diff options
Diffstat (limited to 'drivers/crypto/hisilicon')
| -rw-r--r-- | drivers/crypto/hisilicon/Kconfig | 14 | ||||
| -rw-r--r-- | drivers/crypto/hisilicon/Makefile | 2 | ||||
| -rw-r--r-- | drivers/crypto/hisilicon/sec/Makefile | 3 | ||||
| -rw-r--r-- | drivers/crypto/hisilicon/sec/sec_algs.c | 1122 | ||||
| -rw-r--r-- | drivers/crypto/hisilicon/sec/sec_drv.c | 1323 | ||||
| -rw-r--r-- | drivers/crypto/hisilicon/sec/sec_drv.h | 428 |
6 files changed, 2892 insertions, 0 deletions
diff --git a/drivers/crypto/hisilicon/Kconfig b/drivers/crypto/hisilicon/Kconfig new file mode 100644 index 000000000000..8ca9c503bcb0 --- /dev/null +++ b/drivers/crypto/hisilicon/Kconfig @@ -0,0 +1,14 @@ +# SPDX-License-Identifier: GPL-2.0 + +config CRYPTO_DEV_HISI_SEC + tristate "Support for Hisilicon SEC crypto block cipher accelerator" + select CRYPTO_BLKCIPHER + select CRYPTO_ALGAPI + select SG_SPLIT + depends on ARM64 || COMPILE_TEST + depends on HAS_IOMEM + help + Support for Hisilicon SEC Engine in Hip06 and Hip07 + + To compile this as a module, choose M here: the module + will be called hisi_sec. diff --git a/drivers/crypto/hisilicon/Makefile b/drivers/crypto/hisilicon/Makefile new file mode 100644 index 000000000000..463f46ace182 --- /dev/null +++ b/drivers/crypto/hisilicon/Makefile @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_CRYPTO_DEV_HISI_SEC) += sec/ diff --git a/drivers/crypto/hisilicon/sec/Makefile b/drivers/crypto/hisilicon/sec/Makefile new file mode 100644 index 000000000000..a55b698e0c27 --- /dev/null +++ b/drivers/crypto/hisilicon/sec/Makefile @@ -0,0 +1,3 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_CRYPTO_DEV_HISI_SEC) += hisi_sec.o +hisi_sec-y = sec_algs.o sec_drv.o diff --git a/drivers/crypto/hisilicon/sec/sec_algs.c b/drivers/crypto/hisilicon/sec/sec_algs.c new file mode 100644 index 000000000000..f7d6d690116e --- /dev/null +++ b/drivers/crypto/hisilicon/sec/sec_algs.c @@ -0,0 +1,1122 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2016-2017 Hisilicon Limited. */ +#include <linux/crypto.h> +#include <linux/dma-mapping.h> +#include <linux/dmapool.h> +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/slab.h> + +#include <crypto/aes.h> +#include <crypto/algapi.h> +#include <crypto/des.h> +#include <crypto/skcipher.h> +#include <crypto/xts.h> +#include <crypto/internal/skcipher.h> + +#include "sec_drv.h" + +#define SEC_MAX_CIPHER_KEY 64 +#define SEC_REQ_LIMIT SZ_32M + +struct sec_c_alg_cfg { + unsigned c_alg : 3; + unsigned c_mode : 3; + unsigned key_len : 2; + unsigned c_width : 2; +}; + +static const struct sec_c_alg_cfg sec_c_alg_cfgs[] = { + [SEC_C_DES_ECB_64] = { + .c_alg = SEC_C_ALG_DES, + .c_mode = SEC_C_MODE_ECB, + .key_len = SEC_KEY_LEN_DES, + }, + [SEC_C_DES_CBC_64] = { + .c_alg = SEC_C_ALG_DES, + .c_mode = SEC_C_MODE_CBC, + .key_len = SEC_KEY_LEN_DES, + }, + [SEC_C_3DES_ECB_192_3KEY] = { + .c_alg = SEC_C_ALG_3DES, + .c_mode = SEC_C_MODE_ECB, + .key_len = SEC_KEY_LEN_3DES_3_KEY, + }, + [SEC_C_3DES_ECB_192_2KEY] = { + .c_alg = SEC_C_ALG_3DES, + .c_mode = SEC_C_MODE_ECB, + .key_len = SEC_KEY_LEN_3DES_2_KEY, + }, + [SEC_C_3DES_CBC_192_3KEY] = { + .c_alg = SEC_C_ALG_3DES, + .c_mode = SEC_C_MODE_CBC, + .key_len = SEC_KEY_LEN_3DES_3_KEY, + }, + [SEC_C_3DES_CBC_192_2KEY] = { + .c_alg = SEC_C_ALG_3DES, + .c_mode = SEC_C_MODE_CBC, + .key_len = SEC_KEY_LEN_3DES_2_KEY, + }, + [SEC_C_AES_ECB_128] = { + .c_alg = SEC_C_ALG_AES, + .c_mode = SEC_C_MODE_ECB, + .key_len = SEC_KEY_LEN_AES_128, + }, + [SEC_C_AES_ECB_192] = { + .c_alg = SEC_C_ALG_AES, + .c_mode = SEC_C_MODE_ECB, + .key_len = SEC_KEY_LEN_AES_192, + }, + [SEC_C_AES_ECB_256] = { + .c_alg = SEC_C_ALG_AES, + .c_mode = SEC_C_MODE_ECB, + .key_len = SEC_KEY_LEN_AES_256, + }, + [SEC_C_AES_CBC_128] = { + .c_alg = SEC_C_ALG_AES, + .c_mode = SEC_C_MODE_CBC, + .key_len = SEC_KEY_LEN_AES_128, + }, + [SEC_C_AES_CBC_192] = { + .c_alg = SEC_C_ALG_AES, + .c_mode = SEC_C_MODE_CBC, + .key_len = SEC_KEY_LEN_AES_192, + }, + [SEC_C_AES_CBC_256] = { + .c_alg = SEC_C_ALG_AES, + .c_mode = SEC_C_MODE_CBC, + .key_len = SEC_KEY_LEN_AES_256, + }, + [SEC_C_AES_CTR_128] = { + .c_alg = SEC_C_ALG_AES, + .c_mode = SEC_C_MODE_CTR, + .key_len = SEC_KEY_LEN_AES_128, + }, + [SEC_C_AES_CTR_192] = { + .c_alg = SEC_C_ALG_AES, + .c_mode = SEC_C_MODE_CTR, + .key_len = SEC_KEY_LEN_AES_192, + }, + [SEC_C_AES_CTR_256] = { + .c_alg = SEC_C_ALG_AES, + .c_mode = SEC_C_MODE_CTR, + .key_len = SEC_KEY_LEN_AES_256, + }, + [SEC_C_AES_XTS_128] = { + .c_alg = SEC_C_ALG_AES, + .c_mode = SEC_C_MODE_XTS, + .key_len = SEC_KEY_LEN_AES_128, + }, + [SEC_C_AES_XTS_256] = { + .c_alg = SEC_C_ALG_AES, + .c_mode = SEC_C_MODE_XTS, + .key_len = SEC_KEY_LEN_AES_256, + }, + [SEC_C_NULL] = { + }, +}; + +/* + * Mutex used to ensure safe operation of reference count of + * alg providers + */ +static DEFINE_MUTEX(algs_lock); +static unsigned int active_devs; + +static void sec_alg_skcipher_init_template(struct sec_alg_tfm_ctx *ctx, + struct sec_bd_info *req, + enum sec_cipher_alg alg) +{ + const struct sec_c_alg_cfg *cfg = &sec_c_alg_cfgs[alg]; + + memset(req, 0, sizeof(*req)); + req->w0 |= cfg->c_mode << SEC_BD_W0_C_MODE_S; + req->w1 |= cfg->c_alg << SEC_BD_W1_C_ALG_S; + req->w3 |= cfg->key_len << SEC_BD_W3_C_KEY_LEN_S; + req->w0 |= cfg->c_width << SEC_BD_W0_C_WIDTH_S; + + req->cipher_key_addr_lo = lower_32_bits(ctx->pkey); + req->cipher_key_addr_hi = upper_32_bits(ctx->pkey); +} + +static void sec_alg_skcipher_init_context(struct crypto_skcipher *atfm, + const u8 *key, + unsigned int keylen, + enum sec_cipher_alg alg) +{ + struct crypto_tfm *tfm = crypto_skcipher_tfm(atfm); + struct sec_alg_tfm_ctx *ctx = crypto_tfm_ctx(tfm); + + ctx->cipher_alg = alg; + memcpy(ctx->key, key, keylen); + sec_alg_skcipher_init_template(ctx, &ctx->req_template, + ctx->cipher_alg); +} + +static int sec_alloc_and_fill_hw_sgl(struct sec_hw_sgl **sec_sgl, + dma_addr_t *psec_sgl, + struct scatterlist *sgl, + int count, + struct sec_dev_info *info) +{ + struct sec_hw_sgl *sgl_current = NULL; + struct sec_hw_sgl *sgl_next; + dma_addr_t sgl_next_dma; + struct scatterlist *sg; + int ret, sge_index, i; + + if (!count) + return -EINVAL; + + for_each_sg(sgl, sg, count, i) { + sge_index = i % SEC_MAX_SGE_NUM; + if (sge_index == 0) { + sgl_next = dma_pool_zalloc(info->hw_sgl_pool, + GFP_KERNEL, &sgl_next_dma); + if (!sgl_next) { + ret = -ENOMEM; + goto err_free_hw_sgls; + } + + if (!sgl_current) { /* First one */ + *psec_sgl = sgl_next_dma; + *sec_sgl = sgl_next; + } else { /* Chained */ + sgl_current->entry_sum_in_sgl = SEC_MAX_SGE_NUM; + sgl_current->next_sgl = sgl_next_dma; + sgl_current->next = sgl_next; + } + sgl_current = sgl_next; + } + sgl_current->sge_entries[sge_index].buf = sg_dma_address(sg); + sgl_current->sge_entries[sge_index].len = sg_dma_len(sg); + sgl_current->data_bytes_in_sgl += sg_dma_len(sg); + } + sgl_current->entry_sum_in_sgl = count % SEC_MAX_SGE_NUM; + sgl_current->next_sgl = 0; + (*sec_sgl)->entry_sum_in_chain = count; + + return 0; + +err_free_hw_sgls: + sgl_current = *sec_sgl; + while (sgl_current) { + sgl_next = sgl_current->next; + dma_pool_free(info->hw_sgl_pool, sgl_current, + sgl_current->next_sgl); + sgl_current = sgl_next; + } + *psec_sgl = 0; + + return ret; +} + +static void sec_free_hw_sgl(struct sec_hw_sgl *hw_sgl, + dma_addr_t psec_sgl, struct sec_dev_info *info) +{ + struct sec_hw_sgl *sgl_current, *sgl_next; + + if (!hw_sgl) + return; + sgl_current = hw_sgl; + while (sgl_current->next) { + sgl_next = sgl_current->next; + dma_pool_free(info->hw_sgl_pool, sgl_current, + sgl_current->next_sgl); + sgl_current = sgl_next; + } + dma_pool_free(info->hw_sgl_pool, hw_sgl, psec_sgl); +} + +static int sec_alg_skcipher_setkey(struct crypto_skcipher *tfm, + const u8 *key, unsigned int keylen, + enum sec_cipher_alg alg) +{ + struct sec_alg_tfm_ctx *ctx = crypto_skcipher_ctx(tfm); + struct device *dev = ctx->queue->dev_info->dev; + + mutex_lock(&ctx->lock); + if (ctx->key) { + /* rekeying */ + memset(ctx->key, 0, SEC_MAX_CIPHER_KEY); + } else { + /* new key */ + ctx->key = dma_zalloc_coherent(dev, SEC_MAX_CIPHER_KEY, + &ctx->pkey, GFP_KERNEL); + if (!ctx->key) { + mutex_unlock(&ctx->lock); + return -ENOMEM; + } + } + mutex_unlock(&ctx->lock); + sec_alg_skcipher_init_context(tfm, key, keylen, alg); + + return 0; +} + +static int sec_alg_skcipher_setkey_aes_ecb(struct crypto_skcipher *tfm, + const u8 *key, unsigned int keylen) +{ + enum sec_cipher_alg alg; + + switch (keylen) { + case AES_KEYSIZE_128: + alg = SEC_C_AES_ECB_128; + break; + case AES_KEYSIZE_192: + alg = SEC_C_AES_ECB_192; + break; + case AES_KEYSIZE_256: + alg = SEC_C_AES_ECB_256; + break; + default: + return -EINVAL; + } + + return sec_alg_skcipher_setkey(tfm, key, keylen, alg); +} + +static int sec_alg_skcipher_setkey_aes_cbc(struct crypto_skcipher *tfm, + const u8 *key, unsigned int keylen) +{ + enum sec_cipher_alg alg; + + switch (keylen) { + case AES_KEYSIZE_128: + alg = SEC_C_AES_CBC_128; + break; + case AES_KEYSIZE_192: + alg = SEC_C_AES_CBC_192; + break; + case AES_KEYSIZE_256: + alg = SEC_C_AES_CBC_256; + break; + default: + return -EINVAL; + } + + return sec_alg_skcipher_setkey(tfm, key, keylen, alg); +} + +static int sec_alg_skcipher_setkey_aes_ctr(struct crypto_skcipher *tfm, + const u8 *key, unsigned int keylen) +{ + enum sec_cipher_alg alg; + + switch (keylen) { + case AES_KEYSIZE_128: + alg = SEC_C_AES_CTR_128; + break; + case AES_KEYSIZE_192: + alg = SEC_C_AES_CTR_192; + break; + case AES_KEYSIZE_256: + alg = SEC_C_AES_CTR_256; + break; + default: + return -EINVAL; + } + + return sec_alg_skcipher_setkey(tfm, key, keylen, alg); +} + +static int sec_alg_skcipher_setkey_aes_xts(struct crypto_skcipher *tfm, + const u8 *key, unsigned int keylen) +{ + enum sec_cipher_alg alg; + int ret; + + ret = xts_verify_key(tfm, key, keylen); + if (ret) + return ret; + + switch (keylen) { + case AES_KEYSIZE_128 * 2: + alg = SEC_C_AES_XTS_128; + break; + case