+++ /dev/null
-/*
- * libata-scsi.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.t10.org/
- * - http://www.t13.org/
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/blkdev.h>
-#include <linux/spinlock.h>
-#include <scsi/scsi.h>
-#include <scsi/scsi_host.h>
-#include <scsi/scsi_cmnd.h>
-#include <scsi/scsi_eh.h>
-#include <scsi/scsi_device.h>
-#include <scsi/scsi_tcq.h>
-#include <scsi/scsi_transport.h>
-#include <linux/libata.h>
-#include <linux/hdreg.h>
-#include <asm/uaccess.h>
-
-#include "libata.h"
-
-#define SECTOR_SIZE 512
-
-typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc, const u8 *scsicmd);
-
-static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
- const struct scsi_device *scsidev);
-static struct ata_device * ata_scsi_find_dev(struct ata_port *ap,
- const struct scsi_device *scsidev);
-static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
- unsigned int id, unsigned int lun);
-
-
-#define RW_RECOVERY_MPAGE 0x1
-#define RW_RECOVERY_MPAGE_LEN 12
-#define CACHE_MPAGE 0x8
-#define CACHE_MPAGE_LEN 20
-#define CONTROL_MPAGE 0xa
-#define CONTROL_MPAGE_LEN 12
-#define ALL_MPAGES 0x3f
-#define ALL_SUB_MPAGES 0xff
-
-
-static const u8 def_rw_recovery_mpage[] = {
- RW_RECOVERY_MPAGE,
- RW_RECOVERY_MPAGE_LEN - 2,
- (1 << 7) | /* AWRE, sat-r06 say it shall be 0 */
- (1 << 6), /* ARRE (auto read reallocation) */
- 0, /* read retry count */
- 0, 0, 0, 0,
- 0, /* write retry count */
- 0, 0, 0
-};
-
-static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
- CACHE_MPAGE,
- CACHE_MPAGE_LEN - 2,
- 0, /* contains WCE, needs to be 0 for logic */
- 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, /* contains DRA, needs to be 0 for logic */
- 0, 0, 0, 0, 0, 0, 0
-};
-
-static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
- CONTROL_MPAGE,
- CONTROL_MPAGE_LEN - 2,
- 2, /* DSENSE=0, GLTSD=1 */
- 0, /* [QAM+QERR may be 1, see 05-359r1] */
- 0, 0, 0, 0, 0xff, 0xff,
- 0, 30 /* extended self test time, see 05-359r1 */
-};
-
-/*
- * libata transport template. libata doesn't do real transport stuff.
- * It just needs the eh_timed_out hook.
- */
-struct scsi_transport_template ata_scsi_transport_template = {
- .eh_strategy_handler = ata_scsi_error,
- .eh_timed_out = ata_scsi_timed_out,
- .user_scan = ata_scsi_user_scan,
-};
-
-
-static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
- void (*done)(struct scsi_cmnd *))
-{
- ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
- /* "Invalid field in cbd" */
- done(cmd);
-}
-
-/**
- * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
- * @sdev: SCSI device for which BIOS geometry is to be determined
- * @bdev: block device associated with @sdev
- * @capacity: capacity of SCSI device
- * @geom: location to which geometry will be output
- *
- * Generic bios head/sector/cylinder calculator
- * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
- * mapping. Some situations may arise where the disk is not
- * bootable if this is not used.
- *
- * LOCKING:
- * Defined by the SCSI layer. We don't really care.
- *
- * RETURNS:
- * Zero.
- */
-int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
- sector_t capacity, int geom[])
-{
- geom[0] = 255;
- geom[1] = 63;
- sector_div(capacity, 255*63);
- geom[2] = capacity;
-
- return 0;
-}
-
-/**
- * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
- * @scsidev: Device to which we are issuing command
- * @arg: User provided data for issuing command
- *
- * LOCKING:
- * Defined by the SCSI layer. We don't really care.
- *
- * RETURNS:
- * Zero on success, negative errno on error.
- */
-
-int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
-{
- int rc = 0;
- u8 scsi_cmd[MAX_COMMAND_SIZE];
- u8 args[4], *argbuf = NULL;
- int argsize = 0;
- struct scsi_sense_hdr sshdr;
- enum dma_data_direction data_dir;
-
- if (arg == NULL)
- return -EINVAL;
-
- if (copy_from_user(args, arg, sizeof(args)))
- return -EFAULT;
-
- memset(scsi_cmd, 0, sizeof(scsi_cmd));
-
- if (args[3]) {
- argsize = SECTOR_SIZE * args[3];
- argbuf = kmalloc(argsize, GFP_KERNEL);
- if (argbuf == NULL) {
- rc = -ENOMEM;
- goto error;
- }
-
- scsi_cmd[1] = (4 << 1); /* PIO Data-in */
- scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
- block count in sector count field */
- data_dir = DMA_FROM_DEVICE;
- } else {
- scsi_cmd[1] = (3 << 1); /* Non-data */
- /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
- data_dir = DMA_NONE;
- }
-
- scsi_cmd[0] = ATA_16;
-
- scsi_cmd[4] = args[2];
- if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */
- scsi_cmd[6] = args[3];
- scsi_cmd[8] = args[1];
- scsi_cmd[10] = 0x4f;
- scsi_cmd[12] = 0xc2;
- } else {
- scsi_cmd[6] = args[1];
- }
- scsi_cmd[14] = args[0];
-
- /* Good values for timeout and retries? Values below
- from scsi_ioctl_send_command() for default case... */
- if (scsi_execute_req(scsidev, scsi_cmd, data_dir, argbuf, argsize,
- &sshdr, (10*HZ), 5)) {
- rc = -EIO;
- goto error;
- }
-
- /* Need code to retrieve data from check condition? */
-
- if ((argbuf)
- && copy_to_user(arg + sizeof(args), argbuf, argsize))
- rc = -EFAULT;
-error:
- kfree(argbuf);
- return rc;
-}
-
-/**
- * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
- * @scsidev: Device to which we are issuing command
- * @arg: User provided data for issuing command
- *
- * LOCKING:
- * Defined by the SCSI layer. We don't really care.
- *
- * RETURNS:
- * Zero on success, negative errno on error.
- */
-int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
-{
- int rc = 0;
- u8 scsi_cmd[MAX_COMMAND_SIZE];
- u8 args[7];
- struct scsi_sense_hdr sshdr;
-
- if (arg == NULL)
- return -EINVAL;
-
- if (copy_from_user(args, arg, sizeof(args)))
- return -EFAULT;
-
- memset(scsi_cmd, 0, sizeof(scsi_cmd));
- scsi_cmd[0] = ATA_16;
- scsi_cmd[1] = (3 << 1); /* Non-data */
- /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
- scsi_cmd[4] = args[1];
- scsi_cmd[6] = args[2];
- scsi_cmd[8] = args[3];
- scsi_cmd[10] = args[4];
- scsi_cmd[12] = args[5];
- scsi_cmd[14] = args[0];
-
- /* Good values for timeout and retries? Values below
- from scsi_ioctl_send_command() for default case... */
- if (scsi_execute_req(scsidev, scsi_cmd, DMA_NONE, NULL, 0, &sshdr,
- (10*HZ), 5))
- rc = -EIO;
-
- /* Need code to retrieve data from check condition? */
- return rc;
-}
-
-int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
-{
- int val = -EINVAL, rc = -EINVAL;
-
- switch (cmd) {
- case ATA_IOC_GET_IO32:
- val = 0;
- if (copy_to_user(arg, &val, 1))
- return -EFAULT;
- return 0;
-
- case ATA_IOC_SET_IO32:
- val = (unsigned long) arg;
- if (val != 0)
- return -EINVAL;
- return 0;
-
- case HDIO_DRIVE_CMD:
- if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
- return -EACCES;
- return ata_cmd_ioctl(scsidev, arg);
-
- case HDIO_DRIVE_TASK:
- if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
- return -EACCES;
- return ata_task_ioctl(scsidev, arg);
-
- default:
- rc = -ENOTTY;
- break;
- }
-
- return rc;
-}
-
-/**
- * ata_scsi_qc_new - acquire new ata_queued_cmd reference
- * @dev: ATA device to which the new command is attached
- * @cmd: SCSI command that originated this ATA command
- * @done: SCSI command completion function
- *
- * Obtain a reference to an unused ata_queued_cmd structure,
- * which is the basic libata structure representing a single
- * ATA command sent to the hardware.
- *
- * If a command was available, fill in the SCSI-specific
- * portions of the structure with information on the
- * current command.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- *
- * RETURNS:
- * Command allocated, or %NULL if none available.
- */
-struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
- struct scsi_cmnd *cmd,
- void (*done)(struct scsi_cmnd *))
-{
- struct ata_queued_cmd *qc;
-
- qc = ata_qc_new_init(dev);
- if (qc) {
- qc->scsicmd = cmd;
- qc->scsidone = done;
-
- if (cmd->use_sg) {
- qc->__sg = (struct scatterlist *) cmd->request_buffer;
- qc->n_elem = cmd->use_sg;
- } else {
- qc->__sg = &qc->sgent;
- qc->n_elem = 1;
- }
- } else {
- cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
- done(cmd);
- }
-
- return qc;
-}
-
-/**
- * ata_dump_status - user friendly display of error info
- * @id: id of the port in question
- * @tf: ptr to filled out taskfile
- *
- * Decode and dump the ATA error/status registers for the user so
- * that they have some idea what really happened at the non
- * make-believe layer.
- *
- * LOCKING:
- * inherited from caller
- */
-void ata_dump_status(unsigned id, struct ata_taskfile *tf)
-{
- u8 stat = tf->command, err = tf->feature;
-
- printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
- if (stat & ATA_BUSY) {
- printk("Busy }\n"); /* Data is not valid in this case */
- } else {
- if (stat & 0x40) printk("DriveReady ");
- if (stat & 0x20) printk("DeviceFault ");
- if (stat & 0x10) printk("SeekComplete ");
- if (stat & 0x08) printk("DataRequest ");
- if (stat & 0x04) printk("CorrectedError ");
- if (stat & 0x02) printk("Index ");
- if (stat & 0x01) printk("Error ");
- printk("}\n");
-
- if (err) {
- printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
- if (err & 0x04) printk("DriveStatusError ");
- if (err & 0x80) {
- if (err & 0x04) printk("BadCRC ");
- else printk("Sector ");
- }
- if (err & 0x40) printk("UncorrectableError ");
- if (err & 0x10) printk("SectorIdNotFound ");
- if (err & 0x02) printk("TrackZeroNotFound ");
- if (err & 0x01) printk("AddrMarkNotFound ");
- printk("}\n");
- }
- }
-}
-
-/**
- * ata_scsi_device_suspend - suspend ATA device associated with sdev
- * @sdev: the SCSI device to suspend
- * @mesg: target power management message
- *
- * Request suspend EH action on the ATA device associated with
- * @sdev and wait for the operation to complete.
- *
- * LOCKING:
- * Kernel thread context (may sleep).
- *
- * RETURNS:
- * 0 on success, -errno otherwise.
