/*
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* Copyright (c) 2007-2011 Atheros Communications 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 "core.h"
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#include "debug.h"
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#include "hif-ops.h"
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#define HTC_PACKET_CONTAINER_ALLOCATION 32
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#define HTC_CONTROL_BUFFER_SIZE (HTC_MAX_CTRL_MSG_LEN + HTC_HDR_LENGTH)
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static int ath6kl_htc_pipe_tx(struct htc_target *handle,
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struct htc_packet *packet);
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static void ath6kl_htc_pipe_cleanup(struct htc_target *handle);
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/* htc pipe tx path */
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static inline void restore_tx_packet(struct htc_packet *packet)
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{
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if (packet->info.tx.flags & HTC_FLAGS_TX_FIXUP_NETBUF) {
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skb_pull(packet->skb, sizeof(struct htc_frame_hdr));
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packet->info.tx.flags &= ~HTC_FLAGS_TX_FIXUP_NETBUF;
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}
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}
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static void do_send_completion(struct htc_endpoint *ep,
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struct list_head *queue_to_indicate)
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{
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struct htc_packet *packet;
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if (list_empty(queue_to_indicate)) {
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/* nothing to indicate */
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return;
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}
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if (ep->ep_cb.tx_comp_multi != NULL) {
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ath6kl_dbg(ATH6KL_DBG_HTC,
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"%s: calling ep %d, send complete multiple callback (%d pkts)\n",
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__func__, ep->eid,
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get_queue_depth(queue_to_indicate));
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/*
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* a multiple send complete handler is being used,
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* pass the queue to the handler
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*/
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ep->ep_cb.tx_comp_multi(ep->target, queue_to_indicate);
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/*
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* all packets are now owned by the callback,
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* reset queue to be safe
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*/
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INIT_LIST_HEAD(queue_to_indicate);
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} else {
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/* using legacy EpTxComplete */
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do {
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packet = list_first_entry(queue_to_indicate,
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struct htc_packet, list);
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list_del(&packet->list);
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ath6kl_dbg(ATH6KL_DBG_HTC,
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"%s: calling ep %d send complete callback on packet 0x%p\n",
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__func__, ep->eid, packet);
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ep->ep_cb.tx_complete(ep->target, packet);
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} while (!list_empty(queue_to_indicate));
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}
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}
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static void send_packet_completion(struct htc_target *target,
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struct htc_packet *packet)
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{
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struct htc_endpoint *ep = &target->endpoint[packet->endpoint];
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struct list_head container;
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restore_tx_packet(packet);
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INIT_LIST_HEAD(&container);
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list_add_tail(&packet->list, &container);
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/* do completion */
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do_send_completion(ep, &container);
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}
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static void get_htc_packet_credit_based(struct htc_target *target,
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struct htc_endpoint *ep,
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struct list_head *queue)
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{
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int credits_required;
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int remainder;
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u8 send_flags;
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struct htc_packet *packet;
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unsigned int transfer_len;
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/* NOTE : the TX lock is held when this function is called */
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/* loop until we can grab as many packets out of the queue as we can */
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while (true) {
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send_flags = 0;
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if (list_empty(&ep->txq))
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break;
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/* get packet at head, but don't remove it */
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packet = list_first_entry(&ep->txq, struct htc_packet, list);
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ath6kl_dbg(ATH6KL_DBG_HTC,
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"%s: got head packet:0x%p , queue depth: %d\n",
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__func__, packet, get_queue_depth(&ep->txq));
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transfer_len = packet->act_len + HTC_HDR_LENGTH;
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if (transfer_len <= target->tgt_cred_sz) {
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credits_required = 1;
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} else {
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/* figure out how many credits this message requires */
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credits_required = transfer_len / target->tgt_cred_sz;
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remainder = transfer_len % target->tgt_cred_sz;
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if (remainder)
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credits_required++;
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}
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ath6kl_dbg(ATH6KL_DBG_HTC, "%s: creds required:%d got:%d\n",
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__func__, credits_required, ep->cred_dist.credits);
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if (ep->eid == ENDPOINT_0) {
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/*
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* endpoint 0 is special, it always has a credit and
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* does not require credit based flow control
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*/
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credits_required = 0;
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} else {
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if (ep->cred_dist.credits < credits_required)
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break;
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ep->cred_dist.credits -= credits_required;
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ep->ep_st.cred_cosumd += credits_required;
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/* check if we need credits back from the target */
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if (ep->cred_dist.credits <
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ep->cred_dist.cred_per_msg) {
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/* tell the target we need credits ASAP! */
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send_flags |= HTC_FLAGS_NEED_CREDIT_UPDATE;
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ep->ep_st.cred_low_indicate += 1;
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ath6kl_dbg(ATH6KL_DBG_HTC,
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"%s: host needs credits\n",
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__func__);
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}
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}
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/* now we can fully dequeue */
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packet = list_first_entry(&ep->txq, struct htc_packet, list);
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list_del(&packet->list);
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/* save the number of credits this packet consumed */
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packet->info.tx.cred_used = credits_required;
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/* save send flags */
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packet->info.tx.flags = send_flags;
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packet->info.tx.seqno = ep->seqno;
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ep->seqno++;
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/* queue this packet into the caller's queue */
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list_add_tail(&packet->list, queue);
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}
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}
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static void get_htc_packet(struct htc_target *target,
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struct htc_endpoint *ep,
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struct list_head *queue, int resources)
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{
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struct htc_packet *packet;
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/* NOTE : the TX lock is held when this function is called */
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/* loop until we can grab as many packets out of the queue as we can */
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while (resources) {
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if (list_empty(&ep->txq))
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break;
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packet = list_first_entry(&ep->txq, struct htc_packet, list);
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list_del(&packet->list);
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ath6kl_dbg(ATH6KL_DBG_HTC,
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"%s: got packet:0x%p , new queue depth: %d\n",
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__func__, packet, get_queue_depth(&ep->txq));
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packet->info.tx.seqno = ep->seqno;
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packet->info.tx.flags = 0;
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packet->info.tx.cred_used = 0;
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ep->seqno++;
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/* queue this packet into the caller's queue */
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list_add_tail(&packet->list, queue);
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resources--;
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}
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}
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static int htc_issue_packets(struct htc_target *target,
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struct htc_endpoint *ep,
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struct list_head *pkt_queue)
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{
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int status = 0;
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u16 payload_len;
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struct sk_buff *skb;
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struct htc_frame_hdr *htc_hdr;
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struct htc_packet *packet;
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ath6kl_dbg(ATH6KL_DBG_HTC,
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"%s: queue: 0x%p, pkts %d\n", __func__,
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pkt_queue, get_queue_depth(pkt_queue));
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while (!list_empty(pkt_queue)) {
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packet = list_first_entry(pkt_queue, struct htc_packet, list);
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list_del(&packet->list);
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skb = packet->skb;
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if (!skb) {
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WARN_ON_ONCE(1);
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status = -EINVAL;
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break;
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}
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payload_len = packet->act_len;
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/* setup HTC frame header */
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htc_hdr = skb_push(skb, sizeof(*htc_hdr));
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if (!htc_hdr) {
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WARN_ON_ONCE(1);
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status = -EINVAL;
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break;
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}
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packet->info.tx.flags |= HTC_FLAGS_TX_FIXUP_NETBUF;
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/* Endianess? */
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put_unaligned((u16) payload_len, &htc_hdr->payld_len);
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htc_hdr->flags = packet->info.tx.flags;
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htc_hdr->eid = (u8) packet->endpoint;
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htc_hdr->ctrl[0] = 0;
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htc_hdr->ctrl[1] = (u8) packet->info.tx.seqno;
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spin_lock_bh(&target->tx_lock);
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/* store in look up queue to match completions */
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list_add_tail(&packet->list, &ep->pipe.tx_lookup_queue);
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ep->ep_st.tx_issued += 1;
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spin_unlock_bh(&target->tx_lock);
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status = ath6kl_hif_pipe_send(target->dev->ar,
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ep->pipe.pipeid_ul, NULL, skb);
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if (status != 0) {
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if (status != -ENOMEM) {
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/* TODO: if more than 1 endpoint maps to the
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* same PipeID, it is possible to run out of
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* resources in the HIF layer.
