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      1 /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
      2 
      3 /*
      4  * Copyright (C) 2012 Rob Clark <robclark (at) freedesktop.org>
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice (including the next
     14  * paragraph) shall be included in all copies or substantial portions of the
     15  * Software.
     16  *
     17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
     23  * SOFTWARE.
     24  *
     25  * Authors:
     26  *    Rob Clark <robclark (at) freedesktop.org>
     27  */
     28 
     29 #include <sys/types.h>
     30 #include <sys/stat.h>
     31 #include <unistd.h>
     32 
     33 #include "freedreno_drmif.h"
     34 #include "freedreno_priv.h"
     35 
     36 static pthread_mutex_t table_lock = PTHREAD_MUTEX_INITIALIZER;
     37 
     38 struct fd_device * kgsl_device_new(int fd);
     39 struct fd_device * msm_device_new(int fd);
     40 
     41 struct fd_device * fd_device_new(int fd)
     42 {
     43 	struct fd_device *dev;
     44 	drmVersionPtr version;
     45 
     46 	/* figure out if we are kgsl or msm drm driver: */
     47 	version = drmGetVersion(fd);
     48 	if (!version) {
     49 		ERROR_MSG("cannot get version: %s", strerror(errno));
     50 		return NULL;
     51 	}
     52 
     53 	if (!strcmp(version->name, "msm")) {
     54 		DEBUG_MSG("msm DRM device");
     55 		if (version->version_major != 1) {
     56 			ERROR_MSG("unsupported version: %u.%u.%u", version->version_major,
     57 				version->version_minor, version->version_patchlevel);
     58 			dev = NULL;
     59 			goto out;
     60 		}
     61 
     62 		dev = msm_device_new(fd);
     63 		dev->version = version->version_minor;
     64 #if HAVE_FREEDRENO_KGSL
     65 	} else if (!strcmp(version->name, "kgsl")) {
     66 		DEBUG_MSG("kgsl DRM device");
     67 		dev = kgsl_device_new(fd);
     68 #endif
     69 	} else {
     70 		ERROR_MSG("unknown device: %s", version->name);
     71 		dev = NULL;
     72 	}
     73 
     74 out:
     75 	drmFreeVersion(version);
     76 
     77 	if (!dev)
     78 		return NULL;
     79 
     80 	atomic_set(&dev->refcnt, 1);
     81 	dev->fd = fd;
     82 	dev->handle_table = drmHashCreate();
     83 	dev->name_table = drmHashCreate();
     84 	fd_bo_cache_init(&dev->bo_cache, FALSE);
     85 
     86 	return dev;
     87 }
     88 
     89 /* like fd_device_new() but creates it's own private dup() of the fd
     90  * which is close()d when the device is finalized.
     91  */
     92 struct fd_device * fd_device_new_dup(int fd)
     93 {
     94 	int dup_fd = dup(fd);
     95 	struct fd_device *dev = fd_device_new(dup_fd);
     96 	if (dev)
     97 		dev->closefd = 1;
     98 	else
     99 		close(dup_fd);
    100 	return dev;
    101 }
    102 
    103 struct fd_device * fd_device_ref(struct fd_device *dev)
    104 {
    105 	atomic_inc(&dev->refcnt);
    106 	return dev;
    107 }
    108 
    109 static void fd_device_del_impl(struct fd_device *dev)
    110 {
    111 	int close_fd = dev->closefd ? dev->fd : -1;
    112 	fd_bo_cache_cleanup(&dev->bo_cache, 0);
    113 	drmHashDestroy(dev->handle_table);
    114 	drmHashDestroy(dev->name_table);
    115 	dev->funcs->destroy(dev);
    116 	if (close_fd >= 0)
    117 		close(close_fd);
    118 }
    119 
    120 drm_private void fd_device_del_locked(struct fd_device *dev)
    121 {
    122 	if (!atomic_dec_and_test(&dev->refcnt))
    123 		return;
    124 	fd_device_del_impl(dev);
    125 }
    126 
    127 void fd_device_del(struct fd_device *dev)
    128 {
    129 	if (!atomic_dec_and_test(&dev->refcnt))
    130 		return;
    131 	pthread_mutex_lock(&table_lock);
    132 	fd_device_del_impl(dev);
    133 	pthread_mutex_unlock(&table_lock);
    134 }
    135 
    136 int fd_device_fd(struct fd_device *dev)
    137 {
    138 	return dev->fd;
    139 }
    140 
    141 enum fd_version fd_device_version(struct fd_device *dev)
    142 {
    143 	return dev->version;
    144 }
    145