/* SPDX-License-Identifier: GPL-2.0-only */
/****************************************************************************
* Driver for Solarflare network controllers and boards
* Copyright 2005 - 2006 Fen Systems Ltd .
* Copyright 2006 - 2013 Solarflare Communications Inc .
*/
#ifndef EF4_NIC_H
#define EF4_NIC_H
#include <linux/net_tstamp.h>
#include <linux/i2c-algo-bit.h>
#include "net_driver.h"
#include "efx.h"
enum {
EF4_REV_FALCON_A0 = 0 ,
EF4_REV_FALCON_A1 = 1 ,
EF4_REV_FALCON_B0 = 2 ,
};
static inline int ef4_nic_rev(struct ef4_nic *efx)
{
return efx->type->revision;
}
u32 ef4_farch_fpga_ver(struct ef4_nic *efx);
/* NIC has two interlinked PCI functions for the same port. */
static inline bool ef4_nic_is_dual_func(struct ef4_nic *efx)
{
return ef4_nic_rev(efx) < EF4_REV_FALCON_B0;
}
/* Read the current event from the event queue */
static inline ef4_qword_t *ef4_event(struct ef4_channel *channel,
unsigned int index)
{
return ((ef4_qword_t *) (channel->eventq.buf.addr)) +
(index & channel->eventq_mask);
}
/* See if an event is present
*
* We check both the high and low dword of the event for all ones . We
* wrote all ones when we cleared the event , and no valid event can
* have all ones in either its high or low dwords . This approach is
* robust against reordering .
*
* Note that using a single 64 - bit comparison is incorrect ; even
* though the CPU read will be atomic , the DMA write may not be .
*/
static inline int ef4_event_present(ef4_qword_t *event)
{
return !(EF4_DWORD_IS_ALL_ONES(event->dword[0 ]) |
EF4_DWORD_IS_ALL_ONES(event->dword[1 ]));
}
/* Returns a pointer to the specified transmit descriptor in the TX
* descriptor queue belonging to the specified channel .
*/
static inline ef4_qword_t *
ef4_tx_desc(struct ef4_tx_queue *tx_queue, unsigned int index)
{
return ((ef4_qword_t *) (tx_queue->txd.buf.addr)) + index;
}
/* Get partner of a TX queue, seen as part of the same net core queue */
static inline struct ef4_tx_queue *ef4_tx_queue_partner(struct ef4_tx_queue *tx_queue)
{
if (tx_queue->queue & EF4_TXQ_TYPE_OFFLOAD)
return tx_queue - EF4_TXQ_TYPE_OFFLOAD;
else
return tx_queue + EF4_TXQ_TYPE_OFFLOAD;
}
/* Report whether this TX queue would be empty for the given write_count.
* May return false negative .
*/
static inline bool __ef4_nic_tx_is_empty(struct ef4_tx_queue *tx_queue,
unsigned int write_count)
{
unsigned int empty_read_count = READ_ONCE(tx_queue->empty_read_count);
if (empty_read_count == 0 )
return false ;
return ((empty_read_count ^ write_count) & ~EF4_EMPTY_COUNT_VALID) == 0 ;
}
/* Decide whether to push a TX descriptor to the NIC vs merely writing
* the doorbell . This can reduce latency when we are adding a single
* descriptor to an empty queue , but is otherwise pointless . Further ,
* Falcon and Siena have hardware bugs ( SF bug 33851 ) that may be
* triggered if we don ' t check this .
* We use the write_count used for the last doorbell push , to get the
* NIC ' s view of the tx queue .