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* Don't emit the error
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*/
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ath6kl_dbg(ATH6KL_DBG_HTC,
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"%s: failed status:%d\n",
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__func__, status);
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}
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spin_lock_bh(&target->tx_lock);
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list_del(&packet->list);
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/* reclaim credits */
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ep->cred_dist.credits += packet->info.tx.cred_used;
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spin_unlock_bh(&target->tx_lock);
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/* put it back into the callers queue */
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list_add(&packet->list, pkt_queue);
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break;
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}
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}
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if (status != 0) {
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while (!list_empty(pkt_queue)) {
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if (status != -ENOMEM) {
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ath6kl_dbg(ATH6KL_DBG_HTC,
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"%s: failed pkt:0x%p status:%d\n",
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__func__, packet, status);
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}
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packet = list_first_entry(pkt_queue,
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struct htc_packet, list);
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list_del(&packet->list);
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packet->status = status;
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send_packet_completion(target, packet);
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}
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}
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return status;
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}
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static enum htc_send_queue_result htc_try_send(struct htc_target *target,
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struct htc_endpoint *ep,
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struct list_head *txq)
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{
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struct list_head send_queue; /* temp queue to hold packets */
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struct htc_packet *packet, *tmp_pkt;
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struct ath6kl *ar = target->dev->ar;
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enum htc_send_full_action action;
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int tx_resources, overflow, txqueue_depth, i, good_pkts;
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u8 pipeid;
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ath6kl_dbg(ATH6KL_DBG_HTC, "%s: (queue:0x%p depth:%d)\n",
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__func__, txq,
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(txq == NULL) ? 0 : get_queue_depth(txq));
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/* init the local send queue */
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INIT_LIST_HEAD(&send_queue);
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/*
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* txq equals to NULL means
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* caller didn't provide a queue, just wants us to
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* check queues and send
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*/
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if (txq != NULL) {
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if (list_empty(txq)) {
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/* empty queue */
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return HTC_SEND_QUEUE_DROP;
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}
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spin_lock_bh(&target->tx_lock);
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txqueue_depth = get_queue_depth(&ep->txq);
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spin_unlock_bh(&target->tx_lock);
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if (txqueue_depth >= ep->max_txq_depth) {
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/* we've already overflowed */
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overflow = get_queue_depth(txq);
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} else {
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/* get how much we will overflow by */
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overflow = txqueue_depth;
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overflow += get_queue_depth(txq);
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/* get how much we will overflow the TX queue by */
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overflow -= ep->max_txq_depth;
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}
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/* if overflow is negative or zero, we are okay */
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if (overflow > 0) {
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ath6kl_dbg(ATH6KL_DBG_HTC,
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"%s: Endpoint %d, TX queue will overflow :%d, Tx Depth:%d, Max:%d\n",
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__func__, ep->eid, overflow, txqueue_depth,
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ep->max_txq_depth);
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}
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if ((overflow <= 0) ||
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(ep->ep_cb.tx_full == NULL)) {
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/*
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* all packets will fit or caller did not provide send
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* full indication handler -- just move all of them
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* to the local send_queue object
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*/
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list_splice_tail_init(txq, &send_queue);
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} else {
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good_pkts = get_queue_depth(txq) - overflow;
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if (good_pkts < 0) {
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WARN_ON_ONCE(1);
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return HTC_SEND_QUEUE_DROP;
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}
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/* we have overflowed, and a callback is provided */
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/* dequeue all non-overflow packets to the sendqueue */
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for (i = 0; i < good_pkts; i++) {
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/* pop off caller's queue */
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packet = list_first_entry(txq,
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struct htc_packet,
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list);
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/* move to local queue */
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list_move_tail(&packet->list, &send_queue);
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}
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/*
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* the caller's queue has all the packets that won't fit
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* walk through the caller's queue and indicate each to
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* the send full handler
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*/
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list_for_each_entry_safe(packet, tmp_pkt,
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txq, list) {
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ath6kl_dbg(ATH6KL_DBG_HTC,
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"%s: Indicate overflowed TX pkts: %p\n",
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__func__, packet);
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action = ep->ep_cb.tx_full(ep->target, packet);
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if (action == HTC_SEND_FULL_DROP) {
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/* callback wants the packet dropped */
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ep->ep_st.tx_dropped += 1;
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/* leave this one in the caller's queue
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* for cleanup */
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} else {
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/* callback wants to keep this packet,
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* move from caller's queue to the send
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* queue */
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list_move_tail(&packet->list,
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&send_queue);
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}
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}
|
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if (list_empty(&send_queue)) {
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/* no packets made it in, caller will cleanup */
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return HTC_SEND_QUEUE_DROP;
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}
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}
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}
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if (!ep->pipe.tx_credit_flow_enabled) {
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tx_resources =
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ath6kl_hif_pipe_get_free_queue_number(ar,
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ep->pipe.pipeid_ul);
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} else {
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tx_resources = 0;
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}
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spin_lock_bh(&target->tx_lock);
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if (!list_empty(&send_queue)) {
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/* transfer packets to tail */
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list_splice_tail_init(&send_queue, &ep->txq);
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if (!list_empty(&send_queue)) {
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WARN_ON_ONCE(1);
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spin_unlock_bh(&target->tx_lock);
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return HTC_SEND_QUEUE_DROP;
|
}
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INIT_LIST_HEAD(&send_queue);
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}
|
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/* increment tx processing count on entry */
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ep->tx_proc_cnt++;
|
|
if (ep->tx_proc_cnt > 1) {
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/*
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* Another thread or task is draining the TX queues on this
|
* endpoint that thread will reset the tx processing count
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* when the queue is drained.
|
*/
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ep->tx_proc_cnt--;
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spin_unlock_bh(&target->tx_lock);
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return HTC_SEND_QUEUE_OK;
|
}
|
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/***** beyond this point only 1 thread may enter ******/
|
|
/*
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* Now drain the endpoint TX queue for transmission as long as we have
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* enough transmit resources.
|
*/
|
while (true) {
|
if (get_queue_depth(&ep->txq) == 0)
|
break;
|
|
if (ep->pipe.tx_credit_flow_enabled) {
|
/*
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* Credit based mechanism provides flow control
|
* based on target transmit resource availability,
|
* we assume that the HIF layer will always have
|
* bus resources greater than target transmit
|
* resources.
|
*/
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get_htc_packet_credit_based(target, ep, &send_queue);
|
} else {
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/*
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* Get all packets for this endpoint that we can
|
* for this pass.
