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
  27 #include <linux/module.h>
  28 #include <linux/pm_runtime.h>
  29 #include <linux/slab.h>
  30 #include <linux/vga_switcheroo.h>
  31
  32 #include <drm/amdgpu_drm.h>
  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
  38 #include "amdgpu.h"
  39 #include "cikd.h"
  40 #include "amdgpu_gem.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 drm_fb_helper *fb_helper = info->par;
  53         int ret = pm_runtime_get_sync(fb_helper->dev->dev);
  54         if (ret < 0 && ret != -EACCES) {
  55                 pm_runtime_mark_last_busy(fb_helper->dev->dev);
  56                 pm_runtime_put_autosuspend(fb_helper->dev->dev);
  57                 return ret;
  58         }
  59         return 0;
  60 }
  61
  62 static int
  63 amdgpufb_release(struct fb_info *info, int user)
  64 {
  65         struct drm_fb_helper *fb_helper = info->par;
  66
  67         pm_runtime_mark_last_busy(fb_helper->dev->dev);
  68         pm_runtime_put_autosuspend(fb_helper->dev->dev);
  69         return 0;
  70 }
  71
  72 static const struct fb_ops amdgpufb_ops = {
  73         .owner = THIS_MODULE,
  74         DRM_FB_HELPER_DEFAULT_OPS,
  75         .fb_open = amdgpufb_open,
  76         .fb_release = amdgpufb_release,
  77         .fb_fillrect = drm_fb_helper_cfb_fillrect,
  78         .fb_copyarea = drm_fb_helper_cfb_copyarea,
  79         .fb_imageblit = drm_fb_helper_cfb_imageblit,
  80 };
  81
  82
  83 int amdgpu_align_pitch(struct amdgpu_device *adev, int width, int cpp, bool tiled)
  84 {
  85         int aligned = width;
  86         int pitch_mask = 0;
  87
  88         switch (cpp) {
  89         case 1:
  90                 pitch_mask = 255;
  91                 break;
  92         case 2:
  93                 pitch_mask = 127;
  94                 break;
  95         case 3:
  96         case 4:
  97                 pitch_mask = 63;
  98                 break;
  99         }
 100
 101         aligned += pitch_mask;
 102         aligned &= ~pitch_mask;
 103         return aligned * cpp;
 104 }
 105
 106 static void amdgpufb_destroy_pinned_object(struct drm_gem_object *gobj)
 107 {
 108         struct amdgpu_bo *abo = gem_to_amdgpu_bo(gobj);
 109         int ret;
 110
 111         ret = amdgpu_bo_reserve(abo, true);
 112         if (likely(ret == 0)) {
 113                 amdgpu_bo_kunmap(abo);
 114                 amdgpu_bo_unpin(abo);
 115                 amdgpu_bo_unreserve(abo);
 116         }
 117         drm_gem_object_put_unlocked(gobj);
 118 }
 119
 120 static int amdgpufb_create_pinned_object(struct amdgpu_fbdev *rfbdev,
 121                                          struct drm_mode_fb_cmd2 *mode_cmd,
 122                                          struct drm_gem_object **gobj_p)
 123 {
 124         const struct drm_format_info *info;
 125         struct amdgpu_device *adev = rfbdev->adev;
 126         struct drm_gem_object *gobj = NULL;
 127         struct amdgpu_bo *abo = NULL;
 128         bool fb_tiled = false; /* useful for testing */
 129         u32 tiling_flags = 0, domain;
 130         int ret;
 131         int aligned_size, size;
 132         int height = mode_cmd->height;
 133         u32 cpp;
 134         u64 flags = AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
 135                                AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS     |
 136                                AMDGPU_GEM_CREATE_VRAM_CLEARED;
 137
 138         info = drm_get_format_info(adev->ddev, mode_cmd);
 139         cpp = info->cpp[0];
 140
 141         /* need to align pitch with crtc limits */
 142         mode_cmd->pitches[0] = amdgpu_align_pitch(adev, mode_cmd->width, cpp,
 143                                                   fb_tiled);
 144         domain = amdgpu_display_supported_domains(adev, flags);
 145         height = ALIGN(mode_cmd->height, 8);
 146         size = mode_cmd->pitches[0] * height;
 147         aligned_size = ALIGN(size, PAGE_SIZE);
 148         ret = amdgpu_gem_object_create(adev, aligned_size, 0, domain, flags,
 149                                        ttm_bo_type_kernel, NULL, &gobj);
 150         if (ret) {
 151                 pr_err("failed to allocate framebuffer (%d)\n", aligned_size);
