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| author | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-16 19:09:16 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-16 19:09:16 +0200 |
| commit | 92d15c2ccbb3e31a3fc71ad28fdb55e1319383c0 (patch) | |
| tree | 8d83c0dc3c6b935d8367e331872f242b742f0a8a /drivers | |
| parent | time: introduce xtime_seconds (diff) | |
| parent | Fix memory leak in dm-crypt (diff) | |
| download | linux-92d15c2ccbb3e31a3fc71ad28fdb55e1319383c0.tar.xz linux-92d15c2ccbb3e31a3fc71ad28fdb55e1319383c0.zip | |
Merge branch 'for-linus' of git://git.kernel.dk/data/git/linux-2.6-block
* 'for-linus' of git://git.kernel.dk/data/git/linux-2.6-block: (63 commits)
Fix memory leak in dm-crypt
SPARC64: sg chaining support
SPARC: sg chaining support
PPC: sg chaining support
PS3: sg chaining support
IA64: sg chaining support
x86-64: enable sg chaining
x86-64: update pci-gart iommu to sg helpers
x86-64: update nommu to sg helpers
x86-64: update calgary iommu to sg helpers
swiotlb: sg chaining support
i386: enable sg chaining
i386 dma_map_sg: convert to using sg helpers
mmc: need to zero sglist on init
Panic in blk_rq_map_sg() from CCISS driver
remove sglist_len
remove blk_queue_max_phys_segments in libata
revert sg segment size ifdefs
Fixup u14-34f ENABLE_SG_CHAINING
qla1280: enable use_sg_chaining option
...
Diffstat (limited to 'drivers')
88 files changed, 522 insertions, 646 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 68699b3e7998..bbaa545ea999 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -1410,7 +1410,7 @@ static void ata_qc_complete_internal(struct ata_queued_cmd *qc) */ unsigned ata_exec_internal_sg(struct ata_device *dev, struct ata_taskfile *tf, const u8 *cdb, - int dma_dir, struct scatterlist *sg, + int dma_dir, struct scatterlist *sgl, unsigned int n_elem, unsigned long timeout) { struct ata_link *link = dev->link; @@ -1472,11 +1472,12 @@ unsigned ata_exec_internal_sg(struct ata_device *dev, qc->dma_dir = dma_dir; if (dma_dir != DMA_NONE) { unsigned int i, buflen = 0; + struct scatterlist *sg; - for (i = 0; i < n_elem; i++) - buflen += sg[i].length; + for_each_sg(sgl, sg, n_elem, i) + buflen += sg->length; - ata_sg_init(qc, sg, n_elem); + ata_sg_init(qc, sgl, n_elem); qc->nbytes = buflen; } @@ -4292,7 +4293,7 @@ void ata_sg_clean(struct ata_queued_cmd *qc) if (qc->n_elem) dma_unmap_sg(ap->dev, sg, qc->n_elem, dir); /* restore last sg */ - sg[qc->orig_n_elem - 1].length += qc->pad_len; + sg_last(sg, qc->orig_n_elem)->length += qc->pad_len; if (pad_buf) { struct scatterlist *psg = &qc->pad_sgent; void *addr = kmap_atomic(psg->page, KM_IRQ0); @@ -4547,6 +4548,7 @@ void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen) qc->orig_n_elem = 1; qc->buf_virt = buf; qc->nbytes = buflen; + qc->cursg = qc->__sg; sg_init_one(&qc->sgent, buf, buflen); } @@ -4572,6 +4574,7 @@ void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, qc->__sg = sg; qc->n_elem = n_elem; qc->orig_n_elem = n_elem; + qc->cursg = qc->__sg; } /** @@ -4661,7 +4664,7 @@ static int ata_sg_setup(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; struct scatterlist *sg = qc->__sg; - struct scatterlist *lsg = &sg[qc->n_elem - 1]; + struct scatterlist *lsg = sg_last(qc->__sg, qc->n_elem); int n_elem, pre_n_elem, dir, trim_sg = 0; VPRINTK("ENTER, ata%u\n", ap->print_id); @@ -4825,7 +4828,6 @@ void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf, static void ata_pio_sector(struct ata_queued_cmd *qc) { int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); - struct scatterlist *sg = qc->__sg; struct ata_port *ap = qc->ap; struct page *page; unsigned int offset; @@ -4834,8 +4836,8 @@ static void ata_pio_sector(struct ata_queued_cmd *qc) if (qc->curbytes == qc->nbytes - qc->sect_size) ap->hsm_task_state = HSM_ST_LAST; - page = sg[qc->cursg].page; - offset = sg[qc->cursg].offset + qc->cursg_ofs; + page = qc->cursg->page; + offset = qc->cursg->offset + qc->cursg_ofs; /* get the current page and offset */ page = nth_page(page, (offset >> PAGE_SHIFT)); @@ -4863,8 +4865,8 @@ static void ata_pio_sector(struct ata_queued_cmd *qc) qc->curbytes += qc->sect_size; qc->cursg_ofs += qc->sect_size; - if (qc->cursg_ofs == (&sg[qc->cursg])->length) { - qc->cursg++; + if (qc->cursg_ofs == qc->cursg->length) { + qc->cursg = sg_next(qc->cursg); qc->cursg_ofs = 0; } } @@ -4950,16 +4952,18 @@ static void __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) { int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); struct scatterlist *sg = qc->__sg; + struct scatterlist *lsg = sg_last(qc->__sg, qc->n_elem); struct ata_port *ap = qc->ap; struct page *page; unsigned char *buf; unsigned int offset, count; + int no_more_sg = 0; if (qc->curbytes + bytes >= qc->nbytes) ap->hsm_task_state = HSM_ST_LAST; next_sg: - if (unlikely(qc->cursg >= qc->n_elem)) { + if (unlikely(no_more_sg)) { /* * The end of qc->sg is reached and the device expects * more data to transfer. In order not to overrun qc->sg @@ -4982,7 +4986,7 @@ next_sg: return; } - sg = &qc->__sg[qc->cursg]; + sg = qc->cursg; page = sg->page; offset = sg->offset + qc->cursg_ofs; @@ -5021,7 +5025,10 @@ next_sg: qc->cursg_ofs += count; if (qc->cursg_ofs == sg->length) { - qc->cursg++; + if (qc->cursg == lsg) + no_more_sg = 1; + + qc->cursg = sg_next(qc->cursg); qc->cursg_ofs = 0; } diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 5237a491622b..9fbb39cd0f58 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -801,8 +801,6 @@ int ata_scsi_slave_config(struct scsi_device *sdev) ata_scsi_sdev_config(sdev); - blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD); - sdev->manage_start_stop = 1; if (dev) diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c index 55c3237fb1bc..3fb7e8bc436d 100644 --- a/drivers/block/cciss.c +++ b/drivers/block/cciss.c @@ -1191,7 +1191,6 @@ static inline void complete_buffers(struct bio *bio, int status) { while (bio) { struct bio *xbh = bio->bi_next; - int nr_sectors = bio_sectors(bio); bio->bi_next = NULL; bio_endio(bio, status ? 0 : -EIO); @@ -2570,6 +2569,7 @@ static void do_cciss_request(struct request_queue *q) (int)creq->nr_sectors); #endif /* CCISS_DEBUG */ + memset(tmp_sg, 0, sizeof(tmp_sg)); seg = blk_rq_map_sg(q, creq, tmp_sg); /* get the DMA records for the setup */ diff --git a/drivers/block/cpqarray.c b/drivers/block/cpqarray.c index 3853c9a38d6a..568603d3043e 100644 --- a/drivers/block/cpqarray.c +++ b/drivers/block/cpqarray.c @@ -981,9 +981,8 @@ static void start_io(ctlr_info_t *h) static inline void complete_buffers(struct bio *bio, int ok) { struct bio *xbh; - while(bio) { - int nr_sectors = bio_sectors(bio); + while (bio) { xbh = bio->bi_next; bio->bi_next = NULL; diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c index 540bf3676985..a8130a4ad6d4 100644 --- a/drivers/block/pktcdvd.c +++ b/drivers/block/pktcdvd.c @@ -1133,16 +1133,21 @@ static void pkt_gather_data(struct pktcdvd_device *pd, struct packet_data *pkt) * Schedule reads for missing parts of the packet. */ for (f = 0; f < pkt->frames; f++) { + struct bio_vec *vec; + int p, offset; if (written[f]) continue; bio = pkt->r_bios[f]; + vec = bio->bi_io_vec; bio_init(bio); bio->bi_max_vecs = 1; bio->bi_sector = pkt->sector + f * (CD_FRAMESIZE >> 9); bio->bi_bdev = pd->bdev; bio->bi_end_io = pkt_end_io_read; bio->bi_private = pkt; + bio->bi_io_vec = vec; + bio->bi_destructor = pkt_bio_destructor; p = (f * CD_FRAMESIZE) / PAGE_SIZE; offset = (f * CD_FRAMESIZE) % PAGE_SIZE; @@ -1439,6 +1444,8 @@ static void pkt_start_write(struct pktcdvd_device *pd, struct packet_data *pkt) pkt->w_bio->bi_bdev = pd->bdev; pkt->w_bio->bi_end_io = pkt_end_io_packet_write; pkt->w_bio->bi_private = pkt; + pkt->w_bio->bi_io_vec = bvec; + pkt->w_bio->bi_destructor = pkt_bio_destructor; for (f = 0; f < pkt->frames; f++) if (!bio_add_page(pkt->w_bio, bvec[f].bv_page, CD_FRAMESIZE, bvec[f].bv_offset)) BUG(); diff --git a/drivers/block/ps3disk.c b/drivers/block/ps3disk.c index 06d0552cf49c..e354bfc070e1 100644 --- a/drivers/block/ps3disk.c +++ b/drivers/block/ps3disk.c @@ -414,26 +414,6 @@ static void ps3disk_prepare_flush(struct request_queue *q, struct request *req) req->cmd_type = REQ_TYPE_FLUSH; } -static int ps3disk_issue_flush(struct request_queue *q, struct gendisk *gendisk, - sector_t *sector) -{ - struct ps3_storage_device *dev = q->queuedata; - struct request *req; - int res; - - dev_dbg(&dev->sbd.core, "%s:%u\n", __func__, __LINE__); - - req = blk_get_request(q, WRITE, __GFP_WAIT); - ps3disk_prepare_flush(q, req); - res = blk_execute_rq(q, gendisk, req, 0); - if (res) - dev_err(&dev->sbd.core, "%s:%u: flush request failed %d\n", - __func__, __LINE__, res); - blk_put_request(req); - return res; -} - - static unsigned long ps3disk_mask; static DEFINE_MUTEX(ps3disk_mask_mutex); @@ -506,7 +486,6 @@ static int __devinit ps3disk_probe(struct ps3_system_bus_device *_dev) blk_queue_dma_alignment(queue, dev->blk_size-1); blk_queue_hardsect_size(queue, dev->blk_size); - blk_queue_issue_flush_fn(queue, ps3disk_issue_flush); blk_queue_ordered(queue, QUEUE_ORDERED_DRAIN_FLUSH, ps3disk_prepare_flush); diff --git a/drivers/ide/cris/ide-cris.c b/drivers/ide/cris/ide-cris.c index 2b4d2a0ae5c2..c306c9f534ab 100644 --- a/drivers/ide/cris/ide-cris.c +++ b/drivers/ide/cris/ide-cris.c @@ -939,7 +939,8 @@ static int cris_ide_build_dmatable (ide_drive_t *drive) /* group sequential buffers into one large buffer */ addr = page_to_phys(sg->page) + sg->offset; size = sg_dma_len(sg); - while (sg++, --i) { + while (--i) { + sg = sg_next(sg); if ((addr + size) != page_to_phys(sg->page) + sg->offset) break; size += sg_dma_len(sg); diff --git a/drivers/ide/ide-disk.c b/drivers/ide/ide-disk.c index 4754769eda97..92177ca48b4d 100644 --- a/drivers/ide/ide-disk.c +++ b/drivers/ide/ide-disk.c @@ -716,32 +716,6 @@ static void idedisk_prepare_flush(struct request_queue *q, struct request *rq) rq->buffer = rq->cmd; } -static int idedisk_issue_flush(struct request_queue *q, struct gendisk *disk, - sector_t *error_sector) -{ - ide_drive_t *drive = q->queuedata; - struct request *rq; - int ret; - - if (!drive->wcache) - return 0; - - rq = blk_get_request(q, WRITE, __GFP_WAIT); - - idedisk_prepare_flush(q, rq); - - ret = blk_execute_rq(q, disk, rq, 0); - - /* - * if we failed and caller wants error offset, get it - */ - if (ret && error_sector) - *error_sector = ide_get_error_location(drive, rq->cmd); - - blk_put_request(rq); - return ret; -} - /* * This is tightly woven into the driver->do_special can not touch. * DON'T do it again until a total personality rewrite is committed. @@ -781,7 +755,6 @@ static void update_ordered(ide_drive_t *drive) struct hd_driveid *id = drive->id; unsigned ordered = QUEUE_ORDERED_NONE; prepare_flush_fn *prep_fn = NULL; - issue_flush_fn *issue_fn = NULL; if (drive->wcache) { unsigned long long capacity; @@ -805,13 +778,11 @@ static void update_ordered(ide_drive_t *drive) if (barrier) { ordered = QUEUE_ORDERED_DRAIN_FLUSH; prep_fn = idedisk_prepare_flush; - issue_fn = idedisk_issue_flush; } } else ordered = QUEUE_ORDERED_DRAIN; blk_queue_ordered(drive->queue, ordered, prep_fn); - blk_queue_issue_flush_fn(drive->queue, issue_fn); } static int write_cache(ide_drive_t *drive, int arg) diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c index b453211ee0fc..a4cbbbaccde9 100644 --- a/drivers/ide/ide-dma.c +++ b/drivers/ide/ide-dma.c @@ -280,7 +280,7 @@ int ide_build_dmatable (ide_drive_t *drive, struct request *rq) } } - sg++; + sg = sg_next(sg); i--; } diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c index 4cece930114c..04273d3c147c 100644 --- a/drivers/ide/ide-io.c +++ b/drivers/ide/ide-io.c @@ -322,41 +322,6 @@ static void ide_complete_pm_request (ide_drive_t *drive, struct request *rq) spin_unlock_irqrestore(&ide_lock, flags); } -/* - * FIXME: probably move this somewhere else, name is bad too :) - */ -u64 ide_get_error_location(ide_drive_t *drive, char *args) -{ - u32 high, low; - u8 hcyl, lcyl, sect; - u64 sector; - - high = 0; - hcyl = args[5]; - lcyl = args[4]; - sect = args[3]; - - if (ide_id_has_flush_cache_ext(drive->id)) { - low = (hcyl << 16) | (lcyl << 8) | sect; - HWIF(drive)->OUTB(drive->ctl|0x80, IDE_CONTROL_REG); - high = ide_read_24(drive); - } else { - u8 cur = HWIF(drive)->INB(IDE_SELECT_REG); - if (cur & 0x40) { - high = cur & 0xf; - low = (hcyl << 16) | (lcyl << 8) | sect; - } else { - low = hcyl * drive->head * drive->sect; - low += lcyl * drive->sect; - low += sect - 1; - } - } - - sector = ((u64) high << 24) | low; - return sector; -} -EXPORT_SYMBOL(ide_get_error_location); - /** * ide_end_drive_cmd - end an explicit drive command * @drive: command @@ -881,7 +846,8 @@ void ide_init_sg_cmd(ide_drive_t *drive, struct request *rq) ide_hwif_t *hwif = drive->hwif; hwif->nsect = hwif->nleft = rq->nr_sectors; - hwif->cursg = hwif->cursg_ofs = 0; + hwif->cursg_ofs = 0; + hwif->cursg = NULL; } EXPORT_SYMBOL_GPL(ide_init_sg_cmd); diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c index d1011712601c..34b1fb65bc79 100644 --- a/drivers/ide/ide-probe.c +++ b/drivers/ide/ide-probe.c @@ -1349,7 +1349,7 @@ static int hwif_init(ide_hwif_t *hwif) if (!hwif->sg_max_nents) hwif->sg_max_nents = PRD_ENTRIES; - hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, + hwif->sg_table = kzalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, GFP_KERNEL); if (!hwif->sg_table) { printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c index aa06dafb74ac..2a3c8d498343 100644 --- a/drivers/ide/ide-taskfile.c +++ b/drivers/ide/ide-taskfile.c @@ -45,6 +45,7 @@ #include <linux/hdreg.h> #include <linux/ide.h> #include <linux/bitops.h> +#include <linux/scatterlist.h> #include <asm/byteorder.h> #include <asm/irq.h> @@ -263,6 +264,7 @@ static void ide_pio_sector(ide_drive_t *drive, unsigned int write) { ide_hwif_t *hwif = drive->hwif; struct scatterlist *sg = hwif->sg_table; + struct scatterlist *cursg = hwif->cursg; struct page *page; #ifdef CONFIG_HIGHMEM unsigned long flags; @@ -270,8 +272,14 @@ static void ide_pio_sector(ide_drive_t *drive, unsigned int write) unsigned int offset; u8 *buf; - page = sg[hwif->cursg].page; - offset = sg[hwif->cursg].offset + hwif->cursg_ofs * SECTOR_SIZE; + cursg = hwif->cursg; + if (!cursg) { + cursg = sg; + hwif->cursg = sg; + } + + page = cursg->page; + offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE; /* get the current page and offset */ page = nth_page(page, (offset >> PAGE_SHIFT)); @@ -285,8 +293,8 @@ static void ide_pio_sector(ide_drive_t *drive, unsigned int write) hwif->nleft--; hwif->cursg_ofs++; - if ((hwif->cursg_ofs * SECTOR_SIZE) == sg[hwif->cursg].length) { - hwif->cursg++; + if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) { + hwif->cursg = sg_next(hwif->cursg); hwif->cursg_ofs = 0; } @@ -367,6 +375,8 @@ static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq, static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat) { + HWIF(drive)->cursg = NULL; + if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) { ide_task_t *task = rq->special; diff --git a/drivers/ide/mips/au1xxx-ide.c b/drivers/ide/mips/au1xxx-ide.c index aebde49365d1..892d08f61dc0 100644 --- a/drivers/ide/mips/au1xxx-ide.c +++ b/drivers/ide/mips/au1xxx-ide.c @@ -296,7 +296,7 @@ static int auide_build_dmatable(ide_drive_t *drive) cur_addr += tc; cur_len -= tc; } - sg++; + sg = sg_next(sg); i--; } diff --git a/drivers/ide/pci/sgiioc4.c b/drivers/ide/pci/sgiioc4.c index 85ffaaa39b1b..c74fef6bbc91 100644 --- a/drivers/ide/pci/sgiioc4.c +++ b/drivers/ide/pci/sgiioc4.c @@ -29,6 +29,7 @@ #include <linux/mm.h> #include <linux/ioport.h> #include <linux/blkdev.h> +#include <linux/scatterlist.h> #include <linux/ioc4.h> #include <asm/io.h> @@ -537,7 +538,7 @@ sgiioc4_build_dma_table(ide_drive_t * drive, struct request *rq, int ddir) } } - sg++; + sg = sg_next(sg); i--; } diff --git a/drivers/ide/ppc/pmac.c b/drivers/ide/ppc/pmac.c index 7d8873839e21..9e86406bf44b 100644 --- a/drivers/ide/ppc/pmac.c +++ b/drivers/ide/ppc/pmac.c @@ -1539,7 +1539,7 @@ pmac_ide_build_dmatable(ide_drive_t *drive, struct request *rq) cur_len -= tc; ++table; } - sg++; + sg = sg_next(sg); i--; } diff --git a/drivers/infiniband/hw/ipath/ipath_dma.c b/drivers/infiniband/hw/ipath/ipath_dma.c index f87f003e3ef8..22709a4f8fc8 100644 --- a/drivers/infiniband/hw/ipath/ipath_dma.c +++ b/drivers/infiniband/hw/ipath/ipath_dma.c @@ -30,6 +30,7 @@ * SOFTWARE. */ +#include <linux/scatterlist.h> #include <rdma/ib_verbs.h> #include "ipath_verbs.h" @@ -96,17 +97,18 @@ static void ipath_dma_unmap_page(struct ib_device *dev, BUG_ON(!valid_dma_direction(direction)); } -static int ipath_map_sg(struct ib_device *dev, struct scatterlist *sg, int nents, - enum dma_data_direction direction) +static int ipath_map_sg(struct ib_device *dev, struct scatterlist *sgl, + int nents, enum dma_data_direction direction) { + struct scatterlist *sg; u64 addr; int i; int ret = nents; BUG_ON(!valid_dma_direction(direction)); - for (i = 0; i < nents; i++) { - addr = (u64) page_address(sg[i].page); + for_each_sg(sgl, sg, nents, i) { + addr = (u64) page_address(sg->page); /* TODO: handle highmem pages */ if (!addr) { ret = 0; diff --git a/drivers/infiniband/ulp/iser/iser_memory.c b/drivers/infiniband/ulp/iser/iser_memory.c index e05690e3592f..f3529b6f0a33 100644 --- a/drivers/infiniband/ulp/iser/iser_memory.c +++ b/drivers/infiniband/ulp/iser/iser_memory.c @@ -124,17 +124,19 @@ static int iser_start_rdma_unaligned_sg(struct iscsi_iser_cmd_task *iser_ctask, if (cmd_dir == ISER_DIR_OUT) { /* copy the unaligned sg the buffer which is used for RDMA */ - struct scatterlist *sg = (struct scatterlist *)data->buf; + struct scatterlist *sgl = (struct scatterlist *)data->buf; + struct scatterlist *sg; int i; char *p, *from; - for (p = mem, i = 0; i < data->size; i++) { - from = kmap_atomic(sg[i].page, KM_USER0); + p = mem; + for_each_sg(sgl, sg, data->size, i) { + from = kmap_atomic(sg->page, KM_USER0); memcpy(p, - from + sg[i].offset, - sg[i].length); + from + sg->offset, + sg->length); kunmap_atomic(from, KM_USER0); - p += sg[i].length; + p += sg->length; } } @@ -176,7 +178,7 @@ void iser_finalize_rdma_unaligned_sg(struct iscsi_iser_cmd_task *iser_ctask, if (cmd_dir == ISER_DIR_IN) { char *mem; - struct scatterlist *sg; + struct scatterlist *sgl, *sg; unsigned char *p, *to; unsigned int sg_size; int i; @@ -184,16 +186,17 @@ void iser_finalize_rdma_unaligned_sg(struct iscsi_iser_cmd_task *iser_ctask, /* copy back read RDMA to unaligned sg */ mem = mem_copy->copy_buf; - sg = (struct scatterlist *)iser_ctask->data[ISER_DIR_IN].buf; + sgl = (struct scatterlist *)iser_ctask->data[ISER_DIR_IN].buf; sg_size = iser_ctask->data[ISER_DIR_IN].size; - for (p = mem, i = 0; i < sg_size; i++){ - to = kmap_atomic(sg[i].page, KM_SOFTIRQ0); - memcpy(to + sg[i].offset, + p = mem; + for_each_sg(sgl, sg, sg_size, i) { + to = kmap_atomic(sg->page, KM_SOFTIRQ0); + memcpy(to + sg->offset, p, - sg[i].length); + sg->length); kunmap_atomic(to, KM_SOFTIRQ0); - p += sg[i].length; + p += sg->length; } } @@ -224,7 +227,8 @@ static int iser_sg_to_page_vec(struct iser_data_buf *data, struct iser_page_vec *page_vec, struct ib_device *ibdev) { - struct scatterlist *sg = (struct scatterlist *)data->buf; + struct scatterlist *sgl = (struct scatterlist *)data->buf; + struct scatterlist *sg; u64 first_addr, last_addr, page; int end_aligned; unsigned int cur_page = 0; @@ -232,24 +236,25 @@ static int iser_sg_to_page_vec(struct iser_data_buf *data, int i; /* compute the offset of first element */ - page_vec->offset = (u64) sg[0].offset & ~MASK_4K; + page_vec->offset = (u64) sgl[0].offset & ~MASK_4K; - for (i = 0; i < data->dma_nents; i++) { - unsigned int dma_len = ib_sg_dma_len(ibdev, &sg[i]); + for_each_sg(sgl, sg, data->dma_nents, i) { + unsigned int dma_len = ib_sg_dma_len(ibdev, sg); total_sz += dma_len; - first_addr = ib_sg_dma_address(ibdev, &sg[i]); + first_addr = ib_sg_dma_address(ibdev, sg); last_addr = first_addr + dma_len; end_aligned = !(last_addr & ~MASK_4K); /* continue to collect page fragments till aligned or SG ends */ while (!end_aligned && (i + 1 < data->dma_nents)) { + sg = sg_next(sg); i++; - dma_len = ib_sg_dma_len(ibdev, &sg[i]); + dma_len = ib_sg_dma_len(ibdev, sg); total_sz += dma_len; - last_addr = ib_sg_dma_address(ibdev, &sg[i]) + dma_len; + last_addr = ib_sg_dma_address(ibdev, sg) + dma_len; end_aligned = !(last_addr & ~MASK_4K); } @@ -284,25 +289,26 @@ static int iser_sg_to_page_vec(struct iser_data_buf *data, static unsigned int iser_data_buf_aligned_len(struct iser_data_buf *data, struct ib_device *ibdev) { - struct scatterlist *sg; + struct scatterlist *sgl, *sg; u64 end_addr, next_addr; int i, cnt; unsigned int ret_len = 0; - sg = (struct scatterlist *)data->buf; + sgl = (struct scatterlist *)data->buf; - for (cnt = 0, i = 0; i < data->dma_nents; i++, cnt++) { + cnt = 0; + for_each_sg(sgl, sg, data->dma_nents, i) { /* iser_dbg("Checking sg iobuf [%d]: phys=0x%08lX " "offset: %ld sz: %ld\n", i, - (unsigned long)page_to_phys(sg[i].page), - (unsigned long)sg[i].offset, - (unsigned long)sg[i].length); */ - end_addr = ib_sg_dma_address(ibdev, &sg[i]) + - ib_sg_dma_len(ibdev, &sg[i]); + (unsigned long)page_to_phys(sg->page), + (unsigned long)sg->offset, + (unsigned long)sg->length); */ + end_addr = ib_sg_dma_address(ibdev, sg) + + ib_sg_dma_len(ibdev, sg); /* iser_dbg("Checking sg iobuf end address " "0x%08lX\n", end_addr); */ if (i + 1 < data->dma_nents) { - next_addr = ib_sg_dma_address(ibdev, &sg[i+1]); + next_addr = ib_sg_dma_address(ibdev, sg_next(sg)); /* are i, i+1 fragments of the same page? */ if (end_addr == next_addr) continue; @@ -322,15 +328,16 @@ static unsigned int iser_data_buf_aligned_len(struct iser_data_buf *data, static void iser_data_buf_dump(struct iser_data_buf *data, struct ib_device *ibdev) { - struct scatterlist *sg = (struct scatterlist *)data->buf; + struct scatterlist *sgl = (struct scatterlist *)data->buf; + struct scatterlist *sg; int i; - for (i = 0; i < data->dma_nents; i++) + for_each_sg(sgl, sg, data->dma_nents, i) iser_err("sg[%d] dma_addr:0x%lX page:0x%p " "off:0x%x sz:0x%x dma_len:0x%x\n", - i, (unsigned long)ib_sg_dma_address(ibdev, &sg[i]), - sg[i].page, sg[i].offset, - sg[i].length, ib_sg_dma_len(ibdev, &sg[i])); + i, (unsigned long)ib_sg_dma_address(ibdev, sg), + sg->page, sg->offset, + sg->length, ib_sg_dma_len(ibdev, sg)); } static void iser_dump_page_vec(struct iser_page_vec *page_vec) diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c index 8216a6f75be5..64fee90bb68b 100644 --- a/drivers/md/dm-crypt.c +++ b/drivers/md/dm-crypt.c @@ -441,33 +441,12 @@ static struct bio *crypt_alloc_buffer(struct dm_crypt_io *io, unsigned size) return clone; } -static void crypt_free_buffer_pages(struct crypt_config *cc, - struct bio *clone, unsigned int bytes) +static void crypt_free_buffer_pages(struct crypt_config *cc, struct bio *clone) { - unsigned int i, start, end; + unsigned int i; struct bio_vec *bv; - /* - * This is ugly, but Jens Axboe thinks that using bi_idx in the - * endio function is too dangerous at the moment, so I calculate the - * correct position using bi_vcnt and bi_size. - * The bv_offset and bv_len fields might already be modified but we - * know that we always allocated whole pages. - * A fix to the bi_idx issue in the kernel is in the works, so - * we will hopefully be able to revert to the cleaner solution soon. - */ - i = clone->bi_vcnt - 1; - bv = bio_iovec_idx(clone, i); - end = (i << PAGE_SHIFT) + (bv->bv_offset + bv->bv_len) - clone->bi_size; - start = end - bytes; - - start >>= PAGE_SHIFT; - if (!clone->bi_size) - end = clone->bi_vcnt; - else - end >>= PAGE_SHIFT; - - for (i = start; i < end; i++) { + for (i = 0; i < clone->bi_vcnt; i++) { bv = bio_iovec_idx(clone, i); BUG_ON(!bv->bv_page); mempool_free(bv->bv_page, cc->page_pool); @@ -519,7 +498,7 @@ static void crypt_endio(struct bio *clone, int error) * free the processed pages */ if (!read_io) { - crypt_free_buffer_pages(cc, clone, clone->bi_size); + crypt_free_buffer_pages(cc, clone); goto out; } @@ -608,7 +587,7 @@ static void process_write(struct dm_crypt_io *io) ctx.idx_out = 0; if (unlikely(crypt_convert(cc, &ctx) < 0)) { - crypt_free_buffer_pages(cc, clone, clone->bi_size); + crypt_free_buffer_pages(cc, clone); bio_put(clone); dec_pending(io, -EIO); return; diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index 2bcde5798b5a..fbe477bb2c68 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -999,33 +999,6 @@ void dm_table_unplug_all(struct dm_table *t) } } -int dm_table_flush_all(struct dm_table *t) -{ - struct list_head *d, *devices = dm_table_get_devices(t); - int ret = 0; - unsigned i; - - for (i = 0; i < t->num_targets; i++) - if (t->targets[i].type->flush) - t->targets[i].type->flush(&t->targets[i]); - - for (d = devices->next; d != devices; d = d->next) { - struct dm_dev *dd = list_entry(d, struct dm_dev, list); - struct request_queue *q = bdev_get_queue(dd->bdev); - int err; - - if (!q->issue_flush_fn) - err = -EOPNOTSUPP; - else - err = q->issue_flush_fn(q, dd->bdev->bd_disk, NULL); - - if (!ret) - ret = err; - } - - return ret; -} - struct mapped_device *dm_table_get_md(struct dm_table *t) { dm_get(t->md); @@ -1043,4 +1016,3 @@ EXPORT_SYMBOL(dm_table_get_md); EXPORT_SYMBOL(dm_table_put); EXPORT_SYMBOL(dm_table_get); EXPORT_SYMBOL(dm_table_unplug_all); -EXPORT_SYMBOL(dm_table_flush_all); diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 167765c47747..d837d37f6209 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -840,21 +840,6 @@ static int dm_request(struct request_queue *q, struct bio *bio) return 0; } -static int dm_flush_all(struct request_queue *q, struct gendisk *disk, - sector_t *error_sector) -{ - struct mapped_device *md = q->queuedata; - struct dm_table *map = dm_get_table(md); - int ret = -ENXIO; - - if (map) { - ret = dm_table_flush_all(map); - dm_table_put(map); - } - - return ret; -} - static void dm_unplug_all(struct request_queue *q) { struct mapped_device *md = q->queuedata; @@ -1003,7 +988,6 @@ static struct mapped_device *alloc_dev(int minor) blk_queue_make_request(md->queue, dm_request); blk_queue_bounce_limit(md->queue, BLK_BOUNCE_ANY); md->queue->unplug_fn = dm_unplug_all; - md->queue->issue_flush_fn = dm_flush_all; md->io_pool = mempool_create_slab_pool(MIN_IOS, _io_cache); if (!md->io_pool) diff --git a/drivers/md/dm.h b/drivers/md/dm.h index 462ee652a890..4b3faa45277e 100644 --- a/drivers/md/dm.h +++ b/drivers/md/dm.h @@ -111,7 +111,6 @@ void dm_table_postsuspend_targets(struct dm_table *t); int dm_table_resume_targets(struct dm_table *t); int dm_table_any_congested(struct dm_table *t, int bdi_bits); void dm_table_unplug_all(struct dm_table *t); -int dm_table_flush_all(struct dm_table *t); /*----------------------------------------------------------------- * A registry of target types. diff --git a/drivers/md/linear.c b/drivers/md/linear.c index 550148770bb2..56a11f6c127b 100644 --- a/drivers/md/linear.c +++ b/drivers/md/linear.c @@ -92,25 +92,6 @@ static void linear_unplug(struct request_queue *q) } } -static int linear_issue_flush(struct request_queue *q, struct gendisk *disk, - sector_t *error_sector) -{ - mddev_t *mddev = q->queuedata; - linear_conf_t *conf = mddev_to_conf(mddev); - int i, ret = 0; - - for (i=0; i < mddev->raid_disks && ret == 0; i++) { - struct block_device *bdev = conf->disks[i].rdev->bdev; - struct request_queue *r_queue = bdev_get_queue(bdev); - - if (!r_queue->issue_flush_fn) - ret = -EOPNOTSUPP; - else - ret = r_queue->issue_flush_fn(r_queue, bdev->bd_disk, error_sector); - } - return ret; -} - static int linear_congested(void *data, int bits) { mddev_t *mddev = data; @@ -279,7 +260,6 @@ static int linear_run (mddev_t *mddev) blk_queue_merge_bvec(mddev->queue, linear_mergeable_bvec); mddev->queue->unplug_fn = linear_unplug; - mddev->queue->issue_flush_fn = linear_issue_flush; mddev->queue->backing_dev_info.congested_fn = linear_congested; mddev->queue->backing_dev_info.congested_data = mddev; return 0; diff --git a/drivers/md/md.c b/drivers/md/md.c index acf1b81b47cb..0dc563d76b39 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -3463,7 +3463,6 @@ static int do_md_stop(mddev_t * mddev, int mode) mddev->pers->stop(mddev); mddev->queue->merge_bvec_fn = NULL; mddev->queue->unplug_fn = NULL; - mddev->queue->issue_flush_fn = NULL; mddev->queue->backing_dev_info.congested_fn = NULL; if (mddev->pers->sync_request) sysfs_remove_group(&mddev->kobj, &md_redundancy_group); diff --git a/drivers/md/multipath.c b/drivers/md/multipath.c index f2a63f394ad9..b35731cceac6 100644 --- a/drivers/md/multipath.c +++ b/drivers/md/multipath.c @@ -194,35 +194,6 @@ static void multipath_status (struct seq_file *seq, mddev_t *mddev) seq_printf (seq, "]"); } -static int multipath_issue_flush(struct request_queue *q, struct gendisk *disk, - sector_t *error_sector) -{ - mddev_t *mddev = q->queuedata; - multipath_conf_t *conf = mddev_to_conf(mddev); - int i, ret = 0; - - rcu_read_lock(); - for (i=0; i<mddev->raid_disks && ret == 0; i++) { - mdk_rdev_t *rdev = rcu_dereference(conf->multipaths[i].rdev); - if (rdev && !test_bit(Faulty, &rdev->flags)) { - struct block_device *bdev = rdev->bdev; - struct request_queue *r_queue = bdev_get_queue(bdev); - - if (!r_queue->issue_flush_fn) - ret = -EOPNOTSUPP; - else { - atomic_inc(&rdev->nr_pending); - rcu_read_unlock(); - ret = r_queue->issue_flush_fn(r_queue, bdev->bd_disk, - error_sector); - rdev_dec_pending(rdev, mddev); - rcu_read_lock(); - } - } - } - rcu_read_unlock(); - return ret; -} static int multipath_congested(void *data, int bits) { mddev_t *mddev = data; @@ -527,7 +498,6 @@ static int multipath_run (mddev_t *mddev) mddev->array_size = mddev->size; mddev->queue->unplug_fn = multipath_unplug; - mddev->queue->issue_flush_fn = multipath_issue_flush; mddev->queue->backing_dev_info.congested_fn = multipath_congested; mddev->queue->backing_dev_info.congested_data = mddev; diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c index ef0da2d84959..e79e1a538d44 100644 --- a/drivers/md/raid0.c +++ b/drivers/md/raid0.c @@ -40,26 +40,6 @@ static void raid0_unplug(struct request_queue *q) } } -static int raid0_issue_flush(struct request_queue *q, struct gendisk *disk, - sector_t *error_sector) -{ - mddev_t *mddev = q->queuedata; - raid0_conf_t *conf = mddev_to_conf(mddev); - mdk_rdev_t **devlist = conf->strip_zone[0].dev; - int i, ret = 0; - - for (i=0; i<mddev->raid_disks && ret == 0; i++) { - struct block_device *bdev = devlist[i]->bdev; - struct request_queue *r_queue = bdev_get_queue(bdev); - - if (!r_queue->issue_flush_fn) - ret = -EOPNOTSUPP; - else - ret = r_queue->issue_flush_fn(r_queue, bdev->bd_disk, error_sector); - } - return ret; -} - static int raid0_congested(void *data, int bits) { mddev_t *mddev = data; @@ -250,7 +230,6 @@ static int create_strip_zones (mddev_t *mddev) mddev->queue->unplug_fn = raid0_unplug; - mddev->queue->issue_flush_fn = raid0_issue_flush; mddev->queue->backing_dev_info.congested_fn = raid0_congested; mddev->queue->backing_dev_info.congested_data = mddev; diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index 6d03bea6fa58..0bcefad82413 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -567,36 +567,6 @@ static void raid1_unplug(struct request_queue *q) md_wakeup_thread(mddev->thread); } -static int raid1_issue_flush(struct request_queue *q, struct gendisk *disk, - sector_t *error_sector) -{ - mddev_t *mddev = q->queuedata; - conf_t *conf = mddev_to_conf(mddev); - int i, ret = 0; - - rcu_read_lock(); - for (i=0; i<mddev->raid_disks && ret == 0; i++) { - mdk_rdev_t *rdev = rcu_dereference(conf->mirrors[i].rdev); - if (rdev && !test_bit(Faulty, &rdev->flags)) { - struct block_device *bdev = rdev->bdev; - struct request_queue *r_queue = bdev_get_queue(bdev); - - if (!r_queue->issue_flush_fn) - ret = -EOPNOTSUPP; - else { - atomic_inc(&rdev->nr_pending); - rcu_read_unlock(); - ret = r_queue->issue_flush_fn(r_queue, bdev->bd_disk, - error_sector); - rdev_dec_pending(rdev, mddev); - rcu_read_lock(); - } - } - } - rcu_read_unlock(); - return ret; -} - static int raid1_congested(void *data, int bits) { mddev_t *mddev = data; @@ -1997,7 +1967,6 @@ static int run(mddev_t *mddev) mddev->array_size = mddev->size; mddev->queue->unplug_fn = raid1_unplug; - mddev->queue->issue_flush_fn = raid1_issue_flush; mddev->queue->backing_dev_info.congested_fn = raid1_congested; mddev->queue->backing_dev_info.congested_data = mddev; diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index 25a96c42bdb0..fc6607acb6e4 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -611,36 +611,6 @@ static void raid10_unplug(struct request_queue *q) md_wakeup_thread(mddev->thread); } -static int raid10_issue_flush(struct request_queue *q, struct gendisk *disk, - sector_t *error_sector) -{ - mddev_t *mddev = q->queuedata; - conf_t *conf = mddev_to_conf(mddev); - int i, ret = 0; - - rcu_read_lock(); - for (i=0; i<mddev->raid_disks && ret == 0; i++) { - mdk_rdev_t *rdev = rcu_dereference(conf->mirrors[i].rdev); - if (rdev && !test_bit(Faulty, &rdev->flags)) { - struct block_device *bdev = rdev->bdev; - struct request_queue *r_queue = bdev_get_queue(bdev); - - if (!r_queue->issue_flush_fn) - ret = -EOPNOTSUPP; - else { - atomic_inc(&rdev->nr_pending); - rcu_read_unlock(); - ret = r_queue->issue_flush_fn(r_queue, bdev->bd_disk, - error_sector); - rdev_dec_pending(rdev, mddev); - rcu_read_lock(); - } - } - } - rcu_read_unlock(); - return ret; -} - static int raid10_congested(void *data, int bits) { mddev_t *mddev = data; @@ -2118,7 +2088,6 @@ static int run(mddev_t *mddev) mddev->resync_max_sectors = size << conf->chunk_shift; mddev->queue->unplug_fn = raid10_unplug; - mddev->queue->issue_flush_fn = raid10_issue_flush; mddev->queue->backing_dev_info.congested_fn = raid10_congested; mddev->queue->backing_dev_info.congested_data = mddev; diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index caaca9e178bc..8ee181a01f52 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -3204,36 +3204,6 @@ static void raid5_unplug_device(struct request_queue *q) unplug_slaves(mddev); } -static int raid5_issue_flush(struct request_queue *q, struct gendisk *disk, - sector_t *error_sector) -{ - mddev_t *mddev = q->queuedata; - raid5_conf_t *conf = mddev_to_conf(mddev); - int i, ret = 0; - - rcu_read_lock(); - for (i=0; i<mddev->raid_disks && ret == 0; i++) { - mdk_rdev_t *rdev = rcu_dereference(conf->disks[i].rdev); - if (rdev && !test_bit(Faulty, &rdev->flags)) { - struct block_device *bdev = rdev->bdev; - struct request_queue *r_queue = bdev_get_queue(bdev); - - if (!r_queue->issue_flush_fn) - ret = -EOPNOTSUPP; - else { - atomic_inc(&rdev->nr_pending); - rcu_read_unlock(); - ret = r_queue->issue_flush_fn(r_queue, bdev->bd_disk, - error_sector); - rdev_dec_pending(rdev, mddev); - rcu_read_lock(); - } - } - } - rcu_read_unlock(); - return ret; -} - static int raid5_congested(void *data, int bits) { mddev_t *mddev = data; @@ -4263,7 +4233,6 @@ static int run(mddev_t *mddev) mdname(mddev)); mddev->queue->unplug_fn = raid5_unplug_device; - mddev->queue->issue_flush_fn = raid5_issue_flush; mddev->queue->backing_dev_info.congested_data = mddev; mddev->queue->backing_dev_info.congested_fn = raid5_congested; diff --git a/drivers/message/fusion/mptscsih.c b/drivers/message/fusion/mptscsih.c index 822a3aa4fae5..626bb3c9af2b 100644 --- a/drivers/message/fusion/mptscsih.c +++ b/drivers/message/fusion/mptscsih.c @@ -293,7 +293,7 @@ nextSGEset: for (ii=0; ii < (numSgeThisFrame-1); ii++) { thisxfer = sg_dma_len(sg); if (thisxfer == 0) { - sg ++; /* Get next SG element from the OS */ + sg = sg_next(sg); /* Get next SG element from the OS */ sg_done++; continue; } @@ -301,7 +301,7 @@ nextSGEset: v2 = sg_dma_address(sg); mptscsih_add_sge(psge, sgflags | thisxfer, v2); - sg++; /* Get next SG element from the OS */ + sg = sg_next(sg); /* Get next SG element from the OS */ psge += (sizeof(u32) + sizeof(dma_addr_t)); sgeOffset += (sizeof(u32) + sizeof(dma_addr_t)); sg_done++; @@ -322,7 +322,7 @@ nextSGEset: v2 = sg_dma_address(sg); mptscsih_add_sge(psge, sgflags | thisxfer, v2); /* - sg++; + sg = sg_next(sg); psge += (sizeof(u32) + sizeof(dma_addr_t)); */ sgeOffset += (sizeof(u32) + sizeof(dma_addr_t)); diff --git a/drivers/message/i2o/i2o_block.c b/drivers/message/i2o/i2o_block.c index 50b2c7334410..d602ba6d5417 100644 --- a/drivers/message/i2o/i2o_block.c +++ b/drivers/message/i2o/i2o_block.c @@ -149,29 +149,6 @@ static int i2o_block_device_flush(struct i2o_device *dev) }; /** - * i2o_block_issue_flush - device-flush interface for block-layer - * @queue: the request queue of the device which should be flushed - * @disk: gendisk - * @error_sector: error offset - * - * Helper function to provide flush functionality to block-layer. - * - * Returns 0 on success or negative error code on failure. - */ - -static int i2o_block_issue_flush(struct request_queue * queue, struct gendisk *disk, - sector_t * error_sector) -{ - struct i2o_block_device *i2o_blk_dev = queue->queuedata; - int rc = -ENODEV; - - if (likely(i2o_blk_dev)) - rc = i2o_block_device_flush(i2o_blk_dev->i2o_dev); - - return rc; -} - -/** * i2o_block_device_mount - Mount (load) the media of device dev * @dev: I2O device which should receive the mount request * @media_id: Media Identifier @@ -1009,7 +986,6 @@ static struct i2o_block_device *i2o_block_device_alloc(void) } blk_queue_prep_rq(queue, i2o_block_prep_req_fn); - blk_queue_issue_flush_fn(queue, i2o_block_issue_flush); gd->major = I2O_MAJOR; gd->queue = queue; diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c index b0abc7d92805..a5d0354bbbda 100644 --- a/drivers/mmc/card/queue.c +++ b/drivers/mmc/card/queue.c @@ -153,14 +153,14 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, spinlock_t *lock blk_queue_max_hw_segments(mq->queue, bouncesz / 512); blk_queue_max_segment_size(mq->queue, bouncesz); - mq->sg = kmalloc(sizeof(struct scatterlist), + mq->sg = kzalloc(sizeof(struct scatterlist), GFP_KERNEL); if (!mq->sg) { ret = -ENOMEM; goto cleanup_queue; } - mq->bounce_sg = kmalloc(sizeof(struct scatterlist) * + mq->bounce_sg = kzalloc(sizeof(struct scatterlist) * bouncesz / 512, GFP_KERNEL); if (!mq->bounce_sg) { ret = -ENOMEM; @@ -177,7 +177,7 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, spinlock_t *lock blk_queue_max_hw_segments(mq->queue, host->max_hw_segs); blk_queue_max_segment_size(mq->queue, host->max_seg_size); - mq->sg = kmalloc(sizeof(struct scatterlist) * + mq->sg = kzalloc(sizeof(struct scatterlist) * host->max_phys_segs, GFP_KERNEL); if (!mq->sg) { ret = -ENOMEM; diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h index 16e5563e0c65..57cac7008e0b 100644 --- a/drivers/s390/scsi/zfcp_def.h +++ b/drivers/s390/scsi/zfcp_def.h @@ -34,6 +34,7 @@ #include <linux/slab.h> #include <linux/mempool.h> #include <linux/syscalls.h> +#include <linux/scatterlist.h> #include <linux/ioctl.h> #include <scsi/scsi.h> #include <scsi/scsi_tcq.h> diff --git a/drivers/s390/scsi/zfcp_qdio.c b/drivers/s390/scsi/zfcp_qdio.c index 3f105fdcf239..51d92b196ee7 100644 --- a/drivers/s390/scsi/zfcp_qdio.c +++ b/drivers/s390/scsi/zfcp_qdio.c @@ -590,7 +590,7 @@ zfcp_qdio_sbals_from_segment(struct zfcp_fsf_req *fsf_req, unsigned long sbtype, */ int zfcp_qdio_sbals_from_sg(struct zfcp_fsf_req *fsf_req, unsigned long sbtype, - struct scatterlist *sg, int sg_count, int max_sbals) + struct scatterlist *sgl, int sg_count, int max_sbals) { int sg_index; struct scatterlist *sg_segment; @@ -606,9 +606,7 @@ zfcp_qdio_sbals_from_sg(struct zfcp_fsf_req *fsf_req, unsigned long sbtype, sbale->flags |= sbtype; /* process all segements of scatter-gather list */ - for (sg_index = 0, sg_segment = sg, bytes = 0; - sg_index < sg_count; - sg_index++, sg_segment++) { + for_each_sg(sgl, sg_segment, sg_count, sg_index) { retval = zfcp_qdio_sbals_from_segment( fsf_req, sbtype, diff --git a/drivers/scsi/3w-9xxx.c b/drivers/scsi/3w-9xxx.c index efd9d8d3a890..fb14014ee16e 100644 --- a/drivers/scsi/3w-9xxx.c +++ b/drivers/scsi/3w-9xxx.c @@ -1990,6 +1990,7 @@ static struct scsi_host_template driver_template = { .max_sectors = TW_MAX_SECTORS, .cmd_per_lun = TW_MAX_CMDS_PER_LUN, .use_clustering = ENABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, .shost_attrs = twa_host_attrs, .emulated = 1 }; diff --git a/drivers/scsi/3w-xxxx.c b/drivers/scsi/3w-xxxx.c index c7995fc216e8..a64153b96034 100644 --- a/drivers/scsi/3w-xxxx.c +++ b/drivers/scsi/3w-xxxx.c @@ -2261,6 +2261,7 @@ static struct scsi_host_template driver_template = { .max_sectors = TW_MAX_SECTORS, .cmd_per_lun = TW_MAX_CMDS_PER_LUN, .use_clustering = ENABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, .shost_attrs = tw_host_attrs, .emulated = 1 }; diff --git a/drivers/scsi/BusLogic.c b/drivers/scsi/BusLogic.c index 9b206176f717..49e1ffa4b2ff 100644 --- a/drivers/scsi/BusLogic.c +++ b/drivers/scsi/BusLogic.c @@ -3575,6 +3575,7 @@ static struct scsi_host_template Bus_Logic_template = { .unchecked_isa_dma = 1, .max_sectors = 128, .use_clustering = ENABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, }; /* diff --git a/drivers/scsi/NCR53c406a.c b/drivers/scsi/NCR53c406a.c index eda8c48f6be7..3168a1794849 100644 --- a/drivers/scsi/NCR53c406a.c +++ b/drivers/scsi/NCR53c406a.c @@ -1066,7 +1066,8 @@ static struct scsi_host_template driver_template = .sg_tablesize = 32 /*SG_ALL*/ /*SG_NONE*/, .cmd_per_lun = 1 /* commands per lun */, .unchecked_isa_dma = 1 /* unchecked_isa_dma */, - .use_clustering = ENABLE_CLUSTERING + .use_clustering = ENABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, }; #include "scsi_module.c" diff --git a/drivers/scsi/a100u2w.c b/drivers/scsi/a100u2w.c index f608d4a1d6da..d3a6d15fb77a 100644 --- a/drivers/scsi/a100u2w.c +++ b/drivers/scsi/a100u2w.c @@ -1071,6 +1071,7 @@ static struct scsi_host_template inia100_template = { .sg_tablesize = SG_ALL, .cmd_per_lun = 1, .use_clustering = ENABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, }; static int __devinit inia100_probe_one(struct pci_dev *pdev, diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c index a7f42a17b5c7..038980be763d 100644 --- a/drivers/scsi/aacraid/linit.c +++ b/drivers/scsi/aacraid/linit.c @@ -944,6 +944,7 @@ static struct scsi_host_template aac_driver_template = { .cmd_per_lun = AAC_NUM_IO_FIB, #endif .use_clustering = ENABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, .emulated = 1, }; diff --git a/drivers/scsi/aha1542.c b/drivers/scsi/aha1542.c index cbbfbc9f3e0f..961a1882cb7e 100644 --- a/drivers/scsi/aha1542.c +++ b/drivers/scsi/aha1542.c @@ -61,15 +61,15 @@ static void BAD_DMA(void *address, unsigned int length) } static void BAD_SG_DMA(Scsi_Cmnd * SCpnt, - struct scatterlist *sgpnt, + struct scatterlist *sgp, int nseg, int badseg) { printk(KERN_CRIT "sgpnt[%d:%d] page %p/0x%llx length %u\n", badseg, nseg, - page_address(sgpnt[badseg].page) + sgpnt[badseg].offset, - (unsigned long long)SCSI_SG_PA(&sgpnt[badseg]), - sgpnt[badseg].length); + page_address(sgp->page) + sgp->offset, + (unsigned long long)SCSI_SG_PA(sgp), + sgp->length); /* * Not safe to continue. @@ -691,7 +691,7 @@ static int aha1542_queuecommand(Scsi_Cmnd * SCpnt, void (*done) (Scsi_Cmnd *)) memcpy(ccb[mbo].cdb, cmd, ccb[mbo].cdblen); if (SCpnt->use_sg) { - struct scatterlist *sgpnt; + struct scatterlist *sg; struct chain *cptr; #ifdef DEBUG unsigned char *ptr; @@ -699,23 +699,21 @@ static int aha1542_queuecommand(Scsi_Cmnd * SCpnt, void (*done) (Scsi_Cmnd *)) int i; ccb[mbo].op = 2; /* SCSI Initiator Command w/scatter-gather */ SCpnt->host_scribble = kmalloc(512, GFP_KERNEL | GFP_DMA); - sgpnt = (struct scatterlist *) SCpnt->request_buffer; cptr = (struct chain *) SCpnt->host_scribble; if (cptr == NULL) { /* free the claimed mailbox slot */ HOSTDATA(SCpnt->device->host)->SCint[mbo] = NULL; return SCSI_MLQUEUE_HOST_BUSY; } - for (i = 0; i < SCpnt->use_sg; i++) { - if (sgpnt[i].length == 0 || SCpnt->use_sg > 16 || - (((int) sgpnt[i].offset) & 1) || (sgpnt[i].length & 1)) { + scsi_for_each_sg(SCpnt, sg, SCpnt->use_sg, i) { + if (sg->length == 0 || SCpnt->use_sg > 16 || + (((int) sg->offset) & 1) || (sg->length & 1)) { unsigned char *ptr; printk(KERN_CRIT "Bad segment list supplied to aha1542.c (%d, %d)\n", SCpnt->use_sg, i); - for (i = 0; i < SCpnt->use_sg; i++) { + scsi_for_each_sg(SCpnt, sg, SCpnt->use_sg, i) { printk(KERN_CRIT "%d: %p %d\n", i, - (page_address(sgpnt[i].page) + - sgpnt[i].offset), - sgpnt[i].length); + (page_address(sg->page) + + sg->offset), sg->length); }; printk(KERN_CRIT "cptr %x: ", (unsigned int) cptr); ptr = (unsigned char *) &cptr[i]; @@ -723,10 +721,10 @@ static int aha1542_queuecommand(Scsi_Cmnd * SCpnt, void (*done) (Scsi_Cmnd *)) printk("%02x ", ptr[i]); panic("Foooooooood fight!"); }; - any2scsi(cptr[i].dataptr, SCSI_SG_PA(&sgpnt[i])); - if (SCSI_SG_PA(&sgpnt[i]) + sgpnt[i].length - 1 > ISA_DMA_THRESHOLD) - BAD_SG_DMA(SCpnt, sgpnt, SCpnt->use_sg, i); - any2scsi(cptr[i].datalen, sgpnt[i].length); + any2scsi(cptr[i].dataptr, SCSI_SG_PA(sg)); + if (SCSI_SG_PA(sg) + sg->length - 1 > ISA_DMA_THRESHOLD) + BAD_SG_DMA(SCpnt, sg, SCpnt->use_sg, i); + any2scsi(cptr[i].datalen, sg->length); }; any2scsi(ccb[mbo].datalen, SCpnt->use_sg * sizeof(struct chain)); any2scsi(ccb[mbo].dataptr, SCSI_BUF_PA(cptr)); diff --git a/drivers/scsi/aha1740.c b/drivers/scsi/aha1740.c index e4a4f3a965d9..f6722fd46008 100644 --- a/drivers/scsi/aha1740.c +++ b/drivers/scsi/aha1740.c @@ -563,6 +563,7 @@ static struct scsi_host_template aha1740_template = { .sg_tablesize = AHA1740_SCATTER, .cmd_per_lun = AHA1740_CMDLUN, .use_clustering = ENABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, .eh_abort_handler = aha1740_eh_abort_handler, }; diff --git a/drivers/scsi/aic7xxx/aic79xx_osm.c b/drivers/scsi/aic7xxx/aic79xx_osm.c index a055a96e3ad3..42c0f14a262c 100644 --- a/drivers/scsi/aic7xxx/aic79xx_osm.c +++ b/drivers/scsi/aic7xxx/aic79xx_osm.c @@ -766,6 +766,7 @@ struct scsi_host_template aic79xx_driver_template = { .max_sectors = 8192, .cmd_per_lun = 2, .use_clustering = ENABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, .slave_alloc = ahd_linux_slave_alloc, .slave_configure = ahd_linux_slave_configure, .target_alloc = ahd_linux_target_alloc, diff --git a/drivers/scsi/aic7xxx/aic7xxx_osm.c b/drivers/scsi/aic7xxx/aic7xxx_osm.c index 2e9c38f2e8a6..7770befbf50c 100644 --- a/drivers/scsi/aic7xxx/aic7xxx_osm.c +++ b/drivers/scsi/aic7xxx/aic7xxx_osm.c @@ -747,6 +747,7 @@ struct scsi_host_template aic7xxx_driver_template = { .max_sectors = 8192, .cmd_per_lun = 2, .use_clustering = ENABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, .slave_alloc = ahc_linux_slave_alloc, .slave_configure = ahc_linux_slave_configure, .target_alloc = ahc_linux_target_alloc, diff --git a/drivers/scsi/aic7xxx_old.c b/drivers/scsi/aic7xxx_old.c index 1a71b0236c97..4025608d6964 100644 --- a/drivers/scsi/aic7xxx_old.c +++ b/drivers/scsi/aic7xxx_old.c @@ -11142,6 +11142,7 @@ static struct scsi_host_template driver_template = { .max_sectors = 2048, .cmd_per_lun = 3, .use_clustering = ENABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, }; #include "scsi_module.c" diff --git a/drivers/scsi/aic94xx/aic94xx_task.c b/drivers/scsi/aic94xx/aic94xx_task.c index f2b23e01401a..ee0a98bffcd4 100644 --- a/drivers/scsi/aic94xx/aic94xx_task.c +++ b/drivers/scsi/aic94xx/aic94xx_task.c @@ -94,7 +94,7 @@ static inline int asd_map_scatterlist(struct sas_task *task, res = -ENOMEM; goto err_unmap; } - for (sc = task->scatter, i = 0; i < num_sg; i++, sc++) { + for_each_sg(task->scatter, sc, num_sg, i) { struct sg_el *sg = &((struct sg_el *)ascb->sg_arr->vaddr)[i]; sg->bus_addr = cpu_to_le64((u64)sg_dma_address(sc)); @@ -103,7 +103,7 @@ static inline int asd_map_scatterlist(struct sas_task *task, sg->flags |= ASD_SG_EL_LIST_EOL; } - for (sc = task->scatter, i = 0; i < 2; i++, sc++) { + for_each_sg(task->scatter, sc, 2, i) { sg_arr[i].bus_addr = cpu_to_le64((u64)sg_dma_address(sc)); sg_arr[i].size = cpu_to_le32((u32)sg_dma_len(sc)); @@ -115,7 +115,7 @@ static inline int asd_map_scatterlist(struct sas_task *task, sg_arr[2].bus_addr=cpu_to_le64((u64)ascb->sg_arr->dma_handle); } else { int i; - for (sc = task->scatter, i = 0; i < num_sg; i++, sc++) { + for_each_sg(task->scatter, sc, num_sg, i) { sg_arr[i].bus_addr = cpu_to_le64((u64)sg_dma_address(sc)); sg_arr[i].size = cpu_to_le32((u32)sg_dma_len(sc)); diff --git a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c index cfcf40159eab..f81777586b8f 100644 --- a/drivers/scsi/arcmsr/arcmsr_hba.c +++ b/drivers/scsi/arcmsr/arcmsr_hba.c @@ -122,6 +122,7 @@ static struct scsi_host_template arcmsr_scsi_host_template = { .max_sectors = ARCMSR_MAX_XFER_SECTORS, .cmd_per_lun = ARCMSR_MAX_CMD_PERLUN, .use_clustering = ENABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, .shost_attrs = arcmsr_host_attrs, }; #ifdef CONFIG_SCSI_ARCMSR_AER diff --git a/drivers/scsi/dc395x.c b/drivers/scsi/dc395x.c index 1591824cf4b3..fd42d4789202 100644 --- a/drivers/scsi/dc395x.c +++ b/drivers/scsi/dc395x.c @@ -4765,6 +4765,7 @@ static struct scsi_host_template dc395x_driver_template = { .eh_bus_reset_handler = dc395x_eh_bus_reset, .unchecked_isa_dma = 0, .use_clustering = DISABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, }; diff --git a/drivers/scsi/dpt_i2o.c b/drivers/scsi/dpt_i2o.c index bea9d659af15..8258506ba7d7 100644 --- a/drivers/scsi/dpt_i2o.c +++ b/drivers/scsi/dpt_i2o.c @@ -3295,6 +3295,7 @@ static struct scsi_host_template adpt_template = { .this_id = 7, .cmd_per_lun = 1, .use_clustering = ENABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, }; static s32 adpt_scsi_register(adpt_hba* pHba) diff --git a/drivers/scsi/eata.c b/drivers/scsi/eata.c index ec2233114bc9..7ead5210de96 100644 --- a/drivers/scsi/eata.c +++ b/drivers/scsi/eata.c @@ -523,7 +523,8 @@ static struct scsi_host_template driver_template = { .slave_configure = eata2x_slave_configure, .this_id = 7, .unchecked_isa_dma = 1, - .use_clustering = ENABLE_CLUSTERING + .use_clustering = ENABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, }; #if !defined(__BIG_ENDIAN_BITFIELD) && !defined(__LITTLE_ENDIAN_BITFIELD) diff --git a/drivers/scsi/hosts.c b/drivers/scsi/hosts.c index adc9559cb6f4..112ab6abe62b 100644 --- a/drivers/scsi/hosts.c +++ b/drivers/scsi/hosts.c @@ -343,6 +343,7 @@ struct Scsi_Host *scsi_host_alloc(struct scsi_host_template *sht, int privsize) shost->use_clustering = sht->use_clustering; shost->ordered_tag = sht->ordered_tag; shost->active_mode = sht->supported_mode; + shost->use_sg_chaining = sht->use_sg_chaining; if (sht->max_host_blocked) shost->max_host_blocked = sht->max_host_blocked; diff --git a/drivers/scsi/hptiop.c b/drivers/scsi/hptiop.c index 8b384fa7f048..8515054cdf70 100644 --- a/drivers/scsi/hptiop.c +++ b/drivers/scsi/hptiop.c @@ -655,6 +655,7 @@ static struct scsi_host_template driver_template = { .unchecked_isa_dma = 0, .emulated = 0, .use_clustering = ENABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, .proc_name = driver_name, .shost_attrs = hptiop_attrs, .this_id = -1, diff --git a/drivers/scsi/ibmmca.c b/drivers/scsi/ibmmca.c index 1a924e9b0271..714e6273a70d 100644 --- a/drivers/scsi/ibmmca.c +++ b/drivers/scsi/ibmmca.c @@ -1501,6 +1501,7 @@ static struct scsi_host_template ibmmca_driver_template = { .sg_tablesize = 16, .cmd_per_lun = 1, .use_clustering = ENABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, }; static int ibmmca_probe(struct device *dev) diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.c b/drivers/scsi/ibmvscsi/ibmvscsi.c index cda0cc3d182f..22d91ee173c5 100644 --- a/drivers/scsi/ibmvscsi/ibmvscsi.c +++ b/drivers/scsi/ibmvscsi/ibmvscsi.c @@ -1548,6 +1548,7 @@ static struct scsi_host_template driver_template = { .this_id = -1, .sg_tablesize = SG_ALL, .use_clustering = ENABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, .shost_attrs = ibmvscsi_attrs, }; diff --git a/drivers/scsi/ide-scsi.c b/drivers/scsi/ide-scsi.c index d81bb076a15a..d297f64cd432 100644 --- a/drivers/scsi/ide-scsi.c +++ b/drivers/scsi/ide-scsi.c @@ -70,6 +70,7 @@ typedef struct idescsi_pc_s { u8 *buffer; /* Data buffer */ u8 *current_position; /* Pointer into the above buffer */ struct scatterlist *sg; /* Scatter gather table */ + struct scatterlist *last_sg; /* Last sg element */ int b_count; /* Bytes transferred from current entry */ struct scsi_cmnd *scsi_cmd; /* SCSI command */ void (*done)(struct scsi_cmnd *); /* Scsi completion routine */ @@ -173,12 +174,6 @@ static void idescsi_input_buffers (ide_drive_t *drive, idescsi_pc_t *pc, unsigne char *buf; while (bcount) { - 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; - } count = min(pc->sg->length - pc->b_count, bcount); if (PageHighMem(pc->sg->page)) { unsigned long flags; @@ -197,10 +192,17 @@ static void idescsi_input_buffers (ide_drive_t *drive, idescsi_pc_t *pc, unsigne } bcount -= count; pc->b_count += count; if (pc->b_count == pc->sg->length) { - pc->sg++; + if (pc->sg == pc->last_sg) + break; + pc->sg = sg_next(pc->sg); pc->b_count = 0; } } + + if (bcount) { + printk (KERN_ERR "ide-scsi: scatter gather table too small, discarding data\n"); + idescsi_discard_data (drive, bcount); + } } static void idescsi_output_buffers (ide_drive_t *drive, idescsi_pc_t *pc, unsigned int bcount) @@ -209,12 +211,6 @@ static void idescsi_output_buffers (ide_drive_t *drive, idescsi_pc_t *pc, unsign char *buf; while (bcount) { - 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; - } count = min(pc->sg->length - pc->b_count, bcount); if (PageHighMem(pc->sg->page)) { unsigned long flags; @@ -233,10 +229,17 @@ static void idescsi_output_buffers (ide_drive_t *drive, idescsi_pc_t *pc, unsign } bcount -= count; pc->b_count += count; if (pc->b_count == pc->sg->length) { - pc->sg++; + if (pc->sg == pc->last_sg) + break; + pc->sg = sg_next(pc->sg); pc->b_count = 0; } } + + if (bcount) { + printk (KERN_ERR "ide-scsi: scatter gather table too small, padding with zeros\n"); + idescsi_output_zeros (drive, bcount); + } } static void hexdump(u8 *x, int len) @@ -804,6 +807,7 @@ static int idescsi_queue (struct scsi_cmnd *cmd, memcpy (pc->c, cmd->cmnd, cmd->cmd_len); pc->buffer = NULL; pc->sg = scsi_sglist(cmd); + pc->last_sg = sg_last(pc->sg, cmd->use_sg); pc->b_count = 0; pc->request_transfer = pc->buffer_size = scsi_bufflen(cmd); pc->scsi_cmd = cmd; diff --git a/drivers/scsi/initio.c b/drivers/scsi/initio.c index d9dfb69ae031..22d40fd5845b 100644 --- a/drivers/scsi/initio.c +++ b/drivers/scsi/initio.c @@ -2831,6 +2831,7 @@ static struct scsi_host_template initio_template = { .sg_tablesize = SG_ALL, .cmd_per_lun = 1, .use_clustering = ENABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, }; static int initio_probe_one(struct pci_dev *pdev, diff --git a/drivers/scsi/ips.c b/drivers/scsi/ips.c index 2ed099e2c20d..edaac2714c5a 100644 --- a/drivers/scsi/ips.c +++ b/drivers/scsi/ips.c @@ -3252,7 +3252,7 @@ ips_done(ips_ha_t * ha, ips_scb_t * scb) */ if ((scb->breakup) || (scb->sg_break)) { struct scatterlist *sg; - int sg_dma_index, ips_sg_index = 0; + int i, sg_dma_index, ips_sg_index = 0; /* we had a data breakup */ scb->data_len = 0; @@ -3261,20 +3261,22 @@ ips_done(ips_ha_t * ha, ips_scb_t * scb) /* Spin forward to last dma chunk */ sg_dma_index = scb->breakup; + for (i = 0; i < scb->breakup; i++) + sg = sg_next(sg); /* Take care of possible partial on last chunk */ ips_fill_scb_sg_single(ha, - sg_dma_address(&sg[sg_dma_index]), + sg_dma_address(sg), scb, ips_sg_index++, - sg_dma_len(&sg[sg_dma_index])); + sg_dma_len(sg)); for (; sg_dma_index < scsi_sg_count(scb->scsi_cmd); - sg_dma_index++) { + sg_dma_index++, sg = sg_next(sg)) { if (ips_fill_scb_sg_single (ha, - sg_dma_address(&sg[sg_dma_index]), + sg_dma_address(sg), scb, ips_sg_index++, - sg_dma_len(&sg[sg_dma_index])) < 0) + sg_dma_len(sg)) < 0) break; } diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c index cd674938ccd5..c0755565fae9 100644 --- a/drivers/scsi/lpfc/lpfc_scsi.c +++ b/drivers/scsi/lpfc/lpfc_scsi.c @@ -1438,6 +1438,7 @@ struct scsi_host_template lpfc_template = { .scan_finished = lpfc_scan_finished, .this_id = -1, .sg_tablesize = LPFC_SG_SEG_CNT, + .use_sg_chaining = ENABLE_SG_CHAINING, .cmd_per_lun = LPFC_CMD_PER_LUN, .use_clustering = ENABLE_CLUSTERING, .shost_attrs = lpfc_hba_attrs, @@ -1460,6 +1461,7 @@ struct scsi_host_template lpfc_vport_template = { .sg_tablesize = LPFC_SG_SEG_CNT, .cmd_per_lun = LPFC_CMD_PER_LUN, .use_clustering = ENABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, .shost_attrs = lpfc_vport_attrs, .max_sectors = 0xFFFF, }; diff --git a/drivers/scsi/mac53c94.c b/drivers/scsi/mac53c94.c index b12ad7c7c673..a035001f4438 100644 --- a/drivers/scsi/mac53c94.c +++ b/drivers/scsi/mac53c94.c @@ -402,6 +402,7 @@ static struct scsi_host_template mac53c94_template = { .sg_tablesize = SG_ALL, .cmd_per_lun = 1, .use_clustering = DISABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, }; static int mac53c94_probe(struct macio_dev *mdev, const struct of_device_id *match) diff --git a/drivers/scsi/megaraid.c b/drivers/scsi/megaraid.c index e7e11f282c8f..10d1aff9938a 100644 --- a/drivers/scsi/megaraid.c +++ b/drivers/scsi/megaraid.c @@ -4492,6 +4492,7 @@ static struct scsi_host_template megaraid_template = { .sg_tablesize = MAX_SGLIST, .cmd_per_lun = DEF_CMD_PER_LUN, .use_clustering = ENABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, .eh_abort_handler = megaraid_abort, .eh_device_reset_handler = megaraid_reset, .eh_bus_reset_handler = megaraid_reset, diff --git a/drivers/scsi/megaraid/megaraid_mbox.c b/drivers/scsi/megaraid/megaraid_mbox.c index c6a53dccc16a..e4e4c6a39ed6 100644 --- a/drivers/scsi/megaraid/megaraid_mbox.c +++ b/drivers/scsi/megaraid/megaraid_mbox.c @@ -361,6 +361,7 @@ static struct scsi_host_template megaraid_template_g = { .eh_host_reset_handler = megaraid_reset_handler, .change_queue_depth = megaraid_change_queue_depth, .use_clustering = ENABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, .sdev_attrs = megaraid_sdev_attrs, .shost_attrs = megaraid_shost_attrs, }; diff --git a/drivers/scsi/megaraid/megaraid_sas.c b/drivers/scsi/megaraid/megaraid_sas.c index ebb948c016bb..e3c5c5282203 100644 --- a/drivers/scsi/megaraid/megaraid_sas.c +++ b/drivers/scsi/megaraid/megaraid_sas.c @@ -1110,6 +1110,7 @@ static struct scsi_host_template megasas_template = { .eh_timed_out = megasas_reset_timer, .bios_param = megasas_bios_param, .use_clustering = ENABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, }; /** diff --git a/drivers/scsi/mesh.c b/drivers/scsi/mesh.c index 651d09b08f2a..7470ff39ab22 100644 --- a/drivers/scsi/mesh.c +++ b/drivers/scsi/mesh.c @@ -1843,6 +1843,7 @@ static struct scsi_host_template mesh_template = { .sg_tablesize = SG_ALL, .cmd_per_lun = 2, .use_clustering = DISABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, }; static int mesh_probe(struct macio_dev *mdev, const struct of_device_id *match) diff --git a/drivers/scsi/nsp32.c b/drivers/scsi/nsp32.c index 7fed35372150..28161dc95e0d 100644 --- a/drivers/scsi/nsp32.c +++ b/drivers/scsi/nsp32.c @@ -281,6 +281,7 @@ static struct scsi_host_template nsp32_template = { .cmd_per_lun = 1, .this_id = NSP32_HOST_SCSIID, .use_clustering = DISABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, .eh_abort_handler = nsp32_eh_abort, .eh_bus_reset_handler = nsp32_eh_bus_reset, .eh_host_reset_handler = nsp32_eh_host_reset, diff --git a/drivers/scsi/pcmcia/sym53c500_cs.c b/drivers/scsi/pcmcia/sym53c500_cs.c index 961839ecfe86..190e2a7d7067 100644 --- a/drivers/scsi/pcmcia/sym53c500_cs.c +++ b/drivers/scsi/pcmcia/sym53c500_cs.c @@ -694,6 +694,7 @@ static struct scsi_host_template sym53c500_driver_template = { .sg_tablesize = 32, .cmd_per_lun = 1, .use_clustering = ENABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, .shost_attrs = SYM53C500_shost_attrs }; diff --git a/drivers/scsi/qla1280.c b/drivers/scsi/qla1280.c index fba8aa8a81b5..76089cf55f4e 100644 --- a/drivers/scsi/qla1280.c +++ b/drivers/scsi/qla1280.c @@ -2775,7 +2775,7 @@ qla1280_64bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp) struct device_reg __iomem *reg = ha->iobase; struct scsi_cmnd *cmd = sp->cmd; cmd_a64_entry_t *pkt; - struct scatterlist *sg = NULL; + struct scatterlist *sg = NULL, *s; __le32 *dword_ptr; dma_addr_t dma_handle; int status = 0; @@ -2889,13 +2889,16 @@ qla1280_64bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp) * Load data segments. */ if (seg_cnt) { /* If data transfer. */ + int remseg = seg_cnt; /* Setup packet address segment pointer. */ dword_ptr = (u32 *)&pkt->dseg_0_address; if (cmd->use_sg) { /* If scatter gather */ /* Load command entry data segments. */ - for (cnt = 0; cnt < 2 && seg_cnt; cnt++, seg_cnt--) { - dma_handle = sg_dma_address(sg); + for_each_sg(sg, s, seg_cnt, cnt) { + if (cnt == 2) + break; + dma_handle = sg_dma_address(s); #if defined(CONFIG_IA64_GENERIC) || defined(CONFIG_IA64_SGI_SN2) if (ha->flags.use_pci_vchannel) sn_pci_set_vchan(ha->pdev, @@ -2906,12 +2909,12 @@ qla1280_64bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp) cpu_to_le32(pci_dma_lo32(dma_handle)); *dword_ptr++ = cpu_to_le32(pci_dma_hi32(dma_handle)); - *dword_ptr++ = cpu_to_le32(sg_dma_len(sg)); - sg++; + *dword_ptr++ = cpu_to_le32(sg_dma_len(s)); dprintk(3, "S/G Segment phys_addr=%x %x, len=0x%x\n", cpu_to_le32(pci_dma_hi32(dma_handle)), cpu_to_le32(pci_dma_lo32(dma_handle)), - cpu_to_le32(sg_dma_len(sg))); + cpu_to_le32(sg_dma_len(sg_next(s)))); + remseg--; } dprintk(5, "qla1280_64bit_start_scsi: Scatter/gather " "command packet data - b %i, t %i, l %i \n", @@ -2926,7 +2929,9 @@ qla1280_64bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp) dprintk(3, "S/G Building Continuation...seg_cnt=0x%x " "remains\n", seg_cnt); - while (seg_cnt > 0) { + while (remseg > 0) { + /* Update sg start */ + sg = s; /* Adjust ring index. */ ha->req_ring_index++; if (ha->req_ring_index == REQUEST_ENTRY_CNT) { @@ -2952,9 +2957,10 @@ qla1280_64bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp) (u32 *)&((struct cont_a64_entry *) pkt)->dseg_0_address; /* Load continuation entry data segments. */ - for (cnt = 0; cnt < 5 && seg_cnt; - cnt++, seg_cnt--) { - dma_handle = sg_dma_address(sg); + for_each_sg(sg, s, remseg, cnt) { + if (cnt == 5) + break; + dma_handle = sg_dma_address(s); #if defined(CONFIG_IA64_GENERIC) || defined(CONFIG_IA64_SGI_SN2) if (ha->flags.use_pci_vchannel) sn_pci_set_vchan(ha->pdev, @@ -2966,13 +2972,13 @@ qla1280_64bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp) *dword_ptr++ = cpu_to_le32(pci_dma_hi32(dma_handle)); *dword_ptr++ = - cpu_to_le32(sg_dma_len(sg)); + cpu_to_le32(sg_dma_len(s)); dprintk(3, "S/G Segment Cont. phys_addr=%x %x, len=0x%x\n", cpu_to_le32(pci_dma_hi32(dma_handle)), cpu_to_le32(pci_dma_lo32(dma_handle)), - cpu_to_le32(sg_dma_len(sg))); - sg++; + cpu_to_le32(sg_dma_len(s))); } + remseg -= cnt; dprintk(5, "qla1280_64bit_start_scsi: " "continuation packet data - b %i, t " "%i, l %i \n", SCSI_BUS_32(cmd), @@ -3062,7 +3068,7 @@ qla1280_32bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp) struct device_reg __iomem *reg = ha->iobase; struct scsi_cmnd *cmd = sp->cmd; struct cmd_entry *pkt; - struct scatterlist *sg = NULL; + struct