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         "Write verify errors",
  64         "Buffer available errors",
  65 };
  66
  67 #ifdef CONFIG_DEBUG_FS
  68
  69 static int
  70 qcaspi_info_show(struct seq_file *s, void *what)
  71 {
  72         struct qcaspi *qca = s->private;
  73
  74         seq_printf(s, "RX buffer size   : %lu\n",
  75                    (unsigned long)qca->buffer_size);
  76
  77         seq_puts(s, "TX ring state    : ");
  78
  79         if (qca->txr.skb[qca->txr.head] == NULL)
  80                 seq_puts(s, "empty");
  81         else if (qca->txr.skb[qca->txr.tail])
  82                 seq_puts(s, "full");
  83         else
  84                 seq_puts(s, "in use");
  85
  86         seq_puts(s, "\n");
  87
  88         seq_printf(s, "TX ring size     : %u\n",
  89                    qca->txr.size);
  90
  91         seq_printf(s, "Sync state       : %u (",
  92                    (unsigned int)qca->sync);
  93         switch (qca->sync) {
  94         case QCASPI_SYNC_UNKNOWN:
  95                 seq_puts(s, "QCASPI_SYNC_UNKNOWN");
  96                 break;
  97         case QCASPI_SYNC_RESET:
  98                 seq_puts(s, "QCASPI_SYNC_RESET");
  99                 break;
 100         case QCASPI_SYNC_READY:
 101                 seq_puts(s, "QCASPI_SYNC_READY");
 102                 break;
 103         default:
 104                 seq_puts(s, "INVALID");
 105                 break;
 106         }
 107         seq_puts(s, ")\n");
 108
 109         seq_printf(s, "IRQ              : %d\n",
 110                    qca->spi_dev->irq);
 111         seq_printf(s, "INTR REQ         : %u\n",
 112                    qca->intr_req);
 113         seq_printf(s, "INTR SVC         : %u\n",
 114                    qca->intr_svc);
 115
 116         seq_printf(s, "SPI max speed    : %lu\n",
 117                    (unsigned long)qca->spi_dev->max_speed_hz);
 118         seq_printf(s, "SPI mode         : %x\n",
 119                    qca->spi_dev->mode);
 120         seq_printf(s, "SPI chip select  : %u\n",
 121                    (unsigned int)qca->spi_dev->chip_select);
 122         seq_printf(s, "SPI legacy mode  : %u\n",
 123                    (unsigned int)qca->legacy_mode);
 124         seq_printf(s, "SPI burst length : %u\n",
 125                    (unsigned int)qca->burst_len);
 126
 127         return 0;
 128 }
 129 DEFINE_SHOW_ATTRIBUTE(qcaspi_info);
 130
 131 void
 132 qcaspi_init_device_debugfs(struct qcaspi *qca)
 133 {
 134         struct dentry *device_root;
 135
 136         device_root = debugfs_create_dir(dev_name(&qca->net_dev->dev), NULL);
 137         qca->device_root = device_root;
 138
 139         if (IS_ERR(device_root) || !device_root) {
 140                 pr_warn("failed to create debugfs directory for %s\n",
 141                         dev_name(&qca->net_dev->dev));
 142                 return;
 143         }
 144         debugfs_create_file("info", S_IFREG | 0444, device_root, qca,
 145                             &qcaspi_info_fops);
 146 }
 147
 148 void
 149 qcaspi_remove_device_debugfs(struct qcaspi *qca)
 150 {
 151         debugfs_remove_recursive(qca->device_root);
 152 }
 153
 154 #else /* CONFIG_DEBUG_FS */
 155
 156 void
 157 qcaspi_init_device_debugfs(struct qcaspi *qca)
 158 {
 159 }
 160
 161 void
 162 qcaspi_remove_device_debugfs(struct qcaspi *qca)
 163 {
 164 }
 165
 166 #endif
 167
 168 static void
 169 qcaspi_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *p)
 170 {
 171         struct qcaspi *qca = netdev_priv(dev);
 172
 173         strlcpy(p->driver, QCASPI_DRV_NAME, sizeof(p->driver));
 174         strlcpy(p->version, QCASPI_DRV_VERSION, sizeof(p->version));
 175         strlcpy(p->fw_version, "QCA7000", sizeof(p->fw_version));
 176         strlcpy(p->bus_info, dev_name(&qca->spi_dev->dev),
 177                 sizeof(p->bus_info));
 178 }
 179
 180 static int
 181 qcaspi_get_link_ksettings(struct net_device *dev,
