drivers/gpu/drm/radeon/radeon_fbdev.c

   1 /*
   2  * Copyright © 2007 David Airlie
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *     David Airlie
  25  */
  26
  27 #include <linux/pci.h>
  28 #include <linux/pm_runtime.h>
  29 #include <linux/vga_switcheroo.h>
  30
  31 #include <drm/drm_crtc_helper.h>
  32 #include <drm/drm_drv.h>
  33 #include <drm/drm_fb_helper.h>
  34 #include <drm/drm_fourcc.h>
  35 #include <drm/drm_framebuffer.h>
  36 #include <drm/drm_gem_framebuffer_helper.h>
  37
  38 #include "radeon.h"
  39
  40 static void radeon_fbdev_destroy_pinned_object(struct drm_gem_object *gobj)
  41 {
  42         struct radeon_bo *rbo = gem_to_radeon_bo(gobj);
  43         int ret;
  44
  45         ret = radeon_bo_reserve(rbo, false);
  46         if (likely(ret == 0)) {
  47                 radeon_bo_kunmap(rbo);
  48                 radeon_bo_unpin(rbo);
  49                 radeon_bo_unreserve(rbo);
  50         }
  51         drm_gem_object_put(gobj);
  52 }
  53
  54 static int radeon_fbdev_create_pinned_object(struct drm_fb_helper *fb_helper,
  55                                              struct drm_mode_fb_cmd2 *mode_cmd,
  56                                              struct drm_gem_object **gobj_p)
  57 {
  58         const struct drm_format_info *info;
  59         struct radeon_device *rdev = fb_helper->dev->dev_private;
  60         struct drm_gem_object *gobj = NULL;
  61         struct radeon_bo *rbo = NULL;
  62         bool fb_tiled = false; /* useful for testing */
  63         u32 tiling_flags = 0;
  64         int ret;
  65         int aligned_size, size;
  66         int height = mode_cmd->height;
  67         u32 cpp;
  68
  69         info = drm_get_format_info(rdev->ddev, mode_cmd);
  70         cpp = info->cpp[0];
  71
  72         /* need to align pitch with crtc limits */
  73         mode_cmd->pitches[0] = radeon_align_pitch(rdev, mode_cmd->width, cpp,
  74                                                   fb_tiled);
  75
  76         if (rdev->family >= CHIP_R600)
  77                 height = ALIGN(mode_cmd->height, 8);
  78         size = mode_cmd->pitches[0] * height;
  79         aligned_size = ALIGN(size, PAGE_SIZE);
  80         ret = radeon_gem_object_create(rdev, aligned_size, 0,
  81                                        RADEON_GEM_DOMAIN_VRAM,
  82                                        0, true, &gobj);
  83         if (ret) {
  84                 pr_err("failed to allocate framebuffer (%d)\n", aligned_size);
  85                 return -ENOMEM;
  86         }
  87         rbo = gem_to_radeon_bo(gobj);
  88
  89         if (fb_tiled)
  90                 tiling_flags = RADEON_TILING_MACRO;
  91
  92 #ifdef __BIG_ENDIAN
  93         switch (cpp) {
  94         case 4:
  95                 tiling_flags |= RADEON_TILING_SWAP_32BIT;
  96                 break;
  97         case 2:
  98                 tiling_flags |= RADEON_TILING_SWAP_16BIT;
  99                 break;
 100         default:
 101                 break;
 102         }
 103 #endif
 104
 105         if (tiling_flags) {
 106                 ret = radeon_bo_set_tiling_flags(rbo,
 107                                                  tiling_flags | RADEON_TILING_SURFACE,
 108                                                  mode_cmd->pitches[0]);
 109                 if (ret)
 110                         dev_err(rdev->dev, "FB failed to set tiling flags\n");
 111         }
 112
 113         ret = radeon_bo_reserve(rbo, false);
 114         if (unlikely(ret != 0))
 115                 goto err_radeon_fbdev_destroy_pinned_object;
 116         /* Only 27 bit offset for legacy CRTC */
 117         ret = radeon_bo_pin_restricted(rbo, RADEON_GEM_DOMAIN_VRAM,
