/* * Intel Wireless Multicomm 3200 WiFi driver * * Copyright (C) 2009 Intel Corporation. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * Neither the name of Intel Corporation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * * Intel Corporation * Samuel Ortiz * Zhu Yi * */ #include #include #include #include #include #include #include #include #include "iwm.h" #include "debug.h" #include "hal.h" #include "umac.h" #include "lmac.h" #include "commands.h" #include "rx.h" #include "cfg80211.h" #include "eeprom.h" static int iwm_rx_check_udma_hdr(struct iwm_udma_in_hdr *hdr) { if ((le32_to_cpu(hdr->cmd) == UMAC_PAD_TERMINAL) || (le32_to_cpu(hdr->size) == UMAC_PAD_TERMINAL)) return -EINVAL; return 0; } static inline int iwm_rx_resp_size(struct iwm_udma_in_hdr *hdr) { return ALIGN(le32_to_cpu(hdr->size) + sizeof(struct iwm_udma_in_hdr), 16); } /* * Notification handlers: * * For every possible notification we can receive from the * target, we have a handler. * When we get a target notification, and there is no one * waiting for it, it's just processed through the rx code * path: * * iwm_rx_handle() * -> iwm_rx_handle_umac() * -> iwm_rx_handle_wifi() * -> iwm_rx_handle_resp() * -> iwm_ntf_*() * * OR * * -> iwm_rx_handle_non_wifi() * * If there are processes waiting for this notification, then * iwm_rx_handle_wifi() just wakes those processes up and they * grab the pending notification. */ static int iwm_ntf_error(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size, struct iwm_wifi_cmd *cmd) { struct iwm_umac_notif_error *error; struct iwm_fw_error_hdr *fw_err; error = (struct iwm_umac_notif_error *)buf; fw_err = &error->err; IWM_ERR(iwm, "%cMAC FW ERROR:\n", (le32_to_cpu(fw_err->category) == UMAC_SYS_ERR_CAT_LMAC) ? 'L' : 'U'); IWM_ERR(iwm, "\tCategory: %d\n", le32_to_cpu(fw_err->category)); IWM_ERR(iwm, "\tStatus: 0x%x\n", le32_to_cpu(fw_err->status)); IWM_ERR(iwm, "\tPC: 0x%x\n", le32_to_cpu(fw_err->pc)); IWM_ERR(iwm, "\tblink1: %d\n", le32_to_cpu(fw_err->blink1)); IWM_ERR(iwm, "\tblink2: %d\n", le32_to_cpu(fw_err->blink2)); IWM_ERR(iwm, "\tilink1: %d\n", le32_to_cpu(fw_err->ilink1)); IWM_ERR(iwm, "\tilink2: %d\n", le32_to_cpu(fw_err->ilink2)); IWM_ERR(iwm, "\tData1: 0x%x\n", le32_to_cpu(fw_err->data1)); IWM_ERR(iwm, "\tData2: 0x%x\n", le32_to_cpu(fw_err->data2)); IWM_ERR(iwm, "\tLine number: %d\n", le32_to_cpu(fw_err->line_num)); IWM_ERR(iwm, "\tUMAC status: 0x%x\n", le32_to_cpu(fw_err->umac_status)); IWM_ERR(iwm, "\tLMAC status: 0x%x\n", le32_to_cpu(fw_err->lmac_status)); IWM_ERR(iwm, "\tSDIO status: 0x%x\n", le32_to_cpu(fw_err->sdio_status)); return 0; } static int iwm_ntf_umac_alive(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size, struct iwm_wifi_cmd *cmd) { struct iwm_umac_notif_alive *alive_resp = (struct iwm_umac_notif_alive *)(buf); u16 status = le16_to_cpu(alive_resp->status); if (status == UMAC_NTFY_ALIVE_STATUS_ERR) { IWM_ERR(iwm, "Receive error UMAC_ALIVE\n"); return -EIO; } iwm_tx_credit_init_pools(iwm, alive_resp); return 0; } static int iwm_ntf_init_complete(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size, struct iwm_wifi_cmd *cmd) { struct wiphy *wiphy = iwm_to_wiphy(iwm); struct iwm_umac_notif_init_complete *init_complete = (struct iwm_umac_notif_init_complete *)(buf); u16 status = le16_to_cpu(init_complete->status); bool blocked = (status == UMAC_NTFY_INIT_COMPLETE_STATUS_ERR); if (blocked) IWM_DBG_NTF(iwm, DBG, "Hardware rf kill is on (radio off)\n"); else IWM_DBG_NTF(iwm, DBG, "Hardware rf kill is off (radio on)\n"); wiphy_rfkill_set_hw_state(wiphy, blocked); return 0; } static int iwm_ntf_tx_credit_update(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size, struct iwm_wifi_cmd *cmd) { int pool_nr, total_freed_pages; unsigned long pool_map; int i, id; struct iwm_umac_notif_page_dealloc *dealloc = (struct iwm_umac_notif_page_dealloc *)buf; pool_nr = GET_VAL32(dealloc->changes, UMAC_DEALLOC_NTFY_CHANGES_CNT); pool_map = GET_VAL32(dealloc->changes, UMAC_DEALLOC_NTFY_CHANGES_MSK); IWM_DBG_TX(iwm, DBG, "UMAC dealloc notification: pool nr %d, " "update map 0x%lx\n", pool_nr, pool_map); spin_lock(&iwm->tx_credit.lock); for (i = 0; i < pool_nr; i++) { id = GET_VAL32(dealloc->grp_info[i], UMAC_DEALLOC_NTFY_GROUP_NUM); if (test_bit(id, &pool_map)) { total_freed_pages = GET_VAL32(dealloc->grp_info[i], UMAC_DEALLOC_NTFY_PAGE_CNT); iwm_tx_credit_inc(iwm, id, total_freed_pages); } } spin_unlock(&iwm->tx_credit.lock); return 0; } static int iwm_ntf_umac_reset(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size, struct iwm_wifi_cmd *cmd) { IWM_DBG_NTF(iwm, DBG, "UMAC RESET done\n"); return 0; } static int iwm_ntf_lmac_version(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size, struct iwm_wifi_cmd *cmd) { IWM_DBG_NTF(iwm, INFO, "LMAC Version: %x.