net: bcmgenet: Add support for adaptive RX coalescing
Unlike the moder modern SYSTEMPORT hardware, we do not have a
configurable TDMA timeout, which limits us to implement adaptive RX
interrupt coalescing only. We have each of our RX rings implement a
bcmgenet_net_dim structure which holds an interrupt counter, number of
packets, bytes, and a container for a net_dim instance.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.h b/drivers/net/ethernet/broadcom/genet/bcmgenet.h
index 3c50431..22c41e0 100644
--- a/drivers/net/ethernet/broadcom/genet/bcmgenet.h
+++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.h
@@ -16,6 +16,7 @@
#include <linux/mii.h>
#include <linux/if_vlan.h>
#include <linux/phy.h>
+#include <linux/net_dim.h>
/* total number of Buffer Descriptors, same for Rx/Tx */
#define TOTAL_DESC 256
@@ -572,6 +573,16 @@
struct bcmgenet_priv *priv;
};
+struct bcmgenet_net_dim {
+ u16 use_dim;
+ u16 event_ctr;
+ unsigned long packets;
+ unsigned long bytes;
+ u32 coal_usecs;
+ u32 coal_pkts;
+ struct net_dim dim;
+};
+
struct bcmgenet_rx_ring {
struct napi_struct napi; /* Rx NAPI struct */
unsigned long bytes;
@@ -586,6 +597,7 @@
unsigned int cb_ptr; /* Rx ring initial CB ptr */
unsigned int end_ptr; /* Rx ring end CB ptr */
unsigned int old_discards;
+ struct bcmgenet_net_dim dim;
void (*int_enable)(struct bcmgenet_rx_ring *);
void (*int_disable)(struct bcmgenet_rx_ring *);
struct bcmgenet_priv *priv;