[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 "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 (drm_can_sleep())
		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;
	drm_fb_helper_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;
	drm_fb_helper_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;
	drm_fb_helper_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,
				   const 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 =
		container_of(helper, 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;
	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;
	}

	sysram = vmalloc(size);
	if (!sysram) {
		ret = -ENOMEM;
		goto err_sysram;
	}

	info = drm_fb_helper_alloc_fbi(helper);
	if (IS_ERR(info)) {
		ret = PTR_ERR(info);
		goto err_alloc_fbi;
	}

	info->par = mfbdev;

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

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

	fb = &mfbdev->mfb.base;

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

	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->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;

err_framebuffer_init:
	drm_fb_helper_release_fbi(helper);
err_alloc_fbi:
	vfree(sysram);
err_sysram:
	drm_gem_object_unreference_unlocked(gobj);

	return ret;
}

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

	drm_fb_helper_unregister_fbi(&mfbdev->helper);
	drm_fb_helper_release_fbi(&mfbdev->helper);

	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 const 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;
	int bpp_sel = 32;

	/* prefer 16bpp on low end gpus with limited VRAM */
	if (IS_G200_SE(mdev) && mdev->mc.vram_size < (2048*1024))
		bpp_sel = 16;

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

	mdev->mfbdev = mfbdev;
	spin_lock_init(&mfbdev->dirty_lock);

	drm_fb_helper_prepare(mdev->dev, &mfbdev->helper, &mga_fb_helper_funcs);

	ret = drm_fb_helper_init(mdev->dev, &mfbdev->helper,
				 mdev->num_crtc, MGAG200FB_CONN_LIMIT);
	if (ret)
		goto err_fb_helper;

	ret = drm_fb_helper_single_add_all_connectors(&mfbdev->helper);
	if (ret)
		goto err_fb_setup;

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

	ret = drm_fb_helper_initial_config(&mfbdev->helper, bpp_sel);
	if (ret)
		goto err_fb_setup;

	return 0;

err_fb_setup:
	drm_fb_helper_fini(&mfbdev->helper);
err_fb_helper:
	mdev->mfbdev = NULL;

