From patchwork Mon Jun 30 08:53:09 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Thompson X-Patchwork-Id: 4446781 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id BCBFBBEEAA for ; Mon, 30 Jun 2014 09:04:01 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C0CC3202FE for ; Mon, 30 Jun 2014 09:04:00 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id F27CD202F8 for ; Mon, 30 Jun 2014 09:03:59 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1X1XT2-0003Wv-T3; Mon, 30 Jun 2014 09:01:40 +0000 Received: from mail-wi0-f177.google.com ([209.85.212.177]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1X1XT0-0003N2-2G for linux-arm-kernel@lists.infradead.org; Mon, 30 Jun 2014 09:01:38 +0000 Received: by mail-wi0-f177.google.com with SMTP id r20so5592752wiv.10 for ; Mon, 30 Jun 2014 02:01:15 -0700 (PDT) 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=zeHsyqj2aAf+hpHxJDtm6FtTUTcY8L5wuv6/PWthhS8=; b=ZHVL7doUq3ga1s55aoSqdo8r1eEl3UVo119lRQAkpgmTFCObEXb8MhaIw1XKnm+6t8 kjZfNnyMzZ/3rQN4LtQtH1BQEaEAszaUIJepZYy6VD1HDHlO7QM1MSr80Wb9B0DsGP59 efLqAg2TeuMdqtlBdRtA/ft363+8yWmhFKn3u6cT0qJ0YtV99PuEn8H96o99FUlHuZLR /W0ivO1597yZix+g5edhsZKv+8smXiCQRyb6srYzwhVAuo5x2pyJDuZ6d15nUeZjPyTL A9IuLBmmev19YSUwJ8mrc+k9amZVJw7Ndyb51NQjqwjtRtD482AD1qOZtEa1pVuzQD0G dzww== X-Gm-Message-State: ALoCoQm7FNmj/cwMsfvdC0oqs3ULI0By91uTl4QTBXCXTEgxr+q15q6Jjh42mC/1Yhk7vsuv8K0T X-Received: by 10.194.237.135 with SMTP id vc7mr2746263wjc.86.1404118875453; Mon, 30 Jun 2014 02:01:15 -0700 (PDT) Received: from sundance.lan (cpc4-aztw19-0-0-cust157.18-1.cable.virginm.net. [82.33.25.158]) by mx.google.com with ESMTPSA id l5sm28993317wif.22.2014.06.30.02.01.13 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 30 Jun 2014 02:01:14 -0700 (PDT) From: Daniel Thompson To: Russell King Subject: [PATCH v7 2/4] arm: fiq: Allow EOI to be communicated to the intc Date: Mon, 30 Jun 2014 09:53:09 +0100 Message-Id: <1404118391-3850-3-git-send-email-daniel.thompson@linaro.org> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1404118391-3850-1-git-send-email-daniel.thompson@linaro.org> References: <1403623097-1153-1-git-send-email-daniel.thompson@linaro.org> <1404118391-3850-1-git-send-email-daniel.thompson@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140630_020138_251408_6ADE35BB X-CRM114-Status: GOOD ( 12.69 ) X-Spam-Score: -0.7 (/) Cc: Daniel Thompson , linaro-kernel@lists.linaro.org, Catalin Marinas , patches@linaro.org, kgdb-bugreport@lists.sourceforge.net, Linus Walleij , Nicolas Pitre , linux-kernel@vger.kernel.org, Frederic Weisbecker , Anton Vorontsov , Ben Dooks , John Stultz , Fabio Estevam , Colin Cross , kernel-team@android.com, Dave Martin , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Modern ARM systems require an EOI to be sent to the interrupt controller on completion of both IRQ and FIQ. The FIQ code currently does not provide any API to perform this. This patch provides this API, implemented by adding a callback to the fiq_chip structure. Signed-off-by: Daniel Thompson Acked-by: Nicolas Pitre Cc: Russell King Cc: Fabio Estevam --- arch/arm/include/asm/fiq.h | 6 ++++++ arch/arm/kernel/fiq.c | 9 +++++++++ 2 files changed, 15 insertions(+) diff --git a/arch/arm/include/asm/fiq.h b/arch/arm/include/asm/fiq.h index ed44528..fbc0df1 100644 --- a/arch/arm/include/asm/fiq.h +++ b/arch/arm/include/asm/fiq.h @@ -22,6 +22,11 @@ struct fiq_chip { void (*fiq_enable)(struct irq_data *data); void (*fiq_disable)(struct irq_data *data); + + /* .fiq_eoi() will be called from the FIQ handler. For this + * reason it must not use spin locks (or any other locks). + */ + void (*fiq_eoi)(struct irq_data *data); }; struct fiq_handler { @@ -44,6 +49,7 @@ extern void release_fiq(struct fiq_handler *f); extern void set_fiq_handler(void *start, unsigned int length); extern void enable_fiq(int fiq); extern void disable_fiq(int fiq); +extern void eoi_fiq(int fiq); extern bool has_fiq(int fiq); extern void fiq_register_mapping(int irq, struct fiq_chip *chip); diff --git a/arch/arm/kernel/fiq.c b/arch/arm/kernel/fiq.c index 5d831cf..c35fd6a 100644 --- a/arch/arm/kernel/fiq.c +++ b/arch/arm/kernel/fiq.c @@ -183,6 +183,15 @@ void disable_fiq(int fiq) disable_irq(fiq + fiq_start); } +void eoi_fiq(int fiq) +{ + struct fiq_data *data = lookup_fiq_data(fiq); + + if (data && data->fiq_chip->fiq_eoi) + data->fiq_chip->fiq_eoi(data->irq_data); +} +EXPORT_SYMBOL(eoi_fiq); + bool has_fiq(int fiq) { struct fiq_data *data = lookup_fiq_data(fiq);