// SPDX-License-Identifier: GPL-2.0-only
|
/****************************************************************************
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* Driver for Solarflare network controllers and boards
|
* Copyright 2005-2006 Fen Systems Ltd.
|
* Copyright 2006-2013 Solarflare Communications Inc.
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*/
|
|
#include <linux/bitops.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/pci.h>
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#include <linux/module.h>
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#include <linux/seq_file.h>
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#include <linux/crc32.h>
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#include "net_driver.h"
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#include "bitfield.h"
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#include "efx.h"
|
#include "rx_common.h"
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#include "nic.h"
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#include "farch_regs.h"
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#include "sriov.h"
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#include "siena_sriov.h"
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#include "io.h"
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#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
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#define TX_DC_ENTRIES_ORDER 1
|
|
#define RX_DC_ENTRIES 64
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#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))
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#define EFX_CHANNEL_MAGIC_TX_DRAIN(_tx_queue) \
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_EFX_CHANNEL_MAGIC(_EFX_CHANNEL_MAGIC_TX_DRAIN, \
|
(_tx_queue)->queue)
|
|
static void efx_farch_magic_event(struct efx_channel *channel, u32 magic);
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|
/**************************************************************************
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*
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* Hardware access
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*
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**************************************************************************/
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static inline void efx_write_buf_tbl(struct efx_nic *efx, efx_qword_t *value,
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unsigned int index)
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{
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efx_sram_writeq(efx, efx->membase + efx->type->buf_tbl_base,
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value, index);
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}
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static bool efx_masked_compare_oword(const efx_oword_t *a, const efx_oword_t *b,
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const efx_oword_t *mask)
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{
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return ((a->u64[0] ^ b->u64[0]) & mask->u64[0]) ||
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((a->u64[1] ^ b->u64[1]) & mask->u64[1]);
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}
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int efx_farch_test_registers(struct efx_nic *efx,
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const struct efx_farch_register_test *regs,
|
size_t n_regs)
|
{
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unsigned address = 0;
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int i, j;
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efx_oword_t mask, imask, original, reg, buf;
|
|
for (i = 0; i < n_regs; ++i) {
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address = regs[i].address;
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mask = imask = regs[i].mask;
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EFX_INVERT_OWORD(imask);
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efx_reado(efx, &original, address);
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/* bit sweep on and off */
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for (j = 0; j < 128; j++) {
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if (!EFX_EXTRACT_OWORD32(mask, j, j))
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continue;
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/* Test this testable bit can be set in isolation */
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EFX_AND_OWORD(reg, original, mask);
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EFX_SET_OWORD32(reg, j, j, 1);
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efx_writeo(efx, ®, address);
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efx_reado(efx, &buf, address);
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if (efx_masked_compare_oword(®, &buf, &mask))
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goto fail;
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/* Test this testable bit can be cleared in isolation */
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EFX_OR_OWORD(reg, original, mask);
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EFX_SET_OWORD32(reg, j, j, 0);
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efx_writeo(efx, ®, address);
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efx_reado(efx, &buf, address);
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if (efx_masked_compare_oword(®, &buf, &mask))
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goto fail;
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}
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efx_writeo(efx, &original, address);
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}
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return 0;
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fail:
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netif_err(efx, hw, efx->net_dev,
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"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));
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return -EIO;
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}
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/**************************************************************************
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*
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* Special buffer handling
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* Special buffers are used for event queues and the TX and RX
|
* descriptor rings.
|
*
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*************************************************************************/
|
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/*
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* Initialise a special buffer
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*
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* This will define a buffer (previously allocated via
|
* efx_alloc_special_buffer()) in the buffer table, allowing
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* it to be used for event queues, descriptor rings etc.