- */
-int ata_scsi_device_suspend(struct scsi_device *sdev, pm_message_t mesg)
-{
- struct ata_port *ap = ata_shost_to_port(sdev->host);
- struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
- unsigned long flags;
- unsigned int action;
- int rc = 0;
-
- if (!dev)
- goto out;
-
- spin_lock_irqsave(ap->lock, flags);
-
- /* wait for the previous resume to complete */
- while (dev->flags & ATA_DFLAG_SUSPENDED) {
- spin_unlock_irqrestore(ap->lock, flags);
- ata_port_wait_eh(ap);
- spin_lock_irqsave(ap->lock, flags);
- }
-
- /* if @sdev is already detached, nothing to do */
- if (sdev->sdev_state == SDEV_OFFLINE ||
- sdev->sdev_state == SDEV_CANCEL || sdev->sdev_state == SDEV_DEL)
- goto out_unlock;
-
- /* request suspend */
- action = ATA_EH_SUSPEND;
- if (mesg.event != PM_EVENT_SUSPEND)
- action |= ATA_EH_PM_FREEZE;
- ap->eh_info.dev_action[dev->devno] |= action;
- ap->eh_info.flags |= ATA_EHI_QUIET;
- ata_port_schedule_eh(ap);
-
- spin_unlock_irqrestore(ap->lock, flags);
-
- /* wait for EH to do the job */
- ata_port_wait_eh(ap);
-
- spin_lock_irqsave(ap->lock, flags);
-
- /* If @sdev is still attached but the associated ATA device
- * isn't suspended, the operation failed.
- */
- if (sdev->sdev_state != SDEV_OFFLINE &&
- sdev->sdev_state != SDEV_CANCEL && sdev->sdev_state != SDEV_DEL &&
- !(dev->flags & ATA_DFLAG_SUSPENDED))
- rc = -EIO;
-
- out_unlock:
- spin_unlock_irqrestore(ap->lock, flags);
- out:
- if (rc == 0)
- sdev->sdev_gendev.power.power_state = mesg;
- return rc;
-}
-
-/**
- * ata_scsi_device_resume - resume ATA device associated with sdev
- * @sdev: the SCSI device to resume
- *
- * Request resume EH action on the ATA device associated with
- * @sdev and return immediately. This enables parallel
- * wakeup/spinup of devices.
- *
- * LOCKING:
- * Kernel thread context (may sleep).
- *
- * RETURNS:
- * 0.
- */
-int ata_scsi_device_resume(struct scsi_device *sdev)
-{
- struct ata_port *ap = ata_shost_to_port(sdev->host);
- struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
- struct ata_eh_info *ehi = &ap->eh_info;
- unsigned long flags;
- unsigned int action;
-
- if (!dev)
- goto out;
-
- spin_lock_irqsave(ap->lock, flags);
-
- /* if @sdev is already detached, nothing to do */
- if (sdev->sdev_state == SDEV_OFFLINE ||
- sdev->sdev_state == SDEV_CANCEL || sdev->sdev_state == SDEV_DEL)
- goto out_unlock;
-
- /* request resume */
- action = ATA_EH_RESUME;
- if (sdev->sdev_gendev.power.power_state.event == PM_EVENT_SUSPEND)
- __ata_ehi_hotplugged(ehi);
- else
- action |= ATA_EH_PM_FREEZE | ATA_EH_SOFTRESET;
- ehi->dev_action[dev->devno] |= action;
-
- /* We don't want autopsy and verbose EH messages. Disable
- * those if we're the only device on this link.
- */
- if (ata_port_max_devices(ap) == 1)
- ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
-
- ata_port_schedule_eh(ap);
-
- out_unlock:
- spin_unlock_irqrestore(ap->lock, flags);
- out:
- sdev->sdev_gendev.power.power_state = PMSG_ON;
- return 0;
-}
-
-/**
- * ata_to_sense_error - convert ATA error to SCSI error
- * @id: ATA device number
- * @drv_stat: value contained in ATA status register
- * @drv_err: value contained in ATA error register
- * @sk: the sense key we'll fill out
- * @asc: the additional sense code we'll fill out
- * @ascq: the additional sense code qualifier we'll fill out
- * @verbose: be verbose
- *
- * Converts an ATA error into a SCSI error. Fill out pointers to
- * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
- * format sense blocks.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- */
-void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc,
- u8 *ascq, int verbose)
-{
- int i;
-
- /* Based on the 3ware driver translation table */
- static const unsigned char sense_table[][4] = {
- /* BBD|ECC|ID|MAR */
- {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
- /* BBD|ECC|ID */
- {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
- /* ECC|MC|MARK */
- {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
- /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
- {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
- /* MC|ID|ABRT|TRK0|MARK */
- {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
- /* MCR|MARK */
- {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
- /* Bad address mark */
- {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
- /* TRK0 */
- {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
- /* Abort & !ICRC */
- {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
- /* Media change request */
- {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
- /* SRV */
- {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
- /* Media change */
- {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
- /* ECC */
- {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
- /* BBD - block marked bad */
- {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
- {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
- };
- static const unsigned char stat_table[][4] = {
- /* Must be first because BUSY means no other bits valid */
- {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
- {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
- {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
- {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
- {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
- };
-
- /*
- * Is this an error we can process/parse
- */
- if (drv_stat & ATA_BUSY) {
- drv_err = 0; /* Ignore the err bits, they're invalid */
- }
-
- if (drv_err) {
- /* Look for drv_err */
- for (i = 0; sense_table[i][0] != 0xFF; i++) {
- /* Look for best matches first */
- if ((sense_table[i][0] & drv_err) ==
- sense_table[i][0]) {
- *sk = sense_table[i][1];
- *asc = sense_table[i][2];
- *ascq = sense_table[i][3];
- goto translate_done;
- }
- }
- /* No immediate match */
- if (verbose)
- printk(KERN_WARNING "ata%u: no sense translation for "
- "error 0x%02x\n", id, drv_err);
- }
-
- /* Fall back to interpreting status bits */
- for (i = 0; stat_table[i][0] != 0xFF; i++) {
- if (stat_table[i][0] & drv_stat) {
- *sk = stat_table[i][1];
- *asc = stat_table[i][2];
- *ascq = stat_table[i][3];
- goto translate_done;
- }
- }
- /* No error? Undecoded? */
- if (verbose)
- printk(KERN_WARNING "ata%u: no sense translation for "
- "status: 0x%02x\n", id, drv_stat);
-
- /* We need a sensible error return here, which is tricky, and one
- that won't cause people to do things like return a disk wrongly */
- *sk = ABORTED_COMMAND;
- *asc = 0x00;
- *ascq = 0x00;
-
- translate_done:
- if (verbose)
- printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
- "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
- id, drv_stat, drv_err, *sk, *asc, *ascq);
- return;
-}
-
-/*
- * ata_gen_ata_desc_sense - Generate check condition sense block.
- * @qc: Command that completed.
- *
- * This function is specific to the ATA descriptor format sense
- * block specified for the ATA pass through commands. Regardless
- * of whether the command errored or not, return a sense
- * block. Copy all controller registers into the sense
- * block. Clear sense key, ASC & ASCQ if there is no error.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- */
-void ata_gen_ata_desc_sense(struct ata_queued_cmd *qc)
-{
- struct scsi_cmnd *cmd = qc->scsicmd;
- struct ata_taskfile *tf = &qc->result_tf;
- unsigned char *sb = cmd->sense_buffer;
- unsigned char *desc = sb + 8;
- int verbose = qc->ap->ops->error_handler == NULL;
-
- memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
-
- cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
-
- /*
- * Use ata_to_sense_error() to map status register bits
- * onto sense key, asc & ascq.
- */
- if (qc->err_mask ||
- tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
- ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
- &sb[1], &sb[2], &sb[3], verbose);
- sb[1] &= 0x0f;
- }
-
- /*
- * Sense data is current and format is descriptor.
- */
- sb[0] = 0x72;
-
- desc[0] = 0x09;
-
- /*
- * Set length of additional sense data.
- * Since we only populate descriptor 0, the total
- * length is the same (fixed) length as descriptor 0.
- */
- desc[1] = sb[7] = 14;
-
- /*
- * Copy registers into sense buffer.
- */
- desc[2] = 0x00;
- desc[3] = tf->feature; /* == error reg */
- desc[5] = tf->nsect;
- desc[7] = tf->lbal;
- desc[9] = tf->lbam;
- desc[11] = tf->lbah;
- desc[12] = tf->device;
- desc[13] = tf->command; /* == status reg */
-
- /*
- * Fill in Extend bit, and the high order bytes
- * if applicable.
- */
- if (tf->flags & ATA_TFLAG_LBA48) {
- desc[2] |= 0x01;
- desc[4] = tf->hob_nsect;
- desc[6] = tf->hob_lbal;
- desc[8] = tf->hob_lbam;
- desc[10] = tf->hob_lbah;
- }
-}
-
-/**
- * ata_gen_fixed_sense - generate a SCSI fixed sense block
- * @qc: Command that we are erroring out
- *
- * Leverage ata_to_sense_error() to give us the codes. Fit our
- * LBA in here if there's room.
- *
- * LOCKING:
- * inherited from caller
- */
-void ata_gen_fixed_sense(struct ata_queued_cmd *qc)
-{
- struct scsi_cmnd *cmd = qc->scsicmd;
- struct ata_taskfile *tf = &qc->result_tf;
- unsigned char *sb = cmd->sense_buffer;
- int verbose = qc->ap->ops->error_handler == NULL;
-
- memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
-
- cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
-
- /*
- * Use ata_to_sense_error() to map status register bits
- * onto sense key, asc & ascq.
- */
- if (qc->err_mask ||
- tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
- ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
- &sb[2], &sb[12], &sb[13], verbose);
- sb[2] &= 0x0f;
- }
-
- sb[0] = 0x70;
- sb[7] = 0x0a;
-
- if (tf->flags & ATA_TFLAG_LBA48) {
- /* TODO: find solution for LBA48 descriptors */
- }
-
- else if (tf->flags & ATA_TFLAG_LBA) {
- /* A small (28b) LBA will fit in the 32b info field */
- sb[0] |= 0x80; /* set valid bit */
- sb[3] = tf->device & 0x0f;
- sb[4] = tf->lbah;
- sb[5] = tf->lbam;
- sb[6] = tf->lbal;
- }
-
- else {
- /* TODO: C/H/S */
- }
-}
-
-static void ata_scsi_sdev_config(struct scsi_device *sdev)
-{
- sdev->use_10_for_rw = 1;
- sdev->use_10_for_ms = 1;
-}
-
-static void ata_scsi_dev_config(struct scsi_device *sdev,
- struct ata_device *dev)
-{
- unsigned int max_sectors;
-
- /* TODO: 2048 is an arbitrary number, not the
- * hardware maximum. This should be increased to
- * 65534 when Jens Axboe's patch for dynamically
- * determining max_sectors is merged.
- */
- max_sectors = ATA_MAX_SECTORS;
- if (dev->flags & ATA_DFLAG_LBA48)
- max_sectors = ATA_MAX_SECTORS_LBA48;
- if (dev->max_sectors)
- max_sectors = dev->max_sectors;
-
- blk_queue_max_sectors(sdev->request_queue, max_sectors);
-
- /*
- * SATA DMA transfers must be multiples of 4 byte, so
- * we need to pad ATAPI transfers using an extra sg.
