sfc: Move the Solarflare drivers

Moves the Solarflare drivers into drivers/net/ethernet/sfc/ and
make the necessary Kconfig and Makefile changes.

CC: Steve Hodgson <shodgson@solarflare.com>
CC: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 676 insertions, 0 deletions

diff --git a/drivers/net/ethernet/sfc/siena.c b/drivers/net/ethernet/sfc/siena.c
new file mode 100644
index 000000000000..5735e84c69de
--- /dev/null
+++ b/drivers/net/ethernet/sfc/siena.c
@@ -0,0 +1,676 @@
+/****************************************************************************
+ * Driver for Solarflare Solarstorm network controllers and boards
+ * Copyright 2005-2006 Fen Systems Ltd.
+ * Copyright 2006-2010 Solarflare Communications Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation, incorporated herein by reference.
+ */
+
+#include <linux/bitops.h>
+#include <linux/delay.h>
+#include <linux/pci.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/random.h>
+#include "net_driver.h"
+#include "bitfield.h"
+#include "efx.h"
+#include "nic.h"
+#include "mac.h"
+#include "spi.h"
+#include "regs.h"
+#include "io.h"
+#include "phy.h"
+#include "workarounds.h"
+#include "mcdi.h"
+#include "mcdi_pcol.h"
+
+/* Hardware control for SFC9000 family including SFL9021 (aka Siena). */
+
+static void siena_init_wol(struct efx_nic *efx);
+
+
+static void siena_push_irq_moderation(struct efx_channel *channel)
+{
+	efx_dword_t timer_cmd;
+
+	if (channel->irq_moderation)
+		EFX_POPULATE_DWORD_2(timer_cmd,
+				     FRF_CZ_TC_TIMER_MODE,
+				     FFE_CZ_TIMER_MODE_INT_HLDOFF,
+				     FRF_CZ_TC_TIMER_VAL,
+				     channel->irq_moderation - 1);
+	else
+		EFX_POPULATE_DWORD_2(timer_cmd,
+				     FRF_CZ_TC_TIMER_MODE,
+				     FFE_CZ_TIMER_MODE_DIS,
+				     FRF_CZ_TC_TIMER_VAL, 0);
+	efx_writed_page_locked(channel->efx, &timer_cmd, FR_BZ_TIMER_COMMAND_P0,
+			       channel->channel);
+}
+
+static void siena_push_multicast_hash(struct efx_nic *efx)
+{
+	WARN_ON(!mutex_is_locked(&efx->mac_lock));
+
+	efx_mcdi_rpc(efx, MC_CMD_SET_MCAST_HASH,
+		     efx->multicast_hash.byte, sizeof(efx->multicast_hash),
+		     NULL, 0, NULL);
+}
+
+static int siena_mdio_write(struct net_device *net_dev,
+			    int prtad, int devad, u16 addr, u16 value)
+{
+	struct efx_nic *efx = netdev_priv(net_dev);
+	uint32_t status;
+	int rc;
+
+	rc = efx_mcdi_mdio_write(efx, efx->mdio_bus, prtad, devad,
+				 addr, value, &status);
+	if (rc)
+		return rc;
+	if (status != MC_CMD_MDIO_STATUS_GOOD)
+		return -EIO;
+
+	return 0;
+}
+
+static int siena_mdio_read(struct net_device *net_dev,
