Adding upstream version 5.10.209.upstream/5.10.209

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 2986 insertions, 0 deletions

diff --git a/drivers/net/ethernet/sfc/farch.c b/drivers/net/ethernet/sfc/farch.c
new file mode 100644
index 000000000..49df02ece
--- /dev/null
+++ b/drivers/net/ethernet/sfc/farch.c
@@ -0,0 +1,2986 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/****************************************************************************
+ * Driver for Solarflare network controllers and boards
+ * Copyright 2005-2006 Fen Systems Ltd.
+ * Copyright 2006-2013 Solarflare Communications Inc.
+ */
+
+#include <linux/bitops.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/module.h>
+#include <linux/seq_file.h>
+#include <linux/crc32.h>
+#include "net_driver.h"
+#include "bitfield.h"
+#include "efx.h"
+#include "rx_common.h"
+#include "nic.h"
+#include "farch_regs.h"
+#include "sriov.h"
+#include "siena_sriov.h"
+#include "io.h"
+#include "workarounds.h"
+
+/* Falcon-architecture (SFC9000-family) support */
+
+/**************************************************************************
+ *
+ * Configurable values
+ *
+ **************************************************************************
+ */
+
+/* This is set to 16 for a good reason.  In summary, if larger than
+ * 16, the descriptor cache holds more than a default socket
+ * buffer's worth of packets (for UDP we can only have at most one
+ * socket buffer's worth outstanding).  This combined with the fact
+ * that we only get 1 TX event per descriptor cache means the NIC
+ * goes idle.
+ */
+#define TX_DC_ENTRIES 16
+#define TX_DC_ENTRIES_ORDER 1
+
+#define RX_DC_ENTRIES 64
+#define RX_DC_ENTRIES_ORDER 3
+
+/* If EFX_MAX_INT_ERRORS internal errors occur within
+ * EFX_INT_ERROR_EXPIRE seconds, we consider the NIC broken and
+ * disable it.
+ */
+#define EFX_INT_ERROR_EXPIRE 3600
+#define EFX_MAX_INT_ERRORS 5
+
+/* Depth of RX flush request fifo */
+#define EFX_RX_FLUSH_COUNT 4
+
+/* Driver generated events */
+#define _EFX_CHANNEL_MAGIC_TEST		0x000101
+#define _EFX_CHANNEL_MAGIC_FILL		0x000102
+#define _EFX_CHANNEL_MAGIC_RX_DRAIN	0x000103
+#define _EFX_CHANNEL_MAGIC_TX_DRAIN	0x000104
+
+#define _EFX_CHANNEL_MAGIC(_code, _data)	((_code) << 8 | (_data))
+#define _EFX_CHANNEL_MAGIC_CODE(_magic)		((_magic) >> 8)
+
+#define EFX_CHANNEL_MAGIC_TEST(_channel)				\
+	_EFX_CHANNEL_MAGIC(_EFX_CHANNEL_MAGIC_TEST, (_channel)->channel)
+#define EFX_CHANNEL_MAGIC_FILL(_rx_queue)				\
+	_EFX_CHANNEL_MAGIC(_EFX_CHANNEL_MAGIC_FILL,			\
+			   efx_rx_queue_index(_rx_queue))
+#define EFX_CHANNEL_MAGIC_RX_DRAIN(_rx_queue)				\
+	_EFX_CHANNEL_MAGIC(_EFX_CHANNEL_MAGIC_RX_DRAIN,			\
+			   efx_rx_queue_index(_rx_queue))
+#define EFX_CHANNEL_MAGIC_TX_DRAIN(_tx_queue)				\
+	_EFX_CHANNEL_MAGIC(_EFX_CHANNEL_MAGIC_TX_DRAIN,			\
+			   (_tx_queue)->queue)
+
+static void efx_farch_magic_event(struct efx_channel *channel, u32 magic);
+
+/**************************************************************************
+ *
+ * Hardware access
+ *
+ **************************************************************************/
+
+static inline void efx_write_buf_tbl(struct efx_nic *efx, efx_qword_t *value,
+				     unsigned int index)
+{
+	efx_sram_writeq(efx, efx->membase + efx->type->buf_tbl_base,
+			value, index);
+}
+
+static bool efx_masked_compare_oword(const efx_oword_t *a, const efx_oword_t *b,
+				     const efx_oword_t *mask)
+{
+	return ((a->u64[0] ^ b->u64[0]) & mask->u64[0]) ||
+		((a->u64[1] ^ b->u64[1]) & mask->u64[1]);
+}
+
+int efx_farch_test_registers(struct efx_nic *efx,
+			     const struct efx_farch_register_test *regs,
+			     size_t n_regs)
+{
+	unsigned address = 0;
+	int i, j;
+	efx_oword_t mask, imask, original, reg, buf;
+
+	for (i = 0; i < n_regs; ++i) {
+		address = regs[i].address;
+		mask = imask = regs[i].mask;
+		EFX_INVERT_OWORD(imask);
+
+		efx_reado(efx, &original, address);
+
+		/* bit sweep on and off */
+		for (j = 0; j < 128; j++) {
+			if (!EFX_EXTRACT_OWORD32(mask, j, j))
+				continue;
+
+			/* Test this testable bit can be set in isolation */
+			EFX_AND_OWORD(reg, original, mask);
+			EFX_SET_OWORD32(reg, j, j, 1);
+
+			efx_writeo(efx, &reg, address);
+			efx_reado(efx, &buf, address);
+
+			if (efx_masked_compare_oword(&reg, &buf, &mask))
+				goto fail;
+
+			/* Test this testable bit can be cleared in isolation */
+			EFX_OR_OWORD(reg, original, mask);
+			EFX_SET_OWORD32(reg, j, j, 0);
+
+			efx_writeo(efx, &reg, address);
+			efx_reado(efx, &buf, address);
+
+			if (efx_masked_compare_oword(&reg, &buf, &mask))
+				goto fail;
+		}
+
+		efx_writeo(efx, &original, address);
+	}
+
+	return 0;
+
+fail:
+	netif_err(efx, hw, efx->net_dev,
+		  "wrote "EFX_OWORD_FMT" read "EFX_OWORD_FMT
+		  " at address 0x%x mask "EFX_OWORD_FMT"\n", EFX_OWORD_VAL(reg),
+		  EFX_OWORD_VAL(buf), address, EFX_OWORD_VAL(mask));
+	return -EIO;
+}
+
+/**************************************************************************
+ *
+ * Special buffer handling
+ * Special buffers are used for event queues and the TX and RX
+ * descriptor rings.
+ *
+ *************************************************************************/
+
+/*
+ * Initialise a special buffer
+ *
+ * This will define a buffer (previously allocated via
+ * efx_alloc_special_buffer()) in the buffer table, allowing
+ * it to be used for event queues, descriptor rings etc.
+ */
+static void
+efx_init_special_buffer(struct efx_nic *efx, struct efx_special_buffer *buffer)
+{
+	efx_qword_t buf_desc;
+	unsigned int index;
+	dma_addr_t dma_addr;
+	int i;
+
+	EFX_WARN_ON_PARANOID(!buffer->buf.addr);
+
+	/* Write buffer descriptors to NIC */
+	for (i = 0; i < buffer->entries; i++) {
+		index = buffer->index + i;
+		dma_addr = buffer->buf.dma_addr + (i * EFX_BUF_SIZE);
+		netif_dbg(efx, probe, efx->net_dev,
+			  "mapping special buffer %d at %llx\n",
+			  index, (unsigned long long)dma_addr);
+		EFX_POPULATE_QWORD_3(buf_desc,
+				     FRF_AZ_BUF_ADR_REGION, 0,
+				     FRF_AZ_BUF_ADR_FBUF, dma_addr >> 12,
+				     FRF_AZ_BUF_OWNER_ID_FBUF, 0);
+		efx_write_buf_tbl(efx, &buf_desc, index);
+	}
+}
+
+/* Unmaps a buffer and clears the buffer table entries */
+static void
+efx_fini_special_buffer(struct efx_nic *efx, struct efx_special_buffer *buffer)
+{
+	efx_oword_t buf_tbl_upd;
+	unsigned int start = buffer->index;
+	unsigned int end = (buffer->index + buffer->entries - 1);
+
+	if (!buffer->entries)
+		return;
+
+	netif_dbg(efx, hw, efx->net_dev, "unmapping special buffers %d-%d\n",
+		  buffer->index, buffer->index + buffer->entries - 1);
+
+	EFX_POPULATE_OWORD_4(buf_tbl_upd,
+			     FRF_AZ_BUF_UPD_CMD, 0,
+			     FRF_AZ_BUF_CLR_CMD, 1,
+			     FRF_AZ_BUF_CLR_END_ID, end,
+			     FRF_AZ_BUF_CLR_START_ID, start);
+	efx_writeo(efx, &buf_tbl_upd, FR_AZ_BUF_TBL_UPD);
+}
+
+/*
+ * Allocate a new special buffer
+ *
+ * This allocates memory for a new buffer, clears it and allocates a
+ * new buffer ID range.  It does not write into the buffer table.
+ *
+ * This call will allocate 4KB buffers, since 8KB buffers can't be
+ * used for event queues and descriptor rings.
+ */
+static int efx_alloc_special_buffer(struct efx_nic *efx,
+				    struct efx_special_buffer *buffer,
+				    unsigned int len)
+{
+#ifdef CONFIG_SFC_SRIOV
+	struct siena_nic_data *nic_data = efx->nic_data;
+#endif
+	len = ALIGN(len, EFX_BUF_SIZE);
+
+	if (efx_nic_alloc_buffer(efx, &buffer->buf, len, GFP_KERNEL))
+		return -ENOMEM;
+	buffer->entries = len / EFX_BUF_SIZE;
+	BUG_ON(buffer->buf.dma_addr & (EFX_BUF_SIZE - 1));
+
+	/* Select new buffer ID */
+	buffer->index = efx->next_buffer_table;
+	efx->next_buffer_table += buffer->entries;
+#ifdef CONFIG_SFC_SRIOV
+	BUG_ON(efx_siena_sriov_enabled(efx) &&
+	       nic_data->vf_buftbl_base < efx->next_buffer_table);
+#endif
+
+	netif_dbg(efx, probe, efx->net_dev,
+		  "allocating special buffers %d-%d at %llx+%x "
+		  "(virt %p phys %llx)\n", buffer->index,
+		  buffer->index + buffer->entries - 1,
+		  (u64)buffer->buf.dma_addr, len,
+		  buffer->buf.addr, (u64)virt_to_phys(buffer->buf.addr));
+
+	return 0;
+}
+
+static void
+efx_free_special_buffer(struct efx_nic *efx, struct efx_special_buffer *buffer)
+{
+	if (!buffer->buf.addr)
+		return;
+
+	netif_dbg(efx, hw, efx->net_dev,
+		  "deallocating special buffers %d-%d at %llx+%x "
+		  "(virt %p phys %llx)\n", buffer->index,
+		  buffer->index + buffer->entries - 1,
+		  (u64)buffer->buf.dma_addr, buffer->buf.len,
+		  buffer->buf.addr, (u64)virt_to_phys(buffer->buf.addr));
+
+	efx_nic_free_buffer(efx, &buffer->buf);
+	buffer->entries = 0;
+}
+
+/**************************************************************************
+ *
+ * TX path
+ *
+ **************************************************************************/
+
+/* This writes to the TX_DESC_WPTR; write pointer for TX descriptor ring */
+static inline void efx_farch_notify_tx_desc(struct efx_tx_queue *tx_queue)
+{
+	unsigned write_ptr;
+	efx_dword_t reg;
+
+	write_ptr = tx_queue->write_count & tx_queue->ptr_mask;
+	EFX_POPULATE_DWORD_1(reg, FRF_AZ_TX_DESC_WPTR_DWORD, write_ptr);
+	efx_writed_page(tx_queue->efx, &reg,
+			FR_AZ_TX_DESC_UPD_DWORD_P0, tx_queue->queue);
+}
+
+/* Write pointer and first descriptor for TX descriptor ring */
+static inline void efx_farch_push_tx_desc(struct efx_tx_queue *tx_queue,
+					  const efx_qword_t *txd)
+{
+	unsigned write_ptr;
+	efx_oword_t reg;
+
+	BUILD_BUG_ON(FRF_AZ_TX_DESC_LBN != 0);
+	BUILD_BUG_ON(FR_AA_TX_DESC_UPD_KER != FR_BZ_TX_DESC_UPD_P0);
+
+	write_ptr = tx_queue->write_count & tx_queue->ptr_mask;
+	EFX_POPULATE_OWORD_2(reg, FRF_AZ_TX_DESC_PUSH_CMD, true,
+			     FRF_AZ_TX_DESC_WPTR, write_ptr);
+	reg.qword[0] = *txd;
+	efx_writeo_page(tx_queue->efx, &reg,
+			FR_BZ_TX_DESC_UPD_P0, tx_queue->queue);
+}
+
+
+/* For each entry inserted into the software descriptor ring, create a
+ * descriptor in the hardware TX descriptor ring (in host memory), and
+ * write a doorbell.
+ */
+void efx_farch_tx_write(struct efx_tx_queue *tx_queue)
+{
+	struct efx_tx_buffer *buffer;
+	efx_qword_t *txd;
+	unsigned write_ptr;
+	unsigned old_write_count = tx_queue->write_count;
+
+	tx_queue->xmit_pending = false;
+	if (unlikely(tx_queue->write_count == tx_queue->insert_count))
+		return;
+
+	do {
+		write_ptr = tx_queue->write_count & tx_queue->ptr_mask;
+		buffer = &tx_queue->buffer[write_ptr];
+		txd = efx_tx_desc(tx_queue, write_ptr);
+		++tx_queue->write_count;
+
+		EFX_WARN_ON_ONCE_PARANOID(buffer->flags & EFX_TX_BUF_OPTION);
+
+		/* Create TX descriptor ring entry */
+		BUILD_BUG_ON(EFX_TX_BUF_CONT != 1);
+		EFX_POPULATE_QWORD_4(*txd,
+				     FSF_AZ_TX_KER_CONT,
+				     buffer->flags & EFX_TX_BUF_CONT,
+				     FSF_AZ_TX_KER_BYTE_COUNT, buffer->len,
+				     FSF_AZ_TX_KER_BUF_REGION, 0,
+				     FSF_AZ_TX_KER_BUF_ADDR, buffer->dma_addr);
+	} while (tx_queue->write_count != tx_queue->insert_count);
+
+	wmb(); /* Ensure descriptors are written before they are fetched */
+
+	if (efx_nic_may_push_tx_desc(tx_queue, old_write_count)) {
+		txd = efx_tx_desc(tx_queue,
+				  old_write_count & tx_queue->ptr_mask);
+		efx_farch_push_tx_desc(tx_queue, txd);
+		++tx_queue->pushes;
+	} else {
+		efx_farch_notify_tx_desc(tx_queue);
+	}
+}
+
+unsigned int efx_farch_tx_limit_len(struct efx_tx_queue *tx_queue,
+				    dma_addr_t dma_addr, unsigned int len)
+{
+	/* Don't cross 4K boundaries with descriptors. */
+	unsigned int limit = (~dma_addr & (EFX_PAGE_SIZE - 1)) + 1;
+
+	len = min(limit, len);
+
+	return len;
+}
+
+
+/* Allocate hardware resources for a TX queue */
+int efx_farch_tx_probe(struct efx_tx_queue *tx_queue)
+{
+	struct efx_nic *efx = tx_queue->efx;
+	unsigned entries;
+
+	tx_queue->type = ((tx_queue->label & 1) ? EFX_TXQ_TYPE_OUTER_CSUM : 0) |
+			 ((tx_queue->label & 2) ? EFX_TXQ_TYPE_HIGHPRI : 0);
+	entries = tx_queue->ptr_mask + 1;
+	return efx_alloc_special_buffer(efx, &tx_queue->txd,
+					entries * sizeof(efx_qword_t));
+}
+
+void efx_farch_tx_init(struct efx_tx_queue *tx_queue)
+{
+	int csum = tx_queue->type & EFX_TXQ_TYPE_OUTER_CSUM;
+	struct efx_nic *efx = tx_queue->efx;
+	efx_oword_t reg;
+
+	/* Pin TX descriptor ring */
+	efx_init_special_buffer(efx, &tx_queue->txd);
+
+	/* Push TX descriptor ring to card */
+	EFX_POPULATE_OWORD_10(reg,
+			      FRF_AZ_TX_DESCQ_EN, 1,
+			      FRF_AZ_TX_ISCSI_DDIG_EN, 0,
+			      FRF_AZ_TX_ISCSI_HDIG_EN, 0,
+			      FRF_AZ_TX_DESCQ_BUF_BASE_ID, tx_queue->txd.index,
+			      FRF_AZ_TX_DESCQ_EVQ_ID,
+			      tx_queue->channel->channel,
+			      FRF_AZ_TX_DESCQ_OWNER_ID, 0,
+			      FRF_AZ_TX_DESCQ_LABEL, tx_queue->label,
+			      FRF_AZ_TX_DESCQ_SIZE,
+			      __ffs(tx_queue->txd.entries),
+			      FRF_AZ_TX_DESCQ_TYPE, 0,
+			      FRF_BZ_TX_NON_IP_DROP_DIS, 1);
+
+	EFX_SET_OWORD_FIELD(reg, FRF_BZ_TX_IP_CHKSM_DIS, !csum);
+	EFX_SET_OWORD_FIELD(reg, FRF_BZ_TX_TCP_CHKSM_DIS, !csum);
+
+	efx_writeo_table(efx, &reg, efx->type->txd_ptr_tbl_base,
+			 tx_queue->queue);
+
+	EFX_POPULATE_OWORD_1(reg,
+			     FRF_BZ_TX_PACE,
+			     (tx_queue->type & EFX_TXQ_TYPE_HIGHPRI) ?
