1018 lines
24 KiB
C
1018 lines
24 KiB
C
/*
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* SCSI Media Changer device driver for Linux 2.6
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*
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* (c) 1996-2003 Gerd Knorr <kraxel@bytesex.org>
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*
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*/
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#define VERSION "0.25"
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/fs.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <linux/major.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/interrupt.h>
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#include <linux/blkdev.h>
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#include <linux/completion.h>
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#include <linux/ioctl32.h>
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#include <linux/compat.h>
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#include <linux/chio.h> /* here are all the ioctls */
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#include <scsi/scsi.h>
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#include <scsi/scsi_cmnd.h>
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#include <scsi/scsi_driver.h>
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#include <scsi/scsi_ioctl.h>
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_eh.h>
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#include <scsi/scsi_dbg.h>
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#define CH_DT_MAX 16
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#define CH_TYPES 8
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MODULE_DESCRIPTION("device driver for scsi media changer devices");
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MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org>");
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MODULE_LICENSE("GPL");
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static int init = 1;
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module_param(init, int, 0444);
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MODULE_PARM_DESC(init, \
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"initialize element status on driver load (default: on)");
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static int timeout_move = 300;
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module_param(timeout_move, int, 0644);
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MODULE_PARM_DESC(timeout_move,"timeout for move commands "
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"(default: 300 seconds)");
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static int timeout_init = 3600;
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module_param(timeout_init, int, 0644);
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MODULE_PARM_DESC(timeout_init,"timeout for INITIALIZE ELEMENT STATUS "
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"(default: 3600 seconds)");
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static int verbose = 1;
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module_param(verbose, int, 0644);
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MODULE_PARM_DESC(verbose,"be verbose (default: on)");
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static int debug = 0;
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module_param(debug, int, 0644);
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MODULE_PARM_DESC(debug,"enable/disable debug messages, also prints more "
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"detailed sense codes on scsi errors (default: off)");
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static int dt_id[CH_DT_MAX] = { [ 0 ... (CH_DT_MAX-1) ] = -1 };
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static int dt_lun[CH_DT_MAX];
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module_param_array(dt_id, int, NULL, 0444);
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module_param_array(dt_lun, int, NULL, 0444);
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/* tell the driver about vendor-specific slots */
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static int vendor_firsts[CH_TYPES-4];
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static int vendor_counts[CH_TYPES-4];
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module_param_array(vendor_firsts, int, NULL, 0444);
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module_param_array(vendor_counts, int, NULL, 0444);
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static char *vendor_labels[CH_TYPES-4] = {
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"v0", "v1", "v2", "v3"
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};
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// module_param_string_array(vendor_labels, NULL, 0444);
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#define dprintk(fmt, arg...) if (debug) \
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printk(KERN_DEBUG "%s: " fmt, ch->name , ## arg)
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#define vprintk(fmt, arg...) if (verbose) \
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printk(KERN_INFO "%s: " fmt, ch->name , ## arg)
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/* ------------------------------------------------------------------- */
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#define MAX_RETRIES 1
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static int ch_probe(struct device *);
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static int ch_remove(struct device *);