+			   int prtad, int devad, u16 addr)
+{
+	struct efx_nic *efx = netdev_priv(net_dev);
+	uint16_t value;
+	uint32_t status;
+	int rc;
+
+	rc = efx_mcdi_mdio_read(efx, efx->mdio_bus, prtad, devad,
+				addr, &value, &status);
+	if (rc)
+		return rc;
+	if (status != MC_CMD_MDIO_STATUS_GOOD)
+		return -EIO;
+
+	return (int)value;
+}
+
+/* This call is responsible for hooking in the MAC and PHY operations */
+static int siena_probe_port(struct efx_nic *efx)
+{
+	int rc;
+
+	/* Hook in PHY operations table */
+	efx->phy_op = &efx_mcdi_phy_ops;
+
+	/* Set up MDIO structure for PHY */
+	efx->mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
+	efx->mdio.mdio_read = siena_mdio_read;
+	efx->mdio.mdio_write = siena_mdio_write;
+
+	/* Fill out MDIO structure, loopback modes, and initial link state */
+	rc = efx->phy_op->probe(efx);
+	if (rc != 0)
+		return rc;
+
+	/* Allocate buffer for stats */
+	rc = efx_nic_alloc_buffer(efx, &efx->stats_buffer,
+				  MC_CMD_MAC_NSTATS * sizeof(u64));
+	if (rc)
+		return rc;
+	netif_dbg(efx, probe, efx->net_dev,
+		  "stats buffer at %llx (virt %p phys %llx)\n",
+		  (u64)efx->stats_buffer.dma_addr,
+		  efx->stats_buffer.addr,
+		  (u64)virt_to_phys(efx->stats_buffer.addr));
+
+	efx_mcdi_mac_stats(efx, efx->stats_buffer.dma_addr, 0, 0, 1);
+
+	return 0;
+}
+
+static void siena_remove_port(struct efx_nic *efx)
+{
+	efx->phy_op->remove(efx);
+	efx_nic_free_buffer(efx, &efx->stats_buffer);
+}
+
+static const struct efx_nic_register_test siena_register_tests[] = {
+	{ FR_AZ_ADR_REGION,
+	  EFX_OWORD32(0x0003FFFF, 0x0003FFFF, 0x0003FFFF, 0x0003FFFF) },
+	{ FR_CZ_USR_EV_CFG,
+	  EFX_OWORD32(0x000103FF, 0x00000000, 0x00000000, 0x00000000) },
+	{ FR_AZ_RX_CFG,
+	  EFX_OWORD32(0xFFFFFFFE, 0xFFFFFFFF, 0x0003FFFF, 0x00000000) },
+	{ FR_AZ_TX_CFG,
+	  EFX_OWORD32(0x7FFF0037, 0xFFFF8000, 0xFFFFFFFF, 0x03FFFFFF) },
+	{ FR_AZ_TX_RESERVED,
+	  EFX_OWORD32(0xFFFEFE80, 0x1FFFFFFF, 0x020000FE, 0x007FFFFF) },
+	{ FR_AZ_SRM_TX_DC_CFG,
+	  EFX_OWORD32(0x001FFFFF, 0x00000000, 0x00000000, 0x00000000) },
+	{ FR_AZ_RX_DC_CFG,
+	  EFX_OWORD32(0x00000003, 0x00000000, 0x00000000, 0x00000000) },
+	{ FR_AZ_RX_DC_PF_WM,
+	  EFX_OWORD32(0x000003FF, 0x00000000, 0x00000000, 0x00000000) },
+	{ FR_BZ_DP_CTRL,
+	  EFX_OWORD32(0x00000FFF, 0x00000000, 0x00000000, 0x00000000) },
+	{ FR_BZ_RX_RSS_TKEY,
+	  EFX_OWORD32(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF) },
+	{ FR_CZ_RX_RSS_IPV6_REG1,
+	  EFX_OWORD32(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF) },
+	{ FR_CZ_RX_RSS_IPV6_REG2,
