Wire up support for Triple DES in ECB mode.
Signed-off-by: Gary R Hook <gary.hook@xxxxxxx>
---
drivers/crypto/ccp/Makefile | 1
drivers/crypto/ccp/ccp-crypto-des3.c | 254 ++++++++++++++++++++++++++++++++++
drivers/crypto/ccp/ccp-crypto-main.c | 10 +
drivers/crypto/ccp/ccp-crypto.h | 22 +++
drivers/crypto/ccp/ccp-dev-v3.c | 1
drivers/crypto/ccp/ccp-dev-v5.c | 54 +++++++
drivers/crypto/ccp/ccp-dev.h | 14 ++
drivers/crypto/ccp/ccp-ops.c | 198 +++++++++++++++++++++++++++
include/linux/ccp.h | 57 +++++++-
9 files changed, 608 insertions(+), 3 deletions(-)
create mode 100644 drivers/crypto/ccp/ccp-crypto-des3.c
diff --git a/drivers/crypto/ccp/Makefile b/drivers/crypto/ccp/Makefile
index fd77225..563594a 100644
--- a/drivers/crypto/ccp/Makefile
+++ b/drivers/crypto/ccp/Makefile
@@ -14,4 +14,5 @@ ccp-crypto-objs := ccp-crypto-main.o \
ccp-crypto-aes-xts.o \
ccp-crypto-rsa.o \
ccp-crypto-aes-galois.o \
+ ccp-crypto-des3.o \
ccp-crypto-sha.o
diff --git a/drivers/crypto/ccp/ccp-crypto-des3.c b/drivers/crypto/ccp/ccp-crypto-des3.c
new file mode 100644
index 0000000..5af7347
--- /dev/null
+++ b/drivers/crypto/ccp/ccp-crypto-des3.c
@@ -0,0 +1,254 @@
+/*
+ * AMD Cryptographic Coprocessor (CCP) DES3 crypto API support
+ *
+ * Copyright (C) 2016 Advanced Micro Devices, Inc.
+ *
+ * Author: Gary R Hook <ghook@xxxxxxx>
+ *
+ * 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/module.h>
+#include <linux/sched.h>
+#include <linux/delay.h>
+#include <linux/scatterlist.h>
+#include <linux/crypto.h>
+#include <crypto/algapi.h>
+#include <crypto/scatterwalk.h>
+#include <crypto/des.h>
+
+#include "ccp-crypto.h"
+
+static int ccp_des3_complete(struct crypto_async_request *async_req, int ret)
+{
+ struct ablkcipher_request *req = ablkcipher_request_cast(async_req);
+ struct ccp_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
+ struct ccp_des3_req_ctx *rctx = ablkcipher_request_ctx(req);
+
+ if (ret)
+ return ret;
+
+ if (ctx->u.des3.mode != CCP_DES3_MODE_ECB)
+ memcpy(req->info, rctx->iv, DES3_EDE_BLOCK_SIZE);
+
+ return 0;
+}
+
+static int ccp_des3_setkey(struct crypto_ablkcipher *tfm, const u8 *key,
+ unsigned int key_len)
+{
+ struct ccp_ctx *ctx = crypto_tfm_ctx(crypto_ablkcipher_tfm(tfm));
+ struct ccp_crypto_ablkcipher_alg *alg =
+ ccp_crypto_ablkcipher_alg(crypto_ablkcipher_tfm(tfm));
+ u32 *flags = &tfm->base.crt_flags;
+
+
+ /* From des_generic.c:
+ *
+ * RFC2451:
+ * If the first two or last two independent 64-bit keys are
+ * equal (k1 == k2 or k2 == k3), then the DES3 operation is simply the
+ * same as DES. Implementers MUST reject keys that exhibit this
+ * property.
+ */
+ const u32 *K = (const u32 *)key;
+
+ if (unlikely(!((K[0] ^ K[2]) | (K[1] ^ K[3])) ||
+ !((K[2] ^ K[4]) | (K[3] ^ K[5]))) &&
+ (*flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
+ *flags |= CRYPTO_TFM_RES_WEAK_KEY;
+ return -EINVAL;
+ }
+
+ /* It's not clear that there is any support for a keysize of 112.
