/** * \file i915_ioc32.c * * 32-bit ioctl compatibility routines for the i915 DRM. * * \author Alan Hourihane * * * 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 #include #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_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_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_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_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_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. * * \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_dentry->d_inode, filp, cmd, arg); unlock_kernel(); return ret; }
