[PATCH 2/7] net/ngbe: support OEM subsystem vendor ID

[Jiawen Wu <jiawenwu@trustnetic.com>]

Add support for OEM subsystem vendor ID.

Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
---
 doc/guides/rel_notes/release_22_07.rst |  1 +
 drivers/net/ngbe/ngbe_ethdev.c         | 13 ++++++++++++-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/doc/guides/rel_notes/release_22_07.rst b/doc/guides/rel_notes/release_22_07.rst
index 96db85a707..b26efb8719 100644
--- a/doc/guides/rel_notes/release_22_07.rst
+++ b/doc/guides/rel_notes/release_22_07.rst
@@ -166,6 +166,7 @@ New Features
 * **Updated Wangxun ngbe driver.**
 
   * Added support for yt8531s PHY.
+  * Added support for OEM subsystem vendor ID.
 
 * **Updated Wangxun txgbe driver.**
 
diff --git a/drivers/net/ngbe/ngbe_ethdev.c b/drivers/net/ngbe/ngbe_ethdev.c
index 5ac1c27a58..c4216f7e34 100644
--- a/drivers/net/ngbe/ngbe_ethdev.c
+++ b/drivers/net/ngbe/ngbe_ethdev.c
@@ -315,6 +315,7 @@ eth_ngbe_dev_init(struct rte_eth_dev *eth_dev, void *init_params __rte_unused)
 	const struct rte_memzone *mz;
 	uint32_t ctrl_ext;
 	u32 led_conf = 0;
+	u32 ssid = 0;
 	int err, ret;
 
 	PMD_INIT_FUNC_TRACE();
@@ -359,7 +360,17 @@ eth_ngbe_dev_init(struct rte_eth_dev *eth_dev, void *init_params __rte_unused)
 	hw->back = pci_dev;
 	hw->device_id = pci_dev->id.device_id;
 	hw->vendor_id = pci_dev->id.vendor_id;
-	hw->sub_system_id = pci_dev->id.subsystem_device_id;
+	if (pci_dev->id.subsystem_vendor_id == PCI_VENDOR_ID_WANGXUN) {
+		hw->sub_system_id = pci_dev->id.subsystem_device_id;
+	} else {
+		ssid = ngbe_flash_read_dword(hw, 0xFFFDC);
+		if (ssid == 0x1) {
+			PMD_INIT_LOG(ERR,
+				"Read of internal subsystem device id failed\n");
+			return -ENODEV;
+		}
+		hw->sub_system_id = (u16)ssid >> 8 | (u16)ssid << 8;
+	}
 	ngbe_map_device_id(hw);
 	hw->hw_addr = (void *)pci_dev->mem_resource[0].addr;
 
-- 
2.27.0