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Message-ID: <20250619122316.2587236-5-ovidiu.panait.oss@gmail.com>
Date: Thu, 19 Jun 2025 15:23:10 +0300
From: Ovidiu Panait <ovidiu.panait.oss@...il.com>
To: clabbe.montjoie@...il.com,
herbert@...dor.apana.org.au,
davem@...emloft.net,
linux-crypto@...r.kernel.org
Cc: wens@...e.org,
jernej.skrabec@...il.com,
samuel@...lland.org,
linux-arm-kernel@...ts.infradead.org,
linux-sunxi@...ts.linux.dev,
linux-kernel@...r.kernel.org,
Ovidiu Panait <ovidiu.panait.oss@...il.com>
Subject: [PATCH 04/10] crypto: sun8i-ce - save hash buffers and dma info to request context
Currently, all hash processing (buffer allocation/deallocation, dma
mapping/unmapping) is done inside do_one_request() callback.
In order to implement request batching, the hash buffers and dma info
associated with each request need to be saved inside request context, for
later use (during do_batch_requests() callback).
Signed-off-by: Ovidiu Panait <ovidiu.panait.oss@...il.com>
---
.../crypto/allwinner/sun8i-ce/sun8i-ce-hash.c | 56 +++++++------------
drivers/crypto/allwinner/sun8i-ce/sun8i-ce.h | 17 ++++++
2 files changed, 38 insertions(+), 35 deletions(-)
diff --git a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-hash.c b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-hash.c
index 61e8d968fdcc..3ee0c65ef600 100644
--- a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-hash.c
+++ b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-hash.c
@@ -328,12 +328,9 @@ int sun8i_ce_hash_run(struct crypto_engine *engine, void *breq)
u32 common;
u64 byte_count;
__le32 *bf;
- void *buf, *result;
int j, i, todo;
u64 bs;
int digestsize;
- dma_addr_t addr_res, addr_pad;
- int ns = sg_nents_for_len(areq->src, areq->nbytes);
algt = container_of(alg, struct sun8i_ce_alg_template, alg.hash.base);
ce = algt->ce;
@@ -345,19 +342,7 @@ int sun8i_ce_hash_run(struct crypto_engine *engine, void *breq)
if (digestsize == SHA384_DIGEST_SIZE)
digestsize = SHA512_DIGEST_SIZE;
- /* the padding could be up to two block. */
- buf = kcalloc(2, bs, GFP_KERNEL | GFP_DMA);
- if (!buf) {
- err = -ENOMEM;
- goto err_out;
- }
- bf = (__le32 *)buf;
-
- result = kzalloc(digestsize, GFP_KERNEL | GFP_DMA);
- if (!result) {
- err = -ENOMEM;
- goto err_free_buf;
- }
+ bf = (__le32 *)rctx->pad;
flow = rctx->flow;
chan = &ce->chanlist[flow];
@@ -378,11 +363,12 @@ int sun8i_ce_hash_run(struct crypto_engine *engine, void *breq)
cet->t_sym_ctl = 0;
cet->t_asym_ctl = 0;
- nr_sgs = dma_map_sg(ce->dev, areq->src, ns, DMA_TO_DEVICE);
+ rctx->nr_sgs = sg_nents_for_len(areq->src, areq->nbytes);
+ nr_sgs = dma_map_sg(ce->dev, areq->src, rctx->nr_sgs, DMA_TO_DEVICE);
if (nr_sgs <= 0 || nr_sgs > MAX_SG) {
dev_err(ce->dev, "Invalid sg number %d\n", nr_sgs);
err = -EINVAL;
- goto err_free_result;
+ goto err_out;
}
len = areq->nbytes;
@@ -397,10 +383,13 @@ int sun8i_ce_hash_run(struct crypto_engine *engine, void *breq)
err = -EINVAL;
goto err_unmap_src;
}
- addr_res = dma_map_single(ce->dev, result, digestsize, DMA_FROM_DEVICE);
- cet->t_dst[0].addr = desc_addr_val_le32(ce, addr_res);
- cet->t_dst[0].len = cpu_to_le32(digestsize / 4);
- if (dma_mapping_error(ce->dev, addr_res)) {
+
+ rctx->result_len = digestsize;
