7282444b10
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
314 lines
7.6 KiB
C
314 lines
7.6 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*
|
|
* Copyright (c) 2007, Juniper Networks, Inc.
|
|
* Copyright (c) 2012-2013, SRI International
|
|
* All rights reserved.
|
|
*
|
|
* Portions of this software were developed by SRI International and the
|
|
* University of Cambridge Computer Laboratory under DARPA/AFRL contract
|
|
* (FA8750-10-C-0237) ("CTSRD"), as part of the DARPA CRASH research
|
|
* programme.
|
|
*
|
|
* 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.
|
|
* 3. Neither the name of the author nor the names of any co-contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* 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 "opt_cfi.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/ioccom.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/types.h>
|
|
#include <sys/uio.h>
|
|
|
|
#include <sys/cfictl.h>
|
|
|
|
#include <machine/atomic.h>
|
|
#include <machine/bus.h>
|
|
|
|
#include <dev/cfi/cfi_var.h>
|
|
|
|
static d_open_t cfi_devopen;
|
|
static d_close_t cfi_devclose;
|
|
static d_read_t cfi_devread;
|
|
static d_write_t cfi_devwrite;
|
|
static d_ioctl_t cfi_devioctl;
|
|
|
|
struct cdevsw cfi_cdevsw = {
|
|
.d_version = D_VERSION,
|
|
.d_flags = 0,
|
|
.d_name = cfi_driver_name,
|
|
.d_open = cfi_devopen,
|
|
.d_close = cfi_devclose,
|
|
.d_read = cfi_devread,
|
|
.d_write = cfi_devwrite,
|
|
.d_ioctl = cfi_devioctl,
|
|
};
|
|
|
|
/*
|
|
* Begin writing into a new block/sector. We read the sector into
|
|
* memory and keep updating that, until we move into another sector
|
|
* or the process stops writing. At that time we write the whole
|
|
* sector to flash (see cfi_block_finish). To avoid unneeded erase
|
|
* cycles, keep a pristine copy of the sector on hand.
|
|
*/
|
|
int
|
|
cfi_block_start(struct cfi_softc *sc, u_int ofs)
|
|
{
|
|
union {
|
|
uint8_t *x8;
|
|
uint16_t *x16;
|
|
uint32_t *x32;
|
|
} ptr;
|
|
u_int rofs, rsz;
|
|
uint32_t val;
|
|
int r;
|
|
|
|
rofs = 0;
|
|
for (r = 0; r < sc->sc_regions; r++) {
|
|
rsz = sc->sc_region[r].r_blocks * sc->sc_region[r].r_blksz;
|
|
if (ofs < rofs + rsz)
|
|
break;
|
|
rofs += rsz;
|
|
}
|
|
if (r == sc->sc_regions)
|
|
return (EFAULT);
|
|
|
|
sc->sc_wrbufsz = sc->sc_region[r].r_blksz;
|
|
sc->sc_wrbuf = malloc(sc->sc_wrbufsz, M_TEMP, M_WAITOK);
|
|
sc->sc_wrofs = ofs - (ofs - rofs) % sc->sc_wrbufsz;
|
|
|
|
/* Read the block from flash for byte-serving. */
|
|
ptr.x8 = sc->sc_wrbuf;
|
|
for (r = 0; r < sc->sc_wrbufsz; r += sc->sc_width) {
|
|
val = cfi_read_raw(sc, sc->sc_wrofs + r);
|
|
switch (sc->sc_width) {
|
|
case 1:
|
|
*(ptr.x8)++ = val;
|
|
break;
|
|
case 2:
|
|
*(ptr.x16)++ = val;
|
|
break;
|
|
case 4:
|
|
*(ptr.x32)++ = val;
|
|
break;
|
|
}
|
|
}
|
|
sc->sc_wrbufcpy = malloc(sc->sc_wrbufsz, M_TEMP, M_WAITOK);
|
|
memcpy(sc->sc_wrbufcpy, sc->sc_wrbuf, sc->sc_wrbufsz);
|
|
sc->sc_writing = 1;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Finish updating the current block/sector by writing the compound
|
|
* set of changes to the flash.
