drivers/infiniband/hw/mlx5/cmd.c

   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
  35 int mlx5_cmd_dump_fill_mkey(struct mlx5_core_dev *dev, u32 *mkey)
  36 {
  37         u32 out[MLX5_ST_SZ_DW(query_special_contexts_out)] = {0};
  38         u32 in[MLX5_ST_SZ_DW(query_special_contexts_in)]   = {0};
  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                 *mkey = MLX5_GET(query_special_contexts_out, out,
  46                                  dump_fill_mkey);
  47         return err;
  48 }
  49
  50 int mlx5_cmd_null_mkey(struct mlx5_core_dev *dev, u32 *null_mkey)
  51 {
  52         u32 out[MLX5_ST_SZ_DW(query_special_contexts_out)] = {};
  53         u32 in[MLX5_ST_SZ_DW(query_special_contexts_in)]   = {};
  54         int err;
  55
  56         MLX5_SET(query_special_contexts_in, in, opcode,
  57                  MLX5_CMD_OP_QUERY_SPECIAL_CONTEXTS);
  58         err = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
  59         if (!err)
  60                 *null_mkey = MLX5_GET(query_special_contexts_out, out,
  61                                       null_mkey);
  62         return err;
  63 }
  64
  65 int mlx5_cmd_query_cong_params(struct mlx5_core_dev *dev, int cong_point,
  66                                void *out, int out_size)
  67 {
  68         u32 in[MLX5_ST_SZ_DW(query_cong_params_in)] = { };
  69
  70         MLX5_SET(query_cong_params_in, in, opcode,
  71                  MLX5_CMD_OP_QUERY_CONG_PARAMS);
  72         MLX5_SET(query_cong_params_in, in, cong_protocol, cong_point);
  73
  74         return mlx5_cmd_exec(dev, in, sizeof(in), out, out_size);
  75 }
  76
  77 int mlx5_cmd_modify_cong_params(struct mlx5_core_dev *dev,
  78                                 void *in, int in_size)
  79 {
  80         u32 out[MLX5_ST_SZ_DW(modify_cong_params_out)] = { };
  81
  82         return mlx5_cmd_exec(dev, in, in_size, out, sizeof(out));
  83 }
  84
  85 int mlx5_cmd_alloc_memic(struct mlx5_memic *memic, phys_addr_t *addr,
  86                           u64 length, u32 alignment)
  87 {
  88         struct mlx5_core_dev *dev = memic->dev;
  89         u64 num_memic_hw_pages = MLX5_CAP_DEV_MEM(dev, memic_bar_size)
  90                                         >> PAGE_SHIFT;
  91         u64 hw_start_addr = MLX5_CAP64_DEV_MEM(dev, memic_bar_start_addr);
  92         u32 max_alignment = MLX5_CAP_DEV_MEM(dev, log_max_memic_addr_alignment);
  93         u32 num_pages = DIV_ROUND_UP(length, PAGE_SIZE);
  94         u32 out[MLX5_ST_SZ_DW(alloc_memic_out)] = {};
  95         u32 in[MLX5_ST_SZ_DW(alloc_memic_in)] = {};
  96         u32 mlx5_alignment;
  97         u64 page_idx = 0;
  98         int ret = 0;
  99
 100         if (!length || (length & MLX5_MEMIC_ALLOC_SIZE_MASK))
 101                 return -EINVAL;
 102
 103         /* mlx5 device sets alignment as 64*2^driver_value
 104          * so normalizing is needed.
