patch-2.1.73 linux/drivers/block/ide-proc.c

• Lines: 506
• Date: Wed Dec 17 11:11:51 1997
• Orig file: v2.1.72/linux/drivers/block/ide-proc.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.72/linux/drivers/block/ide-proc.c linux/drivers/block/ide-proc.c
@@ -0,0 +1,505 @@
+/*
+ *  linux/drivers/block/proc_ide.c	Version 1.01	December 12, 1997
+ *
+ *  Copyright (C) 1997-1998	Mark Lord
+ */
+
+/*
+ * This is the /proc/ide/ filesystem implementation.
+ *
+ * The major reason this exists is to provide sufficient access
+ * to driver and config data, such that user-mode programs can
+ * be developed to handle chipset tuning for most PCI interfaces.
+ * This should provide better utilities, and less kernel bloat.
+ *
+ * The entire pci config space for a PCI interface chipset can be
+ * retrieved by just reading it.  e.g.    "cat /proc/ide3/pci"
+ *
+ * To modify registers, do something like:
+ *   echo "40:88" >/proc/ide/ide3/pci
+ * That expression writes 0x88 to pci config register 0x40
+ * on the chip which controls ide3.  Multiple tuples can be issued,
+ * and the writes will be completed as an atomic set:
+ *   echo "40:88 41:35 42:00 43:00" >/proc/ide/ide3/pci
+ * All numbers must be pairs of ascii hex digits.
+ *
+ * Also useful, "cat /proc/ide0/hda/identify" will issue an IDENTIFY
+ * (or PACKET_IDENTIFY) command to /dev/hda, and then dump out the
+ * returned data as 256 16-bit words.  The "hdparm" utility will
+ * be updated someday soon to use this mechanism.
+ *
+ * Feel free to develop and distribute fancy GUI configuration
+ * utilities for you favorite PCI chipsets.  I'll be working on
+ * one for the Promise 20246 someday soon.  -ml
+ *
+ */
+
+#include <linux/config.h>
+#include <asm/uaccess.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/proc_fs.h>
+#include <linux/stat.h>
+#include <linux/mm.h>
+#include <linux/pci.h>
+#include <linux/bios32.h>
+#include <linux/ctype.h>
+#include "ide.h"
+
+#ifndef MIN
+#define MIN(a,b) (((a) < (b)) ? (a) : (b))
+#endif
+
+/*
+ * Standard exit stuff:
+ */
+#define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) \
+{					\
+	len -= off;			\
+	if (len < count) {		\
+		*eof = 1;		\
+		if (len <= 0)		\
+			return 0;	\
+	} else				\
+		len = count;		\
+	*start = page + off;		\
+	return len;			\
+}
+
+
+#ifdef CONFIG_PCI
+
+static int ide_getxdigit(char c)
+{
+	int digit;
+	if (isdigit(c))
+		digit = c - '0';
+	else if (isxdigit(c))
+		digit = tolower(c) - 'a' + 10;
+	else
+		digit = -1;
+	return digit;
+}
+
+
+static int xx_xx_parse_error (const char *start, unsigned long maxlen)
+{
+	char errbuf[7];
+	int i, len = MIN(6, maxlen);
+	for (i = 0; i < len; ++i) {
+		char c = start[i];
+		if (!c || c == '\n')
+			c = '\0';
+		else if (iscntrl(c))
+			c = '?';
+		errbuf[i] = c;
+	}
+	errbuf[i] = '\0';
+	printk("proc_ide: error: expected 'xx:xx', but got '%s'\n", errbuf);
+	return -EINVAL;
+}
+
+static int proc_ide_write_pci
+	(struct file *file, const char *buffer, unsigned long count, void *data)
+{
+	ide_hwif_t	*hwif = (ide_hwif_t *)data;
+	int		for_real = 0;
+	unsigned long	n, flags;
+	const char	*start;
+
+	if (!suser())
+		return -EACCES;
+	/*
+	 * Skip over leading whitespace
+	 */
+	while (count && isspace(*buffer)) {
+		--count;
+		++buffer;
+	}
+	/*
+	 * Do one full pass to verify all parameters,
+	 * then do another to actually write the pci regs.
