From patchwork Sun Oct 20 10:03:46 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kalle Valo X-Patchwork-Id: 11200779 X-Patchwork-Delegate: kvalo@adurom.com Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4CD941920 for ; Sun, 20 Oct 2019 10:05:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2A6982190F for ; Sun, 20 Oct 2019 10:05:35 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="h8j09/0m"; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="dWGa0eCM" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726485AbfJTKFe (ORCPT ); Sun, 20 Oct 2019 06:05:34 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:48170 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726352AbfJTKFe (ORCPT ); Sun, 20 Oct 2019 06:05:34 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id F165C61462; Sun, 20 Oct 2019 10:05:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1571565932; bh=jPh5bMZ78qUafzzg14PtehmE4YxOzUl/eCV5THsWXO4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=h8j09/0m16fonVCwkVZ8HE5TyzcApcvlZc+hpmah25dVyUNPwsfhslvLUQ6PCv6xB H1Sot5GFWvMAA/mk6Vuij/a4YgCUP2lrQdQqCrrAk1vvuxQZmscakgYky0QYbwq9G7 h7aDhwMIOTOqA/NrDVjE4NSRU7Z0SK04R4RAs0H4= X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on pdx-caf-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.7 required=2.0 tests=ALL_TRUSTED,BAYES_00, DKIM_INVALID,DKIM_SIGNED,SPF_NONE autolearn=no autolearn_force=no version=3.4.0 Received: from x230.adurom.net (88-114-240-156.elisa-laajakaista.fi [88.114.240.156]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: kvalo@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 63D106134F; Sun, 20 Oct 2019 10:05:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1571565917; bh=jPh5bMZ78qUafzzg14PtehmE4YxOzUl/eCV5THsWXO4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dWGa0eCM0pbtq+9cllo+Qmy7R3J4ZglWfwCwaBA+5pZDa5jbHJE1UZBFhD1XLEx8j TJDdPr4fmzxiPBDpzEjCDnKRRkTKYsHHkxCG2YKZS9BWJkWPLrP5RwehlsLG+sAkbK rwDK78UUADaKTJxLwILA9anm8/qfBvOadB6OLzfQ= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 63D106134F Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=kvalo@codeaurora.org From: Kalle Valo To: linux-wireless@vger.kernel.org Cc: ath11k@lists.infradead.org, devicetree@vger.kernel.org Subject: [PATCH v2 28/49] ath11k: add htc.c Date: Sun, 20 Oct 2019 13:03:46 +0300 Message-Id: <1571565847-10338-29-git-send-email-kvalo@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1571565847-10338-1-git-send-email-kvalo@codeaurora.org> References: <1571565847-10338-1-git-send-email-kvalo@codeaurora.org> Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org (patches split for easier review, see the cover letter for more) Signed-off-by: Kalle Valo --- drivers/net/wireless/ath/ath11k/htc.c | 773 ++++++++++++++++++++++++++++++++++ 1 file changed, 773 insertions(+) diff --git a/drivers/net/wireless/ath/ath11k/htc.c b/drivers/net/wireless/ath/ath11k/htc.c new file mode 100644 index 