diff options
Diffstat (limited to 'drivers/ide/ide-disk.c')
| -rw-r--r-- | drivers/ide/ide-disk.c | 1280 |
1 files changed, 1280 insertions, 0 deletions
diff --git a/drivers/ide/ide-disk.c b/drivers/ide/ide-disk.c new file mode 100644 index 000000000000..5d54f7756100 --- /dev/null +++ b/drivers/ide/ide-disk.c @@ -0,0 +1,1280 @@ +/* + * linux/drivers/ide/ide-disk.c Version 1.18 Mar 05, 2003 + * + * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) + * Copyright (C) 1998-2002 Linux ATA Development + * Andre Hedrick <andre@linux-ide.org> + * Copyright (C) 2003 Red Hat <alan@redhat.com> + */ + +/* + * Mostly written by Mark Lord <mlord@pobox.com> + * and Gadi Oxman <gadio@netvision.net.il> + * and Andre Hedrick <andre@linux-ide.org> + * + * This is the IDE/ATA disk driver, as evolved from hd.c and ide.c. + * + * Version 1.00 move disk only code from ide.c to ide-disk.c + * support optional byte-swapping of all data + * Version 1.01 fix previous byte-swapping code + * Version 1.02 remove ", LBA" from drive identification msgs + * Version 1.03 fix display of id->buf_size for big-endian + * Version 1.04 add /proc configurable settings and S.M.A.R.T support + * Version 1.05 add capacity support for ATA3 >= 8GB + * Version 1.06 get boot-up messages to show full cyl count + * Version 1.07 disable door-locking if it fails + * Version 1.08 fixed CHS/LBA translations for ATA4 > 8GB, + * process of adding new ATA4 compliance. + * fixed problems in allowing fdisk to see + * the entire disk. + * Version 1.09 added increment of rq->sector in ide_multwrite + * added UDMA 3/4 reporting + * Version 1.10 request queue changes, Ultra DMA 100 + * Version 1.11 added 48-bit lba + * Version 1.12 adding taskfile io access method + * Version 1.13 added standby and flush-cache for notifier + * Version 1.14 added acoustic-wcache + * Version 1.15 convert all calls to ide_raw_taskfile + * since args will return register content. + * Version 1.16 added suspend-resume-checkpower + * Version 1.17 do flush on standy, do flush on ATA < ATA6 + * fix wcache setup. + */ + +#define IDEDISK_VERSION "1.18" + +#undef REALLY_SLOW_IO /* most systems can safely undef this */ + +//#define DEBUG + +#include <linux/config.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/string.h> +#include <linux/kernel.h> +#include <linux/timer.h> +#include <linux/mm.h> +#include <linux/interrupt.h> +#include <linux/major.h> +#include <linux/errno.h> +#include <linux/genhd.h> +#include <linux/slab.h> +#include <linux/delay.h> + +#define _IDE_DISK + +#include <linux/ide.h> + +#include <asm/byteorder.h> +#include <asm/irq.h> +#include <asm/uaccess.h> +#include <asm/io.h> +#include <asm/div64.h> + +struct ide_disk_obj { + ide_drive_t *drive; + ide_driver_t *driver; + struct gendisk *disk; + struct kref kref; +}; + +static DECLARE_MUTEX(idedisk_ref_sem); + +#define to_ide_disk(obj) container_of(obj, struct ide_disk_obj, kref) + +#define ide_disk_g(disk) \ + container_of((disk)->private_data, struct ide_disk_obj, driver) + +static struct ide_disk_obj *ide_disk_get(struct gendisk *disk) +{ + struct ide_disk_obj *idkp = NULL; + + down(&idedisk_ref_sem); + idkp = ide_disk_g(disk); + if (idkp) + kref_get(&idkp->kref); + up(&idedisk_ref_sem); + return idkp; +} + +static void ide_disk_release(struct kref *); + +static void ide_disk_put(struct ide_disk_obj *idkp) +{ + down(&idedisk_ref_sem); + kref_put(&idkp->kref, ide_disk_release); + up(&idedisk_ref_sem); +} + +/* + * lba_capacity_is_ok() performs a sanity check on the claimed "lba_capacity" + * value for this drive (from its reported identification information). + * + * Returns: 1 if lba_capacity looks sensible + * 0 otherwise + * + * It is called only once for each drive. + */ +static int lba_capacity_is_ok (struct hd_driveid *id) +{ + unsigned long lba_sects, chs_sects, head, tail; + + /* + * The ATA spec tells large drives to return + * C/H/S = 16383/16/63 independent of their size. + * Some drives can be jumpered to use 15 heads instead of 16. + * Some drives can be jumpered to use 4092 cyls instead of 16383. + */ + if ((id->cyls == 16383 + || (id->cyls == 4092 && id->cur_cyls == 16383)) && + id->sectors == 63 && + (id->heads == 15 || id->heads == 16) && + (id->lba_capacity >= 16383*63*id->heads)) + return 1; + + lba_sects = id->lba_capacity; + chs_sects = id->cyls * id->heads * id->sectors; + + /* perform a rough sanity check on lba_sects: within 10% is OK */ + if ((lba_sects - chs_sects) < chs_sects/10) + return 1; + + /* some drives have the word order reversed */ + head = ((lba_sects >> 16) & 0xffff); + tail = (lba_sects & 0xffff); + lba_sects = (head | (tail << 16)); + if ((lba_sects - chs_sects) < chs_sects/10) { + id->lba_capacity = lba_sects; + return 1; /* lba_capacity is (now) good */ + } + + return 0; /* lba_capacity value may be bad */ +} + +/* + * __ide_do_rw_disk() issues READ and WRITE commands to a disk, + * using LBA if supported, or CHS otherwise, to address sectors. + */ +static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq, sector_t block) +{ + ide_hwif_t *hwif = HWIF(drive); + unsigned int dma = drive->using_dma; + u8 lba48 = (drive->addressing == 1) ? 