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/fb.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
  36 #include <drm/drm_fb_helper.h>
  37
  38 #include <linux/vga_switcheroo.h>
  39
  40 /* object hierarchy -
  41    this contains a helper + a amdgpu fb
  42    the helper contains a pointer to amdgpu framebuffer baseclass.
  43 */
  44 struct amdgpu_fbdev {
  45         struct drm_fb_helper helper;
  46         struct amdgpu_framebuffer rfb;
  47         struct list_head fbdev_list;
  48         struct amdgpu_device *adev;
  49 };
  50
  51 static struct fb_ops amdgpufb_ops = {
  52         .owner = THIS_MODULE,
  53         .fb_check_var = drm_fb_helper_check_var,
  54         .fb_set_par = drm_fb_helper_set_par,
  55         .fb_fillrect = cfb_fillrect,
  56         .fb_copyarea = cfb_copyarea,
  57         .fb_imageblit = cfb_imageblit,
  58         .fb_pan_display = drm_fb_helper_pan_display,
  59         .fb_blank = drm_fb_helper_blank,
  60         .fb_setcmap = drm_fb_helper_setcmap,
  61         .fb_debug_enter = drm_fb_helper_debug_enter,
  62         .fb_debug_leave = drm_fb_helper_debug_leave,
  63 };
  64
  65
  66 int amdgpu_align_pitch(struct amdgpu_device *adev, int width, int bpp, bool tiled)
  67 {
  68         int aligned = width;
  69         int pitch_mask = 0;
  70
  71         switch (bpp / 8) {
  72         case 1:
  73                 pitch_mask = 255;
  74                 break;
  75         case 2:
  76                 pitch_mask = 127;
  77                 break;
  78         case 3:
  79         case 4:
  80                 pitch_mask = 63;
  81                 break;
  82         }
  83
  84         aligned += pitch_mask;
  85         aligned &= ~pitch_mask;
  86         return aligned;
  87 }
  88
  89 static void amdgpufb_destroy_pinned_object(struct drm_gem_object *gobj)
  90 {
  91         struct amdgpu_bo *rbo = gem_to_amdgpu_bo(gobj);
  92         int ret;
  93
  94         ret = amdgpu_bo_reserve(rbo, false);
  95         if (likely(ret == 0)) {
  96                 amdgpu_bo_kunmap(rbo);
  97                 amdgpu_bo_unpin(rbo);
  98                 amdgpu_bo_unreserve(rbo);
  99         }
 100         drm_gem_object_unreference_unlocked(gobj);
 101 }
 102
 103 static int amdgpufb_create_pinned_object(struct amdgpu_fbdev *rfbdev,
 104                                          struct drm_mode_fb_cmd2 *mode_cmd,
 105                                          struct drm_gem_object **gobj_p)
 106 {
 107         struct amdgpu_device *adev = rfbdev->adev;
 108         struct drm_gem_object *gobj = NULL;
 109         struct amdgpu_bo *rbo = NULL;
 110         bool fb_tiled = false; /* useful for testing */
 111         u32 tiling_flags = 0;
 112         int ret;
 113         int aligned_size, size;
 114         int height = mode_cmd->height;
 115         u32 bpp, depth;
 116
 117         drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
 118
 119         /* need to align pitch with crtc limits */
 120         mode_cmd->pitches[0] = amdgpu_align_pitch(adev, mode_cmd->width, bpp,
 121                                                   fb_tiled) * ((bpp + 1) / 8);
 122
 123         height = ALIGN(mode_cmd->height, 8);
 124         size = mode_cmd->pitches[0] * height;
 125         aligned_size = ALIGN(size, PAGE_SIZE);
 126         ret = amdgpu_gem_object_create(adev, aligned_size, 0,
 127                                        AMDGPU_GEM_DOMAIN_VRAM,
 128                                        0, true,
 129                                        &gobj);
 130         if (ret) {
 131                 printk(KERN_ERR "failed to allocate framebuffer (%d)\n",
 132                        aligned_size);
 133                 return -ENOMEM;
 134         }
 135         rbo = gem_to_amdgpu_bo(gobj);
 136
 137         if (fb_tiled)
 138                 tiling_flags = AMDGPU_TILING_MACRO;
 139
 140 #ifdef __BIG_ENDIAN
 141         switch (bpp) {
 142         case 32:
 143                 tiling_flags |= AMDGPU_TILING_SWAP_32BIT;
 144                 break;
 145         case 16:
 146                 tiling_flags |= AMDGPU_TILING_SWAP_16BIT;
 147         default:
 148                 break;
 149         }
 150 #endif
 151
 152         ret = amdgpu_bo_reserve(rbo, false);
 153         if (unlikely(ret != 0))
 154                 goto out_unref;
 155
 156         if (tiling_flags) {
 157                 ret = amdgpu_bo_set_tiling_flags(rbo,
 158                                                  tiling_flags | AMDGPU_TILING_SURFACE);
 159                 if (ret)
 160                         dev_err(adev->dev, "FB failed to set tiling flags\n");
 161         }
 162
 163
 164         ret = amdgpu_bo_pin_restricted(rbo, AMDGPU_GEM_DOMAIN_VRAM, 0, NULL);
