[mirror_ubuntu-artful-kernel.git] / net / mac80211 / driver-ops.c

/*
 * Copyright 2015 Intel Deutschland GmbH
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include <net/mac80211.h>
#include "ieee80211_i.h"
#include "trace.h"
#include "driver-ops.h"

int drv_start(struct ieee80211_local *local)
{
	int ret;

	might_sleep();

	if (WARN_ON(local->started))
		return -EALREADY;

	trace_drv_start(local);
	local->started = true;
	/* allow rx frames */
	smp_mb();
	ret = local->ops->start(&local->hw);
	trace_drv_return_int(local, ret);

	if (ret)
		local->started = false;

	return ret;
}

void drv_stop(struct ieee80211_local *local)
{
	might_sleep();

	if (WARN_ON(!local->started))
		return;

	trace_drv_stop(local);
	local->ops->stop(&local->hw);
	trace_drv_return_void(local);

	/* sync away all work on the tasklet before clearing started */
	tasklet_disable(&local->tasklet);
	tasklet_enable(&local->tasklet);

	barrier();

	local->started = false;
}

int drv_add_interface(struct ieee80211_local *local,
		      struct ieee80211_sub_if_data *sdata)
{
	int ret;

	might_sleep();

	if (WARN_ON(sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
		    (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
		     !ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF) &&
		     !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))))
		return -EINVAL;

	trace_drv_add_interface(local, sdata);
	ret = local->ops->add_interface(&local->hw, &sdata->vif);
	trace_drv_return_int(local, ret);

	if (ret == 0)
		sdata->flags |= IEEE80211_SDATA_IN_DRIVER;

	return ret;
}

int drv_change_interface(struct ieee80211_local *local,
			 struct ieee80211_sub_if_data *sdata,
			 enum nl80211_iftype type, bool p2p)
{
	int ret;

	might_sleep();

	if (!check_sdata_in_driver(sdata))
		return -EIO;

	trace_drv_change_interface(local, sdata, type, p2p);
	ret = local->ops->change_interface(&local->hw, &sdata->vif, type, p2p);
	trace_drv_return_int(local, ret);
	return ret;
}

void drv_remove_interface(struct ieee80211_local *local,
			  struct ieee80211_sub_if_data *sdata)
{
	might_sleep();

	if (!check_sdata_in_driver(sdata))
		return;

	trace_drv_remove_interface(local, sdata);
	local->ops->remove_interface(&local->hw, &sdata->vif);
	sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
	trace_drv_return_void(local);
}

__must_check
int drv_sta_state(struct ieee80211_local *local,
		  struct ieee80211_sub_if_data *sdata,
		  struct sta_info *sta,
		  enum ieee80211_sta_state old_state,
		  enum ieee80211_sta_state new_state)
{
	int ret = 0;

	might_sleep();

	sdata = get_bss_sdata(sdata);
	if (!check_sdata_in_driver(sdata))
		return -EIO;

	trace_drv_sta_state(local, sdata, &sta->sta, old_state, new_state);
	if (local->ops->sta_state) {
		ret = local->ops->sta_state(&local->hw, &sdata->vif, &sta->sta,
					    old_state, new_state);
	} else if (old_state == IEEE80211_STA_AUTH &&
		   new_state == IEEE80211_STA_ASSOC) {
		ret = drv_sta_add(local, sdata, &sta->sta);
		if (ret == 0)
			sta->uploaded = true;
	} else if (old_state == IEEE80211_STA_ASSOC &&
		   new_state == IEEE80211_STA_AUTH) {
		drv_sta_remove(local, sdata, &sta->sta);
	}
	trace_drv_return_int(local, ret);
	return ret;
}

void drv_sta_rc_update(struct ieee80211_local *local,
		       struct ieee80211_sub_if_data *sdata,
		       struct ieee80211_sta *sta, u32 changed)
{
	sdata = get_bss_sdata(sdata);
	if (!check_sdata_in_driver(sdata))
		return;

