From: Thomas Gleixner <tglx@linutronix.de> To: LKML <linux-kernel@vger.kernel.org> Cc: Will Deacon <will@kernel.org>, linux-pci@vger.kernel.org, Bjorn Helgaas <bhelgaas@google.com>, Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>, Marc Zyngier <maz@kernel.org>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Jason Gunthorpe <jgg@mellanox.com>, Andrew Lunn <andrew@lunn.ch>, Gregory Clement <gregory.clement@bootlin.com>, Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>, Ammar Faizi <ammarfaizi2@gnuweeb.org>, Robin Murphy <robin.murphy@arm.com>, Lorenzo Pieralisi <lpieralisi@kernel.org>, Nishanth Menon <nm@ti.com>, Tero Kristo <kristo@kernel.org>, Santosh Shilimkar <ssantosh@kernel.org>, linux-arm-kernel@lists.infradead.org, Vinod Koul <vkoul@kernel.org>, Sinan Kaya <okaya@kernel.org>, Andy Gross <agross@kernel.org>, Bjorn Andersson <andersson@kernel.org>, Mark Rutland <mark.rutland@arm.com>, Shameerali Kolothum Thodi <shameerali.kolothum.thodi@huawei.com>, Zenghui Yu <yuzenghui@huawei.com>, Shawn Guo <shawnguo@kernel.org>, Sascha Hauer <s.hauer@pengutronix.de>, Fabio Estevam <festevam@gmail.com> Subject: [patch V2 19/40] genirq/msi: Split msi_domain_alloc_irq_at() Date: Mon, 21 Nov 2022 15:39:52 +0100 (CET) [thread overview] Message-ID: <20221121140049.491212443@linutronix.de> (raw) In-Reply-To: 20221121135653.208611233@linutronix.de In preparation for providing a special allocation function for wired interrupt which are connected to a wire to MSI bridge, split the inner workings of msi_domain_alloc_irq_at() out into a helper function so the code can be shared. No functional change. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> --- kernel/irq/msi.c | 76 +++++++++++++++++++++++++++++++------------------------ 1 file changed, 43 insertions(+), 33 deletions(-) --- a/kernel/irq/msi.c +++ b/kernel/irq/msi.c @@ -1465,34 +1465,10 @@ int msi_domain_alloc_irqs_all_locked(str return msi_domain_alloc_locked(dev, &ctrl); } -/** - * msi_domain_alloc_irq_at - Allocate an interrupt from a MSI interrupt domain at - * a given index - or at the next free index - * - * @dev: Pointer to device struct of the device for which the interrupts - * are allocated - * @domid: Id of the interrupt domain to operate on - * @index: Index for allocation. If @index == %MSI_ANY_INDEX the allocation - * uses the next free index. - * @affdesc: Optional pointer to an interrupt affinity descriptor structure - * @icookie: Optional pointer to a domain specific per instance cookie. If - * non-NULL the content of the cookie is stored in msi_desc::data. - * Must be NULL for MSI-X allocations - * - * This requires a MSI interrupt domain which lets the core code manage the - * MSI descriptors. - * - * Return: struct msi_map - * - * On success msi_map::index contains the allocated index number and - * msi_map::virq the corresponding Linux interrupt number - * - * On failure msi_map::index contains the error code and msi_map::virq - * is %0. - */ -struct msi_map msi_domain_alloc_irq_at(struct device *dev, unsigned int domid, unsigned int index, - const struct irq_affinity_desc *affdesc, - union msi_instance_cookie *icookie) +static struct msi_map __msi_domain_alloc_irq_at(struct device *dev, unsigned int domid, + unsigned int index, + const struct irq_affinity_desc *affdesc, + union msi_instance_cookie *icookie) { struct msi_ctrl ctrl = { .domid = domid, .nirqs = 1, }; struct msi_domain_info *info; @@ -1501,17 +1477,16 @@ struct msi_map msi_domain_alloc_irq_at(s struct msi_desc *desc; int ret; - msi_lock_descs(dev); domain = msi_get_device_domain(dev, domid); if (!domain) { map.index = -ENODEV; - goto unlock; + return