[PATCH 12/12] crypto: caam - add crypto_engine support for HASH algorithms

From: Iuliana Prodan
Date: Sun Nov 17 2019 - 17:31:26 EST

Next message: Iuliana Prodan: "[PATCH 10/12] crypto: caam - add crypto_engine support for AEAD algorithms"
Previous message: Iuliana Prodan: "[PATCH 08/12] crypto: caam - support crypto_engine framework for SKCIPHER algorithms"
In reply to: Herbert Xu: "Re: [PATCH 08/12] crypto: caam - support crypto_engine framework for SKCIPHER algorithms"
Next in thread: Horia Geanta: "Re: [PATCH 12/12] crypto: caam - add crypto_engine support for HASH algorithms"
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Add crypto_engine support for HASH algorithms, to make use of
the engine queue.
The requests, with backlog flag, will be listed into crypto-engine
queue and processed by CAAM when free. In case the queue is empty,
the request is directly sent to CAAM.

Signed-off-by: Iuliana Prodan <iuliana.prodan@xxxxxxx>
---
drivers/crypto/caam/caamhash.c | 155 +++++++++++++++++++++++++++++------------
drivers/crypto/caam/jr.c | 3 +
2 files changed, 113 insertions(+), 45 deletions(-)

diff --git a/drivers/crypto/caam/caamhash.c b/drivers/crypto/caam/caamhash.c
index d9de3dc..7f9ffde 100644
--- a/drivers/crypto/caam/caamhash.c
+++ b/drivers/crypto/caam/caamhash.c
@@ -65,6 +65,7 @@
#include "sg_sw_sec4.h"
#include "key_gen.h"
#include "caamhash_desc.h"
+#include <crypto/engine.h>

#define CAAM_CRA_PRIORITY 3000

@@ -86,6 +87,7 @@ static struct list_head hash_list;

/* ahash per-session context */
struct caam_hash_ctx {
+ struct crypto_engine_ctx enginectx;
u32 sh_desc_update[DESC_HASH_MAX_USED_LEN] ____cacheline_aligned;
u32 sh_desc_update_first[DESC_HASH_MAX_USED_LEN] ____cacheline_aligned;
u32 sh_desc_fin[DESC_HASH_MAX_USED_LEN] ____cacheline_aligned;
@@ -112,10 +114,13 @@ struct caam_hash_state {
u8 buf_1[CAAM_MAX_HASH_BLOCK_SIZE] ____cacheline_aligned;
int buflen_1;
u8 caam_ctx[MAX_CTX_LEN] ____cacheline_aligned;
- int (*update)(struct ahash_request *req);
+ int (*update)(struct ahash_request *req) ____cacheline_aligned;
int (*final)(struct ahash_request *req);
int (*finup)(struct ahash_request *req);
int current_buf;
+ struct ahash_edesc *edesc;
+ void (*ahash_op_done)(struct device *jrdev, u32 *desc, u32 err,
+ void *context);
};

struct caam_export_state {
@@ -125,6 +130,9 @@ struct caam_export_state {
int (*update)(struct ahash_request *req);
int (*final)(struct ahash_request *req);
int (*finup)(struct ahash_request *req);
+ struct ahash_edesc *edesc;
+ void (*ahash_op_done)(struct device *jrdev, u32 *desc, u32 err,
+ void *context);
};

static inline void switch_buf(struct caam_hash_state *state)
@@ -604,6 +612,7 @@ static inline void ahash_done_cpy(struct device *jrdev, u32 *desc, u32 err,
{
struct caam_jr_request_entry *jrentry = context;
struct ahash_request *req = ahash_request_cast(jrentry->base);
+ struct caam_drv_private_jr *jrp = dev_get_drvdata(jrdev);
struct ahash_edesc *edesc;
struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
int digestsize = crypto_ahash_digestsize(ahash);
@@ -613,7 +622,8 @@ static inline void ahash_done_cpy(struct device *jrdev, u32 *desc, u32 err,

dev_dbg(jrdev, "%s %d: err 0x%x\n", __func__, __LINE__, err);

- edesc = container_of(desc, struct ahash_edesc, hw_desc[0]);
+ edesc = state->edesc;
+
if (err)
ecode = caam_jr_strstatus(jrdev, err);

