Solaris Source Insight: PCI bus driver moduls - npe Part 4
Thu Nov 12 17:11:35 CST 2009
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bus_ctl()
DDI_CTLOPS_REPORTDEV – report the device
DDI_CTLOPS_INITCHILD – bus specific intialization for a child attached to this npe instance. PCIe bus private data is allocated and initialized here. PCIe Bus Private Data contains commonly used PCI/PCIe information and offsets to key registers. Since npe bus_bdf in bus private data hasn't been initialized during npe attach, the root port number of a device in the private data is not valid. Generic pci-express interrupts and error handling are also enabled here.
DDI_CTLOPS_UNINITCHILD – bus specific operations when removing/detaching a PCI device node.
DDI_CTLOPS_REGSIZE/DDI_CTLOPS_NREGS – return the register number and register size of a specific register set. All register sets are store in “reg” properties.
DDI_CTLOPS_PEEK:/DDI_CTLOPS_POKE – PCI configure space peek/poke.
DDI_CTLOPS_ATTACH/DDI_CTLOPS_DETACH – operations to support suspending and resuming.
All those control commands can't be handled in this function will be passed to the bus control function of parent, rootnex.
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intr_ops()
Interrupt related operations.
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DDI_INTROP_SUPPORTED_TYPES
Returns the hardware interrupt types that are supported by both the device and the host.
[i86pc/io/pci/pci_common.c]
216 |_______|_______/*
217 |_______|_______ * First we determine the interrupt types supported by the
218 |_______|_______ * device itself, then we filter them through what the OS
219 |_______|_______ * and system supports. We determine system-level
220 |_______|_______ * interrupt type support for anything other than fixed intrs
221 |_______|_______ * through the psm_intr_ops vector
222 |_______|_______ */
The fixed type of interrupt is support by default. The MSI and MSI-X interrupt capabilities are reported throught the PCI capability regiesters. The interrupt types supported by the device should be filterred through the host support.
[i86pc/io/pci/pci_common.c]
257 |_______|_______/*
258 |_______|_______ * Filter device-level types through system-level support
259 |_______|_______ */
260 |_______|_______tmp_hdl.ih_type = types;
261 |_______|_______if ((*psm_intr_ops)(rdip, &tmp_hdl, PSM_INTR_OP_CHECK_MSI,
262 |_______|_______ &types) != PSM_SUCCESS)
263 |_______|_______|_______goto SUPPORTED_TYPES_OUT;
When MSI/MSI-X are supported, the MSI/MSI-X cap locations are exported via properties “pci-msi-capid-pointer” and “pci-msix-capid-pointer”.
ddi_intr_get_supported_types(9F) relies on this intr operation.
To be continued …