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_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 intel_fbdev *ifbdev,
  75                           struct drm_fb_helper_surface_size *sizes)
  76 {
  77         struct drm_device *dev = ifbdev->helper.dev;
  78         struct fb_info *info;
  79         struct drm_framebuffer *fb;
  80         struct drm_mode_fb_cmd mode_cmd;
  81         struct drm_gem_object *fbo = NULL;
  82         struct drm_i915_gem_object *obj_priv;
  83         struct device *device = &dev->pdev->dev;
  84         int size, ret, mmio_bar = IS_I9XX(dev) ? 0 : 1;
  85
  86         /* we don't do packed 24bpp */
  87         if (sizes->surface_bpp == 24)
  88                 sizes->surface_bpp = 32;
  89
  90         mode_cmd.width = sizes->surface_width;
  91         mode_cmd.height = sizes->surface_height;
  92
  93         mode_cmd.bpp = sizes->surface_bpp;
  94         mode_cmd.pitch = ALIGN(mode_cmd.width * ((mode_cmd.bpp + 1) / 8), 64);
  95         mode_cmd.depth = sizes->surface_depth;
  96
  97         size = mode_cmd.pitch * mode_cmd.height;
  98         size = ALIGN(size, PAGE_SIZE);
  99         fbo = drm_gem_object_alloc(dev, size);
 100         if (!fbo) {
 101                 DRM_ERROR("failed to allocate framebuffer\n");
 102                 ret = -ENOMEM;
 103                 goto out;
 104         }
 105         obj_priv = fbo->driver_private;
 106
 107         mutex_lock(&dev->struct_mutex);
 108
 109         ret = i915_gem_object_pin(fbo, 64*1024);
 110         if (ret) {
 111                 DRM_ERROR("failed to pin fb: %d\n", ret);
 112                 goto out_unref;
 113         }
 114
 115         /* Flush everything out, we'll be doing GTT only from now on */
 116         i915_gem_object_set_to_gtt_domain(fbo, 1);
 117
 118         info = framebuffer_alloc(0, device);
 119         if (!info) {
 120                 ret = -ENOMEM;
 121                 goto out_unpin;
 122         }
 123
 124         info->par = ifbdev;
 125
 126         intel_framebuffer_init(dev, &ifbdev->ifb, &mode_cmd, fbo);
 127
 128         fb = &ifbdev->ifb.base;
 129
 130         ifbdev->helper.fb = fb;
 131         ifbdev->helper.fbdev = info;
 132         ifbdev->helper.funcs = &intel_fb_helper_funcs;
 133
 134         strcpy(info->fix.id, "inteldrmfb");
 135
 136         info->flags = FBINFO_DEFAULT;
 137         info->fbops = &intelfb_ops;
 138
 139         /* setup aperture base/size for vesafb takeover */
 140         info->aperture_base = dev->mode_config.fb_base;
 141         if (IS_I9XX(dev))
 142                 info->aperture_size = pci_resource_len(dev->pdev, 2);
 143         else
 144                 info->aperture_size = pci_resource_len(dev->pdev, 0);
 145
 146         info->fix.smem_start = dev->mode_config.fb_base + obj_priv->gtt_offset;
 147         info->fix.smem_len = size;
 148
 149         info->flags = FBINFO_DEFAULT;
 150
 151         info->screen_base = ioremap_wc(dev->agp->base + obj_priv->gtt_offset,
 152                                        size);
 153         if (!info->screen_base) {
 154                 ret = -ENOSPC;
 155                 goto out_unpin;
 156         }
 157         info->screen_size = size;
 158
 159 //      memset(info->screen_base, 0, size);
 160
 161         drm_fb_helper_fill_fix(info, fb->pitch, fb->depth);
 162         drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
 163
 164         /* FIXME: we really shouldn't expose mmio space at all */
 165         info->fix.mmio_start = pci_resource_start(dev->pdev, mmio_bar);
 166         info->fix.mmio_len = pci_resource_len(dev->pdev, mmio_bar);
 167
 168         info->pixmap.size = 64*1024;
 169         info->pixmap.buf_align = 8;
 170         info->pixmap.access_align = 32;
 171         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 172         info->pixmap.scan_align = 1;
 173
 174         DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08x, bo %p\n",
 175                       fb->width, fb->height,
 176                       obj_priv->gtt_offset, fbo);
 177
 178
 179         mutex_unlock(&dev->struct_mutex);
 180         vga_switcheroo_client_fb_set(dev->pdev, info);
 181         return 0;
 182
 183 out_unpin:
 184         i915_gem_object_unpin(fbo);
 185 out_unref:
 186         drm_gem_object_unreference(fbo);
 187         mutex_unlock(&dev->struct_mutex);
 188 out:
 189         return ret;
 190 }
 191
 192 static int intel_fb_find_or_create_single(struct drm_fb_helper *helper,
 193                                           struct drm_fb_helper_surface_size *sizes)
 194 {
 195         struct intel_fbdev *ifbdev = (struct intel_fbdev *)helper;
 196         int new_fb = 0;
 197         int ret;
 198
 199         if (!helper->fb) {
 200                 ret = intelfb_create(ifbdev, sizes);
 201                 if (ret)
 202                         return ret;
 203                 new_fb = 1;
 204         }
 205         return new_fb;
 206 }
 207
 208 static int intelfb_probe(struct intel_fbdev *ifbdev)
 209 {
 210         int ret;
 211
 212         DRM_DEBUG_KMS("\n");
 213         ret = drm_fb_helper_single_fb_probe(&ifbdev->helper, 32);
 214         return ret;
 215 }
 216
 217 int intel_fbdev_destroy(struct drm_device *dev,
 218                         struct intel_fbdev *ifbdev)
 219 {
 220         struct fb_info *info;
 221         struct intel_framebuffer *ifb = &ifbdev->ifb;
 222
 223         if (ifbdev->helper.fbdev) {
 224                 info = ifbdev->helper.fbdev;
 225                 unregister_framebuffer(info);
 226                 iounmap(info->screen_base);
 227                 framebuffer_release(info);
 228         }
 229
 230         drm_fb_helper_free(&ifbdev->helper);
 231
 232         drm_framebuffer_cleanup(&ifb->base);
 233         if (ifb->obj)
 234                 drm_gem_object_unreference_unlocked(ifb->obj);
 235
 236         return 0;
 237 }
 238
 239 int intel_fbdev_init(struct drm_device *dev)
 240 {
 241         struct intel_fbdev *ifbdev;
 242         drm_i915_private_t *dev_priv = dev->dev_private;
 243
 244         ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
 245         if (!ifbdev)
 246                 return -ENOMEM;
 247
 248         dev_priv->fbdev = ifbdev;
 249
 250         drm_fb_helper_init_crtc_count(dev, &ifbdev->helper, 2,
 251                                       INTELFB_CONN_LIMIT);
 252         ifbdev->helper.fb_probe = intel_fb_find_or_create_single;
 253         drm_fb_helper_initial_config(&ifbdev->helper);
 254         intelfb_probe(ifbdev);
 255         return 0;
 256 }
 257
 258 void intel_fbdev_fini(struct drm_device *dev)
 259 {
 260         drm_i915_private_t *dev_priv = dev->dev_private;
 261         if (!dev_priv->fbdev)
 262                 return;
 263
 264         intel_fbdev_destroy(dev, dev_priv->fbdev);
 265         kfree(dev_priv->fbdev);
 266         dev_priv->fbdev = NULL;
 267 }
 268 MODULE_LICENSE("GPL and additional rights");