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 struct intel_fbdev {
  48         struct drm_fb_helper helper;
  49         struct intel_framebuffer ifb;
  50         struct list_head fbdev_list;
  51         struct drm_display_mode *our_mode;
  52 };
  53
  54 static struct fb_ops intelfb_ops = {
  55         .owner = THIS_MODULE,
  56         .fb_check_var = drm_fb_helper_check_var,
  57         .fb_set_par = drm_fb_helper_set_par,
  58         .fb_fillrect = cfb_fillrect,
  59         .fb_copyarea = cfb_copyarea,
  60         .fb_imageblit = cfb_imageblit,
  61         .fb_pan_display = drm_fb_helper_pan_display,
  62         .fb_blank = drm_fb_helper_blank,
  63         .fb_setcmap = drm_fb_helper_setcmap,
  64 };
  65
  66 static int intelfb_create(struct intel_fbdev *ifbdev,
  67                           struct drm_fb_helper_surface_size *sizes)
  68 {
  69         struct drm_device *dev = ifbdev->helper.dev;
  70         struct fb_info *info;
  71         struct drm_framebuffer *fb;
  72         struct drm_mode_fb_cmd mode_cmd;
  73         struct drm_gem_object *fbo = NULL;
  74         struct drm_i915_gem_object *obj_priv;
  75         struct device *device = &dev->pdev->dev;
  76         int size, ret, mmio_bar = IS_I9XX(dev) ? 0 : 1;
  77
  78         /* we don't do packed 24bpp */
  79         if (sizes->surface_bpp == 24)
  80                 sizes->surface_bpp = 32;
  81
  82         mode_cmd.width = sizes->surface_width;
  83         mode_cmd.height = sizes->surface_height;
  84
  85         mode_cmd.bpp = sizes->surface_bpp;
  86         mode_cmd.pitch = ALIGN(mode_cmd.width * ((mode_cmd.bpp + 1) / 8), 64);
  87         mode_cmd.depth = sizes->surface_depth;
  88
  89         size = mode_cmd.pitch * mode_cmd.height;
  90         size = ALIGN(size, PAGE_SIZE);
  91         fbo = i915_gem_alloc_object(dev, size);
  92         if (!fbo) {
  93                 DRM_ERROR("failed to allocate framebuffer\n");
  94                 ret = -ENOMEM;
  95                 goto out;
  96         }
  97         obj_priv = to_intel_bo(fbo);
  98
  99         mutex_lock(&dev->struct_mutex);
 100
 101         ret = i915_gem_object_pin(fbo, 64*1024);
 102         if (ret) {
 103                 DRM_ERROR("failed to pin fb: %d\n", ret);
 104                 goto out_unref;
 105         }
 106
 107         /* Flush everything out, we'll be doing GTT only from now on */
 108         i915_gem_object_set_to_gtt_domain(fbo, 1);
 109
 110         info = framebuffer_alloc(0, device);
 111         if (!info) {
 112                 ret = -ENOMEM;
 113                 goto out_unpin;
 114         }
 115
 116         info->par = ifbdev;
 117
 118         intel_framebuffer_init(dev, &ifbdev->ifb, &mode_cmd, fbo);
 119
 120         fb = &ifbdev->ifb.base;
 121
 122         ifbdev->helper.fb = fb;
 123         ifbdev->helper.fbdev = info;
 124
 125         strcpy(info->fix.id, "inteldrmfb");
 126
 127         info->flags = FBINFO_DEFAULT;
 128         info->fbops = &intelfb_ops;
 129
 130         /* setup aperture base/size for vesafb takeover */
 131         info->aperture_base = dev->mode_config.fb_base;
 132         if (IS_I9XX(dev))
 133                 info->aperture_size = pci_resource_len(dev->pdev, 2);
 134         else
 135                 info->aperture_size = pci_resource_len(dev->pdev, 0);
 136
 137         info->fix.smem_start = dev->mode_config.fb_base + obj_priv->gtt_offset;
 138         info->fix.smem_len = size;
 139
 140         info->flags = FBINFO_DEFAULT;
 141
 142         info->screen_base = ioremap_wc(dev->agp->base + obj_priv->gtt_offset,
 143                                        size);
 144         if (!info->screen_base) {
 145                 ret = -ENOSPC;
 146                 goto out_unpin;
 147         }
 148
 149         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 150         if (ret) {
