1 files changed, 275 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_debugfs.c b/drivers/gpu/drm/nouveau/nouveau_debugfs.c
new file mode 100644
index 000000000..2a36d1ca8
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nouveau_debugfs.c
@@ -0,0 +1,275 @@
+/*
+ * Copyright (C) 2009 Red Hat <bskeggs@redhat.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 THE COPYRIGHT OWNER(S) 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.
+ *
+ */
+
+/*
+ * Authors:
+ *  Ben Skeggs <bskeggs@redhat.com>
+ */
+
+#include <linux/debugfs.h>
+#include <nvif/class.h>
+#include <nvif/if0001.h>
+#include "nouveau_debugfs.h"
+#include "nouveau_drv.h"
+
+static int
+nouveau_debugfs_vbios_image(struct seq_file *m, void *data)
+{
+	struct drm_info_node *node = (struct drm_info_node *) m->private;
+	struct nouveau_drm *drm = nouveau_drm(node->minor->dev);
+	int i;
+
+	for (i = 0; i < drm->vbios.length; i++)
+		seq_printf(m, "%c", drm->vbios.data[i]);
+	return 0;
+}
+
+static int
+nouveau_debugfs_strap_peek(struct seq_file *m, void *data)
+{
+	struct drm_info_node *node = m->private;
+	struct nouveau_drm *drm = nouveau_drm(node->minor->dev);
+	int ret;
+
+	ret = pm_runtime_get_sync(drm->dev->dev);
+	if (ret < 0 && ret != -EACCES) {
+		pm_runtime_put_autosuspend(drm->dev->dev);
+		return ret;
+	}
+
+	seq_printf(m, "0x%08x\n",
+		   nvif_rd32(&drm->client.device.object, 0x101000));
+
+	pm_runtime_mark_last_busy(drm->dev->dev);
+	pm_runtime_put_autosuspend(drm->dev->dev);
+
+	return 0;
+}
+
+static int
+nouveau_debugfs_pstate_get(struct seq_file *m, void *data)
+{
+	struct drm_device *drm = m->private;
+	struct nouveau_debugfs *debugfs = nouveau_debugfs(drm);
+	struct nvif_object *ctrl = &debugfs->ctrl;
+	struct nvif_control_pstate_info_v0 info = {};
+	int ret, i;
+
+	if (!debugfs)
+		return -ENODEV;
+
+	ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_INFO, &info, sizeof(info));
+	if (ret)
+		return ret;
+
+	for (i = 0; i < info.count + 1; i++) {
+		const s32 state = i < info.count ? i :
+			NVIF_CONTROL_PSTATE_ATTR_V0_STATE_CURRENT;
+		struct nvif_control_pstate_attr_v0 attr = {
+			.state = state,
+			.index = 0,
+		};
+
+		ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_ATTR,
+				&attr, sizeof(attr));
+		if (ret)
+			return ret;
+
+		if (i < info.count)
+			seq_printf(m, "%02x:", attr.state);
+		else
+			seq_printf(m, "%s:", info.pwrsrc == 0 ? "DC" :
+					     info.pwrsrc == 1 ? "AC" : "--");
+
+		attr.index = 0;
+		do {
+			attr.state = state;
+			ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_ATTR,
+					&attr, sizeof(attr));
+			if (ret)
+				return ret;
+
+			seq_printf(m, " %s %d", attr.name, attr.min);
+			if (attr.min != attr.max)
+				seq_printf(m, "-%d", attr.max);
+			seq_printf(m, " %s", attr.unit);
+		} while (attr.index);
+
+		if (state >= 0) {
+			if (info.ustate_ac == state)
+				seq_printf(m, " AC");
+			if (info.ustate_dc == state)
+				seq_printf(m, " DC");
+			if (info.pstate == state)
+				seq_printf(m, " *");
+		} else {
+			if (info.ustate_ac < -1)
+				seq_printf(m, " AC");
+			if (info.ustate_dc < -1)
+				seq_printf(m, " DC");
+		}
+
+		seq_printf(m, "\n");
+	}
+
+	return 0;
+}
+
+static ssize_t
+nouveau_debugfs_pstate_set(struct file *file, const char __user *ubuf,
+			   size_t len, loff_t *offp)
+{
+	struct seq_file *m = file->private_data;
