Orange Pi5 kernel

Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards

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/*
* Copyright (c) 2007-2011 Atheros Communications Inc.
* Copyright (c) 2011-2012 Qualcomm Atheros, Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "core.h"
#include "hif.h"
#include "debug.h"
#include "hif-ops.h"
#include "trace.h"
#include <asm/unaligned.h>
#define CALC_TXRX_PADDED_LEN(dev, len) (__ALIGN_MASK((len), (dev)->block_mask))
static void ath6kl_htc_mbox_cleanup(struct htc_target *target);
static void ath6kl_htc_mbox_stop(struct htc_target *target);
static int ath6kl_htc_mbox_add_rxbuf_multiple(struct htc_target *target,
<------><------><------><------><------> struct list_head *pkt_queue);
static void ath6kl_htc_set_credit_dist(struct htc_target *target,
<------><------><------><------> struct ath6kl_htc_credit_info *cred_info,
<------><------><------><------> u16 svc_pri_order[], int len);
/* threshold to re-enable Tx bundling for an AC*/
#define TX_RESUME_BUNDLE_THRESHOLD 1500
/* Functions for Tx credit handling */
static void ath6kl_credit_deposit(struct ath6kl_htc_credit_info *cred_info,
<------><------><------><------> struct htc_endpoint_credit_dist *ep_dist,
<------><------><------><------> int credits)
{
<------>ath6kl_dbg(ATH6KL_DBG_CREDIT, "credit deposit ep %d credits %d\n",
<------><------> ep_dist->endpoint, credits);
<------>ep_dist->credits += credits;
<------>ep_dist->cred_assngd += credits;
<------>cred_info->cur_free_credits -= credits;
}
static void ath6kl_credit_init(struct ath6kl_htc_credit_info *cred_info,
<------><------><------> struct list_head *ep_list,
<------><------><------> int tot_credits)
{
<------>struct htc_endpoint_credit_dist *cur_ep_dist;
<------>int count;
<------>ath6kl_dbg(ATH6KL_DBG_CREDIT, "credit init total %d\n", tot_credits);
<------>cred_info->cur_free_credits = tot_credits;
<------>cred_info->total_avail_credits = tot_credits;
<------>list_for_each_entry(cur_ep_dist, ep_list, list) {
<------><------>if (cur_ep_dist->endpoint == ENDPOINT_0)
<------><------><------>continue;
<------><------>cur_ep_dist->cred_min = cur_ep_dist->cred_per_msg;
<------><------>if (tot_credits > 4) {
<------><------><------>if ((cur_ep_dist->svc_id == WMI_DATA_BK_SVC) ||
<------><------><------> (cur_ep_dist->svc_id == WMI_DATA_BE_SVC)) {
<------><------><------><------>ath6kl_credit_deposit(cred_info,
<------><------><------><------><------><------> cur_ep_dist,
<------><------><------><------><------><------> cur_ep_dist->cred_min);
<------><------><------><------>cur_ep_dist->dist_flags |= HTC_EP_ACTIVE;
<------><------><------>}
<------><------>}
<------><------>if (cur_ep_dist->svc_id == WMI_CONTROL_SVC) {
<------><------><------>ath6kl_credit_deposit(cred_info, cur_ep_dist,
<------><------><------><------><------> cur_ep_dist->cred_min);
<------><------><------>/*
<------><------><------> * Control service is always marked active, it
<------><------><------> * never goes inactive EVER.
<------><------><------> */
<------><------><------>cur_ep_dist->dist_flags |= HTC_EP_ACTIVE;
<------><------>}
<------><------>/*
<------><------> * Streams have to be created (explicit | implicit) for all
<------><------> * kinds of traffic. BE endpoints are also inactive in the
<------><------> * beginning. When BE traffic starts it creates implicit
<------><------> * streams that redistributes credits.
<------><------> *
<------><------> * Note: all other endpoints have minimums set but are
<------><------> * initially given NO credits. credits will be distributed
<------><------> * as traffic activity demands
<------><------> */
<------>}
<------>/*
<------> * For ath6kl_credit_seek function,
<------> * it use list_for_each_entry_reverse to walk around the whole ep list.
<------> * Therefore assign this lowestpri_ep_dist after walk around the ep_list
<------> */
<------>cred_info->lowestpri_ep_dist = cur_ep_dist->list;
<------>WARN_ON(cred_info->cur_free_credits <= 0);
<------>list_for_each_entry(cur_ep_dist, ep_list, list) {
<------><------>if (cur_ep_dist->endpoint == ENDPOINT_0)
<------><------><------>continue;
<------><------>if (cur_ep_dist->svc_id == WMI_CONTROL_SVC) {
<------><------><------>cur_ep_dist->cred_norm = cur_ep_dist->cred_per_msg;
<------><------>} else {
<------><------><------>/*
<------><------><------> * For the remaining data endpoints, we assume that
<------><------><------> * each cred_per_msg are the same. We use a simple
<------><------><------> * calculation here, we take the remaining credits
<------><------><------> * and determine how many max messages this can
<------><------><------> * cover and then set each endpoint's normal value
<------><------><------> * equal to 3/4 this amount.
<------><------><------> */
<------><------><------>count = (cred_info->cur_free_credits /
<------><------><------><------> cur_ep_dist->cred_per_msg)
<------><------><------><------>* cur_ep_dist->cred_per_msg;
<------><------><------>count = (count * 3) >> 2;
<------><------><------>count = max(count, cur_ep_dist->cred_per_msg);
<------><------><------>cur_ep_dist->cred_norm = count;
<------><------>}
<------><------>ath6kl_dbg(ATH6KL_DBG_CREDIT,
<------><------><------> "credit ep %d svc_id %d credits %d per_msg %d norm %d min %d\n",
<------><------><------> cur_ep_dist->endpoint,
<------><------><------> cur_ep_dist->svc_id,
<------><------><------> cur_ep_dist->credits,
<------><------><------> cur_ep_dist->cred_per_msg,
<------><------><------> cur_ep_dist->cred_norm,
<------><------><------> cur_ep_dist->cred_min);
<------>}
}
/* initialize and setup credit distribution */
static int ath6kl_htc_mbox_credit_setup(struct htc_target *htc_target,
<------><------><------> struct ath6kl_htc_credit_info *cred_info)
{
<------>u16 servicepriority[5];
<------>memset(cred_info, 0, sizeof(struct ath6kl_htc_credit_info));
<------>servicepriority[0] = WMI_CONTROL_SVC; /* highest */
<------>servicepriority[1] = WMI_DATA_VO_SVC;
<------>servicepriority[2] = WMI_DATA_VI_SVC;
<------>servicepriority[3] = WMI_DATA_BE_SVC;
<------>servicepriority[4] = WMI_DATA_BK_SVC; /* lowest */
<------>/* set priority list */
<------>ath6kl_htc_set_credit_dist(htc_target, cred_info, servicepriority, 5);
<------>return 0;
}
/* reduce an ep's credits back to a set limit */
static void ath6kl_credit_reduce(struct ath6kl_htc_credit_info *cred_info,
<------><------><------><------> struct htc_endpoint_credit_dist *ep_dist,
<------><------><------><------> int limit)
{
<------>int credits;
<------>ath6kl_dbg(ATH6KL_DBG_CREDIT, "credit reduce ep %d limit %d\n",
<------><------> ep_dist->endpoint, limit);
<------>ep_dist->cred_assngd = limit;
<------>if (ep_dist->credits <= limit)
<------><------>return;
<------>credits = ep_dist->credits - limit;
<------>ep_dist->credits -= credits;
<------>cred_info->cur_free_credits += credits;
}
static void ath6kl_credit_update(struct ath6kl_htc_credit_info *cred_info,
<------><------><------><------> struct list_head *epdist_list)
{
<------>struct htc_endpoint_credit_dist *cur_list;
<------>list_for_each_entry(cur_list, epdist_list, list) {
<------><------>if (cur_list->endpoint == ENDPOINT_0)
<------><------><------>continue;
<------><------>if (cur_list->cred_to_dist > 0) {
<------><------><------>cur_list->credits += cur_list->cred_to_dist;
<------><------><------>cur_list->cred_to_dist = 0;
<------><------><------>if (cur_list->credits > cur_list->cred_assngd)
<------><------><------><------>ath6kl_credit_reduce(cred_info,
<------><------><------><------><------><------> cur_list,
<------><------><------><------><------><------> cur_list->cred_assngd);
<------><------><------>if (cur_list->credits > cur_list->cred_norm)
<------><------><------><------>ath6kl_credit_reduce(cred_info, cur_list,
<------><------><------><------><------><------> cur_list->cred_norm);
<------><------><------>if (!(cur_list->dist_flags & HTC_EP_ACTIVE)) {
<------><------><------><------>if (cur_list->txq_depth == 0)
<------><------><------><------><------>ath6kl_credit_reduce(cred_info,
<------><------><------><------><------><------><------> cur_list, 0);
<------><------><------>}
<------><------>}
<------>}
}
/*
* HTC has an endpoint that needs credits, ep_dist is the endpoint in
* question.
*/
static void ath6kl_credit_seek(struct ath6kl_htc_credit_info *cred_info,
<------><------><------><------>struct htc_endpoint_credit_dist *ep_dist)
{
<------>struct htc_endpoint_credit_dist *curdist_list;
<------>int credits = 0;
<------>int need;
<------>if (ep_dist->svc_id == WMI_CONTROL_SVC)
<------><------>goto out;
<------>if ((ep_dist->svc_id == WMI_DATA_VI_SVC) ||
<------> (ep_dist->svc_id == WMI_DATA_VO_SVC))
<------><------>if ((ep_dist->cred_assngd >= ep_dist->cred_norm))
<------><------><------>goto out;
<------>/*
<------> * For all other services, we follow a simple algorithm of:
<------> *
<------> * 1. checking the free pool for credits
<------> * 2. checking lower priority endpoints for credits to take
<------> */
<------>credits = min(cred_info->cur_free_credits, ep_dist->seek_cred);
<------>if (credits >= ep_dist->seek_cred)
<------><------>goto out;
<------>/*
<------> * We don't have enough in the free pool, try taking away from
<------> * lower priority services The rule for taking away credits:
<------> *
<------> * 1. Only take from lower priority endpoints
<------> * 2. Only take what is allocated above the minimum (never
<------> * starve an endpoint completely)
<------> * 3. Only take what you need.
<------> */
<------>list_for_each_entry_reverse(curdist_list,
<------><------><------><------> &cred_info->lowestpri_ep_dist,
<------><------><------><------> list) {
<------><------>if (curdist_list == ep_dist)
<------><------><------>break;
<------><------>need = ep_dist->seek_cred - cred_info->cur_free_credits;
<------><------>if ((curdist_list->cred_assngd - need) >=
<------><------> curdist_list->cred_min) {
<------><------><------>/*
<------><------><------> * The current one has been allocated more than
<------><------><------> * it's minimum and it has enough credits assigned
<------><------><------> * above it's minimum to fulfill our need try to
<------><------><------> * take away just enough to fulfill our need.
<------><------><------> */
<------><------><------>ath6kl_credit_reduce(cred_info, curdist_list,
<------><------><------><------><------> curdist_list->cred_assngd - need);
<------><------><------>if (cred_info->cur_free_credits >=
<------><------><------> ep_dist->seek_cred)
<------><------><------><------>break;
<------><------>}
<------><------>if (curdist_list->endpoint == ENDPOINT_0)
<------><------><------>break;
<------>}
<------>credits = min(cred_info->cur_free_credits, ep_dist->seek_cred);
out:
<------>/* did we find some credits? */
<------>if (credits)
<------><------>ath6kl_credit_deposit(cred_info, ep_dist, credits);
<------>ep_dist->seek_cred = 0;
}
/* redistribute credits based on activity change */
static void ath6kl_credit_redistribute(struct ath6kl_htc_credit_info *info,
<------><------><------><------> struct list_head *ep_dist_list)
{
<------>struct htc_endpoint_credit_dist *curdist_list;
<------>list_for_each_entry(curdist_list, ep_dist_list, list) {
<------><------>if (curdist_list->endpoint == ENDPOINT_0)
<------><------><------>continue;
<------><------>if ((curdist_list->svc_id == WMI_DATA_BK_SVC) ||
<------><------> (curdist_list->svc_id == WMI_DATA_BE_SVC))
<------><------><------>curdist_list->dist_flags |= HTC_EP_ACTIVE;
<------><------>if ((curdist_list->svc_id != WMI_CONTROL_SVC) &&
<------><------> !(curdist_list->dist_flags & HTC_EP_ACTIVE)) {
<------><------><------>if (curdist_list->txq_depth == 0)
<------><------><------><------>ath6kl_credit_reduce(info, curdist_list, 0);
<------><------><------>else
<------><------><------><------>ath6kl_credit_reduce(info,
<------><------><------><------><------><------> curdist_list,
<------><------><------><------><------><------> curdist_list->cred_min);
<------><------>}
<------>}
}
/*
*
* This function is invoked whenever endpoints require credit
* distributions. A lock is held while this function is invoked, this
* function shall NOT block. The ep_dist_list is a list of distribution
* structures in prioritized order as defined by the call to the
* htc_set_credit_dist() api.
