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                 pr_err("failed to allocate framebuffer (%d)\n", aligned_size);
 153                 return -ENOMEM;
 154         }
 155         rbo = gem_to_radeon_bo(gobj);
 156
 157         if (fb_tiled)
 158                 tiling_flags = RADEON_TILING_MACRO;
 159
 160 #ifdef __BIG_ENDIAN
 161         switch (cpp) {
 162         case 4:
 163                 tiling_flags |= RADEON_TILING_SWAP_32BIT;
 164                 break;
 165         case 2:
 166                 tiling_flags |= RADEON_TILING_SWAP_16BIT;
 167         default:
 168                 break;
 169         }
 170 #endif
 171
 172         if (tiling_flags) {
 173                 ret = radeon_bo_set_tiling_flags(rbo,
 174                                                  tiling_flags | RADEON_TILING_SURFACE,
 175                                                  mode_cmd->pitches[0]);
 176                 if (ret)
 177                         dev_err(rdev->dev, "FB failed to set tiling flags\n");
 178         }
 179
 180
 181         ret = radeon_bo_reserve(rbo, false);
 182         if (unlikely(ret != 0))
 183                 goto out_unref;
 184         /* Only 27 bit offset for legacy CRTC */
 185         ret = radeon_bo_pin_restricted(rbo, RADEON_GEM_DOMAIN_VRAM,
 186                                        ASIC_IS_AVIVO(rdev) ? 0 : 1 << 27,
 187                                        NULL);
 188         if (ret) {
 189                 radeon_bo_unreserve(rbo);
 190                 goto out_unref;
 191         }
 192         if (fb_tiled)
 193                 radeon_bo_check_tiling(rbo, 0, 0);
 194         ret = radeon_bo_kmap(rbo, NULL);
 195         radeon_bo_unreserve(rbo);
 196         if (ret) {
 197                 goto out_unref;
 198         }
 199
 200         *gobj_p = gobj;
 201         return 0;
 202 out_unref:
 203         radeonfb_destroy_pinned_object(gobj);
 204         *gobj_p = NULL;
 205         return ret;
 206 }
 207
 208 static int radeonfb_create(struct drm_fb_helper *helper,
 209                            struct drm_fb_helper_surface_size *sizes)
 210 {
 211         struct radeon_fbdev *rfbdev =
 212                 container_of(helper, struct radeon_fbdev, helper);
 213         struct radeon_device *rdev = rfbdev->rdev;
 214         struct fb_info *info;
 215         struct drm_framebuffer *fb = NULL;
 216         struct drm_mode_fb_cmd2 mode_cmd;
 217         struct drm_gem_object *gobj = NULL;
 218         struct radeon_bo *rbo = NULL;
 219         int ret;
 220         unsigned long tmp;
 221
 222         mode_cmd.width = sizes->surface_width;
 223         mode_cmd.height = sizes->surface_height;
 224
 225         /* avivo can't scanout real 24bpp */
 226         if ((sizes->surface_bpp == 24) && ASIC_IS_AVIVO(rdev))
 227                 sizes->surface_bpp = 32;
 228
 229         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 230                                                           sizes->surface_depth);
 231
 232         ret = radeonfb_create_pinned_object(rfbdev, &mode_cmd, &gobj);
 233         if (ret) {
 234                 DRM_ERROR("failed to create fbcon object %d\n", ret);
 235                 return ret;
 236         }
 237
 238         rbo = gem_to_radeon_bo(gobj);
 239
 240         /* okay we have an object now allocate the framebuffer */
 241         info = drm_fb_helper_alloc_fbi(helper);
 242         if (IS_ERR(info)) {
 243                 ret = PTR_ERR(info);
 244                 goto out;
 245         }
 246
 247         info->par = rfbdev;
 248         info->skip_vt_switch = true;
 249
 250         ret = radeon_framebuffer_init(rdev->ddev, &rfbdev->rfb, &mode_cmd, gobj);
 251         if (ret) {
 252                 DRM_ERROR("failed to initialize framebuffer %d\n", ret);
 253                 goto out;
 254         }
 255
 256         fb = &rfbdev->rfb.base;
 257
 258         /* setup helper */
 259         rfbdev->helper.fb = fb;
 260
 261         memset_io(rbo->kptr, 0x0, radeon_bo_size(rbo));
 262
 263         strcpy(info->fix.id, "radeondrmfb");
 264
 265         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth);
 266
 267         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 268         info->fbops = &radeonfb_ops;
 269
 270         tmp = radeon_bo_gpu_offset(rbo) - rdev->mc.vram_start;
 271         info->fix.smem_start = rdev->mc.aper_base + tmp;
 272         info->fix.smem_len = radeon_bo_size(rbo);
 273         info->screen_base = rbo->kptr;
 274         info->screen_size = radeon_bo_size(rbo);
 275
 276         drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height);
 277
 278         /* setup aperture base/size for vesafb takeover */
 279         info->apertures->ranges[0].base = rdev->ddev->mode_config.fb_base;
 280         info->apertures->ranges[0].size = rdev->mc.aper_size;
 281
 282         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 283
 284         if (info->screen_base == NULL) {
 285                 ret = -ENOSPC;
 286                 goto out;
 287         }
 288
 289         DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);
