[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 = -EBUSY;
	bool unmap = false;
	bool store_for_later = false;
	int x2, y2;
	unsigned long flags;

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

	/*
	 * try and reserve the BO, if we fail with busy
	 * then the BO is being moved and we should
	 * store up the damage until later.
	 */
	if (!in_interrupt())
		ret = mgag200_bo_reserve(bo, true);
	if (ret) {
		if (ret != -EBUSY)
			return;

		store_for_later = true;
	}

	x2 = x + width - 1;
	y2 = y + height - 1;
	spin_lock_irqsave(&mfbdev->dirty_lock, flags);

	if (mfbdev->y1 < y)
		y = mfbdev->y1;
	if (mfbdev->y2 > y2)
		y2 = mfbdev->y2;
	if (mfbdev->x1 < x)
		x = mfbdev->x1;
	if (mfbdev->x2 > x2)
		x2 = mfbdev->x2;

	if (store_for_later) {
		mfbdev->x1 = x;
		mfbdev->x2 = x2;
		mfbdev->y1 = y;
		mfbdev->y2 = y2;
		spin_unlock_irqrestore(&mfbdev->dirty_lock, flags);
		return;
	}

	mfbdev->x1 = mfbdev->y1 = INT_MAX;
	mfbdev->x2 = mfbdev->y2 = 0;
	spin_unlock_irqrestore(&mfbdev->dirty_lock, flags);

	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 <= y2; 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, (x2 - x + 1) * 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 size;
	struct drm_gem_object *gobj;
	int ret = 0;

	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 drm_fb_helper *helper,
			   struct drm_fb_helper_surface_size *sizes)
{
	struct mga_fbdev *mfbdev = (struct mga_fbdev *)helper;
	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_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 = mgag200fb_create,
};

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

	mfbdev = devm_kzalloc(mdev->dev->dev, sizeof(struct mga_fbdev), GFP_KERNEL);
	if (!mfbdev)
		return -ENOMEM;

	mdev->mfbdev = mfbdev;
	mfbdev->helper.funcs = &mga_fb_helper_funcs;
	spin_lock_init(&mfbdev->dirty_lock);

