drivers/gpu/drm/nouveau/nouveau_debugfs.c - linux - Git at Google

 /*
  * 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)
 		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)
 		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,
 };

 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},
 };

 int
 nouveau_drm_debugfs_init(struct drm_minor *minor)
 {
 	struct nouveau_drm *drm = nouveau_drm(minor->dev);
 	struct dentry *dentry;
 	int i, ret;

 	for (i = 0; i < ARRAY_SIZE(nouveau_debugfs_files); i++) {
 		dentry = debugfs_create_file(nouveau_debugfs_files[i].name,
 					     S_IRUGO | S_IWUSR,
 					     minor->debugfs_root, minor->dev,
 					     nouveau_debugfs_files[i].fops);
 		if (!dentry)
 			return -ENOMEM;
 	}

 	ret = drm_debugfs_create_files(nouveau_debugfs_list,
 				       NOUVEAU_DEBUGFS_ENTRIES,
 				       minor->debugfs_root, minor);
 	if (ret)
 		return ret;

 	/* 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 0;

 	d_inode(dentry)->i_size = drm->vbios.length;
 	dput(dentry);

 	return 0;
 }

 int
 nouveau_debugfs_init(struct nouveau_drm *drm)
 {
 	int ret;

 	drm->debugfs = kzalloc(sizeof(*drm->debugfs), GFP_KERNEL);
 	if (!drm->debugfs)
 		return -ENOMEM;

 	ret = nvif_object_init(&drm->client.device.object, 0,
 			       NVIF_CLASS_CONTROL, NULL, 0,
 			       &drm->debugfs->ctrl);
 	if (ret)
 		return ret;

 	return 0;
 }

 void
 nouveau_debugfs_fini(struct nouveau_drm *drm)
 {
 	if (drm->debugfs && drm->debugfs->ctrl.priv)
 		nvif_object_fini(&drm->debugfs->ctrl);

 	kfree(drm->debugfs);
 	drm->debugfs = NULL;
 }
	/*
	* 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)
	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)
	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,
	};

	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},
	};

	int
	nouveau_drm_debugfs_init(struct drm_minor *minor)
	{
	struct nouveau_drm *drm = nouveau_drm(minor->dev);
	struct dentry *dentry;
	int i, ret;

	for (i = 0; i < ARRAY_SIZE(nouveau_debugfs_files); i++) {
	dentry = debugfs_create_file(nouveau_debugfs_files[i].name,
	S_IRUGO \| S_IWUSR,
	minor->debugfs_root, minor->dev,
	nouveau_debugfs_files[i].fops);
	if (!dentry)
	return -ENOMEM;
	}

	ret = drm_debugfs_create_files(nouveau_debugfs_list,
	NOUVEAU_DEBUGFS_ENTRIES,
	minor->debugfs_root, minor);
	if (ret)
	return ret;

	/* 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 0;

	d_inode(dentry)->i_size = drm->vbios.length;
	dput(dentry);

	return 0;
	}

	int
	nouveau_debugfs_init(struct nouveau_drm *drm)
	{
	int ret;

	drm->debugfs = kzalloc(sizeof(*drm->debugfs), GFP_KERNEL);
	if (!drm->debugfs)
	return -ENOMEM;

	ret = nvif_object_init(&drm->client.device.object, 0,
	NVIF_CLASS_CONTROL, NULL, 0,
	&drm->debugfs->ctrl);
	if (ret)
	return ret;

	return 0;
	}

	void
	nouveau_debugfs_fini(struct nouveau_drm *drm)
	{
	if (drm->debugfs && drm->debugfs->ctrl.priv)
	nvif_object_fini(&drm->debugfs->ctrl);

	kfree(drm->debugfs);
	drm->debugfs = NULL;
	}