![Linus Torvalds](/assets/img/avatar_default.png)
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
1175 lines
33 KiB
C
1175 lines
33 KiB
C
/*
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* linux/drivers/scsi/ide-scsi.c Version 0.9 Jul 4, 1999
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*
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* Copyright (C) 1996 - 1999 Gadi Oxman <gadio@netvision.net.il>
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*/
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/*
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* Emulation of a SCSI host adapter for IDE ATAPI devices.
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*
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* With this driver, one can use the Linux SCSI drivers instead of the
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* native IDE ATAPI drivers.
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*
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* Ver 0.1 Dec 3 96 Initial version.
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* Ver 0.2 Jan 26 97 Fixed bug in cleanup_module() and added emulation
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* of MODE_SENSE_6/MODE_SELECT_6 for cdroms. Thanks
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* to Janos Farkas for pointing this out.
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* Avoid using bitfields in structures for m68k.
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* Added Scatter/Gather and DMA support.
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* Ver 0.4 Dec 7 97 Add support for ATAPI PD/CD drives.
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* Use variable timeout for each command.
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* Ver 0.5 Jan 2 98 Fix previous PD/CD support.
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* Allow disabling of SCSI-6 to SCSI-10 transformation.
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* Ver 0.6 Jan 27 98 Allow disabling of SCSI command translation layer
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* for access through /dev/sg.
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* Fix MODE_SENSE_6/MODE_SELECT_6/INQUIRY translation.
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* Ver 0.7 Dec 04 98 Ignore commands where lun != 0 to avoid multiple
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* detection of devices with CONFIG_SCSI_MULTI_LUN
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* Ver 0.8 Feb 05 99 Optical media need translation too. Reverse 0.7.
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* Ver 0.9 Jul 04 99 Fix a bug in SG_SET_TRANSFORM.
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* Ver 0.91 Jun 10 02 Fix "off by one" error in transforms
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* Ver 0.92 Dec 31 02 Implement new SCSI mid level API
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*/
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#define IDESCSI_VERSION "0.92"
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#include <linux/module.h>
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#include <linux/config.h>
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#include <linux/types.h>
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#include <linux/string.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/ioport.h>
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#include <linux/blkdev.h>
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#include <linux/errno.h>
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#include <linux/hdreg.h>
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#include <linux/slab.h>
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#include <linux/ide.h>
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#include <linux/scatterlist.h>
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#include <asm/io.h>
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#include <asm/bitops.h>
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#include <asm/uaccess.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_cmnd.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_tcq.h>
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#include <scsi/sg.h>
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#define IDESCSI_DEBUG_LOG 0
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typedef struct idescsi_pc_s {
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u8 c[12]; /* Actual packet bytes */
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int request_transfer; /* Bytes to transfer */
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int actually_transferred; /* Bytes actually transferred */
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int buffer_size; /* Size of our data buffer */
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struct request *rq; /* The corresponding request */
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u8 *buffer; /* Data buffer */
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u8 *current_position; /* Pointer into the above buffer */
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struct scatterlist *sg; /* Scatter gather table */
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int b_count; /* Bytes transferred from current entry */
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struct scsi_cmnd *scsi_cmd; /* SCSI command */
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void (*done)(struct scsi_cmnd *); /* Scsi completion routine */
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unsigned long flags; /* Status/Action flags */
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unsigned long timeout; /* Command timeout */
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} idescsi_pc_t;
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/*
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* Packet command status bits.
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*/
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#define PC_DMA_IN_PROGRESS 0 /* 1 while DMA in progress */
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#define PC_WRITING 1 /* Data direction */
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#define PC_TRANSFORM 2 /* transform SCSI commands */
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#define PC_TIMEDOUT 3 /* command timed out */
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#define PC_DMA_OK 4 /* Use DMA */
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/*
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* SCSI command transformation layer
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*/
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#define IDESCSI_TRANSFORM 0 /* Enable/Disable transformation */
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#define IDESCSI_SG_TRANSFORM 1 /* /dev/sg transformation */
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/*
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* Log flags
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*/
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#define IDESCSI_LOG_CMD 0 /* Log SCSI commands */
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typedef struct ide_scsi_obj {
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ide_drive_t *drive;
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ide_driver_t *driver;
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struct gendisk *disk;
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struct Scsi_Host *host;
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idescsi_pc_t *pc; /* Current packet command */
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unsigned long flags; /* Status/Action flags */
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unsigned long transform; /* SCSI cmd translation layer */
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unsigned long log; /* log flags */
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} idescsi_scsi_t;
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static DECLARE_MUTEX(idescsi_ref_sem);
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#define ide_scsi_g(disk) \
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container_of((disk)->private_data, struct ide_scsi_obj, driver)
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static struct ide_scsi_obj *ide_scsi_get(struct gendisk *disk)
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{
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struct ide_scsi_obj *scsi = NULL;
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down(&idescsi_ref_sem);
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scsi = ide_scsi_g(disk);
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if (scsi)
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scsi_host_get(scsi->host);
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up(&idescsi_ref_sem);
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return scsi;
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}
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static void ide_scsi_put(struct ide_scsi_obj *scsi)
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{
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down(&idescsi_ref_sem);
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scsi_host_put(scsi->host);
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up(&idescsi_ref_sem);
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}
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static inline idescsi_scsi_t *scsihost_to_idescsi(struct Scsi_Host *host)
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{
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return (idescsi_scsi_t*) (&host[1]);
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}
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static inline idescsi_scsi_t *drive_to_idescsi(ide_drive_t *ide_drive)
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{
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return scsihost_to_idescsi(ide_drive->driver_data);
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}
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/*
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* Per ATAPI device status bits.
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*/
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#define IDESCSI_DRQ_INTERRUPT 0 /* DRQ interrupt device */
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/*
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* ide-scsi requests.
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*/
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#define IDESCSI_PC_RQ 90
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static void idescsi_discard_data (ide_drive_t *drive, unsigned int bcount)
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{
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while (bcount--)
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(void) HWIF(drive)->INB(IDE_DATA_REG);
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}
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static void idescsi_output_zeros (ide_drive_t *drive, unsigned int bcount)
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{
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while (bcount--)
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HWIF(drive)->OUTB(0, IDE_DATA_REG);
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}
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/*
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* PIO data transfer routines using the scatter gather table.
