diff options
Diffstat (limited to 'drivers/staging/csr/unifi_event.c')
| -rw-r--r-- | drivers/staging/csr/unifi_event.c | 700 |
1 files changed, 700 insertions, 0 deletions
diff --git a/drivers/staging/csr/unifi_event.c b/drivers/staging/csr/unifi_event.c new file mode 100644 index 000000000000..c27b23daf399 --- /dev/null +++ b/drivers/staging/csr/unifi_event.c @@ -0,0 +1,700 @@ +/* + * *************************************************************************** + * FILE: unifi_event.c + * + * PURPOSE: + * Process the signals received by UniFi. + * It is part of the porting exercise. + * + * Copyright (C) 2009 by Cambridge Silicon Radio Ltd. + * + * Refer to LICENSE.txt included with this source code for details on + * the license terms. + * + * *************************************************************************** + */ + + +/* + * Porting notes: + * The implementation of unifi_receive_event() in Linux is fairly complicated. + * The linux driver support multiple userspace applications and several + * build configurations, so the received signals are processed by different + * processes and multiple times. + * In a simple implementation, this function needs to deliver: + * - The MLME-UNITDATA.ind signals to the Rx data plane and to the Traffic + * Analysis using unifi_ta_sample(). + * - The MLME-UNITDATA-STATUS.ind signals to the Tx data plane. + * - All the other signals to the SME using unifi_sys_hip_ind(). + */ + +#include "csr_wifi_hip_unifi.h" +#include "csr_wifi_hip_conversions.h" +#include "unifi_priv.h" + + +/* + * --------------------------------------------------------------------------- + * send_to_client + * + * Helper for unifi_receive_event. + * + * This function forwards a signal to one client. + * + * Arguments: + * priv Pointer to driver's private data. + * client Pointer to the client structure. + * receiver_id The reciever id of the signal. + * sigdata Pointer to the packed signal buffer. + * siglen Length of the packed signal. + * bulkdata Pointer to the signal's bulk data. + * + * Returns: + * None. + * + * --------------------------------------------------------------------------- + */ +static void send_to_client(unifi_priv_t *priv, ul_client_t *client, + int receiver_id, + unsigned char *sigdata, int siglen, + const bulk_data_param_t *bulkdata) +{ + if (client && client->event_hook) { + /*unifi_trace(priv, UDBG3, + "Receive: client %d, (s:0x%X, r:0x%X) - Signal 0x%.4X \n", + client->client_id, client->sender_id, receiver_id, + CSR_GET_UINT16_FROM_LITTLE_ENDIAN(sigdata));*/ + + client->event_hook(client, sigdata, siglen, bulkdata, UDI_TO_HOST); + } +} + +/* + * --------------------------------------------------------------------------- + * process_pkt_data_ind + * + * Dispatcher for received signals. + * + * This function receives the 'to host' signals and forwards + * them to the unifi linux clients. + * + * Arguments: + * priv Context + * sigdata Pointer to the packed signal buffer(Its in form of MA-PACKET.ind). + * bulkdata Pointer to signal's bulkdata + * freeBulkData Pointer to a flag which gets set if the bulkdata needs to + * be freed after calling the logging handlers. If it is not + * set the bulkdata must be freed by the MLME handler or + * passed to the network stack. + * Returns: + * TRUE if the packet should be routed to the SME etc. + * FALSE if the packet is for the driver or network stack + * --------------------------------------------------------------------------- + */ +static u8 check_routing_pkt_data_ind(unifi_priv_t *priv, + u8 *sigdata, + const bulk_data_param_t* bulkdata, + u8 *freeBulkData, + netInterface_priv_t *interfacePriv) +{ + u16 frmCtrl, receptionStatus, frmCtrlSubType; + u8 *macHdrLocation; + u8 interfaceTag; + u8 isDataFrame; + u8 isProtocolVerInvalid = FALSE; + u8 isDataFrameSubTypeNoData = FALSE; + +#ifdef CSR_WIFI_SECURITY_WAPI_ENABLE + static const u8 wapiProtocolIdSNAPHeader[] = {0x88,0xb4}; + static const u8 wapiProtocolIdSNAPHeaderOffset = 6; + u8 *destAddr; + u8 *srcAddr; + u8 isWapiUnicastPkt = FALSE; + +#ifdef CSR_WIFI_SECURITY_WAPI_QOSCTRL_MIC_WORKAROUND + u16 qosControl; +#endif + + u8 llcSnapHeaderOffset = 0; + + destAddr = (u8 *) bulkdata->d[0].os_data_ptr + MAC_HEADER_ADDR1_OFFSET; + srcAddr = (u8 *) bulkdata->d[0].os_data_ptr + MAC_HEADER_ADDR2_OFFSET; + + /*Individual/Group bit - Bit 0 of first byte*/ + isWapiUnicastPkt = (!(destAddr[0] & 0x01)) ? TRUE : FALSE; +#endif + +#define CSR_WIFI_MA_PKT_IND_RECEPTION_STATUS_OFFSET sizeof(CSR_SIGNAL_PRIMITIVE_HEADER) + 22 + + *freeBulkData = FALSE; + + /* Fetch the MAC header location from MA_PKT_IND packet */ + macHdrLocation = (u8 *) bulkdata->d[0].os_data_ptr; + /* Fetch the Frame Control value from MAC header */ + frmCtrl = CSR_GET_UINT16_FROM_LITTLE_ENDIAN(macHdrLocation); + + /* Pull out interface tag from virtual interface identifier */ + interfaceTag = (CSR_GET_UINT16_FROM_LITTLE_ENDIAN(sigdata + 14)) & 0xff; + + /* check for MIC failure before processing the signal */ + receptionStatus = CSR_GET_UINT16_FROM_LITTLE_ENDIAN(sigdata + CSR_WIFI_MA_PKT_IND_RECEPTION_STATUS_OFFSET); + + /* To discard any spurious MIC failures that could be reported by the firmware */ + isDataFrame = ((frmCtrl & IEEE80211_FC_TYPE_MASK) == (IEEE802_11_FC_TYPE_DATA & IEEE80211_FC_TYPE_MASK)) ? TRUE : FALSE; + /* 0x00 is the only valid protocol version*/ + isProtocolVerInvalid = (frmCtrl & IEEE80211_FC_PROTO_VERSION_MASK) ? TRUE : FALSE; + frmCtrlSubType = (frmCtrl & IEEE80211_FC_SUBTYPE_MASK) >> FRAME_CONTROL_SUBTYPE_FIELD_OFFSET; + /*Exclude the no data & reserved sub-types from MIC failure processing*/ + isDataFrameSubTypeNoData = (((frmCtrlSubType>0x03)&&(frmCtrlSubType<0x08)) || (frmCtrlSubType>0x0B)) ? TRUE : FALSE; + if ((receptionStatus == CSR_MICHAEL_MIC_ERROR) && + ((!isDataFrame) || isProtocolVerInvalid || (isDataFrame && isDataFrameSubTypeNoData))) { + /* Currently MIC errors are discarded for frames other than data frames. This might need changing when we start + * supporting 802.11w (Protected Management frames) + */ + *freeBulkData = TRUE; + unifi_trace(priv, UDBG4, "Discarding this frame and ignoring the MIC failure as this is a garbage/non-data/no data frame\n"); + return FALSE; + } + +#ifdef CSR_WIFI_SECURITY_WAPI_ENABLE + + if (receptionStatus == CSR_MICHAEL_MIC_ERROR) { + + if (interfacePriv->interfaceMode == CSR_WIFI_ROUTER_CTRL_MODE_STA) { + +#ifdef CSR_WIFI_SECURITY_WAPI_QOSCTRL_MIC_WORKAROUND + if ((isDataFrame) && + ((IEEE802_11_FC_TYPE_QOS_DATA & IEEE80211_FC_SUBTYPE_MASK) == (frmCtrl & IEEE80211_FC_SUBTYPE_MASK)) && + (priv->isWapiConnection)) + { + qosControl = CSR_GET_UINT16_FROM_LITTLE_ENDIAN(macHdrLocation + (((frmCtrl & IEEE802_11_FC_TO_DS_MASK) && (frmCtrl & IEEE802_11_FC_FROM_DS_MASK)) ? 