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From: Thomas Gleixner <tglx@linutronix.de>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Bjorn Helgaas <helgaas@kernel.org>, Marc Zygnier <maz@kernel.org>,
	Alex Williamson <alex.williamson@redhat.com>,
	Kevin Tian <kevin.tian@intel.com>,
	Jason Gunthorpe <jgg@nvidia.com>, Megha Dey <megha.dey@intel.com>,
	Ashok Raj <ashok.raj@intel.com>,
	linux-pci@vger.kernel.org,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Santosh Shilimkar <ssantosh@kernel.org>,
	iommu@lists.linux-foundation.org, dmaengine@vger.kernel.org,
	Stuart Yoder <stuyoder@gmail.com>,
	Laurentiu Tudor <laurentiu.tudor@nxp.com>,
	Nishanth Menon <nm@ti.com>, Tero Kristo <kristo@kernel.org>,
	linux-arm-kernel@lists.infradead.org, x86@kernel.org,
	Vinod Koul <vkoul@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Will Deacon <will@kernel.org>, Sinan Kaya <okaya@kernel.org>
Subject: [patch 08/37] genirq/msi: Provide msi_device_populate/destroy_sysfs()
Date: Sat, 27 Nov 2021 02:20:19 +0100 (CET)	[thread overview]
Message-ID: <20211126230524.416227100@linutronix.de> (raw)
In-Reply-To: <20211126224100.303046749@linutronix.de>

Add new allocation functions which can be activated by domain info
flags. They store the groups pointer in struct msi_device_data.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 include/linux/msi.h |   12 +++++++++++-
 kernel/irq/msi.c    |   42 ++++++++++++++++++++++++++++++++++++++++--
 2 files changed, 51 insertions(+), 3 deletions(-)

--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -174,9 +174,11 @@ struct msi_desc {
 /**
  * msi_device_data - MSI per device data
  * @lock:		Spinlock to protect register access
+ * @attrs:		Pointer to the sysfs attribute group
  */
 struct msi_device_data {
-	raw_spinlock_t		lock;
+	raw_spinlock_t			lock;
+	const struct attribute_group    **attrs;
 };
 
 int msi_setup_device_data(struct device *dev);
@@ -242,10 +244,16 @@ void pci_msi_mask_irq(struct irq_data *d
 void pci_msi_unmask_irq(struct irq_data *data);
 
 #ifdef CONFIG_SYSFS
+int msi_device_populate_sysfs(struct device *dev);
+void msi_device_destroy_sysfs(struct device *dev);
+
 const struct attribute_group **msi_populate_sysfs(struct device *dev);
 void msi_destroy_sysfs(struct device *dev,
 		       const struct attribute_group **msi_irq_groups);
 #else
+static inline int msi_device_populate_sysfs(struct device *dev) { return 0; }
+static inline void msi_device_destroy_sysfs(struct device *dev) { }
+
 static inline const struct attribute_group **msi_populate_sysfs(struct device *dev)
 {
 	return NULL;
@@ -393,6 +401,8 @@ enum {
 	MSI_FLAG_MUST_REACTIVATE	= (1 << 5),
 	/* Is level-triggered capable, using two messages */
 	MSI_FLAG_LEVEL_CAPABLE		= (1 << 6),
+	/* Populate sysfs on alloc() and destroy it on free() */
+	MSI_FLAG_DEV_SYSFS		= (1 << 7),
 };
 
 int msi_domain_set_affinity(struct irq_data *data, const struct cpumask *mask,
--- a/kernel/irq/msi.c
+++ b/kernel/irq/msi.c
@@ -214,6 +214,20 @@ const struct attribute_group **msi_popul
 }
 
