From 99868af3d0a75cf6a515a9aa81bf0d7bcb39eadb Mon Sep 17 00:00:00 2001 From: Mark Cave-Ayland Date: Thu, 27 Oct 2016 16:29:13 -0400 Subject: dma-helpers: explicitly pass alignment into DMA helpers The hard-coded default alignment is BDRV_SECTOR_SIZE, however this is not necessarily the case for all platforms. Use this as the default alignment for all current callers. Signed-off-by: Mark Cave-Ayland Reviewed-by: Eric Blake Acked-by: John Snow Message-id: 1476445266-27503-2-git-send-email-mark.cave-ayland@ilande.co.uk Signed-off-by: John Snow --- dma-helpers.c | 21 ++++++++++++--------- hw/block/nvme.c | 6 ++++-- hw/ide/ahci.c | 2 ++ hw/ide/core.c | 6 +++--- hw/scsi/scsi-disk.c | 2 ++ include/sysemu/dma.h | 6 +++--- 6 files changed, 26 insertions(+), 17 deletions(-) diff --git a/dma-helpers.c b/dma-helpers.c index 9defc101b7..6f9d47ca50 100644 --- a/dma-helpers.c +++ b/dma-helpers.c @@ -73,6 +73,7 @@ typedef struct { AioContext *ctx; BlockAIOCB *acb; QEMUSGList *sg; + uint32_t align; uint64_t offset; DMADirection dir; int sg_cur_index; @@ -160,8 +161,9 @@ static void dma_blk_cb(void *opaque, int ret) return; } - if (dbs->iov.size & ~BDRV_SECTOR_MASK) { - qemu_iovec_discard_back(&dbs->iov, dbs->iov.size & ~BDRV_SECTOR_MASK); + if (!QEMU_IS_ALIGNED(dbs->iov.size, dbs->align)) { + qemu_iovec_discard_back(&dbs->iov, + QEMU_ALIGN_DOWN(dbs->iov.size, dbs->align)); } dbs->acb = dbs->io_func(dbs->offset, &dbs->iov, @@ -199,7 +201,7 @@ static const AIOCBInfo dma_aiocb_info = { }; BlockAIOCB *dma_blk_io(AioContext *ctx, - QEMUSGList *sg, uint64_t offset, + QEMUSGList *sg, uint64_t offset, uint32_t align, DMAIOFunc *io_func, void *io_func_opaque, BlockCompletionFunc *cb, void *opaque, DMADirection dir) @@ -212,6 +214,7 @@ BlockAIOCB *dma_blk_io(AioContext *ctx, dbs->sg = sg; dbs->ctx = ctx; dbs->offset = offset; + dbs->align = align; dbs->sg_cur_index = 0; dbs->sg_cur_byte = 0; dbs->dir = dir; @@ -234,11 +237,11 @@ BlockAIOCB *dma_blk_read_io_func(int64_t offset, QEMUIOVector *iov, } BlockAIOCB *dma_blk_read(BlockBackend *blk, - QEMUSGList *sg, uint64_t offset, + QEMUSGList *sg, uint64_t offset, uint32_t align, void (*cb)(void *opaque, int ret), void *opaque) { - return dma_blk_io(blk_get_aio_context(blk), - sg, offset, dma_blk_read_io_func, blk, cb, opaque, + return dma_blk_io(blk_get_aio_context(blk), sg, offset, align, + dma_blk_read_io_func, blk, cb, opaque, DMA_DIRECTION_FROM_DEVICE); } @@ -252,11 +255,11 @@ BlockAIOCB *dma_blk_write_io_func(int64_t offset, QEMUIOVector *iov, } BlockAIOCB *dma_blk_write(BlockBackend *blk, - QEMUSGList *sg, uint64_t offset, + QEMUSGList *sg, uint64_t offset, uint32_t align, void (*cb)(void *opaque, int ret), void *opaque) { - return dma_blk_io(blk_get_aio_context(blk), - sg, offset, dma_blk_write_io_func, blk, cb, opaque, + return dma_blk_io(blk_get_aio_context(blk), sg, offset, align, + dma_blk_write_io_func, blk, cb, opaque, DMA_DIRECTION_TO_DEVICE); } diff --git a/hw/block/nvme.c b/hw/block/nvme.c index cef3bb42f1..b380142028 100644 --- a/hw/block/nvme.c +++ b/hw/block/nvme.c @@ -258,8 +258,10 @@ static uint16_t nvme_rw(NvmeCtrl *n, NvmeNamespace *ns, NvmeCmd *cmd, req->has_sg = true; dma_acct_start(n->conf.blk, &req->acct, &req->qsg, acct); req->aiocb = is_write ? - dma_blk_write(n->conf.blk, &req->qsg, data_offset, nvme_rw_cb, req) : - dma_blk_read(n->conf.blk, &req->qsg, data_offset, nvme_rw_cb, req); + dma_blk_write(n->conf.blk, &req->qsg, data_offset, BDRV_SECTOR_SIZE, + nvme_rw_cb, req) : + dma_blk_read(n->conf.blk, &req->qsg, data_offset, BDRV_SECTOR_SIZE, + nvme_rw_cb, req); return NVME_NO_COMPLETE; } diff --git a/hw/ide/ahci.c b/hw/ide/ahci.c index 63ead21047..3c19bdadc5 100644 --- a/hw/ide/ahci.c +++ b/hw/ide/ahci.c @@ -1009,6 +1009,7 @@ static void execute_ncq_command(NCQTransferState *ncq_tfs) &ncq_tfs->sglist, BLOCK_ACCT_READ); ncq_tfs->aiocb = dma_blk_read(ide_state->blk, &ncq_tfs->sglist, ncq_tfs->lba << BDRV_SECTOR_BITS, + BDRV_SECTOR_SIZE, ncq_cb, ncq_tfs); break; case WRITE_FPDMA_QUEUED: @@ -1022,6 +1023,7 @@ static void execute_ncq_command(NCQTransferState *ncq_tfs) &ncq_tfs->sglist, BLOCK_ACCT_WRITE); ncq_tfs->aiocb = dma_blk_write(ide_state->blk, &ncq_tfs->sglist, ncq_tfs->lba << BDRV_SECTOR_BITS, + BDRV_SECTOR_SIZE, ncq_cb, ncq_tfs); break; default: diff --git a/hw/ide/core.c b/hw/ide/core.c index 7291677109..43709e545f 100644 --- a/hw/ide/core.c +++ b/hw/ide/core.c @@ -882,15 +882,15 @@ static void ide_dma_cb(void *opaque, int ret) switch (s->dma_cmd) { case IDE_DMA_READ: s->bus->dma->aiocb = dma_blk_read(s->blk, &s->sg, offset, - ide_dma_cb, s); + BDRV_SECTOR_SIZE, ide_dma_cb, s); break; case IDE_DMA_WRITE: s->bus->dma->aiocb = dma_blk_write(s->blk, &s->sg, offset, - ide_dma_cb, s); + BDRV_SECTOR_SIZE, ide_dma_cb, s); break; case IDE_DMA_TRIM: s->bus->dma->aiocb = dma_blk_io(blk_get_aio_context(s->blk), - &s->sg, offset, + &s->sg, offset, BDRV_SECTOR_SIZE, ide_issue_trim, s->blk, ide_dma_cb, s, DMA_DIRECTION_TO_DEVICE); break; diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c index 88beaf4bb8..a96319138a 100644 --- a/hw/scsi/scsi-disk.c +++ b/hw/scsi/scsi-disk.c @@ -341,6 +341,7 @@ static void scsi_do_read(SCSIDiskReq *r, int ret) r->req.resid -= r->req.sg->size; r->req.aiocb = dma_blk_io(blk_get_aio_context(s->qdev.conf.blk), r->req.sg, r->sector << BDRV_SECTOR_BITS, + BDRV_SECTOR_SIZE, sdc->dma_readv, r, scsi_dma_complete, r, DMA_DIRECTION_FROM_DEVICE); } else { @@ -539,6 +540,7 @@ static void scsi_write_data(SCSIRequest *req) r->req.resid -= r->req.sg->size; r->req.aiocb = dma_blk_io(blk_get_aio_context(s->qdev.conf.blk), r->req.sg, r->sector << BDRV_SECTOR_BITS, + BDRV_SECTOR_SIZE, sdc->dma_writev, r, scsi_dma_complete, r, DMA_DIRECTION_TO_DEVICE); } else { diff --git a/include/sysemu/dma.h b/include/sysemu/dma.h index 34c8eaf64e..c228c66513 100644 --- a/include/sysemu/dma.h +++ b/include/sysemu/dma.h @@ -199,14 +199,14 @@ typedef BlockAIOCB *DMAIOFunc(int64_t offset, QEMUIOVector *iov, void *opaque); BlockAIOCB *dma_blk_io(AioContext *ctx, - QEMUSGList *sg, uint64_t offset, + QEMUSGList *sg, uint64_t offset, uint32_t align, DMAIOFunc *io_func, void *io_func_opaque, BlockCompletionFunc *cb, void *opaque, DMADirection dir); BlockAIOCB *dma_blk_read(BlockBackend *blk, - QEMUSGList *sg, uint64_t offset, + QEMUSGList *sg, uint64_t offset, uint32_t align, BlockCompletionFunc *cb, void *opaque); BlockAIOCB *dma_blk_write(BlockBackend *blk, - QEMUSGList *sg, uint64_t offset, + QEMUSGList *sg, uint64_t offset, uint32_t align, BlockCompletionFunc *cb, void *opaque); uint64_t dma_buf_read(uint8_t *ptr, int32_t len, QEMUSGList *sg); uint64_t dma_buf_write(uint8_t *ptr, int32_t len, QEMUSGList *sg); -- cgit v1.2.3