Merge branch 'upstream-fixes' of git://lost.foo-projects.org/~ahkok/git/netdev-2...
[linux-2.6] / drivers / scsi / aic7xxx / aic79xx_proc.c
1 /*
2  * Copyright (c) 2000-2001 Adaptec Inc.
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions, and the following disclaimer,
10  *    without modification.
11  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
12  *    substantially similar to the "NO WARRANTY" disclaimer below
13  *    ("Disclaimer") and any redistribution must be conditioned upon
14  *    including a substantially similar Disclaimer requirement for further
15  *    binary redistribution.
16  * 3. Neither the names of the above-listed copyright holders nor the names
17  *    of any contributors may be used to endorse or promote products derived
18  *    from this software without specific prior written permission.
19  *
20  * Alternatively, this software may be distributed under the terms of the
21  * GNU General Public License ("GPL") version 2 as published by the Free
22  * Software Foundation.
23  *
24  * NO WARRANTY
25  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
28  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
33  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
34  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35  * POSSIBILITY OF SUCH DAMAGES.
36  *
37  * String handling code courtesy of Gerard Roudier's <groudier@club-internet.fr>
38  * sym driver.
39  *
40  * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_proc.c#19 $
41  */
42 #include "aic79xx_osm.h"
43 #include "aic79xx_inline.h"
44
45 static void     copy_mem_info(struct info_str *info, char *data, int len);
46 static int      copy_info(struct info_str *info, char *fmt, ...);
47 static void     ahd_dump_target_state(struct ahd_softc *ahd,
48                                       struct info_str *info,
49                                       u_int our_id, char channel,
50                                       u_int target_id);
51 static void     ahd_dump_device_state(struct info_str *info,
52                                       struct scsi_device *sdev);
53 static int      ahd_proc_write_seeprom(struct ahd_softc *ahd,
54                                        char *buffer, int length);
55
56 /*
57  * Table of syncrates that don't follow the "divisible by 4"
58  * rule. This table will be expanded in future SCSI specs.
59  */
60 static struct {
61         u_int period_factor;
62         u_int period;   /* in 100ths of ns */
63 } scsi_syncrates[] = {
64         { 0x08, 625 },  /* FAST-160 */
65         { 0x09, 1250 }, /* FAST-80 */
66         { 0x0a, 2500 }, /* FAST-40 40MHz */
67         { 0x0b, 3030 }, /* FAST-40 33MHz */
68         { 0x0c, 5000 }  /* FAST-20 */
69 };
70
71 /*
72  * Return the frequency in kHz corresponding to the given
73  * sync period factor.
74  */
75 static u_int
76 ahd_calc_syncsrate(u_int period_factor)
77 {
78         int i;
79
80         /* See if the period is in the "exception" table */
81         for (i = 0; i < ARRAY_SIZE(scsi_syncrates); i++) {
82
83                 if (period_factor == scsi_syncrates[i].period_factor) {
84                         /* Period in kHz */
85                         return (100000000 / scsi_syncrates[i].period);
86                 }
87         }
88
89         /*
90          * Wasn't in the table, so use the standard
91          * 4 times conversion.
92          */
93         return (10000000 / (period_factor * 4 * 10));
94 }
95
96
97 static void
98 copy_mem_info(struct info_str *info, char *data, int len)
99 {
100         if (info->pos + len > info->offset + info->length)
101                 len = info->offset + info->length - info->pos;
102
103         if (info->pos + len < info->offset) {
104                 info->pos += len;
105                 return;
106         }
107
108         if (info->pos < info->offset) {
109                 off_t partial;
110
111                 partial = info->offset - info->pos;
112                 data += partial;
113                 info->pos += partial;
114                 len  -= partial;
115         }
116
117         if (len > 0) {
118                 memcpy(info->buffer, data, len);
119                 info->pos += len;
120                 info->buffer += len;
121         }
122 }
123
124 static int
125 copy_info(struct info_str *info, char *fmt, ...)
