Merge master.kernel.org:/pub/scm/linux/kernel/git/kyle/parisc-2.6
[linux-2.6] / drivers / scsi / aic7xxx / aic7xxx_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/aic7xxx_proc.c#29 $
41  */
42 #include "aic7xxx_osm.h"
43 #include "aic7xxx_inline.h"
44 #include "aic7xxx_93cx6.h"
45
46 static void     copy_mem_info(struct info_str *info, char *data, int len);
47 static int      copy_info(struct info_str *info, char *fmt, ...);
48 static void     ahc_dump_target_state(struct ahc_softc *ahc,
49                                       struct info_str *info,
50                                       u_int our_id, char channel,
51                                       u_int target_id, u_int target_offset);
52 static void     ahc_dump_device_state(struct info_str *info,
53                                       struct scsi_device *dev);
54 static int      ahc_proc_write_seeprom(struct ahc_softc *ahc,
55                                        char *buffer, int length);
56
57 /*
58  * Table of syncrates that don't follow the "divisible by 4"
59  * rule. This table will be expanded in future SCSI specs.
60  */
61 static struct {
62         u_int period_factor;
63         u_int period;   /* in 100ths of ns */
64 } scsi_syncrates[] = {
65         { 0x08, 625 },  /* FAST-160 */
66         { 0x09, 1250 }, /* FAST-80 */
67         { 0x0a, 2500 }, /* FAST-40 40MHz */
68         { 0x0b, 3030 }, /* FAST-40 33MHz */
69         { 0x0c, 5000 }  /* FAST-20 */
70 };
71
72 /*
73  * Return the frequency in kHz corresponding to the given
74  * sync period factor.
75  */
76 static u_int
77 ahc_calc_syncsrate(u_int period_factor)
78 {
79         int i;
80
81         /* See if the period is in the "exception" table */
82         for (i = 0; i < ARRAY_SIZE(scsi_syncrates); i++) {
83
84                 if (period_factor == scsi_syncrates[i].period_factor) {
85                         /* Period in kHz */
86                         return (100000000 / scsi_syncrates[i].period);
87                 }
88         }
89
90         /*
91          * Wasn't in the table, so use the standard
92          * 4 times conversion.
93          */
94         return (10000000 / (period_factor * 4 * 10));
95 }
96
97
98 static void
99 copy_mem_info(struct info_str *info, char *data, int len)
100 {
101         if (info->pos + len > info->offset + info->length)
102                 len = info->offset + info->length - info->pos;
103
104         if (info->pos + len < info->offset) {
105                 info->pos += len;
106                 return;
107         }
108
109         if (info->pos < info->offset) {
110                 off_t partial;
111
112                 partial = info->offset - info->pos;
113                 data += partial;
114                 info->pos += partial;
115                 len  -= partial;
116         }
117
118         if (len > 0) {
119                 memcpy(info->buffer, data, len);
120                 info->pos += len;
121                 info->buffer += len;
122         }
123 }
124
125 static int
126 copy_info(struct info_str *info, char *fmt, ...)
127 {
128         va_list args;
129         char buf[256];
130         int len;
131
132         va_start(args, fmt);
133         len = vsprintf(buf, fmt, args);
134         va_end(args);
135
136         copy_mem_info(info, buf, len);
137         return (len);
138 }
139
140 void
141 ahc_format_transinfo(struct info_str *info, struct ahc_transinfo *tinfo)
142 {
143         u_int speed;
144         u_int freq;
145         u_int mb;
146
147         speed = 3300;
148         freq = 0;
149         if (tinfo->offset != 0) {
150                 freq = ahc_calc_syncsrate(tinfo->period);
151                 speed = freq;
152         }
153         speed *= (0x01 << tinfo->width);
154         mb = speed / 1000;
155         if (mb > 0)
156                 copy_info(info, "%d.%03dMB/s transfers", mb, speed % 1000);
157         else
158                 copy_info(info, "%dKB/s transfers", speed);
159
160         if (freq != 0) {
161                 copy_info(info, " (%d.%03dMHz%s, offset %d",
162                          freq / 1000, freq % 1000,
163                          (tinfo->ppr_options & MSG_EXT_PPR_DT_REQ) != 0
164                          ? " DT" : "", tinfo->offset);
165         }
166
167         if (tinfo->width > 0) {
168                 if (freq != 0) {
169                         copy_info(info, ", ");
170                 } else {
171                         copy_info(info, " (");
172                 }
