[mirror_ubuntu-artful-kernel.git] / drivers / gpu / drm / msm / msm_fbdev.c

/*
 * Copyright (C) 2013 Red Hat
 * Author: Rob Clark <robdclark@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "msm_drv.h"

#include "drm_crtc.h"
#include "drm_fb_helper.h"
#include "msm_gem.h"

extern int msm_gem_mmap_obj(struct drm_gem_object *obj,
					struct vm_area_struct *vma);
static int msm_fbdev_mmap(struct fb_info *info, struct vm_area_struct *vma);

/*
 * fbdev funcs, to implement legacy fbdev interface on top of drm driver
 */

#define to_msm_fbdev(x) container_of(x, struct msm_fbdev, base)

struct msm_fbdev {
	struct drm_fb_helper base;
	struct drm_framebuffer *fb;
	struct drm_gem_object *bo;
};

static struct fb_ops msm_fb_ops = {
	.owner = THIS_MODULE,
	DRM_FB_HELPER_DEFAULT_OPS,

	/* Note: to properly handle manual update displays, we wrap the
	 * basic fbdev ops which write to the framebuffer
	 */
	.fb_read = drm_fb_helper_sys_read,
	.fb_write = drm_fb_helper_sys_write,
	.fb_fillrect = drm_fb_helper_sys_fillrect,
	.fb_copyarea = drm_fb_helper_sys_copyarea,
	.fb_imageblit = drm_fb_helper_sys_imageblit,
	.fb_mmap = msm_fbdev_mmap,
};

static int msm_fbdev_mmap(struct fb_info *info, struct vm_area_struct *vma)
{
	struct drm_fb_helper *helper = (struct drm_fb_helper *)info->par;
	struct msm_fbdev *fbdev = to_msm_fbdev(helper);
	struct drm_gem_object *drm_obj = fbdev->bo;
	int ret = 0;

	ret = drm_gem_mmap_obj(drm_obj, drm_obj->size, vma);
	if (ret) {
		pr_err("%s:drm_gem_mmap_obj fail\n", __func__);
		return ret;
	}

	return msm_gem_mmap_obj(drm_obj, vma);
}

static int msm_fbdev_create(struct drm_fb_helper *helper,
		struct drm_fb_helper_surface_size *sizes)
{
	struct msm_fbdev *fbdev = to_msm_fbdev(helper);
	struct drm_device *dev = helper->dev;
	struct drm_framebuffer *fb = NULL;
	struct fb_info *fbi = NULL;
	struct drm_mode_fb_cmd2 mode_cmd = {0};
	uint64_t paddr;
	int ret, size;

	DBG("create fbdev: %dx%d@%d (%dx%d)", sizes->surface_width,
			sizes->surface_height, sizes->surface_bpp,
			sizes->fb_width, sizes->fb_height);

	mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
			sizes->surface_depth);

	mode_cmd.width = sizes->surface_width;
	mode_cmd.height = sizes->surface_height;

	mode_cmd.pitches[0] = align_pitch(
			mode_cmd.width, sizes->surface_bpp);

	/* allocate backing bo */
	size = mode_cmd.pitches[0] * mode_cmd.height;
	DBG("allocating %d bytes for fb %d", size, dev->primary->index);
	mutex_lock(&dev->struct_mutex);
	fbdev->bo = msm_gem_new(dev, size, MSM_BO_SCANOUT |
			MSM_BO_WC | MSM_BO_STOLEN);
	mutex_unlock(&dev->struct_mutex);
	if (IS_ERR(fbdev->bo)) {
		ret = PTR_ERR(fbdev->bo);
		fbdev->bo = NULL;
		dev_err(dev->dev, "failed to allocate buffer object: %d\n", ret);
		goto fail;
	}

	fb = msm_framebuffer_init(dev, &mode_cmd, &fbdev->bo);
	if (IS_ERR(fb)) {
		dev_err(dev->dev, "failed to allocate fb\n");
		/* note: if fb creation failed, we can't rely on fb destroy
		 * to unref the bo:
		 */
		drm_gem_object_unreference_unlocked(fbdev->bo);
		ret = PTR_ERR(fb);
		goto fail;
	}

	mutex_lock(&dev->struct_mutex);

	/*
	 * NOTE: if we can be guaranteed to be able to map buffer
	 * in panic (ie. lock-safe, etc) we could avoid pinning the
	 * buffer now:
	 */
	ret = msm_gem_get_iova_locked(fbdev->bo, 0, &paddr);
	if (ret) {
		dev_err(dev->dev, "failed to get buffer obj iova: %d\n", ret);
		goto fail_unlock;
	}

	fbi = drm_fb_helper_alloc_fbi(helper);
	if (IS_ERR(fbi)) {
		dev_err(dev->dev, "failed to allocate fb info\n");
		ret = PTR_ERR(fbi);
		goto fail_unlock;
	}

