1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
|
/*******************************************************************************
This contains the functions to handle the normal descriptors.
Copyright (C) 2007-2009 STMicroelectronics Ltd
This program is free software; you can redistribute it and/or modify it
under the terms and conditions of the GNU General Public License,
version 2, as published by the Free Software Foundation.
This program is distributed in the hope it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
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.,
51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
The full GNU General Public License is included in this distribution in
the file called "COPYING".
Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
*******************************************************************************/
#include "common.h"
static int ndesc_get_tx_status(void *data, struct stmmac_extra_stats *x,
struct dma_desc *p, unsigned long ioaddr)
{
int ret = 0;
struct net_device_stats *stats = (struct net_device_stats *)data;
if (unlikely(p->des01.tx.error_summary)) {
if (unlikely(p->des01.tx.underflow_error)) {
x->tx_underflow++;
stats->tx_fifo_errors++;
}
if (unlikely(p->des01.tx.no_carrier)) {
x->tx_carrier++;
stats->tx_carrier_errors++;
}
if (unlikely(p->des01.tx.loss_carrier)) {
x->tx_losscarrier++;
stats->tx_carrier_errors++;
}
if (unlikely((p->des01.tx.excessive_deferral) ||
(p->des01.tx.excessive_collisions) ||
(p->des01.tx.late_collision)))
stats->collisions += p->des01.tx.collision_count;
ret = -1;
}
if (unlikely(p->des01.tx.heartbeat_fail)) {
x->tx_heartbeat++;
stats->tx_heartbeat_errors++;
ret = -1;
}
if (unlikely(p->des01.tx.deferred))
x->tx_deferred++;
return ret;
}
static int ndesc_get_tx_len(struct dma_desc *p)
{
return p->des01.tx.buffer1_size;
}
/* This function verifies if each incoming frame has some errors
* and, if required, updates the multicast statistics.
* In case of success, it returns csum_none becasue the device
* is not able to compute the csum in HW. */
static int ndesc_get_rx_status(void *data, struct stmmac_extra_stats *x,
struct dma_desc *p)
{
int ret = csum_none;
struct net_device_stats *stats = (struct net_device_stats *)data;
if (unlikely(p->des01.rx.last_descriptor == 0)) {
pr_warning("ndesc Error: Oversized Ethernet "
"frame spanned multiple buffers\n");
stats->rx_length_errors++;
return discard_frame;
}
if (unlikely(p->des01.rx.error_summary)) {
if (unlikely(p->des01.rx.descriptor_error))
x->rx_desc++;
if (unlikely(p->des01.rx.partial_frame_error))
x->rx_partial++;
if (unlikely(p->des01.rx.run_frame))
x->rx_runt++;
if (unlikely(p->des01.rx.frame_too_long))
x->rx_toolong++;
if (unlikely(p->des01.rx.collision)) {
x->rx_collision++;
stats->collisions++;
}
if (unlikely(p->des01.rx.crc_error)) {
x->rx_crc++;
stats->rx_crc_errors++;
}
ret = discard_frame;
}
if (unlikely(p->des01.rx.dribbling))
ret = discard_frame;
if (unlikely(p->des01.rx.length_error)) {
x->rx_length++;
ret = discard_frame;
}
if (unlikely(p->des01.rx.mii_error)) {
x->rx_mii++;
ret = discard_frame;
}
if (p->des01.rx.multicast_frame) {
x->rx_multicast++;
stats->multicast++;
}
return ret;
}
static void ndesc_init_rx_desc(struct dma_desc *p, unsigned int ring_size,
int disable_rx_ic)
{
int i;
for (i = 0; i < ring_size; i++) {
p->des01.rx.own = 1;
p->des01.rx.buffer1_size = BUF_SIZE_2KiB - 1;
if (i == ring_size - 1)
p->des01.rx.end_ring = 1;
if (disable_rx_ic)
p->des01.rx.disable_ic = 1;
p++;
}
return;
}
static void ndesc_init_tx_desc(struct dma_desc *p, unsigned int ring_size)
{
int i;
for (i = 0; i < ring_size; i++) {
p->des01.tx.own = 0;
if (i == ring_size - 1)
p->des01.tx.end_ring = 1;
p++;
}
return;
}
static int ndesc_get_tx_owner(struct dma_desc *p)
{
return p->des01.tx.own;
}
static int ndesc_get_rx_owner(struct dma_desc *p)
{
return p->des01.rx.own;
}
static void ndesc_set_tx_owner(struct dma_desc *p)
{
p->des01.tx.own = 1;
}
static void ndesc_set_rx_owner(struct dma_desc *p)
{
p->des01.rx.own = 1;
}
static int ndesc_get_tx_ls(struct dma_desc *p)
{
return p->des01.tx.last_segment;
}
static void ndesc_release_tx_desc(struct dma_desc *p)
{
int ter = p->des01.tx.end_ring;
/* clean field used within the xmit */
p->des01.tx.first_segment = 0;
p->des01.tx.last_segment = 0;
p->des01.tx.buffer1_size = 0;
/* clean status reported */
p->des01.tx.error_summary = 0;
p->des01.tx.underflow_error = 0;
p->des01.tx.no_carrier = 0;
p->des01.tx.loss_carrier = 0;
p->des01.tx.excessive_deferral = 0;
p->des01.tx.excessive_collisions = 0;
p->des01.tx.late_collision = 0;
p->des01.tx.heartbeat_fail = 0;
p->des01.tx.deferred = 0;
/* set termination field */
p->des01.tx.end_ring = ter;
return;
}
static void ndesc_prepare_tx_desc(struct dma_desc *p, int is_fs, int len,
int csum_flag)
{
p->des01.tx.first_segment = is_fs;
p->des01.tx.buffer1_size = len;
}
static void ndesc_clear_tx_ic(struct dma_desc *p)
{
p->des01.tx.interrupt = 0;
}
static void ndesc_close_tx_desc(struct dma_desc *p)
{
p->des01.tx.last_segment = 1;
p->des01.tx.interrupt = 1;
}
static int ndesc_get_rx_frame_len(struct dma_desc *p)
{
return p->des01.rx.frame_length;
}
struct stmmac_desc_ops ndesc_ops = {
.tx_status = ndesc_get_tx_status,
.rx_status = ndesc_get_rx_status,
.get_tx_len = ndesc_get_tx_len,
.init_rx_desc = ndesc_init_rx_desc,
.init_tx_desc = ndesc_init_tx_desc,
.get_tx_owner = ndesc_get_tx_owner,
.get_rx_owner = ndesc_get_rx_owner,
.release_tx_desc = ndesc_release_tx_desc,
.prepare_tx_desc = ndesc_prepare_tx_desc,
.clear_tx_ic = ndesc_clear_tx_ic,
.close_tx_desc = ndesc_close_tx_desc,
.get_tx_ls = ndesc_get_tx_ls,
.set_tx_owner = ndesc_set_tx_owner,
.set_rx_owner = ndesc_set_rx_owner,
.get_rx_frame_len = ndesc_get_rx_frame_len,
};
|
