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Use following method to calculate limits: atomic_write_max_bytes = flp2(NAWUPF ?: AWUPF) atomic_write_unit_min = logical_block_size atomic_write_unit_max = flp2(NAWUPF ?: AWUPF) atomic_write_boundary = NABSPF Signed-off-by: Alan Adamson Signed-off-by: John Garry --- drivers/nvme/host/core.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index d6a9bac91a4c..289561915ad3 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -1879,6 +1879,39 @@ static void nvme_update_disk_info(struct gendisk *disk, blk_queue_io_min(disk->queue, phys_bs); blk_queue_io_opt(disk->queue, io_opt); + atomic_bs = rounddown_pow_of_two(atomic_bs); + if (id->nsfeat & NVME_NS_FEAT_ATOMICS && id->nawupf) { + if (id->nabo) { + dev_err(ns->ctrl->device, "Support atomic NABO=%x\n", + id->nabo); + } else { + u32 boundary = 0; + + if (le16_to_cpu(id->nabspf)) + boundary = (le16_to_cpu(id->nabspf) + 1) * bs; + + if (!(boundary & (boundary - 1))) { + blk_queue_atomic_write_max_bytes(disk->queue, + atomic_bs); + blk_queue_atomic_write_unit_min(disk->queue, 1); + blk_queue_atomic_write_unit_max(disk->queue, + atomic_bs / bs); + blk_queue_atomic_write_boundary(disk->queue, + boundary); + } else { + dev_err(ns->ctrl->device, "Unsupported atomic boundary=0x%x\n", + boundary); + } + } + } else if (ns->ctrl->subsys->awupf) { + blk_queue_atomic_write_max_bytes(disk->queue, + atomic_bs); + blk_queue_atomic_write_unit_min(disk->queue, 1); + blk_queue_atomic_write_unit_max(disk->queue, + atomic_bs / bs); + blk_queue_atomic_write_boundary(disk->queue, 0); + } + /* * Register a metadata profile for PI, or the plain non-integrity NVMe * metadata masquerading as Type 0 if supported, otherwise reject block