Introduce the new kernel sub-tree x86 which should contain all the code

shared and generalized between our current amd64, i386 and pc98.

This is just an initial step that should lead to a more complete effort.
For the moment, a very simple porting of cpufreq modules, BIOS calls and
the whole MD specific ISA bus part is added to the sub-tree but ideally
a lot of code might be added and more shared support should grow.

Sponsored by:	Sandvine Incorporated
Reviewed by:	emaste, kib, jhb, imp
Discussed on:	arch
MFC:		3 weeks

1 files changed, 297 insertions, 0 deletions

diff --git a/sys/x86/bios/vpd.c b/sys/x86/bios/vpd.c
new file mode 100644
index 0000000..246b76d
--- /dev/null
+++ b/sys/x86/bios/vpd.c
@@ -0,0 +1,297 @@
+/*-
+ * Copyright (c) 2003 Matthew N. Dodd <winter@jurai.net>
+ * 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("$FreeBSD$");
+
+/*
+ * VPD decoder for IBM systems (Thinkpads)
+ * http://www-1.ibm.com/support/docview.wss?uid=psg1MIGR-45120
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/socket.h>
+#include <sys/sysctl.h>
+
+#include <sys/module.h>
+#include <sys/bus.h>
+
+#include <machine/bus.h>
+#include <machine/resource.h>
+#include <sys/rman.h>
+
+#include <vm/vm.h>
+#include <vm/vm_param.h>
+#include <vm/pmap.h>
+#include <machine/md_var.h>
+#include <machine/pc/bios.h>
+
+/*
+ * Vital Product Data
+ */
+struct vpd {
+	u_int16_t	Header;			/* 0x55AA */
+	u_int8_t	Signature[3];		/* Always 'VPD' */
+	u_int8_t	Length;			/* Sructure Length */
+
+	u_int8_t	Reserved[7];		/* Reserved */
+
+	u_int8_t	BuildID[9];		/* BIOS Build ID */
+	u_int8_t	BoxSerial[7];		/* Box Serial Number */
+	u_int8_t	PlanarSerial[11];	/* Motherboard Serial Number */
+	u_int8_t	MachType[7];		/* Machine Type/Model */
+	u_int8_t	Checksum;		/* Checksum */
+} __packed;
+
+struct vpd_softc {
+	device_t		dev;
+	struct resource *	res;
+	int			rid;
+
+	struct vpd *		vpd;
+
+	struct sysctl_ctx_list  ctx;
+
+	char		BuildID[10];
+	char		BoxSerial[8];
+	char		PlanarSerial[12];
+	char		MachineType[5];
+	char		MachineModel[4];
+};
+
+#define	VPD_START	0xf0000
+#define	VPD_STEP	0x10
+#define	VPD_OFF		2
+#define	VPD_LEN		3
+#define	VPD_SIG		"VPD"
+
+#define	RES2VPD(res)	((struct vpd *)rman_get_virtual(res))
+#define	ADDR2VPD(addr)	((struct vpd *)BIOS_PADDRTOVADDR(addr))
+
+static devclass_t vpd_devclass;
+
+static void	vpd_identify	(driver_t *, device_t);
+static int	vpd_probe	(device_t);
+static int	vpd_attach	(device_t);
+static int	vpd_detach	(device_t);
+static int	vpd_modevent	(module_t, int, void *);
+
+static int	vpd_cksum	(struct vpd *);
+
+SYSCTL_NODE(_hw, OID_AUTO, vpd, CTLFLAG_RD, NULL, NULL);
+SYSCTL_NODE(_hw_vpd, OID_AUTO, machine, CTLFLAG_RD, NULL, NULL);
+SYSCTL_NODE(_hw_vpd_machine, OID_AUTO, type, CTLFLAG_RD, NULL, NULL);
+SYSCTL_NODE(_hw_vpd_machine, OID_AUTO, model, CTLFLAG_RD, NULL, NULL);
+SYSCTL_NODE(_hw_vpd, OID_AUTO, build_id, CTLFLAG_RD, NULL, NULL);
+SYSCTL_NODE(_hw_vpd, OID_AUTO, serial, CTLFLAG_RD, NULL, NULL);
+SYSCTL_NODE(_hw_vpd_serial, OID_AUTO, box, CTLFLAG_RD, NULL, NULL);
+SYSCTL_NODE(_hw_vpd_serial, OID_AUTO, planar, CTLFLAG_RD, NULL, NULL);
+
+static void
+vpd_identify (driver_t *driver, device_t parent)
+{
+	device_t child;
+	u_int32_t addr;
+	int length;
+	int rid;
+
+	if (!device_is_alive(parent))
+		return;
+
+	addr = bios_sigsearch(VPD_START, VPD_SIG, VPD_LEN, VPD_STEP, VPD_OFF);
+	if (addr != 0) {
+		rid = 0;
+		length = ADDR2VPD(addr)->Length;
+
+		child = BUS_ADD_CHILD(parent, 5, "vpd", -1);
+		device_set_driver(child, driver);
+		bus_set_resource(child, SYS_RES_MEMORY, rid, addr, length);
+		device_set_desc(child, "Vital Product Data Area");
+	}
+		
+	return;
+}
+
+static int
+vpd_probe (device_t dev)
+{
+	struct resource *res;
+	int rid;
+	int error;
+
+	error = 0;
+	rid = 0;
