patch-2.3.99-pre1 linux/drivers/ide/ide-proc.c

• Lines: 905
• Date: Thu Mar 9 17:39:10 2000
• Orig file: v2.3.51/linux/drivers/ide/ide-proc.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.51/linux/drivers/ide/ide-proc.c linux/drivers/ide/ide-proc.c
@@ -0,0 +1,904 @@
+/*
+ *  linux/drivers/block/ide-proc.c	Version 1.03	January  2, 1998
+ *
+ *  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/config"
+ *
+ * To modify registers *safely*, do something like:
+ *   echo "P40:88" >/proc/ide/ide3/config
+ * 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 "P40:88 P41:35 P42:00 P43:00" >/proc/ide/ide3/config
+ *
+ * All numbers must be specified using pairs of ascii hex digits.
+ * It is important to note that these writes will be performed
+ * after waiting for the IDE controller (both interfaces)
+ * to be completely idle, to ensure no corruption of I/O in progress.
+ *
+ * Non-PCI registers can also be written, using "R" in place of "P"
+ * in the above examples.  The size of the port transfer is determined
+ * by the number of pairs of hex digits given for the data.  If a two
+ * digit value is given, the write will be a byte operation; if four
+ * digits are used, the write will be performed as a 16-bit operation;
+ * and if eight digits are specified, a 32-bit "dword" write will be
+ * performed.  Odd numbers of digits are not permitted.
+ *
+ * If there is an error *anywhere* in the string of registers/data
+ * then *none* of the writes will be performed.
+ *
+ * Drive/Driver settings can be retrieved by reading the drive's
+ * "settings" files.  e.g.    "cat /proc/ide0/hda/settings"
+ * To write a new value "val" into a specific setting "name", use:
+ *   echo "name:val" >/proc/ide/ide0/hda/settings
+ *
+ * Also useful, "cat /proc/ide0/hda/[identify, smart_values,
+ * smart_thresholds, capabilities]" will issue an IDENTIFY /
+ * PACKET_IDENTIFY / SMART_READ_VALUES / SMART_READ_THRESHOLDS /
+ * SENSE CAPABILITIES 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 your 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/ctype.h>
+#include <linux/ide.h>
+
+#include <asm/io.h>
+
+#ifndef MIN
+#define MIN(a,b) (((a) < (b)) ? (a) : (b))
+#endif
+
+#ifdef CONFIG_BLK_DEV_AEC6210
+extern byte aec6210_proc;
+int (*aec6210_display_info)(char *, char **, off_t, int) = NULL;
+#endif /* CONFIG_BLK_DEV_AEC6210 */
+#ifdef CONFIG_BLK_DEV_ALI15X3
+extern byte ali_proc;
+int (*ali_display_info)(char *, char **, off_t, int) = NULL;
+#endif /* CONFIG_BLK_DEV_ALI15X3 */
+#ifdef CONFIG_BLK_DEV_AMD7409
+extern byte amd7409_proc;
+int (*amd7409_display_info)(char *, char **, off_t, int) = NULL;
+#endif /* CONFIG_BLK_DEV_AMD7409 */
+#ifdef CONFIG_BLK_DEV_CMD64X
+extern byte cmd64x_proc;
+int (*cmd64x_display_info)(char *, char **, off_t, int) = NULL;
+#endif /* CONFIG_BLK_DEV_CMD64X */
+#ifdef CONFIG_BLK_DEV_CS5530
+extern byte cs5530_proc;
+int (*cs5530_display_info)(char *, char **, off_t, int) = NULL;
+#endif /* CONFIG_BLK_DEV_CS5530 */
+#ifdef CONFIG_BLK_DEV_HPT34X
+extern byte hpt34x_proc;
+int (*hpt34x_display_info)(char *, char **, off_t, int) = NULL;
+#endif /* CONFIG_BLK_DEV_HPT34X */
+#ifdef CONFIG_BLK_DEV_HPT366