%x\n", buf[9], buf[8]); return 0; } static int iwm_ntf_tx(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size, struct iwm_wifi_cmd *cmd) { struct iwm_lmac_tx_resp *tx_resp; struct iwm_umac_wifi_in_hdr *hdr; tx_resp = (struct iwm_lmac_tx_resp *) (buf + sizeof(struct iwm_umac_wifi_in_hdr)); hdr = (struct iwm_umac_wifi_in_hdr *)buf; IWM_DBG_TX(iwm, DBG, "REPLY_TX, buf size: %lu\n", buf_size); IWM_DBG_TX(iwm, DBG, "Seqnum: %d\n", le16_to_cpu(hdr->sw_hdr.cmd.seq_num)); IWM_DBG_TX(iwm, DBG, "\tFrame cnt: %d\n", tx_resp->frame_cnt); IWM_DBG_TX(iwm, DBG, "\tRetry cnt: %d\n", le16_to_cpu(tx_resp->retry_cnt)); IWM_DBG_TX(iwm, DBG, "\tSeq ctl: %d\n", le16_to_cpu(tx_resp->seq_ctl)); IWM_DBG_TX(iwm, DBG, "\tByte cnt: %d\n", le16_to_cpu(tx_resp->byte_cnt)); IWM_DBG_TX(iwm, DBG, "\tStatus: 0x%x\n", le32_to_cpu(tx_resp->status)); return 0; } static int iwm_ntf_calib_res(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size, struct iwm_wifi_cmd *cmd) { u8 opcode; u8 *calib_buf; struct iwm_lmac_calib_hdr *hdr = (struct iwm_lmac_calib_hdr *) (buf + sizeof(struct iwm_umac_wifi_in_hdr)); opcode = hdr->opcode; BUG_ON(opcode >= CALIBRATION_CMD_NUM || opcode < PHY_CALIBRATE_OPCODES_NUM); IWM_DBG_NTF(iwm, DBG, "Store calibration result for opcode: %d\n", opcode); buf_size -= sizeof(struct iwm_umac_wifi_in_hdr); calib_buf = iwm->calib_res[opcode].buf; if (!calib_buf || (iwm->calib_res[opcode].size < buf_size)) { kfree(calib_buf); calib_buf = kzalloc(buf_size, GFP_KERNEL); if (!calib_buf) { IWM_ERR(iwm, "Memory allocation failed: calib_res\n"); return -ENOMEM; } iwm->calib_res[opcode].buf = calib_buf; iwm->calib_res[opcode].size = buf_size; } memcpy(calib_buf, hdr, buf_size); set_bit(opcode - PHY_CALIBRATE_OPCODES_NUM, &iwm->calib_done_map); return 0; } static int iwm_ntf_calib_complete(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size, struct iwm_wifi_cmd *cmd) { IWM_DBG_NTF(iwm, DBG, "Calibration completed\n"); return 0; } static int iwm_ntf_calib_cfg(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size, struct iwm_wifi_cmd *cmd) { struct iwm_lmac_cal_cfg_resp *cal_resp; cal_resp = (struct iwm_lmac_cal_cfg_resp *) (buf + sizeof(struct iwm_umac_wifi_in_hdr)); IWM_DBG_NTF(iwm, DBG, "Calibration CFG command status: %d\n", le32_to_cpu(cal_resp->status)); return 0; } static int iwm_ntf_wifi_status(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size, struct iwm_wifi_cmd *cmd) { struct iwm_umac_notif_wifi_status *status = (struct iwm_umac_notif_wifi_status *)buf; iwm->core_enabled |= le16_to_cpu(status->status); return 0; } static struct iwm_rx_ticket_node * iwm_rx_ticket_node_alloc(struct iwm_priv *iwm, struct iwm_rx_ticket *ticket) { struct iwm_rx_ticket_node *ticket_node; ticket_node = kzalloc(sizeof(struct iwm_rx_ticket_node), GFP_KERNEL); if (!ticket_node) { IWM_ERR(iwm, "Couldn't allocate ticket node\n"); return ERR_PTR(-ENOMEM); } ticket_node->ticket = kzalloc(sizeof(struct iwm_rx_ticket), GFP_KERNEL); if (!ticket_node->ticket) { IWM_ERR(iwm, "Couldn't allocate RX ticket\n"); kfree(ticket_node); return ERR_PTR(-ENOMEM); } memcpy(ticket_node->ticket, ticket, sizeof(struct iwm_rx_ticket)); INIT_LIST_HEAD(&ticket_node->node); return ticket_node; } static void iwm_rx_ticket_node_free(struct iwm_rx_ticket_node *ticket_node) { kfree(ticket_node->ticket); kfree(ticket_node); } static struct iwm_rx_packet *iwm_rx_packet_get(struct iwm_priv *iwm, u16 id) { u8 id_hash = IWM_RX_ID_GET_HASH(id); struct list_head *packet_list; struct iwm_rx_packet *packet, *next; packet_list = &iwm->rx_packets[id_hash]; list_for_each_entry_safe(packet, next, packet_list, node) if (packet->id == id) return packet; return NULL; } static struct iwm_rx_packet *iwm_rx_packet_alloc(struct iwm_priv *iwm, u8 *buf, u32 size, u16 id) { struct iwm_rx_packet *packet; packet = kzalloc(sizeof(struct iwm_rx_packet), GFP_KERNEL); if (!packet) { IWM_ERR(iwm, "Couldn't allocate packet\n"); return ERR_PTR(-ENOMEM); } packet->skb = dev_alloc_skb(size); if (!packet->skb) { IWM_ERR(iwm, "Couldn't allocate packet SKB\n"); kfree(packet); return ERR_PTR(-ENOMEM); } packet->pkt_size = size; skb_put(packet->skb, size); memcpy(packet->skb->data, buf, size); INIT_LIST_HEAD(&packet->node); packet->id = id; return packet; } void iwm_rx_free(struct iwm_priv *iwm) { struct iwm_rx_ticket_node *ticket, *nt; struct iwm_rx_packet *packet, *np; int i; list_for_each_entry_safe(ticket, nt, &iwm->rx_tickets, node) { list_del(&ticket->node); iwm_rx_ticket_node_free(ticket); } for (i = 0; i < IWM_RX_ID_HASH; i++) { list_for_each_entry_safe(packet, np, &iwm->rx_packets[i], node) { list_del(&packet->node); kfree_skb(packet->skb); kfree(packet); } } } static