obj-$(CONFIG_ATH6KL) += ath6kl_core.o
ath6kl_core-y += debug.o
ath6kl_core-y += hif.o
-ath6kl_core-y += htc.o
+ath6kl_core-y += htc_mbox.o
ath6kl_core-y += bmi.o
ath6kl_core-y += cfg80211.o
ath6kl_core-y += init.o
#include "debug.h"
#include "hif-ops.h"
+#include "htc-ops.h"
#include "cfg80211.h"
unsigned int debug_mask;
module_param(ath6kl_p2p, uint, 0644);
module_param(testmode, uint, 0644);
-int ath6kl_core_init(struct ath6kl *ar)
+int ath6kl_core_init(struct ath6kl *ar, enum ath6kl_htc_type htc_type)
{
struct ath6kl_bmi_target_info targ_info;
struct net_device *ndev;
int ret = 0, i;
+ switch (htc_type) {
+ case ATH6KL_HTC_TYPE_MBOX:
+ ath6kl_htc_mbox_attach(ar);
+ break;
+ default:
+ WARN_ON(1);
+ return -ENOMEM;
+ }
+
ar->ath6kl_wq = create_singlethread_workqueue("ath6kl");
if (!ar->ath6kl_wq)
return -ENOMEM;
ATH6KL_HIF_TYPE_USB,
};
+enum ath6kl_htc_type {
+ ATH6KL_HTC_TYPE_MBOX,
+};
+
/* Max number of filters that hw supports */
#define ATH6K_MAX_MC_FILTERS_PER_LIST 7
struct ath6kl_mc_filter {
struct ath6kl_bmi bmi;
const struct ath6kl_hif_ops *hif_ops;
+ const struct ath6kl_htc_ops *htc_ops;
struct wmi *wmi;
int tx_pending[ENDPOINT_MAX];
int total_tx_data_pend;
void ath6kl_check_wow_status(struct ath6kl *ar);
struct ath6kl *ath6kl_core_create(struct device *dev);
-int ath6kl_core_init(struct ath6kl *ar);
+int ath6kl_core_init(struct ath6kl *ar, enum ath6kl_htc_type htc_type);
void ath6kl_core_cleanup(struct ath6kl *ar);
void ath6kl_core_destroy(struct ath6kl *ar);
--- /dev/null
+/*
+ * Copyright (c) 2004-2011 Atheros Communications 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.
+ */
+
+#ifndef HTC_OPS_H
+#define HTC_OPS_H
+
+#include "htc.h"
+#include "debug.h"
+
+static inline void *ath6kl_htc_create(struct ath6kl *ar)
+{
+ return ar->htc_ops->create(ar);
+}
+
+static inline int ath6kl_htc_wait_target(struct htc_target *target)
+{
+ return target->dev->ar->htc_ops->wait_target(target);
+}
+
+static inline int ath6kl_htc_start(struct htc_target *target)
+{
+ return target->dev->ar->htc_ops->start(target);
+}
+
+static inline int ath6kl_htc_conn_service(struct htc_target *target,
+ struct htc_service_connect_req *req,
+ struct htc_service_connect_resp *resp)
+{
+ return target->dev->ar->htc_ops->conn_service(target, req, resp);
+}
+
+static inline int ath6kl_htc_tx(struct htc_target *target,
+ struct htc_packet *packet)
+{
+ return target->dev->ar->htc_ops->tx(target, packet);
+}
+
+static inline void ath6kl_htc_stop(struct htc_target *target)
+{
+ return target->dev->ar->htc_ops->stop(target);
+}
+
+static inline void ath6kl_htc_cleanup(struct htc_target *target)
+{
+ return target->dev->ar->htc_ops->cleanup(target);
+}
+
+static inline void ath6kl_htc_flush_txep(struct htc_target *target,
+ enum htc_endpoint_id endpoint,
+ u16 tag)
+{
+ return target->dev->ar->htc_ops->flush_txep(target, endpoint, tag);
+}
+
+static inline void ath6kl_htc_flush_rx_buf(struct htc_target *target)
+{
+ return target->dev->ar->htc_ops->flush_rx_buf(target);
+}
+
+static inline void ath6kl_htc_activity_changed(struct htc_target *target,
+ enum htc_endpoint_id endpoint,
+ bool active)
+{
+ return target->dev->ar->htc_ops->activity_changed(target, endpoint,
+ active);
+}
+
+static inline int ath6kl_htc_get_rxbuf_num(struct htc_target *target,
+ enum htc_endpoint_id endpoint)
+{
+ return target->dev->ar->htc_ops->get_rxbuf_num(target, endpoint);
+}
+
+static inline int ath6kl_htc_add_rxbuf_multiple(struct htc_target *target,
+ struct list_head *pktq)
+{
+ return target->dev->ar->htc_ops->add_rxbuf_multiple(target, pktq);
+}
+
+static inline int ath6kl_htc_credit_setup(struct htc_target *target,
+ struct ath6kl_htc_credit_info *info)
+{
+ return target->dev->ar->htc_ops->credit_setup(target, info);
+}
+
+static inline void ath6kl_htc_tx_complete(struct ath6kl *ar,
+ struct sk_buff *skb)
+{
+ ar->htc_ops->tx_complete(ar, skb);
+}
+
+
+static inline void ath6kl_htc_rx_complete(struct ath6kl *ar,
+ struct sk_buff *skb, u8 pipe)
+{
+ ar->htc_ops->rx_complete(ar, skb, pipe);
+}
+
+
+#endif
+++ /dev/null
-/*
- * 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 <asm/unaligned.h>
-
-#define CALC_TXRX_PADDED_LEN(dev, len) (__ALIGN_MASK((len), (dev)->block_mask))
-
-/* 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;
