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linux/drivers/net/wireless/brcm80211/brcmfmac/p2p.c

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/*
* Copyright (c) 2012 Broadcom Corporation
*
* 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/slab.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <net/cfg80211.h>
#include <brcmu_wifi.h>
#include <brcmu_utils.h>
#include <defs.h>
#include <dhd.h>
#include <dhd_dbg.h>
#include "fwil.h"
#include "fwil_types.h"
#include "p2p.h"
#include "wl_cfg80211.h"
/* parameters used for p2p escan */
#define P2PAPI_SCAN_NPROBES 1
#define P2PAPI_SCAN_DWELL_TIME_MS 80
#define P2PAPI_SCAN_SOCIAL_DWELL_TIME_MS 40
#define P2PAPI_SCAN_HOME_TIME_MS 60
#define P2PAPI_SCAN_NPROBS_TIME_MS 30
#define P2PAPI_SCAN_AF_SEARCH_DWELL_TIME_MS 100
#define WL_SCAN_CONNECT_DWELL_TIME_MS 200
#define WL_SCAN_JOIN_PROBE_INTERVAL_MS 20
#define BRCMF_P2P_WILDCARD_SSID "DIRECT-"
#define BRCMF_P2P_WILDCARD_SSID_LEN (sizeof(BRCMF_P2P_WILDCARD_SSID) - 1)
#define SOCIAL_CHAN_1 1
#define SOCIAL_CHAN_2 6
#define SOCIAL_CHAN_3 11
#define IS_P2P_SOCIAL_CHANNEL(channel) ((channel == SOCIAL_CHAN_1) || \
(channel == SOCIAL_CHAN_2) || \
(channel == SOCIAL_CHAN_3))
#define BRCMF_P2P_TEMP_CHAN SOCIAL_CHAN_3
#define SOCIAL_CHAN_CNT 3
#define AF_PEER_SEARCH_CNT 2
#define BRCMF_SCB_TIMEOUT_VALUE 20
#define P2P_VER 9 /* P2P version: 9=WiFi P2P v1.0 */
#define P2P_PUB_AF_CATEGORY 0x04
#define P2P_PUB_AF_ACTION 0x09
#define P2P_AF_CATEGORY 0x7f
#define P2P_OUI "\x50\x6F\x9A" /* P2P OUI */
#define P2P_OUI_LEN 3 /* P2P OUI length */
/* Action Frame Constants */
#define DOT11_ACTION_HDR_LEN 2 /* action frame category + action */
#define DOT11_ACTION_CAT_OFF 0 /* category offset */
#define DOT11_ACTION_ACT_OFF 1 /* action offset */
#define P2P_AF_DWELL_TIME 200
#define P2P_AF_MIN_DWELL_TIME 100
#define P2P_AF_MED_DWELL_TIME 400
#define P2P_AF_LONG_DWELL_TIME 1000
#define P2P_AF_TX_MAX_RETRY 1
#define P2P_AF_MAX_WAIT_TIME 2000
#define P2P_INVALID_CHANNEL -1
#define P2P_CHANNEL_SYNC_RETRY 5
#define P2P_AF_FRM_SCAN_MAX_WAIT 1500
#define P2P_DEFAULT_SLEEP_TIME_VSDB 200
/* WiFi P2P Public Action Frame OUI Subtypes */
#define P2P_PAF_GON_REQ 0 /* Group Owner Negotiation Req */
#define P2P_PAF_GON_RSP 1 /* Group Owner Negotiation Rsp */
#define P2P_PAF_GON_CONF 2 /* Group Owner Negotiation Confirm */
#define P2P_PAF_INVITE_REQ 3 /* P2P Invitation Request */
#define P2P_PAF_INVITE_RSP 4 /* P2P Invitation Response */
#define P2P_PAF_DEVDIS_REQ 5 /* Device Discoverability Request */
#define P2P_PAF_DEVDIS_RSP 6 /* Device Discoverability Response */
#define P2P_PAF_PROVDIS_REQ 7 /* Provision Discovery Request */
#define P2P_PAF_PROVDIS_RSP 8 /* Provision Discovery Response */
#define P2P_PAF_SUBTYPE_INVALID 255 /* Invalid Subtype */
/* WiFi P2P Action Frame OUI Subtypes */
#define P2P_AF_NOTICE_OF_ABSENCE 0 /* Notice of Absence */
#define P2P_AF_PRESENCE_REQ 1 /* P2P Presence Request */
#define P2P_AF_PRESENCE_RSP 2 /* P2P Presence Response */
#define P2P_AF_GO_DISC_REQ 3 /* GO Discoverability Request */
/* P2P Service Discovery related */
#define P2PSD_ACTION_CATEGORY 0x04 /* Public action frame */
#define P2PSD_ACTION_ID_GAS_IREQ 0x0a /* GAS Initial Request AF */
#define P2PSD_ACTION_ID_GAS_IRESP 0x0b /* GAS Initial Response AF */
#define P2PSD_ACTION_ID_GAS_CREQ 0x0c /* GAS Comback Request AF */
#define P2PSD_ACTION_ID_GAS_CRESP 0x0d /* GAS Comback Response AF */
/**
* struct brcmf_p2p_disc_st_le - set discovery state in firmware.
*
* @state: requested discovery state (see enum brcmf_p2p_disc_state).
* @chspec: channel parameter for %WL_P2P_DISC_ST_LISTEN state.
* @dwell: dwell time in ms for %WL_P2P_DISC_ST_LISTEN state.
*/
struct brcmf_p2p_disc_st_le {
u8 state;
__le16 chspec;
__le16 dwell;
};
/**
* enum brcmf_p2p_disc_state - P2P discovery state values
*
* @WL_P2P_DISC_ST_SCAN: P2P discovery with wildcard SSID and P2P IE.
* @WL_P2P_DISC_ST_LISTEN: P2P discovery off-channel for specified time.
* @WL_P2P_DISC_ST_SEARCH: P2P discovery with P2P wildcard SSID and P2P IE.
*/
enum brcmf_p2p_disc_state {
WL_P2P_DISC_ST_SCAN,
WL_P2P_DISC_ST_LISTEN,
WL_P2P_DISC_ST_SEARCH
};
/**
* struct brcmf_p2p_scan_le - P2P specific scan request.
*
* @type: type of scan method requested (values: 'E' or 'S').
* @reserved: reserved (ignored).
* @eparams: parameters used for type 'E'.
* @sparams: parameters used for type 'S'.
*/
struct brcmf_p2p_scan_le {
u8 type;
u8 reserved[3];
union {
struct brcmf_escan_params_le eparams;
struct brcmf_scan_params_le sparams;
};
};
/**
* struct brcmf_p2p_pub_act_frame - WiFi P2P Public Action Frame
*
* @category: P2P_PUB_AF_CATEGORY
* @action: P2P_PUB_AF_ACTION
* @oui[3]: P2P_OUI
* @oui_type: OUI type - P2P_VER
* @subtype: OUI subtype - P2P_TYPE_*
* @dialog_token: nonzero, identifies req/rsp transaction
* @elts[1]: Variable length information elements.
*/
struct brcmf_p2p_pub_act_frame {
u8 category;
u8 action;
u8 oui[3];
u8 oui_type;
u8 subtype;
u8 dialog_token;
u8 elts[1];
};
/**
* struct brcmf_p2p_action_frame - WiFi P2P Action Frame
*
* @category: P2P_AF_CATEGORY
* @OUI[3]: OUI - P2P_OUI
* @type: OUI Type - P2P_VER
* @subtype: OUI Subtype - P2P_AF_*
* @dialog_token: nonzero, identifies req/resp tranaction
* @elts[1]: Variable length information elements.
*/
struct brcmf_p2p_action_frame {
u8 category;
u8 oui[3];
u8 type;
u8 subtype;
u8 dialog_token;
u8 elts[1];
};
/**
* struct brcmf_p2psd_gas_pub_act_frame - Wi-Fi GAS Public Action Frame
*
* @category: 0x04 Public Action Frame
* @action: 0x6c Advertisement Protocol
* @dialog_token: nonzero, identifies req/rsp transaction
* @query_data[1]: Query Data. SD gas ireq SD gas iresp
*/
struct brcmf_p2psd_gas_pub_act_frame {
u8 category;
u8 action;
u8 dialog_token;
u8 query_data[1];
};
/**
* struct brcmf_config_af_params - Action Frame Parameters for tx.
*
* @mpc_onoff: To make sure to send successfully action frame, we have to
* turn off mpc 0: off, 1: on, (-1): do nothing
* @search_channel: 1: search peer's channel to send af
* extra_listen: keep the dwell time to get af response frame.
*/
struct brcmf_config_af_params {
s32 mpc_onoff;
bool search_channel;
bool extra_listen;
};
/**
* brcmf_p2p_is_pub_action() - true if p2p public type frame.
*
* @frame: action frame data.
* @frame_len: length of action frame data.
*
* Determine if action frame is p2p public action type
*/
static bool brcmf_p2p_is_pub_action(void *frame, u32 frame_len)
{
struct brcmf_p2p_pub_act_frame *pact_frm;
if (frame == NULL)
return false;
pact_frm = (struct brcmf_p2p_pub_act_frame *)frame;
if (frame_len < sizeof(struct brcmf_p2p_pub_act_frame) - 1)
return false;
if (pact_frm->category == P2P_PUB_AF_CATEGORY &&
pact_frm->action == P2P_PUB_AF_ACTION &&
pact_frm->oui_type == P2P_VER &&
memcmp(pact_frm->oui, P2P_OUI, P2P_OUI_LEN) == 0)
return true;
return false;
}
/**
* brcmf_p2p_is_p2p_action() - true if p2p action type frame.
*
* @frame: action frame data.
* @frame_len: length of action frame data.
*
* Determine if action frame is p2p action type
*/
static bool brcmf_p2p_is_p2p_action(void *frame, u32 frame_len)
{
struct brcmf_p2p_action_frame *act_frm;
if (frame == NULL)
return false;
act_frm = (struct brcmf_p2p_action_frame *)frame;
if (frame_len < sizeof(struct brcmf_p2p_action_frame) - 1)
return false;
if (act_frm->category == P2P_AF_CATEGORY &&
act_frm->type == P2P_VER &&
memcmp(act_frm->oui, P2P_OUI, P2P_OUI_LEN) == 0)
return true;
return false;
}
/**
* brcmf_p2p_is_gas_action() - true if p2p gas action type frame.
*
* @frame: action frame data.
* @frame_len: length of action frame data.
