source: mainline/uspace/drv/bus/usb/usbmast/scsi_ms.c@ 48ae3ef

/*
 * Copyright (c) 2011 Vojtech Horky
 * Copyright (c) 2011 Jiri Svoboda
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup drvusbmast
 * @{
 */
/**
 * @file
 * SCSI functions for USB mass storage driver.
 */
#include <bitops.h>
#include <byteorder.h>
#include <inttypes.h>
#include <macros.h>
#include <usb/dev/driver.h>
#include <usb/debug.h>
#include <errno.h>
#include <str_error.h>
#include <str.h>
#include <scsi/sbc.h>
#include <scsi/spc.h>
#include "cmdw.h"
#include "bo_trans.h"
#include "scsi_ms.h"
#include "usbmast.h"

/** Get string representation for SCSI peripheral device type.
 *
 * @param type          SCSI peripheral device type code.
 * @return              String representation.
 */
const char *usbmast_scsi_dev_type_str(unsigned type)
{
        return scsi_get_dev_type_str(type);
}

static void usbmast_dump_sense(scsi_sense_data_t *sense_buf)
{
        unsigned sense_key;

        sense_key = sense_buf->flags_key & 0x0f;
        printf("Got sense data. Sense key: 0x%x (%s), ASC 0x%02x, "
            "ASCQ 0x%02x.\n", sense_key,
            scsi_get_sense_key_str(sense_key),
            sense_buf->additional_code,
            sense_buf->additional_cqual);
}

/** Run SCSI command.
 *
 * Run command and repeat in case of unit attention.
 * XXX This is too simplified.
 */
static int usbmast_run_cmd(usbmast_fun_t *mfun, scsi_cmd_t *cmd)
{
        uint8_t sense_key;
        scsi_sense_data_t sense_buf;
        int rc;

        do {
                rc = usb_massstor_cmd(mfun, 0xDEADBEEF, cmd);
                if (rc != EOK) {
                        usb_log_error("Inquiry transport failed, device %s: %s.\n",
                           mfun->mdev->ddf_dev->name, str_error(rc));
                        return rc;
                }

                if (cmd->status == CMDS_GOOD)
                        return EOK;

                usb_log_error("SCSI command failed, device %s.\n",
                    mfun->mdev->ddf_dev->name);

                rc = usbmast_request_sense(mfun, &sense_buf, sizeof(sense_buf));
                if (rc != EOK) {
                        usb_log_error("Failed to read sense data.\n");
                        return EIO;
                }

                /* Dump sense data to log */
                usbmast_dump_sense(&sense_buf);

                /* Get sense key */
                sense_key = sense_buf.flags_key & 0x0f;

                if (sense_key == SCSI_SK_UNIT_ATTENTION) {
                        printf("Got unit attention. Re-trying command.\n");
                }

        } while (sense_key == SCSI_SK_UNIT_ATTENTION);

        /* Command status is not good, nevertheless transport succeeded. */
        return EOK;
}

/** Perform SCSI Inquiry command on USB mass storage device.
 *
 * @param mfun          Mass storage function
 * @param inquiry_result Where to store parsed inquiry result
 * @return              Error code
 */
int usbmast_inquiry(usbmast_fun_t *mfun, usbmast_inquiry_data_t *inq_res)
{
        scsi_std_inquiry_data_t inq_data;
        scsi_cmd_t cmd;
        scsi_cdb_inquiry_t cdb;
        int rc;

        memset(&cdb, 0, sizeof(cdb));
        cdb.op_code = SCSI_CMD_INQUIRY;
        cdb.alloc_len = host2uint16_t_be(sizeof(inq_data));

        memset(&cmd, 0, sizeof(cmd));
        cmd.cdb = &cdb;
        cmd.cdb_size = sizeof(cdb);
        cmd.data_in = &inq_data;
        cmd.data_in_size = sizeof(inq_data);

        rc = usb_massstor_cmd(mfun, 0xDEADBEEF, &cmd);

        if (rc != EOK) {
                usb_log_error("Inquiry transport failed, device %s: %s.\n",
                   mfun->mdev->ddf_dev->name, str_error(rc));
                return rc;
        }

        if (cmd.status != CMDS_GOOD) {
                usb_log_error("Inquiry command failed, device %s.\n",
                   mfun->mdev->ddf_dev->name);
                return EIO;
        }

        if (cmd.rcvd_size < SCSI_STD_INQUIRY_DATA_MIN_SIZE) {
                usb_log_error("SCSI Inquiry response too short (%zu).\n",
                    cmd.rcvd_size);
                return EIO;
        }

