[PATCH v3 02/13] crypto: iaa - Add an acomp_req flag CRYPTO_ACOMP_REQ_POLL to enable async mode.

Kanchana P Sridhar
2024-11-06T19:21:09Z

If the iaa_crypto driver has async_mode set to true, and use_irq set to
false, it can still be forced to use synchronous mode by turning off the
CRYPTO_ACOMP_REQ_POLL flag in req->flags.

All three of the following need to be true for a request to be processed in
fully async poll mode:

1) async_mode should be "true"
2) use_irq should be "false"
3) req->flags & CRYPTO_ACOMP_REQ_POLL should be "true"

Suggested-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Kanchana P Sridhar <kanchana.p.sridhar@intel.com>
---
drivers/crypto/intel/iaa/iaa_crypto_main.c | 11 ++++++++++-
include/crypto/acompress.h | 5 +++++
2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/crypto/intel/iaa/iaa_crypto_main.c b/drivers/crypto/intel/iaa/iaa_crypto_main.c
index 237f87000070..2edaecd42cc6 100644
--- a/drivers/crypto/intel/iaa/iaa_crypto_main.c
+++ b/drivers/crypto/intel/iaa/iaa_crypto_main.c
@@ -1510,6 +1510,10 @@ static int iaa_comp_acompress(struct acomp_req *req)
return -EINVAL;
}

+ /* If the caller has requested no polling, disable async. */
+ if (!(req->flags & CRYPTO_ACOMP_REQ_POLL))
+ disable_async = true;
+
cpu = get_cpu();
wq = wq_table_next_wq(cpu);
put_cpu();
@@ -1702,6 +1706,7 @@ static int iaa_comp_adecompress(struct acomp_req *req)
{
struct crypto_tfm *tfm = req->base.tfm;
dma_addr_t src_addr, dst_addr;
+ bool disable_async = false;
int nr_sgs, cpu, ret = 0;
struct iaa_wq *iaa_wq;
struct device *dev;
@@ -1717,6 +1722,10 @@ static int iaa_comp_adecompress(struct acomp_req *req)
return -EINVAL;
}

+ /* If the caller has requested no polling, disable async. */
+ if (!(req->flags & CRYPTO_ACOMP_REQ_POLL))
+ disable_async = true;
+
if (!req->dst)
return iaa_comp_adecompress_alloc_dest(req);

@@ -1765,7 +1774,7 @@ static int iaa_comp_adecompress(struct acomp_req *req)
req->dst, req->dlen, sg_dma_len(req->dst));

ret = iaa_decompress(tfm, req, wq, src_addr, req->slen,
- dst_addr, &req->dlen, false);
+ dst_addr, &req->dlen, disable_async);
if (ret == -EINPROGRESS)
return ret;

diff --git a/include/crypto/acompress.h b/include/crypto/acompress.h
index ab0d9987bde1..5973f5f67954 100644
--- a/include/crypto/acompress.h
+++ b/include/crypto/acompress.h
@@ -14,6 +14,11 @@
#include <linux/crypto.h>

#define CRYPTO_ACOMP_ALLOC_OUTPUT 0x00000001
+/*
+ * If set, the driver must have a way to submit the req, then
+ * poll its completion status for success/error.
+ */
+#define CRYPTO_ACOMP_REQ_POLL 0x00000002
#define CRYPTO_ACOMP_DST_MAX 131072

/**
--
2.27.0