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48bdc8ec4a
It looks like they are either discarding or corrupting data when the FUA command is used, bad. Signed-off-by: Jens Axboe <axboe@suse.de>
2624 lines
64 KiB
C
2624 lines
64 KiB
C
/*
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* libata-scsi.c - helper library for ATA
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*
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* Maintained by: Jeff Garzik <jgarzik@pobox.com>
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* Please ALWAYS copy linux-ide@vger.kernel.org
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* on emails.
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*
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* Copyright 2003-2004 Red Hat, Inc. All rights reserved.
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* Copyright 2003-2004 Jeff Garzik
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*
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* libata documentation is available via 'make {ps|pdf}docs',
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* as Documentation/DocBook/libata.*
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*
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* Hardware documentation available from
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* - http://www.t10.org/
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* - http://www.t13.org/
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*
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*/
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#include <linux/kernel.h>
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#include <linux/blkdev.h>
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#include <linux/spinlock.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_eh.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_request.h>
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#include <linux/libata.h>
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#include <linux/hdreg.h>
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#include <asm/uaccess.h>
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#include "libata.h"
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#define SECTOR_SIZE 512
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typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc, const u8 *scsicmd);
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static struct ata_device *
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ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev);
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#define RW_RECOVERY_MPAGE 0x1
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#define RW_RECOVERY_MPAGE_LEN 12
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#define CACHE_MPAGE 0x8
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#define CACHE_MPAGE_LEN 20
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#define CONTROL_MPAGE 0xa
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#define CONTROL_MPAGE_LEN 12
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#define ALL_MPAGES 0x3f
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#define ALL_SUB_MPAGES 0xff
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static const u8 def_rw_recovery_mpage[] = {
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RW_RECOVERY_MPAGE,
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RW_RECOVERY_MPAGE_LEN - 2,
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(1 << 7) | /* AWRE, sat-r06 say it shall be 0 */
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(1 << 6), /* ARRE (auto read reallocation) */
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0, /* read retry count */
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0, 0, 0, 0,
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0, /* write retry count */
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0, 0, 0
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};
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static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
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CACHE_MPAGE,
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CACHE_MPAGE_LEN - 2,
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0, /* contains WCE, needs to be 0 for logic */
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0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, /* contains DRA, needs to be 0 for logic */
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0, 0, 0, 0, 0, 0, 0
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};
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static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
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CONTROL_MPAGE,
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CONTROL_MPAGE_LEN - 2,
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2, /* DSENSE=0, GLTSD=1 */
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0, /* [QAM+QERR may be 1, see 05-359r1] */
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0, 0, 0, 0, 0xff, 0xff,
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0, 30 /* extended self test time, see 05-359r1 */
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};
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static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
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void (*done)(struct scsi_cmnd *))
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{
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ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
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/* "Invalid field in cbd" */
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done(cmd);
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}
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/**
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* ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
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* @sdev: SCSI device for which BIOS geometry is to be determined
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* @bdev: block device associated with @sdev
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* @capacity: capacity of SCSI device
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* @geom: location to which geometry will be output
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*
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* Generic bios head/sector/cylinder calculator
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* used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
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* mapping. Some situations may arise where the disk is not
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* bootable if this is not used.
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*
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* LOCKING:
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* Defined by the SCSI layer. We don't really care.
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*
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* RETURNS:
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* Zero.
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*/
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int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
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sector_t capacity, int geom[])
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{
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geom[0] = 255;
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geom[1] = 63;
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sector_div(capacity, 255*63);
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geom[2] = capacity;
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return 0;
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}
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/**
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* ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
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* @scsidev: Device to which we are issuing command
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* @arg: User provided data for issuing command
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*
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* LOCKING:
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* Defined by the SCSI layer. We don't really care.
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*
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* RETURNS:
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* Zero on success, negative errno on error.
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*/
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int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
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{
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int rc = 0;
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u8 scsi_cmd[MAX_COMMAND_SIZE];
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u8 args[4], *argbuf = NULL;
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int argsize = 0;
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struct scsi_sense_hdr sshdr;
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enum dma_data_direction data_dir;
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if (NULL == (void *)arg)
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return -EINVAL;
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if (copy_from_user(args, arg, sizeof(args)))
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return -EFAULT;
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memset(scsi_cmd, 0, sizeof(scsi_cmd));
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if (args[3]) {
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argsize = SECTOR_SIZE * args[3];
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argbuf = kmalloc(argsize, GFP_KERNEL);
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if (argbuf == NULL) {
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rc = -ENOMEM;
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goto error;
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}
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scsi_cmd[1] = (4 << 1); /* PIO Data-in */
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scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
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block count in sector count field */
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data_dir = DMA_FROM_DEVICE;
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} else {
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scsi_cmd[1] = (3 << 1); /* Non-data */
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/* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
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data_dir = DMA_NONE;
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}
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scsi_cmd[0] = ATA_16;
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scsi_cmd[4] = args[2];
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if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */
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scsi_cmd[6] = args[3];
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scsi_cmd[8] = args[1];
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scsi_cmd[10] = 0x4f;
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scsi_cmd[12] = 0xc2;
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} else {
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scsi_cmd[6] = args[1];
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}
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scsi_cmd[14] = args[0];
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/* Good values for timeout and retries? Values below
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from scsi_ioctl_send_command() for default case... */
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if (scsi_execute_req(scsidev, scsi_cmd, data_dir, argbuf, argsize,
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&sshdr, (10*HZ), 5)) {
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rc = -EIO;
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goto error;
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}
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/* Need code to retrieve data from check condition? */
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if ((argbuf)
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&& copy_to_user((void *)(arg + sizeof(args)), argbuf, argsize))
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rc = -EFAULT;
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error:
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if (argbuf)
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kfree(argbuf);
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return rc;
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}
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/**
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* ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
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* @scsidev: Device to which we are issuing command
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* @arg: User provided data for issuing command
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*
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* LOCKING:
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* Defined by the SCSI layer. We don't really care.
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*
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* RETURNS:
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* Zero on success, negative errno on error.
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*/
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int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
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{
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int rc = 0;
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u8 scsi_cmd[MAX_COMMAND_SIZE];
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u8 args[7];
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struct scsi_sense_hdr sshdr;
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if (NULL == (void *)arg)
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return -EINVAL;
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if (copy_from_user(args, arg, sizeof(args)))
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return -EFAULT;
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memset(scsi_cmd, 0, sizeof(scsi_cmd));
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scsi_cmd[0] = ATA_16;
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scsi_cmd[1] = (3 << 1); /* Non-data */
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/* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
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scsi_cmd[4] = args[1];
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scsi_cmd[6] = args[2];
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scsi_cmd[8] = args[3];
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scsi_cmd[10] = args[4];
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scsi_cmd[12] = args[5];
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scsi_cmd[14] = args[0];
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/* Good values for timeout and retries? Values below
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from scsi_ioctl_send_command() for default case... */
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if (scsi_execute_req(scsidev, scsi_cmd, DMA_NONE, NULL, 0, &sshdr,
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(10*HZ), 5))
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rc = -EIO;
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/* Need code to retrieve data from check condition? */
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return rc;
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}
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int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
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{
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struct ata_port *ap;
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struct ata_device *dev;
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int val = -EINVAL, rc = -EINVAL;
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ap = (struct ata_port *) &scsidev->host->hostdata[0];
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if (!ap)
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goto out;
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dev = ata_scsi_find_dev(ap, scsidev);
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if (!dev) {
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rc = -ENODEV;
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goto out;
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}
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switch (cmd) {
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case ATA_IOC_GET_IO32:
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val = 0;
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if (copy_to_user(arg, &val, 1))
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return -EFAULT;
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return 0;
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case ATA_IOC_SET_IO32:
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val = (unsigned long) arg;
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if (val != 0)
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return -EINVAL;
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return 0;
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case HDIO_DRIVE_CMD:
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if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
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return -EACCES;
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return ata_cmd_ioctl(scsidev, arg);
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case HDIO_DRIVE_TASK:
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if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
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return -EACCES;
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return ata_task_ioctl(scsidev, arg);
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default:
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rc = -ENOTTY;
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break;
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}
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out:
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return rc;
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}
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/**
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* ata_scsi_qc_new - acquire new ata_queued_cmd reference
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* @ap: ATA port to which the new command is attached
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* @dev: ATA device to which the new command is attached
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* @cmd: SCSI command that originated this ATA command
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* @done: SCSI command completion function
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*
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* Obtain a reference to an unused ata_queued_cmd structure,
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* which is the basic libata structure representing a single
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* ATA command sent to the hardware.
