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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2010 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sys/types.h>
#include <sys/file.h>
#include <sys/errno.h>
#include <sys/open.h>
#include <sys/cred.h>
#include <sys/conf.h>
#include <sys/stat.h>
#include <sys/policy.h>
#include <sys/processor.h>
#include <sys/kmem.h>
#include <sys/modctl.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>
#include <sys/auxv.h>
#include <sys/ucode.h>
#include <sys/systeminfo.h>
#include <sys/x86_archext.h>
static dev_info_t *ucode_devi;
static uint32_t ucode_max_combined_size;
static kmutex_t ucode_update_lock;
/*ARGSUSED*/
static int
ucode_getinfo(dev_info_t *devi, ddi_info_cmd_t cmd, void *arg, void **result)
{
switch (cmd) {
case DDI_INFO_DEVT2DEVINFO:
case DDI_INFO_DEVT2INSTANCE:
break;
default:
return (DDI_FAILURE);
}
switch (getminor((dev_t)arg)) {
case UCODE_MINOR:
break;
default:
return (DDI_FAILURE);
}
if (cmd == DDI_INFO_DEVT2INSTANCE)
*result = 0;
else
*result = ucode_devi;
return (DDI_SUCCESS);
}
static int
ucode_attach(dev_info_t *devi, ddi_attach_cmd_t cmd)
{
ASSERT(cmd != DDI_RESUME);
switch (cmd) {
case DDI_RESUME:
return (DDI_SUCCESS);
case DDI_ATTACH:
ucode_devi = devi;
ucode_max_combined_size = UCODE_MAX_COMBINED_SIZE;
if (ddi_create_minor_node(devi, UCODE_NODE_NAME, S_IFCHR,
UCODE_MINOR, DDI_PSEUDO, 0) != DDI_SUCCESS) {
cmn_err(CE_WARN, "%s: Unable to create minor node",
UCODE_NODE_NAME);
return (DDI_FAILURE);
}
ddi_report_dev(devi);
return (DDI_SUCCESS);
default:
return (DDI_FAILURE);
}
}
static int
ucode_detach(dev_info_t *devi, ddi_detach_cmd_t cmd)
{
/*
* The power management and DR framework should never invoke this
* driver with DDI_SUSPEND because the ucode pseudo device does not
* have a reg property or hardware binding. However, we will return
* DDI_SUCCESS so that in the unlikely event that it does get
* called, the system will still suspend and resume.
*/
ASSERT(cmd != DDI_SUSPEND);
switch (cmd) {
case DDI_SUSPEND:
return (DDI_SUCCESS);
case DDI_DETACH:
ddi_remove_minor_node(devi, NULL);
ucode_devi = NULL;
return (DDI_SUCCESS);
default:
return (DDI_FAILURE);
}
}
/*ARGSUSED1*/
static int
ucode_open(dev_t *dev, int flag, int otyp, cred_t *cr)
{
return (getminor(*dev) == UCODE_MINOR ? 0 : ENXIO);
}
/*ARGSUSED*/
static int
ucode_ioctl(dev_t dev, int cmd, intptr_t arg, int mode, cred_t *cr, int *rval)
{
/*
* Make sure that the ucode ops pointer has been set up.
*/
if (!ucode)
return (EIO);
switch (cmd) {
case UCODE_GET_VERSION: {
int size;
uint32_t *revp, *rev_array;
size_t bufsz = NCPU * sizeof (*revp);
ucode_errno_t rc = EM_OK;
STRUCT_DECL(ucode_get_rev_struct, h);
STRUCT_INIT(h, mode);
if (ddi_copyin((void *)arg,
STRUCT_BUF(h), STRUCT_SIZE(h), mode))
return (EFAULT);
if ((size = STRUCT_FGET(h, ugv_size)) > NCPU || size < 0)
return (EINVAL);
if (size == 0)
return (0);
if ((rev_array = STRUCT_FGETP(h, ugv_rev)) == NULL)
return (EINVAL);
size *= sizeof (uint32_t);
/* Can't rely on caller for kernel's buffer size. */
revp = kmem_zalloc(bufsz, KM_SLEEP);
if (ddi_copyin((void *)rev_array, revp, size, mode) != 0) {
kmem_free(revp, bufsz);
return (EINVAL);
}
rc = ucode_get_rev(revp);
STRUCT_FSET(h, ugv_errno, rc);
if (ddi_copyout(revp, (void *)rev_array, size, mode) != 0) {
kmem_free(revp, bufsz);
return (EFAULT);
}
kmem_free(revp, bufsz);
if (ddi_copyout(STRUCT_BUF(h), (void *)arg,
STRUCT_SIZE(h), mode))
return (EFAULT);
return (0);
}
case UCODE_UPDATE: {
int size;
uint8_t *ucodep, *uw_ucode;
ucode_errno_t rc = EM_OK;
/*
* Requires all privilege.
