| 1 | |
| 2 | * Copyright (c) 2016 Intel Corporation
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| 3 | *
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| 4 | * Permission to use, copy, modify, distribute, and sell this software and its
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| 5 | * documentation for any purpose is hereby granted without fee, provided that
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| 6 | * the above copyright notice appear in all copies and that both that copyright
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| 7 | * notice and this permission notice appear in supporting documentation, and
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| 8 | * that the name of the copyright holders not be used in advertising or
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| 9 | * publicity pertaining to distribution of the software without specific,
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| 10 | * written prior permission. The copyright holders make no representations
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| 11 | * about the suitability of this software for any purpose. It is provided "as
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| 12 | * is" without express or implied warranty.
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| 13 | *
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| 14 | * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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| 15 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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| 16 | * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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| 17 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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| 18 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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| 19 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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| 20 | * OF THIS SOFTWARE.
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| 21 |
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| 22 |
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| 23 | #include <linux/export.h>
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| 24 | #include <linux/uaccess.h>
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| 25 |
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| 26 | #include <drm/drm_atomic.h>
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| 27 | #include <drm/drm_atomic_uapi.h>
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| 28 | #include <drm/drm_auth.h>
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| 29 | #include <drm/drm_debugfs.h>
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| 30 | #include <drm/drm_drv.h>
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| 31 | #include <drm/drm_file.h>
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| 32 | #include <drm/drm_fourcc.h>
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| 33 | #include <drm/drm_framebuffer.h>
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| 34 | #include <drm/drm_gem.h>
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| 35 | #include <drm/drm_print.h>
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| 36 | #include <drm/drm_util.h>
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| 37 |
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| 38 | #include "drm_crtc_internal.h"
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| 39 | #include "drm_internal.h"
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| 40 |
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| 41 | |
| 42 | * DOC: overview
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| 43 | *
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| 44 | * Frame buffers are abstract memory objects that provide a source of pixels to
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| 45 | * scanout to a CRTC. Applications explicitly request the creation of frame
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| 46 | * buffers through the DRM_IOCTL_MODE_ADDFB(2) ioctls and receive an opaque
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| 47 | * handle that can be passed to the KMS CRTC control, plane configuration and
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| 48 | * page flip functions.
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| 49 | *
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| 50 | * Frame buffers rely on the underlying memory manager for allocating backing
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| 51 | * storage. When creating a frame buffer applications pass a memory handle
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| 52 | * (or a list of memory handles for multi-planar formats) through the
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| 53 | * &struct drm_mode_fb_cmd2 argument. For drivers using GEM as their userspace
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| 54 | * buffer management interface this would be a GEM handle. Drivers are however
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| 55 | * free to use their own backing storage object handles, e.g. vmwgfx directly
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| 56 | * exposes special TTM handles to userspace and so expects TTM handles in the
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| 57 | * create ioctl and not GEM handles.
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| 58 | *
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| 59 | * Framebuffers are tracked with &struct drm_framebuffer. They are published
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| 60 | * using drm_framebuffer_init() - after calling that function userspace can use
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| 61 | * and access the framebuffer object. The helper function
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| 62 | * drm_helper_mode_fill_fb_struct() can be used to pre-fill the required
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| 63 | * metadata fields.
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| 64 | *
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| 65 | * The lifetime of a drm framebuffer is controlled with a reference count,
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| 66 | * drivers can grab additional references with drm_framebuffer_get() and drop
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| 67 | * them again with drm_framebuffer_put(). For driver-private framebuffers for
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| 68 | * which the last reference is never dropped (e.g. for the fbdev framebuffer
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| 69 | * when the struct &struct drm_framebuffer is embedded into the fbdev helper
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| 70 | * struct) drivers can manually clean up a framebuffer at module unload time
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| 71 | * with drm_framebuffer_unregister_private(). But doing this is not
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| 72 | * recommended, and it's better to have a normal free-standing &struct
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| 73 | * drm_framebuffer.
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| 74 |
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| 75 |
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| 76 | int drm_framebuffer_check_src_coords(uint32_t src_x, uint32_t src_y,
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| 77 | uint32_t src_w, uint32_t src_h,
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| 78 | const struct drm_framebuffer *fb)
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| 79 | {
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| 80 | unsigned int fb_width, fb_height;
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| 81 |
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| 82 | fb_width = fb->width << 16;
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| 83 | fb_height = fb->height << 16;
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| 84 |
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| 85 |
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| 86 | if (src_w > fb_width ||
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| 87 | src_x > fb_width - src_w ||
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| 88 | src_h > fb_height ||
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| 89 | src_y > fb_height - src_h) {
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| 90 | drm_dbg_kms(fb->dev, "Invalid source coordinates "
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| 91 | "%u.%06ux%u.%06u+%u.%06u+%u.%06u (fb %ux%u)\n",
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| 92 | src_w >> 16, ((src_w & 0xffff) * 15625) >> 10,
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| 93 | src_h >> 16, ((src_h & 0xffff) * 15625) >> 10,
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| 94 | src_x >> 16, ((src_x & 0xffff) * 15625) >> 10,
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| 95 | src_y >> 16, ((src_y & 0xffff) * 15625) >> 10,
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| 96 | fb->width, fb->height);
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| 97 | return -ENOSPC;
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| 98 | }
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| 99 |
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| 100 | return 0;
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| 101 | }
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| 102 | EXPORT_SYMBOL_FOR_TESTS_ONLY(drm_framebuffer_check_src_coords);
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| 103 |
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| 104 | |
| 105 | * drm_mode_addfb - add an FB to the graphics configuration
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| 106 | * @dev: drm device for the ioctl
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| 107 | * @or: pointer to request structure
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| 108 | * @file_priv: drm file
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| 109 | *
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| 110 | * Add a new FB to the specified CRTC, given a user request. This is the
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| 111 | * original addfb ioctl which only supported RGB formats.
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| 112 | *
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| 113 | * Called by the user via ioctl, or by an in-kernel client.
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| 114 | *
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| 115 | * Returns:
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| 116 | * Zero on success, negative errno on failure.
