diff options
Diffstat (limited to 'sys/dev/thunderbolt/tb_acpi_pcib.c')
| -rw-r--r-- | sys/dev/thunderbolt/tb_acpi_pcib.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/sys/dev/thunderbolt/tb_acpi_pcib.c b/sys/dev/thunderbolt/tb_acpi_pcib.c new file mode 100644 index 000000000000..947df3688535 --- /dev/null +++ b/sys/dev/thunderbolt/tb_acpi_pcib.c @@ -0,0 +1,181 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2022 Scott Long + * 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 "opt_acpi.h" +#include "opt_thunderbolt.h" + +/* ACPI identified PCIe bridge for Thunderbolt */ +#include <sys/types.h> +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/kernel.h> +#include <sys/module.h> +#include <sys/bus.h> +#include <sys/conf.h> +#include <sys/malloc.h> +#include <sys/sysctl.h> +#include <sys/lock.h> +#include <sys/param.h> +#include <sys/endian.h> + +#include <machine/bus.h> +#include <machine/resource.h> +#include <machine/stdarg.h> +#include <sys/rman.h> + +#include <machine/pci_cfgreg.h> +#include <dev/pci/pcireg.h> +#include <dev/pci/pcivar.h> +#include <dev/pci/pcib_private.h> +#include <dev/pci/pci_private.h> + +#include <contrib/dev/acpica/include/acpi.h> +#include <contrib/dev/acpica/include/accommon.h> +#include <dev/acpica/acpivar.h> +#include <dev/acpica/acpi_pcibvar.h> +#include <machine/md_var.h> + +#include <dev/thunderbolt/tb_reg.h> +#include <dev/thunderbolt/tb_pcib.h> +#include <dev/thunderbolt/nhi_var.h> +#include <dev/thunderbolt/nhi_reg.h> +#include <dev/thunderbolt/tbcfg_reg.h> +#include <dev/thunderbolt/tb_debug.h> + +static int tb_acpi_pcib_probe(device_t); +static int tb_acpi_pcib_attach(device_t); +static int tb_acpi_pcib_detach(device_t); + +/* ACPI attachment for Thudnerbolt Bridges */ + +static int +tb_acpi_pcib_probe(device_t dev) +{ + char desc[TB_DESC_MAX], desc1[TB_DESC_MAX]; + int val; + + if (pci_get_class(dev) != PCIC_BRIDGE || + pci_get_subclass(dev) != PCIS_BRIDGE_PCI || + acpi_disabled("pci")) + return (ENXIO); + if (acpi_get_handle(dev) == NULL) + return (ENXIO); + if (pci_cfgregopen() == 0) + return (ENXIO); + + /* + * Success? Specify a higher probe priority than the conventional + * Thunderbolt PCIb driver + */ + if ((val = tb_pcib_probe_common(dev, desc)) < 0) { + val++; + snprintf(desc1, TB_DESC_MAX, "ACPI %s", desc); + device_set_desc_copy(dev, desc1); + } + + return (val); +} + +static int +tb_acpi_pcib_attach(device_t dev) +{ + struct tb_pcib_softc *sc; + int error; + + error = tb_pcib_attach_common(dev); + if (error) + return (error); + + sc = device_get_softc(dev); + sc->ap_handle = acpi_get_handle(dev); + KASSERT(sc->ap_handle != NULL, ("ACPI handle cannot be NULL\n")); + + /* Execute OSUP in case the BIOS didn't */ + if (TB_IS_ROOT(sc)) { + ACPI_OBJECT_LIST list; + ACPI_OBJECT arg; + ACPI_BUFFER buf; + ACPI_STATUS s; + + tb_debug(sc, DBG_BRIDGE, "Executing OSUP\n"); + + list.Pointer = &arg; + list.Count = 1; + arg.Integer.Value = 0; + arg.Type = ACPI_TYPE_INTEGER; + buf.Length = ACPI_ALLOCATE_BUFFER; + buf.Pointer = NULL; + + s = AcpiEvaluateObject(sc->ap_handle, "\\_GPE.OSUP", &list, + &buf); + tb_debug(sc, DBG_BRIDGE|DBG_FULL, + "ACPI returned %d, buf= %p\n", s, buf.Pointer); + if (buf.Pointer != NULL) + tb_debug(sc, DBG_BRIDGE|DBG_FULL, "buffer= 0x%x\n", + *(uint32_t *)buf.Pointer); + + AcpiOsFree(buf.Pointer); + } + + pcib_attach_common(dev); + acpi_pcib_fetch_prt(dev, &sc->ap_prt); + + return (pcib_attach_child(dev)); +} + +static int +tb_acpi_pcib_detach(device_t dev) +{ + struct tb_pcib_softc *sc; + int error; + + sc = device_get_softc(dev); + tb_debug(sc, DBG_BRIDGE|DBG_ROUTER|DBG_EXTRA, "tb_acpi_pcib_detach\n"); + + error = pcib_detach(dev); + if (error == 0) + AcpiOsFree(sc->ap_prt.Pointer); + return (error); +} + +static device_method_t tb_acpi_pcib_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, tb_acpi_pcib_probe), + DEVMETHOD(device_attach, tb_acpi_pcib_attach), + DEVMETHOD(device_detach, tb_acpi_pcib_detach), + + /* Thunderbolt interface is inherited */ + + DEVMETHOD_END +}; + +DEFINE_CLASS_2(tbolt, tb_acpi_pcib_driver, tb_acpi_pcib_methods, + sizeof(struct tb_pcib_softc), pcib_driver, tb_pcib_driver); +DRIVER_MODULE_ORDERED(tb_acpi_pcib, pci, tb_acpi_pcib_driver, + NULL, NULL, SI_ORDER_MIDDLE); +MODULE_DEPEND(tb_acpi_pcib, acpi, 1, 1, 1); |