From 427d0bd4fde60f40e9518817d826e48c05262a98 Mon Sep 17 00:00:00 2001 From: Boaz Harrosh Date: Tue, 18 Sep 2007 12:27:43 +0200 Subject: [PATCH] [SCSI] ide-scsi.: convert to data accessors and !use_sg cleanup - Convert ide-scsi to the new data accessors and cleanup the !use_sg code paths. In old code the driver was trying to translate narrow commands, if received, to wide commands. This code path still assumed scsi_cmnd->request_buffer is a linear char pointer. This means that this driver was broken since 2.6.17. As suggested by Christoph Hellwig I set use_10_for_rw = 1; and use_10_for_ms = 1; for this device and completely killed the translation. Signed-off-by: Boaz Harrosh Acked-by: Bartlomiej Zolnierkiewicz Signed-off-by: James Bottomley --- drivers/scsi/ide-scsi.c | 138 ++++------------------------------------ 1 file changed, 13 insertions(+), 125 deletions(-) diff --git a/drivers/scsi/ide-scsi.c b/drivers/scsi/ide-scsi.c index 1cc01acc280..3b55a6c10b6 100644 --- a/drivers/scsi/ide-scsi.c +++ b/drivers/scsi/ide-scsi.c @@ -82,14 +82,12 @@ typedef struct idescsi_pc_s { */ #define PC_DMA_IN_PROGRESS 0 /* 1 while DMA in progress */ #define PC_WRITING 1 /* Data direction */ -#define PC_TRANSFORM 2 /* transform SCSI commands */ #define PC_TIMEDOUT 3 /* command timed out */ #define PC_DMA_OK 4 /* Use DMA */ /* * SCSI command transformation layer */ -#define IDESCSI_TRANSFORM 0 /* Enable/Disable transformation */ #define IDESCSI_SG_TRANSFORM 1 /* /dev/sg transformation */ /* @@ -175,7 +173,8 @@ static void idescsi_input_buffers (ide_drive_t *drive, idescsi_pc_t *pc, unsigne char *buf; while (bcount) { - if (pc->sg - (struct scatterlist *) pc->scsi_cmd->request_buffer > pc->scsi_cmd->use_sg) { + if (pc->sg - scsi_sglist(pc->scsi_cmd) > + scsi_sg_count(pc->scsi_cmd)) { printk (KERN_ERR "ide-scsi: scatter gather table too small, discarding data\n"); idescsi_discard_data (drive, bcount); return; @@ -210,7 +209,8 @@ static void idescsi_output_buffers (ide_drive_t *drive, idescsi_pc_t *pc, unsign char *buf; while (bcount) { - if (pc->sg - (struct scatterlist *) pc->scsi_cmd->request_buffer > pc->scsi_cmd->use_sg) { + if (pc->sg - scsi_sglist(pc->scsi_cmd) > + scsi_sg_count(pc->scsi_cmd)) { printk (KERN_ERR "ide-scsi: scatter gather table too small, padding with zeros\n"); idescsi_output_zeros (drive, bcount); return; @@ -239,77 +239,6 @@ static void idescsi_output_buffers (ide_drive_t *drive, idescsi_pc_t *pc, unsign } } -/* - * 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) { - unsigned short new_len; - 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]; - new_len = sc[4] + 4; - c[8] = new_len; - c[7] = new_len >> 8; - c[9] = sc[5]; - 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 void hexdump(u8 *x, int len) { int i; @@ -393,7 +322,6 @@ static int idescsi_end_request (ide_drive_t *drive, int uptodate, int nrsecs) 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; int errors = rq->errors; unsigned long flags; @@ -434,15 +362,6 @@ static int idescsi_end_request (ide_drive_t *drive, int uptodate, int nrsecs) pc->scsi_cmd->result = (CHECK_CONDITION << 1) | (DID_OK << 16); } 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, min_t(unsigned, 16, pc->scsi_cmd->request_bufflen)); - } else printk("\n"); - } } host = pc->scsi_cmd->device->host; spin_lock_irqsave(host->host_lock, flags); @@ -637,19 +556,14 @@ static int idescsi_map_sg(ide_drive_t *drive, idescsi_pc_t *pc) return 1; sg = hwif->sg_table; - scsi_sg = pc->scsi_cmd->request_buffer; - segments = pc->scsi_cmd->use_sg; + scsi_sg = scsi_sglist(pc->scsi_cmd); + segments = scsi_sg_count(pc->scsi_cmd); 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); - } + hwif->sg_nents = segments; + memcpy(sg, scsi_sg, sizeof(*sg) * segments); return 0; } @@ -744,7 +658,6 @@ static void idescsi_setup (ide_drive_t *drive, idescsi_scsi_t *scsi) { 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); @@ -838,6 +751,8 @@ static struct block_device_operations idescsi_ops = { static int idescsi_slave_configure(struct scsi_device * sdp) { /* Configure detected device */ + sdp->use_10_for_rw = 1; + sdp->use_10_for_ms = 1; scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, sdp->host->cmd_per_lun); return 0; } @@ -862,24 +777,6 @@ static int idescsi_ioctl (struct scsi_device *dev, int cmd, void __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 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 *)) { @@ -905,23 +802,14 @@ static int idescsi_queue (struct scsi_cmnd *cmd, 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->buffer = NULL; + pc->sg = scsi_sglist(cmd); pc->b_count = 0; - pc->request_transfer = pc->buffer_size = cmd->request_bufflen; + pc->request_transfer = pc->buffer_size = scsi_bufflen(cmd); 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); -- 2.41.1