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*/
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static void idescsi_input_buffers (ide_drive_t *drive, idescsi_pc_t *pc, unsigned int bcount)
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{
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int count;
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char *buf;
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while (bcount) {
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if (pc->sg - (struct scatterlist *) pc->scsi_cmd->request_buffer > pc->scsi_cmd->use_sg) {
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printk (KERN_ERR "ide-scsi: scatter gather table too small, discarding data\n");
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idescsi_discard_data (drive, bcount);
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return;
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}
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count = min(pc->sg->length - pc->b_count, bcount);
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buf = page_address(pc->sg->page) + pc->sg->offset;
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drive->hwif->atapi_input_bytes(drive, buf + pc->b_count, count);
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bcount -= count; pc->b_count += count;
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if (pc->b_count == pc->sg->length) {
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pc->sg++;
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pc->b_count = 0;
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}
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}
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}
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static void idescsi_output_buffers (ide_drive_t *drive, idescsi_pc_t *pc, unsigned int bcount)
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{
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int count;
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char *buf;
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while (bcount) {
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if (pc->sg - (struct scatterlist *) pc->scsi_cmd->request_buffer > pc->scsi_cmd->use_sg) {
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printk (KERN_ERR "ide-scsi: scatter gather table too small, padding with zeros\n");
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idescsi_output_zeros (drive, bcount);
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return;
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}
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count = min(pc->sg->length - pc->b_count, bcount);
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buf = page_address(pc->sg->page) + pc->sg->offset;
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drive->hwif->atapi_output_bytes(drive, buf + pc->b_count, count);
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bcount -= count; pc->b_count += count;
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if (pc->b_count == pc->sg->length) {
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pc->sg++;
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pc->b_count = 0;
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}
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}
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}
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/*
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* Most of the SCSI commands are supported directly by ATAPI devices.
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* idescsi_transform_pc handles the few exceptions.
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*/
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static inline void idescsi_transform_pc1 (ide_drive_t *drive, idescsi_pc_t *pc)
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{
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u8 *c = pc->c, *scsi_buf = pc->buffer, *sc = pc->scsi_cmd->cmnd;
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char *atapi_buf;
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if (!test_bit(PC_TRANSFORM, &pc->flags))
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return;
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if (drive->media == ide_cdrom || drive->media == ide_optical) {
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if (c[0] == READ_6 || c[0] == WRITE_6) {
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c[8] = c[4]; c[5] = c[3]; c[4] = c[2];
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c[3] = c[1] & 0x1f; c[2] = 0; c[1] &= 0xe0;
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c[0] += (READ_10 - READ_6);
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}
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if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
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unsigned short new_len;
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if (!scsi_buf)
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return;
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if ((atapi_buf = kmalloc(pc->buffer_size + 4, GFP_ATOMIC)) == NULL)
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return;
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memset(atapi_buf, 0, pc->buffer_size + 4);
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memset (c, 0, 12);
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c[0] = sc[0] | 0x40;
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c[1] = sc[1];
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c[2] = sc[2];
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new_len = sc[4] + 4;
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c[8] = new_len;
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c[7] = new_len >> 8;
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c[9] = sc[5];
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if (c[0] == MODE_SELECT_10) {
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atapi_buf[1] = scsi_buf[0]; /* Mode data length */
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atapi_buf[2] = scsi_buf[1]; /* Medium type */
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atapi_buf[3] = scsi_buf[2]; /* Device specific parameter */
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atapi_buf[7] = scsi_buf[3]; /* Block descriptor length */
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memcpy(atapi_buf + 8, scsi_buf + 4, pc->buffer_size - 4);
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}
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pc->buffer = atapi_buf;
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pc->request_transfer += 4;
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pc->buffer_size += 4;
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}
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}
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}
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static inline void idescsi_transform_pc2 (ide_drive_t *drive, idescsi_pc_t *pc)
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{
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u8 *atapi_buf = pc->buffer;
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u8 *sc = pc->scsi_cmd->cmnd;
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u8 *scsi_buf = pc->scsi_cmd->request_buffer;
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if (!test_bit(PC_TRANSFORM, &pc->flags))
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return;
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if (drive->media == ide_cdrom || drive->media == ide_optical) {
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if (pc->c[0] == MODE_SENSE_10 && sc[0] == MODE_SENSE) {
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scsi_buf[0] = atapi_buf[1]; /* Mode data length */
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scsi_buf[1] = atapi_buf[2]; /* Medium type */
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scsi_buf[2] = atapi_buf[3]; /* Device specific parameter */
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scsi_buf[3] = atapi_buf[7]; /* Block descriptor length */
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memcpy(scsi_buf + 4, atapi_buf + 8, pc->request_transfer - 8);
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}
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if (pc->c[0] == INQUIRY) {
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scsi_buf[2] |= 2; /* ansi_revision */
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scsi_buf[3] = (scsi_buf[3] & 0xf0) | 2; /* response data format */
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}
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}
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if (atapi_buf && atapi_buf != scsi_buf)
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kfree(atapi_buf);
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}
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static void hexdump(u8 *x, int len)
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{
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int i;
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printk("[ ");
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for (i = 0; i < len; i++)
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printk("%x ", x[i]);
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printk("]\n");
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}
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static int idescsi_check_condition(ide_drive_t *drive, struct request *failed_command)
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{
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idescsi_scsi_t *scsi = drive_to_idescsi(drive);
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idescsi_pc_t *pc;
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struct request *rq;
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u8 *buf;
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/* stuff a sense request in front of our current request */
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pc = kmalloc (sizeof (idescsi_pc_t), GFP_ATOMIC);
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rq = kmalloc (sizeof (struct request), GFP_ATOMIC);
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buf = kmalloc(SCSI_SENSE_BUFFERSIZE, GFP_ATOMIC);
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if (pc == NULL || rq == NULL || buf == NULL) {
