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 "drmP.h"
  31 #include "drm.h"
  32 #include "drm_crtc.h"
  33 #include "drm_crtc_helper.h"
  34 #include "radeon_drm.h"
  35 #include "radeon.h"
  36
  37 #include "drm_fb_helper.h"
  38
  39 #include <linux/vga_switcheroo.h>
  40
  41 /* object hierarchy -
  42    this contains a helper + a radeon fb
  43    the helper contains a pointer to radeon framebuffer baseclass.
  44 */
  45 struct radeon_fbdev {
  46         struct drm_fb_helper helper;
  47         struct radeon_framebuffer rfb;
  48         struct list_head fbdev_list;
  49         struct radeon_device *rdev;
  50 };
  51
  52 static struct fb_ops radeonfb_ops = {
  53         .owner = THIS_MODULE,
  54         .fb_check_var = drm_fb_helper_check_var,
  55         .fb_set_par = drm_fb_helper_set_par,
  56         .fb_fillrect = cfb_fillrect,
  57         .fb_copyarea = cfb_copyarea,
  58         .fb_imageblit = cfb_imageblit,
  59         .fb_pan_display = drm_fb_helper_pan_display,
  60         .fb_blank = drm_fb_helper_blank,
  61         .fb_setcmap = drm_fb_helper_setcmap,
  62         .fb_debug_enter = drm_fb_helper_debug_enter,
  63         .fb_debug_leave = drm_fb_helper_debug_leave,
  64 };
  65
  66
  67 int radeon_align_pitch(struct radeon_device *rdev, int width, int bpp, bool tiled)
  68 {
  69         int aligned = width;
  70         int align_large = (ASIC_IS_AVIVO(rdev)) || tiled;
  71         int pitch_mask = 0;
  72
  73         switch (bpp / 8) {
  74         case 1:
  75                 pitch_mask = align_large ? 255 : 127;
  76                 break;
  77         case 2:
  78                 pitch_mask = align_large ? 127 : 31;
  79                 break;
  80         case 3:
  81         case 4:
  82                 pitch_mask = align_large ? 63 : 15;
  83                 break;
  84         }
  85
  86         aligned += pitch_mask;
  87         aligned &= ~pitch_mask;
  88         return aligned;
  89 }
  90
  91 static void radeonfb_destroy_pinned_object(struct drm_gem_object *gobj)
  92 {
  93         struct radeon_bo *rbo = gem_to_radeon_bo(gobj);
  94         int ret;
  95
  96         ret = radeon_bo_reserve(rbo, false);
  97         if (likely(ret == 0)) {
  98                 radeon_bo_kunmap(rbo);
  99                 radeon_bo_unpin(rbo);
 100                 radeon_bo_unreserve(rbo);
 101         }
 102         drm_gem_object_unreference_unlocked(gobj);
 103 }
 104
 105 static int radeonfb_create_pinned_object(struct radeon_fbdev *rfbdev,
 106                                          struct drm_mode_fb_cmd2 *mode_cmd,
 107                                          struct drm_gem_object **gobj_p)
 108 {
 109         struct radeon_device *rdev = rfbdev->rdev;
 110         struct drm_gem_object *gobj = NULL;
 111         struct radeon_bo *rbo = NULL;
 112         bool fb_tiled = false; /* useful for testing */
 113         u32 tiling_flags = 0;
 114         int ret;
 115         int aligned_size, size;
 116         int height = mode_cmd->height;
 117         u32 bpp, depth;
 118
 119         drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
 120
 121         /* need to align pitch with crtc limits */
 122         mode_cmd->pitches[0] = radeon_align_pitch(rdev, mode_cmd->width, bpp,
 123                                                   fb_tiled) * ((bpp + 1) / 8);
 124
 125         if (rdev->family >= CHIP_R600)
 126                 height = ALIGN(mode_cmd->height, 8);
 127         size = mode_cmd->pitches[0] * height;
 128         aligned_size = ALIGN(size, PAGE_SIZE);
 129         ret = radeon_gem_object_create(rdev, aligned_size, 0,
 130                                        RADEON_GEM_DOMAIN_VRAM,
 131                                        false, true,
 132                                        &gobj);
 133         if (ret) {
 134                 printk(KERN_ERR "failed to allocate framebuffer (%d)\n",
 135                        aligned_size);
 136                 return -ENOMEM;
 137         }
 138         rbo = gem_to_radeon_bo(gobj);
 139
 140         if (fb_tiled)
 141                 tiling_flags = RADEON_TILING_MACRO;
 142
 143 #ifdef __BIG_ENDIAN
 144         switch (bpp) {
 145         case 32:
 146                 tiling_flags |= RADEON_TILING_SWAP_32BIT;
 147                 break;
 148         case 16:
 149                 tiling_flags |= RADEON_TILING_SWAP_16BIT;
 150         default:
 151                 break;
 152         }
 153 #endif
 154
 155         if (tiling_flags) {
 156                 ret = radeon_bo_set_tiling_flags(rbo,
 157                                                  tiling_flags | RADEON_TILING_SURFACE,
