197 lines
6.1 KiB
C
197 lines
6.1 KiB
C
/**
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* \file mga_ioc32.c
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*
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* 32-bit ioctl compatibility routines for the MGA DRM.
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*
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* \author Dave Airlie <airlied@linux.ie> with code from patches by Egbert Eich
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*
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*
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* Copyright (C) Paul Mackerras 2005
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* Copyright (C) Egbert Eich 2003,2004
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* Copyright (C) Dave Airlie 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 "mga_drv.h"
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typedef struct drm32_mga_init {
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int func;
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u32 sarea_priv_offset;
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int chipset;
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int sgram;
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unsigned int maccess;
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unsigned int fb_cpp;
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unsigned int front_offset, front_pitch;
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unsigned int back_offset, back_pitch;
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unsigned int depth_cpp;
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unsigned int depth_offset, depth_pitch;
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unsigned int texture_offset[MGA_NR_TEX_HEAPS];
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unsigned int texture_size[MGA_NR_TEX_HEAPS];
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u32 fb_offset;
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u32 mmio_offset;
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u32 status_offset;
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u32 warp_offset;
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u32 primary_offset;
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u32 buffers_offset;
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} drm_mga_init32_t;
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static int compat_mga_init(struct file *file, unsigned int cmd,
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unsigned long arg)
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{
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drm_mga_init32_t init32;
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drm_mga_init_t init;
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if (copy_from_user(&init32, (void __user *)arg, sizeof(init32)))
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return -EFAULT;
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init.func = init32.func;
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init.sarea_priv_offset = init32.sarea_priv_offset;
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memcpy(&init.chipset, &init32.chipset,
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offsetof(drm_mga_init_t, fb_offset) -
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offsetof(drm_mga_init_t, chipset));
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init.fb_offset = init32.fb_offset;
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init.mmio_offset = init32.mmio_offset;
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init.status_offset = init32.status_offset;
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init.warp_offset = init32.warp_offset;
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init.primary_offset = init32.primary_offset;
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init.buffers_offset = init32.buffers_offset;
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return drm_ioctl_kernel(file, mga_dma_init, &init,
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DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
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}
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typedef struct drm_mga_getparam32 {
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int param;
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u32 value;
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} drm_mga_getparam32_t;
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static int compat_mga_getparam(struct file *file, unsigned int cmd,
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unsigned long arg)
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{
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drm_mga_getparam32_t getparam32;
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drm_mga_getparam_t getparam;
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if (copy_from_user(&getparam32, (void __user *)arg, sizeof(getparam32)))
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return -EFAULT;
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getparam.param = getparam32.param;
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getparam.value = compat_ptr(getparam32.value);
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return drm_ioctl_kernel(file, mga_getparam, &getparam, DRM_AUTH);
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}
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typedef struct drm_mga_drm_bootstrap32 {
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u32 texture_handle;
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u32 texture_size;
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u32 primary_size;
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u32 secondary_bin_count;
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u32 secondary_bin_size;
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u32 agp_mode;
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u8 agp_size;
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} drm_mga_dma_bootstrap32_t;
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static int compat_mga_dma_bootstrap(struct file *file, unsigned int cmd,
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unsigned long arg)
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{
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drm_mga_dma_bootstrap32_t dma_bootstrap32;
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drm_mga_dma_bootstrap_t dma_bootstrap;
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int err;
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if (copy_from_user(&dma_bootstrap32, (void __user *)arg,
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sizeof(dma_bootstrap32)))
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return -EFAULT;
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dma_bootstrap.texture_handle = dma_bootstrap32.texture_handle;
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dma_bootstrap.texture_size = dma_bootstrap32.texture_size;
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dma_bootstrap.primary_size = dma_bootstrap32.primary_size;
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dma_bootstrap.secondary_bin_count = dma_bootstrap32.secondary_bin_count;
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dma_bootstrap.secondary_bin_size = dma_bootstrap32.secondary_bin_size;
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dma_bootstrap.agp_mode = dma_bootstrap32.agp_mode;
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dma_bootstrap.agp_size = dma_bootstrap32.agp_size;
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err = drm_ioctl_kernel(file, mga_dma_bootstrap, &dma_bootstrap,
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DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY);
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if (err)
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return err;
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dma_bootstrap32.texture_handle = dma_bootstrap.texture_handle;
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dma_bootstrap32.texture_size = dma_bootstrap.texture_size;
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dma_bootstrap32.primary_size = dma_bootstrap.primary_size;
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dma_bootstrap32.secondary_bin_count = dma_bootstrap.secondary_bin_count;
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dma_bootstrap32.secondary_bin_size = dma_bootstrap.secondary_bin_size;
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dma_bootstrap32.agp_mode = dma_bootstrap.agp_mode;
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dma_bootstrap32.agp_size = dma_bootstrap.agp_size;
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if (copy_to_user((void __user *)arg, &dma_bootstrap32,
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sizeof(dma_bootstrap32)))
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return -EFAULT;
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return 0;
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}
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static struct {
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drm_ioctl_compat_t *fn;
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char *name;
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} mga_compat_ioctls[] = {
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#define DRM_IOCTL32_DEF(n, f)[DRM_##n] = {.fn = f, .name = #n}
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DRM_IOCTL32_DEF(MGA_INIT, compat_mga_init),
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DRM_IOCTL32_DEF(MGA_GETPARAM, compat_mga_getparam),
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DRM_IOCTL32_DEF(MGA_DMA_BOOTSTRAP, compat_mga_dma_bootstrap),
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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 mga_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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struct drm_file *file_priv = filp->private_data;
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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 + ARRAY_SIZE(mga_compat_ioctls))
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return drm_ioctl(filp, cmd, arg);
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fn = mga_compat_ioctls[nr - DRM_COMMAND_BASE].fn;
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if (!fn)
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return drm_ioctl(filp, cmd, arg);
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DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
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task_pid_nr(current),
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(long)old_encode_dev(file_priv->minor->kdev->devt),
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file_priv->authenticated,
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mga_compat_ioctls[nr - DRM_COMMAND_BASE].name);
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ret = (*fn) (filp, cmd, arg);
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if (ret)
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DRM_DEBUG("ret = %d\n", ret);
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return ret;
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}
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