428 lines
12 KiB
C
428 lines
12 KiB
C
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// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
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/* Copyright (c) 2018 Mellanox Technologies. All rights reserved */
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#include <linux/kernel.h>
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#include <linux/bitops.h>
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#include "spectrum.h"
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#define MLXSW_SP1_KVDL_SINGLE_BASE 0
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#define MLXSW_SP1_KVDL_SINGLE_SIZE 16384
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#define MLXSW_SP1_KVDL_SINGLE_END \
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(MLXSW_SP1_KVDL_SINGLE_SIZE + MLXSW_SP1_KVDL_SINGLE_BASE - 1)
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#define MLXSW_SP1_KVDL_CHUNKS_BASE \
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(MLXSW_SP1_KVDL_SINGLE_BASE + MLXSW_SP1_KVDL_SINGLE_SIZE)
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#define MLXSW_SP1_KVDL_CHUNKS_SIZE 49152
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#define MLXSW_SP1_KVDL_CHUNKS_END \
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(MLXSW_SP1_KVDL_CHUNKS_SIZE + MLXSW_SP1_KVDL_CHUNKS_BASE - 1)
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#define MLXSW_SP1_KVDL_LARGE_CHUNKS_BASE \
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(MLXSW_SP1_KVDL_CHUNKS_BASE + MLXSW_SP1_KVDL_CHUNKS_SIZE)
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#define MLXSW_SP1_KVDL_LARGE_CHUNKS_SIZE \
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(MLXSW_SP_KVD_LINEAR_SIZE - MLXSW_SP1_KVDL_LARGE_CHUNKS_BASE)
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#define MLXSW_SP1_KVDL_LARGE_CHUNKS_END \
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(MLXSW_SP1_KVDL_LARGE_CHUNKS_SIZE + MLXSW_SP1_KVDL_LARGE_CHUNKS_BASE - 1)
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#define MLXSW_SP1_KVDL_SINGLE_ALLOC_SIZE 1
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#define MLXSW_SP1_KVDL_CHUNKS_ALLOC_SIZE 32
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#define MLXSW_SP1_KVDL_LARGE_CHUNKS_ALLOC_SIZE 512
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struct mlxsw_sp1_kvdl_part_info {
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unsigned int part_index;
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unsigned int start_index;
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unsigned int end_index;
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unsigned int alloc_size;
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enum mlxsw_sp_resource_id resource_id;
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};
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enum mlxsw_sp1_kvdl_part_id {
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MLXSW_SP1_KVDL_PART_ID_SINGLE,
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MLXSW_SP1_KVDL_PART_ID_CHUNKS,
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MLXSW_SP1_KVDL_PART_ID_LARGE_CHUNKS,
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};
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#define MLXSW_SP1_KVDL_PART_INFO(id) \
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[MLXSW_SP1_KVDL_PART_ID_##id] = { \
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.start_index = MLXSW_SP1_KVDL_##id##_BASE, \
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.end_index = MLXSW_SP1_KVDL_##id##_END, \
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.alloc_size = MLXSW_SP1_KVDL_##id##_ALLOC_SIZE, \
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.resource_id = MLXSW_SP_RESOURCE_KVD_LINEAR_##id, \
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}
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static const struct mlxsw_sp1_kvdl_part_info mlxsw_sp1_kvdl_parts_info[] = {
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MLXSW_SP1_KVDL_PART_INFO(SINGLE),
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MLXSW_SP1_KVDL_PART_INFO(CHUNKS),
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MLXSW_SP1_KVDL_PART_INFO(LARGE_CHUNKS),
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};
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#define MLXSW_SP1_KVDL_PARTS_INFO_LEN ARRAY_SIZE(mlxsw_sp1_kvdl_parts_info)
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struct mlxsw_sp1_kvdl_part {
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struct mlxsw_sp1_kvdl_part_info info;
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unsigned long usage[]; /* Entries */
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};
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struct mlxsw_sp1_kvdl {
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struct mlxsw_sp1_kvdl_part *parts[MLXSW_SP1_KVDL_PARTS_INFO_LEN];
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};
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static struct mlxsw_sp1_kvdl_part *
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mlxsw_sp1_kvdl_alloc_size_part(struct mlxsw_sp1_kvdl *kvdl,
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unsigned int alloc_size)
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{
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struct mlxsw_sp1_kvdl_part *part, *min_part = NULL;
