drivers/net/wireless/ath/wil6210/netdev.c

   1 /*
   2  * Copyright (c) 2012-2017 Qualcomm Atheros, Inc.
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include <linux/moduleparam.h>
  18 #include <linux/etherdevice.h>
  19 #include "wil6210.h"
  20 #include "txrx.h"
  21
  22 static bool alt_ifname; /* = false; */
  23 module_param(alt_ifname, bool, S_IRUGO);
  24 MODULE_PARM_DESC(alt_ifname, " use an alternate interface name wigigN instead of wlanN");
  25
  26 static int wil_open(struct net_device *ndev)
  27 {
  28         struct wil6210_priv *wil = ndev_to_wil(ndev);
  29
  30         wil_dbg_misc(wil, "open\n");
  31
  32         if (debug_fw ||
  33             test_bit(WMI_FW_CAPABILITY_WMI_ONLY, wil->fw_capabilities)) {
  34                 wil_err(wil, "while in debug_fw or wmi_only mode\n");
  35                 return -EINVAL;
  36         }
  37
  38         return wil_up(wil);
  39 }
  40
  41 static int wil_stop(struct net_device *ndev)
  42 {
  43         struct wil6210_priv *wil = ndev_to_wil(ndev);
  44
  45         wil_dbg_misc(wil, "stop\n");
  46
  47         return wil_down(wil);
  48 }
  49
  50 static int wil_change_mtu(struct net_device *ndev, int new_mtu)
  51 {
  52         struct wil6210_priv *wil = ndev_to_wil(ndev);
  53
  54         if (new_mtu < 68 || new_mtu > mtu_max) {
  55                 wil_err(wil, "invalid MTU %d\n", new_mtu);
  56                 return -EINVAL;
  57         }
  58
  59         wil_dbg_misc(wil, "change MTU %d -> %d\n", ndev->mtu, new_mtu);
  60         ndev->mtu = new_mtu;
  61
  62         return 0;
  63 }
  64
  65 static int wil_do_ioctl(struct net_device *ndev, struct ifreq *ifr, int cmd)
  66 {
  67         struct wil6210_priv *wil = ndev_to_wil(ndev);
  68
  69         return wil_ioctl(wil, ifr->ifr_data, cmd);
  70 }
  71
  72 static const struct net_device_ops wil_netdev_ops = {
  73         .ndo_open               = wil_open,
  74         .ndo_stop               = wil_stop,
  75         .ndo_start_xmit         = wil_start_xmit,
  76         .ndo_set_mac_address    = eth_mac_addr,
  77         .ndo_validate_addr      = eth_validate_addr,
  78         .ndo_change_mtu         = wil_change_mtu,
  79         .ndo_do_ioctl           = wil_do_ioctl,
  80 };
  81
  82 static int wil6210_netdev_poll_rx(struct napi_struct *napi, int budget)
  83 {
  84         struct wil6210_priv *wil = container_of(napi, struct wil6210_priv,
  85                                                 napi_rx);
  86         int quota = budget;
  87         int done;
  88
  89         wil_rx_handle(wil, &quota);
  90         done = budget - quota;
  91
  92         if (done < budget) {
  93                 napi_complete_done(napi, done);
  94                 wil6210_unmask_irq_rx(wil);
  95                 wil_dbg_txrx(wil, "NAPI RX complete\n");
  96         }
  97
  98         wil_dbg_txrx(wil, "NAPI RX poll(%d) done %d\n", budget, done);
  99
 100         return done;
 101 }
 102
 103 static int wil6210_netdev_poll_tx(struct napi_struct *napi, int budget)
 104 {
 105         struct wil6210_priv *wil = container_of(napi, struct wil6210_priv,
 106                                                 napi_tx);
 107         int tx_done = 0;
 108         uint i;
 109
 110         /* always process ALL Tx complete, regardless budget - it is fast */
 111         for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
 112                 struct vring *vring = &wil->vring_tx[i];
 113                 struct vring_tx_data *txdata = &wil->vring_tx_data[i];
 114
 115                 if (!vring->va || !txdata->enabled)
 116                         continue;
 117
 118                 tx_done += wil_tx_complete(wil, i);
 119         }
 120
 121         if (tx_done < budget) {
 122                 napi_complete(napi);
 123                 wil6210_unmask_irq_tx(wil);
 124                 wil_dbg_txrx(wil, "NAPI TX complete\n");
 125         }
 126
 127         wil_dbg_txrx(wil, "NAPI TX poll(%d) done %d\n", budget, tx_done);
 128
 129         return min(tx_done, budget);
 130 }
 131
 132 static void wil_dev_setup(struct net_device *dev)
