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Andy Ritger
2022-05-09 13:18:59 -07:00
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src/nvidia-modeset/os-interface/include/nvidia-modeset-os-interface.h Normal file
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/*
* SPDX-FileCopyrightText: Copyright (c) 2015 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
* SPDX-License-Identifier: MIT
*
* 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 AUTHORS OR COPYRIGHT HOLDERS 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.
*/
/*!
* Define the entry points which the NVKMS kernel interface layer
* provides to core NVKMS.
*/
#if !defined(_NVIDIA_MODESET_OS_INTERFACE_H_)
#define _NVIDIA_MODESET_OS_INTERFACE_H_
#if defined(NV_KERNEL_INTERFACE_LAYER) && defined(NV_LINUX)
#include <linux/stddef.h> /* size_t */
#else
#include <stddef.h> /* size_t */
#endif
#include "nvtypes.h" /* NvU8 */
#include "nvkms.h"
#include "nv_stdarg.h"
enum NvKmsSyncPtOp {
NVKMS_SYNCPT_OP_ALLOC,
NVKMS_SYNCPT_OP_GET,
NVKMS_SYNCPT_OP_PUT,
NVKMS_SYNCPT_OP_INCR_MAX,
NVKMS_SYNCPT_OP_CPU_INCR,
NVKMS_SYNCPT_OP_FD_TO_ID_AND_THRESH,
NVKMS_SYNCPT_OP_ID_AND_THRESH_TO_FD,
NVKMS_SYNCPT_OP_READ_MINVAL,
NVKMS_SYNCPT_OP_READ_MAXVAL,
NVKMS_SYNCPT_OP_SET_MIN_EQ_MAX,
NVKMS_SYNCPT_OP_SET_MAXVAL,
};
typedef struct {
struct {
const char *syncpt_name; /* in */
NvU32 id; /* out */
} alloc;
struct {
NvU32 id; /* in */
} get;
struct {
NvU32 id; /* in */
} put;
struct {
NvU32 id; /* in */
NvU32 incr; /* in */
NvU32 value; /* out */
} incr_max;
struct {
NvU32 id; /* in */
} cpu_incr;
struct {
NvS32 fd; /* in */
NvU32 id; /* out */
NvU32 thresh; /* out */
} fd_to_id_and_thresh;
struct {
NvU32 id; /* in */
NvU32 thresh; /* in */
NvS32 fd; /* out */
} id_and_thresh_to_fd;
struct {
NvU32 id; /* in */
NvU32 minval; /* out */
} read_minval;
struct {
NvU32 id; /* in */
NvU32 maxval; /* out */
} read_maxval;
struct {
NvU32 id; /* in */
} set_min_eq_max;
struct {
NvU32 id; /* in */
NvU32 val; /* in */
} set_maxval;
} NvKmsSyncPtOpParams;
void nvkms_call_rm (void *ops);
void* nvkms_alloc (size_t size,
NvBool zero);
void nvkms_free (void *ptr,
size_t size);
void* nvkms_memset (void *ptr,
NvU8 c,
size_t size);
void* nvkms_memcpy (void *dest,
const void *src,
size_t n);
void* nvkms_memmove (void *dest,
const void *src,
size_t n);
int nvkms_memcmp (const void *s1,
const void *s2,
size_t n);
size_t nvkms_strlen (const char *s);
int nvkms_strcmp (const char *s1,
const char *s2);
char* nvkms_strncpy (char *dest,
const char *src,
size_t n);
void nvkms_usleep (NvU64 usec);
NvU64 nvkms_get_usec (void);
int nvkms_copyin (void *kptr,
NvU64 uaddr,
size_t n);
int nvkms_copyout (NvU64 uaddr,
const void *kptr,
size_t n);
void nvkms_yield (void);
void nvkms_dump_stack (void);
NvBool nvkms_syncpt_op (enum NvKmsSyncPtOp op,
NvKmsSyncPtOpParams *params);
int nvkms_snprintf (char *str,
size_t size,
const char *format, ...)
__attribute__((format (printf, 3, 4)));
int nvkms_vsnprintf (char *str,
size_t size,
const char *format,
va_list ap);
#define NVKMS_LOG_LEVEL_INFO 0
#define NVKMS_LOG_LEVEL_WARN 1
#define NVKMS_LOG_LEVEL_ERROR 2
void nvkms_log (const int level,
const char *gpuPrefix,
const char *msg);
/*!
* Refcounted pointer to an object that may be freed while references still
* exist.
*
* This structure is intended to be used for nvkms timers to refer to objects
* that may be freed while timers with references to the object are still
* pending.
*
* When the owner of an nvkms_ref_ptr is freed, the teardown code should call
* nvkms_free_ref_ptr(). That marks the pointer as invalid so that later calls
* to nvkms_dec_ref() (i.e. from a workqueue callback) return NULL rather than
* the pointer originally passed to nvkms_alloc_ref_ptr().
*/
struct nvkms_ref_ptr;
/*!
* Allocate and initialize a ref_ptr.
*
* The pointer stored in the ref_ptr is initialized to ptr, and its refcount is
* initialized to 1.
*/
struct nvkms_ref_ptr* nvkms_alloc_ref_ptr(void *ptr);
/*!
* Clear a ref_ptr.
*
* This function sets the pointer stored in the ref_ptr to NULL and drops the
* reference created by nvkms_alloc_ref_ptr(). This function should be called
* when the object pointed to by the ref_ptr is freed.
