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

   1 /*
   2  * Copyright (c) 2012-2015 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/etherdevice.h>
  18 #include "wil6210.h"
  19 #include "txrx.h"
  20
  21 static int wil_open(struct net_device *ndev)
  22 {
  23         struct wil6210_priv *wil = ndev_to_wil(ndev);
  24
  25         wil_dbg_misc(wil, "%s()\n", __func__);
  26
  27         if (debug_fw) {
  28                 wil_err(wil, "%s() while in debug_fw mode\n", __func__);
  29                 return -EINVAL;
  30         }
  31
  32         return wil_up(wil);
  33 }
  34
  35 static int wil_stop(struct net_device *ndev)
  36 {
  37         struct wil6210_priv *wil = ndev_to_wil(ndev);
  38
  39         wil_dbg_misc(wil, "%s()\n", __func__);
  40
  41         return wil_down(wil);
  42 }
  43
  44 static int wil_change_mtu(struct net_device *ndev, int new_mtu)
  45 {
  46         struct wil6210_priv *wil = ndev_to_wil(ndev);
  47
  48         if (new_mtu < 68 || new_mtu > mtu_max) {
  49                 wil_err(wil, "invalid MTU %d\n", new_mtu);
  50                 return -EINVAL;
  51         }
  52
  53         wil_dbg_misc(wil, "change MTU %d -> %d\n", ndev->mtu, new_mtu);
  54         ndev->mtu = new_mtu;
  55
  56         return 0;
  57 }
  58
  59 static int wil_do_ioctl(struct net_device *ndev, struct ifreq *ifr, int cmd)
  60 {
  61         struct wil6210_priv *wil = ndev_to_wil(ndev);
  62
  63         int ret = wil_ioctl(wil, ifr->ifr_data, cmd);
  64
  65         wil_dbg_misc(wil, "ioctl(0x%04x) -> %d\n", cmd, ret);
  66
  67         return ret;
  68 }
  69
  70 static const struct net_device_ops wil_netdev_ops = {
  71         .ndo_open               = wil_open,
  72         .ndo_stop               = wil_stop,
  73         .ndo_start_xmit         = wil_start_xmit,
  74         .ndo_set_mac_address    = eth_mac_addr,
  75         .ndo_validate_addr      = eth_validate_addr,
  76         .ndo_change_mtu         = wil_change_mtu,
  77         .ndo_do_ioctl           = wil_do_ioctl,
  78 };
  79
  80 static int wil6210_netdev_poll_rx(struct napi_struct *napi, int budget)
  81 {
  82         struct wil6210_priv *wil = container_of(napi, struct wil6210_priv,
  83                                                 napi_rx);
  84         int quota = budget;
  85         int done;
  86
  87         wil_rx_handle(wil, &quota);
  88         done = budget - quota;
  89
  90         if (done < budget) {
  91                 napi_complete(napi);
  92                 wil6210_unmask_irq_rx(wil);
  93                 wil_dbg_txrx(wil, "NAPI RX complete\n");
  94         }
  95
  96         wil_dbg_txrx(wil, "NAPI RX poll(%d) done %d\n", budget, done);
  97
  98         return done;
  99 }
 100
 101 static int wil6210_netdev_poll_tx(struct napi_struct *napi, int budget)
 102 {
 103         struct wil6210_priv *wil = container_of(napi, struct wil6210_priv,
 104                                                 napi_tx);
 105         int tx_done = 0;
 106         uint i;
 107
 108         /* always process ALL Tx complete, regardless budget - it is fast */
 109         for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
 110                 struct vring *vring = &wil->vring_tx[i];
 111
 112                 if (!vring->va)
 113                         continue;
 114
 115                 tx_done += wil_tx_complete(wil, i);
 116         }
 117
 118         if (tx_done < budget) {
 119                 napi_complete(napi);
 120                 wil6210_unmask_irq_tx(wil);
 121                 wil_dbg_txrx(wil, "NAPI TX complete\n");
 122         }
