From patchwork Fri Nov 18 19:22:42 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Erik Stromdahl X-Patchwork-Id: 9437249 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 CB9F760238 for ; Fri, 18 Nov 2016 19:24:57 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C2A0D29900 for ; Fri, 18 Nov 2016 19:24:57 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B777C299D3; Fri, 18 Nov 2016 19:24:57 +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=-4.1 required=2.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED,FREEMAIL_FROM,RCVD_IN_DNSWL_MED,T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 3701F29900 for ; Fri, 18 Nov 2016 19:24:57 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1c7omL-0006N6-E5; Fri, 18 Nov 2016 19:24:53 +0000 Received: from mail-qk0-x242.google.com ([2607:f8b0:400d:c09::242]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1c7om2-0005vP-9k for ath10k@lists.infradead.org; Fri, 18 Nov 2016 19:24:37 +0000 Received: by mail-qk0-x242.google.com with SMTP id n204so34262445qke.2 for ; Fri, 18 Nov 2016 11:24:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=DjDSVX5JfMn1A1oIdb6+r8/h4Atw6LXesmacZTv6cm0=; b=RfPhSLRfNhEF6XxlaWnVdQCXnGrlvRWGYR6EDzoJhhYI+JxWmzVOJgAr3Gal9GK8nv 2cde7pQPpENl0PUd75pL4rhYs5K+XolUKIUOgbPcpjPM/r83oZeZxKmUh6A0/pScslfA lq9rquM0UWBlnENUz5EehMl/ajrVOSdh6a5eCjCKZN28eLQp/NEwCR5DSERRUgurTPat 9IMR0MyNR91M9pGupvx6UQBK/0qk2Aa3WiKoVnb0UGoikad4Cx98V1Z4gquIzKSU9Le5 aBm/1zzy/ppsxhVxDfnMG6RLwe81MMlGeAMEbl8WjUsPhAQQQbYtCVULNO8C0JK1kwwL 0dig== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=DjDSVX5JfMn1A1oIdb6+r8/h4Atw6LXesmacZTv6cm0=; b=K67aiEaksVNjgdelZzRAtqN+9kY/8WAo7GeOYNbr9DaEIwP6lYhsDEU03Oj5ieB3Ge R4gT2M+5p2ntInOMu5N2tmG7Nc25iQ1/B219FyI5+tYJJYoUGAWiUKJo/1mgGFF6zw1H z5wMrJkWn7KXvy+OrxEPnZlBYPle2bhkejP8uvNRaXXGoVwJbR18o3jKrqOcNJw97vMV SW7AqpoQ0ELKxSSqufnGdzyzKZYUseh2XhKE4ERr6Ta3Id2yHU3j7B+RQpDI5mIcg/QH QJKAu6TjPE2sK+N260GaLZWkcypQyMB2EODJwKfH4biVL+nZJYojqCqt2ATVd9GIa4Yi gICQ== X-Gm-Message-State: AKaTC00cc4BsPzSclAY5NSb8t9axxMrK+T1/LoD7ge8tlRjCImdF5yPgOFDt8kfNtIxzjg== X-Received: by 10.46.69.11 with SMTP id s11mr813344lja.44.1479497052885; Fri, 18 Nov 2016 11:24:12 -0800 (PST) Received: from erik-desktop.lan (81-233-218-8-no25.tbcn.telia.com. [81.233.218.8]) by smtp.gmail.com with ESMTPSA id 23sm2623298ljf.48.2016.11.18.11.24.11 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 18 Nov 2016 11:24:12 -0800 (PST) From: Erik Stromdahl To: kvalo@qca.qualcomm.com, linux-wireless@vger.kernel.org, ath10k@lists.infradead.org Subject: [RFC v2 02/11] ath10k: htc: rx trailer lookahead support Date: Fri, 18 Nov 2016 20:22:42 +0100 Message-Id: <1479496971-19174-3-git-send-email-erik.stromdahl@gmail.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1479496971-19174-1-git-send-email-erik.stromdahl@gmail.com> References: <1479496971-19174-1-git-send-email-erik.stromdahl@gmail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20161118_112434_894391_3E553FA2 X-CRM114-Status: GOOD ( 15.81 ) X-BeenThere: ath10k@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Erik Stromdahl MIME-Version: 1.0 Sender: "ath10k" Errors-To: ath10k-bounces+patchwork-ath10k=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP 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 --- drivers/net/wireless/ath/ath10k/htc.c | 91 ++++++++++++++++++++++++++++++++- drivers/net/wireless/ath/ath10k/htc.h | 30 +++++++++-- 2 files changed, 116 insertions(+), 5 deletions(-) diff --git a/drivers/net/wireless/ath/ath10k/htc.c b/drivers/net/wireless/ath/ath10k/htc.c index 26b1e15..957e828 100644 --- a/drivers/net/wireless/ath/ath10k/htc.c +++ b/drivers/net/wireless/ath/ath10k/htc.c @@ -228,10 +228,74 @@ void ath10k_htc_tx_completion_handler(struct ath10k *ar, struct sk_buff *skb) 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_report_bundle *report, + int len, + enum ath10k_htc_ep_id eid, + void *next_lookaheads, + int *next_lookaheads_len) +{ + int bundle_cnt = len / sizeof(*report); + + if (!bundle_cnt || (bundle_cnt > HTC_HOST_MAX_MSG_PER_BUNDLE)) { + WARN_ON(1); + 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 *ar = htc->ar; int status = 0; @@ -272,6 +336,28 @@ 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: + status = ath10k_htc_process_lookahead_bundle(htc, + record->lookahead_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 +445,8 @@ 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 858e19f..b0f9cf3 100644 --- a/drivers/net/wireless/ath/ath10k/htc.h +++ b/drivers/net/wireless/ath/ath10k/htc.h @@ -50,6 +50,8 @@ * 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_report_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_report_bundle lookahead_bundle[0]; u8 pauload[0]; }; } __packed __aligned(4); @@ -359,6 +381,8 @@ 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