1 files changed, 419 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
new file mode 100644
index 00000000000..69c61f392e6
--- /dev/null
+++ b/drivers/gpu/drm/drm_ioctl.c
@@ -0,0 +1,419 @@
+/**
+ * \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 <drm/drmP.h>
+#include <drm/drm_core.h>
+
+#include <linux/pci.h>
+#include <linux/export.h>
+#ifdef CONFIG_X86
+#include <asm/mtrr.h>
+#endif
+
+/**
+ * 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;
+	struct drm_master *master = file_priv->master;
+
+	if (u->unique_len >= master->unique_len) {
+		if (copy_to_user(u->unique, master->unique, master->unique_len))
+			return -EFAULT;
+	}
+	u->unique_len = master->unique_len;
+
+	return 0;
+}
+
+static void
+drm_unset_busid(struct drm_device *dev,
+		struct drm_master *master)
+{
+	kfree(master->unique);
+	master->unique = NULL;
+	master->unique_len = 0;
+	master->unique_size = 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. Also note that KMS is all version 1.1 and later and
+ * UMS was only ever supported on pci devices.
+ */
+int drm_setunique(struct drm_device *dev, void *data,
+		  struct drm_file *file_priv)
+{
+	struct drm_unique *u = data;
+	struct drm_master *master = file_priv->master;
+	int ret;
+
+	if (master->unique_len || master->unique)
+		return -EBUSY;
+
+	if (!u->unique_len || u->unique_len > 1024)
+		return -EINVAL;
+
+	if (drm_core_check_feature(dev, DRIVER_MODESET))
+		return 0;
+
+	if (WARN_ON(!dev->pdev))
+		return -EINVAL;
+
+	ret = drm_pci_set_unique(dev, master, u);
+	if (ret)
+		goto err;
+
+	return 0;
+
+err:
+	drm_unset_busid(dev, master);
+	return ret;
+}
+
+static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv)
+{
+	struct drm_master *master = file_priv->master;
+	int ret;
+
+	if (master->unique != NULL)
+		drm_unset_busid(dev, master);
+
+	if (dev->driver->bus && dev->driver->bus->set_busid) {
+		ret = dev->driver->bus->set_busid(dev, master);
+		if (ret) {
+			drm_unset_busid(dev, master);
+			return ret;
+		}
+	} else {
+		if (WARN(dev->unique == NULL,
+			 "No drm_bus.set_busid() implementation provided by "
+			 "%ps. Use drm_dev_set_unique() to set the unique "
+			 "name explicitly.", dev->driver))
+			return -EINVAL;
+
+		master->unique = kstrdup(dev->unique, GFP_KERNEL);
+		if (master->unique)
+			master->unique_len = strlen(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;
+	if (idx < 0)
+		return -EINVAL;
+
+	i = 0;
+	mutex_lock(&dev->struct_mutex);
+	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;
+
+#ifdef CONFIG_X86
+	/*
+	 * There appears to be exactly one user of the mtrr index: dritest.
+	 * It's easy enough to keep it working on non-PAT systems.
+	 */
+	map->mtrr = phys_wc_to_mtrr_index(r_list->map->mtrr);
+#else
+	map->mtrr = -1;
+#endif
+
+	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;
+
+	/*
+	 * Hollowed-out getclient ioctl to keep some dead old drm tests/tools
+	 * not breaking completely. Userspace tools stop enumerating one they
+	 * get -EINVAL, hence this is the return value we need to hand back for
+	 * no clients tracked.
+	 *
+	 * Unfortunately some clients (*cough* libva *cough*) use this in a fun
+	 * attempt to figure out whether they're authenticated or not. Since
+	 * that's the only thing they care about, give it to the directly
+	 * instead of walking one giant list.
+	 */
+	if (client->idx == 0) {
+		client->auth = file_priv->authenticated;
+		client->pid = pid_vnr(file_priv->pid);
+		client->uid = from_kuid_munged(current_user_ns(),
+					       file_priv->uid);
+		client->magic = 0;
+		client->iocs = 0;
+
+		return 0;
+	} else {
+		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;
+
+	/* Clear stats to prevent userspace from eating its stack garbage. */
+	memset(stats, 0, sizeof(*stats));
+
+	return 0;
+}
+
+/**
+ * Get device/driver capabilities
+ */
+int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
+{
+	struct drm_get_cap *req = data;
+
+	req->value = 0;
+	switch (req->capability) {
+	case DRM_CAP_DUMB_BUFFER:
+		if (dev->driver->dumb_create)
+			req->value = 1;
+		break;
+	case DRM_CAP_VBLANK_HIGH_CRTC:
+		req->value = 1;
+		break;
+	case DRM_CAP_DUMB_PREFERRED_DEPTH:
+		req->value = dev->mode_config.preferred_depth;
+		break;
+	case DRM_CAP_DUMB_PREFER_SHADOW:
+		req->value = dev->mode_config.prefer_shadow;
+		break;
+	case DRM_CAP_PRIME:
+		req->value |= dev->driver->prime_fd_to_handle ? DRM_PRIME_CAP_IMPORT : 0;
+		req->value |= dev->driver->prime_handle_to_fd ? DRM_PRIME_CAP_EXPORT : 0;
+		break;
+	case DRM_CAP_TIMESTAMP_MONOTONIC:
+		req->value = drm_timestamp_monotonic;
+		break;
+	case DRM_CAP_ASYNC_PAGE_FLIP:
+		req->value = dev->mode_config.async_page_flip;
+		break;
+	case DRM_CAP_CURSOR_WIDTH:
+		if (dev->mode_config.cursor_width)
+			req->value = dev->mode_config.cursor_width;
+		else
+			req->value = 64;
+		break;
+	case DRM_CAP_CURSOR_HEIGHT:
+		if (dev->mode_config.cursor_height)
+			req->value = dev->mode_config.cursor_height;
+		else
+			req->value = 64;
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+/**
+ * Set device/driver capabilities
+ */
+int
+drm_setclientcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
+{
+	struct drm_set_client_cap *req = data;
+
+	switch (req->capability) {
+	case DRM_CLIENT_CAP_STEREO_3D:
+		if (req->value > 1)
+			return -EINVAL;
+		file_priv->stereo_allowed = req->value;
+		break;
+	case DRM_CLIENT_CAP_UNIVERSAL_PLANES:
+		if (!drm_universal_planes)
+			return -EINVAL;
+		if (req->value > 1)
+			return -EINVAL;
+		file_priv->universal_planes = req->value;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	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
+			 * Version 1.4 has proper PCI domain support
+			 */
+			retcode = drm_set_busid(dev, file_priv);
+			if (retcode)
+				goto done;
+		}
+	}
+
+	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;
+		}
+	}
+
+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;
+}
+EXPORT_SYMBOL(drm_noop);