[linux-2.6-block.git] / drivers / char / drm / i915_ioc32.c

/**
 * \file i915_ioc32.c
 *
 * 32-bit ioctl compatibility routines for the i915 DRM.
 *
 * \author Alan Hourihane <alanh@fairlite.demon.co.uk>
 *
 *
 * Copyright (C) Paul Mackerras 2005
 * Copyright (C) Alan Hourihane 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 "drmP.h"
#include "drm.h"
#include "i915_drm.h"

typedef struct _drm_i915_batchbuffer32 {
	int start;		/* agp offset */
	int used;		/* nr bytes in use */
	int DR1;		/* hw flags for GFX_OP_DRAWRECT_INFO */
	int DR4;		/* window origin for GFX_OP_DRAWRECT_INFO */
	int num_cliprects;	/* mulitpass with multiple cliprects? */
	u32 cliprects;		/* pointer to userspace cliprects */
} drm_i915_batchbuffer32_t;

static int compat_i915_batchbuffer(struct file *file, unsigned int cmd,
				   unsigned long arg)
{
	drm_i915_batchbuffer32_t batchbuffer32;
	drm_i915_batchbuffer_t __user *batchbuffer;

	if (copy_from_user
	    (&batchbuffer32, (void __user *)arg, sizeof(batchbuffer32)))
		return -EFAULT;

	batchbuffer = compat_alloc_user_space(sizeof(*batchbuffer));
	if (!access_ok(VERIFY_WRITE, batchbuffer, sizeof(*batchbuffer))
	    || __put_user(batchbuffer32.start, &batchbuffer->start)
	    || __put_user(batchbuffer32.used, &batchbuffer->used)
	    || __put_user(batchbuffer32.DR1, &batchbuffer->DR1)
	    || __put_user(batchbuffer32.DR4, &batchbuffer->DR4)
	    || __put_user(batchbuffer32.num_cliprects,
			  &batchbuffer->num_cliprects)
	    || __put_user((int __user *)(unsigned long)batchbuffer32.cliprects,
			  &batchbuffer->cliprects))
		return -EFAULT;

	return drm_ioctl(file->f_path.dentry->d_inode, file,
			 DRM_IOCTL_I915_BATCHBUFFER,
			 (unsigned long)batchbuffer);
}

typedef struct _drm_i915_cmdbuffer32 {
	u32 buf;		/* pointer to userspace command buffer */
	int sz;			/* nr bytes in buf */
	int DR1;		/* hw flags for GFX_OP_DRAWRECT_INFO */
	int DR4;		/* window origin for GFX_OP_DRAWRECT_INFO */
	int num_cliprects;	/* mulitpass with multiple cliprects? */
	u32 cliprects;		/* pointer to userspace cliprects */
} drm_i915_cmdbuffer32_t;

static int compat_i915_cmdbuffer(struct file *file, unsigned int cmd,
				 unsigned long arg)
{
	drm_i915_cmdbuffer32_t cmdbuffer32;
	drm_i915_cmdbuffer_t __user *cmdbuffer;

	if (copy_from_user
	    (&cmdbuffer32, (void __user *)arg, sizeof(cmdbuffer32)))
		return -EFAULT;

	cmdbuffer = compat_alloc_user_space(sizeof(*cmdbuffer));
	if (!access_ok(VERIFY_WRITE, cmdbuffer, sizeof(*cmdbuffer))
	    || __put_user((int __user *)(unsigned long)cmdbuffer32.buf,
			  &cmdbuffer->buf)
	    || __put_user(cmdbuffer32.sz, &cmdbuffer->sz)
	    || __put_user(cmdbuffer32.DR1, &cmdbuffer->DR1)
	    || __put_user(cmdbuffer32.DR4, &cmdbuffer->DR4)
	    || __put_user(cmdbuffer32.num_cliprects, &cmdbuffer->num_cliprects)
	    || __put_user((int __user *)(unsigned long)cmdbuffer32.cliprects,
			  &cmdbuffer->cliprects))
		return -EFAULT;

	return drm_ioctl(file->f_path.dentry->d_inode, file,
			 DRM_IOCTL_I915_CMDBUFFER, (unsigned long)cmdbuffer);
}

