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         if (ret < 0 && ret != -EACCES) {
  58                 pm_runtime_mark_last_busy(rdev->ddev->dev);
  59                 pm_runtime_put_autosuspend(rdev->ddev->dev);
  60                 return ret;
  61         }
  62         return 0;
  63 }
  64
  65 static int
  66 radeonfb_release(struct fb_info *info, int user)
  67 {
  68         struct radeon_fbdev *rfbdev = info->par;
  69         struct radeon_device *rdev = rfbdev->rdev;
  70
  71         pm_runtime_mark_last_busy(rdev->ddev->dev);
  72         pm_runtime_put_autosuspend(rdev->ddev->dev);
  73         return 0;
  74 }
  75
  76 static const struct fb_ops radeonfb_ops = {
  77         .owner = THIS_MODULE,
  78         DRM_FB_HELPER_DEFAULT_OPS,
  79         .fb_open = radeonfb_open,
  80         .fb_release = radeonfb_release,
  81         .fb_fillrect = drm_fb_helper_cfb_fillrect,
  82         .fb_copyarea = drm_fb_helper_cfb_copyarea,
  83         .fb_imageblit = drm_fb_helper_cfb_imageblit,
  84 };
  85
  86
  87 int radeon_align_pitch(struct radeon_device *rdev, int width, int cpp, bool tiled)
  88 {
  89         int aligned = width;
  90         int align_large = (ASIC_IS_AVIVO(rdev)) || tiled;
  91         int pitch_mask = 0;
  92
  93         switch (cpp) {
  94         case 1:
  95                 pitch_mask = align_large ? 255 : 127;
  96                 break;
  97         case 2:
  98                 pitch_mask = align_large ? 127 : 31;
  99                 break;
 100         case 3:
 101         case 4:
 102                 pitch_mask = align_large ? 63 : 15;
 103                 break;
 104         }
 105
 106         aligned += pitch_mask;
 107         aligned &= ~pitch_mask;
 108         return aligned * cpp;
 109 }
 110
 111 static void radeonfb_destroy_pinned_object(struct drm_gem_object *gobj)
 112 {
 113         struct radeon_bo *rbo = gem_to_radeon_bo(gobj);
 114         int ret;
 115
 116         ret = radeon_bo_reserve(rbo, false);
 117         if (likely(ret == 0)) {
 118                 radeon_bo_kunmap(rbo);
 119                 radeon_bo_unpin(rbo);
 120                 radeon_bo_unreserve(rbo);
 121         }
 122         drm_gem_object_put(gobj);
 123 }
 124
 125 static int radeonfb_create_pinned_object(struct radeon_fbdev *rfbdev,
 126                                          struct drm_mode_fb_cmd2 *mode_cmd,
 127                                          struct drm_gem_object **gobj_p)
 128 {
 129         const struct drm_format_info *info;
 130         struct radeon_device *rdev = rfbdev->rdev;
 131         struct drm_gem_object *gobj = NULL;
 132         struct radeon_bo *rbo = NULL;
 133         bool fb_tiled = false; /* useful for testing */
 134         u32 tiling_flags = 0;
 135         int ret;
 136         int aligned_size, size;
 137         int height = mode_cmd->height;
 138         u32 cpp;
 139
 140         info = drm_get_format_info(rdev->ddev, mode_cmd);
 141         cpp = info->cpp[0];
 142
 143         /* need to align pitch with crtc limits */
 144         mode_cmd->pitches[0] = radeon_align_pitch(rdev, mode_cmd->width, cpp,
 145                                                   fb_tiled);
 146
 147         if (rdev->family >= CHIP_R600)
 148                 height = ALIGN(mode_cmd->height, 8);
 149         size = mode_cmd->pitches[0] * height;
 150         aligned_size = ALIGN(size, PAGE_SIZE);
 151         ret = radeon_gem_object_create(rdev, aligned_size, 0,
 152                                        RADEON_GEM_DOMAIN_VRAM,
 153                                        0, true, &gobj);
 154         if (ret) {
 155                 pr_err("failed to allocate framebuffer (%d)\n", aligned_size);
 156                 return -ENOMEM;
 157         }
 158         rbo = gem_to_radeon_bo(gobj);
 159
 160         if (fb_tiled)
 161                 tiling_flags = RADEON_TILING_MACRO;
 162
 163 #ifdef __BIG_ENDIAN
 164         switch (cpp) {
 165         case 4:
 166                 tiling_flags |= RADEON_TILING_SWAP_32BIT;
 167                 break;
 168         case 2:
 169                 tiling_flags |= RADEON_TILING_SWAP_16BIT;
 170         default:
 171                 break;
 172         }
 173 #endif
 174
 175         if (tiling_flags) {
 176                 ret = radeon_bo_set_tiling_flags(rbo,
 177                                                  tiling_flags | RADEON_TILING_SURFACE,
 178                                                  mode_cmd->pitches[0]);
 179                 if (ret)
 180                         dev_err(rdev->dev, "FB failed to set tiling flags\n");
 181         }
 182
 183
 184         ret = radeon_bo_reserve(rbo, false);
 185         if (unlikely(ret != 0))
 186                 goto out_unref;
 187         /* Only 27 bit offset for legacy CRTC */
