diff --git a/sys/compat/linuxkpi/common/src/linux_pci.c b/sys/compat/linuxkpi/common/src/linux_pci.c
index e4f85b906563..2db542284332 100644
--- a/sys/compat/linuxkpi/common/src/linux_pci.c
+++ b/sys/compat/linuxkpi/common/src/linux_pci.c
@@ -1,1576 +1,1576 @@
/*-
* Copyright (c) 2015-2016 Mellanox Technologies, Ltd.
* All rights reserved.
* Copyright (c) 2020-2022 The FreeBSD Foundation
*
* Portions of this software were developed by Björn Zeeb
* 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 unmodified, 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 ``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/bus.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/fcntl.h>
#include <sys/file.h>
#include <sys/filio.h>
#include <sys/pciio.h>
#include <sys/pctrie.h>
#include <sys/rwlock.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <machine/stdarg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pci_private.h>
#include <dev/pci/pci_iov.h>
#include <dev/backlight/backlight.h>
#include <linux/kernel.h>
#include <linux/kobject.h>
#include <linux/device.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/cdev.h>
#include <linux/file.h>
#include <linux/sysfs.h>
#include <linux/mm.h>
#include <linux/io.h>
#include <linux/vmalloc.h>
#include <linux/pci.h>
#include <linux/compat.h>
#include <linux/backlight.h>
#include "backlight_if.h"
#include "pcib_if.h"
/* Undef the linux function macro defined in linux/pci.h */
#undef pci_get_class
extern int linuxkpi_debug;
SYSCTL_DECL(_compat_linuxkpi);
static counter_u64_t lkpi_pci_nseg1_fail;
SYSCTL_COUNTER_U64(_compat_linuxkpi, OID_AUTO, lkpi_pci_nseg1_fail, CTLFLAG_RD,
&lkpi_pci_nseg1_fail, "Count of busdma mapping failures of single-segment");
static device_probe_t linux_pci_probe;
static device_attach_t linux_pci_attach;
static device_detach_t linux_pci_detach;
static device_suspend_t linux_pci_suspend;
static device_resume_t linux_pci_resume;
static device_shutdown_t linux_pci_shutdown;
static pci_iov_init_t linux_pci_iov_init;
static pci_iov_uninit_t linux_pci_iov_uninit;
static pci_iov_add_vf_t linux_pci_iov_add_vf;
static int linux_backlight_get_status(device_t dev, struct backlight_props *props);
static int linux_backlight_update_status(device_t dev, struct backlight_props *props);
static int linux_backlight_get_info(device_t dev, struct backlight_info *info);
static device_method_t pci_methods[] = {
DEVMETHOD(device_probe, linux_pci_probe),
DEVMETHOD(device_attach, linux_pci_attach),
DEVMETHOD(device_detach, linux_pci_detach),
DEVMETHOD(device_suspend, linux_pci_suspend),
DEVMETHOD(device_resume, linux_pci_resume),
DEVMETHOD(device_shutdown, linux_pci_shutdown),
DEVMETHOD(pci_iov_init, linux_pci_iov_init),
DEVMETHOD(pci_iov_uninit, linux_pci_iov_uninit),
DEVMETHOD(pci_iov_add_vf, linux_pci_iov_add_vf),
/* backlight interface */
DEVMETHOD(backlight_update_status, linux_backlight_update_status),
DEVMETHOD(backlight_get_status, linux_backlight_get_status),
DEVMETHOD(backlight_get_info, linux_backlight_get_info),
DEVMETHOD_END
};
struct linux_dma_priv {
uint64_t dma_mask;
bus_dma_tag_t dmat;
uint64_t dma_coherent_mask;
bus_dma_tag_t dmat_coherent;
struct mtx lock;
struct pctrie ptree;
};
#define DMA_PRIV_LOCK(priv) mtx_lock(&(priv)->lock)
#define DMA_PRIV_UNLOCK(priv) mtx_unlock(&(priv)->lock)
static bool
linux_is_drm(struct pci_driver *pdrv)
{
return (pdrv->name != NULL && strcmp(pdrv->name, "drmn") == 0);
}
static int
linux_pdev_dma_uninit(struct pci_dev *pdev)
{
struct linux_dma_priv *priv;
priv = pdev->dev.dma_priv;
if (priv->dmat)
bus_dma_tag_destroy(priv->dmat);
if (priv->dmat_coherent)
bus_dma_tag_destroy(priv->dmat_coherent);
mtx_destroy(&priv->lock);
pdev->dev.dma_priv = NULL;
free(priv, M_DEVBUF);
return (0);
}
static int
linux_pdev_dma_init(struct pci_dev *pdev)
{
struct linux_dma_priv *priv;
int error;
priv = malloc(sizeof(*priv), M_DEVBUF, M_WAITOK | M_ZERO);
mtx_init(&priv->lock, "lkpi-priv-dma", NULL, MTX_DEF);
pctrie_init(&priv->ptree);
pdev->dev.dma_priv = priv;
/* Create a default DMA tags. */
error = linux_dma_tag_init(&pdev->dev, DMA_BIT_MASK(64));
if (error != 0)
goto err;
/* Coherent is lower 32bit only by default in Linux. */
error = linux_dma_tag_init_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (error != 0)
goto err;
return (error);
err:
linux_pdev_dma_uninit(pdev);
return (error);
}
int
linux_dma_tag_init(struct device *dev, u64 dma_mask)
{
struct linux_dma_priv *priv;
int error;
priv = dev->dma_priv;
if (priv->dmat) {
