1 /*
2 * Copyright (c) 2011, 2012, Qualcomm Atheros Communications Inc.
3 * Copyright (c) 2014, I2SE GmbH
4 *
5 * Permission to use, copy, modify, and/or distribute this software
6 * for any purpose with or without fee is hereby granted, provided
7 * that the above copyright notice and this permission notice appear
8 * in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
11 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
12 * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
13 * THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
14 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
15 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
16 * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
17 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 */
19
20 /* This file contains debugging routines for use in the QCA7K driver.
21 */
22
23 #include <linux/debugfs.h>
24 #include <linux/ethtool.h>
25 #include <linux/seq_file.h>
26 #include <linux/types.h>
27
28 #include "qca_7k.h"
29 #include "qca_debug.h"
30
31 #define QCASPI_MAX_REGS 0x20
32
33 #define QCASPI_RX_MAX_FRAMES 4
34
35 static const u16 qcaspi_spi_regs[] = {
36 SPI_REG_BFR_SIZE,
37 SPI_REG_WRBUF_SPC_AVA,
38 SPI_REG_RDBUF_BYTE_AVA,
39 SPI_REG_SPI_CONFIG,
40 SPI_REG_SPI_STATUS,
41 SPI_REG_INTR_CAUSE,
42 SPI_REG_INTR_ENABLE,
43 SPI_REG_RDBUF_WATERMARK,
44 SPI_REG_WRBUF_WATERMARK,
45 SPI_REG_SIGNATURE,
46 SPI_REG_ACTION_CTRL
47 };
48
49 /* The order of these strings must match the order of the fields in
50 * struct qcaspi_stats
51 * See qca_spi.h
52 */
53 static const char qcaspi_gstrings_stats[][ETH_GSTRING_LEN] = {
54 "Triggered resets",
55 "Device resets",
56 "Reset timeouts",
57 "Read errors",
58 "Write errors",
59 "Read buffer errors",
60 "Write buffer errors",
61 "Out of memory",
62 "Write buffer misses",
63 "Transmit ring full",
64 "SPI errors",
65 "Write verify errors",
66 "Buffer available errors",
67 "Bad signature",
68 };
69
70 #ifdef CONFIG_DEBUG_FS
71
72 static int
qcaspi_info_show(struct seq_file * s,void * what)73 qcaspi_info_show(struct seq_file *s, void *what)
74 {
75 struct qcaspi *qca = s->private;
76
77 seq_printf(s, "RX buffer size : %lu\n",
78 (unsigned long)qca->buffer_size);
79
80 seq_puts(s, "TX ring state : ");
81
82 if (qca->txr.skb[qca->txr.head] == NULL)
83 seq_puts(s, "empty");
84 else if (qca->txr.skb[qca->txr.tail])
85 seq_puts(s, "full");
86 else
87 seq_puts(s, "in use");
88
89 seq_puts(s, "\n");
90
91 seq_printf(s, "TX ring size : %u\n",
92 qca->txr.size);
93
94 seq_printf(s, "Sync state : %u (",
95 (unsigned int)qca->sync);
96 switch (qca->sync) {
97 case QCASPI_SYNC_UNKNOWN:
98 seq_puts(s, "QCASPI_SYNC_UNKNOWN");
99 break;
100 case QCASPI_SYNC_RESET:
101 seq_puts(s, "QCASPI_SYNC_RESET");
102 break;
103 case QCASPI_SYNC_READY:
104 seq_puts(s, "QCASPI_SYNC_READY");
105 break;
106 default:
107 seq_puts(s, "INVALID");
108 break;
109 }
110 seq_puts(s, ")\n");
111
112 seq_printf(s, "IRQ : %d\n",
113 qca->spi_dev->irq);
114 seq_printf(s, "INTR : %lx\n",
