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fuchsia / drivers / wlan / intel / iwlwifi / e14bff8f02c9b2bd8c5514affe995ee678cf1c24 / . / third_party / iwlwifi / mvm / tx.c
blob: 701ab448d78f106e618c89c1dc18d1584ceb8244 [file] [log] [blame]
/******************************************************************************
*
* Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
* Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
* Copyright(c) 2016 - 2017 Intel Deutschland GmbH
* Copyright(c) 2018 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 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.
*
*****************************************************************************/
#include "third_party/iwlwifi/iwl-eeprom-parse.h"
#include "third_party/iwlwifi/iwl-trans.h"
#include "third_party/iwlwifi/mvm/mvm.h"
#include "third_party/iwlwifi/mvm/sta.h"
#include "third_party/iwlwifi/platform/ieee80211_include.h"
#include "third_party/iwlwifi/platform/kernel.h"
#if 0 // NEEDS_PORTING
static void iwl_mvm_bar_check_trigger(struct iwl_mvm* mvm, const uint8_t* addr, uint16_t tid,
uint16_t ssn) {
struct iwl_fw_dbg_trigger_tlv* trig;
struct iwl_fw_dbg_trigger_ba* ba_trig;
trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_BA);
if (!trig) { return; }
ba_trig = (void*)trig->data;
if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid))) { return; }
iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, "BAR sent to %pM, tid %d, ssn %d", addr, tid, ssn);
}
#define OPT_HDR(type, skb, off) (type*)(skb_network_header(skb) + (off))
static uint16_t iwl_mvm_tx_csum(struct iwl_mvm* mvm, struct sk_buff* skb, struct ieee80211_hdr* hdr,
struct ieee80211_tx_info* info, uint16_t offload_assist) {
#if IS_ENABLED(CONFIG_INET)
uint16_t mh_len = ieee80211_get_header_len(hdr->frame_control);
uint8_t protocol = 0;
/*
* Do not compute checksum if already computed or if transport will
* compute it
*/
if (skb->ip_summed != CHECKSUM_PARTIAL || IWL_MVM_SW_TX_CSUM_OFFLOAD) { goto out; }
/* We do not expect to be requested to csum stuff we do not support */
if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) ||
(skb->protocol != htons(ETH_P_IP) && skb->protocol != htons(ETH_P_IPV6)),
"No support for requested checksum\n")) {
skb_checksum_help(skb);
goto out;
}
if (skb->protocol == htons(ETH_P_IP)) {
protocol = ip_hdr(skb)->protocol;
} else {
#if IS_ENABLED(CONFIG_IPV6)
struct ipv6hdr* ipv6h = (struct ipv6hdr*)skb_network_header(skb);
unsigned int off = sizeof(*ipv6h);
protocol = ipv6h->nexthdr;
while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) {
struct ipv6_opt_hdr* hp;
/* only supported extension headers */
if (protocol != NEXTHDR_ROUTING && protocol != NEXTHDR_HOP &&
protocol != NEXTHDR_DEST) {
skb_checksum_help(skb);
goto out;
}
hp = OPT_HDR(struct ipv6_opt_hdr, skb, off);
protocol = hp->nexthdr;
off += ipv6_optlen(hp);
}
/* if we get here - protocol now should be TCP/UDP */
#endif
}
if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) {
WARN_ON_ONCE(1);
skb_checksum_help(skb);
goto out;
}
/* enable L4 csum */
offload_assist |= BIT(TX_CMD_OFFLD_L4_EN);
/*
* Set offset to IP header (snap).
* We don't support tunneling so no need to take care of inner header.
* Size is in words.
*/
offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR);
/* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */
if (skb->protocol == htons(ETH_P_IP) && (offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) {
ip_hdr(skb)->check = 0;
offload_assist |= BIT(TX_CMD_OFFLD_L3_EN);
}
/* reset UDP/TCP header csum */
if (protocol == IPPROTO_TCP) {
tcp_hdr(skb)->check = 0;
} else {
udp_hdr(skb)->check = 0;
}
/*
* mac header len should include IV, size is in words unless
* the IV is added by the firmware like in WEP.
* In new Tx API, the IV is always added by the firmware.
*/
if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key &&
info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 &&
info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104) {
mh_len += info->control.hw_key->iv_len;
}
mh_len /= 2;
offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE;
out:
#endif
return offload_assist;
}
#endif // NEEDS_PORTING
/*
* Sets most of the Tx cmd's fields
*/
void iwl_mvm_set_tx_cmd(struct iwl_mvm* mvm, struct ieee80211_mac_packet* pkt,
struct iwl_tx_cmd* tx_cmd, uint8_t sta_id) {
uint32_t tx_flags = le32_to_cpu(tx_cmd->tx_flags);
tx_flags |= TX_CMD_FLG_SEQ_CTL;
tx_flags |= TX_CMD_FLG_BT_DIS;
tx_flags |= TX_CMD_FLG_ACK;
tx_cmd->tid_tspec = IWL_MAX_TID_COUNT;
// TODO(51120): below code needs rewrite to support QoS.
#if 0 // NEEDS_PORTING
struct ieee80211_hdr* hdr = (void*)skb->data;
__le16 fc = hdr->frame_control;
uint32_t tx_flags = le32_to_cpu(tx_cmd->tx_flags);
uint32_t len = skb->len + FCS_LEN;
uint16_t offload_assist = 0;
uint8_t ac;
if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
tx_flags |= TX_CMD_FLG_ACK;
} else {
tx_flags &= ~TX_CMD_FLG_ACK;
}
if (ieee80211_is_probe_resp(fc)) { tx_flags |= TX_CMD_FLG_TSF; }
if (ieee80211_has_morefrags(fc)) { tx_flags |= TX_CMD_FLG_MORE_FRAG; }
if (ieee80211_is_data_qos(fc)) {
uint8_t* qc = ieee80211_get_qos_ctl(hdr);
tx_cmd->tid_tspec = qc[0] & 0xf;
tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) { offload_assist |= BIT(TX_CMD_OFFLD_AMSDU); }
} else if (ieee80211_is_back_req(fc)) {
struct ieee80211_bar* bar = (void*)skb->data;
uint16_t control = le16_to_cpu(bar->control);
uint16_t ssn = le16_to_cpu(bar->start_seq_num);
tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
tx_cmd->tid_tspec =
(control & IEEE80211_BAR_CTRL_TID_INFO_MASK) >> IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT);
iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec, ssn);
} else {
if (ieee80211_is_data(fc)) {
tx_cmd->tid_tspec = IWL_TID_NON_QOS;
} else {
tx_cmd->tid_tspec = IWL_MAX_TID_COUNT;
}
if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
tx_flags |= TX_CMD_FLG_SEQ_CTL;
} else {
tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
}
}
/* Default to 0 (BE) when tid_spec is set to IWL_MAX_TID_COUNT */
if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT) {
ac = tid_to_mac80211_ac[tx_cmd->tid_tspec];
} else {
ac = tid_to_mac80211_ac[0];
}
tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) << TX_CMD_FLG_BT_PRIO_POS;
if (ieee80211_is_mgmt(fc)) {
if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) {
tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC);
} else if (ieee80211_is_action(fc)) {
tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
} else {
tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
}
/* The spec allows Action frames in A-MPDU, we don't support
* it
*/
WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
} else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
} else {
tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
}
if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
!is_multicast_ether_addr(ieee80211_get_DA(hdr))) {
tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
}
if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) &&
ieee80211_action_contains_tpc(skb)) {
tx_flags |= TX_CMD_FLG_WRITE_TX_POWER;
}
#endif // NEEDS_PORTING
tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
tx_cmd->tx_flags = cpu_to_le32(tx_flags);
/* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */
tx_cmd->len = cpu_to_le16(pkt->header_size + pkt->headroom_used_size + pkt->body_size);
tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
tx_cmd->sta_id = sta_id;
#if 0 // NEEDS_PORTING
/* padding is inserted later in transport */
if (ieee80211_get_header_len(fc) % 4 && !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) {
offload_assist |= BIT(TX_CMD_OFFLD_PAD);
}
tx_cmd->offload_assist |= cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, hdr, info, offload_assist));
#endif // NEEDS_PORTING
}
#if 0 // NEEDS_PORTING
static uint32_t iwl_mvm_get_tx_ant(struct iwl_mvm* mvm) {
// TODO(fxbug.dev/91465): Configure the ANT bit.
