diff options
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlxsw/spectrum.c | 11 | ||||
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlxsw/spectrum.h | 7 | ||||
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlxsw/spectrum_kvdl.c | 257 |
3 files changed, 238 insertions, 37 deletions
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c index 4d73a6f7759e..1bc3fc356084 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c @@ -3726,10 +3726,16 @@ static int mlxsw_sp_init(struct mlxsw_core *mlxsw_core, return err; } + err = mlxsw_sp_kvdl_init(mlxsw_sp); + if (err) { + dev_err(mlxsw_sp->bus_info->dev, "Failed to initialize KVDL\n"); + return err; + } + err = mlxsw_sp_fids_init(mlxsw_sp); if (err) { dev_err(mlxsw_sp->bus_info->dev, "Failed to initialize FIDs\n"); - return err; + goto err_fids_init; } err = mlxsw_sp_traps_init(mlxsw_sp); @@ -3834,6 +3840,8 @@ err_buffers_init: mlxsw_sp_traps_fini(mlxsw_sp); err_traps_init: mlxsw_sp_fids_fini(mlxsw_sp); +err_fids_init: + mlxsw_sp_kvdl_fini(mlxsw_sp); return err; } @@ -3854,6 +3862,7 @@ static void mlxsw_sp_fini(struct mlxsw_core *mlxsw_core) mlxsw_sp_buffers_fini(mlxsw_sp); mlxsw_sp_traps_fini(mlxsw_sp); mlxsw_sp_fids_fini(mlxsw_sp); + mlxsw_sp_kvdl_fini(mlxsw_sp); } static const struct mlxsw_config_profile mlxsw_sp_config_profile = { diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h index 2a2472a09d8c..035c753585a0 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h @@ -143,6 +143,7 @@ struct mlxsw_sp_mr; struct mlxsw_sp_acl; struct mlxsw_sp_counter_pool; struct mlxsw_sp_fid_core; +struct mlxsw_sp_kvdl; struct mlxsw_sp { struct mlxsw_sp_port **ports; @@ -158,9 +159,7 @@ struct mlxsw_sp { struct mlxsw_afa *afa; struct mlxsw_sp_acl *acl; struct mlxsw_sp_fid_core *fid_core; - struct { - DECLARE_BITMAP(usage, MLXSW_SP_KVD_LINEAR_SIZE); - } kvdl; + struct mlxsw_sp_kvdl *kvdl; struct notifier_block netdevice_nb; struct mlxsw_sp_counter_pool *counter_pool; @@ -411,6 +410,8 @@ mlxsw_sp_port_vlan_router_leave(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan); void mlxsw_sp_rif_destroy(struct mlxsw_sp_rif *rif); /* spectrum_kvdl.c */ +int mlxsw_sp_kvdl_init(struct mlxsw_sp *mlxsw_sp); +void mlxsw_sp_kvdl_fini(struct mlxsw_sp *mlxsw_sp); int mlxsw_sp_kvdl_alloc(struct mlxsw_sp *mlxsw_sp, unsigned int entry_count, u32 *p_entry_index); void mlxsw_sp_kvdl_free(struct mlxsw_sp *mlxsw_sp, int entry_index); diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_kvdl.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_kvdl.c index 26c26cd30c3d..512537561483 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_kvdl.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_kvdl.c @@ -39,55 +39,246 @@ #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 \ (MLXSW_SP_KVD_LINEAR_SIZE - MLXSW_SP_KVDL_CHUNKS_BASE) +#define MLXSW_SP_KVDL_CHUNKS_END \ + (MLXSW_SP_KVDL_CHUNKS_SIZE + MLXSW_SP_KVDL_CHUNKS_BASE - 1) #define MLXSW_SP_CHUNK_MAX 32 +struct mlxsw_sp_kvdl_part_info { + unsigned int part_index; + unsigned int start_index; + unsigned int end_index; + unsigned int alloc_size; +}; + +struct mlxsw_sp_kvdl_part { + struct list_head list; + const struct mlxsw_sp_kvdl_part_info *info; + unsigned long usage[0]; /* Entries */ +}; + +struct mlxsw_sp_kvdl { + struct list_head parts_list; +}; + +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; + + list_for_each_entry(part, &kvdl->parts_list, list) { + 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; + + list_for_each_entry(part, &kvdl->parts_list, list) { + 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(part->info, + entry_index); + + return 0; +} + +static void