The Fixed ("deflate-iaa") and Dynamic ("deflate-iaa-dynamic") IAA
acomp_algs register an implementation for get_batch_size(). zswap can
query crypto_acomp_batch_size() to get the maximum number of requests
that can be batch [de]compressed. zswap can use the minimum of this, and
any zswap-specific upper limits for batch-size to allocate batching
resources.

This enables zswap to compress/decompress pages in parallel in the IAA
hardware accelerator to improve swapout/swapin performance and memory
savings.

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

diff --git a/drivers/crypto/intel/iaa/iaa_crypto_main.c b/drivers/crypto/intel/iaa/iaa_crypto_main.c
index 30782478b18e2..b4b1c3e0fbfd9 100644
--- a/drivers/crypto/intel/iaa/iaa_crypto_main.c
+++ b/drivers/crypto/intel/iaa/iaa_crypto_main.c
@@ -2781,6 +2781,7 @@ static struct acomp_alg iaa_acomp_fixed_deflate = {
 	.init			= iaa_comp_init_fixed,
 	.compress		= iaa_comp_acompress_main,
 	.decompress		= iaa_comp_adecompress_main,
+	.get_batch_size		= iaa_comp_get_max_batch_size,
 	.base			= {
 		.cra_name		= "deflate",
 		.cra_driver_name	= "deflate-iaa",
@@ -2806,6 +2807,7 @@ static struct acomp_alg iaa_acomp_dynamic_deflate = {
 	.init			= iaa_comp_init_dynamic,
 	.compress		= iaa_comp_acompress_main,
 	.decompress		= iaa_comp_adecompress_main,
+	.get_batch_size		= iaa_comp_get_max_batch_size,
 	.base			= {
 		.cra_name		= "deflate",
 		.cra_driver_name	= "deflate-iaa-dynamic",
-- 
2.27.0