aic7xxx_proc.c
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上传日期:2013-02-24
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- /*
- * Copyright (c) 2000-2001 Adaptec Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions, and the following disclaimer,
- * without modification.
- * 2. Redistributions in binary form must reproduce at minimum a disclaimer
- * substantially similar to the "NO WARRANTY" disclaimer below
- * ("Disclaimer") and any redistribution must be conditioned upon
- * including a substantially similar Disclaimer requirement for further
- * binary redistribution.
- * 3. Neither the names of the above-listed copyright holders nor the names
- * of any contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * Alternatively, this software may be distributed under the terms of the
- * GNU General Public License ("GPL") version 2 as published by the Free
- * Software Foundation.
- *
- * NO WARRANTY
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
- * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGES.
- *
- * String handling code courtesy of Gerard Roudier's <groudier@club-internet.fr>
- * sym driver.
- *
- * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_proc.c#13 $
- */
- #include "aic7xxx_osm.h"
- #include "aic7xxx_inline.h"
- static void copy_mem_info(struct info_str *info, char *data, int len);
- static int copy_info(struct info_str *info, char *fmt, ...);
- static u_int scsi_calc_syncsrate(u_int period_factor);
- static void ahc_dump_target_state(struct ahc_softc *ahc,
- struct info_str *info,
- u_int our_id, char channel,
- u_int target_id, u_int target_offset);
- static void ahc_dump_device_state(struct info_str *info,
- struct ahc_linux_device *dev);
- static void
- copy_mem_info(struct info_str *info, char *data, int len)
- {
- if (info->pos + len > info->offset + info->length)
- len = info->offset + info->length - info->pos;
- if (info->pos + len < info->offset) {
- info->pos += len;
- return;
- }
- if (info->pos < info->offset) {
- off_t partial;
- partial = info->offset - info->pos;
- data += partial;
- info->pos += partial;
- len -= partial;
- }
- if (len > 0) {
- memcpy(info->buffer, data, len);
- info->pos += len;
- info->buffer += len;
- }
- }
- static int
- copy_info(struct info_str *info, char *fmt, ...)
- {
- va_list args;
- char buf[256];
- int len;
- va_start(args, fmt);
- len = vsprintf(buf, fmt, args);
- va_end(args);
- copy_mem_info(info, buf, len);
- return (len);
- }
- /*
- * Table of syncrates that don't follow the "divisible by 4"
- * rule. This table will be expanded in future SCSI specs.
- */
- static struct {
- u_int period_factor;
- u_int period; /* in 10ths of ns */
- } scsi_syncrates[] = {
- { 0x09, 125 }, /* FAST-80 */
- { 0x0a, 250 }, /* FAST-40 40MHz */
- { 0x0b, 303 }, /* FAST-40 33MHz */
- { 0x0c, 500 } /* FAST-20 */
- };
-
- /*
- * Return the frequency in kHz corresponding to the given
- * sync period factor.
- */
- static u_int
- scsi_calc_syncsrate(u_int period_factor)
- {
- int i;
- int num_syncrates;
-
- num_syncrates = sizeof(scsi_syncrates) / sizeof(scsi_syncrates[0]);
- /* See if the period is in the "exception" table */
- for (i = 0; i < num_syncrates; i++) {
- if (period_factor == scsi_syncrates[i].period_factor) {
- /* Period in kHz */
- return (10000000 / scsi_syncrates[i].period);
- }
- }
- /*
- * Wasn't in the table, so use the standard
- * 4 times conversion.