map; } desc = msi_alloc_desc(dev, 1, affdesc); if (!desc) { map.index = -ENOMEM; - goto unlock; + return map; } if (icookie) @@ -1520,7 +1495,7 @@ struct msi_map msi_domain_alloc_irq_at(s ret = msi_insert_desc(dev, desc, domid, index); if (ret) { map.index = ret; - goto unlock; + return map; } ctrl.first = ctrl.last = desc->msi_index; @@ -1534,7 +1509,42 @@ struct msi_map msi_domain_alloc_irq_at(s map.index = desc->msi_index; map.virq = desc->irq; } -unlock: + return map; +} + +/** + * msi_domain_alloc_irq_at - Allocate an interrupt from a MSI interrupt domain at + * a given index - or at the next free index + * + * @dev: Pointer to device struct of the device for which the interrupts + * are allocated + * @domid: Id of the interrupt domain to operate on + * @index: Index for allocation. If @index == %MSI_ANY_INDEX the allocation + * uses the next free index. + * @affdesc: Optional pointer to an interrupt affinity descriptor structure + * @icookie: Optional pointer to a domain specific per instance cookie. If + * non-NULL the content of the cookie is stored in msi_desc::data. + * Must be NULL for MSI-X allocations + * + * This requires a MSI interrupt domain which lets the core code manage the + * MSI descriptors. + * + * Return: struct msi_map + * + * On success msi_map::index contains the allocated index number and + * msi_map::virq the corresponding Linux interrupt number + * + * On failure msi_map::index contains the error code and msi_map::virq + * is %0. + */ +struct msi_map msi_domain_alloc_irq_at(struct device *dev, unsigned int domid, unsigned int index, + const struct irq_affinity_desc *affdesc, + union msi_instance_cookie *icookie) +{ + struct msi_map map; + + msi_lock_descs(dev); + map = __msi_domain_alloc_irq_at(dev, domid, index, affdesc, icookie); msi_unlock_descs(dev); return map; }
WARNING: multiple messages have this Message-ID (diff)
From: Thomas Gleixner <tglx@linutronix.de> To: LKML <linux-kernel@vger.kernel.org> Cc: Will Deacon <will@kernel.org>, linux-pci@vger.kernel.org, Bjorn Helgaas <bhelgaas@google.com>, Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>, Marc Zyngier <maz@kernel.org>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Jason Gunthorpe <jgg@mellanox.com>, Andrew Lunn <andrew@lunn.ch>, Gregory Clement <gregory.clement@bootlin.com>, Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>, Ammar Faizi <ammarfaizi2@gnuweeb.org>, Robin Murphy <robin.murphy@arm.com>, Lorenzo Pieralisi <lpieralisi@kernel.org>, Nishanth Menon <nm@ti.com>, Tero Kristo <kristo@kernel.org>, Santosh Shilimkar <ssantosh@kernel.org>, linux-arm-kernel@lists.infradead.org, Vinod Koul <vkoul@kernel.org>, Sinan Kaya <okaya@kernel.org>, Andy Gross <agross@kernel.org>, Bjorn Andersson <andersson@kernel.org>, Mark Rutland <mark.rutland@arm.com>, Shameerali Kolothum Thodi <shameerali.kolothum.thodi@huawei.com>, Zenghui Yu <yuzenghui@huawei.com>, Shawn Guo <shawnguo@kernel.org>, Sascha Hauer <s.hauer@pengutronix.de>, Fabio Estevam <festevam@gmail.com> Subject: [patch V2 19/40] genirq/msi: Split msi_domain_alloc_irq_at() Date: Mon, 21 Nov 2022 15:39:52 +0100 (CET) [thread overview] Message-ID: <20221121140049.491212443@linutronix.de> (raw) In-Reply-To: 20221121135653.208611233@linutronix.de In preparation for providing a special allocation function for wired interrupt which are connected to a wire to MSI bridge, split the inner workings of msi_domain_alloc_irq_at() out into a helper function so the code can be shared. No functional change. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> --- kernel/irq/msi.c | 76 +++++++++++++++++++++++++++++++------------------------ 1 file changed, 43 insertions(+), 33 deletions(-) --- a/kernel/irq/msi.c +++ b/kernel/irq/msi.c @@ -1465,34 +1465,10 @@ int msi_domain_alloc_irqs_all_locked(str return msi_domain_alloc_locked(dev, &ctrl); } -/** - * msi_domain_alloc_irq_at - Allocate an interrupt from a MSI interrupt domain at - * a given index - or at the next free index - * - * @dev: Pointer to device struct of the device for which the interrupts - * are allocated - * @domid: Id of the interrupt domain to operate on - * @index: Index for allocation. If @index == %MSI_ANY_INDEX the allocation - * uses the next free index. - * @affdesc: Optional pointer to an interrupt affinity descriptor structure - * @icookie: Optional pointer to a domain specific per instance cookie. If - * non-NULL the content of the cookie is stored in msi_desc::data. - * Must be NULL for MSI-X allocations - * - * This requires a MSI interrupt domain which lets the core code manage the - * MSI descriptors. - * - * Return: struct msi_map - * - * On success msi_map::index contains the allocated index number and - * msi_map::virq the corresponding Linux interrupt number - * - * On failure msi_map::index contains the error code and msi_map::virq - * is %0. - */ -struct msi_map msi_domain_alloc_irq_at(struct device *dev, unsigned int domid, unsigned int index, - const struct irq_affinity_desc *affdesc, - union msi_instance_cookie *icookie) +static struct msi_map __msi_domain_alloc_irq_at(struct device *dev, unsigned int domid, + unsigned int index, + const struct irq_affinity_desc *affdesc, + union msi_instance_cookie *icookie) { struct msi_ctrl ctrl = { .domid = domid, .nirqs = 1, }; struct msi_domain_info *info; @@ -1501,17 +1477,16 @@ struct msi_map msi_domain_alloc_irq_at(s struct msi_desc *desc; int ret; - msi_lock_descs(dev); domain = msi_get_device_domain(dev, domid); if (!domain) { map.index = -ENODEV; - goto unlock; + return map; } desc = msi_alloc_desc(dev, 1, affdesc); if (!desc) { map.index = -ENOMEM; - goto unlock; + return map; } if (icookie) @@ -1520,7 +1495,7 @@ struct msi_map msi_domain_alloc_irq_at(s ret = msi_insert_desc(dev, desc, domid, index); if (ret) { map.index = ret; - goto unlock; + return map; } ctrl.first = ctrl.last = desc->msi_index; @@ -1534,7 +1509,42 @@ struct msi_map msi_domain_alloc_irq_at(s map.index = desc->msi_index; map.virq = desc->irq; } -unlock: + return map; +} + +/** + * msi_domain_alloc_irq_at - Allocate an interrupt from a MSI interrupt domain at + * a given index - or at the next free index + * + * @dev: Pointer to device struct of the device for which the interrupts + * are allocated + * @domid: Id of the interrupt domain to operate on + * @index: Index for allocation. If @index == %MSI_ANY_INDEX the allocation + * uses the next free index. + * @affdesc: Optional pointer to an interrupt affinity descriptor structure + * @icookie: Optional pointer to a domain specific per instance cookie. If + * non-NULL the content of the cookie is stored in msi_desc::data. + * Must be NULL for MSI-X allocations + * + * This requires a MSI interrupt domain which lets the core code manage the + * MSI descriptors. + * + * Return: struct msi_map + * + * On success msi_map::index contains the allocated index number and + * msi_map::virq the corresponding Linux interrupt number + * + * On failure msi_map::index contains the error code and msi_map::virq + * is %0. + */ +struct msi_map msi_domain_alloc_irq_at(struct device *dev, unsigned int domid, unsigned int index, + const struct irq_affinity_desc *affdesc, + union msi_instance_cookie *icookie) +{ + struct msi_map map; + + msi_lock_descs(dev); + map = __msi_domain_alloc_irq_at(dev, domid, index, affdesc, icookie); msi_unlock_descs(dev); return map; } _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2022-11-21 14:49 UTC|newest] Thread overview: 118+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-11-21 14:39 [patch V2 00/40] genirq, irqchip: Convert ARM MSI handling to per device MSI domains Thomas Gleixner 2022-11-21 14:39 ` Thomas Gleixner 2022-11-21 14:39 ` [patch V2 01/40] irqchip/irq-mvebu-icu: Fix works by chance pointer assignment Thomas Gleixner 2022-11-21 14:39 ` Thomas Gleixner 2022-11-24 12:50 ` Marc Zyngier 2022-11-24 12:50 ` Marc Zyngier 2022-12-06 11:57 ` [tip: irq/core] " tip-bot2 for Thomas Gleixner 2022-11-21 14:39 ` [patch V2 02/40] ACPI/IORT: Make prototype of iort_pmsi_get_dev_id() always available Thomas Gleixner 2022-11-21 14:39 ` Thomas Gleixner 2022-11-21 15:13 ` Robin Murphy 2022-11-21 15:13 ` Robin Murphy 2022-11-21 14:39 ` [patch V2 03/40] irqchip/gic-v2m: Include arm-gic-common.h Thomas Gleixner 2022-11-21 14:39 ` Thomas Gleixner 2022-11-24 12:51 ` Marc Zyngier 2022-11-24 12:51 ` Marc Zyngier 2022-12-06 11:57 ` [tip: irq/core] " tip-bot2 for Thomas Gleixner 2022-11-21 14:39 ` [patch V2 04/40] irqchip/gic-v2m: Mark a few functions __init Thomas Gleixner 2022-11-21 14:39 ` Thomas Gleixner 2022-11-24 12:54 ` Marc Zyngier 2022-11-24 12:54 ` Marc Zyngier 2022-12-06 11:57 ` [tip: irq/core] " tip-bot2 for Thomas Gleixner 2022-11-21 14:39 ` [patch V2 05/40] irqchip/ti-sci-inta: Fix kernel doc Thomas Gleixner 2022-11-21 14:39 ` Thomas Gleixner 2022-11-24 12:54 ` Marc Zyngier 2022-11-24 12:54 ` Marc Zyngier 2022-12-06 11:57 ` [tip: irq/core] " tip-bot2 for Thomas Gleixner 2022-11-21 14:39 ` [patch V2 06/40] PCI/MSI: Provide static key for parent mask/unmask Thomas Gleixner 2022-11-21 14:39 ` Thomas Gleixner 2022-11-24 13:04 ` Marc Zyngier 2022-11-24 13:04 ` Marc Zyngier 2022-11-24 13:17 ` Thomas Gleixner 2022-11-24 13:17 ` Thomas Gleixner 2022-11-24 13:38 ` Marc Zyngier 2022-11-24 13:38 ` Marc Zyngier 2022-11-25 0:11 ` Thomas Gleixner 2022-11-25 0:11 ` Thomas Gleixner 2023-05-22 14:19 ` Thomas Gleixner 2023-05-22 14:19 ` Thomas Gleixner 2023-05-23 10:25 ` Marc Zyngier 2023-05-23 10:25 ` Marc Zyngier 2023-05-23 13:05 ` Thomas Gleixner 2023-05-23 13:05 ` Thomas Gleixner 2023-05-31 8:35 ` Marc Zyngier 2023-05-31 8:35 ` Marc Zyngier 2022-11-21 14:39 ` [patch V2 07/40] irqchip/gic-v3: Make gic_irq_domain_select() robust for zero parameter count Thomas Gleixner 2022-11-21 14:39 ` Thomas Gleixner 2022-11-21 14:39 ` [patch V2 08/40] genirq/irqdomain: Remove the param count restriction from select() Thomas Gleixner 2022-11-21 14:39 ` Thomas Gleixner 2022-11-21 14:39 ` [patch V2 09/40] genirq/msi: Extend msi_parent_ops Thomas Gleixner 2022-11-21 14:39 ` Thomas Gleixner 2022-11-21 14:39 ` [patch V2 10/40] irqchip: Provide irq-gic-lib Thomas Gleixner 2022-11-21 14:39 ` Thomas Gleixner 2022-11-21 14:39 ` [patch V2 11/40] irqchip/gic-v3-its: Provide MSI parent infrastructure Thomas Gleixner 2022-11-21 14:39 ` Thomas Gleixner 2022-11-21 14:39 ` [patch V2 12/40] irqchip/gic-msi-lib: Prepare for PCI MSI/MSIX Thomas Gleixner 2022-11-21 14:39 ` Thomas Gleixner 2022-11-21 14:39 ` [patch V2 13/40] irqchip/gic-v3-its: Provide MSI parent for PCI/MSI[-X] Thomas Gleixner 2022-11-21 14:39 ` Thomas Gleixner 2022-11-21 14:39 ` [patch V2 14/40] genirq/irqdomain: Add BUS_DOMAIN_DEVICE_MSI Thomas Gleixner 2022-11-21 14:39 ` Thomas Gleixner 2022-11-21 14:39 ` [patch V2 15/40] irqchip/gic-msi-lib: Prepare for DEVICE MSI to replace platform MSI Thomas Gleixner 2022-11-21 14:39 ` Thomas Gleixner 2022-11-21 14:39 ` [patch V2 16/40] platform-msi: Prepare for