net: hns3: support RXD advanced layout

Currently, the driver gets packet type by parsing the
L3_ID/L4_ID/OL3_ID/OL4_ID from RX descriptor, it's
time-consuming.

Now some new devices support RXD advanced layout, which combines
previous OL3_ID/OL4_ID to 8bit ptype field, so the driver gets
packet type by looking up only one table, and L3_ID/L4_ID become
reserved fields.

Considering compatibility, the firmware will report capability of
RXD advanced layout, the driver will identify and enable it by
default. This patch provides basic function: identify and enable
the RXD advanced layout, and refactor out hns3_rx_checksum() by
using ptype table to handle RX checksum if supported.

Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/hisilicon/hns3/hnae3.h

@@ -91,6 +91,7 @@ enum HNAE3_DEV_CAP_BITS {
 	HNAE3_DEV_SUPPORT_STASH_B,
 	HNAE3_DEV_SUPPORT_UDP_TUNNEL_CSUM_B,
 	HNAE3_DEV_SUPPORT_PAUSE_B,
+	HNAE3_DEV_SUPPORT_RXD_ADV_LAYOUT_B,
 };
 
 #define hnae3_dev_fd_supported(hdev) \
@@ -141,6 +142,9 @@ enum HNAE3_DEV_CAP_BITS {
 #define hnae3_ae_dev_tqp_txrx_indep_supported(ae_dev) \
 	test_bit(HNAE3_DEV_SUPPORT_TQP_TXRX_INDEP_B, (ae_dev)->caps)
 
+#define hnae3_ae_dev_rxd_adv_layout_supported(ae_dev) \
+	test_bit(HNAE3_DEV_SUPPORT_RXD_ADV_LAYOUT_B, (ae_dev)->caps)
+
 #define ring_ptr_move_fw(ring, p) \
 	((ring)->p = ((ring)->p + 1) % (ring)->desc_num)
 #define ring_ptr_move_bw(ring, p) \

drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c

@@ -367,6 +367,9 @@ static void hns3_dbg_dev_caps(struct hnae3_handle *h)
 		 "yes" : "no");
 	dev_info(&h->pdev->dev, "support imp-controlled PHY: %s\n",
 		 test_bit(HNAE3_DEV_SUPPORT_PHY_IMP_B, caps) ? "yes" : "no");
+	dev_info(&h->pdev->dev, "support rxd advanced layout: %s\n",
+		 test_bit(HNAE3_DEV_SUPPORT_RXD_ADV_LAYOUT_B, caps) ?
+		 "yes" : "no");
 }
 
 static void hns3_dbg_dev_specs(struct hnae3_handle *h)