126 {
127         va_list args;
128         char buf[256];
129         int len;
130
131         va_start(args, fmt);
132         len = vsprintf(buf, fmt, args);
133         va_end(args);
134
135         copy_mem_info(info, buf, len);
136         return (len);
137 }
138
139 static void
140 ahd_format_transinfo(struct info_str *info, struct ahd_transinfo *tinfo)
141 {
142         u_int speed;
143         u_int freq;
144         u_int mb;
145
146         if (tinfo->period == AHD_PERIOD_UNKNOWN) {
147                 copy_info(info, "Renegotiation Pending\n");
148                 return;
149         }
150         speed = 3300;
151         freq = 0;
152         if (tinfo->offset != 0) {
153                 freq = ahd_calc_syncsrate(tinfo->period);
154                 speed = freq;
155         }
156         speed *= (0x01 << tinfo->width);
157         mb = speed / 1000;
158         if (mb > 0)
159                 copy_info(info, "%d.%03dMB/s transfers", mb, speed % 1000);
160         else
161                 copy_info(info, "%dKB/s transfers", speed);
162
163         if (freq != 0) {
164                 int     printed_options;
165
166                 printed_options = 0;
167                 copy_info(info, " (%d.%03dMHz", freq / 1000, freq % 1000);
168                 if ((tinfo->ppr_options & MSG_EXT_PPR_RD_STRM) != 0) {
169                         copy_info(info, " RDSTRM");
170                         printed_options++;
171                 }
172                 if ((tinfo->ppr_options & MSG_EXT_PPR_DT_REQ) != 0) {
173                         copy_info(info, "%s", printed_options ? "|DT" : " DT");
174                         printed_options++;
175                 }
176                 if ((tinfo->ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
177                         copy_info(info, "%s", printed_options ? "|IU" : " IU");
178                         printed_options++;
179                 }
180                 if ((tinfo->ppr_options & MSG_EXT_PPR_RTI) != 0) {
181                         copy_info(info, "%s",
182                                   printed_options ? "|RTI" : " RTI");
183                         printed_options++;
184                 }
185                 if ((tinfo->ppr_options & MSG_EXT_PPR_QAS_REQ) != 0) {
186                         copy_info(info, "%s",
187                                   printed_options ? "|QAS" : " QAS");
188                         printed_options++;
189                 }
190         }
191
192         if (tinfo->width > 0) {
193                 if (freq != 0) {
194                         copy_info(info, ", ");
195                 } else {
196                         copy_info(info, " (");
197                 }
198                 copy_info(info, "%dbit)", 8 * (0x01 << tinfo->width));
199         } else if (freq != 0) {
200                 copy_info(info, ")");
201         }
202         copy_info(info, "\n");
203 }
204
205 static void
206 ahd_dump_target_state(struct ahd_softc *ahd, struct info_str *info,
207                       u_int our_id, char channel, u_int target_id)
208 {
209         struct  scsi_target *starget;
210         struct  ahd_initiator_tinfo *tinfo;
211         struct  ahd_tmode_tstate *tstate;
212         int     lun;
213
214         tinfo = ahd_fetch_transinfo(ahd, channel, our_id,
215                                     target_id, &tstate);
216         copy_info(info, "Target %d Negotiation Settings\n", target_id);
217         copy_info(info, "\tUser: ");
218         ahd_format_transinfo(info, &tinfo->user);
219         starget = ahd->platform_data->starget[target_id];
220         if (starget == NULL)
221                 return;
222
223         copy_info(info, "\tGoal: ");
224         ahd_format_transinfo(info, &tinfo->goal);
225         copy_info(info, "\tCurr: ");
226         ahd_format_transinfo(info, &tinfo->curr);
227
228         for (lun = 0; lun < AHD_NUM_LUNS; lun++) {
229                 struct scsi_device *dev;
230
231                 dev = scsi_device_lookup_by_target(starget, lun);
232
233                 if (dev == NULL)
234                         continue;
235
236                 ahd_dump_device_state(info, dev);
237         }
238 }
239
240 static void
241 ahd_dump_device_state(struct info_str *info, struct scsi_device *sdev)
242 {
243         struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
244
245         copy_info(info, "\tChannel %c Target %d Lun %d Settings\n",
246                   sdev->sdev_target->channel + 'A',
247                   sdev->sdev_target->id, sdev->lun);
248
249         copy_info(info, "\t\tCommands Queued %ld\n", dev->commands_issued);
250         copy_info(info, "\t\tCommands Active %d\n", dev->active);
251         copy_info(info, "\t\tCommand Openings %d\n", dev->openings);
252         copy_info(info, "\t\tMax Tagged Openings %d\n", dev->maxtags);
253         copy_info(info, "\t\tDevice Queue Frozen Count %d\n", dev->qfrozen);
