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Miller" , Jakub Kicinski , Aviad Brikman , Eliav Farber , Oleksandr Savchenko , Shay Bar , Viktor Barna Subject: [RFC v1 009/256] cl8k: add ampdu.c Date: Thu, 17 Jun 2021 15:58:16 +0000 Message-Id: <20210617160223.160998-10-viktor.barna@celeno.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210617160223.160998-1-viktor.barna@celeno.com> References: <20210617160223.160998-1-viktor.barna@celeno.com> Content-Transfer-Encoding: quoted-printable Content-Type: text/plain X-Originating-IP: [62.216.42.54] X-ClientProxiedBy: PR3PR09CA0018.eurprd09.prod.outlook.com (2603:10a6:102:b7::23) To AM9P192MB1412.EURP192.PROD.OUTLOOK.COM (2603:10a6:20b:38b::16) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from localhost.localdomain (62.216.42.54) by PR3PR09CA0018.eurprd09.prod.outlook.com (2603:10a6:102:b7::23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4242.18 via Frontend Transport; Thu, 17 Jun 2021 16:02:43 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: fbd63310-9827-45a8-3abc-08d931a95787 X-MS-TrafficTypeDiagnostic: AM9P192MB1412: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:1417; 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Please, take a look at the cover letter for more details). Signed-off-by: Viktor Barna --- drivers/net/wireless/celeno/cl8k/ampdu.c | 344 +++++++++++++++++++++++ 1 file changed, 344 insertions(+) create mode 100644 drivers/net/wireless/celeno/cl8k/ampdu.c diff --git a/drivers/net/wireless/celeno/cl8k/ampdu.c b/drivers/net/wireles= s/celeno/cl8k/ampdu.c new file mode 100644 index 000000000000..7116995b5059 --- /dev/null +++ b/drivers/net/wireless/celeno/cl8k/ampdu.c @@ -0,0 +1,344 @@ +// SPDX-License-Identifier: MIT +/* Copyright(c) 2019-2021, Celeno Communications Ltd. */ + +#include "ampdu.h" +#include "hw.h" +#include "fw/msg_tx.h" +#include "tx/tx_queue.h" +#include "tx/agg_cfm.h" +#include "recovery.h" +#include "tx/tx_inject.h" +#include "tx/baw.h" +#include "utils/math.h" +#include "band.h" +#include "rx/rx_reorder.h" +#ifdef CONFIG_CL_PCIE +#include "bus/pci/ipc.h" +#endif + +int cl_ampdu_rx_start(struct cl_hw *cl_hw, + struct cl_sta *cl_sta, + u16 tid, + u16 ssn, + u16 buf_size) +{ + /* @IEEE80211_AMPDU_RX_START: start RX aggregation */ + if (!cl_hw->conf->ci_agg_rx) + return -EOPNOTSUPP; + + cl_dbg_trace(cl_hw, "sta_idx [%u] tid [%u]\n", cl_sta->sta_idx, tid= ); + + buf_size =3D min(buf_size, cl_hw->conf->ce_max_agg_size_rx); + + if (cl_hw->conf->ci_fast_rx_en) + cl_rx_reorder_init(cl_hw, cl_sta, tid, buf_size); + + cl_msg_tx_ba_add(cl_hw, BA_AGMT_RX, cl_sta->sta_idx, tid, buf_size,= ssn); + + return 0; +} + +void cl_ampdu_rx_stop(struct cl_hw *cl_hw, + struct cl_sta *cl_sta, + u16 tid) +{ + /* @IEEE80211_AMPDU_RX_STOP: stop RX aggregation */ + cl_dbg_trace(cl_hw, "sta_idx [%u] tid [%u]\n", cl_sta->sta_idx, tid= ); + + if (cl_hw->conf->ci_fast_rx_en) + cl_rx_reorder_close(cl_sta, tid); +} + +int cl_ampdu_tx_start(struct cl_hw *cl_hw, + struct ieee80211_vif *vif, + struct cl_sta *cl_sta, + u16 tid, + u16 ssn) +{ + /* @IEEE80211_AMPDU_TX_START: start TX aggregation */ + struct mm_available_ba_txq_cfm *cfm =3D NULL; + int ret =3D 0; + + if (!ieee80211_hw_check(cl_hw->hw, AMPDU_AGGREGATION) || !cl_hw->co= nf->ci_agg_tx) + return -EOPNOTSUPP; + + if (!cl_txq_is_agg_available(cl_hw)) { + cl_dbg_warn(cl_hw, "No free aggregation queue for sta_idx [= %u] tid [%u]\n", + cl_sta->sta_idx, tid); + return -1; + } + + ret =3D cl_msg_tx_available_ba_txq(cl_hw, cl_sta->sta_idx, tid); + if (ret) + return ret; + + /* Read FW confirm message */ + cfm =3D (struct mm_available_ba_txq_cfm *)(cl_hw->msg_cfm_params[MM= _AVAILABLE_BA_TXQ_CFM]); + if (!cfm) + return -ENOMSG; + + /* Check if status is valid */ + if (cfm->status !=3D BA_TXQUEUE_INVALID && cfm->status !=3D BA_TXQU= EUE_VALID) { + cl_dbg_verbose(cl_hw, "Status Error (%u)\n", cfm->status); + cl_msg_tx_free_cfm_params(cl_hw, MM_AVAILABLE_BA_TXQ_CFM); + return -EIO; + } + + if (cfm->status =3D=3D BA_TXQUEUE_INVALID) { + cl_dbg_warn(cl_hw, "BA_TXQUEUE_INVALID - sta_idx [%u] tid [= %u]\n", + cfm->sta_idx, cfm->tid); + cl_msg_tx_free_cfm_params(cl_hw, MM_AVAILABLE_BA_TXQ_CFM); + return -1; + } + + cl_msg_tx_free_cfm_params(cl_hw, MM_AVAILABLE_BA_TXQ_CFM); + cl_txq_agg_request_add(cl_hw, cl_sta->sta_idx, tid); + cl_baw_start(&cl_sta->baws[tid], ssn); + + /* Mandatory callback once setup preparations are done at lower lev= el */ + ieee80211_start_tx_ba_cb_irqsafe(vif, cl_sta->addr, tid); + + return 0; +} + +int cl_ampdu_tx_operational(struct cl_hw *cl_hw, + struct cl_sta *cl_sta, + u16 tid, + u16 buf_size, + bool amsdu_supported) +{ + /* @IEEE80211_AMPDU_TX_OPERATIONAL: TX aggregation has become opera= tional */ + struct mm_ba_add_cfm *cfm =3D NULL; + struct cl_baw *baw =3D &cl_sta->baws[tid]; + u16 ssn =3D baw->ssn; + int ret =3D 0; + + buf_size =3D min(buf_size, cl_hw->conf->ce_max_agg_size_tx); + + /* Send MM_BA_ADD_TX_REQ message to firmware */ + ret =3D cl_msg_tx_ba_add(cl_hw, BA_AGMT_TX, cl_sta->sta_idx, tid, b= uf_size, ssn); + if (ret) + return ret; + + /* Handle message confirmation */ + cfm =3D (struct mm_ba_add_cfm *)(cl_hw->msg_cfm_params[MM_BA_ADD_TX= _CFM]); + if (!cfm) + return -ENOMSG; + + if (cfm->status !=3D BA_AGMT_ESTABLISHED) { + cl_dbg_verbose(cl_hw, "Status Error (%u)\n", cfm->status); + cl_msg_tx_free_cfm_params(cl_hw, MM_BA_ADD_TX_CFM); + cl_txq_agg_request_del(cl_hw, cl_sta->sta_idx, tid); + return -EIO; + } + + cl_baw_operational(cl_hw, baw, cfm->agg_idx, amsdu_supported); + cl_agg_cfm_set_ssn(cl_hw, ssn, cfm->agg_idx); +#ifdef CONFIG_CL_PCIE + cl_hw->ipc_env->ring_indices_elem->indices->new_ssn_idx[cfm->agg_id= x] =3D cpu_to_le16(ssn); +#endif + + if (amsdu_supported) + cl_tx_amsdu_set_max_len(cl_hw, cl_sta, tid); + else + cl_dbg_trace(cl_hw, "AMSDU not supported - sta_idx=3D%u\n",= cl_sta->sta_idx); + + cl_txq_agg_alloc(cl_hw, cl_sta, cfm, buf_size); + cl_msg_tx_free_cfm_params(cl_hw, MM_BA_ADD_TX_CFM); + + return 0; +} + +void _cl_ampdu_tx_stop(struct cl_hw *cl_hw, + struct cl_tx_queue *tx_queue, + struct cl_sta *cl_sta, + u8 tid) +{ + struct mm_ba_del_cfm *cfm =3D NULL; + u8 fw_agg_idx =3D tx_queue->index; + + if (cl_recovery_in_progress(cl_hw)) + goto out; + + /* + * TX stop flow: + * 1) Flush TX queues - done in cl_ampdu_tx_stop() + * 2) Poll confirmation queue and clear enhanced TIM + * 3) Send MM_STA_DEL_REQ message to firmware + * 4) Poll again confirmation and flush confirmation queue + * 5) Reset write index + */ + cl_agg_cfm_poll_empty(cl_hw, fw_agg_idx, false); + + /* Send MM_BA_DEL_REQ message to firmware */ + if (cl_msg_tx_ba_del(cl_hw, cl_sta->sta_idx, tid)) + goto out; + + cfm =3D (struct mm_ba_del_cfm *)(cl_hw->msg_cfm_params[MM_BA_DEL_CF= M]); + if (!cfm) { + cl_dbg_err(cl_hw, "Unable to fetch CFM\n"); + goto out; + } + + /* Check confirmation status */ + if (cfm->status !