[dpdk-dev] [PATCH 1/2] net/sfc/base: add MCDI agnostic wrapper for MAC stats clear

[Andrew Rybchenko]

From: Ivan Malov <ivan.malov at oktetlabs.ru>

If a libefx-based driver needs some way to clear port statistics,
then an MCDI agnostic method is required.

Signed-off-by: Ivan Malov <ivan.malov at oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko at solarflare.com>
---
 drivers/net/sfc/base/efx.h      |  4 ++++
 drivers/net/sfc/base/efx_impl.h |  1 +
 drivers/net/sfc/base/efx_mac.c  | 25 +++++++++++++++++++++++++
 3 files changed, 30 insertions(+)

diff --git a/drivers/net/sfc/base/efx.h b/drivers/net/sfc/base/efx.h
index 0815d7a..1d1c8bd 100644
--- a/drivers/net/sfc/base/efx.h
+++ b/drivers/net/sfc/base/efx.h
@@ -559,6 +559,10 @@ enum {
 
 #define	EFX_MAC_STATS_SIZE 0x400
 
+extern	__checkReturn			efx_rc_t
+efx_mac_stats_clear(
+	__in				efx_nic_t *enp);
+
 /*
  * Upload mac statistics supported by the hardware into the given buffer.
  *
diff --git a/drivers/net/sfc/base/efx_impl.h b/drivers/net/sfc/base/efx_impl.h
index 3a520a8..a38dad4 100644
--- a/drivers/net/sfc/base/efx_impl.h
+++ b/drivers/net/sfc/base/efx_impl.h
@@ -198,6 +198,7 @@
 #endif	/* EFSYS_OPT_LOOPBACK */
 #if EFSYS_OPT_MAC_STATS
 	efx_rc_t	(*emo_stats_get_mask)(efx_nic_t *, uint32_t *, size_t);
+	efx_rc_t	(*emo_stats_clear)(efx_nic_t *);
 	efx_rc_t	(*emo_stats_upload)(efx_nic_t *, efsys_mem_t *);
 	efx_rc_t	(*emo_stats_periodic)(efx_nic_t *, efsys_mem_t *,
 					      uint16_t, boolean_t);
diff --git a/drivers/net/sfc/base/efx_mac.c b/drivers/net/sfc/base/efx_mac.c
index c1d81ef..752e720 100644
--- a/drivers/net/sfc/base/efx_mac.c
+++ b/drivers/net/sfc/base/efx_mac.c
@@ -55,6 +55,7 @@
 #endif	/* EFSYS_OPT_LOOPBACK */
 #if EFSYS_OPT_MAC_STATS
 	siena_mac_stats_get_mask,		/* emo_stats_get_mask */
+	efx_mcdi_mac_stats_clear,		/* emo_stats_clear */
 	efx_mcdi_mac_stats_upload,		/* emo_stats_upload */
 	efx_mcdi_mac_stats_periodic,		/* emo_stats_periodic */
 	siena_mac_stats_update			/* emo_stats_update */
@@ -79,6 +80,7 @@
 #endif	/* EFSYS_OPT_LOOPBACK */
 #if EFSYS_OPT_MAC_STATS
 	ef10_mac_stats_get_mask,		/* emo_stats_get_mask */
+	efx_mcdi_mac_stats_clear,		/* emo_stats_clear */
 	efx_mcdi_mac_stats_upload,		/* emo_stats_upload */
 	efx_mcdi_mac_stats_periodic,		/* emo_stats_periodic */
 	ef10_mac_stats_update			/* emo_stats_update */
@@ -714,6 +716,29 @@
 }
 
 	__checkReturn			efx_rc_t
+efx_mac_stats_clear(
+	__in				efx_nic_t *enp)
+{
+	efx_port_t *epp = &(enp->en_port);
+	const efx_mac_ops_t *emop = epp->ep_emop;
+	efx_rc_t rc;
+
+	EFSYS_ASSERT3U(enp->en_magic, ==, EFX_NIC_MAGIC);
+	EFSYS_ASSERT3U(enp->en_mod_flags, &, EFX_MOD_PORT);
+	EFSYS_ASSERT(emop != NULL);
+
+	if ((rc = emop->emo_stats_clear(enp)) != 0)
+		goto fail1;
+
+	return (0);
+
+fail1:
+	EFSYS_PROBE1(fail1, efx_rc_t, rc);
+
+	return (rc);
+}
+
+	__checkReturn			efx_rc_t
 efx_mac_stats_upload(
 	__in				efx_nic_t *enp,
 	__in				efsys_mem_t *esmp)
-- 
1.8.2.3