2013-06-13 01:52:10 +08:00
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/*
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* Copyright (c) 2005-2011 Atheros Communications Inc.
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* Copyright (c) 2011-2013 Qualcomm Atheros, Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <linux/etherdevice.h>
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#include "htt.h"
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#include "mac.h"
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#include "hif.h"
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#include "txrx.h"
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#include "debug.h"
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void __ath10k_htt_tx_dec_pending(struct ath10k_htt *htt)
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{
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htt->num_pending_tx--;
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if (htt->num_pending_tx == htt->max_num_pending_tx - 1)
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ieee80211_wake_queues(htt->ar->hw);
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}
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static void ath10k_htt_tx_dec_pending(struct ath10k_htt *htt)
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{
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spin_lock_bh(&htt->tx_lock);
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__ath10k_htt_tx_dec_pending(htt);
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spin_unlock_bh(&htt->tx_lock);
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}
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static int ath10k_htt_tx_inc_pending(struct ath10k_htt *htt)
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{
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int ret = 0;
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spin_lock_bh(&htt->tx_lock);
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if (htt->num_pending_tx >= htt->max_num_pending_tx) {
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ret = -EBUSY;
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goto exit;
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}
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htt->num_pending_tx++;
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if (htt->num_pending_tx == htt->max_num_pending_tx)
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ieee80211_stop_queues(htt->ar->hw);
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exit:
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spin_unlock_bh(&htt->tx_lock);
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return ret;
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}
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int ath10k_htt_tx_alloc_msdu_id(struct ath10k_htt *htt)
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{
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int msdu_id;
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lockdep_assert_held(&htt->tx_lock);
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msdu_id = find_first_zero_bit(htt->used_msdu_ids,
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htt->max_num_pending_tx);
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if (msdu_id == htt->max_num_pending_tx)
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return -ENOBUFS;
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ath10k_dbg(ATH10K_DBG_HTT, "htt tx alloc msdu_id %d\n", msdu_id);
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__set_bit(msdu_id, htt->used_msdu_ids);
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return msdu_id;
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}
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void ath10k_htt_tx_free_msdu_id(struct ath10k_htt *htt, u16 msdu_id)
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{
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lockdep_assert_held(&htt->tx_lock);
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if (!test_bit(msdu_id, htt->used_msdu_ids))
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ath10k_warn("trying to free unallocated msdu_id %d\n", msdu_id);
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ath10k_dbg(ATH10K_DBG_HTT, "htt tx free msdu_id %hu\n", msdu_id);
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__clear_bit(msdu_id, htt->used_msdu_ids);
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}
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int ath10k_htt_tx_attach(struct ath10k_htt *htt)