*/
static void ath6kl_credit_distribute(struct ath6kl_htc_credit_info *cred_info,
<------><------><------><------> struct list_head *ep_dist_list,
<------><------><------> enum htc_credit_dist_reason reason)
{
<------>switch (reason) {
<------>case HTC_CREDIT_DIST_SEND_COMPLETE:
<------><------>ath6kl_credit_update(cred_info, ep_dist_list);
<------><------>break;
<------>case HTC_CREDIT_DIST_ACTIVITY_CHANGE:
<------><------>ath6kl_credit_redistribute(cred_info, ep_dist_list);
<------><------>break;
<------>default:
<------><------>break;
<------>}
<------>WARN_ON(cred_info->cur_free_credits > cred_info->total_avail_credits);
<------>WARN_ON(cred_info->cur_free_credits < 0);
}
static void ath6kl_htc_tx_buf_align(u8 **buf, unsigned long len)
{
<------>u8 *align_addr;
<------>if (!IS_ALIGNED((unsigned long) *buf, 4)) {
<------><------>align_addr = PTR_ALIGN(*buf - 4, 4);
<------><------>memmove(align_addr, *buf, len);
<------><------>*buf = align_addr;
<------>}
}
static void ath6kl_htc_tx_prep_pkt(struct htc_packet *packet, u8 flags,
<------><------><------><------> int ctrl0, int ctrl1)
{
<------>struct htc_frame_hdr *hdr;
<------>packet->buf -= HTC_HDR_LENGTH;
<------>hdr = (struct htc_frame_hdr *)packet->buf;
<------>/* Endianess? */
<------>put_unaligned((u16)packet->act_len, &hdr->payld_len);
<------>hdr->flags = flags;
<------>hdr->eid = packet->endpoint;
<------>hdr->ctrl[0] = ctrl0;
<------>hdr->ctrl[1] = ctrl1;
}
static void htc_reclaim_txctrl_buf(struct htc_target *target,
<------><------><------><------> struct htc_packet *pkt)
{
<------>spin_lock_bh(&target->htc_lock);
<------>list_add_tail(&pkt->list, &target->free_ctrl_txbuf);
<------>spin_unlock_bh(&target->htc_lock);
}
static struct htc_packet *htc_get_control_buf(struct htc_target *target,
<------><------><------><------><------> bool tx)
{
<------>struct htc_packet *packet = NULL;
<------>struct list_head *buf_list;
<------>buf_list = tx ? &target->free_ctrl_txbuf : &target->free_ctrl_rxbuf;
<------>spin_lock_bh(&target->htc_lock);
<------>if (list_empty(buf_list)) {
<------><------>spin_unlock_bh(&target->htc_lock);
<------><------>return NULL;
<------>}
<------>packet = list_first_entry(buf_list, struct htc_packet, list);
<------>list_del(&packet->list);
<------>spin_unlock_bh(&target->htc_lock);
<------>if (tx)
<------><------>packet->buf = packet->buf_start + HTC_HDR_LENGTH;
<------>return packet;
}
static void htc_tx_comp_update(struct htc_target *target,
<------><------><------> struct htc_endpoint *endpoint,
<------><------><------> struct htc_packet *packet)
{
<------>packet->completion = NULL;
<------>packet->buf += HTC_HDR_LENGTH;
<------>if (!packet->status)
<------><------>return;
<------>ath6kl_err("req failed (status:%d, ep:%d, len:%d creds:%d)\n",
<------><------> packet->status, packet->endpoint, packet->act_len,
<------><------> packet->info.tx.cred_used);
<------>/* on failure to submit, reclaim credits for this packet */
<------>spin_lock_bh(&target->tx_lock);
<------>endpoint->cred_dist.cred_to_dist +=
<------><------><------><------>packet->info.tx.cred_used;
<------>endpoint->cred_dist.txq_depth = get_queue_depth(&endpoint->txq);
<------>ath6kl_dbg(ATH6KL_DBG_HTC, "htc tx ctxt 0x%p dist 0x%p\n",
<------><------> target->credit_info, &target->cred_dist_list);
<------>ath6kl_credit_distribute(target->credit_info,
<------><------><------><------> &target->cred_dist_list,
<------><------><------><------> HTC_CREDIT_DIST_SEND_COMPLETE);
<------>spin_unlock_bh(&target->tx_lock);
}
static void htc_tx_complete(struct htc_endpoint *endpoint,
<------><------><------> struct list_head *txq)
{
<------>if (list_empty(txq))
<------><------>return;
<------>ath6kl_dbg(ATH6KL_DBG_HTC,
<------><------> "htc tx complete ep %d pkts %d\n",
<------><------> endpoint->eid, get_queue_depth(txq));
<------>ath6kl_tx_complete(endpoint->target, txq);
}
static void htc_tx_comp_handler(struct htc_target *target,
<------><------><------><------>struct htc_packet *packet)
{
<------>struct htc_endpoint *endpoint = &target->endpoint[packet->endpoint];
<------>struct list_head container;
<------>ath6kl_dbg(ATH6KL_DBG_HTC, "htc tx complete seqno %d\n",
<------><------> packet->info.tx.seqno);
<------>htc_tx_comp_update(target, endpoint, packet);
<------>INIT_LIST_HEAD(&container);
<------>list_add_tail(&packet->list, &container);
<------>/* do completion */
<------>htc_tx_complete(endpoint, &container);
}
static void htc_async_tx_scat_complete(struct htc_target *target,
<------><------><------><------> struct hif_scatter_req *scat_req)
{
<------>struct htc_endpoint *endpoint;
<------>struct htc_packet *packet;
<------>struct list_head tx_compq;
<------>int i;
<------>INIT_LIST_HEAD(&tx_compq);
<------>ath6kl_dbg(ATH6KL_DBG_HTC,
<------><------> "htc tx scat complete len %d entries %d\n",
<------><------> scat_req->len, scat_req->scat_entries);
<------>if (scat_req->status)
<------><------>ath6kl_err("send scatter req failed: %d\n", scat_req->status);
<------>packet = scat_req->scat_list[0].packet;
<------>endpoint = &target->endpoint[packet->endpoint];
<------>/* walk through the scatter list and process */
<------>for (i = 0; i < scat_req->scat_entries; i++) {
<------><------>packet = scat_req->scat_list[i].packet;
<------><------>if (!packet) {
<------><------><------>WARN_ON(1);
<------><------><------>return;
<------><------>}
<------><------>packet->status = scat_req->status;
<------><------>htc_tx_comp_update(target, endpoint, packet);
<------><------>list_add_tail(&packet->list, &tx_compq);
<------>}
<------>/* free scatter request */
<------>hif_scatter_req_add(target->dev->ar, scat_req);
<------>/* complete all packets */
<------>htc_tx_complete(endpoint, &tx_compq);
}
static int ath6kl_htc_tx_issue(struct htc_target *target,
<------><------><------> struct htc_packet *packet)
{
<------>int status;
<------>bool sync = false;
<------>u32 padded_len, send_len;
<------>if (!packet->completion)
<------><------>sync = true;
<------>send_len = packet->act_len + HTC_HDR_LENGTH;
<------>padded_len = CALC_TXRX_PADDED_LEN(target, send_len);
<------>ath6kl_dbg(ATH6KL_DBG_HTC,
<------><------> "htc tx issue len %d seqno %d padded_len %d mbox 0x%X %s\n",
<------><------> send_len, packet->info.tx.seqno, padded_len,
<------><------> target->dev->ar->mbox_info.htc_addr,
<------><------> sync ? "sync" : "async");
<------>if (sync) {
<------><------>status = hif_read_write_sync(target->dev->ar,
<------><------><------><------>target->dev->ar->mbox_info.htc_addr,
<------><------><------><------> packet->buf, padded_len,
<------><------><------><------> HIF_WR_SYNC_BLOCK_INC);
<------><------>packet->status = status;
<------><------>packet->buf += HTC_HDR_LENGTH;
<------>} else
<------><------>status = hif_write_async(target->dev->ar,
<------><------><------><------>target->dev->ar->mbox_info.htc_addr,
<------><------><------><------>packet->buf, padded_len,
<------><------><------><------>HIF_WR_ASYNC_BLOCK_INC, packet);
<------>trace_ath6kl_htc_tx(status, packet->endpoint, packet->buf, send_len);
<------>return status;
}
static int htc_check_credits(struct htc_target *target,
<------><------><------> struct htc_endpoint *ep, u8 *flags,
<------><------><------> enum htc_endpoint_id eid, unsigned int len,
<------><------><------> int *req_cred)
{
<------>*req_cred = (len > target->tgt_cred_sz) ?
<------><------> DIV_ROUND_UP(len, target->tgt_cred_sz) : 1;
<------>ath6kl_dbg(ATH6KL_DBG_CREDIT, "credit check need %d got %d\n",
<------><------> *req_cred, ep->cred_dist.credits);
<------>if (ep->cred_dist.credits < *req_cred) {
<------><------>if (eid == ENDPOINT_0)
<------><------><------>return -EINVAL;
<------><------>/* Seek more credits */
<------><------>ep->cred_dist.seek_cred = *req_cred - ep->cred_dist.credits;
<------><------>ath6kl_credit_seek(target->credit_info, &ep->cred_dist);
<------><------>ep->cred_dist.seek_cred = 0;
<------><------>if (ep->cred_dist.credits < *req_cred) {
<------><------><------>ath6kl_dbg(ATH6KL_DBG_CREDIT,
<------><------><------><------> "credit not found for ep %d\n",
<------><------><------><------> eid);
<------><------><------>return -EINVAL;
<------><------>}
<------>}
<------>ep->cred_dist.credits -= *req_cred;
<------>ep->ep_st.cred_cosumd += *req_cred;
<------> /* When we are getting low on credits, ask for more */
<------>if (ep->cred_dist.credits < ep->cred_dist.cred_per_msg) {
<------><------>ep->cred_dist.seek_cred =
<------><------>ep->cred_dist.cred_per_msg - ep->cred_dist.credits;
<------><------>ath6kl_credit_seek(target->credit_info, &ep->cred_dist);
<------><------>/* see if we were successful in getting more */
<------><------>if (ep->cred_dist.credits < ep->cred_dist.cred_per_msg) {
<------><------><------>/* tell the target we need credits ASAP! */
<------><------><------>*flags |= HTC_FLAGS_NEED_CREDIT_UPDATE;
<------><------><------>ep->ep_st.cred_low_indicate += 1;
<------><------><------>ath6kl_dbg(ATH6KL_DBG_CREDIT,
<------><------><------><------> "credit we need credits asap\n");
<------><------>}
<------>}
<------>return 0;
}
static void ath6kl_htc_tx_pkts_get(struct htc_target *target,
<------><------><------><------> struct htc_endpoint *endpoint,
<------><------><------><------> struct list_head *queue)
{
<------>int req_cred;
<------>u8 flags;
<------>struct htc_packet *packet;
<------>unsigned int len;
<------>while (true) {
<------><------>flags = 0;
<------><------>if (list_empty(&endpoint->txq))
<------><------><------>break;
<------><------>packet = list_first_entry(&endpoint->txq, struct htc_packet,
<------><------><------><------><------> list);
<------><------>ath6kl_dbg(ATH6KL_DBG_HTC,
<------><------><------> "htc tx got packet 0x%p queue depth %d\n",
<------><------><------> packet, get_queue_depth(&endpoint->txq));
<------><------>len = CALC_TXRX_PADDED_LEN(target,
<------><------><------><------><------> packet->act_len + HTC_HDR_LENGTH);
<------><------>if (htc_check_credits(target, endpoint, &flags,
<------><------><------><------> packet->endpoint, len, &req_cred))
<------><------><------>break;
<------><------>/* now we can fully move onto caller's queue */
<------><------>packet = list_first_entry(&endpoint->txq, struct htc_packet,
<------><------><------><------><------> list);
<------><------>list_move_tail(&packet->list, queue);
<------><------>/* save the number of credits this packet consumed */
<------><------>packet->info.tx.cred_used = req_cred;
<------><------>/* all TX packets are handled asynchronously */
<------><------>packet->completion = htc_tx_comp_handler;
<------><------>packet->context = target;
<------><------>endpoint->ep_st.tx_issued += 1;
<------><------>/* save send flags */
<------><------>packet->info.tx.flags = flags;
<------><------>packet->info.tx.seqno = endpoint->seqno;
<------><------>endpoint->seqno++;
<------>}
}
/* See if the padded tx length falls on a credit boundary */
static int htc_get_credit_padding(unsigned int cred_sz, int *len,
<------><------><------><------> struct htc_endpoint *ep)
{
<------>int rem_cred, cred_pad;
<------>rem_cred = *len % cred_sz;
<------>/* No padding needed */
<------>if (!rem_cred)
<------><------>return 0;
<------>if (!(ep->conn_flags & HTC_FLGS_TX_BNDL_PAD_EN))
<------><------>return -1;
<------>/*
<------> * The transfer consumes a "partial" credit, this
<------> * packet cannot be bundled unless we add
<------> * additional "dummy" padding (max 255 bytes) to
<------> * consume the entire credit.
