On Wed, Aug 17, 2011 at 11:52:18AM -0700, Matt Thomas wrote: > On Aug 17, 2011, at 9:35 AM, David Young wrote: > >> int pci_msi_type(pci_chipset_tag_t pc, pci_msi_handle_t msih); > >> > >> return the type of msi allocated (PCI_CAP_MSI or PCI_CAP_MSIX). In the > >> latter case MSI vectors may not be contiguous. > > > > Does it matter to the driver whether or not the vectors are contiguous? > > Presumably there are no gaps in the available msirq? > > MSIX doesn't matter, MSI it does.
Can you give an example where a user of this API has to care whether the vectors are contiguous or not? > >> void pci_msi_disestablish(pci_chipset_tag_t pc, void *ih); > >> > >> Disestablishes but does not free the MSI. > > > > You mean, pci_msi_disestablish() does not free to the MSI handle's pool? > > Why not? > > It does. But not to the system pool. pci_msi_free does that. Does pci_msi_free() give back "excess" msirqs to the system pool? Can you give an example of how/why it is used? Dave -- David Young OJC Technologies [email protected] Urbana, IL * (217) 344-0444 x24