if (priv->dma_mask == dma_mask)
return (0);
bus_dma_tag_destroy(priv->dmat);
}
priv->dma_mask = dma_mask;
error = bus_dma_tag_create(bus_get_dma_tag(dev->bsddev),
1, 0, /* alignment, boundary */
dma_mask, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filtfunc, filtfuncarg */
BUS_SPACE_MAXSIZE, /* maxsize */
1, /* nsegments */
BUS_SPACE_MAXSIZE, /* maxsegsz */
0, /* flags */
NULL, NULL, /* lockfunc, lockfuncarg */
&priv->dmat);
return (-error);
}
int
linux_dma_tag_init_coherent(struct device *dev, u64 dma_mask)
{
struct linux_dma_priv *priv;
int error;
priv = dev->dma_priv;
if (priv->dmat_coherent) {
if (priv->dma_coherent_mask == dma_mask)
return (0);
bus_dma_tag_destroy(priv->dmat_coherent);
}
priv->dma_coherent_mask = dma_mask;
error = bus_dma_tag_create(bus_get_dma_tag(dev->bsddev),
1, 0, /* alignment, boundary */
dma_mask, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filtfunc, filtfuncarg */
BUS_SPACE_MAXSIZE, /* maxsize */
1, /* nsegments */
BUS_SPACE_MAXSIZE, /* maxsegsz */
0, /* flags */
NULL, NULL, /* lockfunc, lockfuncarg */
&priv->dmat_coherent);
return (-error);
}
static struct pci_driver *
linux_pci_find(device_t dev, const struct pci_device_id **idp)
{
const struct pci_device_id *id;
struct pci_driver *pdrv;
uint16_t vendor;
uint16_t device;
uint16_t subvendor;
uint16_t subdevice;
vendor = pci_get_vendor(dev);
device = pci_get_device(dev);
subvendor = pci_get_subvendor(dev);
subdevice = pci_get_subdevice(dev);
spin_lock(&pci_lock);
list_for_each_entry(pdrv, &pci_drivers, node) {
for (id = pdrv->id_table; id->vendor != 0; id++) {
if (vendor == id->vendor &&
(PCI_ANY_ID == id->device || device == id->device) &&
(PCI_ANY_ID == id->subvendor || subvendor == id->subvendor) &&
(PCI_ANY_ID == id->subdevice || subdevice == id->subdevice)) {
*idp = id;
spin_unlock(&pci_lock);
return (pdrv);
}
}
}
spin_unlock(&pci_lock);
return (NULL);
}
struct pci_dev *
lkpi_pci_get_device(uint16_t vendor, uint16_t device, struct pci_dev *odev)
{
struct pci_dev *pdev;
KASSERT(odev == NULL, ("%s: odev argument not yet supported\n", __func__));
spin_lock(&pci_lock);
list_for_each_entry(pdev, &pci_devices, links) {
if (pdev->vendor == vendor && pdev->device == device)
break;
}
spin_unlock(&pci_lock);
return (pdev);
}
static void
lkpi_pci_dev_release(struct device *dev)
{
lkpi_devres_release_free_list(dev);
spin_lock_destroy(&dev->devres_lock);
}
static void
lkpifill_pci_dev(device_t dev, struct pci_dev *pdev)
{
pdev->devfn = PCI_DEVFN(pci_get_slot(dev), pci_get_function(dev));
pdev->vendor = pci_get_vendor(dev);
pdev->device = pci_get_device(dev);
pdev->subsystem_vendor = pci_get_subvendor(dev);
pdev->subsystem_device = pci_get_subdevice(dev);
pdev->class = pci_get_class(dev);
pdev->revision = pci_get_revid(dev);
pdev->bus = malloc(sizeof(*pdev->bus), M_DEVBUF, M_WAITOK | M_ZERO);
/*
* This should be the upstream bridge; pci_upstream_bridge()
* handles that case on demand as otherwise we'll shadow the
* entire PCI hierarchy.
*/
pdev->bus->self = pdev;
pdev->bus->number = pci_get_bus(dev);
pdev->bus->domain = pci_get_domain(dev);
pdev->dev.bsddev = dev;
pdev->dev.parent = &linux_root_device;
pdev->dev.release = lkpi_pci_dev_release;
INIT_LIST_HEAD(&pdev->dev.irqents);
kobject_init(&pdev->dev.kobj, &linux_dev_ktype);
kobject_set_name(&pdev->dev.kobj, device_get_nameunit(dev));
kobject_add(&pdev->dev.kobj, &linux_root_device.kobj,
kobject_name(&pdev->dev.kobj));
spin_lock_init(&pdev->dev.devres_lock);
INIT_LIST_HEAD(&pdev->dev.devres_head);
}
static void
lkpinew_pci_dev_release(struct device *dev)
{
struct pci_dev *pdev;
pdev = to_pci_dev(dev);
if (pdev->root != NULL)
pci_dev_put(pdev->root);
if (pdev->bus->self != pdev)
pci_dev_put(pdev->bus->self);
free(pdev->bus, M_DEVBUF);
free(pdev, M_DEVBUF);
}
struct pci_dev *
lkpinew_pci_dev(device_t dev)
{
struct pci_dev *pdev;
pdev = malloc(sizeof(*pdev), M_DEVBUF, M_WAITOK|M_ZERO);
lkpifill_pci_dev(dev, pdev);
pdev->dev.release = lkpinew_pci_dev_release;
return (pdev);
}
struct pci_dev *
lkpi_pci_get_class(unsigned int class, struct pci_dev *from)
{
device_t dev;
device_t devfrom = NULL;
struct pci_dev *pdev;
if (from != NULL)
devfrom = from->dev.bsddev;
dev = pci_find_class_from(class >> 16, (class >> 8) & 0xFF, devfrom);
if (dev == NULL)
return (NULL);
pdev = lkpinew_pci_dev(dev);
return (pdev);
}
struct pci_dev *
lkpi_pci_get_domain_bus_and_slot(int domain, unsigned int bus,
unsigned int devfn)
{
device_t dev;
struct pci_dev *pdev;
dev = pci_find_dbsf(domain, bus, PCI_SLOT(devfn), PCI_FUNC(devfn));
