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 static 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 */ 51 static 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 67 static int 68 qcaspi_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 } 127 128 static int 129 qcaspi_info_open(struct inode *inode, struct file *file) 130 { 131 return single_open(file, qcaspi_info_show, inode->i_private); 132 } 133 134 static 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 }; 140 141 void 142 qcaspi_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 } 157 158 void 159 qcaspi_remove_device_debugfs(struct qcaspi *qca) 160 { 161 debugfs_remove_recursive(qca->device_root); 162 } 163 164 #else /* CONFIG_DEBUG_FS */ 165 166 void 167 qcaspi_init_device_debugfs(struct qcaspi *qca) 168 { 169 } 170 171 void 172 qcaspi_remove_device_debugfs(struct qcaspi *qca) 173 { 174 } 175 176 #endif 177 178 static void 179 qcaspi_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 } 189 190 static int 191 qcaspi_get_link_ksettings(struct net_device *dev, 192 struct ethtool_link_ksettings *cmd) 193 { 194 ethtool_link_ksettings_zero_link_mode(cmd, supported); 195 ethtool_link_ksettings_add_link_mode(cmd, supported, 10baseT_Half); 196 197 cmd->base.speed = SPEED_10; 198 cmd->base.duplex = DUPLEX_HALF; 199 cmd->base.port = PORT_OTHER; 200 cmd->base.autoneg = AUTONEG_DISABLE; 201 202 return 0; 203 } 204 205 static void 206 qcaspi_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *estats, u64 *data) 207 { 208 struct qcaspi *qca = netdev_priv(dev); 209 struct qcaspi_stats *st = &qca->stats; 210 211 memcpy(data, st, ARRAY_SIZE(qcaspi_gstrings_stats) * sizeof(u64)); 212 } 213 214 static void 215 qcaspi_get_strings(struct net_device *dev, u32 stringset, u8 *buf) 216 { 217 switch (stringset) { 218 case ETH_SS_STATS: 219 memcpy(buf, &qcaspi_gstrings_stats, 220 sizeof(qcaspi_gstrings_stats)); 221 break; 222 default: 223 WARN_ON(1); 224 break; 225 } 226 } 227 228 static int 229 qcaspi_get_sset_count(struct net_device *dev, int sset) 230 { 231 switch (sset) { 232 case ETH_SS_STATS: 233 return ARRAY_SIZE(qcaspi_gstrings_stats); 234 default: 235 return -EINVAL; 236 } 237 } 238 239 static int 240 qcaspi_get_regs_len(struct net_device *dev) 241 { 242 return sizeof(u32) * QCASPI_MAX_REGS; 243 } 244 245 static void 246 qcaspi_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *p) 247 { 248 struct qcaspi *qca = netdev_priv(dev); 249 u32 *regs_buff = p; 250 unsigned int i; 251 252 regs->version = 1; 253 memset(regs_buff, 0, sizeof(u32) * QCASPI_MAX_REGS); 254 255 for (i = 0; i < ARRAY_SIZE(qcaspi_spi_regs); i++) { 256 u16 offset, value; 257 258 qcaspi_read_register(qca, qcaspi_spi_regs[i], &value); 259 offset = qcaspi_spi_regs[i] >> 8; 260 regs_buff[offset] = value; 261 } 262 } 263 264 static void 265 qcaspi_get_ringparam(struct net_device *dev, struct ethtool_ringparam *ring) 266 { 267 struct qcaspi *qca = netdev_priv(dev); 268 269 ring->rx_max_pending = 4; 270 ring->tx_max_pending = TX_RING_MAX_LEN; 271 ring->rx_pending = 4; 272 ring->tx_pending = qca->txr.count; 273 } 274 275 static int 276 qcaspi_set_ringparam(struct net_device *dev, struct ethtool_ringparam *ring) 277 { 278 struct qcaspi *qca = netdev_priv(dev); 279 280 if ((ring->rx_pending) || 281 (ring->rx_mini_pending) || 282 (ring->rx_jumbo_pending)) 283 return -EINVAL; 284 285 if (netif_running(dev)) 286 qcaspi_netdev_close(dev); 287 288 qca->txr.count = max_t(u32, ring->tx_pending, TX_RING_MIN_LEN); 289 qca->txr.count = min_t(u16, qca->txr.count, TX_RING_MAX_LEN); 290 291 if (netif_running(dev)) 292 qcaspi_netdev_open(dev); 293 294 return 0; 295 } 296 297 static const struct ethtool_ops qcaspi_ethtool_ops = { 298 .get_drvinfo = qcaspi_get_drvinfo, 299 .get_link = ethtool_op_get_link, 300 .get_ethtool_stats = qcaspi_get_ethtool_stats, 301 .get_strings = qcaspi_get_strings, 302 .get_sset_count = qcaspi_get_sset_count, 303 .get_regs_len = qcaspi_get_regs_len, 304 .get_regs = qcaspi_get_regs, 305 .get_ringparam = qcaspi_get_ringparam, 306 .set_ringparam = qcaspi_set_ringparam, 307 .get_link_ksettings = qcaspi_get_link_ksettings, 308 }; 309 310 void qcaspi_set_ethtool_ops(struct net_device *dev) 311 { 312 dev->ethtool_ops = &qcaspi_ethtool_ops; 313 } 314