164d85cc9SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
210cb823bSAditya Srivastava /*
3fc482a86SKent Yoder * SHA-512 routines supporting the Power 7+ Nest Accelerators driver
4fc482a86SKent Yoder *
5fc482a86SKent Yoder * Copyright (C) 2011-2012 International Business Machines Inc.
6fc482a86SKent Yoder *
7fc482a86SKent Yoder * Author: Kent Yoder <yoder1@us.ibm.com>
8fc482a86SKent Yoder */
9fc482a86SKent Yoder
10fc482a86SKent Yoder #include <crypto/internal/hash.h>
11a24d22b2SEric Biggers #include <crypto/sha2.h>
12fc482a86SKent Yoder #include <linux/module.h>
13fc482a86SKent Yoder #include <asm/vio.h>
14fc482a86SKent Yoder
15fc482a86SKent Yoder #include "nx_csbcpb.h"
16fc482a86SKent Yoder #include "nx.h"
17fc482a86SKent Yoder
18*b20d9a73SHerbert Xu struct sha512_state_be {
19*b20d9a73SHerbert Xu __be64 state[SHA512_DIGEST_SIZE / 8];
20*b20d9a73SHerbert Xu u64 count[2];
21*b20d9a73SHerbert Xu u8 buf[SHA512_BLOCK_SIZE];
22*b20d9a73SHerbert Xu };
23fc482a86SKent Yoder
nx_crypto_ctx_sha512_init(struct crypto_tfm * tfm)24030f4e96SHerbert Xu static int nx_crypto_ctx_sha512_init(struct crypto_tfm *tfm)
25fc482a86SKent Yoder {
26030f4e96SHerbert Xu struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(tfm);
27030f4e96SHerbert Xu int err;
28030f4e96SHerbert Xu
29030f4e96SHerbert Xu err = nx_crypto_ctx_sha_init(tfm);
30030f4e96SHerbert Xu if (err)
31030f4e96SHerbert Xu return err;
32fc482a86SKent Yoder
33fc482a86SKent Yoder nx_ctx_init(nx_ctx, HCOP_FC_SHA);
34fc482a86SKent Yoder
35fc482a86SKent Yoder nx_ctx->ap = &nx_ctx->props[NX_PROPS_SHA512];
36fc482a86SKent Yoder
37fc482a86SKent Yoder NX_CPB_SET_DIGEST_SIZE(nx_ctx->csbcpb, NX_DS_SHA512);
38fc482a86SKent Yoder
39030f4e96SHerbert Xu return 0;
40030f4e96SHerbert Xu }
4100085111SLeonidas S. Barbosa
nx_sha512_init(struct shash_desc * desc)42030f4e96SHerbert Xu static int nx_sha512_init(struct shash_desc *desc)
43030f4e96SHerbert Xu {
44*b20d9a73SHerbert Xu struct sha512_state_be *sctx = shash_desc_ctx(desc);
4510d87b73SLeonidas Da Silva Barbosa
46030f4e96SHerbert Xu memset(sctx, 0, sizeof *sctx);
4700085111SLeonidas S. Barbosa
4800085111SLeonidas S. Barbosa sctx->state[0] = __cpu_to_be64(SHA512_H0);
4900085111SLeonidas S. Barbosa sctx->state[1] = __cpu_to_be64(SHA512_H1);
5000085111SLeonidas S. Barbosa sctx->state[2] = __cpu_to_be64(SHA512_H2);
5100085111SLeonidas S. Barbosa sctx->state[3] = __cpu_to_be64(SHA512_H3);
5200085111SLeonidas S. Barbosa sctx->state[4] = __cpu_to_be64(SHA512_H4);
5300085111SLeonidas S. Barbosa sctx->state[5] = __cpu_to_be64(SHA512_H5);
5400085111SLeonidas S. Barbosa sctx->state[6] = __cpu_to_be64(SHA512_H6);
5500085111SLeonidas S. Barbosa sctx->state[7] = __cpu_to_be64(SHA512_H7);
5600085111SLeonidas S. Barbosa sctx->count[0] = 0;
5700085111SLeonidas S. Barbosa
58fc482a86SKent Yoder return 0;
59fc482a86SKent Yoder }
60fc482a86SKent Yoder
nx_sha512_update(struct shash_desc * desc,const u8 * data,unsigned int len)61fc482a86SKent Yoder static int nx_sha512_update(struct shash_desc *desc, const u8 *data,
62fc482a86SKent Yoder unsigned int len)
63fc482a86SKent Yoder {
