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/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, "open\n");
  26
  27         if (debug_fw ||
  28             test_bit(WMI_FW_CAPABILITY_WMI_ONLY, wil->fw_capabilities)) {
  29                 wil_err(wil, "while in debug_fw or wmi_only mode\n");
  30                 return -EINVAL;
  31         }
  32
  33         return wil_up(wil);
  34 }
  35
  36 static int wil_stop(struct net_device *ndev)
  37 {
  38         struct wil6210_priv *wil = ndev_to_wil(ndev);
  39
  40         wil_dbg_misc(wil, "stop\n");
  41
  42         return wil_down(wil);
  43 }
  44
  45 static const struct net_device_ops wil_netdev_ops = {
  46         .ndo_open               = wil_open,
  47         .ndo_stop               = wil_stop,
  48         .ndo_start_xmit         = wil_start_xmit,
  49         .ndo_set_mac_address    = eth_mac_addr,
  50         .ndo_validate_addr      = eth_validate_addr,
  51 };
  52
  53 static int wil6210_netdev_poll_rx(struct napi_struct *napi, int budget)
  54 {
  55         struct wil6210_priv *wil = container_of(napi, struct wil6210_priv,
  56                                                 napi_rx);
  57         int quota = budget;
  58         int done;
  59
  60         wil_rx_handle(wil, &quota);
  61         done = budget - quota;
  62
  63         if (done < budget) {
  64                 napi_complete_done(napi, done);
  65                 wil6210_unmask_irq_rx(wil);
  66                 wil_dbg_txrx(wil, "NAPI RX complete\n");
  67         }
  68
  69         wil_dbg_txrx(wil, "NAPI RX poll(%d) done %d\n", budget, done);
  70
  71         return done;
  72 }
  73
  74 static int wil6210_netdev_poll_tx(struct napi_struct *napi, int budget)
  75 {
  76         struct wil6210_priv *wil = container_of(napi, struct wil6210_priv,
  77                                                 napi_tx);
  78         int tx_done = 0;
  79         uint i;
  80
  81         /* always process ALL Tx complete, regardless budget - it is fast */
  82         for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
  83                 struct vring *vring = &wil->vring_tx[i];
  84                 struct vring_tx_data *txdata = &wil->vring_tx_data[i];
  85
  86                 if (!vring->va || !txdata->enabled)
  87                         continue;
  88
  89                 tx_done += wil_tx_complete(wil, i);
  90         }
  91
  92         if (tx_done < budget) {
  93                 napi_complete(napi);
  94                 wil6210_unmask_irq_tx(wil);
  95                 wil_dbg_txrx(wil, "NAPI TX complete\n");
  96         }
  97
  98         wil_dbg_txrx(wil, "NAPI TX poll(%d) done %d\n", budget, tx_done);
  99
 100         return min(tx_done, budget);
 101 }
 102
 103 static void wil_dev_setup(struct net_device *dev)
 104 {
 105         ether_setup(dev);
 106         dev->max_mtu = mtu_max;
 107         dev->tx_queue_len = WIL_TX_Q_LEN_DEFAULT;
 108 }
 109
 110 void *wil_if_alloc(struct device *dev)
 111 {
 112         struct net_device *ndev;
 113         struct wireless_dev *wdev;
 114         struct wil6210_priv *wil;
 115         struct ieee80211_channel *ch;
 116         int rc = 0;
 117
 118         wdev = wil_cfg80211_init(dev);
 119         if (IS_ERR(wdev)) {
 120                 dev_err(dev, "wil_cfg80211_init failed\n");
 121                 return wdev;
 122         }
 123
 124         wil = wdev_to_wil(wdev);
