drivers/gpu/drm/virtio/virtgpu_fb.c

   1 /*
   2  * Copyright (C) 2015 Red Hat, Inc.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining
   6  * a copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sublicense, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial
  15  * portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 #include <drm/drmP.h>
  27 #include <drm/drm_fb_helper.h>
  28 #include "virtgpu_drv.h"
  29
  30 #define VIRTIO_GPU_FBCON_POLL_PERIOD (HZ / 60)
  31
  32 struct virtio_gpu_fbdev {
  33         struct drm_fb_helper           helper;
  34         struct virtio_gpu_framebuffer  vgfb;
  35         struct list_head               fbdev_list;
  36         struct virtio_gpu_device       *vgdev;
  37         struct delayed_work            work;
  38 };
  39
  40 static int virtio_gpu_dirty_update(struct virtio_gpu_framebuffer *fb,
  41                                    bool store, int x, int y,
  42                                    int width, int height)
  43 {
  44         struct drm_device *dev = fb->base.dev;
  45         struct virtio_gpu_device *vgdev = dev->dev_private;
  46         bool store_for_later = false;
  47         int bpp = fb->base.bits_per_pixel / 8;
  48         int x2, y2;
  49         unsigned long flags;
  50         struct virtio_gpu_object *obj = gem_to_virtio_gpu_obj(fb->obj);
  51
  52         if ((width <= 0) ||
  53             (x + width > fb->base.width) ||
  54             (y + height > fb->base.height)) {
  55                 DRM_DEBUG("values out of range %dx%d+%d+%d, fb %dx%d\n",
  56                           width, height, x, y,
  57                           fb->base.width, fb->base.height);
  58                 return -EINVAL;
  59         }
  60
  61         /*
  62          * Can be called with pretty much any context (console output
  63          * path).  If we are in atomic just store the dirty rect info
  64          * to send out the update later.
  65          *
  66          * Can't test inside spin lock.
  67          */
  68         if (in_atomic() || store)
  69                 store_for_later = true;
  70
  71         x2 = x + width - 1;
  72         y2 = y + height - 1;
  73
  74         spin_lock_irqsave(&fb->dirty_lock, flags);
  75
  76         if (fb->y1 < y)
  77                 y = fb->y1;
  78         if (fb->y2 > y2)
  79                 y2 = fb->y2;
  80         if (fb->x1 < x)
  81                 x = fb->x1;
  82         if (fb->x2 > x2)
  83                 x2 = fb->x2;
  84
  85         if (store_for_later) {
  86                 fb->x1 = x;
  87                 fb->x2 = x2;
  88                 fb->y1 = y;
  89                 fb->y2 = y2;
  90                 spin_unlock_irqrestore(&fb->dirty_lock, flags);
  91                 return 0;
  92         }
  93
  94         fb->x1 = fb->y1 = INT_MAX;
  95         fb->x2 = fb->y2 = 0;
  96
  97         spin_unlock_irqrestore(&fb->dirty_lock, flags);
  98
  99         {
 100                 uint32_t offset;
 101                 uint32_t w = x2 - x + 1;
 102                 uint32_t h = y2 - y + 1;
 103
 104                 offset = (y * fb->base.pitches[0]) + x * bpp;
 105
 106                 virtio_gpu_cmd_transfer_to_host_2d(vgdev, obj->hw_res_handle,
 107                                                    offset,
 108                                                    cpu_to_le32(w),
 109                                                    cpu_to_le32(h),
 110                                                    cpu_to_le32(x),
 111                                                    cpu_to_le32(y),
 112                                                    NULL);
 113
 114         }
 115         virtio_gpu_cmd_resource_flush(vgdev, obj->hw_res_handle,
 116                                       x, y, x2 - x + 1, y2 - y + 1);
 117         return 0;
 118 }
 119
 120 int virtio_gpu_surface_dirty(struct virtio_gpu_framebuffer *vgfb,
 121                              struct drm_clip_rect *clips,
