diff options
| author |   Igor Konopko <igor.j.konopko@intel.com> | 2018-12-11 20:16:24 +0100 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2018-12-11 12:22:35 -0700 |
| commit | 24828d0536bbedc9b265f2b01ffca99de3f6a7c7 (patch) | |
| tree | bf902aa63b71543db101677c5bfef73b7d757fee /drivers/nvme | |
| parent | lightnvm: pblk: add helpers for OOB metadata (diff) | |
| download | linux-dev-24828d0536bbedc9b265f2b01ffca99de3f6a7c7.tar.xz linux-dev-24828d0536bbedc9b265f2b01ffca99de3f6a7c7.zip | |
lightnvm: dynamic DMA pool entry size
Currently lightnvm and pblk uses single DMA pool, for which the entry
size always is equal to PAGE_SIZE. The contents of each entry allocated
from the DMA pool consists of a PPA list (8bytes * 64), leaving
56bytes * 64 space for metadata. Since the metadata field can be bigger,
such as 128 bytes, the static size does not cover this use-case.
This patch adds support for I/O metadata above 56 bytes by changing DMA
pool size based on device meta size and allows pblk to use OOB metadata
>=16B.
Reviewed-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Igor Konopko <igor.j.konopko@intel.com>
Signed-off-by: Matias Bjørling <mb@lightnvm.io>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/nvme')
| -rw-r--r-- | drivers/nvme/host/lightnvm.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c index 51d957ccf328..ba268d7cf141 100644 --- a/drivers/nvme/host/lightnvm.c +++ b/drivers/nvme/host/lightnvm.c @@ -732,11 +732,12 @@ static int nvme_nvm_submit_io_sync(struct nvm_dev *dev, struct nvm_rq *rqd) return ret; } -static void *nvme_nvm_create_dma_pool(struct nvm_dev *nvmdev, char *name) +static void *nvme_nvm_create_dma_pool(struct nvm_dev *nvmdev, char *name, + int size) { struct nvme_ns *ns = nvmdev->q->queuedata; - return dma_pool_create(name, ns->ctrl->dev, PAGE_SIZE, PAGE_SIZE, 0); + return dma_pool_create(name, ns->ctrl->dev, size, PAGE_SIZE, 0); } static void nvme_nvm_destroy_dma_pool(void *pool) |