AES_KEYSIZE_256 * 2: + alg = SEC_C_AES_XTS_256; + break; + default: + return -EINVAL; + } + + return sec_alg_skcipher_setkey(tfm, key, keylen, alg); +} + +static int sec_alg_skcipher_setkey_des_ecb(struct crypto_skcipher *tfm, + const u8 *key, unsigned int keylen) +{ + if (keylen != DES_KEY_SIZE) + return -EINVAL; + + return sec_alg_skcipher_setkey(tfm, key, keylen, SEC_C_DES_ECB_64); +} + +static int sec_alg_skcipher_setkey_des_cbc(struct crypto_skcipher *tfm, + const u8 *key, unsigned int keylen) +{ + if (keylen != DES_KEY_SIZE) + return -EINVAL; + + return sec_alg_skcipher_setkey(tfm, key, keylen, SEC_C_DES_CBC_64); +} + +static int sec_alg_skcipher_setkey_3des_ecb(struct crypto_skcipher *tfm, + const u8 *key, unsigned int keylen) +{ + if (keylen != DES_KEY_SIZE * 3) + return -EINVAL; + + return sec_alg_skcipher_setkey(tfm, key, keylen, + SEC_C_3DES_ECB_192_3KEY); +} + +static int sec_alg_skcipher_setkey_3des_cbc(struct crypto_skcipher *tfm, + const u8 *key, unsigned int keylen) +{ + if (keylen != DES3_EDE_KEY_SIZE) + return -EINVAL; + + return sec_alg_skcipher_setkey(tfm, key, keylen, + SEC_C_3DES_CBC_192_3KEY); +} + +static void sec_alg_free_el(struct sec_request_el *el, + struct sec_dev_info *info) +{ + sec_free_hw_sgl(el->out, el->dma_out, info); + sec_free_hw_sgl(el->in, el->dma_in, info); + kfree(el->sgl_in); + kfree(el->sgl_out); + kfree(el); +} + +/* queuelock must be held */ +static int sec_send_request(struct sec_request *sec_req, struct sec_queue *queue) +{ + struct sec_request_el *el, *temp; + int ret = 0; + + mutex_lock(&sec_req->lock); + list_for_each_entry_safe(el, temp, &sec_req->elements, head) { + /* + * Add to hardware queue only under following circumstances + * 1) Software and hardware queue empty so no chain dependencies + * 2) No dependencies as new IV - (check software queue empty + * to maintain order) + * 3) No dependencies because the mode does no chaining. + * + * In other cases first insert onto the software queue which + * is then emptied as requests complete + */ + if (!queue->havesoftqueue || + (kfifo_is_empty(&queue->softqueue) && + sec_queue_empty(queue))) { + ret = sec_queue_send(queue, &el->req, sec_req); + if (ret == -EAGAIN) { + /* Wait unti we can send then try again */ + /* DEAD if here - should not happen */ + ret = -EBUSY; + goto err_unlock; + } + } else { + kfifo_put(&queue->softqueue, el); + } + } +err_unlock: + mutex_unlock(&sec_req->lock); + + return ret; +} + +static void sec_skcipher_alg_callback(struct sec_bd_info *sec_resp, + struct crypto_async_request *req_base) +{ + struct skcipher_request *skreq = container_of(req_base, + struct skcipher_request, + base); + struct sec_request *sec_req = skcipher_request_ctx(skreq); + struct sec_request *backlog_req; + struct sec_request_el *sec_req_el, *nextrequest; + struct sec_alg_tfm_ctx *ctx = sec_req->tfm_ctx; + struct crypto_skcipher *atfm = crypto_skcipher_reqtfm(skreq); + struct device *dev = ctx->queue->dev_info->dev; + int icv_or_skey_en, ret; + bool done; + + sec_req_el = list_first_entry(&sec_req->elements, struct sec_request_el, + head); + icv_or_skey_en = (sec_resp->w0 & SEC_BD_W0_ICV_OR_SKEY_EN_M) >> + SEC_BD_W0_ICV_OR_SKEY_EN_S; + if (sec_resp->w1 & SEC_BD_W1_BD_INVALID || icv_or_skey_en == 3) { + dev_err(dev, "Got an invalid answer %lu %d\n", + sec_resp->w1 & SEC_BD_W1_BD_INVALID, + icv_or_skey_en); + sec_req->err = -EINVAL; + /* + * We need to muddle on to avoid getting stuck with elements + * on the queue. Error will be reported so requester so + * it should be able to handle appropriately. + */ + } + + mutex_lock(&ctx->queue->queuelock); + /* Put the IV in place for chained cases */ + switch (ctx->cipher_alg) { + case SEC_C_AES_CBC_128: + case SEC_C_AES_CBC_192: + case SEC_C_AES_CBC_256: + if (sec_req_el->req.w0 & SEC_BD_W0_DE) + sg_pcopy_to_buffer(sec_req_el->sgl_out, + sg_nents(sec_req_el->sgl_out), + skreq->iv, + crypto_skcipher_ivsize(atfm), + sec_req_el->el_length - + crypto_skcipher_ivsize(atfm)); + else + sg_pcopy_to_buffer(sec_req_el->sgl_in, + sg_nents(sec_req_el->sgl_in), + skreq->iv, + crypto_skcipher_ivsize(atfm), + sec_req_el->el_length - + crypto_skcipher_ivsize(atfm)); + /* No need to sync to the device as coherent DMA */ + break; + case SEC_C_AES_CTR_128: + case SEC_C_AES_CTR_192: + case SEC_C_AES_CTR_256: + crypto_inc(skreq->iv, 16); + break; + default: + /* Do not update */ + break; + } + + if (ctx->queue->havesoftqueue && + !kfifo_is_empty(&ctx->queue->softqueue) && + sec_queue_empty(ctx->queue)) { + ret = kfifo_get(&ctx->queue->softqueue, &nextrequest); + if (ret <= 0) + dev_err(dev, + "Error getting next element from kfifo %d\n", + ret); + else + /* We know there is space so this cannot fail */ + sec_queue_send(ctx->queue, &nextrequest->req, + nextrequest->sec_req); + } else if (!list_empty(&ctx->backlog)) { + /* Need to verify there is room first */ + backlog_req = list_first_entry(&ctx->backlog, + typeof(*backlog_req), + backlog_head); + if (sec_queue_can_enqueue(ctx->queue, + backlog_req->num_elements) || + (ctx->queue->havesoftqueue && + kfifo_avail(&ctx->queue->softqueue) > + backlog_req->num_elements)) { + sec_send_request(backlog_req, ctx->queue); + backlog_req->req_base->complete(backlog_req->req_base, + -EINPROGRESS); + list_del(&backlog_req->backlog_head); + } + } + mutex_unlock(&ctx->queue->queuelock); + + mutex_lock(&sec_req->lock); + list_del(&sec_req_el->head); + mutex_unlock(&sec_req->lock); + sec_alg_free_el(sec_req_el, ctx->queue->dev_info); + + /* + * Request is done. + * The dance is needed as the lock is freed in the completion + */ + mutex_lock(&sec_req->lock); + done = list_empty(&sec_req->elements); + mutex_unlock(&sec_req->lock); + if (done) { + if (crypto_skcipher_ivsize(atfm)) { + dma_unmap_single(dev, sec_req->dma_iv, + crypto_skcipher_ivsize(atfm), + DMA_TO_DEVICE); + } + dma_unmap_sg(dev, skreq->src, sec_req->len_in, + DMA_BIDIRECTIONAL); + if (skreq->src != skreq->dst) + dma_unmap_sg(dev, skreq->dst, sec_req->len_out, + DMA_BIDIRECTIONAL); + skreq->base.complete(&skreq->base, sec_req->err); + } +} + +void sec_alg_callback(struct sec_bd_info *resp, void *shadow) +{ + struct sec_request *sec_req = shadow; + + sec_req->cb(resp, sec_req->req_base); +} + +static int sec_alg_alloc_and_calc_split_sizes(int length, size_t **split_sizes, + int *steps) +{ + size_t *sizes; + int i; + + /* Split into suitable sized blocks */ + *steps = roundup(length, SEC_REQ_LIMIT) / SEC_REQ_LIMIT; + sizes = kcalloc(*steps, sizeof(*sizes), GFP_KERNEL); + if (!sizes) + return -ENOMEM; + + for (i = 0; i < *steps - 1; i++) + sizes[i] = SEC_REQ_LIMIT; + sizes[*steps - 1] = length - SEC_REQ_LIMIT * (*steps - 1); + *split_sizes = sizes; + + return 0; +} + +static int sec_map_and_split_sg(struct scatterlist *sgl, size_t *split_sizes, + int steps, struct scatterlist ***splits, + int **splits_nents, + int sgl_len_in, + struct device *dev) +{ + int ret, count; + + count = dma_map_sg(dev, sgl, sgl_len_in, DMA_BIDIRECTIONAL); + if (!count) + return -EINVAL; + + *splits = kcalloc(steps, sizeof(struct scatterlist *), GFP_KERNEL); + if (!*splits) { + ret = -ENOMEM; + goto err_unmap_sg; + } + *splits_nents = kcalloc(steps, sizeof(int), GFP_KERNEL); + if (!*splits_nents) { + ret = -ENOMEM; + goto err_free_splits; + } + + /* output the scatter list before and after this */ + ret = sg_split(sgl, count, 0, steps, split_sizes, + *splits, *splits_nents, GFP_KERNEL); + if (ret) { + ret = -ENOMEM; + goto err_free_splits_nents; + } + + return 0; + +err_free_splits_nents: + kfree(*splits_nents); +err_free_splits: + kfree(*splits); +err_unmap_sg: + dma_unmap_sg(dev, sgl, sgl_len_in, DMA_BIDIRECTIONAL); + + return ret; +} + +/* + * Reverses the sec_map_and_split_sg call for messages not yet added to + * the queues. + */ +static void sec_unmap_sg_on_err(struct scatterlist *sgl, int steps, + struct scatterlist **splits, int *splits_nents, + int sgl_len_in, struct device *dev) +{ + int i; + + for (i = 0; i < steps; i++) + kfree(splits[i]); + kfree(splits_nents); + kfree(splits); + + dma_unmap_sg(dev, sgl, sgl_len_in, DMA_BIDIRECTIONAL); +} + +static struct sec_request_el +*sec_alg_alloc_and_fill_el(struct sec_bd_info *template, int encrypt, + int el_size, bool different_dest, + struct scatterlist *sgl_in, int n_ents_in, + struct scatterlist *sgl_out, int n_ents_out, + struct sec_dev_info *info) +{ + struct sec_request_el *el; + struct sec_bd_info *req; + int ret; + + el = kzalloc(sizeof(*el), GFP_KERNEL); + if (!el) + return ERR_PTR(-ENOMEM); + el->el_length = el_size; + req = &el->req; + memcpy(req, template, sizeof(*req)); + + req->w0 &= ~SEC_BD_W0_CIPHER_M; + if (encrypt) + req->w0 |= SEC_CIPHER_ENCRYPT << SEC_BD_W0_CIPHER_S; + else + req->w0 |= SEC_CIPHER_DECRYPT << SEC_BD_W0_CIPHER_S; + + req->w0 &= ~SEC_BD_W0_C_GRAN_SIZE_19_16_M; + req->w0 |= ((el_size >> 16) << SEC_BD_W0_C_GRAN_SIZE_19_16_S) & + SEC_BD_W0_C_GRAN_SIZE_19_16_M; + + req->w0 &= ~SEC_BD_W0_C_GRAN_SIZE_21_20_M; + req->w0 |= ((el_size >> 20) << SEC_BD_W0_C_GRAN_SIZE_21_20_S) & + SEC_BD_W0_C_GRAN_SIZE_21_20_M; + + /* Writing whole u32 so no need to take care of masking */ + req->w2 = ((1 << SEC_BD_W2_GRAN_NUM_S) & SEC_BD_W2_GRAN_NUM_M) | + ((el_size << SEC_BD_W2_C_GRAN_SIZE_15_0_S) & + SEC_BD_W2_C_GRAN_SIZE_15_0_M); + + req->w3 &= ~SEC_BD_W3_CIPHER_LEN_OFFSET_M; + req->w1 |= SEC_BD_W1_ADDR_TYPE; + + el->sgl_in = sgl_in; + + ret = sec_alloc_and_fill_hw_sgl(&el->in, &el->dma_in, el->sgl_in, + n_ents_in, info); + if (ret) + goto err_free_el; + + req->data_addr_lo = lower_32_bits(el->dma_in); + req->data_addr_hi = upper_32_bits(el->dma_in); + + if (different_dest) { + el->sgl_out = sgl_out; + ret = sec_alloc_and_fill_hw_sgl(&el->out, &el->dma_out, + el->sgl_out, + n_ents_out, info); + if (ret) + goto err_free_hw_sgl_in; + + req->w0 |= SEC_BD_W0_DE; + req->cipher_destin_addr_lo = lower_32_bits(el->dma_out); + req->cipher_destin_addr_hi = upper_32_bits(el->dma_out); + + } else { + req->w0 &= ~SEC_BD_W0_DE; + req->cipher_destin_addr_lo = lower_32_bits(el->dma_in); + req->cipher_destin_addr_hi = upper_32_bits(el->dma_in); + } + + return el; + +err_free_hw_sgl_in: + sec_free_hw_sgl(el->in, el->dma_in, info); +err_free_el: + kfree(el); + + return ERR_PTR(ret); +} + +static int sec_alg_skcipher_crypto(struct skcipher_request *skreq, + bool encrypt) +{ + struct crypto_skcipher *atfm = crypto_skcipher_reqtfm(skreq); + struct crypto_tfm *tfm = crypto_skcipher_tfm(atfm); + struct sec_alg_tfm_ctx *ctx = crypto_tfm_ctx(tfm); + struct sec_queue *queue = ctx->queue; + struct sec_request *sec_req = skcipher_request_ctx(skreq); + struct sec_dev_info *info = queue->dev_info; + int i, ret, steps; + size_t *split_sizes; + struct scatterlist **splits_in; + struct scatterlist **splits_out = NULL; + int *splits_in_nents; + int *splits_out_nents = NULL; + struct sec_request_el *el, *temp; + + mutex_init(&sec_req->lock); + sec_req->req_base = &skreq->base; + sec_req->err = 0; + /* SGL mapping out here to allow us to break it up as necessary */ + sec_req->len_in = sg_nents(skreq->src); + + ret = sec_alg_alloc_and_calc_split_sizes(skreq->cryptlen, &split_sizes, + &steps); + if (ret) + return ret; + sec_req->num_elements = steps; + ret = sec_map_and_split_sg(skreq->src, split_sizes, steps, &splits_in, + &splits_in_nents, sec_req->len_in, + info->dev); + if (ret) + goto err_free_split_sizes; + + if (skreq->src != skreq->dst) { + sec_req->len_out = sg_nents(skreq->dst); + ret = sec_map_and_split_sg(skreq->dst, split_sizes, steps, + &splits_out, &splits_out_nents, + sec_req->len_out, info->dev); + if (ret) + goto err_unmap_in_sg; + } + /* Shared info stored in seq_req - applies to all BDs */ + sec_req->tfm_ctx = ctx; + sec_req->cb = sec_skcipher_alg_callback; + INIT_LIST_HEAD(&sec_req->elements); + + /* + * Future optimization. + * In the chaining case we can't use a dma pool bounce buffer + * but in the case where we know there is no chaining we can + */ + if (crypto_skcipher_ivsize(atfm)) { + sec_req->dma_iv = dma_map_single(info->dev, skreq->iv, + crypto_skcipher_ivsize(atfm), + DMA_TO_DEVICE); + if (dma_mapping_error(info->dev, sec_req->dma_iv)) { + ret = -ENOMEM; + goto err_unmap_out_sg; + } + } + + /* Set them all up then queue - cleaner error handling. */ + for (i = 0; i < steps; i++) { + el = sec_alg_alloc_and_fill_el(&ctx->req_template, + encrypt ? 1 : 0, + split_sizes[i], + skreq->src != skreq->dst, + splits_in[i], splits_in_nents[i], + splits_out[i], + splits_out_nents[i], info); + if (IS_ERR(el)) { + ret = PTR_ERR(el); + goto err_free_elements; + } + el->req.cipher_iv_addr_lo = lower_32_bits(sec_req->dma_iv); + el->req.cipher_iv_addr_hi = upper_32_bits(sec_req->dma_iv); + el->sec_req = sec_req; + list_add_tail(&el->head, &sec_req->elements); + } + + /* + * Only attempt to queue if the whole lot can fit in the queue - + * we can't successfully cleanup after a partial queing so this + * must succeed or fail atomically. + * + * Big hammer test of both software and hardware queues - could be + * more refined but this is unlikely to happen so no need. + */ + + /* Cleanup - all elements in pointer arrays have been coppied */ + kfree(splits_in_nents); + kfree(splits_in); + kfree(splits_out_nents); + kfree(splits_out); + kfree(split_sizes); + + /* Grab a big lock for a long time to avoid concurrency issues */ + mutex_lock(&queue->queuelock); + + /* + * Can go on to queue if we have space in either: + * 1) The hardware queue and no software queue + * 2) The software queue + * AND there is nothing in the backlog. If there is backlog we + * have to only queue to the backlog queue and return busy. + */ + if ((!sec_queue_can_enqueue(queue, steps) && + (!queue->havesoftqueue || + kfifo_avail(&queue->softqueue) > steps)) || + !list_empty(&ctx->backlog)) { + if ((skreq->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)) { + list_add_tail(&sec_req->backlog_head, &ctx->backlog); + mutex_unlock(&queue->queuelock); + return -EBUSY; + } + + ret = -EBUSY; + mutex_unlock(&queue->queuelock); + goto err_free_elements; + } + ret = sec_send_request(sec_req, queue); + mutex_unlock(&queue->queuelock); + if (ret) + goto err_free_elements; + + return -EINPROGRESS; + +err_free_elements: + list_for_each_entry_safe(el, temp, &sec_req->elements, head) { + list_del(&el->head); + sec_alg_free_el(el, info); + } + if (crypto_skcipher_ivsize(atfm)) + dma_unmap_single(info->dev, sec_req->dma_iv, + crypto_skcipher_ivsize(atfm), + DMA_BIDIRECTIONAL); +err_unmap_out_sg: + if (skreq->src != skreq->dst) + sec_unmap_sg_on_err(skreq->dst, steps, splits_out, + splits_out_nents, sec_req->len_out, + info->dev); +err_unmap_in_sg: + sec_unmap_sg_on_err(skreq->src, steps, splits_in, splits_in_nents, + sec_req->len_in, info->dev); +err_free_split_sizes: + kfree(split_sizes); + + return ret; +} + +static int sec_alg_skcipher_encrypt(struct skcipher_request *req) +{ + return sec_alg_skcipher_crypto(req, true); +} + +static int sec_alg_skcipher_decrypt(struct skcipher_request *req) +{ + return sec_alg_skcipher_crypto(req, false); +} + +static int sec_alg_skcipher_init(struct crypto_skcipher *tfm) +{ + struct sec_alg_tfm_ctx *ctx = crypto_skcipher_ctx(tfm); + + mutex_init(&ctx->lock); + INIT_LIST_HEAD(&ctx->backlog); + crypto_skcipher_set_reqsize(tfm, sizeof(struct sec_request)); + + ctx->queue = sec_queue_alloc_start_safe(); + if (IS_ERR(ctx->queue)) + return PTR_ERR(ctx->queue); + + mutex_init(&ctx->queue->queuelock); + ctx->queue->havesoftqueue = false; + + return 0; +} + +static void sec_alg_skcipher_exit(struct crypto_skcipher *tfm) +{ + struct sec_alg_tfm_ctx *ctx = crypto_skcipher_ctx(tfm); + struct device *dev = ctx->queue->dev_info->dev; + + if (ctx->key) { + memzero_explicit(ctx->key, SEC_MAX_CIPHER_KEY); + dma_free_coherent(dev, SEC_MAX_CIPHER_KEY, ctx->key, + ctx->pkey); + } + sec_queue_stop_release(ctx->queue); +} + +static int sec_alg_skcipher_init_with_queue(struct crypto_skcipher *tfm) +{ + struct sec_alg_tfm_ctx *ctx = crypto_skcipher_ctx(tfm); + int ret; + + ret = sec_alg_skcipher_init(tfm); + if (ret) + return ret; + + INIT_KFIFO(ctx->queue->softqueue); + ret = kfifo_alloc(&ctx->queue->softqueue, 512, GFP_KERNEL); + if (ret) { + sec_alg_skcipher_exit(tfm); + return ret; + } + ctx->queue->havesoftqueue = true; + + return 0; +} + +static void sec_alg_skcipher_exit_with_queue(struct crypto_skcipher *tfm) +{ + struct sec_alg_tfm_ctx *ctx = crypto_skcipher_ctx(tfm); + + kfifo_free(&ctx->queue->softqueue); + sec_alg_skcipher_exit(tfm); +} + +static struct skcipher_alg sec_algs[] = { + { + .base = { + .cra_name = "ecb(aes)", + .cra_driver_name = "hisi_sec_aes_ecb", + .cra_priority = 4001, + .cra_flags = CRYPTO_ALG_ASYNC, + .cra_blocksize = AES_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct sec_alg_tfm_ctx), + .cra_alignmask = 0, + .cra_module = THIS_MODULE, + }, + .init = sec_alg_skcipher_init, + .exit = sec_alg_skcipher_exit, + .setkey = sec_alg_skcipher_setkey_aes_ecb, + .decrypt = sec_alg_skcipher_decrypt, + .encrypt = sec_alg_skcipher_encrypt, + .min_keysize = AES_MIN_KEY_SIZE, + .max_keysize = AES_MAX_KEY_SIZE, + .ivsize = 0, + }, { + .base = { + .cra_name = "cbc(aes)", + .cra_driver_name = "hisi_sec_aes_cbc", + .cra_priority = 4001, + .cra_flags = CRYPTO_ALG_ASYNC, + .cra_blocksize = AES_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct sec_alg_tfm_ctx), + .cra_alignmask = 0, + .cra_module = THIS_MODULE, + }, + .init = sec_alg_skcipher_init_with_queue, + .exit = sec_alg_skcipher_exit_with_queue, + .setkey = sec_alg_skcipher_setkey_aes_cbc, + .decrypt = sec_alg_skcipher_decrypt, + .encrypt = sec_alg_skcipher_encrypt, + .min_keysize = AES_MIN_KEY_SIZE, + .max_keysize = AES_MAX_KEY_SIZE, + .ivsize = AES_BLOCK_SIZE, + }, { + .base = { + .cra_name = "ctr(aes)", + .cra_driver_name = "hisi_sec_aes_ctr", + .cra_priority = 4001, + .cra_flags = CRYPTO_ALG_ASYNC, + .cra_blocksize = AES_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct sec_alg_tfm_ctx), + .cra_alignmask = 0, + .cra_module = THIS_MODULE, + }, + .init = sec_alg_skcipher_init_with_queue, + .exit = sec_alg_skcipher_exit_with_queue, + .setkey = sec_alg_skcipher_setkey_aes_ctr, + .decrypt = sec_alg_skcipher_decrypt, + .encrypt = sec_alg_skcipher_encrypt, + .min_keysize = AES_MIN_KEY_SIZE, + .max_keysize = AES_MAX_KEY_SIZE, + .ivsize = AES_BLOCK_SIZE, + }, { + .base = { + .cra_name = "xts(aes)", + .cra_driver_name = "hisi_sec_aes_xts", + .cra_priority = 4001, + .cra_flags = CRYPTO_ALG_ASYNC, + .cra_blocksize = AES_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct sec_alg_tfm_ctx), + .cra_alignmask = 0, + .cra_module = THIS_MODULE, + }, + .init = sec_alg_skcipher_init, + .exit = sec_alg_skcipher_exit, + .setkey = sec_alg_skcipher_setkey_aes_xts, + .decrypt = sec_alg_skcipher_decrypt, + .encrypt = sec_alg_skcipher_encrypt, + .min_keysize = 2 * AES_MIN_KEY_SIZE, + .max_keysize = 2 * AES_MAX_KEY_SIZE, + .ivsize = AES_BLOCK_SIZE, + }, { + /* Unable to find any test vectors so untested */ + .base = { + .cra_name = "ecb(des)", + .cra_driver_name = "hisi_sec_des_ecb", + .cra_priority = 4001, + .cra_flags = CRYPTO_ALG_ASYNC, + .cra_blocksize = DES_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct sec_alg_tfm_ctx), + .cra_alignmask = 0, + .cra_module = THIS_MODULE, + }, + .init = sec_alg_skcipher_init, + .exit = sec_alg_skcipher_exit, + .setkey = sec_alg_skcipher_setkey_des_ecb, + .decrypt = sec_alg_skcipher_decrypt, + .encrypt = sec_alg_skcipher_encrypt, + .min_keysize = DES_KEY_SIZE, + .max_keysize = DES_KEY_SIZE, + .ivsize = 0, + }, { + .base = { + .cra_name = "cbc(des)", + .cra_driver_name = "hisi_sec_des_cbc", + .cra_priority = 4001, + .cra_flags = CRYPTO_ALG_ASYNC, + .cra_blocksize = DES_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct sec_alg_tfm_ctx), + .cra_alignmask = 0, + .cra_module = THIS_MODULE, + }, + .init = sec_alg_skcipher_init_with_queue, + .exit = sec_alg_skcipher_exit_with_queue, + .setkey = sec_alg_skcipher_setkey_des_cbc, + .decrypt = sec_alg_skcipher_decrypt, + .encrypt = sec_alg_skcipher_encrypt, + .min_keysize = DES_KEY_SIZE, + .max_keysize = DES_KEY_SIZE, + .ivsize = DES_BLOCK_SIZE, + }, { + .base = { + .cra_name = "cbc(des3_ede)", + .cra_driver_name = "hisi_sec_3des_cbc", + .cra_priority = 4001, + .cra_flags = CRYPTO_ALG_ASYNC, + .cra_blocksize = DES3_EDE_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct sec_alg_tfm_ctx), + .cra_alignmask = 0, + .cra_module = THIS_MODULE, + }, + .init = sec_alg_skcipher_init_with_queue, + .exit = sec_alg_skcipher_exit_with_queue, + .setkey = sec_alg_skcipher_setkey_3des_cbc, + .decrypt = sec_alg_skcipher_decrypt, + .encrypt = sec_alg_skcipher_encrypt, + .min_keysize = DES3_EDE_KEY_SIZE, + .max_keysize = DES3_EDE_KEY_SIZE, + .ivsize = DES3_EDE_BLOCK_SIZE, + }, { + .base = { + .cra_name = "ecb(des3_ede)", + .cra_driver_name = "hisi_sec_3des_ecb", + .cra_priority = 4001, + .cra_flags = CRYPTO_ALG_ASYNC, + .cra_blocksize = DES3_EDE_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct sec_alg_tfm_ctx), + .cra_alignmask = 0, + .cra_module = THIS_MODULE, + }, + .init = sec_alg_skcipher_init, + .exit = sec_alg_skcipher_exit, + .setkey = sec_alg_skcipher_setkey_3des_ecb, + .decrypt = sec_alg_skcipher_decrypt, + .encrypt = sec_alg_skcipher_encrypt, + .min_keysize = DES3_EDE_KEY_SIZE, + .max_keysize = DES3_EDE_KEY_SIZE, + .ivsize = 0, + } +}; + +int sec_algs_register(void) +{ + int ret = 0; + + mutex_lock(&algs_lock); + if (++active_devs != 1) + goto unlock; + + ret = crypto_register_skciphers(sec_algs, ARRAY_SIZE(sec_algs)); + if (ret) + --active_devs; +unlock: + mutex_unlock(&algs_lock); + + return ret; +} + +void sec_algs_unregister(void) +{ + mutex_lock(&algs_lock); + if (--active_devs != 0) + goto unlock; + crypto_unregister_skciphers(sec_algs, ARRAY_SIZE(sec_algs)); + +unlock: + mutex_unlock(&algs_lock); +} diff --git a/drivers/crypto/hisilicon/sec/sec_drv.c b/drivers/crypto/hisilicon/sec/sec_drv.c new file mode 100644 index 000000000000..c1ee4e7bf996 --- /dev/null +++ b/drivers/crypto/hisilicon/sec/sec_drv.c @@ -0,0 +1,1323 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Driver for the Hisilicon SEC units found on Hip06 Hip07 + * + * Copyright (c) 2016-2017 Hisilicon Limited. + */ +#include <linux/acpi.h> +#include <linux/atomic.h> +#include <linux/delay.h> +#include <linux/dma-direction.h> +#include <linux/dma-mapping.h> +#include <linux/dmapool.h> +#include <linux/io.h> +#include <linux/iommu.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/irqreturn.h> +#include <linux/mm.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/slab.h> + +#include "sec_drv.h" + +#define SEC_QUEUE_AR_FROCE_ALLOC 0 +#define SEC_QUEUE_AR_FROCE_NOALLOC 1 +#define SEC_QUEUE_AR_FROCE_DIS 2 + +#define SEC_QUEUE_AW_FROCE_ALLOC 0 +#define SEC_QUEUE_AW_FROCE_NOALLOC 1 +#define SEC_QUEUE_AW_FROCE_DIS 2 + +/* SEC_ALGSUB registers */ +#define SEC_ALGSUB_CLK_EN_REG 0x03b8 +#define SEC_ALGSUB_CLK_DIS_REG 0x03bc +#define SEC_ALGSUB_CLK_ST_REG 0x535c +#define SEC_ALGSUB_RST_REQ_REG 0x0aa8 +#define SEC_ALGSUB_RST_DREQ_REG 0x0aac +#define SEC_ALGSUB_RST_ST_REG 0x5a54 +#define SEC_ALGSUB_RST_ST_IS_RST BIT(0) + +#define SEC_ALGSUB_BUILD_RST_REQ_REG 0x0ab8 +#define SEC_ALGSUB_BUILD_RST_DREQ_REG 0x0abc +#define SEC_ALGSUB_BUILD_RST_ST_REG 0x5a5c +#define SEC_ALGSUB_BUILD_RST_ST_IS_RST BIT(0) + +#define SEC_SAA_BASE 0x00001000UL + +/* SEC_SAA registers */ +#define SEC_SAA_CTRL_REG(x) ((x) * SEC_SAA_ADDR_SIZE) +#define SEC_SAA_CTRL_GET_QM_EN BIT(0) + +#define SEC_ST_INTMSK1_REG 0x0200 +#define SEC_ST_RINT1_REG 0x0400 +#define SEC_ST_INTSTS1_REG 0x0600 +#define SEC_BD_MNG_STAT_REG 0x0800 +#define SEC_PARSING_STAT_REG 0x0804 +#define SEC_LOAD_TIME_OUT_CNT_REG 0x0808 +#define SEC_CORE_WORK_TIME_OUT_CNT_REG 0x080c +#define SEC_BACK_TIME_OUT_CNT_REG 0x0810 +#define SEC_BD1_PARSING_RD_TIME_OUT_CNT_REG 0x0814 +#define SEC_BD1_PARSING_WR_TIME_OUT_CNT_REG 0x0818 +#define SEC_BD2_PARSING_RD_TIME_OUT_CNT_REG 0x081c +#define SEC_BD2_PARSING_WR_TIME_OUT_CNT_REG 0x0820 +#define SEC_SAA_ACC_REG 0x083c +#define SEC_BD_NUM_CNT_IN_SEC_REG 0x0858 +#define SEC_LOAD_WORK_TIME_CNT_REG 0x0860 +#define SEC_CORE_WORK_WORK_TIME_CNT_REG 0x0864 +#define SEC_BACK_WORK_TIME_CNT_REG 0x0868 +#define SEC_SAA_IDLE_TIME_CNT_REG 0x086c +#define SEC_SAA_CLK_CNT_REG 0x0870 + +/* SEC_COMMON registers */ +#define SEC_CLK_EN_REG 0x0000 +#define SEC_CTRL_REG 0x0004 + +#define SEC_COMMON_CNT_CLR_CE_REG 0x0008 +#define SEC_COMMON_CNT_CLR_CE_CLEAR BIT(0) +#define SEC_COMMON_CNT_CLR_CE_SNAP_EN BIT(1) + +#define SEC_SECURE_CTRL_REG 0x000c +#define SEC_AXI_CACHE_CFG_REG 0x0010 +#define SEC_AXI_QOS_CFG_REG 0x0014 +#define SEC_IPV4_MASK_TABLE_REG 0x0020 +#define SEC_IPV6_MASK_TABLE_X_REG(x) (0x0024 + (x) * 4) +#define SEC_FSM_MAX_CNT_REG 0x0064 + +#define SEC_CTRL2_REG 0x0068 +#define SEC_CTRL2_DATA_AXI_RD_OTSD_CFG_M GENMASK(3, 0) +#define SEC_CTRL2_DATA_AXI_RD_OTSD_CFG_S 0 +#define SEC_CTRL2_DATA_AXI_WR_OTSD_CFG_M GENMASK(6, 4) +#define SEC_CTRL2_DATA_AXI_WR_OTSD_CFG_S 4 +#define SEC_CTRL2_CLK_GATE_EN BIT(7) +#define SEC_CTRL2_ENDIAN_BD BIT(8) +#define SEC_CTRL2_ENDIAN_BD_TYPE BIT(9) + +#define SEC_CNT_PRECISION_CFG_REG 0x006c +#define SEC_DEBUG_BD_CFG_REG 0x0070 +#define SEC_DEBUG_BD_CFG_WB_NORMAL BIT(0) +#define SEC_DEBUG_BD_CFG_WB_EN BIT(1) + +#define SEC_Q_SIGHT_SEL 0x0074 +#define SEC_Q_SIGHT_HIS_CLR 0x0078 +#define SEC_Q_VMID_CFG_REG(q) (0x0100 + (q) * 4) +#define SEC_Q_WEIGHT_CFG_REG(q) (0x200 + (q) * 4) +#define SEC_STAT_CLR_REG 0x0a00 +#define SEC_SAA_IDLE_CNT_CLR_REG 0x0a04 +#define SEC_QM_CPL_Q_IDBUF_DFX_CFG_REG 0x0b00 +#define SEC_QM_CPL_Q_IDBUF_DFX_RESULT_REG 0x0b04 +#define SEC_QM_BD_DFX_CFG_REG 0x0b08 +#define SEC_QM_BD_DFX_RESULT_REG 0x0b0c +#define SEC_QM_BDID_DFX_RESULT_REG 0x0b10 +#define SEC_QM_BD_DFIFO_STATUS_REG 0x0b14 +#define SEC_QM_BD_DFX_CFG2_REG 0x0b1c +#define SEC_QM_BD_DFX_RESULT2_REG 0x0b20 +#define SEC_QM_BD_IDFIFO_STATUS_REG 0x0b18 +#define SEC_QM_BD_DFIFO_STATUS2_REG 0x0b28 +#define SEC_QM_BD_IDFIFO_STATUS2_REG 0x0b2c + +#define SEC_HASH_IPV4_MASK 0xfff00000 +#define SEC_MAX_SAA_NUM 0xa +#define SEC_SAA_ADDR_SIZE 0x1000 + +#define SEC_Q_INIT_REG 0x0 +#define SEC_Q_INIT_WO_STAT_CLEAR 0x2 +#define SEC_Q_INIT_AND_STAT_CLEAR 0x3 + +#define SEC_Q_CFG_REG 0x8 +#define SEC_Q_CFG_REORDER BIT(0) + +#define SEC_Q_PROC_NUM_CFG_REG 0x10 +#define SEC_QUEUE_ENB_REG 0x18 + +#define SEC_Q_DEPTH_CFG_REG 0x50 +#define SEC_Q_DEPTH_CFG_DEPTH_M GENMASK(11, 0) +#define SEC_Q_DEPTH_CFG_DEPTH_S 0 + +#define SEC_Q_BASE_HADDR_REG 0x54 +#define SEC_Q_BASE_LADDR_REG 0x58 +#define SEC_Q_WR_PTR_REG 0x5c +#define SEC_Q_OUTORDER_BASE_HADDR_REG 0x60 +#define SEC_Q_OUTORDER_BASE_LADDR_REG 0x64 +#define SEC_Q_OUTORDER_RD_PTR_REG 0x68 +#define SEC_Q_OT_TH_REG 0x6c + +#define SEC_Q_ARUSER_CFG_REG 0x70 +#define SEC_Q_ARUSER_CFG_FA BIT(0) +#define SEC_Q_ARUSER_CFG_FNA BIT(1) +#define SEC_Q_ARUSER_CFG_RINVLD BIT(2) +#define SEC_Q_ARUSER_CFG_PKG BIT(3) + +#define SEC_Q_AWUSER_CFG_REG 0x74 +#define SEC_Q_AWUSER_CFG_FA BIT(0) +#define SEC_Q_AWUSER_CFG_FNA BIT(1) +#define SEC_Q_AWUSER_CFG_PKG BIT(2) + +#define SEC_Q_ERR_BASE_HADDR_REG 0x7c +#define SEC_Q_ERR_BASE_LADDR_REG 0x80 +#define SEC_Q_CFG_VF_NUM_REG 0x84 +#define SEC_Q_SOFT_PROC_PTR_REG 0x88 +#define SEC_Q_FAIL_INT_MSK_REG 0x300 +#define SEC_Q_FLOW_INT_MKS_REG 0x304 +#define SEC_Q_FAIL_RINT_REG 0x400 +#define SEC_Q_FLOW_RINT_REG 0x404 +#define SEC_Q_FAIL_INT_STATUS_REG 0x500 +#define SEC_Q_FLOW_INT_STATUS_REG 0x504 +#define SEC_Q_STATUS_REG 0x600 +#define SEC_Q_RD_PTR_REG 0x604 +#define SEC_Q_PRO_PTR_REG 0x608 +#define SEC_Q_OUTORDER_WR_PTR_REG 0x60c +#define SEC_Q_OT_CNT_STATUS_REG 0x610 +#define SEC_Q_INORDER_BD_NUM_ST_REG 0x650 +#define SEC_Q_INORDER_GET_FLAG_ST_REG 0x654 +#define SEC_Q_INORDER_ADD_FLAG_ST_REG 0x658 +#define SEC_Q_INORDER_TASK_INT_NUM_LEFT_ST_REG 0x65c +#define SEC_Q_RD_DONE_PTR_REG 0x660 +#define SEC_Q_CPL_Q_BD_NUM_ST_REG 0x700 +#define SEC_Q_CPL_Q_PTR_ST_REG 0x704 +#define SEC_Q_CPL_Q_H_ADDR_ST_REG 0x708 +#define SEC_Q_CPL_Q_L_ADDR_ST_REG 0x70c +#define SEC_Q_CPL_TASK_INT_NUM_LEFT_ST_REG 0x710 +#define SEC_Q_WRR_ID_CHECK_REG 0x714 +#define SEC_Q_CPLQ_FULL_CHECK_REG 0x718 +#define SEC_Q_SUCCESS_BD_CNT_REG 0x800 +#define SEC_Q_FAIL_BD_CNT_REG 0x804 +#define SEC_Q_GET_BD_CNT_REG 0x808 +#define SEC_Q_IVLD_CNT_REG 0x80c +#define SEC_Q_BD_PROC_GET_CNT_REG 0x810 +#define SEC_Q_BD_PROC_DONE_CNT_REG 0x814 +#define SEC_Q_LAT_CLR_REG 0x850 +#define SEC_Q_PKT_LAT_MAX_REG 0x854 +#define SEC_Q_PKT_LAT_AVG_REG 0x858 +#define SEC_Q_PKT_LAT_MIN_REG 0x85c +#define SEC_Q_ID_CLR_CFG_REG 0x900 +#define SEC_Q_1ST_BD_ERR_ID_REG 0x904 +#define SEC_Q_1ST_AUTH_FAIL_ID_REG 0x908 +#define SEC_Q_1ST_RD_ERR_ID_REG 0x90c +#define SEC_Q_1ST_ECC2_ERR_ID_REG 0x910 +#define SEC_Q_1ST_IVLD_ID_REG 0x914 +#define SEC_Q_1ST_BD_WR_ERR_ID_REG 0x918 +#define SEC_Q_1ST_ERR_BD_WR_ERR_ID_REG 0x91c +#define SEC_Q_1ST_BD_MAC_WR_ERR_ID_REG 0x920 + +struct sec_debug_bd_info { +#define SEC_DEBUG_BD_INFO_SOFT_ERR_CHECK_M GENMASK(22, 0) + u32 soft_err_check; +#define SEC_DEBUG_BD_INFO_HARD_ERR_CHECK_M GENMASK(9, 0) + u32 hard_err_check; + u32 icv_mac1st_word; +#define SEC_DEBUG_BD_INFO_GET_ID_M GENMASK(19, 0) + u32 sec_get_id; + /* W4---W15 */ + u32 reserv_left[12]; +}; + +struct sec_out_bd_info { +#define SEC_OUT_BD_INFO_Q_ID_M GENMASK(11, 0) +#define SEC_OUT_BD_INFO_ECC_2BIT_ERR BIT(14) + u16 data; +}; + +#define SEC_MAX_DEVICES 8 +static struct sec_dev_info *sec_devices[SEC_MAX_DEVICES]; +static DEFINE_MUTEX(sec_id_lock); + +static int sec_queue_map_io(struct sec_queue *queue) +{ + struct device *dev = queue->dev_info->dev; + struct resource *res; + + res = platform_get_resource(to_platform_device(dev), + IORESOURCE_MEM, + 2 + queue->queue_id); + if (!res) { + dev_err(dev, "Failed to get queue %d memory resource\n", + queue->queue_id); + return -ENOMEM; + } + queue->regs = ioremap(res->start, resource_size(res)); + if (!queue->regs) + return -ENOMEM; + + return 0; +} + +static void sec_queue_unmap_io(struct sec_queue *queue) +{ + iounmap(queue->regs); +} + +static int sec_queue_ar_pkgattr(struct sec_queue *queue, u32 ar_pkg) +{ + void __iomem *addr = queue->regs + SEC_Q_ARUSER_CFG_REG; + u32 regval; + + regval = readl_relaxed(addr); + if (ar_pkg) + regval |= SEC_Q_ARUSER_CFG_PKG; + else + regval &= ~SEC_Q_ARUSER_CFG_PKG; + writel_relaxed(regval, addr); + + return 0; +} + +static int sec_queue_aw_pkgattr(struct sec_queue *queue, u32 aw_pkg) +{ + void __iomem *addr = queue->regs + SEC_Q_AWUSER_CFG_REG; + u32 regval; + + regval = readl_relaxed(addr); + regval |= SEC_Q_AWUSER_CFG_PKG; + writel_relaxed(regval, addr); + + return 0; +} + +static int sec_clk_en(struct sec_dev_info *info) +{ + void __iomem *base = info->regs[SEC_COMMON]; + u32 i = 0; + + writel_relaxed(0x7, base + SEC_ALGSUB_CLK_EN_REG); + do { + usleep_range(1000, 10000); + if ((readl_relaxed(base + SEC_ALGSUB_CLK_ST_REG) & 0x7) == 0x7) + return 0; + i++; + } while (i < 10); + dev_err(info->dev, "sec clock enable fail!