[deliverable/linux.git] / drivers / gpu / drm / mgag200 / mgag200_fb.c

/*
 * Copyright 2010 Matt Turner.
 * Copyright 2012 Red Hat
 *
 * This file is subject to the terms and conditions of the GNU General
 * Public License version 2. See the file COPYING in the main
 * directory of this archive for more details.
 *
 * Authors: Matthew Garrett
 *          Matt Turner
 *          Dave Airlie
 */
#include <linux/module.h>
#include <drm/drmP.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_crtc_helper.h>

#include <linux/fb.h>

#include "mgag200_drv.h"

static void mga_dirty_update(struct mga_fbdev *mfbdev,
			     int x, int y, int width, int height)
{
	int i;
	struct drm_gem_object *obj;
	struct mgag200_bo *bo;
	int src_offset, dst_offset;
	int bpp = (mfbdev->mfb.base.bits_per_pixel + 7)/8;
	int ret;
	bool unmap = false;

	obj = mfbdev->mfb.obj;
	bo = gem_to_mga_bo(obj);

	ret = mgag200_bo_reserve(bo, true);
	if (ret) {
		DRM_ERROR("failed to reserve fb bo\n");
		return;
	}

	if (!bo->kmap.virtual) {
		ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
		if (ret) {
			DRM_ERROR("failed to kmap fb updates\n");
			mgag200_bo_unreserve(bo);
			return;
		}
		unmap = true;
	}
	for (i = y; i < y + height; i++) {
		/* assume equal stride for now */
		src_offset = dst_offset = i * mfbdev->mfb.base.pitches[0] + (x * bpp);
		memcpy_toio(bo->kmap.virtual + src_offset, mfbdev->sysram + src_offset, width * bpp);

	}
	if (unmap)
		ttm_bo_kunmap(&bo->kmap);

	mgag200_bo_unreserve(bo);
}

static void mga_fillrect(struct fb_info *info,
			 const struct fb_fillrect *rect)
{
	struct mga_fbdev *mfbdev = info->par;
	sys_fillrect(info, rect);
	mga_dirty_update(mfbdev, rect->dx, rect->dy, rect->width,
			 rect->height);
}

static void mga_copyarea(struct fb_info *info,
			 const struct fb_copyarea *area)
{
	struct mga_fbdev *mfbdev = info->par;
	sys_copyarea(info, area);
	mga_dirty_update(mfbdev, area->dx, area->dy, area->width,
			 area->height);
}

static void mga_imageblit(struct fb_info *info,
			  const struct fb_image *image)
{
	struct mga_fbdev *mfbdev = info->par;
	sys_imageblit(info, image);
	mga_dirty_update(mfbdev, image->dx, image->dy, image->width,
			 image->height);
}


static struct fb_ops mgag200fb_ops = {
	.owner = THIS_MODULE,
	.fb_check_var = drm_fb_helper_check_var,
	.fb_set_par = drm_fb_helper_set_par,
	.fb_fillrect = mga_fillrect,
	.fb_copyarea = mga_copyarea,
	.fb_imageblit = mga_imageblit,
	.fb_pan_display = drm_fb_helper_pan_display,
	.fb_blank = drm_fb_helper_blank,
	.fb_setcmap = drm_fb_helper_setcmap,
};

static int mgag200fb_create_object(struct mga_fbdev *afbdev,
				   struct drm_mode_fb_cmd2 *mode_cmd,
				   struct drm_gem_object **gobj_p)
{
	struct drm_device *dev = afbdev->helper.dev;
	u32 bpp, depth;
	u32 size;
	struct drm_gem_object *gobj;

	int ret = 0;
	drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);

	size = mode_cmd->pitches[0] * mode_cmd->height;
	ret = mgag200_gem_create(dev, size, true, &gobj);
	if (ret)
		return ret;