+ * If needed, the caller should make K1 == K3
+ */
+ ctx->u.des3.type = CCP_DES3_TYPE_168;
+ ctx->u.des3.mode = alg->mode;
+ ctx->u.des3.key_len = key_len;
+
+ memcpy(ctx->u.des3.key, key, key_len);
+ sg_init_one(&ctx->u.des3.key_sg, ctx->u.des3.key, key_len);
+
+ return 0;
+}
+
+static int ccp_des3_crypt(struct ablkcipher_request *req, bool encrypt)
+{
+ struct ccp_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
+ struct ccp_des3_req_ctx *rctx = ablkcipher_request_ctx(req);
+ struct scatterlist *iv_sg = NULL;
+ unsigned int iv_len = 0;
+ int ret;
+
+ if (!ctx->u.des3.key_len)
+ return -EINVAL;
+
+ if (((ctx->u.des3.mode == CCP_DES3_MODE_ECB) ||
+ (ctx->u.des3.mode == CCP_DES3_MODE_CBC)) &&
+ (req->nbytes & (DES3_EDE_BLOCK_SIZE - 1)))
+ return -EINVAL;
+
+ if (ctx->u.des3.mode != CCP_DES3_MODE_ECB) {
+ if (!req->info)
+ return -EINVAL;
+
+ memcpy(rctx->iv, req->info, DES3_EDE_BLOCK_SIZE);
+ iv_sg = &rctx->iv_sg;
+ iv_len = DES3_EDE_BLOCK_SIZE;
+ sg_init_one(iv_sg, rctx->iv, iv_len);
+ }
+
+ memset(&rctx->cmd, 0, sizeof(rctx->cmd));
+ INIT_LIST_HEAD(&rctx->cmd.entry);
+ rctx->cmd.engine = CCP_ENGINE_DES3;
+ rctx->cmd.u.des3.type = ctx->u.des3.type;
+ rctx->cmd.u.des3.mode = ctx->u.des3.mode;
+ rctx->cmd.u.des3.action = (encrypt)
+ ? CCP_DES3_ACTION_ENCRYPT
+ : CCP_DES3_ACTION_DECRYPT;
+ rctx->cmd.u.des3.key = &ctx->u.des3.key_sg;
+ rctx->cmd.u.des3.key_len = ctx->u.des3.key_len;
+ rctx->cmd.u.des3.iv = iv_sg;
+ rctx->cmd.u.des3.iv_len = iv_len;
+ rctx->cmd.u.des3.src = req->src;
+ rctx->cmd.u.des3.src_len = req->nbytes;
+ rctx->cmd.u.des3.dst = req->dst;
+
+ ret = ccp_crypto_enqueue_request(&req->base, &rctx->cmd);
+
+ return ret;
+}
+
+static int ccp_des3_encrypt(struct ablkcipher_request *req)
+{
+ return ccp_des3_crypt(req, true);
+}
+
+static int ccp_des3_decrypt(struct ablkcipher_request *req)
+{
+ return ccp_des3_crypt(req, false);
+}
+
+static int ccp_des3_cra_init(struct crypto_tfm *tfm)
+{
+ struct ccp_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ ctx->complete = ccp_des3_complete;
+ ctx->u.des3.key_len = 0;
+
+ tfm->crt_ablkcipher.reqsize = sizeof(struct ccp_des3_req_ctx);
+
+ return 0;
+}
+
+static void ccp_des3_cra_exit(struct crypto_tfm *tfm)
+{
+}
+
+static struct crypto_alg ccp_des3_defaults = {
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
+ CRYPTO_ALG_ASYNC |
+ CRYPTO_ALG_KERN_DRIVER_ONLY |
+ CRYPTO_ALG_NEED_FALLBACK,
+ .cra_blocksize = DES3_EDE_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct ccp_ctx),
+ .cra_priority = CCP_CRA_PRIORITY,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_init = ccp_des3_cra_init,
+ .cra_exit = ccp_des3_cra_exit,
+ .cra_module = THIS_MODULE,
+ .cra_ablkcipher = {
+ .setkey = ccp_des3_setkey,
+ .encrypt = ccp_des3_encrypt,
+ .decrypt = ccp_des3_decrypt,
+ .min_keysize = DES3_EDE_KEY_SIZE,
+ .max_keysize = DES3_EDE_KEY_SIZE,