if (dev == NULL)
return (NULL);
pdev = lkpinew_pci_dev(dev);
return (pdev);
}
static int
linux_pci_probe(device_t dev)
{
const struct pci_device_id *id;
struct pci_driver *pdrv;
if ((pdrv = linux_pci_find(dev, &id)) == NULL)
return (ENXIO);
if (device_get_driver(dev) != &pdrv->bsddriver)
return (ENXIO);
device_set_desc(dev, pdrv->name);
/* Assume BSS initialized (should never return BUS_PROBE_SPECIFIC). */
if (pdrv->bsd_probe_return == 0)
return (BUS_PROBE_DEFAULT);
else
return (pdrv->bsd_probe_return);
}
static int
linux_pci_attach(device_t dev)
{
const struct pci_device_id *id;
struct pci_driver *pdrv;
struct pci_dev *pdev;
pdrv = linux_pci_find(dev, &id);
pdev = device_get_softc(dev);
MPASS(pdrv != NULL);
MPASS(pdev != NULL);
return (linux_pci_attach_device(dev, pdrv, id, pdev));
}
int
linux_pci_attach_device(device_t dev, struct pci_driver *pdrv,
const struct pci_device_id *id, struct pci_dev *pdev)
{
struct resource_list_entry *rle;
device_t parent;
uintptr_t rid;
int error;
bool isdrm;
linux_set_current(curthread);
parent = device_get_parent(dev);
isdrm = pdrv != NULL && linux_is_drm(pdrv);
if (isdrm) {
struct pci_devinfo *dinfo;
dinfo = device_get_ivars(parent);
device_set_ivars(dev, dinfo);
}
lkpifill_pci_dev(dev, pdev);
if (isdrm)
PCI_GET_ID(device_get_parent(parent), parent, PCI_ID_RID, &rid);
else
PCI_GET_ID(parent, dev, PCI_ID_RID, &rid);
pdev->devfn = rid;
pdev->pdrv = pdrv;
rle = linux_pci_get_rle(pdev, SYS_RES_IRQ, 0, false);
if (rle != NULL)
pdev->dev.irq = rle->start;
else
pdev->dev.irq = LINUX_IRQ_INVALID;
pdev->irq = pdev->dev.irq;
error = linux_pdev_dma_init(pdev);
if (error)
goto out_dma_init;
TAILQ_INIT(&pdev->mmio);
spin_lock(&pci_lock);
list_add(&pdev->links, &pci_devices);
spin_unlock(&pci_lock);
if (pdrv != NULL) {
error = pdrv->probe(pdev, id);
if (error)
goto out_probe;
}
return (0);
out_probe:
free(pdev->bus, M_DEVBUF);
linux_pdev_dma_uninit(pdev);
out_dma_init:
spin_lock(&pci_lock);
list_del(&pdev->links);
spin_unlock(&pci_lock);
put_device(&pdev->dev);
return (-error);
}
static int
linux_pci_detach(device_t dev)
{
struct pci_dev *pdev;
pdev = device_get_softc(dev);
MPASS(pdev != NULL);
device_set_desc(dev, NULL);
return (linux_pci_detach_device(pdev));
}
int
linux_pci_detach_device(struct pci_dev *pdev)
{
linux_set_current(curthread);
if (pdev->pdrv != NULL)
pdev->pdrv->remove(pdev);
if (pdev->root != NULL)
pci_dev_put(pdev->root);
free(pdev->bus, M_DEVBUF);
linux_pdev_dma_uninit(pdev);
spin_lock(&pci_lock);
list_del(&pdev->links);
spin_unlock(&pci_lock);
put_device(&pdev->dev);
return (0);
}
static int
lkpi_pci_disable_dev(struct device *dev)
{
(void) pci_disable_io(dev->bsddev, SYS_RES_MEMORY);
(void) pci_disable_io(dev->bsddev, SYS_RES_IOPORT);
return (0);
}
struct pci_devres *
lkpi_pci_devres_get_alloc(struct pci_dev *pdev)
{
struct pci_devres *dr;
dr = lkpi_devres_find(&pdev->dev, lkpi_pci_devres_release, NULL, NULL);
if (dr == NULL) {
dr = lkpi_devres_alloc(lkpi_pci_devres_release, sizeof(*dr),
GFP_KERNEL | __GFP_ZERO);
if (dr != NULL)
lkpi_devres_add(&pdev->dev, dr);
}
return (dr);
}
void
lkpi_pci_devres_release(struct device *dev, void *p)
{
struct pci_devres *dr;
struct pci_dev *pdev;
int bar;
pdev = to_pci_dev(dev);
dr = p;
if (pdev->msix_enabled)
lkpi_pci_disable_msix(pdev);
if (pdev->msi_enabled)
lkpi_pci_disable_msi(pdev);
if (dr->enable_io && lkpi_pci_disable_dev(dev) == 0)
dr->enable_io = false;
if (dr->region_mask == 0)
return;
for (bar = PCIR_MAX_BAR_0; bar >= 0; bar--) {
if ((dr->region_mask & (1 << bar)) == 0)
continue;
pci_release_region(pdev, bar);
}
}
struct pcim_iomap_devres *
lkpi_pcim_iomap_devres_find(struct pci_dev *pdev)
{
struct pcim_iomap_devres *dr;
dr = lkpi_devres_find(&pdev->dev, lkpi_pcim_iomap_table_release,
NULL, NULL);
if (dr == NULL) {
dr = lkpi_devres_alloc(lkpi_pcim_iomap_table_release,
sizeof(*dr), GFP_KERNEL | __GFP_ZERO);
if (dr != NULL)
lkpi_devres_add(&pdev->dev, dr);
}
if (dr == NULL)
device_printf(pdev->dev.bsddev, "%s: NULL\n", __func__);
return (dr);
}
void
lkpi_pcim_iomap_table_release(struct device *dev, void *p)
{
struct pcim_iomap_devres *dr;
struct pci_dev *pdev;
int bar;
dr = p;
pdev = to_pci_dev(dev);
for (bar = PCIR_MAX_BAR_0; bar >= 0; bar--) {
if (dr->mmio_table[bar] == NULL)
continue;
pci_iounmap(pdev, dr->mmio_table[bar]);
}
}
static int
linux_pci_suspend(device_t dev)
{
const struct dev_pm_ops *pmops;
struct pm_message pm = { };
struct pci_dev *pdev;
int error;
error = 0;
linux_set_current(curthread);