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*
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* If a command was available, fill in the SCSI-specific
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* portions of the structure with information on the
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* current command.
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*
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* LOCKING:
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* spin_lock_irqsave(host_set lock)
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*
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* RETURNS:
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* Command allocated, or %NULL if none available.
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*/
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struct ata_queued_cmd *ata_scsi_qc_new(struct ata_port *ap,
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struct ata_device *dev,
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struct scsi_cmnd *cmd,
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void (*done)(struct scsi_cmnd *))
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{
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struct ata_queued_cmd *qc;
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qc = ata_qc_new_init(ap, dev);
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if (qc) {
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qc->scsicmd = cmd;
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qc->scsidone = done;
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if (cmd->use_sg) {
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qc->__sg = (struct scatterlist *) cmd->request_buffer;
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qc->n_elem = cmd->use_sg;
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} else {
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qc->__sg = &qc->sgent;
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qc->n_elem = 1;
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}
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} else {
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cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
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done(cmd);
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}
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return qc;
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}
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/**
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* ata_dump_status - user friendly display of error info
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* @id: id of the port in question
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* @tf: ptr to filled out taskfile
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*
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* Decode and dump the ATA error/status registers for the user so
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* that they have some idea what really happened at the non
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* make-believe layer.
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*
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* LOCKING:
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* inherited from caller
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*/
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void ata_dump_status(unsigned id, struct ata_taskfile *tf)
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{
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u8 stat = tf->command, err = tf->feature;
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printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
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if (stat & ATA_BUSY) {
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printk("Busy }\n"); /* Data is not valid in this case */
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} else {
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if (stat & 0x40) printk("DriveReady ");
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if (stat & 0x20) printk("DeviceFault ");
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if (stat & 0x10) printk("SeekComplete ");
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if (stat & 0x08) printk("DataRequest ");
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if (stat & 0x04) printk("CorrectedError ");
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if (stat & 0x02) printk("Index ");
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if (stat & 0x01) printk("Error ");
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printk("}\n");
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if (err) {
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printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
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if (err & 0x04) printk("DriveStatusError ");
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if (err & 0x80) {
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if (err & 0x04) printk("BadCRC ");
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else printk("Sector ");
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}
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if (err & 0x40) printk("UncorrectableError ");
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if (err & 0x10) printk("SectorIdNotFound ");
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if (err & 0x02) printk("TrackZeroNotFound ");
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if (err & 0x01) printk("AddrMarkNotFound ");
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printk("}\n");
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}
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}
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}
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int ata_scsi_device_resume(struct scsi_device *sdev)
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{
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struct ata_port *ap = (struct ata_port *) &sdev->host->hostdata[0];
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struct ata_device *dev = &ap->device[sdev->id];
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return ata_device_resume(ap, dev);
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}
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int ata_scsi_device_suspend(struct scsi_device *sdev)
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{
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struct ata_port *ap = (struct ata_port *) &sdev->host->hostdata[0];
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struct ata_device *dev = &ap->device[sdev->id];
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return ata_device_suspend(ap, dev);
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}
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/**
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* ata_to_sense_error - convert ATA error to SCSI error
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* @id: ATA device number
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* @drv_stat: value contained in ATA status register
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* @drv_err: value contained in ATA error register
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* @sk: the sense key we'll fill out
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* @asc: the additional sense code we'll fill out
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* @ascq: the additional sense code qualifier we'll fill out
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*
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* Converts an ATA error into a SCSI error. Fill out pointers to
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* SK, ASC, and ASCQ bytes for later use in fixed or descriptor
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* format sense blocks.
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*
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* LOCKING:
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* spin_lock_irqsave(host_set lock)
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*/
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void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc,
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u8 *ascq)
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{
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int i;
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/* Based on the 3ware driver translation table */
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static const unsigned char sense_table[][4] = {
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/* BBD|ECC|ID|MAR */
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{0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
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/* BBD|ECC|ID */
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{0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
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/* ECC|MC|MARK */
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{0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
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/* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
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{0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
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/* MC|ID|ABRT|TRK0|MARK */
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{0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
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/* MCR|MARK */
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{0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
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/* Bad address mark */
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{0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
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/* TRK0 */
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{0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
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/* Abort & !ICRC */
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{0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
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/* Media change request */
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{0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
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/* SRV */
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{0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
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/* Media change */
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{0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
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/* ECC */
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{0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
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/* BBD - block marked bad */
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{0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
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{0xFF, 0xFF, 0xFF, 0xFF}, // END mark
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};
|
|
static const unsigned char stat_table[][4] = {
|
|
/* Must be first because BUSY means no other bits valid */
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|
{0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
|
|
{0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
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|
{0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
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|
{0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
|
|
{0xFF, 0xFF, 0xFF, 0xFF}, // END mark
|
|
};
|
|
|
|
/*
|
|
* Is this an error we can process/parse
|
|
*/
|
|
if (drv_stat & ATA_BUSY) {
|
|
drv_err = 0; /* Ignore the err bits, they're invalid */
|
|
}
|
|
|
|
if (drv_err) {
|
|
/* Look for drv_err */
|
|
for (i = 0; sense_table[i][0] != 0xFF; i++) {
|
|
/* Look for best matches first */
|
|
if ((sense_table[i][0] & drv_err) ==
|
|
sense_table[i][0]) {
|
|
*sk = sense_table[i][1];
|
|
*asc = sense_table[i][2];
|
|
*ascq = sense_table[i][3];
|
|
goto translate_done;
|
|
}
|
|
}
|
|
/* No immediate match */
|
|
printk(KERN_WARNING "ata%u: no sense translation for "
|
|
"error 0x%02x\n", id, drv_err);
|
|
}
|
|
|
|
/* Fall back to interpreting status bits */
|
|
for (i = 0; stat_table[i][0] != 0xFF; i++) {
|
|
if (stat_table[i][0] & drv_stat) {
|
|
*sk = stat_table[i][1];
|
|
*asc = stat_table[i][2];
|
|
*ascq = stat_table[i][3];
|
|
goto translate_done;
|
|
}
|
|
}
|
|
/* No error? Undecoded? */
|
|
printk(KERN_WARNING "ata%u: no sense translation for status: 0x%02x\n",
|
|
id, drv_stat);
|
|
|
|
/* For our last chance pick, use medium read error because
|
|
* it's much more common than an ATA drive telling you a write
|
|
* has failed.
|
|
*/
|
|
*sk = MEDIUM_ERROR;
|
|
*asc = 0x11; /* "unrecovered read error" */
|
|
*ascq = 0x04; /* "auto-reallocation failed" */
|
|
|
|
translate_done:
|
|
printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x to "
|
|
"SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", id, drv_stat, drv_err,
|
|
*sk, *asc, *ascq);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* ata_gen_ata_desc_sense - Generate check condition sense block.
|
|
* @qc: Command that completed.
|
|
*
|
|
* This function is specific to the ATA descriptor format sense
|
|
* block specified for the ATA pass through commands. Regardless
|
|
* of whether the command errored or not, return a sense
|
|
* block. Copy all controller registers into the sense
|
|
* block. Clear sense key, ASC & ASCQ if there is no error.
