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| #include "core.h" |
| #include "hif.h" |
| #include "debug.h" |
| #include "hif-ops.h" |
| #include "trace.h" |
| |
| #include <asm/unaligned.h> |
| |
| #define CALC_TXRX_PADDED_LEN(dev, len) (__ALIGN_MASK((len), (dev)->block_mask)) |
| |
| static void ath6kl_htc_mbox_cleanup(struct htc_target *target); |
| static void ath6kl_htc_mbox_stop(struct htc_target *target); |
| static int ath6kl_htc_mbox_add_rxbuf_multiple(struct htc_target *target, |
| <------><------><------><------><------> struct list_head *pkt_queue); |
| static void ath6kl_htc_set_credit_dist(struct htc_target *target, |
| <------><------><------><------> struct ath6kl_htc_credit_info *cred_info, |
| <------><------><------><------> u16 svc_pri_order[], int len); |
| |
| |
| #define TX_RESUME_BUNDLE_THRESHOLD 1500 |
| |
| |
| static void ath6kl_credit_deposit(struct ath6kl_htc_credit_info *cred_info, |
| <------><------><------><------> struct htc_endpoint_credit_dist *ep_dist, |
| <------><------><------><------> int credits) |
| { |
| <------>ath6kl_dbg(ATH6KL_DBG_CREDIT, "credit deposit ep %d credits %d\n", |
| <------><------> ep_dist->endpoint, credits); |
| |
| <------>ep_dist->credits += credits; |
| <------>ep_dist->cred_assngd += credits; |
| <------>cred_info->cur_free_credits -= credits; |
| } |
| |
| static void ath6kl_credit_init(struct ath6kl_htc_credit_info *cred_info, |
| <------><------><------> struct list_head *ep_list, |
| <------><------><------> int tot_credits) |
| { |
| <------>struct htc_endpoint_credit_dist *cur_ep_dist; |
| <------>int count; |
| |
| <------>ath6kl_dbg(ATH6KL_DBG_CREDIT, "credit init total %d\n", tot_credits); |
| |
| <------>cred_info->cur_free_credits = tot_credits; |
| <------>cred_info->total_avail_credits = tot_credits; |
| |
| <------>list_for_each_entry(cur_ep_dist, ep_list, list) { |
| <------><------>if (cur_ep_dist->endpoint == ENDPOINT_0) |
| <------><------><------>continue; |
| |
| <------><------>cur_ep_dist->cred_min = cur_ep_dist->cred_per_msg; |
| |
| <------><------>if (tot_credits > 4) { |
| <------><------><------>if ((cur_ep_dist->svc_id == WMI_DATA_BK_SVC) || |
| <------><------><------> (cur_ep_dist->svc_id == WMI_DATA_BE_SVC)) { |
| <------><------><------><------>ath6kl_credit_deposit(cred_info, |
| <------><------><------><------><------><------> cur_ep_dist, |
| <------><------><------><------><------><------> cur_ep_dist->cred_min); |
| <------><------><------><------>cur_ep_dist->dist_flags |= HTC_EP_ACTIVE; |
| <------><------><------>} |
| <------><------>} |
| |
| <------><------>if (cur_ep_dist->svc_id == WMI_CONTROL_SVC) { |
| <------><------><------>ath6kl_credit_deposit(cred_info, cur_ep_dist, |
| <------><------><------><------><------> cur_ep_dist->cred_min); |
| <------><------><------> |
| <------><------><------> * Control service is always marked active, it |
| <------><------><------> * never goes inactive EVER. |
| <------><------><------> */ |
| <------><------><------>cur_ep_dist->dist_flags |= HTC_EP_ACTIVE; |
| <------><------>} |
| |
| <------><------> |
| <------><------> * Streams have to be created (explicit | implicit) for all |
| <------><------> * kinds of traffic. BE endpoints are also inactive in the |
| <------><------> * beginning. When BE traffic starts it creates implicit |
| <------><------> * streams that redistributes credits. |
| <------><------> * |
| <------><------> * Note: all other endpoints have minimums set but are |
| <------><------> * initially given NO credits. credits will be distributed |
| <------><------> * as traffic activity demands |
| <------><------> */ |
| <------>} |
| |
| <------> |
| <------> * For ath6kl_credit_seek function, |
| <------> * it use list_for_each_entry_reverse to walk around the whole ep list. |
| <------> * Therefore assign this lowestpri_ep_dist after walk around the ep_list |
| <------> */ |
| <------>cred_info->lowestpri_ep_dist = cur_ep_dist->list; |
| |
| <------>WARN_ON(cred_info->cur_free_credits <= 0); |
| |
| <------>list_for_each_entry(cur_ep_dist, ep_list, list) { |
| <------><------>if (cur_ep_dist->endpoint == ENDPOINT_0) |
| <------><------><------>continue; |
| |
| <------><------>if (cur_ep_dist->svc_id == WMI_CONTROL_SVC) { |
| <------><------><------>cur_ep_dist->cred_norm = cur_ep_dist->cred_per_msg; |
| <------><------>} else { |
| <------><------><------> |
| <------><------><------> * For the remaining data endpoints, we assume that |
