kybaaz/linux-xiaomi-chiron
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

device: Add device:: Msi_data pointer and struct msi_device_data

Browse source 
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>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211210221813.676660809@linutronix.de
This commit is contained in:
Thomas Gleixner 2021-12-10 23:18:55 +01:00
parent 34fff62827
commit 013bd8e543
3 changed files with 55 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

5
include/linux/device.h
View file

@ -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
};
/**

18
include/linux/msi.h
View file

@ -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 *data);
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,