	*gobj_p = gobj;
	return ret;
}

static int mgag200fb_create(struct mga_fbdev *mfbdev,
			   struct drm_fb_helper_surface_size *sizes)
{
	struct drm_device *dev = mfbdev->helper.dev;
	struct drm_mode_fb_cmd2 mode_cmd;
	struct mga_device *mdev = dev->dev_private;
	struct fb_info *info;
	struct drm_framebuffer *fb;
	struct drm_gem_object *gobj = NULL;
	struct device *device = &dev->pdev->dev;
	struct mgag200_bo *bo;
	int ret;
	void *sysram;
	int size;

	mode_cmd.width = sizes->surface_width;
	mode_cmd.height = sizes->surface_height;
	mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7) / 8);

	mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
							  sizes->surface_depth);
	size = mode_cmd.pitches[0] * mode_cmd.height;

	ret = mgag200fb_create_object(mfbdev, &mode_cmd, &gobj);
	if (ret) {
		DRM_ERROR("failed to create fbcon backing object %d\n", ret);
		return ret;
	}
	bo = gem_to_mga_bo(gobj);

	sysram = vmalloc(size);
	if (!sysram)
		return -ENOMEM;

	info = framebuffer_alloc(0, device);
	if (info == NULL)
		return -ENOMEM;

	info->par = mfbdev;

	ret = mgag200_framebuffer_init(dev, &mfbdev->mfb, &mode_cmd, gobj);
	if (ret)
		return ret;

	mfbdev->sysram = sysram;
	mfbdev->size = size;

	fb = &mfbdev->mfb.base;

	/* setup helper */
	mfbdev->helper.fb = fb;
	mfbdev->helper.fbdev = info;

	ret = fb_alloc_cmap(&info->cmap, 256, 0);
	if (ret) {
		DRM_ERROR("%s: can't allocate color map\n", info->fix.id);
		ret = -ENOMEM;
		goto out;
	}

	strcpy(info->fix.id, "mgadrmfb");

	info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
	info->fbops = &mgag200fb_ops;

	/* setup aperture base/size for vesafb takeover */
	info->apertures = alloc_apertures(1);
	if (!info->apertures) {
		ret = -ENOMEM;
		goto out;
	}
	info->apertures->ranges[0].base = mdev->dev->mode_config.fb_base;
	info->apertures->ranges[0].size = mdev->mc.vram_size;

	drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
	drm_fb_helper_fill_var(info, &mfbdev->helper, sizes->fb_width,
			       sizes->fb_height);

	info->screen_base = sysram;
	info->screen_size = size;
	info->pixmap.flags = FB_PIXMAP_SYSTEM;

	DRM_DEBUG_KMS("allocated %dx%d\n",
		      fb->width, fb->height);
	return 0;
out:
	return ret;
}

static int mga_fb_find_or_create_single(struct drm_fb_helper *helper,
					   struct drm_fb_helper_surface_size
					   *sizes)
{
	struct mga_fbdev *mfbdev = (struct mga_fbdev *)helper;
	int new_fb = 0;
	int ret;

	if (!helper->fb) {
		ret = mgag200fb_create(mfbdev, sizes);
		if (ret)
			return ret;
		new_fb = 1;
	}
	return new_fb;
}

static int mga_fbdev_destroy(struct drm_device *dev,
				struct mga_fbdev *mfbdev)
{
	struct fb_info *info;
	struct mga_framebuffer *mfb = &mfbdev->mfb;

	if (mfbdev->helper.fbdev) {
		info = mfbdev->helper.fbdev;

		unregister_framebuffer(info);
		if (info->cmap.len)
			fb_dealloc_cmap(&info->cmap);
		framebuffer_release(info);
	}

	if (mfb->obj) {
		drm_gem_object_unreference_unlocked(mfb->obj);
		mfb->obj = NULL;
	}
	drm_fb_helper_fini(&mfbdev->helper);
	vfree(mfbdev->sysram);
	drm_framebuffer_unregister_private(&mfb->base);
	drm_framebuffer_cleanup(&mfb->base);

	return 0;
}

static struct drm_fb_helper_funcs mga_fb_helper_funcs = {
	.gamma_set = mga_crtc_fb_gamma_set,
	.gamma_get = mga_crtc_fb_gamma_get,
	.fb_probe = mga_fb_find_or_create_single,
};

