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Kernel/USB: Move buffer allocation from USB transfer to USB pipe
Currently when allocating buffers for USB transfers, it is done once for every transfer rather than once upon creation of the USB device. This commit changes that by moving allocation of buffers to the USB Pipe class where they can be reused.
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parent
5f726ace53
commit
143339767b
4 changed files with 37 additions and 27 deletions
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@ -19,7 +19,7 @@ namespace Kernel::USB {
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class Transfer : public RefCounted<Transfer> {
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public:
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static ErrorOr<NonnullRefPtr<Transfer>> try_create(Pipe&, u16 length);
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static ErrorOr<NonnullRefPtr<Transfer>> try_create(Pipe&, u16 length, Memory::Region& dma_buffer);
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Transfer() = delete;
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~Transfer();
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@ -34,20 +34,20 @@ public:
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USBRequestData const& request() const { return m_request; }
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Pipe const& pipe() const { return m_pipe; }
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Pipe& pipe() { return m_pipe; }
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VirtualAddress buffer() const { return m_data_buffer->vaddr(); }
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PhysicalAddress buffer_physical() const { return m_data_buffer->physical_page(0)->paddr(); }
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VirtualAddress buffer() const { return m_dma_buffer.vaddr(); }
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PhysicalAddress buffer_physical() const { return m_dma_buffer.physical_page(0)->paddr(); }
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u16 transfer_data_size() const { return m_transfer_data_size; }
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bool complete() const { return m_complete; }
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bool error_occurred() const { return m_error_occurred; }
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private:
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Transfer(Pipe& pipe, u16 len, NonnullOwnPtr<Memory::Region>);
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Pipe& m_pipe; // Pipe that initiated this transfer
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USBRequestData m_request; // USB request
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NonnullOwnPtr<Memory::Region> m_data_buffer; // DMA Data buffer for transaction
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u16 m_transfer_data_size { 0 }; // Size of the transfer's data stage
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bool m_complete { false }; // Has this transfer been completed?
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bool m_error_occurred { false }; // Did an error occur during this transfer?
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Transfer(Pipe& pipe, u16 len, Memory::Region& dma_buffer);
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Pipe& m_pipe; // Pipe that initiated this transfer
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Memory::Region& m_dma_buffer; // DMA buffer
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USBRequestData m_request; // USB request
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u16 m_transfer_data_size { 0 }; // Size of the transfer's data stage
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bool m_complete { false }; // Has this transfer been completed?
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bool m_error_occurred { false }; // Did an error occur during this transfer?
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};
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}
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