| <------><------><------> * each cred_per_msg are the same. We use a simple |
| <------><------><------> * calculation here, we take the remaining credits |
| <------><------><------> * and determine how many max messages this can |
| <------><------><------> * cover and then set each endpoint's normal value |
| <------><------><------> * equal to 3/4 this amount. |
| <------><------><------> */ |
| <------><------><------>count = (cred_info->cur_free_credits / |
| <------><------><------><------> cur_ep_dist->cred_per_msg) |
| <------><------><------><------>* cur_ep_dist->cred_per_msg; |
| <------><------><------>count = (count * 3) >> 2; |
| <------><------><------>count = max(count, cur_ep_dist->cred_per_msg); |
| <------><------><------>cur_ep_dist->cred_norm = count; |
| <------><------>} |
| |
| <------><------>ath6kl_dbg(ATH6KL_DBG_CREDIT, |
| <------><------><------> "credit ep %d svc_id %d credits %d per_msg %d norm %d min %d\n", |
| <------><------><------> cur_ep_dist->endpoint, |
| <------><------><------> cur_ep_dist->svc_id, |
| <------><------><------> cur_ep_dist->credits, |
| <------><------><------> cur_ep_dist->cred_per_msg, |
| <------><------><------> cur_ep_dist->cred_norm, |
| <------><------><------> cur_ep_dist->cred_min); |
| <------>} |
| } |
| |
| |
| 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; |
| <------>servicepriority[1] = WMI_DATA_VO_SVC; |
| <------>servicepriority[2] = WMI_DATA_VI_SVC; |
| <------>servicepriority[3] = WMI_DATA_BE_SVC; |
| <------>servicepriority[4] = WMI_DATA_BK_SVC; |
| |
| <------> |
| <------>ath6kl_htc_set_credit_dist(htc_target, cred_info, servicepriority, 5); |
| |
| <------>return 0; |
| } |
| |
| |
| 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); |
| <------><------><------>} |
| <------><------>} |
| <------>} |
| } |
| |
| |
| |
| |
| |
| 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: |
| <------> |
| <------>if (credits) |
| <------><------>ath6kl_credit_deposit(cred_info, ep_dist, credits); |
| |
| <------>ep_dist->seek_cred = 0; |
| } |
| |
| |
| 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); |
| <------><------>} |
| <------>} |
| } |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| 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; |
| |
| <------> |
| <------>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); |
| |
| <------> |
| <------>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); |
| <------> |
| <------>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]; |
| |
| <------> |
| <------>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); |
| <------>} |
| |
| <------> |
| <------>hif_scatter_req_add(target->dev->ar, scat_req); |
| |
| <------> |
| <------>htc_tx_complete(endpoint, &tx_compq); |
| } |
| |
| static int ath6kl_htc_tx_issue(struct htc_target *target, |
| <------><------><------> struct htc_packet *packet) |
| { |
| <------>int status; |
| <------>bool sync = false; |
| <------>u32 padded_len, send_len; |
| |
| <------>if (!packet->completion) |
| <------><------>sync = true; |
| |
| <------>send_len = packet->act_len + HTC_HDR_LENGTH; |
| |
| <------>padded_len = CALC_TXRX_PADDED_LEN(target, send_len); |
| |
| <------>ath6kl_dbg(ATH6KL_DBG_HTC, |
| <------><------> "htc tx issue len %d seqno %d padded_len %d mbox 0x%X %s\n", |
| <------><------> send_len, packet->info.tx.seqno, padded_len, |
| <------><------> target->dev->ar->mbox_info.htc_addr, |
| <------><------> sync ? "sync" : "async"); |
| |
| <------>if (sync) { |
| <------><------>status = hif_read_write_sync(target->dev->ar, |
| <------><------><------><------>target->dev->ar->mbox_info.htc_addr, |
| <------><------><------><------> packet->buf, padded_len, |
| <------><------><------><------> HIF_WR_SYNC_BLOCK_INC); |
| |
| <------><------>packet->status = status; |
| <------><------>packet->buf += HTC_HDR_LENGTH; |
| <------>} else |
| <------><------>status = hif_write_async(target->dev->ar, |
| <------><------><------><------>target->dev->ar->mbox_info.htc_addr, |
| <------><------><------><------>packet->buf, padded_len, |
| <------><------><------><------>HIF_WR_ASYNC_BLOCK_INC, packet); |
| |
| <------>trace_ath6kl_htc_tx(status, packet->endpoint, packet->buf, send_len); |
| |
| <------>return status; |
| } |
| |
| static int htc_check_credits(struct htc_target *target, |
| <------><------><------> struct htc_endpoint *ep, u8 *flags, |
| <------><------><------> enum htc_endpoint_id eid, unsigned int len, |
| <------><------><------> int *req_cred) |
| { |