64*b20d9a73SHerbert Xu struct sha512_state_be *sctx = shash_desc_ctx(desc);
65fc482a86SKent Yoder struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(&desc->tfm->base);
66fc482a86SKent Yoder struct nx_csbcpb *csbcpb = (struct nx_csbcpb *)nx_ctx->csbcpb;
67030f4e96SHerbert Xu struct nx_sg *out_sg;
6800085111SLeonidas S. Barbosa u64 to_process, leftover = 0, total;
69c849163bSMarcelo Cerri unsigned long irq_flags;
70fc482a86SKent Yoder int rc = 0;
7100085111SLeonidas S. Barbosa int data_len;
7210d87b73SLeonidas Da Silva Barbosa u32 max_sg_len;
7300085111SLeonidas S. Barbosa u64 buf_len = (sctx->count[0] % SHA512_BLOCK_SIZE);
74fc482a86SKent Yoder
75c849163bSMarcelo Cerri spin_lock_irqsave(&nx_ctx->lock, irq_flags);
76c849163bSMarcelo Cerri
77fc482a86SKent Yoder /* 2 cases for total data len:
78d3111493SMarcelo Cerri * 1: < SHA512_BLOCK_SIZE: copy into state, return 0
79d3111493SMarcelo Cerri * 2: >= SHA512_BLOCK_SIZE: process X blocks, copy in leftover
80fc482a86SKent Yoder */
8100085111SLeonidas S. Barbosa total = (sctx->count[0] % SHA512_BLOCK_SIZE) + len;
82d3111493SMarcelo Cerri if (total < SHA512_BLOCK_SIZE) {
8300085111SLeonidas S. Barbosa memcpy(sctx->buf + buf_len, data, len);
84fc482a86SKent Yoder sctx->count[0] += len;
85fc482a86SKent Yoder goto out;
86fc482a86SKent Yoder }
87fc482a86SKent Yoder
8800085111SLeonidas S. Barbosa memcpy(csbcpb->cpb.sha512.message_digest, sctx->state, SHA512_DIGEST_SIZE);
8900085111SLeonidas S. Barbosa NX_CPB_FDM(csbcpb) |= NX_FDM_INTERMEDIATE;
9000085111SLeonidas S. Barbosa NX_CPB_FDM(csbcpb) |= NX_FDM_CONTINUATION;
91d3111493SMarcelo Cerri
9210d87b73SLeonidas Da Silva Barbosa max_sg_len = min_t(u64, nx_ctx->ap->sglen,
9310d87b73SLeonidas Da Silva Barbosa nx_driver.of.max_sg_len/sizeof(struct nx_sg));
9410d87b73SLeonidas Da Silva Barbosa max_sg_len = min_t(u64, max_sg_len,
9510d87b73SLeonidas Da Silva Barbosa nx_ctx->ap->databytelen/NX_PAGE_SIZE);
9610d87b73SLeonidas Da Silva Barbosa
97030f4e96SHerbert Xu data_len = SHA512_DIGEST_SIZE;
98030f4e96SHerbert Xu out_sg = nx_build_sg_list(nx_ctx->out_sg, (u8 *)sctx->state,
99030f4e96SHerbert Xu &data_len, max_sg_len);
100030f4e96SHerbert Xu nx_ctx->op.outlen = (nx_ctx->out_sg - out_sg) * sizeof(struct nx_sg);
101030f4e96SHerbert Xu
102030f4e96SHerbert Xu if (data_len != SHA512_DIGEST_SIZE) {
103030f4e96SHerbert Xu rc = -EINVAL;
104030f4e96SHerbert Xu goto out;
105030f4e96SHerbert Xu }
106030f4e96SHerbert Xu
107d3111493SMarcelo Cerri do {
108d3392f41SJan Stancek int used_sgs = 0;
109d3392f41SJan Stancek struct nx_sg *in_sg = nx_ctx->in_sg;
110fc482a86SKent Yoder
11100085111SLeonidas S. Barbosa if (buf_len) {
11200085111SLeonidas S. Barbosa data_len = buf_len;
113d3392f41SJan Stancek in_sg = nx_build_sg_list(in_sg,
114d3111493SMarcelo Cerri (u8 *) sctx->buf,
11510d87b73SLeonidas Da Silva Barbosa &data_len, max_sg_len);
116d3111493SMarcelo Cerri
11710d87b73SLeonidas Da Silva Barbosa if (data_len != buf_len) {
11810d87b73SLeonidas Da Silva Barbosa rc = -EINVAL;
11900085111SLeonidas S. Barbosa goto out;
12000085111SLeonidas S. Barbosa }
121d3392f41SJan Stancek used_sgs = in_sg - nx_ctx->in_sg;
