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0dfda34ca5
Add a function for collecting the amount of memory used by driver model, including devices, uclasses and attached data and tags. This information can provide insights into how to reduce the memory required by driver model. Future work may look at execution speed also. Signed-off-by: Simon Glass <sjg@chromium.org>
132 lines
2.8 KiB
C
132 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (c) 2021 Linaro Limited
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* Author: AKASHI Takahiro
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*/
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#ifndef _DM_TAG_H
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#define _DM_TAG_H
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#include <linux/list.h>
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#include <linux/types.h>
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struct dm_stats;
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struct udevice;
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enum dm_tag_t {
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/* Types of core tags that can be attached to devices */
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DM_TAG_PLAT,
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DM_TAG_PARENT_PLAT,
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DM_TAG_UC_PLAT,
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DM_TAG_PRIV,
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DM_TAG_PARENT_PRIV,
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DM_TAG_UC_PRIV,
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DM_TAG_DRIVER_DATA,
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DM_TAG_ATTACH_COUNT,
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/* EFI_LOADER */
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DM_TAG_EFI = DM_TAG_ATTACH_COUNT,
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DM_TAG_COUNT,
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};
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/**
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* dmtag_node
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*
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* @sibling: List of dm-tag nodes
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* @dev: Associated udevice
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* @tag: Tag type
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* @ptr: Pointer as a value
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* @val: Value
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*/
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struct dmtag_node {
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struct list_head sibling;
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struct udevice *dev;
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enum dm_tag_t tag;
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union {
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void *ptr;
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ulong val;
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};
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};
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/**
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* dev_tag_set_ptr() - set a tag's value as a pointer
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* @dev: Device to operate
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* @tag: Tag type
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* @ptr: Pointer to set
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*
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* Set the value, @ptr, as of @tag associated with the device, @dev
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*
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* Return: 0 on success, -ve on error
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*/
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int dev_tag_set_ptr(struct udevice *dev, enum dm_tag_t tag, void *ptr);
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/**
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* dev_tag_set_val() set a tag's value as an integer
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* @dev: Device to operate
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* @tag: Tag type
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* @val: Value to set
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*
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* Set the value, @val, as of @tag associated with the device, @dev
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*
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* Return: on success, -ve on error
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*/
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int dev_tag_set_val(struct udevice *dev, enum dm_tag_t tag, ulong val);
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/**
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* dev_tag_get_ptr() - get a tag's value as a pointer
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* @dev: Device to operate
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* @tag: Tag type
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* @ptrp: Pointer to tag's value (pointer)
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*
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* Get a tag's value as a pointer
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*
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* Return: on success, -ve on error
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*/
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int dev_tag_get_ptr(struct udevice *dev, enum dm_tag_t tag, void **ptrp);
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/**
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* dev_tag_get_val() - get a tag's value as an integer
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* @dev: Device to operate
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* @tag: Tag type
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* @valp: Pointer to tag's value (ulong)
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*
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* Get a tag's value as an integer
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*
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* Return: 0 on success, -ve on error
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*/
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int dev_tag_get_val(struct udevice *dev, enum dm_tag_t tag, ulong *valp);
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/**
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* dev_tag_del() - delete a tag
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* @dev: Device to operate
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* @tag: Tag type
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*
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* Delete a tag of @tag associated with the device, @dev
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*
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* Return: 0 on success, -ve on error
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*/
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int dev_tag_del(struct udevice *dev, enum dm_tag_t tag);
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/**
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* dev_tag_del_all() - delete all tags
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* @dev: Device to operate
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*
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* Delete all the tags associated with the device, @dev
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*
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* Return: 0 on success, -ve on error
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*/
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int dev_tag_del_all(struct udevice *dev);
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/**
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* dev_tag_collect_stats() - Collect information on driver model performance
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*
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* This collects information on how driver model is performing. For now it only
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* includes memory usage
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*
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* @stats: Place to put the collected information
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*/
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void dev_tag_collect_stats(struct dm_stats *stats);
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#endif /* _DM_TAG_H */
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