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ece4e512 SB |
1 | /* |
2 | * Copyright 2016-17 IBM Corp. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | */ | |
9 | ||
10 | #define pr_fmt(fmt) "vas: " fmt | |
11 | ||
12 | #include <linux/types.h> | |
13 | #include <linux/slab.h> | |
14 | #include <linux/debugfs.h> | |
15 | #include <linux/seq_file.h> | |
16 | #include "vas.h" | |
17 | ||
18 | static struct dentry *vas_debugfs; | |
19 | ||
20 | static char *cop_to_str(int cop) | |
21 | { | |
22 | switch (cop) { | |
23 | case VAS_COP_TYPE_FAULT: return "Fault"; | |
24 | case VAS_COP_TYPE_842: return "NX-842 Normal Priority"; | |
25 | case VAS_COP_TYPE_842_HIPRI: return "NX-842 High Priority"; | |
26 | case VAS_COP_TYPE_GZIP: return "NX-GZIP Normal Priority"; | |
27 | case VAS_COP_TYPE_GZIP_HIPRI: return "NX-GZIP High Priority"; | |
28 | case VAS_COP_TYPE_FTW: return "Fast Thread-wakeup"; | |
29 | default: return "Unknown"; | |
30 | } | |
31 | } | |
32 | ||
33 | static int info_dbg_show(struct seq_file *s, void *private) | |
34 | { | |
35 | struct vas_window *window = s->private; | |
36 | ||
37 | mutex_lock(&vas_mutex); | |
38 | ||
39 | /* ensure window is not unmapped */ | |
40 | if (!window->hvwc_map) | |
41 | goto unlock; | |
42 | ||
43 | seq_printf(s, "Type: %s, %s\n", cop_to_str(window->cop), | |
44 | window->tx_win ? "Send" : "Receive"); | |
45 | seq_printf(s, "Pid : %d\n", window->pid); | |
46 | ||
47 | unlock: | |
48 | mutex_unlock(&vas_mutex); | |
49 | return 0; | |
50 | } | |
51 | ||
52 | static int info_dbg_open(struct inode *inode, struct file *file) | |
53 | { | |
54 | return single_open(file, info_dbg_show, inode->i_private); | |
55 | } | |
56 | ||
57 | static const struct file_operations info_fops = { | |
58 | .open = info_dbg_open, | |
59 | .read = seq_read, | |
60 | .llseek = seq_lseek, | |
61 | .release = single_release, | |
62 | }; | |
63 | ||
64 | static inline void print_reg(struct seq_file *s, struct vas_window *win, | |
65 | char *name, u32 reg) | |
66 | { | |
67 | seq_printf(s, "0x%016llx %s\n", read_hvwc_reg(win, name, reg), name); | |
68 | } | |
69 | ||
70 | static int hvwc_dbg_show(struct seq_file *s, void *private) | |
71 | { | |
72 | struct vas_window *window = s->private; | |
73 | ||
74 | mutex_lock(&vas_mutex); | |
75 | ||
76 | /* ensure window is not unmapped */ | |
77 | if (!window->hvwc_map) | |
78 | goto unlock; | |
79 | ||
80 | print_reg(s, window, VREG(LPID)); | |
81 | print_reg(s, window, VREG(PID)); | |
82 | print_reg(s, window, VREG(XLATE_MSR)); | |
83 | print_reg(s, window, VREG(XLATE_LPCR)); | |
84 | print_reg(s, window, VREG(XLATE_CTL)); | |
85 | print_reg(s, window, VREG(AMR)); | |
86 | print_reg(s, window, VREG(SEIDR)); | |
87 | print_reg(s, window, VREG(FAULT_TX_WIN)); | |
88 | print_reg(s, window, VREG(OSU_INTR_SRC_RA)); | |
89 | print_reg(s, window, VREG(HV_INTR_SRC_RA)); | |
90 | print_reg(s, window, VREG(PSWID)); | |
91 | print_reg(s, window, VREG(LFIFO_BAR)); | |
92 | print_reg(s, window, VREG(LDATA_STAMP_CTL)); | |
93 | print_reg(s, window, VREG(LDMA_CACHE_CTL)); | |
94 | print_reg(s, window, VREG(LRFIFO_PUSH)); | |
95 | print_reg(s, window, VREG(CURR_MSG_COUNT)); | |
96 | print_reg(s, window, VREG(LNOTIFY_AFTER_COUNT)); | |
97 | print_reg(s, window, VREG(LRX_WCRED)); | |
98 | print_reg(s, window, VREG(LRX_WCRED_ADDER)); | |
99 | print_reg(s, window, VREG(TX_WCRED)); | |
100 | print_reg(s, window, VREG(TX_WCRED_ADDER)); | |
101 | print_reg(s, window, VREG(LFIFO_SIZE)); | |
102 | print_reg(s, window, VREG(WINCTL)); | |
103 | print_reg(s, window, VREG(WIN_STATUS)); | |
