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/*
* Copyright (c) 2017, Mellanox Technologies. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "cmd.h"
int mlx5_cmd_null_mkey(struct mlx5_core_dev *dev, u32 *null_mkey)
{
u32 out[MLX5_ST_SZ_DW(query_special_contexts_out)] = {};
u32 in[MLX5_ST_SZ_DW(query_special_contexts_in)] = {};
int err;
MLX5_SET(query_special_contexts_in, in, opcode,
MLX5_CMD_OP_QUERY_SPECIAL_CONTEXTS);
err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
if (!err)
*null_mkey = MLX5_GET(query_special_contexts_out, out,
null_mkey);
return err;
}
int mlx5_cmd_query_cong_params(struct mlx5_core_dev *dev, int cong_point,
void *out, int out_size)
{
u32 in[MLX5_ST_SZ_DW(query_cong_params_in)] = { };
MLX5_SET(query_cong_params_in, in, opcode,
MLX5_CMD_OP_QUERY_CONG_PARAMS);
MLX5_SET(query_cong_params_in, in, cong_protocol, cong_point);
return mlx5_cmd_exec(dev, in, sizeof(in), out, out_size);
}
int mlx5_cmd_modify_cong_params(struct mlx5_core_dev *dev,
void *in, int in_size)
{
u32 out[MLX5_ST_SZ_DW(modify_cong_params_out)] = { };
return mlx5_cmd_exec(dev, in, in_size, out, sizeof(out));
}
int mlx5_cmd_alloc_memic(struct mlx5_memic *memic, phys_addr_t *addr,
u64 length, u32 alignment)
{
struct mlx5_core_dev *dev = memic->dev;
u64 num_memic_hw_pages = MLX5_CAP_DEV_MEM(dev, memic_bar_size)
>> PAGE_SHIFT;
u64 hw_start_addr = MLX5_CAP64_DEV_MEM(dev, memic_bar_start_addr);
u32 max_alignment = MLX5_CAP_DEV_MEM(dev, log_max_memic_addr_alignment);
u32 num_pages = DIV_ROUND_UP(length, PAGE_SIZE);
u32 out[MLX5_ST_SZ_DW(alloc_memic_out)] = {};
u32 in[MLX5_ST_SZ_DW(alloc_memic_in)] = {};
u32 mlx5_alignment;
u64 page_idx = 0;
int ret = 0;
if (!length || (length & MLX5_MEMIC_ALLOC_SIZE_MASK))
return -EINVAL;
/* mlx5 device sets alignment as 64*2^driver_value
* so normalizing is needed.
*/
mlx5_alignment = (alignment < MLX5_MEMIC_BASE_ALIGN) ? 0 :
alignment - MLX5_MEMIC_BASE_ALIGN;
if (mlx5_alignment > max_alignment)
return -EINVAL;
MLX5_SET(alloc_memic_in, in, opcode, MLX5_CMD_OP_ALLOC_MEMIC);
MLX5_SET(alloc_memic_in, in, range_size, num_pages * PAGE_SIZE);
MLX5_SET(alloc_memic_in, in, memic_size, length);
MLX5_SET(alloc_memic_in, in, log_memic_addr_alignment,
mlx5_alignment);
while (page_idx < num_memic_hw_pages) {
spin_lock(&memic->memic_lock);
page_idx = bitmap_find_next_zero_area(memic->memic_alloc_pages,
num_memic_hw_pages,
page_idx,
num_pages, 0);
if (page_idx < num_memic_hw_pages)
bitmap_set(memic->memic_alloc_pages,
page_idx, num_pages);
spin_unlock(&memic->memic_lock);
if (page_idx >= num_memic_hw_pages)
break;
MLX5_SET64(alloc_memic_in, in, range_start_addr,
hw_start_addr + (page_idx * PAGE_SIZE));
ret = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
if (ret) {
spin_lock(&memic->memic_lock);
bitmap_clear(memic->memic_alloc_pages,
page_idx, num_pages);
spin_unlock(&memic->memic_lock);
if (ret == -EAGAIN) {
page_idx++;
continue;
}
return ret;
}
*addr = pci_resource_start(dev->pdev, 0) +
MLX5_GET64(alloc_memic_out, out, memic_start_addr);
return 0;
}
return -ENOMEM;
}
int mlx5_cmd_dealloc_memic(struct mlx5_memic *memic, u64 addr, u64 length)
{
struct mlx5_core_dev *dev = memic->dev;
u64 hw_start_addr = MLX5_CAP64_DEV_MEM(dev, memic_bar_start_addr);
u32 num_pages = DIV_ROUND_UP(length, PAGE_SIZE);
u32 out[MLX5_ST_SZ_DW(dealloc_memic_out)] = {0};
u32 in[MLX5_ST_SZ_DW(dealloc_memic_in)] = {0};
u64 start_page_idx;
int err;
addr -= pci_resource_start(dev->pdev, 0);
start_page_idx = (addr - hw_start_addr) >> PAGE_SHIFT;
MLX5_SET(dealloc_memic_in, in, opcode, MLX5_CMD_OP_DEALLOC_MEMIC);
MLX5_SET64(dealloc_memic_in, in, memic_start_addr, addr);
MLX5_SET(dealloc_memic_in, in, memic_size, length);
err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
if (!err) {
spin_lock(&memic->memic_lock);
bitmap_clear(memic->memic_alloc_pages,
start_page_idx, num_pages);
spin_unlock(&memic->memic_lock);
}
return err;
}
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