+extern byte hpt366_proc;
+int (*hpt366_display_info)(char *, char **, off_t, int) = NULL;
+#endif /* CONFIG_BLK_DEV_HPT366 */
+#ifdef CONFIG_BLK_DEV_PDC202XX
+extern byte pdc202xx_proc;
+int (*pdc202xx_display_info)(char *, char **, off_t, int) = NULL;
+#endif /* CONFIG_BLK_DEV_PDC202XX */
+#ifdef CONFIG_BLK_DEV_PIIX
+extern byte piix_proc;
+int (*piix_display_info)(char *, char **, off_t, int) = NULL;
+#endif /* CONFIG_BLK_DEV_PIIX */
+#ifdef CONFIG_BLK_DEV_SIS5513
+extern byte sis_proc;
+int (*sis_display_info)(char *, char **, off_t, int) = NULL;
+#endif /* CONFIG_BLK_DEV_SIS5513 */
+#ifdef CONFIG_BLK_DEV_VIA82CXXX
+extern byte via_proc;
+int (*via_display_info)(char *, char **, off_t, int) = NULL;
+#endif /* CONFIG_BLK_DEV_VIA82CXXX */
+
+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 *data, unsigned long len, const char *msg)
+{
+	char errbuf[16];
+	int i;
+	if (len >= sizeof(errbuf))
+		len = sizeof(errbuf) - 1;
+	for (i = 0; i < len; ++i) {
+		char c = data[i];
+		if (!c || c == '\n')
+			c = '\0';
+		else if (iscntrl(c))
+			c = '?';
+		errbuf[i] = c;
+	}
+	errbuf[i] = '\0';
+	printk("proc_ide: error: %s: '%s'\n", msg, errbuf);
+	return -EINVAL;
+}
+
+static struct proc_dir_entry * proc_ide_root = NULL;
+
+static int proc_ide_write_config
+	(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	startn = 0, n, flags;
+	const char	*start = NULL, *msg = NULL;
+
+	if (!capable(CAP_SYS_ADMIN))
+		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 regs.
+	 */
+	save_flags(flags);	/* all CPUs */
+	do {
+		const char *p;
+		if (for_real) {
+			unsigned long timeout = jiffies + (3 * HZ);
+			ide_hwgroup_t *mygroup = (ide_hwgroup_t *)(hwif->hwgroup);
+			ide_hwgroup_t *mategroup = NULL;
+			if (hwif->mate && hwif->mate->hwgroup)
+				mategroup = (ide_hwgroup_t *)(hwif->mate->hwgroup);
+			cli();	/* all CPUs; ensure all writes are done together */
+			while (mygroup->busy || (mategroup && mategroup->busy)) {
+				sti();	/* all CPUs */
+				if (0 < (signed long)(jiffies - timeout)) {
+					printk("/proc/ide/%s/config: channel(s) busy, cannot write\n", hwif->name);
+					restore_flags(flags);	/* all CPUs */
+					return -EBUSY;
+				}
+				cli();	/* all CPUs */
+			}
+		}
+		p = buffer;
+		n = count;
+		while (n > 0) {
+			int d, digits;
+			unsigned int reg = 0, val = 0, is_pci;
+			start = p;
+			startn = n--;
+			switch (*p++) {
+				case 'R':	is_pci = 0;
+						break;
+				case 'P':	is_pci = 1;
+#ifdef CONFIG_BLK_DEV_IDEPCI
+						if (hwif->pci_dev && !IDE_PCI_DEVID_EQ(hwif->pci_devid, IDE_PCI_DEVID_NULL))
+							break;
+#endif	/* CONFIG_BLK_DEV_IDEPCI */
+						msg = "not a PCI device";
+						goto parse_error;
+				default:	msg = "expected 'R' or 'P'";
+						goto parse_error;
+			}
+			digits = 0;
+			while (n > 0 && (d = ide_getxdigit(*p)) >= 0) {
+				reg = (reg << 4) | d;
+				--n;
+				++p;
+				++digits;
+			}
+			if (!digits || (digits > 4) || (is_pci && reg > 0xff)) {
+				msg = "bad/missing register number";
+				goto parse_error;
+			}
+			if (n-- == 0 || *p++ != ':') {
+				msg = "missing ':'";
+				goto parse_error;
+			}
+			digits = 0;
+			while (n > 0 && (d = ide_getxdigit(*p)) >= 0) {
+				val = (val << 4) | d;