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{
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u8 pipe;
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spin_lock_init(&htt->tx_lock);
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init_waitqueue_head(&htt->empty_tx_wq);
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/* At the beginning free queue number should hint us the maximum
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* queue length */
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2013-07-05 21:15:13 +08:00
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pipe = htt->ar->htc.endpoint[htt->eid].ul_pipe_id;
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2013-06-13 01:52:10 +08:00
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htt->max_num_pending_tx = ath10k_hif_get_free_queue_number(htt->ar,
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pipe);
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ath10k_dbg(ATH10K_DBG_HTT, "htt tx max num pending tx %d\n",
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htt->max_num_pending_tx);
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htt->pending_tx = kzalloc(sizeof(*htt->pending_tx) *
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htt->max_num_pending_tx, GFP_KERNEL);
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if (!htt->pending_tx)
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return -ENOMEM;
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htt->used_msdu_ids = kzalloc(sizeof(unsigned long) *
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BITS_TO_LONGS(htt->max_num_pending_tx),
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GFP_KERNEL);
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if (!htt->used_msdu_ids) {
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kfree(htt->pending_tx);
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return -ENOMEM;
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}
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return 0;
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}
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static void ath10k_htt_tx_cleanup_pending(struct ath10k_htt *htt)
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{
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struct sk_buff *txdesc;
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int msdu_id;
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/* No locks needed. Called after communication with the device has
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* been stopped. */
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for (msdu_id = 0; msdu_id < htt->max_num_pending_tx; msdu_id++) {
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if (!test_bit(msdu_id, htt->used_msdu_ids))
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continue;
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txdesc = htt->pending_tx[msdu_id];
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if (!txdesc)
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continue;
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ath10k_dbg(ATH10K_DBG_HTT, "force cleanup msdu_id %hu\n",
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msdu_id);
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if (ATH10K_SKB_CB(txdesc)->htt.refcount > 0)
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ATH10K_SKB_CB(txdesc)->htt.refcount = 1;
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ATH10K_SKB_CB(txdesc)->htt.discard = true;
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ath10k_txrx_tx_unref(htt, txdesc);
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}
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}
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void ath10k_htt_tx_detach(struct ath10k_htt *htt)
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{
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ath10k_htt_tx_cleanup_pending(htt);
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kfree(htt->pending_tx);
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kfree(htt->used_msdu_ids);
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return;
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}
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void ath10k_htt_htc_tx_complete(struct ath10k *ar, struct sk_buff *skb)
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{
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struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb);
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struct ath10k_htt *htt = ar->htt;
