mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-11-01 17:08:10 +00:00
Code Issues Releases Wiki Activity
linux-stable/include/linux/ata.h
Alan Cox 0bc2a79a20 libata: Correct IORDY handling 
Debugging a report of a problem with an ancient solid state disk showed
up some problems in the IORDY handling

1.	We check the wrong bit to see if the device has IORDY
2.	Even then some ancient creaking piles of crap don't support
	SETXFER at all.

The cases it fixes are obscure and the risk of side effects is slight
but possible. This also moves us slightly closer to supporting original
MFM/RLL disks with libata.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-10-12 14:55:32 -04:00

472 lines
13 KiB
C
Raw Blame History

/*
* Copyright 2003-2004 Red Hat, Inc. All rights reserved.
* Copyright 2003-2004 Jeff Garzik
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
*
* libata documentation is available via 'make {ps|pdf}docs',
* as Documentation/DocBook/libata.*
*
* Hardware documentation available from http://www.t13.org/
*
*/
#ifndef __LINUX_ATA_H__
#define __LINUX_ATA_H__
#include <linux/types.h>
/* defines only for the constants which don't work well as enums */
#define ATA_DMA_BOUNDARY 0xffffUL
#define ATA_DMA_MASK 0xffffffffULL
enum {
/* various global constants */
ATA_MAX_DEVICES = 2, /* per bus/port */
ATA_MAX_PRD = 256, /* we could make these 256/256 */
ATA_SECT_SIZE = 512,
ATA_MAX_SECTORS_128 = 128,
ATA_MAX_SECTORS = 256,
ATA_MAX_SECTORS_LBA48 = 65535,/* TODO: 65536? */
ATA_ID_WORDS = 256,
ATA_ID_SERNO = 10,
ATA_ID_FW_REV = 23,
ATA_ID_PROD = 27,
ATA_ID_OLD_PIO_MODES = 51,
ATA_ID_FIELD_VALID = 53,
ATA_ID_MWDMA_MODES = 63,
ATA_ID_PIO_MODES = 64,
ATA_ID_EIDE_DMA_MIN = 65,
ATA_ID_EIDE_PIO = 67,
ATA_ID_EIDE_PIO_IORDY = 68,
ATA_ID_UDMA_MODES = 88,
ATA_ID_MAJOR_VER = 80,
ATA_ID_PIO4 = (1 << 1),
ATA_ID_SERNO_LEN = 20,
ATA_ID_FW_REV_LEN = 8,
ATA_ID_PROD_LEN = 40,
ATA_PCI_CTL_OFS = 2,
ATA_PIO0 = (1 << 0),
ATA_PIO1 = ATA_PIO0 | (1 << 1),
ATA_PIO2 = ATA_PIO1 | (1 << 2),
ATA_PIO3 = ATA_PIO2 | (1 << 3),
ATA_PIO4 = ATA_PIO3 | (1 << 4),
ATA_PIO5 = ATA_PIO4 | (1 << 5),
ATA_PIO6 = ATA_PIO5 | (1 << 6),
ATA_SWDMA0 = (1 << 0),
ATA_SWDMA1 = ATA_SWDMA0 | (1 << 1),
ATA_SWDMA2 = ATA_SWDMA1 | (1 << 2),
ATA_SWDMA2_ONLY = (1 << 2),
ATA_MWDMA0 = (1 << 0),
ATA_MWDMA1 = ATA_MWDMA0 | (1 << 1),
ATA_MWDMA2 = ATA_MWDMA1 | (1 << 2),
ATA_MWDMA12_ONLY = (1 << 1) | (1 << 2),
ATA_MWDMA2_ONLY = (1 << 2),
ATA_UDMA0 = (1 << 0),
ATA_UDMA1 = ATA_UDMA0 | (1 << 1),
ATA_UDMA2 = ATA_UDMA1 | (1 << 2),
ATA_UDMA3 = ATA_UDMA2 | (1 << 3),
ATA_UDMA4 = ATA_UDMA3 | (1 << 4),
ATA_UDMA5 = ATA_UDMA4 | (1 << 5),
