freebsd-dev/sys/compat/linsysfs/linsysfs.c
Edward Tomasz Napierala 8b99a63fd8 Make linprocfs(5) create /proc/bus/pci/devices/, and linsysfs(5)
create /sys/class/power_supply/.  This silences some warnings
from biology/linux-foldingathome.

Reported by:	0mp
MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D25557
2020-07-04 11:22:35 +00:00

702 lines
17 KiB
C

/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2006 IronPort Systems
* 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.
*
* 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/systm.h>
#include <sys/ctype.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mount.h>
#include <sys/sbuf.h>
#include <sys/smp.h>
#include <sys/socket.h>
#include <sys/bus.h>
#include <sys/pciio.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_dl.h>
#include <compat/linux/linux.h>
#include <compat/linux/linux_common.h>
#include <compat/linux/linux_util.h>
#include <fs/pseudofs/pseudofs.h>
struct scsi_host_queue {
TAILQ_ENTRY(scsi_host_queue) scsi_host_next;
char *path;
char *name;
};
TAILQ_HEAD(,scsi_host_queue) scsi_host_q;
static int host_number = 0;
static int
atoi(const char *str)
{
return (int)strtol(str, (char **)NULL, 10);
}
static int
linsysfs_ifnet_addr(PFS_FILL_ARGS)
{
struct l_sockaddr lsa;
struct ifnet *ifp;
ifp = ifname_linux_to_bsd(td, pn->pn_parent->pn_name, NULL);
if (ifp == NULL)
return (ENOENT);
if (linux_ifhwaddr(ifp, &lsa) != 0)
return (ENOENT);
sbuf_printf(sb, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx\n",
lsa.sa_data[0], lsa.sa_data[1], lsa.sa_data[2],
lsa.sa_data[3], lsa.sa_data[4], lsa.sa_data[5]);
return (0);
}
static int
linsysfs_ifnet_addrlen(PFS_FILL_ARGS)
{
sbuf_printf(sb, "%d\n", LINUX_IFHWADDRLEN);
return (0);
}
static int
linsysfs_ifnet_flags(PFS_FILL_ARGS)
{
struct ifnet *ifp;
unsigned short flags;
ifp = ifname_linux_to_bsd(td, pn->pn_parent->pn_name, NULL);
if (ifp == NULL)
return (ENOENT);
linux_ifflags(ifp, &flags);
sbuf_printf(sb, "0x%x\n", flags);
return (0);
}
static int
linsysfs_ifnet_ifindex(PFS_FILL_ARGS)
{
struct ifnet *ifp;
ifp = ifname_linux_to_bsd(td, pn->pn_parent->pn_name, NULL);
if (ifp == NULL)
return (ENOENT);
sbuf_printf(sb, "%u\n", ifp->if_index);
return (0);
}
static int
linsysfs_ifnet_mtu(PFS_FILL_ARGS)
{
struct ifnet *ifp;
ifp = ifname_linux_to_bsd(td, pn->pn_parent->pn_name, NULL);
if (ifp == NULL)
return (ENOENT);
sbuf_printf(sb, "%u\n", ifp->if_mtu);
return (0);
}
static int
linsysfs_ifnet_tx_queue_len(PFS_FILL_ARGS)
{
/* XXX */
sbuf_printf(sb, "1000\n");
return (0);
}
static int
linsysfs_ifnet_type(PFS_FILL_ARGS)
{
struct l_sockaddr lsa;
struct ifnet *ifp;
ifp = ifname_linux_to_bsd(td, pn->pn_parent->pn_name, NULL);
if (ifp == NULL)
return (ENOENT);
if (linux_ifhwaddr(ifp, &lsa) != 0)
return (ENOENT);
sbuf_printf(sb, "%d\n", lsa.sa_family);
return (0);
}
static void
linsysfs_listnics(struct pfs_node *dir)
{
struct pfs_node *nic;
struct pfs_node *lo;
nic = pfs_create_dir(dir, "eth0", NULL, NULL, NULL, 0);
pfs_create_file(nic, "address", &linsysfs_ifnet_addr,
NULL, NULL, NULL, PFS_RD);