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| 117 |
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| 118 | int drm_mode_addfb(struct drm_device *dev, struct drm_mode_fb_cmd *or,
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| 119 | struct drm_file *file_priv)
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| 120 | {
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| 121 | struct drm_mode_fb_cmd2 r = {};
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| 122 | int ret;
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| 123 |
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| 124 | if (!drm_core_check_feature(dev, DRIVER_MODESET))
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| 125 | return -EOPNOTSUPP;
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| 126 |
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| 127 | r.pixel_format = drm_driver_legacy_fb_format(dev, or->bpp, or->depth);
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| 128 | if (r.pixel_format == DRM_FORMAT_INVALID) {
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| 129 | drm_dbg_kms(dev, "bad {bpp:%d, depth:%d}\n", or->bpp, or->depth);
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| 130 | return -EINVAL;
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| 131 | }
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| 132 |
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| 133 |
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| 134 | r.fb_id = or->fb_id;
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| 135 | r.width = or->width;
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| 136 | r.height = or->height;
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| 137 | r.pitches[0] = or->pitch;
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| 138 | r.handles[0] = or->handle;
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| 139 |
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| 140 | ret = drm_mode_addfb2(dev, &r, file_priv);
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| 141 | if (ret)
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| 142 | return ret;
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| 143 |
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| 144 | or->fb_id = r.fb_id;
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| 145 |
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| 146 | return 0;
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| 147 | }
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| 148 |
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| 149 | int drm_mode_addfb_ioctl(struct drm_device *dev,
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| 150 | void *data, struct drm_file *file_priv)
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| 151 | {
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| 152 | return drm_mode_addfb(dev, data, file_priv);
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| 153 | }
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| 154 |
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| 155 | static int framebuffer_check(struct drm_device *dev,
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| 156 | const struct drm_format_info *info,
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| 157 | const struct drm_mode_fb_cmd2 *r)
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| 158 | {
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| 159 | int i;
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| 160 |
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| 161 | if (r->width == 0) {
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| 162 | drm_dbg_kms(dev, "bad framebuffer width %u\n", r->width);
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| 163 | return -EINVAL;
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| 164 | }
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| 165 |
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| 166 | if (r->height == 0) {
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| 167 | drm_dbg_kms(dev, "bad framebuffer height %u\n", r->height);
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| 168 | return -EINVAL;
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| 169 | }
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| 170 |
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| 171 | for (i = 0; i < info->num_planes; i++) {
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| 172 | unsigned int width = drm_format_info_plane_width(info, r->width, i);
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| 173 | unsigned int height = drm_format_info_plane_height(info, r->height, i);
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| 174 | unsigned int block_size = info->char_per_block[i];
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| 175 | u64 min_pitch = drm_format_info_min_pitch(info, i, width);
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| 176 |
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| 177 | if (!block_size && (r->modifier[i] == DRM_FORMAT_MOD_LINEAR)) {
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| 178 | drm_dbg_kms(dev, "Format requires non-linear modifier for plane %d\n", i);
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| 179 | return -EINVAL;
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| 180 | }
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| 181 |
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| 182 | if (!r->handles[i]) {
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| 183 | drm_dbg_kms(dev, "no buffer object handle for plane %d\n", i);
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| 184 | return -EINVAL;
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| 185 | }
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| 186 |
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| 187 | if (min_pitch > UINT_MAX)
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| 188 | return -ERANGE;
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| 189 |
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| 190 | if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX)
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| 191 | return -ERANGE;
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| 192 |
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| 193 | if (block_size && r->pitches[i] < min_pitch) {
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| 194 | drm_dbg_kms(dev, "bad pitch %u for plane %d\n", r->pitches[i], i);
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| 195 | return -EINVAL;
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| 196 | }
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| 197 |
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| 198 | if (r->modifier[i] && !(r->flags & DRM_MODE_FB_MODIFIERS)) {
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| 199 | drm_dbg_kms(dev, "bad fb modifier %llu for plane %d\n",
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| 200 | r->modifier[i], i);
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| 201 | return -EINVAL;
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| 202 | }
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| 203 |
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| 204 | if (r->flags & DRM_MODE_FB_MODIFIERS &&
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| 205 | r->modifier[i] != r->modifier[0]) {
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| 206 | drm_dbg_kms(dev, "bad fb modifier %llu for plane %d\n",
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| 207 | r->modifier[i], i);
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| 208 | return -EINVAL;
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| 209 | }
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| 210 |
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| 211 |
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| 212 | switch (r->modifier[i]) {
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| 213 | case DRM_FORMAT_MOD_SAMSUNG_64_32_TILE:
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| 214 | |
| 215 | * out that no hw has this restriction:
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| 216 |
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| 217 | if (r->pixel_format != DRM_FORMAT_NV12 ||
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| 218 | width % 128 || height % 32 ||
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| 219 | r->pitches[i] % 128) {
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| 220 | drm_dbg_kms(dev, "bad modifier data for plane %d\n", i);
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| 221 | return -EINVAL;
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| 222 | }
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| 223 | break;
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| 224 |
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| 225 | default:
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| 226 | break;
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| 227 | }
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| 228 | }
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| 229 |
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| 230 | for (i = info->num_planes; i < 4; i++) {
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| 231 | if (r->modifier[i]) {
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| 232 | drm_dbg_kms(dev, "non-zero modifier for unused plane %d\n", i);
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| 233 | return -EINVAL;
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| 234 | }
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| 235 |
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| 236 |
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| 237 | if (!(r->flags & DRM_MODE_FB_MODIFIERS))
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| 238 | continue;
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| 239 |
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| 240 | if (r->handles[i]) {
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| 241 | drm_dbg_kms(dev, "buffer object handle for unused plane %d\n", i);
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| 242 | return -EINVAL;
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| 243 | }
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| 244 |
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| 245 | if (r->pitches[i]) {
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| 246 | drm_dbg_kms(dev, "non-zero pitch for unused plane %d\n", i);
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| 247 | return -EINVAL;
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| 248 | }
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| 249 |
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| 250 | if (r->offsets[i]) {
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| 251 | drm_dbg_kms(dev, "non-zero offset for unused plane %d\n", i);
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| 252 | return -EINVAL;
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| 253 | }
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| 254 | }
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| 255 |
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| 256 | return 0;
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| 257 | }
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| 258 |
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| 259 | struct drm_framebuffer *
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| 260 | drm_internal_framebuffer_create(struct drm_device *dev,
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| 261 | const struct drm_mode_fb_cmd2 *r,
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| 262 | struct drm_file *file_priv)
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| 263 | {
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| 264 | struct drm_mode_config *config = &dev->mode_config;
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| 265 | const struct drm_format_info *info;
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| 266 | struct drm_framebuffer *fb;
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| 267 | int ret;
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| 268 |
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| 269 | if (r->flags & ~(DRM_MODE_FB_INTERLACED | DRM_MODE_FB_MODIFIERS)) {
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| 270 | drm_dbg_kms(dev, "bad framebuffer flags 0x%08x\n", r->flags);
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| 271 | return ERR_PTR(-EINVAL);
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| 272 | }
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| 273 |
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| 274 | if ((config->min_width > r->width) || (r->width > config->max_width)) {
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| 275 | drm_dbg_kms(dev, "bad framebuffer width %d, should be >= %d && <= %d\n",
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| 276 | r->width, config->min_width, config->max_width);
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| 277 | return ERR_PTR(-EINVAL);
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| 278 | }
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| 279 | if ((config->min_height > r->height) || (r->height > config->max_height)) {
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| 280 | drm_dbg_kms(dev, "bad framebuffer height %d, should be >= %d && <= %d\n",
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| 281 | r->height, config->min_height, config->max_height);
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| 282 | return ERR_PTR(-EINVAL);
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| 283 | }
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| 284 |
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| 285 | if (r->flags & DRM_MODE_FB_MODIFIERS &&
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| 286 | dev->mode_config.fb_modifiers_not_supported) {
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| 287 | drm_dbg_kms(dev, "driver does not support fb modifiers\n");
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| 288 | return ERR_PTR(-EINVAL);
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| 289 | }
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| 290 |
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| 291 |
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| 292 | if (!__drm_format_info(r->pixel_format)) {
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| 293 | drm_dbg_kms(dev, "bad framebuffer format %p4cc\n",
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| 294 | &r->pixel_format);
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| 295 | return ERR_PTR(-EINVAL);
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| 296 | }
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| 297 |
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| 298 |
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| 299 | info = drm_get_format_info(dev, r->pixel_format, r->modifier[0]);
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| 300 |
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| 301 | ret = framebuffer_check(dev, info, r);
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| 302 | if (ret)
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| 303 | return ERR_PTR(ret);
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| 304 |
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| 305 | fb = dev->mode_config.funcs->fb_create(dev, file_priv, info, r);
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| 306 | if (IS_ERR(fb)) {
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| 307 | drm_dbg_kms(dev, "could not create framebuffer\n");
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| 308 | return fb;
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| 309 | }
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| 310 |
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| 311 | return fb;
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| 312 | }
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| 313 | EXPORT_SYMBOL_FOR_TESTS_ONLY(drm_internal_framebuffer_create);
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| 314 |
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| 315 | |
| 316 | * drm_mode_addfb2 - add an FB to the graphics configuration
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| 317 | * @dev: drm device for the ioctl
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| 318 | * @data: data pointer for the ioctl
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| 319 | * @file_priv: drm file for the ioctl call
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| 320 | *
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| 321 | * Add a new FB to the specified CRTC, given a user request with format. This is
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| 322 | * the 2nd version of the addfb ioctl, which supports multi-planar framebuffers
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| 323 | * and uses fourcc codes as pixel format specifiers.
