1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
|
/*
* AMD Cryptographic Coprocessor (CCP) driver
*
* Copyright (C) 2017 Advanced Micro Devices, Inc.
*
* Author: Gary R Hook <gary.hook@amd.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/debugfs.h>
#include <linux/ccp.h>
#include "ccp-dev.h"
/* DebugFS helpers */
#define OBUFP (obuf + oboff)
#define OBUFLEN 512
#define OBUFSPC (OBUFLEN - oboff)
#define OSCNPRINTF(fmt, ...) \
scnprintf(OBUFP, OBUFSPC, fmt, ## __VA_ARGS__)
#define BUFLEN 63
#define RI_VERSION_NUM 0x0000003F
#define RI_AES_PRESENT 0x00000040
#define RI_3DES_PRESENT 0x00000080
#define RI_SHA_PRESENT 0x00000100
#define RI_RSA_PRESENT 0x00000200
#define RI_ECC_PRESENT 0x00000400
#define RI_ZDE_PRESENT 0x00000800
#define RI_ZCE_PRESENT 0x00001000
#define RI_TRNG_PRESENT 0x00002000
#define RI_ELFC_PRESENT 0x00004000
#define RI_ELFC_SHIFT 14
#define RI_NUM_VQM 0x00078000
#define RI_NVQM_SHIFT 15
#define RI_NVQM(r) (((r) * RI_NUM_VQM) >> RI_NVQM_SHIFT)
#define RI_LSB_ENTRIES 0x0FF80000
#define RI_NLSB_SHIFT 19
#define RI_NLSB(r) (((r) * RI_LSB_ENTRIES) >> RI_NLSB_SHIFT)
static ssize_t ccp5_debugfs_info_read(struct file *filp, char __user *ubuf,
size_t count, loff_t *offp)
{
struct ccp_device *ccp = filp->private_data;
unsigned int oboff = 0;
unsigned int regval;
ssize_t ret;
char *obuf;
if (!ccp)
return 0;
obuf = kmalloc(OBUFLEN, GFP_KERNEL);
if (!obuf)
return -ENOMEM;
oboff += OSCNPRINTF("Device name: %s\n", ccp->name);
oboff += OSCNPRINTF(" RNG name: %s\n", ccp->rngname);
oboff += OSCNPRINTF(" # Queues: %d\n", ccp->cmd_q_count);
oboff += OSCNPRINTF(" # Cmds: %d\n", ccp->cmd_count);
regval = ioread32(ccp->io_regs + CMD5_PSP_CCP_VERSION);
oboff += OSCNPRINTF(" Version: %d\n", regval & RI_VERSION_NUM);
oboff += OSCNPRINTF(" Engines:");
if (regval & RI_AES_PRESENT)
oboff += OSCNPRINTF(" AES");
if (regval & RI_3DES_PRESENT)
oboff += OSCNPRINTF(" 3DES");
if (regval & RI_SHA_PRESENT)
oboff += OSCNPRINTF(" SHA");
if (regval & RI_RSA_PRESENT)
oboff += OSCNPRINTF(" RSA");
if (regval & RI_ECC_PRESENT)
oboff += OSCNPRINTF(" ECC");
if (regval & RI_ZDE_PRESENT)
oboff += OSCNPRINTF(" ZDE");
if (regval & RI_ZCE_PRESENT)
oboff += OSCNPRINTF(" ZCE");
if (regval & RI_TRNG_PRESENT)
oboff += OSCNPRINTF(" TRNG");
oboff += OSCNPRINTF("\n");
oboff += OSCNPRINTF(" Queues: %d\n",
(regval & RI_NUM_VQM) >> RI_NVQM_SHIFT);
oboff += OSCNPRINTF("LSB Entries: %d\n",
(regval & RI_LSB_ENTRIES) >> RI_NLSB_SHIFT);
ret = simple_read_from_buffer(ubuf, count, offp, obuf, oboff);
kfree(obuf);
return ret;
}
/* Return a formatted buffer containing the current
* statistics across all queues for a CCP.
