/*
* Copyright (c) 2006-2016 Chelsio, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <config.h>
#include <stdio.h>
#include <syslog.h>
#include <pthread.h>
#include <sys/errno.h>
#include <infiniband/opcode.h>
#include <util/compiler.h>
#include "libcxgb4.h"
#include "cxgb4-abi.h"
static void insert_recv_cqe(struct t4_wq *wq, struct t4_cq *cq, u32 srqidx)
{
union t4_cqe cqe = {};
__be64 *gen = GEN_ADDR(&cqe);
PDBG("%s wq %p cq %p sw_cidx %u sw_pidx %u\n", __func__,
wq, cq, cq->sw_cidx, cq->sw_pidx);
cqe.com.header = htobe32(V_CQE_STATUS(T4_ERR_SWFLUSH) |
V_CQE_OPCODE(FW_RI_SEND) |
V_CQE_TYPE(0) |
V_CQE_SWCQE(1) |
V_CQE_QPID(wq->sq.qid));
*gen = htobe64(V_CQE_GENBIT((u64)cq->gen));
if (srqidx)
cqe.b64.u.srcqe.abs_rqe_idx = htobe32(srqidx);
memcpy(Q_ENTRY(cq->sw_queue, cq->sw_pidx), &cqe, CQE_SIZE(&cqe));
t4_swcq_produce(cq);
}
int c4iw_flush_rq(struct t4_wq *wq, struct t4_cq *cq, int count)
{
int flushed = 0;
int in_use = wq->rq.in_use - count;
BUG_ON(in_use < 0);
PDBG("%s wq %p cq %p rq.in_use %u skip count %u\n", __func__,
wq, cq, wq->rq.in_use, count);
while (in_use--) {
insert_recv_cqe(wq, cq, 0);
flushed++;
}
return flushed;
}
static void insert_sq_cqe(struct t4_wq *wq, struct t4_cq *cq,
struct t4_swsqe *swcqe)
{
union t4_cqe cqe = {};
__be64 *gen = GEN_ADDR(&cqe);
PDBG("%s wq %p cq %p sw_cidx %u sw_pidx %u\n", __func__,
wq, cq, cq->sw_cidx, cq->sw_pidx);
cqe.com.header = htobe32(V_CQE_STATUS(T4_ERR_SWFLUSH) |
V_CQE_OPCODE(swcqe->opcode) |
V_CQE_TYPE(1) |
V_CQE_SWCQE(1) |
V_CQE_QPID(wq->sq.qid));
CQE_WRID_SQ_IDX(&cqe.com) = swcqe->idx;
*gen = htobe64(V_CQE_GENBIT((u64)cq->gen));
memcpy(Q_ENTRY(cq->sw_queue, cq->sw_pidx), &cqe, CQE_SIZE(&cqe));
t4_swcq_produce(cq);
}
static void advance_oldest_read(struct t4_wq *wq);
void c4iw_flush_sq(struct c4iw_qp *qhp)
{
unsigned short flushed = 0;
struct t4_wq *wq = &qhp->wq;
struct c4iw_cq *chp = to_c4iw_cq(qhp->ibv_qp.send_cq);
struct t4_cq *cq = &chp->cq;
int idx;
struct t4_swsqe *swsqe;
if (wq->sq.flush_cidx == -1)
wq->sq.flush_cidx = wq->sq.cidx;
idx = wq->sq.flush_cidx;
BUG_ON(idx >= wq->sq.size);
while (idx != wq->sq.pidx) {
swsqe = &wq->sq.sw_sq[idx];
BUG_ON(swsqe->flushed);
swsqe->flushed = 1;
insert_sq_cqe(wq, cq, swsqe);
if (wq->sq.oldest_read == swsqe) {
BUG_ON(swsqe->opcode != FW_RI_READ_REQ);
advance_oldest_read(wq);
}
flushed++;
if (++idx == wq->sq.size)
idx = 0;
}
wq->sq.flush_cidx += flushed;
if (wq->sq.flush_cidx >= wq->sq.size)
wq->sq.flush_cidx -= wq->sq.size;
}
static void flush_completed_wrs(struct t4_wq *wq, struct t4_cq *cq)
{
struct t4_swsqe *swsqe;
unsigned short cidx;
if (wq->sq.flush_cidx == -1)
wq->sq.flush_cidx = wq->sq.cidx;
cidx = wq->sq.flush_cidx;
BUG_ON(cidx >= wq->sq.size);
while (cidx != wq->sq.pidx) {
swsqe = &wq->sq.sw_sq[cidx];
if (!swsqe->signaled) {
if (++cidx == wq->sq.size)
cidx = 0;
} else if (swsqe->complete) {
BUG_ON(swsqe->flushed);
/*
* Insert this completed cqe into the swcq.