pdev = device_get_softc(dev);
pmops = pdev->pdrv->driver.pm;
if (pdev->pdrv->suspend != NULL)
error = -pdev->pdrv->suspend(pdev, pm);
else if (pmops != NULL && pmops->suspend != NULL) {
error = -pmops->suspend(&pdev->dev);
if (error == 0 && pmops->suspend_late != NULL)
error = -pmops->suspend_late(&pdev->dev);
}
return (error);
}
static int
linux_pci_resume(device_t dev)
{
const struct dev_pm_ops *pmops;
struct pci_dev *pdev;
int error;
error = 0;
linux_set_current(curthread);
pdev = device_get_softc(dev);
pmops = pdev->pdrv->driver.pm;
if (pdev->pdrv->resume != NULL)
error = -pdev->pdrv->resume(pdev);
else if (pmops != NULL && pmops->resume != NULL) {
if (pmops->resume_early != NULL)
error = -pmops->resume_early(&pdev->dev);
if (error == 0 && pmops->resume != NULL)
error = -pmops->resume(&pdev->dev);
}
return (error);
}
static int
linux_pci_shutdown(device_t dev)
{
struct pci_dev *pdev;
linux_set_current(curthread);
pdev = device_get_softc(dev);
if (pdev->pdrv->shutdown != NULL)
pdev->pdrv->shutdown(pdev);
return (0);
}
static int
linux_pci_iov_init(device_t dev, uint16_t num_vfs, const nvlist_t *pf_config)
{
struct pci_dev *pdev;
int error;
linux_set_current(curthread);
pdev = device_get_softc(dev);
if (pdev->pdrv->bsd_iov_init != NULL)
error = pdev->pdrv->bsd_iov_init(dev, num_vfs, pf_config);
else
error = EINVAL;
return (error);
}
static void
linux_pci_iov_uninit(device_t dev)
{
struct pci_dev *pdev;
linux_set_current(curthread);
pdev = device_get_softc(dev);
if (pdev->pdrv->bsd_iov_uninit != NULL)
pdev->pdrv->bsd_iov_uninit(dev);
}
static int
linux_pci_iov_add_vf(device_t dev, uint16_t vfnum, const nvlist_t *vf_config)
{
struct pci_dev *pdev;
int error;
linux_set_current(curthread);
pdev = device_get_softc(dev);
if (pdev->pdrv->bsd_iov_add_vf != NULL)
error = pdev->pdrv->bsd_iov_add_vf(dev, vfnum, vf_config);
else
error = EINVAL;
return (error);
}
static int
_linux_pci_register_driver(struct pci_driver *pdrv, devclass_t dc)
{
int error;
linux_set_current(curthread);
spin_lock(&pci_lock);
list_add(&pdrv->node, &pci_drivers);
spin_unlock(&pci_lock);
if (pdrv->bsddriver.name == NULL)
pdrv->bsddriver.name = pdrv->name;
pdrv->bsddriver.methods = pci_methods;
pdrv->bsddriver.size = sizeof(struct pci_dev);
bus_topo_lock();
error = devclass_add_driver(dc, &pdrv->bsddriver,
BUS_PASS_DEFAULT, &pdrv->bsdclass);
bus_topo_unlock();
return (-error);
}
int
linux_pci_register_driver(struct pci_driver *pdrv)
{
devclass_t dc;
dc = devclass_find("pci");
if (dc == NULL)
return (-ENXIO);
return (_linux_pci_register_driver(pdrv, dc));
}
struct resource_list_entry *
linux_pci_reserve_bar(struct pci_dev *pdev, struct resource_list *rl,
int type, int rid)
{
device_t dev;
struct resource *res;
KASSERT(type == SYS_RES_IOPORT || type == SYS_RES_MEMORY,
("trying to reserve non-BAR type %d", type));
dev = pdev->pdrv != NULL && linux_is_drm(pdev->pdrv) ?
device_get_parent(pdev->dev.bsddev) : pdev->dev.bsddev;
res = pci_reserve_map(device_get_parent(dev), dev, type, &rid, 0, ~0,
1, 1, 0);
if (res == NULL)
return (NULL);
return (resource_list_find(rl, type, rid));
}
unsigned long
pci_resource_start(struct pci_dev *pdev, int bar)
{
struct resource_list_entry *rle;
rman_res_t newstart;
device_t dev;
if ((rle = linux_pci_get_bar(pdev, bar, true)) == NULL)
return (0);
dev = pdev->pdrv != NULL && linux_is_drm(pdev->pdrv) ?
device_get_parent(pdev->dev.bsddev) : pdev->dev.bsddev;
if (BUS_TRANSLATE_RESOURCE(dev, rle->type, rle->start, &newstart)) {
device_printf(pdev->dev.bsddev, "translate of %#jx failed\n",
(uintmax_t)rle->start);
return (0);
}
return (newstart);
}
unsigned long
pci_resource_len(struct pci_dev *pdev, int bar)
{
struct resource_list_entry *rle;
if ((rle = linux_pci_get_bar(pdev, bar, true)) == NULL)
return (0);
return (rle->count);
}
int
pci_request_region(struct pci_dev *pdev, int bar, const char *res_name)
{
struct resource *res;
struct pci_devres *dr;
struct pci_mmio_region *mmio;
int rid;
int type;
type = pci_resource_type(pdev, bar);
if (type < 0)
return (-ENODEV);
rid = PCIR_BAR(bar);
res = bus_alloc_resource_any(pdev->dev.bsddev, type, &rid,
RF_ACTIVE|RF_SHAREABLE);
if (res == NULL) {
device_printf(pdev->dev.bsddev, "%s: failed to alloc "
"bar %d type %d rid %d\n",
__func__, bar, type, PCIR_BAR(bar));
return (-ENODEV);
}
/*
* It seems there is an implicit devres tracking on these if the device
* is managed; otherwise the resources are not automatiaclly freed on
* FreeBSD/LinuxKPI tough they should be/are expected to be by Linux
* drivers.
