MdeModulePkg/NonDiscoverablePciDeviceDxe: Add comments for functions
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Ruiyu Ni <ruiyu.ni@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Dandan Bi <dandan.bi@intel.com> Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>
This commit is contained in:
Dandan Bi
Hao Wu
@@ -28,9 +28,14 @@ typedef struct {
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UINTN NumberOfBytes;
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} NON_DISCOVERABLE_PCI_DEVICE_MAP_INFO;
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//
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// Get the resource associated with BAR number 'BarIndex'.
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//
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/**
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Get the resource associated with BAR number 'BarIndex'.
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@param Dev Point to the NON_DISCOVERABLE_PCI_DEVICE instance.
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@param BarIndex The BAR index of the standard PCI Configuration header to use as the
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base address for the memory operation to perform.
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@param Descriptor Points to the address space descriptor
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**/
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STATIC
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EFI_STATUS
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GetBarResource (
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@@ -61,6 +66,21 @@ GetBarResource (
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return EFI_NOT_FOUND;
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}
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/**
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Reads from the memory space of a PCI controller. Returns either when the polling exit criteria is
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satisfied or after a defined duration.
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@param This A pointer to the EFI_PCI_IO_PROTOCOL instance.
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@param Width Signifies the width of the memory or I/O operations.
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@param BarIndex The BAR index of the standard PCI Configuration header to use as the
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base address for the memory operation to perform.
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@param Offset The offset within the selected BAR to start the memory operation.
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@param Mask Mask used for the polling criteria.
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@param Value The comparison value used for the polling exit criteria.
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@param Delay The number of 100 ns units to poll.
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@param Result Pointer to the last value read from the memory location.
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**/
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STATIC
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EFI_STATUS
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EFIAPI
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@@ -79,6 +99,21 @@ PciIoPollMem (
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return EFI_UNSUPPORTED;
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}
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/**
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Reads from the memory space of a PCI controller. Returns either when the polling exit criteria is
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satisfied or after a defined duration.
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@param This A pointer to the EFI_PCI_IO_PROTOCOL instance.
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@param Width Signifies the width of the memory or I/O operations.
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@param BarIndex The BAR index of the standard PCI Configuration header to use as the
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base address for the memory operation to perform.
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@param Offset The offset within the selected BAR to start the memory operation.
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@param Mask Mask used for the polling criteria.
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@param Value The comparison value used for the polling exit criteria.
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@param Delay The number of 100 ns units to poll.
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@param Result Pointer to the last value read from the memory location.
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**/
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STATIC
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EFI_STATUS
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EFIAPI
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@@ -97,6 +132,22 @@ PciIoPollIo (
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return EFI_UNSUPPORTED;
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}
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/**
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Enable a PCI driver to access PCI controller registers in the PCI memory or I/O space.
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@param Width Signifies the width of the memory or I/O operations.
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@param Count The number of memory or I/O operations to perform.
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@param DstStride The stride of the destination buffer.
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@param Dst For read operations, the destination buffer to store the results. For write
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operations, the destination buffer to write data to.
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@param SrcStride The stride of the source buffer.
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@param Src For read operations, the source buffer to read data from. For write
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operations, the source buffer to write data from.
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@retval EFI_SUCCESS The data was read from or written to the PCI controller.
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@retval EFI_INVALID_PARAMETER One or more parameters are invalid.
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**/
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STATIC
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EFI_STATUS
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EFIAPI
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@@ -148,6 +199,26 @@ PciIoMemRW (
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return EFI_SUCCESS;
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}
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/**
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Enable a PCI driver to access PCI controller registers in the PCI memory or I/O space.
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@param This A pointer to the EFI_PCI_IO_PROTOCOL instance.
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@param Width Signifies the width of the memory or I/O operations.
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@param BarIndex The BAR index of the standard PCI Configuration header to use as the
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base address for the memory or I/O operation to perform.
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@param Offset The offset within the selected BAR to start the memory or I/O operation.
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@param Count The number of memory or I/O operations to perform.
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@param Buffer For read operations, the destination buffer to store the results. For write
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operations, the source buffer to write data from.
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@retval EFI_SUCCESS The data was read from or written to the PCI controller.
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@retval EFI_UNSUPPORTED BarIndex not valid for this PCI controller.