*
* Determine if action frame is p2p gas action type
*/
static bool brcmf_p2p_is_gas_action(void *frame, u32 frame_len)
{
struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm;
if (frame == NULL)
return false;
sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame;
if (frame_len < sizeof(struct brcmf_p2psd_gas_pub_act_frame) - 1)
return false;
if (sd_act_frm->category != P2PSD_ACTION_CATEGORY)
return false;
if (sd_act_frm->action == P2PSD_ACTION_ID_GAS_IREQ ||
sd_act_frm->action == P2PSD_ACTION_ID_GAS_IRESP ||
sd_act_frm->action == P2PSD_ACTION_ID_GAS_CREQ ||
sd_act_frm->action == P2PSD_ACTION_ID_GAS_CRESP)
return true;
return false;
}
/**
* brcmf_p2p_print_actframe() - debug print routine.
*
* @tx: Received or to be transmitted
* @frame: action frame data.
* @frame_len: length of action frame data.
*
* Print information about the p2p action frame
*/
#ifdef DEBUG
static void brcmf_p2p_print_actframe(bool tx, void *frame, u32 frame_len)
{
struct brcmf_p2p_pub_act_frame *pact_frm;
struct brcmf_p2p_action_frame *act_frm;
struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm;
if (!frame || frame_len <= 2)
return;
if (brcmf_p2p_is_pub_action(frame, frame_len)) {
pact_frm = (struct brcmf_p2p_pub_act_frame *)frame;
switch (pact_frm->subtype) {
case P2P_PAF_GON_REQ:
brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Req Frame\n",
(tx) ? "TX" : "RX");
break;
case P2P_PAF_GON_RSP:
brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Rsp Frame\n",
(tx) ? "TX" : "RX");
break;
case P2P_PAF_GON_CONF:
brcmf_dbg(TRACE, "%s P2P Group Owner Negotiation Confirm Frame\n",
(tx) ? "TX" : "RX");
break;
case P2P_PAF_INVITE_REQ:
brcmf_dbg(TRACE, "%s P2P Invitation Request Frame\n",
(tx) ? "TX" : "RX");
break;
case P2P_PAF_INVITE_RSP:
brcmf_dbg(TRACE, "%s P2P Invitation Response Frame\n",
(tx) ? "TX" : "RX");
break;
case P2P_PAF_DEVDIS_REQ:
brcmf_dbg(TRACE, "%s P2P Device Discoverability Request Frame\n",
(tx) ? "TX" : "RX");
break;
case P2P_PAF_DEVDIS_RSP:
brcmf_dbg(TRACE, "%s P2P Device Discoverability Response Frame\n",
(tx) ? "TX" : "RX");
break;
case P2P_PAF_PROVDIS_REQ:
brcmf_dbg(TRACE, "%s P2P Provision Discovery Request Frame\n",
(tx) ? "TX" : "RX");
break;
case P2P_PAF_PROVDIS_RSP:
brcmf_dbg(TRACE, "%s P2P Provision Discovery Response Frame\n",
(tx) ? "TX" : "RX");
break;
default:
brcmf_dbg(TRACE, "%s Unknown P2P Public Action Frame\n",
(tx) ? "TX" : "RX");
break;
}
} else if (brcmf_p2p_is_p2p_action(frame, frame_len)) {
act_frm = (struct brcmf_p2p_action_frame *)frame;
switch (act_frm->subtype) {
case P2P_AF_NOTICE_OF_ABSENCE:
brcmf_dbg(TRACE, "%s P2P Notice of Absence Frame\n",
(tx) ? "TX" : "RX");
break;
case P2P_AF_PRESENCE_REQ:
brcmf_dbg(TRACE, "%s P2P Presence Request Frame\n",
(tx) ? "TX" : "RX");
break;
case P2P_AF_PRESENCE_RSP:
brcmf_dbg(TRACE, "%s P2P Presence Response Frame\n",
(tx) ? "TX" : "RX");
break;
case P2P_AF_GO_DISC_REQ:
brcmf_dbg(TRACE, "%s P2P Discoverability Request Frame\n",
(tx) ? "TX" : "RX");
break;
default:
brcmf_dbg(TRACE, "%s Unknown P2P Action Frame\n",
(tx) ? "TX" : "RX");
}
} else if (brcmf_p2p_is_gas_action(frame, frame_len)) {
sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame;
switch (sd_act_frm->action) {
case P2PSD_ACTION_ID_GAS_IREQ:
brcmf_dbg(TRACE, "%s P2P GAS Initial Request\n",
(tx) ? "TX" : "RX");
break;
case P2PSD_ACTION_ID_GAS_IRESP:
brcmf_dbg(TRACE, "%s P2P GAS Initial Response\n",
(tx) ? "TX" : "RX");
break;
case P2PSD_ACTION_ID_GAS_CREQ:
brcmf_dbg(TRACE, "%s P2P GAS Comback Request\n",
(tx) ? "TX" : "RX");
break;
case P2PSD_ACTION_ID_GAS_CRESP:
brcmf_dbg(TRACE, "%s P2P GAS Comback Response\n",
(tx) ? "TX" : "RX");
break;
default:
brcmf_dbg(TRACE, "%s Unknown P2P GAS Frame\n",
(tx) ? "TX" : "RX");
break;
}
}
}
#else
static void brcmf_p2p_print_actframe(bool tx, void *frame, u32 frame_len)
{
}
#endif
/**
* brcmf_p2p_set_firmware() - prepare firmware for peer-to-peer operation.
*
* @ifp: ifp to use for iovars (primary).
* @p2p_mac: mac address to configure for p2p_da_override
*/
static int brcmf_p2p_set_firmware(struct brcmf_if *ifp, u8 *p2p_mac)
{
s32 ret = 0;
brcmf_fil_cmd_int_set(ifp, BRCMF_C_DOWN, 1);
brcmf_fil_iovar_int_set(ifp, "apsta", 1);
brcmf_fil_cmd_int_set(ifp, BRCMF_C_UP, 1);
/* In case of COB type, firmware has default mac address
* After Initializing firmware, we have to set current mac address to
* firmware for P2P device address
*/
ret = brcmf_fil_iovar_data_set(ifp, "p2p_da_override", p2p_mac,
ETH_ALEN);
if (ret)
brcmf_err("failed to update device address ret %d\n", ret);
return ret;
}
/**
* brcmf_p2p_generate_bss_mac() - derive mac addresses for P2P.
*
* @p2p: P2P specific data.
* @dev_addr: optional device address.
*
* P2P needs mac addresses for P2P device and interface. If no device
* address it specified, these are derived from the primary net device, ie.
* the permanent ethernet address of the device.
*/
static void brcmf_p2p_generate_bss_mac(struct brcmf_p2p_info *p2p, u8 *dev_addr)
{
struct brcmf_if *pri_ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
bool local_admin = false;
if (!dev_addr || is_zero_ether_addr(dev_addr)) {
dev_addr = pri_ifp->mac_addr;
local_admin = true;
}
/* Generate the P2P Device Address. This consists of the device's
* primary MAC address with the locally administered bit set.
*/
memcpy(p2p->dev_addr, dev_addr, ETH_ALEN);
if (local_admin)
p2p->dev_addr[0] |= 0x02;
/* Generate the P2P Interface Address. If the discovery and connection
* BSSCFGs need to simultaneously co-exist, then this address must be
* different from the P2P Device Address, but also locally administered.
*/
memcpy(p2p->int_addr, p2p->dev_addr, ETH_ALEN);
p2p->int_addr[0] |= 0x02;
p2p->int_addr[4] ^= 0x80;
}
/**
* brcmf_p2p_scan_is_p2p_request() - is cfg80211 scan request a P2P scan.
*
* @request: the scan request as received from cfg80211.
*
* returns true if one of the ssids in the request matches the
* P2P wildcard ssid; otherwise returns false.
*/
static bool brcmf_p2p_scan_is_p2p_request(struct cfg80211_scan_request *request)
{
struct cfg80211_ssid *ssids = request->ssids;
int i;
for (i = 0; i < request->n_ssids; i++) {
if (ssids[i].ssid_len != BRCMF_P2P_WILDCARD_SSID_LEN)
continue;
brcmf_dbg(INFO, "comparing ssid \"%s\"", ssids[i].ssid);
if (!memcmp(BRCMF_P2P_WILDCARD_SSID, ssids[i].ssid,
BRCMF_P2P_WILDCARD_SSID_LEN))
return true;
}
return false;
}
/**
* brcmf_p2p_set_discover_state - set discover state in firmware.
*
* @ifp: low-level interface object.
* @state: discover state to set.
* @chanspec: channel parameters (for state @WL_P2P_DISC_ST_LISTEN only).
* @listen_ms: duration to listen (for state @WL_P2P_DISC_ST_LISTEN only).
*/
static s32 brcmf_p2p_set_discover_state(struct brcmf_if *ifp, u8 state,
u16 chanspec, u16 listen_ms)
{
struct brcmf_p2p_disc_st_le discover_state;
s32 ret = 0;
brcmf_dbg(TRACE, "enter\n");
discover_state.state = state;
discover_state.chspec = cpu_to_le16(chanspec);
discover_state.dwell = cpu_to_le16(listen_ms);
ret = brcmf_fil_bsscfg_data_set(ifp, "p2p_state", &discover_state,
sizeof(discover_state));
return ret;
}
/**
* brcmf_p2p_deinit_discovery() - disable P2P device discovery.
*
* @p2p: P2P specific data.
*
* Resets the discovery state and disables it in firmware.
*/
static s32 brcmf_p2p_deinit_discovery(struct brcmf_p2p_info *p2p)
{
struct brcmf_cfg80211_vif *vif;
brcmf_dbg(TRACE, "enter\n");
/* Set the discovery state to SCAN */
vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
(void)brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0);
/* Disable P2P discovery in the firmware */
vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
(void)brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 0);
return 0;
}
/**
* brcmf_p2p_enable_discovery() - initialize and configure discovery.
*
* @p2p: P2P specific data.
*
* Initializes the discovery device and configure the virtual interface.
*/
static int brcmf_p2p_enable_discovery(struct brcmf_p2p_info *p2p)
{
struct brcmf_cfg80211_vif *vif;
s32 ret = 0;
brcmf_dbg(TRACE, "enter\n");
vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
if (!vif) {
brcmf_err("P2P config device not available\n");
ret = -EPERM;
goto exit;
}
if (test_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status)) {
brcmf_dbg(INFO, "P2P config device already configured\n");
goto exit;
}
/* Re-initialize P2P Discovery in the firmware */
vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
ret = brcmf_fil_iovar_int_set(vif->ifp, "p2p_disc", 1);
if (ret < 0) {
brcmf_err("set p2p_disc error\n");
goto exit;
}
vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
ret = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_SCAN, 0, 0);
if (ret < 0) {
brcmf_err("unable to set WL_P2P_DISC_ST_SCAN\n");
goto exit;
}
/*
* Set wsec to any non-zero value in the discovery bsscfg
* to ensure our P2P probe responses have the privacy bit
* set in the 802.11 WPA IE. Some peer devices may not
* initiate WPS with us if this bit is not set.
