drivers/gpu/drm/radeon/radeon_fbdev.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
  27 #include <linux/fb.h>
  28 #include <linux/pci.h>
  29 #include <linux/pm_runtime.h>
  30 #include <linux/vga_switcheroo.h>
  31
  32 #include <drm/drm_crtc_helper.h>
  33 #include <drm/drm_drv.h>
  34 #include <drm/drm_fb_helper.h>
  35 #include <drm/drm_fourcc.h>
  36 #include <drm/drm_framebuffer.h>
  37 #include <drm/drm_gem_framebuffer_helper.h>
  38
  39 #include "radeon.h"
  40
  41 static void radeon_fbdev_destroy_pinned_object(struct drm_gem_object *gobj)
  42 {
  43         struct radeon_bo *rbo = gem_to_radeon_bo(gobj);
  44         int ret;
  45
  46         ret = radeon_bo_reserve(rbo, false);
  47         if (likely(ret == 0)) {
  48                 radeon_bo_kunmap(rbo);
  49                 radeon_bo_unpin(rbo);
  50                 radeon_bo_unreserve(rbo);
  51         }
  52         drm_gem_object_put(gobj);
  53 }
  54
  55 static int radeon_fbdev_create_pinned_object(struct drm_fb_helper *fb_helper,
  56                                              struct drm_mode_fb_cmd2 *mode_cmd,
  57                                              struct drm_gem_object **gobj_p)
  58 {
  59         const struct drm_format_info *info;
  60         struct radeon_device *rdev = fb_helper->dev->dev_private;
  61         struct drm_gem_object *gobj = NULL;
  62         struct radeon_bo *rbo = NULL;
  63         bool fb_tiled = false; /* useful for testing */
  64         u32 tiling_flags = 0;
  65         int ret;
  66         int aligned_size, size;
  67         int height = mode_cmd->height;
  68         u32 cpp;
  69
  70         info = drm_get_format_info(rdev_to_drm(rdev), mode_cmd);
  71         cpp = info->cpp[0];
  72
  73         /* need to align pitch with crtc limits */
  74         mode_cmd->pitches[0] = radeon_align_pitch(rdev, mode_cmd->width, cpp,
  75                                                   fb_tiled);
  76
  77         if (rdev->family >= CHIP_R600)
  78                 height = ALIGN(mode_cmd->height, 8);
  79         size = mode_cmd->pitches[0] * height;
  80         aligned_size = ALIGN(size, PAGE_SIZE);
  81         ret = radeon_gem_object_create(rdev, aligned_size, 0,
  82                                        RADEON_GEM_DOMAIN_VRAM,
  83                                        0, true, &gobj);
  84         if (ret) {
  85                 pr_err("failed to allocate framebuffer (%d)\n", aligned_size);
  86                 return -ENOMEM;
  87         }
  88         rbo = gem_to_radeon_bo(gobj);
  89
  90         if (fb_tiled)
  91                 tiling_flags = RADEON_TILING_MACRO;
  92
  93 #ifdef __BIG_ENDIAN
  94         switch (cpp) {
  95         case 4:
  96                 tiling_flags |= RADEON_TILING_SWAP_32BIT;
  97                 break;
  98         case 2:
  99                 tiling_flags |= RADEON_TILING_SWAP_16BIT;
 100                 break;
 101         default:
 102                 break;
 103         }
 104 #endif
 105
 106         if (tiling_flags) {
 107                 ret = radeon_bo_set_tiling_flags(rbo,
 108                                                  tiling_flags | RADEON_TILING_SURFACE,
 109                                                  mode_cmd->pitches[0]);
 110                 if (ret)
 111                         dev_err(rdev->dev, "FB failed to set tiling flags\n");
 112         }
 113
 114         ret = radeon_bo_reserve(rbo, false);
 115         if (unlikely(ret != 0))