*/
PDBG("%s moving cqe into swcq sq idx %u cq idx %u\n",
__func__, cidx, cq->sw_pidx);
swsqe->cqe.com.header |= htobe32(V_CQE_SWCQE(1));
memcpy(Q_ENTRY(cq->sw_queue, cq->sw_pidx),
&swsqe->cqe, CQE_SIZE(&swsqe->cqe));
t4_swcq_produce(cq);
swsqe->flushed = 1;
if (++cidx == wq->sq.size)
cidx = 0;
wq->sq.flush_cidx = cidx;
} else
break;
}
}
static void create_read_req_cqe(struct t4_wq *wq, union t4_cqe *hw_cqe,
union t4_cqe *read_cqe)
{
__be64 *gen = GEN_ADDR(read_cqe);
memset(read_cqe, 0, sizeof(*read_cqe));
read_cqe->com.u.scqe.cidx = wq->sq.oldest_read->idx;
read_cqe->com.len = be32toh(wq->sq.oldest_read->read_len);
read_cqe->com.header = htobe32(V_CQE_QPID(CQE_QPID(&hw_cqe->com)) |
V_CQE_SWCQE(SW_CQE(&hw_cqe->com)) |
V_CQE_OPCODE(FW_RI_READ_REQ) |
V_CQE_TYPE(1));
*gen = GEN_BIT(hw_cqe);
}
static void advance_oldest_read(struct t4_wq *wq)
{
u32 rptr = wq->sq.oldest_read - wq->sq.sw_sq + 1;
if (rptr == wq->sq.size)
rptr = 0;
while (rptr != wq->sq.pidx) {
wq->sq.oldest_read = &wq->sq.sw_sq[rptr];
if (wq->sq.oldest_read->opcode == FW_RI_READ_REQ)
return;
if (++rptr == wq->sq.size)
rptr = 0;
}
wq->sq.oldest_read = NULL;
}
/*
* Move all CQEs from the HWCQ into the SWCQ.
* Deal with out-of-order and/or completions that complete
* prior unsignalled WRs.
*/
void c4iw_flush_hw_cq(struct c4iw_cq *chp, struct c4iw_qp *flush_qhp)
{
union t4_cqe *hw_cqe, *swcqe, read_cqe;
struct t4_cqe_common *com;
struct c4iw_qp *qhp;
struct t4_swsqe *swsqe;
int ret;
PDBG("%s cqid 0x%x\n", __func__, chp->cq.cqid);
ret = t4_next_hw_cqe(&chp->cq, &hw_cqe);
com = &hw_cqe->com;
/*
* This logic is similar to poll_cq(), but not quite the same
* unfortunately. Need to move pertinent HW CQEs to the SW CQ but
* also do any translation magic that poll_cq() normally does.
*/
while (!ret) {
qhp = get_qhp(chp->rhp, CQE_QPID(com));
/*
* drop CQEs with no associated QP
*/
if (qhp == NULL)
goto next_cqe;
if (flush_qhp != qhp) {
pthread_spin_lock(&qhp->lock);
if (qhp->wq.flushed == 1) {
goto next_cqe;
}
}
if (CQE_OPCODE(com) == FW_RI_TERMINATE)
goto next_cqe;
if (CQE_OPCODE(com) == FW_RI_READ_RESP) {
/*
* If we have reached here because of async
* event or other error, and have egress error
* then drop
*/
if (CQE_TYPE(com) == 1) {
syslog(LOG_CRIT, "%s: got egress error in \
read-response, dropping!\n", __func__);
goto next_cqe;
}
/*
* drop peer2peer RTR reads.