+			     FFE_BZ_TX_PACE_OFF :
+			     FFE_BZ_TX_PACE_RESERVED);
+	efx_writeo_table(efx, &reg, FR_BZ_TX_PACE_TBL, tx_queue->queue);
+
+	tx_queue->tso_version = 1;
+}
+
+static void efx_farch_flush_tx_queue(struct efx_tx_queue *tx_queue)
+{
+	struct efx_nic *efx = tx_queue->efx;
+	efx_oword_t tx_flush_descq;
+
+	WARN_ON(atomic_read(&tx_queue->flush_outstanding));
+	atomic_set(&tx_queue->flush_outstanding, 1);
+
+	EFX_POPULATE_OWORD_2(tx_flush_descq,
+			     FRF_AZ_TX_FLUSH_DESCQ_CMD, 1,
+			     FRF_AZ_TX_FLUSH_DESCQ, tx_queue->queue);
+	efx_writeo(efx, &tx_flush_descq, FR_AZ_TX_FLUSH_DESCQ);
+}
+
+void efx_farch_tx_fini(struct efx_tx_queue *tx_queue)
+{
+	struct efx_nic *efx = tx_queue->efx;
+	efx_oword_t tx_desc_ptr;
+
+	/* Remove TX descriptor ring from card */
+	EFX_ZERO_OWORD(tx_desc_ptr);
+	efx_writeo_table(efx, &tx_desc_ptr, efx->type->txd_ptr_tbl_base,
+			 tx_queue->queue);
+
+	/* Unpin TX descriptor ring */
+	efx_fini_special_buffer(efx, &tx_queue->txd);
+}
+
+/* Free buffers backing TX queue */
+void efx_farch_tx_remove(struct efx_tx_queue *tx_queue)
+{
+	efx_free_special_buffer(tx_queue->efx, &tx_queue->txd);
+}
+
+/**************************************************************************
+ *
+ * RX path
+ *
+ **************************************************************************/
+
+/* This creates an entry in the RX descriptor queue */
+static inline void
+efx_farch_build_rx_desc(struct efx_rx_queue *rx_queue, unsigned index)
+{
+	struct efx_rx_buffer *rx_buf;
+	efx_qword_t *rxd;
+
+	rxd = efx_rx_desc(rx_queue, index);
+	rx_buf = efx_rx_buffer(rx_queue, index);
+	EFX_POPULATE_QWORD_3(*rxd,
+			     FSF_AZ_RX_KER_BUF_SIZE,
+			     rx_buf->len -
+			     rx_queue->efx->type->rx_buffer_padding,
+			     FSF_AZ_RX_KER_BUF_REGION, 0,
+			     FSF_AZ_RX_KER_BUF_ADDR, rx_buf->dma_addr);
+}
+
+/* This writes to the RX_DESC_WPTR register for the specified receive
+ * descriptor ring.
+ */
+void efx_farch_rx_write(struct efx_rx_queue *rx_queue)
+{
+	struct efx_nic *efx = rx_queue->efx;
+	efx_dword_t reg;
+	unsigned write_ptr;
+
+	while (rx_queue->notified_count != rx_queue->added_count) {
+		efx_farch_build_rx_desc(
+			rx_queue,
+			rx_queue->notified_count & rx_queue->ptr_mask);
+		++rx_queue->notified_count;
+	}
+
+	wmb();
+	write_ptr = rx_queue->added_count & rx_queue->ptr_mask;
+	EFX_POPULATE_DWORD_1(reg, FRF_AZ_RX_DESC_WPTR_DWORD, write_ptr);
+	efx_writed_page(efx, &reg, FR_AZ_RX_DESC_UPD_DWORD_P0,
+			efx_rx_queue_index(rx_queue));
+}
+
+int efx_farch_rx_probe(struct efx_rx_queue *rx_queue)
+{
+	struct efx_nic *efx = rx_queue->efx;
+	unsigned entries;
+
+	entries = rx_queue->ptr_mask + 1;
+	return efx_alloc_special_buffer(efx, &rx_queue->rxd,
+					entries * sizeof(efx_qword_t));
+}
+
+void efx_farch_rx_init(struct efx_rx_queue *rx_queue)
+{
+	efx_oword_t rx_desc_ptr;
+	struct efx_nic *efx = rx_queue->efx;
+	bool jumbo_en;
+
+	/* For kernel-mode queues in Siena, the JUMBO flag enables scatter. */
+	jumbo_en = efx->rx_scatter;
+
+	netif_dbg(efx, hw, efx->net_dev,
+		  "RX queue %d ring in special buffers %d-%d\n",
+		  efx_rx_queue_index(rx_queue), rx_queue->rxd.index,
+		  rx_queue->rxd.index + rx_queue->rxd.entries - 1);
+
+	rx_queue->scatter_n = 0;
+
+	/* Pin RX descriptor ring */
+	efx_init_special_buffer(efx, &rx_queue->rxd);
+
+	/* Push RX descriptor ring to card */
+	EFX_POPULATE_OWORD_10(rx_desc_ptr,
+			      FRF_AZ_RX_ISCSI_DDIG_EN, true,
+			      FRF_AZ_RX_ISCSI_HDIG_EN, true,
+			      FRF_AZ_RX_DESCQ_BUF_BASE_ID, rx_queue->rxd.index,
+			      FRF_AZ_RX_DESCQ_EVQ_ID,
+			      efx_rx_queue_channel(rx_queue)->channel,
+			      FRF_AZ_RX_DESCQ_OWNER_ID, 0,
+			      FRF_AZ_RX_DESCQ_LABEL,
+			      efx_rx_queue_index(rx_queue),
+			      FRF_AZ_RX_DESCQ_SIZE,
+			      __ffs(rx_queue->rxd.entries),
+			      FRF_AZ_RX_DESCQ_TYPE, 0 /* kernel queue */ ,
+			      FRF_AZ_RX_DESCQ_JUMBO, jumbo_en,
+			      FRF_AZ_RX_DESCQ_EN, 1);
+	efx_writeo_table(efx, &rx_desc_ptr, efx->type->rxd_ptr_tbl_base,
+			 efx_rx_queue_index(rx_queue));
+}
+
+static void efx_farch_flush_rx_queue(struct efx_rx_queue *rx_queue)
+{
+	struct efx_nic *efx = rx_queue->efx;
+	efx_oword_t rx_flush_descq;
+
+	EFX_POPULATE_OWORD_2(rx_flush_descq,
+			     FRF_AZ_RX_FLUSH_DESCQ_CMD, 1,
+			     FRF_AZ_RX_FLUSH_DESCQ,
+			     efx_rx_queue_index(rx_queue));
+	efx_writeo(efx, &rx_flush_descq, FR_AZ_RX_FLUSH_DESCQ);
+}
+
+void efx_farch_rx_fini(struct efx_rx_queue *rx_queue)
+{
+	efx_oword_t rx_desc_ptr;
+	struct efx_nic *efx = rx_queue->efx;
+
+	/* Remove RX descriptor ring from card */
+	EFX_ZERO_OWORD(rx_desc_ptr);
+	efx_writeo_table(efx, &rx_desc_ptr, efx->type->rxd_ptr_tbl_base,
+			 efx_rx_queue_index(rx_queue));
+
+	/* Unpin RX descriptor ring */
+	efx_fini_special_buffer(efx, &rx_queue->rxd);
+}
+
+/* Free buffers backing RX queue */
+void efx_farch_rx_remove(struct efx_rx_queue *rx_queue)
+{
+	efx_free_special_buffer(rx_queue->efx, &rx_queue->rxd);
+}
+
+/**************************************************************************
+ *
+ * Flush handling
+ *
+ **************************************************************************/
+
+/* efx_farch_flush_queues() must be woken up when all flushes are completed,
+ * or more RX flushes can be kicked off.
+ */
+static bool efx_farch_flush_wake(struct efx_nic *efx)
+{
+	/* Ensure that all updates are visible to efx_farch_flush_queues() */
+	smp_mb();
+
+	return (atomic_read(&efx->active_queues) == 0 ||
+		(atomic_read(&efx->rxq_flush_outstanding) < EFX_RX_FLUSH_COUNT
+		 && atomic_read(&efx->rxq_flush_pending) > 0));
+}
+
+static bool efx_check_tx_flush_complete(struct efx_nic *efx)
+{
+	bool i = true;
+	efx_oword_t txd_ptr_tbl;
+	struct efx_channel *channel;
+	struct efx_tx_queue *tx_queue;
+
+	efx_for_each_channel(channel, efx) {
+		efx_for_each_channel_tx_queue(tx_queue, channel) {
+			efx_reado_table(efx, &txd_ptr_tbl,
+					FR_BZ_TX_DESC_PTR_TBL, tx_queue->queue);
+			if (EFX_OWORD_FIELD(txd_ptr_tbl,
+					    FRF_AZ_TX_DESCQ_FLUSH) ||
+			    EFX_OWORD_FIELD(txd_ptr_tbl,
+					    FRF_AZ_TX_DESCQ_EN)) {
+				netif_dbg(efx, hw, efx->net_dev,
+					  "flush did not complete on TXQ %d\n",
+					  tx_queue->queue);
+				i = false;
+			} else if (atomic_cmpxchg(&tx_queue->flush_outstanding,
+						  1, 0)) {
+				/* The flush is complete, but we didn't
+				 * receive a flush completion event
+				 */
+				netif_dbg(efx, hw, efx->net_dev,
+					  "flush complete on TXQ %d, so drain "
+					  "the queue\n", tx_queue->queue);
+				/* Don't need to increment active_queues as it
+				 * has already been incremented for the queues
+				 * which did not drain
+				 */
+				efx_farch_magic_event(channel,
+						      EFX_CHANNEL_MAGIC_TX_DRAIN(
+							      tx_queue));
+			}
+		}
+	}
+
+	return i;
+}
+
+/* Flush all the transmit queues, and continue flushing receive queues until
+ * they're all flushed. Wait for the DRAIN events to be received so that there
+ * are no more RX and TX events left on any channel. */
+static int efx_farch_do_flush(struct efx_nic *efx)
+{
+	unsigned timeout = msecs_to_jiffies(5000); /* 5s for all flushes and drains */
+	struct efx_channel *channel;
+	struct efx_rx_queue *rx_queue;
+	struct efx_tx_queue *tx_queue;
+	int rc = 0;
+
+	efx_for_each_channel(channel, efx) {
+		efx_for_each_channel_tx_queue(tx_queue, channel) {
+			efx_farch_flush_tx_queue(tx_queue);
+		}
+		efx_for_each_channel_rx_queue(rx_queue, channel) {
+			rx_queue->flush_pending = true;
+			atomic_inc(&efx->rxq_flush_pending);
+		}
+	}
+
+	while (timeout && atomic_read(&efx->active_queues) > 0) {
+		/* If SRIOV is enabled, then offload receive queue flushing to
+		 * the firmware (though we will still have to poll for
+		 * completion). If that fails, fall back to the old scheme.
+		 */
+		if (efx_siena_sriov_enabled(efx)) {
+			rc = efx_mcdi_flush_rxqs(efx);
+			if (!rc)
+				goto wait;
+		}
+
+		/* The hardware supports four concurrent rx flushes, each of
+		 * which may need to be retried if there is an outstanding
+		 * descriptor fetch
+		 */
+		efx_for_each_channel(channel, efx) {
+			efx_for_each_channel_rx_queue(rx_queue, channel) {
+				if (atomic_read(&efx->rxq_flush_outstanding) >=
+				    EFX_RX_FLUSH_COUNT)
+					break;
+
+				if (rx_queue->flush_pending) {
+					rx_queue->flush_pending = false;
+					atomic_dec(&efx->rxq_flush_pending);
+					atomic_inc(&efx->rxq_flush_outstanding);
+					efx_farch_flush_rx_queue(rx_queue);
+				}
+			}
+		}
+
+	wait:
+		timeout = wait_event_timeout(efx->flush_wq,
+					     efx_farch_flush_wake(efx),
+					     timeout);
+	}
+
+	if (atomic_read(&efx->active_queues) &&
+	    !efx_check_tx_flush_complete(efx)) {
+		netif_err(efx, hw, efx->net_dev, "failed to flush %d queues "
+			  "(rx %d+%d)\n", atomic_read(&efx->active_queues),
+			  atomic_read(&efx->rxq_flush_outstanding),
+			  atomic_read(&efx->rxq_flush_pending));
+		rc = -ETIMEDOUT;
+
+		atomic_set(&efx->active_queues, 0);
+		atomic_set(&efx->rxq_flush_pending, 0);
+		atomic_set(&efx->rxq_flush_outstanding, 0);
+	}
+
+	return rc;
+}
+
+int efx_farch_fini_dmaq(struct efx_nic *efx)
+{
+	struct efx_channel *channel;
+	struct efx_tx_queue *tx_queue;
+	struct efx_rx_queue *rx_queue;
+	int rc = 0;
+
+	/* Do not attempt to write to the NIC during EEH recovery */
+	if (efx->state != STATE_RECOVERY) {
+		/* Only perform flush if DMA is enabled */
+		if (efx->pci_dev->is_busmaster) {
+			efx->type->prepare_flush(efx);
+			rc = efx_farch_do_flush(efx);
+			efx->type->finish_flush(efx);
+		}
+
+		efx_for_each_channel(channel, efx) {
+			efx_for_each_channel_rx_queue(rx_queue, channel)
+				efx_farch_rx_fini(rx_queue);
+			efx_for_each_channel_tx_queue(tx_queue, channel)
+				efx_farch_tx_fini(tx_queue);
+		}
+	}
+
+	return rc;
+}
+
+/* Reset queue and flush accounting after FLR
+ *
+ * One possible cause of FLR recovery is that DMA may be failing (eg. if bus
+ * mastering was disabled), in which case we don't receive (RXQ) flush
+ * completion events.  This means that efx->rxq_flush_outstanding remained at 4
+ * after the FLR; also, efx->active_queues was non-zero (as no flush completion
+ * events were received, and we didn't go through efx_check_tx_flush_complete())
+ * If we don't fix this up, on the next call to efx_realloc_channels() we won't
+ * flush any RX queues because efx->rxq_flush_outstanding is at the limit of 4
+ * for batched flush requests; and the efx->active_queues gets messed up because
+ * we keep incrementing for the newly initialised queues, but it never went to
+ * zero previously.  Then we get a timeout every time we try to restart the
+ * queues, as it doesn't go back to zero when we should be flushing the queues.
+ */
+void efx_farch_finish_flr(struct efx_nic *efx)
+{
+	atomic_set(&efx->rxq_flush_pending, 0);
+	atomic_set(&efx->rxq_flush_outstanding, 0);
+	atomic_set(&efx->active_queues, 0);
+}
+
+
+/**************************************************************************
+ *
+ * Event queue processing
+ * Event queues are processed by per-channel tasklets.
