idpf: add singleq start_xmit and napi poll

Add the start_xmit, TX and RX napi poll support for the single queue
model. Unlike split queue model, single queue uses same queue to post
buffer descriptors and completed descriptors.

Signed-off-by: Joshua Hay <[email protected]>
Co-developed-by: Alan Brady <[email protected]>
Signed-off-by: Alan Brady <[email protected]>
Co-developed-by: Madhu Chittim <[email protected]>
Signed-off-by: Madhu Chittim <[email protected]>
Co-developed-by: Phani Burra <[email protected]>
Signed-off-by: Phani Burra <[email protected]>
Reviewed-by: Sridhar Samudrala <[email protected]>
Reviewed-by: Willem de Bruijn <[email protected]>
Co-developed-by: Pavan Kumar Linga <[email protected]>
Signed-off-by: Pavan Kumar Linga <[email protected]>
Signed-off-by: Tony Nguyen <[email protected]>

Author: jahay1

drivers/net/ethernet/intel/idpf/idpf.h

@@ -14,6 +14,7 @@ struct idpf_vport_max_q;
 #include <linux/etherdevice.h>
 #include <linux/pci.h>
 #include <linux/bitfield.h>
+#include <linux/sctp.h>
 #include <net/gro.h>
 #include <linux/dim.h>
 
@@ -280,6 +281,7 @@ enum idpf_vport_flags {
  * @txq_grps: Array of TX queue groups
  * @txq_model: Split queue or single queue queuing model
  * @txqs: Used only in hotpath to get to the right queue very fast
+ * @crc_enable: Enable CRC insertion offload
  * @num_rxq: Number of allocated RX queues
  * @num_bufq: Number of allocated buffer queues
  * @rxq_desc_count: RX queue descriptor count. *MUST* have enough descriptors
@@ -326,6 +328,7 @@ struct idpf_vport {
 	struct idpf_txq_group *txq_grps;
 	u32 txq_model;
 	struct idpf_queue **txqs;
+	bool crc_enable;
 
 	u16 num_rxq;
 	u16 num_bufq;
@@ -534,6 +537,9 @@ struct idpf_vport_config {
  * @vc_state: Virtchnl message state
  * @vc_msg: Virtchnl message buffer
  * @dev_ops: See idpf_dev_ops
+ * @num_vfs: Number of allocated VFs through sysfs. PF does not directly talk
+ *	     to VFs but is used to initialize them
+ * @crc_enable: Enable CRC insertion offload
  * @req_tx_splitq: TX split or single queue model to request
  * @req_rx_splitq: RX split or single queue model to request
  * @vport_ctrl_lock: Lock to protect the vport control flow
@@ -587,6 +593,8 @@ struct idpf_adapter {
 	DECLARE_BITMAP(vc_state, IDPF_VC_NBITS);
 	char vc_msg[IDPF_CTLQ_MAX_BUF_LEN];
 	struct idpf_dev_ops dev_ops;
+	int num_vfs;
+	bool crc_enable;
 	bool req_tx_splitq;
 	bool req_rx_splitq;
 
@@ -848,5 +856,7 @@ int idpf_send_create_vport_msg(struct idpf_adapter *adapter,
 			       struct idpf_vport_max_q *max_q);
 int idpf_check_supported_desc_ids(struct idpf_vport *vport);
 int idpf_send_map_unmap_queue_vector_msg(struct idpf_vport *vport, bool map);
+int idpf_send_set_sriov_vfs_msg(struct idpf_adapter *adapter, u16 num_vfs);
+int idpf_sriov_configure(struct pci_dev *pdev, int num_vfs);
 
 #endif /* !_IDPF_H_ */

drivers/net/ethernet/intel/idpf/idpf_lan_txrx.h

@@ -64,6 +64,32 @@ enum idpf_rss_hash {
 #define IDPF_TXD_COMPLQ_QID_S		0
 #define IDPF_TXD_COMPLQ_QID_M		GENMASK_ULL(9, 0)
 