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if (pc) kfree(pc);
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if (rq) kfree(rq);
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if (buf) kfree(buf);
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return -ENOMEM;
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}
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memset (pc, 0, sizeof (idescsi_pc_t));
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memset (buf, 0, SCSI_SENSE_BUFFERSIZE);
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ide_init_drive_cmd(rq);
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rq->special = (char *) pc;
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pc->rq = rq;
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pc->buffer = buf;
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pc->c[0] = REQUEST_SENSE;
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pc->c[4] = pc->request_transfer = pc->buffer_size = SCSI_SENSE_BUFFERSIZE;
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rq->flags = REQ_SENSE;
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pc->timeout = jiffies + WAIT_READY;
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/* NOTE! Save the failed packet command in "rq->buffer" */
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rq->buffer = (void *) failed_command->special;
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pc->scsi_cmd = ((idescsi_pc_t *) failed_command->special)->scsi_cmd;
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if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) {
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printk ("ide-scsi: %s: queue cmd = ", drive->name);
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hexdump(pc->c, 6);
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}
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rq->rq_disk = scsi->disk;
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return ide_do_drive_cmd(drive, rq, ide_preempt);
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}
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static int idescsi_end_request(ide_drive_t *, int, int);
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static ide_startstop_t
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idescsi_atapi_error(ide_drive_t *drive, struct request *rq, u8 stat, u8 err)
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{
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if (HWIF(drive)->INB(IDE_STATUS_REG) & (BUSY_STAT|DRQ_STAT))
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/* force an abort */
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HWIF(drive)->OUTB(WIN_IDLEIMMEDIATE,IDE_COMMAND_REG);
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rq->errors++;
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idescsi_end_request(drive, 0, 0);
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return ide_stopped;
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}
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static ide_startstop_t
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idescsi_atapi_abort(ide_drive_t *drive, struct request *rq)
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{
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#if IDESCSI_DEBUG_LOG
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printk(KERN_WARNING "idescsi_atapi_abort called for %lu\n",
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((idescsi_pc_t *) rq->special)->scsi_cmd->serial_number);
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#endif
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rq->errors |= ERROR_MAX;
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idescsi_end_request(drive, 0, 0);
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return ide_stopped;
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}
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static int idescsi_end_request (ide_drive_t *drive, int uptodate, int nrsecs)
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{
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idescsi_scsi_t *scsi = drive_to_idescsi(drive);
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struct request *rq = HWGROUP(drive)->rq;
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idescsi_pc_t *pc = (idescsi_pc_t *) rq->special;
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int log = test_bit(IDESCSI_LOG_CMD, &scsi->log);
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struct Scsi_Host *host;
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u8 *scsi_buf;
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unsigned long flags;
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if (!(rq->flags & (REQ_SPECIAL|REQ_SENSE))) {
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ide_end_request(drive, uptodate, nrsecs);
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return 0;
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}
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ide_end_drive_cmd (drive, 0, 0);
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if (rq->flags & REQ_SENSE) {
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idescsi_pc_t *opc = (idescsi_pc_t *) rq->buffer;
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if (log) {
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printk ("ide-scsi: %s: wrap up check %lu, rst = ", drive->name, opc->scsi_cmd->serial_number);
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hexdump(pc->buffer,16);
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}
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memcpy((void *) opc->scsi_cmd->sense_buffer, pc->buffer, SCSI_SENSE_BUFFERSIZE);
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kfree(pc->buffer);
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kfree(pc);
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kfree(rq);
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pc = opc;
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rq = pc->rq;
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pc->scsi_cmd->result = (CHECK_CONDITION << 1) |
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((test_bit(PC_TIMEDOUT, &pc->flags)?DID_TIME_OUT:DID_OK) << 16);
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} else if (test_bit(PC_TIMEDOUT, &pc->flags)) {
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if (log)
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printk (KERN_WARNING "ide-scsi: %s: timed out for %lu\n",
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drive->name, pc->scsi_cmd->serial_number);
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pc->scsi_cmd->result = DID_TIME_OUT << 16;
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} else if (rq->errors >= ERROR_MAX) {
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pc->scsi_cmd->result = DID_ERROR << 16;
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if (log)
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printk ("ide-scsi: %s: I/O error for %lu\n", drive->name, pc->scsi_cmd->serial_number);
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} else if (rq->errors) {
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if (log)
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printk ("ide-scsi: %s: check condition for %lu\n", drive->name, pc->scsi_cmd->serial_number);
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if (!idescsi_check_condition(drive, rq))
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/* we started a request sense, so we'll be back, exit for now */
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return 0;
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pc->scsi_cmd->result = (CHECK_CONDITION << 1) | (DID_OK << 16);
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} else {
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pc->scsi_cmd->result = DID_OK << 16;
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idescsi_transform_pc2 (drive, pc);
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if (log) {
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printk ("ide-scsi: %s: suc %lu", drive->name, pc->scsi_cmd->serial_number);
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if (!test_bit(PC_WRITING, &pc->flags) && pc->actually_transferred && pc->actually_transferred <= 1024 && pc->buffer) {
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printk(", rst = ");
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scsi_buf = pc->scsi_cmd->request_buffer;
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hexdump(scsi_buf, min_t(unsigned, 16, pc->scsi_cmd->request_bufflen));
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} else printk("\n");
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}
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}
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host = pc->scsi_cmd->device->host;
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spin_lock_irqsave(host->host_lock, flags);
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pc->done(pc->scsi_cmd);
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spin_unlock_irqrestore(host->host_lock, flags);
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kfree(pc);
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kfree(rq);
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scsi->pc = NULL;
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return 0;
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}
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static inline unsigned long get_timeout(idescsi_pc_t *pc)
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{
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return max_t(unsigned long, WAIT_CMD, pc->timeout - jiffies);
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}
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static int idescsi_expiry(ide_drive_t *drive)
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{
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idescsi_scsi_t *scsi = drive->driver_data;
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idescsi_pc_t *pc = scsi->pc;
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#if IDESCSI_DEBUG_LOG
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printk(KERN_WARNING "idescsi_expiry called for %lu at %lu\n", pc->scsi_cmd->serial_number, jiffies);
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#endif
|
|
set_bit(PC_TIMEDOUT, &pc->flags);
|
|
|
|
return 0; /* we do not want the ide subsystem to retry */
|
|
}
|
|
|
|
/*
|
|
* Our interrupt handler.
