drm/xe: Kill XE_VM_PROPERTY_BIND_OP_ERROR_CAPTURE_ADDRESS extension

This extension is currently not used and it is not aligned with
the error handling on async VM_BIND. Let's remove it and along with
that, since it was the only extension for the vm_create, remove VM
extension entirely.

v2: rebase on top of the removal of drm_xe_ext_exec_queue_set_property

Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Signed-off-by: Francois Dugast <francois.dugast@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>

drivers/gpu/drm/xe/xe_vm.c

@@ -1531,37 +1531,6 @@ static void flush_async_ops(struct xe_vm *vm)
 	flush_work(&vm->async_ops.work);
 }
 
-static void vm_error_capture(struct xe_vm *vm, int err,
-			     u32 op, u64 addr, u64 size)
-{
-	struct drm_xe_vm_bind_op_error_capture capture;
-	u64 __user *address =
-		u64_to_user_ptr(vm->async_ops.error_capture.addr);
-	bool in_kthread = !current->mm;
-
-	capture.error = err;
-	capture.op = op;
-	capture.addr = addr;
-	capture.size = size;
-
-	if (in_kthread) {
-		if (!mmget_not_zero(vm->async_ops.error_capture.mm))
-			goto mm_closed;
-		kthread_use_mm(vm->async_ops.error_capture.mm);
-	}
-
-	if (copy_to_user(address, &capture, sizeof(capture)))
-		drm_warn(&vm->xe->drm, "Copy to user failed");
-
-	if (in_kthread) {
-		kthread_unuse_mm(vm->async_ops.error_capture.mm);
-		mmput(vm->async_ops.error_capture.mm);
-	}
-
-mm_closed:
-	wake_up_all(&vm->async_ops.error_capture.wq);
-}
-
 static void xe_vm_close(struct xe_vm *vm)
 {
 	down_write(&vm->lock);
@@ -2036,91 +2005,6 @@ static int xe_vm_unbind(struct xe_vm *vm, struct xe_vma *vma,
 	return 0;
 }
 
-static int vm_set_error_capture_address(struct xe_device *xe, struct xe_vm *vm,
-					u64 value)
-{
-	if (XE_IOCTL_DBG(xe, !value))
-		return -EINVAL;
-
-	if (XE_IOCTL_DBG(xe, !(vm->flags & XE_VM_FLAG_ASYNC_BIND_OPS)))
-		return -EOPNOTSUPP;
-
-	if (XE_IOCTL_DBG(xe, vm->async_ops.error_capture.addr))
-		return -EOPNOTSUPP;
-
-	vm->async_ops.error_capture.mm = current->mm;
-	vm->async_ops.error_capture.addr = value;
-	init_waitqueue_head(&vm->async_ops.error_capture.wq);
-
-	return 0;
-}
-
-typedef int (*xe_vm_set_property_fn)(struct xe_device *xe, struct xe_vm *vm,
-				     u64 value);
-
-static const xe_vm_set_property_fn vm_set_property_funcs[] = {
-	[XE_VM_PROPERTY_BIND_OP_ERROR_CAPTURE_ADDRESS] =
-		vm_set_error_capture_address,
-};
-
-static int vm_user_ext_set_property(struct xe_device *xe, struct xe_vm *vm,
-				    u64 extension)
-{
-	u64 __user *address = u64_to_user_ptr(extension);
-	struct drm_xe_ext_set_property ext;
-	int err;
-
-	err = __copy_from_user(&ext, address, sizeof(ext));
-	if (XE_IOCTL_DBG(xe, err))
-		return -EFAULT;
-
-	if (XE_IOCTL_DBG(xe, ext.property >=
-			 ARRAY_SIZE(vm_set_property_funcs)) ||
-	    XE_IOCTL_DBG(xe, ext.pad) ||
-	    XE_IOCTL_DBG(xe, ext.reserved[0] || ext.reserved[1]))
-		return -EINVAL;
-
-	return vm_set_property_funcs[ext.property](xe, vm, ext.value);
-}
-
-typedef int (*xe_vm_user_extension_fn)(struct xe_device *xe, struct xe_vm *vm,
-				       u64 extension);
-
-static const xe_vm_set_property_fn vm_user_extension_funcs[] = {
-	[XE_VM_EXTENSION_SET_PROPERTY] = vm_user_ext_set_property,
-};
-
-#define MAX_USER_EXTENSIONS	16
-static int vm_user_extensions(struct xe_device *xe, struct xe_vm *vm,
-			      u64 extensions, int ext_number)
-{
-	u64 __user *address = u64_to_user_ptr(extensions);
-	struct xe_user_extension ext;
-	int err;
-
-	if (XE_IOCTL_DBG(xe, ext_number >= MAX_USER_EXTENSIONS))
-		return -E2BIG;
-
-	err = __copy_from_user(&ext, address, sizeof(ext));
-	if (XE_IOCTL_DBG(xe, err))
-		return -EFAULT;
-
-	if (XE_IOCTL_DBG(xe, ext.pad) ||
-	    XE_IOCTL_DBG(xe, ext.name >=
-			 ARRAY_SIZE(vm_user_extension_funcs)))
-		return -EINVAL;
-
-	err = vm_user_extension_funcs[ext.name](xe, vm, extensions);
-	if (XE_IOCTL_DBG(xe, err))
-		return err;
-
-	if (ext.next_extension)
-		return vm_user_extensions(xe, vm, ext.next_extension,
-					  ++ext_number);
-
-	return 0;
-}
-
 #define ALL_DRM_XE_VM_CREATE_FLAGS (DRM_XE_VM_CREATE_SCRATCH_PAGE | \
 				    DRM_XE_VM_CREATE_COMPUTE_MODE | \
 				    DRM_XE_VM_CREATE_ASYNC_BIND_OPS | \
@@ -2138,6 +2022,9 @@ int xe_vm_create_ioctl(struct drm_device *dev, void *data,
 	int err;
 	u32 flags = 0;
 