|
*/
|
get_htc_packet(target, ep, &send_queue, tx_resources);
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}
|
|
if (get_queue_depth(&send_queue) == 0) {
|
/*
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* Didn't get packets due to out of resources or TX
|
* queue was drained.
|
*/
|
break;
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}
|
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spin_unlock_bh(&target->tx_lock);
|
|
/* send what we can */
|
htc_issue_packets(target, ep, &send_queue);
|
|
if (!ep->pipe.tx_credit_flow_enabled) {
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pipeid = ep->pipe.pipeid_ul;
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tx_resources =
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ath6kl_hif_pipe_get_free_queue_number(ar, pipeid);
|
}
|
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spin_lock_bh(&target->tx_lock);
|
}
|
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/* done with this endpoint, we can clear the count */
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ep->tx_proc_cnt = 0;
|
spin_unlock_bh(&target->tx_lock);
|
|
return HTC_SEND_QUEUE_OK;
|
}
|
|
/* htc control packet manipulation */
|
static void destroy_htc_txctrl_packet(struct htc_packet *packet)
|
{
|
struct sk_buff *skb;
|
skb = packet->skb;
|
dev_kfree_skb(skb);
|
kfree(packet);
|
}
|
|
static struct htc_packet *build_htc_txctrl_packet(void)
|
{
|
struct htc_packet *packet = NULL;
|
struct sk_buff *skb;
|
|
packet = kzalloc(sizeof(struct htc_packet), GFP_KERNEL);
|
if (packet == NULL)
|
return NULL;
|
|
skb = __dev_alloc_skb(HTC_CONTROL_BUFFER_SIZE, GFP_KERNEL);
|
|
if (skb == NULL) {
|
kfree(packet);
|
return NULL;
|
}
|
packet->skb = skb;
|
|
return packet;
|
}
|
|
static void htc_free_txctrl_packet(struct htc_target *target,
|
struct htc_packet *packet)
|
{
|
destroy_htc_txctrl_packet(packet);
|
}
|
|
static struct htc_packet *htc_alloc_txctrl_packet(struct htc_target *target)
|
{
|
return build_htc_txctrl_packet();
|
}
|
|
static void htc_txctrl_complete(struct htc_target *target,
|
struct htc_packet *packet)
|
{
|
htc_free_txctrl_packet(target, packet);
|
}
|
|
#define MAX_MESSAGE_SIZE 1536
|
|
static int htc_setup_target_buffer_assignments(struct htc_target *target)
|
{
|
int status, credits, credit_per_maxmsg, i;
|
struct htc_pipe_txcredit_alloc *entry;
|
unsigned int hif_usbaudioclass = 0;
|
|
credit_per_maxmsg = MAX_MESSAGE_SIZE / target->tgt_cred_sz;
|
if (MAX_MESSAGE_SIZE % target->tgt_cred_sz)
|
credit_per_maxmsg++;
|
|
/* TODO, this should be configured by the caller! */
|
|
credits = target->tgt_creds;
|
entry = &target->pipe.txcredit_alloc[0];
|
|
status = -ENOMEM;
|
|
/* FIXME: hif_usbaudioclass is always zero */
|
if (hif_usbaudioclass) {
|
ath6kl_dbg(ATH6KL_DBG_HTC,
|
"%s: For USB Audio Class- Total:%d\n",
|
__func__, credits);
|
entry++;
|
entry++;
|
/* Setup VO Service To have Max Credits */
|
entry->service_id = WMI_DATA_VO_SVC;
|
entry->credit_alloc = (credits - 6);
|
if (entry->credit_alloc == 0)
|
entry->credit_alloc++;
|
|
credits -= (int) entry->credit_alloc;
|
if (credits <= 0)
|
return status;
|
|
entry++;
|
entry->service_id = WMI_CONTROL_SVC;
|
entry->credit_alloc = credit_per_maxmsg;
|
credits -= (int) entry->credit_alloc;
|
if (credits <= 0)
|
return status;
|
|
/* leftovers go to best effort */
|
entry++;
|
entry++;
|
entry->service_id = WMI_DATA_BE_SVC;
|
entry->credit_alloc = (u8) credits;
|
status = 0;
|
} else {
|
entry++;
|
entry->service_id = WMI_DATA_VI_SVC;
|
entry->credit_alloc = credits / 4;
|
if (entry->credit_alloc == 0)
|
entry->credit_alloc++;
|
|
credits -= (int) entry->credit_alloc;
|
if (credits <= 0)
|
return status;
|
|
entry++;
|
entry->service_id = WMI_DATA_VO_SVC;
|
entry->credit_alloc = credits / 4;
|
if (entry->credit_alloc == 0)
|
entry->credit_alloc++;
|
|
credits -= (int) entry->credit_alloc;
|
if (credits <= 0)
|
return status;
|
|
entry++;
|
entry->service_id = WMI_CONTROL_SVC;
|
entry->credit_alloc = credit_per_maxmsg;
|
credits -= (int) entry->credit_alloc;
|
if (credits <= 0)
|
return status;
|
|
entry++;
|
entry->service_id = WMI_DATA_BK_SVC;
|
entry->credit_alloc = credit_per_maxmsg;
|
credits -= (int) entry->credit_alloc;
|
if (credits <= 0)
|
return status;
|
|
/* leftovers go to best effort */
|
entry++;
|
entry->service_id = WMI_DATA_BE_SVC;
|
entry->credit_alloc = (u8) credits;
|
status = 0;
|
}
|
|
if (status == 0) {
|
for (i = 0; i < ENDPOINT_MAX; i++) {
|
if (target->pipe.txcredit_alloc[i].service_id != 0) {
|
ath6kl_dbg(ATH6KL_DBG_HTC,
|
"HTC Service Index : %d TX : 0x%2.2X : alloc:%d\n",
|
i,
|
target->pipe.txcredit_alloc[i].
|
service_id,
|
target->pipe.txcredit_alloc[i].
|
credit_alloc);
|
}
|
}
|
}
|
return status;
|
}
|
|
/* process credit reports and call distribution function */
|
static void htc_process_credit_report(struct htc_target *target,
|
struct htc_credit_report *rpt,
|
int num_entries,
|
enum htc_endpoint_id from_ep)
|
{
|
int total_credits = 0, i;
|
struct htc_endpoint *ep;
|
|
/* lock out TX while we update credits */
|
spin_lock_bh(&target->tx_lock);
|
|
for (i = 0; i < num_entries; i++, rpt++) {
|
if (rpt->eid >= ENDPOINT_MAX) {
|
WARN_ON_ONCE(1);
|
spin_unlock_bh(&target->tx_lock);
|
return;
|
}
|
|
ep = &target->endpoint[rpt->eid];
|
ep->cred_dist.credits += rpt->credits;
|
|
if (ep->cred_dist.credits && get_queue_depth(&ep->txq)) {
|
spin_unlock_bh(&target->tx_lock);
|
htc_try_send(target, ep, NULL);
|
spin_lock_bh(&target->tx_lock);
|
}
|
|
total_credits += rpt->credits;
|
}
|
ath6kl_dbg(ATH6KL_DBG_HTC,
|
"Report indicated %d credits to distribute\n",
|
total_credits);
|
|
spin_unlock_bh(&target->tx_lock);
|
}
|
|
/* flush endpoint TX queue */
|
static void htc_flush_tx_endpoint(struct htc_target *target,
|
struct htc_endpoint *ep, u16 tag)
|
{
|
struct htc_packet *packet;
|
|
spin_lock_bh(&target->tx_lock);
|
while (get_queue_depth(&ep->txq)) {
|
packet = list_first_entry(&ep->txq, struct htc_packet, list);
|
list_del(&packet->list);
|
packet->status = 0;
|
send_packet_completion(target, packet);
|
}
|
spin_unlock_bh(&target->tx_lock);
|
}
|
|
/*
|
* In the adapted HIF layer, struct sk_buff * are passed between HIF and HTC,
|
* since upper layers expects struct htc_packet containers we use the completed
|
* skb and lookup it's corresponding HTC packet buffer from a lookup list.