+	  EFX_OWORD32(0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF) },
+	{ FR_CZ_RX_RSS_IPV6_REG3,
+	  EFX_OWORD32(0xFFFFFFFF, 0xFFFFFFFF, 0x00000007, 0x00000000) },
+};
+
+static int siena_test_registers(struct efx_nic *efx)
+{
+	return efx_nic_test_registers(efx, siena_register_tests,
+				      ARRAY_SIZE(siena_register_tests));
+}
+
+/**************************************************************************
+ *
+ * Device reset
+ *
+ **************************************************************************
+ */
+
+static enum reset_type siena_map_reset_reason(enum reset_type reason)
+{
+	return RESET_TYPE_ALL;
+}
+
+static int siena_map_reset_flags(u32 *flags)
+{
+	enum {
+		SIENA_RESET_PORT = (ETH_RESET_DMA | ETH_RESET_FILTER |
+				    ETH_RESET_OFFLOAD | ETH_RESET_MAC |
+				    ETH_RESET_PHY),
+		SIENA_RESET_MC = (SIENA_RESET_PORT |
+				  ETH_RESET_MGMT << ETH_RESET_SHARED_SHIFT),
+	};
+
+	if ((*flags & SIENA_RESET_MC) == SIENA_RESET_MC) {
+		*flags &= ~SIENA_RESET_MC;
+		return RESET_TYPE_WORLD;
+	}
+
+	if ((*flags & SIENA_RESET_PORT) == SIENA_RESET_PORT) {
+		*flags &= ~SIENA_RESET_PORT;
+		return RESET_TYPE_ALL;
+	}
+
+	/* no invisible reset implemented */
+
+	return -EINVAL;
+}
+
+static int siena_reset_hw(struct efx_nic *efx, enum reset_type method)
+{
+	int rc;
+
+	/* Recover from a failed assertion pre-reset */
+	rc = efx_mcdi_handle_assertion(efx);
+	if (rc)
+		return rc;
+
+	if (method == RESET_TYPE_WORLD)
+		return efx_mcdi_reset_mc(efx);
+	else
+		return efx_mcdi_reset_port(efx);
+}
+
+static int siena_probe_nvconfig(struct efx_nic *efx)
+{
+	return efx_mcdi_get_board_cfg(efx, efx->net_dev->perm_addr, NULL);
+}
+
+static int siena_probe_nic(struct efx_nic *efx)
+{
+	struct siena_nic_data *nic_data;
+	bool already_attached = 0;
+	efx_oword_t reg;
+	int rc;
+
+	/* Allocate storage for hardware specific data */
+	nic_data = kzalloc(sizeof(struct siena_nic_data), GFP_KERNEL);
+	if (!nic_data)
+		return -ENOMEM;
+	efx->nic_data = nic_data;
+
+	if (efx_nic_fpga_ver(efx) != 0) {
+		netif_err(efx, probe, efx->net_dev,
+			  "Siena FPGA not supported\n");
+		rc = -ENODEV;
+		goto fail1;
+	}
+
+	efx_reado(efx, &reg, FR_AZ_CS_DEBUG);
+	efx->net_dev->dev_id = EFX_OWORD_FIELD(reg, FRF_CZ_CS_PORT_NUM) - 1;
+
+	/* Initialise MCDI */
+	nic_data->mcdi_smem = ioremap_nocache(efx->membase_phys +
+					      FR_CZ_MC_TREG_SMEM,
+					      FR_CZ_MC_TREG_SMEM_STEP *
+					      FR_CZ_MC_TREG_SMEM_ROWS);
+	if (!nic_data->mcdi_smem) {
+		netif_err(efx, probe, efx->net_dev,
+			  "could not map MCDI at %llx+%x\n",
+			  (unsigned long long)efx->membase_phys +
