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Commit 887839e6 authored by Arkadi Sharshevsky's avatar Arkadi Sharshevsky Committed by David S. Miller
Browse files

mlxsw: spectrum_kvdl: Add support for dynamic partition set 



Add support for dynamic partition set via the resource interface.

Signed-off-by: default avatarArkadi Sharshevsky <arkadis@mellanox.com>
Signed-off-by: default avatarJiri Pirko <jiri@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 51d3c08e

drivers/net/ethernet/mellanox/mlxsw/spectrum_kvdl.c

+53 −5
Original line number Diff line number Diff line
@@ -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);

}