MSI interrupt

NTDEV
1

Hi,

I have few doubts related to MSI(multi message MSI to be precise).

My HBA supports 32 message. In driver inf file, I ask for 32 message to be allocated for my driver.
HKR,“Interrupt Management\MessageSignaledInterruptProperties”, MessageNumberLimit,0x00010001, 32

  1. How can i know how many message has been allocated?
  2. How can i know the list of Message ID’s allocated ?
  3. When MSI_ISR is called, should i check whether the interrupt is from my HBA or not( like in case of pin based interrupt)?

Thanks,
Amogha

2

Any help on this please

3

Use StorPortGetMSIInfo API (in your HwStorPassiveIntialize routine),

ULONG
StorPortGetMSIInfo (
IN PVOID HwDeviceExtension,
IN ULONG MessageId,
OUT PMESSAGE_INTERRUPT_INFORMATION InterruptInfo
);

If you pass an un-assigned or invalid MessageId - the API will return
‘STOR_STATUS_INVALID_PARAMETER’
*
*Regards,
Gokul T V

On Thu, Apr 28, 2011 at 12:02 PM, wrote:

> Any help on this please
>
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