+	struct drm_device *drm = m->private;
+	struct nouveau_debugfs *debugfs = nouveau_debugfs(drm);
+	struct nvif_object *ctrl = &debugfs->ctrl;
+	struct nvif_control_pstate_user_v0 args = { .pwrsrc = -EINVAL };
+	char buf[32] = {}, *tmp, *cur = buf;
+	long value, ret;
+
+	if (!debugfs)
+		return -ENODEV;
+
+	if (len >= sizeof(buf))
+		return -EINVAL;
+
+	if (copy_from_user(buf, ubuf, len))
+		return -EFAULT;
+
+	if ((tmp = strchr(buf, '\n')))
+		*tmp = '\0';
+
+	if (!strncasecmp(cur, "dc:", 3)) {
+		args.pwrsrc = 0;
+		cur += 3;
+	} else
+	if (!strncasecmp(cur, "ac:", 3)) {
+		args.pwrsrc = 1;
+		cur += 3;
+	}
+
+	if (!strcasecmp(cur, "none"))
+		args.ustate = NVIF_CONTROL_PSTATE_USER_V0_STATE_UNKNOWN;
+	else
+	if (!strcasecmp(cur, "auto"))
+		args.ustate = NVIF_CONTROL_PSTATE_USER_V0_STATE_PERFMON;
+	else {
+		ret = kstrtol(cur, 16, &value);
+		if (ret)
+			return ret;
+		args.ustate = value;
+	}
+
+	ret = pm_runtime_get_sync(drm->dev);
+	if (ret < 0 && ret != -EACCES) {
+		pm_runtime_put_autosuspend(drm->dev);
+		return ret;
+	}
+
+	ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_USER, &args, sizeof(args));
+	pm_runtime_put_autosuspend(drm->dev);
+	if (ret < 0)
+		return ret;
+
+	return len;
+}
+
+static int
+nouveau_debugfs_pstate_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, nouveau_debugfs_pstate_get, inode->i_private);
+}
+
+static const struct file_operations nouveau_pstate_fops = {
+	.owner = THIS_MODULE,
+	.open = nouveau_debugfs_pstate_open,
+	.read = seq_read,
+	.write = nouveau_debugfs_pstate_set,
+	.release = single_release,
+};
+
+static struct drm_info_list nouveau_debugfs_list[] = {
+	{ "vbios.rom",  nouveau_debugfs_vbios_image, 0, NULL },
+	{ "strap_peek", nouveau_debugfs_strap_peek, 0, NULL },
+};
+#define NOUVEAU_DEBUGFS_ENTRIES ARRAY_SIZE(nouveau_debugfs_list)
+
+static const struct nouveau_debugfs_files {
+	const char *name;
+	const struct file_operations *fops;
+} nouveau_debugfs_files[] = {
+	{"pstate", &nouveau_pstate_fops},
+};
+
+void
+nouveau_drm_debugfs_init(struct drm_minor *minor)
+{
+	struct nouveau_drm *drm = nouveau_drm(minor->dev);
+	struct dentry *dentry;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(nouveau_debugfs_files); i++) {
+		debugfs_create_file(nouveau_debugfs_files[i].name,
+				    S_IRUGO | S_IWUSR,
+				    minor->debugfs_root, minor->dev,
+				    nouveau_debugfs_files[i].fops);
+	}
+
+	drm_debugfs_create_files(nouveau_debugfs_list,
+				 NOUVEAU_DEBUGFS_ENTRIES,
+				 minor->debugfs_root, minor);
+
+	/* Set the size of the vbios since we know it, and it's confusing to
+	 * userspace if it wants to seek() but the file has a length of 0
+	 */
+	dentry = debugfs_lookup("vbios.rom", minor->debugfs_root);
+	if (!dentry)
+		return;
+
+	d_inode(dentry)->i_size = drm->vbios.length;
+	dput(dentry);
+}
+
+int
+nouveau_debugfs_init(struct nouveau_drm *drm)
+{
+	drm->debugfs = kzalloc(sizeof(*drm->debugfs), GFP_KERNEL);
+	if (!drm->debugfs)
+		return -ENOMEM;
+
+	return nvif_object_ctor(&drm->client.device.object, "debugfsCtrl", 0,
+				NVIF_CLASS_CONTROL, NULL, 0,
+				&drm->debugfs->ctrl);
+}
+
+void
+nouveau_debugfs_fini(struct nouveau_drm *drm)
+{
+	if (drm->debugfs && drm->debugfs->ctrl.priv)
+		nvif_object_dtor(&drm->debugfs->ctrl);
+
+	kfree(drm->debugfs);
+	drm->debugfs = NULL;
+}