 133 {
 134         ether_setup(dev);
 135         dev->tx_queue_len = WIL_TX_Q_LEN_DEFAULT;
 136 }
 137
 138 void *wil_if_alloc(struct device *dev)
 139 {
 140         struct net_device *ndev;
 141         struct wireless_dev *wdev;
 142         struct wil6210_priv *wil;
 143         struct ieee80211_channel *ch;
 144         int rc = 0;
 145         const char *ifname = alt_ifname ? "wigig%d" : "wlan%d";
 146
 147         wdev = wil_cfg80211_init(dev);
 148         if (IS_ERR(wdev)) {
 149                 dev_err(dev, "wil_cfg80211_init failed\n");
 150                 return wdev;
 151         }
 152
 153         wil = wdev_to_wil(wdev);
 154         wil->wdev = wdev;
 155         wil->radio_wdev = wdev;
 156
 157         wil_dbg_misc(wil, "if_alloc\n");
 158
 159         rc = wil_priv_init(wil);
 160         if (rc) {
 161                 dev_err(dev, "wil_priv_init failed\n");
 162                 goto out_wdev;
 163         }
 164
 165         wdev->iftype = NL80211_IFTYPE_STATION; /* TODO */
 166         /* default monitor channel */
 167         ch = wdev->wiphy->bands[NL80211_BAND_60GHZ]->channels;
 168         cfg80211_chandef_create(&wdev->preset_chandef, ch, NL80211_CHAN_NO_HT);
 169
 170         ndev = alloc_netdev(0, ifname, NET_NAME_UNKNOWN, wil_dev_setup);
 171         if (!ndev) {
 172                 dev_err(dev, "alloc_netdev_mqs failed\n");
 173                 rc = -ENOMEM;
 174                 goto out_priv;
 175         }
 176
 177         ndev->netdev_ops = &wil_netdev_ops;
 178         wil_set_ethtoolops(ndev);
 179         ndev->ieee80211_ptr = wdev;
 180         ndev->hw_features = NETIF_F_HW_CSUM | NETIF_F_RXCSUM |
 181                             NETIF_F_SG | NETIF_F_GRO |
 182                             NETIF_F_TSO | NETIF_F_TSO6 |
 183                             NETIF_F_RXHASH;
 184
 185         ndev->features |= ndev->hw_features;
 186         SET_NETDEV_DEV(ndev, wiphy_dev(wdev->wiphy));
 187         wdev->netdev = ndev;
 188
 189         return wil;
 190
 191  out_priv:
 192         wil_priv_deinit(wil);
 193
 194  out_wdev:
 195         wil_wdev_free(wil);
 196
 197         return ERR_PTR(rc);
 198 }
 199
 200 void wil_if_free(struct wil6210_priv *wil)
 201 {
 202         struct net_device *ndev = wil_to_ndev(wil);
 203
 204         wil_dbg_misc(wil, "if_free\n");
 205
 206         if (!ndev)
 207                 return;
 208
 209         wil_priv_deinit(wil);
 210
 211         wil_to_ndev(wil) = NULL;
 212         free_netdev(ndev);
 213
 214         wil_wdev_free(wil);
 215 }
 216
 217 int wil_if_add(struct wil6210_priv *wil)
 218 {
 219         struct wireless_dev *wdev = wil_to_wdev(wil);
 220         struct wiphy *wiphy = wdev->wiphy;
 221         struct net_device *ndev = wil_to_ndev(wil);
 222         int rc;
 223
 224         wil_dbg_misc(wil, "entered");
 225
 226         strlcpy(wiphy->fw_version, wil->fw_version, sizeof(wiphy->fw_version));
 227
 228         rc = wiphy_register(wiphy);
 229         if (rc < 0) {
 230                 wil_err(wil, "failed to register wiphy, err %d\n", rc);
 231                 return rc;
 232         }
 233
 234         netif_napi_add(ndev, &wil->napi_rx, wil6210_netdev_poll_rx,
 235                        WIL6210_NAPI_BUDGET);
 236         netif_napi_add(ndev, &wil->napi_tx, wil6210_netdev_poll_tx,
 237                        WIL6210_NAPI_BUDGET);
 238
 239         wil_update_net_queues_bh(wil, NULL, true);
 240
 241         rc = register_netdev(ndev);
 242         if (rc < 0) {
 243                 dev_err(&ndev->dev, "Failed to register netdev: %d\n", rc);
 244                 goto out_wiphy;
 245         }
 246
 247         return 0;
 248
 249 out_wiphy:
 250         wiphy_unregister(wdev->wiphy);
 251         return rc;
 252 }
 253
 254 void wil_if_remove(struct wil6210_priv *wil)
 255 {
 256         struct net_device *ndev = wil_to_ndev(wil);
 257         struct wireless_dev *wdev = wil_to_wdev(wil);
 258
 259         wil_dbg_misc(wil, "if_remove\n");
 260
 261         unregister_netdev(ndev);
 262         wiphy_unregister(wdev->wiphy);
 263 }