ATA_UDMA6 = ATA_UDMA5 | (1 << 6),
ATA_UDMA7 = ATA_UDMA6 | (1 << 7),
/* ATA_UDMA7 is just for completeness... doesn't exist (yet?). */
ATA_UDMA_MASK_40C = ATA_UDMA2, /* udma0-2 */
/* DMA-related */
ATA_PRD_SZ = 8,
ATA_PRD_TBL_SZ = (ATA_MAX_PRD * ATA_PRD_SZ),
ATA_PRD_EOT = (1 << 31), /* end-of-table flag */
ATA_DMA_TABLE_OFS = 4,
ATA_DMA_STATUS = 2,
ATA_DMA_CMD = 0,
ATA_DMA_WR = (1 << 3),
ATA_DMA_START = (1 << 0),
ATA_DMA_INTR = (1 << 2),
ATA_DMA_ERR = (1 << 1),
ATA_DMA_ACTIVE = (1 << 0),
/* bits in ATA command block registers */
ATA_HOB = (1 << 7), /* LBA48 selector */
ATA_NIEN = (1 << 1), /* disable-irq flag */
ATA_LBA = (1 << 6), /* LBA28 selector */
ATA_DEV1 = (1 << 4), /* Select Device 1 (slave) */
ATA_DEVICE_OBS = (1 << 7) | (1 << 5), /* obs bits in dev reg */
ATA_DEVCTL_OBS = (1 << 3), /* obsolete bit in devctl reg */
ATA_BUSY = (1 << 7), /* BSY status bit */
ATA_DRDY = (1 << 6), /* device ready */
ATA_DF = (1 << 5), /* device fault */
ATA_DRQ = (1 << 3), /* data request i/o */
ATA_ERR = (1 << 0), /* have an error */
ATA_SRST = (1 << 2), /* software reset */
ATA_ICRC = (1 << 7), /* interface CRC error */
ATA_UNC = (1 << 6), /* uncorrectable media error */
ATA_IDNF = (1 << 4), /* ID not found */
ATA_ABORTED = (1 << 2), /* command aborted */
/* ATA command block registers */
ATA_REG_DATA = 0x00,
ATA_REG_ERR = 0x01,
ATA_REG_NSECT = 0x02,
ATA_REG_LBAL = 0x03,
ATA_REG_LBAM = 0x04,
ATA_REG_LBAH = 0x05,
ATA_REG_DEVICE = 0x06,
ATA_REG_STATUS = 0x07,
ATA_REG_FEATURE = ATA_REG_ERR, /* and their aliases */
ATA_REG_CMD = ATA_REG_STATUS,
ATA_REG_BYTEL = ATA_REG_LBAM,
ATA_REG_BYTEH = ATA_REG_LBAH,
ATA_REG_DEVSEL = ATA_REG_DEVICE,
ATA_REG_IRQ = ATA_REG_NSECT,
/* ATA device commands */
ATA_CMD_DEV_RESET = 0x08, /* ATAPI device reset */
ATA_CMD_CHK_POWER = 0xE5, /* check power mode */
ATA_CMD_STANDBY = 0xE2, /* place in standby power mode */
ATA_CMD_IDLE = 0xE3, /* place in idle power mode */
ATA_CMD_EDD = 0x90, /* execute device diagnostic */
ATA_CMD_FLUSH = 0xE7,
ATA_CMD_FLUSH_EXT = 0xEA,
ATA_CMD_ID_ATA = 0xEC,
ATA_CMD_ID_ATAPI = 0xA1,
ATA_CMD_READ = 0xC8,
ATA_CMD_READ_EXT = 0x25,
ATA_CMD_WRITE = 0xCA,
ATA_CMD_WRITE_EXT = 0x35,
ATA_CMD_WRITE_FUA_EXT = 0x3D,
ATA_CMD_FPDMA_READ = 0x60,
ATA_CMD_FPDMA_WRITE = 0x61,
ATA_CMD_PIO_READ = 0x20,
ATA_CMD_PIO_READ_EXT = 0x24,
ATA_CMD_PIO_WRITE = 0x30,
ATA_CMD_PIO_WRITE_EXT = 0x34,
ATA_CMD_READ_MULTI = 0xC4,
ATA_CMD_READ_MULTI_EXT = 0x29,
ATA_CMD_WRITE_MULTI = 0xC5,
ATA_CMD_WRITE_MULTI_EXT = 0x39,
ATA_CMD_WRITE_MULTI_FUA_EXT = 0xCE,
ATA_CMD_SET_FEATURES = 0xEF,
ATA_CMD_SET_MULTI = 0xC6,
ATA_CMD_PACKET = 0xA0,
ATA_CMD_VERIFY = 0x40,
ATA_CMD_VERIFY_EXT = 0x42,
