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
  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 intelfb_par {
  48         struct drm_fb_helper helper;
  49         struct intel_framebuffer *intel_fb;
  50         struct drm_display_mode *our_mode;
  51 };
  52
  53 static struct fb_ops intelfb_ops = {
  54         .owner = THIS_MODULE,
  55         .fb_check_var = drm_fb_helper_check_var,
  56         .fb_set_par = drm_fb_helper_set_par,
  57         .fb_setcolreg = drm_fb_helper_setcolreg,
  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 };
  64
  65 static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
  66         .gamma_set = intel_crtc_fb_gamma_set,
  67 };
  68
  69
  70 /**
  71  * Curretly it is assumed that the old framebuffer is reused.
  72  *
  73  * LOCKING
  74  * caller should hold the mode config lock.
  75  *
  76  */
  77 int intelfb_resize(struct drm_device *dev, struct drm_crtc *crtc)
  78 {
  79         struct fb_info *info;
  80         struct drm_framebuffer *fb;
  81         struct drm_display_mode *mode = crtc->desired_mode;
  82
  83         fb = crtc->fb;
  84         if (!fb)
  85                 return 1;
  86
  87         info = fb->fbdev;
  88         if (!info)
  89                 return 1;
  90
  91         if (!mode)
  92                 return 1;
  93
  94         info->var.xres = mode->hdisplay;
  95         info->var.right_margin = mode->hsync_start - mode->hdisplay;
  96         info->var.hsync_len = mode->hsync_end - mode->hsync_start;
  97         info->var.left_margin = mode->htotal - mode->hsync_end;
  98         info->var.yres = mode->vdisplay;
  99         info->var.lower_margin = mode->vsync_start - mode->vdisplay;
 100         info->var.vsync_len = mode->vsync_end - mode->vsync_start;
 101         info->var.upper_margin = mode->vtotal - mode->vsync_end;
 102         info->var.pixclock = 10000000 / mode->htotal * 1000 / mode->vtotal * 100;
 103         /* avoid overflow */
 104         info->var.pixclock = info->var.pixclock * 1000 / mode->vrefresh;
 105
 106         return 0;
 107 }
 108 EXPORT_SYMBOL(intelfb_resize);
 109
 110 static int intelfb_create(struct drm_device *dev, uint32_t fb_width,
 111                           uint32_t fb_height, uint32_t surface_width,
 112                           uint32_t surface_height,
 113                           struct drm_framebuffer **fb_p)
 114 {
 115         struct fb_info *info;
 116         struct intelfb_par *par;
 117         struct drm_framebuffer *fb;
 118         struct intel_framebuffer *intel_fb;
 119         struct drm_mode_fb_cmd mode_cmd;
 120         struct drm_gem_object *fbo = NULL;
 121         struct drm_i915_gem_object *obj_priv;
 122         struct device *device = &dev->pdev->dev;
 123         int size, ret, mmio_bar = IS_I9XX(dev) ? 0 : 1;
 124
 125         mode_cmd.width = surface_width;
 126         mode_cmd.height = surface_height;
 127
 128         mode_cmd.bpp = 32;
 129         mode_cmd.pitch = ALIGN(mode_cmd.width * ((mode_cmd.bpp + 1) / 8), 64);
 130         mode_cmd.depth = 24;
 131
 132         size = mode_cmd.pitch * mode_cmd.height;
 133         size = ALIGN(size, PAGE_SIZE);
 134         fbo = drm_gem_object_alloc(dev, size);
 135         if (!fbo) {
 136                 DRM_ERROR("failed to allocate framebuffer\n");
 137                 ret = -ENOMEM;
 138                 goto out;
 139         }
 140         obj_priv = fbo->driver_private;
 141
 142         mutex_lock(&dev->struct_mutex);
 143
 144         ret = i915_gem_object_pin(fbo, PAGE_SIZE);
 145         if (ret) {
 146                 DRM_ERROR("failed to pin fb: %d\n", ret);
 147                 goto out_unref;
 148         }
 149
 150         /* Flush everything out, we'll be doing GTT only from now on */
 151         i915_gem_object_set_to_gtt_domain(fbo, 1);
 152
 153         ret = intel_framebuffer_create(dev, &mode_cmd, &fb, fbo);
 154         if (ret) {