1 : 0; + task_ioreg_t command = WIN_NOP; + ata_nsector_t nsectors; + + nsectors.all = (u16) rq->nr_sectors; + + if (hwif->no_lba48_dma && lba48 && dma) { + if (block + rq->nr_sectors > 1ULL << 28) + dma = 0; + else + lba48 = 0; + } + + if (!dma) { + ide_init_sg_cmd(drive, rq); + ide_map_sg(drive, rq); + } + + if (IDE_CONTROL_REG) + hwif->OUTB(drive->ctl, IDE_CONTROL_REG); + + /* FIXME: SELECT_MASK(drive, 0) ? */ + + if (drive->select.b.lba) { + if (lba48) { + task_ioreg_t tasklets[10]; + + pr_debug("%s: LBA=0x%012llx\n", drive->name, block); + + tasklets[0] = 0; + tasklets[1] = 0; + tasklets[2] = nsectors.b.low; + tasklets[3] = nsectors.b.high; + tasklets[4] = (task_ioreg_t) block; + tasklets[5] = (task_ioreg_t) (block>>8); + tasklets[6] = (task_ioreg_t) (block>>16); + tasklets[7] = (task_ioreg_t) (block>>24); + if (sizeof(block) == 4) { + tasklets[8] = (task_ioreg_t) 0; + tasklets[9] = (task_ioreg_t) 0; + } else { + tasklets[8] = (task_ioreg_t)((u64)block >> 32); + tasklets[9] = (task_ioreg_t)((u64)block >> 40); + } +#ifdef DEBUG + printk("%s: 0x%02x%02x 0x%02x%02x%02x%02x%02x%02x\n", + drive->name, tasklets[3], tasklets[2], + tasklets[9], tasklets[8], tasklets[7], + tasklets[6], tasklets[5], tasklets[4]); +#endif + hwif->OUTB(tasklets[1], IDE_FEATURE_REG); + hwif->OUTB(tasklets[3], IDE_NSECTOR_REG); + hwif->OUTB(tasklets[7], IDE_SECTOR_REG); + hwif->OUTB(tasklets[8], IDE_LCYL_REG); + hwif->OUTB(tasklets[9], IDE_HCYL_REG); + + hwif->OUTB(tasklets[0], IDE_FEATURE_REG); + hwif->OUTB(tasklets[2], IDE_NSECTOR_REG); + hwif->OUTB(tasklets[4], IDE_SECTOR_REG); + hwif->OUTB(tasklets[5], IDE_LCYL_REG); + hwif->OUTB(tasklets[6], IDE_HCYL_REG); + hwif->OUTB(0x00|drive->select.all,IDE_SELECT_REG); + } else { + hwif->OUTB(0x00, IDE_FEATURE_REG); + hwif->OUTB(nsectors.b.low, IDE_NSECTOR_REG); + hwif->OUTB(block, IDE_SECTOR_REG); + hwif->OUTB(block>>=8, IDE_LCYL_REG); + hwif->OUTB(block>>=8, IDE_HCYL_REG); + hwif->OUTB(((block>>8)&0x0f)|drive->select.all,IDE_SELECT_REG); + } + } else { + unsigned int sect,head,cyl,track; + track = (int)block / drive->sect; + sect = (int)block % drive->sect + 1; + hwif->OUTB(sect, IDE_SECTOR_REG); + head = track % drive->head; + cyl = track / drive->head; + + pr_debug("%s: CHS=%u/%u/%u\n", drive->name, cyl, head, sect); + + hwif->OUTB(0x00, IDE_FEATURE_REG); + hwif->OUTB(nsectors.b.low, IDE_NSECTOR_REG); + hwif->OUTB(cyl, IDE_LCYL_REG); + hwif->OUTB(cyl>>8, IDE_HCYL_REG); + hwif->OUTB(head|drive->select.all,IDE_SELECT_REG); + } + + if (dma) { + if (!hwif->dma_setup(drive)) { + if (rq_data_dir(rq)) { + command = lba48 ? WIN_WRITEDMA_EXT : WIN_WRITEDMA; + if (drive->vdma) + command = lba48 ? WIN_WRITE_EXT: WIN_WRITE; + } else { + command = lba48 ? WIN_READDMA_EXT : WIN_READDMA; + if (drive->vdma) + command = lba48 ? WIN_READ_EXT: WIN_READ; + } + hwif->dma_exec_cmd(drive, command); + hwif->dma_start(drive); + return ide_started; + } + /* fallback to PIO */ + ide_init_sg_cmd(drive, rq); + } + + if (rq_data_dir(rq) == READ) { + + if (drive->mult_count) { + hwif->data_phase = TASKFILE_MULTI_IN; + command = lba48 ? WIN_MULTREAD_EXT : WIN_MULTREAD; + } else { + hwif->data_phase = TASKFILE_IN; + command = lba48 ? WIN_READ_EXT : WIN_READ; + } + + ide_execute_command(drive, command, &task_in_intr, WAIT_CMD, NULL); + return ide_started; + } else { + if (drive->mult_count) { + hwif->data_phase = TASKFILE_MULTI_OUT; + command = lba48 ? WIN_MULTWRITE_EXT : WIN_MULTWRITE; + } else { + hwif->data_phase = TASKFILE_OUT; + command = lba48 ? WIN_WRITE_EXT : WIN_WRITE; + } + + /* FIXME: ->OUTBSYNC ? */ + hwif->OUTB(command, IDE_COMMAND_REG); + + return pre_task_out_intr(drive, rq); + } +} + +/* + * 268435455 == 137439 MB or 28bit limit + * 320173056 == 163929 MB or 48bit addressing + * 1073741822 == 549756 MB or 48bit addressing fake drive + */ + +static ide_startstop_t ide_do_rw_disk (ide_drive_t *drive, struct request *rq, sector_t block) +{ + ide_hwif_t *hwif = HWIF(drive); + + BUG_ON(drive->blocked); + + if (!blk_fs_request(rq)) { + blk_dump_rq_flags(rq, "ide_do_rw_disk - bad command"); + ide_end_request(drive, 0, 0); + return