diff options
Diffstat (limited to 'drivers/scsi/sr.c')
| -rw-r--r-- | drivers/scsi/sr.c | 1762 |
1 files changed, 908 insertions, 854 deletions
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c index b15966334..6ba9a2dd5 100644 --- a/drivers/scsi/sr.c +++ b/drivers/scsi/sr.c @@ -1,25 +1,28 @@ /* * sr.c Copyright (C) 1992 David Giller - * Copyright (C) 1993, 1994, 1995 Eric Youngdale + * Copyright (C) 1993, 1994, 1995 Eric Youngdale * * adapted from: - * sd.c Copyright (C) 1992 Drew Eckhardt - * Linux scsi disk driver by - * Drew Eckhardt <drew@colorado.edu> + * sd.c Copyright (C) 1992 Drew Eckhardt + * Linux scsi disk driver by + * Drew Eckhardt <drew@colorado.edu> * * Modified by Eric Youngdale ericy@cais.com to * add scatter-gather, multiple outstanding request, and other * enhancements. * - * Modified by Eric Youngdale eric@aib.com to support loadable - * low-level scsi drivers. + * Modified by Eric Youngdale eric@aib.com to support loadable + * low-level scsi drivers. * - * Modified by Thomas Quinot thomas@melchior.cuivre.fdn.fr to - * provide auto-eject. + * Modified by Thomas Quinot thomas@melchior.cuivre.fdn.fr to + * provide auto-eject. * * Modified by Gerd Knorr <kraxel@cs.tu-berlin.de> to support the * generic cdrom interface * + * Modified by Jens Axboe <axboe@image.dk> - Uniform sr_packet() + * interface, capabilities probe additions, ioctl cleanups, etc. + * */ #include <linux/module.h> @@ -34,19 +37,22 @@ #include <linux/interrupt.h> #include <asm/system.h> #include <asm/io.h> +#include <asm/uaccess.h> #define MAJOR_NR SCSI_CDROM_MAJOR #include <linux/blk.h> #include "scsi.h" #include "hosts.h" #include "sr.h" -#include <scsi/scsi_ioctl.h> /* For the door lock/unlock commands */ +#include <scsi/scsi_ioctl.h> /* For the door lock/unlock commands */ #include "constants.h" -MODULE_PARM(xa_test,"i"); /* see sr_ioctl.c */ +#ifdef MODULE +MODULE_PARM(xa_test, "i"); /* see sr_ioctl.c */ +#endif -#define MAX_RETRIES 3 -#define SR_TIMEOUT (30 * HZ) +#define MAX_RETRIES 3 +#define SR_TIMEOUT (30 * HZ) static int sr_init(void); static void sr_finish(void); @@ -54,53 +60,60 @@ static int sr_attach(Scsi_Device *); static int sr_detect(Scsi_Device *); static void sr_detach(Scsi_Device *); -struct Scsi_Device_Template sr_template = {NULL, "cdrom", "sr", NULL, TYPE_ROM, - SCSI_CDROM_MAJOR, 0, 0, 0, 1, - sr_detect, sr_init, - sr_finish, sr_attach, sr_detach}; +struct Scsi_Device_Template sr_template = { + NULL, "cdrom", "sr", NULL, TYPE_ROM, + SCSI_CDROM_MAJOR, 0, 0, 0, 1, + sr_detect, sr_init, + sr_finish, sr_attach, sr_detach +}; -Scsi_CD * scsi_CDs = NULL; -static int * sr_sizes = NULL; +Scsi_CD *scsi_CDs = NULL; +static int *sr_sizes = NULL; -static int * sr_blocksizes = NULL; +static int *sr_blocksizes = NULL; -static int sr_open(struct cdrom_device_info*, int); +static int sr_open(struct cdrom_device_info *, int); void get_sectorsize(int); void get_capabilities(int); -void requeue_sr_request (Scsi_Cmnd * SCpnt); -static int sr_media_change(struct cdrom_device_info*, int); +void requeue_sr_request(Scsi_Cmnd * SCpnt); +static int sr_media_change(struct cdrom_device_info *, int); +static int sr_packet(struct cdrom_device_info *, struct cdrom_generic_command *); static void sr_release(struct cdrom_device_info *cdi) { if (scsi_CDs[MINOR(cdi->dev)].sector_size > 2048) - sr_set_blocklength(MINOR(cdi->dev),2048); + sr_set_blocklength(MINOR(cdi->dev), 2048); sync_dev(cdi->dev); scsi_CDs[MINOR(cdi->dev)].device->access_count--; if (scsi_CDs[MINOR(cdi->dev)].device->host->hostt->module) __MOD_DEC_USE_COUNT(scsi_CDs[MINOR(cdi->dev)].device->host->hostt->module); - if(sr_template.module) - __MOD_DEC_USE_COUNT(sr_template.module); + if (sr_template.module) + __MOD_DEC_USE_COUNT(sr_template.module); } -static struct cdrom_device_ops sr_dops = { - sr_open, /* open */ - sr_release, /* release */ - sr_drive_status, /* drive status */ - sr_media_change, /* media changed */ - sr_tray_move, /* tray move */ - sr_lock_door, /* lock door */ - sr_select_speed, /* select speed */ - NULL, /* select disc */ - sr_get_last_session, /* get last session */ - sr_get_mcn, /* get universal product code */ - sr_reset, /* hard reset */ - sr_audio_ioctl, /* audio ioctl */ - sr_dev_ioctl, /* device-specific ioctl */ - CDC_CLOSE_TRAY | CDC_OPEN_TRAY| CDC_LOCK | CDC_SELECT_SPEED | - CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | CDC_PLAY_AUDIO | - CDC_RESET | CDC_IOCTLS | CDC_DRIVE_STATUS, - 0 +static struct cdrom_device_ops sr_dops = +{ + sr_open, /* open */ + sr_release, /* release */ + sr_drive_status, /* drive status */ + sr_media_change, /* media changed */ + sr_tray_move, /* tray move */ + sr_lock_door, /* lock door */ + sr_select_speed, /* select speed */ + NULL, /* select disc */ + sr_get_last_session, /* get last session */ + sr_get_mcn, /* get universal product code */ + sr_reset, /* hard reset */ + sr_audio_ioctl, /* audio ioctl */ + sr_dev_ioctl, /* device-specific ioctl */ + CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | + CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | + CDC_PLAY_AUDIO | CDC_RESET | CDC_IOCTLS | CDC_DRIVE_STATUS | + CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | + CDC_GENERIC_PACKET, + 0, + sr_packet }; /* @@ -113,48 +126,47 @@ static struct cdrom_device_ops sr_dops = { * an inode for that to work, and we do not always have one. */ -int sr_media_change(struct cdrom_device_info *cdi, int slot){ +int sr_media_change(struct cdrom_device_info *cdi, int slot) +{ int retval; - if (CDSL_CURRENT != slot) { - /* no changer support */ - return -EINVAL; - } - + if (CDSL_CURRENT != slot) { + /* no changer support */ + return -EINVAL; + } retval = scsi_ioctl(scsi_CDs[MINOR(cdi->dev)].device, - SCSI_IOCTL_TEST_UNIT_READY, 0); + SCSI_IOCTL_TEST_UNIT_READY, 0); - if(retval) - { - /* Unable to test, unit probably not ready. This usually + if (retval) { + /* Unable to test, unit probably not ready. This usually * means there is no disc in the drive. Mark as changed, * and we will figure it out later once the drive is * available again. */ - scsi_CDs[MINOR(cdi->dev)].device->changed = 1; - return 1; /* This will force a flush, if called from - * check_disk_change */ + scsi_CDs[MINOR(cdi->dev)].device->changed = 1; + return 1; /* This will force a flush, if called from + * check_disk_change */ }; retval = scsi_CDs[MINOR(cdi->dev)].device->changed; - scsi_CDs[MINOR(cdi->dev)].device->changed = 0; - /* If the disk changed, the capacity will now be different, - * so we force a re-read of this information */ - if (retval) { + scsi_CDs[MINOR(cdi->dev)].device->changed = 0; + /* If the disk changed, the capacity will now be different, + * so we force a re-read of this information */ + if (retval) { /* check multisession offset etc */ - sr_cd_check(cdi); - - /* - * If the disk changed, the capacity will now be different, - * so we force a re-read of this information - * Force 2048 for the sector size so that filesystems won't - * be trying to use something that is too small if the disc - * has changed. - */ - scsi_CDs[MINOR(cdi->dev)].needs_sector_size = 1; - - scsi_CDs[MINOR(cdi->dev)].sector_size = 2048; - } + sr_cd_check(cdi); + + /* + * If the disk changed, the capacity will now be different, + * so we force a re-read of this information + * Force 2048 for the sector size so that filesystems won't + * be trying to use something that is too small if the disc + * has changed. + */ + scsi_CDs[MINOR(cdi->dev)].needs_sector_size = 1; + + scsi_CDs[MINOR(cdi->dev)].sector_size = 2048; + } return retval; } @@ -163,7 +175,7 @@ int sr_media_change(struct cdrom_device_info *cdi, int slot){ * end of a SCSI read / write, and will take on of several actions based on success or failure. */ -static void rw_intr (Scsi_Cmnd * SCpnt) +static void rw_intr(Scsi_Cmnd * SCpnt) { int result = SCpnt->result; int this_count = SCpnt->this_count; @@ -171,137 +183,130 @@ static void rw_intr (Scsi_Cmnd * SCpnt) int block_sectors = 0; #ifdef DEBUG - printk("sr.c done: %x %x\n",result, SCpnt->request.bh->b_data); + printk("sr.c done: %x %x\n", result, SCpnt->request.bh->b_data); #endif - /* - Handle MEDIUM ERRORs or VOLUME OVERFLOWs that indicate partial success. - Since this is a relatively rare error condition, no care is taken to - avoid unnecessary additional work such as memcpy's that could be avoided. - */ - - if (driver_byte(result) != 0 && /* An error occurred */ - SCpnt->sense_buffer[0] == 0xF0 && /* Sense data is valid */ + /* + Handle MEDIUM ERRORs or VOLUME OVERFLOWs that indicate partial success. + Since this is a relatively rare error condition, no care is taken to + avoid unnecessary additional work such as memcpy's that could be avoided. + */ + + if (driver_byte(result) != 0 && /* An error occurred */ + SCpnt->sense_buffer[0] == 0xF0 && /* Sense data is valid */ (SCpnt->sense_buffer[2] == MEDIUM_ERROR || SCpnt->sense_buffer[2] == VOLUME_OVERFLOW || - SCpnt->sense_buffer[2] == ILLEGAL_REQUEST)) - { - long error_sector = (SCpnt->sense_buffer[3] << 24) | - (SCpnt->sense_buffer[4] << 16) | - (SCpnt->sense_buffer[5] << 8) | - SCpnt->sense_buffer[6]; - int device_nr = DEVICE_NR(SCpnt->request.rq_dev); - if (SCpnt->request.bh != NULL) - block_sectors = SCpnt->request.bh->b_size >> 9; - if (block_sectors < 4) block_sectors = 4; - if (scsi_CDs[device_nr].sector_size == 2048) - error_sector <<= 2; - error_sector &= ~ (block_sectors - 1); - good_sectors = error_sector - SCpnt->request.sector; - if (good_sectors < 0 || good_sectors >= this_count) - good_sectors = 0; - /* - The SCSI specification allows for the value returned by READ - CAPACITY to be up to 75 2K sectors past the last readable - block. Therefore, if we hit a medium error within the last - 75 2K sectors, we decrease the saved size value. - */ - if ((error_sector >> 1) < sr_sizes[device_nr] && - scsi_CDs[device_nr].capacity - error_sector < 4*75) - sr_sizes[device_nr] = error_sector >> 1; - } - - if (good_sectors > 0) - { /* Some sectors were read successfully. */ - if (SCpnt->use_sg == 0) { - if (SCpnt->buffer != SCpnt->request.buffer) - { - int offset; - offset = (SCpnt->request.sector % 4) << 9; - memcpy((char *)SCpnt->request.buffer, - (char *)SCpnt->buffer + offset, - good_sectors << 9); - /* Even though we are not using scatter-gather, we look - * ahead and see if there is a linked request for the - * other half of this buffer. If there is, then satisfy - * it. */ - if((offset == 0) && good_sectors == 2 && - SCpnt->request.nr_sectors > good_sectors && - SCpnt->request.bh && - SCpnt->request.bh->b_reqnext && - SCpnt->request.bh->b_reqnext->b_size == 1024) { - memcpy((char *)SCpnt->request.bh->b_reqnext->b_data, - (char *)SCpnt->buffer + 1024, - 1024); - good_sectors += 2; - }; - - scsi_free(SCpnt->buffer, 2048); - } - } else { - struct scatterlist * sgpnt; - int i; - sgpnt = (struct scatterlist *) SCpnt->buffer; - for(i=0; i<SCpnt->use_sg; i++) { - if (sgpnt[i].alt_address) { - if (sgpnt[i].alt_address != sgpnt[i].address) { - memcpy(sgpnt[i].alt_address, sgpnt[i].address, sgpnt[i].length); - }; - scsi_free(sgpnt[i].address, sgpnt[i].length); + SCpnt->sense_buffer[2] == ILLEGAL_REQUEST)) { + long error_sector = (SCpnt->sense_buffer[3] << 24) | + (SCpnt->sense_buffer[4] << 16) | + (SCpnt->sense_buffer[5] << 8) | + SCpnt->sense_buffer[6]; + int device_nr = DEVICE_NR(SCpnt->request.rq_dev); + if (SCpnt->request.bh != NULL) + block_sectors = SCpnt->request.bh->b_size >> 9; + if (block_sectors < 4) + block_sectors = 4; + if (scsi_CDs[device_nr].sector_size == 2048) + error_sector <<= 2; + error_sector &= ~(block_sectors - 1); + good_sectors = error_sector - SCpnt->request.sector; + if (good_sectors < 0 || good_sectors >= this_count) + good_sectors = 0; + /* + The SCSI specification allows for the value returned by READ + CAPACITY to be up to 75 2K sectors past the last readable + block. Therefore, if we hit a medium error within the last + 75 2K sectors, we decrease the saved size value. + */ + if ((error_sector >> 1) < sr_sizes[device_nr] && + scsi_CDs[device_nr].capacity - error_sector < 4 * 75) + sr_sizes[device_nr] = error_sector >> 1; + } + if (good_sectors > 0) { /* Some sectors were read successfully. */ + if (SCpnt->use_sg == 0) { + if (SCpnt->buffer != SCpnt->request.buffer) { + int offset; + offset = (SCpnt->request.sector % 4) << 9; + memcpy((char *) SCpnt->request.buffer, + (char *) SCpnt->buffer + offset, + good_sectors << 9); + /* Even though we are not using scatter-gather, we look + * ahead and see if there is a linked request for the + * other half of this buffer. If there is, then satisfy + * it. */ + if ((offset == 0) && good_sectors == 2 && + SCpnt->request.nr_sectors > good_sectors && + SCpnt->request.bh && + SCpnt->request.bh->b_reqnext && + SCpnt->request.bh->b_reqnext->b_size == 1024) { + memcpy((char *) SCpnt->request.bh->b_reqnext->b_data, + (char *) SCpnt->buffer + 1024, + 1024); + good_sectors += 2; + }; + + scsi_free(SCpnt->buffer, 2048); + } + } else { + struct scatterlist *sgpnt; + int i; + sgpnt = (struct scatterlist *) SCpnt->buffer; + for (i = 0; i < SCpnt->use_sg; i++) { + if (sgpnt[i].alt_address) { + if (sgpnt[i].alt_address != sgpnt[i].address) { + memcpy(sgpnt[i].alt_address, sgpnt[i].address, sgpnt[i].length); + }; + scsi_free(sgpnt[i].address, sgpnt[i].length); + }; + }; + scsi_free(SCpnt->buffer, SCpnt->sglist_len); /* Free list of scatter-gather pointers */ + if (SCpnt->request.sector % 4) + good_sectors -= 2; + /* See if there is a padding record at the end that needs to be removed */ + if (good_sectors > SCpnt->request.nr_sectors) + good_sectors -= 2; }; - }; - scsi_free(SCpnt->buffer, SCpnt->sglist_len); /* Free list of scatter-gather pointers */ - if(SCpnt->request.sector % 4) good_sectors -= 2; - /* See if there is a padding record at the end that needs to be removed */ - if(good_sectors > SCpnt->request.nr_sectors) - good_sectors -= 2; - }; #ifdef DEBUG - printk("(%x %x %x) ",SCpnt->request.bh, SCpnt->request.nr_sectors, + printk("(%x %x %x) ", SCpnt->request.bh, SCpnt->request.nr_sectors, good_sectors); #endif - if (SCpnt->request.nr_sectors > this_count) - { + if (SCpnt->request.nr_sectors > this_count) { SCpnt->request.errors = 0; if (!SCpnt->request.bh) - panic("sr.c: linked page request (%lx %x)", - SCpnt->request.sector, this_count); + panic("sr.c: linked page request (%lx %x)", + SCpnt->request.sector, this_count); + } + SCpnt = end_scsi_request(SCpnt, 1, good_sectors); /* All done */ + if (result == 0) { + requeue_sr_request(SCpnt); + return; + } } + if (good_sectors == 0) { + /* We only come through here if no sectors were read successfully. */ + + /* Free up any indirection buffers we allocated for DMA purposes. */ + if (SCpnt->use_sg) { + struct scatterlist *sgpnt; + int i; + sgpnt = (struct scatterlist *) SCpnt->buffer; + for (i = 0; i < SCpnt->use_sg; i++) { + if (sgpnt[i].alt_address) { + scsi_free(sgpnt[i].address, sgpnt[i].length); + } + } + scsi_free(SCpnt->buffer, SCpnt->sglist_len); /* Free list of scatter-gather pointers */ + } else { + if (SCpnt->buffer != SCpnt->request.buffer) + scsi_free(SCpnt->buffer, SCpnt->bufflen); + } - SCpnt = end_scsi_request(SCpnt, 1, good_sectors); /* All done */ - if (result == 0) - { - requeue_sr_request(SCpnt); - return; - } - } - - if (good_sectors == 0) { - /* We only come through here if no sectors were read successfully. */ - - /* Free up any indirection buffers we allocated for DMA purposes. */ - if (SCpnt->use_sg) { - struct scatterlist * sgpnt; - int i; - sgpnt = (struct scatterlist *) SCpnt->buffer; - for(i=0; i<SCpnt->use_sg; i++) { - if (sgpnt[i].alt_address) { - scsi_free(sgpnt[i].address, sgpnt[i].length); - } - } - scsi_free(SCpnt->buffer, SCpnt->sglist_len); /* Free list of scatter-gather pointers */ - } else { - if (SCpnt->buffer != SCpnt->request.buffer) - scsi_free(SCpnt->buffer, SCpnt->bufflen); } - - } - if (driver_byte(result) != 0) { if ((SCpnt->sense_buffer[0] & 0x7f) == 0x70) { if ((SCpnt->sense_buffer[2] & 0xf) == UNIT_ATTENTION) { /* detected disc change. set a bit and quietly refuse - * further access. */ + * further access. */ scsi_CDs[DEVICE_NR(SCpnt->request.rq_dev)].device->changed = 1; SCpnt = end_scsi_request(SCpnt, 0, this_count); @@ -309,10 +314,9 @@ static void rw_intr (Scsi_Cmnd * SCpnt) return; } } - if (SCpnt->sense_buffer[2] == ILLEGAL_REQUEST) { printk("sr%d: CD-ROM error: ", - DEVICE_NR(SCpnt->request.rq_dev)); + DEVICE_NR(SCpnt->request.rq_dev)); print_sense("sr", SCpnt); printk("command was: "); print_command(SCpnt->cmnd); @@ -323,95 +327,87 @@ static void rw_intr (Scsi_Cmnd * SCpnt) return; } else { SCpnt = end_scsi_request(SCpnt, 0, this_count); - requeue_sr_request(SCpnt); /* Do next request */ + requeue_sr_request(SCpnt); /* Do next request */ return; } } - if (SCpnt->sense_buffer[2] == NOT_READY) { printk(KERN_INFO "sr%d: CD-ROM not ready. Make sure you have a disc in the drive.\n", - DEVICE_NR(SCpnt->request.rq_dev)); + DEVICE_NR(SCpnt->request.rq_dev)); SCpnt = end_scsi_request(SCpnt, 0, this_count); - requeue_sr_request(SCpnt); /* Do next request */ + requeue_sr_request(SCpnt); /* Do next request */ return; } - if (SCpnt->sense_buffer[2] == MEDIUM_ERROR) { - printk("scsi%d: MEDIUM ERROR on " - "channel %d, id %d, lun %d, CDB: ", - SCpnt->host->host_no, (int) SCpnt->channel, - (int) SCpnt->target, (int) SCpnt->lun); - print_command(SCpnt->cmnd); - print_sense("sr", SCpnt); - SCpnt = end_scsi_request(SCpnt, 0, block_sectors); - requeue_sr_request(SCpnt); - return; + printk("scsi%d: MEDIUM ERROR on " + "channel %d, id %d, lun %d, CDB: ", + SCpnt->host->host_no, (int) SCpnt->channel, + (int) SCpnt->target, (int) SCpnt->lun); + print_command(SCpnt->cmnd); + print_sense("sr", SCpnt); + SCpnt = end_scsi_request(SCpnt, 0, block_sectors); + requeue_sr_request(SCpnt); + return; } - if (SCpnt->sense_buffer[2] == VOLUME_OVERFLOW) { - printk("scsi%d: VOLUME OVERFLOW on " - "channel %d, id %d, lun %d, CDB: ", - SCpnt->host->host_no, (int) SCpnt->channel, - (int) SCpnt->target, (int) SCpnt->lun); - print_command(SCpnt->cmnd); - print_sense("sr", SCpnt); - SCpnt = end_scsi_request(SCpnt, 0, block_sectors); - requeue_sr_request(SCpnt); - return; + printk("scsi%d: VOLUME OVERFLOW on " + "channel %d, id %d, lun %d, CDB: ", + SCpnt->host->host_no, (int) SCpnt->channel, + (int) SCpnt->target, (int) SCpnt->lun); + print_command(SCpnt->cmnd); + print_sense("sr", SCpnt); + SCpnt = end_scsi_request(SCpnt, 0, block_sectors); + requeue_sr_request(SCpnt); + return; } - } - + } /* We only get this far if we have an error we have not recognized */ - if(result) { - printk("SCSI CD error : host %d id %d lun %d return code = %03x\n", - scsi_CDs[DEVICE_NR(SCpnt->request.rq_dev)].device->host->host_no, - scsi_CDs[DEVICE_NR(SCpnt->request.rq_dev)].device->id, - scsi_CDs[DEVICE_NR(SCpnt->request.rq_dev)].device->lun, - result); - - if (status_byte(result) == CHECK_CONDITION) - print_sense("sr", SCpnt); - - SCpnt = end_scsi_request(SCpnt, 0, SCpnt->request.current_nr_sectors); - requeue_sr_request(SCpnt); - } + if (result) { + printk("SCSI CD error : host %d id %d lun %d return code = %03x\n", + scsi_CDs[DEVICE_NR(SCpnt->request.rq_dev)].device->host->host_no, + scsi_CDs[DEVICE_NR(SCpnt->request.rq_dev)].device->id, + scsi_CDs[DEVICE_NR(SCpnt->request.rq_dev)].device->lun, + result); + + if (status_byte(result) == CHECK_CONDITION) + print_sense("sr", SCpnt); + + SCpnt = end_scsi_request(SCpnt, 0, SCpnt->request.current_nr_sectors); + requeue_sr_request(SCpnt); + } } static int sr_open(struct cdrom_device_info *cdi, int purpose) { - check_disk_change(cdi->dev); - - if( MINOR(cdi->dev) >= sr_template.dev_max - || !scsi_CDs[MINOR(cdi->dev)].device) - { - return -ENXIO; /* No such device */ - } - - /* - * If the device is in error recovery, wait until it is done. - * If the device is offline, then disallow any access to it. - */ - if( !scsi_block_when_processing_errors(scsi_CDs[MINOR(cdi->dev)].device) ) - { - return -ENXIO; - } - - scsi_CDs[MINOR(cdi->dev)].device->access_count++; - if (scsi_CDs[MINOR(cdi->dev)].device->host->hostt->module) - __MOD_INC_USE_COUNT(scsi_CDs[MINOR(cdi->dev)].device->host->hostt->module); - if(sr_template.module) - __MOD_INC_USE_COUNT(sr_template.module); - - /* If this device did not have media in the drive at boot time, then - * we would have been unable to get the sector size. Check to see if - * this is the case, and try again. - */ - - if(scsi_CDs[MINOR(cdi->dev)].needs_sector_size) - get_sectorsize(MINOR(cdi->dev)); - - return 0; + check_disk_change(cdi->dev); + + if (MINOR(cdi->dev) >= sr_template.dev_max + || !scsi_CDs[MINOR(cdi->dev)].device) { + return -ENXIO; /* No such device */ + } + /* + * If the device is in error recovery, wait until it is done. + * If the device is offline, then disallow any access to it. + */ + if (!scsi_block_when_processing_errors(scsi_CDs[MINOR(cdi->dev)].device)) { + return -ENXIO; + } + scsi_CDs[MINOR(cdi->dev)].device->access_count++; + if (scsi_CDs[MINOR(cdi->dev)].device->host->hostt->module) + __MOD_INC_USE_COUNT(scsi_CDs[MINOR(cdi->dev)].device->host->hostt->module); + if (sr_template.module) + __MOD_INC_USE_COUNT(sr_template.module); + + /* If this device did not have media in the drive at boot time, then + * we would have been unable to get the sector size. Check to see if + * this is the case, and try again. + */ + + if (scsi_CDs[MINOR(cdi->dev)].needs_sector_size) + get_sectorsize(MINOR(cdi->dev)); + + return 0; } /* @@ -420,111 +416,106 @@ static int sr_open(struct cdrom_device_info *cdi, int purpose) * translate them to SCSI commands. */ -static void do_sr_request (void) +static void do_sr_request(void) { - Scsi_Cmnd * SCpnt = NULL; - struct request * req = NULL; - Scsi_Device * SDev; - int flag = 0; - - while (1==1){ - if (CURRENT != NULL && CURRENT->rq_status == RQ_INACTIVE) { - return; - }; - - INIT_SCSI_REQUEST; + Scsi_Cmnd *SCpnt = NULL; + struct request *req = NULL; + Scsi_Device *SDev; + int flag = 0; - SDev = scsi_CDs[DEVICE_NR(CURRENT->rq_dev)].device; + while (1 == 1) { + if (CURRENT != NULL && CURRENT->rq_status == RQ_INACTIVE) { + return; + }; - /* - * If the host for this device is in error recovery mode, don't - * do anything at all here. When the host leaves error recovery - * mode, it will automatically restart things and start queueing - * commands again. - */ - if( SDev->host->in_recovery ) - { - return; - } + INIT_SCSI_REQUEST; - /* - * I am not sure where the best place to do this is. We need - * to hook in a place where we are likely to come if in user - * space. - */ - if( SDev->was_reset ) - { - /* - * We need to relock the door, but we might - * be in an interrupt handler. Only do this - * from user space, since we do not want to - * sleep from an interrupt. - */ - if( SDev->removable && !in_interrupt() ) - { - spin_unlock_irq(&io_request_lock); /* FIXME!!!! */ - scsi_ioctl(SDev, SCSI_IOCTL_DOORLOCK, 0); - spin_lock_irq(&io_request_lock); /* FIXME!!!! */ - /* scsi_ioctl may allow CURRENT to change, so start over. */ - SDev->was_reset = 0; - continue; - } - SDev->was_reset = 0; - } + SDev = scsi_CDs[DEVICE_NR(CURRENT->rq_dev)].device; - /* we do lazy blocksize switching (when reading XA sectors, - * see CDROMREADMODE2 ioctl) */ - if (scsi_CDs[DEVICE_NR(CURRENT->rq_dev)].sector_size > 2048) { - if (!in_interrupt()) - sr_set_blocklength(DEVICE_NR(CURRENT->rq_dev),2048); + /* + * If the host for this device is in