drivers/gpu/drm/radeon/radeon_fb.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 #include <linux/module.h>
  27 #include <linux/slab.h>
  28 #include <linux/pm_runtime.h>
  29
  30 #include <drm/drmP.h>
  31 #include <drm/drm_crtc.h>
  32 #include <drm/drm_crtc_helper.h>
  33 #include <drm/radeon_drm.h>
  34 #include "radeon.h"
  35
  36 #include <drm/drm_fb_helper.h>
  37
  38 #include <linux/vga_switcheroo.h>
  39
  40 /* object hierarchy -
  41  * this contains a helper + a radeon fb
  42  * the helper contains a pointer to radeon framebuffer baseclass.
  43  */
  44 struct radeon_fbdev {
  45         struct drm_fb_helper helper;
  46         struct radeon_framebuffer rfb;
  47         struct radeon_device *rdev;
  48 };
  49
  50 static int
  51 radeonfb_open(struct fb_info *info, int user)
  52 {
  53         struct radeon_fbdev *rfbdev = info->par;
  54         struct radeon_device *rdev = rfbdev->rdev;
  55         int ret = pm_runtime_get_sync(rdev->ddev->dev);
  56         if (ret < 0 && ret != -EACCES) {
  57                 pm_runtime_mark_last_busy(rdev->ddev->dev);
  58                 pm_runtime_put_autosuspend(rdev->ddev->dev);
  59                 return ret;
  60         }
  61         return 0;
  62 }
  63
  64 static int
  65 radeonfb_release(struct fb_info *info, int user)
  66 {
  67         struct radeon_fbdev *rfbdev = info->par;
  68         struct radeon_device *rdev = rfbdev->rdev;
  69
  70         pm_runtime_mark_last_busy(rdev->ddev->dev);
  71         pm_runtime_put_autosuspend(rdev->ddev->dev);
  72         return 0;
  73 }
  74
  75 static struct fb_ops radeonfb_ops = {
  76         .owner = THIS_MODULE,
  77         DRM_FB_HELPER_DEFAULT_OPS,
  78         .fb_open = radeonfb_open,
  79         .fb_release = radeonfb_release,
  80         .fb_fillrect = drm_fb_helper_cfb_fillrect,
  81         .fb_copyarea = drm_fb_helper_cfb_copyarea,
  82         .fb_imageblit = drm_fb_helper_cfb_imageblit,
  83 };
  84
  85
  86 int radeon_align_pitch(struct radeon_device *rdev, int width, int cpp, bool tiled)
  87 {
  88         int aligned = width;
  89         int align_large = (ASIC_IS_AVIVO(rdev)) || tiled;
  90         int pitch_mask = 0;
  91
  92         switch (cpp) {
  93         case 1:
  94                 pitch_mask = align_large ? 255 : 127;
  95                 break;
  96         case 2:
  97                 pitch_mask = align_large ? 127 : 31;
  98                 break;
  99         case 3:
 100         case 4:
 101                 pitch_mask = align_large ? 63 : 15;
 102                 break;
 103         }
 104
 105         aligned += pitch_mask;
 106         aligned &= ~pitch_mask;
 107         return aligned * cpp;
 108 }
 109
 110 static void radeonfb_destroy_pinned_object(struct drm_gem_object *gobj)
 111 {
 112         struct radeon_bo *rbo = gem_to_radeon_bo(gobj);
 113         int ret;
 114
 115         ret = radeon_bo_reserve(rbo, false);
 116         if (likely(ret == 0)) {
 117                 radeon_bo_kunmap(rbo);
 118                 radeon_bo_unpin(rbo);
 119                 radeon_bo_unreserve(rbo);
 120         }
 121         drm_gem_object_unreference_unlocked(gobj);
 122 }
 123
 124 static int radeonfb_create_pinned_object(struct radeon_fbdev *rfbdev,
 125                                          struct drm_mode_fb_cmd2 *mode_cmd,
 126                                          struct drm_gem_object **gobj_p)
 127 {
 128         struct radeon_device *rdev = rfbdev->rdev;
 129         struct drm_gem_object *gobj = NULL;
 130         struct radeon_bo *rbo = NULL;
 131         bool fb_tiled = false; /* useful for testing */
 132         u32 tiling_flags = 0;
 133         int ret;
 134         int aligned_size, size;
 135         int height = mode_cmd->height;