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host_set lock)
|
|
*/
|
|
void ata_gen_ata_desc_sense(struct ata_queued_cmd *qc)
|
|
{
|
|
struct scsi_cmnd *cmd = qc->scsicmd;
|
|
struct ata_taskfile *tf = &qc->tf;
|
|
unsigned char *sb = cmd->sense_buffer;
|
|
unsigned char *desc = sb + 8;
|
|
|
|
memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
|
|
|
|
cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
|
|
|
|
/*
|
|
* Read the controller registers.
|
|
*/
|
|
assert(NULL != qc->ap->ops->tf_read);
|
|
qc->ap->ops->tf_read(qc->ap, tf);
|
|
|
|
/*
|
|
* Use ata_to_sense_error() to map status register bits
|
|
* onto sense key, asc & ascq.
|
|
*/
|
|
if (tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
|
|
ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
|
|
&sb[1], &sb[2], &sb[3]);
|
|
sb[1] &= 0x0f;
|
|
}
|
|
|
|
/*
|
|
* Sense data is current and format is descriptor.
|
|
*/
|
|
sb[0] = 0x72;
|
|
|
|
desc[0] = 0x09;
|
|
|
|
/*
|
|
* Set length of additional sense data.
|
|
* Since we only populate descriptor 0, the total
|
|
* length is the same (fixed) length as descriptor 0.
|
|
*/
|
|
desc[1] = sb[7] = 14;
|
|
|
|
/*
|
|
* Copy registers into sense buffer.
|
|
*/
|
|
desc[2] = 0x00;
|
|
desc[3] = tf->feature; /* == error reg */
|
|
desc[5] = tf->nsect;
|
|
desc[7] = tf->lbal;
|
|
desc[9] = tf->lbam;
|
|
desc[11] = tf->lbah;
|
|
desc[12] = tf->device;
|
|
desc[13] = tf->command; /* == status reg */
|
|
|
|
/*
|
|
* Fill in Extend bit, and the high order bytes
|
|
* if applicable.
|
|
*/
|
|
if (tf->flags & ATA_TFLAG_LBA48) {
|
|
desc[2] |= 0x01;
|
|
desc[4] = tf->hob_nsect;
|
|
desc[6] = tf->hob_lbal;
|
|
desc[8] = tf->hob_lbam;
|
|
desc[10] = tf->hob_lbah;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ata_gen_fixed_sense - generate a SCSI fixed sense block
|
|
* @qc: Command that we are erroring out
|
|
*
|
|
* Leverage ata_to_sense_error() to give us the codes. Fit our
|
|
* LBA in here if there's room.
|
|
*
|
|
* LOCKING:
|
|
* inherited from caller
|
|
*/
|
|
void ata_gen_fixed_sense(struct ata_queued_cmd *qc)
|
|
{
|
|
struct scsi_cmnd *cmd = qc->scsicmd;
|
|
struct ata_taskfile *tf = &qc->tf;
|
|
unsigned char *sb = cmd->sense_buffer;
|
|
|
|
memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
|
|
|
|
cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
|
|
|
|
/*
|
|
* Read the controller registers.
|
|
*/
|
|
assert(NULL != qc->ap->ops->tf_read);
|
|
qc->ap->ops->tf_read(qc->ap, tf);
|
|
|
|
/*
|
|
* Use ata_to_sense_error() to map status register bits
|
|
* onto sense key, asc & ascq.
|
|
*/
|
|
if (tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
|
|
ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
|
|
&sb[2], &sb[12], &sb[13]);
|
|
sb[2] &= 0x0f;
|
|
}
|
|
|
|
sb[0] = 0x70;
|
|
sb[7] = 0x0a;
|
|
|
|
if (tf->flags & ATA_TFLAG_LBA48) {
|
|
/* TODO: find solution for LBA48 descriptors */
|
|
}
|
|
|
|
else if (tf->flags & ATA_TFLAG_LBA) {
|
|
/* A small (28b) LBA will fit in the 32b info field */
|
|
sb[0] |= 0x80; /* set valid bit */
|
|
sb[3] = tf->device & 0x0f;
|
|
sb[4] = tf->lbah;
|
|
sb[5] = tf->lbam;
|
|
sb[6] = tf->lbal;
|
|
}
|
|
|
|
else {
|
|
/* TODO: C/H/S */
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ata_scsi_slave_config - Set SCSI device attributes
|
|
* @sdev: SCSI device to examine
|
|
*
|
|
* This is called before we actually start reading
|
|
* and writing to the device, to configure certain
|
|
* SCSI mid-layer behaviors.
|
|
*
|
|
* LOCKING:
|
|
* Defined by SCSI layer. We don't really care.
|
|
*/
|
|
|
|
int ata_scsi_slave_config(struct scsi_device *sdev)
|
|
{
|
|
sdev->use_10_for_rw = 1;
|
|
sdev->use_10_for_ms = 1;
|
|
|
|
blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD);
|
|
|
|
if (sdev->id < ATA_MAX_DEVICES) {
|
|
struct ata_port *ap;
|
|
struct ata_device *dev;
|
|
|
|
ap = (struct ata_port *) &sdev->host->hostdata[0];
|
|
dev = &ap->device[sdev->id];
|
|
|
|
/* TODO: 1024 is an arbitrary number, not the
|
|
* hardware maximum. This should be increased to
|
|
* 65534 when Jens Axboe's patch for dynamically
|
|
* determining max_sectors is merged.
|
|
*/
|
|
if ((dev->flags & ATA_DFLAG_LBA48) &&
|
|
((dev->flags & ATA_DFLAG_LOCK_SECTORS) == 0)) {
|
|
/*
|
|
* do not overwrite sdev->host->max_sectors, since
|
|
* other drives on this host may not support LBA48
|
|
*/
|
|
blk_queue_max_sectors(sdev->request_queue, 2048);
|
|
}
|
|
|
|
/*
|
|
* SATA DMA transfers must be multiples of 4 byte, so
|
|
* we need to pad ATAPI transfers using an extra sg.
|
|
* Decrement max hw segments accordingly.
|
|
*/
|
|
if (dev->class == ATA_DEV_ATAPI) {
|
|
request_queue_t *q = sdev->request_queue;
|
|
blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
|
|
}
|
|
}
|
|
|
|
return 0; /* scsi layer doesn't check return value, sigh */
|
|
}
|
|
|
|
/**
|
|
* ata_scsi_error - SCSI layer error handler callback
|
|
* @host: SCSI host on which error occurred
|
|
*
|
|
* Handles SCSI-layer-thrown error events.
|
|
*
|
|
* LOCKING:
|
|
* Inherited from SCSI layer (none, can sleep)
|
|
*
|
|
* RETURNS:
|
|
* Zero.