error recovery mode, don't + * do anything at all here. When the host leaves error recovery + * mode, it will automatically restart things and start queueing + * commands again. + */ + if (SDev->host->in_recovery) { + return; + } + /* + * I am not sure where the best place to do this is. We need + * to hook in a place where we are likely to come if in user + * space. + */ + if (SDev->was_reset) { + /* + * We need to relock the door, but we might + * be in an interrupt handler. Only do this + * from user space, since we do not want to + * sleep from an interrupt. + */ + if (SDev->removable && !in_interrupt()) { + spin_unlock_irq(&io_request_lock); /* FIXME!!!! */ + scsi_ioctl(SDev, SCSI_IOCTL_DOORLOCK, 0); + spin_lock_irq(&io_request_lock); /* FIXME!!!! */ + /* scsi_ioctl may allow CURRENT to change, so start over. */ + SDev->was_reset = 0; + continue; + } + SDev->was_reset = 0; + } + /* we do lazy blocksize switching (when reading XA sectors, + * see CDROMREADMODE2 ioctl) */ + if (scsi_CDs[DEVICE_NR(CURRENT->rq_dev)].sector_size > 2048) { + if (!in_interrupt()) + sr_set_blocklength(DEVICE_NR(CURRENT->rq_dev), 2048); #if 1 - else - printk("sr: can't switch blocksize: in interrupt\n"); + else + printk("sr: can't switch blocksize: in interrupt\n"); #endif - } - - if (flag++ == 0) - SCpnt = scsi_allocate_device(&CURRENT, - scsi_CDs[DEVICE_NR(CURRENT->rq_dev)].device, 0); - else SCpnt = NULL; - - /* This is a performance enhancement. We dig down into the request list and - * try to find a queueable request (i.e. device not busy, and host able to - * accept another command. If we find one, then we queue it. This can - * make a big difference on systems with more than one disk drive. We want - * to have the interrupts off when monkeying with the request list, because - * otherwise the kernel might try to slip in a request in between somewhere. */ - - if (!SCpnt && sr_template.nr_dev > 1){ - struct request *req1; - req1 = NULL; - req = CURRENT; - while(req){ - SCpnt = scsi_request_queueable(req, - scsi_CDs[DEVICE_NR(req->rq_dev)].device); - if(SCpnt) break; - req1 = req; - req = req->next; - } - if (SCpnt && req->rq_status == RQ_INACTIVE) { - if (req == CURRENT) - CURRENT = CURRENT->next; + } + if (flag++ == 0) + SCpnt = scsi_allocate_device(&CURRENT, + scsi_CDs[DEVICE_NR(CURRENT->rq_dev)].device, 0); else - req1->next = req->next; - } - } - - if (!SCpnt) - return; /* Could not find anything to do */ + SCpnt = NULL; + + /* This is a performance enhancement. We dig down into the request list and + * try to find a queueable request (i.e. device not busy, and host able to + * accept another command. If we find one, then we queue it. This can + * make a big difference on systems with more than one disk drive. We want + * to have the interrupts off when monkeying with the request list, because + * otherwise the kernel might try to slip in a request in between somewhere. */ + + if (!SCpnt && sr_template.nr_dev > 1) { + struct request *req1; + req1 = NULL; + req = CURRENT; + while (req) { + SCpnt = scsi_request_queueable(req, + scsi_CDs[DEVICE_NR(req->rq_dev)].device); + if (SCpnt) + break; + req1 = req; + req = req->next; + } + if (SCpnt && req->rq_status == RQ_INACTIVE) { + if (req == CURRENT) + CURRENT = CURRENT->next; + else + req1->next = req->next; + } + } + if (!SCpnt) + return; /* Could not find anything to do */ - wake_up(&wait_for_request); + wake_up(&wait_for_request); - /* Queue command */ - requeue_sr_request(SCpnt); - } /* While */ + /* Queue command */ + requeue_sr_request(SCpnt); + } /* While */ } -void requeue_sr_request (Scsi_Cmnd * SCpnt) +void requeue_sr_request(Scsi_Cmnd * SCpnt) { unsigned int dev, block, realcount; unsigned char cmd[10], *buffer, tries; @@ -532,244 +523,234 @@ void requeue_sr_request (Scsi_Cmnd * SCpnt) tries = 2; - repeat: - if(!SCpnt || SCpnt->request.rq_status == RQ_INACTIVE) { +repeat: + if (!SCpnt || SCpnt->request.rq_status == RQ_INACTIVE) { do_sr_request(); return; } - - dev = MINOR(SCpnt->request.rq_dev); + dev = MINOR(SCpnt->request.rq_dev); block = SCpnt->request.sector; buffer = NULL; this_count = 0; if (dev >= sr_template.nr_dev) { - /* printk("CD-ROM request error: invalid device.\n"); */ + /* printk("CD-ROM request error: invalid device.\n"); */ SCpnt = end_scsi_request(SCpnt, 0, SCpnt->request.nr_sectors); tries = 2; goto repeat; } - if (!scsi_CDs[dev].use) { - /* printk("CD-ROM request error: device marked not in use.\n"); */ + /* printk("CD-ROM request error: device marked not in use.\n"); */ + SCpnt = end_scsi_request(SCpnt, 0, SCpnt->request.nr_sectors); + tries = 2; + goto repeat; + } + if (!scsi_CDs[dev].device->online) { SCpnt = end_scsi_request(SCpnt, 0, SCpnt->request.nr_sectors); tries = 2; goto repeat; } - - if( !scsi_CDs[dev].device->online ) - { - SCpnt = end_scsi_request(SCpnt, 0, SCpnt->request.nr_sectors); - tries = 2; - goto repeat; - } - if (scsi_CDs[dev].device->changed) { - /* - * quietly refuse to do anything to a changed disc - * until the changed bit has been reset - */ - /* printk("CD-ROM has been changed. Prohibiting further I/O.\n"); */ + /* + * quietly refuse to do anything to a changed disc + * until the changed bit has been reset + */ + /* printk("CD-ROM has been changed. Prohibiting further I/O.\n"); */ SCpnt = end_scsi_request(SCpnt, 0, SCpnt->request.nr_sectors); tries = 2; goto repeat; } - - switch (SCpnt->request.cmd) - { - case WRITE: - SCpnt = end_scsi_request(SCpnt, 0, SCpnt->request.nr_sectors); - goto repeat; - break; - case READ : - cmd[0] = READ_6; - break; - default : - panic ("Unknown sr command %d\n", SCpnt->request.cmd); - } + switch (SCpnt->request.cmd) { + case WRITE: + SCpnt = end_scsi_request(SCpnt, 0, SCpnt->request.nr_sectors); + goto repeat; + break; + case READ: + cmd[0] = READ_6; + break; + default: + panic("Unknown sr command %d\n", SCpnt->request.cmd); + } cmd[1] = (SCpnt->lun << 5) & 0xe0; - /* - * Now do the grungy work of figuring out which sectors we need, and - * where in memory we are going to put them. - * - * The variables we need are: - * - * this_count= number of 512 byte sectors being read - * block = starting cdrom sector to read. - * realcount = # of cdrom sectors to read - * - * The major difference between a scsi disk and a scsi cdrom - * is that we will always use scatter-gather if we can, because we can - * work around the fact that the buffer cache has a block size of 1024, - * and we have 2048 byte sectors. This code should work for buffers that - * are any multiple of 512 bytes long. - */ + /* + * Now do the grungy work of figuring out which sectors we need, and + * where in memory we are going to put them. + * + * The variables we need are: + * + * this_count= number of 512 byte sectors being read + * block = starting cdrom sector to read. + * realcount = # of cdrom sectors to read + * + * The major difference between a scsi disk and a scsi cdrom + * is that we will always use scatter-gather if we can, because we can + * work around the fact that the buffer cache has a block size of 1024, + * and we have 2048 byte sectors. This code should work for buffers that + * are any multiple of 512 bytes long. + */ SCpnt->use_sg = 0; if (SCpnt->host->sg_tablesize > 0 && (!scsi_need_isa_buffer || - scsi_dma_free_sectors >= 10)) { - struct buffer_head * bh; - struct scatterlist * sgpnt; - int count, this_count_max; - bh = SCpnt->request.bh; - this_count = 0; - count = 0; - this_count_max = (scsi_CDs[dev].ten ? 