Date: Mon, 26 Jan 2015 22:22:50 +0000 (UTC) From: Nathan Whitehorn <nwhitehorn@FreeBSD.org> To: src-committers@freebsd.org, svn-src-projects@freebsd.org Subject: svn commit: r277779 - in projects/powernv: conf powerpc/powernv Message-ID: <201501262222.t0QMMoOv005751@svn.freebsd.org>
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Author: nwhitehorn Date: Mon Jan 26 22:22:50 2015 New Revision: 277779 URL: https://svnweb.freebsd.org/changeset/base/277779 Log: Add driver for OPAL PCI interface. This is compile-tested only at present; I expect IOMMU-related issues on real hardware. Added: projects/powernv/powerpc/powernv/opal_pci.c (contents, props changed) Modified: projects/powernv/conf/files.powerpc projects/powernv/powerpc/powernv/opal.h Modified: projects/powernv/conf/files.powerpc ============================================================================== --- projects/powernv/conf/files.powerpc Mon Jan 26 21:41:54 2015 (r277778) +++ projects/powernv/conf/files.powerpc Mon Jan 26 22:22:50 2015 (r277779) @@ -172,6 +172,8 @@ powerpc/powermac/uninorthpci.c optional powerpc/powermac/vcoregpio.c optional powermac powerpc/powernv/opal.c optional powernv powerpc/powernv/opal_console.c optional powernv +powerpc/powernv/opal_dev.c optional powernv +powerpc/powernv/opal_pci.c optional powernv pci powerpc/powernv/opalcall.S optional powernv powerpc/powernv/platform_powernv.c optional powernv powerpc/powerpc/altivec.c standard Modified: projects/powernv/powerpc/powernv/opal.h ============================================================================== --- projects/powernv/powerpc/powernv/opal.h Mon Jan 26 21:41:54 2015 (r277778) +++ projects/powernv/powerpc/powernv/opal.h Mon Jan 26 22:22:50 2015 (r277779) @@ -38,15 +38,21 @@ int opal_check(void); /* Call an OPAL method. Any pointers passed must be real-mode accessible! */ int opal_call(uint64_t token, ...); -#define OPAL_CONSOLE_WRITE 1 -#define OPAL_CONSOLE_READ 2 -#define OPAL_CEC_POWER_DOWN 5 -#define OPAL_CEC_REBOOT 6 -#define OPAL_SET_XIVE 19 -#define OPAL_GET_XIVE 20 -#define OPAL_START_CPU 41 +#define OPAL_CONSOLE_WRITE 1 +#define OPAL_CONSOLE_READ 2 +#define OPAL_CEC_POWER_DOWN 5 +#define OPAL_CEC_REBOOT 6 +#define OPAL_PCI_CONFIG_READ_BYTE 13 +#define OPAL_PCI_CONFIG_READ_HALF_WORD 14 +#define OPAL_PCI_CONFIG_READ_WORD 15 +#define OPAL_PCI_CONFIG_WRITE_BYTE 16 +#define OPAL_PCI_CONFIG_WRITE_HALF_WORD 17 +#define OPAL_PCI_CONFIG_WRITE_WORD 18 +#define OPAL_SET_XIVE 19 +#define OPAL_GET_XIVE 20 +#define OPAL_START_CPU 41 -#define OPAL_SUCCESS 0 -#define OPAL_BUSY_EVENT -12 +#define OPAL_SUCCESS 0 +#define OPAL_BUSY_EVENT -12 #endif Added: projects/powernv/powerpc/powernv/opal_pci.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ projects/powernv/powerpc/powernv/opal_pci.c Mon Jan 26 22:22:50 2015 (r277779) @@ -0,0 +1,215 @@ +/*- + * Copyright (c) 2015 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/cdefs.h> +__FBSDID("$FreeBSD$"); +#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 <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/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 <sys/rman.h> + +#include <vm/vm.h> +#include <vm/pmap.h> + +#include <powerpc/ofw/ofw_pci.h> + +#include "pcib_if.h" +#include "iommu_if.h" +#include "opal.h" + +/* + * Device interface. + */ +static int opalpci_probe(device_t); +static int opalpci_attach(device_t); + +/* + * pcib