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| author | Jon Derrick <jonathan.derrick@intel.com> | 2020-01-21 06:37:47 -0700 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2020-01-24 14:55:26 -0600 |
| commit | 2856ba6020fc5cbf051d5a75b2abb3046072c144 (patch) | |
| tree | 0f93f7ebde7349949dcb9b711ba9537dc8c51b95 /include/linux/pci.h | |
| parent | 34067c56fa177d3582695da8e3e162ef78cd0371 (diff) | |
| download | lwn-2856ba6020fc5cbf051d5a75b2abb3046072c144.tar.gz lwn-2856ba6020fc5cbf051d5a75b2abb3046072c144.zip | |
PCI: Introduce pci_real_dma_dev()
The current DMA alias implementation requires the aliased device be on the
same PCI bus as the requester ID. Add an arch-specific mechanism to point
to another PCI device when doing mapping and PCI DMA alias search. The
default case returns the actual device.
Link: https://lore.kernel.org/r/1579613871-301529-4-git-send-email-jonathan.derrick@intel.com
Signed-off-by: Jon Derrick <jonathan.derrick@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'include/linux/pci.h')
| -rw-r--r-- | include/linux/pci.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/pci.h b/include/linux/pci.h index c393dff2d66f..7f4e80666972 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1202,6 +1202,7 @@ int __must_check pci_resize_resource(struct pci_dev *dev, int i, int size); int pci_select_bars(struct pci_dev *dev, unsigned long flags); bool pci_device_is_present(struct pci_dev *pdev); void pci_ignore_hotplug(struct pci_dev *dev); +struct pci_dev *pci_real_dma_dev(struct pci_dev *dev); int __printf(6, 7) pci_request_irq(struct pci_dev *dev, unsigned int nr, irq_handler_t handler, irq_handler_t thread_fn, void *dev_id, |