diff options
Diffstat (limited to 'drivers/gpu/drm/drm_ioctl.c')
-rw-r--r-- | drivers/gpu/drm/drm_ioctl.c | 352 |
1 files changed, 352 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c new file mode 100644 index 0000000..16829fb --- /dev/null +++ b/drivers/gpu/drm/drm_ioctl.c @@ -0,0 +1,352 @@ +/** + * \file drm_ioctl.c + * 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 file_priv DRM file private. + * \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 drm_device *dev, void *data, + struct drm_file *file_priv) +{ + struct drm_unique *u = data; + + 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; + + return 0; +} + +/** + * Set the bus id. + * + * \param inode device inode. + * \param file_priv DRM file private. + * \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 drm_device *dev, void *data, + struct drm_file *file_priv) +{ + struct drm_unique *u = data; + int domain, bus, slot, func, ret; + + if (dev->unique_len || dev->unique) + return -EBUSY; + + 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 -EINVAL; + domain = bus >> 8; + bus &= 0xff; + + if ((domain != drm_get_pci_domain(dev)) || + (bus != dev->pdev->bus->number) || + (slot != PCI_SLOT(dev->pdev->devfn)) || + (func != PCI_FUNC(dev->pdev->devfn))) + return -EINVAL; + + return 0; +} + +static int drm_set_busid(struct drm_device * dev) +{ + int len; + + if (dev->unique != NULL) + return 0; + + dev->unique_len = 40; + dev->unique = drm_alloc(dev->unique_len + 1, DRM_MEM_DRIVER); + if (dev->unique == NULL) + return -ENOMEM; + + len = snprintf(dev->unique, dev->unique_len, "pci:%04x:%02x:%02x.%d", + drm_get_pci_domain(dev), dev->pdev->bus->number, + PCI_SLOT(dev->pdev->devfn), + PCI_FUNC(dev->pdev->devfn)); + + if (len > dev->unique_len) + DRM_ERROR("Unique buffer overflowed\n"); + + 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 file_priv DRM file private. + * \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 drm_device *dev, void *data, + struct drm_file *file_priv) +{ + struct drm_map *map = data; + struct drm_map_list *r_list = NULL; + struct list_head *list; + int idx; + int i; + + idx = map->offset; + + mutex_lock(&dev->struct_mutex); + if (idx < 0) { + mutex_unlock(&dev->struct_mutex); + return -EINVAL; + } + + i = 0; + list_for_each(list, &dev->maplist) { + if (i == idx) { + r_list = list_entry(list, struct drm_map_list, head); + break; + } + i++; + } + if (!r_list || !r_list->map) { + mutex_unlock(&dev->struct_mutex); + 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 = (void *)(unsigned long) r_list->user_token; + map->mtrr = r_list->map->mtrr; + mutex_unlock(&dev->struct_mutex); + + return 0; +} + +/** + * Get client information. + * + * \param inode device inode. + * \param file_priv DRM file private. + * \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 drm_device *dev, void *data, + struct drm_file *file_priv) +{ + struct drm_client *client = data; + struct drm_file *pt; + int idx; + int i; + + idx = client->idx; + mutex_lock(&dev->struct_mutex); + + i = 0; + list_for_each_entry(pt, &dev->filelist, lhead) { + if (i++ >= idx) { + client->auth = pt->authenticated; + client->pid = pt->pid; + client->uid = pt->uid; + client->magic = pt->magic; + client->iocs = pt->ioctl_count; + mutex_unlock(&dev->struct_mutex); + + return 0; + } + } + mutex_unlock(&dev->struct_mutex); + + return -EINVAL; +} + +/** + * Get statistics information. + * + * \param inode device inode. + * \param file_priv DRM file private. + * \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 drm_device *dev, void *data, + struct drm_file *file_priv) +{ + struct drm_stats *stats = data; + int i; + + memset(stats, 0, sizeof(*stats)); + + mutex_lock(&dev->struct_mutex); + + 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; + + mutex_unlock(&dev->struct_mutex); + + return 0; +} + +/** + * Setversion ioctl. + * + * \param inode device inode. + * \param file_priv DRM file private. + * \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(struct drm_device *dev, void *data, struct drm_file *file_priv) +{ + struct drm_set_version *sv = data; + int if_version, retcode = 0; + + 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) { + retcode = -EINVAL; + goto done; + } + if_version = DRM_IF_VERSION(sv->drm_di_major, + sv->drm_di_minor); + dev->if_version = 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 != dev->driver->major || + sv->drm_dd_minor < 0 || sv->drm_dd_minor > + dev->driver->minor) { + retcode = -EINVAL; + goto done; + } + + if (dev->driver->set_version) + dev->driver->set_version(dev, sv); + } + +done: + sv->drm_di_major = DRM_IF_MAJOR; + sv->drm_di_minor = DRM_IF_MINOR; + sv->drm_dd_major = dev->driver->major; + sv->drm_dd_minor = dev->driver->minor; + + return retcode; +} + +/** No-op ioctl. */ +int drm_noop(struct drm_device *dev, void *data, + struct drm_file *file_priv) +{ + DRM_DEBUG("\n"); + return 0; +} |