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s390/pci: add zpci_set_irq()/zpci_clear_irq()

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Pull the directed vs floating IRQ check into common
zpci_set_irq()/zpci_clear_irq() functions and expose them for the rest
of the zPCI subsystem. Furthermore we add a zdev flag bit to easily
check if IRQs are registered. This is needed for use in resetting a zPCI
function.

Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Niklas Schnelle
2020-12-10 15:28:05 +01:00
committed by Vasily Gorbik
parent e2bc3e91d9
commit c1e18c17bd
2 changed files with 42 additions and 11 deletions
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7
arch/s390/include/asm/pci.h
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@@ -133,7 +133,8 @@ struct zpci_dev {
u8 has_resources : 1;
u8 is_physfn : 1;
u8 util_str_avail : 1;
u8 reserved : 3;
u8 irqs_registered : 1;
u8 reserved : 2;
unsigned int devfn; /* DEVFN part of the RID*/
struct mutex lock;
@@ -271,9 +272,13 @@ struct zpci_dev *get_zdev_by_fid(u32);
int zpci_dma_init(void);
void zpci_dma_exit(void);
/* IRQ */
int __init zpci_irq_init(void);
void __init zpci_irq_exit(void);
int zpci_set_irq(struct zpci_dev *zdev);
int zpci_clear_irq(struct zpci_dev *zdev);
/* FMB */
int zpci_fmb_enable_device(struct zpci_dev *);
int zpci_fmb_disable_device(struct zpci_dev *);