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 | |
21 | static 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 | |
37 | DEFINE_SHOW_ATTRIBUTE(pxp_info); |
38 | |
39 | static int pxp_terminate_get(void *data, u64 *val) |
40 | { |
41 | /* nothing to read */ |
42 | return -EPERM; |
43 | } |
44 | |
45 | static 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 | |
68 | DEFINE_SIMPLE_ATTRIBUTE(pxp_terminate_fops, pxp_terminate_get, pxp_terminate_set, "%llx\n" ); |
69 | |
70 | void intel_pxp_debugfs_register(struct intel_pxp *pxp) |
71 | { |
72 | struct drm_minor *minor; |
73 | struct dentry *pxproot; |
74 | |
75 | if (!intel_pxp_is_supported(pxp)) |
76 | return; |
77 | |
78 | minor = pxp->ctrl_gt->i915->drm.primary; |
79 | if (!minor->debugfs_root) |
80 | return; |
81 | |
82 | pxproot = debugfs_create_dir(name: "pxp" , parent: minor->debugfs_root); |
83 | if (IS_ERR(ptr: pxproot)) |
84 | return; |
85 | |
86 | debugfs_create_file(name: "info" , mode: 0444, parent: pxproot, |
87 | data: pxp, fops: &pxp_info_fops); |
88 | |
89 | debugfs_create_file(name: "terminate_state" , mode: 0644, parent: pxproot, |
90 | data: pxp, fops: &pxp_terminate_fops); |
91 | } |
92 | |