typedef struct drm_i915_irq_emit32 {
	u32 irq_seq;
} drm_i915_irq_emit32_t;

static int compat_i915_irq_emit(struct file *file, unsigned int cmd,
				unsigned long arg)
{
	drm_i915_irq_emit32_t req32;
	drm_i915_irq_emit_t __user *request;

	if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
		return -EFAULT;

	request = compat_alloc_user_space(sizeof(*request));
	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
	    || __put_user((int __user *)(unsigned long)req32.irq_seq,
			  &request->irq_seq))
		return -EFAULT;

	return drm_ioctl(file->f_path.dentry->d_inode, file,
			 DRM_IOCTL_I915_IRQ_EMIT, (unsigned long)request);
}
typedef struct drm_i915_getparam32 {
	int param;
	u32 value;
} drm_i915_getparam32_t;

static int compat_i915_getparam(struct file *file, unsigned int cmd,
				unsigned long arg)
{
	drm_i915_getparam32_t req32;
	drm_i915_getparam_t __user *request;

	if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
		return -EFAULT;

	request = compat_alloc_user_space(sizeof(*request));
	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
	    || __put_user(req32.param, &request->param)
	    || __put_user((void __user *)(unsigned long)req32.value,
			  &request->value))
		return -EFAULT;

	return drm_ioctl(file->f_path.dentry->d_inode, file,
			 DRM_IOCTL_I915_GETPARAM, (unsigned long)request);
}

typedef struct drm_i915_mem_alloc32 {
	int region;
	int alignment;
	int size;
	u32 region_offset;	/* offset from start of fb or agp */
} drm_i915_mem_alloc32_t;

static int compat_i915_alloc(struct file *file, unsigned int cmd,
			     unsigned long arg)
{
	drm_i915_mem_alloc32_t req32;
	drm_i915_mem_alloc_t __user *request;

	if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
		return -EFAULT;

	request = compat_alloc_user_space(sizeof(*request));
	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
	    || __put_user(req32.region, &request->region)
	    || __put_user(req32.alignment, &request->alignment)
	    || __put_user(req32.size, &request->size)
	    || __put_user((void __user *)(unsigned long)req32.region_offset,
			  &request->region_offset))
		return -EFAULT;

	return drm_ioctl(file->f_path.dentry->d_inode, file,
			 DRM_IOCTL_I915_ALLOC, (unsigned long)request);
}

drm_ioctl_compat_t *i915_compat_ioctls[] = {
	[DRM_I915_BATCHBUFFER] = compat_i915_batchbuffer,
	[DRM_I915_CMDBUFFER] = compat_i915_cmdbuffer,
	[DRM_I915_GETPARAM] = compat_i915_getparam,
	[DRM_I915_IRQ_EMIT] = compat_i915_irq_emit,
	[DRM_I915_ALLOC] = compat_i915_alloc
};

/**
 * 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 i915_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(i915_compat_ioctls))
		fn = i915_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_path.dentry->d_inode, filp, cmd, arg);
	unlock_kernel();

