From: Tom Barbette Date: Thu, 2 May 2019 12:11:34 +0000 (+0200) Subject: net/mlx5: support reading clock X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=e571ad5541457e5741d84babb7d2301f2cd18c2f;p=dpdk.git net/mlx5: support reading clock Implements support for read_clock for the mlx5 driver. mlx5 supports hardware timestamp offload, setting packets timestamp field to the device clock. rte_eth_read_clock allows to read the device's current clock value and therefore compare values on similar time base. See rxtx_callbacks for an example. Signed-off-by: Tom Barbette Acked-by: Shahaf Shuler --- diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c index daadf4a7a7..aee9f97197 100644 --- a/drivers/net/mlx5/mlx5.c +++ b/drivers/net/mlx5/mlx5.c @@ -773,6 +773,7 @@ const struct eth_dev_ops mlx5_dev_ops = { .xstats_get_names = mlx5_xstats_get_names, .fw_version_get = mlx5_fw_version_get, .dev_infos_get = mlx5_dev_infos_get, + .read_clock = mlx5_read_clock, .dev_supported_ptypes_get = mlx5_dev_supported_ptypes_get, .vlan_filter_set = mlx5_vlan_filter_set, .rx_queue_setup = mlx5_rx_queue_setup, diff --git a/drivers/net/mlx5/mlx5.h b/drivers/net/mlx5/mlx5.h index 21b445a402..caabdfc451 100644 --- a/drivers/net/mlx5/mlx5.h +++ b/drivers/net/mlx5/mlx5.h @@ -404,6 +404,7 @@ int mlx5_set_flags(struct rte_eth_dev *dev, unsigned int keep, unsigned int flags); int mlx5_dev_configure(struct rte_eth_dev *dev); void mlx5_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *info); +int mlx5_read_clock(struct rte_eth_dev *dev, uint64_t *clock); int mlx5_fw_version_get(struct rte_eth_dev *dev, char *fw_ver, size_t fw_size); const uint32_t *mlx5_dev_supported_ptypes_get(struct rte_eth_dev *dev); int mlx5_link_update(struct rte_eth_dev *dev, int wait_to_complete); diff --git a/drivers/net/mlx5/mlx5_ethdev.c b/drivers/net/mlx5/mlx5_ethdev.c index a8a7eceda9..778534124b 100644 --- a/drivers/net/mlx5/mlx5_ethdev.c +++ b/drivers/net/mlx5/mlx5_ethdev.c @@ -568,6 +568,36 @@ mlx5_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *info) } } +/** + * Get device current raw clock counter + * + * @param dev + * Pointer to Ethernet device structure. + * @param[out] time + * Current raw clock counter of the device. + * + * @return + * 0 if the clock has correctly been read + * The value of errno in case of error + */ +int +mlx5_read_clock(struct rte_eth_dev *dev, uint64_t *clock) +{ + struct mlx5_priv *priv = dev->data->dev_private; + struct ibv_context *ctx = priv->sh->ctx; + struct ibv_values_ex values; + int err = 0; + + values.comp_mask = IBV_VALUES_MASK_RAW_CLOCK; + err = mlx5_glue->query_rt_values_ex(ctx, &values); + if (err != 0) { + DRV_LOG(WARNING, "Could not query the clock !"); + return err; + } + *clock = values.raw_clock.tv_nsec; + return 0; +} + /** * Get firmware version of a device. * diff --git a/drivers/net/mlx5/mlx5_glue.c b/drivers/net/mlx5/mlx5_glue.c index 21cd3bb5c0..d03837318a 100644 --- a/drivers/net/mlx5/mlx5_glue.c +++ b/drivers/net/mlx5/mlx5_glue.c @@ -87,6 +87,13 @@ mlx5_glue_query_device_ex(struct ibv_context *context, return ibv_query_device_ex(context, input, attr); } +static int +mlx5_glue_query_rt_values_ex(struct ibv_context *context, + struct ibv_values_ex *values) +{ + return ibv_query_rt_values_ex(context, values); +} + static int mlx5_glue_query_port(struct ibv_context *context, uint8_t port_num, struct ibv_port_attr *port_attr) @@ -854,6 +861,7 @@ const struct mlx5_glue *mlx5_glue = &(const struct mlx5_glue){ .close_device = mlx5_glue_close_device, .query_device = mlx5_glue_query_device, .query_device_ex = mlx5_glue_query_device_ex, + .query_rt_values_ex = mlx5_glue_query_rt_values_ex, .query_port = mlx5_glue_query_port, .create_comp_channel = mlx5_glue_create_comp_channel, .destroy_comp_channel = mlx5_glue_destroy_comp_channel, diff --git a/drivers/net/mlx5/mlx5_glue.h b/drivers/net/mlx5/mlx5_glue.h index b5c63cb873..433c9ed130 100644 --- a/drivers/net/mlx5/mlx5_glue.h +++ b/drivers/net/mlx5/mlx5_glue.h @@ -83,6 +83,8 @@ struct mlx5_glue { int (*query_device_ex)(struct ibv_context *context, const struct ibv_query_device_ex_input *input, struct ibv_device_attr_ex *attr); + int (*query_rt_values_ex)(struct ibv_context *context, + struct ibv_values_ex *values); int (*query_port)(struct ibv_context *context, uint8_t port_num, struct ibv_port_attr *port_attr); struct ibv_comp_channel *(*create_comp_channel)