pfs_create_file(nic, "addr_len", &linsysfs_ifnet_addrlen,
NULL, NULL, NULL, PFS_RD);
pfs_create_file(nic, "flags", &linsysfs_ifnet_flags,
NULL, NULL, NULL, PFS_RD);
pfs_create_file(nic, "ifindex", &linsysfs_ifnet_ifindex,
NULL, NULL, NULL, PFS_RD);
pfs_create_file(nic, "mtu", &linsysfs_ifnet_mtu,
NULL, NULL, NULL, PFS_RD);
pfs_create_file(nic, "tx_queue_len", &linsysfs_ifnet_tx_queue_len,
NULL, NULL, NULL, PFS_RD);
pfs_create_file(nic, "type", &linsysfs_ifnet_type,
NULL, NULL, NULL, PFS_RD);
lo = pfs_create_dir(dir, "lo", NULL, NULL, NULL, 0);
pfs_create_file(lo, "address", &linsysfs_ifnet_addr,
NULL, NULL, NULL, PFS_RD);
pfs_create_file(lo, "addr_len", &linsysfs_ifnet_addrlen,
NULL, NULL, NULL, PFS_RD);
pfs_create_file(lo, "flags", &linsysfs_ifnet_flags,
NULL, NULL, NULL, PFS_RD);
pfs_create_file(lo, "ifindex", &linsysfs_ifnet_ifindex,
NULL, NULL, NULL, PFS_RD);
pfs_create_file(lo, "mtu", &linsysfs_ifnet_mtu,
NULL, NULL, NULL, PFS_RD);
pfs_create_file(lo, "tx_queue_len", &linsysfs_ifnet_tx_queue_len,
NULL, NULL, NULL, PFS_RD);
pfs_create_file(lo, "type", &linsysfs_ifnet_type,
NULL, NULL, NULL, PFS_RD);
}
/*
* Filler function for proc_name
*/
static int
linsysfs_scsiname(PFS_FILL_ARGS)
{
struct scsi_host_queue *scsi_host;
int index;
if (strncmp(pn->pn_parent->pn_name, "host", 4) == 0) {
index = atoi(&pn->pn_parent->pn_name[4]);
} else {
sbuf_printf(sb, "unknown\n");
return (0);
}
TAILQ_FOREACH(scsi_host, &scsi_host_q, scsi_host_next) {
if (index-- == 0) {
sbuf_printf(sb, "%s\n", scsi_host->name);
return (0);
}
}
sbuf_printf(sb, "unknown\n");
return (0);
}
/*
* Filler function for device sym-link
*/
static int
linsysfs_link_scsi_host(PFS_FILL_ARGS)
{
struct scsi_host_queue *scsi_host;
int index;
if (strncmp(pn->pn_parent->pn_name, "host", 4) == 0) {
index = atoi(&pn->pn_parent->pn_name[4]);
} else {
sbuf_printf(sb, "unknown\n");
return (0);
}
TAILQ_FOREACH(scsi_host, &scsi_host_q, scsi_host_next) {
if (index-- == 0) {
sbuf_printf(sb, "../../../devices%s", scsi_host->path);
return(0);
}
}
sbuf_printf(sb, "unknown\n");
return (0);
}
static int
linsysfs_fill_data(PFS_FILL_ARGS)
{
sbuf_printf(sb, "%s", (char *)pn->pn_data);
return (0);
}
static int
linsysfs_fill_vendor(PFS_FILL_ARGS)
{
sbuf_printf(sb, "0x%04x\n", pci_get_vendor((device_t)pn->pn_data));
return (0);
}
static int
linsysfs_fill_device(PFS_FILL_ARGS)
{
sbuf_printf(sb, "0x%04x\n", pci_get_device((device_t)pn->pn_data));
return (0);
}
static int
linsysfs_fill_subvendor(PFS_FILL_ARGS)
{
sbuf_printf(sb, "0x%04x\n", pci_get_subvendor((device_t)pn->pn_data));
return (0);
}
static int
linsysfs_fill_subdevice(PFS_FILL_ARGS)
{
sbuf_printf(sb, "0x%04x\n", pci_get_subdevice((device_t)pn->pn_data));
return (0);
}
static int
linsysfs_fill_revid(PFS_FILL_ARGS)
{
sbuf_printf(sb, "0x%x\n", pci_get_revid((device_t)pn->pn_data));
return (0);
}
static int
linsysfs_fill_config(PFS_FILL_ARGS)
{
uint8_t config[48];
device_t dev;
uint32_t reg;
dev = (device_t)pn->pn_data;
bzero(config, sizeof(config));
reg = pci_get_vendor(dev);
config[0] = reg;
config[1] = reg >> 8;