|
*/
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static void
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efx_init_special_buffer(struct efx_nic *efx, struct efx_special_buffer *buffer)
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{
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efx_qword_t buf_desc;
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unsigned int index;
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dma_addr_t dma_addr;
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int i;
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EFX_WARN_ON_PARANOID(!buffer->buf.addr);
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/* Write buffer descriptors to NIC */
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for (i = 0; i < buffer->entries; i++) {
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index = buffer->index + i;
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dma_addr = buffer->buf.dma_addr + (i * EFX_BUF_SIZE);
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netif_dbg(efx, probe, efx->net_dev,
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"mapping special buffer %d at %llx\n",
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index, (unsigned long long)dma_addr);
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EFX_POPULATE_QWORD_3(buf_desc,
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FRF_AZ_BUF_ADR_REGION, 0,
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FRF_AZ_BUF_ADR_FBUF, dma_addr >> 12,
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FRF_AZ_BUF_OWNER_ID_FBUF, 0);
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efx_write_buf_tbl(efx, &buf_desc, index);
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}
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}
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/* Unmaps a buffer and clears the buffer table entries */
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static void
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efx_fini_special_buffer(struct efx_nic *efx, struct efx_special_buffer *buffer)
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{
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efx_oword_t buf_tbl_upd;
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unsigned int start = buffer->index;
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unsigned int end = (buffer->index + buffer->entries - 1);
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if (!buffer->entries)
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return;
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netif_dbg(efx, hw, efx->net_dev, "unmapping special buffers %d-%d\n",
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buffer->index, buffer->index + buffer->entries - 1);
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EFX_POPULATE_OWORD_4(buf_tbl_upd,
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FRF_AZ_BUF_UPD_CMD, 0,
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FRF_AZ_BUF_CLR_CMD, 1,
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FRF_AZ_BUF_CLR_END_ID, end,
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FRF_AZ_BUF_CLR_START_ID, start);
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efx_writeo(efx, &buf_tbl_upd, FR_AZ_BUF_TBL_UPD);
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}
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/*
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* Allocate a new special buffer
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*
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* This allocates memory for a new buffer, clears it and allocates a
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* new buffer ID range. It does not write into the buffer table.
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*
|
* This call will allocate 4KB buffers, since 8KB buffers can't be
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* used for event queues and descriptor rings.
|
*/
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static int efx_alloc_special_buffer(struct efx_nic *efx,
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struct efx_special_buffer *buffer,
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unsigned int len)
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{
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#ifdef CONFIG_SFC_SRIOV
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struct siena_nic_data *nic_data = efx->nic_data;
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#endif
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len = ALIGN(len, EFX_BUF_SIZE);
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if (efx_nic_alloc_buffer(efx, &buffer->buf, len, GFP_KERNEL))
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return -ENOMEM;
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buffer->entries = len / EFX_BUF_SIZE;
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BUG_ON(buffer->buf.dma_addr & (EFX_BUF_SIZE - 1));
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/* Select new buffer ID */
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buffer->index = efx->next_buffer_table;
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efx->next_buffer_table += buffer->entries;
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#ifdef CONFIG_SFC_SRIOV
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BUG_ON(efx_siena_sriov_enabled(efx) &&
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nic_data->vf_buftbl_base < efx->next_buffer_table);
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#endif
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netif_dbg(efx, probe, efx->net_dev,
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"allocating special buffers %d-%d at %llx+%x "
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"(virt %p phys %llx)\n", buffer->index,
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buffer->index + buffer->entries - 1,
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(u64)buffer->buf.dma_addr, len,
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buffer->buf.addr, (u64)virt_to_phys(buffer->buf.addr));
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return 0;
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}
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static void
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efx_free_special_buffer(struct efx_nic *efx, struct efx_special_buffer *buffer)
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{
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if (!buffer->buf.addr)
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return;
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netif_dbg(efx, hw, efx->net_dev,
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"deallocating special buffers %d-%d at %llx+%x "
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"(virt %p phys %llx)\n", buffer->index,
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buffer->index + buffer->entries - 1,
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(u64)buffer->buf.dma_addr, buffer->buf.len,
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buffer->buf.addr, (u64)virt_to_phys(buffer->buf.addr));
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efx_nic_free_buffer(efx, &buffer->buf);
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buffer->entries = 0;
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}