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if (skb_cb->htt.is_conf) {
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dev_kfree_skb_any(skb);
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return;
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}
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if (skb_cb->is_aborted) {
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skb_cb->htt.discard = true;
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/* if the skbuff is aborted we need to make sure we'll free up
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* the tx resources, we can't simply run tx_unref() 2 times
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* because if htt tx completion came in earlier we'd access
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* unallocated memory */
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if (skb_cb->htt.refcount > 1)
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skb_cb->htt.refcount = 1;
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}
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ath10k_txrx_tx_unref(htt, skb);
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}
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int ath10k_htt_h2t_ver_req_msg(struct ath10k_htt *htt)
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{
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struct sk_buff *skb;
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struct htt_cmd *cmd;
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int len = 0;
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int ret;
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len += sizeof(cmd->hdr);
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len += sizeof(cmd->ver_req);
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skb = ath10k_htc_alloc_skb(len);
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if (!skb)
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return -ENOMEM;
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skb_put(skb, len);
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cmd = (struct htt_cmd *)skb->data;
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cmd->hdr.msg_type = HTT_H2T_MSG_TYPE_VERSION_REQ;
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ATH10K_SKB_CB(skb)->htt.is_conf = true;
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2013-07-05 21:15:13 +08:00
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ret = ath10k_htc_send(&htt->ar->htc, htt->eid, skb);
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2013-06-13 01:52:10 +08:00
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if (ret) {
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dev_kfree_skb_any(skb);
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return ret;
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}
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return 0;
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}
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int ath10k_htt_send_rx_ring_cfg_ll(struct ath10k_htt *htt)
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{
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struct sk_buff *skb;
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struct htt_cmd *cmd;
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struct htt_rx_ring_setup_ring *ring;
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const int num_rx_ring = 1;
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u16 flags;
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u32 fw_idx;
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int len;
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int ret;
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/*
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* the HW expects the buffer to be an integral number of 4-byte
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* "words"
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*/
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BUILD_BUG_ON(!IS_ALIGNED(HTT_RX_BUF_SIZE, 4));
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BUILD_BUG_ON((HTT_RX_BUF_SIZE & HTT_MAX_CACHE_LINE_SIZE_MASK) != 0);
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len = sizeof(cmd->hdr) + sizeof(cmd->rx_setup.hdr)
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+ (sizeof(*ring) * num_rx_ring);
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skb = ath10k_htc_alloc_skb(len);
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if (!skb)
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return -ENOMEM;
