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Commit 5a7b27eb authored by Maor Gottlieb's avatar Maor Gottlieb Committed by David S. Miller
Browse files

net/mlx5: Initializing CPU reverse mapping 



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: default avatarMaor Gottlieb <maorg@mellanox.com>
Signed-off-by: default avatarSaeed Mahameed <saeedm@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 33cfaaa8

drivers/net/ethernet/mellanox/mlx5/core/en_main.c

+3 −0
Original line number Diff line number Diff line
@@ -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);

drivers/net/ethernet/mellanox/mlx5/core/main.c

+18 −0
Original line number Diff line number Diff line
@@ -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,

include/linux/mlx5/driver.h

+3 −0
Original line number Diff line number Diff line
@@ -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 {