[deliverable/linux.git] / drivers / gpu / drm / vmwgfx / vmwgfx_ioctl.c

/**************************************************************************
 *
 * Copyright © 2009 VMware, Inc., Palo Alto, CA., USA
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 * USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 **************************************************************************/

#include "vmwgfx_drv.h"
#include <drm/vmwgfx_drm.h>
#include "vmwgfx_kms.h"

int vmw_getparam_ioctl(struct drm_device *dev, void *data,
		       struct drm_file *file_priv)
{
	struct vmw_private *dev_priv = vmw_priv(dev);
	struct drm_vmw_getparam_arg *param =
	    (struct drm_vmw_getparam_arg *)data;

	switch (param->param) {
	case DRM_VMW_PARAM_NUM_STREAMS:
		param->value = vmw_overlay_num_overlays(dev_priv);
		break;
	case DRM_VMW_PARAM_NUM_FREE_STREAMS:
		param->value = vmw_overlay_num_free_overlays(dev_priv);
		break;
	case DRM_VMW_PARAM_3D:
		param->value = vmw_fifo_have_3d(dev_priv) ? 1 : 0;
		break;
	case DRM_VMW_PARAM_HW_CAPS:
		param->value = dev_priv->capabilities;
		break;
	case DRM_VMW_PARAM_FIFO_CAPS:
		param->value = dev_priv->fifo.capabilities;
		break;
	case DRM_VMW_PARAM_MAX_FB_SIZE:
		param->value = dev_priv->prim_bb_mem;
		break;
	case DRM_VMW_PARAM_FIFO_HW_VERSION:
	{
		__le32 __iomem *fifo_mem = dev_priv->mmio_virt;
		const struct vmw_fifo_state *fifo = &dev_priv->fifo;

		param->value =
			ioread32(fifo_mem +
				 ((fifo->capabilities &
				   SVGA_FIFO_CAP_3D_HWVERSION_REVISED) ?
				  SVGA_FIFO_3D_HWVERSION_REVISED :
				  SVGA_FIFO_3D_HWVERSION));
		break;
	}
	case DRM_VMW_PARAM_MAX_SURF_MEMORY:
		param->value = dev_priv->memory_size;
		break;
	case DRM_VMW_PARAM_3D_CAPS_SIZE:
		if (dev_priv->capabilities & SVGA_CAP_GBOBJECTS)
			param->value = SVGA3D_DEVCAP_MAX;
		else
			param->value = (SVGA_FIFO_3D_CAPS_LAST -
					SVGA_FIFO_3D_CAPS + 1);
		param->value *= sizeof(uint32_t);
		break;
	case DRM_VMW_PARAM_MAX_MOB_MEMORY:
		param->value = dev_priv->max_mob_pages * PAGE_SIZE;
		break;
	default:
		DRM_ERROR("Illegal vmwgfx get param request: %d\n",
			  param->param);
		return -EINVAL;
	}

	return 0;
}


int vmw_get_cap_3d_ioctl(struct drm_device *dev, void *data,
			 struct drm_file *file_priv)
{
	struct drm_vmw_get_3d_cap_arg *arg =
		(struct drm_vmw_get_3d_cap_arg *) data;
	struct vmw_private *dev_priv = vmw_priv(dev);
	uint32_t size;
	__le32 __iomem *fifo_mem;
	void __user *buffer = (void __user *)((unsigned long)(arg->buffer));
	void *bounce;
	int ret;
	bool gb_objects = !!(dev_priv->capabilities & SVGA_CAP_GBOBJECTS);

	if (unlikely(arg->pad64 != 0)) {
		DRM_ERROR("Illegal GET_3D_CAP argument.\n");
		return -EINVAL;
	}

	if (gb_objects)
		size = SVGA3D_DEVCAP_MAX;
	else
		size = (SVGA_FIFO_3D_CAPS_LAST - SVGA_FIFO_3D_CAPS + 1);

