[deliverable/linux.git] / drivers / char / drm / mga_ioc32.c

/**
 * \file mga_ioc32.c
 *
 * 32-bit ioctl compatibility routines for the MGA 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 "mga_drm.h"

typedef struct drm32_mga_init {
	int func;
   	u32 sarea_priv_offset;
	int chipset;
   	int sgram;
	unsigned int maccess;
   	unsigned int fb_cpp;
	unsigned int front_offset, front_pitch;
   	unsigned int back_offset, back_pitch;
   	unsigned int depth_cpp;
   	unsigned int depth_offset, depth_pitch;
   	unsigned int texture_offset[MGA_NR_TEX_HEAPS];
   	unsigned int texture_size[MGA_NR_TEX_HEAPS];
	u32 fb_offset;
	u32 mmio_offset;
	u32 status_offset;
	u32 warp_offset;
	u32 primary_offset;
	u32 buffers_offset;
} drm_mga_init32_t;

static int compat_mga_init(struct file *file, unsigned int cmd,
			   unsigned long arg)
{
	drm_mga_init32_t init32;
	drm_mga_init_t __user *init;
	int err = 0, i;
	
	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.chipset, &init->chipset)
	    || __put_user(init32.sgram, &init->sgram)
	    || __put_user(init32.maccess, &init->maccess)
	    || __put_user(init32.fb_cpp, &init->fb_cpp)
	    || __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_cpp, &init->depth_cpp)
	    || __put_user(init32.depth_offset, &init->depth_offset)
	    || __put_user(init32.depth_pitch, &init->depth_pitch)
	    || __put_user(init32.fb_offset, &init->fb_offset)
	    || __put_user(init32.mmio_offset, &init->mmio_offset)
	    || __put_user(init32.status_offset, &init->status_offset)
	    || __put_user(init32.warp_offset, &init->warp_offset)
	    || __put_user(init32.primary_offset, &init->primary_offset)
	    || __put_user(init32.buffers_offset, &init->buffers_offset))
		return -EFAULT;
	
	for (i=0; i<MGA_NR_TEX_HEAPS; i++)
	{
		err |= __put_user(init32.texture_offset[i], &init->texture_offset[i]);
		err |= __put_user(init32.texture_size[i], &init->texture_size[i]);
	}
	if (err)
		return -EFAULT;
	
	return drm_ioctl(file->f_dentry->d_inode, file,
			 DRM_IOCTL_MGA_INIT, (unsigned long) init);
}


typedef struct drm_mga_getparam32 {
	int param;
	u32 value;
} drm_mga_getparam32_t;


static int compat_mga_getparam(struct file *file, unsigned int cmd,
			       unsigned long arg)
{
	drm_mga_getparam32_t getparam32;
	drm_mga_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_MGA_GETPARAM, (unsigned long)getparam);
}

typedef struct drm_mga_drm_bootstrap32 {
	u32 texture_handle;
	u32 texture_size;
	u32 primary_size;
	u32 secondary_bin_count;
	u32 secondary_bin_size;
	u32 agp_mode;
	u8 agp_size;
} drm_mga_dma_bootstrap32_t;

static int compat_mga_dma_bootstrap(struct file *file, unsigned int cmd,
				    unsigned long arg)
{
	drm_mga_dma_bootstrap32_t dma_bootstrap32;
	drm_mga_dma_bootstrap_t __user *dma_bootstrap;
	int err;

	if (copy_from_user(&dma_bootstrap32, (void __user *)arg,
			   sizeof(dma_bootstrap32)))
		return -EFAULT;

	dma_bootstrap = compat_alloc_user_space(sizeof(*dma_bootstrap));
	if (!access_ok(VERIFY_WRITE, dma_bootstrap, sizeof(*dma_bootstrap))
	    || __put_user(dma_bootstrap32.texture_handle,
			  &dma_bootstrap->texture_handle)
	    || __put_user(dma_bootstrap32.texture_size,
			  &dma_bootstrap->texture_size)
	    || __put_user(dma_bootstrap32.primary_size,
			  &dma_bootstrap->primary_size)
	    || __put_user(dma_bootstrap32.secondary_bin_count,
			  &dma_bootstrap->secondary_bin_count)
	    || __put_user(dma_bootstrap32.secondary_bin_size,
			  &dma_bootstrap->secondary_bin_size)
	    || __put_user(dma_bootstrap32.agp_mode, &dma_bootstrap->agp_mode)
	    || __put_user(dma_bootstrap32.agp_size, &dma_bootstrap->agp_size))
		return -EFAULT;