+			  FR_CZ_MC_TREG_SMEM,
+			  FR_CZ_MC_TREG_SMEM_STEP * FR_CZ_MC_TREG_SMEM_ROWS);
+		rc = -ENOMEM;
+		goto fail1;
+	}
+	efx_mcdi_init(efx);
+
+	/* Recover from a failed assertion before probing */
+	rc = efx_mcdi_handle_assertion(efx);
+	if (rc)
+		goto fail2;
+
+	/* Let the BMC know that the driver is now in charge of link and
+	 * filter settings. We must do this before we reset the NIC */
+	rc = efx_mcdi_drv_attach(efx, true, &already_attached);
+	if (rc) {
+		netif_err(efx, probe, efx->net_dev,
+			  "Unable to register driver with MCPU\n");
+		goto fail2;
+	}
+	if (already_attached)
+		/* Not a fatal error */
+		netif_err(efx, probe, efx->net_dev,
+			  "Host already registered with MCPU\n");
+
+	/* Now we can reset the NIC */
+	rc = siena_reset_hw(efx, RESET_TYPE_ALL);
+	if (rc) {
+		netif_err(efx, probe, efx->net_dev, "failed to reset NIC\n");
+		goto fail3;
+	}
+
+	siena_init_wol(efx);
+
+	/* Allocate memory for INT_KER */
+	rc = efx_nic_alloc_buffer(efx, &efx->irq_status, sizeof(efx_oword_t));
+	if (rc)
+		goto fail4;
+	BUG_ON(efx->irq_status.dma_addr & 0x0f);
+
+	netif_dbg(efx, probe, efx->net_dev,
+		  "INT_KER at %llx (virt %p phys %llx)\n",
+		  (unsigned long long)efx->irq_status.dma_addr,
+		  efx->irq_status.addr,
+		  (unsigned long long)virt_to_phys(efx->irq_status.addr));
+
+	/* Read in the non-volatile configuration */
+	rc = siena_probe_nvconfig(efx);
+	if (rc == -EINVAL) {
+		netif_err(efx, probe, efx->net_dev,
+			  "NVRAM is invalid therefore using defaults\n");
+		efx->phy_type = PHY_TYPE_NONE;
+		efx->mdio.prtad = MDIO_PRTAD_NONE;
+	} else if (rc) {
+		goto fail5;
+	}
+
+	return 0;
+
+fail5:
+	efx_nic_free_buffer(efx, &efx->irq_status);
+fail4:
+fail3:
+	efx_mcdi_drv_attach(efx, false, NULL);
+fail2:
+	iounmap(nic_data->mcdi_smem);
+fail1:
+	kfree(efx->nic_data);
+	return rc;
+}
+
+/* This call performs hardware-specific global initialisation, such as
+ * defining the descriptor cache sizes and number of RSS channels.
+ * It does not set up any buffers, descriptor rings or event queues.
+ */
+static int siena_init_nic(struct efx_nic *efx)
+{
+	efx_oword_t temp;
+	int rc;
+
+	/* Recover from a failed assertion post-reset */
+	rc = efx_mcdi_handle_assertion(efx);
+	if (rc)
+		return rc;
+
+	/* Squash TX of packets of 16 bytes or less */
+	efx_reado(efx, &temp, FR_AZ_TX_RESERVED);
+	EFX_SET_OWORD_FIELD(temp, FRF_BZ_TX_FLUSH_MIN_LEN_EN, 1);
+	efx_writeo(efx, &temp, FR_AZ_TX_RESERVED);
+
+	/* Do not enable TX_NO_EOP_DISC_EN, since it limits packets to 16
+	 * descriptors (which is bad).
