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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/include/drm/ttm/ttm_memory.h
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/include/drm/ttm/ttm_memory.h')
-rw-r--r--kernel/include/drm/ttm/ttm_memory.h158
1 files changed, 158 insertions, 0 deletions
diff --git a/kernel/include/drm/ttm/ttm_memory.h b/kernel/include/drm/ttm/ttm_memory.h
new file mode 100644
index 000000000..72dcbe81d
--- /dev/null
+++ b/kernel/include/drm/ttm/ttm_memory.h
@@ -0,0 +1,158 @@
+/**************************************************************************
+ *
+ * Copyright (c) 2006-2009 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.
+ *
+ **************************************************************************/
+
+#ifndef TTM_MEMORY_H
+#define TTM_MEMORY_H
+
+#include <linux/workqueue.h>
+#include <linux/spinlock.h>
+#include <linux/bug.h>
+#include <linux/wait.h>
+#include <linux/errno.h>
+#include <linux/kobject.h>
+#include <linux/mm.h>
+
+/**
+ * struct ttm_mem_shrink - callback to shrink TTM memory usage.
+ *
+ * @do_shrink: The callback function.
+ *
+ * Arguments to the do_shrink functions are intended to be passed using
+ * inheritance. That is, the argument class derives from struct ttm_mem_shrink,
+ * and can be accessed using container_of().
+ */
+
+struct ttm_mem_shrink {
+ int (*do_shrink) (struct ttm_mem_shrink *);
+};
+
+/**
+ * struct ttm_mem_global - Global memory accounting structure.
+ *
+ * @shrink: A single callback to shrink TTM memory usage. Extend this
+ * to a linked list to be able to handle multiple callbacks when needed.
+ * @swap_queue: A workqueue to handle shrinking in low memory situations. We
+ * need a separate workqueue since it will spend a lot of time waiting
+ * for the GPU, and this will otherwise block other workqueue tasks(?)
+ * At this point we use only a single-threaded workqueue.
+ * @work: The workqueue callback for the shrink queue.
+ * @lock: Lock to protect the @shrink - and the memory accounting members,
+ * that is, essentially the whole structure with some exceptions.
+ * @zones: Array of pointers to accounting zones.
+ * @num_zones: Number of populated entries in the @zones array.
+ * @zone_kernel: Pointer to the kernel zone.
+ * @zone_highmem: Pointer to the highmem zone if there is one.
+ * @zone_dma32: Pointer to the dma32 zone if there is one.
+ *
+ * Note that this structure is not per device. It should be global for all
+ * graphics devices.
+ */
+
+#define TTM_MEM_MAX_ZONES 2
+struct ttm_mem_zone;
+struct ttm_mem_global {
+ struct kobject kobj;
+ struct ttm_mem_shrink *shrink;
+ struct workqueue_struct *swap_queue;
+ struct work_struct work;
+ spinlock_t lock;
+ struct ttm_mem_zone *zones[TTM_MEM_MAX_ZONES];
+ unsigned int num_zones;
+ struct ttm_mem_zone *zone_kernel;
+#ifdef CONFIG_HIGHMEM
+ struct ttm_mem_zone *zone_highmem;
+#else
+ struct ttm_mem_zone *zone_dma32;
+#endif
+};
+
+/**
+ * ttm_mem_init_shrink - initialize a struct ttm_mem_shrink object
+ *
+ * @shrink: The object to initialize.
+ * @func: The callback function.
+ */
+
+static inline void ttm_mem_init_shrink(struct ttm_mem_shrink *shrink,
+ int (*func) (struct ttm_mem_shrink *))
+{
+ shrink->do_shrink = func;
+}
+
+/**
+ * ttm_mem_register_shrink - register a struct ttm_mem_shrink object.
+ *
+ * @glob: The struct ttm_mem_global object to register with.
+ * @shrink: An initialized struct ttm_mem_shrink object to register.
+ *
+ * Returns:
+ * -EBUSY: There's already a callback registered. (May change).
+ */
+
+static inline int ttm_mem_register_shrink(struct ttm_mem_global *glob,
+ struct ttm_mem_shrink *shrink)
+{
+ spin_lock(&glob->lock);
+ if (glob->shrink != NULL) {
+ spin_unlock(&glob->lock);
+ return -EBUSY;
+ }
+ glob->shrink = shrink;
+ spin_unlock(&glob->lock);
+ return 0;
+}
+
+/**
+ * ttm_mem_unregister_shrink - unregister a struct ttm_mem_shrink object.
+ *
+ * @glob: The struct ttm_mem_global object to unregister from.
+ * @shrink: A previously registert struct ttm_mem_shrink object.
+ *
+ */
+
+static inline void ttm_mem_unregister_shrink(struct ttm_mem_global *glob,
+ struct ttm_mem_shrink *shrink)
+{
+ spin_lock(&glob->lock);
+ BUG_ON(glob->shrink != shrink);
+ glob->shrink = NULL;
+ spin_unlock(&glob->lock);
+}
+
+extern int ttm_mem_global_init(struct ttm_mem_global *glob);
+extern void ttm_mem_global_release(struct ttm_mem_global *glob);
+extern int ttm_mem_global_alloc(struct ttm_mem_global *glob, uint64_t memory,
+ bool no_wait, bool interruptible);
+extern void ttm_mem_global_free(struct ttm_mem_global *glob,
+ uint64_t amount);
+extern int ttm_mem_global_alloc_page(struct ttm_mem_global *glob,
+ struct page *page,
+ bool no_wait, bool interruptible);
+extern void ttm_mem_global_free_page(struct ttm_mem_global *glob,
+ struct page *page);
+extern size_t ttm_round_pot(size_t size);
+#endif