@@ -625,7 +635,14 @@ static inline void ahash_done_cpy(struct device *jrdev, u32 *desc, u32 err,
DUMP_PREFIX_ADDRESS, 16, 4, state->caam_ctx,
ctx->ctx_len, 1);

- req->base.complete(&req->base, ecode);
+ /*
+ * If no backlog flag, the completion of the request is done
+ * by CAAM, not crypto engine.
+ */
+ if (!jrentry->bklog)
+ req->base.complete(&req->base, ecode);
+ else
+ crypto_finalize_hash_request(jrp->engine, req, ecode);
}

static void ahash_done(struct device *jrdev, u32 *desc, u32 err,
@@ -645,6 +662,7 @@ static inline void ahash_done_switch(struct device *jrdev, u32 *desc, u32 err,
{
struct caam_jr_request_entry *jrentry = context;
struct ahash_request *req = ahash_request_cast(jrentry->base);
+ struct caam_drv_private_jr *jrp = dev_get_drvdata(jrdev);
struct ahash_edesc *edesc;
struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
struct caam_hash_ctx *ctx = crypto_ahash_ctx(ahash);
@@ -654,7 +672,7 @@ static inline void ahash_done_switch(struct device *jrdev, u32 *desc, u32 err,

dev_dbg(jrdev, "%s %d: err 0x%x\n", __func__, __LINE__, err);

- edesc = container_of(desc, struct ahash_edesc, hw_desc[0]);
+ edesc = state->edesc;
if (err)
ecode = caam_jr_strstatus(jrdev, err);

@@ -670,7 +688,15 @@ static inline void ahash_done_switch(struct device *jrdev, u32 *desc, u32 err,
DUMP_PREFIX_ADDRESS, 16, 4, req->result,
digestsize, 1);

- req->base.complete(&req->base, ecode);
+ /*
+ * If no backlog flag, the completion of the request is done
+ * by CAAM, not crypto engine.
+ */
+ if (!jrentry->bklog)
+ req->base.complete(&req->base, ecode);
+ else
+ crypto_finalize_hash_request(jrp->engine, req, ecode);
+
}

static void ahash_done_bi(struct device *jrdev, u32 *desc, u32 err,
@@ -695,6 +721,7 @@ static struct ahash_edesc *ahash_edesc_alloc(struct ahash_request *req,
{
struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
struct caam_hash_ctx *ctx = crypto_ahash_ctx(ahash);
+ struct caam_hash_state *state = ahash_request_ctx(req);
gfp_t flags = (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ?
GFP_KERNEL : GFP_ATOMIC;
struct ahash_edesc *edesc;
@@ -707,6 +734,7 @@ static struct ahash_edesc *ahash_edesc_alloc(struct ahash_request *req,
}

edesc->jrentry.base = &req->base;
+ state->edesc = edesc;

init_job_desc_shared(edesc->hw_desc, sh_desc_dma, desc_len(sh_desc),
HDR_SHARE_DEFER | HDR_REVERSE);
@@ -750,6 +778,32 @@ static int ahash_edesc_add_src(struct caam_hash_ctx *ctx,
return 0;
}

+static int ahash_do_one_req(struct crypto_engine *engine, void *areq)
+{
+ struct ahash_request *req = ahash_request_cast(areq);
+ struct caam_hash_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req));
+ struct caam_hash_state *state = ahash_request_ctx(req);
+ struct caam_jr_request_entry *jrentry;
+ struct device *jrdev = ctx->jrdev;
+ u32 *desc = state->edesc->hw_desc;
+ int ret;
+
+ jrentry = &state->edesc->jrentry;
+ jrentry->bklog = true;
+
+ ret = caam_jr_enqueue_no_bklog(jrdev, desc, state->ahash_op_done,
+ jrentry);
+
+ if (ret != -EINPROGRESS) {
+ ahash_unmap(jrdev, state->edesc, req, 0);
+ kfree(state->edesc);
+ } else {
+ ret = 0;
+ }
+
+ return ret;
+}
+
/* submit update job descriptor */
static int ahash_update_ctx(struct ahash_request *req)
{
@@ -766,7 +820,6 @@ static int ahash_update_ctx(struct ahash_request *req)
u32 *desc;
int src_nents, mapped_nents, sec4_sg_bytes, sec4_sg_src_index;
struct ahash_edesc *edesc;
- struct caam_jr_request_entry *jrentry;
int ret = 0;

last_buflen = *next_buflen;
@@ -864,10 +917,11 @@ static int ahash_update_ctx(struct ahash_request *req)
DUMP_PREFIX_ADDRESS, 16, 4, desc,
desc_bytes(desc), 1);

