drm/xe: Convert existing drm_exec transactions for exhaustive eviction

Convert existing drm_exec transactions, like GT pagefault validation,
non-LR exec() IOCTL and the rebind worker to support
exhaustive eviction using the xe_validation_guard().

v2:
- Adapt to signature change in xe_validation_guard() (Matt Brost)
- Avoid gotos from within xe_validation_guard() (Matt Brost)
- Check error return from xe_validation_guard()

v3:
- Rebase on gpu_madvise()

Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com> #v1
Link: https://lore.kernel.org/r/20250908101246.65025-6-thomas.hellstrom@linux.intel.com

1 files changed, 8 insertions, 12 deletions

diff --git a/drivers/gpu/drm/xe/xe_exec.c b/drivers/gpu/drm/xe/xe_exec.c
index 56edee596352..7715e74bb945 100644
--- a/drivers/gpu/drm/xe/xe_exec.c
+++ b/drivers/gpu/drm/xe/xe_exec.c
@@ -120,10 +120,10 @@ int xe_exec_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
 	struct drm_gpuvm_exec vm_exec = {.extra.fn = xe_exec_fn};
 	struct drm_exec *exec = &vm_exec.exec;
 	u32 i, num_syncs, num_ufence = 0;
+	struct xe_validation_ctx ctx;
 	struct xe_sched_job *job;
 	struct xe_vm *vm;
 	bool write_locked, skip_retry = false;
-	ktime_t end = 0;
 	int err = 0;
 	struct xe_hw_engine_group *group;
 	enum xe_hw_engine_group_execution_mode mode, previous_mode;
@@ -251,17 +251,12 @@ retry:
 	if (err)
 		goto err_unlock_list;
 
-	vm_exec.vm = &vm->gpuvm;
-	vm_exec.flags = DRM_EXEC_INTERRUPTIBLE_WAIT;
-	if (xe_vm_in_lr_mode(vm)) {
-		drm_exec_init(exec, vm_exec.flags, 0);
-	} else {
-		err = drm_gpuvm_exec_lock(&vm_exec);
-		if (err) {
-			if (xe_vm_validate_should_retry(exec, err, &end))
-				err = -EAGAIN;
+	if (!xe_vm_in_lr_mode(vm)) {
+		vm_exec.vm = &vm->gpuvm;
+		vm_exec.flags = DRM_EXEC_INTERRUPTIBLE_WAIT;
+		err = xe_validation_exec_lock(&ctx, &vm_exec, &xe->val);
+		if (err)
 			goto err_unlock_list;
-		}
 	}
 
 	if (xe_vm_is_closed_or_banned(q->vm)) {
@@ -355,7 +350,8 @@ err_put_job:
 	if (err)
 		xe_sched_job_put(job);
 err_exec:
-	drm_exec_fini(exec);
+	if (!xe_vm_in_lr_mode(vm))
+		xe_validation_ctx_fini(&ctx);
 err_unlock_list:
 	up_read(&vm->lock);
 	if (err == -EAGAIN && !skip_retry)