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      1 /*
      2  * Copyright (C) 2014 Etnaviv Project
      3  *
      4  * Permission is hereby granted, free of charge, to any person obtaining a
      5  * copy of this software and associated documentation files (the "Software"),
      6  * to deal in the Software without restriction, including without limitation
      7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      8  * and/or sell copies of the Software, and to permit persons to whom the
      9  * Software is furnished to do so, subject to the following conditions:
     10  *
     11  * The above copyright notice and this permission notice (including the next
     12  * paragraph) shall be included in all copies or substantial portions of the
     13  * Software.
     14  *
     15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
     21  * SOFTWARE.
     22  *
     23  * Authors:
     24  *    Christian Gmeiner <christian.gmeiner (at) gmail.com>
     25  */
     26 
     27 #ifdef HAVE_CONFIG_H
     28 #include "config.h"
     29 #endif
     30 
     31 #include <stdlib.h>
     32 #include <linux/stddef.h>
     33 #include <linux/types.h>
     34 #include <errno.h>
     35 #include <sys/mman.h>
     36 #include <fcntl.h>
     37 #include <unistd.h>
     38 #include <pthread.h>
     39 
     40 #include <xf86drm.h>
     41 #include <xf86atomic.h>
     42 
     43 #include "etnaviv_priv.h"
     44 #include "etnaviv_drmif.h"
     45 
     46 static pthread_mutex_t table_lock = PTHREAD_MUTEX_INITIALIZER;
     47 
     48 struct etna_device *etna_device_new(int fd)
     49 {
     50 	struct etna_device *dev = calloc(sizeof(*dev), 1);
     51 
     52 	if (!dev)
     53 		return NULL;
     54 
     55 	atomic_set(&dev->refcnt, 1);
     56 	dev->fd = fd;
     57 	dev->handle_table = drmHashCreate();
     58 	dev->name_table = drmHashCreate();
     59 	etna_bo_cache_init(&dev->bo_cache);
     60 
     61 	return dev;
     62 }
     63 
     64 /* like etna_device_new() but creates it's own private dup() of the fd
     65  * which is close()d when the device is finalized. */
     66 struct etna_device *etna_device_new_dup(int fd)
     67 {
     68 	int dup_fd = dup(fd);
     69 	struct etna_device *dev = etna_device_new(dup_fd);
     70 
     71 	if (dev)
     72 		dev->closefd = 1;
     73 	else
     74 		close(dup_fd);
     75 
     76 	return dev;
     77 }
     78 
     79 struct etna_device *etna_device_ref(struct etna_device *dev)
     80 {
     81 	atomic_inc(&dev->refcnt);
     82 
     83 	return dev;
     84 }
     85 
     86 static void etna_device_del_impl(struct etna_device *dev)
     87 {
     88 	etna_bo_cache_cleanup(&dev->bo_cache, 0);
     89 	drmHashDestroy(dev->handle_table);
     90 	drmHashDestroy(dev->name_table);
     91 
     92 	if (dev->closefd)
     93 		close(dev->fd);
     94 
     95 	free(dev);
     96 }
     97 
     98 drm_private void etna_device_del_locked(struct etna_device *dev)
     99 {
    100 	if (!atomic_dec_and_test(&dev->refcnt))
    101 		return;
    102 
    103 	etna_device_del_impl(dev);
    104 }
    105 
    106 void etna_device_del(struct etna_device *dev)
    107 {
    108 	if (!atomic_dec_and_test(&dev->refcnt))
    109 		return;
    110 
    111 	pthread_mutex_lock(&table_lock);
    112 	etna_device_del_impl(dev);
    113 	pthread_mutex_unlock(&table_lock);
    114 }
    115 
    116 int etna_device_fd(struct etna_device *dev)
    117 {
    118    return dev->fd;
    119 }
    120