1 /*
2 This file is provided under a dual BSD/GPLv2 license. When using or
3 redistributing this file, you may do so under either license.
4
5 GPL LICENSE SUMMARY
6 Copyright(c) 2014 Intel Corporation.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of version 2 of the GNU General Public License as
9 published by the Free Software Foundation.
10
11 This program is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
15
16 Contact Information:
17 qat-linux@intel.com
18
19 BSD LICENSE
20 Copyright(c) 2014 Intel Corporation.
21 Redistribution and use in source and binary forms, with or without
22 modification, are permitted provided that the following conditions
23 are met:
24
25 * Redistributions of source code must retain the above copyright
26 notice, this list of conditions and the following disclaimer.
27 * Redistributions in binary form must reproduce the above copyright
28 notice, this list of conditions and the following disclaimer in
29 the documentation and/or other materials provided with the
30 distribution.
31 * Neither the name of Intel Corporation nor the names of its
32 contributors may be used to endorse or promote products derived
33 from this software without specific prior written permission.
34
35 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
36 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
37 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
38 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
39 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
41 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
42 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
43 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
44 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
45 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
46 */
47 #include <linux/mutex.h>
48 #include <linux/slab.h>
49 #include <linux/seq_file.h>
50 #include "adf_accel_devices.h"
51 #include "adf_transport_internal.h"
52 #include "adf_transport_access_macros.h"
53
54 static DEFINE_MUTEX(ring_read_lock);
55 static DEFINE_MUTEX(bank_read_lock);
56
adf_ring_start(struct seq_file * sfile,loff_t * pos)57 static void *adf_ring_start(struct seq_file *sfile, loff_t *pos)
58 {
59 struct adf_etr_ring_data *ring = sfile->private;
60
61 mutex_lock(&ring_read_lock);
62 if (*pos == 0)
63 return SEQ_START_TOKEN;
64
65 if (*pos >= (ADF_SIZE_TO_RING_SIZE_IN_BYTES(ring->ring_size) /
66 ADF_MSG_SIZE_TO_BYTES(ring->msg_size)))
67 return NULL;
68
69 return ring->base_addr +
70 (ADF_MSG_SIZE_TO_BYTES(ring->msg_size) * (*pos)++);
71 }
72
adf_ring_next(struct seq_file * sfile,void * v,loff_t * pos)73 static void *adf_ring_next(struct seq_file *sfile, void *v, loff_t *pos)
74 {
75 struct adf_etr_ring_data *ring = sfile->private;
76
77 if (*pos >= (ADF_SIZE_TO_RING_SIZE_IN_BYTES(ring->ring_size) /
78 ADF_MSG_SIZE_TO_BYTES(ring->msg_size)))
79 return NULL;
80
81 return ring->base_addr +
82 (ADF_MSG_SIZE_TO_BYTES(ring->msg_size) * (*pos)++);
83 }
84
adf_ring_show(struct seq_file * sfile,void * v)85 static int adf_ring_show(struct seq_file *sfile, void *v)
86 {
87 struct adf_etr_ring_data *ring = sfile->private;
88 struct adf_etr_bank_data *bank = ring->bank;
89 uint32_t *msg = v;
90 void __iomem *csr = ring->bank->csr_addr;
