From patchwork Wed Mar 15 14:46:40 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kalle Valo X-Patchwork-Id: 9625859 X-Patchwork-Delegate: kvalo@adurom.com Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id DEACA6048C for ; Wed, 15 Mar 2017 14:47:02 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D12E225223 for ; Wed, 15 Mar 2017 14:47:02 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C65842807B; Wed, 15 Mar 2017 14:47:02 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 56E4526B41 for ; Wed, 15 Mar 2017 14:47:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753492AbdCOOrB (ORCPT ); Wed, 15 Mar 2017 10:47:01 -0400 Received: from wolverine02.qualcomm.com ([199.106.114.251]:43852 "EHLO wolverine02.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752577AbdCOOqw (ORCPT ); Wed, 15 Mar 2017 10:46:52 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=qca.qualcomm.com; i=@qca.qualcomm.com; q=dns/txt; s=qcdkim; t=1489589211; x=1521125211; h=subject:from:to:cc:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=oy+TABy+wXb5nsU45Vv0c7hvY8jiev1B+7o1WmE4XKk=; b=FhHBZqTGjq2U3A9bpKAFP3qajpeB+qn0tP5zI/4qzCzfa7mn0Ld153K2 TG1gpXWXPmytxoMnav+0kRh+mO5k2Q7ZA0o5OW1gewRSJ6TsqNKN9mKtw FroDCZYKOOS1AGmCG1kLjEpdEMAzR+nb1AB25CQ9jF5ao82TRgULGEtZu Q=; X-IronPort-AV: E=Sophos;i="5.36,169,1486454400"; d="scan'208";a="366190873" Received: from unknown (HELO ironmsg02-L.qualcomm.com) ([10.53.140.109]) by wolverine02.qualcomm.com with ESMTP; 15 Mar 2017 07:46:51 -0700 X-IronPort-AV: E=McAfee;i="5800,7501,8467"; a="885533290" X-MGA-submission: =?us-ascii?q?MDFk56bkzOLMluzuYkztlVYD1WoCUxCS2eCV9x?= =?us-ascii?q?TuWxpncYACxrL5wJJvB2VMmUuG8mIBnkbfKtUaaNz67Xr6DWyOzAgVr4?= =?us-ascii?q?VyUZ8wOSFFvcWItvc6dxVBw+fl2s8lwjBilPedV2WC2+cNWQ457dTgwr?= =?us-ascii?q?5G?= Received: from nasanexm01b.na.qualcomm.com ([10.85.0.82]) by ironmsg02-L.qualcomm.com with ESMTP/TLS/RC4-SHA; 15 Mar 2017 07:46:50 -0700 Received: from euamsexm01a.eu.qualcomm.com (10.251.127.40) by NASANEXM01B.na.qualcomm.com (10.85.0.82) with Microsoft SMTP Server (TLS) id 15.0.1178.4; Wed, 15 Mar 2017 07:46:50 -0700 Received: from potku.adurom.net (10.80.80.8) by euamsexm01a.eu.qualcomm.com (10.251.127.40) with Microsoft SMTP Server (TLS) id 15.0.1178.4; Wed, 15 Mar 2017 15:46:45 +0100 Subject: [PATCH v5 02/10] ath10k: htc: rx trailer lookahead support From: Kalle Valo To: CC: Date: Wed, 15 Mar 2017 16:46:40 +0200 Message-ID: <148958920008.25727.7217284876656924771.stgit@potku.adurom.net> In-Reply-To: <148958913141.25727.15769281552095255609.stgit@potku.adurom.net> References: <148958913141.25727.15769281552095255609.stgit@potku.adurom.net> User-Agent: StGit/0.17.1-17-ge4e0 MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: NASANEXM01G.na.qualcomm.com (10.85.0.33) To euamsexm01a.eu.qualcomm.com (10.251.127.40) Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Erik Stromdahl The RX trailer parsing is now capable of parsing lookahead reports. A lookahead contains the first 4 bytes of the next HTC message (that will be read in the next SDIO read operation). Lookaheads are used by the SDIO/mbox HIF layer to determine if the next message is part of a bundle, which endpoint it belongs to and how long it is. Signed-off-by: Erik Stromdahl Signed-off-by: Kalle Valo --- drivers/net/wireless/ath/ath10k/htc.c | 95 ++++++++++++++++++++++++++++++++- drivers/net/wireless/ath/ath10k/htc.h | 30 +++++++++- 2 files changed, 120 insertions(+), 5 deletions(-) diff --git a/drivers/net/wireless/ath/ath10k/htc.c b/drivers/net/wireless/ath/ath10k/htc.c index 35e67c46e027..fd5be4484984 100644 --- a/drivers/net/wireless/ath/ath10k/htc.c +++ b/drivers/net/wireless/ath/ath10k/htc.c @@ -228,11 +228,78 @@ ath10k_htc_process_credit_report(struct ath10k_htc *htc, spin_unlock_bh(&htc->tx_lock); } +static int +ath10k_htc_process_lookahead(struct ath10k_htc *htc, + const struct ath10k_htc_lookahead_report *report, + int len, + enum ath10k_htc_ep_id eid, + void *next_lookaheads, + int *next_lookaheads_len) +{ + struct ath10k *ar = htc->ar; + + /* Invalid lookahead flags are actually transmitted by + * the target in the HTC control message. + * Since this will happen at every boot we silently ignore + * the