*/
ret = brcmf_fil_bsscfg_int_set(vif->ifp, "wsec", AES_ENABLED);
if (ret < 0) {
brcmf_err("wsec error %d\n", ret);
goto exit;
}
set_bit(BRCMF_P2P_STATUS_ENABLED, &p2p->status);
exit:
return ret;
}
/**
* brcmf_p2p_escan() - initiate a P2P scan.
*
* @p2p: P2P specific data.
* @num_chans: number of channels to scan.
* @chanspecs: channel parameters for @num_chans channels.
* @search_state: P2P discover state to use.
* @action: scan action to pass to firmware.
* @bss_type: type of P2P bss.
*/
static s32 brcmf_p2p_escan(struct brcmf_p2p_info *p2p, u32 num_chans,
u16 chanspecs[], s32 search_state, u16 action,
enum p2p_bss_type bss_type)
{
s32 ret = 0;
s32 memsize = offsetof(struct brcmf_p2p_scan_le,
eparams.params_le.channel_list);
s32 nprobes;
s32 active;
u32 i;
u8 *memblk;
struct brcmf_cfg80211_vif *vif;
struct brcmf_p2p_scan_le *p2p_params;
struct brcmf_scan_params_le *sparams;
struct brcmf_ssid ssid;
memsize += num_chans * sizeof(__le16);
memblk = kzalloc(memsize, GFP_KERNEL);
if (!memblk)
return -ENOMEM;
vif = p2p->bss_idx[bss_type].vif;
if (vif == NULL) {
brcmf_err("no vif for bss type %d\n", bss_type);
ret = -EINVAL;
goto exit;
}
switch (search_state) {
case WL_P2P_DISC_ST_SEARCH:
/*
* If we in SEARCH STATE, we don't need to set SSID explictly
* because dongle use P2P WILDCARD internally by default
*/
/* use null ssid */
ssid.SSID_len = 0;
memset(ssid.SSID, 0, sizeof(ssid.SSID));
break;
case WL_P2P_DISC_ST_SCAN:
/*
* wpa_supplicant has p2p_find command with type social or
* progressive. For progressive, we need to set the ssid to
* P2P WILDCARD because we just do broadcast scan unless
* setting SSID.
*/
ssid.SSID_len = BRCMF_P2P_WILDCARD_SSID_LEN;
memcpy(ssid.SSID, BRCMF_P2P_WILDCARD_SSID, ssid.SSID_len);
break;
default:
brcmf_err(" invalid search state %d\n", search_state);
ret = -EINVAL;
goto exit;
}
brcmf_p2p_set_discover_state(vif->ifp, search_state, 0, 0);
/*
* set p2p scan parameters.
*/
p2p_params = (struct brcmf_p2p_scan_le *)memblk;
p2p_params->type = 'E';
/* determine the scan engine parameters */
sparams = &p2p_params->eparams.params_le;
sparams->bss_type = DOT11_BSSTYPE_ANY;
if (p2p->cfg->active_scan)
sparams->scan_type = 0;
else
sparams->scan_type = 1;
memset(&sparams->bssid, 0xFF, ETH_ALEN);
if (ssid.SSID_len)
memcpy(sparams->ssid_le.SSID, ssid.SSID, ssid.SSID_len);
sparams->ssid_le.SSID_len = cpu_to_le32(ssid.SSID_len);
sparams->home_time = cpu_to_le32(P2PAPI_SCAN_HOME_TIME_MS);
/*
* SOCIAL_CHAN_CNT + 1 takes care of the Progressive scan
* supported by the supplicant.
*/
if (num_chans == SOCIAL_CHAN_CNT || num_chans == (SOCIAL_CHAN_CNT + 1))
active = P2PAPI_SCAN_SOCIAL_DWELL_TIME_MS;
else if (num_chans == AF_PEER_SEARCH_CNT)
active = P2PAPI_SCAN_AF_SEARCH_DWELL_TIME_MS;
else if (wl_get_vif_state_all(p2p->cfg, BRCMF_VIF_STATUS_CONNECTED))
active = -1;
else
active = P2PAPI_SCAN_DWELL_TIME_MS;
/* Override scan params to find a peer for a connection */
if (num_chans == 1) {
active = WL_SCAN_CONNECT_DWELL_TIME_MS;
/* WAR to sync with presence period of VSDB GO.
* send probe request more frequently
*/
nprobes = active / WL_SCAN_JOIN_PROBE_INTERVAL_MS;
} else {
nprobes = active / P2PAPI_SCAN_NPROBS_TIME_MS;
}
if (nprobes <= 0)
nprobes = 1;
brcmf_dbg(INFO, "nprobes # %d, active_time %d\n", nprobes, active);
sparams->active_time = cpu_to_le32(active);
sparams->nprobes = cpu_to_le32(nprobes);
sparams->passive_time = cpu_to_le32(-1);
sparams->channel_num = cpu_to_le32(num_chans &
BRCMF_SCAN_PARAMS_COUNT_MASK);
for (i = 0; i < num_chans; i++)
sparams->channel_list[i] = cpu_to_le16(chanspecs[i]);
/* set the escan specific parameters */
p2p_params->eparams.version = cpu_to_le32(BRCMF_ESCAN_REQ_VERSION);
p2p_params->eparams.action = cpu_to_le16(action);
p2p_params->eparams.sync_id = cpu_to_le16(0x1234);
/* perform p2p scan on primary device */
ret = brcmf_fil_bsscfg_data_set(vif->ifp, "p2p_scan", memblk, memsize);
if (!ret)
set_bit(BRCMF_SCAN_STATUS_BUSY, &p2p->cfg->scan_status);
exit:
kfree(memblk);
return ret;
}
/**
* brcmf_p2p_run_escan() - escan callback for peer-to-peer.
*
* @cfg: driver private data for cfg80211 interface.
* @ndev: net device for which scan is requested.
* @request: scan request from cfg80211.
* @action: scan action.
*
* Determines the P2P discovery state based to scan request parameters and
* validates the channels in the request.
*/
static s32 brcmf_p2p_run_escan(struct brcmf_cfg80211_info *cfg,
struct brcmf_if *ifp,
struct cfg80211_scan_request *request,
u16 action)
{
struct brcmf_p2p_info *p2p = &cfg->p2p;
s32 err = 0;
s32 search_state = WL_P2P_DISC_ST_SCAN;
struct brcmf_cfg80211_vif *vif;
struct net_device *dev = NULL;
int i, num_nodfs = 0;
u16 *chanspecs;
brcmf_dbg(TRACE, "enter\n");
if (!request) {
err = -EINVAL;
goto exit;
}
if (request->n_channels) {
chanspecs = kcalloc(request->n_channels, sizeof(*chanspecs),
GFP_KERNEL);
if (!chanspecs) {
err = -ENOMEM;
goto exit;
}
vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif;
if (vif)
dev = vif->wdev.netdev;
if (request->n_channels == 3 &&
request->channels[0]->hw_value == SOCIAL_CHAN_1 &&
request->channels[1]->hw_value == SOCIAL_CHAN_2 &&
request->channels[2]->hw_value == SOCIAL_CHAN_3) {
/* SOCIAL CHANNELS 1, 6, 11 */
search_state = WL_P2P_DISC_ST_SEARCH;
brcmf_dbg(INFO, "P2P SEARCH PHASE START\n");
} else if (dev != NULL && vif->mode == WL_MODE_AP) {
/* If you are already a GO, then do SEARCH only */
brcmf_dbg(INFO, "Already a GO. Do SEARCH Only\n");
search_state = WL_P2P_DISC_ST_SEARCH;
} else {
brcmf_dbg(INFO, "P2P SCAN STATE START\n");
}
/*
* no P2P scanning on passive or DFS channels.
*/
for (i = 0; i < request->n_channels; i++) {
struct ieee80211_channel *chan = request->channels[i];
if (chan->flags & (IEEE80211_CHAN_RADAR |
IEEE80211_CHAN_NO_IR))
continue;
chanspecs[i] = channel_to_chanspec(&p2p->cfg->d11inf,
chan);
brcmf_dbg(INFO, "%d: chan=%d, channel spec=%x\n",
num_nodfs, chan->hw_value, chanspecs[i]);
num_nodfs++;
}
err = brcmf_p2p_escan(p2p, num_nodfs, chanspecs, search_state,
action, P2PAPI_BSSCFG_DEVICE);
kfree(chanspecs);
}
exit:
if (err)
brcmf_err("error (%d)\n", err);
return err;
}
/**
* brcmf_p2p_find_listen_channel() - find listen channel in ie string.
*
* @ie: string of information elements.
* @ie_len: length of string.
*
* Scan ie for p2p ie and look for attribute 6 channel. If available determine
* channel and return it.
*/
static s32 brcmf_p2p_find_listen_channel(const u8 *ie, u32 ie_len)
{
u8 channel_ie[5];
s32 listen_channel;
s32 err;
err = cfg80211_get_p2p_attr(ie, ie_len,
IEEE80211_P2P_ATTR_LISTEN_CHANNEL,
channel_ie, sizeof(channel_ie));
if (err < 0)
return err;
/* listen channel subel length format: */
/* 3(country) + 1(op. class) + 1(chan num) */
listen_channel = (s32)channel_ie[3 + 1];
if (listen_channel == SOCIAL_CHAN_1 ||
listen_channel == SOCIAL_CHAN_2 ||
listen_channel == SOCIAL_CHAN_3) {
brcmf_dbg(INFO, "Found my Listen Channel %d\n", listen_channel);
return listen_channel;
}
return -EPERM;
}
/**
* brcmf_p2p_scan_prep() - prepare scan based on request.
*
* @wiphy: wiphy device.
* @request: scan request from cfg80211.
* @vif: vif on which scan request is to be executed.
*
* Prepare the scan appropriately for type of scan requested. Overrides the
* escan .run() callback for peer-to-peer scanning.
*/
int brcmf_p2p_scan_prep(struct wiphy *wiphy,
struct cfg80211_scan_request *request,
struct brcmf_cfg80211_vif *vif)
{
struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
struct brcmf_p2p_info *p2p = &cfg->p2p;
int err = 0;
if (brcmf_p2p_scan_is_p2p_request(request)) {
/* find my listen channel */
err = brcmf_p2p_find_listen_channel(request->ie,
request->ie_len);
if (err < 0)
return err;
p2p->afx_hdl.my_listen_chan = err;
clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n");
err = brcmf_p2p_enable_discovery(p2p);
if (err)
return err;
vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
/* override .run_escan() callback. */
cfg->escan_info.run = brcmf_p2p_run_escan;
}
err = brcmf_vif_set_mgmt_ie(vif, BRCMF_VNDR_IE_PRBREQ_FLAG,
request->ie, request->ie_len);
return err;
}
/**
* brcmf_p2p_discover_listen() - set firmware to discover listen state.