+	 */
+	save_flags(flags);
+	do {
+		const char *p = buffer;
+		n = count;
+		if (for_real) {
+			unsigned long timeout = jiffies + (3 * HZ);
+			cli();	/* ensure all PCI writes are done together */
+			while (((ide_hwgroup_t *)(hwif->hwgroup))->active || (hwif->mate && ((ide_hwgroup_t *)(hwif->mate->hwgroup))->active)) {
+				sti();
+				if (0 < (signed long)(timeout - jiffies)) {
+					printk("/proc/ide/%s/pci: channel(s) busy, cannot write\n", hwif->name);
+					return -EBUSY;
+				}
+				cli();
+			}
+		}
+		while (n) {
+			int d1, d2, rc;
+			byte reg, val;
+			start = p;
+#if 0
+			printk("loop(%d): n=%ld, input=%.5s\n", for_real, n, p);
+#endif
+			if (n < 5)
+				goto parse_error;
+			if (0 > (d1 = ide_getxdigit(*p++)) || 0 > (d2 = ide_getxdigit(*p++)))
+				goto parse_error;
+			reg = (d1 << 4) | d2;
+			if (*p++ != ':')
+				goto parse_error;
+			if (0 > (d1 = ide_getxdigit(*p++)) || 0 > (d2 = ide_getxdigit(*p++)))
+				goto parse_error;
+			val = (d1 << 4) | d2;
+			if (n > 5 && !isspace(*p))
+				goto parse_error;
+			n -= 5;
+			while (n && isspace(*p)) {
+				--n;
+				++p;
+			}
+			if (for_real) {
+#if 0
+				printk("proc_ide_write_pci: reg=0x%02x, val=0x%02x\n", reg, val);
+#endif
+				rc = pcibios_write_config_byte(hwif->pci_bus, hwif->pci_fn, reg, val);
+				if (rc) {
+					restore_flags(flags);
+					printk("proc_ide_write_pci: error writing bus %d fn %d reg 0x%02x value 0x%02x\n",
+						hwif->pci_bus, hwif->pci_fn, reg, val);
+					printk("proc_ide_write_pci: %s\n", pcibios_strerror(rc));
+					return -EIO;
+				}
+			}
+		}
+	} while (!for_real++);
+	restore_flags(flags);
+	return count;
+parse_error:
+	restore_flags(flags);
+	return xx_xx_parse_error(start, n);
+}
+
+static int proc_ide_read_pci
+	(char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+	ide_hwif_t	*hwif = (ide_hwif_t *)data;
+	char		*out = page;
+	int		len, reg = 0;
+
+	out += sprintf(out, "Bus %d Function %d Vendor %04x Device %04x Channel %d\n",
+		hwif->pci_bus, hwif->pci_fn, hwif->pci_devid.vid, hwif->pci_devid.did, hwif->channel);
+	do {
+		byte val;
+		int rc = pcibios_read_config_byte(hwif->pci_bus, hwif->pci_fn, reg, &val);
+		if (rc) {
+			printk("proc_ide_read_pci: error reading bus %d fn %d reg 0x%02x\n",
+				hwif->pci_bus, hwif->pci_fn, reg);
+			printk("proc_ide_read_pci: %s\n", pcibios_strerror(rc));
+			return -EIO;
+			out += sprintf(out, "??%c", (++reg & 0xf) ? ' ' : '\n');
+		} else
+			out += sprintf(out, "%02x%c", val, (++reg & 0xf) ? ' ' : '\n');
+	} while (reg < 0x100);
+	len = out - page;
+	PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
+}
+
+static int proc_ide_read_imodel
+	(char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+	ide_hwif_t	*hwif = (ide_hwif_t *) data;
+	int		len;
+	const char	*vids, *dids;
+
+	vids = pci_strvendor(hwif->pci_devid.vid);
+	dids = pci_strdev(hwif->pci_devid.vid, hwif->pci_devid.did);
+	len = sprintf(page,"%s: %s\n", vids ? vids : "(none)", dids ? dids : "(none)");
+	PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
+}
+#endif	/* CONFIG_PCI */
+
+static int proc_ide_read_type
+	(char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+	ide_hwif_t	*hwif = (ide_hwif_t *) data;
+	int		len;
+	const char	*name;
+
+	switch (hwif->chipset) {
+		case ide_unknown:	name = "(none)";	break;
+		case ide_generic:	name = "generic";	break;
+		case ide_pci:		name = "pci";		break;
+		case ide_cmd640:	name = "cmd640";	break;
+		case ide_dtc2278:	name = "dtc2278";	break;
+		case ide_ali14xx:	name = "ali14xx";	break;
+		case ide_qd6580:	name = "qd6580";	break;
+		case ide_umc8672:	name = "umc8672";	break;
+		case ide_ht6560b:	name = "ht6560b";	break;
