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
45static 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);
49static 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 */
56static 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 */
71static u_int
72ahd_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
92static void
93ahd_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_puts(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_puts(m, " RDSTRM");
123			printed_options++;
124		}
125		if ((tinfo->ppr_options & MSG_EXT_PPR_DT_REQ) != 0) {
126			seq_puts(m, printed_options ? "|DT" : " DT");
127			printed_options++;
128		}
129		if ((tinfo->ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
130			seq_puts(m, printed_options ? "|IU" : " IU");
131			printed_options++;
132		}
133		if ((tinfo->ppr_options & MSG_EXT_PPR_RTI) != 0) {
134			seq_puts(m, printed_options ? "|RTI" : " RTI");
135			printed_options++;
136		}
137		if ((tinfo->ppr_options & MSG_EXT_PPR_QAS_REQ) != 0) {
138			seq_puts(m, printed_options ? "|QAS" : " QAS");
139			printed_options++;
140		}
141	}
142
143	if (tinfo->width > 0) {
144		if (freq != 0) {
145			seq_puts(m, ", ");
146		} else {
147			seq_puts(m, " (");
148		}
149		seq_printf(m, "%dbit)", 8 * (0x01 << tinfo->width));
150	} else if (freq != 0) {
151		seq_putc(m, ')');
152	}
153	seq_putc(m, '\n');
154}
155
156static void
157ahd_dump_target_state(struct ahd_softc *ahd, struct seq_file *m,
158		      u_int our_id, char channel, u_int target_id)
159{
160	struct  scsi_target *starget;
161	struct	ahd_initiator_tinfo *tinfo;
162	struct	ahd_tmode_tstate *tstate;
163	int	lun;
164
165	tinfo = ahd_fetch_transinfo(ahd, channel, our_id,
166				    target_id, &tstate);
167	seq_printf(m, "Target %d Negotiation Settings\n", target_id);
168	seq_puts(m, "\tUser: ");
169	ahd_format_transinfo(m, &tinfo->user);
170	starget = ahd->platform_data->starget[target_id];
171	if (starget == NULL)
172		return;
173
174	seq_puts(m, "\tGoal: ");
175	ahd_format_transinfo(m, &tinfo->goal);
176	seq_puts(m, "\tCurr: ");
177	ahd_format_transinfo(m, &tinfo->curr);
178
179	for (lun = 0; lun < AHD_NUM_LUNS; lun++) {
180		struct scsi_device *dev;
181
182		dev = scsi_device_lookup_by_target(starget, lun);
183
184		if (dev == NULL)
185			continue;
186
187		ahd_dump_device_state(m, dev);
188	}
189}
190
191static void
192ahd_dump_device_state(struct seq_file *m, struct scsi_device *sdev)
193{
194	struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
195
196	seq_printf(m, "\tChannel %c Target %d Lun %d Settings\n",
197		  sdev->sdev_target->channel + 'A',
198		   sdev->sdev_target->id, (u8)sdev->lun);
199
200	seq_printf(m, "\t\tCommands Queued %ld\n", dev->commands_issued);
201	seq_printf(m, "\t\tCommands Active %d\n", dev->active);
202	seq_printf(m, "\t\tCommand Openings %d\n", dev->openings);
203	seq_printf(m, "\t\tMax Tagged Openings %d\n", dev->maxtags);
204	seq_printf(m, "\t\tDevice Queue Frozen Count %d\n", dev->qfrozen);
205}
206
207int
208ahd_proc_write_seeprom(struct Scsi_Host *shost, char *buffer, int length)
209{
210	struct	ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
211	ahd_mode_state saved_modes;
212	int have_seeprom;
213	u_long s;
214	int paused;
215	int written;
216
217	/* Default to failure. */
218	written = -EINVAL;
219	ahd_lock(ahd, &s);
220	paused = ahd_is_paused(ahd);
221	if (!paused)
222		ahd_pause(ahd);
223
224	saved_modes = ahd_save_modes(ahd);
225	ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
226	if (length != sizeof(struct seeprom_config)) {
227		printk("ahd_proc_write_seeprom: incorrect buffer size\n");
228		goto done;
229	}
230
231	have_seeprom = ahd_verify_cksum((struct seeprom_config*)buffer);
232	if (have_seeprom == 0) {
233		printk("ahd_proc_write_seeprom: cksum verification failed\n");
234		goto done;
235	}
236
237	have_seeprom = ahd_acquire_seeprom(ahd);
238	if (!have_seeprom) {
239		printk("ahd_proc_write_seeprom: No Serial EEPROM\n");
240		goto done;
241	} else {
242		u_int start_addr;
243
244		if (ahd->seep_config == NULL) {
245			ahd->seep_config = kmalloc(sizeof(*ahd->seep_config),
246						   GFP_ATOMIC);
247			if (ahd->seep_config == NULL) {
248				printk("aic79xx: Unable to allocate serial "
249				       "eeprom buffer.  Write failing\n");
250				goto done;
251			}
252		}
253		printk("aic79xx: Writing Serial EEPROM\n");
254		start_addr = 32 * (ahd->channel - 'A');
255		ahd_write_seeprom(ahd, (u_int16_t *)buffer, start_addr,
256				  sizeof(struct seeprom_config)/2);
257		ahd_read_seeprom(ahd, (uint16_t *)ahd->seep_config,
258				 start_addr, sizeof(struct seeprom_config)/2,
259				 /*ByteStream*/FALSE);
260		ahd_release_seeprom(ahd);
261		written = length;
262	}
263
264done:
265	ahd_restore_modes(ahd, saved_modes);
266	if (!paused)
267		ahd_unpause(ahd);
268	ahd_unlock(ahd, &s);
269	return (written);
270}
271/*
272 * Return information to handle /proc support for the driver.
273 */
274int
275ahd_linux_show_info(struct seq_file *m, struct Scsi_Host *shost)
276{
277	struct	ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
278	char	ahd_info[256];
279	u_int	max_targ;
280	u_int	i;
281
282	seq_printf(m, "Adaptec AIC79xx driver version: %s\n",
283		  AIC79XX_DRIVER_VERSION);
284	seq_printf(m, "%s\n", ahd->description);
285	ahd_controller_info(ahd, ahd_info);
286	seq_printf(m, "%s\n", ahd_info);
287	seq_printf(m, "Allocated SCBs: %d, SG List Length: %d\n\n",
288		  ahd->scb_data.numscbs, AHD_NSEG);
289
290	max_targ = 16;
291
292	if (ahd->seep_config == NULL)
293		seq_puts(m, "No Serial EEPROM\n");
294	else {
295		seq_puts(m, "Serial EEPROM:\n");
296		for (i = 0; i < sizeof(*ahd->seep_config)/2; i++) {
297			if (((i % 8) == 0) && (i != 0)) {
298				seq_putc(m, '\n');
299			}
300			seq_printf(m, "0x%.4x ",
301				  ((uint16_t*)ahd->seep_config)[i]);
302		}
303		seq_putc(m, '\n');
304	}
305	seq_putc(m, '\n');
306
307	if ((ahd->features & AHD_WIDE) == 0)
308		max_targ = 8;
309
310	for (i = 0; i < max_targ; i++) {
311
312		ahd_dump_target_state(ahd, m, ahd->our_id, 'A',
313				      /*target_id*/i);
314	}
315	return 0;
316}
317