Commit 4375130b authored by Tariq Toukan's avatar Tariq Toukan Committed by Saeed Mahameed
Browse files

net/mlx5: SD, Add debugfs 



Add debugfs entries that describe the Socket-Direct group.

Example:
$ grep -H . /sys/kernel/debug/mlx5/0000\:08\:00.0/multi-pf/*
/sys/kernel/debug/mlx5/0000:08:00.0/multi-pf/group_id:0x00000101
/sys/kernel/debug/mlx5/0000:08:00.0/multi-pf/primary:0000:08:00.0 vhca 0x0
/sys/kernel/debug/mlx5/0000:08:00.0/multi-pf/secondary_0:0000:09:00.0 vhca 0x2

Signed-off-by: default avatarTariq Toukan <tariqt@nvidia.com>
Signed-off-by: default avatarSaeed Mahameed <saeedm@nvidia.com>
parent ae40550e

drivers/net/ethernet/mellanox/mlx5/core/lib/sd.c

+34 −0
Original line number Diff line number Diff line
@@ -6,6 +6,7 @@ 
#include "lib/mlx5.h"

#include "fs_cmd.h"

#include <linux/mlx5/vport.h>

#include <linux/debugfs.h>



#define sd_info(__dev, format, ...) \

	dev_info((__dev)->device, "Socket-Direct: " format, ##__VA_ARGS__)
@@ -16,6 +17,7 @@ struct mlx5_sd { 
	u32 group_id;

	u8 host_buses;

	struct mlx5_devcom_comp_dev *devcom;

	struct dentry *dfs;

	bool primary;

	union {

		struct { /* primary */
@@ -391,6 +393,26 @@ static void sd_print_group(struct mlx5_core_dev *primary) 
			MLX5_CAP_GEN(pos, vhca_id));

}



static ssize_t dev_read(struct file *filp, char __user *buf, size_t count,

			loff_t *pos)

{

	struct mlx5_core_dev *dev;

	char tbuf[32];

	int ret;



	dev = filp->private_data;

	ret = snprintf(tbuf, sizeof(tbuf), "%s vhca %#x\n", pci_name(dev->pdev),

		       MLX5_CAP_GEN(dev, vhca_id));



	return simple_read_from_buffer(buf, count, pos, tbuf, ret);

}



static const struct file_operations dev_fops = {

	.owner	= THIS_MODULE,

	.open	= simple_open,

	.read	= dev_read,

};



int mlx5_sd_init(struct mlx5_core_dev *dev)

{

	struct mlx5_core_dev *primary, *pos, *to;
@@ -422,10 +444,20 @@ int mlx5_sd_init(struct mlx5_core_dev *dev) 
	if (err)

		goto err_sd_unregister;



	sd->dfs = debugfs_create_dir("multi-pf", mlx5_debugfs_get_dev_root(primary));

	debugfs_create_x32("group_id", 0400, sd->dfs, &sd->group_id);

	debugfs_create_file("primary", 0400, sd->dfs, primary, &dev_fops);



	mlx5_sd_for_each_secondary(i, primary, pos) {

		char name[32];



		err = sd_cmd_set_secondary(pos, primary, alias_key);

		if (err)

			goto err_unset_secondaries;



		snprintf(name, sizeof(name), "secondary_%d", i - 1);

		debugfs_create_file(name, 0400, sd->dfs, pos, &dev_fops);



	}



	sd_info(primary, "group id %#x, size %d, combined\n",
@@ -439,6 +471,7 @@ int mlx5_sd_init(struct mlx5_core_dev *dev) 
	mlx5_sd_for_each_secondary_to(i, primary, to, pos)

		sd_cmd_unset_secondary(pos);

	sd_cmd_unset_primary(primary);

	debugfs_remove_recursive(sd->dfs);

err_sd_unregister:

	sd_unregister(dev);

err_sd_cleanup:
@@ -462,6 +495,7 @@ void mlx5_sd_cleanup(struct mlx5_core_dev *dev) 
	mlx5_sd_for_each_secondary(i, primary, pos)

		sd_cmd_unset_secondary(pos);

	sd_cmd_unset_primary(primary);

	debugfs_remove_recursive(sd->dfs);



	sd_info(primary, "group id %#x, uncombined\n", sd->group_id);

out: