diff options
Diffstat (limited to 'drivers/scsi/sr_ioctl.c')
-rw-r--r-- | drivers/scsi/sr_ioctl.c | 597 |
1 files changed, 597 insertions, 0 deletions
diff --git a/drivers/scsi/sr_ioctl.c b/drivers/scsi/sr_ioctl.c new file mode 100644 index 0000000000..5b0b35e60e --- /dev/null +++ b/drivers/scsi/sr_ioctl.c @@ -0,0 +1,597 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/fs.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/blkdev.h> +#include <linux/module.h> +#include <linux/blkpg.h> +#include <linux/cdrom.h> +#include <linux/delay.h> +#include <linux/slab.h> +#include <asm/io.h> +#include <linux/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_cmnd.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); + +static int sr_read_tochdr(struct cdrom_device_info *cdi, + struct cdrom_tochdr *tochdr) +{ + struct scsi_cd *cd = cdi->handle; + struct packet_command cgc; + int result; + unsigned char *buffer; + + buffer = kzalloc(32, GFP_KERNEL); + if (!buffer) + return -ENOMEM; + + memset(&cgc, 0, sizeof(struct packet_command)); + cgc.timeout = IOCTL_TIMEOUT; + 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); + if (result) + goto err; + + tochdr->cdth_trk0 = buffer[2]; + tochdr->cdth_trk1 = buffer[3]; + +err: + kfree(buffer); + return result; +} + +static int sr_read_tocentry(struct cdrom_device_info *cdi, + struct cdrom_tocentry *tocentry) +{ + struct scsi_cd *cd = cdi->handle; + struct packet_command cgc; + int result; + unsigned char *buffer; + + buffer = kzalloc(32, GFP_KERNEL); + if (!buffer) + return -ENOMEM; + + memset(&cgc, 0, sizeof(struct packet_command)); + cgc.timeout = IOCTL_TIMEOUT; + 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); + if (result) + goto err; + + 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]; + +err: + kfree(buffer); + return result; +} + +#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; + + ret = sr_read_tochdr(cdi, &tochdr); + if (ret) + 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; + + ret = sr_read_tocentry(cdi, &trk0_te); + if (ret) + return ret; + ret = sr_read_tocentry(cdi, &trk1_te); + if (ret) + 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); +} + +static int sr_play_trkind(struct cdrom_device_info *cdi, + struct cdrom_ti *ti) + +{ + struct scsi_cd *cd = cdi->handle; + struct packet_command cgc; + int result; + + memset(&cgc, 0, sizeof(struct packet_command)); + cgc.timeout = IOCTL_TIMEOUT; + 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); + + return result; +} + +/* 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_device *SDev; + struct scsi_sense_hdr local_sshdr, *sshdr; + int result, err = 0, retries = 0; + const struct scsi_exec_args exec_args = { + .sshdr = cgc->sshdr ? : &local_sshdr, + }; + + SDev = cd->device; + + sshdr = exec_args.sshdr; + + retry: + if (!scsi_block_when_processing_errors(SDev)) { + err = -ENODEV; + goto out; + } + + result = scsi_execute_cmd(SDev, cgc->cmd, + cgc->data_direction == DMA_TO_DEVICE ? + REQ_OP_DRV_OUT : REQ_OP_DRV_IN, cgc->buffer, + cgc->buflen, cgc->timeout, IOCTL_RETRIES, + &exec_args); + /* Minimal error checking. Ignore cases we know about, and report the rest. */ + if (result < 0) { + err = result; + goto out; + } + if (scsi_status_is_check_condition(result)) { + switch (sshdr->sense_key) { + case UNIT_ATTENTION: + SDev->changed = 1; + if (!cgc->quiet) + sr_printk(KERN_INFO, cd, + "disc change detected.\n"); + if (retries++ < 10) + goto retry; + err = -ENOMEDIUM; + break; + case NOT_READY: /* This happens if there is no disc in drive */ + if (sshdr->asc == 0x04 && + sshdr->ascq == 0x01) { + /* sense: Logical unit is in process of becoming ready */ + if (!cgc->quiet) + sr_printk(KERN_INFO, cd, + "CDROM not ready yet.