ide_stopped; + } + + pr_debug("%s: %sing: block=%llu, sectors=%lu, buffer=0x%08lx\n", + drive->name, rq_data_dir(rq) == READ ? "read" : "writ", + block, rq->nr_sectors, (unsigned long)rq->buffer); + + if (hwif->rw_disk) + hwif->rw_disk(drive, rq); + + return __ide_do_rw_disk(drive, rq, block); +} + +/* + * Queries for true maximum capacity of the drive. + * Returns maximum LBA address (> 0) of the drive, 0 if failed. + */ +static unsigned long idedisk_read_native_max_address(ide_drive_t *drive) +{ + ide_task_t args; + unsigned long addr = 0; + + /* Create IDE/ATA command request structure */ + memset(&args, 0, sizeof(ide_task_t)); + args.tfRegister[IDE_SELECT_OFFSET] = 0x40; + args.tfRegister[IDE_COMMAND_OFFSET] = WIN_READ_NATIVE_MAX; + args.command_type = IDE_DRIVE_TASK_NO_DATA; + args.handler = &task_no_data_intr; + /* submit command request */ + ide_raw_taskfile(drive, &args, NULL); + + /* if OK, compute maximum address value */ + if ((args.tfRegister[IDE_STATUS_OFFSET] & 0x01) == 0) { + addr = ((args.tfRegister[IDE_SELECT_OFFSET] & 0x0f) << 24) + | ((args.tfRegister[ IDE_HCYL_OFFSET] ) << 16) + | ((args.tfRegister[ IDE_LCYL_OFFSET] ) << 8) + | ((args.tfRegister[IDE_SECTOR_OFFSET] )); + addr++; /* since the return value is (maxlba - 1), we add 1 */ + } + return addr; +} + +static unsigned long long idedisk_read_native_max_address_ext(ide_drive_t *drive) +{ + ide_task_t args; + unsigned long long addr = 0; + + /* Create IDE/ATA command request structure */ + memset(&args, 0, sizeof(ide_task_t)); + + args.tfRegister[IDE_SELECT_OFFSET] = 0x40; + args.tfRegister[IDE_COMMAND_OFFSET] = WIN_READ_NATIVE_MAX_EXT; + args.command_type = IDE_DRIVE_TASK_NO_DATA; + args.handler = &task_no_data_intr; + /* submit command request */ + ide_raw_taskfile(drive, &args, NULL); + + /* if OK, compute maximum address value */ + if ((args.tfRegister[IDE_STATUS_OFFSET] & 0x01) == 0) { + u32 high = (args.hobRegister[IDE_HCYL_OFFSET] << 16) | + (args.hobRegister[IDE_LCYL_OFFSET] << 8) | + args.hobRegister[IDE_SECTOR_OFFSET]; + u32 low = ((args.tfRegister[IDE_HCYL_OFFSET])<<16) | + ((args.tfRegister[IDE_LCYL_OFFSET])<<8) | + (args.tfRegister[IDE_SECTOR_OFFSET]); + addr = ((__u64)high << 24) | low; + addr++; /* since the return value is (maxlba - 1), we add 1 */ + } + return addr; +} + +/* + * Sets maximum virtual LBA address of the drive. + * Returns new maximum virtual LBA address (> 0) or 0 on failure. + */ +static unsigned long idedisk_set_max_address(ide_drive_t *drive, unsigned long addr_req) +{ + ide_task_t args; + unsigned long addr_set = 0; + + addr_req--; + /* Create IDE/ATA command request structure */ + memset(&args, 0, sizeof(ide_task_t)); + args.tfRegister[IDE_SECTOR_OFFSET] = ((addr_req >> 0) & 0xff); + args.tfRegister[IDE_LCYL_OFFSET] = ((addr_req >> 8) & 0xff); + args.tfRegister[IDE_HCYL_OFFSET] = ((addr_req >> 16) & 0xff); + args.tfRegister[IDE_SELECT_OFFSET] = ((addr_req >> 24) & 0x0f) | 0x40; + args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SET_MAX; + args.command_type = IDE_DRIVE_TASK_NO_DATA; + args.handler = &task_no_data_intr; + /* submit command request */ + ide_raw_taskfile(drive, &args, NULL); + /* if OK, read new maximum address value */ + if ((args.tfRegister[IDE_STATUS_OFFSET] & 0x01) == 0) { + addr_set = ((args.tfRegister[IDE_SELECT_OFFSET] & 0x0f) << 24) + | ((args.tfRegister[ IDE_HCYL_OFFSET] ) << 16) + | ((args.tfRegister[ IDE_LCYL_OFFSET] ) << 8) + | ((args.tfRegister[IDE_SECTOR_OFFSET] )); + addr_set++; + } + return addr_set; +} + +static unsigned long long idedisk_set_max_address_ext(ide_drive_t *drive, unsigned long long addr_req) +{ + ide_task_t args; + unsigned long long addr_set = 0; + + addr_req--; + /* Create IDE/ATA command request structure */ + memset(&args, 0, sizeof(ide_task_t)); + args.tfRegister[IDE_SECTOR_OFFSET] = ((addr_req >> 0) & 0xff); + args.tfRegister[IDE_LCYL_OFFSET] = ((addr_req >>= 8) & 0xff); + args.tfRegister[IDE_HCYL_OFFSET] = ((addr_req >>= 8) & 0xff); + args.tfRegister[IDE_SELECT_OFFSET] = 0x40; + args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SET_MAX_EXT; + args.hobRegister[IDE_SECTOR_OFFSET] = (addr_req >>= 8) & 0xff; + args.hobRegister[IDE_LCYL_OFFSET] = (addr_req >>= 8) & 0xff; + args.hobRegister[IDE_HCYL_OFFSET] = (addr_req >>= 8) & 0xff; + args.hobRegister[IDE_SELECT_OFFSET] = 0x40; + args.hobRegister[IDE_CONTROL_OFFSET_HOB]= (drive->ctl|0x80); + args.command_type = IDE_DRIVE_TASK_NO_DATA; + args.handler = &task_no_data_intr; + /* submit command request */ + ide_raw_taskfile(drive, &args, NULL); + /* if OK, compute maximum address value */ + if ((args.tfRegister[IDE_STATUS_OFFSET] & 