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
  37 #include <drm/drm_fb_helper.h>
  38
  39 #include <linux/vga_switcheroo.h>
  40
  41 /* object hierarchy -
  42    this contains a helper + a amdgpu fb
  43    the helper contains a pointer to amdgpu framebuffer baseclass.
  44 */
  45
  46 static int
  47 amdgpufb_open(struct fb_info *info, int user)
  48 {
  49         struct amdgpu_fbdev *rfbdev = info->par;
  50         struct amdgpu_device *adev = rfbdev->adev;
  51         int ret = pm_runtime_get_sync(adev->ddev->dev);
  52         if (ret < 0 && ret != -EACCES) {
  53                 pm_runtime_mark_last_busy(adev->ddev->dev);
  54                 pm_runtime_put_autosuspend(adev->ddev->dev);
  55                 return ret;
  56         }
  57         return 0;
  58 }
  59
  60 static int
  61 amdgpufb_release(struct fb_info *info, int user)
  62 {
  63         struct amdgpu_fbdev *rfbdev = info->par;
  64         struct amdgpu_device *adev = rfbdev->adev;
  65
  66         pm_runtime_mark_last_busy(adev->ddev->dev);
  67         pm_runtime_put_autosuspend(adev->ddev->dev);
  68         return 0;
  69 }
  70
  71 static struct fb_ops amdgpufb_ops = {
  72         .owner = THIS_MODULE,
  73         DRM_FB_HELPER_DEFAULT_OPS,
  74         .fb_open = amdgpufb_open,
  75         .fb_release = amdgpufb_release,
  76         .fb_fillrect = drm_fb_helper_cfb_fillrect,
  77         .fb_copyarea = drm_fb_helper_cfb_copyarea,
  78         .fb_imageblit = drm_fb_helper_cfb_imageblit,
  79 };
  80
  81
  82 int amdgpu_align_pitch(struct amdgpu_device *adev, int width, int cpp, bool tiled)
  83 {
  84         int aligned = width;
  85         int pitch_mask = 0;
  86
  87         switch (cpp) {
  88         case 1:
  89                 pitch_mask = 255;
  90                 break;
  91         case 2:
  92                 pitch_mask = 127;
  93                 break;
  94         case 3:
  95         case 4:
  96                 pitch_mask = 63;
  97                 break;
  98         }
  99
 100         aligned += pitch_mask;
 101         aligned &= ~pitch_mask;
 102         return aligned * cpp;
 103 }
 104
 105 static void amdgpufb_destroy_pinned_object(struct drm_gem_object *gobj)
 106 {
 107         struct amdgpu_bo *abo = gem_to_amdgpu_bo(gobj);
 108         int ret;
 109
 110         ret = amdgpu_bo_reserve(abo, true);
 111         if (likely(ret == 0)) {
 112                 amdgpu_bo_kunmap(abo);
 113                 amdgpu_bo_unpin(abo);
 114                 amdgpu_bo_unreserve(abo);
 115         }
 116         drm_gem_object_put_unlocked(gobj);
 117 }
 118
 119 static int amdgpufb_create_pinned_object(struct amdgpu_fbdev *rfbdev,
 120                                          struct drm_mode_fb_cmd2 *mode_cmd,
 121                                          struct drm_gem_object **gobj_p)
 122 {
 123         struct amdgpu_device *adev = rfbdev->adev;
 124         struct drm_gem_object *gobj = NULL;
 125         struct amdgpu_bo *abo = NULL;
 126         bool fb_tiled = false; /* useful for testing */
 127         u32 tiling_flags = 0;
 128         int ret;
 129         int aligned_size, size;
 130         int height = mode_cmd->height;
 131         u32 cpp;
 132
 133         cpp = drm_format_plane_cpp(mode_cmd->pixel_format, 0);
 134
 135         /* need to align pitch with crtc limits */
 136         mode_cmd->pitches[0] = amdgpu_align_pitch(adev, mode_cmd->width, cpp,
 137                                                   fb_tiled);
 138
 139         height = ALIGN(mode_cmd->height, 8);
 140         size = mode_cmd->pitches[0] * height;
 141         aligned_size = ALIGN(size, PAGE_SIZE);
 142         ret = amdgpu_gem_object_create(adev, aligned_size, 0,
 143                                        AMDGPU_GEM_DOMAIN_VRAM,
 144                                        AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
 145                                        AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS |
 146                                        AMDGPU_GEM_CREATE_VRAM_CLEARED,
 147                                        true, NULL, &gobj);
 148         if (ret) {
 149                 pr_err("failed to allocate framebuffer (%d)\n", aligned_size);
 150                 return -ENOMEM;
 151         }
 152         abo = gem_to_amdgpu_bo(gobj);
 153
 154         if (fb_tiled)
 155                 tiling_flags = AMDGPU_TILING_SET(ARRAY_MODE, GRPH_ARRAY_2D_TILED_THIN1);
 156