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static int ch_open(struct inode * inode, struct file * filp);
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static int ch_release(struct inode * inode, struct file * filp);
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static int ch_ioctl(struct inode * inode, struct file * filp,
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unsigned int cmd, unsigned long arg);
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#ifdef CONFIG_COMPAT
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static long ch_ioctl_compat(struct file * filp,
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unsigned int cmd, unsigned long arg);
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#endif
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static struct class * ch_sysfs_class;
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typedef struct {
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struct list_head list;
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int minor;
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char name[8];
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struct scsi_device *device;
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struct scsi_device **dt; /* ptrs to data transfer elements */
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u_int firsts[CH_TYPES];
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u_int counts[CH_TYPES];
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u_int unit_attention;
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u_int voltags;
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struct semaphore lock;
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} scsi_changer;
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static LIST_HEAD(ch_devlist);
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static DEFINE_SPINLOCK(ch_devlist_lock);
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static int ch_devcount;
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static struct scsi_driver ch_template =
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{
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.owner = THIS_MODULE,
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.gendrv = {
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.name = "ch",
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.probe = ch_probe,
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.remove = ch_remove,
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},
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};
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static struct file_operations changer_fops =
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{
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.owner = THIS_MODULE,
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.open = ch_open,
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.release = ch_release,
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.ioctl = ch_ioctl,
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#ifdef CONFIG_COMPAT
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.compat_ioctl = ch_ioctl_compat,
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#endif
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};
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static struct {
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unsigned char sense;
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unsigned char asc;
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unsigned char ascq;
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int errno;
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} err[] = {
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/* Just filled in what looks right. Hav'nt checked any standard paper for
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these errno assignments, so they may be wrong... */
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{
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.sense = ILLEGAL_REQUEST,
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.asc = 0x21,
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.ascq = 0x01,
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.errno = EBADSLT, /* Invalid element address */
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},{
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.sense = ILLEGAL_REQUEST,
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.asc = 0x28,
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.ascq = 0x01,
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.errno = EBADE, /* Import or export element accessed */
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},{
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.sense = ILLEGAL_REQUEST,
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.asc = 0x3B,
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.ascq = 0x0D,
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.errno = EXFULL, /* Medium destination element full */
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},{
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.sense = ILLEGAL_REQUEST,
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.asc = 0x3B,
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.ascq = 0x0E,
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.errno = EBADE, /* Medium source element empty */
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},{
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.sense = ILLEGAL_REQUEST,
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.asc = 0x20,
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.ascq = 0x00,
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.errno = EBADRQC, /* Invalid command operation code */
