[mirror_ubuntu-hirsute-kernel.git] / drivers / net / wireless / ath / wil6210 / netdev.c

/*
 * Copyright (c) 2012-2014 Qualcomm Atheros, Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <linux/etherdevice.h>

#include "wil6210.h"

static int wil_open(struct net_device *ndev)
{
	struct wil6210_priv *wil = ndev_to_wil(ndev);

	return wil_up(wil);
}

static int wil_stop(struct net_device *ndev)
{
	struct wil6210_priv *wil = ndev_to_wil(ndev);

	return wil_down(wil);
}

static int wil_change_mtu(struct net_device *ndev, int new_mtu)
{
	struct wil6210_priv *wil = ndev_to_wil(ndev);

	if (new_mtu < 68 || new_mtu > IEEE80211_MAX_DATA_LEN_DMG)
		return -EINVAL;

	wil_dbg_misc(wil, "change MTU %d -> %d\n", ndev->mtu, new_mtu);
	ndev->mtu = new_mtu;

	return 0;
}

static const struct net_device_ops wil_netdev_ops = {
	.ndo_open		= wil_open,
	.ndo_stop		= wil_stop,
	.ndo_start_xmit		= wil_start_xmit,
	.ndo_set_mac_address	= eth_mac_addr,
	.ndo_validate_addr	= eth_validate_addr,
	.ndo_change_mtu		= wil_change_mtu,
};

static int wil6210_netdev_poll_rx(struct napi_struct *napi, int budget)
{
	struct wil6210_priv *wil = container_of(napi, struct wil6210_priv,
						napi_rx);
	int quota = budget;
	int done;

	wil_rx_handle(wil, &quota);
	done = budget - quota;

	if (done <= 1) { /* burst ends - only one packet processed */
		napi_complete(napi);
		wil6210_unmask_irq_rx(wil);
		wil_dbg_txrx(wil, "NAPI RX complete\n");
	}

	wil_dbg_txrx(wil, "NAPI RX poll(%d) done %d\n", budget, done);

	return done;
}

static int wil6210_netdev_poll_tx(struct napi_struct *napi, int budget)
{
	struct wil6210_priv *wil = container_of(napi, struct wil6210_priv,
						napi_tx);
	int tx_done = 0;
	uint i;

	/* always process ALL Tx complete, regardless budget - it is fast */
	for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
		struct vring *vring = &wil->vring_tx[i];

		if (!vring->va)
			continue;

		tx_done += wil_tx_complete(wil, i);
	}

	if (tx_done <= 1) { /* burst ends - only one packet processed */
		napi_complete(napi);
		wil6210_unmask_irq_tx(wil);
		wil_dbg_txrx(wil, "NAPI TX complete\n");
	}

	wil_dbg_txrx(wil, "NAPI TX poll(%d) done %d\n", budget, tx_done);

	return min(tx_done, budget);
}

void *wil_if_alloc(struct device *dev, void __iomem *csr)
{
	struct net_device *ndev;
	struct wireless_dev *wdev;
	struct wil6210_priv *wil;
	struct ieee80211_channel *ch;
	int rc = 0;

	wdev = wil_cfg80211_init(dev);
	if (IS_ERR(wdev)) {
		dev_err(dev, "wil_cfg80211_init failed\n");
		return wdev;
	}

	wil = wdev_to_wil(wdev);
	wil->csr = csr;
	wil->wdev = wdev;

	rc = wil_priv_init(wil);
	if (rc) {
		dev_err(dev, "wil_priv_init failed\n");
		goto out_wdev;
	}

	wdev->iftype = NL80211_IFTYPE_STATION; /* TODO */
	/* default monitor channel */
	ch = wdev->wiphy->bands[IEEE80211_BAND_60GHZ]->channels;
	cfg80211_chandef_create(&wdev->preset_chandef, ch, NL80211_CHAN_NO_HT);

	ndev = alloc_netdev(0, "wlan%d", NET_NAME_UNKNOWN, ether_setup);
	if (!ndev) {
		dev_err(dev, "alloc_netdev_mqs failed\n");
		rc = -ENOMEM;
		goto out_priv;
	}

	ndev->netdev_ops = &wil_netdev_ops;
	ndev->ieee80211_ptr = wdev;
	ndev->hw_features = NETIF_F_HW_CSUM | NETIF_F_RXCSUM |
			    NETIF_F_SG | NETIF_F_GRO;
	ndev->features |= ndev->hw_features;
	SET_NETDEV_DEV(ndev, wiphy_dev(wdev->wiphy));
	wdev->netdev = ndev;

	netif_napi_add(ndev, &wil->napi_rx, wil6210_netdev_poll_rx,
		       WIL6210_NAPI_BUDGET);
	netif_napi_add(ndev, &wil->napi_tx, wil6210_netdev_poll_tx,
		       WIL6210_NAPI_BUDGET);

	wil_link_off(wil);

	return wil;

 out_priv:
	wil_priv_deinit(wil);

 out_wdev:
	wil_wdev_free(wil);

	return ERR_PTR(rc);
}

void wil_if_free(struct wil6210_priv *wil)
{
	struct net_device *ndev = wil_to_ndev(wil);
	if (!ndev)
		return;

	free_netdev(ndev);
	wil_priv_deinit(wil);
	wil_wdev_free(wil);
}

int wil_if_add(struct wil6210_priv *wil)
{
	struct net_device *ndev = wil_to_ndev(wil);
	int rc;

	rc = register_netdev(ndev);
	if (rc < 0) {
		dev_err(&ndev->dev, "Failed to register netdev: %d\n", rc);
		return rc;
	}

	wil_link_off(wil);

	return 0;
}

void wil_if_remove(struct wil6210_priv *wil)
{
	struct net_device *ndev = wil_to_ndev(wil);

	unregister_netdev(ndev);
}
Commit	Line	Data
2be7d22f	1	/*
02525a79	2	* Copyright (c) 2012-2014 Qualcomm Atheros, Inc.
2be7d22f VK	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
2be7d22f	17	#include <linux/etherdevice.h>
2be7d22f VK	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
d87bac1b VK	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
2be7d22f VK	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,
afda8bb5 VK	52	.ndo_set_mac_address = eth_mac_addr,
afda8bb5 VK	53	.ndo_validate_addr = eth_validate_addr,
d87bac1b	54	.ndo_change_mtu = wil_change_mtu,
2be7d22f VK	55	};
2be7d22f VK	56
e0287c4a VK	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, &quota);
	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
2be7d22f VK	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
c835a677	135	ndev = alloc_netdev(0, "wlan%d", NET_NAME_UNKNOWN, ether_setup);
2be7d22f VK	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;
c236658f	144	ndev->hw_features = NETIF_F_HW_CSUM \| NETIF_F_RXCSUM \|
b5998e6a	145	NETIF_F_SG \| NETIF_F_GRO;
c236658f	146	ndev->features \|= ndev->hw_features;
2be7d22f VK	147	SET_NETDEV_DEV(ndev, wiphy_dev(wdev->wiphy));
	148	wdev->netdev = ndev;
	149
e0287c4a VK	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
2be7d22f VK	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	}