000000000000..9d4115f25ceb --- /dev/null +++ b/drivers/net/wireless/ath/ath11k/htc.c @@ -0,0 +1,773 @@ +// SPDX-License-Identifier: BSD-3-Clause-Clear +/* + * Copyright (c) 2018-2019 The Linux Foundation. All rights reserved. + */ +#include +#include + +#include "ahb.h" +#include "debug.h" + +struct sk_buff *ath11k_htc_alloc_skb(struct ath11k_base *ab, int size) +{ + struct sk_buff *skb; + + skb = dev_alloc_skb(size + sizeof(struct ath11k_htc_hdr)); + if (!skb) + return NULL; + + skb_reserve(skb, sizeof(struct ath11k_htc_hdr)); + + /* FW/HTC requires 4-byte aligned streams */ + if (!IS_ALIGNED((unsigned long)skb->data, 4)) + ath11k_warn(ab, "Unaligned HTC tx skb\n"); + + return skb; +} + +static void ath11k_htc_control_tx_complete(struct ath11k_base *ab, + struct sk_buff *skb) +{ + kfree_skb(skb); +} + +static struct sk_buff *ath11k_htc_build_tx_ctrl_skb(void *ab) +{ + struct sk_buff *skb; + struct ath11k_skb_cb *skb_cb; + + skb = dev_alloc_skb(ATH11K_HTC_CONTROL_BUFFER_SIZE); + if (!skb) + return NULL; + + skb_reserve(skb, sizeof(struct ath11k_htc_hdr)); + WARN_ON_ONCE(!IS_ALIGNED((unsigned long)skb->data, 4)); + + skb_cb = ATH11K_SKB_CB(skb); + memset(skb_cb, 0, sizeof(*skb_cb)); + + ath11k_dbg(ab, ATH11K_DBG_HTC, "%s: skb %pK\n", __func__, skb); + return skb; +} + +static inline void ath11k_htc_restore_tx_skb(struct ath11k_htc *htc, + struct sk_buff *skb) +{ + struct ath11k_skb_cb *skb_cb = ATH11K_SKB_CB(skb); + + dma_unmap_single(htc->ab->dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE); + skb_pull(skb, sizeof(struct ath11k_htc_hdr)); +} + +static void ath11k_htc_prepare_tx_skb(struct ath11k_htc_ep *ep, + struct sk_buff *skb) +{ + struct ath11k_htc_hdr *hdr; + + hdr = (struct ath11k_htc_hdr *)skb->data; + + memset(hdr, 0, sizeof(*hdr)); + hdr->htc_info = FIELD_PREP(HTC_HDR_ENDPOINTID, ep->eid) | + FIELD_PREP(HTC_HDR_PAYLOADLEN, + (skb->len - sizeof(*hdr))) | + FIELD_PREP(HTC_HDR_FLAGS, + ATH11K_HTC_FLAG_NEED_CREDIT_UPDATE); + + spin_lock_bh(&ep->htc->tx_lock); + hdr->ctrl_info = FIELD_PREP(HTC_HDR_CONTROLBYTES1, ep->seq_no++); + spin_unlock_bh(&ep->htc->tx_lock); +} + +int ath11k_htc_send(struct ath11k_htc *htc, + enum ath11k_htc_ep_id eid, + struct sk_buff *skb) +{ + struct ath11k_htc_ep *ep = &htc->endpoint[eid]; + struct ath11k_skb_cb *skb_cb = ATH11K_SKB_CB(skb); + struct device *dev = htc->ab->dev; + struct ath11k_base *ab = htc->ab; + int credits = 0; + int ret; + + if (eid >= ATH11K_HTC_EP_COUNT) { + ath11k_warn(ab, "Invalid endpoint id: %d\n", eid); + return -ENOENT; + } + + skb_push(skb, sizeof(struct ath11k_htc_hdr)); + + if (ep->tx_credit_flow_enabled) { + credits = DIV_ROUND_UP(skb->len, htc->target_credit_size); + spin_lock_bh(&htc->tx_lock); + if (ep->tx_credits < credits) { + ath11k_dbg(ab, ATH11K_DBG_HTC, + "htc insufficient credits ep %d required %d available %d\n", + eid, credits, ep->tx_credits); + spin_unlock_bh(&htc->tx_lock); + ret = -EAGAIN; + goto