freebsd-dev/sys/dev/drm2/drm_sysctl.c
Pawel Biernacki 59e4be225c Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (5 of many)
r357614 added CTLFLAG_NEEDGIANT to make it easier to find nodes that are
still not MPSAFE (or already are but aren’t properly marked). Use it in
preparation for a general review of all nodes.
This is non-functional change that adds annotations to SYSCTL_NODE and
SYSCTL_PROC nodes using one of the soon-to-be-required flags.

Reviewed by:	imp, kib
Approved by:	kib (mentor)
Differential Revision:	https://reviews.freebsd.org/D23633
2020-02-16 17:11:54 +00:00

398 lines
10 KiB
C

/*-
* Copyright 2003 Eric Anholt
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* ERIC ANHOLT BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/** @file drm_sysctl.c
* Implementation of various sysctls for controlling DRM behavior and reporting
* debug information.
*/
#include <dev/drm2/drmP.h>
#include <dev/drm2/drm.h>
#include <sys/sysctl.h>
static int drm_name_info DRM_SYSCTL_HANDLER_ARGS;
static int drm_vm_info DRM_SYSCTL_HANDLER_ARGS;
static int drm_clients_info DRM_SYSCTL_HANDLER_ARGS;
static int drm_bufs_info DRM_SYSCTL_HANDLER_ARGS;
static int drm_vblank_info DRM_SYSCTL_HANDLER_ARGS;
struct drm_sysctl_list {
const char *name;
int (*f) DRM_SYSCTL_HANDLER_ARGS;
} drm_sysctl_list[] = {
{"name", drm_name_info},
{"vm", drm_vm_info},
{"clients", drm_clients_info},
{"bufs", drm_bufs_info},
{"vblank", drm_vblank_info},
};
#define DRM_SYSCTL_ENTRIES (sizeof(drm_sysctl_list)/sizeof(drm_sysctl_list[0]))
struct drm_sysctl_info {
struct sysctl_ctx_list ctx;
char name[2];
};
int drm_sysctl_init(struct drm_device *dev)
{
struct drm_sysctl_info *info;
struct sysctl_oid *oid;
struct sysctl_oid *top, *drioid;
int i;
info = malloc(sizeof *info, DRM_MEM_DRIVER, M_WAITOK | M_ZERO);
dev->sysctl = info;
/* Add the sysctl node for DRI if it doesn't already exist */
drioid = SYSCTL_ADD_NODE(&info->ctx, SYSCTL_CHILDREN(&sysctl___hw), OID_AUTO,
"dri", CTLFLAG_RW | CTLFLAG_MPSAFE, NULL, "DRI Graphics");
if (!drioid) {
free(dev->sysctl, DRM_MEM_DRIVER);
dev->sysctl = NULL;
return (-ENOMEM);
}
/* Find the next free slot under hw.dri */
i = 0;
SLIST_FOREACH(oid, SYSCTL_CHILDREN(drioid), oid_link) {
if (i <= oid->oid_arg2)
i = oid->oid_arg2 + 1;
}
if (i > 9) {
drm_sysctl_cleanup(dev);
return (-ENOSPC);
}
dev->sysctl_node_idx = i;
/* Add the hw.dri.x for our device */
info->name[0] = '0' + i;
info->name[1] = 0;
top = SYSCTL_ADD_NODE(&info->ctx, SYSCTL_CHILDREN(drioid),
OID_AUTO, info->name, CTLFLAG_RW | CTLFLAG_MPSAFE, NULL, NULL);
if (!top) {
drm_sysctl_cleanup(dev);
return (-ENOMEM);
}
for (i = 0; i < DRM_SYSCTL_ENTRIES; i++) {
oid = SYSCTL_ADD_OID(&info->ctx, SYSCTL_CHILDREN(top),
OID_AUTO, drm_sysctl_list[i].name,
CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NEEDGIANT,
dev, 0, drm_sysctl_list[i].f, "A", NULL);
if (!oid) {
drm_sysctl_cleanup(dev);
return (-ENOMEM);
}
}
SYSCTL_ADD_INT(&info->ctx, SYSCTL_CHILDREN(drioid), OID_AUTO, "debug",
CTLFLAG_RW, &drm_debug, sizeof(drm_debug),
"Enable debugging output");
SYSCTL_ADD_INT(&info->ctx, SYSCTL_CHILDREN(drioid), OID_AUTO, "notyet",
CTLFLAG_RW, &drm_notyet, sizeof(drm_debug),
"Enable notyet reminders");
if (dev->driver->sysctl_init != NULL)
dev->driver->sysctl_init(dev, &info->ctx, top);
