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Date: Tue, 18 Aug 2020 12:44:07 -0700
From: David Awogbemila <awogbemila@...gle.com>
To: netdev@...r.kernel.org
Cc: David Awogbemila <awogbemila@...gle.com>,
Yangchun Fu <yangchun@...gle.com>
Subject: [PATCH net-next 08/18] gve: Enable Link Speed Reporting in the driver.
This change allows the driver to report the device link speed
when the ethtool command:
ethtool <nic name>
is run.
Getting the link speed is done via a new admin queue command:
ReportLinkSpeed.
Reviewed-by: Yangchun Fu <yangchun@...gle.com>
Signed-off-by: David Awogbemila <awogbemila@...gle.com>
---
drivers/net/ethernet/google/gve/gve.h | 3 +++
drivers/net/ethernet/google/gve/gve_adminq.c | 27 +++++++++++++++++++
drivers/net/ethernet/google/gve/gve_adminq.h | 9 +++++++
drivers/net/ethernet/google/gve/gve_ethtool.c | 11 ++++++++
4 files changed, 50 insertions(+)
diff --git a/drivers/net/ethernet/google/gve/gve.h b/drivers/net/ethernet/google/gve/gve.h
index bc54059f9b2e..0f5871af36af 100644
--- a/drivers/net/ethernet/google/gve/gve.h
+++ b/drivers/net/ethernet/google/gve/gve.h
@@ -252,6 +252,9 @@ struct gve_priv {
unsigned long service_timer_period;
struct timer_list service_timer;
+ /* Gvnic device link speed from hypervisor. */
+ u64 link_speed;
+
/* Gvnic device's dma mask, set during probe. */
u8 dma_mask;
};
diff --git a/drivers/net/ethernet/google/gve/gve_adminq.c b/drivers/net/ethernet/google/gve/gve_adminq.c
index 023e6f804972..cf5eaab1cb83 100644
--- a/drivers/net/ethernet/google/gve/gve_adminq.c
+++ b/drivers/net/ethernet/google/gve/gve_adminq.c
@@ -596,3 +596,30 @@ int gve_adminq_report_stats(struct gve_priv *priv, u64 stats_report_len,
return gve_adminq_execute_cmd(priv, &cmd);
}
+int gve_adminq_report_link_speed(struct gve_priv *priv)
+{
+ union gve_adminq_command gvnic_cmd;
+ dma_addr_t link_speed_region_bus;
+ u64 *link_speed_region;
+ int err;
+
+ link_speed_region =
+ dma_alloc_coherent(&priv->pdev->dev, sizeof(*link_speed_region),
+ &link_speed_region_bus, GFP_KERNEL);
+
+ if (!link_speed_region)
+ return -ENOMEM;
+
+ memset(&gvnic_cmd, 0, sizeof(gvnic_cmd));
+ gvnic_cmd.opcode = cpu_to_be32(GVE_ADMINQ_REPORT_LINK_SPEED);
+ gvnic_cmd.report_link_speed.link_speed_address =
+ cpu_to_be64(link_speed_region_bus);
+
+ err = gve_adminq_execute_cmd(priv, &gvnic_cmd);
+
+ priv->link_speed = be64_to_cpu(*link_speed_region);
+ dma_free_coherent(&priv->pdev->dev, sizeof(*link_speed_region), link_speed_region,
+ link_speed_region_bus);
+ return err;
+}
+
diff --git a/drivers/net/ethernet/google/gve/gve_adminq.h b/drivers/net/ethernet/google/gve/gve_adminq.h
index 784830f75b7c..281de8326bc5 100644
--- a/drivers/net/ethernet/google/gve/gve_adminq.h
+++ b/drivers/net/ethernet/google/gve/gve_adminq.h
@@ -22,6 +22,7 @@ enum gve_adminq_opcodes {
GVE_ADMINQ_DECONFIGURE_DEVICE_RESOURCES = 0x9,
GVE_ADMINQ_SET_DRIVER_PARAMETER = 0xB,
GVE_ADMINQ_REPORT_STATS = 0xC,
+ GVE_ADMINQ_REPORT_LINK_SPEED = 0xD
};
/* Admin queue status codes */
@@ -181,6 +182,12 @@ struct gve_adminq_report_stats {
static_assert(sizeof(struct gve_adminq_report_stats) == 24);
+struct gve_adminq_report_link_speed {
+ __be64 link_speed_address;
+};
+
+static_assert(sizeof(struct gve_adminq_report_link_speed) == 8);
+
struct stats {
__be32 stat_name;
__be32 queue_id;
@@ -228,6 +235,7 @@ union gve_adminq_command {
struct gve_adminq_unregister_page_list unreg_page_list;
struct gve_adminq_set_driver_parameter set_driver_param;
struct gve_adminq_report_stats report_stats;
+ struct gve_adminq_report_link_speed report_link_speed;
};
};
u8 reserved[64];
@@ -255,4 +263,5 @@ int gve_adminq_unregister_page_list(struct gve_priv *priv, u32 page_list_id);
int gve_adminq_set_mtu(struct gve_priv *priv, u64 mtu);
int gve_adminq_report_stats(struct gve_priv *priv, u64 stats_report_len,
dma_addr_t stats_report_addr, u64 interval);
+int gve_adminq_report_link_speed(struct gve_priv *priv);
#endif /* _GVE_ADMINQ_H */
diff --git a/drivers/net/ethernet/google/gve/gve_ethtool.c b/drivers/net/ethernet/google/gve/gve_ethtool.c
index 9d778e04b9f4..8bc8383558d8 100644
--- a/drivers/net/ethernet/google/gve/gve_ethtool.c
+++ b/drivers/net/ethernet/google/gve/gve_ethtool.c
@@ -509,6 +509,16 @@ static int gve_set_priv_flags(struct net_device *netdev, u32 flags)
return 0;
}
+static int gve_get_link_ksettings(struct net_device *netdev,
+ struct ethtool_link_ksettings *cmd)
+{
+ struct gve_priv *priv = netdev_priv(netdev);
+ int err = gve_adminq_report_link_speed(priv);
+
+ cmd->base.speed = priv->link_speed;
+ return err;
+}
+
const struct ethtool_ops gve_ethtool_ops = {
.get_drvinfo = gve_get_drvinfo,
.get_strings = gve_get_strings,
@@ -525,4 +535,5 @@ const struct ethtool_ops gve_ethtool_ops = {
.set_tunable = gve_set_tunable,
.get_priv_flags = gve_get_priv_flags,
.set_priv_flags = gve_set_priv_flags,
+ .get_link_ksettings = gve_get_link_ksettings
};
--
2.28.0.220.ged08abb693-goog
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