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path: root/drivers/gpu/drm/drm_ioctl.c
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Diffstat (limited to 'drivers/gpu/drm/drm_ioctl.c')
-rw-r--r--drivers/gpu/drm/drm_ioctl.c352
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 000000000000..16829fb3089d
--- /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;
+}