SYSCTL_ADD_INT(&info->ctx, SYSCTL_CHILDREN(drioid), OID_AUTO,
"vblank_offdelay", CTLFLAG_RW, &drm_vblank_offdelay,
sizeof(drm_vblank_offdelay),
"");
SYSCTL_ADD_INT(&info->ctx, SYSCTL_CHILDREN(drioid), OID_AUTO,
"timestamp_precision", CTLFLAG_RW, &drm_timestamp_precision,
sizeof(drm_timestamp_precision),
"");
return (0);
}
int drm_sysctl_cleanup(struct drm_device *dev)
{
int error;
if (dev->sysctl == NULL)
return (0);
error = sysctl_ctx_free(&dev->sysctl->ctx);
free(dev->sysctl, DRM_MEM_DRIVER);
dev->sysctl = NULL;
if (dev->driver->sysctl_cleanup != NULL)
dev->driver->sysctl_cleanup(dev);
return (-error);
}
#define DRM_SYSCTL_PRINT(fmt, arg...) \
do { \
snprintf(buf, sizeof(buf), fmt, ##arg); \
retcode = SYSCTL_OUT(req, buf, strlen(buf)); \
if (retcode) \
goto done; \
} while (0)
static int drm_name_info DRM_SYSCTL_HANDLER_ARGS
{
struct drm_device *dev = arg1;
struct drm_minor *minor;
struct drm_master *master;
char buf[128];
int retcode;
int hasunique = 0;
/* FIXME: This still uses primary minor. */
minor = dev->primary;
DRM_SYSCTL_PRINT("%s 0x%jx", dev->driver->name,
(uintmax_t)dev2udev(minor->device));
DRM_LOCK(dev);
master = minor->master;
if (master != NULL && master->unique) {
snprintf(buf, sizeof(buf), " %s", master->unique);
hasunique = 1;
}
DRM_UNLOCK(dev);
if (hasunique)
SYSCTL_OUT(req, buf, strlen(buf));
SYSCTL_OUT(req, "", 1);
done:
return retcode;
}
static int drm_vm_info DRM_SYSCTL_HANDLER_ARGS
{
struct drm_device *dev = arg1;
struct drm_map_list *entry;
struct drm_local_map *map, *tempmaps;
const char *types[] = {
[_DRM_FRAME_BUFFER] = "FB",
[_DRM_REGISTERS] = "REG",
[_DRM_SHM] = "SHM",
[_DRM_AGP] = "AGP",
[_DRM_SCATTER_GATHER] = "SG",
[_DRM_CONSISTENT] = "CONS",
[_DRM_GEM] = "GEM"
};
const char *type, *yesno;
int i, mapcount;
char buf[128];
int retcode;
/* We can't hold the lock while doing SYSCTL_OUTs, so allocate a
* temporary copy of all the map entries and then SYSCTL_OUT that.
*/
DRM_LOCK(dev);
mapcount = 0;
list_for_each_entry(entry, &dev->maplist, head) {
if (entry->map != NULL)
mapcount++;
}
tempmaps = malloc(sizeof(*tempmaps) * mapcount, DRM_MEM_DRIVER,
M_NOWAIT);
if (tempmaps == NULL) {
DRM_UNLOCK(dev);
return ENOMEM;
}
i = 0;
list_for_each_entry(entry, &dev->maplist, head) {
if (entry->map != NULL)
tempmaps[i++] = *entry->map;
}
DRM_UNLOCK(dev);
DRM_SYSCTL_PRINT("\nslot offset size "
"type flags address mtrr\n");
for (i = 0; i < mapcount; i++) {
map = &tempmaps[i];
switch(map->type) {
default:
type = "??";
break;
case _DRM_FRAME_BUFFER:
case _DRM_REGISTERS:
case _DRM_SHM:
case _DRM_AGP:
case _DRM_SCATTER_GATHER:
case _DRM_CONSISTENT:
case _DRM_GEM:
type = types[map->type];
break;
}
if (map->mtrr < 0)
yesno = "no";
else
yesno = "yes";
DRM_SYSCTL_PRINT(
"%4d 0x%016llx 0x%08lx %4.4s 0x%02x 0x%016lx %s\n",
i, (unsigned long long)map->offset, map->size, type,
map->flags, (unsigned long)map->handle, yesno);
}
SYSCTL_OUT(req, "", 1);
done:
free(tempmaps, DRM_MEM_DRIVER);
return retcode;
}
static int drm_bufs_info DRM_SYSCTL_HANDLER_ARGS
{
struct drm_device *dev = arg1;
struct drm_device_dma *dma = dev->dma;
struct drm_device_dma tempdma;
int *templists;
int i;
char buf[128];
int retcode;
/* We can't hold the locks around DRM_SYSCTL_PRINT, so make a temporary
* copy of the whole structure and the relevant data from buflist.
