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/*-
* Copyright (c) 2013 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/memdesc.h>
#include <sys/module.h>
#include <sys/rman.h>
#include <sys/rwlock.h>
#include <sys/smp.h>
#include <sys/taskqueue.h>
#include <sys/tree.h>
#include <machine/bus.h>
#include <contrib/dev/acpica/include/acpi.h>
#include <contrib/dev/acpica/include/accommon.h>
#include <dev/acpica/acpivar.h>
#include <vm/vm.h>
#include <vm/vm_extern.h>
#include <vm/vm_kern.h>
#include <vm/vm_object.h>
#include <vm/vm_page.h>
#include <vm/vm_pager.h>
#include <vm/vm_map.h>
#include <x86/include/busdma_impl.h>
#include <x86/iommu/intel_reg.h>
#include <x86/iommu/busdma_dmar.h>
#include <x86/iommu/intel_dmar.h>
#include <dev/pci/pcivar.h>
typedef void (*dmar_quirk_fun)(struct dmar_unit *);
struct intel_dmar_quirk_cpu {
u_int ext_family;
u_int ext_model;
u_int family_code;
u_int model;
u_int stepping;
dmar_quirk_fun quirk;
const char *descr;
};
struct intel_dmar_quirk_nb {
u_int dev_id;
u_int rev_no;
dmar_quirk_fun quirk;
const char *descr;
};
static void
dmar_match_quirks(struct dmar_unit *dmar,
const struct intel_dmar_quirk_nb *nb_quirks, int nb_quirks_len,
const struct intel_dmar_quirk_cpu *cpu_quirks, int cpu_quirks_len)
{
device_t nb;
const struct intel_dmar_quirk_nb *nb_quirk;
const struct intel_dmar_quirk_cpu *cpu_quirk;
u_int p[4];
u_int dev_id, rev_no;
u_int ext_family, ext_model, family_code, model, stepping;
int i;
if (nb_quirks != NULL) {
nb = pci_find_bsf(0, 0, 0);
if (nb != NULL) {
dev_id = pci_get_device(nb);
rev_no = pci_get_revid(nb);
for (i = 0; i < nb_quirks_len; i++) {
nb_quirk = &nb_quirks[i];
if (nb_quirk->dev_id == dev_id &&
nb_quirk->rev_no == rev_no) {
if (bootverbose) {
device_printf(dmar->dev,
"NB IOMMU quirk %s\n",
nb_quirk->descr);
}
nb_quirk->quirk(dmar);
}
}
} else {
device_printf(dmar->dev, "cannot find northbridge\n");
}
}
if (cpu_quirks != NULL) {
do_cpuid(1, p);
ext_family = (p[0] & CPUID_EXT_FAMILY) >> 20;
ext_model = (p[0] & CPUID_EXT_MODEL) >> 16;
family_code = (p[0] & CPUID_FAMILY) >> 8;
model = (p[0] & CPUID_MODEL) >> 4;
stepping = p[0] & CPUID_STEPPING;
for (i = 0; i < cpu_quirks_len; i++) {
cpu_quirk = &cpu_quirks[i];
if (cpu_quirk->ext_family == ext_family &&
cpu_quirk->ext_model == ext_model &&
cpu_quirk->family_code == family_code &&
cpu_quirk->model == model &&
(cpu_quirk->stepping == -1 ||
cpu_quirk->stepping == stepping)) {
if (bootverbose) {
device_printf(dmar->dev,
"CPU IOMMU quirk %s\n",
cpu_quirk->descr);
}
cpu_quirk->quirk(dmar);
}
}
}
}
static void
nb_5400_no_low_high_prot_mem(struct dmar_unit *unit)
{
unit->hw_cap &= ~(DMAR_CAP_PHMR | DMAR_CAP_PLMR);
}
static const struct intel_dmar_quirk_nb pre_use_nb[] = {
{
.dev_id = 0x4001, .rev_no = 0x20,
.quirk = nb_5400_no_low_high_prot_mem,
.descr = "5400 E23" /* no low/high protected memory */
},
{
.dev_id = 0x4003, .rev_no = 0x20,
.quirk = nb_5400_no_low_high_prot_mem,
.descr = "5400 E23" /* no low/high protected memory */
},
};
static void
cpu_e5_am9(struct dmar_unit *unit)
{
unit->hw_cap &= ~(0x3fULL << 48);
unit->hw_cap |= (9ULL << 48);
}
static const struct intel_dmar_quirk_cpu post_ident_cpu[] = {
{
.ext_family = 0, .ext_model = 2, .family_code = 6, .model = 13,
.stepping = 6, .quirk = cpu_e5_am9,
.descr = "E5 BT176" /* AM should be at most 9 */
},
};
void
dmar_quirks_pre_use(struct dmar_unit *dmar)
{
if (!dmar_barrier_enter(dmar, DMAR_BARRIER_USEQ))
return;
DMAR_LOCK(dmar);
dmar_match_quirks(dmar, pre_use_nb, nitems(pre_use_nb),
NULL, 0);
dmar_barrier_exit(dmar, DMAR_BARRIER_USEQ);
}
void
dmar_quirks_post_ident(struct dmar_unit *dmar)
{
dmar_match_quirks(dmar, NULL, 0, post_ident_cpu,
nitems(post_ident_cpu));
}
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