	return ret;
}

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	17
414c4531 DA	18	#include "mgag200_drv.h"
	19
	20	static void mga_dirty_update(struct mga_fbdev *mfbdev,
	21	int x, int y, int width, int height)
	22	{
	23	int i;
	24	struct drm_gem_object *obj;
	25	struct mgag200_bo *bo;
	26	int src_offset, dst_offset;
	27	int bpp = (mfbdev->mfb.base.bits_per_pixel + 7)/8;
a06b9a74	28	int ret = -EBUSY;
414c4531	29	bool unmap = false;
64171959 DA	30	bool store_for_later = false;
	31	int x2, y2;
	32	unsigned long flags;
414c4531 DA	33
	34	obj = mfbdev->mfb.obj;
	35	bo = gem_to_mga_bo(obj);
	36
64171959 DA	37	/*
	38	* try and reserve the BO, if we fail with busy
	39	* then the BO is being moved and we should
	40	* store up the damage until later.
	41	*/
8b7ad1bb	42	if (drm_can_sleep())
a06b9a74	43	ret = mgag200_bo_reserve(bo, true);
414c4531	44	if (ret) {
64171959 DA	45	if (ret != -EBUSY)
	46	return;
	47
	48	store_for_later = true;
	49	}
	50
	51	x2 = x + width - 1;
	52	y2 = y + height - 1;
	53	spin_lock_irqsave(&mfbdev->dirty_lock, flags);
	54
	55	if (mfbdev->y1 < y)
	56	y = mfbdev->y1;
	57	if (mfbdev->y2 > y2)
	58	y2 = mfbdev->y2;
	59	if (mfbdev->x1 < x)
	60	x = mfbdev->x1;
	61	if (mfbdev->x2 > x2)
	62	x2 = mfbdev->x2;
	63
	64	if (store_for_later) {
	65	mfbdev->x1 = x;
	66	mfbdev->x2 = x2;
	67	mfbdev->y1 = y;
	68	mfbdev->y2 = y2;
	69	spin_unlock_irqrestore(&mfbdev->dirty_lock, flags);
414c4531 DA	70	return;
	71	}
	72
64171959 DA	73	mfbdev->x1 = mfbdev->y1 = INT_MAX;
	74	mfbdev->x2 = mfbdev->y2 = 0;
	75	spin_unlock_irqrestore(&mfbdev->dirty_lock, flags);
	76
414c4531 DA	77	if (!bo->kmap.virtual) {
	78	ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
	79	if (ret) {
	80	DRM_ERROR("failed to kmap fb updates\n");
	81	mgag200_bo_unreserve(bo);
	82	return;
	83	}
	84	unmap = true;
	85	}
64171959	86	for (i = y; i <= y2; i++) {
414c4531 DA	87	/* assume equal stride for now */
414c4531 DA	88	src_offset = dst_offset = i * mfbdev->mfb.base.pitches[0] + (x * bpp);
64171959	89	memcpy_toio(bo->kmap.virtual + src_offset, mfbdev->sysram + src_offset, (x2 - x + 1) * bpp);
414c4531 DA	90
	91	}
	92	if (unmap)
	93	ttm_bo_kunmap(&bo->kmap);
	94
	95	mgag200_bo_unreserve(bo);
	96	}
	97
	98	static void mga_fillrect(struct fb_info *info,
	99	const struct fb_fillrect *rect)
	100	{
	101	struct mga_fbdev *mfbdev = info->par;
4f72a6ea	102	drm_fb_helper_sys_fillrect(info, rect);
414c4531 DA	103	mga_dirty_update(mfbdev, rect->dx, rect->dy, rect->width,
	104	rect->height);
	105	}
	106
	107	static void mga_copyarea(struct fb_info *info,
	108	const struct fb_copyarea *area)
	109	{
	110	struct mga_fbdev *mfbdev = info->par;
4f72a6ea	111	drm_fb_helper_sys_copyarea(info, area);
414c4531 DA	112	mga_dirty_update(mfbdev, area->dx, area->dy, area->width,
	113	area->height);
	114	}
	115
	116	static void mga_imageblit(struct fb_info *info,
	117	const struct fb_image *image)
	118	{
	119	struct mga_fbdev *mfbdev = info->par;
4f72a6ea	120	drm_fb_helper_sys_imageblit(info, image);
414c4531 DA	121	mga_dirty_update(mfbdev, image->dx, image->dy, image->width,
	122	image->height);
	123	}
	124
	125
	126	static struct fb_ops mgag200fb_ops = {
	127	.owner = THIS_MODULE,
	128	.fb_check_var = drm_fb_helper_check_var,
	129	.fb_set_par = drm_fb_helper_set_par,
	130	.fb_fillrect = mga_fillrect,
	131	.fb_copyarea = mga_copyarea,
	132	.fb_imageblit = mga_imageblit,
	133	.fb_pan_display = drm_fb_helper_pan_display,
	134	.fb_blank = drm_fb_helper_blank,
	135	.fb_setcmap = drm_fb_helper_setcmap,
	136	};
	137
	138	static int mgag200fb_create_object(struct mga_fbdev *afbdev,
1eb83451	139	const struct drm_mode_fb_cmd2 *mode_cmd,
414c4531 DA	140	struct drm_gem_object **gobj_p)
	141	{
	142	struct drm_device *dev = afbdev->helper.dev;
414c4531 DA	143	u32 size;
414c4531 DA	144	struct drm_gem_object *gobj;
414c4531	145	int ret = 0;
414c4531 DA	146
	147	size = mode_cmd->pitches[0] * mode_cmd->height;
	148	ret = mgag200_gem_create(dev, size, true, &gobj);
	149	if (ret)
	150	return ret;
	151
	152	*gobj_p = gobj;
	153	return ret;
	154	}
	155
cd5428a5	156	static int mgag200fb_create(struct drm_fb_helper *helper,
414c4531 DA	157	struct drm_fb_helper_surface_size *sizes)
414c4531 DA	158	{
98cc0343 FF	159	struct mga_fbdev *mfbdev =
98cc0343 FF	160	container_of(helper, struct mga_fbdev, helper);
414c4531 DA	161	struct drm_device *dev = mfbdev->helper.dev;
	162	struct drm_mode_fb_cmd2 mode_cmd;
	163	struct mga_device *mdev = dev->dev_private;
	164	struct fb_info *info;
	165	struct drm_framebuffer *fb;
	166	struct drm_gem_object *gobj = NULL;
414c4531 DA	167	int ret;
	168	void *sysram;
	169	int size;
	170
	171	mode_cmd.width = sizes->surface_width;
