7339bfeffa
Add a 'Ready' boolean to the driver state struct, use it to track whenever the device is ready to be used. In case it is not ready throw an EFI_DEVICE_ERROR instead of sending a request which will never receive an answer. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
43 lines
1.4 KiB
C
43 lines
1.4 KiB
C
/** @file
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Private definitions of the VirtioRng RNG driver
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Copyright (C) 2016, Linaro Ltd.
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#ifndef _VIRTIO_RNG_DXE_H_
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#define _VIRTIO_RNG_DXE_H_
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#include <Protocol/ComponentName.h>
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#include <Protocol/DriverBinding.h>
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#include <Protocol/Rng.h>
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#include <IndustryStandard/Virtio.h>
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#define VIRTIO_RNG_SIG SIGNATURE_32 ('V', 'R', 'N', 'G')
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typedef struct {
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//
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// Parts of this structure are initialized / torn down in various functions
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// at various call depths. The table to the right should make it easier to
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// track them.
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//
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// field init function init depth
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// ---------------- ------------------ ----------
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UINT32 Signature; // DriverBindingStart 0
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VIRTIO_DEVICE_PROTOCOL *VirtIo; // DriverBindingStart 0
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EFI_EVENT ExitBoot; // DriverBindingStart 0
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VRING Ring; // VirtioRingInit 2
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EFI_RNG_PROTOCOL Rng; // VirtioRngInit 1
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VOID *RingMap; // VirtioRingMap 2
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BOOLEAN Ready;
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} VIRTIO_RNG_DEV;
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#define VIRTIO_ENTROPY_SOURCE_FROM_RNG(RngPointer) \
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CR (RngPointer, VIRTIO_RNG_DEV, Rng, VIRTIO_RNG_SIG)
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#endif
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