0xffff : 0xff) << 4; - /* Calculate how many links we can use. First see if we need - * a padding record at the start */ - this_count = SCpnt->request.sector % 4; - if(this_count) count++; - while(bh && count < SCpnt->host->sg_tablesize) { - if ((this_count + (bh->b_size >> 9)) > this_count_max) break; - this_count += (bh->b_size >> 9); - count++; - bh = bh->b_reqnext; - }; - /* Fix up in case of an odd record at the end */ - end_rec = 0; - if(this_count % 4) { - if (count < SCpnt->host->sg_tablesize) { - count++; - end_rec = (4 - (this_count % 4)) << 9; - this_count += 4 - (this_count % 4); - } else { - count--; - this_count -= (this_count % 4); - }; - }; - SCpnt->use_sg = count; /* Number of chains */ - /* scsi_malloc can only allocate in chunks of 512 bytes */ - count = (SCpnt->use_sg * sizeof(struct scatterlist) + 511) & ~511; - - SCpnt->sglist_len = count; - sgpnt = (struct scatterlist * ) scsi_malloc(count); - if (!sgpnt) { - printk("Warning - running *really* short on DMA buffers\n"); - SCpnt->use_sg = 0; /* No memory left - bail out */ - } else { - buffer = (unsigned char *) sgpnt; - count = 0; - bh = SCpnt->request.bh; - if(SCpnt->request.sector % 4) { - sgpnt[count].length = (SCpnt->request.sector % 4) << 9; - sgpnt[count].address = (char *) scsi_malloc(sgpnt[count].length); - if(!sgpnt[count].address) panic("SCSI DMA pool exhausted."); - sgpnt[count].alt_address = sgpnt[count].address; /* Flag to delete - if needed */ - count++; - }; - for(bh = SCpnt->request.bh; count < SCpnt->use_sg; - count++, bh = bh->b_reqnext) { - if (bh) { /* Need a placeholder at the end of the record? */ - sgpnt[count].address = bh->b_data; - sgpnt[count].length = bh->b_size; - sgpnt[count].alt_address = NULL; - } else { - sgpnt[count].address = (char *) scsi_malloc(end_rec); - if(!sgpnt[count].address) panic("SCSI DMA pool exhausted."); - sgpnt[count].length = end_rec; - sgpnt[count].alt_address = sgpnt[count].address; - if (count+1 != SCpnt->use_sg) panic("Bad sr request list"); - break; + scsi_dma_free_sectors >= 10)) { + struct buffer_head *bh; + struct scatterlist *sgpnt; + int count, this_count_max; + bh = SCpnt->request.bh; + this_count = 0; + count = 0; + this_count_max = (scsi_CDs[dev].ten ? 0xffff : 0xff) << 4; + /* Calculate how many links we can use. First see if we need + * a padding record at the start */ + this_count = SCpnt->request.sector % 4; + if (this_count) + count++; + while (bh && count < SCpnt->host->sg_tablesize) { + if ((this_count + (bh->b_size >> 9)) > this_count_max) + break; + this_count += (bh->b_size >> 9); + count++; + bh = bh->b_reqnext; }; - if (virt_to_phys(sgpnt[count].address) + sgpnt[count].length - 1 > - ISA_DMA_THRESHOLD && SCpnt->host->unchecked_isa_dma) { - sgpnt[count].alt_address = sgpnt[count].address; - /* We try to avoid exhausting the DMA pool, since it is easier - * to control usage here. In other places we might have a more - * pressing need, and we would be screwed if we ran out */ - if(scsi_dma_free_sectors < (sgpnt[count].length >> 9) + 5) { - sgpnt[count].address = NULL; - } else { - sgpnt[count].address = (char *) scsi_malloc(sgpnt[count].length); - }; - /* If we start running low on DMA buffers, we abort the scatter-gather - * operation, and free all of the memory we have allocated. We want to - * ensure that all scsi operations are able to do at least a non-scatter/gather - * operation */ - if(sgpnt[count].address == NULL){ /* Out of dma memory */ - printk("Warning: Running low on SCSI DMA buffers\n"); - /* Try switching back to a non scatter-gather operation. */ - while(--count >= 0){ - if(sgpnt[count].alt_address) - scsi_free(sgpnt[count].address, sgpnt[count].length); + /* Fix up in case of an odd record at the end */ + end_rec = 0; + if (this_count % 4) { + if (count < SCpnt->host->sg_tablesize) { + count++; + end_rec = (4 - (this_count % 4)) << 9; + this_count += 4 - (this_count % 4); + } else { + count--; + this_count -= (this_count % 4); }; - SCpnt->use_sg = 0; - scsi_free(buffer, SCpnt->sglist_len); - break; - }; /* if address == NULL */ - }; /* if need DMA fixup */ - }; /* for loop to fill list */ + }; + SCpnt->use_sg = count; /* Number of chains */ + /* scsi_malloc can only allocate in chunks of 512 bytes */ + count = (SCpnt->use_sg * sizeof(struct scatterlist) + 511) & ~511; + + SCpnt->sglist_len = count; + sgpnt = (struct scatterlist *) scsi_malloc(count); + if (!sgpnt) { + printk("Warning - running *really* short on DMA buffers\n"); + SCpnt->use_sg = 0; /* No memory left - bail out */ + } else { + buffer = (unsigned char *) sgpnt; + count = 0; + bh = SCpnt->request.bh; + if (SCpnt->request.sector % 4) { + sgpnt[count].length = (SCpnt->request.sector % 4) << 9; + sgpnt[count].address = (char *) scsi_malloc(sgpnt[count].length); + if (!sgpnt[count].address) + panic("SCSI DMA pool exhausted."); + sgpnt[count].alt_address = sgpnt[count].address; /* Flag to delete + if needed */ + count++; + }; + for (bh = SCpnt->request.bh; count < SCpnt->use_sg; + count++, bh = bh->b_reqnext) { + if (bh) { /* Need a placeholder at the end of the record? */ + sgpnt[count].address = bh->b_data; + sgpnt[count].length = bh->b_size; + sgpnt[count].alt_address = NULL; + } else { + sgpnt[count].address = (char *) scsi_malloc(end_rec); + if (!sgpnt[count].address) + panic("SCSI DMA pool exhausted."); + sgpnt[count].length = end_rec; + sgpnt[count].alt_address = sgpnt[count].address; + if (count + 1 != SCpnt->use_sg) + panic("Bad sr request list"); + break; + }; + if (virt_to_phys(sgpnt[count].address) + sgpnt[count].length - 1 > + ISA_DMA_THRESHOLD && SCpnt->host->unchecked_isa_dma) { + sgpnt[count].alt_address = sgpnt[count].address; + /* We try to avoid exhausting the DMA pool, since it is easier + * to control usage here. In other places we might have a more + * pressing need, and we would be screwed if we ran out */ + if (scsi_dma_free_sectors < (sgpnt[count].length >> 9) + 5) { + sgpnt[count].address = NULL; + } else { + sgpnt[count].address = (char *) scsi_malloc(sgpnt[count].length); + }; + /* If we start running low on DMA buffers, we abort the scatter-gather + * operation, and free all of the memory we have allocated. We want to + * ensure that all scsi operations are able to do at least a non-scatter/gather + * operation */ + if (sgpnt[count].address == NULL) { /* Out of dma memory */ + printk("Warning: Running low on SCSI DMA buffers\n"); + /* Try switching back to a non scatter-gather operation. */ + while (--count >= 0) { + if (sgpnt[count].alt_address) + scsi_free(sgpnt[count].address, sgpnt[count].length); + }; + SCpnt->use_sg = 0; + scsi_free(buffer, SCpnt->sglist_len); + break; + }; /* if address == NULL */ + }; /* if need DMA fixup */ + }; /* for loop to fill list */ #ifdef DEBUG - printk("SR: %d %d %d %d %d *** ",SCpnt->use_sg, SCpnt->request.sector, - this_count, - SCpnt->request.current_nr_sectors, - SCpnt->request.nr_sectors); - for(count=0; count<SCpnt->use_sg; count++) - printk("SGlist: %d %x %x %x\n", count, - sgpnt[count].address, - sgpnt[count].alt_address, - sgpnt[count].length); + printk("SR: %d %d %d %d %d *** ", SCpnt->use_sg, SCpnt->request.sector, + this_count, + SCpnt->request.current_nr_sectors, + SCpnt->request.nr_sectors); + for (count = 0; count < SCpnt->use_sg; count++) + printk("SGlist: %d %x %x %x\n", count, + sgpnt[count].address, + sgpnt[count].alt_address, + sgpnt[count].length); #endif - }; /* Able to allocate scatter-gather list */ + }; /* Able to allocate scatter-gather list */ }; - if (SCpnt->use_sg == 0){ - /* We cannot use scatter-gather. Do this the old fashion way */ - if (!SCpnt->request.bh) - this_count = SCpnt->request.nr_sectors; - else - this_count = (SCpnt->request.bh->b_size >> 9); - - start = block % 4; - if (start) - { - this_count = ((this_count > 4 - start) ? - (4 - start) : (this_count)); - buffer = (unsigned char *) scsi_malloc(2048); - } - else if (this_count < 4) - { - buffer = (unsigned char *) scsi_malloc(2048); - } - else - { - this_count -= this_count % 4; - buffer = (unsigned char *) SCpnt->request.buffer; - if (virt_to_phys(buffer) + (this_count << 9) > ISA_DMA_THRESHOLD && - SCpnt->host->unchecked_isa_dma) - buffer = (unsigned char *) scsi_malloc(this_count << 9); - } + if (SCpnt->use_sg == 0) { + /* We cannot use scatter-gather. Do this the old fashion way */ + if (!SCpnt->request.bh) + this_count = SCpnt->request.nr_sectors; + else + this_count = (SCpnt->request.bh->b_size >> 9); + + start = block % 4; + if (start) { + this_count = ((this_count > 4 - start) ? + (4 - start) : (this_count)); + buffer = (unsigned char *) scsi_malloc(2048); + } else if (this_count < 4) { + buffer = (unsigned char *) scsi_malloc(2048); + } else { + this_count -= this_count % 4; + buffer = (unsigned char *) SCpnt->request.buffer; + if (virt_to_phys(buffer) + (this_count << 9) > ISA_DMA_THRESHOLD && + SCpnt->host->unchecked_isa_dma) + buffer = (unsigned char *) scsi_malloc(this_count << 9); + } }; if (scsi_CDs[dev].sector_size == 2048) - block = block >> 2; /* These are the sectors that the cdrom uses */ + block = block >> 2; /* These are the sectors that the cdrom uses */ else - block = block & 0xfffffffc; + block = block & 0xfffffffc; realcount = (this_count + 3) / 4; - if (scsi_CDs[dev].sector_size == 512) realcount = realcount << 2; - - /* - * Note: The scsi standard says that READ_6 is *optional*, while - * READ_10 is mandatory. Thus there is no point in using - * READ_6. - */ - if (scsi_CDs[dev].ten) - - { - if (realcount > 0xffff) - { + if (scsi_CDs[dev].sector_size == 512) + realcount = realcount << 2; + + /* + * Note: The scsi standard says that READ_6 is *optional*, while + * READ_10 is mandatory. Thus there is no point in using + * READ_6. + */ + if (scsi_CDs[dev].ten) { + if (realcount > 0xffff) { realcount = 0xffff; this_count = realcount * (scsi_CDs[dev].sector_size >> 9); - } - - cmd[0] += READ_10 - READ_6 ; + } + cmd[0] += READ_10 - READ_6; cmd[2] = (unsigned char) (block >> 24) & 0xff; cmd[3] = (unsigned char) (block >> 16) & 0xff; cmd[4] = (unsigned char) (block >> 8) & 0xff; @@ -777,164 +758,164 @@ void requeue_sr_request (Scsi_Cmnd * SCpnt) cmd[6] = cmd[9] = 0; cmd[7] = (unsigned char) (realcount >> 8) & 0xff; cmd[8] = (unsigned char) realcount & 0xff; - } - else - { - if (realcount > 0xff) - { - realcount = 0xff; - this_count = realcount * (scsi_CDs[dev].sector_size >> 9); + } else { + if (realcount > 0xff) { + realcount = 0xff; + this_count = realcount * (scsi_CDs[dev].sector_size >> 9); + } + cmd[1] |= (unsigned char) ((block >> 16) & 0x1f); + cmd[2] = (unsigned char) ((block >> 8) & 0xff); + cmd[3] = (unsigned char) block & 0xff; + cmd[4] = (unsigned char) realcount; + cmd[5] = 0; } - cmd[1] |= (unsigned char) ((block >> 16) & 0x1f); - cmd[2] = (unsigned char) ((block >> 8) & 0xff); - cmd[3] = (unsigned char) block & 0xff; - cmd[4] = (unsigned char) realcount; - cmd[5] = 0; - } - #ifdef DEBUG - { - int i; - printk("ReadCD: %d %d %d %d\n",block, realcount, buffer, this_count); - printk("Use sg: %d\n", SCpnt->use_sg); - printk("Dumping command: "); - for(i=0; i<12; i++) printk("%2.2x ", cmd[i]); - printk("\n"); - }; + { + int i; + printk("ReadCD: %d %d %d %d\n", block, realcount, buffer, this_count); + printk("Use sg: %d\n", SCpnt->use_sg); + printk("Dumping command: "); + for (i = 0; i < 12; i++) + printk("%2.2x ", cmd[i]); + printk("\n"); + }; #endif - /* Some dumb host adapters can speed transfers by knowing the - * minimum transfersize in advance. - * - * We shouldn't disconnect in the middle of a sector, but the cdrom - * sector size can be larger than the size of a buffer and the - * transfer may be split to the size of a buffer. So it's safe to - * assume that we can at least transfer the minimum of the buffer - * size (1024) and the sector size between each connect / disconnect. - */ + /* Some dumb host adapters can speed transfers by knowing the + * minimum transfersize in advance. + * + * We shouldn't disconnect in the middle of a sector, but the cdrom + * sector size can be larger than the size of a buffer and the + * transfer may be split to the size of a buffer. So it's safe to + * assume that we can at least transfer the minimum of the buffer + * size (1024) and the sector size between each connect / disconnect. + */ - SCpnt->transfersize = (scsi_CDs[dev].sector_size > 1024) ? - 1024 : scsi_CDs[dev].sector_size; + SCpnt->transfersize = (scsi_CDs[dev].sector_size > 1024) ? + 1024 : scsi_CDs[dev].sector_size; SCpnt->this_count = this_count; - scsi_do_cmd (SCpnt, (void *) cmd, buffer, - realcount * scsi_CDs[dev].sector_size, - rw_intr, SR_TIMEOUT, MAX_RETRIES); + scsi_do_cmd(SCpnt, (void *) cmd, buffer, + realcount * scsi_CDs[dev].sector_size, + rw_intr, SR_TIMEOUT, MAX_RETRIES); } -static int sr_detect(Scsi_Device * SDp){ +static int sr_detect(Scsi_Device * SDp) +{ - if(SDp->type != TYPE_ROM && SDp->type != TYPE_WORM) return 0; + if (SDp->type != TYPE_ROM && SDp->type != TYPE_WORM) + return 0; - printk("Detected scsi CD-ROM sr%d at scsi%d, channel %d, id %d, lun %d\n", - sr_template.dev_noticed++, - SDp->host->host_no, SDp->channel, SDp->id, SDp->lun); + printk("Detected scsi CD-ROM sr%d at scsi%d, channel %d, id %d, lun %d\n", + sr_template.dev_noticed++, + SDp->host->host_no, SDp->channel, SDp->id, SDp->lun); - return 1; + return 1; } -static int sr_attach(Scsi_Device * SDp){ - Scsi_CD * cpnt; - int i; - - if(SDp->type != TYPE_ROM && SDp->type != TYPE_WORM) return 1; +static int sr_attach(Scsi_Device * SDp) +{ + Scsi_CD *cpnt; + int i; - if (sr_template.nr_dev >= sr_template.dev_max) - { - SDp->attached--; - return 1; - } + if (SDp->type != TYPE_ROM && SDp->type != TYPE_WORM) + return 1; - for(cpnt = scsi_CDs, i=0; i<sr_template.dev_max; i++, cpnt++) - if(!cpnt->device) break; + if (sr_template.nr_dev >= sr_template.dev_max) { + SDp->attached--; + return 1; + } + for (cpnt = scsi_CDs, i = 0; i < sr_template.dev_max; i++, cpnt++) + if (!cpnt->device) + break; - if(i >= sr_template.dev_max) panic ("scsi_devices corrupt (sr)"); + if (i >= sr_template.dev_max) + panic("scsi_devices corrupt (sr)"); - SDp->scsi_request_fn = do_sr_request; - scsi_CDs[i].device = SDp; + SDp->scsi_request_fn = do_sr_request; + scsi_CDs[i].device = SDp; - sr_template.nr_dev++; - if(sr_template.nr_dev > sr_template.dev_max) - panic ("scsi_devices corrupt (sr)"); - return 0; + sr_template.nr_dev++; + if (sr_template.nr_dev > sr_template.dev_max) + panic("scsi_devices corrupt (sr)"); + return 0; } -static void sr_init_done (Scsi_Cmnd * SCpnt) +static void sr_init_done(Scsi_Cmnd * SCpnt) { - struct request * req; + struct request *req; - req = &SCpnt->request; - req->rq_status = RQ_SCSI_DONE; /* Busy, but indicate request done */ + req = &SCpnt->request; + req->rq_status = RQ_SCSI_DONE; /* Busy, but indicate request done */ - if (req->sem != NULL) { - up(req->sem); - } + if (req->sem != NULL) { + up(req->sem); + } } -void get_sectorsize(int i){ - unsigned char cmd[10]; - unsigned char *buffer; - int the_result, retries; - Scsi_Cmnd * SCpnt; - unsigned long flags; +void get_sectorsize(int i) +{ + unsigned char cmd[10]; + unsigned char *buffer; + int the_result, retries; + Scsi_Cmnd *SCpnt; + unsigned long flags; - buffer = (unsigned char *) scsi_malloc(512); - SCpnt = scsi_allocate_device(NULL, scsi_CDs[i].device, 1); + buffer = (unsigned char *) scsi_malloc(512); + SCpnt = scsi_allocate_device(NULL, scsi_CDs[i].device, 1); - retries = 3; - do { - cmd[0] = READ_CAPACITY; - cmd[1] = (scsi_CDs[i].device->lun << 5) & 0xe0; - memset ((void *) &cmd[2], 0, 8); - SCpnt->request.rq_status = RQ_SCSI_BUSY; /* Mark as really busy */ - SCpnt->cmd_len = 0; + retries = 3; + do { + cmd[0] = READ_CAPACITY; + cmd[1] = (scsi_CDs[i].device->lun << 5) & 0xe0; + memset((void *) &cmd[2], 0, 8); + SCpnt->request.rq_status = RQ_SCSI_BUSY; /* Mark as really busy */ + SCpnt->cmd_len = 0; - memset(buffer, 0, 8); + memset(buffer, 0, 8); - /* Do the command and wait.. */ - { - DECLARE_MUTEX_LOCKED(sem); - SCpnt->request.sem = &sem; - spin_lock_irqsave(&io_request_lock, flags); - scsi_do_cmd (SCpnt, - (void *) cmd, (void *) buffer, - 512, sr_init_done, SR_TIMEOUT, - MAX_RETRIES); - spin_unlock_irqrestore(&io_request_lock, flags); - down(&sem); - } + /* Do the command and wait.. */ - the_result = SCpnt->result; - retries--; + scsi_wait_cmd (SCpnt, (void *) cmd, (void *) buffer, + 512, sr_init_done, SR_TIMEOUT, MAX_RETRIES); - } while(the_result && retries); + the_result = SCpnt->result; + retries--; + } while (the_result && retries); - wake_up(&SCpnt->device->device_wait); - scsi_release_command(SCpnt); - SCpnt = NULL; - if (the_result) { - scsi_CDs[i].capacity = 0x1fffff; - scsi_CDs[i].sector_size = 2048; /* A guess, just in case */ - scsi_CDs[i].needs_sector_size = 1; - } else { - scsi_CDs[i].capacity = 1 + ((buffer[0] << 24) | - (buffer[1] << 16) | - (buffer[2] << 8) | - buffer[3]); - scsi_CDs[i].sector_size = (buffer[4] << 24) | - (buffer[5] << 16) | (buffer[6] << 8) | buffer[7]; - switch (scsi_CDs[i].sector_size) { - /* - * HP 4020i CD-Recorder reports 2340 byte sectors - * Philips CD-Writers report 2352 byte sectors - * - * Use 2k sectors for them.. - */ - case 0: case 2340: case 2352: + wake_up(&SCpnt->device->device_wait); + scsi_release_command(SCpnt); + SCpnt = NULL; + + if (the_result) { + scsi_CDs[i].capacity = 0x1fffff; + scsi_CDs[i].sector_size = 2048; /* A guess, just in case */ + scsi_CDs[i].needs_sector_size = 1; + } else { +#if 0 + if (cdrom_get_last_written(MKDEV(MAJOR_NR, i), + (long *) &scsi_CDs[i].capacity)) +#endif + scsi_CDs[i].capacity = 1 + ((buffer[0] << 24) | + (buffer[1] << 16) | + (buffer[2] << 8) | + buffer[3]); + scsi_CDs[i].sector_size = (buffer[4] << 24) | + (buffer[5] << 16) | (buffer[6] << 8) | buffer[7]; + switch (scsi_CDs[i].sector_size) { + /* + * HP 4020i CD-Recorder reports 2340 byte sectors + * Philips CD-Writers report 2352 byte sectors + * + * Use 2k sectors for them.. + */ + case 0: + case 2340: + case 2352: scsi_CDs[i].sector_size = 2048; /* fall through */ case 2048: @@ -943,229 +924,302 @@ void get_sectorsize(int i){ case 512: break; default: - printk ("sr%d: unsupported sector size %d.\n", - i, scsi_CDs[i].sector_size); + printk("sr%d: unsupported sector size %d.\n", + i, scsi_CDs[i].sector_size); scsi_CDs[i].capacity = 0; scsi_CDs[i].needs_sector_size = 1; - } + } - /* - * Add this so that we have the ability to correctly gauge - * what the device is capable of. - */ - scsi_CDs[i].needs_sector_size = 0; - sr_sizes[i] = scsi_CDs[i].capacity >> (BLOCK_SIZE_BITS - 9); - }; - scsi_free(buffer, 512); + /* + * Add this so that we have the ability to correctly gauge + * what the device is capable of. + */ + scsi_CDs[i].needs_sector_size = 0; + sr_sizes[i] = scsi_CDs[i].capacity >> (BLOCK_SIZE_BITS - 9); + }; + scsi_free(buffer, 512); } -void get_capabilities(int i){ - unsigned char cmd[6]; - unsigned char *buffer; - int rc,n; - - static char *loadmech[] = { - "caddy", - "tray", - "pop-up", - "", - "changer", - "changer", - "", - "" - }; - - buffer = (unsigned char *) scsi_malloc(512); - cmd[0] = MODE_SENSE; - cmd[1] = (scsi_CDs[i].device->lun << 5) & 0xe0; - cmd[2] = 0x2a; - cmd[4] = 128; - cmd[3] = cmd[5] = 0; - rc = sr_do_ioctl(i, cmd, buffer, 128, 1); - - if (-EINVAL == rc) { - /* failed, drive has'nt this mode page */ - scsi_CDs[i].cdi.speed = 1; - /* disable speed select, drive probably can't do this either */ - scsi_CDs[i].cdi.mask |= CDC_SELECT_SPEED; - } else { - n = buffer[3]+4; - scsi_CDs[i].cdi.speed = ((buffer[n+8] << 8) + buffer[n+9])/176; - scsi_CDs[i].readcd_known = 1; - scsi_CDs[i].readcd_cdda = buffer[n+5] & 0x01; - /* print some capability bits */ - printk("sr%i: scsi3-mmc drive: %dx/%dx %s%s%s%s%s\n",i, - ((buffer[n+14] << 8) + buffer[n+15])/176, - scsi_CDs[i].cdi.speed, - buffer[n+3]&0x01 ? "writer " : "", /* CD Writer */ - buffer[n+2]&0x02 ? "cd/rw " : "", /* can read rewriteable */ - buffer[n+4]&0x20 ? "xa/form2 " : "", /* can read xa/from2 */ - buffer[n+5]&0x01 ? "cdda " : "", /* can read audio data */ - loadmech[buffer[n+6]>>5]); - if ((buffer[n+6] >> 5) == 0) +void get_capabilities(int i) +{ + unsigned char cmd[6]; + unsigned char *buffer; + int rc, n; + + static char *loadmech[] = + { + "caddy", + "tray", + "pop-up", + "", + "changer", + "cartridge changer", + "", + "" + }; + + buffer = (unsigned char *) scsi_malloc(512); + cmd[0] = MODE_SENSE; + cmd[1] = (scsi_CDs[i].device->lun << 5) & 0xe0; + cmd[2] = 0x2a; + cmd[4] = 128; + cmd[3] = cmd[5] = 0; + rc = sr_do_ioctl(i, cmd, buffer, 128, 1); + + if (-EINVAL == rc) { + /* failed, drive has'nt this mode page */ + scsi_CDs[i].cdi.speed = 1; + /* disable speed select, drive probably can't do this either */ + scsi_CDs[i].cdi.mask |= CDC_SELECT_SPEED; + scsi_free(buffer, 512); + return; + } + n = buffer[3] + 4; + scsi_CDs[i].cdi.speed = ((buffer[n + 8] << 8) + buffer[n + 9]) / 176; + scsi_CDs[i].readcd_known = 1; + scsi_CDs[i].readcd_cdda = buffer[n + 5] & 0x01; + /* print some capability bits */ + printk("sr%i: scsi3-mmc drive: %dx/%dx %s%s%s%s%s\n", i, + ((buffer[n + 14] << 8) + buffer[n + 15]) / 176, + scsi_CDs[i].cdi.speed, + buffer[n + 3] & 0x01 ? "writer " : "", /* CD Writer */ + buffer[n + 2] & 0x02 ? "cd/rw " : "", /* can read rewriteable */ + buffer[n + 4] & 0x20 ? "xa/form2 " : "", /* can read xa/from2 */ + buffer[n + 5] & 0x01 ? "cdda " : "", /* can read audio data */ + loadmech[buffer[n + 6] >> 5]); + if ((buffer[n + 6] >> 5) == 0) /* caddy drives can't close tray... */ - scsi_CDs[i].cdi.mask |= CDC_CLOSE_TRAY; - } - scsi_free(buffer, 512); + scsi_CDs[i].cdi.mask |= CDC_CLOSE_TRAY; + if ((buffer[n + 2] & 0x8) == 0) + /* not a DVD drive */ + scsi_CDs[i].cdi.mask |= CDC_DVD; + if ((buffer[n + 3] & 0x20) == 0) + /* can't write DVD-RAM media */ + scsi_CDs[i].cdi.mask |= CDC_DVD_RAM; + if ((buffer[n + 3] & 0x10) == 0) + /* can't write DVD-R media */ + scsi_CDs[i].cdi.mask |= CDC_DVD_R; + if ((buffer[n + 3] & 0x2) == 0) + /* can't write CD-RW media */ + scsi_CDs[i].cdi.mask |= CDC_CD_RW; + if ((buffer[n + 3] & 0x1) == 0) + /* can't write CD-R media */ + scsi_CDs[i].cdi.mask |= CDC_CD_R; + if ((buffer[n+6] & 0x8) == 0) + /* can't eject */ + scsi_CDs[i].cdi.mask |= CDC_OPEN_TRAY; + + if ((buffer[n+6] >> 5) == mechtype_individual_changer || + (buffer[n+6] >> 5) == mechtype_cartridge_changer) + scsi_CDs[i].cdi.capacity = + cdrom_number_of_slots(&(scsi_CDs[i].cdi)); + if (scsi_CDs[i].cdi.capacity <= 1) + /* not a changer */ + scsi_CDs[i].cdi.mask |= CDC_SELECT_DISC; + /*else I don't think it can close its tray + scsi_CDs[i].cdi.mask |= CDC_CLOSE_TRAY; */ + + + scsi_free(buffer, 512); +} + +/* + * sr_packet() is the entry point for the generic commands generated + * by the Uniform CD-ROM layer. + */ +static int sr_packet(struct cdrom_device_info *cdi, struct cdrom_generic_command *cgc) +{ + Scsi_Cmnd *SCpnt; + Scsi_Device *device = scsi_CDs[MINOR(cdi->dev)].device; + unsigned long flags; + int stat; + + /* get the device */ + SCpnt = scsi_allocate_device(NULL, device, 1); + if (SCpnt == NULL) + return -ENODEV; /* this just doesn't seem right /axboe */ + + /* set the LUN */ + cgc->cmd[1] |= device->lun << 5; + + /* do the locking and issue the command */ + SCpnt->request.rq_dev = cdi->dev; + /* scsi_do_cmd sets the command length */ + SCpnt->cmd_len = 0; + + scsi_wait_cmd (SCpnt, (void *)cgc->cmd, (void *)cgc->buffer, cgc->buflen, + sr_init_done, SR_TIMEOUT, MAX_RETRIES); + + stat = SCpnt->result; + + /* release */ + SCpnt->request.rq_dev = MKDEV(0, 0); + scsi_release_command(SCpnt); + SCpnt = NULL; + + return stat; } static int sr_registered = 0; static int sr_init() { - int i; + int i; - if(sr_template.dev_noticed == 0) return 0; + if (sr_template.dev_noticed == 0) + return 0; - if(!sr_registered) { - if (register_blkdev(MAJOR_NR,"sr",&cdrom_fops)) { - printk("Unable