 /**
+ * msi_device_populate_sysfs - Populate msi_irqs sysfs entries for a device
+ * @dev:	The device(PCI, platform etc) which will get sysfs entries
+ */
+int msi_device_populate_sysfs(struct device *dev)
+{
+	const struct attribute_group **group = msi_populate_sysfs(dev);
+
+	if (IS_ERR(group))
+		return PTR_ERR(group);
+	dev->msi.data->attrs = group;
+	return 0;
+}
+
+/**
  * msi_destroy_sysfs - Destroy msi_irqs sysfs entries for devices
  * @dev:		The device(PCI, platform etc) who will remove sysfs entries
  * @msi_irq_groups:	attribute_group for device msi_irqs entries
@@ -239,6 +253,17 @@ void msi_destroy_sysfs(struct device *de
 		kfree(msi_irq_groups);
 	}
 }
+
+/**
+ * msi_device_destroy_sysfs - Destroy msi_irqs sysfs entries for a device
+ * @dev:		The device(PCI, platform etc) for which to remove
+ *			sysfs entries
+ */
+void msi_device_destroy_sysfs(struct device *dev)
+{
+	msi_destroy_sysfs(dev, dev->msi.data->attrs);
+	dev->msi.data->attrs = NULL;
+}
 #endif
 
 #ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN
@@ -686,8 +711,19 @@ int msi_domain_alloc_irqs(struct irq_dom
 {
 	struct msi_domain_info *info = domain->host_data;
 	struct msi_domain_ops *ops = info->ops;
+	int ret;
 
-	return ops->domain_alloc_irqs(domain, dev, nvec);
+	ret = ops->domain_alloc_irqs(domain, dev, nvec);
+	if (ret)
+		return ret;
+
+	if (!(info->flags & MSI_FLAG_DEV_SYSFS))
+		return 0;
+
+	ret = msi_device_populate_sysfs(dev);
+	if (ret)
+		msi_domain_free_irqs(domain, dev);
+	return ret;
 }
 
 void __msi_domain_free_irqs(struct irq_domain *domain, struct device *dev)
@@ -726,7 +762,9 @@ void msi_domain_free_irqs(struct irq_dom
 	struct msi_domain_info *info = domain->host_data;
 	struct msi_domain_ops *ops = info->ops;
 
-	return ops->domain_free_irqs(domain, dev);
+	if (info->flags & MSI_FLAG_DEV_SYSFS)
+		msi_device_destroy_sysfs(dev);
+	ops->domain_free_irqs(domain, dev);
 }
 
 /**


WARNING: multiple messages have this Message-ID
From: Thomas Gleixner <tglx@linutronix.de>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Bjorn Helgaas <helgaas@kernel.org>, Marc Zygnier <maz@kernel.org>,
	Alex Williamson <alex.williamson@redhat.com>,
	Kevin Tian <kevin.tian@intel.com>,
	Jason Gunthorpe <jgg@nvidia.com>, Megha Dey <megha.dey@intel.com>,
	Ashok Raj <ashok.raj@intel.com>,
	linux-pci@vger.kernel.org,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Santosh Shilimkar <ssantosh@kernel.org>,
	iommu@lists.linux-foundation.org, dmaengine@vger.kernel.org,
	Stuart Yoder <stuyoder@gmail.com>,
	Laurentiu Tudor <laurentiu.tudor@nxp.com>,
	Nishanth Menon <nm@ti.com>, Tero Kristo <kristo@kernel.org>,
	linux-arm-kernel@lists.infradead.org, x86@kernel.org,
	Vinod Koul <vkoul@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Will Deacon <will@kernel.org>, Sinan Kaya <okaya@kernel.org>
Subject: [patch 08/37] genirq/msi: Provide msi_device_populate/destroy_sysfs()
Date: Sat, 27 Nov 2021 02:21:30 +0100 (CET)	[thread overview]
Message-ID: <20211126230524.416227100@linutronix.de> (raw)
Message-ID: <20211127012130.wCm5tMp7squtaSrBH8ZxEUZ33fR843zk6dPqOXhCRj8@z> (raw)
In-Reply-To: <20211126224100.303046749@linutronix.de>

Add new allocation functions which can be activated by domain info
flags. They store the groups pointer in struct msi_device_data.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 include/linux/msi.h |   12 +++++++++++-
 kernel/irq/msi.c    |   42 ++++++++++++++++++++++++++++++++++++++++--
 2 files changed, 51 insertions(+), 3 deletions(-)

--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -174,9 +174,11 @@ struct msi_desc {
 /**
  * msi_device_data - MSI per device data
  * @lock:		Spinlock to protect register access
+ * @attrs:		Pointer to the sysfs attribute group
  */
 struct msi_device_data {
-	raw_spinlock_t		lock;
+	raw_spinlock_t			lock;
+	const struct attribute_group    **attrs;
 };
 
 int msi_setup_device_data(struct device *dev);
@@ -242,10 +244,16 @@ void pci_msi_mask_irq(struct irq_data *d
 void pci_msi_unmask_irq(struct irq_data *data);
 
