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https://github.com/NVIDIA/open-gpu-kernel-modules.git
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109 lines
3.7 KiB
C
109 lines
3.7 KiB
C
/*
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* SPDX-FileCopyrightText: Copyright (c) 2022-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
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* SPDX-License-Identifier: MIT
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#define __NO_VERSION__
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#include "os-interface.h"
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#include "nv-linux.h"
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#if IS_ENABLED(CONFIG_TEGRA_BPMP)
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#include <soc/tegra/bpmp-abi.h>
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#include <soc/tegra/bpmp.h>
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#endif // IS_ENABLED(CONFIG_TEGRA_BPMP)
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/*!
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* @brief Sends an MRQ (message-request) to BPMP
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*
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* The request, response, and ret parameters of this function correspond to the
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* components of the tegra_bpmp_message struct, which BPMP uses to receive
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* MRQs.
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*
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* @param[in] nv Per GPU Linux state
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* @param[in] mrq MRQ_xxx ID specifying what is requested
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* @param[in] request_data Pointer to request input data
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* @param[in] request_data_size Size of structure pointed to by pRequestData
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* @param[out] response_data Pointer to response output data
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* @param[in] response_data_size Size of structure pointed to by pResponseData
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* @param[out] ret MRQ return code (from "ret" element of
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* tegra_bpmp_message struct)
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* @param[out] api_ret Return code from tegra_bpmp_transfer call
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*
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* @returns NV_OK if successful,
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* NV_ERR_NOT_SUPPORTED if the functionality is not available,
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* NV_ERR_INVALID_POINTER if the tegra_bpmp struct pointer could not
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* be obtained from nv, or
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* NV_ERR_GENERIC if the tegra_bpmp_transfer call failed (see apiRet
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* for Linux error code).
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*/
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NV_STATUS NV_API_CALL
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nv_bpmp_send_mrq
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(
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nv_state_t *nv,
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NvU32 mrq,
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const void *request_data,
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NvU32 request_data_size,
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void *response_data,
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NvU32 response_data_size,
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NvS32 *ret,
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NvS32 *api_ret
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)
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{
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#if IS_ENABLED(CONFIG_TEGRA_BPMP) && NV_SUPPORTS_PLATFORM_DEVICE
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nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
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struct tegra_bpmp *bpmp;
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struct tegra_bpmp_message msg;
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bpmp = tegra_bpmp_get(nvl->dev);
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if (IS_ERR(bpmp))
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{
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nv_printf(NV_DBG_ERRORS,
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"NVRM: Error getting bpmp struct: %s\n",
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PTR_ERR(bpmp));
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return NV_ERR_INVALID_POINTER;
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}
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// Send the MRQ request to BPMP.
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memset(&msg, 0, sizeof(msg));
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msg.mrq = mrq;
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msg.tx.data = request_data;
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msg.tx.size = (size_t) request_data_size;
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msg.rx.data = response_data;
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msg.rx.size = (size_t) response_data_size;
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*api_ret = (NvS32) tegra_bpmp_transfer(bpmp, &msg);
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if (*api_ret == 0)
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{
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*ret = (NvS32) msg.rx.ret;
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return NV_OK;
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}
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else
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{
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return NV_ERR_GENERIC;
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}
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#else
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return NV_ERR_NOT_SUPPORTED;
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#endif
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}
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