\n"); + + return -EIO; +} + +static int sec_clk_dis(struct sec_dev_info *info) +{ + void __iomem *base = info->regs[SEC_COMMON]; + u32 i = 0; + + writel_relaxed(0x7, base + SEC_ALGSUB_CLK_DIS_REG); + do { + usleep_range(1000, 10000); + if ((readl_relaxed(base + SEC_ALGSUB_CLK_ST_REG) & 0x7) == 0) + return 0; + i++; + } while (i < 10); + dev_err(info->dev, "sec clock disable fail!\n"); + + return -EIO; +} + +static int sec_reset_whole_module(struct sec_dev_info *info) +{ + void __iomem *base = info->regs[SEC_COMMON]; + bool is_reset, b_is_reset; + u32 i = 0; + + writel_relaxed(1, base + SEC_ALGSUB_RST_REQ_REG); + writel_relaxed(1, base + SEC_ALGSUB_BUILD_RST_REQ_REG); + while (1) { + usleep_range(1000, 10000); + is_reset = readl_relaxed(base + SEC_ALGSUB_RST_ST_REG) & + SEC_ALGSUB_RST_ST_IS_RST; + b_is_reset = readl_relaxed(base + SEC_ALGSUB_BUILD_RST_ST_REG) & + SEC_ALGSUB_BUILD_RST_ST_IS_RST; + if (is_reset && b_is_reset) + break; + i++; + if (i > 10) { + dev_err(info->dev, "Reset req failed\n"); + return -EIO; + } + } + + i = 0; + writel_relaxed(1, base + SEC_ALGSUB_RST_DREQ_REG); + writel_relaxed(1, base + SEC_ALGSUB_BUILD_RST_DREQ_REG); + while (1) { + usleep_range(1000, 10000); + is_reset = readl_relaxed(base + SEC_ALGSUB_RST_ST_REG) & + SEC_ALGSUB_RST_ST_IS_RST; + b_is_reset = readl_relaxed(base + SEC_ALGSUB_BUILD_RST_ST_REG) & + SEC_ALGSUB_BUILD_RST_ST_IS_RST; + if (!is_reset && !b_is_reset) + break; + + i++; + if (i > 10) { + dev_err(info->dev, "Reset dreq failed\n"); + return -EIO; + } + } + + return 0; +} + +static void sec_bd_endian_little(struct sec_dev_info *info) +{ + void __iomem *addr = info->regs[SEC_SAA] + SEC_CTRL2_REG; + u32 regval; + + regval = readl_relaxed(addr); + regval &= ~(SEC_CTRL2_ENDIAN_BD | SEC_CTRL2_ENDIAN_BD_TYPE); + writel_relaxed(regval, addr); +} + +/* + * sec_cache_config - configure optimum cache placement + */ +static void sec_cache_config(struct sec_dev_info *info) +{ + struct iommu_domain *domain; + void __iomem *addr = info->regs[SEC_SAA] + SEC_CTRL_REG; + + domain = iommu_get_domain_for_dev(info->dev); + + /* Check that translation is occurring */ + if (domain && (domain->type & __IOMMU_DOMAIN_PAGING)) + writel_relaxed(0x44cf9e, addr); + else + writel_relaxed(0x4cfd9, addr); +} + +static void sec_data_axiwr_otsd_cfg(struct sec_dev_info *info, u32 cfg) +{ + void __iomem *addr = info->regs[SEC_SAA] + SEC_CTRL2_REG; + u32 regval; + + regval = readl_relaxed(addr); + regval &= ~SEC_CTRL2_DATA_AXI_WR_OTSD_CFG_M; + regval |= (cfg << SEC_CTRL2_DATA_AXI_WR_OTSD_CFG_S) & + SEC_CTRL2_DATA_AXI_WR_OTSD_CFG_M; + writel_relaxed(regval, addr); +} + +static void sec_data_axird_otsd_cfg(struct sec_dev_info *info, u32 cfg) +{ + void __iomem *addr = info->regs[SEC_SAA] + SEC_CTRL2_REG; + u32 regval; + + regval = readl_relaxed(addr); + regval &= ~SEC_CTRL2_DATA_AXI_RD_OTSD_CFG_M; + regval |= (cfg << SEC_CTRL2_DATA_AXI_RD_OTSD_CFG_S) & + SEC_CTRL2_DATA_AXI_RD_OTSD_CFG_M; + writel_relaxed(regval, addr); +} + +static void sec_clk_gate_en(struct sec_dev_info *info, bool clkgate) +{ + void __iomem *addr = info->regs[SEC_SAA] + SEC_CTRL2_REG; + u32 regval; + + regval = readl_relaxed(addr); + if (clkgate) + regval |= SEC_CTRL2_CLK_GATE_EN; + else + regval &= ~SEC_CTRL2_CLK_GATE_EN; + writel_relaxed(regval, addr); +} + +static void sec_comm_cnt_cfg(struct sec_dev_info *info, bool clr_ce) +{ + void __iomem *addr = info->regs[SEC_SAA] + SEC_COMMON_CNT_CLR_CE_REG; + u32 regval; + + regval = readl_relaxed(addr); + if (clr_ce) + regval |= SEC_COMMON_CNT_CLR_CE_CLEAR; + else + regval &= ~SEC_COMMON_CNT_CLR_CE_CLEAR; + writel_relaxed(regval, addr); +} + +static void sec_commsnap_en(struct sec_dev_info *info, bool snap_en) +{ + void __iomem *addr = info->regs[SEC_SAA] + SEC_COMMON_CNT_CLR_CE_REG; + u32 regval; + + regval = readl_relaxed(addr); + if (snap_en) + regval |= SEC_COMMON_CNT_CLR_CE_SNAP_EN; + else + regval &= ~SEC_COMMON_CNT_CLR_CE_SNAP_EN; + writel_relaxed(regval, addr); +} + +static void sec_ipv6_hashmask(struct sec_dev_info *info, u32 hash_mask[]) +{ + void __iomem *base = info->regs[SEC_SAA]; + int i; + + for (i = 0; i < 10; i++) + writel_relaxed(hash_mask[0], + base + SEC_IPV6_MASK_TABLE_X_REG(i)); +} + +static int sec_ipv4_hashmask(struct sec_dev_info *info, u32 hash_mask) +{ + if (hash_mask & SEC_HASH_IPV4_MASK) { + dev_err(info->dev, "Sec Ipv4 Hash Mask Input Error!\n "); + return -EINVAL; + } + + writel_relaxed(hash_mask, + info->regs[SEC_SAA] + SEC_IPV4_MASK_TABLE_REG); + + return 0; +} + +static void sec_set_dbg_bd_cfg(struct sec_dev_info *info, u32 cfg) +{ + void __iomem *addr = info->regs[SEC_SAA] + SEC_DEBUG_BD_CFG_REG; + u32 regval; + + regval = readl_relaxed(addr); + /* Always disable write back of normal bd */ + regval &= ~SEC_DEBUG_BD_CFG_WB_NORMAL; + + if (cfg) + regval &= ~SEC_DEBUG_BD_CFG_WB_EN; + else + regval |= SEC_DEBUG_BD_CFG_WB_EN; + + writel_relaxed(regval, addr); +} + +static void sec_saa_getqm_en(struct sec_dev_info *info, u32 saa_indx, u32 en) +{ + void __iomem *addr = info->regs[SEC_SAA] + SEC_SAA_BASE + + SEC_SAA_CTRL_REG(saa_indx); + u32 regval; + + regval = readl_relaxed(addr); + if (en) + regval |= SEC_SAA_CTRL_GET_QM_EN; + else + regval &= ~SEC_SAA_CTRL_GET_QM_EN; + writel_relaxed(regval, addr); +} + +static void sec_saa_int_mask(struct sec_dev_info *info, u32 saa_indx, + u32 saa_int_mask) +{ + writel_relaxed(saa_int_mask, + info->regs[SEC_SAA] + SEC_SAA_BASE + SEC_ST_INTMSK1_REG + + saa_indx * SEC_SAA_ADDR_SIZE); +} + +static void sec_streamid(struct sec_dev_info *info, int i) +{ + #define SEC_SID 0x600 + #define SEC_VMID 0 + + writel_relaxed((SEC_VMID | ((SEC_SID & 0xffff) << 8)), + info->regs[SEC_SAA] + SEC_Q_VMID_CFG_REG(i)); +} + +static void sec_queue_ar_alloc(struct sec_queue *queue, u32 alloc) +{ + void __iomem *addr = queue->regs + SEC_Q_ARUSER_CFG_REG; + u32 regval; + + regval = readl_relaxed(addr); + if (alloc == SEC_QUEUE_AR_FROCE_ALLOC) { + regval |= SEC_Q_ARUSER_CFG_FA; + regval &= ~SEC_Q_ARUSER_CFG_FNA; + } else { + regval &= ~SEC_Q_ARUSER_CFG_FA; + regval |= SEC_Q_ARUSER_CFG_FNA; + } + + writel_relaxed(regval, addr); +} + +static void sec_queue_aw_alloc(struct sec_queue *queue, u32 alloc) +{ + void __iomem *addr = queue->regs + SEC_Q_AWUSER_CFG_REG; + u32 regval; + + regval = readl_relaxed(addr); + if (alloc == SEC_QUEUE_AW_FROCE_ALLOC) { + regval |= SEC_Q_AWUSER_CFG_FA; + regval &= ~SEC_Q_AWUSER_CFG_FNA; + } else { + regval &= ~SEC_Q_AWUSER_CFG_FA; + regval |= SEC_Q_AWUSER_CFG_FNA; + } + + writel_relaxed(regval, addr); +} + +static void sec_queue_reorder(struct sec_queue *queue, bool reorder) +{ + void __iomem *base = queue->regs; + u32 regval; + + regval = readl_relaxed(base + SEC_Q_CFG_REG); + if (reorder) + regval |= SEC_Q_CFG_REORDER; + else + regval &= ~SEC_Q_CFG_REORDER; + writel_relaxed(regval, base + SEC_Q_CFG_REG); +} + +static void sec_queue_depth(struct sec_queue *queue, u32 depth) +{ + void __iomem *addr = queue->regs + SEC_Q_DEPTH_CFG_REG; + u32 regval; + + regval = readl_relaxed(addr); + regval &= ~SEC_Q_DEPTH_CFG_DEPTH_M; + regval |= (depth << SEC_Q_DEPTH_CFG_DEPTH_S) & SEC_Q_DEPTH_CFG_DEPTH_M; + + writel_relaxed(regval, addr); +} + +static void sec_queue_cmdbase_addr(struct sec_queue *queue, u64 addr) +{ + writel_relaxed(upper_32_bits(addr), queue->regs + SEC_Q_BASE_HADDR_REG); + writel_relaxed(lower_32_bits(addr), queue->regs + SEC_Q_BASE_LADDR_REG); +} + +static void sec_queue_outorder_addr(struct sec_queue *queue, u64 addr) +{ + writel_relaxed(upper_32_bits(addr), + queue->regs + SEC_Q_OUTORDER_BASE_HADDR_REG); + writel_relaxed(lower_32_bits(addr), + queue->regs + SEC_Q_OUTORDER_BASE_LADDR_REG); +} + +static void sec_queue_errbase_addr(struct sec_queue *queue, u64 addr) +{ + writel_relaxed(upper_32_bits(addr), + queue->regs + SEC_Q_ERR_BASE_HADDR_REG); + writel_relaxed(lower_32_bits(addr), + queue->regs + SEC_Q_ERR_BASE_LADDR_REG); +} + +static void sec_queue_irq_disable(struct sec_queue *queue) +{ + writel_relaxed((u32)~0, queue->regs + SEC_Q_FLOW_INT_MKS_REG); +} + +static void sec_queue_irq_enable(struct sec_queue *queue) +{ + writel_relaxed(0, queue->regs + SEC_Q_FLOW_INT_MKS_REG); +} + +static void sec_queue_abn_irq_disable(struct sec_queue *queue) +{ + writel_relaxed((u32)~0, queue->regs + SEC_Q_FAIL_INT_MSK_REG); +} + +static void sec_queue_stop(struct sec_queue *queue) +{ + disable_irq(queue->task_irq); + sec_queue_irq_disable(queue); + writel_relaxed(0x0, queue->regs + SEC_QUEUE_ENB_REG); +} + +static void sec_queue_start(struct sec_queue *queue) +{ + sec_queue_irq_enable(queue); + enable_irq(queue->task_irq); + queue->expected = 0; + writel_relaxed(SEC_Q_INIT_AND_STAT_CLEAR, queue->regs + SEC_Q_INIT_REG); + writel_relaxed(0x1, queue->regs + SEC_QUEUE_ENB_REG); +} + +static struct sec_queue *sec_alloc_queue(struct sec_dev_info *info) +{ + int i; + + mutex_lock(&info->dev_lock); + + /* Get the first idle queue in SEC device */ + for (i = 0; i < SEC_Q_NUM; i++) + if (!info->queues[i].in_use) { + info->queues[i].in_use = true; + info->queues_in_use++; + mutex_unlock(&info->dev_lock); + + return &info->queues[i]; + } + mutex_unlock(&info->dev_lock); + + return ERR_PTR(-ENODEV); +} + +static int sec_queue_free(struct sec_queue *queue) +{ + struct sec_dev_info *info = queue->dev_info; + + if (queue->queue_id >= SEC_Q_NUM) { + dev_err(info->dev, "No queue %d\n", queue->queue_id); + return -ENODEV; + } + + if (!queue->in_use) { + dev_err(info->dev, "Queue %d is idle\n", queue->queue_id); + return -ENODEV; + } + + mutex_lock(&info->dev_lock); + queue->in_use = false; + info->queues_in_use--; + mutex_unlock(&info->dev_lock); + + return 0; +} + +static irqreturn_t sec_isr_handle_th(int irq, void *q) +{ + sec_queue_irq_disable(q); + return IRQ_WAKE_THREAD; +} + +static irqreturn_t sec_isr_handle(int irq, void *q) +{ + struct sec_queue *queue = q; + struct sec_queue_ring_cmd *msg_ring = &queue->ring_cmd; + struct sec_queue_ring_cq *cq_ring = &queue->ring_cq; + struct sec_out_bd_info *outorder_msg; + struct sec_bd_info *msg; + u32 ooo_read, ooo_write; + void __iomem *base = queue->regs; + int q_id; + + ooo_read = readl(base + SEC_Q_OUTORDER_RD_PTR_REG); + ooo_write = readl(base + SEC_Q_OUTORDER_WR_PTR_REG); + outorder_msg = cq_ring->vaddr + ooo_read; + q_id = outorder_msg->data & SEC_OUT_BD_INFO_Q_ID_M; + msg = msg_ring->vaddr + q_id; + + while ((ooo_write != ooo_read) && msg->w0 & SEC_BD_W0_DONE) { + /* + * Must be before callback otherwise blocks adding other chained + * elements + */ + set_bit(q_id, queue->unprocessed); + if (q_id == queue->expected) + while (test_bit(queue->expected, queue->unprocessed)) { + clear_bit(queue->expected, queue->unprocessed); + msg = msg_ring->vaddr + queue->expected; + msg->w0 &= ~SEC_BD_W0_DONE; + msg_ring->callback(msg, + queue->shadow[queue->expected]); + queue->shadow[queue->expected] = NULL; + queue->expected = (queue->expected + 1) % + SEC_QUEUE_LEN; + atomic_dec(&msg_ring->used); + } + + ooo_read = (ooo_read + 1) % SEC_QUEUE_LEN; + writel(ooo_read, base + SEC_Q_OUTORDER_RD_PTR_REG); + ooo_write = readl(base + SEC_Q_OUTORDER_WR_PTR_REG); + outorder_msg = cq_ring->vaddr + ooo_read; + q_id = outorder_msg->data & SEC_OUT_BD_INFO_Q_ID_M; + msg = msg_ring->vaddr + q_id; + } + + sec_queue_irq_enable(queue); + + return IRQ_HANDLED; +} + +static int sec_queue_irq_init(struct sec_queue *queue) +{ + struct sec_dev_info *info = queue->dev_info; + int irq = queue->task_irq; + int ret; + + ret = request_threaded_irq(irq, sec_isr_handle_th, sec_isr_handle, + IRQF_TRIGGER_RISING, queue->name, queue); + if (ret) { + dev_err(info->dev, "request irq(%d) failed %d\n", irq, ret); + return ret; + } + disable_irq(irq); + + return 0; +} + +static int sec_queue_irq_uninit(struct sec_queue *queue) +{ + free_irq(queue->task_irq, queue); + + return 0; +} + +static struct sec_dev_info *sec_device_get(void) +{ + struct sec_dev_info *sec_dev = NULL; + struct sec_dev_info *this_sec_dev; + int least_busy_n = SEC_Q_NUM + 1; + int i; + + /* Find which one is least busy and use that first */ + for (i = 0; i < SEC_MAX_DEVICES; i++) { + this_sec_dev = sec_devices[i]; + if (this_sec_dev && + this_sec_dev->queues_in_use < least_busy_n) { + least_busy_n = this_sec_dev->queues_in_use; + sec_dev = this_sec_dev; + } + } + + return sec_dev; +} + +static struct sec_queue *sec_queue_alloc_start(struct sec_dev_info *info) +{ + struct sec_queue *queue; + + queue = sec_alloc_queue(info); + if (IS_ERR(queue)) { + dev_err(info->dev, "alloc sec queue failed! %ld\n", + PTR_ERR(queue)); + return queue; + } + + sec_queue_start(queue); + + return queue; +} + +/** + * sec_queue_alloc_start_safe - get a hw queue from appropriate instance + * + * This function does extremely simplistic load balancing. It does not take into + * account NUMA locality of the accelerator, or which cpu has requested the + * queue. Future work may focus on optimizing this in order to improve full + * machine throughput. + */ +struct sec_queue *sec_queue_alloc_start_safe(void) +{ + struct sec_dev_info *info; + struct sec_queue *queue = ERR_PTR(-ENODEV); + + mutex_lock(&sec_id_lock); + info = sec_device_get(); + if (!info) + goto unlock; + + queue = sec_queue_alloc_start(info); + +unlock: + mutex_unlock(&sec_id_lock); + + return queue; +} + +/** + * sec_queue_stop_release() - free up a hw queue for reuse + * @queue: The queue we are done with. + * + * This will stop the current queue, terminanting any transactions + * that are inflight an return it to the pool of available hw queuess + */ +int sec_queue_stop_release(struct sec_queue *queue) +{ + struct device *dev = queue->dev_info->dev; + int ret; + + sec_queue_stop(queue); + + ret = sec_queue_free(queue); + if (ret) + dev_err(dev, "Releasing queue failed %d\n", ret); + + return ret; +} + +/** + * sec_queue_empty() - Is this hardware queue currently empty. + * + * We need to know if we have an empty queue for some of the chaining modes + * as if it is not empty we may need to hold the message in a software queue + * until the hw queue is drained. + */ +bool sec_queue_empty(struct sec_queue *queue) +{ + struct sec_queue_ring_cmd *msg_ring = &queue->ring_cmd; + + return !atomic_read(&msg_ring->used); +} + +/** + * sec_queue_send() - queue up a single operation in the hw queue + * @queue: The queue in which to put the message + * @msg: The message + * @ctx: Context to be put in the shadow array and passed back to cb on result. + * + * This function will return -EAGAIN if the queue is currently full. + */ +int sec_queue_send(struct sec_queue *queue, struct sec_bd_info *msg, void *ctx) +{ + struct sec_queue_ring_cmd *msg_ring = &queue->ring_cmd; + void __iomem *base = queue->regs; + u32 write, read; + + mutex_lock(&msg_ring->lock); + read = readl(base + SEC_Q_RD_PTR_REG); + write = readl(base + SEC_Q_WR_PTR_REG); + if (write == read && atomic_read(&msg_ring->used) == SEC_QUEUE_LEN) { + mutex_unlock(&msg_ring->lock); + return -EAGAIN; + } + memcpy(msg_ring->vaddr + write, msg, sizeof(*msg)); + queue->shadow[write] = ctx; + write = (write + 1) % SEC_QUEUE_LEN; + + /* Ensure content updated before queue advance */ + wmb(); + writel(write, base + SEC_Q_WR_PTR_REG); + + atomic_inc(&msg_ring->used); + mutex_unlock(&msg_ring->lock); + + return 0; +} + +bool sec_queue_can_enqueue(struct sec_queue *queue, int num) +{ + struct sec_queue_ring_cmd *msg_ring = &queue->ring_cmd; + + return SEC_QUEUE_LEN - atomic_read(&msg_ring->used) >= num; +} + +static void sec_queue_hw_init(struct sec_queue *queue) +{ + sec_queue_ar_alloc(queue, SEC_QUEUE_AR_FROCE_NOALLOC); + sec_queue_aw_alloc(queue, SEC_QUEUE_AR_FROCE_NOALLOC); + sec_queue_ar_pkgattr(queue, 1); + sec_queue_aw_pkgattr(queue, 1); + + /* Enable out of order queue */ + sec_queue_reorder(queue, true); + + /* Interrupt after a single complete element */ + writel_relaxed(1, queue->regs + SEC_Q_PROC_NUM_CFG_REG); + + sec_queue_depth(queue, SEC_QUEUE_LEN - 1); + + sec_queue_cmdbase_addr(queue, queue->ring_cmd.paddr); + + sec_queue_outorder_addr(queue, queue->ring_cq.paddr); + + sec_queue_errbase_addr(queue, queue->ring_db.paddr); + + writel_relaxed(0x100, queue->regs + SEC_Q_OT_TH_REG); + + sec_queue_abn_irq_disable(queue); + sec_queue_irq_disable(queue); + writel_relaxed(SEC_Q_INIT_AND_STAT_CLEAR, queue->regs + SEC_Q_INIT_REG); +} + +static int sec_hw_init(struct sec_dev_info *info) +{ + struct iommu_domain *domain; + u32 sec_ipv4_mask = 0; + u32 sec_ipv6_mask[10] = {}; + u32 i, ret; + + domain = iommu_get_domain_for_dev(info->dev); + + /* + * Enable all available processing unit clocks. + * Only the first cluster is usable with translations. + */ + if (domain && (domain->type & __IOMMU_DOMAIN_PAGING)) + info->num_saas = 5; + + else + info->num_saas = 10; + + writel_relaxed(GENMASK(info->num_saas - 1, 0), + info->regs[SEC_SAA] + SEC_CLK_EN_REG); + + /* 32 bit little endian */ + sec_bd_endian_little(info); + + sec_cache_config(info); + + /* Data axi port write and read outstanding config as per datasheet */ + sec_data_axiwr_otsd_cfg(info, 0x7); + sec_data_axird_otsd_cfg(info, 0x7); + + /* Enable clock gating */ + sec_clk_gate_en(info, true); + + /* Set CNT_CYC register not read clear */ + sec_comm_cnt_cfg(info, false); + + /* Enable CNT_CYC */ + sec_commsnap_en(info, false); + + writel_relaxed((u32)~0, info->regs[SEC_SAA] + SEC_FSM_MAX_CNT_REG); + + ret = sec_ipv4_hashmask(info, sec_ipv4_mask); + if (ret) { + dev_err(info->dev, "Failed to set ipv4 hashmask %d\n", ret); + return -EIO; + } + + sec_ipv6_hashmask(info, sec_ipv6_mask); + + /* do not use debug bd */ + sec_set_dbg_bd_cfg(info, 0); + + if (domain && (domain->type & __IOMMU_DOMAIN_PAGING)) { + for (i = 0; i < SEC_Q_NUM; i++) { + sec_streamid(info, i); + /* Same QoS for all queues */ + writel_relaxed(0x3f, + info->regs[SEC_SAA] + + SEC_Q_WEIGHT_CFG_REG(i)); + } + } + + for (i = 0; i < info->num_saas; i++) { + sec_saa_getqm_en(info, i, 1); + sec_saa_int_mask(info, i, 0); + } + + return 0; +} + +static void sec_hw_exit(struct sec_dev_info *info) +{ + int i; + + for (i = 0; i < SEC_MAX_SAA_NUM; i++) { + sec_saa_int_mask(info, i, (u32)~0); + sec_saa_getqm_en(info, i, 0); + } +} + +static void sec_queue_base_init(struct sec_dev_info *info, + struct sec_queue *queue, int queue_id) +{ + queue->dev_info = info; + queue->queue_id = queue_id; + snprintf(queue->name, sizeof(queue->name), + "%s_%d", dev_name(info->dev), queue->queue_id); +} + +static int sec_map_io(struct sec_dev_info *info, struct platform_device *pdev) +{ + struct resource *res; + int i; + + for (i = 0; i < SEC_NUM_ADDR_REGIONS; i++) { + res = platform_get_resource(pdev, IORESOURCE_MEM, i); + + if (!res) { + dev_err(info->dev, "Memory