|
* This is extra overhead that can be fixed by re-aligning HIF interfaces with
|
* HTC.
|
*/
|
static struct htc_packet *htc_lookup_tx_packet(struct htc_target *target,
|
struct htc_endpoint *ep,
|
struct sk_buff *skb)
|
{
|
struct htc_packet *packet, *tmp_pkt, *found_packet = NULL;
|
|
spin_lock_bh(&target->tx_lock);
|
|
/*
|
* interate from the front of tx lookup queue
|
* this lookup should be fast since lower layers completes in-order and
|
* so the completed packet should be at the head of the list generally
|
*/
|
list_for_each_entry_safe(packet, tmp_pkt, &ep->pipe.tx_lookup_queue,
|
list) {
|
/* check for removal */
|
if (skb == packet->skb) {
|
/* found it */
|
list_del(&packet->list);
|
found_packet = packet;
|
break;
|
}
|
}
|
|
spin_unlock_bh(&target->tx_lock);
|
|
return found_packet;
|
}
|
|
static int ath6kl_htc_pipe_tx_complete(struct ath6kl *ar, struct sk_buff *skb)
|
{
|
struct htc_target *target = ar->htc_target;
|
struct htc_frame_hdr *htc_hdr;
|
struct htc_endpoint *ep;
|
struct htc_packet *packet;
|
u8 ep_id, *netdata;
|
|
netdata = skb->data;
|
|
htc_hdr = (struct htc_frame_hdr *) netdata;
|
|
ep_id = htc_hdr->eid;
|
ep = &target->endpoint[ep_id];
|
|
packet = htc_lookup_tx_packet(target, ep, skb);
|
if (packet == NULL) {
|
/* may have already been flushed and freed */
|
ath6kl_err("HTC TX lookup failed!\n");
|
} else {
|
/* will be giving this buffer back to upper layers */
|
packet->status = 0;
|
send_packet_completion(target, packet);
|
}
|
skb = NULL;
|
|
if (!ep->pipe.tx_credit_flow_enabled) {
|
/*
|
* note: when using TX credit flow, the re-checking of queues
|
* happens when credits flow back from the target. in the
|
* non-TX credit case, we recheck after the packet completes
|
*/
|
htc_try_send(target, ep, NULL);
|
}
|
|
return 0;
|
}
|
|
static int htc_send_packets_multiple(struct htc_target *target,
|
struct list_head *pkt_queue)
|
{
|
struct htc_endpoint *ep;
|
struct htc_packet *packet, *tmp_pkt;
|
|
if (list_empty(pkt_queue))
|
return -EINVAL;
|
|
/* get first packet to find out which ep the packets will go into */
|
packet = list_first_entry(pkt_queue, struct htc_packet, list);
|
|
if (packet->endpoint >= ENDPOINT_MAX) {
|
WARN_ON_ONCE(1);
|
return -EINVAL;
|
}
|
ep = &target->endpoint[packet->endpoint];
|
|
htc_try_send(target, ep, pkt_queue);
|
|
/* do completion on any packets that couldn't get in */
|
if (!list_empty(pkt_queue)) {
|
list_for_each_entry_safe(packet, tmp_pkt, pkt_queue, list) {
|
packet->status = -ENOMEM;
|
}
|
|
do_send_completion(ep, pkt_queue);
|
}
|
|
return 0;
|
}
|
|
/* htc pipe rx path */
|
static struct htc_packet *alloc_htc_packet_container(struct htc_target *target)
|
{
|
struct htc_packet *packet;
|
spin_lock_bh(&target->rx_lock);
|
|
if (target->pipe.htc_packet_pool == NULL) {
|
spin_unlock_bh(&target->rx_lock);
|
return NULL;
|
}
|
|
packet = target->pipe.htc_packet_pool;
|
target->pipe.htc_packet_pool = (struct htc_packet *) packet->list.next;
|
|
spin_unlock_bh(&target->rx_lock);
|
|
packet->list.next = NULL;
|
return packet;
|
}
|
|
static void free_htc_packet_container(struct htc_target *target,
|
struct htc_packet *packet)
|
{
|
struct list_head *lh;
|
|
spin_lock_bh(&target->rx_lock);
|
|
if (target->pipe.htc_packet_pool == NULL) {
|
target->pipe.htc_packet_pool = packet;
|
packet->list.next = NULL;
|
} else {
|
lh = (struct list_head *) target->pipe.htc_packet_pool;
|
packet->list.next = lh;
|
target->pipe.htc_packet_pool = packet;
|
}
|
|
spin_unlock_bh(&target->rx_lock);
|
}
|
|
static int htc_process_trailer(struct htc_target *target, u8 *buffer,
|
int len, enum htc_endpoint_id from_ep)
|
{
|
struct htc_credit_report *report;
|
struct htc_record_hdr *record;
|
u8 *record_buf;
|
int status = 0;
|
|
while (len > 0) {
|
if (len < sizeof(struct htc_record_hdr)) {
|
status = -EINVAL;
|
break;
|
}
|
|
/* these are byte aligned structs */
|
record = (struct htc_record_hdr *) buffer;
|
len -= sizeof(struct htc_record_hdr);
|
buffer += sizeof(struct htc_record_hdr);
|
|
if (record->len > len) {
|
/* no room left in buffer for record */
|
ath6kl_dbg(ATH6KL_DBG_HTC,
|
"invalid length: %d (id:%d) buffer has: %d bytes left\n",
|
record->len, record->rec_id, len);
|
status = -EINVAL;
|
break;
|
}
|
|
/* start of record follows the header */
|
record_buf = buffer;
|
|
switch (record->rec_id) {
|
case HTC_RECORD_CREDITS:
|
if (record->len < sizeof(struct htc_credit_report)) {
|
WARN_ON_ONCE(1);
|
return -EINVAL;
|
}
|
|
report = (struct htc_credit_report *) record_buf;
|
htc_process_credit_report(target, report,
|
record->len / sizeof(*report),
|
from_ep);
|
break;
|
default:
|
ath6kl_dbg(ATH6KL_DBG_HTC,
|
"unhandled record: id:%d length:%d\n",
|
record->rec_id, record->len);
|
break;
|
}
|
|
/* advance buffer past this record for next time around */
|
buffer += record->len;
|
len -= record->len;
|
}
|
|
return status;
|
}
|
|
static void do_recv_completion(struct htc_endpoint *ep,
|
struct list_head *queue_to_indicate)
|
{
|
struct htc_packet *packet;
|
|
if (list_empty(queue_to_indicate)) {
|
/* nothing to indicate */
|
return;
|
}
|
|
/* using legacy EpRecv */
|
while (!list_empty(queue_to_indicate)) {
|
packet = list_first_entry(queue_to_indicate,
|
struct htc_packet, list);
|
list_del(&packet->list);
|
ep->ep_cb.rx(ep->target, packet);
|
}
|
|
return;
|
}
|
|
static void recv_packet_completion(struct htc_target *target,
|
struct htc_endpoint *ep,
|
struct htc_packet *packet)
|
{
|
struct list_head container;
|
INIT_LIST_HEAD(&container);
|
list_add_tail(&packet->list, &container);
|
|
/* do completion */
|
do_recv_completion(ep, &container);
|
}
|
|
static int ath6kl_htc_pipe_rx_complete(struct ath6kl *ar, struct sk_buff *skb,
|
u8 pipeid)
|
{
|
struct htc_target *target = ar->htc_target;
|
u8 *netdata, *trailer, hdr_info;
|
struct htc_frame_hdr *htc_hdr;
|
u32 netlen, trailerlen = 0;
|
struct htc_packet *packet;
|
struct htc_endpoint *ep;
|
u16 payload_len;
|
int status = 0;
|
|
/*
|
* ar->htc_target can be NULL due to a race condition that can occur
|
* during driver initialization(we do 'ath6kl_hif_power_on' before
|
* initializing 'ar->htc_target' via 'ath6kl_htc_create').