*
* @p2p: p2p device.
* @channel: channel nr for discover listen.
* @duration: time in ms to stay on channel.
*
*/
static s32
brcmf_p2p_discover_listen(struct brcmf_p2p_info *p2p, u16 channel, u32 duration)
{
struct brcmf_cfg80211_vif *vif;
struct brcmu_chan ch;
s32 err = 0;
vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
if (!vif) {
brcmf_err("Discovery is not set, so we have nothing to do\n");
err = -EPERM;
goto exit;
}
if (test_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status)) {
brcmf_err("Previous LISTEN is not completed yet\n");
/* WAR: prevent cookie mismatch in wpa_supplicant return OK */
goto exit;
}
ch.chnum = channel;
ch.bw = BRCMU_CHAN_BW_20;
p2p->cfg->d11inf.encchspec(&ch);
err = brcmf_p2p_set_discover_state(vif->ifp, WL_P2P_DISC_ST_LISTEN,
ch.chspec, (u16)duration);
if (!err) {
set_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN, &p2p->status);
p2p->remain_on_channel_cookie++;
}
exit:
return err;
}
/**
* brcmf_p2p_remain_on_channel() - put device on channel and stay there.
*
* @wiphy: wiphy device.
* @channel: channel to stay on.
* @duration: time in ms to remain on channel.
*
*/
int brcmf_p2p_remain_on_channel(struct wiphy *wiphy, struct wireless_dev *wdev,
struct ieee80211_channel *channel,
unsigned int duration, u64 *cookie)
{
struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
struct brcmf_p2p_info *p2p = &cfg->p2p;
s32 err;
u16 channel_nr;
channel_nr = ieee80211_frequency_to_channel(channel->center_freq);
brcmf_dbg(TRACE, "Enter, channel: %d, duration ms (%d)\n", channel_nr,
duration);
err = brcmf_p2p_enable_discovery(p2p);
if (err)
goto exit;
err = brcmf_p2p_discover_listen(p2p, channel_nr, duration);
if (err)
goto exit;
memcpy(&p2p->remain_on_channel, channel, sizeof(*channel));
*cookie = p2p->remain_on_channel_cookie;
cfg80211_ready_on_channel(wdev, *cookie, channel, duration, GFP_KERNEL);
exit:
return err;
}
/**
* brcmf_p2p_notify_listen_complete() - p2p listen has completed.
*
* @ifp: interfac control.
* @e: event message. Not used, to make it usable for fweh event dispatcher.
* @data: payload of message. Not used.
*
*/
int brcmf_p2p_notify_listen_complete(struct brcmf_if *ifp,
const struct brcmf_event_msg *e,
void *data)
{
struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
struct brcmf_p2p_info *p2p = &cfg->p2p;
brcmf_dbg(TRACE, "Enter\n");
if (test_and_clear_bit(BRCMF_P2P_STATUS_DISCOVER_LISTEN,
&p2p->status)) {
if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
&p2p->status)) {
clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
&p2p->status);
brcmf_dbg(INFO, "Listen DONE, wake up wait_next_af\n");
complete(&p2p->wait_next_af);
}
cfg80211_remain_on_channel_expired(&ifp->vif->wdev,
p2p->remain_on_channel_cookie,
&p2p->remain_on_channel,
GFP_KERNEL);
}
return 0;
}
/**
* brcmf_p2p_cancel_remain_on_channel() - cancel p2p listen state.
*
* @ifp: interfac control.
*
*/
void brcmf_p2p_cancel_remain_on_channel(struct brcmf_if *ifp)
{
if (!ifp)
return;
brcmf_p2p_set_discover_state(ifp, WL_P2P_DISC_ST_SCAN, 0, 0);
brcmf_p2p_notify_listen_complete(ifp, NULL, NULL);
}
/**
* brcmf_p2p_act_frm_search() - search function for action frame.
*
* @p2p: p2p device.
* channel: channel on which action frame is to be trasmitted.
*
* search function to reach at common channel to send action frame. When
* channel is 0 then all social channels will be used to send af
*/
static s32 brcmf_p2p_act_frm_search(struct brcmf_p2p_info *p2p, u16 channel)
{
s32 err;
u32 channel_cnt;
u16 *default_chan_list;
u32 i;
struct brcmu_chan ch;
brcmf_dbg(TRACE, "Enter\n");
if (channel)
channel_cnt = AF_PEER_SEARCH_CNT;
else
channel_cnt = SOCIAL_CHAN_CNT;
default_chan_list = kzalloc(channel_cnt * sizeof(*default_chan_list),
GFP_KERNEL);
if (default_chan_list == NULL) {
brcmf_err("channel list allocation failed\n");
err = -ENOMEM;
goto exit;
}
ch.bw = BRCMU_CHAN_BW_20;
if (channel) {
ch.chnum = channel;
p2p->cfg->d11inf.encchspec(&ch);
/* insert same channel to the chan_list */
for (i = 0; i < channel_cnt; i++)
default_chan_list[i] = ch.chspec;
} else {
ch.chnum = SOCIAL_CHAN_1;
p2p->cfg->d11inf.encchspec(&ch);
default_chan_list[0] = ch.chspec;
ch.chnum = SOCIAL_CHAN_2;
p2p->cfg->d11inf.encchspec(&ch);
default_chan_list[1] = ch.chspec;
ch.chnum = SOCIAL_CHAN_3;
p2p->cfg->d11inf.encchspec(&ch);
default_chan_list[2] = ch.chspec;
}
err = brcmf_p2p_escan(p2p, channel_cnt, default_chan_list,
WL_P2P_DISC_ST_SEARCH, WL_ESCAN_ACTION_START,
P2PAPI_BSSCFG_DEVICE);
kfree(default_chan_list);
exit:
return err;
}
/**
* brcmf_p2p_afx_handler() - afx worker thread.
*
* @work:
*
*/
static void brcmf_p2p_afx_handler(struct work_struct *work)
{
struct afx_hdl *afx_hdl = container_of(work, struct afx_hdl, afx_work);
struct brcmf_p2p_info *p2p = container_of(afx_hdl,
struct brcmf_p2p_info,
afx_hdl);
s32 err;
if (!afx_hdl->is_active)
return;
if (afx_hdl->is_listen && afx_hdl->my_listen_chan)
/* 100ms ~ 300ms */
err = brcmf_p2p_discover_listen(p2p, afx_hdl->my_listen_chan,
100 * (1 + prandom_u32() % 3));
else
err = brcmf_p2p_act_frm_search(p2p, afx_hdl->peer_listen_chan);
if (err) {
brcmf_err("ERROR occurred! value is (%d)\n", err);
if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
&p2p->status))
complete(&afx_hdl->act_frm_scan);
}
}
/**
* brcmf_p2p_af_searching_channel() - search channel.
*
* @p2p: p2p device info struct.
*
*/
static s32 brcmf_p2p_af_searching_channel(struct brcmf_p2p_info *p2p)
{
struct afx_hdl *afx_hdl = &p2p->afx_hdl;
struct brcmf_cfg80211_vif *pri_vif;
unsigned long duration;
s32 retry;
brcmf_dbg(TRACE, "Enter\n");
pri_vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
reinit_completion(&afx_hdl->act_frm_scan);
set_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status);
afx_hdl->is_active = true;
afx_hdl->peer_chan = P2P_INVALID_CHANNEL;
/* Loop to wait until we find a peer's channel or the
* pending action frame tx is cancelled.
*/
retry = 0;
duration = msecs_to_jiffies(P2P_AF_FRM_SCAN_MAX_WAIT);
while ((retry < P2P_CHANNEL_SYNC_RETRY) &&
(afx_hdl->peer_chan == P2P_INVALID_CHANNEL)) {
afx_hdl->is_listen = false;
brcmf_dbg(TRACE, "Scheduling action frame for sending.. (%d)\n",
retry);
/* search peer on peer's listen channel */
schedule_work(&afx_hdl->afx_work);
wait_for_completion_timeout(&afx_hdl->act_frm_scan, duration);
if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) ||
(!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
&p2p->status)))
break;
if (afx_hdl->my_listen_chan) {
brcmf_dbg(TRACE, "Scheduling listen peer, channel=%d\n",
afx_hdl->my_listen_chan);
/* listen on my listen channel */
afx_hdl->is_listen = true;
schedule_work(&afx_hdl->afx_work);
wait_for_completion_timeout(&afx_hdl->act_frm_scan,
duration);
}
if ((afx_hdl->peer_chan != P2P_INVALID_CHANNEL) ||
(!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
&p2p->status)))
break;
retry++;
/* if sta is connected or connecting, sleep for a while before
* retry af tx or finding a peer
*/
if (test_bit(BRCMF_VIF_STATUS_CONNECTED, &pri_vif->sme_state) ||
test_bit(BRCMF_VIF_STATUS_CONNECTING, &pri_vif->sme_state))
msleep(P2P_DEFAULT_SLEEP_TIME_VSDB);
}
brcmf_dbg(TRACE, "Completed search/listen peer_chan=%d\n",
afx_hdl->peer_chan);
afx_hdl->is_active = false;
clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status);
return afx_hdl->peer_chan;
}
/**
* brcmf_p2p_scan_finding_common_channel() - was escan used for finding channel
*
* @cfg: common configuration struct.
* @bi: bss info struct, result from scan.
*
*/
bool brcmf_p2p_scan_finding_common_channel(struct brcmf_cfg80211_info *cfg,
struct brcmf_bss_info_le *bi)
{
struct brcmf_p2p_info *p2p = &cfg->p2p;
struct afx_hdl *afx_hdl = &p2p->afx_hdl;
struct brcmu_chan ch;
u8 *ie;
s32 err;
u8 p2p_dev_addr[ETH_ALEN];
if (!test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status))
return false;
if (bi == NULL) {
brcmf_dbg(TRACE, "ACTION FRAME SCAN Done\n");
if (afx_hdl->peer_chan == P2P_INVALID_CHANNEL)
complete(&afx_hdl->act_frm_scan);
return true;
}
ie = ((u8 *)bi) + le16_to_cpu(bi->ie_offset);
memset(p2p_dev_addr, 0, sizeof(p2p_dev_addr));
err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length),
IEEE80211_P2P_ATTR_DEVICE_INFO,
p2p_dev_addr, sizeof(p2p_dev_addr));
if (err < 0)
err = cfg80211_get_p2p_attr(ie, le32_to_cpu(bi->ie_length),
IEEE80211_P2P_ATTR_DEVICE_ID,
p2p_dev_addr, sizeof(p2p_dev_addr));
if ((err >= 0) &&
(!memcmp(p2p_dev_addr, afx_hdl->tx_dst_addr, ETH_ALEN))) {
if (!bi->ctl_ch) {
ch.chspec = le16_to_cpu(bi->chanspec);
cfg->d11inf.decchspec(&ch);
bi->ctl_ch = ch.chnum;
}
afx_hdl->peer_chan = bi->ctl_ch;
brcmf_dbg(TRACE, "ACTION FRAME SCAN : Peer %pM found, channel : %d\n",
afx_hdl->tx_dst_addr, afx_hdl->peer_chan);
complete(&afx_hdl->act_frm_scan);
}
return true;
}
/**
* brcmf_p2p_stop_wait_next_action_frame() - finish scan if af tx complete.
