| Message ID | 20230626073426.285659-3-aesteve@redhat.com |
|---|---|
| State | New |
| Headers | show |
| Series | Virtio shared dma-buf | expand |
On Mon, Jun 26, 2023 at 09:34:24AM +0200, Albert Esteve wrote: > This API manages objects (in this iteration, > dmabuf fds) that can be shared along different > virtio devices. > > The API allows the different devices to add, > remove and/or retrieve the objects by simply > invoking the public functions that reside in the > virtio-dmabuf file. > Suggested-by: Gerd Hoffmann <kraxel@redhat.com> > Signed-off-by: Albert Esteve <aesteve@redhat.com> > --- > MAINTAINERS | 7 ++ > hw/display/meson.build | 1 + > hw/display/virtio-dmabuf.c | 90 ++++++++++++++++++++++++ > include/hw/virtio/virtio-dmabuf.h | 59 ++++++++++++++++ > tests/unit/meson.build | 1 + > tests/unit/test-virtio-dmabuf.c | 112 ++++++++++++++++++++++++++++++ > 6 files changed, 270 insertions(+) > create mode 100644 hw/display/virtio-dmabuf.c > create mode 100644 include/hw/virtio/virtio-dmabuf.h > create mode 100644 tests/unit/test-virtio-dmabuf.c > > diff --git a/MAINTAINERS b/MAINTAINERS > index 7f323cd2eb..ce77a691a1 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -2150,6 +2150,13 @@ T: git https://gitlab.com/cohuck/qemu.git s390-next > T: git https://github.com/borntraeger/qemu.git s390-next > L: qemu-s390x@nongnu.org > > +virtio-dmabuf > +M: Albert Esteve <aesteve@redhat.com> > +S: Supported > +F: hw/display/virtio-dmabuf.c > +F: include/hw/virtio/virtio-dmabuf.h > +F: tests/unit/test-virtio-dmabuf.c > + > virtiofs > M: Stefan Hajnoczi <stefanha@redhat.com> > S: Supported Hmm new functionality that no one seems to care about enough to review, Gerd you suggested this - ready to be a maintainer? co-maintain with Albert? > diff --git a/hw/display/meson.build b/hw/display/meson.build > index 413ba4ab24..05619c6968 100644 > --- a/hw/display/meson.build > +++ b/hw/display/meson.build > @@ -37,6 +37,7 @@ system_ss.add(when: 'CONFIG_MACFB', if_true: files('macfb.c')) > system_ss.add(when: 'CONFIG_NEXTCUBE', if_true: files('next-fb.c')) > > system_ss.add(when: 'CONFIG_VGA', if_true: files('vga.c')) > +system_ss.add(when: 'CONFIG_VIRTIO', if_true: files('virtio-dmabuf.c')) > > if (config_all_devices.has_key('CONFIG_VGA_CIRRUS') or > config_all_devices.has_key('CONFIG_VGA_PCI') or > diff --git a/hw/display/virtio-dmabuf.c b/hw/display/virtio-dmabuf.c > new file mode 100644 > index 0000000000..7dba0b2c71 > --- /dev/null > +++ b/hw/display/virtio-dmabuf.c > @@ -0,0 +1,90 @@ > +/* > + * Virtio Shared dma-buf > + * > + * Copyright Red Hat, Inc. 2023 > + * > + * Authors: > + * Albert Esteve <aesteve@redhat.com> > + * > + * This work is licensed under the terms of the GNU GPL, version 2 or later. > + * See the COPYING file in the top-level directory. > + */ > + > +#include "hw/virtio/virtio-dmabuf.h" > + > + > +static GMutex lock; > +static GHashTable *resource_uuids; > + > +/* > + * uuid_equal_func: wrapper for UUID is_equal function to > + * satisfy g_hash_table_new expected parameters signatures. > + */ > +static int uuid_equal_func(const void *lhv, const void *rhv) > +{ > + return qemu_uuid_is_equal(lhv, rhv); > +} > + > +static bool virtio_add_resource(QemuUUID *uuid, gpointer value) > +{ > + assert(resource_uuids != NULL); > + if (g_hash_table_lookup(resource_uuids, uuid) != NULL) { > + return false; > + } > + > + return g_hash_table_insert(resource_uuids, uuid, value); > +} > + > +static gpointer virtio_lookup_resource(const