7ac40f5f59
branches: Initialize struct cdevsw using C99 sparse initializtion and remove all initializations to default values. This patch is automatically generated and has been tested by compiling LINT with all the fields in struct cdevsw in reverse order on alpha, sparc64 and i386. Approved by: re(scottl)
489 lines
12 KiB
C
489 lines
12 KiB
C
/*
|
|
* Copyright (c) 1997, Stefan Esser <se@freebsd.org>
|
|
* 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 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.
|
|
*
|
|
* $FreeBSD$
|
|
*
|
|
*/
|
|
|
|
#include "opt_bus.h" /* XXX trim includes */
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/module.h>
|
|
#include <sys/linker.h>
|
|
#include <sys/fcntl.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/queue.h>
|
|
#include <sys/types.h>
|
|
|
|
#include <vm/vm.h>
|
|
#include <vm/pmap.h>
|
|
#include <vm/vm_extern.h>
|
|
|
|
#include <sys/bus.h>
|
|
#include <machine/bus.h>
|
|
#include <sys/rman.h>
|
|
#include <machine/resource.h>
|
|
|
|
#include <sys/pciio.h>
|
|
#include <pci/pcireg.h>
|
|
#include <pci/pcivar.h>
|
|
|
|
#include "pcib_if.h"
|
|
#include "pci_if.h"
|
|
|
|
/*
|
|
* This is the user interface to PCI configuration space.
|
|
*/
|
|
|
|
static d_open_t pci_open;
|
|
static d_close_t pci_close;
|
|
static int pci_conf_match(struct pci_match_conf *matches, int num_matches,
|
|
struct pci_conf *match_buf);
|
|
static d_ioctl_t pci_ioctl;
|
|
|
|
#if __FreeBSD_version < 500000
|
|
#define PCI_CDEV 78
|
|
#else
|
|
#define PCI_CDEV MAJOR_AUTO
|
|
#endif
|
|
|
|
struct cdevsw pcicdev = {
|
|
.d_open = pci_open,
|
|
.d_close = pci_close,
|
|
.d_ioctl = pci_ioctl,
|
|
.d_name = "pci",
|
|
.d_maj = PCI_CDEV,
|
|
};
|
|
|
|
static int
|
|
pci_open(dev_t dev, int oflags, int devtype, struct thread *td)
|
|
{
|
|
int error;
|
|
|
|
if (oflags & FWRITE) {
|
|
error = securelevel_gt(td->td_ucred, 0);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
pci_close(dev_t dev, int flag, int devtype, struct thread *td)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Match a single pci_conf structure against an array of pci_match_conf
|
|
* structures. The first argument, 'matches', is an array of num_matches
|
|
* pci_match_conf structures. match_buf is a pointer to the pci_conf
|
|
* structure that will be compared to every entry in the matches array.
|
|
* This function returns 1 on failure, 0 on success.
|
|
*/
|
|
static int
|
|
pci_conf_match(struct pci_match_conf *matches, int num_matches,
|
|
struct pci_conf *match_buf)
|
|
{
|
|
int i;
|
|
|
|
if ((matches == NULL) || (match_buf == NULL) || (num_matches <= 0))
|
|
return(1);
|
|
|
|
for (i = 0; i < num_matches; i++) {
|
|
/*
|
|
* I'm not sure why someone would do this...but...
|
|
*/
|
|
if (matches[i].flags == PCI_GETCONF_NO_MATCH)
|
|
continue;
|
|
|
|
/*
|
|
* Look at each of the match flags. If it's set, do the
|
|
* comparison. If the comparison fails, we don't have a
|
|
* match, go on to the next item if there is one.
