| /* |
| * libata-core.c - helper library for ATA |
| * |
| * Maintained by: Jeff Garzik <jgarzik@pobox.com> |
| * Please ALWAYS copy linux-ide@vger.kernel.org |
| * on emails. |
| * |
| * 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/ and |
| * http://www.sata-io.org/ |
| * |
| * Standards documents from: |
| * http://www.t13.org (ATA standards, PCI DMA IDE spec) |
| * http://www.t10.org (SCSI MMC - for ATAPI MMC) |
| * http://www.sata-io.org (SATA) |
| * http://www.compactflash.org (CF) |
| * http://www.qic.org (QIC157 - Tape and DSC) |
| * http://www.ce-ata.org (CE-ATA: not supported) |
| * |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/pci.h> |
| #include <linux/init.h> |
| #include <linux/list.h> |
| #include <linux/mm.h> |
| #include <linux/spinlock.h> |
| #include <linux/blkdev.h> |
| #include <linux/delay.h> |
| #include <linux/timer.h> |
| #include <linux/interrupt.h> |
| #include <linux/completion.h> |
| #include <linux/suspend.h> |
| #include <linux/workqueue.h> |
| #include <linux/jiffies.h> |
| #include <linux/scatterlist.h> |
| #include <linux/io.h> |
| #include <scsi/scsi.h> |
| #include <scsi/scsi_cmnd.h> |
| #include <scsi/scsi_host.h> |
| #include <linux/libata.h> |
| #include <asm/semaphore.h> |
| #include <asm/byteorder.h> |
| #include <linux/cdrom.h> |
| |
| #include "libata.h" |
| |
| |
| /* debounce timing parameters in msecs { interval, duration, timeout } */ |
| const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 }; |
| const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 }; |
| const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 }; |
| |
| const struct ata_port_operations ata_base_port_ops = { |
| .irq_clear = ata_noop_irq_clear, |
| .prereset = ata_std_prereset, |
| .hardreset = sata_std_hardreset, |
| .postreset = ata_std_postreset, |
| .error_handler = ata_std_error_handler, |
| }; |
| |
| const struct ata_port_operations sata_port_ops = { |
| .inherits = &ata_base_port_ops, |
| |
| .qc_defer = ata_std_qc_defer, |
| .dev_select = ata_noop_dev_select, |
| }; |
| |
| const struct ata_port_operations sata_pmp_port_ops = { |
| .inherits = &sata_port_ops, |
| |
| .pmp_prereset = sata_pmp_std_prereset, |
| .pmp_hardreset = sata_pmp_std_hardreset, |
| .pmp_postreset = sata_pmp_std_postreset, |
| .error_handler = sata_pmp_error_handler, |
| }; |
| |
| static unsigned int ata_dev_init_params(struct ata_device *dev, |
| u16 heads, u16 sectors); |
| static unsigned int ata_dev_set_xfermode(struct ata_device *dev); |
| static unsigned int ata_dev_set_feature(struct ata_device *dev, |
| u8 enable, u8 feature); |
| static void ata_dev_xfermask(struct ata_device *dev); |
| static unsigned long ata_dev_blacklisted(const struct ata_device *dev); |
| |
| unsigned int ata_print_id = 1; |
| static struct workqueue_struct *ata_wq; |
| |
| struct workqueue_struct *ata_aux_wq; |
| |
| struct ata_force_param { |
| const char *name; |
| unsigned int cbl; |
| int spd_limit; |
| unsigned long xfer_mask; |
| unsigned int horkage_on; |
| unsigned int horkage_off; |
| }; |
| |
| struct ata_force_ent { |
| int port; |
| int device; |
| struct ata_force_param param; |
| }; |
| |
| static struct ata_force_ent *ata_force_tbl; |
| static int ata_force_tbl_size; |
| |
| static char ata_force_param_buf[PAGE_SIZE] __initdata; |
| /* param_buf is thrown away after initialization, disallow read */ |
| module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0); |
| MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)"); |
| |
| int atapi_enabled = 1; |
| module_param(atapi_enabled, int, 0444); |
| MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)"); |
| |
| static int atapi_dmadir = 0; |
| module_param(atapi_dmadir, int, 0444); |
| MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)"); |
| |
| int atapi_passthru16 = 1; |
| module_param(atapi_passthru16, int, 0444); |
| MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)"); |
| |
| int libata_fua = 0; |
| module_param_named(fua, libata_fua, int, 0444); |
| MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)"); |
| |
| static int ata_ignore_hpa; |
| module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644); |
| MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)"); |
| |
| static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA; |
| module_param_named(dma, libata_dma_mask, int, 0444); |
| MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)"); |
| |
| static int ata_probe_timeout = ATA_TMOUT_INTERNAL / HZ; |
| module_param(ata_probe_timeout, int, 0444); |
| MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)"); |
| |
| int libata_noacpi = 0; |
| module_param_named(noacpi, libata_noacpi, int, 0444); |
| MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in probe/suspend/resume when set"); |
| |
| int libata_allow_tpm = 0; |
| module_param_named(allow_tpm, libata_allow_tpm, int, 0444); |
| MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands"); |
| |
| MODULE_AUTHOR("Jeff Garzik"); |
| MODULE_DESCRIPTION("Library module for ATA devices"); |
| MODULE_LICENSE("GPL"); |
| MODULE_VERSION(DRV_VERSION); |
| |
| |
| /** |
| * ata_force_cbl - force cable type according to libata.force |
| * @ap: ATA port of interest |
| * |
| * Force cable type according to libata.force and whine about it. |
| * The last entry which has matching port number is used, so it |
| * can be specified as part of device force parameters. For |
| * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the |
| * same effect. |
| * |
| * LOCKING: |
| * EH context. |
| */ |
| void ata_force_cbl(struct ata_port *ap) |
| { |
| int i; |
| |
| for (i = ata_force_tbl_size - 1; i >= 0; i--) { |
| const struct ata_force_ent *fe = &ata_force_tbl[i]; |
| |
| if (fe->port != -1 && fe->port != ap->print_id) |
| continue; |
| |
| if (fe->param.cbl == ATA_CBL_NONE) |
| continue; |
| |
| ap->cbl = fe->param.cbl; |
| ata_port_printk(ap, KERN_NOTICE, |
| "FORCE: cable set to %s\n", fe->param.name); |
| return; |
| } |
| } |
| |
| /** |
| * ata_force_spd_limit - force SATA spd limit according to libata.force |
| * @link: ATA link of interest |
| * |
| * Force SATA spd limit according to libata.force and whine about |
| * it. When only the port part is specified (e.g. 1:), the limit |
| * applies to all links connected to both the host link and all |
| * fan-out ports connected via PMP. If the device part is |
| * specified as 0 (e.g. 1.00:), it specifies the first fan-out |
| * link not the host link. Device number 15 always points to the |
| * host link whether PMP is attached or not. |
| * |
| * LOCKING: |
| * EH context. |
| */ |
| static void ata_force_spd_limit(struct ata_link *link) |
| { |
| int linkno, i; |
| |
| if (ata_is_host_link(link)) |
| linkno = 15; |
| else |
| linkno = link->pmp; |
| |
| for (i = ata_force_tbl_size - 1; i >= 0; i--) { |
| const struct ata_force_ent *fe = &ata_force_tbl[i]; |
| |
| if (fe->port != -1 && fe->port != link->ap->print_id) |
| continue; |
| |
| if (fe->device != -1 && fe->device != linkno) |
| continue; |
| |
| if (!fe->param.spd_limit) |
| continue; |
| |
| link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1; |
| ata_link_printk(link, KERN_NOTICE, |
| "FORCE: PHY spd limit set to %s\n", fe->param.name); |
| return; |
| } |
| } |
| |
| /** |
| * ata_force_xfermask - force xfermask according to libata.force |
| * @dev: ATA device of interest |
| * |
| * Force xfer_mask according to libata.force and whine about it. |
| * For consistency with link selection, device number 15 selects |
| * the first device connected to the host link. |
| * |
| * LOCKING: |
| * EH context. |
| */ |
| static void ata_force_xfermask(struct ata_device *dev) |
| { |
| int devno = dev->link->pmp + dev->devno; |
| int alt_devno = devno; |
| int i; |
| |
| /* allow n.15 for the first device attached to host port */ |
| if (ata_is_host_link(dev->link) && devno == 0) |
| alt_devno = 15; |
| |
| for (i = ata_force_tbl_size - 1; i >= 0; i--) { |
| const struct ata_force_ent *fe = &ata_force_tbl[i]; |
| unsigned long pio_mask, mwdma_mask, udma_mask; |
| |
| if (fe->port != -1 && fe->port != dev->link->ap->print_id) |
| continue; |
| |
| if (fe->device != -1 && fe->device != devno && |
| fe->device != alt_devno) |
| continue; |
| |
| if (!fe->param.xfer_mask) |
| continue; |
| |
| ata_unpack_xfermask(fe->param.xfer_mask, |
| &pio_mask, &mwdma_mask, &udma_mask); |
| if (udma_mask) |
| dev->udma_mask = udma_mask; |
| else if (mwdma_mask) { |
| dev->udma_mask = 0; |
| dev->mwdma_mask = mwdma_mask; |
| } else { |
| dev->udma_mask = 0; |
| dev->mwdma_mask = 0; |
| dev->pio_mask = pio_mask; |
| } |
| |
| ata_dev_printk(dev, KERN_NOTICE, |
| "FORCE: xfer_mask set to %s\n", fe->param.name); |
| return; |
| } |
| } |
| |
| /** |
| * ata_force_horkage - force horkage according to libata.force |
| * @dev: ATA device of interest |
| * |
| * Force horkage according to libata.force and whine about it. |
| * For consistency with link selection, device number 15 selects |
| * the first device connected to the host link. |
| * |
| * LOCKING: |
| * EH context. |
| */ |
| static void ata_force_horkage(struct ata_device *dev) |
| { |
| int devno = dev->link->pmp + dev->devno; |
| int alt_devno = devno; |
| int i; |
| |
| /* allow n.15 for the first device attached to host port */ |
| if (ata_is_host_link(dev->link) && devno == 0) |
| alt_devno = 15; |
| |
| for (i = 0; i < ata_force_tbl_size; i++) { |
| const struct ata_force_ent *fe = &ata_force_tbl[i]; |
| |
| if (fe->port != -1 && fe->port != dev->link->ap->print_id) |
| continue; |
| |
| if (fe->device != -1 && fe->device != devno && |
| fe->device != alt_devno) |
| continue; |
| |
| if (!(~dev->horkage & fe->param.horkage_on) && |
| !(dev->horkage & fe->param.horkage_off)) |
| continue; |
| |
| dev->horkage |= fe->param.horkage_on; |
| dev->horkage &= ~fe->param.horkage_off; |
| |
| ata_dev_printk(dev, KERN_NOTICE, |
| "FORCE: horkage modified (%s)\n", fe->param.name); |
| } |
| } |
| |
| /** |
| * atapi_cmd_type - Determine ATAPI command type from SCSI opcode |
| * @opcode: SCSI opcode |
| * |
| * Determine ATAPI command type from @opcode. |
| * |
| * LOCKING: |
| * None. |
| * |
| * RETURNS: |
| * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC} |
| */ |
| int atapi_cmd_type(u8 opcode) |
| { |
| switch (opcode) { |
| case GPCMD_READ_10: |
| case GPCMD_READ_12: |
| return ATAPI_READ; |
| |
| case GPCMD_WRITE_10: |
| case GPCMD_WRITE_12: |
| case GPCMD_WRITE_AND_VERIFY_10: |
| return ATAPI_WRITE; |
| |
| case GPCMD_READ_CD: |
| case GPCMD_READ_CD_MSF: |
| return ATAPI_READ_CD; |
| |
| case ATA_16: |
| case ATA_12: |
| if (atapi_passthru16) |
| return ATAPI_PASS_THRU; |
| /* fall thru */ |
| default: |
| return ATAPI_MISC; |
| } |
| } |
| |
| /** |
| * ata_noop_irq_clear - Noop placeholder for irq_clear |
| * @ap: Port associated with this ATA transaction. |
| */ |
| void ata_noop_irq_clear(struct ata_port *ap) |
| { |
| } |
| |
| /** |
| * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure |
| * @tf: Taskfile to convert |
| * @pmp: Port multiplier port |
| * @is_cmd: This FIS is for command |
| * @fis: Buffer into which data will output |
| * |
| * Converts a standard ATA taskfile to a Serial ATA |
| * FIS structure (Register - Host to Device). |
| * |
| * LOCKING: |
| * Inherited from caller. |
| */ |
| void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis) |
| { |
| fis[0] = 0x27; /* Register - Host to Device FIS */ |
| fis[1] = pmp & 0xf; /* Port multiplier number*/ |
| if (is_cmd) |
| fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */ |
| |
| fis[2] = tf->command; |
| fis[3] = tf->feature; |
| |
| fis[4] = tf->lbal; |
| fis[5] = tf->lbam; |
| fis[6] = tf->lbah; |
| fis[7] = tf->device; |
| |
| fis[8] = tf->hob_lbal; |
| fis[9] = tf->hob_lbam; |
| fis[10] = tf->hob_lbah; |
| fis[11] = tf->hob_feature; |
| |
| fis[12] = tf->nsect; |
| fis[13] = tf->hob_nsect; |
| fis[14] = 0; |
| fis[15] = tf->ctl; |
| |
| fis[16] = 0; |
| fis[17] = 0; |
| fis[18] = 0; |
| fis[19] = 0; |
| } |
| |
| /** |
| * ata_tf_from_fis - Convert SATA FIS to ATA taskfile |
| * @fis: Buffer from which data will be input |
| * @tf: Taskfile to output |
| * |
| * Converts a serial ATA FIS structure to a standard ATA taskfile. |
| * |
| * LOCKING: |
| * Inherited from caller. |
| */ |
| |
| void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf) |
| { |
| tf->command = fis[2]; /* status */ |
| tf->feature = fis[3]; /* error */ |
| |
| tf->lbal = fis[4]; |
| tf->lbam = fis[5]; |
| tf->lbah = fis[6]; |
| tf->device = fis[7]; |
| |
| tf->hob_lbal = fis[8]; |
| tf->hob_lbam = fis[9]; |
| tf->hob_lbah = fis[10]; |
| |
| tf->nsect = fis[12]; |
| tf->hob_nsect = fis[13]; |
| } |
| |
| static const u8 ata_rw_cmds[] = { |
| /* pio multi */ |
| ATA_CMD_READ_MULTI, |
| ATA_CMD_WRITE_MULTI, |
| ATA_CMD_READ_MULTI_EXT, |
| ATA_CMD_WRITE_MULTI_EXT, |
| 0, |
| 0, |
| 0, |
| ATA_CMD_WRITE_MULTI_FUA_EXT, |
| /* pio */ |
| ATA_CMD_PIO_READ, |
| ATA_CMD_PIO_WRITE, |
| ATA_CMD_PIO_READ_EXT, |
| ATA_CMD_PIO_WRITE_EXT, |
| 0, |
| 0, |
| 0, |
| 0, |
| /* dma */ |
| ATA_CMD_READ, |
| ATA_CMD_WRITE, |
| ATA_CMD_READ_EXT, |
| ATA_CMD_WRITE_EXT, |
| 0, |
| 0, |
| 0, |
| ATA_CMD_WRITE_FUA_EXT |
| }; |
| |
| /** |
| * ata_rwcmd_protocol - set taskfile r/w commands and protocol |
| * @tf: command to examine and configure |
| * @dev: device tf belongs to |
| * |
| * Examine the device configuration and tf->flags to calculate |
| * the proper read/write commands and protocol to use. |
| * |
| * LOCKING: |
| * caller. |
| */ |
| static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev) |
| { |
| u8 cmd; |
| |
| int index, fua, lba48, write; |
| |
| fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0; |
| lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0; |
| write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0; |
| |
| if (dev->flags & ATA_DFLAG_PIO) { |
| tf->protocol = ATA_PROT_PIO; |
| index = dev->multi_count ? 0 : 8; |
| } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) { |
| /* Unable to use DMA due to host limitation */ |
| tf->protocol = ATA_PROT_PIO; |
| index = dev->multi_count ? 0 : 8; |
| } else { |
| tf->protocol = ATA_PROT_DMA; |
| index = 16; |
| } |
| |
| cmd = ata_rw_cmds[index + fua + lba48 + write]; |
| if (cmd) { |
| tf->command = cmd; |
| return 0; |
| } |
| return -1; |
| } |
| |
| /** |
| * ata_tf_read_block - Read block address from ATA taskfile |
| * @tf: ATA taskfile of interest |
| * @dev: ATA device @tf belongs to |
| * |
| * LOCKING: |
| * None. |
| * |
| * Read block address from @tf. This function can handle all |
| * three address formats - LBA, LBA48 and CHS. tf->protocol and |
| * flags select the address format to use. |
| * |
| * RETURNS: |
| * Block address read from @tf. |
| */ |
| u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev) |
| { |
| u64 block = 0; |
| |
| if (tf->flags & ATA_TFLAG_LBA) { |
| if (tf->flags & ATA_TFLAG_LBA48) { |
| block |= (u64)tf->hob_lbah << 40; |
| block |= (u64)tf->hob_lbam << 32; |
| block |= tf->hob_lbal << 24; |
| } else |
| block |= (tf->device & 0xf) << 24; |
| |
| block |= tf->lbah << 16; |
| block |= tf->lbam << 8; |
| block |= tf->lbal; |
| } else { |
| u32 cyl, head, sect; |
| |
| cyl = tf->lbam | (tf->lbah << 8); |
| head = tf->device & 0xf; |
| sect = tf->lbal; |
| |
| block = (cyl * dev->heads + head) * dev->sectors + sect; |
| } |
| |
| return block; |
| } |
| |
| /** |
| * ata_build_rw_tf - Build ATA taskfile for given read/write request |
| * @tf: Target ATA taskfile |
| * @dev: ATA device @tf belongs to |
| * @block: Block address |
| * @n_block: Number of blocks |
| * @tf_flags: RW/FUA etc... |
| * @tag: tag |
| * |
| * LOCKING: |
| * None. |
| * |
| * Build ATA taskfile @tf for read/write request described by |
| * @block, @n_block, @tf_flags and @tag on @dev. |
| * |
| * RETURNS: |
| * |
| * 0 on success, -ERANGE if the request is too large for @dev, |
| * -EINVAL if the request is invalid. |
| */ |
| int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, |
| u64 block, u32 n_block, unsigned int tf_flags, |
| unsigned int tag) |
| { |
| tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| tf->flags |= tf_flags; |
| |
| if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) { |
| /* yay, NCQ */ |
| if (!lba_48_ok(block, n_block)) |
| return -ERANGE; |
| |
| tf->protocol = ATA_PROT_NCQ; |
| tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48; |
| |
| if (tf->flags & ATA_TFLAG_WRITE) |
| tf->command = ATA_CMD_FPDMA_WRITE; |
| else |
| tf->command = ATA_CMD_FPDMA_READ; |
| |
| tf->nsect = tag << 3; |
| tf->hob_feature = (n_block >> 8) & 0xff; |
| tf->feature = n_block & 0xff; |
| |
| tf->hob_lbah = (block >> 40) & 0xff; |
| tf->hob_lbam = (block >> 32) & 0xff; |
| tf->hob_lbal = (block >> 24) & 0xff; |
| tf->lbah = (block >> 16) & 0xff; |
| tf->lbam = (block >> 8) & 0xff; |
| tf->lbal = block & 0xff; |
| |
| tf->device = 1 << 6; |
| if (tf->flags & ATA_TFLAG_FUA) |
| tf->device |= 1 << 7; |
| } else if (dev->flags & ATA_DFLAG_LBA) { |
| tf->flags |= ATA_TFLAG_LBA; |
| |
| if (lba_28_ok(block, n_block)) { |
| /* use LBA28 */ |
| tf->device |= (block >> 24) & 0xf; |
| } else if (lba_48_ok(block, n_block)) { |
| if (!(dev->flags & ATA_DFLAG_LBA48)) |
| return -ERANGE; |
| |
| /* use LBA48 */ |
| tf->flags |= ATA_TFLAG_LBA48; |
| |
| tf->hob_nsect = (n_block >> 8) & 0xff; |
| |
| tf->hob_lbah = (block >> 40) & 0xff; |
| tf->hob_lbam = (block >> 32) & 0xff; |
| tf->hob_lbal = (block >> 24) & 0xff; |
| } else |
| /* request too large even for LBA48 */ |
| return -ERANGE; |
| |
| if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) |
| return -EINVAL; |
| |
| tf->nsect = n_block & 0xff; |
| |
| tf->lbah = (block >> 16) & 0xff; |
| tf->lbam = (block >> 8) & 0xff; |
| tf->lbal = block & 0xff; |
| |
| tf->device |= ATA_LBA; |
| } else { |
| /* CHS */ |
| u32 sect, head, cyl, track; |
| |
| /* The request -may- be too large for CHS addressing. */ |
| if (!lba_28_ok(block, n_block)) |
| return -ERANGE; |
| |
| if (unlikely(ata_rwcmd_protocol(tf, dev) < 0)) |
| return -EINVAL; |
| |
| /* Convert LBA to CHS */ |
| track = (u32)block / dev->sectors; |
| cyl = track / dev->heads; |
| head = track % dev->heads; |
| sect = (u32)block % dev->sectors + 1; |
| |
| DPRINTK("block %u track %u cyl %u head %u sect %u\n", |
| (u32)block, track, cyl, head, sect); |
| |
| /* Check whether the converted CHS can fit. |
| Cylinder: 0-65535 |
| Head: 0-15 |
| Sector: 1-255*/ |
| if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect)) |
| return -ERANGE; |
| |
| tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */ |
| tf->lbal = sect; |
| tf->lbam = cyl; |
| tf->lbah = cyl >> 8; |
| tf->device |= head; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask |
| * @pio_mask: pio_mask |
| * @mwdma_mask: mwdma_mask |
| * @udma_mask: udma_mask |
| * |
| * Pack @pio_mask, @mwdma_mask and @udma_mask into a single |
| * unsigned int xfer_mask. |
| * |
| * LOCKING: |
| * None. |
| * |
| * RETURNS: |
| * Packed xfer_mask. |
| */ |
| unsigned long ata_pack_xfermask(unsigned long pio_mask, |
| unsigned long mwdma_mask, |
| unsigned long udma_mask) |
| { |
| return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) | |
| ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) | |
| ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA); |
| } |
| |
| /** |
| * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks |
| * @xfer_mask: xfer_mask to unpack |
| * @pio_mask: resulting pio_mask |
| * @mwdma_mask: resulting mwdma_mask |
| * @udma_mask: resulting udma_mask |
| * |
| * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask. |
| * Any NULL distination masks will be ignored. |
| */ |
| void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask, |
| unsigned long *mwdma_mask, unsigned long *udma_mask) |
| { |
| if (pio_mask) |
| *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO; |
| if (mwdma_mask) |
| *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA; |
| if (udma_mask) |
| *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA; |
| } |
| |
| static const struct ata_xfer_ent { |
| int shift, bits; |
| u8 base; |
| } ata_xfer_tbl[] = { |
| { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 }, |
| { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 }, |
| { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 }, |
| { -1, }, |
| }; |
| |
| /** |
| * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask |
| * @xfer_mask: xfer_mask of interest |
| * |
| * Return matching XFER_* value for @xfer_mask. Only the highest |
| * bit of @xfer_mask is considered. |
| * |
| * LOCKING: |
| * None. |
| * |
| * RETURNS: |
| * Matching XFER_* value, 0xff if no match found. |
| */ |
| u8 ata_xfer_mask2mode(unsigned long xfer_mask) |
| { |
| int highbit = fls(xfer_mask) - 1; |
| const struct ata_xfer_ent *ent; |
| |
| for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) |
| if (highbit >= ent->shift && highbit < ent->shift + ent->bits) |
| return ent->base + highbit - ent->shift; |
| return 0xff; |
| } |
| |
| /** |
| * ata_xfer_mode2mask - Find matching xfer_mask for XFER_* |
| * @xfer_mode: XFER_* of interest |
| * |
| * Return matching xfer_mask for @xfer_mode. |
| * |
| * LOCKING: |
| * None. |
| * |
| * RETURNS: |
| * Matching xfer_mask, 0 if no match found. |
| */ |
| unsigned long ata_xfer_mode2mask(u8 xfer_mode) |
| { |
| const struct ata_xfer_ent *ent; |
| |
| for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) |
| if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) |
