223 lines
7.2 KiB
C
223 lines
7.2 KiB
C
/**
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* \file i915_ioc32.c
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*
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* 32-bit ioctl compatibility routines for the i915 DRM.
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*
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* \author Alan Hourihane <alanh@fairlite.demon.co.uk>
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*
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*
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* Copyright (C) Paul Mackerras 2005
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* Copyright (C) Alan Hourihane 2005
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include <linux/compat.h>
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#include "drmP.h"
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#include "drm.h"
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#include "i915_drm.h"
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typedef struct _drm_i915_batchbuffer32 {
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int start; /* agp offset */
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int used; /* nr bytes in use */
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int DR1; /* hw flags for GFX_OP_DRAWRECT_INFO */
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int DR4; /* window origin for GFX_OP_DRAWRECT_INFO */
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int num_cliprects; /* mulitpass with multiple cliprects? */
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u32 cliprects; /* pointer to userspace cliprects */
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} drm_i915_batchbuffer32_t;
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static int compat_i915_batchbuffer(struct file *file, unsigned int cmd,
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unsigned long arg)
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{
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drm_i915_batchbuffer32_t batchbuffer32;
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drm_i915_batchbuffer_t __user *batchbuffer;
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if (copy_from_user
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(&batchbuffer32, (void __user *)arg, sizeof(batchbuffer32)))
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return -EFAULT;
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batchbuffer = compat_alloc_user_space(sizeof(*batchbuffer));
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if (!access_ok(VERIFY_WRITE, batchbuffer, sizeof(*batchbuffer))
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|| __put_user(batchbuffer32.start, &batchbuffer->start)
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|| __put_user(batchbuffer32.used, &batchbuffer->used)
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|| __put_user(batchbuffer32.DR1, &batchbuffer->DR1)
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|| __put_user(batchbuffer32.DR4, &batchbuffer->DR4)
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|| __put_user(batchbuffer32.num_cliprects,
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&batchbuffer->num_cliprects)
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|| __put_user((int __user *)(unsigned long)batchbuffer32.cliprects,
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&batchbuffer->cliprects))
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return -EFAULT;
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return drm_ioctl(file->f_path.dentry->d_inode, file,
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DRM_IOCTL_I915_BATCHBUFFER,
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(unsigned long)batchbuffer);
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}
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typedef struct _drm_i915_cmdbuffer32 {
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u32 buf; /* pointer to userspace command buffer */
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int sz; /* nr bytes in buf */
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int DR1; /* hw flags for GFX_OP_DRAWRECT_INFO */
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int DR4; /* window origin for GFX_OP_DRAWRECT_INFO */
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int num_cliprects; /* mulitpass with multiple cliprects? */
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u32 cliprects; /* pointer to userspace cliprects */
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} drm_i915_cmdbuffer32_t;
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static int compat_i915_cmdbuffer(struct file *file, unsigned int cmd,
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unsigned long arg)
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{
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drm_i915_cmdbuffer32_t cmdbuffer32;
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drm_i915_cmdbuffer_t __user *cmdbuffer;
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if (copy_from_user
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(&cmdbuffer32, (void __user *)arg, sizeof(cmdbuffer32)))
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return -EFAULT;
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cmdbuffer = compat_alloc_user_space(sizeof(*cmdbuffer));
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if (!access_ok(VERIFY_WRITE, cmdbuffer, sizeof(*cmdbuffer))
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|| __put_user((int __user *)(unsigned long)cmdbuffer32.buf,
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&cmdbuffer->buf)
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|| __put_user(cmdbuffer32.sz, &cmdbuffer->sz)
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|| __put_user(cmdbuffer32.DR1, &cmdbuffer->DR1)
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|| __put_user(cmdbuffer32.DR4, &cmdbuffer->DR4)
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|| __put_user(cmdbuffer32.num_cliprects, &cmdbuffer->num_cliprects)
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|| __put_user((int __user *)(unsigned long)cmdbuffer32.cliprects,
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&cmdbuffer->cliprects))
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return -EFAULT;
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return drm_ioctl(file->f_path.dentry->d_inode, file,
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DRM_IOCTL_I915_CMDBUFFER, (unsigned long)cmdbuffer);
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}
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typedef struct drm_i915_irq_emit32 {
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u32 irq_seq;
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} drm_i915_irq_emit32_t;
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static int compat_i915_irq_emit(struct file *file, unsigned int cmd,
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unsigned long arg)
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{
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drm_i915_irq_emit32_t req32;
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drm_i915_irq_emit_t __user *request;
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if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