to get major %d for SCSI-CD\n",MAJOR_NR); - return 1; + if (!sr_registered) { + if (register_blkdev(MAJOR_NR, "sr", &cdrom_fops)) { + printk("Unable to get major %d for SCSI-CD\n", MAJOR_NR); + return 1; + } + sr_registered++; } - sr_registered++; - } - + if (scsi_CDs) + return 0; + sr_template.dev_max = + sr_template.dev_noticed + SR_EXTRA_DEVS; + scsi_CDs = (Scsi_CD *) scsi_init_malloc(sr_template.dev_max * sizeof(Scsi_CD), GFP_ATOMIC); + memset(scsi_CDs, 0, sr_template.dev_max * sizeof(Scsi_CD)); - if (scsi_CDs) return 0; - sr_template.dev_max = - sr_template.dev_noticed + SR_EXTRA_DEVS; - scsi_CDs = (Scsi_CD *) scsi_init_malloc(sr_template.dev_max * sizeof(Scsi_CD), GFP_ATOMIC); - memset(scsi_CDs, 0, sr_template.dev_max * sizeof(Scsi_CD)); + sr_sizes = (int *) scsi_init_malloc(sr_template.dev_max * sizeof(int), GFP_ATOMIC); + memset(sr_sizes, 0, sr_template.dev_max * sizeof(int)); - sr_sizes = (int *) scsi_init_malloc(sr_template.dev_max * sizeof(int), GFP_ATOMIC); - memset(sr_sizes, 0, sr_template.dev_max * sizeof(int)); + sr_blocksizes = (int *) scsi_init_malloc(sr_template.dev_max * + sizeof(int), GFP_ATOMIC); - sr_blocksizes = (int *) scsi_init_malloc(sr_template.dev_max * - sizeof(int), GFP_ATOMIC); - - /* - * These are good guesses for the time being. - */ - for(i=0;i<sr_template.dev_max;i++) sr_blocksizes[i] = 2048; - blksize_size[MAJOR_NR] = sr_blocksizes; - return 0; + /* + * These are good guesses for the time being. + */ + for (i = 0; i < sr_template.dev_max; i++) + sr_blocksizes[i] = 2048; + blksize_size[MAJOR_NR] = sr_blocksizes; + return 0; } void sr_finish() { - int i; - char name[6]; - - blk_dev[MAJOR_NR].request_fn = DEVICE_REQUEST; - blk_size[MAJOR_NR] = sr_sizes; - - for (i = 0; i < sr_template.nr_dev; ++i) - { - /* If we have already seen this, then skip it. Comes up - * with loadable modules. */ - if (scsi_CDs[i].capacity) continue; - scsi_CDs[i].capacity = 0x1fffff; - scsi_CDs[i].sector_size = 2048; /* A guess, just in case */ - scsi_CDs[i].needs_sector_size = 1; - scsi_CDs[i].device->changed = 1; /* force recheck CD type */ + int i; + char name[6]; + + blk_dev[MAJOR_NR].request_fn = DEVICE_REQUEST; + blk_size[MAJOR_NR] = sr_sizes; + + for (i = 0; i < sr_template.nr_dev; ++i) { + /* If we have already seen this, then skip it. Comes up + * with loadable modules. */ + if (scsi_CDs[i].capacity) + continue; + scsi_CDs[i].capacity = 0x1fffff; + scsi_CDs[i].sector_size = 2048; /* A guess, just in case */ + scsi_CDs[i].needs_sector_size = 1; + scsi_CDs[i].device->changed = 1; /* force recheck CD type */ #if 0 - /* seems better to leave this for later */ - get_sectorsize(i); - printk("Scd sectorsize = %d bytes.\n", scsi_CDs[i].sector_size); + /* seems better to leave this for later */ + get_sectorsize(i); + printk("Scd sectorsize = %d bytes.\n", scsi_CDs[i].sector_size); #endif - scsi_CDs[i].use = 1; - scsi_CDs[i].ten = 1; - scsi_CDs[i].remap = 1; - scsi_CDs[i].readcd_known = 0; - scsi_CDs[i].readcd_cdda = 0; - sr_sizes[i] = scsi_CDs[i].capacity >> (BLOCK_SIZE_BITS - 9); - - scsi_CDs[i].cdi.ops = &sr_dops; - scsi_CDs[i].cdi.handle = &scsi_CDs[i]; - scsi_CDs[i].cdi.dev = MKDEV(MAJOR_NR,i); - scsi_CDs[i].cdi.mask = 0; - scsi_CDs[i].cdi.capacity = 1; - get_capabilities(i); - sr_vendor_init(i); - - sprintf(name, "sr%d", i); - strcpy(scsi_CDs[i].cdi.name, name); - register_cdrom(&scsi_CDs[i].cdi); - } - - - /* If our host adapter is capable of scatter-gather, then we increase - * the read-ahead to 16 blocks (32 sectors). If not, we use - * a two block (4 sector) read ahead. */ - if(scsi_CDs[0].device && scsi_CDs[0].device->host->sg_tablesize) - read_ahead[MAJOR_NR] = 32; /* 32 sector read-ahead. Always removable. */ - else - read_ahead[MAJOR_NR] = 4; /* 4 sector read-ahead */ - - return; + scsi_CDs[i].use = 1; + scsi_CDs[i].ten = 1; + scsi_CDs[i].remap = 1; + scsi_CDs[i].readcd_known = 0; + scsi_CDs[i].readcd_cdda = 0; + sr_sizes[i] = scsi_CDs[i].capacity >> (BLOCK_SIZE_BITS - 9); + + scsi_CDs[i].cdi.ops = &sr_dops; + scsi_CDs[i].cdi.handle = &scsi_CDs[i]; + scsi_CDs[i].cdi.dev = MKDEV(MAJOR_NR, i); + scsi_CDs[i].cdi.mask = 0; + scsi_CDs[i].cdi.capacity = 1; + get_capabilities(i); + sr_vendor_init(i); + + sprintf(name, "sr%d", i); + strcpy(scsi_CDs[i].cdi.name, name); + register_cdrom(&scsi_CDs[i].cdi); + } + + + /* If our host adapter is capable of scatter-gather, then we increase + * the read-ahead to 16 blocks (32 sectors). If not, we use + * a two block (4 sector) read ahead. */ + if (scsi_CDs[0].device && scsi_CDs[0].device->host->sg_tablesize) + read_ahead[MAJOR_NR] = 32; /* 32 sector read-ahead. Always removable. */ + else + read_ahead[MAJOR_NR] = 4; /* 4 sector read-ahead */ + + return; } static void sr_detach(Scsi_Device * SDp) { - Scsi_CD * cpnt; - int i; - - for(cpnt = scsi_CDs, i=0; i<sr_template.dev_max; i++, cpnt++) - if(cpnt->device == SDp) { - kdev_t devi = MKDEV(MAJOR_NR, i); - struct super_block * sb = get_super(devi); - - /* - * Since the cdrom is read-only, no need to sync the device. - * We should be kind to our buffer cache, however. - */ - if (sb) invalidate_inodes(sb); - invalidate_buffers(devi); - - /* - * Reset things back to a sane state so that one can re-load a new - * driver (perhaps the same one). - */ - unregister_cdrom(&(cpnt->cdi)); - cpnt->device = NULL; - cpnt->capacity = 0; - SDp->attached--; - sr_template.nr_dev--; - sr_template.dev_noticed--; - sr_sizes[i] = 0; - return; - } - return; + Scsi_CD *cpnt; + int i; + + for (cpnt = scsi_CDs, i = 0; i < sr_template.dev_max; i++, cpnt++) + if (cpnt->device == SDp) { + kdev_t devi = MKDEV(MAJOR_NR, i); + struct super_block *sb = get_super(devi); + + /* + * Since the cdrom is read-only, no need to sync the device. + * We should be kind to our buffer cache, however. + */ + if (sb) + invalidate_inodes(sb); + invalidate_buffers(devi); + + /* + * Reset things back to a sane state so that one can re-load a new + * driver (perhaps the same one). + */ + unregister_cdrom(&(cpnt->cdi)); + cpnt->device = NULL; + cpnt->capacity = 0; + SDp->attached--; + sr_template.nr_dev--; + sr_template.dev_noticed--; + sr_sizes[i] = 0; + return; + } + return; } #ifdef MODULE -int init_module(void) { - sr_template.module = &__this_module; - return scsi_register_module(MODULE_SCSI_DEV, &sr_template); +int init_module(void) +{ + sr_template.module = &__this_module; + return scsi_register_module(MODULE_SCSI_DEV, &sr_template); } -void cleanup_module( void) +void cleanup_module(void) { - scsi_unregister_module(MODULE_SCSI_DEV, &sr_template); - unregister_blkdev(MAJOR_NR, "sr"); - sr_registered--; - if(scsi_CDs != NULL) { - scsi_init_free((char *) scsi_CDs, - (sr_template.dev_noticed + SR_EXTRA_DEVS) - * sizeof(Scsi_CD)); - - scsi_init_free((char *) sr_sizes, sr_template.dev_max * sizeof(int)); - sr_sizes = NULL; - - scsi_init_free((char *) sr_blocksizes, sr_template.dev_max * sizeof(int)); - sr_blocksizes = NULL; - } - - blksize_size[MAJOR_NR] = NULL; - blk_dev[MAJOR_NR].request_fn = NULL; - blk_size[MAJOR_NR] = NULL; - read_ahead[MAJOR_NR] = 0; - - sr_template.dev_max = 0; + scsi_unregister_module(MODULE_SCSI_DEV, &sr_template); + unregister_blkdev(MAJOR_NR, "sr"); + sr_registered--; + if (scsi_CDs != NULL) { + scsi_init_free((char *) scsi_CDs, + (sr_template.dev_noticed + SR_EXTRA_DEVS) + * sizeof(Scsi_CD)); + + scsi_init_free((char *) sr_sizes, sr_template.dev_max * sizeof(int)); + sr_sizes = NULL; + + scsi_init_free((char *) sr_blocksizes, sr_template.dev_max * sizeof(int)); + sr_blocksizes = NULL; + } + blksize_size[MAJOR_NR] = NULL; + blk_dev[MAJOR_NR].request_fn = NULL; + blk_size[MAJOR_NR] = NULL; + read_ahead[MAJOR_NR] = 0; + + sr_template.dev_max = 0; } -#endif /* MODULE */ + +#endif /* MODULE */ /* * Overrides for Emacs so that we follow Linus's tabbing style. |