254 }
255
256 static int
257 ahd_proc_write_seeprom(struct ahd_softc *ahd, char *buffer, int length)
258 {
259         ahd_mode_state saved_modes;
260         int have_seeprom;
261         u_long s;
262         int paused;
263         int written;
264
265         /* Default to failure. */
266         written = -EINVAL;
267         ahd_lock(ahd, &s);
268         paused = ahd_is_paused(ahd);
269         if (!paused)
270                 ahd_pause(ahd);
271
272         saved_modes = ahd_save_modes(ahd);
273         ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
274         if (length != sizeof(struct seeprom_config)) {
275                 printf("ahd_proc_write_seeprom: incorrect buffer size\n");
276                 goto done;
277         }
278
279         have_seeprom = ahd_verify_cksum((struct seeprom_config*)buffer);
280         if (have_seeprom == 0) {
281                 printf("ahd_proc_write_seeprom: cksum verification failed\n");
282                 goto done;
283         }
284
285         have_seeprom = ahd_acquire_seeprom(ahd);
286         if (!have_seeprom) {
287                 printf("ahd_proc_write_seeprom: No Serial EEPROM\n");
288                 goto done;
289         } else {
290                 u_int start_addr;
291
292                 if (ahd->seep_config == NULL) {
293                         ahd->seep_config = malloc(sizeof(*ahd->seep_config),
294                                                   M_DEVBUF, M_NOWAIT);
295                         if (ahd->seep_config == NULL) {
296                                 printf("aic79xx: Unable to allocate serial "
297                                        "eeprom buffer.  Write failing\n");
298                                 goto done;
299                         }
300                 }
301                 printf("aic79xx: Writing Serial EEPROM\n");
302                 start_addr = 32 * (ahd->channel - 'A');
303                 ahd_write_seeprom(ahd, (u_int16_t *)buffer, start_addr,
304                                   sizeof(struct seeprom_config)/2);
305                 ahd_read_seeprom(ahd, (uint16_t *)ahd->seep_config,
306                                  start_addr, sizeof(struct seeprom_config)/2,
307                                  /*ByteStream*/FALSE);
308                 ahd_release_seeprom(ahd);
309                 written = length;
310         }
311
312 done:
313         ahd_restore_modes(ahd, saved_modes);
314         if (!paused)
315                 ahd_unpause(ahd);
316         ahd_unlock(ahd, &s);
317         return (written);
318 }
319 /*
320  * Return information to handle /proc support for the driver.
321  */
322 int
323 ahd_linux_proc_info(struct Scsi_Host *shost, char *buffer, char **start,
324                     off_t offset, int length, int inout)
325 {
326         struct  ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
327         struct  info_str info;
328         char    ahd_info[256];
329         u_int   max_targ;
330         u_int   i;
331         int     retval;
332
333          /* Has data been written to the file? */ 
334         if (inout == TRUE) {
335                 retval = ahd_proc_write_seeprom(ahd, buffer, length);
336                 goto done;
337         }
338
339         if (start)
340                 *start = buffer;
341
342         info.buffer     = buffer;
343         info.length     = length;
344         info.offset     = offset;
345         info.pos        = 0;
346
347         copy_info(&info, "Adaptec AIC79xx driver version: %s\n",
348                   AIC79XX_DRIVER_VERSION);
349         copy_info(&info, "%s\n", ahd->description);
350         ahd_controller_info(ahd, ahd_info);
351         copy_info(&info, "%s\n", ahd_info);
352         copy_info(&info, "Allocated SCBs: %d, SG List Length: %d\n\n",
353                   ahd->scb_data.numscbs, AHD_NSEG);
354
355         max_targ = 16;
356
357         if (ahd->seep_config == NULL)
358                 copy_info(&info, "No Serial EEPROM\n");
359         else {
360                 copy_info(&info, "Serial EEPROM:\n");
361                 for (i = 0; i < sizeof(*ahd->seep_config)/2; i++) {
362                         if (((i % 8) == 0) && (i != 0)) {
363                                 copy_info(&info, "\n");
364                         }
365                         copy_info(&info, "0x%.4x ",
366                                   ((uint16_t*)ahd->seep_config)[i]);
367                 }
368                 copy_info(&info, "\n");
369         }
370         copy_info(&info, "\n");
371
372         if ((ahd->features & AHD_WIDE) == 0)
373                 max_targ = 8;
374
375         for (i = 0; i < max_targ; i++) {
376
377                 ahd_dump_target_state(ahd, &info, ahd->our_id, 'A',
378                                       /*target_id*/i);
379         }
380         retval = info.pos > info.offset ? info.pos - info.offset : 0;
381 done:
382         return (retval);
383 }