	size *= sizeof(uint32_t);

	if (arg->max_size < size)
		size = arg->max_size;

	bounce = vmalloc(size);
	if (unlikely(bounce == NULL)) {
		DRM_ERROR("Failed to allocate bounce buffer for 3D caps.\n");
		return -ENOMEM;
	}

	if (gb_objects) {
		int i;
		uint32_t *bounce32 = (uint32_t *) bounce;

		mutex_lock(&dev_priv->hw_mutex);
		for (i = 0; i < SVGA3D_DEVCAP_MAX; ++i) {
			vmw_write(dev_priv, SVGA_REG_DEV_CAP, i);
			*bounce32++ = vmw_read(dev_priv, SVGA_REG_DEV_CAP);
		}
		mutex_unlock(&dev_priv->hw_mutex);

	} else {

		fifo_mem = dev_priv->mmio_virt;
		memcpy_fromio(bounce, &fifo_mem[SVGA_FIFO_3D_CAPS], size);
	}

	ret = copy_to_user(buffer, bounce, size);
	if (ret)
		ret = -EFAULT;
	vfree(bounce);

	if (unlikely(ret != 0))
		DRM_ERROR("Failed to report 3D caps info.\n");

	return ret;
}

int vmw_present_ioctl(struct drm_device *dev, void *data,
		      struct drm_file *file_priv)
{
	struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
	struct vmw_private *dev_priv = vmw_priv(dev);
	struct drm_vmw_present_arg *arg =
		(struct drm_vmw_present_arg *)data;
	struct vmw_surface *surface;
	struct vmw_master *vmaster = vmw_master(file_priv->master);
	struct drm_vmw_rect __user *clips_ptr;
	struct drm_vmw_rect *clips = NULL;
	struct drm_framebuffer *fb;
	struct vmw_framebuffer *vfb;
	struct vmw_resource *res;
	uint32_t num_clips;
	int ret;

	num_clips = arg->num_clips;
	clips_ptr = (struct drm_vmw_rect *)(unsigned long)arg->clips_ptr;

	if (unlikely(num_clips == 0))
		return 0;

	if (clips_ptr == NULL) {
		DRM_ERROR("Variable clips_ptr must be specified.\n");
		ret = -EINVAL;
		goto out_clips;
	}

	clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
	if (clips == NULL) {
		DRM_ERROR("Failed to allocate clip rect list.\n");
		ret = -ENOMEM;
		goto out_clips;
	}

	ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips));
	if (ret) {
		DRM_ERROR("Failed to copy clip rects from userspace.\n");
		ret = -EFAULT;
		goto out_no_copy;
	}

	drm_modeset_lock_all(dev);

	fb = drm_framebuffer_lookup(dev, arg->fb_id);
	if (!fb) {
		DRM_ERROR("Invalid framebuffer id.\n");
		ret = -ENOENT;
		goto out_no_fb;
	}
	vfb = vmw_framebuffer_to_vfb(fb);

	ret = ttm_read_lock(&vmaster->lock, true);
	if (unlikely(ret != 0))
		goto out_no_ttm_lock;

	ret = vmw_user_resource_lookup_handle(dev_priv, tfile, arg->sid,
					      user_surface_converter,
					      &res);
	if (ret)
		goto out_no_surface;

	surface = vmw_res_to_srf(res);
	ret = vmw_kms_present(dev_priv, file_priv,
			      vfb, surface, arg->sid,
			      arg->dest_x, arg->dest_y,
			      clips, num_clips);