*/
if (CQE_WRID_STAG(com) == 1)
goto next_cqe;
/*
* Eat completions for unsignaled read WRs.
*/
if (!qhp->wq.sq.oldest_read->signaled) {
advance_oldest_read(&qhp->wq);
goto next_cqe;
}
/*
* Don't write to the HWCQ, create a new read req CQE
* in local memory and move it into the swcq.
*/
create_read_req_cqe(&qhp->wq, hw_cqe, &read_cqe);
hw_cqe = &read_cqe;
com = &hw_cqe->com;
advance_oldest_read(&qhp->wq);
}
/* if its a SQ completion, then do the magic to move all the
* unsignaled and now in-order completions into the swcq.
*/
if (SQ_TYPE(com)) {
int idx = CQE_WRID_SQ_IDX(com);
BUG_ON(idx >= qhp->wq.sq.size);
swsqe = &qhp->wq.sq.sw_sq[idx];
swsqe->cqe = *hw_cqe;
swsqe->complete = 1;
flush_completed_wrs(&qhp->wq, &chp->cq);
} else {
swcqe = Q_ENTRY(chp->cq.sw_queue, chp->cq.sw_pidx);
memcpy(swcqe, hw_cqe, CQE_SIZE(hw_cqe));
swcqe->com.header |= htobe32(V_CQE_SWCQE(1));
t4_swcq_produce(&chp->cq);
}
next_cqe:
t4_hwcq_consume(&chp->cq);
ret = t4_next_hw_cqe(&chp->cq, &hw_cqe);
if (qhp && flush_qhp != qhp)
pthread_spin_unlock(&qhp->lock);
}
}
static int cqe_completes_wr(union t4_cqe *cqe, struct t4_wq *wq)
{
struct t4_cqe_common *com = &cqe->com;
if (CQE_OPCODE(com) == FW_RI_TERMINATE)
return 0;
if ((CQE_OPCODE(com) == FW_RI_RDMA_WRITE) && RQ_TYPE(com))
return 0;
if ((CQE_OPCODE(com) == FW_RI_READ_RESP) && SQ_TYPE(com))
return 0;
if (CQE_SEND_OPCODE(com) && RQ_TYPE(com) && t4_rq_empty(wq))
return 0;
return 1;
}
void c4iw_count_rcqes(struct t4_cq *cq, struct t4_wq *wq, int *count)
{
struct t4_cqe_common *com;
union t4_cqe *cqe;
u32 ptr;
*count = 0;
ptr = cq->sw_cidx;
BUG_ON(ptr >= cq->size);
while (ptr != cq->sw_pidx) {
cqe = Q_ENTRY(cq->sw_queue, ptr);
com = &cqe->com;
if (RQ_TYPE(com) && (CQE_OPCODE(com) != FW_RI_READ_RESP) &&
(CQE_QPID(com) == wq->sq.qid) && cqe_completes_wr(cqe, wq))
(*count)++;
if (++ptr == cq->size)
ptr = 0;
}
PDBG("%s cq %p count %d\n", __func__, cq, *count);
}
static void dump_cqe(void *arg)
{
u64 *p = arg;
syslog(LOG_NOTICE, "cxgb4 err cqe %016llx %016llx %016llx %016llx\n",
(long long)be64toh(p[0]),
(long long)be64toh(p[1]),
(long long)be64toh(p[2]),
(long long)be64toh(p[3]));
if (is_64b_cqe)
syslog(LOG_NOTICE,
"cxgb4 err cqe %016llx %016llx %016llx %016llx\n",
(long long)be64toh(p[4]),
(long long)be64toh(p[5]),
(long long)be64toh(p[6]),
(long long)be64toh(p[7]));
}
