/* * Copyright (C) 2023 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include #include const int32_t kMaxVersionLength = 64; int32_t initialize_mali_gpu(const int32_t mali_fd, mali_gpu_info* gpu_info) { int32_t ret = 0; int32_t version_len = 0; // Perform version check handshake struct kbase_ioctl_version_check vc = {0}; ret = ioctl(mali_fd, KBASE_IOCTL_VERSION_CHECK_JM, &vc); if (ret < 0) { ret = ioctl(mali_fd, KBASE_IOCTL_VERSION_CHECK_CSF, &vc); if (ret < 0) { printf("Unexpected Mali GPU architecture!"); return EXIT_FAILURE; } gpu_info->is_csf = true; } // Set flags to initialize context struct kbase_ioctl_set_flags set_flags = {.create_flags = 0}; ret = ioctl(mali_fd, KBASE_IOCTL_SET_FLAGS, &set_flags); if (ret < 0) { printf("Failed to set flags!"); return EXIT_FAILURE; } // Map tracking page gpu_info->tracking_page = mmap(NULL, getpagesize(), PROT_NONE, MAP_SHARED, mali_fd, BASE_MEM_MAP_TRACKING_HANDLE); if (gpu_info->tracking_page == MAP_FAILED) { printf("Failed to map tracking page!"); return EXIT_FAILURE; } // Get KMD version string length struct kbase_ioctl_get_ddk_version get_version_len = { .version_buffer = 0, }; version_len = ioctl(mali_fd, KBASE_IOCTL_GET_DDK_VERSION, &get_version_len); if (version_len < 0) { teardown(gpu_info); printf("Unexpected KMD version string length!"); return EXIT_FAILURE; } // Get KMD version string char version_str[kMaxVersionLength]; memset(version_str, '\0', kMaxVersionLength); struct kbase_ioctl_get_ddk_version get_version = { .version_buffer = (__u64)&version_str, .size = version_len, }; ret = ioctl(mali_fd, KBASE_IOCTL_GET_DDK_VERSION, &get_version); if (ret < 0) { teardown(gpu_info); printf("Unexpected KMD version string!"); return EXIT_FAILURE; } version_str[version_len] = '\0'; // Parse KMD version string with the format `K:rpX-XXXXXX(GPL)` sscanf(version_str, "K:r%up", &(gpu_info->version)); if (gpu_info->version == 0) { teardown(gpu_info); printf("Parsing failed! Unexpected KMD version string!"); return EXIT_FAILURE; } return EXIT_SUCCESS; } void teardown(struct mali_gpu_info* gpu_info) { if (!(gpu_info->tracking_page)) { munmap(gpu_info->tracking_page, getpagesize()); gpu_info->tracking_page = NULL; } }