From 9cfa0e9e3c91d879ca7c2ad181b396dcf4836802 Mon Sep 17 00:00:00 2001 From: Konstantin Belousov Date: Tue, 5 Mar 2013 09:27:21 +0000 Subject: [PATCH] Import the drm_global references helpers. Sponsored by: The FreeBSD Foundation MFC after: 1 month --- sys/dev/drm2/drm_global.c | 109 +++++++++++++++++++++++++++++++++ sys/dev/drm2/drm_global.h | 56 +++++++++++++++++ sys/modules/drm2/drm2/Makefile | 1 + 3 files changed, 166 insertions(+) create mode 100644 sys/dev/drm2/drm_global.c create mode 100644 sys/dev/drm2/drm_global.h diff --git a/sys/dev/drm2/drm_global.c b/sys/dev/drm2/drm_global.c new file mode 100644 index 000000000000..df208c819ad1 --- /dev/null +++ b/sys/dev/drm2/drm_global.c @@ -0,0 +1,109 @@ +/************************************************************************** + * + * Copyright 2008-2009 VMware, Inc., Palo Alto, CA., 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. + * + **************************************************************************/ +/* + * Authors: Thomas Hellstrom + */ + +#include +__FBSDID("$FreeBSD$"); + +#include +#include + +MALLOC_DEFINE(M_DRM_GLOBAL, "drm_global", "DRM Global Items"); + +struct drm_global_item { + struct sx mutex; + void *object; + int refcount; +}; + +static struct drm_global_item glob[DRM_GLOBAL_NUM]; + +void drm_global_init(void) +{ + int i; + + for (i = 0; i < DRM_GLOBAL_NUM; ++i) { + struct drm_global_item *item = &glob[i]; + sx_init(&item->mutex, "drmgi"); + item->object = NULL; + item->refcount = 0; + } +} + +void drm_global_release(void) +{ + int i; + for (i = 0; i < DRM_GLOBAL_NUM; ++i) { + struct drm_global_item *item = &glob[i]; + MPASS(item->object == NULL); + MPASS(item->refcount == 0); + } +} + +int drm_global_item_ref(struct drm_global_reference *ref) +{ + int ret; + struct drm_global_item *item = &glob[ref->global_type]; + void *object; + + sx_xlock(&item->mutex); + if (item->refcount == 0) { + item->object = malloc(ref->size, M_DRM_GLOBAL, + M_WAITOK | M_ZERO); + + ref->object = item->object; + ret = ref->init(ref); + if (unlikely(ret != 0)) + goto out_err; + + } + ++item->refcount; + ref->object = item->object; + object = item->object; + sx_xunlock(&item->mutex); + return 0; +out_err: + sx_xunlock(&item->mutex); + item->object = NULL; + return ret; +} + +void drm_global_item_unref(struct drm_global_reference *ref) +{ + struct drm_global_item *item = &glob[ref->global_type]; + + sx_xlock(&item->mutex); + MPASS(item->refcount != 0); + MPASS(ref->object == item->object); + if (--item->refcount == 0) { + ref->release(ref); + item->object = NULL; + } + sx_xunlock(&item->mutex); +} diff --git a/sys/dev/drm2/drm_global.h b/sys/dev/drm2/drm_global.h new file mode 100644 index 000000000000..f45b015a7c5e --- /dev/null +++ b/sys/dev/drm2/drm_global.h @@ -0,0 +1,56 @@ +/************************************************************************** + * + * Copyright 2008-2009 VMware, Inc., Palo Alto, CA., 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. + * + **************************************************************************/ +/* + * Authors: Thomas Hellstrom + */ +/* $FreeBSD$ */ + +#ifndef _DRM_GLOBAL_H_ +#define _DRM_GLOBAL_H_ +enum drm_global_types { + DRM_GLOBAL_TTM_MEM = 0, + DRM_GLOBAL_TTM_BO, + DRM_GLOBAL_TTM_OBJECT, + DRM_GLOBAL_NUM +}; + +struct drm_global_reference { + enum drm_global_types global_type; + size_t size; + void *object; + int (*init) (struct drm_global_reference *); + void (*release) (struct drm_global_reference *); +}; + +extern void drm_global_init(void); +extern void drm_global_release(void); +extern int drm_global_item_ref(struct drm_global_reference *ref); +extern void drm_global_item_unref(struct drm_global_reference *ref); + +MALLOC_DECLARE(M_DRM_GLOBAL); + +#endif diff --git a/sys/modules/drm2/drm2/Makefile b/sys/modules/drm2/drm2/Makefile index 1bc979d67884..efaf61d3a84f 100644 --- a/sys/modules/drm2/drm2/Makefile +++ b/sys/modules/drm2/drm2/Makefile @@ -18,6 +18,7 @@ SRCS = \ drm_fops.c \ drm_gem.c \ drm_gem_names.c \ + drm_global.c \ drm_hashtab.c \ drm_ioctl.c \ drm_irq.c \