- jrentry = &edesc->jrentry;
+ state->ahash_op_done = ahash_done_bi;

- ret = caam_jr_enqueue(jrdev, desc, ahash_done_bi, jrentry);
- if (ret != -EINPROGRESS)
+ ret = caam_jr_enqueue(jrdev, desc, ahash_done_bi,
+ &edesc->jrentry);
+ if ((ret != -EINPROGRESS) && (ret != -EBUSY))
goto unmap_ctx;
} else if (*next_buflen) {
scatterwalk_map_and_copy(buf + *buflen, req->src, 0,
@@ -900,7 +954,6 @@ static int ahash_final_ctx(struct ahash_request *req)
int sec4_sg_bytes;
int digestsize = crypto_ahash_digestsize(ahash);
struct ahash_edesc *edesc;
- struct caam_jr_request_entry *jrentry;
int ret;

sec4_sg_bytes = pad_sg_nents(1 + (buflen ? 1 : 0)) *
@@ -943,10 +996,11 @@ static int ahash_final_ctx(struct ahash_request *req)
DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc),
1);

- jrentry = &edesc->jrentry;
+ state->ahash_op_done = ahash_done_ctx_src;
+
+ ret = caam_jr_enqueue(jrdev, desc, ahash_done_ctx_src, &edesc->jrentry);

- ret = caam_jr_enqueue(jrdev, desc, ahash_done_ctx_src, jrentry);
- if (ret == -EINPROGRESS)
+ if ((ret == -EINPROGRESS) || (ret == -EBUSY))
return ret;

unmap_ctx:
@@ -967,7 +1021,6 @@ static int ahash_finup_ctx(struct ahash_request *req)
int src_nents, mapped_nents;
int digestsize = crypto_ahash_digestsize(ahash);
struct ahash_edesc *edesc;
- struct caam_jr_request_entry *jrentry;
int ret;

src_nents = sg_nents_for_len(req->src, req->nbytes);
@@ -1022,10 +1075,10 @@ static int ahash_finup_ctx(struct ahash_request *req)
DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc),
1);

- jrentry = &edesc->jrentry;
+ state->ahash_op_done = ahash_done_ctx_src;

- ret = caam_jr_enqueue(jrdev, desc, ahash_done_ctx_src, jrentry);
- if (ret == -EINPROGRESS)
+ ret = caam_jr_enqueue(jrdev, desc, ahash_done_ctx_src, &edesc->jrentry);
+ if ((ret == -EINPROGRESS) || (ret == -EBUSY))
return ret;

unmap_ctx:
@@ -1044,7 +1097,6 @@ static int ahash_digest(struct ahash_request *req)
int digestsize = crypto_ahash_digestsize(ahash);
int src_nents, mapped_nents;
struct ahash_edesc *edesc;
- struct caam_jr_request_entry *jrentry;
int ret;

state->buf_dma = 0;
@@ -1097,10 +1149,10 @@ static int ahash_digest(struct ahash_request *req)
DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc),
1);

- jrentry = &edesc->jrentry;
+ state->ahash_op_done = ahash_done;

- ret = caam_jr_enqueue(jrdev, desc, ahash_done, jrentry);
- if (ret != -EINPROGRESS) {
+ ret = caam_jr_enqueue(jrdev, desc, ahash_done, &edesc->jrentry);
+ if ((ret != -EINPROGRESS) && (ret != -EBUSY)) {
ahash_unmap_ctx(jrdev, edesc, req, digestsize, DMA_FROM_DEVICE);
kfree(edesc);
}
@@ -1120,7 +1172,6 @@ static int ahash_final_no_ctx(struct ahash_request *req)
u32 *desc;
int digestsize = crypto_ahash_digestsize(ahash);
struct ahash_edesc *edesc;
- struct caam_jr_request_entry *jrentry;
int ret;

/* allocate space for base edesc and hw desc commands, link tables */
@@ -1150,20 +1201,19 @@ static int ahash_final_no_ctx(struct ahash_request *req)
DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc),
1);

- jrentry = &edesc->jrentry;
+ state->ahash_op_done = ahash_done;

