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linux/drivers/net/wireless/iwmc3200wifi/rx.c

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/*
* 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/sched.h>
#include <linux/etherdevice.h>
#include <linux/wireless.h>
#include <linux/ieee80211.h>
#include <linux/if_arp.h>
#include <linux/list.h>
#include <linux/slab.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;
memcpy(iwm->last_fw_err, fw_err, sizeof(struct iwm_fw_error_hdr));
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));
iwm_resetting(iwm);
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 = kmemdup(ticket, 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);
}
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 iwm_rx_packet *packet;
spin_lock(&iwm->packet_lock[id_hash]);
list_for_each_entry(packet, &iwm->rx_packets[id_hash], node)
if (packet->id == id) {
list_del(&packet->node);
spin_unlock(&iwm->packet_lock[id_hash]);
return packet;
}
spin_unlock(&iwm->packet_lock[id_hash]);
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;
spin_lock(&iwm->ticket_lock);
list_for_each_entry_safe(ticket, nt, &iwm->rx_tickets, node) {
list_del(&ticket->node);
iwm_rx_ticket_node_free(ticket);
}
spin_unlock(&iwm->ticket_lock);
for (i = 0; i < IWM_RX_ID_HASH; i++) {
spin_lock(&iwm->packet_lock[i]);
list_for_each_entry_safe(packet, np, &iwm->rx_packets[i],
node) {
list_del(&packet->node);
kfree_skb(packet->skb);
kfree(packet);
}
spin_unlock(&iwm->packet_lock[i]);
}
}
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 %s(%d)\n",
__le16_to_cpu(ticket->action) ==
IWM_RX_TICKET_RELEASE ?
"RELEASE" : "DROP",
ticket->id);
spin_lock(&iwm->ticket_lock);
list_add_tail(&ticket_node->node, &iwm->rx_tickets);
spin_unlock(&iwm->ticket_lock);
/*
* 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;
u8 id_hash;
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);
id_hash = IWM_RX_ID_GET_HASH(id);
spin_lock(&iwm->packet_lock[id_hash]);
list_add_tail(&packet->node, &iwm->rx_packets[id_hash]);
spin_unlock(&iwm->packet_lock[id_hash]);
/* 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;
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 u8 iwm_is_open_wep_profile(struct iwm_priv *iwm)
{
if ((iwm->umac_profile->sec.ucast_cipher == UMAC_CIPHER_TYPE_WEP_40 ||
iwm->umac_profile->sec.ucast_cipher == UMAC_CIPHER_TYPE_WEP_104) &&
(iwm->umac_profile->sec.ucast_cipher ==
iwm->umac_profile->sec.mcast_cipher) &&
(iwm->umac_profile->sec.auth_type == UMAC_AUTH_TYPE_OPEN))
return 1;
return 0;
}
static int iwm_mlme_assoc_complete(struct iwm_priv *iwm, u8 *buf,
unsigned long buf_size,
struct iwm_wifi_cmd *cmd)
{
struct wiphy *wiphy = iwm_to_wiphy(iwm);
struct ieee80211_channel *chan;
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);
switch (le32_to_cpu(complete->status)) {
case UMAC_ASSOC_COMPLETE_SUCCESS:
chan = ieee80211_get_channel(wiphy,
ieee80211_channel_to_frequency(complete->channel));
if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
/* Associated to a unallowed channel, disassociate. */
__iwm_invalidate_mlme_profile(iwm);
IWM_WARN(iwm, "Couldn't associate with %pM due to "
"channel %d is disabled. Check your local "
"regulatory setting.\n",
complete->bssid, complete->channel);