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@retval EFI_UNSUPPORTED The address range specified by Offset, Width, and Count is not
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valid for the PCI BAR specified by BarIndex.
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@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.
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@retval EFI_INVALID_PARAMETER One or more parameters are invalid.
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**/
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STATIC
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EFI_STATUS
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EFIAPI
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@@ -215,6 +286,26 @@ PciIoMemRead (
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return EFI_INVALID_PARAMETER;
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}
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/**
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Enable a PCI driver to access PCI controller registers in the PCI memory or I/O space.
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@param This A pointer to the EFI_PCI_IO_PROTOCOL instance.
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@param Width Signifies the width of the memory or I/O operations.
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@param BarIndex The BAR index of the standard PCI Configuration header to use as the
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base address for the memory or I/O operation to perform.
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@param Offset The offset within the selected BAR to start the memory or I/O operation.
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@param Count The number of memory or I/O operations to perform.
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@param Buffer For read operations, the destination buffer to store the results. For write
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operations, the source buffer to write data from.
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@retval EFI_SUCCESS The data was read from or written to the PCI controller.
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@retval EFI_UNSUPPORTED BarIndex not valid for this PCI controller.
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@retval EFI_UNSUPPORTED The address range specified by Offset, Width, and Count is not
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valid for the PCI BAR specified by BarIndex.
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@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.
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@retval EFI_INVALID_PARAMETER One or more parameters are invalid.
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**/
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STATIC
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EFI_STATUS
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EFIAPI
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@@ -282,6 +373,19 @@ PciIoMemWrite (
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return EFI_INVALID_PARAMETER;
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}
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/**
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Enable a PCI driver to access PCI controller registers in the PCI memory or I/O space.
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@param This A pointer to the EFI_PCI_IO_PROTOCOL instance.
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@param Width Signifies the width of the memory or I/O operations.
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@param BarIndex The BAR index of the standard PCI Configuration header to use as the
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base address for the memory or I/O operation to perform.
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@param Offset The offset within the selected BAR to start the memory or I/O operation.
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@param Count The number of memory or I/O operations to perform.
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@param Buffer For read operations, the destination buffer to store the results. For write
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operations, the source buffer to write data from.
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**/
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STATIC
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EFI_STATUS
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EFIAPI
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@@ -298,6 +402,19 @@ PciIoIoRead (
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return EFI_UNSUPPORTED;
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}
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/**
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Enable a PCI driver to access PCI controller registers in the PCI memory or I/O space.
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@param This A pointer to the EFI_PCI_IO_PROTOCOL instance.
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@param Width Signifies the width of the memory or I/O operations.
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@param BarIndex The BAR index of the standard PCI Configuration header to use as the
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base address for the memory or I/O operation to perform.
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@param Offset The offset within the selected BAR to start the memory or I/O operation.
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@param Count The number of memory or I/O operations to perform.
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@param Buffer For read operations, the destination buffer to store the results. For write
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operations, the source buffer to write data from.
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**/
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STATIC
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EFI_STATUS
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EFIAPI
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@@ -314,6 +431,17 @@ PciIoIoWrite (
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return EFI_UNSUPPORTED;
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}
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/**
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Enable a PCI driver to access PCI config space.
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@param This A pointer to the EFI_PCI_IO_PROTOCOL instance.
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@param Width Signifies the width of the memory or I/O operations.
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@param Offset The offset within the selected BAR to start the memory or I/O operation.
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@param Count The number of memory or I/O operations to perform.
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@param Buffer For read operations, the destination buffer to store the results. For write
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operations, the source buffer to write data from.
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**/
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STATIC
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EFI_STATUS
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EFIAPI
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@@ -350,6 +478,22 @@ PciIoPciRead (
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return PciIoMemRW (Width, Count, 1, Buffer, 1, Address);
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}
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/**
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Enable a PCI driver to access PCI config space.
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@param This A pointer to the EFI_PCI_IO_PROTOCOL instance.
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@param Width Signifies the width of the memory or I/O operations.
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@param Offset The offset within the selected BAR to start the memory or I/O operation.
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@param Count The number of memory or I/O operations to perform.
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@param Buffer For read operations, the destination buffer to store the results. For write
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operations, the source buffer to write data from
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@retval EFI_SUCCESS The data was read from or written to the PCI controller.