ATA_CMD_STANDBYNOW1 = 0xE0,
ATA_CMD_IDLEIMMEDIATE = 0xE1,
ATA_CMD_INIT_DEV_PARAMS = 0x91,
ATA_CMD_READ_NATIVE_MAX = 0xF8,
ATA_CMD_READ_NATIVE_MAX_EXT = 0x27,
ATA_CMD_SET_MAX = 0xF9,
ATA_CMD_SET_MAX_EXT = 0x37,
ATA_CMD_READ_LOG_EXT = 0x2f,
ATA_CMD_PMP_READ = 0xE4,
ATA_CMD_PMP_WRITE = 0xE8,
/* READ_LOG_EXT pages */
ATA_LOG_SATA_NCQ = 0x10,
/* READ/WRITE LONG (obsolete) */
ATA_CMD_READ_LONG = 0x22,
ATA_CMD_READ_LONG_ONCE = 0x23,
ATA_CMD_WRITE_LONG = 0x32,
ATA_CMD_WRITE_LONG_ONCE = 0x33,
/* SETFEATURES stuff */
SETFEATURES_XFER = 0x03,
XFER_UDMA_7 = 0x47,
XFER_UDMA_6 = 0x46,
XFER_UDMA_5 = 0x45,
XFER_UDMA_4 = 0x44,
XFER_UDMA_3 = 0x43,
XFER_UDMA_2 = 0x42,
XFER_UDMA_1 = 0x41,
XFER_UDMA_0 = 0x40,
XFER_MW_DMA_4 = 0x24, /* CFA only */
XFER_MW_DMA_3 = 0x23, /* CFA only */
XFER_MW_DMA_2 = 0x22,
XFER_MW_DMA_1 = 0x21,
XFER_MW_DMA_0 = 0x20,
XFER_SW_DMA_2 = 0x12,
XFER_SW_DMA_1 = 0x11,
XFER_SW_DMA_0 = 0x10,
XFER_PIO_6 = 0x0E, /* CFA only */
XFER_PIO_5 = 0x0D, /* CFA only */
XFER_PIO_4 = 0x0C,
XFER_PIO_3 = 0x0B,
XFER_PIO_2 = 0x0A,
XFER_PIO_1 = 0x09,
XFER_PIO_0 = 0x08,
XFER_PIO_SLOW = 0x00,
SETFEATURES_WC_ON = 0x02, /* Enable write cache */
SETFEATURES_WC_OFF = 0x82, /* Disable write cache */
SETFEATURES_SPINUP = 0x07, /* Spin-up drive */
/* ATAPI stuff */
ATAPI_PKT_DMA = (1 << 0),
ATAPI_DMADIR = (1 << 2), /* ATAPI data dir:
0=to device, 1=to host */
ATAPI_CDB_LEN = 16,
/* PMP stuff */
SATA_PMP_MAX_PORTS = 15,
SATA_PMP_CTRL_PORT = 15,
SATA_PMP_GSCR_DWORDS = 128,
SATA_PMP_GSCR_PROD_ID = 0,
SATA_PMP_GSCR_REV = 1,
SATA_PMP_GSCR_PORT_INFO = 2,
SATA_PMP_GSCR_ERROR = 32,
SATA_PMP_GSCR_ERROR_EN = 33,
SATA_PMP_GSCR_FEAT = 64,
SATA_PMP_GSCR_FEAT_EN = 96,
SATA_PMP_PSCR_STATUS = 0,
SATA_PMP_PSCR_ERROR = 1,
SATA_PMP_PSCR_CONTROL = 2,
SATA_PMP_FEAT_BIST = (1 << 0),
SATA_PMP_FEAT_PMREQ = (1 << 1),
SATA_PMP_FEAT_DYNSSC = (1 << 2),
SATA_PMP_FEAT_NOTIFY = (1 << 3),
/* cable types */
ATA_CBL_NONE = 0,
ATA_CBL_PATA40 = 1,
ATA_CBL_PATA80 = 2,
ATA_CBL_PATA40_SHORT = 3, /* 40 wire cable to high UDMA spec */
ATA_CBL_PATA_UNK = 4,
ATA_CBL_SATA = 5,
/* SATA Status and Control Registers */
SCR_STATUS = 0,
SCR_ERROR = 1,
SCR_CONTROL = 2,
SCR_ACTIVE = 3,
SCR_NOTIFICATION = 4,
/* SError bits */
SERR_DATA_RECOVERED = (1 << 0), /* recovered data error */
SERR_COMM_RECOVERED = (1 << 1), /* recovered comm failure */
SERR_DATA = (1 << 8), /* unrecovered data error */
SERR_PERSISTENT = (1 << 9), /* persistent data/comm error */
SERR_PROTOCOL = (1 << 10), /* protocol violation */
SERR_INTERNAL = (1 << 11), /* host internal error */
SERR_PHYRDY_CHG = (1 << 16), /* PHY RDY changed */
SERR_DEV_XCHG = (1 << 26), /* device exchanged */
