drivers/gpu/drm/amd/amdgpu/amdgpu_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/amdgpu_drm.h>
  34 #include "amdgpu.h"
  35 #include "cikd.h"
  36 #include "amdgpu_gem.h"
  37
  38 #include <drm/drm_fb_helper.h>
  39
  40 #include <linux/vga_switcheroo.h>
  41
  42 #include "amdgpu_display.h"
  43
  44 /* object hierarchy -
  45    this contains a helper + a amdgpu fb
  46    the helper contains a pointer to amdgpu framebuffer baseclass.
  47 */
  48
  49 static int
  50 amdgpufb_open(struct fb_info *info, int user)
  51 {
  52         struct amdgpu_fbdev *rfbdev = info->par;
  53         struct amdgpu_device *adev = rfbdev->adev;
  54         int ret = pm_runtime_get_sync(adev->ddev->dev);
  55         if (ret < 0 && ret != -EACCES) {
  56                 pm_runtime_mark_last_busy(adev->ddev->dev);
  57                 pm_runtime_put_autosuspend(adev->ddev->dev);
  58                 return ret;
  59         }
  60         return 0;
  61 }
  62
  63 static int
  64 amdgpufb_release(struct fb_info *info, int user)
  65 {
  66         struct amdgpu_fbdev *rfbdev = info->par;
  67         struct amdgpu_device *adev = rfbdev->adev;
  68
  69         pm_runtime_mark_last_busy(adev->ddev->dev);
  70         pm_runtime_put_autosuspend(adev->ddev->dev);
  71         return 0;
  72 }
  73
  74 static struct fb_ops amdgpufb_ops = {
  75         .owner = THIS_MODULE,
  76         DRM_FB_HELPER_DEFAULT_OPS,
  77         .fb_open = amdgpufb_open,
  78         .fb_release = amdgpufb_release,
  79         .fb_fillrect = drm_fb_helper_cfb_fillrect,
  80         .fb_copyarea = drm_fb_helper_cfb_copyarea,
  81         .fb_imageblit = drm_fb_helper_cfb_imageblit,
  82 };
  83
  84
  85 int amdgpu_align_pitch(struct amdgpu_device *adev, int width, int cpp, bool tiled)
  86 {
  87         int aligned = width;
  88         int pitch_mask = 0;
  89
  90         switch (cpp) {
  91         case 1:
  92                 pitch_mask = 255;
  93                 break;
  94         case 2:
  95                 pitch_mask = 127;
  96                 break;
  97         case 3:
  98         case 4:
  99                 pitch_mask = 63;
 100                 break;
 101         }
 102
 103         aligned += pitch_mask;
 104         aligned &= ~pitch_mask;
 105         return aligned * cpp;
 106 }
 107
 108 static void amdgpufb_destroy_pinned_object(struct drm_gem_object *gobj)
 109 {
 110         struct amdgpu_bo *abo = gem_to_amdgpu_bo(gobj);
 111         int ret;
 112
 113         ret = amdgpu_bo_reserve(abo, true);
 114         if (likely(ret == 0)) {
 115                 amdgpu_bo_kunmap(abo);
 116                 amdgpu_bo_unpin(abo);
 117                 amdgpu_bo_unreserve(abo);
 118         }
 119         drm_gem_object_put_unlocked(gobj);
 120 }
 121
 122 static int amdgpufb_create_pinned_object(struct amdgpu_fbdev *rfbdev,
 123                                          struct drm_mode_fb_cmd2 *mode_cmd,
 124                                          struct drm_gem_object **gobj_p)
 125 {
 126         struct amdgpu_device *adev = rfbdev->adev;
 127         struct drm_gem_object *gobj = NULL;
 128         struct amdgpu_bo *abo = NULL;
 129         bool fb_tiled = false; /* useful for testing */
 130         u32 tiling_flags = 0, domain;
 131         int ret;
 132         int aligned_size, size;
 133         int height = mode_cmd->height;
 134         u32 cpp;
 135
 136         cpp = drm_format_plane_cpp(mode_cmd->pixel_format, 0);
 137
 138         /* need to align pitch with crtc limits */
 139         mode_cmd->pitches[0] = amdgpu_align_pitch(adev, mode_cmd->width, cpp,
 140                                                   fb_tiled);
 141         domain = amdgpu_display_supported_domains(adev);
 142
 143         height = ALIGN(mode_cmd->height, 8);
 144         size = mode_cmd->pitches[0] * height;
 145         aligned_size = ALIGN(size, PAGE_SIZE);
 146         ret = amdgpu_gem_object_create(adev, aligned_size, 0, domain,
 147                                        AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
 148                                        AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS |
 149                                        AMDGPU_GEM_CREATE_VRAM_CLEARED,
 150                                        ttm_bo_type_kernel, NULL, &gobj);
 151         if (ret) {
 152                 pr_err("failed to allocate framebuffer (%d)\n", aligned_size);
