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/fb.h>
  28
  29 #include "drmP.h"
  30 #include "drm.h"
  31 #include "drm_crtc.h"
  32 #include "drm_crtc_helper.h"
  33 #include "radeon_drm.h"
  34 #include "radeon.h"
  35
  36 #include "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 = 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 };
  62
  63
  64 static int radeon_align_pitch(struct radeon_device *rdev, int width, int bpp, bool tiled)
  65 {
  66         int aligned = width;
  67         int align_large = (ASIC_IS_AVIVO(rdev)) || tiled;
  68         int pitch_mask = 0;
  69
  70         switch (bpp / 8) {
  71         case 1:
  72                 pitch_mask = align_large ? 255 : 127;
  73                 break;
  74         case 2:
  75                 pitch_mask = align_large ? 127 : 31;
  76                 break;
  77         case 3:
  78         case 4:
  79                 pitch_mask = align_large ? 63 : 15;
  80                 break;
  81         }
  82
  83         aligned += pitch_mask;
  84         aligned &= ~pitch_mask;
  85         return aligned;
  86 }
  87
  88 static void radeonfb_destroy_pinned_object(struct drm_gem_object *gobj)
  89 {
  90         struct radeon_bo *rbo = gobj->driver_private;
  91         int ret;
  92
  93         ret = radeon_bo_reserve(rbo, false);
  94         if (likely(ret == 0)) {
  95                 radeon_bo_kunmap(rbo);
  96                 radeon_bo_unreserve(rbo);
  97         }
  98         drm_gem_object_unreference_unlocked(gobj);
  99 }
 100
 101 static int radeonfb_create_pinned_object(struct radeon_fbdev *rfbdev,
 102                                          struct drm_mode_fb_cmd *mode_cmd,
 103                                          struct drm_gem_object **gobj_p)
 104 {
 105         struct radeon_device *rdev = rfbdev->rdev;
 106         struct drm_gem_object *gobj = NULL;
 107         struct radeon_bo *rbo = NULL;
 108         bool fb_tiled = false; /* useful for testing */
 109         u32 tiling_flags = 0;
 110         int ret;
 111         int aligned_size, size;
 112
 113         /* need to align pitch with crtc limits */
 114         mode_cmd->pitch = radeon_align_pitch(rdev, mode_cmd->width, mode_cmd->bpp, fb_tiled) * ((mode_cmd->bpp + 1) / 8);
 115
 116         size = mode_cmd->pitch * mode_cmd->height;
 117         aligned_size = ALIGN(size, PAGE_SIZE);
 118         ret = radeon_gem_object_create(rdev, aligned_size, 0,
 119                                        RADEON_GEM_DOMAIN_VRAM,
 120                                        false, ttm_bo_type_kernel,
 121                                        &gobj);
 122         if (ret) {
 123                 printk(KERN_ERR "failed to allocate framebuffer (%d)\n",
 124                        aligned_size);
 125                 return -ENOMEM;
 126         }
 127         rbo = gobj->driver_private;
 128
 129         if (fb_tiled)
 130                 tiling_flags = RADEON_TILING_MACRO;
 131
 132 #ifdef __BIG_ENDIAN
 133         switch (mode_cmd->bpp) {
 134         case 32:
 135                 tiling_flags |= RADEON_TILING_SWAP_32BIT;
 136                 break;
 137         case 16:
 138                 tiling_flags |= RADEON_TILING_SWAP_16BIT;
 139         default:
 140                 break;
 141         }
 142 #endif
 143
 144         if (tiling_flags) {
 145                 ret = radeon_bo_set_tiling_flags(rbo,
 146                                                  tiling_flags | RADEON_TILING_SURFACE,
 147                                                  mode_cmd->pitch);
 148                 if (ret)
 149                         dev_err(rdev->dev, "FB failed to set tiling flags\n");
 150         }
 151
 152
 153         ret = radeon_bo_reserve(rbo, false);
 154         if (unlikely(ret != 0))
 155                 goto out_unref;
 156         ret = radeon_bo_pin(rbo, RADEON_GEM_DOMAIN_VRAM, NULL);
 157         if (ret) {
 158                 radeon_bo_unreserve(rbo);
 159                 goto out_unref;
 160         }
 161         if (fb_tiled)
 162                 radeon_bo_check_tiling(rbo, 0, 0);
 163         ret = radeon_bo_kmap(rbo, NULL);
 164         radeon_bo_unreserve(rbo);
 165         if (ret) {
 166                 goto out_unref;
 167         }
 168
 169         *gobj_p = gobj;
 170         return 0;