<------> */
<------>cred_pad = *len < cred_sz ? (cred_sz - *len) : rem_cred;
<------>if ((cred_pad > 0) && (cred_pad <= 255))
<------><------>*len += cred_pad;
<------>else
<------><------>/* The amount of padding is too large, send as non-bundled */
<------><------>return -1;
<------>return cred_pad;
}
static int ath6kl_htc_tx_setup_scat_list(struct htc_target *target,
<------><------><------><------><------> struct htc_endpoint *endpoint,
<------><------><------><------><------> struct hif_scatter_req *scat_req,
<------><------><------><------><------> int n_scat,
<------><------><------><------><------> struct list_head *queue)
{
<------>struct htc_packet *packet;
<------>int i, len, rem_scat, cred_pad;
<------>int status = 0;
<------>u8 flags;
<------>rem_scat = target->max_tx_bndl_sz;
<------>for (i = 0; i < n_scat; i++) {
<------><------>scat_req->scat_list[i].packet = NULL;
<------><------>if (list_empty(queue))
<------><------><------>break;
<------><------>packet = list_first_entry(queue, struct htc_packet, list);
<------><------>len = CALC_TXRX_PADDED_LEN(target,
<------><------><------><------><------> packet->act_len + HTC_HDR_LENGTH);
<------><------>cred_pad = htc_get_credit_padding(target->tgt_cred_sz,
<------><------><------><------><------><------> &len, endpoint);
<------><------>if (cred_pad < 0 || rem_scat < len) {
<------><------><------>status = -ENOSPC;
<------><------><------>break;
<------><------>}
<------><------>rem_scat -= len;
<------><------>/* now remove it from the queue */
<------><------>list_del(&packet->list);
<------><------>scat_req->scat_list[i].packet = packet;
<------><------>/* prepare packet and flag message as part of a send bundle */
<------><------>flags = packet->info.tx.flags | HTC_FLAGS_SEND_BUNDLE;
<------><------>ath6kl_htc_tx_prep_pkt(packet, flags,
<------><------><------><------> cred_pad, packet->info.tx.seqno);
<------><------>/* Make sure the buffer is 4-byte aligned */
<------><------>ath6kl_htc_tx_buf_align(&packet->buf,
<------><------><------><------><------>packet->act_len + HTC_HDR_LENGTH);
<------><------>scat_req->scat_list[i].buf = packet->buf;
<------><------>scat_req->scat_list[i].len = len;
<------><------>scat_req->len += len;
<------><------>scat_req->scat_entries++;
<------><------>ath6kl_dbg(ATH6KL_DBG_HTC,
<------><------><------> "htc tx adding (%d) pkt 0x%p seqno %d len %d remaining %d\n",
<------><------><------> i, packet, packet->info.tx.seqno, len, rem_scat);
<------>}
<------>/* Roll back scatter setup in case of any failure */
<------>if (scat_req->scat_entries < HTC_MIN_HTC_MSGS_TO_BUNDLE) {
<------><------>for (i = scat_req->scat_entries - 1; i >= 0; i--) {
<------><------><------>packet = scat_req->scat_list[i].packet;
<------><------><------>if (packet) {
<------><------><------><------>packet->buf += HTC_HDR_LENGTH;
<------><------><------><------>list_add(&packet->list, queue);
<------><------><------>}
<------><------>}
<------><------>return -EAGAIN;
<------>}
<------>return status;
}
/*
* Drain a queue and send as bundles this function may return without fully
* draining the queue when
*
* 1. scatter resources are exhausted
* 2. a message that will consume a partial credit will stop the
* bundling process early
* 3. we drop below the minimum number of messages for a bundle
*/
static void ath6kl_htc_tx_bundle(struct htc_endpoint *endpoint,
<------><------><------><------> struct list_head *queue,
<------><------><------><------> int *sent_bundle, int *n_bundle_pkts)
{
<------>struct htc_target *target = endpoint->target;
<------>struct hif_scatter_req *scat_req = NULL;
<------>int n_scat, n_sent_bundle = 0, tot_pkts_bundle = 0, i;
<------>struct htc_packet *packet;
<------>int status;
<------>u32 txb_mask;
<------>u8 ac = WMM_NUM_AC;
<------>if ((HTC_CTRL_RSVD_SVC != endpoint->svc_id) &&
<------> (WMI_CONTROL_SVC != endpoint->svc_id))
<------><------>ac = target->dev->ar->ep2ac_map[endpoint->eid];
<------>while (true) {
<------><------>status = 0;
<------><------>n_scat = get_queue_depth(queue);
<------><------>n_scat = min(n_scat, target->msg_per_bndl_max);
<------><------>if (n_scat < HTC_MIN_HTC_MSGS_TO_BUNDLE)
<------><------><------>/* not enough to bundle */
<------><------><------>break;
<------><------>scat_req = hif_scatter_req_get(target->dev->ar);
<------><------>if (!scat_req) {
<------><------><------>/* no scatter resources */
<------><------><------>ath6kl_dbg(ATH6KL_DBG_HTC,
<------><------><------><------> "htc tx no more scatter resources\n");
<------><------><------>break;
<------><------>}
<------><------>if ((ac < WMM_NUM_AC) && (ac != WMM_AC_BK)) {
<------><------><------>if (WMM_AC_BE == ac)
<------><------><------><------>/*
<------><------><------><------> * BE, BK have priorities and bit
<------><------><------><------> * positions reversed
<------><------><------><------> */
<------><------><------><------>txb_mask = (1 << WMM_AC_BK);
<------><------><------>else
<------><------><------><------>/*
<------><------><------><------> * any AC with priority lower than
<------><------><------><------> * itself
<------><------><------><------> */
<------><------><------><------>txb_mask = ((1 << ac) - 1);
<------><------><------>/*
<------><------><------> * when the scatter request resources drop below a
<------><------><------> * certain threshold, disable Tx bundling for all
<------><------><------> * AC's with priority lower than the current requesting
<------><------><------> * AC. Otherwise re-enable Tx bundling for them
<------><------><------> */
<------><------><------>if (scat_req->scat_q_depth < ATH6KL_SCATTER_REQS)
<------><------><------><------>target->tx_bndl_mask &= ~txb_mask;
<------><------><------>else
<------><------><------><------>target->tx_bndl_mask |= txb_mask;
<------><------>}
<------><------>ath6kl_dbg(ATH6KL_DBG_HTC, "htc tx pkts to scatter: %d\n",
<------><------><------> n_scat);
<------><------>scat_req->len = 0;
<------><------>scat_req->scat_entries = 0;
<------><------>status = ath6kl_htc_tx_setup_scat_list(target, endpoint,
<------><------><------><------><------><------> scat_req, n_scat,
<------><------><------><------><------><------> queue);
<------><------>if (status == -EAGAIN) {
<------><------><------>hif_scatter_req_add(target->dev->ar, scat_req);
<------><------><------>break;
<------><------>}
<------><------>/* send path is always asynchronous */
<------><------>scat_req->complete = htc_async_tx_scat_complete;
<------><------>n_sent_bundle++;
<------><------>tot_pkts_bundle += scat_req->scat_entries;
<------><------>ath6kl_dbg(ATH6KL_DBG_HTC,
<------><------><------> "htc tx scatter bytes %d entries %d\n",
<------><------><------> scat_req->len, scat_req->scat_entries);
<------><------>for (i = 0; i < scat_req->scat_entries; i++) {
<------><------><------>packet = scat_req->scat_list[i].packet;
<------><------><------>trace_ath6kl_htc_tx(packet->status, packet->endpoint,
<------><------><------><------><------> packet->buf, packet->act_len);
<------><------>}
<------><------>ath6kl_hif_submit_scat_req(target->dev, scat_req, false);
<------><------>if (status)
<------><------><------>break;
<------>}
<------>*sent_bundle = n_sent_bundle;
<------>*n_bundle_pkts = tot_pkts_bundle;
<------>ath6kl_dbg(ATH6KL_DBG_HTC, "htc tx bundle sent %d pkts\n",
<------><------> n_sent_bundle);
<------>return;
}
static void ath6kl_htc_tx_from_queue(struct htc_target *target,
<------><------><------><------> struct htc_endpoint *endpoint)
{
<------>struct list_head txq;
<------>struct htc_packet *packet;
<------>int bundle_sent;
<------>int n_pkts_bundle;
<------>u8 ac = WMM_NUM_AC;
<------>int status;
<------>spin_lock_bh(&target->tx_lock);
<------>endpoint->tx_proc_cnt++;
<------>if (endpoint->tx_proc_cnt > 1) {
<------><------>endpoint->tx_proc_cnt--;
<------><------>spin_unlock_bh(&target->tx_lock);
<------><------>ath6kl_dbg(ATH6KL_DBG_HTC, "htc tx busy\n");
<------><------>return;
<------>}
<------>/*
<------> * drain the endpoint TX queue for transmission as long
<------> * as we have enough credits.
<------> */
<------>INIT_LIST_HEAD(&txq);
<------>if ((HTC_CTRL_RSVD_SVC != endpoint->svc_id) &&
<------> (WMI_CONTROL_SVC != endpoint->svc_id))
<------><------>ac = target->dev->ar->ep2ac_map[endpoint->eid];
<------>while (true) {
<------><------>if (list_empty(&endpoint->txq))
<------><------><------>break;
<------><------>ath6kl_htc_tx_pkts_get(target, endpoint, &txq);
<------><------>if (list_empty(&txq))
<------><------><------>break;
<------><------>spin_unlock_bh(&target->tx_lock);
<------><------>bundle_sent = 0;
<------><------>n_pkts_bundle = 0;
<------><------>while (true) {
<------><------><------>/* try to send a bundle on each pass */
<------><------><------>if ((target->tx_bndl_mask) &&
<------><------><------> (get_queue_depth(&txq) >=
<------><------><------> HTC_MIN_HTC_MSGS_TO_BUNDLE)) {
<------><------><------><------>int temp1 = 0, temp2 = 0;
<------><------><------><------>/* check if bundling is enabled for an AC */
<------><------><------><------>if (target->tx_bndl_mask & (1 << ac)) {
<------><------><------><------><------>ath6kl_htc_tx_bundle(endpoint, &txq,
<------><------><------><------><------><------><------> &temp1, &temp2);
<------><------><------><------><------>bundle_sent += temp1;
<------><------><------><------><------>n_pkts_bundle += temp2;
<------><------><------><------>}
<------><------><------>}
<------><------><------>if (list_empty(&txq))
<------><------><------><------>break;
<------><------><------>packet = list_first_entry(&txq, struct htc_packet,
<------><------><------><------><------><------> list);
<------><------><------>list_del(&packet->list);
<------><------><------>ath6kl_htc_tx_prep_pkt(packet, packet->info.tx.flags,
<------><------><------><------><------> 0, packet->info.tx.seqno);
<------><------><------>status = ath6kl_htc_tx_issue(target, packet);
<------><------><------>if (status) {
<------><------><------><------>packet->status = status;
<------><------><------><------>packet->completion(packet->context, packet);
<------><------><------>}
<------><------>}
<------><------>spin_lock_bh(&target->tx_lock);
<------><------>endpoint->ep_st.tx_bundles += bundle_sent;
<------><------>endpoint->ep_st.tx_pkt_bundled += n_pkts_bundle;
<------><------>/*
<------><------> * if an AC has bundling disabled and no tx bundling
<------><------> * has occured continously for a certain number of TX,
<------><------> * enable tx bundling for this AC
<------><------> */
<------><------>if (!bundle_sent) {
<------><------><------>if (!(target->tx_bndl_mask & (1 << ac)) &&
<------><------><------> (ac < WMM_NUM_AC)) {
<------><------><------><------>if (++target->ac_tx_count[ac] >=
<------><------><------><------><------>TX_RESUME_BUNDLE_THRESHOLD) {
<------><------><------><------><------>target->ac_tx_count[ac] = 0;
<------><------><------><------><------>target->tx_bndl_mask |= (1 << ac);
<------><------><------><------>}
<------><------><------>}
<------><------>} else {
<------><------><------>/* tx bundling will reset the counter */
<------><------><------>if (ac < WMM_NUM_AC)
<------><------><------><------>target->ac_tx_count[ac] = 0;
<------><------>}
<------>}
<------>endpoint->tx_proc_cnt = 0;
<------>spin_unlock_bh(&target->tx_lock);
}
static bool ath6kl_htc_tx_try(struct htc_target *target,
<------><------><------> struct htc_endpoint *endpoint,
<------><------><------> struct htc_packet *tx_pkt)
{
<------>struct htc_ep_callbacks ep_cb;
<------>int txq_depth;
<------>bool overflow = false;
<------>ep_cb = endpoint->ep_cb;
<------>spin_lock_bh(&target->tx_lock);
<------>txq_depth = get_queue_depth(&endpoint->txq);
<------>spin_unlock_bh(&target->tx_lock);
<------>if (txq_depth >= endpoint->max_txq_depth)
<------><------>overflow = true;
<------>if (overflow)
<------><------>ath6kl_dbg(ATH6KL_DBG_HTC,
<------><------><------> "htc tx overflow ep %d depth %d max %d\n",
<------><------><------> endpoint->eid, txq_depth,
<------><------><------> endpoint->max_txq_depth);
<------>if (overflow && ep_cb.tx_full) {
<------><------>if (ep_cb.tx_full(endpoint->target, tx_pkt) ==
<------><------> HTC_SEND_FULL_DROP) {
<------><------><------>endpoint->ep_st.tx_dropped += 1;
<------><------><------>return false;
<------><------>}
<------>}
<------>spin_lock_bh(&target->tx_lock);
<------>list_add_tail(&tx_pkt->list, &endpoint->txq);
<------>spin_unlock_bh(&target->tx_lock);
<------>ath6kl_htc_tx_from_queue(target, endpoint);
<------>return true;
}
static void htc_chk_ep_txq(struct htc_target *target)
{
<------>struct htc_endpoint *endpoint;
<------>struct htc_endpoint_credit_dist *cred_dist;
<------>/*
<------> * Run through the credit distribution list to see if there are
<------> * packets queued. NOTE: no locks need to be taken since the
<------> * distribution list is not dynamic (cannot be re-ordered) and we
<------> * are not modifying any state.
<------> */
<------>list_for_each_entry(cred_dist, &target->cred_dist_list, list) {
<------><------>endpoint = cred_dist->htc_ep;
<------><------>spin_lock_bh(&target->tx_lock);
<------><------>if (!list_empty(&endpoint->txq)) {
<------><------><------>ath6kl_dbg(ATH6KL_DBG_HTC,
<------><------><------><------> "htc creds ep %d credits %d pkts %d\n",
<------><------><------><------> cred_dist->endpoint,
<------><------><------><------> endpoint->cred_dist.credits,
<------><------><------><------> get_queue_depth(&endpoint->txq));
<------><------><------>spin_unlock_bh(&target->tx_lock);
<------><------><------>/*
<------><------><------> * Try to start the stalled queue, this list is
<------><------><------> * ordered by priority. If there are credits
<------><------><------> * available the highest priority queue will get a
<------><------><------> * chance to reclaim credits from lower priority
<------><------><------> * ones.
<------><------><------> */
<------><------><------>ath6kl_htc_tx_from_queue(target, endpoint);
<------><------><------>spin_lock_bh(&target->tx_lock);
<------><------>}
<------><------>spin_unlock_bh(&target->tx_lock);
<------>}
}
static int htc_setup_tx_complete(struct htc_target *target)
{
<------>struct htc_packet *send_pkt = NULL;
<------>int status;
<------>send_pkt = htc_get_control_buf(target, true);
<------>if (!send_pkt)
<------><------>return -ENOMEM;
<------>if (target->htc_tgt_ver >= HTC_VERSION_2P1) {
<------><------>struct htc_setup_comp_ext_msg *setup_comp_ext;
<------><------>u32 flags = 0;
<------><------>setup_comp_ext =
<------><------> (struct htc_setup_comp_ext_msg *)send_pkt->buf;
<------><------>memset(setup_comp_ext, 0, sizeof(*setup_comp_ext));
<------><------>setup_comp_ext->msg_id =
<------><------><------>cpu_to_le16(HTC_MSG_SETUP_COMPLETE_EX_ID);
<------><------>if (target->msg_per_bndl_max > 0) {
<------><------><------>/* Indicate HTC bundling to the target */
<------><------><------>flags |= HTC_SETUP_COMP_FLG_RX_BNDL_EN;
<------><------><------>setup_comp_ext->msg_per_rxbndl =
<------><------><------><------><------><------>target->msg_per_bndl_max;
<------><------>}
<------><------>memcpy(&setup_comp_ext->flags, &flags,
<------><------> sizeof(setup_comp_ext->flags));
<------><------>set_htc_pkt_info(send_pkt, NULL, (u8 *) setup_comp_ext,
<------><------><------><------> sizeof(struct htc_setup_comp_ext_msg),
<------><------><------><------> ENDPOINT_0, HTC_SERVICE_TX_PACKET_TAG);
<------>} else {
<------><------>struct htc_setup_comp_msg *setup_comp;
<------><------>setup_comp = (struct htc_setup_comp_msg *)send_pkt->buf;
<------><------>memset(setup_comp, 0, sizeof(struct htc_setup_comp_msg));
<------><------>setup_comp->msg_id = cpu_to_le16(HTC_MSG_SETUP_COMPLETE_ID);
<------><------>set_htc_pkt_info(send_pkt, NULL, (u8 *) setup_comp,
<------><------><------><------> sizeof(struct htc_setup_comp_msg),
<------><------><------><------> ENDPOINT_0, HTC_SERVICE_TX_PACKET_TAG);
<------>}
<------>/* we want synchronous operation */
<------>send_pkt->completion = NULL;
<------>ath6kl_htc_tx_prep_pkt(send_pkt, 0, 0, 0);
<------>status = ath6kl_htc_tx_issue(target, send_pkt);
<------>htc_reclaim_txctrl_buf(target, send_pkt);
<------>return status;
}
static void ath6kl_htc_set_credit_dist(struct htc_target *target,
<------><------><------><------>struct ath6kl_htc_credit_info *credit_info,
<------><------><------><------>u16 srvc_pri_order[], int list_len)
{
<------>struct htc_endpoint *endpoint;
<------>int i, ep;
<------>target->credit_info = credit_info;
<------>list_add_tail(&target->endpoint[ENDPOINT_0].cred_dist.list,
<------><------> &target->cred_dist_list);
<------>for (i = 0; i < list_len; i++) {
<------><------>for (ep = ENDPOINT_1; ep < ENDPOINT_MAX; ep++) {
<------><------><------>endpoint = &target->endpoint[ep];
<------><------><------>if (endpoint->svc_id == srvc_pri_order[i]) {
<------><------><------><------>list_add_tail(&endpoint->cred_dist.list,
<------><------><------><------><------> &target->cred_dist_list);
<------><------><------><------>break;
<------><------><------>}
<------><------>}
<------><------>if (ep >= ENDPOINT_MAX) {
<------><------><------>WARN_ON(1);
<------><------><------>return;
<------><------>}
<------>}
}
static int ath6kl_htc_mbox_tx(struct htc_target *target,
<------><------><------> struct htc_packet *packet)
{
<------>struct htc_endpoint *endpoint;
<------>struct list_head queue;
<------>ath6kl_dbg(ATH6KL_DBG_HTC,
<------><------> "htc tx ep id %d buf 0x%p len %d\n",
<------><------> packet->endpoint, packet->buf, packet->act_len);
<------>if (packet->endpoint >= ENDPOINT_MAX) {
<------><------>WARN_ON(1);
<------><------>return -EINVAL;
<------>}
<------>endpoint = &target->endpoint[packet->endpoint];
<------>if (!ath6kl_htc_tx_try(target, endpoint, packet)) {
<------><------>packet->status = (target->htc_flags & HTC_OP_STATE_STOPPING) ?