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},{
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/* end of list */
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}
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};
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/* ------------------------------------------------------------------- */
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static int ch_find_errno(struct scsi_sense_hdr *sshdr)
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{
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int i,errno = 0;
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/* Check to see if additional sense information is available */
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if (scsi_sense_valid(sshdr) &&
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sshdr->asc != 0) {
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for (i = 0; err[i].errno != 0; i++) {
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if (err[i].sense == sshdr->sense_key &&
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err[i].asc == sshdr->asc &&
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err[i].ascq == sshdr->ascq) {
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errno = -err[i].errno;
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break;
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}
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}
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}
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if (errno == 0)
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errno = -EIO;
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return errno;
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}
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static int
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ch_do_scsi(scsi_changer *ch, unsigned char *cmd,
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void *buffer, unsigned buflength,
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enum dma_data_direction direction)
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{
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int errno, retries = 0, timeout, result;
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struct scsi_sense_hdr sshdr;
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timeout = (cmd[0] == INITIALIZE_ELEMENT_STATUS)
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? timeout_init : timeout_move;
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retry:
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errno = 0;
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if (debug) {
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dprintk("command: ");
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__scsi_print_command(cmd);
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}
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result = scsi_execute_req(ch->device, cmd, direction, buffer,
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buflength, &sshdr, timeout * HZ,
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MAX_RETRIES);
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dprintk("result: 0x%x\n",result);
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if (driver_byte(result) & DRIVER_SENSE) {
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if (debug)
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scsi_print_sense_hdr(ch->name, &sshdr);
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errno = ch_find_errno(&sshdr);
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switch(sshdr.sense_key) {
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case UNIT_ATTENTION:
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ch->unit_attention = 1;
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if (retries++ < 3)
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goto retry;
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break;
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}
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}
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return errno;
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}
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/* ------------------------------------------------------------------------ */
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static int
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ch_elem_to_typecode(scsi_changer *ch, u_int elem)
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{
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int i;
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for (i = 0; i < CH_TYPES; i++) {
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if (elem >= ch->firsts[i] &&
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elem < ch->firsts[i] +
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ch->counts[i])
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return i+1;
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}
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return 0;
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}
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static int
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ch_read_element_status(scsi_changer *ch, u_int elem, char *data)
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{
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u_char cmd[12];
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u_char *buffer;
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int result;
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buffer = kmalloc(512, GFP_KERNEL | GFP_DMA);
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if(!buffer)