+	res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
+	if (res == NULL) {
+		device_printf(dev, "Unable to allocate memory resource.\n");
+		error = ENOMEM;
+		goto bad;
+	}
+
+	if (vpd_cksum(RES2VPD(res)))
+		device_printf(dev, "VPD checksum failed.  BIOS update may be required.\n");
+
+bad:
+	if (res)
+		bus_release_resource(dev, SYS_RES_MEMORY, rid, res);
+	return (error);
+}
+
+static int
+vpd_attach (device_t dev)
+{
+	struct vpd_softc *sc;
+	char unit[4];
+	int error;
+
+	sc = device_get_softc(dev);
+	error = 0;
+
+	sc->dev = dev;
+	sc->rid = 0;
+	sc->res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->rid,
+		RF_ACTIVE);
+	if (sc->res == NULL) {
+		device_printf(dev, "Unable to allocate memory resource.\n");
+		error = ENOMEM;
+		goto bad;
+	}
+	sc->vpd = RES2VPD(sc->res);
+
+	snprintf(unit, sizeof(unit), "%d", device_get_unit(sc->dev));
+	snprintf(sc->MachineType, 5, "%.4s", sc->vpd->MachType);
+	snprintf(sc->MachineModel, 4, "%.3s", sc->vpd->MachType+4);
+	snprintf(sc->BuildID, 10, "%.9s", sc->vpd->BuildID);
+	snprintf(sc->BoxSerial, 8, "%.7s", sc->vpd->BoxSerial);
+	snprintf(sc->PlanarSerial, 12, "%.11s", sc->vpd->PlanarSerial);
+
+	sysctl_ctx_init(&sc->ctx);
+	SYSCTL_ADD_STRING(&sc->ctx,
+		SYSCTL_STATIC_CHILDREN(_hw_vpd_machine_type), OID_AUTO,
+		unit, CTLFLAG_RD|CTLFLAG_DYN, sc->MachineType, 0, NULL);
+	SYSCTL_ADD_STRING(&sc->ctx,
+		SYSCTL_STATIC_CHILDREN(_hw_vpd_machine_model), OID_AUTO,
+		unit, CTLFLAG_RD|CTLFLAG_DYN, sc->MachineModel, 0, NULL);
+	SYSCTL_ADD_STRING(&sc->ctx,
+		SYSCTL_STATIC_CHILDREN(_hw_vpd_build_id), OID_AUTO,
+		unit, CTLFLAG_RD|CTLFLAG_DYN, sc->BuildID, 0, NULL);
+	SYSCTL_ADD_STRING(&sc->ctx,
+		SYSCTL_STATIC_CHILDREN(_hw_vpd_serial_box), OID_AUTO,
+		unit, CTLFLAG_RD|CTLFLAG_DYN, sc->BoxSerial, 0, NULL);
+	SYSCTL_ADD_STRING(&sc->ctx,
+		SYSCTL_STATIC_CHILDREN(_hw_vpd_serial_planar), OID_AUTO,
+		unit, CTLFLAG_RD|CTLFLAG_DYN, sc->PlanarSerial, 0, NULL);
+
+	device_printf(dev, "Machine Type: %.4s, Model: %.3s, Build ID: %.9s\n",
+		sc->MachineType, sc->MachineModel, sc->BuildID);
+	device_printf(dev, "Box Serial: %.7s, Planar Serial: %.11s\n",
+		sc->BoxSerial, sc->PlanarSerial);
+		
+	return (0);
+bad:
+	if (sc->res)
+		bus_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res);
+	return (error);
+}
+
+static int
+vpd_detach (device_t dev)
+{
+	struct vpd_softc *sc;
+
+	sc = device_get_softc(dev);
+
+	if (sc->res)
+		bus_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res);
+
+	sysctl_ctx_free(&sc->ctx);
+
+	return (0);
+}
+
+static int
+vpd_modevent (mod, what, arg)
+        module_t        mod;
+        int             what;
+        void *          arg;
+{
+	device_t *	devs;
+	int		count;
+	int		i;
+
+	switch (what) {
+	case MOD_LOAD:
+		break;
+	case MOD_UNLOAD:
+		devclass_get_devices(vpd_devclass, &devs, &count);
+		for (i = 0; i < count; i++) {
+			device_delete_child(device_get_parent(devs[i]), devs[i]);
+		}
+		break;
+	default:
+		break;
+	}
+
+	return (0);
+}
+
+static device_method_t vpd_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_identify,      vpd_identify),
+	DEVMETHOD(device_probe,         vpd_probe),
+	DEVMETHOD(device_attach,        vpd_attach),
+	DEVMETHOD(device_detach,        vpd_detach),
+	{ 0, 0 }
+};
+
+static driver_t vpd_driver = {
+	"vpd",
+	vpd_methods,
+	sizeof(struct vpd_softc),
+};
+
+DRIVER_MODULE(vpd, nexus, vpd_driver, vpd_devclass, vpd_modevent, 0);
+MODULE_VERSION(vpd, 1);
+
+/*
+ * Perform a checksum over the VPD structure, starting with
+ * the BuildID.  (Jean Delvare <khali@linux-fr.org>)
+ */
+static int
+vpd_cksum (struct vpd *v)
+{
+	u_int8_t *ptr;
+	u_int8_t cksum;
+	int i;
+
+	ptr = (u_int8_t *)v;
+	cksum = 0;
+	for (i = offsetof(struct vpd, BuildID); i < v->Length ; i++)
+		cksum += ptr[i];
+	return (cksum);
+}