+ },
+};
+
+struct ccp_des3_def {
+ enum ccp_des3_mode mode;
+ unsigned int version;
+ const char *name;
+ const char *driver_name;
+ unsigned int blocksize;
+ unsigned int ivsize;
+ struct crypto_alg *alg_defaults;
+};
+
+static struct ccp_des3_def des3_algs[] = {
+ {
+ .mode = CCP_DES3_MODE_ECB,
+ .version = CCP_VERSION(5, 0),
+ .name = "ecb(des3_ede)",
+ .driver_name = "ecb-des3-ccp",
+ .blocksize = DES3_EDE_BLOCK_SIZE,
+ .ivsize = 0,
+ .alg_defaults = &ccp_des3_defaults,
+ },
+ {
+ .mode = CCP_DES3_MODE_CBC,
+ .version = CCP_VERSION(5, 0),
+ .name = "cbc(des3_ede)",
+ .driver_name = "cbc-des3-ccp",
+ .blocksize = DES3_EDE_BLOCK_SIZE,
+ .ivsize = DES3_EDE_BLOCK_SIZE,
+ .alg_defaults = &ccp_des3_defaults,
+ },
+};
+
+static int ccp_register_des3_alg(struct list_head *head,
+ const struct ccp_des3_def *def)
+{
+ struct ccp_crypto_ablkcipher_alg *ccp_alg;
+ struct crypto_alg *alg;
+ int ret;
+
+ ccp_alg = kzalloc(sizeof(*ccp_alg), GFP_KERNEL);
+ if (!ccp_alg)
+ return -ENOMEM;
+
+ INIT_LIST_HEAD(&ccp_alg->entry);
+
+ ccp_alg->mode = def->mode;
+
+ /* Copy the defaults and override as necessary */
+ alg = &ccp_alg->alg;
+ *alg = *def->alg_defaults;
+ snprintf(alg->cra_name, CRYPTO_MAX_ALG_NAME, "%s", def->name);
+ snprintf(alg->cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s",
+ def->driver_name);
+ alg->cra_blocksize = def->blocksize;
+ alg->cra_ablkcipher.ivsize = def->ivsize;
+
+ ret = crypto_register_alg(alg);
+ if (ret) {
+ pr_err("%s ablkcipher algorithm registration error (%d)\n",
+ alg->cra_name, ret);
+ kfree(ccp_alg);
+ return ret;
+ }
+
+ list_add(&ccp_alg->entry, head);
+
+ return 0;
+}
+
+int ccp_register_des3_algs(struct list_head *head)
+{
+ int i, ret;
+ unsigned int ccpversion = ccp_version();
+
+ for (i = 0; i < ARRAY_SIZE(des3_algs); i++) {
+ if (des3_algs[i].version > ccpversion)
+ continue;
+ ret = ccp_register_des3_alg(head, &des3_algs[i]);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
diff --git a/drivers/crypto/ccp/ccp-crypto-main.c b/drivers/crypto/ccp/ccp-crypto-main.c
index 64e8cfa..228210c 100644
--- a/drivers/crypto/ccp/ccp-crypto-main.c
+++ b/drivers/crypto/ccp/ccp-crypto-main.c
@@ -33,6 +33,10 @@
module_param(sha_disable, uint, 0444);
MODULE_PARM_DESC(sha_disable, "Disable use of SHA - any non-zero value");
+static unsigned int des3_disable;
+module_param(des3_disable, uint, 0444);
+MODULE_PARM_DESC(des3_disable, "Disable use of 3DES - any non-zero value");
+
/* List heads for the supported algorithms */
static LIST_HEAD(hash_algs);
static LIST_HEAD(cipher_algs);
@@ -343,6 +347,12 @@ static int ccp_register_algs(void)
return ret;
}
+ if (!des3_disable) {
+ ret = ccp_register_des3_algs(&cipher_algs);
+ if (ret)
+ return ret;
+ }
+
if (!sha_disable) {
ret = ccp_register_sha_algs(&hash_algs);
if (ret)
diff --git a/drivers/crypto/ccp/ccp-crypto.h b/drivers/crypto/ccp/ccp-crypto.h
