xref: /aosp_15_r20/external/mesa3d/src/loader/loader.h (revision 6104692788411f58d303aa86923a9ff6ecaded22)

/*
 * Copyright (C) 2013 Rob Clark <[email protected]>
 *
 * 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 (including the next
 * paragraph) 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.
 *
 * Authors:
 *    Rob Clark <[email protected]>
 */

#ifndef LOADER_H
#define LOADER_H

#include <stdbool.h>
#include <sys/stat.h>
#include <stddef.h>
#include "mesa_interface.h"

#ifdef __cplusplus
extern "C" {
#endif

struct __DRIextensionRec;

/* Helpers to figure out driver and device name, eg. from pci-id, etc. */

int
loader_open_device(const char *);

char *
loader_get_kernel_driver_name(int fd);

int
loader_open_render_node_platform_device(const char * const drivers[],
                                        unsigned int n_drivers);

bool
loader_is_device_render_capable(int fd);

char *
loader_get_render_node(dev_t device);

bool
loader_get_pci_id_for_fd(int fd, int *vendor_id, int *chip_id);

char *
loader_get_driver_for_fd(int fd);

void *
loader_open_driver_lib(const char *driver_name,
                       const char *lib_suffix,
                       const char **search_path_vars,
                       const char *default_search_path,
                       bool warn_on_fail);

char *
loader_get_device_name_for_fd(int fd);

/* For dri prime gpu offloading this function will take current render fd and possibly
 * update it with new prime gpu offloading fd. For dri prime gpu offloading optionally
 * this function can return the original fd. Also this function returns true/false based
 * on render gpu is different from display gpu.
 */

bool
loader_get_user_preferred_fd(int *fd_render_gpu, int *original_fd);

/* for logging.. keep this aligned with egllog.h so we can just use
 * _eglLog directly.
 */

#define _LOADER_FATAL   0   /* unrecoverable error */
#define _LOADER_WARNING 1   /* recoverable error/problem */
#define _LOADER_INFO    2   /* just useful info */
#define _LOADER_DEBUG   3   /* useful info for debugging */

typedef void loader_logger(int level, const char *fmt, ...);
void
loader_set_logger(loader_logger *logger);

struct dri_extension_match {
   /* __DRI_* extension name */
   const char *name;

   /* Required minimum version in the extension struct */
   int version;

   /* offset in the data arg at which to store a pointer to the extension */
   int offset;

   bool optional;
};

bool loader_bind_extensions(void *data,
                            const struct dri_extension_match *matches, size_t num_matches,
                            const __DRIextension **extensions);

#ifdef __cplusplus
}
#endif

#endif /* LOADER_H */