	ret = drm_fb_helper_init(mdev->dev, &mfbdev->helper,
				 mdev->num_crtc, MGAG200FB_CONN_LIMIT);
	if (ret)
		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);
}
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;
a06b9a74	30	int ret = -EBUSY;
414c4531	31	bool unmap = false;
64171959 DA	32	bool store_for_later = false;
	33	int x2, y2;
	34	unsigned long flags;
414c4531 DA	35
	36	obj = mfbdev->mfb.obj;
	37	bo = gem_to_mga_bo(obj);
	38
64171959 DA	39	/*
	40	* try and reserve the BO, if we fail with busy
	41	* then the BO is being moved and we should
	42	* store up the damage until later.
	43	*/
a06b9a74 ML	44	if (!in_interrupt())
a06b9a74 ML	45	ret = mgag200_bo_reserve(bo, true);
414c4531	46	if (ret) {
64171959 DA	47	if (ret != -EBUSY)
	48	return;
	49
	50	store_for_later = true;
	51	}
	52
	53	x2 = x + width - 1;
	54	y2 = y + height - 1;
	55	spin_lock_irqsave(&mfbdev->dirty_lock, flags);
	56
	57	if (mfbdev->y1 < y)
	58	y = mfbdev->y1;
	59	if (mfbdev->y2 > y2)
	60	y2 = mfbdev->y2;
	61	if (mfbdev->x1 < x)
	62	x = mfbdev->x1;
	63	if (mfbdev->x2 > x2)
	64	x2 = mfbdev->x2;
	65
	66	if (store_for_later) {
	67	mfbdev->x1 = x;
	68	mfbdev->x2 = x2;
	69	mfbdev->y1 = y;
	70	mfbdev->y2 = y2;
	71	spin_unlock_irqrestore(&mfbdev->dirty_lock, flags);
414c4531 DA	72	return;
	73	}
	74
64171959 DA	75	mfbdev->x1 = mfbdev->y1 = INT_MAX;
	76	mfbdev->x2 = mfbdev->y2 = 0;
	77	spin_unlock_irqrestore(&mfbdev->dirty_lock, flags);
	78
414c4531 DA	79	if (!bo->kmap.virtual) {
	80	ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
	81	if (ret) {
	82	DRM_ERROR("failed to kmap fb updates\n");
	83	mgag200_bo_unreserve(bo);
	84	return;
	85	}
	86	unmap = true;
	87	}
64171959	88	for (i = y; i <= y2; i++) {
414c4531 DA	89	/* assume equal stride for now */
414c4531 DA	90	src_offset = dst_offset = i * mfbdev->mfb.base.pitches[0] + (x * bpp);
64171959	91	memcpy_toio(bo->kmap.virtual + src_offset, mfbdev->sysram + src_offset, (x2 - x + 1) * bpp);
414c4531 DA	92
	93	}
	94	if (unmap)
	95	ttm_bo_kunmap(&bo->kmap);
	96
	97	mgag200_bo_unreserve(bo);
	98	}
	99
	100	static void mga_fillrect(struct fb_info *info,
	101	const struct fb_fillrect *rect)
	102	{
	103	struct mga_fbdev *mfbdev = info->par;
	104	sys_fillrect(info, rect);
	105	mga_dirty_update(mfbdev, rect->dx, rect->dy, rect->width,
	106	rect->height);
	107	}
	108
	109	static void mga_copyarea(struct fb_info *info,
	110	const struct fb_copyarea *area)
	111	{
	112	struct mga_fbdev *mfbdev = info->par;
	113	sys_copyarea(info, area);
	114	mga_dirty_update(mfbdev, area->dx, area->dy, area->width,
	115	area->height);
	116	}
	117
	118	static void mga_imageblit(struct fb_info *info,
	119	const struct fb_image *image)
	120	{
	121	struct mga_fbdev *mfbdev = info->par;
	122	sys_imageblit(info, image);
	123	mga_dirty_update(mfbdev, image->dx, image->dy, image->width,
	124	image->height);
	125	}
	126
	127
	128	static struct fb_ops mgag200fb_ops = {
	129	.owner = THIS_MODULE,
	130	.fb_check_var = drm_fb_helper_check_var,
	131	.fb_set_par = drm_fb_helper_set_par,
	132	.fb_fillrect = mga_fillrect,
	133	.fb_copyarea = mga_copyarea,
	134	.fb_imageblit = mga_imageblit,
	135	.fb_pan_display = drm_fb_helper_pan_display,
	136	.fb_blank = drm_fb_helper_blank,
	137	.fb_setcmap = drm_fb_helper_setcmap,
	138	};
	139
	140	static int mgag200fb_create_object(struct mga_fbdev *afbdev,
	141	struct drm_mode_fb_cmd2 *mode_cmd,
	142	struct drm_gem_object **gobj_p)
	143	{
	144	struct drm_device *dev = afbdev->helper.dev;
414c4531 DA	145	u32 size;
414c4531 DA	146	struct drm_gem_object *gobj;
414c4531	147	int ret = 0;
414c4531 DA	148
	149	size = mode_cmd->pitches[0] * mode_cmd->height;
	150	ret = mgag200_gem_create(dev, size, true, &gobj);
	151	if (ret)
	152	return ret;
	153
	154	*gobj_p = gobj;
	155	return ret;
	156	}
	157
cd5428a5	158	static int mgag200fb_create(struct drm_fb_helper *helper,
414c4531 DA	159	struct drm_fb_helper_surface_size *sizes)
414c4531 DA	160	{
cd5428a5	161	struct mga_fbdev mfbdev = (struct mga_fbdev )helper;
414c4531 DA	162	struct drm_device *dev = mfbdev->helper.dev;
	163	struct drm_mode_fb_cmd2 mode_cmd;
	164	struct mga_device *mdev = dev->dev_private;
	165	struct fb_info *info;