 153                 return -ENOMEM;
 154         }
 155         abo = gem_to_amdgpu_bo(gobj);
 156
 157         if (fb_tiled)
 158                 tiling_flags = AMDGPU_TILING_SET(ARRAY_MODE, GRPH_ARRAY_2D_TILED_THIN1);
 159
 160         ret = amdgpu_bo_reserve(abo, false);
 161         if (unlikely(ret != 0))
 162                 goto out_unref;
 163
 164         if (tiling_flags) {
 165                 ret = amdgpu_bo_set_tiling_flags(abo,
 166                                                  tiling_flags);
 167                 if (ret)
 168                         dev_err(adev->dev, "FB failed to set tiling flags\n");
 169         }
 170
 171
 172         ret = amdgpu_bo_pin(abo, domain);
 173         if (ret) {
 174                 amdgpu_bo_unreserve(abo);
 175                 goto out_unref;
 176         }
 177
 178         ret = amdgpu_ttm_alloc_gart(&abo->tbo);
 179         if (ret) {
 180                 amdgpu_bo_unreserve(abo);
 181                 dev_err(adev->dev, "%p bind failed\n", abo);
 182                 goto out_unref;
 183         }
 184
 185         ret = amdgpu_bo_kmap(abo, NULL);
 186         amdgpu_bo_unreserve(abo);
 187         if (ret) {
 188                 goto out_unref;
 189         }
 190
 191         *gobj_p = gobj;
 192         return 0;
 193 out_unref:
 194         amdgpufb_destroy_pinned_object(gobj);
 195         *gobj_p = NULL;
 196         return ret;
 197 }
 198
 199 static int amdgpufb_create(struct drm_fb_helper *helper,
 200                            struct drm_fb_helper_surface_size *sizes)
 201 {
 202         struct amdgpu_fbdev *rfbdev = (struct amdgpu_fbdev *)helper;
 203         struct amdgpu_device *adev = rfbdev->adev;
 204         struct fb_info *info;
 205         struct drm_framebuffer *fb = NULL;
 206         struct drm_mode_fb_cmd2 mode_cmd;
 207         struct drm_gem_object *gobj = NULL;
 208         struct amdgpu_bo *abo = NULL;
 209         int ret;
 210         unsigned long tmp;
 211
 212         mode_cmd.width = sizes->surface_width;
 213         mode_cmd.height = sizes->surface_height;
 214
 215         if (sizes->surface_bpp == 24)
 216                 sizes->surface_bpp = 32;
 217
 218         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 219                                                           sizes->surface_depth);
 220
 221         ret = amdgpufb_create_pinned_object(rfbdev, &mode_cmd, &gobj);
 222         if (ret) {
 223                 DRM_ERROR("failed to create fbcon object %d\n", ret);
 224                 return ret;
 225         }
 226
 227         abo = gem_to_amdgpu_bo(gobj);
 228
 229         /* okay we have an object now allocate the framebuffer */
 230         info = drm_fb_helper_alloc_fbi(helper);
 231         if (IS_ERR(info)) {
 232                 ret = PTR_ERR(info);
 233                 goto out;
 234         }
 235
 236         info->par = rfbdev;
 237         info->skip_vt_switch = true;
 238
 239         ret = amdgpu_display_framebuffer_init(adev->ddev, &rfbdev->rfb,
 240                                               &mode_cmd, gobj);
 241         if (ret) {
 242                 DRM_ERROR("failed to initialize framebuffer %d\n", ret);
 243                 goto out;
 244         }
 245
 246         fb = &rfbdev->rfb.base;
 247
 248         /* setup helper */
 249         rfbdev->helper.fb = fb;
 250
 251         strcpy(info->fix.id, "amdgpudrmfb");
 252
 253         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth);
 254
 255         info->fbops = &amdgpufb_ops;
 256
 257         tmp = amdgpu_bo_gpu_offset(abo) - adev->gmc.vram_start;
 258         info->fix.smem_start = adev->gmc.aper_base + tmp;
 259         info->fix.smem_len = amdgpu_bo_size(abo);
 260         info->screen_base = amdgpu_bo_kptr(abo);
 261         info->screen_size = amdgpu_bo_size(abo);
 262
 263         drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height);
 264
 265         /* setup aperture base/size for vesafb takeover */
 266         info->apertures->ranges[0].base = adev->ddev->mode_config.fb_base;
 267         info->apertures->ranges[0].size = adev->gmc.aper_size;
 268
 269         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 270
 271         if (info->screen_base == NULL) {
 272                 ret = -ENOSPC;
 273                 goto out;
 274         }
 275
 276         DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);
