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authorThomas Zimmermann <tzimmermann@suse.de>2021-11-29 10:48:41 +0100
committerThomas Zimmermann <tzimmermann@suse.de>2021-11-30 09:41:28 +0100
commita21800bced7cbaf7bb8f5281db17a5d7ef6e197a (patch)
treeb71a940ac6f0db01084d74f22a17f1ddf5418975 /drivers/gpu/drm
parent2985c96485b7ef4e015d13dc3081fb0479260951 (diff)
drm: Declare hashtable as legacy
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
Diffstat (limited to 'drivers/gpu/drm')
-rw-r--r--drivers/gpu/drm/Makefile6
-rw-r--r--drivers/gpu/drm/drm_hashtab.c10
-rw-r--r--drivers/gpu/drm/drm_legacy.h40
3 files changed, 44 insertions, 12 deletions
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index fa16d3e0bbdc..9dbf91399343 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -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
diff --git a/drivers/gpu/drm/drm_hashtab.c b/drivers/gpu/drm/drm_hashtab.c
index c50fa6f0709f..60afa1865559 100644
--- a/drivers/gpu/drm/drm_hashtab.c
+++ b/drivers/gpu/drm/drm_hashtab.c
@@ -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);
diff --git a/drivers/gpu/drm/drm_legacy.h b/drivers/gpu/drm/drm_legacy.h
index c9206840c87f..70c9dba114a6 100644
--- a/drivers/gpu/drm/drm_legacy.h
+++ b/drivers/gpu/drm/drm_legacy.h
@@ -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