 182                           struct ethtool_link_ksettings *cmd)
 183 {
 184         ethtool_link_ksettings_zero_link_mode(cmd, supported);
 185         ethtool_link_ksettings_add_link_mode(cmd, supported, 10baseT_Half);
 186
 187         cmd->base.speed = SPEED_10;
 188         cmd->base.duplex = DUPLEX_HALF;
 189         cmd->base.port = PORT_OTHER;
 190         cmd->base.autoneg = AUTONEG_DISABLE;
 191
 192         return 0;
 193 }
 194
 195 static void
 196 qcaspi_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *estats, u64 *data)
 197 {
 198         struct qcaspi *qca = netdev_priv(dev);
 199         struct qcaspi_stats *st = &qca->stats;
 200
 201         memcpy(data, st, ARRAY_SIZE(qcaspi_gstrings_stats) * sizeof(u64));
 202 }
 203
 204 static void
 205 qcaspi_get_strings(struct net_device *dev, u32 stringset, u8 *buf)
 206 {
 207         switch (stringset) {
 208         case ETH_SS_STATS:
 209                 memcpy(buf, &qcaspi_gstrings_stats,
 210                        sizeof(qcaspi_gstrings_stats));
 211                 break;
 212         default:
 213                 WARN_ON(1);
 214                 break;
 215         }
 216 }
 217
 218 static int
 219 qcaspi_get_sset_count(struct net_device *dev, int sset)
 220 {
 221         switch (sset) {
 222         case ETH_SS_STATS:
 223                 return ARRAY_SIZE(qcaspi_gstrings_stats);
 224         default:
 225                 return -EINVAL;
 226         }
 227 }
 228
 229 static int
 230 qcaspi_get_regs_len(struct net_device *dev)
 231 {
 232         return sizeof(u32) * QCASPI_MAX_REGS;
 233 }
 234
 235 static void
 236 qcaspi_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *p)
 237 {
 238         struct qcaspi *qca = netdev_priv(dev);
 239         u32 *regs_buff = p;
 240         unsigned int i;
 241
 242         regs->version = 1;
 243         memset(regs_buff, 0, sizeof(u32) * QCASPI_MAX_REGS);
 244
 245         for (i = 0; i < ARRAY_SIZE(qcaspi_spi_regs); i++) {
 246                 u16 offset, value;
 247
 248                 qcaspi_read_register(qca, qcaspi_spi_regs[i], &value);
 249                 offset = qcaspi_spi_regs[i] >> 8;
 250                 regs_buff[offset] = value;
 251         }
 252 }
 253
 254 static void
 255 qcaspi_get_ringparam(struct net_device *dev, struct ethtool_ringparam *ring)
 256 {
 257         struct qcaspi *qca = netdev_priv(dev);
 258
 259         ring->rx_max_pending = 4;
 260         ring->tx_max_pending = TX_RING_MAX_LEN;
 261         ring->rx_pending = 4;
 262         ring->tx_pending = qca->txr.count;
 263 }
 264
 265 static int
 266 qcaspi_set_ringparam(struct net_device *dev, struct ethtool_ringparam *ring)
 267 {
 268         const struct net_device_ops *ops = dev->netdev_ops;
 269         struct qcaspi *qca = netdev_priv(dev);
 270
 271         if ((ring->rx_pending) ||
 272             (ring->rx_mini_pending) ||
 273             (ring->rx_jumbo_pending))
 274                 return -EINVAL;
 275
 276         if (netif_running(dev))
 277                 ops->ndo_stop(dev);
 278
 279         qca->txr.count = max_t(u32, ring->tx_pending, TX_RING_MIN_LEN);
 280         qca->txr.count = min_t(u16, qca->txr.count, TX_RING_MAX_LEN);
 281
 282         if (netif_running(dev))
 283                 ops->ndo_open(dev);
 284
 285         return 0;
 286 }
 287
 288 static const struct ethtool_ops qcaspi_ethtool_ops = {
 289         .get_drvinfo = qcaspi_get_drvinfo,
 290         .get_link = ethtool_op_get_link,
 291         .get_ethtool_stats = qcaspi_get_ethtool_stats,
 292         .get_strings = qcaspi_get_strings,
 293         .get_sset_count = qcaspi_get_sset_count,
 294         .get_regs_len = qcaspi_get_regs_len,
 295         .get_regs = qcaspi_get_regs,
 296         .get_ringparam = qcaspi_get_ringparam,
 297         .set_ringparam = qcaspi_set_ringparam,
 298         .get_link_ksettings = qcaspi_get_link_ksettings,
 299 };
 300
 301 void qcaspi_set_ethtool_ops(struct net_device *dev)
 302 {
 303         dev->ethtool_ops = &qcaspi_ethtool_ops;
 304 }