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irqchip/gicv3-its: platform-msi: Refactor its_pmsi_prepare()

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By adding ACPI support for platform MSI, the gicv3 driver has to
provide code to retrieve the dev id through ACPI instead of device
tree bindings; given that its_pmsi_prepare() allows already to get
the dev id but it is OF dependent, factor OF related code out into
a single function to make its_pmsi_prepare() ready to be used with
other firmware interfaces.

Signed-off-by: Hanjun Guo <[email protected]>
[[email protected]: rewrote commit log]
Signed-off-by: Lorenzo Pieralisi <[email protected]>
Reviewed-by: Matthias Brugger <[email protected]>
Tested-by: Ming Lei <[email protected]>
Tested-by: Wei Xu <[email protected]>
Tested-by: Sinan Kaya <[email protected]>
Cc: Tomasz Nowicki <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Signed-off-by: Marc Zyngier <[email protected]>
This commit is contained in:
Hanjun Guo 2017-03-07 20:40:00 +08:00 • committed by Marc Zyngier
commit 9ab460c228
1 changed files with 16 additions and 7 deletions
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23
drivers/irqchip/irq-gic-v3-its-platform-msi.c
View file

@ -24,15 +24,11 @@ static struct irq_chip its_pmsi_irq_chip = {
.name = "ITS-pMSI",
};
static int its_pmsi_prepare(struct irq_domain *domain, struct device *dev,
int nvec, msi_alloc_info_t *info)
static int of_pmsi_get_dev_id(struct irq_domain *domain, struct device *dev,
u32 *dev_id)
{
struct msi_domain_info *msi_info;
u32 dev_id;
int ret, index = 0;
msi_info = msi_get_domain_info(domain->parent);
/* Suck the DeviceID out of the msi-parent property */
do {
struct of_phandle_args args;
@ -43,11 +39,24 @@ static int its_pmsi_prepare(struct irq_domain *domain, struct device *dev,
if (args.np == irq_domain_get_of_node(domain)) {
if (WARN_ON(args.args_count != 1))
return -EINVAL;
dev_id = args.args[0];
*dev_id = args.args[0];
break;
}
} while (!ret);
return ret;
}
static int its_pmsi_prepare(struct irq_domain *domain, struct device *dev,
int nvec, msi_alloc_info_t *info)
{
struct msi_domain_info *msi_info;
u32 dev_id;
int ret;
msi_info = msi_get_domain_info(domain->parent);
ret = of_pmsi_get_dev_id(domain, dev, &dev_id);
if (ret)
return ret;