104 | print_reg(s, window, VREG(WIN_CTX_CACHING_CTL)); | |
105 | print_reg(s, window, VREG(TX_RSVD_BUF_COUNT)); | |
106 | print_reg(s, window, VREG(LRFIFO_WIN_PTR)); | |
107 | print_reg(s, window, VREG(LNOTIFY_CTL)); | |
108 | print_reg(s, window, VREG(LNOTIFY_PID)); | |
109 | print_reg(s, window, VREG(LNOTIFY_LPID)); | |
110 | print_reg(s, window, VREG(LNOTIFY_TID)); | |
111 | print_reg(s, window, VREG(LNOTIFY_SCOPE)); | |
112 | print_reg(s, window, VREG(NX_UTIL_ADDER)); | |
113 | unlock: | |
114 | mutex_unlock(&vas_mutex); | |
115 | return 0; | |
116 | } | |
117 | ||
118 | static int hvwc_dbg_open(struct inode *inode, struct file *file) | |
119 | { | |
120 | return single_open(file, hvwc_dbg_show, inode->i_private); | |
121 | } | |
122 | ||
123 | static const struct file_operations hvwc_fops = { | |
124 | .open = hvwc_dbg_open, | |
125 | .read = seq_read, | |
126 | .llseek = seq_lseek, | |
127 | .release = single_release, | |
128 | }; | |
129 | ||
130 | void vas_window_free_dbgdir(struct vas_window *window) | |
131 | { | |
132 | if (window->dbgdir) { | |
133 | debugfs_remove_recursive(window->dbgdir); | |
134 | kfree(window->dbgname); | |
135 | window->dbgdir = NULL; | |
136 | window->dbgname = NULL; | |
137 | } | |
138 | } | |
139 | ||
140 | void vas_window_init_dbgdir(struct vas_window *window) | |
141 | { | |
142 | struct dentry *f, *d; | |
143 | ||
144 | if (!window->vinst->dbgdir) | |
145 | return; | |
146 | ||
147 | window->dbgname = kzalloc(16, GFP_KERNEL); | |
148 | if (!window->dbgname) | |
149 | return; | |
150 | ||
151 | snprintf(window->dbgname, 16, "w%d", window->winid); | |
152 | ||
153 | d = debugfs_create_dir(window->dbgname, window->vinst->dbgdir); | |
154 | if (IS_ERR(d)) | |
155 | goto free_name; | |
156 | ||
157 | window->dbgdir = d; | |
158 | ||
159 | f = debugfs_create_file("info", 0444, d, window, &info_fops); | |
160 | if (IS_ERR(f)) | |
161 | goto remove_dir; | |
162 | ||
163 | f = debugfs_create_file("hvwc", 0444, d, window, &hvwc_fops); | |
164 | if (IS_ERR(f)) | |
165 | goto remove_dir; | |
166 | ||
167 | return; | |
168 | ||
ece4e512 SB |
169 | remove_dir: |
170 | debugfs_remove_recursive(window->dbgdir); | |
171 | window->dbgdir = NULL; | |
1373cc31 SB |
172 | |
173 | free_name: | |
174 | kfree(window->dbgname); | |
175 | window->dbgname = NULL; | |
ece4e512 SB |
176 | } |
177 | ||
178 | void vas_instance_init_dbgdir(struct vas_instance *vinst) | |
179 | { | |
180 | struct dentry *d; | |
181 | ||
45ddea8a | 182 | vas_init_dbgdir(); |
ece4e512 SB |
183 | if (!vas_debugfs) |
184 | return; | |
185 | ||
186 | vinst->dbgname = kzalloc(16, GFP_KERNEL); | |
187 | if (!vinst->dbgname) | |
188 | return; | |
189 | ||
190 | snprintf(vinst->dbgname, 16, "v%d", vinst->vas_id); | |
191 | ||
192 | d = debugfs_create_dir(vinst->dbgname, vas_debugfs); | |
193 | if (IS_ERR(d)) | |
194 | goto free_name; | |
195 | ||
196 | vinst->dbgdir = d; | |
197 | return; | |
198 | ||
199 | free_name: | |
200 | kfree(vinst->dbgname); | |
201 | vinst->dbgname = NULL; | |
202 | vinst->dbgdir = NULL; | |
203 | } | |
204 | ||
45ddea8a SB |
205 | /* |
206 | * Set up the "root" VAS debugfs dir. Return if we already set it up | |
207 | * (or failed to) in an earlier instance of VAS. | |
208 | */ | |
ece4e512 SB |
209 | void vas_init_dbgdir(void) |
210 | { | |
45ddea8a SB |
211 | static bool first_time = true; |
212 | ||
213 | if (!first_time) | |
214 | return; | |
215 | ||
216 | first_time = false; | |
ece4e512 SB |
217 | vas_debugfs = debugfs_create_dir("vas", NULL); |
218 | if (IS_ERR(vas_debugfs)) | |
219 | vas_debugfs = NULL; | |
220 | } |