 122                              unsigned num_clips)
 123 {
 124         struct virtio_gpu_device *vgdev = vgfb->base.dev->dev_private;
 125         struct virtio_gpu_object *obj = gem_to_virtio_gpu_obj(vgfb->obj);
 126         struct drm_clip_rect norect;
 127         struct drm_clip_rect *clips_ptr;
 128         int left, right, top, bottom;
 129         int i;
 130         int inc = 1;
 131         if (!num_clips) {
 132                 num_clips = 1;
 133                 clips = &norect;
 134                 norect.x1 = norect.y1 = 0;
 135                 norect.x2 = vgfb->base.width;
 136                 norect.y2 = vgfb->base.height;
 137         }
 138         left = clips->x1;
 139         right = clips->x2;
 140         top = clips->y1;
 141         bottom = clips->y2;
 142
 143         /* skip the first clip rect */
 144         for (i = 1, clips_ptr = clips + inc;
 145              i < num_clips; i++, clips_ptr += inc) {
 146                 left = min_t(int, left, (int)clips_ptr->x1);
 147                 right = max_t(int, right, (int)clips_ptr->x2);
 148                 top = min_t(int, top, (int)clips_ptr->y1);
 149                 bottom = max_t(int, bottom, (int)clips_ptr->y2);
 150         }
 151
 152         if (obj->dumb)
 153                 return virtio_gpu_dirty_update(vgfb, false, left, top,
 154                                                right - left, bottom - top);
 155
 156         virtio_gpu_cmd_resource_flush(vgdev, obj->hw_res_handle,
 157                                       left, top, right - left, bottom - top);
 158         return 0;
 159 }
 160
 161 static void virtio_gpu_fb_dirty_work(struct work_struct *work)
 162 {
 163         struct delayed_work *delayed_work = to_delayed_work(work);
 164         struct virtio_gpu_fbdev *vfbdev =
 165                 container_of(delayed_work, struct virtio_gpu_fbdev, work);
 166         struct virtio_gpu_framebuffer *vgfb = &vfbdev->vgfb;
 167
 168         virtio_gpu_dirty_update(&vfbdev->vgfb, false, vgfb->x1, vgfb->y1,
 169                                 vgfb->x2 - vgfb->x1, vgfb->y2 - vgfb->y1);
 170 }
 171
 172 static void virtio_gpu_3d_fillrect(struct fb_info *info,
 173                                    const struct fb_fillrect *rect)
 174 {
 175         struct virtio_gpu_fbdev *vfbdev = info->par;
 176         drm_fb_helper_sys_fillrect(info, rect);
 177         virtio_gpu_dirty_update(&vfbdev->vgfb, true, rect->dx, rect->dy,
 178                              rect->width, rect->height);
 179         schedule_delayed_work(&vfbdev->work, VIRTIO_GPU_FBCON_POLL_PERIOD);
 180 }
 181
 182 static void virtio_gpu_3d_copyarea(struct fb_info *info,
 183                                    const struct fb_copyarea *area)
 184 {
 185         struct virtio_gpu_fbdev *vfbdev = info->par;
 186         drm_fb_helper_sys_copyarea(info, area);
 187         virtio_gpu_dirty_update(&vfbdev->vgfb, true, area->dx, area->dy,
 188                            area->width, area->height);
 189         schedule_delayed_work(&vfbdev->work, VIRTIO_GPU_FBCON_POLL_PERIOD);
 190 }
 191
 192 static void virtio_gpu_3d_imageblit(struct fb_info *info,
 193                                     const struct fb_image *image)
 194 {
 195         struct virtio_gpu_fbdev *vfbdev = info->par;
 196         drm_fb_helper_sys_imageblit(info, image);
 197         virtio_gpu_dirty_update(&vfbdev->vgfb, true, image->dx, image->dy,
 198                              image->width, image->height);
 199         schedule_delayed_work(&vfbdev->work, VIRTIO_GPU_FBCON_POLL_PERIOD);
 200 }
 201
 202 static struct fb_ops virtio_gpufb_ops = {
 203         .owner = THIS_MODULE,
 204         .fb_check_var = drm_fb_helper_check_var,
 205         .fb_set_par = drm_fb_helper_set_par, /* TODO: copy vmwgfx */
 206         .fb_fillrect = virtio_gpu_3d_fillrect,
 207         .fb_copyarea = virtio_gpu_3d_copyarea,
 208         .fb_imageblit = virtio_gpu_3d_imageblit,
 209         .fb_pan_display = drm_fb_helper_pan_display,
