1 files changed, 92 insertions, 0 deletions
diff --git a/include/drm/ttm/ttm_pool.h b/include/drm/ttm/ttm_pool.h
new file mode 100644
index 000000000000..ef09b23d29e3
--- /dev/null
+++ b/include/drm/ttm/ttm_pool.h
@@ -0,0 +1,92 @@
+/* SPDX-License-Identifier: GPL-2.0 OR MIT */
+/*
+ * Copyright 2020 Advanced Micro Devices, Inc.
+ *
+ * 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, sublicense,
+ * 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 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 NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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: Christian König
+ */
+
+#ifndef _TTM_PAGE_POOL_H_
+#define _TTM_PAGE_POOL_H_
+
+#include <linux/mmzone.h>
+#include <linux/llist.h>
+#include <linux/spinlock.h>
+#include <drm/ttm/ttm_caching.h>
+
+struct device;
+struct ttm_tt;
+struct ttm_pool;
+struct ttm_operation_ctx;
+
+/**
+ * struct ttm_pool_type - Pool for a certain memory type
+ *
+ * @pool: the pool we belong to, might be NULL for the global ones
+ * @order: the allocation order our pages have
+ * @caching: the caching type our pages have
+ * @shrinker_list: our place on the global shrinker list
+ * @lock: protection of the page list
+ * @pages: the list of pages in the pool
+ */
+struct ttm_pool_type {
+	struct ttm_pool *pool;
+	unsigned int order;
+	enum ttm_caching caching;
+
+	struct list_head shrinker_list;
+
+	spinlock_t lock;
+	struct list_head pages;
+};
+
+/**
+ * struct ttm_pool - Pool for all caching and orders
+ *
+ * @dev: the device we allocate pages for
+ * @use_dma_alloc: if coherent DMA allocations should be used
+ * @use_dma32: if GFP_DMA32 should be used
+ * @caching: pools for each caching/order
+ */
+struct ttm_pool {
+	struct device *dev;
+
+	bool use_dma_alloc;
+	bool use_dma32;
+
+	struct {
+		struct ttm_pool_type orders[MAX_ORDER];
+	} caching[TTM_NUM_CACHING_TYPES];
+};
+
+int ttm_pool_alloc(struct ttm_pool *pool, struct ttm_tt *tt,
+		   struct ttm_operation_ctx *ctx);
+void ttm_pool_free(struct ttm_pool *pool, struct ttm_tt *tt);
+
+void ttm_pool_init(struct ttm_pool *pool, struct device *dev,
+		   bool use_dma_alloc, bool use_dma32);
+void ttm_pool_fini(struct ttm_pool *pool);
+
+int ttm_pool_debugfs(struct ttm_pool *pool, struct seq_file *m);
+
+int ttm_pool_mgr_init(unsigned long num_pages);
+void ttm_pool_mgr_fini(void);
+
+#endif