diff options
Diffstat (limited to 'sys/powerpc/pseries/rtas_pci.c')
| -rw-r--r-- | sys/powerpc/pseries/rtas_pci.c | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/sys/powerpc/pseries/rtas_pci.c b/sys/powerpc/pseries/rtas_pci.c new file mode 100644 index 000000000000..02d1a559e7dd --- /dev/null +++ b/sys/powerpc/pseries/rtas_pci.c @@ -0,0 +1,208 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2011 Nathan Whitehorn + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/module.h> +#include <sys/bus.h> +#include <sys/conf.h> +#include <sys/kernel.h> +#include <sys/rman.h> + +#include <dev/ofw/openfirm.h> +#include <dev/ofw/ofw_pci.h> +#include <dev/ofw/ofw_bus.h> +#include <dev/ofw/ofw_bus_subr.h> +#include <dev/ofw/ofwpci.h> + +#include <dev/pci/pcivar.h> +#include <dev/pci/pcireg.h> + +#include <machine/bus.h> +#include <machine/intr_machdep.h> +#include <machine/md_var.h> +#include <machine/pio.h> +#include <machine/resource.h> +#include <machine/rtas.h> + +#include <vm/vm.h> +#include <vm/pmap.h> + +#include <powerpc/pseries/plpar_iommu.h> + +#include "pcib_if.h" +#include "iommu_if.h" + +/* + * Device interface. + */ +static int rtaspci_probe(device_t); +static int rtaspci_attach(device_t); + +/* + * pcib interface. + */ +static u_int32_t rtaspci_read_config(device_t, u_int, u_int, u_int, + u_int, int); +static void rtaspci_write_config(device_t, u_int, u_int, u_int, + u_int, u_int32_t, int); + +/* + * Driver methods. + */ +static device_method_t rtaspci_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, rtaspci_probe), + DEVMETHOD(device_attach, rtaspci_attach), + + /* pcib interface */ + DEVMETHOD(pcib_read_config, rtaspci_read_config), + DEVMETHOD(pcib_write_config, rtaspci_write_config), + + DEVMETHOD_END +}; + +struct rtaspci_softc { + struct ofw_pci_softc pci_sc; + + struct ofw_pci_register sc_pcir; + + cell_t read_pci_config, write_pci_config; + cell_t ex_read_pci_config, ex_write_pci_config; + int sc_extended_config; +}; + +DEFINE_CLASS_1(pcib, rtaspci_driver, rtaspci_methods, + sizeof(struct rtaspci_softc), ofw_pcib_driver); +DRIVER_MODULE(rtaspci, ofwbus, rtaspci_driver, 0, 0); + +static int +rtaspci_probe(device_t dev) +{ + const char *type; + + if (!rtas_exists()) + return (ENXIO); + + type = ofw_bus_get_type(dev); + + if (OF_getproplen(ofw_bus_get_node(dev), "used-by-rtas") < 0) + return (ENXIO); + if (type == NULL || strcmp(type, "pci") != 0) + return (ENXIO); + + device_set_desc(dev, "RTAS Host-PCI bridge"); + return (BUS_PROBE_GENERIC); +} + +static int +rtaspci_attach(device_t dev) +{ + struct rtaspci_softc *sc; + + sc = device_get_softc(dev); + + if (OF_getencprop(ofw_bus_get_node(dev), "reg", (pcell_t *)&sc->sc_pcir, + sizeof(sc->sc_pcir)) == -1) + return (ENXIO); + + sc->read_pci_config = rtas_token_lookup("read-pci-config"); + sc->write_pci_config = rtas_token_lookup("write-pci-config"); + sc->ex_read_pci_config = rtas_token_lookup("ibm,read-pci-config"); + sc->ex_write_pci_config = rtas_token_lookup("ibm,write-pci-config"); + + sc->sc_extended_config = 0; + OF_getencprop(ofw_bus_get_node(dev), "ibm,pci-config-space-type", + &sc->sc_extended_config, sizeof(sc->sc_extended_config)); + + return (ofw_pcib_attach(dev)); +} + +static uint32_t +rtaspci_read_config(device_t dev, u_int bus, u_int slot, u_int func, u_int reg, + int width) +{ + struct rtaspci_softc *sc; + uint32_t retval = 0xffffffff; + uint32_t config_addr; + int error, pcierror; + + sc = device_get_softc(dev); + + config_addr = ((bus & 0xff) << 16) | ((slot & 0x1f) << 11) | + ((func & 0x7) << 8) | (reg & 0xff); + if (sc->sc_extended_config) + config_addr |= (reg & 0xf00) << 16; + + if (sc->ex_read_pci_config != -1) + error = rtas_call_method(sc->ex_read_pci_config, 4, 2, + config_addr, sc->sc_pcir.phys_hi, + sc->sc_pcir.phys_mid, width, &pcierror, &retval); + else + error = rtas_call_method(sc->read_pci_config, 2, 2, + config_addr, width, &pcierror, &retval); + + /* Sign-extend output */ + switch (width) { + case 1: + retval = (int32_t)(int8_t)(retval); + break; + case 2: + retval = (int32_t)(int16_t)(retval); + break; + } + + if (error < 0 || pcierror != 0) + retval = 0xffffffff; + + return (retval); +} + +static void +rtaspci_write_config(device_t dev, u_int bus, u_int slot, u_int func, + u_int reg, uint32_t val, int width) +{ + struct rtaspci_softc *sc; + uint32_t config_addr; + int pcierror; + + sc = device_get_softc(dev); + + config_addr = ((bus & 0xff) << 16) | ((slot & 0x1f) << 11) | + ((func & 0x7) << 8) | (reg & 0xff); + if (sc->sc_extended_config) + config_addr |= (reg & 0xf00) << 16; + + if (sc->ex_write_pci_config != -1) + rtas_call_method(sc->ex_write_pci_config, 5, 1, config_addr, + sc->sc_pcir.phys_hi, sc->sc_pcir.phys_mid, + width, val, &pcierror); + else + rtas_call_method(sc->write_pci_config, 3, 1, config_addr, + width, val, &pcierror); +} |