*
* A caller should make sure that no code that can call nvkms_inc_ref() can
* execute after nvkms_free_ref_ptr() is called.
*/
void nvkms_free_ref_ptr(struct nvkms_ref_ptr *ref_ptr);
/*!
* Increment the refcount of a ref_ptr.
*
* This function should be used when a pointer to the ref_ptr is stored
* somewhere. For example, when the ref_ptr is used as the argument to
* nvkms_alloc_timer.
*
* This may be called outside of the nvkms_lock, for example by an RM callback.
*/
void nvkms_inc_ref(struct nvkms_ref_ptr *ref_ptr);
/*!
* Decrement the refcount of a ref_ptr and extract the embedded pointer.
*
* This should be used by code that needs to atomically determine whether the
* object pointed to by the ref_ptr still exists. To prevent the object from
* being destroyed while the current thread is executing, this should be called
* from inside the nvkms_lock.
*/
void* nvkms_dec_ref(struct nvkms_ref_ptr *ref_ptr);
typedef void nvkms_timer_proc_t(void *dataPtr, NvU32 dataU32);
typedef struct nvkms_timer_t nvkms_timer_handle_t;
/*!
* Schedule a callback function to be called in the future.
*
* The callback function 'proc' will be called with the arguments
* 'dataPtr' and 'dataU32' at 'usec' (or later) microseconds from now.
* If usec==0, the callback will be scheduled to be called as soon as
* possible.
*
* The callback function is guaranteed to be called back with the
* nvkms_lock held, and in process context.
*
* Returns an opaque handle, nvkms_timer_handle_t*, or NULL on
* failure. If non-NULL, the caller is responsible for caching the
* handle and eventually calling nvkms_free_timer() to free the
* memory.
*
* The nvkms_lock may be held when nvkms_alloc_timer() is called, but
* the nvkms_lock is not required.
*/
nvkms_timer_handle_t* nvkms_alloc_timer (nvkms_timer_proc_t *proc,
void *dataPtr, NvU32 dataU32,
NvU64 usec);
/*!
* Schedule a callback function to be called in the future.
*
* This function is like nvkms_alloc_timer() except that instead of returning a
* pointer to a structure that the caller should free later, the timer will free
* itself after executing the callback function. This is only intended for
* cases where the caller cannot cache the nvkms_alloc_timer() return value.
*/
NvBool
nvkms_alloc_timer_with_ref_ptr(nvkms_timer_proc_t *proc,
struct nvkms_ref_ptr *ref_ptr,
NvU32 dataU32, NvU64 usec);
/*!
* Free the nvkms_timer_t object. If the callback function has not
* yet been called, freeing the nvkms_timer_handle_t will guarantee
* that it is not called.
*
* The nvkms_lock must be held when calling nvkms_free_timer().
*/
void nvkms_free_timer (nvkms_timer_handle_t *handle);
/*!
* Notify the NVKMS kernel interface that the event queue has changed.
*
* \param[in] pOpenKernel This indicates the file descriptor
* ("per-open") of the client whose event queue
* has been updated. This is the pointer
* passed by the kernel interface to nvKmsOpen().
* \param[in] eventsAvailable If TRUE, a new event has been added to the
* event queue. If FALSE, the last event has
* been removed from the event queue.
*/
void
nvkms_event_queue_changed(nvkms_per_open_handle_t *pOpenKernel,
NvBool eventsAvailable);
/*!
* Get the "per-open" data (the pointer returned by nvKmsOpen())
* associated with this fd.
*/
void* nvkms_get_per_open_data(int fd);
/*!
* Raise and lower the reference count of the specified GPU.
*/
NvBool nvkms_open_gpu(NvU32 gpuId);
void nvkms_close_gpu(NvU32 gpuId);
/*!
* Enumerate nvidia gpus.
*/
NvU32 nvkms_enumerate_gpus(nv_gpu_info_t *gpu_info);
/*!
* Availability of write combining support for video memory.
*/
NvBool nvkms_allow_write_combining(void);
/*!
* Checks whether the fd is associated with an nvidia character device.
*/
NvBool nvkms_fd_is_nvidia_chardev(int fd);
/*!
* NVKMS interface for kernel space NVKMS clients like KAPI
*/
struct nvkms_per_open;
struct nvkms_per_open* nvkms_open_from_kapi
(
struct NvKmsKapiDevice *device
);
void nvkms_close_from_kapi(struct nvkms_per_open *popen);
NvBool nvkms_ioctl_from_kapi
(
struct nvkms_per_open *popen,
NvU32 cmd, void *params_address, const size_t params_size
);
/*!
* APIs for locking.
*/
typedef struct nvkms_sema_t nvkms_sema_handle_t;
nvkms_sema_handle_t*
nvkms_sema_alloc (void);
void nvkms_sema_free (nvkms_sema_handle_t *sema);
void nvkms_sema_down (nvkms_sema_handle_t *sema);
void nvkms_sema_up (nvkms_sema_handle_t *sema);
/*!
* APIs to register/unregister backlight device.
*/
struct nvkms_backlight_device;
struct nvkms_backlight_device*
nvkms_register_backlight(NvU32 gpu_id, NvU32 display_id, void *drv_priv,
NvU32 current_brightness);
void nvkms_unregister_backlight(struct nvkms_backlight_device *nvkms_bd);
#endif /* _NVIDIA_MODESET_OS_INTERFACE_H_ */