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[src/trunk]: src/sys/dev/nvmm Rename the internal NVMM HVA table entries from...
details: https://anonhg.NetBSD.org/src/rev/b6eef6d64a5b
branches: trunk
changeset: 449450:b6eef6d64a5b
user: maxv <maxv%NetBSD.org@localhost>
date: Thu Mar 07 15:22:21 2019 +0000
description:
Rename the internal NVMM HVA table entries from "segment" to "hmapping",
less confusing. Also fix the error handling in nvmm_hva_unmap().
diffstat:
sys/dev/nvmm/nvmm.c | 154 +++++++++++++++++++++---------------------
sys/dev/nvmm/nvmm_internal.h | 10 +-
2 files changed, 81 insertions(+), 83 deletions(-)
diffs (truncated from 336 to 300 lines):
diff -r 997caff5bc2e -r b6eef6d64a5b sys/dev/nvmm/nvmm.c
--- a/sys/dev/nvmm/nvmm.c Thu Mar 07 15:06:37 2019 +0000
+++ b/sys/dev/nvmm/nvmm.c Thu Mar 07 15:22:21 2019 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: nvmm.c,v 1.8 2019/02/18 12:17:45 maxv Exp $ */
+/* $NetBSD: nvmm.c,v 1.9 2019/03/07 15:22:21 maxv Exp $ */
/*
* Copyright (c) 2018 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: nvmm.c,v 1.8 2019/02/18 12:17:45 maxv Exp $");
+__KERNEL_RCSID(0, "$NetBSD: nvmm.c,v 1.9 2019/03/07 15:22:21 maxv Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@@ -218,10 +218,10 @@
uvmspace_free(mach->vm);
/* Drop the kernel UOBJ refs. */
- for (j = 0; j < NVMM_MAX_SEGS; j++) {
- if (!mach->segs[j].present)
+ for (j = 0; j < NVMM_MAX_HMAPPINGS; j++) {
+ if (!mach->hmap[j].present)
continue;
- uao_detach(mach->segs[j].uobj);
+ uao_detach(mach->hmap[j].uobj);
}
nvmm_machine_free(mach);
@@ -259,8 +259,8 @@
/* Curproc owns the machine. */
mach->procid = curproc->p_pid;
- /* Zero out the segments. */
- memset(&mach->segs, 0, sizeof(mach->segs));
+ /* Zero out the host mappings. */
+ memset(&mach->hmap, 0, sizeof(mach->hmap));
/* Create the machine vmspace. */
mach->gpa_begin = 0;
@@ -303,10 +303,10 @@
uvmspace_free(mach->vm);
/* Drop the kernel UOBJ refs. */
- for (i = 0; i < NVMM_MAX_SEGS; i++) {
- if (!mach->segs[i].present)
+ for (i = 0; i < NVMM_MAX_HMAPPINGS; i++) {
+ if (!mach->hmap[i].present)
continue;
- uao_detach(mach->segs[i].uobj);
+ uao_detach(mach->hmap[i].uobj);
}
nvmm_machine_free(mach);
@@ -522,36 +522,21 @@
/* -------------------------------------------------------------------------- */
static struct uvm_object *
-nvmm_seg_getuobj(struct nvmm_machine *mach, uintptr_t hva, size_t size,
+nvmm_hmapping_getuobj(struct nvmm_machine *mach, uintptr_t hva, size_t size,
size_t *off)
{
- struct nvmm_seg *seg;
+ struct nvmm_hmapping *hmapping;
size_t i;
- for (i = 0; i < NVMM_MAX_SEGS; i++) {
- seg = &mach->segs[i];
- if (!seg->present) {
+ for (i = 0; i < NVMM_MAX_HMAPPINGS; i++) {
+ hmapping = &mach->hmap[i];
+ if (!hmapping->present) {
continue;
}
- if (hva >= seg->hva && hva + size <= seg->hva + seg->size) {
- *off = hva - seg->hva;
- return seg->uobj;
- }
- }
-
- return NULL;
-}
-
-static struct nvmm_seg *
-nvmm_seg_find(struct nvmm_machine *mach, uintptr_t hva, size_t size)
-{
- struct nvmm_seg *seg;
- size_t i;
-
- for (i = 0; i < NVMM_MAX_SEGS; i++) {
- seg = &mach->segs[i];
- if (seg->present && seg->hva == hva && seg->size == size) {
- return seg;
+ if (hva >= hmapping->hva &&
+ hva + size <= hmapping->hva + hmapping->size) {
+ *off = hva - hmapping->hva;
+ return hmapping->uobj;
}
}
@@ -559,9 +544,9 @@
}
static int
-nvmm_seg_validate(struct nvmm_machine *mach, uintptr_t hva, size_t size)
+nvmm_hmapping_validate(struct nvmm_machine *mach, uintptr_t hva, size_t size)
{
- struct nvmm_seg *seg;
+ struct nvmm_hmapping *hmapping;
size_t i;
if ((hva % PAGE_SIZE) != 0 || (size % PAGE_SIZE) != 0) {
@@ -571,24 +556,27 @@
return EINVAL;
}
- for (i = 0; i < NVMM_MAX_SEGS; i++) {
- seg = &mach->segs[i];
- if (!seg->present) {
+ for (i = 0; i < NVMM_MAX_HMAPPINGS; i++) {
+ hmapping = &mach->hmap[i];
+ if (!hmapping->present) {
continue;
}
- if (hva >= seg->hva && hva + size <= seg->hva + seg->size) {
+ if (hva >= hmapping->hva &&
+ hva + size <= hmapping->hva + hmapping->size) {
