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Create /dev/efidev to provide an ioctl interface to

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userland.  It supports userland interfaces to UEFI Runtime Services. This is
indended to the the MI portion of EFI RuntimeServices support.

Differential Revision: https://reviews.freebsd.org/D8128
Reviewed by: kib@, wblock@, Ganael Laplanche
This commit is contained in:
Warner Losh 2016-10-11 22:24:30 +00:00
parent 58a3e50de6
commit f79d484dff
7 changed files with 307 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
sys/amd64/amd64/efirt.c
View File

@ -61,6 +61,7 @@ __FBSDID("$FreeBSD$");
static struct efi_systbl *efi_systbl;
static struct efi_cfgtbl *efi_cfgtbl;
static struct efi_rt *efi_runtime;
static struct cdev *efi_cdev;
static int efi_status2err[25] = {
0, /* EFI_SUCCESS */
@ -402,13 +403,15 @@ efi_init(void)
return (ENXIO);
}
return (0);
return (efidev_init(&efi_cdev));
}
static void
efi_uninit(void)
{
efidev_uninit(efi_cdev);
efi_destroy_1t1_map();
efi_systbl = NULL;

1
sys/conf/files
View File

@ -1431,6 +1431,7 @@ dev/ed/if_ed_novell.c optional ed
dev/ed/if_ed_rtl80x9.c optional ed
dev/ed/if_ed_pccard.c optional ed pccard
dev/ed/if_ed_pci.c optional ed pci
dev/efidev/efidev.c optional efirt
dev/eisa/eisa_if.m standard
dev/eisa/eisaconf.c optional eisa
dev/e1000/if_em.c optional em \

199
sys/dev/efidev/efidev.c Normal file
View File

@ -0,0 +1,199 @@
/*-
* Copyright (c) 2016 Netflix, Inc.
* 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
* in this position and unchanged.
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <machine/efi.h>
#include <sys/efiio.h>
static d_ioctl_t efidev_ioctl;
static struct cdevsw efi_cdevsw = {
.d_name = "efi",
.d_version = D_VERSION,
.d_ioctl = efidev_ioctl,
};
/* ARGSUSED */
static int
efidev_ioctl(struct cdev *dev __unused, u_long cmd, caddr_t addr,
int flags __unused, struct thread *td __unused)
{
int error;
switch (cmd) {
case EFIIOC_GET_TABLE:
{
struct efi_get_table_ioc *egtioc =
(struct efi_get_table_ioc *)addr;
error = efi_get_table(&egtioc->uuid, &egtioc->ptr);
break;
}
case EFIIOC_GET_TIME:
{
struct efi_tm *tm = (struct efi_tm *)addr;
error = efi_get_time(tm);
break;
}
case EFIIOC_SET_TIME:
{
struct efi_tm *tm = (struct efi_tm *)addr;
error = efi_set_time(tm);
break;
}
case EFIIOC_VAR_GET:
{
struct efi_var_ioc *ev = (struct efi_var_ioc *)addr;
void *data;
efi_char *name;
data = malloc(ev->datasize, M_TEMP, M_WAITOK);
name = malloc(ev->namesize, M_TEMP, M_WAITOK);
error = copyin(ev->name, name, ev->namesize);
if (error)
goto vg_out;
if (name[ev->namesize / sizeof(efi_char) - 1] != 0) {
error = EINVAL;
goto vg_out;
}
error = efi_var_get(name, &ev->vendor, &ev->attrib,
&ev->datasize, data);
if (error == 0) {
error = copyout(data, ev->data, ev->datasize);
} else if (error == EOVERFLOW) {
/*
* Pass back the size we really need, but
* convert the error to 0 so the copyout
* happens. datasize was updated in the
* efi_var_get call.
*/
ev->data = NULL;
error = 0;
}
vg_out:
free(data, M_TEMP);
free(name, M_TEMP);
break;
}
case EFIIOC_VAR_NEXT:
{
struct efi_var_ioc *ev = (struct efi_var_ioc *)addr;
efi_char *name;
name = malloc(ev->namesize, M_TEMP, M_WAITOK);
if (name == NULL) {
error = ENOMEM;
goto vn_out;
}
error = copyin(ev->name, name, ev->namesize);
if (error)
goto vn_out;
/* Note: namesize is the buffer size, not the string lenght */
error = efi_var_nextname(&ev->namesize, name, &ev->vendor);
if (error == 0) {
error = copyout(name, ev->name, ev->namesize);
} else if (error == EOVERFLOW) {
ev->name = NULL;
error = 0;
}
vn_out:
if (name != NULL)
free(name, M_TEMP);
break;
}
case EFIIOC_VAR_SET:
{
struct efi_var_ioc *ev = (struct efi_var_ioc *)addr;
void *data = NULL;
efi_char *name;
/* datasize == 0 -> delete (more or less) */
if (ev->datasize > 0)
data = malloc(ev->datasize, M_TEMP, M_WAITOK);
name = malloc(ev->namesize, M_TEMP, M_WAITOK);
if (ev->datasize) {
error = copyin(ev->data, data, ev->datasize);
if (error)
goto vs_out;
}
error = copyin(ev->name, name, ev->namesize);
if (error)
goto vs_out;
if (name[ev->namesize / sizeof(efi_char) - 1] != 0) {
error = EINVAL;
goto vs_out;
}
error = efi_var_set(name, &ev->vendor, ev->attrib, ev->datasize,
data);
vs_out:
if (data != NULL)
free(data, M_TEMP);
free(name, M_TEMP);
break;
}
default:
error = ENOTTY;
break;
}
return (error);
}
int
efidev_init(struct cdev **cdev)
{
*cdev = make_dev(&efi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0700,
"efidev");
return (0);
}
int
efidev_uninit(struct cdev *cdev)
{
destroy_dev(cdev);
return (0);
}

