In this patch, the infrastructure needed to support multibuffer encryption implementation is added:
a) Enhace mcryptd daemon to support blkcipher requests. b) Update configuration to include multi-buffer encryption build support. For an introduction to the multi-buffer implementation, please see http://www.intel.com/content/www/us/en/communications/communications-ia-multi-buffer-paper.html Originally-by: Chandramouli Narayanan <mouli_7...@yahoo.com> Signed-off-by: Tim Chen <tim.c.c...@linux.intel.com> --- crypto/Kconfig | 16 +++ crypto/mcryptd.c | 256 ++++++++++++++++++++++++++++++++++++++++++++++- include/crypto/algapi.h | 1 + include/crypto/mcryptd.h | 36 +++++++ 4 files changed, 308 insertions(+), 1 deletion(-) diff --git a/crypto/Kconfig b/crypto/Kconfig index 7240821..6b51084 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -888,6 +888,22 @@ config CRYPTO_AES_NI_INTEL ECB, CBC, LRW, PCBC, XTS. The 64 bit version has additional acceleration for CTR. +config CRYPTO_AES_CBC_MB + tristate "AES CBC algorithm (x86_64 Multi-Buffer, Experimental)" + depends on X86 && 64BIT + select CRYPTO_ABLK_HELPER + select CRYPTO_MCRYPTD + help + AES CBC encryption implemented using multi-buffer technique. + This algorithm computes on multiple data lanes concurrently with + SIMD instructions for better throughput. It should only be + used when there is significant work to generate many separate + crypto requests that keep all the data lanes filled to get + the performance benefit. If the data lanes are unfilled, a + flush operation will be initiated after some delay to process + the exisiting crypto jobs, adding some extra latency at low + load case. + config CRYPTO_AES_SPARC64 tristate "AES cipher algorithms (SPARC64)" depends on SPARC64 diff --git a/crypto/mcryptd.c b/crypto/mcryptd.c index fe5b495a..01f747c 100644 --- a/crypto/mcryptd.c +++ b/crypto/mcryptd.c @@ -116,8 +116,28 @@ static int mcryptd_enqueue_request(struct mcryptd_queue *queue, return err; } +static int mcryptd_enqueue_blkcipher_request(struct mcryptd_queue *queue, + struct crypto_async_request *request, + struct mcryptd_blkcipher_request_ctx *rctx) +{ + int cpu, err; + struct mcryptd_cpu_queue *cpu_queue; + + cpu = get_cpu(); + cpu_queue = this_cpu_ptr(queue->cpu_queue); + rctx->tag.cpu = cpu; + + err = crypto_enqueue_request(&cpu_queue->queue, request); + pr_debug("enqueue request: cpu %d cpu_queue %p request %p\n", + cpu, cpu_queue, request); + queue_work_on(cpu, kcrypto_wq, &cpu_queue->work); + put_cpu(); + + return err; +} + /* - * Try to opportunisticlly flush the partially completed jobs if + * Try to opportunistically flush the partially completed jobs if * crypto daemon is the only task running. */ static void mcryptd_opportunistic_flush(void) @@ -225,6 +245,130 @@ static inline struct mcryptd_queue *mcryptd_get_queue(struct crypto_tfm *tfm) return ictx->queue; } +static int mcryptd_blkcipher_setkey(struct crypto_ablkcipher *parent, + const u8 *key, unsigned int keylen) +{ + struct mcryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(parent); + struct crypto_blkcipher *child = ctx->child; + int err; + + crypto_blkcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK); + crypto_blkcipher_set_flags(child, crypto_ablkcipher_get_flags(parent) & + CRYPTO_TFM_REQ_MASK); + err = crypto_blkcipher_setkey(child, key, keylen); + crypto_ablkcipher_set_flags(parent, crypto_blkcipher_get_flags(child) & + CRYPTO_TFM_RES_MASK); + return err; +} + +static void mcryptd_blkcipher_crypt(struct ablkcipher_request *req, + struct crypto_blkcipher *child, + int err, + int (*crypt)(struct blkcipher_desc *desc, + struct scatterlist *dst, + struct scatterlist *src, + unsigned int len)) +{ + struct mcryptd_blkcipher_request_ctx *rctx; + struct blkcipher_desc desc; + + rctx = ablkcipher_request_ctx(req); + + if (unlikely(err == -EINPROGRESS)) + goto out; + + /* set up the blkcipher request to work on */ + desc.tfm = child; + desc.info = req->info; + desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP; + rctx->desc = desc; + + /* + * pass addr of descriptor stored in the request context + * so that the callee can get to the request context + */ + err = crypt(&rctx->desc, req->dst, req->src, req->nbytes); + if (err) { + req->base.complete = rctx->complete; + goto out; + } + return; + +out: + local_bh_disable(); + rctx->complete(&req->base, err); + local_bh_enable(); + +} + +static void mcryptd_blkcipher_encrypt(struct crypto_async_request *req, int err) +{ + struct mcryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(req->tfm); + struct crypto_blkcipher *child = ctx->child; + + mcryptd_blkcipher_crypt(ablkcipher_request_cast(req), child, err, + crypto_blkcipher_crt(child)->encrypt); +} + +static void mcryptd_blkcipher_decrypt(struct crypto_async_request *req, int err) +{ + struct mcryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(req->tfm); + struct crypto_blkcipher *child = ctx->child; + + mcryptd_blkcipher_crypt(ablkcipher_request_cast(req), child, err, + crypto_blkcipher_crt(child)->decrypt); +} + +static int mcryptd_blkcipher_enqueue(struct ablkcipher_request *req, + crypto_completion_t complete) +{ + struct mcryptd_blkcipher_request_ctx *rctx = + ablkcipher_request_ctx(req); + struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req); + struct mcryptd_queue *queue; + + queue = mcryptd_get_queue(crypto_ablkcipher_tfm(tfm)); + rctx->complete = req->base.complete; + req->base.complete = complete; + + return mcryptd_enqueue_blkcipher_request(queue, &req->base, rctx); +} + +static int mcryptd_blkcipher_encrypt_enqueue(struct ablkcipher_request *req) +{ + return mcryptd_blkcipher_enqueue(req, mcryptd_blkcipher_encrypt); +} + +static int mcryptd_blkcipher_decrypt_enqueue(struct ablkcipher_request *req) +{ + return mcryptd_blkcipher_enqueue(req, mcryptd_blkcipher_decrypt); +} + +static int mcryptd_blkcipher_init_tfm(struct crypto_tfm *tfm) +{ + struct crypto_instance *inst = crypto_tfm_alg_instance(tfm); + struct mcryptd_instance_ctx *ictx = crypto_instance_ctx(inst); + struct crypto_spawn *spawn = &ictx->spawn; + struct mcryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(tfm); + struct crypto_blkcipher *cipher; + + cipher = crypto_spawn_blkcipher(spawn); + if (IS_ERR(cipher)) + return PTR_ERR(cipher); + + ctx->child = cipher; + tfm->crt_ablkcipher.reqsize = + sizeof(struct mcryptd_blkcipher_request_ctx); + return 0; +} + +static void