int iwm_ntf_rx_ticket(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size, struct iwm_wifi_cmd *cmd) { struct iwm_umac_notif_rx_ticket *ntf_rx_ticket = (struct iwm_umac_notif_rx_ticket *)buf; struct iwm_rx_ticket *ticket = (struct iwm_rx_ticket *)ntf_rx_ticket->tickets; int i, schedule_rx = 0; for (i = 0; i < ntf_rx_ticket->num_tickets; i++) { struct iwm_rx_ticket_node *ticket_node; switch (le16_to_cpu(ticket->action)) { case IWM_RX_TICKET_RELEASE: case IWM_RX_TICKET_DROP: /* We can push the packet to the stack */ ticket_node = iwm_rx_ticket_node_alloc(iwm, ticket); if (IS_ERR(ticket_node)) return PTR_ERR(ticket_node); IWM_DBG_RX(iwm, DBG, "TICKET RELEASE(%d)\n", ticket->id); list_add_tail(&ticket_node->node, &iwm->rx_tickets); /* * We received an Rx ticket, most likely there's * a packet pending for it, it's not worth going * through the packet hash list to double check. * Let's just fire the rx worker.. */ schedule_rx = 1; break; default: IWM_ERR(iwm, "Invalid RX ticket action: 0x%x\n", ticket->action); } ticket++; } if (schedule_rx) queue_work(iwm->rx_wq, &iwm->rx_worker); return 0; } static int iwm_ntf_rx_packet(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size, struct iwm_wifi_cmd *cmd) { struct iwm_umac_wifi_in_hdr *wifi_hdr; struct iwm_rx_packet *packet; u16 id, buf_offset; u32 packet_size; IWM_DBG_RX(iwm, DBG, "\n"); wifi_hdr = (struct iwm_umac_wifi_in_hdr *)buf; id = le16_to_cpu(wifi_hdr->sw_hdr.cmd.seq_num); buf_offset = sizeof(struct iwm_umac_wifi_in_hdr); packet_size = buf_size - sizeof(struct iwm_umac_wifi_in_hdr); IWM_DBG_RX(iwm, DBG, "CMD:0x%x, seqnum: %d, packet size: %d\n", wifi_hdr->sw_hdr.cmd.cmd, id, packet_size); IWM_DBG_RX(iwm, DBG, "Packet id: %d\n", id); IWM_HEXDUMP(iwm, DBG, RX, "PACKET: ", buf + buf_offset, packet_size); packet = iwm_rx_packet_alloc(iwm, buf + buf_offset, packet_size, id); if (IS_ERR(packet)) return PTR_ERR(packet); list_add_tail(&packet->node, &iwm->rx_packets[IWM_RX_ID_GET_HASH(id)]); /* We might (unlikely) have received the packet _after_ the ticket */ queue_work(iwm->rx_wq, &iwm->rx_worker); return 0; } /* MLME handlers */ static int iwm_mlme_assoc_start(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size, struct iwm_wifi_cmd *cmd) { struct iwm_umac_notif_assoc_start *start; start = (struct iwm_umac_notif_assoc_start *)buf; set_bit(IWM_STATUS_ASSOCIATING, &iwm->status); IWM_DBG_MLME(iwm, INFO, "Association with %pM Started, reason: %d\n", start->bssid, le32_to_cpu(start->roam_reason)); wake_up_interruptible(&iwm->mlme_queue); return 0; } static int iwm_mlme_assoc_complete(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size, struct iwm_wifi_cmd *cmd) { struct iwm_umac_notif_assoc_complete *complete = (struct iwm_umac_notif_assoc_complete *)buf; IWM_DBG_MLME(iwm, INFO, "Association with %pM completed, status: %d\n", complete->bssid, complete->status); clear_bit(IWM_STATUS_ASSOCIATING, &iwm->status); switch (le32_to_cpu(complete->status)) { case UMAC_ASSOC_COMPLETE_SUCCESS: set_bit(IWM_STATUS_ASSOCIATED, &iwm->status); memcpy(iwm->bssid, complete->bssid, ETH_ALEN); iwm->channel = complete->channel; iwm_link_on(iwm); cfg80211_connect_result(iwm_to_ndev(iwm), complete->bssid, iwm->req_ie, iwm->req_ie_len, iwm->resp_ie, iwm->resp_ie_len, WLAN_STATUS_SUCCESS, GFP_KERNEL); break; case UMAC_ASSOC_COMPLETE_FAILURE: clear_bit(IWM_STATUS_ASSOCIATED, &iwm->status); memset(iwm->bssid, 0, ETH_ALEN); iwm->channel = 0; iwm_link_off(iwm); cfg80211_connect_result(iwm_to_ndev(iwm), complete->bssid, NULL, 0, NULL, 0, WLAN_STATUS_UNSPECIFIED_FAILURE, GFP_KERNEL); default: break; } if (iwm->conf.mode == UMAC_MODE_IBSS) { cfg80211_ibss_joined(iwm_to_ndev(iwm), iwm->bssid, GFP_KERNEL); return 0; } return 0; } static int iwm_mlme_profile_invalidate(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size, struct iwm_wifi_cmd *cmd) { struct iwm_umac_notif_profile_invalidate *invalid; invalid = (struct iwm_umac_notif_profile_invalidate *)buf; IWM_DBG_MLME(iwm, INFO, "Profile Invalidated. Reason: %d\n", le32_to_cpu(invalid->reason)); clear_bit(IWM_STATUS_ASSOCIATING, &iwm->status); clear_bit(IWM_STATUS_ASSOCIATED, &iwm->status); iwm->umac_profile_active = 0; memset(iwm->bssid, 0, ETH_ALEN); iwm->channel = 0; iwm_link_off(iwm); wake_up_interruptible(&iwm->mlme_queue); return 0; } static int iwm_mlme_scan_complete(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size, struct iwm_wifi_cmd *cmd) { int ret; struct iwm_umac_notif_scan_complete *scan_complete = (struct iwm_umac_notif_scan_complete *)buf; u32 result = le32_to_cpu(scan_complete->result); IWM_DBG_MLME(iwm, INFO, "type:0x%x result:0x%x seq:%d\n", le32_to_cpu(scan_complete->type), le32_to_cpu(scan_complete->result), scan_complete->seq_num); if (!test_and_clear_bit(IWM_STATUS_SCANNING, &iwm->status)) { IWM_ERR(iwm, "Scan complete while device not scanning\n"); return -EIO; } if (!iwm->scan_request) return 0; ret = iwm_cfg80211_inform_bss(iwm); cfg80211_scan_done(iwm->scan_request, (result & UMAC_SCAN_RESULT_ABORTED) ? 