goto failure;
}
set_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
memcpy(iwm->bssid, complete->bssid, ETH_ALEN);
iwm->channel = complete->channel;
/* Internal roaming state, avoid notifying SME. */
if (!test_and_clear_bit(IWM_STATUS_SME_CONNECTING, &iwm->status)
&& iwm->conf.mode == UMAC_MODE_BSS) {
cancel_delayed_work(&iwm->disconnect);
cfg80211_roamed(iwm_to_ndev(iwm),
complete->bssid,
iwm->req_ie, iwm->req_ie_len,
iwm->resp_ie, iwm->resp_ie_len,
GFP_KERNEL);
break;
}
iwm_link_on(iwm);
if (iwm->conf.mode == UMAC_MODE_IBSS)
goto ibss;
if (!test_bit(IWM_STATUS_RESETTING, &iwm->status))
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);
else
cfg80211_roamed(iwm_to_ndev(iwm),
complete->bssid,
iwm->req_ie, iwm->req_ie_len,
iwm->resp_ie, iwm->resp_ie_len,
GFP_KERNEL);
break;
case UMAC_ASSOC_COMPLETE_FAILURE:
failure:
clear_bit(IWM_STATUS_ASSOCIATED, &iwm->status);
memset(iwm->bssid, 0, ETH_ALEN);
iwm->channel = 0;
/* Internal roaming state, avoid notifying SME. */
if (!test_and_clear_bit(IWM_STATUS_SME_CONNECTING, &iwm->status)
&& iwm->conf.mode == UMAC_MODE_BSS) {
cancel_delayed_work(&iwm->disconnect);
break;
}
iwm_link_off(iwm);
if (iwm->conf.mode == UMAC_MODE_IBSS)
goto ibss;
if (!test_bit(IWM_STATUS_RESETTING, &iwm->status))
if (!iwm_is_open_wep_profile(iwm)) {
cfg80211_connect_result(iwm_to_ndev(iwm),
complete->bssid,
NULL, 0, NULL, 0,
WLAN_STATUS_UNSPECIFIED_FAILURE,
GFP_KERNEL);
} else {
/* Let's try shared WEP auth */
IWM_ERR(iwm, "Trying WEP shared auth\n");
schedule_work(&iwm->auth_retry_worker);
}
else
cfg80211_disconnected(iwm_to_ndev(iwm), 0, NULL, 0,
GFP_KERNEL);
break;
default:
break;
}
clear_bit(IWM_STATUS_RESETTING, &iwm->status);
return 0;
ibss:
cfg80211_ibss_joined(iwm_to_ndev(iwm), iwm->bssid, GFP_KERNEL);
clear_bit(IWM_STATUS_RESETTING, &iwm->status);
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;
u32 reason;
invalid = (struct iwm_umac_notif_profile_invalidate *)buf;
reason = le32_to_cpu(invalid->reason);
IWM_DBG_MLME(iwm, INFO, "Profile Invalidated. Reason: %d\n", reason);
if (reason != UMAC_PROFILE_INVALID_REQUEST &&
test_bit(IWM_STATUS_SME_CONNECTING, &iwm->status))
cfg80211_connect_result(iwm_to_ndev(iwm), NULL, NULL, 0, NULL,
0, WLAN_STATUS_UNSPECIFIED_FAILURE,
GFP_KERNEL);
clear_bit(IWM_STATUS_SME_CONNECTING, &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;
}
#define IWM_DISCONNECT_INTERVAL (5 * HZ)
static int iwm_mlme_connection_terminated(struct iwm_priv *iwm, u8 *buf,
unsigned long buf_size,
struct iwm_wifi_cmd *cmd)
{
IWM_DBG_MLME(iwm, DBG, "Connection terminated\n");
schedule_delayed_work(&iwm->disconnect, IWM_DISCONNECT_INTERVAL);
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_medium_lost(struct iwm_priv *iwm, u8 *buf,
unsigned long buf_size,
struct iwm_wifi_cmd *cmd)
{
struct wiphy *wiphy = iwm_to_wiphy(iwm);
IWM_DBG_NTF(iwm, DBG, "WiFi/WiMax coexistence radio is OFF\n");
wiphy_rfkill_set_hw_state(wiphy, true);
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;
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(bss, &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->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;
IWM_HEXDUMP(iwm, DBG, MLME, "MGT: ", mgt_frame->frame,
le16_to_cpu(mgt_frame->len));