 151                 ret = -ENOMEM;
 152                 goto out_unpin;
 153         }
 154         info->screen_size = size;
 155
 156 //      memset(info->screen_base, 0, size);
 157
 158         drm_fb_helper_fill_fix(info, fb->pitch, fb->depth);
 159         drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
 160
 161         /* FIXME: we really shouldn't expose mmio space at all */
 162         info->fix.mmio_start = pci_resource_start(dev->pdev, mmio_bar);
 163         info->fix.mmio_len = pci_resource_len(dev->pdev, mmio_bar);
 164
 165         info->pixmap.size = 64*1024;
 166         info->pixmap.buf_align = 8;
 167         info->pixmap.access_align = 32;
 168         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 169         info->pixmap.scan_align = 1;
 170
 171         DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08x, bo %p\n",
 172                       fb->width, fb->height,
 173                       obj_priv->gtt_offset, fbo);
 174
 175
 176         mutex_unlock(&dev->struct_mutex);
 177         vga_switcheroo_client_fb_set(dev->pdev, info);
 178         return 0;
 179
 180 out_unpin:
 181         i915_gem_object_unpin(fbo);
 182 out_unref:
 183         drm_gem_object_unreference(fbo);
 184         mutex_unlock(&dev->struct_mutex);
 185 out:
 186         return ret;
 187 }
 188
 189 static int intel_fb_find_or_create_single(struct drm_fb_helper *helper,
 190                                           struct drm_fb_helper_surface_size *sizes)
 191 {
 192         struct intel_fbdev *ifbdev = (struct intel_fbdev *)helper;
 193         int new_fb = 0;
 194         int ret;
 195
 196         if (!helper->fb) {
 197                 ret = intelfb_create(ifbdev, sizes);
 198                 if (ret)
 199                         return ret;
 200                 new_fb = 1;
 201         }
 202         return new_fb;
 203 }
 204
 205 void intelfb_hotplug(struct drm_device *dev, bool polled)
 206 {
 207         drm_i915_private_t *dev_priv = dev->dev_private;
 208         drm_helper_fb_hpd_irq_event(&dev_priv->fbdev->helper);
 209 }
 210
 211 static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
 212         .gamma_set = intel_crtc_fb_gamma_set,
 213         .gamma_get = intel_crtc_fb_gamma_get,
 214         .fb_probe = intel_fb_find_or_create_single,
 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                 if (info->cmap.len)
 228                         fb_dealloc_cmap(&info->cmap);
 229                 framebuffer_release(info);
 230         }
 231
 232         drm_fb_helper_fini(&ifbdev->helper);
 233
 234         drm_framebuffer_cleanup(&ifb->base);
 235         if (ifb->obj)
 236                 drm_gem_object_unreference_unlocked(ifb->obj);
 237
 238         return 0;
 239 }
 240
 241 int intel_fbdev_init(struct drm_device *dev)
 242 {
 243         struct intel_fbdev *ifbdev;
 244         drm_i915_private_t *dev_priv = dev->dev_private;
 245
 246         ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
 247         if (!ifbdev)
 248                 return -ENOMEM;
 249
 250         dev_priv->fbdev = ifbdev;
 251         ifbdev->helper.funcs = &intel_fb_helper_funcs;
 252
 253         drm_fb_helper_init(dev, &ifbdev->helper, 2,
 254                            INTELFB_CONN_LIMIT, false);
 255
 256         drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
 257         drm_fb_helper_initial_config(&ifbdev->helper, 32);
 258         return 0;
 259 }
 260
 261 void intel_fbdev_fini(struct drm_device *dev)
 262 {
 263         drm_i915_private_t *dev_priv = dev->dev_private;
 264         if (!dev_priv->fbdev)
 265                 return;
 266
 267         intel_fbdev_destroy(dev, dev_priv->fbdev);
 268         kfree(dev_priv->fbdev);
 269         dev_priv->fbdev = NULL;
 270 }
 271 MODULE_LICENSE("GPL and additional rights");