QemuUUID *uuid) > +{ > + if (resource_uuids == NULL) { > + return NULL; > + } > + > + return g_hash_table_lookup(resource_uuids, uuid); > +} > + > +bool virtio_add_dmabuf(QemuUUID *uuid, int udmabuf_fd) > +{ > + bool result; > + if (udmabuf_fd < 0) { > + return false; > + } > + g_mutex_lock(&lock); > + if (resource_uuids == NULL) { > + resource_uuids = g_hash_table_new(qemu_uuid_hash, uuid_equal_func); > + } > + result = virtio_add_resource(uuid, GINT_TO_POINTER(udmabuf_fd)); > + g_mutex_unlock(&lock); > + > + return result; > +} > + > +bool virtio_remove_resource(const QemuUUID *uuid) > +{ > + bool result; > + g_mutex_lock(&lock); > + result = g_hash_table_remove(resource_uuids, uuid); > + g_mutex_unlock(&lock); > + > + return result; > +} > + > +int virtio_lookup_dmabuf(const QemuUUID *uuid) > +{ > + g_mutex_lock(&lock); > + gpointer lookup_res = virtio_lookup_resource(uuid); > + g_mutex_unlock(&lock); > + if (lookup_res == NULL) { > + return -1; > + } > + > + return GPOINTER_TO_INT(lookup_res); > +} > + > +void virtio_free_resources(void) > +{ > + g_hash_table_destroy(resource_uuids); > + /* Reference count shall be 0 after the implicit unref on destroy */ > + resource_uuids = NULL; > +} > diff --git a/include/hw/virtio/virtio-dmabuf.h b/include/hw/virtio/virtio-dmabuf.h > new file mode 100644 > index 0000000000..4fdd394c4b > --- /dev/null > +++ b/include/hw/virtio/virtio-dmabuf.h > @@ -0,0 +1,59 @@ > +/* > + * Virtio Shared dma-buf > + * > + * Copyright Red Hat, Inc. 2023 > + * > + * Authors: > + * Albert Esteve <aesteve@redhat.com> > + * > + * This work is licensed under the terms of the GNU GPL, version 2. > + * See the COPYING file in the top-level directory. > + */ > + > +#ifndef VIRTIO_DMABUF_H > +#define VIRTIO_DMABUF_H > + > +#include "qemu/osdep.h" > + > +#include <glib.h> > +#include "qemu/uuid.h" > + > +/** > + * virtio_add_dmabuf() - Add a new dma-buf resource to the lookup table > + * @uuid: new resource's UUID > + * @dmabuf_fd: the dma-buf descriptor that will be stored and shared with > + * other virtio devices. The caller retains ownership over the > + * descriptor and its lifecycle. > + * > + * Note: @dmabuf_fd must be a valid (non-negative) file descriptor. > + * > + * Return: true if the UUID did not exist and the resource has been added, > + * false if another resource with the same UUID already existed. > + * Note that if it finds a repeated UUID, the resource is not inserted in > + * the lookup table. > + */ > +bool virtio_add_dmabuf(QemuUUID *uuid, int dmabuf_fd); > + > +/** > + * virtio_remove_resource() - Removes a resource from the lookup table > + * @uuid: resource's UUID > + * > + * Return: true if the UUID has been found and removed from the lookup table. > + */ > +bool virtio_remove_resource(const QemuUUID *uuid); > + > +/** > + * virtio_lookup_dmabuf() - Looks for a dma-buf resource in the lookup table > + * @uuid: resource's UUID > + * > + * Return: the dma-buf file descriptor integer, or -1 if the key is not found. > + */ > +int virtio_lookup_dmabuf(const QemuUUID *uuid); > + > +/** > + * virtio_free_resources() - Destroys all keys and values of the shared > + * resources lookup table, and frees them > + */ > +void virtio_free_resources(void); > + > +#endif /* VIRTIO_DMABUF_H */ > diff --git a/tests/unit/meson.build b/tests/unit/meson.build > index 93977cc32d..425ecc30fb 100644 > --- a/tests/unit/meson.build > +++ b/tests/unit/meson.build > @@ -50,6 +50,7 @@ tests = { > 'test-qapi-util': [], > 