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diff --git a/drivers/gpu/drm/amd/include/linux/chash.h b/drivers/gpu/drm/amd/include/linux/chash.h
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--- a/drivers/gpu/drm/amd/include/linux/chash.h
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-/*
- * Copyright 2017 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.
- *
- */
-
-#ifndef _LINUX_CHASH_H
-#define _LINUX_CHASH_H
-
-#include <linux/types.h>
-#include <linux/hash.h>
-#include <linux/bug.h>
-#include <asm/bitsperlong.h>
-
-#if BITS_PER_LONG == 32
-# define _CHASH_LONG_SHIFT 5
-#elif BITS_PER_LONG == 64
-# define _CHASH_LONG_SHIFT 6
-#else
-# error "Unexpected BITS_PER_LONG"
-#endif
-
-struct __chash_table {
- u8 bits;
- u8 key_size;
- unsigned int value_size;
- u32 size_mask;
- unsigned long *occup_bitmap, *valid_bitmap;
- union {
- u32 *keys32;
- u64 *keys64;
- };
- u8 *values;
-
-#ifdef CONFIG_CHASH_STATS
- u64 hits, hits_steps, hits_time_ns;
- u64 miss, miss_steps, miss_time_ns;
- u64 relocs, reloc_dist;
-#endif
-};
-
-#define __CHASH_BITMAP_SIZE(bits) \
- (((1 << (bits)) + BITS_PER_LONG - 1) / BITS_PER_LONG)
-#define __CHASH_ARRAY_SIZE(bits, size) \
- ((((size) << (bits)) + sizeof(long) - 1) / sizeof(long))
-
-#define __CHASH_DATA_SIZE(bits, key_size, value_size) \
- (__CHASH_BITMAP_SIZE(bits) * 2 + \
- __CHASH_ARRAY_SIZE(bits, key_size) + \
- __CHASH_ARRAY_SIZE(bits, value_size))
-
-#define STRUCT_CHASH_TABLE(bits, key_size, value_size) \
- struct { \
- struct __chash_table table; \
- unsigned long data \
- [__CHASH_DATA_SIZE(bits, key_size, value_size)];\
- }
-
-/**
- * struct chash_table - Dynamically allocated closed hash table
- *
- * Use this struct for dynamically allocated hash tables (using
- * chash_table_alloc and chash_table_free), where the size is
- * determined at runtime.
- */
-struct chash_table {
- struct __chash_table table;
- unsigned long *data;
-};
-
-/**
- * DECLARE_CHASH_TABLE - macro to declare a closed hash table
- * @table: name of the declared hash table
- * @bts: Table size will be 2^bits entries
- * @key_sz: Size of hash keys in bytes, 4 or 8
- * @val_sz: Size of data values in bytes, can be 0
- *
- * This declares the hash table variable with a static size.
- *
- * The closed hash table stores key-value pairs with low memory and
- * lookup overhead. In operation it performs no dynamic memory
- * management. The data being stored does not require any
- * list_heads. The hash table performs best with small @val_sz and as
- * long as some space (about 50%) is left free in the table. But the
- * table can still work reasonably efficiently even when filled up to
- * about 90%. If bigger data items need to be stored and looked up,
- * store the pointer to it as value in the hash table.
- *
- * @val_sz may be 0. This can be useful when all the stored
- * information is contained in the key itself and the fact that it is
- * in the hash table (or not).
- */
-#define DECLARE_CHASH_TABLE(table, bts, key_sz, val_sz) \
- STRUCT_CHASH_TABLE(bts, key_sz, val_sz) table
-
-#ifdef CONFIG_CHASH_STATS
-#define __CHASH_STATS_INIT(prefix), \
- prefix.hits = 0, \
- prefix.hits_steps = 0, \
- prefix.hits_time_ns = 0, \
- prefix.miss = 0, \
- prefix.miss_steps = 0, \
- prefix.miss_time_ns = 0, \
- prefix.relocs = 0, \
- prefix.reloc_dist = 0
-#else
-#define __CHASH_STATS_INIT(prefix)
-#endif
-
-#define __CHASH_TABLE_INIT(prefix, data, bts, key_sz, val_sz) \
- prefix.bits = (bts), \
- prefix.key_size = (key_sz), \
- prefix.value_size = (val_sz), \
- prefix.size_mask = ((1 << bts) - 1), \
- prefix.occup_bitmap = &data[0], \
- prefix.valid_bitmap = &data \
- [__CHASH_BITMAP_SIZE(bts)], \
- prefix.keys64 = (u64 *)&data \
- [__CHASH_BITMAP_SIZE(bts) * 2], \
- prefix.values = (u8 *)&data \
- [__CHASH_BITMAP_SIZE(bts) * 2 + \
- __CHASH_ARRAY_SIZE(bts, key_sz)] \
- __CHASH_STATS_INIT(prefix)
-
-/**
- * DEFINE_CHASH_TABLE - macro to define and initialize a closed hash table
- * @tbl: name of the declared hash table
- * @bts: Table size will be 2^bits entries
- * @key_sz: Size of hash keys in bytes, 4 or 8
- * @val_sz: Size of data values in bytes, can be 0
- *
- * Note: the macro can be used for global and local hash table variables.
