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| author | Klaus Jensen <k.jensen@samsung.com> | 2020-08-24 08:59:41 +0200 |
|---|---|---|
| committer | Klaus Jensen <k.jensen@samsung.com> | 2020-10-27 07:24:46 +0100 |
| commit | 9994f72bd8c379eda01503ef6a7b06b7900110c5 (patch) | |
| tree | 2bb7e15a15bbda4fb5fd43db117088869af8b2ee /hw | |
| parent | 2750384669ee038bd1f1fa33bbd4a660c351ea90 (diff) | |
| download | qemu-9994f72bd8c379eda01503ef6a7b06b7900110c5.zip qemu-9994f72bd8c379eda01503ef6a7b06b7900110c5.tar.gz qemu-9994f72bd8c379eda01503ef6a7b06b7900110c5.tar.bz2 | |
hw/block/nvme: add a lba to bytes helper
Add the nvme_l2b helper and use it for converting NLB and SLBA to byte
counts and offsets.
Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/block/nvme.c | 12 | ||||
| -rw-r--r-- | hw/block/nvme.h | 6 |
2 files changed, 10 insertions, 8 deletions
diff --git a/hw/block/nvme.c b/hw/block/nvme.c index d6d8324..59338b4 100644 --- a/hw/block/nvme.c +++ b/hw/block/nvme.c @@ -644,12 +644,10 @@ static uint16_t nvme_write_zeroes(NvmeCtrl *n, NvmeRequest *req) { NvmeRwCmd *rw = (NvmeRwCmd *)&req->cmd; NvmeNamespace *ns = req->ns; - const uint8_t lba_index = NVME_ID_NS_FLBAS_INDEX(ns->id_ns.flbas); - const uint8_t data_shift = ns->id_ns.lbaf[lba_index].ds; uint64_t slba = le64_to_cpu(rw->slba); uint32_t nlb = le16_to_cpu(rw->nlb) + 1; - uint64_t offset = slba << data_shift; - uint32_t count = nlb << data_shift; + uint64_t offset = nvme_l2b(ns, slba); + uint32_t count = nvme_l2b(ns, nlb); uint16_t status; trace_pci_nvme_write_zeroes(nvme_cid(req), slba, nlb); @@ -674,10 +672,8 @@ static uint16_t nvme_rw(NvmeCtrl *n, NvmeRequest *req) uint32_t nlb = le32_to_cpu(rw->nlb) + 1; uint64_t slba = le64_to_cpu(rw->slba); - uint8_t lba_index = NVME_ID_NS_FLBAS_INDEX(ns->id_ns.flbas); - uint8_t data_shift = ns->id_ns.lbaf[lba_index].ds; - uint64_t data_size = (uint64_t)nlb << data_shift; - uint64_t data_offset = slba << data_shift; + uint64_t data_size = nvme_l2b(ns, nlb); + uint64_t data_offset = nvme_l2b(ns, slba); int is_write = rw->opcode == NVME_CMD_WRITE ? 1 : 0; enum BlockAcctType acct = is_write ? BLOCK_ACCT_WRITE : BLOCK_ACCT_READ; uint16_t status; diff --git a/hw/block/nvme.h b/hw/block/nvme.h index 52ba794..1675c1e 100644 --- a/hw/block/nvme.h +++ b/hw/block/nvme.h @@ -77,6 +77,12 @@ static inline uint8_t nvme_ns_lbads(NvmeNamespace *ns) return nvme_ns_lbaf(ns)->ds; } +/* convert an LBA to the equivalent in bytes */ +static inline size_t nvme_l2b(NvmeNamespace *ns, uint64_t lba) +{ + return lba << nvme_ns_lbads(ns); +} + #define TYPE_NVME "nvme" #define NVME(obj) \ OBJECT_CHECK(NvmeCtrl, (obj), TYPE_NVME) |