diff options
Diffstat (limited to 'kernel/drivers/net/wireless/mwifiex/wmm.c')
| -rw-r--r-- | kernel/drivers/net/wireless/mwifiex/wmm.c | 1347 |
1 files changed, 1347 insertions, 0 deletions
diff --git a/kernel/drivers/net/wireless/mwifiex/wmm.c b/kernel/drivers/net/wireless/mwifiex/wmm.c new file mode 100644 index 000000000..b2e99569a --- /dev/null +++ b/kernel/drivers/net/wireless/mwifiex/wmm.c @@ -0,0 +1,1347 @@ +/* + * Marvell Wireless LAN device driver: WMM + * + * Copyright (C) 2011-2014, 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 + +static bool disable_tx_amsdu; +module_param(disable_tx_amsdu, bool, 0644); + +/* 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 */ +}; + +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, const 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_pkt_count = 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, const 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; + + + 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; + ra_list->tdls_link = false; + ra_list->ba_status = BA_SETUP_NONE; + ra_list->amsdu_in_ampdu = false; + if (!mwifiex_queuing_ra_based(priv)) { + if (mwifiex_get_tdls_link_status(priv, ra) == + TDLS_SETUP_COMPLETE) { + ra_list->tdls_link = true; + ra_list->is_11n_enabled = + mwifiex_tdls_peer_11n_enabled(priv, ra); + } else { + ra_list->is_11n_enabled = IS_11N_ENABLED(priv); + } + } else { + spin_lock_irqsave(&priv->sta_list_spinlock, flags); + node = mwifiex_get_sta_entry(priv, ra); + 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; + spin_unlock_irqrestore(&priv->sta_list_spinlock, flags); + } + + 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->ba_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); + } +} + +/* + * 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_private *priv) +{ + struct mwifiex_wmm_desc *wmm = &priv->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) + priv->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); +} + +/* + * 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. + */ +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) { + if (!disable_tx_amsdu && + adapter->tx_buf_size > MWIFIEX_TX_DATA_BUF_SIZE_2K) + priv->aggr_prio_tbl[i].amsdu = + priv->tos_to_tid_inv[i]; + else + priv->aggr_prio_tbl[i].amsdu = + BA_STREAM_NOT_ALLOWED; + priv->aggr_prio_tbl[i].ampdu_ap = + priv->tos_to_tid_inv[i]; + priv->aggr_prio_tbl[i].ampdu_user = + priv->tos_to_tid_inv[i]; + } + + 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); + } +} + +static int mwifiex_free_ack_frame(int id, void *p, void *data) +{ + pr_warn("Have pending ack frames!\n"); + kfree_skb(p); + return 0; +} + +/* + * 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; + struct sk_buff *skb, *tmp; + + 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->surprise_removed) + priv->adapter->if_ops.clean_pcie_ring(priv->adapter); + spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags); + + skb_queue_walk_safe(&priv->tdls_txq, skb, tmp) + mwifiex_write_data_complete(priv->adapter, skb, 0, -1); + + idr_for_each(&priv->ack_status_frames, mwifiex_free_ack_frame, NULL); + idr_destroy(&priv->ack_status_frames); +} + +/* + * This function retrieves a particular RA list node, matching with the + * given TID and RA address. + */ +struct mwifiex_ra_list_tbl * +mwifiex_wmm_get_ralist_node(struct mwifiex_private *priv, u8 tid, + const 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. + */ +struct mwifiex_ra_list_tbl * +mwifiex_wmm_get_queue_raptr(struct mwifiex_private *priv, u8 tid, + const 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 deletes RA