	WARN_ON(changed & IEEE80211_RC_SUPP_RATES_CHANGED &&
		(sdata->vif.type != NL80211_IFTYPE_ADHOC &&
		 sdata->vif.type != NL80211_IFTYPE_MESH_POINT));

	trace_drv_sta_rc_update(local, sdata, sta, changed);
	if (local->ops->sta_rc_update)
		local->ops->sta_rc_update(&local->hw, &sdata->vif,
					  sta, changed);

	trace_drv_return_void(local);
}

int drv_conf_tx(struct ieee80211_local *local,
		struct ieee80211_sub_if_data *sdata, u16 ac,
		const struct ieee80211_tx_queue_params *params)
{
	int ret = -EOPNOTSUPP;

	might_sleep();

	if (!check_sdata_in_driver(sdata))
		return -EIO;

	if (WARN_ONCE(params->cw_min == 0 ||
		      params->cw_min > params->cw_max,
		      "%s: invalid CW_min/CW_max: %d/%d\n",
		      sdata->name, params->cw_min, params->cw_max))
		return -EINVAL;

	trace_drv_conf_tx(local, sdata, ac, params);
	if (local->ops->conf_tx)
		ret = local->ops->conf_tx(&local->hw, &sdata->vif,
					  ac, params);
	trace_drv_return_int(local, ret);
	return ret;
}

u64 drv_get_tsf(struct ieee80211_local *local,
		struct ieee80211_sub_if_data *sdata)
{
	u64 ret = -1ULL;

	might_sleep();

	if (!check_sdata_in_driver(sdata))
		return ret;

	trace_drv_get_tsf(local, sdata);
	if (local->ops->get_tsf)
		ret = local->ops->get_tsf(&local->hw, &sdata->vif);
	trace_drv_return_u64(local, ret);
	return ret;
}

void drv_set_tsf(struct ieee80211_local *local,
		 struct ieee80211_sub_if_data *sdata,
		 u64 tsf)
{
	might_sleep();

	if (!check_sdata_in_driver(sdata))
		return;

	trace_drv_set_tsf(local, sdata, tsf);
	if (local->ops->set_tsf)
		local->ops->set_tsf(&local->hw, &sdata->vif, tsf);
	trace_drv_return_void(local);
}

void drv_offset_tsf(struct ieee80211_local *local,
		    struct ieee80211_sub_if_data *sdata,
		    s64 offset)
{
	might_sleep();

	if (!check_sdata_in_driver(sdata))
		return;

	trace_drv_offset_tsf(local, sdata, offset);
	if (local->ops->offset_tsf)
		local->ops->offset_tsf(&local->hw, &sdata->vif, offset);
	trace_drv_return_void(local);
}

void drv_reset_tsf(struct ieee80211_local *local,
		   struct ieee80211_sub_if_data *sdata)
{
	might_sleep();

	if (!check_sdata_in_driver(sdata))
		return;

	trace_drv_reset_tsf(local, sdata);
	if (local->ops->reset_tsf)
		local->ops->reset_tsf(&local->hw, &sdata->vif);
	trace_drv_return_void(local);
}

int drv_switch_vif_chanctx(struct ieee80211_local *local,
			   struct ieee80211_vif_chanctx_switch *vifs,
			   int n_vifs, enum ieee80211_chanctx_switch_mode mode)
{
	int ret = 0;
	int i;

	might_sleep();

	if (!local->ops->switch_vif_chanctx)
		return -EOPNOTSUPP;

	for (i = 0; i < n_vifs; i++) {
		struct ieee80211_chanctx *new_ctx =
			container_of(vifs[i].new_ctx,
				     struct ieee80211_chanctx,
				     conf);
		struct ieee80211_chanctx *old_ctx =
			container_of(vifs[i].old_ctx,
				     struct ieee80211_chanctx,
				     conf);

		WARN_ON_ONCE(!old_ctx->driver_present);
		WARN_ON_ONCE((mode == CHANCTX_SWMODE_SWAP_CONTEXTS &&
			      new_ctx->driver_present) ||
			     (mode == CHANCTX_SWMODE_REASSIGN_VIF &&
			      !new_ctx->driver_present));
	}

	trace_drv_switch_vif_chanctx(local, vifs, n_vifs, mode);
	ret = local->ops->switch_vif_chanctx(&local->hw,
					     vifs, n_vifs, mode);
	trace_drv_return_int(local, ret);

	if (!ret && mode == CHANCTX_SWMODE_SWAP_CONTEXTS) {
		for (i = 0; i < n_vifs; i++) {
			struct ieee80211_chanctx *new_ctx =
				container_of(vifs[i].new_ctx,
					     struct ieee80211_chanctx,
					     conf);
			struct ieee80211_chanctx *old_ctx =
				container_of(vifs[i].old_ctx,
					     struct ieee80211_chanctx,
					     conf);

