| Current Path : /sys/amd64/compile/hs32/modules/usr/src/sys/modules/rc4/@/dev/cfi/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/amd64/compile/hs32/modules/usr/src/sys/modules/rc4/@/dev/cfi/cfi_dev.c |
/*-
* Copyright (c) 2007, Juniper Networks, 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.
* 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: release/9.1.0/sys/dev/cfi/cfi_dev.c 222198 2011-05-22 20:55:54Z attilio $");
#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).
*/
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(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_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);
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(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);
}