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	ahc_dump_target_state(struct ahc_softc *ahc,
47 				      struct seq_file *m,
48 				      u_int our_id, char channel,
49 				      u_int target_id, u_int target_offset);
50 static void	ahc_dump_device_state(struct seq_file *m,
51 				      struct scsi_device *dev);
52 
53 /*
54  * Table of syncrates that don't follow the "divisible by 4"
55  * rule. This table will be expanded in future SCSI specs.
56  */
57 static const struct {
58 	u_int period_factor;
59 	u_int period;	/* in 100ths of ns */
60 } scsi_syncrates[] = {
61 	{ 0x08, 625 },	/* FAST-160 */
62 	{ 0x09, 1250 },	/* FAST-80 */
63 	{ 0x0a, 2500 },	/* FAST-40 40MHz */
64 	{ 0x0b, 3030 },	/* FAST-40 33MHz */
65 	{ 0x0c, 5000 }	/* FAST-20 */
66 };
67 
68 /*
69  * Return the frequency in kHz corresponding to the given
70  * sync period factor.
71  */
72 static u_int
73 ahc_calc_syncsrate(u_int period_factor)
74 {
75 	int i;
76 
77 	/* See if the period is in the "exception" table */
78 	for (i = 0; i < ARRAY_SIZE(scsi_syncrates); i++) {
79 
80 		if (period_factor == scsi_syncrates[i].period_factor) {
81 			/* Period in kHz */
82 			return (100000000 / scsi_syncrates[i].period);
83 		}
84 	}
85 
86 	/*
87 	 * Wasn't in the table, so use the standard
88 	 * 4 times conversion.
89 	 */
90 	return (10000000 / (period_factor * 4 * 10));
91 }
92 
93 static void
94 ahc_format_transinfo(struct seq_file *m, struct ahc_transinfo *tinfo)
95 {
96 	u_int speed;
97 	u_int freq;
98 	u_int mb;
99 
100 	speed = 3300;
101 	freq = 0;
102 	if (tinfo->offset != 0) {
103 		freq = ahc_calc_syncsrate(tinfo->period);
104 		speed = freq;
105 	}
106 	speed *= (0x01 << tinfo->width);
107 	mb = speed / 1000;
108 	if (mb > 0)
109 		seq_printf(m, "%d.%03dMB/s transfers", mb, speed % 1000);
110 	else
111 		seq_printf(m, "%dKB/s transfers", speed);
112 
113 	if (freq != 0) {
114 		seq_printf(m, " (%d.%03dMHz%s, offset %d",
115 			 freq / 1000, freq % 1000,
116 			 (tinfo->ppr_options & MSG_EXT_PPR_DT_REQ) != 0
117 			 ? " DT" : "", tinfo->offset);
118 	}
119 
120 	if (tinfo->width > 0) {
121 		if (freq != 0) {
122 			seq_puts(m, ", ");
123 		} else {
124 			seq_puts(m, " (");
125 		}
126 		seq_printf(m, "%dbit)", 8 * (0x01 << tinfo->width));
127 	} else if (freq != 0) {
128 		seq_putc(m, ')');
129 	}
130 	seq_putc(m, '\n');
131 }
132 
133 static void
134 ahc_dump_target_state(struct ahc_softc *ahc, struct seq_file *m,
135 		      u_int our_id, char channel, u_int target_id,
136 		      u_int target_offset)
137 {
138 	struct	scsi_target *starget;
139 	struct	ahc_initiator_tinfo *tinfo;
140 	struct	ahc_tmode_tstate *tstate;
141 	int	lun;
142 
143 	tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
144 				    target_id, &tstate);
145 	if ((ahc->features & AHC_TWIN) != 0)
146 		seq_printf(m, "Channel %c ", channel);
