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freebsd-skq/sys/dev/pci/pci_user.c
John Baldwin 10012d5309 Reliably return PCI_GETCONF_LAST_DEVICE from PCIOCGETCONF. 
Previously the loop in PCIIOCGETCONF would terminate as soon as it
found enough matches.  Now it will continue iterating through the
PCI device list and only terminate if it finds another matching device
for which it has no room to store a conf structure.  This means that
PCI_GETCONF_LAST_DEVICE is reliably returned when the number of
matching devices is equal to the number of slots in the matches
buffer.  For example, if a program requests the conf structure for a
single PCI function with a specified domain/bus/slot/function it will
now get PCI_GETCONF_LAST_DEVICE instead of PCI_GETCONF_MORE_DEVS.

While here, simplify the loop conditional a bit more by explicitly
breaking out of the loop if copyout() fails and removing a redundant
i < pci_numdevs check.

Reviewed by:	vangyzen, imp
MFC after:	1 month
Sponsored by:	Chelsio Communications
Differential Revision:	https://reviews.freebsd.org/D7445
2016-08-09 17:57:11 +00:00

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/*-
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_bus.h" /* XXX trim includes */
#include "opt_compat.h"
#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 <dev/pci/pcireg.h>
#include <dev/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;
struct cdevsw pcicdev = {
.d_version = D_VERSION,
.d_flags = D_NEEDGIANT,
.d_open = pci_open,
.d_close = pci_close,
.d_ioctl = pci_ioctl,
.d_name = "pci",
};
static int
pci_open(struct cdev *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(struct cdev *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_DOMAIN) != 0)
&& (match_buf->pc_sel.pc_domain !=
matches[i].pc_sel.pc_domain))
continue;
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);
}
#if defined(COMPAT_FREEBSD4) || defined(COMPAT_FREEBSD5) || \
defined(COMPAT_FREEBSD6)
#define PRE7_COMPAT
typedef enum {
PCI_GETCONF_NO_MATCH_OLD = 0x00,
PCI_GETCONF_MATCH_BUS_OLD = 0x01,
PCI_GETCONF_MATCH_DEV_OLD = 0x02,
PCI_GETCONF_MATCH_FUNC_OLD = 0x04,
PCI_GETCONF_MATCH_NAME_OLD = 0x08,
PCI_GETCONF_MATCH_UNIT_OLD = 0x10,
PCI_GETCONF_MATCH_VENDOR_OLD = 0x20,
PCI_GETCONF_MATCH_DEVICE_OLD = 0x40,
PCI_GETCONF_MATCH_CLASS_OLD = 0x80
} pci_getconf_flags_old;
struct pcisel_old {
u_int8_t pc_bus; /* bus number */
u_int8_t pc_dev; /* device on this bus */
u_int8_t pc_func; /* function on this device */
};
struct pci_conf_old {
struct pcisel_old pc_sel; /* bus+slot+function */
u_int8_t pc_hdr; /* PCI header type */
u_int16_t pc_subvendor; /* card vendor ID */
u_int16_t pc_subdevice; /* card device ID, assigned by
card vendor */
u_int16_t pc_vendor; /* chip vendor ID */
u_int16_t pc_device; /* chip device ID, assigned by
chip vendor */
u_int8_t pc_class; /* chip PCI class */
u_int8_t pc_subclass; /* chip PCI subclass */
u_int8_t pc_progif; /* chip PCI programming interface */
u_int8_t pc_revid; /* chip revision ID */
char pd_name[PCI_MAXNAMELEN + 1]; /* device name */
u_long pd_unit; /* device unit number */
};
struct pci_match_conf_old {
struct pcisel_old pc_sel; /* bus+slot+function */
char pd_name[PCI_MAXNAMELEN + 1]; /* device name */
u_long pd_unit; /* Unit number */
u_int16_t pc_vendor; /* PCI Vendor ID */
u_int16_t pc_device; /* PCI Device ID */
u_int8_t pc_class; /* PCI class */
pci_getconf_flags_old flags; /* Matching expression */
};
struct pci_io_old {
struct pcisel_old pi_sel; /* device to operate on */
int pi_reg; /* configuration register to examine */