0x01) == 0) { + u32 high = (args.hobRegister[IDE_HCYL_OFFSET] << 16) | + (args.hobRegister[IDE_LCYL_OFFSET] << 8) | + args.hobRegister[IDE_SECTOR_OFFSET]; + u32 low = ((args.tfRegister[IDE_HCYL_OFFSET])<<16) | + ((args.tfRegister[IDE_LCYL_OFFSET])<<8) | + (args.tfRegister[IDE_SECTOR_OFFSET]); + addr_set = ((__u64)high << 24) | low; + addr_set++; + } + return addr_set; +} + +static unsigned long long sectors_to_MB(unsigned long long n) +{ + n <<= 9; /* make it bytes */ + do_div(n, 1000000); /* make it MB */ + return n; +} + +/* + * Bits 10 of command_set_1 and cfs_enable_1 must be equal, + * so on non-buggy drives we need test only one. + * However, we should also check whether these fields are valid. + */ +static inline int idedisk_supports_hpa(const struct hd_driveid *id) +{ + return (id->command_set_1 & 0x0400) && (id->cfs_enable_1 & 0x0400); +} + +/* + * The same here. + */ +static inline int idedisk_supports_lba48(const struct hd_driveid *id) +{ + return (id->command_set_2 & 0x0400) && (id->cfs_enable_2 & 0x0400) + && id->lba_capacity_2; +} + +static inline void idedisk_check_hpa(ide_drive_t *drive) +{ + unsigned long long capacity, set_max; + int lba48 = idedisk_supports_lba48(drive->id); + + capacity = drive->capacity64; + if (lba48) + set_max = idedisk_read_native_max_address_ext(drive); + else + set_max = idedisk_read_native_max_address(drive); + + if (set_max <= capacity) + return; + + printk(KERN_INFO "%s: Host Protected Area detected.\n" + "\tcurrent capacity is %llu sectors (%llu MB)\n" + "\tnative capacity is %llu sectors (%llu MB)\n", + drive->name, + capacity, sectors_to_MB(capacity), + set_max, sectors_to_MB(set_max)); + + if (lba48) + set_max = idedisk_set_max_address_ext(drive, set_max); + else + set_max = idedisk_set_max_address(drive, set_max); + if (set_max) { + drive->capacity64 = set_max; + printk(KERN_INFO "%s: Host Protected Area disabled.\n", + drive->name); + } +} + +/* + * Compute drive->capacity, the full capacity of the drive + * Called with drive->id != NULL. + * + * To compute capacity, this uses either of + * + * 1. CHS value set by user (whatever user sets will be trusted) + * 2. LBA value from target drive (require new ATA feature) + * 3. LBA value from system BIOS (new one is OK, old one may break) + * 4. CHS value from system BIOS (traditional style) + * + * in above order (i.e., if value of higher priority is available, + * reset will be ignored). + */ +static void init_idedisk_capacity (ide_drive_t *drive) +{ + struct hd_driveid *id = drive->id; + /* + * If this drive supports the Host Protected Area feature set, + * then we may need to change our opinion about the drive's capacity. + */ + int hpa = idedisk_supports_hpa(id); + + if (idedisk_supports_lba48(id)) { + /* drive speaks 48-bit LBA */ + drive->select.b.lba = 1; + drive->capacity64 = id->lba_capacity_2; + if (hpa) + idedisk_check_hpa(drive); + } else if ((id->capability & 2) && lba_capacity_is_ok(id)) { + /* drive speaks 28-bit LBA */ + drive->select.b.lba = 1; + drive->capacity64 = id->lba_capacity; + if (hpa) + idedisk_check_hpa(drive); + } else { + /* drive speaks boring old 28-bit CHS */ + drive->capacity64 = drive->cyl * drive->head * drive->sect; + } +} + +static sector_t idedisk_capacity (ide_drive_t *drive) +{ + return drive->capacity64 - drive->sect0; +} + +#ifdef CONFIG_PROC_FS + +static int smart_enable(ide_drive_t *drive) +{ + ide_task_t args; + + memset(&args, 0, sizeof(ide_task_t)); + args.tfRegister[IDE_FEATURE_OFFSET] = SMART_ENABLE; + args.tfRegister[IDE_LCYL_OFFSET] = SMART_LCYL_PASS; + args.tfRegister[IDE_HCYL_OFFSET] = SMART_HCYL_PASS; + args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SMART; + args.command_type = IDE_DRIVE_TASK_NO_DATA; + args.handler = &task_no_data_intr; + return ide_raw_taskfile(drive, &args, NULL); +} + +static int get_smart_values(ide_drive_t *drive, u8 *buf) +{ + ide_task_t args; + + memset(&args, 0, sizeof(ide_task_t)); + args.tfRegister[IDE_FEATURE_OFFSET] = SMART_READ_VALUES; + args.tfRegister[IDE_NSECTOR_OFFSET] = 0x01; + args.tfRegister[IDE_LCYL_OFFSET] = SMART_LCYL_PASS; + args.tfRegister[IDE_HCYL_OFFSET] = SMART_HCYL_PASS; + args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SMART; + args.command_type = IDE_DRIVE_TASK_IN; + args.data_phase = TASKFILE_IN; + args.handler = &task_in_intr; + (void) smart_enable(drive); + return ide_raw_taskfile(drive, &args, buf); +} + +static int get_smart_thresholds(ide_drive_t *drive, u8 *buf) +{ + ide_task_t args; + memset(&args, 0, sizeof(ide_task_t)); + args.tfRegister[IDE_FEATURE_OFFSET] = SMART_READ_THRESHOLDS; + args.tfRegister[IDE_NSECTOR_OFFSET] = 