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skb_put(skb, len);
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cmd = (struct htt_cmd *)skb->data;
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ring = &cmd->rx_setup.rings[0];
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cmd->hdr.msg_type = HTT_H2T_MSG_TYPE_RX_RING_CFG;
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cmd->rx_setup.hdr.num_rings = 1;
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/* FIXME: do we need all of this? */
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flags = 0;
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flags |= HTT_RX_RING_FLAGS_MAC80211_HDR;
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flags |= HTT_RX_RING_FLAGS_MSDU_PAYLOAD;
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flags |= HTT_RX_RING_FLAGS_PPDU_START;
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flags |= HTT_RX_RING_FLAGS_PPDU_END;
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flags |= HTT_RX_RING_FLAGS_MPDU_START;
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flags |= HTT_RX_RING_FLAGS_MPDU_END;
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flags |= HTT_RX_RING_FLAGS_MSDU_START;
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flags |= HTT_RX_RING_FLAGS_MSDU_END;
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flags |= HTT_RX_RING_FLAGS_RX_ATTENTION;
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flags |= HTT_RX_RING_FLAGS_FRAG_INFO;
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flags |= HTT_RX_RING_FLAGS_UNICAST_RX;
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flags |= HTT_RX_RING_FLAGS_MULTICAST_RX;
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flags |= HTT_RX_RING_FLAGS_CTRL_RX;
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flags |= HTT_RX_RING_FLAGS_MGMT_RX;
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flags |= HTT_RX_RING_FLAGS_NULL_RX;
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flags |= HTT_RX_RING_FLAGS_PHY_DATA_RX;
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fw_idx = __le32_to_cpu(*htt->rx_ring.alloc_idx.vaddr);
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ring->fw_idx_shadow_reg_paddr =
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__cpu_to_le32(htt->rx_ring.alloc_idx.paddr);
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ring->rx_ring_base_paddr = __cpu_to_le32(htt->rx_ring.base_paddr);
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ring->rx_ring_len = __cpu_to_le16(htt->rx_ring.size);
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ring->rx_ring_bufsize = __cpu_to_le16(HTT_RX_BUF_SIZE);
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ring->flags = __cpu_to_le16(flags);
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ring->fw_idx_init_val = __cpu_to_le16(fw_idx);
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#define desc_offset(x) (offsetof(struct htt_rx_desc, x) / 4)
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ring->mac80211_hdr_offset = __cpu_to_le16(desc_offset(rx_hdr_status));
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ring->msdu_payload_offset = __cpu_to_le16(desc_offset(msdu_payload));
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ring->ppdu_start_offset = __cpu_to_le16(desc_offset(ppdu_start));
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ring->ppdu_end_offset = __cpu_to_le16(desc_offset(ppdu_end));
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ring->mpdu_start_offset = __cpu_to_le16(desc_offset(mpdu_start));
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ring->mpdu_end_offset = __cpu_to_le16(desc_offset(mpdu_end));
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ring->msdu_start_offset = __cpu_to_le16(desc_offset(msdu_start));
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ring->msdu_end_offset = __cpu_to_le16(desc_offset(msdu_end));
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ring->rx_attention_offset = __cpu_to_le16(desc_offset(attention));
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ring->frag_info_offset = __cpu_to_le16(desc_offset(frag_info));
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#undef desc_offset
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ATH10K_SKB_CB(skb)->htt.is_conf = true;
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2013-07-05 21:15:13 +08:00
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ret = ath10k_htc_send(&htt->ar->htc, htt->eid, skb);
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2013-06-13 01:52:10 +08:00
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if (ret) {
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dev_kfree_skb_any(skb);
