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