|
|
*/
|
|
static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
|
|
{
|
|
idescsi_scsi_t *scsi = drive_to_idescsi(drive);
|
|
idescsi_pc_t *pc=scsi->pc;
|
|
struct request *rq = pc->rq;
|
|
atapi_bcount_t bcount;
|
|
atapi_status_t status;
|
|
atapi_ireason_t ireason;
|
|
atapi_feature_t feature;
|
|
|
|
unsigned int temp;
|
|
|
|
#if IDESCSI_DEBUG_LOG
|
|
printk (KERN_INFO "ide-scsi: Reached idescsi_pc_intr interrupt handler\n");
|
|
#endif /* IDESCSI_DEBUG_LOG */
|
|
|
|
if (test_bit(PC_TIMEDOUT, &pc->flags)){
|
|
#if IDESCSI_DEBUG_LOG
|
|
printk(KERN_WARNING "idescsi_pc_intr: got timed out packet %lu at %lu\n",
|
|
pc->scsi_cmd->serial_number, jiffies);
|
|
#endif
|
|
/* end this request now - scsi should retry it*/
|
|
idescsi_end_request (drive, 1, 0);
|
|
return ide_stopped;
|
|
}
|
|
if (test_and_clear_bit (PC_DMA_IN_PROGRESS, &pc->flags)) {
|
|
#if IDESCSI_DEBUG_LOG
|
|
printk ("ide-scsi: %s: DMA complete\n", drive->name);
|
|
#endif /* IDESCSI_DEBUG_LOG */
|
|
pc->actually_transferred=pc->request_transfer;
|
|
(void) HWIF(drive)->ide_dma_end(drive);
|
|
}
|
|
|
|
feature.all = 0;
|
|
/* Clear the interrupt */
|
|
status.all = HWIF(drive)->INB(IDE_STATUS_REG);
|
|
|
|
if (!status.b.drq) {
|
|
/* No more interrupts */
|
|
if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
|
|
printk (KERN_INFO "Packet command completed, %d bytes transferred\n", pc->actually_transferred);
|
|
local_irq_enable();
|
|
if (status.b.check)
|
|
rq->errors++;
|
|
idescsi_end_request (drive, 1, 0);
|
|
return ide_stopped;
|
|
}
|
|
bcount.b.low = HWIF(drive)->INB(IDE_BCOUNTL_REG);
|
|
bcount.b.high = HWIF(drive)->INB(IDE_BCOUNTH_REG);
|
|
ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
|
|
|
|
if (ireason.b.cod) {
|
|
printk(KERN_ERR "ide-scsi: CoD != 0 in idescsi_pc_intr\n");
|
|
return ide_do_reset (drive);
|
|
}
|
|
if (ireason.b.io) {
|
|
temp = pc->actually_transferred + bcount.all;
|
|
if (temp > pc->request_transfer) {
|
|
if (temp > pc->buffer_size) {
|
|
printk(KERN_ERR "ide-scsi: The scsi wants to "
|
|
"send us more data than expected "
|
|
"- discarding data\n");
|
|
temp = pc->buffer_size - pc->actually_transferred;
|
|
if (temp) {
|
|
clear_bit(PC_WRITING, &pc->flags);
|
|
if (pc->sg)
|
|
idescsi_input_buffers(drive, pc, temp);
|
|
else
|
|
drive->hwif->atapi_input_bytes(drive, pc->current_position, temp);
|
|
printk(KERN_ERR "ide-scsi: transferred %d of %d bytes\n", temp, bcount.all);
|
|
}
|
|
pc->actually_transferred += temp;
|
|
pc->current_position += temp;
|
|
idescsi_discard_data(drive, bcount.all - temp);
|
|
ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc), idescsi_expiry);
|
|
return ide_started;
|
|
}
|
|
#if IDESCSI_DEBUG_LOG
|
|
printk (KERN_NOTICE "ide-scsi: The scsi wants to send us more data than expected - allowing transfer\n");
|
|
#endif /* IDESCSI_DEBUG_LOG */
|
|
}
|
|
}
|
|
if (ireason.b.io) {
|
|
clear_bit(PC_WRITING, &pc->flags);
|
|
if (pc->sg)
|
|
idescsi_input_buffers(drive, pc, bcount.all);
|
|
else
|
|
HWIF(drive)->atapi_input_bytes(drive, pc->current_position, bcount.all);
|
|
} else {
|
|
set_bit(PC_WRITING, &pc->flags);
|
|
if (pc->sg)
|
|
idescsi_output_buffers (drive, pc, bcount.all);
|
|
else
|
|
HWIF(drive)->atapi_output_bytes(drive, pc->current_position, bcount.all);
|
|
}
|
|
/* Update the current position */
|
|
pc->actually_transferred += bcount.all;
|
|
pc->current_position += bcount.all;
|
|
|
|
/* And set the interrupt handler again */
|
|
ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc), idescsi_expiry);
|
|
return ide_started;
|
|
}
|
|
|
|
static ide_startstop_t idescsi_transfer_pc(ide_drive_t *drive)
|
|
{
|
|
ide_hwif_t *hwif = drive->hwif;
|
|
idescsi_scsi_t *scsi = drive_to_idescsi(drive);
|
|
idescsi_pc_t *pc = scsi->pc;
|
|
atapi_ireason_t ireason;
|
|
ide_startstop_t startstop;
|
|
|
|
if (ide_wait_stat(&startstop,drive,DRQ_STAT,BUSY_STAT,WAIT_READY)) {
|
|
printk(KERN_ERR "ide-scsi: Strange, packet command "
|
|
"initiated yet DRQ isn't asserted\n");
|
|
return startstop;
|
|
}
|
|
ireason.all = HWIF(drive)->INB(IDE_IREASON_REG);
|
|
if (!ireason.b.cod || ireason.b.io) {
|
|
printk(KERN_ERR "ide-scsi: (IO,CoD) != (0,1) while "
|
|
"issuing a packet command\n");
|
|
return ide_do_reset (drive);
|
|
}
|
|
if (HWGROUP(drive)->handler != NULL)
|
|
BUG();
|
|
/* Set the interrupt routine */
|
|
ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc), idescsi_expiry);
|
|
/* Send the actual packet */
|
|
