net: thunderx: Support to configure queue sizes from ethtool
Adds support to set Rx/Tx queue sizes from ethtool. Fixes
an issue with retrieving queue size. Also sets SQ's CQ_LIMIT
based on configured Tx queue size such that HW doesn't process
SQEs when there is no sufficient space in CQ.
Signed-off-by: Sunil Goutham <sgoutham@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_queues.c b/drivers/net/ethernet/cavium/thunder/nicvf_queues.c
index d2ac133..ac0390b 100644
--- a/drivers/net/ethernet/cavium/thunder/nicvf_queues.c
+++ b/drivers/net/ethernet/cavium/thunder/nicvf_queues.c
@@ -603,7 +603,7 @@ void nicvf_cmp_queue_config(struct nicvf *nic, struct queue_set *qs,
cq_cfg.ena = 1;
cq_cfg.reset = 0;
cq_cfg.caching = 0;
- cq_cfg.qsize = CMP_QSIZE;
+ cq_cfg.qsize = ilog2(qs->cq_len >> 10);
cq_cfg.avg_con = 0;
nicvf_queue_reg_write(nic, NIC_QSET_CQ_0_7_CFG, qidx, *(u64 *)&cq_cfg);
@@ -652,9 +652,12 @@ static void nicvf_snd_queue_config(struct nicvf *nic, struct queue_set *qs,
sq_cfg.ena = 1;
sq_cfg.reset = 0;
sq_cfg.ldwb = 0;
- sq_cfg.qsize = SND_QSIZE;
+ sq_cfg.qsize = ilog2(qs->sq_len >> 10);
sq_cfg.tstmp_bgx_intf = 0;
- sq_cfg.cq_limit = 0;
+ /* CQ's level at which HW will stop processing SQEs to avoid
+ * transmitting a pkt with no space in CQ to post CQE_TX.
+ */
+ sq_cfg.cq_limit = (CMP_QUEUE_PIPELINE_RSVD * 256) / qs->cq_len;
nicvf_queue_reg_write(nic, NIC_QSET_SQ_0_7_CFG, qidx, *(u64 *)&sq_cfg);
/* Set threshold value for interrupt generation */
@@ -816,11 +819,21 @@ int nicvf_config_data_transfer(struct nicvf *nic, bool enable)
{
bool disable = false;
struct queue_set *qs = nic->qs;
+ struct queue_set *pqs = nic->pnicvf->qs;
int qidx;
if (!qs)
return 0;
+ /* Take primary VF's queue lengths.
+ * This is needed to take queue lengths set from ethtool
+ * into consideration.
+ */
+ if (nic->sqs_mode && pqs) {
+ qs->cq_len = pqs->cq_len;
+ qs->sq_len = pqs->sq_len;
+ }
+
if (enable) {
if (nicvf_alloc_resources(nic))
return -ENOMEM;