39
sys/i386/include/efi.h Normal file
View File

@ -0,0 +1,39 @@
/*-
* Copyright (c) 2016 The FreeBSD Foundation
* All rights reserved.
*
* This software was developed by Konstantin Belousov <kib@FreeBSD.org>
* under sponsorship from the FreeBSD Foundation.
*
* 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.
*
* $FreeBSD$
*/
#ifndef __I386_INCLUDE_EFI_H_
#define __I386_INCLUDE_EFI_H_
#define EFIABI_ATTR /* __attribute__((ms_abi)) */ /* clang fails with this */
/* Note: we don't actually support this on i386 yet */
#endif /* __I386_INCLUDE_EFI_H_ */

3
sys/modules/efirt/Makefile
View File

@ -1,9 +1,10 @@
# $FreeBSD$
.PATH: ${.CURDIR}/../../${MACHINE}/${MACHINE}
.PATH: ${.CURDIR}/../../dev/efidev
KMOD= efirt
SRCS= efirt.c
SRCS= efirt.c efidev.c
SRCS+= device_if.h bus_if.h
.include <bsd.kmod.mk>

3
sys/sys/efi.h
View File

@ -165,6 +165,9 @@ struct efi_systbl {
#ifdef _KERNEL
extern vm_paddr_t efi_systbl_phys;
struct cdev;
int efidev_init(struct cdev **);
int efidev_uninit(struct cdev *);
#endif /* _KERNEL */
#endif /* _SYS_EFI_H_ */

59
sys/sys/efiio.h Normal file
View File

@ -0,0 +1,59 @@
/*-
* Copyright (c) 2016 Netflix, Inc.
* 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
* in this position and unchanged.
* 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.
*
* $FreeBSD$
*/
#ifndef _SYS_EFIIO_H_
#define _SYS_EFIIO_H_
#include <sys/ioccom.h>
#include <sys/uuid.h>
#include <sys/efi.h>
struct efi_get_table_ioc
{
struct uuid uuid; /* UUID to look up */
void *ptr; /* Pointer to table in KVA space */
};
struct efi_var_ioc
{
efi_char *name; /* User pointer to name, in wide chars */
size_t namesize; /* Number of wide characters in name */
struct uuid vendor; /* Vendor's UUID for variable */
uint32_t attrib; /* Attributes */
void *data; /* User pointer to the data */
size_t datasize; /* Number of *bytes* in the data */
};
#define EFIIOC_GET_TABLE _IOWR('E', 1, struct efi_get_table_ioc)
#define EFIIOC_GET_TIME _IOR('E', 2, struct efi_tm)
#define EFIIOC_SET_TIME _IOW('E', 3, struct efi_tm)
#define EFIIOC_VAR_GET _IOWR('E', 4, struct efi_var_ioc)
#define EFIIOC_VAR_NEXT _IOWR('E', 5, struct efi_var_ioc)
#define EFIIOC_VAR_SET _IOWR('E', 6, struct efi_var_ioc)
#endif /* _SYS_EFIIO_H_ */