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     /*
  27      *  Modularization
  28      */
  29
  30 #include <linux/module.h>
  31 #include <linux/fb.h>
  32
  33 #include "drmP.h"
  34 #include "drm.h"
  35 #include "drm_crtc.h"
  36 #include "drm_crtc_helper.h"
  37 #include "radeon_drm.h"
  38 #include "radeon.h"
  39
  40 #include "drm_fb_helper.h"
  41
  42 struct radeon_fb_device {
  43         struct drm_fb_helper helper;
  44         struct radeon_framebuffer       *rfb;
  45         struct radeon_device            *rdev;
  46 };
  47
  48 static struct fb_ops radeonfb_ops = {
  49         .owner = THIS_MODULE,
  50         .fb_check_var = drm_fb_helper_check_var,
  51         .fb_set_par = drm_fb_helper_set_par,
  52         .fb_setcolreg = drm_fb_helper_setcolreg,
  53         .fb_fillrect = cfb_fillrect,
  54         .fb_copyarea = cfb_copyarea,
  55         .fb_imageblit = cfb_imageblit,
  56         .fb_pan_display = drm_fb_helper_pan_display,
  57         .fb_blank = drm_fb_helper_blank,
  58 };
  59
  60 /**
  61  * Curretly it is assumed that the old framebuffer is reused.
  62  *
  63  * LOCKING
  64  * caller should hold the mode config lock.
  65  *
  66  */
  67 int radeonfb_resize(struct drm_device *dev, struct drm_crtc *crtc)
  68 {
  69         struct fb_info *info;
  70         struct drm_framebuffer *fb;
  71         struct drm_display_mode *mode = crtc->desired_mode;
  72
  73         fb = crtc->fb;
  74         if (fb == NULL) {
  75                 return 1;
  76         }
  77         info = fb->fbdev;
  78         if (info == NULL) {
  79                 return 1;
  80         }
  81         if (mode == NULL) {
  82                 return 1;
  83         }
  84         info->var.xres = mode->hdisplay;
  85         info->var.right_margin = mode->hsync_start - mode->hdisplay;
  86         info->var.hsync_len = mode->hsync_end - mode->hsync_start;
  87         info->var.left_margin = mode->htotal - mode->hsync_end;
  88         info->var.yres = mode->vdisplay;
  89         info->var.lower_margin = mode->vsync_start - mode->vdisplay;
  90         info->var.vsync_len = mode->vsync_end - mode->vsync_start;
  91         info->var.upper_margin = mode->vtotal - mode->vsync_end;
  92         info->var.pixclock = 10000000 / mode->htotal * 1000 / mode->vtotal * 100;
  93         /* avoid overflow */
  94         info->var.pixclock = info->var.pixclock * 1000 / mode->vrefresh;
  95
  96         return 0;
  97 }
  98 EXPORT_SYMBOL(radeonfb_resize);
  99
 100 static int radeon_align_pitch(struct radeon_device *rdev, int width, int bpp, bool tiled)
 101 {
 102         int aligned = width;
 103         int align_large = (ASIC_IS_AVIVO(rdev)) || tiled;
 104         int pitch_mask = 0;
 105
 106         switch (bpp / 8) {
 107         case 1:
 108                 pitch_mask = align_large ? 255 : 127;
 109                 break;
 110         case 2:
 111                 pitch_mask = align_large ? 127 : 31;
 112                 break;
 113         case 3:
 114         case 4:
 115                 pitch_mask = align_large ? 63 : 15;
 116                 break;
 117         }
 118
 119         aligned += pitch_mask;
 120         aligned &= ~pitch_mask;
 121         return aligned;
 122 }
 123
 124 static struct drm_fb_helper_funcs radeon_fb_helper_funcs = {
 125         .gamma_set = radeon_crtc_fb_gamma_set,
 126 };
 127
 128 int radeonfb_create(struct drm_device *dev,
 129                     uint32_t fb_width, uint32_t fb_height,
 130                     uint32_t surface_width, uint32_t surface_height,
