diff options
Diffstat (limited to 'drivers/net/wireless/iwmc3200wifi/rx.c')
| -rw-r--r-- | drivers/net/wireless/iwmc3200wifi/rx.c | 1431 |
1 files changed, 1431 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwmc3200wifi/rx.c b/drivers/net/wireless/iwmc3200wifi/rx.c new file mode 100644 index 000000000000..d73cf96c6dc6 --- /dev/null +++ b/drivers/net/wireless/iwmc3200wifi/rx.c @@ -0,0 +1,1431 @@ +/* + * 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 <ilw@linux.intel.com> + * Samuel Ortiz <samuel.ortiz@intel.com> + * Zhu Yi <yi.zhu@intel.com> + * + */ + +#include <linux/kernel.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/wireless.h> +#include <linux/ieee80211.h> +#include <linux/if_arp.h> +#include <linux/list.h> +#include <net/iw_handler.h> + +#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 iwm_umac_notif_init_complete *init_complete = + (struct iwm_umac_notif_init_complete *)(buf); + u16 status = le16_to_cpu(init_complete->status); + + if (status == UMAC_NTFY_INIT_COMPLETE_STATUS_ERR) { + IWM_DBG_NTF(iwm, DBG, "Hardware rf kill is on (radio off)\n"); + set_bit(IWM_RADIO_RFKILL_HW, &iwm->radio); + } else { + IWM_DBG_NTF(iwm, DBG, "Hardware rf kill is off (radio on)\n"); + clear_bit(IWM_RADIO_RFKILL_HW, &iwm->radio); + } + + 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_NTF(iwm, DBG, "REPLY_TX, buf size: %lu\n", buf_size); + + IWM_DBG_NTF(iwm, DBG, "Seqnum: %d\n", + le16_to_cpu(hdr->sw_hdr.cmd.seq_num)); + IWM_DBG_NTF(iwm, DBG, "\tFrame cnt: %d\n", tx_resp->frame_cnt); + IWM_DBG_NTF(iwm, DBG, "\tRetry cnt: %d\n", + le16_to_cpu(tx_resp->retry_cnt)); + IWM_DBG_NTF(iwm, DBG, "\tSeq ctl: %d\n", le16_to_cpu(tx_resp->seq_ctl)); + IWM_DBG_NTF(iwm, DBG, "\tByte cnt: %d\n", + le16_to_cpu(tx_resp->byte_cnt)); + IWM_DBG_NTF(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_NTF(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_NTF(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_NTF(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; + union iwreq_data wrqu; + + IWM_DBG_MLME(iwm, INFO, "Association with %pM completed, status: %d\n", + complete->bssid, complete->status); + + memset(&wrqu, 0, sizeof(wrqu)); + + 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); + + memcpy(wrqu.ap_addr.sa_data, complete->bssid, ETH_ALEN); + 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); + default: + break; + } + + if (iwm->conf.mode == UMAC_MODE_IBSS) { + cfg80211_ibss_joined(iwm_to_ndev(iwm), iwm->bssid, GFP_KERNEL); + return 0; + } + + wrqu.ap_addr.sa_family = ARPHRD_ETHER; + wireless_send_event(iwm_to_ndev(iwm), SIOCGIWAP, &wrqu, NULL); + + 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; + unsigned int event; + union iwreq_data wrqu; + + 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;; + event = IWEVASSOCREQIE; + } else if (ieee80211_is_reassoc_req(mgt->frame_control)) { + ie = mgt->u.reassoc_req.variable;; + event = IWEVASSOCREQIE; + } else if (ieee80211_is_assoc_resp(mgt->frame_control)) { + ie = mgt->u.assoc_resp.variable;; + event = IWEVASSOCRESPIE; + } else if (ieee80211_is_reassoc_resp(mgt->frame_control)) { + ie = mgt->u.reassoc_resp.variable;; + event = IWEVASSOCRESPIE; + } else { + IWM_ERR(iwm, "Unsupported management frame"); + return 0; + } + + wrqu.data.length = le16_to_cpu(mgt_frame->len) - (ie - (u8 *)mgt); + + IWM_HEXDUMP(iwm, DBG, MLME, "EVT: ", ie, wrqu.data.length); + wireless_send_event(iwm_to_ndev(iwm), event, &wrqu, ie); + + 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; + } + + 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; + +#ifdef CONFIG_IWM_B0_HW_SUPPORT + if (hdr_offset == IWM_EEPROM_SKU_CAP_OFF) { + if (eeprom_proxy->buf[0] == 0xff) + iwm->conf.hw_b0 = 1; + } +#endif + + 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 %d\n", hdr->oid); + + switch (hdr->oid) { + case UMAC_WIFI_IF_CMD_SET_PROFILE: + iwm->umac_profile_active = 1; + wake_up_interruptible(&iwm->mlme_queue); + 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 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"); + + if (flags & IWM_CARD_STATE_HW_DISABLED) + set_bit(IWM_RADIO_RFKILL_HW, &iwm->radio); + else + clear_bit(IWM_RADIO_RFKILL_HW, &iwm->radio); + + 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_UNNECESSARY; + memset(skb->cb, 0, sizeof(skb->cb)); + + ndev->stats.rx_packets++; + ndev->stats.rx_bytes += skb->len; + + if (netif_rx(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); + } +} + |