index 34da62d..dd5bf15 100644
--- a/drivers/crypto/ccp/ccp-crypto.h
+++ b/drivers/crypto/ccp/ccp-crypto.h
@@ -25,6 +25,8 @@
#include <crypto/hash.h>
#include <crypto/sha.h>
+#define CCP_LOG_LEVEL KERN_INFO
+
#define CCP_CRA_PRIORITY 300
struct ccp_crypto_ablkcipher_alg {
@@ -150,6 +152,24 @@ struct ccp_aes_cmac_exp_ctx {
u8 buf[AES_BLOCK_SIZE];
};
+/***** 3DES related defines *****/
+struct ccp_des3_ctx {
+ enum ccp_engine engine;
+ enum ccp_des3_type type;
+ enum ccp_des3_mode mode;
+
+ struct scatterlist key_sg;
+ unsigned int key_len;
+ u8 key[AES_MAX_KEY_SIZE];
+};
+
+struct ccp_des3_req_ctx {
+ struct scatterlist iv_sg;
+ u8 iv[AES_BLOCK_SIZE];
+
+ struct ccp_cmd cmd;
+};
+
/* SHA-related defines
* These values must be large enough to accommodate any variant
*/
@@ -214,6 +234,7 @@ struct ccp_ctx {
union {
struct ccp_aes_ctx aes;
struct ccp_sha_ctx sha;
+ struct ccp_des3_ctx des3;
} u;
};
@@ -227,5 +248,6 @@ struct scatterlist *ccp_crypto_sg_table_add(struct sg_table *table,
int ccp_register_aes_xts_algs(struct list_head *head);
int ccp_register_aes_aeads(struct list_head *head);
int ccp_register_sha_algs(struct list_head *head);
+int ccp_register_des3_algs(struct list_head *head);
#endif
diff --git a/drivers/crypto/ccp/ccp-dev-v3.c b/drivers/crypto/ccp/ccp-dev-v3.c
index 7bc0998..a3689a6 100644
--- a/drivers/crypto/ccp/ccp-dev-v3.c
+++ b/drivers/crypto/ccp/ccp-dev-v3.c
@@ -553,6 +553,7 @@ static irqreturn_t ccp_irq_handler(int irq, void *data)
static const struct ccp_actions ccp3_actions = {
.aes = ccp_perform_aes,
.xts_aes = ccp_perform_xts_aes,
+ .des3 = NULL,
.sha = ccp_perform_sha,
.rsa = ccp_perform_rsa,
.passthru = ccp_perform_passthru,
diff --git a/drivers/crypto/ccp/ccp-dev-v5.c b/drivers/crypto/ccp/ccp-dev-v5.c
index 41cc853..fc5666e 100644
--- a/drivers/crypto/ccp/ccp-dev-v5.c
+++ b/drivers/crypto/ccp/ccp-dev-v5.c
@@ -108,6 +108,12 @@ static void ccp_lsb_free(struct ccp_cmd_queue *cmd_q, unsigned int start,
u16 type:2;
} aes_xts;
struct {
+ u16 size:7;
+ u16 encrypt:1;
+ u16 mode:5;
+ u16 type:2;
+ } des3;
+ struct {
u16 rsvd1:10;
u16 type:4;
u16 rsvd2:1;
@@ -139,6 +145,10 @@ static void ccp_lsb_free(struct ccp_cmd_queue *cmd_q, unsigned int start,
#define CCP_AES_TYPE(p) ((p)->aes.type)
#define CCP_XTS_SIZE(p) ((p)->aes_xts.size)
#define CCP_XTS_ENCRYPT(p) ((p)->aes_xts.encrypt)
+#define CCP_DES3_SIZE(p) ((p)->des3.size)
+#define CCP_DES3_ENCRYPT(p) ((p)->des3.encrypt)
+#define CCP_DES3_MODE(p) ((p)->des3.mode)
+#define CCP_DES3_TYPE(p) ((p)->des3.type)
#define CCP_SHA_TYPE(p) ((p)->sha.type)
#define CCP_RSA_SIZE(p) ((p)->rsa.size)
#define CCP_PT_BYTESWAP(p) ((p)->pt.byteswap)
@@ -388,6 +398,47 @@ static int ccp5_perform_sha(struct ccp_op *op)
return ccp5_do_cmd(&desc, op->cmd_q);
}
+static int ccp5_perform_des3(struct ccp_op *op)
+{
+ struct ccp5_desc desc;
