[sfc] Add support for X25xx adapters

The first adapters in this family are X2522-10, X2522-25, X2541 and
X2542.

These no longer use PCI BAR 0 for I/O, but use that for memory.  In
other words, BAR 2 on SFN8xxx adapters now becomes BAR 0.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/drivers/net/sfc/efx_common.c

 	struct efx_nic *efx = netdev_priv(netdev);
 	struct pci_device *pci = container_of(netdev->dev,
 					      struct pci_device, dev);
+	unsigned int reg = PCI_BASE_ADDRESS_0;
+	uint32_t bar_low;
 
 	efx->netdev = netdev;
 	efx->revision = revision;
 
-	/* MMIO bar */
-	efx->mmio_start = pci_bar_start(pci, PCI_BASE_ADDRESS_2);
-	efx->mmio_len = pci_bar_size(pci, PCI_BASE_ADDRESS_2);
+	/* Find the memory bar to use */
+	pci_read_config_dword(pci, reg, &bar_low);
+	if ((bar_low & PCI_BASE_ADDRESS_IO_MASK) == PCI_BASE_ADDRESS_SPACE_IO)
+		reg = PCI_BASE_ADDRESS_2;
+
+	efx->mmio_start = pci_bar_start(pci, reg);
+	efx->mmio_len = pci_bar_size(pci, reg);
 	efx->membase = ioremap(efx->mmio_start, efx->mmio_len);
 
 	DBGCP(efx, "BAR of %lx bytes at phys %lx mapped at %p\n",

src/drivers/net/sfc/sfc_hunt.c

 	hdr_len = sizeof(hdr);
 
 	memcpy(pdu, &hdr, hdr_len);
+	assert(inlen <= MCDI_CTL_SDU_LEN_MAX_V2);
 	memcpy(pdu + hdr_len, inbuf, inlen);
 
 	wmb();	/* Sync the data before ringing the doorbell */
 
 static struct pci_device_id hunt_nics[] = {
 	PCI_ROM(0x1924, 0x0a03, "SFC9220", "Solarflare SFN8xxx Adapter", 0),
+	PCI_ROM(0x1924, 0x0b03, "SFC9250", "Solarflare X25xx Adapter", 0),
 };
 
 struct pci_driver hunt_driver __pci_driver = {