	/* vmw_user_surface_lookup takes one ref so does new_fb */
	vmw_surface_unreference(&surface);

out_no_surface:
	ttm_read_unlock(&vmaster->lock);
out_no_ttm_lock:
	drm_framebuffer_unreference(fb);
out_no_fb:
	drm_modeset_unlock_all(dev);
out_no_copy:
	kfree(clips);
out_clips:
	return ret;
}

int vmw_present_readback_ioctl(struct drm_device *dev, void *data,
			       struct drm_file *file_priv)
{
	struct vmw_private *dev_priv = vmw_priv(dev);
	struct drm_vmw_present_readback_arg *arg =
		(struct drm_vmw_present_readback_arg *)data;
	struct drm_vmw_fence_rep __user *user_fence_rep =
		(struct drm_vmw_fence_rep __user *)
		(unsigned long)arg->fence_rep;
	struct vmw_master *vmaster = vmw_master(file_priv->master);
	struct drm_vmw_rect __user *clips_ptr;
	struct drm_vmw_rect *clips = NULL;
	struct drm_framebuffer *fb;
	struct vmw_framebuffer *vfb;
	uint32_t num_clips;
	int ret;

	num_clips = arg->num_clips;
	clips_ptr = (struct drm_vmw_rect *)(unsigned long)arg->clips_ptr;

	if (unlikely(num_clips == 0))
		return 0;

	if (clips_ptr == NULL) {
		DRM_ERROR("Argument clips_ptr must be specified.\n");
		ret = -EINVAL;
		goto out_clips;
	}

	clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
	if (clips == NULL) {
		DRM_ERROR("Failed to allocate clip rect list.\n");
		ret = -ENOMEM;
		goto out_clips;
	}

	ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips));
	if (ret) {
		DRM_ERROR("Failed to copy clip rects from userspace.\n");
		ret = -EFAULT;
		goto out_no_copy;
	}

	drm_modeset_lock_all(dev);

	fb = drm_framebuffer_lookup(dev, arg->fb_id);
	if (!fb) {
		DRM_ERROR("Invalid framebuffer id.\n");
		ret = -ENOENT;
		goto out_no_fb;
	}

	vfb = vmw_framebuffer_to_vfb(fb);
	if (!vfb->dmabuf) {
		DRM_ERROR("Framebuffer not dmabuf backed.\n");
		ret = -EINVAL;
		goto out_no_ttm_lock;
	}

	ret = ttm_read_lock(&vmaster->lock, true);
	if (unlikely(ret != 0))
		goto out_no_ttm_lock;

	ret = vmw_kms_readback(dev_priv, file_priv,
			       vfb, user_fence_rep,
			       clips, num_clips);

	ttm_read_unlock(&vmaster->lock);
out_no_ttm_lock:
	drm_framebuffer_unreference(fb);
out_no_fb:
	drm_modeset_unlock_all(dev);
out_no_copy:
	kfree(clips);
out_clips:
	return ret;
}


/**
 * vmw_fops_poll - wrapper around the drm_poll function
 *
 * @filp: See the linux fops poll documentation.
 * @wait: See the linux fops poll documentation.
 *
 * Wrapper around the drm_poll function that makes sure the device is
 * processing the fifo if drm_poll decides to wait.
 */
unsigned int vmw_fops_poll(struct file *filp, struct poll_table_struct *wait)
{
	struct drm_file *file_priv = filp->private_data;
	struct vmw_private *dev_priv =
		vmw_priv(file_priv->minor->dev);

	vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
	return drm_poll(filp, wait);
}


/**
 * vmw_fops_read - wrapper around the drm_read function
 *
 * @filp: See the linux fops read documentation.
 * @buffer: See the linux fops read documentation.
 * @count: See the linux fops read documentation.
 * offset: See the linux fops read documentation.
 *
 * Wrapper around the drm_read function that makes sure the device is
 * processing the fifo if drm_read decides to wait.
 */
ssize_t vmw_fops_read(struct file *filp, char __user *buffer,
		      size_t count, loff_t *offset)
{
	struct drm_file *file_priv = filp->private_data;
	struct vmw_private *dev_priv =
		vmw_priv(file_priv->minor->dev);

	vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
	return drm_read(filp, buffer, count, offset);
}
Commit	Line	Data
fb1d9738 JB	1	/**************************************************************************
	2	*
	3	* Copyright © 2009 VMware, Inc., Palo Alto, CA., USA
	4	* All Rights Reserved.
	5	*
	6	* Permission is hereby granted, free of charge, to any person obtaining a
	7	* copy of this software and associated documentation files (the
	8	* "Software"), to deal in the Software without restriction, including
	9	* without limitation the rights to use, copy, modify, merge, publish,
	10	* distribute, sub license, and/or sell copies of the Software, and to
	11	* permit persons to whom the Software is furnished to do so, subject to
	12	* the following conditions:
	13	*
	14	* The above copyright notice and this permission notice (including the
	15	* next paragraph) shall be included in all copies or substantial portions
	16	* of the Software.
	17	*
	18	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	19	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	20	* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
	21	* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
	22	* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
	23	* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
	24	* USE OR OTHER DEALINGS IN THE SOFTWARE.
	25	*
	26	**************************************************************************/
	27
	28	#include "vmwgfx_drv.h"
760285e7	29	#include <drm/vmwgfx_drm.h>
2fcd5a73	30	#include "vmwgfx_kms.h"
fb1d9738 JB	31
	32	int vmw_getparam_ioctl(struct drm_device dev, void data,
	33	struct drm_file *file_priv)
	34	{
	35	struct vmw_private *dev_priv = vmw_priv(dev);
	36	struct drm_vmw_getparam_arg *param =
	37	(struct drm_vmw_getparam_arg *)data;
	38
	39	switch (param->param) {
	40	case DRM_VMW_PARAM_NUM_STREAMS:
	41	param->value = vmw_overlay_num_overlays(dev_priv);
	42	break;
	43	case DRM_VMW_PARAM_NUM_FREE_STREAMS:
	44	param->value = vmw_overlay_num_free_overlays(dev_priv);
	45	break;
	46	case DRM_VMW_PARAM_3D:
8e19a951	47	param->value = vmw_fifo_have_3d(dev_priv) ? 1 : 0;
fb1d9738	48	break;
f77cef3d TH	49	case DRM_VMW_PARAM_HW_CAPS:
	50	param->value = dev_priv->capabilities;
	51	break;
	52	case DRM_VMW_PARAM_FIFO_CAPS:
	53	param->value = dev_priv->fifo.capabilities;
	54	break;
30f47fc8	55	case DRM_VMW_PARAM_MAX_FB_SIZE:
bc2d6508	56	param->value = dev_priv->prim_bb_mem;
30f47fc8	57	break;
f63f6a59 TH	58	case DRM_VMW_PARAM_FIFO_HW_VERSION:
	59	{
	60	__le32 __iomem *fifo_mem = dev_priv->mmio_virt;
ebd4c6f6	61	const struct vmw_fifo_state *fifo = &dev_priv->fifo;
f63f6a59	62
ebd4c6f6 TH	63	param->value =
	64	ioread32(fifo_mem +
	65	((fifo->capabilities &
	66	SVGA_FIFO_CAP_3D_HWVERSION_REVISED) ?
	67	SVGA_FIFO_3D_HWVERSION_REVISED :
	68	SVGA_FIFO_3D_HWVERSION));
f63f6a59 TH	69	break;
f63f6a59 TH	70	}
716a2fd6 TH	71	case DRM_VMW_PARAM_MAX_SURF_MEMORY:
