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 #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/radeon_drm.h>
  34 #include "radeon.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 radeon fb
  42    the helper contains a pointer to radeon framebuffer baseclass.
  43 */
  44 struct radeon_fbdev {
  45         struct drm_fb_helper helper;
  46         struct radeon_framebuffer rfb;
  47         struct list_head fbdev_list;
  48         struct radeon_device *rdev;
  49 };
  50
  51 static struct fb_ops radeonfb_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 = drm_fb_helper_cfb_fillrect,
  56         .fb_copyarea = drm_fb_helper_cfb_copyarea,
  57         .fb_imageblit = drm_fb_helper_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 radeon_align_pitch(struct radeon_device *rdev, int width, int bpp, bool tiled)
  67 {
  68         int aligned = width;
  69         int align_large = (ASIC_IS_AVIVO(rdev)) || tiled;
  70         int pitch_mask = 0;
  71
  72         switch (bpp / 8) {
  73         case 1:
  74                 pitch_mask = align_large ? 255 : 127;
  75                 break;
  76         case 2:
  77                 pitch_mask = align_large ? 127 : 31;
  78                 break;
  79         case 3:
  80         case 4:
  81                 pitch_mask = align_large ? 63 : 15;
  82                 break;
  83         }
  84
  85         aligned += pitch_mask;
  86         aligned &= ~pitch_mask;
  87         return aligned;
  88 }
  89
  90 static void radeonfb_destroy_pinned_object(struct drm_gem_object *gobj)
  91 {
  92         struct radeon_bo *rbo = gem_to_radeon_bo(gobj);
  93         int ret;
  94
  95         ret = radeon_bo_reserve(rbo, false);
  96         if (likely(ret == 0)) {
  97                 radeon_bo_kunmap(rbo);
  98                 radeon_bo_unpin(rbo);
  99                 radeon_bo_unreserve(rbo);
 100         }
 101         drm_gem_object_unreference_unlocked(gobj);
 102 }
 103
 104 static int radeonfb_create_pinned_object(struct radeon_fbdev *rfbdev,
 105                                          struct drm_mode_fb_cmd2 *mode_cmd,
 106                                          struct drm_gem_object **gobj_p)
 107 {
 108         struct radeon_device *rdev = rfbdev->rdev;
 109         struct drm_gem_object *gobj = NULL;
 110         struct radeon_bo *rbo = NULL;
 111         bool fb_tiled = false; /* useful for testing */
 112         u32 tiling_flags = 0;
 113         int ret;
 114         int aligned_size, size;
 115         int height = mode_cmd->height;
 116         u32 bpp, depth;
 117
 118         drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
 119
 120         /* need to align pitch with crtc limits */
 121         mode_cmd->pitches[0] = radeon_align_pitch(rdev, mode_cmd->width, bpp,
 122                                                   fb_tiled) * ((bpp + 1) / 8);
 123
 124         if (rdev->family >= CHIP_R600)
 125                 height = ALIGN(mode_cmd->height, 8);
 126         size = mode_cmd->pitches[0] * height;
 127         aligned_size = ALIGN(size, PAGE_SIZE);
 128         ret = radeon_gem_object_create(rdev, aligned_size, 0,
 129                                        RADEON_GEM_DOMAIN_VRAM,
 130                                        0, true, &gobj);
 131         if (ret) {
 132                 printk(KERN_ERR "failed to allocate framebuffer (%d)\n",
 133                        aligned_size);
 134                 return -ENOMEM;
 135         }
 136         rbo = gem_to_radeon_bo(gobj);
 137
 138         if (fb_tiled)
 139                 tiling_flags = RADEON_TILING_MACRO;
 140
 141 #ifdef __BIG_ENDIAN
 142         switch (bpp) {
 143         case 32:
 144                 tiling_flags |= RADEON_TILING_SWAP_32BIT;
 145                 break;
 146         case 16:
 147                 tiling_flags |= RADEON_TILING_SWAP_16BIT;
 148         default:
 149                 break;
 150         }
 151 #endif
 152
 153         if (tiling_flags) {
 154                 ret = radeon_bo_set_tiling_flags(rbo,
 155                                                  tiling_flags | RADEON_TILING_SURFACE,
 156                                                  mode_cmd->pitches[0]);
 157                 if (ret)
 158                         dev_err(rdev->dev, "FB failed to set tiling flags\n");
 159         }
 160
 161
 162         ret = radeon_bo_reserve(rbo, false);
 163         if (unlikely(ret != 0))
 164                 goto out_unref;
