| /* |
| * Marvell Wireless LAN device driver: WMM |
| * |
| * Copyright (C) 2011, Marvell International Ltd. |
| * |
| * This software file (the "File") is distributed by Marvell International |
| * Ltd. under the terms of the GNU General Public License Version 2, June 1991 |
| * (the "License"). You may use, redistribute and/or modify this File in |
| * accordance with the terms and conditions of the License, a copy of which |
| * is available by writing to the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the |
| * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt. |
| * |
| * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE |
| * ARE EXPRESSLY DISCLAIMED. The License provides additional details about |
| * this warranty disclaimer. |
| */ |
| |
| #include "decl.h" |
| #include "ioctl.h" |
| #include "util.h" |
| #include "fw.h" |
| #include "main.h" |
| #include "wmm.h" |
| #include "11n.h" |
| |
| |
| /* Maximum value FW can accept for driver delay in packet transmission */ |
| #define DRV_PKT_DELAY_TO_FW_MAX 512 |
| |
| |
| #define WMM_QUEUED_PACKET_LOWER_LIMIT 180 |
| |
| #define WMM_QUEUED_PACKET_UPPER_LIMIT 200 |
| |
| /* Offset for TOS field in the IP header */ |
| #define IPTOS_OFFSET 5 |
| |
| /* WMM information IE */ |
| static const u8 wmm_info_ie[] = { WLAN_EID_VENDOR_SPECIFIC, 0x07, |
| 0x00, 0x50, 0xf2, 0x02, |
| 0x00, 0x01, 0x00 |
| }; |
| |
| static const u8 wmm_aci_to_qidx_map[] = { WMM_AC_BE, |
| WMM_AC_BK, |
| WMM_AC_VI, |
| WMM_AC_VO |
| }; |
| |
| static u8 tos_to_tid[] = { |
| /* TID DSCP_P2 DSCP_P1 DSCP_P0 WMM_AC */ |
| 0x01, /* 0 1 0 AC_BK */ |
| 0x02, /* 0 0 0 AC_BK */ |
| 0x00, /* 0 0 1 AC_BE */ |
| 0x03, /* 0 1 1 AC_BE */ |
| 0x04, /* 1 0 0 AC_VI */ |
| 0x05, /* 1 0 1 AC_VI */ |
| 0x06, /* 1 1 0 AC_VO */ |
| 0x07 /* 1 1 1 AC_VO */ |
| }; |
| |
| /* |
| * This table inverses the tos_to_tid operation to get a priority |
| * which is in sequential order, and can be compared. |
| * Use this to compare the priority of two different TIDs. |
| */ |
| static u8 tos_to_tid_inv[] = { |
| 0x02, /* from tos_to_tid[2] = 0 */ |
| 0x00, /* from tos_to_tid[0] = 1 */ |
| 0x01, /* from tos_to_tid[1] = 2 */ |
| 0x03, |
| 0x04, |
| 0x05, |
| 0x06, |
| 0x07}; |
| |
| static u8 ac_to_tid[4][2] = { {1, 2}, {0, 3}, {4, 5}, {6, 7} }; |
| |
| /* |
| * This function debug prints the priority parameters for a WMM AC. |
| */ |
| static void |
| mwifiex_wmm_ac_debug_print(const struct ieee_types_wmm_ac_parameters *ac_param) |
| { |
| const char *ac_str[] = { "BK", "BE", "VI", "VO" }; |
| |
| pr_debug("info: WMM AC_%s: ACI=%d, ACM=%d, Aifsn=%d, " |
| "EcwMin=%d, EcwMax=%d, TxopLimit=%d\n", |
| ac_str[wmm_aci_to_qidx_map[(ac_param->aci_aifsn_bitmap |
| & MWIFIEX_ACI) >> 5]], |
| (ac_param->aci_aifsn_bitmap & MWIFIEX_ACI) >> 5, |
| (ac_param->aci_aifsn_bitmap & MWIFIEX_ACM) >> 4, |
| ac_param->aci_aifsn_bitmap & MWIFIEX_AIFSN, |
| ac_param->ecw_bitmap & MWIFIEX_ECW_MIN, |
| (ac_param->ecw_bitmap & MWIFIEX_ECW_MAX) >> 4, |
| le16_to_cpu(ac_param->tx_op_limit)); |
| } |
| |
| /* |
| * This function allocates a route address list. |
| * |
| * The function also initializes the list with the provided RA. |
| */ |
| static struct mwifiex_ra_list_tbl * |
| mwifiex_wmm_allocate_ralist_node(struct mwifiex_adapter *adapter, u8 *ra) |
| { |
| struct mwifiex_ra_list_tbl *ra_list; |
| |
| ra_list = kzalloc(sizeof(struct mwifiex_ra_list_tbl), GFP_ATOMIC); |
| if (!ra_list) |
| return NULL; |
| |
| INIT_LIST_HEAD(&ra_list->list); |
| skb_queue_head_init(&ra_list->skb_head); |
| |
| memcpy(ra_list->ra, ra, ETH_ALEN); |
| |
| ra_list->total_pkts_size = 0; |
| |
| dev_dbg(adapter->dev, "info: allocated ra_list %p\n", ra_list); |
| |
| return ra_list; |
| } |
| |
| /* This function returns random no between 16 and 32 to be used as threshold |
| * for no of packets after which BA setup is initiated. |
| */ |
| static u8 mwifiex_get_random_ba_threshold(void) |
| { |
| u32 sec, usec; |
| struct timeval ba_tstamp; |
| u8 ba_threshold; |
| |
| /* setup ba_packet_threshold here random number between |
| * [BA_SETUP_PACKET_OFFSET, |
| * BA_SETUP_PACKET_OFFSET+BA_SETUP_MAX_PACKET_THRESHOLD-1] |
| */ |
| |
| do_gettimeofday(&ba_tstamp); |
| sec = (ba_tstamp.tv_sec & 0xFFFF) + (ba_tstamp.tv_sec >> 16); |
| usec = (ba_tstamp.tv_usec & 0xFFFF) + (ba_tstamp.tv_usec >> 16); |
| ba_threshold = (((sec << 16) + usec) % BA_SETUP_MAX_PACKET_THRESHOLD) |
| + BA_SETUP_PACKET_OFFSET; |
| |
| return ba_threshold; |
| } |
| |
| /* |
| * This function allocates and adds a RA list for all TIDs |
| * with the given RA. |
| */ |
| void |
| mwifiex_ralist_add(struct mwifiex_private *priv, u8 *ra) |
| { |
| int i; |
| struct mwifiex_ra_list_tbl *ra_list; |
| struct mwifiex_adapter *adapter = priv->adapter; |
| struct mwifiex_sta_node *node; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&priv->sta_list_spinlock, flags); |
