Author: jchandra Date: Mon Nov 19 02:55:18 2018 New Revision: 340597 URL: https://svnweb.freebsd.org/changeset/base/340597
Log: pci_host_generic*: basic implementation of bus range Both ACPI and FDT support bus ranges for pci host bridges. Update pci_host_generic*.[ch] with a default implementation to support this. This will be used in the next set of changes for ACPI based host bridge. No functional changes in this commit. Reviewed by: andrew Differential Revision: https://reviews.freebsd.org/D17657 Modified: head/sys/dev/pci/pci_host_generic.c head/sys/dev/pci/pci_host_generic.h head/sys/dev/pci/pci_host_generic_acpi.c head/sys/dev/pci/pci_host_generic_fdt.c Modified: head/sys/dev/pci/pci_host_generic.c ============================================================================== --- head/sys/dev/pci/pci_host_generic.c Mon Nov 19 02:43:34 2018 (r340596) +++ head/sys/dev/pci/pci_host_generic.c Mon Nov 19 02:55:18 2018 (r340597) @@ -147,13 +147,14 @@ generic_pcie_read_config(device_t dev, u_int bus, u_in uint64_t offset; uint32_t data; - if ((bus > PCI_BUSMAX) || (slot > PCI_SLOTMAX) || - (func > PCI_FUNCMAX) || (reg > PCIE_REGMAX)) + sc = device_get_softc(dev); + if ((bus < sc->bus_start) || (bus > sc->bus_end)) return (~0U); + if ((slot > PCI_SLOTMAX) || (func > PCI_FUNCMAX) || + (reg > PCIE_REGMAX)) + return (~0U); - sc = device_get_softc(dev); - - offset = PCIE_ADDR_OFFSET(bus, slot, func, reg); + offset = PCIE_ADDR_OFFSET(bus - sc->bus_start, slot, func, reg); t = sc->bst; h = sc->bsh; @@ -183,14 +184,15 @@ generic_pcie_write_config(device_t dev, u_int bus, u_i bus_space_tag_t t; uint64_t offset; - if ((bus > PCI_BUSMAX) || (slot > PCI_SLOTMAX) || - (func > PCI_FUNCMAX) || (reg > PCIE_REGMAX)) + sc = device_get_softc(dev); + if ((bus < sc->bus_start) || (bus > sc->bus_end)) return; + if ((slot > PCI_SLOTMAX) || (func > PCI_FUNCMAX) || + (reg > PCIE_REGMAX)) + return; - sc = device_get_softc(dev); + offset = PCIE_ADDR_OFFSET(bus - sc->bus_start, slot, func, reg); - offset = PCIE_ADDR_OFFSET(bus, slot, func, reg); - t = sc->bst; h = sc->bsh; @@ -221,14 +223,11 @@ generic_pcie_read_ivar(device_t dev, device_t child, i uintptr_t *result) { struct generic_pcie_core_softc *sc; - int secondary_bus; sc = device_get_softc(dev); if (index == PCIB_IVAR_BUS) { - /* this pcib adds only pci bus 0 as child */ - secondary_bus = 0; - *result = secondary_bus; + *result = sc->bus_start; return (0); } Modified: head/sys/dev/pci/pci_host_generic.h ============================================================================== --- head/sys/dev/pci/pci_host_generic.h Mon Nov 19 02:43:34 2018 (r340596) +++ head/sys/dev/pci/pci_host_generic.h Mon Nov 19 02:55:18 2018 (r340597) @@ -56,6 +56,8 @@ struct generic_pcie_core_softc { struct rman io_rman; struct resource *res; struct resource *res1; + int bus_start; + int bus_end; int ecam; bus_space_tag_t bst; bus_space_handle_t bsh; Modified: head/sys/dev/pci/pci_host_generic_acpi.c ============================================================================== --- head/sys/dev/pci/pci_host_generic_acpi.c Mon Nov 19 02:43:34 2018 (r340596) +++ head/sys/dev/pci/pci_host_generic_acpi.c Mon Nov 19 02:55:18 2018 (r340597) @@ -125,7 +125,7 @@ pci_host_generic_acpi_attach(device_t dev) struct generic_pcie_acpi_softc *sc; ACPI_HANDLE handle; ACPI_STATUS status; - int error; + int error, bus_start; sc = device_get_softc(dev); @@ -136,10 +136,14 @@ pci_host_generic_acpi_attach(device_t dev) device_printf(dev, "Bus is%s cache-coherent\n", sc->base.coherent ? "" : " not"); - if (!ACPI_FAILURE(acpi_GetInteger(handle, "_BBN", &sc->base.ecam))) - sc->base.ecam >>= 7; - else + if (!ACPI_FAILURE(acpi_GetInteger(handle, "_BBN", &bus_start))) { + sc->base.ecam = bus_start >> 7; + sc->base.bus_start = bus_start & 0x7F; + } else { sc->base.ecam = 0; + sc->base.bus_start = 0; + } + sc->base.bus_end = 0xFF; acpi_pcib_fetch_prt(dev, &sc->ap_prt); @@ -194,17 +198,12 @@ static int generic_pcie_acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) { - ACPI_HANDLE handle; struct generic_pcie_acpi_softc *sc; - int secondary_bus; sc = device_get_softc(dev); if (index == PCIB_IVAR_BUS) { - handle = acpi_get_handle(dev); - if (ACPI_FAILURE(acpi_GetInteger(handle, "_BBN", &secondary_bus))) - secondary_bus = sc->base.ecam * 0x80; - *result = secondary_bus; + *result = sc->base.ecam * 0x80 + sc->base.bus_start; return (0); } Modified: head/sys/dev/pci/pci_host_generic_fdt.c ============================================================================== --- head/sys/dev/pci/pci_host_generic_fdt.c Mon Nov 19 02:43:34 2018 (r340596) +++ head/sys/dev/pci/pci_host_generic_fdt.c Mon Nov 19 02:55:18 2018 (r340597) @@ -152,6 +152,9 @@ pci_host_generic_attach(device_t dev) device_printf(dev, "Bus is%s cache-coherent\n", sc->base.coherent ? "" : " not"); + /* TODO parse FDT bus ranges */ + sc->base.bus_start = 0; + sc->base.bus_end = 0xFF; error = pci_host_generic_core_attach(dev); if (error != 0) return (error); _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
