Detailed Description

Interface for PCI communications.

Summary

The PCI interface provides common APIs for PCI HAL drivers. The PCI interface supports the following features:

PCI communication
Issuing various requests supported by PCI
Callback function with returned event code

Data Structures
struct	pci_configuration_register_init_t

struct	pci_configuration_register_transfer_t

struct	pci_io_register_transfer_t

struct	pci_message_transfer_t

struct	pci_status_t

struct	pci_callback_args_t

struct	pci_cfg_t

struct	pci_api_t

struct	pci_instance_t

Typedefs
typedef void	pci_ctrl_t

Enumerations
enum	pci_event_t

enum	pci_configuration_write_type_t

enum	pci_configuration_read_type_t

enum	pci_link_speed_t

enum	pci_ltssm_state_t

Data Structure Documentation

◆ pci_configuration_register_init_t

struct pci_configuration_register_init_t

Structure to define a PCI configuration register.

Data Fields
uint32_t	register_number	Configuration register number to be initialized.
uint32_t	init_value	Configuration register initial value to be initialized.
uint32_t	init_value_mask	Configuration register initial value mask to be initialized.

◆ pci_configuration_register_transfer_t

struct pci_configuration_register_transfer_t

Structure to define a CfgRd/CfgWr request transfer.

◆ pci_io_register_transfer_t

struct pci_io_register_transfer_t

Structure to define a IORd/IOWr request transfer.

Data Fields
uint32_t	address	I/O address.

◆ pci_message_transfer_t

struct pci_message_transfer_t

Structure to define a PCI Express Msg/MsgD request transfer.

Data Fields
union pci_message_transfer_t	__unnamed__
union pci_message_transfer_t	__unnamed__
uint32_t	header_3rd	Message 3rd header.
uint32_t	header_4th	Message 4th header.
uint32_t	data	Message data for MsgD request.

◆ pci_status_t

struct pci_status_t

PCI Express status

Data Fields
bool	is_link_up	Current link up state.
pci_ltssm_state_t	ltssm_state	Current LTSSM state.

◆ pci_callback_args_t

struct pci_callback_args_t

Common callback parameter definition

Data Fields
pci_event_t	event	Event code.
uint32_t	data1	Data when event interrupt occurred.
uint32_t	data2	Data when event interrupt occurred.
uint32_t	data3	Data when event interrupt occurred.
void const *	p_context	Context provided to user during callback.

◆ pci_cfg_t

struct pci_cfg_t

User configuration structure, used in open function

Data Fields
uint8_t	channel
	Channel number to be used.

uint8_t	function
	PCI function number to be used.

void const *	p_configuration_register_header
	PCI configuration register.

pci_configuration_register_init_t const *	p_configuration_register_init_list

uint32_t	configuration_register_init_list_length
	Length of configuration register list initialized in pci_api_t::open.

IRQn_Type	inta_irq
	INTA interrupt number.

uint8_t	inta_ipl
	INTA interrupt priority.

IRQn_Type	intb_irq
	INTB interrupt number.

uint8_t	intb_ipl
	INTB interrupt priority.

IRQn_Type	intc_irq
	INTC interrupt number.

uint8_t	intc_ipl
	INTC interrupt priority.

IRQn_Type	intd_irq
	INTD interrupt number.

uint8_t	intd_ipl
	INTD interrupt priority.

IRQn_Type	msi_irq
	MSI interrupt number.

uint8_t	msi_ipl
	MSI interrupt priority.

void const *	p_context
	User defined context passed to callback function.

void const *	p_extend
	Extended PCI hardware dependent configuration.

void(*	p_callback )(pci_callback_args_t *p_args)

Field Documentation

◆ p_configuration_register_init_list

pci_configuration_register_init_t const* pci_cfg_t::p_configuration_register_init_list

List of configuration registers initialized in pci_api_t::open.

◆ p_callback

void(* pci_cfg_t::p_callback) (pci_callback_args_t *p_args)

Callback provided when a PCI ISR occurs. Set to NULL for no CPU interrupt.

◆ pci_api_t

struct pci_api_t

PCI driver structure. General PCI functions implemented at the HAL layer will follow this API.