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| 324 | *
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| 325 | * Called by the user via ioctl.
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| 326 | *
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| 327 | * Returns:
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| 328 | * Zero on success, negative errno on failure.
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| 329 |
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| 330 | int drm_mode_addfb2(struct drm_device *dev,
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| 331 | void *data, struct drm_file *file_priv)
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| 332 | {
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| 333 | struct drm_mode_fb_cmd2 *r = data;
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| 334 | struct drm_framebuffer *fb;
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| 335 |
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| 336 | if (!drm_core_check_feature(dev, DRIVER_MODESET))
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| 337 | return -EOPNOTSUPP;
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| 338 |
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| 339 | fb = drm_internal_framebuffer_create(dev, r, file_priv);
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| 340 | if (IS_ERR(fb))
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| 341 | return PTR_ERR(fb);
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| 342 |
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| 343 | drm_dbg_kms(dev, "[FB:%d]\n", fb->base.id);
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| 344 | r->fb_id = fb->base.id;
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| 345 |
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| 346 |
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| 347 | mutex_lock(&file_priv->fbs_lock);
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| 348 | list_add(&fb->filp_head, &file_priv->fbs);
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| 349 | mutex_unlock(&file_priv->fbs_lock);
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| 350 |
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| 351 | return 0;
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| 352 | }
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| 353 |
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| 354 | int drm_mode_addfb2_ioctl(struct drm_device *dev,
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| 355 | void *data, struct drm_file *file_priv)
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| 356 | {
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| 357 | #ifdef __BIG_ENDIAN
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| 358 | if (!dev->mode_config.quirk_addfb_prefer_host_byte_order) {
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| 359 | |
| 360 | * Drivers must set the
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| 361 | * quirk_addfb_prefer_host_byte_order quirk to make
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| 362 | * the drm_mode_addfb() compat code work correctly on
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| 363 | * bigendian machines.
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| 364 | *
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| 365 | * If they don't they interpret pixel_format values
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| 366 | * incorrectly for bug compatibility, which in turn
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| 367 | * implies the ADDFB2 ioctl does not work correctly
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| 368 | * then. So block it to make userspace fallback to
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| 369 | * ADDFB.
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| 370 |
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| 371 | drm_dbg_kms(dev, "addfb2 broken on bigendian");
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| 372 | return -EOPNOTSUPP;
|
| 373 | }
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| 374 | #endif
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| 375 | return drm_mode_addfb2(dev, data, file_priv);
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| 376 | }
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| 377 |
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| 378 | struct drm_mode_rmfb_work {
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| 379 | struct work_struct work;
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| 380 | struct list_head fbs;
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| 381 | };
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| 382 |
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| 383 | static void drm_mode_rmfb_work_fn(struct work_struct *w)
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| 384 | {
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| 385 | struct drm_mode_rmfb_work *arg = container_of(w, typeof(*arg), work);
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| 386 |
|
| 387 | while (!list_empty(&arg->fbs)) {
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| 388 | struct drm_framebuffer *fb =
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| 389 | list_first_entry(&arg->fbs, typeof(*fb), filp_head);
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| 390 |
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| 391 | drm_dbg_kms(fb->dev,
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| 392 | "Removing [FB:%d] from all active usage due to RMFB ioctl\n",
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| 393 | fb->base.id);
|
| 394 | list_del_init(&fb->filp_head);
|
| 395 | drm_framebuffer_remove(fb);
|
| 396 | }
|
| 397 | }
|
| 398 |
|
| 399 | static int drm_mode_closefb(struct drm_framebuffer *fb,
|
| 400 | struct drm_file *file_priv)
|
| 401 | {
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| 402 | struct drm_framebuffer *fbl;
|
| 403 | bool found = false;
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| 404 |
|
| 405 | mutex_lock(&file_priv->fbs_lock);
|
| 406 | list_for_each_entry(fbl, &file_priv->fbs, filp_head)
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| 407 | if (fb == fbl)
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| 408 | found = true;
|
| 409 |
|
| 410 | if (!found) {
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| 411 | mutex_unlock(&file_priv->fbs_lock);
|
| 412 | return -ENOENT;
|
| 413 | }
|
| 414 |
|
| 415 | list_del_init(&fb->filp_head);
|
| 416 | mutex_unlock(&file_priv->fbs_lock);
|
| 417 |
|
| 418 |
|
| 419 | drm_framebuffer_put(fb);
|
| 420 |
|
| 421 | return 0;
|
| 422 | }
|
| 423 |
|
| 424 | |
| 425 | * drm_mode_rmfb - remove an FB from the configuration
|
| 426 | * @dev: drm device
|
| 427 | * @fb_id: id of framebuffer to remove
|
| 428 | * @file_priv: drm file
|
| 429 | *
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| 430 | * Remove the specified FB.
|
| 431 | *
|
| 432 | * Called by the user via ioctl, or by an in-kernel client.
|
| 433 | *
|
| 434 | * Returns:
|
| 435 | * Zero on success, negative errno on failure.
|
| 436 |
|
| 437 | int drm_mode_rmfb(struct drm_device *dev, u32 fb_id,
|
| 438 | struct drm_file *file_priv)
|
| 439 | {
|
| 440 | struct drm_framebuffer *fb;
|
| 441 | int ret;
|
| 442 |
|
| 443 | if (!drm_core_check_feature(dev, DRIVER_MODESET))
|
| 444 | return -EOPNOTSUPP;
|
| 445 |
|
| 446 | fb = drm_framebuffer_lookup(dev, file_priv, fb_id);
|
| 447 | if (!fb)
|
| 448 | return -ENOENT;
|
| 449 |
|
| 450 | ret = drm_mode_closefb(fb, file_priv);
|
| 451 | if (ret != 0) {
|
| 452 | drm_framebuffer_put(fb);
|
| 453 | return ret;
|
| 454 | }
|
| 455 |
|
| 456 | |
| 457 | * drm_framebuffer_remove may fail with -EINTR on pending signals,
|
| 458 | * so run this in a separate stack as there's no way to correctly
|
| 459 | * handle this after the fb is already removed from the lookup table.
