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/sysrq.h>
  34 #include <linux/delay.h>
  35 #include <linux/fb.h>
  36 #include <linux/init.h>
  37 #include <linux/vga_switcheroo.h>
  38
  39 #include "drmP.h"
  40 #include "drm.h"
  41 #include "drm_crtc.h"
  42 #include "drm_fb_helper.h"
  43 #include "intel_drv.h"
  44 #include "i915_drm.h"
  45 #include "i915_drv.h"
  46
  47 static struct fb_ops intelfb_ops = {
  48         .owner = THIS_MODULE,
  49         .fb_check_var = drm_fb_helper_check_var,
  50         .fb_set_par = drm_fb_helper_set_par,
  51         .fb_fillrect = cfb_fillrect,
  52         .fb_copyarea = cfb_copyarea,
  53         .fb_imageblit = cfb_imageblit,
  54         .fb_pan_display = drm_fb_helper_pan_display,
  55         .fb_blank = drm_fb_helper_blank,
  56         .fb_setcmap = drm_fb_helper_setcmap,
  57         .fb_debug_enter = drm_fb_helper_debug_enter,
  58         .fb_debug_leave = drm_fb_helper_debug_leave,
  59 };
  60
  61 static int intelfb_create(struct intel_fbdev *ifbdev,
  62                           struct drm_fb_helper_surface_size *sizes)
  63 {
  64         struct drm_device *dev = ifbdev->helper.dev;
  65         struct fb_info *info;
  66         struct drm_framebuffer *fb;
  67         struct drm_mode_fb_cmd mode_cmd;
  68         struct drm_gem_object *fbo = NULL;
  69         struct drm_i915_gem_object *obj_priv;
  70         struct device *device = &dev->pdev->dev;
  71         int size, ret, mmio_bar = IS_I9XX(dev) ? 0 : 1;
  72
  73         /* we don't do packed 24bpp */
  74         if (sizes->surface_bpp == 24)
  75                 sizes->surface_bpp = 32;
  76
  77         mode_cmd.width = sizes->surface_width;
  78         mode_cmd.height = sizes->surface_height;
  79
  80         mode_cmd.bpp = sizes->surface_bpp;
  81         mode_cmd.pitch = ALIGN(mode_cmd.width * ((mode_cmd.bpp + 1) / 8), 64);
  82         mode_cmd.depth = sizes->surface_depth;
  83
  84         size = mode_cmd.pitch * mode_cmd.height;
  85         size = ALIGN(size, PAGE_SIZE);
  86         fbo = i915_gem_alloc_object(dev, size);
  87         if (!fbo) {
  88                 DRM_ERROR("failed to allocate framebuffer\n");
  89                 ret = -ENOMEM;
  90                 goto out;
  91         }
  92         obj_priv = to_intel_bo(fbo);
  93
  94         mutex_lock(&dev->struct_mutex);
  95
  96         ret = intel_pin_and_fence_fb_obj(dev, fbo);
  97         if (ret) {
  98                 DRM_ERROR("failed to pin fb: %d\n", ret);
  99                 goto out_unref;
 100         }
 101
 102         /* Flush everything out, we'll be doing GTT only from now on */
 103         ret = i915_gem_object_set_to_gtt_domain(fbo, 1);
 104         if (ret) {
 105                 DRM_ERROR("failed to bind fb: %d.\n", ret);
 106                 goto out_unpin;
 107         }
 108
 109         info = framebuffer_alloc(0, device);
 110         if (!info) {
 111                 ret = -ENOMEM;
 112                 goto out_unpin;
 113         }
 114
 115         info->par = ifbdev;
 116
 117         ret = intel_framebuffer_init(dev, &ifbdev->ifb, &mode_cmd, fbo);
 118         if (ret)
 119                 goto out_unpin;
 120
 121         fb = &ifbdev->ifb.base;
 122
 123         ifbdev->helper.fb = fb;
 124         ifbdev->helper.fbdev = info;
 125
 126         strcpy(info->fix.id, "inteldrmfb");
 127
 128         info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
 129         info->fbops = &intelfb_ops;
 130
 131         /* setup aperture base/size for vesafb takeover */
 132         info->apertures = alloc_apertures(1);
 133         if (!info->apertures) {
 134                 ret = -ENOMEM;
 135                 goto out_unpin;
 136         }
 137         info->apertures->ranges[0].base = dev->mode_config.fb_base;
 138         if (IS_I9XX(dev))
 139                 info->apertures->ranges[0].size = pci_resource_len(dev->pdev, 2);
 140         else
 141                 info->apertures->ranges[0].size = pci_resource_len(dev->pdev, 0);
 142
 143         info->fix.smem_start = dev->mode_config.fb_base + obj_priv->gtt_offset;
 144         info->fix.smem_len = size;
 145
 146         info->screen_base = ioremap_wc(dev->agp->base + obj_priv->gtt_offset,
 147                                        size);
 148         if (!info->screen_base) {
 149                 ret = -ENOSPC;
