[dpdk-dev] [PATCH 1/5] bnxt: Add support for Broadcom StrataGX Communication Processors

[Ajit Khaparde <ajit.khaparde@broadcom.com>]

This patch adds support for the Broadcom StrataGX® BCM5871X
series of Communucations Processors.

These ARM based processors target a broad range of networking
applications including virtual CPE (vCPE) and NFV appliances,
10G service routers and gateways, control plane processing for
Ethernet switches, and network attached storage (NAS).

Other than adding the PCI Id for supporting the device,
the patch also adds a memory barrier before the Tx doorbell
and Completing ring doorbell is written to. Since ARM has a
weakly ordered memory model this enforces a strict ordering
of the descriptor writes before the doorbell writes happen.

Signed-off-by: John Carney <john.carney@broadcom.com>
Signed-off-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
---
 drivers/net/bnxt/bnxt_cpr.h    | 1 +
 drivers/net/bnxt/bnxt_ethdev.c | 2 ++
 drivers/net/bnxt/bnxt_txr.h    | 1 +
 3 files changed, 4 insertions(+)

diff --git a/drivers/net/bnxt/bnxt_cpr.h b/drivers/net/bnxt/bnxt_cpr.h
index c176f8c..f9f2adb 100644
--- a/drivers/net/bnxt/bnxt_cpr.h
+++ b/drivers/net/bnxt/bnxt_cpr.h
@@ -54,6 +54,7 @@
 				RING_CMP(cpr->cp_ring_struct, raw_cons)))
 
 #define B_CP_DIS_DB(cpr, raw_cons)					\
+		rte_smp_wmb();						\
 		(*(uint32_t *)((cpr)->cp_doorbell) = (DB_CP_FLAGS |	\
 				RING_CMP(cpr->cp_ring_struct, raw_cons)))
 
diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c
index 3795fac..93269df 100644
--- a/drivers/net/bnxt/bnxt_ethdev.c
+++ b/drivers/net/bnxt/bnxt_ethdev.c
@@ -62,6 +62,7 @@ static const char bnxt_version[] =
 #define BROADCOM_DEV_ID_57302 0x16c9
 #define BROADCOM_DEV_ID_57304_PF 0x16ca
 #define BROADCOM_DEV_ID_57304_VF 0x16cb
+#define BROADCOM_DEV_ID_NS2 0x16cd
 #define BROADCOM_DEV_ID_57402 0x16d0
 #define BROADCOM_DEV_ID_57404 0x16d1
 #define BROADCOM_DEV_ID_57406_PF 0x16d2
@@ -74,6 +75,7 @@ static struct rte_pci_id bnxt_pci_id_map[] = {
 	{ RTE_PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, BROADCOM_DEV_ID_57302) },
 	{ RTE_PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, BROADCOM_DEV_ID_57304_PF) },
 	{ RTE_PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, BROADCOM_DEV_ID_57304_VF) },
+	{ RTE_PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, BROADCOM_DEV_ID_NS2) },
 	{ RTE_PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, BROADCOM_DEV_ID_57402) },
 	{ RTE_PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, BROADCOM_DEV_ID_57404) },
 	{ RTE_PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, BROADCOM_DEV_ID_57406_PF) },
diff --git a/drivers/net/bnxt/bnxt_txr.h b/drivers/net/bnxt/bnxt_txr.h
index 2176aca..4c16101 100644
--- a/drivers/net/bnxt/bnxt_txr.h
+++ b/drivers/net/bnxt/bnxt_txr.h
@@ -38,6 +38,7 @@
 #define BNXT_TX_PUSH_THRESH 92
 
 #define B_TX_DB(db, prod)						\
+		rte_smp_wmb();						\
 		(*(uint32_t *)db = (DB_KEY_TX | prod))
 
 struct bnxt_tx_ring_info {
-- 
2.7.4 (Apple Git-66)