netdev - [PATCH net-next 15/15] sfc_ef100: helper function to set default RSS table of given size

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Message-ID: <be8ae63e-4822-8983-9df9-10057c62aa23@solarflare.com>
Date:   Wed, 1 Jul 2020 15:56:08 +0100
From:   Edward Cree <ecree@...arflare.com>
To:     <linux-net-drivers@...arflare.com>, <davem@...emloft.net>
CC:     <netdev@...r.kernel.org>
Subject: [PATCH net-next 15/15] sfc_ef100: helper function to set default RSS
 table of given size

Signed-off-by: Edward Cree <ecree@...arflare.com>
---
 drivers/net/ethernet/sfc/mcdi_filters.c | 21 +++++++++++++++++++++
 drivers/net/ethernet/sfc/mcdi_filters.h |  2 ++
 2 files changed, 23 insertions(+)

diff --git a/drivers/net/ethernet/sfc/mcdi_filters.c b/drivers/net/ethernet/sfc/mcdi_filters.c
index 283f68264b66..5a74d880b733 100644
--- a/drivers/net/ethernet/sfc/mcdi_filters.c
+++ b/drivers/net/ethernet/sfc/mcdi_filters.c
@@ -2276,3 +2276,24 @@ int efx_mcdi_vf_rx_push_rss_config(struct efx_nic *efx, bool user,
 		return 0;
 	return efx_mcdi_filter_rx_push_shared_rss_config(efx, NULL);
 }
+
+int efx_mcdi_push_default_indir_table(struct efx_nic *efx,
+				      unsigned int rss_spread)
+{
+	int rc = 0;
+
+	if (efx->rss_spread == rss_spread)
+		return 0;
+
+	efx->rss_spread = rss_spread;
+	if (!efx->filter_state)
+		return 0;
+
+	efx_mcdi_rx_free_indir_table(efx);
+	if (rss_spread > 1) {
+		efx_set_default_rx_indir_table(efx, &efx->rss_context);
+		rc = efx->type->rx_push_rss_config(efx, false,
+				   efx->rss_context.rx_indir_table, NULL);
+	}
+	return rc;
+}
diff --git a/drivers/net/ethernet/sfc/mcdi_filters.h b/drivers/net/ethernet/sfc/mcdi_filters.h
index 23f9d08d071d..06426aa9f2f3 100644
--- a/drivers/net/ethernet/sfc/mcdi_filters.h
+++ b/drivers/net/ethernet/sfc/mcdi_filters.h
@@ -155,6 +155,8 @@ int efx_mcdi_vf_rx_push_rss_config(struct efx_nic *efx, bool user,
 				   __attribute__ ((unused)),
 				   const u8 *key
 				   __attribute__ ((unused)));
+int efx_mcdi_push_default_indir_table(struct efx_nic *efx,
+				      unsigned int rss_spread);
 int efx_mcdi_rx_pull_rss_config(struct efx_nic *efx);
 int efx_mcdi_rx_pull_rss_context_config(struct efx_nic *efx,
 					struct efx_rss_context *ctx);