- * Decrement max hw segments accordingly.
- */
- if (dev->class == ATA_DEV_ATAPI) {
- request_queue_t *q = sdev->request_queue;
- blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
- }
-
- if (dev->flags & ATA_DFLAG_NCQ) {
- int depth;
-
- depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
- depth = min(ATA_MAX_QUEUE - 1, depth);
- scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
- }
-}
-
-/**
- * ata_scsi_slave_config - Set SCSI device attributes
- * @sdev: SCSI device to examine
- *
- * This is called before we actually start reading
- * and writing to the device, to configure certain
- * SCSI mid-layer behaviors.
- *
- * LOCKING:
- * Defined by SCSI layer. We don't really care.
- */
-
-int ata_scsi_slave_config(struct scsi_device *sdev)
-{
- struct ata_port *ap = ata_shost_to_port(sdev->host);
- struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
-
- ata_scsi_sdev_config(sdev);
-
- blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD);
-
- if (dev)
- ata_scsi_dev_config(sdev, dev);
-
- return 0; /* scsi layer doesn't check return value, sigh */
-}
-
-/**
- * ata_scsi_slave_destroy - SCSI device is about to be destroyed
- * @sdev: SCSI device to be destroyed
- *
- * @sdev is about to be destroyed for hot/warm unplugging. If
- * this unplugging was initiated by libata as indicated by NULL
- * dev->sdev, this function doesn't have to do anything.
- * Otherwise, SCSI layer initiated warm-unplug is in progress.
- * Clear dev->sdev, schedule the device for ATA detach and invoke
- * EH.
- *
- * LOCKING:
- * Defined by SCSI layer. We don't really care.
- */
-void ata_scsi_slave_destroy(struct scsi_device *sdev)
-{
- struct ata_port *ap = ata_shost_to_port(sdev->host);
- unsigned long flags;
- struct ata_device *dev;
-
- if (!ap->ops->error_handler)
- return;
-
- spin_lock_irqsave(ap->lock, flags);
- dev = __ata_scsi_find_dev(ap, sdev);
- if (dev && dev->sdev) {
- /* SCSI device already in CANCEL state, no need to offline it */
- dev->sdev = NULL;
- dev->flags |= ATA_DFLAG_DETACH;
- ata_port_schedule_eh(ap);
- }
- spin_unlock_irqrestore(ap->lock, flags);
-}
-
-/**
- * ata_scsi_change_queue_depth - SCSI callback for queue depth config
- * @sdev: SCSI device to configure queue depth for
- * @queue_depth: new queue depth
- *
- * This is libata standard hostt->change_queue_depth callback.
- * SCSI will call into this callback when user tries to set queue
- * depth via sysfs.
- *
- * LOCKING:
- * SCSI layer (we don't care)
- *
- * RETURNS:
- * Newly configured queue depth.
- */
-int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
-{
- struct ata_port *ap = ata_shost_to_port(sdev->host);
- struct ata_device *dev;
- int max_depth;
-
- if (queue_depth < 1)
- return sdev->queue_depth;
-
- dev = ata_scsi_find_dev(ap, sdev);
- if (!dev || !ata_dev_enabled(dev))
- return sdev->queue_depth;
-
- max_depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
- max_depth = min(ATA_MAX_QUEUE - 1, max_depth);
- if (queue_depth > max_depth)
- queue_depth = max_depth;
-
- scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
- return queue_depth;
-}
-
-/**
- * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
- * @qc: Storage for translated ATA taskfile
- * @scsicmd: SCSI command to translate
- *
- * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
- * (to start). Perhaps these commands should be preceded by
- * CHECK POWER MODE to see what power mode the device is already in.
- * [See SAT revision 5 at www.t10.org]
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- *
- * RETURNS:
- * Zero on success, non-zero on error.
- */
-
-static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc,
- const u8 *scsicmd)
-{
- struct ata_taskfile *tf = &qc->tf;
-
- tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
- tf->protocol = ATA_PROT_NODATA;
- if (scsicmd[1] & 0x1) {
- ; /* ignore IMMED bit, violates sat-r05 */
- }
- if (scsicmd[4] & 0x2)
- goto invalid_fld; /* LOEJ bit set not supported */
- if (((scsicmd[4] >> 4) & 0xf) != 0)
- goto invalid_fld; /* power conditions not supported */
- if (scsicmd[4] & 0x1) {
- tf->nsect = 1; /* 1 sector, lba=0 */
-
- if (qc->dev->flags & ATA_DFLAG_LBA) {
- tf->flags |= ATA_TFLAG_LBA;
-
- tf->lbah = 0x0;
- tf->lbam = 0x0;
- tf->lbal = 0x0;
- tf->device |= ATA_LBA;
- } else {
- /* CHS */
- tf->lbal = 0x1; /* sect */
- tf->lbam = 0x0; /* cyl low */
- tf->lbah = 0x0; /* cyl high */
- }
-
- tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
- } else {
- tf->nsect = 0; /* time period value (0 implies now) */
- tf->command = ATA_CMD_STANDBY;
- /* Consider: ATA STANDBY IMMEDIATE command */
- }
- /*
- * Standby and Idle condition timers could be implemented but that
- * would require libata to implement the Power condition mode page
- * and allow the user to change it. Changing mode pages requires
- * MODE SELECT to be implemented.
- */
-
- return 0;
-
-invalid_fld:
- ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
- /* "Invalid field in cbd" */
- return 1;
-}
-
-
-/**
- * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
- * @qc: Storage for translated ATA taskfile
- * @scsicmd: SCSI command to translate (ignored)
- *
- * Sets up an ATA taskfile to issue FLUSH CACHE or
- * FLUSH CACHE EXT.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- *
- * RETURNS:
- * Zero on success, non-zero on error.
- */
-
-static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
-{
- struct ata_taskfile *tf = &qc->tf;
-
- tf->flags |= ATA_TFLAG_DEVICE;
- tf->protocol = ATA_PROT_NODATA;
-
- if ((qc->dev->flags & ATA_DFLAG_LBA48) &&
- (ata_id_has_flush_ext(qc->dev->id)))
- tf->command = ATA_CMD_FLUSH_EXT;
- else
- tf->command = ATA_CMD_FLUSH;
-
- return 0;
-}
-
-/**
- * scsi_6_lba_len - Get LBA and transfer length
- * @scsicmd: SCSI command to translate
- *
- * Calculate LBA and transfer length for 6-byte commands.
- *
- * RETURNS:
- * @plba: the LBA
- * @plen: the transfer length
- */
-
-static void scsi_6_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
-{
- u64 lba = 0;
- u32 len = 0;
-
- VPRINTK("six-byte command\n");
-
- lba |= ((u64)scsicmd[2]) << 8;
- lba |= ((u64)scsicmd[3]);
-
- len |= ((u32)scsicmd[4]);
-
- *plba = lba;
- *plen = len;
-}
-
-/**
- * scsi_10_lba_len - Get LBA and transfer length
- * @scsicmd: SCSI command to translate
- *
- * Calculate LBA and transfer length for 10-byte commands.
- *
- * RETURNS:
- * @plba: the LBA
- * @plen: the transfer length
- */
-
-static void scsi_10_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
-{
- u64 lba = 0;
- u32 len = 0;
-
- VPRINTK("ten-byte command\n");
-
- lba |= ((u64)scsicmd[2]) << 24;
- lba |= ((u64)scsicmd[3]) << 16;
- lba |= ((u64)scsicmd[4]) << 8;
- lba |= ((u64)scsicmd[5]);
-
- len |= ((u32)scsicmd[7]) << 8;
- len |= ((u32)scsicmd[8]);
-
- *plba = lba;
- *plen = len;
-}
-
-/**
- * scsi_16_lba_len - Get LBA and transfer length
- * @scsicmd: SCSI command to translate
- *
- * Calculate LBA and transfer length for 16-byte commands.
- *
- * RETURNS:
- * @plba: the LBA
- * @plen: the transfer length
- */
-
-static void scsi_16_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
-{
- u64 lba = 0;
- u32 len = 0;
-
- VPRINTK("sixteen-byte command\n");
-
- lba |= ((u64)scsicmd[2]) << 56;
- lba |= ((u64)scsicmd[3]) << 48;
- lba |= ((u64)scsicmd[4]) << 40;
- lba |= ((u64)scsicmd[5]) << 32;
- lba |= ((u64)scsicmd[6]) << 24;
- lba |= ((u64)scsicmd[7]) << 16;
- lba |= ((u64)scsicmd[8]) << 8;
- lba |= ((u64)scsicmd[9]);
-
- len |= ((u32)scsicmd[10]) << 24;
- len |= ((u32)scsicmd[11]) << 16;
- len |= ((u32)scsicmd[12]) << 8;
- len |= ((u32)scsicmd[13]);
-
- *plba = lba;
- *plen = len;
-}
-
-/**
- * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
- * @qc: Storage for translated ATA taskfile
- * @scsicmd: SCSI command to translate
- *
- * Converts SCSI VERIFY command to an ATA READ VERIFY command.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- *
- * RETURNS:
- * Zero on success, non-zero on error.
- */
-
-static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
-{
- struct ata_taskfile *tf = &qc->tf;
- struct ata_device *dev = qc->dev;
- u64 dev_sectors = qc->dev->n_sectors;
- u64 block;
- u32 n_block;
-
- tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
- tf->protocol = ATA_PROT_NODATA;
-
- if (scsicmd[0] == VERIFY)
- scsi_10_lba_len(scsicmd, &block, &n_block);
- else if (scsicmd[0] == VERIFY_16)
- scsi_16_lba_len(scsicmd, &block, &n_block);
- else
- goto invalid_fld;
-
- if (!n_block)
- goto nothing_to_do;
- if (block >= dev_sectors)
- goto out_of_range;
- if ((block + n_block) > dev_sectors)
- goto out_of_range;
-
- if (dev->flags & ATA_DFLAG_LBA) {
- tf->flags |= ATA_TFLAG_LBA;
-
- if (lba_28_ok(block, n_block)) {
- /* use LBA28 */
- tf->command = ATA_CMD_VERIFY;
- tf->device |= (block >> 24) & 0xf;
- } else if (lba_48_ok(block, n_block)) {
- if (!(dev->flags & ATA_DFLAG_LBA48))
- goto out_of_range;
-
- /* use LBA48 */
- tf->flags |= ATA_TFLAG_LBA48;
- tf->command = ATA_CMD_VERIFY_EXT;
-
- 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 */
- goto out_of_range;
-
- 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;
-
- if (!lba_28_ok(block, n_block))
- goto out_of_range;
-
- /* 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))
- goto out_of_range;
-
- tf->command = ATA_CMD_VERIFY;
- 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;
-
-invalid_fld:
- ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
- /* "Invalid field in cbd" */
- return 1;
-
-out_of_range:
- ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0);
- /* "Logical Block Address out of range" */
- return 1;
-
-nothing_to_do:
- qc->scsicmd->result = SAM_STAT_GOOD;
- return 1;
-}
-
-/**
- * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
- * @qc: Storage for translated ATA taskfile
- * @scsicmd: SCSI command to translate
- *
- * Converts any of six SCSI read/write commands into the
- * ATA counterpart, including starting sector (LBA),
- * sector count, and taking into account the device's LBA48
- * support.