=3D BA_AGMT_DELETED && cfm->status !=3D BA_AGMT_DO= ES_NOT_EXIST) + cl_dbg_verbose(cl_hw, "Status Error (%u)\n", cfm->status); + + cl_msg_tx_free_cfm_params(cl_hw, MM_BA_DEL_CFM); + +out: + cl_agg_cfm_poll_empty(cl_hw, fw_agg_idx, true); + cl_txq_agg_free(cl_hw, tx_queue, cl_sta, tid); + +#ifdef CONFIG_CL_PCIE + /* Reset the synchronization counters between the fw and the IPC la= yer */ + cl_hw->ipc_env->ring_indices_elem->indices->txdesc_write_idx.agg[fw= _agg_idx] =3D 0; +#endif +} + +int cl_ampdu_tx_stop(struct cl_hw *cl_hw, + struct ieee80211_vif *vif, + enum ieee80211_ampdu_mlme_action action, + struct cl_sta *cl_sta, + u16 tid) +{ + /* + * @IEEE80211_AMPDU_TX_STOP_CONT: stop TX aggregation but continue = transmitting + * queued packets, now unaggregated. After all packets are tra= nsmitted the + * driver has to call ieee80211_stop_tx_ba_cb_irqsafe(). + * @IEEE80211_AMPDU_TX_STOP_FLUSH: stop TX aggregation and flush al= l packets, + * called when the station is removed. There's no need or reas= on to call + * ieee80211_stop_tx_ba_cb_irqsafe() in this case as mac80211 = assumes the + * session is gone and removes the station. + * @IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: called when TX aggregation = is stopped + * but the driver hasn't called ieee80211_stop_tx_ba_cb_irqsaf= e() yet and + * now the connection is dropped and the station will be remov= ed. Drivers + * should clean up and drop remaining packets when this is cal= led. + */ + + /* !!! Comment in agg-tx.c, ___ieee80211_stop_tx_ba_session(): !!= ! + * !!! HW shall not deny going back to legacy !!= ! + * !!! Therefore cl_ampdu_tx_stop() always returns 0 !!= ! + */ + + struct cl_tx_queue *tx_queue =3D cl_sta->agg_tx_queues[tid]; + struct cl_baw *baw =3D &cl_sta->baws[tid]; + + spin_lock_bh(&cl_hw->tx_lock_agg); + + cl_baw_stop(baw); + cl_txq_agg_request_del(cl_hw, cl_sta->sta_idx, tid); + + /* Check if BA session exist */ + if (!tx_queue) { + spin_unlock_bh(&cl_hw->tx_lock_agg); + + if (!cl_recovery_in_progress(cl_hw)) + cl_dbg_warn(cl_hw, "Queue doesn't exist - sta_idx [= %u] tid [%u]\n", + cl_sta->sta_idx, tid); + + goto out; + } + + if (action =3D=3D IEEE80211_AMPDU_TX_STOP_CONT) { + /* + * The order of flow here is very important here to avoid r= eorder problem! + * 1) Take single lock to block single traffic + * 2) Stop agg traffic. + * 3) Transfer agg-to-single and push all skbs from agg que= ue to single queue. + * 4) Transfer BA window pending queue to single queue. + * 5) Release single lock + */ + spin_lock_bh(&cl_hw->tx_lock_single); + cl_txq_agg_stop(cl_sta, tid); + cl_txq_transfer_agg_to_single(cl_hw, tx_queue); + cl_baw_pending_to_single(cl_hw, cl_sta, baw); + spin_unlock_bh(&cl_hw->tx_lock_single); + } else { + cl_txq_agg_stop(cl_sta, tid); + cl_txq_flush(cl_hw, tx_queue); + cl_baw_pending_purge(baw); + } + + cl_tx_amsdu_anchor_reset(&cl_sta->amsdu_anchor[tid]); + + spin_unlock_bh(&cl_hw->tx_lock_agg); + + _cl_ampdu_tx_stop(cl_hw, tx_queue, cl_sta, tid); + +out: + /* Mandatory callback once we've made our own tear down ops */ + if (action !