 #ifdef CONFIG_SYSFS
+int msi_device_populate_sysfs(struct device *dev);
+void msi_device_destroy_sysfs(struct device *dev);
+
 const struct attribute_group **msi_populate_sysfs(struct device *dev);
 void msi_destroy_sysfs(struct device *dev,
 		       const struct attribute_group **msi_irq_groups);
 #else
+static inline int msi_device_populate_sysfs(struct device *dev) { return 0; }
+static inline void msi_device_destroy_sysfs(struct device *dev) { }
+
 static inline const struct attribute_group **msi_populate_sysfs(struct device *dev)
 {
 	return NULL;
@@ -393,6 +401,8 @@ enum {
 	MSI_FLAG_MUST_REACTIVATE	= (1 << 5),
 	/* Is level-triggered capable, using two messages */
 	MSI_FLAG_LEVEL_CAPABLE		= (1 << 6),
+	/* Populate sysfs on alloc() and destroy it on free() */
+	MSI_FLAG_DEV_SYSFS		= (1 << 7),
 };
 
 int msi_domain_set_affinity(struct irq_data *data, const struct cpumask *mask,
--- a/kernel/irq/msi.c
+++ b/kernel/irq/msi.c
@@ -214,6 +214,20 @@ const struct attribute_group **msi_popul
 }
 
 /**
+ * msi_device_populate_sysfs - Populate msi_irqs sysfs entries for a device
+ * @dev:	The device(PCI, platform etc) which will get sysfs entries
+ */
+int msi_device_populate_sysfs(struct device *dev)
+{
+	const struct attribute_group **group = msi_populate_sysfs(dev);
+
+	if (IS_ERR(group))
+		return PTR_ERR(group);
+	dev->msi.data->attrs = group;
+	return 0;
+}
+
+/**
  * msi_destroy_sysfs - Destroy msi_irqs sysfs entries for devices
  * @dev:		The device(PCI, platform etc) who will remove sysfs entries
  * @msi_irq_groups:	attribute_group for device msi_irqs entries
@@ -239,6 +253,17 @@ void msi_destroy_sysfs(struct device *de
 		kfree(msi_irq_groups);
 	}
 }
+
+/**
+ * msi_device_destroy_sysfs - Destroy msi_irqs sysfs entries for a device
+ * @dev:		The device(PCI, platform etc) for which to remove
+ *			sysfs entries
+ */
+void msi_device_destroy_sysfs(struct device *dev)
+{
+	msi_destroy_sysfs(dev, dev->msi.data->attrs);
+	dev->msi.data->attrs = NULL;
+}
 #endif
 
 #ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN
@@ -686,8 +711,19 @@ int msi_domain_alloc_irqs(struct irq_dom
 {
 	struct msi_domain_info *info = domain->host_data;
 	struct msi_domain_ops *ops = info->ops;
+	int ret;
 
-	return ops->domain_alloc_irqs(domain, dev, nvec);
+	ret = ops->domain_alloc_irqs(domain, dev, nvec);
+	if (ret)
+		return ret;
+
+	if (!(info->flags & MSI_FLAG_DEV_SYSFS))
+		return 0;
+
+	ret = msi_device_populate_sysfs(dev);
+	if (ret)
+		msi_domain_free_irqs(domain, dev);
+	return ret;
 }
 
 void __msi_domain_free_irqs(struct irq_domain *domain, struct device *dev)
@@ -726,7 +762,9 @@ void msi_domain_free_irqs(struct irq_dom
 	struct msi_domain_info *info = domain->host_data;
 	struct msi_domain_ops *ops = info->ops;
 
-	return ops->domain_free_irqs(domain, dev);
+	if (info->flags & MSI_FLAG_DEV_SYSFS)
+		msi_device_destroy_sysfs(dev);
+	ops->domain_free_irqs(domain, dev);
 }
 
 /**


  parent reply	other threads:[~2021-11-27  1:23 UTC|newest]