12210d87b73SLeonidas Da Silva Barbosa }
12300085111SLeonidas S. Barbosa
124d3392f41SJan Stancek /* to_process: SHA512_BLOCK_SIZE aligned chunk to be
125d3392f41SJan Stancek * processed in this iteration. This value is restricted
126d3392f41SJan Stancek * by sg list limits and number of sgs we already used
127d3392f41SJan Stancek * for leftover data. (see above)
128d3392f41SJan Stancek * In ideal case, we could allow NX_PAGE_SIZE * max_sg_len,
129d3392f41SJan Stancek * but because data may not be aligned, we need to account
130d3392f41SJan Stancek * for that too. */
131d3392f41SJan Stancek to_process = min_t(u64, total,
132d3392f41SJan Stancek (max_sg_len - 1 - used_sgs) * NX_PAGE_SIZE);
133d3392f41SJan Stancek to_process = to_process & ~(SHA512_BLOCK_SIZE - 1);
134d3392f41SJan Stancek
13500085111SLeonidas S. Barbosa data_len = to_process - buf_len;
13610d87b73SLeonidas Da Silva Barbosa in_sg = nx_build_sg_list(in_sg, (u8 *) data,
13710d87b73SLeonidas Da Silva Barbosa &data_len, max_sg_len);
13800085111SLeonidas S. Barbosa
13910d87b73SLeonidas Da Silva Barbosa nx_ctx->op.inlen = (nx_ctx->in_sg - in_sg) * sizeof(struct nx_sg);
14010d87b73SLeonidas Da Silva Barbosa
14110d87b73SLeonidas Da Silva Barbosa if (data_len != (to_process - buf_len)) {
14210d87b73SLeonidas Da Silva Barbosa rc = -EINVAL;
14300085111SLeonidas S. Barbosa goto out;
14410d87b73SLeonidas Da Silva Barbosa }
14500085111SLeonidas S. Barbosa
146d3392f41SJan Stancek to_process = data_len + buf_len;
14700085111SLeonidas S. Barbosa leftover = total - to_process;
14800085111SLeonidas S. Barbosa
149d3111493SMarcelo Cerri /*
150d3111493SMarcelo Cerri * we've hit the nx chip previously and we're updating
151d3111493SMarcelo Cerri * again, so copy over the partial digest.
152d3111493SMarcelo Cerri */
153d3111493SMarcelo Cerri memcpy(csbcpb->cpb.sha512.input_partial_digest,
154d3111493SMarcelo Cerri csbcpb->cpb.sha512.message_digest,
155d3111493SMarcelo Cerri SHA512_DIGEST_SIZE);
156fc482a86SKent Yoder
157fc482a86SKent Yoder if (!nx_ctx->op.inlen || !nx_ctx->op.outlen) {
158fc482a86SKent Yoder rc = -EINVAL;
159fc482a86SKent Yoder goto out;
160fc482a86SKent Yoder }
161fc482a86SKent Yoder
16275f22228SEric Biggers rc = nx_hcall_sync(nx_ctx, &nx_ctx->op, 0);
163fc482a86SKent Yoder if (rc)
164fc482a86SKent Yoder goto out;
165fc482a86SKent Yoder
166fc482a86SKent Yoder atomic_inc(&(nx_ctx->stats->sha512_ops));
167d3111493SMarcelo Cerri
168d3111493SMarcelo Cerri total -= to_process;
16900085111SLeonidas S. Barbosa data += to_process - buf_len;
17000085111SLeonidas S. Barbosa buf_len = 0;
17100085111SLeonidas S. Barbosa
172d3111493SMarcelo Cerri } while (leftover >= SHA512_BLOCK_SIZE);
173d3111493SMarcelo Cerri
174d3111493SMarcelo Cerri /* copy the leftover back into the state struct */
175d3111493SMarcelo Cerri if (leftover)
176d3111493SMarcelo Cerri memcpy(sctx->buf, data, leftover);
17700085111SLeonidas S. Barbosa sctx->count[0] += len;
17800085111SLeonidas S. Barbosa memcpy(sctx->state, csbcpb->cpb.sha512.message_digest, SHA512_DIGEST_SIZE);
179fc482a86SKent Yoder out:
180c849163bSMarcelo Cerri spin_unlock_irqrestore(&nx_ctx->lock, irq_flags);
181fc482a86SKent Yoder return rc;
182fc482a86SKent Yoder }
183fc482a86SKent Yoder
nx_sha512_final(struct shash_desc * desc,u8 * out)184fc482a86SKent Yoder static int nx_sha512_final(struct shash_desc *desc, u8 *out)
185fc482a86SKent Yoder {
186*b20d9a73SHerbert Xu struct sha512_state_be *sctx = shash_desc_ctx(desc);
187fc482a86SKent Yoder struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(&desc->tfm->base);
188fc482a86SKent Yoder struct nx_csbcpb *csbcpb = (struct nx_csbcpb *)nx_ctx->csbcpb;
18910d87b73SLeonidas Da Silva Barbosa struct nx_sg *in_sg, *out_sg;
19010d87b73SLeonidas Da Silva Barbosa u32 max_sg_len;
191fc482a86SKent Yoder u64 count0;
192c849163bSMarcelo Cerri unsigned long irq_flags;
19310d87b73SLeonidas Da Silva Barbosa int rc = 0;
19400085111SLeonidas S. Barbosa int len;
195fc482a86SKent Yoder
196c849163bSMarcelo Cerri spin_lock_irqsave(&nx_ctx->lock, irq_flags);
197c849163bSMarcelo Cerri
19810d87b73SLeonidas Da Silva Barbosa max_sg_len = min_t(u64, nx_ctx->ap->sglen,
19910d87b73SLeonidas Da Silva Barbosa nx_driver.of.max_sg_len/sizeof(struct nx_sg));
20010d87b73SLeonidas Da Silva Barbosa max_sg_len = min_t(u64, max_sg_len,
20110d87b73SLeonidas Da Silva Barbosa nx_ctx->ap->databytelen/NX_PAGE_SIZE);
20210d87b73SLeonidas Da Silva Barbosa
203fc482a86SKent Yoder /* final is represented by continuing the operation and indicating that
204fc482a86SKent Yoder * this is not an intermediate operation */
20500085111SLeonidas S. Barbosa if (sctx->count[0] >= SHA512_BLOCK_SIZE) {
20600085111SLeonidas S. Barbosa /* we've hit the nx chip previously, now we're finalizing,
20700085111SLeonidas S. Barbosa * so copy over the partial digest */
20800085111SLeonidas S. Barbosa memcpy(csbcpb->cpb.sha512.input_partial_digest, sctx->state,
20900085111SLeonidas S. Barbosa SHA512_DIGEST_SIZE);
21000085111SLeonidas S. Barbosa NX_CPB_FDM(csbcpb) &= ~NX_FDM_INTERMEDIATE;
21100085111SLeonidas S. Barbosa NX_CPB_FDM(csbcpb) |= NX_FDM_CONTINUATION;
21200085111SLeonidas S. Barbosa } else {
21300085111SLeonidas S. Barbosa NX_CPB_FDM(csbcpb) &= ~NX_FDM_INTERMEDIATE;
21400085111SLeonidas S. Barbosa NX_CPB_FDM(csbcpb) &= ~NX_FDM_CONTINUATION;
21500085111SLeonidas S. Barbosa }
21600085111SLeonidas S. Barbosa
217fc482a86SKent Yoder NX_CPB_FDM(csbcpb) &= ~NX_FDM_INTERMEDIATE;
218fc482a86SKent Yoder
219fc482a86SKent Yoder count0 = sctx->count[0] * 8;
220fc482a86SKent Yoder
22100085111SLeonidas S. Barbosa csbcpb->cpb.sha512.message_bit_length_lo = count0;
222fc482a86SKent Yoder
22300085111SLeonidas S. Barbosa len = sctx->count[0] & (SHA512_BLOCK_SIZE - 1);
22410d87b73SLeonidas Da Silva Barbosa in_sg = nx_build_sg_list(nx_ctx->in_sg, sctx->buf, &len,
22510d87b73SLeonidas Da Silva Barbosa max_sg_len);
22600085111SLeonidas S. Barbosa
22710d87b73SLeonidas Da Silva Barbosa if (len != (sctx->count[0] & (SHA512_BLOCK_SIZE - 1))) {
22810d87b73SLeonidas Da Silva Barbosa rc = -EINVAL;
22900085111SLeonidas S. Barbosa goto out;
23010d87b73SLeonidas Da Silva Barbosa }
23100085111SLeonidas S. Barbosa
23200085111SLeonidas S. Barbosa len = SHA512_DIGEST_SIZE;