+	 */
+	efx_reado(efx, &temp, FR_AZ_TX_CFG);
+	EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_NO_EOP_DISC_EN, 0);
+	EFX_SET_OWORD_FIELD(temp, FRF_CZ_TX_FILTER_EN_BIT, 1);
+	efx_writeo(efx, &temp, FR_AZ_TX_CFG);
+
+	efx_reado(efx, &temp, FR_AZ_RX_CFG);
+	EFX_SET_OWORD_FIELD(temp, FRF_BZ_RX_DESC_PUSH_EN, 0);
+	EFX_SET_OWORD_FIELD(temp, FRF_BZ_RX_INGR_EN, 1);
+	/* Enable hash insertion. This is broken for the 'Falcon' hash
+	 * if IPv6 hashing is also enabled, so also select Toeplitz
+	 * TCP/IPv4 and IPv4 hashes. */
+	EFX_SET_OWORD_FIELD(temp, FRF_BZ_RX_HASH_INSRT_HDR, 1);
+	EFX_SET_OWORD_FIELD(temp, FRF_BZ_RX_HASH_ALG, 1);
+	EFX_SET_OWORD_FIELD(temp, FRF_BZ_RX_IP_HASH, 1);
+	efx_writeo(efx, &temp, FR_AZ_RX_CFG);
+
+	/* Set hash key for IPv4 */
+	memcpy(&temp, efx->rx_hash_key, sizeof(temp));
+	efx_writeo(efx, &temp, FR_BZ_RX_RSS_TKEY);
+
+	/* Enable IPv6 RSS */
+	BUILD_BUG_ON(sizeof(efx->rx_hash_key) <
+		     2 * sizeof(temp) + FRF_CZ_RX_RSS_IPV6_TKEY_HI_WIDTH / 8 ||
+		     FRF_CZ_RX_RSS_IPV6_TKEY_HI_LBN != 0);
+	memcpy(&temp, efx->rx_hash_key, sizeof(temp));
+	efx_writeo(efx, &temp, FR_CZ_RX_RSS_IPV6_REG1);
+	memcpy(&temp, efx->rx_hash_key + sizeof(temp), sizeof(temp));
+	efx_writeo(efx, &temp, FR_CZ_RX_RSS_IPV6_REG2);
+	EFX_POPULATE_OWORD_2(temp, FRF_CZ_RX_RSS_IPV6_THASH_ENABLE, 1,
+			     FRF_CZ_RX_RSS_IPV6_IP_THASH_ENABLE, 1);
+	memcpy(&temp, efx->rx_hash_key + 2 * sizeof(temp),
+	       FRF_CZ_RX_RSS_IPV6_TKEY_HI_WIDTH / 8);
+	efx_writeo(efx, &temp, FR_CZ_RX_RSS_IPV6_REG3);
+
+	/* Enable event logging */
+	rc = efx_mcdi_log_ctrl(efx, true, false, 0);
+	if (rc)
+		return rc;
+
+	/* Set destination of both TX and RX Flush events */
+	EFX_POPULATE_OWORD_1(temp, FRF_BZ_FLS_EVQ_ID, 0);
+	efx_writeo(efx, &temp, FR_BZ_DP_CTRL);
+
+	EFX_POPULATE_OWORD_1(temp, FRF_CZ_USREV_DIS, 1);
+	efx_writeo(efx, &temp, FR_CZ_USR_EV_CFG);
+
+	efx_nic_init_common(efx);
+	return 0;
+}
+
+static void siena_remove_nic(struct efx_nic *efx)
+{
+	struct siena_nic_data *nic_data = efx->nic_data;
+
+	efx_nic_free_buffer(efx, &efx->irq_status);
+
+	siena_reset_hw(efx, RESET_TYPE_ALL);
+
+	/* Relinquish the device back to the BMC */
+	if (efx_nic_has_mc(efx))
+		efx_mcdi_drv_attach(efx, false, NULL);
+
+	/* Tear down the private nic state */
+	iounmap(nic_data->mcdi_smem);
+	kfree(nic_data);
+	efx->nic_data = NULL;
+}
+
+#define STATS_GENERATION_INVALID ((__force __le64)(-1))
+
+static int siena_try_update_nic_stats(struct efx_nic *efx)
+{
+	__le64 *dma_stats;
+	struct efx_mac_stats *mac_stats;
+	__le64 generation_start, generation_end;
+
+	mac_stats = &efx->mac_stats;
+	dma_stats = efx->stats_buffer.addr;