int mgag200_fbdev_init(struct mga_device *mdev)
{
	struct mga_fbdev *mfbdev;
	int ret;

	mfbdev = kzalloc(sizeof(struct mga_fbdev), GFP_KERNEL);
	if (!mfbdev)
		return -ENOMEM;

	mdev->mfbdev = mfbdev;
	mfbdev->helper.funcs = &mga_fb_helper_funcs;

	ret = drm_fb_helper_init(mdev->dev, &mfbdev->helper,
				 mdev->num_crtc, MGAG200FB_CONN_LIMIT);
	if (ret) {
		kfree(mfbdev);
		return ret;
	}
	drm_fb_helper_single_add_all_connectors(&mfbdev->helper);

	/* disable all the possible outputs/crtcs before entering KMS mode */
	drm_helper_disable_unused_functions(mdev->dev);

	drm_fb_helper_initial_config(&mfbdev->helper, 32);

	return 0;
}

void mgag200_fbdev_fini(struct mga_device *mdev)
{
	if (!mdev->mfbdev)
		return;

	mga_fbdev_destroy(mdev->dev, mdev->mfbdev);
	kfree(mdev->mfbdev);
	mdev->mfbdev = NULL;
}
Commit	Line	Data
414c4531 DA	1	/*
	2	* Copyright 2010 Matt Turner.
	3	* Copyright 2012 Red Hat
	4	*
	5	* This file is subject to the terms and conditions of the GNU General
	6	* Public License version 2. See the file COPYING in the main
	7	* directory of this archive for more details.
	8	*
	9	* Authors: Matthew Garrett
	10	* Matt Turner
	11	* Dave Airlie
	12	*/
	13	#include <linux/module.h>
760285e7 DH	14	#include <drm/drmP.h>
760285e7 DH	15	#include <drm/drm_fb_helper.h>
76a39dbf	16	#include <drm/drm_crtc_helper.h>
414c4531 DA	17
	18	#include <linux/fb.h>
	19
	20	#include "mgag200_drv.h"
	21
	22	static void mga_dirty_update(struct mga_fbdev *mfbdev,
	23	int x, int y, int width, int height)
	24	{
	25	int i;
	26	struct drm_gem_object *obj;
	27	struct mgag200_bo *bo;
	28	int src_offset, dst_offset;
	29	int bpp = (mfbdev->mfb.base.bits_per_pixel + 7)/8;
	30	int ret;
	31	bool unmap = false;
	32
	33	obj = mfbdev->mfb.obj;
	34	bo = gem_to_mga_bo(obj);
	35
	36	ret = mgag200_bo_reserve(bo, true);
	37	if (ret) {
	38	DRM_ERROR("failed to reserve fb bo\n");
	39	return;
	40	}
	41
	42	if (!bo->kmap.virtual) {
	43	ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
	44	if (ret) {
	45	DRM_ERROR("failed to kmap fb updates\n");
	46	mgag200_bo_unreserve(bo);
	47	return;
	48	}
	49	unmap = true;
	50	}
	51	for (i = y; i < y + height; i++) {
	52	/* assume equal stride for now */
	53	src_offset = dst_offset = i * mfbdev->mfb.base.pitches[0] + (x * bpp);
	54	memcpy_toio(bo->kmap.virtual + src_offset, mfbdev->sysram + src_offset, width * bpp);
	55
	56	}
	57	if (unmap)
	58	ttm_bo_kunmap(&bo->kmap);
	59
	60	mgag200_bo_unreserve(bo);
	61	}
	62
	63	static void mga_fillrect(struct fb_info *info,
	64	const struct fb_fillrect *rect)
	65	{
	66	struct mga_fbdev *mfbdev = info->par;
	67	sys_fillrect(info, rect);
	68	mga_dirty_update(mfbdev, rect->dx, rect->dy, rect->width,
	69	rect->height);
	70	}
	71
	72	static void mga_copyarea(struct fb_info *info,
	73	const struct fb_copyarea *area)
	74	{
	75	struct mga_fbdev *mfbdev = info->par;
	76	sys_copyarea(info, area);
	77	mga_dirty_update(mfbdev, area->dx, area->dy, area->width,