'test-interval-tree': [], > 'test-xs-node': [qom], > + 'test-virtio-dmabuf': [meson.project_source_root() / 'hw/display/virtio-dmabuf.c'], > } > > if have_system or have_tools > diff --git a/tests/unit/test-virtio-dmabuf.c b/tests/unit/test-virtio-dmabuf.c > new file mode 100644 > index 0000000000..53436aa93d > --- /dev/null > +++ b/tests/unit/test-virtio-dmabuf.c > @@ -0,0 +1,112 @@ > +/* > + * QEMU tests for shared dma-buf API > + * > + * Copyright (c) 2023 Red Hat, Inc. > + * > + * This library is free software; you can redistribute it and/or > + * modify it under the terms of the GNU Lesser General Public > + * License as published by the Free Software Foundation; either > + * version 2.1 of the License, or (at your option) any later version. > + * > + * This library is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + * Lesser General Public License for more details. > + * > + * You should have received a copy of the GNU Lesser General Public > + * License along with this library; if not, see <http://www.gnu.org/licenses/>. > + * > + */ > + > +#include "qemu/osdep.h" > +#include "hw/virtio/virtio-dmabuf.h" > + > + > +static void test_add_remove_resources(void) > +{ > + QemuUUID uuid; > + int i, dmabuf_fd; > + > + for (i = 0; i < 100; ++i) { > + qemu_uuid_generate(&uuid); > + dmabuf_fd = g_random_int_range(3, 500); > + /* Add a new resource */ > + g_assert(virtio_add_dmabuf(&uuid, dmabuf_fd)); > + g_assert_cmpint(virtio_lookup_dmabuf(&uuid), ==, dmabuf_fd); > + /* Remove the resource */ > + g_assert(virtio_remove_resource(&uuid)); > + /* Resource is not found anymore */ > + g_assert_cmpint(virtio_lookup_dmabuf(&uuid), ==, -1); > + } > +} > + > +static void test_remove_invalid_resource(void) > +{ > + QemuUUID uuid; > + int i; > + > + for (i = 0; i < 20; ++i) { > + qemu_uuid_generate(&uuid); > + g_assert_cmpint(virtio_lookup_dmabuf(&uuid), ==, -1); > + /* Removing a resource that does not exist returns false */ > + g_assert_false(virtio_remove_resource(&uuid)); > + } > +} > + > +static void test_add_invalid_resource(void) > +{ > + QemuUUID uuid; > + int i, dmabuf_fd = -2, alt_dmabuf = 2; > + > + for (i = 0; i < 20; ++i) { > + qemu_uuid_generate(&uuid); > + /* Add a new resource with invalid (negative) resource fd */ > + g_assert_false(virtio_add_dmabuf(&uuid, dmabuf_fd)); > + /* Resource is not found */ > + g_assert_cmpint(virtio_lookup_dmabuf(&uuid), ==, -1); > + } > + > + for (i = 0; i < 20; ++i) { > + /* Add a valid resource */ > + qemu_uuid_generate(&uuid); > + dmabuf_fd = g_random_int_range(3, 500); > + g_assert(virtio_add_dmabuf(&uuid, dmabuf_fd)); > + g_assert_cmpint(virtio_lookup_dmabuf(&uuid), ==, dmabuf_fd); > + /* Add a new resource with repeated uuid returns false */ > + g_assert_false(virtio_add_dmabuf(&uuid, alt_dmabuf)); > + /* The value for the uuid key is not replaced */ > + g_assert_cmpint(virtio_lookup_dmabuf(&uuid), ==, dmabuf_fd); > + } > +} > + > +static void test_free_resources(void) > +{ > + QemuUUID uuids[20]; > + int i, dmabuf_fd; > + > + for (i = 0; i < ARRAY_SIZE(uuids); ++i) { > + qemu_uuid_generate(&uuids[i]); > + dmabuf_fd = g_random_int_range(3, 500); > + g_assert(virtio_add_dmabuf(&uuids[i], dmabuf_fd)); > + g_assert_cmpint(virtio_lookup_dmabuf(&uuids[i]), ==, dmabuf_fd); > + } > + virtio_free_resources(); > + for (i = 0; i < ARRAY_SIZE(uuids); ++i) { > + /* None of the resources is found after free'd */ > + g_assert_cmpint(virtio_lookup_dmabuf(&uuids[i]), ==, -1); > + } > + > +} > + > +int main(int argc, char **argv) > +{ > + g_test_init(&argc, &argv, NULL); > + g_test_add_func("/virtio-dmabuf/add_rm_res", test_add_remove_resources); > + g_test_add_func("/virtio-dmabuf/rm_invalid_res", > + test_remove_invalid_resource); > + g_test_add_func("/virtio-dmabuf/add_invalid_res", > + test_add_invalid_resource); > + g_test_add_func("/virtio-dmabuf/free_res", test_free_resources); > + > + return g_test_run(); > +} > -- > 2.40.0