|
| 460 |
|
| 461 | if (drm_framebuffer_read_refcount(fb) > 1) {
|
| 462 | struct drm_mode_rmfb_work arg;
|
| 463 |
|
| 464 | INIT_WORK_ONSTACK(&arg.work, drm_mode_rmfb_work_fn);
|
| 465 | INIT_LIST_HEAD(&arg.fbs);
|
| 466 | drm_WARN_ON(dev, !list_empty(&fb->filp_head));
|
| 467 | list_add_tail(&fb->filp_head, &arg.fbs);
|
| 468 |
|
| 469 | schedule_work(&arg.work);
|
| 470 | flush_work(&arg.work);
|
| 471 | destroy_work_on_stack(&arg.work);
|
| 472 | } else
|
| 473 | drm_framebuffer_put(fb);
|
| 474 |
|
| 475 | return 0;
|
| 476 | }
|
| 477 |
|
| 478 | int drm_mode_rmfb_ioctl(struct drm_device *dev,
|
| 479 | void *data, struct drm_file *file_priv)
|
| 480 | {
|
| 481 | uint32_t *fb_id = data;
|
| 482 |
|
| 483 | return drm_mode_rmfb(dev, *fb_id, file_priv);
|
| 484 | }
|
| 485 |
|
| 486 | int drm_mode_closefb_ioctl(struct drm_device *dev,
|
| 487 | void *data, struct drm_file *file_priv)
|
| 488 | {
|
| 489 | struct drm_mode_closefb *r = data;
|
| 490 | struct drm_framebuffer *fb;
|
| 491 | int ret;
|
| 492 |
|
| 493 | if (!drm_core_check_feature(dev, DRIVER_MODESET))
|
| 494 | return -EOPNOTSUPP;
|
| 495 |
|
| 496 | if (r->pad)
|
| 497 | return -EINVAL;
|
| 498 |
|
| 499 | fb = drm_framebuffer_lookup(dev, file_priv, r->fb_id);
|
| 500 | if (!fb)
|
| 501 | return -ENOENT;
|
| 502 |
|
| 503 | ret = drm_mode_closefb(fb, file_priv);
|
| 504 | drm_framebuffer_put(fb);
|
| 505 | return ret;
|
| 506 | }
|
| 507 |
|
| 508 | |
| 509 | * drm_mode_getfb - get FB info
|
| 510 | * @dev: drm device for the ioctl
|
| 511 | * @data: data pointer for the ioctl
|
| 512 | * @file_priv: drm file for the ioctl call
|
| 513 | *
|
| 514 | * Lookup the FB given its ID and return info about it.
|
| 515 | *
|
| 516 | * Called by the user via ioctl.
|
| 517 | *
|
| 518 | * Returns:
|
| 519 | * Zero on success, negative errno on failure.
|
| 520 |
|
| 521 | int drm_mode_getfb(struct drm_device *dev,
|
| 522 | void *data, struct drm_file *file_priv)
|
| 523 | {
|
| 524 | struct drm_mode_fb_cmd *r = data;
|
| 525 | struct drm_framebuffer *fb;
|
| 526 | int ret;
|
| 527 |
|
| 528 | if (!drm_core_check_feature(dev, DRIVER_MODESET))
|
| 529 | return -EOPNOTSUPP;
|
| 530 |
|
| 531 | fb = drm_framebuffer_lookup(dev, file_priv, r->fb_id);
|
| 532 | if (!fb)
|
| 533 | return -ENOENT;
|
| 534 |
|
| 535 |
|
| 536 | if (fb->format->num_planes > 1) {
|
| 537 | ret = -EINVAL;
|
| 538 | goto out;
|
| 539 | }
|
| 540 |
|
| 541 | if (!fb->funcs->create_handle) {
|
| 542 | ret = -ENODEV;
|
| 543 | goto out;
|
| 544 | }
|
| 545 |
|
| 546 | r->height = fb->height;
|
| 547 | r->width = fb->width;
|
| 548 | r->depth = fb->format->depth;
|
| 549 | r->bpp = drm_format_info_bpp(fb->format, 0);
|
| 550 | r->pitch = fb->pitches[0];
|
| 551 |
|
| 552 | |
| 553 | * buffer-handle to non-master processes! For
|
| 554 | * backwards-compatibility reasons, we cannot make GET_FB() privileged,
|
| 555 | * so just return an invalid handle for non-masters.
|
| 556 |
|
| 557 | if (!drm_is_current_master(file_priv) && !capable(CAP_SYS_ADMIN)) {
|
| 558 | r->handle = 0;
|
| 559 | ret = 0;
|
| 560 | goto out;
|
| 561 | }
|
| 562 |
|
| 563 | ret = fb->funcs->create_handle(fb, file_priv, &r->handle);
|
| 564 |
|
| 565 | out:
|
| 566 | drm_framebuffer_put(fb);
|
| 567 | return ret;
|
| 568 | }
|
| 569 |
|
| 570 | |
| 571 | * drm_mode_getfb2_ioctl - get extended FB info
|
| 572 | * @dev: drm device for the ioctl
|
| 573 | * @data: data pointer for the ioctl
|
| 574 | * @file_priv: drm file for the ioctl call
|
| 575 | *
|
| 576 | * Lookup the FB given its ID and return info about it.
|
| 577 | *
|
| 578 | * Called by the user via ioctl.
|
| 579 | *
|
| 580 | * Returns:
|
| 581 | * Zero on success, negative errno on failure.
|
| 582 |
|
| 583 | int drm_mode_getfb2_ioctl(struct drm_device *dev,
|
| 584 | void *data, struct drm_file *file_priv)
|
| 585 | {
|
| 586 | struct drm_mode_fb_cmd2 *r = data;
|
| 587 | struct drm_framebuffer *fb;
|
| 588 | unsigned int i;
|
| 589 | int ret = 0;
|
| 590 |
|
| 591 | if (!drm_core_check_feature(dev, DRIVER_MODESET))
|
| 592 | return -EINVAL;
|
| 593 |
|
| 594 | fb = drm_framebuffer_lookup(dev, file_priv, r->fb_id);
|
| 595 | if (!fb)
|
| 596 | return -ENOENT;
|
| 597 |
|
| 598 | |
| 599 | * GEM objects directly in the drm_framebuffer. For single-plane
|
| 600 | * framebuffers, we can fall back to create_handle.
|
| 601 |
|
| 602 | if (!fb->obj[0] &&
|
| 603 | (fb->format->num_planes > 1 || !fb->funcs->create_handle)) {
|
| 604 | ret = -ENODEV;
|
| 605 | goto out;
|
| 606 | }
|
| 607 |
|
| 608 | r->height = fb->height;
|
| 609 | r->width = fb->width;
|
| 610 | r->pixel_format = fb->format->format;
|
| 611 |
|
| 612 | r->flags = 0;
|
| 613 | if (!dev->mode_config.fb_modifiers_not_supported)
|
| 614 | r->flags |= DRM_MODE_FB_MODIFIERS;
|
| 615 |
|
| 616 | for (i = 0; i < ARRAY_SIZE(r->handles); i++) {
|
| 617 | r->handles[i] = 0;
|
| 618 | r->pitches[i] = 0;
|
| 619 | r->offsets[i] = 0;
|
| 620 | r->modifier[i] = 0;
|
| 621 | }
|
| 622 |
|
| 623 | for (i = 0; i < fb->format->num_planes; i++) {
|
| 624 | r->pitches[i] = fb->pitches[i];
|
| 625 | r->offsets[i] = fb->offsets[i];
|
| 626 | if (!dev->mode_config.fb_modifiers_not_supported)
|
| 627 | r->modifier[i] = fb->modifier;
|
| 628 | }
|
| 629 |
|
| 630 | |
| 631 | * buffer-handle to non master/root processes! To match GET_FB()
|
| 632 | * just return invalid handles (0) for non masters/root
|
| 633 | * rather than making GET_FB2() privileged.
