| /* |
| * 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_eh.h> |
| #include <scsi/scsi_device.h> |
| #include <scsi/scsi_request.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); |
| |
| |
| #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, |
| }; |
| |
| |
| 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: |
| if (argbuf) |
| 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"); |
| } |
| } |
| } |
| |
| 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); |
| |
| return ata_device_resume(dev); |
| } |
| |
| int ata_scsi_device_suspend(struct scsi_device *sdev, pm_message_t state) |
| { |
| struct ata_port *ap = ata_shost_to_port(sdev->host); |
| struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); |
| |
| return ata_device_suspend(dev, state); |
| } |
| |
| /** |
| * 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_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); |
| |
| /* 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); |
| } |
| |
| 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->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_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_dev_enabled(dev))) |
| return NULL; |
| |
| if (!atapi_enabled || (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 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->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->host_set->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->host_set->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) |
| { |
| struct ata_device *dev; |
| unsigned int i; |
| |
| if (ap->flags & ATA_FLAG_DISABLED) |
| return; |
| |
| for (i = 0; i < ATA_MAX_DEVICES; i++) { |
| dev = &ap->device[i]; |
| |
| if (ata_dev_enabled(dev)) |
| scsi_scan_target(&ap->host->shost_gendev, 0, i, 0, 0); |
| } |
| } |