drive->hwif->atapi_output_bytes(drive, scsi->pc->c, 12);
|
|
if (test_bit (PC_DMA_OK, &pc->flags)) {
|
|
set_bit (PC_DMA_IN_PROGRESS, &pc->flags);
|
|
hwif->dma_start(drive);
|
|
}
|
|
return ide_started;
|
|
}
|
|
|
|
static inline int idescsi_set_direction(idescsi_pc_t *pc)
|
|
{
|
|
switch (pc->c[0]) {
|
|
case READ_6: case READ_10: case READ_12:
|
|
clear_bit(PC_WRITING, &pc->flags);
|
|
return 0;
|
|
case WRITE_6: case WRITE_10: case WRITE_12:
|
|
set_bit(PC_WRITING, &pc->flags);
|
|
return 0;
|
|
default:
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
static int idescsi_map_sg(ide_drive_t *drive, idescsi_pc_t *pc)
|
|
{
|
|
ide_hwif_t *hwif = drive->hwif;
|
|
struct scatterlist *sg, *scsi_sg;
|
|
int segments;
|
|
|
|
if (!pc->request_transfer || pc->request_transfer % 1024)
|
|
return 1;
|
|
|
|
if (idescsi_set_direction(pc))
|
|
return 1;
|
|
|
|
sg = hwif->sg_table;
|
|
scsi_sg = pc->scsi_cmd->request_buffer;
|
|
segments = pc->scsi_cmd->use_sg;
|
|
|
|
if (segments > hwif->sg_max_nents)
|
|
return 1;
|
|
|
|
if (!segments) {
|
|
hwif->sg_nents = 1;
|
|
sg_init_one(sg, pc->scsi_cmd->request_buffer, pc->request_transfer);
|
|
} else {
|
|
hwif->sg_nents = segments;
|
|
memcpy(sg, scsi_sg, sizeof(*sg) * segments);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Issue a packet command
|
|
*/
|
|
static ide_startstop_t idescsi_issue_pc (ide_drive_t *drive, idescsi_pc_t *pc)
|
|
{
|
|
idescsi_scsi_t *scsi = drive_to_idescsi(drive);
|
|
ide_hwif_t *hwif = drive->hwif;
|
|
atapi_feature_t feature;
|
|
atapi_bcount_t bcount;
|
|
|
|
scsi->pc=pc; /* Set the current packet command */
|
|
pc->actually_transferred=0; /* We haven't transferred any data yet */
|
|
pc->current_position=pc->buffer;
|
|
bcount.all = min(pc->request_transfer, 63 * 1024); /* Request to transfer the entire buffer at once */
|
|
|
|
feature.all = 0;
|
|
if (drive->using_dma && !idescsi_map_sg(drive, pc)) {
|
|
hwif->sg_mapped = 1;
|
|
feature.b.dma = !hwif->dma_setup(drive);
|
|
hwif->sg_mapped = 0;
|
|
}
|
|
|
|
SELECT_DRIVE(drive);
|
|
if (IDE_CONTROL_REG)
|
|
HWIF(drive)->OUTB(drive->ctl, IDE_CONTROL_REG);
|
|
|
|
HWIF(drive)->OUTB(feature.all, IDE_FEATURE_REG);
|
|
HWIF(drive)->OUTB(bcount.b.high, IDE_BCOUNTH_REG);
|
|
HWIF(drive)->OUTB(bcount.b.low, IDE_BCOUNTL_REG);
|
|
|
|
if (feature.b.dma)
|
|
set_bit(PC_DMA_OK, &pc->flags);
|
|
|
|
if (test_bit(IDESCSI_DRQ_INTERRUPT, &scsi->flags)) {
|
|
if (HWGROUP(drive)->handler != NULL)
|
|
BUG();
|
|
ide_set_handler(drive, &idescsi_transfer_pc,
|
|
get_timeout(pc), idescsi_expiry);
|
|
/* Issue the packet command */
|
|
HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
|
|
return ide_started;
|
|
} else {
|
|
/* Issue the packet command */
|
|
HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
|
|
return idescsi_transfer_pc(drive);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* idescsi_do_request is our request handling function.
|
|
*/
|
|
static ide_startstop_t idescsi_do_request (ide_drive_t *drive, struct request *rq, sector_t block)
|
|
{
|
|
#if IDESCSI_DEBUG_LOG
|
|
printk (KERN_INFO "rq_status: %d, dev: %s, cmd: %x, errors: %d\n",rq->rq_status, rq->rq_disk->disk_name,rq->cmd[0],rq->errors);
|
|
printk (KERN_INFO "sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n",rq->sector,rq->nr_sectors,rq->current_nr_sectors);
|
|
#endif /* IDESCSI_DEBUG_LOG */
|
|
|
|
if (rq->flags & (REQ_SPECIAL|REQ_SENSE)) {
|
|
return idescsi_issue_pc (drive, (idescsi_pc_t *) rq->special);
|
|
}
|
|
blk_dump_rq_flags(rq, "ide-scsi: unsup command");
|
|
idescsi_end_request (drive, 0, 0);
|
|
return ide_stopped;
|
|
}
|
|
|
|
static void idescsi_add_settings(ide_drive_t *drive)
|
|
{
|
|
idescsi_scsi_t *scsi = drive_to_idescsi(drive);
|
|
|
|
/*
|
|
* drive setting name read/write ioctl ioctl data type min max mul_factor div_factor data pointer set function
|
|
*/
|
|
ide_add_setting(drive, "bios_cyl", SETTING_RW, -1, -1, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL);
|
|
ide_add_setting(drive, "bios_head", SETTING_RW, -1, -1, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL);
|
|
ide_add_setting(drive, "bios_sect", SETTING_RW, -1, -1, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL);
|
|
ide_add_setting(drive, "transform", SETTING_RW, -1, -1, TYPE_INT, 0, 3, 1, 1, &scsi->transform, NULL);
|
|
ide_add_setting(drive, "log", SETTING_RW, -1, -1, TYPE_INT, 0, 1, 1, 1, &scsi->log, NULL);
|
|
}
|
|
|
|
/*
|
|
* Driver initialization.
