diff options
Diffstat (limited to 'drivers/scsi/libata-scsi.c')
| -rw-r--r-- | drivers/scsi/libata-scsi.c | 1593 |
1 files changed, 1593 insertions, 0 deletions
diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c new file mode 100644 index 000000000000..4e5e54a1564b --- /dev/null +++ b/drivers/scsi/libata-scsi.c @@ -0,0 +1,1593 @@ +/* + libata-scsi.c - helper library for ATA + + Copyright 2003-2004 Red Hat, Inc. All rights reserved. + Copyright 2003-2004 Jeff Garzik + + The contents of this file are subject to the Open + Software License version 1.1 that can be found at + http://www.opensource.org/licenses/osl-1.1.txt and is included herein + by reference. + + Alternatively, the contents of this file may be used under the terms + of the GNU General Public License version 2 (the "GPL") as distributed + in the kernel source COPYING file, in which case the provisions of + the GPL are applicable instead of the above. If you wish to allow + the use of your version of this file only under the terms of the + GPL and not to allow others to use your version of this file under + the OSL, indicate your decision by deleting the provisions above and + replace them with the notice and other provisions required by the GPL. + If you do not delete the provisions above, a recipient may use your + version of this file under either the OSL or the GPL. + + */ + +#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 <linux/libata.h> +#include <asm/uaccess.h> + +#include "libata.h" + +typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc, u8 *scsicmd); +static struct ata_device * +ata_scsi_find_dev(struct ata_port *ap, struct scsi_device *scsidev); + + +/** + * 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; +} + +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; + + 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_to_sense_error - convert ATA error to SCSI error + * @qc: Command that we are erroring out + * @drv_stat: value contained in ATA status register + * + * Converts an ATA error into a SCSI error. While we are at it + * we decode and dump the ATA error for the user so that they + * have some idea what really happened at the non make-believe + * layer. + * + * LOCKING: + * spin_lock_irqsave(host_set lock) + */ + +void ata_to_sense_error(struct ata_queued_cmd *qc, u8 drv_stat) +{ + struct scsi_cmnd *cmd = qc->scsicmd; + u8 err = 0; + unsigned char *sb = cmd->sense_buffer; + /* 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 + }; + int i = 0; + + cmd->result = SAM_STAT_CHECK_CONDITION; + + /* + * Is this an error we can process/parse + */ + + if(drv_stat & ATA_ERR) + /* Read the err bits */ + err = ata_chk_err(qc->ap); + + /* Display the ATA level error info */ + + printk(KERN_WARNING "ata%u: status=0x%02x { ", qc->ap->id, drv_stat); + if(drv_stat & 0x80) + { + printk("Busy "); + err = 0; /* Data is not valid in this case */ + } + else { + if(drv_stat & 0x40) printk("DriveReady "); + if(drv_stat & 0x20) printk("DeviceFault "); + if(drv_stat & 0x10) printk("SeekComplete "); + if(drv_stat & 0x08) printk("DataRequest "); + if(drv_stat & 0x04) printk("CorrectedError "); + if(drv_stat & 0x02) printk("Index "); + if(drv_stat & 0x01) printk("Error "); + } + printk("}\n"); + + if(err) + { + printk(KERN_WARNING "ata%u: error=0x%02x { ", qc->ap->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"); + + /* Should we dump sector info here too ?? */ + } + + + /* Look for err */ + while(sense_table[i][0] != 0xFF) + { + /* Look for best matches first */ + if((sense_table[i][0] & err) == sense_table[i][0]) + { + sb[0] = 0x70; + sb[2] = sense_table[i][1]; + sb[7] = 0x0a; + sb[12] = sense_table[i][2]; + sb[13] = sense_table[i][3]; + return; + } + i++; + } + /* No immediate match */ + if(err) + printk(KERN_DEBUG "ata%u: no sense translation for 0x%02x\n", qc->ap->id, err); + + i = 0; + /* Fall back to interpreting status bits */ + while(stat_table[i][0] != 0xFF) + { + if(stat_table[i][0] & drv_stat) + { + sb[0] = 0x70; + sb[2] = stat_table[i][1]; + sb[7] = 0x0a; + sb[12] = stat_table[i][2]; + sb[13] = stat_table[i][3]; + return; + } + i++; + } + /* No error ?? */ + printk(KERN_ERR "ata%u: called with no error (%02X)!