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#include "kernel/devices/storage/management.hpp"
#include "kapi/boot_modules.hpp"
#include "kapi/system.hpp"
#include "kapi/devices/device.hpp"
#include "kernel/devices/storage/controller.hpp"
#include "kernel/devices/storage/ram_disk/controller.hpp"
#include <kstd/memory>
#include <kstd/vector>
#include <algorithm>
#include <cstddef>
#include <optional>
namespace kernel::devices::storage
{
namespace
{
constexpr size_t static MINORS_PER_DEVICE = 16;
constexpr size_t static START_MAJOR = 1;
constinit size_t static next_free_major = START_MAJOR;
constinit auto static active_storage_management = std::optional<management>{};
} // namespace
auto management::init() -> void
{
if (active_storage_management)
{
kapi::system::panic("[DEVICES] Storage management has already been initialized.");
}
active_storage_management.emplace(management{});
auto current_ram_disk_controller =
kstd::make_shared<ram_disk::controller>(&kapi::boot_modules::get_boot_module_registry());
active_storage_management->add_controller(current_ram_disk_controller);
std::ranges::for_each(active_storage_management->m_controllers, [](auto controller) { controller->probe(); });
}
auto management::get() -> management &
{
if (!active_storage_management)
{
kapi::system::panic("[DEVICES] Storage management has not been initialized.");
}
return *active_storage_management;
}
auto management::add_controller(kstd::shared_ptr<controller> const & controller) -> void
{
controller->set_ids(next_free_major++, MINORS_PER_DEVICE);
m_controllers.push_back(controller);
}
auto management::all_controllers() const -> kstd::vector<kstd::shared_ptr<controller>> const &
{
return m_controllers;
}
auto management::device_by_major_minor(size_t major, size_t minor) -> kstd::shared_ptr<kapi::devices::device>
{
kstd::shared_ptr<kapi::devices::device> found = nullptr;
std::ranges::find_if(m_controllers, [&](auto const & controller) {
if (controller != nullptr && controller->major() == major)
{
found = controller->device_by_minor(minor);
return found != nullptr;
}
return false;
});
return found;
}
auto management::determine_boot_device() -> kstd::shared_ptr<kapi::devices::device>
{
return device_by_major_minor(START_MAJOR, 0);
}
} // namespace kernel::devices::storage
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