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