scatterlist *sg = NULL, *s; __le32 *dword_ptr; int status = 0; int cnt; @@ -3188,6 +3194,7 @@ qla1280_32bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp) * Load data segments. */ if (seg_cnt) { + int remseg = seg_cnt; /* Setup packet address segment pointer. */ dword_ptr = &pkt->dseg_0_address; @@ -3196,22 +3203,25 @@ qla1280_32bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp) qla1280_dump_buffer(1, (char *)sg, 4 * 16); /* Load command entry data segments. */ - for (cnt = 0; cnt < 4 && seg_cnt; cnt++, seg_cnt--) { + for_each_sg(sg, s, seg_cnt, cnt) { + if (cnt == 4) + break; *dword_ptr++ = - cpu_to_le32(pci_dma_lo32(sg_dma_address(sg))); - *dword_ptr++ = - cpu_to_le32(sg_dma_len(sg)); + cpu_to_le32(pci_dma_lo32(sg_dma_address(s))); + *dword_ptr++ = cpu_to_le32(sg_dma_len(s)); dprintk(3, "S/G Segment phys_addr=0x%lx, len=0x%x\n", - (pci_dma_lo32(sg_dma_address(sg))), - (sg_dma_len(sg))); - sg++; + (pci_dma_lo32(sg_dma_address(s))), + (sg_dma_len(s))); + remseg--; } /* * Build continuation packets. */ dprintk(3, "S/G Building Continuation" "...seg_cnt=0x%x remains\n", seg_cnt); - while (seg_cnt > 0) { + while (remseg > 0) { + /* Continue from end point */ + sg = s; /* Adjust ring index. */ ha->req_ring_index++; if (ha->req_ring_index == REQUEST_ENTRY_CNT) { @@ -3239,19 +3249,20 @@ qla1280_32bit_start_scsi(struct scsi_qla_host *ha, struct srb * sp) &((struct cont_entry *) pkt)->dseg_0_address; /* Load continuation entry data segments. */ - for (cnt = 0; cnt < 7 && seg_cnt; - cnt++, seg_cnt--) { + for_each_sg(sg, s, remseg, cnt) { + if (cnt == 7) + break; *dword_ptr++ = - cpu_to_le32(pci_dma_lo32(sg_dma_address(sg))); + cpu_to_le32(pci_dma_lo32(sg_dma_address(s))); *dword_ptr++ = - cpu_to_le32(sg_dma_len(sg)); + cpu_to_le32(sg_dma_len(s)); dprintk(1, "S/G Segment Cont. phys_addr=0x%x, " "len=0x%x\n", - cpu_to_le32(pci_dma_lo32(sg_dma_address(sg))), - cpu_to_le32(sg_dma_len(sg))); - sg++; + cpu_to_le32(pci_dma_lo32(sg_dma_address(s))), + cpu_to_le32(sg_dma_len(s))); } + remseg -= cnt; dprintk(5, "qla1280_32bit_start_scsi: " "continuation packet data - " "scsi(%i:%i:%i)\n", SCSI_BUS_32(cmd), @@ -4248,6 +4259,7 @@ static struct scsi_host_template qla1280_driver_template = { .sg_tablesize = SG_ALL, .cmd_per_lun = 1, .use_clustering = ENABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, }; diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c index a6bb8d0ecf13..0351d380c2d7 100644 --- a/drivers/scsi/qla2xxx/qla_os.c +++ b/drivers/scsi/qla2xxx/qla_os.c @@ -132,6 +132,7 @@ struct scsi_host_template qla2x00_driver_template = { .this_id = -1, .cmd_per_lun = 3, .use_clustering = ENABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, .sg_tablesize = SG_ALL, /* @@ -163,6 +164,7 @@ struct scsi_host_template qla24xx_driver_template = { .this_id = -1, .cmd_per_lun = 3, .use_clustering = ENABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, .sg_tablesize = SG_ALL, .max_sectors = 0xFFFF, diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c index b1d565c12c5b..03b68d4f3bd0 100644 --- a/drivers/scsi/qla4xxx/ql4_os.c +++ b/drivers/scsi/qla4xxx/ql4_os.c @@ -94,6 +94,7 @@ static struct scsi_host_template qla4xxx_driver_template = { .this_id = -1, .cmd_per_lun = 3, .use_clustering = ENABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, .sg_tablesize = SG_ALL, .max_sectors = 0xFFFF, diff --git a/drivers/scsi/qlogicfas.c b/drivers/scsi/qlogicfas.c index 1e874f1fb5c6..1769f965eedf 100644 --- a/drivers/scsi/qlogicfas.c +++ b/drivers/scsi/qlogicfas.c @@ -197,6 +197,7 @@ static struct scsi_host_template qlogicfas_driver_template = { .sg_tablesize = SG_ALL, .cmd_per_lun = 1, .use_clustering = DISABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, }; static __init int qlogicfas_init(void) diff --git a/drivers/scsi/qlogicpti.c b/drivers/scsi/qlogicpti.c index e93f80316a19..7a2e7986b038 100644 --- a/drivers/scsi/qlogicpti.c +++ b/drivers/scsi/qlogicpti.c @@ -868,7 +868,7 @@ static inline int load_cmd(struct scsi_cmnd *Cmnd, struct Command_Entry *cmd, struct qlogicpti *qpti, u_int in_ptr, u_int out_ptr) { struct dataseg *ds; - struct scatterlist *sg; + struct scatterlist *sg, *s; int i, n; if (Cmnd->use_sg) { @@ -884,11 +884,12 @@ static inline int load_cmd(struct scsi_cmnd *Cmnd, struct Command_Entry *cmd, n = sg_count; if (n > 4) n = 4; - for (i = 0; i < n; i++, sg++) { - ds[i].d_base = sg_dma_address(sg); - ds[i].d_count = sg_dma_len(sg); + for_each_sg(sg, s, n, i) { + ds[i].d_base = sg_dma_address(s); + ds[i].d_count = sg_dma_len(s); } sg_count -= 4; + sg = s; while (sg_count > 0) { struct Continuation_Entry *cont; @@ -907,9 +908,9 @@ static inline int load_cmd(struct scsi_cmnd *Cmnd, struct Command_Entry *cmd, n = sg_count; if (n > 7) n = 7; - for (i = 0; i < n; i++, sg++) { - ds[i].d_base = sg_dma_address(sg); - ds[i].d_count = sg_dma_len(sg); + for_each_sg(sg, s, n, i) { + ds[i].d_base = sg_dma_address(s); + ds[i].d_count = sg_dma_len(s); } sg_count -= n; } diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index 4947dfe625a6..72ee4c9cfb1a 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -38,6 +38,7 @@ #include <linux/proc_fs.h> #include <linux/vmalloc.h> #include <linux/moduleparam.h> +#include <linux/scatterlist.h> #include <linux/blkdev.h> #include "scsi.h" @@ -600,7 +601,7 @@ static int fill_from_dev_buffer(struct scsi_cmnd * scp, unsigned char * arr, int k, req_len, act_len, len, active; void * kaddr; void * kaddr_off; - struct scatterlist * sgpnt; + struct scatterlist * sg; if (0 == scp->request_bufflen) return 0; @@ -619,16 +620,16 @@ static int fill_from_dev_buffer(struct scsi_cmnd * scp, unsigned char * arr, scp->resid = req_len - act_len; return 0; } - sgpnt = (struct scatterlist *)scp->request_buffer; active = 1; - for (k = 0, req_len = 0, act_len = 0; k < scp->use_sg; ++k, ++sgpnt) { + req_len = act_len = 0; + scsi_for_each_sg(scp, sg, scp->use_sg, k) { if (active) { kaddr = (unsigned char *) - kmap_atomic(sgpnt->page, KM_USER0); + kmap_atomic(sg->page, KM_USER0); if (NULL == kaddr) return (DID_ERROR << 16); - kaddr_off = (unsigned char *)kaddr + sgpnt->offset; - len = sgpnt->length; + kaddr_off = (unsigned char *)kaddr + sg->offset; + len = sg->length; if ((req_len + len) > arr_len) { active = 0; len = arr_len - req_len; @@ -637,7 +638,7 @@ static int fill_from_dev_buffer(struct scsi_cmnd * scp, unsigned char * arr, kunmap_atomic(kaddr, KM_USER0); act_len += len; } - req_len += sgpnt->length; + req_len += sg->length; } if (scp->resid) scp->resid -= act_len; @@ -653,7 +654,7 @@ static int fetch_to_dev_buffer(struct scsi_cmnd * scp, unsigned char * arr, int k, req_len, len, fin; void * kaddr; void * kaddr_off; - struct scatterlist * sgpnt; + struct scatterlist * sg; if (0 == scp->request_bufflen) return 0; @@ -668,13 +669,14 @@ static int fetch_to_dev_buffer(struct scsi_cmnd * scp, unsigned char * arr, memcpy(arr, scp->request_buffer, len); return len; } - sgpnt = (struct scatterlist *)scp->request_buffer; - for (k = 0, req_len = 0, fin = 0; k < scp->use_sg; ++k, ++sgpnt) { - kaddr = (unsigned char *)kmap_atomic(sgpnt->page, KM_USER0); + sg = scsi_sglist(scp); + req_len = fin = 0; + for (k = 0; k < scp->use_sg; ++k, sg = sg_next(sg)) { + kaddr = (unsigned char *)kmap_atomic(sg->page, KM_USER0); if (NULL == kaddr) return -1; - kaddr_off = (unsigned char *)kaddr + sgpnt->offset; - len = sgpnt->length; + kaddr_off = (unsigned char *)kaddr + sg->offset; + len = sg->length; if ((req_len + len) > max_arr_len) { len = max_arr_len - req_len; fin = 1; @@ -683,7 +685,7 @@ static int fetch_to_dev_buffer(struct scsi_cmnd * scp, unsigned char * arr, kunmap_atomic(kaddr, KM_USER0); if (fin) return req_len + len; - req_len += sgpnt->length; + req_len += sg->length; } return req_len; } diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 207f1aa08869..aac8a02cbe80 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -17,6 +17,7 @@ #include <linux/pci.h> #include <linux/delay.h> #include <linux/hardirq.h> +#include <linux/scatterlist.h> #include <scsi/scsi.h> #include <scsi/scsi_cmnd.h> @@ -33,35 +34,34 @@ #define SG_MEMPOOL_NR ARRAY_SIZE(scsi_sg_pools) #define SG_MEMPOOL_SIZE 2 +/* + * The maximum number of SG segments that we will put inside a scatterlist + * (unless chaining is used). Should ideally fit inside a single page, to + * avoid a higher order allocation. + */ +#define SCSI_MAX_SG_SEGMENTS 128 + struct scsi_host_sg_pool { size_t size; - char *name; + char *name; struct kmem_cache *slab; mempool_t *pool; }; -#if (SCSI_MAX_PHYS_SEGMENTS < 32) -#error SCSI_MAX_PHYS_SEGMENTS is too small -#endif - -#define SP(x) { x, "sgpool-" #x } +#define SP(x) { x, "sgpool-" #x } static struct scsi_host_sg_pool scsi_sg_pools[] = { SP(8), SP(16), +#if (SCSI_MAX_SG_SEGMENTS > 16) SP(32), -#if (SCSI_MAX_PHYS_SEGMENTS > 32) +#if (SCSI_MAX_SG_SEGMENTS > 32) SP(64), -#if (SCSI_MAX_PHYS_SEGMENTS > 64) +#if (SCSI_MAX_SG_SEGMENTS > 64) SP(128), -#if (SCSI_MAX_PHYS_SEGMENTS > 128) - SP(256), -#if (SCSI_MAX_PHYS_SEGMENTS > 256) -#error SCSI_MAX_PHYS_SEGMENTS is too large -#endif #endif #endif #endif -}; +}; #undef SP static void scsi_run_queue(struct request_queue *q); @@ -289,14 +289,16 @@ static int scsi_req_map_sg(struct request *rq, struct scatterlist *sgl, struct request_queue *q = rq->q; int nr_pages = (bufflen + sgl[0].offset + PAGE_SIZE - 1) >> PAGE_SHIFT; unsigned int data_len = bufflen, len, bytes, off; + struct scatterlist *sg; struct page *page; struct bio *bio = NULL; int i, err, nr_vecs = 0; - for (i = 0; i < nsegs; i++) { - page = sgl[i].page; - off = sgl[i].offset; - len = sgl[i].length; + for_each_sg(sgl, sg, nsegs, i) { + page = sg->page; + off = sg->offset; + len = sg->length; + data_len += len; while (len > 0 && data_len > 0) { /* @@ -695,56 +697,170 @@ static struct scsi_cmnd *scsi_end_request(struct scsi_cmnd *cmd, int uptodate, return NULL; } -struct scatterlist *scsi_alloc_sgtable(struct scsi_cmnd *cmd, gfp_t gfp_mask) -{ - struct scsi_host_sg_pool *sgp; - struct scatterlist *sgl; +/* + * Like SCSI_MAX_SG_SEGMENTS, but for archs that have sg chaining. This limit + * is totally arbitrary, a setting of 2048 will get you at least 8mb ios. + */ +#define SCSI_MAX_SG_CHAIN_SEGMENTS 2048 - BUG_ON(!cmd->use_sg); +static inline unsigned int scsi_sgtable_index(unsigned short nents) +{ + unsigned int index; - switch (cmd->use_sg) { + switch (nents) { case 1 ... 8: - cmd->sglist_len = 0; + index = 0; break; case 9 ... 16: - cmd->sglist_len = 1; + index = 1; break; +#if (SCSI_MAX_SG_SEGMENTS > 16) case 17 ... 32: - cmd->sglist_len = 2; + index = 2; break; -#if (SCSI_MAX_PHYS_SEGMENTS > 32) +#if (SCSI_MAX_SG_SEGMENTS > 32) case 33 ... 64: - cmd->sglist_len = 3; + index = 3; break; -#if (SCSI_MAX_PHYS_SEGMENTS > 64) +#if (SCSI_MAX_SG_SEGMENTS > 64) case 65 ... 128: - cmd->sglist_len = 4; - break; -#if (SCSI_MAX_PHYS_SEGMENTS > 128) - case 129 ... 