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, Cedric Le Goater <clg@kaod.org>,
xen-devel@lists.xenproject.org, Juergen Gross <jgross@suse.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Will Deacon <will@kernel.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,
Vinod Koul <vkoul@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Robin Murphy <robin.murphy@arm.com>,
Sinan Kaya <okaya@kernel.org>
Subject: [patch V2 02/36] device: Add device::msi_data pointer and struct msi_device_data
Date: Mon, 6 Dec 2021 23:38:59 +0100 (CET) [thread overview]
Message-ID: <20211206210437.765721147@linutronix.de> (raw)
In-Reply-To: 20211206210307.625116253@linutronix.de
Create struct msi_device_data and add a pointer of that type to struct
dev_msi_info, which is part of struct device. Provide an allocator function
which can be invoked from the MSI interrupt allocation code pathes.
Add a properties field to the data structure as a first member so the
allocation size is not zero bytes. The field will be uses later on.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
---
include/linux/device.h | 5 +++++
include/linux/msi.h | 18 ++++++++++++++++++
kernel/irq/msi.c | 32 ++++++++++++++++++++++++++++++++
3 files changed, 55 insertions(+)
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -45,6 +45,7 @@ struct iommu_ops;
struct iommu_group;
struct dev_pin_info;
struct dev_iommu;
+struct msi_device_data;
/**
* struct subsys_interface - interfaces to device functions
@@ -374,11 +375,15 @@ struct dev_links_info {
/**
* struct dev_msi_info - Device data related to MSI
* @domain: The MSI interrupt domain associated to the device
+ * @data: Pointer to MSI device data
*/
struct dev_msi_info {
#ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN
struct irq_domain *domain;
#endif
+#ifdef CONFIG_GENERIC_MSI_IRQ
+ struct msi_device_data *data;
+#endif
};
/**
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -171,6 +171,16 @@ struct msi_desc {
};
};
+/**
+ * msi_device_data - MSI per device data
+ * @properties: MSI properties which are interesting to drivers
+ */
+struct msi_device_data {
+ unsigned long properties;
+};
+
+int msi_setup_device_data(struct device *dev);
+
/* Helpers to hide struct msi_desc implementation details */
#define msi_desc_to_dev(desc) ((desc)->dev)
#define dev_to_msi_list(dev) (&(dev)->msi_list)
@@ -233,10 +243,16 @@ 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;
@@ -384,6 +400,8 @@ 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
@@ -73,6 +73,38 @@ void get_cached_msi_msg(unsigned int irq
}
EXPORT_SYMBOL_GPL(get_cached_msi_msg);
+static void msi_device_data_release(struct device *dev, void *res)
+{
+ WARN_ON_ONCE(!list_empty(&dev->msi_list));
+ dev->msi.data = NULL;
+}
+
+/**
+ * msi_setup_device_data - Setup MSI device data
+ * @dev: Device for which MSI device data should be set up
+ *
+ * Return: 0 on success, appropriate error code otherwise
+ *
+ * This can be called more than once for @dev. If the MSI device data is
+ * already allocated the call succeeds. The allocated memory is
+ * automatically released when the device is destroyed.
+ */
+int msi_setup_device_data(struct device *dev)
+{
+ struct msi_device_data *md;
+
+ if (dev->msi.data)
+ return 0;
+
+ md = devres_alloc(msi_device_data_release, sizeof(*md), GFP_KERNEL);
+ if (!md)
+ return -ENOMEM;
+
+ dev->msi.data = md;
+ devres_add(dev, md);
+ return 0;
+}
+
#ifdef CONFIG_SYSFS
static ssize_t msi_mode_show(struct device *dev, struct device_attribute *attr,
char *buf)
next prev parent reply other threads:[~2021-12-06 22:39 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-06 22:38 [patch V2 00/36] genirq/msi, PCI/MSI: Spring cleaning - Part 2 Thomas Gleixner
2021-12-06 22:38 ` [patch V2 01/36] device: Move MSI related data into a struct Thomas Gleixner
2021-12-06 22:38 ` Thomas Gleixner [this message]
2021-12-06 22:39 ` [patch V2 03/36] PCI/MSI: Allocate MSI device data on first use Thomas Gleixner