 150                 goto out_unpin;
 151         }
 152
 153         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 154         if (ret) {
 155                 ret = -ENOMEM;
 156                 goto out_unpin;
 157         }
 158         info->screen_size = size;
 159
 160 //      memset(info->screen_base, 0, size);
 161
 162         drm_fb_helper_fill_fix(info, fb->pitch, fb->depth);
 163         drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
 164
 165         /* FIXME: we really shouldn't expose mmio space at all */
 166         info->fix.mmio_start = pci_resource_start(dev->pdev, mmio_bar);
 167         info->fix.mmio_len = pci_resource_len(dev->pdev, mmio_bar);
 168
 169         info->pixmap.size = 64*1024;
 170         info->pixmap.buf_align = 8;
 171         info->pixmap.access_align = 32;
 172         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 173         info->pixmap.scan_align = 1;
 174
 175         DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08x, bo %p\n",
 176                       fb->width, fb->height,
 177                       obj_priv->gtt_offset, fbo);
 178
 179
 180         mutex_unlock(&dev->struct_mutex);
 181         vga_switcheroo_client_fb_set(dev->pdev, info);
 182         return 0;
 183
 184 out_unpin:
 185         i915_gem_object_unpin(fbo);
 186 out_unref:
 187         drm_gem_object_unreference(fbo);
 188         mutex_unlock(&dev->struct_mutex);
 189 out:
 190         return ret;
 191 }
 192
 193 static int intel_fb_find_or_create_single(struct drm_fb_helper *helper,
 194                                           struct drm_fb_helper_surface_size *sizes)
 195 {
 196         struct intel_fbdev *ifbdev = (struct intel_fbdev *)helper;
 197         int new_fb = 0;
 198         int ret;
 199
 200         if (!helper->fb) {
 201                 ret = intelfb_create(ifbdev, sizes);
 202                 if (ret)
 203                         return ret;
 204                 new_fb = 1;
 205         }
 206         return new_fb;
 207 }
 208
 209 static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
 210         .gamma_set = intel_crtc_fb_gamma_set,
 211         .gamma_get = intel_crtc_fb_gamma_get,
 212         .fb_probe = intel_fb_find_or_create_single,
 213 };
 214
 215 static int intel_fbdev_destroy(struct drm_device *dev,
 216                                struct intel_fbdev *ifbdev)
 217 {
 218         struct fb_info *info;
 219         struct intel_framebuffer *ifb = &ifbdev->ifb;
 220
 221         if (ifbdev->helper.fbdev) {
 222                 info = ifbdev->helper.fbdev;
 223                 unregister_framebuffer(info);
 224                 iounmap(info->screen_base);
 225                 if (info->cmap.len)
 226                         fb_dealloc_cmap(&info->cmap);
 227                 framebuffer_release(info);
 228         }
 229
 230         drm_fb_helper_fini(&ifbdev->helper);
 231
 232         drm_framebuffer_cleanup(&ifb->base);
 233         if (ifb->obj)
 234                 drm_gem_object_unreference(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         int ret;
 244
 245         ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
 246         if (!ifbdev)
 247                 return -ENOMEM;
 248
 249         dev_priv->fbdev = ifbdev;
 250         ifbdev->helper.funcs = &intel_fb_helper_funcs;
 251
 252         ret = drm_fb_helper_init(dev, &ifbdev->helper,
 253                                  dev_priv->num_pipe,
 254                                  INTELFB_CONN_LIMIT);
 255         if (ret) {
 256                 kfree(ifbdev);
 257                 return ret;
 258         }
 259
 260         drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
 261         drm_fb_helper_initial_config(&ifbdev->helper, 32);
 262         return 0;
 263 }
 264
 265 void intel_fbdev_fini(struct drm_device *dev)
 266 {
 267         drm_i915_private_t *dev_priv = dev->dev_private;
 268         if (!dev_priv->fbdev)
 269                 return;
 270
 271         intel_fbdev_destroy(dev, dev_priv->fbdev);
 272         kfree(dev_priv->fbdev);
 273         dev_priv->fbdev = NULL;
 274 }
 275 MODULE_LICENSE("GPL and additional rights");
 276
 277 void intel_fb_output_poll_changed(struct drm_device *dev)
 278 {
 279         drm_i915_private_t *dev_priv = dev->dev_private;
 280         drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
 281 }