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[PATCH 05/16] hw/block/nvme: consolidate read, write and write zeroes
From: |
Klaus Jensen |
Subject: |
[PATCH 05/16] hw/block/nvme: consolidate read, write and write zeroes |
Date: |
Thu, 24 Sep 2020 22:45:05 +0200 |
From: Klaus Jensen <k.jensen@samsung.com>
Consolidate the read/write and write zeroes functions.
Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
---
hw/block/nvme.h | 11 ++++++++
include/block/nvme.h | 2 ++
hw/block/nvme.c | 65 +++++++++++++++----------------------------
hw/block/trace-events | 3 +-
4 files changed, 37 insertions(+), 44 deletions(-)
diff --git a/hw/block/nvme.h b/hw/block/nvme.h
index e080a2318a50..ccf52ac7bb82 100644
--- a/hw/block/nvme.h
+++ b/hw/block/nvme.h
@@ -36,6 +36,17 @@ typedef struct NvmeRequest {
QTAILQ_ENTRY(NvmeRequest)entry;
} NvmeRequest;
+static inline bool nvme_req_is_write(NvmeRequest *req)
+{
+ switch (req->cmd.opcode) {
+ case NVME_CMD_WRITE:
+ case NVME_CMD_WRITE_ZEROES:
+ return true;
+ default:
+ return false;
+ }
+}
+
static inline const char *nvme_adm_opc_str(uint8_t opc)
{
switch (opc) {
diff --git a/include/block/nvme.h b/include/block/nvme.h
index 7a30cf285ae0..999b4f8ae0d4 100644
--- a/include/block/nvme.h
+++ b/include/block/nvme.h
@@ -438,6 +438,8 @@ typedef struct QEMU_PACKED NvmeCmd {
uint32_t cdw15;
} NvmeCmd;
+#define NVME_CMD_OPCODE_DATA_TRANSFER_MASK 0x3
+
#define NVME_CMD_FLAGS_FUSE(flags) (flags & 0x3)
#define NVME_CMD_FLAGS_PSDT(flags) ((flags >> 6) & 0x3)
diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index 27af2f0b38d5..795c7e7c529f 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -997,48 +997,19 @@ static uint16_t nvme_flush(NvmeCtrl *n, NvmeRequest *req)
return nvme_do_aio(ns->blkconf.blk, 0, 0, req);
}
-static uint16_t nvme_write_zeroes(NvmeCtrl *n, NvmeRequest *req)
+static uint16_t nvme_rwz(NvmeCtrl *n, NvmeRequest *req)
{
NvmeRwCmd *rw = (NvmeRwCmd *)&req->cmd;
NvmeNamespace *ns = req->ns;
+
uint64_t slba = le64_to_cpu(rw->slba);
uint32_t nlb = (uint32_t)le16_to_cpu(rw->nlb) + 1;
- uint64_t offset = nvme_l2b(ns, slba);
- uint32_t count = nvme_l2b(ns, nlb);
+ size_t len = nvme_l2b(ns, nlb);
+
uint16_t status;
- trace_pci_nvme_write_zeroes(nvme_cid(req), nvme_nsid(ns), slba, nlb);
-
- status = nvme_check_bounds(n, ns, slba, nlb);
- if (status) {
- trace_pci_nvme_err_invalid_lba_range(slba, nlb, ns->id_ns.nsze);
- return status;
- }
-
- return nvme_do_aio(ns->blkconf.blk, offset, count, req);
-}
-
-static uint16_t nvme_rw(NvmeCtrl *n, NvmeRequest *req)
-{
- NvmeRwCmd *rw = (NvmeRwCmd *)&req->cmd;
- NvmeNamespace *ns = req->ns;
- uint32_t nlb = (uint32_t)le16_to_cpu(rw->nlb) + 1;
- uint64_t slba = le64_to_cpu(rw->slba);
-
- uint64_t data_size = nvme_l2b(ns, nlb);
- uint64_t data_offset = nvme_l2b(ns, slba);
- enum BlockAcctType acct = req->cmd.opcode == NVME_CMD_WRITE ?
