From: hch@lst.de (Christoph Hellwig)
Subject: [PATCH 04/15] block: add dma_map_bvec helper
Date: Thu, 21 Mar 2019 16:10:26 -0700 [thread overview]
Message-ID: <20190321231037.25104-5-hch@lst.de> (raw)
In-Reply-To: <20190321231037.25104-1-hch@lst.de>
Provide a nice little shortcut for mapping a single bvec.
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
include/linux/blkdev.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 5279104527ad..322ff969659c 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -641,6 +641,10 @@ static inline bool blk_account_rq(struct request *rq)
#define rq_dma_dir(rq) \
(op_is_write(req_op(rq)) ? DMA_TO_DEVICE : DMA_FROM_DEVICE)
+#define dma_map_bvec(dev, bv, dir, attrs) \
+ dma_map_page_attrs(dev, (bv)->bv_page, (bv)->bv_offset, (bv)->bv_len, \
+ (dir), (attrs))
+
static inline bool queue_is_mq(struct request_queue *q)
{
return q->mq_ops;
--
2.20.1
next prev parent reply other threads:[~2019-03-21 23:10 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-21 23:10 [RFC] optimize nvme single segment I/O Christoph Hellwig
2019-03-21 23:10 ` [PATCH 01/15] block: add a req_bvec helper Christoph Hellwig
2019-03-25 5:07 ` Chaitanya Kulkarni
2019-03-27 14:16 ` Christoph Hellwig
2019-03-21 23:10 ` [PATCH 02/15] block: add a rq_integrity_vec helper Christoph Hellwig
2019-03-25 5:10 ` Chaitanya Kulkarni
2019-03-27 14:19 ` Christoph Hellwig
2019-03-21 23:10 ` [PATCH 03/15] block: add a rq_dma_dir helper Christoph Hellwig
2019-03-22 13:06 ` Johannes Thumshirn
2019-03-27 14:20 ` Christoph Hellwig
2019-03-28 10:26 ` Johannes Thumshirn
2019-03-25 5:11 ` Chaitanya Kulkarni
2019-03-21 23:10 ` Christoph Hellwig [this message]
2019-03-25 5:13 ` [PATCH 04/15] block: add dma_map_bvec helper Chaitanya Kulkarni
2019-03-21 23:10 ` [PATCH 05/15] nvme-pci: remove the unused iod->length field Christoph Hellwig
2019-03-25 5:14 ` Chaitanya Kulkarni
2019-03-21 23:10 ` [PATCH 06/15] nvme-pci: remove nvme_init_iod Christoph Hellwig
2019-03-25 5:19 ` Chaitanya Kulkarni
2019-03-27 14:21 ` Christoph Hellwig
2019-03-21 23:10 ` [PATCH 07/15] nvme-pci: move the call to nvme_cleanup_cmd out of nvme_unmap_data Christoph Hellwig
2019-03-25 5:21 ` Chaitanya Kulkarni
2019-03-21 23:10 ` [PATCH 08/15] nvme-pci: merge nvme_free_iod into nvme_unmap_data Christoph Hellwig
2019-03-25 5:22 ` Chaitanya Kulkarni
2019-03-21 23:10 ` [PATCH 09/15] nvme-pci: only call nvme_unmap_data for requests transferring data Christoph Hellwig
2019-03-25 5:23 ` Chaitanya Kulkarni
2019-03-21 23:10 ` [PATCH 10/15] nvme-pci: do not build a scatterlist to map metadata Christoph Hellwig
2019-03-25 5:27 ` Chaitanya Kulkarni
[not found] ` <20190828092057.GA15524@ming.t460p>
2019-09-12 1:02 ` Ming Lei
2019-09-12 8:20 ` Christoph Hellwig
2019-03-21 23:10 ` [PATCH 11/15] nvme-pci: split metadata handling from nvme_map_data / nvme_unmap_data Christoph Hellwig
2019-03-25 5:29 ` Chaitanya Kulkarni
2019-03-21 23:10 ` [PATCH 12/15] nvme-pci: remove the inline scatterlist optimization Christoph Hellwig
2019-03-25 5:30 ` Chaitanya Kulkarni
2019-03-21 23:10 ` [PATCH 13/15] nvme-pci: optimize mapping of small single segment requests Christoph Hellwig
2019-03-25 5:36 ` Chaitanya Kulkarni
2019-03-21 23:10 ` [PATCH 14/15] nvme-pci: optimize mapping single segment requests using SGLs Christoph Hellwig
2019-03-25 5:39 ` Chaitanya Kulkarni
2019-04-30 14:17 ` Klaus Birkelund
2019-04-30 14:32 ` Christoph Hellwig
2019-03-21 23:10 ` [PATCH 15/15] nvme-pci: tidy up nvme_map_data Christoph Hellwig
2019-03-25 5:40 ` Chaitanya Kulkarni
2019-03-22 15:44 ` [RFC] optimize nvme single segment I/O Jens Axboe
2019-03-27 14:24 ` Christoph Hellwig
2019-03-22 17:37 ` Keith Busch
2019-03-22 18:55 ` Sagi Grimberg
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