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path: root/drivers/net/ethernet/mellanox/mlxsw/spectrum1_kvdl.c
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Diffstat (limited to 'drivers/net/ethernet/mellanox/mlxsw/spectrum1_kvdl.c')
-rw-r--r--drivers/net/ethernet/mellanox/mlxsw/spectrum1_kvdl.c428
1 files changed, 428 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum1_kvdl.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum1_kvdl.c
new file mode 100644
index 000000000000..09ee0a807747
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum1_kvdl.c
@@ -0,0 +1,428 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/* Copyright (c) 2018 Mellanox Technologies. All rights reserved */
+
+#include <linux/kernel.h>
+#include <linux/bitops.h>
+
+#include "spectrum.h"
+
+#define MLXSW_SP1_KVDL_SINGLE_BASE 0
+#define MLXSW_SP1_KVDL_SINGLE_SIZE 16384
+#define MLXSW_SP1_KVDL_SINGLE_END \
+ (MLXSW_SP1_KVDL_SINGLE_SIZE + MLXSW_SP1_KVDL_SINGLE_BASE - 1)
+
+#define MLXSW_SP1_KVDL_CHUNKS_BASE \
+ (MLXSW_SP1_KVDL_SINGLE_BASE + MLXSW_SP1_KVDL_SINGLE_SIZE)
+#define MLXSW_SP1_KVDL_CHUNKS_SIZE 49152
+#define MLXSW_SP1_KVDL_CHUNKS_END \
+ (MLXSW_SP1_KVDL_CHUNKS_SIZE + MLXSW_SP1_KVDL_CHUNKS_BASE - 1)
+
+#define MLXSW_SP1_KVDL_LARGE_CHUNKS_BASE \
+ (MLXSW_SP1_KVDL_CHUNKS_BASE + MLXSW_SP1_KVDL_CHUNKS_SIZE)
+#define MLXSW_SP1_KVDL_LARGE_CHUNKS_SIZE \
+ (MLXSW_SP_KVD_LINEAR_SIZE - MLXSW_SP1_KVDL_LARGE_CHUNKS_BASE)
+#define MLXSW_SP1_KVDL_LARGE_CHUNKS_END \
+ (MLXSW_SP1_KVDL_LARGE_CHUNKS_SIZE + MLXSW_SP1_KVDL_LARGE_CHUNKS_BASE - 1)
+
+#define MLXSW_SP1_KVDL_SINGLE_ALLOC_SIZE 1
+#define MLXSW_SP1_KVDL_CHUNKS_ALLOC_SIZE 32
+#define MLXSW_SP1_KVDL_LARGE_CHUNKS_ALLOC_SIZE 512
+
+struct mlxsw_sp1_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_sp1_kvdl_part_id {
+ MLXSW_SP1_KVDL_PART_ID_SINGLE,
+ MLXSW_SP1_KVDL_PART_ID_CHUNKS,
+ MLXSW_SP1_KVDL_PART_ID_LARGE_CHUNKS,
+};
+
+#define MLXSW_SP1_KVDL_PART_INFO(id) \
+[MLXSW_SP1_KVDL_PART_ID_##id] = { \
+ .start_index = MLXSW_SP1_KVDL_##id##_BASE, \
+ .end_index = MLXSW_SP1_KVDL_##id##_END, \
+ .alloc_size = MLXSW_SP1_KVDL_##id##_ALLOC_SIZE, \
+ .resource_id = MLXSW_SP_RESOURCE_KVD_LINEAR_##id, \
+}
+
+static const struct mlxsw_sp1_kvdl_part_info mlxsw_sp1_kvdl_parts_info[] = {
+ MLXSW_SP1_KVDL_PART_INFO(SINGLE),
+ MLXSW_SP1_KVDL_PART_INFO(CHUNKS),
+ MLXSW_SP1_KVDL_PART_INFO(LARGE_CHUNKS),
+};
+
+#define MLXSW_SP1_KVDL_PARTS_INFO_LEN ARRAY_SIZE(mlxsw_sp1_kvdl_parts_info)
+
+struct mlxsw_sp1_kvdl_part {
+ struct mlxsw_sp1_kvdl_part_info info;
+ unsigned long usage[0]; /* Entries */
+};
+
+struct mlxsw_sp1_kvdl {
+ struct mlxsw_sp1_kvdl_part *parts[MLXSW_SP1_KVDL_PARTS_INFO_LEN];
+};
+
