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crypto: hisilicon/sec2 - Add pbuffer mode for SEC driver 

In the scenario of SMMU translation, the SEC performance of short messages
(<512Bytes) cannot meet our expectations. To avoid this, we reserve the
plat buffer (PBUF) memory for small packets when creating TFM.

Signed-off-by: Longfang Liu <liulongfang@huawei.com>
Signed-off-by: Zaibo Xu <xuzaibo@huawei.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Longfang Liu 2020-03-05 10:06:25 +08:00 committed by Herbert Xu
parent 2514f5595d
commit 74b58db8b7
2 changed files with 172 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/crypto/hisilicon/sec2/sec.h
View File

@ -11,6 +11,8 @@
/* Algorithm resource per hardware SEC queue */
struct sec_alg_res {
u8 *pbuf;
dma_addr_t pbuf_dma;
u8 *c_ivin;
dma_addr_t c_ivin_dma;
u8 *out_mac;
@ -50,6 +52,7 @@ struct sec_req {
/* Status of the SEC request */
bool fake_busy;
bool use_pbuf;
};
/**
@ -130,6 +133,7 @@ struct sec_ctx {
atomic_t dec_qcyclic;
enum sec_alg_type alg_type;
bool pbuf_supported;
struct sec_cipher_ctx c_ctx;
struct sec_auth_ctx a_ctx;
};