| <------>*req_cred = (len > target->tgt_cred_sz) ? |
| <------><------> DIV_ROUND_UP(len, target->tgt_cred_sz) : 1; |
| |
| <------>ath6kl_dbg(ATH6KL_DBG_CREDIT, "credit check need %d got %d\n", |
| <------><------> *req_cred, ep->cred_dist.credits); |
| |
| <------>if (ep->cred_dist.credits < *req_cred) { |
| <------><------>if (eid == ENDPOINT_0) |
| <------><------><------>return -EINVAL; |
| |
| <------><------> |
| <------><------>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; |
| |
| <------> |
| <------>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); |
| |
| <------><------> |
| <------><------>if (ep->cred_dist.credits < ep->cred_dist.cred_per_msg) { |
| <------><------><------> |
| <------><------><------>*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; |
| |
| <------><------> |
| <------><------>packet = list_first_entry(&endpoint->txq, struct htc_packet, |
| <------><------><------><------><------> list); |
| <------><------>list_move_tail(&packet->list, queue); |
| |
| <------><------> |
| <------><------>packet->info.tx.cred_used = req_cred; |
| |
| <------><------> |
| <------><------>packet->completion = htc_tx_comp_handler; |
| <------><------>packet->context = target; |
| <------><------>endpoint->ep_st.tx_issued += 1; |
| |
| <------><------> |
| <------><------>packet->info.tx.flags = flags; |
| <------><------>packet->info.tx.seqno = endpoint->seqno; |
| <------><------>endpoint->seqno++; |
| <------>} |
| } |
| |
| |
| 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; |
| |
| <------> |
| <------>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 |
| <------><------> |
| <------><------>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; |
| <------><------> |
| <------><------>list_del(&packet->list); |
| |
| <------><------>scat_req->scat_list[i].packet = packet; |
| <------><------> |
| <------><------>flags = packet->info.tx.flags | HTC_FLAGS_SEND_BUNDLE; |
| <------><------>ath6kl_htc_tx_prep_pkt(packet, flags, |
| <------><------><------><------> cred_pad, packet->info.tx.seqno); |
| <------><------> |
| <------><------>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); |
| <------>} |
| |
| <------> |
| <------>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; |
| } |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| static void ath6kl_htc_tx_bundle(struct htc_endpoint *endpoint, |
| <------><------><------><------> struct list_head *queue, |
| <------><------><------><------> int *sent_bundle, int *n_bundle_pkts) |
| { |
| <------>struct htc_target *target = endpoint->target; |
| <------>struct hif_scatter_req *scat_req = NULL; |
| <------>int n_scat, n_sent_bundle = 0, tot_pkts_bundle = 0, i; |
| <------>struct htc_packet *packet; |
| <------>int status; |
| <------>u32 txb_mask; |
| <------>u8 ac = WMM_NUM_AC; |
| |
| <------>if ((HTC_CTRL_RSVD_SVC != endpoint->svc_id) && |
| <------> (WMI_CONTROL_SVC != endpoint->svc_id)) |
| <------><------>ac = target->dev->ar->ep2ac_map[endpoint->eid]; |
| |
| <------>while (true) { |
| <------><------>status = 0; |
| <------><------>n_scat = get_queue_depth(queue); |
| <------><------>n_scat = min(n_scat, target->msg_per_bndl_max); |
| |
| <------><------>if (n_scat < HTC_MIN_HTC_MSGS_TO_BUNDLE) |
| <------><------><------> |
| <------><------><------>break; |
| |
| <------><------>scat_req = hif_scatter_req_get(target->dev->ar); |
| |
| <------><------>if (!scat_req) { |
| <------><------><------> |
| <------><------><------>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; |
| <------><------>} |
| |
| <------><------> |
| <------><------>scat_req->complete = htc_async_tx_scat_complete; |
| <------><------>n_sent_bundle++; |
| <------><------>tot_pkts_bundle += scat_req->scat_entries; |
| |
| <------><------>ath6kl_dbg(ATH6KL_DBG_HTC, |
| <------><------><------> "htc tx scatter bytes %d entries %d\n", |
| <------><------><------> scat_req->len, scat_req->scat_entries); |
| |
| <------><------>for (i = 0; i < scat_req->scat_entries; i++) { |
| <------><------><------>packet = scat_req->scat_list[i].packet; |
| <------><------><------>trace_ath6kl_htc_tx(packet->status, packet->endpoint, |
| <------><------><------><------><------> packet->buf, packet->act_len); |
| <------><------>} |
| |
| <------><------>ath6kl_hif_submit_scat_req(target->dev, scat_req, false); |
| |
| <------><------>if (status) |
| <------><------><------>break; |
| <------>} |
| |
| <------>*sent_bundle = n_sent_bundle; |
| <------>*n_bundle_pkts = tot_pkts_bundle; |