1 : !!ret); iwm->scan_request = NULL; return ret; } static int iwm_mlme_update_sta_table(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size, struct iwm_wifi_cmd *cmd) { struct iwm_umac_notif_sta_info *umac_sta = (struct iwm_umac_notif_sta_info *)buf; struct iwm_sta_info *sta; int i; switch (le32_to_cpu(umac_sta->opcode)) { case UMAC_OPCODE_ADD_MODIFY: sta = &iwm->sta_table[GET_VAL8(umac_sta->sta_id, LMAC_STA_ID)]; IWM_DBG_MLME(iwm, INFO, "%s STA: ID = %d, Color = %d, " "addr = %pM, qos = %d\n", sta->valid ? "Modify" : "Add", GET_VAL8(umac_sta->sta_id, LMAC_STA_ID), GET_VAL8(umac_sta->sta_id, LMAC_STA_COLOR), umac_sta->mac_addr, umac_sta->flags & UMAC_STA_FLAG_QOS); sta->valid = 1; sta->qos = umac_sta->flags & UMAC_STA_FLAG_QOS; sta->color = GET_VAL8(umac_sta->sta_id, LMAC_STA_COLOR); memcpy(sta->addr, umac_sta->mac_addr, ETH_ALEN); break; case UMAC_OPCODE_REMOVE: IWM_DBG_MLME(iwm, INFO, "Remove STA: ID = %d, Color = %d, " "addr = %pM\n", GET_VAL8(umac_sta->sta_id, LMAC_STA_ID), GET_VAL8(umac_sta->sta_id, LMAC_STA_COLOR), umac_sta->mac_addr); sta = &iwm->sta_table[GET_VAL8(umac_sta->sta_id, LMAC_STA_ID)]; if (!memcmp(sta->addr, umac_sta->mac_addr, ETH_ALEN)) sta->valid = 0; break; case UMAC_OPCODE_CLEAR_ALL: for (i = 0; i < IWM_STA_TABLE_NUM; i++) iwm->sta_table[i].valid = 0; break; default: break; } return 0; } static int iwm_mlme_update_bss_table(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size, struct iwm_wifi_cmd *cmd) { struct wiphy *wiphy = iwm_to_wiphy(iwm); struct ieee80211_mgmt *mgmt; struct iwm_umac_notif_bss_info *umac_bss = (struct iwm_umac_notif_bss_info *)buf; struct ieee80211_channel *channel; struct ieee80211_supported_band *band; struct iwm_bss_info *bss, *next; s32 signal; int freq; u16 frame_len = le16_to_cpu(umac_bss->frame_len); size_t bss_len = sizeof(struct iwm_umac_notif_bss_info) + frame_len; mgmt = (struct ieee80211_mgmt *)(umac_bss->frame_buf); IWM_DBG_MLME(iwm, DBG, "New BSS info entry: %pM\n", mgmt->bssid); IWM_DBG_MLME(iwm, DBG, "\tType: 0x%x\n", le32_to_cpu(umac_bss->type)); IWM_DBG_MLME(iwm, DBG, "\tTimestamp: %d\n", le32_to_cpu(umac_bss->timestamp)); IWM_DBG_MLME(iwm, DBG, "\tTable Index: %d\n", le16_to_cpu(umac_bss->table_idx)); IWM_DBG_MLME(iwm, DBG, "\tBand: %d\n", umac_bss->band); IWM_DBG_MLME(iwm, DBG, "\tChannel: %d\n", umac_bss->channel); IWM_DBG_MLME(iwm, DBG, "\tRSSI: %d\n", umac_bss->rssi); IWM_DBG_MLME(iwm, DBG, "\tFrame Length: %d\n", frame_len); list_for_each_entry_safe(bss, next, &iwm->bss_list, node) if (bss->bss->table_idx == umac_bss->table_idx) break; if (&bss->node != &iwm->bss_list) { /* Remove the old BSS entry, we will add it back later. */ list_del(&bss->node); kfree(bss->bss); } else { /* New BSS entry */ bss = kzalloc(sizeof(struct iwm_bss_info), GFP_KERNEL); if (!bss) { IWM_ERR(iwm, "Couldn't allocate bss_info\n"); return -ENOMEM; } } bss->bss = kzalloc(bss_len, GFP_KERNEL); if (!bss) { kfree(bss); IWM_ERR(iwm, "Couldn't allocate bss\n"); return -ENOMEM; } INIT_LIST_HEAD(&bss->node); memcpy(bss->bss, umac_bss, bss_len); if (umac_bss->band == UMAC_BAND_2GHZ) band = wiphy->bands[IEEE80211_BAND_2GHZ]; else if (umac_bss->band == UMAC_BAND_5GHZ) band = wiphy->bands[IEEE80211_BAND_5GHZ]; else { IWM_ERR(iwm, "Invalid band: %d\n", umac_bss->band); goto err; } freq = ieee80211_channel_to_frequency(umac_bss->channel); channel = ieee80211_get_channel(wiphy, freq); signal = umac_bss->rssi * 100; bss->cfg_bss = cfg80211_inform_bss_frame(wiphy, channel, mgmt, frame_len, signal, GFP_KERNEL); if (!bss->cfg_bss) goto err; list_add_tail(&bss->node, &iwm->bss_list); return 0; err: kfree(bss->bss); kfree(bss); return -EINVAL; } static int iwm_mlme_remove_bss(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size, struct iwm_wifi_cmd *cmd) { struct iwm_umac_notif_bss_removed *bss_rm = (struct iwm_umac_notif_bss_removed *)buf; struct iwm_bss_info *bss, *next; u16 table_idx; int i; for (i = 0; i < le32_to_cpu(bss_rm->count); i++) { table_idx = (le16_to_cpu(bss_rm->entries[i]) & IWM_BSS_REMOVE_INDEX_MSK); list_for_each_entry_safe(bss, next, &iwm->bss_list, node) if (bss->bss->table_idx == cpu_to_le16(table_idx)) { struct ieee80211_mgmt *mgmt; mgmt = (struct ieee80211_mgmt *) (bss->bss->frame_buf); IWM_DBG_MLME(iwm, ERR, "BSS removed: %pM\n", mgmt->bssid); list_del(&bss->node); kfree(bss->bss); kfree(bss); } } return 