xref: /dragonfly/usr.sbin/mlxcontrol/interface.c (revision 4842621b77994e080c8c776db4dbc3b02a7e9bc2)

/*-
 * Copyright (c) 1999 Michael Smith
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
 *
 *        $FreeBSD: src/usr.sbin/mlxcontrol/interface.c,v 1.3 2008/09/12 17:40:17 sepotvin Exp $
 */

#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <bus/cam/scsi/scsi_all.h>

#include <dev/raid/mlx/mlxio.h>
#include <dev/raid/mlx/mlxreg.h>

#include "mlxcontrol.h"

/********************************************************************************
 * Iterate over all mlx devices, call (func) with each ones' path and (arg)
 */
void
mlx_foreach(void (*func)(int unit, void *arg), void *arg)
{
    int             i, fd;

    /* limit total count for sanity */
    for (i = 0; i < 64; i++) {
          /* verify we can open it */
          if ((fd = open(ctrlrpath(i), 0)) >= 0)
              close(fd);
          /* if we can, do */
          if (fd >= 0) {
              func(i, arg);
          }
    }
}

/********************************************************************************
 * Open the controller (unit) and give the fd to (func) along with (arg)
 */
void
mlx_perform(int unit, void (*func)(int fd, void *arg), void *arg)
{
    int             fd;

    if ((fd = open(ctrlrpath(unit), 0)) >= 0) {
          func(fd, arg);
          close(fd);
    }
}

/********************************************************************************
 * Iterate over all mlxd devices, call (func) with each ones' path and (arg)
 */
void
mlxd_foreach_ctrlr(int unit, void *arg)
{
    struct mlxd_foreach_action          *ma = (struct mlxd_foreach_action *)arg;
    int                                 i, fd, ctrlfd;

    /* Get the device */
    if ((ctrlfd = open(ctrlrpath(unit), 0)) < 0)
          return;

    for (i = -1; ;) {
          /* Get the unit number of the next child device */
          if (ioctl(ctrlfd, MLX_NEXT_CHILD, &i) < 0) {
              close(ctrlfd);
              return;
          }

          /* check that we can open this unit */
          if ((fd = open(drivepath(i), 0)) >= 0)
              close(fd);
          /* if we can, do */
          if (fd >= 0) {
              ma->func(i, ma->arg);
          }
    }
}

void
mlxd_foreach(void (*func)(int unit, void *arg), void *arg)
{
    struct mlxd_foreach_action ma;

    ma.func = func;
    ma.arg = arg;
    mlx_foreach(mlxd_foreach_ctrlr, &ma);
}

/********************************************************************************
 * Find the controller that manages the drive (unit), return controller number
 * and system drive number on that controller.
 */
static struct
{
    int             unit;
    int             ctrlr;
    int             sysdrive;
} mlxd_find_ctrlr_param;

static void
mlxd_find_ctrlr_search(int unit, void *arg __unused)
{
    int                                 i, fd;

    /* Get the device */
    if ((fd = open(ctrlrpath(unit), 0)) >= 0) {
          for (i = -1; ;) {
              /* Get the unit number of the next child device */
              if (ioctl(fd, MLX_NEXT_CHILD, &i) < 0)
                    break;

              /* is this child the unit we want? */
              if (i == mlxd_find_ctrlr_param.unit) {
                    mlxd_find_ctrlr_param.ctrlr = unit;
                    if (ioctl(fd, MLX_GET_SYSDRIVE, &i) == 0)
                        mlxd_find_ctrlr_param.sysdrive = i;
              }
          }
          close(fd);
    }
}

int
mlxd_find_ctrlr(int unit, int *ctrlr, int *sysdrive)
{
    mlxd_find_ctrlr_param.unit = unit;
    mlxd_find_ctrlr_param.ctrlr = -1;
    mlxd_find_ctrlr_param.sysdrive = -1;

    mlx_foreach(mlxd_find_ctrlr_search, NULL);
    if ((mlxd_find_ctrlr_param.ctrlr != -1) && (mlxd_find_ctrlr_param.sysdrive != -1)) {
          *ctrlr = mlxd_find_ctrlr_param.ctrlr;
          *sysdrive = mlxd_find_ctrlr_param.sysdrive;
          return(0);
    }
    return(1);
}


