Solaris Source Insight: PCI bus driver moduls - npe Part 4

Thu Nov 12 17:11:35 CST 2009

• 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.

• intr_ops()

Interrupt related operations.

• 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 …