0; } static int iwm_mlme_mgt_frame(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size, struct iwm_wifi_cmd *cmd) { struct iwm_umac_notif_mgt_frame *mgt_frame = (struct iwm_umac_notif_mgt_frame *)buf; struct ieee80211_mgmt *mgt = (struct ieee80211_mgmt *)mgt_frame->frame; u8 *ie; IWM_HEXDUMP(iwm, DBG, MLME, "MGT: ", mgt_frame->frame, le16_to_cpu(mgt_frame->len)); if (ieee80211_is_assoc_req(mgt->frame_control)) { ie = mgt->u.assoc_req.variable;; iwm->req_ie_len = le16_to_cpu(mgt_frame->len) - (ie - (u8 *)mgt); kfree(iwm->req_ie); iwm->req_ie = kmemdup(mgt->u.assoc_req.variable, iwm->req_ie_len, GFP_KERNEL); } else if (ieee80211_is_reassoc_req(mgt->frame_control)) { ie = mgt->u.reassoc_req.variable;; iwm->req_ie_len = le16_to_cpu(mgt_frame->len) - (ie - (u8 *)mgt); kfree(iwm->req_ie); iwm->req_ie = kmemdup(mgt->u.reassoc_req.variable, iwm->req_ie_len, GFP_KERNEL); } else if (ieee80211_is_assoc_resp(mgt->frame_control)) { ie = mgt->u.assoc_resp.variable;; iwm->resp_ie_len = le16_to_cpu(mgt_frame->len) - (ie - (u8 *)mgt); kfree(iwm->resp_ie); iwm->resp_ie = kmemdup(mgt->u.assoc_resp.variable, iwm->resp_ie_len, GFP_KERNEL); } else if (ieee80211_is_reassoc_resp(mgt->frame_control)) { ie = mgt->u.reassoc_resp.variable;; iwm->resp_ie_len = le16_to_cpu(mgt_frame->len) - (ie - (u8 *)mgt); kfree(iwm->resp_ie); iwm->resp_ie = kmemdup(mgt->u.reassoc_resp.variable, iwm->resp_ie_len, GFP_KERNEL); } else { IWM_ERR(iwm, "Unsupported management frame"); return 0; } return 0; } static int iwm_ntf_mlme(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size, struct iwm_wifi_cmd *cmd) { struct iwm_umac_notif_wifi_if *notif = (struct iwm_umac_notif_wifi_if *)buf; switch (notif->status) { case WIFI_IF_NTFY_ASSOC_START: return iwm_mlme_assoc_start(iwm, buf, buf_size, cmd); case WIFI_IF_NTFY_ASSOC_COMPLETE: return iwm_mlme_assoc_complete(iwm, buf, buf_size, cmd); case WIFI_IF_NTFY_PROFILE_INVALIDATE_COMPLETE: return iwm_mlme_profile_invalidate(iwm, buf, buf_size, cmd); case WIFI_IF_NTFY_CONNECTION_TERMINATED: IWM_DBG_MLME(iwm, DBG, "Connection terminated\n"); break; case WIFI_IF_NTFY_SCAN_COMPLETE: return iwm_mlme_scan_complete(iwm, buf, buf_size, cmd); case WIFI_IF_NTFY_STA_TABLE_CHANGE: return iwm_mlme_update_sta_table(iwm, buf, buf_size, cmd); case WIFI_IF_NTFY_EXTENDED_IE_REQUIRED: IWM_DBG_MLME(iwm, DBG, "Extended IE required\n"); break; case WIFI_IF_NTFY_BSS_TRK_TABLE_CHANGED: return iwm_mlme_update_bss_table(iwm, buf, buf_size, cmd); case WIFI_IF_NTFY_BSS_TRK_ENTRIES_REMOVED: return iwm_mlme_remove_bss(iwm, buf, buf_size, cmd); break; case WIFI_IF_NTFY_MGMT_FRAME: return iwm_mlme_mgt_frame(iwm, buf, buf_size, cmd); case WIFI_DBG_IF_NTFY_SCAN_SUPER_JOB_START: case WIFI_DBG_IF_NTFY_SCAN_SUPER_JOB_COMPLETE: case WIFI_DBG_IF_NTFY_SCAN_CHANNEL_START: case WIFI_DBG_IF_NTFY_SCAN_CHANNEL_RESULT: case WIFI_DBG_IF_NTFY_SCAN_MINI_JOB_START: case WIFI_DBG_IF_NTFY_SCAN_MINI_JOB_COMPLETE: case WIFI_DBG_IF_NTFY_CNCT_ATC_START: case WIFI_DBG_IF_NTFY_COEX_NOTIFICATION: case WIFI_DBG_IF_NTFY_COEX_HANDLE_ENVELOP: case WIFI_DBG_IF_NTFY_COEX_HANDLE_RELEASE_ENVELOP: IWM_DBG_MLME(iwm, DBG, "MLME debug notification: 0x%x\n", notif->status); break; default: IWM_ERR(iwm, "Unhandled notification: 0x%x\n", notif->status); break; } return 0; } #define IWM_STATS_UPDATE_INTERVAL (2 * HZ) static int iwm_ntf_statistics(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size, struct iwm_wifi_cmd *cmd) { struct iwm_umac_notif_stats *stats = (struct iwm_umac_notif_stats *)buf; struct iw_statistics *wstats = &iwm->wstats; u16 max_rate = 0; int i; IWM_DBG_MLME(iwm, DBG, "Statistics notification received\n"); if (test_bit(IWM_STATUS_ASSOCIATED, &iwm->status)) { for (i = 0; i < UMAC_NTF_RATE_SAMPLE_NR; i++) { max_rate = max_t(u16, max_rate, max(le16_to_cpu(stats->tx_rate[i]), le16_to_cpu(stats->rx_rate[i]))); } /* UMAC passes rate info multiplies by 2 */ iwm->rate = max_rate >> 1; } iwm->txpower = le32_to_cpu(stats->tx_power); wstats->status = 0; wstats->discard.nwid = le32_to_cpu(stats->rx_drop_other_bssid); wstats->discard.code = le32_to_cpu(stats->rx_drop_decode); wstats->discard.fragment = le32_to_cpu(stats->rx_drop_reassembly); wstats->discard.retries = le32_to_cpu(stats->tx_drop_max_retry); wstats->miss.beacon = le32_to_cpu(stats->missed_beacons); /* according to cfg80211 */ if (stats->rssi_dbm < -110) wstats->qual.qual = 0; else if (stats->rssi_dbm > -40) wstats->qual.qual = 70; else wstats->qual.qual = stats->rssi_dbm + 110; wstats->qual.level = stats->rssi_dbm; wstats->qual.noise = stats->noise_dbm; wstats->qual.updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM; schedule_delayed_work(&iwm->stats_request, IWM_STATS_UPDATE_INTERVAL); mod_timer(&iwm->watchdog, round_jiffies(jiffies + IWM_WATCHDOG_PERIOD)); return 0; } static int iwm_ntf_eeprom_proxy(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size, struct iwm_wifi_cmd *cmd) { struct iwm_umac_cmd_eeprom_proxy *eeprom_proxy = (struct iwm_umac_cmd_eeprom_proxy *) (buf + sizeof(struct iwm_umac_wifi_in_hdr)); struct iwm_umac_cmd_eeprom_proxy_hdr *hdr = &eeprom_proxy->hdr; u32 hdr_offset = le32_to_cpu(hdr->offset); u32 hdr_len = le32_to_cpu(hdr->len); u32 hdr_type = le32_to_cpu(hdr->type); IWM_DBG_NTF(iwm, DBG, "type: 0x%x, len: %d, offset: 0x%x\n", hdr_type, hdr_len, hdr_offset); if ((hdr_offset + hdr_len) > IWM_EEPROM_LEN) return -EINVAL; switch (hdr_type) { case IWM_UMAC_CMD_EEPROM_TYPE_READ: memcpy(iwm->eeprom + hdr_offset, eeprom_proxy->buf, hdr_len); break; case IWM_UMAC_CMD_EEPROM_TYPE_WRITE: default: return -ENOTSUPP; } return 0; } static int iwm_ntf_channel_info_list(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size, struct iwm_wifi_cmd *cmd) { struct iwm_umac_cmd_get_channel_list *ch_list = (struct iwm_umac_cmd_get_channel_list *) (buf + sizeof(struct iwm_umac_wifi_in_hdr)); struct wiphy *wiphy = iwm_to_wiphy(iwm); struct ieee80211_supported_band *band; int i; band = wiphy->bands[IEEE80211_BAND_2GHZ]; for (i = 0; i < band->n_channels; i++) { unsigned long ch_mask_0 = le32_to_cpu(ch_list->ch[0].channels_mask); unsigned long ch_mask_2 = le32_to_cpu(ch_list->ch[2].channels_mask); if (!test_bit(i, &ch_mask_0)) band->channels[i].flags |= IEEE80211_CHAN_DISABLED; if (!test_bit(i, &ch_mask_2)) band->channels[i].flags |= IEEE80211_CHAN_NO_IBSS; } band = wiphy->bands[IEEE80211_BAND_5GHZ]; for (i = 0; i < min(band->n_channels, 32); i++) { unsigned long ch_mask_1 = le32_to_cpu(ch_list->ch[1].channels_mask); unsigned long ch_mask_3 = le32_to_cpu(ch_list->ch[3].channels_mask); if (!test_bit(i, &ch_mask_1)) band->channels[i].flags |= IEEE80211_CHAN_DISABLED; if (!test_bit(i, &ch_mask_3)) band->channels[i].flags |= IEEE80211_CHAN_NO_IBSS; } return 0; } static int iwm_ntf_wifi_if_wrapper(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size, struct iwm_wifi_cmd *cmd) { struct iwm_umac_wifi_if *hdr = (struct iwm_umac_wifi_if *)cmd->buf.payload; IWM_DBG_NTF(iwm, DBG, "WIFI_IF_WRAPPER cmd is delivered to UMAC: " "oid is 0x%x\n", hdr->oid); if (hdr->oid <= WIFI_IF_NTFY_MAX) { set_bit(hdr->oid, &iwm->wifi_ntfy[0]); wake_up_interruptible(&iwm->wifi_ntfy_queue); } else return -EINVAL; switch (hdr->oid) { case UMAC_WIFI_IF_CMD_SET_PROFILE: iwm->umac_profile_active = 1; break; default: break; } return 0; } static int iwm_ntf_card_state(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size, struct iwm_wifi_cmd *cmd) { struct wiphy *wiphy = iwm_to_wiphy(iwm); struct iwm_lmac_card_state *state = (struct iwm_lmac_card_state *) (buf + sizeof(struct iwm_umac_wifi_in_hdr)); u32 flags = le32_to_cpu(state->flags); IWM_INFO(iwm, "HW RF Kill %s, CT Kill %s\n", flags & IWM_CARD_STATE_HW_DISABLED ? "ON" : "OFF", flags & IWM_CARD_STATE_CTKILL_DISABLED ? "ON" : "OFF"); wiphy_rfkill_set_hw_state(wiphy, flags & IWM_CARD_STATE_HW_DISABLED); return 0; } static int iwm_rx_handle_wifi(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size) { struct iwm_umac_wifi_in_hdr *wifi_hdr; struct iwm_wifi_cmd *cmd; u8 source, cmd_id; u16 seq_num; u32 count; u8 resp; wifi_hdr = (struct iwm_umac_wifi_in_hdr *)buf; cmd_id = wifi_hdr->sw_hdr.cmd.cmd; source = GET_VAL32(wifi_hdr->hw_hdr.cmd, UMAC_HDI_IN_CMD_SOURCE); if (source >= IWM_SRC_NUM) { IWM_CRIT(iwm, "invalid source %d\n", source); return -EINVAL; } count = (GET_VAL32(wifi_hdr->sw_hdr.meta_data, UMAC_FW_CMD_BYTE_COUNT)); count += sizeof(struct iwm_umac_wifi_in_hdr) - sizeof(struct iwm_dev_cmd_hdr); if (count > buf_size) { IWM_CRIT(iwm, "count %d, buf size:%ld\n", count, buf_size); return -EINVAL; } resp = GET_VAL32(wifi_hdr->sw_hdr.meta_data, UMAC_FW_CMD_STATUS); seq_num = le16_to_cpu(wifi_hdr->sw_hdr.cmd.seq_num); IWM_DBG_RX(iwm, DBG, "CMD:0x%x, source: 0x%x, seqnum: %d\n", cmd_id, source, seq_num); /* * If this is a response to a previously sent command, there must * be a pending command for this sequence number. */ cmd = iwm_get_pending_wifi_cmd(iwm, seq_num); /* Notify the caller only for sync commands. */ switch (source) { case UMAC_HDI_IN_SOURCE_FHRX: if (iwm->lmac_handlers[cmd_id] && test_bit(cmd_id, &iwm->lmac_handler_map[0])) return iwm_notif_send(iwm, cmd, cmd_id, source, buf, count); break; case UMAC_HDI_IN_SOURCE_FW: if (iwm->umac_handlers[cmd_id] && test_bit(cmd_id, &iwm->umac_handler_map[0])) return iwm_notif_send(iwm, cmd, cmd_id, source, buf, count); break; case UMAC_HDI_IN_SOURCE_UDMA: break; } return iwm_rx_handle_resp(iwm, buf, count, cmd); } int