 118                                        ASIC_IS_AVIVO(rdev) ? 0 : 1 << 27,
 119                                        NULL);
 120         if (ret) {
 121                 radeon_bo_unreserve(rbo);
 122                 goto err_radeon_fbdev_destroy_pinned_object;
 123         }
 124         if (fb_tiled)
 125                 radeon_bo_check_tiling(rbo, 0, 0);
 126         ret = radeon_bo_kmap(rbo, NULL);
 127         radeon_bo_unreserve(rbo);
 128         if (ret)
 129                 goto err_radeon_fbdev_destroy_pinned_object;
 130
 131         *gobj_p = gobj;
 132         return 0;
 133
 134 err_radeon_fbdev_destroy_pinned_object:
 135         radeon_fbdev_destroy_pinned_object(gobj);
 136         *gobj_p = NULL;
 137         return ret;
 138 }
 139
 140 /*
 141  * Fbdev ops and struct fb_ops
 142  */
 143
 144 static int radeon_fbdev_fb_open(struct fb_info *info, int user)
 145 {
 146         struct drm_fb_helper *fb_helper = info->par;
 147         struct radeon_device *rdev = fb_helper->dev->dev_private;
 148         int ret;
 149
 150         ret = pm_runtime_get_sync(rdev->ddev->dev);
 151         if (ret < 0 && ret != -EACCES)
 152                 goto err_pm_runtime_mark_last_busy;
 153
 154         return 0;
 155
 156 err_pm_runtime_mark_last_busy:
 157         pm_runtime_mark_last_busy(rdev->ddev->dev);
 158         pm_runtime_put_autosuspend(rdev->ddev->dev);
 159         return ret;
 160 }
 161
 162 static int radeon_fbdev_fb_release(struct fb_info *info, int user)
 163 {
 164         struct drm_fb_helper *fb_helper = info->par;
 165         struct radeon_device *rdev = fb_helper->dev->dev_private;
 166
 167         pm_runtime_mark_last_busy(rdev->ddev->dev);
 168         pm_runtime_put_autosuspend(rdev->ddev->dev);
 169
 170         return 0;
 171 }
 172
 173 static void radeon_fbdev_fb_destroy(struct fb_info *info)
 174 {
 175         struct drm_fb_helper *fb_helper = info->par;
 176         struct drm_framebuffer *fb = fb_helper->fb;
 177         struct drm_gem_object *gobj = drm_gem_fb_get_obj(fb, 0);
 178
 179         drm_fb_helper_fini(fb_helper);
 180
 181         drm_framebuffer_unregister_private(fb);
 182         drm_framebuffer_cleanup(fb);
 183         kfree(fb);
 184         radeon_fbdev_destroy_pinned_object(gobj);
 185
 186         drm_client_release(&fb_helper->client);
 187         drm_fb_helper_unprepare(fb_helper);
 188         kfree(fb_helper);
 189 }
 190
 191 static const struct fb_ops radeon_fbdev_fb_ops = {
 192         .owner = THIS_MODULE,
 193         DRM_FB_HELPER_DEFAULT_OPS,
 194         .fb_open = radeon_fbdev_fb_open,
 195         .fb_release = radeon_fbdev_fb_release,
 196         .fb_read = drm_fb_helper_cfb_read,
 197         .fb_write = drm_fb_helper_cfb_write,
 198         .fb_fillrect = drm_fb_helper_cfb_fillrect,
 199         .fb_copyarea = drm_fb_helper_cfb_copyarea,
 200         .fb_imageblit = drm_fb_helper_cfb_imageblit,
 201         .fb_destroy = radeon_fbdev_fb_destroy,
 202 };
 203
 204 /*
 205  * Fbdev helpers and struct drm_fb_helper_funcs
 206  */
 207
 208 static int radeon_fbdev_fb_helper_fb_probe(struct drm_fb_helper *fb_helper,
 209                                            struct drm_fb_helper_surface_size *sizes)
 210 {
 211         struct radeon_device *rdev = fb_helper->dev->dev_private;
 212         struct drm_mode_fb_cmd2 mode_cmd = { };
 213         struct fb_info *info;
 214         struct drm_gem_object *gobj;
 215         struct radeon_bo *rbo;
 216         struct drm_framebuffer *fb;
 217         int ret;
 218         unsigned long tmp;
 219
 220         mode_cmd.width = sizes->surface_width;
 221         mode_cmd.height = sizes->surface_height;