Data Fields
fsp_err_t(*	open )(pci_ctrl_t const p_ctrl, pci_cfg_t const const p_cfg)

fsp_err_t(*	selfConfigurationRegisterGet )(pci_ctrl_t const p_ctrl, uint32_t register_number, uint32_t p_data)

fsp_err_t(*	selfConfigurationRegisterSet )(pci_ctrl_t *const p_ctrl, uint32_t register_number, uint32_t data)

fsp_err_t(*	configurationRegisterWrite )(pci_ctrl_t const p_ctrl, pci_configuration_write_type_t transaction_type, pci_configuration_register_transfer_t const p_transfer)

fsp_err_t(*	configurationRegisterRead )(pci_ctrl_t const p_ctrl, pci_configuration_read_type_t transaction_type, pci_configuration_register_transfer_t const p_transfer)

fsp_err_t(*	iORegisterWrite )(pci_ctrl_t const p_ctrl, pci_io_register_transfer_t const p_transfer)

fsp_err_t(*	iORegisterRead )(pci_ctrl_t const p_ctrl, pci_io_register_transfer_t const p_transfer)

fsp_err_t(*	messageWrite )(pci_ctrl_t const p_ctrl, pci_message_transfer_t const p_transfer, bool with_data)

fsp_err_t(*	messageRead )(pci_ctrl_t const p_ctrl, pci_message_transfer_t const p_transfer)

fsp_err_t(*	intxAssert )(pci_ctrl_t *const p_ctrl)

fsp_err_t(*	intxDeassert )(pci_ctrl_t *const p_ctrl)

fsp_err_t(*	linkStatusGet )(pci_ctrl_t const p_ctrl, pci_status_t const p_status)

fsp_err_t(*	linkWidthChange )(pci_ctrl_t *const p_ctrl, uint32_t link_width, uint32_t option)

fsp_err_t(*	linkSpeedChange )(pci_ctrl_t *const p_ctrl, pci_link_speed_t link_speed, uint32_t option)

fsp_err_t(*	linkEqualizationRequest )(pci_ctrl_t *const p_ctrl)

fsp_err_t(*	callbackSet )(pci_ctrl_t const p_ctrl, void(p_callback)(pci_callback_args_t ), void const const p_context, pci_callback_args_t *const p_callback_memory)

fsp_err_t(*	close )(pci_ctrl_t *const p_ctrl)

Field Documentation

◆ open

fsp_err_t(* pci_api_t::open) (pci_ctrl_t *const p_ctrl, pci_cfg_t const *const p_cfg)

Open function for PCI device.

Parameters

[in,out]	p_ctrl	Pointer to the PCI control block. Must be declared by user. Value set here.
[in]	p_cfg	Pointer to PCI configuration structure. All elements of this structure must be set by user.

◆ selfConfigurationRegisterGet

fsp_err_t(* pci_api_t::selfConfigurationRegisterGet) (pci_ctrl_t *const p_ctrl, uint32_t register_number, uint32_t *p_data)

Get the self PCI configuration register value.

Parameters

[in,out]	p_ctrl	Pointer to the PCI control block.
[in]	register_number	Register number of the configuration register.
[out]	p_data	Memory address to return data.

◆ selfConfigurationRegisterSet

fsp_err_t(* pci_api_t::selfConfigurationRegisterSet) (pci_ctrl_t *const p_ctrl, uint32_t register_number, uint32_t data)

Set the self PCI configuration register value.

Parameters

[in,out]	p_ctrl	Pointer to the PCI control block.
[in]	register_number	Register number of the configuration register.
[in]	data	Value to set.

◆ configurationRegisterWrite

fsp_err_t(* pci_api_t::configurationRegisterWrite) (pci_ctrl_t *const p_ctrl, pci_configuration_write_type_t transaction_type, pci_configuration_register_transfer_t *const p_transfer)

Issue Configuration Write Type 0/1 Request (CfgWr 0/1).

Parameters

[in]	p_ctrl	Pointer to the PCI control block.
[in]	transaction_type	Whether issue CfgWr0 or CfgWr1
[in]	p_transfer	Pointer for data to send.

◆ configurationRegisterRead

fsp_err_t(* pci_api_t::configurationRegisterRead) (pci_ctrl_t *const p_ctrl, pci_configuration_read_type_t transaction_type, pci_configuration_register_transfer_t *const p_transfer)

Issue Configuration Read Type 0/1 Request (CfgRd 0/1).

Parameters

[in]	p_ctrl	Pointer to the PCI control block.
[in]	transaction_type	Whether issue CfgRd0 or CfgRd1
[in]	p_transfer	Pointer for store receive data.

◆ iORegisterWrite

fsp_err_t(* pci_api_t::iORegisterWrite) (pci_ctrl_t *const p_ctrl, pci_io_register_transfer_t *const p_transfer)

Issue I/O Write Request (IOWr).

Parameters

[in]	p_ctrl	Pointer to the PCI control block.
[in]	p_transfer	Pointer for data to send.

