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 <asm/vas.h>
13 #include "vas.h"
14
15 static struct dentry *vas_debugfs;
16
cop_to_str(int cop)17 static 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
info_show(struct seq_file * s,void * private)30 static 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
44 unlock:
45 mutex_unlock(&vas_mutex);
46 return 0;
47 }
48
49 DEFINE_SHOW_ATTRIBUTE(info);
50
print_reg(struct seq_file * s,struct pnv_vas_window * win,char * name,u32 reg)51 static 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
hvwc_show(struct seq_file * s,void * private)57 static 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));
100 unlock:
101 mutex_unlock(&vas_mutex);
102 return 0;
103 }
104
105 DEFINE_SHOW_ATTRIBUTE(hvwc);
106
vas_window_free_dbgdir(struct pnv_vas_window * pnv_win)107 void 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
vas_window_init_dbgdir(struct pnv_vas_window * window)119 void 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
vas_instance_init_dbgdir(struct vas_instance * vinst)139 void 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 */
vas_init_dbgdir(void)159 void 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