 105          */
 106         mlx5_alignment = (alignment < MLX5_MEMIC_BASE_ALIGN) ? 0 :
 107                          alignment - MLX5_MEMIC_BASE_ALIGN;
 108         if (mlx5_alignment > max_alignment)
 109                 return -EINVAL;
 110
 111         MLX5_SET(alloc_memic_in, in, opcode, MLX5_CMD_OP_ALLOC_MEMIC);
 112         MLX5_SET(alloc_memic_in, in, range_size, num_pages * PAGE_SIZE);
 113         MLX5_SET(alloc_memic_in, in, memic_size, length);
 114         MLX5_SET(alloc_memic_in, in, log_memic_addr_alignment,
 115                  mlx5_alignment);
 116
 117         while (page_idx < num_memic_hw_pages) {
 118                 spin_lock(&memic->memic_lock);
 119                 page_idx = bitmap_find_next_zero_area(memic->memic_alloc_pages,
 120                                                       num_memic_hw_pages,
 121                                                       page_idx,
 122                                                       num_pages, 0);
 123
 124                 if (page_idx < num_memic_hw_pages)
 125                         bitmap_set(memic->memic_alloc_pages,
 126                                    page_idx, num_pages);
 127
 128                 spin_unlock(&memic->memic_lock);
 129
 130                 if (page_idx >= num_memic_hw_pages)
 131                         break;
 132
 133                 MLX5_SET64(alloc_memic_in, in, range_start_addr,
 134                            hw_start_addr + (page_idx * PAGE_SIZE));
 135
 136                 ret = mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
 137                 if (ret) {
 138                         spin_lock(&memic->memic_lock);
 139                         bitmap_clear(memic->memic_alloc_pages,
 140                                      page_idx, num_pages);
 141                         spin_unlock(&memic->memic_lock);
 142
 143                         if (ret == -EAGAIN) {
 144                                 page_idx++;
 145                                 continue;
 146                         }
 147
 148                         return ret;
 149                 }
 150
 151                 *addr = pci_resource_start(dev->pdev, 0) +
 152                         MLX5_GET64(alloc_memic_out, out, memic_start_addr);
 153
 154                 return 0;
 155         }
 156
 157         return -ENOMEM;
 158 }
 159
 160 int mlx5_cmd_dealloc_memic(struct mlx5_memic *memic, u64 addr, u64 length)
 161 {
 162         struct mlx5_core_dev *dev = memic->dev;
 163         u64 hw_start_addr = MLX5_CAP64_DEV_MEM(dev, memic_bar_start_addr);
 164         u32 num_pages = DIV_ROUND_UP(length, PAGE_SIZE);
 165         u32 out[MLX5_ST_SZ_DW(dealloc_memic_out)] = {0};
 166         u32 in[MLX5_ST_SZ_DW(dealloc_memic_in)] = {0};
 167         u64 start_page_idx;
 168         int err;
 169
 170         addr -= pci_resource_start(dev->pdev, 0);
 171         start_page_idx = (addr - hw_start_addr) >> PAGE_SHIFT;
 172
 173         MLX5_SET(dealloc_memic_in, in, opcode, MLX5_CMD_OP_DEALLOC_MEMIC);
 174         MLX5_SET64(dealloc_memic_in, in, memic_start_addr, addr);
 175         MLX5_SET(dealloc_memic_in, in, memic_size, length);
 176
 177         err =  mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out));
 178
 179         if (!err) {
 180                 spin_lock(&memic->memic_lock);
 181                 bitmap_clear(memic->memic_alloc_pages,
 182                              start_page_idx, num_pages);
 183                 spin_unlock(&memic->memic_lock);
 184         }
 185
 186         return err;
 187 }
 188
 189 int mlx5_cmd_query_ext_ppcnt_counters(struct mlx5_core_dev *dev, void *out)
 190 {
 191         u32 in[MLX5_ST_SZ_DW(ppcnt_reg)] = {};
 192         int sz = MLX5_ST_SZ_BYTES(ppcnt_reg);
 193
 194         MLX5_SET(ppcnt_reg, in, local_port, 1);
 195
 196         MLX5_SET(ppcnt_reg, in, grp, MLX5_ETHERNET_EXTENDED_COUNTERS_GROUP);
 197         return  mlx5_core_access_reg(dev, in, sz, out, sz, MLX5_REG_PPCNT,
 198                                      0, 0);
 199 }