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net/mlx5: Initializing CPU reverse mapping

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Allocating CPU rmap and add entry for each IRQ.
CPU rmap is used in aRFS to get the RX queue number
of the RX completion interrupts.

Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Maor Gottlieb 2016-04-29 01:36:39 +03:00 committed by David S. Miller
parent 33cfaaa8f3
commit 5a7b27eb9c
3 changed files with 24 additions and 0 deletions
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3
drivers/net/ethernet/mellanox/mlx5/core/en_main.c
View File

@ -1691,6 +1691,9 @@ int mlx5e_open_locked(struct net_device *netdev)
mlx5e_redirect_rqts(priv);
mlx5e_update_carrier(priv);
mlx5e_timestamp_init(priv);
#ifdef CONFIG_RFS_ACCEL
priv->netdev->rx_cpu_rmap = priv->mdev->rmap;
#endif
schedule_delayed_work(&priv->update_stats_work, 0);

18
drivers/net/ethernet/mellanox/mlx5/core/main.c
View File

@ -48,6 +48,9 @@
#include <linux/kmod.h>
#include <linux/delay.h>
#include <linux/mlx5/mlx5_ifc.h>
#ifdef CONFIG_RFS_ACCEL
#include <linux/cpu_rmap.h>
#endif
#include "mlx5_core.h"
#include "fs_core.h"
#ifdef CONFIG_MLX5_CORE_EN
@ -665,6 +668,12 @@ static void free_comp_eqs(struct mlx5_core_dev *dev)
struct mlx5_eq_table *table = &dev->priv.eq_table;
struct mlx5_eq *eq, *n;
#ifdef CONFIG_RFS_ACCEL
if (dev->rmap) {
free_irq_cpu_rmap(dev->rmap);
dev->rmap = NULL;
}
#endif
spin_lock(&table->lock);
list_for_each_entry_safe(eq, n, &table->comp_eqs_list, list) {
list_del(&eq->list);
@ -691,6 +700,11 @@ static int alloc_comp_eqs(struct mlx5_core_dev *dev)
INIT_LIST_HEAD(&table->comp_eqs_list);
ncomp_vec = table->num_comp_vectors;
nent = MLX5_COMP_EQ_SIZE;
#ifdef CONFIG_RFS_ACCEL
dev->rmap = alloc_irq_cpu_rmap(ncomp_vec);
if (!dev->rmap)
return -ENOMEM;
#endif
for (i = 0; i < ncomp_vec; i++) {
eq = kzalloc(sizeof(*eq), GFP_KERNEL);
if (!eq) {
@ -698,6 +712,10 @@ static int alloc_comp_eqs(struct mlx5_core_dev *dev)
goto clean;
}
#ifdef CONFIG_RFS_ACCEL
irq_cpu_rmap_add(dev->rmap,
dev->priv.msix_arr[i + MLX5_EQ_VEC_COMP_BASE].vector);
#endif
snprintf(name, MLX5_MAX_IRQ_NAME, "mlx5_comp%d", i);
err = mlx5_create_map_eq(dev, eq,
i + MLX5_EQ_VEC_COMP_BASE, nent, 0,

3
include/linux/mlx5/driver.h
View File

@ -560,6 +560,9 @@ struct mlx5_core_dev {
struct mlx5_profile *profile;
atomic_t num_qps;
u32 issi;
#ifdef CONFIG_RFS_ACCEL
struct cpu_rmap *rmap;
#endif
};
struct mlx5_db {