*
* @cfg: common configuration struct.
*
*/
static void
brcmf_p2p_stop_wait_next_action_frame(struct brcmf_cfg80211_info *cfg)
{
struct brcmf_p2p_info *p2p = &cfg->p2p;
struct brcmf_if *ifp = cfg->escan_info.ifp;
if (test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status) &&
(test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status) ||
test_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status))) {
brcmf_dbg(TRACE, "*** Wake UP ** abort actframe iovar\n");
/* if channel is not zero, "actfame" uses off channel scan.
* So abort scan for off channel completion.
*/
if (p2p->af_sent_channel)
brcmf_notify_escan_complete(cfg, ifp, true, true);
} else if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
&p2p->status)) {
brcmf_dbg(TRACE, "*** Wake UP ** abort listen for next af frame\n");
/* So abort scan to cancel listen */
brcmf_notify_escan_complete(cfg, ifp, true, true);
}
}
/**
* brcmf_p2p_gon_req_collision() - Check if go negotiaton collission
*
* @p2p: p2p device info struct.
*
* return true if recevied action frame is to be dropped.
*/
static bool
brcmf_p2p_gon_req_collision(struct brcmf_p2p_info *p2p, u8 *mac)
{
struct brcmf_cfg80211_info *cfg = p2p->cfg;
struct brcmf_if *ifp;
brcmf_dbg(TRACE, "Enter\n");
if (!test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) ||
!p2p->gon_req_action)
return false;
brcmf_dbg(TRACE, "GO Negotiation Request COLLISION !!!\n");
/* if sa(peer) addr is less than da(my) addr, then this device
* process peer's gon request and block to send gon req.
* if not (sa addr > da addr),
* this device will process gon request and drop gon req of peer.
*/
ifp = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->ifp;
if (memcmp(mac, ifp->mac_addr, ETH_ALEN) < 0) {
brcmf_dbg(INFO, "Block transmit gon req !!!\n");
p2p->block_gon_req_tx = true;
/* if we are finding a common channel for sending af,
* do not scan more to block to send current gon req
*/
if (test_and_clear_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
&p2p->status))
complete(&p2p->afx_hdl.act_frm_scan);
if (test_and_clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
&p2p->status))
brcmf_p2p_stop_wait_next_action_frame(cfg);
return false;
}
/* drop gon request of peer to process gon request by this device. */
brcmf_dbg(INFO, "Drop received gon req !!!\n");
return true;
}
/**
* brcmf_p2p_notify_action_frame_rx() - received action frame.
*
* @ifp: interfac control.
* @e: event message. Not used, to make it usable for fweh event dispatcher.
* @data: payload of message, containing action frame data.
*
*/
int brcmf_p2p_notify_action_frame_rx(struct brcmf_if *ifp,
const struct brcmf_event_msg *e,
void *data)
{
struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
struct brcmf_p2p_info *p2p = &cfg->p2p;
struct afx_hdl *afx_hdl = &p2p->afx_hdl;
struct wireless_dev *wdev;
u32 mgmt_frame_len = e->datalen - sizeof(struct brcmf_rx_mgmt_data);
struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data;
u8 *frame = (u8 *)(rxframe + 1);
struct brcmf_p2p_pub_act_frame *act_frm;
struct brcmf_p2psd_gas_pub_act_frame *sd_act_frm;
struct brcmu_chan ch;
struct ieee80211_mgmt *mgmt_frame;
s32 freq;
u16 mgmt_type;
u8 action;
ch.chspec = be16_to_cpu(rxframe->chanspec);
cfg->d11inf.decchspec(&ch);
/* Check if wpa_supplicant has registered for this frame */
brcmf_dbg(INFO, "ifp->vif->mgmt_rx_reg %04x\n", ifp->vif->mgmt_rx_reg);
mgmt_type = (IEEE80211_STYPE_ACTION & IEEE80211_FCTL_STYPE) >> 4;
if ((ifp->vif->mgmt_rx_reg & BIT(mgmt_type)) == 0)
return 0;
brcmf_p2p_print_actframe(false, frame, mgmt_frame_len);
action = P2P_PAF_SUBTYPE_INVALID;
if (brcmf_p2p_is_pub_action(frame, mgmt_frame_len)) {
act_frm = (struct brcmf_p2p_pub_act_frame *)frame;
action = act_frm->subtype;
if ((action == P2P_PAF_GON_REQ) &&
(brcmf_p2p_gon_req_collision(p2p, (u8 *)e->addr))) {
if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL,
&p2p->status) &&
(memcmp(afx_hdl->tx_dst_addr, e->addr,
ETH_ALEN) == 0)) {
afx_hdl->peer_chan = ch.chnum;
brcmf_dbg(INFO, "GON request: Peer found, channel=%d\n",
afx_hdl->peer_chan);
complete(&afx_hdl->act_frm_scan);
}
return 0;
}
/* After complete GO Negotiation, roll back to mpc mode */
if ((action == P2P_PAF_GON_CONF) ||
(action == P2P_PAF_PROVDIS_RSP))
brcmf_set_mpc(ifp, 1);
if (action == P2P_PAF_GON_CONF) {
brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n");
clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
}
} else if (brcmf_p2p_is_gas_action(frame, mgmt_frame_len)) {
sd_act_frm = (struct brcmf_p2psd_gas_pub_act_frame *)frame;
action = sd_act_frm->action;
}
if (test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) &&
(p2p->next_af_subtype == action)) {
brcmf_dbg(TRACE, "We got a right next frame! (%d)\n", action);
clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME,
&p2p->status);
/* Stop waiting for next AF. */
brcmf_p2p_stop_wait_next_action_frame(cfg);
}
mgmt_frame = kzalloc(offsetof(struct ieee80211_mgmt, u) +
mgmt_frame_len, GFP_KERNEL);
if (!mgmt_frame) {
brcmf_err("No memory available for action frame\n");
return -ENOMEM;
}
memcpy(mgmt_frame->da, ifp->mac_addr, ETH_ALEN);
brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mgmt_frame->bssid,
ETH_ALEN);
memcpy(mgmt_frame->sa, e->addr, ETH_ALEN);
mgmt_frame->frame_control = cpu_to_le16(IEEE80211_STYPE_ACTION);
memcpy(&mgmt_frame->u, frame, mgmt_frame_len);
mgmt_frame_len += offsetof(struct ieee80211_mgmt, u);
freq = ieee80211_channel_to_frequency(ch.chnum,
ch.band == BRCMU_CHAN_BAND_2G ?
IEEE80211_BAND_2GHZ :
IEEE80211_BAND_5GHZ);
wdev = &ifp->vif->wdev;
cfg80211_rx_mgmt(wdev, freq, 0, (u8 *)mgmt_frame, mgmt_frame_len, 0,
GFP_ATOMIC);
kfree(mgmt_frame);
return 0;
}
/**
* brcmf_p2p_notify_action_tx_complete() - transmit action frame complete
*
* @ifp: interfac control.
* @e: event message. Not used, to make it usable for fweh event dispatcher.
* @data: not used.
*
*/
int brcmf_p2p_notify_action_tx_complete(struct brcmf_if *ifp,
const struct brcmf_event_msg *e,
void *data)
{
struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
struct brcmf_p2p_info *p2p = &cfg->p2p;
brcmf_dbg(INFO, "Enter: event %s, status=%d\n",
e->event_code == BRCMF_E_ACTION_FRAME_OFF_CHAN_COMPLETE ?
"ACTION_FRAME_OFF_CHAN_COMPLETE" : "ACTION_FRAME_COMPLETE",
e->status);
if (!test_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status))
return 0;
if (e->event_code == BRCMF_E_ACTION_FRAME_COMPLETE) {
if (e->status == BRCMF_E_STATUS_SUCCESS)
set_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED,
&p2p->status);
else {
set_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
/* If there is no ack, we don't need to wait for
* WLC_E_ACTION_FRAME_OFFCHAN_COMPLETE event
*/
brcmf_p2p_stop_wait_next_action_frame(cfg);
}
} else {
complete(&p2p->send_af_done);
}
return 0;
}
/**
* brcmf_p2p_tx_action_frame() - send action frame over fil.
*
* @p2p: p2p info struct for vif.
* @af_params: action frame data/info.
*
* Send an action frame immediately without doing channel synchronization.
*
* This function waits for a completion event before returning.
* The WLC_E_ACTION_FRAME_COMPLETE event will be received when the action
* frame is transmitted.
*/
static s32 brcmf_p2p_tx_action_frame(struct brcmf_p2p_info *p2p,
struct brcmf_fil_af_params_le *af_params)
{
struct brcmf_cfg80211_vif *vif;
s32 err = 0;
s32 timeout = 0;
brcmf_dbg(TRACE, "Enter\n");
reinit_completion(&p2p->send_af_done);
clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status);
clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
err = brcmf_fil_bsscfg_data_set(vif->ifp, "actframe", af_params,
sizeof(*af_params));
if (err) {
brcmf_err(" sending action frame has failed\n");
goto exit;
}
p2p->af_sent_channel = le32_to_cpu(af_params->channel);
p2p->af_tx_sent_jiffies = jiffies;
timeout = wait_for_completion_timeout(&p2p->send_af_done,
msecs_to_jiffies(P2P_AF_MAX_WAIT_TIME));
if (test_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status)) {
brcmf_dbg(TRACE, "TX action frame operation is success\n");
} else {
err = -EIO;
brcmf_dbg(TRACE, "TX action frame operation has failed\n");
}
/* clear status bit for action tx */
clear_bit(BRCMF_P2P_STATUS_ACTION_TX_COMPLETED, &p2p->status);
clear_bit(BRCMF_P2P_STATUS_ACTION_TX_NOACK, &p2p->status);
exit:
return err;
}
/**
* brcmf_p2p_pub_af_tx() - public action frame tx routine.
*
* @cfg: driver private data for cfg80211 interface.
* @af_params: action frame data/info.
* @config_af_params: configuration data for action frame.
*
* routine which transmits ation frame public type.