 210         .fb_blank = drm_fb_helper_blank,
 211         .fb_setcmap = drm_fb_helper_setcmap,
 212         .fb_debug_enter = drm_fb_helper_debug_enter,
 213         .fb_debug_leave = drm_fb_helper_debug_leave,
 214 };
 215
 216 static int virtio_gpu_vmap_fb(struct virtio_gpu_device *vgdev,
 217                               struct virtio_gpu_object *obj)
 218 {
 219         return virtio_gpu_object_kmap(obj, NULL);
 220 }
 221
 222 static int virtio_gpufb_create(struct drm_fb_helper *helper,
 223                                struct drm_fb_helper_surface_size *sizes)
 224 {
 225         struct virtio_gpu_fbdev *vfbdev =
 226                 container_of(helper, struct virtio_gpu_fbdev, helper);
 227         struct drm_device *dev = helper->dev;
 228         struct virtio_gpu_device *vgdev = dev->dev_private;
 229         struct fb_info *info;
 230         struct drm_framebuffer *fb;
 231         struct drm_mode_fb_cmd2 mode_cmd = {};
 232         struct virtio_gpu_object *obj;
 233         uint32_t resid, format, size;
 234         int ret;
 235
 236         mode_cmd.width = sizes->surface_width;
 237         mode_cmd.height = sizes->surface_height;
 238         mode_cmd.pitches[0] = mode_cmd.width * 4;
 239         mode_cmd.pixel_format = drm_mode_legacy_fb_format(32, 24);
 240
 241         switch (mode_cmd.pixel_format) {
 242 #ifdef __BIG_ENDIAN
 243         case DRM_FORMAT_XRGB8888:
 244                 format = VIRTIO_GPU_FORMAT_X8R8G8B8_UNORM;
 245                 break;
 246         case DRM_FORMAT_ARGB8888:
 247                 format = VIRTIO_GPU_FORMAT_A8R8G8B8_UNORM;
 248                 break;
 249         case DRM_FORMAT_BGRX8888:
 250                 format = VIRTIO_GPU_FORMAT_B8G8R8X8_UNORM;
 251                 break;
 252         case DRM_FORMAT_BGRA8888:
 253                 format = VIRTIO_GPU_FORMAT_B8G8R8A8_UNORM;
 254                 break;
 255         case DRM_FORMAT_RGBX8888:
 256                 format = VIRTIO_GPU_FORMAT_R8G8B8X8_UNORM;
 257                 break;
 258         case DRM_FORMAT_RGBA8888:
 259                 format = VIRTIO_GPU_FORMAT_R8G8B8A8_UNORM;
 260                 break;
 261         case DRM_FORMAT_XBGR8888:
 262                 format = VIRTIO_GPU_FORMAT_X8B8G8R8_UNORM;
 263                 break;
 264         case DRM_FORMAT_ABGR8888:
 265                 format = VIRTIO_GPU_FORMAT_A8B8G8R8_UNORM;
 266                 break;
 267 #else
 268         case DRM_FORMAT_XRGB8888:
 269                 format = VIRTIO_GPU_FORMAT_B8G8R8X8_UNORM;
 270                 break;
 271         case DRM_FORMAT_ARGB8888:
 272                 format = VIRTIO_GPU_FORMAT_B8G8R8A8_UNORM;
 273                 break;
 274         case DRM_FORMAT_BGRX8888:
 275                 format = VIRTIO_GPU_FORMAT_X8R8G8B8_UNORM;
 276                 break;
 277         case DRM_FORMAT_BGRA8888:
 278                 format = VIRTIO_GPU_FORMAT_A8R8G8B8_UNORM;
 279                 break;
 280         case DRM_FORMAT_RGBX8888:
 281                 format = VIRTIO_GPU_FORMAT_X8B8G8R8_UNORM;
 282                 break;
 283         case DRM_FORMAT_RGBA8888:
 284                 format = VIRTIO_GPU_FORMAT_A8B8G8R8_UNORM;
 285                 break;
 286         case DRM_FORMAT_XBGR8888:
 287                 format = VIRTIO_GPU_FORMAT_R8G8B8X8_UNORM;
 288                 break;
 289         case DRM_FORMAT_ABGR8888:
 290                 format = VIRTIO_GPU_FORMAT_R8G8B8A8_UNORM;
 291                 break;
 292 #endif
 293         default:
 294                 DRM_ERROR("failed to find virtio gpu format for %d\n",
 295                           mode_cmd.pixel_format);
 296                 return -EINVAL;
 297         }
 298
 299         size = mode_cmd.pitches[0] * mode_cmd.height;
 300         obj = virtio_gpu_alloc_object(dev, size, false, true);
 301         if (IS_ERR(obj))
 302                 return PTR_ERR(obj);
 303
 304         virtio_gpu_resource_id_get(vgdev, &resid);
 305         virtio_gpu_cmd_create_resource(vgdev, resid, format,