- } else if (cur_ep_dist->svc_id == WMI_DATA_BK_SVC)
- /* this is the lowest priority data endpoint */
- /* FIXME: this looks fishy, check */
- cred_info->lowestpri_ep_dist = cur_ep_dist->list;
-
- /*
- * 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
- */
- }
-
- 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 */
-int ath6kl_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);
-
- 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;
- 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);
- 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;
-
- 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);
- ath6kl_htc_tx_issue(target, 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);
-
- if (send_pkt != NULL)
- htc_reclaim_txctrl_buf(target, send_pkt);
-
- return status;
-}
-
-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;
- }
- }
-}
-
-int ath6kl_htc_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 */
-void ath6kl_htc_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_flush_txep(target, i, HTC_TX_PACKET_TAG_ALL);
- }
-}
-
-void ath6kl_htc_indicate_activity_change(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_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 x%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];
-
- /* 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) {
- 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;
-
- /* 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;
-}
-
-int ath6kl_htc_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;
-}
-
-void ath6kl_htc_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);
- }
-}
-
-int ath6kl_htc_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 (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);
-}
-
-int ath6kl_htc_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;
- }
-}
-
-int ath6kl_htc_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;
-
- /* FIXME: remove once USB support is implemented */
- if (target->dev->ar->hif_type == ATH6KL_HIF_TYPE_USB) {
- ath6kl_err("HTC doesn't support USB yet. Patience!\n");
- return -EOPNOTSUPP;
- }
-
- /* 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_conn_service((void *)target, &connect, &resp);
-
- if (status)
- /*
- * FIXME: this call doesn't make sense, the caller should
- * call ath6kl_htc_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.
- */
-int ath6kl_htc_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_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 */
-void ath6kl_htc_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_flush_rx_buf(target);
-
- ath6kl_htc_reset(target);
-}
-
-void *ath6kl_htc_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");
- status = -ENOMEM;
- goto err_htc_cleanup;
- }
-
- 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_cleanup(target);
-
- return NULL;
-}
-
-/* cleanup the HTC instance */
-void ath6kl_htc_cleanup(struct htc_target *target)
-{
- struct htc_packet *packet, *tmp_packet;
-
- /* FIXME: remove check once USB support is implemented */
- if (target->dev->ar->hif_type != ATH6KL_HIF_TYPE_USB)
- 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);
-}
u8 *buf;
};
+struct ath6kl_htc_ops {
+ void* (*create)(struct ath6kl *ar);
+ int (*wait_target)(struct htc_target *target);
+ int (*start)(struct htc_target *target);
+ int (*conn_service)(struct htc_target *target,
+ struct htc_service_connect_req *req,
+ struct htc_service_connect_resp *resp);
+ int (*tx)(struct htc_target *target, struct htc_packet *packet);
+ void (*stop)(struct htc_target *target);
+ void (*cleanup)(struct htc_target *target);
+ void (*flush_txep)(struct htc_target *target,
+ enum htc_endpoint_id endpoint, u16 tag);
+ void (*flush_rx_buf)(struct htc_target *target);
+ void (*activity_changed)(struct htc_target *target,
+ enum htc_endpoint_id endpoint,
+ bool active);
+ int (*get_rxbuf_num)(struct htc_target *target,
+ enum htc_endpoint_id endpoint);
+ int (*add_rxbuf_multiple)(struct htc_target *target,
+ struct list_head *pktq);
+ int (*credit_setup)(struct htc_target *target,
+ struct ath6kl_htc_credit_info *cred_info);
+ int (*tx_complete)(struct ath6kl *ar, struct sk_buff *skb);
+ int (*rx_complete)(struct ath6kl *ar, struct sk_buff *skb, u8 pipe);
+};
+
struct ath6kl_device;
/* our HTC target state */
u32 ac_tx_count[WMM_NUM_AC];
