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
 47static 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
 61static 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 drm_i915_private *dev_priv = dev->dev_private;
 66	struct fb_info *info;
 67	struct drm_framebuffer *fb;
 68	struct drm_mode_fb_cmd mode_cmd;
 69	struct drm_i915_gem_object *obj;
 70	struct device *device = &dev->pdev->dev;
 71	int size, ret;
 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 + 7) / 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	obj = i915_gem_alloc_object(dev, size);
 87	if (!obj) {
 88		DRM_ERROR("failed to allocate framebuffer\n");
 89		ret = -ENOMEM;
 90		goto out;
 91	}
 92
 93	mutex_lock(&dev->struct_mutex);
 94
 95	/* Flush everything out, we'll be doing GTT only from now on */
 96	ret = intel_pin_and_fence_fb_obj(dev, obj, false);
 97	if (ret) {
 98		DRM_ERROR("failed to pin fb: %d\n", ret);
 99		goto out_unref;
100	}
101
102	info = framebuffer_alloc(0, device);
103	if (!info) {
104		ret = -ENOMEM;
105		goto out_unpin;
106	}
107
108	info->par = ifbdev;
109
110	ret = intel_framebuffer_init(dev, &ifbdev->ifb, &mode_cmd, obj);
111	if (ret)
112		goto out_unpin;
113
114	fb = &ifbdev->ifb.base;
115
116	ifbdev->helper.fb = fb;
117	ifbdev->helper.fbdev = info;
118
119	strcpy(info->fix.id, "inteldrmfb");
120
121	info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
122	info->fbops = &intelfb_ops;
123
124	ret = fb_alloc_cmap(&info->cmap, 256, 0);
125	if (ret) {
126		ret = -ENOMEM;
127		goto out_unpin;
128	}
129	/* setup aperture base/size for vesafb takeover */
130	info->apertures = alloc_apertures(1);
131	if (!info->apertures) {
132		ret = -ENOMEM;
133		goto out_unpin;
134	}
135	info->apertures->ranges[0].base = dev->mode_config.fb_base;
136	info->apertures->ranges[0].size =
137		dev_priv->mm.gtt->gtt_mappable_entries << PAGE_SHIFT;
138
139	info->fix.smem_start = dev->mode_config.fb_base + obj->gtt_offset;
140	info->fix.smem_len = size;
141
142	info->screen_base = ioremap_wc(dev->agp->base + obj->gtt_offset, size);
143	if (!info->screen_base) {
144		ret = -ENOSPC;
145		goto out_unpin;
146	}
147	info->screen_size = size;
148
149//	memset(info->screen_base, 0, size);
150
151	drm_fb_helper_fill_fix(info, fb->pitch, fb->depth);
152	drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
153
154	info->pixmap.size = 64*1024;
155	info->pixmap.buf_align = 8;
156	info->pixmap.access_align = 32;
157	info->pixmap.flags = FB_PIXMAP_SYSTEM;
158	info->pixmap.scan_align = 1;
159
160	DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08x, bo %p\n",
161		      fb->width, fb->height,
162		      obj->gtt_offset, obj);
163
164
165	mutex_unlock(&dev->struct_mutex);
166	vga_switcheroo_client_fb_set(dev->pdev, info);
167	return 0;
168
169out_unpin:
170	i915_gem_object_unpin(obj);
171out_unref:
172	drm_gem_object_unreference(&obj->base);
173	mutex_unlock(&dev->struct_mutex);
174out:
175	return ret;
176}
177
178static int intel_fb_find_or_create_single(struct drm_fb_helper *helper,
179					  struct drm_fb_helper_surface_size *sizes)
180{
181	struct intel_fbdev *ifbdev = (struct intel_fbdev *)helper;
182	int new_fb = 0;
183	int ret;
184
185	if (!helper->fb) {
186		ret = intelfb_create(ifbdev, sizes);
187		if (ret)
188			return ret;
189		new_fb = 1;
190	}
191	return new_fb;
192}
193
194static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
195	.gamma_set = intel_crtc_fb_gamma_set,
196	.gamma_get = intel_crtc_fb_gamma_get,
197	.fb_probe = intel_fb_find_or_create_single,
198};
199
200static void intel_fbdev_destroy(struct drm_device *dev,
201				struct intel_fbdev *ifbdev)
202{
203	struct fb_info *info;
204	struct intel_framebuffer *ifb = &ifbdev->ifb;
205
206	if (ifbdev->helper.fbdev) {
207		info = ifbdev->helper.fbdev;
208		unregister_framebuffer(info);
209		iounmap(info->screen_base);
210		if (info->cmap.len)
211			fb_dealloc_cmap(&info->cmap);
212		framebuffer_release(info);
213	}
214
215	drm_fb_helper_fini(&ifbdev->helper);
216
217	drm_framebuffer_cleanup(&ifb->base);
218	if (ifb->obj) {
219		drm_gem_object_unreference_unlocked(&ifb->obj->base);
220		ifb->obj = NULL;
221	}
222}
223
224int intel_fbdev_init(struct drm_device *dev)
225{
226	struct intel_fbdev *ifbdev;
227	drm_i915_private_t *dev_priv = dev->dev_private;
228	int ret;
229
230	ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
231	if (!ifbdev)
232		return -ENOMEM;
233
234	dev_priv->fbdev = ifbdev;
235	ifbdev->helper.funcs = &intel_fb_helper_funcs;
236
237	ret = drm_fb_helper_init(dev, &ifbdev->helper,
238				 dev_priv->num_pipe,
239				 INTELFB_CONN_LIMIT);
240	if (ret) {
241		kfree(ifbdev);
242		return ret;
243	}
244
245	drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
246	drm_fb_helper_initial_config(&ifbdev->helper, 32);
247	return 0;
248}
249
250void intel_fbdev_fini(struct drm_device *dev)
251{
252	drm_i915_private_t *dev_priv = dev->dev_private;
253	if (!dev_priv->fbdev)
254		return;
255
256	intel_fbdev_destroy(dev, dev_priv->fbdev);
257	kfree(dev_priv->fbdev);
258	dev_priv->fbdev = NULL;
259}
260MODULE_LICENSE("GPL and additional rights");
261
262void intel_fb_output_poll_changed(struct drm_device *dev)
263{
264	drm_i915_private_t *dev_priv = dev->dev_private;
265	drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
266}
267
268void intel_fb_restore_mode(struct drm_device *dev)
269{
270	int ret;
271	drm_i915_private_t *dev_priv = dev->dev_private;
272
273	ret = drm_fb_helper_restore_fbdev_mode(&dev_priv->fbdev->helper);
274	if (ret)
275		DRM_DEBUG("failed to restore crtc mode\n");
276}