if (info->band == NL80211_BAND_2GHZ && !iwl_mvm_bt_coex_is_shared_ant_avail(mvm)) {
return mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS;
}
if (sta && ieee80211_is_data(fc)) {
struct iwl_mvm_sta* mvmsta = iwl_mvm_sta_from_mac80211(sta);
return BIT(mvmsta->tx_ant) << RATE_MCS_ANT_POS;
}
return BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
}
static uint32_t iwl_mvm_get_tx_rate(struct iwl_mvm* mvm) {
int rate_idx;
uint8_t rate_plcp;
uint32_t rate_flags = 0;
/* HT rate doesn't make sense for a non data frame */
WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
"Got an HT rate (flags:0x%x/mcs:%d) for a non data frame\n",
info->control.rates[0].flags, info->control.rates[0].idx);
rate_idx = info->control.rates[0].idx;
/* if the rate isn't a well known legacy rate, take the lowest one */
if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY) {
rate_idx = rate_lowest_index(&mvm->nvm_data->bands[info->band], sta);
}
/* For 5 GHZ band, remap mac80211 rate indices into driver indices */
if (info->band == NL80211_BAND_5GHZ) { rate_idx += IWL_FIRST_OFDM_RATE; }
#ifdef CPTCFG_IWLWIFI_FORCE_OFDM_RATE
/* Force OFDM on each TX packet */
rate_idx = IWL_FIRST_OFDM_RATE;
#endif
/* For 2.4 GHZ band, check that there is no need to remap */
BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
/* Get PLCP rate for tx_cmd->rate_n_flags */
rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);
/* Set CCK flag as needed */
if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) {
rate_flags |= RATE_MCS_CCK_MSK;
}
return (uint32_t)rate_plcp | rate_flags;
}
static uint32_t iwl_mvm_get_tx_rate_n_flags(struct iwl_mvm* mvm, struct ieee80211_tx_info* info,
struct ieee80211_sta* sta, __le16 fc) {
return iwl_mvm_get_tx_rate(mvm, info, sta) | iwl_mvm_get_tx_ant(mvm, info, sta, fc);
}
#endif // NEEDS_PORTING
/*
* Sets the fields in the Tx cmd that are rate related
*/
void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm* mvm, struct iwl_tx_cmd* tx_cmd,
const struct ieee80211_frame_header* hdr) {
/* Set retry limit on RTS packets */
tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
/* Set retry limit on DATA packets and Probe Responses*/
tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
#if 1 // NEEDS_PORTING
// Return in advance if it's a data frame(except EAPOL frame), the rate of data frame is
// controlled by LINK_QUALITY command.
if (hdr != NULL && ieee80211_is_data(hdr) &&
mvm->fw_id_to_mac_id[0]->sta_state >= IWL_STA_AUTHORIZED) {
tx_cmd->initial_rate_index = 0;
tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
return;
}
tx_cmd->rate_n_flags = iwl_mvm_mac80211_idx_to_hwrate(IWL_FIRST_OFDM_RATE) |
(BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS);
#else // NEEDS_PORTING
// TODO(51120): below code needs rewrite to support QoS.
/* Set retry limit on DATA packets and Probe Responses*/
if (ieee80211_is_probe_resp(fc)) {
tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
tx_cmd->rts_retry_limit = min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
} else if (ieee80211_is_back_req(fc)) {
tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
} else {
tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
}
/*
* for data packets, rate info comes from the table inside the fw. This
* table is controlled by LINK_QUALITY commands
*/
#ifndef CPTCFG_IWLWIFI_FORCE_OFDM_RATE
if (ieee80211_is_data(fc) && sta) {
struct iwl_mvm_sta* mvmsta = iwl_mvm_sta_from_mac80211(sta);
if (mvmsta->sta_state >= IEEE80211_STA_AUTHORIZED) {
tx_cmd->initial_rate_index = 0;
tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
return;
}
} else if (ieee80211_is_back_req(fc)) {
tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
}
#else
if (ieee80211_is_back_req(fc)) {
tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
}
#endif
/* Set the rate in the TX cmd */
tx_cmd->rate_n_flags = cpu_to_le32(iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, fc));
#endif // NEEDS_PORTING
}
static void iwl_mvm_set_tx_cmd_pn(struct ieee80211_key_conf* keyconf, uint8_t* ccmp_hdr) {
uint64_t pn = atomic64_inc_return(&keyconf->tx_pn);
ccmp_hdr[0] = pn;
ccmp_hdr[2] = 0;
ccmp_hdr[3] = 0x20 | (keyconf->keyidx << 6);
ccmp_hdr[1] = pn >> 8;
ccmp_hdr[4] = pn >> 16;
ccmp_hdr[5] = pn >> 24;
ccmp_hdr[6] = pn >> 32;
ccmp_hdr[7] = pn >> 40;
}
/*
* Sets the fields in the Tx cmd that are crypto related
*/
static zx_status_t iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm* mvm, struct ieee80211_tx_info* info,
struct iwl_tx_cmd* tx_cmd,
struct ieee80211_mac_packet* pkt) {
struct ieee80211_key_conf* key_conf = info->control.hw_key;
switch (key_conf->cipher) {
case CIPHER_SUITE_TYPE_CCMP_128:
// Insert the CCMP header into the headroom space.
if (sizeof(pkt->headroom) - pkt->headroom_used_size < 8) {
return ZX_ERR_NO_SPACE;
}
iwl_mvm_set_tx_cmd_ccmp(key_conf, tx_cmd);
iwl_mvm_set_tx_cmd_pn(key_conf, pkt->headroom + pkt->headroom_used_size);
tx_cmd->len += 8;
pkt->headroom_used_size += 8;
break;
default:
tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
}
return ZX_OK;
}
/*
* Allocates and sets the Tx cmd the driver data pointers in the skb
*
* An 'struct iwl_device_cmd' instance is passed in 'dev_cmd' as input. It also stores the output of
* this function.
*
* Note that the 'struct iwl_device_cmd' includes two parts: the header and the payload. The header
* size is fixed, while the *actual* payload is variable, which depends on the command type and in
* this case it is sizeof(stuct iwl_tx_cmd). Also, worth to note that the 'struct iwl_device_cmd'
* already contains the maximum payload size.
*
*/
static zx_status_t iwl_mvm_set_tx_params(struct iwl_mvm* mvm, struct ieee80211_mac_packet* pkt,
struct ieee80211_tx_info* info,
const struct iwl_mvm_sta* mvmsta,
struct iwl_device_cmd* dev_cmd) {
zx_status_t ret = ZX_OK;
uint8_t sta_id = mvmsta->sta_id;
struct iwl_tx_cmd* tx_cmd;
/* Make sure we zero enough of dev_cmd */
BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen2) > sizeof(*tx_cmd));
BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen3) > sizeof(*tx_cmd));
memset(dev_cmd, 0, sizeof(dev_cmd->hdr) + sizeof(*tx_cmd));
dev_cmd->hdr.cmd = TX_CMD;
#if 0 // NEEDS_PORTING
if (iwl_mvm_has_new_tx_api(mvm)) {
uint16_t offload_assist = 0;
uint32_t rate_n_flags = 0;
uint16_t flags = 0;
struct iwl_mvm_sta* mvmsta = sta ? iwl_mvm_sta_from_mac80211(sta) : NULL;
if (ieee80211_is_data_qos(hdr->frame_control)) {
uint8_t* qc = ieee80211_get_qos_ctl(hdr);
if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) {
offload_assist |= BIT(TX_CMD_OFFLD_AMSDU);
}
}
offload_assist = iwl_mvm_tx_csum(mvm, skb, hdr, info, offload_assist);
/* padding is inserted later in transport */
if (ieee80211_get_header_len(hdr->frame_control) % 4 &&
!(offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) {
offload_assist |= BIT(TX_CMD_OFFLD_PAD);
}
if (!info->control.hw_key) { flags |= IWL_TX_FLAGS_ENCRYPT_DIS; }
/*
* For data packets rate info comes from the fw. Only
* set rate/antenna during connection establishment or in case
* no station is given.
