Author: jhibbits
Date: Sat Sep 14 03:30:34 2019
New Revision: 352313
URL: https://svnweb.freebsd.org/changeset/base/352313
Log:
powerpc64/powernv: Add opal NVRAM driver for PowerNV systems
Add a very basic NVRAM driver for OPAL which can be used by the IBM
powerpc-utils nvram utility, not to be confused with the base nvram utility,
which only operates on powermac_nvram.
The IBM utility handles all partitions itself, treating the nvram device as
a plain store.
An alternative would be to manage partitions in the kernel, and augment the
base nvram utility to deal with different backing stores, but that
complicates the driver significantly. Instead, present the same interface
IBM's utlity expects, and we get the usage for free.
Tested by: bdragon
Added:
head/sys/modules/opal_nvram/
head/sys/modules/opal_nvram/Makefile (contents, props changed)
head/sys/powerpc/powernv/opal_nvram.c (contents, props changed)
Modified:
head/sys/conf/files.powerpc
head/sys/modules/Makefile
head/sys/powerpc/powernv/opal.h
head/sys/powerpc/powernv/opal_hmi.c
Modified: head/sys/conf/files.powerpc
==============================================================================
--- head/sys/conf/files.powerpc Fri Sep 13 23:03:56 2019 (r352312)
+++ head/sys/conf/files.powerpc Sat Sep 14 03:30:34 2019 (r352313)
@@ -192,6 +192,7 @@ powerpc/powernv/opal_flash.c optional powernv
opalflas
powerpc/powernv/opal_hmi.c optional powernv
powerpc/powernv/opal_i2c.c optional iicbus fdt powernv
powerpc/powernv/opal_i2cm.c optional iicbus fdt powernv
+powerpc/powernv/opal_nvram.c optional powernv nvram
powerpc/powernv/opal_pci.c optional powernv pci
powerpc/powernv/opal_sensor.c optional powernv
powerpc/powernv/opalcall.S optional powernv
Modified: head/sys/modules/Makefile
==============================================================================
--- head/sys/modules/Makefile Fri Sep 13 23:03:56 2019 (r352312)
+++ head/sys/modules/Makefile Sat Sep 14 03:30:34 2019 (r352313)
@@ -762,10 +762,11 @@ _wi= wi
.if ${MACHINE_ARCH} == "powerpc64"
_ipmi= ipmi
+_nvram= opal_nvram
.endif
.if ${MACHINE_ARCH} == "powerpc64" || ${MACHINE_ARCH} == "powerpc"
# Don't build powermac_nvram for powerpcspe, it's never supported.
-_nvram= powermac_nvram
+_nvram+= powermac_nvram
.endif
.if ${MACHINE_CPUARCH} == "sparc64"
Added: head/sys/modules/opal_nvram/Makefile
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/modules/opal_nvram/Makefile Sat Sep 14 03:30:34 2019
(r352313)
@@ -0,0 +1,10 @@
+# $FreeBSD$
+
+.PATH: ${SRCTOP}/sys/powerpc/powernv
+
+KMOD= opal_nvram
+SRCS= opal_nvram.c
+SRCS+= bus_if.h device_if.h
+SRCS+= ofw_bus_if.h
+
+.include <bsd.kmod.mk>
Modified: head/sys/powerpc/powernv/opal.h
==============================================================================
--- head/sys/powerpc/powernv/opal.h Fri Sep 13 23:03:56 2019
(r352312)
+++ head/sys/powerpc/powernv/opal.h Sat Sep 14 03:30:34 2019
(r352313)
@@ -45,6 +45,8 @@ int opal_call(uint64_t token, ...);
#define OPAL_RTC_WRITE 4
#define OPAL_CEC_POWER_DOWN 5
#define OPAL_CEC_REBOOT 6
+#define OPAL_READ_NVRAM 7
+#define OPAL_WRITE_NVRAM 8
#define OPAL_HANDLE_INTERRUPT 9
#define OPAL_POLL_EVENTS 10
#define OPAL_PCI_CONFIG_READ_BYTE 13