 222
 223         /* avivo can't scanout real 24bpp */
 224         if ((sizes->surface_bpp == 24) && ASIC_IS_AVIVO(rdev))
 225                 sizes->surface_bpp = 32;
 226
 227         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 228                                                           sizes->surface_depth);
 229
 230         ret = radeon_fbdev_create_pinned_object(fb_helper, &mode_cmd, &gobj);
 231         if (ret) {
 232                 DRM_ERROR("failed to create fbcon object %d\n", ret);
 233                 return ret;
 234         }
 235         rbo = gem_to_radeon_bo(gobj);
 236
 237         fb = kzalloc(sizeof(*fb), GFP_KERNEL);
 238         if (!fb) {
 239                 ret = -ENOMEM;
 240                 goto err_radeon_fbdev_destroy_pinned_object;
 241         }
 242         ret = radeon_framebuffer_init(rdev->ddev, fb, &mode_cmd, gobj);
 243         if (ret) {
 244                 DRM_ERROR("failed to initialize framebuffer %d\n", ret);
 245                 goto err_kfree;
 246         }
 247
 248         /* setup helper */
 249         fb_helper->fb = fb;
 250
 251         /* okay we have an object now allocate the framebuffer */
 252         info = drm_fb_helper_alloc_info(fb_helper);
 253         if (IS_ERR(info)) {
 254                 ret = PTR_ERR(info);
 255                 goto err_drm_framebuffer_unregister_private;
 256         }
 257
 258         info->fbops = &radeon_fbdev_fb_ops;
 259         info->flags = FBINFO_DEFAULT;
 260         /* radeon resume is fragile and needs a vt switch to help it along */
 261         info->skip_vt_switch = false;
 262
 263         drm_fb_helper_fill_info(info, fb_helper, sizes);
 264
 265         tmp = radeon_bo_gpu_offset(rbo) - rdev->mc.vram_start;
 266         info->fix.smem_start = rdev->mc.aper_base + tmp;
 267         info->fix.smem_len = radeon_bo_size(rbo);
 268         info->screen_base = (__force void __iomem *)rbo->kptr;
 269         info->screen_size = radeon_bo_size(rbo);
 270
 271         memset_io(info->screen_base, 0, info->screen_size);
 272
 273         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 274
 275         DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);
 276         DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)rdev->mc.aper_base);
 277         DRM_INFO("size %lu\n", (unsigned long)radeon_bo_size(rbo));
 278         DRM_INFO("fb depth is %d\n", fb->format->depth);
 279         DRM_INFO("   pitch is %d\n", fb->pitches[0]);
 280
 281         return 0;
 282
 283 err_drm_framebuffer_unregister_private:
 284         fb_helper->fb = NULL;
 285         drm_framebuffer_unregister_private(fb);
 286         drm_framebuffer_cleanup(fb);
 287 err_kfree:
 288         kfree(fb);
 289 err_radeon_fbdev_destroy_pinned_object:
 290         radeon_fbdev_destroy_pinned_object(gobj);
 291         return ret;
 292 }
 293
 294 static const struct drm_fb_helper_funcs radeon_fbdev_fb_helper_funcs = {
 295         .fb_probe = radeon_fbdev_fb_helper_fb_probe,
 296 };
 297
 298 /*
 299  * Fbdev client and struct drm_client_funcs
 300  */
 301
 302 static void radeon_fbdev_client_unregister(struct drm_client_dev *client)
 303 {
 304         struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client);
 305         struct drm_device *dev = fb_helper->dev;
 306         struct radeon_device *rdev = dev->dev_private;
 307
 308         if (fb_helper->info) {
 309                 vga_switcheroo_client_fb_set(rdev->pdev, NULL);
 310                 drm_fb_helper_unregister_info(fb_helper);
 311         } else {
 312                 drm_client_release(&fb_helper->client);
 313                 drm_fb_helper_unprepare(fb_helper);
