Commit 6f879791 authored Dec 16, 2021 by Marco Chiappero Committed by Herbert Xu Dec 24, 2021

crypto: qat - improve the ACK timings in PFVF send



Review the ACK timings in adf_gen2_pfvf_send() to improve the latency
by reducing the polling interval. Also increase the timeout, for higher
tolerance in highly loaded systems, and reposition these new values to
allow for inclusion by the future GEN4 devices too.

Signed-off-by: Marco Chiappero <marco.chiappero@intel.com>
Co-developed-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Reviewed-by: Fiona Trahe <fiona.trahe@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

parent 1c94d803

drivers/crypto/qat/qat_common/adf_gen2_pfvf.c

+0 −3

Original line number	Diff line number	Diff line
		@@ -37,9 +37,6 @@ static const struct pfvf_csr_format csr_gen2_fmt = {
		{ ADF_PFVF_GEN2_MSGDATA_SHIFT, ADF_PFVF_GEN2_MSGDATA_MASK },
		};

		#define ADF_PFVF_MSG_ACK_DELAY_US 2000
		#define ADF_PFVF_MSG_ACK_MAX_DELAY_US (ADF_PFVF_MSG_ACK_DELAY_US * 100)

		#define ADF_PFVF_MSG_RETRY_DELAY 5
		#define ADF_PFVF_MSG_MAX_RETRIES 3

drivers/crypto/qat/qat_common/adf_pfvf_utils.h

+4 −0

Original line number	Diff line number	Diff line
		@@ -6,6 +6,10 @@
		#include <linux/types.h>
		#include "adf_pfvf_msg.h"

		/* How long to wait for far side to acknowledge receipt */
		#define ADF_PFVF_MSG_ACK_DELAY_US 4
		#define ADF_PFVF_MSG_ACK_MAX_DELAY_US (1 * USEC_PER_SEC)

		struct pfvf_field_format {
		u8 offset;
		u32 mask;