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return -ENOMEM;
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retry:
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memset(cmd,0,sizeof(cmd));
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cmd[0] = READ_ELEMENT_STATUS;
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cmd[1] = (ch->device->lun << 5) |
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(ch->voltags ? 0x10 : 0) |
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ch_elem_to_typecode(ch,elem);
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cmd[2] = (elem >> 8) & 0xff;
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cmd[3] = elem & 0xff;
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cmd[5] = 1;
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cmd[9] = 255;
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if (0 == (result = ch_do_scsi(ch, cmd, buffer, 256, DMA_FROM_DEVICE))) {
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if (((buffer[16] << 8) | buffer[17]) != elem) {
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dprintk("asked for element 0x%02x, got 0x%02x\n",
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elem,(buffer[16] << 8) | buffer[17]);
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kfree(buffer);
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return -EIO;
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}
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memcpy(data,buffer+16,16);
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} else {
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if (ch->voltags) {
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ch->voltags = 0;
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vprintk("device has no volume tag support\n");
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goto retry;
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}
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dprintk("READ ELEMENT STATUS for element 0x%x failed\n",elem);
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}
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kfree(buffer);
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return result;
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}
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static int
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ch_init_elem(scsi_changer *ch)
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{
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int err;
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u_char cmd[6];
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vprintk("INITIALIZE ELEMENT STATUS, may take some time ...\n");
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memset(cmd,0,sizeof(cmd));
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cmd[0] = INITIALIZE_ELEMENT_STATUS;
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cmd[1] = ch->device->lun << 5;
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err = ch_do_scsi(ch, cmd, NULL, 0, DMA_NONE);
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vprintk("... finished\n");
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return err;
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}
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static int
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ch_readconfig(scsi_changer *ch)
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{
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u_char cmd[10], data[16];
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u_char *buffer;
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int result,id,lun,i;
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u_int elem;
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buffer = kmalloc(512, GFP_KERNEL | GFP_DMA);
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if (!buffer)
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return -ENOMEM;
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memset(buffer,0,512);
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memset(cmd,0,sizeof(cmd));
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cmd[0] = MODE_SENSE;
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cmd[1] = ch->device->lun << 5;
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cmd[2] = 0x1d;
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cmd[4] = 255;
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result = ch_do_scsi(ch, cmd, buffer, 255, DMA_FROM_DEVICE);
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if (0 != result) {
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cmd[1] |= (1<<3);
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result = ch_do_scsi(ch, cmd, buffer, 255, DMA_FROM_DEVICE);
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}
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if (0 == result) {
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ch->firsts[CHET_MT] =
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(buffer[buffer[3]+ 6] << 8) | buffer[buffer[3]+ 7];
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ch->counts[CHET_MT] =
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(buffer[buffer[3]+ 8] << 8) | buffer[buffer[3]+ 9];
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ch->firsts[CHET_ST] =
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(buffer[buffer[3]+10] << 8) | buffer[buffer[3]+11];
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ch->counts[CHET_ST] =
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(buffer[buffer[3]+12] << 8) | buffer[buffer[3]+13];
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ch->firsts[CHET_IE] =
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(buffer[buffer[3]+14] << 8) | buffer[buffer[3]+15];
