Merge branch 'for-6.5/cxl-rch-eh' into for-6.5/cxl

Pick up the first half of the RCH error handling series. The back half
needs some fixups for test regressions. Small conflicts with the PMU
work around register enumeration and setup helpers.

1 files changed, 32 insertions, 25 deletions

diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h
index bc917a75333f..76d92561af29 100644
--- a/drivers/cxl/cxl.h
+++ b/drivers/cxl/cxl.h
@@ -247,6 +247,7 @@ struct cxl_pmu_reg_map {
 
 /**
  * struct cxl_register_map - DVSEC harvested register block mapping parameters
+ * @dev: device for devm operations and logging
  * @base: virtual base of the register-block-BAR + @block_offset
  * @resource: physical resource base of the register block
  * @max_size: maximum mapping size to perform register search
@@ -256,6 +257,7 @@ struct cxl_pmu_reg_map {
  * @pmu_map: cxl_reg_maps for CXL Performance Monitoring Units
  */
 struct cxl_register_map {
+	struct device *dev;
 	void __iomem *base;
 	resource_size_t resource;
 	resource_size_t max_size;
@@ -271,11 +273,11 @@ void cxl_probe_component_regs(struct device *dev, void __iomem *base,
 			      struct cxl_component_reg_map *map);
 void cxl_probe_device_regs(struct device *dev, void __iomem *base,
 			   struct cxl_device_reg_map *map);
-int cxl_map_component_regs(struct device *dev, struct cxl_component_regs *regs,
-			   const struct cxl_register_map *map,
+int cxl_map_component_regs(const struct cxl_register_map *map,
+			   struct cxl_component_regs *regs,
 			   unsigned long map_mask);
-int cxl_map_device_regs(struct device *dev, struct cxl_device_regs *regs,
-			const struct cxl_register_map *map);
+int cxl_map_device_regs(const struct cxl_register_map *map,
+			struct cxl_device_regs *regs);
 int cxl_map_pmu_regs(struct pci_dev *pdev, struct cxl_pmu_regs *regs,
 		     struct cxl_register_map *map);
 
@@ -285,14 +287,10 @@ int cxl_find_regblock_instance(struct pci_dev *pdev, enum cxl_regloc_type type,
 			       struct cxl_register_map *map, int index);
 int cxl_find_regblock(struct pci_dev *pdev, enum cxl_regloc_type type,
 		      struct cxl_register_map *map);
-
-enum cxl_rcrb {
-	CXL_RCRB_DOWNSTREAM,
-	CXL_RCRB_UPSTREAM,
-};
-resource_size_t cxl_rcrb_to_component(struct device *dev,
-				      resource_size_t rcrb,
-				      enum cxl_rcrb which);
+int cxl_setup_regs(struct cxl_register_map *map);
+struct cxl_dport;
+resource_size_t cxl_rcd_component_reg_phys(struct device *dev,
+					   struct cxl_dport *dport);
 
 #define CXL_RESOURCE_NONE ((resource_size_t) -1)
 #define CXL_TARGET_STRLEN 20
@@ -566,7 +564,7 @@ struct cxl_dax_region {
  *		     downstream port devices to construct a CXL memory
  *		     decode hierarchy.
  * @dev: this port's device
- * @uport: PCI or platform device implementing the upstream port capability
+ * @uport_dev: PCI or platform device implementing the upstream port capability
  * @host_bridge: Shortcut to the platform attach point for this port
  * @id: id for port device-name
  * @dports: cxl_dport instances referenced by decoders
@@ -574,6 +572,7 @@ struct cxl_dax_region {
  * @regions: cxl_region_ref instances, regions mapped by this port
  * @parent_dport: dport that points to this port in the parent
  * @decoder_ida: allocator for decoder ids
+ * @comp_map: component register capability mappings
  * @nr_dports: number of entries in @dports
  * @hdm_end: track last allocated HDM decoder instance for allocation ordering
  * @commit_end: cursor to track highest committed decoder for commit ordering
@@ -585,7 +584,7 @@ struct cxl_dax_region {
  */
 struct cxl_port {
 	struct device dev;
-	struct device *uport;
+	struct device *uport_dev;
 	struct device *host_bridge;
 	int id;
 	struct xarray dports;
@@ -593,6 +592,7 @@ struct cxl_port {
 	struct xarray regions;
 	struct cxl_dport *parent_dport;
 	struct ida decoder_ida;
+	struct cxl_register_map comp_map;
 	int nr_dports;
 	int hdm_end;
 	int commit_end;
@@ -612,20 +612,25 @@ cxl_find_dport_by_dev(struct cxl_port *port, const struct device *dport_dev)
 	return xa_load(&port->dports, (unsigned long)dport_dev);
 }
 
