diff options
| author | Filippo Sironi <sironi@amazon.de> | 2021-02-10 01:39:42 +0100 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2021-02-10 16:38:06 +0100 |
| commit | 4bdf260362b3be529d170b04662638fd6dc52241 (patch) | |
| tree | ef13356d80908908c74f3090fec7f65d01d3d29d /drivers/nvme/host/nvme.h | |
| parent | ed7770f6628691c13c9423bce7eee7cff2399c12 (diff) | |
| download | linux-next-4bdf260362b3be529d170b04662638fd6dc52241.tar.gz | |
nvme: add 48-bit DMA address quirk for Amazon NVMe controllers
Some Amazon NVMe controllers do not follow the NVMe specification
and are limited to 48-bit DMA addresses. Add a quirk to force
bounce buffering if needed and limit the IOVA allocation for these
devices.
This affects all current Amazon NVMe controllers that expose EBS
volumes (0x0061, 0x0065, 0x8061) and local instance storage
(0xcd00, 0xcd01, 0xcd02).
Signed-off-by: Filippo Sironi <sironi@amazon.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/nvme/host/nvme.h')
| -rw-r--r-- | drivers/nvme/host/nvme.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index 2efb87642d18..07b34175c6ce 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -144,6 +144,12 @@ enum nvme_quirks { * NVMe 1.3 compliance. */ NVME_QUIRK_NO_NS_DESC_LIST = (1 << 15), + + /* + * The controller does not properly handle DMA addresses over + * 48 bits. + */ + NVME_QUIRK_DMA_ADDRESS_BITS_48 = (1 << 16), }; /* |