+/* For base mode TX descriptors */
+
+#define IDPF_TXD_CTX_QW0_TUNN_L4T_CS_S	23
+#define IDPF_TXD_CTX_QW0_TUNN_L4T_CS_M	BIT_ULL(IDPF_TXD_CTX_QW0_TUNN_L4T_CS_S)
+#define IDPF_TXD_CTX_QW0_TUNN_DECTTL_S	19
+#define IDPF_TXD_CTX_QW0_TUNN_DECTTL_M	\
+	(0xFULL << IDPF_TXD_CTX_QW0_TUNN_DECTTL_S)
+#define IDPF_TXD_CTX_QW0_TUNN_NATLEN_S	12
+#define IDPF_TXD_CTX_QW0_TUNN_NATLEN_M	\
+	(0X7FULL << IDPF_TXD_CTX_QW0_TUNN_NATLEN_S)
+#define IDPF_TXD_CTX_QW0_TUNN_EIP_NOINC_S	11
+#define IDPF_TXD_CTX_QW0_TUNN_EIP_NOINC_M    \
+	BIT_ULL(IDPF_TXD_CTX_QW0_TUNN_EIP_NOINC_S)
+#define IDPF_TXD_CTX_EIP_NOINC_IPID_CONST	\
+	IDPF_TXD_CTX_QW0_TUNN_EIP_NOINC_M
+#define IDPF_TXD_CTX_QW0_TUNN_NATT_S	        9
+#define IDPF_TXD_CTX_QW0_TUNN_NATT_M	(0x3ULL << IDPF_TXD_CTX_QW0_TUNN_NATT_S)
+#define IDPF_TXD_CTX_UDP_TUNNELING	BIT_ULL(IDPF_TXD_CTX_QW0_TUNN_NATT_S)
+#define IDPF_TXD_CTX_GRE_TUNNELING	(0x2ULL << IDPF_TXD_CTX_QW0_TUNN_NATT_S)
+#define IDPF_TXD_CTX_QW0_TUNN_EXT_IPLEN_S	2
+#define IDPF_TXD_CTX_QW0_TUNN_EXT_IPLEN_M	\
+	(0x3FULL << IDPF_TXD_CTX_QW0_TUNN_EXT_IPLEN_S)
+#define IDPF_TXD_CTX_QW0_TUNN_EXT_IP_S	0
+#define IDPF_TXD_CTX_QW0_TUNN_EXT_IP_M	\
+	(0x3ULL << IDPF_TXD_CTX_QW0_TUNN_EXT_IP_S)
+
 #define IDPF_TXD_CTX_QW1_MSS_S		50
 #define IDPF_TXD_CTX_QW1_MSS_M		GENMASK_ULL(63, 50)
 #define IDPF_TXD_CTX_QW1_TSO_LEN_S	30
@@ -112,6 +138,27 @@ enum idpf_tx_desc_dtype_value {
 	IDPF_TX_DESC_DTYPE_DESC_DONE			= 15,
 };
 
+enum idpf_tx_ctx_desc_cmd_bits {
+	IDPF_TX_CTX_DESC_TSO		= 0x01,
+	IDPF_TX_CTX_DESC_TSYN		= 0x02,
+	IDPF_TX_CTX_DESC_IL2TAG2	= 0x04,
+	IDPF_TX_CTX_DESC_RSVD		= 0x08,
+	IDPF_TX_CTX_DESC_SWTCH_NOTAG	= 0x00,
+	IDPF_TX_CTX_DESC_SWTCH_UPLINK	= 0x10,
+	IDPF_TX_CTX_DESC_SWTCH_LOCAL	= 0x20,
+	IDPF_TX_CTX_DESC_SWTCH_VSI	= 0x30,
+	IDPF_TX_CTX_DESC_FILT_AU_EN	= 0x40,
+	IDPF_TX_CTX_DESC_FILT_AU_EVICT	= 0x80,
+	IDPF_TX_CTX_DESC_RSVD1		= 0xF00
+};
+
+enum idpf_tx_desc_len_fields {
+	/* Note: These are predefined bit offsets */
+	IDPF_TX_DESC_LEN_MACLEN_S	= 0, /* 7 BITS */
+	IDPF_TX_DESC_LEN_IPLEN_S	= 7, /* 7 BITS */
+	IDPF_TX_DESC_LEN_L4_LEN_S	= 14 /* 4 BITS */
+};
+
 enum idpf_tx_base_desc_cmd_bits {
 	IDPF_TX_DESC_CMD_EOP			= BIT(0),
 	IDPF_TX_DESC_CMD_RS			= BIT(1),
@@ -148,6 +195,16 @@ struct idpf_splitq_tx_compl_desc {
 	u8 rsvd; /* Reserved */
 }; /* writeback used with completion queues */
 
+/* Context descriptors */
+struct idpf_base_tx_ctx_desc {
+	struct {
+		__le32 tunneling_params;
+		__le16 l2tag2;
+		__le16 rsvd1;
+	} qw0;
+	__le64 qw1; /* type_cmd_tlen_mss/rt_hint */
+};
+
 /* Common cmd field defines for all desc except Flex Flow Scheduler (0x0C) */
 enum idpf_tx_flex_desc_cmd_bits {
 	IDPF_TX_FLEX_DESC_CMD_EOP			= BIT(0),

drivers/net/ethernet/intel/idpf/idpf_lib.c

@@ -1565,4 +1565,5 @@ static const struct net_device_ops idpf_netdev_ops_splitq = {
 static const struct net_device_ops idpf_netdev_ops_singleq = {
 	.ndo_open = idpf_open,
 	.ndo_stop = idpf_stop,
+	.ndo_start_xmit = idpf_tx_singleq_start,
 };

drivers/net/ethernet/intel/idpf/idpf_main.c

@@ -133,6 +133,7 @@ static int idpf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		break;
 	case IDPF_DEV_ID_VF:
 		idpf_vf_dev_ops_init(adapter);
+		adapter->crc_enable = true;
 		break;
 	default:
 		err = -ENODEV;