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path: root/drivers/net/ethernet/mellanox/mlxsw/spectrum_kvdl.c
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Diffstat (limited to 'drivers/net/ethernet/mellanox/mlxsw/spectrum_kvdl.c')
-rw-r--r--drivers/net/ethernet/mellanox/mlxsw/spectrum_kvdl.c463
1 files changed, 42 insertions, 421 deletions
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_kvdl.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_kvdl.c
index fe4327f547d2..1e4cdee7bcd7 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_kvdl.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_kvdl.c
@@ -1,454 +1,75 @@
-/*
- * drivers/net/ethernet/mellanox/mlxsw/spectrum_kvdl.c
- * Copyright (c) 2016 Mellanox Technologies. All rights reserved.
- * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the names of the copyright holders nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * Alternatively, this software may be distributed under the terms of the
- * GNU General Public License ("GPL") version 2 as published by the Free
- * Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/* Copyright (c) 2016-2018 Mellanox Technologies. All rights reserved */
#include <linux/kernel.h>
-#include <linux/bitops.h>
+#include <linux/slab.h>
#include "spectrum.h"
-#define MLXSW_SP_KVDL_SINGLE_BASE 0
-#define MLXSW_SP_KVDL_SINGLE_SIZE 16384
-#define MLXSW_SP_KVDL_SINGLE_END \
- (MLXSW_SP_KVDL_SINGLE_SIZE + MLXSW_SP_KVDL_SINGLE_BASE - 1)
-
-#define MLXSW_SP_KVDL_CHUNKS_BASE \
- (MLXSW_SP_KVDL_SINGLE_BASE + MLXSW_SP_KVDL_SINGLE_SIZE)
-#define MLXSW_SP_KVDL_CHUNKS_SIZE 49152
-#define MLXSW_SP_KVDL_CHUNKS_END \
- (MLXSW_SP_KVDL_CHUNKS_SIZE + MLXSW_SP_KVDL_CHUNKS_BASE - 1)
-
-#define MLXSW_SP_KVDL_LARGE_CHUNKS_BASE \
- (MLXSW_SP_KVDL_CHUNKS_BASE + MLXSW_SP_KVDL_CHUNKS_SIZE)
-#define MLXSW_SP_KVDL_LARGE_CHUNKS_SIZE \
- (MLXSW_SP_KVD_LINEAR_SIZE - MLXSW_SP_KVDL_LARGE_CHUNKS_BASE)
-#define MLXSW_SP_KVDL_LARGE_CHUNKS_END \
- (MLXSW_SP_KVDL_LARGE_CHUNKS_SIZE + MLXSW_SP_KVDL_LARGE_CHUNKS_BASE - 1)
-
-#define MLXSW_SP_KVDL_SINGLE_ALLOC_SIZE 1
-#define MLXSW_SP_KVDL_CHUNKS_ALLOC_SIZE 32
-#define MLXSW_SP_KVDL_LARGE_CHUNKS_ALLOC_SIZE 512
-
-struct mlxsw_sp_kvdl_part_info {
- unsigned int part_index;
- unsigned int start_index;
- unsigned int end_index;
- unsigned int alloc_size;
- enum mlxsw_sp_resource_id resource_id;
-};
-
-enum mlxsw_sp_kvdl_part_id {
- MLXSW_SP_KVDL_PART_ID_SINGLE,
- MLXSW_SP_KVDL_PART_ID_CHUNKS,
- MLXSW_SP_KVDL_PART_ID_LARGE_CHUNKS,
-};
-
-#define MLXSW_SP_KVDL_PART_INFO(id) \
-[MLXSW_SP_KVDL_PART_ID_##id] = { \
- .start_index = MLXSW_SP_KVDL_##id##_BASE, \
- .end_index = MLXSW_SP_KVDL_##id##_END, \
- .alloc_size = MLXSW_SP_KVDL_##id##_ALLOC_SIZE, \
- .resource_id = MLXSW_SP_RESOURCE_KVD_LINEAR_##id, \
-}
-