Hi, > > M: Stefan Hajnoczi <stefanha@redhat.com> > > S: Supported > > Hmm new functionality that no one seems to care > about enough to review, > > Gerd you suggested this - ready to be a maintainer? > co-maintain with Albert? Quite busy with firmware, I don't really have the time to take more qemu stuff, I'm already struggling to care about the qemu bits I'm still listed as maintainer for ... Patch looks fine to me. This just maintains a list of buffers, references by uuid. Use case is buffer sharing, i.e. guest creates a virtio-gpu buffers, shares it with another driver (virtio-video for example) inside the guest, the buffer uuid can be used by the device emulation backends on the host side to establish the same sharing. take care, Gerd
diff --git a/MAINTAINERS b/MAINTAINERS index 7f323cd2eb..ce77a691a1 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2150,6 +2150,13 @@ T: git https://gitlab.com/cohuck/qemu.git s390-next T: git https://github.com/borntraeger/qemu.git s390-next L: qemu-s390x@nongnu.org +virtio-dmabuf +M: Albert Esteve <aesteve@redhat.com> +S: Supported +F: hw/display/virtio-dmabuf.c +F: include/hw/virtio/virtio-dmabuf.h +F: tests/unit/test-virtio-dmabuf.c + virtiofs M: Stefan Hajnoczi <stefanha@redhat.com> S: Supported diff --git a/hw/display/meson.build b/hw/display/meson.build index 413ba4ab24..05619c6968 100644 --- a/hw/display/meson.build +++ b/hw/display/meson.build @@ -37,6 +37,7 @@ system_ss.add(when: 'CONFIG_MACFB', if_true: files('macfb.c')) system_ss.add(when: 'CONFIG_NEXTCUBE', if_true: files('next-fb.c')) system_ss.add(when: 'CONFIG_VGA', if_true: files('vga.c')) +system_ss.add(when: 'CONFIG_VIRTIO', if_true: files('virtio-dmabuf.c')) if (config_all_devices.has_key('CONFIG_VGA_CIRRUS') or config_all_devices.has_key('CONFIG_VGA_PCI') or diff --git a/hw/display/virtio-dmabuf.c b/hw/display/virtio-dmabuf.c new file mode 100644 index 0000000000..7dba0b2c71 --- /dev/null +++ b/hw/display/virtio-dmabuf.c @@ -0,0 +1,90 @@ +/* + * Virtio Shared dma-buf + * + * Copyright Red Hat, Inc. 2023 + * + * Authors: + * Albert Esteve <aesteve@redhat.com> + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + */ + +#include "hw/virtio/virtio-dmabuf.h" + + +static GMutex lock; +static GHashTable *resource_uuids; + +/* + * uuid_equal_func: wrapper for UUID is_equal function to + * satisfy g_hash_table_new expected parameters signatures. + */ +static int uuid_equal_func(const void *lhv, const void *rhv) +{ + return qemu_uuid_is_equal(lhv, rhv); +} + +static bool virtio_add_resource(QemuUUID *uuid, gpointer value) +{ + assert(resource_uuids != NULL); + if (g_hash_table_lookup(resource_uuids, uuid) != NULL) { + return false; + } + + return g_hash_table_insert(resource_uuids, uuid, value); +} + +static gpointer virtio_lookup_resource(const QemuUUID *uuid) +{ + if (resource_uuids == NULL) { + return NULL; + } + + return g_hash_table_lookup(resource_uuids, uuid); +} + +bool virtio_add_dmabuf(QemuUUID *uuid, int udmabuf_fd) +{ + bool result; + if (udmabuf_fd < 0) { + return