 188         ret = radeon_bo_pin_restricted(rbo, RADEON_GEM_DOMAIN_VRAM,
 189                                        ASIC_IS_AVIVO(rdev) ? 0 : 1 << 27,
 190                                        NULL);
 191         if (ret) {
 192                 radeon_bo_unreserve(rbo);
 193                 goto out_unref;
 194         }
 195         if (fb_tiled)
 196                 radeon_bo_check_tiling(rbo, 0, 0);
 197         ret = radeon_bo_kmap(rbo, NULL);
 198         radeon_bo_unreserve(rbo);
 199         if (ret) {
 200                 goto out_unref;
 201         }
 202
 203         *gobj_p = gobj;
 204         return 0;
 205 out_unref:
 206         radeonfb_destroy_pinned_object(gobj);
 207         *gobj_p = NULL;
 208         return ret;
 209 }
 210
 211 static int radeonfb_create(struct drm_fb_helper *helper,
 212                            struct drm_fb_helper_surface_size *sizes)
 213 {
 214         struct radeon_fbdev *rfbdev =
 215                 container_of(helper, struct radeon_fbdev, helper);
 216         struct radeon_device *rdev = rfbdev->rdev;
 217         struct fb_info *info;
 218         struct drm_framebuffer *fb = NULL;
 219         struct drm_mode_fb_cmd2 mode_cmd;
 220         struct drm_gem_object *gobj = NULL;
 221         struct radeon_bo *rbo = NULL;
 222         int ret;
 223         unsigned long tmp;
 224
 225         mode_cmd.width = sizes->surface_width;
 226         mode_cmd.height = sizes->surface_height;
 227
 228         /* avivo can't scanout real 24bpp */
 229         if ((sizes->surface_bpp == 24) && ASIC_IS_AVIVO(rdev))
 230                 sizes->surface_bpp = 32;
 231
 232         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 233                                                           sizes->surface_depth);
 234
 235         ret = radeonfb_create_pinned_object(rfbdev, &mode_cmd, &gobj);
 236         if (ret) {
 237                 DRM_ERROR("failed to create fbcon object %d\n", ret);
 238                 return ret;
 239         }
 240
 241         rbo = gem_to_radeon_bo(gobj);
 242
 243         /* okay we have an object now allocate the framebuffer */
 244         info = drm_fb_helper_alloc_fbi(helper);
 245         if (IS_ERR(info)) {
 246                 ret = PTR_ERR(info);
 247                 goto out;
 248         }
 249
 250         /* radeon resume is fragile and needs a vt switch to help it along */
 251         info->skip_vt_switch = false;
 252
 253         ret = radeon_framebuffer_init(rdev->ddev, &rfbdev->fb, &mode_cmd, gobj);
 254         if (ret) {
 255                 DRM_ERROR("failed to initialize framebuffer %d\n", ret);
 256                 goto out;
 257         }
 258
 259         fb = &rfbdev->fb;
 260
 261         /* setup helper */
 262         rfbdev->helper.fb = fb;
 263
 264         memset_io(rbo->kptr, 0x0, radeon_bo_size(rbo));
 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_info(info, &rfbdev->helper, sizes);
 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(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 drm_framebuffer *fb = &rfbdev->fb;
 312
 313         drm_fb_helper_unregister_fbi(&rfbdev->helper);
 314
 315         if (fb->obj[0]) {
 316                 radeonfb_destroy_pinned_object(fb->obj[0]);
 317                 fb->obj[0] = NULL;
 318                 drm_framebuffer_unregister_private(fb);
 319                 drm_framebuffer_cleanup(fb);
 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         if (ret)
 359                 goto free;
 360
 361         /* disable all the possible outputs/crtcs before entering KMS mode */
 362         drm_helper_disable_unused_functions(rdev->ddev);
 363
 364         ret = drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
 365         if (ret)
 366                 goto fini;
 367
 368         return 0;
 369
 370 fini:
 371         drm_fb_helper_fini(&rfbdev->helper);
 372 free:
 373         kfree(rfbdev);
 374         return ret;
 375 }
 376
 377 void radeon_fbdev_fini(struct radeon_device *rdev)
 378 {
 379         if (!rdev->mode_info.rfbdev)
 380                 return;
 381
 382         radeon_fbdev_destroy(rdev->ddev, rdev->mode_info.rfbdev);
 383         kfree(rdev->mode_info.rfbdev);
 384         rdev->mode_info.rfbdev = NULL;
 385 }
 386
 387 void radeon_fbdev_set_suspend(struct radeon_device *rdev, int state)
 388 {
 389         if (rdev->mode_info.rfbdev)
 390                 drm_fb_helper_set_suspend(&rdev->mode_info.rfbdev->helper, state);
 391 }
 392
 393 bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj)
 394 {
 395         if (!rdev->mode_info.rfbdev)
 396                 return false;
 397
 398         if (robj == gem_to_radeon_bo(rdev->mode_info.rfbdev->fb.obj[0]))
 399                 return true;
 400         return false;
 401 }