int pi_width; /* width (in bytes) of read or write */
u_int32_t pi_data; /* data to write or result of read */
};
#ifdef COMPAT_FREEBSD32
struct pci_conf_old32 {
struct pcisel_old pc_sel; /* bus+slot+function */
uint8_t pc_hdr; /* PCI header type */
uint16_t pc_subvendor; /* card vendor ID */
uint16_t pc_subdevice; /* card device ID, assigned by
card vendor */
uint16_t pc_vendor; /* chip vendor ID */
uint16_t pc_device; /* chip device ID, assigned by
chip vendor */
uint8_t pc_class; /* chip PCI class */
uint8_t pc_subclass; /* chip PCI subclass */
uint8_t pc_progif; /* chip PCI programming interface */
uint8_t pc_revid; /* chip revision ID */
char pd_name[PCI_MAXNAMELEN + 1]; /* device name */
uint32_t pd_unit; /* device unit number (u_long) */
};
struct pci_match_conf_old32 {
struct pcisel_old pc_sel; /* bus+slot+function */
char pd_name[PCI_MAXNAMELEN + 1]; /* device name */
uint32_t pd_unit; /* Unit number (u_long) */
uint16_t pc_vendor; /* PCI Vendor ID */
uint16_t pc_device; /* PCI Device ID */
uint8_t pc_class; /* PCI class */
pci_getconf_flags_old flags; /* Matching expression */
};
struct pci_conf_io32 {
uint32_t pat_buf_len; /* pattern buffer length */
uint32_t num_patterns; /* number of patterns */
uint32_t patterns; /* pattern buffer
(struct pci_match_conf_old32 *) */
uint32_t match_buf_len; /* match buffer length */
uint32_t num_matches; /* number of matches returned */
uint32_t matches; /* match buffer
(struct pci_conf_old32 *) */
uint32_t offset; /* offset into device list */
uint32_t generation; /* device list generation */
pci_getconf_status status; /* request status */
};
#define PCIOCGETCONF_OLD32 _IOWR('p', 1, struct pci_conf_io32)
#endif /* COMPAT_FREEBSD32 */
#define PCIOCGETCONF_OLD _IOWR('p', 1, struct pci_conf_io)
#define PCIOCREAD_OLD _IOWR('p', 2, struct pci_io_old)
#define PCIOCWRITE_OLD _IOWR('p', 3, struct pci_io_old)
static int pci_conf_match_old(struct pci_match_conf_old *matches,
int num_matches, struct pci_conf *match_buf);
static int
pci_conf_match_old(struct pci_match_conf_old *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++) {
if (match_buf->pc_sel.pc_domain != 0)
continue;
/*
* I'm not sure why someone would do this...but...
*/
if (matches[i].flags == PCI_GETCONF_NO_MATCH_OLD)
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_OLD) != 0)
&& (match_buf->pc_sel.pc_bus != matches[i].pc_sel.pc_bus))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_DEV_OLD) != 0)
&& (match_buf->pc_sel.pc_dev != matches[i].pc_sel.pc_dev))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_FUNC_OLD) != 0)
&& (match_buf->pc_sel.pc_func != matches[i].pc_sel.pc_func))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_VENDOR_OLD) != 0)
&& (match_buf->pc_vendor != matches[i].pc_vendor))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_DEVICE_OLD) != 0)
&& (match_buf->pc_device != matches[i].pc_device))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_CLASS_OLD) != 0)
&& (match_buf->pc_class != matches[i].pc_class))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_UNIT_OLD) != 0)
&& (match_buf->pd_unit != matches[i].pd_unit))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_NAME_OLD) != 0)
&& (strncmp(matches[i].pd_name, match_buf->pd_name,
sizeof(match_buf->pd_name)) != 0))
continue;
return(0);
}
return(1);
}
#ifdef COMPAT_FREEBSD32
static int
pci_conf_match_old32(struct pci_match_conf_old32 *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++) {
if (match_buf->pc_sel.pc_domain != 0)
continue;
/*
* I'm not sure why someone would do this...but...