list nodes for given mac for all TIDs. + * Function also decrements TX pending count accordingly. + */ +void +mwifiex_wmm_del_peer_ra_list(struct mwifiex_private *priv, const u8 *ra_addr) +{ + struct mwifiex_ra_list_tbl *ra_list; + unsigned long flags; + int i; + + spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags); + + for (i = 0; i < MAX_NUM_TID; ++i) { + ra_list = mwifiex_wmm_get_ralist_node(priv, i, ra_addr); + + if (!ra_list) + continue; + mwifiex_wmm_del_pkts_in_ralist_node(priv, ra_list); + atomic_sub(ra_list->total_pkt_count, &priv->wmm.tx_pkts_queued); + list_del(&ra_list->list); + kfree(ra_list); + } + spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags); +} + +/* + * 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; + struct list_head list_head; + int tdls_status = TDLS_NOT_SETUP; + struct ethhdr *eth_hdr = (struct ethhdr *)skb->data; + struct mwifiex_txinfo *tx_info = MWIFIEX_SKB_TXCB(skb); + + memcpy(ra, eth_hdr->h_dest, ETH_ALEN); + + if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA && + ISSUPP_TDLS_ENABLED(adapter->fw_cap_info)) { + if (ntohs(eth_hdr->h_proto) == ETH_P_TDLS) + dev_dbg(adapter->dev, + "TDLS setup packet for %pM. Don't block\n", ra); + else if (memcmp(priv->cfg_bssid, ra, ETH_ALEN)) + tdls_status = mwifiex_get_tdls_link_status(priv, ra); + } + + 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)) { + switch (tdls_status) { + case TDLS_SETUP_COMPLETE: + ra_list = mwifiex_wmm_get_queue_raptr(priv, tid_down, + ra); + tx_info->flags |= MWIFIEX_BUF_FLAG_TDLS_PKT; + break; + case TDLS_SETUP_INPROGRESS: + skb_queue_tail(&priv->tdls_txq, skb); + spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, + flags); + return; + default: + list_head = priv->wmm.tid_tbl_ptr[tid_down].ra_list; + if (!list_empty(&list_head)) + ra_list = list_first_entry( + &list_head, struct mwifiex_ra_list_tbl, + list); + else + ra_list = NULL; + break; + } + } else { + memcpy(ra, skb->data, ETH_ALEN); + if (ra[0] & 0x01 || mwifiex_is_skb_mgmt_frame(skb)) + eth_broadcast_addr(ra); + 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->ba_pkt_count++; + ra_list->total_pkt_count++; + + if (atomic_read(&priv->wmm.highest_queued_prio) < + priv->tos_to_tid_inv[tid_down]) + atomic_set(&priv->wmm.highest_queued_prio, + priv->tos_to_tid_inv[tid_down]); + + atomic_inc(&priv->wmm.tx_pkts_queued); + + 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; + bool 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); + + if (resp_len < tlv_len + sizeof(tlv_hdr->header)) + break; + + 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) +{ + u32 queue_delay = ktime_to_ms(net_timedelta(skb->tstamp)); + u8 ret_val; + + /* + * 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; + struct mwifiex_tid_tbl *tid_ptr; + atomic_t *hqp; + unsigned long flags_ra; + int i, j; + + /* check the BSS with highest priority first */ + for (j = adapter->priv_num - 1; j >= 0; --j) { + /* iterate over BSS with the equal priority */ + list_for_each_entry(adapter->bss_prio_tbl[j].bss_prio_cur, + &adapter->bss_prio_tbl[j].bss_prio_head, + list) { + + priv_tmp = adapter->bss_prio_tbl[j].bss_prio_cur->priv; + + if (atomic_read(&priv_tmp->wmm.tx_pkts_queued) == 0) + continue; + + /* iterate over the WMM queues of the BSS */ + hqp = &priv_tmp->wmm.highest_queued_prio; + for (i = atomic_read(hqp); i >= LOW_PRIO_TID; --i) { + + spin_lock_irqsave(&priv_tmp->wmm. + ra_list_spinlock, flags_ra); + + tid_ptr = &(priv_tmp)->wmm. + tid_tbl_ptr[tos_to_tid[i]]; + + /* iterate over receiver addresses */ + list_for_each_entry(ptr, &tid_ptr->ra_list, + list) { + + if (!skb_queue_empty(&ptr->skb_head)) + /* holds both locks */ + goto found; + } + + spin_unlock_irqrestore(&priv_tmp->wmm. + ra_list_spinlock, + flags_ra); + } + } + + } + + return NULL; + +found: + /* holds ra_list_spinlock */ + if (atomic_read(hqp) > i) + atomic_set(hqp, i); + spin_unlock_irqrestore(&priv_tmp->wmm.ra_list_spinlock, flags_ra); + + *priv = priv_tmp; + *tid = tos_to_tid[i]; + + return ptr; +} + +/* This functions rotates ra and bss lists so packets are picked round robin. + * + * After a packet is successfully transmitted, rotate the ra list, so the ra + * next to the one transmitted, will come first in the list. This way we pick + * the ra' in a round robin fashion. Same applies to bss nodes of equal + * priority. + * + * Function also increments wmm.packets_out counter. + */ +void mwifiex_rotate_priolists(struct mwifiex_private *priv, + struct mwifiex_ra_list_tbl *ra, + int tid) +{ + struct mwifiex_adapter *adapter = priv->adapter; + struct mwifiex_bss_prio_tbl *tbl = adapter->bss_prio_tbl; + struct mwifiex_tid_tbl *tid_ptr = &priv->wmm.tid_tbl_ptr[tid]; + unsigned long flags; + + spin_lock_irqsave(&tbl[priv->bss_priority].bss_prio_lock, flags); + /* + * dirty trick: we remove 'head' temporarily and reinsert it after + * curr bss node. imagine list to stay fixed while head is moved + */ + list_move(&tbl[priv->bss_priority].bss_prio_head, + &tbl[priv->bss_priority].bss_prio_cur->list); + spin_unlock_irqrestore(&tbl[priv->bss_priority].bss_prio_lock, flags); + + spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags); + if (mwifiex_is_ralist_valid(priv, ra, tid)) { + priv->wmm.packets_out[tid]++; + /* same as above */ + list_move(&tid_ptr->ra_list, &ra->list); + } + spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags); +} + +/* + * 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_pkt_count--; + + 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_pkt_count++; + ptr->ba_pkt_count++; + tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT; + spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, + ra_list_flags); + } else { + mwifiex_rotate_priolists(priv, ptr, ptr_index); + atomic_dec(&priv->wmm.tx_pkts_queued); + } +} + +/* + * 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 (adapter->data_sent || adapter->tx_lock_flag) { + spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, + ra_list_flags); + skb_queue_tail(&adapter->tx_data_q, skb); + atomic_inc(&adapter->tx_queued); + return; + } + + 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; + break; + case 0: + mwifiex_write_data_complete(adapter, skb, 0, ret); + default: + break; + } + if (ret != -EBUSY) { + mwifiex_rotate_priolists(priv, ptr, ptr_index); + atomic_dec(&priv->wmm.tx_pkts_queued); + } +} + +/* + * 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 || + ptr->ba_status || + priv->wps.session_enable) { + if (ptr->is_11n_enabled && + ptr->ba_status && + ptr->amsdu_in_ampdu && + mwifiex_is_amsdu_allowed(priv, tid) && + mwifiex_is_11n_aggragation_possible(priv, ptr, + adapter->tx_buf_size)) + mwifiex_11n_aggregate_pkt(priv, ptr, 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() + */ + } else { + if (mwifiex_is_ampdu_allowed(priv, ptr, tid) && + ptr->ba_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, 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 { + if (mwifiex_dequeue_tx_packet(adapter)) + break; + if (adapter->iface_type != MWIFIEX_SDIO) { + if (adapter->data_sent || + adapter->tx_lock_flag) + break; + } else { + if (atomic_read(&adapter->tx_queued) >= + MWIFIEX_MAX_PKTS_TXQ) + break; + } + } while (!mwifiex_wmm_lists_empty(adapter)); +} |