if (ieee80211_is_assoc_req(mgt->frame_control)) {
iwm->req_ie_len = le16_to_cpu(mgt_frame->len)
- offsetof(struct ieee80211_mgmt,
u.assoc_req.variable);
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)) {
iwm->req_ie_len = le16_to_cpu(mgt_frame->len)
- offsetof(struct ieee80211_mgmt,
u.reassoc_req.variable);
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)) {
iwm->resp_ie_len = le16_to_cpu(mgt_frame->len)
- offsetof(struct ieee80211_mgmt,
u.assoc_resp.variable);
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)) {
iwm->resp_ie_len = le16_to_cpu(mgt_frame->len)
- offsetof(struct ieee80211_mgmt,
u.reassoc_resp.variable);
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: 0x%x",
le16_to_cpu(mgt->frame_control));
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:
return iwm_mlme_connection_terminated(iwm, buf, buf_size, cmd);
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_RADIO_PREEMPTION:
return iwm_mlme_medium_lost(iwm, buf, buf_size, cmd);
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_stop_resume_tx(struct iwm_priv *iwm, u8 *buf,
unsigned long buf_size,
struct iwm_wifi_cmd *cmd)
{
struct iwm_umac_notif_stop_resume_tx *stp_res_tx =
(struct iwm_umac_notif_stop_resume_tx *)buf;
struct iwm_sta_info *sta_info;
struct iwm_tid_info *tid_info;
u8 sta_id = STA_ID_N_COLOR_ID(stp_res_tx->sta_id);
u16 tid_msk = le16_to_cpu(stp_res_tx->stop_resume_tid_msk);
int bit, ret = 0;
bool stop = false;
IWM_DBG_NTF(iwm, DBG, "stop/resume notification:\n"
"\tflags: 0x%x\n"
"\tSTA id: %d\n"
"\tTID bitmask: 0x%x\n",
stp_res_tx->flags, stp_res_tx->sta_id,
stp_res_tx->stop_resume_tid_msk);
if (stp_res_tx->flags & UMAC_STOP_TX_FLAG)
stop = true;
sta_info = &iwm->sta_table[sta_id];
if (!sta_info->valid) {
IWM_ERR(iwm, "Stoping an invalid STA: %d %d\n",
sta_id, stp_res_tx->sta_id);
return -EINVAL;
}
for_each_set_bit(bit, (unsigned long *)&tid_msk, IWM_UMAC_TID_NR) {
tid_info = &sta_info->tid_info[bit];
mutex_lock(&tid_info->mutex);
tid_info->stopped = stop;
mutex_unlock(&tid_info->mutex);
if (!stop) {
struct iwm_tx_queue *txq;
int queue = iwm_tid_to_queue(bit);
if (queue < 0)
continue;
txq = &iwm->txq[queue];
/*
* If we resume, we have to move our SKBs
* back to the tx queue and queue some work.
*/
spin_lock_bh(&txq->lock);
skb_queue_splice_init(&txq->queue, &txq->stopped_queue);
spin_unlock_bh(&txq->lock);
queue_work(txq->wq, &txq->worker);
}
}
/* We send an ACK only for the stop case */
if (stop)
ret = iwm_send_umac_stop_resume_tx(iwm, stp_res_tx);
return ret;
}
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;
if (cmd == NULL) {
IWM_ERR(iwm, "Couldn't find expected wifi command\n");
return -EINVAL;
}
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);
set_bit(hdr->oid, &iwm->wifi_ntfy[0]);
wake_up_interruptible(&iwm->wifi_ntfy_queue);
switch (hdr->oid) {
case UMAC_WIFI_IF_CMD_SET_PROFILE:
iwm->umac_profile_active = 1;
break;
default:
break;
}
return 0;
}
#define CT_KILL_DELAY (30 * HZ)
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");
if (flags & IWM_CARD_STATE_CTKILL_DISABLED) {
/*
* We got a CTKILL event: We bring the interface down in
* oder to cool the device down, and try to bring it up
* 30 seconds later. If it's still too hot, we'll go through
* this code path again.