 306                                        mode_cmd.width, mode_cmd.height);
 307
 308         ret = virtio_gpu_vmap_fb(vgdev, obj);
 309         if (ret) {
 310                 DRM_ERROR("failed to vmap fb %d\n", ret);
 311                 goto err_obj_vmap;
 312         }
 313
 314         /* attach the object to the resource */
 315         ret = virtio_gpu_object_attach(vgdev, obj, resid, NULL);
 316         if (ret)
 317                 goto err_obj_attach;
 318
 319         info = drm_fb_helper_alloc_fbi(helper);
 320         if (IS_ERR(info)) {
 321                 ret = PTR_ERR(info);
 322                 goto err_fb_alloc;
 323         }
 324
 325         info->par = helper;
 326
 327         ret = virtio_gpu_framebuffer_init(dev, &vfbdev->vgfb,
 328                                           &mode_cmd, &obj->gem_base);
 329         if (ret)
 330                 goto err_fb_init;
 331
 332         fb = &vfbdev->vgfb.base;
 333
 334         vfbdev->helper.fb = fb;
 335
 336         strcpy(info->fix.id, "virtiodrmfb");
 337         info->flags = FBINFO_DEFAULT;
 338         info->fbops = &virtio_gpufb_ops;
 339         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 340
 341         info->screen_base = obj->vmap;
 342         info->screen_size = obj->gem_base.size;
 343         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 344         drm_fb_helper_fill_var(info, &vfbdev->helper,
 345                                sizes->fb_width, sizes->fb_height);
 346
 347         info->fix.mmio_start = 0;
 348         info->fix.mmio_len = 0;
 349         return 0;
 350
 351 err_fb_init:
 352         drm_fb_helper_release_fbi(helper);
 353 err_fb_alloc:
 354         virtio_gpu_cmd_resource_inval_backing(vgdev, resid);
 355 err_obj_attach:
 356 err_obj_vmap:
 357         virtio_gpu_gem_free_object(&obj->gem_base);
 358         return ret;
 359 }
 360
 361 static int virtio_gpu_fbdev_destroy(struct drm_device *dev,
 362                                     struct virtio_gpu_fbdev *vgfbdev)
 363 {
 364         struct virtio_gpu_framebuffer *vgfb = &vgfbdev->vgfb;
 365
 366         drm_fb_helper_unregister_fbi(&vgfbdev->helper);
 367         drm_fb_helper_release_fbi(&vgfbdev->helper);
 368
 369         if (vgfb->obj)
 370                 vgfb->obj = NULL;
 371         drm_fb_helper_fini(&vgfbdev->helper);
 372         drm_framebuffer_cleanup(&vgfb->base);
 373
 374         return 0;
 375 }
 376 static struct drm_fb_helper_funcs virtio_gpu_fb_helper_funcs = {
 377         .fb_probe = virtio_gpufb_create,
 378 };
 379
 380 int virtio_gpu_fbdev_init(struct virtio_gpu_device *vgdev)
 381 {
 382         struct virtio_gpu_fbdev *vgfbdev;
 383         int bpp_sel = 32; /* TODO: parameter from somewhere? */
 384         int ret;
 385
 386         vgfbdev = kzalloc(sizeof(struct virtio_gpu_fbdev), GFP_KERNEL);
 387         if (!vgfbdev)
 388                 return -ENOMEM;
 389
 390         vgfbdev->vgdev = vgdev;
 391         vgdev->vgfbdev = vgfbdev;
 392         INIT_DELAYED_WORK(&vgfbdev->work, virtio_gpu_fb_dirty_work);
 393
 394         drm_fb_helper_prepare(vgdev->ddev, &vgfbdev->helper,
 395                               &virtio_gpu_fb_helper_funcs);
 396         ret = drm_fb_helper_init(vgdev->ddev, &vgfbdev->helper,
 397                                  vgdev->num_scanouts,
 398                                  VIRTIO_GPUFB_CONN_LIMIT);
 399         if (ret) {
 400                 kfree(vgfbdev);
 401                 return ret;
 402         }
 403
 404         drm_fb_helper_single_add_all_connectors(&vgfbdev->helper);
 405         drm_fb_helper_initial_config(&vgfbdev->helper, bpp_sel);
 406         return 0;
 407 }
 408
 409 void virtio_gpu_fbdev_fini(struct virtio_gpu_device *vgdev)
 410 {
 411         if (!vgdev->vgfbdev)
 412                 return;
 413
 414         virtio_gpu_fbdev_destroy(vgdev->ddev, vgdev->vgfbdev);
 415         kfree(vgdev->vgfbdev);
 416         vgdev->vgfbdev = NULL;
 417 }