Read address from MSI Capability Structure [on hold]

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Is it possible to find the location of the MSI Capability Structure associated with a particular interrupt? Specifically, I need to know the PCI address that when written to, triggers that interrupt.



MSI interrupts can easily be initialize with the pci_alloc_irq_vectors(9) function, but this simply provides the irq number and no reference to the capability structure.



For reference, the capability structure is described in this document: https://pcisig.com/sites/default/files/specification_documents/msi-x_ecn.pdf




drivers pci




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put on hold as unclear what you're asking by Rui F Ribeiro, schily, Thomas, Jesse_b, SivaPrasath 2 days ago


Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.










  • 1




    Can you please explain what is unclear in the question? I requested something very specfic, i.e. how to obtain the location [address] of the MSI capability structure. In any case, I found the answer so could someone please unlock this question so that I can properly answer it?
    – Cain Rose
    yesterday

















up vote
2
down vote

favorite












Is it possible to find the location of the MSI Capability Structure associated with a particular interrupt? Specifically, I need to know the PCI address that when written to, triggers that interrupt.



MSI interrupts can easily be initialize with the pci_alloc_irq_vectors(9) function, but this simply provides the irq number and no reference to the capability structure.



For reference, the capability structure is described in this document: https://pcisig.com/sites/default/files/specification_documents/msi-x_ecn.pdf




drivers pci




share|improve this question













put on hold as unclear what you're asking by Rui F Ribeiro, schily, Thomas, Jesse_b, SivaPrasath 2 days ago


Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.










  • 1




    Can you please explain what is unclear in the question? I requested something very specfic, i.e. how to obtain the location [address] of the MSI capability structure. In any case, I found the answer so could someone please unlock this question so that I can properly answer it?
    – Cain Rose
    yesterday













up vote
2
down vote

favorite









up vote
2
down vote

favorite











Is it possible to find the location of the MSI Capability Structure associated with a particular interrupt? Specifically, I need to know the PCI address that when written to, triggers that interrupt.



MSI interrupts can easily be initialize with the pci_alloc_irq_vectors(9) function, but this simply provides the irq number and no reference to the capability structure.



For reference, the capability structure is described in this document: https://pcisig.com/sites/default/files/specification_documents/msi-x_ecn.pdf




drivers pci




share|improve this question













Is it possible to find the location of the MSI Capability Structure associated with a particular interrupt? Specifically, I need to know the PCI address that when written to, triggers that interrupt.



MSI interrupts can easily be initialize with the pci_alloc_irq_vectors(9) function, but this simply provides the irq number and no reference to the capability structure.



For reference, the capability structure is described in this document: https://pcisig.com/sites/default/files/specification_documents/msi-x_ecn.pdf





drivers pci





share|improve this question












share|improve this question




share|improve this question








edited yesterday
























asked Aug 4 at 0:06









Cain Rose

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put on hold as unclear what you're asking by Rui F Ribeiro, schily, Thomas, Jesse_b, SivaPrasath 2 days ago


Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.






put on hold as unclear what you're asking by Rui F Ribeiro, schily, Thomas, Jesse_b, SivaPrasath 2 days ago


Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.









  • 1




    Can you please explain what is unclear in the question? I requested something very specfic, i.e. how to obtain the location [address] of the MSI capability structure. In any case, I found the answer so could someone please unlock this question so that I can properly answer it?
    – Cain Rose
    yesterday













  • 1




    Can you please explain what is unclear in the question? I requested something very specfic, i.e. how to obtain the location [address] of the MSI capability structure. In any case, I found the answer so could someone please unlock this question so that I can properly answer it?
    – Cain Rose
    yesterday








1




1




Can you please explain what is unclear in the question? I requested something very specfic, i.e. how to obtain the location [address] of the MSI capability structure. In any case, I found the answer so could someone please unlock this question so that I can properly answer it?
– Cain Rose
yesterday





Can you please explain what is unclear in the question? I requested something very specfic, i.e. how to obtain the location [address] of the MSI capability structure. In any case, I found the answer so could someone please unlock this question so that I can properly answer it?
– Cain Rose
yesterday
















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