/* struct ata_taskfile flags */
ATA_TFLAG_LBA48 = (1 << 0), /* enable 48-bit LBA and "HOB" */
ATA_TFLAG_ISADDR = (1 << 1), /* enable r/w to nsect/lba regs */
ATA_TFLAG_DEVICE = (1 << 2), /* enable r/w to device reg */
ATA_TFLAG_WRITE = (1 << 3), /* data dir: host->dev==1 (write) */
ATA_TFLAG_LBA = (1 << 4), /* enable LBA */
ATA_TFLAG_FUA = (1 << 5), /* enable FUA */
ATA_TFLAG_POLLING = (1 << 6), /* set nIEN to 1 and use polling */
};
enum ata_tf_protocols {
/* ATA taskfile protocols */
ATA_PROT_UNKNOWN, /* unknown/invalid */
ATA_PROT_NODATA, /* no data */
ATA_PROT_PIO, /* PIO data xfer */
ATA_PROT_DMA, /* DMA */
ATA_PROT_NCQ, /* NCQ */
ATA_PROT_ATAPI, /* packet command, PIO data xfer*/
ATA_PROT_ATAPI_NODATA, /* packet command, no data */
ATA_PROT_ATAPI_DMA, /* packet command with special DMA sauce */
};
enum ata_ioctls {
ATA_IOC_GET_IO32 = 0x309,
ATA_IOC_SET_IO32 = 0x324,
};
/* core structures */
struct ata_prd {
u32 addr;
u32 flags_len;
};
struct ata_taskfile {
unsigned long flags; /* ATA_TFLAG_xxx */
u8 protocol; /* ATA_PROT_xxx */
u8 ctl; /* control reg */
u8 hob_feature; /* additional data */
u8 hob_nsect; /* to support LBA48 */
u8 hob_lbal;
u8 hob_lbam;
u8 hob_lbah;
u8 feature;
u8 nsect;
u8 lbal;
u8 lbam;
u8 lbah;
u8 device;
u8 command; /* IO operation */
};
#define ata_id_is_ata(id) (((id)[0] & (1 << 15)) == 0)
#define ata_id_rahead_enabled(id) ((id)[85] & (1 << 6))
#define ata_id_wcache_enabled(id) ((id)[85] & (1 << 5))
#define ata_id_hpa_enabled(id) ((id)[85] & (1 << 10))
#define ata_id_has_fua(id) ((id)[84] & (1 << 6))
#define ata_id_has_flush(id) ((id)[83] & (1 << 12))
#define ata_id_has_flush_ext(id) ((id)[83] & (1 << 13))
#define ata_id_has_lba48(id) ((id)[83] & (1 << 10))
#define ata_id_has_hpa(id) ((id)[82] & (1 << 10))
#define ata_id_has_wcache(id) ((id)[82] & (1 << 5))
#define ata_id_has_pm(id) ((id)[82] & (1 << 3))
#define ata_id_has_lba(id) ((id)[49] & (1 << 9))
#define ata_id_has_dma(id) ((id)[49] & (1 << 8))
#define ata_id_has_ncq(id) ((id)[76] & (1 << 8))
#define ata_id_queue_depth(id) (((id)[75] & 0x1f) + 1)
#define ata_id_removeable(id) ((id)[0] & (1 << 7))
#define ata_id_has_dword_io(id) ((id)[50] & (1 << 0))
#define ata_id_iordy_disable(id) ((id)[49] & (1 << 10))
#define ata_id_has_iordy(id) ((id)[49] & (1 << 11))
#define ata_id_u32(id,n) \
(((u32) (id)[(n) + 1] << 16) | ((u32) (id)[(n)]))
#define ata_id_u64(id,n) \
( ((u64) (id)[(n) + 3] << 48) | \
((u64) (id)[(n) + 2] << 32) | \
((u64) (id)[(n) + 1] << 16) | \
((u64) (id)[(n) + 0]) )
#define ata_id_cdb_intr(id) (((id)[0] & 0x60) == 0x20)
static inline unsigned int ata_id_major_version(const u16 *id)
