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bnxt_en: Do not use the CNP CoS queue for networking traffic.

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The CNP CoS queue is reserved for internal RDMA Congestion Notification
Packets (CNP) and should not be used for a TC.  Modify the CoS queue
discovery code to skip over the CNP CoS queue and to reduce
bp->max_tc accordingly.  However, if RDMA is disabled in NVRAM, the
the CNP CoS queue can be used for a TC.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michael Chan 2018-08-05 16:51:58 -04:00 committed by David S. Miller
parent afdc8a8484
commit aabfc016e9
2 changed files with 18 additions and 8 deletions
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22
drivers/net/ethernet/broadcom/bnxt/bnxt.c
View File

@ -5281,7 +5281,8 @@ static int bnxt_hwrm_queue_qportcfg(struct bnxt *bp)
int rc = 0;
struct hwrm_queue_qportcfg_input req = {0};
struct hwrm_queue_qportcfg_output *resp = bp->hwrm_cmd_resp_addr;
u8 i, *qptr;
u8 i, j, *qptr;
bool no_rdma;
bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_QUEUE_QPORTCFG, -1, -1);
@ -5299,19 +5300,24 @@ static int bnxt_hwrm_queue_qportcfg(struct bnxt *bp)
if (bp->max_tc > BNXT_MAX_QUEUE)
bp->max_tc = BNXT_MAX_QUEUE;
no_rdma = !(bp->flags & BNXT_FLAG_ROCE_CAP);
qptr = &resp->queue_id0;
for (i = 0, j = 0; i < bp->max_tc; i++) {
bp->q_info[j].queue_id = *qptr++;
bp->q_info[j].queue_profile = *qptr++;
bp->tc_to_qidx[j] = j;
if (!BNXT_CNPQ(bp->q_info[j].queue_profile) ||
(no_rdma && BNXT_PF(bp)))
j++;
}
bp->max_tc = max_t(u8, j, 1);
if (resp->queue_cfg_info & QUEUE_QPORTCFG_RESP_QUEUE_CFG_INFO_ASYM_CFG)
bp->max_tc = 1;
if (bp->max_lltc > bp->max_tc)
bp->max_lltc = bp->max_tc;
qptr = &resp->queue_id0;
for (i = 0; i < bp->max_tc; i++) {
bp->q_info[i].queue_id = *qptr++;
bp->q_info[i].queue_profile = *qptr++;
bp->tc_to_qidx[i] = i;
}
qportcfg_exit:
mutex_unlock(&bp->hwrm_cmd_lock);
return rc;

4
drivers/net/ethernet/broadcom/bnxt/bnxt_dcb.h
View File

@ -43,6 +43,10 @@ struct bnxt_dscp2pri_entry {
((q_profile) == \
QUEUE_QPORTCFG_RESP_QUEUE_ID0_SERVICE_PROFILE_LOSSLESS_ROCE)
#define BNXT_CNPQ(q_profile) \
((q_profile) == \
QUEUE_QPORTCFG_RESP_QUEUE_ID0_SERVICE_PROFILE_LOSSY_ROCE_CNP)
#define HWRM_STRUCT_DATA_SUBTYPE_HOST_OPERATIONAL 0x0300
void bnxt_dcb_init(struct bnxt *bp);