	err = drm_ioctl(file->f_dentry->d_inode, file,
			DRM_IOCTL_MGA_DMA_BOOTSTRAP,
			(unsigned long)dma_bootstrap);
	if (err)
		return err;

	if (__get_user(dma_bootstrap32.texture_handle,
		       &dma_bootstrap->texture_handle)
	    || __get_user(dma_bootstrap32.texture_size,
			  &dma_bootstrap->texture_size)
	    || __get_user(dma_bootstrap32.primary_size,
			  &dma_bootstrap->primary_size)
	    || __get_user(dma_bootstrap32.secondary_bin_count,
			  &dma_bootstrap->secondary_bin_count)
	    || __get_user(dma_bootstrap32.secondary_bin_size,
			  &dma_bootstrap->secondary_bin_size)
	    || __get_user(dma_bootstrap32.agp_mode,
			  &dma_bootstrap->agp_mode)
	    || __get_user(dma_bootstrap32.agp_size,
			  &dma_bootstrap->agp_size))
		return -EFAULT;

	if (copy_to_user((void __user *)arg, &dma_bootstrap32,
	    		 sizeof(dma_bootstrap32)))
		return -EFAULT;

	return 0;
}

drm_ioctl_compat_t *mga_compat_ioctls[] = {
	[DRM_MGA_INIT] = compat_mga_init,
	[DRM_MGA_GETPARAM] = compat_mga_getparam,
	[DRM_MGA_DMA_BOOTSTRAP] = compat_mga_dma_bootstrap,
};

