diff options
Diffstat (limited to 'drivers/scsi/sr_ioctl.c')
| -rw-r--r-- | drivers/scsi/sr_ioctl.c | 568 |
1 files changed, 568 insertions, 0 deletions
diff --git a/drivers/scsi/sr_ioctl.c b/drivers/scsi/sr_ioctl.c new file mode 100644 index 000000000000..3471be05779a --- /dev/null +++ b/drivers/scsi/sr_ioctl.c @@ -0,0 +1,568 @@ +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/mm.h> +#include <linux/fs.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/blkdev.h> +#include <linux/blkpg.h> +#include <linux/cdrom.h> +#include <linux/delay.h> +#include <asm/io.h> +#include <asm/uaccess.h> + +#include <scsi/scsi.h> +#include <scsi/scsi_dbg.h> +#include <scsi/scsi_device.h> +#include <scsi/scsi_eh.h> +#include <scsi/scsi_host.h> +#include <scsi/scsi_ioctl.h> +#include <scsi/scsi_request.h> + +#include "sr.h" + +#if 0 +#define DEBUG +#endif + +/* The sr_is_xa() seems to trigger firmware bugs with some drives :-( + * It is off by default and can be turned on with this module parameter */ +static int xa_test = 0; + +module_param(xa_test, int, S_IRUGO | S_IWUSR); + + +#define IOCTL_RETRIES 3 + +/* ATAPI drives don't have a SCMD_PLAYAUDIO_TI command. When these drives + are emulating a SCSI device via the idescsi module, they need to have + CDROMPLAYTRKIND commands translated into CDROMPLAYMSF commands for them */ + +static int sr_fake_playtrkind(struct cdrom_device_info *cdi, struct cdrom_ti *ti) +{ + struct cdrom_tocentry trk0_te, trk1_te; + struct cdrom_tochdr tochdr; + struct packet_command cgc; + int ntracks, ret; + + if ((ret = sr_audio_ioctl(cdi, CDROMREADTOCHDR, &tochdr))) + return ret; + + ntracks = tochdr.cdth_trk1 - tochdr.cdth_trk0 + 1; + + if (ti->cdti_trk1 == ntracks) + ti->cdti_trk1 = CDROM_LEADOUT; + else if (ti->cdti_trk1 != CDROM_LEADOUT) + ti->cdti_trk1 ++; + + trk0_te.cdte_track = ti->cdti_trk0; + trk0_te.cdte_format = CDROM_MSF; + trk1_te.cdte_track = ti->cdti_trk1; + trk1_te.cdte_format = CDROM_MSF; + + if ((ret = sr_audio_ioctl(cdi, CDROMREADTOCENTRY, &trk0_te))) + return ret; + if ((ret = sr_audio_ioctl(cdi, CDROMREADTOCENTRY, &trk1_te))) + return ret; + + memset(&cgc, 0, sizeof(struct packet_command)); + cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF; + cgc.cmd[3] = trk0_te.cdte_addr.msf.minute; + cgc.cmd[4] = trk0_te.cdte_addr.msf.second; + cgc.cmd[5] = trk0_te.cdte_addr.msf.frame; + cgc.cmd[6] = trk1_te.cdte_addr.msf.minute; + cgc.cmd[7] = trk1_te.cdte_addr.msf.second; + cgc.cmd[8] = trk1_te.cdte_addr.msf.frame; + cgc.data_direction = DMA_NONE; + cgc.timeout = IOCTL_TIMEOUT; + return sr_do_ioctl(cdi->handle, &cgc); +} + +/* We do our own retries because we want to know what the specific + error code is. Normally the UNIT_ATTENTION code will automatically + clear after one error */ + +int sr_do_ioctl(Scsi_CD *cd, struct packet_command *cgc) +{ + struct scsi_request *SRpnt; + struct scsi_device *SDev; + struct request *req; + int result, err = 0, retries = 0; + + SDev = cd->device; + SRpnt = scsi_allocate_request(SDev, GFP_KERNEL); + if (!SRpnt) { + printk(KERN_ERR "Unable to allocate SCSI request in sr_do_ioctl"); + err = -ENOMEM; + goto out; + } + SRpnt->sr_data_direction = cgc->data_direction; + + retry: + if (!scsi_block_when_processing_errors(SDev)) { + err = -ENODEV; + goto out_free; + } + + scsi_wait_req(SRpnt, cgc->cmd, cgc->buffer, cgc->buflen, + cgc->timeout, IOCTL_RETRIES); + + req = SRpnt->sr_request; + if (SRpnt->sr_buffer && req->buffer && SRpnt->sr_buffer != req->buffer) { + memcpy(req->buffer, SRpnt->sr_buffer, SRpnt->sr_bufflen); + kfree(SRpnt->sr_buffer); + SRpnt->sr_buffer = req->buffer; + } + + result = SRpnt->sr_result; + + /* Minimal error checking. Ignore cases we know about, and report the rest. */ + if (driver_byte(result) != 0) { + switch (SRpnt->sr_sense_buffer[2] & 0xf) { + case UNIT_ATTENTION: + SDev->changed = 1; + if (!cgc->quiet) + printk(KERN_INFO "%s: disc change detected.\n", cd->cdi.name); + if (retries++ < 10) + goto retry; + err = -ENOMEDIUM; + break; + case NOT_READY: /* This happens if there is no disc in drive */ + if (SRpnt->sr_sense_buffer[12] == 0x04 && + SRpnt->sr_sense_buffer[13] == 0x01) { + /* sense: Logical unit is in process of becoming ready */ + if (!cgc->quiet) + printk(KERN_INFO "%s: CDROM not ready yet.\n", cd->cdi.name); + if (retries++ < 10) { + /* sleep 2 sec and try again */ + ssleep(2); + goto retry; + } else { + /* 20 secs are enough? */ + err = -ENOMEDIUM; + break; + } + } + if (!cgc->quiet) + printk(KERN_INFO "%s: CDROM not ready. Make sure there is a disc in the drive.\n", cd->cdi.name); +#ifdef DEBUG + scsi_print_req_sense("sr", SRpnt); +#endif + err = -ENOMEDIUM; + break; + case ILLEGAL_REQUEST: + err = -EIO; + if (SRpnt->sr_sense_buffer[12] == 0x20 && + SRpnt->sr_sense_buffer[13] == 0x00) + /* sense: Invalid command operation code */ + err = -EDRIVE_CANT_DO_THIS; +#ifdef DEBUG + __scsi_print_command(cgc->cmd); + scsi_print_req_sense("sr", SRpnt); +#endif + break; + default: + printk(KERN_ERR "%s: CDROM (ioctl) error, command: ", cd->cdi.name); + __scsi_print_command(cgc->cmd); + scsi_print_req_sense("sr", SRpnt); + err = -EIO; + } + } + + if (cgc->sense) + memcpy(cgc->sense, SRpnt->sr_sense_buffer, sizeof(*cgc->sense)); + + /* Wake up a process waiting for device */ + out_free: + scsi_release_request(SRpnt); + SRpnt = NULL; + out: + cgc->stat = err; + return err; +} + +/* ---------------------------------------------------------------------- */ +/* interface to cdrom.c */ + +static int test_unit_ready(Scsi_CD *cd) +{ + struct packet_command cgc; + + memset(&cgc, 0, sizeof(struct packet_command)); + cgc.cmd[0] = GPCMD_TEST_UNIT_READY; + cgc.quiet = 1; + cgc.data_direction = DMA_NONE; + cgc.timeout = IOCTL_TIMEOUT; + return sr_do_ioctl(cd, &cgc); +} + +int sr_tray_move(struct cdrom_device_info *cdi, int pos) +{ + Scsi_CD *cd = cdi->handle; + struct packet_command cgc; + + memset(&cgc, 0, sizeof(struct packet_command)); + cgc.cmd[0] = GPCMD_START_STOP_UNIT; + cgc.cmd[4] = (pos == 0) ? 