	166	struct drm_framebuffer *fb;
	167	struct drm_gem_object *gobj = NULL;
	168	struct device *device = &dev->pdev->dev;
	169	struct mgag200_bo *bo;
	170	int ret;
	171	void *sysram;
	172	int size;
	173
	174	mode_cmd.width = sizes->surface_width;
	175	mode_cmd.height = sizes->surface_height;
	176	mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7) / 8);
	177
	178	mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
	179	sizes->surface_depth);
	180	size = mode_cmd.pitches[0] * mode_cmd.height;
	181
	182	ret = mgag200fb_create_object(mfbdev, &mode_cmd, &gobj);
	183	if (ret) {
	184	DRM_ERROR("failed to create fbcon backing object %d\n", ret);
	185	return ret;
	186	}
	187	bo = gem_to_mga_bo(gobj);
	188
	189	sysram = vmalloc(size);
	190	if (!sysram)
	191	return -ENOMEM;
	192
	193	info = framebuffer_alloc(0, device);
	194	if (info == NULL)
	195	return -ENOMEM;
	196
	197	info->par = mfbdev;
	198
	199	ret = mgag200_framebuffer_init(dev, &mfbdev->mfb, &mode_cmd, gobj);
	200	if (ret)
	201	return ret;
	202
	203	mfbdev->sysram = sysram;
	204	mfbdev->size = size;
	205
	206	fb = &mfbdev->mfb.base;
	207
	208	/* setup helper */
	209	mfbdev->helper.fb = fb;
	210	mfbdev->helper.fbdev = info;
	211
	212	ret = fb_alloc_cmap(&info->cmap, 256, 0);
	213	if (ret) {
	214	DRM_ERROR("%s: can't allocate color map\n", info->fix.id);
	215	ret = -ENOMEM;
	216	goto out;
	217	}
	218
	219	strcpy(info->fix.id, "mgadrmfb");
	220
	221	info->flags = FBINFO_DEFAULT \| FBINFO_CAN_FORCE_OUTPUT;
	222	info->fbops = &mgag200fb_ops;
	223
	224	/* setup aperture base/size for vesafb takeover */
	225	info->apertures = alloc_apertures(1);
226	if (!info->apertures) {
227	ret = -ENOMEM;
228	goto out;
229	}
230	info->apertures->ranges[0].base = mdev->dev->mode_config.fb_base;
231	info->apertures->ranges[0].size = mdev->mc.vram_size;
232
233	drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
234	drm_fb_helper_fill_var(info, &mfbdev->helper, sizes->fb_width,
235	sizes->fb_height);
236
237	info->screen_base = sysram;
238	info->screen_size = size;
239	info->pixmap.flags = FB_PIXMAP_SYSTEM;
240
241	DRM_DEBUG_KMS("allocated %dx%d\n",
242	fb->width, fb->height);
243	return 0;
244	out:
245	return ret;
246	}
247
414c4531 DA	248	static int mga_fbdev_destroy(struct drm_device *dev,
	249	struct mga_fbdev *mfbdev)
	250	{
	251	struct fb_info *info;
	252	struct mga_framebuffer *mfb = &mfbdev->mfb;
	253
	254	if (mfbdev->helper.fbdev) {
	255	info = mfbdev->helper.fbdev;
	256
	257	unregister_framebuffer(info);
	258	if (info->cmap.len)
	259	fb_dealloc_cmap(&info->cmap);
	260	framebuffer_release(info);
	261	}
	262
	263	if (mfb->obj) {
	264	drm_gem_object_unreference_unlocked(mfb->obj);
	265	mfb->obj = NULL;
	266	}
	267	drm_fb_helper_fini(&mfbdev->helper);
	268	vfree(mfbdev->sysram);
36206361	269	drm_framebuffer_unregister_private(&mfb->base);
414c4531 DA	270	drm_framebuffer_cleanup(&mfb->base);
	271
	272	return 0;
	273	}
	274
	275	static struct drm_fb_helper_funcs mga_fb_helper_funcs = {
	276	.gamma_set = mga_crtc_fb_gamma_set,
	277	.gamma_get = mga_crtc_fb_gamma_get,
cd5428a5	278	.fb_probe = mgag200fb_create,
414c4531 DA	279	};
	280
	281	int mgag200_fbdev_init(struct mga_device *mdev)
	282	{
	283	struct mga_fbdev *mfbdev;
	284	int ret;
	285
c2ed8844	286	mfbdev = devm_kzalloc(mdev->dev->dev, sizeof(struct mga_fbdev), GFP_KERNEL);
414c4531 DA	287	if (!mfbdev)
	288	return -ENOMEM;
	289
	290	mdev->mfbdev = mfbdev;
	291	mfbdev->helper.funcs = &mga_fb_helper_funcs;
64171959	292	spin_lock_init(&mfbdev->dirty_lock);
414c4531 DA	293
	294	ret = drm_fb_helper_init(mdev->dev, &mfbdev->helper,
	295	mdev->num_crtc, MGAG200FB_CONN_LIMIT);
c2ed8844	296	if (ret)
414c4531	297	return ret;
c2ed8844	298
414c4531	299	drm_fb_helper_single_add_all_connectors(&mfbdev->helper);
76a39dbf DV	300
	301	/* disable all the possible outputs/crtcs before entering KMS mode */
	302	drm_helper_disable_unused_functions(mdev->dev);
	303
414c4531 DA	304	drm_fb_helper_initial_config(&mfbdev->helper, 32);
	305
	306	return 0;
	307	}
	308
	309	void mgag200_fbdev_fini(struct mga_device *mdev)
	310	{
	311	if (!mdev->mfbdev)
	312	return;
	313
	314	mga_fbdev_destroy(mdev->dev, mdev->mfbdev);
414c4531	315	}