	72	param->value = dev_priv->memory_size;
	73	break;
	74	case DRM_VMW_PARAM_3D_CAPS_SIZE:
	75	if (dev_priv->capabilities & SVGA_CAP_GBOBJECTS)
	76	param->value = SVGA3D_DEVCAP_MAX;
	77	else
	78	param->value = (SVGA_FIFO_3D_CAPS_LAST -
	79	SVGA_FIFO_3D_CAPS + 1);
	80	param->value *= sizeof(uint32_t);
	81	break;
311474db TH	82	case DRM_VMW_PARAM_MAX_MOB_MEMORY:
	83	param->value = dev_priv->max_mob_pages * PAGE_SIZE;
	84	break;
fb1d9738 JB	85	default:
	86	DRM_ERROR("Illegal vmwgfx get param request: %d\n",
	87	param->param);
	88	return -EINVAL;
	89	}
	90
	91	return 0;
	92	}
f63f6a59 TH	93
	94
	95	int vmw_get_cap_3d_ioctl(struct drm_device dev, void data,
	96	struct drm_file *file_priv)
	97	{
	98	struct drm_vmw_get_3d_cap_arg *arg =
	99	(struct drm_vmw_get_3d_cap_arg *) data;
	100	struct vmw_private *dev_priv = vmw_priv(dev);
	101	uint32_t size;
	102	__le32 __iomem *fifo_mem;
	103	void __user buffer = (void __user )((unsigned long)(arg->buffer));
	104	void *bounce;
	105	int ret;
716a2fd6	106	bool gb_objects = !!(dev_priv->capabilities & SVGA_CAP_GBOBJECTS);
f63f6a59 TH	107
	108	if (unlikely(arg->pad64 != 0)) {
	109	DRM_ERROR("Illegal GET_3D_CAP argument.\n");
	110	return -EINVAL;
	111	}
	112
716a2fd6 TH	113	if (gb_objects)
	114	size = SVGA3D_DEVCAP_MAX;
	115	else
	116	size = (SVGA_FIFO_3D_CAPS_LAST - SVGA_FIFO_3D_CAPS + 1);
	117
	118	size *= sizeof(uint32_t);
f63f6a59 TH	119
	120	if (arg->max_size < size)
	121	size = arg->max_size;
	122
	123	bounce = vmalloc(size);
	124	if (unlikely(bounce == NULL)) {
	125	DRM_ERROR("Failed to allocate bounce buffer for 3D caps.\n");
	126	return -ENOMEM;
	127	}
	128
716a2fd6 TH	129	if (gb_objects) {
	130	int i;
	131	uint32_t bounce32 = (uint32_t ) bounce;
	132
	133	mutex_lock(&dev_priv->hw_mutex);
	134	for (i = 0; i < SVGA3D_DEVCAP_MAX; ++i) {
	135	vmw_write(dev_priv, SVGA_REG_DEV_CAP, i);
	136	*bounce32++ = vmw_read(dev_priv, SVGA_REG_DEV_CAP);
	137	}
	138	mutex_unlock(&dev_priv->hw_mutex);
	139
	140	} else {
	141
	142	fifo_mem = dev_priv->mmio_virt;
	143	memcpy_fromio(bounce, &fifo_mem[SVGA_FIFO_3D_CAPS], size);
	144	}
f63f6a59 TH	145
f63f6a59 TH	146	ret = copy_to_user(buffer, bounce, size);
888155bb DC	147	if (ret)
888155bb DC	148	ret = -EFAULT;
f63f6a59 TH	149	vfree(bounce);
	150
	151	if (unlikely(ret != 0))
	152	DRM_ERROR("Failed to report 3D caps info.\n");
	153
	154	return ret;
	155	}
2fcd5a73 JB	156
	157	int vmw_present_ioctl(struct drm_device dev, void data,
	158	struct drm_file *file_priv)
	159	{
	160	struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
	161	struct vmw_private *dev_priv = vmw_priv(dev);
	162	struct drm_vmw_present_arg *arg =
	163	(struct drm_vmw_present_arg *)data;
	164	struct vmw_surface *surface;
	165	struct vmw_master *vmaster = vmw_master(file_priv->master);
	166	struct drm_vmw_rect __user *clips_ptr;
	167	struct drm_vmw_rect *clips = NULL;
786b99ed	168	struct drm_framebuffer *fb;
2fcd5a73	169	struct vmw_framebuffer *vfb;