|
|
*/
|
|
|
|
int ata_scsi_error(struct Scsi_Host *host)
|
|
{
|
|
struct ata_port *ap;
|
|
|
|
DPRINTK("ENTER\n");
|
|
|
|
ap = (struct ata_port *) &host->hostdata[0];
|
|
ap->ops->eng_timeout(ap);
|
|
|
|
/* TODO: this is per-command; when queueing is supported
|
|
* this code will either change or move to a more
|
|
* appropriate place
|
|
*/
|
|
host->host_failed--;
|
|
INIT_LIST_HEAD(&host->eh_cmd_q);
|
|
|
|
DPRINTK("EXIT\n");
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
|
|
* @qc: Storage for translated ATA taskfile
|
|
* @scsicmd: SCSI command to translate
|
|
*
|
|
* Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
|
|
* (to start). Perhaps these commands should be preceded by
|
|
* CHECK POWER MODE to see what power mode the device is already in.
|
|
* [See SAT revision 5 at www.t10.org]
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host_set lock)
|
|
*
|
|
* RETURNS:
|
|
* Zero on success, non-zero on error.
|
|
*/
|
|
|
|
static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc,
|
|
const u8 *scsicmd)
|
|
{
|
|
struct ata_taskfile *tf = &qc->tf;
|
|
|
|
tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
|
|
tf->protocol = ATA_PROT_NODATA;
|
|
if (scsicmd[1] & 0x1) {
|
|
; /* ignore IMMED bit, violates sat-r05 */
|
|
}
|
|
if (scsicmd[4] & 0x2)
|
|
goto invalid_fld; /* LOEJ bit set not supported */
|
|
if (((scsicmd[4] >> 4) & 0xf) != 0)
|
|
goto invalid_fld; /* power conditions not supported */
|
|
if (scsicmd[4] & 0x1) {
|
|
tf->nsect = 1; /* 1 sector, lba=0 */
|
|
|
|
if (qc->dev->flags & ATA_DFLAG_LBA) {
|
|
qc->tf.flags |= ATA_TFLAG_LBA;
|
|
|
|
tf->lbah = 0x0;
|
|
tf->lbam = 0x0;
|
|
tf->lbal = 0x0;
|
|
tf->device |= ATA_LBA;
|
|
} else {
|
|
/* CHS */
|
|
tf->lbal = 0x1; /* sect */
|
|
tf->lbam = 0x0; /* cyl low */
|
|
tf->lbah = 0x0; /* cyl high */
|
|
}
|
|
|
|
tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
|
|
} else {
|
|
tf->nsect = 0; /* time period value (0 implies now) */
|
|
tf->command = ATA_CMD_STANDBY;
|
|
/* Consider: ATA STANDBY IMMEDIATE command */
|
|
}
|
|
/*
|
|
* Standby and Idle condition timers could be implemented but that
|
|
* would require libata to implement the Power condition mode page
|
|
* and allow the user to change it. Changing mode pages requires
|
|
* MODE SELECT to be implemented.
|
|
*/
|
|
|
|
return 0;
|
|
|
|
invalid_fld:
|
|
ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
|
|
/* "Invalid field in cbd" */
|
|
return 1;
|
|
}
|
|
|
|
|
|
/**
|
|
* ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
|
|
* @qc: Storage for translated ATA taskfile
|
|
* @scsicmd: SCSI command to translate (ignored)
|
|
*
|
|
* Sets up an ATA taskfile to issue FLUSH CACHE or
|
|
* FLUSH CACHE EXT.
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host_set lock)
|
|
*
|
|
* RETURNS:
|
|
* Zero on success, non-zero on error.
|
|
*/
|
|
|
|
static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
|
|
{
|
|
struct ata_taskfile *tf = &qc->tf;
|
|
|
|
tf->flags |= ATA_TFLAG_DEVICE;
|
|
tf->protocol = ATA_PROT_NODATA;
|
|
|
|
if ((qc->dev->flags & ATA_DFLAG_LBA48) &&
|
|
(ata_id_has_flush_ext(qc->dev->id)))
|
|
tf->command = ATA_CMD_FLUSH_EXT;
|
|
else
|
|
tf->command = ATA_CMD_FLUSH;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* scsi_6_lba_len - Get LBA and transfer length
|
|
* @scsicmd: SCSI command to translate
|
|
*
|
|
* Calculate LBA and transfer length for 6-byte commands.
|
|
*
|
|
* RETURNS:
|
|
* @plba: the LBA
|
|
* @plen: the transfer length
|
|
*/
|
|
|
|
static void scsi_6_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
|
|
{
|
|
u64 lba = 0;
|
|
u32 len = 0;
|
|
|
|
VPRINTK("six-byte command\n");
|
|
|
|
lba |= ((u64)scsicmd[2]) << 8;
|
|
lba |= ((u64)scsicmd[3]);
|
|
|
|
len |= ((u32)scsicmd[4]);
|
|
|
|
*plba = lba;
|
|
*plen = len;
|
|
}
|
|
|
|
/**
|
|
* scsi_10_lba_len - Get LBA and transfer length
|
|
* @scsicmd: SCSI command to translate
|
|
*
|
|
* Calculate LBA and transfer length for 10-byte commands.
|
|
*
|
|
* RETURNS:
|
|
* @plba: the LBA
|
|
* @plen: the transfer length
|
|
*/
|
|
|
|
static void scsi_10_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
|
|
{
|
|
u64 lba = 0;
|
|
u32 len = 0;
|
|
|
|
VPRINTK("ten-byte command\n");
|
|
|
|
lba |= ((u64)scsicmd[2]) << 24;
|
|
lba |= ((u64)scsicmd[3]) << 16;
|
|
lba |= ((u64)scsicmd[4]) << 8;
|
|
lba |= ((u64)scsicmd[5]);
|
|
|
|
len |= ((u32)scsicmd[7]) << 8;
|
|
len |= ((u32)scsicmd[8]);
|
|
|
|
*plba = lba;
|
|
*plen = len;
|
|
}
|
|
|
|
/**
|
|
* scsi_16_lba_len - Get LBA and transfer length
|
|
* @scsicmd: SCSI command to translate
|
|
*
|
|
* Calculate LBA and transfer length for 16-byte commands.
|
|
*
|
|
* RETURNS:
|
|
* @plba: the LBA
|
|
* @plen: the transfer length
|
|
*/
|
|
|
|
static void scsi_16_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
|
|
{
|
|
u64 lba = 0;
|
|
u32 len = 0;
|
|
|
|
VPRINTK("sixteen-byte command\n");
|
|
|
|
lba |= ((u64)scsicmd[2]) << 56;
|
|
lba |= ((u64)scsicmd[3]) << 48;
|
|
lba |= ((u64)scsicmd[4]) << 40;
|
|
lba |= ((u64)scsicmd[5]) << 32;
|
|
lba |= ((u64)scsicmd[6]) << 24;
|
|
lba |= ((u64)scsicmd[7]) << 16;
|
|
lba |= ((u64)scsicmd[8]) << 8;
|
|
lba |= ((u64)scsicmd[9]);
|
|
|
|
len |= ((u32)scsicmd[10]) << 24;
|
|
len |= ((u32)scsicmd[11]) << 16;
|
|
len |= ((u32)scsicmd[12]) << 8;
|
|
len |= ((u32)scsicmd[13]);
|
|
|
|
*plba = lba;
|
|
*plen = len;
|
|
}
|
|
|
|
/**
|
|
* ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
|
|
* @qc: Storage for translated ATA taskfile
|
|
* @scsicmd: SCSI command to translate
|
|
*
|
|
* Converts SCSI VERIFY command to an ATA READ VERIFY command.