reg = pci_get_device(dev);
config[2] = reg;
config[3] = reg >> 8;
reg = pci_get_revid(dev);
config[8] = reg;
reg = pci_get_subvendor(dev);
config[44] = reg;
config[45] = reg >> 8;
reg = pci_get_subdevice(dev);
config[46] = reg;
config[47] = reg >> 8;
sbuf_bcat(sb, config, sizeof(config));
return (0);
}
/*
* Filler function for PCI uevent file
*/
static int
linsysfs_fill_uevent_pci(PFS_FILL_ARGS)
{
device_t dev;
dev = (device_t)pn->pn_data;
sbuf_printf(sb, "DRIVER=%s\nPCI_CLASS=%X\nPCI_ID=%04X:%04X\n"
"PCI_SUBSYS_ID=%04X:%04X\nPCI_SLOT_NAME=%04d:%02x:%02x.%x\n",
linux_driver_get_name_dev(dev), pci_get_class(dev),
pci_get_vendor(dev), pci_get_device(dev), pci_get_subvendor(dev),
pci_get_subdevice(dev), pci_get_domain(dev), pci_get_bus(dev),
pci_get_slot(dev), pci_get_function(dev));
return (0);
}
/*
* Filler function for drm uevent file
*/
static int
linsysfs_fill_uevent_drm(PFS_FILL_ARGS)
{
device_t dev;
int unit;
dev = (device_t)pn->pn_data;
unit = device_get_unit(dev);
sbuf_printf(sb,
"MAJOR=226\nMINOR=%d\nDEVNAME=dri/card%d\nDEVTYPE=dri_minor\n",
unit, unit);
return (0);
}
static char *
get_full_pfs_path(struct pfs_node *cur)
{
char *temp, *path;
temp = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
path = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
path[0] = '\0';
do {
snprintf(temp, MAXPATHLEN, "%s/%s", cur->pn_name, path);
strlcpy(path, temp, MAXPATHLEN);
cur = cur->pn_parent;
} while (cur->pn_parent != NULL);
path[strlen(path) - 1] = '\0'; /* remove extra slash */
free(temp, M_TEMP);
return (path);
}
/*
* Filler function for symlink from drm char device to PCI device
*/
static int
linsysfs_fill_vgapci(PFS_FILL_ARGS)
{
char *path;
path = get_full_pfs_path((struct pfs_node*)pn->pn_data);
sbuf_printf(sb, "../../../%s", path);
free(path, M_TEMP);
return (0);
}
#undef PCI_DEV
#define PCI_DEV "pci"
#define DRMN_DEV "drmn"
static int
linsysfs_run_bus(device_t dev, struct pfs_node *dir, struct pfs_node *scsi,
struct pfs_node *chardev, struct pfs_node *drm, char *path, char *prefix)
{
struct scsi_host_queue *scsi_host;
struct pfs_node *sub_dir, *cur_file;
int i, nchildren, error;
device_t *children, parent;
devclass_t devclass;
const char *name = NULL;
struct pci_devinfo *dinfo;
char *device, *host, *new_path, *devname;
new_path = path;
devname = malloc(16, M_TEMP, M_WAITOK);
parent = device_get_parent(dev);
if (parent) {
devclass = device_get_devclass(parent);
if (devclass != NULL)
name = devclass_get_name(devclass);
if (name && strcmp(name, PCI_DEV) == 0) {
dinfo = device_get_ivars(dev);
if (dinfo) {
device = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
new_path = malloc(MAXPATHLEN, M_TEMP,
M_WAITOK);
new_path[0] = '\000';
strcpy(new_path, path);
host = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
device[0] = '\000';
sprintf(device, "%s:%02x:%02x.%x",
prefix,
dinfo->cfg.bus,
dinfo->cfg.slot,
dinfo->cfg.func);
strcat(new_path, "/");
strcat(new_path, device);
dir = pfs_create_dir(dir, device,
NULL, NULL, NULL, 0);
cur_file = pfs_create_file(dir, "vendor",
&linsysfs_fill_vendor, NULL, NULL, NULL,
