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_put_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
 249         ret = radeon_framebuffer_init(rdev->ddev, &rfbdev->rfb, &mode_cmd, gobj);
 250         if (ret) {
 251                 DRM_ERROR("failed to initialize framebuffer %d\n", ret);
 252                 goto out;
 253         }
 254
 255         fb = &rfbdev->rfb.base;
 256
 257         /* setup helper */
 258         rfbdev->helper.fb = fb;
 259
 260         memset_io(rbo->kptr, 0x0, radeon_bo_size(rbo));
 261
 262         strcpy(info->fix.id, "radeondrmfb");
 263
 264         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth);
 265
 266         info->fbops = &radeonfb_ops;
 267
 268         tmp = radeon_bo_gpu_offset(rbo) - rdev->mc.vram_start;
 269         info->fix.smem_start = rdev->mc.aper_base + tmp;
 270         info->fix.smem_len = radeon_bo_size(rbo);
 271         info->screen_base = rbo->kptr;
 272         info->screen_size = radeon_bo_size(rbo);
 273
 274         drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height);
 275
 276         /* setup aperture base/size for vesafb takeover */
 277         info->apertures->ranges[0].base = rdev->ddev->mode_config.fb_base;
 278         info->apertures->ranges[0].size = rdev->mc.aper_size;
 279
 280         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 281
 282         if (info->screen_base == NULL) {
 283                 ret = -ENOSPC;
 284                 goto out;
 285         }
 286
 287         DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);
 288         DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)rdev->mc.aper_base);
 289         DRM_INFO("size %lu\n", (unsigned long)radeon_bo_size(rbo));
 290         DRM_INFO("fb depth is %d\n", fb->format->depth);
 291         DRM_INFO("   pitch is %d\n", fb->pitches[0]);
 292
 293         vga_switcheroo_client_fb_set(rdev->ddev->pdev, info);
 294         return 0;
 295
 296 out:
 297         if (rbo) {
 298
 299         }
 300         if (fb && ret) {
 301                 drm_gem_object_put_unlocked(gobj);
 302                 drm_framebuffer_unregister_private(fb);
 303                 drm_framebuffer_cleanup(fb);
 304                 kfree(fb);
 305         }
 306         return ret;
 307 }
 308
 309 static int radeon_fbdev_destroy(struct drm_device *dev, struct radeon_fbdev *rfbdev)
 310 {
 311         struct radeon_framebuffer *rfb = &rfbdev->rfb;
 312
 313         drm_fb_helper_unregister_fbi(&rfbdev->helper);
 314
 315         if (rfb->obj) {
 316                 radeonfb_destroy_pinned_object(rfb->obj);
 317                 rfb->obj = NULL;
 318                 drm_framebuffer_unregister_private(&rfb->base);
 319                 drm_framebuffer_cleanup(&rfb->base);
 320         }
 321         drm_fb_helper_fini(&rfbdev->helper);
 322
 323         return 0;
 324 }
 325
 326 static const struct drm_fb_helper_funcs radeon_fb_helper_funcs = {
 327         .fb_probe = radeonfb_create,
 328 };
 329
 330 int radeon_fbdev_init(struct radeon_device *rdev)
 331 {
 332         struct radeon_fbdev *rfbdev;
 333         int bpp_sel = 32;
 334         int ret;
 335
 336         /* don't enable fbdev if no connectors */
 337         if (list_empty(&rdev->ddev->mode_config.connector_list))
 338                 return 0;
 339
 340         /* select 8 bpp console on 8MB cards, or 16 bpp on RN50 or 32MB */
 341         if (rdev->mc.real_vram_size <= (8*1024*1024))
 342                 bpp_sel = 8;
 343         else if (ASIC_IS_RN50(rdev) ||
 344                  rdev->mc.real_vram_size <= (32*1024*1024))
 345                 bpp_sel = 16;
 346
 347         rfbdev = kzalloc(sizeof(struct radeon_fbdev), GFP_KERNEL);
 348         if (!rfbdev)
 349                 return -ENOMEM;
 350
 351         rfbdev->rdev = rdev;
 352         rdev->mode_info.rfbdev = rfbdev;
 353
 354         drm_fb_helper_prepare(rdev->ddev, &rfbdev->helper,
 355                               &radeon_fb_helper_funcs);
 356
 357         ret = drm_fb_helper_init(rdev->ddev, &rfbdev->helper,
 358                                  RADEONFB_CONN_LIMIT);
 359         if (ret)
 360                 goto free;
 361
 362         ret = drm_fb_helper_single_add_all_connectors(&rfbdev->helper);
 363         if (ret)
 364                 goto fini;
 365
 366         /* disable all the possible outputs/crtcs before entering KMS mode */
 367         drm_helper_disable_unused_functions(rdev->ddev);
 368
 369         ret = drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
 370         if (ret)
 371                 goto fini;
 372
 373         return 0;
 374
 375 fini:
 376         drm_fb_helper_fini(&rfbdev->helper);
 377 free:
 378         kfree(rfbdev);
 379         return ret;
 380 }
 381
 382 void radeon_fbdev_fini(struct radeon_device *rdev)
 383 {
 384         if (!rdev->mode_info.rfbdev)
 385                 return;
 386
 387         radeon_fbdev_destroy(rdev->ddev, rdev->mode_info.rfbdev);
 388         kfree(rdev->mode_info.rfbdev);
 389         rdev->mode_info.rfbdev = NULL;
 390 }
 391
 392 void radeon_fbdev_set_suspend(struct radeon_device *rdev, int state)
 393 {
 394         if (rdev->mode_info.rfbdev)
 395                 drm_fb_helper_set_suspend(&rdev->mode_info.rfbdev->helper, state);
 396 }
 397
 398 bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj)
 399 {
 400         if (!rdev->mode_info.rfbdev)
 401                 return false;
 402
 403         if (robj == gem_to_radeon_bo(rdev->mode_info.rfbdev->rfb.obj))
 404                 return true;
 405         return false;
 406 }
 407
 408 void radeon_fb_add_connector(struct radeon_device *rdev, struct drm_connector *connector)
 409 {
 410         if (rdev->mode_info.rfbdev)
 411                 drm_fb_helper_add_one_connector(&rdev->mode_info.rfbdev->helper, connector);
 412 }
 413
 414 void radeon_fb_remove_connector(struct radeon_device *rdev, struct drm_connector *connector)
 415 {
 416         if (rdev->mode_info.rfbdev)
 417                 drm_fb_helper_remove_one_connector(&rdev->mode_info.rfbdev->helper, connector);
 418 }