*/
if (!sta || !ieee80211_is_data(hdr->frame_control) ||
mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) {
flags |= IWL_TX_FLAGS_CMD_RATE;
rate_n_flags = iwl_mvm_get_tx_rate_n_flags(mvm, info, sta, hdr->frame_control);
}
if (mvm->trans->cfg->device_family >= IWL_DEVICE_FAMILY_22560) {
struct iwl_tx_cmd_gen3* cmd = (void*)dev_cmd->payload;
cmd->offload_assist |= cpu_to_le32(offload_assist);
/* Total # bytes to be transmitted */
cmd->len = cpu_to_le16((uint16_t)skb->len);
/* Copy MAC header from skb into command buffer */
memcpy(cmd->hdr, hdr, hdrlen);
cmd->flags = cpu_to_le16(flags);
cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
} else {
struct iwl_tx_cmd_gen2* cmd = (void*)dev_cmd->payload;
cmd->offload_assist |= cpu_to_le16(offload_assist);
/* Total # bytes to be transmitted */
cmd->len = cpu_to_le16((uint16_t)skb->len);
/* Copy MAC header from skb into command buffer */
memcpy(cmd->hdr, hdr, hdrlen);
cmd->flags = cpu_to_le32(flags);
cmd->rate_n_flags = cpu_to_le32(rate_n_flags);
}
goto out;
}
#endif // NEEDS_PORTING
tx_cmd = (struct iwl_tx_cmd*)dev_cmd->payload;
iwl_mvm_set_tx_cmd(mvm, pkt, tx_cmd, sta_id);
if (info->control.hw_key) {
if ((ret = iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, pkt)) != ZX_OK) {
return ret;
}
}
// Set rate ralated fields in iwl_tx_cmd
iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, pkt->common_header);
/* Copy MAC header from pkt into command buffer */
memcpy(tx_cmd->hdr, pkt->common_header, pkt->header_size);
return ZX_OK;
}
#if 0 // NEEDS_PORTING
static void iwl_mvm_skb_prepare_status(struct sk_buff* skb, struct iwl_device_cmd* cmd) {
struct ieee80211_tx_info* skb_info = IEEE80211_SKB_CB(skb);
memset(&skb_info->status, 0, sizeof(skb_info->status));
memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));
skb_info->driver_data[1] = cmd;
}
static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm* mvm, struct ieee80211_tx_info* info,
struct ieee80211_hdr* hdr) {
struct iwl_mvm_vif* mvmvif = iwl_mvm_vif_from_mac80211(info->control.vif);
__le16 fc = hdr->frame_control;
switch (info->control.vif->type) {
case NL80211_IFTYPE_AP:
case NL80211_IFTYPE_ADHOC:
/*
* Non-bufferable frames use the broadcast station, thus they
* use the probe queue.
* Also take care of the case where we send a deauth to a
* station that we don't have, or similarly an association
* response (with non-success status) for a station we can't
* accept.
* Also, disassociate frames might happen, particular with
* reason 7 ("Class 3 frame received from nonassociated STA").
*/
if (ieee80211_is_mgmt(fc) && (!ieee80211_is_bufferable_mmpdu(fc) ||
ieee80211_is_deauth(fc) || ieee80211_is_disassoc(fc))) {
return mvm->probe_queue;
}
if (!ieee80211_has_order(fc) && !ieee80211_is_probe_req(fc) &&
is_multicast_ether_addr(hdr->addr1)) {
return mvmvif->cab_queue;
}
WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC, "fc=0x%02x", le16_to_cpu(fc));
return mvm->probe_queue;
case NL80211_IFTYPE_P2P_DEVICE:
if (ieee80211_is_mgmt(fc)) { return mvm->p2p_dev_queue; }
WARN_ON_ONCE(1);
return mvm->p2p_dev_queue;
default:
WARN_ONCE(1, "Not a ctrl vif, no available queue\n");
return -1;
}
}
static void iwl_mvm_probe_resp_set_noa(struct iwl_mvm* mvm, struct sk_buff* skb) {
struct ieee80211_tx_info* info = IEEE80211_SKB_CB(skb);
struct iwl_mvm_vif* mvmvif = iwl_mvm_vif_from_mac80211(info->control.vif);
struct ieee80211_mgmt* mgmt = (struct ieee80211_mgmt*)skb->data;
int base_len = (uint8_t*)mgmt->u.probe_resp.variable - (uint8_t*)mgmt;
struct iwl_probe_resp_data* resp_data;
uint8_t *ie, *pos;
uint8_t match[] = {
(WLAN_OUI_WFA >> 16) & 0xff,
(WLAN_OUI_WFA >> 8) & 0xff,
WLAN_OUI_WFA & 0xff,
WLAN_OUI_TYPE_WFA_P2P,
};
rcu_read_lock();
resp_data = rcu_dereference(mvmvif->probe_resp_data);
if (!resp_data) { goto out; }
if (!resp_data->notif.noa_active) { goto out; }
ie = (uint8_t*)cfg80211_find_ie_match(WLAN_EID_VENDOR_SPECIFIC, mgmt->u.probe_resp.variable,
skb->len - base_len, match, 4, 2);
if (!ie) {
IWL_DEBUG_TX(mvm, "probe resp doesn't have P2P IE\n");
goto out;
}
if (skb_tailroom(skb) < resp_data->noa_len) {
if (pskb_expand_head(skb, 0, resp_data->noa_len, GFP_ATOMIC)) {
IWL_ERR(mvm, "Failed to reallocate probe resp\n");
goto out;
}
}
pos = skb_put(skb, resp_data->noa_len);
*pos++ = WLAN_EID_VENDOR_SPECIFIC;
/* Set length of IE body (not including ID and length itself) */
*pos++ = resp_data->noa_len - 2;
*pos++ = (WLAN_OUI_WFA >> 16) & 0xff;
*pos++ = (WLAN_OUI_WFA >> 8) & 0xff;
*pos++ = WLAN_OUI_WFA & 0xff;
*pos++ = WLAN_OUI_TYPE_WFA_P2P;
memcpy(pos, &resp_data->notif.noa_attr,
resp_data->noa_len - sizeof(struct ieee80211_vendor_ie));
out:
rcu_read_unlock();
}
int iwl_mvm_tx_skb_non_sta(struct iwl_mvm* mvm, struct sk_buff* skb) {
struct ieee80211_hdr* hdr = (struct ieee80211_hdr*)skb->data;
struct ieee80211_tx_info info;
struct iwl_device_cmd* dev_cmd;
uint8_t sta_id;
int hdrlen = ieee80211_get_header_len(hdr->frame_control);
__le16 fc = hdr->frame_control;
bool offchannel = IEEE80211_SKB_CB(skb)->flags & IEEE80211_TX_CTL_TX_OFFCHAN;
int queue = -1;
memcpy(&info, skb->cb, sizeof(info));
if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) { return -1; }
if (info.control.vif) {
struct iwl_mvm_vif* mvmvif = iwl_mvm_vif_from_mac80211(info.control.vif);
if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
info.control.vif->type == NL80211_IFTYPE_AP ||
info.control.vif->type == NL80211_IFTYPE_ADHOC) {
if (!ieee80211_is_data(hdr->frame_control)) {
sta_id = mvmvif->bcast_sta.sta_id;
} else {
sta_id = mvmvif->mcast_sta.sta_id;
}
queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, hdr);
} else if (info.control.vif->type == NL80211_IFTYPE_MONITOR) {
queue = mvm->snif_queue;
sta_id = mvm->snif_sta.sta_id;
} else if (info.control.vif->type == NL80211_IFTYPE_STATION && offchannel) {
/*
* IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets
* that can be used in 2 different types of vifs, P2P &
* STATION.
* P2P uses the offchannel queue.
* STATION (HS2.0) uses the auxiliary context of the FW,
* and hence needs to be sent on the aux queue.
*/
sta_id = mvm->aux_sta.sta_id;
queue = mvm->aux_queue;
}
}
if (queue < 0) {
IWL_ERR(mvm, "No queue was found. Dropping TX\n");
return -1;
}
if (unlikely(ieee80211_is_probe_resp(fc))) { iwl_mvm_probe_resp_set_noa(mvm, skb); }
IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id);
if (!dev_cmd) { return -1; }
/* From now on, we cannot access info->control */
iwl_mvm_skb_prepare_status(skb, dev_cmd);
if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
return -1;
}
return 0;
}
unsigned int iwl_mvm_max_amsdu_size(struct iwl_mvm* mvm, struct ieee80211_sta* sta,
unsigned int tid) {
struct iwl_mvm_sta* mvmsta = iwl_mvm_sta_from_mac80211(sta);
enum nl80211_band band = mvmsta->vif->bss_conf.chandef.chan->band;
uint8_t ac = tid_to_mac80211_ac[tid];
unsigned int txf;
int lmac = IWL_LMAC_24G_INDEX;
if (iwl_mvm_is_cdb_supported(mvm) && band == NL80211_BAND_5GHZ) { lmac = IWL_LMAC_5G_INDEX; }
/* For HE redirect to trigger based fifos */
if (sta->he_cap.has_he && !WARN_ON(!iwl_mvm_has_new_tx_api(mvm))) { ac += 4; }
txf = iwl_mvm_mac_ac_to_tx_fifo(mvm, ac);
/*
* Don't send an AMSDU that will be longer than the TXF.
* Add a security margin of 256 for the TX command + headers.
* We also want to have the start of the next packet inside the
* fifo to be able to send bursts.