30 : 24) ); + + unifi_trace(priv, UDBG4, "check_routing_pkt_data_ind() :: Value of the QoS control field - 0x%04x \n", qosControl); + + if (qosControl & IEEE802_11_QC_NON_TID_BITS_MASK) + { + unifi_trace(priv, UDBG4, "Ignore the MIC failure and pass the MPDU to the stack when any of bits [4-15] is set in the QoS control field\n"); + + /*Exclude the MIC [16] and the PN [16] that are appended by the firmware*/ + ((bulk_data_param_t*)bulkdata)->d[0].data_length = bulkdata->d[0].data_length - 32; + + /*Clear the reception status of the signal (CSR_RX_SUCCESS)*/ + *(sigdata + CSR_WIFI_MA_PKT_IND_RECEPTION_STATUS_OFFSET) = 0x00; + *(sigdata + CSR_WIFI_MA_PKT_IND_RECEPTION_STATUS_OFFSET+1) = 0x00; + + *freeBulkData = FALSE; + + return FALSE; + } + } +#endif + /* If this MIC ERROR reported by the firmware is either for + * [1] a WAPI Multicast MPDU and the Multicast filter has NOT been set (It is set only when group key index (MSKID) = 1 in Group Rekeying) OR + * [2] a WAPI Unicast MPDU and either the CONTROL PORT is open or the WAPI Unicast filter or filter(s) is NOT set + * then report a MIC FAILURE indication to the SME. + */ +#ifndef CSR_WIFI_SECURITY_WAPI_SW_ENCRYPTION + if ((priv->wapi_multicast_filter == 0) || isWapiUnicastPkt) { +#else + /*When SW encryption is enabled and USKID=1 (wapi_unicast_filter = 1), we are expected + *to receive MIC failure INDs for unicast MPDUs*/ + if ( ((priv->wapi_multicast_filter == 0) && !isWapiUnicastPkt) || + ((priv->wapi_unicast_filter == 0) && isWapiUnicastPkt) ) { +#endif + /*Discard the frame*/ + *freeBulkData = TRUE; + unifi_trace(priv, UDBG4, "Discarding the contents of the frame with MIC failure \n"); + + if (isWapiUnicastPkt && + ((uf_sme_port_state(priv,srcAddr,UF_CONTROLLED_PORT_Q,interfaceTag) != CSR_WIFI_ROUTER_CTRL_PORT_ACTION_8021X_PORT_OPEN)|| +#ifndef CSR_WIFI_SECURITY_WAPI_SW_ENCRYPTION + (priv->wapi_unicast_filter) || +#endif + (priv->wapi_unicast_queued_pkt_filter))) { + + /* Workaround to handle MIC failures reported by the firmware for encrypted packets from the AP + * while we are in the process of re-association induced by unsupported WAPI Unicast key index + * - Discard the packets with MIC failures "until" we have + * a. negotiated a key, + * b. opened the CONTROL PORT and + * c. the AP has started using the new key + */ + unifi_trace(priv, UDBG4, "Ignoring the MIC failure as either a. CONTROL PORT isn't OPEN or b. Unicast filter is set or c. WAPI AP using old key for buffered pkts\n"); + + /*Ignore this MIC failure*/ + return FALSE; + + }/*WAPI re-key specific workaround*/ + + unifi_trace(priv, UDBG6, "check_routing_pkt_data_ind - MIC FAILURE : interfaceTag %x Src Addr %x:%x:%x:%x:%x:%x\n", + interfaceTag, srcAddr[0], srcAddr[1], srcAddr[2], srcAddr[3], srcAddr[4], srcAddr[5]); + unifi_trace(priv, UDBG6, "check_routing_pkt_data_ind - MIC FAILURE : Dest Addr %x:%x:%x:%x:%x:%x\n", + destAddr[0], destAddr[1], destAddr[2], destAddr[3], destAddr[4], destAddr[5]); + unifi_trace(priv, UDBG6, "check_routing_pkt_data_ind - MIC FAILURE : Control Port State - 0x%.4X \n", + uf_sme_port_state(priv,srcAddr,UF_CONTROLLED_PORT_Q,interfaceTag)); + + unifi_error(priv, "MIC failure in %s\n", __FUNCTION__); + + /*Report the MIC failure to the SME*/ + return TRUE; + } + }/* STA mode */ + else { + /* Its AP Mode . Just Return */ + *freeBulkData = TRUE; + unifi_error(priv, "MIC failure in %s\n", __FUNCTION__); + return TRUE; + } /* AP mode */ + }/* MIC error */ +#else + if (receptionStatus == CSR_MICHAEL_MIC_ERROR) { + *freeBulkData = TRUE; + unifi_error(priv, "MIC failure in %s\n", __FUNCTION__); + return TRUE; + } +#endif /*CSR_WIFI_SECURITY_WAPI_ENABLE*/ + + unifi_trace(priv, UDBG4, "frmCtrl = 0x%04x %s\n", + frmCtrl, + (((frmCtrl & 0x000c)>>FRAME_CONTROL_TYPE_FIELD_OFFSET) == IEEE802_11_FRAMETYPE_MANAGEMENT) ? + "Mgt" : "Ctrl/Data"); + +#ifdef CSR_WIFI_SECURITY_WAPI_ENABLE + /* To ignore MIC failures reported due to the WAPI AP using the old key for queued packets before + * starting to use the new key negotiated as part of unicast re-keying + */ + if ((interfacePriv->interfaceMode == CSR_WIFI_ROUTER_CTRL_MODE_STA)&& + isWapiUnicastPkt && + (receptionStatus == CSR_RX_SUCCESS) && + (priv->wapi_unicast_queued_pkt_filter==1)) { + + unifi_trace(priv, UDBG6, "check_routing_pkt_data_ind(): WAPI unicast pkt received when the (wapi_unicast_queued_pkt_filter) is set\n"); + + if (isDataFrame) { + switch(frmCtrl & IEEE80211_FC_SUBTYPE_MASK) { + case IEEE802_11_FC_TYPE_QOS_DATA & IEEE80211_FC_SUBTYPE_MASK: + llcSnapHeaderOffset = MAC_HEADER_SIZE + 2; + break; + case IEEE802_11_FC_TYPE_QOS_NULL & IEEE80211_FC_SUBTYPE_MASK: + case IEEE802_11_FC_TYPE_NULL & IEEE80211_FC_SUBTYPE_MASK: + break; + default: + llcSnapHeaderOffset = MAC_HEADER_SIZE; + } + } + + if (llcSnapHeaderOffset > 0) { + /* QoS data or Data */ + unifi_trace(priv, UDBG6, "check_routing_pkt_data_ind(): SNAP header found & its offset %d\n",llcSnapHeaderOffset); + if (memcmp((u8 *)(bulkdata->d[0].os_data_ptr+llcSnapHeaderOffset+wapiProtocolIdSNAPHeaderOffset), + wapiProtocolIdSNAPHeader,sizeof(wapiProtocolIdSNAPHeader))) { + + unifi_trace(priv, UDBG6, "check_routing_pkt_data_ind(): This is a data & NOT a WAI protocol packet\n"); + /* On the first unicast data pkt that is decrypted successfully after re-keying, reset the filter */ + priv->wapi_unicast_queued_pkt_filter = 0; + unifi_trace(priv, UDBG4, "check_routing_pkt_data_ind(): WAPI AP has started using the new unicast key, no more MIC failures expected (reset filter)\n"); + } + else { + unifi_trace(priv, UDBG6, "check_routing_pkt_data_ind(): WAPI - This is a WAI protocol packet\n"); + } + } + } +#endif + + + switch ((frmCtrl & 0x000c)>>FRAME_CONTROL_TYPE_FIELD_OFFSET) { + case IEEE802_11_FRAMETYPE_MANAGEMENT: + *freeBulkData = TRUE; /* Free (after SME handler copies it) */ + + /* In P2P device mode, filter the legacy AP beacons here */ + if((interfacePriv->interfaceMode == CSR_WIFI_ROUTER_CTRL_MODE_P2P)&&\ + ((CSR_WIFI_80211_GET_FRAME_SUBTYPE(macHdrLocation)) == CSR_WIFI_80211_FRAME_SUBTYPE_BEACON)){ + + u8 *pSsid, *pSsidLen; + static u8 P2PWildCardSsid[CSR_WIFI_P2P_WILDCARD_SSID_LENGTH] = {'D', 'I', 'R', 'E', 'C', 'T', '-'}; + + pSsidLen = macHdrLocation + MAC_HEADER_SIZE + CSR_WIFI_BEACON_FIXED_LENGTH; + pSsid = pSsidLen + 2; + + if(*(pSsidLen + 1) >= CSR_WIFI_P2P_WILDCARD_SSID_LENGTH){ + if(memcmp(pSsid, P2PWildCardSsid, CSR_WIFI_P2P_WILDCARD_SSID_LENGTH) == 0){ + unifi_trace(priv, UDBG6, "Received a P2P Beacon, pass it to SME\n"); + return TRUE; + } + } + unifi_trace(priv, UDBG6, "Received a Legacy AP beacon in P2P mode, drop it\n"); + return FALSE; + } + return TRUE; /* Route to SME */ + case IEEE802_11_FRAMETYPE_DATA: + case IEEE802_11_FRAMETYPE_CONTROL: + *freeBulkData = FALSE; /* Network stack or MLME handler frees */ + return FALSE; + default: + unifi_error(priv, "Unhandled frame type %04x\n", frmCtrl); + *freeBulkData = TRUE; /* Not interested, but must free it */ + return FALSE; + } +} + +/* + * --------------------------------------------------------------------------- + * unifi_process_receive_event + * + * Dispatcher for received signals. + * + * This function receives the 'to host' signals and forwards + * them to the unifi linux clients. + * + * Arguments: + * ospriv Pointer to driver's private data. + * sigdata Pointer to the packed signal buffer. + * siglen Length of the packed signal. + * bulkdata Pointer to the signal's bulk data. + * + * Returns: + * None. + * + * Notes: + * The signals are received in the format described in the host interface + * specification, i.e wire formatted. Certain clients use the same format + * to interpret them and other clients use the host formatted structures. + * Each client has to call read_unpack_signal() to transform the wire + * formatted signal into the host formatted signal, if necessary. + * The code is in the core, since the signals are defined therefore + * binded to the host interface specification. + * --------------------------------------------------------------------------- + */ +static void +unifi_process_receive_event(void *ospriv, + u8 *sigdata, u32 siglen, + const bulk_data_param_t *bulkdata) +{ + unifi_priv_t *priv = (unifi_priv_t*)ospriv; + int i, receiver_id; + int client_id; + s16 signal_id; + u8 pktIndToSme = FALSE, freeBulkData = FALSE; + + func_enter(); + + unifi_trace(priv, UDBG5, "unifi_process_receive_event: " + "%04x %04x %04x %04x %04x %04x %04x %04x (%d)\n", + CSR_GET_UINT16_FROM_LITTLE_ENDIAN((sigdata) + sizeof(s16)*0) & 0xFFFF, + CSR_GET_UINT16_FROM_LITTLE_ENDIAN((sigdata) + sizeof(s16)*1) & 0xFFFF, + CSR_GET_UINT16_FROM_LITTLE_ENDIAN((sigdata) + sizeof(s16)*2) & 0xFFFF, + CSR_GET_UINT16_FROM_LITTLE_ENDIAN((sigdata) + sizeof(s16)*3) & 0xFFFF, + CSR_GET_UINT16_FROM_LITTLE_ENDIAN((sigdata) + sizeof(s16)*4) & 0xFFFF, + CSR_GET_UINT16_FROM_LITTLE_ENDIAN((sigdata) + sizeof(s16)*5) & 0xFFFF, + CSR_GET_UINT16_FROM_LITTLE_ENDIAN((sigdata) + sizeof(s16)*6) & 0xFFFF, + CSR_GET_UINT16_FROM_LITTLE_ENDIAN((sigdata) + sizeof(s16)*7) & 0xFFFF, + siglen); + + receiver_id = CSR_GET_UINT16_FROM_LITTLE_ENDIAN((sigdata) + sizeof(s16)) & 0xFF00; + client_id = (receiver_id & 0x0F00) >> UDI_SENDER_ID_SHIFT; + signal_id = CSR_GET_UINT16_FROM_LITTLE_ENDIAN(sigdata); + + + + /* check for the type of frame received (checks for 802.11 management frames) */ + if (signal_id == CSR_MA_PACKET_INDICATION_ID) + { +#define CSR_MA_PACKET_INDICATION_INTERFACETAG_OFFSET 14 + u8 interfaceTag; + netInterface_priv_t *interfacePriv; + + /* Pull out interface tag from virtual interface identifier */ + interfaceTag = (CSR_GET_UINT16_FROM_LITTLE_ENDIAN(sigdata + CSR_MA_PACKET_INDICATION_INTERFACETAG_OFFSET)) & 0xff; + interfacePriv = priv->interfacePriv[interfaceTag]; + + /* Update activity for this station in case of IBSS */ +#ifdef CSR_SUPPORT_SME + if (interfacePriv->interfaceMode == CSR_WIFI_ROUTER_CTRL_MODE_IBSS) + { + u8 *saddr; + /* Fetch the source address from mac header */ + saddr = (u8 *) bulkdata->d[0].os_data_ptr + MAC_HEADER_ADDR2_OFFSET; + unifi_trace(priv, UDBG5, + "Updating sta activity in IBSS interfaceTag %x Src Addr %x:%x:%x:%x:%x:%x\n", + interfaceTag, saddr[0], saddr[1], saddr[2], saddr[3], saddr[4], saddr[5]); + + uf_update_sta_activity(priv, interfaceTag, saddr); + } +#endif + + pktIndToSme = check_routing_pkt_data_ind(priv, sigdata, bulkdata, &freeBulkData, interfacePriv); + + unifi_trace(priv, UDBG6, "RX: packet entry point to driver from HIP,pkt to SME ?(%s) \n", (pktIndToSme)? "YES":"NO"); + + } + + if (pktIndToSme) + { + /* Management MA_PACKET_IND for SME */ + if(sigdata != NULL && bulkdata != NULL){ + send_to_client(priv, priv->sme_cli, receiver_id, sigdata, siglen, bulkdata); + } + else{ + unifi_error(priv, "unifi_receive_event2: sigdata or Bulkdata is NULL \n"); + } +#ifdef CSR_NATIVE_LINUX + send_to_client(priv, priv->wext_client, + receiver_id, + sigdata, siglen, bulkdata); +#endif + } + else + { + /* Signals with ReceiverId==0 are also reported to SME / WEXT, + * unless they are data/control MA_PACKET_INDs or VIF_AVAILABILITY_INDs + */ + if (!receiver_id) { + if(signal_id == CSR_MA_VIF_AVAILABILITY_INDICATION_ID) { + uf_process_ma_vif_availibility_ind(priv, sigdata, siglen); + } + else if (signal_id != CSR_MA_PACKET_INDICATION_ID) { + send_to_client(priv, priv->sme_cli, receiver_id, sigdata, siglen, bulkdata); +#ifdef CSR_NATIVE_LINUX + send_to_client(priv, priv->wext_client, + receiver_id, + sigdata, siglen, bulkdata); +#endif + } + else + { + +#if (defined(CSR_SUPPORT_SME) && defined(CSR_WIFI_SECURITY_WAPI_ENABLE)) + #define CSR_MA_PACKET_INDICATION_RECEPTION_STATUS_OFFSET sizeof(CSR_SIGNAL_PRIMITIVE_HEADER) + 22 + netInterface_priv_t *interfacePriv; + u8 interfaceTag; + u16 receptionStatus = CSR_RX_SUCCESS; + + /* Pull out interface tag from virtual interface identifier */ + interfaceTag = (CSR_GET_UINT16_FROM_LITTLE_ENDIAN(sigdata + CSR_MA_PACKET_INDICATION_INTERFACETAG_OFFSET)) & 0xff; + interfacePriv = priv->interfacePriv[interfaceTag]; + + /* check for MIC failure */ + receptionStatus = CSR_GET_UINT16_FROM_LITTLE_ENDIAN(sigdata + CSR_MA_PACKET_INDICATION_RECEPTION_STATUS_OFFSET); + + /* Send a WAPI MPDU to SME for re-check MIC if the respective filter has been set*/ + if ((!freeBulkData) && + (interfacePriv->interfaceMode == CSR_WIFI_ROUTER_CTRL_MODE_STA) && + (receptionStatus == CSR_MICHAEL_MIC_ERROR) && + ((priv->wapi_multicast_filter == 1) +#ifdef CSR_WIFI_SECURITY_WAPI_SW_ENCRYPTION + || (priv->wapi_unicast_filter == 1) +#endif + )) + { + CSR_SIGNAL signal; + u8 *destAddr; + CsrResult res; + u16 interfaceTag = 0; + u8 isMcastPkt = TRUE; + + unifi_trace(priv, UDBG6, "Received a WAPI data packet when the Unicast/Multicast filter is set\n"); + res = read_unpack_signal(sigdata, &signal); + if (res) { + unifi_error(priv, "Received unknown or corrupted signal (0x%x).