c0951b79	170	struct vmw_resource *res;
2fcd5a73 JB	171	uint32_t num_clips;
	172	int ret;
	173
	174	num_clips = arg->num_clips;
	175	clips_ptr = (struct drm_vmw_rect *)(unsigned long)arg->clips_ptr;
	176
	177	if (unlikely(num_clips == 0))
	178	return 0;
	179
	180	if (clips_ptr == NULL) {
	181	DRM_ERROR("Variable clips_ptr must be specified.\n");
	182	ret = -EINVAL;
	183	goto out_clips;
	184	}
	185
24bb5a0c	186	clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
2fcd5a73 JB	187	if (clips == NULL) {
	188	DRM_ERROR("Failed to allocate clip rect list.\n");
	189	ret = -ENOMEM;
	190	goto out_clips;
	191	}
	192
	193	ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips));
	194	if (ret) {
	195	DRM_ERROR("Failed to copy clip rects from userspace.\n");
d2c184fb	196	ret = -EFAULT;
2fcd5a73 JB	197	goto out_no_copy;
	198	}
	199
bbe4b99f	200	drm_modeset_lock_all(dev);
2fcd5a73	201
786b99ed DV	202	fb = drm_framebuffer_lookup(dev, arg->fb_id);
786b99ed DV	203	if (!fb) {
2fcd5a73	204	DRM_ERROR("Invalid framebuffer id.\n");
43789b9e	205	ret = -ENOENT;
2fcd5a73 JB	206	goto out_no_fb;
2fcd5a73 JB	207	}
786b99ed	208	vfb = vmw_framebuffer_to_vfb(fb);
2fcd5a73 JB	209
	210	ret = ttm_read_lock(&vmaster->lock, true);
	211	if (unlikely(ret != 0))
	212	goto out_no_ttm_lock;
	213
c0951b79 TH	214	ret = vmw_user_resource_lookup_handle(dev_priv, tfile, arg->sid,
	215	user_surface_converter,
	216	&res);
2fcd5a73 JB	217	if (ret)
	218	goto out_no_surface;
	219
c0951b79	220	surface = vmw_res_to_srf(res);
2fcd5a73 JB	221	ret = vmw_kms_present(dev_priv, file_priv,
	222	vfb, surface, arg->sid,
	223	arg->dest_x, arg->dest_y,
	224	clips, num_clips);
	225
	226	/* vmw_user_surface_lookup takes one ref so does new_fb */
	227	vmw_surface_unreference(&surface);
	228
	229	out_no_surface:
	230	ttm_read_unlock(&vmaster->lock);
	231	out_no_ttm_lock:
2fd5eaba	232	drm_framebuffer_unreference(fb);
2fcd5a73	233	out_no_fb:
bbe4b99f	234	drm_modeset_unlock_all(dev);
2fcd5a73 JB	235	out_no_copy:
	236	kfree(clips);
	237	out_clips:
	238	return ret;
	239	}
	240
	241	int vmw_present_readback_ioctl(struct drm_device dev, void data,
	242	struct drm_file *file_priv)
	243	{
	244	struct vmw_private *dev_priv = vmw_priv(dev);
	245	struct drm_vmw_present_readback_arg *arg =
	246	(struct drm_vmw_present_readback_arg *)data;
	247	struct drm_vmw_fence_rep __user *user_fence_rep =
	248	(struct drm_vmw_fence_rep __user *)
	249	(unsigned long)arg->fence_rep;
	250	struct vmw_master *vmaster = vmw_master(file_priv->master);
	251	struct drm_vmw_rect __user *clips_ptr;
	252	struct drm_vmw_rect *clips = NULL;
786b99ed	253	struct drm_framebuffer *fb;
2fcd5a73 JB	254	struct vmw_framebuffer *vfb;
	255	uint32_t num_clips;
	256	int ret;
	257
	258	num_clips = arg->num_clips;
	259	clips_ptr = (struct drm_vmw_rect *)(unsigned long)arg->clips_ptr;
	260
	261	if (unlikely(num_clips == 0))
	262	return 0;
	263
	264	if (clips_ptr == NULL) {
	265	DRM_ERROR("Argument clips_ptr must be specified.\n");