*/
return min_t(unsigned int, mvmsta->max_amsdu_len,
mvm->fwrt.smem_cfg.lmac[lmac].txfifo_size[txf] - 256);
}
#ifdef CONFIG_INET
static int iwl_mvm_tx_tso_segment(struct sk_buff* skb, unsigned int num_subframes,
netdev_features_t netdev_flags, struct sk_buff_head* mpdus_skb) {
struct sk_buff *tmp, *next;
struct ieee80211_hdr* hdr = (void*)skb->data;
char cb[sizeof(skb->cb)];
uint16_t i = 0;
unsigned int tcp_payload_len;
unsigned int mss = skb_shinfo(skb)->gso_size;
bool ipv4 = (skb->protocol == htons(ETH_P_IP));
uint16_t ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
skb_shinfo(skb)->gso_size = num_subframes * mss;
memcpy(cb, skb->cb, sizeof(cb));
next = skb_gso_segment(skb, netdev_flags);
skb_shinfo(skb)->gso_size = mss;
if (WARN_ON_ONCE(IS_ERR(next))) {
return -EINVAL;
} else if (next) {
consume_skb(skb);
}
while (next) {
tmp = next;
next = tmp->next;
memcpy(tmp->cb, cb, sizeof(tmp->cb));
/*
* Compute the length of all the data added for the A-MSDU.
* This will be used to compute the length to write in the TX
* command. We have: SNAP + IP + TCP for n -1 subframes and
* ETH header for n subframes.
*/
tcp_payload_len =
skb_tail_pointer(tmp) - skb_transport_header(tmp) - tcp_hdrlen(tmp) + tmp->data_len;
if (ipv4) { ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes); }
if (tcp_payload_len > mss) {
skb_shinfo(tmp)->gso_size = mss;
} else {
if (ieee80211_is_data_qos(hdr->frame_control)) {
uint8_t* qc;
if (ipv4) { ip_send_check(ip_hdr(tmp)); }
qc = ieee80211_get_qos_ctl((void*)tmp->data);
*qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
}
skb_shinfo(tmp)->gso_size = 0;
}
tmp->prev = NULL;
tmp->next = NULL;
__skb_queue_tail(mpdus_skb, tmp);
i++;
}
return 0;
}
static int iwl_mvm_tx_tso(struct iwl_mvm* mvm, struct sk_buff* skb, struct ieee80211_tx_info* info,
struct ieee80211_sta* sta, struct sk_buff_head* mpdus_skb) {
struct iwl_mvm_sta* mvmsta = iwl_mvm_sta_from_mac80211(sta);
struct ieee80211_hdr* hdr = (void*)skb->data;
unsigned int mss = skb_shinfo(skb)->gso_size;
unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
uint16_t snap_ip_tcp, pad;
unsigned int dbg_max_amsdu_len;
netdev_features_t netdev_flags = NETIF_F_CSUM_MASK | NETIF_F_SG;
uint8_t tid;
snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) + tcp_hdrlen(skb);
dbg_max_amsdu_len = READ_ONCE(mvm->max_amsdu_len);
if (!mvmsta->max_amsdu_len || !ieee80211_is_data_qos(hdr->frame_control) ||
(!mvmsta->amsdu_enabled && !dbg_max_amsdu_len)) {
return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
}
/*
* Do not build AMSDU for IPv6 with extension headers.
* ask stack to segment and checkum the generated MPDUs for us.
*/
if (skb->protocol == htons(ETH_P_IPV6) &&
((struct ipv6hdr*)skb_network_header(skb))->nexthdr != IPPROTO_TCP) {
netdev_flags &= ~NETIF_F_CSUM_MASK;
return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
}
tid = ieee80211_get_tid(hdr);
if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) { return -EINVAL; }
/*
* No need to lock amsdu_in_ampdu_allowed since it can't be modified
* during an BA session.
*/
if (info->flags & IEEE80211_TX_CTL_AMPDU && !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) {
return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
}
if (iwl_mvm_vif_low_latency(iwl_mvm_vif_from_mac80211(mvmsta->vif)) ||
!(mvmsta->amsdu_enabled & BIT(tid))) {
return iwl_mvm_tx_tso_segment(skb, 1, netdev_flags, mpdus_skb);
}
max_amsdu_len = iwl_mvm_max_amsdu_size(mvm, sta, tid);
if (unlikely(dbg_max_amsdu_len)) {
max_amsdu_len = min_t(unsigned int, max_amsdu_len, dbg_max_amsdu_len);
}
/*
* Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
* supported. This is a spec requirement (IEEE 802.11-2015
* section 8.7.3 NOTE 3).
*/
if (info->flags & IEEE80211_TX_CTL_AMPDU && !sta->vht_cap.vht_supported) {
max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
}
/* Sub frame header + SNAP + IP header + TCP header + MSS */
subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
pad = (4 - subf_len) & 0x3;
/*
* If we have N subframes in the A-MSDU, then the A-MSDU's size is
* N * subf_len + (N - 1) * pad.
*/
num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
if (sta->max_amsdu_subframes && num_subframes > sta->max_amsdu_subframes) {
num_subframes = sta->max_amsdu_subframes;
}
tcp_payload_len =
skb_tail_pointer(skb) - skb_transport_header(skb) - tcp_hdrlen(skb) + skb->data_len;
/*
* Make sure we have enough TBs for the A-MSDU:
* 2 for each subframe
* 1 more for each fragment
* 1 more for the potential data in the header
*/
if ((num_subframes * 2 + skb_shinfo(skb)->nr_frags + 1) > mvm->trans->max_skb_frags) {
num_subframes = 1;
}
if (num_subframes > 1) { *ieee80211_get_qos_ctl(hdr) |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; }
/* This skb fits in one single A-MSDU */
if (num_subframes * mss >= tcp_payload_len) {
__skb_queue_tail(mpdus_skb, skb);
return 0;
}
/*
* Trick the segmentation function to make it
* create SKBs that can fit into one A-MSDU.
*/
return iwl_mvm_tx_tso_segment(skb, num_subframes, netdev_flags, mpdus_skb);
}
#else /* CONFIG_INET */
static int iwl_mvm_tx_tso(struct iwl_mvm* mvm, struct sk_buff* skb, struct ieee80211_tx_info* info,
struct ieee80211_sta* sta, struct sk_buff_head* mpdus_skb) {
/* Impossible to get TSO with CONFIG_INET */
WARN_ON(1);
return -1;
}
#endif
/* Check if there are any timed-out TIDs on a given shared TXQ */
static bool iwl_mvm_txq_should_update(struct iwl_mvm* mvm, int txq_id) {
unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap;
unsigned long now = jiffies;
int tid;
if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) { return false; }
for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) {
if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] + IWL_MVM_DQA_QUEUE_TIMEOUT,
now)) {
return true;
}
}
return false;
}
static void iwl_mvm_tx_airtime(struct iwl_mvm* mvm, struct iwl_mvm_sta* mvmsta, int airtime) {
int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
struct iwl_mvm_tcm_mac* mdata;
if (mac >= NUM_MAC_INDEX_DRIVER) { return; }
mdata = &mvm->tcm.data[mac];
if (mvm->tcm.paused) { return; }
if (time_after(jiffies, mvm->tcm.ts + MVM_TCM_PERIOD)) {
schedule_delayed_work(&mvm->tcm.work, 0);
}
mdata->tx.airtime += airtime;
}
#endif // NEEDS_PORTING
static zx_status_t iwl_mvm_tx_pkt_queued(struct iwl_mvm* mvm, struct iwl_mvm_sta* mvmsta, int tid) {
uint32_t ac = tid_to_mac80211_ac[tid];
int mac = mvmsta->mac_id_n_color & FW_CTXT_ID_MSK;
struct iwl_mvm_tcm_mac* mdata;
if (mac >= NUM_MAC_INDEX_DRIVER) {
IWL_ERR(mvm, "invliad mac value %d (> %d)\n", mac, NUM_MAC_INDEX_DRIVER);
return ZX_ERR_INVALID_ARGS;
}
mdata = &mvm->tcm.data[mac];
mdata->tx.pkts[ac]++;
return ZX_OK;
}
static zx_status_t iwl_mvm_tx_mpdu(struct iwl_mvm* mvm, struct ieee80211_mac_packet* pkt,
struct ieee80211_tx_info* info, struct iwl_mvm_sta* mvmsta) {
zx_status_t ret = ZX_OK;
uint8_t tid = IWL_MAX_TID_COUNT; // TODO(51120): support QoS
uint16_t txq_id = mvmsta->tid_data[tid].txq_id;
struct iwl_device_cmd dev_cmd;
if ((ret = iwl_mvm_set_tx_params(mvm, pkt, info, mvmsta, &dev_cmd)) != ZX_OK) {
return ret;
}
mtx_lock(&mvmsta->lock);
uint16_t seq_number = mvmsta->tid_data[tid].seq_number;
IWL_DEBUG_TX(mvm, "iwl_mvm_tx_mpdu() TX to [std_id:%d|tid:%d] txq_id:%d - seq:0x%x\n",
mvmsta->sta_id, tid, txq_id, seq_number >> 4);
ret = iwl_trans_tx(mvm->trans, pkt, &dev_cmd, txq_id);
mtx_unlock(&mvmsta->lock);
if ((ret != ZX_OK)) {
return ret;
}
return iwl_mvm_tx_pkt_queued(mvm, mvmsta, tid == IWL_MAX_TID_COUNT ? 0 : tid);
#if 0 // NEEDS_PORTING
// TODO(fxbug.dev/49224): support power saving.