 116                 goto err_radeon_fbdev_destroy_pinned_object;
 117         /* Only 27 bit offset for legacy CRTC */
 118         ret = radeon_bo_pin_restricted(rbo, RADEON_GEM_DOMAIN_VRAM,
 119                                        ASIC_IS_AVIVO(rdev) ? 0 : 1 << 27,
 120                                        NULL);
 121         if (ret) {
 122                 radeon_bo_unreserve(rbo);
 123                 goto err_radeon_fbdev_destroy_pinned_object;
 124         }
 125         if (fb_tiled)
 126                 radeon_bo_check_tiling(rbo, 0, 0);
 127         ret = radeon_bo_kmap(rbo, NULL);
 128         radeon_bo_unreserve(rbo);
 129         if (ret)
 130                 goto err_radeon_fbdev_destroy_pinned_object;
 131
 132         *gobj_p = gobj;
 133         return 0;
 134
 135 err_radeon_fbdev_destroy_pinned_object:
 136         radeon_fbdev_destroy_pinned_object(gobj);
 137         *gobj_p = NULL;
 138         return ret;
 139 }
 140
 141 /*
 142  * Fbdev ops and struct fb_ops
 143  */
 144
 145 static int radeon_fbdev_fb_open(struct fb_info *info, int user)
 146 {
 147         struct drm_fb_helper *fb_helper = info->par;
 148         struct radeon_device *rdev = fb_helper->dev->dev_private;
 149         int ret;
 150
 151         ret = pm_runtime_get_sync(rdev_to_drm(rdev)->dev);
 152         if (ret < 0 && ret != -EACCES)
 153                 goto err_pm_runtime_mark_last_busy;
 154
 155         return 0;
 156
 157 err_pm_runtime_mark_last_busy:
 158         pm_runtime_mark_last_busy(rdev_to_drm(rdev)->dev);
 159         pm_runtime_put_autosuspend(rdev_to_drm(rdev)->dev);
 160         return ret;
 161 }
 162
 163 static int radeon_fbdev_fb_release(struct fb_info *info, int user)
 164 {
 165         struct drm_fb_helper *fb_helper = info->par;
 166         struct radeon_device *rdev = fb_helper->dev->dev_private;
 167
 168         pm_runtime_mark_last_busy(rdev_to_drm(rdev)->dev);
 169         pm_runtime_put_autosuspend(rdev_to_drm(rdev)->dev);
 170
 171         return 0;
 172 }
 173
 174 static void radeon_fbdev_fb_destroy(struct fb_info *info)
 175 {
 176         struct drm_fb_helper *fb_helper = info->par;
 177         struct drm_framebuffer *fb = fb_helper->fb;
 178         struct drm_gem_object *gobj = drm_gem_fb_get_obj(fb, 0);
 179
 180         drm_fb_helper_fini(fb_helper);
 181
 182         drm_framebuffer_unregister_private(fb);
 183         drm_framebuffer_cleanup(fb);
 184         kfree(fb);
 185         radeon_fbdev_destroy_pinned_object(gobj);
 186
 187         drm_client_release(&fb_helper->client);
 188         drm_fb_helper_unprepare(fb_helper);
 189         kfree(fb_helper);
 190 }
 191
 192 static const struct fb_ops radeon_fbdev_fb_ops = {
 193         .owner = THIS_MODULE,
 194         .fb_open = radeon_fbdev_fb_open,
 195         .fb_release = radeon_fbdev_fb_release,
 196         FB_DEFAULT_IOMEM_OPS,
 197         DRM_FB_HELPER_DEFAULT_OPS,
 198         .fb_destroy = radeon_fbdev_fb_destroy,
 199 };
 200
 201 static const struct drm_fb_helper_funcs radeon_fbdev_fb_helper_funcs = {
 202 };
 203
 204 int radeon_fbdev_driver_fbdev_probe(struct drm_fb_helper *fb_helper,
 205                                     struct drm_fb_helper_surface_size *sizes)
 206 {
 207         struct radeon_device *rdev = fb_helper->dev->dev_private;
 208         struct drm_mode_fb_cmd2 mode_cmd = { };
 209         struct fb_info *info;
 210         struct drm_gem_object *gobj;
 211         struct radeon_bo *rbo;
 212         struct drm_framebuffer *fb;
 213         int ret;