+static struct mlxsw_sp1_kvdl_part *
+mlxsw_sp1_kvdl_alloc_size_part(struct mlxsw_sp1_kvdl *kvdl,
+ unsigned int alloc_size)
+{
+ struct mlxsw_sp1_kvdl_part *part, *min_part = NULL;
+ int i;
+
+ for (i = 0; i < MLXSW_SP1_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_sp1_kvdl_part *
+mlxsw_sp1_kvdl_index_part(struct mlxsw_sp1_kvdl *kvdl, u32 kvdl_index)
+{
+ struct mlxsw_sp1_kvdl_part *part;
+ int i;
+
+ for (i = 0; i < MLXSW_SP1_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_sp1_kvdl_to_kvdl_index(const struct mlxsw_sp1_kvdl_part_info *info,
+ unsigned int entry_index)
+{
+ return info->start_index + entry_index * info->alloc_size;
+}
+
+static unsigned int
+mlxsw_sp1_kvdl_to_entry_index(const struct mlxsw_sp1_kvdl_part_info *info,
+ u32 kvdl_index)
+{
+ return (kvdl_index - info->start_index) / info->alloc_size;
+}
+
+static int mlxsw_sp1_kvdl_part_alloc(struct mlxsw_sp1_kvdl_part *part,
+ u32 *p_kvdl_index)
+{
+ const struct mlxsw_sp1_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_sp1_kvdl_to_kvdl_index(info, entry_index);
+
+ return 0;
+}
+
+static void mlxsw_sp1_kvdl_part_free(struct mlxsw_sp1_kvdl_part *part,
+ u32 kvdl_index)
+{
+ const struct mlxsw_sp1_kvdl_part_info *info = &part->info;
+ unsigned int entry_index;
+
+ entry_index = mlxsw_sp1_kvdl_to_entry_index(info, kvdl_index);
+ __clear_bit(entry_index, part->usage);
+}
+
+static int mlxsw_sp1_kvdl_alloc(struct mlxsw_sp *mlxsw_sp, void *priv,
+ enum mlxsw_sp_kvdl_entry_type type,
+ unsigned int entry_count,
+ u32 *p_entry_index)
+{
+ struct mlxsw_sp1_kvdl *kvdl = priv;
+ struct mlxsw_sp1_kvdl_part *part;
+
+ /* Find partition with smallest allocation size satisfying the
+ * requested size.
+ */
+ part = mlxsw_sp1_kvdl_alloc_size_part(kvdl, entry_count);
+ if (IS_ERR(part))
+ return PTR_ERR(part);
+
+ return mlxsw_sp1_kvdl_part_alloc(part, p_entry_index);
+}
+
+static void mlxsw_sp1_kvdl_free(struct mlxsw_sp *mlxsw_sp, void *priv,
+ enum mlxsw_sp_kvdl_entry_type type,
+ unsigned int entry_count, int entry_index)
+{
+ struct mlxsw_sp1_kvdl *kvdl = priv;
+ struct mlxsw_sp1_kvdl_part *part;
+
+ part = mlxsw_sp1_kvdl_index_part(kvdl, entry_index);
+ if (IS_ERR(part))
+ return;
+ mlxsw_sp1_kvdl_part_free(part, entry_index);
+}
+
+static int mlxsw_sp1_kvdl_alloc_size_query(struct mlxsw_sp *mlxsw_sp,
+ void *priv,
+ enum mlxsw_sp_kvdl_entry_type type,
+ unsigned int entry_count,
+ unsigned int *p_alloc_size)
+{
+ struct mlxsw_sp1_kvdl *kvdl = priv;
+ struct mlxsw_sp1_kvdl_part *part;
+
+ part = mlxsw_sp1_kvdl_alloc_size_part(kvdl, entry_count);
+ if (IS_ERR(part))
+ return PTR_ERR(part);
+
+ *p_alloc_size = part->info.alloc_size;
+
+ return 0;
+}
+
