Import the drm_global references helpers.
Sponsored by: The FreeBSD Foundation MFC after: 1 month
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2020-12-20 02:59:44 +00:00
svn path=/head/; revision=247834
109
sys/dev/drm2/drm_global.c
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109
sys/dev/drm2/drm_global.c
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/**************************************************************************
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*
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* Copyright 2008-2009 VMware, Inc., Palo Alto, CA., USA
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/*
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* Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <dev/drm2/drmP.h>
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#include <dev/drm2/drm_global.h>
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MALLOC_DEFINE(M_DRM_GLOBAL, "drm_global", "DRM Global Items");
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struct drm_global_item {
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struct sx mutex;
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void *object;
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int refcount;
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};
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static struct drm_global_item glob[DRM_GLOBAL_NUM];
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void drm_global_init(void)
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{
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int i;
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for (i = 0; i < DRM_GLOBAL_NUM; ++i) {
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struct drm_global_item *item = &glob[i];
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sx_init(&item->mutex, "drmgi");
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item->object = NULL;
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item->refcount = 0;
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}
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}
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void drm_global_release(void)
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{
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int i;
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for (i = 0; i < DRM_GLOBAL_NUM; ++i) {
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struct drm_global_item *item = &glob[i];
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MPASS(item->object == NULL);
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MPASS(item->refcount == 0);
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}
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}
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int drm_global_item_ref(struct drm_global_reference *ref)
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{
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int ret;
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struct drm_global_item *item = &glob[ref->global_type];
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void *object;
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sx_xlock(&item->mutex);
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if (item->refcount == 0) {
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item->object = malloc(ref->size, M_DRM_GLOBAL,
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M_WAITOK | M_ZERO);
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ref->object = item->object;
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ret = ref->init(ref);
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if (unlikely(ret != 0))
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goto out_err;
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}
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++item->refcount;
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ref->object = item->object;
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object = item->object;
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sx_xunlock(&item->mutex);
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return 0;
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out_err:
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sx_xunlock(&item->mutex);
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item->object = NULL;
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return ret;
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}
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void drm_global_item_unref(struct drm_global_reference *ref)
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{
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struct drm_global_item *item = &glob[ref->global_type];
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sx_xlock(&item->mutex);
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MPASS(item->refcount != 0);
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MPASS(ref->object == item->object);
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if (--item->refcount == 0) {
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ref->release(ref);
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item->object = NULL;
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}
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sx_xunlock(&item->mutex);
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}
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56
sys/dev/drm2/drm_global.h
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56
sys/dev/drm2/drm_global.h
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@ -0,0 +1,56 @@
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/**************************************************************************
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*
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* Copyright 2008-2009 VMware, Inc., Palo Alto, CA., USA
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/*
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* Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
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*/
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/* $FreeBSD$ */
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#ifndef _DRM_GLOBAL_H_
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#define _DRM_GLOBAL_H_
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enum drm_global_types {
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DRM_GLOBAL_TTM_MEM = 0,
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DRM_GLOBAL_TTM_BO,
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DRM_GLOBAL_TTM_OBJECT,
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DRM_GLOBAL_NUM
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};
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struct drm_global_reference {
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enum drm_global_types global_type;
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size_t size;
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void *object;
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int (*init) (struct drm_global_reference *);
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void (*release) (struct drm_global_reference *);
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};
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extern void drm_global_init(void);
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extern void drm_global_release(void);
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extern int drm_global_item_ref(struct drm_global_reference *ref);
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extern void drm_global_item_unref(struct drm_global_reference *ref);
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MALLOC_DECLARE(M_DRM_GLOBAL);
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#endif
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@ -18,6 +18,7 @@ SRCS = \
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drm_fops.c \
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drm_gem.c \
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drm_gem_names.c \
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drm_global.c \
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drm_hashtab.c \
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drm_ioctl.c \
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drm_irq.c \
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