|
| 634 |
|
| 635 | if (!drm_is_current_master(file_priv) && !capable(CAP_SYS_ADMIN)) {
|
| 636 | ret = 0;
|
| 637 | goto out;
|
| 638 | }
|
| 639 |
|
| 640 | for (i = 0; i < fb->format->num_planes; i++) {
|
| 641 | int j;
|
| 642 |
|
| 643 | |
| 644 | * return the same handle.
|
| 645 |
|
| 646 | for (j = 0; j < i; j++) {
|
| 647 | if (fb->obj[i] == fb->obj[j]) {
|
| 648 | r->handles[i] = r->handles[j];
|
| 649 | break;
|
| 650 | }
|
| 651 | }
|
| 652 |
|
| 653 | if (r->handles[i])
|
| 654 | continue;
|
| 655 |
|
| 656 | if (fb->obj[i]) {
|
| 657 | ret = drm_gem_handle_create(file_priv, fb->obj[i],
|
| 658 | &r->handles[i]);
|
| 659 | } else {
|
| 660 | WARN_ON(i > 0);
|
| 661 | ret = fb->funcs->create_handle(fb, file_priv,
|
| 662 | &r->handles[i]);
|
| 663 | }
|
| 664 |
|
| 665 | if (ret != 0)
|
| 666 | goto out;
|
| 667 | }
|
| 668 |
|
| 669 | out:
|
| 670 | if (ret != 0) {
|
| 671 |
|
| 672 | for (i = 0; i < ARRAY_SIZE(r->handles); i++) {
|
| 673 | int j;
|
| 674 |
|
| 675 | if (r->handles[i])
|
| 676 | drm_gem_handle_delete(file_priv, r->handles[i]);
|
| 677 |
|
| 678 | |
| 679 | * deleted.
|
| 680 |
|
| 681 | for (j = i + 1; j < ARRAY_SIZE(r->handles); j++) {
|
| 682 | if (r->handles[j] == r->handles[i])
|
| 683 | r->handles[j] = 0;
|
| 684 | }
|
| 685 | }
|
| 686 | }
|
| 687 |
|
| 688 | drm_framebuffer_put(fb);
|
| 689 | return ret;
|
| 690 | }
|
| 691 |
|
| 692 | |
| 693 | * drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB
|
| 694 | * @dev: drm device for the ioctl
|
| 695 | * @data: data pointer for the ioctl
|
| 696 | * @file_priv: drm file for the ioctl call
|
| 697 | *
|
| 698 | * Lookup the FB and flush out the damaged area supplied by userspace as a clip
|
| 699 | * rectangle list. Generic userspace which does frontbuffer rendering must call
|
| 700 | * this ioctl to flush out the changes on manual-update display outputs, e.g.
|
| 701 | * usb display-link, mipi manual update panels or edp panel self refresh modes.
|
| 702 | *
|
| 703 | * Modesetting drivers which always update the frontbuffer do not need to
|
| 704 | * implement the corresponding &drm_framebuffer_funcs.dirty callback.
|
| 705 | *
|
| 706 | * Called by the user via ioctl.
|
| 707 | *
|
| 708 | * Returns:
|
| 709 | * Zero on success, negative errno on failure.
|
| 710 |
|
| 711 | int drm_mode_dirtyfb_ioctl(struct drm_device *dev,
|
| 712 | void *data, struct drm_file *file_priv)
|
| 713 | {
|
| 714 | struct drm_clip_rect __user *clips_ptr;
|
| 715 | struct drm_clip_rect *clips = NULL;
|
| 716 | struct drm_mode_fb_dirty_cmd *r = data;
|
| 717 | struct drm_framebuffer *fb;
|
| 718 | unsigned flags;
|
| 719 | int num_clips;
|
| 720 | int ret;
|
| 721 |
|
| 722 | if (!drm_core_check_feature(dev, DRIVER_MODESET))
|
| 723 | return -EOPNOTSUPP;
|
| 724 |
|
| 725 | fb = drm_framebuffer_lookup(dev, file_priv, r->fb_id);
|
| 726 | if (!fb)
|
| 727 | return -ENOENT;
|
| 728 |
|
| 729 | num_clips = r->num_clips;
|
| 730 | clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr;
|
| 731 |
|
| 732 | if (!num_clips != !clips_ptr) {
|
| 733 | ret = -EINVAL;
|
| 734 | goto out_err1;
|
| 735 | }
|
| 736 |
|
| 737 | flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags;
|
| 738 |
|
| 739 |
|
| 740 | if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) {
|
| 741 | ret = -EINVAL;
|
| 742 | goto out_err1;
|
| 743 | }
|
| 744 |
|
| 745 | if (num_clips && clips_ptr) {
|
| 746 | if (num_clips < 0 || num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) {
|
| 747 | ret = -EINVAL;
|
| 748 | goto out_err1;
|
| 749 | }
|
| 750 | clips = kzalloc_objs(*clips, num_clips);
|
| 751 | if (!clips) {
|
| 752 | ret = -ENOMEM;
|
| 753 | goto out_err1;
|
| 754 | }
|
| 755 |
|
| 756 | ret = copy_from_user(clips, clips_ptr,
|
| 757 | num_clips * sizeof(*clips));
|
| 758 | if (ret) {
|
| 759 | ret = -EFAULT;
|
| 760 | goto out_err2;
|
| 761 | }
|
| 762 | }
|
| 763 |
|
| 764 | if (fb->funcs->dirty) {
|
| 765 | ret = fb->funcs->dirty(fb, file_priv, flags, r->color,
|
| 766 | clips, num_clips);
|
| 767 | } else {
|
| 768 | ret = -ENOSYS;
|
| 769 | }
|
| 770 |
|
| 771 | out_err2:
|
| 772 | kfree(clips);
|
| 773 | out_err1:
|
| 774 | drm_framebuffer_put(fb);
|
| 775 |
|
| 776 | return ret;
|
| 777 | }
|
| 778 |
|
| 779 | |
| 780 | * drm_fb_release - remove and free the FBs on this file
|
| 781 | * @priv: drm file for the ioctl
|
| 782 | *
|
| 783 | * Destroy all the FBs associated with @filp.
|
| 784 | *
|
| 785 | * Called by the user via ioctl.
|
| 786 | *
|
| 787 | * Returns:
|
| 788 | * Zero on success, negative errno on failure.
|
| 789 |
|
| 790 | void drm_fb_release(struct drm_file *priv)
|
| 791 | {
|
| 792 | struct drm_framebuffer *fb, *tfb;
|
| 793 | struct drm_mode_rmfb_work arg;
|
| 794 |
|
| 795 | INIT_LIST_HEAD(&arg.fbs);
|
| 796 |
|
| 797 | |
| 798 | * When the file gets released that means no one else can access the fb
|
| 799 | * list any more, so no need to grab fpriv->fbs_lock. And we need to
|
| 800 | * avoid upsetting lockdep since the universal cursor code adds a
|
| 801 | * framebuffer while holding mutex locks.
|
| 802 | *
|
| 803 | * Note that a real deadlock between fpriv->fbs_lock and the modeset
|
| 804 | * locks is impossible here since no one else but this function can get
|
| 805 | * at it any more.
