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SUSE:SLE-12-SP2:Update
qemu-linux-user
0228-dma-helpers-change-BlockBackend-to-.patch
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File 0228-dma-helpers-change-BlockBackend-to-.patch of Package qemu-linux-user
From: Paolo Bonzini <pbonzini@redhat.com> Date: Mon, 23 May 2016 14:54:06 +0200 Subject: dma-helpers: change BlockBackend to opaque value in DMAIOFunc Callers of dma_blk_io have no way to pass extra data to the DMAIOFunc, because the original callback and opaque are gone by the time DMAIOFunc is called. On the other hand, the BlockBackend is usually derived from those extra data that you could pass to the DMAIOFunc (in the next patch, that would be the SCSIRequest). So change DMAIOFunc's prototype, decoupling it from blk_aio_readv and blk_aio_writev's. The new prototype loses the BlockBackend and gains an extra opaque value which, in the case of dma_blk_readv and dma_blk_writev, is of course used for the BlockBackend. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> (cherry picked from commit 8a8e63ebdd5a6605af6a9df07c62b2214e1a650c) [LM: BSC#1043176] Signed-off-by: Lin Ma <lma@suse.com> --- dma-helpers.c | 48 ++++++++++++++++++++++++++++++++------------ hw/ide/core.c | 14 +++++++------ hw/ide/internal.h | 6 +++--- hw/ide/macio.c | 2 +- include/sysemu/dma.h | 12 +++++------ 5 files changed, 53 insertions(+), 29 deletions(-) diff --git a/dma-helpers.c b/dma-helpers.c index af07aabb8183b3a2a9ad08528f08..b521d84ebdf19f144402cb82b024 100644 --- a/dma-helpers.c +++ b/dma-helpers.c @@ -70,7 +70,7 @@ void qemu_sglist_destroy(QEMUSGList *qsg) typedef struct { BlockAIOCB common; - BlockBackend *blk; + AioContext *ctx; BlockAIOCB *acb; QEMUSGList *sg; uint64_t offset; @@ -80,6 +80,7 @@ typedef struct { QEMUIOVector iov; QEMUBH *bh; DMAIOFunc *io_func; + void *io_func_opaque; } DMAAIOCB; static void dma_blk_cb(void *opaque, int ret); @@ -154,8 +155,7 @@ static void dma_blk_cb(void *opaque, int ret) if (dbs->iov.size == 0) { trace_dma_map_wait(dbs); - dbs->bh = aio_bh_new(blk_get_aio_context(dbs->blk), - reschedule_dma, dbs); + dbs->bh = aio_bh_new(dbs->ctx, reschedule_dma, dbs); cpu_register_map_client(dbs->bh); return; } @@ -164,8 +164,8 @@ static void dma_blk_cb(void *opaque, int ret) qemu_iovec_discard_back(&dbs->iov, dbs->iov.size & ~BDRV_SECTOR_MASK); } - dbs->acb = dbs->io_func(dbs->blk, dbs->offset, &dbs->iov, 0, - dma_blk_cb, dbs); + dbs->acb = dbs->io_func(dbs->offset, &dbs->iov, + dma_blk_cb, dbs, dbs->io_func_opaque); assert(dbs->acb); } @@ -191,23 +191,25 @@ static const AIOCBInfo dma_aiocb_info = { .cancel_async = dma_aio_cancel, }; -BlockAIOCB *dma_blk_io( - BlockBackend *blk, QEMUSGList *sg, uint64_t offset, - DMAIOFunc *io_func, BlockCompletionFunc *cb, +BlockAIOCB *dma_blk_io(AioContext *ctx, + QEMUSGList *sg, uint64_t offset, + DMAIOFunc *io_func, void *io_func_opaque, + BlockCompletionFunc *cb, void *opaque, DMADirection dir) { - DMAAIOCB *dbs = blk_aio_get(&dma_aiocb_info, blk, cb, opaque); + DMAAIOCB *dbs = qemu_aio_get(&dma_aiocb_info, NULL, cb, opaque); - trace_dma_blk_io(dbs, blk, offset, (dir == DMA_DIRECTION_TO_DEVICE)); + trace_dma_blk_io(dbs, io_func_opaque, offset, (dir == DMA_DIRECTION_TO_DEVICE)); dbs->acb = NULL; - dbs->blk = blk; dbs->sg = sg; + dbs->ctx = ctx; dbs->offset = offset; dbs->sg_cur_index = 0; dbs->sg_cur_byte = 0; dbs->dir = dir; dbs->io_func = io_func; + dbs->io_func_opaque = io_func_opaque; dbs->bh = NULL; qemu_iovec_init(&dbs->iov, sg->nsg); dma_blk_cb(dbs, 0); @@ -215,19 +217,39 @@ BlockAIOCB *dma_blk_io( } +static +BlockAIOCB *dma_blk_read_io_func(int64_t offset, QEMUIOVector *iov, + BlockCompletionFunc *cb, void *cb_opaque, + void *opaque) +{ + BlockBackend *blk = opaque; + return blk_aio_preadv(blk, offset, iov, 0, cb, cb_opaque); +} + BlockAIOCB *dma_blk_read(BlockBackend *blk, QEMUSGList *sg, uint64_t offset, void (*cb)(void *opaque, int ret), void *opaque) { - return dma_blk_io(blk, sg, offset, blk_aio_preadv, cb, opaque, + return