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ch->counts[CHET_IE] =
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(buffer[buffer[3]+16] << 8) | buffer[buffer[3]+17];
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ch->firsts[CHET_DT] =
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(buffer[buffer[3]+18] << 8) | buffer[buffer[3]+19];
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ch->counts[CHET_DT] =
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(buffer[buffer[3]+20] << 8) | buffer[buffer[3]+21];
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vprintk("type #1 (mt): 0x%x+%d [medium transport]\n",
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ch->firsts[CHET_MT],
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ch->counts[CHET_MT]);
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vprintk("type #2 (st): 0x%x+%d [storage]\n",
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ch->firsts[CHET_ST],
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ch->counts[CHET_ST]);
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vprintk("type #3 (ie): 0x%x+%d [import/export]\n",
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ch->firsts[CHET_IE],
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ch->counts[CHET_IE]);
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vprintk("type #4 (dt): 0x%x+%d [data transfer]\n",
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ch->firsts[CHET_DT],
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ch->counts[CHET_DT]);
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} else {
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vprintk("reading element address assigment page failed!\n");
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}
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/* vendor specific element types */
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for (i = 0; i < 4; i++) {
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if (0 == vendor_counts[i])
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continue;
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if (NULL == vendor_labels[i])
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continue;
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ch->firsts[CHET_V1+i] = vendor_firsts[i];
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ch->counts[CHET_V1+i] = vendor_counts[i];
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vprintk("type #%d (v%d): 0x%x+%d [%s, vendor specific]\n",
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i+5,i+1,vendor_firsts[i],vendor_counts[i],
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vendor_labels[i]);
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}
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/* look up the devices of the data transfer elements */
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ch->dt = kmalloc(ch->counts[CHET_DT]*sizeof(struct scsi_device),
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GFP_KERNEL);
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for (elem = 0; elem < ch->counts[CHET_DT]; elem++) {
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id = -1;
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lun = 0;
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if (elem < CH_DT_MAX && -1 != dt_id[elem]) {
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id = dt_id[elem];
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lun = dt_lun[elem];
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vprintk("dt 0x%x: [insmod option] ",
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elem+ch->firsts[CHET_DT]);
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} else if (0 != ch_read_element_status
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(ch,elem+ch->firsts[CHET_DT],data)) {
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vprintk("dt 0x%x: READ ELEMENT STATUS failed\n",
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elem+ch->firsts[CHET_DT]);
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} else {
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vprintk("dt 0x%x: ",elem+ch->firsts[CHET_DT]);
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if (data[6] & 0x80) {
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if (verbose)
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printk("not this SCSI bus\n");
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ch->dt[elem] = NULL;
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} else if (0 == (data[6] & 0x30)) {
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if (verbose)
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printk("ID/LUN unknown\n");
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ch->dt[elem] = NULL;
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} else {
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id = ch->device->id;
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lun = 0;
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if (data[6] & 0x20) id = data[7];
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if (data[6] & 0x10) lun = data[6] & 7;
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}
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}
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if (-1 != id) {
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if (verbose)
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printk("ID %i, LUN %i, ",id,lun);
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ch->dt[elem] =
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scsi_device_lookup(ch->device->host,
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ch->device->channel,
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id,lun);