*/
static s32 brcmf_p2p_pub_af_tx(struct brcmf_cfg80211_info *cfg,
struct brcmf_fil_af_params_le *af_params,
struct brcmf_config_af_params *config_af_params)
{
struct brcmf_p2p_info *p2p = &cfg->p2p;
struct brcmf_fil_action_frame_le *action_frame;
struct brcmf_p2p_pub_act_frame *act_frm;
s32 err = 0;
u16 ie_len;
action_frame = &af_params->action_frame;
act_frm = (struct brcmf_p2p_pub_act_frame *)(action_frame->data);
config_af_params->extra_listen = true;
switch (act_frm->subtype) {
case P2P_PAF_GON_REQ:
brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status set\n");
set_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
config_af_params->mpc_onoff = 0;
config_af_params->search_channel = true;
p2p->next_af_subtype = act_frm->subtype + 1;
p2p->gon_req_action = true;
/* increase dwell time to wait for RESP frame */
af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
break;
case P2P_PAF_GON_RSP:
p2p->next_af_subtype = act_frm->subtype + 1;
/* increase dwell time to wait for CONF frame */
af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
break;
case P2P_PAF_GON_CONF:
/* If we reached till GO Neg confirmation reset the filter */
brcmf_dbg(TRACE, "P2P: GO_NEG_PHASE status cleared\n");
clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
/* turn on mpc again if go nego is done */
config_af_params->mpc_onoff = 1;
/* minimize dwell time */
af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
config_af_params->extra_listen = false;
break;
case P2P_PAF_INVITE_REQ:
config_af_params->search_channel = true;
p2p->next_af_subtype = act_frm->subtype + 1;
/* increase dwell time */
af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
break;
case P2P_PAF_INVITE_RSP:
/* minimize dwell time */
af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
config_af_params->extra_listen = false;
break;
case P2P_PAF_DEVDIS_REQ:
config_af_params->search_channel = true;
p2p->next_af_subtype = act_frm->subtype + 1;
/* maximize dwell time to wait for RESP frame */
af_params->dwell_time = cpu_to_le32(P2P_AF_LONG_DWELL_TIME);
break;
case P2P_PAF_DEVDIS_RSP:
/* minimize dwell time */
af_params->dwell_time = cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
config_af_params->extra_listen = false;
break;
case P2P_PAF_PROVDIS_REQ:
ie_len = le16_to_cpu(action_frame->len) -
offsetof(struct brcmf_p2p_pub_act_frame, elts);
if (cfg80211_get_p2p_attr(&act_frm->elts[0], ie_len,
IEEE80211_P2P_ATTR_GROUP_ID,
NULL, 0) < 0)
config_af_params->search_channel = true;
config_af_params->mpc_onoff = 0;
p2p->next_af_subtype = act_frm->subtype + 1;
/* increase dwell time to wait for RESP frame */
af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
break;
case P2P_PAF_PROVDIS_RSP:
/* wpa_supplicant send go nego req right after prov disc */
p2p->next_af_subtype = P2P_PAF_GON_REQ;
/* increase dwell time to MED level */
af_params->dwell_time = cpu_to_le32(P2P_AF_MED_DWELL_TIME);
config_af_params->extra_listen = false;
break;
default:
brcmf_err("Unknown p2p pub act frame subtype: %d\n",
act_frm->subtype);
err = -EINVAL;
}
return err;
}
/**
* brcmf_p2p_send_action_frame() - send action frame .
*
* @cfg: driver private data for cfg80211 interface.
* @ndev: net device to transmit on.
* @af_params: configuration data for action frame.
*/
bool brcmf_p2p_send_action_frame(struct brcmf_cfg80211_info *cfg,
struct net_device *ndev,
struct brcmf_fil_af_params_le *af_params)
{
struct brcmf_p2p_info *p2p = &cfg->p2p;
struct brcmf_if *ifp = netdev_priv(ndev);
struct brcmf_fil_action_frame_le *action_frame;
struct brcmf_config_af_params config_af_params;
struct afx_hdl *afx_hdl = &p2p->afx_hdl;
u16 action_frame_len;
bool ack = false;
u8 category;
u8 action;
s32 tx_retry;
s32 extra_listen_time;
uint delta_ms;
action_frame = &af_params->action_frame;
action_frame_len = le16_to_cpu(action_frame->len);
brcmf_p2p_print_actframe(true, action_frame->data, action_frame_len);
/* Add the default dwell time. Dwell time to stay off-channel */
/* to wait for a response action frame after transmitting an */
/* GO Negotiation action frame */
af_params->dwell_time = cpu_to_le32(P2P_AF_DWELL_TIME);
category = action_frame->data[DOT11_ACTION_CAT_OFF];
action = action_frame->data[DOT11_ACTION_ACT_OFF];
/* initialize variables */
p2p->next_af_subtype = P2P_PAF_SUBTYPE_INVALID;
p2p->gon_req_action = false;
/* config parameters */
config_af_params.mpc_onoff = -1;
config_af_params.search_channel = false;
config_af_params.extra_listen = false;
if (brcmf_p2p_is_pub_action(action_frame->data, action_frame_len)) {
/* p2p public action frame process */
if (brcmf_p2p_pub_af_tx(cfg, af_params, &config_af_params)) {
/* Just send unknown subtype frame with */
/* default parameters. */
brcmf_err("P2P Public action frame, unknown subtype.\n");
}
} else if (brcmf_p2p_is_gas_action(action_frame->data,
action_frame_len)) {
/* service discovery process */
if (action == P2PSD_ACTION_ID_GAS_IREQ ||
action == P2PSD_ACTION_ID_GAS_CREQ) {
/* configure service discovery query frame */
config_af_params.search_channel = true;
/* save next af suptype to cancel */
/* remaining dwell time */
p2p->next_af_subtype = action + 1;
af_params->dwell_time =
cpu_to_le32(P2P_AF_MED_DWELL_TIME);
} else if (action == P2PSD_ACTION_ID_GAS_IRESP ||
action == P2PSD_ACTION_ID_GAS_CRESP) {
/* configure service discovery response frame */
af_params->dwell_time =
cpu_to_le32(P2P_AF_MIN_DWELL_TIME);
} else {
brcmf_err("Unknown action type: %d\n", action);
goto exit;
}
} else if (brcmf_p2p_is_p2p_action(action_frame->data,
action_frame_len)) {
/* do not configure anything. it will be */
/* sent with a default configuration */
} else {
brcmf_err("Unknown Frame: category 0x%x, action 0x%x\n",
category, action);
return false;
}
/* if connecting on primary iface, sleep for a while before sending
* af tx for VSDB
*/
if (test_bit(BRCMF_VIF_STATUS_CONNECTING,
&p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->sme_state))
msleep(50);
/* if scan is ongoing, abort current scan. */
if (test_bit(BRCMF_SCAN_STATUS_BUSY, &cfg->scan_status))
brcmf_abort_scanning(cfg);
memcpy(afx_hdl->tx_dst_addr, action_frame->da, ETH_ALEN);
/* To make sure to send successfully action frame, turn off mpc */
if (config_af_params.mpc_onoff == 0)
brcmf_set_mpc(ifp, 0);
/* set status and destination address before sending af */
if (p2p->next_af_subtype != P2P_PAF_SUBTYPE_INVALID) {
/* set status to cancel the remained dwell time in rx process */
set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status);
}
p2p->af_sent_channel = 0;
set_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status);
/* validate channel and p2p ies */
if (config_af_params.search_channel &&
IS_P2P_SOCIAL_CHANNEL(le32_to_cpu(af_params->channel)) &&
p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif->saved_ie.probe_req_ie_len) {
afx_hdl = &p2p->afx_hdl;
afx_hdl->peer_listen_chan = le32_to_cpu(af_params->channel);
if (brcmf_p2p_af_searching_channel(p2p) ==
P2P_INVALID_CHANNEL) {
brcmf_err("Couldn't find peer's channel.\n");
goto exit;
}
/* Abort scan even for VSDB scenarios. Scan gets aborted in
* firmware but after the check of piggyback algorithm. To take
* care of current piggback algo, lets abort the scan here
* itself.
*/
brcmf_notify_escan_complete(cfg, ifp, true, true);
/* update channel */
af_params->channel = cpu_to_le32(afx_hdl->peer_chan);
}
tx_retry = 0;
while (!p2p->block_gon_req_tx &&
(ack == false) && (tx_retry < P2P_AF_TX_MAX_RETRY)) {
ack = !brcmf_p2p_tx_action_frame(p2p, af_params);
tx_retry++;
}
if (ack == false) {
brcmf_err("Failed to send Action Frame(retry %d)\n", tx_retry);
clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
}
exit:
clear_bit(BRCMF_P2P_STATUS_SENDING_ACT_FRAME, &p2p->status);
/* WAR: sometimes dongle does not keep the dwell time of 'actframe'.
* if we coundn't get the next action response frame and dongle does
* not keep the dwell time, go to listen state again to get next action
* response frame.
*/
if (ack && config_af_params.extra_listen && !p2p->block_gon_req_tx &&
test_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status) &&
p2p->af_sent_channel == afx_hdl->my_listen_chan) {
delta_ms = jiffies_to_msecs(jiffies - p2p->af_tx_sent_jiffies);
if (le32_to_cpu(af_params->dwell_time) > delta_ms)
extra_listen_time = le32_to_cpu(af_params->dwell_time) -
delta_ms;
else
extra_listen_time = 0;
if (extra_listen_time > 50) {
set_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
&p2p->status);
brcmf_dbg(INFO, "Wait more time! actual af time:%d, calculated extra listen:%d\n",
le32_to_cpu(af_params->dwell_time),
extra_listen_time);
extra_listen_time += 100;
if (!brcmf_p2p_discover_listen(p2p,
p2p->af_sent_channel,
extra_listen_time)) {
unsigned long duration;
extra_listen_time += 100;
duration = msecs_to_jiffies(extra_listen_time);
wait_for_completion_timeout(&p2p->wait_next_af,
duration);
}
clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_AF_LISTEN,
&p2p->status);
}
}
if (p2p->block_gon_req_tx) {
/* if ack is true, supplicant will wait more time(100ms).
* so we will return it as a success to get more time .
*/
p2p->block_gon_req_tx = false;
ack = true;
}
clear_bit(BRCMF_P2P_STATUS_WAITING_NEXT_ACT_FRAME, &p2p->status);
/* if all done, turn mpc on again */
if (config_af_params.mpc_onoff == 1)
brcmf_set_mpc(ifp, 1);
return ack;
}
/**
* brcmf_p2p_notify_rx_mgmt_p2p_probereq() - Event handler for p2p probe req.
*
* @ifp: interface pointer for which event was received.
* @e: even message.
* @data: payload of event message (probe request).