256: - cmd->sglist_len = 5; + index = 4; break; #endif #endif #endif default: - return NULL; + printk(KERN_ERR "scsi: bad segment count=%d\n", nents); + BUG(); } - sgp = scsi_sg_pools + cmd->sglist_len; - sgl = mempool_alloc(sgp->pool, gfp_mask); - return sgl; + return index; +} + +struct scatterlist *scsi_alloc_sgtable(struct scsi_cmnd *cmd, gfp_t gfp_mask) +{ + struct scsi_host_sg_pool *sgp; + struct scatterlist *sgl, *prev, *ret; + unsigned int index; + int this, left; + + BUG_ON(!cmd->use_sg); + + left = cmd->use_sg; + ret = prev = NULL; + do { + this = left; + if (this > SCSI_MAX_SG_SEGMENTS) { + this = SCSI_MAX_SG_SEGMENTS - 1; + index = SG_MEMPOOL_NR - 1; + } else + index = scsi_sgtable_index(this); + + left -= this; + + sgp = scsi_sg_pools + index; + + sgl = mempool_alloc(sgp->pool, gfp_mask); + if (unlikely(!sgl)) + goto enomem; + + memset(sgl, 0, sizeof(*sgl) * sgp->size); + + /* + * first loop through, set initial index and return value + */ + if (!ret) + ret = sgl; + + /* + * chain previous sglist, if any. we know the previous + * sglist must be the biggest one, or we would not have + * ended up doing another loop. + */ + if (prev) + sg_chain(prev, SCSI_MAX_SG_SEGMENTS, sgl); + + /* + * don't allow subsequent mempool allocs to sleep, it would + * violate the mempool principle. + */ + gfp_mask &= ~__GFP_WAIT; + gfp_mask |= __GFP_HIGH; + prev = sgl; + } while (left); + + /* + * ->use_sg may get modified after dma mapping has potentially + * shrunk the number of segments, so keep a copy of it for free. + */ + cmd->__use_sg = cmd->use_sg; + return ret; +enomem: + if (ret) { + /* + * Free entries chained off ret. Since we were trying to + * allocate another sglist, we know that all entries are of + * the max size. + */ + sgp = scsi_sg_pools + SG_MEMPOOL_NR - 1; + prev = ret; + ret = &ret[SCSI_MAX_SG_SEGMENTS - 1]; + + while ((sgl = sg_chain_ptr(ret)) != NULL) { + ret = &sgl[SCSI_MAX_SG_SEGMENTS - 1]; + mempool_free(sgl, sgp->pool); + } + + mempool_free(prev, sgp->pool); + } + return NULL; } EXPORT_SYMBOL(scsi_alloc_sgtable); -void scsi_free_sgtable(struct scatterlist *sgl, int index) +void scsi_free_sgtable(struct scsi_cmnd *cmd) { + struct scatterlist *sgl = cmd->request_buffer; struct scsi_host_sg_pool *sgp; - BUG_ON(index >= SG_MEMPOOL_NR); + /* + * if this is the biggest size sglist, check if we have + * chained parts we need to free + */ + if (cmd->__use_sg > SCSI_MAX_SG_SEGMENTS) { + unsigned short this, left; + struct scatterlist *next; + unsigned int index; + + left = cmd->__use_sg - (SCSI_MAX_SG_SEGMENTS - 1); + next = sg_chain_ptr(&sgl[SCSI_MAX_SG_SEGMENTS - 1]); + while (left && next) { + sgl = next; + this = left; + if (this > SCSI_MAX_SG_SEGMENTS) { + this = SCSI_MAX_SG_SEGMENTS - 1; + index = SG_MEMPOOL_NR - 1; + } else + index = scsi_sgtable_index(this); + + left -= this; + + sgp = scsi_sg_pools + index; + + if (left) + next = sg_chain_ptr(&sgl[sgp->size - 1]); + + mempool_free(sgl, sgp->pool); + } + + /* + * Restore original, will be freed below + */ + sgl = cmd->request_buffer; + sgp = scsi_sg_pools + SG_MEMPOOL_NR - 1; + } else + sgp = scsi_sg_pools + scsi_sgtable_index(cmd->__use_sg); - sgp = scsi_sg_pools + index; mempool_free(sgl, sgp->pool); } @@ -770,7 +886,7 @@ EXPORT_SYMBOL(scsi_free_sgtable); static void scsi_release_buffers(struct scsi_cmnd *cmd) { if (cmd->use_sg) - scsi_free_sgtable(cmd->request_buffer, cmd->sglist_len); + scsi_free_sgtable(cmd); /* * Zero these out. They now point to freed memory, and it is @@ -984,7 +1100,6 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes) static int scsi_init_io(struct scsi_cmnd *cmd) { struct request *req = cmd->request; - struct scatterlist *sgpnt; int count; /* @@ -997,14 +1112,13 @@ static int scsi_init_io(struct scsi_cmnd *cmd) /* * If sg table allocation fails, requeue request later. */ - sgpnt = scsi_alloc_sgtable(cmd, GFP_ATOMIC); - if (unlikely(!sgpnt)) { + cmd->request_buffer = scsi_alloc_sgtable(cmd, GFP_ATOMIC); + if (unlikely(!cmd->request_buffer)) { scsi_unprep_request(req); return BLKPREP_DEFER; } req->buffer = NULL; - cmd->request_buffer = (char *) sgpnt; if (blk_pc_request(req)) cmd->request_bufflen = req->data_len; else @@ -1529,8 +1643,25 @@ struct request_queue *__scsi_alloc_queue(struct Scsi_Host *shost, if (!q) return NULL; + /* + * this limit is imposed by hardware restrictions + */ blk_queue_max_hw_segments(q, shost->sg_tablesize); - blk_queue_max_phys_segments(q, SCSI_MAX_PHYS_SEGMENTS); + + /* + * In the future, sg chaining support will be mandatory and this + * ifdef can then go away. Right now we don't have all archs + * converted, so better keep it safe. + */ +#ifdef ARCH_HAS_SG_CHAIN + if (shost->use_sg_chaining) + blk_queue_max_phys_segments(q, SCSI_MAX_SG_CHAIN_SEGMENTS); + else + blk_queue_max_phys_segments(q, SCSI_MAX_SG_SEGMENTS); +#else + blk_queue_max_phys_segments(q, SCSI_MAX_SG_SEGMENTS); +#endif + blk_queue_max_sectors(q, shost->max_sectors); blk_queue_bounce_limit(q, scsi_calculate_bounce_limit(shost)); blk_queue_segment_boundary(q, shost->dma_boundary); @@ -2193,18 +2324,19 @@ EXPORT_SYMBOL_GPL(scsi_target_unblock); * * Returns virtual address of the start of the mapped page */ -void *scsi_kmap_atomic_sg(struct scatterlist *sg, int sg_count, +void *scsi_kmap_atomic_sg(struct scatterlist *sgl, int sg_count, size_t *offset, size_t *len) { int i; size_t sg_len = 0, len_complete = 0; + struct scatterlist *sg; struct page *page; WARN_ON(!irqs_disabled()); - for (i = 0; i < sg_count; i++) { + for_each_sg(sgl, sg, sg_count, i) { len_complete = sg_len; /* Complete sg-entries */ - sg_len += sg[i].length; + sg_len += sg->length; if (sg_len > *offset) break; } @@ -2218,10 +2350,10 @@ void *scsi_kmap_atomic_sg(struct scatterlist *sg, int sg_count, } /* Offset starting from the beginning of first page in this sg-entry */ - *offset = *offset - len_complete + sg[i].offset; + *offset = *offset - len_complete + sg->offset; /* Assumption: contiguous pages can be accessed as "page + i" */ - page = nth_page(sg[i].page, (*offset >> PAGE_SHIFT)); + page = nth_page(sg->page, (*offset >> PAGE_SHIFT)); *offset &= ~PAGE_MASK; /* Bytes in this sg-entry from *offset to the end of the page */ diff --git a/drivers/scsi/scsi_tgt_lib.c b/drivers/scsi/scsi_tgt_lib.c index 66c692ffa305..a91761c3645f 100644 --- a/drivers/scsi/scsi_tgt_lib.c +++ b/drivers/scsi/scsi_tgt_lib.c @@ -332,7 +332,7 @@ static void scsi_tgt_cmd_done(struct scsi_cmnd *cmd) scsi_tgt_uspace_send_status(cmd, tcmd->itn_id, tcmd->tag); if (cmd->request_buffer) - scsi_free_sgtable(cmd->request_buffer, cmd->sglist_len); + scsi_free_sgtable(cmd); queue_work(scsi_tgtd, &tcmd->work); } @@ -373,7 +373,7 @@ static int scsi_tgt_init_cmd(struct scsi_cmnd *cmd, gfp_t gfp_mask) } eprintk("cmd %p cnt %d\n", cmd, cmd->use_sg); - scsi_free_sgtable(cmd->request_buffer, cmd->sglist_len); + scsi_free_sgtable(cmd); return -EINVAL; } diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 0a3a528212c2..69f542c4923c 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -826,27 +826,6 @@ static int sd_sync_cache(struct scsi_disk *sdkp) return 0; } -static int sd_issue_flush(struct request_queue *q, struct gendisk *disk, - sector_t *error_sector) -{ - int ret = 0; - struct scsi_device *sdp = q->queuedata; - struct scsi_disk *sdkp; - - if (sdp->sdev_state != SDEV_RUNNING) - return -ENXIO; - - sdkp = scsi_disk_get_from_dev(&sdp->sdev_gendev); - - if (!sdkp) - return -ENODEV; - - if (sdkp->WCE) - ret = sd_sync_cache(sdkp); - scsi_disk_put(sdkp); - return ret; -} - static void sd_prepare_flush(struct request_queue *q, struct request *rq) { memset(rq->cmd, 0, sizeof(rq->cmd)); @@ -1697,7 +1676,6 @@ static int sd_probe(struct device *dev) sd_revalidate_disk(gd); blk_queue_prep_rq(sdp->request_queue, sd_prep_fn); - blk_queue_issue_flush_fn(sdp->request_queue, sd_issue_flush); gd->driverfs_dev = &sdp->sdev_gendev; gd->flags = GENHD_FL_DRIVERFS; diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c index f6f5fc7d0cee..7238b2dfc497 100644 --- a/drivers/scsi/sg.c +++ b/drivers/scsi/sg.c @@ -1165,7 +1165,7 @@ sg_vma_nopage(struct vm_area_struct *vma, unsigned long addr, int *type) sg = rsv_schp->buffer; sa = vma->vm_start; for (k = 0; (k < rsv_schp->k_use_sg) && (sa < vma->vm_end); - ++k, ++sg) { + ++k, sg = sg_next(sg)) { len = vma->vm_end - sa; len = (len < sg->length) ? len : sg->length; if (offset < len) { @@ -1209,7 +1209,7 @@ sg_mmap(struct file *filp, struct vm_area_struct *vma) sa = vma->vm_start; sg = rsv_schp->buffer; for (k = 0; (k < rsv_schp->k_use_sg) && (sa < vma->vm_end); - ++k, ++sg) { + ++k, sg = sg_next(sg)) { len = vma->vm_end - sa; len = (len < sg->length) ? len : sg->length; sa += len; @@ -1840,7 +1840,7 @@ sg_build_indirect(Sg_scatter_hold * schp, Sg_fd * sfp, int buff_size) } for (k = 0, sg = schp->buffer, rem_sz = blk_size; (rem_sz > 0) && (k < mx_sc_elems); - ++k, rem_sz -= ret_sz, ++sg) { + ++k, rem_sz -= ret_sz, sg = sg_next(sg)) { num = (rem_sz > scatter_elem_sz_prev) ? scatter_elem_sz_prev : rem_sz; @@ -1913,7 +1913,7 @@ sg_write_xfer(Sg_request * srp) if (res) return res; - for (; p; ++sg, ksglen = sg->length, + for (; p; sg = sg_next(sg), ksglen = sg->length, p = page_address(sg->page)) { if (usglen <= 0) break; @@ -1992,7 +1992,7 @@ sg_remove_scat(Sg_scatter_hold * schp) int k; for (k = 0; (k < schp->k_use_sg) && sg->page; - ++k, ++sg) { + ++k, sg = sg_next(sg)) { SCSI_LOG_TIMEOUT(5, printk( "sg_remove_scat: k=%d, pg=0x%p, len=%d\n", k, sg->page, sg->length)); @@ -2045,7 +2045,7 @@ sg_read_xfer(Sg_request * srp) if (res) return res; - for (; p; ++sg, ksglen = sg->length, + for (; p; sg = sg_next(sg), ksglen = sg->length, p = page_address(sg->page)) { if (usglen <= 0) break; @@ -2092,7 +2092,7 @@ sg_read_oxfer(Sg_request * srp, char __user *outp, int num_read_xfer) if ((!outp) || (num_read_xfer <= 0)) return 0; - for (k = 0; (k < schp->k_use_sg) && sg->page; ++k, ++sg) { + for (k = 0; (k < schp->k_use_sg) && sg->page; ++k, sg = sg_next(sg)) { num = sg->length; if (num > num_read_xfer) { if (__copy_to_user(outp, page_address(sg->page), @@ -2142,7 +2142,7 @@ sg_link_reserve(Sg_fd * sfp, Sg_request * srp, int size) SCSI_LOG_TIMEOUT(4, printk("sg_link_reserve: size=%d\n", size)); rem = size; - for (k = 0; k < rsv_schp->k_use_sg; ++k, ++sg) { + for (k = 0; k < rsv_schp->k_use_sg; ++k, sg = sg_next(sg)) { num = sg->length; if (rem <= num) { sfp->save_scat_len = num; diff --git a/drivers/scsi/stex.c b/drivers/scsi/stex.c index 72f6d8015358..e3fab3a6aed7 100644 --- a/drivers/scsi/stex.c +++ b/drivers/scsi/stex.c @@ -1123,6 +1123,7 @@ static struct scsi_host_template driver_template = { .this_id = -1, .sg_tablesize = ST_MAX_SG, .cmd_per_lun = ST_CMD_PER_LUN, + .use_sg_chaining = ENABLE_SG_CHAINING, }; static int stex_set_dma_mask(struct pci_dev * pdev) diff --git a/drivers/scsi/sym53c416.c b/drivers/scsi/sym53c416.c index 92bfaeafe30d..8befab7e9839 100644 --- a/drivers/scsi/sym53c416.c +++ b/drivers/scsi/sym53c416.c @@ -854,5 +854,6 @@ static struct scsi_host_template driver_template = { .cmd_per_lun = 1, .unchecked_isa_dma = 1, .use_clustering = ENABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, }; #include "scsi_module.c" diff --git a/drivers/scsi/sym53c8xx_2/sym_glue.c b/drivers/scsi/sym53c8xx_2/sym_glue.c index 3db22325ea2c..db03c4c8ec1e 100644 --- a/drivers/scsi/sym53c8xx_2/sym_glue.c +++ b/drivers/scsi/sym53c8xx_2/sym_glue.c @@ -1808,6 +1808,7 @@ static struct scsi_host_template sym2_template = { .eh_host_reset_handler = sym53c8xx_eh_host_reset_handler, .this_id = 7, .use_clustering = ENABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, .max_sectors = 0xFFFF, #ifdef SYM_LINUX_PROC_INFO_SUPPORT .proc_info = sym53c8xx_proc_info, diff --git a/drivers/scsi/u14-34f.c b/drivers/scsi/u14-34f.c index fc9f51818e8f..7edd6ceb13b2 100644 --- a/drivers/scsi/u14-34f.c +++ b/drivers/scsi/u14-34f.c @@ -450,7 +450,8 @@ static struct scsi_host_template driver_template = { .slave_configure = u14_34f_slave_configure, .this_id = 7, .unchecked_isa_dma = 1, - .use_clustering = ENABLE_CLUSTERING + .use_clustering = ENABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, }; #if !defined(__BIG_ENDIAN_BITFIELD) && !defined(__LITTLE_ENDIAN_BITFIELD) diff --git a/drivers/scsi/ultrastor.c b/drivers/scsi/ultrastor.c index c08235d5afc9..ea72bbeb8f9d 100644 --- a/drivers/scsi/ultrastor.c +++ b/drivers/scsi/ultrastor.c @@ -1197,5 +1197,6 @@ static struct scsi_host_template driver_template = { .cmd_per_lun = ULTRASTOR_MAX_CMDS_PER_LUN, .unchecked_isa_dma = 1, .use_clustering = ENABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, }; #include "scsi_module.c" diff --git a/drivers/scsi/wd7000.c b/drivers/scsi/wd7000.c index d6fd4259c56b..255c611e78b8 100644 --- a/drivers/scsi/wd7000.c +++ b/drivers/scsi/wd7000.c @@ -1671,6 +1671,7 @@ static struct scsi_host_template driver_template = { .cmd_per_lun = 1, .unchecked_isa_dma = 1, .use_clustering = ENABLE_CLUSTERING, + .use_sg_chaining = ENABLE_SG_CHAINING, }; #include "scsi_module.c" diff --git a/drivers/usb/storage/alauda.c b/drivers/usb/storage/alauda.c index 4d3cbb12b713..8d3711a7ff06 100644 --- a/drivers/usb/storage/alauda.c +++ b/drivers/usb/storage/alauda.c @@ -798,12 +798,13 @@ static int alauda_read_data(struct us_data *us, unsigned long address, { unsigned char *buffer; u16 lba, max_lba; - unsigned int page, len, index, offset; + unsigned int page, len, offset; unsigned int blockshift = MEDIA_INFO(us).blockshift; unsigned int pageshift = MEDIA_INFO(us).pageshift; unsigned int blocksize = MEDIA_INFO(us).blocksize; unsigned int pagesize = MEDIA_INFO(us).pagesize; unsigned int uzonesize = MEDIA_INFO(us).uzonesize; + struct scatterlist *sg; int result; /* @@ -827,7 +828,8 @@ static int alauda_read_data(struct us_data *us, unsigned long address, max_lba = MEDIA_INFO(us).capacity >> (blockshift + pageshift); result = USB_STOR_TRANSPORT_GOOD; - index = offset = 0; + offset = 0; + sg = NULL; while (sectors > 0) { unsigned int zone = lba / uzonesize; /* integer division */ @@ -873,7 +875,7 @@ static int alauda_read_data(struct us_data *us, unsigned long address, /* Store the data in the transfer buffer */ usb_stor_access_xfer_buf(buffer, len, us->srb, - &index, &offset, TO_XFER_BUF); + &sg, &offset, TO_XFER_BUF); page = 0; lba++; @@ -891,11 +893,12 @@ static int alauda_write_data(struct us_data *us, unsigned long address, unsigned int sectors) { unsigned char *buffer, *blockbuffer; - unsigned int page, len, index, offset; + unsigned int page, len, offset; unsigned int blockshift = MEDIA_INFO(us).blockshift; unsigned int pageshift = MEDIA_INFO(us).pageshift; unsigned int blocksize = MEDIA_INFO(us).blocksize; unsigned int pagesize = MEDIA_INFO(us).pagesize; + struct scatterlist *sg; u16 lba, max_lba; int result; @@ -929,7 +932,8 @@ static int alauda_write_data(struct us_data *us, unsigned long address, max_lba = MEDIA_INFO(us).capacity >> (pageshift + blockshift); result = USB_STOR_TRANSPORT_GOOD; - index = offset = 0; + offset = 0; + sg = NULL; while (sectors > 0) { /* Write as many sectors as possible in this block */ @@ -946,7 +950,7 @@ static int alauda_write_data(struct us_data *us, unsigned long address, /* Get the data from the transfer buffer */ usb_stor_access_xfer_buf(buffer, len, us->srb, - &index, &offset, FROM_XFER_BUF); + &sg, &offset, FROM_XFER_BUF); result = alauda_write_lba(us, lba, page, pages, buffer, blockbuffer); diff --git a/drivers/usb/storage/datafab.c b/drivers/usb/storage/datafab.c index c87ad1bae1d6..579e9f52053a 100644 --- a/drivers/usb/storage/datafab.c +++ b/drivers/usb/storage/datafab.c @@ -98,7 +98,8 @@ static int datafab_read_data(struct us_data *us, unsigned char thistime; unsigned int totallen, alloclen; int len, result; - unsigned int sg_idx = 0, sg_offset = 0; + unsigned int sg_offset = 0; + struct scatterlist *sg = NULL; // we're working in LBA mode. according to the ATA spec, // we can support up to 28-bit addressing. I don't know if Datafab @@ -155,7 +156,7 @@ static int datafab_read_data(struct us_data *us, // Store the data in the transfer buffer usb_stor_access_xfer_buf(buffer, len, us->srb, - &sg_idx, &sg_offset, TO_XFER_BUF); + &sg, &sg_offset, TO_XFER_BUF); sector += thistime; totallen -= len; @@ -181,7 +182,8 @@ static int datafab_write_data(struct us_data *us, unsigned char thistime; unsigned int totallen, alloclen; int len, result; - unsigned int sg_idx = 0, sg_offset = 0; + unsigned int sg_offset = 0; + struct scatterlist *sg = NULL; // we're working in LBA mode. according to the ATA spec, // we can support up to 28-bit addressing. I don't know if Datafab @@ -217,7 +219,7 @@ static int datafab_write_data(struct us_data *us, // Get the data from the transfer buffer usb_stor_access_xfer_buf(buffer, len, us->srb, - &sg_idx, &sg_offset, FROM_XFER_BUF); + &sg, &sg_offset, FROM_XFER_BUF); command[0] = 0; command[1] = thistime; diff --git a/drivers/usb/storage/jumpshot.c b/drivers/usb/storage/jumpshot.c index 003fcf545888..61097cbb1585 100644 --- a/drivers/usb/storage/jumpshot.c +++ b/drivers/usb/storage/jumpshot.c @@ -119,7 +119,8 @@ static int jumpshot_read_data(struct us_data *us, unsigned char thistime; unsigned int totallen, alloclen; int len, result; - unsigned int sg_idx = 0, sg_offset = 0; + unsigned int sg_offset = 0; + struct scatterlist *sg = NULL; // we're working in LBA mode. according to the ATA spec, // we can support up to 28-bit addressing. I don't know if Jumpshot @@ -170,7 +171,7 @@ static int jumpshot_read_data(struct us_data *us, // Store the data in the transfer buffer usb_stor_access_xfer_buf(buffer, len, us->srb, - &sg_idx, &sg_offset, TO_XFER_BUF); + &sg, &sg_offset, TO_XFER_BUF); sector += thistime; totallen -= len; @@ -195,7 +196,8 @@ static int jumpshot_write_data(struct us_data *us, unsigned char thistime; unsigned int totallen, alloclen; int len, result, waitcount; - unsigned int sg_idx = 0, sg_offset = 0; + unsigned int sg_offset = 0; + struct scatterlist *sg = NULL; // we're working in LBA mode. according to the ATA spec, // we can support up to 28-bit addressing. I don't know if Jumpshot @@ -225,7 +227,7 @@ static int jumpshot_write_data(struct us_data *us, // Get the data from the transfer buffer usb_stor_access_xfer_buf(buffer, len, us->srb, - &sg_idx, &sg_offset, FROM_XFER_BUF); + &sg, &sg_offset, FROM_XFER_BUF); command[0] = 0; command[1] = thistime; diff --git a/drivers/usb/storage/protocol.c b/drivers/usb/storage/protocol.c index 9ad30428d2dd..cc8f7c52c729 100644 --- a/drivers/usb/storage/protocol.c +++ b/drivers/usb/storage/protocol.c @@ -157,7 +157,7 @@ void usb_stor_transparent_scsi_command(struct scsi_cmnd *srb, * pick up from where this one left off. */ unsigned int usb_stor_access_xfer_buf(unsigned char *buffer, - unsigned int buflen, struct scsi_cmnd *srb, unsigned int *index, + unsigned int buflen, struct scsi_cmnd *srb, struct scatterlist **sgptr, unsigned int *offset, enum xfer_buf_dir dir) { unsigned int cnt; @@ -184,16 +184,17 @@ unsigned int usb_stor_access_xfer_buf(unsigned char *buffer, * located in high memory -- then kmap() will map it to a temporary * position in the kernel's virtual address space. */ } else { - struct scatterlist *sg = - (struct scatterlist *) srb->request_buffer - + *index; + struct scatterlist *sg = *sgptr; + + if (!sg) + sg = (struct scatterlist *) srb->request_buffer; /* This loop handles a single s-g list entry, which may * include multiple pages. Find the initial page structure * and the starting offset within the page, and update * the *offset and *index values for the next loop. */ cnt = 0; - while (cnt < buflen && *index < srb->use_sg) { + while (cnt < buflen) { struct page *page = sg->page + ((sg->offset + *offset) >> PAGE_SHIFT); unsigned int poff = @@ -209,8 +210,7 @@ unsigned int usb_stor_access_xfer_buf(unsigned char *buffer, /* Transfer continues to next s-g entry */ *offset = 0; - ++*index; - ++sg; + sg = sg_next(sg); } /* Transfer the data for all the pages in this @@ -234,6 +234,7 @@ unsigned int usb_stor_access_xfer_buf(unsigned char *buffer, sglen -= plen; } } + *sgptr = sg; } /* Return the amount actually transferred */ @@ -245,9 +246,10 @@ unsigned int usb_stor_access_xfer_buf(unsigned char *buffer, void usb_stor_set_xfer_buf(unsigned char *buffer, unsigned int buflen, struct scsi_cmnd *srb) { - unsigned int index = 0, offset = 0; + unsigned int offset = 0; + struct scatterlist *sg = NULL; - usb_stor_access_xfer_buf(buffer, buflen, srb, &index, &offset, + usb_stor_access_xfer_buf(buffer, buflen, srb, &sg, &offset, TO_XFER_BUF); if (buflen < srb->request_bufflen) srb->resid = srb->request_bufflen - buflen; diff --git a/drivers/usb/storage/protocol.h b/drivers/usb/storage/protocol.h index 845bed4b8031..8737a36891ca 100644 --- a/drivers/usb/storage/protocol.h +++ b/drivers/usb/storage/protocol.h @@ -52,7 +52,7 @@ extern void usb_stor_transparent_scsi_command(struct scsi_cmnd*, enum xfer_buf_dir {TO_XFER_BUF, FROM_XFER_BUF}; extern unsigned int usb_stor_access_xfer_buf(unsigned char *buffer, - unsigned int buflen, struct scsi_cmnd *srb, unsigned int *index, + unsigned int buflen, struct scsi_cmnd *srb, struct scatterlist **, unsigned int *offset, enum xfer_buf_dir dir); extern void usb_stor_set_xfer_buf(unsigned char *buffer, diff --git a/drivers/usb/storage/sddr09.c b/drivers/usb/storage/sddr09.c index b2ed2a3e6fca..b12202c5da2d 100644 --- a/drivers/usb/storage/sddr09.c +++ b/drivers/usb/storage/sddr09.c @@ -705,7 +705,8 @@ sddr09_read_data(struct us_data *us, unsigned char *buffer; unsigned int lba, maxlba, pba; unsigned int page, pages; - unsigned int len, index, offset; + unsigned int len, offset; + struct scatterlist *sg; int result; // Figure out the initial LBA and page @@ -730,7 +731,8 @@ sddr09_read_data(struct us_data *us, // contiguous LBA's. Another exercise left to the student. result = 0; - index = offset = 0; + offset = 0; + sg = NULL; while (sectors > 0) { @@ -777,7 +779,7 @@ sddr09_read_data(struct us_data *us, // Store the data in the transfer buffer usb_stor_access_xfer_buf(buffer, len, us->srb, - &index, &offset, TO_XFER_BUF); + &sg, &offset, TO_XFER_BUF); page = 0; lba++; @@ -931,7 +933,8 @@ sddr09_write_data(struct us_data *us, unsigned int pagelen, blocklen; unsigned char *blockbuffer; unsigned char *buffer; - unsigned int len, index, offset; + unsigned int len, offset; + struct scatterlist *sg; int result; // Figure out the initial LBA and page @@ -968,7 +971,8 @@ sddr09_write_data(struct us_data *us, } result = 0; - index = offset = 0; + offset = 0; + sg = NULL; while (sectors > 0) { @@ -987,7 +991,7 @@ sddr09_write_data(struct us_data *us, // Get the data from the transfer buffer usb_stor_access_xfer_buf(buffer, len, us->srb, - &index, &offset, FROM_XFER_BUF); + &sg, &offset, FROM_XFER_BUF); result = sddr09_write_lba(us, lba, page, pages, buffer, blockbuffer); diff --git a/drivers/usb/storage/sddr55.c b/drivers/usb/storage/sddr55.c index 0b1b5b59ca7b..d43a3415e12f 100644 --- a/drivers/usb/storage/sddr55.c +++ b/drivers/usb/storage/sddr55.c @@ -167,7 +167,8 @@ static int sddr55_read_data(struct us_data *us, unsigned long address; unsigned short pages; - unsigned int len, index, offset; + unsigned int len, offset; + struct scatterlist *sg; // Since we only read in one block at a time, we have to create // a bounce buffer and move the data a piece at a time between the @@ -178,7 +179,8 @@ static int sddr55_read_data(struct us_data *us, buffer = kmalloc(len, GFP_NOIO); if (buffer == NULL) return USB_STOR_TRANSPORT_ERROR; /* out of memory */ - index = offset = 0; + offset = 0; + sg = NULL; while (sectors>0) { @@ -255,7 +257,7 @@ static int sddr55_read_data(struct us_data *us, // Store the data in the transfer buffer usb_stor_access_xfer_buf(buffer, len, us->srb, - &index, &offset, TO_XFER_BUF); + &sg, &offset, TO_XFER_BUF); page = 0; lba++; @@ -287,7 +289,8 @@ static int sddr55_write_data(struct us_data *us, unsigned short pages; int i; - unsigned int len, index, offset; + unsigned int len, offset; + struct scatterlist *sg; /* check if we are allowed to write */ if (info->read_only || info->force_read_only) { @@ -304,7 +307,8 @@ static int sddr55_write_data(struct us_data *us, buffer = kmalloc(len, GFP_NOIO); if (buffer == NULL) return USB_STOR_TRANSPORT_ERROR; - index = offset = 0; + offset = 0; + sg = NULL; while (sectors > 0) { @@ -322,7 +326,7 @@ static int sddr55_write_data(struct us_data *us, // Get the data from the transfer buffer usb_stor_access_xfer_buf(buffer, len, us->srb, - &index, &offset, FROM_XFER_BUF); + &sg, &offset, FROM_XFER_BUF); US_DEBUGP("Write %02X pages, to PBA %04X" " (LBA %04X) page %02X\n", diff --git a/drivers/usb/storage/shuttle_usbat.c b/drivers/usb/storage/shuttle_usbat.c index 17ca4d73577b..cb22a9ad1694 100644 --- a/drivers/usb/storage/shuttle_usbat.c +++ b/drivers/usb/storage/shuttle_usbat.c @@ -993,7 +993,8 @@ static int usbat_flash_read_data(struct us_data *us, unsigned char thistime; unsigned int totallen, alloclen; int len, result; - unsigned int sg_idx = 0, sg_offset = 0; + unsigned int sg_offset = 0; + struct scatterlist *sg = NULL; result = usbat_flash_check_media(us, info); if (result != USB_STOR_TRANSPORT_GOOD) @@ -1047,7 +1048,7 @@ static int usbat_flash_read_data(struct us_data *us, /* Store the data in the transfer buffer */ usb_stor_access_xfer_buf(buffer, len, us->srb, - &sg_idx, &sg_offset, TO_XFER_BUF); + &sg, &sg_offset, TO_XFER_BUF); sector += thistime; totallen -= len; @@ -1083,7 +1084,8 @@ static int usbat_flash_write_data(struct us_data *us, unsigned char thistime; unsigned int totallen, alloclen; int len, result; - unsigned int sg_idx = 0, sg_offset = 0; + unsigned int sg_offset = 0; + struct scatterlist *sg = NULL; result = usbat_flash_check_media(us, info); if (result != USB_STOR_TRANSPORT_GOOD) @@ -1122,7 +1124,7 @@ static int usbat_flash_write_data(struct us_data *us, /* Get the data from the transfer buffer */ usb_stor_access_xfer_buf(buffer, len, us->srb, - &sg_idx, &sg_offset, FROM_XFER_BUF); + &sg, &sg_offset, FROM_XFER_BUF); /* ATA command 0x30 (WRITE SECTORS) */ usbat_pack_ata_sector_cmd(command, thistime, sector, 0x30); @@ -1162,8 +1164,8 @@ static int usbat_hp8200e_handle_read10(struct us_data *us, unsigned char *buffer; unsigned int len; unsigned int sector; - unsigned int sg_segment = 0; unsigned int sg_offset = 0; + struct scatterlist *sg = NULL; US_DEBUGP("handle_read10: transfersize %d\n", srb->transfersize); @@ -1220,9 +1222,6 @@ static int usbat_hp8200e_handle_read10(struct us_data *us, sector |= short_pack(data[7+5], data[7+4]); transferred = 0; - sg_segment = 0; /* for keeping track of where we are in */ - sg_offset = 0; /* the scatter/gather list */ - while (transferred != srb->request_bufflen) { if (len > srb->request_bufflen - transferred) @@ -1255,7 +1254,7 @@ static int usbat_hp8200e_handle_read10(struct us_data *us, /* Store the data in the transfer buffer */ usb_stor_access_xfer_buf(buffer, len, srb, - &sg_segment, &sg_offset, TO_XFER_BUF); + &sg, &sg_offset, TO_XFER_BUF); /* Update the amount transferred and the sector number */ |