/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2011 NetApp, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/sglist.h>
#include <sys/lock.h>
#include <sys/rwlock.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/pmap.h>
#include <vm/vm_map.h>
#include <vm/vm_object.h>
#include <vm/vm_page.h>
#include <vm/vm_pager.h>
#include <machine/md_var.h>
#include "vmm_mem.h"
int
vmm_mem_init(void)
{
return (0);
}
vm_object_t
vmm_mmio_alloc(struct vmspace *vmspace, vm_paddr_t gpa, size_t len,
vm_paddr_t hpa)
{
int error;
vm_object_t obj;
struct sglist *sg;
sg = sglist_alloc(1, M_WAITOK);
error = sglist_append_phys(sg, hpa, len);
KASSERT(error == 0, ("error %d appending physaddr to sglist", error));
obj = vm_pager_allocate(OBJT_SG, sg, len, VM_PROT_RW, 0, NULL);
if (obj != NULL) {
/*
* VT-x ignores the MTRR settings when figuring out the
* memory type for translations obtained through EPT.
*
* Therefore we explicitly force the pages provided by
* this object to be mapped as uncacheable.
*/
VM_OBJECT_WLOCK(obj);
error = vm_object_set_memattr(obj, VM_MEMATTR_UNCACHEABLE);
VM_OBJECT_WUNLOCK(obj);
if (error != KERN_SUCCESS) {
panic("vmm_mmio_alloc: vm_object_set_memattr error %d",
error);
}
error = vm_map_find(&vmspace->vm_map, obj, 0, &gpa, len, 0,
VMFS_NO_SPACE, VM_PROT_RW, VM_PROT_RW, 0);
if (error != KERN_SUCCESS) {
vm_object_deallocate(obj);
obj = NULL;
}
}
/*
* Drop the reference on the sglist.
*
* If the scatter/gather object was successfully allocated then it
* has incremented the reference count on the sglist. Dropping the
* initial reference count ensures that the sglist will be freed
* when the object is deallocated.
*
* If the object could not be allocated then we end up freeing the
* sglist.
*/
sglist_free(sg);
return (obj);
}
void
vmm_mmio_free(struct vmspace *vmspace, vm_paddr_t gpa, size_t len)
{
vm_map_remove(&vmspace->vm_map, gpa, gpa + len);
}
vm_paddr_t
vmm_mem_maxaddr(void)
{
return (ptoa(Maxmem));
}
plain