[mirror_ubuntu-jammy-kernel.git] / drivers / char / drm / r128_ioc32.c

/**
 * \file r128_ioc32.c
 *
 * 32-bit ioctl compatibility routines for the R128 DRM.
 *
 * \author Dave Airlie <airlied@linux.ie> with code from patches by Egbert Eich
 *
 * Copyright (C) Paul Mackerras 2005
 * Copyright (C) Egbert Eich 2003,2004
 * Copyright (C) Dave Airlie 2005
 * 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, sublicense,
 * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHOR 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 <linux/compat.h>
#include <linux/ioctl32.h>

#include "drmP.h"
#include "drm.h"
#include "r128_drm.h"

typedef struct drm_r128_init32 {
	int func;
	unsigned int sarea_priv_offset;
	int is_pci;
	int cce_mode;
	int cce_secure;
	int ring_size;
	int usec_timeout;

	unsigned int fb_bpp;
	unsigned int front_offset, front_pitch;
	unsigned int back_offset, back_pitch;
	unsigned int depth_bpp;
	unsigned int depth_offset, depth_pitch;
	unsigned int span_offset;

	unsigned int fb_offset;
	unsigned int mmio_offset;
	unsigned int ring_offset;
	unsigned int ring_rptr_offset;
	unsigned int buffers_offset;
	unsigned int agp_textures_offset;
} drm_r128_init32_t;

static int compat_r128_init(struct file *file, unsigned int cmd,
			    unsigned long arg)
{
	drm_r128_init32_t init32;
	drm_r128_init_t __user *init;

	if (copy_from_user(&init32, (void __user *)arg, sizeof(init32)))
		return -EFAULT;

	init = compat_alloc_user_space(sizeof(*init));
	if (!access_ok(VERIFY_WRITE, init, sizeof(*init))
	    || __put_user(init32.func, &init->func)
	    || __put_user(init32.sarea_priv_offset, &init->sarea_priv_offset)
	    || __put_user(init32.is_pci, &init->is_pci)
	    || __put_user(init32.cce_mode, &init->cce_mode)
	    || __put_user(init32.cce_secure, &init->cce_secure)
	    || __put_user(init32.ring_size, &init->ring_size)
	    || __put_user(init32.usec_timeout, &init->usec_timeout)
	    || __put_user(init32.fb_bpp, &init->fb_bpp)
	    || __put_user(init32.front_offset, &init->front_offset)
	    || __put_user(init32.front_pitch, &init->front_pitch)
	    || __put_user(init32.back_offset, &init->back_offset)
	    || __put_user(init32.back_pitch, &init->back_pitch)
	    || __put_user(init32.depth_bpp, &init->depth_bpp)
	    || __put_user(init32.depth_offset, &init->depth_offset)
	    || __put_user(init32.depth_pitch, &init->depth_pitch)
	    || __put_user(init32.span_offset, &init->span_offset)
	    || __put_user(init32.fb_offset, &init->fb_offset)
	    || __put_user(init32.mmio_offset, &init->mmio_offset)
	    || __put_user(init32.ring_offset, &init->ring_offset)
	    || __put_user(init32.ring_rptr_offset, &init->ring_rptr_offset)
	    || __put_user(init32.buffers_offset, &init->buffers_offset)
	    || __put_user(init32.agp_textures_offset,
			  &init->agp_textures_offset))
		return -EFAULT;

	return drm_ioctl(file->f_dentry->d_inode, file,
			 DRM_IOCTL_R128_INIT, (unsigned long)init);
}

typedef struct drm_r128_depth32 {
	int func;
	int n;
	u32 x;
	u32 y;
	u32 buffer;
	u32 mask;
} drm_r128_depth32_t;

static int compat_r128_depth(struct file *file, unsigned int cmd,
			     unsigned long arg)
{
	drm_r128_depth32_t depth32;
	drm_r128_depth_t __user *depth;

	if (copy_from_user(&depth32, (void __user *)arg, sizeof(depth32)))
		return -EFAULT;

	depth = compat_alloc_user_space(sizeof(*depth));
	if (!access_ok(VERIFY_WRITE, depth, sizeof(*depth))
	    || __put_user(depth32.func, &depth->func)
	    || __put_user(depth32.n, &depth->n)
	    || __put_user((int __user *)(unsigned long)depth32.x, &depth->x)
	    || __put_user((int __user *)(unsigned long)depth32.y, &depth->y)
	    || __put_user((unsigned int __user *)(unsigned long)depth32.buffer,
			  &depth->buffer)
	    || __put_user((unsigned char __user *)(unsigned long)depth32.mask,
			  &depth->mask))
		return -EFAULT;

	return drm_ioctl(file->f_dentry->d_inode, file,
			 DRM_IOCTL_R128_DEPTH, (unsigned long)depth);