- *
- * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
- * %WRITE_16 are currently supported.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- *
- * RETURNS:
- * Zero on success, non-zero on error.
- */
-
-static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
-{
- struct ata_taskfile *tf = &qc->tf;
- struct ata_device *dev = qc->dev;
- u64 block;
- u32 n_block;
-
- qc->flags |= ATA_QCFLAG_IO;
- tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
-
- if (scsicmd[0] == WRITE_10 || scsicmd[0] == WRITE_6 ||
- scsicmd[0] == WRITE_16)
- tf->flags |= ATA_TFLAG_WRITE;
-
- /* Calculate the SCSI LBA, transfer length and FUA. */
- switch (scsicmd[0]) {
- case READ_10:
- case WRITE_10:
- scsi_10_lba_len(scsicmd, &block, &n_block);
- if (unlikely(scsicmd[1] & (1 << 3)))
- tf->flags |= ATA_TFLAG_FUA;
- break;
- case READ_6:
- case WRITE_6:
- scsi_6_lba_len(scsicmd, &block, &n_block);
-
- /* for 6-byte r/w commands, transfer length 0
- * means 256 blocks of data, not 0 block.
- */
- if (!n_block)
- n_block = 256;
- break;
- case READ_16:
- case WRITE_16:
- scsi_16_lba_len(scsicmd, &block, &n_block);
- if (unlikely(scsicmd[1] & (1 << 3)))
- tf->flags |= ATA_TFLAG_FUA;
- break;
- default:
- DPRINTK("no-byte command\n");
- goto invalid_fld;
- }
-
- /* Check and compose ATA command */
- if (!n_block)
- /* For 10-byte and 16-byte SCSI R/W commands, transfer
- * length 0 means transfer 0 block of data.
- * However, for ATA R/W commands, sector count 0 means
- * 256 or 65536 sectors, not 0 sectors as in SCSI.
- *
- * WARNING: one or two older ATA drives treat 0 as 0...
- */
- goto nothing_to_do;
-
- if ((dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ) {
- /* yay, NCQ */
- if (!lba_48_ok(block, n_block))
- goto out_of_range;
-
- 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;
-
- qc->nsect = n_block;
-
- tf->nsect = qc->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))
- goto out_of_range;
-
- /* 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 */
- goto out_of_range;
-
- if (unlikely(ata_rwcmd_protocol(qc) < 0))
- goto invalid_fld;
-
- qc->nsect = n_block;
- 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))
- goto out_of_range;
-
- if (unlikely(ata_rwcmd_protocol(qc) < 0))
- goto invalid_fld;
-
- /* 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))
- goto out_of_range;
-
- qc->nsect = n_block;
- 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;
-
-invalid_fld:
- ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
- /* "Invalid field in cbd" */
- return 1;
-
-out_of_range:
- ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0);
- /* "Logical Block Address out of range" */
- return 1;
-
-nothing_to_do:
- qc->scsicmd->result = SAM_STAT_GOOD;
- return 1;
-}
-
-static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
-{
- struct scsi_cmnd *cmd = qc->scsicmd;
- u8 *cdb = cmd->cmnd;
- int need_sense = (qc->err_mask != 0);
-
- /* We snoop the SET_FEATURES - Write Cache ON/OFF command, and
- * schedule EH_REVALIDATE operation to update the IDENTIFY DEVICE
- * cache
- */
- if (!need_sense && (qc->tf.command == ATA_CMD_SET_FEATURES) &&
- ((qc->tf.feature == SETFEATURES_WC_ON) ||
- (qc->tf.feature == SETFEATURES_WC_OFF))) {
- qc->ap->eh_info.action |= ATA_EH_REVALIDATE;
- ata_port_schedule_eh(qc->ap);
- }
-
- /* For ATA pass thru (SAT) commands, generate a sense block if
- * user mandated it or if there's an error. Note that if we
- * generate because the user forced us to, a check condition
- * is generated and the ATA register values are returned
- * whether the command completed successfully or not. If there
- * was no error, SK, ASC and ASCQ will all be zero.
- */
- if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
- ((cdb[2] & 0x20) || need_sense)) {
- ata_gen_ata_desc_sense(qc);
- } else {
- if (!need_sense) {
- cmd->result = SAM_STAT_GOOD;
- } else {
- /* TODO: decide which descriptor format to use
- * for 48b LBA devices and call that here
- * instead of the fixed desc, which is only
- * good for smaller LBA (and maybe CHS?)
- * devices.
- */
- ata_gen_fixed_sense(qc);
- }
- }
-
- if (need_sense && !qc->ap->ops->error_handler)
- ata_dump_status(qc->ap->id, &qc->result_tf);
-
- qc->scsidone(cmd);
-
- ata_qc_free(qc);
-}
-
-/**
- * ata_scmd_need_defer - Check whether we need to defer scmd
- * @dev: ATA device to which the command is addressed
- * @is_io: Is the command IO (and thus possibly NCQ)?
- *
- * NCQ and non-NCQ commands cannot run together. As upper layer
- * only knows the queue depth, we are responsible for maintaining
- * exclusion. This function checks whether a new command can be
- * issued to @dev.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- *
- * RETURNS:
- * 1 if deferring is needed, 0 otherwise.
- */
-static int ata_scmd_need_defer(struct ata_device *dev, int is_io)
-{
- struct ata_port *ap = dev->ap;
-
- if (!(dev->flags & ATA_DFLAG_NCQ))
- return 0;
-
- if (is_io) {
- if (!ata_tag_valid(ap->active_tag))
- return 0;
- } else {
- if (!ata_tag_valid(ap->active_tag) && !ap->sactive)
- return 0;
- }
- return 1;
-}
-
-/**
- * ata_scsi_translate - Translate then issue SCSI command to ATA device
- * @dev: ATA device to which the command is addressed
- * @cmd: SCSI command to execute
- * @done: SCSI command completion function
- * @xlat_func: Actor which translates @cmd to an ATA taskfile
- *
- * Our ->queuecommand() function has decided that the SCSI
- * command issued can be directly translated into an ATA
- * command, rather than handled internally.
- *
- * This function sets up an ata_queued_cmd structure for the
- * SCSI command, and sends that ata_queued_cmd to the hardware.
- *
- * The xlat_func argument (actor) returns 0 if ready to execute
- * ATA command, else 1 to finish translation. If 1 is returned
- * then cmd->result (and possibly cmd->sense_buffer) are assumed
- * to be set reflecting an error condition or clean (early)
- * termination.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- *
- * RETURNS:
- * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
- * needs to be deferred.
- */
-static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
- void (*done)(struct scsi_cmnd *),
- ata_xlat_func_t xlat_func)
-{
- struct ata_queued_cmd *qc;
- u8 *scsicmd = cmd->cmnd;
- int is_io = xlat_func == ata_scsi_rw_xlat;
-
- VPRINTK("ENTER\n");
-
- if (unlikely(ata_scmd_need_defer(dev, is_io)))
- goto defer;
-
- qc = ata_scsi_qc_new(dev, cmd, done);
- if (!qc)
- goto err_mem;
-
- /* data is present; dma-map it */
- if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
- cmd->sc_data_direction == DMA_TO_DEVICE) {
- if (unlikely(cmd->request_bufflen < 1)) {
- ata_dev_printk(dev, KERN_WARNING,
- "WARNING: zero len r/w req\n");
- goto err_did;
- }
-
- if (cmd->use_sg)
- ata_sg_init(qc, cmd->request_buffer, cmd->use_sg);
- else
- ata_sg_init_one(qc, cmd->request_buffer,
- cmd->request_bufflen);
-
- qc->dma_dir = cmd->sc_data_direction;
- }
-
- qc->complete_fn = ata_scsi_qc_complete;
-
- if (xlat_func(qc, scsicmd))
- goto early_finish;
-
- /* select device, send command to hardware */
- ata_qc_issue(qc);
-
- VPRINTK("EXIT\n");
- return 0;
-
-early_finish:
- ata_qc_free(qc);
- done(cmd);
- DPRINTK("EXIT - early finish (good or error)\n");
- return 0;
-
-err_did:
- ata_qc_free(qc);
-err_mem:
- cmd->result = (DID_ERROR << 16);
- done(cmd);
- DPRINTK("EXIT - internal\n");
- return 0;
-
-defer:
- DPRINTK("EXIT - defer\n");
- return SCSI_MLQUEUE_DEVICE_BUSY;
-}
-
-/**
- * ata_scsi_rbuf_get - Map response buffer.
- * @cmd: SCSI command containing buffer to be mapped.
- * @buf_out: Pointer to mapped area.
- *
- * Maps buffer contained within SCSI command @cmd.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- *
- * RETURNS:
- * Length of response buffer.
- */
-
-static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
-{
- u8 *buf;
- unsigned int buflen;
-
- if (cmd->use_sg) {
- struct scatterlist *sg;
-
- sg = (struct scatterlist *) cmd->request_buffer;
- buf = kmap_atomic(sg->page, KM_USER0) + sg->offset;
- buflen = sg->length;
- } else {
- buf = cmd->request_buffer;
- buflen = cmd->request_bufflen;
- }
-
- *buf_out = buf;
- return buflen;
-}
-
-/**
- * ata_scsi_rbuf_put - Unmap response buffer.
- * @cmd: SCSI command containing buffer to be unmapped.
- * @buf: buffer to unmap
- *
- * Unmaps response buffer contained within @cmd.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- */
-
-static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
-{
- if (cmd->use_sg) {
- struct scatterlist *sg;
-
- sg = (struct scatterlist *) cmd->request_buffer;
- kunmap_atomic(buf - sg->offset, KM_USER0);
- }
-}
-
-/**
- * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
- * @args: device IDENTIFY data / SCSI command of interest.
- * @actor: Callback hook for desired SCSI command simulator
- *
- * Takes care of the hard work of simulating a SCSI command...
- * Mapping the response buffer, calling the command's handler,
- * and handling the handler's return value. This return value
- * indicates whether the handler wishes the SCSI command to be
- * completed successfully (0), or not (in which case cmd->result
- * and sense buffer are assumed to be set).
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- */
-
-void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
- unsigned int (*actor) (struct ata_scsi_args *args,
- u8 *rbuf, unsigned int buflen))
-{
- u8 *rbuf;
- unsigned int buflen, rc;
- struct scsi_cmnd *cmd = args->cmd;
-
- buflen = ata_scsi_rbuf_get(cmd, &rbuf);
- memset(rbuf, 0, buflen);
- rc = actor(args, rbuf, buflen);
- ata_scsi_rbuf_put(cmd, rbuf);
-
- if (rc == 0)
- cmd->result = SAM_STAT_GOOD;
- args->done(cmd);
-}
-
-/**
- * ata_scsiop_inq_std - Simulate INQUIRY command
- * @args: device IDENTIFY data / SCSI command of interest.
- * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
- * @buflen: Response buffer length.