resource %d not found\n", i); + return -EINVAL; + } + + info->regs[i] = devm_ioremap(info->dev, res->start, + resource_size(res)); + if (!info->regs[i]) { + dev_err(info->dev, + "Memory resource %d could not be remapped\n", + i); + return -EINVAL; + } + } + + return 0; +} + +static int sec_base_init(struct sec_dev_info *info, + struct platform_device *pdev) +{ + int ret; + + ret = sec_map_io(info, pdev); + if (ret) + return ret; + + ret = sec_clk_en(info); + if (ret) + return ret; + + ret = sec_reset_whole_module(info); + if (ret) + goto sec_clk_disable; + + ret = sec_hw_init(info); + if (ret) + goto sec_clk_disable; + + return 0; + +sec_clk_disable: + sec_clk_dis(info); + + return ret; +} + +static void sec_base_exit(struct sec_dev_info *info) +{ + sec_hw_exit(info); + sec_clk_dis(info); +} + +#define SEC_Q_CMD_SIZE \ + round_up(SEC_QUEUE_LEN * sizeof(struct sec_bd_info), PAGE_SIZE) +#define SEC_Q_CQ_SIZE \ + round_up(SEC_QUEUE_LEN * sizeof(struct sec_out_bd_info), PAGE_SIZE) +#define SEC_Q_DB_SIZE \ + round_up(SEC_QUEUE_LEN * sizeof(struct sec_debug_bd_info), PAGE_SIZE) + +static int sec_queue_res_cfg(struct sec_queue *queue) +{ + struct device *dev = queue->dev_info->dev; + struct sec_queue_ring_cmd *ring_cmd = &queue->ring_cmd; + struct sec_queue_ring_cq *ring_cq = &queue->ring_cq; + struct sec_queue_ring_db *ring_db = &queue->ring_db; + int ret; + + ring_cmd->vaddr = dma_zalloc_coherent(dev, SEC_Q_CMD_SIZE, + &ring_cmd->paddr, + GFP_KERNEL); + if (!ring_cmd->vaddr) + return -ENOMEM; + + atomic_set(&ring_cmd->used, 0); + mutex_init(&ring_cmd->lock); + ring_cmd->callback = sec_alg_callback; + + ring_cq->vaddr = dma_zalloc_coherent(dev, SEC_Q_CQ_SIZE, + &ring_cq->paddr, + GFP_KERNEL); + if (!ring_cq->vaddr) { + ret = -ENOMEM; + goto err_free_ring_cmd; + } + + ring_db->vaddr = dma_zalloc_coherent(dev, SEC_Q_DB_SIZE, + &ring_db->paddr, + GFP_KERNEL); + if (!ring_db->vaddr) { + ret = -ENOMEM; + goto err_free_ring_cq; + } + queue->task_irq = platform_get_irq(to_platform_device(dev), + queue->queue_id * 2 + 1); + if (queue->task_irq <= 0) { + ret = -EINVAL; + goto err_free_ring_db; + } + + return 0; + +err_free_ring_db: + dma_free_coherent(dev, SEC_Q_DB_SIZE, queue->ring_db.vaddr, + queue->ring_db.paddr); +err_free_ring_cq: + dma_free_coherent(dev, SEC_Q_CQ_SIZE, queue->ring_cq.vaddr, + queue->ring_cq.paddr); +err_free_ring_cmd: + dma_free_coherent(dev, SEC_Q_CMD_SIZE, queue->ring_cmd.vaddr, + queue->ring_cmd.paddr); + + return ret; +} + +static void sec_queue_free_ring_pages(struct sec_queue *queue) +{ + struct device *dev = queue->dev_info->dev; + + dma_free_coherent(dev, SEC_Q_DB_SIZE, queue->ring_db.vaddr, + queue->ring_db.paddr); + dma_free_coherent(dev, SEC_Q_CQ_SIZE, queue->ring_cq.vaddr, + queue->ring_cq.paddr); + dma_free_coherent(dev, SEC_Q_CMD_SIZE, queue->ring_cmd.vaddr, + queue->ring_cmd.paddr); +} + +static int sec_queue_config(struct sec_dev_info *info, struct sec_queue *queue, + int queue_id) +{ + int ret; + + sec_queue_base_init(info, queue, queue_id); + + ret = sec_queue_res_cfg(queue); + if (ret) + return ret; + + ret = sec_queue_map_io(queue); + if (ret) { + dev_err(info->dev, "Queue map failed %d\n", ret); + sec_queue_free_ring_pages(queue); + return ret; + } + + sec_queue_hw_init(queue); + + return 0; +} + +static void sec_queue_unconfig(struct sec_dev_info *info, + struct sec_queue *queue) +{ + sec_queue_unmap_io(queue); + sec_queue_free_ring_pages(queue); +} + +static int sec_id_alloc(struct sec_dev_info *info) +{ + int ret = 0; + int i; + + mutex_lock(&sec_id_lock); + + for (i = 0; i < SEC_MAX_DEVICES; i++) + if (!sec_devices[i]) + break; + if (i == SEC_MAX_DEVICES) { + ret = -ENOMEM; + goto unlock; + } + info->sec_id = i; + sec_devices[info->sec_id] = info; + +unlock: + mutex_unlock(&sec_id_lock); + + return ret; +} + +static void sec_id_free(struct sec_dev_info *info) +{ + mutex_lock(&sec_id_lock); + sec_devices[info->sec_id] = NULL; + mutex_unlock(&sec_id_lock); +} + +static int sec_probe(struct platform_device *pdev) +{ + struct sec_dev_info *info; + struct device *dev = &pdev->dev; + int i, j; + int ret; + + ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)); + if (ret) { + dev_err(dev, "Failed to set 64 bit dma mask %d", ret); + return -ENODEV; + } + + info = devm_kzalloc(dev, (sizeof(*info)), GFP_KERNEL); + if (!info) + return -ENOMEM; + + info->dev = dev; + mutex_init(&info->dev_lock); + + info->hw_sgl_pool = dmam_pool_create("sgl", dev, + sizeof(struct sec_hw_sgl), 64, 0); + if (!info->hw_sgl_pool) { + dev_err(dev, "Failed to create sec sgl dma pool\n"); + return -ENOMEM; + } + + ret = sec_base_init(info, pdev); + if (ret) { + dev_err(dev, "Base initialization fail! %d\n", ret); + return ret; + } + + for (i = 0; i < SEC_Q_NUM; i++) { + ret = sec_queue_config(info, &info->queues[i], i); + if (ret) + goto queues_unconfig; + + ret = sec_queue_irq_init(&info->queues[i]); + if (ret) { + sec_queue_unconfig(info, &info->queues[i]); + goto queues_unconfig; + } + } + + ret = sec_algs_register(); + if (ret) { + dev_err(dev, "Failed to register algorithms with crypto %d\n", + ret); + goto queues_unconfig; + } + + platform_set_drvdata(pdev, info); + + ret = sec_id_alloc(info); + if (ret) + goto algs_unregister; + + return 0; + +algs_unregister: + sec_algs_unregister(); +queues_unconfig: + for (j = i - 1; j >= 0; j--) { + sec_queue_irq_uninit(&info->queues[j]); + sec_queue_unconfig(info, &info->queues[j]); + } + sec_base_exit(info); + + return ret; +} + +static int sec_remove(struct platform_device *pdev) +{ + struct sec_dev_info *info = platform_get_drvdata(pdev); + int i; + + /* Unexpose as soon as possible, reuse during remove is fine */ + sec_id_free(info); + + sec_algs_unregister(); + + for (i = 0; i < SEC_Q_NUM; i++) { + sec_queue_irq_uninit(&info->queues[i]); + sec_queue_unconfig(info, &info->queues[i]); + } + + sec_base_exit(info); + + return 0; +} + +static const __maybe_unused struct of_device_id sec_match[] = { + { .compatible = "hisilicon,hip06-sec" }, + { .compatible = "hisilicon,hip07-sec" }, + {} +}; +MODULE_DEVICE_TABLE(of, sec_match); + +static const __maybe_unused struct acpi_device_id sec_acpi_match[] = { + { "HISI02C1", 0 }, + { } +}; +MODULE_DEVICE_TABLE(acpi, sec_acpi_match); + +static struct platform_driver sec_driver = { + .probe = sec_probe, + .remove = sec_remove, + .driver = { + .name = "hisi_sec_platform_driver", + .of_match_table = sec_match, + .acpi_match_table = ACPI_PTR(sec_acpi_match), + }, +}; +module_platform_driver(sec_driver); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Hisilicon Security Accelerators"); +MODULE_AUTHOR("Zaibo Xu <xuzaibo@huawei.com"); +MODULE_AUTHOR("Jonathan Cameron <jonathan.cameron@huawei.com>"); diff --git a/drivers/crypto/hisilicon/sec/sec_drv.h b/drivers/crypto/hisilicon/sec/sec_drv.h new file mode 100644 index 000000000000..2d2f186674ba --- /dev/null +++ b/drivers/crypto/hisilicon/sec/sec_drv.h @@ -0,0 +1,428 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2016-2017 Hisilicon Limited. */ + +#ifndef _SEC_DRV_H_ +#define _SEC_DRV_H_ + +#include <crypto/algapi.h> +#include <linux/kfifo.h> + +#define SEC_MAX_SGE_NUM 64 +#define SEC_HW_RING_NUM 3 + +#define SEC_CMD_RING 0 +#define SEC_OUTORDER_RING 1 +#define SEC_DBG_RING 2 + +/* A reasonable length to balance memory use against flexibility */ +#define SEC_QUEUE_LEN 512 + +#define SEC_MAX_SGE_NUM 64 + +struct sec_bd_info { +#define SEC_BD_W0_T_LEN_M GENMASK(4, 0) +#define SEC_BD_W0_T_LEN_S 0 + +#define SEC_BD_W0_C_WIDTH_M GENMASK(6, 5) +#define SEC_BD_W0_C_WIDTH_S 5 +#define SEC_C_WIDTH_AES_128BIT 0 +#define SEC_C_WIDTH_AES_8BIT 1 +#define SEC_C_WIDTH_AES_1BIT 2 +#define SEC_C_WIDTH_DES_64BIT 0 +#define SEC_C_WIDTH_DES_8BIT 1 +#define SEC_C_WIDTH_DES_1BIT 2 + +#define SEC_BD_W0_C_MODE_M GENMASK(9, 7) +#define SEC_BD_W0_C_MODE_S 7 +#define SEC_C_MODE_ECB 0 +#define SEC_C_MODE_CBC 1 +#define SEC_C_MODE_CTR 4 +#define SEC_C_MODE_CCM 5 +#define SEC_C_MODE_GCM 6 +#define SEC_C_MODE_XTS 7 + +#define SEC_BD_W0_SEQ BIT(10) +#define SEC_BD_W0_DE BIT(11) +#define SEC_BD_W0_DAT_SKIP_M GENMASK(13, 12) +#define SEC_BD_W0_DAT_SKIP_S 12 +#define SEC_BD_W0_C_GRAN_SIZE_19_16_M GENMASK(17, 14) +#define SEC_BD_W0_C_GRAN_SIZE_19_16_S 14 + +#define SEC_BD_W0_CIPHER_M GENMASK(19, 18) +#define SEC_BD_W0_CIPHER_S 18 +#define SEC_CIPHER_NULL 0 +#define SEC_CIPHER_ENCRYPT 1 +#define SEC_CIPHER_DECRYPT 2 + +#define SEC_BD_W0_AUTH_M GENMASK(21, 20) +#define SEC_BD_W0_AUTH_S 20 +#define SEC_AUTH_NULL 0 +#define SEC_AUTH_MAC 1 +#define SEC_AUTH_VERIF 2 + +#define SEC_BD_W0_AI_GEN BIT(22) +#define SEC_BD_W0_CI_GEN BIT(23) +#define SEC_BD_W0_NO_HPAD BIT(24) +#define SEC_BD_W0_HM_M GENMASK(26, 25) +#define SEC_BD_W0_HM_S 25 +#define SEC_BD_W0_ICV_OR_SKEY_EN_M GENMASK(28, 27) +#define SEC_BD_W0_ICV_OR_SKEY_EN_S 27 + +/* Multi purpose field - gran size bits for send, flag for recv */ +#define SEC_BD_W0_FLAG_M GENMASK(30, 29) +#define SEC_BD_W0_C_GRAN_SIZE_21_20_M GENMASK(30, 29) +#define SEC_BD_W0_FLAG_S 29 +#define SEC_BD_W0_C_GRAN_SIZE_21_20_S 29 + +#define SEC_BD_W0_DONE BIT(31) + u32 w0; + +#define SEC_BD_W1_AUTH_GRAN_SIZE_M GENMASK(21, 0) +#define SEC_BD_W1_AUTH_GRAN_SIZE_S 0 +#define SEC_BD_W1_M_KEY_EN BIT(22) +#define SEC_BD_W1_BD_INVALID BIT(23) +#define SEC_BD_W1_ADDR_TYPE BIT(24) + +#define SEC_BD_W1_A_ALG_M GENMASK(28, 25) +#define SEC_BD_W1_A_ALG_S 25 +#define SEC_A_ALG_SHA1 0 +#define SEC_A_ALG_SHA256 1 +#define SEC_A_ALG_MD5 2 +#define SEC_A_ALG_SHA224 3 +#define SEC_A_ALG_HMAC_SHA1 8 +#define SEC_A_ALG_HMAC_SHA224 10 +#define SEC_A_ALG_HMAC_SHA256 11 +#define SEC_A_ALG_HMAC_MD5 12 +#define SEC_A_ALG_AES_XCBC 13 +#define SEC_A_ALG_AES_CMAC 14 + +#define SEC_BD_W1_C_ALG_M GENMASK(31, 29) +#define SEC_BD_W1_C_ALG_S 29 +#define SEC_C_ALG_DES 0 +#define SEC_C_ALG_3DES 1 +#define SEC_C_ALG_AES 2 + + u32 w1; + +#define SEC_BD_W2_C_GRAN_SIZE_15_0_M GENMASK(15, 0) +#define SEC_BD_W2_C_GRAN_SIZE_15_0_S 