*/
if (matches[i].flags == PCI_GETCONF_NO_MATCH_OLD)
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_OLD) != 0) &&
(match_buf->pc_sel.pc_bus != matches[i].pc_sel.pc_bus))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_DEV_OLD) != 0) &&
(match_buf->pc_sel.pc_dev != matches[i].pc_sel.pc_dev))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_FUNC_OLD) != 0) &&
(match_buf->pc_sel.pc_func != matches[i].pc_sel.pc_func))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_VENDOR_OLD) != 0) &&
(match_buf->pc_vendor != matches[i].pc_vendor))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_DEVICE_OLD) != 0) &&
(match_buf->pc_device != matches[i].pc_device))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_CLASS_OLD) != 0) &&
(match_buf->pc_class != matches[i].pc_class))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_UNIT_OLD) != 0) &&
((u_int32_t)match_buf->pd_unit != matches[i].pd_unit))
continue;
if (((matches[i].flags & PCI_GETCONF_MATCH_NAME_OLD) != 0) &&
(strncmp(matches[i].pd_name, match_buf->pd_name,
sizeof(match_buf->pd_name)) != 0))
continue;
return (0);
}
return (1);
}
#endif /* COMPAT_FREEBSD32 */
#endif /* PRE7_COMPAT */
static int
pci_list_vpd(device_t dev, struct pci_list_vpd_io *lvio)
{
struct pci_vpd_element vpd_element, *vpd_user;
struct pcicfg_vpd *vpd;
size_t len;
int error, i;
vpd = pci_fetch_vpd_list(dev);
if (vpd->vpd_reg == 0 || vpd->vpd_ident == NULL)
return (ENXIO);
/*
* Calculate the amount of space needed in the data buffer. An
* identifier element is always present followed by the read-only
* and read-write keywords.
*/
len = sizeof(struct pci_vpd_element) + strlen(vpd->vpd_ident);
for (i = 0; i < vpd->vpd_rocnt; i++)
len += sizeof(struct pci_vpd_element) + vpd->vpd_ros[i].len;
for (i = 0; i < vpd->vpd_wcnt; i++)
len += sizeof(struct pci_vpd_element) + vpd->vpd_w[i].len;
if (lvio->plvi_len == 0) {
lvio->plvi_len = len;
return (0);
}
if (lvio->plvi_len < len) {
lvio->plvi_len = len;
return (ENOMEM);
}
/*
* Copyout the identifier string followed by each keyword and
* value.