 158                                                  mode_cmd->pitches[0]);
 159                 if (ret)
 160                         dev_err(rdev->dev, "FB failed to set tiling flags\n");
 161         }
 162
 163
 164         ret = radeon_bo_reserve(rbo, false);
 165         if (unlikely(ret != 0))
 166                 goto out_unref;
 167         ret = radeon_bo_pin(rbo, RADEON_GEM_DOMAIN_VRAM, NULL);
 168         if (ret) {
 169                 radeon_bo_unreserve(rbo);
 170                 goto out_unref;
 171         }
 172         if (fb_tiled)
 173                 radeon_bo_check_tiling(rbo, 0, 0);
 174         ret = radeon_bo_kmap(rbo, NULL);
 175         radeon_bo_unreserve(rbo);
 176         if (ret) {
 177                 goto out_unref;
 178         }
 179
 180         *gobj_p = gobj;
 181         return 0;
 182 out_unref:
 183         radeonfb_destroy_pinned_object(gobj);
 184         *gobj_p = NULL;
 185         return ret;
 186 }
 187
 188 static int radeonfb_create(struct radeon_fbdev *rfbdev,
 189                            struct drm_fb_helper_surface_size *sizes)
 190 {
 191         struct radeon_device *rdev = rfbdev->rdev;
 192         struct fb_info *info;
 193         struct drm_framebuffer *fb = NULL;
 194         struct drm_mode_fb_cmd2 mode_cmd;
 195         struct drm_gem_object *gobj = NULL;
 196         struct radeon_bo *rbo = NULL;
 197         struct device *device = &rdev->pdev->dev;
 198         int ret;
 199         unsigned long tmp;
 200
 201         mode_cmd.width = sizes->surface_width;
 202         mode_cmd.height = sizes->surface_height;
 203
 204         /* avivo can't scanout real 24bpp */
 205         if ((sizes->surface_bpp == 24) && ASIC_IS_AVIVO(rdev))
 206                 sizes->surface_bpp = 32;
 207
 208         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 209                                                           sizes->surface_depth);
 210
 211         ret = radeonfb_create_pinned_object(rfbdev, &mode_cmd, &gobj);
 212         if (ret) {
 213                 DRM_ERROR("failed to create fbcon object %d\n", ret);
 214                 return ret;
 215         }
 216
 217         rbo = gem_to_radeon_bo(gobj);
 218
 219         /* okay we have an object now allocate the framebuffer */
 220         info = framebuffer_alloc(0, device);
 221         if (info == NULL) {
 222                 ret = -ENOMEM;
 223                 goto out_unref;
 224         }
 225
 226         info->par = rfbdev;
 227
 228         ret = radeon_framebuffer_init(rdev->ddev, &rfbdev->rfb, &mode_cmd, gobj);
 229         if (ret) {
 230                 DRM_ERROR("failed to initalise framebuffer %d\n", ret);
 231                 goto out_unref;
 232         }
 233
 234         fb = &rfbdev->rfb.base;
 235
 236         /* setup helper */
 237         rfbdev->helper.fb = fb;
 238         rfbdev->helper.fbdev = info;
 239
 240         memset_io(rbo->kptr, 0x0, radeon_bo_size(rbo));
 241
 242         strcpy(info->fix.id, "radeondrmfb");
 243
 244         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 245
 246         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 247         info->fbops = &radeonfb_ops;
 248
 249         tmp = radeon_bo_gpu_offset(rbo) - rdev->mc.vram_start;
 250         info->fix.smem_start = rdev->mc.aper_base + tmp;
 251         info->fix.smem_len = radeon_bo_size(rbo);
 252         info->screen_base = rbo->kptr;
 253         info->screen_size = radeon_bo_size(rbo);
 254
 255         drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height);
 256
 257         /* setup aperture base/size for vesafb takeover */
 258         info->apertures = alloc_apertures(1);
 259         if (!info->apertures) {
 260                 ret = -ENOMEM;
 261                 goto out_unref;
 262         }
 263         info->apertures->ranges[0].base = rdev->ddev->mode_config.fb_base;
 264         info->apertures->ranges[0].size = rdev->mc.aper_size;
 265
 266         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 267
 268         if (info->screen_base == NULL) {
 269                 ret = -ENOSPC;
 270                 goto out_unref;
 271         }
 272
 273         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 274         if (ret) {
 275                 ret = -ENOMEM;
 276                 goto out_unref;
 277         }
 278
 279         DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);
 280         DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)rdev->mc.aper_base);
 281         DRM_INFO("size %lu\n", (unsigned long)radeon_bo_size(rbo));
 282         DRM_INFO("fb depth is %d\n", fb->depth);
