amd-xgbe: Provide support for receive side scaling
This patch provides support for receive side scaling (RSS). RSS allows
for spreading incoming network packets across the Rx queues. When used
in conjunction with the per DMA channel interrupt support, this allows
the receive processing to be spread across multiple processors.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-common.h b/drivers/net/ethernet/amd/xgbe/xgbe-common.h
index 39bcb11..2fe8fc7 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-common.h
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-common.h
@@ -308,6 +308,9 @@
#define MAC_MACA0LR 0x0304
#define MAC_MACA1HR 0x0308
#define MAC_MACA1LR 0x030c
+#define MAC_RSSCR 0x0c80
+#define MAC_RSSAR 0x0c88
+#define MAC_RSSDR 0x0c8c
#define MAC_TSCR 0x0d00
#define MAC_SSIR 0x0d04
#define MAC_STSR 0x0d08
@@ -449,6 +452,24 @@
#define MAC_RFCR_UP_WIDTH 1
#define MAC_RQC0R_RXQ0EN_INDEX 0
#define MAC_RQC0R_RXQ0EN_WIDTH 2
+#define MAC_RSSAR_ADDRT_INDEX 2
+#define MAC_RSSAR_ADDRT_WIDTH 1
+#define MAC_RSSAR_CT_INDEX 1
+#define MAC_RSSAR_CT_WIDTH 1
+#define MAC_RSSAR_OB_INDEX 0
+#define MAC_RSSAR_OB_WIDTH 1
+#define MAC_RSSAR_RSSIA_INDEX 8
+#define MAC_RSSAR_RSSIA_WIDTH 8
+#define MAC_RSSCR_IP2TE_INDEX 1
+#define MAC_RSSCR_IP2TE_WIDTH 1
+#define MAC_RSSCR_RSSE_INDEX 0
+#define MAC_RSSCR_RSSE_WIDTH 1
+#define MAC_RSSCR_TCP4TE_INDEX 2
+#define MAC_RSSCR_TCP4TE_WIDTH 1
+#define MAC_RSSCR_UDP4TE_INDEX 3
+#define MAC_RSSCR_UDP4TE_WIDTH 1
+#define MAC_RSSDR_DMCH_INDEX 0
+#define MAC_RSSDR_DMCH_WIDTH 4
#define MAC_SSIR_SNSINC_INDEX 8
#define MAC_SSIR_SNSINC_WIDTH 8
#define MAC_SSIR_SSINC_INDEX 16
@@ -848,6 +869,8 @@
#define RX_PACKET_ATTRIBUTES_CONTEXT_WIDTH 1
#define RX_PACKET_ATTRIBUTES_RX_TSTAMP_INDEX 5
#define RX_PACKET_ATTRIBUTES_RX_TSTAMP_WIDTH 1
+#define RX_PACKET_ATTRIBUTES_RSS_HASH_INDEX 6
+#define RX_PACKET_ATTRIBUTES_RSS_HASH_WIDTH 1
#define RX_NORMAL_DESC0_OVT_INDEX 0
#define RX_NORMAL_DESC0_OVT_WIDTH 16
@@ -865,12 +888,23 @@
#define RX_NORMAL_DESC3_FD_WIDTH 1
#define RX_NORMAL_DESC3_INTE_INDEX 30
#define RX_NORMAL_DESC3_INTE_WIDTH 1
+#define RX_NORMAL_DESC3_L34T_INDEX 20
+#define RX_NORMAL_DESC3_L34T_WIDTH 4
#define RX_NORMAL_DESC3_LD_INDEX 28
#define RX_NORMAL_DESC3_LD_WIDTH 1
#define RX_NORMAL_DESC3_OWN_INDEX 31
#define RX_NORMAL_DESC3_OWN_WIDTH 1
#define RX_NORMAL_DESC3_PL_INDEX 0
#define RX_NORMAL_DESC3_PL_WIDTH 14
+#define RX_NORMAL_DESC3_RSV_INDEX 26
+#define RX_NORMAL_DESC3_RSV_WIDTH 1
+
+#define RX_DESC3_L34T_IPV4_TCP 1
+#define RX_DESC3_L34T_IPV4_UDP 2
+#define RX_DESC3_L34T_IPV4_ICMP 3
+#define RX_DESC3_L34T_IPV6_TCP 9
+#define RX_DESC3_L34T_IPV6_UDP 10
+#define RX_DESC3_L34T_IPV6_ICMP 11
#define RX_CONTEXT_DESC3_TSA_INDEX 4
#define RX_CONTEXT_DESC3_TSA_WIDTH 1