1 // Copyright (C) 2023 The Android Open Source Project
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 #include "host/magma/DrmContext.h"
16
17 #include <i915_drm.h>
18 #include <sys/mman.h>
19
20 #include <cerrno>
21 #include <cinttypes>
22
23 #include "host-common/logging.h"
24 #include "host/magma/Connection.h"
25 #include "host/magma/DrmDevice.h"
26
27 namespace gfxstream {
28 namespace magma {
29
DrmContext(Connection & connection)30 DrmContext::DrmContext(Connection& connection) : mConnection(connection) {}
31
DrmContext(DrmContext && other)32 DrmContext::DrmContext(DrmContext&& other) noexcept
33 : mConnection(other.mConnection), mId(other.mId) {
34 other.mId = std::nullopt;
35 }
36
~DrmContext()37 DrmContext::~DrmContext() {
38 if (!mId) {
39 return;
40 }
41 drm_i915_gem_context_destroy params{.ctx_id = mId.value()};
42 int result = mConnection.mDevice.ioctl(DRM_IOCTL_I915_GEM_CONTEXT_DESTROY, ¶ms);
43 if (result) {
44 ERR("DRM_IOCTL_I915_GEM_CONTEXT_DESTROY(%d) failed: %d", mId.value(), errno);
45 }
46 }
47
create(Connection & connection)48 std::unique_ptr<DrmContext> DrmContext::create(Connection& connection) {
49 // Create a new GEM context.
50 drm_i915_gem_context_create_ext params{};
51 int result = connection.mDevice.ioctl(DRM_IOCTL_I915_GEM_CONTEXT_CREATE_EXT, ¶ms);
52 if (result) {
53 ERR("DRM_IOCTL_I915_GEM_CONTEXT_CREATE_EXT failed: %d", errno);
54 return nullptr;
55 }
56
57 auto context = std::unique_ptr<DrmContext>(new DrmContext(connection));
58 context->mId = params.ctx_id;
59
60 INFO("Created DrmContext id %" PRIu32, context->mId);
61 return context;
62 }
63
getId()64 uint32_t DrmContext::getId() { return mId.value(); }
65
66 } // namespace magma
67 } // namespace gfxstream
68