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return ret;
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}
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return 0;
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}
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int ath10k_htt_mgmt_tx(struct ath10k_htt *htt, struct sk_buff *msdu)
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{
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struct device *dev = htt->ar->dev;
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struct ath10k_skb_cb *skb_cb;
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struct sk_buff *txdesc = NULL;
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struct htt_cmd *cmd;
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u8 vdev_id = ATH10K_SKB_CB(msdu)->htt.vdev_id;
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int len = 0;
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int msdu_id = -1;
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int res;
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res = ath10k_htt_tx_inc_pending(htt);
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if (res)
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return res;
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len += sizeof(cmd->hdr);
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len += sizeof(cmd->mgmt_tx);
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txdesc = ath10k_htc_alloc_skb(len);
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if (!txdesc) {
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res = -ENOMEM;
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goto err;
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}
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spin_lock_bh(&htt->tx_lock);
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msdu_id = ath10k_htt_tx_alloc_msdu_id(htt);
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if (msdu_id < 0) {
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spin_unlock_bh(&htt->tx_lock);
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res = msdu_id;
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goto err;
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}
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htt->pending_tx[msdu_id] = txdesc;
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spin_unlock_bh(&htt->tx_lock);
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res = ath10k_skb_map(dev, msdu);
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if (res)
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goto err;
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skb_put(txdesc, len);
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cmd = (struct htt_cmd *)txdesc->data;
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cmd->hdr.msg_type = HTT_H2T_MSG_TYPE_MGMT_TX;
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cmd->mgmt_tx.msdu_paddr = __cpu_to_le32(ATH10K_SKB_CB(msdu)->paddr);
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cmd->mgmt_tx.len = __cpu_to_le32(msdu->len);
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cmd->mgmt_tx.desc_id = __cpu_to_le32(msdu_id);
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cmd->mgmt_tx.vdev_id = __cpu_to_le32(vdev_id);
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memcpy(cmd->mgmt_tx.hdr, msdu->data,
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min_t(int, msdu->len, HTT_MGMT_FRM_HDR_DOWNLOAD_LEN));
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/* refcount is decremented by HTC and HTT completions until it reaches
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|
|
|
* zero and is freed */
|
|
|
|
skb_cb = ATH10K_SKB_CB(txdesc);
|
|
|
|
skb_cb->htt.msdu_id = msdu_id;
|
|
|
|
skb_cb->htt.refcount = 2;
|
|
|
|
skb_cb->htt.msdu = msdu;
|
|
|
|
|
2013-07-05 21:15:13 +08:00
|
|
|
res = ath10k_htc_send(&htt->ar->htc, htt->eid, txdesc);
|
2013-06-13 01:52:10 +08:00
|
|
|
if (res)
|
|
|
|
goto err;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
err:
|
|
|
|
ath10k_skb_unmap(dev, msdu);
|
|
|
|
|
|
|
|
if (txdesc)
|
|
|
|
dev_kfree_skb_any(txdesc);
|
|
|
|
if (msdu_id >= 0) {
|
|
|
|
spin_lock_bh(&htt->tx_lock);
|
|
|
|
htt->pending_tx[msdu_id] = NULL;
|
|
|
|
ath10k_htt_tx_free_msdu_id(htt, msdu_id);
|
|
|
|
spin_unlock_bh(&htt->tx_lock);
|
|
|
|
}
|
|
|
|
ath10k_htt_tx_dec_pending(htt);
|
|
|
|
return res;
|
|
|
|
}
|
|
|
|
|
|
|
|
int ath10k_htt_tx(struct ath10k_htt *htt, struct sk_buff *msdu)
|
|
|
|
{
|
|
|
|
struct device *dev = htt->ar->dev;
|
|
|
|
struct htt_cmd *cmd;
|
|
|
|