*/
static inline bool ef4_nic_may_push_tx_desc(struct ef4_tx_queue *tx_queue,
unsigned int write_count)
{
bool was_empty = __ef4_nic_tx_is_empty(tx_queue, write_count);
tx_queue->empty_read_count = 0 ;
return was_empty && tx_queue->write_count - write_count == 1 ;
}
/* Returns a pointer to the specified descriptor in the RX descriptor queue */
static inline ef4_qword_t *
ef4_rx_desc(struct ef4_rx_queue *rx_queue, unsigned int index)
{
return ((ef4_qword_t *) (rx_queue->rxd.buf.addr)) + index;
}
enum {
PHY_TYPE_NONE = 0 ,
PHY_TYPE_TXC43128 = 1 ,
PHY_TYPE_88E1111 = 2 ,
PHY_TYPE_SFX7101 = 3 ,
PHY_TYPE_QT2022C2 = 4 ,
PHY_TYPE_PM8358 = 6 ,
PHY_TYPE_SFT9001A = 8 ,
PHY_TYPE_QT2025C = 9 ,
PHY_TYPE_SFT9001B = 10 ,
};
#define FALCON_XMAC_LOOPBACKS \
((1 << LOOPBACK_XGMII) | \
(1 << LOOPBACK_XGXS) | \
(1 << LOOPBACK_XAUI))
/* Alignment of PCIe DMA boundaries (4KB) */
#define EF4_PAGE_SIZE 4096
/* Size and alignment of buffer table entries (same) */
#define EF4_BUF_SIZE EF4_PAGE_SIZE
/* NIC-generic software stats */
enum {
GENERIC_STAT_rx_noskb_drops,
GENERIC_STAT_rx_nodesc_trunc,
GENERIC_STAT_COUNT
};
/**
* struct falcon_board_type - board operations and type information
* @ id : Board type id , as found in NVRAM
* @ init : Allocate resources and initialise peripheral hardware
* @ init_phy : Do board - specific PHY initialisation
* @ fini : Shut down hardware and free resources
* @ set_id_led : Set state of identifying LED or revert to automatic function
* @ monitor : Board - specific health check function
*/
struct falcon_board_type {
u8 id;
int (*init) (struct ef4_nic *nic);
void (*init_phy) (struct ef4_nic *efx);
void (*fini) (struct ef4_nic *nic);
void (*set_id_led) (struct ef4_nic *efx, enum ef4_led_mode mode);
int (*monitor) (struct ef4_nic *nic);
};
/**
* struct falcon_board - board information
* @ type : Type of board
* @ major : Major rev . ( ' A ' , ' B ' . . . )
* @ minor : Minor rev . ( 0 , 1 , . . . )
* @ i2c_adap : I2C adapter for on - board peripherals
* @ i2c_data : Data for bit - banging algorithm
* @ hwmon_client : I2C client for hardware monitor
* @ ioexp_client : I2C client for power / port control
*/
struct falcon_board {
const struct falcon_board_type *type;
int major;
int minor;
struct i2c_adapter i2c_adap;
struct i2c_algo_bit_data i2c_data;
struct i2c_client *hwmon_client, *ioexp_client;
};
/**
* struct falcon_spi_device - a Falcon SPI ( Serial Peripheral Interface ) device
* @ device_id : Controller ' s id for the device
* @ size : Size ( in bytes )
* @ addr_len : Number of address bytes in read / write commands
* @ munge_address : Flag whether addresses should be munged .
* Some devices with 9 - bit addresses ( e . g . AT25040A EEPROM )
* use bit 3 of the command byte as address bit A8 , rather
* than having a two - byte address . If this flag is set , then
* commands should be munged in this way .
* @ erase_command : Erase command ( or 0 if sector erase not needed ) .
* @ erase_size : Erase sector size ( in bytes )
* Erase commands affect sectors with this size and alignment .
* This must be a power of two .
* @ block_size : Write block size ( in bytes ) .
* Write commands are limited to blocks with this size and alignment .