+ union ccp_function function;
+ u32 key_addr = op->sb_key * LSB_ITEM_SIZE;
+
+ /* Zero out all the fields of the command desc */
+ memset(&desc, 0, sizeof(struct ccp5_desc));
+
+ CCP5_CMD_ENGINE(&desc) = CCP_ENGINE_DES3;
+
+ CCP5_CMD_SOC(&desc) = op->soc;
+ CCP5_CMD_IOC(&desc) = 1;
+ CCP5_CMD_INIT(&desc) = op->init;
+ CCP5_CMD_EOM(&desc) = op->eom;
+ CCP5_CMD_PROT(&desc) = 0;
+
+ function.raw = 0;
+ CCP_DES3_ENCRYPT(&function) = op->u.des3.action;
+ CCP_DES3_MODE(&function) = op->u.des3.mode;
+ CCP_DES3_TYPE(&function) = op->u.des3.type;
+ CCP5_CMD_FUNCTION(&desc) = cpu_to_le32(function.raw);
+
+ CCP5_CMD_LEN(&desc) = cpu_to_le32(op->src.u.dma.length);
+
+ CCP5_CMD_SRC_LO(&desc) = cpu_to_le32(ccp_addr_lo(&op->src.u.dma));
+ CCP5_CMD_SRC_HI(&desc) = cpu_to_le32(ccp_addr_hi(&op->src.u.dma));
+ CCP5_CMD_SRC_MEM(&desc) = cpu_to_le32(CCP_MEMTYPE_SYSTEM);
+
+ CCP5_CMD_DST_LO(&desc) = cpu_to_le32(ccp_addr_lo(&op->dst.u.dma));
+ CCP5_CMD_DST_HI(&desc) = cpu_to_le32(ccp_addr_hi(&op->dst.u.dma));
+ CCP5_CMD_DST_MEM(&desc) = cpu_to_le32(CCP_MEMTYPE_SYSTEM);
+
+ CCP5_CMD_KEY_LO(&desc) = cpu_to_le32(lower_32_bits(key_addr));
+ CCP5_CMD_KEY_HI(&desc) = 0;
+ CCP5_CMD_KEY_MEM(&desc) = cpu_to_le32(CCP_MEMTYPE_SB);
+ CCP5_CMD_LSB_ID(&desc) = cpu_to_le32(op->sb_ctx);
+
+ return ccp5_do_cmd(&desc, op->cmd_q);
+}
+
static int ccp5_perform_rsa(struct ccp_op *op)
{
struct ccp5_desc desc;
@@ -435,6 +486,7 @@ static int ccp5_perform_passthru(struct ccp_op *op)
struct ccp_dma_info *saddr = &op->src.u.dma;
struct ccp_dma_info *daddr = &op->dst.u.dma;
+
memset(&desc, 0, Q_DESC_SIZE);
CCP5_CMD_ENGINE(&desc) = CCP_ENGINE_PASSTHRU;
@@ -729,6 +781,7 @@ static int ccp5_init(struct ccp_device *ccp)
dev_dbg(dev, "queue #%u available\n", i);
}
+
if (ccp->cmd_q_count == 0) {
dev_notice(dev, "no command queues available\n");
ret = -EIO;
@@ -994,6 +1047,7 @@ static void ccp5other_config(struct ccp_device *ccp)
.aes = ccp5_perform_aes,
.xts_aes = ccp5_perform_xts_aes,
.sha = ccp5_perform_sha,
+ .des3 = ccp5_perform_des3,
.rsa = ccp5_perform_rsa,
.passthru = ccp5_perform_passthru,
.ecc = ccp5_perform_ecc,
diff --git a/drivers/crypto/ccp/ccp-dev.h b/drivers/crypto/ccp/ccp-dev.h
index 2b5c01f..754e9c2 100644
--- a/drivers/crypto/ccp/ccp-dev.h
+++ b/drivers/crypto/ccp/ccp-dev.h
@@ -190,6 +190,9 @@
#define CCP_XTS_AES_KEY_SB_COUNT 1
#define CCP_XTS_AES_CTX_SB_COUNT 1
+#define CCP_DES3_KEY_SB_COUNT 1
+#define CCP_DES3_CTX_SB_COUNT 1
+
#define CCP_SHA_SB_COUNT 1
#define CCP_RSA_MAX_WIDTH 4096
@@ -475,6 +478,12 @@ struct ccp_xts_aes_op {
enum ccp_xts_aes_unit_size unit_size;
};
+struct ccp_des3_op {
+ enum ccp_des3_type type;
+ enum ccp_des3_mode mode;
+ enum ccp_des3_action action;
+};
+
struct ccp_sha_op {
enum ccp_sha_type type;
u64 msg_bits;
@@ -512,6 +521,7 @@ struct ccp_op {
union {
struct ccp_aes_op aes;
struct ccp_xts_aes_op xts;