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host_set lock)
|
|
*
|
|
* RETURNS:
|
|
* Zero on success, non-zero on error.
|
|
*/
|
|
|
|
static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
|
|
{
|
|
struct ata_taskfile *tf = &qc->tf;
|
|
struct ata_device *dev = qc->dev;
|
|
u64 dev_sectors = qc->dev->n_sectors;
|
|
u64 block;
|
|
u32 n_block;
|
|
|
|
tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
|
|
tf->protocol = ATA_PROT_NODATA;
|
|
|
|
if (scsicmd[0] == VERIFY)
|
|
scsi_10_lba_len(scsicmd, &block, &n_block);
|
|
else if (scsicmd[0] == VERIFY_16)
|
|
scsi_16_lba_len(scsicmd, &block, &n_block);
|
|
else
|
|
goto invalid_fld;
|
|
|
|
if (!n_block)
|
|
goto nothing_to_do;
|
|
if (block >= dev_sectors)
|
|
goto out_of_range;
|
|
if ((block + n_block) > dev_sectors)
|
|
goto out_of_range;
|
|
|
|
if (dev->flags & ATA_DFLAG_LBA) {
|
|
tf->flags |= ATA_TFLAG_LBA;
|
|
|
|
if (dev->flags & ATA_DFLAG_LBA48) {
|
|
if (n_block > (64 * 1024))
|
|
goto invalid_fld;
|
|
|
|
/* use LBA48 */
|
|
tf->flags |= ATA_TFLAG_LBA48;
|
|
tf->command = ATA_CMD_VERIFY_EXT;
|
|
|
|
tf->hob_nsect = (n_block >> 8) & 0xff;
|
|
|
|
tf->hob_lbah = (block >> 40) & 0xff;
|
|
tf->hob_lbam = (block >> 32) & 0xff;
|
|
tf->hob_lbal = (block >> 24) & 0xff;
|
|
} else {
|
|
if (n_block > 256)
|
|
goto invalid_fld;
|
|
|
|
/* use LBA28 */
|
|
tf->command = ATA_CMD_VERIFY;
|
|
|
|
tf->device |= (block >> 24) & 0xf;
|
|
}
|
|
|
|
tf->nsect = n_block & 0xff;
|
|
|
|
tf->lbah = (block >> 16) & 0xff;
|
|
tf->lbam = (block >> 8) & 0xff;
|
|
tf->lbal = block & 0xff;
|
|
|
|
tf->device |= ATA_LBA;
|
|
} else {
|
|
/* CHS */
|
|
u32 sect, head, cyl, track;
|
|
|
|
if (n_block > 256)
|
|
goto invalid_fld;
|
|
|
|
/* Convert LBA to CHS */
|
|
track = (u32)block / dev->sectors;
|
|
cyl = track / dev->heads;
|
|
head = track % dev->heads;
|
|
sect = (u32)block % dev->sectors + 1;
|
|
|
|
DPRINTK("block %u track %u cyl %u head %u sect %u\n",
|
|
(u32)block, track, cyl, head, sect);
|
|
|
|
/* Check whether the converted CHS can fit.
|
|
Cylinder: 0-65535
|
|
Head: 0-15
|
|
Sector: 1-255*/
|
|
if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
|
|
goto out_of_range;
|
|
|
|
tf->command = ATA_CMD_VERIFY;
|
|
tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
|
|
tf->lbal = sect;
|
|
tf->lbam = cyl;
|
|
tf->lbah = cyl >> 8;
|
|
tf->device |= head;
|
|
}
|
|
|
|
return 0;
|
|
|
|
invalid_fld:
|
|
ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
|
|
/* "Invalid field in cbd" */
|
|
return 1;
|
|
|
|
out_of_range:
|
|
ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0);
|
|
/* "Logical Block Address out of range" */
|
|
return 1;
|
|
|
|
nothing_to_do:
|
|
qc->scsicmd->result = SAM_STAT_GOOD;
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
|
|
* @qc: Storage for translated ATA taskfile
|
|
* @scsicmd: SCSI command to translate
|
|
*
|
|
* Converts any of six SCSI read/write commands into the
|
|
* ATA counterpart, including starting sector (LBA),
|
|
* sector count, and taking into account the device's LBA48
|
|
* support.
|
|
*
|
|
* Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
|
|
* %WRITE_16 are currently supported.
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host_set lock)
|
|
*
|
|
* RETURNS:
|
|
* Zero on success, non-zero on error.
|
|
*/
|
|
|
|
static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
|
|
{
|
|
struct ata_taskfile *tf = &qc->tf;
|
|
struct ata_device *dev = qc->dev;
|
|
u64 block;
|
|
u32 n_block;
|
|
|
|
tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
|
|
|
|
if (scsicmd[0] == WRITE_10 || scsicmd[0] == WRITE_6 ||
|
|
scsicmd[0] == WRITE_16)
|
|
tf->flags |= ATA_TFLAG_WRITE;
|
|
|
|
/* Calculate the SCSI LBA, 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_LBA) {
|
|
tf->flags |= ATA_TFLAG_LBA;
|
|
|
|
if (dev->flags & ATA_DFLAG_LBA48) {
|
|
/* The request -may- be too large for LBA48. */
|
|
if ((block >> 48) || (n_block > 65536))
|
|
goto out_of_range;
|
|
|
|
/* use LBA48 */
|
|
tf->flags |= ATA_TFLAG_LBA48;
|
|
|
|
tf->hob_nsect = (n_block >> 8) & 0xff;
|
|
|
|
tf->hob_lbah = (block >> 40) & 0xff;
|
|
tf->hob_lbam = (block >> 32) & 0xff;
|
|
tf->hob_lbal = (block >> 24) & 0xff;
|
|
} else {
|
|
/* use LBA28 */
|
|
|
|
/* The request -may- be too large for LBA28. */
|
|
if ((block >> 28) || (n_block > 256))
|
|
goto out_of_range;
|
|
|
|
tf->device |= (block >> 24) & 0xf;
|
|
}
|
|
|
|
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 ((block >> 28) || (n_block > 256))
|
|
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 int 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) {
|
|
/* The ata_gen_..._sense routines fill in tf */
|
|
ata_dump_status(qc->ap->id, &qc->tf);
|
|
}
|
|
|
|
qc->scsidone(cmd);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ata_scsi_translate - Translate then issue SCSI command to ATA device
|
|
* @ap: ATA port to which the command is addressed
|
|
* @dev: ATA device to which the command is addressed
|
|
* @cmd: SCSI command to execute
|
|
* @done: SCSI command completion function
|
|
* @xlat_func: Actor which translates @cmd to an ATA taskfile
|
|
*
|
|
* Our ->queuecommand() function has decided that the SCSI
|
|
* command issued can be directly translated into an ATA
|
|
* command, rather than handled internally.
|
|
*
|
|
* This function sets up an ata_queued_cmd structure for the
|
|
* SCSI command, and sends that ata_queued_cmd to the hardware.
|
|
*
|
|
* The xlat_func argument (actor) returns 0 if ready to execute
|
|
* ATA command, else 1 to finish translation. If 1 is returned
|
|
* then cmd->result (and possibly cmd->sense_buffer) are assumed
|
|
* to be set reflecting an error condition or clean (early)
|
|
* termination.
