sfc: Add support for SFC9000 family (2)

This integrates support for the SFC9000 family of 10G Ethernet
controllers and LAN-on-motherboard chips, starting with the SFL9021
'Siena' and SFC9020 'Bethpage'.

Credit for this code is largely due to my colleagues at Solarflare:

   Guido Barzini
   Steve Hodgson
   Kieran Mansley
   Matthew Slattery
   Neil Turton

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/sfc/Kconfig

@@ -1,21 +1,22 @@
 config SFC
-	tristate "Solarflare Solarstorm SFC4000 support"
+	tristate "Solarflare Solarstorm SFC4000/SFC9000-family support"
 	depends on PCI && INET
 	select MDIO
 	select CRC32
 	select I2C
 	select I2C_ALGOBIT
 	help
 	  This driver supports 10-gigabit Ethernet cards based on
-	  the Solarflare Communications Solarstorm SFC4000 controller.
+	  the Solarflare Communications Solarstorm SFC4000 and
+	  SFC9000-family controllers.
 
 	  To compile this driver as a module, choose M here.  The module
 	  will be called sfc.
 config SFC_MTD
-	bool "Solarflare Solarstorm SFC4000 flash MTD support"
+	bool "Solarflare Solarstorm SFC4000/SFC9000-family MTD support"
 	depends on SFC && MTD && !(SFC=y && MTD=m)
 	default y
 	help
-	  This exposes the on-board flash memory as an MTD device (e.g.
-          /dev/mtd1).  This makes it possible to upload new boot code
-          to the NIC.
+	  This exposes the on-board flash memory as MTD devices (e.g.
+	  /dev/mtd1).  This makes it possible to upload new firmware
+	  to the NIC.

drivers/net/sfc/Makefile

@@ -1,6 +1,7 @@
-sfc-y			+= efx.o nic.o falcon.o tx.o rx.o falcon_gmac.o \
-			   falcon_xmac.o selftest.o ethtool.o qt202x_phy.o \
-			   mdio_10g.o tenxpress.o falcon_boards.o
+sfc-y			+= efx.o nic.o falcon.o siena.o tx.o rx.o \
+			   falcon_gmac.o falcon_xmac.o mcdi_mac.o \
+			   selftest.o ethtool.o qt202x_phy.o mdio_10g.o \
+			   tenxpress.o falcon_boards.o mcdi.o mcdi_phy.o
 sfc-$(CONFIG_SFC_MTD)	+= mtd.o
 
 obj-$(CONFIG_SFC)	+= sfc.o

drivers/net/sfc/bitfield.h

@@ -37,6 +37,8 @@
 #define EFX_DWORD_2_WIDTH 32
 #define EFX_DWORD_3_LBN 96
 #define EFX_DWORD_3_WIDTH 32
+#define EFX_QWORD_0_LBN 0
+#define EFX_QWORD_0_WIDTH 64
 
 /* Specified attribute (e.g. LBN) of the specified field */
 #define EFX_VAL(field, attribute) field ## _ ## attribute

drivers/net/sfc/efx.c

@@ -25,6 +25,8 @@
 #include "mdio_10g.h"
 #include "nic.h"
 
+#include "mcdi.h"
+
 /**************************************************************************
  *
  * Type name strings
@@ -84,6 +86,7 @@ const char *efx_reset_type_names[] = {
 	[RESET_TYPE_RX_DESC_FETCH] = "RX_DESC_FETCH",
 	[RESET_TYPE_TX_DESC_FETCH] = "TX_DESC_FETCH",
 	[RESET_TYPE_TX_SKIP]       = "TX_SKIP",
+	[RESET_TYPE_MC_FAILURE]    = "MC_FAILURE",
 };
 
 #define EFX_MAX_MTU (9 * 1024)
@@ -1191,6 +1194,15 @@ static void efx_start_all(struct efx_nic *efx)
 
 	efx_nic_enable_interrupts(efx);
 
+	/* Switch to event based MCDI completions after enabling interrupts.
+	 * If a reset has been scheduled, then we need to stay in polled mode.
+	 * Rather than serialising efx_mcdi_mode_event() [which sleeps] and
+	 * reset_pending [modified from an atomic context], we instead guarantee
+	 * that efx_mcdi_mode_poll() isn't reverted erroneously */
+	efx_mcdi_mode_event(efx);
+	if (efx->reset_pending != RESET_TYPE_NONE)
+		efx_mcdi_mode_poll(efx);
+
 	/* Start the hardware monitor if there is one. Otherwise (we're link
 	 * event driven), we have to poll the PHY because after an event queue
 	 * flush, we could have a missed a link state change */
@@ -1242,6 +1254,9 @@ static void efx_stop_all(struct efx_nic *efx)
 
 	efx->type->stop_stats(efx);
 
