1502 | return TARGET_ATTRIBUTE_HELPER(dt); | |
ee959b00 | 1503 | else if (attr == &dev_attr_qas.attr && |
9b161a4d JB |
1504 | spi_support_qas(starget)) |
1505 | return TARGET_ATTRIBUTE_HELPER(qas); | |
ea443190 JB |
1506 | else if (attr == &dev_attr_max_qas.attr && |
1507 | spi_support_qas(starget)) | |
1508 | return TARGET_ATTRIBUTE_HELPER(qas); | |
ee959b00 | 1509 | else if (attr == &dev_attr_wr_flow.attr && |
9b161a4d JB |
1510 | spi_support_ius(starget)) |
1511 | return TARGET_ATTRIBUTE_HELPER(wr_flow); | |
ee959b00 | 1512 | else if (attr == &dev_attr_rd_strm.attr && |
9b161a4d JB |
1513 | spi_support_ius(starget)) |
1514 | return TARGET_ATTRIBUTE_HELPER(rd_strm); | |
ee959b00 | 1515 | else if (attr == &dev_attr_rti.attr && |
9b161a4d JB |
1516 | spi_support_ius(starget)) |
1517 | return TARGET_ATTRIBUTE_HELPER(rti); | |
ee959b00 | 1518 | else if (attr == &dev_attr_pcomp_en.attr && |
9b161a4d JB |
1519 | spi_support_ius(starget)) |
1520 | return TARGET_ATTRIBUTE_HELPER(pcomp_en); | |
ee959b00 | 1521 | else if (attr == &dev_attr_hold_mcs.attr && |
9b161a4d JB |
1522 | spi_support_ius(starget)) |
1523 | return TARGET_ATTRIBUTE_HELPER(hold_mcs); | |
ee959b00 | 1524 | else if (attr == &dev_attr_revalidate.attr) |
352f6bb4 | 1525 | return S_IWUSR; |
9b161a4d JB |
1526 | |
1527 | return 0; | |
1528 | } | |
1529 | ||
1530 | static struct attribute *target_attributes[] = { | |
ee959b00 TJ |
1531 | &dev_attr_period.attr, |
1532 | &dev_attr_min_period.attr, | |
1533 | &dev_attr_offset.attr, | |
1534 | &dev_attr_max_offset.attr, | |
1535 | &dev_attr_width.attr, | |
1536 | &dev_attr_max_width.attr, | |
1537 | &dev_attr_iu.attr, | |
ea443190 | 1538 | &dev_attr_max_iu.attr, |
ee959b00 TJ |
1539 | &dev_attr_dt.attr, |
1540 | &dev_attr_qas.attr, | |
ea443190 | 1541 | &dev_attr_max_qas.attr, |
ee959b00 TJ |
1542 | &dev_attr_wr_flow.attr, |
1543 | &dev_attr_rd_strm.attr, | |
1544 | &dev_attr_rti.attr, | |
1545 | &dev_attr_pcomp_en.attr, | |
1546 | &dev_attr_hold_mcs.attr, | |
1547 | &dev_attr_revalidate.attr, | |
9b161a4d JB |
1548 | NULL |
1549 | }; | |
1550 | ||
1551 | static struct attribute_group target_attribute_group = { | |
1552 | .attrs = target_attributes, | |
1553 | .is_visible = target_attribute_is_visible, | |
1554 | }; | |
1555 | ||
1556 | static int spi_target_configure(struct transport_container *tc, | |
1557 | struct device *dev, | |
ee959b00 | 1558 | struct device *cdev) |
9b161a4d JB |
1559 | { |
1560 | struct kobject *kobj = &cdev->kobj; | |
352f6bb4 JB |
1561 | |
1562 | /* force an update based on parameters read from the device */ | |
1563 | sysfs_update_group(kobj, &target_attribute_group); | |
9b161a4d JB |
1564 | |
1565 | return 0; | |
1566 | } | |
1567 | ||
1da177e4 LT |
1568 | struct scsi_transport_template * |
1569 | spi_attach_transport(struct spi_function_template *ft) | |
