diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/char/drm/drm_ioctl.c | |
download | op-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip op-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/char/drm/drm_ioctl.c')
-rw-r--r-- | drivers/char/drm/drm_ioctl.c | 370 |
1 files changed, 370 insertions, 0 deletions
diff --git a/drivers/char/drm/drm_ioctl.c b/drivers/char/drm/drm_ioctl.c new file mode 100644 index 0000000..39afda0 --- /dev/null +++ b/drivers/char/drm/drm_ioctl.c @@ -0,0 +1,370 @@ +/** + * \file drm_ioctl.h + * IOCTL processing for DRM + * + * \author Rickard E. (Rik) Faith <faith@valinux.com> + * \author Gareth Hughes <gareth@valinux.com> + */ + +/* + * Created: Fri Jan 8 09:01:26 1999 by faith@valinux.com + * + * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. + * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. + * 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 + * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS 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 "drmP.h" +#include "drm_core.h" + +#include "linux/pci.h" + +/** + * Get the bus id. + * + * \param inode device inode. + * \param filp file pointer. + * \param cmd command. + * \param arg user argument, pointing to a drm_unique structure. + * \return zero on success or a negative number on failure. + * + * Copies the bus id from drm_device::unique into user space. + */ +int drm_getunique(struct inode *inode, struct file *filp, + unsigned int cmd, unsigned long arg) +{ + drm_file_t *priv = filp->private_data; + drm_device_t *dev = priv->head->dev; + drm_unique_t __user *argp = (void __user *)arg; + drm_unique_t u; + + if (copy_from_user(&u, argp, sizeof(u))) + return -EFAULT; + if (u.unique_len >= dev->unique_len) { + if (copy_to_user(u.unique, dev->unique, dev->unique_len)) + return -EFAULT; + } + u.unique_len = dev->unique_len; + if (copy_to_user(argp, &u, sizeof(u))) + return -EFAULT; + return 0; +} + +/** + * Set the bus id. + * + * \param inode device inode. + * \param filp file pointer. + * \param cmd command. + * \param arg user argument, pointing to a drm_unique structure. + * \return zero on success or a negative number on failure. + * + * Copies the bus id from userspace into drm_device::unique, and verifies that + * it matches the device this DRM is attached to (EINVAL otherwise). Deprecated + * in interface version 1.1 and will return EBUSY when setversion has requested + * version 1.1 or greater. + */ +int drm_setunique(struct inode *inode, struct file *filp, + unsigned int cmd, unsigned long arg) +{ + drm_file_t *priv = filp->private_data; + drm_device_t *dev = priv->head->dev; + drm_unique_t u; + int domain, bus, slot, func, ret; + + if (dev->unique_len || dev->unique) return -EBUSY; + + if (copy_from_user(&u, (drm_unique_t __user *)arg, sizeof(u))) + return -EFAULT; + + if (!u.unique_len || u.unique_len > 1024) return -EINVAL; + + dev->unique_len = u.unique_len; + dev->unique = drm_alloc(u.unique_len + 1, DRM_MEM_DRIVER); + if(!dev->unique) return -ENOMEM; + if (copy_from_user(dev->unique, u.unique, dev->unique_len)) + return -EFAULT; + + dev->unique[dev->unique_len] = '\0'; + + dev->devname = drm_alloc(strlen(dev->driver->pci_driver.name) + strlen(dev->unique) + 2, + DRM_MEM_DRIVER); + if (!dev->devname) + return -ENOMEM; + + sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name, dev->unique); + + /* Return error if the busid submitted doesn't match the device's actual + * busid. + */ + ret = sscanf(dev->unique, "PCI:%d:%d:%d", &bus, &slot, &func); + if (ret != 3) + return DRM_ERR(EINVAL); + domain = bus >> 8; + bus &= 0xff; + + if ((domain != dev->pci_domain) || + (bus != dev->pci_bus) || + (slot != dev->pci_slot) || + (func != dev->pci_func)) + return -EINVAL; + + return 0; +} + +static int +drm_set_busid(drm_device_t *dev) +{ + if (dev->unique != NULL) + return EBUSY; + + dev->unique_len = 20; + dev->unique = drm_alloc(dev->unique_len + 1, DRM_MEM_DRIVER); + if (dev->unique == NULL) + return ENOMEM; + + snprintf(dev->unique, dev->unique_len, "pci:%04x:%02x:%02x.%d", + dev->pci_domain, dev->pci_bus, dev->pci_slot, dev->pci_func); + + dev->devname = drm_alloc(strlen(dev->driver->pci_driver.name) + dev->unique_len + 2, + DRM_MEM_DRIVER); + if (dev->devname == NULL) + return ENOMEM; + + sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name, dev->unique); + + return 0; +} + + +/** + * Get a mapping information. + * + * \param inode device inode. + * \param filp file pointer. + * \param cmd command. + * \param arg user argument, pointing to a drm_map structure. + * + * \return zero on success or a negative number on failure. + * + * Searches for the mapping with the specified offset and copies its information + * into userspace + */ +int drm_getmap( struct inode *inode, struct