Modified: head/sys/powerpc/powernv/opal_hmi.c
==============================================================================
--- head/sys/powerpc/powernv/opal_hmi.c Fri Sep 13 23:03:56 2019
(r352312)
+++ head/sys/powerpc/powernv/opal_hmi.c Sat Sep 14 03:30:34 2019
(r352313)
@@ -82,16 +82,34 @@ opal_hmi_event_handler(void *unused, struct opal_msg *
}
static int
+opal_hmi_handler2(struct trapframe *frame)
+{
+ uint64_t flags;
+ int err;
+
+ flags = 0;
+ err = opal_call(OPAL_HANDLE_HMI2, vtophys(&flags));
+
+ if (flags & OPAL_HMI_FLAGS_TOD_TB_FAIL)
+ panic("TOD/TB recovery failure");
+
+ if (err == OPAL_SUCCESS)
+ return (0);
+
+ printf("HMI handler failed! OPAL error code: %d\n", err);
+
+ return (-1);
+}
+
+static int
opal_hmi_handler(struct trapframe *frame)
{
int err;
err = opal_call(OPAL_HANDLE_HMI);
- if (err == OPAL_SUCCESS) {
- mtspr(SPR_HMER, 0);
+ if (err == OPAL_SUCCESS)
return (0);
- }
printf("HMI handler failed! OPAL error code: %d\n", err);
@@ -105,7 +123,9 @@ opal_setup_hmi(void *data)
if (opal_check() != 0)
return;
- if (opal_call(OPAL_CHECK_TOKEN, OPAL_HANDLE_HMI) == OPAL_TOKEN_PRESENT)
+ if (opal_call(OPAL_CHECK_TOKEN, OPAL_HANDLE_HMI2) == OPAL_TOKEN_PRESENT)
+ hmi_handler = opal_hmi_handler2;
+ else if (opal_call(OPAL_CHECK_TOKEN, OPAL_HANDLE_HMI) ==
OPAL_TOKEN_PRESENT)
hmi_handler = opal_hmi_handler;
else {
printf("Warning: No OPAL HMI handler found.\n");
Added: head/sys/powerpc/powernv/opal_nvram.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/powerpc/powernv/opal_nvram.c Sat Sep 14 03:30:34 2019
(r352313)
@@ -0,0 +1,276 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2019 Justin Hibbits
+ *
+ * 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 ``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 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.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/module.h>
+#include <sys/bus.h>
+#include <sys/conf.h>
+#include <sys/disk.h>
+#include <sys/kernel.h>
+#include <sys/uio.h>
+
+#include <dev/ofw/openfirm.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#include <machine/bus.h>
+#include <machine/md_var.h>
+#include <machine/pio.h>
+#include <machine/resource.h>
+
+#include "opal.h"
+
+#include <sys/rman.h>
+
+#include <vm/vm.h>
+#include <vm/pmap.h>
+
+#define NVRAM_BUFSIZE (65536) /* 64k blocks */
+
+struct opal_nvram_softc {
+ device_t sc_dev;
+ uint32_t sc_size;
+ uint8_t *sc_buf;
+ vm_paddr_t sc_buf_phys;
+
+ struct cdev *sc_cdev;
+ int sc_isopen;
+};
+
+/*
+ * Device interface.
+ */
+static int opal_nvram_probe(device_t);
+static int opal_nvram_attach(device_t);
+static int opal_nvram_detach(device_t);
+
+/*
+ * Driver methods.
+ */
+static device_method_t opal_nvram_methods[] = {
+ /* Device interface */
+ DEVMETHOD(device_probe, opal_nvram_probe),
+ DEVMETHOD(device_attach, opal_nvram_attach),
+ DEVMETHOD(device_detach, opal_nvram_detach),
+
+ { 0, 0 }
+};
+
+static driver_t opal_nvram_driver = {
+ "opal_nvram",
+ opal_nvram_methods,
+ sizeof(struct opal_nvram_softc)
+};
+
+static devclass_t opal_nvram_devclass;
+
+DRIVER_MODULE(opal_nvram, opal, opal_nvram_driver, opal_nvram_devclass, 0, 0);
+
+/*
+ * Cdev methods.