+ *
+ **************************************************************************/
+
+/* Update a channel's event queue's read pointer (RPTR) register
+ *
+ * This writes the EVQ_RPTR_REG register for the specified channel's
+ * event queue.
+ */
+void efx_farch_ev_read_ack(struct efx_channel *channel)
+{
+	efx_dword_t reg;
+	struct efx_nic *efx = channel->efx;
+
+	EFX_POPULATE_DWORD_1(reg, FRF_AZ_EVQ_RPTR,
+			     channel->eventq_read_ptr & channel->eventq_mask);
+
+	/* For Falcon A1, EVQ_RPTR_KER is documented as having a step size
+	 * of 4 bytes, but it is really 16 bytes just like later revisions.
+	 */
+	efx_writed(efx, &reg,
+		   efx->type->evq_rptr_tbl_base +
+		   FR_BZ_EVQ_RPTR_STEP * channel->channel);
+}
+
+/* Use HW to insert a SW defined event */
+void efx_farch_generate_event(struct efx_nic *efx, unsigned int evq,
+			      efx_qword_t *event)
+{
+	efx_oword_t drv_ev_reg;
+
+	BUILD_BUG_ON(FRF_AZ_DRV_EV_DATA_LBN != 0 ||
+		     FRF_AZ_DRV_EV_DATA_WIDTH != 64);
+	drv_ev_reg.u32[0] = event->u32[0];
+	drv_ev_reg.u32[1] = event->u32[1];
+	drv_ev_reg.u32[2] = 0;
+	drv_ev_reg.u32[3] = 0;
+	EFX_SET_OWORD_FIELD(drv_ev_reg, FRF_AZ_DRV_EV_QID, evq);
+	efx_writeo(efx, &drv_ev_reg, FR_AZ_DRV_EV);
+}
+
+static void efx_farch_magic_event(struct efx_channel *channel, u32 magic)
+{
+	efx_qword_t event;
+
+	EFX_POPULATE_QWORD_2(event, FSF_AZ_EV_CODE,
+			     FSE_AZ_EV_CODE_DRV_GEN_EV,
+			     FSF_AZ_DRV_GEN_EV_MAGIC, magic);
+	efx_farch_generate_event(channel->efx, channel->channel, &event);
+}
+
+/* Handle a transmit completion event
+ *
+ * The NIC batches TX completion events; the message we receive is of
+ * the form "complete all TX events up to this index".
+ */
+static void
+efx_farch_handle_tx_event(struct efx_channel *channel, efx_qword_t *event)
+{
+	unsigned int tx_ev_desc_ptr;
+	unsigned int tx_ev_q_label;
+	struct efx_tx_queue *tx_queue;
+	struct efx_nic *efx = channel->efx;
+
+	if (unlikely(READ_ONCE(efx->reset_pending)))
+		return;
+
+	if (likely(EFX_QWORD_FIELD(*event, FSF_AZ_TX_EV_COMP))) {
+		/* Transmit completion */
+		tx_ev_desc_ptr = EFX_QWORD_FIELD(*event, FSF_AZ_TX_EV_DESC_PTR);
+		tx_ev_q_label = EFX_QWORD_FIELD(*event, FSF_AZ_TX_EV_Q_LABEL);
+		tx_queue = channel->tx_queue +
+				(tx_ev_q_label % EFX_MAX_TXQ_PER_CHANNEL);
+		efx_xmit_done(tx_queue, tx_ev_desc_ptr);
+	} else if (EFX_QWORD_FIELD(*event, FSF_AZ_TX_EV_WQ_FF_FULL)) {
+		/* Rewrite the FIFO write pointer */
+		tx_ev_q_label = EFX_QWORD_FIELD(*event, FSF_AZ_TX_EV_Q_LABEL);
+		tx_queue = channel->tx_queue +
+				(tx_ev_q_label % EFX_MAX_TXQ_PER_CHANNEL);
+
+		netif_tx_lock(efx->net_dev);
+		efx_farch_notify_tx_desc(tx_queue);
+		netif_tx_unlock(efx->net_dev);
+	} else if (EFX_QWORD_FIELD(*event, FSF_AZ_TX_EV_PKT_ERR)) {
+		efx_schedule_reset(efx, RESET_TYPE_DMA_ERROR);
+	} else {
+		netif_err(efx, tx_err, efx->net_dev,
+			  "channel %d unexpected TX event "
+			  EFX_QWORD_FMT"\n", channel->channel,
+			  EFX_QWORD_VAL(*event));
+	}
+}
+
+/* Detect errors included in the rx_evt_pkt_ok bit. */
+static u16 efx_farch_handle_rx_not_ok(struct efx_rx_queue *rx_queue,
+				      const efx_qword_t *event)
+{
+	struct efx_channel *channel = efx_rx_queue_channel(rx_queue);
+	struct efx_nic *efx = rx_queue->efx;
+	bool rx_ev_buf_owner_id_err, rx_ev_ip_hdr_chksum_err;
+	bool rx_ev_tcp_udp_chksum_err, rx_ev_eth_crc_err;
+	bool rx_ev_frm_trunc, rx_ev_tobe_disc;
+	bool rx_ev_other_err, rx_ev_pause_frm;
+
+	rx_ev_tobe_disc = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_TOBE_DISC);
+	rx_ev_buf_owner_id_err = EFX_QWORD_FIELD(*event,
+						 FSF_AZ_RX_EV_BUF_OWNER_ID_ERR);
+	rx_ev_ip_hdr_chksum_err = EFX_QWORD_FIELD(*event,
+						  FSF_AZ_RX_EV_IP_HDR_CHKSUM_ERR);
+	rx_ev_tcp_udp_chksum_err = EFX_QWORD_FIELD(*event,
+						   FSF_AZ_RX_EV_TCP_UDP_CHKSUM_ERR);
+	rx_ev_eth_crc_err = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_ETH_CRC_ERR);
+	rx_ev_frm_trunc = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_FRM_TRUNC);
+	rx_ev_pause_frm = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_PAUSE_FRM_ERR);
+
+	/* Every error apart from tobe_disc and pause_frm */
+	rx_ev_other_err = (rx_ev_tcp_udp_chksum_err |
+			   rx_ev_buf_owner_id_err | rx_ev_eth_crc_err |
+			   rx_ev_frm_trunc | rx_ev_ip_hdr_chksum_err);
+
+	/* Count errors that are not in MAC stats.  Ignore expected
+	 * checksum errors during self-test. */
+	if (rx_ev_frm_trunc)
+		++channel->n_rx_frm_trunc;
+	else if (rx_ev_tobe_disc)
+		++channel->n_rx_tobe_disc;
+	else if (!efx->loopback_selftest) {
+		if (rx_ev_ip_hdr_chksum_err)
+			++channel->n_rx_ip_hdr_chksum_err;
+		else if (rx_ev_tcp_udp_chksum_err)
+			++channel->n_rx_tcp_udp_chksum_err;
+	}
+
+	/* TOBE_DISC is expected on unicast mismatches; don't print out an
+	 * error message.  FRM_TRUNC indicates RXDP dropped the packet due
+	 * to a FIFO overflow.
+	 */
+#ifdef DEBUG
+	if (rx_ev_other_err && net_ratelimit()) {
+		netif_dbg(efx, rx_err, efx->net_dev,
+			  " RX queue %d unexpected RX event "
+			  EFX_QWORD_FMT "%s%s%s%s%s%s%s\n",
+			  efx_rx_queue_index(rx_queue), EFX_QWORD_VAL(*event),
+			  rx_ev_buf_owner_id_err ? " [OWNER_ID_ERR]" : "",
+			  rx_ev_ip_hdr_chksum_err ?
+			  " [IP_HDR_CHKSUM_ERR]" : "",
+			  rx_ev_tcp_udp_chksum_err ?
+			  " [TCP_UDP_CHKSUM_ERR]" : "",
+			  rx_ev_eth_crc_err ? " [ETH_CRC_ERR]" : "",
+			  rx_ev_frm_trunc ? " [FRM_TRUNC]" : "",
+			  rx_ev_tobe_disc ? " [TOBE_DISC]" : "",
+			  rx_ev_pause_frm ? " [PAUSE]" : "");
+	}
+#else
+	(void) rx_ev_other_err;
+#endif
+
+	if (efx->net_dev->features & NETIF_F_RXALL)
+		/* don't discard frame for CRC error */
+		rx_ev_eth_crc_err = false;
+
+	/* The frame must be discarded if any of these are true. */
+	return (rx_ev_eth_crc_err | rx_ev_frm_trunc |
+		rx_ev_tobe_disc | rx_ev_pause_frm) ?
+		EFX_RX_PKT_DISCARD : 0;
+}
+
+/* Handle receive events that are not in-order. Return true if this
+ * can be handled as a partial packet discard, false if it's more
+ * serious.
+ */
+static bool
+efx_farch_handle_rx_bad_index(struct efx_rx_queue *rx_queue, unsigned index)
+{
+	struct efx_channel *channel = efx_rx_queue_channel(rx_queue);
+	struct efx_nic *efx = rx_queue->efx;
+	unsigned expected, dropped;
+
+	if (rx_queue->scatter_n &&
+	    index == ((rx_queue->removed_count + rx_queue->scatter_n - 1) &
+		      rx_queue->ptr_mask)) {
+		++channel->n_rx_nodesc_trunc;
+		return true;
+	}
+
+	expected = rx_queue->removed_count & rx_queue->ptr_mask;
+	dropped = (index - expected) & rx_queue->ptr_mask;
+	netif_info(efx, rx_err, efx->net_dev,
+		   "dropped %d events (index=%d expected=%d)\n",
+		   dropped, index, expected);
+
+	efx_schedule_reset(efx, RESET_TYPE_DISABLE);
+	return false;
+}
+
+/* Handle a packet received event
+ *
+ * The NIC gives a "discard" flag if it's a unicast packet with the
+ * wrong destination address
+ * Also "is multicast" and "matches multicast filter" flags can be used to
+ * discard non-matching multicast packets.
+ */
+static void
+efx_farch_handle_rx_event(struct efx_channel *channel, const efx_qword_t *event)
+{
+	unsigned int rx_ev_desc_ptr, rx_ev_byte_cnt;
+	unsigned int rx_ev_hdr_type, rx_ev_mcast_pkt;
+	unsigned expected_ptr;
+	bool rx_ev_pkt_ok, rx_ev_sop, rx_ev_cont;
+	u16 flags;
+	struct efx_rx_queue *rx_queue;
+	struct efx_nic *efx = channel->efx;
+
+	if (unlikely(READ_ONCE(efx->reset_pending)))
+		return;
+
+	rx_ev_cont = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_JUMBO_CONT);
+	rx_ev_sop = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_SOP);
+	WARN_ON(EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_Q_LABEL) !=
+		channel->channel);
+
+	rx_queue = efx_channel_get_rx_queue(channel);
+
+	rx_ev_desc_ptr = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_DESC_PTR);
+	expected_ptr = ((rx_queue->removed_count + rx_queue->scatter_n) &
+			rx_queue->ptr_mask);
+
+	/* Check for partial drops and other errors */
+	if (unlikely(rx_ev_desc_ptr != expected_ptr) ||
+	    unlikely(rx_ev_sop != (rx_queue->scatter_n == 0))) {
+		if (rx_ev_desc_ptr != expected_ptr &&
+		    !efx_farch_handle_rx_bad_index(rx_queue, rx_ev_desc_ptr))
+			return;
+
+		/* Discard all pending fragments */
+		if (rx_queue->scatter_n) {
+			efx_rx_packet(
+				rx_queue,
+				rx_queue->removed_count & rx_queue->ptr_mask,
+				rx_queue->scatter_n, 0, EFX_RX_PKT_DISCARD);
+			rx_queue->removed_count += rx_queue->scatter_n;
+			rx_queue->scatter_n = 0;
+		}
+
+		/* Return if there is no new fragment */
+		if (rx_ev_desc_ptr != expected_ptr)
+			return;
+
+		/* Discard new fragment if not SOP */
+		if (!rx_ev_sop) {
+			efx_rx_packet(
+				rx_queue,
+				rx_queue->removed_count & rx_queue->ptr_mask,
+				1, 0, EFX_RX_PKT_DISCARD);
+			++rx_queue->removed_count;
+			return;
+		}
+	}
+
+	++rx_queue->scatter_n;
+	if (rx_ev_cont)
+		return;
+
+	rx_ev_byte_cnt = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_BYTE_CNT);
+	rx_ev_pkt_ok = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_PKT_OK);
+	rx_ev_hdr_type = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_HDR_TYPE);
+
+	if (likely(rx_ev_pkt_ok)) {
+		/* If packet is marked as OK then we can rely on the
+		 * hardware checksum and classification.
+		 */
+		flags = 0;
+		switch (rx_ev_hdr_type) {
+		case FSE_CZ_RX_EV_HDR_TYPE_IPV4V6_TCP:
+			flags |= EFX_RX_PKT_TCP;
+			fallthrough;
+		case FSE_CZ_RX_EV_HDR_TYPE_IPV4V6_UDP:
+			flags |= EFX_RX_PKT_CSUMMED;
+			fallthrough;
+		case FSE_CZ_RX_EV_HDR_TYPE_IPV4V6_OTHER:
+		case FSE_AZ_RX_EV_HDR_TYPE_OTHER:
+			break;
+		}
+	} else {
+		flags = efx_farch_handle_rx_not_ok(rx_queue, event);
+	}
+
+	/* Detect multicast packets that didn't match the filter */
+	rx_ev_mcast_pkt = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_MCAST_PKT);
+	if (rx_ev_mcast_pkt) {
+		unsigned int rx_ev_mcast_hash_match =
+			EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_MCAST_HASH_MATCH);
+
+		if (unlikely(!rx_ev_mcast_hash_match)) {
+			++channel->n_rx_mcast_mismatch;
+			flags |= EFX_RX_PKT_DISCARD;
+		}
+	}
+
+	channel->irq_mod_score += 2;
+
+	/* Handle received packet */
+	efx_rx_packet(rx_queue,
+		      rx_queue->removed_count & rx_queue->ptr_mask,
+		      rx_queue->scatter_n, rx_ev_byte_cnt, flags);
+	rx_queue->removed_count += rx_queue->scatter_n;
+	rx_queue->scatter_n = 0;
+}
+
+/* If this flush done event corresponds to a &struct efx_tx_queue, then
+ * send an %EFX_CHANNEL_MAGIC_TX_DRAIN event to drain the event queue
+ * of all transmit completions.
+ */
+static void
+efx_farch_handle_tx_flush_done(struct efx_nic *efx, efx_qword_t *event)
+{
+	struct efx_tx_queue *tx_queue;
+	struct efx_channel *channel;
+	int qid;
+
+	qid = EFX_QWORD_FIELD(*event, FSF_AZ_DRIVER_EV_SUBDATA);
+	if (qid < EFX_MAX_TXQ_PER_CHANNEL * (efx->n_tx_channels + efx->n_extra_tx_channels)) {
+		channel = efx_get_tx_channel(efx, qid / EFX_MAX_TXQ_PER_CHANNEL);
+		tx_queue = channel->tx_queue + (qid % EFX_MAX_TXQ_PER_CHANNEL);
+		if (atomic_cmpxchg(&tx_queue->flush_outstanding, 1, 0))
+			efx_farch_magic_event(tx_queue->channel,
+					      EFX_CHANNEL_MAGIC_TX_DRAIN(tx_queue));
+	}
+}
+
+/* If this flush done event corresponds to a &struct efx_rx_queue: If the flush
+ * was successful then send an %EFX_CHANNEL_MAGIC_RX_DRAIN, otherwise add
+ * the RX queue back to the mask of RX queues in need of flushing.