0x01; + args.tfRegister[IDE_LCYL_OFFSET] = SMART_LCYL_PASS; + args.tfRegister[IDE_HCYL_OFFSET] = SMART_HCYL_PASS; + args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SMART; + args.command_type = IDE_DRIVE_TASK_IN; + args.data_phase = TASKFILE_IN; + args.handler = &task_in_intr; + (void) smart_enable(drive); + return ide_raw_taskfile(drive, &args, buf); +} + +static int proc_idedisk_read_cache + (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; + + if (drive->id_read) + len = sprintf(out,"%i\n", drive->id->buf_size / 2); + else + len = sprintf(out,"(none)\n"); + PROC_IDE_READ_RETURN(page,start,off,count,eof,len); +} + +static int proc_idedisk_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,"%llu\n", (long long)idedisk_capacity(drive)); + PROC_IDE_READ_RETURN(page,start,off,count,eof,len); +} + +static int proc_idedisk_read_smart_thresholds + (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 (!get_smart_thresholds(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; + } + PROC_IDE_READ_RETURN(page,start,off,count,eof,len); +} + +static int proc_idedisk_read_smart_values + (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 (!get_smart_values(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; + } + PROC_IDE_READ_RETURN(page,start,off,count,eof,len); +} + +static ide_proc_entry_t idedisk_proc[] = { + { "cache", S_IFREG|S_IRUGO, proc_idedisk_read_cache, NULL }, + { "capacity", S_IFREG|S_IRUGO, proc_idedisk_read_capacity, NULL }, + { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL }, + { "smart_values", S_IFREG|S_IRUSR, proc_idedisk_read_smart_values, NULL }, + { "smart_thresholds", S_IFREG|S_IRUSR, proc_idedisk_read_smart_thresholds, NULL }, + { NULL, 0, NULL, NULL } +}; + +#else + +#define idedisk_proc NULL + +#endif /* CONFIG_PROC_FS */ + +static void idedisk_end_flush(request_queue_t *q, struct request *flush_rq) +{ + ide_drive_t *drive = q->queuedata; + struct request *rq = flush_rq->end_io_data; + int good_sectors = rq->hard_nr_sectors; + int bad_sectors; + sector_t sector; + + if (flush_rq->errors & ABRT_ERR) { + printk(KERN_ERR "%s: barrier support doesn't work\n", drive->name); + blk_queue_ordered(drive->queue, QUEUE_ORDERED_NONE); + blk_queue_issue_flush_fn(drive->queue, NULL); + good_sectors = 0; + } else if (flush_rq->errors) { + good_sectors = 0; + if (blk_barrier_preflush(rq)) { + sector = ide_get_error_location(drive,flush_rq->buffer); + if ((sector >= rq->hard_sector) && + (sector < rq->hard_sector + rq->hard_nr_sectors)) + good_sectors = sector - rq->hard_sector; + } + } + + if (flush_rq->errors) + printk(KERN_ERR "%s: failed barrier write: " + "sector=%Lx(good=%d/bad=%d)\n", + drive->name, (unsigned long long)rq->sector, + good_sectors, + (int) (rq->hard_nr_sectors-good_sectors)); + + bad_sectors = rq->hard_nr_sectors - good_sectors; + + if (good_sectors) + __ide_end_request(drive, rq, 1, good_sectors); + if (bad_sectors) + __ide_end_request(drive, rq, 0, bad_sectors); +} + +static int idedisk_prepare_flush(request_queue_t *q, struct request *rq) +{ + ide_drive_t *drive = q->queuedata; + + if (!drive->wcache) + return 0; + + memset(rq->cmd, 0, sizeof(rq->cmd)); + + if (ide_id_has_flush_cache_ext(drive->id) && + (drive->capacity64 >= (1UL << 28))) + rq->cmd[0] = WIN_FLUSH_CACHE_EXT; + else + rq->cmd[0] = WIN_FLUSH_CACHE; + + + rq->flags |= REQ_DRIVE_TASK | REQ_SOFTBARRIER; + rq->buffer = rq->cmd; + return 1; +} + +static int idedisk_issue_flush(request_queue_t *q, struct gendisk *disk, + sector_t *error_sector) +{ + ide_drive_t *drive = q->queuedata; + struct request *rq; + int ret; + + if (!drive->wcache) + return 0; + + rq = blk_get_request(q, WRITE, __GFP_WAIT); + + idedisk_prepare_flush(q, rq); + + ret = blk_execute_rq(q, disk, rq); + + /* + * if we failed and caller wants error offset, get it + */ + if (ret && error_sector) + *error_sector = ide_get_error_location(drive, rq->cmd); + + blk_put_request(rq); + return ret; +} + +/* + * This is tightly woven into the driver->do_special can not touch. + * DON'T do it again until a total personality rewrite is committed. + */ +static int set_multcount(ide_drive_t *drive, int arg) +{ + struct request rq; + + if (drive->special.b.set_multmode) + return -EBUSY; + ide_init_drive_cmd (&rq); + rq.flags = REQ_DRIVE_CMD; + drive->mult_req = arg; + drive->special.b.set_multmode = 1; + (void) ide_do_drive_cmd (drive, &rq, ide_wait); + return (drive->mult_count == arg) ? 