}

typedef struct drm_r128_stipple32 {
	u32 mask;
} drm_r128_stipple32_t;

static int compat_r128_stipple(struct file *file, unsigned int cmd,
			       unsigned long arg)
{
	drm_r128_stipple32_t stipple32;
	drm_r128_stipple_t __user *stipple;

	if (copy_from_user(&stipple32, (void __user *)arg, sizeof(stipple32)))
		return -EFAULT;

	stipple = compat_alloc_user_space(sizeof(*stipple));
	if (!access_ok(VERIFY_WRITE, stipple, sizeof(*stipple))
	    || __put_user((unsigned int __user *)(unsigned long)stipple32.mask,
			  &stipple->mask))
		return -EFAULT;

	return drm_ioctl(file->f_dentry->d_inode, file,
			 DRM_IOCTL_R128_STIPPLE, (unsigned long)stipple);
}

typedef struct drm_r128_getparam32 {
	int param;
	u32 value;
} drm_r128_getparam32_t;

static int compat_r128_getparam(struct file *file, unsigned int cmd,
				unsigned long arg)
{
	drm_r128_getparam32_t getparam32;
	drm_r128_getparam_t __user *getparam;

	if (copy_from_user(&getparam32, (void __user *)arg, sizeof(getparam32)))
		return -EFAULT;

	getparam = compat_alloc_user_space(sizeof(*getparam));
	if (!access_ok(VERIFY_WRITE, getparam, sizeof(*getparam))
	    || __put_user(getparam32.param, &getparam->param)
	    || __put_user((void __user *)(unsigned long)getparam32.value,
			  &getparam->value))
		return -EFAULT;

	return drm_ioctl(file->f_dentry->d_inode, file,
			 DRM_IOCTL_R128_GETPARAM, (unsigned long)getparam);
}

drm_ioctl_compat_t *r128_compat_ioctls[] = {
	[DRM_R128_INIT] = compat_r128_init,
	[DRM_R128_DEPTH] = compat_r128_depth,
	[DRM_R128_STIPPLE] = compat_r128_stipple,
	[DRM_R128_GETPARAM] = compat_r128_getparam,
};

/**
 * Called whenever a 32-bit process running under a 64-bit kernel
 * performs an ioctl on /dev/dri/card<n>.
 *
 * \param filp file pointer.
 * \param cmd command.
 * \param arg user argument.
 * \return zero on success or negative number on failure.
 */
long r128_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
	unsigned int nr = DRM_IOCTL_NR(cmd);
	drm_ioctl_compat_t *fn = NULL;
	int ret;

	if (nr < DRM_COMMAND_BASE)
		return drm_compat_ioctl(filp, cmd, arg);

	if (nr < DRM_COMMAND_BASE + DRM_ARRAY_SIZE(r128_compat_ioctls))
		fn = r128_compat_ioctls[nr - DRM_COMMAND_BASE];

	lock_kernel();		/* XXX for now */
	if (fn != NULL)
		ret = (*fn) (filp, cmd, arg);
	else
		ret = drm_ioctl(filp->f_dentry->d_inode, filp, cmd, arg);
	unlock_kernel();