+ */
+static void
+efx_farch_handle_rx_flush_done(struct efx_nic *efx, efx_qword_t *event)
+{
+	struct efx_channel *channel;
+	struct efx_rx_queue *rx_queue;
+	int qid;
+	bool failed;
+
+	qid = EFX_QWORD_FIELD(*event, FSF_AZ_DRIVER_EV_RX_DESCQ_ID);
+	failed = EFX_QWORD_FIELD(*event, FSF_AZ_DRIVER_EV_RX_FLUSH_FAIL);
+	if (qid >= efx->n_channels)
+		return;
+	channel = efx_get_channel(efx, qid);
+	if (!efx_channel_has_rx_queue(channel))
+		return;
+	rx_queue = efx_channel_get_rx_queue(channel);
+
+	if (failed) {
+		netif_info(efx, hw, efx->net_dev,
+			   "RXQ %d flush retry\n", qid);
+		rx_queue->flush_pending = true;
+		atomic_inc(&efx->rxq_flush_pending);
+	} else {
+		efx_farch_magic_event(efx_rx_queue_channel(rx_queue),
+				      EFX_CHANNEL_MAGIC_RX_DRAIN(rx_queue));
+	}
+	atomic_dec(&efx->rxq_flush_outstanding);
+	if (efx_farch_flush_wake(efx))
+		wake_up(&efx->flush_wq);
+}
+
+static void
+efx_farch_handle_drain_event(struct efx_channel *channel)
+{
+	struct efx_nic *efx = channel->efx;
+
+	WARN_ON(atomic_read(&efx->active_queues) == 0);
+	atomic_dec(&efx->active_queues);
+	if (efx_farch_flush_wake(efx))
+		wake_up(&efx->flush_wq);
+}
+
+static void efx_farch_handle_generated_event(struct efx_channel *channel,
+					     efx_qword_t *event)
+{
+	struct efx_nic *efx = channel->efx;
+	struct efx_rx_queue *rx_queue =
+		efx_channel_has_rx_queue(channel) ?
+		efx_channel_get_rx_queue(channel) : NULL;
+	unsigned magic, code;
+
+	magic = EFX_QWORD_FIELD(*event, FSF_AZ_DRV_GEN_EV_MAGIC);
+	code = _EFX_CHANNEL_MAGIC_CODE(magic);
+
+	if (magic == EFX_CHANNEL_MAGIC_TEST(channel)) {
+		channel->event_test_cpu = raw_smp_processor_id();
+	} else if (rx_queue && magic == EFX_CHANNEL_MAGIC_FILL(rx_queue)) {
+		/* The queue must be empty, so we won't receive any rx
+		 * events, so efx_process_channel() won't refill the
+		 * queue. Refill it here */
+		efx_fast_push_rx_descriptors(rx_queue, true);
+	} else if (rx_queue && magic == EFX_CHANNEL_MAGIC_RX_DRAIN(rx_queue)) {
+		efx_farch_handle_drain_event(channel);
+	} else if (code == _EFX_CHANNEL_MAGIC_TX_DRAIN) {
+		efx_farch_handle_drain_event(channel);
+	} else {
+		netif_dbg(efx, hw, efx->net_dev, "channel %d received "
+			  "generated event "EFX_QWORD_FMT"\n",
+			  channel->channel, EFX_QWORD_VAL(*event));
+	}
+}
+
+static void
+efx_farch_handle_driver_event(struct efx_channel *channel, efx_qword_t *event)
+{
+	struct efx_nic *efx = channel->efx;
+	unsigned int ev_sub_code;
+	unsigned int ev_sub_data;
+
+	ev_sub_code = EFX_QWORD_FIELD(*event, FSF_AZ_DRIVER_EV_SUBCODE);
+	ev_sub_data = EFX_QWORD_FIELD(*event, FSF_AZ_DRIVER_EV_SUBDATA);
+
+	switch (ev_sub_code) {
+	case FSE_AZ_TX_DESCQ_FLS_DONE_EV:
+		netif_vdbg(efx, hw, efx->net_dev, "channel %d TXQ %d flushed\n",
+			   channel->channel, ev_sub_data);
+		efx_farch_handle_tx_flush_done(efx, event);
+#ifdef CONFIG_SFC_SRIOV
+		efx_siena_sriov_tx_flush_done(efx, event);
+#endif
+		break;
+	case FSE_AZ_RX_DESCQ_FLS_DONE_EV:
+		netif_vdbg(efx, hw, efx->net_dev, "channel %d RXQ %d flushed\n",
+			   channel->channel, ev_sub_data);
+		efx_farch_handle_rx_flush_done(efx, event);
+#ifdef CONFIG_SFC_SRIOV
+		efx_siena_sriov_rx_flush_done(efx, event);
+#endif
+		break;
+	case FSE_AZ_EVQ_INIT_DONE_EV:
+		netif_dbg(efx, hw, efx->net_dev,
+			  "channel %d EVQ %d initialised\n",
+			  channel->channel, ev_sub_data);
+		break;
+	case FSE_AZ_SRM_UPD_DONE_EV:
+		netif_vdbg(efx, hw, efx->net_dev,
+			   "channel %d SRAM update done\n", channel->channel);
+		break;
+	case FSE_AZ_WAKE_UP_EV:
+		netif_vdbg(efx, hw, efx->net_dev,
+			   "channel %d RXQ %d wakeup event\n",
+			   channel->channel, ev_sub_data);
+		break;
+	case FSE_AZ_TIMER_EV:
+		netif_vdbg(efx, hw, efx->net_dev,
+			   "channel %d RX queue %d timer expired\n",
+			   channel->channel, ev_sub_data);
+		break;
+	case FSE_AA_RX_RECOVER_EV:
+		netif_err(efx, rx_err, efx->net_dev,
+			  "channel %d seen DRIVER RX_RESET event. "
+			"Resetting.\n", channel->channel);
+		atomic_inc(&efx->rx_reset);
+		efx_schedule_reset(efx, RESET_TYPE_DISABLE);
+		break;
+	case FSE_BZ_RX_DSC_ERROR_EV:
+		if (ev_sub_data < EFX_VI_BASE) {
+			netif_err(efx, rx_err, efx->net_dev,
+				  "RX DMA Q %d reports descriptor fetch error."
+				  " RX Q %d is disabled.\n", ev_sub_data,
+				  ev_sub_data);
+			efx_schedule_reset(efx, RESET_TYPE_DMA_ERROR);
+		}
+#ifdef CONFIG_SFC_SRIOV
+		else
+			efx_siena_sriov_desc_fetch_err(efx, ev_sub_data);
+#endif
+		break;
+	case FSE_BZ_TX_DSC_ERROR_EV:
+		if (ev_sub_data < EFX_VI_BASE) {
+			netif_err(efx, tx_err, efx->net_dev,
+				  "TX DMA Q %d reports descriptor fetch error."
+				  " TX Q %d is disabled.\n", ev_sub_data,
+				  ev_sub_data);
+			efx_schedule_reset(efx, RESET_TYPE_DMA_ERROR);
+		}
+#ifdef CONFIG_SFC_SRIOV
+		else
+			efx_siena_sriov_desc_fetch_err(efx, ev_sub_data);
+#endif
+		break;
+	default:
+		netif_vdbg(efx, hw, efx->net_dev,
+			   "channel %d unknown driver event code %d "
+			   "data %04x\n", channel->channel, ev_sub_code,
+			   ev_sub_data);
+		break;
+	}
+}
+
+int efx_farch_ev_process(struct efx_channel *channel, int budget)
+{
+	struct efx_nic *efx = channel->efx;
+	unsigned int read_ptr;
+	efx_qword_t event, *p_event;
+	int ev_code;
+	int spent = 0;
+
+	if (budget <= 0)
+		return spent;
+
+	read_ptr = channel->eventq_read_ptr;
+
+	for (;;) {
+		p_event = efx_event(channel, read_ptr);
+		event = *p_event;
+
+		if (!efx_event_present(&event))
+			/* End of events */
+			break;
+
+		netif_vdbg(channel->efx, intr, channel->efx->net_dev,
+			   "channel %d event is "EFX_QWORD_FMT"\n",
+			   channel->channel, EFX_QWORD_VAL(event));
+
+		/* Clear this event by marking it all ones */
+		EFX_SET_QWORD(*p_event);
+
+		++read_ptr;
+
+		ev_code = EFX_QWORD_FIELD(event, FSF_AZ_EV_CODE);
+
+		switch (ev_code) {
+		case FSE_AZ_EV_CODE_RX_EV:
+			efx_farch_handle_rx_event(channel, &event);
+			if (++spent == budget)
+				goto out;
+			break;
+		case FSE_AZ_EV_CODE_TX_EV:
+			efx_farch_handle_tx_event(channel, &event);
+			break;
+		case FSE_AZ_EV_CODE_DRV_GEN_EV:
+			efx_farch_handle_generated_event(channel, &event);
+			break;
+		case FSE_AZ_EV_CODE_DRIVER_EV:
+			efx_farch_handle_driver_event(channel, &event);
+			break;
+#ifdef CONFIG_SFC_SRIOV
+		case FSE_CZ_EV_CODE_USER_EV:
+			efx_siena_sriov_event(channel, &event);
+			break;
+#endif
+		case FSE_CZ_EV_CODE_MCDI_EV:
+			efx_mcdi_process_event(channel, &event);
+			break;
+		case FSE_AZ_EV_CODE_GLOBAL_EV:
+			if (efx->type->handle_global_event &&
+			    efx->type->handle_global_event(channel, &event))
+				break;
+			fallthrough;
+		default:
+			netif_err(channel->efx, hw, channel->efx->net_dev,
+				  "channel %d unknown event type %d (data "
+				  EFX_QWORD_FMT ")\n", channel->channel,
+				  ev_code, EFX_QWORD_VAL(event));
+		}
+	}
+
+out:
+	channel->eventq_read_ptr = read_ptr;
+	return spent;
+}
+
+/* Allocate buffer table entries for event queue */
+int efx_farch_ev_probe(struct efx_channel *channel)
+{
+	struct efx_nic *efx = channel->efx;
+	unsigned entries;
+
+	entries = channel->eventq_mask + 1;
+	return efx_alloc_special_buffer(efx, &channel->eventq,
+					entries * sizeof(efx_qword_t));
+}
+
+int efx_farch_ev_init(struct efx_channel *channel)
+{
+	efx_oword_t reg;
+	struct efx_nic *efx = channel->efx;
+
+	netif_dbg(efx, hw, efx->net_dev,
+		  "channel %d event queue in special buffers %d-%d\n",
+		  channel->channel, channel->eventq.index,
+		  channel->eventq.index + channel->eventq.entries - 1);
+
+	EFX_POPULATE_OWORD_3(reg,
+			     FRF_CZ_TIMER_Q_EN, 1,
+			     FRF_CZ_HOST_NOTIFY_MODE, 0,
+			     FRF_CZ_TIMER_MODE, FFE_CZ_TIMER_MODE_DIS);
+	efx_writeo_table(efx, &reg, FR_BZ_TIMER_TBL, channel->channel);
+
+	/* Pin event queue buffer */
+	efx_init_special_buffer(efx, &channel->eventq);
+
+	/* Fill event queue with all ones (i.e. empty events) */
+	memset(channel->eventq.buf.addr, 0xff, channel->eventq.buf.len);
+
+	/* Push event queue to card */
+	EFX_POPULATE_OWORD_3(reg,
+			     FRF_AZ_EVQ_EN, 1,
+			     FRF_AZ_EVQ_SIZE, __ffs(channel->eventq.entries),
+			     FRF_AZ_EVQ_BUF_BASE_ID, channel->eventq.index);
+	efx_writeo_table(efx, &reg, efx->type->evq_ptr_tbl_base,
+			 channel->channel);
+
+	return 0;
+}
+
+void efx_farch_ev_fini(struct efx_channel *channel)
+{
+	efx_oword_t reg;
+	struct efx_nic *efx = channel->efx;
+
+	/* Remove event queue from card */
+	EFX_ZERO_OWORD(reg);
+	efx_writeo_table(efx, &reg, efx->type->evq_ptr_tbl_base,
+			 channel->channel);
+	efx_writeo_table(efx, &reg, FR_BZ_TIMER_TBL, channel->channel);
+
+	/* Unpin event queue */
+	efx_fini_special_buffer(efx, &channel->eventq);
+}
+
+/* Free buffers backing event queue */
+void efx_farch_ev_remove(struct efx_channel *channel)
+{
+	efx_free_special_buffer(channel->efx, &channel->eventq);
+}
+
+
+void efx_farch_ev_test_generate(struct efx_channel *channel)
+{
+	efx_farch_magic_event(channel, EFX_CHANNEL_MAGIC_TEST(channel));
+}
+
+void efx_farch_rx_defer_refill(struct efx_rx_queue *rx_queue)
+{
+	efx_farch_magic_event(efx_rx_queue_channel(rx_queue),
+			      EFX_CHANNEL_MAGIC_FILL(rx_queue));
+}
+
+/**************************************************************************
+ *
+ * Hardware interrupts
+ * The hardware interrupt handler does very little work; all the event
+ * queue processing is carried out by per-channel tasklets.
+ *
+ **************************************************************************/
+
+/* Enable/disable/generate interrupts */
+static inline void efx_farch_interrupts(struct efx_nic *efx,
+				      bool enabled, bool force)
+{
+	efx_oword_t int_en_reg_ker;
+
+	EFX_POPULATE_OWORD_3(int_en_reg_ker,
+			     FRF_AZ_KER_INT_LEVE_SEL, efx->irq_level,
+			     FRF_AZ_KER_INT_KER, force,
+			     FRF_AZ_DRV_INT_EN_KER, enabled);
+	efx_writeo(efx, &int_en_reg_ker, FR_AZ_INT_EN_KER);
+}
+
+void efx_farch_irq_enable_master(struct efx_nic *efx)
+{
+	EFX_ZERO_OWORD(*((efx_oword_t *) efx->irq_status.addr));
+	wmb(); /* Ensure interrupt vector is clear before interrupts enabled */
+
+	efx_farch_interrupts(efx, true, false);
+}
+
+void efx_farch_irq_disable_master(struct efx_nic *efx)
+{
+	/* Disable interrupts */
+	efx_farch_interrupts(efx, false, false);
+}
+
+/* Generate a test interrupt
+ * Interrupt must already have been enabled, otherwise nasty things
+ * may happen.
+ */
+int efx_farch_irq_test_generate(struct efx_nic *efx)
+{
+	efx_farch_interrupts(efx, true, true);
+	return 0;
+}
+
+/* Process a fatal interrupt
+ * Disable bus mastering ASAP and schedule a reset
+ */
+irqreturn_t efx_farch_fatal_interrupt(struct efx_nic *efx)
+{
+	efx_oword_t *int_ker = efx->irq_status.addr;
+	efx_oword_t fatal_intr;
+	int error, mem_perr;
+
+	efx_reado(efx, &fatal_intr, FR_AZ_FATAL_INTR_KER);
+	error = EFX_OWORD_FIELD(fatal_intr, FRF_AZ_FATAL_INTR);
+
+	netif_err(efx, hw, efx->net_dev, "SYSTEM ERROR "EFX_OWORD_FMT" status "
+		  EFX_OWORD_FMT ": %s\n", EFX_OWORD_VAL(*int_ker),
+		  EFX_OWORD_VAL(fatal_intr),
+		  error ? "disabling bus mastering" : "no recognised error");
+
+	/* If this is a memory parity error dump which blocks are offending */
+	mem_perr = (EFX_OWORD_FIELD(fatal_intr, FRF_AZ_MEM_PERR_INT_KER) ||
+		    EFX_OWORD_FIELD(fatal_intr, FRF_AZ_SRM_PERR_INT_KER));
+	if (mem_perr) {
+		efx_oword_t reg;
+		efx_reado(efx, &reg, FR_AZ_MEM_STAT);
+		netif_err(efx, hw, efx->net_dev,
+			  "SYSTEM ERROR: memory parity error "EFX_OWORD_FMT"\n",
+			  EFX_OWORD_VAL(reg));
+	}
+
+	/* Disable both devices */
+	pci_clear_master(efx->pci_dev);
+	efx_farch_irq_disable_master(efx);
+
+	/* Count errors and reset or disable the NIC accordingly */
+	if (efx->int_error_count == 0 ||
+	    time_after(jiffies, efx->int_error_expire)) {
+		efx->int_error_count = 0;
+		efx->int_error_expire =
+			jiffies + EFX_INT_ERROR_EXPIRE * HZ;
+	}
+	if (++efx->int_error_count < EFX_MAX_INT_ERRORS) {
+		netif_err(efx, hw, efx->net_dev,
+			  "SYSTEM ERROR - reset scheduled\n");
+		efx_schedule_reset(efx, RESET_TYPE_INT_ERROR);
+	} else {
+		netif_err(efx, hw, efx->net_dev,
+			  "SYSTEM ERROR - max number of errors seen."