 131                     struct drm_framebuffer **fb_p)
 132 {
 133         struct radeon_device *rdev = dev->dev_private;
 134         struct fb_info *info;
 135         struct radeon_fb_device *rfbdev;
 136         struct drm_framebuffer *fb = NULL;
 137         struct radeon_framebuffer *rfb;
 138         struct drm_mode_fb_cmd mode_cmd;
 139         struct drm_gem_object *gobj = NULL;
 140         struct radeon_object *robj = NULL;
 141         struct device *device = &rdev->pdev->dev;
 142         int size, aligned_size, ret;
 143         u64 fb_gpuaddr;
 144         void *fbptr = NULL;
 145         unsigned long tmp;
 146         bool fb_tiled = false; /* useful for testing */
 147         u32 tiling_flags = 0;
 148
 149         mode_cmd.width = surface_width;
 150         mode_cmd.height = surface_height;
 151         mode_cmd.bpp = 32;
 152         /* need to align pitch with crtc limits */
 153         mode_cmd.pitch = radeon_align_pitch(rdev, mode_cmd.width, mode_cmd.bpp, fb_tiled) * ((mode_cmd.bpp + 1) / 8);
 154         mode_cmd.depth = 24;
 155
 156         size = mode_cmd.pitch * mode_cmd.height;
 157         aligned_size = ALIGN(size, PAGE_SIZE);
 158
 159         ret = radeon_gem_object_create(rdev, aligned_size, 0,
 160                         RADEON_GEM_DOMAIN_VRAM,
 161                         false, ttm_bo_type_kernel,
 162                         false, &gobj);
 163         if (ret) {
 164                 printk(KERN_ERR "failed to allocate framebuffer (%d %d)\n",
 165                        surface_width, surface_height);
 166                 ret = -ENOMEM;
 167                 goto out;
 168         }
 169         robj = gobj->driver_private;
 170
 171         if (fb_tiled)
 172                 tiling_flags = RADEON_TILING_MACRO;
 173
 174 #ifdef __BIG_ENDIAN
 175         switch (mode_cmd.bpp) {
 176         case 32:
 177                 tiling_flags |= RADEON_TILING_SWAP_32BIT;
 178                 break;
 179         case 16:
 180                 tiling_flags |= RADEON_TILING_SWAP_16BIT;
 181         default:
 182                 break;
 183         }
 184 #endif
 185
 186         if (tiling_flags)
 187                 radeon_object_set_tiling_flags(robj, tiling_flags | RADEON_TILING_SURFACE, mode_cmd.pitch);
 188         mutex_lock(&rdev->ddev->struct_mutex);
 189         fb = radeon_framebuffer_create(rdev->ddev, &mode_cmd, gobj);
 190         if (fb == NULL) {
 191                 DRM_ERROR("failed to allocate fb.\n");
 192                 ret = -ENOMEM;
 193                 goto out_unref;
 194         }
 195         ret = radeon_object_pin(robj, RADEON_GEM_DOMAIN_VRAM, &fb_gpuaddr);
 196         if (ret) {
 197                 printk(KERN_ERR "failed to pin framebuffer\n");
 198                 ret = -ENOMEM;
 199                 goto out_unref;
 200         }
 201
 202         list_add(&fb->filp_head, &rdev->ddev->mode_config.fb_kernel_list);
 203
 204         *fb_p = fb;
 205         rfb = to_radeon_framebuffer(fb);
 206         rdev->fbdev_rfb = rfb;
 207         rdev->fbdev_robj = robj;
 208
 209         info = framebuffer_alloc(sizeof(struct radeon_fb_device), device);
 210         if (info == NULL) {
 211                 ret = -ENOMEM;
 212                 goto out_unref;
 213         }
 214
 215         rdev->fbdev_info = info;
 216         rfbdev = info->par;
 217         rfbdev->helper.funcs = &radeon_fb_helper_funcs;
 218         rfbdev->helper.dev = dev;
 219         ret = drm_fb_helper_init_crtc_count(&rfbdev->helper, 2,
 220                                             RADEONFB_CONN_LIMIT);
 221         if (ret)