+		case ide_pdc4030:	name = "pdc4030";	break;
+		case ide_rz1000:	name = "rz1000";	break;
+		case ide_trm290:	name = "trm290";	break;
+		case ide_4drives:	name = "4drives";	break;
+		default:		name = "(unknown)";	break;
+	}
+	len = sprintf(page, "%s\n", name);
+	PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
+}
+
+static int proc_ide_read_mate
+	(char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+	ide_hwif_t	*hwif = (ide_hwif_t *) data;
+	int		len;
+
+	len = sprintf(page, "%s\n", hwif->mate->name);
+	PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
+}
+
+static int proc_ide_read_channel
+	(char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+	ide_hwif_t	*hwif = (ide_hwif_t *) data;
+	int		len;
+
+	page[0] = hwif->channel ? '1' : '0';
+	page[1] = '\n';
+	len = 2;
+	PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
+}
+
+static int proc_ide_get_identify (ide_drive_t *drive, byte *buf)
+{
+	struct request rq;
+	byte *end;
+
+	ide_init_drive_cmd(&rq);
+	rq.buffer = buf;
+	*buf++ = (drive->media == ide_disk) ? WIN_IDENTIFY : WIN_PIDENTIFY;
+	*buf++ = 0;
+	*buf++ = 0;
+	*buf++ = 1;
+	end = buf + (SECTOR_WORDS * 4);
+	while (buf != end)
+		*buf++ = 0;	/* pre-zero it, in case identify fails */
+	(void) ide_do_drive_cmd(drive, &rq, ide_wait);
+	return 0;
+}
+
+static int proc_ide_read_identify
+	(char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+	ide_drive_t	*drive = (ide_drive_t *)data;
+	int		len = 0, i = 0;
+
+	if (!proc_ide_get_identify(drive, page)) {
+		unsigned short *val = ((unsigned short *)page) + 2;
+		char *out = ((char *)val) + (SECTOR_WORDS * 4);
+		page = out;
+		do {
+			out += sprintf(out, "%04x%c", le16_to_cpu(*val), (++i & 7) ? ' ' : '\n');
+			val += 1;
+		} while (i < (SECTOR_WORDS * 2));
+		len = out - page;
+	}
+	PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
+}
+
+static int proc_ide_read_settings
+	(char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+	ide_drive_t	*drive = (ide_drive_t *) data;
+	char		*out = page;
+	int		len;
+
+	out += sprintf(out,"multcount    %i\n", drive->mult_count);
+	out += sprintf(out,"io_32bit     %i\n", drive->io_32bit);
+	out += sprintf(out,"unmaskirq    %i\n", drive->unmask);
+	out += sprintf(out,"using_dma    %i\n", drive->using_dma);
+	out += sprintf(out,"nowerr       %i\n", drive->bad_wstat == BAD_R_STAT);
+	out += sprintf(out,"keepsettings %i\n", drive->keep_settings);
+	out += sprintf(out,"nice         %i/%i/%i\n", drive->nice0, drive->nice1, drive->nice2);
+	len = out - page;
+	PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
+}
+
+int proc_ide_read_capacity
+	(char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+	ide_drive_t	*drive = (ide_drive_t *) data;
+	int		len;
+
+	len = sprintf(page,"%li\n", ((ide_driver_t *)drive->driver)->capacity(drive));
+	PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
+}
+
+int proc_ide_read_geometry
+	(char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+	ide_drive_t	*drive = (ide_drive_t *) data;
+	char		*out = page;
+	int		len;
+
+	out += sprintf(out,"physical     %hi/%hi/%hi\n", drive->cyl, drive->head, drive->sect);
+	out += sprintf(out,"logical      %hi/%hi/%hi\n", drive->bios_cyl, drive->bios_head, drive->bios_sect);
+	len = out - page;
+	PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
+}
+
+static int proc_ide_read_dmodel
+	(char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+	ide_drive_t	*drive = (ide_drive_t *) data;
+	struct hd_driveid *id = drive->id;
+	int		len;
+
+	len = sprintf(page, "%.40s\n", (id && id->model[0]) ? (char *)id->model : "(none)");
+	PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
+}
+
