/* $NetBSD: amdgpu_pppcielanes.c,v 1.2 2021/12/18 23:45:26 riastradh Exp $ */ /* * Copyright 2015 Advanced Micro Devices, Inc. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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 <sys/cdefs.h> __KERNEL_RCSID(0, "$NetBSD: amdgpu_pppcielanes.c,v 1.2 2021/12/18 23:45:26 riastradh Exp $"); #include <linux/types.h> #include "atom-types.h" #include "atombios.h" #include "pppcielanes.h" /** \file * Functions related to PCIe lane changes. */ /* For converting from number of lanes to lane bits. */ static const unsigned char pp_r600_encode_lanes[] = { 0, /* 0 Not Supported */ 1, /* 1 Lane */ 2, /* 2 Lanes */ 0, /* 3 Not Supported */ 3, /* 4 Lanes */ 0, /* 5 Not Supported */ 0, /* 6 Not Supported */ 0, /* 7 Not Supported */ 4, /* 8 Lanes */ 0, /* 9 Not Supported */ 0, /* 10 Not Supported */ 0, /* 11 Not Supported */ 5, /* 12 Lanes (Not actually supported) */ 0, /* 13 Not Supported */ 0, /* 14 Not Supported */ 0, /* 15 Not Supported */ 6 /* 16 Lanes */ }; static const unsigned char pp_r600_decoded_lanes[8] = { 16, 1, 2, 4, 8, 12, 16, }; uint8_t encode_pcie_lane_width(uint32_t num_lanes) { return pp_r600_encode_lanes[num_lanes]; } uint8_t decode_pcie_lane_width(uint32_t num_lanes) { return pp_r600_decoded_lanes[num_lanes]; } |