static void post_pending_srq_wrs(struct t4_srq *srq)
{
struct t4_srq_pending_wr *pwr;
u16 idx = 0;
while (srq->pending_in_use) {
assert(!srq->sw_rq[srq->pidx].valid);
pwr = &srq->pending_wrs[srq->pending_cidx];
srq->sw_rq[srq->pidx].wr_id = pwr->wr_id;
srq->sw_rq[srq->pidx].valid = 1;
PDBG("%s posting pending cidx %u pidx %u wq_pidx %u in_use %u rq_size %u wr_id %llx\n",
__func__, srq->cidx, srq->pidx, srq->wq_pidx,
srq->in_use, srq->size, (unsigned long long)pwr->wr_id);
c4iw_copy_wr_to_srq(srq, &pwr->wqe, pwr->len16);
t4_srq_consume_pending_wr(srq);
t4_srq_produce(srq, pwr->len16);
idx += DIV_ROUND_UP(pwr->len16*16, T4_EQ_ENTRY_SIZE);
}
if (idx) {
t4_ring_srq_db(srq, idx, pwr->len16, &pwr->wqe);
srq->queue[srq->size].status.host_wq_pidx =
srq->wq_pidx;
}
}
static u64 reap_srq_cqe(union t4_cqe *hw_cqe, struct t4_srq *srq)
{
int rel_idx = CQE_ABS_RQE_IDX(&hw_cqe->b64) - srq->rqt_abs_idx;
u64 wr_id;
BUG_ON(rel_idx >= srq->size);
assert(srq->sw_rq[rel_idx].valid);
srq->sw_rq[rel_idx].valid = 0;
wr_id = srq->sw_rq[rel_idx].wr_id;
if (rel_idx == srq->cidx) {
PDBG("%s in order cqe rel_idx %u cidx %u pidx %u wq_pidx %u in_use %u rq_size %u wr_id %llx\n",
__func__, rel_idx, srq->cidx, srq->pidx,
srq->wq_pidx, srq->in_use, srq->size,
(unsigned long long)srq->sw_rq[rel_idx].wr_id);
t4_srq_consume(srq);
while (srq->ooo_count && !srq->sw_rq[srq->cidx].valid) {
PDBG("%s eat ooo cidx %u pidx %u wq_pidx %u in_use %u rq_size %u ooo_count %u wr_id %llx\n",
__func__, srq->cidx, srq->pidx, srq->wq_pidx,
srq->in_use, srq->size, srq->ooo_count,
(unsigned long long)srq->sw_rq[srq->cidx].wr_id);
t4_srq_consume_ooo(srq);
}
if (srq->ooo_count == 0 && srq->pending_in_use)
post_pending_srq_wrs(srq);
} else {
BUG_ON(srq->in_use == 0);
PDBG("%s ooo cqe rel_idx %u cidx %u pidx %u wq_pidx %u in_use %u rq_size %u ooo_count %u wr_id %llx\n",
__func__, rel_idx, srq->cidx, srq->pidx,
srq->wq_pidx, srq->in_use, srq->size, srq->ooo_count,
(unsigned long long)srq->sw_rq[rel_idx].wr_id);
t4_srq_produce_ooo(srq);
}
return wr_id;
}
/*
* poll_cq
*
* Caller must:
* check the validity of the first CQE,
* supply the wq assicated with the qpid.
*
* credit: cq credit to return to sge.
* cqe_flushed: 1 iff the CQE is flushed.
* cqe: copy of the polled CQE.
*
* return value:
* 0 CQE returned ok.
* -EAGAIN CQE skipped, try again.
* -EOVERFLOW CQ overflow detected.