| node = mwifiex_get_sta_entry(priv, ra); |
| spin_unlock_irqrestore(&priv->sta_list_spinlock, flags); |
| |
| for (i = 0; i < MAX_NUM_TID; ++i) { |
| ra_list = mwifiex_wmm_allocate_ralist_node(adapter, ra); |
| dev_dbg(adapter->dev, "info: created ra_list %p\n", ra_list); |
| |
| if (!ra_list) |
| break; |
| |
| ra_list->is_11n_enabled = 0; |
| if (!mwifiex_queuing_ra_based(priv)) { |
| ra_list->is_11n_enabled = IS_11N_ENABLED(priv); |
| } else { |
| ra_list->is_11n_enabled = |
| mwifiex_is_sta_11n_enabled(priv, node); |
| if (ra_list->is_11n_enabled) |
| ra_list->max_amsdu = node->max_amsdu; |
| } |
| |
| dev_dbg(adapter->dev, "data: ralist %p: is_11n_enabled=%d\n", |
| ra_list, ra_list->is_11n_enabled); |
| |
| if (ra_list->is_11n_enabled) { |
| ra_list->pkt_count = 0; |
| ra_list->ba_packet_thr = |
| mwifiex_get_random_ba_threshold(); |
| } |
| list_add_tail(&ra_list->list, |
| &priv->wmm.tid_tbl_ptr[i].ra_list); |
| |
| if (!priv->wmm.tid_tbl_ptr[i].ra_list_curr) |
| priv->wmm.tid_tbl_ptr[i].ra_list_curr = ra_list; |
| } |
| } |
| |
| /* |
| * This function sets the WMM queue priorities to their default values. |
| */ |
| static void mwifiex_wmm_default_queue_priorities(struct mwifiex_private *priv) |
| { |
| /* Default queue priorities: VO->VI->BE->BK */ |
| priv->wmm.queue_priority[0] = WMM_AC_VO; |
| priv->wmm.queue_priority[1] = WMM_AC_VI; |
| priv->wmm.queue_priority[2] = WMM_AC_BE; |
| priv->wmm.queue_priority[3] = WMM_AC_BK; |
| } |
| |
| /* |
| * This function map ACs to TIDs. |
| */ |
| static void |
| mwifiex_wmm_queue_priorities_tid(struct mwifiex_wmm_desc *wmm) |
| { |
| u8 *queue_priority = wmm->queue_priority; |
| int i; |
| |
| for (i = 0; i < 4; ++i) { |
| tos_to_tid[7 - (i * 2)] = ac_to_tid[queue_priority[i]][1]; |
| tos_to_tid[6 - (i * 2)] = ac_to_tid[queue_priority[i]][0]; |
| } |
| |
| for (i = 0; i < MAX_NUM_TID; ++i) |
| tos_to_tid_inv[tos_to_tid[i]] = (u8)i; |
| |
| atomic_set(&wmm->highest_queued_prio, HIGH_PRIO_TID); |
| } |
| |
| /* |
| * This function initializes WMM priority queues. |
| */ |
| void |
| mwifiex_wmm_setup_queue_priorities(struct mwifiex_private *priv, |
| struct ieee_types_wmm_parameter *wmm_ie) |
| { |
| u16 cw_min, avg_back_off, tmp[4]; |
| u32 i, j, num_ac; |
| u8 ac_idx; |
| |
| if (!wmm_ie || !priv->wmm_enabled) { |
| /* WMM is not enabled, just set the defaults and return */ |
| mwifiex_wmm_default_queue_priorities(priv); |
| return; |
| } |
| |
| dev_dbg(priv->adapter->dev, "info: WMM Parameter IE: version=%d, " |
| "qos_info Parameter Set Count=%d, Reserved=%#x\n", |
| wmm_ie->vend_hdr.version, wmm_ie->qos_info_bitmap & |
| IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK, |
| wmm_ie->reserved); |
| |
| for (num_ac = 0; num_ac < ARRAY_SIZE(wmm_ie->ac_params); num_ac++) { |
| u8 ecw = wmm_ie->ac_params[num_ac].ecw_bitmap; |
| u8 aci_aifsn = wmm_ie->ac_params[num_ac].aci_aifsn_bitmap; |
| cw_min = (1 << (ecw & MWIFIEX_ECW_MIN)) - 1; |
| avg_back_off = (cw_min >> 1) + (aci_aifsn & MWIFIEX_AIFSN); |
| |
| ac_idx = wmm_aci_to_qidx_map[(aci_aifsn & MWIFIEX_ACI) >> 5]; |
| priv->wmm.queue_priority[ac_idx] = ac_idx; |
| tmp[ac_idx] = avg_back_off; |
| |
| dev_dbg(priv->adapter->dev, |
| "info: WMM: CWmax=%d CWmin=%d Avg Back-off=%d\n", |
| (1 << ((ecw & MWIFIEX_ECW_MAX) >> 4)) - 1, |
| cw_min, avg_back_off); |
| mwifiex_wmm_ac_debug_print(&wmm_ie->ac_params[num_ac]); |
| } |
| |
| /* Bubble sort */ |
| for (i = 0; i < num_ac; i++) { |
| for (j = 1; j < num_ac - i; j++) { |
| if (tmp[j - 1] > tmp[j]) { |
| swap(tmp[j - 1], tmp[j]); |
| swap(priv->wmm.queue_priority[j - 1], |
| priv->wmm.queue_priority[j]); |
| } else if (tmp[j - 1] == tmp[j]) { |
| if (priv->wmm.queue_priority[j - 1] |
| < priv->wmm.queue_priority[j]) |
| swap(priv->wmm.queue_priority[j - 1], |
| priv->wmm.queue_priority[j]); |
| } |
| } |
| } |
| |
| mwifiex_wmm_queue_priorities_tid(&priv->wmm); |
| } |
| |
| /* |
| * This function evaluates whether or not an AC is to be downgraded. |
| * |
| * In case the AC is not enabled, the highest AC is returned that is |
| * enabled and does not require admission control. |
| */ |
| static enum mwifiex_wmm_ac_e |
| mwifiex_wmm_eval_downgrade_ac(struct mwifiex_private *priv, |
| enum mwifiex_wmm_ac_e eval_ac) |
| { |
| int down_ac; |
| enum mwifiex_wmm_ac_e ret_ac; |
| struct mwifiex_wmm_ac_status *ac_status; |
| |
| ac_status = &priv->wmm.ac_status[eval_ac]; |
| |
| if (!ac_status->disabled) |
| /* Okay to use this AC, its enabled */ |
| return eval_ac; |
| |
| /* Setup a default return value of the lowest priority */ |
| ret_ac = WMM_AC_BK; |
| |
| /* |
| * Find the highest AC that is enabled and does not require |
| * admission control. The spec disallows downgrading to an AC, |
| * which is enabled due to a completed admission control. |
| * Unadmitted traffic is not to be sent on an AC with admitted |
| * traffic. |