+			  "NIC will be disabled\n");
+		efx_schedule_reset(efx, RESET_TYPE_DISABLE);
+	}
+
+	return IRQ_HANDLED;
+}
+
+/* Handle a legacy interrupt
+ * Acknowledges the interrupt and schedule event queue processing.
+ */
+irqreturn_t efx_farch_legacy_interrupt(int irq, void *dev_id)
+{
+	struct efx_nic *efx = dev_id;
+	bool soft_enabled = READ_ONCE(efx->irq_soft_enabled);
+	efx_oword_t *int_ker = efx->irq_status.addr;
+	irqreturn_t result = IRQ_NONE;
+	struct efx_channel *channel;
+	efx_dword_t reg;
+	u32 queues;
+	int syserr;
+
+	/* Read the ISR which also ACKs the interrupts */
+	efx_readd(efx, &reg, FR_BZ_INT_ISR0);
+	queues = EFX_EXTRACT_DWORD(reg, 0, 31);
+
+	/* Legacy interrupts are disabled too late by the EEH kernel
+	 * code. Disable them earlier.
+	 * If an EEH error occurred, the read will have returned all ones.
+	 */
+	if (EFX_DWORD_IS_ALL_ONES(reg) && efx_try_recovery(efx) &&
+	    !efx->eeh_disabled_legacy_irq) {
+		disable_irq_nosync(efx->legacy_irq);
+		efx->eeh_disabled_legacy_irq = true;
+	}
+
+	/* Handle non-event-queue sources */
+	if (queues & (1U << efx->irq_level) && soft_enabled) {
+		syserr = EFX_OWORD_FIELD(*int_ker, FSF_AZ_NET_IVEC_FATAL_INT);
+		if (unlikely(syserr))
+			return efx_farch_fatal_interrupt(efx);
+		efx->last_irq_cpu = raw_smp_processor_id();
+	}
+
+	if (queues != 0) {
+		efx->irq_zero_count = 0;
+
+		/* Schedule processing of any interrupting queues */
+		if (likely(soft_enabled)) {
+			efx_for_each_channel(channel, efx) {
+				if (queues & 1)
+					efx_schedule_channel_irq(channel);
+				queues >>= 1;
+			}
+		}
+		result = IRQ_HANDLED;
+
+	} else {
+		efx_qword_t *event;
+
+		/* Legacy ISR read can return zero once (SF bug 15783) */
+
+		/* We can't return IRQ_HANDLED more than once on seeing ISR=0
+		 * because this might be a shared interrupt. */
+		if (efx->irq_zero_count++ == 0)
+			result = IRQ_HANDLED;
+
+		/* Ensure we schedule or rearm all event queues */
+		if (likely(soft_enabled)) {
+			efx_for_each_channel(channel, efx) {
+				event = efx_event(channel,
+						  channel->eventq_read_ptr);
+				if (efx_event_present(event))
+					efx_schedule_channel_irq(channel);
+				else
+					efx_farch_ev_read_ack(channel);
+			}
+		}
+	}
+
+	if (result == IRQ_HANDLED)
+		netif_vdbg(efx, intr, efx->net_dev,
+			   "IRQ %d on CPU %d status " EFX_DWORD_FMT "\n",
+			   irq, raw_smp_processor_id(), EFX_DWORD_VAL(reg));
+
+	return result;
+}
+
+/* Handle an MSI interrupt
+ *
+ * Handle an MSI hardware interrupt.  This routine schedules event
+ * queue processing.  No interrupt acknowledgement cycle is necessary.
+ * Also, we never need to check that the interrupt is for us, since
+ * MSI interrupts cannot be shared.
+ */
+irqreturn_t efx_farch_msi_interrupt(int irq, void *dev_id)
+{
+	struct efx_msi_context *context = dev_id;
+	struct efx_nic *efx = context->efx;
+	efx_oword_t *int_ker = efx->irq_status.addr;
+	int syserr;
+
+	netif_vdbg(efx, intr, efx->net_dev,
+		   "IRQ %d on CPU %d status " EFX_OWORD_FMT "\n",
+		   irq, raw_smp_processor_id(), EFX_OWORD_VAL(*int_ker));
+
+	if (!likely(READ_ONCE(efx->irq_soft_enabled)))
+		return IRQ_HANDLED;
+
+	/* Handle non-event-queue sources */
+	if (context->index == efx->irq_level) {
+		syserr = EFX_OWORD_FIELD(*int_ker, FSF_AZ_NET_IVEC_FATAL_INT);
+		if (unlikely(syserr))
+			return efx_farch_fatal_interrupt(efx);
+		efx->last_irq_cpu = raw_smp_processor_id();
+	}
+
+	/* Schedule processing of the channel */
+	efx_schedule_channel_irq(efx->channel[context->index]);
+
+	return IRQ_HANDLED;
+}
+
+/* Setup RSS indirection table.
+ * This maps from the hash value of the packet to RXQ
+ */
+void efx_farch_rx_push_indir_table(struct efx_nic *efx)
+{
+	size_t i = 0;
+	efx_dword_t dword;
+
+	BUILD_BUG_ON(ARRAY_SIZE(efx->rss_context.rx_indir_table) !=
+		     FR_BZ_RX_INDIRECTION_TBL_ROWS);
+
+	for (i = 0; i < FR_BZ_RX_INDIRECTION_TBL_ROWS; i++) {
+		EFX_POPULATE_DWORD_1(dword, FRF_BZ_IT_QUEUE,
+				     efx->rss_context.rx_indir_table[i]);
+		efx_writed(efx, &dword,
+			   FR_BZ_RX_INDIRECTION_TBL +
+			   FR_BZ_RX_INDIRECTION_TBL_STEP * i);
+	}
+}
+
+void efx_farch_rx_pull_indir_table(struct efx_nic *efx)
+{
+	size_t i = 0;
+	efx_dword_t dword;
+
+	BUILD_BUG_ON(ARRAY_SIZE(efx->rss_context.rx_indir_table) !=
+		     FR_BZ_RX_INDIRECTION_TBL_ROWS);
+
+	for (i = 0; i < FR_BZ_RX_INDIRECTION_TBL_ROWS; i++) {
+		efx_readd(efx, &dword,
+			   FR_BZ_RX_INDIRECTION_TBL +
+			   FR_BZ_RX_INDIRECTION_TBL_STEP * i);
+		efx->rss_context.rx_indir_table[i] = EFX_DWORD_FIELD(dword, FRF_BZ_IT_QUEUE);
+	}
+}
+
+/* Looks at available SRAM resources and works out how many queues we
+ * can support, and where things like descriptor caches should live.
+ *
+ * SRAM is split up as follows:
+ * 0                          buftbl entries for channels
+ * efx->vf_buftbl_base        buftbl entries for SR-IOV
+ * efx->rx_dc_base            RX descriptor caches
+ * efx->tx_dc_base            TX descriptor caches
+ */
+void efx_farch_dimension_resources(struct efx_nic *efx, unsigned sram_lim_qw)
+{
+	unsigned vi_count, buftbl_min, total_tx_channels;
+
+#ifdef CONFIG_SFC_SRIOV
+	struct siena_nic_data *nic_data = efx->nic_data;
+#endif
+
+	total_tx_channels = efx->n_tx_channels + efx->n_extra_tx_channels;
+	/* Account for the buffer table entries backing the datapath channels
+	 * and the descriptor caches for those channels.
+	 */
+	buftbl_min = ((efx->n_rx_channels * EFX_MAX_DMAQ_SIZE +
+		       total_tx_channels * EFX_MAX_TXQ_PER_CHANNEL * EFX_MAX_DMAQ_SIZE +
+		       efx->n_channels * EFX_MAX_EVQ_SIZE)
+		      * sizeof(efx_qword_t) / EFX_BUF_SIZE);
+	vi_count = max(efx->n_channels, total_tx_channels * EFX_MAX_TXQ_PER_CHANNEL);
+
+#ifdef CONFIG_SFC_SRIOV
+	if (efx->type->sriov_wanted) {
+		if (efx->type->sriov_wanted(efx)) {
+			unsigned vi_dc_entries, buftbl_free;
+			unsigned entries_per_vf, vf_limit;
+
+			nic_data->vf_buftbl_base = buftbl_min;
+
+			vi_dc_entries = RX_DC_ENTRIES + TX_DC_ENTRIES;
+			vi_count = max(vi_count, EFX_VI_BASE);
+			buftbl_free = (sram_lim_qw - buftbl_min -
+				       vi_count * vi_dc_entries);
+
+			entries_per_vf = ((vi_dc_entries +
+					   EFX_VF_BUFTBL_PER_VI) *
+					  efx_vf_size(efx));
+			vf_limit = min(buftbl_free / entries_per_vf,
+				       (1024U - EFX_VI_BASE) >> efx->vi_scale);
+
+			if (efx->vf_count > vf_limit) {
+				netif_err(efx, probe, efx->net_dev,
+					  "Reducing VF count from from %d to %d\n",
+					  efx->vf_count, vf_limit);
+				efx->vf_count = vf_limit;
+			}
+			vi_count += efx->vf_count * efx_vf_size(efx);
+		}
+	}
+#endif
+
+	efx->tx_dc_base = sram_lim_qw - vi_count * TX_DC_ENTRIES;
+	efx->rx_dc_base = efx->tx_dc_base - vi_count * RX_DC_ENTRIES;
+}
+
+u32 efx_farch_fpga_ver(struct efx_nic *efx)
+{
+	efx_oword_t altera_build;
+	efx_reado(efx, &altera_build, FR_AZ_ALTERA_BUILD);
+	return EFX_OWORD_FIELD(altera_build, FRF_AZ_ALTERA_BUILD_VER);
+}
+
+void efx_farch_init_common(struct efx_nic *efx)
+{
+	efx_oword_t temp;
+
+	/* Set positions of descriptor caches in SRAM. */
+	EFX_POPULATE_OWORD_1(temp, FRF_AZ_SRM_TX_DC_BASE_ADR, efx->tx_dc_base);
+	efx_writeo(efx, &temp, FR_AZ_SRM_TX_DC_CFG);
+	EFX_POPULATE_OWORD_1(temp, FRF_AZ_SRM_RX_DC_BASE_ADR, efx->rx_dc_base);
+	efx_writeo(efx, &temp, FR_AZ_SRM_RX_DC_CFG);
+
+	/* Set TX descriptor cache size. */
+	BUILD_BUG_ON(TX_DC_ENTRIES != (8 << TX_DC_ENTRIES_ORDER));
+	EFX_POPULATE_OWORD_1(temp, FRF_AZ_TX_DC_SIZE, TX_DC_ENTRIES_ORDER);
+	efx_writeo(efx, &temp, FR_AZ_TX_DC_CFG);
+
+	/* Set RX descriptor cache size.  Set low watermark to size-8, as
+	 * this allows most efficient prefetching.
+	 */
+	BUILD_BUG_ON(RX_DC_ENTRIES != (8 << RX_DC_ENTRIES_ORDER));
+	EFX_POPULATE_OWORD_1(temp, FRF_AZ_RX_DC_SIZE, RX_DC_ENTRIES_ORDER);
+	efx_writeo(efx, &temp, FR_AZ_RX_DC_CFG);
+	EFX_POPULATE_OWORD_1(temp, FRF_AZ_RX_DC_PF_LWM, RX_DC_ENTRIES - 8);
+	efx_writeo(efx, &temp, FR_AZ_RX_DC_PF_WM);
+
+	/* Program INT_KER address */
+	EFX_POPULATE_OWORD_2(temp,
+			     FRF_AZ_NORM_INT_VEC_DIS_KER,
+			     EFX_INT_MODE_USE_MSI(efx),
+			     FRF_AZ_INT_ADR_KER, efx->irq_status.dma_addr);
+	efx_writeo(efx, &temp, FR_AZ_INT_ADR_KER);
+
+	if (EFX_WORKAROUND_17213(efx) && !EFX_INT_MODE_USE_MSI(efx))
+		/* Use an interrupt level unused by event queues */
+		efx->irq_level = 0x1f;
+	else
+		/* Use a valid MSI-X vector */
+		efx->irq_level = 0;
+
+	/* Enable all the genuinely fatal interrupts.  (They are still
+	 * masked by the overall interrupt mask, controlled by
+	 * falcon_interrupts()).
+	 *
+	 * Note: All other fatal interrupts are enabled
+	 */
+	EFX_POPULATE_OWORD_3(temp,
+			     FRF_AZ_ILL_ADR_INT_KER_EN, 1,
+			     FRF_AZ_RBUF_OWN_INT_KER_EN, 1,
+			     FRF_AZ_TBUF_OWN_INT_KER_EN, 1);
+	EFX_SET_OWORD_FIELD(temp, FRF_CZ_SRAM_PERR_INT_P_KER_EN, 1);
+	EFX_INVERT_OWORD(temp);
+	efx_writeo(efx, &temp, FR_AZ_FATAL_INTR_KER);
+
+	/* Disable the ugly timer-based TX DMA backoff and allow TX DMA to be
+	 * controlled by the RX FIFO fill level. Set arbitration to one pkt/Q.
+	 */
+	efx_reado(efx, &temp, FR_AZ_TX_RESERVED);
+	EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_RX_SPACER, 0xfe);
+	EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_RX_SPACER_EN, 1);
+	EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_ONE_PKT_PER_Q, 1);
+	EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_PUSH_EN, 1);
+	EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_DIS_NON_IP_EV, 1);
+	/* Enable SW_EV to inherit in char driver - assume harmless here */
+	EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_SOFT_EVT_EN, 1);
+	/* Prefetch threshold 2 => fetch when descriptor cache half empty */
+	EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_PREF_THRESHOLD, 2);
+	/* Disable hardware watchdog which can misfire */
+	EFX_SET_OWORD_FIELD(temp, FRF_AZ_TX_PREF_WD_TMR, 0x3fffff);
+	/* Squash TX of packets of 16 bytes or less */
+	EFX_SET_OWORD_FIELD(temp, FRF_BZ_TX_FLUSH_MIN_LEN_EN, 1);
+	efx_writeo(efx, &temp, FR_AZ_TX_RESERVED);
+
+	EFX_POPULATE_OWORD_4(temp,
+			     /* Default values */
+			     FRF_BZ_TX_PACE_SB_NOT_AF, 0x15,
+			     FRF_BZ_TX_PACE_SB_AF, 0xb,
+			     FRF_BZ_TX_PACE_FB_BASE, 0,
+			     /* Allow large pace values in the fast bin. */
+			     FRF_BZ_TX_PACE_BIN_TH,
+			     FFE_BZ_TX_PACE_RESERVED);
+	efx_writeo(efx, &temp, FR_BZ_TX_PACE);
+}
+
+/**************************************************************************
+ *
+ * Filter tables
+ *
+ **************************************************************************
+ */
+
+/* "Fudge factors" - difference between programmed value and actual depth.
+ * Due to pipelined implementation we need to program H/W with a value that
+ * is larger than the hop limit we want.
+ */
+#define EFX_FARCH_FILTER_CTL_SRCH_FUDGE_WILD 3
+#define EFX_FARCH_FILTER_CTL_SRCH_FUDGE_FULL 1
+
+/* Hard maximum search limit.  Hardware will time-out beyond 200-something.
+ * We also need to avoid infinite loops in efx_farch_filter_search() when the
+ * table is full.
