diff options
| author | Tushar Dave <tushar.n.dave@oracle.com> | 2016-10-28 10:12:44 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-11-18 11:17:00 -0800 |
| commit | f08978b0fdbf37d3c91efb60a20bdee3ba8f59c6 (patch) | |
| tree | 61a2039e1611d9898c0c23b13e9d95b70430087a /arch/sparc/kernel/pci_sun4v_asm.S | |
| parent | 5116ab4eabed575b7cca61a6e89b7d6fb7440970 (diff) | |
sparc64: Enable sun4v dma ops to use IOMMU v2 APIs
Add Hypervisor IOMMU v2 APIs pci_iotsb_map(), pci_iotsb_demap() and
enable sun4v dma ops to use IOMMU v2 API for all PCIe devices with
64bit DMA mask.
Signed-off-by: Tushar Dave <tushar.n.dave@oracle.com>
Reviewed-by: chris hyser <chris.hyser@oracle.com>
Acked-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/kernel/pci_sun4v_asm.S')
| -rw-r--r-- | arch/sparc/kernel/pci_sun4v_asm.S | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/sparc/kernel/pci_sun4v_asm.S b/arch/sparc/kernel/pci_sun4v_asm.S index 22024a96c317..578f09657916 100644 --- a/arch/sparc/kernel/pci_sun4v_asm.S +++ b/arch/sparc/kernel/pci_sun4v_asm.S @@ -392,3 +392,39 @@ ENTRY(pci_sun4v_iotsb_bind) retl nop ENDPROC(pci_sun4v_iotsb_bind) + + /* + * %o0: devhandle + * %o1: iotsb_num/iotsb_handle + * %o2: index_count + * %o3: iotte_attributes + * %o4: io_page_list_p + * %o5: &mapped + * + * returns %o0: status + * %o1: #mapped + */ +ENTRY(pci_sun4v_iotsb_map) + mov %o5, %g1 + mov HV_FAST_PCI_IOTSB_MAP, %o5 + ta HV_FAST_TRAP + retl + stx %o1, [%g1] +ENDPROC(pci_sun4v_iotsb_map) + + /* + * %o0: devhandle + * %o1: iotsb_num/iotsb_handle + * %o2: iotsb_index + * %o3: #iottes + * %o4: &demapped + * + * returns %o0: status + * %o1: #demapped + */ +ENTRY(pci_sun4v_iotsb_demap) + mov HV_FAST_PCI_IOTSB_DEMAP, %o5 + ta HV_FAST_TRAP + retl + stx %o1, [%o4] +ENDPROC(pci_sun4v_iotsb_demap) |