1 files changed, 101 insertions, 0 deletions
diff --git a/drivers/gpu/mali400/r3p2/mali/common/mali_kernel_descriptor_mapping.h b/drivers/gpu/mali400/r3p2/mali/common/mali_kernel_descriptor_mapping.h
new file mode 100644
index 0000000..82ed94d
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+++ b/drivers/gpu/mali400/r3p2/mali/common/mali_kernel_descriptor_mapping.h
@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 2010, 2012 ARM Limited. All rights reserved.
+ * 
+ * This program is free software and is provided to you under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence.
+ * 
+ * A copy of the licence is included with the program, and can also be obtained from Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+/**
+ * @file mali_kernel_descriptor_mapping.h
+ */
+
+#ifndef __MALI_KERNEL_DESCRIPTOR_MAPPING_H__
+#define __MALI_KERNEL_DESCRIPTOR_MAPPING_H__
+
+#include "mali_osk.h"
+
+/**
+ * The actual descriptor mapping table, never directly accessed by clients
+ */
+typedef struct mali_descriptor_table
+{
+	u32 * usage; /**< Pointer to bitpattern indicating if a descriptor is valid/used or not */
+	void** mappings; /**< Array of the pointers the descriptors map to */
+} mali_descriptor_table;
+
+/**
+ * The descriptor mapping object
+ * Provides a separate namespace where we can map an integer to a pointer
+ */
+typedef struct mali_descriptor_mapping
+{
+    _mali_osk_lock_t *lock; /**< Lock protecting access to the mapping object */
+	int max_nr_mappings_allowed; /**< Max number of mappings to support in this namespace */
+	int current_nr_mappings; /**< Current number of possible mappings */
+	mali_descriptor_table * table; /**< Pointer to the current mapping table */
+} mali_descriptor_mapping;
+
+/**
+ * Create a descriptor mapping object
+ * Create a descriptor mapping capable of holding init_entries growable to max_entries
+ * @param init_entries Number of entries to preallocate memory for
+ * @param max_entries Number of entries to max support
+ * @return Pointer to a descriptor mapping object, NULL on failure
+ */
+mali_descriptor_mapping * mali_descriptor_mapping_create(int init_entries, int max_entries);
+
+/**
+ * Destroy a descriptor mapping object
+ * @param map The map to free
+ */
+void mali_descriptor_mapping_destroy(mali_descriptor_mapping * map);
+
+/**
+ * Allocate a new mapping entry (descriptor ID)
+ * Allocates a new entry in the map.
+ * @param map The map to allocate a new entry in
+ * @param target The value to map to
+ * @return The descriptor allocated, a negative value on error
+ */
+_mali_osk_errcode_t mali_descriptor_mapping_allocate_mapping(mali_descriptor_mapping * map, void * target, int *descriptor);
+
+/**
+ * Get the value mapped to by a descriptor ID
+ * @param map The map to lookup the descriptor id in
+ * @param descriptor The descriptor ID to lookup
+ * @param target Pointer to a pointer which will receive the stored value
+ * @return 0 on successful lookup, negative on error
+ */
+_mali_osk_errcode_t mali_descriptor_mapping_get(mali_descriptor_mapping * map, int descriptor, void** target);
+
+/**
+ * Set the value mapped to by a descriptor ID
+ * @param map The map to lookup the descriptor id in
+ * @param descriptor The descriptor ID to lookup
+ * @param target Pointer to replace the current value with
+ * @return 0 on successful lookup, negative on error
+ */
+_mali_osk_errcode_t mali_descriptor_mapping_set(mali_descriptor_mapping * map, int descriptor, void * target);
+
+/**
+ * Call the specified callback function for each descriptor in map.
+ * Entire function is mutex protected.
+ * @param map The map to do callbacks for
+ * @param callback A callback function which will be calle for each entry in map
+ */
+void mali_descriptor_mapping_call_for_each(mali_descriptor_mapping * map, void (*callback)(int, void*));
+
+/**
+ * Free the descriptor ID
+ * For the descriptor to be reused it has to be freed
+ * @param map The map to free the descriptor from
+ * @param descriptor The descriptor ID to free
+ *
+ * @return old value of descriptor mapping
+ */
+void *mali_descriptor_mapping_free(mali_descriptor_mapping * map, int descriptor);
+
+#endif /* __MALI_KERNEL_DESCRIPTOR_MAPPING_H__ */