fishHEADmaster

1 files changed, 217 insertions, 0 deletions

diff --git a/drivers/gpu/drm/drm_proc.c b/drivers/gpu/drm/drm_proc.c
new file mode 100644
index 0000000..0646a46
--- /dev/null
+++ b/drivers/gpu/drm/drm_proc.c
@@ -0,0 +1,217 @@
+/**
+ * \file drm_proc.c
+ * /proc support for DRM
+ *
+ * \author Rickard E. (Rik) Faith <faith@valinux.com>
+ * \author Gareth Hughes <gareth@valinux.com>
+ *
+ * \par Acknowledgements:
+ *    Matthew J Sottek <matthew.j.sottek@intel.com> sent in a patch to fix
+ *    the problem with the proc files not outputting all their information.
+ */
+
+/*
+ * Created: Mon Jan 11 09:48:47 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 <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/export.h>
+#include <drm/drmP.h>
+
+/***************************************************
+ * Initialization, etc.
+ **************************************************/
+
+/**
+ * Proc file list.
+ */
+static const struct drm_info_list drm_proc_list[] = {
+	{"name", drm_name_info, 0},
+	{"vm", drm_vm_info, 0},
+	{"clients", drm_clients_info, 0},
+	{"bufs", drm_bufs_info, 0},
+	{"gem_names", drm_gem_name_info, DRIVER_GEM},
+#if DRM_DEBUG_CODE
+	{"vma", drm_vma_info, 0},
+#endif
+};
+#define DRM_PROC_ENTRIES ARRAY_SIZE(drm_proc_list)
+
+static int drm_proc_open(struct inode *inode, struct file *file)
+{
+	struct drm_info_node* node = PDE_DATA(inode);
+
+	return single_open(file, node->info_ent->show, node);
+}
+
+static const struct file_operations drm_proc_fops = {
+	.owner = THIS_MODULE,
+	.open = drm_proc_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+
+
+/**
+ * Initialize a given set of proc files for a device
+ *
+ * \param files The array of files to create
+ * \param count The number of files given
+ * \param root DRI proc dir entry.
+ * \param minor device minor number
+ * \return Zero on success, non-zero on failure
+ *
+ * Create a given set of proc files represented by an array of
+ * gdm_proc_lists in the given root directory.
+ */
+static int drm_proc_create_files(const struct drm_info_list *files, int count,
+			  struct proc_dir_entry *root, struct drm_minor *minor)
+{
+	struct drm_device *dev = minor->dev;
+	struct proc_dir_entry *ent;
+	struct drm_info_node *tmp;
+	int i, ret;
+
+	for (i = 0; i < count; i++) {
+		u32 features = files[i].driver_features;
+
+		if (features != 0 &&
+		    (dev->driver->driver_features & features) != features)
+			continue;
+
+		tmp = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL);
+		if (tmp == NULL) {
+			ret = -1;
+			goto fail;
+		}
+		tmp->minor = minor;
+		tmp->info_ent = &files[i];
+		list_add(&tmp->list, &minor->proc_nodes.list);
+
+		ent = proc_create_data(files[i].name, S_IRUGO, root,
+				       &drm_proc_fops, tmp);
+		if (!ent) {
+			DRM_ERROR("Cannot create /proc/dri/%u/%s\n",
+				  minor->index, files[i].name);
+			list_del(&tmp->list);
+			kfree(tmp);
+			ret = -1;
+			goto fail;
+		}
+	}
+	return 0;
+
+fail:
+	for (i = 0; i < count; i++)
+		remove_proc_entry(drm_proc_list[i].name, minor->proc_root);
+	return ret;
+}
+
+/**
+ * Initialize the DRI proc filesystem for a device
+ *
+ * \param dev DRM device
+ * \param root DRI proc dir entry.
+ * \param dev_root resulting DRI device proc dir entry.
+ * \return root entry pointer on success, or NULL on failure.
+ *
+ * Create the DRI proc root entry "/proc/dri", the device proc root entry
+ * "/proc/dri/%minor%/", and each entry in proc_list as
+ * "/proc/dri/%minor%/%name%".
+ */
+int drm_proc_init(struct drm_minor *minor, struct proc_dir_entry *root)
+{
+	char name[12];
+	int ret;
+
+	INIT_LIST_HEAD(&minor->proc_nodes.list);
+	sprintf(name, "%u", minor->index);
+	minor->proc_root = proc_mkdir(name, root);
+	if (!minor->proc_root) {
+		DRM_ERROR("Cannot create /proc/dri/%s\n", name);
+		return -1;
+	}
+
+	ret = drm_proc_create_files(drm_proc_list, DRM_PROC_ENTRIES,
+				    minor->proc_root, minor);
+	if (ret) {
+		remove_proc_entry(name, root);
+		minor->proc_root = NULL;
+		DRM_ERROR("Failed to create core drm proc files\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int drm_proc_remove_files(const struct drm_info_list *files, int count,
+			  struct drm_minor *minor)
+{
+	struct list_head *pos, *q;
+	struct drm_info_node *tmp;
+	int i;
+
+	for (i = 0; i < count; i++) {
+		list_for_each_safe(pos, q, &minor->proc_nodes.list) {
+			tmp = list_entry(pos, struct drm_info_node, list);
+			if (tmp->info_ent == &files[i]) {
+				remove_proc_entry(files[i].name,
+						  minor->proc_root);
+				list_del(pos);
+				kfree(tmp);
+			}
+		}
+	}
+	return 0;
+}
+
+/**
+ * Cleanup the proc filesystem resources.
+ *
+ * \param minor device minor number.
+ * \param root DRI proc dir entry.
+ * \param dev_root DRI device proc dir entry.
+ * \return always zero.
+ *
+ * Remove all proc entries created by proc_init().
+ */
+int drm_proc_cleanup(struct drm_minor *minor, struct proc_dir_entry *root)
+{
+	char name[64];
+
+	if (!root || !minor->proc_root)
+		return 0;
+
+	drm_proc_remove_files(drm_proc_list, DRM_PROC_ENTRIES, minor);
+
+	sprintf(name, "%d", minor->index);
+	remove_proc_entry(name, root);
+
+	return 0;
+}
+