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int i;
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for (i = 0; i < MLXSW_SP1_KVDL_PARTS_INFO_LEN; i++) {
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part = kvdl->parts[i];
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if (alloc_size <= part->info.alloc_size &&
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(!min_part ||
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part->info.alloc_size <= min_part->info.alloc_size))
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min_part = part;
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}
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return min_part ?: ERR_PTR(-ENOBUFS);
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}
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static struct mlxsw_sp1_kvdl_part *
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mlxsw_sp1_kvdl_index_part(struct mlxsw_sp1_kvdl *kvdl, u32 kvdl_index)
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{
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struct mlxsw_sp1_kvdl_part *part;
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int i;
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for (i = 0; i < MLXSW_SP1_KVDL_PARTS_INFO_LEN; i++) {
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part = kvdl->parts[i];
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if (kvdl_index >= part->info.start_index &&
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kvdl_index <= part->info.end_index)
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return part;
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}
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return ERR_PTR(-EINVAL);
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}
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static u32
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mlxsw_sp1_kvdl_to_kvdl_index(const struct mlxsw_sp1_kvdl_part_info *info,
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unsigned int entry_index)
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{
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return info->start_index + entry_index * info->alloc_size;
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}
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static unsigned int
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mlxsw_sp1_kvdl_to_entry_index(const struct mlxsw_sp1_kvdl_part_info *info,
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u32 kvdl_index)
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{
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return (kvdl_index - info->start_index) / info->alloc_size;
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}
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static int mlxsw_sp1_kvdl_part_alloc(struct mlxsw_sp1_kvdl_part *part,
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u32 *p_kvdl_index)
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{
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const struct mlxsw_sp1_kvdl_part_info *info = &part->info;
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unsigned int entry_index, nr_entries;
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nr_entries = (info->end_index - info->start_index + 1) /
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info->alloc_size;
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entry_index = find_first_zero_bit(part->usage, nr_entries);
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if (entry_index == nr_entries)
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return -ENOBUFS;
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__set_bit(entry_index, part->usage);
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*p_kvdl_index = mlxsw_sp1_kvdl_to_kvdl_index(info, entry_index);
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return 0;
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}
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static void mlxsw_sp1_kvdl_part_free(struct mlxsw_sp1_kvdl_part *part,
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u32 kvdl_index)
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{
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const struct mlxsw_sp1_kvdl_part_info *info = &part->info;
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unsigned int entry_index;
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entry_index = mlxsw_sp1_kvdl_to_entry_index(info, kvdl_index);
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__clear_bit(entry_index, part->usage);
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}
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static int mlxsw_sp1_kvdl_alloc(struct mlxsw_sp *mlxsw_sp, void *priv,
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enum mlxsw_sp_kvdl_entry_type type,
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unsigned int entry_count,
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u32 *p_entry_index)
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{
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struct mlxsw_sp1_kvdl *kvdl = priv;
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struct mlxsw_sp1_kvdl_part *part;
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/* Find partition with smallest allocation size satisfying the
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* requested size.