*/
cancel_delayed_work_sync(&iwm->ct_kill_delay);
schedule_delayed_work(&iwm->ct_kill_delay, CT_KILL_DELAY);
}
wiphy_rfkill_set_hw_state(wiphy, flags &
(IWM_CARD_STATE_HW_DISABLED |
IWM_CARD_STATE_CTKILL_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;
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;
}
if (cmd_id == REPLY_RX_MPDU_CMD)
trace_iwm_rx_packet(iwm, buf, buf_size);
else if ((cmd_id == UMAC_NOTIFY_OPCODE_RX_TICKET) &&
(source == UMAC_HDI_IN_SOURCE_FW))
trace_iwm_rx_ticket(iwm, buf, buf_size);
else
trace_iwm_rx_wifi_cmd(iwm, wifi_hdr);
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;
}
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;
trace_iwm_rx_nonwifi_cmd(iwm, buf, buf_size);
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(cmd, &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:
if (test_bit(IWM_STATUS_READY, &iwm->status)) {
IWM_ERR(iwm, "Unexpected BARKER\n");
schedule_work(&iwm->reset_worker);
return 0;
}
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,
[UMAC_CMD_OPCODE_STOP_RESUME_STA_TX] = iwm_ntf_stop_resume_tx,
[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_amsdu(struct iwm_priv *iwm, struct sk_buff *skb)
{
struct wireless_dev *wdev = iwm_to_wdev(iwm);
struct net_device *ndev = iwm_to_ndev(iwm);
struct sk_buff_head list;
struct sk_buff *frame;
IWM_HEXDUMP(iwm, DBG, RX, "A-MSDU: ", skb->data, skb->len);
__skb_queue_head_init(&list);
ieee80211_amsdu_to_8023s(skb, &list, ndev->dev_addr, wdev->iftype, 0);
while ((frame = __skb_dequeue(&list))) {
ndev->stats.rx_packets++;
ndev->stats.rx_bytes += frame->len;
frame->protocol = eth_type_trans(frame, ndev);
frame->ip_summed = CHECKSUM_NONE;
memset(frame->cb, 0, sizeof(frame->cb));
if (netif_rx_ni(frame) == NET_RX_DROP) {
IWM_ERR(iwm, "Packet dropped\n");
ndev->stats.rx_dropped++;
}
}
}
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");
iwm_rx_adjust_packet(iwm, packet, ticket_node);
skb->dev = iwm_to_ndev(iwm);
classify8023(skb);
if (le16_to_cpu(ticket_node->ticket->flags) &
IWM_RX_TICKET_AMSDU_MSK) {
iwm_rx_process_amsdu(iwm, skb);
break;
}
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);
kfree_skb(packet->skb);
break;
}
IWM_HEXDUMP(iwm, DBG, RX, "802.3: ", skb->data, skb->len);
ndev->stats.rx_packets++;
ndev->stats.rx_bytes += skb->len;
skb->protocol = eth_type_trans(skb, ndev);
skb->ip_summed = CHECKSUM_NONE;
memset(skb->cb, 0, sizeof(skb->cb));
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: 0x%x\n",
le16_to_cpu(ticket_node->ticket->flags));
kfree_skb(packet->skb);
break;
default:
IWM_ERR(iwm, "Unknown 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.
*/
spin_lock(&iwm->ticket_lock);
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));
break;
}
list_del(&ticket->node);
iwm_rx_process_packet(iwm, packet, ticket);
}
spin_unlock(&iwm->ticket_lock);
}
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