/**
 * 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 mga_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(mga_compat_ioctls))
		fn = mga_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 mga_ioc32.c
	3	*
	4	* 32-bit ioctl compatibility routines for the MGA DRM.
	5	*
	6	* \author Dave Airlie <airlied@linux.ie> with code from patches by Egbert Eich
	7	*
	8	*
	9	* Copyright (C) Paul Mackerras 2005
	10	* Copyright (C) Egbert Eich 2003,2004
	11	* Copyright (C) Dave Airlie 2005
	12	* All Rights Reserved.
	13	*
	14	* Permission is hereby granted, free of charge, to any person obtaining a
	15	* copy of this software and associated documentation files (the "Software"),
	16	* to deal in the Software without restriction, including without limitation
	17	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	18	* and/or sell copies of the Software, and to permit persons to whom the
	19	* Software is furnished to do so, subject to the following conditions:
	20	*
	21	* The above copyright notice and this permission notice (including the next
	22	* paragraph) shall be included in all copies or substantial portions of the
	23	* Software.
	24	*
	25	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	26	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	27	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	28	* THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
	29	* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	30	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
	31	* IN THE SOFTWARE.
	32	*/
	33	#include <linux/compat.h>
	34	#include <linux/ioctl32.h>
	35
	36	#include "drmP.h"
	37	#include "drm.h"
	38	#include "mga_drm.h"
	39
	40	typedef struct drm32_mga_init {
	41	int func;
	42	u32 sarea_priv_offset;
	43	int chipset;
	44	int sgram;
	45	unsigned int maccess;
	46	unsigned int fb_cpp;
	47	unsigned int front_offset, front_pitch;
	48	unsigned int back_offset, back_pitch;
	49	unsigned int depth_cpp;
	50	unsigned int depth_offset, depth_pitch;
	51	unsigned int texture_offset[MGA_NR_TEX_HEAPS];
	52	unsigned int texture_size[MGA_NR_TEX_HEAPS];
	53	u32 fb_offset;
	54	u32 mmio_offset;
	55	u32 status_offset;
	56	u32 warp_offset;
	57	u32 primary_offset;
	58	u32 buffers_offset;
	59	} drm_mga_init32_t;
	60
	61	static int compat_mga_init(struct file *file, unsigned int cmd,
	62	unsigned long arg)
	63	{
	64	drm_mga_init32_t init32;
65	drm_mga_init_t __user *init;
66	int err = 0, i;
67
68	if (copy_from_user(&init32, (void __user *)arg, sizeof(init32)))
69	return -EFAULT;
70
71	init = compat_alloc_user_space(sizeof(*init));
72	if (!access_ok(VERIFY_WRITE, init, sizeof(*init))
73	\|\| __put_user(init32.func, &init->func)
74	\|\| __put_user(init32.sarea_priv_offset, &init->sarea_priv_offset)
75	\|\| __put_user(init32.chipset, &init->chipset)
76	\|\| __put_user(init32.sgram, &init->sgram)
77	\|\| __put_user(init32.maccess, &init->maccess)
78	\|\| __put_user(init32.fb_cpp, &init->fb_cpp)
79	\|\| __put_user(init32.front_offset, &init->front_offset)
80	\|\| __put_user(init32.front_pitch, &init->front_pitch)
81	\|\| __put_user(init32.back_offset, &init->back_offset)
82	\|\| __put_user(init32.back_pitch, &init->back_pitch)
83	\|\| __put_user(init32.depth_cpp, &init->depth_cpp)
84	\|\| __put_user(init32.depth_offset, &init->depth_offset)
85	\|\| __put_user(init32.depth_pitch, &init->depth_pitch)
86	\|\| __put_user(init32.fb_offset, &init->fb_offset)
87	\|\| __put_user(init32.mmio_offset, &init->mmio_offset)
88	\|\| __put_user(init32.status_offset, &init->status_offset)
89	\|\| __put_user(init32.warp_offset, &init->warp_offset)
90	\|\| __put_user(init32.primary_offset, &init->primary_offset)
91	\|\| __put_user(init32.buffers_offset, &init->buffers_offset))
92	return -EFAULT;
93
94	for (i=0; i<MGA_NR_TEX_HEAPS; i++)
95	{
96	err \|= __put_user(init32.texture_offset[i], &init->texture_offset[i]);
97	err \|= __put_user(init32.texture_size[i], &init->texture_size[i]);
98	}
99	if (err)
100	return -EFAULT;
101
102	return drm_ioctl(file->f_dentry->d_inode, file,
103	DRM_IOCTL_MGA_INIT, (unsigned long) init);
104	}
105
106
107	typedef struct drm_mga_getparam32 {
108	int param;
109	u32 value;
110	} drm_mga_getparam32_t;