Thread overview: 97+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-27  1:20 [patch 00/37] genirq/msi, PCI/MSI: Spring cleaning - Part 2 Thomas Gleixner
2021-11-27  1:20 ` [patch 01/37] device: Move MSI related data into a struct Thomas Gleixner
2021-11-27  1:21   ` Thomas Gleixner
2021-11-27 12:11   ` Greg Kroah-Hartman
2021-11-27  1:20 ` [patch 02/37] device: Add device::msi_data pointer and struct msi_device_data Thomas Gleixner
2021-11-27  1:21   ` Thomas Gleixner
2021-11-27 12:12   ` Greg Kroah-Hartman
2021-11-28  0:14   ` Jason Gunthorpe
2021-11-28 19:09     ` Thomas Gleixner
2021-11-27  1:20 ` [patch 03/37] PCI/MSI: Allocate MSI device data on first use Thomas Gleixner
2021-11-27  1:21   ` Thomas Gleixner
2021-11-27  1:20 ` [patch 05/37] platform-msi: " Thomas Gleixner
2021-11-27  1:21   ` Thomas Gleixner
2021-11-27  1:20 ` [patch 06/37] bus: fsl-mc-msi: " Thomas Gleixner
2021-11-27  1:21   ` Thomas Gleixner
2021-11-27  1:20 ` [patch 07/37] soc: ti: ti_sci_inta_msi: " Thomas Gleixner
2021-11-27  1:21   ` Thomas Gleixner
2021-11-27  1:20 ` Thomas Gleixner [this message]
2021-11-27  1:21   ` [patch 08/37] genirq/msi: Provide msi_device_populate/destroy_sysfs() Thomas Gleixner
2021-11-30 11:53   ` Jonathan Cameron
2021-11-27  1:20 ` [patch 09/37] PCI/MSI: Let the irq code handle sysfs groups Thomas Gleixner
2021-11-27  1:21   ` Thomas Gleixner
2021-11-27  1:20 ` [patch 10/37] platform-msi: Let the core " Thomas Gleixner
2021-11-27  1:21   ` Thomas Gleixner
2021-11-27  1:20 ` [patch 11/37] genirq/msi: Remove the original sysfs interfaces Thomas Gleixner
2021-11-27  1:21   ` Thomas Gleixner
2021-11-27  1:20 ` [patch 12/37] platform-msi: Rename functions and clarify comments Thomas Gleixner
2021-11-27  1:21   ` Thomas Gleixner
2021-11-27  1:20 ` [patch 13/37] platform-msi: Store platform private data pointer in msi_device_data Thomas Gleixner
2021-11-27  1:21   ` Thomas Gleixner
2021-11-27  1:20 ` [patch 14/37] genirq/msi: Consolidate MSI descriptor data Thomas Gleixner
2021-11-27  1:21   ` Thomas Gleixner
2021-11-27  1:20 ` [patch 15/37] platform-msi: Use msi_desc::msi_index Thomas Gleixner
2021-11-27  1:21   ` Thomas Gleixner
2021-11-27  1:20 ` [patch 16/37] bus: fsl-mc-msi: " Thomas Gleixner
2021-11-27  1:21   ` Thomas Gleixner
2021-11-27  1:20 ` [patch 17/37] soc: ti: ti_sci_inta_msi: " Thomas Gleixner
2021-11-27  1:21   ` Thomas Gleixner
2021-11-27  1:20 ` [patch 18/37] PCI/MSI: " Thomas Gleixner
2021-11-27  1:21   ` Thomas Gleixner
2021-11-27  1:20 ` [patch 19/37] genirq/msi: Add msi_device_data::properties Thomas Gleixner
2021-11-27  1:21   ` Thomas Gleixner
2021-11-27  1:20 ` [patch 20/37] PCI/MSI: Store properties in device::msi::data Thomas Gleixner
2021-11-27  1:21   ` Thomas Gleixner
2021-11-27  1:20 ` [patch 21/37] x86/pci/XEN: Use device MSI properties Thomas Gleixner
2021-11-27  1:21   ` Thomas Gleixner
2021-11-27  1:20 ` [patch 22/37] x86/apic/msi: " Thomas Gleixner
