2 * Copyright 2016 Broadcom
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License, version 2, as
6 * published by the Free Software Foundation (the "GPL").
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License version 2 (GPLv2) for more details.
13 * You should have received a copy of the GNU General Public License
14 * version 2 (GPLv2) along with this source code.
17 #include <linux/debugfs.h>
22 /* offset of SPU_OFIFO_CTRL register */
23 #define SPU_OFIFO_CTRL 0x40
24 #define SPU_FIFO_WATERMARK 0x1FF
27 * spu_sg_at_offset() - Find the scatterlist entry at a given distance from the
28 * start of a scatterlist.
29 * @sg: [in] Start of a scatterlist
30 * @skip: [in] Distance from the start of the scatterlist, in bytes
31 * @sge: [out] Scatterlist entry at skip bytes from start
32 * @sge_offset: [out] Number of bytes from start of sge buffer to get to
35 * Return: 0 if entry found at requested distance
38 int spu_sg_at_offset(struct scatterlist *sg, unsigned int skip,
39 struct scatterlist **sge, unsigned int *sge_offset)
41 /* byte index from start of sg to the end of the previous entry */
42 unsigned int index = 0;
43 /* byte index from start of sg to the end of the current entry */
44 unsigned int next_index;
46 next_index = sg->length;
47 while (next_index <= skip) {
52 next_index += sg->length;
55 *sge_offset = skip - index;
60 /* Copy len bytes of sg data, starting at offset skip, to a dest buffer */
61 void sg_copy_part_to_buf(struct scatterlist *src, u8 *dest,
62 unsigned int len, unsigned int skip)
65 unsigned int nents = sg_nents(src);
67 copied = sg_pcopy_to_buffer(src, nents, dest, len, skip);
69 flow_log("%s copied %u bytes of %u requested. ",
70 __func__, (u32)copied, len);
71 flow_log("sg with %u entries and skip %u\n", nents, skip);
76 * Copy data into a scatterlist starting at a specified offset in the
77 * scatterlist. Specifically, copy len bytes of data in the buffer src
78 * into the scatterlist dest, starting skip bytes into the scatterlist.
80 void sg_copy_part_from_buf(struct scatterlist *dest, u8 *src,
81 unsigned int len, unsigned int skip)
84 unsigned int nents = sg_nents(dest);
86 copied = sg_pcopy_from_buffer(dest, nents, src, len, skip);
88 flow_log("%s copied %u bytes of %u requested. ",
89 __func__, (u32)copied, len);
90 flow_log("sg with %u entries and skip %u\n", nents, skip);
95 * spu_sg_count() - Determine number of elements in scatterlist to provide a
96 * specified number of bytes.
97 * @sg_list: scatterlist to examine
98 * @skip: index of starting point
99 * @nbytes: consider elements of scatterlist until reaching this number of
102 * Return: the number of sg entries contributing to nbytes of data
104 int spu_sg_count(struct scatterlist *sg_list, unsigned int skip, int nbytes)
106 struct scatterlist *sg;
113 if (spu_sg_at_offset(sg_list, skip, &sg, &offset) < 0)
116 while (sg && (nbytes > 0)) {
118 nbytes -= (sg->length - offset);
126 * spu_msg_sg_add() - Copy scatterlist entries from one sg to another, up to a
128 * @to_sg: scatterlist to copy to
129 * @from_sg: scatterlist to copy from
130 * @from_skip: number of bytes to skip in from_sg. Non-zero when previous
131 * request included part of the buffer in entry in from_sg.
132 * Assumes from_skip < from_sg->length.
133 * @from_nents number of entries in from_sg
134 * @length number of bytes to copy. may reach this limit before exhausting
137 * Copies the entries themselves, not the data in the entries. Assumes to_sg has
138 * enough entries. Does not limit the size of an individual buffer in to_sg.