|
|
*/
|
|
static void idescsi_setup (ide_drive_t *drive, idescsi_scsi_t *scsi)
|
|
{
|
|
DRIVER(drive)->busy++;
|
|
if (drive->id && (drive->id->config & 0x0060) == 0x20)
|
|
set_bit (IDESCSI_DRQ_INTERRUPT, &scsi->flags);
|
|
set_bit(IDESCSI_TRANSFORM, &scsi->transform);
|
|
clear_bit(IDESCSI_SG_TRANSFORM, &scsi->transform);
|
|
#if IDESCSI_DEBUG_LOG
|
|
set_bit(IDESCSI_LOG_CMD, &scsi->log);
|
|
#endif /* IDESCSI_DEBUG_LOG */
|
|
idescsi_add_settings(drive);
|
|
DRIVER(drive)->busy--;
|
|
}
|
|
|
|
static int idescsi_cleanup (ide_drive_t *drive)
|
|
{
|
|
struct Scsi_Host *scsihost = drive->driver_data;
|
|
struct ide_scsi_obj *scsi = scsihost_to_idescsi(scsihost);
|
|
struct gendisk *g = scsi->disk;
|
|
|
|
if (ide_unregister_subdriver(drive))
|
|
return 1;
|
|
|
|
ide_unregister_region(g);
|
|
|
|
drive->driver_data = NULL;
|
|
g->private_data = NULL;
|
|
put_disk(g);
|
|
|
|
scsi_remove_host(scsihost);
|
|
ide_scsi_put(scsi);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int idescsi_attach(ide_drive_t *drive);
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
static ide_proc_entry_t idescsi_proc[] = {
|
|
{ "capacity", S_IFREG|S_IRUGO, proc_ide_read_capacity, NULL },
|
|
{ NULL, 0, NULL, NULL }
|
|
};
|
|
#else
|
|
# define idescsi_proc NULL
|
|
#endif
|
|
|
|
/*
|
|
* IDE subdriver functions, registered with ide.c
|
|
*/
|
|
static ide_driver_t idescsi_driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "ide-scsi",
|
|
.version = IDESCSI_VERSION,
|
|
.media = ide_scsi,
|
|
.busy = 0,
|
|
.supports_dsc_overlap = 0,
|
|
.proc = idescsi_proc,
|
|
.attach = idescsi_attach,
|
|
.cleanup = idescsi_cleanup,
|
|
.do_request = idescsi_do_request,
|
|
.end_request = idescsi_end_request,
|
|
.error = idescsi_atapi_error,
|
|
.abort = idescsi_atapi_abort,
|
|
.drives = LIST_HEAD_INIT(idescsi_driver.drives),
|
|
};
|
|
|
|
static int idescsi_ide_open(struct inode *inode, struct file *filp)
|
|
{
|
|
struct gendisk *disk = inode->i_bdev->bd_disk;
|
|
struct ide_scsi_obj *scsi;
|
|
ide_drive_t *drive;
|
|
|
|
if (!(scsi = ide_scsi_get(disk)))
|
|
return -ENXIO;
|
|
|
|
drive = scsi->drive;
|
|
|
|
drive->usage++;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int idescsi_ide_release(struct inode *inode, struct file *filp)
|
|
{
|
|
struct gendisk *disk = inode->i_bdev->bd_disk;
|
|
struct ide_scsi_obj *scsi = ide_scsi_g(disk);
|
|
ide_drive_t *drive = scsi->drive;
|
|
|
|
drive->usage--;
|
|
|
|
ide_scsi_put(scsi);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int idescsi_ide_ioctl(struct inode *inode, struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct block_device *bdev = inode->i_bdev;
|
|
struct ide_scsi_obj *scsi = ide_scsi_g(bdev->bd_disk);
|
|
return generic_ide_ioctl(scsi->drive, file, bdev, cmd, arg);
|
|
}
|
|
|
|
static struct block_device_operations idescsi_ops = {
|
|
.owner = THIS_MODULE,
|
|
.open = idescsi_ide_open,
|
|
.release = idescsi_ide_release,
|
|
.ioctl = idescsi_ide_ioctl,
|
|
};
|
|
|
|
static int idescsi_attach(ide_drive_t *drive);
|
|
|
|
static int idescsi_slave_configure(struct scsi_device * sdp)
|
|
{
|
|
/* Configure detected device */
|
|
scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, sdp->host->cmd_per_lun);
|
|
return 0;
|
|
}
|
|
|
|
static const char *idescsi_info (struct Scsi_Host *host)
|
|
{
|
|
return "SCSI host adapter emulation for IDE ATAPI devices";
|
|
}
|
|
|
|
static int idescsi_ioctl (struct scsi_device *dev, int cmd, void __user *arg)
|
|
{
|
|
idescsi_scsi_t *scsi = scsihost_to_idescsi(dev->host);
|
|
|
|
if (cmd == SG_SET_TRANSFORM) {
|
|
if (arg)
|
|
set_bit(IDESCSI_SG_TRANSFORM, &scsi->transform);
|
|
else
|
|
clear_bit(IDESCSI_SG_TRANSFORM, &scsi->transform);
|
|
return 0;
|
|
} else if (cmd == SG_GET_TRANSFORM)
|
|
return put_user(test_bit(IDESCSI_SG_TRANSFORM, &scsi->transform), (int __user *) arg);
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline int should_transform(ide_drive_t *drive, struct scsi_cmnd *cmd)
|
|
{
|
|
idescsi_scsi_t *scsi = drive_to_idescsi(drive);
|
|
|
|
/* this was a layering violation and we can't support it
|
|
anymore, sorry. */
|
|
#if 0
|
|
struct gendisk *disk = cmd->request->rq_disk;
|
|
|
|
if (disk) {
|
|
struct Scsi_Device_Template **p = disk->private_data;
|
|
if (strcmp((*p)->scsi_driverfs_driver.name, "sg") == 0)
|
|
return test_bit(IDESCSI_SG_TRANSFORM, &scsi->transform);
|
|
}
|
|
#endif
|
|
return test_bit(IDESCSI_TRANSFORM, &scsi->transform);