0 : -EIO; +} + +static int set_nowerr(ide_drive_t *drive, int arg) +{ + if (ide_spin_wait_hwgroup(drive)) + return -EBUSY; + drive->nowerr = arg; + drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT; + spin_unlock_irq(&ide_lock); + return 0; +} + +static int write_cache(ide_drive_t *drive, int arg) +{ + ide_task_t args; + int err; + + if (!ide_id_has_flush_cache(drive->id)) + return 1; + + memset(&args, 0, sizeof(ide_task_t)); + args.tfRegister[IDE_FEATURE_OFFSET] = (arg) ? + SETFEATURES_EN_WCACHE : SETFEATURES_DIS_WCACHE; + args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SETFEATURES; + args.command_type = IDE_DRIVE_TASK_NO_DATA; + args.handler = &task_no_data_intr; + + err = ide_raw_taskfile(drive, &args, NULL); + if (err) + return err; + + drive->wcache = arg; + return 0; +} + +static int do_idedisk_flushcache (ide_drive_t *drive) +{ + ide_task_t args; + + memset(&args, 0, sizeof(ide_task_t)); + if (ide_id_has_flush_cache_ext(drive->id)) + args.tfRegister[IDE_COMMAND_OFFSET] = WIN_FLUSH_CACHE_EXT; + else + args.tfRegister[IDE_COMMAND_OFFSET] = WIN_FLUSH_CACHE; + args.command_type = IDE_DRIVE_TASK_NO_DATA; + args.handler = &task_no_data_intr; + return ide_raw_taskfile(drive, &args, NULL); +} + +static int set_acoustic (ide_drive_t *drive, int arg) +{ + ide_task_t args; + + memset(&args, 0, sizeof(ide_task_t)); + args.tfRegister[IDE_FEATURE_OFFSET] = (arg) ? SETFEATURES_EN_AAM : + SETFEATURES_DIS_AAM; + args.tfRegister[IDE_NSECTOR_OFFSET] = arg; + args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SETFEATURES; + args.command_type = IDE_DRIVE_TASK_NO_DATA; + args.handler = &task_no_data_intr; + ide_raw_taskfile(drive, &args, NULL); + drive->acoustic = arg; + return 0; +} + +/* + * drive->addressing: + * 0: 28-bit + * 1: 48-bit + * 2: 48-bit capable doing 28-bit + */ +static int set_lba_addressing(ide_drive_t *drive, int arg) +{ + drive->addressing = 0; + + if (HWIF(drive)->no_lba48) + return 0; + + if (!idedisk_supports_lba48(drive->id)) + return -EIO; + drive->addressing = arg; + return 0; +} + +static void idedisk_add_settings(ide_drive_t *drive) +{ + struct hd_driveid *id = drive->id; + + ide_add_setting(drive, "bios_cyl", SETTING_RW, -1, -1, TYPE_INT, 0, 65535, 1, 1, &drive->bios_cyl, NULL); + ide_add_setting(drive, "bios_head", SETTING_RW, -1, -1, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL); + ide_add_setting(drive, "bios_sect", SETTING_RW, -1, -1, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL); + ide_add_setting(drive, "address", SETTING_RW, HDIO_GET_ADDRESS, HDIO_SET_ADDRESS, TYPE_INTA, 0, 2, 1, 1, &drive->addressing, set_lba_addressing); + ide_add_setting(drive, "bswap", SETTING_READ, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->bswap, NULL); + ide_add_setting(drive, "multcount", id ? SETTING_RW : SETTING_READ, HDIO_GET_MULTCOUNT, HDIO_SET_MULTCOUNT, TYPE_BYTE, 0, id ? id->max_multsect : 0, 1, 1, &drive->mult_count, set_multcount); + ide_add_setting(drive, "nowerr", SETTING_RW, HDIO_GET_NOWERR, HDIO_SET_NOWERR, TYPE_BYTE, 0, 1, 1, 1, &drive->nowerr, set_nowerr); + ide_add_setting(drive, "lun", SETTING_RW, -1, -1, TYPE_INT, 0, 7, 1, 1, &drive->lun, NULL); + ide_add_setting(drive, "wcache", SETTING_RW, HDIO_GET_WCACHE, HDIO_SET_WCACHE, TYPE_BYTE, 0, 1, 1, 1, &drive->wcache, write_cache); + ide_add_setting(drive, "acoustic", SETTING_RW, HDIO_GET_ACOUSTIC, HDIO_SET_ACOUSTIC, TYPE_BYTE, 0, 254, 1, 1, &drive->acoustic, set_acoustic); + ide_add_setting(drive, "failures", SETTING_RW, -1, -1, TYPE_INT, 0, 65535, 1, 1, &drive->failures, NULL); + ide_add_setting(drive, "max_failures", SETTING_RW, -1, -1, TYPE_INT, 0, 65535, 1, 1, &drive->max_failures, NULL); +} + +static void idedisk_setup (ide_drive_t *drive) +{ + struct hd_driveid *id = drive->id; + unsigned long long capacity; + int barrier; + + idedisk_add_settings(drive); + + if (drive->id_read == 0) + return; + + /* + * CompactFlash cards and their brethern look just like hard drives + * to us, but they are removable and don't have a doorlock mechanism. + */ + if (drive->removable && !(drive->is_flash)) { + /* + * Removable disks (eg. SYQUEST); ignore 'WD' drives + */ + if (id->model[0] != 'W' || id->model[1] != 'D') { + drive->doorlocking = 1; + } + } + + (void)set_lba_addressing(drive, 1); + + if (drive->addressing == 1) { + ide_hwif_t *hwif = HWIF(drive); + int max_s = 2048; + + if (max_s > hwif->rqsize) + max_s = hwif->rqsize; + + blk_queue_max_sectors(drive->queue, max_s); + } + + printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name, drive->queue->max_sectors / 2); + + /* calculate drive capacity, and select LBA if possible */ + init_idedisk_capacity (drive); + + /* limit drive capacity to 137GB if LBA48 cannot be used */ + if (drive->addressing == 0 && drive->capacity64 > 1ULL << 28) { + printk(KERN_WARNING "%s: cannot use LBA48 - full capacity " + "%llu sectors (%llu MB)\n", + drive->name, (unsigned long long)drive->capacity64, + sectors_to_MB(drive->capacity64)); + drive->capacity64 = 1ULL << 28; + } + + if (drive->hwif->no_lba48_dma && drive->addressing) { + if (drive->capacity64 > 1ULL << 28) { + printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode will" + " be used for accessing sectors > %u\n", + drive->name, 1 << 28); + } else + drive->addressing = 0; + } + + /* + * if possible, give fdisk access to more of the drive, + * by correcting bios_cyls: + */ + capacity = idedisk_capacity (drive); + if (!drive->forced_geom) { + + if (idedisk_supports_lba48(drive->id)) { + /* compatibility */ + drive->bios_sect = 63; + drive->bios_head = 255; + } + + if (drive->bios_sect && drive->bios_head) { + unsigned int cap0 = capacity; /* truncate to 32 bits */ + unsigned int cylsz, cyl; + + if (cap0 != capacity) + drive->bios_cyl = 65535; + else { + cylsz = drive->bios_sect * drive->bios_head; + cyl = cap0 / cylsz; + if (cyl > 65535) + cyl = 65535; + if (cyl > drive->bios_cyl) + drive->bios_cyl = cyl; + } + } + } + printk(KERN_INFO "%s: %llu sectors (%llu MB)", + drive->name, capacity, sectors_to_MB(capacity)); + + /* Only print cache size when it was specified */ + if (id->buf_size) + printk (" w/%dKiB Cache", id->buf_size/2); + + printk(", CHS=%d/%d/%d", + drive->bios_cyl, drive->bios_head, drive->bios_sect); + if (drive->using_dma) + ide_dma_verbose(drive); + printk("\n"); + + drive->no_io_32bit = id->dword_io ? 1 : 0; + + /* write cache enabled? */ + if ((id->csfo & 1) || (id->cfs_enable_1 & (1 << 5))) + drive->wcache = 1; + + write_cache(drive, 1); + + /* + * We must avoid issuing commands a drive does not understand + * or we may crash it. We check flush cache is supported. We also + * check we have the LBA48 flush cache if the drive capacity is + * too large. By this time we have trimmed the drive capacity if + * LBA48 is not available so we don't need to recheck that. + */ + barrier = 0; + if (ide_id_has_flush_cache(id)) + barrier = 1; + if (drive->addressing == 1) { + /* Can't issue the correct flush ? */ + if (capacity > (1ULL << 28) && !ide_id_has_flush_cache_ext(id)) + barrier = 0; + } + + printk(KERN_INFO "%s: cache flushes %ssupported\n", + drive->name, barrier ? "" : "not "); + if (barrier) { + blk_queue_ordered(drive->queue, QUEUE_ORDERED_FLUSH); + drive->queue->prepare_flush_fn = idedisk_prepare_flush; + drive->queue->end_flush_fn = idedisk_end_flush; + blk_queue_issue_flush_fn(drive->queue, idedisk_issue_flush); + } +} + +static void ide_cacheflush_p(ide_drive_t *drive) +{ + if (!drive->wcache || !ide_id_has_flush_cache(drive->id)) + return; + + if (do_idedisk_flushcache(drive)) + printk(KERN_INFO "%s: wcache flush failed!\n", drive->name); +} + +static int idedisk_cleanup (ide_drive_t *drive) +{ + struct ide_disk_obj *idkp = drive->driver_data; + struct gendisk *g = idkp->disk; + + ide_cacheflush_p(drive); + if (ide_unregister_subdriver(drive)) + return 1; + del_gendisk(g); + + ide_disk_put(idkp); + + return 0; +} + +static void ide_disk_release(struct kref *kref) +{ + struct ide_disk_obj *idkp = to_ide_disk(kref); + ide_drive_t *drive = idkp->drive; + struct gendisk *g = idkp->disk; + + drive->driver_data = NULL; + drive->devfs_name[0] = '\0'; + g->private_data = NULL; + put_disk(g); + kfree(idkp); +} + +static int idedisk_attach(ide_drive_t *drive); + +static void ide_device_shutdown(struct device *dev) +{ + ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); + +#ifdef CONFIG_ALPHA + /* On Alpha, halt(8) doesn't actually turn the machine off, + it puts you into the sort of firmware monitor. Typically, + it's used to boot another kernel image, so it's not much + different from reboot(8). Therefore, we don't need to + spin down the disk in this case, especially since Alpha + firmware doesn't handle disks in standby mode properly. + On the other hand, it's reasonably safe to turn the power + off when the shutdown process reaches the firmware prompt, + as the firmware initialization takes rather long time - + at least 10 seconds, which should be sufficient for + the disk to expire its write cache. */ + if (system_state != SYSTEM_POWER_OFF) { +#else + if (system_state == SYSTEM_RESTART) { +#endif + ide_cacheflush_p(drive); + return; + } + + printk("Shutdown: %s\n", drive->name); + dev->bus->suspend(dev, PMSG_SUSPEND); +} + +/* + * IDE subdriver functions, registered with ide.c + */ +static ide_driver_t idedisk_driver = { + .owner = THIS_MODULE, + .gen_driver = { + .shutdown = ide_device_shutdown, + }, + .name = "ide-disk", + .version = IDEDISK_VERSION, + .media = ide_disk, + .busy = 0, + .supports_dsc_overlap = 0, + .cleanup = idedisk_cleanup, + .do_request = ide_do_rw_disk, + .end_request = ide_end_request, + .error = __ide_error, + .abort = __ide_abort, + .proc = idedisk_proc, + .attach = idedisk_attach, + .drives = LIST_HEAD_INIT(idedisk_driver.drives), +}; + +static int idedisk_open(struct inode *inode, struct file *filp) +{ + struct gendisk *disk = inode->i_bdev->bd_disk; + struct ide_disk_obj *idkp; + ide_drive_t *drive; + + if (!