2021-12-07 21:03 ` Bjorn Helgaas
2021-12-06 22:39 ` [patch V2 04/36] platform-msi: " Thomas Gleixner
2021-12-06 22:39 ` [patch V2 05/36] bus: fsl-mc-msi: " Thomas Gleixner
2021-12-06 22:39 ` [patch V2 06/36] soc: ti: ti_sci_inta_msi: " Thomas Gleixner
2021-12-06 22:39 ` [patch V2 07/36] genirq/msi: Provide msi_device_populate/destroy_sysfs() Thomas Gleixner
2021-12-06 22:39 ` [patch V2 08/36] PCI/MSI: Let the irq code handle sysfs groups Thomas Gleixner
2021-12-07 21:04 ` Bjorn Helgaas
2021-12-06 22:39 ` [patch V2 09/36] platform-msi: Let the core " Thomas Gleixner
2021-12-06 22:39 ` [patch V2 10/36] genirq/msi: Remove the original sysfs interfaces Thomas Gleixner
2021-12-06 22:39 ` [patch V2 11/36] platform-msi: Rename functions and clarify comments Thomas Gleixner
2021-12-06 22:39 ` [patch V2 12/36] platform-msi: Store platform private data pointer in msi_device_data Thomas Gleixner
2021-12-06 22:39 ` [patch V2 13/36] genirq/msi: Consolidate MSI descriptor data Thomas Gleixner
2021-12-06 22:39 ` [patch V2 14/36] platform-msi: Use msi_desc::msi_index Thomas Gleixner
2021-12-06 22:39 ` [patch V2 15/36] bus: fsl-mc-msi: " Thomas Gleixner
2021-12-06 22:39 ` [patch V2 16/36] soc: ti: ti_sci_inta_msi: " Thomas Gleixner
2021-12-06 22:39 ` [patch V2 17/36] PCI/MSI: " Thomas Gleixner
2021-12-07 21:04 ` Bjorn Helgaas
2021-12-06 22:39 ` [patch V2 18/36] genirq/msi: Add msi_device_data::properties Thomas Gleixner
2021-12-07 7:52 ` Greg Kroah-Hartman
2021-12-07 9:04 ` Cédric Le Goater
2021-12-07 12:47 ` Thomas Gleixner
2021-12-07 12:53 ` Thomas Gleixner
2021-12-06 22:39 ` [patch V2 19/36] PCI/MSI: Store properties in device::msi::data Thomas Gleixner
2021-12-07 7:52 ` Greg Kroah-Hartman
2021-12-07 21:05 ` Bjorn Helgaas
2021-12-08 15:58 ` Jason Gunthorpe
2021-12-09 17:53 ` Thomas Gleixner
2021-12-09 21:02 ` Thomas Gleixner
2021-12-06 22:39 ` [patch V2 20/36] x86/pci/XEN: Use device MSI properties Thomas Gleixner
2021-12-08 15:53 ` Jason Gunthorpe
2021-12-08 17:53 ` Thomas Gleixner
2021-12-06 22:39 ` [patch V2 21/36] x86/apic/msi: " Thomas Gleixner
2021-12-08 15:45 ` Jason Gunthorpe
2021-12-06 22:39 ` [patch V2 22/36] genirq/msi: " Thomas Gleixner
2021-12-06 22:39 ` [patch V2 23/36] powerpc/cell/axon_msi: Use MSI device properties Thomas Gleixner
2021-12-07 7:52 ` Greg Kroah-Hartman
2021-12-08 15:54 ` Jason Gunthorpe
2021-12-06 22:39 ` [patch V2 24/36] powerpc/pseries/msi: " Thomas Gleixner
2021-12-08 15:51 ` Jason Gunthorpe
2021-12-06 22:39 ` [patch V2 25/36] PCI/MSI: Provide MSI_FLAG_MSIX_CONTIGUOUS Thomas Gleixner
2021-12-07 21:05 ` Bjorn Helgaas
2021-12-06 22:39 ` [patch V2 26/36] powerpc/pseries/msi: Let core code check for contiguous entries Thomas Gleixner
2021-12-07 7:52 ` Greg Kroah-Hartman
2021-12-06 22:39 ` [patch V2 27/36] genirq/msi: Provide interface to retrieve Linux interrupt number Thomas Gleixner
2021-12-07 7:51 ` Greg Kroah-Hartman
2021-12-06 22:39 ` [patch V2 28/36] PCI/MSI: Use __msi_get_virq() in pci_get_vector() Thomas Gleixner
2021-12-07 7:52 ` Greg Kroah-Hartman
2021-12-07 21:05 ` Bjorn Helgaas
2021-12-06 22:39 ` [patch V2 29/36] PCI/MSI: Simplify pci_irq_get_affinity() Thomas Gleixner
2021-12-07 17:42 ` Cédric Le Goater
2021-12-07 21:19 ` Thomas Gleixner
2021-12-06 22:39 ` [patch V2 30/36] dmaengine: mv_xor_v2: Get rid of msi_desc abuse Thomas Gleixner
2021-12-06 22:39 ` [patch V2 31/36] perf/smmuv3: Use msi_get_virq() Thomas Gleixner
2021-12-06 22:39 ` [patch V2 32/36] iommu/arm-smmu-v3: " Thomas Gleixner
2021-12-06 22:39 ` [patch V2 33/36] mailbox: bcm-flexrm-mailbox: Rework MSI interrupt handling Thomas Gleixner
2021-12-06 22:39 ` [patch V2 34/36] bus: fsl-mc: fsl-mc-allocator: Rework MSI handling Thomas Gleixner
2021-12-06 22:39 ` [patch V2 35/36] soc: ti: ti_sci_inta_msi: Get rid of ti_sci_inta_msi_get_virq() Thomas Gleixner
2021-12-06 22:39 ` [patch V2 36/36] dmaengine: qcom_hidma: Cleanup MSI handling Thomas Gleixner
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