	172	mode_cmd.height = sizes->surface_height;
	173	mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7) / 8);
	174
	175	mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
	176	sizes->surface_depth);
	177	size = mode_cmd.pitches[0] * mode_cmd.height;
	178
	179	ret = mgag200fb_create_object(mfbdev, &mode_cmd, &gobj);
	180	if (ret) {
	181	DRM_ERROR("failed to create fbcon backing object %d\n", ret);
	182	return ret;
	183	}
414c4531 DA	184
414c4531 DA	185	sysram = vmalloc(size);
b0f56683 WY	186	if (!sysram) {
b0f56683 WY	187	ret = -ENOMEM;
aec9e129	188	goto err_sysram;
b0f56683	189	}
414c4531	190
4f72a6ea	191	info = drm_fb_helper_alloc_fbi(helper);
aec9e129 AT	192	if (IS_ERR(info)) {
	193	ret = PTR_ERR(info);
	194	goto err_alloc_fbi;
	195	}
414c4531 DA	196
	197	info->par = mfbdev;
	198
	199	ret = mgag200_framebuffer_init(dev, &mfbdev->mfb, &mode_cmd, gobj);
	200	if (ret)
aec9e129	201	goto err_framebuffer_init;
414c4531 DA	202
	203	mfbdev->sysram = sysram;
	204	mfbdev->size = size;
	205
	206	fb = &mfbdev->mfb.base;
	207
	208	/* setup helper */
	209	mfbdev->helper.fb = fb;
414c4531 DA	210
	211	strcpy(info->fix.id, "mgadrmfb");
	212
	213	info->flags = FBINFO_DEFAULT \| FBINFO_CAN_FORCE_OUTPUT;
	214	info->fbops = &mgag200fb_ops;
	215
	216	/* setup aperture base/size for vesafb takeover */
414c4531 DA	217	info->apertures->ranges[0].base = mdev->dev->mode_config.fb_base;
	218	info->apertures->ranges[0].size = mdev->mc.vram_size;
	219
	220	drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
	221	drm_fb_helper_fill_var(info, &mfbdev->helper, sizes->fb_width,
	222	sizes->fb_height);
	223
	224	info->screen_base = sysram;
	225	info->screen_size = size;
	226	info->pixmap.flags = FB_PIXMAP_SYSTEM;
	227
	228	DRM_DEBUG_KMS("allocated %dx%d\n",
	229	fb->width, fb->height);
aec9e129	230
414c4531	231	return 0;
aec9e129 AT	232
	233	err_framebuffer_init:
	234	drm_fb_helper_release_fbi(helper);
	235	err_alloc_fbi:
	236	vfree(sysram);
	237	err_sysram:
	238	drm_gem_object_unreference_unlocked(gobj);
	239
	240	return ret;
414c4531 DA	241	}
414c4531 DA	242
414c4531 DA	243	static int mga_fbdev_destroy(struct drm_device *dev,
	244	struct mga_fbdev *mfbdev)
	245	{
414c4531 DA	246	struct mga_framebuffer *mfb = &mfbdev->mfb;
414c4531 DA	247
4f72a6ea AT	248	drm_fb_helper_unregister_fbi(&mfbdev->helper);
4f72a6ea AT	249	drm_fb_helper_release_fbi(&mfbdev->helper);
414c4531 DA	250
	251	if (mfb->obj) {
	252	drm_gem_object_unreference_unlocked(mfb->obj);
	253	mfb->obj = NULL;
	254	}
	255	drm_fb_helper_fini(&mfbdev->helper);
	256	vfree(mfbdev->sysram);
36206361	257	drm_framebuffer_unregister_private(&mfb->base);
414c4531 DA	258	drm_framebuffer_cleanup(&mfb->base);
	259
	260	return 0;
	261	}
	262
3a493879	263	static const struct drm_fb_helper_funcs mga_fb_helper_funcs = {
414c4531 DA	264	.gamma_set = mga_crtc_fb_gamma_set,
414c4531 DA	265	.gamma_get = mga_crtc_fb_gamma_get,
cd5428a5	266	.fb_probe = mgag200fb_create,
414c4531 DA	267	};
	268
	269	int mgag200_fbdev_init(struct mga_device *mdev)
	270	{
	271	struct mga_fbdev *mfbdev;
	272	int ret;
918be888 DA	273	int bpp_sel = 32;
	274
	275	/* prefer 16bpp on low end gpus with limited VRAM */
	276	if (IS_G200_SE(mdev) && mdev->mc.vram_size < (2048*1024))
	277	bpp_sel = 16;
414c4531	278
c2ed8844	279	mfbdev = devm_kzalloc(mdev->dev->dev, sizeof(struct mga_fbdev), GFP_KERNEL);
414c4531 DA	280	if (!mfbdev)
	281	return -ENOMEM;
	282
	283	mdev->mfbdev = mfbdev;
64171959	284	spin_lock_init(&mfbdev->dirty_lock);
414c4531	285
10a23102 TR	286	drm_fb_helper_prepare(mdev->dev, &mfbdev->helper, &mga_fb_helper_funcs);
10a23102 TR	287
414c4531 DA	288	ret = drm_fb_helper_init(mdev->dev, &mfbdev->helper,
414c4531 DA	289	mdev->num_crtc, MGAG200FB_CONN_LIMIT);
c2ed8844	290	if (ret)
aec9e129	291	goto err_fb_helper;
c2ed8844	292
01934c2a TR	293	ret = drm_fb_helper_single_add_all_connectors(&mfbdev->helper);
01934c2a TR	294	if (ret)
aec9e129	295	goto err_fb_setup;
76a39dbf DV	296
	297	/* disable all the possible outputs/crtcs before entering KMS mode */
	298	drm_helper_disable_unused_functions(mdev->dev);
	299
01934c2a TR	300	ret = drm_fb_helper_initial_config(&mfbdev->helper, bpp_sel);
01934c2a TR	301	if (ret)
aec9e129	302	goto err_fb_setup;
414c4531 DA	303
414c4531 DA	304	return 0;
01934c2a	305
aec9e129	306	err_fb_setup:
01934c2a	307	drm_fb_helper_fini(&mfbdev->helper);
aec9e129 AT	308	err_fb_helper:
	309	mdev->mfbdev = NULL;
	310
01934c2a	311	return ret;
414c4531 DA	312	}
	313
	314	void mgag200_fbdev_fini(struct mga_device *mdev)
	315	{
	316	if (!mdev->mfbdev)
	317	return;
	318
	319	mga_fbdev_destroy(mdev->dev, mdev->mfbdev);
414c4531	320	}