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	ahd_dump_target_state(struct ahd_softc *ahd,
46 				      struct seq_file *m,
47 				      u_int our_id, char channel,
48 				      u_int target_id);
49 static void	ahd_dump_device_state(struct seq_file *m,
50 				      struct scsi_device *sdev);
51 
52 /*
53  * Table of syncrates that don't follow the "divisible by 4"
54  * rule. This table will be expanded in future SCSI specs.
55  */
56 static const struct {
57 	u_int period_factor;
58 	u_int period;	/* in 100ths of ns */
59 } scsi_syncrates[] = {
60 	{ 0x08, 625 },	/* FAST-160 */
61 	{ 0x09, 1250 },	/* FAST-80 */
62 	{ 0x0a, 2500 },	/* FAST-40 40MHz */
63 	{ 0x0b, 3030 },	/* FAST-40 33MHz */
64 	{ 0x0c, 5000 }	/* FAST-20 */
65 };
66 
67 /*
68  * Return the frequency in kHz corresponding to the given
69  * sync period factor.
70  */
71 static u_int
72 ahd_calc_syncsrate(u_int period_factor)
73 {
74 	int i;
75 
76 	/* See if the period is in the "exception" table */
77 	for (i = 0; i < ARRAY_SIZE(scsi_syncrates); i++) {
78 
79 		if (period_factor == scsi_syncrates[i].period_factor) {
80 			/* Period in kHz */
81 			return (100000000 / scsi_syncrates[i].period);
82 		}
83 	}
84 
85 	/*
86 	 * Wasn't in the table, so use the standard
87 	 * 4 times conversion.
88 	 */
89 	return (10000000 / (period_factor * 4 * 10));
90 }
91 
92 static void
93 ahd_format_transinfo(struct seq_file *m, struct ahd_transinfo *tinfo)
94 {
95 	u_int speed;
96 	u_int freq;
97 	u_int mb;
98 
99 	if (tinfo->period == AHD_PERIOD_UNKNOWN) {
100 		seq_printf(m, "Renegotiation Pending\n");
101 		return;
102 	}
103         speed = 3300;
104         freq = 0;
105 	if (tinfo->offset != 0) {
106 		freq = ahd_calc_syncsrate(tinfo->period);
107 		speed = freq;
108 	}
109 	speed *= (0x01 << tinfo->width);
110         mb = speed / 1000;
111         if (mb > 0)
112 		seq_printf(m, "%d.%03dMB/s transfers", mb, speed % 1000);
113         else
114 		seq_printf(m, "%dKB/s transfers", speed);
115 
116 	if (freq != 0) {
117 		int	printed_options;
118 
119 		printed_options = 0;
120 		seq_printf(m, " (%d.%03dMHz", freq / 1000, freq % 1000);
121 		if ((tinfo->ppr_options & MSG_EXT_PPR_RD_STRM) != 0) {
122 			seq_printf(m, " RDSTRM");
123 			printed_options++;
124 		}
125 		if ((tinfo->ppr_options & MSG_EXT_PPR_DT_REQ) != 0) {
126 			seq_printf(m, "%s", printed_options ? "|DT" : " DT");
127 			printed_options++;
128 		}
129 		if ((tinfo->ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
130 			seq_printf(m, "%s", printed_options ? "|IU" : " IU");
131 			printed_options++;
132 		}
133 		if ((tinfo->ppr_options & MSG_EXT_PPR_RTI) != 0) {
134 			seq_printf(m, "%s",
135 				  printed_options ? "|RTI" : " RTI");
136 			printed_options++;
137 		}
138 		if ((tinfo->ppr_options & MSG_EXT_PPR_QAS_REQ) != 0) {
139 			seq_printf(m, "%s",
140 				  printed_options ? "|QAS" : " QAS");
141 			printed_options++;
142 		}
143 	}
144 
145 	if (tinfo->width > 0) {
146 		if (freq != 0) {
147 			seq_printf(m, ", ");
148 		} else {
149 			seq_printf(m, " (");
150 		}
151 		seq_printf(m, "%dbit)", 8 * (0x01 << tinfo->width));
152 	} else if (freq != 0) {
153 		seq_printf(m, ")");
154 	}
155 	seq_printf(m, "\n");
156 }
157 
158 static void
159 ahd_dump_target_state(struct ahd_softc *ahd, struct seq_file *m,
160 		      u_int our_id, char channel, u_int target_id)
161 {
162 	struct  scsi_target *starget;
163 	struct	ahd_initiator_tinfo *tinfo;
164 	struct	ahd_tmode_tstate *tstate;
165 	int	lun;
166 
167 	tinfo = ahd_fetch_transinfo(ahd, channel, our_id,
168 				    target_id, &tstate);
169 	seq_printf(m, "Target %d Negotiation Settings\n", target_id);
170 	seq_printf(m, "\tUser: ");
171 	ahd_format_transinfo(m, &tinfo->user);
172 	starget = ahd->platform_data->starget[target_id];
173 	if (starget == NULL)
174 		return;
175 
176 	seq_printf(m, "\tGoal: ");
177 	ahd_format_transinfo(m, &tinfo->goal);
178 	seq_printf(m, "\tCurr: ");
179 	ahd_format_transinfo(m, &tinfo->curr);
180 
181 	for (lun = 0; lun < AHD_NUM_LUNS; lun++) {
182 		struct scsi_device *dev;