/********************************************************************************
 * Send a command to the controller on (fd)
 */

void
mlx_command(int fd, void *arg)
{
    struct mlx_usercommand    *cmd = (struct mlx_usercommand *)arg;
    int                                 error;

    error = ioctl(fd, MLX_COMMAND, cmd);
    if (error != 0)
          cmd->mu_error = error;
}

/********************************************************************************
 * Perform an ENQUIRY2 command and return information related to the controller
 * (unit)
 */
int
mlx_enquiry(int unit, struct mlx_enquiry2 *enq)
{
    struct mlx_usercommand    cmd;

    /* build the command */
    cmd.mu_datasize = sizeof(*enq);
    cmd.mu_buf = enq;
    cmd.mu_bufptr = 8;
    cmd.mu_command[0] = MLX_CMD_ENQUIRY2;

    /* hand it off for processing */
    mlx_perform(unit, mlx_command, &cmd);

    return(cmd.mu_status != 0);
}


/********************************************************************************
 * Perform a READ CONFIGURATION command and return information related to the controller
 * (unit)
 */
int
mlx_read_configuration(int unit, struct mlx_core_cfg *cfg)
{
    struct mlx_usercommand    cmd;

    /* build the command */
    cmd.mu_datasize = sizeof(*cfg);
    cmd.mu_buf = cfg;
    cmd.mu_bufptr = 8;
    cmd.mu_command[0] = MLX_CMD_READ_CONFIG;

    /* hand it off for processing */
    mlx_perform(unit, mlx_command, &cmd);

    return(cmd.mu_status != 0);
}

/********************************************************************************
 * Perform a SCSI INQUIRY command and return pointers to the relevant data.
 */
int
mlx_scsi_inquiry(int unit, int channel, int target, char **vendor, char **device, char **revision)
{
    struct mlx_usercommand    cmd;
    static struct {
              struct mlx_dcdb           dcdb;
              union {
                    struct scsi_inquiry_data      inq;
                    u_int8_t                      pad[SHORT_INQUIRY_LENGTH];
              } d;
    } __attribute__ ((packed))                    dcdb_cmd;
    struct scsi_inquiry                 *inq_cmd = (struct scsi_inquiry *)&dcdb_cmd.dcdb.dcdb_cdb[0];

    /* build the command */
    cmd.mu_datasize = sizeof(dcdb_cmd);
    cmd.mu_buf = &dcdb_cmd;
    cmd.mu_command[0] = MLX_CMD_DIRECT_CDB;

    /* build the DCDB */
    bzero(&dcdb_cmd, sizeof(dcdb_cmd));
    dcdb_cmd.dcdb.dcdb_channel = channel;
    dcdb_cmd.dcdb.dcdb_target = target;
    dcdb_cmd.dcdb.dcdb_flags = MLX_DCDB_DATA_IN | MLX_DCDB_TIMEOUT_10S;
    dcdb_cmd.dcdb.dcdb_datasize = SHORT_INQUIRY_LENGTH;
    dcdb_cmd.dcdb.dcdb_cdb_length = 6;
    dcdb_cmd.dcdb.dcdb_sense_length = SSD_FULL_SIZE;

    /* build the cdb */
    inq_cmd->opcode = INQUIRY;
    inq_cmd->length = SHORT_INQUIRY_LENGTH;

    /* hand it off for processing */
    mlx_perform(unit, mlx_command, &cmd);

    if (cmd.mu_status == 0) {
          *vendor = &dcdb_cmd.d.inq.vendor[0];
          *device = &dcdb_cmd.d.inq.product[0];
          *revision = &dcdb_cmd.d.inq.revision[0];
    }
    return(cmd.mu_status);
}

/********************************************************************************
 * Perform a GET DEVICE STATE command and return pointers to the relevant data.
 */
int
mlx_get_device_state(int unit, int channel, int target, struct mlx_phys_drv *drv)
{
    struct mlx_usercommand    cmd;

    /* build the command */
    cmd.mu_datasize = sizeof(*drv);
    cmd.mu_buf = drv;
    cmd.mu_bufptr = 8;
    cmd.mu_command[0] = MLX_CMD_DEVICE_STATE;
    cmd.mu_command[2] = channel;
    cmd.mu_command[3] = target;

    /* hand it off for processing */
    mlx_perform(unit, mlx_command, &cmd);

    return(cmd.mu_status != 0);
}