forked from Minki/linux
[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 <bharrosh@panasas.com> Acked-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Boaz Harrosh
James Bottomley
parent
52aeeca900
commit
427d0bd4fd
@ -82,14 +82,12 @@ typedef struct idescsi_pc_s {
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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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@ -175,7 +173,8 @@ static void idescsi_input_buffers (ide_drive_t *drive, idescsi_pc_t *pc, unsigne
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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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if (pc->sg - scsi_sglist(pc->scsi_cmd) >
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scsi_sg_count(pc->scsi_cmd)) {
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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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@ -210,7 +209,8 @@ static void idescsi_output_buffers (ide_drive_t *drive, idescsi_pc_t *pc, unsign
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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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if (pc->sg - scsi_sglist(pc->scsi_cmd) >
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scsi_sg_count(pc->scsi_cmd)) {
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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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@ -239,77 +239,6 @@ static void idescsi_output_buffers (ide_drive_t *drive, idescsi_pc_t *pc, unsign
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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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@ -393,7 +322,6 @@ static int idescsi_end_request (ide_drive_t *drive, int uptodate, int nrsecs)
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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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int errors = rq->errors;
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unsigned long flags;
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@ -434,15 +362,6 @@ static int idescsi_end_request (ide_drive_t *drive, int uptodate, int nrsecs)
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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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@ -637,19 +556,14 @@ static int idescsi_map_sg(ide_drive_t *drive, idescsi_pc_t *pc)
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return 1;
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sg = hwif->sg_table;
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scsi_sg = pc->scsi_cmd->request_buffer;
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segments = pc->scsi_cmd->use_sg;
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scsi_sg = scsi_sglist(pc->scsi_cmd);
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segments = scsi_sg_count(pc->scsi_cmd);
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if (segments > hwif->sg_max_nents)
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return 1;
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if (!segments) {
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hwif->sg_nents = 1;
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sg_init_one(sg, pc->scsi_cmd->request_buffer, pc->request_transfer);
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} else {
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hwif->sg_nents = segments;
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memcpy(sg, scsi_sg, sizeof(*sg) * segments);
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}
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hwif->sg_nents = segments;
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memcpy(sg, scsi_sg, sizeof(*sg) * segments);
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return 0;
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}
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@ -744,7 +658,6 @@ static void idescsi_setup (ide_drive_t *drive, idescsi_scsi_t *scsi)
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{
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if (drive->id && (drive->id->config & 0x0060) == 0x20)
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set_bit (IDESCSI_DRQ_INTERRUPT, &scsi->flags);
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set_bit(IDESCSI_TRANSFORM, &scsi->transform);
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clear_bit(IDESCSI_SG_TRANSFORM, &scsi->transform);
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#if IDESCSI_DEBUG_LOG
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set_bit(IDESCSI_LOG_CMD, &scsi->log);
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@ -838,6 +751,8 @@ static struct block_device_operations idescsi_ops = {
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static int idescsi_slave_configure(struct scsi_device * sdp)
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{
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/* Configure detected device */
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sdp->use_10_for_rw = 1;
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sdp->use_10_for_ms = 1;
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scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, sdp->host->cmd_per_lun);
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return 0;
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}
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@ -862,24 +777,6 @@ static int idescsi_ioctl (struct scsi_device *dev, int cmd, void __user *arg)
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return -EINVAL;
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}
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static inline int should_transform(ide_drive_t *drive, struct scsi_cmnd *cmd)
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{
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idescsi_scsi_t *scsi = drive_to_idescsi(drive);
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/* this was a layering violation and we can't support it
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anymore, sorry. */
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#if 0
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struct gendisk *disk = cmd->request->rq_disk;
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if (disk) {
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struct struct scsi_device_Template **p = disk->private_data;
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if (strcmp((*p)->scsi_driverfs_driver.name, "sg") == 0)
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return test_bit(IDESCSI_SG_TRANSFORM, &scsi->transform);
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}
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#endif
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return test_bit(IDESCSI_TRANSFORM, &scsi->transform);
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}
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static int idescsi_queue (struct scsi_cmnd *cmd,
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void (*done)(struct scsi_cmnd *))
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{
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@ -905,23 +802,14 @@ static int idescsi_queue (struct scsi_cmnd *cmd,
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pc->flags = 0;
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pc->rq = rq;
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memcpy (pc->c, cmd->cmnd, cmd->cmd_len);
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if (cmd->use_sg) {
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pc->buffer = NULL;
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pc->sg = cmd->request_buffer;
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} else {
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pc->buffer = cmd->request_buffer;
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pc->sg = NULL;
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}
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pc->buffer = NULL;
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pc->sg = scsi_sglist(cmd);
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pc->b_count = 0;
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pc->request_transfer = pc->buffer_size = cmd->request_bufflen;
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pc->request_transfer = pc->buffer_size = scsi_bufflen(cmd);
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pc->scsi_cmd = cmd;
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pc->done = done;
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pc->timeout = jiffies + cmd->timeout_per_command;
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if (should_transform(drive, cmd))
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set_bit(PC_TRANSFORM, &pc->flags);
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idescsi_transform_pc1 (drive, pc);
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if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) {
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printk ("ide-scsi: %s: que %lu, cmd = ", drive->name, cmd->serial_number);
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hexdump(cmd->cmnd, cmd->cmd_len);
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