net: thunderx: Set CQ timer threshold properly

Properly set CQ timer threshold and also set it to 2us. With previous incorrect settings it was set to 0.5us which is too less. Signed-off-by: Sunil Goutham <sgoutham@cavium.com> Signed-off-by: David S. Miller <davem@davemloft.net>
git-mirror · Dec 2, 2015 · 006394a · 006394a
1 parent a7b1f53
commit 006394a
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Showing 3 changed files with 4 additions and 5 deletions.
diff --git a/drivers/net/ethernet/cavium/thunder/nic.h b/drivers/net/ethernet/cavium/thunder/nic.h
@@ -120,10 +120,9 @@
  * Calculated for SCLK of 700Mhz
  * value written should be a 1/16th of what is expected
  *
- * 1 tick per 0.05usec = value of 2.2
- * This 10% would be covered in CQ timer thresh value
+ * 1 tick per 0.025usec
  */
-#define NICPF_CLK_PER_INT_TICK		2
+#define NICPF_CLK_PER_INT_TICK		1
 
 /* Time to wait before we decide that a SQ is stuck.
  *

diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_queues.c b/drivers/net/ethernet/cavium/thunder/nicvf_queues.c
@@ -592,7 +592,7 @@ void nicvf_cmp_queue_config(struct nicvf *nic, struct queue_set *qs,
 	/* Set threshold value for interrupt generation */
 	nicvf_queue_reg_write(nic, NIC_QSET_CQ_0_7_THRESH, qidx, cq->thresh);
 	nicvf_queue_reg_write(nic, NIC_QSET_CQ_0_7_CFG2,
-			      qidx, nic->cq_coalesce_usecs);
+			      qidx, CMP_QUEUE_TIMER_THRESH);
 }
 
 /* Configures transmit queue */

diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_queues.h b/drivers/net/ethernet/cavium/thunder/nicvf_queues.h
@@ -76,7 +76,7 @@
 #define CMP_QSIZE		CMP_QUEUE_SIZE2
 #define CMP_QUEUE_LEN		(1ULL << (CMP_QSIZE + 10))
 #define CMP_QUEUE_CQE_THRESH	0
-#define CMP_QUEUE_TIMER_THRESH	220 /* 10usec */
+#define CMP_QUEUE_TIMER_THRESH	80 /* ~2usec */
 
 #define RBDR_SIZE		RBDR_SIZE0
 #define RCV_BUF_COUNT		(1ULL << (RBDR_SIZE + 13))