/*
* we handle that entirely ourselves -- for uAPSD the firmware
* will always send a notification, and for PS-Poll responses
* we'll notify mac80211 when getting frame status
*/
info->flags &= ~IEEE80211_TX_STATUS_EOSP;
spin_lock(&mvmsta->lock);
/* nullfunc frames should go to the MGMT queue regardless of QOS,
* the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default
* assignment of MGMT TID
*/
if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
tid = ieee80211_get_tid(hdr);
if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) { goto drop_unlock_sta; }
is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
if (WARN_ON_ONCE(is_ampdu && mvmsta->tid_data[tid].state != IWL_AGG_ON)) {
goto drop_unlock_sta;
}
seq_number = mvmsta->tid_data[tid].seq_number;
seq_number &= IEEE80211_SCTL_SEQ;
if (!iwl_mvm_has_new_tx_api(mvm)) {
struct iwl_tx_cmd* tx_cmd = (void*)dev_cmd->payload;
hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
hdr->seq_ctrl |= cpu_to_le16(seq_number);
/* update the tx_cmd hdr as it was already copied */
tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl;
}
} else if (ieee80211_is_data(fc) && !ieee80211_is_data_qos(fc)) {
tid = IWL_TID_NON_QOS;
}
txq_id = mvmsta->tid_data[tid].txq_id;
WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
if (WARN_ON_ONCE(txq_id == IWL_MVM_INVALID_QUEUE)) {
iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
spin_unlock(&mvmsta->lock);
return 0;
}
if (!iwl_mvm_has_new_tx_api(mvm)) {
/* Keep track of the time of the last frame for this RA/TID */
mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
/*
* If we have timed-out TIDs - schedule the worker that will
* reconfig the queues and update them
*
* Note that the no lock is taken here in order to not serialize
* the TX flow. This isn't dangerous because scheduling
* mvm->add_stream_wk can't ruin the state, and if we DON'T
* schedule it due to some race condition then next TX we get
* here we will.
*/
if (unlikely(mvm->queue_info[txq_id].status == IWL_MVM_QUEUE_SHARED &&
iwl_mvm_txq_should_update(mvm, txq_id))) {
schedule_work(&mvm->add_stream_wk);
}
}
IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id, tid, txq_id,
IEEE80211_SEQ_TO_SN(seq_number));
/* From now on, we cannot access info->control */
iwl_mvm_skb_prepare_status(skb, dev_cmd);
if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) { goto drop_unlock_sta; }
if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) {
mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
}
spin_unlock(&mvmsta->lock);
if (iwl_mvm_tx_pkt_queued(mvm, mvmsta, tid == IWL_MAX_TID_COUNT ? 0 : tid)) { goto drop; }
return 0;
drop_unlock_sta:
iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
spin_unlock(&mvmsta->lock);
drop:
return -1;
#endif // NEEDS_PORTING
}
zx_status_t iwl_mvm_tx_skb(struct iwl_mvm* mvm, struct ieee80211_mac_packet* pkt,
struct iwl_mvm_sta* mvmsta) {
struct ieee80211_tx_info info = pkt->info;
if (!mvmsta) {
IWL_ERR(mvm, "iwl_mvm_tx_skb(): mvmsta is NULL\n");
return ZX_ERR_INVALID_ARGS;
}
if (mvmsta->sta_id == IWL_MVM_INVALID_STA) {
IWL_ERR(mvm, "iwl_mvm_tx_skb(): mvmsta->sta_id is invalid\n");
return ZX_ERR_INVALID_ARGS;
}
return iwl_mvm_tx_mpdu(mvm, pkt, &info, mvmsta);
#if 0 // NEEDS_PORTING
// TODO(fxbug.dev/61069): supports TSO (TCP Segment Offload)/
memcpy(&info, skb->cb, sizeof(info));
if (!skb_is_gso(skb)) { return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); }
payload_len =
skb_tail_pointer(skb) - skb_transport_header(skb) - tcp_hdrlen(skb) + skb->data_len;
if (payload_len <= skb_shinfo(skb)->gso_size) { return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); }
__skb_queue_head_init(&mpdus_skbs);
ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
if (ret) { return ret; }
if (WARN_ON(skb_queue_empty(&mpdus_skbs))) { return ret; }
while (!skb_queue_empty(&mpdus_skbs)) {
skb = __skb_dequeue(&mpdus_skbs);
ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
if (ret) {
__skb_queue_purge(&mpdus_skbs);
return ret;
}
}
return 0;
#endif // NEEDS_PORTING
}
#if 0 // NEEDS_PORTING
static void iwl_mvm_check_ratid_empty(struct iwl_mvm* mvm, struct ieee80211_sta* sta, uint8_t tid) {
struct iwl_mvm_sta* mvmsta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_mvm_tid_data* tid_data = &mvmsta->tid_data[tid];
struct ieee80211_vif* vif = mvmsta->vif;
uint16_t normalized_ssn;
iwl_assert_lock_held(&mvmsta->lock);
if ((tid_data->state == IWL_AGG_ON || tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
iwl_mvm_tid_queued(mvm, tid_data) == 0) {
/*
* Now that this aggregation or DQA queue is empty tell
* mac80211 so it knows we no longer have frames buffered for
* the station on this TID (for the TIM bitmap calculation.)
*/
ieee80211_sta_set_buffered(sta, tid, false);
}
/*
* In 22000 HW, the next_reclaimed index is only 8 bit, so we'll need
* to align the wrap around of ssn so we compare relevant values.
