drm/xe/device: Remove unused xe_device::usm::num_vm_in_*

Those counters were used to keep track of the numbers VMs in fault mode
and in non-fault mode, to determine if the whole device was in fault mode
or not. This is no longer needed so remove those variables and their
usages.
Signed-off-by: Francois Dugast <francois.dugast@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240809155156.1955925-12-francois.dugast@intel.com

drivers/gpu/drm/xe/xe_device.h

@@ -139,16 +139,6 @@ static inline struct xe_force_wake *gt_to_fw(struct xe_gt *gt)
 
 void xe_device_assert_mem_access(struct xe_device *xe);
 
-static inline bool xe_device_in_fault_mode(struct xe_device *xe)
-{
-	return xe->usm.num_vm_in_fault_mode != 0;
-}
-
-static inline bool xe_device_in_non_fault_mode(struct xe_device *xe)
-{
-	return xe->usm.num_vm_in_non_fault_mode != 0;
-}
-
 static inline bool xe_device_has_flat_ccs(struct xe_device *xe)
 {
 	return xe->info.has_flat_ccs;

drivers/gpu/drm/xe/xe_device_types.h

@@ -368,10 +368,6 @@ struct xe_device {
 		struct xarray asid_to_vm;
 		/** @usm.next_asid: next ASID, used to cyclical alloc asids */
 		u32 next_asid;
-		/** @usm.num_vm_in_fault_mode: number of VM in fault mode */
-		u32 num_vm_in_fault_mode;
-		/** @usm.num_vm_in_non_fault_mode: number of VM in non-fault mode */
-		u32 num_vm_in_non_fault_mode;
 		/** @usm.lock: protects UM state */
 		struct mutex lock;
 	} usm;

drivers/gpu/drm/xe/xe_vm.c

@@ -1501,13 +1501,6 @@ struct xe_vm *xe_vm_create(struct xe_device *xe, u32 flags)
 	if (number_tiles > 1)
 		vm->composite_fence_ctx = dma_fence_context_alloc(1);
 
-	mutex_lock(&xe->usm.lock);
-	if (flags & XE_VM_FLAG_FAULT_MODE)
-		xe->usm.num_vm_in_fault_mode++;
-	else if (!(flags & XE_VM_FLAG_MIGRATION))
-		xe->usm.num_vm_in_non_fault_mode++;
-	mutex_unlock(&xe->usm.lock);
-
 	trace_xe_vm_create(vm);
 
 	return vm;
@@ -1621,11 +1614,6 @@ void xe_vm_close_and_put(struct xe_vm *vm)
 	up_write(&vm->lock);
 
 	mutex_lock(&xe->usm.lock);
-	if (vm->flags & XE_VM_FLAG_FAULT_MODE)
-		xe->usm.num_vm_in_fault_mode--;
-	else if (!(vm->flags & XE_VM_FLAG_MIGRATION))
-		xe->usm.num_vm_in_non_fault_mode--;
-
 	if (vm->usm.asid) {
 		void *lookup;