|
|
*/
|
|
int
|
|
cfi_block_finish(struct cfi_softc *sc)
|
|
{
|
|
int error;
|
|
|
|
error = cfi_write_block(sc);
|
|
free(sc->sc_wrbuf, M_TEMP);
|
|
free(sc->sc_wrbufcpy, M_TEMP);
|
|
sc->sc_wrbuf = NULL;
|
|
sc->sc_wrbufsz = 0;
|
|
sc->sc_wrofs = 0;
|
|
sc->sc_writing = 0;
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
cfi_devopen(struct cdev *dev, int oflags, int devtype, struct thread *td)
|
|
{
|
|
struct cfi_softc *sc;
|
|
|
|
sc = dev->si_drv1;
|
|
/* We allow only 1 open. */
|
|
if (!atomic_cmpset_acq_ptr((uintptr_t *)&sc->sc_opened,
|
|
(uintptr_t)NULL, (uintptr_t)td->td_proc))
|
|
return (EBUSY);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
cfi_devclose(struct cdev *dev, int fflag, int devtype, struct thread *td)
|
|
{
|
|
struct cfi_softc *sc;
|
|
int error;
|
|
|
|
sc = dev->si_drv1;
|
|
/* Sanity. Not really necessary. */
|
|
if (sc->sc_opened != td->td_proc)
|
|
return (ENXIO);
|
|
|
|
error = (sc->sc_writing) ? cfi_block_finish(sc) : 0;
|
|
sc->sc_opened = NULL;
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
cfi_devread(struct cdev *dev, struct uio *uio, int ioflag)
|
|
{
|
|
union {
|
|
uint8_t x8[4];
|
|
uint16_t x16[2];
|
|
uint32_t x32[1];
|
|
} buf;
|
|
struct cfi_softc *sc;
|
|
u_int ofs;
|
|
uint32_t val;
|
|
int error;
|
|
|
|
sc = dev->si_drv1;
|
|
|
|
error = (sc->sc_writing) ? cfi_block_finish(sc) : 0;
|
|
if (!error)
|
|
error = (uio->uio_offset > sc->sc_size) ? EIO : 0;
|
|
|
|
while (error == 0 && uio->uio_resid > 0 &&
|
|
uio->uio_offset < sc->sc_size) {
|
|
ofs = uio->uio_offset;
|
|
val = cfi_read_raw(sc, ofs);
|
|
switch (sc->sc_width) {
|
|
case 1:
|
|
buf.x8[0] = val;
|
|
break;
|
|
case 2:
|
|
buf.x16[0] = val;
|
|
break;
|
|
case 4:
|
|
buf.x32[0] = val;
|
|
break;
|
|
}
|
|
ofs &= sc->sc_width - 1;
|
|
error = uiomove(buf.x8 + ofs,
|
|
MIN(uio->uio_resid, sc->sc_width - ofs), uio);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
cfi_devwrite(struct cdev *dev, struct uio *uio, int ioflag)
|
|
{
|
|
struct cfi_softc *sc;
|
|
u_int ofs, top;
|
|
int error;
|
|
|
|
sc = dev->si_drv1;
|
|
|
|
error = (uio->uio_offset > sc->sc_size) ? EIO : 0;
|
|
while (error == 0 && uio->uio_resid > 0 &&
|
|
uio->uio_offset < sc->sc_size) {
|
|
ofs = uio->uio_offset;
|
|
|
|
/*
|
|
* Finish the current block if we're about to write
|
|
* to a different block.
|
|
*/
|
|
if (sc->sc_writing) {
|
|
top = sc->sc_wrofs + sc->sc_wrbufsz;
|
|
if (ofs < sc->sc_wrofs || ofs >= top)
|
|
cfi_block_finish(sc);
|
|
}
|
|
|
|
/* Start writing to a (new) block if applicable. */
|
|
if (!sc->sc_writing) {
|
|
error = cfi_block_start(sc, uio->uio_offset);
|
|
if (error)
|
|
break;
|
|
}
|
|
|
|
top = sc->sc_wrofs + sc->sc_wrbufsz;
|
|
error = uiomove(sc->sc_wrbuf + ofs - sc->sc_wrofs,
|
|
MIN(top - ofs, uio->uio_resid), uio);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
cfi_devioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag,
|
|
struct thread *td)
|
|
{
|
|
struct cfi_softc *sc;
|
|
struct cfiocqry *rq;
|
|
int error;
|
|
u_char val;
|
|
|
|
sc = dev->si_drv1;
|
|
error = 0;
|
|
|
|
switch (cmd) {
|
|
case CFIOCQRY:
|
|
if (sc->sc_writing) {
|
|
error = cfi_block_finish(sc);
|
|
if (error)
|
|
break;
|
|
}
|
|
rq = (struct cfiocqry *)data;
|
|
if (rq->offset >= sc->sc_size / sc->sc_width)
|
|
return (ESPIPE);
|
|
if (rq->offset + rq->count > sc->sc_size / sc->sc_width)
|
|
return (ENOSPC);
|
|
|
|
while (!error && rq->count--) {
|
|
val = cfi_read_qry(sc, rq->offset++);
|
|
error = copyout(&val, rq->buffer++, 1);
|
|
}
|
|
break;
|
|
#ifdef CFI_SUPPORT_STRATAFLASH
|
|
case CFIOCGFACTORYPR:
|
|
error = cfi_intel_get_factory_pr(sc, (uint64_t *)data);
|
|
break;
|
|
case CFIOCGOEMPR:
|
|
error = cfi_intel_get_oem_pr(sc, (uint64_t *)data);
|
|
break;
|
|
case CFIOCSOEMPR:
|
|
error = cfi_intel_set_oem_pr(sc, *(uint64_t *)data);
|
|
break;
|
|
case CFIOCGPLR:
|
|
error = cfi_intel_get_plr(sc, (uint32_t *)data);
|
|
break;
|
|
case CFIOCSPLR:
|
|
error = cfi_intel_set_plr(sc);
|
|
break;
|
|
#endif /* CFI_SUPPORT_STRATAFLASH */
|
|
default:
|
|
error = ENOIOCTL;
|
|
break;
|
|
}
|
|
return (error);
|
|
}
|