 290         DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)rdev->mc.aper_base);
 291         DRM_INFO("size %lu\n", (unsigned long)radeon_bo_size(rbo));
 292         DRM_INFO("fb depth is %d\n", fb->format->depth);
 293         DRM_INFO("   pitch is %d\n", fb->pitches[0]);
 294
 295         vga_switcheroo_client_fb_set(rdev->ddev->pdev, info);
 296         return 0;
 297
 298 out:
 299         if (rbo) {
 300
 301         }
 302         if (fb && ret) {
 303                 drm_gem_object_unreference_unlocked(gobj);
 304                 drm_framebuffer_unregister_private(fb);
 305                 drm_framebuffer_cleanup(fb);
 306                 kfree(fb);
 307         }
 308         return ret;
 309 }
 310
 311 void radeon_fb_output_poll_changed(struct radeon_device *rdev)
 312 {
 313         if (rdev->mode_info.rfbdev)
 314                 drm_fb_helper_hotplug_event(&rdev->mode_info.rfbdev->helper);
 315 }
 316
 317 static int radeon_fbdev_destroy(struct drm_device *dev, struct radeon_fbdev *rfbdev)
 318 {
 319         struct radeon_framebuffer *rfb = &rfbdev->rfb;
 320
 321         drm_fb_helper_unregister_fbi(&rfbdev->helper);
 322
 323         if (rfb->obj) {
 324                 radeonfb_destroy_pinned_object(rfb->obj);
 325                 rfb->obj = NULL;
 326         }
 327         drm_fb_helper_fini(&rfbdev->helper);
 328         drm_framebuffer_unregister_private(&rfb->base);
 329         drm_framebuffer_cleanup(&rfb->base);
 330
 331         return 0;
 332 }
 333
 334 static const struct drm_fb_helper_funcs radeon_fb_helper_funcs = {
 335         .gamma_set = radeon_crtc_fb_gamma_set,
 336         .gamma_get = radeon_crtc_fb_gamma_get,
 337         .fb_probe = radeonfb_create,
 338 };
 339
 340 int radeon_fbdev_init(struct radeon_device *rdev)
 341 {
 342         struct radeon_fbdev *rfbdev;
 343         int bpp_sel = 32;
 344         int ret;
 345
 346         /* don't enable fbdev if no connectors */
 347         if (list_empty(&rdev->ddev->mode_config.connector_list))
 348                 return 0;
 349
 350         /* select 8 bpp console on RN50 or 16MB cards */
 351         if (ASIC_IS_RN50(rdev) || rdev->mc.real_vram_size <= (32*1024*1024))
 352                 bpp_sel = 8;
 353
 354         rfbdev = kzalloc(sizeof(struct radeon_fbdev), GFP_KERNEL);
 355         if (!rfbdev)
 356                 return -ENOMEM;
 357
 358         rfbdev->rdev = rdev;
 359         rdev->mode_info.rfbdev = rfbdev;
 360
 361         drm_fb_helper_prepare(rdev->ddev, &rfbdev->helper,
 362                               &radeon_fb_helper_funcs);
 363
 364         ret = drm_fb_helper_init(rdev->ddev, &rfbdev->helper,
 365                                  RADEONFB_CONN_LIMIT);
 366         if (ret)
 367                 goto free;
 368
 369         ret = drm_fb_helper_single_add_all_connectors(&rfbdev->helper);
 370         if (ret)
 371                 goto fini;
 372
 373         /* disable all the possible outputs/crtcs before entering KMS mode */
 374         drm_helper_disable_unused_functions(rdev->ddev);
 375
 376         ret = drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
 377         if (ret)
 378                 goto fini;
 379
 380         return 0;
 381
 382 fini:
 383         drm_fb_helper_fini(&rfbdev->helper);
 384 free:
 385         kfree(rfbdev);
 386         return ret;
 387 }
 388
 389 void radeon_fbdev_fini(struct radeon_device *rdev)
 390 {
 391         if (!rdev->mode_info.rfbdev)
 392                 return;
 393
 394         radeon_fbdev_destroy(rdev->ddev, rdev->mode_info.rfbdev);
 395         kfree(rdev->mode_info.rfbdev);
 396         rdev->mode_info.rfbdev = NULL;
 397 }
 398
 399 void radeon_fbdev_set_suspend(struct radeon_device *rdev, int state)
 400 {
 401         if (rdev->mode_info.rfbdev)
 402                 drm_fb_helper_set_suspend(&rdev->mode_info.rfbdev->helper, state);
 403 }
 404
 405 bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj)
 406 {
 407         if (!rdev->mode_info.rfbdev)
 408                 return false;
 409
 410         if (robj == gem_to_radeon_bo(rdev->mode_info.rfbdev->rfb.obj))
 411                 return true;
 412         return false;
 413 }
 414
 415 void radeon_fb_add_connector(struct radeon_device *rdev, struct drm_connector *connector)
 416 {
 417         if (rdev->mode_info.rfbdev)
 418                 drm_fb_helper_add_one_connector(&rdev->mode_info.rfbdev->helper, connector);
 419 }
 420
 421 void radeon_fb_remove_connector(struct radeon_device *rdev, struct drm_connector *connector)
 422 {
 423         if (rdev->mode_info.rfbdev)
 424                 drm_fb_helper_remove_one_connector(&rdev->mode_info.rfbdev->helper, connector);
 425 }
 426
 427 void radeon_fbdev_restore_mode(struct radeon_device *rdev)
 428 {
 429         struct radeon_fbdev *rfbdev = rdev->mode_info.rfbdev;
 430         struct drm_fb_helper *fb_helper;
 431         int ret;
 432
 433         if (!rfbdev)
 434                 return;
 435
 436         fb_helper = &rfbdev->helper;
 437
 438         ret = drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper);
 439         if (ret)
 440                 DRM_DEBUG("failed to restore crtc mode\n");
 441 }