|
* 'ath6kl_hif_power_on' assigns 'ath6kl_recv_complete' as
|
* usb_complete_t/callback function for 'usb_fill_bulk_urb'.
|
* Thus the possibility of ar->htc_target being NULL
|
* via ath6kl_recv_complete -> ath6kl_usb_io_comp_work.
|
*/
|
if (!target) {
|
ath6kl_dbg(ATH6KL_DBG_HTC, "Target not yet initialized\n");
|
status = -EINVAL;
|
goto free_skb;
|
}
|
|
|
netdata = skb->data;
|
netlen = skb->len;
|
|
htc_hdr = (struct htc_frame_hdr *) netdata;
|
|
if (htc_hdr->eid >= ENDPOINT_MAX) {
|
ath6kl_dbg(ATH6KL_DBG_HTC,
|
"HTC Rx: invalid EndpointID=%d\n",
|
htc_hdr->eid);
|
status = -EINVAL;
|
goto free_skb;
|
}
|
ep = &target->endpoint[htc_hdr->eid];
|
|
payload_len = le16_to_cpu(get_unaligned(&htc_hdr->payld_len));
|
|
if (netlen < (payload_len + HTC_HDR_LENGTH)) {
|
ath6kl_dbg(ATH6KL_DBG_HTC,
|
"HTC Rx: insufficient length, got:%d expected =%zu\n",
|
netlen, payload_len + HTC_HDR_LENGTH);
|
status = -EINVAL;
|
goto free_skb;
|
}
|
|
/* get flags to check for trailer */
|
hdr_info = htc_hdr->flags;
|
if (hdr_info & HTC_FLG_RX_TRAILER) {
|
/* extract the trailer length */
|
hdr_info = htc_hdr->ctrl[0];
|
if ((hdr_info < sizeof(struct htc_record_hdr)) ||
|
(hdr_info > payload_len)) {
|
ath6kl_dbg(ATH6KL_DBG_HTC,
|
"invalid header: payloadlen should be %d, CB[0]: %d\n",
|
payload_len, hdr_info);
|
status = -EINVAL;
|
goto free_skb;
|
}
|
|
trailerlen = hdr_info;
|
/* process trailer after hdr/apps payload */
|
trailer = (u8 *) htc_hdr + HTC_HDR_LENGTH +
|
payload_len - hdr_info;
|
status = htc_process_trailer(target, trailer, hdr_info,
|
htc_hdr->eid);
|
if (status != 0)
|
goto free_skb;
|
}
|
|
if (((int) payload_len - (int) trailerlen) <= 0) {
|
/* zero length packet with trailer, just drop these */
|
goto free_skb;
|
}
|
|
if (htc_hdr->eid == ENDPOINT_0) {
|
/* handle HTC control message */
|
if (target->htc_flags & HTC_OP_STATE_SETUP_COMPLETE) {
|
/*
|
* fatal: target should not send unsolicited
|
* messageson the endpoint 0
|
*/
|
ath6kl_dbg(ATH6KL_DBG_HTC,
|
"HTC ignores Rx Ctrl after setup complete\n");
|
status = -EINVAL;
|
goto free_skb;
|
}
|
|
/* remove HTC header */
|
skb_pull(skb, HTC_HDR_LENGTH);
|
|
netdata = skb->data;
|
netlen = skb->len;
|
|
spin_lock_bh(&target->rx_lock);
|
|
target->pipe.ctrl_response_valid = true;
|
target->pipe.ctrl_response_len = min_t(int, netlen,
|
HTC_MAX_CTRL_MSG_LEN);
|
memcpy(target->pipe.ctrl_response_buf, netdata,
|
target->pipe.ctrl_response_len);
|
|
spin_unlock_bh(&target->rx_lock);
|
|
dev_kfree_skb(skb);
|
skb = NULL;
|
|
goto free_skb;
|
}
|
|
/*
|
* TODO: the message based HIF architecture allocates net bufs
|
* for recv packets since it bridges that HIF to upper layers,
|
* which expects HTC packets, we form the packets here
|
*/
|
packet = alloc_htc_packet_container(target);
|
if (packet == NULL) {
|
status = -ENOMEM;
|
goto free_skb;
|
}
|
|
packet->status = 0;
|
packet->endpoint = htc_hdr->eid;
|
packet->pkt_cntxt = skb;
|
|
/* TODO: for backwards compatibility */
|
packet->buf = skb_push(skb, 0) + HTC_HDR_LENGTH;
|
packet->act_len = netlen - HTC_HDR_LENGTH - trailerlen;
|
|
/*
|
* TODO: this is a hack because the driver layer will set the
|
* actual len of the skb again which will just double the len
|
*/
|
skb_trim(skb, 0);
|
|
recv_packet_completion(target, ep, packet);
|
|
/* recover the packet container */
|
free_htc_packet_container(target, packet);
|
skb = NULL;
|
|
free_skb:
|
dev_kfree_skb(skb);
|
|
return status;
|
}
|
|
static void htc_flush_rx_queue(struct htc_target *target,
|
struct htc_endpoint *ep)
|
{
|
struct list_head container;
|
struct htc_packet *packet;
|
|
spin_lock_bh(&target->rx_lock);
|
|
while (1) {
|
if (list_empty(&ep->rx_bufq))
|
break;
|
|
packet = list_first_entry(&ep->rx_bufq,
|
struct htc_packet, list);
|
list_del(&packet->list);
|
|
spin_unlock_bh(&target->rx_lock);
|
packet->status = -ECANCELED;
|
packet->act_len = 0;
|
|
ath6kl_dbg(ATH6KL_DBG_HTC,
|
"Flushing RX packet:0x%p, length:%d, ep:%d\n",
|
packet, packet->buf_len,
|
packet->endpoint);
|
|
INIT_LIST_HEAD(&container);
|
list_add_tail(&packet->list, &container);
|
|
/* give the packet back */
|
do_recv_completion(ep, &container);
|
spin_lock_bh(&target->rx_lock);
|
}
|
|
spin_unlock_bh(&target->rx_lock);
|
}
|
|
/* polling routine to wait for a control packet to be received */
|
static int htc_wait_recv_ctrl_message(struct htc_target *target)
|
{
|
int count = HTC_TARGET_RESPONSE_POLL_COUNT;
|
|
while (count > 0) {
|
spin_lock_bh(&target->rx_lock);
|
|
if (target->pipe.ctrl_response_valid) {
|
target->pipe.ctrl_response_valid = false;
|
spin_unlock_bh(&target->rx_lock);
|
break;
|
}
|
|
spin_unlock_bh(&target->rx_lock);
|
|
count--;
|
|
msleep_interruptible(HTC_TARGET_RESPONSE_POLL_WAIT);
|
}
|
|
if (count <= 0) {
|
ath6kl_warn("htc pipe control receive timeout!\n");
|
return -ETIMEDOUT;
|
}
|
|