	DBG("fbi=%p, dev=%p", fbi, dev);

	fbdev->fb = fb;
	helper->fb = fb;

	fbi->par = helper;
	fbi->flags = FBINFO_DEFAULT;
	fbi->fbops = &msm_fb_ops;

	strcpy(fbi->fix.id, "msm");

	drm_fb_helper_fill_fix(fbi, fb->pitches[0], fb->format->depth);
	drm_fb_helper_fill_var(fbi, helper, sizes->fb_width, sizes->fb_height);

	dev->mode_config.fb_base = paddr;

	fbi->screen_base = msm_gem_get_vaddr_locked(fbdev->bo);
	if (IS_ERR(fbi->screen_base)) {
		ret = PTR_ERR(fbi->screen_base);
		goto fail_unlock;
	}
	fbi->screen_size = fbdev->bo->size;
	fbi->fix.smem_start = paddr;
	fbi->fix.smem_len = fbdev->bo->size;

	DBG("par=%p, %dx%d", fbi->par, fbi->var.xres, fbi->var.yres);
	DBG("allocated %dx%d fb", fbdev->fb->width, fbdev->fb->height);

	mutex_unlock(&dev->struct_mutex);

	return 0;

fail_unlock:
	mutex_unlock(&dev->struct_mutex);
fail:

	if (ret) {
		if (fb)
			drm_framebuffer_remove(fb);
	}

	return ret;
}

static const struct drm_fb_helper_funcs msm_fb_helper_funcs = {
	.fb_probe = msm_fbdev_create,
};

/* initialize fbdev helper */
struct drm_fb_helper *msm_fbdev_init(struct drm_device *dev)
{
	struct msm_drm_private *priv = dev->dev_private;
	struct msm_fbdev *fbdev = NULL;
	struct drm_fb_helper *helper;
	int ret;

	fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
	if (!fbdev)
		goto fail;

	helper = &fbdev->base;

	drm_fb_helper_prepare(dev, helper, &msm_fb_helper_funcs);

	ret = drm_fb_helper_init(dev, helper, priv->num_connectors);
	if (ret) {
		dev_err(dev->dev, "could not init fbdev: ret=%d\n", ret);
		goto fail;
	}

	ret = drm_fb_helper_single_add_all_connectors(helper);
	if (ret)
		goto fini;

	ret = drm_fb_helper_initial_config(helper, 32);
	if (ret)
		goto fini;

	priv->fbdev = helper;

	return helper;

fini:
	drm_fb_helper_fini(helper);
fail:
	kfree(fbdev);
	return NULL;
}

void msm_fbdev_free(struct drm_device *dev)
{
	struct msm_drm_private *priv = dev->dev_private;
	struct drm_fb_helper *helper = priv->fbdev;
	struct msm_fbdev *fbdev;

	DBG();

	drm_fb_helper_unregister_fbi(helper);

	drm_fb_helper_fini(helper);

	fbdev = to_msm_fbdev(priv->fbdev);

	/* this will free the backing object */
	if (fbdev->fb) {
		msm_gem_put_vaddr(fbdev->bo);
		drm_framebuffer_remove(fbdev->fb);
	}

	kfree(fbdev);