91 int i, x;
92
93 if (v == SEQ_START_TOKEN) {
94 int head, tail, empty;
95
96 head = READ_CSR_RING_HEAD(csr, bank->bank_number,
97 ring->ring_number);
98 tail = READ_CSR_RING_TAIL(csr, bank->bank_number,
99 ring->ring_number);
100 empty = READ_CSR_E_STAT(csr, bank->bank_number);
101
102 seq_puts(sfile, "------- Ring configuration -------\n");
103 seq_printf(sfile, "ring name: %s\n",
104 ring->ring_debug->ring_name);
105 seq_printf(sfile, "ring num %d, bank num %d\n",
106 ring->ring_number, ring->bank->bank_number);
107 seq_printf(sfile, "head %x, tail %x, empty: %d\n",
108 head, tail, (empty & 1 << ring->ring_number)
109 >> ring->ring_number);
110 seq_printf(sfile, "ring size %d, msg size %d\n",
111 ADF_SIZE_TO_RING_SIZE_IN_BYTES(ring->ring_size),
112 ADF_MSG_SIZE_TO_BYTES(ring->msg_size));
113 seq_puts(sfile, "----------- Ring data ------------\n");
114 return 0;
115 }
116 seq_printf(sfile, "%p:", msg);
117 x = 0;
118 i = 0;
119 for (; i < (ADF_MSG_SIZE_TO_BYTES(ring->msg_size) >> 2); i++) {
120 seq_printf(sfile, " %08X", *(msg + i));
121 if ((ADF_MSG_SIZE_TO_BYTES(ring->msg_size) >> 2) != i + 1 &&
122 (++x == 8)) {
123 seq_printf(sfile, "\n%p:", msg + i + 1);
124 x = 0;
125 }
126 }
127 seq_puts(sfile, "\n");
128 return 0;
129 }
130
adf_ring_stop(struct seq_file * sfile,void * v)131 static void adf_ring_stop(struct seq_file *sfile, void *v)
132 {
133 mutex_unlock(&ring_read_lock);
134 }
135
136 static const struct seq_operations adf_ring_sops = {
137 .start = adf_ring_start,
138 .next = adf_ring_next,
139 .stop = adf_ring_stop,
140 .show = adf_ring_show
141 };
142
adf_ring_open(struct inode * inode,struct file * file)143 static int adf_ring_open(struct inode *inode, struct file *file)
144 {
145 int ret = seq_open(file, &adf_ring_sops);
146
147 if (!ret) {
148 struct seq_file *seq_f = file->private_data;
149
150 seq_f->private = inode->i_private;
151 }
152 return ret;
153 }
154
155 static const struct file_operations adf_ring_debug_fops = {
156 .open = adf_ring_open,
157 .read = seq_read,
158 .llseek = seq_lseek,
159 .release = seq_release
160 };
161
adf_ring_debugfs_add(struct adf_etr_ring_data * ring,const char * name)162 int adf_ring_debugfs_add(struct adf_etr_ring_data *ring, const char *name)
163 {
164 struct adf_etr_ring_debug_entry *ring_debug;
165 char entry_name[8];
166
167 ring_debug = kzalloc(sizeof(*ring_debug), GFP_KERNEL);
168 if (!ring_debug)
169 return -ENOMEM;
170
171 strlcpy(ring_debug->ring_name, name, sizeof(ring_debug->ring_name));
172 snprintf(entry_name, sizeof(entry_name), "ring_%02d",
173 ring->ring_number);
174
175 ring_debug->debug = debugfs_create_file(entry_name, S_IRUSR,
176 ring->bank->bank_debug_dir,
177 ring, &adf_ring_debug_fops);
178 if (!ring_debug->debug) {
179 pr_err("QAT: Failed to create ring debug entry.\n");
180 kfree(ring_debug);
181 return -EFAULT;
182 }
183 ring->ring_debug = ring_debug;
184 return 0;
185 }
186
adf_ring_debugfs_rm(struct adf_etr_ring_data * ring)187 void adf_ring_debugfs_rm(struct adf_etr_ring_data *ring)
188 {
189 if (ring->ring_debug) {
190 debugfs_remove(ring->ring_debug->debug);
191 kfree(ring->ring_debug);
192 ring->ring_debug = NULL;
193 }
194 }
195
adf_bank_start(struct seq_file * sfile,loff_t * pos)196 static void *adf_bank_start(struct seq_file *sfile, loff_t *pos)
