[ndctl PATCH v3 01/11] libcxl: add a depth attribute to cxl_port

[Vishal Verma]

Add a depth attribute to the cxl_port structure, that can be used for
calculating its distance from the root port, and will be needed for
interleave granularity calculations during region creation.

Suggested-by: Dan Williams <dan.j.willi...@intel.com>
Reviewed-by: Dan Williams <dan.j.willi...@intel.com>
Signed-off-by: Vishal Verma <vishal.l.ve...@intel.com>
---
 cxl/lib/private.h | 1 +
 cxl/lib/libcxl.c  | 1 +
 2 files changed, 2 insertions(+)

diff --git a/cxl/lib/private.h b/cxl/lib/private.h
index f6d4573..832a815 100644
--- a/cxl/lib/private.h
+++ b/cxl/lib/private.h
@@ -66,6 +66,7 @@ struct cxl_port {
        int decoders_init;
        int dports_init;
        int nr_dports;
+       int depth;
        struct cxl_ctx *ctx;
        struct cxl_bus *bus;
        enum cxl_port_type type;
diff --git a/cxl/lib/libcxl.c b/cxl/lib/libcxl.c
index be6bc2c..946cd4b 100644
--- a/cxl/lib/libcxl.c
+++ b/cxl/lib/libcxl.c
@@ -744,6 +744,7 @@ static int cxl_port_init(struct cxl_port *port, struct 
cxl_port *parent_port,
        port->type = type;
        port->parent = parent_port;
        port->type = type;
+       port->depth = parent_port ? parent_port->depth + 1 : 0;
 
        list_head_init(&port->child_ports);
        list_head_init(&port->endpoints);
-- 
2.37.1