class Bus

Defined at line 17 of file ../../src/devices/block/drivers/ahci/bus.h

Public Methods

void ~Bus ()

Defined at line 19 of file ../../src/devices/block/drivers/ahci/bus.h

void Bus (const Bus & )

Defined at line 21 of file ../../src/devices/block/drivers/ahci/bus.h

zx_status_t Configure ()

Configure the bus for use. Registers should be accessible after this call.

zx_status_t DmaBufferInit (std::unique_ptr<dma_buffer::ContiguousBuffer> * buffer_out, size_t size, zx_paddr_t * phys_out, void ** virt_out)

Initialize dma buffer, returning the mapped physical and virtual addresses

in |phys_out| and |virt_out|.

zx_status_t BtiPin (uint32_t options, const zx::unowned_vmo & vmo, uint64_t offset, uint64_t size, zx_paddr_t * addrs, size_t addrs_count, zx::pmt * pmt_out)

Pin a set of pages for bus transaction initiators (if supported).

Parameters the same as zx_bti_pin();

zx_status_t RegRead (size_t offset, uint32_t * val_out)

Read or write a 32-bit register.

If the bus encounters an error, non-error status will be returned.

A bus error typically means the device is no longer accessible. This may be due to hot-

unplug and should be handled gracefully.

zx_status_t RegWrite (size_t offset, uint32_t val)

zx_status_t InterruptWait ()

Wait on an interrupt from the bus's interrupt source.

void InterruptCancel ()

Cancel a pending interrupt wait.

zx_status_t WaitForClear (size_t offset, uint32_t mask, zx::duration timeout)

Wait until all bits in |mask| are cleared in |reg| or timeout expires.

Defined at line 12 of file ../../src/devices/block/drivers/ahci/bus.cc

Bus & operator= (const Bus & )

Defined at line 21 of file ../../src/devices/block/drivers/ahci/bus.h

zx_status_t WaitForSet (size_t offset, uint32_t mask, zx::duration timeout)

Wait until one bit in |mask| is set in |reg| or timeout expires.

Defined at line 27 of file ../../src/devices/block/drivers/ahci/bus.cc

Protected Methods

void Bus ()

Defined at line 57 of file ../../src/devices/block/drivers/ahci/bus.h