From a5171594fc3b592e760436c36d649db44ff16197 Mon Sep 17 00:00:00 2001 From: Adrien Mazarguil Date: Thu, 12 Oct 2017 14:19:19 +0200 Subject: [PATCH] net/mlx4: expose support for flow rule priorities This PMD supports up to 4096 flow rule priority levels (0 to 4095). Applications were not allowed to use them until now due to overlaps with the default flows (e.g. MAC address, promiscuous mode). This is not an issue in isolated mode when such flows do not exist. Signed-off-by: Adrien Mazarguil Acked-by: Nelio Laranjeiro --- drivers/net/mlx4/mlx4_flow.c | 20 +++++++++++++++++--- drivers/net/mlx4/mlx4_flow.h | 3 +++ drivers/net/mlx4/mlx4_utils.h | 6 ++++++ 3 files changed, 26 insertions(+), 3 deletions(-) diff --git a/drivers/net/mlx4/mlx4_flow.c b/drivers/net/mlx4/mlx4_flow.c index 018843bda9..730249b9fa 100644 --- a/drivers/net/mlx4/mlx4_flow.c +++ b/drivers/net/mlx4/mlx4_flow.c @@ -597,8 +597,8 @@ mlx4_flow_prepare(struct priv *priv, .queue = 0, .drop = 0, }; + uint32_t priority_override = 0; - (void)priv; if (attr->group) { rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ATTR_GROUP, @@ -606,11 +606,22 @@ mlx4_flow_prepare(struct priv *priv, "groups are not supported"); return -rte_errno; } - if (attr->priority) { + if (priv->isolated) { + priority_override = attr->priority; + } else if (attr->priority) { rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ATTR_PRIORITY, NULL, - "priorities are not supported"); + "priorities are not supported outside" + " isolated mode"); + return -rte_errno; + } + if (attr->priority > MLX4_FLOW_PRIORITY_LAST) { + rte_flow_error_set(error, ENOTSUP, + RTE_FLOW_ERROR_TYPE_ATTR_PRIORITY, + NULL, + "maximum priority level is " + MLX4_STR_EXPAND(MLX4_FLOW_PRIORITY_LAST)); return -rte_errno; } if (attr->egress) { @@ -680,6 +691,9 @@ mlx4_flow_prepare(struct priv *priv, } flow->offset += cur_item->dst_sz; } + /* Use specified priority level when in isolated mode. */ + if (priv->isolated && flow->ibv_attr) + flow->ibv_attr->priority = priority_override; /* Go over actions list */ for (; actions->type != RTE_FLOW_ACTION_TYPE_END; ++actions) { if (actions->type == RTE_FLOW_ACTION_TYPE_VOID) { diff --git a/drivers/net/mlx4/mlx4_flow.h b/drivers/net/mlx4/mlx4_flow.h index 459030c60c..8ac09f1350 100644 --- a/drivers/net/mlx4/mlx4_flow.h +++ b/drivers/net/mlx4/mlx4_flow.h @@ -52,6 +52,9 @@ #include #include +/** Last and lowest priority level for a flow rule. */ +#define MLX4_FLOW_PRIORITY_LAST UINT32_C(0xfff) + /** PMD-specific (mlx4) definition of a flow rule handle. */ struct rte_flow { LIST_ENTRY(rte_flow) next; /**< Pointer to the next flow structure. */ diff --git a/drivers/net/mlx4/mlx4_utils.h b/drivers/net/mlx4/mlx4_utils.h index b9c02d59b1..13f731a0db 100644 --- a/drivers/net/mlx4/mlx4_utils.h +++ b/drivers/net/mlx4/mlx4_utils.h @@ -104,6 +104,12 @@ pmd_drv_log_basename(const char *s) \ snprintf(name, sizeof(name), __VA_ARGS__) +/** Generate a string out of the provided arguments. */ +#define MLX4_STR(...) # __VA_ARGS__ + +/** Similar to MLX4_STR() with enclosed macros expanded first. */ +#define MLX4_STR_EXPAND(...) MLX4_STR(__VA_ARGS__) + /* mlx4_utils.c */ int mlx4_fd_set_non_blocking(int fd); -- 2.20.1