1/*
  2 * Copyright (c) 2017, Mellanox Technologies. All rights reserved.
  3 *
  4 * This software is available to you under a choice of one of two
  5 * licenses.  You may choose to be licensed under the terms of the GNU
  6 * General Public License (GPL) Version 2, available from the file
  7 * COPYING in the main directory of this source tree, or the
  8 * OpenIB.org BSD license below:
  9 *
 10 *     Redistribution and use in source and binary forms, with or
 11 *     without modification, are permitted provided that the following
 12 *     conditions are met:
 13 *
 14 *      - Redistributions of source code must retain the above
 15 *        copyright notice, this list of conditions and the following
 16 *        disclaimer.
 17 *
 18 *      - Redistributions in binary form must reproduce the above
 19 *        copyright notice, this list of conditions and the following
 20 *        disclaimer in the documentation and/or other materials
 21 *        provided with the distribution.
 22 *
 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 30 * SOFTWARE.
 31 */
 32
 33#include "cmd.h"
 34
 35int mlx5_cmd_null_mkey(struct mlx5_core_dev *dev, u32 *null_mkey)
 36{
 37	u32 out[MLX5_ST_SZ_DW(query_special_contexts_out)] = {};
 38	u32 in[MLX5_ST_SZ_DW(query_special_contexts_in)]   = {};
 39	int err;
 40
 41	MLX5_SET(query_special_contexts_in, in, opcode,
 42		 MLX5_CMD_OP_QUERY_SPECIAL_CONTEXTS);
 43	err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
 44	if (!err)
 45		*null_mkey = MLX5_GET(query_special_contexts_out, out,
 46				      null_mkey);
 47	return err;
 48}
 49
 50int mlx5_cmd_query_cong_params(struct mlx5_core_dev *dev, int cong_point,
 51			       void *out, int out_size)
 52{
 53	u32 in[MLX5_ST_SZ_DW(query_cong_params_in)] = { };
 54
 55	MLX5_SET(query_cong_params_in, in, opcode,
 56		 MLX5_CMD_OP_QUERY_CONG_PARAMS);
 57	MLX5_SET(query_cong_params_in, in, cong_protocol, cong_point);
 58
 59	return mlx5_cmd_exec(dev, in, sizeof(in), out, out_size);
 60}
 61
 62int mlx5_cmd_modify_cong_params(struct mlx5_core_dev *dev,
 63				void *in, int in_size)
 64{
 65	u32 out[MLX5_ST_SZ_DW(modify_cong_params_out)] = { };
 66
 67	return mlx5_cmd_exec(dev, in, in_size, out, sizeof(out));
 68}
 69
 70int mlx5_cmd_alloc_memic(struct mlx5_memic *memic, phys_addr_t *addr,
 71			  u64 length, u32 alignment)
 72{
 73	struct mlx5_core_dev *dev = memic->dev;
 74	u64 num_memic_hw_pages = MLX5_CAP_DEV_MEM(dev, memic_bar_size)
 75					>> PAGE_SHIFT;
 76	u64 hw_start_addr = MLX5_CAP64_DEV_MEM(dev, memic_bar_start_addr);
 77	u32 max_alignment = MLX5_CAP_DEV_MEM(dev, log_max_memic_addr_alignment);
 78	u32 num_pages = DIV_ROUND_UP(length, PAGE_SIZE);
 79	u32 out[MLX5_ST_SZ_DW(alloc_memic_out)] = {};
 80	u32 in[MLX5_ST_SZ_DW(alloc_memic_in)] = {};
 81	u32 mlx5_alignment;
 82	u64 page_idx = 0;
 83	int ret = 0;
 84
 85	if (!length || (length & MLX5_MEMIC_ALLOC_SIZE_MASK))
 86		return -EINVAL;
 87
 88	/* mlx5 device sets alignment as 64*2^driver_value
 89	 * so normalizing is needed.
 90	 */
 91	mlx5_alignment = (alignment < MLX5_MEMIC_BASE_ALIGN) ? 0 :
 92			 alignment - MLX5_MEMIC_BASE_ALIGN;
 93	if (mlx5_alignment > max_alignment)
 94		return -EINVAL;
 95
 96	MLX5_SET(alloc_memic_in, in, opcode, MLX5_CMD_OP_ALLOC_MEMIC);
 97	MLX5_SET(alloc_memic_in, in, range_size, num_pages * PAGE_SIZE);
 98	MLX5_SET(alloc_memic_in, in, memic_size, length);
 99	MLX5_SET(alloc_memic_in, in, log_memic_addr_alignment,
100		 mlx5_alignment);
101
102	while (page_idx < num_memic_hw_pages) {
103		spin_lock(&memic->memic_lock);
104		page_idx = bitmap_find_next_zero_area(memic->memic_alloc_pages,
105						      num_memic_hw_pages,
106						      page_idx,
107						      num_pages, 0);
108
109		if (page_idx < num_memic_hw_pages)
110			bitmap_set(memic->memic_alloc_pages,
111				   page_idx, num_pages);
112
113		spin_unlock(&memic->memic_lock);
114
115		if (page_idx >= num_memic_hw_pages)
116			break;
117
118		MLX5_SET64(alloc_memic_in, in, range_start_addr,
119			   hw_start_addr + (page_idx * PAGE_SIZE));
120
121		ret = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
122		if (ret) {
123			spin_lock(&memic->memic_lock);
124			bitmap_clear(memic->memic_alloc_pages,
125				     page_idx, num_pages);
126			spin_unlock(&memic->memic_lock);
127
128			if (ret == -EAGAIN) {
129				page_idx++;
130				continue;
131			}
132
133			return ret;
134		}
135
136		*addr = pci_resource_start(dev->pdev, 0) +
137			MLX5_GET64(alloc_memic_out, out, memic_start_addr);
138
139		return 0;
140	}
141
142	return -ENOMEM;
143}
144
145int mlx5_cmd_dealloc_memic(struct mlx5_memic *memic, u64 addr, u64 length)
146{
147	struct mlx5_core_dev *dev = memic->dev;
148	u64 hw_start_addr = MLX5_CAP64_DEV_MEM(dev, memic_bar_start_addr);
149	u32 num_pages = DIV_ROUND_UP(length, PAGE_SIZE);
150	u32 out[MLX5_ST_SZ_DW(dealloc_memic_out)] = {0};
151	u32 in[MLX5_ST_SZ_DW(dealloc_memic_in)] = {0};
152	u64 start_page_idx;
153	int err;
154
155	addr -= pci_resource_start(dev->pdev, 0);
156	start_page_idx = (addr - hw_start_addr) >> PAGE_SHIFT;
157
158	MLX5_SET(dealloc_memic_in, in, opcode, MLX5_CMD_OP_DEALLOC_MEMIC);
159	MLX5_SET64(dealloc_memic_in, in, memic_start_addr, addr);
160	MLX5_SET(dealloc_memic_in, in, memic_size, length);
161
162	err =  mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
163
164	if (!err) {
165		spin_lock(&memic->memic_lock);
166		bitmap_clear(memic->memic_alloc_pages,
167			     start_page_idx, num_pages);
168		spin_unlock(&memic->memic_lock);
169	}
170
171	return err;
172}