- */
- return (10000000 / (period_factor * 4 * 10));
- }
- void
- ahc_format_transinfo(struct info_str *info, struct ahc_transinfo *tinfo)
- {
- u_int speed;
- u_int freq;
- u_int mb;
- speed = 3300;
- freq = 0;
- if (tinfo->offset != 0) {
- freq = scsi_calc_syncsrate(tinfo->period);
- speed = freq;
- }
- speed *= (0x01 << tinfo->width);
- mb = speed / 1000;
- if (mb > 0)
- copy_info(info, "%d.%03dMB/s transfers", mb, speed % 1000);
- else
- copy_info(info, "%dKB/s transfers", speed);
- if (freq != 0) {
- copy_info(info, " (%d.%03dMHz%s, offset %d",
- freq / 1000, freq % 1000,
- (tinfo->ppr_options & MSG_EXT_PPR_DT_REQ) != 0
- ? " DT" : "", tinfo->offset);
- }
- if (tinfo->width > 0) {
- if (freq != 0) {
- copy_info(info, ", ");
- } else {
- copy_info(info, " (");
- }
- copy_info(info, "%dbit)", 8 * (0x01 << tinfo->width));
- } else if (freq != 0) {
- copy_info(info, ")");
- }
- copy_info(info, "n");
- }
- static void
- ahc_dump_target_state(struct ahc_softc *ahc, struct info_str *info,
- u_int our_id, char channel, u_int target_id,
- u_int target_offset)
- {
- struct ahc_linux_target *targ;
- struct ahc_initiator_tinfo *tinfo;
- struct ahc_tmode_tstate *tstate;
- int lun;
- tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
- target_id, &tstate);
- copy_info(info, "Channel %c Target %d Negotiation Settingsn",
- channel, target_id);
- copy_info(info, "tUser: ");
- ahc_format_transinfo(info, &tinfo->user);
- targ = ahc->platform_data->targets[target_offset];
- if (targ == NULL)
- return;
- copy_info(info, "tGoal: ");
- ahc_format_transinfo(info, &tinfo->goal);
- copy_info(info, "tCurr: ");
- ahc_format_transinfo(info, &tinfo->curr);
- for (lun = 0; lun < AHC_NUM_LUNS; lun++) {
- struct ahc_linux_device *dev;
- dev = targ->devices[lun];
- if (dev == NULL)
- continue;
- ahc_dump_device_state(info, dev);
- }
- }
- static void
- ahc_dump_device_state(struct info_str *info, struct ahc_linux_device *dev)
- {
- copy_info(info, "tChannel %c Target %d Lun %d Settingsn",
- dev->target->channel + 'A', dev->target->target, dev->lun);
- copy_info(info, "ttCommands Queued %ldn", dev->commands_issued);
- copy_info(info, "ttCommands Active %dn", dev->active);
- copy_info(info, "ttCommand Openings %dn", dev->openings);
- copy_info(info, "ttMax Tagged Openings %dn", dev->maxtags);
- copy_info(info, "ttDevice Queue Frozen Count %dn", dev->qfrozen);
- }
- /*
- * Return information to handle /proc support for the driver.
- */
- int
- ahc_linux_proc_info(char *buffer, char **start, off_t offset,
- int length, int hostno, int inout)
- {
- struct ahc_softc *ahc;
- struct info_str info;
- char ahc_info[256];
- u_int max_targ;
- u_int i;
- TAILQ_FOREACH(ahc, &ahc_tailq, links) {
- if (ahc->platform_data->host->host_no == hostno)
- break;
- }
- if (ahc == NULL)
- return (-EINVAL);
- /* Has data been written to the file? */
- if (inout == TRUE)
- return (-ENOSYS);
- if (start)
- *start = buffer;
- info.buffer = buffer;
- info.length = length;
- info.offset = offset;
- info.pos = 0;
- copy_info(&info, "Adaptec AIC7xxx driver version: %sn",
- AIC7XXX_DRIVER_VERSION);
- ahc_controller_info(ahc, ahc_info);
- copy_info(&info, "%sn", ahc_info);
- max_targ = 15;
- if ((ahc->features & (AHC_WIDE|AHC_TWIN)) == 0)
- max_targ = 7;
- for (i = 0; i <= max_targ; i++) {
- u_int our_id;
- u_int target_id;
- char channel;
- channel = 'A';
- our_id = ahc->our_id;
- target_id = i;
- if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
- channel = 'B';
- our_id = ahc->our_id_b;
- target_id = i % 8;
- }
- ahc_dump_target_state(ahc, &info, our_id,
- channel, target_id, i);
- }
- return (info.pos > info.offset ? info.pos - info.offset : 0);
- }