\n", qc->ap->id, drv_stat); + /* additional-sense-code[-qualifier] */ + + sb[0] = 0x70; + sb[2] = MEDIUM_ERROR; + sb[7] = 0x0A; + if (cmd->sc_data_direction == SCSI_DATA_READ) { + sb[12] = 0x11; /* "unrecovered read error" */ + sb[13] = 0x04; + } else { + sb[12] = 0x0C; /* "write error - */ + sb[13] = 0x02; /* auto-reallocation failed" */ + } +} + +/** + * 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)) { + sdev->host->max_sectors = 2048; + blk_queue_max_sectors(sdev->request_queue, 2048); + } + } + + 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--; + + DPRINTK("EXIT\n"); + return 0; +} + +/** + * 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, u8 *scsicmd) +{ + struct ata_taskfile *tf = &qc->tf; + + tf->flags |= ATA_TFLAG_DEVICE; + tf->protocol = ATA_PROT_NODATA; + + if ((tf->flags & ATA_TFLAG_LBA48) && + (ata_id_has_flush_ext(qc->dev->id))) + tf->command = ATA_CMD_FLUSH_EXT; + else + tf->command = ATA_CMD_FLUSH; + + return 0; +} + +/** + * 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, u8 *scsicmd) +{ + struct ata_taskfile *tf = &qc->tf; + unsigned int lba48 = tf->flags & ATA_TFLAG_LBA48; + u64 dev_sectors = qc->dev->n_sectors; + u64 sect = 0; + u32 n_sect = 0; + + tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; + tf->protocol = ATA_PROT_NODATA; + tf->device |= ATA_LBA; + + if (scsicmd[0] == VERIFY) { + sect |= ((u64)scsicmd[2]) << 24; + sect |= ((u64)scsicmd[3]) << 16; + sect |= ((u64)scsicmd[4]) << 8; + sect |= ((u64)scsicmd[5]); + + n_sect |= ((u32)scsicmd[7]) << 8; + n_sect |= ((u32)scsicmd[8]); + } + + else if (scsicmd[0] == VERIFY_16) { + sect |= ((u64)scsicmd[2]) << 56; + sect |= ((u64)scsicmd[3]) << 48; + sect |= ((u64)scsicmd[4]) << 40; + sect |= ((u64)scsicmd[5]) << 32; + sect |= ((u64)scsicmd[6]) << 24; + sect |= ((u64)scsicmd[7]) << 16; + sect |= ((u64)scsicmd[8]) << 8; + sect |= ((u64)scsicmd[9]); + + n_sect |= ((u32)scsicmd[10]) << 24; + n_sect |= ((u32)scsicmd[11]) << 16; + n_sect |= ((u32)scsicmd[12]) << 8; + n_sect |= ((u32)scsicmd[13]); + } + + else + return 1; + + if (!n_sect) + return 1; + if (sect >= dev_sectors) + return 1; + if ((sect + n_sect) > dev_sectors) + return 1; + if (lba48) { + if (n_sect > (64 * 1024)) + return 1; + } else { + if (n_sect > 256) + return 1; + } + + if (lba48) { + tf->command = ATA_CMD_VERIFY_EXT; + + tf->hob_nsect = (n_sect >> 8) & 0xff; + + tf->hob_lbah = (sect >> 40) & 0xff; + tf->hob_lbam = (sect >> 32) & 0xff; + tf->hob_lbal = (sect >> 24) & 0xff; + } else { + tf->command = ATA_CMD_VERIFY; + + tf->device |= (sect >> 24) & 0xf; + } + + tf->nsect = n_sect & 0xff; + + tf->lbah = (sect >> 16) & 0xff; + tf->lbam = (sect >> 8) & 0xff; + tf->lbal = sect & 0xff; + + return 0; +} + +/** + * 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, u8 *scsicmd) +{ + struct ata_taskfile *tf = &qc->tf; + unsigned int lba48 = tf->flags & ATA_TFLAG_LBA48; + + tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; + tf->protocol = qc->dev->xfer_protocol; + tf->device |= ATA_LBA; + + if (scsicmd[0] == READ_10 || scsicmd[0] == READ_6 || + scsicmd[0] == READ_16) { + tf->command = qc->dev->read_cmd; + } else { + tf->command = qc->dev->write_cmd; + tf->flags |= ATA_TFLAG_WRITE; + } + + if (scsicmd[0] == READ_10 || scsicmd[0] == WRITE_10) { + if (lba48) { + tf->hob_nsect = scsicmd[7]; + tf->hob_lbal = scsicmd[2]; + + qc->nsect = ((unsigned int)scsicmd[7] << 8) | + scsicmd[8]; + } else { + /* if we don't support LBA48 addressing, the request + * -may- be too large. */ + if ((scsicmd[2] & 0xf0) || scsicmd[7]) + return 1; + + /* stores LBA27:24 in lower 4 bits of device reg */ + tf->device |= scsicmd[2]; + + qc->nsect = scsicmd[8]; + } + + tf->nsect = scsicmd[8]; + tf->lbal = scsicmd[5]; + tf->lbam = scsicmd[4]; + tf->lbah = scsicmd[3]; + + VPRINTK("ten-byte command\n"); + return 0; + } + + if (scsicmd[0] == READ_6 || scsicmd[0] == WRITE_6) { + qc->nsect = tf->nsect = scsicmd[4]; + tf->lbal = scsicmd[3]; + tf->lbam = scsicmd[2]; + tf->lbah = scsicmd[1] & 0x1f; /* mask out reserved bits */ + + VPRINTK("six-byte command\n"); + return 0; + } + + if (scsicmd[0] == READ_16 || scsicmd[0] == WRITE_16) { + /* rule out impossible LBAs and sector counts */ + if (scsicmd[2] || scsicmd[3] || scsicmd[10] || scsicmd[11]) + return 1; + + if (lba48) { + tf->hob_nsect = scsicmd[12]; + tf->hob_lbal = scsicmd[6]; + tf->hob_lbam = scsicmd[5]; + tf->hob_lbah = scsicmd[4]; + + qc->nsect = ((unsigned int)scsicmd[12] << 8) | + scsicmd[13]; + } else { + /* once again, filter out impossible non-zero values */ + if (scsicmd[4] || scsicmd[5] || scsicmd[12] || + (scsicmd[6] & 0xf0)) + return 1; + + /* stores LBA27:24 in lower 4 bits of device reg */ + tf->device |= scsicmd[6]; + + qc->nsect = scsicmd[13]; + } + + tf->nsect = scsicmd[13]; + tf->lbal = scsicmd[9]; + tf->lbam = scsicmd[8]; + tf->lbah = scsicmd[7]; + + VPRINTK("sixteen-byte command\n"); + return 0; + } + + DPRINTK("no-byte command\n"); + return 1; +} + +static int ata_scsi_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat) +{ + struct scsi_cmnd *cmd = qc->scsicmd; + + if (unlikely(drv_stat & (ATA_ERR | ATA_BUSY | ATA_DRQ))) + ata_to_sense_error(qc, drv_stat); + else + cmd->result = SAM_STAT_GOOD; + + 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. + * + * 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) + return; + + /* data is present; dma-map it */ + if (cmd->sc_data_direction == SCSI_DATA_READ || + cmd->sc_data_direction == SCSI_DATA_WRITE) { + 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_out; + } + + 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 err_out; + + /* select device, send command to hardware */ + if (ata_qc_issue(qc)) + goto err_out; + + VPRINTK("EXIT\n"); + return; + +err_out: + ata_qc_free(qc); + ata_bad_cdb(cmd, done); + DPRINTK("EXIT - badcmd\n"); +} + +/** + * 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, or not. + * + * 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) + ata_bad_cdb(cmd, args->done); + else { + 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 - + * @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[] = { + 0x8, /* page code */ + 0x12, /* page length */ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 10 zeroes */ + 0, 0, 0, 0, 0, 0, 0, 0 /* 8 zeroes */ + }; + + 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) +{ + const u8 page[] = {0xa, 0xa, 6, 0, 0, 0, 0, 0, 0xff, 0xff, 0, 30}; + + /* byte 2: set the descriptor format sense data bit (bit 2) + * since we need to support returning this format for SAT + * commands and any SCSI commands against a 48b LBA device. + */ + + ata_msense_push(ptr_io, last, page, sizeof(page)); + return sizeof(page); +} + +/** + * 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) +{ + const u8 page[] = { + 0x1, /* page code */ + 0xa, /* page length */ + (1 << 7) | (1 << 6), /* note auto r/w reallocation */ + 0, 0, 0, 0, 0, 0, 0, 0, 0 /* 9 zeroes */ + }; + + ata_msense_push(ptr_io, last, page, sizeof(page)); + return sizeof(page); +} + +/** + * 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. + * + * 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; + unsigned