+ */
+#define EFX_FARCH_FILTER_CTL_SRCH_MAX 200
+
+/* Don't try very hard to find space for performance hints, as this is
+ * counter-productive. */
+#define EFX_FARCH_FILTER_CTL_SRCH_HINT_MAX 5
+
+enum efx_farch_filter_type {
+	EFX_FARCH_FILTER_TCP_FULL = 0,
+	EFX_FARCH_FILTER_TCP_WILD,
+	EFX_FARCH_FILTER_UDP_FULL,
+	EFX_FARCH_FILTER_UDP_WILD,
+	EFX_FARCH_FILTER_MAC_FULL = 4,
+	EFX_FARCH_FILTER_MAC_WILD,
+	EFX_FARCH_FILTER_UC_DEF = 8,
+	EFX_FARCH_FILTER_MC_DEF,
+	EFX_FARCH_FILTER_TYPE_COUNT,		/* number of specific types */
+};
+
+enum efx_farch_filter_table_id {
+	EFX_FARCH_FILTER_TABLE_RX_IP = 0,
+	EFX_FARCH_FILTER_TABLE_RX_MAC,
+	EFX_FARCH_FILTER_TABLE_RX_DEF,
+	EFX_FARCH_FILTER_TABLE_TX_MAC,
+	EFX_FARCH_FILTER_TABLE_COUNT,
+};
+
+enum efx_farch_filter_index {
+	EFX_FARCH_FILTER_INDEX_UC_DEF,
+	EFX_FARCH_FILTER_INDEX_MC_DEF,
+	EFX_FARCH_FILTER_SIZE_RX_DEF,
+};
+
+struct efx_farch_filter_spec {
+	u8	type:4;
+	u8	priority:4;
+	u8	flags;
+	u16	dmaq_id;
+	u32	data[3];
+};
+
+struct efx_farch_filter_table {
+	enum efx_farch_filter_table_id id;
+	u32		offset;		/* address of table relative to BAR */
+	unsigned	size;		/* number of entries */
+	unsigned	step;		/* step between entries */
+	unsigned	used;		/* number currently used */
+	unsigned long	*used_bitmap;
+	struct efx_farch_filter_spec *spec;
+	unsigned	search_limit[EFX_FARCH_FILTER_TYPE_COUNT];
+};
+
+struct efx_farch_filter_state {
+	struct rw_semaphore lock; /* Protects table contents */
+	struct efx_farch_filter_table table[EFX_FARCH_FILTER_TABLE_COUNT];
+};
+
+static void
+efx_farch_filter_table_clear_entry(struct efx_nic *efx,
+				   struct efx_farch_filter_table *table,
+				   unsigned int filter_idx);
+
+/* The filter hash function is LFSR polynomial x^16 + x^3 + 1 of a 32-bit
+ * key derived from the n-tuple.  The initial LFSR state is 0xffff. */
+static u16 efx_farch_filter_hash(u32 key)
+{
+	u16 tmp;
+
+	/* First 16 rounds */
+	tmp = 0x1fff ^ key >> 16;
+	tmp = tmp ^ tmp >> 3 ^ tmp >> 6;
+	tmp = tmp ^ tmp >> 9;
+	/* Last 16 rounds */
+	tmp = tmp ^ tmp << 13 ^ key;
+	tmp = tmp ^ tmp >> 3 ^ tmp >> 6;
+	return tmp ^ tmp >> 9;
+}
+
+/* To allow for hash collisions, filter search continues at these
+ * increments from the first possible entry selected by the hash. */
+static u16 efx_farch_filter_increment(u32 key)
+{
+	return key * 2 - 1;
+}
+
+static enum efx_farch_filter_table_id
+efx_farch_filter_spec_table_id(const struct efx_farch_filter_spec *spec)
+{
+	BUILD_BUG_ON(EFX_FARCH_FILTER_TABLE_RX_IP !=
+		     (EFX_FARCH_FILTER_TCP_FULL >> 2));
+	BUILD_BUG_ON(EFX_FARCH_FILTER_TABLE_RX_IP !=
+		     (EFX_FARCH_FILTER_TCP_WILD >> 2));
+	BUILD_BUG_ON(EFX_FARCH_FILTER_TABLE_RX_IP !=
+		     (EFX_FARCH_FILTER_UDP_FULL >> 2));
+	BUILD_BUG_ON(EFX_FARCH_FILTER_TABLE_RX_IP !=
+		     (EFX_FARCH_FILTER_UDP_WILD >> 2));
+	BUILD_BUG_ON(EFX_FARCH_FILTER_TABLE_RX_MAC !=
+		     (EFX_FARCH_FILTER_MAC_FULL >> 2));
+	BUILD_BUG_ON(EFX_FARCH_FILTER_TABLE_RX_MAC !=
+		     (EFX_FARCH_FILTER_MAC_WILD >> 2));
+	BUILD_BUG_ON(EFX_FARCH_FILTER_TABLE_TX_MAC !=
+		     EFX_FARCH_FILTER_TABLE_RX_MAC + 2);
+	return (spec->type >> 2) + ((spec->flags & EFX_FILTER_FLAG_TX) ? 2 : 0);
+}
+
+static void efx_farch_filter_push_rx_config(struct efx_nic *efx)
+{
+	struct efx_farch_filter_state *state = efx->filter_state;
+	struct efx_farch_filter_table *table;
+	efx_oword_t filter_ctl;
+
+	efx_reado(efx, &filter_ctl, FR_BZ_RX_FILTER_CTL);
+
+	table = &state->table[EFX_FARCH_FILTER_TABLE_RX_IP];
+	EFX_SET_OWORD_FIELD(filter_ctl, FRF_BZ_TCP_FULL_SRCH_LIMIT,
+			    table->search_limit[EFX_FARCH_FILTER_TCP_FULL] +
+			    EFX_FARCH_FILTER_CTL_SRCH_FUDGE_FULL);
+	EFX_SET_OWORD_FIELD(filter_ctl, FRF_BZ_TCP_WILD_SRCH_LIMIT,
+			    table->search_limit[EFX_FARCH_FILTER_TCP_WILD] +
+			    EFX_FARCH_FILTER_CTL_SRCH_FUDGE_WILD);
+	EFX_SET_OWORD_FIELD(filter_ctl, FRF_BZ_UDP_FULL_SRCH_LIMIT,
+			    table->search_limit[EFX_FARCH_FILTER_UDP_FULL] +
+			    EFX_FARCH_FILTER_CTL_SRCH_FUDGE_FULL);
+	EFX_SET_OWORD_FIELD(filter_ctl, FRF_BZ_UDP_WILD_SRCH_LIMIT,
+			    table->search_limit[EFX_FARCH_FILTER_UDP_WILD] +
+			    EFX_FARCH_FILTER_CTL_SRCH_FUDGE_WILD);
+
+	table = &state->table[EFX_FARCH_FILTER_TABLE_RX_MAC];
+	if (table->size) {
+		EFX_SET_OWORD_FIELD(
+			filter_ctl, FRF_CZ_ETHERNET_FULL_SEARCH_LIMIT,
+			table->search_limit[EFX_FARCH_FILTER_MAC_FULL] +
+			EFX_FARCH_FILTER_CTL_SRCH_FUDGE_FULL);
+		EFX_SET_OWORD_FIELD(
+			filter_ctl, FRF_CZ_ETHERNET_WILDCARD_SEARCH_LIMIT,
+			table->search_limit[EFX_FARCH_FILTER_MAC_WILD] +
+			EFX_FARCH_FILTER_CTL_SRCH_FUDGE_WILD);
+	}
+
+	table = &state->table[EFX_FARCH_FILTER_TABLE_RX_DEF];
+	if (table->size) {
+		EFX_SET_OWORD_FIELD(
+			filter_ctl, FRF_CZ_UNICAST_NOMATCH_Q_ID,
+			table->spec[EFX_FARCH_FILTER_INDEX_UC_DEF].dmaq_id);
+		EFX_SET_OWORD_FIELD(
+			filter_ctl, FRF_CZ_UNICAST_NOMATCH_RSS_ENABLED,
+			!!(table->spec[EFX_FARCH_FILTER_INDEX_UC_DEF].flags &
+			   EFX_FILTER_FLAG_RX_RSS));
+		EFX_SET_OWORD_FIELD(
+			filter_ctl, FRF_CZ_MULTICAST_NOMATCH_Q_ID,
+			table->spec[EFX_FARCH_FILTER_INDEX_MC_DEF].dmaq_id);
+		EFX_SET_OWORD_FIELD(
+			filter_ctl, FRF_CZ_MULTICAST_NOMATCH_RSS_ENABLED,
+			!!(table->spec[EFX_FARCH_FILTER_INDEX_MC_DEF].flags &
+			   EFX_FILTER_FLAG_RX_RSS));
+
+		/* There is a single bit to enable RX scatter for all
+		 * unmatched packets.  Only set it if scatter is
+		 * enabled in both filter specs.
+		 */
+		EFX_SET_OWORD_FIELD(
+			filter_ctl, FRF_BZ_SCATTER_ENBL_NO_MATCH_Q,
+			!!(table->spec[EFX_FARCH_FILTER_INDEX_UC_DEF].flags &
+			   table->spec[EFX_FARCH_FILTER_INDEX_MC_DEF].flags &
+			   EFX_FILTER_FLAG_RX_SCATTER));
+	} else {
+		/* We don't expose 'default' filters because unmatched
+		 * packets always go to the queue number found in the
+		 * RSS table.  But we still need to set the RX scatter
+		 * bit here.
+		 */
+		EFX_SET_OWORD_FIELD(
+			filter_ctl, FRF_BZ_SCATTER_ENBL_NO_MATCH_Q,
+			efx->rx_scatter);
+	}
+
+	efx_writeo(efx, &filter_ctl, FR_BZ_RX_FILTER_CTL);
+}
+
+static void efx_farch_filter_push_tx_limits(struct efx_nic *efx)
+{
+	struct efx_farch_filter_state *state = efx->filter_state;
+	struct efx_farch_filter_table *table;
+	efx_oword_t tx_cfg;
+
+	efx_reado(efx, &tx_cfg, FR_AZ_TX_CFG);
+
+	table = &state->table[EFX_FARCH_FILTER_TABLE_TX_MAC];
+	if (table->size) {
+		EFX_SET_OWORD_FIELD(
+			tx_cfg, FRF_CZ_TX_ETH_FILTER_FULL_SEARCH_RANGE,
+			table->search_limit[EFX_FARCH_FILTER_MAC_FULL] +
+			EFX_FARCH_FILTER_CTL_SRCH_FUDGE_FULL);
+		EFX_SET_OWORD_FIELD(
+			tx_cfg, FRF_CZ_TX_ETH_FILTER_WILD_SEARCH_RANGE,
+			table->search_limit[EFX_FARCH_FILTER_MAC_WILD] +
+			EFX_FARCH_FILTER_CTL_SRCH_FUDGE_WILD);
+	}
+
+	efx_writeo(efx, &tx_cfg, FR_AZ_TX_CFG);
+}
+
+static int
+efx_farch_filter_from_gen_spec(struct efx_farch_filter_spec *spec,
+			       const struct efx_filter_spec *gen_spec)
+{
+	bool is_full = false;
+
+	if ((gen_spec->flags & EFX_FILTER_FLAG_RX_RSS) && gen_spec->rss_context)
+		return -EINVAL;
+
+	spec->priority = gen_spec->priority;
+	spec->flags = gen_spec->flags;
+	spec->dmaq_id = gen_spec->dmaq_id;
+
+	switch (gen_spec->match_flags) {
+	case (EFX_FILTER_MATCH_ETHER_TYPE | EFX_FILTER_MATCH_IP_PROTO |
+	      EFX_FILTER_MATCH_LOC_HOST | EFX_FILTER_MATCH_LOC_PORT |
+	      EFX_FILTER_MATCH_REM_HOST | EFX_FILTER_MATCH_REM_PORT):
+		is_full = true;
+		fallthrough;
+	case (EFX_FILTER_MATCH_ETHER_TYPE | EFX_FILTER_MATCH_IP_PROTO |
+	      EFX_FILTER_MATCH_LOC_HOST | EFX_FILTER_MATCH_LOC_PORT): {
+		__be32 rhost, host1, host2;
+		__be16 rport, port1, port2;
+
+		EFX_WARN_ON_PARANOID(!(gen_spec->flags & EFX_FILTER_FLAG_RX));
+
+		if (gen_spec->ether_type != htons(ETH_P_IP))
+			return -EPROTONOSUPPORT;
+		if (gen_spec->loc_port == 0 ||
+		    (is_full && gen_spec->rem_port == 0))
+			return -EADDRNOTAVAIL;
+		switch (gen_spec->ip_proto) {
+		case IPPROTO_TCP:
+			spec->type = (is_full ? EFX_FARCH_FILTER_TCP_FULL :
+				      EFX_FARCH_FILTER_TCP_WILD);
+			break;
+		case IPPROTO_UDP:
+			spec->type = (is_full ? EFX_FARCH_FILTER_UDP_FULL :
+				      EFX_FARCH_FILTER_UDP_WILD);
+			break;
+		default:
+			return -EPROTONOSUPPORT;
+		}
+
+		/* Filter is constructed in terms of source and destination,
+		 * with the odd wrinkle that the ports are swapped in a UDP
+		 * wildcard filter.  We need to convert from local and remote
+		 * (= zero for wildcard) addresses.
+		 */
+		rhost = is_full ? gen_spec->rem_host[0] : 0;
+		rport = is_full ? gen_spec->rem_port : 0;
+		host1 = rhost;
+		host2 = gen_spec->loc_host[0];
+		if (!is_full && gen_spec->ip_proto == IPPROTO_UDP) {
+			port1 = gen_spec->loc_port;
+			port2 = rport;
+		} else {
+			port1 = rport;
+			port2 = gen_spec->loc_port;
+		}
+		spec->data[0] = ntohl(host1) << 16 | ntohs(port1);
+		spec->data[1] = ntohs(port2) << 16 | ntohl(host1) >> 16;
+		spec->data[2] = ntohl(host2);
+
+		break;
+	}
+
+	case EFX_FILTER_MATCH_LOC_MAC | EFX_FILTER_MATCH_OUTER_VID:
+		is_full = true;
+		fallthrough;
+	case EFX_FILTER_MATCH_LOC_MAC:
+		spec->type = (is_full ? EFX_FARCH_FILTER_MAC_FULL :
+			      EFX_FARCH_FILTER_MAC_WILD);
+		spec->data[0] = is_full ? ntohs(gen_spec->outer_vid) : 0;
+		spec->data[1] = (gen_spec->loc_mac[2] << 24 |
+				 gen_spec->loc_mac[3] << 16 |
+				 gen_spec->loc_mac[4] << 8 |
+				 gen_spec->loc_mac[5]);
+		spec->data[2] = (gen_spec->loc_mac[0] << 8 |
+				 gen_spec->loc_mac[1]);
+		break;
+
+	case EFX_FILTER_MATCH_LOC_MAC_IG:
+		spec->type = (is_multicast_ether_addr(gen_spec->loc_mac) ?
+			      EFX_FARCH_FILTER_MC_DEF :
+			      EFX_FARCH_FILTER_UC_DEF);
+		memset(spec->data, 0, sizeof(spec->data)); /* ensure equality */
+		break;
+
+	default:
+		return -EPROTONOSUPPORT;
+	}
+
+	return 0;
+}
+
+static void
+efx_farch_filter_to_gen_spec(struct efx_filter_spec *gen_spec,
+			     const struct efx_farch_filter_spec *spec)
+{
+	bool is_full = false;
+
+	/* *gen_spec should be completely initialised, to be consistent
+	 * with efx_filter_init_{rx,tx}() and in case we want to copy
+	 * it back to userland.
+	 */
+	memset(gen_spec, 0, sizeof(*gen_spec));
+
+	gen_spec->priority = spec->priority;
+	gen_spec->flags = spec->flags;
+	gen_spec->dmaq_id = spec->dmaq_id;
+
+	switch (spec->type) {
+	case EFX_FARCH_FILTER_TCP_FULL:
+	case EFX_FARCH_FILTER_UDP_FULL:
+		is_full = true;
+		fallthrough;
+	case EFX_FARCH_FILTER_TCP_WILD:
+	case EFX_FARCH_FILTER_UDP_WILD: {
+		__be32 host1, host2;
+		__be16 port1, port2;
+
+		gen_spec->match_flags =
+			EFX_FILTER_MATCH_ETHER_TYPE |
+			EFX_FILTER_MATCH_IP_PROTO |
+			EFX_FILTER_MATCH_LOC_HOST | EFX_FILTER_MATCH_LOC_PORT;
+		if (is_full)
+			gen_spec->match_flags |= (EFX_FILTER_MATCH_REM_HOST |
+						  EFX_FILTER_MATCH_REM_PORT);
+		gen_spec->ether_type = htons(ETH_P_IP);
+		gen_spec->ip_proto =
+			(spec->type == EFX_FARCH_FILTER_TCP_FULL ||
+			 spec->type == EFX_FARCH_FILTER_TCP_WILD) ?
