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| author | Ray Jui <ray.jui@broadcom.com> | 2016-10-31 17:38:39 -0700 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2016-11-17 14:40:37 -0600 |
| commit | dd9d4e7498de37d79f00cfe562db1daf77bc2651 (patch) | |
| tree | 65eeb77e160e2018f758be89b04c1b830c9f7dd6 /drivers/pci/host/pcie-iproc.h | |
| parent | 3589c66cca7f0fd76861b40e7ca7d01c82bfe9c3 (diff) | |
| download | linux-dd9d4e7498de37d79f00cfe562db1daf77bc2651.tar.bz2 | |
PCI: iproc: Add inbound DMA mapping support
Add support for inbound DMA mapping. The range of the inbound mapping is
configured by the optional device tree property 'dma-ranges'.
While inbound mapping is done automatically in the ASIC on most iProc-based
SoCs, newer ASICs (e.g., Stingray) require inbound mapping to be configured
explicitly in software.
[bhelgaas: fold in fixes to avoid 32-bit division in iproc_pcie_ib_write()
and uninitialized return value in iproc_pcie_setup_ib() from Arnd Bergmann
<arnd@arndb.de>]
Signed-off-by: Oza Oza <oza.oza@broadcom.com>
Signed-off-by: Ray Jui <ray.jui@broadcom.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Scott Branden <scott.branden@broadcom.com>
Diffstat (limited to 'drivers/pci/host/pcie-iproc.h')
| -rw-r--r-- | drivers/pci/host/pcie-iproc.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/pci/host/pcie-iproc.h b/drivers/pci/host/pcie-iproc.h index 861b526c171b..3f2709af1a50 100644 --- a/drivers/pci/host/pcie-iproc.h +++ b/drivers/pci/host/pcie-iproc.h @@ -41,7 +41,16 @@ struct iproc_pcie_ob { unsigned int nr_windows; }; +/** + * iProc PCIe inbound mapping + * @nr_regions: total number of supported inbound mapping regions + */ +struct iproc_pcie_ib { + unsigned int nr_regions; +}; + struct iproc_pcie_ob_map; +struct iproc_pcie_ib_map; struct iproc_msi; /** @@ -64,6 +73,9 @@ struct iproc_msi; * @ob: outbound mapping related parameters * @ob_map: outbound mapping related parameters specific to the controller * + * @ib: inbound mapping related parameters + * @ib_map: outbound mapping region related parameters + * * @need_msi_steer: indicates additional configuration of the iProc PCIe * controller is required to steer MSI writes to external interrupt controller * @msi: MSI data @@ -87,6 +99,9 @@ struct iproc_pcie { struct iproc_pcie_ob ob; const struct iproc_pcie_ob_map *ob_map; + struct iproc_pcie_ib ib; + const struct iproc_pcie_ib_map *ib_map; + bool need_msi_steer; struct iproc_msi *msi; }; |