diff options
| author | Niklas Cassel <cassel@kernel.org> | 2024-02-16 14:45:15 +0100 |
|---|---|---|
| committer | Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> | 2024-02-16 20:31:10 +0530 |
| commit | 9266514689fe6476423209ee40168db53134101d (patch) | |
| tree | f681039ec7fe691ebfa87bda5e633545ccb17352 /include/linux/pci-epc.h | |
| parent | e01c9797c0ebb307c9bb196c677f6e571335773e (diff) | |
PCI: endpoint: Drop only_64bit on reserved BARs
The definition of a reserved BAR is that EPF drivers should not touch
them.
The definition of only_64bit is that the EPF driver must configure this
BAR as 64-bit. (An EPF driver is not allowed to choose if this BAR should
be configured as 32-bit or 64-bit.)
Thus, it does not make sense to put only_64bit of a BAR that EPF drivers
are not allow to touch.
Drop the only_64bit property from hardware descriptions that are of type
reserved BAR.
Signed-off-by: Niklas Cassel <cassel@kernel.org>
Reviewed-by: Kishon Vijay Abraham I <kishon@kernel.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20240216134524.1142149-3-cassel@kernel.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Diffstat (limited to 'include/linux/pci-epc.h')
| -rw-r--r-- | include/linux/pci-epc.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/pci-epc.h b/include/linux/pci-epc.h index 4ccb4f4f3883..cc2f70d061c8 100644 --- a/include/linux/pci-epc.h +++ b/include/linux/pci-epc.h @@ -164,6 +164,11 @@ enum pci_epc_bar_type { * should be configured as 32-bit or 64-bit, the EPF driver must * configure this BAR as 64-bit. Additionally, the BAR succeeding * this BAR must be set to type BAR_RESERVED. + * + * only_64bit should not be set on a BAR of type BAR_RESERVED. + * (If BARx is a 64-bit BAR that an EPF driver is not allowed to + * touch, then both BARx and BARx+1 must be set to type + * BAR_RESERVED.) */ struct pci_epc_bar_desc { enum pci_epc_bar_type type; |