 165         /* Only 27 bit offset for legacy CRTC */
 166         ret = radeon_bo_pin_restricted(rbo, RADEON_GEM_DOMAIN_VRAM,
 167                                        ASIC_IS_AVIVO(rdev) ? 0 : 1 << 27,
 168                                        NULL);
 169         if (ret) {
 170                 radeon_bo_unreserve(rbo);
 171                 goto out_unref;
 172         }
 173         if (fb_tiled)
 174                 radeon_bo_check_tiling(rbo, 0, 0);
 175         ret = radeon_bo_kmap(rbo, NULL);
 176         radeon_bo_unreserve(rbo);
 177         if (ret) {
 178                 goto out_unref;
 179         }
 180
 181         *gobj_p = gobj;
 182         return 0;
 183 out_unref:
 184         radeonfb_destroy_pinned_object(gobj);
 185         *gobj_p = NULL;
 186         return ret;
 187 }
 188
 189 static int radeonfb_create(struct drm_fb_helper *helper,
 190                            struct drm_fb_helper_surface_size *sizes)
 191 {
 192         struct radeon_fbdev *rfbdev =
 193                 container_of(helper, struct radeon_fbdev, helper);
 194         struct radeon_device *rdev = rfbdev->rdev;
 195         struct fb_info *info;
 196         struct drm_framebuffer *fb = NULL;
 197         struct drm_mode_fb_cmd2 mode_cmd;
 198         struct drm_gem_object *gobj = NULL;
 199         struct radeon_bo *rbo = NULL;
 200         int ret;
 201         unsigned long tmp;
 202
 203         mode_cmd.width = sizes->surface_width;
 204         mode_cmd.height = sizes->surface_height;
 205
 206         /* avivo can't scanout real 24bpp */
 207         if ((sizes->surface_bpp == 24) && ASIC_IS_AVIVO(rdev))
 208                 sizes->surface_bpp = 32;
 209
 210         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 211                                                           sizes->surface_depth);
 212
 213         ret = radeonfb_create_pinned_object(rfbdev, &mode_cmd, &gobj);
 214         if (ret) {
 215                 DRM_ERROR("failed to create fbcon object %d\n", ret);
 216                 return ret;
 217         }
 218
 219         rbo = gem_to_radeon_bo(gobj);
 220
 221         /* okay we have an object now allocate the framebuffer */
 222         info = drm_fb_helper_alloc_fbi(helper);
 223         if (IS_ERR(info)) {
 224                 ret = PTR_ERR(info);
 225                 goto out_unref;
 226         }
 227
 228         info->par = rfbdev;
 229         info->skip_vt_switch = true;
 230
 231         ret = radeon_framebuffer_init(rdev->ddev, &rfbdev->rfb, &mode_cmd, gobj);
 232         if (ret) {
 233                 DRM_ERROR("failed to initialize framebuffer %d\n", ret);
 234                 goto out_destroy_fbi;
 235         }
 236
 237         fb = &rfbdev->rfb.base;
 238
 239         /* setup helper */
 240         rfbdev->helper.fb = fb;
 241
 242         memset_io(rbo->kptr, 0x0, radeon_bo_size(rbo));
 243
 244         strcpy(info->fix.id, "radeondrmfb");
 245
 246         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 247
 248         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 249         info->fbops = &radeonfb_ops;
 250
 251         tmp = radeon_bo_gpu_offset(rbo) - rdev->mc.vram_start;
 252         info->fix.smem_start = rdev->mc.aper_base + tmp;
 253         info->fix.smem_len = radeon_bo_size(rbo);
 254         info->screen_base = rbo->kptr;
 255         info->screen_size = radeon_bo_size(rbo);
 256
 257         drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height);
 258
 259         /* setup aperture base/size for vesafb takeover */
 260         info->apertures->ranges[0].base = rdev->ddev->mode_config.fb_base;
 261         info->apertures->ranges[0].size = rdev->mc.aper_size;
 262
 263         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 264
 265         if (info->screen_base == NULL) {
 266                 ret = -ENOSPC;
 267                 goto out_destroy_fbi;
 268         }
 269
 270         DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);
 271         DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)rdev->mc.aper_base);
 272         DRM_INFO("size %lu\n", (unsigned long)radeon_bo_size(rbo));
 273         DRM_INFO("fb depth is %d\n", fb->depth);
 274         DRM_INFO("   pitch is %d\n", fb->pitches[0]);
 275
 276         vga_switcheroo_client_fb_set(rdev->ddev->pdev, info);
 277         return 0;
 278
 279 out_destroy_fbi:
 280         drm_fb_helper_release_fbi(helper);
 281 out_unref:
 282         if (rbo) {
 283
 284         }
 285         if (fb && ret) {
 286                 drm_gem_object_unreference(gobj);
 287                 drm_framebuffer_unregister_private(fb);
 288                 drm_framebuffer_cleanup(fb);
 289                 kfree(fb);
 290         }
 291         return ret;
 292 }
 293
 294 void radeon_fb_output_poll_changed(struct radeon_device *rdev)
 295 {
 296         drm_fb_helper_hotplug_event(&rdev->mode_info.rfbdev->helper);
 297 }
 298
 299 static int radeon_fbdev_destroy(struct drm_device *dev, struct radeon_fbdev *rfbdev)
 300 {
 301         struct radeon_framebuffer *rfb = &rfbdev->rfb;
 302
 303         drm_fb_helper_unregister_fbi(&rfbdev->helper);
 304         drm_fb_helper_release_fbi(&rfbdev->helper);
 305
 306         if (rfb->obj) {
 307                 radeonfb_destroy_pinned_object(rfb->obj);
 308                 rfb->obj = NULL;
 309         }
 310         drm_fb_helper_fini(&rfbdev->helper);
 311         drm_framebuffer_unregister_private(&rfb->base);
 312         drm_framebuffer_cleanup(&rfb->base);
 313
 314         return 0;
 315 }
 316
 317 static const struct drm_fb_helper_funcs radeon_fb_helper_funcs = {
 318         .gamma_set = radeon_crtc_fb_gamma_set,
 319         .gamma_get = radeon_crtc_fb_gamma_get,
 320         .fb_probe = radeonfb_create,
 321 };
 322
 323 int radeon_fbdev_init(struct radeon_device *rdev)
 324 {
 325         struct radeon_fbdev *rfbdev;
 326         int bpp_sel = 32;
 327         int ret;
 328
 329         /* select 8 bpp console on RN50 or 16MB cards */
 330         if (ASIC_IS_RN50(rdev) || rdev->mc.real_vram_size <= (32*1024*1024))
 331                 bpp_sel = 8;
 332
 333         rfbdev = kzalloc(sizeof(struct radeon_fbdev), GFP_KERNEL);
 334         if (!rfbdev)
 335                 return -ENOMEM;
 336
 337         rfbdev->rdev = rdev;
 338         rdev->mode_info.rfbdev = rfbdev;
 339
 340         drm_fb_helper_prepare(rdev->ddev, &rfbdev->helper,
 341                               &radeon_fb_helper_funcs);
 342
 343         ret = drm_fb_helper_init(rdev->ddev, &rfbdev->helper,
 344                                  rdev->num_crtc,
 345                                  RADEONFB_CONN_LIMIT);
 346         if (ret)
 347                 goto free;
 348
 349         ret = drm_fb_helper_single_add_all_connectors(&rfbdev->helper);
 350         if (ret)
 351                 goto fini;
 352
 353         /* disable all the possible outputs/crtcs before entering KMS mode */
 354         drm_helper_disable_unused_functions(rdev->ddev);
 355
 356         ret = drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
 357         if (ret)
 358                 goto fini;
 359
 360         return 0;
 361
 362 fini:
 363         drm_fb_helper_fini(&rfbdev->helper);
 364 free:
 365         kfree(rfbdev);
 366         return ret;
 367 }
 368
 369 void radeon_fbdev_fini(struct radeon_device *rdev)
 370 {
 371         if (!rdev->mode_info.rfbdev)
 372                 return;
 373
 374         radeon_fbdev_destroy(rdev->ddev, rdev->mode_info.rfbdev);
 375         kfree(rdev->mode_info.rfbdev);
 376         rdev->mode_info.rfbdev = NULL;
 377 }
 378
 379 void radeon_fbdev_set_suspend(struct radeon_device *rdev, int state)
 380 {
 381         fb_set_suspend(rdev->mode_info.rfbdev->helper.fbdev, state);
 382 }
 383
 384 bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj)
 385 {
 386         if (robj == gem_to_radeon_bo(rdev->mode_info.rfbdev->rfb.obj))
 387                 return true;
 388         return false;
 389 }
 390
 391 void radeon_fb_add_connector(struct radeon_device *rdev, struct drm_connector *connector)
 392 {
 393         drm_fb_helper_add_one_connector(&rdev->mode_info.rfbdev->helper, connector);
 394 }
 395
 396 void radeon_fb_remove_connector(struct radeon_device *rdev, struct drm_connector *connector)
 397 {
 398         drm_fb_helper_remove_one_connector(&rdev->mode_info.rfbdev->helper, connector);
 399 }
 400
 401 void radeon_fbdev_restore_mode(struct radeon_device *rdev)
 402 {
 403         struct radeon_fbdev *rfbdev = rdev->mode_info.rfbdev;
 404         struct drm_fb_helper *fb_helper;
 405         int ret;
 406
 407         if (!rfbdev)
 408                 return;
 409
 410         fb_helper = &rfbdev->helper;
 411
 412         ret = drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper);
 413         if (ret)
 414                 DRM_DEBUG("failed to restore crtc mode\n");
 415 }