lookahead in this case + */ + if (report->pre_valid != ((~report->post_valid) & 0xFF)) + return 0; + + if (next_lookaheads && next_lookaheads_len) { + ath10k_dbg(ar, ATH10K_DBG_HTC, + "htc rx lookahead found pre_valid 0x%x post_valid 0x%x\n", + report->pre_valid, report->post_valid); + + /* look ahead bytes are valid, copy them over */ + memcpy((u8 *)next_lookaheads, report->lookahead, 4); + + *next_lookaheads_len = 1; + } + + return 0; +} + +static int +ath10k_htc_process_lookahead_bundle(struct ath10k_htc *htc, + const struct ath10k_htc_lookahead_bundle *report, + int len, + enum ath10k_htc_ep_id eid, + void *next_lookaheads, + int *next_lookaheads_len) +{ + struct ath10k *ar = htc->ar; + int bundle_cnt = len / sizeof(*report); + + if (!bundle_cnt || (bundle_cnt > HTC_HOST_MAX_MSG_PER_BUNDLE)) { + ath10k_warn(ar, "Invalid lookahead bundle count: %d\n", + bundle_cnt); + return -EINVAL; + } + + if (next_lookaheads && next_lookaheads_len) { + int i; + + for (i = 0; i < bundle_cnt; i++) { + memcpy(((u8 *)next_lookaheads) + 4 * i, + report->lookahead, 4); + report++; + } + + *next_lookaheads_len = bundle_cnt; + } + + return 0; +} + int ath10k_htc_process_trailer(struct ath10k_htc *htc, u8 *buffer, int length, - enum ath10k_htc_ep_id src_eid) + enum ath10k_htc_ep_id src_eid, + void *next_lookaheads, + int *next_lookaheads_len) { + struct ath10k_htc_lookahead_bundle *bundle; struct ath10k *ar = htc->ar; int status = 0; struct ath10k_htc_record *record; @@ -272,6 +339,29 @@ int ath10k_htc_process_trailer(struct ath10k_htc *htc, record->hdr.len, src_eid); break; + case ATH10K_HTC_RECORD_LOOKAHEAD: + len = sizeof(struct ath10k_htc_lookahead_report); + if (record->hdr.len < len) { + ath10k_warn(ar, "Lookahead report too long\n"); + status = -EINVAL; + break; + } + status = ath10k_htc_process_lookahead(htc, + record->lookahead_report, + record->hdr.len, + src_eid, + next_lookaheads, + next_lookaheads_len); + break; + case ATH10K_HTC_RECORD_LOOKAHEAD_BUNDLE: + bundle = record->lookahead_bundle; + status = ath10k_htc_process_lookahead_bundle(htc, + bundle, + record->hdr.len, + src_eid, + next_lookaheads, + next_lookaheads_len); + break; default: ath10k_warn(ar, "Unhandled record: id:%d length:%d\n", record->hdr.id, record->hdr.len); @@ -359,7 +449,8 @@ void ath10k_htc_rx_completion_handler(struct ath10k *ar, struct sk_buff *skb) trailer += payload_len; trailer -= trailer_len; status = ath10k_htc_process_trailer(htc, trailer, - trailer_len, hdr->eid); + trailer_len, hdr->eid, + NULL, NULL); if (status) goto out; diff --git a/drivers/net/wireless/ath/ath10k/htc.h b/drivers/net/wireless/ath/ath10k/htc.h index f728ce7124cf..ae6003495649 100644 --- a/drivers/net/wireless/ath/ath10k/htc.h +++ b/drivers/net/wireless/ath/ath10k/htc.h @@ -50,6 +50,8 @@ struct ath10k; * 4-byte aligned. */ +#define HTC_HOST_MAX_MSG_PER_BUNDLE 8 + enum ath10k_htc_tx_flags { ATH10K_HTC_FLAG_NEED_CREDIT_UPDATE = 0x01, ATH10K_HTC_FLAG_SEND_BUNDLE = 0x02 @@ -174,8 +176,10 @@ struct ath10k_htc_msg { } __packed __aligned(4); enum ath10k_ath10k_htc_record_id { - ATH10K_HTC_RECORD_NULL = 0, - ATH10K_HTC_RECORD_CREDITS = 1 + ATH10K_HTC_RECORD_NULL = 0, + ATH10K_HTC_RECORD_CREDITS = 1, + ATH10K_HTC_RECORD_LOOKAHEAD = 2, + ATH10K_HTC_RECORD_LOOKAHEAD_BUNDLE = 3, }; struct ath10k_ath10k_htc_record_hdr { @@ -192,10 +196,28 @@ struct ath10k_htc_credit_report { u8 pad1; } __packed; +struct ath10k_htc_lookahead_report { + u8 pre_valid; + u8 pad0; + u8 pad1; + u8 pad2; + u8 lookahead[4]; + u8 post_valid; + u8 pad3; + u8 pad4; + u8 pad5; +} __packed; + +struct ath10k_htc_lookahead_bundle { + u8 lookahead[4]; +} __packed; + struct ath10k_htc_record { struct ath10k_ath10k_htc_record_hdr hdr; union { struct ath10k_htc_credit_report credit_report[0]; + struct ath10k_htc_lookahead_report lookahead_report[0]; + struct ath10k_htc_lookahead_bundle lookahead_bundle[0]; u8 pauload[0]; }; } __packed __aligned(4); @@ -356,6 +378,8 @@ void ath10k_htc_notify_tx_completion(struct ath10k_htc_ep *ep, int ath10k_htc_process_trailer(struct ath10k_htc *htc, u8 *buffer, int length, - enum ath10k_htc_ep_id src_eid); + enum ath10k_htc_ep_id src_eid, + void *next_lookaheads, + int *next_lookaheads_len); #endif