- *
- * Returns standard device identification data associated
- * with non-VPD INQUIRY command output.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- */
-
-unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
- unsigned int buflen)
-{
- u8 hdr[] = {
- TYPE_DISK,
- 0,
- 0x5, /* claim SPC-3 version compatibility */
- 2,
- 95 - 4
- };
-
- /* set scsi removeable (RMB) bit per ata bit */
- if (ata_id_removeable(args->id))
- hdr[1] |= (1 << 7);
-
- VPRINTK("ENTER\n");
-
- memcpy(rbuf, hdr, sizeof(hdr));
-
- if (buflen > 35) {
- memcpy(&rbuf[8], "ATA ", 8);
- ata_id_string(args->id, &rbuf[16], ATA_ID_PROD_OFS, 16);
- ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV_OFS, 4);
- if (rbuf[32] == 0 || rbuf[32] == ' ')
- memcpy(&rbuf[32], "n/a ", 4);
- }
-
- if (buflen > 63) {
- const u8 versions[] = {
- 0x60, /* SAM-3 (no version claimed) */
-
- 0x03,
- 0x20, /* SBC-2 (no version claimed) */
-
- 0x02,
- 0x60 /* SPC-3 (no version claimed) */
- };
-
- memcpy(rbuf + 59, versions, sizeof(versions));
- }
-
- return 0;
-}
-
-/**
- * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
- * @args: device IDENTIFY data / SCSI command of interest.
- * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
- * @buflen: Response buffer length.
- *
- * Returns list of inquiry VPD pages available.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- */
-
-unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
- unsigned int buflen)
-{
- const u8 pages[] = {
- 0x00, /* page 0x00, this page */
- 0x80, /* page 0x80, unit serial no page */
- 0x83 /* page 0x83, device ident page */
- };
- rbuf[3] = sizeof(pages); /* number of supported VPD pages */
-
- if (buflen > 6)
- memcpy(rbuf + 4, pages, sizeof(pages));
-
- return 0;
-}
-
-/**
- * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
- * @args: device IDENTIFY data / SCSI command of interest.
- * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
- * @buflen: Response buffer length.
- *
- * Returns ATA device serial number.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- */
-
-unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
- unsigned int buflen)
-{
- const u8 hdr[] = {
- 0,
- 0x80, /* this page code */
- 0,
- ATA_SERNO_LEN, /* page len */
- };
- memcpy(rbuf, hdr, sizeof(hdr));
-
- if (buflen > (ATA_SERNO_LEN + 4 - 1))
- ata_id_string(args->id, (unsigned char *) &rbuf[4],
- ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
-
- return 0;
-}
-
-/**
- * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
- * @args: device IDENTIFY data / SCSI command of interest.
- * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
- * @buflen: Response buffer length.
- *
- * Yields two logical unit device identification designators:
- * - vendor specific ASCII containing the ATA serial number
- * - SAT defined "t10 vendor id based" containing ASCII vendor
- * name ("ATA "), model and serial numbers.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- */
-
-unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
- unsigned int buflen)
-{
- int num;
- const int sat_model_serial_desc_len = 68;
- const int ata_model_byte_len = 40;
-
- rbuf[1] = 0x83; /* this page code */
- num = 4;
-
- if (buflen > (ATA_SERNO_LEN + num + 3)) {
- /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
- rbuf[num + 0] = 2;
- rbuf[num + 3] = ATA_SERNO_LEN;
- num += 4;
- ata_id_string(args->id, (unsigned char *) rbuf + num,
- ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
- num += ATA_SERNO_LEN;
- }
- if (buflen > (sat_model_serial_desc_len + num + 3)) {
- /* SAT defined lu model and serial numbers descriptor */
- /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
- rbuf[num + 0] = 2;
- rbuf[num + 1] = 1;
- rbuf[num + 3] = sat_model_serial_desc_len;
- num += 4;
- memcpy(rbuf + num, "ATA ", 8);
- num += 8;
- ata_id_string(args->id, (unsigned char *) rbuf + num,
- ATA_ID_PROD_OFS, ata_model_byte_len);
- num += ata_model_byte_len;
- ata_id_string(args->id, (unsigned char *) rbuf + num,
- ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
- num += ATA_SERNO_LEN;
- }
- rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
- return 0;
-}
-
-/**
- * ata_scsiop_noop - Command handler that simply returns success.
- * @args: device IDENTIFY data / SCSI command of interest.
- * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
- * @buflen: Response buffer length.
- *
- * No operation. Simply returns success to caller, to indicate
- * that the caller should successfully complete this SCSI command.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- */
-
-unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
- unsigned int buflen)
-{
- VPRINTK("ENTER\n");
- return 0;
-}
-
-/**
- * ata_msense_push - Push data onto MODE SENSE data output buffer
- * @ptr_io: (input/output) Location to store more output data
- * @last: End of output data buffer
- * @buf: Pointer to BLOB being added to output buffer
- * @buflen: Length of BLOB
- *
- * Store MODE SENSE data on an output buffer.
- *
- * LOCKING:
- * None.
- */
-
-static void ata_msense_push(u8 **ptr_io, const u8 *last,
- const u8 *buf, unsigned int buflen)
-{
- u8 *ptr = *ptr_io;
-
- if ((ptr + buflen - 1) > last)
- return;
-
- memcpy(ptr, buf, buflen);
-
- ptr += buflen;
-
- *ptr_io = ptr;
-}
-
-/**
- * ata_msense_caching - Simulate MODE SENSE caching info page
- * @id: device IDENTIFY data
- * @ptr_io: (input/output) Location to store more output data
- * @last: End of output data buffer
- *
- * Generate a caching info page, which conditionally indicates
- * write caching to the SCSI layer, depending on device
- * capabilities.
- *
- * LOCKING:
- * None.
- */
-
-static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
- const u8 *last)
-{
- u8 page[CACHE_MPAGE_LEN];
-
- memcpy(page, def_cache_mpage, sizeof(page));
- if (ata_id_wcache_enabled(id))
- page[2] |= (1 << 2); /* write cache enable */
- if (!ata_id_rahead_enabled(id))
- page[12] |= (1 << 5); /* disable read ahead */
-
- ata_msense_push(ptr_io, last, page, sizeof(page));
- return sizeof(page);
-}
-
-/**
- * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
- * @dev: Device associated with this MODE SENSE command
- * @ptr_io: (input/output) Location to store more output data
- * @last: End of output data buffer
- *
- * Generate a generic MODE SENSE control mode page.
- *
- * LOCKING:
- * None.
- */
-
-static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
-{
- ata_msense_push(ptr_io, last, def_control_mpage,
- sizeof(def_control_mpage));
- return sizeof(def_control_mpage);
-}
-
-/**
- * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
- * @dev: Device associated with this MODE SENSE command
- * @ptr_io: (input/output) Location to store more output data
- * @last: End of output data buffer
- *
- * Generate a generic MODE SENSE r/w error recovery page.
- *
- * LOCKING:
- * None.
- */
-
-static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
-{
-
- ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
- sizeof(def_rw_recovery_mpage));
- return sizeof(def_rw_recovery_mpage);
-}
-
-/*
- * We can turn this into a real blacklist if it's needed, for now just
- * blacklist any Maxtor BANC1G10 revision firmware
- */
-static int ata_dev_supports_fua(u16 *id)
-{
- unsigned char model[41], fw[9];
-
- if (!libata_fua)
- return 0;
- if (!ata_id_has_fua(id))
- return 0;
-
- ata_id_c_string(id, model, ATA_ID_PROD_OFS, sizeof(model));
- ata_id_c_string(id, fw, ATA_ID_FW_REV_OFS, sizeof(fw));
-
- if (strcmp(model, "Maxtor"))
- return 1;
- if (strcmp(fw, "BANC1G10"))
- return 1;
-
- return 0; /* blacklisted */
-}
-
-/**
- * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
- * @args: device IDENTIFY data / SCSI command of interest.
- * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
- * @buflen: Response buffer length.
- *
- * Simulate MODE SENSE commands. Assume this is invoked for direct
- * access devices (e.g. disks) only. There should be no block
- * descriptor for other device types.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- */
-
-unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
- unsigned int buflen)
-{
- struct ata_device *dev = args->dev;
- u8 *scsicmd = args->cmd->cmnd, *p, *last;
- const u8 sat_blk_desc[] = {
- 0, 0, 0, 0, /* number of blocks: sat unspecified */
- 0,
- 0, 0x2, 0x0 /* block length: 512 bytes */
- };
- u8 pg, spg;
- unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
- u8 dpofua;
-
- VPRINTK("ENTER\n");
-
- six_byte = (scsicmd[0] == MODE_SENSE);
- ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
- /*
- * LLBA bit in msense(10) ignored (compliant)
- */
-
- page_control = scsicmd[2] >> 6;
- switch (page_control) {
- case 0: /* current */
- break; /* supported */
- case 3: /* saved */
- goto saving_not_supp;
- case 1: /* changeable */
- case 2: /* defaults */
- default:
- goto invalid_fld;
- }
-
- if (six_byte) {
- output_len = 4 + (ebd ? 8 : 0);
- alloc_len = scsicmd[4];
- } else {
- output_len = 8 + (ebd ? 8 : 0);
- alloc_len = (scsicmd[7] << 8) + scsicmd[8];
- }
- minlen = (alloc_len < buflen) ? alloc_len : buflen;
-
- p = rbuf + output_len;
- last = rbuf + minlen - 1;
-
- pg = scsicmd[2] & 0x3f;
- spg = scsicmd[3];
- /*
- * No mode subpages supported (yet) but asking for _all_
- * subpages may be valid
- */
- if (spg && (spg != ALL_SUB_MPAGES))
- goto invalid_fld;
-
- switch(pg) {
- case RW_RECOVERY_MPAGE:
- output_len += ata_msense_rw_recovery(&p, last);
- break;
-
- case CACHE_MPAGE:
- output_len += ata_msense_caching(args->id, &p, last);
- break;
-
- case CONTROL_MPAGE: {
- output_len += ata_msense_ctl_mode(&p, last);
- break;
- }
-
- case ALL_MPAGES:
- output_len += ata_msense_rw_recovery(&p, last);
- output_len += ata_msense_caching(args->id, &p, last);
- output_len += ata_msense_ctl_mode(&p, last);
- break;
-
- default: /* invalid page code */
- goto invalid_fld;
- }
-
- if (minlen < 1)
- return 0;
-
- dpofua = 0;
- if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
- (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
- dpofua = 1 << 4;
-
- if (six_byte) {
- output_len--;
- rbuf[0] = output_len;
- if (minlen > 2)
- rbuf[2] |= dpofua;
- if (ebd) {
- if (minlen > 3)
- rbuf[3] = sizeof(sat_blk_desc);
- if (minlen > 11)
- memcpy(rbuf + 4, sat_blk_desc,
- sizeof(sat_blk_desc));
- }
- } else {
- output_len -= 2;
- rbuf[0] = output_len >> 8;
- if (minlen > 1)
- rbuf[1] = output_len;
- if (minlen > 3)
- rbuf[3] |= dpofua;
- if (ebd) {
- if (minlen > 7)
- rbuf[7] = sizeof(sat_blk_desc);
- if (minlen > 15)
- memcpy(rbuf + 8, sat_blk_desc,
- sizeof(sat_blk_desc));
- }
- }
- return 0;
-
-invalid_fld:
- ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
- /* "Invalid field in cbd" */
- return 1;
-
-saving_not_supp:
- ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
- /* "Saving parameters not supported" */
- return 1;
-}
-
-/**
- * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
- * @args: device IDENTIFY data / SCSI command of interest.
- * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
- * @buflen: Response buffer length.
- *
- * Simulate READ CAPACITY commands.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- */
-
-unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
- unsigned int buflen)
-{
- u64 n_sectors;
- u32 tmp;
-
- VPRINTK("ENTER\n");
-
- if (ata_id_has_lba(args->id)) {
- if (ata_id_has_lba48(args->id))
- n_sectors = ata_id_u64(args->id, 100);
- else
- n_sectors = ata_id_u32(args->id, 60);
- } else {
- /* CHS default translation */
- n_sectors = args->id[1] * args->id[3] * args->id[6];
-
- if (ata_id_current_chs_valid(args->id))
- /* CHS current translation */
- n_sectors = ata_id_u32(args->id, 57);
- }
-
- n_sectors--; /* ATA TotalUserSectors - 1 */
-
- if (args->cmd->cmnd[0] == READ_CAPACITY) {
- if( n_sectors >= 0xffffffffULL )
- tmp = 0xffffffff ; /* Return max count on overflow */
- else
- tmp = n_sectors ;
-
- /* sector count, 32-bit */
- rbuf[0] = tmp >> (8 * 3);
- rbuf[1] = tmp >> (8 * 2);
- rbuf[2] = tmp >> (8 * 1);
- rbuf[3] = tmp;
-
- /* sector size */
- tmp = ATA_SECT_SIZE;
- rbuf[6] = tmp >> 8;
- rbuf[7] = tmp;
-
- } else {
- /* sector count, 64-bit */
- tmp = n_sectors >> (8 * 4);
- rbuf[2] = tmp >> (8 * 3);
- rbuf[3] = tmp >> (8 * 2);
- rbuf[4] = tmp >> (8 * 1);
- rbuf[5] = tmp;
- tmp = n_sectors;
- rbuf[6] = tmp >> (8 * 3);
- rbuf[7] = tmp >> (8 * 2);
- rbuf[8] = tmp >> (8 * 1);
- rbuf[9] = tmp;
-
- /* sector size */
- tmp = ATA_SECT_SIZE;
- rbuf[12] = tmp >> 8;
- rbuf[13] = tmp;
- }
-
- return 0;
-}
-
-/**
- * ata_scsiop_report_luns - Simulate REPORT LUNS command
- * @args: device IDENTIFY data / SCSI command of interest.
- * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
- * @buflen: Response buffer length.
- *
- * Simulate REPORT LUNS command.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- */
-
-unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
- unsigned int buflen)
-{
- VPRINTK("ENTER\n");
- rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
-
- return 0;
-}
-
-/**
- * ata_scsi_set_sense - Set SCSI sense data and status
- * @cmd: SCSI request to be handled
- * @sk: SCSI-defined sense key
- * @asc: SCSI-defined additional sense code
- * @ascq: SCSI-defined additional sense code qualifier
- *
- * Helper function that builds a valid fixed format, current
- * response code and the given sense key (sk), additional sense
- * code (asc) and additional sense code qualifier (ascq) with
- * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
- * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
- *
- * LOCKING:
- * Not required
- */
-
-void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
-{
- cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
-
- cmd->sense_buffer[0] = 0x70; /* fixed format, current */
- cmd->sense_buffer[2] = sk;
- cmd->sense_buffer[7] = 18 - 8; /* additional sense length */
- cmd->sense_buffer[12] = asc;
- cmd->sense_buffer[13] = ascq;
-}
-
-/**
- * ata_scsi_badcmd - End a SCSI request with an error
- * @cmd: SCSI request to be handled
- * @done: SCSI command completion function
- * @asc: SCSI-defined additional sense code
- * @ascq: SCSI-defined additional sense code qualifier
- *
- * Helper function that completes a SCSI command with
- * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
- * and the specified additional sense codes.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- */
-
-void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
-{
- DPRINTK("ENTER\n");
- ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
-
- done(cmd);
-}
-
-static void atapi_sense_complete(struct ata_queued_cmd *qc)
-{
- if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
- /* FIXME: not quite right; we don't want the
- * translation of taskfile registers into
- * a sense descriptors, since that's only
- * correct for ATA, not ATAPI
- */
- ata_gen_ata_desc_sense(qc);
- }
-
- qc->scsidone(qc->scsicmd);
- ata_qc_free(qc);
-}
-
-/* is it pointless to prefer PIO for "safety reasons"? */
-static inline int ata_pio_use_silly(struct ata_port *ap)
-{
- return (ap->flags & ATA_FLAG_PIO_DMA);
-}
-
-static void atapi_request_sense(struct ata_queued_cmd *qc)
-{
- struct ata_port *ap = qc->ap;
- struct scsi_cmnd *cmd = qc->scsicmd;
-
- DPRINTK("ATAPI request sense\n");
-
- /* FIXME: is this needed? */
- memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
-
- ap->ops->tf_read(ap, &qc->tf);
-
- /* fill these in, for the case where they are -not- overwritten */
- cmd->sense_buffer[0] = 0x70;
- cmd->sense_buffer[2] = qc->tf.feature >> 4;
-
- ata_qc_reinit(qc);
-
- ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
- qc->dma_dir = DMA_FROM_DEVICE;
-
- memset(&qc->cdb, 0, qc->dev->cdb_len);
- qc->cdb[0] = REQUEST_SENSE;
- qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
-
- qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
- qc->tf.command = ATA_CMD_PACKET;
-
- if (ata_pio_use_silly(ap)) {
- qc->tf.protocol = ATA_PROT_ATAPI_DMA;
- qc->tf.feature |= ATAPI_PKT_DMA;
- } else {
- qc->tf.protocol = ATA_PROT_ATAPI;
- qc->tf.lbam = (8 * 1024) & 0xff;
- qc->tf.lbah = (8 * 1024) >> 8;
- }
- qc->nbytes = SCSI_SENSE_BUFFERSIZE;
-
- qc->complete_fn = atapi_sense_complete;
-
- ata_qc_issue(qc);
-
- DPRINTK("EXIT\n");
-}
-
-static void atapi_qc_complete(struct ata_queued_cmd *qc)
-{
- struct scsi_cmnd *cmd = qc->scsicmd;
- unsigned int err_mask = qc->err_mask;
-
- VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
-
- /* handle completion from new EH */
- if (unlikely(qc->ap->ops->error_handler &&
- (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
-
- if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
- /* FIXME: not quite right; we don't want the
- * translation of taskfile registers into a
- * sense descriptors, since that's only
- * correct for ATA, not ATAPI
- */
- ata_gen_ata_desc_sense(qc);
- }
-
- /* SCSI EH automatically locks door if sdev->locked is
- * set. Sometimes door lock request continues to
- * fail, for example, when no media is present. This
- * creates a loop - SCSI EH issues door lock which
- * fails and gets invoked again to acquire sense data
- * for the failed command.
- *
- * If door lock fails, always clear sdev->locked to
- * avoid this infinite loop.
- */
- if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
- qc->dev->sdev->locked = 0;
-
- qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
- qc->scsidone(cmd);
- ata_qc_free(qc);
- return;
- }
-
- /* successful completion or old EH failure path */
- if (unlikely(err_mask & AC_ERR_DEV)) {
- cmd->result = SAM_STAT_CHECK_CONDITION;
- atapi_request_sense(qc);
- return;
- } else if (unlikely(err_mask)) {
- /* FIXME: not quite right; we don't want the
- * translation of taskfile registers into
- * a sense descriptors, since that's only
- * correct for ATA, not ATAPI
- */
- ata_gen_ata_desc_sense(qc);
- } else {
- u8 *scsicmd = cmd->cmnd;
-
- if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
- u8 *buf = NULL;
- unsigned int buflen;
-
- buflen = ata_scsi_rbuf_get(cmd, &buf);
-
- /* ATAPI devices typically report zero for their SCSI version,
- * and sometimes deviate from the spec WRT response data
- * format. If SCSI version is reported as zero like normal,
- * then we make the following fixups: 1) Fake MMC-5 version,
- * to indicate to the Linux scsi midlayer this is a modern
- * device. 2) Ensure response data format / ATAPI information
- * are always correct.
- */
- if (buf[2] == 0) {
- buf[2] = 0x5;
- buf[3] = 0x32;
- }
-
- ata_scsi_rbuf_put(cmd, buf);
- }
-
- cmd->result = SAM_STAT_GOOD;
- }
-
- qc->scsidone(cmd);
- ata_qc_free(qc);
-}
-/**
- * atapi_xlat - Initialize PACKET taskfile
- * @qc: command structure to be initialized
- * @scsicmd: SCSI CDB associated with this PACKET command
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- *
- * RETURNS:
- * Zero on success, non-zero on failure.
- */
-
-static unsigned int atapi_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
-{
- struct scsi_cmnd *cmd = qc->scsicmd;
- struct ata_device *dev = qc->dev;
- int using_pio = (dev->flags & ATA_DFLAG_PIO);
- int nodata = (cmd->sc_data_direction == DMA_NONE);
-
- if (!using_pio)
- /* Check whether ATAPI DMA is safe */
- if (ata_check_atapi_dma(qc))
- using_pio = 1;
-
- memcpy(&qc->cdb, scsicmd, dev->cdb_len);
-
- qc->complete_fn = atapi_qc_complete;
-
- qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
- if (cmd->sc_data_direction == DMA_TO_DEVICE) {
- qc->tf.flags |= ATA_TFLAG_WRITE;
- DPRINTK("direction: write\n");
- }
-
- qc->tf.command = ATA_CMD_PACKET;
-
- /* no data, or PIO data xfer */
- if (using_pio || nodata) {
- if (nodata)
- qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
- else
- qc->tf.protocol = ATA_PROT_ATAPI;
- qc->tf.lbam = (8 * 1024) & 0xff;
- qc->tf.lbah = (8 * 1024) >> 8;
- }
-
- /* DMA data xfer */
- else {
- qc->tf.protocol = ATA_PROT_ATAPI_DMA;
- qc->tf.feature |= ATAPI_PKT_DMA;
-
- if (atapi_dmadir && (cmd->sc_data_direction != DMA_TO_DEVICE))
- /* some SATA bridges need us to indicate data xfer direction */
- qc->tf.feature |= ATAPI_DMADIR;
- }
-
- qc->nbytes = cmd->request_bufflen;
-
- return 0;
-}
-
-static struct ata_device * ata_find_dev(struct ata_port *ap, int id)
-{
- if (likely(id < ATA_MAX_DEVICES))
- return &ap->device[id];
- return NULL;
-}
-
-static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
- const struct scsi_device *scsidev)
-{
- /* skip commands not addressed to targets we simulate */
- if (unlikely(scsidev->channel || scsidev->lun))
- return NULL;
-
- return ata_find_dev(ap, scsidev->id);
-}
-
-/**
- * ata_scsi_dev_enabled - determine if device is enabled
- * @dev: ATA device
- *
- * Determine if commands should be sent to the specified device.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- *
- * RETURNS:
- * 0 if commands are not allowed / 1 if commands are allowed
- */
-
-static int ata_scsi_dev_enabled(struct ata_device *dev)
-{
- if (unlikely(!ata_dev_enabled(dev)))
- return 0;
-
- if (!atapi_enabled || (dev->ap->flags & ATA_FLAG_NO_ATAPI)) {
- if (unlikely(dev->class == ATA_DEV_ATAPI)) {
- ata_dev_printk(dev, KERN_WARNING,
- "WARNING: ATAPI is %s, device ignored.\n",
- atapi_enabled ? "not supported with this driver" : "disabled");
- return 0;
- }
- }
-
- return 1;
-}
-
-/**
- * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
- * @ap: ATA port to which the device is attached
- * @scsidev: SCSI device from which we derive the ATA device
- *
- * Given various information provided in struct scsi_cmnd,
- * map that onto an ATA bus, and using that mapping
- * determine which ata_device is associated with the
- * SCSI command to be sent.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- *
- * RETURNS:
- * Associated ATA device, or %NULL if not found.