        /*
         * Parse inquiry data and fill in the result structure.
         */

        bzero(inq_res, sizeof(*inq_res));

        inq_res->device_type = BIT_RANGE_EXTRACT(uint8_t,
            inq_data.pqual_devtype, SCSI_PQDT_DEV_TYPE_h, SCSI_PQDT_DEV_TYPE_l);

        inq_res->removable = BIT_RANGE_EXTRACT(uint8_t,
            inq_data.rmb, SCSI_RMB_RMB, SCSI_RMB_RMB);

        spascii_to_str(inq_res->vendor, SCSI_INQ_VENDOR_STR_BUFSIZE,
            inq_data.vendor, sizeof(inq_data.vendor));

        spascii_to_str(inq_res->product, SCSI_INQ_PRODUCT_STR_BUFSIZE,
            inq_data.product, sizeof(inq_data.product));

        spascii_to_str(inq_res->revision, SCSI_INQ_REVISION_STR_BUFSIZE,
            inq_data.revision, sizeof(inq_data.revision));

        return EOK;
}

/** Perform SCSI Request Sense command on USB mass storage device.
 *
 * @param mfun          Mass storage function
 * @param buf           Destination buffer
 * @param size          Size of @a buf
 *
 * @return              Error code.
 */
int usbmast_request_sense(usbmast_fun_t *mfun, void *buf, size_t size)
{
        scsi_cmd_t cmd;
        scsi_cdb_request_sense_t cdb;
        int rc;

        memset(&cdb, 0, sizeof(cdb));
        cdb.op_code = SCSI_CMD_REQUEST_SENSE;
        cdb.alloc_len = min(size, SCSI_SENSE_DATA_MAX_SIZE);

        memset(&cmd, 0, sizeof(cmd));
        cmd.cdb = &cdb;
        cmd.cdb_size = sizeof(cdb);
        cmd.data_in = buf;
        cmd.data_in_size = size;

        rc = usb_massstor_cmd(mfun, 0xDEADBEEF, &cmd);

        if (rc != EOK || cmd.status != CMDS_GOOD) {
                usb_log_error("Request Sense failed, device %s: %s.\n",
                   mfun->mdev->ddf_dev->name, str_error(rc));
                return rc;
        }

        if (cmd.rcvd_size < SCSI_SENSE_DATA_MIN_SIZE) {
                /* The missing bytes should be considered to be zeroes. */
                memset((uint8_t *)buf + cmd.rcvd_size, 0,
                    SCSI_SENSE_DATA_MIN_SIZE - cmd.rcvd_size);
        }

        return EOK;
}

/** Perform SCSI Read Capacity command on USB mass storage device.
 *
 * @param mfun          Mass storage function
 * @param nblocks       Output, number of blocks
 * @param block_size    Output, block size in bytes
 *
 * @return              Error code.
 */
int usbmast_read_capacity(usbmast_fun_t *mfun, uint32_t *nblocks,
    uint32_t *block_size)
{
        scsi_cmd_t cmd;
        scsi_cdb_read_capacity_10_t cdb;
        scsi_read_capacity_10_data_t data;
        int rc;

        memset(&cdb, 0, sizeof(cdb));
        cdb.op_code = SCSI_CMD_READ_CAPACITY_10;

        memset(&cmd, 0, sizeof(cmd));
        cmd.cdb = &cdb;
        cmd.cdb_size = sizeof(cdb);
        cmd.data_in = &data;
        cmd.data_in_size = sizeof(data);

        rc = usbmast_run_cmd(mfun, &cmd);

        if (rc != EOK) {
                usb_log_error("Read Capacity (10) transport failed, device %s: %s.\n",
                   mfun->mdev->ddf_dev->name, str_error(rc));
                return rc;
        }

        if (cmd.status != CMDS_GOOD) {
                usb_log_error("Read Capacity (10) command failed, device %s.\n",
                   mfun->mdev->ddf_dev->name);
                return EIO;
        }

        if (cmd.rcvd_size < sizeof(data)) {
                usb_log_error("SCSI Read Capacity response too short (%zu).\n",
                    cmd.rcvd_size);
                return EIO;
        }