| <------>ath6kl_dbg(ATH6KL_DBG_HTC, "htc tx bundle sent %d pkts\n", |
| <------><------> n_sent_bundle); |
| |
| <------>return; |
| } |
| |
| static void ath6kl_htc_tx_from_queue(struct htc_target *target, |
| <------><------><------><------> struct htc_endpoint *endpoint) |
| { |
| <------>struct list_head txq; |
| <------>struct htc_packet *packet; |
| <------>int bundle_sent; |
| <------>int n_pkts_bundle; |
| <------>u8 ac = WMM_NUM_AC; |
| <------>int status; |
| |
| <------>spin_lock_bh(&target->tx_lock); |
| |
| <------>endpoint->tx_proc_cnt++; |
| <------>if (endpoint->tx_proc_cnt > 1) { |
| <------><------>endpoint->tx_proc_cnt--; |
| <------><------>spin_unlock_bh(&target->tx_lock); |
| <------><------>ath6kl_dbg(ATH6KL_DBG_HTC, "htc tx busy\n"); |
| <------><------>return; |
| <------>} |
| |
| <------> |
| <------> * drain the endpoint TX queue for transmission as long |
| <------> * as we have enough credits. |
| <------> */ |
| <------>INIT_LIST_HEAD(&txq); |
| |
| <------>if ((HTC_CTRL_RSVD_SVC != endpoint->svc_id) && |
| <------> (WMI_CONTROL_SVC != endpoint->svc_id)) |
| <------><------>ac = target->dev->ar->ep2ac_map[endpoint->eid]; |
| |
| <------>while (true) { |
| <------><------>if (list_empty(&endpoint->txq)) |
| <------><------><------>break; |
| |
| <------><------>ath6kl_htc_tx_pkts_get(target, endpoint, &txq); |
| |
| <------><------>if (list_empty(&txq)) |
| <------><------><------>break; |
| |
| <------><------>spin_unlock_bh(&target->tx_lock); |
| |
| <------><------>bundle_sent = 0; |
| <------><------>n_pkts_bundle = 0; |
| |
| <------><------>while (true) { |
| <------><------><------> |
| <------><------><------>if ((target->tx_bndl_mask) && |
| <------><------><------> (get_queue_depth(&txq) >= |
| <------><------><------> HTC_MIN_HTC_MSGS_TO_BUNDLE)) { |
| <------><------><------><------>int temp1 = 0, temp2 = 0; |
| |
| <------><------><------><------> |
| <------><------><------><------>if (target->tx_bndl_mask & (1 << ac)) { |
| <------><------><------><------><------>ath6kl_htc_tx_bundle(endpoint, &txq, |
| <------><------><------><------><------><------><------> &temp1, &temp2); |
| <------><------><------><------><------>bundle_sent += temp1; |
| <------><------><------><------><------>n_pkts_bundle += temp2; |
| <------><------><------><------>} |
| <------><------><------>} |
| |
| <------><------><------>if (list_empty(&txq)) |
| <------><------><------><------>break; |
| |
| <------><------><------>packet = list_first_entry(&txq, struct htc_packet, |
| <------><------><------><------><------><------> list); |
| <------><------><------>list_del(&packet->list); |
| |
| <------><------><------>ath6kl_htc_tx_prep_pkt(packet, packet->info.tx.flags, |
| <------><------><------><------><------> 0, packet->info.tx.seqno); |
| <------><------><------>status = ath6kl_htc_tx_issue(target, packet); |
| |
| <------><------><------>if (status) { |
| <------><------><------><------>packet->status = status; |
| <------><------><------><------>packet->completion(packet->context, packet); |
| <------><------><------>} |
| <------><------>} |
| |
| <------><------>spin_lock_bh(&target->tx_lock); |
| |
| <------><------>endpoint->ep_st.tx_bundles += bundle_sent; |
| <------><------>endpoint->ep_st.tx_pkt_bundled += n_pkts_bundle; |
| |
| <------><------> |
| <------><------> * if an AC has bundling disabled and no tx bundling |
| <------><------> * has occured continously for a certain number of TX, |
| <------><------> * enable tx bundling for this AC |
| <------><------> */ |
| <------><------>if (!bundle_sent) { |
| <------><------><------>if (!(target->tx_bndl_mask & (1 << ac)) && |
| <------><------><------> (ac < WMM_NUM_AC)) { |
| <------><------><------><------>if (++target->ac_tx_count[ac] >= |
| <------><------><------><------><------>TX_RESUME_BUNDLE_THRESHOLD) { |
| <------><------><------><------><------>target->ac_tx_count[ac] = 0; |
| <------><------><------><------><------>target->tx_bndl_mask |= (1 << ac); |
| <------><------><------><------>} |
| <------><------><------>} |
| <------><------>} else { |
| <------><------><------> |
| <------><------><------>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) { |
| <------><------><------> |
| <------><------><------>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); |
| <------>} |
| |
| <------> |
| <------>send_pkt->completion = NULL; |
| <------>ath6kl_htc_tx_prep_pkt(send_pkt, 0, 0, 0); |
| <------>status = ath6kl_htc_tx_issue(target, send_pkt); |