*/
normalized_ssn = tid_data->ssn;
if (mvm->trans->cfg->gen2) { normalized_ssn &= 0xff; }
if (normalized_ssn != tid_data->next_reclaimed) { return; }
switch (tid_data->state) {
case IWL_EMPTYING_HW_QUEUE_ADDBA:
IWL_DEBUG_TX_QUEUES(mvm, "Can continue addBA flow ssn = next_recl = %d\n",
tid_data->next_reclaimed);
tid_data->state = IWL_AGG_STARTING;
ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
break;
case IWL_EMPTYING_HW_QUEUE_DELBA:
IWL_DEBUG_TX_QUEUES(mvm, "Can continue DELBA flow ssn = next_recl = %d\n",
tid_data->next_reclaimed);
tid_data->state = IWL_AGG_OFF;
ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
break;
default:
break;
}
}
#ifdef CPTCFG_IWLWIFI_DEBUG
const char* iwl_mvm_get_tx_fail_reason(uint32_t status) {
#define TX_STATUS_FAIL(x) \
case TX_STATUS_FAIL_##x: \
return #x
#define TX_STATUS_POSTPONE(x) \
case TX_STATUS_POSTPONE_##x: \
return #x
switch (status & TX_STATUS_MSK) {
case TX_STATUS_SUCCESS:
return "SUCCESS";
TX_STATUS_POSTPONE(DELAY);
TX_STATUS_POSTPONE(FEW_BYTES);
TX_STATUS_POSTPONE(BT_PRIO);
TX_STATUS_POSTPONE(QUIET_PERIOD);
TX_STATUS_POSTPONE(CALC_TTAK);
TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
TX_STATUS_FAIL(SHORT_LIMIT);
TX_STATUS_FAIL(LONG_LIMIT);
TX_STATUS_FAIL(UNDERRUN);
TX_STATUS_FAIL(DRAIN_FLOW);
TX_STATUS_FAIL(RFKILL_FLUSH);
TX_STATUS_FAIL(LIFE_EXPIRE);
TX_STATUS_FAIL(DEST_PS);
TX_STATUS_FAIL(HOST_ABORTED);
TX_STATUS_FAIL(BT_RETRY);
TX_STATUS_FAIL(STA_INVALID);
TX_STATUS_FAIL(FRAG_DROPPED);
TX_STATUS_FAIL(TID_DISABLE);
TX_STATUS_FAIL(FIFO_FLUSHED);
TX_STATUS_FAIL(SMALL_CF_POLL);
TX_STATUS_FAIL(FW_DROP);
TX_STATUS_FAIL(STA_COLOR_MISMATCH);
}
return "UNKNOWN";
#undef TX_STATUS_FAIL
#undef TX_STATUS_POSTPONE
}
#endif /* CPTCFG_IWLWIFI_DEBUG */
void iwl_mvm_hwrate_to_tx_rate(uint32_t rate_n_flags, enum nl80211_band band,
struct ieee80211_tx_rate* r) {
if (rate_n_flags & RATE_HT_MCS_GF_MSK) { r->flags |= IEEE80211_TX_RC_GREEN_FIELD; }
switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
case RATE_MCS_CHAN_WIDTH_20:
break;
case RATE_MCS_CHAN_WIDTH_40:
r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
break;
case RATE_MCS_CHAN_WIDTH_80:
r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
break;
case RATE_MCS_CHAN_WIDTH_160:
r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
break;
}
if (rate_n_flags & RATE_MCS_SGI_MSK) { r->flags |= IEEE80211_TX_RC_SHORT_GI; }
if (rate_n_flags & RATE_MCS_HT_MSK) {
r->flags |= IEEE80211_TX_RC_MCS;
r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
} else if (rate_n_flags & RATE_MCS_VHT_MSK) {
ieee80211_rate_set_vht(r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> RATE_VHT_MCS_NSS_POS) + 1);
r->flags |= IEEE80211_TX_RC_VHT_MCS;
} else {
r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, band);
}
}
/**
* translate ucode response to mac80211 tx status control values
*/
static void iwl_mvm_hwrate_to_tx_status(uint32_t rate_n_flags, struct ieee80211_tx_info* info) {
struct ieee80211_tx_rate* r = &info->status.rates[0];
info->status.antenna = ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
}
#ifdef CPTCFG_MAC80211_LATENCY_MEASUREMENTS
static void iwl_mvm_tx_lat_add_ts_ack(struct sk_buff* skb) {
s64 temp = ktime_to_ms(ktime_get());
s64 ts_1 = ktime_to_ns(skb->tstamp) >> 32;
s64 diff = temp - ts_1;
#if LINUX_VERSION_IS_LESS(4, 10, 0)
skb->tstamp.tv64 += diff;
#else
skb->tstamp += diff;
#endif
}
#endif
static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm* mvm, uint32_t status) {
struct iwl_fw_dbg_trigger_tlv* trig;
struct iwl_fw_dbg_trigger_tx_status* status_trig;
int i;
trig = iwl_fw_dbg_trigger_on(&mvm->fwrt, NULL, FW_DBG_TRIGGER_TX_STATUS);
if (!trig) { return; }
status_trig = (void*)trig->data;
for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
/* don't collect on status 0 */
if (!status_trig->statuses[i].status) { break; }
if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) { continue; }
iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, "Tx status %d was received",
status & TX_STATUS_MSK);
break;
}
}
#endif // NEEDS_PORTING
/**
* iwl_mvm_get_scd_ssn - returns the SSN of the SCD
* @tx_resp: the Tx response from the fw (agg or non-agg)
*
* When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since
* it can't know that everything will go well until the end of the AMPDU, it
* can't know in advance the number of MPDUs that will be sent in the current
* batch. This is why it writes the agg Tx response while it fetches the MPDUs.
* Hence, it can't know in advance what the SSN of the SCD will be at the end
* of the batch. This is why the SSN of the SCD is written at the end of the
* whole struct at a variable offset. This function knows how to cope with the
* variable offset and returns the SSN of the SCD.
*/
static inline uint32_t iwl_mvm_get_scd_ssn(struct iwl_mvm* mvm, struct iwl_mvm_tx_resp* tx_resp) {
return le32_to_cpup((__le32*)iwl_mvm_get_agg_status(mvm, tx_resp) + tx_resp->frame_count) & 0xfff;
}
static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm* mvm, struct iwl_rx_packet* pkt) {
// Since we don't free any buffer in FX, this function is not used.
uint16_t sequence = le16_to_cpu(pkt->hdr.sequence);
int txq_id = SEQ_TO_QUEUE(sequence);
/* struct iwl_mvm_tx_resp_v3 is almost the same */
struct iwl_mvm_tx_resp* tx_resp = (void*)pkt->data;
uint16_t ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp);
#if 0 // NEEDS_PORTING
struct ieee80211_sta* sta;
int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
struct agg_tx_status* agg_status = iwl_mvm_get_agg_status(mvm, tx_resp);
uint32_t status = le16_to_cpu(agg_status->status);
struct sk_buff_head skbs;
uint8_t skb_freed = 0;
uint8_t lq_color;
uint16_t next_reclaimed, seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
bool is_ndp = false;
__skb_queue_head_init(&skbs);
#endif // NEEDS_PORTING
if (iwl_mvm_has_new_tx_api(mvm)) {
txq_id = le16_to_cpu(tx_resp->tx_queue);
}
/* we can free until ssn % q.n_bd not inclusive */
iwl_trans_reclaim(mvm->trans, txq_id, ssn);
#if 0 // NEEDS_PORTING
while (!skb_queue_empty(&skbs)) {
struct sk_buff* skb = __skb_dequeue(&skbs);
struct ieee80211_tx_info* info = IEEE80211_SKB_CB(skb);
struct ieee80211_hdr* hdr = (void*)skb->data;
bool flushed = false;
#ifdef CPTCFG_MAC80211_LATENCY_MEASUREMENTS
iwl_mvm_tx_lat_add_ts_ack(skb);
#endif
skb_freed++;
iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
memset(&info->status, 0, sizeof(info->status));
/* inform mac80211 about what happened with the frame */
switch (status & TX_STATUS_MSK) {
case TX_STATUS_SUCCESS:
case TX_STATUS_DIRECT_DONE:
info->flags |= IEEE80211_TX_STAT_ACK;
break;
case TX_STATUS_FAIL_FIFO_FLUSHED:
case TX_STATUS_FAIL_DRAIN_FLOW:
flushed = true;
break;
case TX_STATUS_FAIL_DEST_PS:
/* the FW should have stopped the queue and not
* return this status
*/
WARN_ON(1);
info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
break;
default:
break;
}
if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
ieee80211_is_mgmt(hdr->frame_control)) {
iwl_mvm_toggle_tx_ant(mvm, &mvm->mgmt_last_antenna_idx);
}
/*
* If we are freeing multiple frames, mark all the frames
* but the first one as acked, since they were acknowledged
* before
* */
if (skb_freed > 1) { info->flags |= IEEE80211_TX_STAT_ACK; }
iwl_mvm_tx_status_check_trigger(mvm, status);
info->status.rates[0].count = tx_resp->failure_frame + 1;
iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate), info);
info->status.status_driver_data[1] = (void*)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
/* Single frame failure in an AMPDU queue => send BAR */
if (info->flags & IEEE80211_TX_CTL_AMPDU && !(info->flags & IEEE80211_TX_STAT_ACK) &&
!(info->flags & IEEE80211_TX_STAT_TX_FILTERED) &&
#ifdef CPTCFG_IWLMVM_AX_SOFTAP_TESTMODE
!flushed && mvm->is_bar_enabled)
#else
!flushed)
#endif
info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
info->flags &= ~IEEE80211_TX_CTL_AMPDU;
/* W/A FW bug: seq_ctl is wrong upon failure / BAR frame */
if (ieee80211_is_back_req(hdr->frame_control)) {
seq_ctl = 0;
} else if (status != TX_STATUS_SUCCESS) {
seq_ctl = le16_to_cpu(hdr->seq_ctrl);
}
if (unlikely(!seq_ctl)) {
struct ieee80211_hdr* hdr = (void*)skb->data;
/*
* If it is an NDP, we can't update next_reclaim since
* its sequence control is 0. Note that for that same
* reason, NDPs are never sent to A-MPDU'able queues
* so that we can never have more than one freed frame
* for a single Tx resonse (see WARN_ON below).
*/
if (ieee80211_is_qos_nullfunc(hdr->frame_control)) { is_ndp = true; }
}
/*
* TODO: this is not accurate if we are freeing more than one
* packet.
*/
info->status.tx_time = le16_to_cpu(tx_resp->wireless_media_time);
BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
info->status.status_driver_data[0] = RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc);
#ifdef CPTCFG_IWLMVM_TDLS_PEER_CACHE
if (info->flags & IEEE80211_TX_STAT_ACK) {
iwl_mvm_tdls_peer_cache_pkt(mvm, (void*)skb->data, skb->len, -1);
}
#endif /* CPTCFG_IWLMVM_TDLS_PEER_CACHE */
ieee80211_tx_status(mvm->hw, skb);
}
// TODO(49530): Supports Shared Tx Queue.