err_pull; + } + ep->tx_credits -= credits; + ath11k_dbg(ab, ATH11K_DBG_HTC, + "htc ep %d consumed %d credits (total %d)\n", + eid, credits, ep->tx_credits); + spin_unlock_bh(&htc->tx_lock); + } + + ath11k_htc_prepare_tx_skb(ep, skb); + + skb_cb->eid = eid; + skb_cb->paddr = dma_map_single(dev, skb->data, skb->len, DMA_TO_DEVICE); + ret = dma_mapping_error(dev, skb_cb->paddr); + if (ret) { + ret = -EIO; + goto err_credits; + } + + ret = ath11k_ce_send(htc->ab, skb, ep->ul_pipe_id, ep->eid); + if (ret) + goto err_unmap; + + return 0; + +err_unmap: + dma_unmap_single(dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE); +err_credits: + if (ep->tx_credit_flow_enabled) { + spin_lock_bh(&htc->tx_lock); + ep->tx_credits += credits; + ath11k_dbg(ab, ATH11K_DBG_HTC, + "htc ep %d reverted %d credits back (total %d)\n", + eid, credits, ep->tx_credits); + spin_unlock_bh(&htc->tx_lock); + + if (ep->ep_ops.ep_tx_credits) + ep->ep_ops.ep_tx_credits(htc->ab); + } +err_pull: + skb_pull(skb, sizeof(struct ath11k_htc_hdr)); + return ret; +} + +static void +ath11k_htc_process_credit_report(struct ath11k_htc *htc, + const struct ath11k_htc_credit_report *report, + int len, + enum ath11k_htc_ep_id eid) +{ + struct ath11k_base *ab = htc->ab; + struct ath11k_htc_ep *ep; + int i, n_reports; + + if (len % sizeof(*report)) + ath11k_warn(ab, "Uneven credit report len %d", len); + + n_reports = len / sizeof(*report); + + spin_lock_bh(&htc->tx_lock); + for (i = 0; i < n_reports; i++, report++) { + if (report->eid >= ATH11K_HTC_EP_COUNT) + break; + + ep = &htc->endpoint[report->eid]; + ep->tx_credits += report->credits; + + ath11k_dbg(ab, ATH11K_DBG_HTC, "htc ep %d got %d credits (total %d)\n", + report->eid, report->credits, ep->tx_credits); + + if (ep->ep_ops.ep_tx_credits) { + spin_unlock_bh(&htc->tx_lock); + ep->ep_ops.ep_tx_credits(htc->ab); + spin_lock_bh(&htc->tx_lock); + } + } + spin_unlock_bh(&htc->tx_lock); +} + +static int ath11k_htc_process_trailer(struct ath11k_htc *htc, + u8 *buffer, + int length, + enum ath11k_htc_ep_id src_eid) +{ + struct ath11k_base *ab = htc->ab; + int status = 0; + struct ath11k_htc_record *record; + size_t len; + + while (length > 0) { + record = (struct ath11k_htc_record *)buffer; + + if (length < sizeof(record->hdr)) { + status = -EINVAL; + break; + } + + if (record->hdr.len > length) { + /* no room left in buffer for record */ + ath11k_warn(ab, "Invalid record length: %d\n", + record->hdr.len); + status = -EINVAL; + break; + } + + switch (record->hdr.id) { + case ATH11K_HTC_RECORD_CREDITS: + len = sizeof(struct ath11k_htc_credit_report); + if (record->hdr.len < len) { + ath11k_warn(ab, "Credit report too long\n"); + status = -EINVAL; + break; + } + ath11k_htc_process_credit_report(htc, + record->credit_report, + record->hdr.len, + src_eid); + break; + default: + ath11k_warn(ab, "Unhandled record: id:%d length:%d\n", + record->hdr.id, record->hdr.len); + break; + } + + if (status) + break; + + /* multiple records may be present in a trailer */ + buffer += sizeof(record->hdr) + record->hdr.len; + length -= sizeof(record->hdr) + record->hdr.len; + } + + return status; +} + +void ath11k_htc_rx_completion_handler(struct ath11k_base *ab, + struct sk_buff *skb) +{ + int status = 0; + struct ath11k_htc *htc = &ab->htc; + struct ath11k_htc_hdr *hdr; + struct ath11k_htc_ep *ep; + u16 payload_len; + u32 trailer_len = 0; + size_t min_len; + u8 eid; + bool trailer_present; + + hdr = (struct ath11k_htc_hdr *)skb->data; + skb_pull(skb, sizeof(*hdr)); + + eid = FIELD_GET(HTC_HDR_ENDPOINTID, hdr->htc_info); + + if (eid >= ATH11K_HTC_EP_COUNT) { + ath11k_warn(ab, "HTC Rx: invalid eid %d\n", eid); + goto out; + } + + ep = &htc->endpoint[eid]; + + payload_len = FIELD_GET(HTC_HDR_PAYLOADLEN, hdr->htc_info); + + if (payload_len + sizeof(*hdr) > ATH11K_HTC_MAX_LEN) { + ath11k_warn(ab, "HTC rx frame too long, len: %zu\n", + payload_len + sizeof(*hdr)); + goto out; + } + + if (skb->len < payload_len) { + ath11k_warn(ab, "HTC Rx: insufficient length, got %d, expected %d\n", + skb->len, payload_len); + goto out; + } + + /* get flags to check for trailer */ + trailer_present = (FIELD_GET(HTC_HDR_FLAGS, hdr->htc_info)) & + ATH11K_HTC_FLAG_TRAILER_PRESENT; + + if (trailer_present) { + u8 *trailer; + + trailer_len = FIELD_GET(HTC_HDR_CONTROLBYTES0, hdr->ctrl_info); + min_len = sizeof(struct ath11k_htc_record_hdr); + + if ((trailer_len < min_len) || + (trailer_len > payload_len)) { + ath11k_warn(ab, "Invalid trailer length: %d\n", + trailer_len); + goto out; + } + + trailer = (u8 *)hdr; + trailer += sizeof(*hdr); + trailer += payload_len; + trailer -= trailer_len; + status = ath11k_htc_process_trailer(htc, trailer, + trailer_len, eid); + if (status) + goto out; + + skb_trim(skb, skb->len - trailer_len); + } + + if (trailer_len >= payload_len) + /* zero length packet with trailer data, just drop these */ + goto out; + + if (eid == ATH11K_HTC_EP_0) { + struct ath11k_htc_msg *msg = (struct ath11k_htc_msg *)skb->data; + + switch (FIELD_GET(HTC_MSG_MESSAGEID, msg->msg_svc_id)) { + case ATH11K_HTC_MSG_READY_ID: + case ATH11K_HTC_MSG_CONNECT_SERVICE_RESP_ID: + /* handle HTC control message */ + if (completion_done(&htc->ctl_resp)) { + /* this is a fatal error, target should not be + * sending unsolicited messages on the ep 0 + */ + ath11k_warn(ab, "HTC rx ctrl still processing\n"); + complete(&htc->ctl_resp); + goto out; + } + + htc->control_resp_len = + min_t(int, skb->len, + ATH11K_HTC_MAX_CTRL_MSG_LEN); + + memcpy(htc->control_resp_buffer, skb->data, + htc->control_resp_len); + + complete(&htc->ctl_resp); + break; + default: + ath11k_warn(ab, "ignoring unsolicited htc ep0 event\n"); + break; + } + goto out; + } + + ath11k_dbg(ab, ATH11K_DBG_HTC, "htc rx completion ep %d skb %pK\n", + eid, skb); + ep->ep_ops.ep_rx_complete(ab, skb); + + /* poll tx completion for interrupt disabled