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host_set lock)
|
|
*/
|
|
|
|
static void ata_scsi_translate(struct ata_port *ap, struct ata_device *dev,
|
|
struct scsi_cmnd *cmd,
|
|
void (*done)(struct scsi_cmnd *),
|
|
ata_xlat_func_t xlat_func)
|
|
{
|
|
struct ata_queued_cmd *qc;
|
|
u8 *scsicmd = cmd->cmnd;
|
|
|
|
VPRINTK("ENTER\n");
|
|
|
|
qc = ata_scsi_qc_new(ap, dev, cmd, done);
|
|
if (!qc)
|
|
goto err_mem;
|
|
|
|
/* data is present; dma-map it */
|
|
if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
|
|
cmd->sc_data_direction == DMA_TO_DEVICE) {
|
|
if (unlikely(cmd->request_bufflen < 1)) {
|
|
printk(KERN_WARNING "ata%u(%u): WARNING: zero len r/w req\n",
|
|
ap->id, dev->devno);
|
|
goto err_did;
|
|
}
|
|
|
|
if (cmd->use_sg)
|
|
ata_sg_init(qc, cmd->request_buffer, cmd->use_sg);
|
|
else
|
|
ata_sg_init_one(qc, cmd->request_buffer,
|
|
cmd->request_bufflen);
|
|
|
|
qc->dma_dir = cmd->sc_data_direction;
|
|
}
|
|
|
|
qc->complete_fn = ata_scsi_qc_complete;
|
|
|
|
if (xlat_func(qc, scsicmd))
|
|
goto early_finish;
|
|
|
|
/* select device, send command to hardware */
|
|
if (ata_qc_issue(qc))
|
|
goto err_did;
|
|
|
|
VPRINTK("EXIT\n");
|
|
return;
|
|
|
|
early_finish:
|
|
ata_qc_free(qc);
|
|
done(cmd);
|
|
DPRINTK("EXIT - early finish (good or error)\n");
|
|
return;
|
|
|
|
err_did:
|
|
ata_qc_free(qc);
|
|
err_mem:
|
|
cmd->result = (DID_ERROR << 16);
|
|
done(cmd);
|
|
DPRINTK("EXIT - internal\n");
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* ata_scsi_rbuf_get - Map response buffer.
|
|
* @cmd: SCSI command containing buffer to be mapped.
|
|
* @buf_out: Pointer to mapped area.
|
|
*
|
|
* Maps buffer contained within SCSI command @cmd.
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host_set lock)
|
|
*
|
|
* RETURNS:
|
|
* Length of response buffer.
|
|
*/
|
|
|
|
static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
|
|
{
|
|
u8 *buf;
|
|
unsigned int buflen;
|
|
|
|
if (cmd->use_sg) {
|
|
struct scatterlist *sg;
|
|
|
|
sg = (struct scatterlist *) cmd->request_buffer;
|
|
buf = kmap_atomic(sg->page, KM_USER0) + sg->offset;
|
|
buflen = sg->length;
|
|
} else {
|
|
buf = cmd->request_buffer;
|
|
buflen = cmd->request_bufflen;
|
|
}
|
|
|
|
*buf_out = buf;
|
|
return buflen;
|
|
}
|
|
|
|
/**
|
|
* ata_scsi_rbuf_put - Unmap response buffer.
|
|
* @cmd: SCSI command containing buffer to be unmapped.
|
|
* @buf: buffer to unmap
|
|
*
|
|
* Unmaps response buffer contained within @cmd.
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host_set lock)
|
|
*/
|
|
|
|
static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
|
|
{
|
|
if (cmd->use_sg) {
|
|
struct scatterlist *sg;
|
|
|
|
sg = (struct scatterlist *) cmd->request_buffer;
|
|
kunmap_atomic(buf - sg->offset, KM_USER0);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ata_scsi_rbuf_fill - wrapper for SCSI command simulators
|
|
* @args: device IDENTIFY data / SCSI command of interest.
|
|
* @actor: Callback hook for desired SCSI command simulator
|
|
*
|
|
* Takes care of the hard work of simulating a SCSI command...
|
|
* Mapping the response buffer, calling the command's handler,
|
|
* and handling the handler's return value. This return value
|
|
* indicates whether the handler wishes the SCSI command to be
|
|
* completed successfully (0), or not (in which case cmd->result
|
|
* and sense buffer are assumed to be set).
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host_set lock)
|
|
*/
|
|
|
|
void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
|
|
unsigned int (*actor) (struct ata_scsi_args *args,
|
|
u8 *rbuf, unsigned int buflen))
|
|
{
|
|
u8 *rbuf;
|
|
unsigned int buflen, rc;
|
|
struct scsi_cmnd *cmd = args->cmd;
|
|
|
|
buflen = ata_scsi_rbuf_get(cmd, &rbuf);
|
|
memset(rbuf, 0, buflen);
|
|
rc = actor(args, rbuf, buflen);
|
|
ata_scsi_rbuf_put(cmd, rbuf);
|
|
|
|
if (rc == 0)
|
|
cmd->result = SAM_STAT_GOOD;
|
|
args->done(cmd);
|
|
}
|
|
|
|
/**
|
|
* ata_scsiop_inq_std - Simulate INQUIRY command
|
|
* @args: device IDENTIFY data / SCSI command of interest.
|
|
* @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
|
|
* @buflen: Response buffer length.
|
|
*
|
|
* Returns standard device identification data associated
|
|
* with non-EVPD INQUIRY command output.
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host_set lock)
|
|
*/
|
|
|
|
unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
|
|
unsigned int buflen)
|
|
{
|
|
u8 hdr[] = {
|
|
TYPE_DISK,
|
|
0,
|
|
0x5, /* claim SPC-3 version compatibility */
|
|
2,
|
|
95 - 4
|
|
};
|
|
|
|
/* set scsi removeable (RMB) bit per ata bit */
|
|
if (ata_id_removeable(args->id))
|
|
hdr[1] |= (1 << 7);
|
|
|
|
VPRINTK("ENTER\n");
|
|
|
|
memcpy(rbuf, hdr, sizeof(hdr));
|
|
|
|
if (buflen > 35) {
|
|
memcpy(&rbuf[8], "ATA ", 8);
|
|
ata_dev_id_string(args->id, &rbuf[16], ATA_ID_PROD_OFS, 16);
|
|
ata_dev_id_string(args->id, &rbuf[32], ATA_ID_FW_REV_OFS, 4);
|
|
if (rbuf[32] == 0 || rbuf[32] == ' ')
|
|
memcpy(&rbuf[32], "n/a ", 4);
|
|
}
|
|
|
|
if (buflen > 63) {
|
|
const u8 versions[] = {
|
|
0x60, /* SAM-3 (no version claimed) */
|
|
|
|
0x03,
|
|
0x20, /* SBC-2 (no version claimed) */
|
|
|
|
0x02,
|
|
0x60 /* SPC-3 (no version claimed) */
|
|
};
|
|
|
|
memcpy(rbuf + 59, versions, sizeof(versions));
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ata_scsiop_inq_00 - Simulate INQUIRY EVPD page 0, list of pages
|
|
* @args: device IDENTIFY data / SCSI command of interest.
|
|
* @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
|
|
* @buflen: Response buffer length.
|
|
*
|
|
* Returns list of inquiry EVPD pages available.
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host_set lock)
|
|
*/
|
|
|
|
unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
|
|
unsigned int buflen)
|
|
{
|
|
const u8 pages[] = {
|
|
0x00, /* page 0x00, this page */
|
|
0x80, /* page 0x80, unit serial no page */
|
|
0x83 /* page 0x83, device ident page */
|
|
};
|
|
rbuf[3] = sizeof(pages); /* number of supported EVPD pages */
|
|
|
|
if (buflen > 6)
|
|
memcpy(rbuf + 4, pages, sizeof(pages));
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ata_scsiop_inq_80 - Simulate INQUIRY EVPD page 80, device serial number
|
|
* @args: device IDENTIFY data / SCSI command of interest.
|
|
* @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
|
|
* @buflen: Response buffer length.
|
|
*
|
|
* Returns ATA device serial number.
