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path: root/drivers/net/chelsio/tp.c
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-rw-r--r--drivers/net/chelsio/tp.c178
1 files changed, 178 insertions, 0 deletions
diff --git a/drivers/net/chelsio/tp.c b/drivers/net/chelsio/tp.c
new file mode 100644
index 000000000000..0ca0b6e19e43
--- /dev/null
+++ b/drivers/net/chelsio/tp.c
@@ -0,0 +1,178 @@
1/* $Date: 2006/02/07 04:21:54 $ $RCSfile: tp.c,v $ $Revision: 1.73 $ */
2#include "common.h"
3#include "regs.h"
4#include "tp.h"
5#ifdef CONFIG_CHELSIO_T1_1G
6#include "fpga_defs.h"
7#endif
8
9struct petp {
10 adapter_t *adapter;
11};
12
13/* Pause deadlock avoidance parameters */
14#define DROP_MSEC 16
15#define DROP_PKTS_CNT 1
16
17static void tp_init(adapter_t * ap, const struct tp_params *p,
18 unsigned int tp_clk)
19{
20 if (t1_is_asic(ap)) {
21 u32 val;
22
23 val = F_TP_IN_CSPI_CPL | F_TP_IN_CSPI_CHECK_IP_CSUM |
24 F_TP_IN_CSPI_CHECK_TCP_CSUM | F_TP_IN_ESPI_ETHERNET;
25 if (!p->pm_size)
26 val |= F_OFFLOAD_DISABLE;
27 else
28 val |= F_TP_IN_ESPI_CHECK_IP_CSUM |
29 F_TP_IN_ESPI_CHECK_TCP_CSUM;
30 writel(val, ap->regs + A_TP_IN_CONFIG);
31 writel(F_TP_OUT_CSPI_CPL |
32 F_TP_OUT_ESPI_ETHERNET |
33 F_TP_OUT_ESPI_GENERATE_IP_CSUM |
34 F_TP_OUT_ESPI_GENERATE_TCP_CSUM,
35 ap->regs + A_TP_OUT_CONFIG);
36 writel(V_IP_TTL(64) |
37 F_PATH_MTU /* IP DF bit */ |
38 V_5TUPLE_LOOKUP(p->use_5tuple_mode) |
39 V_SYN_COOKIE_PARAMETER(29),
40 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 }
54}
55
56void t1_tp_destroy(struct petp *tp)
57{
58 kfree(tp);
59}
60
61struct petp *__devinit t1_tp_create(adapter_t * adapter, struct tp_params *p)
62{
63 struct petp *tp = kzalloc(sizeof(*tp), GFP_KERNEL);
64 if (!tp)
65 return NULL;
66
67 tp->adapter = adapter;
68
69 return tp;
70}
71
72void t1_tp_intr_enable(struct petp *tp)
73{
74 u32 tp_intr = readl(tp->adapter->regs + A_PL_ENABLE);
75
76#ifdef CONFIG_CHELSIO_T1_1G
77 if (!t1_is_asic(tp->adapter)) {
78 /* FPGA */
79 writel(0xffffffff,
80 tp->adapter->regs + FPGA_TP_ADDR_INTERRUPT_ENABLE);
81 writel(tp_intr | FPGA_PCIX_INTERRUPT_TP,
82 tp->adapter->regs + A_PL_ENABLE);
83 } else
84#endif
85 {
86 /* We don't use any TP interrupts */
87 writel(0, tp->adapter->regs + A_TP_INT_ENABLE);
88 writel(tp_intr | F_PL_INTR_TP,
89 tp->adapter->regs + A_PL_ENABLE);
90 }
91}
92
93void t1_tp_intr_disable(struct petp *tp)
94{
95 u32 tp_intr = readl(tp->adapter->regs + A_PL_ENABLE);
96
97#ifdef CONFIG_CHELSIO_T1_1G
98 if (!t1_is_asic(tp->adapter)) {
99 /* FPGA */
100 writel(0, tp->adapter->regs + FPGA_TP_ADDR_INTERRUPT_ENABLE);
101 writel(tp_intr & ~FPGA_PCIX_INTERRUPT_TP,
102 tp->adapter->regs + A_PL_ENABLE);
103 } else
104#endif
105 {
106 writel(0, tp->adapter->regs + A_TP_INT_ENABLE);
107 writel(tp_intr & ~F_PL_INTR_TP,
108 tp->adapter->regs + A_PL_ENABLE);
109 }
110}
111
112void t1_tp_intr_clear(struct petp *tp)
113{
114#ifdef CONFIG_CHELSIO_T1_1G
115 if (!t1_is_asic(tp->adapter)) {
116 writel(0xffffffff,
117 tp->adapter->regs + FPGA_TP_ADDR_INTERRUPT_CAUSE);
118 writel(FPGA_PCIX_INTERRUPT_TP, tp->adapter->regs + A_PL_CAUSE);
119 return;
120 }
121#endif
122 writel(0xffffffff, tp->adapter->regs + A_TP_INT_CAUSE);
123 writel(F_PL_INTR_TP, tp->adapter->regs + A_PL_CAUSE);
124}
125
126int t1_tp_intr_handler(struct petp *tp)
127{
128 u32 cause;
129
130#ifdef CONFIG_CHELSIO_T1_1G
131 /* FPGA doesn't support TP interrupts. */
132 if (!t1_is_asic(tp->adapter))
133 return 1;
134#endif
135
136 cause = readl(tp->adapter->regs + A_TP_INT_CAUSE);
137 writel(cause, tp->adapter->regs + A_TP_INT_CAUSE);
138 return 0;
139}
140
141static void set_csum_offload(struct petp *tp, u32 csum_bit, int enable)
142{
143 u32 val = readl(tp->adapter->regs + A_TP_GLOBAL_CONFIG);
144
145 if (enable)
146 val |= csum_bit;
147 else
148 val &= ~csum_bit;
149 writel(val, tp->adapter->regs + A_TP_GLOBAL_CONFIG);
150}
151
152void t1_tp_set_ip_checksum_offload(struct petp *tp, int enable)
153{
154 set_csum_offload(tp, F_IP_CSUM, enable);
155}
156
157void t1_tp_set_udp_checksum_offload(struct petp *tp, int enable)
158{
159 set_csum_offload(tp, F_UDP_CSUM, enable);
160}
161
162void t1_tp_set_tcp_checksum_offload(struct petp *tp, int enable)
163{
164 set_csum_offload(tp, F_TCP_CSUM, enable);
165}
166
167/*
168 * Initialize TP state. tp_params contains initial settings for some TP
169 * parameters, particularly the one-time PM and CM settings.
170 */
171int t1_tp_reset(struct petp *tp, struct tp_params *p, unsigned int tp_clk)
172{
173 adapter_t *adapter = tp->adapter;
174
175 tp_init(adapter, p, tp_clk);
176 writel(F_TP_RESET, adapter->regs + A_TP_RESET);
177 return 0;
178}