*/
struct falcon_spi_device {
int device_id;
unsigned int size;
unsigned int addr_len;
unsigned int munge_address:1 ;
u8 erase_command;
unsigned int erase_size;
unsigned int block_size;
};
static inline bool falcon_spi_present(const struct falcon_spi_device *spi)
{
return spi->size != 0 ;
}
enum {
FALCON_STAT_tx_bytes = GENERIC_STAT_COUNT,
FALCON_STAT_tx_packets,
FALCON_STAT_tx_pause,
FALCON_STAT_tx_control,
FALCON_STAT_tx_unicast,
FALCON_STAT_tx_multicast,
FALCON_STAT_tx_broadcast,
FALCON_STAT_tx_lt64,
FALCON_STAT_tx_64,
FALCON_STAT_tx_65_to_127,
FALCON_STAT_tx_128_to_255,
FALCON_STAT_tx_256_to_511,
FALCON_STAT_tx_512_to_1023,
FALCON_STAT_tx_1024_to_15xx,
FALCON_STAT_tx_15xx_to_jumbo,
FALCON_STAT_tx_gtjumbo,
FALCON_STAT_tx_non_tcpudp,
FALCON_STAT_tx_mac_src_error,
FALCON_STAT_tx_ip_src_error,
FALCON_STAT_rx_bytes,
FALCON_STAT_rx_good_bytes,
FALCON_STAT_rx_bad_bytes,
FALCON_STAT_rx_packets,
FALCON_STAT_rx_good,
FALCON_STAT_rx_bad,
FALCON_STAT_rx_pause,
FALCON_STAT_rx_control,
FALCON_STAT_rx_unicast,
FALCON_STAT_rx_multicast,
FALCON_STAT_rx_broadcast,
FALCON_STAT_rx_lt64,
FALCON_STAT_rx_64,
FALCON_STAT_rx_65_to_127,
FALCON_STAT_rx_128_to_255,
FALCON_STAT_rx_256_to_511,
FALCON_STAT_rx_512_to_1023,
FALCON_STAT_rx_1024_to_15xx,
FALCON_STAT_rx_15xx_to_jumbo,
FALCON_STAT_rx_gtjumbo,
FALCON_STAT_rx_bad_lt64,
FALCON_STAT_rx_bad_gtjumbo,
FALCON_STAT_rx_overflow,
FALCON_STAT_rx_symbol_error,
FALCON_STAT_rx_align_error,
FALCON_STAT_rx_length_error,
FALCON_STAT_rx_internal_error,
FALCON_STAT_rx_nodesc_drop_cnt,
FALCON_STAT_COUNT
};
/**
* struct falcon_nic_data - Falcon NIC state
* @ pci_dev2 : Secondary function of Falcon A
* @ efx : ef4_nic pointer
* @ board : Board state and functions
* @ stats : Hardware statistics
* @ stats_disable_count : Nest count for disabling statistics fetches
* @ stats_pending : Is there a pending DMA of MAC statistics .
* @ stats_timer : A timer for regularly fetching MAC statistics .
* @ spi_flash : SPI flash device
* @ spi_eeprom : SPI EEPROM device
* @ spi_lock : SPI bus lock
* @ mdio_lock : MDIO bus lock
* @ xmac_poll_required : XMAC link state needs polling
*/
struct falcon_nic_data {
struct pci_dev *pci_dev2;
struct ef4_nic *efx;
struct falcon_board board;
u64 stats[FALCON_STAT_COUNT];
unsigned int stats_disable_count;
bool stats_pending;
struct timer_list stats_timer;
struct falcon_spi_device spi_flash;
struct falcon_spi_device spi_eeprom;
struct mutex spi_lock;
struct mutex mdio_lock;
bool xmac_poll_required;
};
static inline struct falcon_board *falcon_board(struct ef4_nic *efx)
{
struct falcon_nic_data *data = efx->nic_data;
return &data->board;
}
struct kernel_ethtool_ts_info;
extern const struct ef4_nic_type falcon_a1_nic_type;
extern const struct ef4_nic_type falcon_b0_nic_type;
/**************************************************************************
*
* Externs
*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*/
int falcon_probe_board(struct ef4_nic *efx, u16 revision_info);
/* TX data path */
static inline int ef4_nic_probe_tx(struct ef4_tx_queue *tx_queue)
{
return tx_queue->efx->type->tx_probe(tx_queue);
}
static inline void ef4_nic_init_tx(struct ef4_tx_queue *tx_queue)
{
tx_queue->efx->type->tx_init(tx_queue);
}
static inline void ef4_nic_remove_tx(struct ef4_tx_queue *tx_queue)
{
tx_queue->efx->type->tx_remove(tx_queue);
}
static inline void ef4_nic_push_buffers(struct ef4_tx_queue *tx_queue)
{
tx_queue->efx->type->tx_write(tx_queue);
}
/* RX data path */
static inline int ef4_nic_probe_rx(struct ef4_rx_queue *rx_queue)
{
return rx_queue->efx->type->rx_probe(rx_queue);
}
static inline void ef4_nic_init_rx(struct ef4_rx_queue *rx_queue)
{
rx_queue->efx->type->rx_init(rx_queue);
}
static inline void ef4_nic_remove_rx(struct ef4_rx_queue *rx_queue)
{
rx_queue->efx->type->rx_remove(rx_queue);
}