+ rctx->addr_res = dma_map_single(ce->dev, rctx->result, rctx->result_len,
+ DMA_FROM_DEVICE);
+ cet->t_dst[0].addr = desc_addr_val_le32(ce, rctx->addr_res);
+ cet->t_dst[0].len = cpu_to_le32(rctx->result_len / 4);
+ if (dma_mapping_error(ce->dev, rctx->addr_res)) {
dev_err(ce->dev, "DMA map dest\n");
err = -EINVAL;
goto err_unmap_src;
@@ -428,10 +417,12 @@ int sun8i_ce_hash_run(struct crypto_engine *engine, void *breq)
goto err_unmap_result;
}
- addr_pad = dma_map_single(ce->dev, buf, j * 4, DMA_TO_DEVICE);
- cet->t_src[i].addr = desc_addr_val_le32(ce, addr_pad);
+ rctx->pad_len = j * 4;
+ rctx->addr_pad = dma_map_single(ce->dev, rctx->pad, rctx->pad_len,
+ DMA_TO_DEVICE);
+ cet->t_src[i].addr = desc_addr_val_le32(ce, rctx->addr_pad);
cet->t_src[i].len = cpu_to_le32(j);
- if (dma_mapping_error(ce->dev, addr_pad)) {
+ if (dma_mapping_error(ce->dev, rctx->addr_pad)) {
dev_err(ce->dev, "DMA error on padding SG\n");
err = -EINVAL;
goto err_unmap_result;
@@ -444,21 +435,16 @@ int sun8i_ce_hash_run(struct crypto_engine *engine, void *breq)
err = sun8i_ce_run_task(ce, flow, crypto_ahash_alg_name(tfm));
- dma_unmap_single(ce->dev, addr_pad, j * 4, DMA_TO_DEVICE);
+ dma_unmap_single(ce->dev, rctx->addr_pad, rctx->pad_len, DMA_TO_DEVICE);
err_unmap_result:
- dma_unmap_single(ce->dev, addr_res, digestsize, DMA_FROM_DEVICE);
+ dma_unmap_single(ce->dev, rctx->addr_res, rctx->result_len,
+ DMA_FROM_DEVICE);
if (!err)
- memcpy(areq->result, result, crypto_ahash_digestsize(tfm));
+ memcpy(areq->result, rctx->result, crypto_ahash_digestsize(tfm));
err_unmap_src:
- dma_unmap_sg(ce->dev, areq->src, ns, DMA_TO_DEVICE);
-
-err_free_result:
- kfree(result);
-
-err_free_buf:
- kfree(buf);
+ dma_unmap_sg(ce->dev, areq->src, rctx->nr_sgs, DMA_TO_DEVICE);
err_out:
local_bh_disable();
diff --git a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce.h b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce.h
index 0d46531c475c..90b955787d37 100644
--- a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce.h
+++ b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce.h
@@ -110,6 +110,9 @@
#define MAXFLOW 4
+#define CE_MAX_HASH_DIGEST_SIZE SHA512_DIGEST_SIZE
+#define CE_MAX_HASH_BLOCK_SIZE SHA512_BLOCK_SIZE
+
/*
* struct ce_clock - Describe clocks used by sun8i-ce
* @name: Name of clock needed by this variant
@@ -304,9 +307,23 @@ struct sun8i_ce_hash_tfm_ctx {
* struct sun8i_ce_hash_reqctx - context for an ahash request
* @fallback_req: pre-allocated fallback request
* @flow: the flow to use for this request
+ * @nr_sgs: number of entries in the source scatterlist
+ * @result_len: result length in bytes
+ * @pad_len: padding length in bytes
+ * @addr_res: DMA address of the result buffer, returned by dma_map_single()
+ * @addr_pad: DMA address of the padding buffer, returned by dma_map_single()
+ * @result: per-request result buffer
+ * @pad: per-request padding buffer (up to 2 blocks)
*/
struct sun8i_ce_hash_reqctx {
int flow;
+ int nr_sgs;
+ size_t result_len;
+ size_t pad_len;
+ dma_addr_t addr_res;
+ dma_addr_t addr_pad;
+ u8 result[CE_MAX_HASH_DIGEST_SIZE] ____cacheline_aligned;
+ u8 pad[2 * CE_MAX_HASH_BLOCK_SIZE] ____cacheline_aligned;
struct ahash_request fallback_req; // keep at the end
};
--
2.49.0
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