140 * to_sg, from_sg, skip are all updated to end of copy
142 * Return: Number of bytes copied
144 u32 spu_msg_sg_add(struct scatterlist **to_sg,
145 struct scatterlist **from_sg, u32 *from_skip,
146 u8 from_nents, u32 length)
148 struct scatterlist *sg; /* an entry in from_sg */
149 struct scatterlist *to = *to_sg;
150 struct scatterlist *from = *from_sg;
151 u32 skip = *from_skip;
155 u32 frag_len = 0; /* length of entry added to to_sg */
156 u32 copied = 0; /* number of bytes copied so far */
161 for_each_sg(from, sg, from_nents, i) {
162 /* number of bytes in this from entry not yet used */
163 entry_len = sg->length - skip;
164 frag_len = min(entry_len, length - copied);
165 offset = sg->offset + skip;
167 sg_set_page(to++, sg_page(sg), frag_len, offset);
169 if (copied == entry_len) {
170 /* used up all of from entry */
171 skip = 0; /* start at beginning of next entry */
173 if (copied == length)
178 if (frag_len < entry_len)
179 *from_skip = skip + frag_len;
186 void add_to_ctr(u8 *ctr_pos, unsigned int increment)
188 __be64 *high_be = (__be64 *)ctr_pos;
189 __be64 *low_be = high_be + 1;
190 u64 orig_low = __be64_to_cpu(*low_be);
191 u64 new_low = orig_low + (u64)increment;
193 *low_be = __cpu_to_be64(new_low);
194 if (new_low < orig_low)
195 /* there was a carry from the low 8 bytes */
196 *high_be = __cpu_to_be64(__be64_to_cpu(*high_be) + 1);
200 struct shash_desc shash;
205 * do_shash() - Do a synchronous hash operation in software
206 * @name: The name of the hash algorithm
207 * @result: Buffer where digest is to be written
208 * @data1: First part of data to hash. May be NULL.
209 * @data1_len: Length of data1, in bytes
210 * @data2: Second part of data to hash. May be NULL.
211 * @data2_len: Length of data2, in bytes
212 * @key: Key (if keyed hash)
213 * @key_len: Length of key, in bytes (or 0 if non-keyed hash)
215 * Note that the crypto API will not select this driver's own transform because
216 * this driver only registers asynchronous algos.
218 * Return: 0 if hash successfully stored in result
221 int do_shash(unsigned char *name, unsigned char *result,
222 const u8 *data1, unsigned int data1_len,
223 const u8 *data2, unsigned int data2_len,
224 const u8 *key, unsigned int key_len)
228 struct crypto_shash *hash;
231 hash = crypto_alloc_shash(name, 0, 0);
234 pr_err("%s: Crypto %s allocation error %d\n", __func__, name, rc);
238 size = sizeof(struct shash_desc) + crypto_shash_descsize(hash);
239 sdesc = kmalloc(size, GFP_KERNEL);
244 sdesc->shash.tfm = hash;
247 rc = crypto_shash_setkey(hash, key, key_len);
249 pr_err("%s: Could not setkey %s shash\n", __func__, name);
254 rc = crypto_shash_init(&sdesc->shash);
256 pr_err("%s: Could not init %s shash\n", __func__, name);
259 rc = crypto_shash_update(&sdesc->shash, data1, data1_len);
261 pr_err("%s: Could not update1\n", __func__);
264 if (data2 && data2_len) {
265 rc = crypto_shash_update(&sdesc->shash, data2, data2_len);
267 pr_err("%s: Could not update2\n", __func__);
271 rc = crypto_shash_final(&sdesc->shash, result);
273 pr_err("%s: Could not generate %s hash\n", __func__, name);
276 crypto_free_shash(hash);