	return ret;
}
Commit	Line	Data
8ca7c1df DA	1	/**
	2	* \file r128_ioc32.c
	3	*
	4	* 32-bit ioctl compatibility routines for the R128 DRM.
	5	*
	6	* \author Dave Airlie <airlied@linux.ie> with code from patches by Egbert Eich
	7	*
	8	* Copyright (C) Paul Mackerras 2005
	9	* Copyright (C) Egbert Eich 2003,2004
	10	* Copyright (C) Dave Airlie 2005
	11	* All Rights Reserved.
	12	*
	13	* Permission is hereby granted, free of charge, to any person obtaining a
	14	* copy of this software and associated documentation files (the "Software"),
	15	* to deal in the Software without restriction, including without limitation
	16	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	17	* and/or sell copies of the Software, and to permit persons to whom the
	18	* Software is furnished to do so, subject to the following conditions:
	19	*
	20	* The above copyright notice and this permission notice (including the next
	21	* paragraph) shall be included in all copies or substantial portions of the
	22	* Software.
	23	*
	24	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	25	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	26	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	27	* THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
	28	* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	29	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
	30	* IN THE SOFTWARE.
	31	*/
	32	#include <linux/compat.h>
	33	#include <linux/ioctl32.h>
	34
	35	#include "drmP.h"
	36	#include "drm.h"
	37	#include "r128_drm.h"
	38
	39	typedef struct drm_r128_init32 {
	40	int func;
	41	unsigned int sarea_priv_offset;
	42	int is_pci;
	43	int cce_mode;
	44	int cce_secure;
	45	int ring_size;
	46	int usec_timeout;
	47
	48	unsigned int fb_bpp;
	49	unsigned int front_offset, front_pitch;
	50	unsigned int back_offset, back_pitch;
	51	unsigned int depth_bpp;
	52	unsigned int depth_offset, depth_pitch;
	53	unsigned int span_offset;
	54
	55	unsigned int fb_offset;
	56	unsigned int mmio_offset;
	57	unsigned int ring_offset;
	58	unsigned int ring_rptr_offset;
	59	unsigned int buffers_offset;
	60	unsigned int agp_textures_offset;
	61	} drm_r128_init32_t;
	62
	63	static int compat_r128_init(struct file *file, unsigned int cmd,
	64	unsigned long arg)
65	{
66	drm_r128_init32_t init32;
67	drm_r128_init_t __user *init;
b5e89ed5	68
8ca7c1df DA	69	if (copy_from_user(&init32, (void __user *)arg, sizeof(init32)))
8ca7c1df DA	70	return -EFAULT;
b5e89ed5	71
8ca7c1df DA	72	init = compat_alloc_user_space(sizeof(*init));
	73	if (!access_ok(VERIFY_WRITE, init, sizeof(*init))
	74	\|\| __put_user(init32.func, &init->func)
	75	\|\| __put_user(init32.sarea_priv_offset, &init->sarea_priv_offset)
	76	\|\| __put_user(init32.is_pci, &init->is_pci)
	77	\|\| __put_user(init32.cce_mode, &init->cce_mode)
	78	\|\| __put_user(init32.cce_secure, &init->cce_secure)
	79	\|\| __put_user(init32.ring_size, &init->ring_size)
	80	\|\| __put_user(init32.usec_timeout, &init->usec_timeout)
	81	\|\| __put_user(init32.fb_bpp, &init->fb_bpp)
	82	\|\| __put_user(init32.front_offset, &init->front_offset)
	83	\|\| __put_user(init32.front_pitch, &init->front_pitch)
	84	\|\| __put_user(init32.back_offset, &init->back_offset)
	85	\|\| __put_user(init32.back_pitch, &init->back_pitch)
	86	\|\| __put_user(init32.depth_bpp, &init->depth_bpp)
	87	\|\| __put_user(init32.depth_offset, &init->depth_offset)
	88	\|\| __put_user(init32.depth_pitch, &init->depth_pitch)
	89	\|\| __put_user(init32.span_offset, &init->span_offset)
	90	\|\| __put_user(init32.fb_offset, &init->fb_offset)
	91	\|\| __put_user(init32.mmio_offset, &init->mmio_offset)
	92	\|\| __put_user(init32.ring_offset, &init->ring_offset)
	93	\|\| __put_user(init32.ring_rptr_offset, &init->ring_rptr_offset)
	94	\|\| __put_user(init32.buffers_offset, &init->buffers_offset)
b5e89ed5 DA	95	\|\| __put_user(init32.agp_textures_offset,
b5e89ed5 DA	96	&init->agp_textures_offset))
8ca7c1df	97	return -EFAULT;
b5e89ed5	98
8ca7c1df DA	99	return drm_ioctl(file->f_dentry->d_inode, file,
	100	DRM_IOCTL_R128_INIT, (unsigned long)init);
