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         "Bad signature",
  66 };
  67
  68 #ifdef CONFIG_DEBUG_FS
  69
  70 static int
  71 qcaspi_info_show(struct seq_file *s, void *what)
  72 {
  73         struct qcaspi *qca = s->private;
  74
  75         seq_printf(s, "RX buffer size   : %lu\n",
  76                    (unsigned long)qca->buffer_size);
  77
  78         seq_puts(s, "TX ring state    : ");
  79
  80         if (qca->txr.skb[qca->txr.head] == NULL)
  81                 seq_puts(s, "empty");
  82         else if (qca->txr.skb[qca->txr.tail])
  83                 seq_puts(s, "full");
  84         else
  85                 seq_puts(s, "in use");
  86
  87         seq_puts(s, "\n");
  88
  89         seq_printf(s, "TX ring size     : %u\n",
  90                    qca->txr.size);
  91
  92         seq_printf(s, "Sync state       : %u (",
  93                    (unsigned int)qca->sync);
  94         switch (qca->sync) {
  95         case QCASPI_SYNC_UNKNOWN:
  96                 seq_puts(s, "QCASPI_SYNC_UNKNOWN");
  97                 break;
  98         case QCASPI_SYNC_RESET:
  99                 seq_puts(s, "QCASPI_SYNC_RESET");
 100                 break;
 101         case QCASPI_SYNC_READY:
 102                 seq_puts(s, "QCASPI_SYNC_READY");
 103                 break;
 104         default:
 105                 seq_puts(s, "INVALID");
 106                 break;
 107         }
 108         seq_puts(s, ")\n");
 109
 110         seq_printf(s, "IRQ              : %d\n",
 111                    qca->spi_dev->irq);
 112         seq_printf(s, "INTR REQ         : %u\n",
 113                    qca->intr_req);
 114         seq_printf(s, "INTR SVC         : %u\n",
 115                    qca->intr_svc);
 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
 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
 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
 151 qcaspi_init_device_debugfs(struct qcaspi *qca)
 152 {
 153 }
 154
 155 void
 156 qcaspi_remove_device_debugfs(struct qcaspi *qca)
 157 {
 158 }
 159
 160 #endif
 161
 162 static void
 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
 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
 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
 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
 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
 224 qcaspi_get_regs_len(struct net_device *dev)
 225 {
 226         return sizeof(u32) * QCASPI_MAX_REGS;
 227 }
 228
 229 static void
 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
 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 = 4;
 256         ring->tx_max_pending = TX_RING_MAX_LEN;
 257         ring->rx_pending = 4;
 258         ring->tx_pending = qca->txr.count;
 259 }
 260
 261 static int
 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) ||
 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
 298 void qcaspi_set_ethtool_ops(struct net_device *dev)
 299 {
 300         dev->ethtool_ops = &qcaspi_ethtool_ops;
 301 }