173                 copy_info(info, "%dbit)", 8 * (0x01 << tinfo->width));
174         } else if (freq != 0) {
175                 copy_info(info, ")");
176         }
177         copy_info(info, "\n");
178 }
179
180 static void
181 ahc_dump_target_state(struct ahc_softc *ahc, struct info_str *info,
182                       u_int our_id, char channel, u_int target_id,
183                       u_int target_offset)
184 {
185         struct  scsi_target *starget;
186         struct  ahc_initiator_tinfo *tinfo;
187         struct  ahc_tmode_tstate *tstate;
188         int     lun;
189
190         tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
191                                     target_id, &tstate);
192         if ((ahc->features & AHC_TWIN) != 0)
193                 copy_info(info, "Channel %c ", channel);
194         copy_info(info, "Target %d Negotiation Settings\n", target_id);
195         copy_info(info, "\tUser: ");
196         ahc_format_transinfo(info, &tinfo->user);
197         starget = ahc->platform_data->starget[target_offset];
198         if (!starget)
199                 return;
200
201         copy_info(info, "\tGoal: ");
202         ahc_format_transinfo(info, &tinfo->goal);
203         copy_info(info, "\tCurr: ");
204         ahc_format_transinfo(info, &tinfo->curr);
205
206         for (lun = 0; lun < AHC_NUM_LUNS; lun++) {
207                 struct scsi_device *sdev;
208
209                 sdev = scsi_device_lookup_by_target(starget, lun);
210
211                 if (sdev == NULL)
212                         continue;
213
214                 ahc_dump_device_state(info, sdev);
215         }
216 }
217
218 static void
219 ahc_dump_device_state(struct info_str *info, struct scsi_device *sdev)
220 {
221         struct ahc_linux_device *dev = scsi_transport_device_data(sdev);
222
223         copy_info(info, "\tChannel %c Target %d Lun %d Settings\n",
224                   sdev->sdev_target->channel + 'A',
225                   sdev->sdev_target->id, sdev->lun);
226
227         copy_info(info, "\t\tCommands Queued %ld\n", dev->commands_issued);
228         copy_info(info, "\t\tCommands Active %d\n", dev->active);
229         copy_info(info, "\t\tCommand Openings %d\n", dev->openings);
230         copy_info(info, "\t\tMax Tagged Openings %d\n", dev->maxtags);
231         copy_info(info, "\t\tDevice Queue Frozen Count %d\n", dev->qfrozen);
232 }
233
234 static int
235 ahc_proc_write_seeprom(struct ahc_softc *ahc, char *buffer, int length)
236 {
237         struct seeprom_descriptor sd;
238         int have_seeprom;
239         u_long s;
240         int paused;
241         int written;
242
243         /* Default to failure. */
244         written = -EINVAL;
245         ahc_lock(ahc, &s);
246         paused = ahc_is_paused(ahc);
247         if (!paused)
248                 ahc_pause(ahc);
249
250         if (length != sizeof(struct seeprom_config)) {
251                 printf("ahc_proc_write_seeprom: incorrect buffer size\n");
252                 goto done;
253         }
254
255         have_seeprom = ahc_verify_cksum((struct seeprom_config*)buffer);
256         if (have_seeprom == 0) {
257                 printf("ahc_proc_write_seeprom: cksum verification failed\n");
258                 goto done;
259         }
260
261         sd.sd_ahc = ahc;
262 #if AHC_PCI_CONFIG > 0
263         if ((ahc->chip & AHC_PCI) != 0) {
264                 sd.sd_control_offset = SEECTL;
265                 sd.sd_status_offset = SEECTL;
266                 sd.sd_dataout_offset = SEECTL;
267                 if (ahc->flags & AHC_LARGE_SEEPROM)
268                         sd.sd_chip = C56_66;
269                 else
270                         sd.sd_chip = C46;
271                 sd.sd_MS = SEEMS;
272                 sd.sd_RDY = SEERDY;
273                 sd.sd_CS = SEECS;
274                 sd.sd_CK = SEECK;
275                 sd.sd_DO = SEEDO;
276                 sd.sd_DI = SEEDI;
277                 have_seeprom = ahc_acquire_seeprom(ahc, &sd);
278         } else
279 #endif
280         if ((ahc->chip & AHC_VL) != 0) {
281                 sd.sd_control_offset = SEECTL_2840;
282                 sd.sd_status_offset = STATUS_2840;
283                 sd.sd_dataout_offset = STATUS_2840;             
284                 sd.sd_chip = C46;
285                 sd.sd_MS = 0;
286                 sd.sd_RDY = EEPROM_TF;
287                 sd.sd_CS = CS_2840;
288                 sd.sd_CK = CK_2840;
289                 sd.sd_DO = DO_2840;
290                 sd.sd_DI = DI_2840;
