linux-kernel - [PATCH v7 12/27] cxl/mem: Prepare for early RCH dport component register setup

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Date:   Thu, 22 Jun 2023 15:55:08 -0500
From:   Terry Bowman <terry.bowman@....com>
To:     <alison.schofield@...el.com>, <vishal.l.verma@...el.com>,
        <ira.weiny@...el.com>, <bwidawsk@...nel.org>,
        <dan.j.williams@...el.com>, <dave.jiang@...el.com>,
        <Jonathan.Cameron@...wei.com>, <linux-cxl@...r.kernel.org>
CC:     <terry.bowman@....com>, <rrichter@....com>,
        <linux-kernel@...r.kernel.org>, <bhelgaas@...gle.com>
Subject: [PATCH v7 12/27] cxl/mem: Prepare for early RCH dport component register setup

From: Robert Richter <rrichter@....com>

In order to move the RCH dport component register setup to cxl_pci the
base address must be stored in CXL device state (cxlds) for both
modes, RCH and VH. Store it in cxlds->component_reg_phys and use it
for endpoint creation.

Signed-off-by: Robert Richter <rrichter@....com>
Signed-off-by: Terry Bowman <terry.bowman@....com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
---
 drivers/cxl/mem.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/cxl/mem.c b/drivers/cxl/mem.c
index 4cc461c22b8b..7638a7f8f333 100644
--- a/drivers/cxl/mem.c
+++ b/drivers/cxl/mem.c
@@ -51,7 +51,6 @@ static int devm_cxl_add_endpoint(struct device *host, struct cxl_memdev *cxlmd,
 	struct cxl_port *parent_port = parent_dport->port;
 	struct cxl_dev_state *cxlds = cxlmd->cxlds;
 	struct cxl_port *endpoint, *iter, *down;
-	resource_size_t component_reg_phys;
 	int rc;
 
 	/*
@@ -72,11 +71,11 @@ static int devm_cxl_add_endpoint(struct device *host, struct cxl_memdev *cxlmd,
 	 * typical register locator mechanism.
 	 */
 	if (parent_dport->rch && cxlds->component_reg_phys == CXL_RESOURCE_NONE)
-		component_reg_phys =
+		cxlds->component_reg_phys =
 			cxl_rcd_component_reg_phys(&cxlmd->dev, parent_dport);
-	else
-		component_reg_phys = cxlds->component_reg_phys;
-	endpoint = devm_cxl_add_port(host, &cxlmd->dev, component_reg_phys,
+
+	endpoint = devm_cxl_add_port(host, &cxlmd->dev,
+				     cxlds->component_reg_phys,
 				     parent_dport);
 	if (IS_ERR(endpoint))
 		return PTR_ERR(endpoint);
-- 
2.34.1