1570 | { | |
24669f75 JS |
1571 | struct spi_internal *i = kzalloc(sizeof(struct spi_internal), |
1572 | GFP_KERNEL); | |
1573 | ||
1da177e4 LT |
1574 | if (unlikely(!i)) |
1575 | return NULL; | |
1576 | ||
1da177e4 | 1577 | i->t.target_attrs.ac.class = &spi_transport_class.class; |
9b161a4d | 1578 | i->t.target_attrs.ac.grp = &target_attribute_group; |
1da177e4 LT |
1579 | i->t.target_attrs.ac.match = spi_target_match; |
1580 | transport_container_register(&i->t.target_attrs); | |
1581 | i->t.target_size = sizeof(struct spi_transport_attrs); | |
1582 | i->t.host_attrs.ac.class = &spi_host_class.class; | |
9b161a4d | 1583 | i->t.host_attrs.ac.grp = &host_attribute_group; |
1da177e4 LT |
1584 | i->t.host_attrs.ac.match = spi_host_match; |
1585 | transport_container_register(&i->t.host_attrs); | |
1586 | i->t.host_size = sizeof(struct spi_host_attrs); | |
1587 | i->f = ft; | |
1588 | ||
1da177e4 LT |
1589 | return &i->t; |
1590 | } | |
1591 | EXPORT_SYMBOL(spi_attach_transport); | |
1592 | ||
1593 | void spi_release_transport(struct scsi_transport_template *t) | |
1594 | { | |
1595 | struct spi_internal *i = to_spi_internal(t); | |
1596 | ||
1597 | transport_container_unregister(&i->t.target_attrs); | |
1598 | transport_container_unregister(&i->t.host_attrs); | |
1599 | ||
1600 | kfree(i); | |
1601 | } | |
1602 | EXPORT_SYMBOL(spi_release_transport); | |
1603 | ||
1604 | static __init int spi_transport_init(void) | |
1605 | { | |
a9e0edb6 JB |
1606 | int error = scsi_dev_info_add_list(SCSI_DEVINFO_SPI, |
1607 | "SCSI Parallel Transport Class"); | |
1608 | if (!error) { | |
1609 | int i; | |
1610 | ||
1611 | for (i = 0; spi_static_device_list[i].vendor; i++) | |
1612 | scsi_dev_info_list_add_keyed(1, /* compatible */ | |
1613 | spi_static_device_list[i].vendor, | |
1614 | spi_static_device_list[i].model, | |
1615 | NULL, | |
1616 | spi_static_device_list[i].flags, | |
1617 | SCSI_DEVINFO_SPI); | |
1618 | } | |
1619 | ||
1620 | error = transport_class_register(&spi_transport_class); | |
1da177e4 LT |
1621 | if (error) |
1622 | return error; | |
1623 | error = anon_transport_class_register(&spi_device_class); | |
1624 | return transport_class_register(&spi_host_class); | |
1625 | } | |
1626 | ||
1627 | static void __exit spi_transport_exit(void) | |
1628 | { | |
1629 | transport_class_unregister(&spi_transport_class); | |
1630 | anon_transport_class_unregister(&spi_device_class); | |
1631 | transport_class_unregister(&spi_host_class); | |
a9e0edb6 | 1632 | scsi_dev_info_remove_list(SCSI_DEVINFO_SPI); |
1da177e4 LT |
1633 | } |
1634 | ||
1635 | MODULE_AUTHOR("Martin Hicks"); | |
1636 | MODULE_DESCRIPTION("SPI Transport Attributes"); | |
1637 | MODULE_LICENSE("GPL"); | |
1638 | ||
1639 | module_init(spi_transport_init); | |
1640 | module_exit(spi_transport_exit); |