*/
dr = lkpi_pci_devres_find(pdev);
if (dr != NULL) {
dr->region_mask |= (1 << bar);
dr->region_table[bar] = res;
}
/* Even if the device is not managed we need to track it for iomap. */
mmio = malloc(sizeof(*mmio), M_DEVBUF, M_WAITOK | M_ZERO);
mmio->rid = PCIR_BAR(bar);
mmio->type = type;
mmio->res = res;
TAILQ_INSERT_TAIL(&pdev->mmio, mmio, next);
return (0);
}
struct resource *
_lkpi_pci_iomap(struct pci_dev *pdev, int bar, int mmio_size __unused)
{
struct pci_mmio_region *mmio, *p;
int type;
type = pci_resource_type(pdev, bar);
if (type < 0) {
device_printf(pdev->dev.bsddev, "%s: bar %d type %d\n",
__func__, bar, type);
return (NULL);
}
/*
* Check for duplicate mappings.
* This can happen if a driver calls pci_request_region() first.
*/
TAILQ_FOREACH_SAFE(mmio, &pdev->mmio, next, p) {
if (mmio->type == type && mmio->rid == PCIR_BAR(bar)) {
return (mmio->res);
}
}
mmio = malloc(sizeof(*mmio), M_DEVBUF, M_WAITOK | M_ZERO);
mmio->rid = PCIR_BAR(bar);
mmio->type = type;
mmio->res = bus_alloc_resource_any(pdev->dev.bsddev, mmio->type,
&mmio->rid, RF_ACTIVE|RF_SHAREABLE);
if (mmio->res == NULL) {
device_printf(pdev->dev.bsddev, "%s: failed to alloc "
"bar %d type %d rid %d\n",
__func__, bar, type, PCIR_BAR(bar));
free(mmio, M_DEVBUF);
return (NULL);
}
TAILQ_INSERT_TAIL(&pdev->mmio, mmio, next);
return (mmio->res);
}
int
linux_pci_register_drm_driver(struct pci_driver *pdrv)
{
devclass_t dc;
dc = devclass_create("vgapci");
if (dc == NULL)
return (-ENXIO);
pdrv->name = "drmn";
return (_linux_pci_register_driver(pdrv, dc));
}
void
linux_pci_unregister_driver(struct pci_driver *pdrv)
{
devclass_t bus;
bus = devclass_find("pci");
spin_lock(&pci_lock);
list_del(&pdrv->node);
spin_unlock(&pci_lock);
bus_topo_lock();
if (bus != NULL)
devclass_delete_driver(bus, &pdrv->bsddriver);
bus_topo_unlock();
}
void
linux_pci_unregister_drm_driver(struct pci_driver *pdrv)
{
devclass_t bus;
bus = devclass_find("vgapci");
spin_lock(&pci_lock);
list_del(&pdrv->node);
spin_unlock(&pci_lock);
bus_topo_lock();
if (bus != NULL)
devclass_delete_driver(bus, &pdrv->bsddriver);
bus_topo_unlock();
}
int
pci_alloc_irq_vectors(struct pci_dev *pdev, int minv, int maxv,
unsigned int flags)
{
int error;
if (flags & PCI_IRQ_MSIX) {
struct msix_entry *entries;
int i;
entries = kcalloc(maxv, sizeof(*entries), GFP_KERNEL);
if (entries == NULL) {
error = -ENOMEM;
goto out;
}
for (i = 0; i < maxv; ++i)
entries[i].entry = i;
error = pci_enable_msix(pdev, entries, maxv);
out:
kfree(entries);
if (error == 0 && pdev->msix_enabled)
return (pdev->dev.irq_end - pdev->dev.irq_start);
}
if (flags & PCI_IRQ_MSI) {
if (pci_msi_count(pdev->dev.bsddev) < minv)
return (-ENOSPC);
/* We only support 1 vector in pci_enable_msi() */
if (minv != 1)
return (-ENOSPC);
error = pci_enable_msi(pdev);
if (error == 0 && pdev->msi_enabled)
return (pdev->dev.irq_end - pdev->dev.irq_start);
}
if (flags & PCI_IRQ_LEGACY) {
if (pdev->irq)
return (1);
}
return (-EINVAL);
}
bool
pci_device_is_present(struct pci_dev *pdev)
{
device_t dev;
dev = pdev->dev.bsddev;
return (bus_child_present(dev));
}
CTASSERT(sizeof(dma_addr_t) <= sizeof(uint64_t));
struct linux_dma_obj {
void *vaddr;
uint64_t dma_addr;
bus_dmamap_t dmamap;
bus_dma_tag_t dmat;
};
static uma_zone_t linux_dma_trie_zone;
static uma_zone_t linux_dma_obj_zone;
static void
linux_dma_init(void *arg)
{
linux_dma_trie_zone = uma_zcreate("linux_dma_pctrie",
pctrie_node_size(), NULL, NULL, pctrie_zone_init, NULL,
UMA_ALIGN_PTR, 0);
linux_dma_obj_zone = uma_zcreate("linux_dma_object",
sizeof(struct linux_dma_obj), NULL, NULL, NULL, NULL,
UMA_ALIGN_PTR, 0);
lkpi_pci_nseg1_fail = counter_u64_alloc(M_WAITOK);
}
SYSINIT(linux_dma, SI_SUB_DRIVERS, SI_ORDER_THIRD, linux_dma_init, NULL);
static void
linux_dma_uninit(void *arg)
{
counter_u64_free(lkpi_pci_nseg1_fail);
uma_zdestroy(linux_dma_obj_zone);
uma_zdestroy(linux_dma_trie_zone);
}
SYSUNINIT(linux_dma, SI_SUB_DRIVERS, SI_ORDER_THIRD, linux_dma_uninit, NULL);
static void *
linux_dma_trie_alloc(struct pctrie *ptree)
{
return (uma_zalloc(linux_dma_trie_zone, M_NOWAIT));
}
static void
linux_dma_trie_free(struct pctrie *ptree, void *node)
{
uma_zfree(linux_dma_trie_zone, node);
}
PCTRIE_DEFINE(LINUX_DMA, linux_dma_obj, dma_addr, linux_dma_trie_alloc,
linux_dma_trie_free);
#if defined(__i386__) || defined(__amd64__) || defined(__aarch64__)
static dma_addr_t
linux_dma_map_phys_common(struct device *dev, vm_paddr_t phys, size_t len,
bus_dma_tag_t dmat)
{
struct linux_dma_priv *priv;
struct linux_dma_obj *obj;
int error, nseg;
bus_dma_segment_t seg;
priv = dev->dma_priv;
/*
* If the resultant mapping will be entirely 1:1 with the
* physical address, short-circuit the remainder of the
* bus_dma API. This avoids tracking collisions in the pctrie
* with the additional benefit of reducing overhead.
