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powerpc/powernv/ioda: Find opencapi slot for a device node

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Unlike real PCI slots, opencapi slots are directly associated to
the (virtual) opencapi PHB, there's no intermediate bridge. So when
looking for a slot ID, we must start the search from the device node
itself and not its parent.

Also, the slot ID is not attached to a specific bdfn, so let's build
it from the PHB ID, like skiboot.

Signed-off-by: Frederic Barrat <fbarrat@linux.ibm.com>
Reviewed-by: Andrew Donnellan <ajd@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20191121134918.7155-6-fbarrat@linux.ibm.com
This commit is contained in:
Frederic Barrat 2019-11-21 14:49:12 +01:00 • committed by Michael Ellerman
parent f724385fea
commit bbb7890460
2 changed files with 15 additions and 10 deletions
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1
arch/powerpc/include/asm/pnv-pci.h
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@ -15,6 +15,7 @@
#define PCI_SLOT_ID_PREFIX (1UL << 63)
#define PCI_SLOT_ID(phb_id, bdfn) \
(PCI_SLOT_ID_PREFIX | ((uint64_t)(bdfn) << 16) | (phb_id))
#define PCI_PHB_SLOT_ID(phb_id) (phb_id)
extern int pnv_pci_get_slot_id(struct device_node *np, uint64_t *id);
extern int pnv_pci_get_device_tree(uint32_t phandle, void *buf, uint64_t len);