idpf: add ethtool callbacks

Initialize all the ethtool ops that are supported by the driver and
add the necessary support for the ethtool callbacks. Also add
asynchronous link notification virtchnl support where the device
Control Plane sends the link status and link speed as an
asynchronous event message. Driver report the link speed on
ethtool .idpf_get_link_ksettings query.

Introduce soft reset function which is used by some of the ethtool
callbacks such as .set_channels, .set_ringparam etc. to change the
existing queue configuration. It deletes the existing queues by sending
delete queues virtchnl message to the CP and calls the 'vport_stop' flow
which disables the queues, vport etc. New set of queues are requested to
the CP and reconfigure the queue context by calling the 'vport_open'
flow. Soft reset flow also adjusts the number of vectors associated to a
vport if .set_channels is called.

Signed-off-by: Alan Brady <[email protected]>
Co-developed-by: Alice Michael <[email protected]>
Signed-off-by: Alice Michael <[email protected]>
Co-developed-by: Joshua Hay <[email protected]>
Signed-off-by: Joshua Hay <[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: atbrady-intel

drivers/net/ethernet/intel/idpf/Makefile

@@ -9,6 +9,7 @@ idpf-y := \
 	idpf_controlq.o		\
 	idpf_controlq_setup.o	\
 	idpf_dev.o		\
+	idpf_ethtool.o		\
 	idpf_lib.o		\
 	idpf_main.o		\
 	idpf_singleq_txrx.o	\

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

@@ -15,6 +15,7 @@ struct idpf_vport_max_q;
 #include <linux/pci.h>
 #include <linux/bitfield.h>
 #include <linux/sctp.h>
+#include <linux/ethtool.h>
 #include <net/gro.h>
 #include <linux/dim.h>
 
@@ -230,6 +231,10 @@ struct idpf_dev_ops {
 	STATE(IDPF_VC_MAP_IRQ_ERR)		\
 	STATE(IDPF_VC_UNMAP_IRQ)		\
 	STATE(IDPF_VC_UNMAP_IRQ_ERR)		\
+	STATE(IDPF_VC_ADD_QUEUES)		\
+	STATE(IDPF_VC_ADD_QUEUES_ERR)		\
+	STATE(IDPF_VC_DEL_QUEUES)		\
+	STATE(IDPF_VC_DEL_QUEUES_ERR)		\
 	STATE(IDPF_VC_ALLOC_VECTORS)		\
 	STATE(IDPF_VC_ALLOC_VECTORS_ERR)	\
 	STATE(IDPF_VC_DEALLOC_VECTORS)		\
@@ -259,17 +264,42 @@ enum idpf_vport_vc_state {
 
 extern const char * const idpf_vport_vc_state_str[];
 
+/**
+ * enum idpf_vport_reset_cause - Vport soft reset causes
+ * @IDPF_SR_Q_CHANGE: Soft reset queue change
+ * @IDPF_SR_Q_DESC_CHANGE: Soft reset descriptor change
+ */
+enum idpf_vport_reset_cause {
+	IDPF_SR_Q_CHANGE,
+	IDPF_SR_Q_DESC_CHANGE,
+};
+
 /**
  * enum idpf_vport_flags - Vport flags
+ * @IDPF_VPORT_DEL_QUEUES: To send delete queues message
  * @IDPF_VPORT_SW_MARKER: Indicate TX pipe drain software marker packets
  *			  processing is done
  * @IDPF_VPORT_FLAGS_NBITS: Must be last
  */
 enum idpf_vport_flags {
+	IDPF_VPORT_DEL_QUEUES,
 	IDPF_VPORT_SW_MARKER,
 	IDPF_VPORT_FLAGS_NBITS,
 };
 
+struct idpf_port_stats {
+	struct u64_stats_sync stats_sync;
+	u64_stats_t rx_hw_csum_err;
+	u64_stats_t rx_hsplit;
+	u64_stats_t rx_hsplit_hbo;
+	u64_stats_t rx_bad_descs;
+	u64_stats_t tx_linearize;
+	u64_stats_t tx_busy;
+	u64_stats_t tx_drops;
+	u64_stats_t tx_dma_map_errs;
+	struct virtchnl2_vport_stats vport_stats;
+};
+
 /**
  * struct idpf_vport - Handle for netdevices and queue resources
  * @num_txq: Number of allocated TX queues
@@ -311,7 +341,9 @@ enum idpf_vport_flags {
  * @default_mac_addr: device will give a default MAC to use
  * @rx_itr_profile: RX profiles for Dynamic Interrupt Moderation
  * @tx_itr_profile: TX profiles for Dynamic Interrupt Moderation
+ * @port_stats: per port csum, header split, and other offload stats
  * @link_up: True if link is up
+ * @link_speed_mbps: Link speed in mbps
  * @vc_msg: Virtchnl message buffer
  * @vc_state: Virtchnl message state
  * @vchnl_wq: Wait queue for virtchnl messages
@@ -357,8 +389,10 @@ struct idpf_vport {
 	u8 default_mac_addr[ETH_ALEN];
 	u16 rx_itr_profile[IDPF_DIM_PROFILE_SLOTS];
 	u16 tx_itr_profile[IDPF_DIM_PROFILE_SLOTS];
+	struct idpf_port_stats port_stats;
 
