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 <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

drivers/net/ethernet/sfc/Kconfig

@@ -17,7 +17,7 @@ config NET_VENDOR_SOLARFLARE
 if NET_VENDOR_SOLARFLARE
 
 config SFC
-	tristate "Solarflare SFC9000/SFC9100-family support"
+	tristate "Solarflare SFC9000/SFC9100/EF100-family support"
 	depends on PCI
 	select MDIO
 	select CRC32
@@ -26,6 +26,9 @@ config SFC
 	  This driver supports 10/40-gigabit Ethernet cards based on
 	  the Solarflare SFC9000-family and SFC9100-family controllers.
 
+	  It also supports 10/25/40/100-gigabit Ethernet cards based
+	  on the Solarflare EF100 networking IP in Xilinx FPGAs.
+
 	  To compile this driver as a module, choose M here.  The module
 	  will be called sfc.
 config SFC_MTD

drivers/net/ethernet/sfc/Makefile

@@ -4,7 +4,9 @@ sfc-y			+= efx.o efx_common.o efx_channels.o nic.o \
 			   tx.o tx_common.o tx_tso.o rx.o rx_common.o \
 			   selftest.o ethtool.o ethtool_common.o ptp.o \
 			   mcdi.o mcdi_port.o mcdi_port_common.o \
-			   mcdi_functions.o mcdi_filters.o mcdi_mon.o
+			   mcdi_functions.o mcdi_filters.o mcdi_mon.o \
+			   ef100.o ef100_nic.o ef100_netdev.o \
+			   ef100_ethtool.o ef100_rx.o ef100_tx.o
 sfc-$(CONFIG_SFC_MTD)	+= mtd.o
 sfc-$(CONFIG_SFC_SRIOV)	+= sriov.o siena_sriov.o ef10_sriov.o
 

drivers/net/ethernet/sfc/ef10.c

@@ -6,6 +6,7 @@
 
 #include "net_driver.h"
 #include "rx_common.h"
+#include "tx_common.h"
 #include "ef10_regs.h"
 #include "io.h"
 #include "mcdi.h"
@@ -3977,13 +3978,15 @@ const struct efx_nic_type efx_hunt_a0_vf_nic_type = {
 	.tx_remove = efx_mcdi_tx_remove,
 	.tx_write = efx_ef10_tx_write,
 	.tx_limit_len = efx_ef10_tx_limit_len,
+	.tx_enqueue = __efx_enqueue_skb,
 	.rx_push_rss_config = efx_mcdi_vf_rx_push_rss_config,
 	.rx_pull_rss_config = efx_mcdi_rx_pull_rss_config,
 	.rx_probe = efx_mcdi_rx_probe,
 	.rx_init = efx_mcdi_rx_init,
 	.rx_remove = efx_mcdi_rx_remove,
 	.rx_write = efx_ef10_rx_write,
 	.rx_defer_refill = efx_ef10_rx_defer_refill,
+	.rx_packet = __efx_rx_packet,
 	.ev_probe = efx_mcdi_ev_probe,
 	.ev_init = efx_ef10_ev_init,
 	.ev_fini = efx_mcdi_ev_fini,
@@ -4038,6 +4041,7 @@ const struct efx_nic_type efx_hunt_a0_vf_nic_type = {
 	.rx_hash_key_size = 40,
 	.check_caps = ef10_check_caps,
 	.print_additional_fwver = efx_ef10_print_additional_fwver,
+	.sensor_event = efx_mcdi_sensor_event,
 };
 
 const struct efx_nic_type efx_hunt_a0_nic_type = {
@@ -4087,6 +4091,7 @@ const struct efx_nic_type efx_hunt_a0_nic_type = {
 	.tx_remove = efx_mcdi_tx_remove,
 	.tx_write = efx_ef10_tx_write,
 	.tx_limit_len = efx_ef10_tx_limit_len,
+	.tx_enqueue = __efx_enqueue_skb,
 	.rx_push_rss_config = efx_mcdi_pf_rx_push_rss_config,
 	.rx_pull_rss_config = efx_mcdi_rx_pull_rss_config,
 	.rx_push_rss_context_config = efx_mcdi_rx_push_rss_context_config,
@@ -4097,6 +4102,7 @@ const struct efx_nic_type efx_hunt_a0_nic_type = {
 	.rx_remove = efx_mcdi_rx_remove,
 	.rx_write = efx_ef10_rx_write,
 	.rx_defer_refill = efx_ef10_rx_defer_refill,
+	.rx_packet = __efx_rx_packet,
 	.ev_probe = efx_mcdi_ev_probe,
 	.ev_init = efx_ef10_ev_init,
 	.ev_fini = efx_mcdi_ev_fini,
@@ -4172,4 +4178,5 @@ const struct efx_nic_type efx_hunt_a0_nic_type = {
 	.rx_hash_key_size = 40,
 	.check_caps = ef10_check_caps,
 	.print_additional_fwver = efx_ef10_print_additional_fwver,
+	.sensor_event = efx_mcdi_sensor_event,
 };