 152                 return -ENOMEM;
 153         }
 154         abo = gem_to_amdgpu_bo(gobj);
 155
 156         if (fb_tiled)
 157                 tiling_flags = AMDGPU_TILING_SET(ARRAY_MODE, GRPH_ARRAY_2D_TILED_THIN1);
 158
 159         ret = amdgpu_bo_reserve(abo, false);
 160         if (unlikely(ret != 0))
 161                 goto out_unref;
 162
 163         if (tiling_flags) {
 164                 ret = amdgpu_bo_set_tiling_flags(abo,
 165                                                  tiling_flags);
 166                 if (ret)
 167                         dev_err(adev->dev, "FB failed to set tiling flags\n");
 168         }
 169
 170         ret = amdgpu_bo_pin(abo, domain);
 171         if (ret) {
 172                 amdgpu_bo_unreserve(abo);
 173                 goto out_unref;
 174         }
 175
 176         ret = amdgpu_ttm_alloc_gart(&abo->tbo);
 177         if (ret) {
 178                 amdgpu_bo_unreserve(abo);
 179                 dev_err(adev->dev, "%p bind failed\n", abo);
 180                 goto out_unref;
 181         }
 182
 183         ret = amdgpu_bo_kmap(abo, NULL);
 184         amdgpu_bo_unreserve(abo);
 185         if (ret) {
 186                 goto out_unref;
 187         }
 188
 189         *gobj_p = gobj;
 190         return 0;
 191 out_unref:
 192         amdgpufb_destroy_pinned_object(gobj);
 193         *gobj_p = NULL;
 194         return ret;
 195 }
 196
 197 static int amdgpufb_create(struct drm_fb_helper *helper,
 198                            struct drm_fb_helper_surface_size *sizes)
 199 {
 200         struct amdgpu_fbdev *rfbdev = (struct amdgpu_fbdev *)helper;
 201         struct amdgpu_device *adev = rfbdev->adev;
 202         struct fb_info *info;
 203         struct drm_framebuffer *fb = NULL;
 204         struct drm_mode_fb_cmd2 mode_cmd;
 205         struct drm_gem_object *gobj = NULL;
 206         struct amdgpu_bo *abo = NULL;
 207         int ret;
 208         unsigned long tmp;
 209
 210         mode_cmd.width = sizes->surface_width;
 211         mode_cmd.height = sizes->surface_height;
 212
 213         if (sizes->surface_bpp == 24)
 214                 sizes->surface_bpp = 32;
 215
 216         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 217                                                           sizes->surface_depth);
 218
 219         ret = amdgpufb_create_pinned_object(rfbdev, &mode_cmd, &gobj);
 220         if (ret) {
 221                 DRM_ERROR("failed to create fbcon object %d\n", ret);
 222                 return ret;
 223         }
 224
 225         abo = gem_to_amdgpu_bo(gobj);
 226
 227         /* okay we have an object now allocate the framebuffer */
 228         info = drm_fb_helper_alloc_fbi(helper);
 229         if (IS_ERR(info)) {
 230                 ret = PTR_ERR(info);
 231                 goto out;
 232         }
 233
 234         ret = amdgpu_display_framebuffer_init(adev->ddev, &rfbdev->rfb,
 235                                               &mode_cmd, gobj);
 236         if (ret) {
 237                 DRM_ERROR("failed to initialize framebuffer %d\n", ret);
 238                 goto out;
 239         }
 240
 241         fb = &rfbdev->rfb.base;
 242
 243         /* setup helper */
 244         rfbdev->helper.fb = fb;
 245
 246         info->fbops = &amdgpufb_ops;
 247
 248         tmp = amdgpu_bo_gpu_offset(abo) - adev->gmc.vram_start;
 249         info->fix.smem_start = adev->gmc.aper_base + tmp;
 250         info->fix.smem_len = amdgpu_bo_size(abo);
 251         info->screen_base = amdgpu_bo_kptr(abo);
 252         info->screen_size = amdgpu_bo_size(abo);
 253
 254         drm_fb_helper_fill_info(info, &rfbdev->helper, sizes);
 255
 256         /* setup aperture base/size for vesafb takeover */
 257         info->apertures->ranges[0].base = adev->ddev->mode_config.fb_base;
 258         info->apertures->ranges[0].size = adev->gmc.aper_size;
 259
 260         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 261
 262         if (info->screen_base == NULL) {
 263                 ret = -ENOSPC;
 264                 goto out;
 265         }
 266
 267         DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);
