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2024-01-31 f70575805708cabdedea7498aaa3f710fde4d920 
 kernel/drivers/crypto/amcc/crypto4xx_core.c
....@@ -1,18 +1,9 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /**
23  * AMCC SoC PPC4xx Crypto Driver
34  *
45  * Copyright (c) 2008 Applied Micro Circuits Corporation.
56  * All rights reserved. James Hsiao <jhsiao@amcc.com>
6
- *
7
- * This program is free software; you can redistribute it and/or modify
8
- * it under the terms of the GNU General Public License as published by
9
- * the Free Software Foundation; either version 2 of the License, or
10
- * (at your option) any later version.
11
- *
12
- * This program is distributed in the hope that it will be useful,
13
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
14
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15
- * GNU General Public License for more details.
167  *
178  * This file implements AMCC crypto offload Linux device driver for use with
189  * Linux CryptoAPI.
....@@ -40,9 +31,11 @@
4031 #include <crypto/ctr.h>
4132 #include <crypto/gcm.h>
4233 #include <crypto/sha.h>
34
+#include <crypto/rng.h>
4335 #include <crypto/scatterwalk.h>
4436 #include <crypto/skcipher.h>
4537 #include <crypto/internal/aead.h>
38
+#include <crypto/internal/rng.h>
4639 #include <crypto/internal/skcipher.h>
4740 #include "crypto4xx_reg_def.h"
4841 #include "crypto4xx_core.h"
....@@ -176,7 +169,7 @@
176169 	int i;
177170 	dev->pdr = dma_alloc_coherent(dev->core_dev->device,
178171 				      sizeof(struct ce_pd) * PPC4XX_NUM_PD,
179
-				      &dev->pdr_pa, GFP_ATOMIC);
172
+				      &dev->pdr_pa, GFP_KERNEL);
180173 	if (!dev->pdr)
181174 		return -ENOMEM;
182175 
....@@ -189,17 +182,16 @@
189182 				  dev->pdr_pa);
190183 		return -ENOMEM;
191184 	}
192
-	memset(dev->pdr, 0, sizeof(struct ce_pd) * PPC4XX_NUM_PD);
193185 	dev->shadow_sa_pool = dma_alloc_coherent(dev->core_dev->device,
194186 				   sizeof(union shadow_sa_buf) * PPC4XX_NUM_PD,
195187 				   &dev->shadow_sa_pool_pa,
196
-				   GFP_ATOMIC);
188
+				   GFP_KERNEL);
197189 	if (!dev->shadow_sa_pool)
198190 		return -ENOMEM;
199191 
200192 	dev->shadow_sr_pool = dma_alloc_coherent(dev->core_dev->device,
201193 			 sizeof(struct sa_state_record) * PPC4XX_NUM_PD,
202
-			 &dev->shadow_sr_pool_pa, GFP_ATOMIC);
194
+			 &dev->shadow_sr_pool_pa, GFP_KERNEL);
203195 	if (!dev->shadow_sr_pool)
204196 		return -ENOMEM;
205197 	for (i = 0; i < PPC4XX_NUM_PD; i++) {
....@@ -283,9 +275,9 @@
283275  */
284276 static u32 crypto4xx_build_gdr(struct crypto4xx_device *dev)
285277 {
286
-	dev->gdr = dma_zalloc_coherent(dev->core_dev->device,
287
-				       sizeof(struct ce_gd) * PPC4XX_NUM_GD,
288
-				       &dev->gdr_pa, GFP_ATOMIC);
278
+	dev->gdr = dma_alloc_coherent(dev->core_dev->device,
279
+				      sizeof(struct ce_gd) * PPC4XX_NUM_GD,
280
+				      &dev->gdr_pa, GFP_KERNEL);
289281 	if (!dev->gdr)
290282 		return -ENOMEM;
291283 
....@@ -294,7 +286,8 @@
294286 
295287 static inline void crypto4xx_destroy_gdr(struct crypto4xx_device *dev)