|
|
}
|
|
|
|
static int idescsi_queue (struct scsi_cmnd *cmd,
|
|
void (*done)(struct scsi_cmnd *))
|
|
{
|
|
struct Scsi_Host *host = cmd->device->host;
|
|
idescsi_scsi_t *scsi = scsihost_to_idescsi(host);
|
|
ide_drive_t *drive = scsi->drive;
|
|
struct request *rq = NULL;
|
|
idescsi_pc_t *pc = NULL;
|
|
|
|
if (!drive) {
|
|
printk (KERN_ERR "ide-scsi: drive id %d not present\n", cmd->device->id);
|
|
goto abort;
|
|
}
|
|
scsi = drive_to_idescsi(drive);
|
|
pc = kmalloc (sizeof (idescsi_pc_t), GFP_ATOMIC);
|
|
rq = kmalloc (sizeof (struct request), GFP_ATOMIC);
|
|
if (rq == NULL || pc == NULL) {
|
|
printk (KERN_ERR "ide-scsi: %s: out of memory\n", drive->name);
|
|
goto abort;
|
|
}
|
|
|
|
memset (pc->c, 0, 12);
|
|
pc->flags = 0;
|
|
pc->rq = rq;
|
|
memcpy (pc->c, cmd->cmnd, cmd->cmd_len);
|
|
if (cmd->use_sg) {
|
|
pc->buffer = NULL;
|
|
pc->sg = cmd->request_buffer;
|
|
} else {
|
|
pc->buffer = cmd->request_buffer;
|
|
pc->sg = NULL;
|
|
}
|
|
pc->b_count = 0;
|
|
pc->request_transfer = pc->buffer_size = cmd->request_bufflen;
|
|
pc->scsi_cmd = cmd;
|
|
pc->done = done;
|
|
pc->timeout = jiffies + cmd->timeout_per_command;
|
|
|
|
if (should_transform(drive, cmd))
|
|
set_bit(PC_TRANSFORM, &pc->flags);
|
|
idescsi_transform_pc1 (drive, pc);
|
|
|
|
if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) {
|
|
printk ("ide-scsi: %s: que %lu, cmd = ", drive->name, cmd->serial_number);
|
|
hexdump(cmd->cmnd, cmd->cmd_len);
|
|
if (memcmp(pc->c, cmd->cmnd, cmd->cmd_len)) {
|
|
printk ("ide-scsi: %s: que %lu, tsl = ", drive->name, cmd->serial_number);
|
|
hexdump(pc->c, 12);
|
|
}
|
|
}
|
|
|
|
ide_init_drive_cmd (rq);
|
|
rq->special = (char *) pc;
|
|
rq->flags = REQ_SPECIAL;
|
|
spin_unlock_irq(host->host_lock);
|
|
rq->rq_disk = scsi->disk;
|
|
(void) ide_do_drive_cmd (drive, rq, ide_end);
|
|
spin_lock_irq(host->host_lock);
|
|
return 0;
|
|
abort:
|
|
if (pc) kfree (pc);
|
|
if (rq) kfree (rq);
|
|
cmd->result = DID_ERROR << 16;
|
|
done(cmd);
|
|
return 0;
|
|
}
|
|
|
|
static int idescsi_eh_abort (struct scsi_cmnd *cmd)
|
|
{
|
|
idescsi_scsi_t *scsi = scsihost_to_idescsi(cmd->device->host);
|
|
ide_drive_t *drive = scsi->drive;
|
|
int busy;
|
|
int ret = FAILED;
|
|
|
|
/* In idescsi_eh_abort we try to gently pry our command from the ide subsystem */
|
|
|
|
if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
|
|
printk (KERN_WARNING "ide-scsi: abort called for %lu\n", cmd->serial_number);
|
|
|
|
if (!drive) {
|
|
printk (KERN_WARNING "ide-scsi: Drive not set in idescsi_eh_abort\n");
|
|
WARN_ON(1);
|
|
goto no_drive;
|
|
}
|
|
|
|
/* First give it some more time, how much is "right" is hard to say :-( */
|
|
|
|
busy = ide_wait_not_busy(HWIF(drive), 100); /* FIXME - uses mdelay which causes latency? */
|
|
if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
|
|
printk (KERN_WARNING "ide-scsi: drive did%s become ready\n", busy?" not":"");
|
|
|
|
spin_lock_irq(&ide_lock);
|
|
|
|
/* If there is no pc running we're done (our interrupt took care of it) */
|
|
if (!scsi->pc) {
|
|
ret = SUCCESS;
|
|
goto ide_unlock;
|
|
}
|
|
|
|
/* It's somewhere in flight. Does ide subsystem agree? */
|
|
if (scsi->pc->scsi_cmd->serial_number == cmd->serial_number && !busy &&
|
|
elv_queue_empty(drive->queue) && HWGROUP(drive)->rq != scsi->pc->rq) {
|
|
/*
|
|
* FIXME - not sure this condition can ever occur
|
|
*/
|
|
printk (KERN_ERR "ide-scsi: cmd aborted!\n");
|
|
|
|
if (scsi->pc->rq->flags & REQ_SENSE)
|
|
kfree(scsi->pc->buffer);
|
|
kfree(scsi->pc->rq);
|
|
kfree(scsi->pc);
|
|
scsi->pc = NULL;
|
|
|
|
ret = SUCCESS;
|
|
}
|
|
|
|
ide_unlock:
|
|
spin_unlock_irq(&ide_lock);
|
|
no_drive:
|
|
if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
|
|
printk (KERN_WARNING "ide-scsi: abort returns %s\n", ret == SUCCESS?"success":"failed");
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int idescsi_eh_reset (struct scsi_cmnd *cmd)
|
|
{
|
|
struct request *req;
|
|
idescsi_scsi_t *scsi = scsihost_to_idescsi(cmd->device->host);
|
|
ide_drive_t *drive = scsi->drive;
|
|
int ready = 0;
|
|
int ret = SUCCESS;
|
|
|
|
/* In idescsi_eh_reset we forcefully remove the command from the ide subsystem and reset the device. */
|
|
|
|
if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
|
|
printk (KERN_WARNING "ide-scsi: reset called for %lu\n", cmd->serial_number);
|
|
|
|
if (!drive) {
|
|
printk (KERN_WARNING "ide-scsi: Drive not set in idescsi_eh_reset\n");
