[PATCH v6 6/9] cxl/region: Log the coherency model at region creation

[Davidlohr Bueso <dave@stgolabs.net>]

Region assembly emits plenty of debug information - resources,
interleave geometry, target placement - but not the coherency model
the region operates in.

Signed-off-by: Davidlohr Bueso <dave@stgolabs.net>
---
 drivers/cxl/core/region.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c
index 1b8284f66e61..7c11d5788d99 100644
--- a/drivers/cxl/core/region.c
+++ b/drivers/cxl/core/region.c
@@ -2746,6 +2746,17 @@ void kill_regions(struct cxl_root_decoder *cxlrd)
 		unregister_region(cxlr);
 }
 
+static const char *cxl_region_coherency(struct cxl_region *cxlr)
+{
+	if (cxlr->type == CXL_DECODER_HOSTONLYMEM)
+		return "HDM-H";
+
+	if (cxl_root_decoder_is_bi(cxlr->cxlrd))
+		return "HDM-DB";
+
+	return "HDM-D";
+}
+
 /**
  * devm_cxl_add_region - Adds a region to a decoder
  * @cxlrd: root decoder
@@ -2790,8 +2801,9 @@ static struct cxl_region *devm_cxl_add_region(struct cxl_root_decoder *cxlrd,
 		return ERR_PTR(rc);
 	}
 
-	dev_dbg(port->uport_dev, "%s: created %s\n",
-		dev_name(&cxlrd->cxlsd.cxld.dev), dev_name(dev));
+	dev_dbg(port->uport_dev, "%s: created %s %s\n",
+		dev_name(&cxlrd->cxlsd.cxld.dev), cxl_region_coherency(cxlr),
+		dev_name(dev));
 	return cxlr;
 err:
 	put_device(dev);
-- 
2.39.5