*/
static int poll_cq(struct t4_wq *wq, struct t4_cq *cq,
union t4_cqe *cqe, u8 *cqe_flushed,
u64 *cookie, u32 *credit, struct t4_srq *srq)
{
int ret = 0;
union t4_cqe *hw_cqe, read_cqe;
struct t4_cqe_common *com;
*cqe_flushed = 0;
*credit = 0;
ret = t4_next_cqe(cq, &hw_cqe);
if (ret)
return ret;
com = &hw_cqe->com;
PDBG("%s CQE OVF %u qpid 0x%0x genbit %u type %u status 0x%0x"
" opcode 0x%0x len 0x%0x wrid_hi_stag 0x%x wrid_low_msn 0x%x\n",
__func__,
is_64b_cqe ? CQE_OVFBIT(&hw_cqe->b64) : CQE_OVFBIT(&hw_cqe->b32),
CQE_QPID(com),
is_64b_cqe ? CQE_GENBIT(&hw_cqe->b64) : CQE_GENBIT(&hw_cqe->b32),
CQE_TYPE(com), CQE_STATUS(com), CQE_OPCODE(com), CQE_LEN(com),
CQE_WRID_HI(com), CQE_WRID_LOW(com));
/*
* skip cqe's not affiliated with a QP.
*/
if (wq == NULL) {
ret = -EAGAIN;
goto skip_cqe;
}
/*
* skip HW cqe's if wq is already flushed.
*/
if (wq->flushed && !SW_CQE(com)) {
ret = -EAGAIN;
goto skip_cqe;
}
/*
* Gotta tweak READ completions:
* 1) the cqe doesn't contain the sq_wptr from the wr.
* 2) opcode not reflected from the wr.
* 3) read_len not reflected from the wr.
* 4) T4 HW (for now) inserts target read response failures which
* need to be skipped.
*/
if (CQE_OPCODE(com) == FW_RI_READ_RESP) {
/*
* If we have reached here because of async
* event or other error, and have egress error
* then drop
*/
if (CQE_TYPE(com) == 1) {
syslog(LOG_CRIT, "%s: got egress error in \
read-response, dropping!\n", __func__);
if (CQE_STATUS(com))
t4_set_wq_in_error(wq);
ret = -EAGAIN;
goto skip_cqe;
}
/*
* If this is an unsolicited read response, then the read
* was generated by the kernel driver as part of peer-2-peer
* connection setup, or a target read response failure.
* So skip the completion.
*/
if (CQE_WRID_STAG(com) == 1) {
if (CQE_STATUS(com))
t4_set_wq_in_error(wq);
ret = -EAGAIN;
goto skip_cqe;
}
/*
* Eat completions for unsignaled read WRs.
*/
if (!wq->sq.oldest_read->signaled) {
advance_oldest_read(wq);
ret = -EAGAIN;
goto skip_cqe;
}
/*
* Don't write to the HWCQ, so create a new read req CQE
* in local memory.
*/
create_read_req_cqe(wq, hw_cqe, &read_cqe);
hw_cqe = &read_cqe;
com = &hw_cqe->com;
advance_oldest_read(wq);
}
if (CQE_OPCODE(com) == FW_RI_TERMINATE) {
ret = -EAGAIN;
goto skip_cqe;
}
if (CQE_STATUS(com) || t4_wq_in_error(wq)) {
*cqe_flushed = (CQE_STATUS(com) == T4_ERR_SWFLUSH);
wq->error = 1;
if (!*cqe_flushed && CQE_STATUS(com))
dump_cqe(hw_cqe);
assert(!((*cqe_flushed == 0) && !SW_CQE(com)));
goto proc_cqe;
}
/*
* RECV completion.
*/
if (RQ_TYPE(com)) {
/*
* HW only validates 4 bits of MSN. So we must validate that
* the MSN in the SEND is the next expected MSN. If its not,
* then we complete this with T4_ERR_MSN and mark the wq in
* error.
*/
if (srq ? t4_srq_empty(srq) : t4_rq_empty(wq)) {
t4_set_wq_in_error(wq);
ret = -EAGAIN;
goto skip_cqe;
}
if (unlikely((CQE_WRID_MSN(com) != (wq->rq.msn)))) {
t4_set_wq_in_error(wq);
hw_cqe->com.header |= htobe32(V_CQE_STATUS(T4_ERR_MSN));
goto proc_cqe;
}
goto proc_cqe;
}
/*
* If we get here its a send completion.