|
|
*/
|
|
if (((matches[i].flags & PCI_GETCONF_MATCH_BUS) != 0)
|
|
&& (match_buf->pc_sel.pc_bus != matches[i].pc_sel.pc_bus))
|
|
continue;
|
|
|
|
if (((matches[i].flags & PCI_GETCONF_MATCH_DEV) != 0)
|
|
&& (match_buf->pc_sel.pc_dev != matches[i].pc_sel.pc_dev))
|
|
continue;
|
|
|
|
if (((matches[i].flags & PCI_GETCONF_MATCH_FUNC) != 0)
|
|
&& (match_buf->pc_sel.pc_func != matches[i].pc_sel.pc_func))
|
|
continue;
|
|
|
|
if (((matches[i].flags & PCI_GETCONF_MATCH_VENDOR) != 0)
|
|
&& (match_buf->pc_vendor != matches[i].pc_vendor))
|
|
continue;
|
|
|
|
if (((matches[i].flags & PCI_GETCONF_MATCH_DEVICE) != 0)
|
|
&& (match_buf->pc_device != matches[i].pc_device))
|
|
continue;
|
|
|
|
if (((matches[i].flags & PCI_GETCONF_MATCH_CLASS) != 0)
|
|
&& (match_buf->pc_class != matches[i].pc_class))
|
|
continue;
|
|
|
|
if (((matches[i].flags & PCI_GETCONF_MATCH_UNIT) != 0)
|
|
&& (match_buf->pd_unit != matches[i].pd_unit))
|
|
continue;
|
|
|
|
if (((matches[i].flags & PCI_GETCONF_MATCH_NAME) != 0)
|
|
&& (strncmp(matches[i].pd_name, match_buf->pd_name,
|
|
sizeof(match_buf->pd_name)) != 0))
|
|
continue;
|
|
|
|
return(0);
|
|
}
|
|
|
|
return(1);
|
|
}
|
|
|
|
static int
|
|
pci_ioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td)
|
|
{
|
|
device_t pci, pcib;
|
|
struct pci_io *io;
|
|
const char *name;
|
|
int error;
|
|
|
|
if (!(flag & FWRITE))
|
|
return EPERM;
|
|
|
|
|
|
switch(cmd) {
|
|
case PCIOCGETCONF:
|
|
{
|
|
struct pci_devinfo *dinfo;
|
|
struct pci_conf_io *cio;
|
|
struct devlist *devlist_head;
|
|
struct pci_match_conf *pattern_buf;
|
|
int num_patterns;
|
|
size_t iolen;
|
|
int ionum, i;
|
|
|
|
cio = (struct pci_conf_io *)data;
|
|
|
|
num_patterns = 0;
|
|
dinfo = NULL;
|
|
|
|
/*
|
|
* Hopefully the user won't pass in a null pointer, but it
|
|
* can't hurt to check.
|
|
*/
|
|
if (cio == NULL) {
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* If the user specified an offset into the device list,
|
|
* but the list has changed since they last called this
|
|
* ioctl, tell them that the list has changed. They will
|
|
* have to get the list from the beginning.
|
|
*/
|
|
if ((cio->offset != 0)
|
|
&& (cio->generation != pci_generation)){
|
|
cio->num_matches = 0;
|
|
cio->status = PCI_GETCONF_LIST_CHANGED;
|
|
error = 0;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Check to see whether the user has asked for an offset
|
|
* past the end of our list.
|
|
*/
|
|
if (cio->offset >= pci_numdevs) {
|
|
cio->num_matches = 0;
|
|
cio->status = PCI_GETCONF_LAST_DEVICE;
|
|
error = 0;
|
|
break;
|
|
}
|
|
|
|
/* get the head of the device queue */
|
|
devlist_head = &pci_devq;
|
|
|
|
/*
|
|
* Determine how much room we have for pci_conf structures.
|
|
* Round the user's buffer size down to the nearest
|
|
* multiple of sizeof(struct pci_conf) in case the user
|
|
* didn't specify a multiple of that size.
|
|
*/
|
|
iolen = min(cio->match_buf_len -
|
|
(cio->match_buf_len % sizeof(struct pci_conf)),
|
|
pci_numdevs * sizeof(struct pci_conf));
|
|
|
|
/*
|
|
* Since we know that iolen is a multiple of the size of
|
|
* the pciconf union, it's okay to do this.
|
|
*/
|
|
ionum = iolen / sizeof(struct pci_conf);
|
|
|
|
/*
|
|
* If this test is true, the user wants the pci_conf
|
|
* structures returned to match the supplied entries.
