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;
+}