s2io.c

linux 内核源代码

/************************************************************************
 * s2io.c: A Linux PCI-X Ethernet driver for Neterion 10GbE Server NIC
 * Copyright(c) 2002-2007 Neterion Inc.

 * This software may be used and distributed according to the terms of
 * the GNU General Public License (GPL), incorporated herein by reference.
 * Drivers based on or derived from this code fall under the GPL and must
 * retain the authorship, copyright and license notice.  This file is not
 * a complete program and may only be used when the entire operating
 * system is licensed under the GPL.
 * See the file COPYING in this distribution for more information.
 *
 * Credits:
 * Jeff Garzik		: For pointing out the improper error condition
 *			  check in the s2io_xmit routine and also some
 *			  issues in the Tx watch dog function. Also for
 *			  patiently answering all those innumerable
 *			  questions regaring the 2.6 porting issues.
 * Stephen Hemminger	: Providing proper 2.6 porting mechanism for some
 *			  macros available only in 2.6 Kernel.
 * Francois Romieu	: For pointing out all code part that were
 *			  deprecated and also styling related comments.
 * Grant Grundler	: For helping me get rid of some Architecture
 *			  dependent code.
 * Christopher Hellwig	: Some more 2.6 specific issues in the driver.
 *
 * The module loadable parameters that are supported by the driver and a brief
 * explaination of all the variables.
 *
 * rx_ring_num : This can be used to program the number of receive rings used
 * in the driver.
 * rx_ring_sz: This defines the number of receive blocks each ring can have.
 *     This is also an array of size 8.
 * rx_ring_mode: This defines the operation mode of all 8 rings. The valid
 *		values are 1, 2.
 * tx_fifo_num: This defines the number of Tx FIFOs thats used int the driver.
 * tx_fifo_len: This too is an array of 8. Each element defines the number of
 * Tx descriptors that can be associated with each corresponding FIFO.
 * intr_type: This defines the type of interrupt. The values can be 0(INTA),
 *     2(MSI_X). Default value is '2(MSI_X)'
 * lro_enable: Specifies whether to enable Large Receive Offload (LRO) or not.
 *     Possible values '1' for enable '0' for disable. Default is '0'
 * lro_max_pkts: This parameter defines maximum number of packets can be
 *     aggregated as a single large packet
 * napi: This parameter used to enable/disable NAPI (polling Rx)
 *     Possible values '1' for enable and '0' for disable. Default is '1'
 * ufo: This parameter used to enable/disable UDP Fragmentation Offload(UFO)
 *      Possible values '1' for enable and '0' for disable. Default is '0'
 * vlan_tag_strip: This can be used to enable or disable vlan stripping.
 *                 Possible values '1' for enable , '0' for disable.
 *                 Default is '2' - which means disable in promisc mode
 *                 and enable in non-promiscuous mode.
 ************************************************************************/

#include <linux/module.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/stddef.h>
#include <linux/ioctl.h>
#include <linux/timex.h>
#include <linux/ethtool.h>
#include <linux/workqueue.h>
#include <linux/if_vlan.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <net/tcp.h>

#include <asm/system.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/div64.h>
#include <asm/irq.h>

/* local include */
#include "s2io.h"
#include "s2io-regs.h"

#define DRV_VERSION "2.0.26.17"

/* S2io Driver name & version. */
static char s2io_driver_name[] = "Neterion";
static char s2io_driver_version[] = DRV_VERSION;

static int rxd_size[2] = {32,48};
static int rxd_count[2] = {127,85};

static inline int RXD_IS_UP2DT(struct RxD_t *rxdp)
{
	int ret;

	ret = ((!(rxdp->Control_1 & RXD_OWN_XENA)) &&
		(GET_RXD_MARKER(rxdp->Control_2) != THE_RXD_MARK));

	return ret;
}

/*
 * Cards with following subsystem_id have a link state indication
 * problem, 600B, 600C, 600D, 640B, 640C and 640D.
 * macro below identifies these cards given the subsystem_id.
 */
#define CARDS_WITH_FAULTY_LINK_INDICATORS(dev_type, subid) \
	(dev_type == XFRAME_I_DEVICE) ?			\
		((((subid >= 0x600B) && (subid <= 0x600D)) || \
		 ((subid >= 0x640B) && (subid <= 0x640D))) ? 1 : 0) : 0