+ struct ccp_des3_op des3;
struct ccp_sha_op sha;
struct ccp_rsa_op rsa;
struct ccp_passthru_op passthru;
@@ -620,13 +630,13 @@ struct ccp5_desc {
struct ccp_actions {
int (*aes)(struct ccp_op *);
int (*xts_aes)(struct ccp_op *);
+ int (*des3)(struct ccp_op *);
int (*sha)(struct ccp_op *);
int (*rsa)(struct ccp_op *);
int (*passthru)(struct ccp_op *);
int (*ecc)(struct ccp_op *);
u32 (*sballoc)(struct ccp_cmd_queue *, unsigned int);
- void (*sbfree)(struct ccp_cmd_queue *, unsigned int,
- unsigned int);
+ void (*sbfree)(struct ccp_cmd_queue *, unsigned int, unsigned int);
unsigned int (*get_free_slots)(struct ccp_cmd_queue *);
int (*init)(struct ccp_device *);
void (*destroy)(struct ccp_device *);
diff --git a/drivers/crypto/ccp/ccp-ops.c b/drivers/crypto/ccp/ccp-ops.c
index 2a55610..fdbbb1a 100644
--- a/drivers/crypto/ccp/ccp-ops.c
+++ b/drivers/crypto/ccp/ccp-ops.c
@@ -16,6 +16,7 @@
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <crypto/scatterwalk.h>
+#include <crypto/des.h>
#include <linux/ccp.h>
#include "ccp-dev.h"
@@ -1191,6 +1192,200 @@ static int ccp_run_xts_aes_cmd(struct ccp_cmd_queue *cmd_q,
return ret;
}
+static int ccp_run_des3_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd)
+{
+ struct ccp_des3_engine *des3 = &cmd->u.des3;
+
+ struct ccp_dm_workarea key, ctx;
+ struct ccp_data src, dst;
+ struct ccp_op op;
+ unsigned int dm_offset;
+ unsigned int len_singlekey;
+ bool in_place = false;
+ int ret;
+
+ /* Error checks */
+ if (!cmd_q->ccp->vdata->ccp_act->des3)
+ return -EINVAL;
+
+ if (des3->key_len != DES3_EDE_KEY_SIZE)
+ return -EINVAL;
+
+ if (((des3->mode == CCP_DES3_MODE_ECB) ||
+ (des3->mode == CCP_DES3_MODE_CBC)) &&
+ (des3->src_len & (DES3_EDE_BLOCK_SIZE - 1)))
+ return -EINVAL;
+
+ if (!des3->key || !des3->src || !des3->dst)
+ return -EINVAL;
+
+ if (des3->mode != CCP_DES3_MODE_ECB) {
+ if (des3->iv_len != DES3_EDE_BLOCK_SIZE)
+ return -EINVAL;
+
+ if (!des3->iv)
+ return -EINVAL;
+ }
+
+ ret = -EIO;
+ /* Zero out all the fields of the command desc */
+ memset(&op, 0, sizeof(op));
+
+ /* Set up the Function field */
+ op.cmd_q = cmd_q;
+ op.jobid = CCP_NEW_JOBID(cmd_q->ccp);
+ op.sb_key = cmd_q->sb_key;
+
+ op.init = (des3->mode == CCP_DES3_MODE_ECB) ? 0 : 1;
+ op.u.des3.type = des3->type;
+ op.u.des3.mode = des3->mode;
+ op.u.des3.action = des3->action;
+
+ /*
+ * All supported key sizes fit in a single (32-byte) KSB entry and
+ * (like AES) must be in little endian format. Use the 256-bit byte
+ * swap passthru option to convert from big endian to little endian.
+ */
+ ret = ccp_init_dm_workarea(&key, cmd_q,
+ CCP_DES3_KEY_SB_COUNT * CCP_SB_BYTES,
+ DMA_TO_DEVICE);
+ if (ret)
+ return ret;
+
+ /*
+ * The contents of the key triplet are in the reverse order of what
+ * is required by the engine. Copy the 3 pieces individually to put
+ * them where they belong.
