net: devlink: report cell size of shared buffers

Shared buffer allocation is usually done in cell increments. Drivers will either round up the allocation or refuse the configuration if it's not an exact multiple of cell size. Drivers know exactly the cell size of shared buffer, so help out users by providing this information in dumps.

Jakub Kicinski committed 7 years ago

Commit bff57311 parent a98dc6a5 files · +8 −0Browse files

Unified · Split

5 files

drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c +1 −0
drivers/net/ethernet/netronome/nfp/nfp_shared_buf.c +1 −0
include/net/devlink.h +1 −0
include/uapi/linux/devlink.h +2 −0
net/core/devlink.c +3 −0

drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c+1−0

@@ -713,6 +713,7 @@ int mlxsw_sp_sb_pool_get(struct mlxsw_core *mlxsw_core, · 712 unmodified lines
713	713	pool_info->pool_type = (enum devlink_sb_pool_type) dir;
714	714	pool_info->size = mlxsw_sp_cells_bytes(mlxsw_sp, pr->size);
715	715	pool_info->threshold_type = (enum devlink_sb_threshold_type) pr->mode;
	716	+ pool_info->cell_size = mlxsw_sp->sb->cell_size;
716	717	return 0;
717	718	}
718	719

drivers/net/ethernet/netronome/nfp/nfp_shared_buf.c+1−0

@@ -48,6 +48,7 @@ int nfp_shared_buf_pool_get(struct nfp_pf *pf, unsigned int sb, u16 pool_index, · 47 unmodified lines
48	48	pool_info->pool_type = le32_to_cpu(get_data.pool_type);
49	49	pool_info->threshold_type = le32_to_cpu(get_data.threshold_type);
50	50	pool_info->size = le32_to_cpu(get_data.size) * unit_size;
	51	+ pool_info->cell_size = unit_size;
51	52
52	53	return 0;
53	54	}

include/net/devlink.h+1−0

@@ -62,6 +62,7 @@ struct devlink_sb_pool_info { · 61 unmodified lines
62	62	enum devlink_sb_pool_type pool_type;
63	63	u32 size;
64	64	enum devlink_sb_threshold_type threshold_type;
	65	+ u32 cell_size;
65	66	};
66	67
67	68	/**

include/uapi/linux/devlink.h+2−0

@@ -300,6 +300,8 @@ enum devlink_attr { · 299 unmodified lines
300	300	DEVLINK_ATTR_INFO_VERSION_NAME, /* string */
301	301	DEVLINK_ATTR_INFO_VERSION_VALUE, /* string */
302	302
	303	+ DEVLINK_ATTR_SB_POOL_CELL_SIZE, /* u32 */
	304	+
303	305	/* add new attributes above here, update the policy in devlink.c */
304	306
305	307	__DEVLINK_ATTR_MAX,

net/core/devlink.c+3−0

@@ -932,6 +932,9 @@ static int devlink_nl_sb_pool_fill(struct sk_buff msg, struct devlink devlink, · 931 unmodified lines
932	932	if (nla_put_u8(msg, DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE,
933	933	pool_info.threshold_type))
934	934	goto nla_put_failure;
	935	+ if (nla_put_u32(msg, DEVLINK_ATTR_SB_POOL_CELL_SIZE,
	936	+ pool_info.cell_size))
	937	+ goto nla_put_failure;
935	938
936	939	genlmsg_end(msg, hdr);
937	940	return 0;