+ */
+
+static d_open_t opal_nvram_open;
+static d_close_t opal_nvram_close;
+static d_read_t opal_nvram_read;
+static d_write_t opal_nvram_write;
+static d_ioctl_t opal_nvram_ioctl;
+
+static struct cdevsw opal_nvram_cdevsw = {
+ .d_version = D_VERSION,
+ .d_flags = D_NEEDGIANT,
+ .d_open = opal_nvram_open,
+ .d_close = opal_nvram_close,
+ .d_read = opal_nvram_read,
+ .d_write = opal_nvram_write,
+ .d_ioctl = opal_nvram_ioctl,
+ .d_name = "nvram",
+};
+
+static int
+opal_nvram_probe(device_t dev)
+{
+
+ if (!ofw_bus_is_compatible(dev, "ibm,opal-nvram"))
+ return (ENXIO);
+
+ device_set_desc(dev, "OPAL NVRAM");
+ return (BUS_PROBE_DEFAULT);
+}
+
+static int
+opal_nvram_attach(device_t dev)
+{
+ struct opal_nvram_softc *sc;
+ phandle_t node;
+ int err;
+
+ node = ofw_bus_get_node(dev);
+ sc = device_get_softc(dev);
+
+ sc->sc_dev = dev;
+
+ err = OF_getencprop(node, "#bytes", &sc->sc_size,
+ sizeof(sc->sc_size));
+
+ if (err < 0)
+ return (ENXIO);
+
+ sc->sc_buf = contigmalloc(NVRAM_BUFSIZE, M_DEVBUF, M_WAITOK,
+ 0, BUS_SPACE_MAXADDR, PAGE_SIZE, 0);
+ if (sc->sc_buf == NULL) {
+ device_printf(dev, "No memory for buffer.\n");
+ return (ENXIO);
+ }
+ sc->sc_buf_phys = pmap_kextract((vm_offset_t)sc->sc_buf);
+ sc->sc_cdev = make_dev(&opal_nvram_cdevsw, 0, 0, 0, 0600,
+ "nvram");
+ sc->sc_cdev->si_drv1 = sc;
+
+ return (0);
+}
+
+static int
+opal_nvram_detach(device_t dev)
+{
+ struct opal_nvram_softc *sc;
+
+ sc = device_get_softc(dev);
+
+ if (sc->sc_cdev != NULL)
+ destroy_dev(sc->sc_cdev);
+ if (sc->sc_buf != NULL)
+ contigfree(sc->sc_buf, NVRAM_BUFSIZE, M_DEVBUF);
+
+ return (0);
+}
+
+static int
+opal_nvram_open(struct cdev *dev, int flags, int fmt, struct thread *td)
+{
+ struct opal_nvram_softc *sc = dev->si_drv1;
+
+ if (sc->sc_isopen)
+ return EBUSY;
+ sc->sc_isopen = 1;
+ return (0);
+}
+
+static int
+opal_nvram_close(struct cdev *dev, int fflag, int devtype, struct thread *td)
+{
+ struct opal_nvram_softc *sc = dev->si_drv1;
+
+ sc->sc_isopen = 0;
+ return (0);
+}
+
+static int
+opal_nvram_read(struct cdev *dev, struct uio *uio, int ioflag)
+{
+ struct opal_nvram_softc *sc = dev->si_drv1;
+ int rv, amnt;
+
+ rv = 0;
+ while (uio->uio_resid > 0) {
+ amnt = MIN(uio->uio_resid, sc->sc_size - uio->uio_offset);
+ amnt = MIN(amnt, NVRAM_BUFSIZE);
+ if (amnt == 0)
+ break;
+
+ rv = opal_call(OPAL_READ_NVRAM, sc->sc_buf_phys,
+ amnt, uio->uio_offset);
+ if (rv != OPAL_SUCCESS) {
+ switch (rv) {
+ case OPAL_HARDWARE:
+ rv = EIO;
+ break;
+ case OPAL_PARAMETER:
+ rv = EINVAL;
+ break;
+ }
+ break;
+ }
+ rv = uiomove(sc->sc_buf, amnt, uio);
+ if (rv != 0)
+ break;
+ }
+ return (rv);
+}
+
+static int
+opal_nvram_write(struct cdev *dev, struct uio *uio, int ioflag)
+{
+ off_t offset;
+ int rv, amnt;
+ struct opal_nvram_softc *sc = dev->si_drv1;
+
+ rv = 0;
+ while (uio->uio_resid > 0) {
+ amnt = MIN(uio->uio_resid, sc->sc_size - uio->uio_offset);
+ amnt = MIN(amnt, NVRAM_BUFSIZE);
+ if (amnt == 0) {
+ rv = ENOSPC;
+ break;
+ }
+ offset = uio->uio_offset;
+ rv = uiomove(sc->sc_buf, amnt, uio);
+ if (rv != 0)
+ break;
+ rv = opal_call(OPAL_WRITE_NVRAM, sc->sc_buf_phys, amnt,
+ offset);
+ if (rv != OPAL_SUCCESS) {
+ switch (rv) {
+ case OPAL_HARDWARE:
+ rv = EIO;
+ break;
+ case OPAL_PARAMETER:
+ rv = EINVAL;
+ break;
+ }
+ break;
+ }
+ }
+ return (rv);
+}
+
+static int
+opal_nvram_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag,
+ struct thread *td)
+{
+ struct opal_nvram_softc *sc = dev->si_drv1;
+
+ switch (cmd) {
+ case DIOCGMEDIASIZE:
+ *(off_t *)data = sc->sc_size;
+ return (0);
+ }
+ return (EINVAL);
+}
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