147 	seq_printf(m, "Target %d Negotiation Settings\n", target_id);
148 	seq_puts(m, "\tUser: ");
149 	ahc_format_transinfo(m, &tinfo->user);
150 	starget = ahc->platform_data->starget[target_offset];
151 	if (!starget)
152 		return;
153 
154 	seq_puts(m, "\tGoal: ");
155 	ahc_format_transinfo(m, &tinfo->goal);
156 	seq_puts(m, "\tCurr: ");
157 	ahc_format_transinfo(m, &tinfo->curr);
158 
159 	for (lun = 0; lun < AHC_NUM_LUNS; lun++) {
160 		struct scsi_device *sdev;
161 
162 		sdev = scsi_device_lookup_by_target(starget, lun);
163 
164 		if (sdev == NULL)
165 			continue;
166 
167 		ahc_dump_device_state(m, sdev);
168 	}
169 }
170 
171 static void
172 ahc_dump_device_state(struct seq_file *m, struct scsi_device *sdev)
173 {
174 	struct ahc_linux_device *dev = scsi_transport_device_data(sdev);
175 
176 	seq_printf(m, "\tChannel %c Target %d Lun %d Settings\n",
177 		  sdev->sdev_target->channel + 'A',
178 		   sdev->sdev_target->id, (u8)sdev->lun);
179 
180 	seq_printf(m, "\t\tCommands Queued %ld\n", dev->commands_issued);
181 	seq_printf(m, "\t\tCommands Active %d\n", dev->active);
182 	seq_printf(m, "\t\tCommand Openings %d\n", dev->openings);
183 	seq_printf(m, "\t\tMax Tagged Openings %d\n", dev->maxtags);
184 	seq_printf(m, "\t\tDevice Queue Frozen Count %d\n", dev->qfrozen);
185 }
186 
187 int
188 ahc_proc_write_seeprom(struct Scsi_Host *shost, char *buffer, int length)
189 {
190 	struct	ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata;
191 	struct seeprom_descriptor sd;
192 	int have_seeprom;
193 	u_long s;
194 	int paused;
195 	int written;
196 
197 	/* Default to failure. */
198 	written = -EINVAL;
199 	ahc_lock(ahc, &s);
200 	paused = ahc_is_paused(ahc);
201 	if (!paused)
202 		ahc_pause(ahc);
203 
204 	if (length != sizeof(struct seeprom_config)) {
205 		printk("ahc_proc_write_seeprom: incorrect buffer size\n");
206 		goto done;
207 	}
208 
209 	have_seeprom = ahc_verify_cksum((struct seeprom_config*)buffer);
210 	if (have_seeprom == 0) {
211 		printk("ahc_proc_write_seeprom: cksum verification failed\n");
212 		goto done;
213 	}
214 
215 	sd.sd_ahc = ahc;
216 #if AHC_PCI_CONFIG > 0
217 	if ((ahc->chip & AHC_PCI) != 0) {
218 		sd.sd_control_offset = SEECTL;
219 		sd.sd_status_offset = SEECTL;
220 		sd.sd_dataout_offset = SEECTL;
221 		if (ahc->flags & AHC_LARGE_SEEPROM)
222 			sd.sd_chip = C56_66;
223 		else
224 			sd.sd_chip = C46;
225 		sd.sd_MS = SEEMS;
226 		sd.sd_RDY = SEERDY;
227 		sd.sd_CS = SEECS;
228 		sd.sd_CK = SEECK;
229 		sd.sd_DO = SEEDO;
230 		sd.sd_DI = SEEDI;
231 		have_seeprom = ahc_acquire_seeprom(ahc, &sd);
232 	} else
233 #endif
234 	if ((ahc->chip & AHC_VL) != 0) {
235 		sd.sd_control_offset = SEECTL_2840;
236 		sd.sd_status_offset = STATUS_2840;
237 		sd.sd_dataout_offset = STATUS_2840;
238 		sd.sd_chip = C46;
239 		sd.sd_MS = 0;
240 		sd.sd_RDY = EEPROM_TF;
