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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7A182C433EF for ; Sat, 27 Nov 2021 01:32:57 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4J1DdN0075z3fjV for ; Sat, 27 Nov 2021 12:32:55 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; secure) header.d=linutronix.de header.i=@linutronix.de header.a=rsa-sha256 header.s=2020 header.b=rL3dSVq5; dkim=fail reason="signature verification failed" header.d=linutronix.de header.i=@linutronix.de header.a=ed25519-sha256 header.s=2020e header.b=QLwf6Eyk; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linutronix.de (client-ip=2a0a:51c0:0:12e:550::1; helo=galois.linutronix.de; envelope-from=tglx@linutronix.de; receiver=) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; secure) header.d=linutronix.de header.i=@linutronix.de header.a=rsa-sha256 header.s=2020 header.b=rL3dSVq5; dkim=pass header.d=linutronix.de header.i=@linutronix.de header.a=ed25519-sha256 header.s=2020e header.b=QLwf6Eyk; dkim-atps=neutral Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4J1DKZ0Dr6z3cDy for ; Sat, 27 Nov 2021 12:19:14 +1100 (AEDT) Message-ID: <20211126223825.320724006@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1637975948; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=kh2ZB8gumt7yFa2wjaDhpeN9tXzUfJvLkALkOS94EFA=; b=rL3dSVq51HwJyrZ1GiK+2Uy987fWifzc93Kzd1rYDYc6CJES4RYQFW91VYz9giUBA4pc8g 3Gp8SO0SCSSci4EB0aGRBsqUldeO9DZdmixm6jmAcLXOjd3EDQN4ceHT5qIHtZ1M4OOjCs 5B1fwbTAHUDHkQfAY6r0w3SoQx1i3rzd1zp4I1umGTSQGLkl+Ug/rBlXyPGu1g3qmxiQdo 9/IiaSvnNmIreFZA0hbCMbgvbZt32iGcp6GO/Dw3rrPbcAK+xJsiiVNJEaCAM2vKSnhji3 6KWA27/ZxBzJeVpPdNFWb/PzJXwnrdawx9cM4YXt/mQphMHqQUhIcUngebAkPw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1637975948; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=kh2ZB8gumt7yFa2wjaDhpeN9tXzUfJvLkALkOS94EFA=; b=QLwf6Eyk3o45pGBEtsCZ2xr7a4DlyXTC6NnM3m6uL6iU2aPZXLRZf3PE6XQ/TuIY8Xwpt7 hQcta2kLnH2eixAg== From: Thomas Gleixner To: LKML Subject: [patch 21/22] genirq/msi: Handle PCI/MSI allocation fail in core code References: <20211126222700.862407977@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Date: Sat, 27 Nov 2021 02:19:07 +0100 (CET) X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-hyperv@vger.kernel.org, Paul Mackerras , sparclinux@vger.kernel.org, Wei Liu , Ashok Raj , Marc Zygnier , x86@kernel.org, Christian Borntraeger , Bjorn Helgaas , Jason Gunthorpe , linux-pci@vger.kernel.org, xen-devel@lists.xenproject.org, ath11k@lists.infradead.org, Kevin Tian , Heiko Carstens , Alex Williamson , Megha Dey , Juergen Gross , Thomas Bogendoerfer , Greg Kroah-Hartman , linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Get rid of yet another irqdomain callback and let the core code return the already available information of how many descriptors could be allocated. Signed-off-by: Thomas Gleixner --- drivers/pci/msi/irqdomain.c | 13 ------------- include/linux/msi.h | 5 +---- kernel/irq/msi.c | 29 +++++++++++++++++++++++++---- 3 files changed, 26 insertions(+), 21 deletions(-) --- a/drivers/pci/msi/irqdomain.c +++ b/drivers/pci/msi/irqdomain.c @@ -95,16 +95,6 @@ static int pci_msi_domain_check_cap(stru return 0; } -static int