0x03 /* close */ : 0x02 /* eject */ ; + cgc.data_direction = DMA_NONE; + cgc.timeout = IOCTL_TIMEOUT; + return sr_do_ioctl(cd, &cgc); +} + +int sr_lock_door(struct cdrom_device_info *cdi, int lock) +{ + Scsi_CD *cd = cdi->handle; + + return scsi_set_medium_removal(cd->device, lock ? + SCSI_REMOVAL_PREVENT : SCSI_REMOVAL_ALLOW); +} + +int sr_drive_status(struct cdrom_device_info *cdi, int slot) +{ + if (CDSL_CURRENT != slot) { + /* we have no changer support */ + return -EINVAL; + } + if (0 == test_unit_ready(cdi->handle)) + return CDS_DISC_OK; + + return CDS_TRAY_OPEN; +} + +int sr_disk_status(struct cdrom_device_info *cdi) +{ + Scsi_CD *cd = cdi->handle; + struct cdrom_tochdr toc_h; + struct cdrom_tocentry toc_e; + int i, rc, have_datatracks = 0; + + /* look for data tracks */ + if (0 != (rc = sr_audio_ioctl(cdi, CDROMREADTOCHDR, &toc_h))) + return (rc == -ENOMEDIUM) ? CDS_NO_DISC : CDS_NO_INFO; + + for (i = toc_h.cdth_trk0; i <= toc_h.cdth_trk1; i++) { + toc_e.cdte_track = i; + toc_e.cdte_format = CDROM_LBA; + if (sr_audio_ioctl(cdi, CDROMREADTOCENTRY, &toc_e)) + return CDS_NO_INFO; + if (toc_e.cdte_ctrl & CDROM_DATA_TRACK) { + have_datatracks = 1; + break; + } + } + if (!have_datatracks) + return CDS_AUDIO; + + if (cd->xa_flag) + return CDS_XA_2_1; + else + return CDS_DATA_1; +} + +int sr_get_last_session(struct cdrom_device_info *cdi, + struct cdrom_multisession *ms_info) +{ + Scsi_CD *cd = cdi->handle; + + ms_info->addr.lba = cd->ms_offset; + ms_info->xa_flag = cd->xa_flag || cd->ms_offset > 0; + + return 0; +} + +/* primitive to determine whether we need to have GFP_DMA set based on + * the status of the unchecked_isa_dma flag in the host structure */ +#define SR_GFP_DMA(cd) (((cd)->device->host->unchecked_isa_dma) ? GFP_DMA : 0) + +int sr_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn) +{ + Scsi_CD *cd = cdi->handle; + struct packet_command cgc; + char *buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd)); + int result; + + memset(&cgc, 0, sizeof(struct packet_command)); + cgc.cmd[0] = GPCMD_READ_SUBCHANNEL; + cgc.cmd[2] = 0x40; /* I do want the subchannel info */ + cgc.cmd[3] = 0x02; /* Give me medium catalog number info */ + cgc.cmd[8] = 24; + cgc.buffer = buffer; + cgc.buflen = 24; + cgc.data_direction = DMA_FROM_DEVICE; + cgc.timeout = IOCTL_TIMEOUT; + result = sr_do_ioctl(cd, &cgc); + + memcpy(mcn->medium_catalog_number, buffer + 9, 13); + mcn->medium_catalog_number[13] = 0; + + kfree(buffer); + return result; +} + +int sr_reset(struct cdrom_device_info *cdi) +{ + return 0; +} + +int sr_select_speed(struct cdrom_device_info *cdi, int speed) +{ + Scsi_CD *cd = cdi->handle; + struct packet_command cgc; + + if (speed == 0) + speed = 0xffff; /* set to max */ + else + speed *= 177; /* Nx to kbyte/s */ + + memset(&cgc, 0, sizeof(struct packet_command)); + cgc.cmd[0] = GPCMD_SET_SPEED; /* SET CD SPEED */ + cgc.cmd[2] = (speed >> 8) & 0xff; /* MSB for speed (in kbytes/sec) */ + cgc.cmd[3] = speed & 0xff; /* LSB */ + cgc.data_direction = DMA_NONE; + cgc.timeout = IOCTL_TIMEOUT; + + if (sr_do_ioctl(cd, &cgc)) + return -EIO; + return 0; +} + +/* ----------------------------------------------------------------------- */ +/* this is called by the generic cdrom driver. arg is a _kernel_ pointer, */ +/* because the generic cdrom driver does