+
+	generation_end = dma_stats[MC_CMD_MAC_GENERATION_END];
+	if (generation_end == STATS_GENERATION_INVALID)
+		return 0;
+	rmb();
+
+#define MAC_STAT(M, D) \
+	mac_stats->M = le64_to_cpu(dma_stats[MC_CMD_MAC_ ## D])
+
+	MAC_STAT(tx_bytes, TX_BYTES);
+	MAC_STAT(tx_bad_bytes, TX_BAD_BYTES);
+	mac_stats->tx_good_bytes = (mac_stats->tx_bytes -
+				    mac_stats->tx_bad_bytes);
+	MAC_STAT(tx_packets, TX_PKTS);
+	MAC_STAT(tx_bad, TX_BAD_FCS_PKTS);
+	MAC_STAT(tx_pause, TX_PAUSE_PKTS);
+	MAC_STAT(tx_control, TX_CONTROL_PKTS);
+	MAC_STAT(tx_unicast, TX_UNICAST_PKTS);
+	MAC_STAT(tx_multicast, TX_MULTICAST_PKTS);
+	MAC_STAT(tx_broadcast, TX_BROADCAST_PKTS);
+	MAC_STAT(tx_lt64, TX_LT64_PKTS);
+	MAC_STAT(tx_64, TX_64_PKTS);
+	MAC_STAT(tx_65_to_127, TX_65_TO_127_PKTS);
+	MAC_STAT(tx_128_to_255, TX_128_TO_255_PKTS);
+	MAC_STAT(tx_256_to_511, TX_256_TO_511_PKTS);
+	MAC_STAT(tx_512_to_1023, TX_512_TO_1023_PKTS);
+	MAC_STAT(tx_1024_to_15xx, TX_1024_TO_15XX_PKTS);
+	MAC_STAT(tx_15xx_to_jumbo, TX_15XX_TO_JUMBO_PKTS);
+	MAC_STAT(tx_gtjumbo, TX_GTJUMBO_PKTS);
+	mac_stats->tx_collision = 0;
+	MAC_STAT(tx_single_collision, TX_SINGLE_COLLISION_PKTS);
+	MAC_STAT(tx_multiple_collision, TX_MULTIPLE_COLLISION_PKTS);
+	MAC_STAT(tx_excessive_collision, TX_EXCESSIVE_COLLISION_PKTS);
+	MAC_STAT(tx_deferred, TX_DEFERRED_PKTS);
+	MAC_STAT(tx_late_collision, TX_LATE_COLLISION_PKTS);
+	mac_stats->tx_collision = (mac_stats->tx_single_collision +
+				   mac_stats->tx_multiple_collision +
+				   mac_stats->tx_excessive_collision +
+				   mac_stats->tx_late_collision);
+	MAC_STAT(tx_excessive_deferred, TX_EXCESSIVE_DEFERRED_PKTS);
+	MAC_STAT(tx_non_tcpudp, TX_NON_TCPUDP_PKTS);
+	MAC_STAT(tx_mac_src_error, TX_MAC_SRC_ERR_PKTS);
+	MAC_STAT(tx_ip_src_error, TX_IP_SRC_ERR_PKTS);
+	MAC_STAT(rx_bytes, RX_BYTES);
+	MAC_STAT(rx_bad_bytes, RX_BAD_BYTES);
+	mac_stats->rx_good_bytes = (mac_stats->rx_bytes -
+				    mac_stats->rx_bad_bytes);
+	MAC_STAT(rx_packets, RX_PKTS);
+	MAC_STAT(rx_good, RX_GOOD_PKTS);
+	MAC_STAT(rx_bad, RX_BAD_FCS_PKTS);
+	MAC_STAT(rx_pause, RX_PAUSE_PKTS);
+	MAC_STAT(rx_control, RX_CONTROL_PKTS);
+	MAC_STAT(rx_unicast, RX_UNICAST_PKTS);
+	MAC_STAT(rx_multicast, RX_MULTICAST_PKTS);
+	MAC_STAT(rx_broadcast, RX_BROADCAST_PKTS);
+	MAC_STAT(rx_lt64, RX_UNDERSIZE_PKTS);
+	MAC_STAT(rx_64, RX_64_PKTS);
+	MAC_STAT(rx_65_to_127, RX_65_TO_127_PKTS);
+	MAC_STAT(rx_128_to_255, RX_128_TO_255_PKTS);
+	MAC_STAT(rx_256_to_511, RX_256_TO_511_PKTS);
+	MAC_STAT(rx_512_to_1023, RX_512_TO_1023_PKTS);
+	MAC_STAT(rx_1024_to_15xx, RX_1024_TO_15XX_PKTS);
+	MAC_STAT(rx_15xx_to_jumbo, RX_15XX_TO_JUMBO_PKTS);
+	MAC_STAT(rx_gtjumbo, RX_GTJUMBO_PKTS);