| <------>htc_reclaim_txctrl_buf(target, send_pkt); |
| |
| <------>return status; |
| } |
| |
| static void ath6kl_htc_set_credit_dist(struct htc_target *target, |
| <------><------><------><------>struct ath6kl_htc_credit_info *credit_info, |
| <------><------><------><------>u16 srvc_pri_order[], int list_len) |
| { |
| <------>struct htc_endpoint *endpoint; |
| <------>int i, ep; |
| |
| <------>target->credit_info = credit_info; |
| |
| <------>list_add_tail(&target->endpoint[ENDPOINT_0].cred_dist.list, |
| <------><------> &target->cred_dist_list); |
| |
| <------>for (i = 0; i < list_len; i++) { |
| <------><------>for (ep = ENDPOINT_1; ep < ENDPOINT_MAX; ep++) { |
| <------><------><------>endpoint = &target->endpoint[ep]; |
| <------><------><------>if (endpoint->svc_id == srvc_pri_order[i]) { |
| <------><------><------><------>list_add_tail(&endpoint->cred_dist.list, |
| <------><------><------><------><------> &target->cred_dist_list); |
| <------><------><------><------>break; |
| <------><------><------>} |
| <------><------>} |
| <------><------>if (ep >= ENDPOINT_MAX) { |
| <------><------><------>WARN_ON(1); |
| <------><------><------>return; |
| <------><------>} |
| <------>} |
| } |
| |
| static int ath6kl_htc_mbox_tx(struct htc_target *target, |
| <------><------><------> struct htc_packet *packet) |
| { |
| <------>struct htc_endpoint *endpoint; |
| <------>struct list_head queue; |
| |
| <------>ath6kl_dbg(ATH6KL_DBG_HTC, |
| <------><------> "htc tx ep id %d buf 0x%p len %d\n", |
| <------><------> packet->endpoint, packet->buf, packet->act_len); |
| |
| <------>if (packet->endpoint >= ENDPOINT_MAX) { |
| <------><------>WARN_ON(1); |
| <------><------>return -EINVAL; |
| <------>} |
| |
| <------>endpoint = &target->endpoint[packet->endpoint]; |
| |
| <------>if (!ath6kl_htc_tx_try(target, endpoint, packet)) { |
| <------><------>packet->status = (target->htc_flags & HTC_OP_STATE_STOPPING) ? |
| <------><------><------><------> -ECANCELED : -ENOSPC; |
| <------><------>INIT_LIST_HEAD(&queue); |
| <------><------>list_add(&packet->list, &queue); |
| <------><------>htc_tx_complete(endpoint, &queue); |
| <------>} |
| |
| <------>return 0; |
| } |
| |
| |
| 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; |
| <------>} |
| |
| <------> |
| <------>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) |
| <------><------><------> |
| <------><------><------>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); |
| } |
| |
| |
| |
| static inline void ath6kl_htc_rx_update_stats(struct htc_endpoint *endpoint, |
| <------><------><------><------><------> int n_look_ahds) |
| { |
| <------>endpoint->ep_st.rx_pkts++; |
| <------>if (n_look_ahds == 1) |
| <------><------>endpoint->ep_st.rx_lkahds++; |
| <------>else if (n_look_ahds > 1) |
| <------><------>endpoint->ep_st.rx_bundle_lkahd++; |
| } |
| |
| static inline bool htc_valid_rx_frame_len(struct htc_target *target, |
| <------><------><------><------><------> enum htc_endpoint_id eid, int len) |
| { |
| <------>return (eid == target->dev->ar->ctrl_ep) ? |
| <------><------>len <= ATH6KL_BUFFER_SIZE : len <= ATH6KL_AMSDU_BUFFER_SIZE; |
| } |
| |
| static int htc_add_rxbuf(struct htc_target *target, struct htc_packet *packet) |
| { |
| <------>struct list_head queue; |
| |
| <------>INIT_LIST_HEAD(&queue); |
| <------>list_add_tail(&packet->list, &queue); |
| <------>return ath6kl_htc_mbox_add_rxbuf_multiple(target, &queue); |
| } |
| |
| static void htc_reclaim_rxbuf(struct htc_target *target, |
| <------><------><------> struct htc_packet *packet, |
| <------><------><------> struct htc_endpoint *ep) |
| { |
| <------>if (packet->info.rx.rx_flags & HTC_RX_PKT_NO_RECYCLE) { |
| <------><------>htc_rxpkt_reset(packet); |
| <------><------>packet->status = -ECANCELED; |
| <------><------>ep->ep_cb.rx(ep->target, packet); |
| <------>} else { |
| <------><------>htc_rxpkt_reset(packet); |
| <------><------>htc_add_rxbuf((void *)(target), packet); |
| <------>} |
| } |
| |
| static void reclaim_rx_ctrl_buf(struct htc_target *target, |
| <------><------><------><------>struct htc_packet *packet) |
| { |
| <------>spin_lock_bh(&target->htc_lock); |
| <------>list_add_tail(&packet->list, &target->free_ctrl_rxbuf); |
| <------>spin_unlock_bh(&target->htc_lock); |
| } |
| |
| static int ath6kl_htc_rx_packet(struct htc_target *target, |
| <------><------><------><------>struct htc_packet *packet, |
| <------><------><------><------>u32 rx_len) |
| { |