296288 {
297
-	dma_free_coherent(dev->core_dev->device,
289
+	if (dev->gdr)
290
+		dma_free_coherent(dev->core_dev->device,
298291 			  sizeof(struct ce_gd) * PPC4XX_NUM_GD,
299292 			  dev->gdr, dev->gdr_pa);
300293 }
....@@ -362,18 +355,18 @@
362355 {
363356 	int i;
364357 
365
-	/* alloc memory for scatter descriptor ring */
366
-	dev->sdr = dma_alloc_coherent(dev->core_dev->device,
367
-				      sizeof(struct ce_sd) * PPC4XX_NUM_SD,
368
-				      &dev->sdr_pa, GFP_ATOMIC);
369
-	if (!dev->sdr)
370
-		return -ENOMEM;
371
-
372358 	dev->scatter_buffer_va =
373359 		dma_alloc_coherent(dev->core_dev->device,
374360 			PPC4XX_SD_BUFFER_SIZE * PPC4XX_NUM_SD,
375
-			&dev->scatter_buffer_pa, GFP_ATOMIC);
361
+			&dev->scatter_buffer_pa, GFP_KERNEL);
376362 	if (!dev->scatter_buffer_va)
363
+		return -ENOMEM;
364
+
365
+	/* alloc memory for scatter descriptor ring */
366
+	dev->sdr = dma_alloc_coherent(dev->core_dev->device,
367
+				      sizeof(struct ce_sd) * PPC4XX_NUM_SD,
368
+				      &dev->sdr_pa, GFP_KERNEL);
369
+	if (!dev->sdr)
377370 		return -ENOMEM;
378371 
379372 	for (i = 0; i < PPC4XX_NUM_SD; i++) {
....@@ -529,17 +522,16 @@
529522 {
530523 	struct skcipher_request *req;
531524 	struct scatterlist *dst;
532
-	dma_addr_t addr;
533525 
534526 	req = skcipher_request_cast(pd_uinfo->async_req);
535527 
536
-	if (pd_uinfo->using_sd) {
528
+	if (pd_uinfo->sa_va->sa_command_0.bf.scatter) {
537529 		crypto4xx_copy_pkt_to_dst(dev, pd, pd_uinfo,
538530 					  req->cryptlen, req->dst);
539531 	} else {
540532 		dst = pd_uinfo->dest_va;
541
-		addr = dma_map_page(dev->core_dev->device, sg_page(dst),
542
-				    dst->offset, dst->length, DMA_FROM_DEVICE);
533
+		dma_unmap_page(dev->core_dev->device, pd->dest, dst->length,
534
+			       DMA_FROM_DEVICE);
543535 	}
544536 
545537 	if (pd_uinfo->sa_va->sa_command_0.bf.save_iv == SA_SAVE_IV) {
....@@ -564,10 +556,9 @@
564556 	struct ahash_request *ahash_req;
565557 
566558 	ahash_req = ahash_request_cast(pd_uinfo->async_req);
567
-	ctx  = crypto_tfm_ctx(ahash_req->base.tfm);
559
+	ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(ahash_req));
568560 
569
-	crypto4xx_copy_digest_to_dst(ahash_req->result, pd_uinfo,
570
-				     crypto_tfm_ctx(ahash_req->base.tfm));
561
+	crypto4xx_copy_digest_to_dst(ahash_req->result, pd_uinfo, ctx);
571562 	crypto4xx_ret_sg_desc(dev, pd_uinfo);
572563 
573564 	if (pd_uinfo->state & PD_ENTRY_BUSY)
....@@ -587,12 +578,12 @@
587578 	u32 icv[AES_BLOCK_SIZE];
588579 	int err = 0;
589580 
590
-	if (pd_uinfo->using_sd) {
581
+	if (pd_uinfo->sa_va->sa_command_0.bf.scatter) {
591582 		crypto4xx_copy_pkt_to_dst(dev, pd, pd_uinfo,
592583 					  pd->pd_ctl_len.bf.pkt_len,
593584 					  dst);
594585 	} else {
595
-		__dma_sync_page(sg_page(dst), dst->offset, dst->length,
586
+		dma_unmap_page(dev->core_dev->device, pd->dest, dst->length,
596587 				DMA_FROM_DEVICE);
597588 	}
598589 
....@@ -881,7 +872,6 @@
881872 		 * we know application give us dst a whole piece of memory
882873 		 * no need to use scatter ring.
