From patchwork Sun Jun 14 14:28:33 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Cave-Ayland X-Patchwork-Id: 1308957 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=ilande.co.uk Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 49lHBz3PVqz9sR4 for ; Mon, 15 Jun 2020 00:38:35 +1000 (AEST) Received: from localhost ([::1]:56938 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jkTmL-00048n-8D for incoming@patchwork.ozlabs.org; Sun, 14 Jun 2020 10:38:33 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:52058) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jkTeV-0008BJ-9A; Sun, 14 Jun 2020 10:30:27 -0400 Received: from mail.ilande.co.uk ([2001:41c9:1:41f::167]:38446 helo=mail.default.ilande.uk0.bigv.io) by eggs.gnu.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jkTeT-0005PO-K2; Sun, 14 Jun 2020 10:30:26 -0400 Received: from host217-39-64-113.range217-39.btcentralplus.com ([217.39.64.113] helo=kentang.home) by mail.default.ilande.uk0.bigv.io with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1jkTeM-0006Hv-Po; Sun, 14 Jun 2020 15:30:23 +0100 From: Mark Cave-Ayland To: qemu-devel@nongnu.org, qemu-ppc@nongnu.org, laurent@vivier.eu, fthain@telegraphics.com.au Date: Sun, 14 Jun 2020 15:28:33 +0100 Message-Id: <20200614142840.10245-16-mark.cave-ayland@ilande.co.uk> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200614142840.10245-1-mark.cave-ayland@ilande.co.uk> References: <20200614142840.10245-1-mark.cave-ayland@ilande.co.uk> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 217.39.64.113 X-SA-Exim-Mail-From: mark.cave-ayland@ilande.co.uk Subject: [PATCH 15/22] adb: add autopoll_blocked variable to block autopoll X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on mail.default.ilande.uk0.bigv.io) Received-SPF: pass client-ip=2001:41c9:1:41f::167; envelope-from=mark.cave-ayland@ilande.co.uk; helo=mail.default.ilande.uk0.bigv.io X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Whilst autopoll is enabled it is necessary to prevent the ADB buffer contents from being overwritten until the host has read back the response in its entirety. Add adb_autopoll_block() and adb_autopoll_unblock() functions in preparation for ensuring that the ADB buffer contents are protected for explicit ADB requests. Signed-off-by: Mark Cave-Ayland --- hw/input/adb.c | 21 +++++++++++++++++++++ include/hw/input/adb.h | 4 ++++ 2 files changed, 25 insertions(+) diff --git a/hw/input/adb.c b/hw/input/adb.c index b3ad7c5fca..70aa1f4570 100644 --- a/hw/input/adb.c +++ b/hw/input/adb.c @@ -157,6 +157,26 @@ void adb_set_autopoll_mask(ADBBusState *s, uint16_t mask) } } +void adb_autopoll_block(ADBBusState *s) +{ + s->autopoll_blocked = true; + + if (s->autopoll_enabled) { + timer_del(s->autopoll_timer); + } +} + +void adb_autopoll_unblock(ADBBusState *s) +{ + s->autopoll_blocked = false; + + if (s->autopoll_enabled) { + timer_mod(s->autopoll_timer, + qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + + s->autopoll_rate_ms); + } +} + static void adb_autopoll(void *opaque) { ADBBusState *s = opaque; @@ -184,6 +204,7 @@ static const VMStateDescription vmstate_adb_bus = { VMSTATE_BOOL(autopoll_enabled, ADBBusState), VMSTATE_UINT8(autopoll_rate_ms, ADBBusState), VMSTATE_UINT16(autopoll_mask, ADBBusState), + VMSTATE_BOOL(autopoll_blocked, ADBBusState), VMSTATE_END_OF_LIST() } }; diff --git a/include/hw/input/adb.h b/include/hw/input/adb.h index cff264739c..bb75a7b1e3 100644 --- a/include/hw/input/adb.h +++ b/include/hw/input/adb.h @@ -86,6 +86,7 @@ struct ADBBusState { QEMUTimer *autopoll_timer; bool autopoll_enabled; + bool autopoll_blocked; uint8_t autopoll_rate_ms; uint16_t autopoll_mask; void (*autopoll_cb)(void *opaque); @@ -96,6 +97,9 @@ int adb_request(ADBBusState *s, uint8_t *buf_out, const uint8_t *buf, int len); int adb_poll(ADBBusState *s, uint8_t *buf_out, uint16_t poll_mask); +void adb_autopoll_block(ADBBusState *s); +void adb_autopoll_unblock(ADBBusState *s); + void adb_set_autopoll_enabled(ADBBusState *s, bool enabled); void adb_set_autopoll_rate_ms(ADBBusState *s, int rate_ms); void adb_set_autopoll_mask(ADBBusState *s, uint16_t mask);