- */
-#define DEFINE_CHASH_TABLE(tbl, bts, key_sz, val_sz) \
- DECLARE_CHASH_TABLE(tbl, bts, key_sz, val_sz) = { \
- .table = { \
- __CHASH_TABLE_INIT(, (tbl).data, bts, key_sz, val_sz) \
- }, \
- .data = {0} \
- }
-
-/**
- * INIT_CHASH_TABLE - Initialize a hash table declared by DECLARE_CHASH_TABLE
- * @tbl: name of the declared hash table
- * @bts: Table size will be 2^bits entries
- * @key_sz: Size of hash keys in bytes, 4 or 8
- * @val_sz: Size of data values in bytes, can be 0
- */
-#define INIT_CHASH_TABLE(tbl, bts, key_sz, val_sz) \
- __CHASH_TABLE_INIT(((tbl).table), (tbl).data, bts, key_sz, val_sz)
-
-int chash_table_alloc(struct chash_table *table, u8 bits, u8 key_size,
- unsigned int value_size, gfp_t gfp_mask);
-void chash_table_free(struct chash_table *table);
-
-/**
- * chash_table_dump_stats - Dump statistics of a closed hash table
- * @tbl: Pointer to the table structure
- *
- * Dumps some performance statistics of the table gathered in operation
- * in the kernel log using pr_debug. If CONFIG_DYNAMIC_DEBUG is enabled,
- * user must turn on messages for chash.c (file chash.c +p).
- */
-#ifdef CONFIG_CHASH_STATS
-#define chash_table_dump_stats(tbl) __chash_table_dump_stats(&(*tbl).table)
-
-void __chash_table_dump_stats(struct __chash_table *table);
-#else
-#define chash_table_dump_stats(tbl)
-#endif
-
-/**
- * chash_table_reset_stats - Reset statistics of a closed hash table
- * @tbl: Pointer to the table structure
- */
-#ifdef CONFIG_CHASH_STATS
-#define chash_table_reset_stats(tbl) __chash_table_reset_stats(&(*tbl).table)
-
-static inline void __chash_table_reset_stats(struct __chash_table *table)
-{
- (void)table __CHASH_STATS_INIT((*table));
-}
-#else
-#define chash_table_reset_stats(tbl)
-#endif
-
-/**
- * chash_table_copy_in - Copy a new value into the hash table
- * @tbl: Pointer to the table structure
- * @key: Key of the entry to add or update
- * @value: Pointer to value to copy, may be NULL
- *
- * If @key already has an entry, its value is replaced. Otherwise a
- * new entry is added. If @value is NULL, the value is left unchanged
- * or uninitialized. Returns 1 if an entry already existed, 0 if a new
- * entry was added or %-ENOMEM if there was no free space in the
- * table.
- */
-#define chash_table_copy_in(tbl, key, value) \
- __chash_table_copy_in(&(*tbl).table, key, value)
-
-int __chash_table_copy_in(struct __chash_table *table, u64 key,
- const void *value);
-
-/**
- * chash_table_copy_out - Copy a value out of the hash table
- * @tbl: Pointer to the table structure
- * @key: Key of the entry to find
- * @value: Pointer to value to copy, may be NULL
- *
- * If @value is not NULL and the table has a non-0 value_size, the
- * value at @key is copied to @value. Returns the slot index of the
- * entry or %-EINVAL if @key was not found.
- */
-#define chash_table_copy_out(tbl, key, value) \
- __chash_table_copy_out(&(*tbl).table, key, value, false)
-
-int __chash_table_copy_out(struct __chash_table *table, u64 key,
- void *value, bool remove);
-
-/**
- * chash_table_remove - Remove an entry from the hash table
- * @tbl: Pointer to the table structure
- * @key: Key of the entry to find
- * @value: Pointer to value to copy, may be NULL
- *
- * If @value is not NULL and the table has a non-0 value_size, the
- * value at @key is copied to @value. The entry is removed from the
- * table. Returns the slot index of the removed entry or %-EINVAL if
- * @key was not found.
- */
-#define chash_table_remove(tbl, key, value) \
- __chash_table_copy_out(&(*tbl).table, key, value, true)
-
-/*
- * Low level iterator API used internally by the above functions.