|
|
WARN_ON(1);
|
|
return FAILED;
|
|
}
|
|
|
|
spin_lock_irq(&ide_lock);
|
|
|
|
if (!scsi->pc || (req = scsi->pc->rq) != HWGROUP(drive)->rq || !HWGROUP(drive)->handler) {
|
|
printk (KERN_WARNING "ide-scsi: No active request in idescsi_eh_reset\n");
|
|
spin_unlock(&ide_lock);
|
|
return FAILED;
|
|
}
|
|
|
|
/* kill current request */
|
|
blkdev_dequeue_request(req);
|
|
end_that_request_last(req);
|
|
if (req->flags & REQ_SENSE)
|
|
kfree(scsi->pc->buffer);
|
|
kfree(scsi->pc);
|
|
scsi->pc = NULL;
|
|
kfree(req);
|
|
|
|
/* now nuke the drive queue */
|
|
while ((req = elv_next_request(drive->queue))) {
|
|
blkdev_dequeue_request(req);
|
|
end_that_request_last(req);
|
|
}
|
|
|
|
HWGROUP(drive)->rq = NULL;
|
|
HWGROUP(drive)->handler = NULL;
|
|
HWGROUP(drive)->busy = 1; /* will set this to zero when ide reset finished */
|
|
spin_unlock_irq(&ide_lock);
|
|
|
|
ide_do_reset(drive);
|
|
|
|
/* ide_do_reset starts a polling handler which restarts itself every 50ms until the reset finishes */
|
|
|
|
do {
|
|
set_current_state(TASK_UNINTERRUPTIBLE);
|
|
spin_unlock_irq(cmd->device->host->host_lock);
|
|
schedule_timeout(HZ/20);
|
|
spin_lock_irq(cmd->device->host->host_lock);
|
|
} while ( HWGROUP(drive)->handler );
|
|
|
|
ready = drive_is_ready(drive);
|
|
HWGROUP(drive)->busy--;
|
|
if (!ready) {
|
|
printk (KERN_ERR "ide-scsi: reset failed!\n");
|
|
ret = FAILED;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int idescsi_bios(struct scsi_device *sdev, struct block_device *bdev,
|
|
sector_t capacity, int *parm)
|
|
{
|
|
idescsi_scsi_t *idescsi = scsihost_to_idescsi(sdev->host);
|
|
ide_drive_t *drive = idescsi->drive;
|
|
|
|
if (drive->bios_cyl && drive->bios_head && drive->bios_sect) {
|
|
parm[0] = drive->bios_head;
|
|
parm[1] = drive->bios_sect;
|
|
parm[2] = drive->bios_cyl;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static struct scsi_host_template idescsi_template = {
|
|
.module = THIS_MODULE,
|
|
.name = "idescsi",
|
|
.info = idescsi_info,
|
|
.slave_configure = idescsi_slave_configure,
|
|
.ioctl = idescsi_ioctl,
|
|
.queuecommand = idescsi_queue,
|
|
.eh_abort_handler = idescsi_eh_abort,
|
|
.eh_host_reset_handler = idescsi_eh_reset,
|
|
.bios_param = idescsi_bios,
|
|
.can_queue = 40,
|
|
.this_id = -1,
|
|
.sg_tablesize = 256,
|
|
.cmd_per_lun = 5,
|
|
.max_sectors = 128,
|
|
.use_clustering = DISABLE_CLUSTERING,
|
|
.emulated = 1,
|
|
.proc_name = "ide-scsi",
|
|
};
|
|
|
|
static int idescsi_attach(ide_drive_t *drive)
|
|
{
|
|
idescsi_scsi_t *idescsi;
|
|
struct Scsi_Host *host;
|
|
struct gendisk *g;
|
|
static int warned;
|
|
int err = -ENOMEM;
|
|
|
|
if (!warned && drive->media == ide_cdrom) {
|
|
printk(KERN_WARNING "ide-scsi is deprecated for cd burning! Use ide-cd and give dev=/dev/hdX as device\n");
|
|
warned = 1;
|
|
}
|
|
|
|
if (!strstr("ide-scsi", drive->driver_req) ||
|
|
!drive->present ||
|
|
drive->media == ide_disk ||
|
|
!(host = scsi_host_alloc(&idescsi_template,sizeof(idescsi_scsi_t))))
|
|
return 1;
|
|
|
|
g = alloc_disk(1 << PARTN_BITS);
|
|
if (!g)
|
|
goto out_host_put;
|
|
|
|
ide_init_disk(g, drive);
|
|
|
|
host->max_id = 1;
|
|
|
|
#if IDESCSI_DEBUG_LOG
|
|
if (drive->id->last_lun)
|
|
printk(KERN_NOTICE "%s: id->last_lun=%u\n", drive->name, drive->id->last_lun);
|
|
#endif
|
|
if ((drive->id->last_lun & 0x7) != 7)
|
|
host->max_lun = (drive->id->last_lun & 0x7) + 1;
|
|
else
|
|
host->max_lun = 1;
|
|
|
|
drive->driver_data = host;
|
|
idescsi = scsihost_to_idescsi(host);
|
|
idescsi->drive = drive;
|
|
idescsi->driver = &idescsi_driver;
|
|
idescsi->host = host;
|
|
idescsi->disk = g;
|
|
g->private_data = &idescsi->driver;
|
|
err = ide_register_subdriver(drive, &idescsi_driver);
|
|
if (!err) {
|
|
idescsi_setup (drive, idescsi);
|
|
g->fops = &idescsi_ops;
|
|
ide_register_region(g);
|
|
err = scsi_add_host(host, &drive->gendev);
|
|
if (!err) {
|
|
scsi_scan_host(host);
|
|
return 0;
|
|
}
|
|
/* fall through on error */
|
|
ide_unregister_region(g);
|
|
ide_unregister_subdriver(drive);
|
|
}
|
|
|
|
put_disk(g);
|
|
out_host_put:
|
|
scsi_host_put(host);
|
|
return err;
|
|
}
|
|
|
|
static int __init init_idescsi_module(void)
|
|
{
|
|
return ide_register_driver(&idescsi_driver);
|
|
}
|
|
|
|
static void __exit exit_idescsi_module(void)
|
|
{
|
|
ide_unregister_driver(&idescsi_driver);
|
|
}
|
|
|
|
module_init(init_idescsi_module);
|
|
module_exit(exit_idescsi_module);
|
|
MODULE_LICENSE("GPL");
|