	priv->fbdev = NULL;
}
Commit	Line	Data
c8afe684 RC	1	/*
	2	* Copyright (C) 2013 Red Hat
	3	* Author: Rob Clark <robdclark@gmail.com>
	4	*
	5	* This program is free software; you can redistribute it and/or modify it
	6	* under the terms of the GNU General Public License version 2 as published by
	7	* the Free Software Foundation.
	8	*
	9	* This program is distributed in the hope that it will be useful, but WITHOUT
	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	12	* more details.
	13	*
	14	* You should have received a copy of the GNU General Public License along with
	15	* this program. If not, see <http://www.gnu.org/licenses/>.
	16	*/
	17
	18	#include "msm_drv.h"
	19
	20	#include "drm_crtc.h"
	21	#include "drm_fb_helper.h"
8f67da33 HL	22	#include "msm_gem.h"
	23
	24	extern int msm_gem_mmap_obj(struct drm_gem_object *obj,
	25	struct vm_area_struct *vma);
	26	static int msm_fbdev_mmap(struct fb_info info, struct vm_area_struct vma);
c8afe684 RC	27
	28	/*
	29	* fbdev funcs, to implement legacy fbdev interface on top of drm driver
	30	*/
	31
	32	#define to_msm_fbdev(x) container_of(x, struct msm_fbdev, base)
	33
	34	struct msm_fbdev {
	35	struct drm_fb_helper base;
	36	struct drm_framebuffer *fb;
	37	struct drm_gem_object *bo;
	38	};
	39
	40	static struct fb_ops msm_fb_ops = {
	41	.owner = THIS_MODULE,
00d44063	42	DRM_FB_HELPER_DEFAULT_OPS,
c8afe684 RC	43
	44	/* Note: to properly handle manual update displays, we wrap the
	45	* basic fbdev ops which write to the framebuffer
	46	*/
778014f0 AT	47	.fb_read = drm_fb_helper_sys_read,
	48	.fb_write = drm_fb_helper_sys_write,
	49	.fb_fillrect = drm_fb_helper_sys_fillrect,
	50	.fb_copyarea = drm_fb_helper_sys_copyarea,
	51	.fb_imageblit = drm_fb_helper_sys_imageblit,
8f67da33	52	.fb_mmap = msm_fbdev_mmap,
c8afe684 RC	53	};
c8afe684 RC	54
8f67da33 HL	55	static int msm_fbdev_mmap(struct fb_info info, struct vm_area_struct vma)
	56	{
	57	struct drm_fb_helper helper = (struct drm_fb_helper )info->par;
	58	struct msm_fbdev *fbdev = to_msm_fbdev(helper);
	59	struct drm_gem_object *drm_obj = fbdev->bo;
8f67da33 HL	60	int ret = 0;
8f67da33 HL	61
8f67da33	62	ret = drm_gem_mmap_obj(drm_obj, drm_obj->size, vma);
8f67da33 HL	63	if (ret) {
	64	pr_err("%s:drm_gem_mmap_obj fail\n", __func__);
	65	return ret;
	66	}
	67
	68	return msm_gem_mmap_obj(drm_obj, vma);
	69	}
	70
c8afe684 RC	71	static int msm_fbdev_create(struct drm_fb_helper *helper,
	72	struct drm_fb_helper_surface_size *sizes)
	73	{
	74	struct msm_fbdev *fbdev = to_msm_fbdev(helper);
	75	struct drm_device *dev = helper->dev;
	76	struct drm_framebuffer *fb = NULL;
	77	struct fb_info *fbi = NULL;
	78	struct drm_mode_fb_cmd2 mode_cmd = {0};
78babc16	79	uint64_t paddr;
c8afe684 RC	80	int ret, size;
c8afe684 RC	81
c8afe684 RC	82	DBG("create fbdev: %dx%d@%d (%dx%d)", sizes->surface_width,
	83	sizes->surface_height, sizes->surface_bpp,
	84	sizes->fb_width, sizes->fb_height);
	85
	86	mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
	87	sizes->surface_depth);
	88
	89	mode_cmd.width = sizes->surface_width;
	90	mode_cmd.height = sizes->surface_height;
	91
	92	mode_cmd.pitches[0] = align_pitch(
	93	mode_cmd.width, sizes->surface_bpp);
	94
	95	/* allocate backing bo */
	96	size = mode_cmd.pitches[0] * mode_cmd.height;
	97	DBG("allocating %d bytes for fb %d", size, dev->primary->index);
	98	mutex_lock(&dev->struct_mutex);
072f1f91 RC	99	fbdev->bo = msm_gem_new(dev, size, MSM_BO_SCANOUT \|
072f1f91 RC	100	MSM_BO_WC \| MSM_BO_STOLEN);
c8afe684 RC	101	mutex_unlock(&dev->struct_mutex);
	102	if (IS_ERR(fbdev->bo)) {
	103	ret = PTR_ERR(fbdev->bo);
	104	fbdev->bo = NULL;
	105	dev_err(dev->dev, "failed to allocate buffer object: %d\n", ret);
	106	goto fail;
	107	}
	108
	109	fb = msm_framebuffer_init(dev, &mode_cmd, &fbdev->bo);
	110	if (IS_ERR(fb)) {
	111	dev_err(dev->dev, "failed to allocate fb\n");