#define LINK_IS_UP(val64) (!(val64 & (ADAPTER_STATUS_RMAC_REMOTE_FAULT | \
				      ADAPTER_STATUS_RMAC_LOCAL_FAULT)))
#define TASKLET_IN_USE test_and_set_bit(0, (&sp->tasklet_status))
#define PANIC	1
#define LOW	2
static inline int rx_buffer_level(struct s2io_nic * sp, int rxb_size, int ring)
{
	struct mac_info *mac_control;

	mac_control = &sp->mac_control;
	if (rxb_size <= rxd_count[sp->rxd_mode])
		return PANIC;
	else if ((mac_control->rings[ring].pkt_cnt - rxb_size) > 16)
		return  LOW;
	return 0;
}

static inline int is_s2io_card_up(const struct s2io_nic * sp)
{
	return test_bit(__S2IO_STATE_CARD_UP, &sp->state);
}

/* Ethtool related variables and Macros. */
static char s2io_gstrings[][ETH_GSTRING_LEN] = {
	"Register test\t(offline)",
	"Eeprom test\t(offline)",
	"Link test\t(online)",
	"RLDRAM test\t(offline)",
	"BIST Test\t(offline)"
};

static char ethtool_xena_stats_keys[][ETH_GSTRING_LEN] = {
	{"tmac_frms"},
	{"tmac_data_octets"},
	{"tmac_drop_frms"},
	{"tmac_mcst_frms"},
	{"tmac_bcst_frms"},
	{"tmac_pause_ctrl_frms"},
	{"tmac_ttl_octets"},
	{"tmac_ucst_frms"},
	{"tmac_nucst_frms"},
	{"tmac_any_err_frms"},
	{"tmac_ttl_less_fb_octets"},
	{"tmac_vld_ip_octets"},
	{"tmac_vld_ip"},
	{"tmac_drop_ip"},
	{"tmac_icmp"},
	{"tmac_rst_tcp"},
	{"tmac_tcp"},
	{"tmac_udp"},
	{"rmac_vld_frms"},
	{"rmac_data_octets"},
	{"rmac_fcs_err_frms"},
	{"rmac_drop_frms"},
	{"rmac_vld_mcst_frms"},
	{"rmac_vld_bcst_frms"},
	{"rmac_in_rng_len_err_frms"},
	{"rmac_out_rng_len_err_frms"},
	{"rmac_long_frms"},
	{"rmac_pause_ctrl_frms"},
	{"rmac_unsup_ctrl_frms"},
	{"rmac_ttl_octets"},
	{"rmac_accepted_ucst_frms"},
	{"rmac_accepted_nucst_frms"},
	{"rmac_discarded_frms"},
	{"rmac_drop_events"},
	{"rmac_ttl_less_fb_octets"},
	{"rmac_ttl_frms"},
	{"rmac_usized_frms"},
	{"rmac_osized_frms"},
	{"rmac_frag_frms"},
	{"rmac_jabber_frms"},
	{"rmac_ttl_64_frms"},
	{"rmac_ttl_65_127_frms"},
	{"rmac_ttl_128_255_frms"},
	{"rmac_ttl_256_511_frms"},
	{"rmac_ttl_512_1023_frms"},
	{"rmac_ttl_1024_1518_frms"},
	{"rmac_ip"},
	{"rmac_ip_octets"},
	{"rmac_hdr_err_ip"},
	{"rmac_drop_ip"},
	{"rmac_icmp"},
	{"rmac_tcp"},
	{"rmac_udp"},
	{"rmac_err_drp_udp"},
	{"rmac_xgmii_err_sym"},
	{"rmac_frms_q0"},
	{"rmac_frms_q1"},
	{"rmac_frms_q2"},
	{"rmac_frms_q3"},
	{"rmac_frms_q4"},
	{"rmac_frms_q5"},
	{"rmac_frms_q6"},
	{"rmac_frms_q7"},
	{"rmac_full_q0"},
	{"rmac_full_q1"},
	{"rmac_full_q2"},
	{"rmac_full_q3"},
	{"rmac_full_q4"},
	{"rmac_full_q5"},
	{"rmac_full_q6"},
	{"rmac_full_q7"},
	{"rmac_pause_cnt"},
	{"rmac_xgmii_data_err_cnt"},
	{"rmac_xgmii_ctrl_err_cnt"},
	{"rmac_accepted_ip"},
	{"rmac_err_tcp"},
	{"rd_req_cnt"},
	{"new_rd_req_cnt"},
	{"new_rd_req_rtry_cnt"},
	{"rd_rtry_cnt"},
	{"wr_rtry_rd_ack_cnt"},
	{"wr_req_cnt"},
	{"new_wr_req_cnt"},
	{"new_wr_req_rtry_cnt"},
	{"wr_rtry_cnt"},
	{"wr_disc_cnt"},
	{"rd_rtry_wr_ack_cnt"},
	{"txp_wr_cnt"},
	{"txd_rd_cnt"},
	{"txd_wr_cnt"},
	{"rxd_rd_cnt"},
	{"rxd_wr_cnt"},
	{"txf_rd_cnt"},
	{"rxf_wr_cnt"}
};