+	/* Switch to MCDI polling on Siena before disabling interrupts */
+	efx_mcdi_mode_poll(efx);
+
 	/* Disable interrupts and wait for ISR to complete */
 	efx_nic_disable_interrupts(efx);
 	if (efx->legacy_irq)
@@ -1445,6 +1460,8 @@ static int efx_net_open(struct net_device *net_dev)
 		return -EIO;
 	if (efx->phy_mode & PHY_MODE_SPECIAL)
 		return -EBUSY;
+	if (efx_mcdi_poll_reboot(efx) && efx_reset(efx, RESET_TYPE_ALL))
+		return -EIO;
 
 	/* Notify the kernel of the link state polled during driver load,
 	 * before the monitor starts running */
@@ -1895,6 +1912,7 @@ void efx_schedule_reset(struct efx_nic *efx, enum reset_type type)
 	case RESET_TYPE_TX_SKIP:
 		method = RESET_TYPE_INVISIBLE;
 		break;
+	case RESET_TYPE_MC_FAILURE:
 	default:
 		method = RESET_TYPE_ALL;
 		break;
@@ -1908,6 +1926,10 @@ void efx_schedule_reset(struct efx_nic *efx, enum reset_type type)
 
 	efx->reset_pending = method;
 
+	/* efx_process_channel() will no longer read events once a
+	 * reset is scheduled. So switch back to poll'd MCDI completions. */
+	efx_mcdi_mode_poll(efx);
+
 	queue_work(reset_workqueue, &efx->reset_work);
 }
 
@@ -1923,6 +1945,10 @@ static struct pci_device_id efx_pci_table[] __devinitdata = {
 	 .driver_data = (unsigned long) &falcon_a1_nic_type},
 	{PCI_DEVICE(EFX_VENDID_SFC, FALCON_B_P_DEVID),
 	 .driver_data = (unsigned long) &falcon_b0_nic_type},
+	{PCI_DEVICE(EFX_VENDID_SFC, BETHPAGE_A_P_DEVID),
+	 .driver_data = (unsigned long) &siena_a0_nic_type},
+	{PCI_DEVICE(EFX_VENDID_SFC, SIENA_A_P_DEVID),
+	 .driver_data = (unsigned long) &siena_a0_nic_type},
 	{0}			/* end of list */
 };
 

drivers/net/sfc/efx.h

@@ -18,6 +18,8 @@
 #define FALCON_A_P_DEVID	0x0703
 #define FALCON_A_S_DEVID        0x6703
 #define FALCON_B_P_DEVID        0x0710
+#define BETHPAGE_A_P_DEVID      0x0803
+#define SIENA_A_P_DEVID         0x0813
 
 /* Solarstorm controllers use BAR 0 for I/O space and BAR 2(&3) for memory */
 #define EFX_MEM_BAR 2

drivers/net/sfc/enum.h

@@ -144,6 +144,7 @@ enum efx_loopback_mode {
  * @RESET_TYPE_RX_DESC_FETCH: pcie error during rx descriptor fetch
  * @RESET_TYPE_TX_DESC_FETCH: pcie error during tx descriptor fetch
  * @RESET_TYPE_TX_SKIP: hardware completed empty tx descriptors
+ * @RESET_TYPE_MC_FAILURE: MC reboot/assertion
  */
 enum reset_type {
 	RESET_TYPE_NONE = -1,
@@ -158,6 +159,7 @@ enum reset_type {
 	RESET_TYPE_RX_DESC_FETCH,
 	RESET_TYPE_TX_DESC_FETCH,
 	RESET_TYPE_TX_SKIP,
+	RESET_TYPE_MC_FAILURE,
 	RESET_TYPE_MAX,
 };
 

drivers/net/sfc/ethtool.c

@@ -236,6 +236,9 @@ static void efx_ethtool_get_drvinfo(struct net_device *net_dev,
 
 	strlcpy(info->driver, EFX_DRIVER_NAME, sizeof(info->driver));
 	strlcpy(info->version, EFX_DRIVER_VERSION, sizeof(info->version));
+	if (efx_nic_rev(efx) >= EFX_REV_SIENA_A0)
+		siena_print_fwver(efx, info->fw_version,
+				  sizeof(info->fw_version));
 	strlcpy(info->bus_info, pci_name(efx->pci_dev), sizeof(info->bus_info));
 }
 

drivers/net/sfc/mac.h

@@ -15,6 +15,9 @@
 
 extern struct efx_mac_operations falcon_gmac_operations;
 extern struct efx_mac_operations falcon_xmac_operations;
+extern struct efx_mac_operations efx_mcdi_mac_operations;
 extern void falcon_reconfigure_xmac_core(struct efx_nic *efx);
+extern int efx_mcdi_mac_stats(struct efx_nic *efx, dma_addr_t dma_addr,
+			      u32 dma_len, int enable, int clear);
 
 #endif