291                 have_seeprom = TRUE;
292         } else {
293                 printf("ahc_proc_write_seeprom: unsupported adapter type\n");
294                 goto done;
295         }
296
297         if (!have_seeprom) {
298                 printf("ahc_proc_write_seeprom: No Serial EEPROM\n");
299                 goto done;
300         } else {
301                 u_int start_addr;
302
303                 if (ahc->seep_config == NULL) {
304                         ahc->seep_config = malloc(sizeof(*ahc->seep_config),
305                                                   M_DEVBUF, M_NOWAIT);
306                         if (ahc->seep_config == NULL) {
307                                 printf("aic7xxx: Unable to allocate serial "
308                                        "eeprom buffer.  Write failing\n");
309                                 goto done;
310                         }
311                 }
312                 printf("aic7xxx: Writing Serial EEPROM\n");
313                 start_addr = 32 * (ahc->channel - 'A');
314                 ahc_write_seeprom(&sd, (u_int16_t *)buffer, start_addr,
315                                   sizeof(struct seeprom_config)/2);
316                 ahc_read_seeprom(&sd, (uint16_t *)ahc->seep_config,
317                                  start_addr, sizeof(struct seeprom_config)/2);
318 #if AHC_PCI_CONFIG > 0
319                 if ((ahc->chip & AHC_VL) == 0)
320                         ahc_release_seeprom(&sd);
321 #endif
322                 written = length;
323         }
324
325 done:
326         if (!paused)
327                 ahc_unpause(ahc);
328         ahc_unlock(ahc, &s);
329         return (written);
330 }
331
332 /*
333  * Return information to handle /proc support for the driver.
334  */
335 int
336 ahc_linux_proc_info(struct Scsi_Host *shost, char *buffer, char **start,
337                     off_t offset, int length, int inout)
338 {
339         struct  ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata;
340         struct  info_str info;
341         char    ahc_info[256];
342         u_int   max_targ;
343         u_int   i;
344         int     retval;
345
346          /* Has data been written to the file? */ 
347         if (inout == TRUE) {
348                 retval = ahc_proc_write_seeprom(ahc, buffer, length);
349                 goto done;
350         }
351
352         if (start)
353                 *start = buffer;
354
355         info.buffer     = buffer;
356         info.length     = length;
357         info.offset     = offset;
358         info.pos        = 0;
359
360         copy_info(&info, "Adaptec AIC7xxx driver version: %s\n",
361                   AIC7XXX_DRIVER_VERSION);
362         copy_info(&info, "%s\n", ahc->description);
363         ahc_controller_info(ahc, ahc_info);
364         copy_info(&info, "%s\n", ahc_info);
365         copy_info(&info, "Allocated SCBs: %d, SG List Length: %d\n\n",
366                   ahc->scb_data->numscbs, AHC_NSEG);
367
368
369         if (ahc->seep_config == NULL)
370                 copy_info(&info, "No Serial EEPROM\n");
371         else {
372                 copy_info(&info, "Serial EEPROM:\n");
373                 for (i = 0; i < sizeof(*ahc->seep_config)/2; i++) {
374                         if (((i % 8) == 0) && (i != 0)) {
375                                 copy_info(&info, "\n");
376                         }
377                         copy_info(&info, "0x%.4x ",
378                                   ((uint16_t*)ahc->seep_config)[i]);
379                 }
380                 copy_info(&info, "\n");
381         }
382         copy_info(&info, "\n");
383
384         max_targ = 16;
385         if ((ahc->features & (AHC_WIDE|AHC_TWIN)) == 0)
386                 max_targ = 8;
387
388         for (i = 0; i < max_targ; i++) {
389                 u_int our_id;
390                 u_int target_id;
391                 char channel;
392
393                 channel = 'A';
394                 our_id = ahc->our_id;
395                 target_id = i;
396                 if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
397                         channel = 'B';
398                         our_id = ahc->our_id_b;
399                         target_id = i % 8;
400                 }
401
402                 ahc_dump_target_state(ahc, &info, our_id,
403                                       channel, target_id, i);
404         }
405         retval = info.pos > info.offset ? info.pos - info.offset : 0;
406 done:
407         return (retval);
408 }