 123
 124         wil_dbg_txrx(wil, "NAPI TX poll(%d) done %d\n", budget, tx_done);
 125
 126         return min(tx_done, budget);
 127 }
 128
 129 static void wil_dev_setup(struct net_device *dev)
 130 {
 131         ether_setup(dev);
 132         dev->tx_queue_len = WIL_TX_Q_LEN_DEFAULT;
 133 }
 134
 135 void *wil_if_alloc(struct device *dev)
 136 {
 137         struct net_device *ndev;
 138         struct wireless_dev *wdev;
 139         struct wil6210_priv *wil;
 140         struct ieee80211_channel *ch;
 141         int rc = 0;
 142
 143         wdev = wil_cfg80211_init(dev);
 144         if (IS_ERR(wdev)) {
 145                 dev_err(dev, "wil_cfg80211_init failed\n");
 146                 return wdev;
 147         }
 148
 149         wil = wdev_to_wil(wdev);
 150         wil->wdev = wdev;
 151
 152         wil_dbg_misc(wil, "%s()\n", __func__);
 153
 154         rc = wil_priv_init(wil);
 155         if (rc) {
 156                 dev_err(dev, "wil_priv_init failed\n");
 157                 goto out_wdev;
 158         }
 159
 160         wdev->iftype = NL80211_IFTYPE_STATION; /* TODO */
 161         /* default monitor channel */
 162         ch = wdev->wiphy->bands[IEEE80211_BAND_60GHZ]->channels;
 163         cfg80211_chandef_create(&wdev->preset_chandef, ch, NL80211_CHAN_NO_HT);
 164
 165         ndev = alloc_netdev(0, "wlan%d", NET_NAME_UNKNOWN, wil_dev_setup);
 166         if (!ndev) {
 167                 dev_err(dev, "alloc_netdev_mqs failed\n");
 168                 rc = -ENOMEM;
 169                 goto out_priv;
 170         }
 171
 172         ndev->netdev_ops = &wil_netdev_ops;
 173         wil_set_ethtoolops(ndev);
 174         ndev->ieee80211_ptr = wdev;
 175         ndev->hw_features = NETIF_F_HW_CSUM | NETIF_F_RXCSUM |
 176                             NETIF_F_SG | NETIF_F_GRO |
 177                             NETIF_F_TSO | NETIF_F_TSO6 |
 178                             NETIF_F_RXHASH;
 179
 180         ndev->features |= ndev->hw_features;
 181         SET_NETDEV_DEV(ndev, wiphy_dev(wdev->wiphy));
 182         wdev->netdev = ndev;
 183
 184         netif_napi_add(ndev, &wil->napi_rx, wil6210_netdev_poll_rx,
 185                        WIL6210_NAPI_BUDGET);
 186         netif_napi_add(ndev, &wil->napi_tx, wil6210_netdev_poll_tx,
 187                        WIL6210_NAPI_BUDGET);
 188
 189         netif_tx_stop_all_queues(ndev);
 190
 191         return wil;
 192
 193  out_priv:
 194         wil_priv_deinit(wil);
 195
 196  out_wdev:
 197         wil_wdev_free(wil);
 198
 199         return ERR_PTR(rc);
 200 }
 201
 202 void wil_if_free(struct wil6210_priv *wil)
 203 {
 204         struct net_device *ndev = wil_to_ndev(wil);
 205
 206         wil_dbg_misc(wil, "%s()\n", __func__);
 207
 208         if (!ndev)
 209                 return;
 210
 211         wil_priv_deinit(wil);
 212
 213         wil_to_ndev(wil) = NULL;
 214         free_netdev(ndev);
 215
 216         wil_wdev_free(wil);
 217 }
 218
 219 int wil_if_add(struct wil6210_priv *wil)
 220 {
 221         struct net_device *ndev = wil_to_ndev(wil);
 222         int rc;
 223
 224         wil_dbg_misc(wil, "%s()\n", __func__);
 225
 226         rc = register_netdev(ndev);
 227         if (rc < 0) {
 228                 dev_err(&ndev->dev, "Failed to register netdev: %d\n", rc);
 229                 return rc;
 230         }
 231
 232         return 0;
 233 }
 234
 235 void wil_if_remove(struct wil6210_priv *wil)
 236 {
 237         struct net_device *ndev = wil_to_ndev(wil);
 238
 239         wil_dbg_misc(wil, "%s()\n", __func__);
 240
 241         unregister_netdev(ndev);
 242 }