diff options
Diffstat (limited to 'Kernel/VirtIO/VirtIOQueue.h')
| -rw-r--r-- | Kernel/VirtIO/VirtIOQueue.h | 24 |
1 files changed, 15 insertions, 9 deletions
diff --git a/Kernel/VirtIO/VirtIOQueue.h b/Kernel/VirtIO/VirtIOQueue.h index 1959925507..48be3ffc07 100644 --- a/Kernel/VirtIO/VirtIOQueue.h +++ b/Kernel/VirtIO/VirtIOQueue.h @@ -1,5 +1,5 @@ /* - * Copyright (c) 2020, the SerenityOS developers. + * Copyright (c) 2021, the SerenityOS developers. * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -29,9 +29,13 @@ #include <AK/Badge.h> #include <Kernel/SpinLock.h> #include <Kernel/VM/MemoryManager.h> +#include <Kernel/VM/ScatterGatherList.h> namespace Kernel { +#define VIRTQ_DESC_F_NEXT 1 +#define VIRTQ_DESC_F_INDIRECT 4 + enum class BufferType { DeviceReadable = 0, DeviceWritable = 2 @@ -44,7 +48,7 @@ public: VirtIOQueue(u16 queue_size, u16 notify_offset); ~VirtIOQueue(); - bool is_null() const { return !m_region; } + bool is_null() const { return !m_queue_region; } u16 notify_offset() const { return m_notify_offset; } void enable_interrupts(); @@ -54,17 +58,18 @@ public: PhysicalAddress driver_area() const { return to_physical(m_driver.ptr()); } PhysicalAddress device_area() const { return to_physical(m_device.ptr()); } - bool supply_buffer(Badge<VirtIODevice>, const u8* buffer, u32 length, BufferType); + bool supply_buffer(Badge<VirtIODevice>, const ScatterGatherList&, BufferType, void* token); bool new_data_available() const; - - bool handle_interrupt(); - Function<void()> on_data_available; + void* get_buffer(size_t*); + void discard_used_buffers(); private: + void pop_buffer(u16 descriptor_index); + PhysicalAddress to_physical(const void* ptr) const { - auto offset = FlatPtr(ptr) - m_region->vaddr().get(); - return m_region->physical_page(0)->paddr().offset(offset); + auto offset = FlatPtr(ptr) - m_queue_region->vaddr().get(); + return m_queue_region->physical_page(0)->paddr().offset(offset); } struct [[gnu::packed]] VirtIOQueueDescriptor { u64 address; @@ -100,7 +105,8 @@ private: OwnPtr<VirtIOQueueDescriptor> m_descriptors { nullptr }; OwnPtr<VirtIOQueueDriver> m_driver { nullptr }; OwnPtr<VirtIOQueueDevice> m_device { nullptr }; - OwnPtr<Region> m_region; + Vector<void*> m_tokens; + OwnPtr<Region> m_queue_region; SpinLock<u8> m_lock; }; |