net: ena: enable the interrupt_moderation in driver_supported_features

Add driver_supported_features to host_host info which is a new API used to
communicate to the device which features are supported by the driver.

Add the interrupt_moderation bit to host_info->driver_supported_features
and enable it to signal the device that this driver supports interrupt
moderation properly.

Reserved bits are for features implemented in the future

Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/amazon/ena/ena_admin_defs.h b/drivers/net/ethernet/amazon/ena/ena_admin_defs.h
index d19f2ec..8baf847 100644 (file)
--- a/drivers/net/ethernet/amazon/ena/ena_admin_defs.h
+++ b/drivers/net/ethernet/amazon/ena/ena_admin_defs.h
@@ -808,6 +808,12 @@ struct ena_admin_host_info {
        u16 num_cpus;
 
        u16 reserved;
+
+       /* 1 :0 : reserved
+        * 2 : interrupt_moderation
+        * 31:3 : reserved
+        */
+       u32 driver_supported_features;
 };
 
 struct ena_admin_rss_ind_table_entry {
@@ -1110,6 +1116,8 @@ struct ena_admin_ena_mmio_req_read_less_resp {
 #define ENA_ADMIN_HOST_INFO_DEVICE_MASK                     GENMASK(7, 3)
 #define ENA_ADMIN_HOST_INFO_BUS_SHIFT                       8
 #define ENA_ADMIN_HOST_INFO_BUS_MASK                        GENMASK(15, 8)
+#define ENA_ADMIN_HOST_INFO_INTERRUPT_MODERATION_SHIFT      2
+#define ENA_ADMIN_HOST_INFO_INTERRUPT_MODERATION_MASK       BIT(2)
 
 /* aenq_common_desc */
 #define ENA_ADMIN_AENQ_COMMON_DESC_PHASE_MASK               BIT(0)

diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index cdcc169..f197364 100644 (file)
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -2438,6 +2438,9 @@ static void ena_config_host_info(struct ena_com_dev *ena_dev,
                ("K"[0] << ENA_ADMIN_HOST_INFO_MODULE_TYPE_SHIFT);
        host_info->num_cpus = num_online_cpus();
 
+       host_info->driver_supported_features =
+               ENA_ADMIN_HOST_INFO_INTERRUPT_MODERATION_MASK;
+
        rc = ena_com_set_host_attributes(ena_dev);
        if (rc) {
                if (rc == -EOPNOTSUPP)