	101	}
	102
8ca7c1df DA	103	typedef struct drm_r128_depth32 {
	104	int func;
	105	int n;
	106	u32 x;
	107	u32 y;
	108	u32 buffer;
	109	u32 mask;
	110	} drm_r128_depth32_t;
	111
	112	static int compat_r128_depth(struct file *file, unsigned int cmd,
	113	unsigned long arg)
	114	{
	115	drm_r128_depth32_t depth32;
	116	drm_r128_depth_t __user *depth;
	117
	118	if (copy_from_user(&depth32, (void __user *)arg, sizeof(depth32)))
	119	return -EFAULT;
	120
	121	depth = compat_alloc_user_space(sizeof(*depth));
	122	if (!access_ok(VERIFY_WRITE, depth, sizeof(*depth))
	123	\|\| __put_user(depth32.func, &depth->func)
	124	\|\| __put_user(depth32.n, &depth->n)
	125	\|\| __put_user((int __user *)(unsigned long)depth32.x, &depth->x)
	126	\|\| __put_user((int __user *)(unsigned long)depth32.y, &depth->y)
b5e89ed5 DA	127	\|\| __put_user((unsigned int __user *)(unsigned long)depth32.buffer,
	128	&depth->buffer)
	129	\|\| __put_user((unsigned char __user *)(unsigned long)depth32.mask,
	130	&depth->mask))
8ca7c1df	131	return -EFAULT;
b5e89ed5	132
8ca7c1df	133	return drm_ioctl(file->f_dentry->d_inode, file,
b5e89ed5 DA	134	DRM_IOCTL_R128_DEPTH, (unsigned long)depth);
b5e89ed5 DA	135
8ca7c1df DA	136	}
	137
	138	typedef struct drm_r128_stipple32 {
	139	u32 mask;
	140	} drm_r128_stipple32_t;
	141
	142	static int compat_r128_stipple(struct file *file, unsigned int cmd,
	143	unsigned long arg)
	144	{
	145	drm_r128_stipple32_t stipple32;
	146	drm_r128_stipple_t __user *stipple;
	147
	148	if (copy_from_user(&stipple32, (void __user *)arg, sizeof(stipple32)))
	149	return -EFAULT;
	150
	151	stipple = compat_alloc_user_space(sizeof(*stipple));
	152	if (!access_ok(VERIFY_WRITE, stipple, sizeof(*stipple))
b5e89ed5 DA	153	\|\| __put_user((unsigned int __user *)(unsigned long)stipple32.mask,
b5e89ed5 DA	154	&stipple->mask))
8ca7c1df DA	155	return -EFAULT;
	156
	157	return drm_ioctl(file->f_dentry->d_inode, file,
	158	DRM_IOCTL_R128_STIPPLE, (unsigned long)stipple);
	159	}
	160
	161	typedef struct drm_r128_getparam32 {
	162	int param;
	163	u32 value;
	164	} drm_r128_getparam32_t;
	165
	166	static int compat_r128_getparam(struct file *file, unsigned int cmd,
	167	unsigned long arg)
	168	{
	169	drm_r128_getparam32_t getparam32;
	170	drm_r128_getparam_t __user *getparam;
	171
	172	if (copy_from_user(&getparam32, (void __user *)arg, sizeof(getparam32)))
	173	return -EFAULT;
	174
	175	getparam = compat_alloc_user_space(sizeof(*getparam));
	176	if (!access_ok(VERIFY_WRITE, getparam, sizeof(*getparam))
	177	\|\| __put_user(getparam32.param, &getparam->param)
b5e89ed5 DA	178	\|\| __put_user((void __user *)(unsigned long)getparam32.value,
b5e89ed5 DA	179	&getparam->value))
8ca7c1df	180	return -EFAULT;
b5e89ed5	181
8ca7c1df DA	182	return drm_ioctl(file->f_dentry->d_inode, file,
	183	DRM_IOCTL_R128_GETPARAM, (unsigned long)getparam);
	184	}
	185
	186	drm_ioctl_compat_t *r128_compat_ioctls[] = {
	187	[DRM_R128_INIT] = compat_r128_init,
	188	[DRM_R128_DEPTH] = compat_r128_depth,
	189	[DRM_R128_STIPPLE] = compat_r128_stipple,
	190	[DRM_R128_GETPARAM] = compat_r128_getparam,
	191	};
	192
	193	/**
	194	* Called whenever a 32-bit process running under a 64-bit kernel
	195	* performs an ioctl on /dev/dri/card<n>.
	196	*
	197	* \param filp file pointer.
	198	* \param cmd command.
	199	* \param arg user argument.
	200	* \return zero on success or negative number on failure.
	201	*/
b5e89ed5	202	long r128_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
8ca7c1df DA	203	{
	204	unsigned int nr = DRM_IOCTL_NR(cmd);
	205	drm_ioctl_compat_t *fn = NULL;
	206	int ret;
	207
	208	if (nr < DRM_COMMAND_BASE)
	209	return drm_compat_ioctl(filp, cmd, arg);
	210
	211	if (nr < DRM_COMMAND_BASE + DRM_ARRAY_SIZE(r128_compat_ioctls))
	212	fn = r128_compat_ioctls[nr - DRM_COMMAND_BASE];
	213
	214	lock_kernel(); /* XXX for now */
	215	if (fn != NULL)
b5e89ed5	216	ret = (*fn) (filp, cmd, arg);
8ca7c1df DA	217	else
	218	ret = drm_ioctl(filp->f_dentry->d_inode, filp, cmd, arg);
	219	unlock_kernel();
	220
	221	return ret;
	222	}