enic: Use receive queue buffer blocks of 32/64 entries

Change the receive queue buffer allocations into blocks of 32 entries when
ring size is less than 64, otherwise use 64 entries per block.

Signed-off-by: Scott Feldman <scofeldm@cisco.com>
Signed-off-by: Vasanthy Kolluri <vkolluri@cisco.com>
Signed-off-by: Roopa Prabhu <roprabhu@cisco.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 9 insertions, 5 deletions

diff --git a/drivers/net/enic/vnic_rq.h b/drivers/net/enic/vnic_rq.h
index 35e736cc2d88..8f0fb78f0cdf 100644
--- a/drivers/net/enic/vnic_rq.h
+++ b/drivers/net/enic/vnic_rq.h
@@ -52,12 +52,16 @@ struct vnic_rq_ctrl {
         u32 pad10;
 };
 
-/* Break the vnic_rq_buf allocations into blocks of 64 entries */
-#define VNIC_RQ_BUF_BLK_ENTRIES 64
-#define VNIC_RQ_BUF_BLK_SZ \
-        (VNIC_RQ_BUF_BLK_ENTRIES * sizeof(struct vnic_rq_buf))
+/* Break the vnic_rq_buf allocations into blocks of 32/64 entries */
+#define VNIC_RQ_BUF_MIN_BLK_ENTRIES 32
+#define VNIC_RQ_BUF_DFLT_BLK_ENTRIES 64
+#define VNIC_RQ_BUF_BLK_ENTRIES(entries) \
+        ((unsigned int)((entries < VNIC_RQ_BUF_DFLT_BLK_ENTRIES) ? \
+        VNIC_RQ_BUF_MIN_BLK_ENTRIES : VNIC_RQ_BUF_DFLT_BLK_ENTRIES))
+#define VNIC_RQ_BUF_BLK_SZ(entries) \
+        (VNIC_RQ_BUF_BLK_ENTRIES(entries) * sizeof(struct vnic_rq_buf))
 #define VNIC_RQ_BUF_BLKS_NEEDED(entries) \
-        DIV_ROUND_UP(entries, VNIC_RQ_BUF_BLK_ENTRIES)
+        DIV_ROUND_UP(entries, VNIC_RQ_BUF_BLK_ENTRIES(entries))
 #define VNIC_RQ_BUF_BLKS_MAX VNIC_RQ_BUF_BLKS_NEEDED(4096)
 
 struct vnic_rq_buf {