List of driver memory regions assigned to a single L4-VIRTIO transport instance. More...

#include <l4virtio>

Inheritance diagram for L4virtio::Svr::Driver_mem_list_t< DATA >:

Collaboration diagram for L4virtio::Svr::Driver_mem_list_t< DATA >:

Public Types
typedef L4Re::Util::Unique_cap< L4Re::Dataspace >	Ds_cap
	type for storing a data-space capability internally

Public Member Functions
	Driver_mem_list_t ()
	Make an empty, zero capacity list.

void	init (unsigned max)
	Make a fresh list with capacity max.

bool	full () const

Mem_region const *	add (l4_uint64_t drv_base, l4_umword_t size, l4_addr_t offset, Ds_cap &&ds)
	Add a new region to the list.

void	remove (Mem_region const *r)
	Remove the given region from the list.

Mem_region *	find (l4_uint64_t base, l4_umword_t size) const
	Find memory region containing the given driver address region.

void	load_desc (Virtqueue::Desc const &desc, Request_processor const p, Virtqueue::Desc const *table) const
	Default implementation for loading an indirect descriptor.

void	load_desc (Virtqueue::Desc const &desc, Request_processor const p, Mem_region const *data) const
	Default implementation returning the Driver_mem_region.

template<typename ARG >
void	load_desc (Virtqueue::Desc const &desc, Request_processor const p, ARG data) const
	Default implementation returning generic information.

Detailed Description

template<typename DATA>
class L4virtio::Svr::Driver_mem_list_t< DATA >

List of driver memory regions assigned to a single L4-VIRTIO transport instance.

Note: The regions added to this list must never overlap.

Definition at line 609 of file l4virtio.

Member Function Documentation

◆ add()

template<typename DATA >

Mem_region const * L4virtio::Svr::Driver_mem_list_t< DATA >::add	(	l4_uint64_t	drv_base,
		l4_umword_t	size,
		l4_addr_t	offset,
		Ds_cap &&	ds
	)

inline

Add a new region to the list.

Parameters

drv_base	Driver base address of the region.
size	Size of the region in bytes.
offset	Offset within the data space attached to drv_base.
ds	Data space backing the driver memory.

Returns: A pointer to the new region.

Definition at line 649 of file l4virtio.

References L4Re::chksys(), L4virtio::Svr::Driver_mem_list_t< DATA >::full(), and L4_ENOMEM.

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◆ find()

template<typename DATA >

Mem_region * L4virtio::Svr::Driver_mem_list_t< DATA >::find	(	l4_uint64_t	base,
		l4_umword_t	size
	)		const

inline

Find memory region containing the given driver address region.

Parameters

base	Driver base address.
size	Size of the region.

Returns: Pointer to the region containing the given region, NULL if none is found.

Definition at line 683 of file l4virtio.

Referenced by L4virtio::Svr::Driver_mem_list_t< DATA >::load_desc(), L4virtio::Svr::Driver_mem_list_t< DATA >::load_desc(), and L4virtio::Svr::Driver_mem_list_t< DATA >::load_desc().

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◆ full()

template<typename DATA >

bool L4virtio::Svr::Driver_mem_list_t< DATA >::full ( ) const

inline

Returns: True if the remaining capacity is 0.

Definition at line 638 of file l4virtio.

Referenced by L4virtio::Svr::Driver_mem_list_t< DATA >::add().

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◆ init()

template<typename DATA >

void L4virtio::Svr::Driver_mem_list_t< DATA >::init ( unsigned max )

inline

Make a fresh list with capacity max.

Parameters

max	The capacity of this vector.

Definition at line 630 of file l4virtio.

◆ load_desc() [1/3]

template<typename DATA >

template<typename ARG >

void L4virtio::Svr::Driver_mem_list_t< DATA >::load_desc	(	Virtqueue::Desc const &	desc,
		Request_processor const *	p,
		ARG *	data
	)		const

inline

Default implementation returning generic information.

Template Parameters

ARG Abstract argument type used with Request_processor::start() and Request_processor::next() to deliver the result of loading a descriptor. This type must provide a constructor taking three arguments: (1) pointer to a Driver_mem_region, (2) the Virtqueue::Desc descriptor, and (3) a pointer to the calling Request_processor.

Parameters

	desc	The descriptor to load
	p	The request processor calling us
[out]	data	Shall be assigned to ARG(mem, desc, p)

Exceptions

Bad_descriptor The descriptor address could not be translated.

Definition at line 744 of file l4virtio.

References L4virtio::Virtqueue::Desc::addr, L4virtio::Svr::Bad_descriptor::Bad_address, L4virtio::Svr::Driver_mem_list_t< DATA >::find(), L4virtio::Ptr< T >::get(), L4_UNLIKELY, and L4virtio::Virtqueue::Desc::len.

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◆ load_desc() [2/3]

template<typename DATA >

void L4virtio::Svr::Driver_mem_list_t< DATA >::load_desc	(	Virtqueue::Desc const &	desc,
		Request_processor const *	p,
		Mem_region const **	data
	)		const

inline

Default implementation returning the Driver_mem_region.

Parameters

	desc	The descriptor to load
	p	The request processor calling us
[out]	data	Shall be set to a pointer to the Driver_mem_region that covers the descriptor.

Exceptions

Bad_descriptor The descriptor address could not be translated.

Definition at line 717 of file l4virtio.

References L4virtio::Virtqueue::Desc::addr, L4virtio::Svr::Bad_descriptor::Bad_address, L4virtio::Svr::Driver_mem_list_t< DATA >::find(), L4virtio::Ptr< T >::get(), L4_UNLIKELY, and L4virtio::Virtqueue::Desc::len.

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◆ load_desc() [3/3]

template<typename DATA >

void L4virtio::Svr::Driver_mem_list_t< DATA >::load_desc	(	Virtqueue::Desc const &	desc,
		Request_processor const *	p,
		Virtqueue::Desc const **	table
	)		const

inline

Default implementation for loading an indirect descriptor.

Parameters

	desc	The descriptor to load
	p	The request processor calling us
[out]	table	Shall be set to the loaded descriptor table

Exceptions

Bad_descriptor The descriptor address could not be translated.

Definition at line 697 of file l4virtio.

References L4virtio::Virtqueue::Desc::addr, L4virtio::Svr::Bad_descriptor::Bad_address, L4virtio::Svr::Driver_mem_list_t< DATA >::find(), L4virtio::Ptr< T >::get(), L4_UNLIKELY, and L4virtio::Virtqueue::Desc::len.

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◆ remove()

template<typename DATA >

void L4virtio::Svr::Driver_mem_list_t< DATA >::remove ( Mem_region const * r )

inline

Remove the given region from the list.

Parameters

r	The region to remove (result from add(), or find()).

Definition at line 663 of file l4virtio.

References L4Re::chksys(), and L4_ERANGE.

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The documentation for this class was generated from the following file:

l4/l4virtio/server/l4virtio

Public Types

Public Member Functions

Detailed Description

Member Function Documentation

◆ add()

◆ find()

◆ full()

◆ init()

◆ load_desc() [1/3]

◆ load_desc() [2/3]

◆ load_desc() [3/3]

◆ remove()