linux-kernel - [PATCH v4 04/10] crypto: iaa - Make async mode the default.

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Message-Id: <20241123070127.332773-5-kanchana.p.sridhar@intel.com>
Date: Fri, 22 Nov 2024 23:01:21 -0800
From: Kanchana P Sridhar <kanchana.p.sridhar@...el.com>
To: linux-kernel@...r.kernel.org,
	linux-mm@...ck.org,
	hannes@...xchg.org,
	yosryahmed@...gle.com,
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	ryan.roberts@....com,
	ying.huang@...el.com,
	21cnbao@...il.com,
	akpm@...ux-foundation.org,
	linux-crypto@...r.kernel.org,
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	kristen.c.accardi@...el.com
Cc: wajdi.k.feghali@...el.com,
	vinodh.gopal@...el.com,
	kanchana.p.sridhar@...el.com
Subject: [PATCH v4 04/10] crypto: iaa - Make async mode the default.

This patch makes it easier for IAA hardware acceleration in the iaa_crypto
driver to be loaded by default in the most efficient/recommended "async"
mode for parallel compressions/decompressions, namely, asynchronous
submission of descriptors, followed by polling for job completions.
Earlier, the "sync" mode used to be the default.

This way, anyone that wants to use IAA can do so after building the kernel,
and without having to go through these steps to use async poll:

  1) disable all the IAA device/wq bindings that happen at boot time
  2) rmmod iaa_crypto
  3) modprobe iaa_crypto
  4) echo async > /sys/bus/dsa/drivers/crypto/sync_mode
  5) re-run initialization of the IAA devices and wqs

Signed-off-by: Kanchana P Sridhar <kanchana.p.sridhar@...el.com>
---
 drivers/crypto/intel/iaa/iaa_crypto_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/crypto/intel/iaa/iaa_crypto_main.c b/drivers/crypto/intel/iaa/iaa_crypto_main.c
index cbf147a3c3cb..bd2db0b6f145 100644
--- a/drivers/crypto/intel/iaa/iaa_crypto_main.c
+++ b/drivers/crypto/intel/iaa/iaa_crypto_main.c
@@ -153,7 +153,7 @@ static DRIVER_ATTR_RW(verify_compress);
  */
 
 /* Use async mode */
-static bool async_mode;
+static bool async_mode = true;
 /* Use interrupts */
 static bool use_irq;
 
-- 
2.27.0