+ */
+ dm_offset = CCP_SB_BYTES - des3->key_len; /* Basic offset */
+
+ len_singlekey = des3->key_len / 3;
+ ccp_set_dm_area(&key, dm_offset + 2 * len_singlekey,
+ des3->key, 0, len_singlekey);
+ ccp_set_dm_area(&key, dm_offset + len_singlekey,
+ des3->key, len_singlekey, len_singlekey);
+ ccp_set_dm_area(&key, dm_offset,
+ des3->key, 2 * len_singlekey, len_singlekey);
+
+ /* Copy the key to the SB */
+ ret = ccp_copy_to_sb(cmd_q, &key, op.jobid, op.sb_key,
+ CCP_PASSTHRU_BYTESWAP_256BIT);
+ if (ret) {
+ cmd->engine_error = cmd_q->cmd_error;
+ goto e_key;
+ }
+
+ /*
+ * The DES3 context fits in a single (32-byte) KSB entry and
+ * must be in little endian format. Use the 256-bit byte swap
+ * passthru option to convert from big endian to little endian.
+ */
+ if (des3->mode != CCP_DES3_MODE_ECB) {
+ u32 load_mode;
+
+ op.sb_ctx = cmd_q->sb_ctx;
+
+ ret = ccp_init_dm_workarea(&ctx, cmd_q,
+ CCP_DES3_CTX_SB_COUNT * CCP_SB_BYTES,
+ DMA_BIDIRECTIONAL);
+ if (ret)
+ goto e_key;
+
+ /* Load the context into the LSB */
+ dm_offset = CCP_SB_BYTES - des3->iv_len;
+ ccp_set_dm_area(&ctx, dm_offset, des3->iv, 0, des3->iv_len);
+
+ if (cmd_q->ccp->vdata->version == CCP_VERSION(3, 0))
+ load_mode = CCP_PASSTHRU_BYTESWAP_NOOP;
+ else
+ load_mode = CCP_PASSTHRU_BYTESWAP_256BIT;
+ ret = ccp_copy_to_sb(cmd_q, &ctx, op.jobid, op.sb_ctx,
+ load_mode);
+ if (ret) {
+ cmd->engine_error = cmd_q->cmd_error;
+ goto e_ctx;
+ }
+ }
+
+ /*
+ * Prepare the input and output data workareas. For in-place
+ * operations we need to set the dma direction to BIDIRECTIONAL
+ * and copy the src workarea to the dst workarea.
+ */
+ if (sg_virt(des3->src) == sg_virt(des3->dst))
+ in_place = true;
+
+ ret = ccp_init_data(&src, cmd_q, des3->src, des3->src_len,
+ DES3_EDE_BLOCK_SIZE,
+ in_place ? DMA_BIDIRECTIONAL : DMA_TO_DEVICE);
+ if (ret)
+ goto e_ctx;
+
+ if (in_place)
+ dst = src;
+ else {
+ ret = ccp_init_data(&dst, cmd_q, des3->dst, des3->src_len,
+ DES3_EDE_BLOCK_SIZE, DMA_FROM_DEVICE);
+ if (ret)
+ goto e_src;
+ }
+
+ /* Send data to the CCP DES3 engine */
+ while (src.sg_wa.bytes_left) {
+ ccp_prepare_data(&src, &dst, &op, DES3_EDE_BLOCK_SIZE, true);
+ if (!src.sg_wa.bytes_left) {
+ op.eom = 1;
+
+ /* Since we don't retrieve the context in ECB mode
+ * we have to wait for the operation to complete
+ * on the last piece of data
+ */
+ op.soc = 0;
+ }
+
+ ret = cmd_q->ccp->vdata->ccp_act->des3(&op);
+ if (ret) {
+ cmd->engine_error = cmd_q->cmd_error;
+ goto e_dst;
+ }
+
+ ccp_process_data(&src, &dst, &op);
+ }
+
+ if (des3->mode != CCP_DES3_MODE_ECB) {
+ /* Retrieve the context and make BE */
+ ret = ccp_copy_from_sb(cmd_q, &ctx, op.jobid, op.sb_ctx,
+ CCP_PASSTHRU_BYTESWAP_256BIT);
+ if (ret) {
+ cmd->engine_error = cmd_q->cmd_error;
+ goto e_dst;
+ }
+
+ /* ...but we only need the last DES3_EDE_BLOCK_SIZE bytes */
+ if (cmd_q->ccp->vdata->version == CCP_VERSION(3, 0))