| <------>struct ath6kl_device *dev = target->dev; |
| <------>u32 padded_len; |
| <------>int status; |
| |
| <------>padded_len = CALC_TXRX_PADDED_LEN(target, rx_len); |
| |
| <------>if (padded_len > packet->buf_len) { |
| <------><------>ath6kl_err("not enough receive space for packet - padlen %d recvlen %d bufferlen %d\n", |
| <------><------><------> padded_len, rx_len, packet->buf_len); |
| <------><------>return -ENOMEM; |
| <------>} |
| |
| <------>ath6kl_dbg(ATH6KL_DBG_HTC, |
| <------><------> "htc rx 0x%p hdr 0x%x len %d mbox 0x%x\n", |
| <------><------> packet, packet->info.rx.exp_hdr, |
| <------><------> padded_len, dev->ar->mbox_info.htc_addr); |
| |
| <------>status = hif_read_write_sync(dev->ar, |
| <------><------><------><------> dev->ar->mbox_info.htc_addr, |
| <------><------><------><------> packet->buf, padded_len, |
| <------><------><------><------> HIF_RD_SYNC_BLOCK_FIX); |
| |
| <------>packet->status = status; |
| |
| <------>return status; |
| } |
| |
| |
| |
| |
| |
| |
| 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); |
| <------>} |
| } |
| |
| |
| 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; |
| <------> |
| <------>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 { |
| <------><------><------> |
| <------><------><------>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; |
| <------><------>} |
| |
| <------><------> |
| <------><------>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; |
| |
| <------><------> |
| <------><------>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 |
| <------><------><------> |
| <------><------><------>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; |
| |
| <------><------><------> |
| <------><------><------>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 |
| <------><------><------> |
| <------><------><------>n_msg = 1; |
| |
| <------><------> |
| <------><------>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) { |
| <------><------><------> |
| <------><------><------>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) |
| <------><------><------> |
| <------><------><------>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); |
| |
| <------><------><------> |
| <------><------><------>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; |
| <------><------>} |
| <------><------> |
| <------><------>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; |
| |
| <------><------> |
| <------><------>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; |
| |
| <------><------> |
| <------><------>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; |
| |
| <------><------> |
| <------><------>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; |
| |
| <------> |
| <------>hif_scatter_req_add(target->dev->ar, scat_req); |
| |
| fail_rx_pkt: |
| |
| <------>return status; |
| } |
| |
| static int ath6kl_htc_rx_process_packets(struct htc_target *target, |
| <------><------><------><------><------> struct list_head *comp_pktq, |
| <------><------><------><------><------> u32 lk_ahds[], |
| <------><------><------><------><------> int *n_lk_ahd) |
| { |
| <------>struct htc_packet *packet, *tmp_pkt; |
| <------>struct htc_endpoint *ep; |
| <------>int status = 0; |
| |
| <------>list_for_each_entry_safe(packet, tmp_pkt, comp_pktq, list) { |
| <------><------>ep = &target->endpoint[packet->endpoint]; |
| |
| <------><------>trace_ath6kl_htc_rx(packet->status, packet->endpoint, |
| <------><------><------><------> packet->buf, packet->act_len); |
| |
| <------><------> |
| <------><------>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; |
| |
| <------> |
| <------>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); |
| |
| <------><------><------> |
| <------><------><------>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; |
| |
| <------><------><------> |
| <------><------><------>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); |
| |
| <------><------> |
| <------><------>status = ath6kl_htc_rx_process_packets(target, &comp_pktq, |
| <------><------><------><------><------><------> look_aheads, |
| <------><------><------><------><------><------> &num_look_ahead); |
| |
| <------><------>if (!num_look_ahead || status) |
| <------><------><------>break; |
| |
| <------><------> |
| <------><------> * For SYNCH processing, if we get here, we are running |
| <------><------> * through the loop again due to a detected lookahead. Set |
| <------><------> * flag that we should re-check IRQ status registers again |