	78	area->height);
	79	}
	80
81	static void mga_imageblit(struct fb_info *info,
82	const struct fb_image *image)
83	{
84	struct mga_fbdev *mfbdev = info->par;
85	sys_imageblit(info, image);
86	mga_dirty_update(mfbdev, image->dx, image->dy, image->width,
87	image->height);
88	}
89
90
91	static struct fb_ops mgag200fb_ops = {
92	.owner = THIS_MODULE,
93	.fb_check_var = drm_fb_helper_check_var,
94	.fb_set_par = drm_fb_helper_set_par,
95	.fb_fillrect = mga_fillrect,
96	.fb_copyarea = mga_copyarea,
97	.fb_imageblit = mga_imageblit,
98	.fb_pan_display = drm_fb_helper_pan_display,
99	.fb_blank = drm_fb_helper_blank,
100	.fb_setcmap = drm_fb_helper_setcmap,
101	};
102
103	static int mgag200fb_create_object(struct mga_fbdev *afbdev,
104	struct drm_mode_fb_cmd2 *mode_cmd,
105	struct drm_gem_object **gobj_p)
106	{
107	struct drm_device *dev = afbdev->helper.dev;
108	u32 bpp, depth;
109	u32 size;
110	struct drm_gem_object *gobj;
111
112	int ret = 0;
113	drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
114
115	size = mode_cmd->pitches[0] * mode_cmd->height;
116	ret = mgag200_gem_create(dev, size, true, &gobj);
117	if (ret)
118	return ret;
119
120	*gobj_p = gobj;
121	return ret;
122	}
123
124	static int mgag200fb_create(struct mga_fbdev *mfbdev,
125	struct drm_fb_helper_surface_size *sizes)
126	{
127	struct drm_device *dev = mfbdev->helper.dev;
128	struct drm_mode_fb_cmd2 mode_cmd;
129	struct mga_device *mdev = dev->dev_private;
130	struct fb_info *info;
131	struct drm_framebuffer *fb;
132	struct drm_gem_object *gobj = NULL;
133	struct device *device = &dev->pdev->dev;
134	struct mgag200_bo *bo;
135	int ret;
136	void *sysram;
137	int size;
138
139	mode_cmd.width = sizes->surface_width;
140	mode_cmd.height = sizes->surface_height;
141	mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7) / 8);
142
143	mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
144	sizes->surface_depth);
145	size = mode_cmd.pitches[0] * mode_cmd.height;
146
147	ret = mgag200fb_create_object(mfbdev, &mode_cmd, &gobj);
148	if (ret) {
149	DRM_ERROR("failed to create fbcon backing object %d\n", ret);
150	return ret;
151	}
152	bo = gem_to_mga_bo(gobj);
153
154	sysram = vmalloc(size);
155	if (!sysram)
156	return -ENOMEM;
157
158	info = framebuffer_alloc(0, device);
159	if (info == NULL)
160	return -ENOMEM;
161
162	info->par = mfbdev;
163
164	ret = mgag200_framebuffer_init(dev, &mfbdev->mfb, &mode_cmd, gobj);
165	if (ret)
166	return ret;
167
168	mfbdev->sysram = sysram;
169	mfbdev->size = size;
170
171	fb = &mfbdev->mfb.base;
172
173	/* setup helper */
174	mfbdev->helper.fb = fb;
175	mfbdev->helper.fbdev = info;
176
177	ret = fb_alloc_cmap(&info->cmap, 256, 0);
178	if (ret) {
179	DRM_ERROR("%s: can't allocate color map\n", info->fix.id);
180	ret = -ENOMEM;
181	goto out;
182	}
183
184	strcpy(info->fix.id, "mgadrmfb");
185
186	info->flags = FBINFO_DEFAULT \| FBINFO_CAN_FORCE_OUTPUT;
187	info->fbops = &mgag200fb_ops;
