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-rw-r--r--drivers/net/chelsio/tp.c188
1 files changed, 188 insertions, 0 deletions
diff --git a/drivers/net/chelsio/tp.c b/drivers/net/chelsio/tp.c
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1/*****************************************************************************
2 * *
3 * File: tp.c *
4 * $Revision: 1.6 $ *
5 * $Date: 2005/03/23 07:15:59 $ *
6 * Description: *
7 * Core ASIC Management. *
8 * part of the Chelsio 10Gb Ethernet Driver. *
9 * *
10 * This program is free software; you can redistribute it and/or modify *
11 * it under the terms of the GNU General Public License, version 2, as *
12 * published by the Free Software Foundation. *
13 * *
14 * You should have received a copy of the GNU General Public License along *
15 * with this program; if not, write to the Free Software Foundation, Inc., *
16 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
17 * *
18 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED *
19 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF *
20 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. *
21 * *
22 * http://www.chelsio.com *
23 * *
24 * Copyright (c) 2003 - 2005 Chelsio Communications, Inc. *
25 * All rights reserved. *
26 * *
27 * Maintainers: maintainers@chelsio.com *
28 * *
29 * Authors: Dimitrios Michailidis <dm@chelsio.com> *
30 * Tina Yang <tainay@chelsio.com> *
31 * Felix Marti <felix@chelsio.com> *
32 * Scott Bardone <sbardone@chelsio.com> *
33 * Kurt Ottaway <kottaway@chelsio.com> *
34 * Frank DiMambro <frank@chelsio.com> *
35 * *
36 * History: *
37 * *
38 ****************************************************************************/
39
40#include "common.h"
41#include "regs.h"
42#include "tp.h"
43
44struct petp {
45 adapter_t *adapter;
46};
47
48/* Pause deadlock avoidance parameters */
49#define DROP_MSEC 16
50#define DROP_PKTS_CNT 1
51
52
53static void tp_init(adapter_t *ap, const struct tp_params *p,
54 unsigned int tp_clk)
55{
56 if (t1_is_asic(ap)) {
57 u32 val;
58
59 val = F_TP_IN_CSPI_CPL | F_TP_IN_CSPI_CHECK_IP_CSUM |
60 F_TP_IN_CSPI_CHECK_TCP_CSUM | F_TP_IN_ESPI_ETHERNET;
61 if (!p->pm_size)
62 val |= F_OFFLOAD_DISABLE;
63 else
64 val |= F_TP_IN_ESPI_CHECK_IP_CSUM |
65 F_TP_IN_ESPI_CHECK_TCP_CSUM;
66 t1_write_reg_4(ap, A_TP_IN_CONFIG, val);
67 t1_write_reg_4(ap, A_TP_OUT_CONFIG, F_TP_OUT_CSPI_CPL |
68 F_TP_OUT_ESPI_ETHERNET |
69 F_TP_OUT_ESPI_GENERATE_IP_CSUM |
70 F_TP_OUT_ESPI_GENERATE_TCP_CSUM);
71 t1_write_reg_4(ap, A_TP_GLOBAL_CONFIG, V_IP_TTL(64) |
72 F_PATH_MTU /* IP DF bit */ |
73 V_5TUPLE_LOOKUP(p->use_5tuple_mode) |
74 V_SYN_COOKIE_PARAMETER(29));
75
76 /*
77 * Enable pause frame deadlock prevention.
78 */
79 if (is_T2(ap)) {
80 u32 drop_ticks = DROP_MSEC * (tp_clk / 1000);
81
82 t1_write_reg_4(ap, A_TP_TX_DROP_CONFIG,
83 F_ENABLE_TX_DROP | F_ENABLE_TX_ERROR |
84 V_DROP_TICKS_CNT(drop_ticks) |
85 V_NUM_PKTS_DROPPED(DROP_PKTS_CNT));
86 }
87
88 }
89}
90
91void t1_tp_destroy(struct petp *tp)
92{
93 kfree(tp);
94}
95
96struct petp * __devinit t1_tp_create(adapter_t *adapter, struct tp_params *p)
97{
98 struct petp *tp = kmalloc(sizeof(*tp), GFP_KERNEL);
99 if (!tp)
100 return NULL;
101 memset(tp, 0, sizeof(*tp));
102 tp->adapter = adapter;
103
104 return tp;
105}
106
107void t1_tp_intr_enable(struct petp *tp)
108{
109 u32 tp_intr = t1_read_reg_4(tp->adapter, A_PL_ENABLE);
110
111 {
112 /* We don't use any TP interrupts */
113 t1_write_reg_4(tp->adapter, A_TP_INT_ENABLE, 0);
114 t1_write_reg_4(tp->adapter, A_PL_ENABLE,
115 tp_intr | F_PL_INTR_TP);
116 }
117}
118
119void t1_tp_intr_disable(struct petp *tp)
120{
121 u32 tp_intr = t1_read_reg_4(tp->adapter, A_PL_ENABLE);
122
123 {
124 t1_write_reg_4(tp->adapter, A_TP_INT_ENABLE, 0);
125 t1_write_reg_4(tp->adapter, A_PL_ENABLE,
126 tp_intr & ~F_PL_INTR_TP);
127 }
128}
129
130void t1_tp_intr_clear(struct petp *tp)
131{
132 t1_write_reg_4(tp->adapter, A_TP_INT_CAUSE, 0xffffffff);
133 t1_write_reg_4(tp->adapter, A_PL_CAUSE, F_PL_INTR_TP);
134}
135
136int t1_tp_intr_handler(struct petp *tp)
137{
138 u32 cause;
139
140
141 cause = t1_read_reg_4(tp->adapter, A_TP_INT_CAUSE);
142 t1_write_reg_4(tp->adapter, A_TP_INT_CAUSE, cause);
143 return 0;
144}
145
146static void set_csum_offload(struct petp *tp, u32 csum_bit, int enable)
147{
148 u32 val = t1_read_reg_4(tp->adapter, A_TP_GLOBAL_CONFIG);
149
150 if (enable)
151 val |= csum_bit;
152 else
153 val &= ~csum_bit;
154 t1_write_reg_4(tp->adapter, A_TP_GLOBAL_CONFIG, val);
155}
156
157void t1_tp_set_ip_checksum_offload(struct petp *tp, int enable)
158{
159 set_csum_offload(tp, F_IP_CSUM, enable);
160}
161
162void t1_tp_set_udp_checksum_offload(struct petp *tp, int enable)
163{
164 set_csum_offload(tp, F_UDP_CSUM, enable);
165}
166
167void t1_tp_set_tcp_checksum_offload(struct petp *tp, int enable)
168{
169 set_csum_offload(tp, F_TCP_CSUM, enable);
170}
171
172/*
173 * Initialize TP state. tp_params contains initial settings for some TP
174 * parameters, particularly the one-time PM and CM settings.
175 */
176int t1_tp_reset(struct petp *tp, struct tp_params *p, unsigned int tp_clk)
177{
178 int busy = 0;
179 adapter_t *adapter = tp->adapter;
180
181 tp_init(adapter, p, tp_clk);
182 if (!busy)
183 t1_write_reg_4(adapter, A_TP_RESET, F_TP_RESET);
184 else
185 CH_ERR("%s: TP initialization timed out\n",
186 adapter->name);
187 return busy;
188}
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