*/
if (cr && secpolicy_ucode_update(cr))
return (EPERM);
STRUCT_DECL(ucode_write_struct, h);
STRUCT_INIT(h, mode);
if (ddi_copyin((void *)arg, STRUCT_BUF(h), STRUCT_SIZE(h),
mode))
return (EFAULT);
/*
* We allow the size of the combined microcode file to be up to
* ucode_max_combined_size. It is initialized to
* UCODE_MAX_COMBINED_SIZE, and can be patched if necessary.
*/
size = STRUCT_FGET(h, uw_size);
if (size > ucode_max_combined_size || size == 0)
return (EINVAL);
if ((uw_ucode = STRUCT_FGETP(h, uw_ucode)) == NULL)
return (EINVAL);
ucodep = kmem_zalloc(size, KM_SLEEP);
if (ddi_copyin((void *)uw_ucode, ucodep, size, mode) != 0) {
kmem_free(ucodep, size);
return (EFAULT);
}
if ((rc = ucode->validate(ucodep, size)) != EM_OK) {
kmem_free(ucodep, size);
STRUCT_FSET(h, uw_errno, rc);
if (ddi_copyout(STRUCT_BUF(h), (void *)arg,
STRUCT_SIZE(h), mode))
return (EFAULT);
return (0);
}
mutex_enter(&ucode_update_lock);
rc = ucode_update(ucodep, size);
mutex_exit(&ucode_update_lock);
kmem_free(ucodep, size);
STRUCT_FSET(h, uw_errno, rc);
if (ddi_copyout(STRUCT_BUF(h), (void *)arg,
STRUCT_SIZE(h), mode))
return (EFAULT);
/*
* Even if rc is not EM_OK, it is a successful operation
* from ioctl()'s perspective. We return the detailed error
* code via the ucode_write_struct data structure.
*/
return (0);
}
default:
return (ENOTTY);
}
}
static struct cb_ops ucode_cb_ops = {
ucode_open,
nulldev, /* close */
nodev, /* strategy */
nodev, /* print */
nodev, /* dump */
nodev, /* read */
nodev, /* write */
ucode_ioctl,
nodev, /* devmap */
nodev, /* mmap */
nodev, /* segmap */
nochpoll, /* poll */
ddi_prop_op,
NULL,
D_64BIT | D_NEW | D_MP
};
static struct dev_ops ucode_dv_ops = {
DEVO_REV,
0,
ucode_getinfo,
nulldev, /* identify */
nulldev, /* probe */
ucode_attach,
ucode_detach,
nodev, /* reset */
&ucode_cb_ops,
(struct bus_ops *)0,
NULL, /* power */
ddi_quiesce_not_needed, /* quiesce */
};
static struct modldrv modldrv = {
&mod_driverops,
"ucode driver",
&ucode_dv_ops
};
static struct modlinkage modl = {
MODREV_1,
&modldrv
};
int
_init(void)
{
int rc;
if ((rc = mod_install(&modl)) != 0)
return (rc);
mutex_init(&ucode_update_lock, NULL, MUTEX_DRIVER, NULL);
return (0);
}
int
_fini(void)
{
int rc;
if ((rc = mod_remove(&modl)) != 0)
return (rc);
mutex_destroy(&ucode_update_lock);
return (0);
}
int
_info(struct modinfo *modinfo)
{
return (mod_info(&modl, modinfo));
}
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