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drm: Declare hashtable as legacy

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The DRM hashtable code is only used by internal functions for legacy
UMS drivers. Move the implementation behind CONFIG_DRM_LEGACY and the
declarations into legacy header files. Unexport the symbols.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211129094841.22499-4-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2021-11-29 10:48:41 +01:00
parent 2985c96485
commit a21800bced
6 changed files with 59 additions and 96 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/gpu/drm/Makefile
View File

@ -6,7 +6,7 @@
drm-y := drm_aperture.o drm_auth.o drm_cache.o \
drm_file.o drm_gem.o drm_ioctl.o \
drm_drv.o \
drm_sysfs.o drm_hashtab.o drm_mm.o \
drm_sysfs.o drm_mm.o \
drm_crtc.o drm_fourcc.o drm_modes.o drm_edid.o drm_displayid.o \
drm_trace_points.o drm_prime.o \
drm_vma_manager.o \
@ -20,8 +20,8 @@ drm-y := drm_aperture.o drm_auth.o drm_cache.o \
drm_managed.o drm_vblank_work.o
drm-$(CONFIG_DRM_LEGACY) += drm_agpsupport.o drm_bufs.o drm_context.o drm_dma.o \
drm_irq.o drm_legacy_misc.o drm_lock.o drm_memory.o \
drm_scatter.o drm_vm.o
drm_hashtab.o drm_irq.o drm_legacy_misc.o drm_lock.o \
drm_memory.o drm_scatter.o drm_vm.o
drm-$(CONFIG_DRM_LIB_RANDOM) += lib/drm_random.o
drm-$(CONFIG_COMPAT) += drm_ioc32.o
drm-$(CONFIG_DRM_PANEL) += drm_panel.o

10
drivers/gpu/drm/drm_hashtab.c
View File

@ -32,16 +32,16 @@
* Thomas Hellström <thomas-at-tungstengraphics-dot-com>
*/
#include <linux/export.h>
#include <linux/hash.h>
#include <linux/mm.h>
#include <linux/rculist.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <drm/drm_hashtab.h>
#include <drm/drm_print.h>
#include "drm_legacy.h"
int drm_ht_create(struct drm_open_hash *ht, unsigned int order)
{
unsigned int size = 1 << order;
@ -58,7 +58,6 @@ int drm_ht_create(struct drm_open_hash *ht, unsigned int order)
}
return 0;
}
EXPORT_SYMBOL(drm_ht_create);
void drm_ht_verbose_list(struct drm_open_hash *ht, unsigned long key)
{
@ -135,7 +134,6 @@ int drm_ht_insert_item(struct drm_open_hash *ht, struct drm_hash_item *item)
}
return 0;
}
EXPORT_SYMBOL(drm_ht_insert_item);
/*
* Just insert an item and return any "bits" bit key that hasn't been
@ -164,7 +162,6 @@ int drm_ht_just_insert_please(struct drm_open_hash *ht, struct drm_hash_item *it
}
return 0;
}
EXPORT_SYMBOL(drm_ht_just_insert_please);
int drm_ht_find_item(struct drm_open_hash *ht, unsigned long key,
struct drm_hash_item **item)
@ -178,7 +175,6 @@ int drm_ht_find_item(struct drm_open_hash *ht, unsigned long key,
*item = hlist_entry(list, struct drm_hash_item, head);
return 0;
}
EXPORT_SYMBOL(drm_ht_find_item);
int drm_ht_remove_key(struct drm_open_hash *ht, unsigned long key)
{
@ -197,7 +193,6 @@ int drm_ht_remove_item(struct drm_open_hash *ht, struct drm_hash_item *item)
hlist_del_init_rcu(&item->head);
return 0;
}
EXPORT_SYMBOL(drm_ht_remove_item);
void drm_ht_remove(struct drm_open_hash *ht)
{
@ -206,4 +201,3 @@ void drm_ht_remove(struct drm_open_hash *ht)
ht->table = NULL;
}
}
EXPORT_SYMBOL(drm_ht_remove);