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host_set lock)
|
|
*/
|
|
|
|
unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
|
|
unsigned int buflen)
|
|
{
|
|
const u8 hdr[] = {
|
|
0,
|
|
0x80, /* this page code */
|
|
0,
|
|
ATA_SERNO_LEN, /* page len */
|
|
};
|
|
memcpy(rbuf, hdr, sizeof(hdr));
|
|
|
|
if (buflen > (ATA_SERNO_LEN + 4 - 1))
|
|
ata_dev_id_string(args->id, (unsigned char *) &rbuf[4],
|
|
ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const char * const inq_83_str = "Linux ATA-SCSI simulator";
|
|
|
|
/**
|
|
* ata_scsiop_inq_83 - Simulate INQUIRY EVPD page 83, device identity
|
|
* @args: device IDENTIFY data / SCSI command of interest.
|
|
* @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
|
|
* @buflen: Response buffer length.
|
|
*
|
|
* Returns device identification. Currently hardcoded to
|
|
* return "Linux ATA-SCSI simulator".
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host_set lock)
|
|
*/
|
|
|
|
unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
|
|
unsigned int buflen)
|
|
{
|
|
rbuf[1] = 0x83; /* this page code */
|
|
rbuf[3] = 4 + strlen(inq_83_str); /* page len */
|
|
|
|
/* our one and only identification descriptor (vendor-specific) */
|
|
if (buflen > (strlen(inq_83_str) + 4 + 4 - 1)) {
|
|
rbuf[4 + 0] = 2; /* code set: ASCII */
|
|
rbuf[4 + 3] = strlen(inq_83_str);
|
|
memcpy(rbuf + 4 + 4, inq_83_str, strlen(inq_83_str));
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ata_scsiop_noop - Command handler that simply returns success.
|
|
* @args: device IDENTIFY data / SCSI command of interest.
|
|
* @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
|
|
* @buflen: Response buffer length.
|
|
*
|
|
* No operation. Simply returns success to caller, to indicate
|
|
* that the caller should successfully complete this SCSI command.
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host_set lock)
|
|
*/
|
|
|
|
unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
|
|
unsigned int buflen)
|
|
{
|
|
VPRINTK("ENTER\n");
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ata_msense_push - Push data onto MODE SENSE data output buffer
|
|
* @ptr_io: (input/output) Location to store more output data
|
|
* @last: End of output data buffer
|
|
* @buf: Pointer to BLOB being added to output buffer
|
|
* @buflen: Length of BLOB
|
|
*
|
|
* Store MODE SENSE data on an output buffer.
|
|
*
|
|
* LOCKING:
|
|
* None.
|
|
*/
|
|
|
|
static void ata_msense_push(u8 **ptr_io, const u8 *last,
|
|
const u8 *buf, unsigned int buflen)
|
|
{
|
|
u8 *ptr = *ptr_io;
|
|
|
|
if ((ptr + buflen - 1) > last)
|
|
return;
|
|
|
|
memcpy(ptr, buf, buflen);
|
|
|
|
ptr += buflen;
|
|
|
|
*ptr_io = ptr;
|
|
}
|
|
|
|
/**
|
|
* ata_msense_caching - Simulate MODE SENSE caching info page
|
|
* @id: device IDENTIFY data
|
|
* @ptr_io: (input/output) Location to store more output data
|
|
* @last: End of output data buffer
|
|
*
|
|
* Generate a caching info page, which conditionally indicates
|
|
* write caching to the SCSI layer, depending on device
|
|
* capabilities.
|
|
*
|
|
* LOCKING:
|
|
* None.
|
|
*/
|
|
|
|
static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
|
|
const u8 *last)
|
|
{
|
|
u8 page[CACHE_MPAGE_LEN];
|
|
|
|
memcpy(page, def_cache_mpage, sizeof(page));
|
|
if (ata_id_wcache_enabled(id))
|
|
page[2] |= (1 << 2); /* write cache enable */
|
|
if (!ata_id_rahead_enabled(id))
|
|
page[12] |= (1 << 5); /* disable read ahead */
|
|
|
|
ata_msense_push(ptr_io, last, page, sizeof(page));
|
|
return sizeof(page);
|
|
}
|
|
|
|
/**
|
|
* ata_msense_ctl_mode - Simulate MODE SENSE control mode page
|
|
* @dev: Device associated with this MODE SENSE command
|
|
* @ptr_io: (input/output) Location to store more output data
|
|
* @last: End of output data buffer
|
|
*
|
|
* Generate a generic MODE SENSE control mode page.
|
|
*
|
|
* LOCKING:
|
|
* None.
|
|
*/
|
|
|
|
static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
|
|
{
|
|
ata_msense_push(ptr_io, last, def_control_mpage,
|
|
sizeof(def_control_mpage));
|
|
return sizeof(def_control_mpage);
|
|
}
|
|
|
|
/**
|
|
* ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
|
|
* @dev: Device associated with this MODE SENSE command
|
|
* @ptr_io: (input/output) Location to store more output data
|
|
* @last: End of output data buffer
|
|
*
|
|
* Generate a generic MODE SENSE r/w error recovery page.
|
|
*
|
|
* LOCKING:
|
|
* None.
|
|
*/
|
|
|
|
static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
|
|
{
|
|
|
|
ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
|
|
sizeof(def_rw_recovery_mpage));
|
|
return sizeof(def_rw_recovery_mpage);
|
|
}
|
|
|
|
/*
|
|
* 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 (!ata_id_has_fua(id))
|
|
return 0;
|
|
|
|
model[40] = '\0';
|
|
fw[8] = '\0';
|
|
|
|
ata_dev_id_string(id, model, ATA_ID_PROD_OFS, sizeof(model) - 1);
|
|
ata_dev_id_string(id, fw, ATA_ID_FW_REV_OFS, sizeof(fw) - 1);
|
|
|
|
if (strncmp(model, "Maxtor", 6))
|
|
return 1;
|
|
if (strncmp(fw, "BANC1G10", 8))
|
|
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 int 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);
|
|
return 0;
|
|
}
|
|
|
|
/* 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, ap->cdb_len);
|
|
qc->cdb[0] = REQUEST_SENSE;
|
|
qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
|
|
|
|
qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
|
|
qc->tf.command = ATA_CMD_PACKET;
|
|
|
|
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;
|
|
|
|
if (ata_qc_issue(qc)) {
|
|
qc->err_mask |= AC_ERR_OTHER;
|
|
ata_qc_complete(qc);
|
|
}
|
|
|
|
DPRINTK("EXIT\n");
|
|
}
|
|
|
|
static int 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);
|
|
|
|
if (unlikely(err_mask & AC_ERR_DEV)) {
|
|
cmd->result = SAM_STAT_CHECK_CONDITION;
|
|
atapi_request_sense(qc);
|
|
return 1;
|
|
}
|
|
|
|
else if (unlikely(err_mask))
|
|
/* FIXME: not quite right; we don't want the
|
|
* translation of taskfile registers into
|
|
* a sense descriptors, since that's only
|
|
* correct for ATA, not ATAPI
|
|
*/
|
|
ata_gen_ata_desc_sense(qc);
|
|
|
|
else {
|
|
u8 *scsicmd = cmd->cmnd;
|
|
|
|
if ((scsicmd[0] == INQUIRY) && ((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);
|
|
return 0;
|
|
}
|
|
/**
|
|
* atapi_xlat - Initialize PACKET taskfile
|
|
* @qc: command structure to be initialized
|
|
* @scsicmd: SCSI CDB associated with this PACKET command
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host_set lock)
|
|
*
|
|
* RETURNS:
|
|
* Zero on success, non-zero on failure.