-static const struct mlxsw_sp_kvdl_part_info mlxsw_sp_kvdl_parts_info[] = {
- MLXSW_SP_KVDL_PART_INFO(SINGLE),
- MLXSW_SP_KVDL_PART_INFO(CHUNKS),
- MLXSW_SP_KVDL_PART_INFO(LARGE_CHUNKS),
-};
-
-#define MLXSW_SP_KVDL_PARTS_INFO_LEN ARRAY_SIZE(mlxsw_sp_kvdl_parts_info)
-
-struct mlxsw_sp_kvdl_part {
- struct mlxsw_sp_kvdl_part_info info;
- unsigned long usage[0]; /* Entries */
-};
-
struct mlxsw_sp_kvdl {
- struct mlxsw_sp_kvdl_part *parts[MLXSW_SP_KVDL_PARTS_INFO_LEN];
+ const struct mlxsw_sp_kvdl_ops *kvdl_ops;
+ unsigned long priv[0];
+ /* priv has to be always the last item */
};
-static struct mlxsw_sp_kvdl_part *
-mlxsw_sp_kvdl_alloc_size_part(struct mlxsw_sp_kvdl *kvdl,
- unsigned int alloc_size)
-{
- struct mlxsw_sp_kvdl_part *part, *min_part = NULL;
- int i;
-
- for (i = 0; i < MLXSW_SP_KVDL_PARTS_INFO_LEN; i++) {
- part = kvdl->parts[i];
- if (alloc_size <= part->info.alloc_size &&
- (!min_part ||
- part->info.alloc_size <= min_part->info.alloc_size))
- min_part = part;
- }
-
- return min_part ?: ERR_PTR(-ENOBUFS);
-}
-
-static struct mlxsw_sp_kvdl_part *
-mlxsw_sp_kvdl_index_part(struct mlxsw_sp_kvdl *kvdl, u32 kvdl_index)
-{
- struct mlxsw_sp_kvdl_part *part;
- int i;
-
- for (i = 0; i < MLXSW_SP_KVDL_PARTS_INFO_LEN; i++) {
- part = kvdl->parts[i];
- if (kvdl_index >= part->info.start_index &&
- kvdl_index <= part->info.end_index)
- return part;
- }
-
- return ERR_PTR(-EINVAL);
-}
-
-static u32
-mlxsw_sp_entry_index_kvdl_index(const struct mlxsw_sp_kvdl_part_info *info,
- unsigned int entry_index)
-{
- return info->start_index + entry_index * info->alloc_size;
-}
-
-static unsigned int
-mlxsw_sp_kvdl_index_entry_index(const struct mlxsw_sp_kvdl_part_info *info,
- u32 kvdl_index)
-{
- return (kvdl_index - info->start_index) / info->alloc_size;
-}
-
-static int mlxsw_sp_kvdl_part_alloc(struct mlxsw_sp_kvdl_part *part,
- u32 *p_kvdl_index)
-{
- const struct mlxsw_sp_kvdl_part_info *info = &part->info;
- unsigned int entry_index, nr_entries;
-
- nr_entries = (info->end_index - info->start_index + 1) /
- info->alloc_size;
- entry_index = find_first_zero_bit(part->usage, nr_entries);
- if (entry_index == nr_entries)
- return -ENOBUFS;
- __set_bit(entry_index, part->usage);
-
- *p_kvdl_index = mlxsw_sp_entry_index_kvdl_index(info, entry_index);
-
- return 0;
-}
-
-static void mlxsw_sp_kvdl_part_free(struct mlxsw_sp_kvdl_part *part,
- u32 kvdl_index)
-{
- const struct mlxsw_sp_kvdl_part_info *info = &part->info;
- unsigned int entry_index;
-
- entry_index = mlxsw_sp_kvdl_index_entry_index(info, kvdl_index);
- __clear_bit(entry_index, part->usage);
-}
-
-int mlxsw_sp_kvdl_alloc(struct mlxsw_sp *mlxsw_sp, unsigned int entry_count,
- u32 *p_entry_index)
-{
- struct mlxsw_sp_kvdl_part *part;
-
- /* Find partition with smallest allocation size satisfying the
- * requested size.