40
drivers/gpu/drm/drm_legacy.h
View File

@ -35,9 +35,47 @@
#include <drm/drm_legacy.h>
struct agp_memory;
struct drm_buf_desc;
struct drm_device;
struct drm_file;
struct drm_buf_desc;
struct drm_hash_item;
struct drm_open_hash;
/*
* Hash-table Support
*/
#define drm_hash_entry(_ptr, _type, _member) container_of(_ptr, _type, _member)
/* drm_hashtab.c */
#if IS_ENABLED(CONFIG_DRM_LEGACY)
int drm_ht_create(struct drm_open_hash *ht, unsigned int order);
int drm_ht_insert_item(struct drm_open_hash *ht, struct drm_hash_item *item);
int drm_ht_just_insert_please(struct drm_open_hash *ht, struct drm_hash_item *item,
unsigned long seed, int bits, int shift,
unsigned long add);
int drm_ht_find_item(struct drm_open_hash *ht, unsigned long key, struct drm_hash_item **item);
void drm_ht_verbose_list(struct drm_open_hash *ht, unsigned long key);
int drm_ht_remove_key(struct drm_open_hash *ht, unsigned long key);
int drm_ht_remove_item(struct drm_open_hash *ht, struct drm_hash_item *item);
void drm_ht_remove(struct drm_open_hash *ht);
#endif
/*
* RCU-safe interface
*
* The user of this API needs to make sure that two or more instances of the
* hash table manipulation functions are never run simultaneously.
* The lookup function drm_ht_find_item_rcu may, however, run simultaneously
* with any of the manipulation functions as long as it's called from within
* an RCU read-locked section.
*/
#define drm_ht_insert_item_rcu drm_ht_insert_item
#define drm_ht_just_insert_please_rcu drm_ht_just_insert_please
#define drm_ht_remove_key_rcu drm_ht_remove_key
#define drm_ht_remove_item_rcu drm_ht_remove_item
#define drm_ht_find_item_rcu drm_ht_find_item
/*
* Generic DRM Contexts

5
include/drm/drm_device.h
View File

@ -6,16 +6,13 @@
#include <linux/mutex.h>
#include <linux/idr.h>
#include <drm/drm_hashtab.h>
#include <drm/drm_legacy.h>
#include <drm/drm_mode_config.h>
struct drm_driver;
struct drm_minor;
struct drm_master;
struct drm_device_dma;
struct drm_vblank_crtc;
struct drm_sg_mem;
struct drm_local_map;
struct drm_vma_offset_manager;
struct drm_vram_mm;
struct drm_fb_helper;

79
include/drm/drm_hashtab.h
View File

@ -1,79 +0,0 @@
/**************************************************************************
*
* Copyright 2006 Tungsten Graphics, Inc., Bismack, ND. USA.
* 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, sub license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS, AUTHORS 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.
*
*
**************************************************************************/
/*
* Simple open hash tab implementation.
*
* Authors:
* Thomas Hellström <thomas-at-tungstengraphics-dot-com>
*/
#ifndef DRM_HASHTAB_H
#define DRM_HASHTAB_H
#include <linux/list.h>
#define drm_hash_entry(_ptr, _type, _member) container_of(_ptr, _type, _member)
struct drm_hash_item {
struct hlist_node head;
unsigned long key;
};
struct drm_open_hash {
struct hlist_head *table;
u8 order;
};
int drm_ht_create(struct drm_open_hash *ht, unsigned int order);
int drm_ht_insert_item(struct drm_open_hash *ht, struct drm_hash_item *item);
int drm_ht_just_insert_please(struct drm_open_hash *ht, struct drm_hash_item *item,
unsigned long seed, int bits, int shift,
unsigned long add);
int drm_ht_find_item(struct drm_open_hash *ht, unsigned long key, struct drm_hash_item **item);
void drm_ht_verbose_list(struct drm_open_hash *ht, unsigned long key);
int drm_ht_remove_key(struct drm_open_hash *ht, unsigned long key);
int drm_ht_remove_item(struct drm_open_hash *ht, struct drm_hash_item *item);
void drm_ht_remove(struct drm_open_hash *ht);
/*
* RCU-safe interface
*
* The user of this API needs to make sure that two or more instances of the
* hash table manipulation functions are never run simultaneously.
* The lookup function drm_ht_find_item_rcu may, however, run simultaneously
* with any of the manipulation functions as long as it's called from within
* an RCU read-locked section.
*/
#define drm_ht_insert_item_rcu drm_ht_insert_item
#define drm_ht_just_insert_please_rcu drm_ht_just_insert_please
#define drm_ht_remove_key_rcu drm_ht_remove_key
#define drm_ht_remove_item_rcu drm_ht_remove_item
#define drm_ht_find_item_rcu drm_ht_find_item
#endif

15
include/drm/drm_legacy.h
View File

@ -37,7 +37,6 @@
#include <drm/drm.h>
#include <drm/drm_auth.h>
#include <drm/drm_hashtab.h>
struct drm_device;
struct drm_driver;
@ -51,6 +50,20 @@ struct pci_driver;
* you're doing it terribly wrong.
*/
/*
* Hash-table Support
*/
struct drm_hash_item {
struct hlist_node head;
unsigned long key;
};
struct drm_open_hash {
struct hlist_head *table;
u8 order;
};
/**
* DMA buffer.
*/