system/linux
system/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux synced 2024-09-30 00:10:51 +00:00
Code Issues Packages Projects Releases Wiki Activity

bnxt_en: Remap TC to hardware queues when configuring PFC.

Browse source 
Initially, the MQPRIO TCs are mapped 1:1 directly to the hardware
queues.  Some of these hardware queues are configured to be lossless.
When PFC is enabled on one of more TCs, we now need to remap the
TCs that have PFC enabled to the lossless hardware queues.

After remapping, we need to close and open the NIC for the new
mapping to take effect.  We also need to reprogram all ETS parameters.

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 2018-04-26 17:44:32 -04:00 committed by David S. Miller
parent 2e8ef77ee0
commit d31cd579a4
1 changed files with 62 additions and 43 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

105
drivers/net/ethernet/broadcom/bnxt/bnxt_dcb.c
View file

@ -173,44 +173,59 @@ static int bnxt_hwrm_queue_cos2bw_qcfg(struct bnxt *bp, struct ieee_ets *ets)
return 0;
}
static int bnxt_hwrm_queue_cfg(struct bnxt *bp, unsigned int lltc_mask)
static int bnxt_queue_remap(struct bnxt *bp, unsigned int lltc_mask)
{
struct hwrm_queue_cfg_input req = {0};
int i;
unsigned long qmap = 0;
int max = bp->max_tc;
int i, j, rc;
if (netif_running(bp->dev))
bnxt_tx_disable(bp);
bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_QUEUE_CFG, -1, -1);
req.flags = cpu_to_le32(QUEUE_CFG_REQ_FLAGS_PATH_BIDIR);
req.enables = cpu_to_le32(QUEUE_CFG_REQ_ENABLES_SERVICE_PROFILE);
/* Configure lossless queues to lossy first */
req.service_profile = QUEUE_CFG_REQ_SERVICE_PROFILE_LOSSY;
for (i = 0; i < bp->max_tc; i++) {
if (BNXT_LLQ(bp->q_info[i].queue_profile)) {
req.queue_id = cpu_to_le32(bp->q_info[i].queue_id);
hwrm_send_message(bp, &req, sizeof(req),
HWRM_CMD_TIMEOUT);
bp->q_info[i].queue_profile =
QUEUE_CFG_REQ_SERVICE_PROFILE_LOSSY;
}
}
/* Now configure desired queues to lossless */
req.service_profile = QUEUE_CFG_REQ_SERVICE_PROFILE_LOSSLESS;
for (i = 0; i < bp->max_tc; i++) {
/* Assign lossless TCs first */
for (i = 0, j = 0; i < max; ) {
if (lltc_mask & (1 << i)) {
req.queue_id = cpu_to_le32(bp->q_info[i].queue_id);
hwrm_send_message(bp, &req, sizeof(req),
HWRM_CMD_TIMEOUT);
bp->q_info[i].queue_profile =
QUEUE_CFG_REQ_SERVICE_PROFILE_LOSSLESS;
if (BNXT_LLQ(bp->q_info[j].queue_profile)) {
bp->tc_to_qidx[i] = j;
__set_bit(j, &qmap);
i++;
}
j++;
continue;
}
i++;
}
for (i = 0, j = 0; i < max; i++) {
if (lltc_mask & (1 << i))
continue;
j = find_next_zero_bit(&qmap, max, j);
bp->tc_to_qidx[i] = j;
__set_bit(j, &qmap);
j++;
}
if (netif_running(bp->dev)) {
bnxt_close_nic(bp, false, false);
rc = bnxt_open_nic(bp, false, false);
if (rc) {
netdev_warn(bp->dev, "failed to open NIC, rc = %d\n", rc);
return rc;
}
}
if (netif_running(bp->dev))
bnxt_tx_enable(bp);
if (bp->ieee_ets) {
int tc = netdev_get_num_tc(bp->dev);
if (!tc)
tc = 1;
rc = bnxt_hwrm_queue_cos2bw_cfg(bp, bp->ieee_ets, tc);
if (rc) {
netdev_warn(bp->dev, "failed to config BW, rc = %d\n", rc);
return rc;
}
rc = bnxt_hwrm_queue_pri2cos_cfg(bp, bp->ieee_ets);
if (rc) {
netdev_warn(bp->dev, "failed to config prio, rc = %d\n", rc);
return rc;
}
}
return 0;
}
@ -220,7 +235,7 @@ static int bnxt_hwrm_queue_pfc_cfg(struct bnxt *bp, struct ieee_pfc *pfc)
struct ieee_ets *my_ets = bp->ieee_ets;
unsigned int tc_mask = 0, pri_mask = 0;
u8 i, pri, lltc_count = 0;
bool need_q_recfg = false;
bool need_q_remap = false;
int rc;
if (!my_ets)
@ -240,22 +255,26 @@ static int bnxt_hwrm_queue_pfc_cfg(struct bnxt *bp, struct ieee_pfc *pfc)
if (lltc_count > bp->max_lltc)
return -EINVAL;
for (i = 0; i < bp->max_tc; i++) {
if (tc_mask & (1 << i)) {
u8 qidx = bp->tc_to_qidx[i];
if (!BNXT_LLQ(bp->q_info[qidx].queue_profile)) {
need_q_remap = true;
break;
}
}
}
if (need_q_remap)
rc = bnxt_queue_remap(bp, tc_mask);
bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_QUEUE_PFCENABLE_CFG, -1, -1);
req.flags = cpu_to_le32(pri_mask);
rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
if (rc)
return rc;
for (i = 0; i < bp->max_tc; i++) {
if (tc_mask & (1 << i)) {
if (!BNXT_LLQ(bp->q_info[i].queue_profile))
need_q_recfg = true;
}
}
if (need_q_recfg)
rc = bnxt_hwrm_queue_cfg(bp, tc_mask);
return rc;
}