 157         ret = amdgpu_bo_reserve(abo, false);
 158         if (unlikely(ret != 0))
 159                 goto out_unref;
 160
 161         if (tiling_flags) {
 162                 ret = amdgpu_bo_set_tiling_flags(abo,
 163                                                  tiling_flags);
 164                 if (ret)
 165                         dev_err(adev->dev, "FB failed to set tiling flags\n");
 166         }
 167
 168
 169         ret = amdgpu_bo_pin(abo, AMDGPU_GEM_DOMAIN_VRAM, NULL);
 170         if (ret) {
 171                 amdgpu_bo_unreserve(abo);
 172                 goto out_unref;
 173         }
 174         ret = amdgpu_bo_kmap(abo, NULL);
 175         amdgpu_bo_unreserve(abo);
 176         if (ret) {
 177                 goto out_unref;
 178         }
 179
 180         *gobj_p = gobj;
 181         return 0;
 182 out_unref:
 183         amdgpufb_destroy_pinned_object(gobj);
 184         *gobj_p = NULL;
 185         return ret;
 186 }
 187
 188 static int amdgpufb_create(struct drm_fb_helper *helper,
 189                            struct drm_fb_helper_surface_size *sizes)
 190 {
 191         struct amdgpu_fbdev *rfbdev = (struct amdgpu_fbdev *)helper;
 192         struct amdgpu_device *adev = rfbdev->adev;
 193         struct fb_info *info;
 194         struct drm_framebuffer *fb = NULL;
 195         struct drm_mode_fb_cmd2 mode_cmd;
 196         struct drm_gem_object *gobj = NULL;
 197         struct amdgpu_bo *abo = NULL;
 198         int ret;
 199         unsigned long tmp;
 200
 201         mode_cmd.width = sizes->surface_width;
 202         mode_cmd.height = sizes->surface_height;
 203
 204         if (sizes->surface_bpp == 24)
 205                 sizes->surface_bpp = 32;
 206
 207         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 208                                                           sizes->surface_depth);
 209
 210         ret = amdgpufb_create_pinned_object(rfbdev, &mode_cmd, &gobj);
 211         if (ret) {
 212                 DRM_ERROR("failed to create fbcon object %d\n", ret);
 213                 return ret;
 214         }
 215
 216         abo = gem_to_amdgpu_bo(gobj);
 217
 218         /* okay we have an object now allocate the framebuffer */
 219         info = drm_fb_helper_alloc_fbi(helper);
 220         if (IS_ERR(info)) {
 221                 ret = PTR_ERR(info);
 222                 goto out;
 223         }
 224
 225         info->par = rfbdev;
 226         info->skip_vt_switch = true;
 227
 228         ret = amdgpu_framebuffer_init(adev->ddev, &rfbdev->rfb, &mode_cmd, gobj);
 229         if (ret) {
 230                 DRM_ERROR("failed to initialize framebuffer %d\n", ret);
 231                 goto out;
 232         }
 233
 234         fb = &rfbdev->rfb.base;
 235
 236         /* setup helper */
 237         rfbdev->helper.fb = fb;
 238
 239         strcpy(info->fix.id, "amdgpudrmfb");
 240
 241         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth);
 242
 243         info->fbops = &amdgpufb_ops;
 244
 245         tmp = amdgpu_bo_gpu_offset(abo) - adev->mc.vram_start;
 246         info->fix.smem_start = adev->mc.aper_base + tmp;
 247         info->fix.smem_len = amdgpu_bo_size(abo);
 248         info->screen_base = amdgpu_bo_kptr(abo);
 249         info->screen_size = amdgpu_bo_size(abo);
 250
 251         drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height);
 252
 253         /* setup aperture base/size for vesafb takeover */
 254         info->apertures->ranges[0].base = adev->ddev->mode_config.fb_base;
 255         info->apertures->ranges[0].size = adev->mc.aper_size;
 256
 257         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 258
 259         if (info->screen_base == NULL) {
 260                 ret = -ENOSPC;
 261                 goto out;
 262         }
 263
 264         DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);
 265         DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)adev->mc.aper_base);
 266         DRM_INFO("size %lu\n", (unsigned long)amdgpu_bo_size(abo));
 267         DRM_INFO("fb depth is %d\n", fb->format->depth);
 268         DRM_INFO("   pitch is %d\n", fb->pitches[0]);
 269
 270         vga_switcheroo_client_fb_set(adev->ddev->pdev, info);
 271         return 0;
 272
 273 out:
 274         if (abo) {
 275
 276         }
 277         if (fb && ret) {
 278                 drm_gem_object_put_unlocked(gobj);
 279                 drm_framebuffer_unregister_private(fb);
 280                 drm_framebuffer_cleanup(fb);
