diff options
| author | Jianxiong Gao <jxgao@google.com> | 2021-02-01 10:30:17 -0800 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2021-02-26 10:52:50 -0500 |
| commit | 3d2d861eb03e8ee96dc430a54361c900cbe28afd (patch) | |
| tree | 71a546f83c0ddde280afb48d37c3f91e2890794a /drivers | |
| parent | 1f221a0d0dbf0e48ef3a9c62871281d6a7819f05 (diff) | |
nvme-pci: set min_align_mask
The PRP addressing scheme requires all PRP entries except for the
first one to have a zero offset into the NVMe controller pages (which
can be different from the Linux PAGE_SIZE). Use the min_align_mask
device parameter to ensure that swiotlb does not change the address
of the buffer modulo the device page size to ensure that the PRPs
won't be malformed.
Signed-off-by: Jianxiong Gao <jxgao@google.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Jianxiong Gao <jxgao@google.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/nvme/host/pci.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 81e6389b2042..83303e4e3019 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -2629,6 +2629,7 @@ static void nvme_reset_work(struct work_struct *work) * Don't limit the IOMMU merged segment size. */ dma_set_max_seg_size(dev->dev, 0xffffffff); + dma_set_min_align_mask(dev->dev, NVME_CTRL_PAGE_SIZE - 1); mutex_unlock(&dev->shutdown_lock); |