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mirror of https://git.FreeBSD.org/src.git synced 2024-12-25 11:37:56 +00:00
freebsd/sys/dev/drm2/drm_gem_names.c
Jean-Sébastien Pédron 455fa6518a drm: Update the device-independent code to match Linux 3.8.13
This update brings few features:
    o  Support for the setmaster/dropmaster ioctls. For instance, they
       are used to run multiple X servers simultaneously.
    o  Support for minor devices. The only user-visible change is a new
       entry in /dev/dri but it is useless at the moment. This is a
       first step to support render nodes [1].

The main benefit is to greatly reduce the diff with Linux (at the
expense of an unreadable commit diff). Hopefully, next upgrades will be
easier.

No updates were made to the drivers, beside adapting them to API
changes.

[1] https://en.wikipedia.org/wiki/Direct_Rendering_Manager#Render_nodes

Tested by:	Many people
MFC after:	1 month
Relnotes:	yes
2015-03-17 18:50:33 +00:00

230 lines
5.5 KiB
C

/*-
* Copyright (c) 2011 The FreeBSD Foundation
* All rights reserved.
*
* This software was developed by Konstantin Belousov 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, 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/kernel.h>
#include <sys/limits.h>
#include <sys/malloc.h>
#include <dev/drm2/drm_gem_names.h>
MALLOC_DEFINE(M_GEM_NAMES, "gem_name", "Hash headers for the gem names");
static void drm_gem_names_delete_name(struct drm_gem_names *names,
struct drm_gem_name *np);
void
drm_gem_names_init(struct drm_gem_names *names)
{
names->unr = new_unrhdr(1, INT_MAX, NULL); /* XXXKIB */
names->names_hash = hashinit(1000 /* XXXKIB */, M_GEM_NAMES,
&names->hash_mask);
mtx_init(&names->lock, "drmnames", NULL, MTX_DEF);
}
void
drm_gem_names_fini(struct drm_gem_names *names)
{
struct drm_gem_name *np;
int i;
mtx_lock(&names->lock);
for (i = 0; i <= names->hash_mask; i++) {
while ((np = LIST_FIRST(&names->names_hash[i])) != NULL) {
drm_gem_names_delete_name(names, np);
mtx_lock(&names->lock);
}
}
mtx_unlock(&names->lock);
mtx_destroy(&names->lock);
hashdestroy(names->names_hash, M_GEM_NAMES, names->hash_mask);
delete_unrhdr(names->unr);
}
static struct drm_gem_names_head *
gem_name_hash_index(struct drm_gem_names *names, int name)
{
return (&names->names_hash[name & names->hash_mask]);
}
void *
drm_gem_name_ref(struct drm_gem_names *names, uint32_t name,
void (*ref)(void *))
{
struct drm_gem_name *n;
mtx_lock(&names->lock);
LIST_FOREACH(n, gem_name_hash_index(names, name), link) {
if (n->name == name) {
if (ref != NULL)
ref(n->ptr);
mtx_unlock(&names->lock);
return (n->ptr);
}
}
mtx_unlock(&names->lock);
return (NULL);
}
struct drm_gem_ptr_match_arg {
uint32_t res;
void *ptr;
};
static int
drm_gem_ptr_match(uint32_t name, void *ptr, void *arg)
{
struct drm_gem_ptr_match_arg *a;
a = arg;
if (ptr == a->ptr) {
a->res = name;
return (1);
} else
return (0);
}
uint32_t
drm_gem_find_name(struct drm_gem_names *names, void *ptr)
{
struct drm_gem_ptr_match_arg arg;
arg.res = 0;
arg.ptr = ptr;
drm_gem_names_foreach(names, drm_gem_ptr_match, &arg);
return (arg.res);
}
void *
drm_gem_find_ptr(struct drm_gem_names *names, uint32_t name)
{
struct drm_gem_name *n;
void *res;
mtx_lock(&names->lock);
LIST_FOREACH(n, gem_name_hash_index(names, name), link) {
if (n->name == name) {
res = n->ptr;
mtx_unlock(&names->lock);
return (res);
}
}
mtx_unlock(&names->lock);
return (NULL);
}
int
drm_gem_name_create(struct drm_gem_names *names, void *p, uint32_t *name)
{
struct drm_gem_name *np;
if (*name != 0) {
return (-EALREADY);
}
np = malloc(sizeof(struct drm_gem_name), M_GEM_NAMES, M_WAITOK);
mtx_lock(&names->lock);
np->name = alloc_unr(names->unr);
if (np->name == -1) {
mtx_unlock(&names->lock);
free(np, M_GEM_NAMES);
return (-ENOMEM);
}
*name = np->name;
np->ptr = p;
LIST_INSERT_HEAD(gem_name_hash_index(names, np->name), np, link);
mtx_unlock(&names->lock);
return (0);
}
static void
drm_gem_names_delete_name(struct drm_gem_names *names, struct drm_gem_name *np)
{
mtx_assert(&names->lock, MA_OWNED);
LIST_REMOVE(np, link);
mtx_unlock(&names->lock);
free_unr(names->unr, np->name);
free(np, M_GEM_NAMES);
}
void *
drm_gem_names_remove(struct drm_gem_names *names, uint32_t name)
{
struct drm_gem_name *n;
void *res;
mtx_lock(&names->lock);
LIST_FOREACH(n, gem_name_hash_index(names, name), link) {
if (n->name == name) {
res = n->ptr;
drm_gem_names_delete_name(names, n);
return (res);
}
}
mtx_unlock(&names->lock);
return (NULL);
}
void
drm_gem_names_foreach(struct drm_gem_names *names,
int (*f)(uint32_t, void *, void *), void *arg)
{
struct drm_gem_name *np;
struct drm_gem_name marker;
int i, fres;
bzero(&marker, sizeof(marker));
marker.name = -1;
mtx_lock(&names->lock);
for (i = 0; i <= names->hash_mask; i++) {
for (np = LIST_FIRST(&names->names_hash[i]); np != NULL; ) {
if (np->name == -1) {
np = LIST_NEXT(np, link);
continue;
}
LIST_INSERT_AFTER(np, &marker, link);
mtx_unlock(&names->lock);
fres = f(np->name, np->ptr, arg);
mtx_lock(&names->lock);
np = LIST_NEXT(&marker, link);
LIST_REMOVE(&marker, link);
if (fres)
break;
}
}
mtx_unlock(&names->lock);
}