diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_ioc32.c')
-rw-r--r-- | drivers/gpu/drm/i915/i915_ioc32.c | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_ioc32.c b/drivers/gpu/drm/i915/i915_ioc32.c new file mode 100644 index 0000000..1fe68a2 --- /dev/null +++ b/drivers/gpu/drm/i915/i915_ioc32.c @@ -0,0 +1,222 @@ +/** + * \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; +} |