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linux/drivers/net/sfc/falcon.h
Steve Hodgson fdaa9aed21 sfc: Simplify PHY polling 
Falcon can generate events for LASI interrupts from the PHY, but in
practice we have never implemented this in reference designs.  Instead
we have polled, inserted the appropriate events, and then handled the
events later.  This is a waste of time and code.

Instead, make PHY poll functions update the link state synchronously
and report whether it changed.  We can still make use of the LASI
registers as a shortcut on the SFT9001.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-28 23:58:50 -08:00

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/****************************************************************************
* Driver for Solarflare Solarstorm network controllers and boards
* Copyright 2005-2006 Fen Systems Ltd.
* Copyright 2006-2008 Solarflare Communications Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation, incorporated herein by reference.
*/
#ifndef EFX_FALCON_H
#define EFX_FALCON_H
#include <linux/i2c-algo-bit.h>
#include "net_driver.h"
#include "efx.h"
/*
* Falcon hardware control
*/
enum falcon_revision {
FALCON_REV_A0 = 0,
FALCON_REV_A1 = 1,
FALCON_REV_B0 = 2,
};
static inline int falcon_rev(struct efx_nic *efx)
{
return efx->pci_dev->revision;
}
/**
* struct falcon_board_type - board operations and type information
* @id: Board type id, as found in NVRAM
* @ref_model: Model number of Solarflare reference design
* @gen_type: Generic board type description
* @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;
const char *ref_model;
const char *gen_type;
int (*init) (struct efx_nic *nic);
void (*init_phy) (struct efx_nic *efx);
void (*fini) (struct efx_nic *nic);
void (*set_id_led) (struct efx_nic *efx, enum efx_led_mode mode);
int (*monitor) (struct efx_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_nic_data - Falcon NIC state
* @pci_dev2: Secondary function of Falcon A
* @board: Board state and functions
* @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.
* @stats_dma_done: Pointer to the flag which indicates DMA completion.
*/
struct falcon_nic_data {
struct pci_dev *pci_dev2;
struct falcon_board board;
unsigned int stats_disable_count;
bool stats_pending;
struct timer_list stats_timer;
u32 *stats_dma_done;
};
static inline struct falcon_board *falcon_board(struct efx_nic *efx)
{
struct falcon_nic_data *data = efx->nic_data;
return &data->board;
}
extern struct efx_nic_type falcon_a_nic_type;
extern struct efx_nic_type falcon_b_nic_type;
/**************************************************************************
*
* Externs
*
**************************************************************************
*/
extern void falcon_probe_board(struct efx_nic *efx, u16 revision_info);
/* TX data path */
extern int falcon_probe_tx(struct efx_tx_queue *tx_queue);
extern void falcon_init_tx(struct efx_tx_queue *tx_queue);
extern void falcon_fini_tx(struct efx_tx_queue *tx_queue);
extern void falcon_remove_tx(struct efx_tx_queue *tx_queue);
extern void falcon_push_buffers(struct efx_tx_queue *tx_queue);
/* RX data path */
extern int falcon_probe_rx(struct efx_rx_queue *rx_queue);
extern void falcon_init_rx(struct efx_rx_queue *rx_queue);
extern void falcon_fini_rx(struct efx_rx_queue *rx_queue);
extern void falcon_remove_rx(struct efx_rx_queue *rx_queue);
extern void falcon_notify_rx_desc(struct efx_rx_queue *rx_queue);
/* Event data path */
extern int falcon_probe_eventq(struct efx_channel *channel);
extern void falcon_init_eventq(struct efx_channel *channel);
extern void falcon_fini_eventq(struct efx_channel *channel);
extern void falcon_remove_eventq(struct efx_channel *channel);
extern int falcon_process_eventq(struct efx_channel *channel, int rx_quota);
extern void falcon_eventq_read_ack(struct efx_channel *channel);
/* Ports */
extern int falcon_probe_port(struct efx_nic *efx);
extern void falcon_remove_port(struct efx_nic *efx);
/* MAC/PHY */
extern int falcon_switch_mac(struct efx_nic *efx);
extern bool falcon_xaui_link_ok(struct efx_nic *efx);
extern void falcon_drain_tx_fifo(struct efx_nic *efx);
extern void falcon_deconfigure_mac_wrapper(struct efx_nic *efx);
extern void falcon_reconfigure_mac_wrapper(struct efx_nic *efx);
/* Interrupts and test events */
extern int falcon_init_interrupt(struct efx_nic *efx);
extern void falcon_enable_interrupts(struct efx_nic *efx);
extern void falcon_generate_test_event(struct efx_channel *channel,
unsigned int magic);
extern void falcon_generate_interrupt(struct efx_nic *efx);
extern void falcon_set_int_moderation(struct efx_channel *channel);
extern void falcon_disable_interrupts(struct efx_nic *efx);
extern void falcon_fini_interrupt(struct efx_nic *efx);
#define FALCON_IRQ_MOD_RESOLUTION 5
/* Global Resources */
extern int falcon_probe_nic(struct efx_nic *efx);
extern int falcon_init_nic(struct efx_nic *efx);
extern int falcon_flush_queues(struct efx_nic *efx);
extern int falcon_reset_hw(struct efx_nic *efx, enum reset_type method);
extern void falcon_monitor(struct efx_nic *efx);
extern void falcon_remove_nic(struct efx_nic *efx);
extern void falcon_update_nic_stats(struct efx_nic *efx);
extern void falcon_start_nic_stats(struct efx_nic *efx);
extern void falcon_stop_nic_stats(struct efx_nic *efx);
extern void falcon_push_multicast_hash(struct efx_nic *efx);
extern int falcon_reset_xaui(struct efx_nic *efx);
/* Tests */
struct falcon_nvconfig;
extern int falcon_read_nvram(struct efx_nic *efx,
struct falcon_nvconfig *nvconfig);
extern int falcon_test_registers(struct efx_nic *efx);
/**************************************************************************
*
* Falcon MAC stats
*
**************************************************************************
*/
#define FALCON_STAT_OFFSET(falcon_stat) EFX_VAL(falcon_stat, offset)
#define FALCON_STAT_WIDTH(falcon_stat) EFX_VAL(falcon_stat, WIDTH)
/* Retrieve statistic from statistics block */
#define FALCON_STAT(efx, falcon_stat, efx_stat) do { \
if (FALCON_STAT_WIDTH(falcon_stat) == 16) \
(efx)->mac_stats.efx_stat += le16_to_cpu( \
*((__force __le16 *) \
(efx->stats_buffer.addr + \
FALCON_STAT_OFFSET(falcon_stat)))); \
else if (FALCON_STAT_WIDTH(falcon_stat) == 32) \
(efx)->mac_stats.efx_stat += le32_to_cpu( \
*((__force __le32 *) \
(efx->stats_buffer.addr + \
FALCON_STAT_OFFSET(falcon_stat)))); \
else \
(efx)->mac_stats.efx_stat += le64_to_cpu( \
*((__force __le64 *) \
(efx->stats_buffer.addr + \
FALCON_STAT_OFFSET(falcon_stat)))); \
} while (0)
#define FALCON_MAC_STATS_SIZE 0x100
#define MAC_DATA_LBN 0
#define MAC_DATA_WIDTH 32
extern void falcon_generate_event(struct efx_channel *channel,
efx_qword_t *event);
extern void falcon_poll_xmac(struct efx_nic *efx);
#endif /* EFX_FALCON_H */
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