 136         u32 cpp;
 137
 138         cpp = drm_format_plane_cpp(mode_cmd->pixel_format, 0);
 139
 140         /* need to align pitch with crtc limits */
 141         mode_cmd->pitches[0] = radeon_align_pitch(rdev, mode_cmd->width, cpp,
 142                                                   fb_tiled);
 143
 144         if (rdev->family >= CHIP_R600)
 145                 height = ALIGN(mode_cmd->height, 8);
 146         size = mode_cmd->pitches[0] * height;
 147         aligned_size = ALIGN(size, PAGE_SIZE);
 148         ret = radeon_gem_object_create(rdev, aligned_size, 0,
 149                                        RADEON_GEM_DOMAIN_VRAM,
 150                                        0, true, &gobj);
 151         if (ret) {
 152                 printk(KERN_ERR "failed to allocate framebuffer (%d)\n",
 153                        aligned_size);
 154                 return -ENOMEM;
 155         }
 156         rbo = gem_to_radeon_bo(gobj);
 157
 158         if (fb_tiled)
 159                 tiling_flags = RADEON_TILING_MACRO;
 160
 161 #ifdef __BIG_ENDIAN
 162         switch (cpp) {
 163         case 4:
 164                 tiling_flags |= RADEON_TILING_SWAP_32BIT;
 165                 break;
 166         case 2:
 167                 tiling_flags |= RADEON_TILING_SWAP_16BIT;
 168         default:
 169                 break;
 170         }
 171 #endif
 172
 173         if (tiling_flags) {
 174                 ret = radeon_bo_set_tiling_flags(rbo,
 175                                                  tiling_flags | RADEON_TILING_SURFACE,
 176                                                  mode_cmd->pitches[0]);
 177                 if (ret)
 178                         dev_err(rdev->dev, "FB failed to set tiling flags\n");
 179         }
 180
 181
 182         ret = radeon_bo_reserve(rbo, false);
 183         if (unlikely(ret != 0))
 184                 goto out_unref;
 185         /* Only 27 bit offset for legacy CRTC */
 186         ret = radeon_bo_pin_restricted(rbo, RADEON_GEM_DOMAIN_VRAM,
 187                                        ASIC_IS_AVIVO(rdev) ? 0 : 1 << 27,
 188                                        NULL);
 189         if (ret) {
 190                 radeon_bo_unreserve(rbo);
 191                 goto out_unref;
 192         }
 193         if (fb_tiled)
 194                 radeon_bo_check_tiling(rbo, 0, 0);
 195         ret = radeon_bo_kmap(rbo, NULL);
 196         radeon_bo_unreserve(rbo);
 197         if (ret) {
 198                 goto out_unref;
 199         }
 200
 201         *gobj_p = gobj;
 202         return 0;
 203 out_unref:
 204         radeonfb_destroy_pinned_object(gobj);
 205         *gobj_p = NULL;
 206         return ret;
 207 }
 208
 209 static int radeonfb_create(struct drm_fb_helper *helper,
 210                            struct drm_fb_helper_surface_size *sizes)
 211 {
 212         struct radeon_fbdev *rfbdev =
 213                 container_of(helper, struct radeon_fbdev, helper);
 214         struct radeon_device *rdev = rfbdev->rdev;
 215         struct fb_info *info;
 216         struct drm_framebuffer *fb = NULL;
 217         struct drm_mode_fb_cmd2 mode_cmd;
 218         struct drm_gem_object *gobj = NULL;
 219         struct radeon_bo *rbo = NULL;
 220         int ret;
 221         unsigned long tmp;
 222
 223         mode_cmd.width = sizes->surface_width;
 224         mode_cmd.height = sizes->surface_height;
 225
 226         /* avivo can't scanout real 24bpp */
 227         if ((sizes->surface_bpp == 24) && ASIC_IS_AVIVO(rdev))
 228                 sizes->surface_bpp = 32;
 229
 230         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 231                                                           sizes->surface_depth);
 232