\n", + CSR_GET_UINT16_FROM_LITTLE_ENDIAN(sigdata)); + return; + } + + /* Check if the type of MPDU and the respective filter status*/ + destAddr = (u8 *) bulkdata->d[0].os_data_ptr + MAC_HEADER_ADDR1_OFFSET; + isMcastPkt = (destAddr[0] & 0x01) ? TRUE : FALSE; + unifi_trace(priv, UDBG6, + "1.MPDU type: (%s), 2.Multicast filter: (%s), 3. Unicast filter: (%s)\n", + ((isMcastPkt) ? "Multiast":"Unicast"), + ((priv->wapi_multicast_filter) ? "Enabled":"Disabled"), + ((priv->wapi_unicast_filter) ? "Enabled":"Disabled")); + + if (((isMcastPkt) && (priv->wapi_multicast_filter == 1)) +#ifdef CSR_WIFI_SECURITY_WAPI_SW_ENCRYPTION + || ((!isMcastPkt) && (priv->wapi_unicast_filter == 1)) +#endif + ) + { + unifi_trace(priv, UDBG4, "Sending the WAPI MPDU for MIC check\n"); + CsrWifiRouterCtrlWapiRxMicCheckIndSend(priv->CSR_WIFI_SME_IFACEQUEUE, 0, interfaceTag, siglen, sigdata, bulkdata->d[0].data_length, (u8*)bulkdata->d[0].os_data_ptr); + + for (i = 0; i < UNIFI_MAX_DATA_REFERENCES; i++) { + if (bulkdata->d[i].data_length != 0) { + unifi_net_data_free(priv, (void *)&bulkdata->d[i]); + } + } + func_exit(); + return; + } + } /* CSR_MA_PACKET_INDICATION_ID */ +#endif /*CSR_SUPPORT_SME && CSR_WIFI_SECURITY_WAPI_ENABLE*/ + } + } + + /* calls the registered clients handler callback func. + * netdev_mlme_event_handler is one of the registered handler used to route + * data packet to network stack or AMP/EAPOL related data to SME + * + * The freeBulkData check ensures that, it has received a management frame and + * the frame needs to be freed here. So not to be passed to netdev handler + */ + if(!freeBulkData){ + if ((client_id < MAX_UDI_CLIENTS) && + (&priv->ul_clients[client_id] != priv->logging_client)) { + unifi_trace(priv, UDBG6, "Call the registered clients handler callback func\n"); + send_to_client(priv, &priv->ul_clients[client_id], + receiver_id, + sigdata, siglen, bulkdata); + } + } + } + + /* + * Free bulk data buffers here unless it is a CSR_MA_PACKET_INDICATION + */ + switch (signal_id) + { +#ifdef UNIFI_SNIFF_ARPHRD + case CSR_MA_SNIFFDATA_INDICATION_ID: +#endif + break; + + case CSR_MA_PACKET_INDICATION_ID: + if (!freeBulkData) + { + break; + } + /* FALLS THROUGH... */ + default: + for (i = 0; i < UNIFI_MAX_DATA_REFERENCES; i++) { + if (bulkdata->d[i].data_length != 0) { + unifi_net_data_free(priv, (void *)&bulkdata->d[i]); + } + } + } + + func_exit(); +} /* unifi_process_receive_event() */ + + +#ifdef CSR_WIFI_RX_PATH_SPLIT +static u8 signal_buffer_is_full(unifi_priv_t* priv) +{ + return (((priv->rxSignalBuffer.writePointer + 1)% priv->rxSignalBuffer.size) == (priv->rxSignalBuffer.readPointer)); +} + +void unifi_rx_queue_flush(void *ospriv) +{ + unifi_priv_t *priv = (unifi_priv_t*)ospriv; + + func_enter(); + unifi_trace(priv, UDBG4, "rx_wq_handler: RdPtr = %d WritePtr = %d\n", + priv->rxSignalBuffer.readPointer,priv->rxSignalBuffer.writePointer); + if(priv != NULL) { + u8 readPointer = priv->rxSignalBuffer.readPointer; + while (readPointer != priv->rxSignalBuffer.writePointer) + { + rx_buff_struct_t *buf = &priv->rxSignalBuffer.rx_buff[readPointer]; + unifi_trace(priv, UDBG6, "rx_wq_handler: RdPtr = %d WritePtr = %d\n", + readPointer,priv->rxSignalBuffer.writePointer); + unifi_process_receive_event(priv, buf->bufptr, buf->sig_len, &buf->data_ptrs); + readPointer ++; + if(readPointer >= priv->rxSignalBuffer.size) { + readPointer = 0; + } + } + priv->rxSignalBuffer.readPointer = readPointer; + } + func_exit(); +} + +void rx_wq_handler(struct work_struct *work) +{ + unifi_priv_t *priv = container_of(work, unifi_priv_t, rx_work_struct); + unifi_rx_queue_flush(priv); +} +#endif + + + +/* + * --------------------------------------------------------------------------- + * unifi_receive_event + * + * Dispatcher for received signals. + * + * This function receives the 'to host' signals and forwards + * them to the unifi linux clients. + * + * Arguments: + * ospriv Pointer to driver's private data. + * sigdata Pointer to the packed signal buffer. + * siglen Length of the packed signal. + * bulkdata Pointer to the signal's bulk data. + * + * Returns: + * None. + * + * Notes: + * The signals are received in the format described in the host interface + * specification, i.e wire formatted. Certain clients use the same format + * to interpret them and other clients use the host formatted structures. + * Each client has to call read_unpack_signal() to transform the wire + * formatted signal into the host formatted signal, if necessary. + * The code is in the core, since the signals are defined therefore + * binded to the host interface specification. + * --------------------------------------------------------------------------- + */ +void +unifi_receive_event(void *ospriv, + u8 *sigdata, u32 siglen, + const bulk_data_param_t *bulkdata) +{ +#ifdef CSR_WIFI_RX_PATH_SPLIT + unifi_priv_t *priv = (unifi_priv_t*)ospriv; + u8 writePointer; + int i; + rx_buff_struct_t * rx_buff; + func_enter(); + + unifi_trace(priv, UDBG5, "unifi_receive_event: " + "%04x %04x %04x %04x %04x %04x %04x %04x (%d)\n", + CSR_GET_UINT16_FROM_LITTLE_ENDIAN((sigdata) + sizeof(s16)*0) & 0xFFFF, + CSR_GET_UINT16_FROM_LITTLE_ENDIAN((sigdata) + sizeof(s16)*1) & 0xFFFF, + CSR_GET_UINT16_FROM_LITTLE_ENDIAN((sigdata) + sizeof(s16)*2) & 0xFFFF, + CSR_GET_UINT16_FROM_LITTLE_ENDIAN((sigdata) + sizeof(s16)*3) & 0xFFFF, + CSR_GET_UINT16_FROM_LITTLE_ENDIAN((sigdata) + sizeof(s16)*4) & 0xFFFF, + CSR_GET_UINT16_FROM_LITTLE_ENDIAN((sigdata) + sizeof(s16)*5) & 0xFFFF, + CSR_GET_UINT16_FROM_LITTLE_ENDIAN((sigdata) + sizeof(s16)*6) & 0xFFFF, + CSR_GET_UINT16_FROM_LITTLE_ENDIAN((sigdata) + sizeof(s16)*7) & 0xFFFF, siglen); + if(signal_buffer_is_full(priv)) { + unifi_error(priv,"TO HOST signal queue FULL dropping the PDU\n"); + for (i = 0; i < UNIFI_MAX_DATA_REFERENCES; i++) { + if (bulkdata->d[i].data_length != 0) { + unifi_net_data_free(priv, (void *)&bulkdata->d[i]); + } + } + return; + } + writePointer = priv->rxSignalBuffer.writePointer; + rx_buff = &priv->rxSignalBuffer.rx_buff[writePointer]; + memcpy(rx_buff->bufptr,sigdata,siglen); + rx_buff->sig_len = siglen; + rx_buff->data_ptrs = *bulkdata; + writePointer++; + if(writePointer >= priv->rxSignalBuffer.size) { + writePointer =0; + } + unifi_trace(priv, UDBG4, "unifi_receive_event:writePtr = %d\n",priv->rxSignalBuffer.writePointer); + priv->rxSignalBuffer.writePointer = writePointer; + +#ifndef CSR_WIFI_RX_PATH_SPLIT_DONT_USE_WQ + queue_work(priv->rx_workqueue, &priv->rx_work_struct); +#endif + +#else + unifi_process_receive_event(ospriv, sigdata, siglen, bulkdata); +#endif + func_exit(); +} /* unifi_receive_event() */ + |