+static void mlxsw_sp1_kvdl_part_update(struct mlxsw_sp1_kvdl_part *part,
+ struct mlxsw_sp1_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_sp1_kvdl_part *
+mlxsw_sp1_kvdl_part_init(struct mlxsw_sp *mlxsw_sp,
+ const struct mlxsw_sp1_kvdl_part_info *info,
+ struct mlxsw_sp1_kvdl_part *part_prev)
+{
+ struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
+ struct mlxsw_sp1_kvdl_part *part;
+ bool need_update = true;
+ unsigned int nr_entries;
+ size_t usage_size;
+ u64 resource_size;
+ 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_sp1_kvdl_part_update(part, part_prev, resource_size);
+ return part;
+}
+
+static void mlxsw_sp1_kvdl_part_fini(struct mlxsw_sp1_kvdl_part *part)
+{
+ kfree(part);
+}
+
+static int mlxsw_sp1_kvdl_parts_init(struct mlxsw_sp *mlxsw_sp,
+ struct mlxsw_sp1_kvdl *kvdl)
+{
+ const struct mlxsw_sp1_kvdl_part_info *info;
+ struct mlxsw_sp1_kvdl_part *part_prev = NULL;
+ int err, i;
+
+ for (i = 0; i < MLXSW_SP1_KVDL_PARTS_INFO_LEN; i++) {
+ info = &mlxsw_sp1_kvdl_parts_info[i];
+ kvdl->parts[i] = mlxsw_sp1_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];
+ }
+ return 0;
+
+err_kvdl_part_init:
+ for (i--; i >= 0; i--)
+ mlxsw_sp1_kvdl_part_fini(kvdl->parts[i]);
+ return err;
+}
+
+static void mlxsw_sp1_kvdl_parts_fini(struct mlxsw_sp1_kvdl *kvdl)
+{
+ int i;
+
+ for (i = 0; i < MLXSW_SP1_KVDL_PARTS_INFO_LEN; i++)
+ mlxsw_sp1_kvdl_part_fini(kvdl->parts[i]);
+}
+
+static u64 mlxsw_sp1_kvdl_part_occ(struct mlxsw_sp1_kvdl_part *part)
+{
+ const struct mlxsw_sp1_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_sp1_kvdl_occ_get(void *priv)
+{
+ const struct mlxsw_sp1_kvdl *kvdl = priv;
+ u64 occ = 0;
+ int i;
+
+ for (i = 0; i < MLXSW_SP1_KVDL_PARTS_INFO_LEN; i++)
+ occ += mlxsw_sp1_kvdl_part_occ(kvdl->parts[i]);
+
+ return occ;
+}
+
+static u64 mlxsw_sp1_kvdl_single_occ_get(void *priv)
+{
+ const struct mlxsw_sp1_kvdl *kvdl = priv;
+ struct mlxsw_sp1_kvdl_part *part;
+
+ part = kvdl->parts[MLXSW_SP1_KVDL_PART_ID_SINGLE];
+ return mlxsw_sp1_kvdl_part_occ(part);
+}
+
+static u64 mlxsw_sp1_kvdl_chunks_occ_get(void *priv)
+{
+ const struct mlxsw_sp1_kvdl *kvdl = priv;
+ struct mlxsw_sp1_kvdl_part *part;
+
+ part = kvdl->parts[MLXSW_SP1_KVDL_PART_ID_CHUNKS];
+ return mlxsw_sp1_kvdl_part_occ(part);
+}
+
+static u64 mlxsw_sp1_kvdl_large_chunks_occ_get(void *priv)
+{
+ const struct mlxsw_sp1_kvdl *kvdl = priv;
+ struct mlxsw_sp1_kvdl_part *part;
+
+ part = kvdl->parts[MLXSW_SP1_KVDL_PART_ID_LARGE_CHUNKS];
+ return mlxsw_sp1_kvdl_part_occ(part);
+}
+
+static int mlxsw_sp1_kvdl_init(struct mlxsw_sp *mlxsw_sp, void *priv)
+{
+ 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;
+}
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