| */ |
| for (down_ac = WMM_AC_BK; down_ac < eval_ac; down_ac++) { |
| ac_status = &priv->wmm.ac_status[down_ac]; |
| |
| if (!ac_status->disabled && !ac_status->flow_required) |
| /* AC is enabled and does not require admission |
| control */ |
| ret_ac = (enum mwifiex_wmm_ac_e) down_ac; |
| } |
| |
| return ret_ac; |
| } |
| |
| /* |
| * This function downgrades WMM priority queue. |
| */ |
| void |
| mwifiex_wmm_setup_ac_downgrade(struct mwifiex_private *priv) |
| { |
| int ac_val; |
| |
| dev_dbg(priv->adapter->dev, "info: WMM: AC Priorities:" |
| "BK(0), BE(1), VI(2), VO(3)\n"); |
| |
| if (!priv->wmm_enabled) { |
| /* WMM is not enabled, default priorities */ |
| for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++) |
| priv->wmm.ac_down_graded_vals[ac_val] = |
| (enum mwifiex_wmm_ac_e) ac_val; |
| } else { |
| for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++) { |
| priv->wmm.ac_down_graded_vals[ac_val] |
| = mwifiex_wmm_eval_downgrade_ac(priv, |
| (enum mwifiex_wmm_ac_e) ac_val); |
| dev_dbg(priv->adapter->dev, |
| "info: WMM: AC PRIO %d maps to %d\n", |
| ac_val, priv->wmm.ac_down_graded_vals[ac_val]); |
| } |
| } |
| } |
| |
| /* |
| * This function converts the IP TOS field to an WMM AC |
| * Queue assignment. |
| */ |
| static enum mwifiex_wmm_ac_e |
| mwifiex_wmm_convert_tos_to_ac(struct mwifiex_adapter *adapter, u32 tos) |
| { |
| /* Map of TOS UP values to WMM AC */ |
| const enum mwifiex_wmm_ac_e tos_to_ac[] = { WMM_AC_BE, |
| WMM_AC_BK, |
| WMM_AC_BK, |
| WMM_AC_BE, |
| WMM_AC_VI, |
| WMM_AC_VI, |
| WMM_AC_VO, |
| WMM_AC_VO |
| }; |
| |
| if (tos >= ARRAY_SIZE(tos_to_ac)) |
| return WMM_AC_BE; |
| |
| return tos_to_ac[tos]; |
| } |
| |
| /* |
| * This function evaluates a given TID and downgrades it to a lower |
| * TID if the WMM Parameter IE received from the AP indicates that the |
| * AP is disabled (due to call admission control (ACM bit). Mapping |
| * of TID to AC is taken care of internally. |
| */ |
| static u8 |
| mwifiex_wmm_downgrade_tid(struct mwifiex_private *priv, u32 tid) |
| { |
| enum mwifiex_wmm_ac_e ac, ac_down; |
| u8 new_tid; |
| |
| ac = mwifiex_wmm_convert_tos_to_ac(priv->adapter, tid); |
| ac_down = priv->wmm.ac_down_graded_vals[ac]; |
| |
| /* Send the index to tid array, picking from the array will be |
| * taken care by dequeuing function |
| */ |
| new_tid = ac_to_tid[ac_down][tid % 2]; |
| |
| return new_tid; |
| } |
| |
| /* |
| * This function initializes the WMM state information and the |
| * WMM data path queues. |
| */ |
| void |
| mwifiex_wmm_init(struct mwifiex_adapter *adapter) |
| { |
| int i, j; |
| struct mwifiex_private *priv; |
| |
| for (j = 0; j < adapter->priv_num; ++j) { |
| priv = adapter->priv[j]; |
| if (!priv) |
| continue; |
| |
| for (i = 0; i < MAX_NUM_TID; ++i) { |
| priv->aggr_prio_tbl[i].amsdu = tos_to_tid_inv[i]; |
| priv->aggr_prio_tbl[i].ampdu_ap = tos_to_tid_inv[i]; |
| priv->aggr_prio_tbl[i].ampdu_user = tos_to_tid_inv[i]; |
| priv->wmm.tid_tbl_ptr[i].ra_list_curr = NULL; |
| } |
| |
| priv->aggr_prio_tbl[6].amsdu |
| = priv->aggr_prio_tbl[6].ampdu_ap |
| = priv->aggr_prio_tbl[6].ampdu_user |
| = BA_STREAM_NOT_ALLOWED; |
| |
| priv->aggr_prio_tbl[7].amsdu = priv->aggr_prio_tbl[7].ampdu_ap |
| = priv->aggr_prio_tbl[7].ampdu_user |
| = BA_STREAM_NOT_ALLOWED; |
| |
| mwifiex_set_ba_params(priv); |
| mwifiex_reset_11n_rx_seq_num(priv); |
| |
| atomic_set(&priv->wmm.tx_pkts_queued, 0); |
| atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID); |
| } |
| } |
| |
| /* |
| * This function checks if WMM Tx queue is empty. |
| */ |
| int |
| mwifiex_wmm_lists_empty(struct mwifiex_adapter *adapter) |
| { |
| int i; |
| struct mwifiex_private *priv; |
| |
| for (i = 0; i < adapter->priv_num; ++i) { |
| priv = adapter->priv[i]; |
| if (priv && atomic_read(&priv->wmm.tx_pkts_queued)) |
| return false; |
| } |
| |
| return true; |
| } |
| |
| /* |
| * This function deletes all packets in an RA list node. |
| * |
| * The packet sent completion callback handler are called with |
| * status failure, after they are dequeued to ensure proper |
| * cleanup. The RA list node itself is freed at the end. |
| */ |
| static void |
| mwifiex_wmm_del_pkts_in_ralist_node(struct mwifiex_private *priv, |
| struct mwifiex_ra_list_tbl *ra_list) |
| { |
| struct mwifiex_adapter *adapter = priv->adapter; |
| struct sk_buff *skb, *tmp; |
| |
| skb_queue_walk_safe(&ra_list->skb_head, skb, tmp) |
| mwifiex_write_data_complete(adapter, skb, 0, -1); |
| } |
| |
| /* |
| * This function deletes all packets in an RA list. |
| * |
| * Each nodes in the RA list are freed individually first, and then |
| * the RA list itself is freed. |
| */ |
| static void |
| mwifiex_wmm_del_pkts_in_ralist(struct mwifiex_private *priv, |
| struct list_head *ra_list_head) |
| { |
| struct mwifiex_ra_list_tbl *ra_list; |
| |