0 +#define SEC_BD_W2_GRAN_NUM_M GENMASK(31, 16) +#define SEC_BD_W2_GRAN_NUM_S 16 + u32 w2; + +#define SEC_BD_W3_AUTH_LEN_OFFSET_M GENMASK(9, 0) +#define SEC_BD_W3_AUTH_LEN_OFFSET_S 0 +#define SEC_BD_W3_CIPHER_LEN_OFFSET_M GENMASK(19, 10) +#define SEC_BD_W3_CIPHER_LEN_OFFSET_S 10 +#define SEC_BD_W3_MAC_LEN_M GENMASK(24, 20) +#define SEC_BD_W3_MAC_LEN_S 20 +#define SEC_BD_W3_A_KEY_LEN_M GENMASK(29, 25) +#define SEC_BD_W3_A_KEY_LEN_S 25 +#define SEC_BD_W3_C_KEY_LEN_M GENMASK(31, 30) +#define SEC_BD_W3_C_KEY_LEN_S 30 +#define SEC_KEY_LEN_AES_128 0 +#define SEC_KEY_LEN_AES_192 1 +#define SEC_KEY_LEN_AES_256 2 +#define SEC_KEY_LEN_DES 1 +#define SEC_KEY_LEN_3DES_3_KEY 1 +#define SEC_KEY_LEN_3DES_2_KEY 3 + u32 w3; + + /* W4,5 */ + union { + u32 authkey_addr_lo; + u32 authiv_addr_lo; + }; + union { + u32 authkey_addr_hi; + u32 authiv_addr_hi; + }; + + /* W6,7 */ + u32 cipher_key_addr_lo; + u32 cipher_key_addr_hi; + + /* W8,9 */ + u32 cipher_iv_addr_lo; + u32 cipher_iv_addr_hi; + + /* W10,11 */ + u32 data_addr_lo; + u32 data_addr_hi; + + /* W12,13 */ + u32 mac_addr_lo; + u32 mac_addr_hi; + + /* W14,15 */ + u32 cipher_destin_addr_lo; + u32 cipher_destin_addr_hi; +}; + +enum sec_mem_region { + SEC_COMMON = 0, + SEC_SAA, + SEC_NUM_ADDR_REGIONS +}; + +#define SEC_NAME_SIZE 64 +#define SEC_Q_NUM 16 + + +/** + * struct sec_queue_ring_cmd - store information about a SEC HW cmd ring + * @used: Local counter used to cheaply establish if the ring is empty. + * @lock: Protect against simultaneous adjusting of the read and write pointers. + * @vaddr: Virtual address for the ram pages used for the ring. + * @paddr: Physical address of the dma mapped region of ram used for the ring. + * @callback: Callback function called on a ring element completing. + */ +struct sec_queue_ring_cmd { + atomic_t used; + struct mutex lock; + struct sec_bd_info *vaddr; + dma_addr_t paddr; + void (*callback)(struct sec_bd_info *resp, void *ctx); +}; + +struct sec_debug_bd_info; +struct sec_queue_ring_db { + struct sec_debug_bd_info *vaddr; + dma_addr_t paddr; +}; + +struct sec_out_bd_info; +struct sec_queue_ring_cq { + struct sec_out_bd_info *vaddr; + dma_addr_t paddr; +}; + +struct sec_dev_info; + +enum sec_cipher_alg { + SEC_C_DES_ECB_64, + SEC_C_DES_CBC_64, + + SEC_C_3DES_ECB_192_3KEY, + SEC_C_3DES_ECB_192_2KEY, + + SEC_C_3DES_CBC_192_3KEY, + SEC_C_3DES_CBC_192_2KEY, + + SEC_C_AES_ECB_128, + SEC_C_AES_ECB_192, + SEC_C_AES_ECB_256, + + SEC_C_AES_CBC_128, + SEC_C_AES_CBC_192, + SEC_C_AES_CBC_256, + + SEC_C_AES_CTR_128, + SEC_C_AES_CTR_192, + SEC_C_AES_CTR_256, + + SEC_C_AES_XTS_128, + SEC_C_AES_XTS_256, + + SEC_C_NULL, +}; + +/** + * struct sec_alg_tfm_ctx - hardware specific tranformation context + * @cipher_alg: Cipher algorithm enabled include encryption mode. + * @key: Key storage if required. + * @pkey: DMA address for the key storage. + * @req_template: Request template to save time on setup. + * @queue: The hardware queue associated with this tfm context. + * @lock: Protect key and pkey to ensure they are consistent + * @auth_buf: Current context buffer for auth operations. + * @backlog: The backlog queue used for cases where our buffers aren't + * large enough. + */ +struct sec_alg_tfm_ctx { + enum sec_cipher_alg cipher_alg; + u8 *key; + dma_addr_t pkey; + struct sec_bd_info req_template; + struct sec_queue *queue; + struct mutex lock; + u8 *auth_buf; + struct list_head backlog; +}; + +/** + * struct sec_request - data associate with a single crypto request + * @elements: List of subparts of this request (hardware size restriction) + * @num_elements: The number of subparts (used as an optimization) + * @lock: Protect elements of this structure against concurrent change. + * @tfm_ctx: hardware specific context. + * @len_in: length of in sgl from upper layers + * @len_out: length of out sgl from upper layers + * @dma_iv: initialization vector - phsyical address + * @err: store used to track errors across subelements of this request. + * @req_base: pointer to base element of associate crypto context. + * This is needed to allow shared handling skcipher, ahash etc. + * @cb: completion callback. + * @backlog_head: list head to allow backlog maintenance. + * + * The hardware is limited in the maximum size of data that it can + * process from a single BD. Typically this is fairly large (32MB) + * but still requires the complexity of splitting the incoming + * skreq up into a number of elements complete with appropriate + * iv chaining. + */ +struct sec_request { + struct list_head elements; + int num_elements; + struct mutex lock; + struct sec_alg_tfm_ctx *tfm_ctx; + int len_in; + int len_out; + dma_addr_t dma_iv; + int err; + struct crypto_async_request *req_base; + void (*cb)(struct sec_bd_info *resp, struct crypto_async_request *req); + struct list_head backlog_head; +}; + +/** + * struct sec_request_el - A subpart of a request. + * @head: allow us to attach this to the list in the sec_request + * @req: hardware block descriptor corresponding to this request subpart + * @in: hardware sgl for input - virtual address + * @dma_in: hardware sgl for input - physical address + * @sgl_in: scatterlist for this request subpart + * @out: hardware sgl for output - virtual address + * @dma_out: hardware sgl for output - physical address + * @sgl_out: scatterlist for this request subpart + * @sec_req: The request which this subpart forms a part of + * @el_length: Number of bytes in this subpart. Needed to locate + * last ivsize chunk for iv chaining. + */ +struct sec_request_el { + struct list_head head; + struct sec_bd_info req; + struct sec_hw_sgl *in; + dma_addr_t dma_in; + struct scatterlist *sgl_in; + struct sec_hw_sgl *out; + dma_addr_t dma_out; + struct scatterlist *sgl_out; + struct sec_request *sec_req; + size_t el_length; +}; + +/** + * struct sec_queue - All the information about a HW queue + * @dev_info: The parent SEC device to which this queue belongs. + * @task_irq: Completion interrupt for the queue. + * @name: Human readable queue description also used as irq name. + * @ring: The several HW rings associated with one queue. + * @regs: The iomapped device registers + * @queue_id: Index of the queue used for naming and resource selection. + * @in_use: Flag to say if the queue is in use. + * @expected: The next expected element to finish assuming we were in order. + * @uprocessed: A bitmap to track which OoO elements are done but not handled. + * @softqueue: A software queue used when chaining requirements prevent direct + * use of the hardware queues. + * @havesoftqueue: A flag to say we have a queues - as we may need one for the + * current mode. + * @queuelock: Protect the soft queue from concurrent changes to avoid some + * potential loss of data races. + * @shadow: Pointers back to the shadow copy of the hardware ring element + * need because we can't store any context reference in the bd element. + */ +struct sec_queue { + struct sec_dev_info *dev_info; + int task_irq; + char name[SEC_NAME_SIZE]; + struct sec_queue_ring_cmd ring_cmd; + struct sec_queue_ring_cq ring_cq; + struct sec_queue_ring_db ring_db; + void __iomem *regs; + u32 queue_id; + bool in_use; + int expected; + + DECLARE_BITMAP(unprocessed, SEC_QUEUE_LEN); + DECLARE_KFIFO_PTR(softqueue, typeof(struct sec_request_el *)); + bool havesoftqueue; + struct mutex queuelock; + void *shadow[SEC_QUEUE_LEN]; +}; + +/** + * struct sec_hw_sge: Track each of the 64 element SEC HW SGL entries + * @buf: The IOV dma address for this entry. + * @len: Length of this IOV. + * @pad: Reserved space. + */ +struct sec_hw_sge { + dma_addr_t buf; + unsigned int len; + unsigned int pad; +}; + +/** + * struct sec_hw_sgl: One hardware SGL entry. + * @next_sgl: The next entry if we need to chain dma address. Null if last. + * @entry_sum_in_chain: The full count of SGEs - only matters for first SGL. + * @entry_sum_in_sgl: The number of SGEs in this SGL element. + * @flag: Unused in skciphers. + * @serial_num: Unsued in skciphers. + * @cpuid: Currently unused. + * @data_bytes_in_sgl: Count of bytes from all SGEs in this SGL. + * @next: Virtual address used to stash the next sgl - useful in completion. + * @reserved: A reserved field not currently used. + * @sge_entries: The (up to) 64 Scatter Gather Entries, representing IOVs. + * @node: Currently unused. + */ +struct sec_hw_sgl { + dma_addr_t next_sgl; + u16 entry_sum_in_chain; + u16 entry_sum_in_sgl; + u32 flag; + u64 serial_num; + u32 cpuid; + u32 data_bytes_in_sgl; + struct sec_hw_sgl *next; + u64 reserved; + struct sec_hw_sge sge_entries[SEC_MAX_SGE_NUM]; + u8 node[16]; +}; + +struct dma_pool; + +/** + * struct sec_dev_info: The full SEC unit comprising queues and processors. + * @sec_id: Index used to track which SEC this is when more than one is present. + * @num_saas: The number of backed processors enabled. + * @regs: iomapped register regions shared by whole SEC unit. + * @dev_lock: Protects concurrent queue allocation / freeing for the SEC. + * @queues: The 16 queues that this SEC instance provides. + * @dev: Device pointer. + * @hw_sgl_pool: DMA pool used to mimise mapping for the scatter gather lists. + */ +struct sec_dev_info { + int sec_id; + int num_saas; + void __iomem *regs[SEC_NUM_ADDR_REGIONS]; + struct mutex dev_lock; + int queues_in_use; + struct sec_queue queues[SEC_Q_NUM]; + struct device *dev; + struct dma_pool *hw_sgl_pool; +}; + +int sec_queue_send(struct sec_queue *queue, struct sec_bd_info *msg, void *ctx); +bool sec_queue_can_enqueue(struct sec_queue *queue, int num); +int sec_queue_stop_release(struct sec_queue *queue); +struct sec_queue *sec_queue_alloc_start_safe(void); +bool sec_queue_empty(struct sec_queue *queue); + +/* Algorithm specific elements from sec_algs.c */ +void sec_alg_callback(struct sec_bd_info *resp, void *ctx); +int sec_algs_register(void); +void sec_algs_unregister(void); + +#endif /* _SEC_DRV_H_ */ |