 	bool link_up;
+	u32 link_speed_mbps;
 
 	char vc_msg[IDPF_CTLQ_MAX_BUF_LEN];
 	DECLARE_BITMAP(vc_state, IDPF_VC_NBITS);
@@ -767,6 +801,17 @@ static inline struct idpf_vport *idpf_netdev_to_vport(struct net_device *netdev)
 	return np->vport;
 }
 
+/**
+ * idpf_netdev_to_adapter - Get adapter handle from a netdev
+ * @netdev: Network interface device structure
+ */
+static inline struct idpf_adapter *idpf_netdev_to_adapter(struct net_device *netdev)
+{
+	struct idpf_netdev_priv *np = netdev_priv(netdev);
+
+	return np->adapter;
+}
+
 /**
  * idpf_is_feature_ena - Determine if a particular feature is enabled
  * @vport: Vport to check
@@ -811,6 +856,7 @@ void idpf_mbx_task(struct work_struct *work);
 void idpf_vc_event_task(struct work_struct *work);
 void idpf_dev_ops_init(struct idpf_adapter *adapter);
 void idpf_vf_dev_ops_init(struct idpf_adapter *adapter);
+int idpf_vport_adjust_qs(struct idpf_vport *vport);
 int idpf_init_dflt_mbx(struct idpf_adapter *adapter);
 void idpf_deinit_dflt_mbx(struct idpf_adapter *adapter);
 int idpf_vc_core_init(struct idpf_adapter *adapter);
@@ -819,6 +865,11 @@ int idpf_intr_req(struct idpf_adapter *adapter);
 void idpf_intr_rel(struct idpf_adapter *adapter);
 int idpf_get_reg_intr_vecs(struct idpf_vport *vport,
 			   struct idpf_vec_regs *reg_vals);
+int idpf_send_delete_queues_msg(struct idpf_vport *vport);
+int idpf_send_add_queues_msg(const struct idpf_vport *vport, u16 num_tx_q,
+			     u16 num_complq, u16 num_rx_q, u16 num_rx_bufq);
+int idpf_initiate_soft_reset(struct idpf_vport *vport,
+			     enum idpf_vport_reset_cause reset_cause);
 int idpf_send_enable_vport_msg(struct idpf_vport *vport);
 int idpf_send_disable_vport_msg(struct idpf_vport *vport);
 int idpf_send_destroy_vport_msg(struct idpf_vport *vport);
@@ -831,13 +882,15 @@ void idpf_deinit_task(struct idpf_adapter *adapter);
 int idpf_req_rel_vector_indexes(struct idpf_adapter *adapter,
 				u16 *q_vector_idxs,
 				struct idpf_vector_info *vec_info);
+int idpf_vport_alloc_vec_indexes(struct idpf_vport *vport);
 int idpf_get_vec_ids(struct idpf_adapter *adapter,
 		     u16 *vecids, int num_vecids,
 		     struct virtchnl2_vector_chunks *chunks);
 int idpf_recv_mb_msg(struct idpf_adapter *adapter, u32 op,
 		     void *msg, int msg_size);
 int idpf_send_mb_msg(struct idpf_adapter *adapter, u32 op,
 		     u16 msg_size, u8 *msg);
+void idpf_set_ethtool_ops(struct net_device *netdev);
 int idpf_vport_alloc_max_qs(struct idpf_adapter *adapter,
 			    struct idpf_vport_max_q *max_q);
 void idpf_vport_dealloc_max_qs(struct idpf_adapter *adapter,
@@ -855,6 +908,8 @@ int idpf_send_enable_queues_msg(struct idpf_vport *vport);
 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);
+void idpf_vport_intr_write_itr(struct idpf_q_vector *q_vector,
+			       u16 itr, bool tx);
 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);