iwm_rx_handle_resp(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size, struct iwm_wifi_cmd *cmd) { u8 source, cmd_id; struct iwm_umac_wifi_in_hdr *wifi_hdr; int ret = 0; wifi_hdr = (struct iwm_umac_wifi_in_hdr *)buf; cmd_id = wifi_hdr->sw_hdr.cmd.cmd; source = GET_VAL32(wifi_hdr->hw_hdr.cmd, UMAC_HDI_IN_CMD_SOURCE); IWM_DBG_RX(iwm, DBG, "CMD:0x%x, source: 0x%x\n", cmd_id, source); switch (source) { case UMAC_HDI_IN_SOURCE_FHRX: if (iwm->lmac_handlers[cmd_id]) ret = iwm->lmac_handlers[cmd_id] (iwm, buf, buf_size, cmd); break; case UMAC_HDI_IN_SOURCE_FW: if (iwm->umac_handlers[cmd_id]) ret = iwm->umac_handlers[cmd_id] (iwm, buf, buf_size, cmd); break; case UMAC_HDI_IN_SOURCE_UDMA: ret = -EINVAL; break; } kfree(cmd); return ret; } static int iwm_rx_handle_nonwifi(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size) { u8 seq_num; struct iwm_udma_in_hdr *hdr = (struct iwm_udma_in_hdr *)buf; struct iwm_nonwifi_cmd *cmd, *next; seq_num = GET_VAL32(hdr->cmd, UDMA_HDI_IN_CMD_NON_WIFI_HW_SEQ_NUM); /* * We received a non wifi answer. * Let's check if there's a pending command for it, and if so * replace the command payload with the buffer, and then wake the * callers up. * That means we only support synchronised non wifi command response * schemes. */ list_for_each_entry_safe(cmd, next, &iwm->nonwifi_pending_cmd, pending) if (cmd->seq_num == seq_num) { cmd->resp_received = 1; cmd->buf.len = buf_size; memcpy(cmd->buf.hdr, buf, buf_size); wake_up_interruptible(&iwm->nonwifi_queue); } return 0; } static int iwm_rx_handle_umac(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size) { int ret = 0; u8 op_code; unsigned long buf_offset = 0; struct iwm_udma_in_hdr *hdr; /* * To allow for a more efficient bus usage, UMAC * messages are encapsulated into UDMA ones. This * way we can have several UMAC messages in one bus * transfer. * A UDMA frame size is always aligned on 16 bytes, * and a UDMA frame must not start with a UMAC_PAD_TERMINAL * word. This is how we parse a bus frame into several * UDMA ones. */ while (buf_offset < buf_size) { hdr = (struct iwm_udma_in_hdr *)(buf + buf_offset); if (iwm_rx_check_udma_hdr(hdr) < 0) { IWM_DBG_RX(iwm, DBG, "End of frame\n"); break; } op_code = GET_VAL32(hdr->cmd, UMAC_HDI_IN_CMD_OPCODE); IWM_DBG_RX(iwm, DBG, "Op code: 0x%x\n", op_code); if (op_code == UMAC_HDI_IN_OPCODE_WIFI) { ret |= iwm_rx_handle_wifi(iwm, buf + buf_offset, buf_size - buf_offset); } else if (op_code < UMAC_HDI_IN_OPCODE_NONWIFI_MAX) { if (GET_VAL32(hdr->cmd, UDMA_HDI_IN_CMD_NON_WIFI_HW_SIG) != UDMA_HDI_IN_CMD_NON_WIFI_HW_SIG) { IWM_ERR(iwm, "Incorrect hw signature\n"); return -EINVAL; } ret |= iwm_rx_handle_nonwifi(iwm, buf + buf_offset, buf_size - buf_offset); } else { IWM_ERR(iwm, "Invalid RX opcode: 0x%x\n", op_code); ret |= -EINVAL; } buf_offset += iwm_rx_resp_size(hdr); } return ret; } int iwm_rx_handle(struct iwm_priv *iwm, u8 *buf, unsigned long buf_size) { struct iwm_udma_in_hdr *hdr; hdr = (struct iwm_udma_in_hdr *)buf; switch (le32_to_cpu(hdr->cmd)) { case UMAC_REBOOT_BARKER: return iwm_notif_send(iwm, NULL, IWM_BARKER_REBOOT_NOTIFICATION, IWM_SRC_UDMA, buf, buf_size); case UMAC_ACK_BARKER: return iwm_notif_send(iwm, NULL, IWM_ACK_BARKER_NOTIFICATION, IWM_SRC_UDMA, NULL, 0); default: IWM_DBG_RX(iwm, DBG, "Received cmd: 0x%x\n", hdr->cmd); return iwm_rx_handle_umac(iwm, buf, buf_size); } return 0; } static const iwm_handler iwm_umac_handlers[] = { [UMAC_NOTIFY_OPCODE_ERROR] = iwm_ntf_error, [UMAC_NOTIFY_OPCODE_ALIVE] = iwm_ntf_umac_alive, [UMAC_NOTIFY_OPCODE_INIT_COMPLETE] = iwm_ntf_init_complete, [UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS] = iwm_ntf_wifi_status, [UMAC_NOTIFY_OPCODE_WIFI_IF_WRAPPER] = iwm_ntf_mlme, [UMAC_NOTIFY_OPCODE_PAGE_DEALLOC] = iwm_ntf_tx_credit_update, [UMAC_NOTIFY_OPCODE_RX_TICKET] = iwm_ntf_rx_ticket, [UMAC_CMD_OPCODE_RESET] = iwm_ntf_umac_reset, [UMAC_NOTIFY_OPCODE_STATS] = iwm_ntf_statistics, [UMAC_CMD_OPCODE_EEPROM_PROXY] = iwm_ntf_eeprom_proxy, [UMAC_CMD_OPCODE_GET_CHAN_INFO_LIST] = iwm_ntf_channel_info_list, [REPLY_RX_MPDU_CMD] = iwm_ntf_rx_packet, [UMAC_CMD_OPCODE_WIFI_IF_WRAPPER] = iwm_ntf_wifi_if_wrapper, }; static const iwm_handler iwm_lmac_handlers[] = { [REPLY_TX] = iwm_ntf_tx, [REPLY_ALIVE] = iwm_ntf_lmac_version, [CALIBRATION_RES_NOTIFICATION] = iwm_ntf_calib_res, [CALIBRATION_COMPLETE_NOTIFICATION] = iwm_ntf_calib_complete, [CALIBRATION_CFG_CMD] = iwm_ntf_calib_cfg, [REPLY_RX_MPDU_CMD] = iwm_ntf_rx_packet, [CARD_STATE_NOTIFICATION] = iwm_ntf_card_state, }; void iwm_rx_setup_handlers(struct iwm_priv *iwm) { iwm->umac_handlers = (iwm_handler *) iwm_umac_handlers; iwm->lmac_handlers = (iwm_handler *) iwm_lmac_handlers; } static