netdev - [PATCH V2 net-next 04/11] net: ena: enable the interrupt_moderation in driver_supported

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Message-ID: <1568633496-4143-5-git-send-email-akiyano@amazon.com>
Date:   Mon, 16 Sep 2019 14:31:29 +0300
From:   <akiyano@...zon.com>
To:     <davem@...emloft.net>, <netdev@...r.kernel.org>
CC:     Arthur Kiyanovski <akiyano@...zon.com>, <dwmw@...zon.com>,
        <zorik@...zon.com>, <matua@...zon.com>, <saeedb@...zon.com>,
        <msw@...zon.com>, <aliguori@...zon.com>, <nafea@...zon.com>,
        <gtzalik@...zon.com>, <netanel@...zon.com>, <alisaidi@...zon.com>,
        <benh@...zon.com>, <sameehj@...zon.com>, <ndagan@...zon.com>
Subject: [PATCH V2 net-next 04/11] net: ena: enable the interrupt_moderation in driver_supported_features

From: Arthur Kiyanovski <akiyano@...zon.com>

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@...zon.com>
---
 drivers/net/ethernet/amazon/ena/ena_admin_defs.h | 8 ++++++++
 drivers/net/ethernet/amazon/ena/ena_netdev.c     | 3 +++
 2 files changed, 11 insertions(+)

diff --git a/drivers/net/ethernet/amazon/ena/ena_admin_defs.h b/drivers/net/ethernet/amazon/ena/ena_admin_defs.h
index d19f2ecf8e84..8baf847e8622 100644
--- 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 cdcc169b87fa..f19736493c01 100644
--- 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)
-- 
2.17.2