173
drivers/crypto/hisilicon/sec2/sec_crypto.c
View File

@ -48,6 +48,19 @@
#define SEC_MAX_MAC_LEN 64
#define SEC_MAX_AAD_LEN 65535
#define SEC_TOTAL_MAC_SZ (SEC_MAX_MAC_LEN * QM_Q_DEPTH)
#define SEC_PBUF_SZ 512
#define SEC_PBUF_IV_OFFSET SEC_PBUF_SZ
#define SEC_PBUF_MAC_OFFSET (SEC_PBUF_SZ + SEC_IV_SIZE)
#define SEC_PBUF_PKG (SEC_PBUF_SZ + SEC_IV_SIZE + \
SEC_MAX_MAC_LEN * 2)
#define SEC_PBUF_NUM (PAGE_SIZE / SEC_PBUF_PKG)
#define SEC_PBUF_PAGE_NUM (QM_Q_DEPTH / SEC_PBUF_NUM)
#define SEC_PBUF_LEFT_SZ (SEC_PBUF_PKG * (QM_Q_DEPTH - \
SEC_PBUF_PAGE_NUM * SEC_PBUF_NUM))
#define SEC_TOTAL_PBUF_SZ (PAGE_SIZE * SEC_PBUF_PAGE_NUM + \
SEC_PBUF_LEFT_SZ)
#define SEC_SQE_LEN_RATE 4
#define SEC_SQE_CFLAG 2
#define SEC_SQE_AEAD_FLAG 3
@ -246,6 +259,50 @@ static void sec_free_mac_resource(struct device *dev, struct sec_alg_res *res)
res->out_mac, res->out_mac_dma);
}
static void sec_free_pbuf_resource(struct device *dev, struct sec_alg_res *res)
{
if (res->pbuf)
dma_free_coherent(dev, SEC_TOTAL_PBUF_SZ,
res->pbuf, res->pbuf_dma);
}
/*
* To improve performance, pbuffer is used for
* small packets (< 512Bytes) as IOMMU translation using.
*/
static int sec_alloc_pbuf_resource(struct device *dev, struct sec_alg_res *res)
{
int pbuf_page_offset;
int i, j, k;
res->pbuf = dma_alloc_coherent(dev, SEC_TOTAL_PBUF_SZ,
&res->pbuf_dma, GFP_KERNEL);
if (!res->pbuf)
return -ENOMEM;
/*
* SEC_PBUF_PKG contains data pbuf, iv and
* out_mac : <SEC_PBUF|SEC_IV|SEC_MAC>
* Every PAGE contains six SEC_PBUF_PKG
* The sec_qp_ctx contains QM_Q_DEPTH numbers of SEC_PBUF_PKG
* So we need SEC_PBUF_PAGE_NUM numbers of PAGE
* for the SEC_TOTAL_PBUF_SZ
*/
for (i = 0; i <= SEC_PBUF_PAGE_NUM; i++) {
pbuf_page_offset = PAGE_SIZE * i;
for (j = 0; j < SEC_PBUF_NUM; j++) {
k = i * SEC_PBUF_NUM + j;
if (k == QM_Q_DEPTH)
break;
res[k].pbuf = res->pbuf +
j * SEC_PBUF_PKG + pbuf_page_offset;
res[k].pbuf_dma = res->pbuf_dma +
j * SEC_PBUF_PKG + pbuf_page_offset;
}
}
return 0;
}
static int sec_alg_resource_alloc(struct sec_ctx *ctx,
struct sec_qp_ctx *qp_ctx)
{
@ -262,6 +319,13 @@ static int sec_alg_resource_alloc(struct sec_ctx *ctx,
if (ret)
goto alloc_fail;
}
if (ctx->pbuf_supported) {
ret = sec_alloc_pbuf_resource(dev, res);
if (ret) {
dev_err(dev, "fail to alloc pbuf dma resource!\n");
goto alloc_fail;
}
}
return 0;
alloc_fail:
@ -277,6 +341,8 @@ static void sec_alg_resource_free(struct sec_ctx *ctx,
sec_free_civ_resource(dev, qp_ctx->res);
if (ctx->pbuf_supported)
sec_free_pbuf_resource(dev, qp_ctx->res);
if (ctx->alg_type == SEC_AEAD)
sec_free_mac_resource(dev, qp_ctx->res);
}
@ -369,6 +435,8 @@ static int sec_ctx_base_init(struct sec_ctx *ctx)
ctx->sec = sec;
ctx->hlf_q_num = sec->ctx_q_num >> 1;
ctx->pbuf_supported = ctx->sec->iommu_used;
/* Half of queue depth is taken as fake requests limit in the queue. */
ctx->fake_req_limit = QM_Q_DEPTH >> 1;
ctx->qp_ctx = kcalloc(sec->ctx_q_num, sizeof(struct sec_qp_ctx),
@ -591,6 +659,66 @@ GEN_SEC_SETKEY_FUNC(3des_cbc, SEC_CALG_3DES, SEC_CMODE_CBC)
GEN_SEC_SETKEY_FUNC(sm4_xts, SEC_CALG_SM4, SEC_CMODE_XTS)
GEN_SEC_SETKEY_FUNC(sm4_cbc, SEC_CALG_SM4, SEC_CMODE_CBC)
static int sec_cipher_pbuf_map(struct sec_ctx *ctx, struct sec_req *req,
struct scatterlist *src)
{
struct aead_request *aead_req = req->aead_req.aead_req;
struct sec_cipher_req *c_req = &req->c_req;
struct sec_qp_ctx *qp_ctx = req->qp_ctx;
struct device *dev = SEC_CTX_DEV(ctx);
int copy_size, pbuf_length;
int req_id = req->req_id;
if (ctx->alg_type == SEC_AEAD)
copy_size = aead_req->cryptlen + aead_req->assoclen;
else
copy_size = c_req->c_len;
pbuf_length = sg_copy_to_buffer(src, sg_nents(src),
qp_ctx->res[req_id].pbuf,
copy_size);
if (unlikely(pbuf_length != copy_size)) {
dev_err(dev, "copy src data to pbuf error!\n");
return -EINVAL;
}