- */
-static struct ata_device *
-ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
-{
- struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
-
- if (unlikely(!dev || !ata_scsi_dev_enabled(dev)))
- return NULL;
-
- return dev;
-}
-
-/*
- * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
- * @byte1: Byte 1 from pass-thru CDB.
- *
- * RETURNS:
- * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
- */
-static u8
-ata_scsi_map_proto(u8 byte1)
-{
- switch((byte1 & 0x1e) >> 1) {
- case 3: /* Non-data */
- return ATA_PROT_NODATA;
-
- case 6: /* DMA */
- return ATA_PROT_DMA;
-
- case 4: /* PIO Data-in */
- case 5: /* PIO Data-out */
- return ATA_PROT_PIO;
-
- case 10: /* Device Reset */
- case 0: /* Hard Reset */
- case 1: /* SRST */
- case 2: /* Bus Idle */
- case 7: /* Packet */
- case 8: /* DMA Queued */
- case 9: /* Device Diagnostic */
- case 11: /* UDMA Data-in */
- case 12: /* UDMA Data-Out */
- case 13: /* FPDMA */
- default: /* Reserved */
- break;
- }
-
- return ATA_PROT_UNKNOWN;
-}
-
-/**
- * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
- * @qc: command structure to be initialized
- * @scsicmd: SCSI command to convert
- *
- * Handles either 12 or 16-byte versions of the CDB.
- *
- * RETURNS:
- * Zero on success, non-zero on failure.
- */
-static unsigned int
-ata_scsi_pass_thru(struct ata_queued_cmd *qc, const u8 *scsicmd)
-{
- struct ata_taskfile *tf = &(qc->tf);
- struct scsi_cmnd *cmd = qc->scsicmd;
- struct ata_device *dev = qc->dev;
-
- if ((tf->protocol = ata_scsi_map_proto(scsicmd[1])) == ATA_PROT_UNKNOWN)
- goto invalid_fld;
-
- /* We may not issue DMA commands if no DMA mode is set */
- if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
- goto invalid_fld;
-
- if (scsicmd[1] & 0xe0)
- /* PIO multi not supported yet */
- goto invalid_fld;
-
- /*
- * 12 and 16 byte CDBs use different offsets to
- * provide the various register values.
- */
- if (scsicmd[0] == ATA_16) {
- /*
- * 16-byte CDB - may contain extended commands.
- *
- * If that is the case, copy the upper byte register values.
- */
- if (scsicmd[1] & 0x01) {
- tf->hob_feature = scsicmd[3];
- tf->hob_nsect = scsicmd[5];
- tf->hob_lbal = scsicmd[7];
- tf->hob_lbam = scsicmd[9];
- tf->hob_lbah = scsicmd[11];
- tf->flags |= ATA_TFLAG_LBA48;
- } else
- tf->flags &= ~ATA_TFLAG_LBA48;
-
- /*
- * Always copy low byte, device and command registers.
- */
- tf->feature = scsicmd[4];
- tf->nsect = scsicmd[6];
- tf->lbal = scsicmd[8];
- tf->lbam = scsicmd[10];
- tf->lbah = scsicmd[12];
- tf->device = scsicmd[13];
- tf->command = scsicmd[14];
- } else {
- /*
- * 12-byte CDB - incapable of extended commands.
- */
- tf->flags &= ~ATA_TFLAG_LBA48;
-
- tf->feature = scsicmd[3];
- tf->nsect = scsicmd[4];
- tf->lbal = scsicmd[5];
- tf->lbam = scsicmd[6];
- tf->lbah = scsicmd[7];
- tf->device = scsicmd[8];
- tf->command = scsicmd[9];
- }
- /*
- * If slave is possible, enforce correct master/slave bit
- */
- if (qc->ap->flags & ATA_FLAG_SLAVE_POSS)
- tf->device = qc->dev->devno ?
- tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
-
- /*
- * Filter SET_FEATURES - XFER MODE command -- otherwise,
- * SET_FEATURES - XFER MODE must be preceded/succeeded
- * by an update to hardware-specific registers for each
- * controller (i.e. the reason for ->set_piomode(),
- * ->set_dmamode(), and ->post_set_mode() hooks).
- */
- if ((tf->command == ATA_CMD_SET_FEATURES)
- && (tf->feature == SETFEATURES_XFER))
- goto invalid_fld;
-
- /*
- * Set flags so that all registers will be written,
- * and pass on write indication (used for PIO/DMA
- * setup.)
- */
- tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
-
- if (cmd->sc_data_direction == DMA_TO_DEVICE)
- tf->flags |= ATA_TFLAG_WRITE;
-
- /*
- * Set transfer length.
- *
- * TODO: find out if we need to do more here to
- * cover scatter/gather case.
- */
- qc->nsect = cmd->request_bufflen / ATA_SECT_SIZE;
-
- /* request result TF */
- qc->flags |= ATA_QCFLAG_RESULT_TF;
-
- return 0;
-
- invalid_fld:
- ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x00);
- /* "Invalid field in cdb" */
- return 1;
-}
-
-/**
- * ata_get_xlat_func - check if SCSI to ATA translation is possible
- * @dev: ATA device
- * @cmd: SCSI command opcode to consider
- *
- * Look up the SCSI command given, and determine whether the
- * SCSI command is to be translated or simulated.
- *
- * RETURNS:
- * Pointer to translation function if possible, %NULL if not.
- */
-
-static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
-{
- switch (cmd) {
- case READ_6:
- case READ_10:
- case READ_16:
-
- case WRITE_6:
- case WRITE_10:
- case WRITE_16:
- return ata_scsi_rw_xlat;
-
- case SYNCHRONIZE_CACHE:
- if (ata_try_flush_cache(dev))
- return ata_scsi_flush_xlat;
- break;
-
- case VERIFY:
- case VERIFY_16:
- return ata_scsi_verify_xlat;
-
- case ATA_12:
- case ATA_16:
- return ata_scsi_pass_thru;
-
- case START_STOP:
- return ata_scsi_start_stop_xlat;
- }
-
- return NULL;
-}
-
-/**
- * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
- * @ap: ATA port to which the command was being sent
- * @cmd: SCSI command to dump
- *
- * Prints the contents of a SCSI command via printk().
- */
-
-static inline void ata_scsi_dump_cdb(struct ata_port *ap,
- struct scsi_cmnd *cmd)
-{
-#ifdef ATA_DEBUG
- struct scsi_device *scsidev = cmd->device;
- u8 *scsicmd = cmd->cmnd;
-
- DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
- ap->id,
- scsidev->channel, scsidev->id, scsidev->lun,
- scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
- scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
- scsicmd[8]);
-#endif
-}
-
-static inline int __ata_scsi_queuecmd(struct scsi_cmnd *cmd,
- void (*done)(struct scsi_cmnd *),
- struct ata_device *dev)
-{
- int rc = 0;
-
- if (dev->class == ATA_DEV_ATA) {
- ata_xlat_func_t xlat_func = ata_get_xlat_func(dev,
- cmd->cmnd[0]);
-
- if (xlat_func)
- rc = ata_scsi_translate(dev, cmd, done, xlat_func);
- else
- ata_scsi_simulate(dev, cmd, done);
- } else
- rc = ata_scsi_translate(dev, cmd, done, atapi_xlat);
-
- return rc;
-}
-
-/**
- * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
- * @cmd: SCSI command to be sent
- * @done: Completion function, called when command is complete
- *
- * In some cases, this function translates SCSI commands into
- * ATA taskfiles, and queues the taskfiles to be sent to
- * hardware. In other cases, this function simulates a
- * SCSI device by evaluating and responding to certain
- * SCSI commands. This creates the overall effect of
- * ATA and ATAPI devices appearing as SCSI devices.
- *
- * LOCKING:
- * Releases scsi-layer-held lock, and obtains host_set lock.
- *
- * RETURNS:
- * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
- * 0 otherwise.
- */
-int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
-{
- struct ata_port *ap;
- struct ata_device *dev;
- struct scsi_device *scsidev = cmd->device;
- struct Scsi_Host *shost = scsidev->host;
- int rc = 0;
-
- ap = ata_shost_to_port(shost);
-
- spin_unlock(shost->host_lock);
- spin_lock(ap->lock);
-
- ata_scsi_dump_cdb(ap, cmd);
-
- dev = ata_scsi_find_dev(ap, scsidev);
- if (likely(dev))
- rc = __ata_scsi_queuecmd(cmd, done, dev);
- else {
- cmd->result = (DID_BAD_TARGET << 16);
- done(cmd);
- }
-
- spin_unlock(ap->lock);
- spin_lock(shost->host_lock);
- return rc;
-}
-
-/**
- * ata_scsi_simulate - simulate SCSI command on ATA device
- * @dev: the target device
- * @cmd: SCSI command being sent to device.
- * @done: SCSI command completion function.
- *
- * Interprets and directly executes a select list of SCSI commands
- * that can be handled internally.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- */
-
-void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
- void (*done)(struct scsi_cmnd *))
-{
- struct ata_scsi_args args;
- const u8 *scsicmd = cmd->cmnd;
-
- args.dev = dev;
- args.id = dev->id;
- args.cmd = cmd;
- args.done = done;
-
- switch(scsicmd[0]) {
- /* no-op's, complete with success */
- case SYNCHRONIZE_CACHE:
- case REZERO_UNIT:
- case SEEK_6:
- case SEEK_10:
- case TEST_UNIT_READY:
- case FORMAT_UNIT: /* FIXME: correct? */
- case SEND_DIAGNOSTIC: /* FIXME: correct? */
- ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
- break;
-
- case INQUIRY:
- if (scsicmd[1] & 2) /* is CmdDt set? */
- ata_scsi_invalid_field(cmd, done);
- else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
- ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
- else if (scsicmd[2] == 0x00)
- ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
- else if (scsicmd[2] == 0x80)
- ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
- else if (scsicmd[2] == 0x83)
- ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
- else
- ata_scsi_invalid_field(cmd, done);
- break;
-
- case MODE_SENSE:
- case MODE_SENSE_10:
- ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
- break;
-
- case MODE_SELECT: /* unconditionally return */
- case MODE_SELECT_10: /* bad-field-in-cdb */
- ata_scsi_invalid_field(cmd, done);
- break;
-
- case READ_CAPACITY:
- ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
- break;
-
- case SERVICE_ACTION_IN:
- if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
- ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
- else
- ata_scsi_invalid_field(cmd, done);
- break;
-
- case REPORT_LUNS:
- ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
- break;
-
- /* mandatory commands we haven't implemented yet */
- case REQUEST_SENSE:
-
- /* all other commands */
- default:
- ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
- /* "Invalid command operation code" */
- done(cmd);
- break;
- }
-}
-
-void ata_scsi_scan_host(struct ata_port *ap)
-{
- unsigned int i;
-
- if (ap->flags & ATA_FLAG_DISABLED)
- return;
-
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- struct ata_device *dev = &ap->device[i];
- struct scsi_device *sdev;
-
- if (!ata_dev_enabled(dev) || dev->sdev)
- continue;
-
- sdev = __scsi_add_device(ap->host, 0, i, 0, NULL);
- if (!IS_ERR(sdev)) {
- dev->sdev = sdev;
- scsi_device_put(sdev);
- }
- }
-}
-
-/**
- * ata_scsi_offline_dev - offline attached SCSI device
- * @dev: ATA device to offline attached SCSI device for
- *
- * This function is called from ata_eh_hotplug() and responsible
- * for taking the SCSI device attached to @dev offline. This
- * function is called with host_set lock which protects dev->sdev
- * against clearing.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- *
- * RETURNS:
- * 1 if attached SCSI device exists, 0 otherwise.