| <------><------> * before leaving IRQ processing, this can net better |
| <------><------> * performance in high throughput situations. |
| <------><------> */ |
| <------><------>target->chk_irq_status_cnt = 1; |
| <------>} |
| |
| <------>if (status) { |
| <------><------>if (status != -ECANCELED) |
| <------><------><------>ath6kl_err("failed to get pending recv messages: %d\n", |
| <------><------><------><------> status); |
| |
| <------><------> |
| <------><------>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; |
| } |
| |
| |
| |
| |
| |
| |
| 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; |
| |
| <------> |
| <------>packet->completion = NULL; |
| |
| <------> |
| <------>if (ath6kl_htc_rx_packet(target, packet, packet->act_len)) |
| <------><------>goto fail_ctrl_rx; |
| |
| <------>trace_ath6kl_htc_rx(packet->status, packet->endpoint, |
| <------><------><------> packet->buf, packet->act_len); |
| |
| <------> |
| <------>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; |
| |
| <------><------> |
| <------><------>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); |
| |
| <------> |
| <------>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)) |
| <------><------> |
| <------><------>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) |
| <------><------><------> |
| <------><------><------>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) { |
| <------><------> |
| <------><------>assigned_ep = ENDPOINT_0; |
| <------><------>max_msg_sz = HTC_MAX_CTRL_MSG_LEN; |
| <------>} else { |
| <------><------> |
| <------><------>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); |
| |
| <------><------> |
| <------><------>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; |
| |
| <------><------> |
| <------><------>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; |
| <------><------> |
| <------><------>if (resp_msg->status != HTC_SERVICE_SUCCESS) { |
| <------><------><------>ath6kl_err("target failed service 0x%X connect request (status:%d)\n", |
| <------><------><------><------> resp_msg->svc_id, resp_msg->status); |
| <------><------><------>status = -ENOMEM; |
| <------><------><------>goto fail_tx; |
| <------><------>} |
| |
| <------><------>assigned_ep = (enum htc_endpoint_id)resp_msg->eid; |
| <------><------>max_msg_sz = le16_to_cpu(resp_msg->max_msg_sz); |
| <------>} |
| |
| <------>if (WARN_ON_ONCE(assigned_ep == ENDPOINT_UNUSED || |
| <------><------><------> assigned_ep >= ENDPOINT_MAX || !max_msg_sz)) { |
| <------><------>status = -ENOMEM; |
| <------><------>goto fail_tx; |
| <------>} |
| |
| <------>endpoint = &target->endpoint[assigned_ep]; |
| <------>endpoint->eid = assigned_ep; |
| <------>if (endpoint->svc_id) { |
| <------><------>status = -ENOMEM; |
| <------><------>goto fail_tx; |
| <------>} |
| |
| <------> |
| <------>conn_resp->endpoint = assigned_ep; |
| <------>conn_resp->len_max = max_msg_sz; |
| |
| <------> |
| |
| <------> |
| <------>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; |
| |
| <------> |
| <------>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; |
| <------>} |
| |
| <------> |
| <------> |
| <------>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) |
| { |
| <------> |
| <------>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; |
| <------>} |
| |
| <------> |
| <------>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); |
| |
| <------> |
| <------>target->max_rx_bndl_sz = target->max_xfer_szper_scatreq; |
| <------> |
| <------>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) |
| <------><------> |
| <------><------>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; |
| |
| <------> |
| <------>packet = htc_wait_for_ctrl_msg(target); |
| |
| <------>if (!packet) |
| <------><------>return -ENOMEM; |
| |
| <------> |
| <------>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); |
| |
| <------> |
| <------>if (packet->act_len >= sizeof(struct htc_ready_ext_msg)) { |
| <------><------> |
| <------><------>target->htc_tgt_ver = rdy_msg->htc_ver; |
| <------><------>target->msg_per_bndl_max = rdy_msg->msg_per_htc_bndl; |
| <------>} else { |
| <------><------> |
| <------><------>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); |
| |
| <------> |
| <------>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; |
| |
| <------> |
| <------>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; |
| } |
| |
| |
| |
| |
| |
| 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)); |
| |
