sfc: separate out SFC4000 ("Falcon") support into new sfc-falcon driver

Rationale: The differences between Falcon and Siena are in many ways larger
 than those between Siena and EF10 (despite Siena being nominally "Falcon-
 architecture"); for instance, Falcon has no MCPU, so there is no MCDI.
 Removing Falcon support from the sfc driver should simplify the latter,
 and avoid the possibility of Falcon support being broken by changes to sfc
 (which are rarely if ever tested on Falcon, it being end-of-lifed hardware).

The sfc-falcon driver created in this changeset is essentially a copy of the
 sfc driver, but with Siena- and EF10-specific code, including MCDI, removed
 and with the "efx_" identifier prefix changed to "ef4_" (for "EFX 4000-
 series") to avoid collisions when both drivers are built-in.

This changeset removes Falcon from the sfc driver's PCI ID table; then in
 sfc I've removed obvious Falcon-related code: I removed the Falcon NIC
 functions, Falcon PHY code, and EFX_REV_FALCON_*, then fixed up everything
 that referenced them.

Also, increment minor version of both drivers (to 4.1).

For now, CONFIG_SFC selects CONFIG_SFC_FALCON, so that updating old configs
 doesn't cause Falcon support to disappear; but that should be undone at
 some point in the future.

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

1 files changed, 21 insertions, 0 deletions

diff --git a/drivers/net/ethernet/sfc/falcon/Kconfig b/drivers/net/ethernet/sfc/falcon/Kconfig
new file mode 100644
index 000000000000..6248e96253a2
--- /dev/null
+++ b/drivers/net/ethernet/sfc/falcon/Kconfig
@@ -0,0 +1,21 @@
+config SFC_FALCON
+	tristate "Solarflare SFC4000 support"
+	depends on PCI
+	select MDIO
+	select CRC32
+	select I2C
+	select I2C_ALGOBIT
+	---help---
+	  This driver supports 10-gigabit Ethernet cards based on
+	  the Solarflare SFC4000 controller.
+
+	  To compile this driver as a module, choose M here.  The module
+	  will be called sfc-falcon.
+config SFC_FALCON_MTD
+	bool "Solarflare SFC4000 MTD support"
+	depends on SFC_FALCON && MTD && !(SFC_FALCON=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 boot
+	  configuration under Linux.