From nobody Thu Dec 18 21:47:53 2025 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0B33E195B21; Fri, 14 Jun 2024 10:25:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718360726; cv=none; b=mLu1JFHVERLCqi9buENS6rddctlk6k6ajQHMEzqKuKDFvFbSmhQly8xfzN5FfGQEl5JOyamSznXkHUkvuclqqbUWxTU3MvvwkmJhBVqkoSKWwiA7GW4+/DaAG5udm/OilClvhezbVMf1/ZHJPAADjomOJCWaoEgGjZbW8B6h0/0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718360726; c=relaxed/simple; bh=Xajq4UsK70Vujz3qaEzh61ETJnQa6GsiINQgyoMqBKI=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=E+JgtsRQSe9PKVACgV60XTAmdkZMuBpjNimbb3BnlIIi03QHza0EddIqFqEO2VWTyQ7LIuUMr76vHsj/yUpoWAPM4GMiylcdXD+dO97I8GzvYJ9DUkwtGYmVEK9clLz6wrNA913lQANjITzNvavKZzJVAX3okmjtBh+IxHEXl0s= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=hLewYcJi; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=UZCm5SSc; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="hLewYcJi"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="UZCm5SSc" From: Shivamurthy Shastri DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1718360723; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=PVKnDq5RP74qEIntN4x/BI6MJXtMmXAhy4Q5IiI19U0=; b=hLewYcJiU0KJRnfdmmxSgO2k9vnl6gYnmv0q/sbzuTfoNFCylqB0vPJ0KkIPDLiNnF37kx uaEM+gGrDMR13wdvtAETpNHRtTHXZ2Q+vjO8Ay0DNNOQ8l1DGJQHk0UCS4WC0hBlNxDhM0 aWqda+reatvn4/C4Zpk3rqX8iSLtAUuOea9tHF2LQc3Da6pjOorIhKQdD0WC1XBjxerqUf FLA9+1P9edUzzYI8hRmvw1bwZbRntc2yCfejWGOuZqJGPFagarz+uTK9O0Jy/aEAkYIUZn qizsn5hwYio8QTXd0t9Xskl6ZHsWovsktLh6qitXcMnZdIa3erUGhK8eg9iHYg== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1718360723; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=PVKnDq5RP74qEIntN4x/BI6MJXtMmXAhy4Q5IiI19U0=; b=UZCm5SSc3r/V98bpoVWD0fGR/2M1X6fAApHNeWw1e00My5x+1K4QJ0rwDWP6ynR7TFSnnW IOflkMmeVzAuxgCA== To: linux-kernel@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org, linux-pci@vger.kernel.org, maz@kernel.org, tglx@linutronix.de, anna-maria@linutronix.de, shawnguo@kernel.org, s.hauer@pengutronix.de, festevam@gmail.com, bhelgaas@google.com, rdunlap@infradead.org, vidyas@nvidia.com, ilpo.jarvinen@linux.intel.com, apatel@ventanamicro.com, kevin.tian@intel.com, nipun.gupta@amd.com, den@valinux.co.jp, andrew@lunn.ch, gregory.clement@bootlin.com, sebastian.hesselbarth@gmail.com, gregkh@linuxfoundation.org, rafael@kernel.org, alex.williamson@redhat.com, will@kernel.org, lorenzo.pieralisi@arm.com, jgg@mellanox.com, ammarfaizi2@gnuweeb.org, robin.murphy@arm.com, lpieralisi@kernel.org, nm@ti.com, kristo@kernel.org, vkoul@kernel.org, okaya@kernel.org, agross@kernel.org, andersson@kernel.org, mark.rutland@arm.com, shameerali.kolothum.thodi@huawei.com, yuzenghui@huawei.com, shivamurthy.shastri@linutronix.de Subject: [PATCH v3 08/24] irqchip/irq-msi-lib: Prepare for DEVICE MSI to replace platform MSI Date: Fri, 14 Jun 2024 12:23:47 +0200 Message-Id: <20240614102403.13610-9-shivamurthy.shastri@linutronix.de> In-Reply-To: <20240614102403.13610-1-shivamurthy.shastri@linutronix.de> References: <20240614102403.13610-1-shivamurthy.shastri@linutronix.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Thomas Gleixner Add the prerequisites for DEVICE MSI into the shared select() and child domain init function. These domains are really trivial and just provide a custom irq chip callback to write the MSI message. Signed-off-by: Thomas Gleixner Signed-off-by: Anna-Maria Behnsen Signed-off-by: Shivamurthy Shastri --- v3: adopted to IMS->MSI rename --- drivers/irqchip/irq-msi-lib.c | 13 +++++++++++++ drivers/irqchip/irq-msi-lib.h | 2 ++ 2 files changed, 15 insertions(+) diff --git a/drivers/irqchip/irq-msi-lib.c b/drivers/irqchip/irq-msi-lib.c index 0b359c5d8c6c..6aa4974d2d12 100644 --- a/drivers/irqchip/irq-msi-lib.c +++ b/drivers/irqchip/irq-msi-lib.c @@ -53,6 +53,19 @@ bool msi_lib_init_dev_msi_info(struct device *dev, struc= t irq_domain *domain, if (WARN_ON_ONCE(!IS_ENABLED(CONFIG_PCI_MSI))) return false; =20 + break; + case DOMAIN_BUS_DEVICE_MSI: + /* + * Per device MSI should never have any MSI feature bits + * set. It's sole purpose is to create a dumb interrupt + * chip which has a device specific irq_write_msi_msg() + * callback. + */ + if (WARN_ON_ONCE(info->flags)) + return false; + + /* Core managed MSI descriptors */ + info->flags =3D MSI_FLAG_ALLOC_SIMPLE_MSI_DESCS | MSI_FLAG_FREE_MSI_DESC= S; break; default: /* diff --git a/drivers/irqchip/irq-msi-lib.h b/drivers/irqchip/irq-msi-lib.h index 525aa5284a99..681ceabb7bc7 100644 --- a/drivers/irqchip/irq-msi-lib.h +++ b/drivers/irqchip/irq-msi-lib.h @@ -15,6 +15,8 @@ #define MATCH_PCI_MSI (0) #endif =20 +#define MATCH_PLATFORM_MSI BIT(DOMAIN_BUS_PLATFORM_MSI) + int msi_lib_irq_domain_select(struct irq_domain *d, struct irq_fwspec *fws= pec, enum irq_domain_bus_token bus_token); =20 --=20 2.34.1