<------><------><------><------> -ECANCELED : -ENOSPC;
<------><------>INIT_LIST_HEAD(&queue);
<------><------>list_add(&packet->list, &queue);
<------><------>htc_tx_complete(endpoint, &queue);
<------>}
<------>return 0;
}
/* flush endpoint TX queue */
static void ath6kl_htc_mbox_flush_txep(struct htc_target *target,
<------><------><------> enum htc_endpoint_id eid, u16 tag)
{
<------>struct htc_packet *packet, *tmp_pkt;
<------>struct list_head discard_q, container;
<------>struct htc_endpoint *endpoint = &target->endpoint[eid];
<------>if (!endpoint->svc_id) {
<------><------>WARN_ON(1);
<------><------>return;
<------>}
<------>/* initialize the discard queue */
<------>INIT_LIST_HEAD(&discard_q);
<------>spin_lock_bh(&target->tx_lock);
<------>list_for_each_entry_safe(packet, tmp_pkt, &endpoint->txq, list) {
<------><------>if ((tag == HTC_TX_PACKET_TAG_ALL) ||
<------><------> (tag == packet->info.tx.tag))
<------><------><------>list_move_tail(&packet->list, &discard_q);
<------>}
<------>spin_unlock_bh(&target->tx_lock);
<------>list_for_each_entry_safe(packet, tmp_pkt, &discard_q, list) {
<------><------>packet->status = -ECANCELED;
<------><------>list_del(&packet->list);
<------><------>ath6kl_dbg(ATH6KL_DBG_HTC,
<------><------><------> "htc tx flushing pkt 0x%p len %d ep %d tag 0x%x\n",
<------><------><------> packet, packet->act_len,
<------><------><------> packet->endpoint, packet->info.tx.tag);
<------><------>INIT_LIST_HEAD(&container);
<------><------>list_add_tail(&packet->list, &container);
<------><------>htc_tx_complete(endpoint, &container);
<------>}
}
static void ath6kl_htc_flush_txep_all(struct htc_target *target)
{
<------>struct htc_endpoint *endpoint;
<------>int i;
<------>dump_cred_dist_stats(target);
<------>for (i = ENDPOINT_0; i < ENDPOINT_MAX; i++) {
<------><------>endpoint = &target->endpoint[i];
<------><------>if (endpoint->svc_id == 0)
<------><------><------>/* not in use.. */
<------><------><------>continue;
<------><------>ath6kl_htc_mbox_flush_txep(target, i, HTC_TX_PACKET_TAG_ALL);
<------>}
}
static void ath6kl_htc_mbox_activity_changed(struct htc_target *target,
<------><------><------><------><------> enum htc_endpoint_id eid,
<------><------><------><------><------> bool active)
{
<------>struct htc_endpoint *endpoint = &target->endpoint[eid];
<------>bool dist = false;
<------>if (endpoint->svc_id == 0) {
<------><------>WARN_ON(1);
<------><------>return;
<------>}
<------>spin_lock_bh(&target->tx_lock);
<------>if (active) {
<------><------>if (!(endpoint->cred_dist.dist_flags & HTC_EP_ACTIVE)) {
<------><------><------>endpoint->cred_dist.dist_flags |= HTC_EP_ACTIVE;
<------><------><------>dist = true;
<------><------>}
<------>} else {
<------><------>if (endpoint->cred_dist.dist_flags & HTC_EP_ACTIVE) {
<------><------><------>endpoint->cred_dist.dist_flags &= ~HTC_EP_ACTIVE;
<------><------><------>dist = true;
<------><------>}
<------>}
<------>if (dist) {
<------><------>endpoint->cred_dist.txq_depth =
<------><------><------>get_queue_depth(&endpoint->txq);
<------><------>ath6kl_dbg(ATH6KL_DBG_HTC,
<------><------><------> "htc tx activity ctxt 0x%p dist 0x%p\n",
<------><------><------> target->credit_info, &target->cred_dist_list);
<------><------>ath6kl_credit_distribute(target->credit_info,
<------><------><------><------><------> &target->cred_dist_list,
<------><------><------><------><------> HTC_CREDIT_DIST_ACTIVITY_CHANGE);
<------>}
<------>spin_unlock_bh(&target->tx_lock);
<------>if (dist && !active)
<------><------>htc_chk_ep_txq(target);
}
/* HTC Rx */
static inline void ath6kl_htc_rx_update_stats(struct htc_endpoint *endpoint,
<------><------><------><------><------> int n_look_ahds)
{
<------>endpoint->ep_st.rx_pkts++;
<------>if (n_look_ahds == 1)
<------><------>endpoint->ep_st.rx_lkahds++;
<------>else if (n_look_ahds > 1)
<------><------>endpoint->ep_st.rx_bundle_lkahd++;
}
static inline bool htc_valid_rx_frame_len(struct htc_target *target,
<------><------><------><------><------> enum htc_endpoint_id eid, int len)
{
<------>return (eid == target->dev->ar->ctrl_ep) ?
<------><------>len <= ATH6KL_BUFFER_SIZE : len <= ATH6KL_AMSDU_BUFFER_SIZE;
}
static int htc_add_rxbuf(struct htc_target *target, struct htc_packet *packet)
{
<------>struct list_head queue;
<------>INIT_LIST_HEAD(&queue);
<------>list_add_tail(&packet->list, &queue);
<------>return ath6kl_htc_mbox_add_rxbuf_multiple(target, &queue);
}
static void htc_reclaim_rxbuf(struct htc_target *target,
<------><------><------> struct htc_packet *packet,
<------><------><------> struct htc_endpoint *ep)
{
<------>if (packet->info.rx.rx_flags & HTC_RX_PKT_NO_RECYCLE) {
<------><------>htc_rxpkt_reset(packet);
<------><------>packet->status = -ECANCELED;
<------><------>ep->ep_cb.rx(ep->target, packet);
<------>} else {
<------><------>htc_rxpkt_reset(packet);
<------><------>htc_add_rxbuf((void *)(target), packet);
<------>}
}
static void reclaim_rx_ctrl_buf(struct htc_target *target,
<------><------><------><------>struct htc_packet *packet)
{
<------>spin_lock_bh(&target->htc_lock);
<------>list_add_tail(&packet->list, &target->free_ctrl_rxbuf);
<------>spin_unlock_bh(&target->htc_lock);
}
static int ath6kl_htc_rx_packet(struct htc_target *target,
<------><------><------><------>struct htc_packet *packet,
<------><------><------><------>u32 rx_len)
{
<------>struct ath6kl_device *dev = target->dev;
<------>u32 padded_len;
<------>int status;
<------>padded_len = CALC_TXRX_PADDED_LEN(target, rx_len);
<------>if (padded_len > packet->buf_len) {
<------><------>ath6kl_err("not enough receive space for packet - padlen %d recvlen %d bufferlen %d\n",
<------><------><------> padded_len, rx_len, packet->buf_len);
<------><------>return -ENOMEM;
<------>}
<------>ath6kl_dbg(ATH6KL_DBG_HTC,
<------><------> "htc rx 0x%p hdr 0x%x len %d mbox 0x%x\n",
<------><------> packet, packet->info.rx.exp_hdr,
<------><------> padded_len, dev->ar->mbox_info.htc_addr);
<------>status = hif_read_write_sync(dev->ar,
<------><------><------><------> dev->ar->mbox_info.htc_addr,
<------><------><------><------> packet->buf, padded_len,
<------><------><------><------> HIF_RD_SYNC_BLOCK_FIX);
<------>packet->status = status;
<------>return status;
}
/*
* optimization for recv packets, we can indicate a
* "hint" that there are more single-packets to fetch
* on this endpoint.
*/
static void ath6kl_htc_rx_set_indicate(u32 lk_ahd,
<------><------><------><------> struct htc_endpoint *endpoint,
<------><------><------><------> struct htc_packet *packet)
{
<------>struct htc_frame_hdr *htc_hdr = (struct htc_frame_hdr *)&lk_ahd;
<------>if (htc_hdr->eid == packet->endpoint) {
<------><------>if (!list_empty(&endpoint->rx_bufq))
<------><------><------>packet->info.rx.indicat_flags |=
<------><------><------><------><------>HTC_RX_FLAGS_INDICATE_MORE_PKTS;
<------>}
}
static void ath6kl_htc_rx_chk_water_mark(struct htc_endpoint *endpoint)
{
<------>struct htc_ep_callbacks ep_cb = endpoint->ep_cb;
<------>if (ep_cb.rx_refill_thresh > 0) {
<------><------>spin_lock_bh(&endpoint->target->rx_lock);
<------><------>if (get_queue_depth(&endpoint->rx_bufq)
<------><------> < ep_cb.rx_refill_thresh) {
<------><------><------>spin_unlock_bh(&endpoint->target->rx_lock);
<------><------><------>ep_cb.rx_refill(endpoint->target, endpoint->eid);
<------><------><------>return;
<------><------>}
<------><------>spin_unlock_bh(&endpoint->target->rx_lock);
<------>}
}
/* This function is called with rx_lock held */
static int ath6kl_htc_rx_setup(struct htc_target *target,
<------><------><------> struct htc_endpoint *ep,
<------><------><------> u32 *lk_ahds, struct list_head *queue, int n_msg)
{
<------>struct htc_packet *packet;
<------>/* FIXME: type of lk_ahds can't be right */
<------>struct htc_frame_hdr *htc_hdr = (struct htc_frame_hdr *)lk_ahds;
<------>struct htc_ep_callbacks ep_cb;
<------>int status = 0, j, full_len;
<------>bool no_recycle;
<------>full_len = CALC_TXRX_PADDED_LEN(target,
<------><------><------><------><------>le16_to_cpu(htc_hdr->payld_len) +
<------><------><------><------><------>sizeof(*htc_hdr));
<------>if (!htc_valid_rx_frame_len(target, ep->eid, full_len)) {
<------><------>ath6kl_warn("Rx buffer requested with invalid length htc_hdr:eid %d, flags 0x%x, len %d\n",
<------><------><------> htc_hdr->eid, htc_hdr->flags,
<------><------><------> le16_to_cpu(htc_hdr->payld_len));
<------><------>return -EINVAL;
<------>}
<------>ep_cb = ep->ep_cb;
<------>for (j = 0; j < n_msg; j++) {
<------><------>/*
<------><------> * Reset flag, any packets allocated using the
<------><------> * rx_alloc() API cannot be recycled on
<------><------> * cleanup,they must be explicitly returned.