 268         DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)adev->gmc.aper_base);
 269         DRM_INFO("size %lu\n", (unsigned long)amdgpu_bo_size(abo));
 270         DRM_INFO("fb depth is %d\n", fb->format->depth);
 271         DRM_INFO("   pitch is %d\n", fb->pitches[0]);
 272
 273         vga_switcheroo_client_fb_set(adev->ddev->pdev, info);
 274         return 0;
 275
 276 out:
 277         if (abo) {
 278
 279         }
 280         if (fb && ret) {
 281                 drm_gem_object_put_unlocked(gobj);
 282                 drm_framebuffer_unregister_private(fb);
 283                 drm_framebuffer_cleanup(fb);
 284                 kfree(fb);
 285         }
 286         return ret;
 287 }
 288
 289 static int amdgpu_fbdev_destroy(struct drm_device *dev, struct amdgpu_fbdev *rfbdev)
 290 {
 291         struct amdgpu_framebuffer *rfb = &rfbdev->rfb;
 292
 293         drm_fb_helper_unregister_fbi(&rfbdev->helper);
 294
 295         if (rfb->base.obj[0]) {
 296                 amdgpufb_destroy_pinned_object(rfb->base.obj[0]);
 297                 rfb->base.obj[0] = NULL;
 298                 drm_framebuffer_unregister_private(&rfb->base);
 299                 drm_framebuffer_cleanup(&rfb->base);
 300         }
 301         drm_fb_helper_fini(&rfbdev->helper);
 302
 303         return 0;
 304 }
 305
 306 static const struct drm_fb_helper_funcs amdgpu_fb_helper_funcs = {
 307         .fb_probe = amdgpufb_create,
 308 };
 309
 310 int amdgpu_fbdev_init(struct amdgpu_device *adev)
 311 {
 312         struct amdgpu_fbdev *rfbdev;
 313         int bpp_sel = 32;
 314         int ret;
 315
 316         /* don't init fbdev on hw without DCE */
 317         if (!adev->mode_info.mode_config_initialized)
 318                 return 0;
 319
 320         /* don't init fbdev if there are no connectors */
 321         if (list_empty(&adev->ddev->mode_config.connector_list))
 322                 return 0;
 323
 324         /* select 8 bpp console on low vram cards */
 325         if (adev->gmc.real_vram_size <= (32*1024*1024))
 326                 bpp_sel = 8;
 327
 328         rfbdev = kzalloc(sizeof(struct amdgpu_fbdev), GFP_KERNEL);
 329         if (!rfbdev)
 330                 return -ENOMEM;
 331
 332         rfbdev->adev = adev;
 333         adev->mode_info.rfbdev = rfbdev;
 334
 335         drm_fb_helper_prepare(adev->ddev, &rfbdev->helper,
 336                         &amdgpu_fb_helper_funcs);
 337
 338         ret = drm_fb_helper_init(adev->ddev, &rfbdev->helper);
 339         if (ret) {
 340                 kfree(rfbdev);
 341                 return ret;
 342         }
 343
 344         /* disable all the possible outputs/crtcs before entering KMS mode */
 345         if (!amdgpu_device_has_dc_support(adev))
 346                 drm_helper_disable_unused_functions(adev->ddev);
 347
 348         drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
 349         return 0;
 350 }
 351
 352 void amdgpu_fbdev_fini(struct amdgpu_device *adev)
 353 {
 354         if (!adev->mode_info.rfbdev)
 355                 return;
 356
 357         amdgpu_fbdev_destroy(adev->ddev, adev->mode_info.rfbdev);
 358         kfree(adev->mode_info.rfbdev);
 359         adev->mode_info.rfbdev = NULL;
 360 }
 361
 362 void amdgpu_fbdev_set_suspend(struct amdgpu_device *adev, int state)
 363 {
 364         if (adev->mode_info.rfbdev)
 365                 drm_fb_helper_set_suspend_unlocked(&adev->mode_info.rfbdev->helper,
 366                                                    state);
 367 }
 368
 369 int amdgpu_fbdev_total_size(struct amdgpu_device *adev)
 370 {
 371         struct amdgpu_bo *robj;
 372         int size = 0;
 373
 374         if (!adev->mode_info.rfbdev)
 375                 return 0;
 376
 377         robj = gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.base.obj[0]);
 378         size += amdgpu_bo_size(robj);
 379         return size;
 380 }
 381
 382 bool amdgpu_fbdev_robj_is_fb(struct amdgpu_device *adev, struct amdgpu_bo *robj)
 383 {
 384         if (!adev->mode_info.rfbdev)
 385                 return false;
 386         if (robj == gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.base.obj[0]))
 387                 return true;
 388         return false;
 389 }