mlxsw_sp_kvdl_part_free(struct mlxsw_sp_kvdl_part *part, + u32 kvdl_index) +{ + unsigned int entry_index; + + entry_index = mlxsw_sp_kvdl_index_entry_index(part->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) { - int entry_index; - int size; - int type_base; - int type_size; - int type_entries; - - if (entry_count == 0 || entry_count > MLXSW_SP_CHUNK_MAX) { - return -EINVAL; - } else if (entry_count == 1) { - type_base = MLXSW_SP_KVDL_SINGLE_BASE; - type_size = MLXSW_SP_KVDL_SINGLE_SIZE; - type_entries = 1; - } else { - type_base = MLXSW_SP_KVDL_CHUNKS_BASE; - type_size = MLXSW_SP_KVDL_CHUNKS_SIZE; - type_entries = MLXSW_SP_CHUNK_MAX; + 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); +} + +static const struct mlxsw_sp_kvdl_part_info kvdl_parts_info[] = { + { + .part_index = 0, + .start_index = MLXSW_SP_KVDL_SINGLE_BASE, + .end_index = MLXSW_SP_KVDL_SINGLE_END, + .alloc_size = 1, + }, + { + .part_index = 1, + .start_index = MLXSW_SP_KVDL_CHUNKS_BASE, + .end_index = MLXSW_SP_KVDL_CHUNKS_END, + .alloc_size = MLXSW_SP_CHUNK_MAX, + }, +}; + +static struct mlxsw_sp_kvdl_part * +mlxsw_sp_kvdl_part_find(struct mlxsw_sp *mlxsw_sp, unsigned int part_index) +{ + struct mlxsw_sp_kvdl_part *part; + + list_for_each_entry(part, &mlxsw_sp->kvdl->parts_list, list) { + if (part->info->part_index == part_index) + return part; } - entry_index = type_base; - size = type_base + type_size; - for_each_clear_bit_from(entry_index, mlxsw_sp->kvdl.usage, size) { - int i; + return NULL; +} + +static int mlxsw_sp_kvdl_part_init(struct mlxsw_sp *mlxsw_sp, + unsigned int part_index) +{ + const struct mlxsw_sp_kvdl_part_info *info; + struct mlxsw_sp_kvdl_part *part; + unsigned int nr_entries; + size_t usage_size; + + info = &kvdl_parts_info[part_index]; + + nr_entries = (info->end_index - info->start_index + 1) / + info->alloc_size; + usage_size = BITS_TO_LONGS(nr_entries) * sizeof(unsigned long); + part = kzalloc(sizeof(*part) + usage_size, GFP_KERNEL); + if (!part) + return -ENOMEM; + + part->info = info; + list_add(&part->list, &mlxsw_sp->kvdl->parts_list); + + return 0; +} + +static void mlxsw_sp_kvdl_part_fini(struct mlxsw_sp *mlxsw_sp, + unsigned int part_index) +{ + struct mlxsw_sp_kvdl_part *part; + + part = mlxsw_sp_kvdl_part_find(mlxsw_sp, part_index); + if (!part) + return; - for (i = 0; i < type_entries; i++) - set_bit(entry_index + i, mlxsw_sp->kvdl.usage); - *p_entry_index = entry_index; - return 0; + list_del(&part->list); + kfree(part); +} + +static int mlxsw_sp_kvdl_parts_init(struct mlxsw_sp *mlxsw_sp) +{ + int err, i; + + INIT_LIST_HEAD(&mlxsw_sp->kvdl->parts_list); + + for (i = 0; i < ARRAY_SIZE(kvdl_parts_info); i++) { + err = mlxsw_sp_kvdl_part_init(mlxsw_sp, i); + if (err) + goto err_kvdl_part_init; } - return -ENOBUFS; + + return 0; + +err_kvdl_part_init: + for (i--; i >= 0; i--) + mlxsw_sp_kvdl_part_fini(mlxsw_sp, i); + return err; } -void mlxsw_sp_kvdl_free(struct mlxsw_sp *mlxsw_sp, int entry_index) +static void mlxsw_sp_kvdl_parts_fini(struct mlxsw_sp *mlxsw_sp) { - int type_entries; int i; - if (entry_index < MLXSW_SP_KVDL_CHUNKS_BASE) - type_entries = 1; - else - type_entries = MLXSW_SP_CHUNK_MAX; - for (i = 0; i < type_entries; i++) - clear_bit(entry_index + i, mlxsw_sp->kvdl.usage); + for (i = ARRAY_SIZE(kvdl_parts_info) - 1; i >= 0; i--) + mlxsw_sp_kvdl_part_fini(mlxsw_sp, i); +} + +int mlxsw_sp_kvdl_init(struct mlxsw_sp *mlxsw_sp) +{ + 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; + + return 0; + +err_kvdl_parts_init: + kfree(mlxsw_sp->kvdl); + return err; +} + +void mlxsw_sp_kvdl_fini(struct mlxsw_sp *mlxsw_sp) +{ + mlxsw_sp_kvdl_parts_fini(mlxsw_sp); + kfree(mlxsw_sp->kvdl); } |