<------><------> */
<------><------>no_recycle = false;
<------><------>if (ep_cb.rx_allocthresh &&
<------><------> (full_len > ep_cb.rx_alloc_thresh)) {
<------><------><------>ep->ep_st.rx_alloc_thresh_hit += 1;
<------><------><------>ep->ep_st.rxalloc_thresh_byte +=
<------><------><------><------>le16_to_cpu(htc_hdr->payld_len);
<------><------><------>spin_unlock_bh(&target->rx_lock);
<------><------><------>no_recycle = true;
<------><------><------>packet = ep_cb.rx_allocthresh(ep->target, ep->eid,
<------><------><------><------><------><------> full_len);
<------><------><------>spin_lock_bh(&target->rx_lock);
<------><------>} else {
<------><------><------>/* refill handler is being used */
<------><------><------>if (list_empty(&ep->rx_bufq)) {
<------><------><------><------>if (ep_cb.rx_refill) {
<------><------><------><------><------>spin_unlock_bh(&target->rx_lock);
<------><------><------><------><------>ep_cb.rx_refill(ep->target, ep->eid);
<------><------><------><------><------>spin_lock_bh(&target->rx_lock);
<------><------><------><------>}
<------><------><------>}
<------><------><------>if (list_empty(&ep->rx_bufq)) {
<------><------><------><------>packet = NULL;
<------><------><------>} else {
<------><------><------><------>packet = list_first_entry(&ep->rx_bufq,
<------><------><------><------><------><------>struct htc_packet, list);
<------><------><------><------>list_del(&packet->list);
<------><------><------>}
<------><------>}
<------><------>if (!packet) {
<------><------><------>target->rx_st_flags |= HTC_RECV_WAIT_BUFFERS;
<------><------><------>target->ep_waiting = ep->eid;
<------><------><------>return -ENOSPC;
<------><------>}
<------><------>/* clear flags */
<------><------>packet->info.rx.rx_flags = 0;
<------><------>packet->info.rx.indicat_flags = 0;
<------><------>packet->status = 0;
<------><------>if (no_recycle)
<------><------><------>/*
<------><------><------> * flag that these packets cannot be
<------><------><------> * recycled, they have to be returned to
<------><------><------> * the user
<------><------><------> */
<------><------><------>packet->info.rx.rx_flags |= HTC_RX_PKT_NO_RECYCLE;
<------><------>/* Caller needs to free this upon any failure */
<------><------>list_add_tail(&packet->list, queue);
<------><------>if (target->htc_flags & HTC_OP_STATE_STOPPING) {
<------><------><------>status = -ECANCELED;
<------><------><------>break;
<------><------>}
<------><------>if (j) {
<------><------><------>packet->info.rx.rx_flags |= HTC_RX_PKT_REFRESH_HDR;
<------><------><------>packet->info.rx.exp_hdr = 0xFFFFFFFF;
<------><------>} else
<------><------><------>/* set expected look ahead */
<------><------><------>packet->info.rx.exp_hdr = *lk_ahds;
<------><------>packet->act_len = le16_to_cpu(htc_hdr->payld_len) +
<------><------><------>HTC_HDR_LENGTH;
<------>}
<------>return status;
}
static int ath6kl_htc_rx_alloc(struct htc_target *target,
<------><------><------> u32 lk_ahds[], int msg,
<------><------><------> struct htc_endpoint *endpoint,
<------><------><------> struct list_head *queue)
{
<------>int status = 0;
<------>struct htc_packet *packet, *tmp_pkt;
<------>struct htc_frame_hdr *htc_hdr;
<------>int i, n_msg;
<------>spin_lock_bh(&target->rx_lock);
<------>for (i = 0; i < msg; i++) {
<------><------>htc_hdr = (struct htc_frame_hdr *)&lk_ahds[i];
<------><------>if (htc_hdr->eid >= ENDPOINT_MAX) {
<------><------><------>ath6kl_err("invalid ep in look-ahead: %d\n",
<------><------><------><------> htc_hdr->eid);
<------><------><------>status = -ENOMEM;
<------><------><------>break;
<------><------>}
<------><------>if (htc_hdr->eid != endpoint->eid) {
<------><------><------>ath6kl_err("invalid ep in look-ahead: %d should be : %d (index:%d)\n",
<------><------><------><------> htc_hdr->eid, endpoint->eid, i);
<------><------><------>status = -ENOMEM;
<------><------><------>break;
<------><------>}
<------><------>if (le16_to_cpu(htc_hdr->payld_len) > HTC_MAX_PAYLOAD_LENGTH) {
<------><------><------>ath6kl_err("payload len %d exceeds max htc : %d !\n",
<------><------><------><------> htc_hdr->payld_len,
<------><------><------><------> (u32) HTC_MAX_PAYLOAD_LENGTH);
<------><------><------>status = -ENOMEM;
<------><------><------>break;
<------><------>}
<------><------>if (endpoint->svc_id == 0) {
<------><------><------>ath6kl_err("ep %d is not connected !\n", htc_hdr->eid);
<------><------><------>status = -ENOMEM;
<------><------><------>break;
<------><------>}
<------><------>if (htc_hdr->flags & HTC_FLG_RX_BNDL_CNT) {
<------><------><------>/*
<------><------><------> * HTC header indicates that every packet to follow
<------><------><------> * has the same padded length so that it can be
<------><------><------> * optimally fetched as a full bundle.
<------><------><------> */
<------><------><------>n_msg = (htc_hdr->flags & HTC_FLG_RX_BNDL_CNT) >>
<------><------><------><------>HTC_FLG_RX_BNDL_CNT_S;
<------><------><------>/* the count doesn't include the starter frame */
<------><------><------>n_msg++;
<------><------><------>if (n_msg > target->msg_per_bndl_max) {
<------><------><------><------>status = -ENOMEM;
<------><------><------><------>break;
<------><------><------>}
<------><------><------>endpoint->ep_st.rx_bundle_from_hdr += 1;
<------><------><------>ath6kl_dbg(ATH6KL_DBG_HTC,
<------><------><------><------> "htc rx bundle pkts %d\n",
<------><------><------><------> n_msg);
<------><------>} else
<------><------><------>/* HTC header only indicates 1 message to fetch */
<------><------><------>n_msg = 1;
<------><------>/* Setup packet buffers for each message */
<------><------>status = ath6kl_htc_rx_setup(target, endpoint, &lk_ahds[i],
<------><------><------><------><------> queue, n_msg);
<------><------>/*
<------><------> * This is due to unavailabilty of buffers to rx entire data.
<------><------> * Return no error so that free buffers from queue can be used
<------><------> * to receive partial data.
<------><------> */
<------><------>if (status == -ENOSPC) {
<------><------><------>spin_unlock_bh(&target->rx_lock);
<------><------><------>return 0;
<------><------>}
<------><------>if (status)
<------><------><------>break;
<------>}
<------>spin_unlock_bh(&target->rx_lock);
<------>if (status) {
<------><------>list_for_each_entry_safe(packet, tmp_pkt, queue, list) {
<------><------><------>list_del(&packet->list);
<------><------><------>htc_reclaim_rxbuf(target, packet,
<------><------><------><------><------> &target->endpoint[packet->endpoint]);
<------><------>}
<------>}
<------>return status;
}
static void htc_ctrl_rx(struct htc_target *context, struct htc_packet *packets)
{
<------>if (packets->endpoint != ENDPOINT_0) {
<------><------>WARN_ON(1);
<------><------>return;
<------>}
<------>if (packets->status == -ECANCELED) {
<------><------>reclaim_rx_ctrl_buf(context, packets);
<------><------>return;
<------>}
<------>if (packets->act_len > 0) {
<------><------>ath6kl_err("htc_ctrl_rx, got message with len:%zu\n",
<------><------><------> packets->act_len + HTC_HDR_LENGTH);
<------><------>ath6kl_dbg_dump(ATH6KL_DBG_HTC,
<------><------><------><------>"htc rx unexpected endpoint 0 message", "",
<------><------><------><------>packets->buf - HTC_HDR_LENGTH,
<------><------><------><------>packets->act_len + HTC_HDR_LENGTH);
<------>}
<------>htc_reclaim_rxbuf(context, packets, &context->endpoint[0]);
}
static void htc_proc_cred_rpt(struct htc_target *target,
<------><------><------> struct htc_credit_report *rpt,
<------><------><------> int n_entries,
<------><------><------> enum htc_endpoint_id from_ep)
{
<------>struct htc_endpoint *endpoint;
<------>int tot_credits = 0, i;
<------>bool dist = false;
<------>spin_lock_bh(&target->tx_lock);
<------>for (i = 0; i < n_entries; i++, rpt++) {
<------><------>if (rpt->eid >= ENDPOINT_MAX) {
<------><------><------>WARN_ON(1);
<------><------><------>spin_unlock_bh(&target->tx_lock);
<------><------><------>return;
<------><------>}
<------><------>endpoint = &target->endpoint[rpt->eid];
<------><------>ath6kl_dbg(ATH6KL_DBG_CREDIT,
<------><------><------> "credit report ep %d credits %d\n",
<------><------><------> rpt->eid, rpt->credits);
<------><------>endpoint->ep_st.tx_cred_rpt += 1;
<------><------>endpoint->ep_st.cred_retnd += rpt->credits;
<------><------>if (from_ep == rpt->eid) {
<------><------><------>/*
<------><------><------> * This credit report arrived on the same endpoint
<------><------><------> * indicating it arrived in an RX packet.
<------><------><------> */
<------><------><------>endpoint->ep_st.cred_from_rx += rpt->credits;
<------><------><------>endpoint->ep_st.cred_rpt_from_rx += 1;
<------><------>} else if (from_ep == ENDPOINT_0) {
<------><------><------>/* credit arrived on endpoint 0 as a NULL message */
<------><------><------>endpoint->ep_st.cred_from_ep0 += rpt->credits;
<------><------><------>endpoint->ep_st.cred_rpt_ep0 += 1;
<------><------>} else {
<------><------><------>endpoint->ep_st.cred_from_other += rpt->credits;
<------><------><------>endpoint->ep_st.cred_rpt_from_other += 1;
<------><------>}
<------><------>if (rpt->eid == ENDPOINT_0)
<------><------><------>/* always give endpoint 0 credits back */
<------><------><------>endpoint->cred_dist.credits += rpt->credits;
<------><------>else {
<------><------><------>endpoint->cred_dist.cred_to_dist += rpt->credits;
<------><------><------>dist = true;
<------><------>}
<------><------>/*
<------><------> * Refresh tx depth for distribution function that will
<------><------> * recover these credits NOTE: this is only valid when
<------><------> * there are credits to recover!
<------><------> */
<------><------>endpoint->cred_dist.txq_depth =
<------><------><------>get_queue_depth(&endpoint->txq);
<------><------>tot_credits += rpt->credits;
<------>}
<------>if (dist) {
<------><------>/*
<------><------> * This was a credit return based on a completed send
<------><------> * operations note, this is done with the lock held
<------><------> */
<------><------>ath6kl_credit_distribute(target->credit_info,
<------><------><------><------><------> &target->cred_dist_list,
<------><------><------><------><------> HTC_CREDIT_DIST_SEND_COMPLETE);
<------>}
<------>spin_unlock_bh(&target->tx_lock);
<------>if (tot_credits)
<------><------>htc_chk_ep_txq(target);
}
static int htc_parse_trailer(struct htc_target *target,
<------><------><------> struct htc_record_hdr *record,
<------><------><------> u8 *record_buf, u32 *next_lk_ahds,
<------><------><------> enum htc_endpoint_id endpoint,
<------><------><------> int *n_lk_ahds)
{
<------>struct htc_bundle_lkahd_rpt *bundle_lkahd_rpt;
<------>struct htc_lookahead_report *lk_ahd;
<------>int len;
<------>switch (record->rec_id) {
<------>case HTC_RECORD_CREDITS:
<------><------>len = record->len / sizeof(struct htc_credit_report);
<------><------>if (!len) {
<------><------><------>WARN_ON(1);
<------><------><------>return -EINVAL;
<------><------>}
<------><------>htc_proc_cred_rpt(target,
<------><------><------><------> (struct htc_credit_report *) record_buf,
<------><------><------><------> len, endpoint);
<------><------>break;
<------>case HTC_RECORD_LOOKAHEAD:
<------><------>len = record->len / sizeof(*lk_ahd);
<------><------>if (!len) {
<------><------><------>WARN_ON(1);
<------><------><------>return -EINVAL;
<------><------>}
<------><------>lk_ahd = (struct htc_lookahead_report *) record_buf;
<------><------>if ((lk_ahd->pre_valid == ((~lk_ahd->post_valid) & 0xFF)) &&
<------><------> next_lk_ahds) {
<------><------><------>ath6kl_dbg(ATH6KL_DBG_HTC,
<------><------><------><------> "htc rx lk_ahd found pre_valid 0x%x post_valid 0x%x\n",
<------><------><------><------> lk_ahd->pre_valid, lk_ahd->post_valid);
<------><------><------>/* look ahead bytes are valid, copy them over */
<------><------><------>memcpy((u8 *)&next_lk_ahds[0], lk_ahd->lk_ahd, 4);
<------><------><------>ath6kl_dbg_dump(ATH6KL_DBG_HTC,
<------><------><------><------><------>"htc rx next look ahead",
<------><------><------><------><------>"", next_lk_ahds, 4);
<------><------><------>*n_lk_ahds = 1;
<------><------>}
<------><------>break;
<------>case HTC_RECORD_LOOKAHEAD_BUNDLE:
<------><------>len = record->len / sizeof(*bundle_lkahd_rpt);
<------><------>if (!len || (len > HTC_HOST_MAX_MSG_PER_BUNDLE)) {
<------><------><------>WARN_ON(1);
<------><------><------>return -EINVAL;
<------><------>}
<------><------>if (next_lk_ahds) {
<------><------><------>int i;
<------><------><------>bundle_lkahd_rpt =
<------><------><------><------>(struct htc_bundle_lkahd_rpt *) record_buf;
<------><------><------>ath6kl_dbg_dump(ATH6KL_DBG_HTC, "htc rx bundle lk_ahd",
<------><------><------><------><------>"", record_buf, record->len);
<------><------><------>for (i = 0; i < len; i++) {
<------><------><------><------>memcpy((u8 *)&next_lk_ahds[i],
<------><------><------><------> bundle_lkahd_rpt->lk_ahd, 4);
<------><------><------><------>bundle_lkahd_rpt++;
<------><------><------>}
<------><------><------>*n_lk_ahds = i;
<------><------>}
<------><------>break;
<------>default:
<------><------>ath6kl_err("unhandled record: id:%d len:%d\n",
<------><------><------> record->rec_id, record->len);
<------><------>break;
<------>}
<------>return 0;
}
static int htc_proc_trailer(struct htc_target *target,
<------><------><------> u8 *buf, int len, u32 *next_lk_ahds,
<------><------><------> int *n_lk_ahds, enum htc_endpoint_id endpoint)
{
<------>struct htc_record_hdr *record;
<------>int orig_len;
<------>int status;
<------>u8 *record_buf;
<------>u8 *orig_buf;
<------>ath6kl_dbg(ATH6KL_DBG_HTC, "htc rx trailer len %d\n", len);
<------>ath6kl_dbg_dump(ATH6KL_DBG_HTC, NULL, "", buf, len);
<------>orig_buf = buf;
<------>orig_len = len;
<------>status = 0;
<------>while (len > 0) {
<------><------>if (len < sizeof(struct htc_record_hdr)) {
<------><------><------>status = -ENOMEM;
<------><------><------>break;
<------><------>}
<------><------>/* these are byte aligned structs */
<------><------>record = (struct htc_record_hdr *) buf;
<------><------>len -= sizeof(struct htc_record_hdr);
<------><------>buf += sizeof(struct htc_record_hdr);
<------><------>if (record->len > len) {
<------><------><------>ath6kl_err("invalid record len: %d (id:%d) buf has: %d bytes left\n",
<------><------><------><------> record->len, record->rec_id, len);
<------><------><------>status = -ENOMEM;
<------><------><------>break;
<------><------>}
<------><------>record_buf = buf;
<------><------>status = htc_parse_trailer(target, record, record_buf,
<------><------><------><------><------> next_lk_ahds, endpoint, n_lk_ahds);
<------><------>if (status)
<------><------><------>break;
<------><------>/* advance buffer past this record for next time around */
<------><------>buf += record->len;
<------><------>len -= record->len;
<------>}
<------>if (status)
<------><------>ath6kl_dbg_dump(ATH6KL_DBG_HTC, "htc rx bad trailer",
<------><------><------><------>"", orig_buf, orig_len);
<------>return status;
}
static int ath6kl_htc_rx_process_hdr(struct htc_target *target,
<------><------><------><------> struct htc_packet *packet,
<------><------><------><------> u32 *next_lkahds, int *n_lkahds)
{
<------>int status = 0;
<------>u16 payload_len;
<------>u32 lk_ahd;
<------>struct htc_frame_hdr *htc_hdr = (struct htc_frame_hdr *)packet->buf;
<------>if (n_lkahds != NULL)
<------><------>*n_lkahds = 0;
<------>/*
<------> * NOTE: we cannot assume the alignment of buf, so we use the safe
<------> * macros to retrieve 16 bit fields.