void iwm_remove_iv(struct sk_buff *skb, u32 hdr_total_len) { struct ieee80211_hdr *hdr; unsigned int hdr_len; hdr = (struct ieee80211_hdr *)skb->data; if (!ieee80211_has_protected(hdr->frame_control)) return; hdr_len = ieee80211_hdrlen(hdr->frame_control); if (hdr_total_len <= hdr_len) return; memmove(skb->data + (hdr_total_len - hdr_len), skb->data, hdr_len); skb_pull(skb, (hdr_total_len - hdr_len)); } static void iwm_rx_adjust_packet(struct iwm_priv *iwm, struct iwm_rx_packet *packet, struct iwm_rx_ticket_node *ticket_node) { u32 payload_offset = 0, payload_len; struct iwm_rx_ticket *ticket = ticket_node->ticket; struct iwm_rx_mpdu_hdr *mpdu_hdr; struct ieee80211_hdr *hdr; mpdu_hdr = (struct iwm_rx_mpdu_hdr *)packet->skb->data; payload_offset += sizeof(struct iwm_rx_mpdu_hdr); /* Padding is 0 or 2 bytes */ payload_len = le16_to_cpu(mpdu_hdr->len) + (le16_to_cpu(ticket->flags) & IWM_RX_TICKET_PAD_SIZE_MSK); payload_len -= ticket->tail_len; IWM_DBG_RX(iwm, DBG, "Packet adjusted, len:%d, offset:%d, " "ticket offset:%d ticket tail len:%d\n", payload_len, payload_offset, ticket->payload_offset, ticket->tail_len); IWM_HEXDUMP(iwm, DBG, RX, "RAW: ", packet->skb->data, packet->skb->len); skb_pull(packet->skb, payload_offset); skb_trim(packet->skb, payload_len); iwm_remove_iv(packet->skb, ticket->payload_offset); hdr = (struct ieee80211_hdr *) packet->skb->data; if (ieee80211_is_data_qos(hdr->frame_control)) { /* UMAC handed QOS_DATA frame with 2 padding bytes appended * to the qos_ctl field in IEEE 802.11 headers. */ memmove(packet->skb->data + IEEE80211_QOS_CTL_LEN + 2, packet->skb->data, ieee80211_hdrlen(hdr->frame_control) - IEEE80211_QOS_CTL_LEN); hdr = (struct ieee80211_hdr *) skb_pull(packet->skb, IEEE80211_QOS_CTL_LEN + 2); hdr->frame_control &= ~cpu_to_le16(IEEE80211_STYPE_QOS_DATA); } IWM_HEXDUMP(iwm, DBG, RX, "ADJUSTED: ", packet->skb->data, packet->skb->len); } static void classify8023(struct sk_buff *skb) { struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; if (ieee80211_is_data_qos(hdr->frame_control)) { u8 *qc = ieee80211_get_qos_ctl(hdr); /* frame has qos control */ skb->priority = *qc & IEEE80211_QOS_CTL_TID_MASK; } else { skb->priority = 0; } } static void iwm_rx_process_packet(struct iwm_priv *iwm, struct iwm_rx_packet *packet, struct iwm_rx_ticket_node *ticket_node) { int ret; struct sk_buff *skb = packet->skb; struct wireless_dev *wdev = iwm_to_wdev(iwm); struct net_device *ndev = iwm_to_ndev(iwm); IWM_DBG_RX(iwm, DBG, "Processing packet ID %d\n", packet->id); switch (le16_to_cpu(ticket_node->ticket->action)) { case IWM_RX_TICKET_RELEASE: IWM_DBG_RX(iwm, DBG, "RELEASE packet\n"); classify8023(skb); iwm_rx_adjust_packet(iwm, packet, ticket_node); ret = ieee80211_data_to_8023(skb, ndev->dev_addr, wdev->iftype); if (ret < 0) { IWM_DBG_RX(iwm, DBG, "Couldn't convert 802.11 header - " "%d\n", ret); break; } IWM_HEXDUMP(iwm, DBG, RX, "802.3: ", skb->data, skb->len); skb->dev = iwm_to_ndev(iwm); skb->protocol = eth_type_trans(skb, ndev); skb->ip_summed = CHECKSUM_NONE; memset(skb->cb, 0, sizeof(skb->cb)); ndev->stats.rx_packets++; ndev->stats.rx_bytes += skb->len; if (netif_rx_ni(skb) == NET_RX_DROP) { IWM_ERR(iwm, "Packet dropped\n"); ndev->stats.rx_dropped++; } break; case IWM_RX_TICKET_DROP: IWM_DBG_RX(iwm, DBG, "DROP packet\n"); kfree_skb(packet->skb); break; default: IWM_ERR(iwm, "Unknow ticket action: %d\n", le16_to_cpu(ticket_node->ticket->action)); kfree_skb(packet->skb); } kfree(packet); iwm_rx_ticket_node_free(ticket_node); } /* * Rx data processing: * * We're receiving Rx packet from the LMAC, and Rx ticket from * the UMAC. * To forward a target data packet upstream (i.e. to the * kernel network stack), we must have received an Rx ticket * that tells us we're allowed to release this packet (ticket * action is IWM_RX_TICKET_RELEASE). The Rx ticket also indicates, * among other things, where valid data actually starts in the Rx * packet. */ void iwm_rx_worker(struct work_struct *work) { struct iwm_priv *iwm; struct iwm_rx_ticket_node *ticket, *next; iwm = container_of(work, struct iwm_priv, rx_worker); /* * We go through the tickets list and if there is a pending * packet for it, we push it upstream. * We stop whenever a ticket is missing its packet, as we're * supposed to send the packets in order. */ list_for_each_entry_safe(ticket, next, &iwm->rx_tickets, node) { struct iwm_rx_packet *packet = iwm_rx_packet_get(iwm, le16_to_cpu(ticket->ticket->id)); if (!packet) { IWM_DBG_RX(iwm, DBG, "Skip rx_work: Wait for ticket %d " "to be handled first\n", le16_to_cpu(ticket->ticket->id)); return; } list_del(&ticket->node); list_del(&packet->node); iwm_rx_process_packet(iwm, packet, ticket); } }