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ocxl: Add AFU interrupt support

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Add user APIs through ioctl to allocate, free, and be notified of an
AFU interrupt.

For opencapi, an AFU can trigger an interrupt on the host by sending a
specific command targeting a 64-bit object handle. On POWER9, this is
implemented by mapping a special page in the address space of a
process and a write to that page will trigger an interrupt.

Signed-off-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Frederic Barrat
2018-01-23 12:31:42 +01:00
committed by Michael Ellerman
parent 5ef3166e8a
commit aeddad1760
8 changed files with 357 additions and 2 deletions
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arch/powerpc/include/asm/pnv-ocxl.h
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@@ -30,4 +30,7 @@ extern int pnv_ocxl_spa_setup(struct pci_dev *dev, void *spa_mem, int PE_mask,
extern void pnv_ocxl_spa_release(void *platform_data);
extern int pnv_ocxl_spa_remove_pe(void *platform_data, int pe_handle);
extern int pnv_ocxl_alloc_xive_irq(u32 *irq, u64 *trigger_addr);
extern void pnv_ocxl_free_xive_irq(u32 irq);
#endif /* _ASM_PNV_OCXL_H */