pci_msi_domain_handle_error(struct irq_domain *domain, - struct msi_desc *desc, int error) -{ - /* Special handling to support __pci_enable_msi_range() */ - if (pci_msi_desc_is_multi_msi(desc) && error == -ENOSPC) - return 1; - - return error; -} - static void pci_msi_domain_set_desc(msi_alloc_info_t *arg, struct msi_desc *desc) { @@ -115,7 +105,6 @@ static void pci_msi_domain_set_desc(msi_ static struct msi_domain_ops pci_msi_domain_ops_default = { .set_desc = pci_msi_domain_set_desc, .msi_check = pci_msi_domain_check_cap, - .handle_error = pci_msi_domain_handle_error, }; static void pci_msi_domain_update_dom_ops(struct msi_domain_info *info) @@ -129,8 +118,6 @@ static void pci_msi_domain_update_dom_op ops->set_desc = pci_msi_domain_set_desc; if (ops->msi_check == NULL) ops->msi_check = pci_msi_domain_check_cap; - if (ops->handle_error == NULL) - ops->handle_error = pci_msi_domain_handle_error; } } --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -285,7 +285,6 @@ struct msi_domain_info; * @msi_check: Callback for verification of the domain/info/dev data * @msi_prepare: Prepare the allocation of the interrupts in the domain * @set_desc: Set the msi descriptor for an interrupt - * @handle_error: Optional error handler if the allocation fails * @domain_alloc_irqs: Optional function to override the default allocation * function. * @domain_free_irqs: Optional function to override the default free @@ -294,7 +293,7 @@ struct msi_domain_info; * @get_hwirq, @msi_init and @msi_free are callbacks used by the underlying * irqdomain. * - * @msi_check, @msi_prepare, @handle_error and @set_desc are callbacks used by + * @msi_check, @msi_prepare and @set_desc are callbacks used by * msi_domain_alloc/free_irqs(). * * @domain_alloc_irqs, @domain_free_irqs can be used to override the @@ -331,8 +330,6 @@ struct msi_domain_ops { msi_alloc_info_t *arg); void (*set_desc)(msi_alloc_info_t *arg, struct msi_desc *desc); - int (*handle_error)(struct irq_domain *domain, - struct msi_desc *desc, int error); int (*domain_alloc_irqs)(struct irq_domain *domain, struct device *dev, int nvec); void (*domain_free_irqs)(struct irq_domain *domain, --- a/kernel/irq/msi.c +++ b/kernel/irq/msi.c @@ -538,6 +538,27 @@ static bool msi_check_reservation_mode(s return desc->pci.msi_attrib.is_msix || desc->pci.msi_attrib.can_mask; } +static int msi_handle_pci_fail(struct irq_domain *domain, struct msi_desc *desc, + int allocated) +{ + switch(domain->bus_token) { + case DOMAIN_BUS_PCI_MSI: + case DOMAIN_BUS_VMD_MSI: + if (IS_ENABLED(CONFIG_PCI_MSI)) + break; + fallthrough; + default: + return -ENOSPC; + } + + /* Let a failed PCI multi MSI allocation retry */ + if (desc->nvec_used > 1) + return 1; + + /* If there was a successful allocation let the caller know */ + return allocated ? allocated : -ENOSPC; +} + int __msi_domain_alloc_irqs(struct irq_domain *domain, struct device *dev, int nvec) { @@ -546,6 +567,7 @@ int __msi_domain_alloc_irqs(struct irq_d struct irq_data *irq_data; struct msi_desc *desc; msi_alloc_info_t arg = { }; + int allocated = 0; int i, ret, virq; bool can_reserve; @@ -560,16 +582,15 @@ int __msi_domain_alloc_irqs(struct irq_d dev_to_node(dev), &arg, false, desc->affinity); if (virq < 0) { - ret = -ENOSPC; - if (ops->handle_error) - ret = ops->handle_error(domain, desc, ret); - return ret; + ret = msi_handle_pci_fail(domain, desc, allocated); + goto cleanup; } for (i = 0; i < desc->nvec_used; i++) { irq_set_msi_desc_off(virq, i, desc); irq_debugfs_copy_devname(virq + i, dev); } + allocated++; } can_reserve = msi_check_reservation_mode(domain, info, dev); 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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 279BCC433F5 for ; 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dkim-atps=neutral Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4J1DLN6hgtz3cnd for ; Sat, 27 Nov 2021 12:19:56 +1100 (AEDT) Message-ID: <20211126223825.320724006@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1637975994; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=kh2ZB8gumt7yFa2wjaDhpeN9tXzUfJvLkALkOS94EFA=; b=D9US/8tVMwlRfaqgiDmj8ly+USrLZ+QbU+koi5BF+9g0Iguix1/4W7JOvM77Fxvfxk0Pk4 i3Alyb5QMZHm2M3doE0zc03SvL1G/N+bW29B5GT+JiK+vvoAlbXFGOqr1+ineD8/JbZxLU VefISwNxY93Qm1ylUIwl0+ZfwQytaWS63YV3kQ7UyjTBMGq2GViLeHOw0UV4yJZV5wEQAD BOCN8t3XNrraZIreQz7DQgTEE6WK/0Rw8FSfygM1uVbA31f7wm0TvILCaHzAcara9sqOXE zsr873tLkNtGYtX/TI5l1mJFeYDe+L1wjO8kk9uwsSbh+uyxfw/ICDIhVgWFVw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1637975994; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=kh2ZB8gumt7yFa2wjaDhpeN9tXzUfJvLkALkOS94EFA=; b=8Uh+QoxZaq46tV5s75Y6r3qCvSsAdyGP5v255GrAqW6V5bDTByErDycUXzyT6e32TmhIUx k69MGZ3JHevpO4BQ== From: Thomas Gleixner To: LKML Subject: [patch 21/22] genirq/msi: Handle PCI/MSI allocation fail in core code References: <20211126222700.862407977@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Date: Sat, 27 Nov 2021 02:19:53 +0100 (CET) X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-hyperv@vger.kernel.org, Paul Mackerras , sparclinux@vger.kernel.org, Wei Liu , Ashok Raj , Marc Zygnier , x86@kernel.org, Christian Borntraeger , Bjorn Helgaas , Jason Gunthorpe , linux-pci@vger.kernel.org, xen-devel@lists.xenproject.org, ath11k@lists.infradead.org, Kevin Tian , Heiko Carstens , Alex Williamson , Megha Dey , Juergen Gross , Thomas Bogendoerfer , Greg Kroah-Hartman , linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Message-ID: <20211127011953.YHr0BPBpSQd_DMezYlODW8LKbeqM7s1_bCDtIi_vei0@z> Get rid of yet another irqdomain callback and let the core code return the already available information of how many descriptors could be allocated. Signed-off-by: Thomas Gleixner --- drivers/pci/msi/irqdomain.c | 13 ------------- include/linux/msi.h | 5 +---- kernel/irq/msi.c | 29 +++++++++++++++++++++++++---- 3 files changed, 26 insertions(+), 21 deletions(-) --- a/drivers/pci/msi/irqdomain.c +++ b/drivers/pci/msi/irqdomain.c @@ -95,16 +95,6 @@ static int pci_msi_domain_check_cap(stru return 0; } -static int pci_msi_domain_handle_error(struct irq_domain *domain, - struct msi_desc *desc, int error) -{ - /* Special handling to support __pci_enable_msi_range() */ - if (pci_msi_desc_is_multi_msi(desc) && error == -ENOSPC) - return 1; - - return error; -} - static void pci_msi_domain_set_desc(msi_alloc_info_t *arg, struct msi_desc *desc) { @@ -115,7 +105,6 @@ static void pci_msi_domain_set_desc(msi_ static struct msi_domain_ops pci_msi_domain_ops_default = { .set_desc = pci_msi_domain_set_desc, .msi_check = pci_msi_domain_check_cap, - .handle_error = pci_msi_domain_handle_error, }; static void pci_msi_domain_update_dom_ops(struct msi_domain_info *info) @@ -129,8 +118,6 @@ static void pci_msi_domain_update_dom_op ops->set_desc = pci_msi_domain_set_desc; if (ops->msi_check == NULL) ops->msi_check = pci_msi_domain_check_cap; - if (ops->handle_error == NULL) - ops->handle_error = pci_msi_domain_handle_error; } } --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -285,7 +285,6 @@ struct msi_domain_info; * @msi_check: Callback for verification of the domain/info/dev data * @msi_prepare: Prepare the allocation of the interrupts in the domain * @set_desc: Set the msi descriptor for an interrupt - * @handle_error: Optional error handler if the allocation fails * @domain_alloc_irqs: Optional function to override the default allocation * function. * @domain_free_irqs: Optional function to override the default free @@ -294,7 +293,7 @@ struct msi_domain_info; * @get_hwirq, @msi_init and @msi_free are callbacks used by the underlying * irqdomain. * - * @msi_check, @msi_prepare, @handle_error and @set_desc are callbacks used by + * @msi_check, @msi_prepare and @set_desc are callbacks used by * msi_domain_alloc/free_irqs(). * * @domain_alloc_irqs, @domain_free_irqs can be used to override the @@ -331,8 +330,6 @@ struct msi_domain_ops { msi_alloc_info_t *arg); void (*set_desc)(msi_alloc_info_t *arg, struct msi_desc *desc); - int (*handle_error)(struct irq_domain *domain, - struct msi_desc *desc, int error); int (*domain_alloc_irqs)(struct irq_domain *domain, struct device *dev, int nvec); void (*domain_free_irqs)(struct irq_domain *domain, --- a/kernel/irq/msi.c +++ b/kernel/irq/msi.c @@ -538,6 +538,27 @@ static bool msi_check_reservation_mode(s return desc->pci.msi_attrib.is_msix || desc->pci.msi_attrib.can_mask; } +static int msi_handle_pci_fail(struct irq_domain *domain, struct msi_desc *desc, + int allocated) +{ + switch(domain->bus_token) { + case DOMAIN_BUS_PCI_MSI: + case DOMAIN_BUS_VMD_MSI: + if (IS_ENABLED(CONFIG_PCI_MSI)) + break; + fallthrough; + default: + return -ENOSPC; + } + + /* Let a failed PCI multi MSI allocation retry */ + if (desc->nvec_used > 1) + return 1; + + /* If there was a successful allocation let the caller know */ + return allocated ? allocated : -ENOSPC; +} + int __msi_domain_alloc_irqs(struct irq_domain *domain, struct device *dev, int nvec) { @@ -546,6 +567,7 @@ int __msi_domain_alloc_irqs(struct irq_d struct irq_data *irq_data; struct msi_desc *desc; msi_alloc_info_t arg = { }; + int allocated = 0; int i, ret, virq; bool can_reserve; @@ -560,16 +582,15 @@ int __msi_domain_alloc_irqs(struct irq_d dev_to_node(dev), &arg, false, desc->affinity); if (virq < 0) { - ret = -ENOSPC; - if (ops->handle_error) - ret = ops->handle_error(domain, desc, ret); - return ret; + ret = msi_handle_pci_fail(domain, desc, allocated); + goto cleanup; } for (i = 0; i < desc->nvec_used; i++) { irq_set_msi_desc_off(virq, i, desc); irq_debugfs_copy_devname(virq + i, dev); } + allocated++; } can_reserve = msi_check_reservation_mode(domain, info, dev);