<------> */
<------>payload_len = le16_to_cpu(get_unaligned(&htc_hdr->payld_len));
<------>memcpy((u8 *)&lk_ahd, packet->buf, sizeof(lk_ahd));
<------>if (packet->info.rx.rx_flags & HTC_RX_PKT_REFRESH_HDR) {
<------><------>/*
<------><------> * Refresh the expected header and the actual length as it
<------><------> * was unknown when this packet was grabbed as part of the
<------><------> * bundle.
<------><------> */
<------><------>packet->info.rx.exp_hdr = lk_ahd;
<------><------>packet->act_len = payload_len + HTC_HDR_LENGTH;
<------><------>/* validate the actual header that was refreshed */
<------><------>if (packet->act_len > packet->buf_len) {
<------><------><------>ath6kl_err("refreshed hdr payload len (%d) in bundled recv is invalid (hdr: 0x%X)\n",
<------><------><------><------> payload_len, lk_ahd);
<------><------><------>/*
<------><------><------> * Limit this to max buffer just to print out some
<------><------><------> * of the buffer.
<------><------><------> */
<------><------><------>packet->act_len = min(packet->act_len, packet->buf_len);
<------><------><------>status = -ENOMEM;
<------><------><------>goto fail_rx;
<------><------>}
<------><------>if (packet->endpoint != htc_hdr->eid) {
<------><------><------>ath6kl_err("refreshed hdr ep (%d) does not match expected ep (%d)\n",
<------><------><------><------> htc_hdr->eid, packet->endpoint);
<------><------><------>status = -ENOMEM;
<------><------><------>goto fail_rx;
<------><------>}
<------>}
<------>if (lk_ahd != packet->info.rx.exp_hdr) {
<------><------>ath6kl_err("%s(): lk_ahd mismatch! (pPkt:0x%p flags:0x%X)\n",
<------><------><------> __func__, packet, packet->info.rx.rx_flags);
<------><------>ath6kl_dbg_dump(ATH6KL_DBG_HTC, "htc rx expected lk_ahd",
<------><------><------><------>"", &packet->info.rx.exp_hdr, 4);
<------><------>ath6kl_dbg_dump(ATH6KL_DBG_HTC, "htc rx current header",
<------><------><------><------>"", (u8 *)&lk_ahd, sizeof(lk_ahd));
<------><------>status = -ENOMEM;
<------><------>goto fail_rx;
<------>}
<------>if (htc_hdr->flags & HTC_FLG_RX_TRAILER) {
<------><------>if (htc_hdr->ctrl[0] < sizeof(struct htc_record_hdr) ||
<------><------> htc_hdr->ctrl[0] > payload_len) {
<------><------><------>ath6kl_err("%s(): invalid hdr (payload len should be :%d, CB[0] is:%d)\n",
<------><------><------><------> __func__, payload_len, htc_hdr->ctrl[0]);
<------><------><------>status = -ENOMEM;
<------><------><------>goto fail_rx;
<------><------>}
<------><------>if (packet->info.rx.rx_flags & HTC_RX_PKT_IGNORE_LOOKAHEAD) {
<------><------><------>next_lkahds = NULL;
<------><------><------>n_lkahds = NULL;
<------><------>}
<------><------>status = htc_proc_trailer(target, packet->buf + HTC_HDR_LENGTH
<------><------><------><------><------> + payload_len - htc_hdr->ctrl[0],
<------><------><------><------><------> htc_hdr->ctrl[0], next_lkahds,
<------><------><------><------><------> n_lkahds, packet->endpoint);
<------><------>if (status)
<------><------><------>goto fail_rx;
<------><------>packet->act_len -= htc_hdr->ctrl[0];
<------>}
<------>packet->buf += HTC_HDR_LENGTH;
<------>packet->act_len -= HTC_HDR_LENGTH;
fail_rx:
<------>if (status)
<------><------>ath6kl_dbg_dump(ATH6KL_DBG_HTC, "htc rx bad packet",
<------><------><------><------>"", packet->buf, packet->act_len);
<------>return status;
}
static void ath6kl_htc_rx_complete(struct htc_endpoint *endpoint,
<------><------><------><------> struct htc_packet *packet)
{
<------><------>ath6kl_dbg(ATH6KL_DBG_HTC,
<------><------><------> "htc rx complete ep %d packet 0x%p\n",
<------><------><------> endpoint->eid, packet);
<------><------>endpoint->ep_cb.rx(endpoint->target, packet);
}
static int ath6kl_htc_rx_bundle(struct htc_target *target,
<------><------><------><------>struct list_head *rxq,
<------><------><------><------>struct list_head *sync_compq,
<------><------><------><------>int *n_pkt_fetched, bool part_bundle)
{
<------>struct hif_scatter_req *scat_req;
<------>struct htc_packet *packet;
<------>int rem_space = target->max_rx_bndl_sz;
<------>int n_scat_pkt, status = 0, i, len;
<------>n_scat_pkt = get_queue_depth(rxq);
<------>n_scat_pkt = min(n_scat_pkt, target->msg_per_bndl_max);
<------>if ((get_queue_depth(rxq) - n_scat_pkt) > 0) {
<------><------>/*
<------><------> * We were forced to split this bundle receive operation
<------><------> * all packets in this partial bundle must have their
<------><------> * lookaheads ignored.
<------><------> */
<------><------>part_bundle = true;
<------><------>/*
<------><------> * This would only happen if the target ignored our max
<------><------> * bundle limit.
<------><------> */
<------><------>ath6kl_warn("%s(): partial bundle detected num:%d , %d\n",
<------><------><------> __func__, get_queue_depth(rxq), n_scat_pkt);
<------>}
<------>len = 0;
<------>ath6kl_dbg(ATH6KL_DBG_HTC,
<------><------> "htc rx bundle depth %d pkts %d\n",
<------><------> get_queue_depth(rxq), n_scat_pkt);
<------>scat_req = hif_scatter_req_get(target->dev->ar);
<------>if (scat_req == NULL)
<------><------>goto fail_rx_pkt;
<------>for (i = 0; i < n_scat_pkt; i++) {
<------><------>int pad_len;
<------><------>packet = list_first_entry(rxq, struct htc_packet, list);
<------><------>list_del(&packet->list);
<------><------>pad_len = CALC_TXRX_PADDED_LEN(target,
<------><------><------><------><------><------> packet->act_len);
<------><------>if ((rem_space - pad_len) < 0) {
<------><------><------>list_add(&packet->list, rxq);
<------><------><------>break;
<------><------>}
<------><------>rem_space -= pad_len;
<------><------>if (part_bundle || (i < (n_scat_pkt - 1)))
<------><------><------>/*
<------><------><------> * Packet 0..n-1 cannot be checked for look-aheads
<------><------><------> * since we are fetching a bundle the last packet
<------><------><------> * however can have it's lookahead used
<------><------><------> */
<------><------><------>packet->info.rx.rx_flags |=
<------><------><------> HTC_RX_PKT_IGNORE_LOOKAHEAD;
<------><------>/* NOTE: 1 HTC packet per scatter entry */
<------><------>scat_req->scat_list[i].buf = packet->buf;
<------><------>scat_req->scat_list[i].len = pad_len;
<------><------>packet->info.rx.rx_flags |= HTC_RX_PKT_PART_OF_BUNDLE;
<------><------>list_add_tail(&packet->list, sync_compq);
<------><------>WARN_ON(!scat_req->scat_list[i].len);
<------><------>len += scat_req->scat_list[i].len;
<------>}
<------>scat_req->len = len;
<------>scat_req->scat_entries = i;
<------>status = ath6kl_hif_submit_scat_req(target->dev, scat_req, true);
<------>if (!status)
<------><------>*n_pkt_fetched = i;
<------>/* free scatter request */
<------>hif_scatter_req_add(target->dev->ar, scat_req);
fail_rx_pkt:
<------>return status;
}
static int ath6kl_htc_rx_process_packets(struct htc_target *target,
<------><------><------><------><------> struct list_head *comp_pktq,
<------><------><------><------><------> u32 lk_ahds[],
<------><------><------><------><------> int *n_lk_ahd)
{
<------>struct htc_packet *packet, *tmp_pkt;
<------>struct htc_endpoint *ep;
<------>int status = 0;
<------>list_for_each_entry_safe(packet, tmp_pkt, comp_pktq, list) {
<------><------>ep = &target->endpoint[packet->endpoint];
<------><------>trace_ath6kl_htc_rx(packet->status, packet->endpoint,
<------><------><------><------> packet->buf, packet->act_len);
<------><------>/* process header for each of the recv packet */
<------><------>status = ath6kl_htc_rx_process_hdr(target, packet, lk_ahds,
<------><------><------><------><------><------> n_lk_ahd);
<------><------>if (status)
<------><------><------>return status;
<------><------>list_del(&packet->list);
<------><------>if (list_empty(comp_pktq)) {
<------><------><------>/*
<------><------><------> * Last packet's more packet flag is set
<------><------><------> * based on the lookahead.
<------><------><------> */
<------><------><------>if (*n_lk_ahd > 0)
<------><------><------><------>ath6kl_htc_rx_set_indicate(lk_ahds[0],
<------><------><------><------><------><------><------> ep, packet);
<------><------>} else
<------><------><------>/*
<------><------><------> * Packets in a bundle automatically have
<------><------><------> * this flag set.
<------><------><------> */
<------><------><------>packet->info.rx.indicat_flags |=
<------><------><------><------>HTC_RX_FLAGS_INDICATE_MORE_PKTS;
<------><------>ath6kl_htc_rx_update_stats(ep, *n_lk_ahd);
<------><------>if (packet->info.rx.rx_flags & HTC_RX_PKT_PART_OF_BUNDLE)
<------><------><------>ep->ep_st.rx_bundl += 1;
<------><------>ath6kl_htc_rx_complete(ep, packet);
<------>}
<------>return status;
}
static int ath6kl_htc_rx_fetch(struct htc_target *target,
<------><------><------> struct list_head *rx_pktq,
<------><------><------> struct list_head *comp_pktq)
{
<------>int fetched_pkts;
<------>bool part_bundle = false;
<------>int status = 0;
<------>struct list_head tmp_rxq;
<------>struct htc_packet *packet, *tmp_pkt;
<------>/* now go fetch the list of HTC packets */
<------>while (!list_empty(rx_pktq)) {
<------><------>fetched_pkts = 0;
<------><------>INIT_LIST_HEAD(&tmp_rxq);
<------><------>if (target->rx_bndl_enable && (get_queue_depth(rx_pktq) > 1)) {
<------><------><------>/*
<------><------><------> * There are enough packets to attempt a
<------><------><------> * bundle transfer and recv bundling is
<------><------><------> * allowed.
<------><------><------> */
<------><------><------>status = ath6kl_htc_rx_bundle(target, rx_pktq,
<------><------><------><------><------><------> &tmp_rxq,
<------><------><------><------><------><------> &fetched_pkts,
<------><------><------><------><------><------> part_bundle);
<------><------><------>if (status)
<------><------><------><------>goto fail_rx;
<------><------><------>if (!list_empty(rx_pktq))
<------><------><------><------>part_bundle = true;
<------><------><------>list_splice_tail_init(&tmp_rxq, comp_pktq);
<------><------>}
<------><------>if (!fetched_pkts) {
<------><------><------>packet = list_first_entry(rx_pktq, struct htc_packet,
<------><------><------><------><------><------> list);
<------><------><------>/* fully synchronous */
<------><------><------>packet->completion = NULL;
<------><------><------>if (!list_is_singular(rx_pktq))
<------><------><------><------>/*
<------><------><------><------> * look_aheads in all packet
<------><------><------><------> * except the last one in the
<------><------><------><------> * bundle must be ignored
<------><------><------><------> */
<------><------><------><------>packet->info.rx.rx_flags |=
<------><------><------><------><------>HTC_RX_PKT_IGNORE_LOOKAHEAD;
<------><------><------>/* go fetch the packet */
<------><------><------>status = ath6kl_htc_rx_packet(target, packet,
<------><------><------><------><------><------> packet->act_len);
<------><------><------>list_move_tail(&packet->list, &tmp_rxq);
<------><------><------>if (status)
<------><------><------><------>goto fail_rx;
<------><------><------>list_splice_tail_init(&tmp_rxq, comp_pktq);
<------><------>}
<------>}
<------>return 0;
fail_rx:
<------>/*
<------> * Cleanup any packets we allocated but didn't use to
<------> * actually fetch any packets.
<------> */
<------>list_for_each_entry_safe(packet, tmp_pkt, rx_pktq, list) {
<------><------>list_del(&packet->list);
<------><------>htc_reclaim_rxbuf(target, packet,
<------><------><------><------> &target->endpoint[packet->endpoint]);
<------>}
<------>list_for_each_entry_safe(packet, tmp_pkt, &tmp_rxq, list) {
<------><------>list_del(&packet->list);
<------><------>htc_reclaim_rxbuf(target, packet,
<------><------><------><------> &target->endpoint[packet->endpoint]);
<------>}
<------>return status;
}
int ath6kl_htc_rxmsg_pending_handler(struct htc_target *target,
<------><------><------><------> u32 msg_look_ahead, int *num_pkts)
{
<------>struct htc_packet *packets, *tmp_pkt;
<------>struct htc_endpoint *endpoint;
<------>struct list_head rx_pktq, comp_pktq;
<------>int status = 0;
<------>u32 look_aheads[HTC_HOST_MAX_MSG_PER_BUNDLE];
<------>int num_look_ahead = 1;
<------>enum htc_endpoint_id id;
<------>int n_fetched = 0;
<------>INIT_LIST_HEAD(&comp_pktq);
<------>*num_pkts = 0;
<------>/*
<------> * On first entry copy the look_aheads into our temp array for
<------> * processing
<------> */
<------>look_aheads[0] = msg_look_ahead;
<------>while (true) {
<------><------>/*
<------><------> * First lookahead sets the expected endpoint IDs for all
<------><------> * packets in a bundle.
<------><------> */
<------><------>id = ((struct htc_frame_hdr *)&look_aheads[0])->eid;
<------><------>endpoint = &target->endpoint[id];
<------><------>if (id >= ENDPOINT_MAX) {
<------><------><------>ath6kl_err("MsgPend, invalid endpoint in look-ahead: %d\n",
<------><------><------><------> id);
<------><------><------>status = -ENOMEM;
<------><------><------>break;
<------><------>}
<------><------>INIT_LIST_HEAD(&rx_pktq);
<------><------>INIT_LIST_HEAD(&comp_pktq);
<------><------>/*
<------><------> * Try to allocate as many HTC RX packets indicated by the
<------><------> * look_aheads.
