9da9560c4d
Use the existing legacy PCI driver as the basis for shared code between the legacy and modern PCI drivers. The existing virtio_pci kernel module will contain both the legacy and modern drivers. Changes to the virtqueue and each device driver (network, block, etc) for V1 support come in later commits. Update the MMIO driver to reflect the VirtIO bus method changes, but the modern compliance can be improved on later. Note that the modern PCI driver requires bus_map_resource() to be implemented, which is not the case on all archs. The hw.virtio.pci.transitional tunable default value is zero so transitional devices will continue to be driven via the legacy driver. Reviewed by: grehan (mentor) Differential Revision: https://reviews.freebsd.org/D27856
56 lines
2.3 KiB
C
56 lines
2.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright IBM Corp. 2007
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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*
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* This header is BSD licensed so anyone can use the definitions to implement
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* compatible drivers/servers.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of IBM nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _VIRTIO_PCI_VAR_H
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#define _VIRTIO_PCI_VAR_H
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/* VirtIO PCI vendor/device ID. */
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#define VIRTIO_PCI_VENDORID 0x1AF4
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#define VIRTIO_PCI_DEVICEID_MIN 0x1000
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#define VIRTIO_PCI_DEVICEID_LEGACY_MAX 0x103F
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#define VIRTIO_PCI_DEVICEID_MODERN_MIN 0x1040
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#define VIRTIO_PCI_DEVICEID_MODERN_MAX 0x107F
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/* The bit of the ISR which indicates a device has an interrupt. */
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#define VIRTIO_PCI_ISR_INTR 0x1
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/* The bit of the ISR which indicates a device configuration change. */
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#define VIRTIO_PCI_ISR_CONFIG 0x2
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/* Vector value used to disable MSI for queue. */
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#define VIRTIO_MSI_NO_VECTOR 0xFFFF
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#endif /* _VIRTIO_PCI_VAR_H */
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