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 /**
  52  * radeon_fb_helper_set_par - Hide cursor on CRTCs used by fbdev.
  53  *
  54  * @info: fbdev info
  55  *
  56  * This function hides the cursor on all CRTCs used by fbdev.
  57  */
  58 static int radeon_fb_helper_set_par(struct fb_info *info)
  59 {
  60         int ret;
  61
  62         ret = drm_fb_helper_set_par(info);
  63
  64         /* XXX: with universal plane support fbdev will automatically disable
  65          * all non-primary planes (including the cursor)
  66          */
  67         if (ret == 0) {
  68                 struct drm_fb_helper *fb_helper = info->par;
  69                 int i;
  70
  71                 for (i = 0; i < fb_helper->crtc_count; i++) {
  72                         struct drm_crtc *crtc = fb_helper->crtc_info[i].mode_set.crtc;
  73
  74                         radeon_crtc_cursor_set2(crtc, NULL, 0, 0, 0, 0, 0);
  75                 }
  76         }
  77
  78         return ret;
  79 }
  80
  81 static struct fb_ops radeonfb_ops = {
  82         .owner = THIS_MODULE,
  83         .fb_check_var = drm_fb_helper_check_var,
  84         .fb_set_par = radeon_fb_helper_set_par,
  85         .fb_fillrect = drm_fb_helper_cfb_fillrect,
  86         .fb_copyarea = drm_fb_helper_cfb_copyarea,
  87         .fb_imageblit = drm_fb_helper_cfb_imageblit,
  88         .fb_pan_display = drm_fb_helper_pan_display,
  89         .fb_blank = drm_fb_helper_blank,
  90         .fb_setcmap = drm_fb_helper_setcmap,
  91         .fb_debug_enter = drm_fb_helper_debug_enter,
  92         .fb_debug_leave = drm_fb_helper_debug_leave,
  93 };
  94
  95
  96 int radeon_align_pitch(struct radeon_device *rdev, int width, int bpp, bool tiled)
  97 {
  98         int aligned = width;
  99         int align_large = (ASIC_IS_AVIVO(rdev)) || tiled;
 100         int pitch_mask = 0;
 101
 102         switch (bpp / 8) {
 103         case 1:
 104                 pitch_mask = align_large ? 255 : 127;
 105                 break;
 106         case 2:
 107                 pitch_mask = align_large ? 127 : 31;
 108                 break;
 109         case 3:
 110         case 4:
 111                 pitch_mask = align_large ? 63 : 15;
 112                 break;
 113         }
 114
 115         aligned += pitch_mask;
 116         aligned &= ~pitch_mask;
 117         return aligned;
 118 }
 119
 120 static void radeonfb_destroy_pinned_object(struct drm_gem_object *gobj)
 121 {
 122         struct radeon_bo *rbo = gem_to_radeon_bo(gobj);
 123         int ret;
 124
 125         ret = radeon_bo_reserve(rbo, false);
 126         if (likely(ret == 0)) {
 127                 radeon_bo_kunmap(rbo);
 128                 radeon_bo_unpin(rbo);
 129                 radeon_bo_unreserve(rbo);
 130         }
 131         drm_gem_object_unreference_unlocked(gobj);
 132 }
 133
 134 static int radeonfb_create_pinned_object(struct radeon_fbdev *rfbdev,
 135                                          struct drm_mode_fb_cmd2 *mode_cmd,
 136                                          struct drm_gem_object **gobj_p)
 137 {
 138         struct radeon_device *rdev = rfbdev->rdev;
 139         struct drm_gem_object *gobj = NULL;
 140         struct radeon_bo *rbo = NULL;
 141         bool fb_tiled = false; /* useful for testing */
 142         u32 tiling_flags = 0;
 143         int ret;
 144         int aligned_size, size;
 145         int height = mode_cmd->height;
 146         u32 bpp, depth;
 147
 148         drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
 149
 150         /* need to align pitch with crtc limits */
 151         mode_cmd->pitches[0] = radeon_align_pitch(rdev, mode_cmd->width, bpp,
 152                                                   fb_tiled) * ((bpp + 1) / 8);
 153
 154         if (rdev->family >= CHIP_R600)
 155                 height = ALIGN(mode_cmd->height, 8);
 156         size = mode_cmd->pitches[0] * height;
 157         aligned_size = ALIGN(size, PAGE_SIZE);
 158         ret = radeon_gem_object_create(rdev, aligned_size, 0,
 159                                        RADEON_GEM_DOMAIN_VRAM,
 160                                        0, true, &gobj);
 161         if (ret) {
 162                 printk(KERN_ERR "failed to allocate framebuffer (%d)\n",
 163                        aligned_size);
 164                 return -ENOMEM;
 165         }
 166         rbo = gem_to_radeon_bo(gobj);
 167
 168         if (fb_tiled)
 169                 tiling_flags = RADEON_TILING_MACRO;
 170
 171 #ifdef __BIG_ENDIAN
 172         switch (bpp) {
 173         case 32:
 174                 tiling_flags |= RADEON_TILING_SWAP_32BIT;
 175                 break;
 176         case 16:
 177                 tiling_flags |= RADEON_TILING_SWAP_16BIT;
 178         default:
 179                 break;
 180         }
 181 #endif
 182
 183         if (tiling_flags) {
 184                 ret = radeon_bo_set_tiling_flags(rbo,
 185                                                  tiling_flags | RADEON_TILING_SURFACE,
 186                                                  mode_cmd->pitches[0]);
 187                 if (ret)
 188                         dev_err(rdev->dev, "FB failed to set tiling flags\n");
 189         }
 190
 191
 192         ret = radeon_bo_reserve(rbo, false);
 193         if (unlikely(ret != 0))
 194                 goto out_unref;
 195         /* Only 27 bit offset for legacy CRTC */
 196         ret = radeon_bo_pin_restricted(rbo, RADEON_GEM_DOMAIN_VRAM,
 197                                        ASIC_IS_AVIVO(rdev) ? 0 : 1 << 27,
 198                                        NULL);
 199         if (ret) {
 200                 radeon_bo_unreserve(rbo);
 201                 goto out_unref;
 202         }
 203         if (fb_tiled)
 204                 radeon_bo_check_tiling(rbo, 0, 0);
 205         ret = radeon_bo_kmap(rbo, NULL);
 206         radeon_bo_unreserve(rbo);
 207         if (ret) {
 208                 goto out_unref;
 209         }
 210
 211         *gobj_p = gobj;
 212         return 0;
 213 out_unref:
 214         radeonfb_destroy_pinned_object(gobj);
 215         *gobj_p = NULL;
 216         return ret;
 217 }
 218
 219 static int radeonfb_create(struct drm_fb_helper *helper,
 220                            struct drm_fb_helper_surface_size *sizes)
 221 {
 222         struct radeon_fbdev *rfbdev =
 223                 container_of(helper, struct radeon_fbdev, helper);
 224         struct radeon_device *rdev = rfbdev->rdev;
 225         struct fb_info *info;
 226         struct drm_framebuffer *fb = NULL;
 227         struct drm_mode_fb_cmd2 mode_cmd;
 228         struct drm_gem_object *gobj = NULL;
 229         struct radeon_bo *rbo = NULL;
 230         int ret;
 231         unsigned long tmp;
 232
 233         mode_cmd.width = sizes->surface_width;
 234         mode_cmd.height = sizes->surface_height;
 235
 236         /* avivo can't scanout real 24bpp */
 237         if ((sizes->surface_bpp == 24) && ASIC_IS_AVIVO(rdev))
 238                 sizes->surface_bpp = 32;
 239
 240         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 241                                                           sizes->surface_depth);
 242
 243         ret = radeonfb_create_pinned_object(rfbdev, &mode_cmd, &gobj);
 244         if (ret) {
 245                 DRM_ERROR("failed to create fbcon object %d\n", ret);
 246                 return ret;
 247         }
 248
 249         rbo = gem_to_radeon_bo(gobj);
 250
 251         /* okay we have an object now allocate the framebuffer */
 252         info = drm_fb_helper_alloc_fbi(helper);
 253         if (IS_ERR(info)) {
 254                 ret = PTR_ERR(info);
 255                 goto out_unref;
 256         }
 257
 258         info->par = rfbdev;
 259         info->skip_vt_switch = true;
 260
 261         ret = radeon_framebuffer_init(rdev->ddev, &rfbdev->rfb, &mode_cmd, gobj);
 262         if (ret) {
 263                 DRM_ERROR("failed to initialize framebuffer %d\n", ret);
 264                 goto out_destroy_fbi;
 265         }
 266
 267         fb = &rfbdev->rfb.base;
 268
 269         /* setup helper */
 270         rfbdev->helper.fb = fb;
 271
 272         memset_io(rbo->kptr, 0x0, radeon_bo_size(rbo));
 273
 274         strcpy(info->fix.id, "radeondrmfb");
 275
 276         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 277
 278         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 279         info->fbops = &radeonfb_ops;
 280
 281         tmp = radeon_bo_gpu_offset(rbo) - rdev->mc.vram_start;
 282         info->fix.smem_start = rdev->mc.aper_base + tmp;
 283         info->fix.smem_len = radeon_bo_size(rbo);
 284         info->screen_base = rbo->kptr;
 285         info->screen_size = radeon_bo_size(rbo);
 286
 287         drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height);
 288
 289         /* setup aperture base/size for vesafb takeover */
 290         info->apertures->ranges[0].base = rdev->ddev->mode_config.fb_base;
 291         info->apertures->ranges[0].size = rdev->mc.aper_size;
 292
 293         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 294
 295         if (info->screen_base == NULL) {