real per device domains Thomas Gleixner 2022-11-21 14:39 ` Thomas Gleixner 2022-11-21 14:39 ` [patch V2 17/40] irqchip: Convert all platform MSI users to the new API Thomas Gleixner 2022-11-21 14:39 ` Thomas Gleixner 2022-11-21 14:39 ` [patch V2 18/40] genirq/msi: Provide optional translation op Thomas Gleixner 2022-11-21 14:39 ` Thomas Gleixner 2022-11-21 14:39 ` Thomas Gleixner [this message] 2022-11-21 14:39 ` [patch V2 19/40] genirq/msi: Split msi_domain_alloc_irq_at() Thomas Gleixner 2022-11-21 14:39 ` [patch V2 20/40] genirq/msi: Provide BUS DEVICE_MSI_WIRED Thomas Gleixner 2022-11-21 14:39 ` Thomas Gleixner 2022-11-21 14:39 ` [patch V2 21/40] genirq/msi: Optionally use dev->fwnode for device domain Thomas Gleixner 2022-11-21 14:39 ` Thomas Gleixner 2022-11-21 14:39 ` [patch V2 22/40] genirq/msi: Provide allocation/free functions for "wired" MSI interrupts Thomas Gleixner 2022-11-21 14:39 ` Thomas Gleixner 2022-11-21 14:39 ` [patch V2 23/40] genirq/irqdomain: Reroute device MSI create_mapping Thomas Gleixner 2022-11-21 14:39 ` Thomas Gleixner 2022-11-21 14:39 ` [patch V2 24/40] irqchip/mbigen: Prepare for real per device MSI Thomas Gleixner 2022-11-21 14:39 ` Thomas Gleixner 2022-11-21 14:39 ` [patch V2 25/40] irqchip/gic-msi-lib: Prepare for DOMAIN_BUS_WIRED_TO_MSI Thomas Gleixner 2022-11-21 14:39 ` Thomas Gleixner 2022-11-21 14:40 ` [patch V2 26/40] irqchip/gic-v3-its: Switch platform MSI to MSI parent Thomas Gleixner 2022-11-21 14:40 ` Thomas Gleixner 2022-11-21 14:40 ` [patch V2 27/40] irqchip/mbigen: Remove platform_msi_create_device_domain() fallback Thomas Gleixner 2022-11-21 14:40 ` Thomas Gleixner 2022-11-21 14:40 ` [patch V2 28/40] genirq/msi: Remove platform_msi_create_device_domain() Thomas Gleixner 2022-11-21 14:40 ` Thomas Gleixner 2022-11-21 14:40 ` [patch V2 29/40] genirq/gic-v3-mbi: Remove unused wired MSI mechanics Thomas Gleixner 2022-11-21 14:40 ` Thomas Gleixner 2022-11-21 14:40 ` [patch V2 30/40] genirq/gic-v3-mbi: Switch to MSI parent Thomas Gleixner 2022-11-21 14:40 ` Thomas Gleixner 2022-11-21 14:40 ` [patch V2 31/40] irqchip/gic-v2m: Switch to device MSI Thomas Gleixner 2022-11-21 14:40 ` Thomas Gleixner 2022-11-21 14:40 ` [patch V2 32/40] genirq/msi: Provide MSI_FLAG_PARENT_PM_DEV Thomas Gleixner 2022-11-21 14:40 ` Thomas Gleixner 2022-11-21 14:40 ` [patch V2 33/40] irqchip/imx-mu-msi: Switch to MSI parent Thomas Gleixner 2022-11-21 14:40 ` Thomas Gleixner 2022-11-28 20:47 ` Frank Li 2022-11-28 20:47 ` Frank Li 2022-11-28 21:03 ` Thomas Gleixner 2022-11-28 21:03 ` Thomas Gleixner 2022-11-21 14:40 ` [patch V2 34/40] irqchip/irq-mvebu-icu: Prepare for real per device MSI Thomas Gleixner 2022-11-21 14:40 ` Thomas Gleixner 2022-11-21 14:40 ` [patch V2 35/40] irqchip/mvebu-gicp: Switch to MSI parent Thomas Gleixner 2022-11-21 14:40 ` Thomas Gleixner 2022-11-21 14:40 ` [patch V2 36/40] irqchip/mvebu-odmi: Switch to parent MSI Thomas Gleixner 2022-11-21 14:40 ` Thomas Gleixner 2022-11-21 14:40 ` [patch V2 37/40] irqchip/irq-mvebu-sei: Switch to MSI parent Thomas Gleixner 2022-11-21 14:40 ` Thomas Gleixner 2022-11-21 14:40 ` [patch V2 38/40] irqchip/irq-mvebu-icu: Remove platform MSI leftovers Thomas Gleixner 2022-11-21 14:40 ` Thomas Gleixner 2022-11-21 14:40 ` [patch V2 39/40] genirq/msi: " Thomas Gleixner 2022-11-21 14:40 ` Thomas Gleixner 2022-11-21 14:40 ` [patch V2 40/40] genirq/msi: Move msi_device_data to core Thomas Gleixner 2022-11-21 14:40 ` Thomas Gleixner 2023-01-11 19:29 ` [patch V2 00/40] genirq, irqchip: Convert ARM MSI handling to per device MSI domains Frank Li 2023-01-11 19:29 ` Frank Li
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