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if (!ch->dt[elem]) {
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/* should not happen */
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if (verbose)
|
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printk("Huh? device not found!\n");
|
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} else {
|
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if (verbose)
|
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printk("name: %8.8s %16.16s %4.4s\n",
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ch->dt[elem]->vendor,
|
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ch->dt[elem]->model,
|
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ch->dt[elem]->rev);
|
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}
|
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}
|
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}
|
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ch->voltags = 1;
|
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kfree(buffer);
|
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|
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return 0;
|
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}
|
|
|
|
/* ------------------------------------------------------------------------ */
|
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|
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static int
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ch_position(scsi_changer *ch, u_int trans, u_int elem, int rotate)
|
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{
|
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u_char cmd[10];
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dprintk("position: 0x%x\n",elem);
|
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if (0 == trans)
|
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trans = ch->firsts[CHET_MT];
|
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memset(cmd,0,sizeof(cmd));
|
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cmd[0] = POSITION_TO_ELEMENT;
|
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cmd[1] = ch->device->lun << 5;
|
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cmd[2] = (trans >> 8) & 0xff;
|
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cmd[3] = trans & 0xff;
|
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cmd[4] = (elem >> 8) & 0xff;
|
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cmd[5] = elem & 0xff;
|
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cmd[8] = rotate ? 1 : 0;
|
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return ch_do_scsi(ch, cmd, NULL, 0, DMA_NONE);
|
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}
|
|
|
|
static int
|
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ch_move(scsi_changer *ch, u_int trans, u_int src, u_int dest, int rotate)
|
|
{
|
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u_char cmd[12];
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|
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dprintk("move: 0x%x => 0x%x\n",src,dest);
|
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if (0 == trans)
|
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trans = ch->firsts[CHET_MT];
|
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memset(cmd,0,sizeof(cmd));
|
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cmd[0] = MOVE_MEDIUM;
|
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cmd[1] = ch->device->lun << 5;
|
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cmd[2] = (trans >> 8) & 0xff;
|
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cmd[3] = trans & 0xff;
|
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cmd[4] = (src >> 8) & 0xff;
|
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cmd[5] = src & 0xff;
|
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cmd[6] = (dest >> 8) & 0xff;
|
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cmd[7] = dest & 0xff;
|
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cmd[10] = rotate ? 1 : 0;
|
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return ch_do_scsi(ch, cmd, NULL,0, DMA_NONE);
|
|
}
|
|
|
|
static int
|
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ch_exchange(scsi_changer *ch, u_int trans, u_int src,
|
|
u_int dest1, u_int dest2, int rotate1, int rotate2)
|
|
{
|
|
u_char cmd[12];
|
|
|
|
dprintk("exchange: 0x%x => 0x%x => 0x%x\n",
|
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src,dest1,dest2);
|
|
if (0 == trans)
|
|
trans = ch->firsts[CHET_MT];
|
|
memset(cmd,0,sizeof(cmd));
|
|
cmd[0] = EXCHANGE_MEDIUM;
|
|
cmd[1] = ch->device->lun << 5;
|
|
cmd[2] = (trans >> 8) & 0xff;
|
|
cmd[3] = trans & 0xff;
|
|
cmd[4] = (src >> 8) & 0xff;
|
|
cmd[5] = src & 0xff;
|
|
cmd[6] = (dest1 >> 8) & 0xff;
|
|
cmd[7] = dest1 & 0xff;
|
|
cmd[8] = (dest2 >> 8) & 0xff;
|
|
cmd[9] = dest2 & 0xff;
|
|
cmd[10] = (rotate1 ? 1 : 0) | (rotate2 ? 2 : 0);
|
|
|
|
return ch_do_scsi(ch, cmd, NULL,0, DMA_NONE);
|
|
}
|
|
|
|
static void
|
|
ch_check_voltag(char *tag)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < 32; i++) {
|
|
/* restrict to ascii */
|
|
if (tag[i] >= 0x7f || tag[i] < 0x20)
|
|
tag[i] = ' ';
|
|
/* don't allow search wildcards */
|
|
if (tag[i] == '?' ||
|
|
tag[i] == '*')
|
|
tag[i] = ' ';
|
|
}
|
|
}
|
|
|
|
static int
|
|
ch_set_voltag(scsi_changer *ch, u_int elem,
|
|
int alternate, int clear, u_char *tag)
|
|
{
|
|
u_char cmd[12];
|
|
u_char *buffer;
|
|
int result;
|
|
|
|
buffer = kmalloc(512, GFP_KERNEL);
|
|
if (!buffer)
|
|
return -ENOMEM;
|
|
memset(buffer,0,512);
|
|
|
|
dprintk("%s %s voltag: 0x%x => \"%s\"\n",
|
|
clear ? "clear" : "set",
|
|
alternate ? "alternate" : "primary",
|
|
elem, tag);
|
|
memset(cmd,0,sizeof(cmd));
|
|
cmd[0] = SEND_VOLUME_TAG;
|
|
cmd[1] = (ch->device->lun << 5) |