 214         unsigned long tmp;
 215
 216         mode_cmd.width = sizes->surface_width;
 217         mode_cmd.height = sizes->surface_height;
 218
 219         /* avivo can't scanout real 24bpp */
 220         if ((sizes->surface_bpp == 24) && ASIC_IS_AVIVO(rdev))
 221                 sizes->surface_bpp = 32;
 222
 223         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 224                                                           sizes->surface_depth);
 225
 226         ret = radeon_fbdev_create_pinned_object(fb_helper, &mode_cmd, &gobj);
 227         if (ret) {
 228                 DRM_ERROR("failed to create fbcon object %d\n", ret);
 229                 return ret;
 230         }
 231         rbo = gem_to_radeon_bo(gobj);
 232
 233         fb = kzalloc(sizeof(*fb), GFP_KERNEL);
 234         if (!fb) {
 235                 ret = -ENOMEM;
 236                 goto err_radeon_fbdev_destroy_pinned_object;
 237         }
 238         ret = radeon_framebuffer_init(rdev_to_drm(rdev), fb, &mode_cmd, gobj);
 239         if (ret) {
 240                 DRM_ERROR("failed to initialize framebuffer %d\n", ret);
 241                 goto err_kfree;
 242         }
 243
 244         /* setup helper */
 245         fb_helper->funcs = &radeon_fbdev_fb_helper_funcs;
 246         fb_helper->fb = fb;
 247
 248         /* okay we have an object now allocate the framebuffer */
 249         info = drm_fb_helper_alloc_info(fb_helper);
 250         if (IS_ERR(info)) {
 251                 ret = PTR_ERR(info);
 252                 goto err_drm_framebuffer_unregister_private;
 253         }
 254
 255         info->fbops = &radeon_fbdev_fb_ops;
 256
 257         /* radeon resume is fragile and needs a vt switch to help it along */
 258         info->skip_vt_switch = false;
 259
 260         drm_fb_helper_fill_info(info, fb_helper, sizes);
 261
 262         tmp = radeon_bo_gpu_offset(rbo) - rdev->mc.vram_start;
 263         info->fix.smem_start = rdev->mc.aper_base + tmp;
 264         info->fix.smem_len = radeon_bo_size(rbo);
 265         info->screen_base = (__force void __iomem *)rbo->kptr;
 266         info->screen_size = radeon_bo_size(rbo);
 267
 268         memset_io(info->screen_base, 0, info->screen_size);
 269
 270         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 271
 272         DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);
 273         DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)rdev->mc.aper_base);
 274         DRM_INFO("size %lu\n", (unsigned long)radeon_bo_size(rbo));
 275         DRM_INFO("fb depth is %d\n", fb->format->depth);
 276         DRM_INFO("   pitch is %d\n", fb->pitches[0]);
 277
 278         return 0;
 279
 280 err_drm_framebuffer_unregister_private:
 281         fb_helper->fb = NULL;
 282         drm_framebuffer_unregister_private(fb);
 283         drm_framebuffer_cleanup(fb);
 284 err_kfree:
 285         kfree(fb);
 286 err_radeon_fbdev_destroy_pinned_object:
 287         radeon_fbdev_destroy_pinned_object(gobj);
 288         return ret;
 289 }
 290
 291 bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj)
 292 {
 293         struct drm_fb_helper *fb_helper = rdev_to_drm(rdev)->fb_helper;
 294         struct drm_gem_object *gobj;
 295
 296         if (!fb_helper)
 297                 return false;
 298
 299         gobj = drm_gem_fb_get_obj(fb_helper->fb, 0);
 300         if (!gobj)
 301                 return false;
 302         if (gobj != &robj->tbo.base)
 303                 return false;
 304
 305         return true;
 306 }