+	mac_stats->rx_bad_lt64 = 0;
+	mac_stats->rx_bad_64_to_15xx = 0;
+	mac_stats->rx_bad_15xx_to_jumbo = 0;
+	MAC_STAT(rx_bad_gtjumbo, RX_JABBER_PKTS);
+	MAC_STAT(rx_overflow, RX_OVERFLOW_PKTS);
+	mac_stats->rx_missed = 0;
+	MAC_STAT(rx_false_carrier, RX_FALSE_CARRIER_PKTS);
+	MAC_STAT(rx_symbol_error, RX_SYMBOL_ERROR_PKTS);
+	MAC_STAT(rx_align_error, RX_ALIGN_ERROR_PKTS);
+	MAC_STAT(rx_length_error, RX_LENGTH_ERROR_PKTS);
+	MAC_STAT(rx_internal_error, RX_INTERNAL_ERROR_PKTS);
+	mac_stats->rx_good_lt64 = 0;
+
+	efx->n_rx_nodesc_drop_cnt =
+		le64_to_cpu(dma_stats[MC_CMD_MAC_RX_NODESC_DROPS]);
+
+#undef MAC_STAT
+
+	rmb();
+	generation_start = dma_stats[MC_CMD_MAC_GENERATION_START];
+	if (generation_end != generation_start)
+		return -EAGAIN;
+
+	return 0;
+}
+
+static void siena_update_nic_stats(struct efx_nic *efx)
+{
+	int retry;
+
+	/* If we're unlucky enough to read statistics wduring the DMA, wait
+	 * up to 10ms for it to finish (typically takes <500us) */
+	for (retry = 0; retry < 100; ++retry) {
+		if (siena_try_update_nic_stats(efx) == 0)
+			return;
+		udelay(100);
+	}
+
+	/* Use the old values instead */
+}
+
+static void siena_start_nic_stats(struct efx_nic *efx)
+{
+	__le64 *dma_stats = efx->stats_buffer.addr;
+
+	dma_stats[MC_CMD_MAC_GENERATION_END] = STATS_GENERATION_INVALID;
+
+	efx_mcdi_mac_stats(efx, efx->stats_buffer.dma_addr,
+			   MC_CMD_MAC_NSTATS * sizeof(u64), 1, 0);
+}
+
+static void siena_stop_nic_stats(struct efx_nic *efx)
+{
+	efx_mcdi_mac_stats(efx, efx->stats_buffer.dma_addr, 0, 0, 0);
+}
+
+/**************************************************************************
+ *
+ * Wake on LAN
+ *
+ **************************************************************************
+ */
+
+static void siena_get_wol(struct efx_nic *efx, struct ethtool_wolinfo *wol)
+{
+	struct siena_nic_data *nic_data = efx->nic_data;
+
+	wol->supported = WAKE_MAGIC;
+	if (nic_data->wol_filter_id != -1)
+		wol->wolopts = WAKE_MAGIC;
+	else
+		wol->wolopts = 0;
+	memset(&wol->sopass, 0, sizeof(wol->sopass));
+}
+
+
+static int siena_set_wol(struct efx_nic *efx, u32 type)
+{
+	struct siena_nic_data *nic_data = efx->nic_data;
+	int rc;
+
+	if (type & ~WAKE_MAGIC)
+		return -EINVAL;
+
+	if (type & WAKE_MAGIC) {
+		if (nic_data->wol_filter_id != -1)
+			efx_mcdi_wol_filter_remove(efx,
+						   nic_data->wol_filter_id);
+		rc = efx_mcdi_wol_filter_set_magic(efx, efx->net_dev->dev_addr,
+						   &nic_data->wol_filter_id);
+		if (rc)
+			goto fail;
+
+		pci_wake_from_d3(efx->pci_dev, true);
+	} else {
+		rc = efx_mcdi_wol_filter_reset(efx);
+		nic_data->wol_filter_id = -1;