+static int proc_ide_read_driver
+	(char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+	ide_drive_t	*drive = (ide_drive_t *) data;
+	ide_driver_t	*driver = (ide_driver_t *) drive->driver;
+	int		len;
+
+	if (!driver)
+		len = sprintf(page, "(none)\n");
+	else
+		len = sprintf(page, "%s version %s\n", driver->name, driver->version);
+	PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
+}
+
+static int proc_ide_read_media
+	(char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+	ide_drive_t	*drive = (ide_drive_t *) data;
+	const char	*media;
+	int		len;
+
+	switch (drive->media) {
+		case ide_disk:	media = "disk\n";
+				break;
+		case ide_cdrom:	media = "cdrom\n";
+				break;
+		case ide_tape:	media = "tape\n";
+				break;
+		case ide_floppy:media = "floppy\n";
+				break;
+		default:	media = "UNKNOWN\n";
+				break;
+	}
+	strcpy(page,media);
+	len = strlen(media);
+	PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
+}
+
+
+static ide_proc_entry_t generic_drive_entries[] = {
+	{ "capacity", proc_ide_read_capacity, NULL },
+	{ "driver", proc_ide_read_driver, NULL },
+	{ "identify", proc_ide_read_identify, NULL },
+	{ "media", proc_ide_read_media, NULL },
+	{ "model", proc_ide_read_dmodel, NULL },
+	{ "settings", proc_ide_read_settings, NULL },
+	{ NULL, NULL, NULL }
+};
+
+void ide_add_proc_entries(ide_drive_t *drive, ide_proc_entry_t *p)
+{
+	struct proc_dir_entry *ent;
+
+	if (!drive->proc || !p)
+		return;
+	while (p->name != NULL) {
+		ent = create_proc_entry(p->name, 0, drive->proc);
+		if (!ent) return;
+		ent->data = drive;
+		ent->read_proc = p->read_proc;
+		ent->write_proc = p->write_proc;
+		p++;
+	}
+}
+
+void ide_remove_proc_entries(ide_drive_t *drive, ide_proc_entry_t *p)
+{
+	if (!drive->proc || !p)
+		return;
+	while (p->name != NULL) {
+		remove_proc_entry(p->name, drive->proc);
+		p++;
+	}
+}
+
+static void create_proc_ide_drives (ide_hwif_t *hwif, struct proc_dir_entry *parent)
+{
+	int	d;
+
+	for (d = 0; d < MAX_DRIVES; d++) {
+		ide_drive_t *drive = &hwif->drives[d];
+
+		if (!drive->present)
+			continue;
+		drive->proc = create_proc_entry(drive->name, S_IFDIR, parent);
+		if (drive->proc)
+			ide_add_proc_entries(drive, generic_drive_entries);
+	}
+}
+
+static void create_proc_ide_interfaces (struct proc_dir_entry *parent)
+{
+	int	h;
+	struct proc_dir_entry *hwif_ent, *ent;
+
+	for (h = 0; h < MAX_HWIFS; h++) {
+		ide_hwif_t *hwif = &ide_hwifs[h];
+
+		if (!hwif->present)
+			continue;
+		hwif_ent = create_proc_entry(hwif->name, S_IFDIR, parent);
+		if (!hwif_ent) return;
+#ifdef CONFIG_PCI
+		if (!IDE_PCI_DEVID_EQ(hwif->pci_devid, IDE_PCI_DEVID_NULL)) {
+			ent = create_proc_entry("pci", 0, hwif_ent);
+			if (!ent) return;
+			ent->data = hwif;
+			ent->read_proc  = proc_ide_read_pci;
+			ent->write_proc = proc_ide_write_pci;;
+
+			ent = create_proc_entry("model", 0, hwif_ent);
+			if (!ent) return;
+			ent->data = hwif;
+			ent->read_proc  = proc_ide_read_imodel;
+		}
+#endif	/* CONFIG_PCI */
+		ent = create_proc_entry("channel", 0, hwif_ent);
+		if (!ent) return;
+		ent->data = hwif;
+		ent->read_proc  = proc_ide_read_channel;
+
+		if (hwif->mate && hwif->mate->present) {
+			ent = create_proc_entry("mate", 0, hwif_ent);
+			if (!ent) return;
+			ent->data = hwif;
+			ent->read_proc  = proc_ide_read_mate;
+		}
+
+		ent = create_proc_entry("type", 0, hwif_ent);
+		if (!ent) return;
+		ent->data = hwif;
+		ent->read_proc  = proc_ide_read_type;
+
+		create_proc_ide_drives(hwif, hwif_ent);
+	}
+}
+
+void proc_ide_init(void)
+{
+	struct proc_dir_entry *ent;
+	ent = create_proc_entry("ide", S_IFDIR, 0);
+	if (!ent) return;
+	create_proc_ide_interfaces(ent);
+}