*/
vpd_user = lvio->plvi_data;
vpd_element.pve_keyword[0] = '\0';
vpd_element.pve_keyword[1] = '\0';
vpd_element.pve_flags = PVE_FLAG_IDENT;
vpd_element.pve_datalen = strlen(vpd->vpd_ident);
error = copyout(&vpd_element, vpd_user, sizeof(vpd_element));
if (error)
return (error);
error = copyout(vpd->vpd_ident, vpd_user->pve_data,
strlen(vpd->vpd_ident));
if (error)
return (error);
vpd_user = PVE_NEXT(vpd_user);
vpd_element.pve_flags = 0;
for (i = 0; i < vpd->vpd_rocnt; i++) {
vpd_element.pve_keyword[0] = vpd->vpd_ros[i].keyword[0];
vpd_element.pve_keyword[1] = vpd->vpd_ros[i].keyword[1];
vpd_element.pve_datalen = vpd->vpd_ros[i].len;
error = copyout(&vpd_element, vpd_user, sizeof(vpd_element));
if (error)
return (error);
error = copyout(vpd->vpd_ros[i].value, vpd_user->pve_data,
vpd->vpd_ros[i].len);
if (error)
return (error);
vpd_user = PVE_NEXT(vpd_user);
}
vpd_element.pve_flags = PVE_FLAG_RW;
for (i = 0; i < vpd->vpd_wcnt; i++) {
vpd_element.pve_keyword[0] = vpd->vpd_w[i].keyword[0];
vpd_element.pve_keyword[1] = vpd->vpd_w[i].keyword[1];
vpd_element.pve_datalen = vpd->vpd_w[i].len;
error = copyout(&vpd_element, vpd_user, sizeof(vpd_element));
if (error)
return (error);
error = copyout(vpd->vpd_w[i].value, vpd_user->pve_data,
vpd->vpd_w[i].len);
if (error)
return (error);
vpd_user = PVE_NEXT(vpd_user);
}
KASSERT((char *)vpd_user - (char *)lvio->plvi_data == len,
("length mismatch"));
lvio->plvi_len = len;
return (0);
}
static int
pci_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
{
device_t pcidev;
void *confdata;
const char *name;
struct devlist *devlist_head;
struct pci_conf_io *cio = NULL;
struct pci_devinfo *dinfo;
struct pci_io *io;
struct pci_bar_io *bio;
struct pci_list_vpd_io *lvio;
struct pci_match_conf *pattern_buf;
struct pci_map *pm;
size_t confsz, iolen, pbufsz;
int error, ionum, i, num_patterns;
#ifdef PRE7_COMPAT
#ifdef COMPAT_FREEBSD32
struct pci_conf_io32 *cio32 = NULL;
struct pci_conf_old32 conf_old32;
struct pci_match_conf_old32 *pattern_buf_old32 = NULL;
#endif
struct pci_conf_old conf_old;
struct pci_io iodata;
struct pci_io_old *io_old;
struct pci_match_conf_old *pattern_buf_old = NULL;
io_old = NULL;
#endif
if (!(flag & FWRITE)) {
switch (cmd) {
#ifdef PRE7_COMPAT
#ifdef COMPAT_FREEBSD32
case PCIOCGETCONF_OLD32:
#endif
case PCIOCGETCONF_OLD:
#endif
case PCIOCGETCONF:
case PCIOCGETBAR:
case PCIOCLISTVPD:
break;
default:
return (EPERM);
}
}
switch (cmd) {
#ifdef PRE7_COMPAT
#ifdef COMPAT_FREEBSD32
case PCIOCGETCONF_OLD32:
cio32 = (struct pci_conf_io32 *)data;
cio = malloc(sizeof(struct pci_conf_io), M_TEMP, M_WAITOK);
cio->pat_buf_len = cio32->pat_buf_len;
cio->num_patterns = cio32->num_patterns;
cio->patterns = (void *)(uintptr_t)cio32->patterns;
cio->match_buf_len = cio32->match_buf_len;
cio->num_matches = cio32->num_matches;
cio->matches = (void *)(uintptr_t)cio32->matches;
cio->offset = cio32->offset;
cio->generation = cio32->generation;
cio->status = cio32->status;
cio32->num_matches = 0;
break;
#endif
case PCIOCGETCONF_OLD:
#endif
case PCIOCGETCONF:
cio = (struct pci_conf_io *)data;
}
switch (cmd) {
#ifdef PRE7_COMPAT
#ifdef COMPAT_FREEBSD32
case PCIOCGETCONF_OLD32:
#endif
case PCIOCGETCONF_OLD:
#endif
case PCIOCGETCONF:
pattern_buf = NULL;
num_patterns = 0;
dinfo = NULL;
cio->num_matches = 0;
/*
* 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->status = PCI_GETCONF_LIST_CHANGED;
error = 0;
goto getconfexit;
}
/*
* Check to see whether the user has asked for an offset
* past the end of our list.