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@retval EFI_UNSUPPORTED The address range specified by Offset, Width, and Count is not
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valid for the PCI BAR specified by BarIndex.
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@retval EFI_INVALID_PARAMETER One or more parameters are invalid.
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**/
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STATIC
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EFI_STATUS
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EFIAPI
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@@ -378,6 +522,24 @@ PciIoPciWrite (
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return PciIoMemRW (Width, Count, 1, Address, 1, Buffer);
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}
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/**
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Enables a PCI driver to copy one region of PCI memory space to another region of PCI
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memory space.
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@param This A pointer to the EFI_PCI_IO_PROTOCOL instance.
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@param Width Signifies the width of the memory operations.
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@param DestBarIndex The BAR index in the standard PCI Configuration header to use as the
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base address for the memory operation to perform.
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@param DestOffset The destination offset within the BAR specified by DestBarIndex to
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start the memory writes for the copy operation.
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@param SrcBarIndex The BAR index in the standard PCI Configuration header to use as the
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base address for the memory operation to perform.
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@param SrcOffset The source offset within the BAR specified by SrcBarIndex to start
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the memory reads for the copy operation.
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@param Count The number of memory operations to perform. Bytes moved is Width
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size * Count, starting at DestOffset and SrcOffset.
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**/
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STATIC
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EFI_STATUS
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EFIAPI
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@@ -395,6 +557,25 @@ PciIoCopyMem (
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return EFI_UNSUPPORTED;
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}
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/**
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Provides the PCI controller-specific addresses needed to access system memory.
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@param This A pointer to the EFI_PCI_IO_PROTOCOL instance.
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@param Operation Indicates if the bus master is going to read or write to system memory.
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@param HostAddress The system memory address to map to the PCI controller.
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@param NumberOfBytes On input the number of bytes to map. On output the number of bytes
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that were mapped.
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@param DeviceAddress The resulting map address for the bus master PCI controller to use to
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access the hosts HostAddress.
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@param Mapping A resulting value to pass to Unmap().
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@retval EFI_SUCCESS The range was mapped for the returned NumberOfBytes.
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@retval EFI_UNSUPPORTED The HostAddress cannot be mapped as a common buffer.
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@retval EFI_INVALID_PARAMETER One or more parameters are invalid.
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@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.
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@retval EFI_DEVICE_ERROR The system hardware could not map the requested address.
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**/
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STATIC
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EFI_STATUS
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EFIAPI
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@@ -461,6 +642,15 @@ CoherentPciIoMap (
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return EFI_SUCCESS;
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}
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/**
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Completes the Map() operation and releases any corresponding resources.
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@param This A pointer to the EFI_PCI_IO_PROTOCOL instance.
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@param Mapping The mapping value returned from Map().
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@retval EFI_SUCCESS The range was unmapped.
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**/
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STATIC
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EFI_STATUS
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EFIAPI
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@@ -484,6 +674,25 @@ CoherentPciIoUnmap (
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return EFI_SUCCESS;
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}
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/**
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Allocates pages.
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@param This A pointer to the EFI_PCI_IO_PROTOCOL instance.
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@param Type This parameter is not used and must be ignored.
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@param MemoryType The type of memory to allocate, EfiBootServicesData or
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EfiRuntimeServicesData.
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@param Pages The number of pages to allocate.
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@param HostAddress A pointer to store the base system memory address of the
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allocated range.
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@param Attributes The requested bit mask of attributes for the allocated range.
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@retval EFI_SUCCESS The requested memory pages were allocated.
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@retval EFI_UNSUPPORTED Attributes is unsupported. The only legal attribute bits are
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MEMORY_WRITE_COMBINE and MEMORY_CACHED.
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@retval EFI_INVALID_PARAMETER One or more parameters are invalid.
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@retval EFI_OUT_OF_RESOURCES The memory pages could not be allocated.
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**/
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STATIC
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EFI_STATUS
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EFIAPI
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@@ -526,6 +735,16 @@ CoherentPciIoAllocateBuffer (
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return Status;
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}
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/**
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Frees memory that was allocated in function CoherentPciIoAllocateBuffer ().
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@param This A pointer to the EFI_PCI_IO_PROTOCOL instance.
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@param Pages The number of pages to free.
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@param HostAddress The base system memory address of the allocated range.
