[dpdk-stable] [PATCH 11/24] net/hns3: get PCI revision ID

["Wei Hu (Xavier)" <huwei013@chinasoftinc.com>]

From: "Wei Hu (Xavier)" <xavier.huwei@huawei.com>

[ upstream commit 837740cfa37a4641b6e3fc2d92c6572fe3c9911f ]

The hns3 network engine is built-in multiple SoCs, such as kunpeng 920,
kunpeng 930, etc. The PCI revision id is 0x21 in kunpeng 920, and the PCI
revision id is 0x30 in kunpeng 930.

This patch gets PCI revision to identify different version of hardware
network engine.

Signed-off-by: Wei Hu (Xavier) <xavier.huwei@huawei.com>
---
 drivers/net/hns3/hns3_ethdev.c    | 12 ++++++++++++
 drivers/net/hns3/hns3_ethdev.h    |  5 +++++
 drivers/net/hns3/hns3_ethdev_vf.c | 13 +++++++++++++
 3 files changed, 30 insertions(+)

diff --git a/drivers/net/hns3/hns3_ethdev.c b/drivers/net/hns3/hns3_ethdev.c
index 0bad55030..fcd47ef9a 100644
--- a/drivers/net/hns3/hns3_ethdev.c
+++ b/drivers/net/hns3/hns3_ethdev.c
@@ -5392,9 +5392,21 @@ hns3_dev_init(struct rte_eth_dev *eth_dev)
 	struct hns3_adapter *hns = eth_dev->data->dev_private;
 	struct hns3_hw *hw = &hns->hw;
 	uint16_t device_id = pci_dev->id.device_id;
+	uint8_t revision;
 	int ret;
 
 	PMD_INIT_FUNC_TRACE();
+
+	/* Get PCI revision id */
+	ret = rte_pci_read_config(pci_dev, &revision, HNS3_PCI_REVISION_ID_LEN,
+				  HNS3_PCI_REVISION_ID);
+	if (ret != HNS3_PCI_REVISION_ID_LEN) {
+		PMD_INIT_LOG(ERR, "Failed to read pci revision id, ret = %d",
+			     ret);
+		return -EIO;
+	}
+	hw->revision = revision;
+
 	eth_dev->process_private = (struct hns3_process_private *)
 	    rte_zmalloc_socket("hns3_filter_list",
 			       sizeof(struct hns3_process_private),
diff --git a/drivers/net/hns3/hns3_ethdev.h b/drivers/net/hns3/hns3_ethdev.h
index df06ba3b0..ba06ed103 100644
--- a/drivers/net/hns3/hns3_ethdev.h
+++ b/drivers/net/hns3/hns3_ethdev.h
@@ -26,6 +26,10 @@
 #define HNS3_DEV_ID_100G_VF			0xA22E
 #define HNS3_DEV_ID_100G_RDMA_PFC_VF		0xA22F
 
+/* PCI Config offsets */
+#define HNS3_PCI_REVISION_ID			0x08
+#define HNS3_PCI_REVISION_ID_LEN		1
+
 #define HNS3_UC_MACADDR_NUM		128
 #define HNS3_VF_UC_MACADDR_NUM		48
 #define HNS3_MC_MACADDR_NUM		128
@@ -351,6 +355,7 @@ struct hns3_reset_data {
 struct hns3_hw {
 	struct rte_eth_dev_data *data;
 	void *io_base;
+	uint8_t revision;           /* PCI revision, low byte of class word */
 	struct hns3_cmq cmq;
 	struct hns3_mbx_resp_status mbx_resp; /* mailbox response */
 	struct hns3_mbx_arq_ring arq;         /* mailbox async rx queue */
diff --git a/drivers/net/hns3/hns3_ethdev_vf.c b/drivers/net/hns3/hns3_ethdev_vf.c
index d503d5011..99e09ec45 100644
--- a/drivers/net/hns3/hns3_ethdev_vf.c
+++ b/drivers/net/hns3/hns3_ethdev_vf.c
@@ -2392,12 +2392,25 @@ static const struct hns3_reset_ops hns3vf_reset_ops = {
 static int
 hns3vf_dev_init(struct rte_eth_dev *eth_dev)
 {
+	struct rte_device *dev = eth_dev->device;
+	struct rte_pci_device *pci_dev = RTE_DEV_TO_PCI(dev);
 	struct hns3_adapter *hns = eth_dev->data->dev_private;
 	struct hns3_hw *hw = &hns->hw;
+	uint8_t revision;
 	int ret;
 
 	PMD_INIT_FUNC_TRACE();
 
+	/* Get PCI revision id */
+	ret = rte_pci_read_config(pci_dev, &revision, HNS3_PCI_REVISION_ID_LEN,
+				  HNS3_PCI_REVISION_ID);
+	if (ret != HNS3_PCI_REVISION_ID_LEN) {
+		PMD_INIT_LOG(ERR, "Failed to read pci revision id, ret = %d",
+			     ret);
+		return -EIO;
+	}
+	hw->revision = revision;
+
 	eth_dev->process_private = (struct hns3_process_private *)
 	    rte_zmalloc_socket("hns3_filter_list",
 			       sizeof(struct hns3_process_private),
-- 
2.27.0