 233         ret = radeonfb_create_pinned_object(rfbdev, &mode_cmd, &gobj);
 234         if (ret) {
 235                 DRM_ERROR("failed to create fbcon object %d\n", ret);
 236                 return ret;
 237         }
 238
 239         rbo = gem_to_radeon_bo(gobj);
 240
 241         /* okay we have an object now allocate the framebuffer */
 242         info = drm_fb_helper_alloc_fbi(helper);
 243         if (IS_ERR(info)) {
 244                 ret = PTR_ERR(info);
 245                 goto out_unref;
 246         }
 247
 248         info->par = rfbdev;
 249         info->skip_vt_switch = true;
 250
 251         ret = radeon_framebuffer_init(rdev->ddev, &rfbdev->rfb, &mode_cmd, gobj);
 252         if (ret) {
 253                 DRM_ERROR("failed to initialize framebuffer %d\n", ret);
 254                 goto out_destroy_fbi;
 255         }
 256
 257         fb = &rfbdev->rfb.base;
 258
 259         /* setup helper */
 260         rfbdev->helper.fb = fb;
 261
 262         memset_io(rbo->kptr, 0x0, radeon_bo_size(rbo));
 263
 264         strcpy(info->fix.id, "radeondrmfb");
 265
 266         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 267
 268         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 269         info->fbops = &radeonfb_ops;
 270
 271         tmp = radeon_bo_gpu_offset(rbo) - rdev->mc.vram_start;
 272         info->fix.smem_start = rdev->mc.aper_base + tmp;
 273         info->fix.smem_len = radeon_bo_size(rbo);
 274         info->screen_base = rbo->kptr;
 275         info->screen_size = radeon_bo_size(rbo);
 276
 277         drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height);
 278
 279         /* setup aperture base/size for vesafb takeover */
 280         info->apertures->ranges[0].base = rdev->ddev->mode_config.fb_base;
 281         info->apertures->ranges[0].size = rdev->mc.aper_size;
 282
 283         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 284
 285         if (info->screen_base == NULL) {
 286                 ret = -ENOSPC;
 287                 goto out_destroy_fbi;
 288         }
 289
 290         DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);
 291         DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)rdev->mc.aper_base);
 292         DRM_INFO("size %lu\n", (unsigned long)radeon_bo_size(rbo));
 293         DRM_INFO("fb depth is %d\n", fb->depth);
 294         DRM_INFO("   pitch is %d\n", fb->pitches[0]);
 295
 296         vga_switcheroo_client_fb_set(rdev->ddev->pdev, info);
 297         return 0;
 298
 299 out_destroy_fbi:
 300         drm_fb_helper_release_fbi(helper);
 301 out_unref:
 302         if (rbo) {
 303
 304         }
 305         if (fb && ret) {
 306                 drm_gem_object_unreference_unlocked(gobj);
 307                 drm_framebuffer_unregister_private(fb);
 308                 drm_framebuffer_cleanup(fb);
 309                 kfree(fb);
 310         }
 311         return ret;
 312 }
 313
 314 void radeon_fb_output_poll_changed(struct radeon_device *rdev)
 315 {
 316         if (rdev->mode_info.rfbdev)
 317                 drm_fb_helper_hotplug_event(&rdev->mode_info.rfbdev->helper);
 318 }
 319
 320 static int radeon_fbdev_destroy(struct drm_device *dev, struct radeon_fbdev *rfbdev)
 321 {
 322         struct radeon_framebuffer *rfb = &rfbdev->rfb;
 323
 324         drm_fb_helper_unregister_fbi(&rfbdev->helper);
 325         drm_fb_helper_release_fbi(&rfbdev->helper);
 326
 327         if (rfb->obj) {
 328                 radeonfb_destroy_pinned_object(rfb->obj);
 329                 rfb->obj = NULL;
 330         }
 331         drm_fb_helper_fini(&rfbdev->helper);
 332         drm_framebuffer_unregister_private(&rfb->base);
 333         drm_framebuffer_cleanup(&rfb->base);
 334
 335         return 0;
