1 // Copyright 2018 The Fuchsia Authors
2 //
3 // Use of this source code is governed by a MIT-style
4 // license that can be found in the LICENSE file or at
5 // https://opensource.org/licenses/MIT
6
7 #include "priv.h"
8
9 #include <fbl/ref_ptr.h>
10 #include <ktl/move.h>
11 #include <object/pager_dispatcher.h>
12 #include <object/vm_object_dispatcher.h>
13 #include <vm/vm_object_paged.h>
14
15 // zx_status_t zx_pager_create
sys_pager_create(uint32_t options,user_out_handle * out)16 zx_status_t sys_pager_create(uint32_t options, user_out_handle* out) {
17 if (options) {
18 return ZX_ERR_INVALID_ARGS;
19 }
20
21 fbl::RefPtr<Dispatcher> dispatcher;
22 zx_rights_t rights;
23 zx_status_t result = PagerDispatcher::Create(&dispatcher, &rights);
24 if (result != ZX_OK) {
25 return result;
26 }
27
28 return out->make(ktl::move(dispatcher), rights);
29 }
30
31 // zx_status_t zx_pager_create_vmo
sys_pager_create_vmo(zx_handle_t pager,zx_handle_t port,uint64_t key,uint64_t size,uint32_t options,user_out_handle * out)32 zx_status_t sys_pager_create_vmo(zx_handle_t pager, zx_handle_t port, uint64_t key,
33 uint64_t size, uint32_t options, user_out_handle* out) {
34 if (options) {
35 return ZX_ERR_INVALID_ARGS;
36 }
37
38 auto up = ProcessDispatcher::GetCurrent();
39 fbl::RefPtr<PagerDispatcher> pager_dispatcher;
40 zx_status_t status = up->GetDispatcher(pager, &pager_dispatcher);
41 if (status != ZX_OK) {
42 return status;
43 }
44
45 fbl::RefPtr<PortDispatcher> port_dispatcher;
46 status = up->GetDispatcherWithRights(port, ZX_RIGHT_WRITE, &port_dispatcher);
47 if (status != ZX_OK) {
48 return status;
49 }
50
51 fbl::RefPtr<PageSource> src;
52 status = pager_dispatcher->CreateSource(ktl::move(port_dispatcher), key, &src);
53 if (status != ZX_OK) {
54 return status;
55 }
56
57 fbl::RefPtr<VmObject> vmo;
58 status = VmObjectPaged::CreateExternal(ktl::move(src), size, &vmo);
59 if (status != ZX_OK) {
60 return status;
61 }
62
63 fbl::RefPtr<Dispatcher> dispatcher;
64 zx_rights_t rights;
65 status = VmObjectDispatcher::Create(vmo, &dispatcher, &rights);
66 if (status != ZX_OK) {
67 return status;
68 }
69
70 return out->make(ktl::move(dispatcher), rights);
71 }
72