# This is a BitKeeper generated patch for the following project: # Project Name: Linux kernel tree # This patch format is intended for GNU patch command version 2.5 or higher. # This patch includes the following deltas: # ChangeSet 1.634 -> 1.635 # drivers/scsi/Makefile 1.23 -> 1.24 # (new) -> 1.1 drivers/scsi/ide-scsi24.c # # The following is the BitKeeper ChangeSet Log # -------------------------------------------- # 02/07/09 axboe@burns.home.kernel.dk 1.635 # Add 2.4 ide-scsi version # -------------------------------------------- # diff -Nru a/drivers/scsi/Makefile b/drivers/scsi/Makefile --- a/drivers/scsi/Makefile Tue Jul 9 12:11:01 2002 +++ b/drivers/scsi/Makefile Tue Jul 9 12:11:01 2002 @@ -97,6 +97,7 @@ obj-$(CONFIG_SCSI_INIA100) += a100u2w.o obj-$(CONFIG_SCSI_QLOGICPTI) += qlogicpti.o obj-$(CONFIG_BLK_DEV_IDESCSI) += ide-scsi.o +obj-$(CONFIG_BLK_DEV_IDESCSI_24) += ide-scsi24.o obj-$(CONFIG_SCSI_MESH) += mesh.o obj-$(CONFIG_SCSI_MAC53C94) += mac53c94.o obj-$(CONFIG_SCSI_PLUTO) += pluto.o @@ -159,4 +160,4 @@ $(obj)/53c700_d.h: $(src)/53c700.scr $(src)/script_asm.pl $(PERL) -s $(src)/script_asm.pl -ncr7x0_family $@ $(@:_d.h=_u.h) < $< -endif \ No newline at end of file +endif diff -Nru a/drivers/scsi/ide-scsi24.c b/drivers/scsi/ide-scsi24.c --- /dev/null Wed Dec 31 16:00:00 1969 +++ b/drivers/scsi/ide-scsi24.c Tue Jul 9 12:11:01 2002 @@ -0,0 +1,880 @@ +/* + * linux/drivers/scsi/ide-scsi.c Version 0.9 Jul 4, 1999 + * + * Copyright (C) 1996 - 1999 Gadi Oxman + */ + +/* + * Emulation of a SCSI host adapter for IDE ATAPI devices. + * + * With this driver, one can use the Linux SCSI drivers instead of the + * native IDE ATAPI drivers. + * + * Ver 0.1 Dec 3 96 Initial version. + * Ver 0.2 Jan 26 97 Fixed bug in cleanup_module() and added emulation + * of MODE_SENSE_6/MODE_SELECT_6 for cdroms. Thanks + * to Janos Farkas for pointing this out. + * Avoid using bitfields in structures for m68k. + * Added Scatter/Gather and DMA support. + * Ver 0.4 Dec 7 97 Add support for ATAPI PD/CD drives. + * Use variable timeout for each command. + * Ver 0.5 Jan 2 98 Fix previous PD/CD support. + * Allow disabling of SCSI-6 to SCSI-10 transformation. + * Ver 0.6 Jan 27 98 Allow disabling of SCSI command translation layer + * for access through /dev/sg. + * Fix MODE_SENSE_6/MODE_SELECT_6/INQUIRY translation. + * Ver 0.7 Dec 04 98 Ignore commands where lun != 0 to avoid multiple + * detection of devices with CONFIG_SCSI_MULTI_LUN + * Ver 0.8 Feb 05 99 Optical media need translation too. Reverse 0.7. + * Ver 0.9 Jul 04 99 Fix a bug in SG_SET_TRANSFORM. + */ + +#define IDESCSI_VERSION "0.9" + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#include "scsi.h" +#include "hosts.h" +#include "sd.h" +#include + +#define IDESCSI_DEBUG_LOG 0 + +typedef struct idescsi_pc_s { + u8 c[12]; /* Actual packet bytes */ + int request_transfer; /* Bytes to transfer */ + int actually_transferred; /* Bytes actually transferred */ + int buffer_size; /* Size of our data buffer */ + struct request *rq; /* The corresponding request */ + byte *buffer; /* Data buffer */ + byte *current_position; /* Pointer into the above buffer */ + struct scatterlist *sg; /* Scatter gather table */ + int b_count; /* Bytes transferred from current entry */ + Scsi_Cmnd *scsi_cmd; /* SCSI command */ + void (*done)(Scsi_Cmnd *); /* Scsi completion routine */ + unsigned long flags; /* Status/Action flags */ + unsigned long timeout; /* Command timeout */ +} idescsi_pc_t; + +/* + * Packet command status bits. + */ +#define PC_DMA_IN_PROGRESS 0 /* 1 while DMA in progress */ +#define PC_WRITING 1 /* Data direction */ +#define PC_TRANSFORM 2 /* transform SCSI commands */ + +/* + * SCSI command transformation layer + */ +#define IDESCSI_TRANSFORM 0 /* Enable/Disable transformation */ +#define IDESCSI_SG_TRANSFORM 1 /* /dev/sg transformation */ + +/* + * Log flags + */ +#define IDESCSI_LOG_CMD 0 /* Log SCSI commands */ + +typedef struct { + ide_drive_t *drive; + idescsi_pc_t *pc; /* Current packet command */ + unsigned long flags; /* Status/Action flags */ + unsigned long transform; /* SCSI cmd translation layer */ + unsigned long log; /* log flags */ +} idescsi_scsi_t; + +/* + * Per ATAPI device status bits. + */ +#define IDESCSI_DRQ_INTERRUPT 0 /* DRQ interrupt device */ + +/* + * ide-scsi requests. + */ +#define IDESCSI_PC_RQ 90 + +/* + * Bits of the interrupt reason register. + */ +#define IDESCSI_IREASON_COD 0x1 /* Information transferred is command */ +#define IDESCSI_IREASON_IO 0x2 /* The device requests us to read */ + +static void idescsi_discard_data (ide_drive_t *drive, unsigned int bcount) +{ + while (bcount--) + IN_BYTE (IDE_DATA_REG); +} + +static void idescsi_output_zeros (ide_drive_t *drive, unsigned int bcount) +{ + while (bcount--) + OUT_BYTE (0, IDE_DATA_REG); +} + +/* + * PIO data transfer routines using the scatter gather table. + */ +static void idescsi_input_buffers (ide_drive_t *drive, idescsi_pc_t *pc, unsigned int bcount) +{ + int count; + char *buf; + + while (bcount) { + if (pc->sg - (struct scatterlist *) pc->scsi_cmd->request_buffer > pc->scsi_cmd->use_sg) { + printk (KERN_ERR "ide-scsi: scatter gather table too small, discarding data\n"); + idescsi_discard_data (drive, bcount); + return; + } + count = IDE_MIN (pc->sg->length - pc->b_count, bcount); + buf = page_address(pc->sg->page) + pc->sg->offset; + atapi_input_bytes (drive, buf + pc->b_count, count); + bcount -= count; pc->b_count += count; + if (pc->b_count == pc->sg->length) { + pc->sg++; + pc->b_count = 0; + } + } +} + +static void idescsi_output_buffers (ide_drive_t *drive, idescsi_pc_t *pc, unsigned int bcount) +{ + int count; + char *buf; + + while (bcount) { + if (pc->sg - (struct scatterlist *) pc->scsi_cmd->request_buffer > pc->scsi_cmd->use_sg) { + printk (KERN_ERR "ide-scsi: scatter gather table too small, padding with zeros\n"); + idescsi_output_zeros (drive, bcount); + return; + } + count = IDE_MIN (pc->sg->length - pc->b_count, bcount); + buf = page_address(pc->sg->page) + pc->sg->offset; + atapi_output_bytes (drive, buf + pc->b_count, count); + bcount -= count; pc->b_count += count; + if (pc->b_count == pc->sg->length) { + pc->sg++; + pc->b_count = 0; + } + } +} + +/* + * Most of the SCSI commands are supported directly by ATAPI devices. + * idescsi_transform_pc handles the few exceptions. + */ +static inline void idescsi_transform_pc1 (ide_drive_t *drive, idescsi_pc_t *pc) +{ + u8 *c = pc->c, *scsi_buf = pc->buffer, *sc = pc->scsi_cmd->cmnd; + char *atapi_buf; + + if (!test_bit(PC_TRANSFORM, &pc->flags)) + return; + if (drive->media == ide_cdrom || drive->media == ide_optical) { + if (c[0] == READ_6 || c[0] == WRITE_6) { + c[8] = c[4]; c[5] = c[3]; c[4] = c[2]; + c[3] = c[1] & 0x1f; c[2] = 0; c[1] &= 0xe0; + c[0] += (READ_10 - READ_6); + } + if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) { + if (!scsi_buf) + return; + if ((atapi_buf = kmalloc(pc->buffer_size + 4, GFP_ATOMIC)) == NULL) + return; + memset(atapi_buf, 0, pc->buffer_size + 4); + memset (c, 0, 12); + c[0] = sc[0] | 0x40; c[1] = sc[1]; c[2] = sc[2]; + c[8] = sc[4] + 4; c[9] = sc[5]; + if (sc[4] + 4 > 255) + c[7] = sc[4] + 4 - 255; + if (c[0] == MODE_SELECT_10) { + atapi_buf[1] = scsi_buf[0]; /* Mode data length */ + atapi_buf[2] = scsi_buf[1]; /* Medium type */ + atapi_buf[3] = scsi_buf[2]; /* Device specific parameter */ + atapi_buf[7] = scsi_buf[3]; /* Block descriptor length */ + memcpy(atapi_buf + 8, scsi_buf + 4, pc->buffer_size - 4); + } + pc->buffer = atapi_buf; + pc->request_transfer += 4; + pc->buffer_size += 4; + } + } +} + +static inline void idescsi_transform_pc2 (ide_drive_t *drive, idescsi_pc_t *pc) +{ + u8 *atapi_buf = pc->buffer; + u8 *sc = pc->scsi_cmd->cmnd; + u8 *scsi_buf = pc->scsi_cmd->request_buffer; + + if (!test_bit(PC_TRANSFORM, &pc->flags)) + return; + if (drive->media == ide_cdrom || drive->media == ide_optical) { + if (pc->c[0] == MODE_SENSE_10 && sc[0] == MODE_SENSE) { + scsi_buf[0] = atapi_buf[1]; /* Mode data length */ + scsi_buf[1] = atapi_buf[2]; /* Medium type */ + scsi_buf[2] = atapi_buf[3]; /* Device specific parameter */ + scsi_buf[3] = atapi_buf[7]; /* Block descriptor length */ + memcpy(scsi_buf + 4, atapi_buf + 8, pc->request_transfer - 8); + } + if (pc->c[0] == INQUIRY) { + scsi_buf[2] |= 2; /* ansi_revision */ + scsi_buf[3] = (scsi_buf[3] & 0xf0) | 2; /* response data format */ + } + } + if (atapi_buf && atapi_buf != scsi_buf) + kfree(atapi_buf); +} + +static inline void idescsi_free_bio (struct bio *bio) +{ + struct bio *bhp; + + while (bio) { + bhp = bio; + bio = bio->bi_next; + bio_put(bhp); + } +} + +static void hexdump(u8 *x, int len) +{ + int i; + + printk("[ "); + for (i = 0; i < len; i++) + printk("%x ", x[i]); + printk("]\n"); +} + +static int idescsi_end_request (ide_drive_t *drive, int uptodate) +{ + idescsi_scsi_t *scsi = drive->driver_data; + struct request *rq = HWGROUP(drive)->rq; + idescsi_pc_t *pc = (idescsi_pc_t *) rq->special; + int log = test_bit(IDESCSI_LOG_CMD, &scsi->log); + struct Scsi_Host *host; + u8 *scsi_buf; + unsigned long flags; + + if (!(rq->flags & REQ_SPECIAL)) { + ide_end_request(drive, uptodate); + return 0; + } + ide_end_drive_cmd (drive, 0, 0); + if (rq->errors >= ERROR_MAX) { + pc->scsi_cmd->result = DID_ERROR << 16; + if (log) + printk ("ide-scsi: %s: I/O error for %lu\n", drive->name, pc->scsi_cmd->serial_number); + } else if (rq->errors) { + pc->scsi_cmd->result = (CHECK_CONDITION << 1) | (DID_OK << 16); + if (log) + printk ("ide-scsi: %s: check condition for %lu\n", drive->name, pc->scsi_cmd->serial_number); + } else { + pc->scsi_cmd->result = DID_OK << 16; + idescsi_transform_pc2 (drive, pc); + if (log) { + printk ("ide-scsi: %s: suc %lu", drive->name, pc->scsi_cmd->serial_number); + if (!test_bit(PC_WRITING, &pc->flags) && pc->actually_transferred && pc->actually_transferred <= 1024 && pc->buffer) { + printk(", rst = "); + scsi_buf = pc->scsi_cmd->request_buffer; + hexdump(scsi_buf, IDE_MIN(16, pc->scsi_cmd->request_bufflen)); + } else