| <------> |
| <------>ath6kl_hif_disable_intrs(target->dev); |
| |
| <------>target->htc_flags = 0; |
| <------>target->rx_st_flags = 0; |
| |
| <------> |
| <------>while ((packet = htc_get_control_buf(target, false)) != NULL) { |
| <------><------>status = htc_add_rxbuf(target, packet); |
| <------><------>if (status) |
| <------><------><------>return status; |
| <------>} |
| |
| <------> |
| <------>ath6kl_credit_init(target->credit_info, &target->cred_dist_list, |
| <------><------><------> target->tgt_creds); |
| |
| <------>dump_cred_dist_stats(target); |
| |
| <------> |
| <------>status = htc_setup_tx_complete(target); |
| |
| <------>if (status) |
| <------><------>return status; |
| |
| <------> |
| <------>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; |
| } |
| |
| |
| static void ath6kl_htc_mbox_stop(struct htc_target *target) |
| { |
| <------>spin_lock_bh(&target->htc_lock); |
| <------>target->htc_flags |= HTC_OP_STATE_STOPPING; |
| <------>spin_unlock_bh(&target->htc_lock); |
| |
| <------> |
| <------> * Masking interrupts is a synchronous operation, when this |
| <------> * function returns all pending HIF I/O has completed, we can |
| <------> * safely flush the queues. |
| <------> */ |
| <------>ath6kl_hif_mask_intrs(target->dev); |
| |
| <------>ath6kl_htc_flush_txep_all(target); |
| |
| <------>ath6kl_htc_mbox_flush_rx_buf(target); |
| |
| <------>ath6kl_htc_reset(target); |
| } |
| |
| static void *ath6kl_htc_mbox_create(struct ath6kl *ar) |
| { |
| <------>struct htc_target *target = NULL; |
| <------>int status = 0; |
| |
| <------>target = kzalloc(sizeof(*target), GFP_KERNEL); |
| <------>if (!target) { |
| <------><------>ath6kl_err("unable to allocate memory\n"); |
| <------><------>return NULL; |
| <------>} |
| |
| <------>target->dev = kzalloc(sizeof(*target->dev), GFP_KERNEL); |
| <------>if (!target->dev) { |
| <------><------>ath6kl_err("unable to allocate memory\n"); |
| <------><------>kfree(target); |
| <------><------>return NULL; |
| <------>} |
| |
| <------>spin_lock_init(&target->htc_lock); |
| <------>spin_lock_init(&target->rx_lock); |
| <------>spin_lock_init(&target->tx_lock); |
| |
| <------>INIT_LIST_HEAD(&target->free_ctrl_txbuf); |
| <------>INIT_LIST_HEAD(&target->free_ctrl_rxbuf); |
| <------>INIT_LIST_HEAD(&target->cred_dist_list); |
| |
| <------>target->dev->ar = ar; |
| <------>target->dev->htc_cnxt = target; |
| <------>target->ep_waiting = ENDPOINT_MAX; |
| |
| <------>status = ath6kl_hif_setup(target->dev); |
| <------>if (status) |
| <------><------>goto err_htc_cleanup; |
| |
| <------>status = ath6kl_htc_reset(target); |
| <------>if (status) |
| <------><------>goto err_htc_cleanup; |
| |
| <------>return target; |
| |
| err_htc_cleanup: |
| <------>ath6kl_htc_mbox_cleanup(target); |
| |
| <------>return NULL; |
| } |
| |
| |
| static void ath6kl_htc_mbox_cleanup(struct htc_target *target) |
| { |
| <------>struct htc_packet *packet, *tmp_packet; |
| |
| <------>ath6kl_hif_cleanup_scatter(target->dev->ar); |
| |
| <------>list_for_each_entry_safe(packet, tmp_packet, |
| <------><------><------><------> &target->free_ctrl_txbuf, list) { |
| <------><------>list_del(&packet->list); |
| <------><------>kfree(packet->buf_start); |
| <------><------>kfree(packet); |
| <------>} |
| |
| <------>list_for_each_entry_safe(packet, tmp_packet, |
| <------><------><------><------> &target->free_ctrl_rxbuf, list) { |
| <------><------>list_del(&packet->list); |
| <------><------>kfree(packet->buf_start); |
| <------><------>kfree(packet); |
| <------>} |
| |
| <------>kfree(target->dev); |
| <------>kfree(target); |
| } |
| |
| static const struct ath6kl_htc_ops ath6kl_htc_mbox_ops = { |
| <------>.create = ath6kl_htc_mbox_create, |
| <------>.wait_target = ath6kl_htc_mbox_wait_target, |
| <------>.start = ath6kl_htc_mbox_start, |
| <------>.conn_service = ath6kl_htc_mbox_conn_service, |
| <------>.tx = ath6kl_htc_mbox_tx, |
| <------>.stop = ath6kl_htc_mbox_stop, |
| <------>.cleanup = ath6kl_htc_mbox_cleanup, |
| <------>.flush_txep = ath6kl_htc_mbox_flush_txep, |
| <------>.flush_rx_buf = ath6kl_htc_mbox_flush_rx_buf, |
| <------>.activity_changed = ath6kl_htc_mbox_activity_changed, |
| <------>.get_rxbuf_num = ath6kl_htc_mbox_get_rxbuf_num, |
| <------>.add_rxbuf_multiple = ath6kl_htc_mbox_add_rxbuf_multiple, |
| <------>.credit_setup = ath6kl_htc_mbox_credit_setup, |
| }; |
| |
| void ath6kl_htc_mbox_attach(struct ath6kl *ar) |
| { |
| <------>ar->htc_ops = &ath6kl_htc_mbox_ops; |
| } |
| |