cregit-Linux how code gets into the kernel

Release 4.11 drivers/gpu/drm/amd/powerplay/hwmgr/pp_acpi.c

/*
 * Copyright 2016 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 <linux/errno.h>
#include "linux/delay.h"
#include "hwmgr.h"
#include "amd_acpi.h"
#include "pp_acpi.h"


bool acpi_atcs_functions_supported(void *device, uint32_t index) { int32_t result; struct atcs_verify_interface output_buf = {0}; int32_t temp_buffer = 1; result = cgs_call_acpi_method(device, CGS_ACPI_METHOD_ATCS, ATCS_FUNCTION_VERIFY_INTERFACE, &temp_buffer, &output_buf, 1, sizeof(temp_buffer), sizeof(output_buf)); return result == 0 ? (output_buf.function_bits & (1 << (index - 1))) != 0 : false; }

Contributors

PersonTokensPropCommitsCommitProp
Jammy Zhou82100.00%1100.00%
Total82100.00%1100.00%


bool acpi_atcs_notify_pcie_device_ready(void *device) { int32_t temp_buffer = 1; return cgs_call_acpi_method(device, CGS_ACPI_METHOD_ATCS, ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION, &temp_buffer, NULL, 0, sizeof(temp_buffer), 0); }

Contributors

PersonTokensPropCommitsCommitProp
Rex Zhu38100.00%1100.00%
Total38100.00%1100.00%


int acpi_pcie_perf_request(void *device, uint8_t perf_req, bool advertise) { struct atcs_pref_req_input atcs_input; struct atcs_pref_req_output atcs_output; u32 retry = 3; int result; struct cgs_system_info info = {0}; if (acpi_atcs_notify_pcie_device_ready(device)) return -EINVAL; info.size = sizeof(struct cgs_system_info); info.info_id = CGS_SYSTEM_INFO_ADAPTER_BDF_ID; result = cgs_query_system_info(device, &info); if (result != 0) return -EINVAL; atcs_input.client_id = (uint16_t)info.value; atcs_input.size = sizeof(struct atcs_pref_req_input); atcs_input.valid_flags_mask = ATCS_VALID_FLAGS_MASK; atcs_input.flags = ATCS_WAIT_FOR_COMPLETION; if (advertise) atcs_input.flags |= ATCS_ADVERTISE_CAPS; atcs_input.req_type = ATCS_PCIE_LINK_SPEED; atcs_input.perf_req = perf_req; atcs_output.size = sizeof(struct atcs_pref_req_input); while (retry--) { result = cgs_call_acpi_method(device, CGS_ACPI_METHOD_ATCS, ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST, &atcs_input, &atcs_output, 1, sizeof(atcs_input), sizeof(atcs_output)); if (result != 0) return -EIO; switch (atcs_output.ret_val) { case ATCS_REQUEST_REFUSED: default: return -EINVAL; case ATCS_REQUEST_COMPLETE: return 0; case ATCS_REQUEST_IN_PROGRESS: udelay(10); break; } } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Jammy Zhou22999.13%133.33%
Rex Zhu20.87%266.67%
Total231100.00%3100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Jammy Zhou32388.01%120.00%
Rex Zhu4010.90%240.00%
Baoyou Xie30.82%120.00%
Alex Deucher10.27%120.00%
Total367100.00%5100.00%
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