return 0;
|
}
|
|
static void htc_rxctrl_complete(struct htc_target *context,
|
struct htc_packet *packet)
|
{
|
struct sk_buff *skb = packet->skb;
|
|
if (packet->endpoint == ENDPOINT_0 &&
|
packet->status == -ECANCELED &&
|
skb != NULL)
|
dev_kfree_skb(skb);
|
}
|
|
/* htc pipe initialization */
|
static void reset_endpoint_states(struct htc_target *target)
|
{
|
struct htc_endpoint *ep;
|
int i;
|
|
for (i = ENDPOINT_0; i < ENDPOINT_MAX; i++) {
|
ep = &target->endpoint[i];
|
ep->svc_id = 0;
|
ep->len_max = 0;
|
ep->max_txq_depth = 0;
|
ep->eid = i;
|
INIT_LIST_HEAD(&ep->txq);
|
INIT_LIST_HEAD(&ep->pipe.tx_lookup_queue);
|
INIT_LIST_HEAD(&ep->rx_bufq);
|
ep->target = target;
|
ep->pipe.tx_credit_flow_enabled = true;
|
}
|
}
|
|
/* start HTC, this is called after all services are connected */
|
static int htc_config_target_hif_pipe(struct htc_target *target)
|
{
|
return 0;
|
}
|
|
/* htc service functions */
|
static u8 htc_get_credit_alloc(struct htc_target *target, u16 service_id)
|
{
|
u8 allocation = 0;
|
int i;
|
|
for (i = 0; i < ENDPOINT_MAX; i++) {
|
if (target->pipe.txcredit_alloc[i].service_id == service_id)
|
allocation =
|
target->pipe.txcredit_alloc[i].credit_alloc;
|
}
|
|
if (allocation == 0) {
|
ath6kl_dbg(ATH6KL_DBG_HTC,
|
"HTC Service TX : 0x%2.2X : allocation is zero!\n",
|
service_id);
|
}
|
|
return allocation;
|
}
|
|
static int ath6kl_htc_pipe_conn_service(struct htc_target *target,
|
struct htc_service_connect_req *conn_req,
|
struct htc_service_connect_resp *conn_resp)
|
{
|
struct ath6kl *ar = target->dev->ar;
|
struct htc_packet *packet = NULL;
|
struct htc_conn_service_resp *resp_msg;
|
struct htc_conn_service_msg *conn_msg;
|
enum htc_endpoint_id assigned_epid = ENDPOINT_MAX;
|
bool disable_credit_flowctrl = false;
|
unsigned int max_msg_size = 0;
|
struct htc_endpoint *ep;
|
int length, status = 0;
|
struct sk_buff *skb;
|
u8 tx_alloc;
|
u16 flags;
|
|
if (conn_req->svc_id == 0) {
|
WARN_ON_ONCE(1);
|
status = -EINVAL;
|
goto free_packet;
|
}
|
|
if (conn_req->svc_id == HTC_CTRL_RSVD_SVC) {
|
/* special case for pseudo control service */
|
assigned_epid = ENDPOINT_0;
|
max_msg_size = HTC_MAX_CTRL_MSG_LEN;
|
tx_alloc = 0;
|
|
} else {
|
tx_alloc = htc_get_credit_alloc(target, conn_req->svc_id);
|
if (tx_alloc == 0) {
|
status = -ENOMEM;
|
goto free_packet;
|
}
|
|
/* allocate a packet to send to the target */
|
packet = htc_alloc_txctrl_packet(target);
|
|
if (packet == NULL) {
|
WARN_ON_ONCE(1);
|
status = -ENOMEM;
|
goto free_packet;
|
}
|
|
skb = packet->skb;
|
length = sizeof(struct htc_conn_service_msg);
|
|
/* assemble connect service message */
|
conn_msg = skb_put(skb, length);
|
if (conn_msg == NULL) {
|
WARN_ON_ONCE(1);
|
status = -EINVAL;
|
goto free_packet;
|
}
|
|
memset(conn_msg, 0,
|
sizeof(struct htc_conn_service_msg));
|
conn_msg->msg_id = cpu_to_le16(HTC_MSG_CONN_SVC_ID);
|
conn_msg->svc_id = cpu_to_le16(conn_req->svc_id);
|
conn_msg->conn_flags = cpu_to_le16(conn_req->conn_flags &
|
~HTC_CONN_FLGS_SET_RECV_ALLOC_MASK);
|
|
/* tell target desired recv alloc for this ep */
|
flags = tx_alloc << HTC_CONN_FLGS_SET_RECV_ALLOC_SHIFT;
|
conn_msg->conn_flags |= cpu_to_le16(flags);
|
|
if (conn_req->conn_flags &
|
HTC_CONN_FLGS_DISABLE_CRED_FLOW_CTRL) {
|
disable_credit_flowctrl = true;
|
}
|
|
set_htc_pkt_info(packet, NULL, (u8 *) conn_msg,
|
length,
|
ENDPOINT_0, HTC_SERVICE_TX_PACKET_TAG);
|
|
status = ath6kl_htc_pipe_tx(target, packet);
|
|
/* we don't own it anymore */
|
packet = NULL;
|
if (status != 0)
|
goto free_packet;
|
|
/* wait for response */
|
status = htc_wait_recv_ctrl_message(target);
|
if (status != 0)
|
goto free_packet;
|
|
/* we controlled the buffer creation so it has to be
|
* properly aligned
|
*/
|
resp_msg = (struct htc_conn_service_resp *)
|
target->pipe.ctrl_response_buf;
|
|
if (resp_msg->msg_id != cpu_to_le16(HTC_MSG_CONN_SVC_RESP_ID) ||
|
(target->pipe.ctrl_response_len < sizeof(*resp_msg))) {
|
/* this message is not valid */
|
WARN_ON_ONCE(1);
|
status = -EINVAL;
|
goto free_packet;
|
}
|
|
ath6kl_dbg(ATH6KL_DBG_TRC,
|
"%s: service 0x%X conn resp: status: %d ep: %d\n",
|
__func__, resp_msg->svc_id, resp_msg->status,
|
resp_msg->eid);
|
|
conn_resp->resp_code = resp_msg->status;
|
/* check response status */
|
if (resp_msg->status != HTC_SERVICE_SUCCESS) {
|
ath6kl_dbg(ATH6KL_DBG_HTC,
|
"Target failed service 0x%X connect request (status:%d)\n",
|
resp_msg->svc_id, resp_msg->status);
|
status = -EINVAL;
|
goto free_packet;
|
}
|
|
assigned_epid = (enum htc_endpoint_id) resp_msg->eid;
|
max_msg_size = le16_to_cpu(resp_msg->max_msg_sz);
|
}
|
|
/* the rest are parameter checks so set the error status */
|
status = -EINVAL;
|
|
if (assigned_epid >= ENDPOINT_MAX) {
|
WARN_ON_ONCE(1);
|
goto free_packet;
|
}
|
|
if (max_msg_size == 0) {
|
WARN_ON_ONCE(1);
|
goto free_packet;
|