- */
-int ata_scsi_offline_dev(struct ata_device *dev)
-{
- if (dev->sdev) {
- scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
- return 1;
- }
- return 0;
-}
-
-/**
- * ata_scsi_remove_dev - remove attached SCSI device
- * @dev: ATA device to remove attached SCSI device for
- *
- * This function is called from ata_eh_scsi_hotplug() and
- * responsible for removing the SCSI device attached to @dev.
- *
- * LOCKING:
- * Kernel thread context (may sleep).
- */
-static void ata_scsi_remove_dev(struct ata_device *dev)
-{
- struct ata_port *ap = dev->ap;
- struct scsi_device *sdev;
- unsigned long flags;
-
- /* Alas, we need to grab scan_mutex to ensure SCSI device
- * state doesn't change underneath us and thus
- * scsi_device_get() always succeeds. The mutex locking can
- * be removed if there is __scsi_device_get() interface which
- * increments reference counts regardless of device state.
- */
- mutex_lock(&ap->host->scan_mutex);
- spin_lock_irqsave(ap->lock, flags);
-
- /* clearing dev->sdev is protected by host_set lock */
- sdev = dev->sdev;
- dev->sdev = NULL;
-
- if (sdev) {
- /* If user initiated unplug races with us, sdev can go
- * away underneath us after the host_set lock and
- * scan_mutex are released. Hold onto it.
- */
- if (scsi_device_get(sdev) == 0) {
- /* The following ensures the attached sdev is
- * offline on return from ata_scsi_offline_dev()
- * regardless it wins or loses the race
- * against this function.
- */
- scsi_device_set_state(sdev, SDEV_OFFLINE);
- } else {
- WARN_ON(1);
- sdev = NULL;
- }
- }
-
- spin_unlock_irqrestore(ap->lock, flags);
- mutex_unlock(&ap->host->scan_mutex);
-
- if (sdev) {
- ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
- sdev->sdev_gendev.bus_id);
-
- scsi_remove_device(sdev);
- scsi_device_put(sdev);
- }
-}
-
-/**
- * ata_scsi_hotplug - SCSI part of hotplug
- * @data: Pointer to ATA port to perform SCSI hotplug on
- *
- * Perform SCSI part of hotplug. It's executed from a separate
- * workqueue after EH completes. This is necessary because SCSI
- * hot plugging requires working EH and hot unplugging is
- * synchronized with hot plugging with a mutex.
- *
- * LOCKING:
- * Kernel thread context (may sleep).
- */
-void ata_scsi_hotplug(void *data)
-{
- struct ata_port *ap = data;
- int i;
-
- if (ap->pflags & ATA_PFLAG_UNLOADING) {
- DPRINTK("ENTER/EXIT - unloading\n");
- return;
- }
-
- DPRINTK("ENTER\n");
-
- /* unplug detached devices */
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- struct ata_device *dev = &ap->device[i];
- unsigned long flags;
-
- if (!(dev->flags & ATA_DFLAG_DETACHED))
- continue;
-
- spin_lock_irqsave(ap->lock, flags);
- dev->flags &= ~ATA_DFLAG_DETACHED;
- spin_unlock_irqrestore(ap->lock, flags);
-
- ata_scsi_remove_dev(dev);
- }
-
- /* scan for new ones */
- ata_scsi_scan_host(ap);
-
- /* If we scanned while EH was in progress, scan would have
- * failed silently. Requeue if there are enabled but
- * unattached devices.
- */
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- struct ata_device *dev = &ap->device[i];
- if (ata_dev_enabled(dev) && !dev->sdev) {
- queue_delayed_work(ata_aux_wq, &ap->hotplug_task, HZ);
- break;
- }
- }
-
- DPRINTK("EXIT\n");
-}
-
-/**
- * ata_scsi_user_scan - indication for user-initiated bus scan
- * @shost: SCSI host to scan
- * @channel: Channel to scan
- * @id: ID to scan
- * @lun: LUN to scan
- *
- * This function is called when user explicitly requests bus
- * scan. Set probe pending flag and invoke EH.
- *
- * LOCKING:
- * SCSI layer (we don't care)
- *
- * RETURNS:
- * Zero.
- */
-static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
- unsigned int id, unsigned int lun)
-{
- struct ata_port *ap = ata_shost_to_port(shost);
- unsigned long flags;
- int rc = 0;
-
- if (!ap->ops->error_handler)
- return -EOPNOTSUPP;
-
- if ((channel != SCAN_WILD_CARD && channel != 0) ||
- (lun != SCAN_WILD_CARD && lun != 0))
- return -EINVAL;
-
- spin_lock_irqsave(ap->lock, flags);
-
- if (id == SCAN_WILD_CARD) {
- ap->eh_info.probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
- ap->eh_info.action |= ATA_EH_SOFTRESET;
- } else {
- struct ata_device *dev = ata_find_dev(ap, id);
-
- if (dev) {
- ap->eh_info.probe_mask |= 1 << dev->devno;
- ap->eh_info.action |= ATA_EH_SOFTRESET;
- ap->eh_info.flags |= ATA_EHI_RESUME_LINK;
- } else
- rc = -EINVAL;
- }
-
- if (rc == 0)
- ata_port_schedule_eh(ap);
-
- spin_unlock_irqrestore(ap->lock, flags);
-
- return rc;
-}
-
-/**
- * ata_scsi_dev_rescan - initiate scsi_rescan_device()
- * @data: Pointer to ATA port to perform scsi_rescan_device()
- *
- * After ATA pass thru (SAT) commands are executed successfully,
- * libata need to propagate the changes to SCSI layer. This
- * function must be executed from ata_aux_wq such that sdev
- * attach/detach don't race with rescan.
- *
- * LOCKING:
- * Kernel thread context (may sleep).
- */
-void ata_scsi_dev_rescan(void *data)
-{
- struct ata_port *ap = data;
- struct ata_device *dev;
- unsigned int i;
-
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- dev = &ap->device[i];
-
- if (ata_dev_enabled(dev) && dev->sdev)
- scsi_rescan_device(&(dev->sdev->sdev_gendev));
- }
-}
-
-/**
- * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
- * @pdev: PCI device that the scsi device is attached to
- * @port_info: Information from low-level host driver
- * @host: SCSI host that the scsi device is attached to
- *
- * LOCKING:
- * PCI/etc. bus probe sem.
- *
- * RETURNS:
- * ata_port pointer on success / NULL on failure.
- */
-
-struct ata_port *ata_sas_port_alloc(struct ata_host_set *host_set,
- struct ata_port_info *port_info,
- struct Scsi_Host *host)
-{
- struct ata_port *ap = kzalloc(sizeof(*ap), GFP_KERNEL);
- struct ata_probe_ent *ent;
-
- if (!ap)
- return NULL;
-
- ent = ata_probe_ent_alloc(host_set->dev, port_info);
- if (!ent) {
- kfree(ap);
- return NULL;
- }
-
- ata_port_init(ap, host_set, ent, 0);
- ap->lock = host->host_lock;
- kfree(ent);
- return ap;
-}
-EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
-
-/**
- * ata_sas_port_start - Set port up for dma.
- * @ap: Port to initialize
- *
- * Called just after data structures for each port are
- * initialized. Allocates DMA pad.
- *
- * May be used as the port_start() entry in ata_port_operations.
- *
- * LOCKING:
- * Inherited from caller.
- */
-int ata_sas_port_start(struct ata_port *ap)
-{
- return ata_pad_alloc(ap, ap->dev);
-}
-EXPORT_SYMBOL_GPL(ata_sas_port_start);
-
-/**
- * ata_port_stop - Undo ata_sas_port_start()
- * @ap: Port to shut down
- *
- * Frees the DMA pad.
- *
- * May be used as the port_stop() entry in ata_port_operations.
- *
- * LOCKING:
- * Inherited from caller.
- */
-
-void ata_sas_port_stop(struct ata_port *ap)
-{
- ata_pad_free(ap, ap->dev);
-}
-EXPORT_SYMBOL_GPL(ata_sas_port_stop);
-
-/**
- * ata_sas_port_init - Initialize a SATA device
- * @ap: SATA port to initialize
- *
- * LOCKING:
- * PCI/etc. bus probe sem.
- *
- * RETURNS:
- * Zero on success, non-zero on error.
- */
-
-int ata_sas_port_init(struct ata_port *ap)
-{
- int rc = ap->ops->port_start(ap);
-
- if (!rc)
- rc = ata_bus_probe(ap);
-
- return rc;
-}
-EXPORT_SYMBOL_GPL(ata_sas_port_init);
-
-/**
- * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
- * @ap: SATA port to destroy
- *
- */
-
-void ata_sas_port_destroy(struct ata_port *ap)
-{
- ap->ops->port_stop(ap);
- kfree(ap);
-}
-EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
-
-/**
- * ata_sas_slave_configure - Default slave_config routine for libata devices
- * @sdev: SCSI device to configure
- * @ap: ATA port to which SCSI device is attached
- *
- * RETURNS:
- * Zero.
- */
-
-int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
-{
- ata_scsi_sdev_config(sdev);
- ata_scsi_dev_config(sdev, ap->device);
- return 0;
-}
-EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
-
-/**
- * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
- * @cmd: SCSI command to be sent
- * @done: Completion function, called when command is complete
- * @ap: ATA port to which the command is being sent
- *
- * RETURNS:
- * Zero.
- */
-
-int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
- struct ata_port *ap)
-{
- ata_scsi_dump_cdb(ap, cmd);
-
- if (likely(ata_scsi_dev_enabled(ap->device)))
- __ata_scsi_queuecmd(cmd, done, ap->device);
- else {
- cmd->result = (DID_BAD_TARGET << 16);
- done(cmd);
- }
- return 0;
-}
-EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
git.openpandora.org / pandora-kernel.git / blobdiff