interface. + */ +static u_int32_t opalpci_read_config(device_t, u_int, u_int, u_int, + u_int, int); +static void opalpci_write_config(device_t, u_int, u_int, u_int, + u_int, u_int32_t, int); + +/* + * Driver methods. + */ +static device_method_t opalpci_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, opalpci_probe), + DEVMETHOD(device_attach, opalpci_attach), + + /* pcib interface */ + DEVMETHOD(pcib_read_config, opalpci_read_config), + DEVMETHOD(pcib_write_config, opalpci_write_config), + + DEVMETHOD_END +}; + +struct opalpci_softc { + struct ofw_pci_softc ofw_sc; + uint64_t phb_id; +}; + +static devclass_t opalpci_devclass; +DEFINE_CLASS_1(pcib, opalpci_driver, opalpci_methods, + sizeof(struct opalpci_softc), ofw_pci_driver); +DRIVER_MODULE(opalpci, ofwbus, opalpci_driver, opalpci_devclass, 0, 0); + +static int +opalpci_probe(device_t dev) +{ + const char *type; + + if (opal_check() != 0) + return (ENXIO); + + type = ofw_bus_get_type(dev); + + if (type == NULL || strcmp(type, "pci") != 0) + return (ENXIO); + + if (!OF_hasprop(ofw_bus_get_node(dev), "ibm,opal-phbid")) + return (ENXIO); + + device_set_desc(dev, "OPAL Host-PCI bridge"); + return (BUS_PROBE_GENERIC); +} + +static int +opalpci_attach(device_t dev) +{ + struct opalpci_softc *sc; + cell_t id[2]; + + sc = device_get_softc(dev); + + switch (OF_getproplen(ofw_bus_get_node(dev), "ibm,opal-phbid")) { + case 8: + OF_getencprop(ofw_bus_get_node(dev), "ibm,opal-phbid", id, 8); + sc->phb_id = ((uint64_t)id[0] << 32) | id[1]; + break; + case 4: + OF_getencprop(ofw_bus_get_node(dev), "ibm,opal-phbid", id, 4); + sc->phb_id = id[0]; + break; + default: + device_printf(dev, "PHB ID property had wrong length (%zd)\n", + OF_getproplen(ofw_bus_get_node(dev), "ibm,opal-phbid")); + return (ENXIO); + } + + return (ofw_pci_attach(dev)); +} + +static uint32_t +opalpci_read_config(device_t dev, u_int bus, u_int slot, u_int func, u_int reg, + int width) +{ + struct opalpci_softc *sc; + uint64_t config_addr; + uint8_t byte; + uint16_t half; + uint32_t word; + int error; + + sc = device_get_softc(dev); + + config_addr = (bus << 8) | ((slot & 0x1f) << 3) | (func & 0x7); + + /* Sign-extend output */ + switch (width) { + case 1: + error = opal_call(OPAL_PCI_CONFIG_READ_BYTE, sc->phb_id, + config_addr, reg, vtophys(&byte)); + word = byte; + break; + case 2: + error = opal_call(OPAL_PCI_CONFIG_READ_HALF_WORD, sc->phb_id, + config_addr, reg, vtophys(&half)); + word = half; + break; + case 4: + error = opal_call(OPAL_PCI_CONFIG_READ_WORD, sc->phb_id, + config_addr, reg, vtophys(&word)); + break; + default: + word = 0xffffffff; + } + + if (error != OPAL_SUCCESS) + word = 0xffffffff; + + return (word); +} + +static void +opalpci_write_config(device_t dev, u_int bus, u_int slot, u_int func, + u_int reg, uint32_t val, int width) +{ + struct opalpci_softc *sc; + uint64_t config_addr; + + sc = device_get_softc(dev); + + config_addr = (bus << 8) | ((slot & 0x1f) << 3) | (func & 0x7); + + /* Sign-extend output */ + switch (width) { + case 1: + opal_call(OPAL_PCI_CONFIG_WRITE_BYTE, sc->phb_id, config_addr, + reg, val); + break; + case 2: + opal_call(OPAL_PCI_CONFIG_WRITE_HALF_WORD, sc->phb_id, + config_addr, reg, val); + break; + case 4: + opal_call(OPAL_PCI_CONFIG_WRITE_WORD, sc->phb_id, config_addr, + reg, val); + break; + } +} +
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