}
|
|
ep = &target->endpoint[assigned_epid];
|
ep->eid = assigned_epid;
|
if (ep->svc_id != 0) {
|
/* endpoint already in use! */
|
WARN_ON_ONCE(1);
|
goto free_packet;
|
}
|
|
/* return assigned endpoint to caller */
|
conn_resp->endpoint = assigned_epid;
|
conn_resp->len_max = max_msg_size;
|
|
/* setup the endpoint */
|
ep->svc_id = conn_req->svc_id; /* this marks ep in use */
|
ep->max_txq_depth = conn_req->max_txq_depth;
|
ep->len_max = max_msg_size;
|
ep->cred_dist.credits = tx_alloc;
|
ep->cred_dist.cred_sz = target->tgt_cred_sz;
|
ep->cred_dist.cred_per_msg = max_msg_size / target->tgt_cred_sz;
|
if (max_msg_size % target->tgt_cred_sz)
|
ep->cred_dist.cred_per_msg++;
|
|
/* copy all the callbacks */
|
ep->ep_cb = conn_req->ep_cb;
|
|
/* initialize tx_drop_packet_threshold */
|
ep->tx_drop_packet_threshold = MAX_HI_COOKIE_NUM;
|
|
status = ath6kl_hif_pipe_map_service(ar, ep->svc_id,
|
&ep->pipe.pipeid_ul,
|
&ep->pipe.pipeid_dl);
|
if (status != 0)
|
goto free_packet;
|
|
ath6kl_dbg(ATH6KL_DBG_HTC,
|
"SVC Ready: 0x%4.4X: ULpipe:%d DLpipe:%d id:%d\n",
|
ep->svc_id, ep->pipe.pipeid_ul,
|
ep->pipe.pipeid_dl, ep->eid);
|
|
if (disable_credit_flowctrl && ep->pipe.tx_credit_flow_enabled) {
|
ep->pipe.tx_credit_flow_enabled = false;
|
ath6kl_dbg(ATH6KL_DBG_HTC,
|
"SVC: 0x%4.4X ep:%d TX flow control off\n",
|
ep->svc_id, assigned_epid);
|
}
|
|
free_packet:
|
if (packet != NULL)
|
htc_free_txctrl_packet(target, packet);
|
return status;
|
}
|
|
/* htc export functions */
|
static void *ath6kl_htc_pipe_create(struct ath6kl *ar)
|
{
|
int status = 0;
|
struct htc_endpoint *ep = NULL;
|
struct htc_target *target = NULL;
|
struct htc_packet *packet;
|
int i;
|
|
target = kzalloc(sizeof(struct htc_target), GFP_KERNEL);
|
if (target == NULL) {
|
ath6kl_err("htc create unable to allocate memory\n");
|
status = -ENOMEM;
|
goto fail_htc_create;
|
}
|
|
spin_lock_init(&target->htc_lock);
|
spin_lock_init(&target->rx_lock);
|
spin_lock_init(&target->tx_lock);
|
|
reset_endpoint_states(target);
|
|
for (i = 0; i < HTC_PACKET_CONTAINER_ALLOCATION; i++) {
|
packet = kzalloc(sizeof(struct htc_packet), GFP_KERNEL);
|
|
if (packet != NULL)
|
free_htc_packet_container(target, packet);
|
}
|
|
target->dev = kzalloc(sizeof(*target->dev), GFP_KERNEL);
|
if (!target->dev) {
|
ath6kl_err("unable to allocate memory\n");
|
status = -ENOMEM;
|
goto fail_htc_create;
|
}
|
target->dev->ar = ar;
|
target->dev->htc_cnxt = target;
|
|
/* Get HIF default pipe for HTC message exchange */
|
ep = &target->endpoint[ENDPOINT_0];
|
|
ath6kl_hif_pipe_get_default(ar, &ep->pipe.pipeid_ul,
|
&ep->pipe.pipeid_dl);
|
|
return target;
|
|
fail_htc_create:
|
if (status != 0) {
|
if (target != NULL)
|
ath6kl_htc_pipe_cleanup(target);
|
|
target = NULL;
|
}
|
return target;
|
}
|
|
/* cleanup the HTC instance */
|
static void ath6kl_htc_pipe_cleanup(struct htc_target *target)
|
{
|
struct htc_packet *packet;
|
|
while (true) {
|
packet = alloc_htc_packet_container(target);
|
if (packet == NULL)
|
break;
|
kfree(packet);
|
}
|
|
kfree(target->dev);
|
|
/* kfree our instance */
|
kfree(target);
|
}
|
|
static int ath6kl_htc_pipe_start(struct htc_target *target)
|
{
|
struct sk_buff *skb;
|
struct htc_setup_comp_ext_msg *setup;
|
struct htc_packet *packet;
|
|
htc_config_target_hif_pipe(target);
|
|
/* allocate a buffer to send */
|
packet = htc_alloc_txctrl_packet(target);
|
if (packet == NULL) {
|
WARN_ON_ONCE(1);
|
return -ENOMEM;
|
}
|
|
skb = packet->skb;
|
|
/* assemble setup complete message */
|
setup = skb_put(skb, sizeof(*setup));
|
memset(setup, 0, sizeof(struct htc_setup_comp_ext_msg));
|
setup->msg_id = cpu_to_le16(HTC_MSG_SETUP_COMPLETE_EX_ID);
|
|
ath6kl_dbg(ATH6KL_DBG_HTC, "HTC using TX credit flow control\n");
|
|
set_htc_pkt_info(packet, NULL, (u8 *) setup,
|
sizeof(struct htc_setup_comp_ext_msg),
|
ENDPOINT_0, HTC_SERVICE_TX_PACKET_TAG);
|
|
target->htc_flags |= HTC_OP_STATE_SETUP_COMPLETE;
|
|
return ath6kl_htc_pipe_tx(target, packet);
|
}
|
|
static void ath6kl_htc_pipe_stop(struct htc_target *target)
|
{
|
int i;
|
struct htc_endpoint *ep;
|
|
/* cleanup endpoints */
|
for (i = 0; i < ENDPOINT_MAX; i++) {
|
ep = &target->endpoint[i];
|
htc_flush_rx_queue(target, ep);
|
htc_flush_tx_endpoint(target, ep, HTC_TX_PACKET_TAG_ALL);
|
}
|
|
reset_endpoint_states(target);
|
target->htc_flags &= ~HTC_OP_STATE_SETUP_COMPLETE;
|
}
|
|
static int ath6kl_htc_pipe_get_rxbuf_num(struct htc_target *target,
|
enum htc_endpoint_id endpoint)
|
{
|
int num;
|
|
spin_lock_bh(&target->rx_lock);
|
num = get_queue_depth(&(target->endpoint[endpoint].rx_bufq));
|
spin_unlock_bh(&target->rx_lock);
|
|
return num;
|
}
|
|
static int ath6kl_htc_pipe_tx(struct htc_target *target,
|
struct htc_packet *packet)
|
{
|
struct list_head queue;
|
|
ath6kl_dbg(ATH6KL_DBG_HTC,
|
"%s: endPointId: %d, buffer: 0x%p, length: %d\n",