        *nblocks = uint32_t_be2host(data.last_lba) + 1;
        *block_size = uint32_t_be2host(data.block_size);

        return EOK;
}

/** Perform SCSI Read command on USB mass storage device.
 *
 * @param mfun          Mass storage function
 * @param ba            Address of first block
 * @param nblocks       Number of blocks to read
 *
 * @return              Error code
 */
int usbmast_read(usbmast_fun_t *mfun, uint64_t ba, size_t nblocks, void *buf)
{
        scsi_cmd_t cmd;
        scsi_cdb_read_10_t cdb;
        int rc;

        if (ba > UINT32_MAX)
                return ELIMIT;

        if (nblocks > UINT16_MAX)
                return ELIMIT;

        memset(&cdb, 0, sizeof(cdb));
        cdb.op_code = SCSI_CMD_READ_10;
        cdb.lba = host2uint32_t_be(ba);
        cdb.xfer_len = host2uint16_t_be(nblocks);

        memset(&cmd, 0, sizeof(cmd));
        cmd.cdb = &cdb;
        cmd.cdb_size = sizeof(cdb);
        cmd.data_in = buf;
        cmd.data_in_size = nblocks * mfun->block_size;

        rc = usbmast_run_cmd(mfun, &cmd);

        if (rc != EOK) {
                usb_log_error("Read (10) transport failed, device %s: %s.\n",
                   mfun->mdev->ddf_dev->name, str_error(rc));
                return rc;
        }

        if (cmd.status != CMDS_GOOD) {
                usb_log_error("Read (10) command failed, device %s.\n",
                   mfun->mdev->ddf_dev->name);
                return EIO;
        }

        if (cmd.rcvd_size < nblocks * mfun->block_size) {
                usb_log_error("SCSI Read response too short (%zu).\n",
                    cmd.rcvd_size);
                return EIO;
        }

        return EOK;
}

/** Perform SCSI Write command on USB mass storage device.
 *
 * @param mfun          Mass storage function
 * @param ba            Address of first block
 * @param nblocks       Number of blocks to read
 * @param data          Data to write
 *
 * @return              Error code
 */
int usbmast_write(usbmast_fun_t *mfun, uint64_t ba, size_t nblocks,
    const void *data)
{
        scsi_cmd_t cmd;
        scsi_cdb_write_10_t cdb;
        int rc;

        if (ba > UINT32_MAX)
                return ELIMIT;

        if (nblocks > UINT16_MAX)
                return ELIMIT;

        memset(&cdb, 0, sizeof(cdb));
        cdb.op_code = SCSI_CMD_WRITE_10;
        cdb.lba = host2uint32_t_be(ba);
        cdb.xfer_len = host2uint16_t_be(nblocks);

        memset(&cmd, 0, sizeof(cmd));
        cmd.cdb = &cdb;
        cmd.cdb_size = sizeof(cdb);
        cmd.data_out = data;
        cmd.data_out_size = nblocks * mfun->block_size;

        rc = usbmast_run_cmd(mfun, &cmd);

        if (rc != EOK) {
                usb_log_error("Write (10) transport failed, device %s: %s.\n",
                   mfun->mdev->ddf_dev->name, str_error(rc));
                return rc;
        }

        if (cmd.status != CMDS_GOOD) {
                usb_log_error("Write (10) command failed, device %s.\n",
                   mfun->mdev->ddf_dev->name);
                return EIO;
        }

        return EOK;
}

/**
 * @}
 */