	return ret;
}
Commit	Line	Data
8ca7c1df DA	1	/**
	2	* \file i915_ioc32.c
	3	*
	4	* 32-bit ioctl compatibility routines for the i915 DRM.
	5	*
b5e89ed5	6	* \author Alan Hourihane <alanh@fairlite.demon.co.uk>
8ca7c1df DA	7	*
	8	*
	9	* Copyright (C) Paul Mackerras 2005
	10	* Copyright (C) Alan Hourihane 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>
8ca7c1df DA	33
	34	#include "drmP.h"
	35	#include "drm.h"
	36	#include "i915_drm.h"
	37
	38	typedef struct _drm_i915_batchbuffer32 {
	39	int start; /* agp offset */
	40	int used; /* nr bytes in use */
	41	int DR1; /* hw flags for GFX_OP_DRAWRECT_INFO */
	42	int DR4; /* window origin for GFX_OP_DRAWRECT_INFO */
	43	int num_cliprects; /* mulitpass with multiple cliprects? */
b5e89ed5	44	u32 cliprects; /* pointer to userspace cliprects */
8ca7c1df DA	45	} drm_i915_batchbuffer32_t;
	46
	47	static int compat_i915_batchbuffer(struct file *file, unsigned int cmd,
b5e89ed5	48	unsigned long arg)
8ca7c1df DA	49	{
	50	drm_i915_batchbuffer32_t batchbuffer32;
	51	drm_i915_batchbuffer_t __user *batchbuffer;
b5e89ed5 DA	52
	53	if (copy_from_user
	54	(&batchbuffer32, (void __user *)arg, sizeof(batchbuffer32)))
8ca7c1df	55	return -EFAULT;
b5e89ed5	56
8ca7c1df DA	57	batchbuffer = compat_alloc_user_space(sizeof(*batchbuffer));
	58	if (!access_ok(VERIFY_WRITE, batchbuffer, sizeof(*batchbuffer))
	59	\|\| __put_user(batchbuffer32.start, &batchbuffer->start)
	60	\|\| __put_user(batchbuffer32.used, &batchbuffer->used)
	61	\|\| __put_user(batchbuffer32.DR1, &batchbuffer->DR1)
	62	\|\| __put_user(batchbuffer32.DR4, &batchbuffer->DR4)
b5e89ed5 DA	63	\|\| __put_user(batchbuffer32.num_cliprects,
b5e89ed5 DA	64	&batchbuffer->num_cliprects)
8ca7c1df DA	65	\|\| __put_user((int __user *)(unsigned long)batchbuffer32.cliprects,
	66	&batchbuffer->cliprects))
	67	return -EFAULT;
b5e89ed5	68
cc5ef55f	69	return drm_ioctl(file->f_path.dentry->d_inode, file,
b5e89ed5 DA	70	DRM_IOCTL_I915_BATCHBUFFER,
b5e89ed5 DA	71	(unsigned long)batchbuffer);
8ca7c1df DA	72	}
	73
	74	typedef struct _drm_i915_cmdbuffer32 {
b5e89ed5	75	u32 buf; /* pointer to userspace command buffer */
8ca7c1df DA	76	int sz; /* nr bytes in buf */
	77	int DR1; /* hw flags for GFX_OP_DRAWRECT_INFO */
	78	int DR4; /* window origin for GFX_OP_DRAWRECT_INFO */
	79	int num_cliprects; /* mulitpass with multiple cliprects? */
b5e89ed5	80	u32 cliprects; /* pointer to userspace cliprects */
8ca7c1df DA	81	} drm_i915_cmdbuffer32_t;
	82
	83	static int compat_i915_cmdbuffer(struct file *file, unsigned int cmd,
b5e89ed5	84	unsigned long arg)
8ca7c1df DA	85	{
	86	drm_i915_cmdbuffer32_t cmdbuffer32;
	87	drm_i915_cmdbuffer_t __user *cmdbuffer;
b5e89ed5 DA	88
	89	if (copy_from_user
	90	(&cmdbuffer32, (void __user *)arg, sizeof(cmdbuffer32)))
8ca7c1df	91	return -EFAULT;
b5e89ed5	92
8ca7c1df DA	93	cmdbuffer = compat_alloc_user_space(sizeof(*cmdbuffer));
	94	if (!access_ok(VERIFY_WRITE, cmdbuffer, sizeof(*cmdbuffer))
	95	\|\| __put_user((int __user *)(unsigned long)cmdbuffer32.buf,
	96	&cmdbuffer->buf)
	97	\|\| __put_user(cmdbuffer32.sz, &cmdbuffer->sz)
	98	\|\| __put_user(cmdbuffer32.DR1, &cmdbuffer->DR1)
	99	\|\| __put_user(cmdbuffer32.DR4, &cmdbuffer->DR4)
	100	\|\| __put_user(cmdbuffer32.num_cliprects, &cmdbuffer->num_cliprects)
	101	\|\| __put_user((int __user *)(unsigned long)cmdbuffer32.cliprects,
	102	&cmdbuffer->cliprects))
	103	return -EFAULT;
b5e89ed5	104
cc5ef55f	105	return drm_ioctl(file->f_path.dentry->d_inode, file,
b5e89ed5	106	DRM_IOCTL_I915_CMDBUFFER, (unsigned long)cmdbuffer);
