[linux-2.6-block.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"
#include "txrx.h"

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

	wil_dbg_misc(wil, "%s()\n", __func__);

	return wil_up(wil);
}

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

	wil_dbg_misc(wil, "%s()\n", __func__);

	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 > mtu_max) {
		wil_err(wil, "invalid MTU %d\n", new_mtu);
		return -EINVAL;
	}

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

	return 0;
}

static int wil_do_ioctl(struct net_device *ndev, struct ifreq *ifr, int cmd)
{
	struct wil6210_priv *wil = ndev_to_wil(ndev);

	int ret = wil_ioctl(wil, ifr->ifr_data, cmd);

	wil_dbg_misc(wil, "ioctl(0x%04x) -> %d\n", cmd, ret);

	return ret;
}

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,
	.ndo_do_ioctl		= wil_do_ioctl,
};

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;

	wil_dbg_misc(wil, "%s()\n", __func__);

	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;
	wil_set_ethtoolops(ndev);
	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);

	wil_dbg_misc(wil, "%s()\n", __func__);

	if (!ndev)
		return;

	wil_priv_deinit(wil);

	wil_to_ndev(wil) = NULL;
	free_netdev(ndev);

	wil_wdev_free(wil);
}

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

	wil_dbg_misc(wil, "%s()\n", __func__);

	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);

	wil_dbg_misc(wil, "%s()\n", __func__);

