Merge branch 'for-6.11/xor_fixes' into cxl-for-next

Series to fix XOR math for DPA to SPA translation
- Refactor and fold cxl_trace_hpa() into cxl_dpa_to_hpa()
- Complete DPA->HPA->SPA translation and correct XOR translation issue
- Add new method to verify a CXL target position
- Remove old method of CXL target position verifiation

1 files changed, 4 insertions, 7 deletions

diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h
index f46252373159..270014c0ab5c 100644
--- a/drivers/cxl/cxl.h
+++ b/drivers/cxl/cxl.h
@@ -432,14 +432,13 @@ struct cxl_switch_decoder {
 };
 
 struct cxl_root_decoder;
-typedef struct cxl_dport *(*cxl_calc_hb_fn)(struct cxl_root_decoder *cxlrd,
-					    int pos);
+typedef u64 (*cxl_hpa_to_spa_fn)(struct cxl_root_decoder *cxlrd, u64 hpa);
 
 /**
  * struct cxl_root_decoder - Static platform CXL address decoder
  * @res: host / parent resource for region allocations
  * @region_id: region id for next region provisioning event
- * @calc_hb: which host bridge covers the n'th position by granularity
+ * @hpa_to_spa: translate CXL host-physical-address to Platform system-physical-address
  * @platform_data: platform specific configuration data
  * @range_lock: sync region autodiscovery by address range
  * @qos_class: QoS performance class cookie
@@ -448,7 +447,7 @@ typedef struct cxl_dport *(*cxl_calc_hb_fn)(struct cxl_root_decoder *cxlrd,
 struct cxl_root_decoder {
 	struct resource *res;
 	atomic_t region_id;
-	cxl_calc_hb_fn calc_hb;
+	cxl_hpa_to_spa_fn hpa_to_spa;
 	void *platform_data;
 	struct mutex range_lock;
 	int qos_class;
@@ -774,9 +773,7 @@ bool is_root_decoder(struct device *dev);
 bool is_switch_decoder(struct device *dev);
 bool is_endpoint_decoder(struct device *dev);
 struct cxl_root_decoder *cxl_root_decoder_alloc(struct cxl_port *port,
-						unsigned int nr_targets,
-						cxl_calc_hb_fn calc_hb);
-struct cxl_dport *cxl_hb_modulo(struct cxl_root_decoder *cxlrd, int pos);
+						unsigned int nr_targets);
 struct cxl_switch_decoder *cxl_switch_decoder_alloc(struct cxl_port *port,
 						    unsigned int nr_targets);
 int cxl_decoder_add(struct cxl_decoder *cxld, int *target_map);