 165         if (ret) {
 166                 amdgpu_bo_unreserve(rbo);
 167                 goto out_unref;
 168         }
 169         ret = amdgpu_bo_kmap(rbo, NULL);
 170         amdgpu_bo_unreserve(rbo);
 171         if (ret) {
 172                 goto out_unref;
 173         }
 174
 175         *gobj_p = gobj;
 176         return 0;
 177 out_unref:
 178         amdgpufb_destroy_pinned_object(gobj);
 179         *gobj_p = NULL;
 180         return ret;
 181 }
 182
 183 static int amdgpufb_create(struct drm_fb_helper *helper,
 184                            struct drm_fb_helper_surface_size *sizes)
 185 {
 186         struct amdgpu_fbdev *rfbdev = (struct amdgpu_fbdev *)helper;
 187         struct amdgpu_device *adev = rfbdev->adev;
 188         struct fb_info *info;
 189         struct drm_framebuffer *fb = NULL;
 190         struct drm_mode_fb_cmd2 mode_cmd;
 191         struct drm_gem_object *gobj = NULL;
 192         struct amdgpu_bo *rbo = NULL;
 193         struct device *device = &adev->pdev->dev;
 194         int ret;
 195         unsigned long tmp;
 196
 197         mode_cmd.width = sizes->surface_width;
 198         mode_cmd.height = sizes->surface_height;
 199
 200         if (sizes->surface_bpp == 24)
 201                 sizes->surface_bpp = 32;
 202
 203         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 204                                                           sizes->surface_depth);
 205
 206         ret = amdgpufb_create_pinned_object(rfbdev, &mode_cmd, &gobj);
 207         if (ret) {
 208                 DRM_ERROR("failed to create fbcon object %d\n", ret);
 209                 return ret;
 210         }
 211
 212         rbo = gem_to_amdgpu_bo(gobj);
 213
 214         /* okay we have an object now allocate the framebuffer */
 215         info = framebuffer_alloc(0, device);
 216         if (info == NULL) {
 217                 ret = -ENOMEM;
 218                 goto out_unref;
 219         }
 220
 221         info->par = rfbdev;
 222
 223         ret = amdgpu_framebuffer_init(adev->ddev, &rfbdev->rfb, &mode_cmd, gobj);
 224         if (ret) {
 225                 DRM_ERROR("failed to initialize framebuffer %d\n", ret);
 226                 goto out_unref;
 227         }
 228
 229         fb = &rfbdev->rfb.base;
 230
 231         /* setup helper */
 232         rfbdev->helper.fb = fb;
 233         rfbdev->helper.fbdev = info;
 234
 235         memset_io(rbo->kptr, 0x0, amdgpu_bo_size(rbo));
 236
 237         strcpy(info->fix.id, "amdgpudrmfb");
 238
 239         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 240
 241         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 242         info->fbops = &amdgpufb_ops;
 243
 244         tmp = amdgpu_bo_gpu_offset(rbo) - adev->mc.vram_start;
 245         info->fix.smem_start = adev->mc.aper_base + tmp;
 246         info->fix.smem_len = amdgpu_bo_size(rbo);
 247         info->screen_base = rbo->kptr;
 248         info->screen_size = amdgpu_bo_size(rbo);
 249
 250         drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height);
 251
 252         /* setup aperture base/size for vesafb takeover */
 253         info->apertures = alloc_apertures(1);
 254         if (!info->apertures) {
 255                 ret = -ENOMEM;
 256                 goto out_unref;
 257         }
 258         info->apertures->ranges[0].base = adev->ddev->mode_config.fb_base;
 259         info->apertures->ranges[0].size = adev->mc.aper_size;
 260
 261         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 262
 263         if (info->screen_base == NULL) {
 264                 ret = -ENOSPC;
 265                 goto out_unref;
 266         }
 267
 268         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 269         if (ret) {
 270                 ret = -ENOMEM;
 271                 goto out_unref;
 272         }
 273
 274         DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);
 275         DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)adev->mc.aper_base);
 276         DRM_INFO("size %lu\n", (unsigned long)amdgpu_bo_size(rbo));
 277         DRM_INFO("fb depth is %d\n", fb->depth);
 278         DRM_INFO("   pitch is %d\n", fb->pitches[0]);
 279
 280         vga_switcheroo_client_fb_set(adev->ddev->pdev, info);
 281         return 0;
 282
 283 out_unref:
 284         if (rbo) {
 285
 286         }
 287         if (fb && ret) {
 288                 drm_gem_object_unreference(gobj);
 289                 drm_framebuffer_unregister_private(fb);
 290                 drm_framebuffer_cleanup(fb);
 291                 kfree(fb);
 292         }
 293         return ret;
 294 }
 295
 296 void amdgpu_fb_output_poll_changed(struct amdgpu_device *adev)
 297 {
 298         if (adev->mode_info.rfbdev)