*/
if (cio->offset >= pci_numdevs) {
cio->status = PCI_GETCONF_LAST_DEVICE;
error = 0;
goto getconfexit;
}
/* 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.
*/
#ifdef PRE7_COMPAT
#ifdef COMPAT_FREEBSD32
if (cmd == PCIOCGETCONF_OLD32)
confsz = sizeof(struct pci_conf_old32);
else
#endif
if (cmd == PCIOCGETCONF_OLD)
confsz = sizeof(struct pci_conf_old);
else
#endif
confsz = sizeof(struct pci_conf);
iolen = min(cio->match_buf_len - (cio->match_buf_len % confsz),
pci_numdevs * confsz);
/*
* Since we know that iolen is a multiple of the size of
* the pciconf union, it's okay to do this.
*/
ionum = iolen / confsz;
/*
* If this test is true, the user wants the pci_conf
* structures returned to match the supplied entries.
*/
if ((cio->num_patterns > 0) && (cio->num_patterns < pci_numdevs)
&& (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.
*/
#ifdef PRE7_COMPAT
#ifdef COMPAT_FREEBSD32
if (cmd == PCIOCGETCONF_OLD32)
pbufsz = sizeof(struct pci_match_conf_old32);
else
#endif
if (cmd == PCIOCGETCONF_OLD)
pbufsz = sizeof(struct pci_match_conf_old);
else
#endif
pbufsz = sizeof(struct pci_match_conf);
if (cio->num_patterns * pbufsz != cio->pat_buf_len) {
/* The user made a mistake, return an error. */
cio->status = PCI_GETCONF_ERROR;
error = EINVAL;
goto getconfexit;
}
/*
* Allocate a buffer to hold the patterns.
*/
#ifdef PRE7_COMPAT
#ifdef COMPAT_FREEBSD32
if (cmd == PCIOCGETCONF_OLD32) {
pattern_buf_old32 = malloc(cio->pat_buf_len,
M_TEMP, M_WAITOK);
error = copyin(cio->patterns,
pattern_buf_old32, cio->pat_buf_len);
} else
#endif /* COMPAT_FREEBSD32 */
if (cmd == PCIOCGETCONF_OLD) {
pattern_buf_old = malloc(cio->pat_buf_len,
M_TEMP, M_WAITOK);
error = copyin(cio->patterns,
pattern_buf_old, cio->pat_buf_len);
} else
#endif /* PRE7_COMPAT */
{
pattern_buf = malloc(cio->pat_buf_len, M_TEMP,
M_WAITOK);
error = copyin(cio->patterns, pattern_buf,
cio->pat_buf_len);
}
if (error != 0) {
error = EINVAL;
goto getconfexit;
}
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;
error = EINVAL;
goto getconfexit;
}
/*
* Go through the list of devices and copy out the devices
* that match the user's criteria.
