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