{
unsigned int mver;
if (id[ATA_ID_MAJOR_VER] == 0xFFFF)
return 0;
for (mver = 14; mver >= 1; mver--)
if (id[ATA_ID_MAJOR_VER] & (1 << mver))
break;
return mver;
}
static inline int ata_id_is_sata(const u16 *id)
{
return ata_id_major_version(id) >= 5 && id[93] == 0;
}
static inline int ata_id_current_chs_valid(const u16 *id)
{
/* For ATA-1 devices, if the INITIALIZE DEVICE PARAMETERS command
has not been issued to the device then the values of
id[54] to id[56] are vendor specific. */
return (id[53] & 0x01) && /* Current translation valid */
id[54] && /* cylinders in current translation */
id[55] && /* heads in current translation */
id[55] <= 16 &&
id[56]; /* sectors in current translation */
}
static inline int ata_id_is_cfa(const u16 *id)
{
u16 v = id[0];
if (v == 0x848A) /* Standard CF */
return 1;
/* Could be CF hiding as standard ATA */
if (ata_id_major_version(id) >= 3 && id[82] != 0xFFFF &&
(id[82] & ( 1 << 2)))
return 1;
return 0;
}
static inline int ata_drive_40wire(const u16 *dev_id)
{
if (ata_id_is_sata(dev_id))
return 0; /* SATA */
if ((dev_id[93] & 0xE000) == 0x6000)
return 0; /* 80 wire */
return 1;
}
static inline int atapi_cdb_len(const u16 *dev_id)
{
u16 tmp = dev_id[0] & 0x3;
switch (tmp) {
case 0: return 12;
case 1: return 16;
default: return -1;
}
}
static inline int is_atapi_taskfile(const struct ata_taskfile *tf)
{
return (tf->protocol == ATA_PROT_ATAPI) ||
(tf->protocol == ATA_PROT_ATAPI_NODATA) ||
(tf->protocol == ATA_PROT_ATAPI_DMA);
}
static inline int is_multi_taskfile(struct ata_taskfile *tf)
{
return (tf->command == ATA_CMD_READ_MULTI) ||
(tf->command == ATA_CMD_WRITE_MULTI) ||
(tf->command == ATA_CMD_READ_MULTI_EXT) ||
(tf->command == ATA_CMD_WRITE_MULTI_EXT) ||
(tf->command == ATA_CMD_WRITE_MULTI_FUA_EXT);
}
static inline int ata_ok(u8 status)
{
return ((status & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | ATA_ERR))
== ATA_DRDY);
}
static inline int lba_28_ok(u64 block, u32 n_block)
{
/* check the ending block number */
return ((block + n_block - 1) < ((u64)1 << 28)) && (n_block <= 256);
}
static inline int lba_48_ok(u64 block, u32 n_block)
{
/* check the ending block number */
return ((block + n_block - 1) < ((u64)1 << 48)) && (n_block <= 65536);
}
#define sata_pmp_gscr_vendor(gscr) ((gscr)[SATA_PMP_GSCR_PROD_ID] & 0xffff)
#define sata_pmp_gscr_devid(gscr) ((gscr)[SATA_PMP_GSCR_PROD_ID] >> 16)
#define sata_pmp_gscr_rev(gscr) (((gscr)[SATA_PMP_GSCR_REV] >> 8) & 0xff)
#define sata_pmp_gscr_ports(gscr) ((gscr)[SATA_PMP_GSCR_PORT_INFO] & 0xf)
#endif /* __LINUX_ATA_H__ */
Reference in a new issue View git blame Copy permalink