file *filp, + unsigned int cmd, unsigned long arg ) +{ + drm_file_t *priv = filp->private_data; + drm_device_t *dev = priv->head->dev; + drm_map_t __user *argp = (void __user *)arg; + drm_map_t map; + drm_map_list_t *r_list = NULL; + struct list_head *list; + int idx; + int i; + + if (copy_from_user(&map, argp, sizeof(map))) + return -EFAULT; + idx = map.offset; + + down(&dev->struct_sem); + if (idx < 0) { + up(&dev->struct_sem); + return -EINVAL; + } + + i = 0; + list_for_each(list, &dev->maplist->head) { + if(i == idx) { + r_list = list_entry(list, drm_map_list_t, head); + break; + } + i++; + } + if(!r_list || !r_list->map) { + up(&dev->struct_sem); + return -EINVAL; + } + + map.offset = r_list->map->offset; + map.size = r_list->map->size; + map.type = r_list->map->type; + map.flags = r_list->map->flags; + map.handle = r_list->map->handle; + map.mtrr = r_list->map->mtrr; + up(&dev->struct_sem); + + if (copy_to_user(argp, &map, sizeof(map))) return -EFAULT; + return 0; +} + +/** + * Get client information. + * + * \param inode device inode. + * \param filp file pointer. + * \param cmd command. + * \param arg user argument, pointing to a drm_client structure. + * + * \return zero on success or a negative number on failure. + * + * Searches for the client with the specified index and copies its information + * into userspace + */ +int drm_getclient( struct inode *inode, struct file *filp, + unsigned int cmd, unsigned long arg ) +{ + drm_file_t *priv = filp->private_data; + drm_device_t *dev = priv->head->dev; + drm_client_t __user *argp = (void __user *)arg; + drm_client_t client; + drm_file_t *pt; + int idx; + int i; + + if (copy_from_user(&client, argp, sizeof(client))) + return -EFAULT; + idx = client.idx; + down(&dev->struct_sem); + for (i = 0, pt = dev->file_first; i < idx && pt; i++, pt = pt->next) + ; + + if (!pt) { + up(&dev->struct_sem); + return -EINVAL; + } + client.auth = pt->authenticated; + client.pid = pt->pid; + client.uid = pt->uid; + client.magic = pt->magic; + client.iocs = pt->ioctl_count; + up(&dev->struct_sem); + + if (copy_to_user((drm_client_t __user *)arg, &client, sizeof(client))) + return -EFAULT; + return 0; +} + +/** + * Get statistics information. + * + * \param inode device inode. + * \param filp file pointer. + * \param cmd command. + * \param arg user argument, pointing to a drm_stats structure. + * + * \return zero on success or a negative number on failure. + */ +int drm_getstats( struct inode *inode, struct file *filp, + unsigned int cmd, unsigned long arg ) +{ + drm_file_t *priv = filp->private_data; + drm_device_t *dev = priv->head->dev; + drm_stats_t stats; + int i; + + memset(&stats, 0, sizeof(stats)); + + down(&dev->struct_sem); + + for (i = 0; i < dev->counters; i++) { + if (dev->types[i] == _DRM_STAT_LOCK) + stats.data[i].value + = (dev->lock.hw_lock + ? dev->lock.hw_lock->lock : 0); + else + stats.data[i].value = atomic_read(&dev->counts[i]); + stats.data[i].type = dev->types[i]; + } + + stats.count = dev->counters; + + up(&dev->struct_sem); + + if (copy_to_user((drm_stats_t __user *)arg, &stats, sizeof(stats))) + return -EFAULT; + return 0; +} + +/** + * Setversion ioctl. + * + * \param inode device inode. + * \param filp file pointer. + * \param cmd command. + * \param arg user argument, pointing to a drm_lock structure. + * \return zero on success or negative number on failure. + * + * Sets the requested interface version + */ +int drm_setversion(DRM_IOCTL_ARGS) +{ + DRM_DEVICE; + drm_set_version_t sv; + drm_set_version_t retv; + int if_version; + drm_set_version_t __user *argp = (void __user *)data; + drm_version_t version; + + DRM_COPY_FROM_USER_IOCTL(sv, argp, sizeof(sv)); + + memset(&version, 0, sizeof(version)); + + dev->driver->version(&version); + retv.drm_di_major = DRM_IF_MAJOR; + retv.drm_di_minor = DRM_IF_MINOR; + retv.drm_dd_major = version.version_major; + retv.drm_dd_minor = version.version_minor; + + DRM_COPY_TO_USER_IOCTL(argp, retv, sizeof(sv)); + + if (sv.drm_di_major != -1) { + if (sv.drm_di_major != DRM_IF_MAJOR || + sv.drm_di_minor < 0 || sv.drm_di_minor > DRM_IF_MINOR) + return EINVAL; + if_version = DRM_IF_VERSION(sv.drm_di_major, sv.drm_dd_minor); + dev->if_version = DRM_MAX(if_version, dev->if_version); + if (sv.drm_di_minor >= 1) { + /* + * Version 1.1 includes tying of DRM to specific device + */ + drm_set_busid(dev); + } + } + + if (sv.drm_dd_major != -1) { + if (sv.drm_dd_major != version.version_major || + sv.drm_dd_minor < 0 || sv.drm_dd_minor > version.version_minor) + return EINVAL; + + if (dev->driver->set_version) + dev->driver->set_version(dev, &sv); + } + return 0; +} + +/** No-op ioctl. */ +int drm_noop(struct inode *inode, struct file *filp, unsigned int cmd, + unsigned long arg) +{ + DRM_DEBUG("\n"); + return 0; +} |