(idkp = ide_disk_get(disk))) + return -ENXIO; + + drive = idkp->drive; + + drive->usage++; + if (drive->removable && drive->usage == 1) { + ide_task_t args; + memset(&args, 0, sizeof(ide_task_t)); + args.tfRegister[IDE_COMMAND_OFFSET] = WIN_DOORLOCK; + args.command_type = IDE_DRIVE_TASK_NO_DATA; + args.handler = &task_no_data_intr; + check_disk_change(inode->i_bdev); + /* + * Ignore the return code from door_lock, + * since the open() has already succeeded, + * and the door_lock is irrelevant at this point. + */ + if (drive->doorlocking && ide_raw_taskfile(drive, &args, NULL)) + drive->doorlocking = 0; + } + return 0; +} + +static int idedisk_release(struct inode *inode, struct file *filp) +{ + struct gendisk *disk = inode->i_bdev->bd_disk; + struct ide_disk_obj *idkp = ide_disk_g(disk); + ide_drive_t *drive = idkp->drive; + + if (drive->usage == 1) + ide_cacheflush_p(drive); + if (drive->removable && drive->usage == 1) { + ide_task_t args; + memset(&args, 0, sizeof(ide_task_t)); + args.tfRegister[IDE_COMMAND_OFFSET] = WIN_DOORUNLOCK; + args.command_type = IDE_DRIVE_TASK_NO_DATA; + args.handler = &task_no_data_intr; + if (drive->doorlocking && ide_raw_taskfile(drive, &args, NULL)) + drive->doorlocking = 0; + } + drive->usage--; + + ide_disk_put(idkp); + + return 0; +} + +static int idedisk_ioctl(struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg) +{ + struct block_device *bdev = inode->i_bdev; + struct ide_disk_obj *idkp = ide_disk_g(bdev->bd_disk); + return generic_ide_ioctl(idkp->drive, file, bdev, cmd, arg); +} + +static int idedisk_media_changed(struct gendisk *disk) +{ + struct ide_disk_obj *idkp = ide_disk_g(disk); + ide_drive_t *drive = idkp->drive; + + /* do not scan partitions twice if this is a removable device */ + if (drive->attach) { + drive->attach = 0; + return 0; + } + /* if removable, always assume it was changed */ + return drive->removable; +} + +static int idedisk_revalidate_disk(struct gendisk *disk) +{ + struct ide_disk_obj *idkp = ide_disk_g(disk); + set_capacity(disk, idedisk_capacity(idkp->drive)); + return 0; +} + +static struct block_device_operations idedisk_ops = { + .owner = THIS_MODULE, + .open = idedisk_open, + .release = idedisk_release, + .ioctl = idedisk_ioctl, + .media_changed = idedisk_media_changed, + .revalidate_disk= idedisk_revalidate_disk +}; + +MODULE_DESCRIPTION("ATA DISK Driver"); + +static int idedisk_attach(ide_drive_t *drive) +{ + struct ide_disk_obj *idkp; + struct gendisk *g; + + /* strstr("foo", "") is non-NULL */ + if (!strstr("ide-disk", drive->driver_req)) + goto failed; + if (!drive->present) + goto failed; + if (drive->media != ide_disk) + goto failed; + + idkp = kmalloc(sizeof(*idkp), GFP_KERNEL); + if (!idkp) + goto failed; + + g = alloc_disk(1 << PARTN_BITS); + if (!g) + goto out_free_idkp; + + ide_init_disk(g, drive); + + if (ide_register_subdriver(drive, &idedisk_driver)) { + printk (KERN_ERR "ide-disk: %s: Failed to register the driver with ide.c\n", drive->name); + goto out_put_disk; + } + + memset(idkp, 0, sizeof(*idkp)); + + kref_init(&idkp->kref); + + idkp->drive = drive; + idkp->driver = &idedisk_driver; + idkp->disk = g; + + g->private_data = &idkp->driver; + + drive->driver_data = idkp; + + DRIVER(drive)->busy++; + idedisk_setup(drive); + if ((!drive->head || drive->head > 16) && !drive->select.b.lba) { + printk(KERN_ERR "%s: INVALID GEOMETRY: %d PHYSICAL HEADS?\n", + drive->name, drive->head); + drive->attach = 0; + } else + drive->attach = 1; + DRIVER(drive)->busy--; + g->minors = 1 << PARTN_BITS; + strcpy(g->devfs_name, drive->devfs_name); + g->driverfs_dev = &drive->gendev; + g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0; + set_capacity(g, idedisk_capacity(drive)); + g->fops = &idedisk_ops; + add_disk(g); + return 0; + +out_put_disk: + put_disk(g); +out_free_idkp: + kfree(idkp); +failed: + return 1; +} + +static void __exit idedisk_exit (void) +{ + ide_unregister_driver(&idedisk_driver); +} + +static int idedisk_init (void) +{ + return ide_register_driver(&idedisk_driver); +} + +module_init(idedisk_init); +module_exit(idedisk_exit); +MODULE_LICENSE("GPL"); |
