Merge branch 'for-6.7/cxl' into cxl/next

Pickup some misc. CXL updates for v6.7.

Author: djbw

MAINTAINERS

@@ -5183,6 +5183,7 @@ L:	linux-cxl@vger.kernel.org
 S:	Maintained
 F:	drivers/cxl/
 F:	include/uapi/linux/cxl_mem.h
+F:	tools/testing/cxl/
 
 COMPUTE EXPRESS LINK PMU (CPMU)
 M:	Jonathan Cameron <jonathan.cameron@huawei.com>

drivers/cxl/core/mbox.c

@@ -1249,8 +1249,7 @@ int cxl_mem_create_range_info(struct cxl_memdev_state *mds)
 		return 0;
 	}
 
-	cxlds->dpa_res =
-		(struct resource)DEFINE_RES_MEM(0, mds->total_bytes);
+	cxlds->dpa_res = DEFINE_RES_MEM(0, mds->total_bytes);
 
 	if (mds->partition_align_bytes == 0) {
 		rc = add_dpa_res(dev, &cxlds->dpa_res, &cxlds->ram_res, 0,

drivers/cxl/core/port.c

@@ -1522,7 +1522,11 @@ int devm_cxl_enumerate_ports(struct cxl_memdev *cxlmd)
 		struct cxl_dport *dport;
 		struct cxl_port *port;
 
-		if (!dport_dev)
+		/*
+		 * The terminal "grandparent" in PCI is NULL and @platform_bus
+		 * for platform devices
+		 */
+		if (!dport_dev || dport_dev == &platform_bus)
 			return 0;
 
 		uport_dev = dport_dev->parent;

drivers/cxl/core/region.c

@@ -123,7 +123,7 @@ static int cxl_region_invalidate_memregion(struct cxl_region *cxlr)
 {
 	if (!cpu_cache_has_invalidate_memregion()) {
 		if (IS_ENABLED(CONFIG_CXL_REGION_INVALIDATION_TEST)) {
-			dev_warn_once(
+			dev_info_once(
 				&cxlr->dev,
 				"Bypassing cpu_cache_invalidate_memregion() for testing!\n");
 			return 0;

drivers/cxl/pci.c

@@ -85,6 +85,10 @@ static int cxl_pci_mbox_wait_for_doorbell(struct cxl_dev_state *cxlds)
 			    status & CXLMDEV_DEV_FATAL ? " fatal" : "",        \
 			    status & CXLMDEV_FW_HALT ? " firmware-halt" : "")
 
+/*
+ * Threaded irq dev_id's must be globally unique.  cxl_dev_id provides a unique
+ * wrapper object for each irq within the same cxlds.
+ */
 struct cxl_dev_id {
 	struct cxl_dev_state *cxlds;
 };
@@ -95,7 +99,6 @@ static int cxl_request_irq(struct cxl_dev_state *cxlds, int irq,
 	struct device *dev = cxlds->dev;
 	struct cxl_dev_id *dev_id;
 
-	/* dev_id must be globally unique and must contain the cxlds */
 	dev_id = devm_kzalloc(dev, sizeof(*dev_id), GFP_KERNEL);
 	if (!dev_id)
 		return -ENOMEM;