break;
}
- if (hva >= seg->hva && hva < seg->hva + seg->size) {
+ if (hva >= hmapping->hva &&
+ hva < hmapping->hva + hmapping->size) {
return EEXIST;
}
- if (hva + size > seg->hva &&
- hva + size <= seg->hva + seg->size) {
+ if (hva + size > hmapping->hva &&
+ hva + size <= hmapping->hva + hmapping->size) {
return EEXIST;
}
- if (hva <= seg->hva && hva + size >= seg->hva + seg->size) {
+ if (hva <= hmapping->hva &&
+ hva + size >= hmapping->hva + hmapping->size) {
return EEXIST;
}
}
@@ -596,33 +584,48 @@
return 0;
}
-static struct nvmm_seg *
-nvmm_seg_alloc(struct nvmm_machine *mach)
+static struct nvmm_hmapping *
+nvmm_hmapping_alloc(struct nvmm_machine *mach)
{
- struct nvmm_seg *seg;
+ struct nvmm_hmapping *hmapping;
size_t i;
- for (i = 0; i < NVMM_MAX_SEGS; i++) {
- seg = &mach->segs[i];
- if (!seg->present) {
- seg->present = true;
- return seg;
+ for (i = 0; i < NVMM_MAX_HMAPPINGS; i++) {
+ hmapping = &mach->hmap[i];
+ if (!hmapping->present) {
+ hmapping->present = true;
+ return hmapping;
}
}
return NULL;
}
-static void
-nvmm_seg_free(struct nvmm_seg *seg)
+static int
+nvmm_hmapping_free(struct nvmm_machine *mach, uintptr_t hva, size_t size)
{
struct vmspace *vmspace = curproc->p_vmspace;
+ struct nvmm_hmapping *hmapping;
+ size_t i;
- uvm_unmap(&vmspace->vm_map, seg->hva, seg->hva + seg->size);
- uao_detach(seg->uobj);
+ for (i = 0; i < NVMM_MAX_HMAPPINGS; i++) {
+ hmapping = &mach->hmap[i];
+ if (!hmapping->present || hmapping->hva != hva ||
+ hmapping->size != size) {
+ continue;
+ }
- seg->uobj = NULL;
- seg->present = false;
+ uvm_unmap(&vmspace->vm_map, hmapping->hva,
+ hmapping->hva + hmapping->size);
+ uao_detach(hmapping->uobj);
+
+ hmapping->uobj = NULL;
+ hmapping->present = false;
+
+ return 0;
+ }
+
+ return ENOENT;
}
static int
@@ -630,7 +633,7 @@
{
struct vmspace *vmspace = curproc->p_vmspace;
struct nvmm_machine *mach;
- struct nvmm_seg *seg;
+ struct nvmm_hmapping *hmapping;
vaddr_t uva;
int error;
@@ -638,30 +641,30 @@
if (error)
return error;
- error = nvmm_seg_validate(mach, args->hva, args->size);
+ error = nvmm_hmapping_validate(mach, args->hva, args->size);
if (error)
goto out;
- seg = nvmm_seg_alloc(mach);
- if (seg == NULL) {
+ hmapping = nvmm_hmapping_alloc(mach);
+ if (hmapping == NULL) {
error = ENOBUFS;
goto out;
}
- seg->hva = args->hva;
- seg->size = args->size;
- seg->uobj = uao_create(seg->size, 0);
- uva = seg->hva;
+ hmapping->hva = args->hva;
+ hmapping->size = args->size;
+ hmapping->uobj = uao_create(hmapping->size, 0);
+ uva = hmapping->hva;
/* Take a reference for the user. */
- uao_reference(seg->uobj);
+ uao_reference(hmapping->uobj);
/* Map the uobj into the user address space, as pageable. */
- error = uvm_map(&vmspace->vm_map, &uva, seg->size, seg->uobj, 0, 0,
- UVM_MAPFLAG(UVM_PROT_RW, UVM_PROT_RW, UVM_INH_SHARE,
+ error = uvm_map(&vmspace->vm_map, &uva, hmapping->size, hmapping->uobj,
+ 0, 0, UVM_MAPFLAG(UVM_PROT_RW, UVM_PROT_RW, UVM_INH_SHARE,
UVM_ADV_RANDOM, UVM_FLAG_FIXED|UVM_FLAG_UNMAP));
if (error) {
- uao_detach(seg->uobj);
+ uao_detach(hmapping->uobj);
}
out:
@@ -673,21 +676,16 @@
nvmm_hva_unmap(struct nvmm_ioc_hva_unmap *args)
{
struct nvmm_machine *mach;
- struct nvmm_seg *seg;
int error;
error = nvmm_machine_get(args->machid, &mach, true);
if (error)
return error;
- seg = nvmm_seg_find(mach, args->hva, args->size);
- if (seg == NULL)
- return ENOENT;
-
- nvmm_seg_free(seg);
+ error = nvmm_hmapping_free(mach, args->hva, args->size);
nvmm_machine_put(mach);
- return 0;
+ return error;
}
/* -------------------------------------------------------------------------- */
@@ -728,7 +726,7 @@
}
gpa = args->gpa;
- uobj = nvmm_seg_getuobj(mach, args->hva, args->size, &off);
+ uobj = nvmm_hmapping_getuobj(mach, args->hva, args->size, &off);
if (uobj == NULL) {
error = EINVAL;
goto out;
diff -r 997caff5bc2e -r b6eef6d64a5b sys/dev/nvmm/nvmm_internal.h
--- a/sys/dev/nvmm/nvmm_internal.h Thu Mar 07 15:06:37 2019 +0000
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