dma_blk_io(blk_get_aio_context(blk), + sg, offset, dma_blk_read_io_func, blk, cb, opaque, DMA_DIRECTION_FROM_DEVICE); } +static +BlockAIOCB *dma_blk_write_io_func(int64_t offset, QEMUIOVector *iov, + BlockCompletionFunc *cb, void *cb_opaque, + void *opaque) +{ + BlockBackend *blk = opaque; + return blk_aio_pwritev(blk, offset, iov, 0, cb, cb_opaque); +} + BlockAIOCB *dma_blk_write(BlockBackend *blk, QEMUSGList *sg, uint64_t offset, void (*cb)(void *opaque, int ret), void *opaque) { - return dma_blk_io(blk, sg, offset, blk_aio_pwritev, cb, opaque, + return dma_blk_io(blk_get_aio_context(blk), + sg, offset, dma_blk_write_io_func, blk, cb, opaque, DMA_DIRECTION_TO_DEVICE); } diff --git a/hw/ide/core.c b/hw/ide/core.c index 98ead37c55636f7817b71eeaeac9..37d6562962c645f17b871a50ade3 100644 --- a/hw/ide/core.c +++ b/hw/ide/core.c @@ -441,13 +441,14 @@ static void ide_issue_trim_cb(void *opaque, int ret) } } -BlockAIOCB *ide_issue_trim(BlockBackend *blk, - int64_t offset, QEMUIOVector *qiov, BdrvRequestFlags flags, - BlockCompletionFunc *cb, void *opaque) +BlockAIOCB *ide_issue_trim( + int64_t offset, QEMUIOVector *qiov, + BlockCompletionFunc *cb, void *cb_opaque, void *opaque) { + BlockBackend *blk = opaque; TrimAIOCB *iocb; - iocb = blk_aio_get(&trim_aiocb_info, blk, cb, opaque); + iocb = blk_aio_get(&trim_aiocb_info, blk, cb, cb_opaque); iocb->blk = blk; iocb->bh = qemu_bh_new(ide_trim_bh_cb, iocb); iocb->ret = 0; @@ -873,8 +874,9 @@ static void ide_dma_cb(void *opaque, int ret) ide_dma_cb, s); break; case IDE_DMA_TRIM: - s->bus->dma->aiocb = dma_blk_io(s->blk, &s->sg, offset, - ide_issue_trim, ide_dma_cb, s, + s->bus->dma->aiocb = dma_blk_io(blk_get_aio_context(s->blk), + &s->sg, offset, + ide_issue_trim, s->blk, ide_dma_cb, s, DMA_DIRECTION_TO_DEVICE); break; default: diff --git a/hw/ide/internal.h b/hw/ide/internal.h index 6f0b4e15ed08545f155ce8fd6d40..bb0c8863f74dc50f499aaf02e07b 100644 --- a/hw/ide/internal.h +++ b/hw/ide/internal.h @@ -614,9 +614,9 @@ void ide_transfer_start(IDEState *s, uint8_t *buf, int size, EndTransferFunc *end_transfer_func); void ide_transfer_stop(IDEState *s); void ide_set_inactive(IDEState *s, bool more); -BlockAIOCB *ide_issue_trim(BlockBackend *blk, - int64_t offset, QEMUIOVector *qiov, BdrvRequestFlags flags, - BlockCompletionFunc *cb, void *opaque); +BlockAIOCB *ide_issue_trim( + int64_t offset, QEMUIOVector *qiov, + BlockCompletionFunc *cb, void *cb_opaque, void *opaque); BlockAIOCB *ide_buffered_readv(IDEState *s, int64_t sector_num, QEMUIOVector *iov, int nb_sectors, BlockCompletionFunc *cb, void *opaque); diff --git a/hw/ide/macio.c b/hw/ide/macio.c index ee5e0a6a2ec355b09c61de5fbf28..e566fd8715e81dc4994061cd0aac 100644 --- a/hw/ide/macio.c +++ b/hw/ide/macio.c @@ -230,7 +230,7 @@ static void pmac_dma_trim(BlockBackend *blk, s->io_buffer_index += io->len; io->len = 0; - s->bus->dma->aiocb = ide_issue_trim(blk, offset, &io->iov, 0, cb, io); + s->bus->dma->aiocb = ide_issue_trim(offset, &io->iov, cb, io, blk); } static void pmac_ide_atapi_transfer_cb(void *opaque, int ret) diff --git a/include/sysemu/dma.h b/include/sysemu/dma.h index bc4c669eee5110fa046d783273c3..e60d1e29ba489641918196f593f4 100644 --- a/include/sysemu/dma.h +++ b/include/sysemu/dma.h @@ -197,14 +197,14 @@ void qemu_sglist_add(QEMUSGList *qsg, dma_addr_t base, dma_addr_t len); void qemu_sglist_destroy(QEMUSGList *qsg); #endif -typedef BlockAIOCB *DMAIOFunc(BlockBackend *blk, int64_t offset, - QEMUIOVector *iov, BdrvRequestFlags flags, - BlockCompletionFunc *cb, void *opaque); +typedef BlockAIOCB *DMAIOFunc(int64_t offset, QEMUIOVector *iov, + BlockCompletionFunc *cb, void *cb_opaque, + void *opaque); -BlockAIOCB *dma_blk_io(BlockBackend *blk, +BlockAIOCB *dma_blk_io(AioContext *ctx, QEMUSGList *sg, uint64_t offset, - DMAIOFunc *io_func, BlockCompletionFunc *cb, - void *opaque, DMADirection dir); + DMAIOFunc *io_func, void *io_func_opaque, + BlockCompletionFunc *cb, void *opaque, DMADirection dir); BlockAIOCB *dma_blk_read(BlockBackend *blk, QEMUSGList *sg, uint64_t offset, BlockCompletionFunc *cb, void *opaque);
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