- */
- part = mlxsw_sp_kvdl_alloc_size_part(mlxsw_sp->kvdl, entry_count);
- if (IS_ERR(part))
- return PTR_ERR(part);
-
- return mlxsw_sp_kvdl_part_alloc(part, p_entry_index);
-}
-
-void mlxsw_sp_kvdl_free(struct mlxsw_sp *mlxsw_sp, int entry_index)
-{
- struct mlxsw_sp_kvdl_part *part;
-
- part = mlxsw_sp_kvdl_index_part(mlxsw_sp->kvdl, entry_index);
- if (IS_ERR(part))
- return;
- mlxsw_sp_kvdl_part_free(part, entry_index);
-}
-
-int mlxsw_sp_kvdl_alloc_size_query(struct mlxsw_sp *mlxsw_sp,
- unsigned int entry_count,
- unsigned int *p_alloc_size)
-{
- struct mlxsw_sp_kvdl_part *part;
-
- part = mlxsw_sp_kvdl_alloc_size_part(mlxsw_sp->kvdl, entry_count);
- if (IS_ERR(part))
- return PTR_ERR(part);
-
- *p_alloc_size = part->info.alloc_size;
-
- return 0;
-}
-
-static void mlxsw_sp_kvdl_part_update(struct mlxsw_sp_kvdl_part *part,
- struct mlxsw_sp_kvdl_part *part_prev,
- unsigned int size)
-{
-
- if (!part_prev) {
- part->info.end_index = size - 1;
- } else {
- part->info.start_index = part_prev->info.end_index + 1;
- part->info.end_index = part->info.start_index + size - 1;
- }
-}
-
-static struct mlxsw_sp_kvdl_part *
-mlxsw_sp_kvdl_part_init(struct mlxsw_sp *mlxsw_sp,
- const struct mlxsw_sp_kvdl_part_info *info,
- struct mlxsw_sp_kvdl_part *part_prev)
+int mlxsw_sp_kvdl_init(struct mlxsw_sp *mlxsw_sp)
{
- struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
- struct mlxsw_sp_kvdl_part *part;
- bool need_update = true;
- unsigned int nr_entries;
- size_t usage_size;
- u64 resource_size;
+ const struct mlxsw_sp_kvdl_ops *kvdl_ops = mlxsw_sp->kvdl_ops;
+ struct mlxsw_sp_kvdl *kvdl;
int err;
- err = devlink_resource_size_get(devlink, info->resource_id,
- &resource_size);
- if (err) {
- need_update = false;
- resource_size = info->end_index - info->start_index + 1;
- }
-
- nr_entries = div_u64(resource_size, info->alloc_size);
- usage_size = BITS_TO_LONGS(nr_entries) * sizeof(unsigned long);
- part = kzalloc(sizeof(*part) + usage_size, GFP_KERNEL);
- if (!part)
- return ERR_PTR(-ENOMEM);
-
- memcpy(&part->info, info, sizeof(part->info));
-
- if (need_update)
- mlxsw_sp_kvdl_part_update(part, part_prev, resource_size);
- return part;
-}
-
-static void mlxsw_sp_kvdl_part_fini(struct mlxsw_sp_kvdl_part *part)
-{
- kfree(part);
-}
-
-static int mlxsw_sp_kvdl_parts_init(struct mlxsw_sp *mlxsw_sp)
-{
- struct mlxsw_sp_kvdl *kvdl = mlxsw_sp->kvdl;
- const struct mlxsw_sp_kvdl_part_info *info;
- struct mlxsw_sp_kvdl_part *part_prev = NULL;
- int err, i;
+ kvdl = kzalloc(sizeof(*mlxsw_sp->kvdl) + kvdl_ops->priv_size,
+ GFP_KERNEL);
+ if (!kvdl)
+ return -ENOMEM;
+ kvdl->kvdl_ops = kvdl_ops;