197 {
198 mutex_lock(&bank_read_lock);
199 if (*pos == 0)
200 return SEQ_START_TOKEN;
201
202 if (*pos >= ADF_ETR_MAX_RINGS_PER_BANK)
203 return NULL;
204
205 return pos;
206 }
207
adf_bank_next(struct seq_file * sfile,void * v,loff_t * pos)208 static void *adf_bank_next(struct seq_file *sfile, void *v, loff_t *pos)
209 {
210 if (++(*pos) >= ADF_ETR_MAX_RINGS_PER_BANK)
211 return NULL;
212
213 return pos;
214 }
215
adf_bank_show(struct seq_file * sfile,void * v)216 static int adf_bank_show(struct seq_file *sfile, void *v)
217 {
218 struct adf_etr_bank_data *bank = sfile->private;
219
220 if (v == SEQ_START_TOKEN) {
221 seq_printf(sfile, "------- Bank %d configuration -------\n",
222 bank->bank_number);
223 } else {
224 int ring_id = *((int *)v) - 1;
225 struct adf_etr_ring_data *ring = &bank->rings[ring_id];
226 void __iomem *csr = bank->csr_addr;
227 int head, tail, empty;
228
229 if (!(bank->ring_mask & 1 << ring_id))
230 return 0;
231
232 head = READ_CSR_RING_HEAD(csr, bank->bank_number,
233 ring->ring_number);
234 tail = READ_CSR_RING_TAIL(csr, bank->bank_number,
235 ring->ring_number);
236 empty = READ_CSR_E_STAT(csr, bank->bank_number);
237
238 seq_printf(sfile,
239 "ring num %02d, head %04x, tail %04x, empty: %d\n",
240 ring->ring_number, head, tail,
241 (empty & 1 << ring->ring_number) >>
242 ring->ring_number);
243 }
244 return 0;
245 }
246
adf_bank_stop(struct seq_file * sfile,void * v)247 static void adf_bank_stop(struct seq_file *sfile, void *v)
248 {
249 mutex_unlock(&bank_read_lock);
250 }
251
252 static const struct seq_operations adf_bank_sops = {
253 .start = adf_bank_start,
254 .next = adf_bank_next,
255 .stop = adf_bank_stop,
256 .show = adf_bank_show
257 };
258
adf_bank_open(struct inode * inode,struct file * file)259 static int adf_bank_open(struct inode *inode, struct file *file)
260 {
261 int ret = seq_open(file, &adf_bank_sops);
262
263 if (!ret) {
264 struct seq_file *seq_f = file->private_data;
265
266 seq_f->private = inode->i_private;
267 }
268 return ret;
269 }
270
271 static const struct file_operations adf_bank_debug_fops = {
272 .open = adf_bank_open,
273 .read = seq_read,
274 .llseek = seq_lseek,
275 .release = seq_release
276 };
277
adf_bank_debugfs_add(struct adf_etr_bank_data * bank)278 int adf_bank_debugfs_add(struct adf_etr_bank_data *bank)
279 {
280 struct adf_accel_dev *accel_dev = bank->accel_dev;
281 struct dentry *parent = accel_dev->transport->debug;
282 char name[8];
283
284 snprintf(name, sizeof(name), "bank_%02d", bank->bank_number);
285 bank->bank_debug_dir = debugfs_create_dir(name, parent);
286 if (!bank->bank_debug_dir) {
287 pr_err("QAT: Failed to create bank debug dir.\n");
288 return -EFAULT;
289 }
290
291 bank->bank_debug_cfg = debugfs_create_file("config", S_IRUSR,
292 bank->bank_debug_dir, bank,
293 &adf_bank_debug_fops);
294 if (!bank->bank_debug_cfg) {
295 pr_err("QAT: Failed to create bank debug entry.\n");
296 debugfs_remove(bank->bank_debug_dir);
297 return -EFAULT;
298 }
299 return 0;
300 }
301
adf_bank_debugfs_rm(struct adf_etr_bank_data * bank)302 void adf_bank_debugfs_rm(struct adf_etr_bank_data *bank)
303 {
304 debugfs_remove(bank->bank_debug_cfg);
305 debugfs_remove(bank->bank_debug_dir);
306 }
307