From: Arthur Kiyanovski Date: Mon, 16 Sep 2019 14:31:29 +0300 Subject: [PATCH] net: ena: enable the interrupt_moderation in driver_supported_features Origin: https://git.kernel.org/linus/bd21b0cc3a63d1c658b230db084b0f392b78cab2 Bug-Debian: https://bugs.debian.org/941291 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 Signed-off-by: David S. Miller --- drivers/net/ethernet/amazon/ena/ena_admin_defs.h | 8 ++++++++ drivers/net/ethernet/amazon/ena/ena_netdev.c | 3 +++ 2 files changed, 11 insertions(+) Index: linux/drivers/net/ethernet/amazon/ena/ena_admin_defs.h =================================================================== --- linux.orig/drivers/net/ethernet/amazon/ena/ena_admin_defs.h +++ linux/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_ #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) Index: linux/drivers/net/ethernet/amazon/ena/ena_netdev.c =================================================================== --- linux.orig/drivers/net/ethernet/amazon/ena/ena_netdev.c +++ linux/drivers/net/ethernet/amazon/ena/ena_netdev.c @@ -2440,6 +2440,9 @@ static void ena_config_host_info(struct ("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)