| return ((2 << (ent->shift + xfer_mode - ent->base)) - 1) |
| & ~((1 << ent->shift) - 1); |
| return 0; |
| } |
| |
| /** |
| * ata_xfer_mode2shift - Find matching xfer_shift for XFER_* |
| * @xfer_mode: XFER_* of interest |
| * |
| * Return matching xfer_shift for @xfer_mode. |
| * |
| * LOCKING: |
| * None. |
| * |
| * RETURNS: |
| * Matching xfer_shift, -1 if no match found. |
| */ |
| int ata_xfer_mode2shift(unsigned long xfer_mode) |
| { |
| const struct ata_xfer_ent *ent; |
| |
| for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) |
| if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits) |
| return ent->shift; |
| return -1; |
| } |
| |
| /** |
| * ata_mode_string - convert xfer_mask to string |
| * @xfer_mask: mask of bits supported; only highest bit counts. |
| * |
| * Determine string which represents the highest speed |
| * (highest bit in @modemask). |
| * |
| * LOCKING: |
| * None. |
| * |
| * RETURNS: |
| * Constant C string representing highest speed listed in |
| * @mode_mask, or the constant C string "<n/a>". |
| */ |
| const char *ata_mode_string(unsigned long xfer_mask) |
| { |
| static const char * const xfer_mode_str[] = { |
| "PIO0", |
| "PIO1", |
| "PIO2", |
| "PIO3", |
| "PIO4", |
| "PIO5", |
| "PIO6", |
| "MWDMA0", |
| "MWDMA1", |
| "MWDMA2", |
| "MWDMA3", |
| "MWDMA4", |
| "UDMA/16", |
| "UDMA/25", |
| "UDMA/33", |
| "UDMA/44", |
| "UDMA/66", |
| "UDMA/100", |
| "UDMA/133", |
| "UDMA7", |
| }; |
| int highbit; |
| |
| highbit = fls(xfer_mask) - 1; |
| if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str)) |
| return xfer_mode_str[highbit]; |
| return "<n/a>"; |
| } |
| |
| static const char *sata_spd_string(unsigned int spd) |
| { |
| static const char * const spd_str[] = { |
| "1.5 Gbps", |
| "3.0 Gbps", |
| }; |
| |
| if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str)) |
| return "<unknown>"; |
| return spd_str[spd - 1]; |
| } |
| |
| void ata_dev_disable(struct ata_device *dev) |
| { |
| if (ata_dev_enabled(dev)) { |
| if (ata_msg_drv(dev->link->ap)) |
| ata_dev_printk(dev, KERN_WARNING, "disabled\n"); |
| ata_acpi_on_disable(dev); |
| ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | |
| ATA_DNXFER_QUIET); |
| dev->class++; |
| } |
| } |
| |
| static int ata_dev_set_dipm(struct ata_device *dev, enum link_pm policy) |
| { |
| struct ata_link *link = dev->link; |
| struct ata_port *ap = link->ap; |
| u32 scontrol; |
| unsigned int err_mask; |
| int rc; |
| |
| /* |
| * disallow DIPM for drivers which haven't set |
| * ATA_FLAG_IPM. This is because when DIPM is enabled, |
| * phy ready will be set in the interrupt status on |
| * state changes, which will cause some drivers to |
| * think there are errors - additionally drivers will |
| * need to disable hot plug. |
| */ |
| if (!(ap->flags & ATA_FLAG_IPM) || !ata_dev_enabled(dev)) { |
| ap->pm_policy = NOT_AVAILABLE; |
| return -EINVAL; |
| } |
| |
| /* |
| * For DIPM, we will only enable it for the |
| * min_power setting. |
| * |
| * Why? Because Disks are too stupid to know that |
| * If the host rejects a request to go to SLUMBER |
| * they should retry at PARTIAL, and instead it |
| * just would give up. So, for medium_power to |
| * work at all, we need to only allow HIPM. |
| */ |
| rc = sata_scr_read(link, SCR_CONTROL, &scontrol); |
| if (rc) |
| return rc; |
| |
| switch (policy) { |
| case MIN_POWER: |
| /* no restrictions on IPM transitions */ |
| scontrol &= ~(0x3 << 8); |
| rc = sata_scr_write(link, SCR_CONTROL, scontrol); |
| if (rc) |
| return rc; |
| |
| /* enable DIPM */ |
| if (dev->flags & ATA_DFLAG_DIPM) |
| err_mask = ata_dev_set_feature(dev, |
| SETFEATURES_SATA_ENABLE, SATA_DIPM); |
| break; |
| case MEDIUM_POWER: |
| /* allow IPM to PARTIAL */ |
| scontrol &= ~(0x1 << 8); |
| scontrol |= (0x2 << 8); |
| rc = sata_scr_write(link, SCR_CONTROL, scontrol); |
| if (rc) |
| return rc; |
| |
| /* |
| * we don't have to disable DIPM since IPM flags |
| * disallow transitions to SLUMBER, which effectively |
| * disable DIPM if it does not support PARTIAL |
| */ |
| break; |
| case NOT_AVAILABLE: |
| case MAX_PERFORMANCE: |
| /* disable all IPM transitions */ |
| scontrol |= (0x3 << 8); |
| rc = sata_scr_write(link, SCR_CONTROL, scontrol); |
| if (rc) |
| return rc; |
| |
| /* |
| * we don't have to disable DIPM since IPM flags |
| * disallow all transitions which effectively |
| * disable DIPM anyway. |
| */ |
| break; |
| } |
| |
| /* FIXME: handle SET FEATURES failure */ |
| (void) err_mask; |
| |
| return 0; |
| } |
| |
| /** |
| * ata_dev_enable_pm - enable SATA interface power management |
| * @dev: device to enable power management |
| * @policy: the link power management policy |
| * |
| * Enable SATA Interface power management. This will enable |
| * Device Interface Power Management (DIPM) for min_power |
| * policy, and then call driver specific callbacks for |
| * enabling Host Initiated Power management. |
| * |
| * Locking: Caller. |
| * Returns: -EINVAL if IPM is not supported, 0 otherwise. |
| */ |
| void ata_dev_enable_pm(struct ata_device *dev, enum link_pm policy) |
| { |
| int rc = 0; |
| struct ata_port *ap = dev->link->ap; |
| |
| /* set HIPM first, then DIPM */ |
| if (ap->ops->enable_pm) |
| rc = ap->ops->enable_pm(ap, policy); |
| if (rc) |
| goto enable_pm_out; |
| rc = ata_dev_set_dipm(dev, policy); |
| |
| enable_pm_out: |
| if (rc) |
| ap->pm_policy = MAX_PERFORMANCE; |
| else |
| ap->pm_policy = policy; |
| return /* rc */; /* hopefully we can use 'rc' eventually */ |
| } |
| |
| #ifdef CONFIG_PM |
| /** |
| * ata_dev_disable_pm - disable SATA interface power management |
| * @dev: device to disable power management |
| * |
| * Disable SATA Interface power management. This will disable |
| * Device Interface Power Management (DIPM) without changing |
| * policy, call driver specific callbacks for disabling Host |
| * Initiated Power management. |
| * |
| * Locking: Caller. |
| * Returns: void |
| */ |
| static void ata_dev_disable_pm(struct ata_device *dev) |
| { |
| struct ata_port *ap = dev->link->ap; |
| |
| ata_dev_set_dipm(dev, MAX_PERFORMANCE); |
| if (ap->ops->disable_pm) |
| ap->ops->disable_pm(ap); |
| } |
| #endif /* CONFIG_PM */ |
| |
| void ata_lpm_schedule(struct ata_port *ap, enum link_pm policy) |
| { |
| ap->pm_policy = policy; |
| ap->link.eh_info.action |= ATA_EH_LPM; |
| ap->link.eh_info.flags |= ATA_EHI_NO_AUTOPSY; |
| ata_port_schedule_eh(ap); |
| } |
| |
| #ifdef CONFIG_PM |
| static void ata_lpm_enable(struct ata_host *host) |
| { |
| struct ata_link *link; |
| struct ata_port *ap; |
| struct ata_device *dev; |
| int i; |
| |
| for (i = 0; i < host->n_ports; i++) { |
| ap = host->ports[i]; |
| ata_port_for_each_link(link, ap) { |
| ata_link_for_each_dev(dev, link) |
| ata_dev_disable_pm(dev); |
| } |
| } |
| } |
| |
| static void ata_lpm_disable(struct ata_host *host) |
| { |
| int i; |
| |
| for (i = 0; i < host->n_ports; i++) { |
| struct ata_port *ap = host->ports[i]; |
| ata_lpm_schedule(ap, ap->pm_policy); |
| } |
| } |
| #endif /* CONFIG_PM */ |
| |
| /** |
| * ata_dev_classify - determine device type based on ATA-spec signature |
| * @tf: ATA taskfile register set for device to be identified |
| * |
| * Determine from taskfile register contents whether a device is |
| * ATA or ATAPI, as per "Signature and persistence" section |
| * of ATA/PI spec (volume 1, sect 5.14). |
| * |
| * LOCKING: |
| * None. |
| * |
| * RETURNS: |
| * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or |
| * %ATA_DEV_UNKNOWN the event of failure. |
| */ |
| unsigned int ata_dev_classify(const struct ata_taskfile *tf) |
| { |
| /* Apple's open source Darwin code hints that some devices only |
| * put a proper signature into the LBA mid/high registers, |
| * So, we only check those. It's sufficient for uniqueness. |
| * |
| * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate |
| * signatures for ATA and ATAPI devices attached on SerialATA, |
| * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA |
| * spec has never mentioned about using different signatures |
| * for ATA/ATAPI devices. Then, Serial ATA II: Port |
| * Multiplier specification began to use 0x69/0x96 to identify |
| * port multpliers and 0x3c/0xc3 to identify SEMB device. |
| * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and |
| * 0x69/0x96 shortly and described them as reserved for |
| * SerialATA. |
| * |
| * We follow the current spec and consider that 0x69/0x96 |
| * identifies a port multiplier and 0x3c/0xc3 a SEMB device. |
| */ |
| if ((tf->lbam == 0) && (tf->lbah == 0)) { |
| DPRINTK("found ATA device by sig\n"); |
| return ATA_DEV_ATA; |
| } |
| |
| if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) { |
| DPRINTK("found ATAPI device by sig\n"); |
| return ATA_DEV_ATAPI; |
| } |
| |
| if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) { |
| DPRINTK("found PMP device by sig\n"); |
| return ATA_DEV_PMP; |
| } |
| |
| if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) { |
| printk(KERN_INFO "ata: SEMB device ignored\n"); |
| return ATA_DEV_SEMB_UNSUP; /* not yet */ |
| } |
| |
| DPRINTK("unknown device\n"); |
| return ATA_DEV_UNKNOWN; |
| } |
| |
| /** |
| * ata_id_string - Convert IDENTIFY DEVICE page into string |
| * @id: IDENTIFY DEVICE results we will examine |
| * @s: string into which data is output |
| * @ofs: offset into identify device page |
| * @len: length of string to return. must be an even number. |
| * |
| * The strings in the IDENTIFY DEVICE page are broken up into |
| * 16-bit chunks. Run through the string, and output each |
| * 8-bit chunk linearly, regardless of platform. |
| * |
| * LOCKING: |
| * caller. |
| */ |
| |
| void ata_id_string(const u16 *id, unsigned char *s, |
| unsigned int ofs, unsigned int len) |
| { |
| unsigned int c; |
| |
| while (len > 0) { |
| c = id[ofs] >> 8; |
| *s = c; |
| s++; |
| |
| c = id[ofs] & 0xff; |
| *s = c; |
| s++; |
| |
| ofs++; |
| len -= 2; |
| } |
| } |
| |
| /** |
| * ata_id_c_string - Convert IDENTIFY DEVICE page into C string |
| * @id: IDENTIFY DEVICE results we will examine |
| * @s: string into which data is output |
| * @ofs: offset into identify device page |
| * @len: length of string to return. must be an odd number. |
| * |
| * This function is identical to ata_id_string except that it |
| * trims trailing spaces and terminates the resulting string with |
| * null. @len must be actual maximum length (even number) + 1. |
| * |
| * LOCKING: |
| * caller. |
| */ |
| void ata_id_c_string(const u16 *id, unsigned char *s, |
| unsigned int ofs, unsigned int len) |
| { |
| unsigned char *p; |
| |
| WARN_ON(!(len & 1)); |
| |
| ata_id_string(id, s, ofs, len - 1); |
| |
| p = s + strnlen(s, len - 1); |
| while (p > s && p[-1] == ' ') |
| p--; |
| *p = '\0'; |
| } |
| |
| static u64 ata_id_n_sectors(const u16 *id) |
| { |
| if (ata_id_has_lba(id)) { |
| if (ata_id_has_lba48(id)) |
| return ata_id_u64(id, 100); |
| else |
| return ata_id_u32(id, 60); |
| } else { |
| if (ata_id_current_chs_valid(id)) |
| return ata_id_u32(id, 57); |
| else |
| return id[1] * id[3] * id[6]; |
| } |
| } |
| |
| static u64 ata_tf_to_lba48(struct ata_taskfile *tf) |
| { |
| u64 sectors = 0; |
| |
| sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40; |
| sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32; |
| sectors |= (tf->hob_lbal & 0xff) << 24; |
| sectors |= (tf->lbah & 0xff) << 16; |
| sectors |= (tf->lbam & 0xff) << 8; |
| sectors |= (tf->lbal & 0xff); |
| |
| return ++sectors; |
| } |
| |
| static u64 ata_tf_to_lba(struct ata_taskfile *tf) |
| { |
| u64 sectors = 0; |
| |
| sectors |= (tf->device & 0x0f) << 24; |
| sectors |= (tf->lbah & 0xff) << 16; |
| sectors |= (tf->lbam & 0xff) << 8; |
| sectors |= (tf->lbal & 0xff); |
| |
| return ++sectors; |
| } |
| |
| /** |
| * ata_read_native_max_address - Read native max address |
| * @dev: target device |
| * @max_sectors: out parameter for the result native max address |
| * |
| * Perform an LBA48 or LBA28 native size query upon the device in |
| * question. |
| * |
| * RETURNS: |
| * 0 on success, -EACCES if command is aborted by the drive. |
| * -EIO on other errors. |
| */ |
| static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors) |
| { |
| unsigned int err_mask; |
| struct ata_taskfile tf; |
| int lba48 = ata_id_has_lba48(dev->id); |
| |
| ata_tf_init(dev, &tf); |
| |
| /* always clear all address registers */ |
| tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
| |
| if (lba48) { |
| tf.command = ATA_CMD_READ_NATIVE_MAX_EXT; |
| tf.flags |= ATA_TFLAG_LBA48; |
| } else |
| tf.command = ATA_CMD_READ_NATIVE_MAX; |
| |
| tf.protocol |= ATA_PROT_NODATA; |
| tf.device |= ATA_LBA; |
| |
| err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
| if (err_mask) { |
| ata_dev_printk(dev, KERN_WARNING, "failed to read native " |
| "max address (err_mask=0x%x)\n", err_mask); |
| if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) |
| return -EACCES; |
| return -EIO; |
| } |
| |
| if (lba48) |
| *max_sectors = ata_tf_to_lba48(&tf); |
| else |
| *max_sectors = ata_tf_to_lba(&tf); |
| if (dev->horkage & ATA_HORKAGE_HPA_SIZE) |
| (*max_sectors)--; |
| return 0; |
| } |
| |
| /** |
| * ata_set_max_sectors - Set max sectors |
| * @dev: target device |
| * @new_sectors: new max sectors value to set for the device |
| * |
| * Set max sectors of @dev to @new_sectors. |
| * |
| * RETURNS: |
| * 0 on success, -EACCES if command is aborted or denied (due to |
| * previous non-volatile SET_MAX) by the drive. -EIO on other |
| * errors. |
| */ |
| static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors) |
| { |
| unsigned int err_mask; |
| struct ata_taskfile tf; |
| int lba48 = ata_id_has_lba48(dev->id); |
| |
| new_sectors--; |
| |
| ata_tf_init(dev, &tf); |
| |
| tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; |
| |
| if (lba48) { |
| tf.command = ATA_CMD_SET_MAX_EXT; |
| tf.flags |= ATA_TFLAG_LBA48; |
| |
| tf.hob_lbal = (new_sectors >> 24) & 0xff; |
| tf.hob_lbam = (new_sectors >> 32) & 0xff; |
| tf.hob_lbah = (new_sectors >> 40) & 0xff; |
| } else { |
| tf.command = ATA_CMD_SET_MAX; |
| |
| tf.device |= (new_sectors >> 24) & 0xf; |
| } |
| |
| tf.protocol |= ATA_PROT_NODATA; |
| tf.device |= ATA_LBA; |
| |
| tf.lbal = (new_sectors >> 0) & 0xff; |
| tf.lbam = (new_sectors >> 8) & 0xff; |
| tf.lbah = (new_sectors >> 16) & 0xff; |
| |
| err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
| if (err_mask) { |
| ata_dev_printk(dev, KERN_WARNING, "failed to set " |
| "max address (err_mask=0x%x)\n", err_mask); |
| if (err_mask == AC_ERR_DEV && |
| (tf.feature & (ATA_ABORTED | ATA_IDNF))) |
| return -EACCES; |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * ata_hpa_resize - Resize a device with an HPA set |
| * @dev: Device to resize |
| * |
| * Read the size of an LBA28 or LBA48 disk with HPA features and resize |
| * it if required to the full size of the media. The caller must check |
| * the drive has the HPA feature set enabled. |
| * |
| * RETURNS: |
| * 0 on success, -errno on failure. |
| */ |
| static int ata_hpa_resize(struct ata_device *dev) |
| { |
| struct ata_eh_context *ehc = &dev->link->eh_context; |
| int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; |
| u64 sectors = ata_id_n_sectors(dev->id); |
| u64 native_sectors; |
| int rc; |
| |
| /* do we need to do it? */ |
| if (dev->class != ATA_DEV_ATA || |
| !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) || |
| (dev->horkage & ATA_HORKAGE_BROKEN_HPA)) |
| return 0; |
| |
| /* read native max address */ |
| rc = ata_read_native_max_address(dev, &native_sectors); |
| if (rc) { |
| /* If device aborted the command or HPA isn't going to |
| * be unlocked, skip HPA resizing. |
| */ |
| if (rc == -EACCES || !ata_ignore_hpa) { |
| ata_dev_printk(dev, KERN_WARNING, "HPA support seems " |
| "broken, skipping HPA handling\n"); |
| dev->horkage |= ATA_HORKAGE_BROKEN_HPA; |
| |
| /* we can continue if device aborted the command */ |
| if (rc == -EACCES) |
| rc = 0; |
| } |
| |
| return rc; |
| } |
| |
| /* nothing to do? */ |
| if (native_sectors <= sectors || !ata_ignore_hpa) { |
| if (!print_info || native_sectors == sectors) |
| return 0; |
| |
| if (native_sectors > sectors) |
| ata_dev_printk(dev, KERN_INFO, |
| "HPA detected: current %llu, native %llu\n", |
| (unsigned long long)sectors, |
| (unsigned long long)native_sectors); |
| else if (native_sectors < sectors) |
| ata_dev_printk(dev, KERN_WARNING, |
| "native sectors (%llu) is smaller than " |
| "sectors (%llu)\n", |
| (unsigned long long)native_sectors, |
| (unsigned long long)sectors); |
| return 0; |
| } |
| |
| /* let's unlock HPA */ |
| rc = ata_set_max_sectors(dev, native_sectors); |
| if (rc == -EACCES) { |
| /* if device aborted the command, skip HPA resizing */ |
| ata_dev_printk(dev, KERN_WARNING, "device aborted resize " |
| "(%llu -> %llu), skipping HPA handling\n", |
| (unsigned long long)sectors, |
| (unsigned long long)native_sectors); |
| dev->horkage |= ATA_HORKAGE_BROKEN_HPA; |
| return 0; |
| } else if (rc) |
| return rc; |
| |
| /* re-read IDENTIFY data */ |
| rc = ata_dev_reread_id(dev, 0); |
| if (rc) { |
| ata_dev_printk(dev, KERN_ERR, "failed to re-read IDENTIFY " |
| "data after HPA resizing\n"); |
| return rc; |
| } |
| |
| if (print_info) { |
| u64 new_sectors = ata_id_n_sectors(dev->id); |
| ata_dev_printk(dev, KERN_INFO, |
| "HPA unlocked: %llu -> %llu, native %llu\n", |
| (unsigned long long)sectors, |
| (unsigned long long)new_sectors, |
| (unsigned long long)native_sectors); |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * ata_noop_dev_select - Select device 0/1 on ATA bus |
| * @ap: ATA channel to manipulate |
| * @device: ATA device (numbered from zero) to select |
| * |
| * This function performs no actual function. |
| * |
| * May be used as the dev_select() entry in ata_port_operations. |
| * |
| * LOCKING: |
| * caller. |
| */ |
| void ata_noop_dev_select(struct ata_port *ap, unsigned int device) |
| { |
| } |
| |
| /** |
| * ata_dump_id - IDENTIFY DEVICE info debugging output |
| * @id: IDENTIFY DEVICE page to dump |
| * |
| * Dump selected 16-bit words from the given IDENTIFY DEVICE |
| * page. |
| * |
| * LOCKING: |
| * caller. |
| */ |
| |
| static inline void ata_dump_id(const u16 *id) |
| { |
| DPRINTK("49==0x%04x " |
| "53==0x%04x " |
| "63==0x%04x " |
| "64==0x%04x " |
| "75==0x%04x \n", |
| id[49], |
| id[53], |
| id[63], |
| id[64], |
| id[75]); |
| DPRINTK("80==0x%04x " |
| "81==0x%04x " |
| "82==0x%04x " |
| "83==0x%04x " |
| "84==0x%04x \n", |
| id[80], |
| id[81], |
| id[82], |
| id[83], |
| id[84]); |
| DPRINTK("88==0x%04x " |
| "93==0x%04x\n", |
| id[88], |
| id[93]); |
| } |
| |
| /** |
| * ata_id_xfermask - Compute xfermask from the given IDENTIFY data |
| * @id: IDENTIFY data to compute xfer mask from |
| * |
| * Compute the xfermask for this device. This is not as trivial |
| * as it seems if we must consider early devices correctly. |
| * |
| * FIXME: pre IDE drive timing (do we care ?). |
| * |
| * LOCKING: |
| * None. |
| * |
| * RETURNS: |
| * Computed xfermask |
| */ |
| unsigned long ata_id_xfermask(const u16 *id) |
| { |
| unsigned long pio_mask, mwdma_mask, udma_mask; |
| |
| /* Usual case. Word 53 indicates word 64 is valid */ |
| if (id[ATA_ID_FIELD_VALID] & (1 << 1)) { |
| pio_mask = id[ATA_ID_PIO_MODES] & 0x03; |
| pio_mask <<= 3; |
| pio_mask |= 0x7; |
| } else { |
| /* If word 64 isn't valid then Word 51 high byte holds |
| * the PIO timing number for the maximum. Turn it into |
| * a mask. |
| */ |
| u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF; |
| if (mode < 5) /* Valid PIO range */ |
| pio_mask = (2 << mode) - 1; |
| else |
| pio_mask = 1; |
| |
| /* But wait.. there's more. Design your standards by |
| * committee and you too can get a free iordy field to |
| * process. However its the speeds not the modes that |
| * are supported... Note drivers using the timing API |
| * will get this right anyway |
| */ |
| } |
| |
| mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07; |
| |
| if (ata_id_is_cfa(id)) { |
| /* |
| * Process compact flash extended modes |
| */ |
| int pio = id[163] & 0x7; |
| int dma = (id[163] >> 3) & 7; |
| |
| if (pio) |
| pio_mask |= (1 << 5); |
| if (pio > 1) |
| pio_mask |= (1 << 6); |
| if (dma) |
| mwdma_mask |= (1 << 3); |
| if (dma > 1) |
| mwdma_mask |= (1 << 4); |
| } |
| |
| udma_mask = 0; |
| if (id[ATA_ID_FIELD_VALID] & (1 << 2)) |
| udma_mask = id[ATA_ID_UDMA_MODES] & 0xff; |
| |
| return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); |
| } |
| |
| /** |
| * ata_pio_queue_task - Queue port_task |
| * @ap: The ata_port to queue port_task for |
| * @fn: workqueue function to be scheduled |
| * @data: data for @fn to use |
| * @delay: delay time for workqueue function |
| * |
| * Schedule @fn(@data) for execution after @delay jiffies using |
| * port_task. There is one port_task per port and it's the |
| * user(low level driver)'s responsibility to make sure that only |
| * one task is active at any given time. |
| * |
| * libata core layer takes care of synchronization between |
| * port_task and EH. ata_pio_queue_task() may be ignored for EH |
| * synchronization. |
| * |
| * LOCKING: |
| * Inherited from caller. |
| */ |
| void ata_pio_queue_task(struct ata_port *ap, void *data, unsigned long delay) |
| { |
| ap->port_task_data = data; |
| |
| /* may fail if ata_port_flush_task() in progress */ |
| queue_delayed_work(ata_wq, &ap->port_task, delay); |
| } |
| |
| /** |