|
|
*/
|
|
|
|
static unsigned int atapi_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
|
|
{
|
|
struct scsi_cmnd *cmd = qc->scsicmd;
|
|
struct ata_device *dev = qc->dev;
|
|
int using_pio = (dev->flags & ATA_DFLAG_PIO);
|
|
int nodata = (cmd->sc_data_direction == DMA_NONE);
|
|
|
|
if (!using_pio)
|
|
/* Check whether ATAPI DMA is safe */
|
|
if (ata_check_atapi_dma(qc))
|
|
using_pio = 1;
|
|
|
|
memcpy(&qc->cdb, scsicmd, qc->ap->cdb_len);
|
|
|
|
qc->complete_fn = atapi_qc_complete;
|
|
|
|
qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
|
|
if (cmd->sc_data_direction == DMA_TO_DEVICE) {
|
|
qc->tf.flags |= ATA_TFLAG_WRITE;
|
|
DPRINTK("direction: write\n");
|
|
}
|
|
|
|
qc->tf.command = ATA_CMD_PACKET;
|
|
|
|
/* no data, or PIO data xfer */
|
|
if (using_pio || nodata) {
|
|
if (nodata)
|
|
qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
|
|
else
|
|
qc->tf.protocol = ATA_PROT_ATAPI;
|
|
qc->tf.lbam = (8 * 1024) & 0xff;
|
|
qc->tf.lbah = (8 * 1024) >> 8;
|
|
}
|
|
|
|
/* DMA data xfer */
|
|
else {
|
|
qc->tf.protocol = ATA_PROT_ATAPI_DMA;
|
|
qc->tf.feature |= ATAPI_PKT_DMA;
|
|
|
|
#ifdef ATAPI_ENABLE_DMADIR
|
|
/* some SATA bridges need us to indicate data xfer direction */
|
|
if (cmd->sc_data_direction != DMA_TO_DEVICE)
|
|
qc->tf.feature |= ATAPI_DMADIR;
|
|
#endif
|
|
}
|
|
|
|
qc->nbytes = cmd->bufflen;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ata_scsi_find_dev - lookup ata_device from scsi_cmnd
|
|
* @ap: ATA port to which the device is attached
|
|
* @scsidev: SCSI device from which we derive the ATA device
|
|
*
|
|
* Given various information provided in struct scsi_cmnd,
|
|
* map that onto an ATA bus, and using that mapping
|
|
* determine which ata_device is associated with the
|
|
* SCSI command to be sent.
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host_set lock)
|
|
*
|
|
* RETURNS:
|
|
* Associated ATA device, or %NULL if not found.
|
|
*/
|
|
|
|
static struct ata_device *
|
|
ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
|
|
{
|
|
struct ata_device *dev;
|
|
|
|
/* skip commands not addressed to targets we simulate */
|
|
if (likely(scsidev->id < ATA_MAX_DEVICES))
|
|
dev = &ap->device[scsidev->id];
|
|
else
|
|
return NULL;
|
|
|
|
if (unlikely((scsidev->channel != 0) ||
|
|
(scsidev->lun != 0)))
|
|
return NULL;
|
|
|
|
if (unlikely(!ata_dev_present(dev)))
|
|
return NULL;
|
|
|
|
if (!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) {
|
|
if (unlikely(dev->class == ATA_DEV_ATAPI)) {
|
|
printk(KERN_WARNING "ata%u(%u): WARNING: ATAPI is %s, device ignored.\n",
|
|
ap->id, dev->devno, 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 */
|
|
if (byte1 & 0xe0) {
|
|
return ATA_PROT_PIO_MULT;
|
|
}
|
|
return ATA_PROT_PIO;
|
|
|
|
case 10: /* Device Reset */
|
|
case 0: /* Hard Reset */
|
|
case 1: /* SRST */
|
|
case 2: /* Bus Idle */
|
|
case 7: /* Packet */
|
|
case 8: /* DMA Queued */
|
|
case 9: /* Device Diagnostic */
|
|
case 11: /* UDMA Data-in */
|
|
case 12: /* UDMA Data-Out */
|
|
case 13: /* FPDMA */
|
|
default: /* Reserved */
|
|
break;
|
|
}
|
|
|
|
return ATA_PROT_UNKNOWN;
|
|
}
|
|
|
|
/**
|
|
* ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
|
|
* @qc: command structure to be initialized
|
|
* @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;
|
|
|
|
if ((tf->protocol = ata_scsi_map_proto(scsicmd[1])) == ATA_PROT_UNKNOWN)
|
|
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;
|
|
|
|
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
|
|
}
|
|
|
|
/**
|
|
* ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
|
|
* @cmd: SCSI command to be sent
|
|
* @done: Completion function, called when command is complete
|
|
*
|
|
* In some cases, this function translates SCSI commands into
|
|
* ATA taskfiles, and queues the taskfiles to be sent to
|
|
* hardware. In other cases, this function simulates a
|
|
* SCSI device by evaluating and responding to certain
|
|
* SCSI commands. This creates the overall effect of
|
|
* ATA and ATAPI devices appearing as SCSI devices.
|
|
*
|
|
* LOCKING:
|
|
* Releases scsi-layer-held lock, and obtains host_set lock.
|
|
*
|
|
* RETURNS:
|
|
* Zero.
|
|
*/
|
|
|
|
int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
|
|
{
|
|
struct ata_port *ap;
|
|
struct ata_device *dev;
|
|
struct scsi_device *scsidev = cmd->device;
|
|
struct Scsi_Host *shost = scsidev->host;
|
|
|
|
ap = (struct ata_port *) &shost->hostdata[0];
|
|
|
|
spin_unlock(shost->host_lock);
|
|
spin_lock(&ap->host_set->lock);
|
|
|
|
ata_scsi_dump_cdb(ap, cmd);
|
|
|
|
dev = ata_scsi_find_dev(ap, scsidev);
|
|
if (unlikely(!dev)) {
|
|
cmd->result = (DID_BAD_TARGET << 16);
|
|
done(cmd);
|
|
goto out_unlock;
|
|
}
|
|
|
|
if (dev->class == ATA_DEV_ATA) {
|
|
ata_xlat_func_t xlat_func = ata_get_xlat_func(dev,
|
|
cmd->cmnd[0]);
|
|
|
|
if (xlat_func)
|
|
ata_scsi_translate(ap, dev, cmd, done, xlat_func);
|
|
else
|
|
ata_scsi_simulate(ap, dev, cmd, done);
|
|
} else
|
|
ata_scsi_translate(ap, dev, cmd, done, atapi_xlat);
|
|
|
|
out_unlock:
|
|
spin_unlock(&ap->host_set->lock);
|
|
spin_lock(shost->host_lock);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ata_scsi_simulate - simulate SCSI command on ATA device
|
|
* @id: current IDENTIFY data for target device.
|
|
* @cmd: SCSI command being sent to device.
|
|
* @done: SCSI command completion function.
|
|
*
|
|
* Interprets and directly executes a select list of SCSI commands
|
|
* that can be handled internally.
|
|
*
|
|
* LOCKING:
|
|
* spin_lock_irqsave(host_set lock)
|
|
*/
|
|
|
|
void ata_scsi_simulate(struct ata_port *ap, struct ata_device *dev,
|
|
struct scsi_cmnd *cmd,
|
|
void (*done)(struct scsi_cmnd *))
|
|
{
|
|
struct ata_scsi_args args;
|
|
const u8 *scsicmd = cmd->cmnd;
|
|
|
|
args.ap = ap;
|
|
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_PORT_DISABLED)
|
|
return;
|
|
|
|
for (i = 0; i < ATA_MAX_DEVICES; i++) {
|
|
dev = &ap->device[i];
|
|
|
|
if (ata_dev_present(dev))
|
|
scsi_scan_target(&ap->host->shost_gendev, 0, i, 0, 0);
|
|
}
|
|
}
|
|
|