1// SPDX-License-Identifier: MIT
  2/*
  3 * Copyright © 2019 Intel Corporation
  4 */
  5
  6#include <linux/debugfs.h>
  7
  8#include "i915_drv.h"
  9#include "intel_gt.h"
 10#include "intel_gt_debugfs.h"
 11#include "intel_gt_engines_debugfs.h"
 12#include "intel_gt_mcr.h"
 13#include "intel_gt_pm_debugfs.h"
 14#include "intel_sseu_debugfs.h"
 15#include "pxp/intel_pxp_debugfs.h"
 16#include "uc/intel_uc_debugfs.h"
 17
 18int intel_gt_debugfs_reset_show(struct intel_gt *gt, u64 *val)
 19{
 20	int ret = intel_gt_terminally_wedged(gt);
 21
 22	switch (ret) {
 23	case -EIO:
 24		*val = 1;
 25		return 0;
 26	case 0:
 27		*val = 0;
 28		return 0;
 29	default:
 30		return ret;
 31	}
 32}
 33
 34void intel_gt_debugfs_reset_store(struct intel_gt *gt, u64 val)
 35{
 36	/* Flush any previous reset before applying for a new one */
 37	wait_event(gt->reset.queue,
 38		   !test_bit(I915_RESET_BACKOFF, &gt->reset.flags));
 39
 40	intel_gt_handle_error(gt, val, I915_ERROR_CAPTURE,
 41			      "Manually reset engine mask to %llx", val);
 42}
 43
 44/*
 45 * keep the interface clean where the first parameter
 46 * is a 'struct intel_gt *' instead of 'void *'
 47 */
 48static int __intel_gt_debugfs_reset_show(void *data, u64 *val)
 49{
 50	return intel_gt_debugfs_reset_show(data, val);
 51}
 52
 53static int __intel_gt_debugfs_reset_store(void *data, u64 val)
 54{
 55	intel_gt_debugfs_reset_store(data, val);
 56
 57	return 0;
 58}
 59
 60DEFINE_SIMPLE_ATTRIBUTE(reset_fops, __intel_gt_debugfs_reset_show,
 61			__intel_gt_debugfs_reset_store, "%llu\n");
 62
 63static int steering_show(struct seq_file *m, void *data)
 64{
 65	struct drm_printer p = drm_seq_file_printer(m);
 66	struct intel_gt *gt = m->private;
 67
 68	intel_gt_mcr_report_steering(&p, gt, true);
 69
 70	return 0;
 71}
 72DEFINE_INTEL_GT_DEBUGFS_ATTRIBUTE(steering);
 73
 74static void gt_debugfs_register(struct intel_gt *gt, struct dentry *root)
 75{
 76	static const struct intel_gt_debugfs_file files[] = {
 77		{ "reset", &reset_fops, NULL },
 78		{ "steering", &steering_fops },
 79	};
 80
 81	intel_gt_debugfs_register_files(root, files, ARRAY_SIZE(files), gt);
 82}
 83
 84void intel_gt_debugfs_register(struct intel_gt *gt)
 85{
 86	struct dentry *root;
 87
 88	if (!gt->i915->drm.primary->debugfs_root)
 89		return;
 90
 91	root = debugfs_create_dir("gt", gt->i915->drm.primary->debugfs_root);
 92	if (IS_ERR(root))
 93		return;
 94
 95	gt_debugfs_register(gt, root);
 96
 97	intel_gt_engines_debugfs_register(gt, root);
 98	intel_gt_pm_debugfs_register(gt, root);
 99	intel_sseu_debugfs_register(gt, root);
100
101	intel_uc_debugfs_register(&gt->uc, root);
102	intel_pxp_debugfs_register(&gt->pxp, root);
103}
104
105void intel_gt_debugfs_register_files(struct dentry *root,
106				     const struct intel_gt_debugfs_file *files,
107				     unsigned long count, void *data)
108{
109	while (count--) {
110		umode_t mode = files->fops->write ? 0644 : 0444;
111
112		if (!files->eval || files->eval(data))
113			debugfs_create_file(files->name,
114					    mode, root, data,
115					    files->fops);
116
117		files++;
118	}
119}