111
112
113	static int compat_mga_getparam(struct file *file, unsigned int cmd,
114	unsigned long arg)
115	{
116	drm_mga_getparam32_t getparam32;
117	drm_mga_getparam_t __user *getparam;
118
119	if (copy_from_user(&getparam32, (void __user *)arg, sizeof(getparam32)))
120	return -EFAULT;
121
122	getparam = compat_alloc_user_space(sizeof(*getparam));
123	if (!access_ok(VERIFY_WRITE, getparam, sizeof(*getparam))
124	\|\| __put_user(getparam32.param, &getparam->param)
125	\|\| __put_user((void __user *)(unsigned long)getparam32.value, &getparam->value))
126	return -EFAULT;
127
128	return drm_ioctl(file->f_dentry->d_inode, file,
129	DRM_IOCTL_MGA_GETPARAM, (unsigned long)getparam);
130	}
131
d1f2b55a DA	132	typedef struct drm_mga_drm_bootstrap32 {
	133	u32 texture_handle;
	134	u32 texture_size;
	135	u32 primary_size;
	136	u32 secondary_bin_count;
	137	u32 secondary_bin_size;
	138	u32 agp_mode;
	139	u8 agp_size;
	140	} drm_mga_dma_bootstrap32_t;
	141
	142	static int compat_mga_dma_bootstrap(struct file *file, unsigned int cmd,
	143	unsigned long arg)
	144	{
	145	drm_mga_dma_bootstrap32_t dma_bootstrap32;
	146	drm_mga_dma_bootstrap_t __user *dma_bootstrap;
	147	int err;
	148
	149	if (copy_from_user(&dma_bootstrap32, (void __user *)arg,
	150	sizeof(dma_bootstrap32)))
	151	return -EFAULT;
	152
	153	dma_bootstrap = compat_alloc_user_space(sizeof(*dma_bootstrap));
	154	if (!access_ok(VERIFY_WRITE, dma_bootstrap, sizeof(*dma_bootstrap))
	155	\|\| __put_user(dma_bootstrap32.texture_handle,
	156	&dma_bootstrap->texture_handle)
	157	\|\| __put_user(dma_bootstrap32.texture_size,
	158	&dma_bootstrap->texture_size)
	159	\|\| __put_user(dma_bootstrap32.primary_size,
	160	&dma_bootstrap->primary_size)
	161	\|\| __put_user(dma_bootstrap32.secondary_bin_count,
	162	&dma_bootstrap->secondary_bin_count)
	163	\|\| __put_user(dma_bootstrap32.secondary_bin_size,
	164	&dma_bootstrap->secondary_bin_size)
	165	\|\| __put_user(dma_bootstrap32.agp_mode, &dma_bootstrap->agp_mode)
	166	\|\| __put_user(dma_bootstrap32.agp_size, &dma_bootstrap->agp_size))
	167	return -EFAULT;
	168
	169	err = drm_ioctl(file->f_dentry->d_inode, file,
	170	DRM_IOCTL_MGA_DMA_BOOTSTRAP,
	171	(unsigned long)dma_bootstrap);
	172	if (err)
	173	return err;
	174
	175	if (__get_user(dma_bootstrap32.texture_handle,
	176	&dma_bootstrap->texture_handle)
	177	\|\| __get_user(dma_bootstrap32.texture_size,
	178	&dma_bootstrap->texture_size)
	179	\|\| __get_user(dma_bootstrap32.primary_size,
	180	&dma_bootstrap->primary_size)
	181	\|\| __get_user(dma_bootstrap32.secondary_bin_count,
	182	&dma_bootstrap->secondary_bin_count)
	183	\|\| __get_user(dma_bootstrap32.secondary_bin_size,
	184	&dma_bootstrap->secondary_bin_size)
	185	\|\| __get_user(dma_bootstrap32.agp_mode,
	186	&dma_bootstrap->agp_mode)
	187	\|\| __get_user(dma_bootstrap32.agp_size,
	188	&dma_bootstrap->agp_size))
	189	return -EFAULT;
	190
	191	if (copy_to_user((void __user *)arg, &dma_bootstrap32,
	192	sizeof(dma_bootstrap32)))
	193	return -EFAULT;
	194
	195	return 0;
196	}
197
8ca7c1df DA	198	drm_ioctl_compat_t *mga_compat_ioctls[] = {
	199	[DRM_MGA_INIT] = compat_mga_init,
	200	[DRM_MGA_GETPARAM] = compat_mga_getparam,
d1f2b55a	201	[DRM_MGA_DMA_BOOTSTRAP] = compat_mga_dma_bootstrap,
8ca7c1df DA	202	};
	203
	204	/**
	205	* Called whenever a 32-bit process running under a 64-bit kernel
	206	* performs an ioctl on /dev/dri/card<n>.
	207	*
	208	* \param filp file pointer.
	209	* \param cmd command.
	210	* \param arg user argument.
	211	* \return zero on success or negative number on failure.
	212	*/
	213	long mga_compat_ioctl(struct file *filp, unsigned int cmd,
	214	unsigned long arg)
	215	{
	216	unsigned int nr = DRM_IOCTL_NR(cmd);
	217	drm_ioctl_compat_t *fn = NULL;
	218	int ret;
	219
	220	if (nr < DRM_COMMAND_BASE)
	221	return drm_compat_ioctl(filp, cmd, arg);
	222
	223	if (nr < DRM_COMMAND_BASE + DRM_ARRAY_SIZE(mga_compat_ioctls))
	224	fn = mga_compat_ioctls[nr - DRM_COMMAND_BASE];
	225
	226	lock_kernel(); /* XXX for now */
	227	if (fn != NULL)
	228	ret = (*fn)(filp, cmd, arg);
	229	else
	230	ret = drm_ioctl(filp->f_dentry->d_inode, filp, cmd, arg);
	231	unlock_kernel();
	232
	233	return ret;
	234	}