drivers/gpu/drm/amd/include/amd_pcie.h

   1 /*
   2  * Copyright 2015 Advanced Micro Devices, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  */
  22
  23 #ifndef __AMD_PCIE_H__
  24 #define __AMD_PCIE_H__
  25
  26 /* Following flags shows PCIe link speed supported in driver which are decided by chipset and ASIC */
  27 #define CAIL_PCIE_LINK_SPEED_SUPPORT_GEN1        0x00010000
  28 #define CAIL_PCIE_LINK_SPEED_SUPPORT_GEN2        0x00020000
  29 #define CAIL_PCIE_LINK_SPEED_SUPPORT_GEN3        0x00040000
  30 #define CAIL_PCIE_LINK_SPEED_SUPPORT_MASK        0xFFFF0000
  31 #define CAIL_PCIE_LINK_SPEED_SUPPORT_SHIFT       16
  32
  33 /* Following flags shows PCIe link speed supported by ASIC H/W.*/
  34 #define CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN1   0x00000001
  35 #define CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN2   0x00000002
  36 #define CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN3   0x00000004
  37 #define CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_MASK   0x0000FFFF
  38 #define CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_SHIFT  0
  39
  40 /* gen: chipset 1/2, asic 1/2/3 */
  41 #define AMDGPU_DEFAULT_PCIE_GEN_MASK (CAIL_PCIE_LINK_SPEED_SUPPORT_GEN1 \
  42                                       | CAIL_PCIE_LINK_SPEED_SUPPORT_GEN2 \
  43                                       | CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN1 \
  44                                       | CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN2 \
  45                                       | CAIL_ASIC_PCIE_LINK_SPEED_SUPPORT_GEN3)
  46
  47 /* Following flags shows PCIe lane width switch supported in driver which are decided by chipset and ASIC */
  48 #define CAIL_PCIE_LINK_WIDTH_SUPPORT_X1          0x00010000
  49 #define CAIL_PCIE_LINK_WIDTH_SUPPORT_X2          0x00020000
  50 #define CAIL_PCIE_LINK_WIDTH_SUPPORT_X4          0x00040000
  51 #define CAIL_PCIE_LINK_WIDTH_SUPPORT_X8          0x00080000
  52 #define CAIL_PCIE_LINK_WIDTH_SUPPORT_X12         0x00100000
  53 #define CAIL_PCIE_LINK_WIDTH_SUPPORT_X16         0x00200000
  54 #define CAIL_PCIE_LINK_WIDTH_SUPPORT_X32         0x00400000
  55 #define CAIL_PCIE_LINK_WIDTH_SUPPORT_SHIFT       16
  56
  57 /* 1/2/4/8/16 lanes */
  58 #define AMDGPU_DEFAULT_PCIE_MLW_MASK (CAIL_PCIE_LINK_WIDTH_SUPPORT_X1 \
  59                                       | CAIL_PCIE_LINK_WIDTH_SUPPORT_X2 \
  60                                       | CAIL_PCIE_LINK_WIDTH_SUPPORT_X4 \
  61                                       | CAIL_PCIE_LINK_WIDTH_SUPPORT_X8 \
  62                                       | CAIL_PCIE_LINK_WIDTH_SUPPORT_X16)
  63
  64 #endif