 314                 kfree(fb_helper);
 315         }
 316 }
 317
 318 static int radeon_fbdev_client_restore(struct drm_client_dev *client)
 319 {
 320         drm_fb_helper_lastclose(client->dev);
 321         vga_switcheroo_process_delayed_switch();
 322
 323         return 0;
 324 }
 325
 326 static int radeon_fbdev_client_hotplug(struct drm_client_dev *client)
 327 {
 328         struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client);
 329         struct drm_device *dev = client->dev;
 330         struct radeon_device *rdev = dev->dev_private;
 331         int ret;
 332
 333         if (dev->fb_helper)
 334                 return drm_fb_helper_hotplug_event(dev->fb_helper);
 335
 336         ret = drm_fb_helper_init(dev, fb_helper);
 337         if (ret)
 338                 goto err_drm_err;
 339
 340         if (!drm_drv_uses_atomic_modeset(dev))
 341                 drm_helper_disable_unused_functions(dev);
 342
 343         ret = drm_fb_helper_initial_config(fb_helper);
 344         if (ret)
 345                 goto err_drm_fb_helper_fini;
 346
 347         vga_switcheroo_client_fb_set(rdev->pdev, fb_helper->info);
 348
 349         return 0;
 350
 351 err_drm_fb_helper_fini:
 352         drm_fb_helper_fini(fb_helper);
 353 err_drm_err:
 354         drm_err(dev, "Failed to setup radeon fbdev emulation (ret=%d)\n", ret);
 355         return ret;
 356 }
 357
 358 static const struct drm_client_funcs radeon_fbdev_client_funcs = {
 359         .owner          = THIS_MODULE,
 360         .unregister     = radeon_fbdev_client_unregister,
 361         .restore        = radeon_fbdev_client_restore,
 362         .hotplug        = radeon_fbdev_client_hotplug,
 363 };
 364
 365 void radeon_fbdev_setup(struct radeon_device *rdev)
 366 {
 367         struct drm_fb_helper *fb_helper;
 368         int bpp_sel = 32;
 369         int ret;
 370
 371         if (rdev->mc.real_vram_size <= (8 * 1024 * 1024))
 372                 bpp_sel = 8;
 373         else if (ASIC_IS_RN50(rdev) || rdev->mc.real_vram_size <= (32 * 1024 * 1024))
 374                 bpp_sel = 16;
 375
 376         fb_helper = kzalloc(sizeof(*fb_helper), GFP_KERNEL);
 377         if (!fb_helper)
 378                 return;
 379         drm_fb_helper_prepare(rdev->ddev, fb_helper, bpp_sel, &radeon_fbdev_fb_helper_funcs);
 380
 381         ret = drm_client_init(rdev->ddev, &fb_helper->client, "radeon-fbdev",
 382                               &radeon_fbdev_client_funcs);
 383         if (ret) {
 384                 drm_err(rdev->ddev, "Failed to register client: %d\n", ret);
 385                 goto err_drm_client_init;
 386         }
 387
 388         ret = radeon_fbdev_client_hotplug(&fb_helper->client);
 389         if (ret)
 390                 drm_dbg_kms(rdev->ddev, "client hotplug ret=%d\n", ret);
 391
 392         drm_client_register(&fb_helper->client);
 393
 394         return;
 395
 396 err_drm_client_init:
 397         drm_fb_helper_unprepare(fb_helper);
 398         kfree(fb_helper);
 399 }
 400
 401 void radeon_fbdev_set_suspend(struct radeon_device *rdev, int state)
 402 {
 403         if (rdev->ddev->fb_helper)
 404                 drm_fb_helper_set_suspend(rdev->ddev->fb_helper, state);
 405 }
 406
 407 bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj)
 408 {
 409         struct drm_fb_helper *fb_helper = rdev->ddev->fb_helper;
 410         struct drm_gem_object *gobj;
 411
 412         if (!fb_helper)
 413                 return false;
 414
 415         gobj = drm_gem_fb_get_obj(fb_helper->fb, 0);
 416         if (!gobj)
 417                 return false;
 418         if (gobj != &robj->tbo.base)
 419                 return false;
 420
 421         return true;
 422 }