+ mlxsw_sp->kvdl = kvdl;
- for (i = 0; i < MLXSW_SP_KVDL_PARTS_INFO_LEN; i++) {
- info = &mlxsw_sp_kvdl_parts_info[i];
- kvdl->parts[i] = mlxsw_sp_kvdl_part_init(mlxsw_sp, info,
- part_prev);
- if (IS_ERR(kvdl->parts[i])) {
- err = PTR_ERR(kvdl->parts[i]);
- goto err_kvdl_part_init;
- }
- part_prev = kvdl->parts[i];
- }
+ err = kvdl_ops->init(mlxsw_sp, kvdl->priv);
+ if (err)
+ goto err_init;
return 0;
-err_kvdl_part_init:
- for (i--; i >= 0; i--)
- mlxsw_sp_kvdl_part_fini(kvdl->parts[i]);
+err_init:
+ kfree(kvdl);
return err;
}
-static void mlxsw_sp_kvdl_parts_fini(struct mlxsw_sp *mlxsw_sp)
+void mlxsw_sp_kvdl_fini(struct mlxsw_sp *mlxsw_sp)
{
struct mlxsw_sp_kvdl *kvdl = mlxsw_sp->kvdl;
- int i;
-
- for (i = 0; i < MLXSW_SP_KVDL_PARTS_INFO_LEN; i++)
- mlxsw_sp_kvdl_part_fini(kvdl->parts[i]);
-}
-
-static u64 mlxsw_sp_kvdl_part_occ(struct mlxsw_sp_kvdl_part *part)
-{
- const struct mlxsw_sp_kvdl_part_info *info = &part->info;
- unsigned int nr_entries;
- int bit = -1;
- u64 occ = 0;
-
- nr_entries = (info->end_index -
- info->start_index + 1) /
- info->alloc_size;
- while ((bit = find_next_bit(part->usage, nr_entries, bit + 1))
- < nr_entries)
- occ += info->alloc_size;
- return occ;
-}
-
-static u64 mlxsw_sp_kvdl_occ_get(void *priv)
-{
- const struct mlxsw_sp *mlxsw_sp = priv;
- u64 occ = 0;
- int i;
-
- for (i = 0; i < MLXSW_SP_KVDL_PARTS_INFO_LEN; i++)
- occ += mlxsw_sp_kvdl_part_occ(mlxsw_sp->kvdl->parts[i]);
-
- return occ;
-}
-
-static u64 mlxsw_sp_kvdl_single_occ_get(void *priv)
-{
- const struct mlxsw_sp *mlxsw_sp = priv;
- struct mlxsw_sp_kvdl_part *part;
-
- part = mlxsw_sp->kvdl->parts[MLXSW_SP_KVDL_PART_ID_SINGLE];
- return mlxsw_sp_kvdl_part_occ(part);
-}
-
-static u64 mlxsw_sp_kvdl_chunks_occ_get(void *priv)
-{
- const struct mlxsw_sp *mlxsw_sp = priv;
- struct mlxsw_sp_kvdl_part *part;
-
- part = mlxsw_sp->kvdl->parts[MLXSW_SP_KVDL_PART_ID_CHUNKS];
- return mlxsw_sp_kvdl_part_occ(part);
-}
-
-static u64 mlxsw_sp_kvdl_large_chunks_occ_get(void *priv)
-{
- const struct mlxsw_sp *mlxsw_sp = priv;
- struct mlxsw_sp_kvdl_part *part;
- part = mlxsw_sp->kvdl->parts[MLXSW_SP_KVDL_PART_ID_LARGE_CHUNKS];
- return mlxsw_sp_kvdl_part_occ(part);
+ kvdl->kvdl_ops->fini(mlxsw_sp, kvdl->priv);
+ kfree(kvdl);
}
-int mlxsw_sp_kvdl_resources_register(struct mlxsw_core *mlxsw_core)
+int mlxsw_sp_kvdl_alloc(struct mlxsw_sp *mlxsw_sp,
+ enum mlxsw_sp_kvdl_entry_type type,
+ unsigned int entry_count, u32 *p_entry_index)
{
- 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_SP_KVDL_SINGLE_ALLOC_SIZE,
- DEVLINK_RESOURCE_UNIT_ENTRY);
- err = devlink_resource_register(devlink, MLXSW_SP_RESOURCE_NAME_KVD_LINEAR_SINGLES,