|
| 806 |
|
| 807 | list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) {
|
| 808 | if (drm_framebuffer_read_refcount(fb) > 1) {
|
| 809 | list_move_tail(&fb->filp_head, &arg.fbs);
|
| 810 | } else {
|
| 811 | list_del_init(&fb->filp_head);
|
| 812 |
|
| 813 |
|
| 814 | drm_framebuffer_put(fb);
|
| 815 | }
|
| 816 | }
|
| 817 |
|
| 818 | if (!list_empty(&arg.fbs)) {
|
| 819 | INIT_WORK_ONSTACK(&arg.work, drm_mode_rmfb_work_fn);
|
| 820 |
|
| 821 | schedule_work(&arg.work);
|
| 822 | flush_work(&arg.work);
|
| 823 | destroy_work_on_stack(&arg.work);
|
| 824 | }
|
| 825 | }
|
| 826 |
|
| 827 | void drm_framebuffer_free(struct kref *kref)
|
| 828 | {
|
| 829 | struct drm_framebuffer *fb =
|
| 830 | container_of(kref, struct drm_framebuffer, base.refcount);
|
| 831 | struct drm_device *dev = fb->dev;
|
| 832 |
|
| 833 | drm_WARN_ON(dev, !list_empty(&fb->filp_head));
|
| 834 |
|
| 835 | |
| 836 | * The lookup idr holds a weak reference, which has not necessarily been
|
| 837 | * removed at this point. Check for that.
|
| 838 |
|
| 839 | drm_mode_object_unregister(dev, &fb->base);
|
| 840 |
|
| 841 | fb->funcs->destroy(fb);
|
| 842 | }
|
| 843 | EXPORT_SYMBOL_FOR_TESTS_ONLY(drm_framebuffer_free);
|
| 844 |
|
| 845 | |
| 846 | * drm_framebuffer_init - initialize a framebuffer
|
| 847 | * @dev: DRM device
|
| 848 | * @fb: framebuffer to be initialized
|
| 849 | * @funcs: ... with these functions
|
| 850 | *
|
| 851 | * Allocates an ID for the framebuffer's parent mode object, sets its mode
|
| 852 | * functions & device file and adds it to the master fd list.
|
| 853 | *
|
| 854 | * IMPORTANT:
|
| 855 | * This functions publishes the fb and makes it available for concurrent access
|
| 856 | * by other users. Which means by this point the fb _must_ be fully set up -
|
| 857 | * since all the fb attributes are invariant over its lifetime, no further
|
| 858 | * locking but only correct reference counting is required.
|
| 859 | *
|
| 860 | * Returns:
|
| 861 | * Zero on success, error code on failure.
|
| 862 |
|
| 863 | int drm_framebuffer_init(struct drm_device *dev, struct drm_framebuffer *fb,
|
| 864 | const struct drm_framebuffer_funcs *funcs)
|
| 865 | {
|
| 866 | unsigned int i;
|
| 867 | int ret;
|
| 868 | bool exists;
|
| 869 |
|
| 870 | if (WARN_ON_ONCE(fb->dev != dev || !fb->format))
|
| 871 | return -EINVAL;
|
| 872 |
|
| 873 | for (i = 0; i < fb->format->num_planes; i++) {
|
| 874 | if (drm_WARN_ON_ONCE(dev, fb->internal_flags & DRM_FRAMEBUFFER_HAS_HANDLE_REF(i)))
|
| 875 | fb->internal_flags &= ~DRM_FRAMEBUFFER_HAS_HANDLE_REF(i);
|
| 876 | if (fb->obj[i]) {
|
| 877 | exists = drm_gem_object_handle_get_if_exists_unlocked(fb->obj[i]);
|
| 878 | if (exists)
|
| 879 | fb->internal_flags |= DRM_FRAMEBUFFER_HAS_HANDLE_REF(i);
|
| 880 | }
|
| 881 | }
|
| 882 |
|
| 883 | INIT_LIST_HEAD(&fb->filp_head);
|
| 884 |
|
| 885 | fb->funcs = funcs;
|
| 886 | strscpy(fb->comm, current->comm);
|
| 887 |
|
| 888 | ret = __drm_mode_object_add(dev, &fb->base, DRM_MODE_OBJECT_FB,
|
| 889 | false, drm_framebuffer_free);
|
| 890 | if (ret)
|
| 891 | goto err;
|
| 892 |
|
| 893 | mutex_lock(&dev->mode_config.fb_lock);
|
| 894 | dev->mode_config.num_fb++;
|
| 895 | list_add(&fb->head, &dev->mode_config.fb_list);
|
| 896 | mutex_unlock(&dev->mode_config.fb_lock);
|
| 897 |
|
| 898 | drm_mode_object_register(dev, &fb->base);
|
| 899 |
|
| 900 | return 0;
|
| 901 |
|
| 902 | err:
|
| 903 | for (i = 0; i < fb->format->num_planes; i++) {
|
| 904 | if (fb->internal_flags & DRM_FRAMEBUFFER_HAS_HANDLE_REF(i)) {
|
| 905 | drm_gem_object_handle_put_unlocked(fb->obj[i]);
|
| 906 | fb->internal_flags &= ~DRM_FRAMEBUFFER_HAS_HANDLE_REF(i);
|
| 907 | }
|
| 908 | }
|
| 909 | return ret;
|
| 910 | }
|
| 911 | EXPORT_SYMBOL(drm_framebuffer_init);
|
| 912 |
|
| 913 | |
| 914 | * drm_framebuffer_lookup - look up a drm framebuffer and grab a reference
|
| 915 | * @dev: drm device
|
| 916 | * @file_priv: drm file to check for lease against.
|
| 917 | * @id: id of the fb object
|
| 918 | *
|
| 919 | * If successful, this grabs an additional reference to the framebuffer -
|
| 920 | * callers need to make sure to eventually unreference the returned framebuffer
|
| 921 | * again, using drm_framebuffer_put().
|
| 922 |
|
| 923 | struct drm_framebuffer *drm_framebuffer_lookup(struct drm_device *dev,
|
| 924 | struct drm_file *file_priv,
|
| 925 | uint32_t id)
|
| 926 | {
|
| 927 | struct drm_mode_object *obj;
|
| 928 | struct drm_framebuffer *fb = NULL;
|
| 929 |
|
| 930 | obj = __drm_mode_object_find(dev, file_priv, id, DRM_MODE_OBJECT_FB);
|
| 931 | if (obj)
|
| 932 | fb = obj_to_fb(obj);
|
| 933 | return fb;
|
| 934 | }
|
| 935 | EXPORT_SYMBOL(drm_framebuffer_lookup);
|
| 936 |
|
| 937 | |
| 938 | * drm_framebuffer_unregister_private - unregister a private fb from the lookup idr
|
| 939 | * @fb: fb to unregister
|
| 940 | *
|
| 941 | * Drivers need to call this when cleaning up driver-private framebuffers, e.g.
|
| 942 | * those used for fbdev. Note that the caller must hold a reference of its own,
|
| 943 | * i.e. the object may not be destroyed through this call (since it'll lead to a
|
| 944 | * locking inversion).
|
| 945 | *
|
| 946 | * NOTE: This function is deprecated. For driver-private framebuffers it is not
|
| 947 | * recommended to embed a framebuffer struct info fbdev struct, instead, a
|
| 948 | * framebuffer pointer is preferred and drm_framebuffer_put() should be called
|
| 949 | * when the framebuffer is to be cleaned up.
