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/drm_framebuffer.h>
  38 #include <drm/radeon_drm.h>
  39
  40 #include "radeon.h"
  41
  42 /* object hierarchy -
  43  * this contains a helper + a radeon fb
  44  * the helper contains a pointer to radeon framebuffer baseclass.
  45  */
  46 struct radeon_fbdev {
  47         struct drm_fb_helper helper; /* must be first */
  48         struct drm_framebuffer fb;
  49         struct radeon_device *rdev;
  50 };
  51
  52 static int
  53 radeonfb_open(struct fb_info *info, int user)
  54 {
  55         struct radeon_fbdev *rfbdev = info->par;
  56         struct radeon_device *rdev = rfbdev->rdev;
  57         int ret = pm_runtime_get_sync(rdev->ddev->dev);
  58
  59         if (ret < 0 && ret != -EACCES) {
  60                 pm_runtime_mark_last_busy(rdev->ddev->dev);
  61                 pm_runtime_put_autosuspend(rdev->ddev->dev);
  62                 return ret;
  63         }
  64         return 0;
  65 }
  66
  67 static int
  68 radeonfb_release(struct fb_info *info, int user)
  69 {
  70         struct radeon_fbdev *rfbdev = info->par;
  71         struct radeon_device *rdev = rfbdev->rdev;
  72
  73         pm_runtime_mark_last_busy(rdev->ddev->dev);
  74         pm_runtime_put_autosuspend(rdev->ddev->dev);
  75         return 0;
  76 }
  77
  78 static const struct fb_ops radeonfb_ops = {
  79         .owner = THIS_MODULE,
  80         DRM_FB_HELPER_DEFAULT_OPS,
  81         .fb_open = radeonfb_open,
  82         .fb_release = radeonfb_release,
  83         .fb_fillrect = drm_fb_helper_cfb_fillrect,
  84         .fb_copyarea = drm_fb_helper_cfb_copyarea,
  85         .fb_imageblit = drm_fb_helper_cfb_imageblit,
  86 };
  87
  88
  89 int radeon_align_pitch(struct radeon_device *rdev, int width, int cpp, bool tiled)
  90 {
  91         int aligned = width;
  92         int align_large = (ASIC_IS_AVIVO(rdev)) || tiled;
  93         int pitch_mask = 0;
  94
  95         switch (cpp) {
  96         case 1:
  97                 pitch_mask = align_large ? 255 : 127;
  98                 break;
  99         case 2:
 100                 pitch_mask = align_large ? 127 : 31;
 101                 break;
 102         case 3:
 103         case 4:
 104                 pitch_mask = align_large ? 63 : 15;
 105                 break;
 106         }
 107
 108         aligned += pitch_mask;
 109         aligned &= ~pitch_mask;
 110         return aligned * cpp;
 111 }
 112
 113 static void radeonfb_destroy_pinned_object(struct drm_gem_object *gobj)
 114 {
 115         struct radeon_bo *rbo = gem_to_radeon_bo(gobj);
 116         int ret;
 117
 118         ret = radeon_bo_reserve(rbo, false);
 119         if (likely(ret == 0)) {
 120                 radeon_bo_kunmap(rbo);
 121                 radeon_bo_unpin(rbo);
 122                 radeon_bo_unreserve(rbo);
 123         }
 124         drm_gem_object_put(gobj);
 125 }
 126
 127 static int radeonfb_create_pinned_object(struct radeon_fbdev *rfbdev,
 128                                          struct drm_mode_fb_cmd2 *mode_cmd,
 129                                          struct drm_gem_object **gobj_p)
 130 {
 131         const struct drm_format_info *info;
 132         struct radeon_device *rdev = rfbdev->rdev;
 133         struct drm_gem_object *gobj = NULL;
 134         struct radeon_bo *rbo = NULL;
 135         bool fb_tiled = false; /* useful for testing */
 136         u32 tiling_flags = 0;
 137         int ret;
 138         int aligned_size, size;
 139         int height = mode_cmd->height;
 140         u32 cpp;
 141
 142         info = drm_get_format_info(rdev->ddev, mode_cmd);
 143         cpp = info->cpp[0];
 144
 145         /* need to align pitch with crtc limits */
 146         mode_cmd->pitches[0] = radeon_align_pitch(rdev, mode_cmd->width, cpp,
 147                                                   fb_tiled);
 148
 149         if (rdev->family >= CHIP_R600)
 150                 height = ALIGN(mode_cmd->height, 8);
 151         size = mode_cmd->pitches[0] * height;
 152         aligned_size = ALIGN(size, PAGE_SIZE);
 153         ret = radeon_gem_object_create(rdev, aligned_size, 0,
 154                                        RADEON_GEM_DOMAIN_VRAM,
 155                                        0, true, &gobj);
 156         if (ret) {