printk("\n"); + } + } + host = pc->scsi_cmd->host; + spin_lock_irqsave(host->host_lock, flags); + pc->done(pc->scsi_cmd); + spin_unlock_irqrestore(host->host_lock, flags); + idescsi_free_bio (rq->bio); + kfree(pc); kfree(rq); + scsi->pc = NULL; + return 0; +} + +static inline unsigned long get_timeout(idescsi_pc_t *pc) +{ + return IDE_MAX(WAIT_CMD, pc->timeout - jiffies); +} + +/* + * Our interrupt handler. + */ +static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive) +{ + idescsi_scsi_t *scsi = drive->driver_data; + byte status, ireason; + int bcount; + idescsi_pc_t *pc=scsi->pc; + struct request *rq = pc->rq; + 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_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)->dmaproc(ide_dma_end, drive)); + } + + status = GET_STAT(); /* Clear the interrupt */ + + if ((status & DRQ_STAT) == 0) { /* No more interrupts */ + if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) + printk (KERN_INFO "Packet command completed, %d bytes transferred\n", pc->actually_transferred); + ide__sti(); + if (status & ERR_STAT) + rq->errors++; + idescsi_end_request (drive, 1); + return ide_stopped; + } + bcount = IN_BYTE (IDE_BCOUNTH_REG) << 8 | IN_BYTE (IDE_BCOUNTL_REG); + ireason = IN_BYTE (IDE_IREASON_REG); + + if (ireason & IDESCSI_IREASON_COD) { + printk (KERN_ERR "ide-scsi: CoD != 0 in idescsi_pc_intr\n"); + return ide_do_reset (drive); + } + if (ireason & IDESCSI_IREASON_IO) { + temp = pc->actually_transferred + bcount; + 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 + atapi_input_bytes(drive, pc->current_position, temp); + printk(KERN_ERR "ide-scsi: transferred %d of %d bytes\n", temp, bcount); + } + pc->actually_transferred += temp; + pc->current_position += temp; + idescsi_discard_data (drive,bcount - temp); + ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc), NULL); + 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 & IDESCSI_IREASON_IO) { + clear_bit(PC_WRITING, &pc->flags); + if (pc->sg) + idescsi_input_buffers (drive, pc, bcount); + else + atapi_input_bytes (drive,pc->current_position,bcount); + } else { + set_bit(PC_WRITING, &pc->flags); + if (pc->sg) + idescsi_output_buffers (drive, pc, bcount); + else + atapi_output_bytes (drive,pc->current_position,bcount); + } + pc->actually_transferred+=bcount; /* Update the current position */ + pc->current_position+=bcount; + + ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc), NULL); /* And set the interrupt handler again */ + return ide_started; +} + +static ide_startstop_t idescsi_transfer_pc (ide_drive_t *drive) +{ + idescsi_scsi_t *scsi = drive->driver_data; + idescsi_pc_t *pc = scsi->pc; + byte 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 = IN_BYTE (IDE_IREASON_REG); + if ((ireason & (IDESCSI_IREASON_IO | IDESCSI_IREASON_COD)) != IDESCSI_IREASON_COD) { + printk (KERN_ERR "ide-scsi: (IO,CoD) != (0,1) while issuing a packet command\n"); + return ide_do_reset (drive); + } + ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc), NULL); /* Set the interrupt routine */ + atapi_output_bytes (drive, scsi->pc->c, 12); /* Send the actual packet */ + return ide_started; +} + +/* + * Issue a packet command + */ +static ide_startstop_t idescsi_issue_pc (ide_drive_t *drive, idescsi_pc_t *pc) +{ + idescsi_scsi_t *scsi = drive->driver_data; + int bcount; + struct request *rq = pc->rq; + int dma_ok = 0; + + 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 = IDE_MIN (pc->request_transfer, 63 * 1024); /* Request to transfer the entire buffer at once */ + + if (drive->using_dma && rq->bio) + dma_ok=!HWIF(drive)->dmaproc(test_bit (PC_WRITING, &pc->flags) ? ide_dma_write : ide_dma_read, drive); + + SELECT_DRIVE(HWIF(drive), drive); + if (IDE_CONTROL_REG) + OUT_BYTE (drive->ctl,IDE_CONTROL_REG); + OUT_BYTE (dma_ok,IDE_FEATURE_REG); + OUT_BYTE (bcount >> 8,IDE_BCOUNTH_REG); + OUT_BYTE (bcount & 0xff,IDE_BCOUNTL_REG); + + if (dma_ok) { + set_bit (PC_DMA_IN_PROGRESS, &pc->flags); + (void) (HWIF(drive)->dmaproc(ide_dma_begin, drive)); + } + if (test_bit (IDESCSI_DRQ_INTERRUPT, &scsi->flags)) { + ide_set_handler (drive, &idescsi_transfer_pc, get_timeout(pc), NULL); + OUT_BYTE (WIN_PACKETCMD, IDE_COMMAND_REG); /* Issue the packet command */ + return ide_started; + } else { + OUT_BYTE (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, unsigned long block) +{ +#if IDESCSI_DEBUG_LOG + printk (KERN_INFO "rq_status: %d, rq_dev: %u, cmd: %d, errors: %d\n",rq->rq_status,(unsigned int) rq->rq_dev,rq->cmd,rq->errors); + printk (KERN_INFO "sector: %ld, nr_sectors: %ld, current_nr_sectors: %ld\n",rq->sector,rq->nr_sectors,rq->current_nr_sectors); +#endif /* IDESCSI_DEBUG_LOG */ + + if (rq->flags & REQ_SPECIAL) { + return idescsi_issue_pc (drive, (idescsi_pc_t *) rq->special); + } + blk_dump_rq_flags(rq, "ide-scsi: unsup command"); + idescsi_end_request (drive, 0); + return ide_stopped; +} + +static int idescsi_open (struct inode *inode, struct file *filp, ide_drive_t *drive) +{ + MOD_INC_USE_COUNT; + return 0; +} + +static void idescsi_ide_release (struct inode *inode, struct file *filp, ide_drive_t *drive) +{ + MOD_DEC_USE_COUNT; +} + +static ide_drive_t *idescsi_drives[MAX_HWIFS * MAX_DRIVES]; +static int idescsi_initialized = 0; + +static void idescsi_add_settings(ide_drive_t *drive) +{ + idescsi_scsi_t *scsi = drive->driver_data; + +/* + * 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, int id) +{ + DRIVER(drive)->busy++; + idescsi_drives[id] = drive; + drive->driver_data = scsi; + drive->ready_stat = 0; + memset (scsi, 0, sizeof (idescsi_scsi_t)); + scsi->drive = drive; + 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); +} + +static int idescsi_cleanup (ide_drive_t *drive) +{ + idescsi_scsi_t *scsi = drive->driver_data; + + if (ide_unregister_subdriver (drive)) + return 1; + drive->driver_data = NULL; + kfree (scsi); + return 0; +} + +/* + * IDE subdriver functions, registered with ide.c + */ +static ide_driver_t idescsi_driver = { + name: "ide-scsi", + version: IDESCSI_VERSION, + media: ide_scsi, + busy: 0, + supports_dma: 1, + supports_dsc_overlap: 0, + cleanup: idescsi_cleanup, + standby: NULL, + flushcache: NULL, + do_request: idescsi_do_request, + end_request: idescsi_end_request, + ioctl: NULL, + open: idescsi_open, + release: idescsi_ide_release, + media_change: NULL, + revalidate: NULL, + pre_reset: NULL, + capacity: NULL, + special: NULL, + proc: NULL, +}; + +int idescsi_init (void); +static ide_module_t idescsi_module = { + IDE_DRIVER_MODULE, + idescsi_init, + &idescsi_driver, + NULL +}; + +/* + * idescsi_init will register the driver for each scsi. + */ +int idescsi_init (void) +{ + ide_drive_t *drive; + idescsi_scsi_t *scsi; + byte media[] = {TYPE_DISK, TYPE_TAPE, TYPE_PROCESSOR, TYPE_WORM, TYPE_ROM, TYPE_SCANNER, TYPE_MOD, 255}; + int i, failed, id; + + if (idescsi_initialized) + return 0; + idescsi_initialized = 1; + for (i = 0; i < MAX_HWIFS * MAX_DRIVES; i++) + idescsi_drives[i] = NULL; + MOD_INC_USE_COUNT; + for (i = 0; media[i] != 255; i++) { + failed = 0; + while ((drive = ide_scan_devices (media[i], idescsi_driver.name, NULL, failed++)) != NULL) { + + if ((scsi = (idescsi_scsi_t *) kmalloc (sizeof (idescsi_scsi_t), GFP_KERNEL)) == NULL) { + printk (KERN_ERR "ide-scsi: %s: Can't allocate a scsi structure\n", drive->name); + continue; + } + if (ide_register_subdriver (drive, &idescsi_driver, IDE_SUBDRIVER_VERSION)) { + printk (KERN_ERR "ide-scsi: %s: Failed to register the driver with ide.c\n", drive->name); + kfree (scsi); + continue; + } + for (id = 0; id < MAX_HWIFS * MAX_DRIVES && idescsi_drives[id]; id++); + idescsi_setup (drive, scsi, id); + failed--; + } + } + ide_register_module(&idescsi_module); + MOD_DEC_USE_COUNT; + return 0; +} + +int idescsi_detect (Scsi_Host_Template *host_template) +{ + struct Scsi_Host *host; + int id; + int last_lun = 0; + + host_template->proc_name = "ide-scsi"; + host = scsi_register(host_template, 0); + if(host == NULL) + return 0; + + for (id = 0; id < MAX_HWIFS * MAX_DRIVES && idescsi_drives[id]; id++) + last_lun = IDE_MAX(last_lun, idescsi_drives[id]->last_lun); + host->max_id = id; + host->max_lun = last_lun + 1; + host->can_queue = host->cmd_per_lun * id; + return 1; +} + +int idescsi_release (struct Scsi_Host *host) +{ + ide_drive_t *drive; + int id; + + for (id = 0; id < MAX_HWIFS * MAX_DRIVES; id++) { + drive = idescsi_drives[id]; + if (drive) + DRIVER(drive)->busy--; + } + return 0; +} + +const char *idescsi_info (struct Scsi_Host *host) +{ + return "SCSI host adapter emulation for IDE ATAPI devices"; +} + +int idescsi_ioctl (Scsi_Device *dev, int cmd, void *arg) +{ + ide_drive_t *drive = idescsi_drives[dev->id]; + idescsi_scsi_t *scsi = drive->driver_data; + + 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 *) arg); + return -EINVAL; +} + +static inline struct bio *idescsi_kmalloc_bio (int count) +{ + struct bio *bh, *bhp, *first_bh; + + if ((first_bh = bhp = bh = bio_alloc(GFP_ATOMIC, 1)) == NULL) + goto abort; + bio_init(bh); + bh->bi_vcnt = 1; + while (--count) { + if ((bh = bio_alloc(GFP_ATOMIC, 1)) == NULL) + goto abort; + bio_init(bh); + bh->bi_vcnt = 1; + bhp->bi_next = bh; + bhp = bh; + bh->bi_next = NULL; + } + return first_bh; +abort: + idescsi_free_bio (first_bh); + return NULL; +} + +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 inline struct bio *idescsi_dma_bio(ide_drive_t *drive, idescsi_pc_t *pc) +{ + struct bio *bh = NULL, *first_bh = NULL; + int segments = pc->scsi_cmd->use_sg; + struct scatterlist *sg = pc->scsi_cmd->request_buffer; + + if (!drive->using_dma || !pc->request_transfer || pc->request_transfer % 1024) + return NULL; + if (idescsi_set_direction(pc)) + return NULL; + if (segments) { + if ((first_bh = bh = idescsi_kmalloc_bio (segments)) == NULL) + return NULL; +#if IDESCSI_DEBUG_LOG + printk ("ide-scsi: %s: building DMA table, %d segments, %dkB total\n", drive->name, segments, pc->request_transfer >> 10); +#endif /* IDESCSI_DEBUG_LOG */ + while (segments--) { + bh->bi_io_vec[0].bv_page = sg->page; + bh->bi_io_vec[0].bv_len = sg->length; + bh->bi_io_vec[0].bv_offset = sg->offset; + bh->bi_size = sg->length; + bh = bh->bi_next; + sg++; + } + } else { + if ((first_bh = bh = idescsi_kmalloc_bio (1)) == NULL) + return NULL; +#if IDESCSI_DEBUG_LOG + printk ("ide-scsi: %s: building DMA table for a single buffer (%dkB)\n", drive->name, pc->request_transfer >> 10); +#endif /* IDESCSI_DEBUG_LOG */ + bh->bi_io_vec[0].bv_page = virt_to_page(pc->scsi_cmd->request_buffer); + bh->bi_io_vec[0].bv_len = pc->request_transfer; + bh->bi_io_vec[0].bv_offset = (unsigned long) pc->scsi_cmd->request_buffer & ~PAGE_MASK; + bh->bi_size = pc->request_transfer; + } + return first_bh; +} + +static inline int should_transform(ide_drive_t *drive, Scsi_Cmnd *cmd) +{ + idescsi_scsi_t *scsi = drive->driver_data; + + if (major(cmd->request->rq_dev) == SCSI_GENERIC_MAJOR) + return test_bit(IDESCSI_SG_TRANSFORM, &scsi->transform); + return test_bit(IDESCSI_TRANSFORM, &scsi->transform); +} + +int idescsi_queue (Scsi_Cmnd *cmd, void (*done)(Scsi_Cmnd *)) +{ + ide_drive_t *drive = idescsi_drives[cmd->target]; + idescsi_scsi_t *scsi; + struct request *rq = NULL; + idescsi_pc_t *pc = NULL; + + if (!drive) { + printk (KERN_ERR "ide-scsi: drive id %d not present\n", cmd->target); + goto abort; + } + scsi = drive->driver_data; + 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->bio = idescsi_dma_bio (drive, pc); + rq->flags = REQ_SPECIAL; + spin_unlock_irq(cmd->host->host_lock); + (void) ide_do_drive_cmd (drive, rq, ide_end); + spin_lock_irq(cmd->host->host_lock); + return 0; +abort: + if (pc) kfree (pc); + if (rq) kfree (rq); + cmd->result = DID_ERROR << 16; + done(cmd); + return 0; +} + +int idescsi_abort (Scsi_Cmnd *cmd) +{ + return SCSI_ABORT_SNOOZE; +} + +int idescsi_reset (Scsi_Cmnd *cmd, unsigned int resetflags) +{ + return SCSI_RESET_SUCCESS; +} + +int idescsi_bios (Disk *disk, kdev_t dev, int *parm) +{ + ide_drive_t *drive = idescsi_drives[disk->device->id]; + + 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 Scsi_Host_Template idescsi_template = { + module: THIS_MODULE, + name: "idescsi", + detect: idescsi_detect, + release: idescsi_release, + info: idescsi_info, + ioctl: idescsi_ioctl, + queuecommand: idescsi_queue, + abort: idescsi_abort, + reset: idescsi_reset, + bios_param: idescsi_bios, + can_queue: 10, + this_id: -1, + sg_tablesize: 256, + cmd_per_lun: 5, + use_clustering: DISABLE_CLUSTERING, + emulated: 1, +}; + +static int __init init_idescsi_module(void) +{ + idescsi_init(); + scsi_register_host(&idescsi_template); + return 0; +} + +static void __exit exit_idescsi_module(void) +{ + ide_drive_t *drive; + byte media[] = {TYPE_DISK, TYPE_TAPE, TYPE_PROCESSOR, TYPE_WORM, TYPE_ROM, TYPE_SCANNER, TYPE_MOD, 255}; + int i, failed; + + scsi_unregister_host(&idescsi_template); + for (i = 0; media[i] != 255; i++) { + failed = 0; + while ((drive = ide_scan_devices (media[i], idescsi_driver.name, &idescsi_driver, failed)) != NULL) + if (idescsi_cleanup (drive)) { + printk ("%s: exit_idescsi_module() called while still busy\n", drive->name); + failed++; + } + } + ide_unregister_module(&idescsi_module); +} + +module_init(init_idescsi_module); +module_exit(exit_idescsi_module); +MODULE_LICENSE("GPL");