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
33static const u16 qcaspi_spi_regs[] = {
34	SPI_REG_BFR_SIZE,
35	SPI_REG_WRBUF_SPC_AVA,
36	SPI_REG_RDBUF_BYTE_AVA,
37	SPI_REG_SPI_CONFIG,
38	SPI_REG_SPI_STATUS,
39	SPI_REG_INTR_CAUSE,
40	SPI_REG_INTR_ENABLE,
41	SPI_REG_RDBUF_WATERMARK,
42	SPI_REG_WRBUF_WATERMARK,
43	SPI_REG_SIGNATURE,
44	SPI_REG_ACTION_CTRL
45};
46
47/* The order of these strings must match the order of the fields in
48 * struct qcaspi_stats
49 * See qca_spi.h
50 */
51static const char qcaspi_gstrings_stats[][ETH_GSTRING_LEN] = {
52	"Triggered resets",
53	"Device resets",
54	"Reset timeouts",
55	"Read errors",
56	"Write errors",
57	"Read buffer errors",
58	"Write buffer errors",
59	"Out of memory",
60	"Write buffer misses",
61	"Transmit ring full",
62	"SPI errors",
63};
64
65#ifdef CONFIG_DEBUG_FS
66
67static int
68qcaspi_info_show(struct seq_file *s, void *what)
69{
70	struct qcaspi *qca = s->private;
71
72	seq_printf(s, "RX buffer size   : %lu\n",
73		   (unsigned long)qca->buffer_size);
74
75	seq_puts(s, "TX ring state    : ");
76
77	if (qca->txr.skb[qca->txr.head] == NULL)
78		seq_puts(s, "empty");
79	else if (qca->txr.skb[qca->txr.tail])
80		seq_puts(s, "full");
81	else
82		seq_puts(s, "in use");
83
84	seq_puts(s, "\n");
85
86	seq_printf(s, "TX ring size     : %u\n",
87		   qca->txr.size);
88
89	seq_printf(s, "Sync state       : %u (",
90		   (unsigned int)qca->sync);
91	switch (qca->sync) {
92	case QCASPI_SYNC_UNKNOWN:
93		seq_puts(s, "QCASPI_SYNC_UNKNOWN");
94		break;
95	case QCASPI_SYNC_RESET:
96		seq_puts(s, "QCASPI_SYNC_RESET");
97		break;
98	case QCASPI_SYNC_READY:
99		seq_puts(s, "QCASPI_SYNC_READY");
100		break;
101	default:
102		seq_puts(s, "INVALID");
103		break;
104	}
105	seq_puts(s, ")\n");
106
107	seq_printf(s, "IRQ              : %d\n",
108		   qca->spi_dev->irq);
109	seq_printf(s, "INTR REQ         : %u\n",
110		   qca->intr_req);
111	seq_printf(s, "INTR SVC         : %u\n",
112		   qca->intr_svc);
113
114	seq_printf(s, "SPI max speed    : %lu\n",
115		   (unsigned long)qca->spi_dev->max_speed_hz);
116	seq_printf(s, "SPI mode         : %x\n",
117		   qca->spi_dev->mode);
118	seq_printf(s, "SPI chip select  : %u\n",
119		   (unsigned int)qca->spi_dev->chip_select);
120	seq_printf(s, "SPI legacy mode  : %u\n",
121		   (unsigned int)qca->legacy_mode);
122	seq_printf(s, "SPI burst length : %u\n",
123		   (unsigned int)qca->burst_len);
124
125	return 0;
126}
127
128static int
129qcaspi_info_open(struct inode *inode, struct file *file)
130{
131	return single_open(file, qcaspi_info_show, inode->i_private);
132}
133
134static const struct file_operations qcaspi_info_ops = {
135	.open = qcaspi_info_open,
136	.read = seq_read,
137	.llseek = seq_lseek,
138	.release = single_release,
139};
140
141void
142qcaspi_init_device_debugfs(struct qcaspi *qca)
143{
144	struct dentry *device_root;
145
146	device_root = debugfs_create_dir(dev_name(&qca->net_dev->dev), NULL);
147	qca->device_root = device_root;
148
149	if (IS_ERR(device_root) || !device_root) {
150		pr_warn("failed to create debugfs directory for %s\n",
151			dev_name(&qca->net_dev->dev));
152		return;
153	}
154	debugfs_create_file("info", S_IFREG | S_IRUGO, device_root, qca,
155			    &qcaspi_info_ops);
156}
157
158void
159qcaspi_remove_device_debugfs(struct qcaspi *qca)
160{
161	debugfs_remove_recursive(qca->device_root);
162}
163
164#else /* CONFIG_DEBUG_FS */
165
166void
167qcaspi_init_device_debugfs(struct qcaspi *qca)
168{
169}
170
171void
172qcaspi_remove_device_debugfs(struct qcaspi *qca)
173{
174}
175
176#endif
177
