sfc: skeleton EF100 PF driver

No TX or RX path, no MCDI, not even an ifup/down handler.
Besides stubs, the bulk of the patch deals with reading the Xilinx
 extended PCIe capability, which tells us where to find our BAR.

Though in the same module, EF100 has its own struct pci_driver,
 which is named sfc_ef100.

A small number of additional nic_type methods are added; those in the
 TX (tx_enqueue) and RX (rx_packet) paths are called through indirect
 call wrappers to minimise the performance impact.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 16 insertions, 0 deletions

diff --git a/drivers/net/ethernet/sfc/net_driver.h b/drivers/net/ethernet/sfc/net_driver.h
index db35beabdcff..9791fac0b649 100644
--- a/drivers/net/ethernet/sfc/net_driver.h
+++ b/drivers/net/ethernet/sfc/net_driver.h
@@ -963,6 +963,7 @@ struct efx_async_filter_insertion {
  * @vpd_sn: Serial number read from VPD
  * @xdp_rxq_info_failed: Have any of the rx queues failed to initialise their
  *      xdp_rxq_info structures?
+ * @netdev_notifier: Netdevice notifier.
  * @mem_bar: The BAR that is mapped into membase.
  * @reg_base: Offset from the start of the bar to the function control window.
  * @monitor_work: Hardware monitor workitem
@@ -1142,6 +1143,8 @@ struct efx_nic {
 	char *vpd_sn;
 	bool xdp_rxq_info_failed;
 
+	struct notifier_block netdev_notifier;
+
 	unsigned int mem_bar;
 	u32 reg_base;
 
@@ -1246,6 +1249,7 @@ struct efx_udp_tunnel {
  * @tx_init: Initialise TX queue on the NIC
  * @tx_remove: Free resources for TX queue
  * @tx_write: Write TX descriptors and doorbell
+ * @tx_enqueue: Add an SKB to TX queue
  * @rx_push_rss_config: Write RSS hash key and indirection table to the NIC
  * @rx_pull_rss_config: Read RSS hash key and indirection table back from the NIC
  * @rx_push_rss_context_config: Write RSS hash key and indirection table for
@@ -1257,6 +1261,7 @@ struct efx_udp_tunnel {
  * @rx_remove: Free resources for RX queue
  * @rx_write: Write RX descriptors and doorbell
  * @rx_defer_refill: Generate a refill reminder event
+ * @rx_packet: Receive the queued RX buffer on a channel
  * @ev_probe: Allocate resources for event queue
  * @ev_init: Initialise event queue on the NIC
  * @ev_fini: Deinitialise event queue on the NIC
@@ -1301,6 +1306,7 @@ struct efx_udp_tunnel {
  * @udp_tnl_push_ports: Push the list of UDP tunnel ports to the NIC if required.
  * @udp_tnl_has_port: Check if a port has been added as UDP tunnel
  * @print_additional_fwver: Dump NIC-specific additional FW version info
+ * @sensor_event: Handle a sensor event from MCDI
  * @revision: Hardware architecture revision
  * @txd_ptr_tbl_base: TX descriptor ring base address
  * @rxd_ptr_tbl_base: RX descriptor ring base address
@@ -1381,6 +1387,7 @@ struct efx_nic_type {
 	void (*tx_init)(struct efx_tx_queue *tx_queue);
 	void (*tx_remove)(struct efx_tx_queue *tx_queue);
 	void (*tx_write)(struct efx_tx_queue *tx_queue);
+	netdev_tx_t (*tx_enqueue)(struct efx_tx_queue *tx_queue, struct sk_buff *skb);
 	unsigned int (*tx_limit_len)(struct efx_tx_queue *tx_queue,
 				     dma_addr_t dma_addr, unsigned int len);
 	int (*rx_push_rss_config)(struct efx_nic *efx, bool user,
@@ -1398,6 +1405,7 @@ struct efx_nic_type {
 	void (*rx_remove)(struct efx_rx_queue *rx_queue);
 	void (*rx_write)(struct efx_rx_queue *rx_queue);
 	void (*rx_defer_refill)(struct efx_rx_queue *rx_queue);
+	void (*rx_packet)(struct efx_channel *channel);
 	int (*ev_probe)(struct efx_channel *channel);
 	int (*ev_init)(struct efx_channel *channel);
 	void (*ev_fini)(struct efx_channel *channel);
@@ -1472,6 +1480,7 @@ struct efx_nic_type {
 	bool (*udp_tnl_has_port)(struct efx_nic *efx, __be16 port);
 	size_t (*print_additional_fwver)(struct efx_nic *efx, char *buf,
 					 size_t len);
+	void (*sensor_event)(struct efx_nic *efx, efx_qword_t *ev);
 
 	int revision;
 	unsigned int txd_ptr_tbl_base;
@@ -1523,6 +1532,13 @@ efx_get_channel(struct efx_nic *efx, unsigned index)
 	     _channel = _channel->channel ?				\
 		     (_efx)->channel[_channel->channel - 1] : NULL)
 
+static inline struct efx_channel *
+efx_get_tx_channel(struct efx_nic *efx, unsigned int index)
+{
+	EFX_WARN_ON_ONCE_PARANOID(index >= efx->n_tx_channels);
+	return efx->channel[efx->tx_channel_offset + index];
+}
+
 static inline struct efx_tx_queue *
 efx_get_tx_queue(struct efx_nic *efx, unsigned index, unsigned type)
 {