| * ata_port_flush_task - Flush port_task |
| * @ap: The ata_port to flush port_task for |
| * |
| * After this function completes, port_task is guranteed not to |
| * be running or scheduled. |
| * |
| * LOCKING: |
| * Kernel thread context (may sleep) |
| */ |
| void ata_port_flush_task(struct ata_port *ap) |
| { |
| DPRINTK("ENTER\n"); |
| |
| cancel_rearming_delayed_work(&ap->port_task); |
| |
| if (ata_msg_ctl(ap)) |
| ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __func__); |
| } |
| |
| static void ata_qc_complete_internal(struct ata_queued_cmd *qc) |
| { |
| struct completion *waiting = qc->private_data; |
| |
| complete(waiting); |
| } |
| |
| /** |
| * ata_exec_internal_sg - execute libata internal command |
| * @dev: Device to which the command is sent |
| * @tf: Taskfile registers for the command and the result |
| * @cdb: CDB for packet command |
| * @dma_dir: Data tranfer direction of the command |
| * @sgl: sg list for the data buffer of the command |
| * @n_elem: Number of sg entries |
| * @timeout: Timeout in msecs (0 for default) |
| * |
| * Executes libata internal command with timeout. @tf contains |
| * command on entry and result on return. Timeout and error |
| * conditions are reported via return value. No recovery action |
| * is taken after a command times out. It's caller's duty to |
| * clean up after timeout. |
| * |
| * LOCKING: |
| * None. Should be called with kernel context, might sleep. |
| * |
| * RETURNS: |
| * Zero on success, AC_ERR_* mask on failure |
| */ |
| unsigned ata_exec_internal_sg(struct ata_device *dev, |
| struct ata_taskfile *tf, const u8 *cdb, |
| int dma_dir, struct scatterlist *sgl, |
| unsigned int n_elem, unsigned long timeout) |
| { |
| struct ata_link *link = dev->link; |
| struct ata_port *ap = link->ap; |
| u8 command = tf->command; |
| struct ata_queued_cmd *qc; |
| unsigned int tag, preempted_tag; |
| u32 preempted_sactive, preempted_qc_active; |
| int preempted_nr_active_links; |
| DECLARE_COMPLETION_ONSTACK(wait); |
| unsigned long flags; |
| unsigned int err_mask; |
| int rc; |
| |
| spin_lock_irqsave(ap->lock, flags); |
| |
| /* no internal command while frozen */ |
| if (ap->pflags & ATA_PFLAG_FROZEN) { |
| spin_unlock_irqrestore(ap->lock, flags); |
| return AC_ERR_SYSTEM; |
| } |
| |
| /* initialize internal qc */ |
| |
| /* XXX: Tag 0 is used for drivers with legacy EH as some |
| * drivers choke if any other tag is given. This breaks |
| * ata_tag_internal() test for those drivers. Don't use new |
| * EH stuff without converting to it. |
| */ |
| if (ap->ops->error_handler) |
| tag = ATA_TAG_INTERNAL; |
| else |
| tag = 0; |
| |
| if (test_and_set_bit(tag, &ap->qc_allocated)) |
| BUG(); |
| qc = __ata_qc_from_tag(ap, tag); |
| |
| qc->tag = tag; |
| qc->scsicmd = NULL; |
| qc->ap = ap; |
| qc->dev = dev; |
| ata_qc_reinit(qc); |
| |
| preempted_tag = link->active_tag; |
| preempted_sactive = link->sactive; |
| preempted_qc_active = ap->qc_active; |
| preempted_nr_active_links = ap->nr_active_links; |
| link->active_tag = ATA_TAG_POISON; |
| link->sactive = 0; |
| ap->qc_active = 0; |
| ap->nr_active_links = 0; |
| |
| /* prepare & issue qc */ |
| qc->tf = *tf; |
| if (cdb) |
| memcpy(qc->cdb, cdb, ATAPI_CDB_LEN); |
| qc->flags |= ATA_QCFLAG_RESULT_TF; |
| qc->dma_dir = dma_dir; |
| if (dma_dir != DMA_NONE) { |
| unsigned int i, buflen = 0; |
| struct scatterlist *sg; |
| |
| for_each_sg(sgl, sg, n_elem, i) |
| buflen += sg->length; |
| |
| ata_sg_init(qc, sgl, n_elem); |
| qc->nbytes = buflen; |
| } |
| |
| qc->private_data = &wait; |
| qc->complete_fn = ata_qc_complete_internal; |
| |
| ata_qc_issue(qc); |
| |
| spin_unlock_irqrestore(ap->lock, flags); |
| |
| if (!timeout) |
| timeout = ata_probe_timeout * 1000 / HZ; |
| |
| rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout)); |
| |
| ata_port_flush_task(ap); |
| |
| if (!rc) { |
| spin_lock_irqsave(ap->lock, flags); |
| |
| /* We're racing with irq here. If we lose, the |
| * following test prevents us from completing the qc |
| * twice. If we win, the port is frozen and will be |
| * cleaned up by ->post_internal_cmd(). |
| */ |
| if (qc->flags & ATA_QCFLAG_ACTIVE) { |
| qc->err_mask |= AC_ERR_TIMEOUT; |
| |
| if (ap->ops->error_handler) |
| ata_port_freeze(ap); |
| else |
| ata_qc_complete(qc); |
| |
| if (ata_msg_warn(ap)) |
| ata_dev_printk(dev, KERN_WARNING, |
| "qc timeout (cmd 0x%x)\n", command); |
| } |
| |
| spin_unlock_irqrestore(ap->lock, flags); |
| } |
| |
| /* do post_internal_cmd */ |
| if (ap->ops->post_internal_cmd) |
| ap->ops->post_internal_cmd(qc); |
| |
| /* perform minimal error analysis */ |
| if (qc->flags & ATA_QCFLAG_FAILED) { |
| if (qc->result_tf.command & (ATA_ERR | ATA_DF)) |
| qc->err_mask |= AC_ERR_DEV; |
| |
| if (!qc->err_mask) |
| qc->err_mask |= AC_ERR_OTHER; |
| |
| if (qc->err_mask & ~AC_ERR_OTHER) |
| qc->err_mask &= ~AC_ERR_OTHER; |
| } |
| |
| /* finish up */ |
| spin_lock_irqsave(ap->lock, flags); |
| |
| *tf = qc->result_tf; |
| err_mask = qc->err_mask; |
| |
| ata_qc_free(qc); |
| link->active_tag = preempted_tag; |
| link->sactive = preempted_sactive; |
| ap->qc_active = preempted_qc_active; |
| ap->nr_active_links = preempted_nr_active_links; |
| |
| /* XXX - Some LLDDs (sata_mv) disable port on command failure. |
| * Until those drivers are fixed, we detect the condition |
| * here, fail the command with AC_ERR_SYSTEM and reenable the |
| * port. |
| * |
| * Note that this doesn't change any behavior as internal |
| * command failure results in disabling the device in the |
| * higher layer for LLDDs without new reset/EH callbacks. |
| * |
| * Kill the following code as soon as those drivers are fixed. |
| */ |
| if (ap->flags & ATA_FLAG_DISABLED) { |
| err_mask |= AC_ERR_SYSTEM; |
| ata_port_probe(ap); |
| } |
| |
| spin_unlock_irqrestore(ap->lock, flags); |
| |
| return err_mask; |
| } |
| |
| /** |
| * ata_exec_internal - execute libata internal command |
| * @dev: Device to which the command is sent |
| * @tf: Taskfile registers for the command and the result |
| * @cdb: CDB for packet command |
| * @dma_dir: Data tranfer direction of the command |
| * @buf: Data buffer of the command |
| * @buflen: Length of data buffer |
| * @timeout: Timeout in msecs (0 for default) |
| * |
| * Wrapper around ata_exec_internal_sg() which takes simple |
| * buffer instead of sg list. |
| * |
| * LOCKING: |
| * None. Should be called with kernel context, might sleep. |
| * |
| * RETURNS: |
| * Zero on success, AC_ERR_* mask on failure |
| */ |
| unsigned ata_exec_internal(struct ata_device *dev, |
| struct ata_taskfile *tf, const u8 *cdb, |
| int dma_dir, void *buf, unsigned int buflen, |
| unsigned long timeout) |
| { |
| struct scatterlist *psg = NULL, sg; |
| unsigned int n_elem = 0; |
| |
| if (dma_dir != DMA_NONE) { |
| WARN_ON(!buf); |
| sg_init_one(&sg, buf, buflen); |
| psg = &sg; |
| n_elem++; |
| } |
| |
| return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem, |
| timeout); |
| } |
| |
| /** |
| * ata_do_simple_cmd - execute simple internal command |
| * @dev: Device to which the command is sent |
| * @cmd: Opcode to execute |
| * |
| * Execute a 'simple' command, that only consists of the opcode |
| * 'cmd' itself, without filling any other registers |
| * |
| * LOCKING: |
| * Kernel thread context (may sleep). |
| * |
| * RETURNS: |
| * Zero on success, AC_ERR_* mask on failure |
| */ |
| unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd) |
| { |
| struct ata_taskfile tf; |
| |
| ata_tf_init(dev, &tf); |
| |
| tf.command = cmd; |
| tf.flags |= ATA_TFLAG_DEVICE; |
| tf.protocol = ATA_PROT_NODATA; |
| |
| return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
| } |
| |
| /** |
| * ata_pio_need_iordy - check if iordy needed |
| * @adev: ATA device |
| * |
| * Check if the current speed of the device requires IORDY. Used |
| * by various controllers for chip configuration. |
| */ |
| |
| unsigned int ata_pio_need_iordy(const struct ata_device *adev) |
| { |
| /* Controller doesn't support IORDY. Probably a pointless check |
| as the caller should know this */ |
| if (adev->link->ap->flags & ATA_FLAG_NO_IORDY) |
| return 0; |
| /* PIO3 and higher it is mandatory */ |
| if (adev->pio_mode > XFER_PIO_2) |
| return 1; |
| /* We turn it on when possible */ |
| if (ata_id_has_iordy(adev->id)) |
| return 1; |
| return 0; |
| } |
| |
| /** |
| * ata_pio_mask_no_iordy - Return the non IORDY mask |
| * @adev: ATA device |
| * |
| * Compute the highest mode possible if we are not using iordy. Return |
| * -1 if no iordy mode is available. |
| */ |
| |
| static u32 ata_pio_mask_no_iordy(const struct ata_device *adev) |
| { |
| /* If we have no drive specific rule, then PIO 2 is non IORDY */ |
| if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */ |
| u16 pio = adev->id[ATA_ID_EIDE_PIO]; |
| /* Is the speed faster than the drive allows non IORDY ? */ |
| if (pio) { |
| /* This is cycle times not frequency - watch the logic! */ |
| if (pio > 240) /* PIO2 is 240nS per cycle */ |
| return 3 << ATA_SHIFT_PIO; |
| return 7 << ATA_SHIFT_PIO; |
| } |
| } |
| return 3 << ATA_SHIFT_PIO; |
| } |
| |
| /** |
| * ata_dev_read_id - Read ID data from the specified device |
| * @dev: target device |
| * @p_class: pointer to class of the target device (may be changed) |
| * @flags: ATA_READID_* flags |
| * @id: buffer to read IDENTIFY data into |
| * |
| * Read ID data from the specified device. ATA_CMD_ID_ATA is |
| * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI |
| * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS |
| * for pre-ATA4 drives. |
| * |
| * FIXME: ATA_CMD_ID_ATA is optional for early drives and right |
| * now we abort if we hit that case. |
| * |
| * LOCKING: |
| * Kernel thread context (may sleep) |
| * |
| * RETURNS: |
| * 0 on success, -errno otherwise. |
| */ |
| int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, |
| unsigned int flags, u16 *id) |
| { |
| struct ata_port *ap = dev->link->ap; |
| unsigned int class = *p_class; |
| struct ata_taskfile tf; |
| unsigned int err_mask = 0; |
| const char *reason; |
| int may_fallback = 1, tried_spinup = 0; |
| int rc; |
| |
| if (ata_msg_ctl(ap)) |
| ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__); |
| |
| retry: |
| ata_tf_init(dev, &tf); |
| |
| switch (class) { |
| case ATA_DEV_ATA: |
| tf.command = ATA_CMD_ID_ATA; |
| break; |
| case ATA_DEV_ATAPI: |
| tf.command = ATA_CMD_ID_ATAPI; |
| break; |
| default: |
| rc = -ENODEV; |
| reason = "unsupported class"; |
| goto err_out; |
| } |
| |
| tf.protocol = ATA_PROT_PIO; |
| |
| /* Some devices choke if TF registers contain garbage. Make |
| * sure those are properly initialized. |
| */ |
| tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| |
| /* Device presence detection is unreliable on some |
| * controllers. Always poll IDENTIFY if available. |
| */ |
| tf.flags |= ATA_TFLAG_POLLING; |
| |
| err_mask = ata_exec_internal(dev, &tf, NULL, DMA_FROM_DEVICE, |
| id, sizeof(id[0]) * ATA_ID_WORDS, 0); |
| if (err_mask) { |
| if (err_mask & AC_ERR_NODEV_HINT) { |
| ata_dev_printk(dev, KERN_DEBUG, |
| "NODEV after polling detection\n"); |
| return -ENOENT; |
| } |
| |
| if ((err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) { |
| /* Device or controller might have reported |
| * the wrong device class. Give a shot at the |
| * other IDENTIFY if the current one is |
| * aborted by the device. |
| */ |
| if (may_fallback) { |
| may_fallback = 0; |
| |
| if (class == ATA_DEV_ATA) |
| class = ATA_DEV_ATAPI; |
| else |
| class = ATA_DEV_ATA; |
| goto retry; |
| } |
| |
| /* Control reaches here iff the device aborted |
| * both flavors of IDENTIFYs which happens |
| * sometimes with phantom devices. |
| */ |
| ata_dev_printk(dev, KERN_DEBUG, |
| "both IDENTIFYs aborted, assuming NODEV\n"); |
| return -ENOENT; |
| } |
| |
| rc = -EIO; |
| reason = "I/O error"; |
| goto err_out; |
| } |
| |
| /* Falling back doesn't make sense if ID data was read |
| * successfully at least once. |
| */ |
| may_fallback = 0; |
| |
| swap_buf_le16(id, ATA_ID_WORDS); |
| |
| /* sanity check */ |
| rc = -EINVAL; |
| reason = "device reports invalid type"; |
| |
| if (class == ATA_DEV_ATA) { |
| if (!ata_id_is_ata(id) && !ata_id_is_cfa(id)) |
| goto err_out; |
| } else { |
| if (ata_id_is_ata(id)) |
| goto err_out; |
| } |
| |
| if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) { |
| tried_spinup = 1; |
| /* |
| * Drive powered-up in standby mode, and requires a specific |
| * SET_FEATURES spin-up subcommand before it will accept |
| * anything other than the original IDENTIFY command. |
| */ |
| err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0); |
| if (err_mask && id[2] != 0x738c) { |
| rc = -EIO; |
| reason = "SPINUP failed"; |
| goto err_out; |
| } |
| /* |
| * If the drive initially returned incomplete IDENTIFY info, |
| * we now must reissue the IDENTIFY command. |
| */ |
| if (id[2] == 0x37c8) |
| goto retry; |
| } |
| |
| if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) { |
| /* |
| * The exact sequence expected by certain pre-ATA4 drives is: |
| * SRST RESET |
| * IDENTIFY (optional in early ATA) |
| * INITIALIZE DEVICE PARAMETERS (later IDE and ATA) |
| * anything else.. |
| * Some drives were very specific about that exact sequence. |
| * |
| * Note that ATA4 says lba is mandatory so the second check |
| * shoud never trigger. |
| */ |
| if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) { |
| err_mask = ata_dev_init_params(dev, id[3], id[6]); |
| if (err_mask) { |
| rc = -EIO; |
| reason = "INIT_DEV_PARAMS failed"; |
| goto err_out; |
| } |
| |
| /* current CHS translation info (id[53-58]) might be |
| * changed. reread the identify device info. |
| */ |
| flags &= ~ATA_READID_POSTRESET; |
| goto retry; |
| } |
| } |
| |
| *p_class = class; |
| |
| return 0; |
| |
| err_out: |
| if (ata_msg_warn(ap)) |
| ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY " |
| "(%s, err_mask=0x%x)\n", reason, err_mask); |
| return rc; |
| } |
| |
| static inline u8 ata_dev_knobble(struct ata_device *dev) |
| { |
| struct ata_port *ap = dev->link->ap; |
| return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id))); |
| } |
| |
| static void ata_dev_config_ncq(struct ata_device *dev, |
| char *desc, size_t desc_sz) |
| { |
| struct ata_port *ap = dev->link->ap; |
| int hdepth = 0, ddepth = ata_id_queue_depth(dev->id); |
| |
| if (!ata_id_has_ncq(dev->id)) { |
| desc[0] = '\0'; |
| return; |
| } |
| if (dev->horkage & ATA_HORKAGE_NONCQ) { |
| snprintf(desc, desc_sz, "NCQ (not used)"); |
| return; |
| } |
| if (ap->flags & ATA_FLAG_NCQ) { |
| hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1); |
| dev->flags |= ATA_DFLAG_NCQ; |
| } |
| |
| if (hdepth >= ddepth) |
| snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth); |
| else |
| snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth); |
| } |
| |
| /** |
| * ata_dev_configure - Configure the specified ATA/ATAPI device |
| * @dev: Target device to configure |
| * |
| * Configure @dev according to @dev->id. Generic and low-level |
| * driver specific fixups are also applied. |
| * |
| * LOCKING: |
| * Kernel thread context (may sleep) |
| * |
| * RETURNS: |
| * 0 on success, -errno otherwise |
| */ |
| int ata_dev_configure(struct ata_device *dev) |
| { |
| struct ata_port *ap = dev->link->ap; |
| struct ata_eh_context *ehc = &dev->link->eh_context; |
| int print_info = ehc->i.flags & ATA_EHI_PRINTINFO; |
| const u16 *id = dev->id; |
| unsigned long xfer_mask; |
| char revbuf[7]; /* XYZ-99\0 */ |
| char fwrevbuf[ATA_ID_FW_REV_LEN+1]; |
| char modelbuf[ATA_ID_PROD_LEN+1]; |
| int rc; |
| |
| if (!ata_dev_enabled(dev) && ata_msg_info(ap)) { |
| ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n", |
| __func__); |
| return 0; |
| } |
| |
| if (ata_msg_probe(ap)) |
| ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__); |
| |
| /* set horkage */ |
| dev->horkage |= ata_dev_blacklisted(dev); |
| ata_force_horkage(dev); |
| |
| /* let ACPI work its magic */ |
| rc = ata_acpi_on_devcfg(dev); |
| if (rc) |
| return rc; |
| |
| /* massage HPA, do it early as it might change IDENTIFY data */ |
| rc = ata_hpa_resize(dev); |
| if (rc) |
| return rc; |
| |
| /* print device capabilities */ |
| if (ata_msg_probe(ap)) |
| ata_dev_printk(dev, KERN_DEBUG, |
| "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x " |
| "85:%04x 86:%04x 87:%04x 88:%04x\n", |
| __func__, |
| id[49], id[82], id[83], id[84], |
| id[85], id[86], id[87], id[88]); |
| |
| /* initialize to-be-configured parameters */ |
| dev->flags &= ~ATA_DFLAG_CFG_MASK; |
| dev->max_sectors = 0; |
| dev->cdb_len = 0; |
| dev->n_sectors = 0; |
| dev->cylinders = 0; |
| dev->heads = 0; |
| dev->sectors = 0; |
| |
| /* |
| * common ATA, ATAPI feature tests |
| */ |
| |
| /* find max transfer mode; for printk only */ |
| xfer_mask = ata_id_xfermask(id); |
| |
| if (ata_msg_probe(ap)) |
| ata_dump_id(id); |
| |
| /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */ |
| ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV, |
| sizeof(fwrevbuf)); |
| |
| ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD, |
| sizeof(modelbuf)); |
| |
| /* ATA-specific feature tests */ |
| if (dev->class == ATA_DEV_ATA) { |
| if (ata_id_is_cfa(id)) { |
| if (id[162] & 1) /* CPRM may make this media unusable */ |
| ata_dev_printk(dev, KERN_WARNING, |
| "supports DRM functions and may " |
| "not be fully accessable.\n"); |
| snprintf(revbuf, 7, "CFA"); |
| } else { |
| snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id)); |
| /* Warn the user if the device has TPM extensions */ |
| if (ata_id_has_tpm(id)) |
| ata_dev_printk(dev, KERN_WARNING, |
| "supports DRM functions and may " |
| "not be fully accessable.\n"); |
| } |
| |
| dev->n_sectors = ata_id_n_sectors(id); |
| |
| if (dev->id[59] & 0x100) |
| dev->multi_count = dev->id[59] & 0xff; |
| |
| if (ata_id_has_lba(id)) { |
| const char *lba_desc; |
| char ncq_desc[20]; |
| |
| lba_desc = "LBA"; |
| dev->flags |= ATA_DFLAG_LBA; |
| if (ata_id_has_lba48(id)) { |
| dev->flags |= ATA_DFLAG_LBA48; |
| lba_desc = "LBA48"; |
| |
| if (dev->n_sectors >= (1UL << 28) && |
| ata_id_has_flush_ext(id)) |
| dev->flags |= ATA_DFLAG_FLUSH_EXT; |
| } |
| |
| /* config NCQ */ |
| ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc)); |
| |
| /* print device info to dmesg */ |
| if (ata_msg_drv(ap) && print_info) { |
| ata_dev_printk(dev, KERN_INFO, |
| "%s: %s, %s, max %s\n", |
| revbuf, modelbuf, fwrevbuf, |
| ata_mode_string(xfer_mask)); |
| ata_dev_printk(dev, KERN_INFO, |
| "%Lu sectors, multi %u: %s %s\n", |
| (unsigned long long)dev->n_sectors, |
| dev->multi_count, lba_desc, ncq_desc); |
| } |
| } else { |
| /* CHS */ |
| |
| /* Default translation */ |
| dev->cylinders = id[1]; |
| dev->heads = id[3]; |
| dev->sectors = id[6]; |
| |
| if (ata_id_current_chs_valid(id)) { |
| /* Current CHS translation is valid. */ |
| dev->cylinders = id[54]; |
| dev->heads = id[55]; |
| dev->sectors = id[56]; |
| } |
| |
| /* print device info to dmesg */ |
| if (ata_msg_drv(ap) && print_info) { |
| ata_dev_printk(dev, KERN_INFO, |
| "%s: %s, %s, max %s\n", |
| revbuf, modelbuf, fwrevbuf, |
| ata_mode_string(xfer_mask)); |
| ata_dev_printk(dev, KERN_INFO, |
| "%Lu sectors, multi %u, CHS %u/%u/%u\n", |
| (unsigned long long)dev->n_sectors, |
| dev->multi_count, dev->cylinders, |
| dev->heads, dev->sectors); |
| } |
| } |
| |
| dev->cdb_len = 16; |
| } |
| |
| /* ATAPI-specific feature tests */ |
| else if (dev->class == ATA_DEV_ATAPI) { |
| const char *cdb_intr_string = ""; |
| const char *atapi_an_string = ""; |
| const char *dma_dir_string = ""; |
| u32 sntf; |
| |
| rc = atapi_cdb_len(id); |
| if ((rc < 12) || (rc > ATAPI_CDB_LEN)) { |
| if (ata_msg_warn(ap)) |
| ata_dev_printk(dev, KERN_WARNING, |
| "unsupported CDB len\n"); |
| rc = -EINVAL; |
| goto err_out_nosup; |
| } |
| dev->cdb_len = (unsigned int) rc; |
| |
| /* Enable ATAPI AN if both the host and device have |
| * the support. If PMP is attached, SNTF is required |
| * to enable ATAPI AN to discern between PHY status |
| * changed notifications and ATAPI ANs. |
| */ |
| if ((ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) && |
| (!ap->nr_pmp_links || |
| sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) { |
| unsigned int err_mask; |
| |
| /* issue SET feature command to turn this on */ |
| err_mask = ata_dev_set_feature(dev, |
| SETFEATURES_SATA_ENABLE, SATA_AN); |
| if (err_mask) |
| ata_dev_printk(dev, KERN_ERR, |
| "failed to enable ATAPI AN " |
| "(err_mask=0x%x)\n", err_mask); |
| else { |
| dev->flags |= ATA_DFLAG_AN; |
| atapi_an_string = ", ATAPI AN"; |
| } |
| } |
| |
| if (ata_id_cdb_intr(dev->id)) { |
| dev->flags |= ATA_DFLAG_CDB_INTR; |
| cdb_intr_string = ", CDB intr"; |
| } |
| |
| if (atapi_dmadir || atapi_id_dmadir(dev->id)) { |
| dev->flags |= ATA_DFLAG_DMADIR; |
| dma_dir_string = ", DMADIR"; |
| } |
| |
| /* print device info to dmesg */ |
| if (ata_msg_drv(ap) && print_info) |
| ata_dev_printk(dev, KERN_INFO, |
| "ATAPI: %s, %s, max %s%s%s%s\n", |
| modelbuf, fwrevbuf, |
| ata_mode_string(xfer_mask), |
| cdb_intr_string, atapi_an_string, |
| dma_dir_string); |
| } |
| |
| /* determine max_sectors */ |
| dev->max_sectors = ATA_MAX_SECTORS; |
| if (dev->flags & ATA_DFLAG_LBA48) |
| dev->max_sectors = ATA_MAX_SECTORS_LBA48; |
| |
| if (!(dev->horkage & ATA_HORKAGE_IPM)) { |
| if (ata_id_has_hipm(dev->id)) |
| dev->flags |= ATA_DFLAG_HIPM; |
| if (ata_id_has_dipm(dev->id)) |
| dev->flags |= ATA_DFLAG_DIPM; |
| } |
| |
