mirror of https://gitee.com/openkylin/linux.git
[SCSI] arm: convert to accessors and !use_sg cleanup
- convert to accessors and !use_sg cleanup Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Tested-by: Russell King <rmk@arm.linux.org.uk> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Boaz Harrosh
James Bottomley
parent
c9e86b8b1d
commit
84ac86ca8c
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@ -1790,7 +1790,7 @@ int acornscsi_starttransfer(AS_Host *host)
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return 0;
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}
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residual = host->SCpnt->request_bufflen - host->scsi.SCp.scsi_xferred;
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residual = scsi_bufflen(host->SCpnt) - host->scsi.SCp.scsi_xferred;
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sbic_arm_write(host->scsi.io_port, SBIC_SYNCHTRANSFER, host->device[host->SCpnt->device->id].sync_xfer);
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sbic_arm_writenext(host->scsi.io_port, residual >> 16);
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@ -2270,7 +2270,7 @@ intr_ret_t acornscsi_sbicintr(AS_Host *host, int in_irq)
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case 0x4b: /* -> PHASE_STATUSIN */
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case 0x8b: /* -> PHASE_STATUSIN */
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/* DATA IN -> STATUS */
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host->scsi.SCp.scsi_xferred = host->SCpnt->request_bufflen -
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host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) -
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acornscsi_sbic_xfcount(host);
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acornscsi_dma_stop(host);
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acornscsi_readstatusbyte(host);
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@ -2281,7 +2281,7 @@ intr_ret_t acornscsi_sbicintr(AS_Host *host, int in_irq)
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case 0x4e: /* -> PHASE_MSGOUT */
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case 0x8e: /* -> PHASE_MSGOUT */
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/* DATA IN -> MESSAGE OUT */
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host->scsi.SCp.scsi_xferred = host->SCpnt->request_bufflen -
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host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) -
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acornscsi_sbic_xfcount(host);
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acornscsi_dma_stop(host);
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acornscsi_sendmessage(host);
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@ -2291,7 +2291,7 @@ intr_ret_t acornscsi_sbicintr(AS_Host *host, int in_irq)
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case 0x4f: /* message in */
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case 0x8f: /* message in */
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/* DATA IN -> MESSAGE IN */
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host->scsi.SCp.scsi_xferred = host->SCpnt->request_bufflen -
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host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) -
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acornscsi_sbic_xfcount(host);
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acornscsi_dma_stop(host);
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acornscsi_message(host); /* -> PHASE_MSGIN, PHASE_DISCONNECT */
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@ -2319,7 +2319,7 @@ intr_ret_t acornscsi_sbicintr(AS_Host *host, int in_irq)
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case 0x4b: /* -> PHASE_STATUSIN */
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case 0x8b: /* -> PHASE_STATUSIN */
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/* DATA OUT -> STATUS */
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host->scsi.SCp.scsi_xferred = host->SCpnt->request_bufflen -
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host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) -
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acornscsi_sbic_xfcount(host);
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acornscsi_dma_stop(host);
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acornscsi_dma_adjust(host);
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@ -2331,7 +2331,7 @@ intr_ret_t acornscsi_sbicintr(AS_Host *host, int in_irq)
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case 0x4e: /* -> PHASE_MSGOUT */
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case 0x8e: /* -> PHASE_MSGOUT */
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/* DATA OUT -> MESSAGE OUT */
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host->scsi.SCp.scsi_xferred = host->SCpnt->request_bufflen -
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host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) -
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acornscsi_sbic_xfcount(host);
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acornscsi_dma_stop(host);
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acornscsi_dma_adjust(host);
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@ -2342,7 +2342,7 @@ intr_ret_t acornscsi_sbicintr(AS_Host *host, int in_irq)
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case 0x4f: /* message in */
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case 0x8f: /* message in */
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/* DATA OUT -> MESSAGE IN */
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host->scsi.SCp.scsi_xferred = host->SCpnt->request_bufflen -
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host->scsi.SCp.scsi_xferred = scsi_bufflen(host->SCpnt) -
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acornscsi_sbic_xfcount(host);
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acornscsi_dma_stop(host);
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acornscsi_dma_adjust(host);
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@ -18,17 +18,32 @@
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* The scatter-gather list handling. This contains all
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* the yucky stuff that needs to be fixed properly.
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*/
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/*
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* copy_SCp_to_sg() Assumes contiguous allocation at @sg of at-most @max
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* entries of uninitialized memory. SCp is from scsi-ml and has a valid
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* (possibly chained) sg-list
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*/
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static inline int copy_SCp_to_sg(struct scatterlist *sg, struct scsi_pointer *SCp, int max)
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{
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int bufs = SCp->buffers_residual;
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/* FIXME: It should be easy for drivers to loop on copy_SCp_to_sg().