+				--n;
+				++p;
+				++digits;
+			}
+			if (digits != 2 && digits != 4 && digits != 8) {
+				msg = "bad data, 2/4/8 digits required";
+				goto parse_error;
+			}
+			if (n > 0 && !isspace(*p)) {
+				msg = "expected whitespace after data";
+				goto parse_error;
+			}
+			while (n > 0 && isspace(*p)) {
+				--n;
+				++p;
+			}
+#ifdef CONFIG_BLK_DEV_IDEPCI
+			if (is_pci && (reg & ((digits >> 1) - 1))) {
+				msg = "misaligned access";
+				goto parse_error;
+			}
+#endif	/* CONFIG_BLK_DEV_IDEPCI */
+			if (for_real) {
+#if 0
+				printk("proc_ide_write_config: type=%c, reg=0x%x, val=0x%x, digits=%d\n", is_pci ? "PCI" : "non-PCI", reg, val, digits);
+#endif
+				if (is_pci) {
+#ifdef CONFIG_BLK_DEV_IDEPCI
+					int rc = 0;
+					struct pci_dev *dev = hwif->pci_dev;
+					switch (digits) {
+						case 2:	msg = "byte";
+							rc = pci_write_config_byte(dev, reg, val);
+							break;
+						case 4:	msg = "word";
+							rc = pci_write_config_word(dev, reg, val);
+							break;
+						case 8:	msg = "dword";
+							rc = pci_write_config_dword(dev, reg, val);
+							break;
+					}
+					if (rc) {
+						restore_flags(flags);	/* all CPUs */
+						printk("proc_ide_write_config: error writing %s at bus %02x dev %02x reg 0x%x value 0x%x\n",
+							msg, dev->bus->number, dev->devfn, reg, val);
+						printk("proc_ide_write_config: error %d\n", rc);
+						return -EIO;
+					}
+#endif	/* CONFIG_BLK_DEV_IDEPCI */
+				} else {	/* not pci */
+#if !defined(__mc68000__) && !defined(CONFIG_APUS)
+
+/*
+ * Geert Uytterhoeven
+ *
+ * unless you can explain me what it really does.
+ * On m68k, we don't have outw() and outl() yet,
+ * and I need a good reason to implement it.
+ * 
+ * BTW, IMHO the main remaining portability problem with the IDE driver 
+ * is that it mixes IO (ioport) and MMIO (iomem) access on different platforms.
+ * 
+ * I think all accesses should be done using
+ * 
+ *     ide_in[bwl](ide_device_instance, offset)
+ *     ide_out[bwl](ide_device_instance, value, offset)
+ * 
+ * so the architecture specific code can #define ide_{in,out}[bwl] to the
+ * appropriate function.
+ * 
+ */
+					switch (digits) {
+						case 2:	outb(val, reg);
+							break;
+						case 4:	outw(val, reg);
+							break;
+						case 8:	outl(val, reg);
+							break;
+					}
+#endif /* !__mc68000__ && !CONFIG_APUS */
+				}
+			}
+		}
+	} while (!for_real++);
+	restore_flags(flags);	/* all CPUs */
+	return count;
+parse_error:
+	restore_flags(flags);	/* all CPUs */
+	printk("parse error\n");
+	return xx_xx_parse_error(start, startn, msg);
+}
+
+static int proc_ide_read_config
+	(char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+	char		*out = page;
+	int		len;
+
+#ifdef CONFIG_BLK_DEV_IDEPCI
+	ide_hwif_t	*hwif = (ide_hwif_t *)data;
+	struct pci_dev	*dev = hwif->pci_dev;
+	if (!IDE_PCI_DEVID_EQ(hwif->pci_devid, IDE_PCI_DEVID_NULL) && dev && dev->bus) {
+		int reg = 0;
+
+		out += sprintf(out, "pci bus %02x device %02x vid %04x did %04x channel %d\n",
+			dev->bus->number, dev->devfn, hwif->pci_devid.vid, hwif->pci_devid.did, hwif->channel);
+		do {
+			byte val;
+			int rc = pci_read_config_byte(dev, reg, &val);
+			if (rc) {