| list_for_each_entry(ra_list, ra_list_head, list) |
| mwifiex_wmm_del_pkts_in_ralist_node(priv, ra_list); |
| } |
| |
| /* |
| * This function deletes all packets in all RA lists. |
| */ |
| static void mwifiex_wmm_cleanup_queues(struct mwifiex_private *priv) |
| { |
| int i; |
| |
| for (i = 0; i < MAX_NUM_TID; i++) |
| mwifiex_wmm_del_pkts_in_ralist(priv, &priv->wmm.tid_tbl_ptr[i]. |
| ra_list); |
| |
| atomic_set(&priv->wmm.tx_pkts_queued, 0); |
| atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID); |
| } |
| |
| /* |
| * This function deletes all route addresses from all RA lists. |
| */ |
| static void mwifiex_wmm_delete_all_ralist(struct mwifiex_private *priv) |
| { |
| struct mwifiex_ra_list_tbl *ra_list, *tmp_node; |
| int i; |
| |
| for (i = 0; i < MAX_NUM_TID; ++i) { |
| dev_dbg(priv->adapter->dev, |
| "info: ra_list: freeing buf for tid %d\n", i); |
| list_for_each_entry_safe(ra_list, tmp_node, |
| &priv->wmm.tid_tbl_ptr[i].ra_list, |
| list) { |
| list_del(&ra_list->list); |
| kfree(ra_list); |
| } |
| |
| INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[i].ra_list); |
| |
| priv->wmm.tid_tbl_ptr[i].ra_list_curr = NULL; |
| } |
| } |
| |
| /* |
| * This function cleans up the Tx and Rx queues. |
| * |
| * Cleanup includes - |
| * - All packets in RA lists |
| * - All entries in Rx reorder table |
| * - All entries in Tx BA stream table |
| * - MPA buffer (if required) |
| * - All RA lists |
| */ |
| void |
| mwifiex_clean_txrx(struct mwifiex_private *priv) |
| { |
| unsigned long flags; |
| |
| mwifiex_11n_cleanup_reorder_tbl(priv); |
| spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags); |
| |
| mwifiex_wmm_cleanup_queues(priv); |
| mwifiex_11n_delete_all_tx_ba_stream_tbl(priv); |
| |
| if (priv->adapter->if_ops.cleanup_mpa_buf) |
| priv->adapter->if_ops.cleanup_mpa_buf(priv->adapter); |
| |
| mwifiex_wmm_delete_all_ralist(priv); |
| memcpy(tos_to_tid, ac_to_tid, sizeof(tos_to_tid)); |
| |
| if (priv->adapter->if_ops.clean_pcie_ring) |
| priv->adapter->if_ops.clean_pcie_ring(priv->adapter); |
| spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags); |
| } |
| |
| /* |
| * This function retrieves a particular RA list node, matching with the |
| * given TID and RA address. |
| */ |
| static struct mwifiex_ra_list_tbl * |
| mwifiex_wmm_get_ralist_node(struct mwifiex_private *priv, u8 tid, |
| u8 *ra_addr) |
| { |
| struct mwifiex_ra_list_tbl *ra_list; |
| |
| list_for_each_entry(ra_list, &priv->wmm.tid_tbl_ptr[tid].ra_list, |
| list) { |
| if (!memcmp(ra_list->ra, ra_addr, ETH_ALEN)) |
| return ra_list; |
| } |
| |
| return NULL; |
| } |
| |
| /* |
| * This function retrieves an RA list node for a given TID and |
| * RA address pair. |
| * |
| * If no such node is found, a new node is added first and then |
| * retrieved. |
| */ |
| static struct mwifiex_ra_list_tbl * |
| mwifiex_wmm_get_queue_raptr(struct mwifiex_private *priv, u8 tid, u8 *ra_addr) |
| { |
| struct mwifiex_ra_list_tbl *ra_list; |
| |
| ra_list = mwifiex_wmm_get_ralist_node(priv, tid, ra_addr); |
| if (ra_list) |
| return ra_list; |
| mwifiex_ralist_add(priv, ra_addr); |
| |
| return mwifiex_wmm_get_ralist_node(priv, tid, ra_addr); |
| } |
| |
| /* |
| * This function checks if a particular RA list node exists in a given TID |
| * table index. |
| */ |
| int |
| mwifiex_is_ralist_valid(struct mwifiex_private *priv, |
| struct mwifiex_ra_list_tbl *ra_list, int ptr_index) |
| { |
| struct mwifiex_ra_list_tbl *rlist; |
| |
| list_for_each_entry(rlist, &priv->wmm.tid_tbl_ptr[ptr_index].ra_list, |
| list) { |
| if (rlist == ra_list) |
| return true; |
| } |
| |
| return false; |
| } |
| |
| /* |
| * This function adds a packet to WMM queue. |
| * |
| * In disconnected state the packet is immediately dropped and the |
| * packet send completion callback is called with status failure. |
| * |
| * Otherwise, the correct RA list node is located and the packet |
| * is queued at the list tail. |
| */ |
| void |
| mwifiex_wmm_add_buf_txqueue(struct mwifiex_private *priv, |
| struct sk_buff *skb) |
| { |
| struct mwifiex_adapter *adapter = priv->adapter; |
| u32 tid; |
| struct mwifiex_ra_list_tbl *ra_list; |
| u8 ra[ETH_ALEN], tid_down; |
| unsigned long flags; |
| |
| if (!priv->media_connected && !mwifiex_is_skb_mgmt_frame(skb)) { |
| dev_dbg(adapter->dev, "data: drop packet in disconnect\n"); |
| mwifiex_write_data_complete(adapter, skb, 0, -1); |
| return; |
| } |
| |
| tid = skb->priority; |
| |
| spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags); |
| |
| tid_down = mwifiex_wmm_downgrade_tid(priv, tid); |
| |
| /* In case of infra as we have already created the list during |
| association we just don't have to call get_queue_raptr, we will |
| have only 1 raptr for a tid in case of infra */ |
| if (!mwifiex_queuing_ra_based(priv) && |
| !mwifiex_is_skb_mgmt_frame(skb)) { |
