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https://github.com/edk2-porting/linux-next.git
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c60ce623bd
This moves a bunch of typedefs into a !defined __KERNEL__ to keep userspace API compatiblity, it changes all internal usages to structs/enum/unions. Signed-off-by: Dave Airlie <airlied@linux.ie>
390 lines
10 KiB
C
390 lines
10 KiB
C
/**
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* \file drm_ioctl.c
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* IOCTL processing for DRM
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*
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* \author Rickard E. (Rik) Faith <faith@valinux.com>
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* \author Gareth Hughes <gareth@valinux.com>
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*/
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/*
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* Created: Fri Jan 8 09:01:26 1999 by faith@valinux.com
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*
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* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
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* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
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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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* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "drmP.h"
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#include "drm_core.h"
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#include "linux/pci.h"
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/**
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* Get the bus id.
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*
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* \param inode device inode.
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* \param filp file pointer.
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* \param cmd command.
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* \param arg user argument, pointing to a drm_unique structure.
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* \return zero on success or a negative number on failure.
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*
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* Copies the bus id from drm_device::unique into user space.
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*/
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int drm_getunique(struct inode *inode, struct file *filp,
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unsigned int cmd, unsigned long arg)
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{
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drm_file_t *priv = filp->private_data;
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drm_device_t *dev = priv->head->dev;
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struct drm_unique __user *argp = (void __user *)arg;
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struct drm_unique u;
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if (copy_from_user(&u, argp, sizeof(u)))
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return -EFAULT;
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if (u.unique_len >= dev->unique_len) {
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if (copy_to_user(u.unique, dev->unique, dev->unique_len))
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return -EFAULT;
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}
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u.unique_len = dev->unique_len;
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if (copy_to_user(argp, &u, sizeof(u)))
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return -EFAULT;
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return 0;
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}
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/**
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* Set the bus id.
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*
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* \param inode device inode.
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* \param filp file pointer.
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* \param cmd command.
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* \param arg user argument, pointing to a drm_unique structure.
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* \return zero on success or a negative number on failure.
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*
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* Copies the bus id from userspace into drm_device::unique, and verifies that
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* it matches the device this DRM is attached to (EINVAL otherwise). Deprecated
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* in interface version 1.1 and will return EBUSY when setversion has requested
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* version 1.1 or greater.
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*/
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int drm_setunique(struct inode *inode, struct file *filp,
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unsigned int cmd, unsigned long arg)
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{
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drm_file_t *priv = filp->private_data;
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drm_device_t *dev = priv->head->dev;
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struct drm_unique u;
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int domain, bus, slot, func, ret;
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if (dev->unique_len || dev->unique)
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return -EBUSY;
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if (copy_from_user(&u, (struct drm_unique __user *) arg, sizeof(u)))
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return -EFAULT;
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if (!u.unique_len || u.unique_len > 1024)
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return -EINVAL;
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dev->unique_len = u.unique_len;
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dev->unique = drm_alloc(u.unique_len + 1, DRM_MEM_DRIVER);
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if (!dev->unique)
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return -ENOMEM;
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if (copy_from_user(dev->unique, u.unique, dev->unique_len))
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return -EFAULT;
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dev->unique[dev->unique_len] = '\0';
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dev->devname =
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drm_alloc(strlen(dev->driver->pci_driver.name) +
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strlen(dev->unique) + 2, DRM_MEM_DRIVER);
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if (!dev->devname)
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return -ENOMEM;
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sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name,
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dev->unique);
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/* Return error if the busid submitted doesn't match the device's actual
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* busid.