| /* Limit PATA drive on SATA cable bridge transfers to udma5, |
| 200 sectors */ |
| if (ata_dev_knobble(dev)) { |
| if (ata_msg_drv(ap) && print_info) |
| ata_dev_printk(dev, KERN_INFO, |
| "applying bridge limits\n"); |
| dev->udma_mask &= ATA_UDMA5; |
| dev->max_sectors = ATA_MAX_SECTORS; |
| } |
| |
| if ((dev->class == ATA_DEV_ATAPI) && |
| (atapi_command_packet_set(id) == TYPE_TAPE)) { |
| dev->max_sectors = ATA_MAX_SECTORS_TAPE; |
| dev->horkage |= ATA_HORKAGE_STUCK_ERR; |
| } |
| |
| if (dev->horkage & ATA_HORKAGE_MAX_SEC_128) |
| dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128, |
| dev->max_sectors); |
| |
| if (ata_dev_blacklisted(dev) & ATA_HORKAGE_IPM) { |
| dev->horkage |= ATA_HORKAGE_IPM; |
| |
| /* reset link pm_policy for this port to no pm */ |
| ap->pm_policy = MAX_PERFORMANCE; |
| } |
| |
| if (ap->ops->dev_config) |
| ap->ops->dev_config(dev); |
| |
| if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) { |
| /* Let the user know. We don't want to disallow opens for |
| rescue purposes, or in case the vendor is just a blithering |
| idiot. Do this after the dev_config call as some controllers |
| with buggy firmware may want to avoid reporting false device |
| bugs */ |
| |
| if (print_info) { |
| ata_dev_printk(dev, KERN_WARNING, |
| "Drive reports diagnostics failure. This may indicate a drive\n"); |
| ata_dev_printk(dev, KERN_WARNING, |
| "fault or invalid emulation. Contact drive vendor for information.\n"); |
| } |
| } |
| |
| if (ata_msg_probe(ap)) |
| ata_dev_printk(dev, KERN_DEBUG, "%s: EXIT, drv_stat = 0x%x\n", |
| __func__, ata_chk_status(ap)); |
| return 0; |
| |
| err_out_nosup: |
| if (ata_msg_probe(ap)) |
| ata_dev_printk(dev, KERN_DEBUG, |
| "%s: EXIT, err\n", __func__); |
| return rc; |
| } |
| |
| /** |
| * ata_cable_40wire - return 40 wire cable type |
| * @ap: port |
| * |
| * Helper method for drivers which want to hardwire 40 wire cable |
| * detection. |
| */ |
| |
| int ata_cable_40wire(struct ata_port *ap) |
| { |
| return ATA_CBL_PATA40; |
| } |
| |
| /** |
| * ata_cable_80wire - return 80 wire cable type |
| * @ap: port |
| * |
| * Helper method for drivers which want to hardwire 80 wire cable |
| * detection. |
| */ |
| |
| int ata_cable_80wire(struct ata_port *ap) |
| { |
| return ATA_CBL_PATA80; |
| } |
| |
| /** |
| * ata_cable_unknown - return unknown PATA cable. |
| * @ap: port |
| * |
| * Helper method for drivers which have no PATA cable detection. |
| */ |
| |
| int ata_cable_unknown(struct ata_port *ap) |
| { |
| return ATA_CBL_PATA_UNK; |
| } |
| |
| /** |
| * ata_cable_ignore - return ignored PATA cable. |
| * @ap: port |
| * |
| * Helper method for drivers which don't use cable type to limit |
| * transfer mode. |
| */ |
| int ata_cable_ignore(struct ata_port *ap) |
| { |
| return ATA_CBL_PATA_IGN; |
| } |
| |
| /** |
| * ata_cable_sata - return SATA cable type |
| * @ap: port |
| * |
| * Helper method for drivers which have SATA cables |
| */ |
| |
| int ata_cable_sata(struct ata_port *ap) |
| { |
| return ATA_CBL_SATA; |
| } |
| |
| /** |
| * ata_bus_probe - Reset and probe ATA bus |
| * @ap: Bus to probe |
| * |
| * Master ATA bus probing function. Initiates a hardware-dependent |
| * bus reset, then attempts to identify any devices found on |
| * the bus. |
| * |
| * LOCKING: |
| * PCI/etc. bus probe sem. |
| * |
| * RETURNS: |
| * Zero on success, negative errno otherwise. |
| */ |
| |
| int ata_bus_probe(struct ata_port *ap) |
| { |
| unsigned int classes[ATA_MAX_DEVICES]; |
| int tries[ATA_MAX_DEVICES]; |
| int rc; |
| struct ata_device *dev; |
| |
| ata_port_probe(ap); |
| |
| ata_link_for_each_dev(dev, &ap->link) |
| tries[dev->devno] = ATA_PROBE_MAX_TRIES; |
| |
| retry: |
| ata_link_for_each_dev(dev, &ap->link) { |
| /* If we issue an SRST then an ATA drive (not ATAPI) |
| * may change configuration and be in PIO0 timing. If |
| * we do a hard reset (or are coming from power on) |
| * this is true for ATA or ATAPI. Until we've set a |
| * suitable controller mode we should not touch the |
| * bus as we may be talking too fast. |
| */ |
| dev->pio_mode = XFER_PIO_0; |
| |
| /* If the controller has a pio mode setup function |
| * then use it to set the chipset to rights. Don't |
| * touch the DMA setup as that will be dealt with when |
| * configuring devices. |
| */ |
| if (ap->ops->set_piomode) |
| ap->ops->set_piomode(ap, dev); |
| } |
| |
| /* reset and determine device classes */ |
| ap->ops->phy_reset(ap); |
| |
| ata_link_for_each_dev(dev, &ap->link) { |
| if (!(ap->flags & ATA_FLAG_DISABLED) && |
| dev->class != ATA_DEV_UNKNOWN) |
| classes[dev->devno] = dev->class; |
| else |
| classes[dev->devno] = ATA_DEV_NONE; |
| |
| dev->class = ATA_DEV_UNKNOWN; |
| } |
| |
| ata_port_probe(ap); |
| |
| /* read IDENTIFY page and configure devices. We have to do the identify |
| specific sequence bass-ackwards so that PDIAG- is released by |
| the slave device */ |
| |
| ata_link_for_each_dev_reverse(dev, &ap->link) { |
| if (tries[dev->devno]) |
| dev->class = classes[dev->devno]; |
| |
| if (!ata_dev_enabled(dev)) |
| continue; |
| |
| rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET, |
| dev->id); |
| if (rc) |
| goto fail; |
| } |
| |
| /* Now ask for the cable type as PDIAG- should have been released */ |
| if (ap->ops->cable_detect) |
| ap->cbl = ap->ops->cable_detect(ap); |
| |
| /* We may have SATA bridge glue hiding here irrespective of the |
| reported cable types and sensed types */ |
| ata_link_for_each_dev(dev, &ap->link) { |
| if (!ata_dev_enabled(dev)) |
| continue; |
| /* SATA drives indicate we have a bridge. We don't know which |
| end of the link the bridge is which is a problem */ |
| if (ata_id_is_sata(dev->id)) |
| ap->cbl = ATA_CBL_SATA; |
| } |
| |
| /* After the identify sequence we can now set up the devices. We do |
| this in the normal order so that the user doesn't get confused */ |
| |
| ata_link_for_each_dev(dev, &ap->link) { |
| if (!ata_dev_enabled(dev)) |
| continue; |
| |
| ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO; |
| rc = ata_dev_configure(dev); |
| ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO; |
| if (rc) |
| goto fail; |
| } |
| |
| /* configure transfer mode */ |
| rc = ata_set_mode(&ap->link, &dev); |
| if (rc) |
| goto fail; |
| |
| ata_link_for_each_dev(dev, &ap->link) |
| if (ata_dev_enabled(dev)) |
| return 0; |
| |
| /* no device present, disable port */ |
| ata_port_disable(ap); |
| return -ENODEV; |
| |
| fail: |
| tries[dev->devno]--; |
| |
| switch (rc) { |
| case -EINVAL: |
| /* eeek, something went very wrong, give up */ |
| tries[dev->devno] = 0; |
| break; |
| |
| case -ENODEV: |
| /* give it just one more chance */ |
| tries[dev->devno] = min(tries[dev->devno], 1); |
| case -EIO: |
| if (tries[dev->devno] == 1) { |
| /* This is the last chance, better to slow |
| * down than lose it. |
| */ |
| sata_down_spd_limit(&ap->link); |
| ata_down_xfermask_limit(dev, ATA_DNXFER_PIO); |
| } |
| } |
| |
| if (!tries[dev->devno]) |
| ata_dev_disable(dev); |
| |
| goto retry; |
| } |
| |
| /** |
| * ata_port_probe - Mark port as enabled |
| * @ap: Port for which we indicate enablement |
| * |
| * Modify @ap data structure such that the system |
| * thinks that the entire port is enabled. |
| * |
| * LOCKING: host lock, or some other form of |
| * serialization. |
| */ |
| |
| void ata_port_probe(struct ata_port *ap) |
| { |
| ap->flags &= ~ATA_FLAG_DISABLED; |
| } |
| |
| /** |
| * sata_print_link_status - Print SATA link status |
| * @link: SATA link to printk link status about |
| * |
| * This function prints link speed and status of a SATA link. |
| * |
| * LOCKING: |
| * None. |
| */ |
| void sata_print_link_status(struct ata_link *link) |
| { |
| u32 sstatus, scontrol, tmp; |
| |
| if (sata_scr_read(link, SCR_STATUS, &sstatus)) |
| return; |
| sata_scr_read(link, SCR_CONTROL, &scontrol); |
| |
| if (ata_link_online(link)) { |
| tmp = (sstatus >> 4) & 0xf; |
| ata_link_printk(link, KERN_INFO, |
| "SATA link up %s (SStatus %X SControl %X)\n", |
| sata_spd_string(tmp), sstatus, scontrol); |
| } else { |
| ata_link_printk(link, KERN_INFO, |
| "SATA link down (SStatus %X SControl %X)\n", |
| sstatus, scontrol); |
| } |
| } |
| |
| /** |
| * ata_dev_pair - return other device on cable |
| * @adev: device |
| * |
| * Obtain the other device on the same cable, or if none is |
| * present NULL is returned |
| */ |
| |
| struct ata_device *ata_dev_pair(struct ata_device *adev) |
| { |
| struct ata_link *link = adev->link; |
| struct ata_device *pair = &link->device[1 - adev->devno]; |
| if (!ata_dev_enabled(pair)) |
| return NULL; |
| return pair; |
| } |
| |
| /** |
| * ata_port_disable - Disable port. |
| * @ap: Port to be disabled. |
| * |
| * Modify @ap data structure such that the system |
| * thinks that the entire port is disabled, and should |
| * never attempt to probe or communicate with devices |
| * on this port. |
| * |
| * LOCKING: host lock, or some other form of |
| * serialization. |
| */ |
| |
| void ata_port_disable(struct ata_port *ap) |
| { |
| ap->link.device[0].class = ATA_DEV_NONE; |
| ap->link.device[1].class = ATA_DEV_NONE; |
| ap->flags |= ATA_FLAG_DISABLED; |
| } |
| |
| /** |
| * sata_down_spd_limit - adjust SATA spd limit downward |
| * @link: Link to adjust SATA spd limit for |
| * |
| * Adjust SATA spd limit of @link downward. Note that this |
| * function only adjusts the limit. The change must be applied |
| * using sata_set_spd(). |
| * |
| * LOCKING: |
| * Inherited from caller. |
| * |
| * RETURNS: |
| * 0 on success, negative errno on failure |
| */ |
| int sata_down_spd_limit(struct ata_link *link) |
| { |
| u32 sstatus, spd, mask; |
| int rc, highbit; |
| |
| if (!sata_scr_valid(link)) |
| return -EOPNOTSUPP; |
| |
| /* If SCR can be read, use it to determine the current SPD. |
| * If not, use cached value in link->sata_spd. |
| */ |
| rc = sata_scr_read(link, SCR_STATUS, &sstatus); |
| if (rc == 0) |
| spd = (sstatus >> 4) & 0xf; |
| else |
| spd = link->sata_spd; |
| |
| mask = link->sata_spd_limit; |
| if (mask <= 1) |
| return -EINVAL; |
| |
| /* unconditionally mask off the highest bit */ |
| highbit = fls(mask) - 1; |
| mask &= ~(1 << highbit); |
| |
| /* Mask off all speeds higher than or equal to the current |
| * one. Force 1.5Gbps if current SPD is not available. |
| */ |
| if (spd > 1) |
| mask &= (1 << (spd - 1)) - 1; |
| else |
| mask &= 1; |
| |
| /* were we already at the bottom? */ |
| if (!mask) |
| return -EINVAL; |
| |
| link->sata_spd_limit = mask; |
| |
| ata_link_printk(link, KERN_WARNING, "limiting SATA link speed to %s\n", |
| sata_spd_string(fls(mask))); |
| |
| return 0; |
| } |
| |
| static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol) |
| { |
| struct ata_link *host_link = &link->ap->link; |
| u32 limit, target, spd; |
| |
| limit = link->sata_spd_limit; |
| |
| /* Don't configure downstream link faster than upstream link. |
| * It doesn't speed up anything and some PMPs choke on such |
| * configuration. |
| */ |
| if (!ata_is_host_link(link) && host_link->sata_spd) |
| limit &= (1 << host_link->sata_spd) - 1; |
| |
| if (limit == UINT_MAX) |
| target = 0; |
| else |
| target = fls(limit); |
| |
| spd = (*scontrol >> 4) & 0xf; |
| *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4); |
| |
| return spd != target; |
| } |
| |
| /** |
| * sata_set_spd_needed - is SATA spd configuration needed |
| * @link: Link in question |
| * |
| * Test whether the spd limit in SControl matches |
| * @link->sata_spd_limit. This function is used to determine |
| * whether hardreset is necessary to apply SATA spd |
| * configuration. |
| * |
| * LOCKING: |
| * Inherited from caller. |
| * |
| * RETURNS: |
| * 1 if SATA spd configuration is needed, 0 otherwise. |
| */ |
| int sata_set_spd_needed(struct ata_link *link) |
| { |
| u32 scontrol; |
| |
| if (sata_scr_read(link, SCR_CONTROL, &scontrol)) |
| return 1; |
| |
| return __sata_set_spd_needed(link, &scontrol); |
| } |
| |
| /** |
| * sata_set_spd - set SATA spd according to spd limit |
| * @link: Link to set SATA spd for |
| * |
| * Set SATA spd of @link according to sata_spd_limit. |
| * |
| * LOCKING: |
| * Inherited from caller. |
| * |
| * RETURNS: |
| * 0 if spd doesn't need to be changed, 1 if spd has been |
| * changed. Negative errno if SCR registers are inaccessible. |
| */ |
| int sata_set_spd(struct ata_link *link) |
| { |
| u32 scontrol; |
| int rc; |
| |
| if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
| return rc; |
| |
| if (!__sata_set_spd_needed(link, &scontrol)) |
| return 0; |
| |
| if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
| return rc; |
| |
| return 1; |
| } |
| |
| /* |
| * This mode timing computation functionality is ported over from |
| * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik |
| */ |
| /* |
| * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds). |
| * These were taken from ATA/ATAPI-6 standard, rev 0a, except |
| * for UDMA6, which is currently supported only by Maxtor drives. |
| * |
| * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0. |
| */ |
| |
| static const struct ata_timing ata_timing[] = { |
| /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 }, */ |
| { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 }, |
| { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 }, |
| { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 }, |
| { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 }, |
| { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 }, |
| { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 100, 0 }, |
| { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 80, 0 }, |
| |
| { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 }, |
| { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 }, |
| { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 }, |
| |
| { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 }, |
| { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 }, |
| { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 }, |
| { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 100, 0 }, |
| { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 80, 0 }, |
| |
| /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, */ |
| { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 }, |
| { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 }, |
| { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 }, |
| { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 }, |
| { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 }, |
| { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 }, |
| { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 }, |
| |
| { 0xFF } |
| }; |
| |
| #define ENOUGH(v, unit) (((v)-1)/(unit)+1) |
| #define EZ(v, unit) ((v)?ENOUGH(v, unit):0) |
| |
| static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT) |
| { |
| q->setup = EZ(t->setup * 1000, T); |
| q->act8b = EZ(t->act8b * 1000, T); |
| q->rec8b = EZ(t->rec8b * 1000, T); |
| q->cyc8b = EZ(t->cyc8b * 1000, T); |
| q->active = EZ(t->active * 1000, T); |
| q->recover = EZ(t->recover * 1000, T); |
| q->cycle = EZ(t->cycle * 1000, T); |
| q->udma = EZ(t->udma * 1000, UT); |
| } |
| |
| void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b, |
| struct ata_timing *m, unsigned int what) |
| { |
| if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup); |
| if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b); |
| if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b); |
| if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b); |
| if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active); |
| if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover); |
| if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle); |
| if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma); |
| } |
| |
| const struct ata_timing *ata_timing_find_mode(u8 xfer_mode) |
| { |
| const struct ata_timing *t = ata_timing; |
| |
| while (xfer_mode > t->mode) |
| t++; |
| |
| if (xfer_mode == t->mode) |
| return t; |
| return NULL; |
| } |
| |
| int ata_timing_compute(struct ata_device *adev, unsigned short speed, |
| struct ata_timing *t, int T, int UT) |
| { |
| const struct ata_timing *s; |
| struct ata_timing p; |
| |
| /* |
| * Find the mode. |
| */ |
| |
| if (!(s = ata_timing_find_mode(speed))) |
| return -EINVAL; |
| |
| memcpy(t, s, sizeof(*s)); |
| |
| /* |
| * If the drive is an EIDE drive, it can tell us it needs extended |
| * PIO/MW_DMA cycle timing. |
| */ |
| |
| if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */ |
| memset(&p, 0, sizeof(p)); |
| if (speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) { |
| if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO]; |
| else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY]; |
| } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) { |
| p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN]; |
| } |
| ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B); |
| } |
| |
| /* |
| * Convert the timing to bus clock counts. |
| */ |
| |
| ata_timing_quantize(t, t, T, UT); |
| |
| /* |
| * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, |
| * S.M.A.R.T * and some other commands. We have to ensure that the |
| * DMA cycle timing is slower/equal than the fastest PIO timing. |
| */ |
| |
| if (speed > XFER_PIO_6) { |
| ata_timing_compute(adev, adev->pio_mode, &p, T, UT); |
| ata_timing_merge(&p, t, t, ATA_TIMING_ALL); |
| } |
| |
| /* |
| * Lengthen active & recovery time so that cycle time is correct. |
| */ |
| |
| if (t->act8b + t->rec8b < t->cyc8b) { |
| t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; |
| t->rec8b = t->cyc8b - t->act8b; |
| } |
| |
| if (t->active + t->recover < t->cycle) { |
| t->active += (t->cycle - (t->active + t->recover)) / 2; |
| t->recover = t->cycle - t->active; |
| } |
| |
| /* In a few cases quantisation may produce enough errors to |
| leave t->cycle too low for the sum of active and recovery |
| if so we must correct this */ |
| if (t->active + t->recover > t->cycle) |
| t->cycle = t->active + t->recover; |
| |
| return 0; |
| } |
| |
| /** |
| * ata_timing_cycle2mode - find xfer mode for the specified cycle duration |
| * @xfer_shift: ATA_SHIFT_* value for transfer type to examine. |
| * @cycle: cycle duration in ns |
| * |
| * Return matching xfer mode for @cycle. The returned mode is of |
| * the transfer type specified by @xfer_shift. If @cycle is too |
| * slow for @xfer_shift, 0xff is returned. If @cycle is faster |
| * than the fastest known mode, the fasted mode is returned. |
| * |
| * LOCKING: |
| * None. |
| * |
| * RETURNS: |
| * Matching xfer_mode, 0xff if no match found. |
| */ |
| u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle) |
| { |
| u8 base_mode = 0xff, last_mode = 0xff; |
| const struct ata_xfer_ent *ent; |
| const struct ata_timing *t; |
| |
| for (ent = ata_xfer_tbl; ent->shift >= 0; ent++) |
| if (ent->shift == xfer_shift) |
| base_mode = ent->base; |
| |
| for (t = ata_timing_find_mode(base_mode); |
| t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) { |
| unsigned short this_cycle; |
| |
| switch (xfer_shift) { |
| case ATA_SHIFT_PIO: |
| case ATA_SHIFT_MWDMA: |
| this_cycle = t->cycle; |
| break; |
| case ATA_SHIFT_UDMA: |
| this_cycle = t->udma; |
| break; |
| default: |
| return 0xff; |
| } |
| |
| if (cycle > this_cycle) |
| break; |
| |
| last_mode = t->mode; |
| } |
| |
| return last_mode; |
| } |
| |
| /** |
| * ata_down_xfermask_limit - adjust dev xfer masks downward |
| * @dev: Device to adjust xfer masks |
| * @sel: ATA_DNXFER_* selector |
| * |
| * Adjust xfer masks of @dev downward. Note that this function |
| * does not apply the change. Invoking ata_set_mode() afterwards |
| * will apply the limit. |
| * |
| * LOCKING: |
| * Inherited from caller. |
| * |
| * RETURNS: |
| * 0 on success, negative errno on failure |
| */ |
| int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel) |
| { |
| char buf[32]; |
| unsigned long orig_mask, xfer_mask; |
| unsigned long pio_mask, mwdma_mask, udma_mask; |
| int quiet, highbit; |
| |
| quiet = !!(sel & ATA_DNXFER_QUIET); |
| sel &= ~ATA_DNXFER_QUIET; |
| |
| xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask, |
| dev->mwdma_mask, |
| dev->udma_mask); |
| ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask); |
| |
| switch (sel) { |
| case ATA_DNXFER_PIO: |
| highbit = fls(pio_mask) - 1; |
| pio_mask &= ~(1 << highbit); |
| break; |
| |
| case ATA_DNXFER_DMA: |
| if (udma_mask) { |
| highbit = fls(udma_mask) - 1; |
| udma_mask &= ~(1 << highbit); |
| if (!udma_mask) |
| return -ENOENT; |
| } else if (mwdma_mask) { |
| highbit = fls(mwdma_mask) - 1; |
| mwdma_mask &= ~(1 << highbit); |
| if (!mwdma_mask) |
| return -ENOENT; |
| } |
| break; |
| |
| case ATA_DNXFER_40C: |
| udma_mask &= ATA_UDMA_MASK_40C; |
| break; |
| |
| case ATA_DNXFER_FORCE_PIO0: |
| pio_mask &= 1; |
| case ATA_DNXFER_FORCE_PIO: |
| mwdma_mask = 0; |
| udma_mask = 0; |
| break; |
| |
| default: |
| BUG(); |
| } |
| |
| xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask); |
| |
| if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask) |
| return -ENOENT; |
| |
| if (!quiet) { |
| if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) |
| snprintf(buf, sizeof(buf), "%s:%s", |
| ata_mode_string(xfer_mask), |
| ata_mode_string(xfer_mask & ATA_MASK_PIO)); |
| else |
| snprintf(buf, sizeof(buf), "%s", |
| ata_mode_string(xfer_mask)); |
| |
| ata_dev_printk(dev, KERN_WARNING, |
