jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2022, Stephan Unverwerth <s.unverwerth@serenityos.org>
3 * Copyright (c) 2023, Jelle Raaijmakers <jelle@gmta.nl>
4 *
5 * SPDX-License-Identifier: BSD-2-Clause
6 */
7
8#include <AK/HashMap.h>
9#include <AK/WeakPtr.h>
10#include <LibGPU/Driver.h>
11#include <dlfcn.h>
12
13namespace GPU {
14
15// FIXME: Think of a better way to configure these paths. Maybe use ConfigServer?
16// clang-format off
17static HashMap<StringView, char const*> const s_driver_path_map
18{
19#if defined(AK_OS_SERENITY)
20 { "softgpu"sv, "libsoftgpu.so.serenity" },
21 { "virtgpu"sv, "libvirtgpu.so.serenity" },
22#elif defined(AK_OS_MACOS)
23 { "softgpu"sv, "liblagom-softgpu.dylib" },
24#else
25 { "softgpu"sv, "liblagom-softgpu.so.0" },
26#endif
27};
28// clang-format on
29
30static HashMap<DeprecatedString, WeakPtr<Driver>> s_loaded_drivers;
31
32ErrorOr<NonnullRefPtr<Driver>> Driver::try_create(StringView driver_name)
33{
34 // Check if the library for this driver is already loaded
35 auto already_loaded_driver = s_loaded_drivers.find(driver_name);
36 if (already_loaded_driver != s_loaded_drivers.end() && !already_loaded_driver->value.is_null())
37 return *already_loaded_driver->value;
38
39 // Nope, we need to load the library
40 auto it = s_driver_path_map.find(driver_name);
41 if (it == s_driver_path_map.end())
42 return Error::from_string_literal("The requested GPU driver was not found in the list of allowed driver libraries");
43
44 auto lib = dlopen(it->value, RTLD_NOW);
45 if (!lib)
46 return Error::from_string_literal("The library for the requested GPU driver could not be opened");
47
48 auto serenity_gpu_create_device = reinterpret_cast<serenity_gpu_create_device_t>(dlsym(lib, "serenity_gpu_create_device"));
49 if (!serenity_gpu_create_device) {
50 dlclose(lib);
51 return Error::from_string_literal("The library for the requested GPU driver does not contain serenity_gpu_create_device()");
52 }
53
54 auto driver = adopt_ref(*new Driver(lib, serenity_gpu_create_device));
55
56 s_loaded_drivers.set(driver_name, driver->make_weak_ptr());
57
58 return driver;
59}
60
61Driver::~Driver()
62{
63 dlclose(m_dlopen_result);
64}
65
66ErrorOr<NonnullOwnPtr<Device>> Driver::try_create_device(Gfx::IntSize size)
67{
68 auto device_or_null = m_serenity_gpu_create_device(size);
69 if (!device_or_null)
70 return Error::from_string_literal("Could not create GPU device");
71
72 return adopt_own(*device_or_null);
73}
74
75}