/* This is an aggregation queue or might become one, so we use
* the ssn since: ssn = wifi seq_num % 256.
* The seq_ctl is the sequence control of the packet to which
* this Tx response relates. But if there is a hole in the
* bitmap of the BA we received, this Tx response may allow to
* reclaim the hole and all the subsequent packets that were
* already acked. In that case, seq_ctl != ssn, and the next
* packet to be reclaimed will be ssn and not seq_ctl. In that
* case, several packets will be reclaimed even if
* frame_count = 1.
*
* The ssn is the index (% 256) of the latest packet that has
* treated (acked / dropped) + 1.
*/
next_reclaimed = ssn;
IWL_DEBUG_TX_REPLY(mvm, "TXQ %d status %s (0x%08x)\n", txq_id,
iwl_mvm_get_tx_fail_reason(status), status);
IWL_DEBUG_TX_REPLY(
mvm,
"\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
le32_to_cpu(tx_resp->initial_rate), tx_resp->failure_frame, SEQ_TO_INDEX(sequence), ssn,
next_reclaimed, seq_ctl);
rcu_read_lock();
sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
/*
* sta can't be NULL otherwise it'd mean that the sta has been freed in
* the firmware while we still have packets for it in the Tx queues.
*/
if (WARN_ON_ONCE(!sta)) { goto out; }
if (!IS_ERR(sta)) {
struct iwl_mvm_sta* mvmsta = iwl_mvm_sta_from_mac80211(sta);
iwl_mvm_tx_airtime(mvm, mvmsta, le16_to_cpu(tx_resp->wireless_media_time));
if ((status & TX_STATUS_MSK) != TX_STATUS_SUCCESS &&
mvmsta->sta_state < IEEE80211_STA_AUTHORIZED) {
iwl_mvm_toggle_tx_ant(mvm, &mvmsta->tx_ant);
}
if (sta->wme && tid != IWL_MGMT_TID) {
struct iwl_mvm_tid_data* tid_data = &mvmsta->tid_data[tid];
bool send_eosp_ndp = false;
spin_lock_bh(&mvmsta->lock);
if (!is_ndp) {
tid_data->next_reclaimed = next_reclaimed;
IWL_DEBUG_TX_REPLY(mvm, "Next reclaimed packet:%d\n", next_reclaimed);
} else {
IWL_DEBUG_TX_REPLY(mvm, "NDP - don't update next_reclaimed\n");
}
iwl_mvm_check_ratid_empty(mvm, sta, tid);
if (mvmsta->sleep_tx_count) {
mvmsta->sleep_tx_count--;
if (mvmsta->sleep_tx_count && !iwl_mvm_tid_queued(mvm, tid_data)) {
/*
* The number of frames in the queue
* dropped to 0 even if we sent less
* frames than we thought we had on the
* Tx queue.
* This means we had holes in the BA
* window that we just filled, ask
* mac80211 to send EOSP since the
* firmware won't know how to do that.
* Send NDP and the firmware will send
* EOSP notification that will trigger
* a call to ieee80211_sta_eosp().
*/
send_eosp_ndp = true;
}
}
spin_unlock_bh(&mvmsta->lock);
if (send_eosp_ndp) {
iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, IEEE80211_FRAME_RELEASE_UAPSD, 1, tid,
false, false);
mvmsta->sleep_tx_count = 0;
ieee80211_send_eosp_nullfunc(sta, tid);
}
}
if (mvmsta->next_status_eosp) {
mvmsta->next_status_eosp = false;
ieee80211_sta_eosp(sta);
}
}
out:
rcu_read_unlock();
#endif // NEEDS_PORTING
}
#if 0 // NEEDS_PORTING
#ifdef CPTCFG_IWLWIFI_DEBUG
#define AGG_TX_STATE_(x) \
case AGG_TX_STATE_##x: \
return #x
static const char* iwl_get_agg_tx_status(uint16_t status) {
switch (status & AGG_TX_STATE_STATUS_MSK) {
AGG_TX_STATE_(TRANSMITTED);
AGG_TX_STATE_(UNDERRUN);
AGG_TX_STATE_(BT_PRIO);
AGG_TX_STATE_(FEW_BYTES);
AGG_TX_STATE_(ABORT);
AGG_TX_STATE_(TX_ON_AIR_DROP);
AGG_TX_STATE_(LAST_SENT_TRY_CNT);
AGG_TX_STATE_(LAST_SENT_BT_KILL);
AGG_TX_STATE_(SCD_QUERY);
AGG_TX_STATE_(TEST_BAD_CRC32);
AGG_TX_STATE_(RESPONSE);
AGG_TX_STATE_(DUMP_TX);
AGG_TX_STATE_(DELAY_TX);
}
return "UNKNOWN";
}
static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm* mvm, struct iwl_rx_packet* pkt) {
struct iwl_mvm_tx_resp* tx_resp = (void*)pkt->data;
struct agg_tx_status* frame_status = iwl_mvm_get_agg_status(mvm, tx_resp);
int i;
for (i = 0; i < tx_resp->frame_count; i++) {
uint16_t fstatus = le16_to_cpu(frame_status[i].status);
IWL_DEBUG_TX_REPLY(mvm, "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
iwl_get_agg_tx_status(fstatus), fstatus & AGG_TX_STATE_STATUS_MSK,
(fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> AGG_TX_STATE_TRY_CNT_POS,
le16_to_cpu(frame_status[i].sequence));
}
}
#else
static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm* mvm, struct iwl_rx_packet* pkt) {}
#endif /* CPTCFG_IWLWIFI_DEBUG */
#endif // NEEDS_PORTING
static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm* mvm, struct iwl_rx_packet* pkt) {
#if 0 // NEEDS_PORTING
struct iwl_mvm_tx_resp* tx_resp = (void*)pkt->data;
int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
uint16_t sequence = le16_to_cpu(pkt->hdr.sequence);
struct iwl_mvm_sta* mvmsta;
int queue = SEQ_TO_QUEUE(sequence);
struct ieee80211_sta* sta;
if (WARN_ON_ONCE(queue < IWL_MVM_DQA_MIN_DATA_QUEUE &&
(queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))) {
return;
}
iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
rcu_read_lock();
mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
if (WARN_ON_ONCE(!sta || !sta->wme)) {
rcu_read_unlock();
return;
}
if (!WARN_ON_ONCE(!mvmsta)) {
mvmsta->tid_data[tid].rate_n_flags = le32_to_cpu(tx_resp->initial_rate);
mvmsta->tid_data[tid].tx_time = le16_to_cpu(tx_resp->wireless_media_time);
mvmsta->tid_data[tid].lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info);
iwl_mvm_tx_airtime(mvm, mvmsta, le16_to_cpu(tx_resp->wireless_media_time));
}
rcu_read_unlock();
#endif // NEEDS_PORTING
}
void iwl_mvm_rx_tx_cmd(struct iwl_mvm* mvm, struct iwl_rx_cmd_buffer* rxb) {
struct iwl_rx_packet* pkt = rxb_addr(rxb);
struct iwl_mvm_tx_resp* tx_resp = (void*)pkt->data;
if (tx_resp->frame_count == 1) {
iwl_mvm_rx_tx_cmd_single(mvm, pkt);
} else {
iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
}
}
#if 0 // NEEDS_PORTING
static void iwl_mvm_tx_reclaim(struct iwl_mvm* mvm, int sta_id, int tid, int txq, int index,
struct ieee80211_tx_info* ba_info, uint32_t rate) {
struct sk_buff_head reclaimed_skbs;
struct iwl_mvm_tid_data* tid_data;
struct ieee80211_sta* sta;
struct iwl_mvm_sta* mvmsta;
struct sk_buff* skb;
int freed;
if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT || tid > IWL_MAX_TID_COUNT, "sta_id %d tid %d",
sta_id, tid)) {
return;
}
rcu_read_lock();
sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
/* Reclaiming frames for a station that has been deleted ? */
if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
rcu_read_unlock();
return;
}
mvmsta = iwl_mvm_sta_from_mac80211(sta);
tid_data = &mvmsta->tid_data[tid];
if (tid_data->txq_id != txq) {
IWL_ERR(mvm, "invalid BA notification: Q %d, tid %d\n", tid_data->txq_id, tid);
rcu_read_unlock();
return;
}
__skb_queue_head_init(&reclaimed_skbs);
/*
* Release all TFDs before the SSN, i.e. all TFDs in front of
* block-ack window (we assume that they've been successfully
* transmitted ... if not, it's too late anyway).