+				printk("proc_ide_read_config: error %d reading bus %02x dev %02x reg 0x%02x\n",
+					rc, dev->bus->number, dev->devfn, reg);
+				out += sprintf(out, "??%c", (++reg & 0xf) ? ' ' : '\n');
+			} else
+				out += sprintf(out, "%02x%c", val, (++reg & 0xf) ? ' ' : '\n');
+		} while (reg < 0x100);
+	} else
+#endif	/* CONFIG_BLK_DEV_IDEPCI */
+		out += sprintf(out, "(none)\n");
+	len = out - page;
+	PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
+}
+
+
+static int ide_getdigit(char c)
+{
+	int digit;
+	if (isdigit(c))
+		digit = c - '0';
+	else
+		digit = -1;
+	return digit;
+}
+
+static int proc_ide_read_drivers
+	(char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+	char		*out = page;
+	int		len;
+	ide_module_t	*p = ide_modules;
+	ide_driver_t	*driver;
+
+	while (p) {
+		driver = (ide_driver_t *) p->info;
+		if (driver)
+			out += sprintf(out, "%s version %s\n", driver->name, driver->version);
+		p = p->next;
+	}
+	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	*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_cmd646:	name = "cmd646";	break;
+		case ide_cy82c693:	name = "cy82c693";	break;
+		case ide_4drives:	name = "4drives";	break;
+		case ide_pmac:		name = "mac-io";	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;
+
+	if (hwif && hwif->mate && hwif->mate->present)
+		len = sprintf(page, "%s\n", hwif->mate->name);
+	else
+		len = sprintf(page, "(none)\n");
+	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)
+{
+	return ide_wait_cmd(drive, (drive->media == ide_disk) ? WIN_IDENTIFY : WIN_PIDENTIFY, 0, 0, 1, buf);
+}
+
+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 (drive && !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;
+	}
+	else
+		len = sprintf(page, "\n");
+	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;
+	ide_settings_t	*setting = (ide_settings_t *) drive->settings;
+	char		*out = page;
+	int		len, rc, mul_factor, div_factor;
+
+	out += sprintf(out, "name\t\t\tvalue\t\tmin\t\tmax\t\tmode\n");
+	out += sprintf(out, "----\t\t\t-----\t\t---\t\t---\t\t----\n");
+	while(setting) {
+		mul_factor = setting->mul_factor;
+		div_factor = setting->div_factor;
+		out += sprintf(out, "%-24s", setting->name);
+		if ((rc = ide_read_setting(drive, setting)) >= 0)
+			out += sprintf(out, "%-16d", rc * mul_factor / div_factor);
+		else
+			out += sprintf(out, "%-16s", "write-only");
+		out += sprintf(out, "%-16d%-16d", (setting->min * mul_factor + div_factor - 1) / div_factor, setting->max * mul_factor / div_factor);
+		if (setting->rw & SETTING_READ)
+			out += sprintf(out, "r");
+		if (setting->rw & SETTING_WRITE)
+			out += sprintf(out, "w");
+		out += sprintf(out, "\n");
+		setting = setting->next;
+	}
+	len = out - page;
+	PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
+}
+
+#define MAX_LEN	30
+
+static int proc_ide_write_settings
+	(struct file *file, const char *buffer, unsigned long count, void *data)
+{
+	ide_drive_t	*drive = (ide_drive_t *) data;
+	char		name[MAX_LEN + 1];
+	int		for_real = 0, len;
+	unsigned long	n;
+	const char	*start = NULL;
+	ide_settings_t	*setting;
+
+	if (!capable(CAP_SYS_ADMIN))
+		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 new settings.