static char ethtool_enhanced_stats_keys[][ETH_GSTRING_LEN] = {
	{"rmac_ttl_1519_4095_frms"},
	{"rmac_ttl_4096_8191_frms"},
	{"rmac_ttl_8192_max_frms"},
	{"rmac_ttl_gt_max_frms"},
	{"rmac_osized_alt_frms"},
	{"rmac_jabber_alt_frms"},
	{"rmac_gt_max_alt_frms"},
	{"rmac_vlan_frms"},
	{"rmac_len_discard"},
	{"rmac_fcs_discard"},
	{"rmac_pf_discard"},
	{"rmac_da_discard"},
	{"rmac_red_discard"},
	{"rmac_rts_discard"},
	{"rmac_ingm_full_discard"},
	{"link_fault_cnt"}
};

static char ethtool_driver_stats_keys[][ETH_GSTRING_LEN] = {
	{"\n DRIVER STATISTICS"},
	{"single_bit_ecc_errs"},
	{"double_bit_ecc_errs"},
	{"parity_err_cnt"},
	{"serious_err_cnt"},
	{"soft_reset_cnt"},
	{"fifo_full_cnt"},
	{"ring_0_full_cnt"},
	{"ring_1_full_cnt"},
	{"ring_2_full_cnt"},
	{"ring_3_full_cnt"},
	{"ring_4_full_cnt"},
	{"ring_5_full_cnt"},
	{"ring_6_full_cnt"},
	{"ring_7_full_cnt"},
	{"alarm_transceiver_temp_high"},
	{"alarm_transceiver_temp_low"},
	{"alarm_laser_bias_current_high"},
	{"alarm_laser_bias_current_low"},
	{"alarm_laser_output_power_high"},
	{"alarm_laser_output_power_low"},
	{"warn_transceiver_temp_high"},
	{"warn_transceiver_temp_low"},
	{"warn_laser_bias_current_high"},
	{"warn_laser_bias_current_low"},
	{"warn_laser_output_power_high"},
	{"warn_laser_output_power_low"},
	{"lro_aggregated_pkts"},
	{"lro_flush_both_count"},
	{"lro_out_of_sequence_pkts"},
	{"lro_flush_due_to_max_pkts"},
	{"lro_avg_aggr_pkts"},
	{"mem_alloc_fail_cnt"},
	{"pci_map_fail_cnt"},
	{"watchdog_timer_cnt"},
	{"mem_allocated"},
	{"mem_freed"},
	{"link_up_cnt"},
	{"link_down_cnt"},
	{"link_up_time"},
	{"link_down_time"},
	{"tx_tcode_buf_abort_cnt"},
	{"tx_tcode_desc_abort_cnt"},
	{"tx_tcode_parity_err_cnt"},
	{"tx_tcode_link_loss_cnt"},
	{"tx_tcode_list_proc_err_cnt"},
	{"rx_tcode_parity_err_cnt"},
	{"rx_tcode_abort_cnt"},
	{"rx_tcode_parity_abort_cnt"},
	{"rx_tcode_rda_fail_cnt"},
	{"rx_tcode_unkn_prot_cnt"},
	{"rx_tcode_fcs_err_cnt"},
	{"rx_tcode_buf_size_err_cnt"},
	{"rx_tcode_rxd_corrupt_cnt"},
	{"rx_tcode_unkn_err_cnt"},
	{"tda_err_cnt"},
	{"pfc_err_cnt"},
	{"pcc_err_cnt"},
	{"tti_err_cnt"},
	{"tpa_err_cnt"},
	{"sm_err_cnt"},
	{"lso_err_cnt"},
	{"mac_tmac_err_cnt"},
	{"mac_rmac_err_cnt"},
	{"xgxs_txgxs_err_cnt"},
	{"xgxs_rxgxs_err_cnt"},
	{"rc_err_cnt"},
	{"prc_pcix_err_cnt"},
	{"rpa_err_cnt"},
	{"rda_err_cnt"},
	{"rti_err_cnt"},
	{"mc_err_cnt"}
};

#define S2IO_XENA_STAT_LEN sizeof(ethtool_xena_stats_keys)/ ETH_GSTRING_LEN
#define S2IO_ENHANCED_STAT_LEN sizeof(ethtool_enhanced_stats_keys)/ \
					ETH_GSTRING_LEN
#define S2IO_DRIVER_STAT_LEN sizeof(ethtool_driver_stats_keys)/ ETH_GSTRING_LEN

#define XFRAME_I_STAT_LEN (S2IO_XENA_STAT_LEN + S2IO_DRIVER_STAT_LEN )
#define XFRAME_II_STAT_LEN (XFRAME_I_STAT_LEN + S2IO_ENHANCED_STAT_LEN )