*/
s32 brcmf_p2p_notify_rx_mgmt_p2p_probereq(struct brcmf_if *ifp,
const struct brcmf_event_msg *e,
void *data)
{
struct brcmf_cfg80211_info *cfg = ifp->drvr->config;
struct brcmf_p2p_info *p2p = &cfg->p2p;
struct afx_hdl *afx_hdl = &p2p->afx_hdl;
struct brcmf_cfg80211_vif *vif = ifp->vif;
struct brcmf_rx_mgmt_data *rxframe = (struct brcmf_rx_mgmt_data *)data;
u16 chanspec = be16_to_cpu(rxframe->chanspec);
struct brcmu_chan ch;
u8 *mgmt_frame;
u32 mgmt_frame_len;
s32 freq;
u16 mgmt_type;
brcmf_dbg(INFO, "Enter: event %d reason %d\n", e->event_code,
e->reason);
ch.chspec = be16_to_cpu(rxframe->chanspec);
cfg->d11inf.decchspec(&ch);
if (test_bit(BRCMF_P2P_STATUS_FINDING_COMMON_CHANNEL, &p2p->status) &&
(memcmp(afx_hdl->tx_dst_addr, e->addr, ETH_ALEN) == 0)) {
afx_hdl->peer_chan = ch.chnum;
brcmf_dbg(INFO, "PROBE REQUEST: Peer found, channel=%d\n",
afx_hdl->peer_chan);
complete(&afx_hdl->act_frm_scan);
}
/* Firmware sends us two proberesponses for each idx one. At the */
/* moment anything but bsscfgidx 0 is passed up to supplicant */
if (e->bsscfgidx == 0)
return 0;
/* Filter any P2P probe reqs arriving during the GO-NEG Phase */
if (test_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status)) {
brcmf_dbg(INFO, "Filtering P2P probe_req in GO-NEG phase\n");
return 0;
}
/* Check if wpa_supplicant has registered for this frame */
brcmf_dbg(INFO, "vif->mgmt_rx_reg %04x\n", vif->mgmt_rx_reg);
mgmt_type = (IEEE80211_STYPE_PROBE_REQ & IEEE80211_FCTL_STYPE) >> 4;
if ((vif->mgmt_rx_reg & BIT(mgmt_type)) == 0)
return 0;
mgmt_frame = (u8 *)(rxframe + 1);
mgmt_frame_len = e->datalen - sizeof(*rxframe);
freq = ieee80211_channel_to_frequency(ch.chnum,
ch.band == BRCMU_CHAN_BAND_2G ?
IEEE80211_BAND_2GHZ :
IEEE80211_BAND_5GHZ);
cfg80211_rx_mgmt(&vif->wdev, freq, 0, mgmt_frame, mgmt_frame_len, 0,
GFP_ATOMIC);
brcmf_dbg(INFO, "mgmt_frame_len (%d) , e->datalen (%d), chanspec (%04x), freq (%d)\n",
mgmt_frame_len, e->datalen, chanspec, freq);
return 0;
}
/**
* brcmf_p2p_attach() - attach for P2P.
*
* @cfg: driver private data for cfg80211 interface.
*/
s32 brcmf_p2p_attach(struct brcmf_cfg80211_info *cfg)
{
struct brcmf_if *pri_ifp;
struct brcmf_if *p2p_ifp;
struct brcmf_cfg80211_vif *p2p_vif;
struct brcmf_p2p_info *p2p;
struct brcmf_pub *drvr;
s32 bssidx;
s32 err = 0;
p2p = &cfg->p2p;
p2p->cfg = cfg;
drvr = cfg->pub;
pri_ifp = drvr->iflist[0];
p2p_ifp = drvr->iflist[1];
p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif = pri_ifp->vif;
if (p2p_ifp) {
p2p_vif = brcmf_alloc_vif(cfg, NL80211_IFTYPE_P2P_DEVICE,
false);
if (IS_ERR(p2p_vif)) {
brcmf_err("could not create discovery vif\n");
err = -ENOMEM;
goto exit;
}
p2p_vif->ifp = p2p_ifp;
p2p_ifp->vif = p2p_vif;
p2p_vif->wdev.netdev = p2p_ifp->ndev;
p2p_ifp->ndev->ieee80211_ptr = &p2p_vif->wdev;
SET_NETDEV_DEV(p2p_ifp->ndev, wiphy_dev(cfg->wiphy));
p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif = p2p_vif;
brcmf_p2p_generate_bss_mac(p2p, NULL);
memcpy(p2p_ifp->mac_addr, p2p->dev_addr, ETH_ALEN);
brcmf_p2p_set_firmware(pri_ifp, p2p->dev_addr);
/* Initialize P2P Discovery in the firmware */
err = brcmf_fil_iovar_int_set(pri_ifp, "p2p_disc", 1);
if (err < 0) {
brcmf_err("set p2p_disc error\n");
brcmf_free_vif(cfg, p2p_vif);
goto exit;
}
/* obtain bsscfg index for P2P discovery */
err = brcmf_fil_iovar_int_get(pri_ifp, "p2p_dev", &bssidx);
if (err < 0) {
brcmf_err("retrieving discover bsscfg index failed\n");
brcmf_free_vif(cfg, p2p_vif);
goto exit;
}
/* Verify that firmware uses same bssidx as driver !! */
if (p2p_ifp->bssidx != bssidx) {
brcmf_err("Incorrect bssidx=%d, compared to p2p_ifp->bssidx=%d\n",
bssidx, p2p_ifp->bssidx);
brcmf_free_vif(cfg, p2p_vif);
goto exit;
}
init_completion(&p2p->send_af_done);
INIT_WORK(&p2p->afx_hdl.afx_work, brcmf_p2p_afx_handler);
init_completion(&p2p->afx_hdl.act_frm_scan);
init_completion(&p2p->wait_next_af);
}
exit:
return err;
}
/**
* brcmf_p2p_detach() - detach P2P.
*
* @p2p: P2P specific data.
*/
void brcmf_p2p_detach(struct brcmf_p2p_info *p2p)
{
struct brcmf_cfg80211_vif *vif;
vif = p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif;
if (vif != NULL) {
brcmf_p2p_cancel_remain_on_channel(vif->ifp);
brcmf_p2p_deinit_discovery(p2p);
/* remove discovery interface */
brcmf_free_vif(p2p->cfg, vif);
p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif = NULL;
}
/* just set it all to zero */
memset(p2p, 0, sizeof(*p2p));
}
/**
* brcmf_p2p_get_current_chanspec() - Get current operation channel.
*
* @p2p: P2P specific data.
* @chanspec: chanspec to be returned.
*/
static void brcmf_p2p_get_current_chanspec(struct brcmf_p2p_info *p2p,
u16 *chanspec)
{
struct brcmf_if *ifp;
u8 mac_addr[ETH_ALEN];
struct brcmu_chan ch;
struct brcmf_bss_info_le *bi;
u8 *buf;
ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSSID, mac_addr,
ETH_ALEN) == 0) {
buf = kzalloc(WL_BSS_INFO_MAX, GFP_KERNEL);
if (buf != NULL) {
*(__le32 *)buf = cpu_to_le32(WL_BSS_INFO_MAX);
if (brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSS_INFO,
buf, WL_BSS_INFO_MAX) == 0) {
bi = (struct brcmf_bss_info_le *)(buf + 4);
*chanspec = le16_to_cpu(bi->chanspec);
kfree(buf);
return;
}
kfree(buf);
}
}
/* Use default channel for P2P */
ch.chnum = BRCMF_P2P_TEMP_CHAN;
ch.bw = BRCMU_CHAN_BW_20;
p2p->cfg->d11inf.encchspec(&ch);
*chanspec = ch.chspec;
}
/**
* Change a P2P Role.
* Parameters:
* @mac: MAC address of the BSS to change a role
* Returns 0 if success.
*/
int brcmf_p2p_ifchange(struct brcmf_cfg80211_info *cfg,
enum brcmf_fil_p2p_if_types if_type)
{
struct brcmf_p2p_info *p2p = &cfg->p2p;
struct brcmf_cfg80211_vif *vif;
struct brcmf_fil_p2p_if_le if_request;
s32 err;
u16 chanspec;
brcmf_dbg(TRACE, "Enter\n");
vif = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
if (!vif) {
brcmf_err("vif for P2PAPI_BSSCFG_PRIMARY does not exist\n");
return -EPERM;
}
brcmf_notify_escan_complete(cfg, vif->ifp, true, true);
vif = p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif;
if (!vif) {
brcmf_err("vif for P2PAPI_BSSCFG_CONNECTION does not exist\n");
return -EPERM;
}
brcmf_set_mpc(vif->ifp, 0);
/* In concurrency case, STA may be already associated in a particular */
/* channel. so retrieve the current channel of primary interface and */
/* then start the virtual interface on that. */
brcmf_p2p_get_current_chanspec(p2p, &chanspec);
if_request.type = cpu_to_le16((u16)if_type);
if_request.chspec = cpu_to_le16(chanspec);
memcpy(if_request.addr, p2p->int_addr, sizeof(if_request.addr));
brcmf_cfg80211_arm_vif_event(cfg, vif);
err = brcmf_fil_iovar_data_set(vif->ifp, "p2p_ifupd", &if_request,
sizeof(if_request));
if (err) {
brcmf_err("p2p_ifupd FAILED, err=%d\n", err);
brcmf_cfg80211_arm_vif_event(cfg, NULL);
return err;
}
err = brcmf_cfg80211_wait_vif_event_timeout(cfg, BRCMF_E_IF_CHANGE,
msecs_to_jiffies(1500));
brcmf_cfg80211_arm_vif_event(cfg, NULL);
if (!err) {
brcmf_err("No BRCMF_E_IF_CHANGE event received\n");
return -EIO;
}
err = brcmf_fil_cmd_int_set(vif->ifp, BRCMF_C_SET_SCB_TIMEOUT,
BRCMF_SCB_TIMEOUT_VALUE);
return err;
}
static int brcmf_p2p_request_p2p_if(struct brcmf_p2p_info *p2p,
struct brcmf_if *ifp, u8 ea[ETH_ALEN],
enum brcmf_fil_p2p_if_types iftype)
{
struct brcmf_fil_p2p_if_le if_request;
int err;
u16 chanspec;
/* we need a default channel */
brcmf_p2p_get_current_chanspec(p2p, &chanspec);
/* fill the firmware request */
memcpy(if_request.addr, ea, ETH_ALEN);
if_request.type = cpu_to_le16((u16)iftype);
if_request.chspec = cpu_to_le16(chanspec);
err = brcmf_fil_iovar_data_set(ifp, "p2p_ifadd", &if_request,
sizeof(if_request));
if (err)
return err;
return err;
}
static int brcmf_p2p_disable_p2p_if(struct brcmf_cfg80211_vif *vif)
{
struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev);
struct net_device *pri_ndev = cfg_to_ndev(cfg);
struct brcmf_if *ifp = netdev_priv(pri_ndev);
u8 *addr = vif->wdev.netdev->dev_addr;
return brcmf_fil_iovar_data_set(ifp, "p2p_ifdis", addr, ETH_ALEN);
}
static int brcmf_p2p_release_p2p_if(struct brcmf_cfg80211_vif *vif)
{
struct brcmf_cfg80211_info *cfg = wdev_to_cfg(&vif->wdev);
struct net_device *pri_ndev = cfg_to_ndev(cfg);
struct brcmf_if *ifp = netdev_priv(pri_ndev);
u8 *addr = vif->wdev.netdev->dev_addr;
return brcmf_fil_iovar_data_set(ifp, "p2p_ifdel", addr, ETH_ALEN);
}
/**
* brcmf_p2p_create_p2pdev() - create a P2P_DEVICE virtual interface.
