drivers/net/ethernet/qualcomm/qca_debug.c

   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_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
 203 static void
 204 qcaspi_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
 212 static void
 213 qcaspi_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
 226 static int
 227 qcaspi_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
 237 static int
 238 qcaspi_get_regs_len(struct net_device *dev)
 239 {
 240         return sizeof(u32) * QCASPI_MAX_REGS;
 241 }
 242
 243 static void
 244 qcaspi_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
 262 static void
 263 qcaspi_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
 273 static int
 274 qcaspi_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
 295 static 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
 308 void qcaspi_set_ethtool_ops(struct net_device *dev)
 309 {
 310         dev->ethtool_ops = &qcaspi_ethtool_ops;
 311 }