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genirq/msi: Make descriptor allocation device domain aware

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Change the descriptor allocation and insertion functions to take a domain
id to prepare for the upcoming multi MSI domain per device support.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20221124230314.163043028@linutronix.de
This commit is contained in:
Thomas Gleixner 2022-11-25 00:24:29 +01:00
parent 1c89396300
commit fc8ab38832
2 changed files with 27 additions and 9 deletions
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16
include/linux/msi.h
View file

@ -286,7 +286,21 @@ static inline void msi_desc_set_iommu_cookie(struct msi_desc *desc,
}
#endif
int msi_insert_msi_desc(struct device *dev, struct msi_desc *init_desc);
int msi_domain_insert_msi_desc(struct device *dev, unsigned int domid,
struct msi_desc *init_desc);
/**
* msi_insert_msi_desc - Allocate and initialize a MSI descriptor in the
* default irqdomain and insert it at @init_desc->msi_index
* @dev: Pointer to the device for which the descriptor is allocated
* @init_desc: Pointer to an MSI descriptor to initialize the new descriptor
*
* Return: 0 on success or an appropriate failure code.
*/
static inline int msi_insert_msi_desc(struct device *dev, struct msi_desc *init_desc)
{
return msi_domain_insert_msi_desc(dev, MSI_DEFAULT_DOMAIN, init_desc);
}
void msi_free_msi_descs_range(struct device *dev, unsigned int first_index, unsigned int last_index);
/**

20
kernel/irq/msi.c
View file

@ -39,7 +39,7 @@ static inline int msi_sysfs_create_group(struct device *dev);
* Return: pointer to allocated &msi_desc on success or %NULL on failure
*/
static struct msi_desc *msi_alloc_desc(struct device *dev, int nvec,
const struct irq_affinity_desc *affinity)
const struct irq_affinity_desc *affinity)
{
struct msi_desc *desc = kzalloc(sizeof(*desc), GFP_KERNEL);
@ -64,9 +64,10 @@ static void msi_free_desc(struct msi_desc *desc)
kfree(desc);
}
static int msi_insert_desc(struct msi_device_data *md, struct msi_desc *desc, unsigned int index)
static int msi_insert_desc(struct msi_device_data *md, struct msi_desc *desc,
unsigned int domid, unsigned int index)
{
struct xarray *xa = &md->__domains[MSI_DEFAULT_DOMAIN].store;
struct xarray *xa = &md->__domains[domid].store;
int ret;
desc->msi_index = index;
@ -77,15 +78,17 @@ static int msi_insert_desc(struct msi_device_data *md, struct msi_desc *desc, un
}
/**
* msi_insert_msi_desc - Allocate and initialize a MSI descriptor and
* insert it at @init_desc->msi_index
* msi_domain_insert_msi_desc - Allocate and initialize a MSI descriptor and
* insert it at @init_desc->msi_index
*
* @dev: Pointer to the device for which the descriptor is allocated
* @domid: The id of the interrupt domain to which the desriptor is added
* @init_desc: Pointer to an MSI descriptor to initialize the new descriptor
*
* Return: 0 on success or an appropriate failure code.
*/
int msi_insert_msi_desc(struct device *dev, struct msi_desc *init_desc)
int msi_domain_insert_msi_desc(struct device *dev, unsigned int domid,
struct msi_desc *init_desc)
{
struct msi_desc *desc;
@ -97,7 +100,8 @@ int msi_insert_msi_desc(struct device *dev, struct msi_desc *init_desc)
/* Copy type specific data to the new descriptor. */
desc->pci = init_desc->pci;
return msi_insert_desc(dev->msi.data, desc, init_desc->msi_index);
return msi_insert_desc(dev->msi.data, desc, domid, init_desc->msi_index);
}
/**
@ -120,7 +124,7 @@ static int msi_add_simple_msi_descs(struct device *dev, unsigned int index, unsi
desc = msi_alloc_desc(dev, 1, NULL);
if (!desc)
goto fail_mem;
ret = msi_insert_desc(dev->msi.data, desc, idx);
ret = msi_insert_desc(dev->msi.data, desc, MSI_DEFAULT_DOMAIN, idx);
if (ret)
goto fail;
}