	266	ret = -EINVAL;
	267	goto out_clips;
	268	}
	269
24bb5a0c	270	clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
2fcd5a73 JB	271	if (clips == NULL) {
	272	DRM_ERROR("Failed to allocate clip rect list.\n");
	273	ret = -ENOMEM;
	274	goto out_clips;
	275	}
	276
	277	ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips));
	278	if (ret) {
	279	DRM_ERROR("Failed to copy clip rects from userspace.\n");
d2c184fb	280	ret = -EFAULT;
2fcd5a73 JB	281	goto out_no_copy;
	282	}
	283
bbe4b99f	284	drm_modeset_lock_all(dev);
2fcd5a73	285
786b99ed DV	286	fb = drm_framebuffer_lookup(dev, arg->fb_id);
786b99ed DV	287	if (!fb) {
2fcd5a73	288	DRM_ERROR("Invalid framebuffer id.\n");
43789b9e	289	ret = -ENOENT;
2fcd5a73 JB	290	goto out_no_fb;
	291	}
	292
786b99ed	293	vfb = vmw_framebuffer_to_vfb(fb);
2fcd5a73 JB	294	if (!vfb->dmabuf) {
	295	DRM_ERROR("Framebuffer not dmabuf backed.\n");
	296	ret = -EINVAL;
2fd5eaba	297	goto out_no_ttm_lock;
2fcd5a73 JB	298	}
	299
	300	ret = ttm_read_lock(&vmaster->lock, true);
	301	if (unlikely(ret != 0))
	302	goto out_no_ttm_lock;
	303
	304	ret = vmw_kms_readback(dev_priv, file_priv,
	305	vfb, user_fence_rep,
	306	clips, num_clips);
	307
	308	ttm_read_unlock(&vmaster->lock);
	309	out_no_ttm_lock:
2fd5eaba	310	drm_framebuffer_unreference(fb);
2fcd5a73	311	out_no_fb:
bbe4b99f	312	drm_modeset_unlock_all(dev);
2fcd5a73 JB	313	out_no_copy:
	314	kfree(clips);
	315	out_clips:
	316	return ret;
	317	}
5438ae88 TH	318
	319
	320	/**
	321	* vmw_fops_poll - wrapper around the drm_poll function
	322	*
	323	* @filp: See the linux fops poll documentation.
	324	* @wait: See the linux fops poll documentation.
	325	*
	326	* Wrapper around the drm_poll function that makes sure the device is
	327	* processing the fifo if drm_poll decides to wait.
	328	*/
	329	unsigned int vmw_fops_poll(struct file filp, struct poll_table_struct wait)
	330	{
	331	struct drm_file *file_priv = filp->private_data;
	332	struct vmw_private *dev_priv =
	333	vmw_priv(file_priv->minor->dev);
	334
	335	vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
	336	return drm_poll(filp, wait);
	337	}
	338
	339
	340	/**
	341	* vmw_fops_read - wrapper around the drm_read function
	342	*
	343	* @filp: See the linux fops read documentation.
	344	* @buffer: See the linux fops read documentation.
	345	* @count: See the linux fops read documentation.
	346	* offset: See the linux fops read documentation.
	347	*
	348	* Wrapper around the drm_read function that makes sure the device is
	349	* processing the fifo if drm_read decides to wait.
	350	*/
	351	ssize_t vmw_fops_read(struct file filp, char __user buffer,
	352	size_t count, loff_t *offset)
	353	{
	354	struct drm_file *file_priv = filp->private_data;
	355	struct vmw_private *dev_priv =
	356	vmw_priv(file_priv->minor->dev);
	357
	358	vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
	359	return drm_read(filp, buffer, count, offset);
	360	}