liquidio: Consider PTP for packet size calculations

This patch is to refactor packet size calculations to support PTP enabled
for 66xx and 68xx cards and also other cards that do not support PTP.

Signed-off-by: Derek Chickles <derek.chickles@caviumnetworks.com>
Signed-off-by: Satanand Burla <satananda.burla@caviumnetworks.com>
Signed-off-by: Felix Manlunas <felix.manlunas@caviumnetworks.com>
Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@caviumnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/cavium/liquidio/lio_main.c b/drivers/net/ethernet/cavium/liquidio/lio_main.c
index 3a4f31fb434cbfee888cada9b6141376cf06fb8e..aa28790d935e764c4ed20c4fb00682e6a91a1d38 100644 (file)
--- a/drivers/net/ethernet/cavium/liquidio/lio_main.c
+++ b/drivers/net/ethernet/cavium/liquidio/lio_main.c
@@ -84,6 +84,8 @@ static int conf_type;
 module_param(conf_type, int, 0);
 MODULE_PARM_DESC(conf_type, "select octeon configuration 0 default 1 ovs");
 
+static int ptp_enable = 1;
+
 /* Bit mask values for lio->ifstate */
 #define   LIO_IFSTATE_DROQ_OPS             0x01
 #define   LIO_IFSTATE_REGISTERED           0x02
@@ -1851,6 +1853,7 @@ liquidio_push_packet(u32 octeon_id,
        if (netdev) {
                int packet_was_received;
                struct lio *lio = GET_LIO(netdev);
+               struct octeon_device *oct = lio->oct_dev;
 
                /* Do not proceed if the interface is not in RUNNING state. */
                if (!ifstate_check(lio, LIO_IFSTATE_RUNNING)) {
@@ -1889,21 +1892,26 @@ liquidio_push_packet(u32 octeon_id,
                        put_page(pg_info->page);
                }
 
-               if (rh->r_dh.has_hwtstamp) {
-                       /* timestamp is included from the hardware at the
-                        * beginning of the packet.
-                        */
-                       if (ifstate_check(lio,
-                                         LIO_IFSTATE_RX_TIMESTAMP_ENABLED)) {
-                               /* Nanoseconds are in the first 64-bits
-                                * of the packet.
+               if (((oct->chip_id == OCTEON_CN66XX) ||
+                    (oct->chip_id == OCTEON_CN68XX)) &&
+                   ptp_enable) {
+                       if (rh->r_dh.has_hwtstamp) {
+                               /* timestamp is included from the hardware at
+                                * the beginning of the packet.
                                 */
-                               memcpy(&ns, (skb->data), sizeof(ns));
-                               shhwtstamps = skb_hwtstamps(skb);
-                               shhwtstamps->hwtstamp =
-                                       ns_to_ktime(ns + lio->ptp_adjust);
+                               if (ifstate_check
+                                   (lio, LIO_IFSTATE_RX_TIMESTAMP_ENABLED)) {
+                                       /* Nanoseconds are in the first 64-bits
+                                        * of the packet.
+                                        */
+                                       memcpy(&ns, (skb->data), sizeof(ns));
+                                       shhwtstamps = skb_hwtstamps(skb);
+                                       shhwtstamps->hwtstamp =
+                                               ns_to_ktime(ns +
+                                                           lio->ptp_adjust);
+                               }
+                               skb_pull(skb, sizeof(ns));
                        }
-                       skb_pull(skb, sizeof(ns));
                }
 
                skb->protocol = eth_type_trans(skb, skb->dev);

diff --git a/drivers/net/ethernet/cavium/liquidio/liquidio_common.h b/drivers/net/ethernet/cavium/liquidio/liquidio_common.h
index 00b3ef5661b56d73b1877dab6ba32ecbdc73dc40..84ffcae8466c25f8cdd86897303ee6940147c02b 100644 (file)
--- a/drivers/net/ethernet/cavium/liquidio/liquidio_common.h
+++ b/drivers/net/ethernet/cavium/liquidio/liquidio_common.h
@@ -174,9 +174,11 @@ static inline void add_sg_size(struct octeon_sg_entry *sg_entry,
 /*------------------------- End Scatter/Gather ---------------------------*/
 
 #define   OCTNET_FRM_PTP_HEADER_SIZE  8
-#define   OCTNET_FRM_HEADER_SIZE     30 /* PTP timestamp + VLAN + Ethernet */
 
-#define   OCTNET_MIN_FRM_SIZE        (64  + OCTNET_FRM_PTP_HEADER_SIZE)
+#define   OCTNET_FRM_HEADER_SIZE     22 /* VLAN + Ethernet */
+
+#define   OCTNET_MIN_FRM_SIZE        64
+
 #define   OCTNET_MAX_FRM_SIZE        (16000 + OCTNET_FRM_HEADER_SIZE)
 
 #define   OCTNET_DEFAULT_FRM_SIZE    (1500 + OCTNET_FRM_HEADER_SIZE)