linux-kernel - [PATCH v4 16/23] cxl/pci: Remove Component Register base address from struct cxl_dev

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Message-ID: <20230523232214.55282-17-terry.bowman@amd.com>
Date:   Tue, 23 May 2023 18:22:07 -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 v4 16/23] cxl/pci: Remove Component Register base address from struct cxl_dev_state

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

The Component Register base address @component_reg_phys is no longer
used after the rework of the Component Register setup which now uses
struct member @comp_map instead. Remove the base address.

Signed-off-by: Robert Richter <rrichter@....com>
Signed-off-by: Terry Bowman <terry.bowman@....com>
---
 drivers/cxl/cxlmem.h | 2 --
 drivers/cxl/mem.c    | 4 ++--
 drivers/cxl/pci.c    | 3 ---
 3 files changed, 2 insertions(+), 7 deletions(-)

diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h
index 2823c5aaf3db..7b5b2d3187bf 100644
--- a/drivers/cxl/cxlmem.h
+++ b/drivers/cxl/cxlmem.h
@@ -287,7 +287,6 @@ struct cxl_poison_state {
  * @active_persistent_bytes: sum of hard + soft persistent
  * @next_volatile_bytes: volatile capacity change pending device reset
  * @next_persistent_bytes: persistent capacity change pending device reset
- * @component_reg_phys: register base of component registers
  * @info: Cached DVSEC information about the device.
  * @serial: PCIe Device Serial Number
  * @event: event log driver state
@@ -326,7 +325,6 @@ struct cxl_dev_state {
 	u64 next_volatile_bytes;
 	u64 next_persistent_bytes;
 
-	resource_size_t component_reg_phys;
 	u64 serial;
 
 	struct cxl_event_state event;
diff --git a/drivers/cxl/mem.c b/drivers/cxl/mem.c
index 0643852444f3..618e839919eb 100644
--- a/drivers/cxl/mem.c
+++ b/drivers/cxl/mem.c
@@ -49,7 +49,6 @@ static int devm_cxl_add_endpoint(struct device *host, struct cxl_memdev *cxlmd,
 				 struct cxl_dport *parent_dport)
 {
 	struct cxl_port *parent_port = parent_dport->port;
-	struct cxl_dev_state *cxlds = cxlmd->cxlds;
 	struct cxl_port *endpoint, *iter, *down;
 	int rc;
 
@@ -65,8 +64,9 @@ static int devm_cxl_add_endpoint(struct device *host, struct cxl_memdev *cxlmd,
 		ep->next = down;
 	}
 
+	/* The Endpoint's component regs are located in cxlds. */
 	endpoint = devm_cxl_add_port(host, &cxlmd->dev,
-				     cxlds->component_reg_phys,
+				     CXL_RESOURCE_NONE,
 				     parent_dport);
 	if (IS_ERR(endpoint))
 		return PTR_ERR(endpoint);
diff --git a/drivers/cxl/pci.c b/drivers/cxl/pci.c
index 00983770ea7b..0db71493db5d 100644
--- a/drivers/cxl/pci.c
+++ b/drivers/cxl/pci.c
@@ -661,7 +661,6 @@ static int cxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	 * If the component registers can't be found, the cxl_pci driver may
 	 * still be useful for management functions so don't return an error.
 	 */
-	cxlds->component_reg_phys = CXL_RESOURCE_NONE;
 	rc = cxl_pci_setup_regs(pdev, CXL_REGLOC_RBI_COMPONENT,
 				&cxlds->comp_map);
 	if (rc)
@@ -669,8 +668,6 @@ static int cxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	else if (!cxlds->comp_map.component_map.ras.valid)
 		dev_dbg(&pdev->dev, "RAS registers not found\n");
 
-	cxlds->component_reg_phys = cxlds->comp_map.resource;
-
 	rc = cxl_map_component_regs(&cxlds->comp_map, &cxlds->regs.component,
 				    BIT(CXL_CM_CAP_CAP_ID_RAS));
 	if (rc)
-- 
2.34.1