*/
static ssize_t ccp5_debugfs_stats_read(struct file *filp, char __user *ubuf,
size_t count, loff_t *offp)
{
struct ccp_device *ccp = filp->private_data;
unsigned long total_xts_aes_ops = 0;
unsigned long total_3des_ops = 0;
unsigned long total_aes_ops = 0;
unsigned long total_sha_ops = 0;
unsigned long total_rsa_ops = 0;
unsigned long total_ecc_ops = 0;
unsigned long total_pt_ops = 0;
unsigned long total_ops = 0;
unsigned int oboff = 0;
ssize_t ret = 0;
unsigned int i;
char *obuf;
for (i = 0; i < ccp->cmd_q_count; i++) {
struct ccp_cmd_queue *cmd_q = &ccp->cmd_q[i];
total_ops += cmd_q->total_ops;
total_aes_ops += cmd_q->total_aes_ops;
total_xts_aes_ops += cmd_q->total_xts_aes_ops;
total_3des_ops += cmd_q->total_3des_ops;
total_sha_ops += cmd_q->total_sha_ops;
total_rsa_ops += cmd_q->total_rsa_ops;
total_pt_ops += cmd_q->total_pt_ops;
total_ecc_ops += cmd_q->total_ecc_ops;
}
obuf = kmalloc(OBUFLEN, GFP_KERNEL);
if (!obuf)
return -ENOMEM;
oboff += OSCNPRINTF("Total Interrupts Handled: %ld\n",
ccp->total_interrupts);
oboff += OSCNPRINTF(" Total Operations: %ld\n",
total_ops);
oboff += OSCNPRINTF(" AES: %ld\n",
total_aes_ops);
oboff += OSCNPRINTF(" XTS AES: %ld\n",
total_xts_aes_ops);
oboff += OSCNPRINTF(" SHA: %ld\n",
total_3des_ops);
oboff += OSCNPRINTF(" SHA: %ld\n",
total_sha_ops);
oboff += OSCNPRINTF(" RSA: %ld\n",
total_rsa_ops);
oboff += OSCNPRINTF(" Pass-Thru: %ld\n",
total_pt_ops);
oboff += OSCNPRINTF(" ECC: %ld\n",
total_ecc_ops);
ret = simple_read_from_buffer(ubuf, count, offp, obuf, oboff);
kfree(obuf);
return ret;
}
/* Reset the counters in a queue
*/
static void ccp5_debugfs_reset_queue_stats(struct ccp_cmd_queue *cmd_q)
{
cmd_q->total_ops = 0L;
cmd_q->total_aes_ops = 0L;
cmd_q->total_xts_aes_ops = 0L;
cmd_q->total_3des_ops = 0L;
cmd_q->total_sha_ops = 0L;
cmd_q->total_rsa_ops = 0L;
cmd_q->total_pt_ops = 0L;
cmd_q->total_ecc_ops = 0L;
}
/* A value was written to the stats variable, which
* should be used to reset the queue counters across
* that device.
*/
static ssize_t ccp5_debugfs_stats_write(struct file *filp,
const char __user *ubuf,
size_t count, loff_t *offp)
{
struct ccp_device *ccp = filp->private_data;
int i;
for (i = 0; i < ccp->cmd_q_count; i++)
ccp5_debugfs_reset_queue_stats(&ccp->cmd_q[i]);
ccp->total_interrupts = 0L;
return count;
}
/* Return a formatted buffer containing the current information
* for that queue
*/
static ssize_t ccp5_debugfs_queue_read(struct file *filp, char __user *ubuf,
size_t count, loff_t *offp)
{
struct ccp_cmd_queue *cmd_q = filp->private_data;
unsigned int oboff = 0;
unsigned int regval;
ssize_t ret;
char *obuf;
if (!cmd_q)
return 0;
obuf = kmalloc(OBUFLEN, GFP_KERNEL);
if (!obuf)
return -ENOMEM;
oboff += OSCNPRINTF(" Total Queue Operations: %ld\n",
cmd_q->total_ops);
oboff += OSCNPRINTF(" AES: %ld\n",
cmd_q->total_aes_ops);
oboff += OSCNPRINTF(" XTS AES: %ld\n",
cmd_q->total_xts_aes_ops);
oboff += OSCNPRINTF(" SHA: %ld\n",
cmd_q->total_3des_ops);
oboff += OSCNPRINTF(" SHA: %ld\n",
cmd_q->total_sha_ops);
oboff += OSCNPRINTF(" RSA: %ld\n",
cmd_q->total_rsa_ops);
oboff += OSCNPRINTF(" Pass-Thru: %ld\n",
cmd_q->total_pt_ops);
oboff += OSCNPRINTF(" ECC: %ld\n",
cmd_q->total_ecc_ops);
regval = ioread32(cmd_q->reg_int_enable);
oboff += OSCNPRINTF(" Enabled Interrupts:");
if (regval & INT_EMPTY_QUEUE)
oboff += OSCNPRINTF(" EMPTY");
if (regval & INT_QUEUE_STOPPED)
oboff += OSCNPRINTF(" STOPPED");
if (regval & INT_ERROR)
oboff += OSCNPRINTF(" ERROR");
if (regval & INT_COMPLETION)
oboff += OSCNPRINTF(" COMPLETION");
oboff += OSCNPRINTF("\n");
ret = simple_read_from_buffer(ubuf, count, offp, obuf, oboff);
kfree(obuf);
return ret;
}
/* A value was written to the stats variable for a
* queue. Reset the queue counters to this value.