23310d87b73SLeonidas Da Silva Barbosa out_sg = nx_build_sg_list(nx_ctx->out_sg, out, &len,
23410d87b73SLeonidas Da Silva Barbosa max_sg_len);
23500085111SLeonidas S. Barbosa
23610d87b73SLeonidas Da Silva Barbosa nx_ctx->op.inlen = (nx_ctx->in_sg - in_sg) * sizeof(struct nx_sg);
23710d87b73SLeonidas Da Silva Barbosa nx_ctx->op.outlen = (nx_ctx->out_sg - out_sg) * sizeof(struct nx_sg);
238fc482a86SKent Yoder
239fc482a86SKent Yoder if (!nx_ctx->op.outlen) {
240fc482a86SKent Yoder rc = -EINVAL;
241fc482a86SKent Yoder goto out;
242fc482a86SKent Yoder }
243fc482a86SKent Yoder
24475f22228SEric Biggers rc = nx_hcall_sync(nx_ctx, &nx_ctx->op, 0);
245fc482a86SKent Yoder if (rc)
246fc482a86SKent Yoder goto out;
247fc482a86SKent Yoder
248fc482a86SKent Yoder atomic_inc(&(nx_ctx->stats->sha512_ops));
24900085111SLeonidas S. Barbosa atomic64_add(sctx->count[0], &(nx_ctx->stats->sha512_bytes));
250fc482a86SKent Yoder
251fc482a86SKent Yoder memcpy(out, csbcpb->cpb.sha512.message_digest, SHA512_DIGEST_SIZE);
252fc482a86SKent Yoder out:
253c849163bSMarcelo Cerri spin_unlock_irqrestore(&nx_ctx->lock, irq_flags);
254fc482a86SKent Yoder return rc;
255fc482a86SKent Yoder }
256fc482a86SKent Yoder
nx_sha512_export(struct shash_desc * desc,void * out)257fc482a86SKent Yoder static int nx_sha512_export(struct shash_desc *desc, void *out)
258fc482a86SKent Yoder {
259*b20d9a73SHerbert Xu struct sha512_state_be *sctx = shash_desc_ctx(desc);
260c849163bSMarcelo Cerri
26100085111SLeonidas S. Barbosa memcpy(out, sctx, sizeof(*sctx));
262fc482a86SKent Yoder
263fc482a86SKent Yoder return 0;
264fc482a86SKent Yoder }
265fc482a86SKent Yoder
nx_sha512_import(struct shash_desc * desc,const void * in)266fc482a86SKent Yoder static int nx_sha512_import(struct shash_desc *desc, const void *in)
267fc482a86SKent Yoder {
268*b20d9a73SHerbert Xu struct sha512_state_be *sctx = shash_desc_ctx(desc);
269c849163bSMarcelo Cerri
27000085111SLeonidas S. Barbosa memcpy(sctx, in, sizeof(*sctx));
271fc482a86SKent Yoder
272fc482a86SKent Yoder return 0;
273fc482a86SKent Yoder }
274fc482a86SKent Yoder
275fc482a86SKent Yoder struct shash_alg nx_shash_sha512_alg = {
276fc482a86SKent Yoder .digestsize = SHA512_DIGEST_SIZE,
277fc482a86SKent Yoder .init = nx_sha512_init,
278fc482a86SKent Yoder .update = nx_sha512_update,
279fc482a86SKent Yoder .final = nx_sha512_final,
280fc482a86SKent Yoder .export = nx_sha512_export,
281fc482a86SKent Yoder .import = nx_sha512_import,
282*b20d9a73SHerbert Xu .descsize = sizeof(struct sha512_state_be),
283*b20d9a73SHerbert Xu .statesize = sizeof(struct sha512_state_be),
284fc482a86SKent Yoder .base = {
285fc482a86SKent Yoder .cra_name = "sha512",
286fc482a86SKent Yoder .cra_driver_name = "sha512-nx",
287fc482a86SKent Yoder .cra_priority = 300,
288fc482a86SKent Yoder .cra_blocksize = SHA512_BLOCK_SIZE,
289fc482a86SKent Yoder .cra_module = THIS_MODULE,
290fc482a86SKent Yoder .cra_ctxsize = sizeof(struct nx_crypto_ctx),
291030f4e96SHerbert Xu .cra_init = nx_crypto_ctx_sha512_init,
292fc482a86SKent Yoder .cra_exit = nx_crypto_ctx_exit,
293fc482a86SKent Yoder }
294fc482a86SKent Yoder };
295