282 /* Dump len bytes of a scatterlist starting at skip bytes into the sg */
283 void __dump_sg(struct scatterlist *sg, unsigned int skip, unsigned int len)
286 unsigned int idx = skip;
287 unsigned int num_out = 0; /* number of bytes dumped so far */
290 if (packet_debug_logging) {
291 while (num_out < len) {
292 count = (len - num_out > 16) ? 16 : len - num_out;
293 sg_copy_part_to_buf(sg, dbuf, count, idx);
295 print_hex_dump(KERN_ALERT, " sg: ", DUMP_PREFIX_NONE,
296 4, 1, dbuf, count, false);
300 if (debug_logging_sleep)
301 msleep(debug_logging_sleep);
304 /* Returns the name for a given cipher alg/mode */
305 char *spu_alg_name(enum spu_cipher_alg alg, enum spu_cipher_mode mode)
312 case CIPHER_MODE_CBC:
314 case CIPHER_MODE_ECB:
316 case CIPHER_MODE_OFB:
318 case CIPHER_MODE_CFB:
320 case CIPHER_MODE_CTR:
322 case CIPHER_MODE_XTS:
324 case CIPHER_MODE_GCM:
332 case CIPHER_MODE_CBC:
334 case CIPHER_MODE_ECB:
336 case CIPHER_MODE_CTR:
342 case CIPHER_ALG_3DES:
344 case CIPHER_MODE_CBC:
345 return "cbc(des3_ede)";
346 case CIPHER_MODE_ECB:
347 return "ecb(des3_ede)";
348 case CIPHER_MODE_CTR:
349 return "ctr(des3_ede)";
359 static ssize_t spu_debugfs_read(struct file *filp, char __user *ubuf,
360 size_t count, loff_t *offp)
362 struct device_private *ipriv;
364 ssize_t ret, out_offset, out_count;
374 buf = kmalloc(out_count, GFP_KERNEL);
378 ipriv = filp->private_data;
380 out_offset += snprintf(buf + out_offset, out_count - out_offset,
381 "Number of SPUs.........%u\n",
383 out_offset += snprintf(buf + out_offset, out_count - out_offset,
384 "Current sessions.......%u\n",
385 atomic_read(&ipriv->session_count));
386 out_offset += snprintf(buf + out_offset, out_count - out_offset,
387 "Session count..........%u\n",
388 atomic_read(&ipriv->stream_count));
389 out_offset += snprintf(buf + out_offset, out_count - out_offset,
390 "Cipher setkey..........%u\n",
391 atomic_read(&ipriv->setkey_cnt[SPU_OP_CIPHER]));
392 out_offset += snprintf(buf + out_offset, out_count - out_offset,
393 "Cipher Ops.............%u\n",
394 atomic_read(&ipriv->op_counts[SPU_OP_CIPHER]));
395 for (alg = 0; alg < CIPHER_ALG_LAST; alg++) {
396 for (mode = 0; mode < CIPHER_MODE_LAST; mode++) {
397 op_cnt = atomic_read(&ipriv->cipher_cnt[alg][mode]);
399 out_offset += snprintf(buf + out_offset,
400 out_count - out_offset,
402 spu_alg_name(alg, mode), op_cnt);
406 out_offset += snprintf(buf + out_offset, out_count - out_offset,
407 "Hash Ops...............%u\n",
408 atomic_read(&ipriv->op_counts[SPU_OP_HASH]));
409 for (alg = 0; alg < HASH_ALG_LAST; alg++) {
410 op_cnt = atomic_read(&ipriv->hash_cnt[alg]);
412 out_offset += snprintf(buf + out_offset,
413 out_count - out_offset,
415 hash_alg_name[alg], op_cnt);
418 out_offset += snprintf(buf + out_offset, out_count - out_offset,
419 "HMAC setkey............%u\n",
420 atomic_read(&ipriv->setkey_cnt[SPU_OP_HMAC]));
421 out_offset += snprintf(buf + out_offset, out_count - out_offset,
422 "HMAC Ops...............%u\n",
423 atomic_read(&ipriv->op_counts[SPU_OP_HMAC]));
424 for (alg = 0; alg < HASH_ALG_LAST; alg++) {
425 op_cnt = atomic_read(&ipriv->hmac_cnt[alg]);
427 out_offset += snprintf(buf + out_offset,
