2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2011 NetApp, Inc.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/malloc.h>
37 #include <sys/sglist.h>
39 #include <sys/rwlock.h>
42 #include <vm/vm_param.h>
44 #include <vm/vm_map.h>
45 #include <vm/vm_object.h>
46 #include <vm/vm_page.h>
47 #include <vm/vm_pager.h>
49 #include <machine/md_var.h>
61 vmm_mmio_alloc(struct vmspace *vmspace, vm_paddr_t gpa, size_t len,
68 sg = sglist_alloc(1, M_WAITOK);
69 error = sglist_append_phys(sg, hpa, len);
70 KASSERT(error == 0, ("error %d appending physaddr to sglist", error));
72 obj = vm_pager_allocate(OBJT_SG, sg, len, VM_PROT_RW, 0, NULL);
75 * VT-x ignores the MTRR settings when figuring out the
76 * memory type for translations obtained through EPT.
78 * Therefore we explicitly force the pages provided by
79 * this object to be mapped as uncacheable.
82 error = vm_object_set_memattr(obj, VM_MEMATTR_UNCACHEABLE);
83 VM_OBJECT_WUNLOCK(obj);
84 if (error != KERN_SUCCESS) {
85 panic("vmm_mmio_alloc: vm_object_set_memattr error %d",
88 error = vm_map_find(&vmspace->vm_map, obj, 0, &gpa, len, 0,
89 VMFS_NO_SPACE, VM_PROT_RW, VM_PROT_RW, 0);
90 if (error != KERN_SUCCESS) {
91 vm_object_deallocate(obj);
97 * Drop the reference on the sglist.
99 * If the scatter/gather object was successfully allocated then it
100 * has incremented the reference count on the sglist. Dropping the
101 * initial reference count ensures that the sglist will be freed
102 * when the object is deallocated.
104 * If the object could not be allocated then we end up freeing the
113 vmm_mmio_free(struct vmspace *vmspace, vm_paddr_t gpa, size_t len)
116 vm_map_remove(&vmspace->vm_map, gpa, gpa + len);
120 vmm_mem_maxaddr(void)
123 return (ptoa(Maxmem));