+	if (XE_IOCTL_DBG(xe, args->extensions))
+		return -EINVAL;
+
 	if (XE_WA(xe_root_mmio_gt(xe), 14016763929))
 		args->flags |= DRM_XE_VM_CREATE_SCRATCH_PAGE;
 
@@ -2180,14 +2067,6 @@ int xe_vm_create_ioctl(struct drm_device *dev, void *data,
 	if (IS_ERR(vm))
 		return PTR_ERR(vm);
 
-	if (args->extensions) {
-		err = vm_user_extensions(xe, vm, args->extensions, 0);
-		if (XE_IOCTL_DBG(xe, err)) {
-			xe_vm_close_and_put(vm);
-			return err;
-		}
-	}
-
 	mutex_lock(&xef->vm.lock);
 	err = xa_alloc(&xef->vm.xa, &id, vm, xa_limit_32b, GFP_KERNEL);
 	mutex_unlock(&xef->vm.lock);
@@ -3087,8 +2966,6 @@ static void xe_vma_op_work_func(struct work_struct *w)
 				vm_set_async_error(vm, err);
 				up_write(&vm->lock);
 
-				if (vm->async_ops.error_capture.addr)
-					vm_error_capture(vm, err, 0, 0, 0);
 				break;
 			}
 			up_write(&vm->lock);

include/uapi/drm/xe_drm.h

@@ -552,23 +552,6 @@ struct drm_xe_gem_mmap_offset {
 	__u64 reserved[2];
 };
 
-/**
- * struct drm_xe_vm_bind_op_error_capture - format of VM bind op error capture
- */
-struct drm_xe_vm_bind_op_error_capture {
-	/** @error: errno that occurred */
-	__s32 error;
-
-	/** @op: operation that encounter an error */
-	__u32 op;
-
-	/** @addr: address of bind op */
-	__u64 addr;
-
-	/** @size: size of bind */
-	__u64 size;
-};
-
 /** struct drm_xe_ext_set_property - XE set property extension */
 struct drm_xe_ext_set_property {
 	/** @base: base user extension */
@@ -589,7 +572,6 @@ struct drm_xe_ext_set_property {
 
 struct drm_xe_vm_create {
 #define XE_VM_EXTENSION_SET_PROPERTY	0
-#define XE_VM_PROPERTY_BIND_OP_ERROR_CAPTURE_ADDRESS		0
 	/** @extensions: Pointer to the first extension struct, if any */
 	__u64 extensions;
 
@@ -674,10 +656,7 @@ struct drm_xe_vm_bind_op {
 	 * practice the bind op is good and will complete.
 	 *
 	 * If this flag is set and doesn't return an error, the bind op can
-	 * still fail and recovery is needed. If configured, the bind op that
-	 * caused the error will be captured in drm_xe_vm_bind_op_error_capture.
-	 * Once the user sees the error (via a ufence +
-	 * XE_VM_PROPERTY_BIND_OP_ERROR_CAPTURE_ADDRESS), it should free memory
+	 * still fail and recovery is needed. It should free memory
 	 * via non-async unbinds, and then restart all queued async binds op via
 	 * XE_VM_BIND_OP_RESTART. Or alternatively the user should destroy the
 	 * VM.