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, "a); 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 } 235