f8a6ec2d57
We want to allow the UEFI firmware to enumerate and assign addresses to PCI devices so we can boot from NVMe[1]. Address assignment of PCI BARs is properly handled by the PCI emulation code in general, but a few specific cases need additional support. fbuf and passthru map additional objects into the guest physical address space and so need to handle address updates. Here we add a callback to emulated PCI devices to inform them of a BAR configuration change. fbuf and passthru then watch for these BAR changes and relocate the frame buffer memory segment and passthru device mmio area respectively. We also add new VM_MUNMAP_MEMSEG and VM_UNMAP_PPTDEV_MMIO ioctls to vmm(4) to facilitate the unmapping needed for addres updates. [1]: https://github.com/freebsd/uefi-edk2/pull/9/ Originally by: scottph MFC After: 1 week Sponsored by: Intel Corporation Reviewed by: grehan Approved by: philip (mentor) Differential Revision: https://reviews.freebsd.org/D24066
60 lines
2.5 KiB
C
60 lines
2.5 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2011 NetApp, Inc.
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* All rights reserved.
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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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*
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* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC 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 _IO_PPT_H_
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#define _IO_PPT_H_
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int ppt_unassign_all(struct vm *vm);
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int ppt_map_mmio(struct vm *vm, int bus, int slot, int func,
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vm_paddr_t gpa, size_t len, vm_paddr_t hpa);
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int ppt_unmap_mmio(struct vm *vm, int bus, int slot, int func,
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vm_paddr_t gpa, size_t len);
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int ppt_setup_msi(struct vm *vm, int vcpu, int bus, int slot, int func,
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uint64_t addr, uint64_t msg, int numvec);
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int ppt_setup_msix(struct vm *vm, int vcpu, int bus, int slot, int func,
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int idx, uint64_t addr, uint64_t msg, uint32_t vector_control);
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int ppt_disable_msix(struct vm *vm, int bus, int slot, int func);
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int ppt_assigned_devices(struct vm *vm);
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bool ppt_is_mmio(struct vm *vm, vm_paddr_t gpa);
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/*
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* Returns the number of devices sequestered by the ppt driver for assignment
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* to virtual machines.
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*/
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int ppt_avail_devices(void);
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/*
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* The following functions should never be called directly.
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* Use 'vm_assign_pptdev()' and 'vm_unassign_pptdev()' instead.
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*/
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int ppt_assign_device(struct vm *vm, int bus, int slot, int func);
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int ppt_unassign_device(struct vm *vm, int bus, int slot, int func);
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#endif
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