static inline void ef4_nic_notify_rx_desc(struct ef4_rx_queue *rx_queue)
{
rx_queue->efx->type->rx_write(rx_queue);
}
static inline void ef4_nic_generate_fill_event(struct ef4_rx_queue *rx_queue)
{
rx_queue->efx->type->rx_defer_refill(rx_queue);
}
/* Event data path */
static inline int ef4_nic_probe_eventq(struct ef4_channel *channel)
{
return channel->efx->type->ev_probe(channel);
}
static inline int ef4_nic_init_eventq(struct ef4_channel *channel)
{
return channel->efx->type->ev_init(channel);
}
static inline void ef4_nic_fini_eventq(struct ef4_channel *channel)
{
channel->efx->type->ev_fini(channel);
}
static inline void ef4_nic_remove_eventq(struct ef4_channel *channel)
{
channel->efx->type->ev_remove(channel);
}
static inline int
ef4_nic_process_eventq(struct ef4_channel *channel, int quota)
{
return channel->efx->type->ev_process(channel, quota);
}
static inline void ef4_nic_eventq_read_ack(struct ef4_channel *channel)
{
channel->efx->type->ev_read_ack(channel);
}
void ef4_nic_event_test_start(struct ef4_channel *channel);
/* queue operations */
int ef4_farch_tx_probe(struct ef4_tx_queue *tx_queue);
void ef4_farch_tx_init(struct ef4_tx_queue *tx_queue);
void ef4_farch_tx_fini(struct ef4_tx_queue *tx_queue);
void ef4_farch_tx_remove(struct ef4_tx_queue *tx_queue);
void ef4_farch_tx_write(struct ef4_tx_queue *tx_queue);
unsigned int ef4_farch_tx_limit_len(struct ef4_tx_queue *tx_queue,
dma_addr_t dma_addr, unsigned int len);
int ef4_farch_rx_probe(struct ef4_rx_queue *rx_queue);
void ef4_farch_rx_init(struct ef4_rx_queue *rx_queue);
void ef4_farch_rx_fini(struct ef4_rx_queue *rx_queue);
void ef4_farch_rx_remove(struct ef4_rx_queue *rx_queue);
void ef4_farch_rx_write(struct ef4_rx_queue *rx_queue);
void ef4_farch_rx_defer_refill(struct ef4_rx_queue *rx_queue);
int ef4_farch_ev_probe(struct ef4_channel *channel);
int ef4_farch_ev_init(struct ef4_channel *channel);
void ef4_farch_ev_fini(struct ef4_channel *channel);
void ef4_farch_ev_remove(struct ef4_channel *channel);
int ef4_farch_ev_process(struct ef4_channel *channel, int quota);
void ef4_farch_ev_read_ack(struct ef4_channel *channel);
void ef4_farch_ev_test_generate(struct ef4_channel *channel);
/* filter operations */
int ef4_farch_filter_table_probe(struct ef4_nic *efx);
void ef4_farch_filter_table_restore(struct ef4_nic *efx);
void ef4_farch_filter_table_remove(struct ef4_nic *efx);
void ef4_farch_filter_update_rx_scatter(struct ef4_nic *efx);
s32 ef4_farch_filter_insert(struct ef4_nic *efx, struct ef4_filter_spec *spec,
bool replace);
int ef4_farch_filter_remove_safe(struct ef4_nic *efx,
enum ef4_filter_priority priority,
u32 filter_id);
int ef4_farch_filter_get_safe(struct ef4_nic *efx,
enum ef4_filter_priority priority, u32 filter_id,
struct ef4_filter_spec *);
int ef4_farch_filter_clear_rx(struct ef4_nic *efx,
enum ef4_filter_priority priority);
u32 ef4_farch_filter_count_rx_used(struct ef4_nic *efx,
enum ef4_filter_priority priority);
u32 ef4_farch_filter_get_rx_id_limit(struct ef4_nic *efx);
s32 ef4_farch_filter_get_rx_ids(struct ef4_nic *efx,
enum ef4_filter_priority priority, u32 *buf,
u32 size);
#ifdef CONFIG_RFS_ACCEL
s32 ef4_farch_filter_rfs_insert(struct ef4_nic *efx,
struct ef4_filter_spec *spec);
bool ef4_farch_filter_rfs_expire_one(struct ef4_nic *efx, u32 flow_id,
unsigned int index);
#endif
void ef4_farch_filter_sync_rx_mode(struct ef4_nic *efx);
bool ef4_nic_event_present(struct ef4_channel *channel);
/* Some statistics are computed as A - B where A and B each increase
* linearly with some hardware counter ( s ) and the counters are read
* asynchronously . If the counters contributing to B are always read
* after those contributing to A , the computed value may be lower than
* the true value by some variable amount , and may decrease between
* subsequent computations .