*
* Handle out of order completion. These get stuffed
* in the SW SQ. Then the SW SQ is walked to move any
* now in-order completions into the SW CQ. This handles
* 2 cases:
* 1) reaping unsignaled WRs when the first subsequent
* signaled WR is completed.
* 2) out of order read completions.
*/
if (!SW_CQE(com) && (CQE_WRID_SQ_IDX(com) != wq->sq.cidx)) {
struct t4_swsqe *swsqe;
int idx = CQE_WRID_SQ_IDX(com);
PDBG("%s out of order completion going in sw_sq at idx %u\n",
__func__, idx);
BUG_ON(idx >= wq->sq.size);
swsqe = &wq->sq.sw_sq[idx];
swsqe->cqe = *hw_cqe;
swsqe->complete = 1;
ret = -EAGAIN;
goto flush_wq;
}
proc_cqe:
*cqe = *hw_cqe;
/*
* Reap the associated WR(s) that are freed up with this
* completion.
*/
if (SQ_TYPE(com)) {
int idx = CQE_WRID_SQ_IDX(com);
BUG_ON(idx >= wq->sq.size);
/*
* Account for any unsignaled completions completed by
* this signaled completion. In this case, cidx points
* to the first unsignaled one, and idx points to the
* signaled one. So adjust in_use based on this delta.
* if this is not completing any unsigned wrs, then the
* delta will be 0. Handle wrapping also!
*/
if (idx < wq->sq.cidx)
wq->sq.in_use -= wq->sq.size + idx - wq->sq.cidx;
else
wq->sq.in_use -= idx - wq->sq.cidx;
BUG_ON(wq->sq.in_use <= 0 || wq->sq.in_use >= wq->sq.size);
wq->sq.cidx = (u16)idx;
PDBG("%s completing sq idx %u\n", __func__, wq->sq.cidx);
*cookie = wq->sq.sw_sq[wq->sq.cidx].wr_id;
t4_sq_consume(wq);
} else {
if (!srq) {
PDBG("%s completing rq idx %u\n",
__func__, wq->rq.cidx);
BUG_ON(wq->rq.cidx >= wq->rq.size);
*cookie = wq->rq.sw_rq[wq->rq.cidx].wr_id;
BUG_ON(t4_rq_empty(wq));
t4_rq_consume(wq);
} else
*cookie = reap_srq_cqe(hw_cqe, srq);
wq->rq.msn++;
goto skip_cqe;
}
flush_wq:
/*
* Flush any completed cqes that are now in-order.
*/
flush_completed_wrs(wq, cq);
skip_cqe:
if (SW_CQE(com)) {
PDBG("%s cq %p cqid 0x%x skip sw cqe cidx %u\n",
__func__, cq, cq->cqid, cq->sw_cidx);
t4_swcq_consume(cq);
} else {
PDBG("%s cq %p cqid 0x%x skip hw cqe cidx %u\n",
__func__, cq, cq->cqid, cq->cidx);
t4_hwcq_consume(cq);
}
return ret;
}
static void generate_srq_limit_event(struct c4iw_srq *srq)
{
struct ibv_modify_srq cmd;
struct ibv_srq_attr attr = {};
int ret;
srq->armed = 0;
ret = ibv_cmd_modify_srq(&srq->ibv_srq, &attr, 0, &cmd, sizeof(cmd));
if (ret)
fprintf(stderr,
"Failure to send srq_limit event - ret %d errno %d\n",
ret, errno);
}
/*
* Get one cq entry from c4iw and map it to openib.
