1 /* 2 * Copyright (c) 2012 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 19 #include "wil6210.h" 20 21 static int wil_open(struct net_device *ndev) 22 { 23 struct wil6210_priv *wil = ndev_to_wil(ndev); 24 25 return wil_up(wil); 26 } 27 28 static int wil_stop(struct net_device *ndev) 29 { 30 struct wil6210_priv *wil = ndev_to_wil(ndev); 31 32 return wil_down(wil); 33 } 34 35 static int wil_change_mtu(struct net_device *ndev, int new_mtu) 36 { 37 struct wil6210_priv *wil = ndev_to_wil(ndev); 38 39 if (new_mtu < 68 || new_mtu > IEEE80211_MAX_DATA_LEN_DMG) 40 return -EINVAL; 41 42 wil_dbg_misc(wil, "change MTU %d -> %d\n", ndev->mtu, new_mtu); 43 ndev->mtu = new_mtu; 44 45 return 0; 46 } 47 48 static const struct net_device_ops wil_netdev_ops = { 49 .ndo_open = wil_open, 50 .ndo_stop = wil_stop, 51 .ndo_start_xmit = wil_start_xmit, 52 .ndo_set_mac_address = eth_mac_addr, 53 .ndo_validate_addr = eth_validate_addr, 54 .ndo_change_mtu = wil_change_mtu, 55 }; 56 57 static int wil6210_netdev_poll_rx(struct napi_struct *napi, int budget) 58 { 59 struct wil6210_priv *wil = container_of(napi, struct wil6210_priv, 60 napi_rx); 61 int quota = budget; 62 int done; 63 64 wil_rx_handle(wil, "a); 65 done = budget - quota; 66 67 if (done <= 1) { /* burst ends - only one packet processed */ 68 napi_complete(napi); 69 wil6210_unmask_irq_rx(wil); 70 wil_dbg_txrx(wil, "NAPI RX complete\n"); 71 } 72 73 wil_dbg_txrx(wil, "NAPI RX poll(%d) done %d\n", budget, done); 74 75 return done; 76 } 77 78 static int wil6210_netdev_poll_tx(struct napi_struct *napi, int budget) 79 { 80 struct wil6210_priv *wil = container_of(napi, struct wil6210_priv, 81 napi_tx); 82 int tx_done = 0; 83 uint i; 84 85 /* always process ALL Tx complete, regardless budget - it is fast */ 86 for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 87 struct vring *vring = &wil->vring_tx[i]; 88 89 if (!vring->va) 90 continue; 91 92 tx_done += wil_tx_complete(wil, i); 93 } 94 95 if (tx_done <= 1) { /* burst ends - only one packet processed */ 96 napi_complete(napi); 97 wil6210_unmask_irq_tx(wil); 98 wil_dbg_txrx(wil, "NAPI TX complete\n"); 99 } 100 101 wil_dbg_txrx(wil, "NAPI TX poll(%d) done %d\n", budget, tx_done); 102 103 return min(tx_done, budget); 104 } 105 106 void *wil_if_alloc(struct device *dev, void __iomem *csr) 107 { 108 struct net_device *ndev; 109 struct wireless_dev *wdev; 110 struct wil6210_priv *wil; 111 struct ieee80211_channel *ch; 112 int rc = 0; 113 114 wdev = wil_cfg80211_init(dev); 115 if (IS_ERR(wdev)) { 116 dev_err(dev, "wil_cfg80211_init failed\n"); 117 return wdev; 118 } 119 120 wil = wdev_to_wil(wdev); 121 wil->csr = csr; 122 wil->wdev = wdev; 123 124 rc = wil_priv_init(wil); 125 if (rc) { 126 dev_err(dev, "wil_priv_init failed\n"); 127 goto out_wdev; 128 } 129 130 wdev->iftype = NL80211_IFTYPE_STATION; /* TODO */ 131 /* default monitor channel */ 132 ch = wdev->wiphy->bands[IEEE80211_BAND_60GHZ]->channels; 133 cfg80211_chandef_create(&wdev->preset_chandef, ch, NL80211_CHAN_NO_HT); 134 135 ndev = alloc_netdev(0, "wlan%d", NET_NAME_UNKNOWN, ether_setup); 136 if (!ndev) { 137 dev_err(dev, "alloc_netdev_mqs failed\n"); 138 rc = -ENOMEM; 139 goto out_priv; 140 } 141 142 ndev->netdev_ops = &wil_netdev_ops; 143 ndev->ieee80211_ptr = wdev; 144 ndev->hw_features = NETIF_F_HW_CSUM | NETIF_F_RXCSUM | 145 NETIF_F_SG | NETIF_F_GRO; 146 ndev->features |= ndev->hw_features; 147 SET_NETDEV_DEV(ndev, wiphy_dev(wdev->wiphy)); 148 wdev->netdev = ndev; 149 150 netif_napi_add(ndev, &wil->napi_rx, wil6210_netdev_poll_rx, 151 WIL6210_NAPI_BUDGET); 152 netif_napi_add(ndev, &wil->napi_tx, wil6210_netdev_poll_tx, 153 WIL6210_NAPI_BUDGET); 154 155 wil_link_off(wil); 156 157 return wil; 158 159 out_priv: 160 wil_priv_deinit(wil); 161 162 out_wdev: 163 wil_wdev_free(wil); 164 165 return ERR_PTR(rc); 166 } 167 168 void wil_if_free(struct wil6210_priv *wil) 169 { 170 struct net_device *ndev = wil_to_ndev(wil); 171 if (!ndev) 172 return; 173 174 free_netdev(ndev); 175 wil_priv_deinit(wil); 176 wil_wdev_free(wil); 177 } 178 179 int wil_if_add(struct wil6210_priv *wil) 180 { 181 struct net_device *ndev = wil_to_ndev(wil); 182 int rc; 183 184 rc = register_netdev(ndev); 185 if (rc < 0) { 186 dev_err(&ndev->dev, "Failed to register netdev: %d\n", rc); 187 return rc; 188 } 189 190 wil_link_off(wil); 191 192 return 0; 193 } 194 195 void wil_if_remove(struct wil6210_priv *wil) 196 { 197 struct net_device *ndev = wil_to_ndev(wil); 198 199 unregister_netdev(ndev); 200 } 201