| "limiting speed to %s\n", buf); |
| } |
| |
| ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask, |
| &dev->udma_mask); |
| |
| return 0; |
| } |
| |
| static int ata_dev_set_mode(struct ata_device *dev) |
| { |
| struct ata_eh_context *ehc = &dev->link->eh_context; |
| const char *dev_err_whine = ""; |
| int ign_dev_err = 0; |
| unsigned int err_mask; |
| int rc; |
| |
| dev->flags &= ~ATA_DFLAG_PIO; |
| if (dev->xfer_shift == ATA_SHIFT_PIO) |
| dev->flags |= ATA_DFLAG_PIO; |
| |
| err_mask = ata_dev_set_xfermode(dev); |
| |
| if (err_mask & ~AC_ERR_DEV) |
| goto fail; |
| |
| /* revalidate */ |
| ehc->i.flags |= ATA_EHI_POST_SETMODE; |
| rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0); |
| ehc->i.flags &= ~ATA_EHI_POST_SETMODE; |
| if (rc) |
| return rc; |
| |
| /* Old CFA may refuse this command, which is just fine */ |
| if (dev->xfer_shift == ATA_SHIFT_PIO && ata_id_is_cfa(dev->id)) |
| ign_dev_err = 1; |
| |
| /* Some very old devices and some bad newer ones fail any kind of |
| SET_XFERMODE request but support PIO0-2 timings and no IORDY */ |
| if (dev->xfer_shift == ATA_SHIFT_PIO && !ata_id_has_iordy(dev->id) && |
| dev->pio_mode <= XFER_PIO_2) |
| ign_dev_err = 1; |
| |
| /* Early MWDMA devices do DMA but don't allow DMA mode setting. |
| Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */ |
| if (dev->xfer_shift == ATA_SHIFT_MWDMA && |
| dev->dma_mode == XFER_MW_DMA_0 && |
| (dev->id[63] >> 8) & 1) |
| ign_dev_err = 1; |
| |
| /* if the device is actually configured correctly, ignore dev err */ |
| if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id))) |
| ign_dev_err = 1; |
| |
| if (err_mask & AC_ERR_DEV) { |
| if (!ign_dev_err) |
| goto fail; |
| else |
| dev_err_whine = " (device error ignored)"; |
| } |
| |
| DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n", |
| dev->xfer_shift, (int)dev->xfer_mode); |
| |
| ata_dev_printk(dev, KERN_INFO, "configured for %s%s\n", |
| ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)), |
| dev_err_whine); |
| |
| return 0; |
| |
| fail: |
| ata_dev_printk(dev, KERN_ERR, "failed to set xfermode " |
| "(err_mask=0x%x)\n", err_mask); |
| return -EIO; |
| } |
| |
| /** |
| * ata_do_set_mode - Program timings and issue SET FEATURES - XFER |
| * @link: link on which timings will be programmed |
| * @r_failed_dev: out parameter for failed device |
| * |
| * Standard implementation of the function used to tune and set |
| * ATA device disk transfer mode (PIO3, UDMA6, etc.). If |
| * ata_dev_set_mode() fails, pointer to the failing device is |
| * returned in @r_failed_dev. |
| * |
| * LOCKING: |
| * PCI/etc. bus probe sem. |
| * |
| * RETURNS: |
| * 0 on success, negative errno otherwise |
| */ |
| |
| int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev) |
| { |
| struct ata_port *ap = link->ap; |
| struct ata_device *dev; |
| int rc = 0, used_dma = 0, found = 0; |
| |
| /* step 1: calculate xfer_mask */ |
| ata_link_for_each_dev(dev, link) { |
| unsigned long pio_mask, dma_mask; |
| unsigned int mode_mask; |
| |
| if (!ata_dev_enabled(dev)) |
| continue; |
| |
| mode_mask = ATA_DMA_MASK_ATA; |
| if (dev->class == ATA_DEV_ATAPI) |
| mode_mask = ATA_DMA_MASK_ATAPI; |
| else if (ata_id_is_cfa(dev->id)) |
| mode_mask = ATA_DMA_MASK_CFA; |
| |
| ata_dev_xfermask(dev); |
| ata_force_xfermask(dev); |
| |
| pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0); |
| dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); |
| |
| if (libata_dma_mask & mode_mask) |
| dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask); |
| else |
| dma_mask = 0; |
| |
| dev->pio_mode = ata_xfer_mask2mode(pio_mask); |
| dev->dma_mode = ata_xfer_mask2mode(dma_mask); |
| |
| found = 1; |
| if (dev->dma_mode != 0xff) |
| used_dma = 1; |
| } |
| if (!found) |
| goto out; |
| |
| /* step 2: always set host PIO timings */ |
| ata_link_for_each_dev(dev, link) { |
| if (!ata_dev_enabled(dev)) |
| continue; |
| |
| if (dev->pio_mode == 0xff) { |
| ata_dev_printk(dev, KERN_WARNING, "no PIO support\n"); |
| rc = -EINVAL; |
| goto out; |
| } |
| |
| dev->xfer_mode = dev->pio_mode; |
| dev->xfer_shift = ATA_SHIFT_PIO; |
| if (ap->ops->set_piomode) |
| ap->ops->set_piomode(ap, dev); |
| } |
| |
| /* step 3: set host DMA timings */ |
| ata_link_for_each_dev(dev, link) { |
| if (!ata_dev_enabled(dev) || dev->dma_mode == 0xff) |
| continue; |
| |
| dev->xfer_mode = dev->dma_mode; |
| dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode); |
| if (ap->ops->set_dmamode) |
| ap->ops->set_dmamode(ap, dev); |
| } |
| |
| /* step 4: update devices' xfer mode */ |
| ata_link_for_each_dev(dev, link) { |
| /* don't update suspended devices' xfer mode */ |
| if (!ata_dev_enabled(dev)) |
| continue; |
| |
| rc = ata_dev_set_mode(dev); |
| if (rc) |
| goto out; |
| } |
| |
| /* Record simplex status. If we selected DMA then the other |
| * host channels are not permitted to do so. |
| */ |
| if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX)) |
| ap->host->simplex_claimed = ap; |
| |
| out: |
| if (rc) |
| *r_failed_dev = dev; |
| return rc; |
| } |
| |
| /** |
| * sata_link_debounce - debounce SATA phy status |
| * @link: ATA link to debounce SATA phy status for |
| * @params: timing parameters { interval, duratinon, timeout } in msec |
| * @deadline: deadline jiffies for the operation |
| * |
| * Make sure SStatus of @link reaches stable state, determined by |
| * holding the same value where DET is not 1 for @duration polled |
| * every @interval, before @timeout. Timeout constraints the |
| * beginning of the stable state. Because DET gets stuck at 1 on |
| * some controllers after hot unplugging, this functions waits |
| * until timeout then returns 0 if DET is stable at 1. |
| * |
| * @timeout is further limited by @deadline. The sooner of the |
| * two is used. |
| * |
| * LOCKING: |
| * Kernel thread context (may sleep) |
| * |
| * RETURNS: |
| * 0 on success, -errno on failure. |
| */ |
| int sata_link_debounce(struct ata_link *link, const unsigned long *params, |
| unsigned long deadline) |
| { |
| unsigned long interval_msec = params[0]; |
| unsigned long duration = msecs_to_jiffies(params[1]); |
| unsigned long last_jiffies, t; |
| u32 last, cur; |
| int rc; |
| |
| t = jiffies + msecs_to_jiffies(params[2]); |
| if (time_before(t, deadline)) |
| deadline = t; |
| |
| if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) |
| return rc; |
| cur &= 0xf; |
| |
| last = cur; |
| last_jiffies = jiffies; |
| |
| while (1) { |
| msleep(interval_msec); |
| if ((rc = sata_scr_read(link, SCR_STATUS, &cur))) |
| return rc; |
| cur &= 0xf; |
| |
| /* DET stable? */ |
| if (cur == last) { |
| if (cur == 1 && time_before(jiffies, deadline)) |
| continue; |
| if (time_after(jiffies, last_jiffies + duration)) |
| return 0; |
| continue; |
| } |
| |
| /* unstable, start over */ |
| last = cur; |
| last_jiffies = jiffies; |
| |
| /* Check deadline. If debouncing failed, return |
| * -EPIPE to tell upper layer to lower link speed. |
| */ |
| if (time_after(jiffies, deadline)) |
| return -EPIPE; |
| } |
| } |
| |
| /** |
| * sata_link_resume - resume SATA link |
| * @link: ATA link to resume SATA |
| * @params: timing parameters { interval, duratinon, timeout } in msec |
| * @deadline: deadline jiffies for the operation |
| * |
| * Resume SATA phy @link and debounce it. |
| * |
| * LOCKING: |
| * Kernel thread context (may sleep) |
| * |
| * RETURNS: |
| * 0 on success, -errno on failure. |
| */ |
| int sata_link_resume(struct ata_link *link, const unsigned long *params, |
| unsigned long deadline) |
| { |
| u32 scontrol; |
| int rc; |
| |
| if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
| return rc; |
| |
| scontrol = (scontrol & 0x0f0) | 0x300; |
| |
| if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
| return rc; |
| |
| /* Some PHYs react badly if SStatus is pounded immediately |
| * after resuming. Delay 200ms before debouncing. |
| */ |
| msleep(200); |
| |
| return sata_link_debounce(link, params, deadline); |
| } |
| |
| /** |
| * ata_std_prereset - prepare for reset |
| * @link: ATA link to be reset |
| * @deadline: deadline jiffies for the operation |
| * |
| * @link is about to be reset. Initialize it. Failure from |
| * prereset makes libata abort whole reset sequence and give up |
| * that port, so prereset should be best-effort. It does its |
| * best to prepare for reset sequence but if things go wrong, it |
| * should just whine, not fail. |
| * |
| * LOCKING: |
| * Kernel thread context (may sleep) |
| * |
| * RETURNS: |
| * 0 on success, -errno otherwise. |
| */ |
| int ata_std_prereset(struct ata_link *link, unsigned long deadline) |
| { |
| struct ata_port *ap = link->ap; |
| struct ata_eh_context *ehc = &link->eh_context; |
| const unsigned long *timing = sata_ehc_deb_timing(ehc); |
| int rc; |
| |
| /* if we're about to do hardreset, nothing more to do */ |
| if (ehc->i.action & ATA_EH_HARDRESET) |
| return 0; |
| |
| /* if SATA, resume link */ |
| if (ap->flags & ATA_FLAG_SATA) { |
| rc = sata_link_resume(link, timing, deadline); |
| /* whine about phy resume failure but proceed */ |
| if (rc && rc != -EOPNOTSUPP) |
| ata_link_printk(link, KERN_WARNING, "failed to resume " |
| "link for reset (errno=%d)\n", rc); |
| } |
| |
| /* wait for !BSY if we don't know that no device is attached */ |
| if (!ata_link_offline(link)) { |
| rc = ata_wait_ready(ap, deadline); |
| if (rc && rc != -ENODEV) { |
| ata_link_printk(link, KERN_WARNING, "device not ready " |
| "(errno=%d), forcing hardreset\n", rc); |
| ehc->i.action |= ATA_EH_HARDRESET; |
| } |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * sata_link_hardreset - reset link via SATA phy reset |
| * @link: link to reset |
| * @timing: timing parameters { interval, duratinon, timeout } in msec |
| * @deadline: deadline jiffies for the operation |
| * |
| * SATA phy-reset @link using DET bits of SControl register. |
| * |
| * LOCKING: |
| * Kernel thread context (may sleep) |
| * |
| * RETURNS: |
| * 0 on success, -errno otherwise. |
| */ |
| int sata_link_hardreset(struct ata_link *link, const unsigned long *timing, |
| unsigned long deadline) |
| { |
| u32 scontrol; |
| int rc; |
| |
| DPRINTK("ENTER\n"); |
| |
| if (sata_set_spd_needed(link)) { |
| /* SATA spec says nothing about how to reconfigure |
| * spd. To be on the safe side, turn off phy during |
| * reconfiguration. This works for at least ICH7 AHCI |
| * and Sil3124. |
| */ |
| if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
| goto out; |
| |
| scontrol = (scontrol & 0x0f0) | 0x304; |
| |
| if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol))) |
| goto out; |
| |
| sata_set_spd(link); |
| } |
| |
| /* issue phy wake/reset */ |
| if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol))) |
| goto out; |
| |
| scontrol = (scontrol & 0x0f0) | 0x301; |
| |
| if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol))) |
| goto out; |
| |
| /* Couldn't find anything in SATA I/II specs, but AHCI-1.1 |
| * 10.4.2 says at least 1 ms. |
| */ |
| msleep(1); |
| |
| /* bring link back */ |
| rc = sata_link_resume(link, timing, deadline); |
| out: |
| DPRINTK("EXIT, rc=%d\n", rc); |
| return rc; |
| } |
| |
| /** |
| * ata_std_postreset - standard postreset callback |
| * @link: the target ata_link |
| * @classes: classes of attached devices |
| * |
| * This function is invoked after a successful reset. Note that |
| * the device might have been reset more than once using |
| * different reset methods before postreset is invoked. |
| * |
| * LOCKING: |
| * Kernel thread context (may sleep) |
| */ |
| void ata_std_postreset(struct ata_link *link, unsigned int *classes) |
| { |
| struct ata_port *ap = link->ap; |
| u32 serror; |
| |
| DPRINTK("ENTER\n"); |
| |
| /* print link status */ |
| sata_print_link_status(link); |
| |
| /* clear SError */ |
| if (sata_scr_read(link, SCR_ERROR, &serror) == 0) |
| sata_scr_write(link, SCR_ERROR, serror); |
| link->eh_info.serror = 0; |
| |
| /* is double-select really necessary? */ |
| if (classes[0] != ATA_DEV_NONE) |
| ap->ops->dev_select(ap, 1); |
| if (classes[1] != ATA_DEV_NONE) |
| ap->ops->dev_select(ap, 0); |
| |
| /* bail out if no device is present */ |
| if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) { |
| DPRINTK("EXIT, no device\n"); |
| return; |
| } |
| |
| /* set up device control */ |
| if (ap->ioaddr.ctl_addr) |
| iowrite8(ap->ctl, ap->ioaddr.ctl_addr); |
| |
| DPRINTK("EXIT\n"); |
| } |
| |
| /** |
| * ata_dev_same_device - Determine whether new ID matches configured device |
| * @dev: device to compare against |
| * @new_class: class of the new device |
| * @new_id: IDENTIFY page of the new device |
| * |
| * Compare @new_class and @new_id against @dev and determine |
| * whether @dev is the device indicated by @new_class and |
| * @new_id. |
| * |
| * LOCKING: |
| * None. |
| * |
| * RETURNS: |
| * 1 if @dev matches @new_class and @new_id, 0 otherwise. |
| */ |
| static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class, |
| const u16 *new_id) |
| { |
| const u16 *old_id = dev->id; |
| unsigned char model[2][ATA_ID_PROD_LEN + 1]; |
| unsigned char serial[2][ATA_ID_SERNO_LEN + 1]; |
| |
| if (dev->class != new_class) { |
| ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n", |
| dev->class, new_class); |
| return 0; |
| } |
| |
| ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0])); |
| ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1])); |
| ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0])); |
| ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1])); |
| |
| if (strcmp(model[0], model[1])) { |
| ata_dev_printk(dev, KERN_INFO, "model number mismatch " |
| "'%s' != '%s'\n", model[0], model[1]); |
| return 0; |
| } |
| |
| if (strcmp(serial[0], serial[1])) { |
| ata_dev_printk(dev, KERN_INFO, "serial number mismatch " |
| "'%s' != '%s'\n", serial[0], serial[1]); |
| return 0; |
| } |
| |
| return 1; |
| } |
| |
| /** |
| * ata_dev_reread_id - Re-read IDENTIFY data |
| * @dev: target ATA device |
| * @readid_flags: read ID flags |
| * |
| * Re-read IDENTIFY page and make sure @dev is still attached to |
| * the port. |
| * |
| * LOCKING: |
| * Kernel thread context (may sleep) |
| * |
| * RETURNS: |
| * 0 on success, negative errno otherwise |
| */ |
| int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags) |
| { |
| unsigned int class = dev->class; |
| u16 *id = (void *)dev->link->ap->sector_buf; |
| int rc; |
| |
| /* read ID data */ |
| rc = ata_dev_read_id(dev, &class, readid_flags, id); |
| if (rc) |
| return rc; |
| |
| /* is the device still there? */ |
| if (!ata_dev_same_device(dev, class, id)) |
| return -ENODEV; |
| |
| memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS); |
| return 0; |
| } |
| |
| /** |
| * ata_dev_revalidate - Revalidate ATA device |
| * @dev: device to revalidate |
| * @new_class: new class code |
| * @readid_flags: read ID flags |
| * |
| * Re-read IDENTIFY page, make sure @dev is still attached to the |
| * port and reconfigure it according to the new IDENTIFY page. |
| * |
| * LOCKING: |
| * Kernel thread context (may sleep) |
| * |
| * RETURNS: |
| * 0 on success, negative errno otherwise |
| */ |
| int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class, |
| unsigned int readid_flags) |
| { |
| u64 n_sectors = dev->n_sectors; |
| int rc; |
| |
| if (!ata_dev_enabled(dev)) |
| return -ENODEV; |
| |
| /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */ |
| if (ata_class_enabled(new_class) && |
| new_class != ATA_DEV_ATA && new_class != ATA_DEV_ATAPI) { |
| ata_dev_printk(dev, KERN_INFO, "class mismatch %u != %u\n", |
| dev->class, new_class); |
| rc = -ENODEV; |
| goto fail; |
| } |
| |
| /* re-read ID */ |
| rc = ata_dev_reread_id(dev, readid_flags); |
| if (rc) |
| goto fail; |
| |
| /* configure device according to the new ID */ |
| rc = ata_dev_configure(dev); |
| if (rc) |
| goto fail; |
| |
| /* verify n_sectors hasn't changed */ |
| if (dev->class == ATA_DEV_ATA && n_sectors && |
| dev->n_sectors != n_sectors) { |
| ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch " |
| "%llu != %llu\n", |
| (unsigned long long)n_sectors, |
| (unsigned long long)dev->n_sectors); |
| |
| /* restore original n_sectors */ |
| dev->n_sectors = n_sectors; |
| |
| rc = -ENODEV; |
| goto fail; |
| } |
| |
| return 0; |
| |
| fail: |
| ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc); |
| return rc; |
| } |
| |
| struct ata_blacklist_entry { |
| const char *model_num; |
| const char *model_rev; |
| unsigned long horkage; |
| }; |
| |
| static const struct ata_blacklist_entry ata_device_blacklist [] = { |
| /* Devices with DMA related problems under Linux */ |
| { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA }, |
| { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA }, |
| { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA }, |
| { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA }, |
| { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA }, |
| { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA }, |
| { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA }, |
| { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA }, |
| { "CRD-8400B", NULL, ATA_HORKAGE_NODMA }, |
| { "CRD-8480B", NULL, ATA_HORKAGE_NODMA }, |
| { "CRD-8482B", NULL, ATA_HORKAGE_NODMA }, |
| { "CRD-84", NULL, ATA_HORKAGE_NODMA }, |
| { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA }, |
| { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA }, |
| { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA }, |
| { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA }, |
| { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA }, |
| { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA }, |
| { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA }, |
| { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA }, |
| { "CD-532E-A", NULL, ATA_HORKAGE_NODMA }, |
| { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA }, |
| { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA }, |
| { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA }, |
| { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA }, |
| { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA }, |
| { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA }, |
| { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA }, |
| { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA }, |
| { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA }, |
| /* Odd clown on sil3726/4726 PMPs */ |
| { "Config Disk", NULL, ATA_HORKAGE_NODMA | |
| ATA_HORKAGE_SKIP_PM }, |
| |
| /* Weird ATAPI devices */ |
| { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 }, |
| |
| /* Devices we expect to fail diagnostics */ |
| |
| /* Devices where NCQ should be avoided */ |
| /* NCQ is slow */ |
| { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ }, |
| { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, }, |
| /* http://thread.gmane.org/gmane.linux.ide/14907 */ |
| { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ }, |
| /* NCQ is broken */ |
| { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ }, |
| { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ }, |
| { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ }, |
| { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ }, |
| |
| /* Blacklist entries taken from Silicon Image 3124/3132 |
| Windows driver .inf file - also several Linux problem reports */ |
| { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, }, |
| { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, }, |
| { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, }, |
| |
| /* devices which puke on READ_NATIVE_MAX */ |
| { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, }, |
| { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA }, |
| { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA }, |
| { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA }, |
| |
| /* Devices which report 1 sector over size HPA */ |
| { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, }, |
| { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, }, |
| { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, }, |
| |
| /* Devices which get the IVB wrong */ |
| { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, }, |
| { "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB, }, |
| { "TSSTcorp CDDVDW SH-S202J", "SB01", ATA_HORKAGE_IVB, }, |
| { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB, }, |
| { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB, }, |
| |
| /* End Marker */ |
| { } |
| }; |
| |
| static int strn_pattern_cmp(const char *patt, const char *name, int wildchar) |
| { |
| const char *p; |
| int len; |
| |
| /* |
| * check for trailing wildcard: *\0 |
| */ |
| p = strchr(patt, wildchar); |
| if (p && ((*(p + 1)) == 0)) |
| len = p - patt; |
| else { |
| len = strlen(name); |
| if (!len) { |
| if (!*patt) |
| return 0; |
| return -1; |
| } |
| } |
| |
| return strncmp(patt, name, len); |
| } |
| |
| static unsigned long ata_dev_blacklisted(const struct ata_device *dev) |
| { |
| unsigned char model_num[ATA_ID_PROD_LEN + 1]; |
| unsigned char model_rev[ATA_ID_FW_REV_LEN + 1]; |
| const struct ata_blacklist_entry *ad = ata_device_blacklist; |
| |
| ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num)); |
| ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev)); |
| |
| while (ad->model_num) { |
| if (!strn_pattern_cmp(ad->model_num, model_num, '*')) { |
| if (ad->model_rev == NULL) |
| return ad->horkage; |
