diff options
| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2016-10-31 15:36:50 +0000 |
|---|---|---|
| committer | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2016-12-07 09:45:56 +0000 |
| commit | a42e6d448d1777dd948de699dd7037ea701987b7 (patch) | |
| tree | 3793db0bae420db7a34793f8d904e24b061372d1 /MdeModulePkg/Bus/Pci/NonDiscoverablePciDeviceDxe/NonDiscoverablePciDeviceIo.h | |
| parent | 1652dc2158de59483788cff6e06169bcf66643f5 (diff) | |
MdeModulePkg: implement generic PCI I/O driver for non-discoverable deviceslinaro-edk2-baseline-2016.12-1
This implements support for non-discoverable PCI compatible devices, i.e,
devices that are not on a PCI bus but that can be controlled by generic PCI
drivers in EDK2.
This is implemented as a UEFI driver, which means we take full advantage
of the UEFI driver model, and only instantiate those devices that are
necessary for booting.
Care is taken to deal with DMA addressing limitations: DMA mappings and
allocations are moved below 4 GB if the PCI driver has not informed us
that the device being driven is 64-bit DMA capable. DMA is implemented as
coherent, support for non-coherent DMA is implemented by a subsequent patch.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>
Tested-by: Marcin Wojtas <mw@semihalf.com>
Diffstat (limited to 'MdeModulePkg/Bus/Pci/NonDiscoverablePciDeviceDxe/NonDiscoverablePciDeviceIo.h')
| -rw-r--r-- | MdeModulePkg/Bus/Pci/NonDiscoverablePciDeviceDxe/NonDiscoverablePciDeviceIo.h | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/MdeModulePkg/Bus/Pci/NonDiscoverablePciDeviceDxe/NonDiscoverablePciDeviceIo.h b/MdeModulePkg/Bus/Pci/NonDiscoverablePciDeviceDxe/NonDiscoverablePciDeviceIo.h new file mode 100644 index 0000000000..bc0a3d3258 --- /dev/null +++ b/MdeModulePkg/Bus/Pci/NonDiscoverablePciDeviceDxe/NonDiscoverablePciDeviceIo.h @@ -0,0 +1,84 @@ +/** @file
+
+ Copyright (C) 2016, Linaro Ltd. All rights reserved.<BR>
+
+ This program and the accompanying materials are licensed and made available
+ under the terms and conditions of the BSD License which accompanies this
+ distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT
+ WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#ifndef __NON_DISCOVERABLE_PCI_DEVICE_IO_H__
+#define __NON_DISCOVERABLE_PCI_DEVICE_IO_H__
+
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/UefiLib.h>
+
+#include <IndustryStandard/Pci.h>
+
+#include <Protocol/ComponentName.h>
+#include <Protocol/NonDiscoverableDevice.h>
+#include <Protocol/PciIo.h>
+
+#define NON_DISCOVERABLE_PCI_DEVICE_SIG SIGNATURE_32 ('P', 'P', 'I', 'D')
+
+#define NON_DISCOVERABLE_PCI_DEVICE_FROM_PCI_IO(PciIoPointer) \
+ CR (PciIoPointer, NON_DISCOVERABLE_PCI_DEVICE, PciIo, \
+ NON_DISCOVERABLE_PCI_DEVICE_SIG)
+
+#define PCI_ID_VENDOR_UNKNOWN 0xffff
+#define PCI_ID_DEVICE_DONTCARE 0x0000
+
+#define PCI_MAX_BARS 6
+
+typedef struct {
+ UINT32 Signature;
+ //
+ // The bound non-discoverable device protocol instance
+ //
+ NON_DISCOVERABLE_DEVICE *Device;
+ //
+ // The exposed PCI I/O protocol instance.
+ //
+ EFI_PCI_IO_PROTOCOL PciIo;
+ //
+ // The emulated PCI config space of the device. Only the minimally required
+ // items are assigned.
+ //
+ PCI_TYPE00 ConfigSpace;
+ //
+ // The first virtual BAR to assign based on the resources described
+ // by the non-discoverable device.
+ //
+ UINT32 BarOffset;
+ //
+ // The number of virtual BARs we expose based on the number of
+ // resources
+ //
+ UINT32 BarCount;
+ //
+ // The PCI I/O attributes for this device
+ //
+ UINT64 Attributes;
+ //
+ // Whether this device has been enabled
+ //
+ BOOLEAN Enabled;
+} NON_DISCOVERABLE_PCI_DEVICE;
+
+VOID
+InitializePciIoProtocol (
+ NON_DISCOVERABLE_PCI_DEVICE *Device
+ );
+
+extern EFI_COMPONENT_NAME_PROTOCOL gComponentName;
+extern EFI_COMPONENT_NAME2_PROTOCOL gComponentName2;
+
+#endif
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