Add helpers to allocate/free useable PCI domain numbers at runtime.
This will be later used by sample devsec code.
Signed-off-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
---
drivers/pci/pci.c | 16 ++++++++++++++--
include/linux/pci.h | 3 +++
2 files changed, 17 insertions(+), 2 deletions(-)
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 869d204a70a3..729bc57e025b 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -6685,6 +6685,18 @@ static void pci_no_domains(void)
static DEFINE_IDA(pci_domain_nr_static_ida);
static DEFINE_IDA(pci_domain_nr_dynamic_ida);
+int pci_alloc_dynamic_domain(void)
+{
+ return ida_alloc(&pci_domain_nr_dynamic_ida, GFP_KERNEL);
+}
+EXPORT_SYMBOL_GPL(pci_alloc_dynamic_domain);
+
+void pci_free_dynamic_domain(int domain)
+{
+ ida_free(&pci_domain_nr_dynamic_ida, domain);
+}
+EXPORT_SYMBOL_GPL(pci_free_dynamic_domain);
+
static void of_pci_reserve_static_domain_nr(void)
{
struct device_node *np;
@@ -6733,7 +6745,7 @@ static int of_pci_bus_find_domain_nr(struct device *parent)
* dynamic allocations to prevent assigning them to other DT nodes
* without static domain.
*/
- return ida_alloc(&pci_domain_nr_dynamic_ida, GFP_KERNEL);
+ return pci_alloc_dynamic_domain();
}
static void of_pci_bus_release_domain_nr(struct device *parent, int domain_nr)
@@ -6745,7 +6757,7 @@ static void of_pci_bus_release_domain_nr(struct device *parent, int domain_nr)
if (of_get_pci_domain_nr(parent->of_node) == domain_nr)
ida_free(&pci_domain_nr_static_ida, domain_nr);
else
- ida_free(&pci_domain_nr_dynamic_ida, domain_nr);
+ pci_free_dynamic_domain(domain_nr);
}
int pci_bus_find_domain_nr(struct pci_bus *bus, struct device *parent)
diff --git a/include/linux/pci.h b/include/linux/pci.h
index c2f18f31f7a7..c040c1d49632 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1934,6 +1934,9 @@ static inline int acpi_pci_bus_find_domain_nr(struct pci_bus *bus)
#endif
int pci_bus_find_domain_nr(struct pci_bus *bus, struct device *parent);
void pci_bus_release_domain_nr(struct device *parent, int domain_nr);
+int pci_alloc_dynamic_domain(void);
+void pci_free_dynamic_domain(int domain);
+
#endif
/* Some architectures require additional setup to direct VGA traffic */
--
2.43.0