|
|
*/
|
|
if ((cio->num_patterns > 0)
|
|
&& (cio->pat_buf_len > 0)) {
|
|
/*
|
|
* pat_buf_len needs to be:
|
|
* num_patterns * sizeof(struct pci_match_conf)
|
|
* While it is certainly possible the user just
|
|
* allocated a large buffer, but set the number of
|
|
* matches correctly, it is far more likely that
|
|
* their kernel doesn't match the userland utility
|
|
* they're using. It's also possible that the user
|
|
* forgot to initialize some variables. Yes, this
|
|
* may be overly picky, but I hazard to guess that
|
|
* it's far more likely to just catch folks that
|
|
* updated their kernel but not their userland.
|
|
*/
|
|
if ((cio->num_patterns *
|
|
sizeof(struct pci_match_conf)) != cio->pat_buf_len){
|
|
/* The user made a mistake, return an error*/
|
|
cio->status = PCI_GETCONF_ERROR;
|
|
printf("pci_ioctl: pat_buf_len %d != "
|
|
"num_patterns (%d) * sizeof(struct "
|
|
"pci_match_conf) (%d)\npci_ioctl: "
|
|
"pat_buf_len should be = %d\n",
|
|
cio->pat_buf_len, cio->num_patterns,
|
|
(int)sizeof(struct pci_match_conf),
|
|
(int)sizeof(struct pci_match_conf) *
|
|
cio->num_patterns);
|
|
printf("pci_ioctl: do your headers match your "
|
|
"kernel?\n");
|
|
cio->num_matches = 0;
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Check the user's buffer to make sure it's readable.
|
|
*/
|
|
if (!useracc((caddr_t)cio->patterns,
|
|
cio->pat_buf_len, VM_PROT_READ)) {
|
|
printf("pci_ioctl: pattern buffer %p, "
|
|
"length %u isn't user accessible for"
|
|
" READ\n", cio->patterns,
|
|
cio->pat_buf_len);
|
|
error = EACCES;
|
|
break;
|
|
}
|
|
/*
|
|
* Allocate a buffer to hold the patterns.
|
|
*/
|
|
pattern_buf = malloc(cio->pat_buf_len, M_TEMP,
|
|
M_WAITOK);
|
|
error = copyin(cio->patterns, pattern_buf,
|
|
cio->pat_buf_len);
|
|
if (error != 0)
|
|
break;
|
|
num_patterns = cio->num_patterns;
|
|
|
|
} else if ((cio->num_patterns > 0)
|
|
|| (cio->pat_buf_len > 0)) {
|
|
/*
|
|
* The user made a mistake, spit out an error.
|
|
*/
|
|
cio->status = PCI_GETCONF_ERROR;
|
|
cio->num_matches = 0;
|
|
printf("pci_ioctl: invalid GETCONF arguments\n");
|
|
error = EINVAL;
|
|
break;
|
|
} else
|
|
pattern_buf = NULL;
|
|
|
|
/*
|
|
* Make sure we can write to the match buffer.
|
|
*/
|
|
if (!useracc((caddr_t)cio->matches,
|
|
cio->match_buf_len, VM_PROT_WRITE)) {
|
|
printf("pci_ioctl: match buffer %p, length %u "
|
|
"isn't user accessible for WRITE\n",
|
|
cio->matches, cio->match_buf_len);
|
|
error = EACCES;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Go through the list of devices and copy out the devices
|
|
* that match the user's criteria.