| if (!list_empty(&priv->wmm.tid_tbl_ptr[tid_down].ra_list)) |
| ra_list = list_first_entry( |
| &priv->wmm.tid_tbl_ptr[tid_down].ra_list, |
| struct mwifiex_ra_list_tbl, list); |
| else |
| ra_list = NULL; |
| } else { |
| memcpy(ra, skb->data, ETH_ALEN); |
| if (ra[0] & 0x01 || mwifiex_is_skb_mgmt_frame(skb)) |
| memset(ra, 0xff, ETH_ALEN); |
| ra_list = mwifiex_wmm_get_queue_raptr(priv, tid_down, ra); |
| } |
| |
| if (!ra_list) { |
| spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags); |
| mwifiex_write_data_complete(adapter, skb, 0, -1); |
| return; |
| } |
| |
| skb_queue_tail(&ra_list->skb_head, skb); |
| |
| ra_list->total_pkts_size += skb->len; |
| ra_list->pkt_count++; |
| |
| atomic_inc(&priv->wmm.tx_pkts_queued); |
| |
| if (atomic_read(&priv->wmm.highest_queued_prio) < |
| tos_to_tid_inv[tid_down]) |
| atomic_set(&priv->wmm.highest_queued_prio, |
| tos_to_tid_inv[tid_down]); |
| |
| spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags); |
| } |
| |
| /* |
| * This function processes the get WMM status command response from firmware. |
| * |
| * The response may contain multiple TLVs - |
| * - AC Queue status TLVs |
| * - Current WMM Parameter IE TLV |
| * - Admission Control action frame TLVs |
| * |
| * This function parses the TLVs and then calls further specific functions |
| * to process any changes in the queue prioritize or state. |
| */ |
| int mwifiex_ret_wmm_get_status(struct mwifiex_private *priv, |
| const struct host_cmd_ds_command *resp) |
| { |
| u8 *curr = (u8 *) &resp->params.get_wmm_status; |
| uint16_t resp_len = le16_to_cpu(resp->size), tlv_len; |
| int valid = true; |
| |
| struct mwifiex_ie_types_data *tlv_hdr; |
| struct mwifiex_ie_types_wmm_queue_status *tlv_wmm_qstatus; |
| struct ieee_types_wmm_parameter *wmm_param_ie = NULL; |
| struct mwifiex_wmm_ac_status *ac_status; |
| |
| dev_dbg(priv->adapter->dev, "info: WMM: WMM_GET_STATUS cmdresp received: %d\n", |
| resp_len); |
| |
| while ((resp_len >= sizeof(tlv_hdr->header)) && valid) { |
| tlv_hdr = (struct mwifiex_ie_types_data *) curr; |
| tlv_len = le16_to_cpu(tlv_hdr->header.len); |
| |
| switch (le16_to_cpu(tlv_hdr->header.type)) { |
| case TLV_TYPE_WMMQSTATUS: |
| tlv_wmm_qstatus = |
| (struct mwifiex_ie_types_wmm_queue_status *) |
| tlv_hdr; |
| dev_dbg(priv->adapter->dev, |
| "info: CMD_RESP: WMM_GET_STATUS:" |
| " QSTATUS TLV: %d, %d, %d\n", |
| tlv_wmm_qstatus->queue_index, |
| tlv_wmm_qstatus->flow_required, |
| tlv_wmm_qstatus->disabled); |
| |
| ac_status = &priv->wmm.ac_status[tlv_wmm_qstatus-> |
| queue_index]; |
| ac_status->disabled = tlv_wmm_qstatus->disabled; |
| ac_status->flow_required = |
| tlv_wmm_qstatus->flow_required; |
| ac_status->flow_created = tlv_wmm_qstatus->flow_created; |
| break; |
| |
| case WLAN_EID_VENDOR_SPECIFIC: |
| /* |
| * Point the regular IEEE IE 2 bytes into the Marvell IE |
| * and setup the IEEE IE type and length byte fields |
| */ |
| |
| wmm_param_ie = |
| (struct ieee_types_wmm_parameter *) (curr + |
| 2); |
| wmm_param_ie->vend_hdr.len = (u8) tlv_len; |
| wmm_param_ie->vend_hdr.element_id = |
| WLAN_EID_VENDOR_SPECIFIC; |
| |
| dev_dbg(priv->adapter->dev, |
| "info: CMD_RESP: WMM_GET_STATUS:" |
| " WMM Parameter Set Count: %d\n", |
| wmm_param_ie->qos_info_bitmap & |
| IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK); |
| |
| memcpy((u8 *) &priv->curr_bss_params.bss_descriptor. |
| wmm_ie, wmm_param_ie, |
| wmm_param_ie->vend_hdr.len + 2); |
| |
| break; |
| |
| default: |
| valid = false; |
| break; |
| } |
| |
| curr += (tlv_len + sizeof(tlv_hdr->header)); |
| resp_len -= (tlv_len + sizeof(tlv_hdr->header)); |
| } |
| |
| mwifiex_wmm_setup_queue_priorities(priv, wmm_param_ie); |
| mwifiex_wmm_setup_ac_downgrade(priv); |
| |
| return 0; |
| } |
| |
| /* |
| * Callback handler from the command module to allow insertion of a WMM TLV. |
| * |
| * If the BSS we are associating to supports WMM, this function adds the |
| * required WMM Information IE to the association request command buffer in |
| * the form of a Marvell extended IEEE IE. |
| */ |
| u32 |
| mwifiex_wmm_process_association_req(struct mwifiex_private *priv, |
| u8 **assoc_buf, |
| struct ieee_types_wmm_parameter *wmm_ie, |
| struct ieee80211_ht_cap *ht_cap) |
| { |
| struct mwifiex_ie_types_wmm_param_set *wmm_tlv; |
| u32 ret_len = 0; |
| |
| /* Null checks */ |
| if (!assoc_buf) |
| return 0; |
| if (!(*assoc_buf)) |
| return 0; |
| |
| if (!wmm_ie) |
| return 0; |
| |
| dev_dbg(priv->adapter->dev, |
| "info: WMM: process assoc req: bss->wmm_ie=%#x\n", |
| wmm_ie->vend_hdr.element_id); |
| |
| if ((priv->wmm_required || |
| (ht_cap && (priv->adapter->config_bands & BAND_GN || |
| priv->adapter->config_bands & BAND_AN))) && |
| wmm_ie->vend_hdr.element_id == WLAN_EID_VENDOR_SPECIFIC) { |
| wmm_tlv = (struct mwifiex_ie_types_wmm_param_set *) *assoc_buf; |