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/**************************************************************************
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*
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* TX path
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*
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**************************************************************************/
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/* This writes to the TX_DESC_WPTR; write pointer for TX descriptor ring */
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static inline void efx_farch_notify_tx_desc(struct efx_tx_queue *tx_queue)
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{
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unsigned write_ptr;
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efx_dword_t reg;
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write_ptr = tx_queue->write_count & tx_queue->ptr_mask;
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EFX_POPULATE_DWORD_1(reg, FRF_AZ_TX_DESC_WPTR_DWORD, write_ptr);
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efx_writed_page(tx_queue->efx, ®,
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FR_AZ_TX_DESC_UPD_DWORD_P0, tx_queue->queue);
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}
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/* Write pointer and first descriptor for TX descriptor ring */
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static inline void efx_farch_push_tx_desc(struct efx_tx_queue *tx_queue,
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const efx_qword_t *txd)
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{
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unsigned write_ptr;
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efx_oword_t reg;
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BUILD_BUG_ON(FRF_AZ_TX_DESC_LBN != 0);
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BUILD_BUG_ON(FR_AA_TX_DESC_UPD_KER != FR_BZ_TX_DESC_UPD_P0);
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write_ptr = tx_queue->write_count & tx_queue->ptr_mask;
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EFX_POPULATE_OWORD_2(reg, FRF_AZ_TX_DESC_PUSH_CMD, true,
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FRF_AZ_TX_DESC_WPTR, write_ptr);
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reg.qword[0] = *txd;
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efx_writeo_page(tx_queue->efx, ®,
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FR_BZ_TX_DESC_UPD_P0, tx_queue->queue);
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}
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|
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/* For each entry inserted into the software descriptor ring, create a
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* descriptor in the hardware TX descriptor ring (in host memory), and
|
* write a doorbell.
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*/
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void efx_farch_tx_write(struct efx_tx_queue *tx_queue)
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{
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struct efx_tx_buffer *buffer;
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efx_qword_t *txd;
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unsigned write_ptr;
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unsigned old_write_count = tx_queue->write_count;
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|
tx_queue->xmit_pending = false;
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if (unlikely(tx_queue->write_count == tx_queue->insert_count))
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return;
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do {
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write_ptr = tx_queue->write_count & tx_queue->ptr_mask;
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buffer = &tx_queue->buffer[write_ptr];
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txd = efx_tx_desc(tx_queue, write_ptr);
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++tx_queue->write_count;
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EFX_WARN_ON_ONCE_PARANOID(buffer->flags & EFX_TX_BUF_OPTION);
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/* Create TX descriptor ring entry */
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BUILD_BUG_ON(EFX_TX_BUF_CONT != 1);
|
EFX_POPULATE_QWORD_4(*txd,
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FSF_AZ_TX_KER_CONT,
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buffer->flags & EFX_TX_BUF_CONT,
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FSF_AZ_TX_KER_BYTE_COUNT, buffer->len,
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FSF_AZ_TX_KER_BUF_REGION, 0,
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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)) {
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txd = efx_tx_desc(tx_queue,
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old_write_count & tx_queue->ptr_mask);
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efx_farch_push_tx_desc(tx_queue, txd);
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++tx_queue->pushes;
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} else {
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efx_farch_notify_tx_desc(tx_queue);
|
}
|
}
|
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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;
|
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len = min(limit, len);
|
|
return len;
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}
|
|
|
/* 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) |
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((tx_queue->label & 2) ? EFX_TXQ_TYPE_HIGHPRI : 0);
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entries = tx_queue->ptr_mask + 1;
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return efx_alloc_special_buffer(efx, &tx_queue->txd,
|
entries * sizeof(efx_qword_t));
|
}
|
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void efx_farch_tx_init(struct efx_tx_queue *tx_queue)
|
{
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int csum = tx_queue->type & EFX_TXQ_TYPE_OUTER_CSUM;
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struct efx_nic *efx = tx_queue->efx;
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efx_oword_t reg;
|
|
/* Pin TX descriptor ring */
|
efx_init_special_buffer(efx, &tx_queue->txd);
|
|
/* Push TX descriptor ring to card */
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EFX_POPULATE_OWORD_10(reg,
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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,
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FRF_AZ_TX_DESCQ_OWNER_ID, 0,
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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, ®, 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, ®, 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, ®, 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, ®,
|
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, ®, 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, ®, 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, ®, efx->type->evq_ptr_tbl_base,
|
channel->channel);
|
efx_writeo_table(efx, ®, 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, ®, 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, ®, 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);
|
}
|