178static void
179qcaspi_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *p)
180{
181	struct qcaspi *qca = netdev_priv(dev);
182
183	strlcpy(p->driver, QCASPI_DRV_NAME, sizeof(p->driver));
184	strlcpy(p->version, QCASPI_DRV_VERSION, sizeof(p->version));
185	strlcpy(p->fw_version, "QCA7000", sizeof(p->fw_version));
186	strlcpy(p->bus_info, dev_name(&qca->spi_dev->dev),
187		sizeof(p->bus_info));
188}
189
190static int
191qcaspi_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
192{
193	cmd->transceiver = XCVR_INTERNAL;
194	cmd->supported = SUPPORTED_10baseT_Half;
195	ethtool_cmd_speed_set(cmd,  SPEED_10);
196	cmd->duplex = DUPLEX_HALF;
197	cmd->port = PORT_OTHER;
198	cmd->autoneg = AUTONEG_DISABLE;
199
200	return 0;
201}
202
203static void
204qcaspi_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *estats, u64 *data)
205{
206	struct qcaspi *qca = netdev_priv(dev);
207	struct qcaspi_stats *st = &qca->stats;
208
209	memcpy(data, st, ARRAY_SIZE(qcaspi_gstrings_stats) * sizeof(u64));
210}
211
212static void
213qcaspi_get_strings(struct net_device *dev, u32 stringset, u8 *buf)
214{
215	switch (stringset) {
216	case ETH_SS_STATS:
217		memcpy(buf, &qcaspi_gstrings_stats,
218		       sizeof(qcaspi_gstrings_stats));
219		break;
220	default:
221		WARN_ON(1);
222		break;
223	}
224}
225
226static int
227qcaspi_get_sset_count(struct net_device *dev, int sset)
228{
229	switch (sset) {
230	case ETH_SS_STATS:
231		return ARRAY_SIZE(qcaspi_gstrings_stats);
232	default:
233		return -EINVAL;
234	}
235}
236
237static int
238qcaspi_get_regs_len(struct net_device *dev)
239{
240	return sizeof(u32) * QCASPI_MAX_REGS;
241}
242
243static void
244qcaspi_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *p)
245{
246	struct qcaspi *qca = netdev_priv(dev);
247	u32 *regs_buff = p;
248	unsigned int i;
249
250	regs->version = 1;
251	memset(regs_buff, 0, sizeof(u32) * QCASPI_MAX_REGS);
252
253	for (i = 0; i < ARRAY_SIZE(qcaspi_spi_regs); i++) {
254		u16 offset, value;
255
256		qcaspi_read_register(qca, qcaspi_spi_regs[i], &value);
257		offset = qcaspi_spi_regs[i] >> 8;
258		regs_buff[offset] = value;
259	}
260}
261
262static void
263qcaspi_get_ringparam(struct net_device *dev, struct ethtool_ringparam *ring)
264{
265	struct qcaspi *qca = netdev_priv(dev);
266
267	ring->rx_max_pending = 4;
268	ring->tx_max_pending = TX_RING_MAX_LEN;
269	ring->rx_pending = 4;
270	ring->tx_pending = qca->txr.count;
271}
272
273static int
274qcaspi_set_ringparam(struct net_device *dev, struct ethtool_ringparam *ring)
275{
276	struct qcaspi *qca = netdev_priv(dev);
277
278	if ((ring->rx_pending) ||
279	    (ring->rx_mini_pending) ||
280	    (ring->rx_jumbo_pending))
281		return -EINVAL;
282
283	if (netif_running(dev))
284		qcaspi_netdev_close(dev);
285
286	qca->txr.count = max_t(u32, ring->tx_pending, TX_RING_MIN_LEN);
287	qca->txr.count = min_t(u16, qca->txr.count, TX_RING_MAX_LEN);
288
289	if (netif_running(dev))
290		qcaspi_netdev_open(dev);
291
292	return 0;
293}
294
295static const struct ethtool_ops qcaspi_ethtool_ops = {
296	.get_drvinfo = qcaspi_get_drvinfo,
297	.get_link = ethtool_op_get_link,
298	.get_settings = qcaspi_get_settings,
299	.get_ethtool_stats = qcaspi_get_ethtool_stats,
300	.get_strings = qcaspi_get_strings,
301	.get_sset_count = qcaspi_get_sset_count,
302	.get_regs_len = qcaspi_get_regs_len,
303	.get_regs = qcaspi_get_regs,
304	.get_ringparam = qcaspi_get_ringparam,
305	.set_ringparam = qcaspi_set_ringparam,
306};
307
308void qcaspi_set_ethtool_ops(struct net_device *dev)
309{
310	dev->ethtool_ops = &qcaspi_ethtool_ops;
311}
312