	112	/* note: if fb creation failed, we can't rely on fb destroy
	113	* to unref the bo:
	114	*/
dee2eed2	115	drm_gem_object_unreference_unlocked(fbdev->bo);
c8afe684 RC	116	ret = PTR_ERR(fb);
	117	goto fail;
	118	}
	119
	120	mutex_lock(&dev->struct_mutex);
	121
8f67da33 HL	122	/*
	123	* NOTE: if we can be guaranteed to be able to map buffer
	124	* in panic (ie. lock-safe, etc) we could avoid pinning the
	125	* buffer now:
	126	*/
	127	ret = msm_gem_get_iova_locked(fbdev->bo, 0, &paddr);
	128	if (ret) {
	129	dev_err(dev->dev, "failed to get buffer obj iova: %d\n", ret);
0d9509d2	130	goto fail_unlock;
8f67da33	131	}
c8afe684	132
778014f0 AT	133	fbi = drm_fb_helper_alloc_fbi(helper);
778014f0 AT	134	if (IS_ERR(fbi)) {
c8afe684	135	dev_err(dev->dev, "failed to allocate fb info\n");
778014f0	136	ret = PTR_ERR(fbi);
c8afe684 RC	137	goto fail_unlock;
	138	}
	139
	140	DBG("fbi=%p, dev=%p", fbi, dev);
	141
	142	fbdev->fb = fb;
	143	helper->fb = fb;
c8afe684 RC	144
	145	fbi->par = helper;
	146	fbi->flags = FBINFO_DEFAULT;
	147	fbi->fbops = &msm_fb_ops;
	148
	149	strcpy(fbi->fix.id, "msm");
	150
b00c600e	151	drm_fb_helper_fill_fix(fbi, fb->pitches[0], fb->format->depth);
c8afe684 RC	152	drm_fb_helper_fill_var(fbi, helper, sizes->fb_width, sizes->fb_height);
	153
	154	dev->mode_config.fb_base = paddr;
	155
18f23049	156	fbi->screen_base = msm_gem_get_vaddr_locked(fbdev->bo);
69a834c2 RC	157	if (IS_ERR(fbi->screen_base)) {
	158	ret = PTR_ERR(fbi->screen_base);
	159	goto fail_unlock;
	160	}
c8afe684 RC	161	fbi->screen_size = fbdev->bo->size;
	162	fbi->fix.smem_start = paddr;
	163	fbi->fix.smem_len = fbdev->bo->size;
	164
	165	DBG("par=%p, %dx%d", fbi->par, fbi->var.xres, fbi->var.yres);
	166	DBG("allocated %dx%d fb", fbdev->fb->width, fbdev->fb->height);
	167
	168	mutex_unlock(&dev->struct_mutex);
	169
	170	return 0;
	171
	172	fail_unlock:
	173	mutex_unlock(&dev->struct_mutex);
	174	fail:
	175
	176	if (ret) {
f5c5d57a	177	if (fb)
c8afe684	178	drm_framebuffer_remove(fb);
c8afe684 RC	179	}
	180
	181	return ret;
	182	}
	183
3a493879	184	static const struct drm_fb_helper_funcs msm_fb_helper_funcs = {
c8afe684 RC	185	.fb_probe = msm_fbdev_create,
	186	};
	187
	188	/* initialize fbdev helper */
	189	struct drm_fb_helper msm_fbdev_init(struct drm_device dev)
	190	{
	191	struct msm_drm_private *priv = dev->dev_private;
	192	struct msm_fbdev *fbdev = NULL;
	193	struct drm_fb_helper *helper;
8f67da33	194	int ret;
c8afe684 RC	195
	196	fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
	197	if (!fbdev)
	198	goto fail;
	199
	200	helper = &fbdev->base;
	201
10a23102	202	drm_fb_helper_prepare(dev, helper, &msm_fb_helper_funcs);
c8afe684	203
e4563f6b	204	ret = drm_fb_helper_init(dev, helper, priv->num_connectors);
c8afe684 RC	205	if (ret) {
	206	dev_err(dev->dev, "could not init fbdev: ret=%d\n", ret);
	207	goto fail;
	208	}
	209
01934c2a TR	210	ret = drm_fb_helper_single_add_all_connectors(helper);
	211	if (ret)
	212	goto fini;
c8afe684	213
01934c2a TR	214	ret = drm_fb_helper_initial_config(helper, 32);
	215	if (ret)
	216	goto fini;
c8afe684 RC	217
	218	priv->fbdev = helper;
	219
	220	return helper;
	221
01934c2a TR	222	fini:
01934c2a TR	223	drm_fb_helper_fini(helper);
c8afe684 RC	224	fail:
	225	kfree(fbdev);
	226	return NULL;
	227	}
	228
	229	void msm_fbdev_free(struct drm_device *dev)
	230	{
	231	struct msm_drm_private *priv = dev->dev_private;
	232	struct drm_fb_helper *helper = priv->fbdev;
	233	struct msm_fbdev *fbdev;
c8afe684 RC	234
	235	DBG();
	236
778014f0	237	drm_fb_helper_unregister_fbi(helper);
c8afe684 RC	238
	239	drm_fb_helper_fini(helper);
	240
	241	fbdev = to_msm_fbdev(priv->fbdev);
	242
	243	/* this will free the backing object */
	244	if (fbdev->fb) {
18f23049	245	msm_gem_put_vaddr(fbdev->bo);
c8afe684 RC	246	drm_framebuffer_remove(fbdev->fb);
	247	}
	248
	249	kfree(fbdev);
	250
	251	priv->fbdev = NULL;
	252	}