sfc: Add support for Solarflare SFC9100 family

This adds support for the EF10 network controller architecture and the
SFC9100 family, starting with SFC9120 'Farmingdale', and bumps the
driver version to 4.0.

New features in the SFC9100 family include:

- Flexible allocation of internal resources to PCIe physical and virtual
  functions under firmware control
- RX event merging to reduce DMA writes at high packet rates
- Integrated RX timestamping
- PIO buffers for lower TX latency
- Firmware-driven data path that supports additional offload features
  and filter types
- Delivery of packets between functions and to multiple recipients,
  allowing firmware to implement a vswitch
- Multiple RX flow hash (RSS) contexts with their own hash keys and
  indirection tables
- 40G MAC (single port only)

...not all of which are enabled in this initial driver or the initial
firmware release.

Much of the new code is by Jon Cooper.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

drivers/net/ethernet/sfc/Kconfig

@@ -1,5 +1,5 @@
 config SFC
-	tristate "Solarflare SFC4000/SFC9000-family support"
+	tristate "Solarflare SFC4000/SFC9000/SFC9100-family support"
 	depends on PCI
 	select MDIO
 	select CRC32
@@ -8,20 +8,21 @@ config SFC
 	select PTP_1588_CLOCK
 	---help---
 	  This driver supports 10-gigabit Ethernet cards based on
-	  the Solarflare SFC4000 and SFC9000-family controllers.
+	  the Solarflare SFC4000, SFC9000-family and SFC9100-family
+	  controllers.
 
 	  To compile this driver as a module, choose M here.  The module
 	  will be called sfc.
 config SFC_MTD
-	bool "Solarflare SFC4000/SFC9000-family MTD support"
+	bool "Solarflare SFC4000/SFC9000/SFC9100-family MTD support"
 	depends on SFC && MTD && !(SFC=y && MTD=m)
 	default y
 	---help---
 	  This exposes the on-board flash and/or EEPROM as MTD devices
 	  (e.g. /dev/mtd1).  This is required to update the firmware or
 	  the boot configuration under Linux.
 config SFC_MCDI_MON
-	bool "Solarflare SFC9000-family hwmon support"
+	bool "Solarflare SFC9000/SFC9100-family hwmon support"
 	depends on SFC && HWMON && !(SFC=y && HWMON=m)
 	default y
 	---help---

drivers/net/ethernet/sfc/Makefile

@@ -1,5 +1,5 @@
-sfc-y			+= efx.o nic.o farch.o falcon.o siena.o tx.o rx.o \
-			   selftest.o ethtool.o qt202x_phy.o mdio_10g.o \
+sfc-y			+= efx.o nic.o farch.o falcon.o siena.o ef10.o tx.o \
+			   rx.o selftest.o ethtool.o qt202x_phy.o mdio_10g.o \
 			   tenxpress.o txc43128_phy.o falcon_boards.o \
 			   mcdi.o mcdi_port.o mcdi_mon.o ptp.o
 sfc-$(CONFIG_SFC_MTD)	+= mtd.o

drivers/net/ethernet/sfc/bitfield.h

@@ -29,6 +29,10 @@
 /* Lowest bit numbers and widths */
 #define EFX_DUMMY_FIELD_LBN 0
 #define EFX_DUMMY_FIELD_WIDTH 0
+#define EFX_WORD_0_LBN 0
+#define EFX_WORD_0_WIDTH 16
+#define EFX_WORD_1_LBN 16
+#define EFX_WORD_1_WIDTH 16
 #define EFX_DWORD_0_LBN 0
 #define EFX_DWORD_0_WIDTH 32
 #define EFX_DWORD_1_LBN 32