 299                 drm_fb_helper_hotplug_event(&adev->mode_info.rfbdev->helper);
 300 }
 301
 302 static int amdgpu_fbdev_destroy(struct drm_device *dev, struct amdgpu_fbdev *rfbdev)
 303 {
 304         struct fb_info *info;
 305         struct amdgpu_framebuffer *rfb = &rfbdev->rfb;
 306
 307         if (rfbdev->helper.fbdev) {
 308                 info = rfbdev->helper.fbdev;
 309
 310                 unregister_framebuffer(info);
 311                 if (info->cmap.len)
 312                         fb_dealloc_cmap(&info->cmap);
 313                 framebuffer_release(info);
 314         }
 315
 316         if (rfb->obj) {
 317                 amdgpufb_destroy_pinned_object(rfb->obj);
 318                 rfb->obj = NULL;
 319         }
 320         drm_fb_helper_fini(&rfbdev->helper);
 321         drm_framebuffer_unregister_private(&rfb->base);
 322         drm_framebuffer_cleanup(&rfb->base);
 323
 324         return 0;
 325 }
 326
 327 /** Sets the color ramps on behalf of fbcon */
 328 static void amdgpu_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 329                                       u16 blue, int regno)
 330 {
 331         struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
 332
 333         amdgpu_crtc->lut_r[regno] = red >> 6;
 334         amdgpu_crtc->lut_g[regno] = green >> 6;
 335         amdgpu_crtc->lut_b[regno] = blue >> 6;
 336 }
 337
 338 /** Gets the color ramps on behalf of fbcon */
 339 static void amdgpu_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
 340                                       u16 *blue, int regno)
 341 {
 342         struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
 343
 344         *red = amdgpu_crtc->lut_r[regno] << 6;
 345         *green = amdgpu_crtc->lut_g[regno] << 6;
 346         *blue = amdgpu_crtc->lut_b[regno] << 6;
 347 }
 348
 349 static const struct drm_fb_helper_funcs amdgpu_fb_helper_funcs = {
 350         .gamma_set = amdgpu_crtc_fb_gamma_set,
 351         .gamma_get = amdgpu_crtc_fb_gamma_get,
 352         .fb_probe = amdgpufb_create,
 353 };
 354
 355 int amdgpu_fbdev_init(struct amdgpu_device *adev)
 356 {
 357         struct amdgpu_fbdev *rfbdev;
 358         int bpp_sel = 32;
 359         int ret;
 360
 361         /* don't init fbdev on hw without DCE */
 362         if (!adev->mode_info.mode_config_initialized)
 363                 return 0;
 364
 365         /* select 8 bpp console on low vram cards */
 366         if (adev->mc.real_vram_size <= (32*1024*1024))
 367                 bpp_sel = 8;
 368
 369         rfbdev = kzalloc(sizeof(struct amdgpu_fbdev), GFP_KERNEL);
 370         if (!rfbdev)
 371                 return -ENOMEM;
 372
 373         rfbdev->adev = adev;
 374         adev->mode_info.rfbdev = rfbdev;
 375
 376         drm_fb_helper_prepare(adev->ddev, &rfbdev->helper,
 377                         &amdgpu_fb_helper_funcs);
 378
 379         ret = drm_fb_helper_init(adev->ddev, &rfbdev->helper,
 380                                  adev->mode_info.num_crtc,
 381                                  AMDGPUFB_CONN_LIMIT);
 382         if (ret) {
 383                 kfree(rfbdev);
 384                 return ret;
 385         }
 386
 387         drm_fb_helper_single_add_all_connectors(&rfbdev->helper);
 388
 389         /* disable all the possible outputs/crtcs before entering KMS mode */
 390         drm_helper_disable_unused_functions(adev->ddev);
 391
 392         drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
 393         return 0;
 394 }
 395
 396 void amdgpu_fbdev_fini(struct amdgpu_device *adev)
 397 {
 398         if (!adev->mode_info.rfbdev)
 399                 return;
 400
 401         amdgpu_fbdev_destroy(adev->ddev, adev->mode_info.rfbdev);
 402         kfree(adev->mode_info.rfbdev);
 403         adev->mode_info.rfbdev = NULL;
 404 }
 405
 406 void amdgpu_fbdev_set_suspend(struct amdgpu_device *adev, int state)
 407 {
 408         if (adev->mode_info.rfbdev)
 409                 fb_set_suspend(adev->mode_info.rfbdev->helper.fbdev, state);
 410 }
 411
 412 int amdgpu_fbdev_total_size(struct amdgpu_device *adev)
 413 {
 414         struct amdgpu_bo *robj;
 415         int size = 0;
 416
 417         if (!adev->mode_info.rfbdev)
 418                 return 0;
 419
 420         robj = gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.obj);
 421         size += amdgpu_bo_size(robj);
 422         return size;
 423 }
 424
 425 bool amdgpu_fbdev_robj_is_fb(struct amdgpu_device *adev, struct amdgpu_bo *robj)
 426 {
 427         if (!adev->mode_info.rfbdev)
 428                 return false;
 429         if (robj == gem_to_amdgpu_bo(adev->mode_info.rfbdev->rfb.obj))
 430                 return true;
 431         return false;
 432 }