SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/gpu/drm/i915/intel_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 #include <linux/module.h>
  28 #include <linux/kernel.h>
  29 #include <linux/errno.h>
  30 #include <linux/string.h>
  31 #include <linux/mm.h>
  32 #include <linux/tty.h>
  33 #include <linux/slab.h>
  34 #include <linux/sysrq.h>
  35 #include <linux/delay.h>
  36 #include <linux/fb.h>
  37 #include <linux/init.h>
  38 #include <linux/vga_switcheroo.h>
  39
  40 #include "drmP.h"
  41 #include "drm.h"
  42 #include "drm_crtc.h"
  43 #include "drm_fb_helper.h"
  44 #include "intel_drv.h"
  45 #include "i915_drm.h"
  46 #include "i915_drv.h"
  47
  48 struct intel_kernel_fbdev {
  49         struct drm_fb_helper helper;
  50         struct intel_framebuffer ifb;
  51         struct list_head fbdev_list;
  52         struct drm_display_mode *our_mode;
  53 };
  54
  55 static struct fb_ops intelfb_ops = {
  56         .owner = THIS_MODULE,
  57         .fb_check_var = drm_fb_helper_check_var,
  58         .fb_set_par = drm_fb_helper_set_par,
  59         .fb_setcolreg = drm_fb_helper_setcolreg,
  60         .fb_fillrect = cfb_fillrect,
  61         .fb_copyarea = cfb_copyarea,
  62         .fb_imageblit = cfb_imageblit,
  63         .fb_pan_display = drm_fb_helper_pan_display,
  64         .fb_blank = drm_fb_helper_blank,
  65         .fb_setcmap = drm_fb_helper_setcmap,
  66 };
  67
  68 static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
  69         .gamma_set = intel_crtc_fb_gamma_set,
  70         .gamma_get = intel_crtc_fb_gamma_get,
  71 };
  72
  73
  74 static int intelfb_create(struct drm_device *dev,
  75                           struct drm_fb_helper_surface_size *sizes,
  76                           struct intel_kernel_fbdev **ifbdev_p)
  77 {
  78         struct fb_info *info;
  79         struct intel_kernel_fbdev *ifbdev;
  80         struct drm_framebuffer *fb;
  81         struct intel_framebuffer *intel_fb;
  82         struct drm_mode_fb_cmd mode_cmd;
  83         struct drm_gem_object *fbo = NULL;
  84         struct drm_i915_gem_object *obj_priv;
  85         struct device *device = &dev->pdev->dev;
  86         int size, ret, mmio_bar = IS_I9XX(dev) ? 0 : 1;
  87
  88         /* we don't do packed 24bpp */
  89         if (sizes->surface_bpp == 24)
  90                 sizes->surface_bpp = 32;
  91
  92         mode_cmd.width = sizes->surface_width;
  93         mode_cmd.height = sizes->surface_height;
  94
  95         mode_cmd.bpp = sizes->surface_bpp;
  96         mode_cmd.pitch = ALIGN(mode_cmd.width * ((mode_cmd.bpp + 1) / 8), 64);
  97         mode_cmd.depth = sizes->surface_depth;
  98
  99         size = mode_cmd.pitch * mode_cmd.height;
 100         size = ALIGN(size, PAGE_SIZE);
 101         fbo = drm_gem_object_alloc(dev, size);
 102         if (!fbo) {
 103                 DRM_ERROR("failed to allocate framebuffer\n");
 104                 ret = -ENOMEM;
 105                 goto out;
 106         }
 107         obj_priv = fbo->driver_private;
 108
 109         mutex_lock(&dev->struct_mutex);
 110
 111         ret = i915_gem_object_pin(fbo, 64*1024);
 112         if (ret) {
 113                 DRM_ERROR("failed to pin fb: %d\n", ret);
 114                 goto out_unref;
 115         }
 116
 117         /* Flush everything out, we'll be doing GTT only from now on */
 118         i915_gem_object_set_to_gtt_domain(fbo, 1);
 119
 120         info = framebuffer_alloc(sizeof(struct intel_kernel_fbdev), device);
 121         if (!info) {
 122                 ret = -ENOMEM;
 123                 goto out_unpin;
 124         }
 125
 126         ifbdev = info->par;
 127         intel_framebuffer_init(dev, &ifbdev->ifb, &mode_cmd, fbo);
 128
 129         fb = &ifbdev->ifb.base;
 130
 131         ifbdev->helper.fb = fb;
 132         ifbdev->helper.fbdev = info;
 133         ifbdev->helper.funcs = &intel_fb_helper_funcs;
 134         ifbdev->helper.dev = dev;
 135
 136         *ifbdev_p = ifbdev;
 137
 138         ret = drm_fb_helper_init_crtc_count(&ifbdev->helper, 2,
 139                                             INTELFB_CONN_LIMIT);
 140         if (ret)
 141                 goto out_unref;
 142
 143         strcpy(info->fix.id, "inteldrmfb");
 144
 145         info->flags = FBINFO_DEFAULT;
 146
 147         info->fbops = &intelfb_ops;
 148
 149
 150         /* setup aperture base/size for vesafb takeover */