			new_ctx->driver_present = true;
			old_ctx->driver_present = false;
		}
	}

	return ret;
}

int drv_ampdu_action(struct ieee80211_local *local,
		     struct ieee80211_sub_if_data *sdata,
		     struct ieee80211_ampdu_params *params)
{
	int ret = -EOPNOTSUPP;

	might_sleep();

	sdata = get_bss_sdata(sdata);
	if (!check_sdata_in_driver(sdata))
		return -EIO;

	trace_drv_ampdu_action(local, sdata, params);

	if (local->ops->ampdu_action)
		ret = local->ops->ampdu_action(&local->hw, &sdata->vif, params);

	trace_drv_return_int(local, ret);

	return ret;
}
Commit	Line	Data
727da60b	1	/*
968a76ce EP	2	* Copyright 2015 Intel Deutschland GmbH
968a76ce EP	3	*
727da60b DV	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License version 2 as
	6	* published by the Free Software Foundation.
	7	*/
	8	#include <net/mac80211.h>
	9	#include "ieee80211_i.h"
	10	#include "trace.h"
	11	#include "driver-ops.h"
	12
968a76ce EP	13	int drv_start(struct ieee80211_local *local)
	14	{
	15	int ret;
	16
	17	might_sleep();
	18
	19	if (WARN_ON(local->started))
	20	return -EALREADY;
	21
	22	trace_drv_start(local);
	23	local->started = true;
	24	/* allow rx frames */
	25	smp_mb();
	26	ret = local->ops->start(&local->hw);
	27	trace_drv_return_int(local, ret);
	28
	29	if (ret)
	30	local->started = false;
	31
	32	return ret;
	33	}
	34
	35	void drv_stop(struct ieee80211_local *local)
	36	{
	37	might_sleep();
	38
	39	if (WARN_ON(!local->started))
	40	return;
	41
	42	trace_drv_stop(local);
	43	local->ops->stop(&local->hw);
	44	trace_drv_return_void(local);
	45
	46	/* sync away all work on the tasklet before clearing started */
	47	tasklet_disable(&local->tasklet);
	48	tasklet_enable(&local->tasklet);
	49
	50	barrier();
	51
	52	local->started = false;
	53	}
	54
9aae296a DV	55	int drv_add_interface(struct ieee80211_local *local,
	56	struct ieee80211_sub_if_data *sdata)
	57	{
	58	int ret;
	59
	60	might_sleep();
	61
	62	if (WARN_ON(sdata->vif.type == NL80211_IFTYPE_AP_VLAN \|\|
	63	(sdata->vif.type == NL80211_IFTYPE_MONITOR &&
	64	!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF) &&
d8212184	65	!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))))
9aae296a DV	66	return -EINVAL;
	67
	68	trace_drv_add_interface(local, sdata);
	69	ret = local->ops->add_interface(&local->hw, &sdata->vif);
	70	trace_drv_return_int(local, ret);
	71
	72	if (ret == 0)
	73	sdata->flags \|= IEEE80211_SDATA_IN_DRIVER;
	74
	75	return ret;
	76	}
	77
	78	int drv_change_interface(struct ieee80211_local *local,
	79	struct ieee80211_sub_if_data *sdata,
	80	enum nl80211_iftype type, bool p2p)
	81	{
	82	int ret;
	83
	84	might_sleep();
	85
	86	if (!check_sdata_in_driver(sdata))
	87	return -EIO;
	88
	89	trace_drv_change_interface(local, sdata, type, p2p);
	90	ret = local->ops->change_interface(&local->hw, &sdata->vif, type, p2p);
	91	trace_drv_return_int(local, ret);
	92	return ret;
	93	}
	94
	95	void drv_remove_interface(struct ieee80211_local *local,
	96	struct ieee80211_sub_if_data *sdata)
	97	{
	98	might_sleep();
	99
	100	if (!check_sdata_in_driver(sdata))
	101	return;
	102
	103	trace_drv_remove_interface(local, sdata);