 222                 goto out_unref;
 223
 224         if (fb_tiled)
 225                 radeon_object_check_tiling(robj, 0, 0);
 226
 227         ret = radeon_object_kmap(robj, &fbptr);
 228         if (ret) {
 229                 goto out_unref;
 230         }
 231
 232         memset_io(fbptr, 0, aligned_size);
 233
 234         strcpy(info->fix.id, "radeondrmfb");
 235
 236         drm_fb_helper_fill_fix(info, fb->pitch);
 237
 238         info->flags = FBINFO_DEFAULT;
 239         info->fbops = &radeonfb_ops;
 240
 241         tmp = fb_gpuaddr - rdev->mc.vram_location;
 242         info->fix.smem_start = rdev->mc.aper_base + tmp;
 243         info->fix.smem_len = size;
 244         info->screen_base = fbptr;
 245         info->screen_size = size;
 246
 247         drm_fb_helper_fill_var(info, fb, fb_width, fb_height);
 248
 249         /* setup aperture base/size for vesafb takeover */
 250         info->aperture_base = rdev->ddev->mode_config.fb_base;
 251         info->aperture_size = rdev->mc.real_vram_size;
 252
 253         info->fix.mmio_start = 0;
 254         info->fix.mmio_len = 0;
 255         info->pixmap.size = 64*1024;
 256         info->pixmap.buf_align = 8;
 257         info->pixmap.access_align = 32;
 258         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 259         info->pixmap.scan_align = 1;
 260         if (info->screen_base == NULL) {
 261                 ret = -ENOSPC;
 262                 goto out_unref;
 263         }
 264         DRM_INFO("fb mappable at 0x%lX\n",  info->fix.smem_start);
 265         DRM_INFO("vram apper at 0x%lX\n",  (unsigned long)rdev->mc.aper_base);
 266         DRM_INFO("size %lu\n", (unsigned long)size);
 267         DRM_INFO("fb depth is %d\n", fb->depth);
 268         DRM_INFO("   pitch is %d\n", fb->pitch);
 269
 270         fb->fbdev = info;
 271         rfbdev->rfb = rfb;
 272         rfbdev->rdev = rdev;
 273
 274         mutex_unlock(&rdev->ddev->struct_mutex);
 275         return 0;
 276
 277 out_unref:
 278         if (robj) {
 279                 radeon_object_kunmap(robj);
 280         }
 281         if (fb && ret) {
 282                 list_del(&fb->filp_head);
 283                 drm_gem_object_unreference(gobj);
 284                 drm_framebuffer_cleanup(fb);
 285                 kfree(fb);
 286         }
 287         drm_gem_object_unreference(gobj);
 288         mutex_unlock(&rdev->ddev->struct_mutex);
 289 out:
 290         return ret;
 291 }
 292
 293 int radeonfb_probe(struct drm_device *dev)
 294 {
 295         int ret;
 296         ret = drm_fb_helper_single_fb_probe(dev, &radeonfb_create);
 297         return ret;
 298 }
 299 EXPORT_SYMBOL(radeonfb_probe);
 300
 301 int radeonfb_remove(struct drm_device *dev, struct drm_framebuffer *fb)
 302 {
 303         struct fb_info *info;
 304         struct radeon_framebuffer *rfb = to_radeon_framebuffer(fb);
 305         struct radeon_object *robj;
 306
 307         if (!fb) {
 308                 return -EINVAL;
 309         }
 310         info = fb->fbdev;
 311         if (info) {
 312                 struct radeon_fb_device *rfbdev = info->par;
 313                 robj = rfb->obj->driver_private;
 314                 unregister_framebuffer(info);
 315                 radeon_object_kunmap(robj);
 316                 radeon_object_unpin(robj);
 317                 drm_fb_helper_free(&rfbdev->helper);
 318                 framebuffer_release(info);
 319         }
 320
 321         printk(KERN_INFO "unregistered panic notifier\n");
 322
 323         return 0;
 324 }
 325 EXPORT_SYMBOL(radeonfb_remove);
 326 MODULE_LICENSE("GPL");