| if (!strn_pattern_cmp(ad->model_rev, model_rev, '*')) |
| return ad->horkage; |
| } |
| ad++; |
| } |
| return 0; |
| } |
| |
| static int ata_dma_blacklisted(const struct ata_device *dev) |
| { |
| /* We don't support polling DMA. |
| * DMA blacklist those ATAPI devices with CDB-intr (and use PIO) |
| * if the LLDD handles only interrupts in the HSM_ST_LAST state. |
| */ |
| if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) && |
| (dev->flags & ATA_DFLAG_CDB_INTR)) |
| return 1; |
| return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0; |
| } |
| |
| /** |
| * ata_is_40wire - check drive side detection |
| * @dev: device |
| * |
| * Perform drive side detection decoding, allowing for device vendors |
| * who can't follow the documentation. |
| */ |
| |
| static int ata_is_40wire(struct ata_device *dev) |
| { |
| if (dev->horkage & ATA_HORKAGE_IVB) |
| return ata_drive_40wire_relaxed(dev->id); |
| return ata_drive_40wire(dev->id); |
| } |
| |
| /** |
| * ata_dev_xfermask - Compute supported xfermask of the given device |
| * @dev: Device to compute xfermask for |
| * |
| * Compute supported xfermask of @dev and store it in |
| * dev->*_mask. This function is responsible for applying all |
| * known limits including host controller limits, device |
| * blacklist, etc... |
| * |
| * LOCKING: |
| * None. |
| */ |
| static void ata_dev_xfermask(struct ata_device *dev) |
| { |
| struct ata_link *link = dev->link; |
| struct ata_port *ap = link->ap; |
| struct ata_host *host = ap->host; |
| unsigned long xfer_mask; |
| |
| /* controller modes available */ |
| xfer_mask = ata_pack_xfermask(ap->pio_mask, |
| ap->mwdma_mask, ap->udma_mask); |
| |
| /* drive modes available */ |
| xfer_mask &= ata_pack_xfermask(dev->pio_mask, |
| dev->mwdma_mask, dev->udma_mask); |
| xfer_mask &= ata_id_xfermask(dev->id); |
| |
| /* |
| * CFA Advanced TrueIDE timings are not allowed on a shared |
| * cable |
| */ |
| if (ata_dev_pair(dev)) { |
| /* No PIO5 or PIO6 */ |
| xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5)); |
| /* No MWDMA3 or MWDMA 4 */ |
| xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3)); |
| } |
| |
| if (ata_dma_blacklisted(dev)) { |
| xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); |
| ata_dev_printk(dev, KERN_WARNING, |
| "device is on DMA blacklist, disabling DMA\n"); |
| } |
| |
| if ((host->flags & ATA_HOST_SIMPLEX) && |
| host->simplex_claimed && host->simplex_claimed != ap) { |
| xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); |
| ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by " |
| "other device, disabling DMA\n"); |
| } |
| |
| if (ap->flags & ATA_FLAG_NO_IORDY) |
| xfer_mask &= ata_pio_mask_no_iordy(dev); |
| |
| if (ap->ops->mode_filter) |
| xfer_mask = ap->ops->mode_filter(dev, xfer_mask); |
| |
| /* Apply cable rule here. Don't apply it early because when |
| * we handle hot plug the cable type can itself change. |
| * Check this last so that we know if the transfer rate was |
| * solely limited by the cable. |
| * Unknown or 80 wire cables reported host side are checked |
| * drive side as well. Cases where we know a 40wire cable |
| * is used safely for 80 are not checked here. |
| */ |
| if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA)) |
| /* UDMA/44 or higher would be available */ |
| if ((ap->cbl == ATA_CBL_PATA40) || |
| (ata_is_40wire(dev) && |
| (ap->cbl == ATA_CBL_PATA_UNK || |
| ap->cbl == ATA_CBL_PATA80))) { |
| ata_dev_printk(dev, KERN_WARNING, |
| "limited to UDMA/33 due to 40-wire cable\n"); |
| xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA); |
| } |
| |
| ata_unpack_xfermask(xfer_mask, &dev->pio_mask, |
| &dev->mwdma_mask, &dev->udma_mask); |
| } |
| |
| /** |
| * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command |
| * @dev: Device to which command will be sent |
| * |
| * Issue SET FEATURES - XFER MODE command to device @dev |
| * on port @ap. |
| * |
| * LOCKING: |
| * PCI/etc. bus probe sem. |
| * |
| * RETURNS: |
| * 0 on success, AC_ERR_* mask otherwise. |
| */ |
| |
| static unsigned int ata_dev_set_xfermode(struct ata_device *dev) |
| { |
| struct ata_taskfile tf; |
| unsigned int err_mask; |
| |
| /* set up set-features taskfile */ |
| DPRINTK("set features - xfer mode\n"); |
| |
| /* Some controllers and ATAPI devices show flaky interrupt |
| * behavior after setting xfer mode. Use polling instead. |
| */ |
| ata_tf_init(dev, &tf); |
| tf.command = ATA_CMD_SET_FEATURES; |
| tf.feature = SETFEATURES_XFER; |
| tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING; |
| tf.protocol = ATA_PROT_NODATA; |
| /* If we are using IORDY we must send the mode setting command */ |
| if (ata_pio_need_iordy(dev)) |
| tf.nsect = dev->xfer_mode; |
| /* If the device has IORDY and the controller does not - turn it off */ |
| else if (ata_id_has_iordy(dev->id)) |
| tf.nsect = 0x01; |
| else /* In the ancient relic department - skip all of this */ |
| return 0; |
| |
| err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
| |
| DPRINTK("EXIT, err_mask=%x\n", err_mask); |
| return err_mask; |
| } |
| /** |
| * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES |
| * @dev: Device to which command will be sent |
| * @enable: Whether to enable or disable the feature |
| * @feature: The sector count represents the feature to set |
| * |
| * Issue SET FEATURES - SATA FEATURES command to device @dev |
| * on port @ap with sector count |
| * |
| * LOCKING: |
| * PCI/etc. bus probe sem. |
| * |
| * RETURNS: |
| * 0 on success, AC_ERR_* mask otherwise. |
| */ |
| static unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable, |
| u8 feature) |
| { |
| struct ata_taskfile tf; |
| unsigned int err_mask; |
| |
| /* set up set-features taskfile */ |
| DPRINTK("set features - SATA features\n"); |
| |
| ata_tf_init(dev, &tf); |
| tf.command = ATA_CMD_SET_FEATURES; |
| tf.feature = enable; |
| tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| tf.protocol = ATA_PROT_NODATA; |
| tf.nsect = feature; |
| |
| err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
| |
| DPRINTK("EXIT, err_mask=%x\n", err_mask); |
| return err_mask; |
| } |
| |
| /** |
| * ata_dev_init_params - Issue INIT DEV PARAMS command |
| * @dev: Device to which command will be sent |
| * @heads: Number of heads (taskfile parameter) |
| * @sectors: Number of sectors (taskfile parameter) |
| * |
| * LOCKING: |
| * Kernel thread context (may sleep) |
| * |
| * RETURNS: |
| * 0 on success, AC_ERR_* mask otherwise. |
| */ |
| static unsigned int ata_dev_init_params(struct ata_device *dev, |
| u16 heads, u16 sectors) |
| { |
| struct ata_taskfile tf; |
| unsigned int err_mask; |
| |
| /* Number of sectors per track 1-255. Number of heads 1-16 */ |
| if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16) |
| return AC_ERR_INVALID; |
| |
| /* set up init dev params taskfile */ |
| DPRINTK("init dev params \n"); |
| |
| ata_tf_init(dev, &tf); |
| tf.command = ATA_CMD_INIT_DEV_PARAMS; |
| tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; |
| tf.protocol = ATA_PROT_NODATA; |
| tf.nsect = sectors; |
| tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */ |
| |
| err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); |
| /* A clean abort indicates an original or just out of spec drive |
| and we should continue as we issue the setup based on the |
| drive reported working geometry */ |
| if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED)) |
| err_mask = 0; |
| |
| DPRINTK("EXIT, err_mask=%x\n", err_mask); |
| return err_mask; |
| } |
| |
| /** |
| * ata_sg_clean - Unmap DMA memory associated with command |
| * @qc: Command containing DMA memory to be released |
| * |
| * Unmap all mapped DMA memory associated with this command. |
| * |
| * LOCKING: |
| * spin_lock_irqsave(host lock) |
| */ |
| void ata_sg_clean(struct ata_queued_cmd *qc) |
| { |
| struct ata_port *ap = qc->ap; |
| struct scatterlist *sg = qc->sg; |
| int dir = qc->dma_dir; |
| |
| WARN_ON(sg == NULL); |
| |
| VPRINTK("unmapping %u sg elements\n", qc->n_elem); |
| |
| if (qc->n_elem) |
| dma_unmap_sg(ap->dev, sg, qc->n_elem, dir); |
| |
| qc->flags &= ~ATA_QCFLAG_DMAMAP; |
| qc->sg = NULL; |
| } |
| |
| /** |
| * ata_check_atapi_dma - Check whether ATAPI DMA can be supported |
| * @qc: Metadata associated with taskfile to check |
| * |
| * Allow low-level driver to filter ATA PACKET commands, returning |
| * a status indicating whether or not it is OK to use DMA for the |
| * supplied PACKET command. |
| * |
| * LOCKING: |
| * spin_lock_irqsave(host lock) |
| * |
| * RETURNS: 0 when ATAPI DMA can be used |
| * nonzero otherwise |
| */ |
| int ata_check_atapi_dma(struct ata_queued_cmd *qc) |
| { |
| struct ata_port *ap = qc->ap; |
| |
| /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a |
| * few ATAPI devices choke on such DMA requests. |
| */ |
| if (unlikely(qc->nbytes & 15)) |
| return 1; |
| |
| if (ap->ops->check_atapi_dma) |
| return ap->ops->check_atapi_dma(qc); |
| |
| return 0; |
| } |
| |
| /** |
| * ata_std_qc_defer - Check whether a qc needs to be deferred |
| * @qc: ATA command in question |
| * |
| * Non-NCQ commands cannot run with any other command, NCQ or |
| * not. As upper layer only knows the queue depth, we are |
| * responsible for maintaining exclusion. This function checks |
| * whether a new command @qc can be issued. |
| * |
| * LOCKING: |
| * spin_lock_irqsave(host lock) |
| * |
| * RETURNS: |
| * ATA_DEFER_* if deferring is needed, 0 otherwise. |
| */ |
| int ata_std_qc_defer(struct ata_queued_cmd *qc) |
| { |
| struct ata_link *link = qc->dev->link; |
| |
| if (qc->tf.protocol == ATA_PROT_NCQ) { |
| if (!ata_tag_valid(link->active_tag)) |
| return 0; |
| } else { |
| if (!ata_tag_valid(link->active_tag) && !link->sactive) |
| return 0; |
| } |
| |
| return ATA_DEFER_LINK; |
| } |
| |
| void ata_noop_qc_prep(struct ata_queued_cmd *qc) { } |
| |
| /** |
| * ata_sg_init - Associate command with scatter-gather table. |
| * @qc: Command to be associated |
| * @sg: Scatter-gather table. |
| * @n_elem: Number of elements in s/g table. |
| * |
| * Initialize the data-related elements of queued_cmd @qc |
| * to point to a scatter-gather table @sg, containing @n_elem |
| * elements. |
| * |
| * LOCKING: |
| * spin_lock_irqsave(host lock) |
| */ |
| void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, |
| unsigned int n_elem) |
| { |
| qc->sg = sg; |
| qc->n_elem = n_elem; |
| qc->cursg = qc->sg; |
| } |
| |
| /** |
| * ata_sg_setup - DMA-map the scatter-gather table associated with a command. |
| * @qc: Command with scatter-gather table to be mapped. |
| * |
| * DMA-map the scatter-gather table associated with queued_cmd @qc. |
| * |
| * LOCKING: |
| * spin_lock_irqsave(host lock) |
| * |
| * RETURNS: |
| * Zero on success, negative on error. |
| * |
| */ |
| static int ata_sg_setup(struct ata_queued_cmd *qc) |
| { |
| struct ata_port *ap = qc->ap; |
| unsigned int n_elem; |
| |
| VPRINTK("ENTER, ata%u\n", ap->print_id); |
| |
| n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir); |
| if (n_elem < 1) |
| return -1; |
| |
| DPRINTK("%d sg elements mapped\n", n_elem); |
| |
| qc->n_elem = n_elem; |
| qc->flags |= ATA_QCFLAG_DMAMAP; |
| |
| return 0; |
| } |
| |
| /** |
| * swap_buf_le16 - swap halves of 16-bit words in place |
| * @buf: Buffer to swap |
| * @buf_words: Number of 16-bit words in buffer. |
| * |
| * Swap halves of 16-bit words if needed to convert from |
| * little-endian byte order to native cpu byte order, or |
| * vice-versa. |
| * |
| * LOCKING: |
| * Inherited from caller. |
| */ |
| void swap_buf_le16(u16 *buf, unsigned int buf_words) |
| { |
| #ifdef __BIG_ENDIAN |
| unsigned int i; |
| |
| for (i = 0; i < buf_words; i++) |
| buf[i] = le16_to_cpu(buf[i]); |
| #endif /* __BIG_ENDIAN */ |
| } |
| |
| /** |
| * ata_qc_new - Request an available ATA command, for queueing |
| * @ap: Port associated with device @dev |
| * @dev: Device from whom we request an available command structure |
| * |
| * LOCKING: |
| * None. |
| */ |
| |
| static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap) |
| { |
| struct ata_queued_cmd *qc = NULL; |
| unsigned int i; |
| |
| /* no command while frozen */ |
| if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) |
| return NULL; |
| |
| /* the last tag is reserved for internal command. */ |
| for (i = 0; i < ATA_MAX_QUEUE - 1; i++) |
| if (!test_and_set_bit(i, &ap->qc_allocated)) { |
| qc = __ata_qc_from_tag(ap, i); |
| break; |
| } |
| |
| if (qc) |
| qc->tag = i; |
| |
| return qc; |
| } |
| |
| /** |
| * ata_qc_new_init - Request an available ATA command, and initialize it |
| * @dev: Device from whom we request an available command structure |
| * |
| * LOCKING: |
| * None. |
| */ |
| |
| struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev) |
| { |
| struct ata_port *ap = dev->link->ap; |
| struct ata_queued_cmd *qc; |
| |
| qc = ata_qc_new(ap); |
| if (qc) { |
| qc->scsicmd = NULL; |
| qc->ap = ap; |
| qc->dev = dev; |
| |
| ata_qc_reinit(qc); |
| } |
| |
| return qc; |
| } |
| |
| /** |
| * ata_qc_free - free unused ata_queued_cmd |
| * @qc: Command to complete |
| * |
| * Designed to free unused ata_queued_cmd object |
| * in case something prevents using it. |
| * |
| * LOCKING: |
| * spin_lock_irqsave(host lock) |
| */ |
| void ata_qc_free(struct ata_queued_cmd *qc) |
| { |
| struct ata_port *ap = qc->ap; |
| unsigned int tag; |
| |
| WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
| |
| qc->flags = 0; |
| tag = qc->tag; |
| if (likely(ata_tag_valid(tag))) { |
| qc->tag = ATA_TAG_POISON; |
| clear_bit(tag, &ap->qc_allocated); |
| } |
| } |
| |
| void __ata_qc_complete(struct ata_queued_cmd *qc) |
| { |
| struct ata_port *ap = qc->ap; |
| struct ata_link *link = qc->dev->link; |
| |
| WARN_ON(qc == NULL); /* ata_qc_from_tag _might_ return NULL */ |
| WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE)); |
| |
| if (likely(qc->flags & ATA_QCFLAG_DMAMAP)) |
| ata_sg_clean(qc); |
| |
| /* command should be marked inactive atomically with qc completion */ |
| if (qc->tf.protocol == ATA_PROT_NCQ) { |
| link->sactive &= ~(1 << qc->tag); |
| if (!link->sactive) |
| ap->nr_active_links--; |
| } else { |
| link->active_tag = ATA_TAG_POISON; |
| ap->nr_active_links--; |
| } |
| |
| /* clear exclusive status */ |
| if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL && |
| ap->excl_link == link)) |
| ap->excl_link = NULL; |
| |
| /* atapi: mark qc as inactive to prevent the interrupt handler |
| * from completing the command twice later, before the error handler |
| * is called. (when rc != 0 and atapi request sense is needed) |
| */ |
| qc->flags &= ~ATA_QCFLAG_ACTIVE; |
| ap->qc_active &= ~(1 << qc->tag); |
| |
| /* call completion callback */ |
| qc->complete_fn(qc); |
| } |
| |
| static void fill_result_tf(struct ata_queued_cmd *qc) |
| { |
| struct ata_port *ap = qc->ap; |
| |
| qc->result_tf.flags = qc->tf.flags; |
| ap->ops->tf_read(ap, &qc->result_tf); |
| } |
| |
| static void ata_verify_xfer(struct ata_queued_cmd *qc) |
| { |
| struct ata_device *dev = qc->dev; |
| |
| if (ata_tag_internal(qc->tag)) |
| return; |
| |
| if (ata_is_nodata(qc->tf.protocol)) |
| return; |
| |
| if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol)) |
| return; |
| |
| dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER; |
| } |
| |
| /** |
| * ata_qc_complete - Complete an active ATA command |
| * @qc: Command to complete |
| * @err_mask: ATA Status register contents |
| * |
| * Indicate to the mid and upper layers that an ATA |
| * command has completed, with either an ok or not-ok status. |
| * |
| * LOCKING: |
| * spin_lock_irqsave(host lock) |
| */ |
| void ata_qc_complete(struct ata_queued_cmd *qc) |
| { |
| struct ata_port *ap = qc->ap; |
| |
| /* XXX: New EH and old EH use different mechanisms to |
| * synchronize EH with regular execution path. |
| * |
| * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED. |
| * Normal execution path is responsible for not accessing a |
| * failed qc. libata core enforces the rule by returning NULL |
| * from ata_qc_from_tag() for failed qcs. |
| * |
| * Old EH depends on ata_qc_complete() nullifying completion |
| * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does |
| * not synchronize with interrupt handler. Only PIO task is |
| * taken care of. |
| */ |
| if (ap->ops->error_handler) { |
| struct ata_device *dev = qc->dev; |
| struct ata_eh_info *ehi = &dev->link->eh_info; |
| |
| WARN_ON(ap->pflags & ATA_PFLAG_FROZEN); |
| |
| if (unlikely(qc->err_mask)) |
| qc->flags |= ATA_QCFLAG_FAILED; |
| |
| if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) { |
| if (!ata_tag_internal(qc->tag)) { |
| /* always fill result TF for failed qc */ |
| fill_result_tf(qc); |
| ata_qc_schedule_eh(qc); |
| return; |
| } |
| } |
| |
| /* read result TF if requested */ |
| if (qc->flags & ATA_QCFLAG_RESULT_TF) |
| fill_result_tf(qc); |
| |
| /* Some commands need post-processing after successful |
| * completion. |
| */ |
| switch (qc->tf.command) { |
| case ATA_CMD_SET_FEATURES: |
| if (qc->tf.feature != SETFEATURES_WC_ON && |
| qc->tf.feature != SETFEATURES_WC_OFF) |
| break; |
| /* fall through */ |
| case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */ |
| case ATA_CMD_SET_MULTI: /* multi_count changed */ |
| /* revalidate device */ |
| ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE; |
| ata_port_schedule_eh(ap); |
| break; |
| |
| case ATA_CMD_SLEEP: |
| dev->flags |= ATA_DFLAG_SLEEPING; |
| break; |
| } |
| |
| if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER)) |
| ata_verify_xfer(qc); |
| |
| __ata_qc_complete(qc); |
| } else { |
| if (qc->flags & ATA_QCFLAG_EH_SCHEDULED) |
| return; |
| |
| /* read result TF if failed or requested */ |
| if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF) |
| fill_result_tf(qc); |
| |
| __ata_qc_complete(qc); |
| } |
| } |
| |
| /** |
| * ata_qc_complete_multiple - Complete multiple qcs successfully |
| * @ap: port in question |
| * @qc_active: new qc_active mask |
| * @finish_qc: LLDD callback invoked before completing a qc |
| * |
| * Complete in-flight commands. This functions is meant to be |
| * called from low-level driver's interrupt routine to complete |
| * requests normally. ap->qc_active and @qc_active is compared |
| * and commands are completed accordingly. |
| * |
| * LOCKING: |
| * spin_lock_irqsave(host lock) |
| * |
| * RETURNS: |
| * Number of completed commands on success, -errno otherwise. |
| */ |
| int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, |
| void (*finish_qc)(struct ata_queued_cmd *)) |
| { |
| int nr_done = 0; |
| u32 done_mask; |
| int i; |
| |
| done_mask = ap->qc_active ^ qc_active; |
| |
| if (unlikely(done_mask & qc_active)) { |
| ata_port_printk(ap, KERN_ERR, "illegal qc_active transition " |
| "(%08x->%08x)\n", ap->qc_active, qc_active); |
| return -EINVAL; |
| } |
| |
| for (i = 0; i < ATA_MAX_QUEUE; i++) { |
| struct ata_queued_cmd *qc; |
| |
| if (!(done_mask & (1 << i))) |
| continue; |
| |
| if ((qc = ata_qc_from_tag(ap, i))) { |
| if (finish_qc) |
| finish_qc(qc); |
| ata_qc_complete(qc); |
| nr_done++; |
| } |
| } |
| |
| return nr_done; |
| } |
| |
| /** |
| * ata_qc_issue - issue taskfile to device |
| * @qc: command to issue to device |
| * |
| * Prepare an ATA command to submission to device. |
| * This includes mapping the data into a DMA-able |
| * area, filling in the S/G table, and finally |
| * writing the taskfile to hardware, starting the command. |
| * |
| * LOCKING: |
| * spin_lock_irqsave(host lock) |
| */ |
| void ata_qc_issue(struct ata_queued_cmd *qc) |
| { |
| struct ata_port *ap = qc->ap; |
| struct ata_link *link = qc->dev->link; |
| u8 prot = qc->tf.protocol; |
| |
| /* Make sure only one non-NCQ command is outstanding. The |
| * check is skipped for old EH because it reuses active qc to |
| * request ATAPI sense. |
| */ |
| WARN_ON(ap->ops->error_handler && ata_tag_valid(link->active_tag)); |
| |
| if (ata_is_ncq(prot)) { |
| WARN_ON(link->sactive & (1 << qc->tag)); |
| |
| if (!link->sactive) |
| ap->nr_active_links++; |
| link->sactive |= 1 << qc->tag; |
| } else { |
| WARN_ON(link->sactive); |
| |
| ap->nr_active_links++; |
| link->active_tag = qc->tag; |
| } |
| |
| qc->flags |= ATA_QCFLAG_ACTIVE; |
| ap->qc_active |= 1 << qc->tag; |
| |
| /* We guarantee to LLDs that they will have at least one |
| * non-zero sg if the command is a data command. |
| */ |
| BUG_ON(ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes)); |
| |
| if (ata_is_dma(prot) || (ata_is_pio(prot) && |
| (ap->flags & ATA_FLAG_PIO_DMA))) |
| if (ata_sg_setup(qc)) |
| goto sg_err; |
| |
| /* if device is sleeping, schedule reset and abort the link */ |
| if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) { |
| link->eh_info.action |= ATA_EH_RESET; |
| ata_ehi_push_desc(&link->eh_info, "waking up from sleep"); |
| ata_link_abort(link); |
| return; |
| } |
| |
| ap->ops->qc_prep(qc); |
| |
| qc->err_mask |= ap->ops->qc_issue(qc); |
| if (unlikely(qc->err_mask)) |
| goto err; |
| return; |
| |
| sg_err: |
| qc->err_mask |= AC_ERR_SYSTEM; |
| err: |
| ata_qc_complete(qc); |
| } |
| |
| /** |
| * sata_scr_valid - test whether SCRs are accessible |
| * @link: ATA link to test SCR accessibility for |
| * |
| * Test whether SCRs are accessible for @link. |
| * |
| * LOCKING: |
| * None. |
| * |
| * RETURNS: |
| * 1 if SCRs are accessible, 0 otherwise. |
| */ |
| int sata_scr_valid(struct ata_link *link) |
| { |
| struct ata_port *ap = link->ap; |