+			IPPROTO_TCP : IPPROTO_UDP;
+
+		host1 = htonl(spec->data[0] >> 16 | spec->data[1] << 16);
+		port1 = htons(spec->data[0]);
+		host2 = htonl(spec->data[2]);
+		port2 = htons(spec->data[1] >> 16);
+		if (spec->flags & EFX_FILTER_FLAG_TX) {
+			gen_spec->loc_host[0] = host1;
+			gen_spec->rem_host[0] = host2;
+		} else {
+			gen_spec->loc_host[0] = host2;
+			gen_spec->rem_host[0] = host1;
+		}
+		if (!!(gen_spec->flags & EFX_FILTER_FLAG_TX) ^
+		    (!is_full && gen_spec->ip_proto == IPPROTO_UDP)) {
+			gen_spec->loc_port = port1;
+			gen_spec->rem_port = port2;
+		} else {
+			gen_spec->loc_port = port2;
+			gen_spec->rem_port = port1;
+		}
+
+		break;
+	}
+
+	case EFX_FARCH_FILTER_MAC_FULL:
+		is_full = true;
+		fallthrough;
+	case EFX_FARCH_FILTER_MAC_WILD:
+		gen_spec->match_flags = EFX_FILTER_MATCH_LOC_MAC;
+		if (is_full)
+			gen_spec->match_flags |= EFX_FILTER_MATCH_OUTER_VID;
+		gen_spec->loc_mac[0] = spec->data[2] >> 8;
+		gen_spec->loc_mac[1] = spec->data[2];
+		gen_spec->loc_mac[2] = spec->data[1] >> 24;
+		gen_spec->loc_mac[3] = spec->data[1] >> 16;
+		gen_spec->loc_mac[4] = spec->data[1] >> 8;
+		gen_spec->loc_mac[5] = spec->data[1];
+		gen_spec->outer_vid = htons(spec->data[0]);
+		break;
+
+	case EFX_FARCH_FILTER_UC_DEF:
+	case EFX_FARCH_FILTER_MC_DEF:
+		gen_spec->match_flags = EFX_FILTER_MATCH_LOC_MAC_IG;
+		gen_spec->loc_mac[0] = spec->type == EFX_FARCH_FILTER_MC_DEF;
+		break;
+
+	default:
+		WARN_ON(1);
+		break;
+	}
+}
+
+static void
+efx_farch_filter_init_rx_auto(struct efx_nic *efx,
+			      struct efx_farch_filter_spec *spec)
+{
+	/* If there's only one channel then disable RSS for non VF
+	 * traffic, thereby allowing VFs to use RSS when the PF can't.
+	 */
+	spec->priority = EFX_FILTER_PRI_AUTO;
+	spec->flags = (EFX_FILTER_FLAG_RX |
+		       (efx_rss_enabled(efx) ? EFX_FILTER_FLAG_RX_RSS : 0) |
+		       (efx->rx_scatter ? EFX_FILTER_FLAG_RX_SCATTER : 0));
+	spec->dmaq_id = 0;
+}
+
+/* Build a filter entry and return its n-tuple key. */
+static u32 efx_farch_filter_build(efx_oword_t *filter,
+				  struct efx_farch_filter_spec *spec)
+{
+	u32 data3;
+
+	switch (efx_farch_filter_spec_table_id(spec)) {
+	case EFX_FARCH_FILTER_TABLE_RX_IP: {
+		bool is_udp = (spec->type == EFX_FARCH_FILTER_UDP_FULL ||
+			       spec->type == EFX_FARCH_FILTER_UDP_WILD);
+		EFX_POPULATE_OWORD_7(
+			*filter,
+			FRF_BZ_RSS_EN,
+			!!(spec->flags & EFX_FILTER_FLAG_RX_RSS),
+			FRF_BZ_SCATTER_EN,
+			!!(spec->flags & EFX_FILTER_FLAG_RX_SCATTER),
+			FRF_BZ_TCP_UDP, is_udp,
+			FRF_BZ_RXQ_ID, spec->dmaq_id,
+			EFX_DWORD_2, spec->data[2],
+			EFX_DWORD_1, spec->data[1],
+			EFX_DWORD_0, spec->data[0]);
+		data3 = is_udp;
+		break;
+	}
+
+	case EFX_FARCH_FILTER_TABLE_RX_MAC: {
+		bool is_wild = spec->type == EFX_FARCH_FILTER_MAC_WILD;
+		EFX_POPULATE_OWORD_7(
+			*filter,
+			FRF_CZ_RMFT_RSS_EN,
+			!!(spec->flags & EFX_FILTER_FLAG_RX_RSS),
+			FRF_CZ_RMFT_SCATTER_EN,
+			!!(spec->flags & EFX_FILTER_FLAG_RX_SCATTER),
+			FRF_CZ_RMFT_RXQ_ID, spec->dmaq_id,
+			FRF_CZ_RMFT_WILDCARD_MATCH, is_wild,
+			FRF_CZ_RMFT_DEST_MAC_HI, spec->data[2],
+			FRF_CZ_RMFT_DEST_MAC_LO, spec->data[1],
+			FRF_CZ_RMFT_VLAN_ID, spec->data[0]);
+		data3 = is_wild;
+		break;
+	}
+
+	case EFX_FARCH_FILTER_TABLE_TX_MAC: {
+		bool is_wild = spec->type == EFX_FARCH_FILTER_MAC_WILD;
+		EFX_POPULATE_OWORD_5(*filter,
+				     FRF_CZ_TMFT_TXQ_ID, spec->dmaq_id,
+				     FRF_CZ_TMFT_WILDCARD_MATCH, is_wild,
+				     FRF_CZ_TMFT_SRC_MAC_HI, spec->data[2],
+				     FRF_CZ_TMFT_SRC_MAC_LO, spec->data[1],
+				     FRF_CZ_TMFT_VLAN_ID, spec->data[0]);
+		data3 = is_wild | spec->dmaq_id << 1;
+		break;
+	}
+
+	default:
+		BUG();
+	}
+
+	return spec->data[0] ^ spec->data[1] ^ spec->data[2] ^ data3;
+}
+
+static bool efx_farch_filter_equal(const struct efx_farch_filter_spec *left,
+				   const struct efx_farch_filter_spec *right)
+{
+	if (left->type != right->type ||
+	    memcmp(left->data, right->data, sizeof(left->data)))
+		return false;
+
+	if (left->flags & EFX_FILTER_FLAG_TX &&
+	    left->dmaq_id != right->dmaq_id)
+		return false;
+
+	return true;
+}
+
+/*
+ * Construct/deconstruct external filter IDs.  At least the RX filter
+ * IDs must be ordered by matching priority, for RX NFC semantics.
+ *
+ * Deconstruction needs to be robust against invalid IDs so that
+ * efx_filter_remove_id_safe() and efx_filter_get_filter_safe() can
+ * accept user-provided IDs.
+ */
+
+#define EFX_FARCH_FILTER_MATCH_PRI_COUNT	5
+
+static const u8 efx_farch_filter_type_match_pri[EFX_FARCH_FILTER_TYPE_COUNT] = {
+	[EFX_FARCH_FILTER_TCP_FULL]	= 0,
+	[EFX_FARCH_FILTER_UDP_FULL]	= 0,
+	[EFX_FARCH_FILTER_TCP_WILD]	= 1,
+	[EFX_FARCH_FILTER_UDP_WILD]	= 1,
+	[EFX_FARCH_FILTER_MAC_FULL]	= 2,
+	[EFX_FARCH_FILTER_MAC_WILD]	= 3,
+	[EFX_FARCH_FILTER_UC_DEF]	= 4,
+	[EFX_FARCH_FILTER_MC_DEF]	= 4,
+};
+
+static const enum efx_farch_filter_table_id efx_farch_filter_range_table[] = {
+	EFX_FARCH_FILTER_TABLE_RX_IP,	/* RX match pri 0 */
+	EFX_FARCH_FILTER_TABLE_RX_IP,
+	EFX_FARCH_FILTER_TABLE_RX_MAC,
+	EFX_FARCH_FILTER_TABLE_RX_MAC,
+	EFX_FARCH_FILTER_TABLE_RX_DEF,	/* RX match pri 4 */
+	EFX_FARCH_FILTER_TABLE_TX_MAC,	/* TX match pri 0 */
+	EFX_FARCH_FILTER_TABLE_TX_MAC,	/* TX match pri 1 */
+};
+
+#define EFX_FARCH_FILTER_INDEX_WIDTH 13
+#define EFX_FARCH_FILTER_INDEX_MASK ((1 << EFX_FARCH_FILTER_INDEX_WIDTH) - 1)
+
+static inline u32
+efx_farch_filter_make_id(const struct efx_farch_filter_spec *spec,
+			 unsigned int index)
+{
+	unsigned int range;
+
+	range = efx_farch_filter_type_match_pri[spec->type];
+	if (!(spec->flags & EFX_FILTER_FLAG_RX))
+		range += EFX_FARCH_FILTER_MATCH_PRI_COUNT;
+
+	return range << EFX_FARCH_FILTER_INDEX_WIDTH | index;
+}
+
+static inline enum efx_farch_filter_table_id
+efx_farch_filter_id_table_id(u32 id)
+{
+	unsigned int range = id >> EFX_FARCH_FILTER_INDEX_WIDTH;
+
+	if (range < ARRAY_SIZE(efx_farch_filter_range_table))
+		return efx_farch_filter_range_table[range];
+	else
+		return EFX_FARCH_FILTER_TABLE_COUNT; /* invalid */
+}
+
+static inline unsigned int efx_farch_filter_id_index(u32 id)
+{
+	return id & EFX_FARCH_FILTER_INDEX_MASK;
+}
+
+u32 efx_farch_filter_get_rx_id_limit(struct efx_nic *efx)
+{
+	struct efx_farch_filter_state *state = efx->filter_state;
+	unsigned int range = EFX_FARCH_FILTER_MATCH_PRI_COUNT - 1;
+	enum efx_farch_filter_table_id table_id;
+
+	do {
+		table_id = efx_farch_filter_range_table[range];
+		if (state->table[table_id].size != 0)
+			return range << EFX_FARCH_FILTER_INDEX_WIDTH |
+				state->table[table_id].size;
+	} while (range--);
+
+	return 0;
+}
+
+s32 efx_farch_filter_insert(struct efx_nic *efx,
+			    struct efx_filter_spec *gen_spec,
+			    bool replace_equal)
+{
+	struct efx_farch_filter_state *state = efx->filter_state;
+	struct efx_farch_filter_table *table;
+	struct efx_farch_filter_spec spec;
+	efx_oword_t filter;
+	int rep_index, ins_index;
+	unsigned int depth = 0;
+	int rc;
+
+	rc = efx_farch_filter_from_gen_spec(&spec, gen_spec);
+	if (rc)
+		return rc;
+
+	down_write(&state->lock);
+
+	table = &state->table[efx_farch_filter_spec_table_id(&spec)];
+	if (table->size == 0) {
+		rc = -EINVAL;
+		goto out_unlock;
+	}
+
+	netif_vdbg(efx, hw, efx->net_dev,
+		   "%s: type %d search_limit=%d", __func__, spec.type,
+		   table->search_limit[spec.type]);
+
+	if (table->id == EFX_FARCH_FILTER_TABLE_RX_DEF) {
+		/* One filter spec per type */
+		BUILD_BUG_ON(EFX_FARCH_FILTER_INDEX_UC_DEF != 0);
+		BUILD_BUG_ON(EFX_FARCH_FILTER_INDEX_MC_DEF !=
+			     EFX_FARCH_FILTER_MC_DEF - EFX_FARCH_FILTER_UC_DEF);
+		rep_index = spec.type - EFX_FARCH_FILTER_UC_DEF;
+		ins_index = rep_index;
+	} else {
+		/* Search concurrently for
+		 * (1) a filter to be replaced (rep_index): any filter
+		 *     with the same match values, up to the current
+		 *     search depth for this type, and
+		 * (2) the insertion point (ins_index): (1) or any
+		 *     free slot before it or up to the maximum search
+		 *     depth for this priority
+		 * We fail if we cannot find (2).
+		 *
+		 * We can stop once either
+		 * (a) we find (1), in which case we have definitely
+		 *     found (2) as well; or
+		 * (b) we have searched exhaustively for (1), and have
+		 *     either found (2) or searched exhaustively for it
+		 */
+		u32 key = efx_farch_filter_build(&filter, &spec);
+		unsigned int hash = efx_farch_filter_hash(key);
+		unsigned int incr = efx_farch_filter_increment(key);
+		unsigned int max_rep_depth = table->search_limit[spec.type];
+		unsigned int max_ins_depth =
+			spec.priority <= EFX_FILTER_PRI_HINT ?
+			EFX_FARCH_FILTER_CTL_SRCH_HINT_MAX :
+			EFX_FARCH_FILTER_CTL_SRCH_MAX;
+		unsigned int i = hash & (table->size - 1);
+
+		ins_index = -1;
+		depth = 1;
+
+		for (;;) {
+			if (!test_bit(i, table->used_bitmap)) {
+				if (ins_index < 0)
+					ins_index = i;
+			} else if (efx_farch_filter_equal(&spec,
+							  &table->spec[i])) {
+				/* Case (a) */
+				if (ins_index < 0)
+					ins_index = i;
+				rep_index = i;
+				break;
+			}
+
+			if (depth >= max_rep_depth &&
+			    (ins_index >= 0 || depth >= max_ins_depth)) {
+				/* Case (b) */
+				if (ins_index < 0) {
+					rc = -EBUSY;
+					goto out_unlock;
+				}
+				rep_index = -1;
+				break;
+			}
+
+			i = (i + incr) & (table->size - 1);
+			++depth;
+		}
+	}
+
+	/* If we found a filter to be replaced, check whether we
+	 * should do so
+	 */
+	if (rep_index >= 0) {
+		struct efx_farch_filter_spec *saved_spec =
+			&table->spec[rep_index];
+
+		if (spec.priority == saved_spec->priority && !replace_equal) {
+			rc = -EEXIST;
+			goto out_unlock;
+		}
+		if (spec.priority < saved_spec->priority) {
+			rc = -EPERM;
+			goto out_unlock;
+		}
+		if (saved_spec->priority == EFX_FILTER_PRI_AUTO ||
+		    saved_spec->flags & EFX_FILTER_FLAG_RX_OVER_AUTO)
+			spec.flags |= EFX_FILTER_FLAG_RX_OVER_AUTO;
+	}
+
+	/* Insert the filter */
+	if (ins_index != rep_index) {
+		__set_bit(ins_index, table->used_bitmap);
+		++table->used;
+	}
+	table->spec[ins_index] = spec;
+
+	if (table->id == EFX_FARCH_FILTER_TABLE_RX_DEF) {
+		efx_farch_filter_push_rx_config(efx);
+	} else {
+		if (table->search_limit[spec.type] < depth) {
+			table->search_limit[spec.type] = depth;
+			if (spec.flags & EFX_FILTER_FLAG_TX)
+				efx_farch_filter_push_tx_limits(efx);
+			else
+				efx_farch_filter_push_rx_config(efx);
+		}
+
+		efx_writeo(efx, &filter,
+			   table->offset + table->step * ins_index);
+
+		/* If we were able to replace a filter by inserting
+		 * at a lower depth, clear the replaced filter
+		 */
+		if (ins_index != rep_index && rep_index >= 0)
+			efx_farch_filter_table_clear_entry(efx, table,
+							   rep_index);
+	}
+
+	netif_vdbg(efx, hw, efx->net_dev,
+		   "%s: filter type %d index %d rxq %u set",
+		   __func__, spec.type, ins_index, spec.dmaq_id);
+	rc = efx_farch_filter_make_id(&spec, ins_index);
+
+out_unlock:
+	up_write(&state->lock);
+	return rc;
+}
+
+static void
+efx_farch_filter_table_clear_entry(struct efx_nic *efx,
+				   struct efx_farch_filter_table *table,
+				   unsigned int filter_idx)
+{
+	static efx_oword_t filter;
+
+	EFX_WARN_ON_PARANOID(!test_bit(filter_idx, table->used_bitmap));
+	BUG_ON(table->offset == 0); /* can't clear MAC default filters */
+
+	__clear_bit(filter_idx, table->used_bitmap);
+	--table->used;
+	memset(&table->spec[filter_idx], 0, sizeof(table->spec[0]));
+
+	efx_writeo(efx, &filter, table->offset + table->step * filter_idx);
+
+	/* If this filter required a greater search depth than
+	 * any other, the search limit for its type can now be
+	 * decreased.  However, it is hard to determine that
+	 * unless the table has become completely empty - in
+	 * which case, all its search limits can be set to 0.