241 		sd.sd_CS = CS_2840;
242 		sd.sd_CK = CK_2840;
243 		sd.sd_DO = DO_2840;
244 		sd.sd_DI = DI_2840;
245 		have_seeprom = TRUE;
246 	} else {
247 		printk("ahc_proc_write_seeprom: unsupported adapter type\n");
248 		goto done;
249 	}
250 
251 	if (!have_seeprom) {
252 		printk("ahc_proc_write_seeprom: No Serial EEPROM\n");
253 		goto done;
254 	} else {
255 		u_int start_addr;
256 
257 		if (ahc->seep_config == NULL) {
258 			ahc->seep_config = kmalloc(sizeof(*ahc->seep_config),
259 						   GFP_ATOMIC);
260 			if (ahc->seep_config == NULL) {
261 				printk("aic7xxx: Unable to allocate serial "
262 				       "eeprom buffer.  Write failing\n");
263 				goto done;
264 			}
265 		}
266 		printk("aic7xxx: Writing Serial EEPROM\n");
267 		start_addr = 32 * (ahc->channel - 'A');
268 		ahc_write_seeprom(&sd, (u_int16_t *)buffer, start_addr,
269 				  sizeof(struct seeprom_config)/2);
270 		ahc_read_seeprom(&sd, (uint16_t *)ahc->seep_config,
271 				 start_addr, sizeof(struct seeprom_config)/2);
272 #if AHC_PCI_CONFIG > 0
273 		if ((ahc->chip & AHC_VL) == 0)
274 			ahc_release_seeprom(&sd);
275 #endif
276 		written = length;
277 	}
278 
279 done:
280 	if (!paused)
281 		ahc_unpause(ahc);
282 	ahc_unlock(ahc, &s);
283 	return (written);
284 }
285 
286 /*
287  * Return information to handle /proc support for the driver.
288  */
289 int
290 ahc_linux_show_info(struct seq_file *m, struct Scsi_Host *shost)
291 {
292 	struct	ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata;
293 	char	ahc_info[256];
294 	u_int	max_targ;
295 	u_int	i;
296 
297 	seq_printf(m, "Adaptec AIC7xxx driver version: %s\n",
298 		  AIC7XXX_DRIVER_VERSION);
299 	seq_printf(m, "%s\n", ahc->description);
300 	ahc_controller_info(ahc, ahc_info);
301 	seq_printf(m, "%s\n", ahc_info);
302 	seq_printf(m, "Allocated SCBs: %d, SG List Length: %d\n\n",
303 		  ahc->scb_data->numscbs, AHC_NSEG);
304 
305 
306 	if (ahc->seep_config == NULL)
307 		seq_puts(m, "No Serial EEPROM\n");
308 	else {
309 		seq_puts(m, "Serial EEPROM:\n");
310 		for (i = 0; i < sizeof(*ahc->seep_config)/2; i++) {
311 			if (((i % 8) == 0) && (i != 0)) {
312 				seq_putc(m, '\n');
313 			}
314 			seq_printf(m, "0x%.4x ",
315 				  ((uint16_t*)ahc->seep_config)[i]);
316 		}
317 		seq_putc(m, '\n');
318 	}
319 	seq_putc(m, '\n');
320 
321 	max_targ = 16;
322 	if ((ahc->features & (AHC_WIDE|AHC_TWIN)) == 0)
323 		max_targ = 8;
324 
325 	for (i = 0; i < max_targ; i++) {
326 		u_int our_id;
327 		u_int target_id;
328 		char channel;
329 
330 		channel = 'A';
331 		our_id = ahc->our_id;
332 		target_id = i;
333 		if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
334 			channel = 'B';
335 			our_id = ahc->our_id_b;
336 			target_id = i % 8;
337 		}
338 
339 		ahc_dump_target_state(ahc, m, our_id,
340 				      channel, target_id, i);
341 	}
342 	return 0;
343 }
344