1 files changed, 129 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xe/xe_pxp_debugfs.c b/drivers/gpu/drm/xe/xe_pxp_debugfs.c
new file mode 100644
index 000000000000..525a2f6bb076
--- /dev/null
+++ b/drivers/gpu/drm/xe/xe_pxp_debugfs.c
@@ -0,0 +1,129 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2024 Intel Corporation
+ */
+
+#include "xe_pxp_debugfs.h"
+
+#include <linux/debugfs.h>
+
+#include <drm/drm_debugfs.h>
+#include <drm/drm_managed.h>
+#include <drm/drm_print.h>
+
+#include "xe_device.h"
+#include "xe_pxp.h"
+#include "xe_pxp_types.h"
+#include "regs/xe_irq_regs.h"
+
+static struct xe_pxp *node_to_pxp(struct drm_info_node *node)
+{
+	return node->info_ent->data;
+}
+
+static const char *pxp_status_to_str(struct xe_pxp *pxp)
+{
+	lockdep_assert_held(&pxp->mutex);
+
+	switch (pxp->status) {
+	case XE_PXP_ERROR:
+		return "error";
+	case XE_PXP_NEEDS_TERMINATION:
+		return "needs termination";
+	case XE_PXP_TERMINATION_IN_PROGRESS:
+		return "termination in progress";
+	case XE_PXP_READY_TO_START:
+		return "ready to start";
+	case XE_PXP_ACTIVE:
+		return "active";
+	case XE_PXP_SUSPENDED:
+		return "suspended";
+	default:
+		return "unknown";
+	}
+};
+
+static int pxp_info(struct seq_file *m, void *data)
+{
+	struct xe_pxp *pxp = node_to_pxp(m->private);
+	struct drm_printer p = drm_seq_file_printer(m);
+	const char *status;
+
+	if (!xe_pxp_is_enabled(pxp))
+		return -ENODEV;
+
+	mutex_lock(&pxp->mutex);
+	status = pxp_status_to_str(pxp);
+
+	drm_printf(&p, "status: %s\n", status);
+	drm_printf(&p, "instance counter: %u\n", pxp->key_instance);
+	mutex_unlock(&pxp->mutex);
+
+	return 0;
+}
+
+static int pxp_terminate(struct seq_file *m, void *data)
+{
+	struct xe_pxp *pxp = node_to_pxp(m->private);
+	struct drm_printer p = drm_seq_file_printer(m);
+	int ready = xe_pxp_get_readiness_status(pxp);
+
+	if (ready < 0)
+		return ready; /* disabled or error occurred */
+	else if (!ready)
+		return -EBUSY; /* init still in progress */
+
+	/* no need for a termination if PXP is not active */
+	if (pxp->status != XE_PXP_ACTIVE) {
+		drm_printf(&p, "PXP not active\n");
+		return 0;
+	}
+
+	/* simulate a termination interrupt */
+	spin_lock_irq(&pxp->xe->irq.lock);
+	xe_pxp_irq_handler(pxp->xe, KCR_PXP_STATE_TERMINATED_INTERRUPT);
+	spin_unlock_irq(&pxp->xe->irq.lock);
+
+	drm_printf(&p, "PXP termination queued\n");
+
+	return 0;
+}
+
+static const struct drm_info_list debugfs_list[] = {
+	{"info", pxp_info, 0},
+	{"terminate", pxp_terminate, 0},
+};
+
+void xe_pxp_debugfs_register(struct xe_pxp *pxp)
+{
+	struct drm_minor *minor;
+	struct drm_info_list *local;
+	struct dentry *root;
+	int i;
+
+	if (!xe_pxp_is_enabled(pxp))
+		return;
+
+	minor = pxp->xe->drm.primary;
+	if (!minor->debugfs_root)
+		return;
+
+#define DEBUGFS_SIZE	(ARRAY_SIZE(debugfs_list) * sizeof(struct drm_info_list))
+	local = drmm_kmalloc(&pxp->xe->drm, DEBUGFS_SIZE, GFP_KERNEL);
+	if (!local)
+		return;
+
+	memcpy(local, debugfs_list, DEBUGFS_SIZE);
+#undef DEBUGFS_SIZE
+
+	for (i = 0; i < ARRAY_SIZE(debugfs_list); ++i)
+		local[i].data = pxp;
+
+	root = debugfs_create_dir("pxp", minor->debugfs_root);
+	if (IS_ERR(root))
+		return;
+
+	drm_debugfs_create_files(local,
+				 ARRAY_SIZE(debugfs_list),
+				 root, minor);
+}