*
* Returns:
* 0 cqe returned
* -ENODATA EMPTY;
* -EAGAIN caller must try again
* any other -errno fatal error
*/
static int c4iw_poll_cq_one(struct c4iw_cq *chp, struct ibv_wc *wc)
{
struct c4iw_qp *qhp = NULL;
struct c4iw_srq *srq = NULL;
struct t4_cqe_common *com;
union t4_cqe uninitialized_var(cqe), *rd_cqe;
struct t4_wq *wq;
u32 credit = 0;
u8 cqe_flushed;
u64 cookie = 0;
int ret;
ret = t4_next_cqe(&chp->cq, &rd_cqe);
if (ret) {
#ifdef STALL_DETECTION
if (ret == -ENODATA && stall_to && !chp->dumped) {
struct timeval t;
gettimeofday(&t, NULL);
if ((t.tv_sec - chp->time.tv_sec) > stall_to) {
dump_state();
chp->dumped = 1;
}
}
#endif
return ret;
}
#ifdef STALL_DETECTION
gettimeofday(&chp->time, NULL);
#endif
qhp = get_qhp(chp->rhp, CQE_QPID(&rd_cqe->com));
if (!qhp)
wq = NULL;
else {
pthread_spin_lock(&qhp->lock);
wq = &(qhp->wq);
srq = qhp->srq;
if (srq)
pthread_spin_lock(&srq->lock);
}
ret = poll_cq(wq, &(chp->cq), &cqe, &cqe_flushed, &cookie, &credit,
srq ? &srq->wq : NULL);
if (ret)
goto out;
com = &cqe.com;
INC_STAT(cqe);
wc->wr_id = cookie;
wc->qp_num = qhp->wq.sq.qid;
wc->vendor_err = CQE_STATUS(com);
wc->wc_flags = 0;
/*
* Simulate a SRQ_LIMIT_REACHED HW notification if required.
*/
if (srq && !(srq->flags & T4_SRQ_LIMIT_SUPPORT) && srq->armed &&
srq->wq.in_use < srq->srq_limit)
generate_srq_limit_event(srq);
PDBG("%s qpid 0x%x type %d opcode %d status 0x%x wrid hi 0x%x "
"lo 0x%x cookie 0x%llx\n", __func__,
CQE_QPID(com), CQE_TYPE(com),
CQE_OPCODE(com), CQE_STATUS(com), CQE_WRID_HI(com),
CQE_WRID_LOW(com), (unsigned long long)cookie);
if (CQE_TYPE(com) == 0) {
if (!CQE_STATUS(com))
wc->byte_len = CQE_LEN(com);
else
wc->byte_len = 0;
switch (CQE_OPCODE(com)) {
case FW_RI_SEND:
wc->opcode = IBV_WC_RECV;
break;
case FW_RI_SEND_WITH_INV:
case FW_RI_SEND_WITH_SE_INV:
wc->opcode = IBV_WC_RECV;
wc->wc_flags |= IBV_WC_WITH_INV;
wc->invalidated_rkey = CQE_WRID_STAG(com);
break;
case FW_RI_WRITE_IMMEDIATE:
wc->opcode = IBV_WC_RECV_RDMA_WITH_IMM;
wc->imm_data = CQE_IMM_DATA(&cqe.b64);
wc->wc_flags |= IBV_WC_WITH_IMM;
break;
default:
PDBG("Unexpected opcode %d in the CQE received for QPID=0x%0x\n",
CQE_OPCODE(com), CQE_QPID(com));
ret = -EINVAL;
goto out;
}
} else {
switch (CQE_OPCODE(com)) {
case FW_RI_RDMA_WRITE:
case FW_RI_WRITE_IMMEDIATE:
wc->opcode = IBV_WC_RDMA_WRITE;
break;
case FW_RI_READ_REQ:
wc->opcode = IBV_WC_RDMA_READ;
wc->byte_len = CQE_LEN(com);
break;
case FW_RI_SEND:
case FW_RI_SEND_WITH_SE:
wc->opcode = IBV_WC_SEND;
break;
case FW_RI_SEND_WITH_INV:
case FW_RI_SEND_WITH_SE_INV:
wc->wc_flags |= IBV_WC_WITH_INV;
wc->opcode = IBV_WC_SEND;
break;