- ret = caam_jr_enqueue(jrdev, desc, ahash_done, jrentry);
- if (ret != -EINPROGRESS) {
+ ret = caam_jr_enqueue(jrdev, desc, ahash_done, &edesc->jrentry);
+ if ((ret != -EINPROGRESS) && (ret != -EBUSY)) {
ahash_unmap_ctx(jrdev, edesc, req, digestsize, DMA_FROM_DEVICE);
kfree(edesc);
}

return ret;
- unmap:
+unmap:
ahash_unmap(jrdev, edesc, req, digestsize);
kfree(edesc);
return -ENOMEM;
-
}

/* submit ahash update if it the first job descriptor after update */
@@ -1181,7 +1231,6 @@ static int ahash_update_no_ctx(struct ahash_request *req)
int in_len = *buflen + req->nbytes, to_hash;
int sec4_sg_bytes, src_nents, mapped_nents;
struct ahash_edesc *edesc;
- struct caam_jr_request_entry *jrentry;
u32 *desc;
int ret = 0;

@@ -1271,10 +1320,11 @@ static int ahash_update_no_ctx(struct ahash_request *req)
DUMP_PREFIX_ADDRESS, 16, 4, desc,
desc_bytes(desc), 1);

- jrentry = &edesc->jrentry;
+ state->ahash_op_done = ahash_done_ctx_dst;

- ret = caam_jr_enqueue(jrdev, desc, ahash_done_ctx_dst, jrentry);
- if (ret != -EINPROGRESS)
+ ret = caam_jr_enqueue(jrdev, desc, ahash_done_ctx_dst,
+ &edesc->jrentry);
+ if ((ret != -EINPROGRESS) && (ret != -EBUSY))
goto unmap_ctx;

state->update = ahash_update_ctx;
@@ -1294,7 +1344,7 @@ static int ahash_update_no_ctx(struct ahash_request *req)
1);

return ret;
- unmap_ctx:
+unmap_ctx:
ahash_unmap_ctx(jrdev, edesc, req, ctx->ctx_len, DMA_TO_DEVICE);
kfree(edesc);
return ret;
@@ -1312,7 +1362,6 @@ static int ahash_finup_no_ctx(struct ahash_request *req)
int sec4_sg_bytes, sec4_sg_src_index, src_nents, mapped_nents;
int digestsize = crypto_ahash_digestsize(ahash);
struct ahash_edesc *edesc;
- struct caam_jr_request_entry *jrentry;
int ret;

src_nents = sg_nents_for_len(req->src, req->nbytes);
@@ -1368,10 +1417,10 @@ static int ahash_finup_no_ctx(struct ahash_request *req)
DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc),
1);

- jrentry = &edesc->jrentry;
+ state->ahash_op_done = ahash_done;

- ret = caam_jr_enqueue(jrdev, desc, ahash_done, jrentry);
- if (ret != -EINPROGRESS) {
+ ret = caam_jr_enqueue(jrdev, desc, ahash_done, &edesc->jrentry);
+ if ((ret != -EINPROGRESS) && (ret != -EBUSY)) {
ahash_unmap_ctx(jrdev, edesc, req, digestsize, DMA_FROM_DEVICE);
kfree(edesc);
}
@@ -1398,7 +1447,6 @@ static int ahash_update_first(struct ahash_request *req)
u32 *desc;
int src_nents, mapped_nents;
struct ahash_edesc *edesc;
- struct caam_jr_request_entry *jrentry;
int ret = 0;

*next_buflen = req->nbytes & (blocksize - 1);
@@ -1468,10 +1516,11 @@ static int ahash_update_first(struct ahash_request *req)
DUMP_PREFIX_ADDRESS, 16, 4, desc,
desc_bytes(desc), 1);

- jrentry = &edesc->jrentry;
+ state->ahash_op_done = ahash_done_ctx_dst;