+		pci_wake_from_d3(efx->pci_dev, false);
+		if (rc)
+			goto fail;
+	}
+
+	return 0;
+ fail:
+	netif_err(efx, hw, efx->net_dev, "%s failed: type=%d rc=%d\n",
+		  __func__, type, rc);
+	return rc;
+}
+
+
+static void siena_init_wol(struct efx_nic *efx)
+{
+	struct siena_nic_data *nic_data = efx->nic_data;
+	int rc;
+
+	rc = efx_mcdi_wol_filter_get_magic(efx, &nic_data->wol_filter_id);
+
+	if (rc != 0) {
+		/* If it failed, attempt to get into a synchronised
+		 * state with MC by resetting any set WoL filters */
+		efx_mcdi_wol_filter_reset(efx);
+		nic_data->wol_filter_id = -1;
+	} else if (nic_data->wol_filter_id != -1) {
+		pci_wake_from_d3(efx->pci_dev, true);
+	}
+}
+
+
+/**************************************************************************
+ *
+ * Revision-dependent attributes used by efx.c and nic.c
+ *
+ **************************************************************************
+ */
+
+const struct efx_nic_type siena_a0_nic_type = {
+	.probe = siena_probe_nic,
+	.remove = siena_remove_nic,
+	.init = siena_init_nic,
+	.fini = efx_port_dummy_op_void,
+	.monitor = NULL,
+	.map_reset_reason = siena_map_reset_reason,
+	.map_reset_flags = siena_map_reset_flags,
+	.reset = siena_reset_hw,
+	.probe_port = siena_probe_port,
+	.remove_port = siena_remove_port,
+	.prepare_flush = efx_port_dummy_op_void,
+	.update_stats = siena_update_nic_stats,
+	.start_stats = siena_start_nic_stats,
+	.stop_stats = siena_stop_nic_stats,
+	.set_id_led = efx_mcdi_set_id_led,
+	.push_irq_moderation = siena_push_irq_moderation,
+	.push_multicast_hash = siena_push_multicast_hash,
+	.reconfigure_port = efx_mcdi_phy_reconfigure,
+	.get_wol = siena_get_wol,
+	.set_wol = siena_set_wol,
+	.resume_wol = siena_init_wol,
+	.test_registers = siena_test_registers,
+	.test_nvram = efx_mcdi_nvram_test_all,
+	.default_mac_ops = &efx_mcdi_mac_operations,
+
+	.revision = EFX_REV_SIENA_A0,
+	.mem_map_size = FR_CZ_MC_TREG_SMEM, /* MC_TREG_SMEM mapped separately */
+	.txd_ptr_tbl_base = FR_BZ_TX_DESC_PTR_TBL,
+	.rxd_ptr_tbl_base = FR_BZ_RX_DESC_PTR_TBL,
+	.buf_tbl_base = FR_BZ_BUF_FULL_TBL,
+	.evq_ptr_tbl_base = FR_BZ_EVQ_PTR_TBL,
+	.evq_rptr_tbl_base = FR_BZ_EVQ_RPTR,
+	.max_dma_mask = DMA_BIT_MASK(FSF_AZ_TX_KER_BUF_ADDR_WIDTH),
+	.rx_buffer_hash_size = 0x10,
+	.rx_buffer_padding = 0,
+	.max_interrupt_mode = EFX_INT_MODE_MSIX,
+	.phys_addr_channels = 32, /* Hardware limit is 64, but the legacy
+				   * interrupt handler only supports 32
+				   * channels */
+	.tx_dc_base = 0x88000,
+	.rx_dc_base = 0x68000,
+	.offload_features = (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
+			     NETIF_F_RXHASH | NETIF_F_NTUPLE),
+};