123 lines
4.2 KiB
C
123 lines
4.2 KiB
C
/*
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* SPDX-FileCopyrightText: Copyright (c) 2015 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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#ifndef _NV_MODESET_INTERFACE_H_
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#define _NV_MODESET_INTERFACE_H_
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/*
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* This file defines the interface between the nvidia and
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* nvidia-modeset UNIX kernel modules.
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*
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* The nvidia-modeset kernel module calls the nvidia kernel module's
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* nvidia_get_rm_ops() function to get the RM API function pointers
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* which it will need.
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*/
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#include "nvstatus.h"
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#include "nv-gpu-info.h"
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/*
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* nvidia_stack_s is defined in nv.h, which pulls in a lot of other
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* dependencies. The nvidia-modeset kernel module doesn't need to
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* dereference the nvidia_stack_s pointer, so just treat is as an
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* opaque pointer for purposes of this API definition.
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*/
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typedef struct nvidia_stack_s *nvidia_modeset_stack_ptr;
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/*
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* Callback functions from the RM OS interface layer into the NVKMS OS interface
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* layer.
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*
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* These functions should be called without the RM lock held, using the kernel's
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* native calling convention.
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*/
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typedef struct {
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/*
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* Suspend & resume callbacks. Note that these are called once per GPU.
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*/
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void (*suspend)(NvU32 gpu_id);
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void (*resume)(NvU32 gpu_id);
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} nvidia_modeset_callbacks_t;
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/*
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* The RM API entry points which the nvidia-modeset kernel module should
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* call in the nvidia kernel module.
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*/
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typedef struct {
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/*
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* The nvidia-modeset kernel module should assign version_string
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* before passing the structure to the nvidia kernel module, so
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* that a version match can be confirmed: it is not supported to
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* mix nvidia and nvidia-modeset kernel modules from different
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* releases.
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*/
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const char *version_string;
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/*
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* Return system information.
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*/
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struct {
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/* Availability of write combining support for video memory */
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NvBool allow_write_combining;
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} system_info;
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/*
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* Allocate and free an nvidia_stack_t to pass into
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* nvidia_modeset_rm_ops_t::op(). An nvidia_stack_t must only be
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* used by one thread at a time.
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*
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* Note that on architectures where an alternate stack is not
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* used, alloc_stack() will set sp=NULL even when it returns 0
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* (success). I.e., check the return value, not the sp value.
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*/
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int (*alloc_stack)(nvidia_modeset_stack_ptr *sp);
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void (*free_stack)(nvidia_modeset_stack_ptr sp);
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/*
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* Enumerate list of gpus probed by nvidia driver.
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*
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* gpu_info is an array of NVIDIA_MAX_GPUS elements. The number of GPUs
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* in the system is returned.
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*/
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NvU32 (*enumerate_gpus)(nv_gpu_info_t *gpu_info);
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/*
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* {open,close}_gpu() raise and lower the reference count of the
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* specified GPU. This is equivalent to opening and closing a
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* /dev/nvidiaN device file from user-space.
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*/
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int (*open_gpu)(NvU32 gpu_id, nvidia_modeset_stack_ptr sp);
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void (*close_gpu)(NvU32 gpu_id, nvidia_modeset_stack_ptr sp);
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void (*op)(nvidia_modeset_stack_ptr sp, void *ops_cmd);
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int (*set_callbacks)(const nvidia_modeset_callbacks_t *cb);
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} nvidia_modeset_rm_ops_t;
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NV_STATUS nvidia_get_rm_ops(nvidia_modeset_rm_ops_t *rm_ops);
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#endif /* _NV_MODESET_INTERFACE_H_ */
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