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[ndctl,v2,01/10] libcxl: add a depth attribute to cxl_port

Message ID 20220810230914.549611-2-vishal.l.verma@intel.com
State Superseded
Headers show
Series cxl: add region management | expand

Commit Message

Verma, Vishal L Aug. 10, 2022, 11:09 p.m. UTC 
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.williams@intel.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
---
 cxl/lib/private.h | 1 +
 cxl/lib/libcxl.c  | 1 +
 2 files changed, 2 insertions(+)
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Patch

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);