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return -EFAULT;
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request = compat_alloc_user_space(sizeof(*request));
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if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
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|| __put_user((int __user *)(unsigned long)req32.irq_seq,
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&request->irq_seq))
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return -EFAULT;
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return drm_ioctl(file->f_path.dentry->d_inode, file,
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DRM_IOCTL_I915_IRQ_EMIT, (unsigned long)request);
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}
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typedef struct drm_i915_getparam32 {
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int param;
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u32 value;
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} drm_i915_getparam32_t;
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static int compat_i915_getparam(struct file *file, unsigned int cmd,
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unsigned long arg)
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{
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drm_i915_getparam32_t req32;
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drm_i915_getparam_t __user *request;
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if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
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return -EFAULT;
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request = compat_alloc_user_space(sizeof(*request));
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if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
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|| __put_user(req32.param, &request->param)
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|| __put_user((void __user *)(unsigned long)req32.value,
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&request->value))
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return -EFAULT;
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return drm_ioctl(file->f_path.dentry->d_inode, file,
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DRM_IOCTL_I915_GETPARAM, (unsigned long)request);
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}
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typedef struct drm_i915_mem_alloc32 {
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int region;
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int alignment;
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int size;
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u32 region_offset; /* offset from start of fb or agp */
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} drm_i915_mem_alloc32_t;
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static int compat_i915_alloc(struct file *file, unsigned int cmd,
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unsigned long arg)
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{
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drm_i915_mem_alloc32_t req32;
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drm_i915_mem_alloc_t __user *request;
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if (copy_from_user(&req32, (void __user *)arg, sizeof(req32)))
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return -EFAULT;
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request = compat_alloc_user_space(sizeof(*request));
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if (!access_ok(VERIFY_WRITE, request, sizeof(*request))
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|| __put_user(req32.region, &request->region)
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|| __put_user(req32.alignment, &request->alignment)
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|| __put_user(req32.size, &request->size)
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|| __put_user((void __user *)(unsigned long)req32.region_offset,
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&request->region_offset))
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return -EFAULT;
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return drm_ioctl(file->f_path.dentry->d_inode, file,
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DRM_IOCTL_I915_ALLOC, (unsigned long)request);
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}
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drm_ioctl_compat_t *i915_compat_ioctls[] = {
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[DRM_I915_BATCHBUFFER] = compat_i915_batchbuffer,
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[DRM_I915_CMDBUFFER] = compat_i915_cmdbuffer,
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[DRM_I915_GETPARAM] = compat_i915_getparam,
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[DRM_I915_IRQ_EMIT] = compat_i915_irq_emit,
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[DRM_I915_ALLOC] = compat_i915_alloc
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};
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/**
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* Called whenever a 32-bit process running under a 64-bit kernel
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* performs an ioctl on /dev/dri/card<n>.
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*
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* \param filp file pointer.
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* \param cmd command.
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* \param arg user argument.
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* \return zero on success or negative number on failure.
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*/
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long i915_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
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{
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unsigned int nr = DRM_IOCTL_NR(cmd);
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drm_ioctl_compat_t *fn = NULL;
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int ret;
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if (nr < DRM_COMMAND_BASE)
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return drm_compat_ioctl(filp, cmd, arg);
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if (nr < DRM_COMMAND_BASE + DRM_ARRAY_SIZE(i915_compat_ioctls))
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fn = i915_compat_ioctls[nr - DRM_COMMAND_BASE];
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lock_kernel(); /* XXX for now */
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if (fn != NULL)
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ret = (*fn) (filp, cmd, arg);
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else
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ret = drm_ioctl(filp->f_path.dentry->d_inode, filp, cmd, arg);
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unlock_kernel();
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return ret;
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}
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