	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
2be7d22f VK	19	#include "wil6210.h"
e0106ada	20	#include "txrx.h"
2be7d22f VK	21
	22	static int wil_open(struct net_device *ndev)
	23	{
	24	struct wil6210_priv *wil = ndev_to_wil(ndev);
	25
9cf10d62 VK	26	wil_dbg_misc(wil, "%s()\n", __func__);
9cf10d62 VK	27
2be7d22f VK	28	return wil_up(wil);
	29	}
	30
	31	static int wil_stop(struct net_device *ndev)
	32	{
	33	struct wil6210_priv *wil = ndev_to_wil(ndev);
	34
9cf10d62 VK	35	wil_dbg_misc(wil, "%s()\n", __func__);
9cf10d62 VK	36
2be7d22f VK	37	return wil_down(wil);
	38	}
	39
d87bac1b VK	40	static int wil_change_mtu(struct net_device *ndev, int new_mtu)
	41	{
	42	struct wil6210_priv *wil = ndev_to_wil(ndev);
	43
9a06bec9	44	if (new_mtu < 68 \|\| new_mtu > mtu_max) {
e0106ada	45	wil_err(wil, "invalid MTU %d\n", new_mtu);
d87bac1b	46	return -EINVAL;
e0106ada	47	}
d87bac1b VK	48
	49	wil_dbg_misc(wil, "change MTU %d -> %d\n", ndev->mtu, new_mtu);
	50	ndev->mtu = new_mtu;
	51
	52	return 0;
	53	}
	54
dba4b74d VK	55	static int wil_do_ioctl(struct net_device ndev, struct ifreq ifr, int cmd)
	56	{
	57	struct wil6210_priv *wil = ndev_to_wil(ndev);
	58
	59	int ret = wil_ioctl(wil, ifr->ifr_data, cmd);
	60
	61	wil_dbg_misc(wil, "ioctl(0x%04x) -> %d\n", cmd, ret);
	62
	63	return ret;
	64	}
	65
2be7d22f VK	66	static const struct net_device_ops wil_netdev_ops = {
	67	.ndo_open = wil_open,
	68	.ndo_stop = wil_stop,
	69	.ndo_start_xmit = wil_start_xmit,
afda8bb5 VK	70	.ndo_set_mac_address = eth_mac_addr,
afda8bb5 VK	71	.ndo_validate_addr = eth_validate_addr,
d87bac1b	72	.ndo_change_mtu = wil_change_mtu,
dba4b74d	73	.ndo_do_ioctl = wil_do_ioctl,
2be7d22f VK	74	};
2be7d22f VK	75
e0287c4a VK	76	static int wil6210_netdev_poll_rx(struct napi_struct *napi, int budget)
	77	{
	78	struct wil6210_priv *wil = container_of(napi, struct wil6210_priv,
	79	napi_rx);
	80	int quota = budget;
	81	int done;
	82
	83	wil_rx_handle(wil, &quota);
	84	done = budget - quota;
	85
	86	if (done <= 1) { /* burst ends - only one packet processed */
	87	napi_complete(napi);
	88	wil6210_unmask_irq_rx(wil);
	89	wil_dbg_txrx(wil, "NAPI RX complete\n");
	90	}
	91
	92	wil_dbg_txrx(wil, "NAPI RX poll(%d) done %d\n", budget, done);
	93
	94	return done;
	95	}
	96
	97	static int wil6210_netdev_poll_tx(struct napi_struct *napi, int budget)
	98	{
	99	struct wil6210_priv *wil = container_of(napi, struct wil6210_priv,
	100	napi_tx);
	101	int tx_done = 0;
	102	uint i;
	103
	104	/* always process ALL Tx complete, regardless budget - it is fast */
	105	for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
	106	struct vring *vring = &wil->vring_tx[i];
	107
	108	if (!vring->va)
	109	continue;
	110
	111	tx_done += wil_tx_complete(wil, i);
	112	}
	113
	114	if (tx_done <= 1) { /* burst ends - only one packet processed */
	115	napi_complete(napi);
	116	wil6210_unmask_irq_tx(wil);
	117	wil_dbg_txrx(wil, "NAPI TX complete\n");
	118	}
	119
	120	wil_dbg_txrx(wil, "NAPI TX poll(%d) done %d\n", budget, tx_done);
	121
	122	return min(tx_done, budget);
	123	}
	124
2be7d22f VK	125	void wil_if_alloc(struct device dev, void __iomem *csr)
	126	{
	127	struct net_device *ndev;
	128	struct wireless_dev *wdev;
	129	struct wil6210_priv *wil;
	130	struct ieee80211_channel *ch;
	131	int rc = 0;
	132
	133	wdev = wil_cfg80211_init(dev);
	134	if (IS_ERR(wdev)) {
	135	dev_err(dev, "wil_cfg80211_init failed\n");
	136	return wdev;
	137	}
	138
	139	wil = wdev_to_wil(wdev);
	140	wil->csr = csr;
	141	wil->wdev = wdev;
	142
9cf10d62 VK	143	wil_dbg_misc(wil, "%s()\n", __func__);
9cf10d62 VK	144
2be7d22f VK	145	rc = wil_priv_init(wil);
	146	if (rc) {
	147	dev_err(dev, "wil_priv_init failed\n");
	148	goto out_wdev;
	149	}
	150
	151	wdev->iftype = NL80211_IFTYPE_STATION; /* TODO */
	152	/* default monitor channel */
	153	ch = wdev->wiphy->bands[IEEE80211_BAND_60GHZ]->channels;
	154	cfg80211_chandef_create(&wdev->preset_chandef, ch, NL80211_CHAN_NO_HT);
	155
c835a677	156	ndev = alloc_netdev(0, "wlan%d", NET_NAME_UNKNOWN, ether_setup);
2be7d22f VK	157	if (!ndev) {
	158	dev_err(dev, "alloc_netdev_mqs failed\n");
	159	rc = -ENOMEM;
	160	goto out_priv;
	161	}
	162
	163	ndev->netdev_ops = &wil_netdev_ops;
b6b1b0ec	164	wil_set_ethtoolops(ndev);
2be7d22f	165	ndev->ieee80211_ptr = wdev;
c236658f	166	ndev->hw_features = NETIF_F_HW_CSUM \| NETIF_F_RXCSUM \|
b5998e6a	167	NETIF_F_SG \| NETIF_F_GRO;
c236658f	168	ndev->features \|= ndev->hw_features;
2be7d22f VK	169	SET_NETDEV_DEV(ndev, wiphy_dev(wdev->wiphy));
	170	wdev->netdev = ndev;
	171
e0287c4a VK	172	netif_napi_add(ndev, &wil->napi_rx, wil6210_netdev_poll_rx,
	173	WIL6210_NAPI_BUDGET);
	174	netif_napi_add(ndev, &wil->napi_tx, wil6210_netdev_poll_tx,
	175	WIL6210_NAPI_BUDGET);
	176
2be7d22f VK	177	wil_link_off(wil);
	178
	179	return wil;
	180
	181	out_priv:
	182	wil_priv_deinit(wil);
	183
	184	out_wdev:
	185	wil_wdev_free(wil);
	186
	187	return ERR_PTR(rc);
	188	}
	189
	190	void wil_if_free(struct wil6210_priv *wil)
	191	{
	192	struct net_device *ndev = wil_to_ndev(wil);
8fcfdeac	193
9cf10d62 VK	194	wil_dbg_misc(wil, "%s()\n", __func__);
9cf10d62 VK	195
2be7d22f VK	196	if (!ndev)
	197	return;
	198
2be7d22f	199	wil_priv_deinit(wil);
8fcfdeac VK	200
	201	wil_to_ndev(wil) = NULL;
	202	free_netdev(ndev);
	203
2be7d22f VK	204	wil_wdev_free(wil);
	205	}
	206
	207	int wil_if_add(struct wil6210_priv *wil)
	208	{
	209	struct net_device *ndev = wil_to_ndev(wil);
	210	int rc;
	211
9cf10d62 VK	212	wil_dbg_misc(wil, "%s()\n", __func__);
9cf10d62 VK	213
2be7d22f VK	214	rc = register_netdev(ndev);
	215	if (rc < 0) {
	216	dev_err(&ndev->dev, "Failed to register netdev: %d\n", rc);
	217	return rc;
	218	}
	219
	220	wil_link_off(wil);
	221
	222	return 0;
	223	}
	224
	225	void wil_if_remove(struct wil6210_priv *wil)
	226	{
	227	struct net_device *ndev = wil_to_ndev(wil);
	228
9cf10d62 VK	229	wil_dbg_misc(wil, "%s()\n", __func__);
9cf10d62 VK	230
2be7d22f VK	231	unregister_netdev(ndev);
2be7d22f VK	232	}