From d6e546f14a581a2fb495e470ff7bf73ec4282395 Mon Sep 17 00:00:00 2001 From: jhb Date: Fri, 2 Mar 2012 20:38:04 +0000 Subject: - Add a bus_dma tag to each PCI bus that is a child of a Host-PCI bridge. The tag enforces a single restriction that all DMA transactions must not cross a 4GB boundary. Note that while this restriction technically only applies to PCI-express, this change applies it to all PCI devices as it is simpler to implement that way and errs on the side of caution. - Add a softc structure for PCI bus devices to hold the bus_dma tag and a new pci_attach_common() routine that performs actions common to the attach phase of all PCI bus drivers. Right now this only consists of a bootverbose printf and the allocate of a bus_dma tag if necessary. - Adjust all PCI bus drivers to allocate a PCI bus softc and to call pci_attach_common() from their attach routines. MFC after: 2 weeks --- sys/powerpc/ofw/ofw_pcibus.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) (limited to 'sys/powerpc/ofw') diff --git a/sys/powerpc/ofw/ofw_pcibus.c b/sys/powerpc/ofw/ofw_pcibus.c index 9618e4c..c611bb5 100644 --- a/sys/powerpc/ofw/ofw_pcibus.c +++ b/sys/powerpc/ofw/ofw_pcibus.c @@ -95,8 +95,8 @@ struct ofw_pcibus_devinfo { static devclass_t pci_devclass; -DEFINE_CLASS_1(pci, ofw_pcibus_driver, ofw_pcibus_methods, 1 /* no softc */, - pci_driver); +DEFINE_CLASS_1(pci, ofw_pcibus_driver, ofw_pcibus_methods, + sizeof(struct pci_softc), pci_driver); DRIVER_MODULE(ofw_pcibus, pcib, ofw_pcibus_driver, pci_devclass, 0, 0); MODULE_VERSION(ofw_pcibus, 1); MODULE_DEPEND(ofw_pcibus, pci, 1, 1, 1); @@ -116,12 +116,13 @@ static int ofw_pcibus_attach(device_t dev) { u_int busno, domain; + int error; + error = pci_attach_common(dev); + if (error) + return (error); domain = pcib_get_domain(dev); busno = pcib_get_bus(dev); - if (bootverbose) - device_printf(dev, "domain=%d, physical bus=%d\n", - domain, busno); /* * Attach those children represented in the device tree. -- cgit v1.1