*/
if (bus_dma_id_mapped(dmat, phys, len))
return (phys);
obj = uma_zalloc(linux_dma_obj_zone, M_NOWAIT);
if (obj == NULL) {
return (0);
}
obj->dmat = dmat;
DMA_PRIV_LOCK(priv);
if (bus_dmamap_create(obj->dmat, 0, &obj->dmamap) != 0) {
DMA_PRIV_UNLOCK(priv);
uma_zfree(linux_dma_obj_zone, obj);
return (0);
}
nseg = -1;
if (_bus_dmamap_load_phys(obj->dmat, obj->dmamap, phys, len,
BUS_DMA_NOWAIT, &seg, &nseg) != 0) {
bus_dmamap_destroy(obj->dmat, obj->dmamap);
DMA_PRIV_UNLOCK(priv);
uma_zfree(linux_dma_obj_zone, obj);
counter_u64_add(lkpi_pci_nseg1_fail, 1);
if (linuxkpi_debug)
dump_stack();
return (0);
}
KASSERT(++nseg == 1, ("More than one segment (nseg=%d)", nseg));
obj->dma_addr = seg.ds_addr;
error = LINUX_DMA_PCTRIE_INSERT(&priv->ptree, obj);
if (error != 0) {
bus_dmamap_unload(obj->dmat, obj->dmamap);
bus_dmamap_destroy(obj->dmat, obj->dmamap);
DMA_PRIV_UNLOCK(priv);
uma_zfree(linux_dma_obj_zone, obj);
return (0);
}
DMA_PRIV_UNLOCK(priv);
return (obj->dma_addr);
}
#else
static dma_addr_t
linux_dma_map_phys_common(struct device *dev __unused, vm_paddr_t phys,
size_t len __unused, bus_dma_tag_t dmat __unused)
{
return (phys);
}
#endif
dma_addr_t
linux_dma_map_phys(struct device *dev, vm_paddr_t phys, size_t len)
{
struct linux_dma_priv *priv;
priv = dev->dma_priv;
return (linux_dma_map_phys_common(dev, phys, len, priv->dmat));
}
#if defined(__i386__) || defined(__amd64__) || defined(__aarch64__)
void
linux_dma_unmap(struct device *dev, dma_addr_t dma_addr, size_t len)
{
struct linux_dma_priv *priv;
struct linux_dma_obj *obj;
priv = dev->dma_priv;
if (pctrie_is_empty(&priv->ptree))
return;
DMA_PRIV_LOCK(priv);
obj = LINUX_DMA_PCTRIE_LOOKUP(&priv->ptree, dma_addr);
if (obj == NULL) {
DMA_PRIV_UNLOCK(priv);
return;
}
LINUX_DMA_PCTRIE_REMOVE(&priv->ptree, dma_addr);
bus_dmamap_unload(obj->dmat, obj->dmamap);
bus_dmamap_destroy(obj->dmat, obj->dmamap);
DMA_PRIV_UNLOCK(priv);
uma_zfree(linux_dma_obj_zone, obj);
}
#else
void
linux_dma_unmap(struct device *dev, dma_addr_t dma_addr, size_t len)
{
}
#endif
void *
linux_dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t flag)
{
struct linux_dma_priv *priv;
vm_paddr_t high;
size_t align;
void *mem;
if (dev == NULL || dev->dma_priv == NULL) {
*dma_handle = 0;
return (NULL);
}
priv = dev->dma_priv;
if (priv->dma_coherent_mask)
high = priv->dma_coherent_mask;
else
/* Coherent is lower 32bit only by default in Linux. */
high = BUS_SPACE_MAXADDR_32BIT;
align = PAGE_SIZE << get_order(size);
/* Always zero the allocation. */
flag |= M_ZERO;
mem = (void *)kmem_alloc_contig(size, flag & GFP_NATIVE_MASK, 0, high,
align, 0, VM_MEMATTR_DEFAULT);
if (mem != NULL) {
*dma_handle = linux_dma_map_phys_common(dev, vtophys(mem), size,
priv->dmat_coherent);
if (*dma_handle == 0) {
kmem_free((vm_offset_t)mem, size);
mem = NULL;
}
} else {
*dma_handle = 0;
}
return (mem);
}
struct lkpi_devres_dmam_coherent {
size_t size;
dma_addr_t *handle;
void *mem;
};
static void
lkpi_dmam_free_coherent(struct device *dev, void *p)
{
struct lkpi_devres_dmam_coherent *dr;
dr = p;
dma_free_coherent(dev, dr->size, dr->mem, *dr->handle);
}
void *
linuxkpi_dmam_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
gfp_t flag)
{
struct lkpi_devres_dmam_coherent *dr;
dr = lkpi_devres_alloc(lkpi_dmam_free_coherent,
- sizeof(*dr), GFP_KERNEL | __GFP_ZERO);
+ sizeof(*dr), GFP_KERNEL | __GFP_ZERO);
if (dr == NULL)
return (NULL);
dr->size = size;
dr->mem = linux_dma_alloc_coherent(dev, size, dma_handle, flag);
dr->handle = dma_handle;
if (dr->mem == NULL) {
lkpi_devres_free(dr);
return (NULL);
}
lkpi_devres_add(dev, dr);
return (dr->mem);
}
void
linuxkpi_dma_sync(struct device *dev, dma_addr_t dma_addr, size_t size,
bus_dmasync_op_t op)
{
struct linux_dma_priv *priv;
struct linux_dma_obj *obj;
priv = dev->dma_priv;
if (pctrie_is_empty(&priv->ptree))
return;
DMA_PRIV_LOCK(priv);
