drm/xe/uapi: Kill DRM_XE_UFENCE_WAIT_VM_ERROR

This is not used nor does it align VM async document, kill this.
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

drivers/gpu/drm/xe/xe_vm.c

@@ -1621,9 +1621,6 @@ void xe_vm_close_and_put(struct xe_vm *vm)
 		xe_vma_destroy_unlocked(vma);
 	}
 
-	if (vm->async_ops.error_capture.addr)
-		wake_up_all(&vm->async_ops.error_capture.wq);
-
 	xe_assert(xe, list_empty(&vm->extobj.list));
 	up_write(&vm->lock);
 

drivers/gpu/drm/xe/xe_vm_types.h

@@ -215,17 +215,6 @@ struct xe_vm {
 		struct work_struct work;
 		/** @lock: protects list of pending async VM ops and fences */
 		spinlock_t lock;
-		/** @error_capture: error capture state */
-		struct {
-			/** @mm: user MM */
-			struct mm_struct *mm;
-			/**
-			 * @addr: user pointer to copy error capture state too
-			 */
-			u64 addr;
-			/** @wq: user fence wait queue for VM errors */
-			wait_queue_head_t wq;
-		} error_capture;
 		/** @fence: fence state */
 		struct {
 			/** @context: context of async fence */

drivers/gpu/drm/xe/xe_wait_user_fence.c

@@ -13,7 +13,6 @@
 #include "xe_device.h"
 #include "xe_gt.h"
 #include "xe_macros.h"
-#include "xe_vm.h"
 
 static int do_compare(u64 addr, u64 value, u64 mask, u16 op)
 {
@@ -81,8 +80,7 @@ static int check_hw_engines(struct xe_device *xe,
 }
 
 #define VALID_FLAGS	(DRM_XE_UFENCE_WAIT_SOFT_OP | \
-			 DRM_XE_UFENCE_WAIT_ABSTIME | \
-			 DRM_XE_UFENCE_WAIT_VM_ERROR)
+			 DRM_XE_UFENCE_WAIT_ABSTIME)
 #define MAX_OP		DRM_XE_UFENCE_WAIT_LTE
 
 static long to_jiffies_timeout(struct xe_device *xe,
@@ -137,11 +135,9 @@ int xe_wait_user_fence_ioctl(struct drm_device *dev, void *data,
 	struct drm_xe_engine_class_instance eci[XE_HW_ENGINE_MAX_INSTANCE];
 	struct drm_xe_engine_class_instance __user *user_eci =
 		u64_to_user_ptr(args->instances);
-	struct xe_vm *vm = NULL;
 	u64 addr = args->addr;
 	int err;
-	bool no_engines = args->flags & DRM_XE_UFENCE_WAIT_SOFT_OP ||
-		args->flags & DRM_XE_UFENCE_WAIT_VM_ERROR;
+	bool no_engines = args->flags & DRM_XE_UFENCE_WAIT_SOFT_OP;
 	long timeout;
 	ktime_t start;
 
@@ -162,8 +158,7 @@ int xe_wait_user_fence_ioctl(struct drm_device *dev, void *data,
 	if (XE_IOCTL_DBG(xe, !no_engines && !args->num_engines))
 		return -EINVAL;
 
-	if (XE_IOCTL_DBG(xe, !(args->flags & DRM_XE_UFENCE_WAIT_VM_ERROR) &&
-			 addr & 0x7))
+	if (XE_IOCTL_DBG(xe, addr & 0x7))
 		return -EINVAL;
 
 	if (XE_IOCTL_DBG(xe, args->num_engines > XE_HW_ENGINE_MAX_INSTANCE))
@@ -181,22 +176,6 @@ int xe_wait_user_fence_ioctl(struct drm_device *dev, void *data,
 			return -EINVAL;
 	}
 
-	if (args->flags & DRM_XE_UFENCE_WAIT_VM_ERROR) {
-		if (XE_IOCTL_DBG(xe, args->vm_id >> 32))
-			return -EINVAL;
-
-		vm = xe_vm_lookup(to_xe_file(file), args->vm_id);
-		if (XE_IOCTL_DBG(xe, !vm))
-			return -ENOENT;
-
-		if (XE_IOCTL_DBG(xe, !vm->async_ops.error_capture.addr)) {
-			xe_vm_put(vm);
-			return -EOPNOTSUPP;
-		}
-
-		addr = vm->async_ops.error_capture.addr;
-	}
-
 	timeout = to_jiffies_timeout(xe, args);
 
 	start = ktime_get();
@@ -207,15 +186,8 @@ int xe_wait_user_fence_ioctl(struct drm_device *dev, void *data,
 	 * hardware engine. Open coding as 'do_compare' can sleep which doesn't
 	 * work with the wait_event_* macros.
 	 */
-	if (vm)
-		add_wait_queue(&vm->async_ops.error_capture.wq, &w_wait);
-	else
 	add_wait_queue(&xe->ufence_wq, &w_wait);
 	for (;;) {
-		if (vm && xe_vm_is_closed(vm)) {
-			err = -ENODEV;
-			break;
-		}
 		err = do_compare(addr, args->value, args->mask, args->op);
 		if (err <= 0)
 			break;
@@ -232,12 +204,7 @@ int xe_wait_user_fence_ioctl(struct drm_device *dev, void *data,
 
 		timeout = wait_woken(&w_wait, TASK_INTERRUPTIBLE, timeout);
 	}
-	if (vm) {
-		remove_wait_queue(&vm->async_ops.error_capture.wq, &w_wait);
-		xe_vm_put(vm);
-	} else {
 	remove_wait_queue(&xe->ufence_wq, &w_wait);
-	}
 
 	if (!(args->flags & DRM_XE_UFENCE_WAIT_ABSTIME)) {
 		args->timeout -= ktime_to_ns(ktime_sub(ktime_get(), start));

include/uapi/drm/xe_drm.h

@@ -905,19 +905,11 @@ struct drm_xe_wait_user_fence {
 	/** @extensions: Pointer to the first extension struct, if any */
 	__u64 extensions;
 
-	union {
 	/**
 	 * @addr: user pointer address to wait on, must qword aligned
 	 */
 	__u64 addr;
 
-		/**
-		 * @vm_id: The ID of the VM which encounter an error used with
-		 * DRM_XE_UFENCE_WAIT_VM_ERROR. Upper 32 bits must be clear.
-		 */
-		__u64 vm_id;
-	};
-
 #define DRM_XE_UFENCE_WAIT_EQ	0
 #define DRM_XE_UFENCE_WAIT_NEQ	1
 #define DRM_XE_UFENCE_WAIT_GT	2
@@ -929,7 +921,6 @@ struct drm_xe_wait_user_fence {
 
 #define DRM_XE_UFENCE_WAIT_SOFT_OP	(1 << 0)	/* e.g. Wait on VM bind */
 #define DRM_XE_UFENCE_WAIT_ABSTIME	(1 << 1)
-#define DRM_XE_UFENCE_WAIT_VM_ERROR	(1 << 2)
 	/** @flags: wait flags */
 	__u16 flags;