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nvme/tcp: Move tcp_req ordering bits to union

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This makes it easier to zerofy ordering bits.

Change-Id: If5696bfedfff1bf75e41c1449eac7fccb469e98b
Signed-off-by: Alexey Marchuk <alexeymar@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/4201
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Paul Luse <paul.e.luse@intel.com>
This commit is contained in:
Alexey Marchuk 2020-09-01 10:03:16 +03:00 committed by Tomasz Zawadzki
parent 8db652e17e
commit dc88d13129
1 changed files with 23 additions and 20 deletions
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43
lib/nvme/nvme_tcp.c
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@ -119,11 +119,16 @@ struct nvme_tcp_req {
uint32_t active_r2ts;
bool in_capsule_data;
/* It is used to track whether the req can be safely freed */
struct {
uint8_t send_ack : 1;
uint8_t data_recv : 1;
uint8_t r2t_recv : 1;
uint8_t reserved : 5;
union {
uint8_t raw;
struct {
/* The last send operation completed - kernel released send buffer */
uint8_t send_ack : 1;
/* Data transfer completed - target send resp or last data bit */
uint8_t data_recv : 1;
uint8_t r2t_recv : 1;
uint8_t reserved : 5;
} bits;
} ordering;
struct nvme_tcp_pdu *send_pdu;
struct iovec iov[NVME_TCP_MAX_SGL_DESCRIPTORS];
@ -173,9 +178,7 @@ nvme_tcp_req_get(struct nvme_tcp_qpair *tqpair)
tcp_req->r2tl_remain = 0;
tcp_req->active_r2ts = 0;
tcp_req->iovcnt = 0;
tcp_req->ordering.send_ack = 0;
tcp_req->ordering.data_recv = 0;
tcp_req->ordering.r2t_recv = 0;
tcp_req->ordering.raw = 0;
memset(tcp_req->send_pdu, 0, sizeof(struct nvme_tcp_pdu));
TAILQ_INSERT_TAIL(&tqpair->outstanding_reqs, tcp_req, link);
@ -508,7 +511,7 @@ nvme_tcp_req_init(struct nvme_tcp_qpair *tqpair, struct nvme_request *req,
static inline void
nvme_tcp_req_put_safe(struct nvme_tcp_req *tcp_req)
{
if (tcp_req->ordering.send_ack && tcp_req->ordering.data_recv) {
if (tcp_req->ordering.bits.send_ack && tcp_req->ordering.bits.data_recv) {
assert(tcp_req->state == NVME_TCP_REQ_ACTIVE);
assert(tcp_req->tqpair != NULL);
nvme_tcp_req_put(tcp_req->tqpair, tcp_req);
@ -520,9 +523,9 @@ nvme_tcp_qpair_cmd_send_complete(void *cb_arg)
{
struct nvme_tcp_req *tcp_req = cb_arg;
tcp_req->ordering.send_ack = 1;
tcp_req->ordering.bits.send_ack = 1;
/* Handle the r2t case */
if (spdk_unlikely(tcp_req->ordering.r2t_recv)) {
if (spdk_unlikely(tcp_req->ordering.bits.r2t_recv)) {
nvme_tcp_send_h2c_data(tcp_req);
} else {
nvme_tcp_req_put_safe(tcp_req);
@ -849,11 +852,11 @@ nvme_tcp_c2h_data_payload_handle(struct nvme_tcp_qpair *tqpair,
cpl.cid = tcp_req->cid;
cpl.sqid = tqpair->qpair.id;
nvme_tcp_req_complete(tcp_req, &cpl);
if (tcp_req->ordering.send_ack) {
if (tcp_req->ordering.bits.send_ack) {
(*reaped)++;
}
tcp_req->ordering.data_recv = 1;
tcp_req->ordering.bits.data_recv = 1;
nvme_tcp_req_put_safe(tcp_req);
}
}
@ -1031,11 +1034,11 @@ nvme_tcp_capsule_resp_hdr_handle(struct nvme_tcp_qpair *tqpair, struct nvme_tcp_
}
nvme_tcp_req_complete(tcp_req, &cpl);
if (tcp_req->ordering.send_ack) {
if (tcp_req->ordering.bits.send_ack) {
(*reaped)++;
}
tcp_req->ordering.data_recv = 1;
tcp_req->ordering.bits.data_recv = 1;
nvme_tcp_req_put_safe(tcp_req);
SPDK_DEBUGLOG(SPDK_LOG_NVME, "complete tcp_req(%p) on tqpair=%p\n", tcp_req, tqpair);
@ -1138,7 +1141,7 @@ nvme_tcp_qpair_h2c_data_send_complete(void *cb_arg)
assert(tcp_req != NULL);
tcp_req->ordering.send_ack = 1;
tcp_req->ordering.bits.send_ack = 1;
if (tcp_req->r2tl_remain) {
nvme_tcp_send_h2c_data(tcp_req);
} else {
@ -1159,8 +1162,8 @@ nvme_tcp_send_h2c_data(struct nvme_tcp_req *tcp_req)
uint32_t plen, pdo, alignment;
/* Reinit the send_ack and r2t_recv bits */
tcp_req->ordering.send_ack = 0;
tcp_req->ordering.r2t_recv = 0;
tcp_req->ordering.bits.send_ack = 0;
tcp_req->ordering.bits.r2t_recv = 0;
rsp_pdu = tcp_req->send_pdu;
memset(rsp_pdu, 0, sizeof(*rsp_pdu));
h2c_data = &rsp_pdu->hdr.h2c_data;
@ -1228,7 +1231,7 @@ nvme_tcp_r2t_hdr_handle(struct nvme_tcp_qpair *tqpair, struct nvme_tcp_pdu *pdu)
goto end;
}
tcp_req->ordering.r2t_recv = 1;
tcp_req->ordering.bits.r2t_recv = 1;
SPDK_DEBUGLOG(SPDK_LOG_NVME, "r2t info: r2to=%u, r2tl=%u for tqpair=%p\n", r2t->r2to, r2t->r2tl,
tqpair);
@ -1264,7 +1267,7 @@ nvme_tcp_r2t_hdr_handle(struct nvme_tcp_qpair *tqpair, struct nvme_tcp_pdu *pdu)
tcp_req->r2tl_remain = r2t->r2tl;
nvme_tcp_qpair_set_recv_state(tqpair, NVME_TCP_PDU_RECV_STATE_AWAIT_PDU_READY);
if (spdk_likely(tcp_req->ordering.send_ack)) {
if (spdk_likely(tcp_req->ordering.bits.send_ack)) {
nvme_tcp_send_h2c_data(tcp_req);
}
return;