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Commit e9cad2ce authored by Saeed Mahameed's avatar Saeed Mahameed
Browse files

net/mlx5: FW tracer, register log buffer memory key 



Create a memory key and protection domain for the tracer log buffer.

Signed-off-by: default avatarSaeed Mahameed <saeedm@mellanox.com>
parent 48967ffd

drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c

+61 −3
Original line number Diff line number Diff line
@@ -169,6 +169,48 @@ static void mlx5_fw_tracer_destroy_log_buf(struct mlx5_fw_tracer *tracer) 
	free_pages((unsigned long)tracer->buff.log_buf, get_order(tracer->buff.size));

}



static int mlx5_fw_tracer_create_mkey(struct mlx5_fw_tracer *tracer)

{

	struct mlx5_core_dev *dev = tracer->dev;

	int err, inlen, i;

	__be64 *mtt;

	void *mkc;

	u32 *in;



	inlen = MLX5_ST_SZ_BYTES(create_mkey_in) +

			sizeof(*mtt) * round_up(TRACER_BUFFER_PAGE_NUM, 2);



	in = kvzalloc(inlen, GFP_KERNEL);

	if (!in)

		return -ENOMEM;



	MLX5_SET(create_mkey_in, in, translations_octword_actual_size,

		 DIV_ROUND_UP(TRACER_BUFFER_PAGE_NUM, 2));

	mtt = (u64 *)MLX5_ADDR_OF(create_mkey_in, in, klm_pas_mtt);

	for (i = 0 ; i < TRACER_BUFFER_PAGE_NUM ; i++)

		mtt[i] = cpu_to_be64(tracer->buff.dma + i * PAGE_SIZE);



	mkc = MLX5_ADDR_OF(create_mkey_in, in, memory_key_mkey_entry);

	MLX5_SET(mkc, mkc, access_mode_1_0, MLX5_MKC_ACCESS_MODE_MTT);

	MLX5_SET(mkc, mkc, lr, 1);

	MLX5_SET(mkc, mkc, lw, 1);

	MLX5_SET(mkc, mkc, pd, tracer->buff.pdn);

	MLX5_SET(mkc, mkc, bsf_octword_size, 0);

	MLX5_SET(mkc, mkc, qpn, 0xffffff);

	MLX5_SET(mkc, mkc, log_page_size, PAGE_SHIFT);

	MLX5_SET(mkc, mkc, translations_octword_size,

		 DIV_ROUND_UP(TRACER_BUFFER_PAGE_NUM, 2));

	MLX5_SET64(mkc, mkc, start_addr, tracer->buff.dma);

	MLX5_SET64(mkc, mkc, len, tracer->buff.size);

	err = mlx5_core_create_mkey(dev, &tracer->buff.mkey, in, inlen);

	if (err)

		mlx5_core_warn(dev, "FWTracer: Failed to create mkey, %d\n", err);



	kvfree(in);



	return err;

}



static void mlx5_fw_tracer_free_strings_db(struct mlx5_fw_tracer *tracer)

{

	u32 num_string_db = tracer->str_db.num_string_db;
@@ -363,13 +405,26 @@ int mlx5_fw_tracer_init(struct mlx5_fw_tracer *tracer) 
	if (!tracer->str_db.loaded)

		queue_work(tracer->work_queue, &tracer->read_fw_strings_work);



	err = mlx5_fw_tracer_ownership_acquire(tracer);

	err = mlx5_core_alloc_pd(dev, &tracer->buff.pdn);

	if (err) {

		mlx5_core_dbg(dev, "FWTracer: Ownership was not granted %d\n", err);

		return 0; /* return 0 since ownership can be acquired on a later FW event */

		mlx5_core_warn(dev, "FWTracer: Failed to allocate PD %d\n", err);

		return err;

	}



	err = mlx5_fw_tracer_create_mkey(tracer);

	if (err) {

		mlx5_core_warn(dev, "FWTracer: Failed to create mkey %d\n", err);

		goto err_dealloc_pd;

	}



	err = mlx5_fw_tracer_ownership_acquire(tracer);

	if (err) /* Don't fail since ownership can be acquired on a later FW event */

		mlx5_core_dbg(dev, "FWTracer: Ownership was not granted %d\n", err);



	return 0;

err_dealloc_pd:

	mlx5_core_dealloc_pd(dev, tracer->buff.pdn);

	return err;

}



void mlx5_fw_tracer_cleanup(struct mlx5_fw_tracer *tracer)
@@ -381,6 +436,9 @@ void mlx5_fw_tracer_cleanup(struct mlx5_fw_tracer *tracer) 


	if (tracer->owner)

		mlx5_fw_tracer_ownership_release(tracer);



	mlx5_core_destroy_mkey(tracer->dev, &tracer->buff.mkey);

	mlx5_core_dealloc_pd(tracer->dev, tracer->buff.pdn);

}



void mlx5_fw_tracer_destroy(struct mlx5_fw_tracer *tracer)