diff options
| author | Keith Busch <kbusch@kernel.org> | 2025-08-13 08:31:47 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2025-08-25 07:44:39 -0600 |
| commit | 92fb75fd14b041038e30bc725ab4c1e625243573 (patch) | |
| tree | 0b055c1d5e24508cd9152d689848bc34964b344b /drivers/nvme/host/pci.c | |
| parent | dae75dead2359edd7c55e1964e0edf7d03535b31 (diff) | |
blk-mq-dma: require unmap caller provide p2p map type
In preparing for integrity dma mappings, we can't rely on the request
flag because data and metadata may have different mapping types.
Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Kanchan Joshi <joshi.k@samsung.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20250813153153.3260897-4-kbusch@meta.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/nvme/host/pci.c')
| -rw-r--r-- | drivers/nvme/host/pci.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 2c6d9506b172..111b6bc6c93e 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -261,6 +261,9 @@ enum nvme_iod_flags { /* single segment dma mapping */ IOD_SINGLE_SEGMENT = 1U << 2, + + /* DMA mapped with PCI_P2PDMA_MAP_BUS_ADDR */ + IOD_P2P_BUS_ADDR = 1U << 3, }; struct nvme_dma_vec { @@ -725,7 +728,8 @@ static void nvme_unmap_data(struct request *req) return; } - if (!blk_rq_dma_unmap(req, dma_dev, &iod->dma_state, iod->total_len)) { + if (!blk_rq_dma_unmap(req, dma_dev, &iod->dma_state, iod->total_len, + iod->flags & IOD_P2P_BUS_ADDR)) { if (nvme_pci_cmd_use_sgl(&iod->cmd)) nvme_free_sgls(req); else @@ -1000,6 +1004,9 @@ static blk_status_t nvme_map_data(struct request *req) if (!blk_rq_dma_map_iter_start(req, dev->dev, &iod->dma_state, &iter)) return iter.status; + if (iter.p2pdma.map == PCI_P2PDMA_MAP_BUS_ADDR) + iod->flags |= IOD_P2P_BUS_ADDR; + if (use_sgl == SGL_FORCED || (use_sgl == SGL_SUPPORTED && (sgl_threshold && nvme_pci_avg_seg_size(req) >= sgl_threshold))) |