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*/
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ret = sscanf(dev->unique, "PCI:%d:%d:%d", &bus, &slot, &func);
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if (ret != 3)
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return DRM_ERR(EINVAL);
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domain = bus >> 8;
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bus &= 0xff;
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if ((domain != drm_get_pci_domain(dev)) ||
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(bus != dev->pdev->bus->number) ||
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(slot != PCI_SLOT(dev->pdev->devfn)) ||
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(func != PCI_FUNC(dev->pdev->devfn)))
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return -EINVAL;
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return 0;
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}
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static int drm_set_busid(drm_device_t * dev)
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{
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int len;
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if (dev->unique != NULL)
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return 0;
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dev->unique_len = 40;
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dev->unique = drm_alloc(dev->unique_len + 1, DRM_MEM_DRIVER);
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if (dev->unique == NULL)
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return -ENOMEM;
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len = snprintf(dev->unique, dev->unique_len, "pci:%04x:%02x:%02x.%d",
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drm_get_pci_domain(dev), dev->pdev->bus->number,
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PCI_SLOT(dev->pdev->devfn),
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PCI_FUNC(dev->pdev->devfn));
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if (len > dev->unique_len)
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DRM_ERROR("Unique buffer overflowed\n");
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dev->devname =
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drm_alloc(strlen(dev->driver->pci_driver.name) + dev->unique_len +
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2, DRM_MEM_DRIVER);
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if (dev->devname == NULL)
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return -ENOMEM;
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sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name,
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dev->unique);
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return 0;
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}
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/**
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* Get a mapping information.
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*
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* \param inode device inode.
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* \param filp file pointer.
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* \param cmd command.
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* \param arg user argument, pointing to a drm_map structure.
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*
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* \return zero on success or a negative number on failure.
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*
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* Searches for the mapping with the specified offset and copies its information
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* into userspace
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*/
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int drm_getmap(struct inode *inode, struct file *filp,
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unsigned int cmd, unsigned long arg)
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{
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drm_file_t *priv = filp->private_data;
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drm_device_t *dev = priv->head->dev;
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struct drm_map __user *argp = (void __user *)arg;
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struct drm_map map;
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drm_map_list_t *r_list = NULL;
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struct list_head *list;
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int idx;
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int i;
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if (copy_from_user(&map, argp, sizeof(map)))
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return -EFAULT;
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idx = map.offset;
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mutex_lock(&dev->struct_mutex);
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if (idx < 0) {
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mutex_unlock(&dev->struct_mutex);
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return -EINVAL;
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}
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i = 0;
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list_for_each(list, &dev->maplist) {
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if (i == idx) {
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r_list = list_entry(list, drm_map_list_t, head);
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break;
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}
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i++;
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}
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if (!r_list || !r_list->map) {
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mutex_unlock(&dev->struct_mutex);
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return -EINVAL;
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}
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map.offset = r_list->map->offset;
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map.size = r_list->map->size;
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map.type = r_list->map->type;
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map.flags = r_list->map->flags;
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map.handle = (void *)(unsigned long)r_list->user_token;
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map.mtrr = r_list->map->mtrr;
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mutex_unlock(&dev->struct_mutex);
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if (copy_to_user(argp, &map, sizeof(map)))
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return -EFAULT;
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return 0;
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}
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/**
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* Get client information.
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*
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* \param inode device inode.
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* \param filp file pointer.
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* \param cmd command.
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* \param arg user argument, pointing to a drm_client structure.
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*
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* \return zero on success or a negative number on failure.
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*
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* Searches for the client with the specified index and copies its information
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* into userspace
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*/
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int drm_getclient(struct inode *inode, struct file *filp,
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unsigned int cmd, unsigned long arg)
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{
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drm_file_t *priv = filp->private_data;
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drm_device_t *dev = priv->head->dev;
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struct drm_client __user *argp = (struct drm_client __user *)arg;
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struct drm_client client;
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drm_file_t *pt;
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int idx;
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int i;
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if (copy_from_user(&client, argp, sizeof(client)))
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return -EFAULT;
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idx = client.idx;
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mutex_lock(&dev->struct_mutex);
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if (list_empty(&dev->filelist)) {
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mutex_unlock(&dev->struct_mutex);
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return -EINVAL;
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}
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i = 0;
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list_for_each_entry(pt, &dev->filelist, lhead) {
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if (i++ >= idx)
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break;
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}
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client.auth = pt->authenticated;
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client.pid = pt->pid;
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client.uid = pt->uid;
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client.magic = pt->magic;
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client.iocs = pt->ioctl_count;
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mutex_unlock(&dev->struct_mutex);
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if (copy_to_user(argp, &client, sizeof(client)))
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return -EFAULT;
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return 0;
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}
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/**
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* Get statistics information.
