From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 084BAC433FE for ; Thu, 17 Nov 2022 15:10:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240546AbiKQPJ7 (ORCPT ); Thu, 17 Nov 2022 10:09:59 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53492 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240354AbiKQPI7 (ORCPT ); Thu, 17 Nov 2022 10:08:59 -0500 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A46B57818A; Thu, 17 Nov 2022 07:08:13 -0800 (PST) Date: Thu, 17 Nov 2022 15:08:11 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1668697692; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=t8fznCxP69SuETyZQr8yT0c6IRwKcMNYv4criYjZ8wY=; b=S2yPESZyE0llRuqtDeRhcnn5iF89KHEbZ3r5n+IdltXV7IwQKhDi+1gAJfuo7WxJaVkiyD cxRjxO7YWVJ+0miNAfFeybLkNeShEgu6odNkCOkDE4EvT2BBunbPBCa0f5g5wk6+SkL4lu BNEshV26jWJk8uCde5auMHF+Wb792ot02TslWZgzJPZKKVtfikIfaUrj3GpFTjpMeIi6mt QsNsaSyUUc8OkGjF1BB2l9BAZ/SkmZqX8ypH3qluvD55KwMvC0GjChGmqLHA+0WAtjU8Wr /ZjimohHSzNfEW3E5KQ7f4xfJQHwa213myKqnPDoI1mkC3Phte9yICdChvgUwQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1668697692; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=t8fznCxP69SuETyZQr8yT0c6IRwKcMNYv4criYjZ8wY=; b=9bl+jeNZbz3m6/rr7LNNwluoyrRwM6VKrue/uT86ioHU+CnykZGcX+JP4Y3yc3ENgOBeGp 8xe79xTQmfoIXoDw== From: "tip-bot2 for Ahmed S. Darwish" Sender: tip-bot2@linutronix.de Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: irq/core] PCI/MSI: Move pci_enable_msix_range() to api.c Cc: "Ahmed S. Darwish" , Thomas Gleixner , Bjorn Helgaas , x86@kernel.org, linux-kernel@vger.kernel.org, maz@kernel.org In-Reply-To: <20221111122014.813792885@linutronix.de> References: <20221111122014.813792885@linutronix.de> MIME-Version: 1.0 Message-ID: <166869769108.4906.5050605228102293608.tip-bot2@tip-bot2> Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The following commit has been merged into the irq/core branch of tip: Commit-ID: be7496c1ef47e1ba8c4b389ee23178fcf066cc4e Gitweb: https://git.kernel.org/tip/be7496c1ef47e1ba8c4b389ee23178fcf066cc4e Author: Ahmed S. Darwish AuthorDate: Fri, 11 Nov 2022 14:54:48 +01:00 Committer: Thomas Gleixner CommitterDate: Thu, 17 Nov 2022 15:15:20 +01:00 PCI/MSI: Move pci_enable_msix_range() to api.c To disentangle the maze in msi.c, all exported device-driver MSI APIs are now to be grouped in one file, api.c. Move pci_enable_msix_range() and make its kernel-doc comprehensive. Signed-off-by: Ahmed S. Darwish Signed-off-by: Thomas Gleixner Acked-by: Bjorn Helgaas Link: https://lore.kernel.org/r/20221111122014.813792885@linutronix.de --- drivers/pci/msi/api.c | 32 ++++++++++++++++++++++++++++++++ drivers/pci/msi/msi.c | 30 ++++-------------------------- drivers/pci/msi/msi.h | 3 +++ 3 files changed, 39 insertions(+), 26 deletions(-) diff --git a/drivers/pci/msi/api.c b/drivers/pci/msi/api.c index 63d7f8f..d480505 100644 --- a/drivers/pci/msi/api.c +++ b/drivers/pci/msi/api.c @@ -58,3 +58,35 @@ void pci_disable_msi(struct pci_dev *dev) msi_unlock_descs(&dev->dev); } EXPORT_SYMBOL(pci_disable_msi); + +/** + * pci_enable_msix_range() - Enable MSI-X interrupt mode on device + * @dev: the PCI device to operate on + * @entries: input/output parameter, array of MSI-X configuration entries + * @minvec: minimum required number of MSI-X vectors + * @maxvec: maximum desired number of MSI-X vectors + * + * Legacy device driver API to enable MSI-X interrupt mode on device and + * configure its MSI-X capability structure as appropriate. The passed + * @entries array must have each of its members "entry" field set to a + * desired (valid) MSI-X vector number, where