+struct cxl_rcrb_info {
+	resource_size_t base;
+	u16 aer_cap;
+};
+
 /**
  * struct cxl_dport - CXL downstream port
- * @dport: PCI bridge or firmware device representing the downstream link
+ * @dport_dev: PCI bridge or firmware device representing the downstream link
+ * @comp_map: component register capability mappings
  * @port_id: unique hardware identifier for dport in decoder target list
- * @component_reg_phys: downstream port component registers
- * @rcrb: base address for the Root Complex Register Block
+ * @rcrb: Data about the Root Complex Register Block layout
  * @rch: Indicate whether this dport was enumerated in RCH or VH mode
  * @port: reference to cxl_port that contains this downstream port
  */
 struct cxl_dport {
-	struct device *dport;
+	struct device *dport_dev;
+	struct cxl_register_map comp_map;
 	int port_id;
-	resource_size_t component_reg_phys;
-	resource_size_t rcrb;
+	struct cxl_rcrb_info rcrb;
 	bool rch;
 	struct cxl_port *port;
 };
@@ -666,27 +671,30 @@ struct cxl_region_ref {
 /*
  * The platform firmware device hosting the root is also the top of the
  * CXL port topology. All other CXL ports have another CXL port as their
- * parent and their ->uport / host device is out-of-line of the port
+ * parent and their ->uport_dev / host device is out-of-line of the port
  * ancestry.
  */
 static inline bool is_cxl_root(struct cxl_port *port)
 {
-	return port->uport == port->dev.parent;
+	return port->uport_dev == port->dev.parent;
 }
 
 bool is_cxl_port(const struct device *dev);
 struct cxl_port *to_cxl_port(const struct device *dev);
 struct pci_bus;
-int devm_cxl_register_pci_bus(struct device *host, struct device *uport,
+int devm_cxl_register_pci_bus(struct device *host, struct device *uport_dev,
 			      struct pci_bus *bus);
 struct pci_bus *cxl_port_to_pci_bus(struct cxl_port *port);
-struct cxl_port *devm_cxl_add_port(struct device *host, struct device *uport,
+struct cxl_port *devm_cxl_add_port(struct device *host,
+				   struct device *uport_dev,
 				   resource_size_t component_reg_phys,
 				   struct cxl_dport *parent_dport);
 struct cxl_port *find_cxl_root(struct cxl_port *port);
 int devm_cxl_enumerate_ports(struct cxl_memdev *cxlmd);
 void cxl_bus_rescan(void);
 void cxl_bus_drain(void);
+struct cxl_port *cxl_pci_find_port(struct pci_dev *pdev,
+				   struct cxl_dport **dport);
 struct cxl_port *cxl_mem_find_port(struct cxl_memdev *cxlmd,
 				   struct cxl_dport **dport);
 bool schedule_cxl_memdev_detach(struct cxl_memdev *cxlmd);
@@ -696,7 +704,6 @@ struct cxl_dport *devm_cxl_add_dport(struct cxl_port *port,
 				     resource_size_t component_reg_phys);
 struct cxl_dport *devm_cxl_add_rch_dport(struct cxl_port *port,
 					 struct device *dport_dev, int port_id,
-					 resource_size_t component_reg_phys,
 					 resource_size_t rcrb);
 
 struct cxl_decoder *to_cxl_decoder(struct device *dev);