CE's */ + ath11k_ce_poll_send_completed(ab, ep->ul_pipe_id); + + /* skb is now owned by the rx completion handler */ + skb = NULL; +out: + kfree_skb(skb); +} + +static void ath11k_htc_control_rx_complete(struct ath11k_base *ab, + struct sk_buff *skb) +{ + /* This is unexpected. FW is not supposed to send regular rx on this + * endpoint. + */ + ath11k_warn(ab, "unexpected htc rx\n"); + kfree_skb(skb); +} + +static const char *htc_service_name(enum ath11k_htc_svc_id id) +{ + switch (id) { + case ATH11K_HTC_SVC_ID_RESERVED: + return "Reserved"; + case ATH11K_HTC_SVC_ID_RSVD_CTRL: + return "Control"; + case ATH11K_HTC_SVC_ID_WMI_CONTROL: + return "WMI"; + case ATH11K_HTC_SVC_ID_WMI_DATA_BE: + return "DATA BE"; + case ATH11K_HTC_SVC_ID_WMI_DATA_BK: + return "DATA BK"; + case ATH11K_HTC_SVC_ID_WMI_DATA_VI: + return "DATA VI"; + case ATH11K_HTC_SVC_ID_WMI_DATA_VO: + return "DATA VO"; + case ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1: + return "WMI MAC1"; + case ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2: + return "WMI MAC2"; + case ATH11K_HTC_SVC_ID_NMI_CONTROL: + return "NMI Control"; + case ATH11K_HTC_SVC_ID_NMI_DATA: + return "NMI Data"; + case ATH11K_HTC_SVC_ID_HTT_DATA_MSG: + return "HTT Data"; + case ATH11K_HTC_SVC_ID_TEST_RAW_STREAMS: + return "RAW"; + case ATH11K_HTC_SVC_ID_IPA_TX: + return "IPA TX"; + case ATH11K_HTC_SVC_ID_PKT_LOG: + return "PKT LOG"; + } + + return "Unknown"; +} + +static void ath11k_htc_reset_endpoint_states(struct ath11k_htc *htc) +{ + struct ath11k_htc_ep *ep; + int i; + + for (i = ATH11K_HTC_EP_0; i < ATH11K_HTC_EP_COUNT; i++) { + ep = &htc->endpoint[i]; + ep->service_id = ATH11K_HTC_SVC_ID_UNUSED; + ep->max_ep_message_len = 0; + ep->max_tx_queue_depth = 0; + ep->eid = i; + ep->htc = htc; + ep->tx_credit_flow_enabled = true; + } +} + +static u8 ath11k_htc_get_credit_allocation(struct ath11k_htc *htc, + u16 service_id) +{ + u8 i, allocation = 0; + + for (i = 0; i < ATH11K_HTC_MAX_SERVICE_ALLOC_ENTRIES; i++) { + if (htc->service_alloc_table[i].service_id == service_id) { + allocation = + htc->service_alloc_table[i].credit_allocation; + } + } + + return allocation; +} + +static int ath11k_htc_setup_target_buffer_assignments(struct ath11k_htc *htc) +{ + struct ath11k_htc_svc_tx_credits *serv_entry; + u32 svc_id[] = { + ATH11K_HTC_SVC_ID_WMI_CONTROL, + ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1, + ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2, + }; + int i, credits; + + credits = htc->total_transmit_credits; + serv_entry = htc->service_alloc_table; + + if ((htc->wmi_ep_count == 0) || + (htc->wmi_ep_count > ARRAY_SIZE(svc_id))) + return -EINVAL; + + /* Divide credits among number of endpoints for WMI */ + credits = credits / htc->wmi_ep_count; + for (i = 0; i < htc->wmi_ep_count; i++) { + serv_entry[i].service_id = svc_id[i]; + serv_entry[i].credit_allocation = credits; + } + + return 0; +} + +int ath11k_htc_wait_target(struct ath11k_htc *htc) +{ + int i, status = 0; + struct ath11k_base *ab = htc->ab; + unsigned long time_left; + struct ath11k_htc_ready *ready; + u16 message_id; + u16 credit_count; + u16 credit_size; + + time_left = wait_for_completion_timeout(&htc->ctl_resp, + ATH11K_HTC_WAIT_TIMEOUT_HZ); + if (!time_left) { + ath11k_warn(ab, "failed to receive control response completion, polling..