- */
-struct chash_iter {
- struct __chash_table *table;
- unsigned long mask;
- int slot;
-};
-
-/**
- * CHASH_ITER_INIT - Initialize a hash table iterator
- * @tbl: Pointer to hash table to iterate over
- * @s: Initial slot number
- */
-#define CHASH_ITER_INIT(table, s) { \
- table, \
- 1UL << ((s) & (BITS_PER_LONG - 1)), \
- s \
- }
-/**
- * CHASH_ITER_SET - Set hash table iterator to new slot
- * @iter: Iterator
- * @s: Slot number
- */
-#define CHASH_ITER_SET(iter, s) \
- (iter).mask = 1UL << ((s) & (BITS_PER_LONG - 1)), \
- (iter).slot = (s)
-/**
- * CHASH_ITER_INC - Increment hash table iterator
- * @table: Hash table to iterate over
- *
- * Wraps around at the end.
- */
-#define CHASH_ITER_INC(iter) do { \
- (iter).mask = (iter).mask << 1 | \
- (iter).mask >> (BITS_PER_LONG - 1); \
- (iter).slot = ((iter).slot + 1) & (iter).table->size_mask; \
- } while (0)
-
-static inline bool chash_iter_is_valid(const struct chash_iter iter)
-{
- BUG_ON((unsigned)iter.slot >= (1 << iter.table->bits));
- return !!(iter.table->valid_bitmap[iter.slot >> _CHASH_LONG_SHIFT] &
- iter.mask);
-}
-static inline bool chash_iter_is_empty(const struct chash_iter iter)
-{
- BUG_ON((unsigned)iter.slot >= (1 << iter.table->bits));
- return !(iter.table->occup_bitmap[iter.slot >> _CHASH_LONG_SHIFT] &
- iter.mask);
-}
-
-static inline void chash_iter_set_valid(const struct chash_iter iter)
-{
- BUG_ON((unsigned)iter.slot >= (1 << iter.table->bits));
- iter.table->valid_bitmap[iter.slot >> _CHASH_LONG_SHIFT] |= iter.mask;
- iter.table->occup_bitmap[iter.slot >> _CHASH_LONG_SHIFT] |= iter.mask;
-}
-static inline void chash_iter_set_invalid(const struct chash_iter iter)
-{
- BUG_ON((unsigned)iter.slot >= (1 << iter.table->bits));
- iter.table->valid_bitmap[iter.slot >> _CHASH_LONG_SHIFT] &= ~iter.mask;
-}
-static inline void chash_iter_set_empty(const struct chash_iter iter)
-{
- BUG_ON((unsigned)iter.slot >= (1 << iter.table->bits));
- iter.table->occup_bitmap[iter.slot >> _CHASH_LONG_SHIFT] &= ~iter.mask;
-}
-
-static inline u32 chash_iter_key32(const struct chash_iter iter)
-{
- BUG_ON(iter.table->key_size != 4);
- BUG_ON((unsigned)iter.slot >= (1 << iter.table->bits));
- return iter.table->keys32[iter.slot];
-}
-static inline u64 chash_iter_key64(const struct chash_iter iter)
-{
- BUG_ON(iter.table->key_size != 8);
- BUG_ON((unsigned)iter.slot >= (1 << iter.table->bits));
- return iter.table->keys64[iter.slot];
-}
-static inline u64 chash_iter_key(const struct chash_iter iter)
-{
- BUG_ON((unsigned)iter.slot >= (1 << iter.table->bits));
- return (iter.table->key_size == 4) ?
- iter.table->keys32[iter.slot] : iter.table->keys64[iter.slot];
-}
-
-static inline u32 chash_iter_hash32(const struct chash_iter iter)
-{
- BUG_ON(iter.table->key_size != 4);
- return hash_32(chash_iter_key32(iter), iter.table->bits);
-}
-
-static inline u32 chash_iter_hash64(const struct chash_iter iter)
-{
- BUG_ON(iter.table->key_size != 8);
- return hash_64(chash_iter_key64(iter), iter.table->bits);
-}
-
-static inline u32 chash_iter_hash(const struct chash_iter iter)
-{
- return (iter.table->key_size == 4) ?
- hash_32(chash_iter_key32(iter), iter.table->bits) :
- hash_64(chash_iter_key64(iter), iter.table->bits);
-}
-
-static inline void *chash_iter_value(const struct chash_iter iter)
-{
- BUG_ON((unsigned)iter.slot >= (1 << iter.table->bits));
- return iter.table->values +
- ((unsigned long)iter.slot * iter.table->value_size);
-}
-
-#endif /* _LINUX_CHASH_H */