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lib/nvme: change in payload offset propagation path

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For requests split in _nvme_ns_cmd_split_request() the payload offset is
set after children are created using recurrent call _nvme_ns_cmd_rw().
This makes impossible to reset SGL to proper offset in
incomming patches that split non-PRP complaint SGL requests.

To change this the payload offset is set after each request is allocated
in _nvme_ns_cmd_rw() not in _nvme_ns_cmd_split_request().


Change-Id: I9d3b2e3bbd9d93a4c8a37e1db8c4e01276e2cacb
Signed-off-by: Pawel Wodkowski <pawelx.wodkowski@intel.com>
This commit is contained in:
Pawel Wodkowski 2016-12-13 17:23:52 +01:00 committed by Jim Harris
parent 636b078b09
commit 8a62ba51f2
1 changed files with 26 additions and 22 deletions
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48
lib/nvme/nvme_ns_cmd.c
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@ -34,8 +34,8 @@
#include "nvme_internal.h"
static struct nvme_request *_nvme_ns_cmd_rw(struct spdk_nvme_ns *ns,
const struct nvme_payload *payload, uint64_t lba,
uint32_t lba_count, spdk_nvme_cmd_cb cb_fn,
const struct nvme_payload *payload, uint32_t payload_offset, uint32_t md_offset,
uint64_t lba, uint32_t lba_count, spdk_nvme_cmd_cb cb_fn,
void *cb_arg, uint32_t opc, uint32_t io_flags,
uint16_t apptag_mask, uint16_t apptag);
@ -112,6 +112,7 @@ nvme_request_free_children(struct nvme_request *req)
static struct nvme_request *
_nvme_ns_cmd_split_request(struct spdk_nvme_ns *ns,
const struct nvme_payload *payload,
uint32_t payload_offset, uint32_t md_offset,
uint64_t lba, uint32_t lba_count,
spdk_nvme_cmd_cb cb_fn, void *cb_arg, uint32_t opc,
uint32_t io_flags, struct nvme_request *req,
@ -121,8 +122,6 @@ _nvme_ns_cmd_split_request(struct spdk_nvme_ns *ns,
uint32_t sector_size = ns->sector_size;
uint32_t md_size = ns->md_size;
uint32_t remaining_lba_count = lba_count;
uint32_t offset = 0;
uint32_t md_offset = 0;
struct nvme_request *child;
if (ns->flags & SPDK_NVME_NS_DPS_PI_SUPPORTED) {
@ -135,20 +134,17 @@ _nvme_ns_cmd_split_request(struct spdk_nvme_ns *ns,
lba_count = sectors_per_max_io - (lba & sector_mask);
lba_count = nvme_min(remaining_lba_count, lba_count);
child = _nvme_ns_cmd_rw(ns, payload, lba, lba_count, cb_fn,
child = _nvme_ns_cmd_rw(ns, payload, payload_offset, md_offset, lba, lba_count, cb_fn,
cb_arg, opc, io_flags, apptag_mask, apptag);
if (child == NULL) {
nvme_request_free_children(req);
return NULL;
}
child->payload_offset = offset;
/* for separate metadata buffer only */
if (payload->md)
child->md_offset = md_offset;
nvme_request_add_child(req, child);
remaining_lba_count -= lba_count;
lba += lba_count;
offset += lba_count * sector_size;
payload_offset += lba_count * sector_size;
md_offset += lba_count * md_size;
}
@ -186,6 +182,7 @@ _nvme_ns_cmd_setup_request(struct spdk_nvme_ns *ns, struct nvme_request *req,
static struct nvme_request *
_nvme_ns_cmd_rw(struct spdk_nvme_ns *ns, const struct nvme_payload *payload,
uint32_t payload_offset, uint32_t md_offset,
uint64_t lba, uint32_t lba_count, spdk_nvme_cmd_cb cb_fn, void *cb_arg, uint32_t opc,
uint32_t io_flags, uint16_t apptag_mask, uint16_t apptag)
{
@ -214,6 +211,9 @@ _nvme_ns_cmd_rw(struct spdk_nvme_ns *ns, const struct nvme_payload *payload,
return NULL;
}
req->payload_offset = payload_offset;
req->md_offset = md_offset;
/*
* Intel DC P3*00 NVMe controllers benefit from driver-assisted striping.