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*/
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part = mlxsw_sp1_kvdl_alloc_size_part(kvdl, entry_count);
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if (IS_ERR(part))
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return PTR_ERR(part);
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return mlxsw_sp1_kvdl_part_alloc(part, p_entry_index);
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}
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static void mlxsw_sp1_kvdl_free(struct mlxsw_sp *mlxsw_sp, void *priv,
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enum mlxsw_sp_kvdl_entry_type type,
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unsigned int entry_count, int entry_index)
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{
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struct mlxsw_sp1_kvdl *kvdl = priv;
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struct mlxsw_sp1_kvdl_part *part;
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part = mlxsw_sp1_kvdl_index_part(kvdl, entry_index);
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if (IS_ERR(part))
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return;
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mlxsw_sp1_kvdl_part_free(part, entry_index);
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}
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static int mlxsw_sp1_kvdl_alloc_size_query(struct mlxsw_sp *mlxsw_sp,
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void *priv,
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enum mlxsw_sp_kvdl_entry_type type,
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unsigned int entry_count,
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unsigned int *p_alloc_size)
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{
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struct mlxsw_sp1_kvdl *kvdl = priv;
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struct mlxsw_sp1_kvdl_part *part;
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part = mlxsw_sp1_kvdl_alloc_size_part(kvdl, entry_count);
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if (IS_ERR(part))
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return PTR_ERR(part);
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*p_alloc_size = part->info.alloc_size;
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return 0;
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}
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static void mlxsw_sp1_kvdl_part_update(struct mlxsw_sp1_kvdl_part *part,
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struct mlxsw_sp1_kvdl_part *part_prev,
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unsigned int size)
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{
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if (!part_prev) {
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part->info.end_index = size - 1;
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} else {
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part->info.start_index = part_prev->info.end_index + 1;
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part->info.end_index = part->info.start_index + size - 1;
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}
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}
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static struct mlxsw_sp1_kvdl_part *
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mlxsw_sp1_kvdl_part_init(struct mlxsw_sp *mlxsw_sp,
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const struct mlxsw_sp1_kvdl_part_info *info,
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struct mlxsw_sp1_kvdl_part *part_prev)
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{
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struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
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struct mlxsw_sp1_kvdl_part *part;
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bool need_update = true;
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unsigned int nr_entries;
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u64 resource_size;
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int err;
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err = devlink_resource_size_get(devlink, info->resource_id,
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&resource_size);
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if (err) {
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need_update = false;
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resource_size = info->end_index - info->start_index + 1;
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}
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nr_entries = div_u64(resource_size, info->alloc_size);
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part = kzalloc(struct_size(part, usage, BITS_TO_LONGS(nr_entries)),
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GFP_KERNEL);
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if (!part)
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return ERR_PTR(-ENOMEM);
