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/*****************************************************************************
* *
* File: tp.c *
* $Revision: 1.6 $ *
* $Date: 2005/03/23 07:15:59 $ *
* Description: *
* Core ASIC Management. *
* part of the Chelsio 10Gb Ethernet Driver. *
* *
* 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. *
* *
* You should have received a copy of the GNU General Public License along *
* with this program; if not, write to the Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
* *
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED *
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF *
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. *
* *
* http://www.chelsio.com *
* *
* Copyright (c) 2003 - 2005 Chelsio Communications, Inc. *
* All rights reserved. *
* *
* Maintainers: maintainers@chelsio.com *
* *
* Authors: Dimitrios Michailidis <dm@chelsio.com> *
* Tina Yang <tainay@chelsio.com> *
* Felix Marti <felix@chelsio.com> *
* Scott Bardone <sbardone@chelsio.com> *
* Kurt Ottaway <kottaway@chelsio.com> *
* Frank DiMambro <frank@chelsio.com> *
* *
* History: *
* *
****************************************************************************/
#include "common.h"
#include "regs.h"
#include "tp.h"
struct petp {
adapter_t *adapter;
};
/* Pause deadlock avoidance parameters */
#define DROP_MSEC 16
#define DROP_PKTS_CNT 1
static void tp_init(adapter_t *ap, const struct tp_params *p,
unsigned int tp_clk)
{
if (t1_is_asic(ap)) {
u32 val;
val = F_TP_IN_CSPI_CPL | F_TP_IN_CSPI_CHECK_IP_CSUM |
F_TP_IN_CSPI_CHECK_TCP_CSUM | F_TP_IN_ESPI_ETHERNET;
if (!p->pm_size)
val |= F_OFFLOAD_DISABLE;
else
val |= F_TP_IN_ESPI_CHECK_IP_CSUM |
F_TP_IN_ESPI_CHECK_TCP_CSUM;
t1_write_reg_4(ap, A_TP_IN_CONFIG, val);
t1_write_reg_4(ap, A_TP_OUT_CONFIG, F_TP_OUT_CSPI_CPL |
F_TP_OUT_ESPI_ETHERNET |
F_TP_OUT_ESPI_GENERATE_IP_CSUM |
F_TP_OUT_ESPI_GENERATE_TCP_CSUM);
t1_write_reg_4(ap, A_TP_GLOBAL_CONFIG, V_IP_TTL(64) |
F_PATH_MTU /* IP DF bit */ |
V_5TUPLE_LOOKUP(p->use_5tuple_mode) |
V_SYN_COOKIE_PARAMETER(29));
/*
* Enable pause frame deadlock prevention.
*/
if (is_T2(ap)) {
u32 drop_ticks = DROP_MSEC * (tp_clk / 1000);
t1_write_reg_4(ap, A_TP_TX_DROP_CONFIG,
F_ENABLE_TX_DROP | F_ENABLE_TX_ERROR |
V_DROP_TICKS_CNT(drop_ticks) |
V_NUM_PKTS_DROPPED(DROP_PKTS_CNT));
}
}
}
void t1_tp_destroy(struct petp *tp)
{
kfree(tp);
}
struct petp * __devinit t1_tp_create(adapter_t *adapter, struct tp_params *p)
{
struct petp *tp = kmalloc(sizeof(*tp), GFP_KERNEL);
if (!tp)
return NULL;
memset(tp, 0, sizeof(*tp));
tp->adapter = adapter;
return tp;
}
void t1_tp_intr_enable(struct petp *tp)
{
u32 tp_intr = t1_read_reg_4(tp->adapter, A_PL_ENABLE);
{
/* We don't use any TP interrupts */
t1_write_reg_4(tp->adapter, A_TP_INT_ENABLE, 0);
t1_write_reg_4(tp->adapter, A_PL_ENABLE,
tp_intr | F_PL_INTR_TP);
}
}
void t1_tp_intr_disable(struct petp *tp)
{
u32 tp_intr = t1_read_reg_4(tp->adapter, A_PL_ENABLE);
{
t1_write_reg_4(tp->adapter, A_TP_INT_ENABLE, 0);
t1_write_reg_4(tp->adapter, A_PL_ENABLE,
tp_intr & ~F_PL_INTR_TP);
}
}
void t1_tp_intr_clear(struct petp *tp)
{
t1_write_reg_4(tp->adapter, A_TP_INT_CAUSE, 0xffffffff);
t1_write_reg_4(tp->adapter, A_PL_CAUSE, F_PL_INTR_TP);
}
int t1_tp_intr_handler(struct petp *tp)
{
u32 cause;
cause = t1_read_reg_4(tp->adapter, A_TP_INT_CAUSE);
t1_write_reg_4(tp->adapter, A_TP_INT_CAUSE, cause);
return 0;
}
static void set_csum_offload(struct petp *tp, u32 csum_bit, int enable)
{
u32 val = t1_read_reg_4(tp->adapter, A_TP_GLOBAL_CONFIG);
if (enable)
val |= csum_bit;
else
val &= ~csum_bit;
t1_write_reg_4(tp->adapter, A_TP_GLOBAL_CONFIG, val);
}
void t1_tp_set_ip_checksum_offload(struct petp *tp, int enable)
{
set_csum_offload(tp, F_IP_CSUM, enable);
}
void t1_tp_set_udp_checksum_offload(struct petp *tp, int enable)
{
set_csum_offload(tp, F_UDP_CSUM, enable);
}
void t1_tp_set_tcp_checksum_offload(struct petp *tp, int enable)
{
set_csum_offload(tp, F_TCP_CSUM, enable);
}
/*
* Initialize TP state. tp_params contains initial settings for some TP
* parameters, particularly the one-time PM and CM settings.
*/
int t1_tp_reset(struct petp *tp, struct tp_params *p, unsigned int tp_clk)
{
int busy = 0;
adapter_t *adapter = tp->adapter;
tp_init(adapter, p, tp_clk);
if (!busy)
t1_write_reg_4(adapter, A_TP_RESET, F_TP_RESET);
else
CH_ERR("%s: TP initialization timed out\n",
adapter->name);
return busy;
}
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