*/
for (cio->num_matches = 0, i = 0,
dinfo = STAILQ_FIRST(devlist_head);
dinfo != NULL;
dinfo = STAILQ_NEXT(dinfo, pci_links), i++) {
if (i < cio->offset)
continue;
/* Populate pd_name and pd_unit */
name = NULL;
if (dinfo->cfg.dev)
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);
} else {
dinfo->conf.pd_name[0] = '\0';
dinfo->conf.pd_unit = 0;
}
#ifdef PRE7_COMPAT
if (
#ifdef COMPAT_FREEBSD32
(cmd == PCIOCGETCONF_OLD32 &&
(pattern_buf_old32 == NULL ||
pci_conf_match_old32(pattern_buf_old32,
num_patterns, &dinfo->conf) == 0)) ||
#endif
(cmd == PCIOCGETCONF_OLD &&
(pattern_buf_old == NULL ||
pci_conf_match_old(pattern_buf_old, num_patterns,
&dinfo->conf) == 0)) ||
(cmd == PCIOCGETCONF &&
(pattern_buf == NULL ||
pci_conf_match(pattern_buf, num_patterns,
&dinfo->conf) == 0))) {
#else
if (pattern_buf == NULL ||
pci_conf_match(pattern_buf, num_patterns,
&dinfo->conf) == 0) {
#endif
/*
* 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;
#ifdef PRE7_COMPAT
#ifdef COMPAT_FREEBSD32
if (cmd == PCIOCGETCONF_OLD32) {
conf_old32.pc_sel.pc_bus =
dinfo->conf.pc_sel.pc_bus;
conf_old32.pc_sel.pc_dev =
dinfo->conf.pc_sel.pc_dev;
conf_old32.pc_sel.pc_func =
dinfo->conf.pc_sel.pc_func;
conf_old32.pc_hdr = dinfo->conf.pc_hdr;
conf_old32.pc_subvendor =
dinfo->conf.pc_subvendor;
conf_old32.pc_subdevice =
dinfo->conf.pc_subdevice;
conf_old32.pc_vendor =
dinfo->conf.pc_vendor;
conf_old32.pc_device =
dinfo->conf.pc_device;
conf_old32.pc_class =
dinfo->conf.pc_class;
conf_old32.pc_subclass =
dinfo->conf.pc_subclass;
conf_old32.pc_progif =
dinfo->conf.pc_progif;
conf_old32.pc_revid =
dinfo->conf.pc_revid;
strncpy(conf_old32.pd_name,
dinfo->conf.pd_name,
sizeof(conf_old32.pd_name));
conf_old32.pd_name[PCI_MAXNAMELEN] = 0;
conf_old32.pd_unit =
(uint32_t)dinfo->conf.pd_unit;
confdata = &conf_old32;
} else
#endif /* COMPAT_FREEBSD32 */
if (cmd == PCIOCGETCONF_OLD) {
conf_old.pc_sel.pc_bus =
dinfo->conf.pc_sel.pc_bus;
conf_old.pc_sel.pc_dev =
dinfo->conf.pc_sel.pc_dev;
conf_old.pc_sel.pc_func =
dinfo->conf.pc_sel.pc_func;
conf_old.pc_hdr = dinfo->conf.pc_hdr;
conf_old.pc_subvendor =
dinfo->conf.pc_subvendor;
conf_old.pc_subdevice =
dinfo->conf.pc_subdevice;
conf_old.pc_vendor =
dinfo->conf.pc_vendor;
conf_old.pc_device =
dinfo->conf.pc_device;
conf_old.pc_class =
dinfo->conf.pc_class;
conf_old.pc_subclass =
dinfo->conf.pc_subclass;
conf_old.pc_progif =
dinfo->conf.pc_progif;
conf_old.pc_revid =
dinfo->conf.pc_revid;
strncpy(conf_old.pd_name,
dinfo->conf.pd_name,
sizeof(conf_old.pd_name));
conf_old.pd_name[PCI_MAXNAMELEN] = 0;
conf_old.pd_unit =
dinfo->conf.pd_unit;
confdata = &conf_old;
} else
#endif /* PRE7_COMPAT */
confdata = &dinfo->conf;
error = copyout(confdata,
(caddr_t)cio->matches +
confsz * cio->num_matches, confsz);
if (error)
break;
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;
getconfexit:
#ifdef PRE7_COMPAT
#ifdef COMPAT_FREEBSD32
if (cmd == PCIOCGETCONF_OLD32) {
cio32->status = cio->status;
cio32->generation = cio->generation;
cio32->offset = cio->offset;
cio32->num_matches = cio->num_matches;
free(cio, M_TEMP);
}
if (pattern_buf_old32 != NULL)
free(pattern_buf_old32, M_TEMP);
#endif
if (pattern_buf_old != NULL)
free(pattern_buf_old, M_TEMP);
#endif
if (pattern_buf != NULL)
free(pattern_buf, M_TEMP);
break;
#ifdef PRE7_COMPAT
case PCIOCREAD_OLD:
case PCIOCWRITE_OLD:
io_old = (struct pci_io_old *)data;
iodata.pi_sel.pc_domain = 0;
iodata.pi_sel.pc_bus = io_old->pi_sel.pc_bus;
iodata.pi_sel.pc_dev = io_old->pi_sel.pc_dev;
iodata.pi_sel.pc_func = io_old->pi_sel.pc_func;
iodata.pi_reg = io_old->pi_reg;
iodata.pi_width = io_old->pi_width;
iodata.pi_data = io_old->pi_data;
data = (caddr_t)&iodata;
/* FALLTHROUGH */
#endif
case PCIOCREAD:
case PCIOCWRITE:
io = (struct pci_io *)data;
switch(io->pi_width) {
case 4:
case 2:
case 1:
/* Make sure register is not negative and aligned. */
if (io->pi_reg < 0 ||
io->pi_reg & (io->pi_width - 1)) {
error = EINVAL;
break;
}
/*
* Assume that the user-level bus number is
* in fact the physical PCI bus number.