the range of valid MSI-X + * vector numbers can be queried through pci_msix_vec_count(). If + * successful, the driver must invoke pci_disable_msix() on cleanup. + * + * NOTE: The newer pci_alloc_irq_vectors() / pci_free_irq_vectors() API + * pair should, in general, be used instead. + * + * Return: number of MSI-X vectors allocated (which might be smaller + * than @maxvecs), where Linux IRQ numbers for such allocated vectors + * are saved back in the @entries array elements' "vector" field. Return + * -ENOSPC if less than @minvecs interrupt vectors are available. + * Return -EINVAL if one of the passed @entries members "entry" field + * was invalid or a duplicate, or if plain MSI interrupts mode was + * earlier enabled on device. Return other errnos otherwise. + */ +int pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries, + int minvec, int maxvec) +{ + return __pci_enable_msix_range(dev, entries, minvec, maxvec, NULL, 0); +} +EXPORT_SYMBOL(pci_enable_msix_range); diff --git a/drivers/pci/msi/msi.c b/drivers/pci/msi/msi.c index 98f07ad..6700ef1 100644 --- a/drivers/pci/msi/msi.c +++ b/drivers/pci/msi/msi.c @@ -844,10 +844,10 @@ int __pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec, } } -static int __pci_enable_msix_range(struct pci_dev *dev, - struct msix_entry *entries, int minvec, - int maxvec, struct irq_affinity *affd, - int flags) +int __pci_enable_msix_range(struct pci_dev *dev, + struct msix_entry *entries, int minvec, + int maxvec, struct irq_affinity *affd, + int flags) { int rc, nvec = maxvec; @@ -887,28 +887,6 @@ static int __pci_enable_msix_range(struct pci_dev *dev, } /** - * pci_enable_msix_range - configure device's MSI-X capability structure - * @dev: pointer to the pci_dev data structure of MSI-X device function - * @entries: pointer to an array of MSI-X entries - * @minvec: minimum number of MSI-X IRQs requested - * @maxvec: maximum number of MSI-X IRQs requested - * - * Setup the MSI-X capability structure of device function with a maximum - * possible number of interrupts in the range between @minvec and @maxvec - * upon its software driver call to request for MSI-X mode enabled on its - * hardware device function. It returns a negative errno if an error occurs. - * If it succeeds, it returns the actual number of interrupts allocated and - * indicates the successful configuration of MSI-X capability structure - * with new allocated MSI-X interrupts. - **/ -int pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries, - int minvec, int maxvec) -{ - return __pci_enable_msix_range(dev, entries, minvec, maxvec, NULL, 0); -} -EXPORT_SYMBOL(pci_enable_msix_range); - -/** * pci_alloc_irq_vectors_affinity - allocate multiple IRQs for a device * @dev: PCI device to operate on * @min_vecs: minimum number of vectors required (must be >= 1) diff --git a/drivers/pci/msi/msi.h b/drivers/pci/msi/msi.h index 00bb98d..8c4a528 100644 --- a/drivers/pci/msi/msi.h +++ b/drivers/pci/msi/msi.h @@ -88,8 +88,11 @@ static inline __attribute_const__ u32 msi_multi_mask(struct msi_desc *desc) void pci_msi_shutdown(struct pci_dev *dev); void pci_free_msi_irqs(struct pci_dev *dev); int __pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec, struct irq_affinity *affd); +int __pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries, int minvec, + int maxvec, struct irq_affinity *affd, int flags); /* Legacy (!IRQDOMAIN) fallbacks */ + #ifdef CONFIG_PCI_MSI_ARCH_FALLBACKS int pci_msi_legacy_setup_msi_irqs(struct pci_dev *dev, int nvec, int type); void pci_msi_legacy_teardown_msi_irqs(struct pci_dev *dev);