8ca7c1df DA	107	}
	108
	109	typedef struct drm_i915_irq_emit32 {
	110	u32 irq_seq;
	111	} drm_i915_irq_emit32_t;
	112
	113	static int compat_i915_irq_emit(struct file *file, unsigned int cmd,
b5e89ed5	114	unsigned long arg)
8ca7c1df DA	115	{
	116	drm_i915_irq_emit32_t req32;
	117	drm_i915_irq_emit_t __user *request;
	118
b5e89ed5	119	if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
8ca7c1df DA	120	return -EFAULT;
	121
	122	request = compat_alloc_user_space(sizeof(*request));
	123	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
	124	\|\| __put_user((int __user *)(unsigned long)req32.irq_seq,
	125	&request->irq_seq))
	126	return -EFAULT;
	127
cc5ef55f	128	return drm_ioctl(file->f_path.dentry->d_inode, file,
b5e89ed5	129	DRM_IOCTL_I915_IRQ_EMIT, (unsigned long)request);
8ca7c1df DA	130	}
	131	typedef struct drm_i915_getparam32 {
	132	int param;
	133	u32 value;
	134	} drm_i915_getparam32_t;
	135
	136	static int compat_i915_getparam(struct file *file, unsigned int cmd,
b5e89ed5	137	unsigned long arg)
8ca7c1df DA	138	{
	139	drm_i915_getparam32_t req32;
	140	drm_i915_getparam_t __user *request;
	141
b5e89ed5	142	if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
8ca7c1df DA	143	return -EFAULT;
	144
	145	request = compat_alloc_user_space(sizeof(*request));
	146	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
	147	\|\| __put_user(req32.param, &request->param)
	148	\|\| __put_user((void __user *)(unsigned long)req32.value,
	149	&request->value))
	150	return -EFAULT;
	151
cc5ef55f	152	return drm_ioctl(file->f_path.dentry->d_inode, file,
b5e89ed5	153	DRM_IOCTL_I915_GETPARAM, (unsigned long)request);
8ca7c1df DA	154	}
	155
	156	typedef struct drm_i915_mem_alloc32 {
	157	int region;
	158	int alignment;
	159	int size;
	160	u32 region_offset; /* offset from start of fb or agp */
	161	} drm_i915_mem_alloc32_t;
	162
	163	static int compat_i915_alloc(struct file *file, unsigned int cmd,
b5e89ed5	164	unsigned long arg)
8ca7c1df DA	165	{
	166	drm_i915_mem_alloc32_t req32;
	167	drm_i915_mem_alloc_t __user *request;
	168
b5e89ed5	169	if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
8ca7c1df DA	170	return -EFAULT;
	171
	172	request = compat_alloc_user_space(sizeof(*request));
	173	if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
	174	\|\| __put_user(req32.region, &request->region)
	175	\|\| __put_user(req32.alignment, &request->alignment)
	176	\|\| __put_user(req32.size, &request->size)
	177	\|\| __put_user((void __user *)(unsigned long)req32.region_offset,
	178	&request->region_offset))
	179	return -EFAULT;
	180
cc5ef55f	181	return drm_ioctl(file->f_path.dentry->d_inode, file,
b5e89ed5	182	DRM_IOCTL_I915_ALLOC, (unsigned long)request);
8ca7c1df DA	183	}
8ca7c1df DA	184
8ca7c1df DA	185	drm_ioctl_compat_t *i915_compat_ioctls[] = {
	186	[DRM_I915_BATCHBUFFER] = compat_i915_batchbuffer,
	187	[DRM_I915_CMDBUFFER] = compat_i915_cmdbuffer,
	188	[DRM_I915_GETPARAM] = compat_i915_getparam,
	189	[DRM_I915_IRQ_EMIT] = compat_i915_irq_emit,
	190	[DRM_I915_ALLOC] = compat_i915_alloc
	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 i915_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);
b5e89ed5	210
8ca7c1df DA	211	if (nr < DRM_COMMAND_BASE + DRM_ARRAY_SIZE(i915_compat_ioctls))
	212	fn = i915_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	217	else
cc5ef55f	218	ret = drm_ioctl(filp->f_path.dentry->d_inode, filp, cmd, arg);
8ca7c1df DA	219	unlock_kernel();
	220
	221	return ret;
	222	}