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memcpy(&part->info, info, sizeof(part->info));
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if (need_update)
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mlxsw_sp1_kvdl_part_update(part, part_prev, resource_size);
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return part;
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}
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static void mlxsw_sp1_kvdl_part_fini(struct mlxsw_sp1_kvdl_part *part)
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{
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kfree(part);
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}
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static int mlxsw_sp1_kvdl_parts_init(struct mlxsw_sp *mlxsw_sp,
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struct mlxsw_sp1_kvdl *kvdl)
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{
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const struct mlxsw_sp1_kvdl_part_info *info;
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struct mlxsw_sp1_kvdl_part *part_prev = NULL;
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int err, i;
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for (i = 0; i < MLXSW_SP1_KVDL_PARTS_INFO_LEN; i++) {
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info = &mlxsw_sp1_kvdl_parts_info[i];
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kvdl->parts[i] = mlxsw_sp1_kvdl_part_init(mlxsw_sp, info,
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part_prev);
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if (IS_ERR(kvdl->parts[i])) {
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err = PTR_ERR(kvdl->parts[i]);
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goto err_kvdl_part_init;
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}
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part_prev = kvdl->parts[i];
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}
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return 0;
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err_kvdl_part_init:
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for (i--; i >= 0; i--)
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mlxsw_sp1_kvdl_part_fini(kvdl->parts[i]);
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return err;
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}
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static void mlxsw_sp1_kvdl_parts_fini(struct mlxsw_sp1_kvdl *kvdl)
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{
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int i;
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for (i = 0; i < MLXSW_SP1_KVDL_PARTS_INFO_LEN; i++)
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mlxsw_sp1_kvdl_part_fini(kvdl->parts[i]);
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}
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static u64 mlxsw_sp1_kvdl_part_occ(struct mlxsw_sp1_kvdl_part *part)
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{
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const struct mlxsw_sp1_kvdl_part_info *info = &part->info;
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unsigned int nr_entries;
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int bit = -1;
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u64 occ = 0;
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nr_entries = (info->end_index -
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info->start_index + 1) /
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info->alloc_size;
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while ((bit = find_next_bit(part->usage, nr_entries, bit + 1))
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< nr_entries)
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occ += info->alloc_size;
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return occ;
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}
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static u64 mlxsw_sp1_kvdl_occ_get(void *priv)
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{
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const struct mlxsw_sp1_kvdl *kvdl = priv;
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u64 occ = 0;
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int i;
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for (i = 0; i < MLXSW_SP1_KVDL_PARTS_INFO_LEN; i++)
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occ += mlxsw_sp1_kvdl_part_occ(kvdl->parts[i]);
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return occ;
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}
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static u64 mlxsw_sp1_kvdl_single_occ_get(void *priv)
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{
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const struct mlxsw_sp1_kvdl *kvdl = priv;
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struct mlxsw_sp1_kvdl_part *part;
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part = kvdl->parts[MLXSW_SP1_KVDL_PART_ID_SINGLE];
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return mlxsw_sp1_kvdl_part_occ(part);
