patch-2.4.3 linux/drivers/scsi/aic7xxx/aic7xxx_proc.c

• Lines: 281
• Date: Sun Mar 4 14:30:18 2001
• Orig file: v2.4.2/linux/drivers/scsi/aic7xxx/aic7xxx_proc.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.2/linux/drivers/scsi/aic7xxx/aic7xxx_proc.c linux/drivers/scsi/aic7xxx/aic7xxx_proc.c
@@ -0,0 +1,280 @@
+/*
+ * 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. The name of the author may not 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 Public License ("GPL").
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, 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 DAMAGE.
+ *
+ * String handling code courtesy of Gerard Roudier's <groudier@club-internet.fr>
+ * sym driver.
+ *
+ * $Id: //depot/src/linux/drivers/scsi/aic7xxx/aic7xxx_proc.c#7 $
+ */
+#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	tmode_tstate *tstate;
+	int	lun;
+
+	tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
+				    target_id, &tstate);
+	copy_info(info, "Channel %c Target %d Negotiation Settings\n",
+		  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->current);
+
+	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 Settings\n",
+		  dev->target->channel + 'A', dev->target->target, dev->lun);
+
+	copy_info(info, "\t\tCommands Queued %d\n", dev->num_commands);
+	copy_info(info, "\t\tCommands Active %d\n", dev->active);
+	copy_info(info, "\t\tCommand Openings %d\n", dev->openings);
+	copy_info(info, "\t\tMax Tagged Openings %d\n", dev->maxtags);
+	copy_info(info, "\t\tDevice Queue Frozen Count %d\n", dev->qfrozen);
+}
+
+/*
+ * Return information to handle /proc support for the driver.
+ */
+int
+aic7xxx_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: %s\n",
+		  AIC7XXX_DRIVER_VERSION);
+	ahc_controller_info(ahc, ahc_info);
+	copy_info(&info, "%s\n", 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);
+}