perf/x86/uncore: Apply the unit control RB tree to MMIO uncore units

The unit control RB tree has the unit control and unit ID information
for all the units. Use it to replace the box_ctls/mmio_offsets to get
an accurate unit control address for MMIO uncore units.

Signed-off-by: Kan Liang <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Tested-by: Yunying Sun <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: Kan Liang

arch/x86/events/intel/uncore_discovery.c

@@ -606,34 +606,30 @@ static struct intel_uncore_ops generic_uncore_pci_ops = {
 
 #define UNCORE_GENERIC_MMIO_SIZE		0x4000
 
-static u64 generic_uncore_mmio_box_ctl(struct intel_uncore_box *box)
-{
-	struct intel_uncore_type *type = box->pmu->type;
-
-	if (!type->box_ctls || !type->box_ctls[box->dieid] || !type->mmio_offsets)
-		return 0;
-
-	return type->box_ctls[box->dieid] + type->mmio_offsets[box->pmu->pmu_idx];
-}
-
 void intel_generic_uncore_mmio_init_box(struct intel_uncore_box *box)
 {
-	u64 box_ctl = generic_uncore_mmio_box_ctl(box);
+	static struct intel_uncore_discovery_unit *unit;
 	struct intel_uncore_type *type = box->pmu->type;
 	resource_size_t addr;
 
-	if (!box_ctl) {
+	unit = intel_uncore_find_discovery_unit(type->boxes, box->dieid, box->pmu->pmu_idx);
+	if (!unit) {
+		pr_warn("Uncore type %d id %d: Cannot find box control address.\n",
+			type->type_id, box->pmu->pmu_idx);
+		return;
+	}
+
+	if (!unit->addr) {
 		pr_warn("Uncore type %d box %d: Invalid box control address.\n",
-			type->type_id, type->box_ids[box->pmu->pmu_idx]);
+			type->type_id, unit->id);
 		return;
 	}
 
-	addr = box_ctl;
+	addr = unit->addr;
 	box->io_addr = ioremap(addr, UNCORE_GENERIC_MMIO_SIZE);
 	if (!box->io_addr) {
 		pr_warn("Uncore type %d box %d: ioremap error for 0x%llx.\n",
-			type->type_id, type->box_ids[box->pmu->pmu_idx],
-			(unsigned long long)addr);
+			type->type_id, unit->id, (unsigned long long)addr);
 		return;
 	}
 
@@ -722,6 +718,8 @@ static bool uncore_update_uncore_type(enum uncore_access_type type_id,
 		uncore->box_ctls = type->box_ctrl_die;
 		uncore->mmio_offsets = type->box_offset;
 		uncore->mmio_map_size = UNCORE_GENERIC_MMIO_SIZE;
+		uncore->boxes = &type->units;
+		uncore->num_boxes = type->num_units;
 		break;
 	default:
 		return false;