mcryptd_blkcipher_exit_tfm(struct crypto_tfm *tfm) +{ + struct mcryptd_blkcipher_ctx *ctx = crypto_tfm_ctx(tfm); + + crypto_free_blkcipher(ctx->child); +} + static void *mcryptd_alloc_instance(struct crypto_alg *alg, unsigned int head, unsigned int tail) { @@ -272,6 +416,70 @@ static inline void mcryptd_check_internal(struct rtattr **tb, u32 *type, *mask |= CRYPTO_ALG_INTERNAL; } +static int mcryptd_create_blkcipher(struct crypto_template *tmpl, + struct rtattr **tb, + struct mcryptd_queue *queue) +{ + struct mcryptd_instance_ctx *ctx; + struct crypto_instance *inst; + struct crypto_alg *alg; + u32 type = CRYPTO_ALG_TYPE_BLKCIPHER; + u32 mask = CRYPTO_ALG_TYPE_MASK; + int err; + + mcryptd_check_internal(tb, &type, &mask); + + alg = crypto_get_attr_alg(tb, type, mask); + if (IS_ERR(alg)) + return PTR_ERR(alg); + + pr_debug("crypto: mcryptd crypto alg: %s\n", alg->cra_name); + inst = mcryptd_alloc_instance(alg, 0, sizeof(*ctx)); + err = PTR_ERR(inst); + if (IS_ERR(inst)) + goto out_put_alg; + + ctx = crypto_instance_ctx(inst); + ctx->queue = queue; + + err = crypto_init_spawn(&ctx->spawn, alg, inst, + CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC); + if (err) + goto out_free_inst; + + type = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC; + if (alg->cra_flags & CRYPTO_ALG_INTERNAL) + type |= CRYPTO_ALG_INTERNAL; + inst->alg.cra_flags = type; + inst->alg.cra_type = &crypto_ablkcipher_type; + + inst->alg.cra_ablkcipher.ivsize = alg->cra_blkcipher.ivsize; + inst->alg.cra_ablkcipher.min_keysize = alg->cra_blkcipher.min_keysize; + inst->alg.cra_ablkcipher.max_keysize = alg->cra_blkcipher.max_keysize; + + inst->alg.cra_ablkcipher.geniv = alg->cra_blkcipher.geniv; + + inst->alg.cra_ctxsize = sizeof(struct mcryptd_blkcipher_ctx); + + inst->alg.cra_init = mcryptd_blkcipher_init_tfm; + inst->alg.cra_exit = mcryptd_blkcipher_exit_tfm; + + inst->alg.cra_ablkcipher.setkey = mcryptd_blkcipher_setkey; + inst->alg.cra_ablkcipher.encrypt = mcryptd_blkcipher_encrypt_enqueue; + inst->alg.cra_ablkcipher.decrypt = mcryptd_blkcipher_decrypt_enqueue; + + err = crypto_register_instance(tmpl, inst); + if (err) { + crypto_drop_spawn(&ctx->spawn); +out_free_inst: + kfree(inst); + } + +out_put_alg: + crypto_mod_put(alg); + return err; +} + static int mcryptd_hash_init_tfm(struct crypto_tfm *tfm) { struct crypto_instance *inst = crypto_tfm_alg_instance(tfm); @@ -563,6 +771,8 @@ static int mcryptd_create(struct crypto_template *tmpl, struct rtattr **tb) return PTR_ERR(algt); switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) { + case CRYPTO_ALG_TYPE_BLKCIPHER: + return mcryptd_create_blkcipher(tmpl, tb, &mqueue); case CRYPTO_ALG_TYPE_DIGEST: return mcryptd_create_hash(tmpl, tb, &mqueue); break; @@ -577,6 +787,10 @@ static void mcryptd_free(struct crypto_instance *inst) struct hashd_instance_ctx *hctx = crypto_instance_ctx(inst); switch (inst->alg.cra_flags & CRYPTO_ALG_TYPE_MASK) { + case CRYPTO_ALG_TYPE_BLKCIPHER: + crypto_drop_spawn(&ctx->spawn); + kfree(inst); + return; case CRYPTO_ALG_TYPE_AHASH: crypto_drop_shash(&hctx->spawn); kfree(ahash_instance(inst)); @@ -594,6 +808,46 @@ static struct crypto_template mcryptd_tmpl = { .module = THIS_MODULE, }; +struct mcryptd_ablkcipher *mcryptd_alloc_ablkcipher(const char *alg_name, + u32 type, u32 mask) +{ + char cryptd_alg_name[CRYPTO_MAX_ALG_NAME]; + struct crypto_tfm *tfm; + + if (snprintf(cryptd_alg_name, CRYPTO_MAX_ALG_NAME, + "mcryptd(%s)", alg_name) >= CRYPTO_MAX_ALG_NAME) + return ERR_PTR(-EINVAL); + type &= ~(CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_GENIV); + type |= CRYPTO_ALG_TYPE_BLKCIPHER; + mask &= ~CRYPTO_ALG_TYPE_MASK; + mask |= (CRYPTO_ALG_GENIV | CRYPTO_ALG_TYPE_BLKCIPHER_MASK); + tfm = crypto_alloc_base(cryptd_alg_name, type, mask); + if (IS_ERR(tfm)) + return ERR_CAST(tfm); + if (tfm->__crt_alg->cra_module != THIS_MODULE) { + crypto_free_tfm(tfm); + return ERR_PTR(-EINVAL); + } + + return __mcryptd_ablkcipher_cast(__crypto_ablkcipher_cast(tfm)); +} +EXPORT_SYMBOL_GPL(mcryptd_alloc_ablkcipher); + +struct crypto_blkcipher *mcryptd_ablkcipher_child( + struct mcryptd_ablkcipher *tfm) +{ + struct mcryptd_blkcipher_ctx *ctx = crypto_ablkcipher_ctx(&tfm->base); + + return ctx->child; +} +EXPORT_SYMBOL_GPL(mcryptd_ablkcipher_child); + +void mcryptd_free_ablkcipher(struct mcryptd_ablkcipher *tfm) +{ + crypto_free_ablkcipher(&tfm->base); +} +EXPORT_SYMBOL_GPL(mcryptd_free_ablkcipher); + struct mcryptd_ahash *mcryptd_alloc_ahash(const char *alg_name, u32 type, u32 mask) { diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h index c9fe145..4c5633f 100644 --- a/include/crypto/algapi.h +++ b/include/crypto/algapi.h @@ -301,6 +301,7 @@ static inline void blkcipher_walk_init(struct blkcipher_walk *walk, walk->in.sg = src; walk->out.sg = dst; walk->total = nbytes; + walk->flags = 0; } static inline void ablkcipher_walk_init(struct ablkcipher_walk *walk, diff --git a/include/crypto/mcryptd.h b/include/crypto/mcryptd.h index c23ee1f..3fbe4fa 100644 --- a/include/crypto/mcryptd.h +++ b/include/crypto/mcryptd.h @@ -13,6 +13,7 @@ #include <linux/crypto.h> #include <linux/kernel.h> #include <crypto/hash.h> +#include <crypto/b128ops.h> struct mcryptd_ahash { struct crypto_ahash base; @@ -95,6 +96,41 @@ struct mcryptd_alg_state { unsigned long (*flusher)(struct mcryptd_alg_cstate *cstate); }; +struct mcryptd_ablkcipher { + struct crypto_ablkcipher base; +}; + +static inline struct mcryptd_ablkcipher *__mcryptd_ablkcipher_cast( + struct crypto_ablkcipher *tfm) +{ + return (struct mcryptd_ablkcipher *)tfm; +} + +/* alg_name should be algorithm to be cryptd-ed */ +struct mcryptd_ablkcipher *mcryptd_alloc_ablkcipher(const char *alg_name, + u32 type, u32 mask); +struct crypto_blkcipher *mcryptd_ablkcipher_child( + struct mcryptd_ablkcipher *tfm); +void mcryptd_free_ablkcipher(struct mcryptd_ablkcipher *tfm); + +struct mcryptd_blkcipher_ctx { + struct crypto_blkcipher *child; + struct mcryptd_alg_state *alg_state; +}; + +struct mcryptd_blkcipher_request_ctx { + struct list_head waiter; + crypto_completion_t complete; + struct mcryptd_tag tag; + struct ablkcipher_walk walk; + u8 flag; + int nbytes; + int error; + struct blkcipher_desc desc; + void *job; + u128 seq_iv; /* running iv of a sequence */ +}; + /* return delay in jiffies from current time */ static inline unsigned long get_delay(unsigned long t) { -- 1.7.11.7 -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