|
| 950 |
|
| 951 | void drm_framebuffer_unregister_private(struct drm_framebuffer *fb)
|
| 952 | {
|
| 953 | struct drm_device *dev;
|
| 954 |
|
| 955 | if (!fb)
|
| 956 | return;
|
| 957 |
|
| 958 | dev = fb->dev;
|
| 959 |
|
| 960 |
|
| 961 | drm_mode_object_unregister(dev, &fb->base);
|
| 962 | }
|
| 963 | EXPORT_SYMBOL(drm_framebuffer_unregister_private);
|
| 964 |
|
| 965 | |
| 966 | * drm_framebuffer_cleanup - remove a framebuffer object
|
| 967 | * @fb: framebuffer to remove
|
| 968 | *
|
| 969 | * Cleanup framebuffer. This function is intended to be used from the drivers
|
| 970 | * &drm_framebuffer_funcs.destroy callback. It can also be used to clean up
|
| 971 | * driver private framebuffers embedded into a larger structure.
|
| 972 | *
|
| 973 | * Note that this function does not remove the fb from active usage - if it is
|
| 974 | * still used anywhere, hilarity can ensue since userspace could call getfb on
|
| 975 | * the id and get back -EINVAL. Obviously no concern at driver unload time.
|
| 976 | *
|
| 977 | * Also, the framebuffer will not be removed from the lookup idr - for
|
| 978 | * user-created framebuffers this will happen in the rmfb ioctl. For
|
| 979 | * driver-private objects (e.g. for fbdev) drivers need to explicitly call
|
| 980 | * drm_framebuffer_unregister_private.
|
| 981 |
|
| 982 | void drm_framebuffer_cleanup(struct drm_framebuffer *fb)
|
| 983 | {
|
| 984 | struct drm_device *dev = fb->dev;
|
| 985 | unsigned int i;
|
| 986 |
|
| 987 | for (i = 0; i < fb->format->num_planes; i++) {
|
| 988 | if (fb->internal_flags & DRM_FRAMEBUFFER_HAS_HANDLE_REF(i))
|
| 989 | drm_gem_object_handle_put_unlocked(fb->obj[i]);
|
| 990 | }
|
| 991 |
|
| 992 | mutex_lock(&dev->mode_config.fb_lock);
|
| 993 | list_del(&fb->head);
|
| 994 | dev->mode_config.num_fb--;
|
| 995 | mutex_unlock(&dev->mode_config.fb_lock);
|
| 996 | }
|
| 997 | EXPORT_SYMBOL(drm_framebuffer_cleanup);
|
| 998 |
|
| 999 | static int atomic_remove_fb(struct drm_framebuffer *fb)
|
| 1000 | {
|
| 1001 | struct drm_modeset_acquire_ctx ctx;
|
| 1002 | struct drm_device *dev = fb->dev;
|
| 1003 | struct drm_atomic_commit *state;
|
| 1004 | struct drm_plane *plane;
|
| 1005 | struct drm_connector *conn __maybe_unused;
|
| 1006 | struct drm_connector_state *conn_state;
|
| 1007 | int i, ret;
|
| 1008 | unsigned plane_mask;
|
| 1009 | bool disable_crtcs = false;
|
| 1010 |
|
| 1011 | retry_disable:
|
| 1012 | drm_modeset_acquire_init(&ctx, 0);
|
| 1013 |
|
| 1014 | state = drm_atomic_commit_alloc(dev);
|
| 1015 | if (!state) {
|
| 1016 | ret = -ENOMEM;
|
| 1017 | goto out;
|
| 1018 | }
|
| 1019 | state->acquire_ctx = &ctx;
|
| 1020 |
|
| 1021 | retry:
|
| 1022 | plane_mask = 0;
|
| 1023 | ret = drm_modeset_lock_all_ctx(dev, &ctx);
|
| 1024 | if (ret)
|
| 1025 | goto unlock;
|
| 1026 |
|
| 1027 | drm_for_each_plane(plane, dev) {
|
| 1028 | struct drm_plane_state *plane_state;
|
| 1029 |
|
| 1030 | if (plane->state->fb != fb)
|
| 1031 | continue;
|
| 1032 |
|
| 1033 | drm_dbg_kms(dev,
|
| 1034 | "Disabling [PLANE:%d:%s] because [FB:%d] is removed\n",
|
| 1035 | plane->base.id, plane->name, fb->base.id);
|
| 1036 |
|
| 1037 | plane_state = drm_atomic_get_plane_state(state, plane);
|
| 1038 | if (IS_ERR(plane_state)) {
|
| 1039 | ret = PTR_ERR(plane_state);
|
| 1040 | goto unlock;
|
| 1041 | }
|
| 1042 |
|
| 1043 | if (disable_crtcs && plane_state->crtc->primary == plane) {
|
| 1044 | struct drm_crtc_state *crtc_state;
|
| 1045 |
|
| 1046 | drm_dbg_kms(dev,
|
| 1047 | "Disabling [CRTC:%d:%s] because [FB:%d] is removed\n",
|
| 1048 | plane_state->crtc->base.id,
|
| 1049 | plane_state->crtc->name, fb->base.id);
|
| 1050 |
|
| 1051 | crtc_state = drm_atomic_get_new_crtc_state(state, plane_state->crtc);
|
| 1052 |
|
| 1053 | ret = drm_atomic_add_affected_connectors(state, plane_state->crtc);
|
| 1054 | if (ret)
|
| 1055 | goto unlock;
|
| 1056 |
|
| 1057 | crtc_state->active = false;
|
| 1058 | ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL);
|
| 1059 | if (ret)
|
| 1060 | goto unlock;
|
| 1061 | }
|
| 1062 |
|
| 1063 | drm_atomic_set_fb_for_plane(plane_state, NULL);
|
| 1064 | ret = drm_atomic_set_crtc_for_plane(plane_state, NULL);
|
| 1065 | if (ret)
|
| 1066 | goto unlock;
|
| 1067 |
|
| 1068 | plane_mask |= drm_plane_mask(plane);
|
| 1069 | }
|
| 1070 |
|
| 1071 |
|
| 1072 | for_each_new_connector_in_state(state, conn, conn_state, i) {
|
| 1073 | ret = drm_atomic_set_crtc_for_connector(conn_state, NULL);
|
| 1074 |
|
| 1075 | if (ret)
|
| 1076 | goto unlock;
|
| 1077 | }
|
| 1078 |
|
| 1079 | if (plane_mask)
|
| 1080 | ret = drm_atomic_commit(state);
|
| 1081 |
|
| 1082 | unlock:
|
| 1083 | if (ret == -EDEADLK) {
|
| 1084 | drm_atomic_commit_clear(state);
|
| 1085 | drm_modeset_backoff(&ctx);
|
| 1086 | goto retry;
|
| 1087 | }
|
| 1088 |
|
| 1089 | drm_atomic_commit_put(state);
|
| 1090 |
|
| 1091 | out:
|
| 1092 | drm_modeset_drop_locks(&ctx);
|
| 1093 | drm_modeset_acquire_fini(&ctx);
|
| 1094 |
|
| 1095 | if (ret == -EINVAL && !disable_crtcs) {
|
| 1096 | disable_crtcs = true;
|
| 1097 | goto retry_disable;
|
| 1098 | }
|
| 1099 |
|
| 1100 | return ret;
|
| 1101 | }
|
| 1102 |
|
| 1103 | static void legacy_remove_fb(struct drm_framebuffer *fb)
|
| 1104 | {
|
| 1105 | struct drm_device *dev = fb->dev;
|
| 1106 | struct drm_crtc *crtc;
|
| 1107 | struct drm_plane *plane;
|
| 1108 |
|
| 1109 | drm_modeset_lock_all(dev);
|
| 1110 |
|
| 1111 | drm_for_each_crtc(crtc, dev) {
|
| 1112 | if (crtc->primary->fb == fb) {
|
| 1113 | drm_dbg_kms(dev,
|
| 1114 | "Disabling [CRTC:%d:%s] because [FB:%d] is removed\n",
|
| 1115 | crtc->base.id, crtc->name, fb->base.id);
|
| 1116 |
|
| 1117 |
|
| 1118 | if (drm_crtc_force_disable(crtc))
|
| 1119 | DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc);
|
| 1120 | }
|
| 1121 | }
|
| 1122 |
|
| 1123 | drm_for_each_plane(plane, dev) {
|
| 1124 | if (plane->fb == fb) {
|
| 1125 | drm_dbg_kms(dev,
|
| 1126 | "Disabling [PLANE:%d:%s] because [FB:%d] is removed\n",
|
| 1127 | plane->base.id, plane->name, fb->base.id);
|
| 1128 | drm_plane_force_disable(plane);
|
| 1129 | }
|
| 1130 | }
|
| 1131 | drm_modeset_unlock_all(dev);
|
| 1132 | }
|
| 1133 |
|
| 1134 | |
| 1135 | * drm_framebuffer_remove - remove and unreference a framebuffer object
|
| 1136 | * @fb: framebuffer to remove
|
| 1137 | *
|
| 1138 | * Scans all the CRTCs and planes in @dev's mode_config. If they're
|
| 1139 | * using @fb, removes it, setting it to NULL. Then drops the reference to the
|
| 1140 | * passed-in framebuffer. Might take the modeset locks.