◆ iORegisterRead

fsp_err_t(* pci_api_t::iORegisterRead) (pci_ctrl_t *const p_ctrl, pci_io_register_transfer_t *const p_transfer)

Issue I/O Read Request (IORd).

Parameters

[in]	p_ctrl	Pointer to the PCI control block.
[in]	p_transfer	Pointer for store receive I/O data.

◆ messageWrite

fsp_err_t(* pci_api_t::messageWrite) (pci_ctrl_t *const p_ctrl, pci_message_transfer_t *const p_transfer, bool with_data)

PCI Express issue Message Request (Msg) / Message Request with data payload (MsgD).

Parameters

[in]	p_ctrl	Pointer to the PCI control block.
[in]	p_transfer	Pointer for message data to send.
[in]	with_data	Weather issue Meg or MsgD request.

◆ messageRead

fsp_err_t(* pci_api_t::messageRead) (pci_ctrl_t *const p_ctrl, pci_message_transfer_t *const p_transfer)

PCI Express read Message Request.

Parameters

[in]	p_ctrl	Pointer to the PCI control block.
[in]	p_transfer	Pointer for store receive message data.

◆ intxAssert

fsp_err_t(* pci_api_t::intxAssert) (pci_ctrl_t *const p_ctrl)

Assert INTx interrupt.

Parameters

[in] p_ctrl Pointer to the PCI control block.

◆ intxDeassert

fsp_err_t(* pci_api_t::intxDeassert) (pci_ctrl_t *const p_ctrl)

Deassert INTx interrupt.

Parameters

[in] p_ctrl Pointer to the PCI control block.

◆ linkStatusGet

fsp_err_t(* pci_api_t::linkStatusGet) (pci_ctrl_t *const p_ctrl, pci_status_t *const p_status)

Get PCI Express link information.

Parameters

[in,out]	p_ctrl	Pointer to the PCI control block.
[out]	p_status	Memory address to return data.

◆ linkWidthChange

fsp_err_t(* pci_api_t::linkWidthChange) (pci_ctrl_t *const p_ctrl, uint32_t link_width, uint32_t option)

PCI Express link width change.

Parameters

[in]	p_ctrl	Pointer to the PCI control block.
[in]	link_width	Link width to change.
[in]	option	Option when link width to change.

◆ linkSpeedChange

fsp_err_t(* pci_api_t::linkSpeedChange) (pci_ctrl_t *const p_ctrl, pci_link_speed_t link_speed, uint32_t option)

PCI Express link speed change.

Parameters

[in]	p_ctrl	Pointer to the PCI control block.
[in]	link_speed	Link speed to change.
[in]	option	Option when link speed to change.

◆ linkEqualizationRequest

fsp_err_t(* pci_api_t::linkEqualizationRequest) (pci_ctrl_t *const p_ctrl)

PCI Express send link equalization.

Parameters

[in] p_ctrl Pointer to the PCI control block.

◆ callbackSet

fsp_err_t(* pci_api_t::callbackSet) (pci_ctrl_t *const p_ctrl, void(*p_callback)(pci_callback_args_t *), void const *const p_context, pci_callback_args_t *const p_callback_memory)

Specify callback function and optional context pointer and working memory pointer.

Parameters

[in]	p_ctrl	Control block set in pci_api_t::open call.
[in]	p_callback	Callback function to register
[in]	p_context	Pointer to send to callback function
[in]	p_working_memory	Pointer to volatile memory where callback structure can be allocated. Callback arguments allocated here are only valid during the callback.

◆ close

fsp_err_t(* pci_api_t::close) (pci_ctrl_t *const p_ctrl)

Close function for PCI device.

Parameters

[in] p_ctrl Pointer to the PCI control block.

◆ pci_instance_t

struct pci_instance_t

This structure encompasses everything that is needed to use an instance of this interface.

Data Fields
pci_ctrl_t *	p_ctrl	Pointer to the control structure for this instance.
pci_cfg_t const *	p_cfg	Pointer to the configuration structure for this instance.
pci_api_t const *	p_api	Pointer to the API structure for this instance.

Typedef Documentation

◆ pci_ctrl_t

typedef void pci_ctrl_t

PCI control block. Allocate an instance specific control block to pass into the PCI API calls.

Enumeration Type Documentation

◆ pci_event_t

enum pci_event_t

PCI events.