 171 out_unref:
 172         radeonfb_destroy_pinned_object(gobj);
 173         *gobj_p = NULL;
 174         return ret;
 175 }
 176
 177 static int radeonfb_create(struct radeon_fbdev *rfbdev,
 178                            struct drm_fb_helper_surface_size *sizes)
 179 {
 180         struct radeon_device *rdev = rfbdev->rdev;
 181         struct fb_info *info;
 182         struct drm_framebuffer *fb = NULL;
 183         struct drm_mode_fb_cmd mode_cmd;
 184         struct drm_gem_object *gobj = NULL;
 185         struct radeon_bo *rbo = NULL;
 186         struct device *device = &rdev->pdev->dev;
 187         int ret;
 188         unsigned long tmp;
 189
 190         mode_cmd.width = sizes->surface_width;
 191         mode_cmd.height = sizes->surface_height;
 192
 193         /* avivo can't scanout real 24bpp */
 194         if ((sizes->surface_bpp == 24) && ASIC_IS_AVIVO(rdev))
 195                 sizes->surface_bpp = 32;
 196
 197         mode_cmd.bpp = sizes->surface_bpp;
 198         mode_cmd.depth = sizes->surface_depth;
 199
 200         ret = radeonfb_create_pinned_object(rfbdev, &mode_cmd, &gobj);
 201         rbo = gobj->driver_private;
 202
 203         /* okay we have an object now allocate the framebuffer */
 204         info = framebuffer_alloc(0, device);
 205         if (info == NULL) {
 206                 ret = -ENOMEM;
 207                 goto out_unref;
 208         }
 209
 210         info->par = rfbdev;
 211
 212         radeon_framebuffer_init(rdev->ddev, &rfbdev->rfb, &mode_cmd, gobj);
 213
 214         fb = &rfbdev->rfb.base;
 215
 216         /* setup helper */
 217         rfbdev->helper.fb = fb;
 218         rfbdev->helper.fbdev = info;
 219
 220         memset_io(rbo->kptr, 0x0, radeon_bo_size(rbo));
 221
 222         strcpy(info->fix.id, "radeondrmfb");
 223
 224         drm_fb_helper_fill_fix(info, fb->pitch, fb->depth);
 225
 226         info->flags = FBINFO_DEFAULT;
 227         info->fbops = &radeonfb_ops;
 228
 229         tmp = radeon_bo_gpu_offset(rbo) - rdev->mc.vram_start;
 230         info->fix.smem_start = rdev->mc.aper_base + tmp;
 231         info->fix.smem_len = radeon_bo_size(rbo);
 232         info->screen_base = rbo->kptr;
 233         info->screen_size = radeon_bo_size(rbo);
 234
 235         drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height);
 236
 237         /* setup aperture base/size for vesafb takeover */
 238         info->aperture_base = rdev->ddev->mode_config.fb_base;
 239         info->aperture_size = rdev->mc.real_vram_size;
 240
 241         info->fix.mmio_start = 0;
 242         info->fix.mmio_len = 0;
 243         info->pixmap.size = 64*1024;
 244         info->pixmap.buf_align = 8;
 245         info->pixmap.access_align = 32;
 246         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 247         info->pixmap.scan_align = 1;
 248
 249         if (info->screen_base == NULL) {
 250                 ret = -ENOSPC;
 251                 goto out_unref;
 252         }
 253
 254         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 255         if (ret) {
 256                 ret = -ENOMEM;
 257                 goto out_unref;
 258         }
 259
 260         DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);
 261         DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)rdev->mc.aper_base);
 262         DRM_INFO("size %lu\n", (unsigned long)radeon_bo_size(rbo));
 263         DRM_INFO("fb depth is %d\n", fb->depth);
 264         DRM_INFO("   pitch is %d\n", fb->pitch);
 265
 266         vga_switcheroo_client_fb_set(rdev->ddev->pdev, info);
 267         return 0;
 268
 269 out_unref:
 270         if (rbo) {
 271
 272         }
 273         if (fb && ret) {
 274                 drm_gem_object_unreference(gobj);
 275                 drm_framebuffer_cleanup(fb);
 276                 kfree(fb);
 277         }
 278         return ret;
 279 }
 280
 281 static int radeon_fb_find_or_create_single(struct drm_fb_helper *helper,
 282                                            struct drm_fb_helper_surface_size *sizes)
 283 {
 284         struct radeon_fbdev *rfbdev = (struct radeon_fbdev *)helper;
 285         int new_fb = 0;
 286         int ret;
 287
 288         if (!helper->fb) {
 289                 ret = radeonfb_create(rfbdev, sizes);
 290                 if (ret)