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@retval EFI_SUCCESS The requested memory pages were freed.
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**/
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STATIC
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EFI_STATUS
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EFIAPI
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@@ -539,6 +758,17 @@ CoherentPciIoFreeBuffer (
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return EFI_SUCCESS;
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}
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/**
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Frees memory that was allocated in function NonCoherentPciIoAllocateBuffer ().
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@param This A pointer to the EFI_PCI_IO_PROTOCOL instance.
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@param Pages The number of pages to free.
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@param HostAddress The base system memory address of the allocated range.
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@retval EFI_SUCCESS The requested memory pages were freed.
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@retval others The operation contain some errors.
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**/
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STATIC
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EFI_STATUS
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EFIAPI
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@@ -604,6 +834,25 @@ FreeAlloc:
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return Status;
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}
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/**
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Allocates pages.
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@param This A pointer to the EFI_PCI_IO_PROTOCOL instance.
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@param Type This parameter is not used and must be ignored.
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@param MemoryType The type of memory to allocate, EfiBootServicesData or
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EfiRuntimeServicesData.
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@param Pages The number of pages to allocate.
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@param HostAddress A pointer to store the base system memory address of the
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allocated range.
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@param Attributes The requested bit mask of attributes for the allocated range.
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@retval EFI_SUCCESS The requested memory pages were allocated.
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@retval EFI_UNSUPPORTED Attributes is unsupported. The only legal attribute bits are
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MEMORY_WRITE_COMBINE and MEMORY_CACHED.
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@retval EFI_INVALID_PARAMETER One or more parameters are invalid.
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@retval EFI_OUT_OF_RESOURCES The memory pages could not be allocated.
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**/
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STATIC
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EFI_STATUS
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EFIAPI
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@@ -702,6 +951,25 @@ FreeBuffer:
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return Status;
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}
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/**
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Provides the PCI controller-specific addresses needed to access system memory.
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@param This A pointer to the EFI_PCI_IO_PROTOCOL instance.
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@param Operation Indicates if the bus master is going to read or write to system memory.
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@param HostAddress The system memory address to map to the PCI controller.
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@param NumberOfBytes On input the number of bytes to map. On output the number of bytes
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that were mapped.
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@param DeviceAddress The resulting map address for the bus master PCI controller to use to
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access the hosts HostAddress.
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@param Mapping A resulting value to pass to Unmap().
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@retval EFI_SUCCESS The range was mapped for the returned NumberOfBytes.
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@retval EFI_UNSUPPORTED The HostAddress cannot be mapped as a common buffer.
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@retval EFI_INVALID_PARAMETER One or more parameters are invalid.
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@retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.
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@retval EFI_DEVICE_ERROR The system hardware could not map the requested address.
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**/
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STATIC
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EFI_STATUS
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EFIAPI
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@@ -816,6 +1084,15 @@ FreeMapInfo:
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return Status;
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}
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/**
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Completes the Map() operation and releases any corresponding resources.
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@param This A pointer to the EFI_PCI_IO_PROTOCOL instance.
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@param Mapping The mapping value returned from Map().
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@retval EFI_SUCCESS The range was unmapped.
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**/
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STATIC
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EFI_STATUS
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EFIAPI
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@@ -859,6 +1136,12 @@ NonCoherentPciIoUnmap (
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return EFI_SUCCESS;
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}
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/**
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Flushes all PCI posted write transactions from a PCI host bridge to system memory.
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@param This A pointer to the EFI_PCI_IO_PROTOCOL instance.
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**/
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STATIC
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EFI_STATUS
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EFIAPI
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@@ -869,6 +1152,19 @@ PciIoFlush (
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return EFI_SUCCESS;
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}
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/**
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Retrieves this PCI controller's current PCI bus number, device number, and function number.
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@param This A pointer to the EFI_PCI_IO_PROTOCOL instance.
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@param SegmentNumber The PCI controller's current PCI segment number.
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@param BusNumber The PCI controller's current PCI bus number.
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@param DeviceNumber The PCI controller's current PCI device number.
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@param FunctionNumber The PCI controller's current PCI function number.
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@retval EFI_SUCCESS The PCI controller location was returned.
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@retval EFI_INVALID_PARAMETER One or more parameters are invalid.
