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 const 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 		printk("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 		printk("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 		printk("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 = kmalloc(sizeof(*ahd->seep_config), GFP_ATOMIC);
294 			if (ahd->seep_config == NULL) {
295 				printk("aic79xx: Unable to allocate serial "
296 				       "eeprom buffer.  Write failing\n");
297 				goto done;
298 			}
299 		}
300 		printk("aic79xx: Writing Serial EEPROM\n");
301 		start_addr = 32 * (ahd->channel - 'A');
302 		ahd_write_seeprom(ahd, (u_int16_t *)buffer, start_addr,
303 				  sizeof(struct seeprom_config)/2);
304 		ahd_read_seeprom(ahd, (uint16_t *)ahd->seep_config,
305 				 start_addr, sizeof(struct seeprom_config)/2,
306 				 /*ByteStream*/FALSE);
307 		ahd_release_seeprom(ahd);
308 		written = length;
309 	}
310 
311 done:
312 	ahd_restore_modes(ahd, saved_modes);
313 	if (!paused)
314 		ahd_unpause(ahd);
315 	ahd_unlock(ahd, &s);
316 	return (written);
317 }
318 /*
319  * Return information to handle /proc support for the driver.
320  */
321 int
322 ahd_linux_proc_info(struct Scsi_Host *shost, char *buffer, char **start,
323 		    off_t offset, int length, int inout)
324 {
325 	struct	ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
326 	struct	info_str info;
327 	char	ahd_info[256];
328 	u_int	max_targ;
329 	u_int	i;
330 	int	retval;
331 
332 	 /* Has data been written to the file? */
333 	if (inout == TRUE) {
334 		retval = ahd_proc_write_seeprom(ahd, buffer, length);
335 		goto done;
336 	}
337 
338 	if (start)
339 		*start = buffer;
340 
341 	info.buffer	= buffer;
342 	info.length	= length;
343 	info.offset	= offset;
344 	info.pos	= 0;
345 
346 	copy_info(&info, "Adaptec AIC79xx driver version: %s\n",
347 		  AIC79XX_DRIVER_VERSION);
348 	copy_info(&info, "%s\n", ahd->description);
349 	ahd_controller_info(ahd, ahd_info);
350 	copy_info(&info, "%s\n", ahd_info);
351 	copy_info(&info, "Allocated SCBs: %d, SG List Length: %d\n\n",
352 		  ahd->scb_data.numscbs, AHD_NSEG);
353 
354 	max_targ = 16;
355 
356 	if (ahd->seep_config == NULL)
357 		copy_info(&info, "No Serial EEPROM\n");
358 	else {
359 		copy_info(&info, "Serial EEPROM:\n");
360 		for (i = 0; i < sizeof(*ahd->seep_config)/2; i++) {
361 			if (((i % 8) == 0) && (i != 0)) {
362 				copy_info(&info, "\n");
363 			}
364 			copy_info(&info, "0x%.4x ",
365 				  ((uint16_t*)ahd->seep_config)[i]);
366 		}
367 		copy_info(&info, "\n");
368 	}
369 	copy_info(&info, "\n");
370 
371 	if ((ahd->features & AHD_WIDE) == 0)
372 		max_targ = 8;
373 
374 	for (i = 0; i < max_targ; i++) {
375 
376 		ahd_dump_target_state(ahd, &info, ahd->our_id, 'A',
377 				      /*target_id*/i);
378 	}
379 	retval = info.pos > info.offset ? info.pos - info.offset : 0;
380 done:
381 	return (retval);
382 }
383