|
|
*/
|
|
for (cio->num_matches = 0, error = 0, i = 0,
|
|
dinfo = STAILQ_FIRST(devlist_head);
|
|
(dinfo != NULL) && (cio->num_matches < ionum)
|
|
&& (error == 0) && (i < pci_numdevs);
|
|
dinfo = STAILQ_NEXT(dinfo, pci_links), i++) {
|
|
|
|
if (i < cio->offset)
|
|
continue;
|
|
|
|
/* Populate pd_name and pd_unit */
|
|
name = NULL;
|
|
if (dinfo->cfg.dev && dinfo->conf.pd_name[0] == '\0')
|
|
name = device_get_name(dinfo->cfg.dev);
|
|
if (name) {
|
|
strncpy(dinfo->conf.pd_name, name,
|
|
sizeof(dinfo->conf.pd_name));
|
|
dinfo->conf.pd_name[PCI_MAXNAMELEN] = 0;
|
|
dinfo->conf.pd_unit =
|
|
device_get_unit(dinfo->cfg.dev);
|
|
}
|
|
|
|
if ((pattern_buf == NULL) ||
|
|
(pci_conf_match(pattern_buf, num_patterns,
|
|
&dinfo->conf) == 0)) {
|
|
|
|
/*
|
|
* If we've filled up the user's buffer,
|
|
* break out at this point. Since we've
|
|
* got a match here, we'll pick right back
|
|
* up at the matching entry. We can also
|
|
* tell the user that there are more matches
|
|
* left.
|
|
*/
|
|
if (cio->num_matches >= ionum)
|
|
break;
|
|
|
|
error = copyout(&dinfo->conf,
|
|
&cio->matches[cio->num_matches],
|
|
sizeof(struct pci_conf));
|
|
cio->num_matches++;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Set the pointer into the list, so if the user is getting
|
|
* n records at a time, where n < pci_numdevs,
|
|
*/
|
|
cio->offset = i;
|
|
|
|
/*
|
|
* Set the generation, the user will need this if they make
|
|
* another ioctl call with offset != 0.
|
|
*/
|
|
cio->generation = pci_generation;
|
|
|
|
/*
|
|
* If this is the last device, inform the user so he won't
|
|
* bother asking for more devices. If dinfo isn't NULL, we
|
|
* know that there are more matches in the list because of
|
|
* the way the traversal is done.
|
|
*/
|
|
if (dinfo == NULL)
|
|
cio->status = PCI_GETCONF_LAST_DEVICE;
|
|
else
|
|
cio->status = PCI_GETCONF_MORE_DEVS;
|
|
|
|
if (pattern_buf != NULL)
|
|
free(pattern_buf, M_TEMP);
|
|
|
|
break;
|
|
}
|
|
case PCIOCREAD:
|
|
io = (struct pci_io *)data;
|
|
switch(io->pi_width) {
|
|
case 4:
|
|
case 2:
|
|
case 1:
|
|
/*
|
|
* Assume that the user-level bus number is
|
|
* actually the pciN instance number. We map
|
|
* from that to the real pcib+bus combination.
|
|
*/
|
|
pci = devclass_get_device(devclass_find("pci"),
|
|
io->pi_sel.pc_bus);
|
|
if (pci) {
|
|
int b = pcib_get_bus(pci);
|
|
pcib = device_get_parent(pci);
|
|
io->pi_data =
|
|
PCIB_READ_CONFIG(pcib,
|
|
b,
|
|
io->pi_sel.pc_dev,
|
|
io->pi_sel.pc_func,
|
|
io->pi_reg,
|
|
io->pi_width);
|
|
error = 0;
|
|
} else {
|
|
error = ENODEV;
|
|
}
|
|
break;
|
|
default:
|
|
error = ENODEV;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case PCIOCWRITE:
|
|
io = (struct pci_io *)data;
|
|
switch(io->pi_width) {
|
|
case 4:
|
|
case 2:
|
|
case 1:
|
|
/*
|
|
* Assume that the user-level bus number is
|
|
* actually the pciN instance number. We map
|
|
* from that to the real pcib+bus combination.
|
|
*/
|
|
pci = devclass_get_device(devclass_find("pci"),
|
|
io->pi_sel.pc_bus);
|
|
if (pci) {
|
|
int b = pcib_get_bus(pci);
|
|
pcib = device_get_parent(pci);
|
|
PCIB_WRITE_CONFIG(pcib,
|
|
b,
|
|
io->pi_sel.pc_dev,
|
|
io->pi_sel.pc_func,
|
|
io->pi_reg,
|
|
io->pi_data,
|
|
io->pi_width);
|
|
error = 0;
|
|
} else {
|
|
error = ENODEV;
|
|
}
|
|
break;
|
|
default:
|
|
error = ENODEV;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
error = ENOTTY;
|
|
break;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|