*
* @p2p: P2P specific data.
* @wiphy: wiphy device of new interface.
* @addr: mac address for this new interface.
*/
static struct wireless_dev *brcmf_p2p_create_p2pdev(struct brcmf_p2p_info *p2p,
struct wiphy *wiphy,
u8 *addr)
{
struct brcmf_cfg80211_vif *p2p_vif;
struct brcmf_if *p2p_ifp;
struct brcmf_if *pri_ifp;
int err;
u32 bssidx;
if (p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif)
return ERR_PTR(-ENOSPC);
p2p_vif = brcmf_alloc_vif(p2p->cfg, NL80211_IFTYPE_P2P_DEVICE,
false);
if (IS_ERR(p2p_vif)) {
brcmf_err("could not create discovery vif\n");
return (struct wireless_dev *)p2p_vif;
}
pri_ifp = p2p->bss_idx[P2PAPI_BSSCFG_PRIMARY].vif->ifp;
brcmf_p2p_generate_bss_mac(p2p, addr);
brcmf_p2p_set_firmware(pri_ifp, p2p->dev_addr);
brcmf_cfg80211_arm_vif_event(p2p->cfg, p2p_vif);
/* Initialize P2P Discovery in the firmware */
err = brcmf_fil_iovar_int_set(pri_ifp, "p2p_disc", 1);
if (err < 0) {
brcmf_err("set p2p_disc error\n");
brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL);
goto fail;
}
/* wait for firmware event */
err = brcmf_cfg80211_wait_vif_event_timeout(p2p->cfg, BRCMF_E_IF_ADD,
msecs_to_jiffies(1500));
brcmf_cfg80211_arm_vif_event(p2p->cfg, NULL);
if (!err) {
brcmf_err("timeout occurred\n");
err = -EIO;
goto fail;
}
/* discovery interface created */
p2p_ifp = p2p_vif->ifp;
p2p->bss_idx[P2PAPI_BSSCFG_DEVICE].vif = p2p_vif;
memcpy(p2p_ifp->mac_addr, p2p->dev_addr, ETH_ALEN);
memcpy(&p2p_vif->wdev.address, p2p->dev_addr, sizeof(p2p->dev_addr));
/* verify bsscfg index for P2P discovery */
err = brcmf_fil_iovar_int_get(pri_ifp, "p2p_dev", &bssidx);
if (err < 0) {
brcmf_err("retrieving discover bsscfg index failed\n");
goto fail;
}
WARN_ON(p2p_ifp->bssidx != bssidx);
init_completion(&p2p->send_af_done);
INIT_WORK(&p2p->afx_hdl.afx_work, brcmf_p2p_afx_handler);
init_completion(&p2p->afx_hdl.act_frm_scan);
init_completion(&p2p->wait_next_af);
return &p2p_vif->wdev;
fail:
brcmf_free_vif(p2p->cfg, p2p_vif);
return ERR_PTR(err);
}
/**
* brcmf_p2p_delete_p2pdev() - delete P2P_DEVICE virtual interface.
*
* @vif: virtual interface object to delete.
*/
static void brcmf_p2p_delete_p2pdev(struct brcmf_cfg80211_info *cfg,
struct brcmf_cfg80211_vif *vif)
{
cfg80211_unregister_wdev(&vif->wdev);
cfg->p2p.bss_idx[P2PAPI_BSSCFG_DEVICE].vif = NULL;
brcmf_free_vif(cfg, vif);
}
/**
* brcmf_p2p_free_p2p_if() - free up net device related data.
*
* @ndev: net device that needs to be freed.
*/
static void brcmf_p2p_free_p2p_if(struct net_device *ndev)
{
struct brcmf_cfg80211_info *cfg;
struct brcmf_cfg80211_vif *vif;
struct brcmf_if *ifp;
ifp = netdev_priv(ndev);
cfg = ifp->drvr->config;
vif = ifp->vif;
brcmf_free_vif(cfg, vif);
free_netdev(ifp->ndev);
}
/**
* brcmf_p2p_add_vif() - create a new P2P virtual interface.
*
* @wiphy: wiphy device of new interface.
* @name: name of the new interface.
* @type: nl80211 interface type.
* @flags: not used.
* @params: contains mac address for P2P device.
*/
struct wireless_dev *brcmf_p2p_add_vif(struct wiphy *wiphy, const char *name,
enum nl80211_iftype type, u32 *flags,
struct vif_params *params)
{
struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
struct brcmf_if *ifp = netdev_priv(cfg_to_ndev(cfg));
struct brcmf_cfg80211_vif *vif;
enum brcmf_fil_p2p_if_types iftype;
enum wl_mode mode;
int err;
if (brcmf_cfg80211_vif_event_armed(cfg))
return ERR_PTR(-EBUSY);
brcmf_dbg(INFO, "adding vif \"%s\" (type=%d)\n", name, type);
switch (type) {
case NL80211_IFTYPE_P2P_CLIENT:
iftype = BRCMF_FIL_P2P_IF_CLIENT;
mode = WL_MODE_BSS;
break;
case NL80211_IFTYPE_P2P_GO:
iftype = BRCMF_FIL_P2P_IF_GO;
mode = WL_MODE_AP;
break;
case NL80211_IFTYPE_P2P_DEVICE:
return brcmf_p2p_create_p2pdev(&cfg->p2p, wiphy,
params->macaddr);
default:
return ERR_PTR(-EOPNOTSUPP);
}
vif = brcmf_alloc_vif(cfg, type, false);
if (IS_ERR(vif))
return (struct wireless_dev *)vif;
brcmf_cfg80211_arm_vif_event(cfg, vif);
err = brcmf_p2p_request_p2p_if(&cfg->p2p, ifp, cfg->p2p.int_addr,
iftype);
if (err) {
brcmf_cfg80211_arm_vif_event(cfg, NULL);
goto fail;
}
/* wait for firmware event */
err = brcmf_cfg80211_wait_vif_event_timeout(cfg, BRCMF_E_IF_ADD,
msecs_to_jiffies(1500));
brcmf_cfg80211_arm_vif_event(cfg, NULL);
if (!err) {
brcmf_err("timeout occurred\n");
err = -EIO;
goto fail;
}
/* interface created in firmware */
ifp = vif->ifp;
if (!ifp) {
brcmf_err("no if pointer provided\n");
err = -ENOENT;
goto fail;
}
strncpy(ifp->ndev->name, name, sizeof(ifp->ndev->name) - 1);
err = brcmf_net_attach(ifp, true);
if (err) {
brcmf_err("Registering netdevice failed\n");
goto fail;
}
/* override destructor */
ifp->ndev->destructor = brcmf_p2p_free_p2p_if;
cfg->p2p.bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = vif;
/* Disable firmware roaming for P2P interface */
brcmf_fil_iovar_int_set(ifp, "roam_off", 1);
if (iftype == BRCMF_FIL_P2P_IF_GO) {
/* set station timeout for p2p */
brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_SCB_TIMEOUT,
BRCMF_SCB_TIMEOUT_VALUE);
}
return &ifp->vif->wdev;
fail:
brcmf_free_vif(cfg, vif);
return ERR_PTR(err);
}
/**
* brcmf_p2p_del_vif() - delete a P2P virtual interface.
*
* @wiphy: wiphy device of interface.
* @wdev: wireless device of interface.
*
* TODO: not yet supported.
*/
int brcmf_p2p_del_vif(struct wiphy *wiphy, struct wireless_dev *wdev)
{
struct brcmf_cfg80211_info *cfg = wiphy_priv(wiphy);
struct brcmf_p2p_info *p2p = &cfg->p2p;
struct brcmf_cfg80211_vif *vif;
unsigned long jiffie_timeout = msecs_to_jiffies(1500);
bool wait_for_disable = false;
int err;
brcmf_dbg(TRACE, "delete P2P vif\n");
vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
switch (vif->wdev.iftype) {
case NL80211_IFTYPE_P2P_CLIENT:
if (test_bit(BRCMF_VIF_STATUS_DISCONNECTING, &vif->sme_state))
wait_for_disable = true;
break;
case NL80211_IFTYPE_P2P_GO:
if (!brcmf_p2p_disable_p2p_if(vif))
wait_for_disable = true;
break;
case NL80211_IFTYPE_P2P_DEVICE:
brcmf_p2p_delete_p2pdev(cfg, vif);
return 0;
default:
return -ENOTSUPP;
break;
}
clear_bit(BRCMF_P2P_STATUS_GO_NEG_PHASE, &p2p->status);
brcmf_dbg(INFO, "P2P: GO_NEG_PHASE status cleared\n");
if (wait_for_disable)
wait_for_completion_timeout(&cfg->vif_disabled,
msecs_to_jiffies(500));
brcmf_vif_clear_mgmt_ies(vif);
brcmf_cfg80211_arm_vif_event(cfg, vif);
err = brcmf_p2p_release_p2p_if(vif);
if (!err) {
/* wait for firmware event */
err = brcmf_cfg80211_wait_vif_event_timeout(cfg, BRCMF_E_IF_DEL,
jiffie_timeout);
if (!err)
err = -EIO;
else
err = 0;
}
brcmf_cfg80211_arm_vif_event(cfg, NULL);
p2p->bss_idx[P2PAPI_BSSCFG_CONNECTION].vif = NULL;
return err;
}
int brcmf_p2p_start_device(struct wiphy *wiphy, struct wireless_dev *wdev)
{
struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
struct brcmf_p2p_info *p2p = &cfg->p2p;
struct brcmf_cfg80211_vif *vif;
int err;
vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
mutex_lock(&cfg->usr_sync);
err = brcmf_p2p_enable_discovery(p2p);
if (!err)
set_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state);
mutex_unlock(&cfg->usr_sync);
return err;
}
void brcmf_p2p_stop_device(struct wiphy *wiphy, struct wireless_dev *wdev)
{
struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
struct brcmf_p2p_info *p2p = &cfg->p2p;
struct brcmf_cfg80211_vif *vif;
vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
mutex_lock(&cfg->usr_sync);
(void)brcmf_p2p_deinit_discovery(p2p);
brcmf_abort_scanning(cfg);
clear_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state);
mutex_unlock(&cfg->usr_sync);
}
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