[PATCH v6 17/17] crypto/nx: Register and unregister VAS interface on PowerVM

[Haren Myneni]

The user space uses /dev/crypto/nx-gzip interface to setup VAS
windows, create paste mapping and close windows. This patch adds
changes to create/remove this interface with VAS register/unregister
functions on PowerVM platform.

Signed-off-by: Haren Myneni <ha...@linux.ibm.com>
Acked-by: Herbert Xu <herb...@gondor.apana.org.au>
Acked-by: Nicholas Piggin <npig...@gmail.com>
---
 drivers/crypto/nx/Kconfig             | 1 +
 drivers/crypto/nx/nx-common-pseries.c | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/drivers/crypto/nx/Kconfig b/drivers/crypto/nx/Kconfig
index 23e3d0160e67..2a35e0e785bd 100644
--- a/drivers/crypto/nx/Kconfig
+++ b/drivers/crypto/nx/Kconfig
@@ -29,6 +29,7 @@ if CRYPTO_DEV_NX_COMPRESS
 config CRYPTO_DEV_NX_COMPRESS_PSERIES
        tristate "Compression acceleration support on pSeries platform"
        depends on PPC_PSERIES && IBMVIO
+       depends on PPC_VAS
        default y
        help
          Support for PowerPC Nest (NX) compression acceleration. This
diff --git a/drivers/crypto/nx/nx-common-pseries.c 
b/drivers/crypto/nx/nx-common-pseries.c
index f51a50d40504..6671f6634dda 100644
--- a/drivers/crypto/nx/nx-common-pseries.c
+++ b/drivers/crypto/nx/nx-common-pseries.c
@@ -1231,6 +1231,12 @@ static int __init nx842_pseries_init(void)
                return ret;
        }
 
+       ret = vas_register_api_pseries(THIS_MODULE, VAS_COP_TYPE_GZIP,
+                                      "nx-gzip");
+
+       if (ret)
+               pr_err("NX-GZIP is not supported. Returned=%d\n", ret);
+
        return 0;
 }
 
@@ -1241,6 +1247,8 @@ static void __exit nx842_pseries_exit(void)
        struct nx842_devdata *old_devdata;
        unsigned long flags;
 
+       vas_unregister_api_pseries();
+
        crypto_unregister_alg(&nx842_pseries_alg);
 
        spin_lock_irqsave(&devdata_mutex, flags);
-- 
2.18.2