PFS_RD);
cur_file->pn_data = (void*)dev;
cur_file = pfs_create_file(dir, "device",
&linsysfs_fill_device, NULL, NULL, NULL,
PFS_RD);
cur_file->pn_data = (void*)dev;
cur_file = pfs_create_file(dir,
"subsystem_vendor",
&linsysfs_fill_subvendor, NULL, NULL, NULL,
PFS_RD);
cur_file->pn_data = (void*)dev;
cur_file = pfs_create_file(dir,
"subsystem_device",
&linsysfs_fill_subdevice, NULL, NULL, NULL,
PFS_RD);
cur_file->pn_data = (void*)dev;
cur_file = pfs_create_file(dir, "revision",
&linsysfs_fill_revid, NULL, NULL, NULL,
PFS_RD);
cur_file->pn_data = (void*)dev;
cur_file = pfs_create_file(dir, "config",
&linsysfs_fill_config, NULL, NULL, NULL,
PFS_RD);
cur_file->pn_data = (void*)dev;
cur_file = pfs_create_file(dir, "uevent",
&linsysfs_fill_uevent_pci, NULL, NULL,
NULL, PFS_RD);
cur_file->pn_data = (void*)dev;
cur_file = pfs_create_link(dir, "subsystem",
&linsysfs_fill_data, NULL, NULL, NULL, 0);
/* libdrm just checks that the link ends in "/pci" */
cur_file->pn_data = "/sys/bus/pci";
if (dinfo->cfg.baseclass == PCIC_STORAGE) {
/* DJA only make this if needed */
sprintf(host, "host%d", host_number++);
strcat(new_path, "/");
strcat(new_path, host);
pfs_create_dir(dir, host,
NULL, NULL, NULL, 0);
scsi_host = malloc(sizeof(
struct scsi_host_queue),
M_DEVBUF, M_NOWAIT);
scsi_host->path = malloc(
strlen(new_path) + 1,
M_DEVBUF, M_NOWAIT);
scsi_host->path[0] = '\000';
bcopy(new_path, scsi_host->path,
strlen(new_path) + 1);
scsi_host->name = "unknown";
sub_dir = pfs_create_dir(scsi, host,
NULL, NULL, NULL, 0);
pfs_create_link(sub_dir, "device",
&linsysfs_link_scsi_host,
NULL, NULL, NULL, 0);
pfs_create_file(sub_dir, "proc_name",
&linsysfs_scsiname,
NULL, NULL, NULL, PFS_RD);
scsi_host->name
= linux_driver_get_name_dev(dev);
TAILQ_INSERT_TAIL(&scsi_host_q,
scsi_host, scsi_host_next);
}
free(device, M_TEMP);
free(host, M_TEMP);
}
}
devclass = device_get_devclass(dev);
if (devclass != NULL)
name = devclass_get_name(devclass);
else
name = NULL;
if (name != NULL && strcmp(name, DRMN_DEV) == 0 &&
device_get_unit(dev) >= 0) {
dinfo = device_get_ivars(parent);
if (dinfo != NULL && dinfo->cfg.baseclass == PCIC_DISPLAY) {
pfs_create_dir(dir, "drm", NULL, NULL, NULL, 0);
sprintf(devname, "226:%d",
device_get_unit(dev));
sub_dir = pfs_create_dir(chardev,
devname, NULL, NULL, NULL, 0);
cur_file = pfs_create_link(sub_dir,
"device", &linsysfs_fill_vgapci, NULL,
NULL, NULL, PFS_RD);
cur_file->pn_data = (void*)dir;
cur_file = pfs_create_file(sub_dir,
"uevent", &linsysfs_fill_uevent_drm, NULL,
NULL, NULL, PFS_RD);
cur_file->pn_data = (void*)dev;
sprintf(devname, "card%d",
device_get_unit(dev));
sub_dir = pfs_create_dir(drm,
devname, NULL, NULL, NULL, 0);
cur_file = pfs_create_link(sub_dir,
"device", &linsysfs_fill_vgapci, NULL,
NULL, NULL, PFS_RD);
cur_file->pn_data = (void*)dir;
}
}
}
error = device_get_children(dev, &children, &nchildren);
if (error == 0) {
for (i = 0; i < nchildren; i++)
if (children[i])
linsysfs_run_bus(children[i], dir, scsi,
chardev, drm, new_path, prefix);
free(children, M_TEMP);
}
if (new_path != path)