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**/
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STATIC
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EFI_STATUS
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EFIAPI
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@@ -895,6 +1191,25 @@ PciIoGetLocation (
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return EFI_SUCCESS;
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}
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/**
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Performs an operation on the attributes that this PCI controller supports. The operations include
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getting the set of supported attributes, retrieving the current attributes, setting the current
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attributes, enabling attributes, and disabling attributes.
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@param This A pointer to the EFI_PCI_IO_PROTOCOL instance.
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@param Operation The operation to perform on the attributes for this PCI controller.
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@param Attributes The mask of attributes that are used for Set, Enable, and Disable
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operations.
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@param Result A pointer to the result mask of attributes that are returned for the Get
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and Supported operations.
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@retval EFI_SUCCESS The operation on the PCI controller's attributes was completed.
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@retval EFI_INVALID_PARAMETER One or more parameters are invalid.
|
||||
@retval EFI_UNSUPPORTED one or more of the bits set in
|
||||
Attributes are not supported by this PCI controller or one of
|
||||
its parent bridges when Operation is Set, Enable or Disable.
|
||||
|
||||
**/
|
||||
STATIC
|
||||
EFI_STATUS
|
||||
EFIAPI
|
||||
@@ -952,6 +1267,28 @@ PciIoAttributes (
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
||||
/**
|
||||
Gets the attributes that this PCI controller supports setting on a BAR using
|
||||
SetBarAttributes(), and retrieves the list of resource descriptors for a BAR.
|
||||
|
||||
@param This A pointer to the EFI_PCI_IO_PROTOCOL instance.
|
||||
@param BarIndex The BAR index of the standard PCI Configuration header to use as the
|
||||
base address for resource range. The legal range for this field is 0..5.
|
||||
@param Supports A pointer to the mask of attributes that this PCI controller supports
|
||||
setting for this BAR with SetBarAttributes().
|
||||
@param Resources A pointer to the ACPI 2.0 resource descriptors that describe the current
|
||||
configuration of this BAR of the PCI controller.
|
||||
|
||||
@retval EFI_SUCCESS If Supports is not NULL, then the attributes that the PCI
|
||||
controller supports are returned in Supports. If Resources
|
||||
is not NULL, then the ACPI 2.0 resource descriptors that the PCI
|
||||
controller is currently using are returned in Resources.
|
||||
@retval EFI_INVALID_PARAMETER Both Supports and Attributes are NULL.
|
||||
@retval EFI_UNSUPPORTED BarIndex not valid for this PCI controller.
|
||||
@retval EFI_OUT_OF_RESOURCES There are not enough resources available to allocate
|
||||
Resources.
|
||||
|
||||
**/
|
||||
STATIC
|
||||
EFI_STATUS
|
||||
EFIAPI
|
||||
@@ -1003,6 +1340,19 @@ PciIoGetBarAttributes (
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
||||
/**
|
||||
Sets the attributes for a range of a BAR on a PCI controller.
|
||||
|
||||
@param This A pointer to the EFI_PCI_IO_PROTOCOL instance.
|
||||
@param Attributes The mask of attributes to set for the resource range specified by
|
||||
BarIndex, Offset, and Length.
|
||||
@param BarIndex The BAR index of the standard PCI Configuration header to use as the
|
||||
base address for resource range. The legal range for this field is 0..5.
|
||||
@param Offset A pointer to the BAR relative base address of the resource range to be
|
||||
modified by the attributes specified by Attributes.
|
||||
@param Length A pointer to the length of the resource range to be modified by the
|
||||
attributes specified by Attributes.
|
||||
**/
|
||||
STATIC
|
||||
EFI_STATUS
|
||||
EFIAPI
|
||||
@@ -1039,6 +1389,12 @@ STATIC CONST EFI_PCI_IO_PROTOCOL PciIoTemplate =
|
||||
0
|
||||
};
|
||||
|
||||
/**
|
||||
Initialize PciIo Protocol.
|
||||
|
||||
@param Dev Point to NON_DISCOVERABLE_PCI_DEVICE instance.
|
||||
|
||||
**/
|
||||
VOID
|
||||
InitializePciIoProtocol (
|
||||
NON_DISCOVERABLE_PCI_DEVICE *Dev
|
||||
|
||||
Reference in New Issue
Block a user