obj = LINUX_DMA_PCTRIE_LOOKUP(&priv->ptree, dma_addr);
if (obj == NULL) {
DMA_PRIV_UNLOCK(priv);
return;
}
bus_dmamap_sync(obj->dmat, obj->dmamap, op);
DMA_PRIV_UNLOCK(priv);
}
int
linux_dma_map_sg_attrs(struct device *dev, struct scatterlist *sgl, int nents,
enum dma_data_direction direction, unsigned long attrs __unused)
{
struct linux_dma_priv *priv;
struct scatterlist *sg;
int i, nseg;
bus_dma_segment_t seg;
priv = dev->dma_priv;
DMA_PRIV_LOCK(priv);
/* create common DMA map in the first S/G entry */
if (bus_dmamap_create(priv->dmat, 0, &sgl->dma_map) != 0) {
DMA_PRIV_UNLOCK(priv);
return (0);
}
/* load all S/G list entries */
for_each_sg(sgl, sg, nents, i) {
nseg = -1;
if (_bus_dmamap_load_phys(priv->dmat, sgl->dma_map,
sg_phys(sg), sg->length, BUS_DMA_NOWAIT,
&seg, &nseg) != 0) {
bus_dmamap_unload(priv->dmat, sgl->dma_map);
bus_dmamap_destroy(priv->dmat, sgl->dma_map);
DMA_PRIV_UNLOCK(priv);
return (0);
}
KASSERT(nseg == 0,
("More than one segment (nseg=%d)", nseg + 1));
sg_dma_address(sg) = seg.ds_addr;
}
switch (direction) {
case DMA_BIDIRECTIONAL:
bus_dmamap_sync(priv->dmat, sgl->dma_map, BUS_DMASYNC_PREWRITE);
break;
case DMA_TO_DEVICE:
bus_dmamap_sync(priv->dmat, sgl->dma_map, BUS_DMASYNC_PREREAD);
break;
case DMA_FROM_DEVICE:
bus_dmamap_sync(priv->dmat, sgl->dma_map, BUS_DMASYNC_PREWRITE);
break;
default:
break;
}
DMA_PRIV_UNLOCK(priv);
return (nents);
}
void
linux_dma_unmap_sg_attrs(struct device *dev, struct scatterlist *sgl,
int nents __unused, enum dma_data_direction direction,
unsigned long attrs __unused)
{
struct linux_dma_priv *priv;
priv = dev->dma_priv;
DMA_PRIV_LOCK(priv);
switch (direction) {
case DMA_BIDIRECTIONAL:
bus_dmamap_sync(priv->dmat, sgl->dma_map, BUS_DMASYNC_POSTREAD);
bus_dmamap_sync(priv->dmat, sgl->dma_map, BUS_DMASYNC_PREREAD);
break;
case DMA_TO_DEVICE:
bus_dmamap_sync(priv->dmat, sgl->dma_map, BUS_DMASYNC_POSTWRITE);
break;
case DMA_FROM_DEVICE:
bus_dmamap_sync(priv->dmat, sgl->dma_map, BUS_DMASYNC_POSTREAD);
break;
default:
break;
}
bus_dmamap_unload(priv->dmat, sgl->dma_map);
bus_dmamap_destroy(priv->dmat, sgl->dma_map);
DMA_PRIV_UNLOCK(priv);
}
struct dma_pool {
struct device *pool_device;
uma_zone_t pool_zone;
struct mtx pool_lock;
bus_dma_tag_t pool_dmat;
size_t pool_entry_size;
struct pctrie pool_ptree;
};
#define DMA_POOL_LOCK(pool) mtx_lock(&(pool)->pool_lock)
#define DMA_POOL_UNLOCK(pool) mtx_unlock(&(pool)->pool_lock)
static inline int
dma_pool_obj_ctor(void *mem, int size, void *arg, int flags)
{
struct linux_dma_obj *obj = mem;
struct dma_pool *pool = arg;
int error, nseg;
bus_dma_segment_t seg;
nseg = -1;
DMA_POOL_LOCK(pool);
error = _bus_dmamap_load_phys(pool->pool_dmat, obj->dmamap,
vtophys(obj->vaddr), pool->pool_entry_size, BUS_DMA_NOWAIT,
&seg, &nseg);
DMA_POOL_UNLOCK(pool);
if (error != 0) {
return (error);
}
KASSERT(++nseg == 1, ("More than one segment (nseg=%d)", nseg));
obj->dma_addr = seg.ds_addr;
return (0);
}
static void
dma_pool_obj_dtor(void *mem, int size, void *arg)
{
struct linux_dma_obj *obj = mem;
struct dma_pool *pool = arg;
DMA_POOL_LOCK(pool);
bus_dmamap_unload(pool->pool_dmat, obj->dmamap);
DMA_POOL_UNLOCK(pool);
}
static int
dma_pool_obj_import(void *arg, void **store, int count, int domain __unused,
int flags)
{
struct dma_pool *pool = arg;
struct linux_dma_obj *obj;
int error, i;
for (i = 0; i < count; i++) {
obj = uma_zalloc(linux_dma_obj_zone, flags);
if (obj == NULL)
break;
error = bus_dmamem_alloc(pool->pool_dmat, &obj->vaddr,
BUS_DMA_NOWAIT, &obj->dmamap);
if (error!= 0) {
uma_zfree(linux_dma_obj_zone, obj);
break;
}
store[i] = obj;
}
return (i);
}
static void
dma_pool_obj_release(void *arg, void **store, int count)
{
struct dma_pool *pool = arg;
struct linux_dma_obj *obj;
int i;
for (i = 0; i < count; i++) {
obj = store[i];
bus_dmamem_free(pool->pool_dmat, obj->vaddr, obj->dmamap);
uma_zfree(linux_dma_obj_zone, obj);
}
}
struct dma_pool *
