Home | History | Annotate | Download | only in freedreno 
      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 #ifdef HAVE_CONFIG_H
     30 # include <config.h>
     31 #endif
     32 
     33 #include <sys/types.h>
     34 #include <sys/stat.h>
     35 #include <unistd.h>
     36 
     37 #include "freedreno_drmif.h"
     38 #include "freedreno_priv.h"
     39 
     40 static pthread_mutex_t table_lock = PTHREAD_MUTEX_INITIALIZER;
     41 
     42 struct fd_device * kgsl_device_new(int fd);
     43 struct fd_device * msm_device_new(int fd);
     44 
     45 struct fd_device * fd_device_new(int fd)
     46 {
     47 	struct fd_device *dev;
     48 	drmVersionPtr version;
     49 
     50 	/* figure out if we are kgsl or msm drm driver: */
     51 	version = drmGetVersion(fd);
     52 	if (!version) {
     53 		ERROR_MSG("cannot get version: %s", strerror(errno));
     54 		return NULL;
     55 	}
     56 
     57 	if (!strcmp(version->name, "msm")) {
     58 		DEBUG_MSG("msm DRM device");
     59 		if (version->version_major != 1) {
     60 			ERROR_MSG("unsupported version: %u.%u.%u", version->version_major,
     61 				version->version_minor, version->version_patchlevel);
     62 			dev = NULL;
     63 			goto out;
     64 		}
     65 
     66 		dev = msm_device_new(fd);
     67 		dev->version = version->version_minor;
     68 #ifdef HAVE_FREEDRENO_KGSL
     69 	} else if (!strcmp(version->name, "kgsl")) {
     70 		DEBUG_MSG("kgsl DRM device");
     71 		dev = kgsl_device_new(fd);
     72 #endif
     73 	} else {
     74 		ERROR_MSG("unknown device: %s", version->name);
     75 		dev = NULL;
     76 	}
     77 
     78 out:
     79 	drmFreeVersion(version);
     80 
     81 	if (!dev)
     82 		return NULL;
     83 
     84 	atomic_set(&dev->refcnt, 1);
     85 	dev->fd = fd;
     86 	dev->handle_table = drmHashCreate();
     87 	dev->name_table = drmHashCreate();
     88 	fd_bo_cache_init(&dev->bo_cache, FALSE);
     89 
     90 	return dev;
     91 }
     92 
     93 /* like fd_device_new() but creates it's own private dup() of the fd
     94  * which is close()d when the device is finalized.
     95  */
     96 struct fd_device * fd_device_new_dup(int fd)
     97 {
     98 	int dup_fd = dup(fd);
     99 	struct fd_device *dev = fd_device_new(dup_fd);
    100 	if (dev)
    101 		dev->closefd = 1;
    102 	else
    103 		close(dup_fd);
    104 	return dev;
    105 }
    106 
    107 struct fd_device * fd_device_ref(struct fd_device *dev)
    108 {
    109 	atomic_inc(&dev->refcnt);
    110 	return dev;
    111 }
    112 
    113 static void fd_device_del_impl(struct fd_device *dev)
    114 {
    115 	fd_bo_cache_cleanup(&dev->bo_cache, 0);
    116 	drmHashDestroy(dev->handle_table);
    117 	drmHashDestroy(dev->name_table);
    118 	if (dev->closefd)
    119 		close(dev->fd);
    120 	dev->funcs->destroy(dev);
    121 }
    122 
    123 drm_private void fd_device_del_locked(struct fd_device *dev)
    124 {
    125 	if (!atomic_dec_and_test(&dev->refcnt))
    126 		return;
    127 	fd_device_del_impl(dev);
    128 }
    129 
    130 void fd_device_del(struct fd_device *dev)
    131 {
    132 	if (!atomic_dec_and_test(&dev->refcnt))
    133 		return;
    134 	pthread_mutex_lock(&table_lock);
    135 	fd_device_del_impl(dev);
    136 	pthread_mutex_unlock(&table_lock);
    137 }
    138 
    139 int fd_device_fd(struct fd_device *dev)
    140 {
    141 	return dev->fd;
    142 }
    143 
    144 enum fd_version fd_device_version(struct fd_device *dev)
    145 {
    146 	return dev->version;
    147 }
    148