Initial import

1 files changed, 422 insertions, 0 deletions

diff --git a/drivers/gpu/drm/drm_debugfs.c b/drivers/gpu/drm/drm_debugfs.c
new file mode 100644
index 000000000..3bcf8e6a8
--- /dev/null
+++ b/drivers/gpu/drm/drm_debugfs.c
@@ -0,0 +1,422 @@
+/**
+ * \file drm_debugfs.c
+ * debugfs support for DRM
+ *
+ * \author Ben Gamari <bgamari@gmail.com>
+ */
+
+/*
+ * Created: Sun Dec 21 13:08:50 2008 by bgamari@gmail.com
+ *
+ * Copyright 2008 Ben Gamari <bgamari@gmail.com>
+ *
+ * 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/debugfs.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/export.h>
+#include <drm/drmP.h>
+#include <drm/drm_edid.h>
+#include "drm_internal.h"
+
+#if defined(CONFIG_DEBUG_FS)
+
+/***************************************************
+ * Initialization, etc.
+ **************************************************/
+
+static const struct drm_info_list drm_debugfs_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},
+	{"vma", drm_vma_info, 0},
+};
+#define DRM_DEBUGFS_ENTRIES ARRAY_SIZE(drm_debugfs_list)
+
+
+static int drm_debugfs_open(struct inode *inode, struct file *file)
+{
+	struct drm_info_node *node = inode->i_private;
+
+	return single_open(file, node->info_ent->show, node);
+}
+
+
+static const struct file_operations drm_debugfs_fops = {
+	.owner = THIS_MODULE,
+	.open = drm_debugfs_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+
+
+/**
+ * Initialize a given set of debugfs files for a device
+ *
+ * \param files The array of files to create
+ * \param count The number of files given
+ * \param root DRI debugfs dir entry.
+ * \param minor device minor number
+ * \return Zero on success, non-zero on failure
+ *
+ * Create a given set of debugfs files represented by an array of
+ * gdm_debugfs_lists in the given root directory.
+ */
+int drm_debugfs_create_files(const struct drm_info_list *files, int count,
+			     struct dentry *root, struct drm_minor *minor)
+{
+	struct drm_device *dev = minor->dev;
+	struct dentry *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;
+		}
+		ent = debugfs_create_file(files[i].name, S_IFREG | S_IRUGO,
+					  root, tmp, &drm_debugfs_fops);
+		if (!ent) {
+			DRM_ERROR("Cannot create /sys/kernel/debug/dri/%s/%s\n",
+				  root->d_name.name, files[i].name);
+			kfree(tmp);
+			ret = -1;
+			goto fail;
+		}
+
+		tmp->minor = minor;
+		tmp->dent = ent;
+		tmp->info_ent = &files[i];
+
+		mutex_lock(&minor->debugfs_lock);
+		list_add(&tmp->list, &minor->debugfs_list);
+		mutex_unlock(&minor->debugfs_lock);
+	}
+	return 0;
+
+fail:
+	drm_debugfs_remove_files(files, count, minor);
+	return ret;
+}
+EXPORT_SYMBOL(drm_debugfs_create_files);
+
+/**
+ * Initialize the DRI debugfs filesystem for a device
+ *
+ * \param dev DRM device
+ * \param minor device minor number
+ * \param root DRI debugfs dir entry.
+ *
+ * Create the DRI debugfs root entry "/sys/kernel/debug/dri", the device debugfs root entry
+ * "/sys/kernel/debug/dri/%minor%/", and each entry in debugfs_list as
+ * "/sys/kernel/debug/dri/%minor%/%name%".
+ */
+int drm_debugfs_init(struct drm_minor *minor, int minor_id,
+		     struct dentry *root)
+{
+	struct drm_device *dev = minor->dev;
+	char name[64];
+	int ret;
+
+	INIT_LIST_HEAD(&minor->debugfs_list);
+	mutex_init(&minor->debugfs_lock);
+	sprintf(name, "%d", minor_id);
+	minor->debugfs_root = debugfs_create_dir(name, root);
+	if (!minor->debugfs_root) {
+		DRM_ERROR("Cannot create /sys/kernel/debug/dri/%s\n", name);
+		return -1;
+	}
+
+	ret = drm_debugfs_create_files(drm_debugfs_list, DRM_DEBUGFS_ENTRIES,
+				       minor->debugfs_root, minor);
+	if (ret) {
+		debugfs_remove(minor->debugfs_root);
+		minor->debugfs_root = NULL;
+		DRM_ERROR("Failed to create core drm debugfs files\n");
+		return ret;
+	}
+
+	if (dev->driver->debugfs_init) {
+		ret = dev->driver->debugfs_init(minor);
+		if (ret) {
+			DRM_ERROR("DRM: Driver failed to initialize "
+				  "/sys/kernel/debug/dri.\n");
+			return ret;
+		}
+	}
+	return 0;
+}
+
+
+/**
+ * Remove a list of debugfs files
+ *
+ * \param files The list of files
+ * \param count The number of files
+ * \param minor The minor of which we should remove the files
+ * \return always zero.
+ *
+ * Remove all debugfs entries created by debugfs_init().
+ */
+int drm_debugfs_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;
+
+	mutex_lock(&minor->debugfs_lock);
+	for (i = 0; i < count; i++) {
+		list_for_each_safe(pos, q, &minor->debugfs_list) {
+			tmp = list_entry(pos, struct drm_info_node, list);
+			if (tmp->info_ent == &files[i]) {
+				debugfs_remove(tmp->dent);
+				list_del(pos);
+				kfree(tmp);
+			}
+		}
+	}
+	mutex_unlock(&minor->debugfs_lock);
+	return 0;
+}
+EXPORT_SYMBOL(drm_debugfs_remove_files);
+
+/**
+ * Cleanup the debugfs filesystem resources.