- ret = caam_jr_enqueue(jrdev, desc, ahash_done_ctx_dst, jrentry);
- if (ret != -EINPROGRESS)
+ ret = caam_jr_enqueue(jrdev, desc, ahash_done_ctx_dst,
+ &edesc->jrentry);
+ if ((ret != -EINPROGRESS) && (ret != -EBUSY))
goto unmap_ctx;

state->update = ahash_update_ctx;
@@ -1509,6 +1558,7 @@ static int ahash_init(struct ahash_request *req)
state->update = ahash_update_first;
state->finup = ahash_finup_first;
state->final = ahash_final_no_ctx;
+ state->ahash_op_done = ahash_done;

state->ctx_dma = 0;
state->ctx_dma_len = 0;
@@ -1562,6 +1612,8 @@ static int ahash_export(struct ahash_request *req, void *out)
export->update = state->update;
export->final = state->final;
export->finup = state->finup;
+ export->edesc = state->edesc;
+ export->ahash_op_done = state->ahash_op_done;

return 0;
}
@@ -1578,6 +1630,8 @@ static int ahash_import(struct ahash_request *req, const void *in)
state->update = export->update;
state->final = export->final;
state->finup = export->finup;
+ state->edesc = export->edesc;
+ state->ahash_op_done = export->ahash_op_done;

return 0;
}
@@ -1837,7 +1891,9 @@ static int caam_hash_cra_init(struct crypto_tfm *tfm)
}

dma_addr = dma_map_single_attrs(ctx->jrdev, ctx->sh_desc_update,
- offsetof(struct caam_hash_ctx, key),
+ offsetof(struct caam_hash_ctx, key) -
+ offsetof(struct caam_hash_ctx,
+ sh_desc_update),
ctx->dir, DMA_ATTR_SKIP_CPU_SYNC);
if (dma_mapping_error(ctx->jrdev, dma_addr)) {
dev_err(ctx->jrdev, "unable to map shared descriptors\n");
@@ -1855,11 +1911,19 @@ static int caam_hash_cra_init(struct crypto_tfm *tfm)
ctx->sh_desc_update_dma = dma_addr;
ctx->sh_desc_update_first_dma = dma_addr +
offsetof(struct caam_hash_ctx,
- sh_desc_update_first);
+ sh_desc_update_first) -
+ offsetof(struct caam_hash_ctx,
+ sh_desc_update);
ctx->sh_desc_fin_dma = dma_addr + offsetof(struct caam_hash_ctx,
- sh_desc_fin);
+ sh_desc_fin) -
+ offsetof(struct caam_hash_ctx,
+ sh_desc_update);
ctx->sh_desc_digest_dma = dma_addr + offsetof(struct caam_hash_ctx,
- sh_desc_digest);
+ sh_desc_digest) -
+ offsetof(struct caam_hash_ctx,
+ sh_desc_update);
+
+ ctx->enginectx.op.do_one_request = ahash_do_one_req;

crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
sizeof(struct caam_hash_state));
@@ -1876,7 +1940,8 @@ static void caam_hash_cra_exit(struct crypto_tfm *tfm)
struct caam_hash_ctx *ctx = crypto_tfm_ctx(tfm);

dma_unmap_single_attrs(ctx->jrdev, ctx->sh_desc_update_dma,
- offsetof(struct caam_hash_ctx, key),
+ offsetof(struct caam_hash_ctx, key) -
+ offsetof(struct caam_hash_ctx, sh_desc_update),
ctx->dir, DMA_ATTR_SKIP_CPU_SYNC);
if (ctx->key_dir != DMA_NONE)
dma_unmap_single_attrs(ctx->jrdev, ctx->adata.key_dma,
diff --git a/drivers/crypto/caam/jr.c b/drivers/crypto/caam/jr.c
index 579b1ba..5f7b797 100644
--- a/drivers/crypto/caam/jr.c
+++ b/drivers/crypto/caam/jr.c
@@ -440,6 +440,9 @@ static int transfer_request_to_engine(struct crypto_engine *engine,
case CRYPTO_ALG_TYPE_AKCIPHER:
return crypto_transfer_akcipher_request_to_engine(engine,
akcipher_request_cast(req));
+ case CRYPTO_ALG_TYPE_AHASH:
+ return crypto_transfer_hash_request_to_engine(engine,
+ ahash_request_cast(req));
default:
return -EINVAL;
}
--
2.1.0

Next message: Iuliana Prodan: "[PATCH 10/12] crypto: caam - add crypto_engine support for AEAD algorithms"
Previous message: Iuliana Prodan: "[PATCH 08/12] crypto: caam - support crypto_engine framework for SKCIPHER algorithms"
In reply to: Herbert Xu: "Re: [PATCH 08/12] crypto: caam - support crypto_engine framework for SKCIPHER algorithms"
Next in thread: Horia Geanta: "Re: [PATCH 12/12] crypto: caam - add crypto_engine support for HASH algorithms"
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