115 qca->intr);
116
117 seq_printf(s, "SPI max speed : %lu\n",
118 (unsigned long)qca->spi_dev->max_speed_hz);
119 seq_printf(s, "SPI mode : %x\n",
120 qca->spi_dev->mode);
121 seq_printf(s, "SPI chip select : %u\n",
122 (unsigned int)spi_get_chipselect(qca->spi_dev, 0));
123 seq_printf(s, "SPI legacy mode : %u\n",
124 (unsigned int)qca->legacy_mode);
125 seq_printf(s, "SPI burst length : %u\n",
126 (unsigned int)qca->burst_len);
127
128 return 0;
129 }
130 DEFINE_SHOW_ATTRIBUTE(qcaspi_info);
131
132 void
qcaspi_init_device_debugfs(struct qcaspi * qca)133 qcaspi_init_device_debugfs(struct qcaspi *qca)
134 {
135 qca->device_root = debugfs_create_dir(dev_name(&qca->net_dev->dev),
136 NULL);
137
138 debugfs_create_file("info", S_IFREG | 0444, qca->device_root, qca,
139 &qcaspi_info_fops);
140 }
141
142 void
qcaspi_remove_device_debugfs(struct qcaspi * qca)143 qcaspi_remove_device_debugfs(struct qcaspi *qca)
144 {
145 debugfs_remove_recursive(qca->device_root);
146 }
147
148 #else /* CONFIG_DEBUG_FS */
149
150 void
qcaspi_init_device_debugfs(struct qcaspi * qca)151 qcaspi_init_device_debugfs(struct qcaspi *qca)
152 {
153 }
154
155 void
qcaspi_remove_device_debugfs(struct qcaspi * qca)156 qcaspi_remove_device_debugfs(struct qcaspi *qca)
157 {
158 }
159
160 #endif
161
162 static void
qcaspi_get_drvinfo(struct net_device * dev,struct ethtool_drvinfo * p)163 qcaspi_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *p)
164 {
165 struct qcaspi *qca = netdev_priv(dev);
166
167 strscpy(p->driver, QCASPI_DRV_NAME, sizeof(p->driver));
168 strscpy(p->version, QCASPI_DRV_VERSION, sizeof(p->version));
169 strscpy(p->fw_version, "QCA7000", sizeof(p->fw_version));
170 strscpy(p->bus_info, dev_name(&qca->spi_dev->dev),
171 sizeof(p->bus_info));
172 }
173
174 static int
qcaspi_get_link_ksettings(struct net_device * dev,struct ethtool_link_ksettings * cmd)175 qcaspi_get_link_ksettings(struct net_device *dev,
176 struct ethtool_link_ksettings *cmd)
177 {
178 ethtool_link_ksettings_zero_link_mode(cmd, supported);
179 ethtool_link_ksettings_add_link_mode(cmd, supported, 10baseT_Half);
180
181 cmd->base.speed = SPEED_10;
182 cmd->base.duplex = DUPLEX_HALF;
183 cmd->base.port = PORT_OTHER;
184 cmd->base.autoneg = AUTONEG_DISABLE;
185
186 return 0;
187 }
188
189 static void
qcaspi_get_ethtool_stats(struct net_device * dev,struct ethtool_stats * estats,u64 * data)190 qcaspi_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *estats, u64 *data)
191 {
192 struct qcaspi *qca = netdev_priv(dev);
193 struct qcaspi_stats *st = &qca->stats;
194
195 memcpy(data, st, ARRAY_SIZE(qcaspi_gstrings_stats) * sizeof(u64));
196 }
197
198 static void
qcaspi_get_strings(struct net_device * dev,u32 stringset,u8 * buf)199 qcaspi_get_strings(struct net_device *dev, u32 stringset, u8 *buf)
200 {
201 switch (stringset) {
202 case ETH_SS_STATS:
203 memcpy(buf, &qcaspi_gstrings_stats,
204 sizeof(qcaspi_gstrings_stats));
205 break;
206 default:
207 WARN_ON(1);
208 break;
209 }
210 }
211
212 static int