<------><------> */
<------><------>status = ath6kl_htc_rx_alloc(target, look_aheads,
<------><------><------><------><------> num_look_ahead, endpoint,
<------><------><------><------><------> &rx_pktq);
<------><------>if (status)
<------><------><------>break;
<------><------>if (get_queue_depth(&rx_pktq) >= 2)
<------><------><------>/*
<------><------><------> * A recv bundle was detected, force IRQ status
<------><------><------> * re-check again
<------><------><------> */
<------><------><------>target->chk_irq_status_cnt = 1;
<------><------>n_fetched += get_queue_depth(&rx_pktq);
<------><------>num_look_ahead = 0;
<------><------>status = ath6kl_htc_rx_fetch(target, &rx_pktq, &comp_pktq);
<------><------>if (!status)
<------><------><------>ath6kl_htc_rx_chk_water_mark(endpoint);
<------><------>/* Process fetched packets */
<------><------>status = ath6kl_htc_rx_process_packets(target, &comp_pktq,
<------><------><------><------><------><------> look_aheads,
<------><------><------><------><------><------> &num_look_ahead);
<------><------>if (!num_look_ahead || status)
<------><------><------>break;
<------><------>/*
<------><------> * For SYNCH processing, if we get here, we are running
<------><------> * through the loop again due to a detected lookahead. Set
<------><------> * flag that we should re-check IRQ status registers again
<------><------> * before leaving IRQ processing, this can net better
<------><------> * performance in high throughput situations.
<------><------> */
<------><------>target->chk_irq_status_cnt = 1;
<------>}
<------>if (status) {
<------><------>if (status != -ECANCELED)
<------><------><------>ath6kl_err("failed to get pending recv messages: %d\n",
<------><------><------><------> status);
<------><------>/* cleanup any packets in sync completion queue */
<------><------>list_for_each_entry_safe(packets, tmp_pkt, &comp_pktq, list) {
<------><------><------>list_del(&packets->list);
<------><------><------>htc_reclaim_rxbuf(target, packets,
<------><------><------><------><------> &target->endpoint[packets->endpoint]);
<------><------>}
<------><------>if (target->htc_flags & HTC_OP_STATE_STOPPING) {
<------><------><------>ath6kl_warn("host is going to stop blocking receiver for htc_stop\n");
<------><------><------>ath6kl_hif_rx_control(target->dev, false);
<------><------>}
<------>}
<------>/*
<------> * Before leaving, check to see if host ran out of buffers and
<------> * needs to stop the receiver.
<------> */
<------>if (target->rx_st_flags & HTC_RECV_WAIT_BUFFERS) {
<------><------>ath6kl_warn("host has no rx buffers blocking receiver to prevent overrun\n");
<------><------>ath6kl_hif_rx_control(target->dev, false);
<------>}
<------>*num_pkts = n_fetched;
<------>return status;
}
/*
* Synchronously wait for a control message from the target,
* This function is used at initialization time ONLY. At init messages
* on ENDPOINT 0 are expected.
*/
static struct htc_packet *htc_wait_for_ctrl_msg(struct htc_target *target)
{
<------>struct htc_packet *packet = NULL;
<------>struct htc_frame_hdr *htc_hdr;
<------>u32 look_ahead;
<------>if (ath6kl_hif_poll_mboxmsg_rx(target->dev, &look_ahead,
<------><------><------><------> HTC_TARGET_RESPONSE_TIMEOUT))
<------><------>return NULL;
<------>ath6kl_dbg(ATH6KL_DBG_HTC,
<------><------> "htc rx wait ctrl look_ahead 0x%X\n", look_ahead);
<------>htc_hdr = (struct htc_frame_hdr *)&look_ahead;
<------>if (htc_hdr->eid != ENDPOINT_0)
<------><------>return NULL;
<------>packet = htc_get_control_buf(target, false);
<------>if (!packet)
<------><------>return NULL;
<------>packet->info.rx.rx_flags = 0;
<------>packet->info.rx.exp_hdr = look_ahead;
<------>packet->act_len = le16_to_cpu(htc_hdr->payld_len) + HTC_HDR_LENGTH;
<------>if (packet->act_len > packet->buf_len)
<------><------>goto fail_ctrl_rx;
<------>/* we want synchronous operation */
<------>packet->completion = NULL;
<------>/* get the message from the device, this will block */
<------>if (ath6kl_htc_rx_packet(target, packet, packet->act_len))
<------><------>goto fail_ctrl_rx;
<------>trace_ath6kl_htc_rx(packet->status, packet->endpoint,
<------><------><------> packet->buf, packet->act_len);
<------>/* process receive header */
<------>packet->status = ath6kl_htc_rx_process_hdr(target, packet, NULL, NULL);
<------>if (packet->status) {
<------><------>ath6kl_err("htc_wait_for_ctrl_msg, ath6kl_htc_rx_process_hdr failed (status = %d)\n",
<------><------><------> packet->status);
<------><------>goto fail_ctrl_rx;
<------>}
<------>return packet;
fail_ctrl_rx:
<------>if (packet != NULL) {
<------><------>htc_rxpkt_reset(packet);
<------><------>reclaim_rx_ctrl_buf(target, packet);
<------>}
<------>return NULL;
}
static int ath6kl_htc_mbox_add_rxbuf_multiple(struct htc_target *target,
<------><------><------><------> struct list_head *pkt_queue)
{
<------>struct htc_endpoint *endpoint;
<------>struct htc_packet *first_pkt;
<------>bool rx_unblock = false;
<------>int status = 0, depth;
<------>if (list_empty(pkt_queue))
<------><------>return -ENOMEM;
<------>first_pkt = list_first_entry(pkt_queue, struct htc_packet, list);
<------>if (first_pkt->endpoint >= ENDPOINT_MAX)
<------><------>return status;
<------>depth = get_queue_depth(pkt_queue);
<------>ath6kl_dbg(ATH6KL_DBG_HTC,
<------><------> "htc rx add multiple ep id %d cnt %d len %d\n",
<------><------>first_pkt->endpoint, depth, first_pkt->buf_len);
<------>endpoint = &target->endpoint[first_pkt->endpoint];
<------>if (target->htc_flags & HTC_OP_STATE_STOPPING) {
<------><------>struct htc_packet *packet, *tmp_pkt;
<------><------>/* walk through queue and mark each one canceled */
<------><------>list_for_each_entry_safe(packet, tmp_pkt, pkt_queue, list) {
<------><------><------>packet->status = -ECANCELED;
<------><------><------>list_del(&packet->list);
<------><------><------>ath6kl_htc_rx_complete(endpoint, packet);
<------><------>}
<------><------>return status;
<------>}
<------>spin_lock_bh(&target->rx_lock);
<------>list_splice_tail_init(pkt_queue, &endpoint->rx_bufq);
<------>/* check if we are blocked waiting for a new buffer */
<------>if (target->rx_st_flags & HTC_RECV_WAIT_BUFFERS) {
<------><------>if (target->ep_waiting == first_pkt->endpoint) {
<------><------><------>ath6kl_dbg(ATH6KL_DBG_HTC,
<------><------><------><------> "htc rx blocked on ep %d, unblocking\n",
<------><------><------><------> target->ep_waiting);
<------><------><------>target->rx_st_flags &= ~HTC_RECV_WAIT_BUFFERS;
<------><------><------>target->ep_waiting = ENDPOINT_MAX;
<------><------><------>rx_unblock = true;
<------><------>}
<------>}
<------>spin_unlock_bh(&target->rx_lock);
<------>if (rx_unblock && !(target->htc_flags & HTC_OP_STATE_STOPPING))
<------><------>/* TODO : implement a buffer threshold count? */
<------><------>ath6kl_hif_rx_control(target->dev, true);
<------>return status;
}
static void ath6kl_htc_mbox_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];
<------><------>if (!endpoint->svc_id)
<------><------><------>/* not in use.. */
<------><------><------>continue;
<------><------>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);
<------><------><------>/*
<------><------><------> * packets in rx_bufq of endpoint 0 have originally
<------><------><------> * been queued from target->free_ctrl_rxbuf where
<------><------><------> * packet and packet->buf_start are allocated
<------><------><------> * separately using kmalloc(). For other endpoint
<------><------><------> * rx_bufq, it is allocated as skb where packet is
<------><------><------> * skb->head. Take care of this difference while freeing
<------><------><------> * the memory.
<------><------><------> */
<------><------><------>if (packet->endpoint == ENDPOINT_0) {
<------><------><------><------>kfree(packet->buf_start);
<------><------><------><------>kfree(packet);
<------><------><------>} else {
<------><------><------><------>dev_kfree_skb(packet->pkt_cntxt);
<------><------><------>}
<------><------><------>spin_lock_bh(&target->rx_lock);
<------><------>}
<------><------>spin_unlock_bh(&target->rx_lock);
<------>}
}
static int ath6kl_htc_mbox_conn_service(struct htc_target *target,
<------><------><------> struct htc_service_connect_req *conn_req,
<------><------><------> struct htc_service_connect_resp *conn_resp)
{
<------>struct htc_packet *rx_pkt = NULL;
<------>struct htc_packet *tx_pkt = NULL;
<------>struct htc_conn_service_resp *resp_msg;
<------>struct htc_conn_service_msg *conn_msg;
<------>struct htc_endpoint *endpoint;
<------>enum htc_endpoint_id assigned_ep = ENDPOINT_MAX;
<------>unsigned int max_msg_sz = 0;
<------>int status = 0;
<------>u16 msg_id;
<------>ath6kl_dbg(ATH6KL_DBG_HTC,
<------><------> "htc connect service target 0x%p service id 0x%x\n",
<------><------> target, conn_req->svc_id);
<------>if (conn_req->svc_id == HTC_CTRL_RSVD_SVC) {
<------><------>/* special case for pseudo control service */
<------><------>assigned_ep = ENDPOINT_0;
<------><------>max_msg_sz = HTC_MAX_CTRL_MSG_LEN;
<------>} else {
<------><------>/* allocate a packet to send to the target */
<------><------>tx_pkt = htc_get_control_buf(target, true);
<------><------>if (!tx_pkt)
<------><------><------>return -ENOMEM;
<------><------>conn_msg = (struct htc_conn_service_msg *)tx_pkt->buf;
<------><------>memset(conn_msg, 0, sizeof(*conn_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);
<------><------>set_htc_pkt_info(tx_pkt, NULL, (u8 *) conn_msg,
<------><------><------><------> sizeof(*conn_msg) + conn_msg->svc_meta_len,
<------><------><------><------> ENDPOINT_0, HTC_SERVICE_TX_PACKET_TAG);
<------><------>/* we want synchronous operation */
<------><------>tx_pkt->completion = NULL;
<------><------>ath6kl_htc_tx_prep_pkt(tx_pkt, 0, 0, 0);
<------><------>status = ath6kl_htc_tx_issue(target, tx_pkt);
<------><------>if (status)
<------><------><------>goto fail_tx;
<------><------>/* wait for response */
<------><------>rx_pkt = htc_wait_for_ctrl_msg(target);
<------><------>if (!rx_pkt) {
<------><------><------>status = -ENOMEM;
<------><------><------>goto fail_tx;
<------><------>}
<------><------>resp_msg = (struct htc_conn_service_resp *)rx_pkt->buf;
<------><------>msg_id = le16_to_cpu(resp_msg->msg_id);
<------><------>if ((msg_id != HTC_MSG_CONN_SVC_RESP_ID) ||
<------><------> (rx_pkt->act_len < sizeof(*resp_msg))) {
<------><------><------>status = -ENOMEM;
<------><------><------>goto fail_tx;
<------><------>}
<------><------>conn_resp->resp_code = resp_msg->status;
<------><------>/* check response status */
<------><------>if (resp_msg->status != HTC_SERVICE_SUCCESS) {
<------><------><------>ath6kl_err("target failed service 0x%X connect request (status:%d)\n",
<------><------><------><------> resp_msg->svc_id, resp_msg->status);
<------><------><------>status = -ENOMEM;
<------><------><------>goto fail_tx;
<------><------>}
<------><------>assigned_ep = (enum htc_endpoint_id)resp_msg->eid;
<------><------>max_msg_sz = le16_to_cpu(resp_msg->max_msg_sz);
<------>}
<------>if (WARN_ON_ONCE(assigned_ep == ENDPOINT_UNUSED ||
<------><------><------> assigned_ep >= ENDPOINT_MAX || !max_msg_sz)) {
<------><------>status = -ENOMEM;
<------><------>goto fail_tx;
<------>}
<------>endpoint = &target->endpoint[assigned_ep];
<------>endpoint->eid = assigned_ep;
<------>if (endpoint->svc_id) {
<------><------>status = -ENOMEM;
<------><------>goto fail_tx;
<------>}
<------>/* return assigned endpoint to caller */
<------>conn_resp->endpoint = assigned_ep;
<------>conn_resp->len_max = max_msg_sz;
<------>/* setup the endpoint */
<------>/* this marks the endpoint in use */
<------>endpoint->svc_id = conn_req->svc_id;
<------>endpoint->max_txq_depth = conn_req->max_txq_depth;
<------>endpoint->len_max = max_msg_sz;
<------>endpoint->ep_cb = conn_req->ep_cb;
<------>endpoint->cred_dist.svc_id = conn_req->svc_id;
<------>endpoint->cred_dist.htc_ep = endpoint;
<------>endpoint->cred_dist.endpoint = assigned_ep;
<------>endpoint->cred_dist.cred_sz = target->tgt_cred_sz;
<------>switch (endpoint->svc_id) {
<------>case WMI_DATA_BK_SVC:
<------><------>endpoint->tx_drop_packet_threshold = MAX_DEF_COOKIE_NUM / 3;
<------><------>break;
<------>default:
<------><------>endpoint->tx_drop_packet_threshold = MAX_HI_COOKIE_NUM;
<------><------>break;
<------>}
<------>if (conn_req->max_rxmsg_sz) {
<------><------>/*
<------><------> * Override cred_per_msg calculation, this optimizes
<------><------> * the credit-low indications since the host will actually
<------><------> * issue smaller messages in the Send path.
