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