*
* We should never allow statistics to decrease or to exceed the true
* value . Since the computed value will never be greater than the
* true value , we can achieve this by only storing the computed value
* when it increases .
*/
static inline void ef4_update_diff_stat(u64 *stat, u64 diff)
{
if ((s64)(diff - *stat) > 0 )
*stat = diff;
}
/* Interrupts */
int ef4_nic_init_interrupt(struct ef4_nic *efx);
int ef4_nic_irq_test_start(struct ef4_nic *efx);
void ef4_nic_fini_interrupt(struct ef4_nic *efx);
void ef4_farch_irq_enable_master(struct ef4_nic *efx);
int ef4_farch_irq_test_generate(struct ef4_nic *efx);
void ef4_farch_irq_disable_master(struct ef4_nic *efx);
irqreturn_t ef4_farch_msi_interrupt(int irq, void *dev_id);
irqreturn_t ef4_farch_legacy_interrupt(int irq, void *dev_id);
irqreturn_t ef4_farch_fatal_interrupt(struct ef4_nic *efx);
static inline int ef4_nic_event_test_irq_cpu(struct ef4_channel *channel)
{
return READ_ONCE(channel->event_test_cpu);
}
static inline int ef4_nic_irq_test_irq_cpu(struct ef4_nic *efx)
{
return READ_ONCE(efx->last_irq_cpu);
}
/* Global Resources */
int ef4_nic_flush_queues(struct ef4_nic *efx);
int ef4_farch_fini_dmaq(struct ef4_nic *efx);
void ef4_farch_finish_flr(struct ef4_nic *efx);
void falcon_start_nic_stats(struct ef4_nic *efx);
void falcon_stop_nic_stats(struct ef4_nic *efx);
int falcon_reset_xaui(struct ef4_nic *efx);
void ef4_farch_init_common(struct ef4_nic *efx);
void ef4_farch_rx_push_indir_table(struct ef4_nic *efx);
int ef4_nic_alloc_buffer(struct ef4_nic *efx, struct ef4_buffer *buffer,
unsigned int len, gfp_t gfp_flags);
void ef4_nic_free_buffer(struct ef4_nic *efx, struct ef4_buffer *buffer);
/* Tests */
struct ef4_farch_register_test {
unsigned address;
ef4_oword_t mask;
};
int ef4_farch_test_registers(struct ef4_nic *efx,
const struct ef4_farch_register_test *regs,
size_t n_regs);
size_t ef4_nic_get_regs_len(struct ef4_nic *efx);
void ef4_nic_get_regs(struct ef4_nic *efx, void *buf);
size_t ef4_nic_describe_stats(const struct ef4_hw_stat_desc *desc, size_t count,
const unsigned long *mask, u8 **names);
void ef4_nic_update_stats(const struct ef4_hw_stat_desc *desc, size_t count,
const unsigned long *mask, u64 *stats,
const void *dma_buf, bool accumulate);
void ef4_farch_generate_event(struct ef4_nic *efx, unsigned int evq,
ef4_qword_t *event);
#endif /* EF4_NIC_H */
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