 157                 pr_err("failed to allocate framebuffer (%d)\n", aligned_size);
 158                 return -ENOMEM;
 159         }
 160         rbo = gem_to_radeon_bo(gobj);
 161
 162         if (fb_tiled)
 163                 tiling_flags = RADEON_TILING_MACRO;
 164
 165 #ifdef __BIG_ENDIAN
 166         switch (cpp) {
 167         case 4:
 168                 tiling_flags |= RADEON_TILING_SWAP_32BIT;
 169                 break;
 170         case 2:
 171                 tiling_flags |= RADEON_TILING_SWAP_16BIT;
 172                 break;
 173         default:
 174                 break;
 175         }
 176 #endif
 177
 178         if (tiling_flags) {
 179                 ret = radeon_bo_set_tiling_flags(rbo,
 180                                                  tiling_flags | RADEON_TILING_SURFACE,
 181                                                  mode_cmd->pitches[0]);
 182                 if (ret)
 183                         dev_err(rdev->dev, "FB failed to set tiling flags\n");
 184         }
 185
 186
 187         ret = radeon_bo_reserve(rbo, false);
 188         if (unlikely(ret != 0))
 189                 goto out_unref;
 190         /* Only 27 bit offset for legacy CRTC */
 191         ret = radeon_bo_pin_restricted(rbo, RADEON_GEM_DOMAIN_VRAM,
 192                                        ASIC_IS_AVIVO(rdev) ? 0 : 1 << 27,
 193                                        NULL);
 194         if (ret) {
 195                 radeon_bo_unreserve(rbo);
 196                 goto out_unref;
 197         }
 198         if (fb_tiled)
 199                 radeon_bo_check_tiling(rbo, 0, 0);
 200         ret = radeon_bo_kmap(rbo, NULL);
 201         radeon_bo_unreserve(rbo);
 202         if (ret)
 203                 goto out_unref;
 204
 205         *gobj_p = gobj;
 206         return 0;
 207 out_unref:
 208         radeonfb_destroy_pinned_object(gobj);
 209         *gobj_p = NULL;
 210         return ret;
 211 }
 212
 213 static int radeonfb_create(struct drm_fb_helper *helper,
 214                            struct drm_fb_helper_surface_size *sizes)
 215 {
 216         struct radeon_fbdev *rfbdev =
 217                 container_of(helper, struct radeon_fbdev, helper);
 218         struct radeon_device *rdev = rfbdev->rdev;
 219         struct fb_info *info;
 220         struct drm_framebuffer *fb = NULL;
 221         struct drm_mode_fb_cmd2 mode_cmd;
 222         struct drm_gem_object *gobj = NULL;
 223         struct radeon_bo *rbo = NULL;
 224         int ret;
 225         unsigned long tmp;
 226
 227         mode_cmd.width = sizes->surface_width;
 228         mode_cmd.height = sizes->surface_height;
 229
 230         /* avivo can't scanout real 24bpp */
 231         if ((sizes->surface_bpp == 24) && ASIC_IS_AVIVO(rdev))
 232                 sizes->surface_bpp = 32;
 233
 234         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 235                                                           sizes->surface_depth);
 236
 237         ret = radeonfb_create_pinned_object(rfbdev, &mode_cmd, &gobj);
 238         if (ret) {
 239                 DRM_ERROR("failed to create fbcon object %d\n", ret);
 240                 return ret;
 241         }
 242
 243         rbo = gem_to_radeon_bo(gobj);
 244
 245         /* okay we have an object now allocate the framebuffer */
 246         info = drm_fb_helper_alloc_fbi(helper);
 247         if (IS_ERR(info)) {
 248                 ret = PTR_ERR(info);
 249                 goto out;
 250         }
 251
 252         /* radeon resume is fragile and needs a vt switch to help it along */
 253         info->skip_vt_switch = false;
 254
 255         ret = radeon_framebuffer_init(rdev->ddev, &rfbdev->fb, &mode_cmd, gobj);
 256         if (ret) {
 257                 DRM_ERROR("failed to initialize framebuffer %d\n", ret);
 258                 goto out;
 259         }
 260
 261         fb = &rfbdev->fb;
 262
 263         /* setup helper */
 264         rfbdev->helper.fb = fb;
 265
 266         memset_io(rbo->kptr, 0x0, radeon_bo_size(rbo));
 267
 268         info->fbops = &radeonfb_ops;
 269
 270         tmp = radeon_bo_gpu_offset(rbo) - rdev->mc.vram_start;
 271         info->fix.smem_start = rdev->mc.aper_base + tmp;
 272         info->fix.smem_len = radeon_bo_size(rbo);
 273         info->screen_base = rbo->kptr;
 274         info->screen_size = radeon_bo_size(rbo);
