1// SPDX-License-Identifier: MIT
2/*
3 * Copyright © 2021 Intel Corporation
4 */
5
6#include <linux/debugfs.h>
7#include <linux/string_helpers.h>
8
9#include <drm/drm_print.h>
10
11#include "gt/intel_gt_debugfs.h"
12
13#include "i915_drv.h"
14
15#include "intel_pxp.h"
16#include "intel_pxp_debugfs.h"
17#include "intel_pxp_gsccs.h"
18#include "intel_pxp_irq.h"
19#include "intel_pxp_types.h"
20
21static int pxp_info_show(struct seq_file *m, void *data)
22{
23 struct intel_pxp *pxp = m->private;
24 struct drm_printer p = drm_seq_file_printer(f: m);
25
26 if (!intel_pxp_is_enabled(pxp)) {
27 drm_printf(p: &p, f: "pxp disabled\n");
28 return 0;
29 }
30
31 drm_printf(p: &p, f: "active: %s\n", str_yes_no(v: intel_pxp_is_active(pxp)));
32 drm_printf(p: &p, f: "instance counter: %u\n", pxp->key_instance);
33
34 return 0;
35}
36
37DEFINE_SHOW_ATTRIBUTE(pxp_info);
38
39static int pxp_terminate_get(void *data, u64 *val)
40{
41 /* nothing to read */
42 return -EPERM;
43}
44
45static int pxp_terminate_set(void *data, u64 val)
46{
47 struct intel_pxp *pxp = data;
48 struct intel_gt *gt = pxp->ctrl_gt;
49 int timeout_ms;
50
51 if (!intel_pxp_is_active(pxp))
52 return -ENODEV;
53
54 /* simulate a termination interrupt */
55 spin_lock_irq(lock: gt->irq_lock);
56 intel_pxp_irq_handler(pxp, GEN12_DISPLAY_PXP_STATE_TERMINATED_INTERRUPT);
57 spin_unlock_irq(lock: gt->irq_lock);
58
59 timeout_ms = intel_pxp_get_backend_timeout_ms(pxp);
60
61 if (!wait_for_completion_timeout(x: &pxp->termination,
62 timeout: msecs_to_jiffies(m: timeout_ms)))
63 return -ETIMEDOUT;
64
65 return 0;
66}
67
68DEFINE_SIMPLE_ATTRIBUTE(pxp_terminate_fops, pxp_terminate_get, pxp_terminate_set, "%llx\n");
69
70void intel_pxp_debugfs_register(struct intel_pxp *pxp)
71{
72 struct dentry *debugfs_root;
73 struct dentry *pxproot;
74
75 if (!intel_pxp_is_supported(pxp))
76 return;
77
78 debugfs_root = pxp->ctrl_gt->i915->drm.debugfs_root;
79 if (!debugfs_root)
80 return;
81
82 pxproot = debugfs_create_dir(name: "pxp", parent: debugfs_root);
83 if (IS_ERR(ptr: pxproot))
84 return;
85
86 debugfs_create_file("info", 0444, pxproot,
87 pxp, &pxp_info_fops);
88
89 debugfs_create_file("terminate_state", 0644, pxproot,
90 pxp, &pxp_terminate_fops);
91}
92

source code of linux/drivers/gpu/drm/i915/pxp/intel_pxp_debugfs.c