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pci: provide dma-able memory via pci_drv
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c36f6a04a7
commit
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@ -104,25 +104,26 @@ namespace Block {
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}
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};
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Driver_factory &_driver_factory;
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Driver &_driver;
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Dataspace_capability _rq_ds;
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Rq_thread _rq_thread;
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Driver_factory &_driver_factory;
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Driver &_driver;
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Ram_dataspace_capability _rq_ds;
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Rq_thread _rq_thread;
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public:
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/**
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* Constructor
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*/
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Session_component(Dataspace_capability rq_ds,
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Driver_factory &driver_factory,
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Rpc_entrypoint &ep)
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Session_component(Ram_dataspace_capability rq_ds,
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Driver &driver,
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Driver_factory &driver_factory,
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Rpc_entrypoint &ep)
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:
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Session_rpc_object(rq_ds, ep),
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_driver_factory(driver_factory),
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_driver(*_driver_factory.create()),
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_driver(driver),
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_rq_ds(rq_ds),
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_rq_thread(tx_sink(), _driver, Dataspace_client(rq_ds).phys_addr())
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_rq_thread(tx_sink(), _driver, Dataspace_client(_rq_ds).phys_addr())
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{ }
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/**
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@ -188,9 +189,11 @@ namespace Block {
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throw Root::Quota_exceeded();
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}
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Driver * driver = _driver_factory.create();
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Ram_dataspace_capability ds_cap;
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ds_cap = driver->alloc_dma_buffer(tx_buf_size);
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return new (md_alloc())
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Session_component(env()->ram_session()->alloc(tx_buf_size, false),
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_driver_factory, _ep);
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Session_component(ds_cap, *driver, _driver_factory, _ep);
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}
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public:
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@ -18,6 +18,8 @@
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#include <base/exception.h>
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#include <base/stdint.h>
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#include <ram_session/ram_session.h>
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namespace Block {
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@ -91,6 +93,11 @@ namespace Block {
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* \return true if DMA is enabled, false otherwise
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*/
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virtual bool dma_enabled() = 0;
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/**
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* Allocate buffer which is suitable for DMA.
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*/
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virtual Genode::Ram_dataspace_capability alloc_dma_buffer(Genode::size_t) = 0;
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};
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@ -35,6 +35,10 @@ namespace Pci {
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Genode::Io_mem_dataspace_capability config_extended(Device_capability device_cap) {
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return call<Rpc_config_extended>(device_cap); }
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Genode::Ram_dataspace_capability alloc_dma_buffer(Device_capability device_cap,
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Genode::size_t size) {
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return call<Rpc_alloc_dma_buffer>(device_cap, size); }
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};
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}
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@ -16,6 +16,7 @@
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#include <pci_device/pci_device.h>
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#include <session/session.h>
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#include <ram_session/ram_session.h>
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namespace Pci {
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@ -55,6 +56,11 @@ namespace Pci {
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*/
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virtual Genode::Io_mem_dataspace_capability config_extended(Device_capability) = 0;
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/**
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* Allocate memory suitable for DMA.
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*/
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virtual Genode::Ram_dataspace_capability alloc_dma_buffer(Device_capability,
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Genode::size_t) = 0;
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/*********************
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** RPC declaration **
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*********************/
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@ -65,9 +71,14 @@ namespace Pci {
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GENODE_RPC(Rpc_release_device, void, release_device, Device_capability);
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GENODE_RPC(Rpc_config_extended, Genode::Io_mem_dataspace_capability,
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config_extended, Device_capability);
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GENODE_RPC_THROW(Rpc_alloc_dma_buffer, Genode::Ram_dataspace_capability,
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alloc_dma_buffer,
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GENODE_TYPE_LIST(Genode::Ram_session::Quota_exceeded),
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Device_capability, Genode::size_t);
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GENODE_RPC_INTERFACE(Rpc_first_device, Rpc_next_device,
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Rpc_release_device, Rpc_config_extended);
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Rpc_release_device, Rpc_config_extended,
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Rpc_alloc_dma_buffer);
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};
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}
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@ -770,6 +770,9 @@ class Ahci_driver : public Block::Driver
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PERR("%s should not be called", __PRETTY_FUNCTION__);
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throw Io_error();
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}
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Ram_dataspace_capability alloc_dma_buffer(size_t size) {
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return env()->ram_session()->alloc(size); }
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};
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@ -291,6 +291,10 @@ namespace Pci {
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return io_mem->dataspace();
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}
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Genode::Ram_dataspace_capability alloc_dma_buffer(Device_capability device_cap,
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Genode::size_t size) {
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return Genode::env()->ram_session()->alloc(size, false); }
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};
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@ -119,6 +119,10 @@ class Block::Omap4_driver : public Block::Driver
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}
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bool dma_enabled() { return _use_dma; }
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Ram_dataspace_capability alloc_dma_buffer(size_t size) {
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/* unused */
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return Ram_dataspace_capability(); }
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};
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#endif /* _DRIVER_H_ */
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@ -130,6 +130,11 @@ class Sd_card : public Block::Driver
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throw Io_error(); }
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bool dma_enabled() { return false; }
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Genode::Ram_dataspace_capability alloc_dma_buffer(Genode::size_t size)
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{
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return Genode::env()->ram_session()->alloc(size, false);
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}
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};
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#endif /* _SD_CARD_H_ */
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