Enumerator
PCI_EVENT_INTA_INTERRUPT	INTA interrupt.
PCI_EVENT_INTB_INTERRUPT	INTB interrupt.
PCI_EVENT_INTC_INTERRUPT	INTC interrupt.
PCI_EVENT_INTD_INTERRUPT	INTD interrupt.
PCI_EVENT_MSI_INTERRUPT	MSI interrupt.
PCI_EVENT_MESSAGE_RECEIVE	Message receive.
PCI_EVENT_CORRECTABLE_ERROR	Correctable error.
PCI_EVENT_UNCORRECTABLE_ERROR_NON_FATAL	Non fatal error.
PCI_EVENT_UNCORRECTABLE_ERROR_FATAL	Fatal error.
PCI_EVENT_FUNCTION_LEVEL_RESET	Function level reset.
PCI_EVENT_LINK_EQUALIZATION_REQUEST	Link equalization request.
PCI_EVENT_LINK_WIDTH_CHANGE	Link width change.
PCI_EVENT_EVENT	Event interrupt.
PCI_EVENT_D3_EVENT	Non-D0 state transition request receive.
PCI_EVENT_PME_TURN_OFF_RCV_EVENT	PME_Turn_Off message receive.
PCI_EVENT_PME_STATUS_CLEAR	PME_STATUS clear output.
PCI_EVENT_PM_PME_RECEIVE	PM_PME message receive interrupt.
PCI_EVENT_POWEROFF_L2	POWEROFF indication on L2.

◆ pci_configuration_write_type_t

enum pci_configuration_write_type_t

PCI Configuration Write Type 0/1

Enumerator
PCI_CONFIGURATION_WRITE_TYPE_0	Configuration Write Type 0 (CfgWr0)
PCI_CONFIGURATION_WRITE_TYPE_1	Configuration Write Type 1 (CfgWr1)

◆ pci_configuration_read_type_t

enum pci_configuration_read_type_t

PCI Configuration Read Type 0/1

Enumerator
PCI_CONFIGURATION_READ_TYPE_0	Configuration Read Type 0 (CfgRd0)
PCI_CONFIGURATION_READ_TYPE_1	Configuration Read Type 1 (CfgRd1)

◆ pci_link_speed_t

enum pci_link_speed_t

PCI Express link speed

Enumerator
PCI_LINK_SPEED_2_5_GTS	2.5 GT/s PCI Express link
PCI_LINK_SPEED_5_0_GTS	5.0 GT/s PCI Express link
PCI_LINK_SPEED_8_0_GTS	8.0 GT/s PCI Express link
PCI_LINK_SPEED_16_0_GTS	16.0 GT/s PCI Express link

◆ pci_ltssm_state_t

enum pci_ltssm_state_t

PCI Express LTSSM state.

Enumerator
PCI_LTSSM_STATE_DETECT	LTSSM detect state.
PCI_LTSSM_STATE_POLLING	LTSSM polling state.
PCI_LTSSM_STATE_CONFIG	LTSSM configuration state.
PCI_LTSSM_STATE_L0	LTSSM L0 state.
PCI_LTSSM_STATE_L1	LTSSM L1 state.
PCI_LTSSM_STATE_L2	LTSSM L2 state.
PCI_LTSSM_STATE_RECOVERY	LTSSM recovery state.
PCI_LTSSM_STATE_DISABLE	LTSSM disable state.
PCI_LTSSM_STATE_LOOPBACK	LTSSM loopback state.

Detailed Description

Summary

Data Structures

Typedefs

Enumerations

Data Structure Documentation

◆ pci_configuration_register_init_t

◆ pci_configuration_register_transfer_t

◆ pci_io_register_transfer_t

◆ pci_message_transfer_t

◆ pci_status_t

◆ pci_callback_args_t

◆ pci_cfg_t

Data Fields

Field Documentation

◆ p_configuration_register_init_list

◆ p_callback

◆ pci_api_t

Data Fields

Field Documentation

◆ open

◆ selfConfigurationRegisterGet

◆ selfConfigurationRegisterSet

◆ configurationRegisterWrite

◆ configurationRegisterRead

◆ iORegisterWrite

◆ iORegisterRead

◆ messageWrite

◆ messageRead

◆ intxAssert

◆ intxDeassert

◆ linkStatusGet

◆ linkWidthChange

◆ linkSpeedChange

◆ linkEqualizationRequest

◆ callbackSet

◆ close

◆ pci_instance_t

Typedef Documentation

◆ pci_ctrl_t

Enumeration Type Documentation

◆ pci_event_t

◆ pci_configuration_write_type_t

◆ pci_configuration_read_type_t

◆ pci_link_speed_t

◆ pci_ltssm_state_t