=3D IEEE80211_AMPDU_TX_STOP_FLUSH) + ieee80211_stop_tx_ba_cb_irqsafe(vif, cl_sta->addr, tid); + + return 0; +} + +#define HE_MAC_CAP3_MAX_AMPDU_LEN_EXP_OFFSET 3 +#define HE_EXP_MAX 22 /* 2 ^ 22 =3D 4194304 < 6500631 */ + +static void _cl_ampdu_size_exp(struct ieee80211_sta *sta, + u8 *ampdu_exp_he, + u8 *ampdu_exp_vht, + u8 *ampdu_exp_ht) +{ + struct ieee80211_sta_he_cap *he_cap =3D &sta->he_cap; + u8 mac_cap_info3 =3D he_cap->he_cap_elem.mac_cap_info[3]; + u8 he_exp; + + if (sta->ht_cap.ht_supported) + *ampdu_exp_ht =3D IEEE80211_HT_MAX_AMPDU_FACTOR + sta->ht_c= ap.ampdu_factor; + + if (sta->vht_cap.vht_supported) { + u32 vht_exp =3D (sta->vht_cap.cap & + IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT= _MASK) >> + IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT; + + *ampdu_exp_vht =3D IEEE80211_HT_MAX_AMPDU_FACTOR + vht_exp; + } + + he_exp =3D (mac_cap_info3 & IEEE80211_HE_MAC_CAP3_MAX_AMPDU_LEN_EXP= _MASK) >> + HE_MAC_CAP3_MAX_AMPDU_LEN_EXP_OFFSET; + + if (sta->vht_cap.vht_supported) { + if (he_exp) + *ampdu_exp_he =3D min(IEEE80211_HE_VHT_MAX_AMPDU_FA= CTOR + he_exp, HE_EXP_MAX); + else + *ampdu_exp_he =3D *ampdu_exp_vht; + } else if (sta->ht_cap.ht_supported) { + if (he_exp) + *ampdu_exp_he =3D IEEE80211_HE_HT_MAX_AMPDU_FACTOR = + he_exp; + else + *ampdu_exp_he =3D *ampdu_exp_ht; + } +} + +static void _cl_ampdu_size_exp_6g(struct ieee80211_sta *sta, u8 *ampdu_exp= _he) +{ + u8 mac_cap_info3 =3D sta->he_cap.he_cap_elem.mac_cap_info[3]; + u8 he_exp_ext =3D (mac_cap_info3 & IEEE80211_HE_MAC_CAP3_MAX_AMPDU_= LEN_EXP_MASK) >> + HE_MAC_CAP3_MAX_AMPDU_LEN_EXP_OFFSET; + + if (he_exp_ext) { + *ampdu_exp_he =3D min(IEEE80211_HE_VHT_MAX_AMPDU_FACTOR + h= e_exp_ext, HE_EXP_MAX); + } else { + struct ieee80211_he_6ghz_capa *he_6g_cap =3D &sta->he_6ghz_= capa; + u8 he_exp_6ghz =3D (he_6g_cap->capa & HE_6GHZ_CAP_MAX_AMPDU= _LEN_EXP_MASK) >> + HE_6GHZ_CAP_MAX_AMPDU_LEN_EXP_OFFSET; + + *ampdu_exp_he =3D min(HE_6GHZ_CAP_MAX_AMPDU_LEN_FACTOR + he= _exp_6ghz, HE_EXP_MAX); + } +} + +void cl_ampdu_size_exp(struct cl_hw *cl_hw, struct ieee80211_sta *sta, + u8 *ampdu_exp_he, u8 *ampdu_exp_vht, u8 *ampdu_exp_h= t) +{ + if (cl_band_is_6g(cl_hw)) + _cl_ampdu_size_exp_6g(sta, ampdu_exp_he); + else + _cl_ampdu_size_exp(sta, ampdu_exp_he, ampdu_exp_vht, ampdu_= exp_ht); + + cl_dbg_info(cl_hw, "ampdu_size_exp: he =3D %u, vht =3D %u, ht =3D %= u\n", + *ampdu_exp_he, *ampdu_exp_vht, *ampdu_exp_ht); +} + -- 2.30.0 ________________________________ The information transmitted is intended only for the person or entity to wh= ich it is addressed and may contain confidential and/or privileged material= . Any retransmission, dissemination, copying or other use of, or taking of = any action in reliance upon this information is prohibited. If you received= this in error, please contact the sender and delete the material from any = computer. Nothing contained herein shall be deemed as a representation, war= ranty or a commitment by Celeno. No warranties are expressed or implied, in= cluding, but not limited to, any implied warranties of non-infringement, me= rchantability and fitness for a particular purpose. ________________________________