1235368Sgnn// 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 <asm/vas.h>
13#include "vas.h"
14
15static struct dentry *vas_debugfs;
16
17static char *cop_to_str(int cop)
18{
19	switch (cop) {
20	case VAS_COP_TYPE_FAULT:	return "Fault";
21	case VAS_COP_TYPE_842:		return "NX-842 Normal Priority";
22	case VAS_COP_TYPE_842_HIPRI:	return "NX-842 High Priority";
23	case VAS_COP_TYPE_GZIP:		return "NX-GZIP Normal Priority";
24	case VAS_COP_TYPE_GZIP_HIPRI:	return "NX-GZIP High Priority";
25	case VAS_COP_TYPE_FTW:		return "Fast Thread-wakeup";
26	default:			return "Unknown";
27	}
28}
29
30static int info_show(struct seq_file *s, void *private)
31{
32	struct pnv_vas_window *window = s->private;
33
34	mutex_lock(&vas_mutex);
35
36	/* ensure window is not unmapped */
37	if (!window->hvwc_map)
38		goto unlock;
39
40	seq_printf(s, "Type: %s, %s\n", cop_to_str(window->vas_win.cop),
41					window->tx_win ? "Send" : "Receive");
42	seq_printf(s, "Pid : %d\n", vas_window_pid(&window->vas_win));
43
44unlock:
45	mutex_unlock(&vas_mutex);
46	return 0;
47}
48
49DEFINE_SHOW_ATTRIBUTE(info);
50
51static inline void print_reg(struct seq_file *s, struct pnv_vas_window *win,
52			char *name, u32 reg)
53{
54	seq_printf(s, "0x%016llx %s\n", read_hvwc_reg(win, name, reg), name);
55}
56
57static int hvwc_show(struct seq_file *s, void *private)
58{
59	struct pnv_vas_window *window = s->private;
60
61	mutex_lock(&vas_mutex);
62
63	/* ensure window is not unmapped */
64	if (!window->hvwc_map)
65		goto unlock;
66
67	print_reg(s, window, VREG(LPID));
68	print_reg(s, window, VREG(PID));
69	print_reg(s, window, VREG(XLATE_MSR));
70	print_reg(s, window, VREG(XLATE_LPCR));
71	print_reg(s, window, VREG(XLATE_CTL));
72	print_reg(s, window, VREG(AMR));
73	print_reg(s, window, VREG(SEIDR));
74	print_reg(s, window, VREG(FAULT_TX_WIN));
75	print_reg(s, window, VREG(OSU_INTR_SRC_RA));
76	print_reg(s, window, VREG(HV_INTR_SRC_RA));
77	print_reg(s, window, VREG(PSWID));
78	print_reg(s, window, VREG(LFIFO_BAR));
79	print_reg(s, window, VREG(LDATA_STAMP_CTL));
80	print_reg(s, window, VREG(LDMA_CACHE_CTL));
81	print_reg(s, window, VREG(LRFIFO_PUSH));
82	print_reg(s, window, VREG(CURR_MSG_COUNT));
83	print_reg(s, window, VREG(LNOTIFY_AFTER_COUNT));
84	print_reg(s, window, VREG(LRX_WCRED));
85	print_reg(s, window, VREG(LRX_WCRED_ADDER));
86	print_reg(s, window, VREG(TX_WCRED));
87	print_reg(s, window, VREG(TX_WCRED_ADDER));
88	print_reg(s, window, VREG(LFIFO_SIZE));
89	print_reg(s, window, VREG(WINCTL));
90	print_reg(s, window, VREG(WIN_STATUS));
91	print_reg(s, window, VREG(WIN_CTX_CACHING_CTL));
92	print_reg(s, window, VREG(TX_RSVD_BUF_COUNT));
93	print_reg(s, window, VREG(LRFIFO_WIN_PTR));
94	print_reg(s, window, VREG(LNOTIFY_CTL));
95	print_reg(s, window, VREG(LNOTIFY_PID));
96	print_reg(s, window, VREG(LNOTIFY_LPID));
97	print_reg(s, window, VREG(LNOTIFY_TID));
98	print_reg(s, window, VREG(LNOTIFY_SCOPE));
99	print_reg(s, window, VREG(NX_UTIL_ADDER));
100unlock:
101	mutex_unlock(&vas_mutex);
102	return 0;
103}
104
105DEFINE_SHOW_ATTRIBUTE(hvwc);
106
107void vas_window_free_dbgdir(struct pnv_vas_window *pnv_win)
108{
109	struct vas_window *window =  &pnv_win->vas_win;
110
111	if (window->dbgdir) {
112		debugfs_remove_recursive(window->dbgdir);
113		kfree(window->dbgname);
114		window->dbgdir = NULL;
115		window->dbgname = NULL;
116	}
117}
118
119void vas_window_init_dbgdir(struct pnv_vas_window *window)
120{
121	struct dentry *d;
122
123	if (!window->vinst->dbgdir)
124		return;
125
126	window->vas_win.dbgname = kzalloc(16, GFP_KERNEL);
127	if (!window->vas_win.dbgname)
128		return;
129
130	snprintf(window->vas_win.dbgname, 16, "w%d", window->vas_win.winid);
131
132	d = debugfs_create_dir(window->vas_win.dbgname, window->vinst->dbgdir);
133	window->vas_win.dbgdir = d;
134
135	debugfs_create_file("info", 0444, d, window, &info_fops);
136	debugfs_create_file("hvwc", 0444, d, window, &hvwc_fops);
137}
138
139void vas_instance_init_dbgdir(struct vas_instance *vinst)
140{
141	struct dentry *d;
142
143	vas_init_dbgdir();
144
145	vinst->dbgname = kzalloc(16, GFP_KERNEL);
146	if (!vinst->dbgname)
147		return;
148
149	snprintf(vinst->dbgname, 16, "v%d", vinst->vas_id);
150
151	d = debugfs_create_dir(vinst->dbgname, vas_debugfs);
152	vinst->dbgdir = d;
153}
154
155/*
156 * Set up the "root" VAS debugfs dir. Return if we already set it up
157 * (or failed to) in an earlier instance of VAS.
158 */
159void vas_init_dbgdir(void)
160{
161	static bool first_time = true;
162
163	if (!first_time)
164		return;
165
166	first_time = false;
167	vas_debugfs = debugfs_create_dir("vas", NULL);
168}
169