 336 }
 337
 338 static const struct drm_fb_helper_funcs radeon_fb_helper_funcs = {
 339         .gamma_set = radeon_crtc_fb_gamma_set,
 340         .gamma_get = radeon_crtc_fb_gamma_get,
 341         .fb_probe = radeonfb_create,
 342 };
 343
 344 int radeon_fbdev_init(struct radeon_device *rdev)
 345 {
 346         struct radeon_fbdev *rfbdev;
 347         int bpp_sel = 32;
 348         int ret;
 349
 350         /* don't enable fbdev if no connectors */
 351         if (list_empty(&rdev->ddev->mode_config.connector_list))
 352                 return 0;
 353
 354         /* select 8 bpp console on RN50 or 16MB cards */
 355         if (ASIC_IS_RN50(rdev) || rdev->mc.real_vram_size <= (32*1024*1024))
 356                 bpp_sel = 8;
 357
 358         rfbdev = kzalloc(sizeof(struct radeon_fbdev), GFP_KERNEL);
 359         if (!rfbdev)
 360                 return -ENOMEM;
 361
 362         rfbdev->rdev = rdev;
 363         rdev->mode_info.rfbdev = rfbdev;
 364
 365         drm_fb_helper_prepare(rdev->ddev, &rfbdev->helper,
 366                               &radeon_fb_helper_funcs);
 367
 368         ret = drm_fb_helper_init(rdev->ddev, &rfbdev->helper,
 369                                  rdev->num_crtc,
 370                                  RADEONFB_CONN_LIMIT);
 371         if (ret)
 372                 goto free;
 373
 374         ret = drm_fb_helper_single_add_all_connectors(&rfbdev->helper);
 375         if (ret)
 376                 goto fini;
 377
 378         /* disable all the possible outputs/crtcs before entering KMS mode */
 379         drm_helper_disable_unused_functions(rdev->ddev);
 380
 381         ret = drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
 382         if (ret)
 383                 goto fini;
 384
 385         return 0;
 386
 387 fini:
 388         drm_fb_helper_fini(&rfbdev->helper);
 389 free:
 390         kfree(rfbdev);
 391         return ret;
 392 }
 393
 394 void radeon_fbdev_fini(struct radeon_device *rdev)
 395 {
 396         if (!rdev->mode_info.rfbdev)
 397                 return;
 398
 399         radeon_fbdev_destroy(rdev->ddev, rdev->mode_info.rfbdev);
 400         kfree(rdev->mode_info.rfbdev);
 401         rdev->mode_info.rfbdev = NULL;
 402 }
 403
 404 void radeon_fbdev_set_suspend(struct radeon_device *rdev, int state)
 405 {
 406         if (rdev->mode_info.rfbdev)
 407                 drm_fb_helper_set_suspend(&rdev->mode_info.rfbdev->helper, state);
 408 }
 409
 410 bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj)
 411 {
 412         if (!rdev->mode_info.rfbdev)
 413                 return false;
 414
 415         if (robj == gem_to_radeon_bo(rdev->mode_info.rfbdev->rfb.obj))
 416                 return true;
 417         return false;
 418 }
 419
 420 void radeon_fb_add_connector(struct radeon_device *rdev, struct drm_connector *connector)
 421 {
 422         if (rdev->mode_info.rfbdev)
 423                 drm_fb_helper_add_one_connector(&rdev->mode_info.rfbdev->helper, connector);
 424 }
 425
 426 void radeon_fb_remove_connector(struct radeon_device *rdev, struct drm_connector *connector)
 427 {
 428         if (rdev->mode_info.rfbdev)
 429                 drm_fb_helper_remove_one_connector(&rdev->mode_info.rfbdev->helper, connector);
 430 }
 431
 432 void radeon_fbdev_restore_mode(struct radeon_device *rdev)
 433 {
 434         struct radeon_fbdev *rfbdev = rdev->mode_info.rfbdev;
 435         struct drm_fb_helper *fb_helper;
 436         int ret;
 437
 438         if (!rfbdev)
 439                 return;
 440
 441         fb_helper = &rfbdev->helper;
 442
 443         ret = drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper);
 444         if (ret)
 445                 DRM_DEBUG("failed to restore crtc mode\n");
 446 }