+ dm_offset = CCP_SB_BYTES - des3->iv_len;
+ else
+ dm_offset = 0;
+ ccp_get_dm_area(&ctx, dm_offset, des3->iv, 0,
+ DES3_EDE_BLOCK_SIZE);
+ }
+e_dst:
+ if (!in_place)
+ ccp_free_data(&dst, cmd_q);
+
+e_src:
+ ccp_free_data(&src, cmd_q);
+
+e_ctx:
+ if (des3->mode != CCP_DES3_MODE_ECB)
+ ccp_dm_free(&ctx);
+
+e_key:
+ ccp_dm_free(&key);
+
+ return ret;
+}
+
static int ccp_run_sha_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd)
{
struct ccp_sha_engine *sha = &cmd->u.sha;
@@ -2155,6 +2350,9 @@ int ccp_run_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd)
case CCP_ENGINE_XTS_AES_128:
ret = ccp_run_xts_aes_cmd(cmd_q, cmd);
break;
+ case CCP_ENGINE_DES3:
+ ret = ccp_run_des3_cmd(cmd_q, cmd);
+ break;
case CCP_ENGINE_SHA:
ret = ccp_run_sha_cmd(cmd_q, cmd);
break;
diff --git a/include/linux/ccp.h b/include/linux/ccp.h
index 6f78295..dbe8aa0 100644
--- a/include/linux/ccp.h
+++ b/include/linux/ccp.h
@@ -301,6 +301,60 @@ struct ccp_sha_engine {
* final sha cmd */
};
+/***** 3DES engine *****/
+enum ccp_des3_mode {
+ CCP_DES3_MODE_ECB = 0,
+ CCP_DES3_MODE_CBC,
+ CCP_DES3_MODE_CFB,
+ CCP_DES3_MODE__LAST,
+};
+
+enum ccp_des3_type {
+ CCP_DES3_TYPE_168 = 1,
+ CCP_DES3_TYPE__LAST,
+ };
+
+enum ccp_des3_action {
+ CCP_DES3_ACTION_DECRYPT = 0,
+ CCP_DES3_ACTION_ENCRYPT,
+ CCP_DES3_ACTION__LAST,
+};
+
+/**
+ * struct ccp_des3_engine - CCP SHA operation
+ * @type: Type of 3DES operation
+ * @mode: cipher mode
+ * @action: 3DES operation (decrypt/encrypt)
+ * @key: key to be used for this 3DES operation
+ * @key_len: length of key (in bytes)
+ * @iv: IV to be used for this AES operation
+ * @iv_len: length in bytes of iv
+ * @src: input data to be used for this operation
+ * @src_len: length of input data used for this operation (in bytes)
+ * @dst: output data produced by this operation
+ *
+ * Variables required to be set when calling ccp_enqueue_cmd():
+ * - type, mode, action, key, key_len, src, dst, src_len
+ * - iv, iv_len for any mode other than ECB
+ *
+ * The iv variable is used as both input and output. On completion of the
+ * 3DES operation the new IV overwrites the old IV.
+ */
+struct ccp_des3_engine {
+ enum ccp_des3_type type;
+ enum ccp_des3_mode mode;
+ enum ccp_des3_action action;
+
+ struct scatterlist *key;
+ u32 key_len; /* In bytes */
+
+ struct scatterlist *iv;
+ u32 iv_len; /* In bytes */
+
+ struct scatterlist *src, *dst;
+ u64 src_len; /* In bytes */
+};
+
/***** RSA engine *****/
/**
* struct ccp_rsa_engine - CCP RSA operation
@@ -550,7 +604,7 @@ struct ccp_ecc_engine {
enum ccp_engine {
CCP_ENGINE_AES = 0,
CCP_ENGINE_XTS_AES_128,
- CCP_ENGINE_RSVD1,
+ CCP_ENGINE_DES3,
CCP_ENGINE_SHA,
CCP_ENGINE_RSA,
CCP_ENGINE_PASSTHRU,
@@ -598,6 +652,7 @@ struct ccp_cmd {
union {
struct ccp_aes_engine aes;
struct ccp_xts_aes_engine xts;
+ struct ccp_des3_engine des3;
struct ccp_sha_engine sha;
struct ccp_rsa_engine rsa;
struct ccp_passthru_engine passthru;