| wmm_tlv->header.type = cpu_to_le16((u16) wmm_info_ie[0]); |
| wmm_tlv->header.len = cpu_to_le16((u16) wmm_info_ie[1]); |
| memcpy(wmm_tlv->wmm_ie, &wmm_info_ie[2], |
| le16_to_cpu(wmm_tlv->header.len)); |
| if (wmm_ie->qos_info_bitmap & IEEE80211_WMM_IE_AP_QOSINFO_UAPSD) |
| memcpy((u8 *) (wmm_tlv->wmm_ie |
| + le16_to_cpu(wmm_tlv->header.len) |
| - sizeof(priv->wmm_qosinfo)), |
| &priv->wmm_qosinfo, sizeof(priv->wmm_qosinfo)); |
| |
| ret_len = sizeof(wmm_tlv->header) |
| + le16_to_cpu(wmm_tlv->header.len); |
| |
| *assoc_buf += ret_len; |
| } |
| |
| return ret_len; |
| } |
| |
| /* |
| * This function computes the time delay in the driver queues for a |
| * given packet. |
| * |
| * When the packet is received at the OS/Driver interface, the current |
| * time is set in the packet structure. The difference between the present |
| * time and that received time is computed in this function and limited |
| * based on pre-compiled limits in the driver. |
| */ |
| u8 |
| mwifiex_wmm_compute_drv_pkt_delay(struct mwifiex_private *priv, |
| const struct sk_buff *skb) |
| { |
| u8 ret_val; |
| struct timeval out_tstamp, in_tstamp; |
| u32 queue_delay; |
| |
| do_gettimeofday(&out_tstamp); |
| in_tstamp = ktime_to_timeval(skb->tstamp); |
| |
| queue_delay = (out_tstamp.tv_sec - in_tstamp.tv_sec) * 1000; |
| queue_delay += (out_tstamp.tv_usec - in_tstamp.tv_usec) / 1000; |
| |
| /* |
| * Queue delay is passed as a uint8 in units of 2ms (ms shifted |
| * by 1). Min value (other than 0) is therefore 2ms, max is 510ms. |
| * |
| * Pass max value if queue_delay is beyond the uint8 range |
| */ |
| ret_val = (u8) (min(queue_delay, priv->wmm.drv_pkt_delay_max) >> 1); |
| |
| dev_dbg(priv->adapter->dev, "data: WMM: Pkt Delay: %d ms," |
| " %d ms sent to FW\n", queue_delay, ret_val); |
| |
| return ret_val; |
| } |
| |
| /* |
| * This function retrieves the highest priority RA list table pointer. |
| */ |
| static struct mwifiex_ra_list_tbl * |
| mwifiex_wmm_get_highest_priolist_ptr(struct mwifiex_adapter *adapter, |
| struct mwifiex_private **priv, int *tid) |
| { |
| struct mwifiex_private *priv_tmp; |
| struct mwifiex_ra_list_tbl *ptr, *head; |
| struct mwifiex_bss_prio_node *bssprio_node, *bssprio_head; |
| struct mwifiex_tid_tbl *tid_ptr; |
| atomic_t *hqp; |
| int is_list_empty; |
| unsigned long flags; |
| int i, j; |
| |
| for (j = adapter->priv_num - 1; j >= 0; --j) { |
| spin_lock_irqsave(&adapter->bss_prio_tbl[j].bss_prio_lock, |
| flags); |
| is_list_empty = list_empty(&adapter->bss_prio_tbl[j] |
| .bss_prio_head); |
| spin_unlock_irqrestore(&adapter->bss_prio_tbl[j].bss_prio_lock, |
| flags); |
| if (is_list_empty) |
| continue; |
| |
| if (adapter->bss_prio_tbl[j].bss_prio_cur == |
| (struct mwifiex_bss_prio_node *) |
| &adapter->bss_prio_tbl[j].bss_prio_head) { |
| adapter->bss_prio_tbl[j].bss_prio_cur = |
| list_first_entry(&adapter->bss_prio_tbl[j] |
| .bss_prio_head, |
| struct mwifiex_bss_prio_node, |
| list); |
| } |
| |
| bssprio_node = adapter->bss_prio_tbl[j].bss_prio_cur; |
| bssprio_head = bssprio_node; |
| |
| do { |
| priv_tmp = bssprio_node->priv; |
| hqp = &priv_tmp->wmm.highest_queued_prio; |
| |
| for (i = atomic_read(hqp); i >= LOW_PRIO_TID; --i) { |
| |
| tid_ptr = &(priv_tmp)->wmm. |
| tid_tbl_ptr[tos_to_tid[i]]; |
| |
| /* For non-STA ra_list_curr may be NULL */ |
| if (!tid_ptr->ra_list_curr) |
| continue; |
| |
| spin_lock_irqsave(&tid_ptr->tid_tbl_lock, |
| flags); |
| is_list_empty = |
| list_empty(&adapter->bss_prio_tbl[j] |
| .bss_prio_head); |
| spin_unlock_irqrestore(&tid_ptr->tid_tbl_lock, |
| flags); |
| if (is_list_empty) |
| continue; |
| |
| /* |
| * Always choose the next ra we transmitted |
| * last time, this way we pick the ra's in |
| * round robin fashion. |
| */ |
| ptr = list_first_entry( |
| &tid_ptr->ra_list_curr->list, |
| struct mwifiex_ra_list_tbl, |
| list); |
| |
| head = ptr; |
| if (ptr == (struct mwifiex_ra_list_tbl *) |
| &tid_ptr->ra_list) { |
| /* Get next ra */ |
| ptr = list_first_entry(&ptr->list, |
| struct mwifiex_ra_list_tbl, list); |
| head = ptr; |
| } |
| |
| do { |
| is_list_empty = |
| skb_queue_empty(&ptr->skb_head); |
| |
| if (!is_list_empty) |
| goto found; |
| |
| /* Get next ra */ |
| ptr = list_first_entry(&ptr->list, |
| struct mwifiex_ra_list_tbl, |
| list); |
| if (ptr == |
| (struct mwifiex_ra_list_tbl *) |
| &tid_ptr->ra_list) |
| ptr = list_first_entry( |
| &ptr->list, |
| struct mwifiex_ra_list_tbl, |
| list); |
| } while (ptr != head); |
| } |
| |
| /* No packet at any TID for this priv. Mark as such |
| * to skip checking TIDs for this priv (until pkt is |
| * added). |
| */ |
| atomic_set(hqp, NO_PKT_PRIO_TID); |
| |
| /* Get next bss priority node */ |
| bssprio_node = list_first_entry(&bssprio_node->list, |
| struct mwifiex_bss_prio_node, |
| list); |
| |
| if (bssprio_node == |
| (struct mwifiex_bss_prio_node *) |
