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bus: fsl-mc-msi: Simplify MSI descriptor handling

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Let the MSI irq domain code handle descriptor allocation and free.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211206210748.847219474@linutronix.de
This commit is contained in:
Thomas Gleixner 2021-12-06 23:51:39 +01:00
parent 7ad321a5ea
commit e8604b1447
1 changed files with 4 additions and 57 deletions
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61
drivers/bus/fsl-mc/fsl-mc-msi.c
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@ -170,6 +170,7 @@ struct irq_domain *fsl_mc_msi_create_irq_domain(struct fwnode_handle *fwnode,
fsl_mc_msi_update_dom_ops(info);
if (info->flags & MSI_FLAG_USE_DEF_CHIP_OPS)
fsl_mc_msi_update_chip_ops(info);
info->flags |= MSI_FLAG_ALLOC_SIMPLE_MSI_DESCS | MSI_FLAG_FREE_MSI_DESCS;
domain = msi_create_irq_domain(fwnode, info, parent);
if (domain)
@ -210,45 +211,7 @@ struct irq_domain *fsl_mc_find_msi_domain(struct device *dev)
return msi_domain;
}
static void fsl_mc_msi_free_descs(struct device *dev)
{
struct msi_desc *desc, *tmp;
list_for_each_entry_safe(desc, tmp, dev_to_msi_list(dev), list) {
list_del(&desc->list);
free_msi_entry(desc);
}
}
static int fsl_mc_msi_alloc_descs(struct device *dev, unsigned int irq_count)
{
unsigned int i;
int error;
struct msi_desc *msi_desc;
for (i = 0; i < irq_count; i++) {
msi_desc = alloc_msi_entry(dev, 1, NULL);
if (!msi_desc) {
dev_err(dev, "Failed to allocate msi entry\n");
error = -ENOMEM;
goto cleanup_msi_descs;
}
msi_desc->msi_index = i;
INIT_LIST_HEAD(&msi_desc->list);
list_add_tail(&msi_desc->list, dev_to_msi_list(dev));
}
return 0;
cleanup_msi_descs:
fsl_mc_msi_free_descs(dev);
return error;
}
int fsl_mc_msi_domain_alloc_irqs(struct device *dev,
unsigned int irq_count)
int fsl_mc_msi_domain_alloc_irqs(struct device *dev, unsigned int irq_count)
{
struct irq_domain *msi_domain;
int error;
@ -261,28 +224,17 @@ int fsl_mc_msi_domain_alloc_irqs(struct device *dev,
if (error)
return error;
if (!list_empty(dev_to_msi_list(dev)))
if (msi_first_desc(dev, MSI_DESC_ALL))
return -EINVAL;
error = fsl_mc_msi_alloc_descs(dev, irq_count);
if (error < 0)
return error;
/*
* NOTE: Calling this function will trigger the invocation of the
* its_fsl_mc_msi_prepare() callback
*/
error = msi_domain_alloc_irqs(msi_domain, dev, irq_count);
if (error) {
if (error)
dev_err(dev, "Failed to allocate IRQs\n");
goto cleanup_msi_descs;
}
return 0;
cleanup_msi_descs:
fsl_mc_msi_free_descs(dev);
return error;
}
@ -295,9 +247,4 @@ void fsl_mc_msi_domain_free_irqs(struct device *dev)
return;
msi_domain_free_irqs(msi_domain, dev);
if (list_empty(dev_to_msi_list(dev)))
return;
fsl_mc_msi_free_descs(dev);
}