+	 */
+	do {
+		const char *p;
+		p = buffer;
+		n = count;
+		while (n > 0) {
+			int d, digits;
+			unsigned int val = 0;
+			start = p;
+
+			while (n > 0 && *p != ':') {
+				--n;
+				p++;
+			}
+			if (*p != ':')
+				goto parse_error;
+			len = IDE_MIN(p - start, MAX_LEN);
+			strncpy(name, start, IDE_MIN(len, MAX_LEN));
+			name[len] = 0;
+
+			if (n > 0) {
+				--n;
+				p++;
+			} else
+				goto parse_error;
+			
+			digits = 0;
+			while (n > 0 && (d = ide_getdigit(*p)) >= 0) {
+				val = (val * 10) + d;
+				--n;
+				++p;
+				++digits;
+			}
+			if (n > 0 && !isspace(*p))
+				goto parse_error;
+			while (n > 0 && isspace(*p)) {
+				--n;
+				++p;
+			}
+			setting = ide_find_setting_by_name(drive, name);
+			if (!setting)
+				goto parse_error;
+
+			if (for_real)
+				ide_write_setting(drive, setting, val * setting->div_factor / setting->mul_factor);
+		}
+	} while (!for_real++);
+	return count;
+parse_error:
+	printk("proc_ide_write_settings(): parse error\n");
+	return -EINVAL;
+}
+
+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;
+	ide_driver_t    *driver = (ide_driver_t *) drive->driver;
+	int		len;
+
+	if (!driver)
+		len = sprintf(page, "(none)\n");
+        else
+		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     %d/%d/%d\n", drive->cyl, drive->head, drive->sect);
+	out += sprintf(out,"logical      %d/%d/%d\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_write_driver
+	(struct file *file, const char *buffer, unsigned long count, void *data)
+{
+	ide_drive_t	*drive = (ide_drive_t *) data;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EACCES;
+	if (ide_replace_subdriver(drive, buffer))
+		return -EINVAL;
+	return count;
+}
+
+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[] = {
+	{ "driver",	S_IFREG|S_IRUGO,	proc_ide_read_driver,	proc_ide_write_driver },
+	{ "identify",	S_IFREG|S_IRUSR,	proc_ide_read_identify,	NULL },
+	{ "media",	S_IFREG|S_IRUGO,	proc_ide_read_media,	NULL },
+	{ "model",	S_IFREG|S_IRUGO,	proc_ide_read_dmodel,	NULL },
+	{ "settings",	S_IFREG|S_IRUSR|S_IWUSR,proc_ide_read_settings,	proc_ide_write_settings },
+	{ NULL,	0, NULL, NULL }
+};
+
+void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data)
+{
+	struct proc_dir_entry *ent;
+
+	if (!dir || !p)
+		return;
+	while (p->name != NULL) {
+		ent = create_proc_entry(p->name, p->mode, dir);
+		if (!ent) return;
+		ent->nlink = 1;
+		ent->data = data;
+		ent->read_proc = p->read_proc;
+		ent->write_proc = p->write_proc;
+		p++;
+	}
+}
+
+void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p)
+{
+	if (!dir || !p)
+		return;
+	while (p->name != NULL) {
+		remove_proc_entry(p->name, dir);
+		p++;
+	}
+}
+
+static void create_proc_ide_drives(ide_hwif_t *hwif)
+{
+	int	d;
+	struct proc_dir_entry *ent;
+	struct proc_dir_entry *parent = hwif->proc;
+	char name[64];
+
+	for (d = 0; d < MAX_DRIVES; d++) {
+		ide_drive_t *drive = &hwif->drives[d];
+		ide_driver_t *driver = drive->driver;
+
+		if (!drive->present)
+			continue;
+		if (drive->proc)
+			continue;
+
+		drive->proc = proc_mkdir(drive->name, parent);
+		if (drive->proc) {