|
|
ch_elem_to_typecode(ch,elem);
|
|
cmd[2] = (elem >> 8) & 0xff;
|
|
cmd[3] = elem & 0xff;
|
|
cmd[5] = clear
|
|
? (alternate ? 0x0d : 0x0c)
|
|
: (alternate ? 0x0b : 0x0a);
|
|
|
|
cmd[9] = 255;
|
|
|
|
memcpy(buffer,tag,32);
|
|
ch_check_voltag(buffer);
|
|
|
|
result = ch_do_scsi(ch, cmd, buffer, 256, DMA_TO_DEVICE);
|
|
kfree(buffer);
|
|
return result;
|
|
}
|
|
|
|
static int ch_gstatus(scsi_changer *ch, int type, unsigned char __user *dest)
|
|
{
|
|
int retval = 0;
|
|
u_char data[16];
|
|
unsigned int i;
|
|
|
|
down(&ch->lock);
|
|
for (i = 0; i < ch->counts[type]; i++) {
|
|
if (0 != ch_read_element_status
|
|
(ch, ch->firsts[type]+i,data)) {
|
|
retval = -EIO;
|
|
break;
|
|
}
|
|
put_user(data[2], dest+i);
|
|
if (data[2] & CESTATUS_EXCEPT)
|
|
vprintk("element 0x%x: asc=0x%x, ascq=0x%x\n",
|
|
ch->firsts[type]+i,
|
|
(int)data[4],(int)data[5]);
|
|
retval = ch_read_element_status
|
|
(ch, ch->firsts[type]+i,data);
|
|
if (0 != retval)
|
|
break;
|
|
}
|
|
up(&ch->lock);
|
|
return retval;
|
|
}
|
|
|
|
/* ------------------------------------------------------------------------ */
|
|
|
|
static int
|
|
ch_release(struct inode *inode, struct file *file)
|
|
{
|
|
scsi_changer *ch = file->private_data;
|
|
|
|
scsi_device_put(ch->device);
|
|
file->private_data = NULL;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
ch_open(struct inode *inode, struct file *file)
|
|
{
|
|
scsi_changer *tmp, *ch;
|
|
int minor = iminor(inode);
|
|
|
|
spin_lock(&ch_devlist_lock);
|
|
ch = NULL;
|
|
list_for_each_entry(tmp,&ch_devlist,list) {
|
|
if (tmp->minor == minor)
|
|
ch = tmp;
|
|
}
|
|
if (NULL == ch || scsi_device_get(ch->device)) {
|
|
spin_unlock(&ch_devlist_lock);
|
|
return -ENXIO;
|
|
}
|
|
spin_unlock(&ch_devlist_lock);
|
|
|
|
file->private_data = ch;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
ch_checkrange(scsi_changer *ch, unsigned int type, unsigned int unit)
|
|
{
|
|
if (type >= CH_TYPES || unit >= ch->counts[type])
|
|
return -1;
|
|
return 0;
|
|
}
|
|
|
|
static int ch_ioctl(struct inode * inode, struct file * file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
scsi_changer *ch = file->private_data;
|
|
int retval;
|
|
void __user *argp = (void __user *)arg;
|
|
|
|
switch (cmd) {
|
|
case CHIOGPARAMS:
|
|
{
|
|
struct changer_params params;
|
|
|
|
params.cp_curpicker = 0;
|
|
params.cp_npickers = ch->counts[CHET_MT];
|
|
params.cp_nslots = ch->counts[CHET_ST];
|
|
params.cp_nportals = ch->counts[CHET_IE];
|
|
params.cp_ndrives = ch->counts[CHET_DT];
|
|
|
|
if (copy_to_user(argp, ¶ms, sizeof(params)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
case CHIOGVPARAMS:
|
|
{
|
|
struct changer_vendor_params vparams;
|
|
|
|
memset(&vparams,0,sizeof(vparams));
|
|
if (ch->counts[CHET_V1]) {
|
|
vparams.cvp_n1 = ch->counts[CHET_V1];
|
|
strncpy(vparams.cvp_label1,vendor_labels[0],16);
|
|
}
|
|
if (ch->counts[CHET_V2]) {
|
|
vparams.cvp_n2 = ch->counts[CHET_V2];
|
|
strncpy(vparams.cvp_label2,vendor_labels[1],16);
|
|
}
|
|
if (ch->counts[CHET_V3]) {
|
|
vparams.cvp_n3 = ch->counts[CHET_V3];
|
|
strncpy(vparams.cvp_label3,vendor_labels[2],16);
|
|
}
|
|
if (ch->counts[CHET_V4]) {
|
|
vparams.cvp_n4 = ch->counts[CHET_V4];
|
|
strncpy(vparams.cvp_label4,vendor_labels[3],16);
|
|
}
|
|
if (copy_to_user(argp, &vparams, sizeof(vparams)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
case CHIOPOSITION:
|
|
{
|
|
struct changer_position pos;
|
|
|
|
if (copy_from_user(&pos, argp, sizeof (pos)))
|
|
return -EFAULT;
|
|
|
|
if (0 != ch_checkrange(ch, pos.cp_type, pos.cp_unit)) {
|
|
dprintk("CHIOPOSITION: invalid parameter\n");
|
|
return -EBADSLT;
|
|
}
|
|
down(&ch->lock);
|
|
retval = ch_position(ch,0,
|
|
ch->firsts[pos.cp_type] + pos.cp_unit,
|
|
pos.cp_flags & CP_INVERT);
|
|
up(&ch->lock);
|
|
return retval;
|
|
}
|
|
|
|
case CHIOMOVE:
|
|
{
|
|
struct changer_move mv;
|
|
|
|
if (copy_from_user(&mv, argp, sizeof (mv)))
|
|
return -EFAULT;
|
|
|
|
if (0 != ch_checkrange(ch, mv.cm_fromtype, mv.cm_fromunit) ||
|
|
0 != ch_checkrange(ch, mv.cm_totype, mv.cm_tounit )) {
|
|
dprintk("CHIOMOVE: invalid parameter\n");
|
|
return -EBADSLT;
|
|
}
|
|
|
|
down(&ch->lock);
|
|
retval = ch_move(ch,0,
|
|
ch->firsts[mv.cm_fromtype] + mv.cm_fromunit,
|
|
ch->firsts[mv.cm_totype] + mv.cm_tounit,
|
|
mv.cm_flags & CM_INVERT);
|
|
up(&ch->lock);
|
|
return retval;
|
|
}
|
|
|
|
case CHIOEXCHANGE:
|
|
{
|
|
struct changer_exchange mv;
|
|
|
|
if (copy_from_user(&mv, argp, sizeof (mv)))
|
|
return -EFAULT;
|
|
|
|
if (0 != ch_checkrange(ch, mv.ce_srctype, mv.ce_srcunit ) ||
|
|
0 != ch_checkrange(ch, mv.ce_fdsttype, mv.ce_fdstunit) ||
|
|
0 != ch_checkrange(ch, mv.ce_sdsttype, mv.ce_sdstunit)) {
|
|
dprintk("CHIOEXCHANGE: invalid parameter\n");
|
|
return -EBADSLT;
|
|
}
|
|
|
|
down(&ch->lock);
|
|
retval = ch_exchange
|
|
(ch,0,
|
|
ch->firsts[mv.ce_srctype] + mv.ce_srcunit,
|
|
ch->firsts[mv.ce_fdsttype] + mv.ce_fdstunit,
|
|
ch->firsts[mv.ce_sdsttype] + mv.ce_sdstunit,
|
|
mv.ce_flags & CE_INVERT1, mv.ce_flags & CE_INVERT2);
|
|
up(&ch->lock);
|
|
return retval;
|
|
}
|
|
|
|
case CHIOGSTATUS:
|
|
{
|
|
struct changer_element_status ces;
|
|
|
|
if (copy_from_user(&ces, argp, sizeof (ces)))
|
|
return -EFAULT;
|
|
if (ces.ces_type < 0 || ces.ces_type >= CH_TYPES)
|
|
return -EINVAL;
|
|
|
|
return ch_gstatus(ch, ces.ces_type, ces.ces_data);
|
|
}
|
|
|
|
case CHIOGELEM:
|
|
{
|
|
struct changer_get_element cge;
|
|
u_char cmd[12];
|
|
u_char *buffer;
|
|
unsigned int elem;
|
|
int result,i;
|
|
|
|
if (copy_from_user(&cge, argp, sizeof (cge)))
|
|
return -EFAULT;
|
|
|
|
if (0 != ch_checkrange(ch, cge.cge_type, cge.cge_unit))
|
|
return -EINVAL;
|
|
elem = ch->firsts[cge.cge_type] + cge.cge_unit;
|
|
|
|
buffer = kmalloc(512, GFP_KERNEL | GFP_DMA);
|
|
if (!buffer)
|
|
return -ENOMEM;
|
|
down(&ch->lock);
|
|