the user access stuff for us. */ +/* only cdromreadtochdr and cdromreadtocentry are left - for use with the */ +/* sr_disk_status interface for the generic cdrom driver. */ + +int sr_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg) +{ + Scsi_CD *cd = cdi->handle; + struct packet_command cgc; + int result; + unsigned char *buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd)); + + if (!buffer) + return -ENOMEM; + + memset(&cgc, 0, sizeof(struct packet_command)); + cgc.timeout = IOCTL_TIMEOUT; + + switch (cmd) { + case CDROMREADTOCHDR: + { + struct cdrom_tochdr *tochdr = (struct cdrom_tochdr *) arg; + + cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP; + cgc.cmd[8] = 12; /* LSB of length */ + cgc.buffer = buffer; + cgc.buflen = 12; + cgc.quiet = 1; + cgc.data_direction = DMA_FROM_DEVICE; + + result = sr_do_ioctl(cd, &cgc); + + tochdr->cdth_trk0 = buffer[2]; + tochdr->cdth_trk1 = buffer[3]; + + break; + } + + case CDROMREADTOCENTRY: + { + struct cdrom_tocentry *tocentry = (struct cdrom_tocentry *) arg; + + cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP; + cgc.cmd[1] |= (tocentry->cdte_format == CDROM_MSF) ? 0x02 : 0; + cgc.cmd[6] = tocentry->cdte_track; + cgc.cmd[8] = 12; /* LSB of length */ + cgc.buffer = buffer; + cgc.buflen = 12; + cgc.data_direction = DMA_FROM_DEVICE; + + result = sr_do_ioctl(cd, &cgc); + + tocentry->cdte_ctrl = buffer[5] & 0xf; + tocentry->cdte_adr = buffer[5] >> 4; + tocentry->cdte_datamode = (tocentry->cdte_ctrl & 0x04) ? 1 : 0; + if (tocentry->cdte_format == CDROM_MSF) { + tocentry->cdte_addr.msf.minute = buffer[9]; + tocentry->cdte_addr.msf.second = buffer[10]; + tocentry->cdte_addr.msf.frame = buffer[11]; + } else + tocentry->cdte_addr.lba = (((((buffer[8] << 8) + buffer[9]) << 8) + + buffer[10]) << 8) + buffer[11]; + + break; + } + + case CDROMPLAYTRKIND: { + struct cdrom_ti* ti = (struct cdrom_ti*)arg; + + cgc.cmd[0] = GPCMD_PLAYAUDIO_TI; + cgc.cmd[4] = ti->cdti_trk0; + cgc.cmd[5] = ti->cdti_ind0; + cgc.cmd[7] = ti->cdti_trk1; + cgc.cmd[8] = ti->cdti_ind1; + cgc.data_direction = DMA_NONE; + + result = sr_do_ioctl(cd, &cgc); + if (result == -EDRIVE_CANT_DO_THIS) + result = sr_fake_playtrkind(cdi, ti); + + break; + } + + default: + result = -EINVAL; + } + +#if 0 + if (result) + printk("DEBUG: sr_audio: result for ioctl %x: %x\n", cmd, result); +#endif + + kfree(buffer); + return result; +} + +/* ----------------------------------------------------------------------- + * a function to read all sorts of funny cdrom sectors using the READ_CD + * scsi-3 mmc command + * + * lba: linear block address + * format: 0 = data (anything) + * 1 = audio + * 2 = data (mode 1) + * 3 = data (mode 2) + * 4 = data (mode 2 form1) + * 5 = data (mode 2 form2) + * blksize: 2048 | 2336 | 2340 | 2352 + */ + +static int sr_read_cd(Scsi_CD *cd, unsigned char *dest, int lba, int format, int blksize) +{ + struct packet_command cgc; + +#ifdef DEBUG + printk("%s: sr_read_cd lba=%d format=%d blksize=%d\n", + cd->cdi.name, lba, format, blksize); +#endif + + memset(&cgc, 0, sizeof(struct packet_command)); + cgc.cmd[0] = GPCMD_READ_CD; /* READ_CD */ + cgc.cmd[1] = ((format & 7) << 2); + cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff; + cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff; + cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff; + cgc.cmd[5] = (unsigned char) lba & 0xff; + cgc.cmd[8] = 1; + switch (blksize) { + case 2336: + cgc.cmd[9] = 0x58; + break; + case 2340: + cgc.cmd[9] = 0x78; + break; + case 2352: + cgc.cmd[9] = 0xf8; + break; + default: + cgc.cmd[9] = 0x10; + break; + } + cgc.buffer = dest; + cgc.buflen = blksize; + cgc.data_direction = DMA_FROM_DEVICE; + cgc.timeout = IOCTL_TIMEOUT; + return sr_do_ioctl(cd, &cgc); +} + +/* + * read sectors with blocksizes other than 2048 + */ + +static int sr_read_sector(Scsi_CD *cd, int lba, int blksize, unsigned char *dest) +{ + struct packet_command cgc; + int rc; + + /* we try the READ CD command first... */ + if (cd->readcd_known) { + rc = sr_read_cd(cd, dest, lba, 0, blksize); + if (-EDRIVE_CANT_DO_THIS != rc) + return rc; + cd->readcd_known = 0; + printk("CDROM does'nt support READ CD (0xbe) command\n"); + /* fall & retry the other way */ + } + /* ... if this fails, we switch the blocksize using MODE SELECT */ + if (blksize != cd->device->sector_size) { + if (0 != (rc = sr_set_blocklength(cd, blksize))) + return rc; + } +#ifdef DEBUG + printk("%s: sr_read_sector lba=%d blksize=%d\n", cd->cdi.name, lba, blksize); +#endif + + memset(&cgc, 0, sizeof(struct packet_command)); + cgc.cmd[0] = GPCMD_READ_10; + cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff; + cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff; + cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff; + cgc.cmd[5] = (unsigned char) lba & 0xff; + cgc.cmd[8] = 1; + cgc.buffer = dest; + cgc.buflen = blksize; + cgc.data_direction = DMA_FROM_DEVICE; + cgc.timeout = IOCTL_TIMEOUT; + rc = sr_do_ioctl(cd, &cgc); + + return rc; +} + +/* + * read a sector in raw mode to check the sector format + * ret: 1 == mode2 (XA), 0 == mode1, <0 == error + */ + +int sr_is_xa(Scsi_CD *cd) +{ + unsigned char *raw_sector; + int is_xa; + + if (!xa_test) + return 0; + + raw_sector = (unsigned char *) kmalloc(2048, GFP_KERNEL | SR_GFP_DMA(cd)); + if (!raw_sector) + return -ENOMEM; + if (0 == sr_read_sector(cd, cd->ms_offset + 16, + CD_FRAMESIZE_RAW1, raw_sector)) { + is_xa = (raw_sector[3] == 0x02) ? 1 : 0; + } else { + /* read a raw sector failed for some reason. */ + is_xa = -1; + } + kfree(raw_sector); +#ifdef DEBUG + printk("%s: sr_is_xa: %d\n", cd->cdi.name, is_xa); +#endif + return is_xa; +} + +int sr_dev_ioctl(struct cdrom_device_info *cdi, + unsigned int cmd, unsigned long arg) +{ + Scsi_CD *cd = cdi->handle; + int ret; + + ret = scsi_nonblockable_ioctl(cd->device, cmd, + (void __user *)arg, NULL); + /* + * ENODEV means that we didn't recognise the ioctl, or that we + * cannot execute it in the current device state. In either + * case fall through to scsi_ioctl, which will return ENDOEV again + * if it doesn't recognise the ioctl + */ + if (ret != -ENODEV) + return ret; + return scsi_ioctl(cd->device, cmd, (void __user *)arg); +} |