 277         DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)adev->gmc.aper_base);
 278         DRM_INFO("size %lu\n", (unsigned long)amdgpu_bo_size(abo));
 279         DRM_INFO("fb depth is %d\n", fb->format->depth);
 280         DRM_INFO("   pitch is %d\n", fb->pitches[0]);
 281
 282         vga_switcheroo_client_fb_set(adev->ddev->pdev, info);
 283         return 0;
 284
 285 out:
 286         if (abo) {
 287
 288         }
 289         if (fb && ret) {
 290                 drm_gem_object_put_unlocked(gobj);
 291                 drm_framebuffer_unregister_private(fb);
 292                 drm_framebuffer_cleanup(fb);
 293                 kfree(fb);
 294         }
 295         return ret;
 296 }
 297
 298 static int amdgpu_fbdev_destroy(struct drm_device *dev, struct amdgpu_fbdev *rfbdev)
 299 {
 300         struct amdgpu_framebuffer *rfb = &rfbdev->rfb;
 301
 302         drm_fb_helper_unregister_fbi(&rfbdev->helper);
 303
 304         if (rfb->base.obj[0]) {
 305                 amdgpufb_destroy_pinned_object(rfb->base.obj[0]);
 306                 rfb->base.obj[0] = NULL;
 307                 drm_framebuffer_unregister_private(&rfb->base);
 308                 drm_framebuffer_cleanup(&rfb->base);
 309         }
 310         drm_fb_helper_fini(&rfbdev->helper);
 311
 312         return 0;
 313 }
 314
 315 static const struct drm_fb_helper_funcs amdgpu_fb_helper_funcs = {
 316         .fb_probe = amdgpufb_create,
 317 };
 318
 319 int amdgpu_fbdev_init(struct amdgpu_device *adev)
 320 {
 321         struct amdgpu_fbdev *rfbdev;
 322         int bpp_sel = 32;
 323         int ret;
 324
 325         /* don't init fbdev on hw without DCE */
 326         if (!adev->mode_info.mode_config_initialized)
 327                 return 0;
 328
 329         /* don't init fbdev if there are no connectors */
 330         if (list_empty(&adev->ddev->mode_config.connector_list))
 331                 return 0;
 332
 333         /* select 8 bpp console on low vram cards */
 334         if (adev->gmc.real_vram_size <= (32*1024*1024))
 335                 bpp_sel = 8;
 336
 337         rfbdev = kzalloc(sizeof(struct amdgpu_fbdev), GFP_KERNEL);
 338         if (!rfbdev)
 339                 return -ENOMEM;
 340
 341         rfbdev->adev = adev;
 342         adev->mode_info.rfbdev = rfbdev;
 343
 344         drm_fb_helper_prepare(adev->ddev, &rfbdev->helper,
 345                         &amdgpu_fb_helper_funcs);
 346
 347         ret = drm_fb_helper_init(adev->ddev, &rfbdev->helper,
 348                                  AMDGPUFB_CONN_LIMIT);
 349         if (ret) {
 350                 kfree(rfbdev);
 351                 return ret;
 352         }
 353
 354         drm_fb_helper_single_add_all_connectors(&rfbdev->helper);
 355
 356         /* disable all the possible outputs/crtcs before entering KMS mode */
 357         if (!amdgpu_device_has_dc_support(adev))
 358                 drm_helper_disable_unused_functions(adev->ddev);
 359
 360         drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
 361         return 0;
 362 }
 363
 364 void amdgpu_fbdev_fini(struct amdgpu_device *adev)
 365 {
 366         if (!adev->mode_info.rfbdev)
 367                 return;
 368
 369         amdgpu_fbdev_destroy(adev->ddev, adev->mode_info.rfbdev);
 370         kfree(adev->mode_info.rfbdev);
 371         adev->mode_info.rfbdev = NULL;
 372 }
 373
 374 void amdgpu_fbdev_set_suspend(struct amdgpu_device *adev, int state)
 375 {
 376         if (adev->mode_info.rfbdev)
 377                 drm_fb_helper_set_suspend_unlocked(&adev->mode_info.rfbdev->helper,
 378                                                    state);
 379 }
 380
 381 int amdgpu_fbdev_total_size(struct amdgpu_device *adev)
 382 {
 383         struct amdgpu_bo *robj;
 384         int size = 0;
 385
 386         if (!adev->mode_info.rfbdev)
 387                 return 0;
 388
 389         robj = gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.base.obj[0]);
 390         size += amdgpu_bo_size(robj);
 391         return size;
 392 }
 393
 394 bool amdgpu_fbdev_robj_is_fb(struct amdgpu_device *adev, struct amdgpu_bo *robj)
 395 {
 396         if (!adev->mode_info.rfbdev)
 397                 return false;
 398         if (robj == gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.base.obj[0]))
 399                 return true;
 400         return false;
 401 }