	104	local->ops->remove_interface(&local->hw, &sdata->vif);
	105	sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
	106	trace_drv_return_void(local);
	107	}
	108
727da60b DV	109	__must_check
	110	int drv_sta_state(struct ieee80211_local *local,
	111	struct ieee80211_sub_if_data *sdata,
	112	struct sta_info *sta,
	113	enum ieee80211_sta_state old_state,
	114	enum ieee80211_sta_state new_state)
	115	{
	116	int ret = 0;
	117
	118	might_sleep();
	119
	120	sdata = get_bss_sdata(sdata);
	121	if (!check_sdata_in_driver(sdata))
	122	return -EIO;
	123
	124	trace_drv_sta_state(local, sdata, &sta->sta, old_state, new_state);
	125	if (local->ops->sta_state) {
	126	ret = local->ops->sta_state(&local->hw, &sdata->vif, &sta->sta,
	127	old_state, new_state);
	128	} else if (old_state == IEEE80211_STA_AUTH &&
	129	new_state == IEEE80211_STA_ASSOC) {
	130	ret = drv_sta_add(local, sdata, &sta->sta);
	131	if (ret == 0)
	132	sta->uploaded = true;
	133	} else if (old_state == IEEE80211_STA_ASSOC &&
	134	new_state == IEEE80211_STA_AUTH) {
	135	drv_sta_remove(local, sdata, &sta->sta);
	136	}
	137	trace_drv_return_int(local, ret);
	138	return ret;
	139	}
b23dcd4a	140
4fbd572c DV	141	void drv_sta_rc_update(struct ieee80211_local *local,
	142	struct ieee80211_sub_if_data *sdata,
	143	struct ieee80211_sta *sta, u32 changed)
	144	{
	145	sdata = get_bss_sdata(sdata);
	146	if (!check_sdata_in_driver(sdata))
	147	return;
	148
	149	WARN_ON(changed & IEEE80211_RC_SUPP_RATES_CHANGED &&
	150	(sdata->vif.type != NL80211_IFTYPE_ADHOC &&
	151	sdata->vif.type != NL80211_IFTYPE_MESH_POINT));
	152
	153	trace_drv_sta_rc_update(local, sdata, sta, changed);
	154	if (local->ops->sta_rc_update)
	155	local->ops->sta_rc_update(&local->hw, &sdata->vif,
	156	sta, changed);
	157
	158	trace_drv_return_void(local);
	159	}
	160
b23dcd4a DV	161	int drv_conf_tx(struct ieee80211_local *local,
	162	struct ieee80211_sub_if_data *sdata, u16 ac,
	163	const struct ieee80211_tx_queue_params *params)
	164	{
	165	int ret = -EOPNOTSUPP;
	166
	167	might_sleep();
	168
	169	if (!check_sdata_in_driver(sdata))
	170	return -EIO;
	171
	172	if (WARN_ONCE(params->cw_min == 0 \|\|
	173	params->cw_min > params->cw_max,
	174	"%s: invalid CW_min/CW_max: %d/%d\n",
	175	sdata->name, params->cw_min, params->cw_max))
	176	return -EINVAL;
	177
	178	trace_drv_conf_tx(local, sdata, ac, params);
	179	if (local->ops->conf_tx)
	180	ret = local->ops->conf_tx(&local->hw, &sdata->vif,
	181	ac, params);
	182	trace_drv_return_int(local, ret);
	183	return ret;
	184	}
42677ed3	185
416eb9fc DV	186	u64 drv_get_tsf(struct ieee80211_local *local,
	187	struct ieee80211_sub_if_data *sdata)
	188	{
	189	u64 ret = -1ULL;
	190
	191	might_sleep();
	192
	193	if (!check_sdata_in_driver(sdata))
	194	return ret;
	195
	196	trace_drv_get_tsf(local, sdata);
	197	if (local->ops->get_tsf)
	198	ret = local->ops->get_tsf(&local->hw, &sdata->vif);
	199	trace_drv_return_u64(local, ret);
	200	return ret;
	201	}
	202
	203	void drv_set_tsf(struct ieee80211_local *local,
	204	struct ieee80211_sub_if_data *sdata,
	205	u64 tsf)
	206	{
	207	might_sleep();
	208