- BLOCK_ACCT_WRITE : BLOCK_ACCT_READ;
- uint16_t status;
-
- trace_pci_nvme_rw(nvme_cid(req), nvme_io_opc_str(rw->opcode),
- nvme_nsid(ns), nlb, data_size, slba);
-
- status = nvme_check_mdts(n, data_size);
- if (status) {
- trace_pci_nvme_err_mdts(nvme_cid(req), data_size);
- goto invalid;
- }
+ trace_pci_nvme_rwz(nvme_cid(req), nvme_io_opc_str(rw->opcode),
+ nvme_nsid(ns), nlb, len, slba);
status = nvme_check_bounds(n, ns, slba, nlb);
if (status) {
@@ -1046,15 +1017,26 @@ static uint16_t nvme_rw(NvmeCtrl *n, NvmeRequest *req)
goto invalid;
}
- status = nvme_map_dptr(n, data_size, req);
- if (status) {
- goto invalid;
+ if (req->cmd.opcode & NVME_CMD_OPCODE_DATA_TRANSFER_MASK) {
+ status = nvme_check_mdts(n, len);
+ if (status) {
+ trace_pci_nvme_err_mdts(nvme_cid(req), len);
+ goto invalid;
+ }
+
+ status = nvme_map_dptr(n, len, req);
+ if (status) {
+ goto invalid;
+ }
}
- return nvme_do_aio(ns->blkconf.blk, data_offset, data_size, req);
+ return nvme_do_aio(ns->blkconf.blk, nvme_l2b(ns, slba), len, req);
invalid:
- block_acct_invalid(blk_get_stats(ns->blkconf.blk), acct);
+ block_acct_invalid(blk_get_stats(ns->blkconf.blk),
+ nvme_req_is_write(req) ? BLOCK_ACCT_WRITE :
+ BLOCK_ACCT_READ);
+
return status;
}
@@ -1082,10 +1064,9 @@ static uint16_t nvme_io_cmd(NvmeCtrl *n, NvmeRequest
*req)
case NVME_CMD_FLUSH:
return nvme_flush(n, req);
case NVME_CMD_WRITE_ZEROES:
- return nvme_write_zeroes(n, req);
case NVME_CMD_WRITE:
case NVME_CMD_READ:
- return nvme_rw(n, req);
+ return nvme_rwz(n, req);
default:
trace_pci_nvme_err_invalid_opc(req->cmd.opcode);
return NVME_INVALID_OPCODE | NVME_DNR;
diff --git a/hw/block/trace-events b/hw/block/trace-events
index 9e7507c5abde..b18056c49836 100644
--- a/hw/block/trace-events
+++ b/hw/block/trace-events
@@ -40,9 +40,8 @@ pci_nvme_map_prp(uint64_t trans_len, uint32_t len, uint64_t
prp1, uint64_t prp2,
pci_nvme_map_sgl(uint16_t cid, uint8_t typ, uint64_t len) "cid %"PRIu16" type
0x%"PRIx8" len %"PRIu64""
pci_nvme_io_cmd(uint16_t cid, uint32_t nsid, uint16_t sqid, uint8_t opcode,
const char *opname) "cid %"PRIu16" nsid %"PRIu32" sqid %"PRIu16" opc 0x%"PRIx8"
opname '%s'"
pci_nvme_admin_cmd(uint16_t cid, uint16_t sqid, uint8_t opcode, const char
*opname) "cid %"PRIu16" sqid %"PRIu16" opc 0x%"PRIx8" opname '%s'"
-pci_nvme_rw(uint16_t cid, const char *verb, uint32_t nsid, uint32_t nlb,
uint64_t count, uint64_t lba) "cid %"PRIu16" opname '%s' nsid %"PRIu32" nlb
%"PRIu32" count %"PRIu64" lba 0x%"PRIx64""
+pci_nvme_rwz(uint16_t cid, const char *verb, uint32_t nsid, uint32_t nlb,
uint64_t len, uint64_t lba) "cid %"PRIu16" opname '%s' nsid %"PRIu32" nlb
%"PRIu32" len %"PRIu64" lba 0x%"PRIx64""
pci_nvme_rw_cb(uint16_t cid, const char *blkname) "cid %"PRIu16" blk '%s'"
-pci_nvme_write_zeroes(uint16_t cid, uint32_t nsid, uint64_t slba, uint32_t
nlb) "cid %"PRIu16" nsid %"PRIu32" slba %"PRIu64" nlb %"PRIu32""
pci_nvme_do_aio(uint16_t cid, uint8_t opc, const char *opname, const char
*blkname, int64_t offset, size_t len) "cid %"PRIu16" opc 0x%"PRIx8" opname '%s'
blk '%s' offset %"PRId64" len %zu"
pci_nvme_create_sq(uint64_t addr, uint16_t sqid, uint16_t cqid, uint16_t
qsize, uint16_t qflags) "create submission queue, addr=0x%"PRIx64",
sqid=%"PRIu16", cqid=%"PRIu16", qsize=%"PRIu16", qflags=%"PRIu16""
pci_nvme_create_cq(uint64_t addr, uint16_t cqid, uint16_t vector, uint16_t
size, uint16_t qflags, int ien) "create completion queue, addr=0x%"PRIx64",
cqid=%"PRIu16", vector=%"PRIu16", qsize=%"PRIu16", qflags=%"PRIu16", ien=%d"
--
2.28.0
- [PATCH 00/16] hw/block/nvme: zoned namespace command set, Klaus Jensen, 2020/09/24
- [PATCH 02/16] hw/block/nvme: add trace event for requests with non-zero status code, Klaus Jensen, 2020/09/24
- [PATCH 01/16] hw/block/nvme: add nsid to get/setfeat trace events, Klaus Jensen, 2020/09/24
- [PATCH 06/16] hw/block/nvme: add support for dulbe and block utilization tracking, Klaus Jensen, 2020/09/24
- [PATCH 04/16] hw/block/nvme: reject io commands if only admin command set selected, Klaus Jensen, 2020/09/24
- [PATCH 03/16] hw/block/nvme: make lba data size configurable, Klaus Jensen, 2020/09/24
- [PATCH 05/16] hw/block/nvme: consolidate read, write and write zeroes,
Klaus Jensen <=
- [PATCH 07/16] hw/block/nvme: add commands supported and effects log page, Klaus Jensen, 2020/09/24
- [PATCH 08/16] hw/block/nvme: support namespace types, Klaus Jensen, 2020/09/24
- [PATCH 10/16] hw/block/nvme: add the zone management receive command, Klaus Jensen, 2020/09/24
- [PATCH 09/16] hw/block/nvme: add basic read/write for zoned namespaces, Klaus Jensen, 2020/09/24
- [PATCH 11/16] hw/block/nvme: add the zone management send command, Klaus Jensen, 2020/09/24
- [PATCH 13/16] hw/block/nvme: track and enforce zone resources, Klaus Jensen, 2020/09/24
- [PATCH 16/16] hw/block/nvme: support reset/finish recommended limits, Klaus Jensen, 2020/09/24
- [PATCH 12/16] hw/block/nvme: add the zone append command, Klaus Jensen, 2020/09/24
- [PATCH 14/16] hw/block/nvme: allow open to close transitions by controller, Klaus Jensen, 2020/09/24
- [PATCH 15/16] hw/block/nvme: support zone active excursions, Klaus Jensen, 2020/09/24