int page_control, six_byte, output_len; + + VPRINTK("ENTER\n"); + + six_byte = (scsicmd[0] == MODE_SENSE); + + /* we only support saved and current values (which we treat + * in the same manner) + */ + page_control = scsicmd[2] >> 6; + if ((page_control != 0) && (page_control != 3)) + return 1; + + if (six_byte) + output_len = 4; + else + output_len = 8; + + p = rbuf + output_len; + last = rbuf + buflen - 1; + + switch(scsicmd[2] & 0x3f) { + case 0x01: /* r/w error recovery */ + output_len += ata_msense_rw_recovery(&p, last); + break; + + case 0x08: /* caching */ + output_len += ata_msense_caching(args->id, &p, last); + break; + + case 0x0a: { /* control mode */ + output_len += ata_msense_ctl_mode(&p, last); + break; + } + + case 0x3f: /* all pages */ + 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 */ + return 1; + } + + if (six_byte) { + output_len--; + rbuf[0] = output_len; + } else { + output_len -= 2; + rbuf[0] = output_len >> 8; + rbuf[1] = output_len; + } + + return 0; +} + +/** + * 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_lba48(args->id)) + n_sectors = ata_id_u64(args->id, 100); + else + n_sectors = ata_id_u32(args->id, 60); + n_sectors--; /* ATA TotalUserSectors - 1 */ + + tmp = n_sectors; /* note: truncates, if lba48 */ + if (args->cmd->cmnd[0] == READ_CAPACITY) { + /* 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 */ + rbuf[2] = n_sectors >> (8 * 7); + rbuf[3] = n_sectors >> (8 * 6); + rbuf[4] = n_sectors >> (8 * 5); + rbuf[5] = n_sectors >> (8 * 4); + 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_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"); + cmd->result = SAM_STAT_CHECK_CONDITION; + + cmd->sense_buffer[0] = 0x70; + cmd->sense_buffer[2] = ILLEGAL_REQUEST; + cmd->sense_buffer[7] = 14 - 8; /* addnl. sense len. FIXME: correct? */ + cmd->sense_buffer[12] = asc; + cmd->sense_buffer[13] = ascq; + + done(cmd); +} + +static int atapi_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat) +{ + struct scsi_cmnd *cmd = qc->scsicmd; + + if (unlikely(drv_stat & (ATA_ERR | ATA_BUSY | ATA_DRQ))) { + DPRINTK("request check condition\n"); + + cmd->result = SAM_STAT_CHECK_CONDITION; + + qc->scsidone(cmd); + + return 1; + } else { + u8 *scsicmd = cmd->cmnd; + + if (scsicmd[0] == INQUIRY) { + u8 *buf = NULL; + unsigned int buflen; + + buflen = ata_scsi_rbuf_get(cmd, &buf); + buf[2] = 0x5; + buf[3] = (buf[3] & 0xf0) | 2; + 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, 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 == SCSI_DATA_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 == SCSI_DATA_WRITE) { + 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 != SCSI_DATA_WRITE) + 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, 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; + +#ifndef ATA_ENABLE_ATAPI + if (unlikely(dev->class == ATA_DEV_ATAPI)) + return NULL; +#endif + + return dev; +} + +/** + * 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; + } + + 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; + + ap = (struct ata_port *) &scsidev->host->hostdata[0]; + + 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: + 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; + 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_bad_cdb(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_bad_cdb(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_bad_cdb(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_bad_cdb(cmd, done); + break; + + case REPORT_LUNS: + ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns); + break; + + /* mandantory commands we haven't implemented yet */ + case REQUEST_SENSE: + + /* all other commands */ + default: + ata_bad_scsiop(cmd, done); + break; + } +} + |