173 lines · c
1// SPDX-License-Identifier: GPL-2.02/* $Date: 2006/02/07 04:21:54 $ $RCSfile: tp.c,v $ $Revision: 1.73 $ */3#include "common.h"4#include "regs.h"5#include "tp.h"6#ifdef CONFIG_CHELSIO_T1_1G7#include "fpga_defs.h"8#endif9 10struct petp {11 adapter_t *adapter;12};13 14/* Pause deadlock avoidance parameters */15#define DROP_MSEC 1616#define DROP_PKTS_CNT 117 18static void tp_init(adapter_t * ap, const struct tp_params *p,19 unsigned int tp_clk)20{21 u32 val;22 23 if (!t1_is_asic(ap))24 return;25 26 val = F_TP_IN_CSPI_CPL | F_TP_IN_CSPI_CHECK_IP_CSUM |27 F_TP_IN_CSPI_CHECK_TCP_CSUM | F_TP_IN_ESPI_ETHERNET;28 if (!p->pm_size)29 val |= F_OFFLOAD_DISABLE;30 else31 val |= F_TP_IN_ESPI_CHECK_IP_CSUM | F_TP_IN_ESPI_CHECK_TCP_CSUM;32 writel(val, ap->regs + A_TP_IN_CONFIG);33 writel(F_TP_OUT_CSPI_CPL |34 F_TP_OUT_ESPI_ETHERNET |35 F_TP_OUT_ESPI_GENERATE_IP_CSUM |36 F_TP_OUT_ESPI_GENERATE_TCP_CSUM, ap->regs + A_TP_OUT_CONFIG);37 writel(V_IP_TTL(64) |38 F_PATH_MTU /* IP DF bit */ |39 V_5TUPLE_LOOKUP(p->use_5tuple_mode) |40 V_SYN_COOKIE_PARAMETER(29), ap->regs + A_TP_GLOBAL_CONFIG);41 /*42 * Enable pause frame deadlock prevention.43 */44 if (is_T2(ap) && ap->params.nports > 1) {45 u32 drop_ticks = DROP_MSEC * (tp_clk / 1000);46 47 writel(F_ENABLE_TX_DROP | F_ENABLE_TX_ERROR |48 V_DROP_TICKS_CNT(drop_ticks) |49 V_NUM_PKTS_DROPPED(DROP_PKTS_CNT),50 ap->regs + A_TP_TX_DROP_CONFIG);51 }52}53 54void t1_tp_destroy(struct petp *tp)55{56 kfree(tp);57}58 59struct petp *t1_tp_create(adapter_t *adapter, struct tp_params *p)60{61 struct petp *tp = kzalloc(sizeof(*tp), GFP_KERNEL);62 63 if (!tp)64 return NULL;65 66 tp->adapter = adapter;67 68 return tp;69}70 71void t1_tp_intr_enable(struct petp *tp)72{73 u32 tp_intr = readl(tp->adapter->regs + A_PL_ENABLE);74 75#ifdef CONFIG_CHELSIO_T1_1G76 if (!t1_is_asic(tp->adapter)) {77 /* FPGA */78 writel(0xffffffff,79 tp->adapter->regs + FPGA_TP_ADDR_INTERRUPT_ENABLE);80 writel(tp_intr | FPGA_PCIX_INTERRUPT_TP,81 tp->adapter->regs + A_PL_ENABLE);82 } else83#endif84 {85 /* We don't use any TP interrupts */86 writel(0, tp->adapter->regs + A_TP_INT_ENABLE);87 writel(tp_intr | F_PL_INTR_TP,88 tp->adapter->regs + A_PL_ENABLE);89 }90}91 92void t1_tp_intr_disable(struct petp *tp)93{94 u32 tp_intr = readl(tp->adapter->regs + A_PL_ENABLE);95 96#ifdef CONFIG_CHELSIO_T1_1G97 if (!t1_is_asic(tp->adapter)) {98 /* FPGA */99 writel(0, tp->adapter->regs + FPGA_TP_ADDR_INTERRUPT_ENABLE);100 writel(tp_intr & ~FPGA_PCIX_INTERRUPT_TP,101 tp->adapter->regs + A_PL_ENABLE);102 } else103#endif104 {105 writel(0, tp->adapter->regs + A_TP_INT_ENABLE);106 writel(tp_intr & ~F_PL_INTR_TP,107 tp->adapter->regs + A_PL_ENABLE);108 }109}110 111void t1_tp_intr_clear(struct petp *tp)112{113#ifdef CONFIG_CHELSIO_T1_1G114 if (!t1_is_asic(tp->adapter)) {115 writel(0xffffffff,116 tp->adapter->regs + FPGA_TP_ADDR_INTERRUPT_CAUSE);117 writel(FPGA_PCIX_INTERRUPT_TP, tp->adapter->regs + A_PL_CAUSE);118 return;119 }120#endif121 writel(0xffffffff, tp->adapter->regs + A_TP_INT_CAUSE);122 writel(F_PL_INTR_TP, tp->adapter->regs + A_PL_CAUSE);123}124 125int t1_tp_intr_handler(struct petp *tp)126{127 u32 cause;128 129#ifdef CONFIG_CHELSIO_T1_1G130 /* FPGA doesn't support TP interrupts. */131 if (!t1_is_asic(tp->adapter))132 return 1;133#endif134 135 cause = readl(tp->adapter->regs + A_TP_INT_CAUSE);136 writel(cause, tp->adapter->regs + A_TP_INT_CAUSE);137 return 0;138}139 140static void set_csum_offload(struct petp *tp, u32 csum_bit, int enable)141{142 u32 val = readl(tp->adapter->regs + A_TP_GLOBAL_CONFIG);143 144 if (enable)145 val |= csum_bit;146 else147 val &= ~csum_bit;148 writel(val, tp->adapter->regs + A_TP_GLOBAL_CONFIG);149}150 151void t1_tp_set_ip_checksum_offload(struct petp *tp, int enable)152{153 set_csum_offload(tp, F_IP_CSUM, enable);154}155 156void t1_tp_set_tcp_checksum_offload(struct petp *tp, int enable)157{158 set_csum_offload(tp, F_TCP_CSUM, enable);159}160 161/*162 * Initialize TP state. tp_params contains initial settings for some TP163 * parameters, particularly the one-time PM and CM settings.164 */165int t1_tp_reset(struct petp *tp, struct tp_params *p, unsigned int tp_clk)166{167 adapter_t *adapter = tp->adapter;168 169 tp_init(adapter, p, tp_clk);170 writel(F_TP_RESET, adapter->regs + A_TP_RESET);171 return 0;172}173