| |
| return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read; |
| } |
| |
| /** |
| * sata_scr_read - read SCR register of the specified port |
| * @link: ATA link to read SCR for |
| * @reg: SCR to read |
| * @val: Place to store read value |
| * |
| * Read SCR register @reg of @link into *@val. This function is |
| * guaranteed to succeed if @link is ap->link, the cable type of |
| * the port is SATA and the port implements ->scr_read. |
| * |
| * LOCKING: |
| * None if @link is ap->link. Kernel thread context otherwise. |
| * |
| * RETURNS: |
| * 0 on success, negative errno on failure. |
| */ |
| int sata_scr_read(struct ata_link *link, int reg, u32 *val) |
| { |
| if (ata_is_host_link(link)) { |
| struct ata_port *ap = link->ap; |
| |
| if (sata_scr_valid(link)) |
| return ap->ops->scr_read(ap, reg, val); |
| return -EOPNOTSUPP; |
| } |
| |
| return sata_pmp_scr_read(link, reg, val); |
| } |
| |
| /** |
| * sata_scr_write - write SCR register of the specified port |
| * @link: ATA link to write SCR for |
| * @reg: SCR to write |
| * @val: value to write |
| * |
| * Write @val to SCR register @reg of @link. This function is |
| * guaranteed to succeed if @link is ap->link, the cable type of |
| * the port is SATA and the port implements ->scr_read. |
| * |
| * LOCKING: |
| * None if @link is ap->link. Kernel thread context otherwise. |
| * |
| * RETURNS: |
| * 0 on success, negative errno on failure. |
| */ |
| int sata_scr_write(struct ata_link *link, int reg, u32 val) |
| { |
| if (ata_is_host_link(link)) { |
| struct ata_port *ap = link->ap; |
| |
| if (sata_scr_valid(link)) |
| return ap->ops->scr_write(ap, reg, val); |
| return -EOPNOTSUPP; |
| } |
| |
| return sata_pmp_scr_write(link, reg, val); |
| } |
| |
| /** |
| * sata_scr_write_flush - write SCR register of the specified port and flush |
| * @link: ATA link to write SCR for |
| * @reg: SCR to write |
| * @val: value to write |
| * |
| * This function is identical to sata_scr_write() except that this |
| * function performs flush after writing to the register. |
| * |
| * LOCKING: |
| * None if @link is ap->link. Kernel thread context otherwise. |
| * |
| * RETURNS: |
| * 0 on success, negative errno on failure. |
| */ |
| int sata_scr_write_flush(struct ata_link *link, int reg, u32 val) |
| { |
| if (ata_is_host_link(link)) { |
| struct ata_port *ap = link->ap; |
| int rc; |
| |
| if (sata_scr_valid(link)) { |
| rc = ap->ops->scr_write(ap, reg, val); |
| if (rc == 0) |
| rc = ap->ops->scr_read(ap, reg, &val); |
| return rc; |
| } |
| return -EOPNOTSUPP; |
| } |
| |
| return sata_pmp_scr_write(link, reg, val); |
| } |
| |
| /** |
| * ata_link_online - test whether the given link is online |
| * @link: ATA link to test |
| * |
| * Test whether @link is online. Note that this function returns |
| * 0 if online status of @link cannot be obtained, so |
| * ata_link_online(link) != !ata_link_offline(link). |
| * |
| * LOCKING: |
| * None. |
| * |
| * RETURNS: |
| * 1 if the port online status is available and online. |
| */ |
| int ata_link_online(struct ata_link *link) |
| { |
| u32 sstatus; |
| |
| if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && |
| (sstatus & 0xf) == 0x3) |
| return 1; |
| return 0; |
| } |
| |
| /** |
| * ata_link_offline - test whether the given link is offline |
| * @link: ATA link to test |
| * |
| * Test whether @link is offline. Note that this function |
| * returns 0 if offline status of @link cannot be obtained, so |
| * ata_link_online(link) != !ata_link_offline(link). |
| * |
| * LOCKING: |
| * None. |
| * |
| * RETURNS: |
| * 1 if the port offline status is available and offline. |
| */ |
| int ata_link_offline(struct ata_link *link) |
| { |
| u32 sstatus; |
| |
| if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 && |
| (sstatus & 0xf) != 0x3) |
| return 1; |
| return 0; |
| } |
| |
| int ata_flush_cache(struct ata_device *dev) |
| { |
| unsigned int err_mask; |
| u8 cmd; |
| |
| if (!ata_try_flush_cache(dev)) |
| return 0; |
| |
| if (dev->flags & ATA_DFLAG_FLUSH_EXT) |
| cmd = ATA_CMD_FLUSH_EXT; |
| else |
| cmd = ATA_CMD_FLUSH; |
| |
| /* This is wrong. On a failed flush we get back the LBA of the lost |
| sector and we should (assuming it wasn't aborted as unknown) issue |
| a further flush command to continue the writeback until it |
| does not error */ |
| err_mask = ata_do_simple_cmd(dev, cmd); |
| if (err_mask) { |
| ata_dev_printk(dev, KERN_ERR, "failed to flush cache\n"); |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_PM |
| static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg, |
| unsigned int action, unsigned int ehi_flags, |
| int wait) |
| { |
| unsigned long flags; |
| int i, rc; |
| |
| for (i = 0; i < host->n_ports; i++) { |
| struct ata_port *ap = host->ports[i]; |
| struct ata_link *link; |
| |
| /* Previous resume operation might still be in |
| * progress. Wait for PM_PENDING to clear. |
| */ |
| if (ap->pflags & ATA_PFLAG_PM_PENDING) { |
| ata_port_wait_eh(ap); |
| WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); |
| } |
| |
| /* request PM ops to EH */ |
| spin_lock_irqsave(ap->lock, flags); |
| |
| ap->pm_mesg = mesg; |
| if (wait) { |
| rc = 0; |
| ap->pm_result = &rc; |
| } |
| |
| ap->pflags |= ATA_PFLAG_PM_PENDING; |
| __ata_port_for_each_link(link, ap) { |
| link->eh_info.action |= action; |
| link->eh_info.flags |= ehi_flags; |
| } |
| |
| ata_port_schedule_eh(ap); |
| |
| spin_unlock_irqrestore(ap->lock, flags); |
| |
| /* wait and check result */ |
| if (wait) { |
| ata_port_wait_eh(ap); |
| WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); |
| if (rc) |
| return rc; |
| } |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * ata_host_suspend - suspend host |
| * @host: host to suspend |
| * @mesg: PM message |
| * |
| * Suspend @host. Actual operation is performed by EH. This |
| * function requests EH to perform PM operations and waits for EH |
| * to finish. |
| * |
| * LOCKING: |
| * Kernel thread context (may sleep). |
| * |
| * RETURNS: |
| * 0 on success, -errno on failure. |
| */ |
| int ata_host_suspend(struct ata_host *host, pm_message_t mesg) |
| { |
| int rc; |
| |
| /* |
| * disable link pm on all ports before requesting |
| * any pm activity |
| */ |
| ata_lpm_enable(host); |
| |
| rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1); |
| if (rc == 0) |
| host->dev->power.power_state = mesg; |
| return rc; |
| } |
| |
| /** |
| * ata_host_resume - resume host |
| * @host: host to resume |
| * |
| * Resume @host. Actual operation is performed by EH. This |
| * function requests EH to perform PM operations and returns. |
| * Note that all resume operations are performed parallely. |
| * |
| * LOCKING: |
| * Kernel thread context (may sleep). |
| */ |
| void ata_host_resume(struct ata_host *host) |
| { |
| ata_host_request_pm(host, PMSG_ON, ATA_EH_RESET, |
| ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0); |
| host->dev->power.power_state = PMSG_ON; |
| |
| /* reenable link pm */ |
| ata_lpm_disable(host); |
| } |
| #endif |
| |
| /** |
| * ata_port_start - Set port up for dma. |
| * @ap: Port to initialize |
| * |
| * Called just after data structures for each port are |
| * initialized. Allocates space for PRD table. |
| * |
| * May be used as the port_start() entry in ata_port_operations. |
| * |
| * LOCKING: |
| * Inherited from caller. |
| */ |
| int ata_port_start(struct ata_port *ap) |
| { |
| struct device *dev = ap->dev; |
| |
| ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, |
| GFP_KERNEL); |
| if (!ap->prd) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| /** |
| * ata_dev_init - Initialize an ata_device structure |
| * @dev: Device structure to initialize |
| * |
| * Initialize @dev in preparation for probing. |
| * |
| * LOCKING: |
| * Inherited from caller. |
| */ |
| void ata_dev_init(struct ata_device *dev) |
| { |
| struct ata_link *link = dev->link; |
| struct ata_port *ap = link->ap; |
| unsigned long flags; |
| |
| /* SATA spd limit is bound to the first device */ |
| link->sata_spd_limit = link->hw_sata_spd_limit; |
| link->sata_spd = 0; |
| |
| /* High bits of dev->flags are used to record warm plug |
| * requests which occur asynchronously. Synchronize using |
| * host lock. |
| */ |
| spin_lock_irqsave(ap->lock, flags); |
| dev->flags &= ~ATA_DFLAG_INIT_MASK; |
| dev->horkage = 0; |
| spin_unlock_irqrestore(ap->lock, flags); |
| |
| memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0, |
| sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET); |
| dev->pio_mask = UINT_MAX; |
| dev->mwdma_mask = UINT_MAX; |
| dev->udma_mask = UINT_MAX; |
| } |
| |
| /** |
| * ata_link_init - Initialize an ata_link structure |
| * @ap: ATA port link is attached to |
| * @link: Link structure to initialize |
| * @pmp: Port multiplier port number |
| * |
| * Initialize @link. |
| * |
| * LOCKING: |
| * Kernel thread context (may sleep) |
| */ |
| void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp) |
| { |
| int i; |
| |
| /* clear everything except for devices */ |
| memset(link, 0, offsetof(struct ata_link, device[0])); |
| |
| link->ap = ap; |
| link->pmp = pmp; |
| link->active_tag = ATA_TAG_POISON; |
| link->hw_sata_spd_limit = UINT_MAX; |
| |
| /* can't use iterator, ap isn't initialized yet */ |
| for (i = 0; i < ATA_MAX_DEVICES; i++) { |
| struct ata_device *dev = &link->device[i]; |
| |
| dev->link = link; |
| dev->devno = dev - link->device; |
| ata_dev_init(dev); |
| } |
| } |
| |
| /** |
| * sata_link_init_spd - Initialize link->sata_spd_limit |
| * @link: Link to configure sata_spd_limit for |
| * |
| * Initialize @link->[hw_]sata_spd_limit to the currently |
| * configured value. |
| * |
| * LOCKING: |
| * Kernel thread context (may sleep). |
| * |
| * RETURNS: |
| * 0 on success, -errno on failure. |
| */ |
| int sata_link_init_spd(struct ata_link *link) |
| { |
| u32 scontrol; |
| u8 spd; |
| int rc; |
| |
| rc = sata_scr_read(link, SCR_CONTROL, &scontrol); |
| if (rc) |
| return rc; |
| |
| spd = (scontrol >> 4) & 0xf; |
| if (spd) |
| link->hw_sata_spd_limit &= (1 << spd) - 1; |
| |
| ata_force_spd_limit(link); |
| |
| link->sata_spd_limit = link->hw_sata_spd_limit; |
| |
| return 0; |
| } |
| |
| /** |
| * ata_port_alloc - allocate and initialize basic ATA port resources |
| * @host: ATA host this allocated port belongs to |
| * |
| * Allocate and initialize basic ATA port resources. |
| * |
| * RETURNS: |
| * Allocate ATA port on success, NULL on failure. |
| * |
| * LOCKING: |
| * Inherited from calling layer (may sleep). |
| */ |
| struct ata_port *ata_port_alloc(struct ata_host *host) |
| { |
| struct ata_port *ap; |
| |
| DPRINTK("ENTER\n"); |
| |
| ap = kzalloc(sizeof(*ap), GFP_KERNEL); |
| if (!ap) |
| return NULL; |
| |
| ap->pflags |= ATA_PFLAG_INITIALIZING; |
| ap->lock = &host->lock; |
| ap->flags = ATA_FLAG_DISABLED; |
| ap->print_id = -1; |
| ap->ctl = ATA_DEVCTL_OBS; |
| ap->host = host; |
| ap->dev = host->dev; |
| ap->last_ctl = 0xFF; |
| |
| #if defined(ATA_VERBOSE_DEBUG) |
| /* turn on all debugging levels */ |
| ap->msg_enable = 0x00FF; |
| #elif defined(ATA_DEBUG) |
| ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR; |
| #else |
| ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN; |
| #endif |
| |
| INIT_DELAYED_WORK(&ap->port_task, ata_pio_task); |
| INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug); |
| INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan); |
| INIT_LIST_HEAD(&ap->eh_done_q); |
| init_waitqueue_head(&ap->eh_wait_q); |
| init_timer_deferrable(&ap->fastdrain_timer); |
| ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn; |
| ap->fastdrain_timer.data = (unsigned long)ap; |
| |
| ap->cbl = ATA_CBL_NONE; |
| |
| ata_link_init(ap, &ap->link, 0); |
| |
| #ifdef ATA_IRQ_TRAP |
| ap->stats.unhandled_irq = 1; |
| ap->stats.idle_irq = 1; |
| #endif |
| return ap; |
| } |
| |
| static void ata_host_release(struct device *gendev, void *res) |
| { |
| struct ata_host *host = dev_get_drvdata(gendev); |
| int i; |
| |
| for (i = 0; i < host->n_ports; i++) { |
| struct ata_port *ap = host->ports[i]; |
| |
| if (!ap) |
| continue; |
| |
| if (ap->scsi_host) |
| scsi_host_put(ap->scsi_host); |
| |
| kfree(ap->pmp_link); |
| kfree(ap); |
| host->ports[i] = NULL; |
| } |
| |
| dev_set_drvdata(gendev, NULL); |
| } |
| |
| /** |
| * ata_host_alloc - allocate and init basic ATA host resources |
| * @dev: generic device this host is associated with |
| * @max_ports: maximum number of ATA ports associated with this host |
| * |
| * Allocate and initialize basic ATA host resources. LLD calls |
| * this function to allocate a host, initializes it fully and |
| * attaches it using ata_host_register(). |
| * |
| * @max_ports ports are allocated and host->n_ports is |
| * initialized to @max_ports. The caller is allowed to decrease |
| * host->n_ports before calling ata_host_register(). The unused |
| * ports will be automatically freed on registration. |
| * |
| * RETURNS: |
| * Allocate ATA host on success, NULL on failure. |
| * |
| * LOCKING: |
| * Inherited from calling layer (may sleep). |
| */ |
| struct ata_host *ata_host_alloc(struct device *dev, int max_ports) |
| { |
| struct ata_host *host; |
| size_t sz; |
| int i; |
| |
| DPRINTK("ENTER\n"); |
| |
| if (!devres_open_group(dev, NULL, GFP_KERNEL)) |
| return NULL; |
| |
| /* alloc a container for our list of ATA ports (buses) */ |
| sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *); |
| /* alloc a container for our list of ATA ports (buses) */ |
| host = devres_alloc(ata_host_release, sz, GFP_KERNEL); |
| if (!host) |
| goto err_out; |
| |
| devres_add(dev, host); |
| dev_set_drvdata(dev, host); |
| |
| spin_lock_init(&host->lock); |
| host->dev = dev; |
| host->n_ports = max_ports; |
| |
| /* allocate ports bound to this host */ |
| for (i = 0; i < max_ports; i++) { |
| struct ata_port *ap; |
| |
| ap = ata_port_alloc(host); |
| if (!ap) |
| goto err_out; |
| |
| ap->port_no = i; |
| host->ports[i] = ap; |
| } |
| |
| devres_remove_group(dev, NULL); |
| return host; |
| |
| err_out: |
| devres_release_group(dev, NULL); |
| return NULL; |
| } |
| |
| /** |
| * ata_host_alloc_pinfo - alloc host and init with port_info array |
| * @dev: generic device this host is associated with |
| * @ppi: array of ATA port_info to initialize host with |
| * @n_ports: number of ATA ports attached to this host |
| * |
| * Allocate ATA host and initialize with info from @ppi. If NULL |
| * terminated, @ppi may contain fewer entries than @n_ports. The |
| * last entry will be used for the remaining ports. |
| * |
| * RETURNS: |
| * Allocate ATA host on success, NULL on failure. |
| * |
| * LOCKING: |
| * Inherited from calling layer (may sleep). |
| */ |
| struct ata_host *ata_host_alloc_pinfo(struct device *dev, |
| const struct ata_port_info * const * ppi, |
| int n_ports) |
| { |
| const struct ata_port_info *pi; |
| struct ata_host *host; |
| int i, j; |
| |
| host = ata_host_alloc(dev, n_ports); |
| if (!host) |
| return NULL; |
| |
| for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) { |
| struct ata_port *ap = host->ports[i]; |
| |
| if (ppi[j]) |
| pi = ppi[j++]; |
| |
| ap->pio_mask = pi->pio_mask; |
| ap->mwdma_mask = pi->mwdma_mask; |
| ap->udma_mask = pi->udma_mask; |
| ap->flags |= pi->flags; |
| ap->link.flags |= pi->link_flags; |
| ap->ops = pi->port_ops; |
| |
| if (!host->ops && (pi->port_ops != &ata_dummy_port_ops)) |
| host->ops = pi->port_ops; |
| } |
| |
| return host; |
| } |
| |
| static void ata_host_stop(struct device *gendev, void *res) |
| { |
| struct ata_host *host = dev_get_drvdata(gendev); |
| int i; |
| |
| WARN_ON(!(host->flags & ATA_HOST_STARTED)); |
| |
| for (i = 0; i < host->n_ports; i++) { |
| struct ata_port *ap = host->ports[i]; |
| |
| if (ap->ops->port_stop) |
| ap->ops->port_stop(ap); |
| } |
| |
| if (host->ops->host_stop) |
| host->ops->host_stop(host); |
| } |
| |
| /** |
| * ata_finalize_port_ops - finalize ata_port_operations |
| * @ops: ata_port_operations to finalize |
| * |
| * An ata_port_operations can inherit from another ops and that |
| * ops can again inherit from another. This can go on as many |
| * times as necessary as long as there is no loop in the |
| * inheritance chain. |
| * |
| * Ops tables are finalized when the host is started. NULL or |
| * unspecified entries are inherited from the closet ancestor |
| * which has the method and the entry is populated with it. |
| * After finalization, the ops table directly points to all the |
| * methods and ->inherits is no longer necessary and cleared. |
| * |
| * Using ATA_OP_NULL, inheriting ops can force a method to NULL. |
| * |
| * LOCKING: |
| * None. |
| */ |
| static void ata_finalize_port_ops(struct ata_port_operations *ops) |
| { |
| static spinlock_t lock = SPIN_LOCK_UNLOCKED; |
| const struct ata_port_operations *cur; |
| void **begin = (void **)ops; |
| void **end = (void **)&ops->inherits; |
| void **pp; |
| |
| if (!ops || !ops->inherits) |
| return; |
| |
| spin_lock(&lock); |
| |
| for (cur = ops->inherits; cur; cur = cur->inherits) { |
| void **inherit = (void **)cur; |
| |
| for (pp = begin; pp < end; pp++, inherit++) |
| if (!*pp) |
| *pp = *inherit; |
| } |
| |
| for (pp = begin; pp < end; pp++) |
| if (IS_ERR(*pp)) |
| *pp = NULL; |
| |
| ops->inherits = NULL; |
| |
| spin_unlock(&lock); |
| } |
| |
| /** |
| * ata_host_start - start and freeze ports of an ATA host |
| * @host: ATA host to start ports for |
| * |
| * Start and then freeze ports of @host. Started status is |
| * recorded in host->flags, so this function can be called |
| * multiple times. Ports are guaranteed to get started only |
| * once. If host->ops isn't initialized yet, its set to the |
| * first non-dummy port ops. |
| * |
| * LOCKING: |
| * Inherited from calling layer (may sleep). |
| * |
| * RETURNS: |
| * 0 if all ports are started successfully, -errno otherwise. |
| */ |
| int ata_host_start(struct ata_host *host) |
| { |
| int have_stop = 0; |
| void *start_dr = NULL; |
| int i, rc; |
| |
| if (host->flags & ATA_HOST_STARTED) |
| return 0; |
| |
| ata_finalize_port_ops(host->ops); |
| |
| for (i = 0; i < host->n_ports; i++) { |
| struct ata_port *ap = host->ports[i]; |
| |
| ata_finalize_port_ops(ap->ops); |
| |
| if (!host->ops && !ata_port_is_dummy(ap)) |
| host->ops = ap->ops; |
| |
| if (ap->ops->port_stop) |
| have_stop = 1; |
| } |
| |
| if (host->ops->host_stop) |
| have_stop = 1; |
| |
| if (have_stop) { |
| start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL); |
| if (!start_dr) |
| return -ENOMEM; |
| } |
| |
| for (i = 0; i < host->n_ports; i++) { |
| struct ata_port *ap = host->ports[i]; |
| |
| if (ap->ops->port_start) { |
| rc = ap->ops->port_start(ap); |
| if (rc) { |
| if (rc != -ENODEV) |
| dev_printk(KERN_ERR, host->dev, |
| "failed to start port %d " |
| "(errno=%d)\n", i, rc); |
| goto err_out; |
| } |
| } |
| ata_eh_freeze_port(ap); |
| } |
| |
| if (start_dr) |
| devres_add(host->dev, start_dr); |
| host->flags |= ATA_HOST_STARTED; |
| return 0; |
| |
| err_out: |
| while (--i >= 0) { |
| struct ata_port *ap = host->ports[i]; |
| |
| if (ap->ops->port_stop) |
| ap->ops->port_stop(ap); |
| } |
| devres_free(start_dr); |
| return rc; |
| } |
| |
| /** |
| * ata_sas_host_init - Initialize a host struct |
| * @host: host to initialize |
| * @dev: device host is attached to |
| * @flags: host flags |
| * @ops: port_ops |
| * |
| * LOCKING: |
| * PCI/etc. bus probe sem. |
| * |
| */ |
| /* KILLME - the only user left is ipr */ |
| void ata_host_init(struct ata_host *host, struct device *dev, |
| unsigned long flags, struct ata_port_operations *ops) |
| { |
| spin_lock_init(&host->lock); |
| host->dev = dev; |
| host->flags = flags; |
| host->ops = ops; |
| } |
| |
| /** |
| * ata_host_register - register initialized ATA host |
| * @host: ATA host to register |
| * @sht: template for SCSI host |
| * |
| * Register initialized ATA host. @host is allocated using |
| * ata_host_alloc() and fully initialized by LLD. This function |
| * starts ports, registers @host with ATA and SCSI layers and |
| * probe registered devices. |
| * |
| * LOCKING: |
| * Inherited from calling layer (may sleep). |
| * |
| * RETURNS: |
| * 0 on success, -errno otherwise. |
| */ |
| int ata_host_register(struct ata_host *host, struct scsi_host_template *sht) |
| { |
| int i, rc; |
| |
| /* host must have been started */ |
| if (!(host->flags & ATA_HOST_STARTED)) { |
| dev_printk(KERN_ERR, host->dev, |
| "BUG: trying to register unstarted host\n"); |
| WARN_ON(1); |
| return -EINVAL; |
| } |
| |
| /* Blow away unused ports. This happens when LLD can't |
| * determine the exact number of ports to allocate at |
| * allocation time. |
| */ |
| for (i = host->n_ports; host->ports[i]; i++) |
| kfree(host->ports[i]); |
| |
| /* give ports names and add SCSI hosts */ |
| for (i = 0; i < host->n_ports; i++) |
| host->ports[i]->print_id = ata_print_id++; |
| |
| rc = ata_scsi_add_hosts(host, sht); |
| if (rc) |
| return rc; |
| |
| /* associate with ACPI nodes */ |
| ata_acpi_associate(host); |
| |
| /* set cable, sata_spd_limit and report */ |
| for (i = 0; i < host->n_ports; i++) { |
| struct ata_port *ap = host->ports[i]; |
| unsigned long xfer_mask; |
| |
| /* set SATA cable type if still unset */ |
| if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA)) |
| ap->cbl = ATA_CBL_SATA; |
| |
| /* init sata_spd_limit to the current value */ |
| sata_link_init_spd(&ap->link); |
| |
| /* print per-port info to dmesg */ |
| xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask, |
| ap->udma_mask); |
| |
| if (!ata_port_is_dummy(ap)) { |
| ata_port_printk(ap, KERN_INFO, |
| "%cATA max %s %s\n", |
| (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P', |
| ata_mode_string(xfer_mask), |
| ap->link.eh_info.desc); |
| ata_ehi_clear_desc(&ap->link.eh_info); |
| } else |
| ata_port_printk(ap, KERN_INFO, "DUMMY\n"); |
| } |
| |
| /* perform each probe synchronously */ |
| DPRINTK("probe begin\n"); |
| for (i = 0; i < host->n_ports; i++) { |
| struct ata_port *ap = host->ports[i]; |
| |
| /* probe */ |
| if (ap->ops->error_handler) { |
| struct ata_eh_info *ehi = &ap->link.eh_info; |
| unsigned long flags; |
| |
| ata_port_probe(ap); |
| |
| /* kick EH for boot probing */ |
| spin_lock_irqsave(ap->lock, flags); |
| |
| ehi->probe_mask |= ATA_ALL_DEVICES; |
| ehi->action |= ATA_EH_RESET; |
| ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET; |
| |
| ap->pflags &= ~ATA_PFLAG_INITIALIZING; |
| ap->pflags |= ATA_PFLAG_LOADING; |
| ata_port_schedule_eh(ap); |
| |
| spin_unlock_irqrestore(ap->lock, flags); |
| |
| /* wait for EH to finish */ |
| ata_port_wait_eh(ap); |
| } else { |
| DPRINTK("ata%u: bus probe begin\n", ap->print_id); |
| rc = ata_bus_probe(ap); |
| DPRINTK("ata%u: bus probe end\n", ap->print_id); |
| |
| if (rc) { |
| /* FIXME: do something useful here? |
| * Current libata behavior will |
| * tear down everything when |
| * the module is removed |
| * or the h/w is unplugged. |
| */ |
| } |
| } |
| } |
| |
| /* probes are done, now scan each port's disk(s) */ |
| DPRINTK("host probe begin\n"); |
| for (i = 0; i < host->n_ports; i++) { |
| struct ata_port *ap = host->ports[i]; |
| |
| ata_scsi_scan_host(ap, 1); |
| ata_lpm_schedule(ap, ap->pm_policy); |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * ata_host_activate - start host, request IRQ and register it |
| * @host: target ATA host |
| * @irq: IRQ to request |
| * @irq_handler: irq_handler used when requesting IRQ |
| * @irq_flags: irq_flags used when requesting IRQ |
| * @sht: scsi_host_template to use when registering the host |
| * |
| * After allocating an ATA host and initializing it, most libata |
| * LLDs perform three steps to activate the host - start host, |
| * request IRQ and register it. This helper takes necessasry |
| * arguments and performs the three steps in one go. |
| * |
| * An invalid IRQ skips the IRQ registration and expects the host to |
| * have set polling mode on the port. In this case, @irq_handler |
| * should be NULL. |
| * |
| * LOCKING: |
| * Inherited from calling layer (may sleep). |
| * |
| * RETURNS: |
| * 0 on success, -errno otherwise. |
| */ |
| int ata_host_activate(struct ata_host *host, int irq, |
| irq_handler_t irq_handler, unsigned long irq_flags, |
| struct scsi_host_template *sht) |
| { |
| int i, rc; |
| |
| rc = ata_host_start(host); |
| if (rc) |
| return rc; |
| |
| /* Special case for polling mode */ |
| if (!irq) { |
| WARN_ON(irq_handler); |
| return ata_host_register(host, sht); |
| } |
| |
| rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags, |
| dev_driver_string(host->dev), host); |
| if (rc) |
| return rc; |
| |
| for (i = 0; i < host->n_ports; i++) |
| ata_port_desc(host->ports[i], "irq %d", irq); |
| |
| rc = ata_host_register(host, sht); |
| /* if failed, just free the IRQ and leave ports alone */ |
| if (rc) |
| devm_free_irq(host->dev, irq, host); |
| |
| return rc; |
| } |
| |
| /** |
| * ata_port_detach - Detach ATA port in prepration of device removal |
| * @ap: ATA port to be detached |
| * |
| * Detach all ATA devices and the associated SCSI devices of @ap; |
| * then, remove the associated SCSI host. @ap is guaranteed to |
| * be quiescent on return from this function. |
| * |
| * LOCKING: |
| * Kernel thread context (may sleep). |
| */ |
| static void ata_port_detach(struct ata_port *ap) |
| { |
| unsigned long flags; |
| struct ata_link *link; |
| struct ata_device *dev; |
| |
| if (!ap->ops->error_handler) |
| goto skip_eh; |
| |
| /* tell EH we're leaving & flush EH */ |
| spin_lock_irqsave(ap->lock, flags); |
| ap->pflags |= ATA_PFLAG_UNLOADING; |
| spin_unlock_irqrestore(ap->lock, flags); |
| |
| ata_port_wait_eh(ap); |
| |
| /* EH is now guaranteed to see UNLOADING - EH context belongs |
| * to us. Disable all existing devices. |
| */ |
| ata_port_for_each_link(link, ap) { |
| ata_link_for_each_dev(dev, link) |
| ata_dev_disable(dev); |
| } |
| |
| /* Final freeze & EH. All in-flight commands are aborted. EH |
| * will be skipped and retrials will be terminated with bad |
| * target. |
| */ |
| spin_lock_irqsave(ap->lock, flags); |
| ata_port_freeze(ap); /* won't be thawed */ |
| spin_unlock_irqrestore(ap->lock, flags); |
| |
| ata_port_wait_eh(ap); |
| cancel_rearming_delayed_work(&ap->hotplug_task); |
| |
| skip_eh: |
| /* remove the associated SCSI host */ |
| scsi_remove_host(ap->scsi_host); |
| } |
| |
| /** |
| * ata_host_detach - Detach all ports of an ATA host |
| * @host: Host to detach |
| * |
| * Detach all ports of @host. |
| * |
| * LOCKING: |
| * Kernel thread context (may sleep). |
| */ |
| void ata_host_detach(struct ata_host *host) |
| { |
| int i; |
| |
| for (i = 0; i < host->n_ports; i++) |
| ata_port_detach(host->ports[i]); |
| |
| /* the host is dead now, dissociate ACPI */ |
| ata_acpi_dissociate(host); |
| } |
| |
| #ifdef CONFIG_PCI |
| |
| /** |
| * ata_pci_remove_one - PCI layer callback for device removal |
| * @pdev: PCI device that was removed |
| * |
| * PCI layer indicates to libata via this hook that hot-unplug or |
| * module unload event has occurred. Detach all ports. Resource |
| * release is handled via devres. |
| * |
| * LOCKING: |
| * Inherited from PCI layer (may sleep). |
| */ |
| void ata_pci_remove_one(struct pci_dev *pdev) |
| { |
| struct device *dev = &pdev->dev; |
| struct ata_host *host = dev_get_drvdata(dev); |
| |
| ata_host_detach(host); |
| } |
| |
| /* move to PCI subsystem */ |
| int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) |
| { |
| unsigned long tmp = 0; |
| |
| switch (bits->width) { |
| case 1: { |
| u8 tmp8 = 0; |
| pci_read_config_byte(pdev, bits->reg, &tmp8); |
| tmp = tmp8; |
| break; |
| } |
| case 2: { |
| u16 tmp16 = 0; |
| pci_read_config_word(pdev, bits->reg, &tmp16); |
| tmp = tmp16; |
| break; |
| } |
| case 4: { |
| u32 tmp32 = 0; |
| pci_read_config_dword(pdev, bits->reg, &tmp32); |
| tmp = tmp32; |
| break; |
| } |
| |
| default: |
| return -EINVAL; |
| } |
| |
| tmp &= bits->mask; |
| |
| return (tmp == bits->val) ? 1 : 0; |
| } |
| |
| #ifdef CONFIG_PM |
| void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg) |
| { |
| pci_save_state(pdev); |
| pci_disable_device(pdev); |
| |
| if (mesg.event & PM_EVENT_SLEEP) |
| pci_set_power_state(pdev, PCI_D3hot); |
| } |
| |
| int ata_pci_device_do_resume(struct pci_dev *pdev) |
| { |
| int rc; |
| |
| pci_set_power_state(pdev, PCI_D0); |
| pci_restore_state(pdev); |
| |
| rc = pcim_enable_device(pdev); |
| if (rc) { |
| dev_printk(KERN_ERR, &pdev->dev, |
| "failed to enable device after resume (%d)\n", rc); |
| return rc; |
| } |
| |
| pci_set_master(pdev); |
| return 0; |
| } |
| |
| int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg) |
| { |
| struct ata_host *host = dev_get_drvdata(&pdev->dev); |
| int rc = 0; |
| |
| rc = ata_host_suspend(host, mesg); |
| if (rc) |
| return rc; |
| |
| ata_pci_device_do_suspend(pdev, mesg); |
| |
| return 0; |
| } |
| |
| int ata_pci_device_resume(struct pci_dev *pdev) |
| { |
| struct ata_host *host = dev_get_drvdata(&pdev->dev); |
| int rc; |
| |
| rc = ata_pci_device_do_resume(pdev); |
| if (rc == 0) |
| ata_host_resume(host); |
| return rc; |
| } |
| #endif /* CONFIG_PM */ |
| |
| #endif /* CONFIG_PCI */ |
| |
| static int __init ata_parse_force_one(char **cur, |
| struct ata_force_ent *force_ent, |
| const char **reason) |
| { |
| /* FIXME: Currently, there's no way to tag init const data and |
| * using __initdata causes build failure on some versions of |
| * gcc. Once __initdataconst is implemented, add const to the |
| * following structure. |
| */ |
| static struct ata_force_param force_tbl[] __initdata = { |
| { "40c", .cbl = ATA_CBL_PATA40 }, |
| { "80c", .cbl = ATA_CBL_PATA80 }, |
| { "short40c", .cbl = ATA_CBL_PATA40_SHORT }, |
| { "unk", .cbl = ATA_CBL_PATA_UNK }, |
| { "ign", .cbl = ATA_CBL_PATA_IGN }, |
| { "sata", .cbl = ATA_CBL_SATA }, |
| { "1.5Gbps", .spd_limit = 1 }, |
| { "3.0Gbps", .spd_limit = 2 }, |
| { "noncq", .horkage_on = ATA_HORKAGE_NONCQ }, |
| { "ncq", .horkage_off = ATA_HORKAGE_NONCQ }, |
| { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) }, |
| { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) }, |
| { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) }, |
| { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) }, |
| { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) }, |
| { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) }, |
| { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) }, |
| { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) }, |
| { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) }, |
| { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) }, |
| { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) }, |
| { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) }, |
| { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, |
| { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, |
| { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) }, |
| { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, |
| { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, |
| { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) }, |
| { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, |
| { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, |
| { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) }, |
| { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, |
| { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, |
| { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) }, |
| { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, |
| { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, |
| { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) }, |
| { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, |
| { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, |
| { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) }, |
| { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, |
| { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, |
| { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) }, |
| { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) }, |
| }; |
| char *start = *cur, *p = *cur; |
| char *id, *val, *endp; |
| const struct ata_force_param *match_fp = NULL; |
| int nr_matches = 0, i; |
| |
| /* find where this param ends and update *cur */ |
| while (*p != '\0' && *p != ',') |
| p++; |
| |
| if (*p == '\0') |
| *cur = p; |
| else |
| *cur = p + 1; |
| |
| *p = '\0'; |
| |
| /* parse */ |
| p = strchr(start, ':'); |
| if (!p) { |
| val = strstrip(start); |
| goto parse_val; |
| } |
| *p = '\0'; |
| |
| id = strstrip(start); |
| val = strstrip(p + 1); |
| |
| /* parse id */ |
| p = strchr(id, '.'); |
| if (p) { |
| *p++ = '\0'; |
| force_ent->device = simple_strtoul(p, &endp, 10); |
| if (p == endp || *endp != '\0') { |
| *reason = "invalid device"; |
| return -EINVAL; |
| } |
| } |
| |
| force_ent->port = simple_strtoul(id, &endp, 10); |
| if (p == endp || *endp != '\0') { |
| *reason = "invalid port/link"; |
| return -EINVAL; |
| } |
| |
| parse_val: |
| /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */ |
| for (i = 0; i < ARRAY_SIZE(force_tbl); i++) { |
| const struct ata_force_param *fp = &force_tbl[i]; |
| |
| if (strncasecmp(val, fp->name, strlen(val))) |
| continue; |
| |
| nr_matches++; |
| match_fp = fp; |
| |
| if (strcasecmp(val, fp->name) == 0) { |
| nr_matches = 1; |
| break; |
| } |
| } |
| |
| if (!nr_matches) { |
| *reason = "unknown value"; |
| return -EINVAL; |
| } |
| if (nr_matches > 1) { |
| *reason = "ambigious value"; |
| return -EINVAL; |
| } |
| |
| force_ent->param = *match_fp; |
| |
| return 0; |
| } |
| |
| static void __init ata_parse_force_param(void) |
| { |
| int idx = 0, size = 1; |
| int last_port = -1, last_device = -1; |
| char *p, *cur, *next; |
| |
| /* calculate maximum number of params and allocate force_tbl */ |
| for (p = ata_force_param_buf; *p; p++) |
| if (*p == ',') |
| size++; |
| |
| ata_force_tbl = kzalloc(sizeof(ata_force_tbl[0]) * size, GFP_KERNEL); |
| if (!ata_force_tbl) { |
| printk(KERN_WARNING "ata: failed to extend force table, " |
| "libata.force ignored\n"); |
| return; |
| } |
| |
| /* parse and populate the table */ |
| for (cur = ata_force_param_buf; *cur != '\0'; cur = next) { |
| const char *reason = ""; |
| struct ata_force_ent te = { .port = -1, .device = -1 }; |
| |
| next = cur; |
| if (ata_parse_force_one(&next, &te, &reason)) { |
| printk(KERN_WARNING "ata: failed to parse force " |
| "parameter \"%s\" (%s)\n", |
| cur, reason); |
| continue; |
| } |
| |
| if (te.port == -1) { |
| te.port = last_port; |
| te.device = last_device; |
| } |
| |
| ata_force_tbl[idx++] = te; |
| |
| last_port = te.port; |
| last_device = te.device; |
| } |
| |
| ata_force_tbl_size = idx; |
| } |
| |
| static int __init ata_init(void) |
| { |
| ata_probe_timeout *= HZ; |
| |
| ata_parse_force_param(); |
| |
| ata_wq = create_workqueue("ata"); |
| if (!ata_wq) |
| return -ENOMEM; |
| |
| ata_aux_wq = create_singlethread_workqueue("ata_aux"); |
| if (!ata_aux_wq) { |
| destroy_workqueue(ata_wq); |
| return -ENOMEM; |
| } |
| |
| printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n"); |
| return 0; |
| } |
| |
| static void __exit ata_exit(void) |
| { |
| kfree(ata_force_tbl); |
| destroy_workqueue(ata_wq); |
| destroy_workqueue(ata_aux_wq); |
| } |
| |
| subsys_initcall(ata_init); |
| module_exit(ata_exit); |
| |
| static unsigned long ratelimit_time; |
| static DEFINE_SPINLOCK(ata_ratelimit_lock); |
| |
| int ata_ratelimit(void) |
| { |
| int rc; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&ata_ratelimit_lock, flags); |
| |
| if (time_after(jiffies, ratelimit_time)) { |
| rc = 1; |
| ratelimit_time = jiffies + (HZ/5); |
| } else |
| rc = 0; |
| |
| spin_unlock_irqrestore(&ata_ratelimit_lock, flags); |
| |
| return rc; |
| } |
| |
| /** |
| * ata_wait_register - wait until register value changes |
| * @reg: IO-mapped register |
| * @mask: Mask to apply to read register value |
| * @val: Wait condition |
| * @interval_msec: polling interval in milliseconds |
| * @timeout_msec: timeout in milliseconds |
| * |
| * Waiting for some bits of register to change is a common |
| * operation for ATA controllers. This function reads 32bit LE |
| * IO-mapped register @reg and tests for the following condition. |
| * |
| * (*@reg & mask) != val |
| * |
| * If the condition is met, it returns; otherwise, the process is |
| * repeated after @interval_msec until timeout. |
| * |
| * LOCKING: |
| * Kernel thread context (may sleep) |
| * |
| * RETURNS: |
| * The final register value. |
| */ |
| u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, |
| unsigned long interval_msec, |
| unsigned long timeout_msec) |
| { |
| unsigned long timeout; |
| u32 tmp; |
| |
| tmp = ioread32(reg); |
| |
| /* Calculate timeout _after_ the first read to make sure |
| * preceding writes reach the controller before starting to |
| * eat away the timeout. |
| */ |
| timeout = jiffies + (timeout_msec * HZ) / 1000; |
| |
| while ((tmp & mask) == val && time_before(jiffies, timeout)) { |
| msleep(interval_msec); |
| tmp = ioread32(reg); |
| } |
| |
| return tmp; |
| } |
| |
| /* |
| * Dummy port_ops |
| */ |
| static void ata_dummy_noret(struct ata_port *ap) { } |
| static int ata_dummy_ret0(struct ata_port *ap) { return 0; } |
| static void ata_dummy_qc_noret(struct ata_queued_cmd *qc) { } |
| |
| static u8 ata_dummy_check_status(struct ata_port *ap) |
| { |
| return ATA_DRDY; |
| } |
| |
| static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc) |
| { |
| return AC_ERR_SYSTEM; |
| } |
| |
| struct ata_port_operations ata_dummy_port_ops = { |
| .check_status = ata_dummy_check_status, |
| .check_altstatus = ata_dummy_check_status, |
| .dev_select = ata_noop_dev_select, |
| .qc_prep = ata_noop_qc_prep, |
| .qc_issue = ata_dummy_qc_issue, |
| .freeze = ata_dummy_noret, |
| .thaw = ata_dummy_noret, |
| .error_handler = ata_dummy_noret, |
| .post_internal_cmd = ata_dummy_qc_noret, |
| .irq_clear = ata_dummy_noret, |
| .port_start = ata_dummy_ret0, |
| .port_stop = ata_dummy_noret, |
| }; |
| |
| const struct ata_port_info ata_dummy_port_info = { |
| .port_ops = &ata_dummy_port_ops, |
| }; |
| |
| /* |
| * libata is essentially a library of internal helper functions for |
| * low-level ATA host controller drivers. As such, the API/ABI is |
| * likely to change as new drivers are added and updated. |
| * Do not depend on ABI/API stability. |
| */ |
| EXPORT_SYMBOL_GPL(sata_deb_timing_normal); |
| EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug); |
| EXPORT_SYMBOL_GPL(sata_deb_timing_long); |
| EXPORT_SYMBOL_GPL(ata_base_port_ops); |
| EXPORT_SYMBOL_GPL(sata_port_ops); |
| EXPORT_SYMBOL_GPL(sata_pmp_port_ops); |
| EXPORT_SYMBOL_GPL(ata_dummy_port_ops); |
| EXPORT_SYMBOL_GPL(ata_dummy_port_info); |
| EXPORT_SYMBOL_GPL(ata_std_bios_param); |
| EXPORT_SYMBOL_GPL(ata_host_init); |
| EXPORT_SYMBOL_GPL(ata_host_alloc); |
| EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo); |
| EXPORT_SYMBOL_GPL(ata_host_start); |
| EXPORT_SYMBOL_GPL(ata_host_register); |
| EXPORT_SYMBOL_GPL(ata_host_activate); |
| EXPORT_SYMBOL_GPL(ata_host_detach); |
| EXPORT_SYMBOL_GPL(ata_sg_init); |
| EXPORT_SYMBOL_GPL(ata_qc_complete); |
| EXPORT_SYMBOL_GPL(ata_qc_complete_multiple); |
| EXPORT_SYMBOL_GPL(ata_noop_dev_select); |
| EXPORT_SYMBOL_GPL(sata_print_link_status); |
| EXPORT_SYMBOL_GPL(atapi_cmd_type); |
| EXPORT_SYMBOL_GPL(ata_tf_to_fis); |
| EXPORT_SYMBOL_GPL(ata_tf_from_fis); |
| EXPORT_SYMBOL_GPL(ata_pack_xfermask); |
| EXPORT_SYMBOL_GPL(ata_unpack_xfermask); |
| EXPORT_SYMBOL_GPL(ata_xfer_mask2mode); |
| EXPORT_SYMBOL_GPL(ata_xfer_mode2mask); |
| EXPORT_SYMBOL_GPL(ata_xfer_mode2shift); |
| EXPORT_SYMBOL_GPL(ata_mode_string); |
| EXPORT_SYMBOL_GPL(ata_id_xfermask); |
| EXPORT_SYMBOL_GPL(ata_port_start); |
| EXPORT_SYMBOL_GPL(ata_do_set_mode); |
| EXPORT_SYMBOL_GPL(ata_std_qc_defer); |
| EXPORT_SYMBOL_GPL(ata_noop_qc_prep); |
| EXPORT_SYMBOL_GPL(ata_noop_irq_clear); |
| EXPORT_SYMBOL_GPL(ata_port_probe); |
| EXPORT_SYMBOL_GPL(ata_dev_disable); |
| EXPORT_SYMBOL_GPL(sata_set_spd); |
| EXPORT_SYMBOL_GPL(sata_link_debounce); |
| EXPORT_SYMBOL_GPL(sata_link_resume); |
| EXPORT_SYMBOL_GPL(sata_link_hardreset); |
| EXPORT_SYMBOL_GPL(ata_dev_classify); |
| EXPORT_SYMBOL_GPL(ata_dev_pair); |
| EXPORT_SYMBOL_GPL(ata_port_disable); |
| EXPORT_SYMBOL_GPL(ata_ratelimit); |
| EXPORT_SYMBOL_GPL(ata_wait_register); |
| EXPORT_SYMBOL_GPL(ata_scsi_ioctl); |
| EXPORT_SYMBOL_GPL(ata_scsi_queuecmd); |
| EXPORT_SYMBOL_GPL(ata_scsi_slave_config); |
| EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); |
| EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth); |
| EXPORT_SYMBOL_GPL(sata_scr_valid); |
| EXPORT_SYMBOL_GPL(sata_scr_read); |
| EXPORT_SYMBOL_GPL(sata_scr_write); |
| EXPORT_SYMBOL_GPL(sata_scr_write_flush); |
| EXPORT_SYMBOL_GPL(ata_link_online); |
| EXPORT_SYMBOL_GPL(ata_link_offline); |
| #ifdef CONFIG_PM |
| EXPORT_SYMBOL_GPL(ata_host_suspend); |
| EXPORT_SYMBOL_GPL(ata_host_resume); |
| #endif /* CONFIG_PM */ |
| EXPORT_SYMBOL_GPL(ata_id_string); |
| EXPORT_SYMBOL_GPL(ata_id_c_string); |
| EXPORT_SYMBOL_GPL(ata_scsi_simulate); |
| |
| EXPORT_SYMBOL_GPL(ata_pio_need_iordy); |
| EXPORT_SYMBOL_GPL(ata_timing_find_mode); |
| EXPORT_SYMBOL_GPL(ata_timing_compute); |
| EXPORT_SYMBOL_GPL(ata_timing_merge); |
| EXPORT_SYMBOL_GPL(ata_timing_cycle2mode); |
| |
| #ifdef CONFIG_PCI |
| EXPORT_SYMBOL_GPL(pci_test_config_bits); |
| EXPORT_SYMBOL_GPL(ata_pci_remove_one); |
| #ifdef CONFIG_PM |
| EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); |
| EXPORT_SYMBOL_GPL(ata_pci_device_do_resume); |
| EXPORT_SYMBOL_GPL(ata_pci_device_suspend); |
| EXPORT_SYMBOL_GPL(ata_pci_device_resume); |
| #endif /* CONFIG_PM */ |
| #endif /* CONFIG_PCI */ |
| |
| EXPORT_SYMBOL_GPL(sata_pmp_qc_defer_cmd_switch); |
| EXPORT_SYMBOL_GPL(sata_pmp_std_prereset); |
| EXPORT_SYMBOL_GPL(sata_pmp_std_hardreset); |
| EXPORT_SYMBOL_GPL(sata_pmp_std_postreset); |
| EXPORT_SYMBOL_GPL(sata_pmp_error_handler); |
| |
| EXPORT_SYMBOL_GPL(__ata_ehi_push_desc); |
| EXPORT_SYMBOL_GPL(ata_ehi_push_desc); |
| EXPORT_SYMBOL_GPL(ata_ehi_clear_desc); |
| EXPORT_SYMBOL_GPL(ata_port_desc); |
| #ifdef CONFIG_PCI |
| EXPORT_SYMBOL_GPL(ata_port_pbar_desc); |
| #endif /* CONFIG_PCI */ |
| EXPORT_SYMBOL_GPL(ata_port_schedule_eh); |
| EXPORT_SYMBOL_GPL(ata_link_abort); |
| EXPORT_SYMBOL_GPL(ata_port_abort); |
| EXPORT_SYMBOL_GPL(ata_port_freeze); |
| EXPORT_SYMBOL_GPL(sata_async_notification); |
| EXPORT_SYMBOL_GPL(ata_eh_freeze_port); |
| EXPORT_SYMBOL_GPL(ata_eh_thaw_port); |
| EXPORT_SYMBOL_GPL(ata_eh_qc_complete); |
| EXPORT_SYMBOL_GPL(ata_eh_qc_retry); |
| EXPORT_SYMBOL_GPL(ata_do_eh); |
| EXPORT_SYMBOL_GPL(ata_std_error_handler); |
| |
| EXPORT_SYMBOL_GPL(ata_cable_40wire); |
| EXPORT_SYMBOL_GPL(ata_cable_80wire); |
| EXPORT_SYMBOL_GPL(ata_cable_unknown); |
| EXPORT_SYMBOL_GPL(ata_cable_ignore); |
| EXPORT_SYMBOL_GPL(ata_cable_sata); |