diff options
| author | Keith Busch <keith.busch@intel.com> | 2012-07-26 11:29:57 -0600 |
|---|---|---|
| committer | Matthew Wilcox <matthew.r.wilcox@intel.com> | 2012-07-26 13:43:20 -0400 |
| commit | 8fc23e032debd682f5ba9fc524a5846c10d2c522 (patch) | |
| tree | b940a216734f2c947cfae5ac9a80b45a86c506e3 | |
| parent | a42ceccef0c43b46ff6bc1b12a7c1076ef243df1 (diff) | |
| download | linux-8fc23e032debd682f5ba9fc524a5846c10d2c522.tar.gz linux-8fc23e032debd682f5ba9fc524a5846c10d2c522.tar.bz2 linux-8fc23e032debd682f5ba9fc524a5846c10d2c522.zip | |
NVMe: Set block queue max sectors
Set the max hw sectors in a namespace's request queue if the nvme device
has a max data transfer size.
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
| -rw-r--r-- | drivers/block/nvme.c | 7 | ||||
| -rw-r--r-- | include/linux/nvme.h | 1 |
2 files changed, 8 insertions, 0 deletions
diff --git a/drivers/block/nvme.c b/drivers/block/nvme.c index 7bcd88205a41..11951fa11a90 100644 --- a/drivers/block/nvme.c +++ b/drivers/block/nvme.c @@ -78,6 +78,7 @@ struct nvme_dev { char serial[20]; char model[40]; char firmware_rev[8]; + u32 max_hw_sectors; }; /* @@ -1344,6 +1345,8 @@ static struct nvme_ns *nvme_alloc_ns(struct nvme_dev *dev, int nsid, lbaf = id->flbas & 0xf; ns->lba_shift = id->lbaf[lbaf].ds; blk_queue_logical_block_size(ns->queue, 1 << ns->lba_shift); + if (dev->max_hw_sectors) + blk_queue_max_hw_sectors(ns->queue, dev->max_hw_sectors); disk->major = nvme_major; disk->minors = NVME_MINORS; @@ -1485,6 +1488,10 @@ static int __devinit nvme_dev_add(struct nvme_dev *dev) memcpy(dev->serial, ctrl->sn, sizeof(ctrl->sn)); memcpy(dev->model, ctrl->mn, sizeof(ctrl->mn)); memcpy(dev->firmware_rev, ctrl->fr, sizeof(ctrl->fr)); + if (ctrl->mdts) { + int shift = NVME_CAP_MPSMIN(readq(&dev->bar->cap)) + 12; + dev->max_hw_sectors = 1 << (ctrl->mdts + shift - 9); + } id_ns = mem; for (i = 1; i <= nn; i++) { diff --git a/include/linux/nvme.h b/include/linux/nvme.h index 9490a00529f4..8c71d2004c6d 100644 --- a/include/linux/nvme.h +++ b/include/linux/nvme.h @@ -37,6 +37,7 @@ struct nvme_bar { #define NVME_CAP_TIMEOUT(cap) (((cap) >> 24) & 0xff) #define NVME_CAP_STRIDE(cap) (((cap) >> 32) & 0xf) +#define NVME_CAP_MPSMIN(cap) (((cap) >> 48) & 0xf) enum { NVME_CC_ENABLE = 1 << 0, |