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*
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* \param inode device inode.
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* \param filp file pointer.
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* \param cmd command.
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* \param arg user argument, pointing to a drm_stats structure.
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*
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* \return zero on success or a negative number on failure.
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*/
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int drm_getstats(struct inode *inode, struct file *filp,
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unsigned int cmd, unsigned long arg)
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{
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drm_file_t *priv = filp->private_data;
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drm_device_t *dev = priv->head->dev;
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struct drm_stats stats;
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int i;
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memset(&stats, 0, sizeof(stats));
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mutex_lock(&dev->struct_mutex);
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for (i = 0; i < dev->counters; i++) {
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if (dev->types[i] == _DRM_STAT_LOCK)
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stats.data[i].value
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= (dev->lock.hw_lock ? dev->lock.hw_lock->lock : 0);
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else
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stats.data[i].value = atomic_read(&dev->counts[i]);
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stats.data[i].type = dev->types[i];
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}
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stats.count = dev->counters;
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mutex_unlock(&dev->struct_mutex);
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if (copy_to_user((struct drm_stats __user *) arg, &stats, sizeof(stats)))
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return -EFAULT;
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return 0;
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}
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/**
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* Setversion ioctl.
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*
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* \param inode device inode.
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* \param filp file pointer.
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* \param cmd command.
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* \param arg user argument, pointing to a drm_lock structure.
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* \return zero on success or negative number on failure.
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*
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* Sets the requested interface version
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*/
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int drm_setversion(DRM_IOCTL_ARGS)
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{
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DRM_DEVICE;
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struct drm_set_version sv;
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struct drm_set_version retv;
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int if_version;
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struct drm_set_version __user *argp = (void __user *)data;
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int ret;
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if (copy_from_user(&sv, argp, sizeof(sv)))
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return -EFAULT;
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retv.drm_di_major = DRM_IF_MAJOR;
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retv.drm_di_minor = DRM_IF_MINOR;
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retv.drm_dd_major = dev->driver->major;
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retv.drm_dd_minor = dev->driver->minor;
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if (copy_to_user(argp, &retv, sizeof(retv)))
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return -EFAULT;
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if (sv.drm_di_major != -1) {
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if (sv.drm_di_major != DRM_IF_MAJOR ||
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sv.drm_di_minor < 0 || sv.drm_di_minor > DRM_IF_MINOR)
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return -EINVAL;
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if_version = DRM_IF_VERSION(sv.drm_di_major, sv.drm_di_minor);
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dev->if_version = max(if_version, dev->if_version);
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if (sv.drm_di_minor >= 1) {
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/*
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* Version 1.1 includes tying of DRM to specific device
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*/
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ret = drm_set_busid(dev);
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if (ret)
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return ret;
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}
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}
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if (sv.drm_dd_major != -1) {
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if (sv.drm_dd_major != dev->driver->major ||
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sv.drm_dd_minor < 0
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|| sv.drm_dd_minor > dev->driver->minor)
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return -EINVAL;
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if (dev->driver->set_version)
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dev->driver->set_version(dev, &sv);
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}
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return 0;
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}
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/** No-op ioctl. */
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int drm_noop(struct inode *inode, struct file *filp, unsigned int cmd,
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unsigned long arg)
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{
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DRM_DEBUG("\n");
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return 0;
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}
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