* Look up the grandparent, i.e. the bridge device,
* so that we can issue configuration space cycles.
*/
pcidev = pci_find_dbsf(io->pi_sel.pc_domain,
io->pi_sel.pc_bus, io->pi_sel.pc_dev,
io->pi_sel.pc_func);
if (pcidev) {
#ifdef PRE7_COMPAT
if (cmd == PCIOCWRITE || cmd == PCIOCWRITE_OLD)
#else
if (cmd == PCIOCWRITE)
#endif
pci_write_config(pcidev,
io->pi_reg,
io->pi_data,
io->pi_width);
#ifdef PRE7_COMPAT
else if (cmd == PCIOCREAD_OLD)
io_old->pi_data =
pci_read_config(pcidev,
io->pi_reg,
io->pi_width);
#endif
else
io->pi_data =
pci_read_config(pcidev,
io->pi_reg,
io->pi_width);
error = 0;
} else {
#ifdef COMPAT_FREEBSD4
if (cmd == PCIOCREAD_OLD) {
io_old->pi_data = -1;
error = 0;
} else
#endif
error = ENODEV;
}
break;
default:
error = EINVAL;
break;
}
break;
case PCIOCGETBAR:
bio = (struct pci_bar_io *)data;
/*
* Assume that the user-level bus number is
* in fact the physical PCI bus number.
*/
pcidev = pci_find_dbsf(bio->pbi_sel.pc_domain,
bio->pbi_sel.pc_bus, bio->pbi_sel.pc_dev,
bio->pbi_sel.pc_func);
if (pcidev == NULL) {
error = ENODEV;
break;
}
pm = pci_find_bar(pcidev, bio->pbi_reg);
if (pm == NULL) {
error = EINVAL;
break;
}
bio->pbi_base = pm->pm_value;
bio->pbi_length = (pci_addr_t)1 << pm->pm_size;
bio->pbi_enabled = pci_bar_enabled(pcidev, pm);
error = 0;
break;
case PCIOCATTACHED:
error = 0;
io = (struct pci_io *)data;
pcidev = pci_find_dbsf(io->pi_sel.pc_domain, io->pi_sel.pc_bus,
io->pi_sel.pc_dev, io->pi_sel.pc_func);
if (pcidev != NULL)
io->pi_data = device_is_attached(pcidev);
else
error = ENODEV;
break;
case PCIOCLISTVPD:
lvio = (struct pci_list_vpd_io *)data;
/*
* Assume that the user-level bus number is
* in fact the physical PCI bus number.
*/
pcidev = pci_find_dbsf(lvio->plvi_sel.pc_domain,
lvio->plvi_sel.pc_bus, lvio->plvi_sel.pc_dev,
lvio->plvi_sel.pc_func);
if (pcidev == NULL) {
error = ENODEV;
break;
}
error = pci_list_vpd(pcidev, lvio);
break;
default:
error = ENOTTY;
break;
}
return (error);
}
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