 151         info->aperture_base = dev->mode_config.fb_base;
 152         if (IS_I9XX(dev))
 153                 info->aperture_size = pci_resource_len(dev->pdev, 2);
 154         else
 155                 info->aperture_size = pci_resource_len(dev->pdev, 0);
 156
 157         info->fix.smem_start = dev->mode_config.fb_base + obj_priv->gtt_offset;
 158         info->fix.smem_len = size;
 159
 160         info->flags = FBINFO_DEFAULT;
 161
 162         info->screen_base = ioremap_wc(dev->agp->base + obj_priv->gtt_offset,
 163                                        size);
 164         if (!info->screen_base) {
 165                 ret = -ENOSPC;
 166                 goto out_unpin;
 167         }
 168         info->screen_size = size;
 169
 170 //      memset(info->screen_base, 0, size);
 171
 172         drm_fb_helper_fill_fix(info, fb->pitch, fb->depth);
 173         drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
 174
 175         /* FIXME: we really shouldn't expose mmio space at all */
 176         info->fix.mmio_start = pci_resource_start(dev->pdev, mmio_bar);
 177         info->fix.mmio_len = pci_resource_len(dev->pdev, mmio_bar);
 178
 179         info->pixmap.size = 64*1024;
 180         info->pixmap.buf_align = 8;
 181         info->pixmap.access_align = 32;
 182         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 183         info->pixmap.scan_align = 1;
 184
 185         DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08x, bo %p\n",
 186                         intel_fb->base.width, intel_fb->base.height,
 187                         obj_priv->gtt_offset, fbo);
 188
 189
 190         mutex_unlock(&dev->struct_mutex);
 191         vga_switcheroo_client_fb_set(dev->pdev, info);
 192         return 0;
 193
 194 out_unpin:
 195         i915_gem_object_unpin(fbo);
 196 out_unref:
 197         drm_gem_object_unreference(fbo);
 198         mutex_unlock(&dev->struct_mutex);
 199 out:
 200         return ret;
 201 }
 202
 203 static int intel_fb_find_or_create_single(struct drm_device *dev,
 204                                           struct drm_fb_helper_surface_size *sizes,
 205                                           struct drm_fb_helper **fb_ptr)
 206 {
 207         drm_i915_private_t *dev_priv = dev->dev_private;
 208         struct intel_kernel_fbdev *ifbdev = NULL;
 209         int new_fb = 0;
 210         int ret;
 211
 212         if (!dev_priv->fbdev) {
 213                 ret = intelfb_create(dev, sizes,
 214                                      &ifbdev);
 215                 if (ret)
 216                         return ret;
 217
 218                 dev_priv->fbdev = ifbdev;
 219                 new_fb = 1;
 220         } else {
 221                 ifbdev = dev_priv->fbdev;
 222                 if (ifbdev->ifb.base.width < sizes->surface_width ||
 223                     ifbdev->ifb.base.height < sizes->surface_height) {
 224                         DRM_ERROR("Framebuffer not large enough to scale console onto.\n");
 225                         return -EINVAL;
 226                 }
 227         }
 228
 229         *fb_ptr = &ifbdev->helper;
 230         return new_fb;
 231 }
 232
 233 static int intelfb_probe(struct drm_device *dev)
 234 {
 235         int ret;
 236
 237         DRM_DEBUG_KMS("\n");
 238         ret = drm_fb_helper_single_fb_probe(dev, 32, intel_fb_find_or_create_single);
 239         return ret;
 240 }
 241
 242 int intel_fbdev_destroy(struct drm_device *dev,
 243                         struct intel_kernel_fbdev *ifbdev)
 244 {
 245         struct fb_info *info;
 246         struct intel_framebuffer *ifb = &ifbdev->ifb;
 247
 248         info = ifbdev->helper.fbdev;
 249
 250         unregister_framebuffer(info);
 251         iounmap(info->screen_base);
 252         drm_fb_helper_free(&ifbdev->helper);
 253
 254         drm_framebuffer_cleanup(&ifb->base);
 255         drm_gem_object_unreference_unlocked(ifb->obj);
 256
 257         framebuffer_release(info);
 258
 259         return 0;
 260 }
 261
 262 int intel_fbdev_init(struct drm_device *dev)
 263 {
 264         drm_helper_initial_config(dev);
 265         intelfb_probe(dev);
 266         return 0;
 267 }
 268
 269 void intel_fbdev_fini(struct drm_device *dev)
 270 {
 271         drm_i915_private_t *dev_priv = dev->dev_private;
 272         intel_fbdev_destroy(dev, dev_priv->fbdev);
 273         dev_priv->fbdev = NULL;
 274 }
 275 MODULE_LICENSE("GPL and additional rights");