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mlxsw: spectrum_kvdl: Add support for dynamic partition set 

Add support for dynamic partition set via the resource interface.

Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Arkadi Sharshevsky 2018-02-20 08:44:23 +01:00 committed by David S. Miller
parent 51d3c08e33
commit 887839e696
1 changed files with 53 additions and 5 deletions
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58
drivers/net/ethernet/mellanox/mlxsw/spectrum_kvdl.c
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@ -67,7 +67,7 @@ struct mlxsw_sp_kvdl_part_info {
struct mlxsw_sp_kvdl_part {
struct list_head list;
const struct mlxsw_sp_kvdl_part_info *info;
struct mlxsw_sp_kvdl_part_info *info;
unsigned long usage[0]; /* Entries */
};
@ -228,27 +228,74 @@ mlxsw_sp_kvdl_part_find(struct mlxsw_sp *mlxsw_sp, unsigned int part_index)
return NULL;
}
static void
mlxsw_sp_kvdl_part_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_kvdl_part *part, unsigned int size)
{
struct mlxsw_sp_kvdl_part_info *info = part->info;
if (list_is_last(&part->list, &mlxsw_sp->kvdl->parts_list)) {
info->end_index = size - 1;
} else {
struct mlxsw_sp_kvdl_part *last_part;
last_part = list_next_entry(part, list);
info->start_index = last_part->info->end_index + 1;
info->end_index = info->start_index + size - 1;
}
}
static int mlxsw_sp_kvdl_part_init(struct mlxsw_sp *mlxsw_sp,
unsigned int part_index)
{
struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
const struct mlxsw_sp_kvdl_part_info *info;
enum mlxsw_sp_resource_id resource_id;
struct mlxsw_sp_kvdl_part *part;
bool need_update = true;
unsigned int nr_entries;
size_t usage_size;
u64 resource_size;
int err;
info = &kvdl_parts_info[part_index];
nr_entries = (info->end_index - info->start_index + 1) /
info->alloc_size;
switch (part_index) {
case MLXSW_SP_KVDL_PART_SINGLE:
resource_id = MLXSW_SP_RESOURCE_KVD_LINEAR_SINGLE;
break;
case MLXSW_SP_KVDL_PART_CHUNKS:
resource_id = MLXSW_SP_RESOURCE_KVD_LINEAR_CHUNKS;
break;
case MLXSW_SP_KVDL_PART_LARGE_CHUNKS:
resource_id = MLXSW_SP_RESOURCE_KVD_LINEAR_LARGE_CHUNKS;
break;
}
err = devlink_resource_size_get(devlink, resource_id, &resource_size);
if (err) {
need_update = false;
resource_size = info->end_index - info->start_index + 1;
}
nr_entries = 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 -ENOMEM;
part->info = info;
list_add(&part->list, &mlxsw_sp->kvdl->parts_list);
part->info = kmemdup(info, sizeof(*part->info), GFP_KERNEL);
if (!part->info)
goto err_part_info_alloc;
list_add(&part->list, &mlxsw_sp->kvdl->parts_list);
if (need_update)
mlxsw_sp_kvdl_part_update(mlxsw_sp, part, resource_size);
return 0;
err_part_info_alloc:
kfree(part);
return -ENOMEM;
}
static void mlxsw_sp_kvdl_part_fini(struct mlxsw_sp *mlxsw_sp,
@ -261,6 +308,7 @@ static void mlxsw_sp_kvdl_part_fini(struct mlxsw_sp *mlxsw_sp,
return;
list_del(&part->list);
kfree(part->info);
kfree(part);
}