+	 */
+	if (unlikely(table->used == 0)) {
+		memset(table->search_limit, 0, sizeof(table->search_limit));
+		if (table->id == EFX_FARCH_FILTER_TABLE_TX_MAC)
+			efx_farch_filter_push_tx_limits(efx);
+		else
+			efx_farch_filter_push_rx_config(efx);
+	}
+}
+
+static int efx_farch_filter_remove(struct efx_nic *efx,
+				   struct efx_farch_filter_table *table,
+				   unsigned int filter_idx,
+				   enum efx_filter_priority priority)
+{
+	struct efx_farch_filter_spec *spec = &table->spec[filter_idx];
+
+	if (!test_bit(filter_idx, table->used_bitmap) ||
+	    spec->priority != priority)
+		return -ENOENT;
+
+	if (spec->flags & EFX_FILTER_FLAG_RX_OVER_AUTO) {
+		efx_farch_filter_init_rx_auto(efx, spec);
+		efx_farch_filter_push_rx_config(efx);
+	} else {
+		efx_farch_filter_table_clear_entry(efx, table, filter_idx);
+	}
+
+	return 0;
+}
+
+int efx_farch_filter_remove_safe(struct efx_nic *efx,
+				 enum efx_filter_priority priority,
+				 u32 filter_id)
+{
+	struct efx_farch_filter_state *state = efx->filter_state;
+	enum efx_farch_filter_table_id table_id;
+	struct efx_farch_filter_table *table;
+	unsigned int filter_idx;
+	int rc;
+
+	table_id = efx_farch_filter_id_table_id(filter_id);
+	if ((unsigned int)table_id >= EFX_FARCH_FILTER_TABLE_COUNT)
+		return -ENOENT;
+	table = &state->table[table_id];
+
+	filter_idx = efx_farch_filter_id_index(filter_id);
+	if (filter_idx >= table->size)
+		return -ENOENT;
+	down_write(&state->lock);
+
+	rc = efx_farch_filter_remove(efx, table, filter_idx, priority);
+	up_write(&state->lock);
+
+	return rc;
+}
+
+int efx_farch_filter_get_safe(struct efx_nic *efx,
+			      enum efx_filter_priority priority,
+			      u32 filter_id, struct efx_filter_spec *spec_buf)
+{
+	struct efx_farch_filter_state *state = efx->filter_state;
+	enum efx_farch_filter_table_id table_id;
+	struct efx_farch_filter_table *table;
+	struct efx_farch_filter_spec *spec;
+	unsigned int filter_idx;
+	int rc = -ENOENT;
+
+	down_read(&state->lock);
+
+	table_id = efx_farch_filter_id_table_id(filter_id);
+	if ((unsigned int)table_id >= EFX_FARCH_FILTER_TABLE_COUNT)
+		goto out_unlock;
+	table = &state->table[table_id];
+
+	filter_idx = efx_farch_filter_id_index(filter_id);
+	if (filter_idx >= table->size)
+		goto out_unlock;
+	spec = &table->spec[filter_idx];
+
+	if (test_bit(filter_idx, table->used_bitmap) &&
+	    spec->priority == priority) {
+		efx_farch_filter_to_gen_spec(spec_buf, spec);
+		rc = 0;
+	}
+
+out_unlock:
+	up_read(&state->lock);
+	return rc;
+}
+
+static void
+efx_farch_filter_table_clear(struct efx_nic *efx,
+			     enum efx_farch_filter_table_id table_id,
+			     enum efx_filter_priority priority)
+{
+	struct efx_farch_filter_state *state = efx->filter_state;
+	struct efx_farch_filter_table *table = &state->table[table_id];
+	unsigned int filter_idx;
+
+	down_write(&state->lock);
+	for (filter_idx = 0; filter_idx < table->size; ++filter_idx) {
+		if (table->spec[filter_idx].priority != EFX_FILTER_PRI_AUTO)
+			efx_farch_filter_remove(efx, table,
+						filter_idx, priority);
+	}
+	up_write(&state->lock);
+}
+
+int efx_farch_filter_clear_rx(struct efx_nic *efx,
+			       enum efx_filter_priority priority)
+{
+	efx_farch_filter_table_clear(efx, EFX_FARCH_FILTER_TABLE_RX_IP,
+				     priority);
+	efx_farch_filter_table_clear(efx, EFX_FARCH_FILTER_TABLE_RX_MAC,
+				     priority);
+	efx_farch_filter_table_clear(efx, EFX_FARCH_FILTER_TABLE_RX_DEF,
+				     priority);
+	return 0;
+}
+
+u32 efx_farch_filter_count_rx_used(struct efx_nic *efx,
+				   enum efx_filter_priority priority)
+{
+	struct efx_farch_filter_state *state = efx->filter_state;
+	enum efx_farch_filter_table_id table_id;
+	struct efx_farch_filter_table *table;
+	unsigned int filter_idx;
+	u32 count = 0;
+
+	down_read(&state->lock);
+
+	for (table_id = EFX_FARCH_FILTER_TABLE_RX_IP;
+	     table_id <= EFX_FARCH_FILTER_TABLE_RX_DEF;
+	     table_id++) {
+		table = &state->table[table_id];
+		for (filter_idx = 0; filter_idx < table->size; filter_idx++) {
+			if (test_bit(filter_idx, table->used_bitmap) &&
+			    table->spec[filter_idx].priority == priority)
+				++count;
+		}
+	}
+
+	up_read(&state->lock);
+
+	return count;
+}
+
+s32 efx_farch_filter_get_rx_ids(struct efx_nic *efx,
+				enum efx_filter_priority priority,
+				u32 *buf, u32 size)
+{
+	struct efx_farch_filter_state *state = efx->filter_state;
+	enum efx_farch_filter_table_id table_id;
+	struct efx_farch_filter_table *table;
+	unsigned int filter_idx;
+	s32 count = 0;
+
+	down_read(&state->lock);
+
+	for (table_id = EFX_FARCH_FILTER_TABLE_RX_IP;
+	     table_id <= EFX_FARCH_FILTER_TABLE_RX_DEF;
+	     table_id++) {
+		table = &state->table[table_id];
+		for (filter_idx = 0; filter_idx < table->size; filter_idx++) {
+			if (test_bit(filter_idx, table->used_bitmap) &&
+			    table->spec[filter_idx].priority == priority) {
+				if (count == size) {
+					count = -EMSGSIZE;
+					goto out;
+				}
+				buf[count++] = efx_farch_filter_make_id(
+					&table->spec[filter_idx], filter_idx);
+			}
+		}
+	}
+out:
+	up_read(&state->lock);
+
+	return count;
+}
+
+/* Restore filter stater after reset */
+void efx_farch_filter_table_restore(struct efx_nic *efx)
+{
+	struct efx_farch_filter_state *state = efx->filter_state;
+	enum efx_farch_filter_table_id table_id;
+	struct efx_farch_filter_table *table;
+	efx_oword_t filter;
+	unsigned int filter_idx;
+
+	down_write(&state->lock);
+
+	for (table_id = 0; table_id < EFX_FARCH_FILTER_TABLE_COUNT; table_id++) {
+		table = &state->table[table_id];
+
+		/* Check whether this is a regular register table */
+		if (table->step == 0)
+			continue;
+
+		for (filter_idx = 0; filter_idx < table->size; filter_idx++) {
+			if (!test_bit(filter_idx, table->used_bitmap))
+				continue;
+			efx_farch_filter_build(&filter, &table->spec[filter_idx]);
+			efx_writeo(efx, &filter,
+				   table->offset + table->step * filter_idx);
+		}
+	}
+
+	efx_farch_filter_push_rx_config(efx);
+	efx_farch_filter_push_tx_limits(efx);
+
+	up_write(&state->lock);
+}
+
+void efx_farch_filter_table_remove(struct efx_nic *efx)
+{
+	struct efx_farch_filter_state *state = efx->filter_state;
+	enum efx_farch_filter_table_id table_id;
+
+	for (table_id = 0; table_id < EFX_FARCH_FILTER_TABLE_COUNT; table_id++) {
+		kfree(state->table[table_id].used_bitmap);
+		vfree(state->table[table_id].spec);
+	}
+	kfree(state);
+}
+
+int efx_farch_filter_table_probe(struct efx_nic *efx)
+{
+	struct efx_farch_filter_state *state;
+	struct efx_farch_filter_table *table;
+	unsigned table_id;
+
+	state = kzalloc(sizeof(struct efx_farch_filter_state), GFP_KERNEL);
+	if (!state)
+		return -ENOMEM;
+	efx->filter_state = state;
+	init_rwsem(&state->lock);
+
+	table = &state->table[EFX_FARCH_FILTER_TABLE_RX_IP];
+	table->id = EFX_FARCH_FILTER_TABLE_RX_IP;
+	table->offset = FR_BZ_RX_FILTER_TBL0;
+	table->size = FR_BZ_RX_FILTER_TBL0_ROWS;
+	table->step = FR_BZ_RX_FILTER_TBL0_STEP;
+
+	table = &state->table[EFX_FARCH_FILTER_TABLE_RX_MAC];
+	table->id = EFX_FARCH_FILTER_TABLE_RX_MAC;
+	table->offset = FR_CZ_RX_MAC_FILTER_TBL0;
+	table->size = FR_CZ_RX_MAC_FILTER_TBL0_ROWS;
+	table->step = FR_CZ_RX_MAC_FILTER_TBL0_STEP;
+
+	table = &state->table[EFX_FARCH_FILTER_TABLE_RX_DEF];
+	table->id = EFX_FARCH_FILTER_TABLE_RX_DEF;
+	table->size = EFX_FARCH_FILTER_SIZE_RX_DEF;
+
+	table = &state->table[EFX_FARCH_FILTER_TABLE_TX_MAC];
+	table->id = EFX_FARCH_FILTER_TABLE_TX_MAC;
+	table->offset = FR_CZ_TX_MAC_FILTER_TBL0;
+	table->size = FR_CZ_TX_MAC_FILTER_TBL0_ROWS;
+	table->step = FR_CZ_TX_MAC_FILTER_TBL0_STEP;
+
+	for (table_id = 0; table_id < EFX_FARCH_FILTER_TABLE_COUNT; table_id++) {
+		table = &state->table[table_id];
+		if (table->size == 0)
+			continue;
+		table->used_bitmap = kcalloc(BITS_TO_LONGS(table->size),
+					     sizeof(unsigned long),
+					     GFP_KERNEL);
+		if (!table->used_bitmap)
+			goto fail;
+		table->spec = vzalloc(array_size(sizeof(*table->spec),
+						 table->size));
+		if (!table->spec)
+			goto fail;
+	}
+
+	table = &state->table[EFX_FARCH_FILTER_TABLE_RX_DEF];
+	if (table->size) {
+		/* RX default filters must always exist */
+		struct efx_farch_filter_spec *spec;
+		unsigned i;
+
+		for (i = 0; i < EFX_FARCH_FILTER_SIZE_RX_DEF; i++) {
+			spec = &table->spec[i];
+			spec->type = EFX_FARCH_FILTER_UC_DEF + i;
+			efx_farch_filter_init_rx_auto(efx, spec);
+			__set_bit(i, table->used_bitmap);
+		}
+	}
+
+	efx_farch_filter_push_rx_config(efx);
+
+	return 0;
+
+fail:
+	efx_farch_filter_table_remove(efx);
+	return -ENOMEM;
+}
+
+/* Update scatter enable flags for filters pointing to our own RX queues */
+void efx_farch_filter_update_rx_scatter(struct efx_nic *efx)
+{
+	struct efx_farch_filter_state *state = efx->filter_state;
+	enum efx_farch_filter_table_id table_id;
+	struct efx_farch_filter_table *table;
+	efx_oword_t filter;
+	unsigned int filter_idx;
+
+	down_write(&state->lock);
+
+	for (table_id = EFX_FARCH_FILTER_TABLE_RX_IP;
+	     table_id <= EFX_FARCH_FILTER_TABLE_RX_DEF;
+	     table_id++) {
+		table = &state->table[table_id];
+
+		for (filter_idx = 0; filter_idx < table->size; filter_idx++) {
+			if (!test_bit(filter_idx, table->used_bitmap) ||
+			    table->spec[filter_idx].dmaq_id >=
+			    efx->n_rx_channels)
+				continue;
+
+			if (efx->rx_scatter)
+				table->spec[filter_idx].flags |=
+					EFX_FILTER_FLAG_RX_SCATTER;
+			else
+				table->spec[filter_idx].flags &=
+					~EFX_FILTER_FLAG_RX_SCATTER;
+
+			if (table_id == EFX_FARCH_FILTER_TABLE_RX_DEF)
+				/* Pushed by efx_farch_filter_push_rx_config() */
+				continue;
+
+			efx_farch_filter_build(&filter, &table->spec[filter_idx]);
+			efx_writeo(efx, &filter,
+				   table->offset + table->step * filter_idx);
+		}
+	}
+
+	efx_farch_filter_push_rx_config(efx);
+
+	up_write(&state->lock);
+}
+
+#ifdef CONFIG_RFS_ACCEL
+
+bool efx_farch_filter_rfs_expire_one(struct efx_nic *efx, u32 flow_id,
+				     unsigned int index)
+{
+	struct efx_farch_filter_state *state = efx->filter_state;
+	struct efx_farch_filter_table *table;
+	bool ret = false, force = false;
+	u16 arfs_id;
+
+	down_write(&state->lock);
+	spin_lock_bh(&efx->rps_hash_lock);
+	table = &state->table[EFX_FARCH_FILTER_TABLE_RX_IP];
+	if (test_bit(index, table->used_bitmap) &&
+	    table->spec[index].priority == EFX_FILTER_PRI_HINT) {
+		struct efx_arfs_rule *rule = NULL;
+		struct efx_filter_spec spec;
+
+		efx_farch_filter_to_gen_spec(&spec, &table->spec[index]);
+		if (!efx->rps_hash_table) {
+			/* In the absence of the table, we always returned 0 to
+			 * ARFS, so use the same to query it.
+			 */
+			arfs_id = 0;
+		} else {
+			rule = efx_rps_hash_find(efx, &spec);
+			if (!rule) {
+				/* ARFS table doesn't know of this filter, remove it */
+				force = true;
+			} else {
+				arfs_id = rule->arfs_id;
+				if (!efx_rps_check_rule(rule, index, &force))
+					goto out_unlock;
+			}
+		}
+		if (force || rps_may_expire_flow(efx->net_dev, spec.dmaq_id,
+						 flow_id, arfs_id)) {
+			if (rule)
+				rule->filter_id = EFX_ARFS_FILTER_ID_REMOVING;
+			efx_rps_hash_del(efx, &spec);
+			efx_farch_filter_table_clear_entry(efx, table, index);
+			ret = true;
+		}
+	}
+out_unlock:
+	spin_unlock_bh(&efx->rps_hash_lock);
+	up_write(&state->lock);
+	return ret;
+}
+
+#endif /* CONFIG_RFS_ACCEL */
+
+void efx_farch_filter_sync_rx_mode(struct efx_nic *efx)
+{
+	struct net_device *net_dev = efx->net_dev;
+	struct netdev_hw_addr *ha;
+	union efx_multicast_hash *mc_hash = &efx->multicast_hash;
+	u32 crc;
+	int bit;
+
+	if (!efx_dev_registered(efx))
+		return;
+
+	netif_addr_lock_bh(net_dev);
+
+	efx->unicast_filter = !(net_dev->flags & IFF_PROMISC);
+
+	/* Build multicast hash table */
+	if (net_dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
+		memset(mc_hash, 0xff, sizeof(*mc_hash));
+	} else {
+		memset(mc_hash, 0x00, sizeof(*mc_hash));
+		netdev_for_each_mc_addr(ha, net_dev) {
+			crc = ether_crc_le(ETH_ALEN, ha->addr);
+			bit = crc & (EFX_MCAST_HASH_ENTRIES - 1);
+			__set_bit_le(bit, mc_hash);
+		}
+
+		/* Broadcast packets go through the multicast hash filter.
+		 * ether_crc_le() of the broadcast address is 0xbe2612ff
+		 * so we always add bit 0xff to the mask.
+		 */
+		__set_bit_le(0xff, mc_hash);
+	}
+
+	netif_addr_unlock_bh(net_dev);
+}