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vmd.h File Reference

VMD driver public interface. More...

Macros

#define MAX_VMD_TARGET   24
 

Enumerations

enum  spdk_vmd_led_state {
  SPDK_VMD_LED_STATE_OFF , SPDK_VMD_LED_STATE_IDENTIFY , SPDK_VMD_LED_STATE_FAULT , SPDK_VMD_LED_STATE_REBUILD ,
  SPDK_VMD_LED_STATE_UNKNOWN
}
 State of the LEDs.
 

Functions

int spdk_vmd_init (void)
 Enumerate VMD devices and hook them into the spdk pci subsystem.
 
void spdk_vmd_fini (void)
 Release any resources allocated by the VMD library via spdk_vmd_init().
 
int spdk_vmd_pci_device_list (struct spdk_pci_addr vmd_addr, struct spdk_pci_device *nvme_list)
 Returns a list of nvme devices found on the given vmd pci BDF.
 
int spdk_vmd_set_led_state (struct spdk_pci_device *pci_device, enum spdk_vmd_led_state state)
 Sets the state of the LED on specified PCI device.
 
int spdk_vmd_get_led_state (struct spdk_pci_device *pci_device, enum spdk_vmd_led_state *state)
 Retrieves the state of the LED on specified PCI device.
 
int spdk_vmd_hotplug_monitor (void)
 Checks for hotplug/hotremove events of the devices behind the VMD.
 
int spdk_vmd_remove_device (const struct spdk_pci_addr *addr)
 Removes a given device from the PCI subsystem simulating a hot-remove.
 
int spdk_vmd_rescan (void)
 Forces a rescan of the devices behind the VMD.
 

Detailed Description

VMD driver public interface.

Function Documentation

◆ spdk_vmd_get_led_state()

int spdk_vmd_get_led_state ( struct spdk_pci_device * pci_device,
enum spdk_vmd_led_state * state )

Retrieves the state of the LED on specified PCI device.

The device needs to be behind VMD.

Parameters
pci_devicePCI device
statecurrent LED state
Returns
0 on success, negative errno otherwise

◆ spdk_vmd_hotplug_monitor()

int spdk_vmd_hotplug_monitor ( void )

Checks for hotplug/hotremove events of the devices behind the VMD.

Needs to be called periodically to detect them.

Returns
number of hotplug events detected or negative errno in case of errors

◆ spdk_vmd_init()

int spdk_vmd_init ( void )

Enumerate VMD devices and hook them into the spdk pci subsystem.

Returns
0 on success, -1 on failure

◆ spdk_vmd_pci_device_list()

int spdk_vmd_pci_device_list ( struct spdk_pci_addr vmd_addr,
struct spdk_pci_device * nvme_list )

Returns a list of nvme devices found on the given vmd pci BDF.

Parameters
vmd_addrpci BDF of the vmd device to return end device list
nvme_listbuffer of exactly MAX_VMD_TARGET to return spdk_pci_device array.
Returns
Returns count of nvme device attached to input VMD.

◆ spdk_vmd_remove_device()

int spdk_vmd_remove_device ( const struct spdk_pci_addr * addr)

Removes a given device from the PCI subsystem simulating a hot-remove.

If the device is being actively used by another module, the actual detach might be deferred.

Parameters
addrAddress of a PCI device to remove.
Returns
0 if the device was successfully removed, negative errno otherwise.

◆ spdk_vmd_rescan()

int spdk_vmd_rescan ( void )

Forces a rescan of the devices behind the VMD.

If a device was previously removed through spdk_vmd_remove_device() this will cause it to be reattached.

Returns
number of new devices found during scanning or negative errno on failure.

◆ spdk_vmd_set_led_state()

int spdk_vmd_set_led_state ( struct spdk_pci_device * pci_device,
enum spdk_vmd_led_state state )

Sets the state of the LED on specified PCI device.

The device needs to be behind VMD.

Parameters
pci_devicePCI device
stateLED state to set
Returns
0 on success, negative errno otherwise