	209	if (!check_sdata_in_driver(sdata))
	210	return;
	211
	212	trace_drv_set_tsf(local, sdata, tsf);
	213	if (local->ops->set_tsf)
	214	local->ops->set_tsf(&local->hw, &sdata->vif, tsf);
	215	trace_drv_return_void(local);
	216	}
	217
354d381b PT	218	void drv_offset_tsf(struct ieee80211_local *local,
	219	struct ieee80211_sub_if_data *sdata,
	220	s64 offset)
	221	{
	222	might_sleep();
	223
	224	if (!check_sdata_in_driver(sdata))
	225	return;
	226
	227	trace_drv_offset_tsf(local, sdata, offset);
	228	if (local->ops->offset_tsf)
	229	local->ops->offset_tsf(&local->hw, &sdata->vif, offset);
	230	trace_drv_return_void(local);
	231	}
	232
416eb9fc DV	233	void drv_reset_tsf(struct ieee80211_local *local,
	234	struct ieee80211_sub_if_data *sdata)
	235	{
	236	might_sleep();
	237
	238	if (!check_sdata_in_driver(sdata))
	239	return;
	240
	241	trace_drv_reset_tsf(local, sdata);
	242	if (local->ops->reset_tsf)
	243	local->ops->reset_tsf(&local->hw, &sdata->vif);
	244	trace_drv_return_void(local);
	245	}
	246
42677ed3 DV	247	int drv_switch_vif_chanctx(struct ieee80211_local *local,
	248	struct ieee80211_vif_chanctx_switch *vifs,
	249	int n_vifs, enum ieee80211_chanctx_switch_mode mode)
	250	{
	251	int ret = 0;
	252	int i;
	253
dcae9e02 C	254	might_sleep();
dcae9e02 C	255
42677ed3 DV	256	if (!local->ops->switch_vif_chanctx)
	257	return -EOPNOTSUPP;
	258
	259	for (i = 0; i < n_vifs; i++) {
	260	struct ieee80211_chanctx *new_ctx =
	261	container_of(vifs[i].new_ctx,
	262	struct ieee80211_chanctx,
	263	conf);
	264	struct ieee80211_chanctx *old_ctx =
	265	container_of(vifs[i].old_ctx,
	266	struct ieee80211_chanctx,
	267	conf);
	268
	269	WARN_ON_ONCE(!old_ctx->driver_present);
	270	WARN_ON_ONCE((mode == CHANCTX_SWMODE_SWAP_CONTEXTS &&
	271	new_ctx->driver_present) \|\|
	272	(mode == CHANCTX_SWMODE_REASSIGN_VIF &&
	273	!new_ctx->driver_present));
	274	}
	275
	276	trace_drv_switch_vif_chanctx(local, vifs, n_vifs, mode);
	277	ret = local->ops->switch_vif_chanctx(&local->hw,
	278	vifs, n_vifs, mode);
	279	trace_drv_return_int(local, ret);
	280
	281	if (!ret && mode == CHANCTX_SWMODE_SWAP_CONTEXTS) {
	282	for (i = 0; i < n_vifs; i++) {
	283	struct ieee80211_chanctx *new_ctx =
	284	container_of(vifs[i].new_ctx,
	285	struct ieee80211_chanctx,
	286	conf);
	287	struct ieee80211_chanctx *old_ctx =
	288	container_of(vifs[i].old_ctx,
	289	struct ieee80211_chanctx,
	290	conf);
	291
	292	new_ctx->driver_present = true;
	293	old_ctx->driver_present = false;
	294	}
	295	}
	296
	297	return ret;
	298	}
6db96838 DV	299
	300	int drv_ampdu_action(struct ieee80211_local *local,
	301	struct ieee80211_sub_if_data *sdata,
50ea05ef	302	struct ieee80211_ampdu_params *params)
6db96838 DV	303	{
	304	int ret = -EOPNOTSUPP;
	305
	306	might_sleep();
	307
	308	sdata = get_bss_sdata(sdata);
	309	if (!check_sdata_in_driver(sdata))
	310	return -EIO;
	311
50ea05ef	312	trace_drv_ampdu_action(local, sdata, params);
6db96838 DV	313
6db96838 DV	314	if (local->ops->ampdu_action)
50ea05ef	315	ret = local->ops->ampdu_action(&local->hw, &sdata->vif, params);
6db96838 DV	316
	317	trace_drv_return_int(local, ret);
	318
	319	return ret;
	320	}