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* and to remove this BUG_ON. Use min() in-its-place
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*/
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BUG_ON(bufs + 1 > max);
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sg_set_buf(sg, SCp->ptr, SCp->this_residual);
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if (bufs)
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memcpy(sg + 1, SCp->buffer + 1,
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sizeof(struct scatterlist) * bufs);
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if (bufs) {
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struct scatterlist *src_sg;
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unsigned i;
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for_each_sg(sg_next(SCp->buffer), src_sg, bufs, i)
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*(++sg) = *src_sg;
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sg_mark_end(sg);
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}
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return bufs + 1;
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}
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@ -36,7 +51,7 @@ static inline int next_SCp(struct scsi_pointer *SCp)
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{
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int ret = SCp->buffers_residual;
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if (ret) {
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SCp->buffer++;
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SCp->buffer = sg_next(SCp->buffer);
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SCp->buffers_residual--;
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SCp->ptr = sg_virt(SCp->buffer);
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SCp->this_residual = SCp->buffer->length;
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@ -68,46 +83,46 @@ static inline void init_SCp(struct scsi_cmnd *SCpnt)
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{
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memset(&SCpnt->SCp, 0, sizeof(struct scsi_pointer));
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if (SCpnt->use_sg) {
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if (scsi_bufflen(SCpnt)) {
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unsigned long len = 0;
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int buf;
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SCpnt->SCp.buffer = (struct scatterlist *) SCpnt->request_buffer;
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SCpnt->SCp.buffers_residual = SCpnt->use_sg - 1;
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SCpnt->SCp.buffer = scsi_sglist(SCpnt);
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SCpnt->SCp.buffers_residual = scsi_sg_count(SCpnt) - 1;
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SCpnt->SCp.ptr = sg_virt(SCpnt->SCp.buffer);
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SCpnt->SCp.this_residual = SCpnt->SCp.buffer->length;
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SCpnt->SCp.phase = SCpnt->request_bufflen;
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SCpnt->SCp.phase = scsi_bufflen(SCpnt);
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#ifdef BELT_AND_BRACES
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/*
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* Calculate correct buffer length. Some commands
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* come in with the wrong request_bufflen.
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*/
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for (buf = 0; buf <= SCpnt->SCp.buffers_residual; buf++)
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len += SCpnt->SCp.buffer[buf].length;
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{ /*
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* Calculate correct buffer length. Some commands
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* come in with the wrong scsi_bufflen.
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*/
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struct scatterlist *sg;
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unsigned i, sg_count = scsi_sg_count(SCpnt);
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if (SCpnt->request_bufflen != len)
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printk(KERN_WARNING "scsi%d.%c: bad request buffer "
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"length %d, should be %ld\n", SCpnt->device->host->host_no,
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'0' + SCpnt->device->id, SCpnt->request_bufflen, len);
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SCpnt->request_bufflen = len;
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scsi_for_each_sg(SCpnt, sg, sg_count, i)
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len += sg->length;
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if (scsi_bufflen(SCpnt) != len) {
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printk(KERN_WARNING
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"scsi%d.%c: bad request buffer "
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"length %d, should be %ld\n",
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SCpnt->device->host->host_no,
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'0' + SCpnt->device->id,
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scsi_bufflen(SCpnt), len);
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/*
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* FIXME: Totaly naive fixup. We should abort
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* with error
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*/
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SCpnt->SCp.phase =
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min_t(unsigned long, len,
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scsi_bufflen(SCpnt));
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}
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}
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#endif
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} else {
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SCpnt->SCp.ptr = (unsigned char *)SCpnt->request_buffer;
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SCpnt->SCp.this_residual = SCpnt->request_bufflen;
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SCpnt->SCp.phase = SCpnt->request_bufflen;
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}
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/*
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* If the upper SCSI layers pass a buffer, but zero length,
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* we aren't interested in the buffer pointer.
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*/
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if (SCpnt->SCp.this_residual == 0 && SCpnt->SCp.ptr) {
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#if 0 //def BELT_AND_BRACES
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printk(KERN_WARNING "scsi%d.%c: zero length buffer passed for "
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"command ", SCpnt->host->host_no, '0' + SCpnt->target);
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__scsi_print_command(SCpnt->cmnd);
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#endif
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SCpnt->SCp.ptr = NULL;
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SCpnt->SCp.this_residual = 0;
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SCpnt->SCp.phase = 0;
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}
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}
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