| &adapter->bss_prio_tbl[j].bss_prio_head) |
| /* Get next bss priority node */ |
| bssprio_node = list_first_entry( |
| &bssprio_node->list, |
| struct mwifiex_bss_prio_node, |
| list); |
| } while (bssprio_node != bssprio_head); |
| } |
| return NULL; |
| |
| found: |
| spin_lock_irqsave(&priv_tmp->wmm.ra_list_spinlock, flags); |
| if (atomic_read(hqp) > i) |
| atomic_set(hqp, i); |
| spin_unlock_irqrestore(&priv_tmp->wmm.ra_list_spinlock, flags); |
| |
| *priv = priv_tmp; |
| *tid = tos_to_tid[i]; |
| |
| return ptr; |
| } |
| |
| /* |
| * This function checks if 11n aggregation is possible. |
| */ |
| static int |
| mwifiex_is_11n_aggragation_possible(struct mwifiex_private *priv, |
| struct mwifiex_ra_list_tbl *ptr, |
| int max_buf_size) |
| { |
| int count = 0, total_size = 0; |
| struct sk_buff *skb, *tmp; |
| int max_amsdu_size; |
| |
| if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP && priv->ap_11n_enabled && |
| ptr->is_11n_enabled) |
| max_amsdu_size = min_t(int, ptr->max_amsdu, max_buf_size); |
| else |
| max_amsdu_size = max_buf_size; |
| |
| skb_queue_walk_safe(&ptr->skb_head, skb, tmp) { |
| total_size += skb->len; |
| if (total_size >= max_amsdu_size) |
| break; |
| if (++count >= MIN_NUM_AMSDU) |
| return true; |
| } |
| |
| return false; |
| } |
| |
| /* |
| * This function sends a single packet to firmware for transmission. |
| */ |
| static void |
| mwifiex_send_single_packet(struct mwifiex_private *priv, |
| struct mwifiex_ra_list_tbl *ptr, int ptr_index, |
| unsigned long ra_list_flags) |
| __releases(&priv->wmm.ra_list_spinlock) |
| { |
| struct sk_buff *skb, *skb_next; |
| struct mwifiex_tx_param tx_param; |
| struct mwifiex_adapter *adapter = priv->adapter; |
| struct mwifiex_txinfo *tx_info; |
| |
| if (skb_queue_empty(&ptr->skb_head)) { |
| spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, |
| ra_list_flags); |
| dev_dbg(adapter->dev, "data: nothing to send\n"); |
| return; |
| } |
| |
| skb = skb_dequeue(&ptr->skb_head); |
| |
| tx_info = MWIFIEX_SKB_TXCB(skb); |
| dev_dbg(adapter->dev, "data: dequeuing the packet %p %p\n", ptr, skb); |
| |
| ptr->total_pkts_size -= skb->len; |
| |
| if (!skb_queue_empty(&ptr->skb_head)) |
| skb_next = skb_peek(&ptr->skb_head); |
| else |
| skb_next = NULL; |
| |
| spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags); |
| |
| tx_param.next_pkt_len = ((skb_next) ? skb_next->len + |
| sizeof(struct txpd) : 0); |
| |
| if (mwifiex_process_tx(priv, skb, &tx_param) == -EBUSY) { |
| /* Queue the packet back at the head */ |
| spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags); |
| |
| if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) { |
| spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, |
| ra_list_flags); |
| mwifiex_write_data_complete(adapter, skb, 0, -1); |
| return; |
| } |
| |
| skb_queue_tail(&ptr->skb_head, skb); |
| |
| ptr->total_pkts_size += skb->len; |
| ptr->pkt_count++; |
| tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT; |
| spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, |
| ra_list_flags); |
| } else { |
| spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags); |
| if (mwifiex_is_ralist_valid(priv, ptr, ptr_index)) { |
| priv->wmm.packets_out[ptr_index]++; |
| priv->wmm.tid_tbl_ptr[ptr_index].ra_list_curr = ptr; |
| } |
| adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur = |
| list_first_entry( |
| &adapter->bss_prio_tbl[priv->bss_priority] |
| .bss_prio_cur->list, |
| struct mwifiex_bss_prio_node, |
| list); |
| atomic_dec(&priv->wmm.tx_pkts_queued); |
| spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, |
| ra_list_flags); |
| } |
| } |
| |
| /* |
| * This function checks if the first packet in the given RA list |
| * is already processed or not. |
| */ |
| static int |
| mwifiex_is_ptr_processed(struct mwifiex_private *priv, |
| struct mwifiex_ra_list_tbl *ptr) |
| { |
| struct sk_buff *skb; |
| struct mwifiex_txinfo *tx_info; |
| |
| if (skb_queue_empty(&ptr->skb_head)) |
| return false; |
| |
| skb = skb_peek(&ptr->skb_head); |
| |
| tx_info = MWIFIEX_SKB_TXCB(skb); |
| if (tx_info->flags & MWIFIEX_BUF_FLAG_REQUEUED_PKT) |
| return true; |
| |
| return false; |
| } |
| |
| /* |
| * This function sends a single processed packet to firmware for |
| * transmission. |
| */ |
| static void |
| mwifiex_send_processed_packet(struct mwifiex_private *priv, |
| struct mwifiex_ra_list_tbl *ptr, int ptr_index, |
| unsigned long ra_list_flags) |
| __releases(&priv->wmm.ra_list_spinlock) |
| { |
| struct mwifiex_tx_param tx_param; |
| struct mwifiex_adapter *adapter = priv->adapter; |
| int ret = -1; |
| struct sk_buff *skb, *skb_next; |
| struct mwifiex_txinfo *tx_info; |
| |
| if (skb_queue_empty(&ptr->skb_head)) { |
| spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, |
| ra_list_flags); |
| return; |
| } |
| |
| skb = skb_dequeue(&ptr->skb_head); |