|
__func__, packet->endpoint, packet->buf,
|
packet->act_len);
|
|
INIT_LIST_HEAD(&queue);
|
list_add_tail(&packet->list, &queue);
|
|
return htc_send_packets_multiple(target, &queue);
|
}
|
|
static int ath6kl_htc_pipe_wait_target(struct htc_target *target)
|
{
|
struct htc_ready_ext_msg *ready_msg;
|
struct htc_service_connect_req connect;
|
struct htc_service_connect_resp resp;
|
int status = 0;
|
|
status = htc_wait_recv_ctrl_message(target);
|
|
if (status != 0)
|
return status;
|
|
if (target->pipe.ctrl_response_len < sizeof(*ready_msg)) {
|
ath6kl_warn("invalid htc pipe ready msg len: %d\n",
|
target->pipe.ctrl_response_len);
|
return -ECOMM;
|
}
|
|
ready_msg = (struct htc_ready_ext_msg *) target->pipe.ctrl_response_buf;
|
|
if (ready_msg->ver2_0_info.msg_id != cpu_to_le16(HTC_MSG_READY_ID)) {
|
ath6kl_warn("invalid htc pipe ready msg: 0x%x\n",
|
ready_msg->ver2_0_info.msg_id);
|
return -ECOMM;
|
}
|
|
ath6kl_dbg(ATH6KL_DBG_HTC,
|
"Target Ready! : transmit resources : %d size:%d\n",
|
ready_msg->ver2_0_info.cred_cnt,
|
ready_msg->ver2_0_info.cred_sz);
|
|
target->tgt_creds = le16_to_cpu(ready_msg->ver2_0_info.cred_cnt);
|
target->tgt_cred_sz = le16_to_cpu(ready_msg->ver2_0_info.cred_sz);
|
|
if ((target->tgt_creds == 0) || (target->tgt_cred_sz == 0))
|
return -ECOMM;
|
|
htc_setup_target_buffer_assignments(target);
|
|
/* setup our pseudo HTC control endpoint connection */
|
memset(&connect, 0, sizeof(connect));
|
memset(&resp, 0, sizeof(resp));
|
connect.ep_cb.tx_complete = htc_txctrl_complete;
|
connect.ep_cb.rx = htc_rxctrl_complete;
|
connect.max_txq_depth = NUM_CONTROL_TX_BUFFERS;
|
connect.svc_id = HTC_CTRL_RSVD_SVC;
|
|
/* connect fake service */
|
status = ath6kl_htc_pipe_conn_service(target, &connect, &resp);
|
|
return status;
|
}
|
|
static void ath6kl_htc_pipe_flush_txep(struct htc_target *target,
|
enum htc_endpoint_id endpoint, u16 tag)
|
{
|
struct htc_endpoint *ep = &target->endpoint[endpoint];
|
|
if (ep->svc_id == 0) {
|
WARN_ON_ONCE(1);
|
/* not in use.. */
|
return;
|
}
|
|
htc_flush_tx_endpoint(target, ep, tag);
|
}
|
|
static int ath6kl_htc_pipe_add_rxbuf_multiple(struct htc_target *target,
|
struct list_head *pkt_queue)
|
{
|
struct htc_packet *packet, *tmp_pkt, *first;
|
struct htc_endpoint *ep;
|
int status = 0;
|
|
if (list_empty(pkt_queue))
|
return -EINVAL;
|
|
first = list_first_entry(pkt_queue, struct htc_packet, list);
|
|
if (first->endpoint >= ENDPOINT_MAX) {
|
WARN_ON_ONCE(1);
|
return -EINVAL;
|
}
|
|
ath6kl_dbg(ATH6KL_DBG_HTC, "%s: epid: %d, cnt:%d, len: %d\n",
|
__func__, first->endpoint, get_queue_depth(pkt_queue),
|
first->buf_len);
|
|
ep = &target->endpoint[first->endpoint];
|
|
spin_lock_bh(&target->rx_lock);
|
|
/* store receive packets */
|
list_splice_tail_init(pkt_queue, &ep->rx_bufq);
|
|
spin_unlock_bh(&target->rx_lock);
|
|
if (status != 0) {
|
/* walk through queue and mark each one canceled */
|
list_for_each_entry_safe(packet, tmp_pkt, pkt_queue, list) {
|
packet->status = -ECANCELED;
|
}
|
|
do_recv_completion(ep, pkt_queue);
|
}
|
|
return status;
|
}
|
|
static void ath6kl_htc_pipe_activity_changed(struct htc_target *target,
|
enum htc_endpoint_id ep,
|
bool active)
|
{
|
/* TODO */
|
}
|
|
static void ath6kl_htc_pipe_flush_rx_buf(struct htc_target *target)
|
{
|
struct htc_endpoint *endpoint;
|
struct htc_packet *packet, *tmp_pkt;
|
int i;
|
|
for (i = ENDPOINT_0; i < ENDPOINT_MAX; i++) {
|
endpoint = &target->endpoint[i];
|
|
spin_lock_bh(&target->rx_lock);
|
|
list_for_each_entry_safe(packet, tmp_pkt,
|
&endpoint->rx_bufq, list) {
|
list_del(&packet->list);
|
spin_unlock_bh(&target->rx_lock);
|
ath6kl_dbg(ATH6KL_DBG_HTC,
|
"htc rx flush pkt 0x%p len %d ep %d\n",
|
packet, packet->buf_len,
|
packet->endpoint);
|
dev_kfree_skb(packet->pkt_cntxt);
|
spin_lock_bh(&target->rx_lock);
|
}
|
|
spin_unlock_bh(&target->rx_lock);
|
}
|
}
|
|
static int ath6kl_htc_pipe_credit_setup(struct htc_target *target,
|
struct ath6kl_htc_credit_info *info)
|
{
|
return 0;
|
}
|
|
static const struct ath6kl_htc_ops ath6kl_htc_pipe_ops = {
|
.create = ath6kl_htc_pipe_create,
|
.wait_target = ath6kl_htc_pipe_wait_target,
|
.start = ath6kl_htc_pipe_start,
|
.conn_service = ath6kl_htc_pipe_conn_service,
|
.tx = ath6kl_htc_pipe_tx,
|
.stop = ath6kl_htc_pipe_stop,
|
.cleanup = ath6kl_htc_pipe_cleanup,
|
.flush_txep = ath6kl_htc_pipe_flush_txep,
|
.flush_rx_buf = ath6kl_htc_pipe_flush_rx_buf,
|
.activity_changed = ath6kl_htc_pipe_activity_changed,
|
.get_rxbuf_num = ath6kl_htc_pipe_get_rxbuf_num,
|
.add_rxbuf_multiple = ath6kl_htc_pipe_add_rxbuf_multiple,
|
.credit_setup = ath6kl_htc_pipe_credit_setup,
|
.tx_complete = ath6kl_htc_pipe_tx_complete,
|
.rx_complete = ath6kl_htc_pipe_rx_complete,
|
};
|
|
void ath6kl_htc_pipe_attach(struct ath6kl *ar)
|
{
|
ar->htc_ops = &ath6kl_htc_pipe_ops;
|
}
|