+			ide_add_proc_entries(drive->proc, generic_drive_entries, drive);
+			if (driver) {
+				ide_add_proc_entries(drive->proc, generic_subdriver_entries, drive);
+				ide_add_proc_entries(drive->proc, driver->proc, drive);
+			}
+		}
+		sprintf(name,"ide%d/%s", (drive->name[2]-'a')/2, drive->name);
+		ent = proc_symlink(drive->name, proc_ide_root, name);
+		if (!ent) return;
+	}
+}
+
+void destroy_proc_ide_drives(ide_hwif_t *hwif)
+{
+	int	d;
+
+	for (d = 0; d < MAX_DRIVES; d++) {
+		ide_drive_t *drive = &hwif->drives[d];
+		ide_driver_t *driver = drive->driver;
+
+		if (!drive->proc)
+			continue;
+		if (driver)
+			ide_remove_proc_entries(drive->proc, driver->proc);
+		ide_remove_proc_entries(drive->proc, generic_drive_entries);
+		remove_proc_entry(drive->name, proc_ide_root);
+		remove_proc_entry(drive->name, hwif->proc);
+		drive->proc = NULL;
+	}
+}
+
+static ide_proc_entry_t hwif_entries[] = {
+	{ "channel",	S_IFREG|S_IRUGO,	proc_ide_read_channel,	NULL },
+	{ "config",	S_IFREG|S_IRUGO|S_IWUSR,proc_ide_read_config,	proc_ide_write_config },
+	{ "mate",	S_IFREG|S_IRUGO,	proc_ide_read_mate,	NULL },
+	{ "model",	S_IFREG|S_IRUGO,	proc_ide_read_imodel,	NULL },
+	{ NULL,	0, NULL, NULL }
+};
+
+void create_proc_ide_interfaces(void)
+{
+	int	h;
+
+	for (h = 0; h < MAX_HWIFS; h++) {
+		ide_hwif_t *hwif = &ide_hwifs[h];
+
+		if (!hwif->present)
+			continue;
+		if (!hwif->proc) {
+			hwif->proc = proc_mkdir(hwif->name, proc_ide_root);
+			if (!hwif->proc)
+				return;
+			ide_add_proc_entries(hwif->proc, hwif_entries, hwif);
+		}
+		create_proc_ide_drives(hwif);
+	}
+}
+
+static void destroy_proc_ide_interfaces(void)
+{
+	int	h;
+
+	for (h = 0; h < MAX_HWIFS; h++) {
+		ide_hwif_t *hwif = &ide_hwifs[h];
+		int exist = (hwif->proc != NULL);
+#if 0
+		if (!hwif->present)
+			continue;
+#endif
+		if (exist) {
+			destroy_proc_ide_drives(hwif);
+			ide_remove_proc_entries(hwif->proc, hwif_entries);
+			remove_proc_entry(hwif->name, proc_ide_root);
+			hwif->proc = NULL;
+		} else
+			continue;
+	}
+}
+
+void proc_ide_create(void)
+{
+	proc_ide_root = proc_mkdir("ide", 0);
+	if (!proc_ide_root) return;
+
+	create_proc_ide_interfaces();
+
+	create_proc_read_entry("drivers", 0, proc_ide_root,
+				proc_ide_read_drivers, NULL);
+
+#ifdef CONFIG_BLK_DEV_AEC6210
+	if ((aec6210_display_info) && (aec6210_proc))
+		create_proc_info_entry("aec6210", 0, proc_ide_root, aec6210_display_info);
+#endif /* CONFIG_BLK_DEV_AEC6210 */
+#ifdef CONFIG_BLK_DEV_ALI15X3
+	if ((ali_display_info) && (ali_proc))
+		create_proc_info_entry("ali", 0, proc_ide_root, ali_display_info);
+#endif /* CONFIG_BLK_DEV_ALI15X3 */
+#ifdef CONFIG_BLK_DEV_AMD7409
+	if ((amd7409_display_info) && (amd7409_proc))
+		create_proc_info_entry("amd7409", 0, proc_ide_root, amd7409_display_info);
+#endif /* CONFIG_BLK_DEV_AMD7409 */
+#ifdef CONFIG_BLK_DEV_CMD64X
+	if ((cmd64x_display_info) && (cmd64x_proc))
+		create_proc_info_entry("cmd64x", 0, proc_ide_root, cmd64x_display_info);
+#endif /* CONFIG_BLK_DEV_CMD64X */
+#ifdef CONFIG_BLK_DEV_CS5530
+	if ((cs5530_display_info) && (cs5530_proc))