*/
static ssize_t ccp5_debugfs_queue_write(struct file *filp,
const char __user *ubuf,
size_t count, loff_t *offp)
{
struct ccp_cmd_queue *cmd_q = filp->private_data;
ccp5_debugfs_reset_queue_stats(cmd_q);
return count;
}
static const struct file_operations ccp_debugfs_info_ops = {
.owner = THIS_MODULE,
.open = simple_open,
.read = ccp5_debugfs_info_read,
.write = NULL,
};
static const struct file_operations ccp_debugfs_queue_ops = {
.owner = THIS_MODULE,
.open = simple_open,
.read = ccp5_debugfs_queue_read,
.write = ccp5_debugfs_queue_write,
};
static const struct file_operations ccp_debugfs_stats_ops = {
.owner = THIS_MODULE,
.open = simple_open,
.read = ccp5_debugfs_stats_read,
.write = ccp5_debugfs_stats_write,
};
static struct dentry *ccp_debugfs_dir;
static DEFINE_RWLOCK(ccp_debugfs_lock);
#define MAX_NAME_LEN 20
void ccp5_debugfs_setup(struct ccp_device *ccp)
{
struct ccp_cmd_queue *cmd_q;
char name[MAX_NAME_LEN + 1];
struct dentry *debugfs_info;
struct dentry *debugfs_stats;
struct dentry *debugfs_q_instance;
struct dentry *debugfs_q_stats;
unsigned long flags;
int i;
if (!debugfs_initialized())
return;
write_lock_irqsave(&ccp_debugfs_lock, flags);
if (!ccp_debugfs_dir)
ccp_debugfs_dir = debugfs_create_dir(KBUILD_MODNAME, NULL);
write_unlock_irqrestore(&ccp_debugfs_lock, flags);
if (!ccp_debugfs_dir)
return;
ccp->debugfs_instance = debugfs_create_dir(ccp->name, ccp_debugfs_dir);
if (!ccp->debugfs_instance)
goto err;
debugfs_info = debugfs_create_file("info", 0400,
ccp->debugfs_instance, ccp,
&ccp_debugfs_info_ops);
if (!debugfs_info)
goto err;
debugfs_stats = debugfs_create_file("stats", 0600,
ccp->debugfs_instance, ccp,
&ccp_debugfs_stats_ops);
if (!debugfs_stats)
goto err;
for (i = 0; i < ccp->cmd_q_count; i++) {
cmd_q = &ccp->cmd_q[i];
snprintf(name, MAX_NAME_LEN - 1, "q%d", cmd_q->id);
debugfs_q_instance =
debugfs_create_dir(name, ccp->debugfs_instance);
if (!debugfs_q_instance)
goto err;
debugfs_q_stats =
debugfs_create_file("stats", 0600,
debugfs_q_instance, cmd_q,
&ccp_debugfs_queue_ops);
if (!debugfs_q_stats)
goto err;
}
return;
err:
debugfs_remove_recursive(ccp->debugfs_instance);
}
void ccp5_debugfs_destroy(void)
{
debugfs_remove_recursive(ccp_debugfs_dir);
}
|