 275
 276         drm_fb_helper_fill_info(info, &rfbdev->helper, sizes);
 277
 278         /* setup aperture base/size for vesafb takeover */
 279         info->apertures->ranges[0].base = rdev->ddev->mode_config.fb_base;
 280         info->apertures->ranges[0].size = rdev->mc.aper_size;
 281
 282         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 283
 284         if (info->screen_base == NULL) {
 285                 ret = -ENOSPC;
 286                 goto out;
 287         }
 288
 289         DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);
 290         DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)rdev->mc.aper_base);
 291         DRM_INFO("size %lu\n", (unsigned long)radeon_bo_size(rbo));
 292         DRM_INFO("fb depth is %d\n", fb->format->depth);
 293         DRM_INFO("   pitch is %d\n", fb->pitches[0]);
 294
 295         vga_switcheroo_client_fb_set(rdev->pdev, info);
 296         return 0;
 297
 298 out:
 299         if (fb && ret) {
 300                 drm_gem_object_put(gobj);
 301                 drm_framebuffer_unregister_private(fb);
 302                 drm_framebuffer_cleanup(fb);
 303                 kfree(fb);
 304         }
 305         return ret;
 306 }
 307
 308 static int radeon_fbdev_destroy(struct drm_device *dev, struct radeon_fbdev *rfbdev)
 309 {
 310         struct drm_framebuffer *fb = &rfbdev->fb;
 311
 312         drm_fb_helper_unregister_fbi(&rfbdev->helper);
 313
 314         if (fb->obj[0]) {
 315                 radeonfb_destroy_pinned_object(fb->obj[0]);
 316                 fb->obj[0] = NULL;
 317                 drm_framebuffer_unregister_private(fb);
 318                 drm_framebuffer_cleanup(fb);
 319         }
 320         drm_fb_helper_fini(&rfbdev->helper);
 321
 322         return 0;
 323 }
 324
 325 static const struct drm_fb_helper_funcs radeon_fb_helper_funcs = {
 326         .fb_probe = radeonfb_create,
 327 };
 328
 329 int radeon_fbdev_init(struct radeon_device *rdev)
 330 {
 331         struct radeon_fbdev *rfbdev;
 332         int bpp_sel = 32;
 333         int ret;
 334
 335         /* don't enable fbdev if no connectors */
 336         if (list_empty(&rdev->ddev->mode_config.connector_list))
 337                 return 0;
 338
 339         /* select 8 bpp console on 8MB cards, or 16 bpp on RN50 or 32MB */
 340         if (rdev->mc.real_vram_size <= (8*1024*1024))
 341                 bpp_sel = 8;
 342         else if (ASIC_IS_RN50(rdev) ||
 343                  rdev->mc.real_vram_size <= (32*1024*1024))
 344                 bpp_sel = 16;
 345
 346         rfbdev = kzalloc(sizeof(struct radeon_fbdev), GFP_KERNEL);
 347         if (!rfbdev)
 348                 return -ENOMEM;
 349
 350         rfbdev->rdev = rdev;
 351         rdev->mode_info.rfbdev = rfbdev;
 352
 353         drm_fb_helper_prepare(rdev->ddev, &rfbdev->helper,
 354                               &radeon_fb_helper_funcs);
 355
 356         ret = drm_fb_helper_init(rdev->ddev, &rfbdev->helper);
 357         if (ret)
 358                 goto free;
 359
 360         /* disable all the possible outputs/crtcs before entering KMS mode */
 361         drm_helper_disable_unused_functions(rdev->ddev);
 362
 363         ret = drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
 364         if (ret)
 365                 goto fini;
 366
 367         return 0;
 368
 369 fini:
 370         drm_fb_helper_fini(&rfbdev->helper);
 371 free:
 372         kfree(rfbdev);
 373         return ret;
 374 }
 375
 376 void radeon_fbdev_fini(struct radeon_device *rdev)
 377 {
 378         if (!rdev->mode_info.rfbdev)
 379                 return;
 380
 381         radeon_fbdev_destroy(rdev->ddev, rdev->mode_info.rfbdev);
 382         kfree(rdev->mode_info.rfbdev);
 383         rdev->mode_info.rfbdev = NULL;
 384 }
 385
 386 void radeon_fbdev_set_suspend(struct radeon_device *rdev, int state)
 387 {
 388         if (rdev->mode_info.rfbdev)
 389                 drm_fb_helper_set_suspend(&rdev->mode_info.rfbdev->helper, state);
 390 }
 391
 392 bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj)
 393 {
 394         if (!rdev->mode_info.rfbdev)
 395                 return false;
 396
 397         if (robj == gem_to_radeon_bo(rdev->mode_info.rfbdev->fb.obj[0]))
 398                 return true;
 399         return false;
 400 }