1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright 2016-17 IBM Corp.
4 */
5
6#define pr_fmt(fmt) "vas: " fmt
7
8#include <linux/types.h>
9#include <linux/slab.h>
10#include <linux/debugfs.h>
11#include <linux/seq_file.h>
12#include "vas.h"
13
14static struct dentry *vas_debugfs;
15
16static char *cop_to_str(int cop)
17{
18	switch (cop) {
19	case VAS_COP_TYPE_FAULT:	return "Fault";
20	case VAS_COP_TYPE_842:		return "NX-842 Normal Priority";
21	case VAS_COP_TYPE_842_HIPRI:	return "NX-842 High Priority";
22	case VAS_COP_TYPE_GZIP:		return "NX-GZIP Normal Priority";
23	case VAS_COP_TYPE_GZIP_HIPRI:	return "NX-GZIP High Priority";
24	case VAS_COP_TYPE_FTW:		return "Fast Thread-wakeup";
25	default:			return "Unknown";
26	}
27}
28
29static int info_show(struct seq_file *s, void *private)
30{
31	struct vas_window *window = s->private;
32
33	mutex_lock(&vas_mutex);
34
35	/* ensure window is not unmapped */
36	if (!window->hvwc_map)
37		goto unlock;
38
39	seq_printf(s, "Type: %s, %s\n", cop_to_str(window->cop),
40					window->tx_win ? "Send" : "Receive");
41	seq_printf(s, "Pid : %d\n", vas_window_pid(window));
42
43unlock:
44	mutex_unlock(&vas_mutex);
45	return 0;
46}
47
48DEFINE_SHOW_ATTRIBUTE(info);
49
50static inline void print_reg(struct seq_file *s, struct vas_window *win,
51			char *name, u32 reg)
52{
53	seq_printf(s, "0x%016llx %s\n", read_hvwc_reg(win, name, reg), name);
54}
55
56static int hvwc_show(struct seq_file *s, void *private)
57{
58	struct vas_window *window = s->private;
59
60	mutex_lock(&vas_mutex);
61
62	/* ensure window is not unmapped */
63	if (!window->hvwc_map)
64		goto unlock;
65
66	print_reg(s, window, VREG(LPID));
67	print_reg(s, window, VREG(PID));
68	print_reg(s, window, VREG(XLATE_MSR));
69	print_reg(s, window, VREG(XLATE_LPCR));
70	print_reg(s, window, VREG(XLATE_CTL));
71	print_reg(s, window, VREG(AMR));
72	print_reg(s, window, VREG(SEIDR));
73	print_reg(s, window, VREG(FAULT_TX_WIN));
74	print_reg(s, window, VREG(OSU_INTR_SRC_RA));
75	print_reg(s, window, VREG(HV_INTR_SRC_RA));
76	print_reg(s, window, VREG(PSWID));
77	print_reg(s, window, VREG(LFIFO_BAR));
78	print_reg(s, window, VREG(LDATA_STAMP_CTL));
79	print_reg(s, window, VREG(LDMA_CACHE_CTL));
80	print_reg(s, window, VREG(LRFIFO_PUSH));
81	print_reg(s, window, VREG(CURR_MSG_COUNT));
82	print_reg(s, window, VREG(LNOTIFY_AFTER_COUNT));
83	print_reg(s, window, VREG(LRX_WCRED));
84	print_reg(s, window, VREG(LRX_WCRED_ADDER));
85	print_reg(s, window, VREG(TX_WCRED));
86	print_reg(s, window, VREG(TX_WCRED_ADDER));
87	print_reg(s, window, VREG(LFIFO_SIZE));
88	print_reg(s, window, VREG(WINCTL));
89	print_reg(s, window, VREG(WIN_STATUS));
90	print_reg(s, window, VREG(WIN_CTX_CACHING_CTL));
91	print_reg(s, window, VREG(TX_RSVD_BUF_COUNT));
92	print_reg(s, window, VREG(LRFIFO_WIN_PTR));
93	print_reg(s, window, VREG(LNOTIFY_CTL));
94	print_reg(s, window, VREG(LNOTIFY_PID));
95	print_reg(s, window, VREG(LNOTIFY_LPID));
96	print_reg(s, window, VREG(LNOTIFY_TID));
97	print_reg(s, window, VREG(LNOTIFY_SCOPE));
98	print_reg(s, window, VREG(NX_UTIL_ADDER));
99unlock:
100	mutex_unlock(&vas_mutex);
101	return 0;
102}
103
104DEFINE_SHOW_ATTRIBUTE(hvwc);
105
106void vas_window_free_dbgdir(struct vas_window *window)
107{
108	if (window->dbgdir) {
109		debugfs_remove_recursive(window->dbgdir);
110		kfree(window->dbgname);
111		window->dbgdir = NULL;
112		window->dbgname = NULL;
113	}
114}
115
116void vas_window_init_dbgdir(struct vas_window *window)
117{
118	struct dentry *d;
119
120	if (!window->vinst->dbgdir)
121		return;
122
123	window->dbgname = kzalloc(16, GFP_KERNEL);
124	if (!window->dbgname)
125		return;
126
127	snprintf(window->dbgname, 16, "w%d", window->winid);
128
129	d = debugfs_create_dir(window->dbgname, window->vinst->dbgdir);
130	window->dbgdir = d;
131
132	debugfs_create_file("info", 0444, d, window, &info_fops);
133	debugfs_create_file("hvwc", 0444, d, window, &hvwc_fops);
134}
135
136void vas_instance_init_dbgdir(struct vas_instance *vinst)
137{
138	struct dentry *d;
139
140	vas_init_dbgdir();
141
142	vinst->dbgname = kzalloc(16, GFP_KERNEL);
143	if (!vinst->dbgname)
144		return;
145
146	snprintf(vinst->dbgname, 16, "v%d", vinst->vas_id);
147
148	d = debugfs_create_dir(vinst->dbgname, vas_debugfs);
149	vinst->dbgdir = d;
150}
151
152/*
153 * Set up the "root" VAS debugfs dir. Return if we already set it up
154 * (or failed to) in an earlier instance of VAS.
155 */
156void vas_init_dbgdir(void)
157{
158	static bool first_time = true;
159
160	if (!first_time)
161		return;
162
163	first_time = false;
164	vas_debugfs = debugfs_create_dir("vas", NULL);
165}
166