 281                 kfree(fb);
 282         }
 283         return ret;
 284 }
 285
 286 void amdgpu_fb_output_poll_changed(struct amdgpu_device *adev)
 287 {
 288         if (adev->mode_info.rfbdev)
 289                 drm_fb_helper_hotplug_event(&adev->mode_info.rfbdev->helper);
 290 }
 291
 292 static int amdgpu_fbdev_destroy(struct drm_device *dev, struct amdgpu_fbdev *rfbdev)
 293 {
 294         struct amdgpu_framebuffer *rfb = &rfbdev->rfb;
 295
 296         drm_fb_helper_unregister_fbi(&rfbdev->helper);
 297
 298         if (rfb->obj) {
 299                 amdgpufb_destroy_pinned_object(rfb->obj);
 300                 rfb->obj = NULL;
 301                 drm_framebuffer_unregister_private(&rfb->base);
 302                 drm_framebuffer_cleanup(&rfb->base);
 303         }
 304         drm_fb_helper_fini(&rfbdev->helper);
 305
 306         return 0;
 307 }
 308
 309 static const struct drm_fb_helper_funcs amdgpu_fb_helper_funcs = {
 310         .fb_probe = amdgpufb_create,
 311 };
 312
 313 int amdgpu_fbdev_init(struct amdgpu_device *adev)
 314 {
 315         struct amdgpu_fbdev *rfbdev;
 316         int bpp_sel = 32;
 317         int ret;
 318
 319         /* don't init fbdev on hw without DCE */
 320         if (!adev->mode_info.mode_config_initialized)
 321                 return 0;
 322
 323         /* don't init fbdev if there are no connectors */
 324         if (list_empty(&adev->ddev->mode_config.connector_list))
 325                 return 0;
 326
 327         /* select 8 bpp console on low vram cards */
 328         if (adev->mc.real_vram_size <= (32*1024*1024))
 329                 bpp_sel = 8;
 330
 331         rfbdev = kzalloc(sizeof(struct amdgpu_fbdev), GFP_KERNEL);
 332         if (!rfbdev)
 333                 return -ENOMEM;
 334
 335         rfbdev->adev = adev;
 336         adev->mode_info.rfbdev = rfbdev;
 337
 338         drm_fb_helper_prepare(adev->ddev, &rfbdev->helper,
 339                         &amdgpu_fb_helper_funcs);
 340
 341         ret = drm_fb_helper_init(adev->ddev, &rfbdev->helper,
 342                                  AMDGPUFB_CONN_LIMIT);
 343         if (ret) {
 344                 kfree(rfbdev);
 345                 return ret;
 346         }
 347
 348         drm_fb_helper_single_add_all_connectors(&rfbdev->helper);
 349
 350         /* disable all the possible outputs/crtcs before entering KMS mode */
 351         if (!amdgpu_device_has_dc_support(adev))
 352                 drm_helper_disable_unused_functions(adev->ddev);
 353
 354         drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
 355         return 0;
 356 }
 357
 358 void amdgpu_fbdev_fini(struct amdgpu_device *adev)
 359 {
 360         if (!adev->mode_info.rfbdev)
 361                 return;
 362
 363         amdgpu_fbdev_destroy(adev->ddev, adev->mode_info.rfbdev);
 364         kfree(adev->mode_info.rfbdev);
 365         adev->mode_info.rfbdev = NULL;
 366 }
 367
 368 void amdgpu_fbdev_set_suspend(struct amdgpu_device *adev, int state)
 369 {
 370         if (adev->mode_info.rfbdev)
 371                 drm_fb_helper_set_suspend(&adev->mode_info.rfbdev->helper,
 372                         state);
 373 }
 374
 375 int amdgpu_fbdev_total_size(struct amdgpu_device *adev)
 376 {
 377         struct amdgpu_bo *robj;
 378         int size = 0;
 379
 380         if (!adev->mode_info.rfbdev)
 381                 return 0;
 382
 383         robj = gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.obj);
 384         size += amdgpu_bo_size(robj);
 385         return size;
 386 }
 387
 388 bool amdgpu_fbdev_robj_is_fb(struct amdgpu_device *adev, struct amdgpu_bo *robj)
 389 {
 390         if (!adev->mode_info.rfbdev)
 391                 return false;
 392         if (robj == gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.obj))
 393                 return true;
 394         return false;
 395 }
 396
 397 void amdgpu_fbdev_restore_mode(struct amdgpu_device *adev)
 398 {
 399         struct amdgpu_fbdev *afbdev;
 400         struct drm_fb_helper *fb_helper;
 401         int ret;
 402
 403         if (!adev)
 404                 return;
 405
 406         afbdev = adev->mode_info.rfbdev;
 407
 408         if (!afbdev)
 409                 return;
 410
 411         fb_helper = &afbdev->helper;
 412
 413         ret = drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper);
 414         if (ret)
 415                 DRM_DEBUG("failed to restore crtc mode\n");
 416 }