struct htt_data_tx_desc_frag *tx_frags;
|
|
|
|
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)msdu->data;
|
|
|
|
struct ath10k_skb_cb *skb_cb;
|
|
|
|
struct sk_buff *txdesc = NULL;
|
|
|
|
struct sk_buff *txfrag = NULL;
|
|
|
|
u8 vdev_id = ATH10K_SKB_CB(msdu)->htt.vdev_id;
|
|
|
|
u8 tid;
|
|
|
|
int prefetch_len, desc_len, frag_len;
|
|
|
|
dma_addr_t frags_paddr;
|
|
|
|
int msdu_id = -1;
|
|
|
|
int res;
|
|
|
|
u8 flags0;
|
|
|
|
u16 flags1;
|
|
|
|
|
|
|
|
res = ath10k_htt_tx_inc_pending(htt);
|
|
|
|
if (res)
|
|
|
|
return res;
|
|
|
|
|
|
|
|
prefetch_len = min(htt->prefetch_len, msdu->len);
|
|
|
|
prefetch_len = roundup(prefetch_len, 4);
|
|
|
|
|
|
|
|
desc_len = sizeof(cmd->hdr) + sizeof(cmd->data_tx) + prefetch_len;
|
|
|
|
frag_len = sizeof(*tx_frags) * 2;
|
|
|
|
|
|
|
|
txdesc = ath10k_htc_alloc_skb(desc_len);
|
|
|
|
if (!txdesc) {
|
|
|
|
res = -ENOMEM;
|
|
|
|
goto err;
|
|
|
|
}
|
|
|
|
|
|
|
|
txfrag = dev_alloc_skb(frag_len);
|
|
|
|
if (!txfrag) {
|
|
|
|
res = -ENOMEM;
|
|
|
|
goto err;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!IS_ALIGNED((unsigned long)txdesc->data, 4)) {
|
|
|
|
ath10k_warn("htt alignment check failed. dropping packet.\n");
|
|
|
|
res = -EIO;
|
|
|
|
goto err;
|
|
|
|
}
|
|
|
|
|
|
|
|
spin_lock_bh(&htt->tx_lock);
|
|
|
|
msdu_id = ath10k_htt_tx_alloc_msdu_id(htt);
|
|
|
|
if (msdu_id < 0) {
|
|
|
|
spin_unlock_bh(&htt->tx_lock);
|
|
|
|
res = msdu_id;
|
|
|
|
goto err;
|
|
|
|
}
|
|
|
|
htt->pending_tx[msdu_id] = txdesc;
|
|
|
|
spin_unlock_bh(&htt->tx_lock);
|
|
|
|
|
|
|
|
res = ath10k_skb_map(dev, msdu);
|
|
|
|
if (res)
|
|
|
|
goto err;
|
|
|
|
|
|
|
|
/* tx fragment list must be terminated with zero-entry */
|
|
|
|
skb_put(txfrag, frag_len);
|
|
|
|
tx_frags = (struct htt_data_tx_desc_frag *)txfrag->data;
|
|
|
|
tx_frags[0].paddr = __cpu_to_le32(ATH10K_SKB_CB(msdu)->paddr);
|
|
|
|
tx_frags[0].len = __cpu_to_le32(msdu->len);
|
|
|
|
tx_frags[1].paddr = __cpu_to_le32(0);
|
|
|
|
tx_frags[1].len = __cpu_to_le32(0);
|
|
|
|
|
|
|
|
res = ath10k_skb_map(dev, txfrag);
|
|
|
|
if (res)
|
|
|
|
goto err;
|
|
|
|
|
|
|
|
ath10k_dbg(ATH10K_DBG_HTT, "txfrag 0x%llx msdu 0x%llx\n",
|
|
|
|
(unsigned long long) ATH10K_SKB_CB(txfrag)->paddr,
|
|
|
|
(unsigned long long) ATH10K_SKB_CB(msdu)->paddr);
|
|
|
|
ath10k_dbg_dump(ATH10K_DBG_HTT_DUMP, NULL, "txfrag: ",
|
|
|
|
txfrag->data, frag_len);
|
|
|
|
ath10k_dbg_dump(ATH10K_DBG_HTT_DUMP, NULL, "msdu: ",
|
|
|
|
msdu->data, msdu->len);
|
|
|
|
|
|
|
|
skb_put(txdesc, desc_len);
|
|
|
|
cmd = (struct htt_cmd *)txdesc->data;
|
|
|
|
memset(cmd, 0, desc_len);
|
|
|
|
|
|
|
|
tid = ATH10K_SKB_CB(msdu)->htt.tid;
|
|
|
|
|
|
|
|
ath10k_dbg(ATH10K_DBG_HTT, "htt data tx using tid %hhu\n", tid);
|
|
|
|
|
|
|
|
flags0 = 0;
|
|
|
|
if (!ieee80211_has_protected(hdr->frame_control))
|
|
|
|
flags0 |= HTT_DATA_TX_DESC_FLAGS0_NO_ENCRYPT;
|
|
|
|
flags0 |= HTT_DATA_TX_DESC_FLAGS0_MAC_HDR_PRESENT;
|
|
|
|
flags0 |= SM(ATH10K_HW_TXRX_NATIVE_WIFI,
|
|
|
|
HTT_DATA_TX_DESC_FLAGS0_PKT_TYPE);
|
|
|
|
|
|
|
|
flags1 = 0;
|
|
|
|
flags1 |= SM((u16)vdev_id, HTT_DATA_TX_DESC_FLAGS1_VDEV_ID);
|
|
|
|
flags1 |= SM((u16)tid, HTT_DATA_TX_DESC_FLAGS1_EXT_TID);
|
|
|
|
|
|
|
|
frags_paddr = ATH10K_SKB_CB(txfrag)->paddr;
|
|
|
|
|
|
|
|
cmd->hdr.msg_type = HTT_H2T_MSG_TYPE_TX_FRM;
|
|
|
|
cmd->data_tx.flags0 = flags0;
|
|
|
|
cmd->data_tx.flags1 = __cpu_to_le16(flags1);
|
|
|
|
cmd->data_tx.len = __cpu_to_le16(msdu->len);
|
|
|
|
cmd->data_tx.id = __cpu_to_le16(msdu_id);
|
|
|
|
cmd->data_tx.frags_paddr = __cpu_to_le32(frags_paddr);
|
|
|
|
cmd->data_tx.peerid = __cpu_to_le32(HTT_INVALID_PEERID);
|
|
|
|
|
|
|
|
memcpy(cmd->data_tx.prefetch, msdu->data, prefetch_len);
|
|
|
|
|
|
|
|
/* refcount is decremented by HTC and HTT completions until it reaches
|
|
|
|
* zero and is freed */
|
|
|
|
skb_cb = ATH10K_SKB_CB(txdesc);
|
|
|
|
skb_cb->htt.msdu_id = msdu_id;
|
|
|
|
skb_cb->htt.refcount = 2;
|
|
|
|
skb_cb->htt.txfrag = txfrag;
|
|
|
|
skb_cb->htt.msdu = msdu;
|
|
|
|
|
2013-07-05 21:15:13 +08:00
|
|
|
res = ath10k_htc_send(&htt->ar->htc, htt->eid, txdesc);
|
2013-06-13 01:52:10 +08:00
|
|
|
if (res)
|
|
|
|
goto err;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
err:
|
|
|
|
if (txfrag)
|
|
|
|
ath10k_skb_unmap(dev, txfrag);
|
|
|
|
if (txdesc)
|
|
|
|
dev_kfree_skb_any(txdesc);
|
|
|
|
if (txfrag)
|
|
|
|
dev_kfree_skb_any(txfrag);
|
|
|
|
if (msdu_id >= 0) {
|
|
|
|
spin_lock_bh(&htt->tx_lock);
|
|
|
|
htt->pending_tx[msdu_id] = NULL;
|
|
|
|
ath10k_htt_tx_free_msdu_id(htt, msdu_id);
|
|
|
|
spin_unlock_bh(&htt->tx_lock);
|
|
|
|
}
|
|
|
|
ath10k_htt_tx_dec_pending(htt);
|
|
|
|
ath10k_skb_unmap(dev, msdu);
|
|
|
|
return res;
|
|
|
|
}
|