+ *
+ * \param minor device minor number.
+ * \return always zero.
+ *
+ * Remove all debugfs entries created by debugfs_init().
+ */
+int drm_debugfs_cleanup(struct drm_minor *minor)
+{
+	struct drm_device *dev = minor->dev;
+
+	if (!minor->debugfs_root)
+		return 0;
+
+	if (dev->driver->debugfs_cleanup)
+		dev->driver->debugfs_cleanup(minor);
+
+	drm_debugfs_remove_files(drm_debugfs_list, DRM_DEBUGFS_ENTRIES, minor);
+
+	debugfs_remove(minor->debugfs_root);
+	minor->debugfs_root = NULL;
+
+	return 0;
+}
+
+static int connector_show(struct seq_file *m, void *data)
+{
+	struct drm_connector *connector = m->private;
+	const char *status;
+
+	switch (connector->force) {
+	case DRM_FORCE_ON:
+		status = "on\n";
+		break;
+
+	case DRM_FORCE_ON_DIGITAL:
+		status = "digital\n";
+		break;
+
+	case DRM_FORCE_OFF:
+		status = "off\n";
+		break;
+
+	case DRM_FORCE_UNSPECIFIED:
+		status = "unspecified\n";
+		break;
+
+	default:
+		return 0;
+	}
+
+	seq_puts(m, status);
+
+	return 0;
+}
+
+static int connector_open(struct inode *inode, struct file *file)
+{
+	struct drm_connector *dev = inode->i_private;
+
+	return single_open(file, connector_show, dev);
+}
+
+static ssize_t connector_write(struct file *file, const char __user *ubuf,
+			       size_t len, loff_t *offp)
+{
+	struct seq_file *m = file->private_data;
+	struct drm_connector *connector = m->private;
+	char buf[12];
+
+	if (len > sizeof(buf) - 1)
+		return -EINVAL;
+
+	if (copy_from_user(buf, ubuf, len))
+		return -EFAULT;
+
+	buf[len] = '\0';
+
+	if (!strcmp(buf, "on"))
+		connector->force = DRM_FORCE_ON;
+	else if (!strcmp(buf, "digital"))
+		connector->force = DRM_FORCE_ON_DIGITAL;
+	else if (!strcmp(buf, "off"))
+		connector->force = DRM_FORCE_OFF;
+	else if (!strcmp(buf, "unspecified"))
+		connector->force = DRM_FORCE_UNSPECIFIED;
+	else
+		return -EINVAL;
+
+	return len;
+}
+
+static int edid_show(struct seq_file *m, void *data)
+{
+	struct drm_connector *connector = m->private;
+	struct drm_property_blob *edid = connector->edid_blob_ptr;
+
+	if (connector->override_edid && edid)
+		seq_write(m, edid->data, edid->length);
+
+	return 0;
+}
+
+static int edid_open(struct inode *inode, struct file *file)
+{
+	struct drm_connector *dev = inode->i_private;
+
+	return single_open(file, edid_show, dev);
+}
+
+static ssize_t edid_write(struct file *file, const char __user *ubuf,
+			  size_t len, loff_t *offp)
+{
+	struct seq_file *m = file->private_data;
+	struct drm_connector *connector = m->private;
+	char *buf;
+	struct edid *edid;
+	int ret;
+
+	buf = memdup_user(ubuf, len);
+	if (IS_ERR(buf))
+		return PTR_ERR(buf);
+
+	edid = (struct edid *) buf;
+
+	if (len == 5 && !strncmp(buf, "reset", 5)) {
+		connector->override_edid = false;
+		ret = drm_mode_connector_update_edid_property(connector, NULL);
+	} else if (len < EDID_LENGTH ||
+		   EDID_LENGTH * (1 + edid->extensions) > len)
+		ret = -EINVAL;
+	else {
+		connector->override_edid = false;
+		ret = drm_mode_connector_update_edid_property(connector, edid);
+		if (!ret)
+			connector->override_edid = true;
+	}
+
+	kfree(buf);
+
+	return (ret) ? ret : len;
+}
+
+static const struct file_operations drm_edid_fops = {
+	.owner = THIS_MODULE,
+	.open = edid_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+	.write = edid_write
+};
+
+
+static const struct file_operations drm_connector_fops = {
+	.owner = THIS_MODULE,
+	.open = connector_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+	.write = connector_write
+};
+
+int drm_debugfs_connector_add(struct drm_connector *connector)
+{
+	struct drm_minor *minor = connector->dev->primary;
+	struct dentry *root, *ent;
+
+	if (!minor->debugfs_root)
+		return -1;
+
+	root = debugfs_create_dir(connector->name, minor->debugfs_root);
+	if (!root)
+		return -ENOMEM;
+
+	connector->debugfs_entry = root;
+
+	/* force */
+	ent = debugfs_create_file("force", S_IRUGO | S_IWUSR, root, connector,
+				  &drm_connector_fops);
+	if (!ent)
+		goto error;
+
+	/* edid */
+	ent = debugfs_create_file("edid_override", S_IRUGO | S_IWUSR, root,
+				  connector, &drm_edid_fops);
+	if (!ent)
+		goto error;
+
+	return 0;
+
+error:
+	debugfs_remove_recursive(connector->debugfs_entry);
+	connector->debugfs_entry = NULL;
+	return -ENOMEM;
+}
+
+void drm_debugfs_connector_remove(struct drm_connector *connector)
+{
+	if (!connector->debugfs_entry)
+		return;
+
+	debugfs_remove_recursive(connector->debugfs_entry);
+
+	connector->debugfs_entry = NULL;
+}
+
+#endif /* CONFIG_DEBUG_FS */
+