diff options
Diffstat (limited to 'drivers/scsi/libata-scsi.c')
| -rw-r--r-- | drivers/scsi/libata-scsi.c | 2555 |
1 files changed, 0 insertions, 2555 deletions
diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c deleted file mode 100644 index eb604b0a899..00000000000 --- a/drivers/scsi/libata-scsi.c +++ /dev/null @@ -1,2555 +0,0 @@ -/* - * 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.h" -#include <scsi/scsi_host.h> -#include <scsi/scsi_device.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); - -#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 */ -}; - - -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 - * @dev: Device to whom 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_request *sreq; - - if (NULL == (void *)arg) - return -EINVAL; - - if (copy_from_user(args, arg, sizeof(args))) - return -EFAULT; - - sreq = scsi_allocate_request(scsidev, GFP_KERNEL); - if (!sreq) - return -EINTR; - - 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 */ - sreq->sr_data_direction = DMA_FROM_DEVICE; - } else { - scsi_cmd[1] = (3 << 1); /* Non-data */ - /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */ - sreq->sr_data_direction = 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... */ - scsi_wait_req(sreq, scsi_cmd, argbuf, argsize, (10*HZ), 5); - - if (sreq->sr_result) { - rc = -EIO; - goto error; - } - - /* Need code to retrieve data from check condition? */ - - if ((argbuf) - && copy_to_user((void *)(arg + sizeof(args)), argbuf, argsize)) - rc = -EFAULT; -error: - scsi_release_request(sreq); - - if (argbuf) - kfree(argbuf); - - return rc; -} - -/** - * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl - * @dev: Device to whom 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_request *sreq; - - if (NULL == (void *)arg) - 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]; - - sreq = scsi_allocate_request(scsidev, GFP_KERNEL); - if (!sreq) { - rc = -EINTR; - goto error; - } - - sreq->sr_data_direction = DMA_NONE; - /* Good values for timeout and retries? Values below - from scsi_ioctl_send_command() for default case... */ - scsi_wait_req(sreq, scsi_cmd, NULL, 0, (10*HZ), 5); - - if (sreq->sr_result) { - rc = -EIO; - goto error; - } - - /* Need code to retrieve data from check condition? */ - -error: - scsi_release_request(sreq); - return rc; -} - -int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg) -{ - struct ata_port *ap; - struct ata_device *dev; - int val = -EINVAL, rc = -EINVAL; - - ap = (struct ata_port *) &scsidev->host->hostdata[0]; - if (!ap) - goto out; - - dev = ata_scsi_find_dev(ap, scsidev); - if (!dev) { - rc = -ENODEV; - goto out; - } - - 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; - } - -out: - return rc; -} - -/** - * ata_scsi_qc_new - acquire new ata_queued_cmd reference - * @ap: ATA port to which the new command is attached - * @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_port *ap, - struct ata_device *dev, - struct scsi_cmnd *cmd, - void (*done)(struct scsi_cmnd *)) -{ - struct ata_queued_cmd *qc; - - qc = ata_qc_new_init(ap, 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_to_sense_error - convert ATA error to SCSI error - * @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 - * - * 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 i; - - /* Based on the 3ware driver translation table */ - static 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 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 */ - 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? */ - printk(KERN_WARNING "ata%u: no sense translation for status: 0x%02x\n", - id, drv_stat); - - /* For our last chance pick, use medium read error because - * it's much more common than an ATA drive telling you a write - * has failed. - */ - *sk = MEDIUM_ERROR; - *asc = 0x11; /* "unrecovered read error" */ - *ascq = 0x04; /* "auto-reallocation failed" */ - - translate_done: - 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->tf; - unsigned char *sb = cmd->sense_buffer; - unsigned char *desc = sb + 8; - - memset(sb, 0, SCSI_SENSE_BUFFERSIZE); - - cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; - - /* - * Read the controller registers. - */ - assert(NULL != qc->ap->ops->tf_read); - qc->ap->ops->tf_read(qc->ap, tf); - - /* - * Use ata_to_sense_error() to map status register bits - * onto sense key, asc & ascq. - */ - if (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]); - 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->tf; - unsigned char *sb = cmd->sense_buffer; - - memset(sb, 0, SCSI_SENSE_BUFFERSIZE); - - cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; - - /* - * Read the controller registers. - */ - assert(NULL != qc->ap->ops->tf_read); - qc->ap->ops->tf_read(qc->ap, tf); - - /* - * Use ata_to_sense_error() to map status register bits - * onto sense key, asc & ascq. - */ - if (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]); - 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 */ - } -} - -/** - * 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) -{ - sdev->use_10_for_rw = 1; - sdev->use_10_for_ms = 1; - - blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD); - - if (sdev->id < ATA_MAX_DEVICES) { - struct ata_port *ap; - struct ata_device *dev; - - ap = (struct ata_port *) &sdev->host->hostdata[0]; - dev = &ap->device[sdev->id]; - - /* TODO: 1024 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. - */ - if ((dev->flags & ATA_DFLAG_LBA48) && - ((dev->flags & ATA_DFLAG_LOCK_SECTORS) == 0)) { - /* - * do not overwrite sdev->host->max_sectors, since - * other drives on this host may not support LBA48 - */ - blk_queue_max_sectors(sdev->request_queue, 2048); - } - - /* - * 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); - } - } - - return 0; /* scsi layer doesn't check return value, sigh */ -} - -/** - * ata_scsi_error - SCSI layer error handler callback - * @host: SCSI host on which error occurred - * - * Handles SCSI-layer-thrown error events. - * - * LOCKING: - * Inherited from SCSI layer (none, can sleep) - * - * RETURNS: - * Zero. - */ - -int ata_scsi_error(struct Scsi_Host *host) -{ - struct ata_port *ap; - - DPRINTK("ENTER\n"); - - ap = (struct ata_port *) &host->hostdata[0]; - ap->ops->eng_timeout(ap); - - /* TODO: this is per-command; when queueing is supported - * this code will either change or move to a more - * appropriate place - */ - host->host_failed--; - INIT_LIST_HEAD(&host->eh_cmd_q); - - DPRINTK("EXIT\n"); - return 0; -} - -/** - * 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) { - qc->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 (dev->flags & ATA_DFLAG_LBA48) { - if (n_block > (64 * 1024)) - goto invalid_fld; - - /* 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 { - if (n_block > 256) - goto invalid_fld; - - /* use LBA28 */ - tf->command = ATA_CMD_VERIFY; - - tf->device |= (block >> 24) & 0xf; - } - - 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 (n_block > 256) - 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; - - 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; - - 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 and transfer length. */ - switch (scsicmd[0]) { - case READ_10: - case WRITE_10: - scsi_10_lba_len(scsicmd, &block, &n_block); - 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); - 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. - */ - goto nothing_to_do; - - if (dev->flags & ATA_DFLAG_LBA) { - tf->flags |= ATA_TFLAG_LBA; - - if (dev->flags & ATA_DFLAG_LBA48) { - /* The request -may- be too large for LBA48. */ - if ((block >> 48) || (n_block > 65536)) - 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 { - /* use LBA28 */ - - /* The request -may- be too large for LBA28. */ - if ((block >> 28) || (n_block > 256)) - goto out_of_range; - - tf->device |= (block >> 24) & 0xf; - } - - ata_rwcmd_protocol(qc); - - 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 ((block >> 28) || (n_block > 256)) - goto out_of_range; - - ata_rwcmd_protocol(qc); - - /* 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 