883874 		 */
884
-		pd_uinfo->using_sd = 0;
885875 		pd_uinfo->first_sd = 0xffffffff;
886876 		sa->sa_command_0.bf.scatter = 0;
887877 		pd->dest = (u32)dma_map_page(dev->core_dev->device,
....@@ -895,7 +885,6 @@
895885 		u32 sd_idx = fst_sd;
896886 		nbytes = datalen;
897887 		sa->sa_command_0.bf.scatter = 1;
898
-		pd_uinfo->using_sd = 1;
899888 		pd_uinfo->first_sd = fst_sd;
900889 		sd = crypto4xx_get_sdp(dev, &sd_dma, sd_idx);
901890 		pd->dest = sd_dma;
....@@ -959,15 +948,10 @@
959948 
960949 	if (alg->base.cra_flags & CRYPTO_ALG_NEED_FALLBACK) {
961950 		ctx->sw_cipher.cipher =
962
-			crypto_alloc_skcipher(alg->base.cra_name, 0,
963
-					      CRYPTO_ALG_NEED_FALLBACK |
964
-					      CRYPTO_ALG_ASYNC);
951
+			crypto_alloc_sync_skcipher(alg->base.cra_name, 0,
952
+					      CRYPTO_ALG_NEED_FALLBACK);
965953 		if (IS_ERR(ctx->sw_cipher.cipher))
966954 			return PTR_ERR(ctx->sw_cipher.cipher);
967
-
968
-		crypto_skcipher_set_reqsize(sk,
969
-			sizeof(struct skcipher_request) + 32 +
970
-			crypto_skcipher_reqsize(ctx->sw_cipher.cipher));
971955 	}
972956 
973957 	amcc_alg = container_of(alg, struct crypto4xx_alg, alg.u.cipher);
....@@ -986,7 +970,7 @@
986970 
987971 	crypto4xx_common_exit(ctx);
988972 	if (ctx->sw_cipher.cipher)
989
-		crypto_free_skcipher(ctx->sw_cipher.cipher);
973
+		crypto_free_sync_skcipher(ctx->sw_cipher.cipher);
990974 }
991975 
992976 static int crypto4xx_aead_init(struct crypto_aead *tfm)
....@@ -1042,6 +1026,10 @@
10421026 			rc = crypto_register_ahash(&alg->alg.u.hash);
10431027 			break;
10441028 
1029
+		case CRYPTO_ALG_TYPE_RNG:
1030
+			rc = crypto_register_rng(&alg->alg.u.rng);
1031
+			break;
1032
+
10451033 		default:
10461034 			rc = crypto_register_skcipher(&alg->alg.u.cipher);
10471035 			break;
....@@ -1069,6 +1057,10 @@
10691057 
10701058 		case CRYPTO_ALG_TYPE_AEAD:
10711059 			crypto_unregister_aead(&alg->alg.u.aead);
1060
+			break;
1061
+
1062
+		case CRYPTO_ALG_TYPE_RNG:
1063
+			crypto_unregister_rng(&alg->alg.u.rng);
10721064 			break;
10731065 
10741066 		default:
....@@ -1129,6 +1121,69 @@
11291121 		PPC4XX_TMO_ERR_INT);
11301122 }
11311123 
1124
+static int ppc4xx_prng_data_read(struct crypto4xx_device *dev,
1125
+				 u8 *data, unsigned int max)
1126
+{
1127
+	unsigned int i, curr = 0;
1128
+	u32 val[2];
1129
+
1130
+	do {
1131
+		/* trigger PRN generation */
1132
+		writel(PPC4XX_PRNG_CTRL_AUTO_EN,
1133
+		       dev->ce_base + CRYPTO4XX_PRNG_CTRL);
1134
+
1135
+		for (i = 0; i < 1024; i++) {
1136
+			/* usually 19 iterations are enough */
1137
+			if ((readl(dev->ce_base + CRYPTO4XX_PRNG_STAT) &
1138
+			     CRYPTO4XX_PRNG_STAT_BUSY))
1139
+				continue;
1140
+
1141
+			val[0] = readl_be(dev->ce_base + CRYPTO4XX_PRNG_RES_0);
1142
+			val[1] = readl_be(dev->ce_base + CRYPTO4XX_PRNG_RES_1);
1143
+			break;
1144
+		}
1145
+		if (i == 1024)
1146
+			return -ETIMEDOUT;
1147
+
1148
+		if ((max - curr) >= 8) {
1149
+			memcpy(data, &val, 8);
1150
+			data += 8;
1151
+			curr += 8;
1152
+		} else {
1153
+			/* copy only remaining bytes */
1154
+			memcpy(data, &val, max - curr);
1155
+			break;
1156
+		}
1157
+	} while (curr < max);
1158
+
1159
+	return curr;
1160
+}
1161
+
1162
+static int crypto4xx_prng_generate(struct crypto_rng *tfm,
1163
+				   const u8 *src, unsigned int slen,
1164