- MLXSW_SP_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_SP_KVDL_CHUNKS_ALLOC_SIZE,
- DEVLINK_RESOURCE_UNIT_ENTRY);
- err = devlink_resource_register(devlink, MLXSW_SP_RESOURCE_NAME_KVD_LINEAR_CHUNKS,
- MLXSW_SP_KVDL_CHUNKS_SIZE,
- MLXSW_SP_RESOURCE_KVD_LINEAR_CHUNKS,
- MLXSW_SP_RESOURCE_KVD_LINEAR,
- &size_params);
- if (err)
- return err;
+ struct mlxsw_sp_kvdl *kvdl = mlxsw_sp->kvdl;
- devlink_resource_size_params_init(&size_params, 0, kvdl_max_size,
- MLXSW_SP_KVDL_LARGE_CHUNKS_ALLOC_SIZE,
- DEVLINK_RESOURCE_UNIT_ENTRY);
- err = devlink_resource_register(devlink, MLXSW_SP_RESOURCE_NAME_KVD_LINEAR_LARGE_CHUNKS,
- MLXSW_SP_KVDL_LARGE_CHUNKS_SIZE,
- MLXSW_SP_RESOURCE_KVD_LINEAR_LARGE_CHUNKS,
- MLXSW_SP_RESOURCE_KVD_LINEAR,
- &size_params);
- return err;
+ return kvdl->kvdl_ops->alloc(mlxsw_sp, kvdl->priv, type,
+ entry_count, p_entry_index);
}
-int mlxsw_sp_kvdl_init(struct mlxsw_sp *mlxsw_sp)
+void mlxsw_sp_kvdl_free(struct mlxsw_sp *mlxsw_sp,
+ enum mlxsw_sp_kvdl_entry_type type,
+ unsigned int entry_count, int entry_index)
{
- struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
- struct mlxsw_sp_kvdl *kvdl;
- int err;
-
- kvdl = kzalloc(sizeof(*mlxsw_sp->kvdl), GFP_KERNEL);
- if (!kvdl)
- return -ENOMEM;
- mlxsw_sp->kvdl = kvdl;
-
- err = mlxsw_sp_kvdl_parts_init(mlxsw_sp);
- if (err)
- goto err_kvdl_parts_init;
-
- devlink_resource_occ_get_register(devlink,
- MLXSW_SP_RESOURCE_KVD_LINEAR,
- mlxsw_sp_kvdl_occ_get,
- mlxsw_sp);
- devlink_resource_occ_get_register(devlink,
- MLXSW_SP_RESOURCE_KVD_LINEAR_SINGLE,
- mlxsw_sp_kvdl_single_occ_get,
- mlxsw_sp);
- devlink_resource_occ_get_register(devlink,
- MLXSW_SP_RESOURCE_KVD_LINEAR_CHUNKS,
- mlxsw_sp_kvdl_chunks_occ_get,
- mlxsw_sp);
- devlink_resource_occ_get_register(devlink,
- MLXSW_SP_RESOURCE_KVD_LINEAR_LARGE_CHUNKS,
- mlxsw_sp_kvdl_large_chunks_occ_get,
- mlxsw_sp);
-
- return 0;
+ struct mlxsw_sp_kvdl *kvdl = mlxsw_sp->kvdl;
-err_kvdl_parts_init:
- kfree(mlxsw_sp->kvdl);
- return err;
+ kvdl->kvdl_ops->free(mlxsw_sp, kvdl->priv, type,
+ entry_count, entry_index);
}
-void mlxsw_sp_kvdl_fini(struct mlxsw_sp *mlxsw_sp)
+int mlxsw_sp_kvdl_alloc_count_query(struct mlxsw_sp *mlxsw_sp,
+ enum mlxsw_sp_kvdl_entry_type type,
+ unsigned int entry_count,
+ unsigned int *p_alloc_count)
{
- struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
+ struct mlxsw_sp_kvdl *kvdl = mlxsw_sp->kvdl;
- 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_sp_kvdl_parts_fini(mlxsw_sp);
- kfree(mlxsw_sp->kvdl);
+ return kvdl->kvdl_ops->alloc_size_query(mlxsw_sp, kvdl->priv, type,
+ entry_count, p_alloc_count);
}