 283         DRM_INFO("   pitch is %d\n", fb->pitches[0]);
 284
 285         vga_switcheroo_client_fb_set(rdev->ddev->pdev, info);
 286         return 0;
 287
 288 out_unref:
 289         if (rbo) {
 290
 291         }
 292         if (fb && ret) {
 293                 drm_gem_object_unreference(gobj);
 294                 drm_framebuffer_cleanup(fb);
 295                 kfree(fb);
 296         }
 297         return ret;
 298 }
 299
 300 static int radeon_fb_find_or_create_single(struct drm_fb_helper *helper,
 301                                            struct drm_fb_helper_surface_size *sizes)
 302 {
 303         struct radeon_fbdev *rfbdev = (struct radeon_fbdev *)helper;
 304         int new_fb = 0;
 305         int ret;
 306
 307         if (!helper->fb) {
 308                 ret = radeonfb_create(rfbdev, sizes);
 309                 if (ret)
 310                         return ret;
 311                 new_fb = 1;
 312         }
 313         return new_fb;
 314 }
 315
 316 static char *mode_option;
 317 int radeon_parse_options(char *options)
 318 {
 319         char *this_opt;
 320
 321         if (!options || !*options)
 322                 return 0;
 323
 324         while ((this_opt = strsep(&options, ",")) != NULL) {
 325                 if (!*this_opt)
 326                         continue;
 327                 mode_option = this_opt;
 328         }
 329         return 0;
 330 }
 331
 332 void radeon_fb_output_poll_changed(struct radeon_device *rdev)
 333 {
 334         drm_fb_helper_hotplug_event(&rdev->mode_info.rfbdev->helper);
 335 }
 336
 337 static int radeon_fbdev_destroy(struct drm_device *dev, struct radeon_fbdev *rfbdev)
 338 {
 339         struct fb_info *info;
 340         struct radeon_framebuffer *rfb = &rfbdev->rfb;
 341
 342         if (rfbdev->helper.fbdev) {
 343                 info = rfbdev->helper.fbdev;
 344
 345                 unregister_framebuffer(info);
 346                 if (info->cmap.len)
 347                         fb_dealloc_cmap(&info->cmap);
 348                 framebuffer_release(info);
 349         }
 350
 351         if (rfb->obj) {
 352                 radeonfb_destroy_pinned_object(rfb->obj);
 353                 rfb->obj = NULL;
 354         }
 355         drm_fb_helper_fini(&rfbdev->helper);
 356         drm_framebuffer_cleanup(&rfb->base);
 357
 358         return 0;
 359 }
 360
 361 static struct drm_fb_helper_funcs radeon_fb_helper_funcs = {
 362         .gamma_set = radeon_crtc_fb_gamma_set,
 363         .gamma_get = radeon_crtc_fb_gamma_get,
 364         .fb_probe = radeon_fb_find_or_create_single,
 365 };
 366
 367 int radeon_fbdev_init(struct radeon_device *rdev)
 368 {
 369         struct radeon_fbdev *rfbdev;
 370         int bpp_sel = 32;
 371         int ret;
 372
 373         /* select 8 bpp console on RN50 or 16MB cards */
 374         if (ASIC_IS_RN50(rdev) || rdev->mc.real_vram_size <= (32*1024*1024))
 375                 bpp_sel = 8;
 376
 377         rfbdev = kzalloc(sizeof(struct radeon_fbdev), GFP_KERNEL);
 378         if (!rfbdev)
 379                 return -ENOMEM;
 380
 381         rfbdev->rdev = rdev;
 382         rdev->mode_info.rfbdev = rfbdev;
 383         rfbdev->helper.funcs = &radeon_fb_helper_funcs;
 384
 385         ret = drm_fb_helper_init(rdev->ddev, &rfbdev->helper,
 386                                  rdev->num_crtc,
 387                                  RADEONFB_CONN_LIMIT);
 388         if (ret) {
 389                 kfree(rfbdev);
 390                 return ret;
 391         }
 392
 393         drm_fb_helper_single_add_all_connectors(&rfbdev->helper);
 394         drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
 395         return 0;
 396 }
 397
 398 void radeon_fbdev_fini(struct radeon_device *rdev)
 399 {
 400         if (!rdev->mode_info.rfbdev)
 401                 return;
 402
 403         radeon_fbdev_destroy(rdev->ddev, rdev->mode_info.rfbdev);
 404         kfree(rdev->mode_info.rfbdev);
 405         rdev->mode_info.rfbdev = NULL;
 406 }
 407
 408 void radeon_fbdev_set_suspend(struct radeon_device *rdev, int state)
 409 {
 410         fb_set_suspend(rdev->mode_info.rfbdev->helper.fbdev, state);
 411 }
 412
 413 int radeon_fbdev_total_size(struct radeon_device *rdev)
 414 {
 415         struct radeon_bo *robj;
 416         int size = 0;
 417
 418         robj = gem_to_radeon_bo(rdev->mode_info.rfbdev->rfb.obj);
 419         size += radeon_bo_size(robj);
 420         return size;
 421 }
 422
 423 bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj)
 424 {
 425         if (robj == gem_to_radeon_bo(rdev->mode_info.rfbdev->rfb.obj))
 426                 return true;
 427         return false;
 428 }