 125         wil->wdev = wdev;
 126         wil->radio_wdev = wdev;
 127
 128         wil_dbg_misc(wil, "if_alloc\n");
 129
 130         rc = wil_priv_init(wil);
 131         if (rc) {
 132                 dev_err(dev, "wil_priv_init failed\n");
 133                 goto out_wdev;
 134         }
 135
 136         wdev->iftype = NL80211_IFTYPE_STATION; /* TODO */
 137         /* default monitor channel */
 138         ch = wdev->wiphy->bands[NL80211_BAND_60GHZ]->channels;
 139         cfg80211_chandef_create(&wdev->preset_chandef, ch, NL80211_CHAN_NO_HT);
 140
 141         ndev = alloc_netdev(0, "wlan%d", NET_NAME_UNKNOWN, wil_dev_setup);
 142         if (!ndev) {
 143                 dev_err(dev, "alloc_netdev_mqs failed\n");
 144                 rc = -ENOMEM;
 145                 goto out_priv;
 146         }
 147
 148         ndev->netdev_ops = &wil_netdev_ops;
 149         wil_set_ethtoolops(ndev);
 150         ndev->ieee80211_ptr = wdev;
 151         ndev->hw_features = NETIF_F_HW_CSUM | NETIF_F_RXCSUM |
 152                             NETIF_F_SG | NETIF_F_GRO |
 153                             NETIF_F_TSO | NETIF_F_TSO6 |
 154                             NETIF_F_RXHASH;
 155
 156         ndev->features |= ndev->hw_features;
 157         SET_NETDEV_DEV(ndev, wiphy_dev(wdev->wiphy));
 158         wdev->netdev = ndev;
 159
 160         return wil;
 161
 162  out_priv:
 163         wil_priv_deinit(wil);
 164
 165  out_wdev:
 166         wil_wdev_free(wil);
 167
 168         return ERR_PTR(rc);
 169 }
 170
 171 void wil_if_free(struct wil6210_priv *wil)
 172 {
 173         struct net_device *ndev = wil_to_ndev(wil);
 174
 175         wil_dbg_misc(wil, "if_free\n");
 176
 177         if (!ndev)
 178                 return;
 179
 180         wil_priv_deinit(wil);
 181
 182         wil_to_ndev(wil) = NULL;
 183         free_netdev(ndev);
 184
 185         wil_wdev_free(wil);
 186 }
 187
 188 int wil_if_add(struct wil6210_priv *wil)
 189 {
 190         struct wireless_dev *wdev = wil_to_wdev(wil);
 191         struct wiphy *wiphy = wdev->wiphy;
 192         struct net_device *ndev = wil_to_ndev(wil);
 193         int rc;
 194
 195         wil_dbg_misc(wil, "entered");
 196
 197         strlcpy(wiphy->fw_version, wil->fw_version, sizeof(wiphy->fw_version));
 198
 199         rc = wiphy_register(wiphy);
 200         if (rc < 0) {
 201                 wil_err(wil, "failed to register wiphy, err %d\n", rc);
 202                 return rc;
 203         }
 204
 205         netif_napi_add(ndev, &wil->napi_rx, wil6210_netdev_poll_rx,
 206                        WIL6210_NAPI_BUDGET);
 207         netif_tx_napi_add(ndev, &wil->napi_tx, wil6210_netdev_poll_tx,
 208                           WIL6210_NAPI_BUDGET);
 209
 210         wil_update_net_queues_bh(wil, NULL, true);
 211
 212         rc = register_netdev(ndev);
 213         if (rc < 0) {
 214                 dev_err(&ndev->dev, "Failed to register netdev: %d\n", rc);
 215                 goto out_wiphy;
 216         }
 217
 218         return 0;
 219
 220 out_wiphy:
 221         wiphy_unregister(wdev->wiphy);
 222         return rc;
 223 }
 224
 225 void wil_if_remove(struct wil6210_priv *wil)
 226 {
 227         struct net_device *ndev = wil_to_ndev(wil);
 228         struct wireless_dev *wdev = wil_to_wdev(wil);
 229
 230         wil_dbg_misc(wil, "if_remove\n");
 231
 232         unregister_netdev(ndev);
 233         wiphy_unregister(wdev->wiphy);
 234 }