case FW_RI_BIND_MW:
wc->opcode = IBV_WC_BIND_MW;
break;
default:
PDBG("Unexpected opcode %d "
"in the CQE received for QPID=0x%0x\n",
CQE_OPCODE(com), CQE_QPID(com));
ret = -EINVAL;
goto out;
}
}
if (cqe_flushed)
wc->status = IBV_WC_WR_FLUSH_ERR;
else {
switch (CQE_STATUS(com)) {
case T4_ERR_SUCCESS:
wc->status = IBV_WC_SUCCESS;
break;
case T4_ERR_STAG:
wc->status = IBV_WC_LOC_ACCESS_ERR;
break;
case T4_ERR_PDID:
wc->status = IBV_WC_LOC_PROT_ERR;
break;
case T4_ERR_QPID:
case T4_ERR_ACCESS:
wc->status = IBV_WC_LOC_ACCESS_ERR;
break;
case T4_ERR_WRAP:
wc->status = IBV_WC_GENERAL_ERR;
break;
case T4_ERR_BOUND:
wc->status = IBV_WC_LOC_LEN_ERR;
break;
case T4_ERR_INVALIDATE_SHARED_MR:
case T4_ERR_INVALIDATE_MR_WITH_MW_BOUND:
wc->status = IBV_WC_MW_BIND_ERR;
break;
case T4_ERR_CRC:
case T4_ERR_MARKER:
case T4_ERR_PDU_LEN_ERR:
case T4_ERR_OUT_OF_RQE:
case T4_ERR_DDP_VERSION:
case T4_ERR_RDMA_VERSION:
case T4_ERR_DDP_QUEUE_NUM:
case T4_ERR_MSN:
case T4_ERR_TBIT:
case T4_ERR_MO:
case T4_ERR_MSN_RANGE:
case T4_ERR_IRD_OVERFLOW:
case T4_ERR_OPCODE:
case T4_ERR_INTERNAL_ERR:
wc->status = IBV_WC_FATAL_ERR;
break;
case T4_ERR_SWFLUSH:
wc->status = IBV_WC_WR_FLUSH_ERR;
break;
default:
PDBG("Unexpected cqe_status 0x%x for QPID=0x%0x\n",
CQE_STATUS(com), CQE_QPID(com));
wc->status = IBV_WC_FATAL_ERR;
}
}
if (wc->status && wc->status != IBV_WC_WR_FLUSH_ERR)
syslog(LOG_NOTICE, "cxgb4 app err cqid %u qpid %u "
"type %u opcode %u status 0x%x\n",
chp->cq.cqid, CQE_QPID(com), CQE_TYPE(com),
CQE_OPCODE(com), CQE_STATUS(com));
out:
if (wq) {
pthread_spin_unlock(&qhp->lock);
if (srq)
pthread_spin_unlock(&srq->lock);
}
return ret;
}
int c4iw_poll_cq(struct ibv_cq *ibcq, int num_entries, struct ibv_wc *wc)
{
struct c4iw_cq *chp;
int npolled;
int err = 0;
chp = to_c4iw_cq(ibcq);
if (t4_cq_in_error(&chp->cq)) {
t4_reset_cq_in_error(&chp->cq);
c4iw_flush_qps(chp->rhp);
}
if (!num_entries)
return t4_cq_notempty(&chp->cq);
pthread_spin_lock(&chp->lock);
for (npolled = 0; npolled < num_entries; ++npolled) {
do {
err = c4iw_poll_cq_one(chp, wc + npolled);
} while (err == -EAGAIN);
if (err)
break;
}
pthread_spin_unlock(&chp->lock);
return !err || err == -ENODATA ? npolled : err;
}
int c4iw_arm_cq(struct ibv_cq *ibcq, int solicited)
{
struct c4iw_cq *chp;
int ret;
INC_STAT(arm);
chp = to_c4iw_cq(ibcq);
pthread_spin_lock(&chp->lock);
ret = t4_arm_cq(&chp->cq, solicited);
pthread_spin_unlock(&chp->lock);
return ret;
}
void c4iw_flush_srqidx(struct c4iw_qp *qhp, u32 srqidx)
{
struct c4iw_cq *rchp = to_c4iw_cq(qhp->ibv_qp.recv_cq);
/* create a SRQ RECV CQE for srqidx */
insert_recv_cqe(&qhp->wq, &rchp->cq, srqidx);
}