 296                 ret = -ENOSPC;
 297                 goto out_destroy_fbi;
 298         }
 299
 300         DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);
 301         DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)rdev->mc.aper_base);
 302         DRM_INFO("size %lu\n", (unsigned long)radeon_bo_size(rbo));
 303         DRM_INFO("fb depth is %d\n", fb->depth);
 304         DRM_INFO("   pitch is %d\n", fb->pitches[0]);
 305
 306         vga_switcheroo_client_fb_set(rdev->ddev->pdev, info);
 307         return 0;
 308
 309 out_destroy_fbi:
 310         drm_fb_helper_release_fbi(helper);
 311 out_unref:
 312         if (rbo) {
 313
 314         }
 315         if (fb && ret) {
 316                 drm_gem_object_unreference(gobj);
 317                 drm_framebuffer_unregister_private(fb);
 318                 drm_framebuffer_cleanup(fb);
 319                 kfree(fb);
 320         }
 321         return ret;
 322 }
 323
 324 void radeon_fb_output_poll_changed(struct radeon_device *rdev)
 325 {
 326         drm_fb_helper_hotplug_event(&rdev->mode_info.rfbdev->helper);
 327 }
 328
 329 static int radeon_fbdev_destroy(struct drm_device *dev, struct radeon_fbdev *rfbdev)
 330 {
 331         struct radeon_framebuffer *rfb = &rfbdev->rfb;
 332
 333         drm_fb_helper_unregister_fbi(&rfbdev->helper);
 334         drm_fb_helper_release_fbi(&rfbdev->helper);
 335
 336         if (rfb->obj) {
 337                 radeonfb_destroy_pinned_object(rfb->obj);
 338                 rfb->obj = NULL;
 339         }
 340         drm_fb_helper_fini(&rfbdev->helper);
 341         drm_framebuffer_unregister_private(&rfb->base);
 342         drm_framebuffer_cleanup(&rfb->base);
 343
 344         return 0;
 345 }
 346
 347 static const struct drm_fb_helper_funcs radeon_fb_helper_funcs = {
 348         .gamma_set = radeon_crtc_fb_gamma_set,
 349         .gamma_get = radeon_crtc_fb_gamma_get,
 350         .fb_probe = radeonfb_create,
 351 };
 352
 353 int radeon_fbdev_init(struct radeon_device *rdev)
 354 {
 355         struct radeon_fbdev *rfbdev;
 356         int bpp_sel = 32;
 357         int ret;
 358
 359         /* select 8 bpp console on RN50 or 16MB cards */
 360         if (ASIC_IS_RN50(rdev) || rdev->mc.real_vram_size <= (32*1024*1024))
 361                 bpp_sel = 8;
 362
 363         rfbdev = kzalloc(sizeof(struct radeon_fbdev), GFP_KERNEL);
 364         if (!rfbdev)
 365                 return -ENOMEM;
 366
 367         rfbdev->rdev = rdev;
 368         rdev->mode_info.rfbdev = rfbdev;
 369
 370         drm_fb_helper_prepare(rdev->ddev, &rfbdev->helper,
 371                               &radeon_fb_helper_funcs);
 372
 373         ret = drm_fb_helper_init(rdev->ddev, &rfbdev->helper,
 374                                  rdev->num_crtc,
 375                                  RADEONFB_CONN_LIMIT);
 376         if (ret)
 377                 goto free;
 378
 379         ret = drm_fb_helper_single_add_all_connectors(&rfbdev->helper);
 380         if (ret)
 381                 goto fini;
 382
 383         /* disable all the possible outputs/crtcs before entering KMS mode */
 384         drm_helper_disable_unused_functions(rdev->ddev);
 385
 386         ret = drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
 387         if (ret)
 388                 goto fini;
 389
 390         return 0;
 391
 392 fini:
 393         drm_fb_helper_fini(&rfbdev->helper);
 394 free:
 395         kfree(rfbdev);
 396         return ret;
 397 }
 398
 399 void radeon_fbdev_fini(struct radeon_device *rdev)
 400 {
 401         if (!rdev->mode_info.rfbdev)
 402                 return;
 403
 404         radeon_fbdev_destroy(rdev->ddev, rdev->mode_info.rfbdev);
 405         kfree(rdev->mode_info.rfbdev);
 406         rdev->mode_info.rfbdev = NULL;
 407 }
 408
 409 void radeon_fbdev_set_suspend(struct radeon_device *rdev, int state)
 410 {
 411         fb_set_suspend(rdev->mode_info.rfbdev->helper.fbdev, state);
 412 }
 413
 414 bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj)
 415 {
 416         if (robj == gem_to_radeon_bo(rdev->mode_info.rfbdev->rfb.obj))
 417                 return true;
 418         return false;
 419 }
 420
 421 void radeon_fb_add_connector(struct radeon_device *rdev, struct drm_connector *connector)
 422 {
 423         drm_fb_helper_add_one_connector(&rdev->mode_info.rfbdev->helper, connector);
 424 }
 425
 426 void radeon_fb_remove_connector(struct radeon_device *rdev, struct drm_connector *connector)
 427 {
 428         drm_fb_helper_remove_one_connector(&rdev->mode_info.rfbdev->helper, connector);
 429 }