183 
184 		dev = scsi_device_lookup_by_target(starget, lun);
185 
186 		if (dev == NULL)
187 			continue;
188 
189 		ahd_dump_device_state(m, dev);
190 	}
191 }
192 
193 static void
194 ahd_dump_device_state(struct seq_file *m, struct scsi_device *sdev)
195 {
196 	struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
197 
198 	seq_printf(m, "\tChannel %c Target %d Lun %d Settings\n",
199 		  sdev->sdev_target->channel + 'A',
200 		   sdev->sdev_target->id, (u8)sdev->lun);
201 
202 	seq_printf(m, "\t\tCommands Queued %ld\n", dev->commands_issued);
203 	seq_printf(m, "\t\tCommands Active %d\n", dev->active);
204 	seq_printf(m, "\t\tCommand Openings %d\n", dev->openings);
205 	seq_printf(m, "\t\tMax Tagged Openings %d\n", dev->maxtags);
206 	seq_printf(m, "\t\tDevice Queue Frozen Count %d\n", dev->qfrozen);
207 }
208 
209 int
210 ahd_proc_write_seeprom(struct Scsi_Host *shost, char *buffer, int length)
211 {
212 	struct	ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
213 	ahd_mode_state saved_modes;
214 	int have_seeprom;
215 	u_long s;
216 	int paused;
217 	int written;
218 
219 	/* Default to failure. */
220 	written = -EINVAL;
221 	ahd_lock(ahd, &s);
222 	paused = ahd_is_paused(ahd);
223 	if (!paused)
224 		ahd_pause(ahd);
225 
226 	saved_modes = ahd_save_modes(ahd);
227 	ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
228 	if (length != sizeof(struct seeprom_config)) {
229 		printk("ahd_proc_write_seeprom: incorrect buffer size\n");
230 		goto done;
231 	}
232 
233 	have_seeprom = ahd_verify_cksum((struct seeprom_config*)buffer);
234 	if (have_seeprom == 0) {
235 		printk("ahd_proc_write_seeprom: cksum verification failed\n");
236 		goto done;
237 	}
238 
239 	have_seeprom = ahd_acquire_seeprom(ahd);
240 	if (!have_seeprom) {
241 		printk("ahd_proc_write_seeprom: No Serial EEPROM\n");
242 		goto done;
243 	} else {
244 		u_int start_addr;
245 
246 		if (ahd->seep_config == NULL) {
247 			ahd->seep_config = kmalloc(sizeof(*ahd->seep_config), GFP_ATOMIC);
248 			if (ahd->seep_config == NULL) {
249 				printk("aic79xx: Unable to allocate serial "
250 				       "eeprom buffer.  Write failing\n");
251 				goto done;
252 			}
253 		}
254 		printk("aic79xx: Writing Serial EEPROM\n");
255 		start_addr = 32 * (ahd->channel - 'A');
256 		ahd_write_seeprom(ahd, (u_int16_t *)buffer, start_addr,
257 				  sizeof(struct seeprom_config)/2);
258 		ahd_read_seeprom(ahd, (uint16_t *)ahd->seep_config,
259 				 start_addr, sizeof(struct seeprom_config)/2,
260 				 /*ByteStream*/FALSE);
261 		ahd_release_seeprom(ahd);
262 		written = length;
263 	}
264 
265 done:
266 	ahd_restore_modes(ahd, saved_modes);
267 	if (!paused)
268 		ahd_unpause(ahd);
269 	ahd_unlock(ahd, &s);
270 	return (written);
271 }
272 /*
273  * Return information to handle /proc support for the driver.
274  */
275 int
276 ahd_linux_show_info(struct seq_file *m, struct Scsi_Host *shost)
277 {
278 	struct	ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
279 	char	ahd_info[256];
280 	u_int	max_targ;
281 	u_int	i;
282 
283 	seq_printf(m, "Adaptec AIC79xx driver version: %s\n",
284 		  AIC79XX_DRIVER_VERSION);
285 	seq_printf(m, "%s\n", ahd->description);
286 	ahd_controller_info(ahd, ahd_info);
287 	seq_printf(m, "%s\n", ahd_info);
288 	seq_printf(m, "Allocated SCBs: %d, SG List Length: %d\n\n",
289 		  ahd->scb_data.numscbs, AHD_NSEG);
290 
291 	max_targ = 16;
292 
293 	if (ahd->seep_config == NULL)
294 		seq_printf(m, "No Serial EEPROM\n");
295 	else {
296 		seq_printf(m, "Serial EEPROM:\n");
297 		for (i = 0; i < sizeof(*ahd->seep_config)/2; i++) {
298 			if (((i % 8) == 0) && (i != 0)) {
299 				seq_printf(m, "\n");
300 			}
301 			seq_printf(m, "0x%.4x ",
302 				  ((uint16_t*)ahd->seep_config)[i]);
303 		}
304 		seq_printf(m, "\n");
305 	}
306 	seq_printf(m, "\n");
307 
308 	if ((ahd->features & AHD_WIDE) == 0)
309 		max_targ = 8;
310 
311 	for (i = 0; i < max_targ; i++) {
312 
313 		ahd_dump_target_state(ahd, m, ahd->our_id, 'A',
314 				      /*target_id*/i);
315 	}
316 	return 0;
317 }
318