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