From 0a43bfdf030b4a84fce562462944a9a44888afaa Mon Sep 17 00:00:00 2001

From: Vishal Verma <vishal.l.verma@intel.com>

Date: Mon, 15 Aug 2022 13:22:04 -0600

Subject: [PATCH 189/217] libcxl: add a depth attribute to cxl_port

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.

Link: https://lore.kernel.org/r/20220815192214.545800-2-vishal.l.verma@intel.com

Suggested-by: Dan Williams <dan.j.williams@intel.com>

Reviewed-by: Dan Williams <dan.j.williams@intel.com>

Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>

---

 cxl/lib/libcxl.c  | 1 +

 cxl/lib/private.h | 1 +

 2 files changed, 2 insertions(+)

diff --git a/cxl/lib/libcxl.c b/cxl/lib/libcxl.c

index e52896f..145c6ba 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);

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;

-- 

2.27.0