};
-void *ath6kl_htc_create(struct ath6kl *ar);
-void ath6kl_htc_set_credit_dist(struct htc_target *target,
- struct ath6kl_htc_credit_info *cred_info,
- u16 svc_pri_order[], int len);
-int ath6kl_htc_wait_target(struct htc_target *target);
-int ath6kl_htc_start(struct htc_target *target);
-int ath6kl_htc_conn_service(struct htc_target *target,
- struct htc_service_connect_req *req,
- struct htc_service_connect_resp *resp);
-int ath6kl_htc_tx(struct htc_target *target, struct htc_packet *packet);
-void ath6kl_htc_stop(struct htc_target *target);
-void ath6kl_htc_cleanup(struct htc_target *target);
-void ath6kl_htc_flush_txep(struct htc_target *target,
- enum htc_endpoint_id endpoint, u16 tag);
-void ath6kl_htc_flush_rx_buf(struct htc_target *target);
-void ath6kl_htc_indicate_activity_change(struct htc_target *target,
- enum htc_endpoint_id endpoint,
- bool active);
-int ath6kl_htc_get_rxbuf_num(struct htc_target *target,
- enum htc_endpoint_id endpoint);
-int ath6kl_htc_add_rxbuf_multiple(struct htc_target *target,
- struct list_head *pktq);
int ath6kl_htc_rxmsg_pending_handler(struct htc_target *target,
u32 msg_look_ahead, int *n_pkts);
-int ath6kl_credit_setup(struct htc_target *htc_target,
- struct ath6kl_htc_credit_info *cred_info);
-
static inline void set_htc_pkt_info(struct htc_packet *packet, void *context,
u8 *buf, unsigned int len,
enum htc_endpoint_id eid, u16 tag)
return depth;
}
+void ath6kl_htc_mbox_attach(struct ath6kl *ar);
+
#endif
--- /dev/null
+/*
+ * 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 <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;
+ } else if (cur_ep_dist->svc_id == WMI_DATA_BK_SVC)
+ /* this is the lowest priority data endpoint */
+ /* FIXME: this looks fishy, check */
+ cred_info->lowestpri_ep_dist = cur_ep_dist->list;
+
+ /*
+ * 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
+ */
+ }
+
+ 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);
+
+ 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;
+ 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);
+ 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;
+
+ 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);
+ ath6kl_htc_tx_issue(target, 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);
+
+ if (send_pkt != NULL)
+ 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 x%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];
+
+ /* 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) {
+ 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;
+
+ /* 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 (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;
+
+ /* FIXME: remove once USB support is implemented */
+ if (target->dev->ar->hif_type == ATH6KL_HIF_TYPE_USB) {
+ ath6kl_err("HTC doesn't support USB yet. Patience!\n");
+ return -EOPNOTSUPP;
+ }
+
+ /* 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");
+ status = -ENOMEM;
+ goto err_htc_cleanup;
+ }
+
+ 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;
+
+ /* FIXME: remove check once USB support is implemented */
+ if (target->dev->ar->hif_type != ATH6KL_HIF_TYPE_USB)
+ 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;
+}
#include "target.h"
#include "debug.h"
#include "hif-ops.h"
+#include "htc-ops.h"
static const struct ath6kl_hw hw_list[] = {
{
}
/* setup credit distribution */
- ath6kl_credit_setup(ar->htc_target, &ar->credit_state_info);
+ ath6kl_htc_credit_setup(ar->htc_target, &ar->credit_state_info);
/* start HTC */
ret = ath6kl_htc_start(ar->htc_target);
goto err_core_alloc;
}
- ret = ath6kl_core_init(ar);
+ ret = ath6kl_core_init(ar, ATH6KL_HTC_TYPE_MBOX);
if (ret) {
ath6kl_err("Failed to init ath6kl core\n");
goto err_core_alloc;
#include "core.h"
#include "debug.h"
+#include "htc-ops.h"
/*
* tid - tid_mux0..tid_mux3
notify_htc:
/* notify HTC, this may cause credit distribution changes */
- ath6kl_htc_indicate_activity_change(ar->htc_target, eid, active);
+ ath6kl_htc_activity_changed(ar->htc_target, eid, active);
}
enum htc_send_full_action ath6kl_tx_queue_full(struct htc_target *target,
ar_usb->ar = ar;
- ret = ath6kl_core_init(ar);
+ ret = ath6kl_core_init(ar, ATH6KL_HTC_TYPE_MBOX);
if (ret) {
ath6kl_err("Failed to init ath6kl core: %d\n", ret);
goto err_core_free;
projects / cascardo / linux.git / commitdiff