/* * 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/hdreg.h> #include <linux/ide.h> #include <asm/io.h> #ifndef MIN #define MIN(a,b) (((a) < (b)) ? (a) : (b)) #endif #ifdef CONFIG_BLK_DEV_AEC62XX extern byte aec62xx_proc; int (*aec62xx_display_info)(char *, char **, off_t, int) = NULL; #endif /* CONFIG_BLK_DEV_AEC62XX */ #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_AMD74XX extern byte amd74xx_proc; int (*amd74xx_display_info)(char *, char **, off_t, int) = NULL; #endif /* CONFIG_BLK_DEV_AMD74XX */ #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_SVWKS extern byte svwks_proc; int (*svwks_display_info)(char *, char **, off_t, int) = NULL; #endif /* CONFIG_BLK_DEV_SVWKS */ #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 struct proc_dir_entry * proc_ide_root = NULL; static int ide_getdigit(char c) { int digit; if (isdigit(c)) digit = c - '0'; else digit = -1; return digit; } static int proc_ide_read_imodel (char *page, char **start, off_t off, int count, int *eof, void *data) { struct ata_channel *hwif = 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_qd65xx: name = "qd65xx"; 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_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_channel (char *page, char **start, off_t off, int count, int *eof, void *data) { struct ata_channel *hwif = data; int len; page[0] = hwif->unit ? '1' : '0'; page[1] = '\n'; len = 2; PROC_IDE_READ_RETURN(page,start,off,count,eof,len); } static int get_identify(ide_drive_t *drive, u8 *buf) { struct ata_taskfile args; memset(&args, 0, sizeof(args)); args.taskfile.sector_count = 0x01; args.taskfile.command = (drive->type == ATA_DISK) ? WIN_IDENTIFY : WIN_PIDENTIFY ; ide_cmd_type_parser(&args); return ide_raw_taskfile(drive, &args, buf); } static int proc_ide_read_identify (char *page, char **start, off_t off, int count, int *eof, void *data) { ide_drive_t *drive = data; int len = 0; int i = 0; if (drive && !get_identify(drive, page)) { unsigned short *val = (unsigned short *) page; 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 = data; ide_settings_t *setting = 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 = 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 = min(p - start, MAX_LEN); strncpy(name, start, 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; } /* Find setting by name */ setting = drive->settings; while (setting) { if (strcmp(setting->name, name) == 0) break; setting = setting->next; } 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 = data; struct ata_operations *driver = drive->driver; int len; if (!driver) len = sprintf(page, "(none)\n"); else len = sprintf(page,"%llu\n", (unsigned long long) ata_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 = 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 = 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_media (char *page, char **start, off_t off, int count, int *eof, void *data) { ide_drive_t *drive = data; const char *type; int len; switch (drive->type) { case ATA_DISK: type = "disk\n"; break; case ATA_ROM: type = "cdrom\n"; break; case ATA_TAPE: type = "tape\n"; break; case ATA_FLOPPY:type = "floppy\n"; break; default: type = "UNKNOWN\n"; break; } strcpy(page,type); len = strlen(type); PROC_IDE_READ_RETURN(page,start,off,count,eof,len); } static ide_proc_entry_t generic_drive_entries[] = { { "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++; } } /* FIXME: we should iterate over the hwifs here as everywhere else. */ static void create_proc_ide_drives(struct ata_channel *hwif) { int d; struct proc_dir_entry *parent = hwif->proc; char name[64]; for (d = 0; d < MAX_DRIVES; d++) { ide_drive_t *drive = &hwif->drives[d]; struct ata_operations *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); } } static void destroy_proc_ide_device(struct ata_channel *hwif, ide_drive_t *drive) { struct ata_operations *driver = drive->driver; if (drive->proc) { 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; } } void destroy_proc_ide_drives(struct ata_channel *hwif) { int d; for (d = 0; d < MAX_DRIVES; d++) { ide_drive_t *drive = &hwif->drives[d]; if (drive->proc) destroy_proc_ide_device(hwif, drive); } } static ide_proc_entry_t hwif_entries[] = { { "channel", S_IFREG|S_IRUGO, proc_ide_read_channel, 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++) { struct ata_channel *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++) { struct ata_channel *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(); #ifdef CONFIG_BLK_DEV_AEC62XX if ((aec62xx_display_info) && (aec62xx_proc)) create_proc_info_entry("aec62xx", 0, proc_ide_root, aec62xx_display_info); #endif /* CONFIG_BLK_DEV_AEC62XX */ #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_AMD74XX if ((amd74xx_display_info) && (amd74xx_proc)) create_proc_info_entry("amd74xx", 0, proc_ide_root, amd74xx_display_info); #endif /* CONFIG_BLK_DEV_AMD74XX */ #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_SVWKS if ((svwks_display_info) && (svwks_proc)) create_proc_info_entry("svwks", 0, proc_ide_root, svwks_display_info); #endif /* CONFIG_BLK_DEV_SVWKS */ #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_AEC62XX if ((aec62xx_display_info) && (aec62xx_proc)) remove_proc_entry("ide/aec62xx",0); #endif /* CONFIG_BLK_DEV_AEC62XX */ #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_AMD74XX if ((amd74xx_display_info) && (amd74xx_proc)) remove_proc_entry("ide/amd74xx",0); #endif /* CONFIG_BLK_DEV_AMD74XX */ #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_SVWKS if ((svwks_display_info) && (svwks_proc)) remove_proc_entry("ide/svwks",0); #endif /* CONFIG_BLK_DEV_SVWKS */ #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); }