+				   u8 *dstn, unsigned int dlen)
1165
+{
1166
+	struct rng_alg *alg = crypto_rng_alg(tfm);
1167
+	struct crypto4xx_alg *amcc_alg;
1168
+	struct crypto4xx_device *dev;
1169
+	int ret;
1170
+
1171
+	amcc_alg = container_of(alg, struct crypto4xx_alg, alg.u.rng);
1172
+	dev = amcc_alg->dev;
1173
+
1174
+	mutex_lock(&dev->core_dev->rng_lock);
1175
+	ret = ppc4xx_prng_data_read(dev, dstn, dlen);
1176
+	mutex_unlock(&dev->core_dev->rng_lock);
1177
+	return ret;
1178
+}
1179
+
1180
+
1181
+static int crypto4xx_prng_seed(struct crypto_rng *tfm, const u8 *seed,
1182
+			unsigned int slen)
1183
+{
1184
+	return 0;
1185
+}
1186
+
11321187 /**
11331188  * Supported Crypto Algorithms
11341189  */
....@@ -1161,7 +1216,7 @@
11611216 			.cra_priority = CRYPTO4XX_CRYPTO_PRIORITY,
11621217 			.cra_flags = CRYPTO_ALG_ASYNC |
11631218 				CRYPTO_ALG_KERN_DRIVER_ONLY,
1164
-			.cra_blocksize = AES_BLOCK_SIZE,
1219
+			.cra_blocksize = 1,
11651220 			.cra_ctxsize = sizeof(struct crypto4xx_ctx),
11661221 			.cra_module = THIS_MODULE,
11671222 		},
....@@ -1222,7 +1277,7 @@
12221277 			.cra_priority = CRYPTO4XX_CRYPTO_PRIORITY,
12231278 			.cra_flags = CRYPTO_ALG_ASYNC |
12241279 				CRYPTO_ALG_KERN_DRIVER_ONLY,
1225
-			.cra_blocksize = 1,
1280
+			.cra_blocksize = AES_BLOCK_SIZE,
12261281 			.cra_ctxsize = sizeof(struct crypto4xx_ctx),
12271282 			.cra_module = THIS_MODULE,
12281283 		},
....@@ -1298,6 +1353,18 @@
12981353 			.cra_module	= THIS_MODULE,
12991354 		},
13001355 	} },
1356
+	{ .type = CRYPTO_ALG_TYPE_RNG, .u.rng = {
1357
+		.base = {
1358
+			.cra_name		= "stdrng",
1359
+			.cra_driver_name        = "crypto4xx_rng",
1360
+			.cra_priority		= 300,
1361
+			.cra_ctxsize		= 0,
1362
+			.cra_module		= THIS_MODULE,
1363
+		},
1364
+		.generate               = crypto4xx_prng_generate,
1365
+		.seed                   = crypto4xx_prng_seed,
1366
+		.seedsize               = 0,
1367
+	} },
13011368 };
13021369 
13031370 /**
....@@ -1367,18 +1434,18 @@
13671434 	core_dev->dev->core_dev = core_dev;
13681435 	core_dev->dev->is_revb = is_revb;
13691436 	core_dev->device = dev;
1437
+	mutex_init(&core_dev->rng_lock);
13701438 	spin_lock_init(&core_dev->lock);
13711439 	INIT_LIST_HEAD(&core_dev->dev->alg_list);
13721440 	ratelimit_default_init(&core_dev->dev->aead_ratelimit);
1441
+	rc = crypto4xx_build_sdr(core_dev->dev);
1442
+	if (rc)
1443
+		goto err_build_sdr;
13731444 	rc = crypto4xx_build_pdr(core_dev->dev);
13741445 	if (rc)
1375
-		goto err_build_pdr;
1446
+		goto err_build_sdr;
13761447 
13771448 	rc = crypto4xx_build_gdr(core_dev->dev);
1378
-	if (rc)
1379
-		goto err_build_pdr;
1380
-
1381
-	rc = crypto4xx_build_sdr(core_dev->dev);
13821449 	if (rc)
13831450 		goto err_build_sdr;
13841451 
....@@ -1424,7 +1491,6 @@
14241491 err_build_sdr:
14251492 	crypto4xx_destroy_sdr(core_dev->dev);
14261493 	crypto4xx_destroy_gdr(core_dev->dev);
1427
-err_build_pdr:
14281494 	crypto4xx_destroy_pdr(core_dev->dev);
14291495 	kfree(core_dev->dev);
14301496 err_alloc_dev:
....@@ -1446,6 +1512,7 @@
14461512 	tasklet_kill(&core_dev->tasklet);
14471513 	/* Un-register with Linux CryptoAPI */
14481514 	crypto4xx_unregister_alg(core_dev->dev);
1515
+	mutex_destroy(&core_dev->rng_lock);
14491516 	/* Free all allocated memory */
14501517 	crypto4xx_stop_all(core_dev);
14511518