188
189	/* setup aperture base/size for vesafb takeover */
190	info->apertures = alloc_apertures(1);
191	if (!info->apertures) {
192	ret = -ENOMEM;
193	goto out;
194	}
195	info->apertures->ranges[0].base = mdev->dev->mode_config.fb_base;
196	info->apertures->ranges[0].size = mdev->mc.vram_size;
197
198	drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
199	drm_fb_helper_fill_var(info, &mfbdev->helper, sizes->fb_width,
200	sizes->fb_height);
201
202	info->screen_base = sysram;
203	info->screen_size = size;
204	info->pixmap.flags = FB_PIXMAP_SYSTEM;
205
206	DRM_DEBUG_KMS("allocated %dx%d\n",
207	fb->width, fb->height);
208	return 0;
209	out:
210	return ret;
211	}
212
213	static int mga_fb_find_or_create_single(struct drm_fb_helper *helper,
214	struct drm_fb_helper_surface_size
215	*sizes)
216	{
217	struct mga_fbdev mfbdev = (struct mga_fbdev )helper;
218	int new_fb = 0;
219	int ret;
220
221	if (!helper->fb) {
222	ret = mgag200fb_create(mfbdev, sizes);
223	if (ret)
224	return ret;
225	new_fb = 1;
226	}
227	return new_fb;
228	}
229
230	static int mga_fbdev_destroy(struct drm_device *dev,
231	struct mga_fbdev *mfbdev)
232	{
233	struct fb_info *info;
234	struct mga_framebuffer *mfb = &mfbdev->mfb;
235
236	if (mfbdev->helper.fbdev) {
237	info = mfbdev->helper.fbdev;
238
239	unregister_framebuffer(info);
240	if (info->cmap.len)
241	fb_dealloc_cmap(&info->cmap);
242	framebuffer_release(info);
243	}
244
245	if (mfb->obj) {
246	drm_gem_object_unreference_unlocked(mfb->obj);
247	mfb->obj = NULL;
248	}
249	drm_fb_helper_fini(&mfbdev->helper);
250	vfree(mfbdev->sysram);
36206361	251	drm_framebuffer_unregister_private(&mfb->base);
414c4531 DA	252	drm_framebuffer_cleanup(&mfb->base);
	253
	254	return 0;
	255	}
	256
	257	static struct drm_fb_helper_funcs mga_fb_helper_funcs = {
	258	.gamma_set = mga_crtc_fb_gamma_set,
	259	.gamma_get = mga_crtc_fb_gamma_get,
	260	.fb_probe = mga_fb_find_or_create_single,
	261	};
	262
	263	int mgag200_fbdev_init(struct mga_device *mdev)
	264	{
	265	struct mga_fbdev *mfbdev;
	266	int ret;
	267
	268	mfbdev = kzalloc(sizeof(struct mga_fbdev), GFP_KERNEL);
	269	if (!mfbdev)
	270	return -ENOMEM;
	271
	272	mdev->mfbdev = mfbdev;
	273	mfbdev->helper.funcs = &mga_fb_helper_funcs;
	274
	275	ret = drm_fb_helper_init(mdev->dev, &mfbdev->helper,
	276	mdev->num_crtc, MGAG200FB_CONN_LIMIT);
	277	if (ret) {
	278	kfree(mfbdev);
	279	return ret;
	280	}
	281	drm_fb_helper_single_add_all_connectors(&mfbdev->helper);
76a39dbf DV	282
	283	/* disable all the possible outputs/crtcs before entering KMS mode */
	284	drm_helper_disable_unused_functions(mdev->dev);
	285
414c4531 DA	286	drm_fb_helper_initial_config(&mfbdev->helper, 32);
	287
	288	return 0;
	289	}
	290
	291	void mgag200_fbdev_fini(struct mga_device *mdev)
	292	{
	293	if (!mdev->mfbdev)
	294	return;
	295
	296	mga_fbdev_destroy(mdev->dev, mdev->mfbdev);
	297	kfree(mdev->mfbdev);
	298	mdev->mfbdev = NULL;
	299	}