123 lines
3.4 KiB
C
123 lines
3.4 KiB
C
/*-
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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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/sglist.h>
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#include <sys/lock.h>
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#include <sys/rwlock.h>
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#include <vm/vm.h>
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#include <vm/vm_param.h>
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#include <vm/pmap.h>
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#include <vm/vm_map.h>
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#include <vm/vm_object.h>
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#include <vm/vm_page.h>
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#include <vm/vm_pager.h>
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#include <machine/md_var.h>
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#include "vmm_mem.h"
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int
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vmm_mem_init(void)
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{
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return (0);
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}
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vm_object_t
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vmm_mmio_alloc(struct vmspace *vmspace, vm_paddr_t gpa, size_t len,
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vm_paddr_t hpa)
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{
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int error;
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vm_object_t obj;
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struct sglist *sg;
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sg = sglist_alloc(1, M_WAITOK);
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error = sglist_append_phys(sg, hpa, len);
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KASSERT(error == 0, ("error %d appending physaddr to sglist", error));
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obj = vm_pager_allocate(OBJT_SG, sg, len, VM_PROT_RW, 0, NULL);
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if (obj != NULL) {
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/*
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* VT-x ignores the MTRR settings when figuring out the
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* memory type for translations obtained through EPT.
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*
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* Therefore we explicitly force the pages provided by
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* this object to be mapped as uncacheable.
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*/
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VM_OBJECT_WLOCK(obj);
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error = vm_object_set_memattr(obj, VM_MEMATTR_UNCACHEABLE);
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VM_OBJECT_WUNLOCK(obj);
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if (error != KERN_SUCCESS) {
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panic("vmm_mmio_alloc: vm_object_set_memattr error %d",
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error);
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}
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error = vm_map_find(&vmspace->vm_map, obj, 0, &gpa, len, 0,
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VMFS_NO_SPACE, VM_PROT_RW, VM_PROT_RW, 0);
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if (error != KERN_SUCCESS) {
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vm_object_deallocate(obj);
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obj = NULL;
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}
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}
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/*
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* Drop the reference on the sglist.
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*
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* If the scatter/gather object was successfully allocated then it
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* has incremented the reference count on the sglist. Dropping the
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* initial reference count ensures that the sglist will be freed
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* when the object is deallocated.
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*
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* If the object could not be allocated then we end up freeing the
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* sglist.
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*/
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sglist_free(sg);
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return (obj);
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}
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void
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vmm_mmio_free(struct vmspace *vmspace, vm_paddr_t gpa, size_t len)
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{
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vm_map_remove(&vmspace->vm_map, gpa, gpa + len);
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}
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vm_paddr_t
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vmm_mem_maxaddr(void)
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{
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return (ptoa(Maxmem));
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}
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