int ata_scsi_qc_complete(struct ata_queued_cmd *qc, - unsigned int err_mask) -{ - struct scsi_cmnd *cmd = qc->scsicmd; - u8 *cdb = cmd->cmnd; - int need_sense = (err_mask != 0); - - /* 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) { - /* The ata_gen_..._sense routines fill in tf */ - ata_dump_status(qc->ap->id, &qc->tf); - } - - qc->scsidone(cmd); - - return 0; -} - -/** - * ata_scsi_translate - Translate then issue SCSI command to ATA device - * @ap: ATA port to which the command is addressed - * @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) - */ - -static void ata_scsi_translate(struct ata_port *ap, 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; - - VPRINTK("ENTER\n"); - - qc = ata_scsi_qc_new(ap, 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)) { - printk(KERN_WARNING "ata%u(%u): WARNING: zero len r/w req\n", - ap->id, dev->devno); - 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 */ - if (ata_qc_issue(qc)) - goto err_did; - - VPRINTK("EXIT\n"); - return; - -early_finish: - ata_qc_free(qc); - done(cmd); - DPRINTK("EXIT - early finish (good or error)\n"); - return; - -err_did: - ata_qc_free(qc); -err_mem: - cmd->result = (DID_ERROR << 16); - done(cmd); - DPRINTK("EXIT - internal\n"); - return; -} - -/** - * 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-EVPD 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_dev_id_string(args->id, &rbuf[16], ATA_ID_PROD_OFS, 16); - ata_dev_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 EVPD 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 EVPD 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 EVPD pages */ - - if (buflen > 6) - memcpy(rbuf + 4, pages, sizeof(pages)); - - return 0; -} - -/** - * ata_scsiop_inq_80 - Simulate INQUIRY EVPD 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_dev_id_string(args->id, (unsigned char *) &rbuf[4], - ATA_ID_SERNO_OFS, ATA_SERNO_LEN); - - return 0; -} - -static const char *inq_83_str = "Linux ATA-SCSI simulator"; - -/** - * ata_scsiop_inq_83 - Simulate INQUIRY EVPD 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. - * - * Returns device identification. Currently hardcoded to - * return "Linux ATA-SCSI simulator". - * - * LOCKING: - * spin_lock_irqsave(host_set lock) - */ - -unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf, - unsigned int buflen) -{ - rbuf[1] = 0x83; /* this page code */ - rbuf[3] = 4 + strlen(inq_83_str); /* page len */ - - /* our one and only identification descriptor (vendor-specific) */ - if (buflen > (strlen(inq_83_str) + 4 + 4 - 1)) { - rbuf[4 + 0] = 2; /* code set: ASCII */ - rbuf[4 + 3] = strlen(inq_83_str); - memcpy(rbuf + 4 + 4, inq_83_str, strlen(inq_83_str)); - } - - 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); -} - -/** - * 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) -{ - 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; - - 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; - if (six_byte) { - output_len--; - rbuf[0] = output_len; - 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 (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); -} - -void atapi_request_sense(struct ata_port *ap, struct ata_device *dev, - struct scsi_cmnd *cmd) -{ - DECLARE_COMPLETION(wait); - struct ata_queued_cmd *qc; - unsigned long flags; - int rc; - - DPRINTK("ATAPI request sense\n"); - - qc = ata_qc_new_init(ap, dev); - BUG_ON(qc == NULL); - - /* FIXME: is this needed? */ - memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer)); - - ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer)); - qc->dma_dir = DMA_FROM_DEVICE; - - memset(&qc->cdb, 0, ap->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; - - qc->tf.protocol = ATA_PROT_ATAPI; - qc->tf.lbam = (8 * 1024) & 0xff; - qc->tf.lbah = (8 * 1024) >> 8; - qc->nbytes = SCSI_SENSE_BUFFERSIZE; - - qc->waiting = &wait; - qc->complete_fn = ata_qc_complete_noop; - - spin_lock_irqsave(&ap->host_set->lock, flags); - rc = ata_qc_issue(qc); - spin_unlock_irqrestore(&ap->host_set->lock, flags); - - if (rc) - ata_port_disable(ap); - else - wait_for_completion(&wait); - - DPRINTK("EXIT\n"); -} - -static int atapi_qc_complete(struct ata_queued_cmd *qc, unsigned int err_mask) -{ - struct scsi_cmnd *cmd = qc->scsicmd; - - VPRINTK("ENTER, err_mask 0x%X\n", err_mask); - - if (unlikely(err_mask & AC_ERR_DEV)) { - DPRINTK("request check condition\n"); - - /* FIXME: command completion with check condition - * but no sense causes the error handler to run, - * which then issues REQUEST SENSE, fills in the sense - * buffer, and completes the command (for the second - * time). We need to issue REQUEST SENSE some other - * way, to avoid completing the command twice. - */ - cmd->result = SAM_STAT_CHECK_CONDITION; - - qc->scsidone(cmd); - - return 1; - } - - 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) { - 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. - */ - /* FIXME: do we ever override EVPD pages and the like, with - * this code? - */ - if (buf[2] == 0) { - buf[2] = 0x5; - buf[3] = 0x32; - } - - ata_scsi_rbuf_put(cmd, buf); - } - - cmd->result = SAM_STAT_GOOD; - } - - qc->scsidone(cmd); - return 0; -} -/** - * 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, qc->ap->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; - -#ifdef ATAPI_ENABLE_DMADIR - /* some SATA bridges need us to indicate data xfer direction */ - if (cmd->sc_data_direction != DMA_TO_DEVICE) - qc->tf.feature |= ATAPI_DMADIR; -#endif - } - - qc->nbytes = cmd->bufflen; - - return 0; -} - -/** - * 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; - - /* skip commands not addressed to targets we simulate */ - if (likely(scsidev->id < ATA_MAX_DEVICES)) - dev = &ap->device[scsidev->id]; - else - return NULL; - - if (unlikely((scsidev->channel != 0) || - (scsidev->lun != 0))) - return NULL; - - if (unlikely(!ata_dev_present(dev))) - return NULL; - - if (!atapi_enabled) { - if (unlikely(dev->class == ATA_DEV_ATAPI)) - 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 */ - if (byte1 & 0xe0) { - return ATA_PROT_PIO_MULT; - } - 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 - * @cmd: 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; - - if ((tf->protocol = ata_scsi_map_proto(scsicmd[1])) == ATA_PROT_UNKNOWN) - return 1; - - /* - * 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]; - } - - /* - * 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)) - return 1; - - /* - * 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->bufflen / ATA_SECT_SIZE; - - return 0; -} - -/** - * 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 -} - -/** - * 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: - * Zero. - */ - -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; - - ap = (struct ata_port *) &shost->hostdata[0]; - - spin_unlock(shost->host_lock); - spin_lock(&ap->host_set->lock); - - ata_scsi_dump_cdb(ap, cmd); - - dev = ata_scsi_find_dev(ap, scsidev); - if (unlikely(!dev)) { - cmd->result = (DID_BAD_TARGET << 16); - done(cmd); - goto out_unlock; - } - - if (dev->class == ATA_DEV_ATA) { - ata_xlat_func_t xlat_func = ata_get_xlat_func(dev, - cmd->cmnd[0]); - - if (xlat_func) - ata_scsi_translate(ap, dev, cmd, done, xlat_func); - else - ata_scsi_simulate(dev->id, cmd, done); - } else - ata_scsi_translate(ap, dev, cmd, done, atapi_xlat); - -out_unlock: - spin_unlock(&ap->host_set->lock); - spin_lock(shost->host_lock); - return 0; -} - -/** - * ata_scsi_simulate - simulate SCSI command on ATA device - * @id: current IDENTIFY data for 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(u16 *id, - struct scsi_cmnd *cmd, - void (*done)(struct scsi_cmnd *)) -{ - struct ata_scsi_args args; - const u8 *scsicmd = cmd->cmnd; - - args.id = 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) -{ - struct ata_device *dev; - unsigned int i; - - if (ap->flags & ATA_FLAG_PORT_DISABLED) - return; - - for (i = 0; i < ATA_MAX_DEVICES; i++) { - dev = &ap->device[i]; - - if (ata_dev_present(dev)) - scsi_scan_target(&ap->host->shost_gendev, 0, i, 0, 0); - } -} - |