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}
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static u64 mlxsw_sp1_kvdl_chunks_occ_get(void *priv)
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{
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const struct mlxsw_sp1_kvdl *kvdl = priv;
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struct mlxsw_sp1_kvdl_part *part;
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part = kvdl->parts[MLXSW_SP1_KVDL_PART_ID_CHUNKS];
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return mlxsw_sp1_kvdl_part_occ(part);
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}
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static u64 mlxsw_sp1_kvdl_large_chunks_occ_get(void *priv)
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{
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const struct mlxsw_sp1_kvdl *kvdl = priv;
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struct mlxsw_sp1_kvdl_part *part;
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part = kvdl->parts[MLXSW_SP1_KVDL_PART_ID_LARGE_CHUNKS];
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return mlxsw_sp1_kvdl_part_occ(part);
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}
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static int mlxsw_sp1_kvdl_init(struct mlxsw_sp *mlxsw_sp, void *priv)
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{
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struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
|
||
|
|
struct mlxsw_sp1_kvdl *kvdl = priv;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
err = mlxsw_sp1_kvdl_parts_init(mlxsw_sp, kvdl);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
devlink_resource_occ_get_register(devlink,
|
||
|
|
MLXSW_SP_RESOURCE_KVD_LINEAR,
|
||
|
|
mlxsw_sp1_kvdl_occ_get,
|
||
|
|
kvdl);
|
||
|
|
devlink_resource_occ_get_register(devlink,
|
||
|
|
MLXSW_SP_RESOURCE_KVD_LINEAR_SINGLE,
|
||
|
|
mlxsw_sp1_kvdl_single_occ_get,
|
||
|
|
kvdl);
|
||
|
|
devlink_resource_occ_get_register(devlink,
|
||
|
|
MLXSW_SP_RESOURCE_KVD_LINEAR_CHUNKS,
|
||
|
|
mlxsw_sp1_kvdl_chunks_occ_get,
|
||
|
|
kvdl);
|
||
|
|
devlink_resource_occ_get_register(devlink,
|
||
|
|
MLXSW_SP_RESOURCE_KVD_LINEAR_LARGE_CHUNKS,
|
||
|
|
mlxsw_sp1_kvdl_large_chunks_occ_get,
|
||
|
|
kvdl);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void mlxsw_sp1_kvdl_fini(struct mlxsw_sp *mlxsw_sp, void *priv)
|
||
|
|
{
|
||
|
|
struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
|
||
|
|
struct mlxsw_sp1_kvdl *kvdl = priv;
|
||
|
|
|
||
|
|
devlink_resource_occ_get_unregister(devlink,
|
||
|
|
MLXSW_SP_RESOURCE_KVD_LINEAR_LARGE_CHUNKS);
|
||
|
|
devlink_resource_occ_get_unregister(devlink,
|
||
|
|
MLXSW_SP_RESOURCE_KVD_LINEAR_CHUNKS);
|
||
|
|
devlink_resource_occ_get_unregister(devlink,
|
||
|
|
MLXSW_SP_RESOURCE_KVD_LINEAR_SINGLE);
|
||
|
|
devlink_resource_occ_get_unregister(devlink,
|
||
|
|
MLXSW_SP_RESOURCE_KVD_LINEAR);
|
||
|
|
mlxsw_sp1_kvdl_parts_fini(kvdl);
|
||
|
|
}
|
||
|
|
|
||
|
|
const struct mlxsw_sp_kvdl_ops mlxsw_sp1_kvdl_ops = {
|
||
|
|
.priv_size = sizeof(struct mlxsw_sp1_kvdl),
|
||
|
|
.init = mlxsw_sp1_kvdl_init,
|
||
|
|
.fini = mlxsw_sp1_kvdl_fini,
|
||
|
|
.alloc = mlxsw_sp1_kvdl_alloc,
|
||
|
|
.free = mlxsw_sp1_kvdl_free,
|
||
|
|
.alloc_size_query = mlxsw_sp1_kvdl_alloc_size_query,
|
||
|
|
};
|
||
|
|
|
||
|
|
int mlxsw_sp1_kvdl_resources_register(struct mlxsw_core *mlxsw_core)
|
||
|
|
{
|
||
|
|
struct devlink *devlink = priv_to_devlink(mlxsw_core);
|
||
|
|
static struct devlink_resource_size_params size_params;
|
||
|
|
u32 kvdl_max_size;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
kvdl_max_size = MLXSW_CORE_RES_GET(mlxsw_core, KVD_SIZE) -
|
||
|
|
MLXSW_CORE_RES_GET(mlxsw_core, KVD_SINGLE_MIN_SIZE) -
|
||
|
|
MLXSW_CORE_RES_GET(mlxsw_core, KVD_DOUBLE_MIN_SIZE);
|
||
|
|
|
||
|
|
devlink_resource_size_params_init(&size_params, 0, kvdl_max_size,
|
||
|
|
MLXSW_SP1_KVDL_SINGLE_ALLOC_SIZE,
|
||
|
|
DEVLINK_RESOURCE_UNIT_ENTRY);
|
||
|
|
err = devlink_resource_register(devlink, MLXSW_SP_RESOURCE_NAME_KVD_LINEAR_SINGLES,
|
||
|
|
MLXSW_SP1_KVDL_SINGLE_SIZE,
|
||
|
|
MLXSW_SP_RESOURCE_KVD_LINEAR_SINGLE,
|
||
|
|
MLXSW_SP_RESOURCE_KVD_LINEAR,
|
||
|
|
&size_params);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
devlink_resource_size_params_init(&size_params, 0, kvdl_max_size,
|
||
|
|
MLXSW_SP1_KVDL_CHUNKS_ALLOC_SIZE,
|
||
|
|
DEVLINK_RESOURCE_UNIT_ENTRY);
|
||
|
|
err = devlink_resource_register(devlink, MLXSW_SP_RESOURCE_NAME_KVD_LINEAR_CHUNKS,
|
||
|
|
MLXSW_SP1_KVDL_CHUNKS_SIZE,
|
||
|
|
MLXSW_SP_RESOURCE_KVD_LINEAR_CHUNKS,
|
||
|
|
MLXSW_SP_RESOURCE_KVD_LINEAR,
|
||
|
|
&size_params);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
devlink_resource_size_params_init(&size_params, 0, kvdl_max_size,
|
||
|
|
MLXSW_SP1_KVDL_LARGE_CHUNKS_ALLOC_SIZE,
|
||
|
|
DEVLINK_RESOURCE_UNIT_ENTRY);
|
||
|
|
err = devlink_resource_register(devlink, MLXSW_SP_RESOURCE_NAME_KVD_LINEAR_LARGE_CHUNKS,
|
||
|
|
MLXSW_SP1_KVDL_LARGE_CHUNKS_SIZE,
|
||
|
|
MLXSW_SP_RESOURCE_KVD_LINEAR_LARGE_CHUNKS,
|
||
|
|
MLXSW_SP_RESOURCE_KVD_LINEAR,
|
||
|
|
&size_params);
|
||
|
|
return err;
|
||
|
|
}
|