428 out_count - out_offset,
430 hash_alg_name[alg], op_cnt);
433 out_offset += snprintf(buf + out_offset, out_count - out_offset,
434 "AEAD setkey............%u\n",
435 atomic_read(&ipriv->setkey_cnt[SPU_OP_AEAD]));
437 out_offset += snprintf(buf + out_offset, out_count - out_offset,
438 "AEAD Ops...............%u\n",
439 atomic_read(&ipriv->op_counts[SPU_OP_AEAD]));
440 for (alg = 0; alg < AEAD_TYPE_LAST; alg++) {
441 op_cnt = atomic_read(&ipriv->aead_cnt[alg]);
443 out_offset += snprintf(buf + out_offset,
444 out_count - out_offset,
446 aead_alg_name[alg], op_cnt);
449 out_offset += snprintf(buf + out_offset, out_count - out_offset,
450 "Bytes of req data......%llu\n",
451 (u64)atomic64_read(&ipriv->bytes_out));
452 out_offset += snprintf(buf + out_offset, out_count - out_offset,
453 "Bytes of resp data.....%llu\n",
454 (u64)atomic64_read(&ipriv->bytes_in));
455 out_offset += snprintf(buf + out_offset, out_count - out_offset,
456 "Mailbox full...........%u\n",
457 atomic_read(&ipriv->mb_no_spc));
458 out_offset += snprintf(buf + out_offset, out_count - out_offset,
459 "Mailbox send failures..%u\n",
460 atomic_read(&ipriv->mb_send_fail));
461 out_offset += snprintf(buf + out_offset, out_count - out_offset,
462 "Check ICV errors.......%u\n",
463 atomic_read(&ipriv->bad_icv));
464 if (ipriv->spu.spu_type == SPU_TYPE_SPUM)
465 for (i = 0; i < ipriv->spu.num_spu; i++) {
466 spu_ofifo_ctrl = ioread32(ipriv->spu.reg_vbase[i] +
468 fifo_len = spu_ofifo_ctrl & SPU_FIFO_WATERMARK;
469 out_offset += snprintf(buf + out_offset,
470 out_count - out_offset,
471 "SPU %d output FIFO high water.....%u\n",
475 if (out_offset > out_count)
476 out_offset = out_count;
478 ret = simple_read_from_buffer(ubuf, count, offp, buf, out_offset);
483 static const struct file_operations spu_debugfs_stats = {
484 .owner = THIS_MODULE,
486 .read = spu_debugfs_read,
490 * Create the debug FS directories. If the top-level directory has not yet
491 * been created, create it now. Create a stats file in this directory for
494 void spu_setup_debugfs(void)
496 if (!debugfs_initialized())
499 if (!iproc_priv.debugfs_dir)
500 iproc_priv.debugfs_dir = debugfs_create_dir(KBUILD_MODNAME,
503 if (!iproc_priv.debugfs_stats)
504 /* Create file with permissions S_IRUSR */
505 debugfs_create_file("stats", 0400, iproc_priv.debugfs_dir,
506 &iproc_priv, &spu_debugfs_stats);
509 void spu_free_debugfs(void)
511 debugfs_remove_recursive(iproc_priv.debugfs_dir);
512 iproc_priv.debugfs_dir = NULL;
516 * format_value_ccm() - Format a value into a buffer, using a specified number
517 * of bytes (i.e. maybe writing value X into a 4 byte
518 * buffer, or maybe into a 12 byte buffer), as per the
521 * @val: value to write (up to max of unsigned int)
522 * @buf: (pointer to) buffer to write the value
523 * @len: number of bytes to use (0 to 255)
526 void format_value_ccm(unsigned int val, u8 *buf, u8 len)
530 /* First clear full output buffer */
533 /* Then, starting from right side, fill in with data */
534 for (i = 0; i < len; i++) {
535 buf[len - i - 1] = (val >> (8 * i)) & 0xff;
537 break; /* Only handle up to 32 bits of 'val' */