 291                         return ret;
 292                 new_fb = 1;
 293         }
 294         return new_fb;
 295 }
 296
 297 static char *mode_option;
 298 int radeon_parse_options(char *options)
 299 {
 300         char *this_opt;
 301
 302         if (!options || !*options)
 303                 return 0;
 304
 305         while ((this_opt = strsep(&options, ",")) != NULL) {
 306                 if (!*this_opt)
 307                         continue;
 308                 mode_option = this_opt;
 309         }
 310         return 0;
 311 }
 312
 313 void radeonfb_hotplug(struct drm_device *dev, bool polled)
 314 {
 315         struct radeon_device *rdev = dev->dev_private;
 316
 317         drm_helper_fb_hpd_irq_event(&rdev->mode_info.rfbdev->helper);
 318 }
 319
 320 static void radeon_fb_output_status_changed(struct drm_fb_helper *fb_helper)
 321 {
 322         drm_helper_fb_hotplug_event(fb_helper, true);
 323 }
 324
 325 static int radeon_fbdev_destroy(struct drm_device *dev, struct radeon_fbdev *rfbdev)
 326 {
 327         struct fb_info *info;
 328         struct radeon_framebuffer *rfb = &rfbdev->rfb;
 329         struct radeon_bo *rbo;
 330         int r;
 331
 332         if (rfbdev->helper.fbdev) {
 333                 info = rfbdev->helper.fbdev;
 334
 335                 unregister_framebuffer(info);
 336                 if (info->cmap.len)
 337                         fb_dealloc_cmap(&info->cmap);
 338                 framebuffer_release(info);
 339         }
 340
 341         if (rfb->obj) {
 342                 rbo = rfb->obj->driver_private;
 343                 r = radeon_bo_reserve(rbo, false);
 344                 if (likely(r == 0)) {
 345                         radeon_bo_kunmap(rbo);
 346                         radeon_bo_unpin(rbo);
 347                         radeon_bo_unreserve(rbo);
 348                 }
 349                 drm_gem_object_unreference_unlocked(rfb->obj);
 350         }
 351         drm_fb_helper_fini(&rfbdev->helper);
 352         drm_framebuffer_cleanup(&rfb->base);
 353
 354         return 0;
 355 }
 356
 357 static struct drm_fb_helper_funcs radeon_fb_helper_funcs = {
 358         .gamma_set = radeon_crtc_fb_gamma_set,
 359         .gamma_get = radeon_crtc_fb_gamma_get,
 360         .fb_probe = radeon_fb_find_or_create_single,
 361         .fb_output_status_changed = radeon_fb_output_status_changed,
 362 };
 363
 364 int radeon_fbdev_init(struct radeon_device *rdev)
 365 {
 366         struct radeon_fbdev *rfbdev;
 367         int bpp_sel = 32;
 368
 369         /* select 8 bpp console on RN50 or 16MB cards */
 370         if (ASIC_IS_RN50(rdev) || rdev->mc.real_vram_size <= (32*1024*1024))
 371                 bpp_sel = 8;
 372
 373         rfbdev = kzalloc(sizeof(struct radeon_fbdev), GFP_KERNEL);
 374         if (!rfbdev)
 375                 return -ENOMEM;
 376
 377         rfbdev->rdev = rdev;
 378         rdev->mode_info.rfbdev = rfbdev;
 379         rfbdev->helper.funcs = &radeon_fb_helper_funcs;
 380
 381         drm_fb_helper_init(rdev->ddev, &rfbdev->helper,
 382                            rdev->num_crtc,
 383                            RADEONFB_CONN_LIMIT, true);
 384         drm_fb_helper_single_add_all_connectors(&rfbdev->helper);
 385         drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
 386         return 0;
 387
 388 }
 389
 390 void radeon_fbdev_fini(struct radeon_device *rdev)
 391 {
 392         if (!rdev->mode_info.rfbdev)
 393                 return;
 394
 395         radeon_fbdev_destroy(rdev->ddev, rdev->mode_info.rfbdev);
 396         kfree(rdev->mode_info.rfbdev);
 397         rdev->mode_info.rfbdev = NULL;
 398 }
 399
 400 void radeon_fbdev_set_suspend(struct radeon_device *rdev, int state)
 401 {
 402         fb_set_suspend(rdev->mode_info.rfbdev->helper.fbdev, state);
 403 }
 404
 405 int radeon_fbdev_total_size(struct radeon_device *rdev)
 406 {
 407         struct radeon_bo *robj;
 408         int size = 0;
 409
 410         robj = rdev->mode_info.rfbdev->rfb.obj->driver_private;
 411         size += radeon_bo_size(robj);
 412         return size;
 413 }
 414
 415 bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj)
 416 {
 417         if (robj == rdev->mode_info.rfbdev->rfb.obj->driver_private)
 418                 return true;
 419         return false;
 420 }