| |
| if (!skb_queue_empty(&ptr->skb_head)) |
| skb_next = skb_peek(&ptr->skb_head); |
| else |
| skb_next = NULL; |
| |
| tx_info = MWIFIEX_SKB_TXCB(skb); |
| |
| spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags); |
| |
| if (adapter->iface_type == MWIFIEX_USB) { |
| adapter->data_sent = true; |
| ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_USB_EP_DATA, |
| skb, NULL); |
| } else { |
| tx_param.next_pkt_len = |
| ((skb_next) ? skb_next->len + |
| sizeof(struct txpd) : 0); |
| ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA, |
| skb, &tx_param); |
| } |
| |
| switch (ret) { |
| case -EBUSY: |
| dev_dbg(adapter->dev, "data: -EBUSY is returned\n"); |
| spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags); |
| |
| if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) { |
| spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, |
| ra_list_flags); |
| mwifiex_write_data_complete(adapter, skb, 0, -1); |
| return; |
| } |
| |
| skb_queue_tail(&ptr->skb_head, skb); |
| |
| tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT; |
| spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, |
| ra_list_flags); |
| break; |
| case -1: |
| if (adapter->iface_type != MWIFIEX_PCIE) |
| adapter->data_sent = false; |
| dev_err(adapter->dev, "host_to_card failed: %#x\n", ret); |
| adapter->dbg.num_tx_host_to_card_failure++; |
| mwifiex_write_data_complete(adapter, skb, 0, ret); |
| break; |
| case -EINPROGRESS: |
| if (adapter->iface_type != MWIFIEX_PCIE) |
| adapter->data_sent = false; |
| default: |
| break; |
| } |
| if (ret != -EBUSY) { |
| spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags); |
| if (mwifiex_is_ralist_valid(priv, ptr, ptr_index)) { |
| priv->wmm.packets_out[ptr_index]++; |
| priv->wmm.tid_tbl_ptr[ptr_index].ra_list_curr = ptr; |
| } |
| adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur = |
| list_first_entry( |
| &adapter->bss_prio_tbl[priv->bss_priority] |
| .bss_prio_cur->list, |
| struct mwifiex_bss_prio_node, |
| list); |
| atomic_dec(&priv->wmm.tx_pkts_queued); |
| spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, |
| ra_list_flags); |
| } |
| } |
| |
| /* |
| * This function dequeues a packet from the highest priority list |
| * and transmits it. |
| */ |
| static int |
| mwifiex_dequeue_tx_packet(struct mwifiex_adapter *adapter) |
| { |
| struct mwifiex_ra_list_tbl *ptr; |
| struct mwifiex_private *priv = NULL; |
| int ptr_index = 0; |
| u8 ra[ETH_ALEN]; |
| int tid_del = 0, tid = 0; |
| unsigned long flags; |
| |
| ptr = mwifiex_wmm_get_highest_priolist_ptr(adapter, &priv, &ptr_index); |
| if (!ptr) |
| return -1; |
| |
| tid = mwifiex_get_tid(ptr); |
| |
| dev_dbg(adapter->dev, "data: tid=%d\n", tid); |
| |
| spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags); |
| if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) { |
| spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags); |
| return -1; |
| } |
| |
| if (mwifiex_is_ptr_processed(priv, ptr)) { |
| mwifiex_send_processed_packet(priv, ptr, ptr_index, flags); |
| /* ra_list_spinlock has been freed in |
| mwifiex_send_processed_packet() */ |
| return 0; |
| } |
| |
| if (!ptr->is_11n_enabled || |
| mwifiex_is_ba_stream_setup(priv, ptr, tid) || |
| priv->wps.session_enable || |
| ((priv->sec_info.wpa_enabled || |
| priv->sec_info.wpa2_enabled) && |
| !priv->wpa_is_gtk_set)) { |
| mwifiex_send_single_packet(priv, ptr, ptr_index, flags); |
| /* ra_list_spinlock has been freed in |
| mwifiex_send_single_packet() */ |
| } else { |
| if (mwifiex_is_ampdu_allowed(priv, tid) && |
| ptr->pkt_count > ptr->ba_packet_thr) { |
| if (mwifiex_space_avail_for_new_ba_stream(adapter)) { |
| mwifiex_create_ba_tbl(priv, ptr->ra, tid, |
| BA_SETUP_INPROGRESS); |
| mwifiex_send_addba(priv, tid, ptr->ra); |
| } else if (mwifiex_find_stream_to_delete |
| (priv, tid, &tid_del, ra)) { |
| mwifiex_create_ba_tbl(priv, ptr->ra, tid, |
| BA_SETUP_INPROGRESS); |
| mwifiex_send_delba(priv, tid_del, ra, 1); |
| } |
| } |
| if (mwifiex_is_amsdu_allowed(priv, tid) && |
| mwifiex_is_11n_aggragation_possible(priv, ptr, |
| adapter->tx_buf_size)) |
| mwifiex_11n_aggregate_pkt(priv, ptr, INTF_HEADER_LEN, |
| ptr_index, flags); |
| /* ra_list_spinlock has been freed in |
| mwifiex_11n_aggregate_pkt() */ |
| else |
| mwifiex_send_single_packet(priv, ptr, ptr_index, flags); |
| /* ra_list_spinlock has been freed in |
| mwifiex_send_single_packet() */ |
| } |
| return 0; |
| } |
| |
| /* |
| * This function transmits the highest priority packet awaiting in the |
| * WMM Queues. |
| */ |
| void |
| mwifiex_wmm_process_tx(struct mwifiex_adapter *adapter) |
| { |
| do { |
| /* Check if busy */ |
| if (adapter->data_sent || adapter->tx_lock_flag) |
| break; |
| |
| if (mwifiex_dequeue_tx_packet(adapter)) |
| break; |
| } while (!mwifiex_wmm_lists_empty(adapter)); |
| } |