+		create_proc_info_entry("cs5530", 0, proc_ide_root, cs5530_display_info);
+#endif /* CONFIG_BLK_DEV_CS5530 */
+#ifdef CONFIG_BLK_DEV_HPT34X
+	if ((hpt34x_display_info) && (hpt34x_proc))
+		create_proc_info_entry("hpt34x", 0, proc_ide_root, hpt34x_display_info);
+#endif /* CONFIG_BLK_DEV_HPT34X */
+#ifdef CONFIG_BLK_DEV_HPT366
+	if ((hpt366_display_info) && (hpt366_proc))
+		create_proc_info_entry("hpt366", 0, proc_ide_root, hpt366_display_info);
+#endif /* CONFIG_BLK_DEV_HPT366 */
+#ifdef CONFIG_BLK_DEV_PDC202XX
+	if ((pdc202xx_display_info) && (pdc202xx_proc))
+		create_proc_info_entry("pdc202xx", 0, proc_ide_root, pdc202xx_display_info);
+#endif /* CONFIG_BLK_DEV_PDC202XX */
+#ifdef CONFIG_BLK_DEV_PIIX
+	if ((piix_display_info) && (piix_proc))
+		create_proc_info_entry("piix", 0, proc_ide_root, piix_display_info);
+#endif /* CONFIG_BLK_DEV_PIIX */
+#ifdef CONFIG_BLK_DEV_SIS5513
+	if ((sis_display_info) && (sis_proc))
+		create_proc_info_entry("sis", 0, proc_ide_root, sis_display_info);
+#endif /* CONFIG_BLK_DEV_SIS5513 */
+#ifdef CONFIG_BLK_DEV_VIA82CXXX
+	if ((via_display_info) && (via_proc))
+		create_proc_info_entry("via", 0, proc_ide_root, via_display_info);
+#endif /* CONFIG_BLK_DEV_VIA82CXXX */
+}
+
+void proc_ide_destroy(void)
+{
+	/*
+	 * Mmmm.. does this free up all resources,
+	 * or do we need to do a more proper cleanup here ??
+	 */
+#ifdef CONFIG_BLK_DEV_AEC6210
+	if ((aec6210_display_info) && (aec6210_proc))
+		remove_proc_entry("ide/aec6210",0);
+#endif /* CONFIG_BLK_DEV_AEC6210 */
+#ifdef CONFIG_BLK_DEV_ALI15X3
+	if ((ali_display_info) && (ali_proc))
+		remove_proc_entry("ide/ali",0);
+#endif /* CONFIG_BLK_DEV_ALI15X3 */
+#ifdef CONFIG_BLK_DEV_AMD7409
+	if ((amd7409_display_info) && (amd7409_proc))
+		remove_proc_entry("ide/amd7409",0);
+#endif /* CONFIG_BLK_DEV_AMD7409 */
+#ifdef CONFIG_BLK_DEV_CMD64X
+	if ((cmd64x_display_info) && (cmd64x_proc))
+		remove_proc_entry("ide/cmd64x",0);
+#endif /* CONFIG_BLK_DEV_CMD64X */
+#ifdef CONFIG_BLK_DEV_CS5530
+	if ((cs5530_display_info) && (cs5530_proc))
+		remove_proc_entry("ide/cs5530",0);
+#endif /* CONFIG_BLK_DEV_CS5530 */
+#ifdef CONFIG_BLK_DEV_HPT34X
+	if ((hpt34x_display_info) && (hpt34x_proc))
+		remove_proc_entry("ide/hpt34x",0);
+#endif /* CONFIG_BLK_DEV_HPT34X */
+#ifdef CONFIG_BLK_DEV_HPT366
+	if ((hpt366_display_info) && (hpt366_proc))
+		remove_proc_entry("ide/hpt366",0);
+#endif /* CONFIG_BLK_DEV_HPT366 */
+#ifdef CONFIG_BLK_DEV_PDC202XX
+	if ((pdc202xx_display_info) && (pdc202xx_proc))
+		remove_proc_entry("ide/pdc202xx",0);
+#endif /* CONFIG_BLK_DEV_PDC202XX */
+#ifdef CONFIG_BLK_DEV_PIIX
+	if ((piix_display_info) && (piix_proc))
+		remove_proc_entry("ide/piix",0);
+#endif /* CONFIG_BLK_DEV_PIIX */
+#ifdef CONFIG_BLK_DEV_SIS5513
+	if ((sis_display_info) && (sis_proc))
+		remove_proc_entry("ide/sis", 0);
+#endif /* CONFIG_BLK_DEV_SIS5513 */
+#ifdef CONFIG_BLK_DEV_VIA82CXXX
+	if ((via_display_info) && (via_proc))
+		remove_proc_entry("ide/via",0);
+#endif /* CONFIG_BLK_DEV_VIA82CXXX */
+
+	remove_proc_entry("ide/drivers", 0);
+	destroy_proc_ide_interfaces();
+	remove_proc_entry("ide", 0);
+}