free(new_path, M_TEMP);
free(devname, M_TEMP);
return (1);
}
/*
* Filler function for sys/devices/system/cpu/{online,possible,present}
*/
static int
linsysfs_cpuonline(PFS_FILL_ARGS)
{
sbuf_printf(sb, "%d-%d\n", CPU_FIRST(), mp_maxid);
return (0);
}
/*
* Filler function for sys/devices/system/cpu/cpuX/online
*/
static int
linsysfs_cpuxonline(PFS_FILL_ARGS)
{
sbuf_printf(sb, "1\n");
return (0);
}
static void
linsysfs_listcpus(struct pfs_node *dir)
{
struct pfs_node *cpu;
char *name;
int i, count, len;
len = 1;
count = mp_maxcpus;
while (count > 10) {
count /= 10;
len++;
}
len += sizeof("cpu");
name = malloc(len, M_TEMP, M_WAITOK);
for (i = 0; i < mp_ncpus; ++i) {
/* /sys/devices/system/cpu/cpuX */
sprintf(name, "cpu%d", i);
cpu = pfs_create_dir(dir, name, NULL, NULL, NULL, 0);
pfs_create_file(cpu, "online", &linsysfs_cpuxonline,
NULL, NULL, NULL, PFS_RD);
}
free(name, M_TEMP);
}
/*
* Constructor
*/
static int
linsysfs_init(PFS_INIT_ARGS)
{
struct pfs_node *root;
struct pfs_node *class;
struct pfs_node *dir, *sys, *cpu;
struct pfs_node *drm;
struct pfs_node *pci;
struct pfs_node *scsi;
struct pfs_node *net;
struct pfs_node *power_supply;
struct pfs_node *devdir, *chardev;
devclass_t devclass;
device_t dev;
TAILQ_INIT(&scsi_host_q);
root = pi->pi_root;
/* /sys/class/... */
class = pfs_create_dir(root, "class", NULL, NULL, NULL, 0);
scsi = pfs_create_dir(class, "scsi_host", NULL, NULL, NULL, 0);
drm = pfs_create_dir(class, "drm", NULL, NULL, NULL, 0);
power_supply = pfs_create_dir(class, "power_supply", NULL, NULL, NULL, 0);
/* /sys/class/net/.. */
net = pfs_create_dir(class, "net", NULL, NULL, NULL, 0);
/* /sys/dev/... */
devdir = pfs_create_dir(root, "dev", NULL, NULL, NULL, 0);
chardev = pfs_create_dir(devdir, "char", NULL, NULL, NULL, 0);
/* /sys/devices/... */
dir = pfs_create_dir(root, "devices", NULL, NULL, NULL, 0);
pci = pfs_create_dir(dir, "pci0000:00", NULL, NULL, NULL, 0);
devclass = devclass_find("root");
if (devclass == NULL) {
return (0);
}
dev = devclass_get_device(devclass, 0);
linsysfs_run_bus(dev, pci, scsi, chardev, drm, "/pci0000:00", "0000");
/* /sys/devices/system */
sys = pfs_create_dir(dir, "system", NULL, NULL, NULL, 0);
/* /sys/devices/system/cpu */
cpu = pfs_create_dir(sys, "cpu", NULL, NULL, NULL, 0);
pfs_create_file(cpu, "online", &linsysfs_cpuonline,
NULL, NULL, NULL, PFS_RD);
pfs_create_file(cpu, "possible", &linsysfs_cpuonline,
NULL, NULL, NULL, PFS_RD);
pfs_create_file(cpu, "present", &linsysfs_cpuonline,
NULL, NULL, NULL, PFS_RD);
linsysfs_listcpus(cpu);
linsysfs_listnics(net);
return (0);
}
/*
* Destructor
*/
static int
linsysfs_uninit(PFS_INIT_ARGS)
{
struct scsi_host_queue *scsi_host, *scsi_host_tmp;
TAILQ_FOREACH_SAFE(scsi_host, &scsi_host_q, scsi_host_next,
scsi_host_tmp) {
TAILQ_REMOVE(&scsi_host_q, scsi_host, scsi_host_next);
free(scsi_host->path, M_TEMP);
free(scsi_host, M_TEMP);
}
return (0);
}
PSEUDOFS(linsysfs, 1, VFCF_JAIL);
#if defined(__aarch64__) || defined(__amd64__)
MODULE_DEPEND(linsysfs, linux_common, 1, 1, 1);
#else
MODULE_DEPEND(linsysfs, linux, 1, 1, 1);
#endif