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Viewing changes to src/broadcom/drm-shim/vc4_noop.c

  • Committer: mmach
  • Date: 2022-09-22 19:56:13 UTC
  • Revision ID: netbit73@gmail.com-20220922195613-wtik9mmy20tmor0i
2022-09-22 21:17:09

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src/broadcom/drm-shim/vc4_noop.c
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/*
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 * Copyright (c) 2021 Etnaviv Project
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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 (including the next
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 * paragraph) shall be included in all copies or substantial portions of the
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 * 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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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/ioctl.h>
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#include "drm-uapi/vc4_drm.h"
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#include "drm-shim/drm_shim.h"
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bool drm_shim_driver_prefers_first_render_node = true;
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static int
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vc4_ioctl_noop(int fd, unsigned long request, void *arg)
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{
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        return 0;
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}
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static int
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vc4_ioctl_create_bo(int fd, unsigned long request, void *arg)
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{
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        struct shim_fd *shim_fd = drm_shim_fd_lookup(fd);
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        struct drm_vc4_create_bo *create = arg;
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        struct shim_bo *bo = calloc(1, sizeof(*bo));
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        drm_shim_bo_init(bo, create->size);
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        create->handle = drm_shim_bo_get_handle(shim_fd, bo);
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        drm_shim_bo_put(bo);
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        return 0;
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}
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static int
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vc4_ioctl_mmap_bo(int fd, unsigned long request, void *arg)
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{
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        struct shim_fd *shim_fd = drm_shim_fd_lookup(fd);
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        struct drm_vc4_mmap_bo *map = arg;
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        struct shim_bo *bo = drm_shim_bo_lookup(shim_fd, map->handle);
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        map->offset = drm_shim_bo_get_mmap_offset(shim_fd, bo);
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        drm_shim_bo_put(bo);
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        return 0;
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}
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static int
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vc4_ioctl_get_param(int fd, unsigned long request, void *arg)
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{
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        struct drm_vc4_get_param *gp = arg;
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        static const uint32_t param_map[] = {
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                [DRM_VC4_PARAM_V3D_IDENT0] = 0x2000000,
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                [DRM_VC4_PARAM_V3D_IDENT1] = 0x0000001,
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        };
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        switch (gp->param) {
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        case DRM_VC4_PARAM_SUPPORTS_BRANCHES:
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        case DRM_VC4_PARAM_SUPPORTS_ETC1:
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        case DRM_VC4_PARAM_SUPPORTS_THREADED_FS:
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        case DRM_VC4_PARAM_SUPPORTS_FIXED_RCL_ORDER:
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                gp->value = 1;
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                return 0;
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        case DRM_VC4_PARAM_SUPPORTS_MADVISE:
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        case DRM_VC4_PARAM_SUPPORTS_PERFMON:
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                gp->value = 0;
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                return 0;
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        default:
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                break;
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        }
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        if (gp->param < ARRAY_SIZE(param_map) && param_map[gp->param]) {
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                gp->value = param_map[gp->param];
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                return 0;
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        }
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        fprintf(stderr, "Unknown DRM_IOCTL_VC4_GET_PARAM %d\n", gp->param);
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        return -1;
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}
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static ioctl_fn_t driver_ioctls[] = {
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        [DRM_VC4_CREATE_BO] = vc4_ioctl_create_bo,
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        [DRM_VC4_MMAP_BO] = vc4_ioctl_mmap_bo,
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        [DRM_VC4_GET_PARAM] = vc4_ioctl_get_param,
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        [DRM_VC4_GET_TILING] = vc4_ioctl_noop,
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        [DRM_VC4_LABEL_BO] = vc4_ioctl_noop,
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};
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void
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drm_shim_driver_init(void)
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{
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        shim_device.bus_type = DRM_BUS_PLATFORM;
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        shim_device.driver_name = "vc4";
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        shim_device.driver_ioctls = driver_ioctls;
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        shim_device.driver_ioctl_count = ARRAY_SIZE(driver_ioctls);
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        drm_shim_override_file("OF_FULLNAME=/rdb/vc4\n"
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                               "OF_COMPATIBLE_N=1\n"
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                               "OF_COMPATIBLE_0=brcm,7278-vc4\n",
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                               "/sys/dev/char/%d:%d/device/uevent",
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                               DRM_MAJOR, render_node_minor);
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}