netdev - [PATCH net-next v2 4/4] cxgb4: enable RSS for FCoE frames

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Date:	Mon, 13 Apr 2015 19:34:26 +0530
From:	Varun Prakash <varun@...lsio.com>
To:	netdev@...r.kernel.org, linux-scsi@...r.kernel.org,
	linux-rdma@...r.kernel.org
Cc:	davem@...emloft.net, JBottomley@...allels.com,
	roland@...estorage.com, leedom@...lsio.com, anish@...lsio.com,
	hariprasad@...lsio.com, swise@...ngridcomputing.com,
	kxie@...lsio.com, praveenm@...lsio.com, kumaras@...lsio.com,
	varun@...lsio.com
Subject: [PATCH net-next v2 4/4] cxgb4: enable RSS for FCoE frames

Signed-off-by: Varun Prakash <varun@...lsio.com>
---
 drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c |    8 ++++++++
 drivers/net/ethernet/chelsio/cxgb4/t4_regs.h    |    8 ++++++++
 2 files changed, 16 insertions(+), 0 deletions(-)

diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
index 95e7527..606aa5a 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
@@ -910,6 +910,9 @@ int cxgb4_write_rss(const struct port_info *pi, const u16 *queues)
 static int setup_rss(struct adapter *adap)
 {
 	int i, err;
+#ifdef CONFIG_CHELSIO_T4_FCOE
+	u32 rss_config;
+#endif
 
 	for_each_port(adap, i) {
 		const struct port_info *pi = adap2pinfo(adap, i);
@@ -918,6 +921,11 @@ static int setup_rss(struct adapter *adap)
 		if (err)
 			return err;
 	}
+#ifdef CONFIG_CHELSIO_T4_FCOE
+	rss_config = t4_read_reg(adap, TP_RSS_CONFIG_A);
+	rss_config |= TNLFCOEEN_F | TNLFCOEMODE_F;
+	t4_write_reg(adap, TP_RSS_CONFIG_A, rss_config);
+#endif
 	return 0;
 }
 
diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4_regs.h b/drivers/net/ethernet/chelsio/cxgb4/t4_regs.h
index 326674b..3e10c99 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/t4_regs.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4_regs.h
@@ -1856,6 +1856,14 @@
 #define DISABLE_V(x) ((x) << DISABLE_S)
 #define DISABLE_F    DISABLE_V(1U)
 
+#define TNLFCOEMODE_S    23
+#define TNLFCOEMODE_V(x) ((x) << TNLFCOEMODE_S)
+#define TNLFCOEMODE_F    TNLFCOEMODE_V(1U)
+
+#define TNLFCOEEN_S    21
+#define TNLFCOEEN_V(x) ((x) << TNLFCOEEN_S)
+#define TNLFCOEEN_F    TNLFCOEEN_V(1U)
+
 #define TP_RSS_CONFIG_TNL_A 0x7df4
 
 #define MASKSIZE_S    28
-- 
1.7.1

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