#define XFRAME_I_STAT_STRINGS_LEN ( XFRAME_I_STAT_LEN * ETH_GSTRING_LEN )
#define XFRAME_II_STAT_STRINGS_LEN ( XFRAME_II_STAT_LEN * ETH_GSTRING_LEN )

#define S2IO_TEST_LEN	sizeof(s2io_gstrings) / ETH_GSTRING_LEN
#define S2IO_STRINGS_LEN	S2IO_TEST_LEN * ETH_GSTRING_LEN

#define S2IO_TIMER_CONF(timer, handle, arg, exp)		\
			init_timer(&timer);			\
			timer.function = handle;		\
			timer.data = (unsigned long) arg;	\
			mod_timer(&timer, (jiffies + exp))	\

/* copy mac addr to def_mac_addr array */
static void do_s2io_copy_mac_addr(struct s2io_nic *sp, int offset, u64 mac_addr)
{
	sp->def_mac_addr[offset].mac_addr[5] = (u8) (mac_addr);
	sp->def_mac_addr[offset].mac_addr[4] = (u8) (mac_addr >> 8);
	sp->def_mac_addr[offset].mac_addr[3] = (u8) (mac_addr >> 16);
	sp->def_mac_addr[offset].mac_addr[2] = (u8) (mac_addr >> 24);
	sp->def_mac_addr[offset].mac_addr[1] = (u8) (mac_addr >> 32);
	sp->def_mac_addr[offset].mac_addr[0] = (u8) (mac_addr >> 40);
}
/* Add the vlan */
static void s2io_vlan_rx_register(struct net_device *dev,
					struct vlan_group *grp)
{
	struct s2io_nic *nic = dev->priv;
	unsigned long flags;

	spin_lock_irqsave(&nic->tx_lock, flags);
	nic->vlgrp = grp;
	spin_unlock_irqrestore(&nic->tx_lock, flags);
}

/* A flag indicating whether 'RX_PA_CFG_STRIP_VLAN_TAG' bit is set or not */
static int vlan_strip_flag;

/*
 * Constants to be programmed into the Xena's registers, to configure
 * the XAUI.
 */

#define	END_SIGN	0x0
static const u64 herc_act_dtx_cfg[] = {
	/* Set address */
	0x8000051536750000ULL, 0x80000515367500E0ULL,
	/* Write data */
	0x8000051536750004ULL, 0x80000515367500E4ULL,
	/* Set address */
	0x80010515003F0000ULL, 0x80010515003F00E0ULL,
	/* Write data */
	0x80010515003F0004ULL, 0x80010515003F00E4ULL,
	/* Set address */
	0x801205150D440000ULL, 0x801205150D4400E0ULL,
	/* Write data */
	0x801205150D440004ULL, 0x801205150D4400E4ULL,
	/* Set address */
	0x80020515F2100000ULL, 0x80020515F21000E0ULL,
	/* Write data */
	0x80020515F2100004ULL, 0x80020515F21000E4ULL,
	/* Done */
	END_SIGN
};

static const u64 xena_dtx_cfg[] = {
	/* Set address */
	0x8000051500000000ULL, 0x80000515000000E0ULL,
	/* Write data */
	0x80000515D9350004ULL, 0x80000515D93500E4ULL,
	/* Set address */
	0x8001051500000000ULL, 0x80010515000000E0ULL,
	/* Write data */
	0x80010515001E0004ULL, 0x80010515001E00E4ULL,
	/* Set address */
	0x8002051500000000ULL, 0x80020515000000E0ULL,
	/* Write data */
	0x80020515F2100004ULL, 0x80020515F21000E4ULL,
	END_SIGN
};

/*
 * Constants for Fixing the MacAddress problem seen mostly on
 * Alpha machines.
 */
static const u64 fix_mac[] = {
	0x0060000000000000ULL, 0x0060600000000000ULL,
	0x0040600000000000ULL, 0x0000600000000000ULL,
	0x0020600000000000ULL, 0x0060600000000000ULL,
	0x0020600000000000ULL, 0x0060600000000000ULL,
	0x0020600000000000ULL, 0x0060600000000000ULL,
	0x0020600000000000ULL, 0x0060600000000000ULL,
	0x0020600000000000ULL, 0x0060600000000000ULL,
	0x0020600000000000ULL, 0x0060600000000000ULL,
	0x0020600000000000ULL, 0x0060600000000000ULL,
	0x0020600000000000ULL, 0x0060600000000000ULL,
	0x0020600000000000ULL, 0x0060600000000000ULL,
	0x0020600000000000ULL, 0x0060600000000000ULL,
	0x0020600000000000ULL, 0x0000600000000000ULL,
	0x0040600000000000ULL, 0x0060600000000000ULL,
	END_SIGN
};