linux_dma_pool_create(char *name, struct device *dev, size_t size,
size_t align, size_t boundary)
{
struct linux_dma_priv *priv;
struct dma_pool *pool;
priv = dev->dma_priv;
pool = kzalloc(sizeof(*pool), GFP_KERNEL);
pool->pool_device = dev;
pool->pool_entry_size = size;
if (bus_dma_tag_create(bus_get_dma_tag(dev->bsddev),
align, boundary, /* alignment, boundary */
priv->dma_mask, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filtfunc, filtfuncarg */
size, /* maxsize */
1, /* nsegments */
size, /* maxsegsz */
0, /* flags */
NULL, NULL, /* lockfunc, lockfuncarg */
&pool->pool_dmat)) {
kfree(pool);
return (NULL);
}
pool->pool_zone = uma_zcache_create(name, -1, dma_pool_obj_ctor,
dma_pool_obj_dtor, NULL, NULL, dma_pool_obj_import,
dma_pool_obj_release, pool, 0);
mtx_init(&pool->pool_lock, "lkpi-dma-pool", NULL, MTX_DEF);
pctrie_init(&pool->pool_ptree);
return (pool);
}
void
linux_dma_pool_destroy(struct dma_pool *pool)
{
uma_zdestroy(pool->pool_zone);
bus_dma_tag_destroy(pool->pool_dmat);
mtx_destroy(&pool->pool_lock);
kfree(pool);
}
void
lkpi_dmam_pool_destroy(struct device *dev, void *p)
{
struct dma_pool *pool;
pool = *(struct dma_pool **)p;
LINUX_DMA_PCTRIE_RECLAIM(&pool->pool_ptree);
linux_dma_pool_destroy(pool);
}
void *
linux_dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags,
dma_addr_t *handle)
{
struct linux_dma_obj *obj;
obj = uma_zalloc_arg(pool->pool_zone, pool, mem_flags & GFP_NATIVE_MASK);
if (obj == NULL)
return (NULL);
DMA_POOL_LOCK(pool);
if (LINUX_DMA_PCTRIE_INSERT(&pool->pool_ptree, obj) != 0) {
DMA_POOL_UNLOCK(pool);
uma_zfree_arg(pool->pool_zone, obj, pool);
return (NULL);
}
DMA_POOL_UNLOCK(pool);
*handle = obj->dma_addr;
return (obj->vaddr);
}
void
linux_dma_pool_free(struct dma_pool *pool, void *vaddr, dma_addr_t dma_addr)
{
struct linux_dma_obj *obj;
DMA_POOL_LOCK(pool);
obj = LINUX_DMA_PCTRIE_LOOKUP(&pool->pool_ptree, dma_addr);
if (obj == NULL) {
DMA_POOL_UNLOCK(pool);
return;
}
LINUX_DMA_PCTRIE_REMOVE(&pool->pool_ptree, dma_addr);
DMA_POOL_UNLOCK(pool);
uma_zfree_arg(pool->pool_zone, obj, pool);
}
static int
linux_backlight_get_status(device_t dev, struct backlight_props *props)
{
struct pci_dev *pdev;
linux_set_current(curthread);
pdev = device_get_softc(dev);
props->brightness = pdev->dev.bd->props.brightness;
props->brightness = props->brightness * 100 / pdev->dev.bd->props.max_brightness;
props->nlevels = 0;
return (0);
}
static int
linux_backlight_get_info(device_t dev, struct backlight_info *info)
{
struct pci_dev *pdev;
linux_set_current(curthread);
pdev = device_get_softc(dev);
info->type = BACKLIGHT_TYPE_PANEL;
strlcpy(info->name, pdev->dev.bd->name, BACKLIGHTMAXNAMELENGTH);
return (0);
}
static int
linux_backlight_update_status(device_t dev, struct backlight_props *props)
{
struct pci_dev *pdev;
linux_set_current(curthread);
pdev = device_get_softc(dev);
pdev->dev.bd->props.brightness = pdev->dev.bd->props.max_brightness *
props->brightness / 100;
pdev->dev.bd->props.power = props->brightness == 0 ?
4/* FB_BLANK_POWERDOWN */ : 0/* FB_BLANK_UNBLANK */;
return (pdev->dev.bd->ops->update_status(pdev->dev.bd));
}
struct backlight_device *
linux_backlight_device_register(const char *name, struct device *dev,
void *data, const struct backlight_ops *ops, struct backlight_properties *props)
{
dev->bd = malloc(sizeof(*dev->bd), M_DEVBUF, M_WAITOK | M_ZERO);
dev->bd->ops = ops;
dev->bd->props.type = props->type;
dev->bd->props.max_brightness = props->max_brightness;
dev->bd->props.brightness = props->brightness;
dev->bd->props.power = props->power;
dev->bd->data = data;
dev->bd->dev = dev;
dev->bd->name = strdup(name, M_DEVBUF);
dev->backlight_dev = backlight_register(name, dev->bsddev);
return (dev->bd);
}
void
linux_backlight_device_unregister(struct backlight_device *bd)
{
backlight_destroy(bd->dev->backlight_dev);
free(bd->name, M_DEVBUF);
free(bd, M_DEVBUF);
}