This reverts commit 2bb42410b1bd324912389c6ac748df1c1befd69f.
Signed-off-by: Karol Herbst <kher...@redhat.com>
---
drivers/gpu/drm/Makefile | 2 +-
drivers/gpu/drm/drm_drv.c | 2 +
drivers/gpu/drm/drm_global.c | 137 ++++++++++++++++++++++++++++++++
include/drm/drmP.h | 1 +
include/drm/drm_global.h | 53 ++++++++++++
include/drm/ttm/ttm_bo_driver.h | 1 +
6 files changed, 195 insertions(+), 1 deletion(-)
create mode 100644 drivers/gpu/drm/drm_global.c
create mode 100644 include/drm/drm_global.h
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index ce8d1d384319..a3a19e9020e3 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -11,7 +11,7 @@ drm-y := drm_auth.o drm_bufs.o drm_cache.o \
drm_sysfs.o drm_hashtab.o drm_mm.o \
drm_crtc.o drm_fourcc.o drm_modes.o drm_edid.o \
drm_encoder_slave.o \
- drm_trace_points.o drm_prime.o \
+ drm_trace_points.o drm_global.o drm_prime.o \
drm_rect.o drm_vma_manager.o drm_flip_work.o \
drm_modeset_lock.o drm_atomic.o drm_bridge.o \
drm_framebuffer.o drm_connector.o drm_blend.o \
diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index 12e5e2be7890..5f7e99bf4fa4 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -960,12 +960,14 @@ static void drm_core_exit(void)
drm_sysfs_destroy();
idr_destroy(&drm_minors_idr);
drm_connector_ida_destroy();
+ drm_global_release();
}
static int __init drm_core_init(void)
{
int ret;
+ drm_global_init();
drm_connector_ida_init();
idr_init(&drm_minors_idr);
diff --git a/drivers/gpu/drm/drm_global.c b/drivers/gpu/drm/drm_global.c
new file mode 100644
index 000000000000..5799e2782dd1
--- /dev/null
+++ b/drivers/gpu/drm/drm_global.c
@@ -0,0 +1,137 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/**************************************************************************
+ *
+ * Copyright 2008-2009 VMware, Inc., Palo Alto, CA., USA
+ *
+ * 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 <thellstrom-at-vmware-dot-com>
+ */
+
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <drm/drm_global.h>
+
+struct drm_global_item {
+ struct mutex 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];
+ mutex_init(&item->mutex);
+ 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];
+ BUG_ON(item->object != NULL);
+ BUG_ON(item->refcount != 0);
+ }
+}
+
+/**
+ * drm_global_item_ref - Initialize and acquire reference to memory
+ * object
+ * @ref: Object for initialization
+ *
+ * This initializes a memory object, allocating memory and calling the
+ * .init() hook. Further calls will increase the reference count for
+ * that item.
+ *
+ * Returns:
+ * Zero on success, non-zero otherwise.
+ */
+int drm_global_item_ref(struct drm_global_reference *ref)
+{
+ int ret = 0;
+ struct drm_global_item *item = &glob[ref->global_type];
+
+ mutex_lock(&item->mutex);
+ if (item->refcount == 0) {
+ ref->object = kzalloc(ref->size, GFP_KERNEL);
+ if (unlikely(ref->object == NULL)) {
+ ret = -ENOMEM;
+ goto error_unlock;
+ }
+ ret = ref->init(ref);
+ if (unlikely(ret != 0))
+ goto error_free;
+
+ item->object = ref->object;
+ } else {
+ ref->object = item->object;
+ }
+
+ ++item->refcount;
+ mutex_unlock(&item->mutex);
+ return 0;
+
+error_free:
+ kfree(ref->object);
+ ref->object = NULL;
+error_unlock:
+ mutex_unlock(&item->mutex);
+ return ret;
+}
+EXPORT_SYMBOL(drm_global_item_ref);
+
+/**
+ * drm_global_item_unref - Drop reference to memory
+ * object
+ * @ref: Object being removed
+ *
+ * Drop a reference to the memory object and eventually call the
+ * release() hook. The allocated object should be dropped in the
+ * release() hook or before calling this function
+ *
+ */
+
+void drm_global_item_unref(struct drm_global_reference *ref)
+{
+ struct drm_global_item *item = &glob[ref->global_type];
+
+ mutex_lock(&item->mutex);
+ BUG_ON(item->refcount == 0);
+ BUG_ON(ref->object != item->object);
+ if (--item->refcount == 0) {
+ ref->release(ref);
+ item->object = NULL;
+ }
+ mutex_unlock(&item->mutex);
+}
+EXPORT_SYMBOL(drm_global_item_unref);
+
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index bdb0d5548f39..514beb2d483a 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -68,6 +68,7 @@
#include <drm/drm_agpsupport.h>
#include <drm/drm_crtc.h>
#include <drm/drm_fourcc.h>
+#include <drm/drm_global.h>
#include <drm/drm_hashtab.h>
#include <drm/drm_mm.h>
#include <drm/drm_os_linux.h>
diff --git a/include/drm/drm_global.h b/include/drm/drm_global.h
new file mode 100644
index 000000000000..3a830602a2e4
--- /dev/null
+++ b/include/drm/drm_global.h
@@ -0,0 +1,53 @@
+/**************************************************************************
+ *
+ * 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 <thellstrom-at-vmware-dot-com>
+ */
+
+#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 *);
+};
+
+void drm_global_init(void);
+void drm_global_release(void);
+int drm_global_item_ref(struct drm_global_reference *ref);
+void drm_global_item_unref(struct drm_global_reference *ref);
+
+#endif
diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h
index 1021106438b2..6fb589f64633 100644
--- a/include/drm/ttm/ttm_bo_driver.h
+++ b/include/drm/ttm/ttm_bo_driver.h
@@ -31,6 +31,7 @@
#define _TTM_BO_DRIVER_H_
#include <drm/drm_mm.h>
+#include <drm/drm_global.h>
#include <drm/drm_vma_manager.h>
#include <linux/workqueue.h>
#include <linux/fs.h>
--
2.20.1
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