\n"); + if (retries++ < 10) { + /* sleep 2 sec and try again */ + ssleep(2); + goto retry; + } else { + /* 20 secs are enough? */ + err = -ENOMEDIUM; + break; + } + } + if (!cgc->quiet) + sr_printk(KERN_INFO, cd, + "CDROM not ready. Make sure there " + "is a disc in the drive.\n"); + err = -ENOMEDIUM; + break; + case ILLEGAL_REQUEST: + err = -EIO; + if (sshdr->asc == 0x20 && + sshdr->ascq == 0x00) + /* sense: Invalid command operation code */ + err = -EDRIVE_CANT_DO_THIS; + break; + default: + err = -EIO; + } + } + + /* Wake up a process waiting for device */ + out: + cgc->stat = err; + return err; +} + +/* ---------------------------------------------------------------------- */ +/* interface to cdrom.c */ + +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) +{ + struct scsi_cd *cd = cdi->handle; + struct scsi_sense_hdr sshdr; + struct media_event_desc med; + + if (CDSL_CURRENT != slot) { + /* we have no changer support */ + return -EINVAL; + } + if (!scsi_test_unit_ready(cd->device, SR_TIMEOUT, MAX_RETRIES, &sshdr)) + return CDS_DISC_OK; + + /* SK/ASC/ASCQ of 2/4/1 means "unit is becoming ready" */ + if (scsi_sense_valid(&sshdr) && sshdr.sense_key == NOT_READY + && sshdr.asc == 0x04 && sshdr.ascq == 0x01) + return CDS_DRIVE_NOT_READY; + + if (!cdrom_get_media_event(cdi, &med)) { + if (med.media_present) + return CDS_DISC_OK; + else if (med.door_open) + return CDS_TRAY_OPEN; + else + return CDS_NO_DISC; + } + + /* + * SK/ASC/ASCQ of 2/4/2 means "initialization required" + * Using CD_TRAY_OPEN results in an START_STOP_UNIT to close + * the tray, which resolves the initialization requirement. + */ + if (scsi_sense_valid(&sshdr) && sshdr.sense_key == NOT_READY + && sshdr.asc == 0x04 && sshdr.ascq == 0x02) + return CDS_TRAY_OPEN; + + /* + * 0x04 is format in progress .. but there must be a disc present! + */ + if (sshdr.sense_key == NOT_READY && sshdr.asc == 0x04) + return CDS_DISC_OK; + + /* + * If not using Mt Fuji extended media tray reports, + * just return TRAY_OPEN since ATAPI doesn't provide + * any other way to detect this... + */ + if (scsi_sense_valid(&sshdr) && + /* 0x3a is medium not present */ + sshdr.asc == 0x3a) + return CDS_NO_DISC; + else + return CDS_TRAY_OPEN; + + return CDS_DRIVE_NOT_READY; +} + +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 */ + rc = sr_read_tochdr(cdi, &toc_h); + if (rc) + 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_read_tocentry(cdi, &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; +} + +int sr_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn) +{ + Scsi_CD *cd = cdi->handle; + struct packet_command cgc; + char *buffer = kzalloc(32, GFP_KERNEL); + int result; + + if (!buffer) + return -ENOMEM; + + 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); + if (result) + goto err; + + memcpy(mcn->medium_catalog_number, buffer + 9, 13); + mcn->medium_catalog_number[13] = 0; + +err: + 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) +{ + switch (cmd) { + case CDROMREADTOCHDR: + return sr_read_tochdr(cdi, arg); + case CDROMREADTOCENTRY: + return sr_read_tocentry(cdi, arg); + case CDROMPLAYTRKIND: + return sr_play_trkind(cdi, arg); + default: + return -EINVAL; + } +} + +/* ----------------------------------------------------------------------- + * 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 + sr_printk(KERN_INFO, cd, "sr_read_cd lba=%d format=%d blksize=%d\n", + 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; + sr_printk(KERN_INFO, cd, + "CDROM doesn't 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 + sr_printk(KERN_INFO, cd, "sr_read_sector lba=%d blksize=%d\n", + 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); + + if (blksize != CD_FRAMESIZE) + rc |= sr_set_blocklength(cd, CD_FRAMESIZE); + 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 = kmalloc(2048, GFP_KERNEL); + 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 + sr_printk(KERN_INFO, cd, "sr_is_xa: %d\n", is_xa); +#endif + return is_xa; +} |