<------><------> */
<------><------>if (conn_req->max_rxmsg_sz > max_msg_sz) {
<------><------><------>status = -ENOMEM;
<------><------><------>goto fail_tx;
<------><------>}
<------><------>endpoint->cred_dist.cred_per_msg =
<------><------> conn_req->max_rxmsg_sz / target->tgt_cred_sz;
<------>} else
<------><------>endpoint->cred_dist.cred_per_msg =
<------><------> max_msg_sz / target->tgt_cred_sz;
<------>if (!endpoint->cred_dist.cred_per_msg)
<------><------>endpoint->cred_dist.cred_per_msg = 1;
<------>/* save local connection flags */
<------>endpoint->conn_flags = conn_req->flags;
fail_tx:
<------>if (tx_pkt)
<------><------>htc_reclaim_txctrl_buf(target, tx_pkt);
<------>if (rx_pkt) {
<------><------>htc_rxpkt_reset(rx_pkt);
<------><------>reclaim_rx_ctrl_buf(target, rx_pkt);
<------>}
<------>return status;
}
static void reset_ep_state(struct htc_target *target)
{
<------>struct htc_endpoint *endpoint;
<------>int i;
<------>for (i = ENDPOINT_0; i < ENDPOINT_MAX; i++) {
<------><------>endpoint = &target->endpoint[i];
<------><------>memset(&endpoint->cred_dist, 0, sizeof(endpoint->cred_dist));
<------><------>endpoint->svc_id = 0;
<------><------>endpoint->len_max = 0;
<------><------>endpoint->max_txq_depth = 0;
<------><------>memset(&endpoint->ep_st, 0,
<------><------> sizeof(endpoint->ep_st));
<------><------>INIT_LIST_HEAD(&endpoint->rx_bufq);
<------><------>INIT_LIST_HEAD(&endpoint->txq);
<------><------>endpoint->target = target;
<------>}
<------>/* reset distribution list */
<------>/* FIXME: free existing entries */
<------>INIT_LIST_HEAD(&target->cred_dist_list);
}
static int ath6kl_htc_mbox_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 void htc_setup_msg_bndl(struct htc_target *target)
{
<------>/* limit what HTC can handle */
<------>target->msg_per_bndl_max = min(HTC_HOST_MAX_MSG_PER_BUNDLE,
<------><------><------><------> target->msg_per_bndl_max);
<------>if (ath6kl_hif_enable_scatter(target->dev->ar)) {
<------><------>target->msg_per_bndl_max = 0;
<------><------>return;
<------>}
<------>/* limit bundle what the device layer can handle */
<------>target->msg_per_bndl_max = min(target->max_scat_entries,
<------><------><------><------> target->msg_per_bndl_max);
<------>ath6kl_dbg(ATH6KL_DBG_BOOT,
<------><------> "htc bundling allowed msg_per_bndl_max %d\n",
<------><------> target->msg_per_bndl_max);
<------>/* Max rx bundle size is limited by the max tx bundle size */
<------>target->max_rx_bndl_sz = target->max_xfer_szper_scatreq;
<------>/* Max tx bundle size if limited by the extended mbox address range */
<------>target->max_tx_bndl_sz = min(HIF_MBOX0_EXT_WIDTH,
<------><------><------><------> target->max_xfer_szper_scatreq);
<------>ath6kl_dbg(ATH6KL_DBG_BOOT, "htc max_rx_bndl_sz %d max_tx_bndl_sz %d\n",
<------><------> target->max_rx_bndl_sz, target->max_tx_bndl_sz);
<------>if (target->max_tx_bndl_sz)
<------><------>/* tx_bndl_mask is enabled per AC, each has 1 bit */
<------><------>target->tx_bndl_mask = (1 << WMM_NUM_AC) - 1;
<------>if (target->max_rx_bndl_sz)
<------><------>target->rx_bndl_enable = true;
<------>if ((target->tgt_cred_sz % target->block_sz) != 0) {
<------><------>ath6kl_warn("credit size: %d is not block aligned! Disabling send bundling\n",
<------><------><------> target->tgt_cred_sz);
<------><------>/*
<------><------> * Disallow send bundling since the credit size is
<------><------> * not aligned to a block size the I/O block
<------><------> * padding will spill into the next credit buffer
<------><------> * which is fatal.
<------><------> */
<------><------>target->tx_bndl_mask = 0;
<------>}
}
static int ath6kl_htc_mbox_wait_target(struct htc_target *target)
{
<------>struct htc_packet *packet = NULL;
<------>struct htc_ready_ext_msg *rdy_msg;
<------>struct htc_service_connect_req connect;
<------>struct htc_service_connect_resp resp;
<------>int status;
<------>/* we should be getting 1 control message that the target is ready */
<------>packet = htc_wait_for_ctrl_msg(target);
<------>if (!packet)
<------><------>return -ENOMEM;
<------>/* we controlled the buffer creation so it's properly aligned */
<------>rdy_msg = (struct htc_ready_ext_msg *)packet->buf;
<------>if ((le16_to_cpu(rdy_msg->ver2_0_info.msg_id) != HTC_MSG_READY_ID) ||
<------> (packet->act_len < sizeof(struct htc_ready_msg))) {
<------><------>status = -ENOMEM;
<------><------>goto fail_wait_target;
<------>}
<------>if (!rdy_msg->ver2_0_info.cred_cnt || !rdy_msg->ver2_0_info.cred_sz) {
<------><------>status = -ENOMEM;
<------><------>goto fail_wait_target;
<------>}
<------>target->tgt_creds = le16_to_cpu(rdy_msg->ver2_0_info.cred_cnt);
<------>target->tgt_cred_sz = le16_to_cpu(rdy_msg->ver2_0_info.cred_sz);
<------>ath6kl_dbg(ATH6KL_DBG_BOOT,
<------><------> "htc target ready credits %d size %d\n",
<------><------> target->tgt_creds, target->tgt_cred_sz);
<------>/* check if this is an extended ready message */
<------>if (packet->act_len >= sizeof(struct htc_ready_ext_msg)) {
<------><------>/* this is an extended message */
<------><------>target->htc_tgt_ver = rdy_msg->htc_ver;
<------><------>target->msg_per_bndl_max = rdy_msg->msg_per_htc_bndl;
<------>} else {
<------><------>/* legacy */
<------><------>target->htc_tgt_ver = HTC_VERSION_2P0;
<------><------>target->msg_per_bndl_max = 0;
<------>}
<------>ath6kl_dbg(ATH6KL_DBG_BOOT, "htc using protocol %s (%d)\n",
<------><------> (target->htc_tgt_ver == HTC_VERSION_2P0) ? "2.0" : ">= 2.1",
<------><------> target->htc_tgt_ver);
<------>if (target->msg_per_bndl_max > 0)
<------><------>htc_setup_msg_bndl(target);
<------>/* setup our pseudo HTC control endpoint connection */
<------>memset(&connect, 0, sizeof(connect));
<------>memset(&resp, 0, sizeof(resp));
<------>connect.ep_cb.rx = htc_ctrl_rx;
<------>connect.ep_cb.rx_refill = NULL;
<------>connect.ep_cb.tx_full = NULL;
<------>connect.max_txq_depth = NUM_CONTROL_BUFFERS;
<------>connect.svc_id = HTC_CTRL_RSVD_SVC;
<------>/* connect fake service */
<------>status = ath6kl_htc_mbox_conn_service((void *)target, &connect, &resp);
<------>if (status)
<------><------>/*
<------><------> * FIXME: this call doesn't make sense, the caller should
<------><------> * call ath6kl_htc_mbox_cleanup() when it wants remove htc
<------><------> */
<------><------>ath6kl_hif_cleanup_scatter(target->dev->ar);
fail_wait_target:
<------>if (packet) {
<------><------>htc_rxpkt_reset(packet);
<------><------>reclaim_rx_ctrl_buf(target, packet);
<------>}
<------>return status;
}
/*
* Start HTC, enable interrupts and let the target know
* host has finished setup.
*/
static int ath6kl_htc_mbox_start(struct htc_target *target)
{
<------>struct htc_packet *packet;
<------>int status;
<------>memset(&target->dev->irq_proc_reg, 0,
<------> sizeof(target->dev->irq_proc_reg));
<------>/* Disable interrupts at the chip level */
<------>ath6kl_hif_disable_intrs(target->dev);
<------>target->htc_flags = 0;
<------>target->rx_st_flags = 0;
<------>/* Push control receive buffers into htc control endpoint */
<------>while ((packet = htc_get_control_buf(target, false)) != NULL) {
<------><------>status = htc_add_rxbuf(target, packet);
<------><------>if (status)
<------><------><------>return status;
<------>}
<------>/* NOTE: the first entry in the distribution list is ENDPOINT_0 */
<------>ath6kl_credit_init(target->credit_info, &target->cred_dist_list,
<------><------><------> target->tgt_creds);
<------>dump_cred_dist_stats(target);
<------>/* Indicate to the target of the setup completion */
<------>status = htc_setup_tx_complete(target);
<------>if (status)
<------><------>return status;
<------>/* unmask interrupts */
<------>status = ath6kl_hif_unmask_intrs(target->dev);
<------>if (status)
<------><------>ath6kl_htc_mbox_stop(target);
<------>return status;
}
static int ath6kl_htc_reset(struct htc_target *target)
{
<------>u32 block_size, ctrl_bufsz;
<------>struct htc_packet *packet;
<------>int i;
<------>reset_ep_state(target);
<------>block_size = target->dev->ar->mbox_info.block_size;
<------>ctrl_bufsz = (block_size > HTC_MAX_CTRL_MSG_LEN) ?
<------><------> (block_size + HTC_HDR_LENGTH) :
<------><------> (HTC_MAX_CTRL_MSG_LEN + HTC_HDR_LENGTH);
<------>for (i = 0; i < NUM_CONTROL_BUFFERS; i++) {
<------><------>packet = kzalloc(sizeof(*packet), GFP_KERNEL);
<------><------>if (!packet)
<------><------><------>return -ENOMEM;
<------><------>packet->buf_start = kzalloc(ctrl_bufsz, GFP_KERNEL);
<------><------>if (!packet->buf_start) {
<------><------><------>kfree(packet);
<------><------><------>return -ENOMEM;
<------><------>}
<------><------>packet->buf_len = ctrl_bufsz;
<------><------>if (i < NUM_CONTROL_RX_BUFFERS) {
<------><------><------>packet->act_len = 0;
<------><------><------>packet->buf = packet->buf_start;
<------><------><------>packet->endpoint = ENDPOINT_0;
<------><------><------>list_add_tail(&packet->list, &target->free_ctrl_rxbuf);
<------><------>} else {
<------><------><------>list_add_tail(&packet->list, &target->free_ctrl_txbuf);
<------><------>}
<------>}
<------>return 0;
}
/* htc_stop: stop interrupt reception, and flush all queued buffers */
static void ath6kl_htc_mbox_stop(struct htc_target *target)
{
<------>spin_lock_bh(&target->htc_lock);
<------>target->htc_flags |= HTC_OP_STATE_STOPPING;
<------>spin_unlock_bh(&target->htc_lock);
<------>/*
<------> * Masking interrupts is a synchronous operation, when this
<------> * function returns all pending HIF I/O has completed, we can
<------> * safely flush the queues.
<------> */
<------>ath6kl_hif_mask_intrs(target->dev);
<------>ath6kl_htc_flush_txep_all(target);
<------>ath6kl_htc_mbox_flush_rx_buf(target);
<------>ath6kl_htc_reset(target);
}
static void *ath6kl_htc_mbox_create(struct ath6kl *ar)
{
<------>struct htc_target *target = NULL;
<------>int status = 0;
<------>target = kzalloc(sizeof(*target), GFP_KERNEL);
<------>if (!target) {
<------><------>ath6kl_err("unable to allocate memory\n");
<------><------>return NULL;
<------>}
<------>target->dev = kzalloc(sizeof(*target->dev), GFP_KERNEL);
<------>if (!target->dev) {
<------><------>ath6kl_err("unable to allocate memory\n");
<------><------>kfree(target);
<------><------>return NULL;
<------>}
<------>spin_lock_init(&target->htc_lock);
<------>spin_lock_init(&target->rx_lock);
<------>spin_lock_init(&target->tx_lock);
<------>INIT_LIST_HEAD(&target->free_ctrl_txbuf);
<------>INIT_LIST_HEAD(&target->free_ctrl_rxbuf);
<------>INIT_LIST_HEAD(&target->cred_dist_list);
<------>target->dev->ar = ar;
<------>target->dev->htc_cnxt = target;
<------>target->ep_waiting = ENDPOINT_MAX;
<------>status = ath6kl_hif_setup(target->dev);
<------>if (status)
<------><------>goto err_htc_cleanup;
<------>status = ath6kl_htc_reset(target);
<------>if (status)
<------><------>goto err_htc_cleanup;
<------>return target;
err_htc_cleanup:
<------>ath6kl_htc_mbox_cleanup(target);
<------>return NULL;
}
/* cleanup the HTC instance */
static void ath6kl_htc_mbox_cleanup(struct htc_target *target)
{
<------>struct htc_packet *packet, *tmp_packet;
<------>ath6kl_hif_cleanup_scatter(target->dev->ar);
<------>list_for_each_entry_safe(packet, tmp_packet,
<------><------><------><------> &target->free_ctrl_txbuf, list) {
<------><------>list_del(&packet->list);
<------><------>kfree(packet->buf_start);
<------><------>kfree(packet);
<------>}
<------>list_for_each_entry_safe(packet, tmp_packet,
<------><------><------><------> &target->free_ctrl_rxbuf, list) {
<------><------>list_del(&packet->list);
<------><------>kfree(packet->buf_start);
<------><------>kfree(packet);
<------>}
<------>kfree(target->dev);
<------>kfree(target);
}
static const struct ath6kl_htc_ops ath6kl_htc_mbox_ops = {
<------>.create = ath6kl_htc_mbox_create,
<------>.wait_target = ath6kl_htc_mbox_wait_target,
<------>.start = ath6kl_htc_mbox_start,
<------>.conn_service = ath6kl_htc_mbox_conn_service,
<------>.tx = ath6kl_htc_mbox_tx,
<------>.stop = ath6kl_htc_mbox_stop,
<------>.cleanup = ath6kl_htc_mbox_cleanup,
<------>.flush_txep = ath6kl_htc_mbox_flush_txep,
<------>.flush_rx_buf = ath6kl_htc_mbox_flush_rx_buf,
<------>.activity_changed = ath6kl_htc_mbox_activity_changed,
<------>.get_rxbuf_num = ath6kl_htc_mbox_get_rxbuf_num,
<------>.add_rxbuf_multiple = ath6kl_htc_mbox_add_rxbuf_multiple,
<------>.credit_setup = ath6kl_htc_mbox_credit_setup,
};
void ath6kl_htc_mbox_attach(struct ath6kl *ar)
{
<------>ar->htc_ops = &ath6kl_htc_mbox_ops;
}