|
|
voltag_retry:
|
|
memset(cmd,0,sizeof(cmd));
|
|
cmd[0] = READ_ELEMENT_STATUS;
|
|
cmd[1] = (ch->device->lun << 5) |
|
|
(ch->voltags ? 0x10 : 0) |
|
|
ch_elem_to_typecode(ch,elem);
|
|
cmd[2] = (elem >> 8) & 0xff;
|
|
cmd[3] = elem & 0xff;
|
|
cmd[5] = 1;
|
|
cmd[9] = 255;
|
|
|
|
if (0 == (result = ch_do_scsi(ch, cmd, buffer, 256, DMA_FROM_DEVICE))) {
|
|
cge.cge_status = buffer[18];
|
|
cge.cge_flags = 0;
|
|
if (buffer[18] & CESTATUS_EXCEPT) {
|
|
cge.cge_errno = EIO;
|
|
}
|
|
if (buffer[25] & 0x80) {
|
|
cge.cge_flags |= CGE_SRC;
|
|
if (buffer[25] & 0x40)
|
|
cge.cge_flags |= CGE_INVERT;
|
|
elem = (buffer[26]<<8) | buffer[27];
|
|
for (i = 0; i < 4; i++) {
|
|
if (elem >= ch->firsts[i] &&
|
|
elem < ch->firsts[i] + ch->counts[i]) {
|
|
cge.cge_srctype = i;
|
|
cge.cge_srcunit = elem-ch->firsts[i];
|
|
}
|
|
}
|
|
}
|
|
if ((buffer[22] & 0x30) == 0x30) {
|
|
cge.cge_flags |= CGE_IDLUN;
|
|
cge.cge_id = buffer[23];
|
|
cge.cge_lun = buffer[22] & 7;
|
|
}
|
|
if (buffer[9] & 0x80) {
|
|
cge.cge_flags |= CGE_PVOLTAG;
|
|
memcpy(cge.cge_pvoltag,buffer+28,36);
|
|
}
|
|
if (buffer[9] & 0x40) {
|
|
cge.cge_flags |= CGE_AVOLTAG;
|
|
memcpy(cge.cge_avoltag,buffer+64,36);
|
|
}
|
|
} else if (ch->voltags) {
|
|
ch->voltags = 0;
|
|
vprintk("device has no volume tag support\n");
|
|
goto voltag_retry;
|
|
}
|
|
kfree(buffer);
|
|
up(&ch->lock);
|
|
|
|
if (copy_to_user(argp, &cge, sizeof (cge)))
|
|
return -EFAULT;
|
|
return result;
|
|
}
|
|
|
|
case CHIOINITELEM:
|
|
{
|
|
down(&ch->lock);
|
|
retval = ch_init_elem(ch);
|
|
up(&ch->lock);
|
|
return retval;
|
|
}
|
|
|
|
case CHIOSVOLTAG:
|
|
{
|
|
struct changer_set_voltag csv;
|
|
int elem;
|
|
|
|
if (copy_from_user(&csv, argp, sizeof(csv)))
|
|
return -EFAULT;
|
|
|
|
if (0 != ch_checkrange(ch, csv.csv_type, csv.csv_unit)) {
|
|
dprintk("CHIOSVOLTAG: invalid parameter\n");
|
|
return -EBADSLT;
|
|
}
|
|
elem = ch->firsts[csv.csv_type] + csv.csv_unit;
|
|
down(&ch->lock);
|
|
retval = ch_set_voltag(ch, elem,
|
|
csv.csv_flags & CSV_AVOLTAG,
|
|
csv.csv_flags & CSV_CLEARTAG,
|
|
csv.csv_voltag);
|
|
up(&ch->lock);
|
|
return retval;
|
|
}
|
|
|
|
default:
|
|
return scsi_ioctl(ch->device, cmd, argp);
|
|
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
|
|
struct changer_element_status32 {
|
|
int ces_type;
|
|
compat_uptr_t ces_data;
|
|
};
|
|
#define CHIOGSTATUS32 _IOW('c', 8,struct changer_element_status32)
|
|
|
|
static long ch_ioctl_compat(struct file * file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
scsi_changer *ch = file->private_data;
|
|
|
|
switch (cmd) {
|
|
case CHIOGPARAMS:
|
|
case CHIOGVPARAMS:
|
|
case CHIOPOSITION:
|
|
case CHIOMOVE:
|
|
case CHIOEXCHANGE:
|
|
case CHIOGELEM:
|
|
case CHIOINITELEM:
|
|
case CHIOSVOLTAG:
|
|
/* compatible */
|
|
return ch_ioctl(NULL /* inode, unused */,
|
|
file, cmd, arg);
|
|
case CHIOGSTATUS32:
|
|
{
|
|
struct changer_element_status32 ces32;
|
|
unsigned char __user *data;
|
|
|
|
if (copy_from_user(&ces32, (void __user *)arg, sizeof (ces32)))
|
|
return -EFAULT;
|
|
if (ces32.ces_type < 0 || ces32.ces_type >= CH_TYPES)
|
|
return -EINVAL;
|
|
|
|
data = compat_ptr(ces32.ces_data);
|
|
return ch_gstatus(ch, ces32.ces_type, data);
|
|
}
|
|
default:
|
|
// return scsi_ioctl_compat(ch->device, cmd, (void*)arg);
|
|
return -ENOIOCTLCMD;
|
|
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* ------------------------------------------------------------------------ */
|
|
|
|
static int ch_probe(struct device *dev)
|
|
{
|
|
struct scsi_device *sd = to_scsi_device(dev);
|
|
scsi_changer *ch;
|
|
|
|
if (sd->type != TYPE_MEDIUM_CHANGER)
|
|
return -ENODEV;
|
|
|
|
ch = kmalloc(sizeof(*ch), GFP_KERNEL);
|
|
if (NULL == ch)
|
|
return -ENOMEM;
|
|
|
|
memset(ch,0,sizeof(*ch));
|
|
ch->minor = ch_devcount;
|
|
sprintf(ch->name,"ch%d",ch->minor);
|
|
init_MUTEX(&ch->lock);
|
|
ch->device = sd;
|
|
ch_readconfig(ch);
|
|
if (init)
|
|
ch_init_elem(ch);
|
|
|
|
class_device_create(ch_sysfs_class,
|
|
MKDEV(SCSI_CHANGER_MAJOR,ch->minor),
|
|
dev, "s%s", ch->name);
|
|
|
|
sdev_printk(KERN_INFO, sd, "Attached scsi changer %s\n", ch->name);
|
|
|
|
spin_lock(&ch_devlist_lock);
|
|
list_add_tail(&ch->list,&ch_devlist);
|
|
ch_devcount++;
|
|
spin_unlock(&ch_devlist_lock);
|
|
return 0;
|
|
}
|
|
|
|
static int ch_remove(struct device *dev)
|
|
{
|
|
struct scsi_device *sd = to_scsi_device(dev);
|
|
scsi_changer *tmp, *ch;
|
|
|
|
spin_lock(&ch_devlist_lock);
|
|
ch = NULL;
|
|
list_for_each_entry(tmp,&ch_devlist,list) {
|
|
if (tmp->device == sd)
|
|
ch = tmp;
|
|
}
|
|
BUG_ON(NULL == ch);
|
|
list_del(&ch->list);
|
|
spin_unlock(&ch_devlist_lock);
|
|
|
|
class_device_destroy(ch_sysfs_class,
|
|
MKDEV(SCSI_CHANGER_MAJOR,ch->minor));
|
|
kfree(ch->dt);
|
|
kfree(ch);
|
|
ch_devcount--;
|
|
return 0;
|
|
}
|
|
|
|
static int __init init_ch_module(void)
|
|
{
|
|
int rc;
|
|
|
|
printk(KERN_INFO "SCSI Media Changer driver v" VERSION " \n");
|
|
ch_sysfs_class = class_create(THIS_MODULE, "scsi_changer");
|
|
if (IS_ERR(ch_sysfs_class)) {
|
|
rc = PTR_ERR(ch_sysfs_class);
|
|
return rc;
|
|
}
|
|
rc = register_chrdev(SCSI_CHANGER_MAJOR,"ch",&changer_fops);
|
|
if (rc < 0) {
|
|
printk("Unable to get major %d for SCSI-Changer\n",
|
|
SCSI_CHANGER_MAJOR);
|
|
goto fail1;
|
|
}
|
|
rc = scsi_register_driver(&ch_template.gendrv);
|
|
if (rc < 0)
|
|
goto fail2;
|
|
return 0;
|
|
|
|
fail2:
|
|
unregister_chrdev(SCSI_CHANGER_MAJOR, "ch");
|
|
fail1:
|
|
class_destroy(ch_sysfs_class);
|
|
return rc;
|
|
}
|
|
|
|
static void __exit exit_ch_module(void)
|
|
{
|
|
scsi_unregister_driver(&ch_template.gendrv);
|
|
unregister_chrdev(SCSI_CHANGER_MAJOR, "ch");
|
|
class_destroy(ch_sysfs_class);
|
|
}
|
|
|
|
module_init(init_ch_module);
|
|
module_exit(exit_ch_module);
|
|
|
|
/*
|
|
* Local variables:
|
|
* c-basic-offset: 8
|
|
* End:
|
|
*/
|