*/
iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs);
spin_lock_bh(&mvmsta->lock);
tid_data->next_reclaimed = index;
iwl_mvm_check_ratid_empty(mvm, sta, tid);
freed = 0;
/* pack lq color from tid_data along the reduced txp */
ba_info->status.status_driver_data[0] =
RS_DRV_DATA_PACK(tid_data->lq_color, ba_info->status.status_driver_data[0]);
ba_info->status.status_driver_data[1] = (void*)(uintptr_t)rate;
skb_queue_walk(&reclaimed_skbs, skb) {
struct ieee80211_hdr* hdr = (void*)skb->data;
struct ieee80211_tx_info* info = IEEE80211_SKB_CB(skb);
#ifdef CPTCFG_MAC80211_LATENCY_MEASUREMENTS
iwl_mvm_tx_lat_add_ts_ack(skb);
#endif
if (ieee80211_is_data_qos(hdr->frame_control)) {
freed++;
} else {
WARN_ON_ONCE(tid != IWL_MAX_TID_COUNT);
}
iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
memset(&info->status, 0, sizeof(info->status));
/* Packet was transmitted successfully, failures come as single
* frames because before failing a frame the firmware transmits
* it without aggregation at least once.
*/
info->flags |= IEEE80211_TX_STAT_ACK;
#ifdef CPTCFG_IWLMVM_TDLS_PEER_CACHE
iwl_mvm_tdls_peer_cache_pkt(mvm, hdr, skb->len, -1);
#endif /* CPTCFG_IWLMVM_TDLS_PEER_CACHE */
/* this is the first skb we deliver in this batch */
/* put the rate scaling data there */
if (freed == 1) {
info->flags |= IEEE80211_TX_STAT_AMPDU;
memcpy(&info->status, &ba_info->status, sizeof(ba_info->status));
iwl_mvm_hwrate_to_tx_status(rate, info);
}
}
spin_unlock_bh(&mvmsta->lock);
/* We got a BA notif with 0 acked or scd_ssn didn't progress which is
* possible (i.e. first MPDU in the aggregation wasn't acked)
* Still it's important to update RS about sent vs. acked.
*/
if (skb_queue_empty(&reclaimed_skbs)) {
struct ieee80211_chanctx_conf* chanctx_conf = NULL;
if (mvmsta->vif) { chanctx_conf = rcu_dereference(mvmsta->vif->chanctx_conf); }
if (WARN_ON_ONCE(!chanctx_conf)) { goto out; }
ba_info->band = chanctx_conf->def.chan->band;
iwl_mvm_hwrate_to_tx_status(rate, ba_info);
if (!iwl_mvm_has_tlc_offload(mvm)) {
IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false);
}
}
out:
rcu_read_unlock();
while (!skb_queue_empty(&reclaimed_skbs)) {
skb = __skb_dequeue(&reclaimed_skbs);
ieee80211_tx_status(mvm->hw, skb);
}
}
#endif // NEEDS_PORTING
void iwl_mvm_rx_ba_notif(struct iwl_mvm* mvm, struct iwl_rx_cmd_buffer* rxb) {
#if 0 // NEEDS_PORTING
struct iwl_rx_packet* pkt = rxb_addr(rxb);
int sta_id, tid, txq, index;
struct ieee80211_tx_info ba_info = {};
struct iwl_mvm_ba_notif* ba_notif;
struct iwl_mvm_tid_data* tid_data;
struct iwl_mvm_sta* mvmsta;
ba_info.flags = IEEE80211_TX_STAT_AMPDU;
if (iwl_mvm_has_new_tx_api(mvm)) {
struct iwl_mvm_compressed_ba_notif* ba_res = (void*)pkt->data;
uint8_t lq_color = TX_RES_RATE_TABLE_COL_GET(ba_res->tlc_rate_info);
int i;
sta_id = ba_res->sta_id;
ba_info.status.ampdu_ack_len = (uint8_t)le16_to_cpu(ba_res->done);
ba_info.status.ampdu_len = (uint8_t)le16_to_cpu(ba_res->txed);
ba_info.status.tx_time = (uint16_t)le32_to_cpu(ba_res->wireless_time);
ba_info.status.status_driver_data[0] = (void*)(uintptr_t)ba_res->reduced_txp;
if (!le16_to_cpu(ba_res->tfd_cnt)) { goto out; }
rcu_read_lock();
mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
if (!mvmsta) { goto out_unlock; }
/* Free per TID */
for (i = 0; i < le16_to_cpu(ba_res->tfd_cnt); i++) {
struct iwl_mvm_compressed_ba_tfd* ba_tfd = &ba_res->tfd[i];
tid = ba_tfd->tid;
if (tid == IWL_MGMT_TID) { tid = IWL_MAX_TID_COUNT; }
mvmsta->tid_data[i].lq_color = lq_color;
iwl_mvm_tx_reclaim(mvm, sta_id, tid, (int)(le16_to_cpu(ba_tfd->q_num)),
le16_to_cpu(ba_tfd->tfd_index), &ba_info,
le32_to_cpu(ba_res->tx_rate));
}
iwl_mvm_tx_airtime(mvm, mvmsta, le32_to_cpu(ba_res->wireless_time));
out_unlock:
rcu_read_unlock();
out:
IWL_DEBUG_TX_REPLY(
mvm, "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n", sta_id,
le32_to_cpu(ba_res->flags), le16_to_cpu(ba_res->txed), le16_to_cpu(ba_res->done));
return;
}
ba_notif = (void*)pkt->data;
sta_id = ba_notif->sta_id;
tid = ba_notif->tid;
/* "flow" corresponds to Tx queue */
txq = le16_to_cpu(ba_notif->scd_flow);
/* "ssn" is start of block-ack Tx window, corresponds to index
* (in Tx queue's circular buffer) of first TFD/frame in window */
index = le16_to_cpu(ba_notif->scd_ssn);
rcu_read_lock();
mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
if (WARN_ON_ONCE(!mvmsta)) {
rcu_read_unlock();
return;
}
tid_data = &mvmsta->tid_data[tid];
ba_info.status.ampdu_ack_len = ba_notif->txed_2_done;
ba_info.status.ampdu_len = ba_notif->txed;
ba_info.status.tx_time = tid_data->tx_time;
ba_info.status.status_driver_data[0] = (void*)(uintptr_t)ba_notif->reduced_txp;
rcu_read_unlock();
iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info, tid_data->rate_n_flags);
IWL_DEBUG_TX_REPLY(mvm, "BA_NOTIFICATION Received from %pM, sta_id = %d\n", ba_notif->sta_addr,
ba_notif->sta_id);
IWL_DEBUG_TX_REPLY(
mvm,
"TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), le64_to_cpu(ba_notif->bitmap), txq, index,
ba_notif->txed, ba_notif->txed_2_done);
IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", ba_notif->reduced_txp);
#endif // NEEDS_PORTING
}
/*
* Note that there are transports that buffer frames before they reach
* the firmware. This means that after flush_tx_path is called, the
* queue might not be empty. The race-free way to handle this is to:
* 1) set the station as draining
* 2) flush the Tx path
* 3) wait for the transport queues to be empty
*/
zx_status_t iwl_mvm_flush_tx_path(struct iwl_mvm* mvm, uint32_t tfd_msk, uint32_t flags) {
zx_status_t ret;
struct iwl_tx_path_flush_cmd_v1 flush_cmd = {
.queues_ctl = cpu_to_le32(tfd_msk),
.flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
};
WARN_ON(iwl_mvm_has_new_tx_api(mvm));
ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, sizeof(flush_cmd), &flush_cmd);
if (ret != ZX_OK) {
IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
}
return ret;
}
zx_status_t iwl_mvm_flush_sta_tids(struct iwl_mvm* mvm, uint32_t sta_id, uint16_t tids,
uint32_t flags) {
zx_status_t ret;
struct iwl_tx_path_flush_cmd flush_cmd = {
.sta_id = cpu_to_le32(sta_id),
.tid_mask = cpu_to_le16(tids),
};
WARN_ON(!iwl_mvm_has_new_tx_api(mvm));
ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, sizeof(flush_cmd), &flush_cmd);
if (ret != ZX_OK) {
IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
}
return ret;
}
zx_status_t iwl_mvm_flush_sta(struct iwl_mvm* mvm, void* sta, bool internal, uint32_t flags) {
struct iwl_mvm_int_sta* int_sta = sta;
struct iwl_mvm_sta* mvm_sta = sta;
BUILD_BUG_ON(offsetof(struct iwl_mvm_int_sta, sta_id) != offsetof(struct iwl_mvm_sta, sta_id));
if (iwl_mvm_has_new_tx_api(mvm)) {
return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id, 0xff | BIT(IWL_MGMT_TID), flags);
}
if (internal) {
return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk, flags);
}
return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, flags);
}