*/
DRM_LOCK(dev);
if (dma == NULL) {
DRM_UNLOCK(dev);
return 0;
}
DRM_SPINLOCK(&dev->dma_lock);
tempdma = *dma;
templists = malloc(sizeof(int) * dma->buf_count, DRM_MEM_DRIVER,
M_NOWAIT);
for (i = 0; i < dma->buf_count; i++)
templists[i] = dma->buflist[i]->list;
dma = &tempdma;
DRM_SPINUNLOCK(&dev->dma_lock);
DRM_UNLOCK(dev);
DRM_SYSCTL_PRINT("\n o size count free segs pages kB\n");
for (i = 0; i <= DRM_MAX_ORDER; i++) {
if (dma->bufs[i].buf_count)
DRM_SYSCTL_PRINT("%2d %8d %5d %5d %5d %5d %5d\n",
i,
dma->bufs[i].buf_size,
dma->bufs[i].buf_count,
atomic_read(&dma->bufs[i]
.freelist.count),
dma->bufs[i].seg_count,
dma->bufs[i].seg_count
*(1 << dma->bufs[i].page_order),
(dma->bufs[i].seg_count
* (1 << dma->bufs[i].page_order))
* (int)PAGE_SIZE / 1024);
}
DRM_SYSCTL_PRINT("\n");
for (i = 0; i < dma->buf_count; i++) {
if (i && !(i%32)) DRM_SYSCTL_PRINT("\n");
DRM_SYSCTL_PRINT(" %d", templists[i]);
}
DRM_SYSCTL_PRINT("\n");
SYSCTL_OUT(req, "", 1);
done:
free(templists, DRM_MEM_DRIVER);
return retcode;
}
static int drm_clients_info DRM_SYSCTL_HANDLER_ARGS
{
struct drm_device *dev = arg1;
struct drm_file *priv, *tempprivs;
char buf[128];
int retcode;
int privcount, i;
DRM_LOCK(dev);
privcount = 0;
list_for_each_entry(priv, &dev->filelist, lhead)
privcount++;
tempprivs = malloc(sizeof(struct drm_file) * privcount, DRM_MEM_DRIVER,
M_NOWAIT);
if (tempprivs == NULL) {
DRM_UNLOCK(dev);
return ENOMEM;
}
i = 0;
list_for_each_entry(priv, &dev->filelist, lhead)
tempprivs[i++] = *priv;
DRM_UNLOCK(dev);
DRM_SYSCTL_PRINT(
"\na dev pid uid magic ioctls\n");
for (i = 0; i < privcount; i++) {
priv = &tempprivs[i];
DRM_SYSCTL_PRINT("%c %-12s %5d %5d %10u %10lu\n",
priv->authenticated ? 'y' : 'n',
devtoname(priv->minor->device),
priv->pid,
priv->uid,
priv->magic,
priv->ioctl_count);
}
SYSCTL_OUT(req, "", 1);
done:
free(tempprivs, DRM_MEM_DRIVER);
return retcode;
}
static int drm_vblank_info DRM_SYSCTL_HANDLER_ARGS
{
struct drm_device *dev = arg1;
char buf[128];
int retcode;
int i;
DRM_SYSCTL_PRINT("\ncrtc ref count last enabled inmodeset\n");
DRM_LOCK(dev);
if (dev->_vblank_count == NULL)
goto done;
for (i = 0 ; i < dev->num_crtcs ; i++) {
DRM_SYSCTL_PRINT(" %02d %02d %08d %08d %02d %02d\n",
i, dev->vblank_refcount[i],
dev->_vblank_count[i],
dev->last_vblank[i],
dev->vblank_enabled[i],
dev->vblank_inmodeset[i]);
}
done:
DRM_UNLOCK(dev);
SYSCTL_OUT(req, "", -1);
return retcode;
}