c_req->c_in_dma = qp_ctx->res[req_id].pbuf_dma;
if (!c_req->c_in_dma) {
dev_err(dev, "fail to set pbuffer address!\n");
return -ENOMEM;
}
c_req->c_out_dma = c_req->c_in_dma;
return 0;
}
static void sec_cipher_pbuf_unmap(struct sec_ctx *ctx, struct sec_req *req,
struct scatterlist *dst)
{
struct aead_request *aead_req = req->aead_req.aead_req;
struct sec_cipher_req *c_req = &req->c_req;
struct sec_qp_ctx *qp_ctx = req->qp_ctx;
struct device *dev = SEC_CTX_DEV(ctx);
int copy_size, pbuf_length;
int req_id = req->req_id;
if (ctx->alg_type == SEC_AEAD)
copy_size = c_req->c_len + aead_req->assoclen;
else
copy_size = c_req->c_len;
pbuf_length = sg_copy_from_buffer(dst, sg_nents(dst),
qp_ctx->res[req_id].pbuf,
copy_size);
if (unlikely(pbuf_length != copy_size))
dev_err(dev, "copy pbuf data to dst error!\n");
}
static int sec_cipher_map(struct sec_ctx *ctx, struct sec_req *req,
struct scatterlist *src, struct scatterlist *dst)
{
@ -599,7 +727,20 @@ static int sec_cipher_map(struct sec_ctx *ctx, struct sec_req *req,
struct sec_qp_ctx *qp_ctx = req->qp_ctx;
struct sec_alg_res *res = &qp_ctx->res[req->req_id];
struct device *dev = SEC_CTX_DEV(ctx);
int ret;
if (req->use_pbuf) {
ret = sec_cipher_pbuf_map(ctx, req, src);
c_req->c_ivin = res->pbuf + SEC_PBUF_IV_OFFSET;
c_req->c_ivin_dma = res->pbuf_dma + SEC_PBUF_IV_OFFSET;
if (ctx->alg_type == SEC_AEAD) {
a_req->out_mac = res->pbuf + SEC_PBUF_MAC_OFFSET;
a_req->out_mac_dma = res->pbuf_dma +
SEC_PBUF_MAC_OFFSET;
}
return ret;
}
c_req->c_ivin = res->c_ivin;
c_req->c_ivin_dma = res->c_ivin_dma;
if (ctx->alg_type == SEC_AEAD) {
@ -642,10 +783,14 @@ static void sec_cipher_unmap(struct sec_ctx *ctx, struct sec_req *req,
struct sec_cipher_req *c_req = &req->c_req;
struct device *dev = SEC_CTX_DEV(ctx);
if (dst != src)
hisi_acc_sg_buf_unmap(dev, src, c_req->c_in);
if (req->use_pbuf) {
sec_cipher_pbuf_unmap(ctx, req, dst);
} else {
if (dst != src)
hisi_acc_sg_buf_unmap(dev, src, c_req->c_in);
hisi_acc_sg_buf_unmap(dev, dst, c_req->c_out);
hisi_acc_sg_buf_unmap(dev, dst, c_req->c_out);
}
}
static int sec_skcipher_sgl_map(struct sec_ctx *ctx, struct sec_req *req)
@ -844,7 +989,10 @@ static int sec_skcipher_bd_fill(struct sec_ctx *ctx, struct sec_req *req)
cipher = SEC_CIPHER_DEC << SEC_CIPHER_OFFSET;
sec_sqe->type_cipher_auth = bd_type | cipher;
sa_type = SEC_SGL << SEC_SRC_SGL_OFFSET;
if (req->use_pbuf)
sa_type = SEC_PBUF << SEC_SRC_SGL_OFFSET;
else
sa_type = SEC_SGL << SEC_SRC_SGL_OFFSET;
scene = SEC_COMM_SCENE << SEC_SCENE_OFFSET;
if (c_req->c_in_dma != c_req->c_out_dma)
de = 0x1 << SEC_DE_OFFSET;
@ -852,7 +1000,10 @@ static int sec_skcipher_bd_fill(struct sec_ctx *ctx, struct sec_req *req)
sec_sqe->sds_sa_type = (de | scene | sa_type);
/* Just set DST address type */
da_type = SEC_SGL << SEC_DST_SGL_OFFSET;
if (req->use_pbuf)
da_type = SEC_PBUF << SEC_DST_SGL_OFFSET;
else
da_type = SEC_SGL << SEC_DST_SGL_OFFSET;
sec_sqe->sdm_addr_type |= da_type;
sec_sqe->type2.clen_ivhlen |= cpu_to_le32(c_req->c_len);
@ -1215,6 +1366,12 @@ static int sec_skcipher_param_check(struct sec_ctx *ctx, struct sec_req *sreq)
return -EINVAL;
}
sreq->c_req.c_len = sk_req->cryptlen;
if (ctx->pbuf_supported && sk_req->cryptlen <= SEC_PBUF_SZ)
sreq->use_pbuf = true;
else
sreq->use_pbuf = false;
if (c_alg == SEC_CALG_3DES) {
if (unlikely(sk_req->cryptlen & (DES3_EDE_BLOCK_SIZE - 1))) {
dev_err(dev, "skcipher 3des input length error!\n");
@ -1334,6 +1491,12 @@ static int sec_aead_param_check(struct sec_ctx *ctx, struct sec_req *sreq)
return -EINVAL;
}
if (ctx->pbuf_supported && (req->cryptlen + req->assoclen) <=
SEC_PBUF_SZ)
sreq->use_pbuf = true;
else
sreq->use_pbuf = false;
/* Support AES only */
if (unlikely(c_alg != SEC_CALG_AES)) {
dev_err(SEC_CTX_DEV(ctx), "aead crypto alg error!\n");