|
| 1141 | *
|
| 1142 | * Note that this function optimizes the cleanup away if the caller holds the
|
| 1143 | * last reference to the framebuffer. It is also guaranteed to not take the
|
| 1144 | * modeset locks in this case.
|
| 1145 |
|
| 1146 | void drm_framebuffer_remove(struct drm_framebuffer *fb)
|
| 1147 | {
|
| 1148 | struct drm_device *dev;
|
| 1149 |
|
| 1150 | if (!fb)
|
| 1151 | return;
|
| 1152 |
|
| 1153 | dev = fb->dev;
|
| 1154 |
|
| 1155 | drm_WARN_ON(dev, !list_empty(&fb->filp_head));
|
| 1156 |
|
| 1157 | |
| 1158 | * drm ABI mandates that we remove any deleted framebuffers from active
|
| 1159 | * usage. But since most sane clients only remove framebuffers they no
|
| 1160 | * longer need, try to optimize this away.
|
| 1161 | *
|
| 1162 | * Since we're holding a reference ourselves, observing a refcount of 1
|
| 1163 | * means that we're the last holder and can skip it. Also, the refcount
|
| 1164 | * can never increase from 1 again, so we don't need any barriers or
|
| 1165 | * locks.
|
| 1166 | *
|
| 1167 | * Note that userspace could try to race with use and instate a new
|
| 1168 | * usage _after_ we've cleared all current ones. End result will be an
|
| 1169 | * in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot
|
| 1170 | * in this manner.
|
| 1171 |
|
| 1172 | if (drm_framebuffer_read_refcount(fb) > 1) {
|
| 1173 | if (drm_drv_uses_atomic_modeset(dev)) {
|
| 1174 | int ret = atomic_remove_fb(fb);
|
| 1175 |
|
| 1176 | WARN(ret, "atomic remove_fb failed with %i\n", ret);
|
| 1177 | } else
|
| 1178 | legacy_remove_fb(fb);
|
| 1179 | }
|
| 1180 |
|
| 1181 | drm_framebuffer_put(fb);
|
| 1182 | }
|
| 1183 | EXPORT_SYMBOL(drm_framebuffer_remove);
|
| 1184 |
|
| 1185 | void drm_framebuffer_print_info(struct drm_printer *p, unsigned int indent,
|
| 1186 | const struct drm_framebuffer *fb)
|
| 1187 | {
|
| 1188 | unsigned int i;
|
| 1189 |
|
| 1190 | drm_printf_indent(p, indent, "allocated by = %s\n", fb->comm);
|
| 1191 | drm_printf_indent(p, indent, "refcount=%u\n",
|
| 1192 | drm_framebuffer_read_refcount(fb));
|
| 1193 | drm_printf_indent(p, indent, "format=%p4cc\n", &fb->format->format);
|
| 1194 | drm_printf_indent(p, indent, "modifier=0x%llx\n", fb->modifier);
|
| 1195 | drm_printf_indent(p, indent, "size=%ux%u\n", fb->width, fb->height);
|
| 1196 | drm_printf_indent(p, indent, "layers:\n");
|
| 1197 |
|
| 1198 | for (i = 0; i < fb->format->num_planes; i++) {
|
| 1199 | drm_printf_indent(p, indent + 1, "size[%u]=%dx%d\n", i,
|
| 1200 | drm_format_info_plane_width(fb->format, fb->width, i),
|
| 1201 | drm_format_info_plane_height(fb->format, fb->height, i));
|
| 1202 | drm_printf_indent(p, indent + 1, "pitch[%u]=%u\n", i, fb->pitches[i]);
|
| 1203 | drm_printf_indent(p, indent + 1, "offset[%u]=%u\n", i, fb->offsets[i]);
|
| 1204 | drm_printf_indent(p, indent + 1, "obj[%u]:%s\n", i,
|
| 1205 | fb->obj[i] ? "" : "(null)");
|
| 1206 | if (fb->obj[i])
|
| 1207 | drm_gem_print_info(p, indent + 2, fb->obj[i]);
|
| 1208 | }
|
| 1209 | }
|
| 1210 |
|
| 1211 | #ifdef CONFIG_DEBUG_FS
|
| 1212 | static int drm_framebuffer_info(struct seq_file *m, void *data)
|
| 1213 | {
|
| 1214 | struct drm_debugfs_entry *entry = m->private;
|
| 1215 | struct drm_device *dev = entry->dev;
|
| 1216 | struct drm_printer p = drm_seq_file_printer(m);
|
| 1217 | struct drm_framebuffer *fb;
|
| 1218 |
|
| 1219 | mutex_lock(&dev->mode_config.fb_lock);
|
| 1220 | drm_for_each_fb(fb, dev) {
|
| 1221 | drm_printf(&p, "framebuffer[%u]:\n", fb->base.id);
|
| 1222 | drm_framebuffer_print_info(&p, 1, fb);
|
| 1223 | }
|
| 1224 | mutex_unlock(&dev->mode_config.fb_lock);
|
| 1225 |
|
| 1226 | return 0;
|
| 1227 | }
|
| 1228 |
|
| 1229 | static const struct drm_debugfs_info drm_framebuffer_debugfs_list[] = {
|
| 1230 | { "framebuffer", drm_framebuffer_info, 0 },
|
| 1231 | };
|
| 1232 |
|
| 1233 | void drm_framebuffer_debugfs_init(struct drm_device *dev)
|
| 1234 | {
|
| 1235 | drm_debugfs_add_files(dev, drm_framebuffer_debugfs_list,
|
| 1236 | ARRAY_SIZE(drm_framebuffer_debugfs_list));
|
| 1237 | }
|
| 1238 | #endif
|