2021-11-27  1:21   ` Thomas Gleixner
2021-11-27  1:20 ` [patch 23/37] genirq/msi: " Thomas Gleixner
2021-11-27  1:21   ` Thomas Gleixner
2021-11-27  1:20 ` [patch 24/37] powerpc/cell/axon_msi: Use MSI device properties Thomas Gleixner
2021-11-27  1:21   ` Thomas Gleixner
2021-11-27  1:20 ` [patch 25/37] powerpc/pseries/msi: " Thomas Gleixner
2021-11-27  1:21   ` Thomas Gleixner
2021-11-27  1:20 ` [patch 26/37] PCI/MSI: Provide MSI_FLAG_MSIX_CONTIGUOUS Thomas Gleixner
2021-11-27  1:21   ` Thomas Gleixner
2021-11-27  1:20 ` [patch 27/37] powerpc/pseries/msi: Let core code check for contiguous entries Thomas Gleixner
2021-11-27  1:22   ` Thomas Gleixner
2021-11-27  1:20 ` [patch 28/37] genirq/msi: Provide interface to retrieve Linux interrupt number Thomas Gleixner
2021-11-27  1:22   ` Thomas Gleixner
2021-11-27  1:20 ` [patch 29/37] PCI/MSI: Use __msi_get_virq() in pci_get_vector() Thomas Gleixner
2021-11-27  1:22   ` Thomas Gleixner
2021-11-28 19:37   ` Marc Zyngier
2021-11-28 21:00     ` Thomas Gleixner
2021-11-27  1:20 ` [patch 30/37] PCI/MSI: Simplify pci_irq_get_affinity() Thomas Gleixner
2021-11-27  1:22   ` Thomas Gleixner
2021-11-27  1:20 ` [patch 31/37] dmaengine: mv_xor_v2: Get rid of msi_desc abuse Thomas Gleixner
2021-11-27  1:22   ` Thomas Gleixner
2021-11-27  1:20 ` [patch 32/37] perf/smmuv3: Use msi_get_virq() Thomas Gleixner
2021-11-27  1:22   ` Thomas Gleixner
2021-11-27  1:20 ` [patch 33/37] iommu/arm-smmu-v3: " Thomas Gleixner
2021-11-27  1:22   ` Thomas Gleixner
2021-11-29 10:55   ` Will Deacon
2021-11-29 12:52     ` Thomas Gleixner
2021-11-29 12:58       ` Thomas Gleixner
2021-11-29 13:13     ` Robin Murphy
2021-11-29 14:42       ` Thomas Gleixner
2021-11-29 14:54         ` Robin Murphy
2021-11-30  9:36           ` Will Deacon
2021-11-30 12:30             ` Thomas Gleixner
2021-11-29 13:25   ` Robin Murphy
2021-11-27  1:21 ` [patch 34/37] mailbox: bcm-flexrm-mailbox: Rework MSI interrupt handling Thomas Gleixner
2021-11-27  1:22   ` Thomas Gleixner
2021-11-27  1:21 ` [patch 35/37] bus: fsl-mc: fsl-mc-allocator: Rework MSI handling Thomas Gleixner
2021-11-27  1:22   ` Thomas Gleixner
2021-11-27  1:21 ` [patch 36/37] soc: ti: ti_sci_inta_msi: Get rid of ti_sci_inta_msi_get_virq() Thomas Gleixner
2021-11-27  1:22   ` Thomas Gleixner
2021-11-27  1:21 ` [patch 37/37] dmaengine: qcom_hidma: Cleanup MSI handling Thomas Gleixner
2021-11-27  1:22   ` Thomas Gleixner
2021-11-29 19:56   ` Sinan Kaya
2021-11-27  1:21 ` [patch 00/37] genirq/msi, PCI/MSI: Spring cleaning - Part 2 Thomas Gleixner
2021-11-27  1:21 ` [patch 04/37] PCI/MSI: Use lock from msi_device_data Thomas Gleixner
2021-11-27  1:20   ` Thomas Gleixner
2021-11-27 12:13   ` Greg Kroah-Hartman
2021-11-27 12:17 ` [patch 00/37] genirq/msi, PCI/MSI: Spring cleaning - Part 2 Greg Kroah-Hartman
2021-11-28  0:39 ` Jason Gunthorpe
2021-11-28 20:27   ` Thomas Gleixner

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