qcaspi_get_sset_count(struct net_device * dev,int sset)213 qcaspi_get_sset_count(struct net_device *dev, int sset)
214 {
215 switch (sset) {
216 case ETH_SS_STATS:
217 return ARRAY_SIZE(qcaspi_gstrings_stats);
218 default:
219 return -EINVAL;
220 }
221 }
222
223 static int
qcaspi_get_regs_len(struct net_device * dev)224 qcaspi_get_regs_len(struct net_device *dev)
225 {
226 return sizeof(u32) * QCASPI_MAX_REGS;
227 }
228
229 static void
qcaspi_get_regs(struct net_device * dev,struct ethtool_regs * regs,void * p)230 qcaspi_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *p)
231 {
232 struct qcaspi *qca = netdev_priv(dev);
233 u32 *regs_buff = p;
234 unsigned int i;
235
236 regs->version = 1;
237 memset(regs_buff, 0, sizeof(u32) * QCASPI_MAX_REGS);
238
239 for (i = 0; i < ARRAY_SIZE(qcaspi_spi_regs); i++) {
240 u16 offset, value;
241
242 qcaspi_read_register(qca, qcaspi_spi_regs[i], &value);
243 offset = qcaspi_spi_regs[i] >> 8;
244 regs_buff[offset] = value;
245 }
246 }
247
248 static void
qcaspi_get_ringparam(struct net_device * dev,struct ethtool_ringparam * ring,struct kernel_ethtool_ringparam * kernel_ring,struct netlink_ext_ack * extack)249 qcaspi_get_ringparam(struct net_device *dev, struct ethtool_ringparam *ring,
250 struct kernel_ethtool_ringparam *kernel_ring,
251 struct netlink_ext_ack *extack)
252 {
253 struct qcaspi *qca = netdev_priv(dev);
254
255 ring->rx_max_pending = QCASPI_RX_MAX_FRAMES;
256 ring->tx_max_pending = TX_RING_MAX_LEN;
257 ring->rx_pending = QCASPI_RX_MAX_FRAMES;
258 ring->tx_pending = qca->txr.count;
259 }
260
261 static int
qcaspi_set_ringparam(struct net_device * dev,struct ethtool_ringparam * ring,struct kernel_ethtool_ringparam * kernel_ring,struct netlink_ext_ack * extack)262 qcaspi_set_ringparam(struct net_device *dev, struct ethtool_ringparam *ring,
263 struct kernel_ethtool_ringparam *kernel_ring,
264 struct netlink_ext_ack *extack)
265 {
266 struct qcaspi *qca = netdev_priv(dev);
267
268 if (ring->rx_pending != QCASPI_RX_MAX_FRAMES ||
269 (ring->rx_mini_pending) ||
270 (ring->rx_jumbo_pending))
271 return -EINVAL;
272
273 if (qca->spi_thread)
274 kthread_park(qca->spi_thread);
275
276 qca->txr.count = max_t(u32, ring->tx_pending, TX_RING_MIN_LEN);
277 qca->txr.count = min_t(u16, qca->txr.count, TX_RING_MAX_LEN);
278
279 if (qca->spi_thread)
280 kthread_unpark(qca->spi_thread);
281
282 return 0;
283 }
284
285 static const struct ethtool_ops qcaspi_ethtool_ops = {
286 .get_drvinfo = qcaspi_get_drvinfo,
287 .get_link = ethtool_op_get_link,
288 .get_ethtool_stats = qcaspi_get_ethtool_stats,
289 .get_strings = qcaspi_get_strings,
290 .get_sset_count = qcaspi_get_sset_count,
291 .get_regs_len = qcaspi_get_regs_len,
292 .get_regs = qcaspi_get_regs,
293 .get_ringparam = qcaspi_get_ringparam,
294 .set_ringparam = qcaspi_set_ringparam,
295 .get_link_ksettings = qcaspi_get_link_ksettings,
296 };
297
qcaspi_set_ethtool_ops(struct net_device * dev)298 void qcaspi_set_ethtool_ops(struct net_device *dev)
299 {
300 dev->ethtool_ops = &qcaspi_ethtool_ops;
301 }
302