\n"); + + for (i = 0; i < CE_COUNT; i++) + ath11k_ce_per_engine_service(htc->ab, i); + + time_left = + wait_for_completion_timeout(&htc->ctl_resp, + ATH11K_HTC_WAIT_TIMEOUT_HZ); + + if (!time_left) + status = -ETIMEDOUT; + } + + if (status < 0) { + ath11k_warn(ab, "ctl_resp never came in (%d)\n", status); + return status; + } + + if (htc->control_resp_len < sizeof(*ready)) { + ath11k_warn(ab, "Invalid HTC ready msg len:%d\n", + htc->control_resp_len); + return -ECOMM; + } + + ready = (struct ath11k_htc_ready *)htc->control_resp_buffer; + message_id = FIELD_GET(HTC_MSG_MESSAGEID, ready->id_credit_count); + credit_count = FIELD_GET(HTC_READY_MSG_CREDITCOUNT, + ready->id_credit_count); + credit_size = FIELD_GET(HTC_READY_MSG_CREDITSIZE, ready->size_ep); + + if (message_id != ATH11K_HTC_MSG_READY_ID) { + ath11k_warn(ab, "Invalid HTC ready msg: 0x%x\n", message_id); + return -ECOMM; + } + + htc->total_transmit_credits = credit_count; + htc->target_credit_size = credit_size; + + ath11k_dbg(ab, ATH11K_DBG_HTC, + "Target ready! transmit resources: %d size:%d\n", + htc->total_transmit_credits, htc->target_credit_size); + + if ((htc->total_transmit_credits == 0) || + (htc->target_credit_size == 0)) { + ath11k_warn(ab, "Invalid credit size received\n"); + return -ECOMM; + } + + ath11k_htc_setup_target_buffer_assignments(htc); + + return 0; +} + +int ath11k_htc_connect_service(struct ath11k_htc *htc, + struct ath11k_htc_svc_conn_req *conn_req, + struct ath11k_htc_svc_conn_resp *conn_resp) +{ + struct ath11k_base *ab = htc->ab; + struct ath11k_htc_conn_svc *req_msg; + struct ath11k_htc_conn_svc_resp resp_msg_dummy; + struct ath11k_htc_conn_svc_resp *resp_msg = &resp_msg_dummy; + enum ath11k_htc_ep_id assigned_eid = ATH11K_HTC_EP_COUNT; + struct ath11k_htc_ep *ep; + struct sk_buff *skb; + unsigned int max_msg_size = 0; + int length, status; + unsigned long time_left; + bool disable_credit_flow_ctrl = false; + u16 message_id, service_id, flags = 0; + u8 tx_alloc = 0; + + /* special case for HTC pseudo control service */ + if (conn_req->service_id == ATH11K_HTC_SVC_ID_RSVD_CTRL) { + disable_credit_flow_ctrl = true; + assigned_eid = ATH11K_HTC_EP_0; + max_msg_size = ATH11K_HTC_MAX_CTRL_MSG_LEN; + memset(&resp_msg_dummy, 0, sizeof(resp_msg_dummy)); + goto setup; + } + + tx_alloc = ath11k_htc_get_credit_allocation(htc, + conn_req->service_id); + if (!tx_alloc) + ath11k_dbg(ab, ATH11K_DBG_BOOT, + "boot htc service %s does not allocate target credits\n", + htc_service_name(conn_req->service_id)); + + skb = ath11k_htc_build_tx_ctrl_skb(htc->ab); + if (!skb) { + ath11k_warn(ab, "Failed to allocate HTC packet\n"); + return -ENOMEM; + } + + length = sizeof(*req_msg); + skb_put(skb, length); + memset(skb->data, 0, length); + + req_msg = (struct ath11k_htc_conn_svc *)skb->data; + req_msg->msg_svc_id = FIELD_PREP(HTC_MSG_MESSAGEID, + ATH11K_HTC_MSG_CONNECT_SERVICE_ID); + + flags |= FIELD_PREP(ATH11K_HTC_CONN_FLAGS_RECV_ALLOC, tx_alloc); + + /* Only enable credit flow control for WMI ctrl service */ + if (!(conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL || + conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC1 || + conn_req->service_id == ATH11K_HTC_SVC_ID_WMI_CONTROL_MAC2)) { + flags |= ATH11K_HTC_CONN_FLAGS_DISABLE_CREDIT_FLOW_CTRL; + disable_credit_flow_ctrl = true; + } + + req_msg->flags_len = FIELD_PREP(HTC_SVC_MSG_CONNECTIONFLAGS, flags); + req_msg->msg_svc_id |= FIELD_PREP(HTC_SVC_MSG_SERVICE_ID, + conn_req->service_id); + + reinit_completion(&htc->ctl_resp); + + status = ath11k_htc_send(htc, ATH11K_HTC_EP_0, skb); + if (status) { + kfree_skb(skb); + return status; + } + + /* wait for response */ + time_left = wait_for_completion_timeout(&htc->ctl_resp, + ATH11K_HTC_CONN_SVC_TIMEOUT_HZ); + if (!time_left) { + ath11k_err(ab, "Service connect timeout\n"); + return -ETIMEDOUT; + } + + /* we controlled the buffer creation, it's aligned */ + resp_msg = (struct ath11k_htc_conn_svc_resp *)htc->control_resp_buffer; + message_id = FIELD_GET(HTC_MSG_MESSAGEID, resp_msg->msg_svc_id); + service_id = FIELD_GET(HTC_SVC_RESP_MSG_SERVICEID, + resp_msg->msg_svc_id); + + if ((message_id != ATH11K_HTC_MSG_CONNECT_SERVICE_RESP_ID) || + (htc->control_resp_len < sizeof(*resp_msg))) { + ath11k_err(ab, "Invalid resp message ID 0x%x", message_id); + return -EPROTO; + } + + ath11k_dbg(ab, ATH11K_DBG_HTC, + "HTC Service %s connect response: status: 0x%lx, assigned ep: 0x%lx\n", + htc_service_name(service_id), + FIELD_GET(HTC_SVC_RESP_MSG_STATUS, resp_msg->flags_len), + FIELD_GET(HTC_SVC_RESP_MSG_ENDPOINTID, resp_msg->flags_len)); + + conn_resp->connect_resp_code = FIELD_GET(HTC_SVC_RESP_MSG_STATUS, + resp_msg->flags_len); + + /* check response status */ + if (conn_resp->connect_resp_code != ATH11K_HTC_CONN_SVC_STATUS_SUCCESS) { + ath11k_err(ab, "HTC Service %s connect request failed: 0x%x)\n", + htc_service_name(service_id), + conn_resp->connect_resp_code); + return -EPROTO; + } + + assigned_eid = (enum ath11k_htc_ep_id)FIELD_GET( + HTC_SVC_RESP_MSG_ENDPOINTID, + resp_msg->flags_len); + + max_msg_size = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE, + resp_msg->flags_len); + +setup: + + if (assigned_eid >= ATH11K_HTC_EP_COUNT) + return -EPROTO; + + if (max_msg_size == 0) + return -EPROTO; + + ep = &htc->endpoint[assigned_eid]; + ep->eid = assigned_eid; + + if (ep->service_id != ATH11K_HTC_SVC_ID_UNUSED) + return -EPROTO; + + /* return assigned endpoint to caller */ + conn_resp->eid = assigned_eid; + conn_resp->max_msg_len = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE, + resp_msg->flags_len); + + /* setup the endpoint */ + ep->service_id = conn_req->service_id; + ep->max_tx_queue_depth = conn_req->max_send_queue_depth; + ep->max_ep_message_len = FIELD_GET(HTC_SVC_RESP_MSG_MAXMSGSIZE, + resp_msg->flags_len); + ep->tx_credits = tx_alloc; + + /* copy all the callbacks */ + ep->ep_ops = conn_req->ep_ops; + + status = ath11k_ahb_map_service_to_pipe(htc->ab, + ep->service_id, + &ep->ul_pipe_id, + &ep->dl_pipe_id); + if (status) + return status; + + ath11k_dbg(ab, ATH11K_DBG_BOOT, + "boot htc service '%s' ul pipe %d dl pipe %d eid %d ready\n", + htc_service_name(ep->service_id), ep->ul_pipe_id, + ep->dl_pipe_id, ep->eid); + + if (disable_credit_flow_ctrl && ep->tx_credit_flow_enabled) { + ep->tx_credit_flow_enabled = false; + ath11k_dbg(ab, ATH11K_DBG_BOOT, + "boot htc service '%s' eid %d TX flow control disabled\n", + htc_service_name(ep->service_id), assigned_eid); + } + + return status; +} + +int ath11k_htc_start(struct ath11k_htc *htc) +{ + struct sk_buff *skb; + int status = 0; + struct ath11k_base *ab = htc->ab; + struct ath11k_htc_setup_complete_extended *msg; + + skb = ath11k_htc_build_tx_ctrl_skb(htc->ab); + if (!skb) + return -ENOMEM; + + skb_put(skb, sizeof(*msg)); + memset(skb->data, 0, skb->len); + + msg = (struct ath11k_htc_setup_complete_extended *)skb->data; + msg->msg_id = FIELD_PREP(HTC_MSG_MESSAGEID, + ATH11K_HTC_MSG_SETUP_COMPLETE_EX_ID); + + ath11k_dbg(ab, ATH11K_DBG_HTC, "HTC is using TX credit flow control\n"); + + status = ath11k_htc_send(htc, ATH11K_HTC_EP_0, skb); + if (status) { + kfree_skb(skb); + return status; + } + + return 0; +} + +int ath11k_htc_init(struct ath11k_base *ab) +{ + struct ath11k_htc *htc = &ab->htc; + struct ath11k_htc_svc_conn_req conn_req; + struct ath11k_htc_svc_conn_resp conn_resp; + int ret; + + spin_lock_init(&htc->tx_lock); + + ath11k_htc_reset_endpoint_states(htc); + + htc->ab = ab; + + switch (ab->wmi_sc.preferred_hw_mode) { + case WMI_HOST_HW_MODE_SINGLE: + htc->wmi_ep_count = 1; + break; + case WMI_HOST_HW_MODE_DBS: + case WMI_HOST_HW_MODE_DBS_OR_SBS: + htc->wmi_ep_count = 2; + break; + case WMI_HOST_HW_MODE_DBS_SBS: + htc->wmi_ep_count = 3; + break; + default: + htc->wmi_ep_count = 3; + break; + } + + /* setup our pseudo HTC control endpoint connection */ + memset(&conn_req, 0, sizeof(conn_req)); + memset(&conn_resp, 0, sizeof(conn_resp)); + conn_req.ep_ops.ep_tx_complete = ath11k_htc_control_tx_complete; + conn_req.ep_ops.ep_rx_complete = ath11k_htc_control_rx_complete; + conn_req.max_send_queue_depth = ATH11K_NUM_CONTROL_TX_BUFFERS; + conn_req.service_id = ATH11K_HTC_SVC_ID_RSVD_CTRL; + + /* connect fake service */ + ret = ath11k_htc_connect_service(htc, &conn_req, &conn_resp); + if (ret) { + ath11k_err(ab, "could not connect to htc service (%d)\n", ret); + return ret; + } + + init_completion(&htc->ctl_resp); + + return 0; +}