* If this controller defines a stripe boundary and this I/O spans a stripe
@ -223,10 +223,12 @@ _nvme_ns_cmd_rw(struct spdk_nvme_ns *ns, const struct nvme_payload *payload,
if (sectors_per_stripe > 0 &&
(((lba & (sectors_per_stripe - 1)) + lba_count) > sectors_per_stripe)) {
return _nvme_ns_cmd_split_request(ns, payload, lba, lba_count, cb_fn, cb_arg, opc,
return _nvme_ns_cmd_split_request(ns, payload, payload_offset, md_offset, lba, lba_count, cb_fn,
cb_arg, opc,
io_flags, req, sectors_per_stripe, sectors_per_stripe - 1, apptag_mask, apptag);
} else if (lba_count > sectors_per_max_io) {
return _nvme_ns_cmd_split_request(ns, payload, lba, lba_count, cb_fn, cb_arg, opc,
return _nvme_ns_cmd_split_request(ns, payload, payload_offset, md_offset, lba, lba_count, cb_fn,
cb_arg, opc,
io_flags, req, sectors_per_max_io, 0, apptag_mask, apptag);
}
@ -247,7 +249,8 @@ spdk_nvme_ns_cmd_read(struct spdk_nvme_ns *ns, struct spdk_nvme_qpair *qpair, vo
payload.u.contig = buffer;
payload.md = NULL;
req = _nvme_ns_cmd_rw(ns, &payload, lba, lba_count, cb_fn, cb_arg, SPDK_NVME_OPC_READ, io_flags, 0,
req = _nvme_ns_cmd_rw(ns, &payload, 0, 0, lba, lba_count, cb_fn, cb_arg, SPDK_NVME_OPC_READ,
io_flags, 0,
0);
if (req != NULL) {
return nvme_qpair_submit_request(qpair, req);
@ -270,7 +273,8 @@ spdk_nvme_ns_cmd_read_with_md(struct spdk_nvme_ns *ns, struct spdk_nvme_qpair *q
payload.u.contig = buffer;
payload.md = metadata;
req = _nvme_ns_cmd_rw(ns, &payload, lba, lba_count, cb_fn, cb_arg, SPDK_NVME_OPC_READ, io_flags,
req = _nvme_ns_cmd_rw(ns, &payload, 0, 0, lba, lba_count, cb_fn, cb_arg, SPDK_NVME_OPC_READ,
io_flags,
apptag_mask, apptag);
if (req != NULL) {
return nvme_qpair_submit_request(qpair, req);
@ -298,8 +302,8 @@ spdk_nvme_ns_cmd_readv(struct spdk_nvme_ns *ns, struct spdk_nvme_qpair *qpair,
payload.u.sgl.next_sge_fn = next_sge_fn;
payload.u.sgl.cb_arg = cb_arg;
req = _nvme_ns_cmd_rw(ns, &payload, lba, lba_count, cb_fn, cb_arg, SPDK_NVME_OPC_READ, io_flags, 0,
0);
req = _nvme_ns_cmd_rw(ns, &payload, 0, 0, lba, lba_count, cb_fn, cb_arg, SPDK_NVME_OPC_READ,
io_flags, 0, 0);
if (req != NULL) {
return nvme_qpair_submit_request(qpair, req);
} else {
@ -320,8 +324,8 @@ spdk_nvme_ns_cmd_write(struct spdk_nvme_ns *ns, struct spdk_nvme_qpair *qpair,
payload.u.contig = buffer;
payload.md = NULL;
req = _nvme_ns_cmd_rw(ns, &payload, lba, lba_count, cb_fn, cb_arg, SPDK_NVME_OPC_WRITE, io_flags, 0,
0);
req = _nvme_ns_cmd_rw(ns, &payload, 0, 0, lba, lba_count, cb_fn, cb_arg, SPDK_NVME_OPC_WRITE,
io_flags, 0, 0);
if (req != NULL) {
return nvme_qpair_submit_request(qpair, req);
} else {
@ -342,8 +346,8 @@ spdk_nvme_ns_cmd_write_with_md(struct spdk_nvme_ns *ns, struct spdk_nvme_qpair *
payload.u.contig = buffer;
payload.md = metadata;
req = _nvme_ns_cmd_rw(ns, &payload, lba, lba_count, cb_fn, cb_arg, SPDK_NVME_OPC_WRITE, io_flags,
apptag_mask, apptag);
req = _nvme_ns_cmd_rw(ns, &payload, 0, 0, lba, lba_count, cb_fn, cb_arg, SPDK_NVME_OPC_WRITE,
io_flags, apptag_mask, apptag);
if (req != NULL) {
return nvme_qpair_submit_request(qpair, req);
} else {
@ -370,8 +374,8 @@ spdk_nvme_ns_cmd_writev(struct spdk_nvme_ns *ns, struct spdk_nvme_qpair *qpair,
payload.u.sgl.next_sge_fn = next_sge_fn;
payload.u.sgl.cb_arg = cb_arg;
req = _nvme_ns_cmd_rw(ns, &payload, lba, lba_count, cb_fn, cb_arg, SPDK_NVME_OPC_WRITE, io_flags, 0,
0);
req = _nvme_ns_cmd_rw(ns, &payload, 0, 0, lba, lba_count, cb_fn, cb_arg, SPDK_NVME_OPC_WRITE,
io_flags, 0, 0);
if (req != NULL) {
return nvme_qpair_submit_request(qpair, req);
} else {