 155                 DRM_ERROR("failed to allocate fb.\n");
 156                 goto out_unpin;
 157         }
 158
 159         list_add(&fb->filp_head, &dev->mode_config.fb_kernel_list);
 160
 161         intel_fb = to_intel_framebuffer(fb);
 162         *fb_p = fb;
 163
 164         info = framebuffer_alloc(sizeof(struct intelfb_par), device);
 165         if (!info) {
 166                 ret = -ENOMEM;
 167                 goto out_unpin;
 168         }
 169
 170         par = info->par;
 171
 172         par->helper.funcs = &intel_fb_helper_funcs;
 173         par->helper.dev = dev;
 174         ret = drm_fb_helper_init_crtc_count(&par->helper, 2,
 175                                             INTELFB_CONN_LIMIT);
 176         if (ret)
 177                 goto out_unref;
 178
 179         strcpy(info->fix.id, "inteldrmfb");
 180
 181         info->flags = FBINFO_DEFAULT;
 182
 183         info->fbops = &intelfb_ops;
 184
 185
 186         /* setup aperture base/size for vesafb takeover */
 187         info->aperture_base = dev->mode_config.fb_base;
 188         if (IS_I9XX(dev))
 189                 info->aperture_size = pci_resource_len(dev->pdev, 2);
 190         else
 191                 info->aperture_size = pci_resource_len(dev->pdev, 0);
 192
 193         info->fix.smem_start = dev->mode_config.fb_base + obj_priv->gtt_offset;
 194         info->fix.smem_len = size;
 195
 196         info->flags = FBINFO_DEFAULT;
 197
 198         info->screen_base = ioremap_wc(dev->agp->base + obj_priv->gtt_offset,
 199                                        size);
 200         if (!info->screen_base) {
 201                 ret = -ENOSPC;
 202                 goto out_unpin;
 203         }
 204         info->screen_size = size;
 205
 206 //      memset(info->screen_base, 0, size);
 207
 208         drm_fb_helper_fill_fix(info, fb->depth);
 209         drm_fb_helper_fill_var(info, fb, fb_width, fb_height);
 210
 211         /* FIXME: we really shouldn't expose mmio space at all */
 212         info->fix.mmio_start = pci_resource_start(dev->pdev, mmio_bar);
 213         info->fix.mmio_len = pci_resource_len(dev->pdev, mmio_bar);
 214
 215         info->pixmap.size = 64*1024;
 216         info->pixmap.buf_align = 8;
 217         info->pixmap.access_align = 32;
 218         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 219         info->pixmap.scan_align = 1;
 220
 221         fb->fbdev = info;
 222
 223         par->intel_fb = intel_fb;
 224
 225         /* To allow resizeing without swapping buffers */
 226         DRM_DEBUG("allocated %dx%d fb: 0x%08x, bo %p\n", intel_fb->base.width,
 227                   intel_fb->base.height, obj_priv->gtt_offset, fbo);
 228
 229         mutex_unlock(&dev->struct_mutex);
 230         return 0;
 231
 232 out_unpin:
 233         i915_gem_object_unpin(fbo);
 234 out_unref:
 235         drm_gem_object_unreference(fbo);
 236         mutex_unlock(&dev->struct_mutex);
 237 out:
 238         return ret;
 239 }
 240
 241 int intelfb_probe(struct drm_device *dev)
 242 {
 243         int ret;
 244
 245         DRM_DEBUG("\n");
 246         ret = drm_fb_helper_single_fb_probe(dev, intelfb_create);
 247         return ret;
 248 }
 249 EXPORT_SYMBOL(intelfb_probe);
 250
 251 int intelfb_remove(struct drm_device *dev, struct drm_framebuffer *fb)
 252 {
 253         struct fb_info *info;
 254
 255         if (!fb)
 256                 return -EINVAL;
 257
 258         info = fb->fbdev;
 259
 260         if (info) {
 261                 struct intelfb_par *par = info->par;
 262                 unregister_framebuffer(info);
 263                 iounmap(info->screen_base);
 264                 if (info->par)
 265                         drm_fb_helper_free(&par->helper);
 266                 framebuffer_release(info);
 267         }
 268
 269         return 0;
 270 }
 271 EXPORT_SYMBOL(intelfb_remove);
 272 MODULE_LICENSE("GPL and additional rights");