false; + } + g_mutex_lock(&lock); + if (resource_uuids == NULL) { + resource_uuids = g_hash_table_new(qemu_uuid_hash, uuid_equal_func); + } + result = virtio_add_resource(uuid, GINT_TO_POINTER(udmabuf_fd)); + g_mutex_unlock(&lock); + + return result; +} + +bool virtio_remove_resource(const QemuUUID *uuid) +{ + bool result; + g_mutex_lock(&lock); + result = g_hash_table_remove(resource_uuids, uuid); + g_mutex_unlock(&lock); + + return result; +} + +int virtio_lookup_dmabuf(const QemuUUID *uuid) +{ + g_mutex_lock(&lock); + gpointer lookup_res = virtio_lookup_resource(uuid); + g_mutex_unlock(&lock); + if (lookup_res == NULL) { + return -1; + } + + return GPOINTER_TO_INT(lookup_res); +} + +void virtio_free_resources(void) +{ + g_hash_table_destroy(resource_uuids); + /* Reference count shall be 0 after the implicit unref on destroy */ + resource_uuids = NULL; +} diff --git a/include/hw/virtio/virtio-dmabuf.h b/include/hw/virtio/virtio-dmabuf.h new file mode 100644 index 0000000000..4fdd394c4b --- /dev/null +++ b/include/hw/virtio/virtio-dmabuf.h @@ -0,0 +1,59 @@ +/* + * Virtio Shared dma-buf + * + * Copyright Red Hat, Inc. 2023 + * + * Authors: + * Albert Esteve <aesteve@redhat.com> + * + * This work is licensed under the terms of the GNU GPL, version 2. + * See the COPYING file in the top-level directory. + */ + +#ifndef VIRTIO_DMABUF_H +#define VIRTIO_DMABUF_H + +#include "qemu/osdep.h" + +#include <glib.h> +#include "qemu/uuid.h" + +/** + * virtio_add_dmabuf() - Add a new dma-buf resource to the lookup table + * @uuid: new resource's UUID + * @dmabuf_fd: the dma-buf descriptor that will be stored and shared with + * other virtio devices. The caller retains ownership over the + * descriptor and its lifecycle. + * + * Note: @dmabuf_fd must be a valid (non-negative) file descriptor. + * + * Return: true if the UUID did not exist and the resource has been added, + * false if another resource with the same UUID already existed. + * Note that if it finds a repeated UUID, the resource is not inserted in + * the lookup table. + */ +bool virtio_add_dmabuf(QemuUUID *uuid, int dmabuf_fd); + +/** + * virtio_remove_resource() - Removes a resource from the lookup table + * @uuid: resource's UUID + * + * Return: true if the UUID has been found and removed from the lookup table. + */ +bool virtio_remove_resource(const QemuUUID *uuid); + +/** + * virtio_lookup_dmabuf() - Looks for a dma-buf resource in the lookup table + * @uuid: resource's UUID + * + * Return: the dma-buf file descriptor integer, or -1 if the key is not found. + */ +int virtio_lookup_dmabuf(const QemuUUID *uuid); + +/** + * virtio_free_resources() - Destroys all keys and values of the shared + * resources lookup table, and frees them + */ +void virtio_free_resources(void); + +#endif /* VIRTIO_DMABUF_H */ diff --git a/tests/unit/meson.build b/tests/unit/meson.build index 93977cc32d..425ecc30fb 100644 --- a/tests/unit/meson.build +++ b/tests/unit/meson.build @@ -50,6 +50,7 @@ tests = { 'test-qapi-util': [], 'test-interval-tree': [], 'test-xs-node': [qom], + 'test-virtio-dmabuf': [meson.project_source_root() / 'hw/display/virtio-dmabuf.c'], } if have_system or have_tools diff --git a/tests/unit/test-virtio-dmabuf.c b/tests/unit/test-virtio-dmabuf.c new file mode 100644 index 0000000000..53436aa93d --- /dev/null +++ b/tests/unit/test-virtio-dmabuf.c @@ -0,0 +1,112 @@ +/* + * QEMU tests for shared dma-buf API + * + * Copyright (c) 2023 Red Hat, Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, see <http://www.gnu.org/licenses/>. + * + */ + +#include "qemu/osdep.h" +#include "hw/virtio/virtio-dmabuf.h" + + +static void test_add_remove_resources(void) +{ + QemuUUID uuid; + int i, dmabuf_fd; + + for (i = 0; i < 100; ++i) { + qemu_uuid_generate(&uuid); + dmabuf_fd = g_random_int_range(3, 500); + /* Add a new resource */ + g_assert(virtio_add_dmabuf(&uuid, dmabuf_fd)); + g_assert_cmpint(virtio_lookup_dmabuf(&uuid), ==, dmabuf_fd); + /* Remove the resource */ + g_assert(virtio_remove_resource(&uuid)); + /* Resource is not found anymore */ + g_assert_cmpint(virtio_lookup_dmabuf(&uuid), ==, -1); + } +} + +static void test_remove_invalid_resource(void) +{ + QemuUUID uuid; + int i; + + for (i = 0; i < 20; ++i) { + qemu_uuid_generate(&uuid); + g_assert_cmpint(virtio_lookup_dmabuf(&uuid), ==, -1); + /* Removing a resource that does not exist returns false */ + g_assert_false(virtio_remove_resource(&uuid)); + } +} + +static void test_add_invalid_resource(void) +{ + QemuUUID uuid; + int i, dmabuf_fd = -2, alt_dmabuf = 2; + + for (i = 0; i < 20; ++i) { + qemu_uuid_generate(&uuid); + /* Add a new resource with invalid (negative) resource fd */ + g_assert_false(virtio_add_dmabuf(&uuid, dmabuf_fd)); + /* Resource is not found */ + g_assert_cmpint(virtio_lookup_dmabuf(&uuid), ==, -1); + } + + for (i = 0; i < 20; ++i) { + /* Add a valid resource */ + qemu_uuid_generate(&uuid); + dmabuf_fd = g_random_int_range(3, 500); + g_assert(virtio_add_dmabuf(&uuid, dmabuf_fd)); + g_assert_cmpint(virtio_lookup_dmabuf(&uuid), ==, dmabuf_fd); + /* Add a new resource with repeated uuid returns false */ + g_assert_false(virtio_add_dmabuf(&uuid, alt_dmabuf)); + /* The value for the uuid key is not replaced */ + g_assert_cmpint(virtio_lookup_dmabuf(&uuid), ==, dmabuf_fd); + } +} + +static void test_free_resources(void) +{ + QemuUUID uuids[20]; + int i, dmabuf_fd; + + for (i = 0; i < ARRAY_SIZE(uuids); ++i) { + qemu_uuid_generate(&uuids[i]); + dmabuf_fd = g_random_int_range(3, 500); + g_assert(virtio_add_dmabuf(&uuids[i], dmabuf_fd)); + g_assert_cmpint(virtio_lookup_dmabuf(&uuids[i]), ==, dmabuf_fd); + } + virtio_free_resources(); + for (i = 0; i < ARRAY_SIZE(uuids); ++i) { + /* None of the resources is found after free'd */ + g_assert_cmpint(virtio_lookup_dmabuf(&uuids[i]), ==, -1); + } + +} + +int main(int argc, char **argv) +{ + g_test_init(&argc, &argv, NULL); + g_test_add_func("/virtio-dmabuf/add_rm_res", test_add_remove_resources); + g_test_add_func("/virtio-dmabuf/rm_invalid_res", + test_remove_invalid_resource); + g_test_add_func("/virtio-dmabuf/add_invalid_res", + test_add_invalid_resource); + g_test_add_func("/virtio-dmabuf/free_res", test_free_resources); + + return g_test_run(); +}
This API manages objects (in this iteration, dmabuf fds) that can be shared along different virtio devices. The API allows the different devices to add, remove and/or retrieve the objects by simply invoking the public functions that reside in the virtio-dmabuf file. Suggested-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Albert Esteve <aesteve@redhat.com> --- MAINTAINERS | 7 ++ hw/display/meson.build | 1 + hw/display/virtio-dmabuf.c | 90 ++++++++++++++++++++++++ include/hw/virtio/virtio-dmabuf.h | 59 ++++++++++++++++ tests/unit/meson.build | 1 + tests/unit/test-virtio-dmabuf.c | 112 ++++++++++++++++++++++++++++++ 6 files changed, 270 insertions(+) create mode 100644 hw/display/virtio-dmabuf.c create mode 100644 include/hw/virtio/virtio-dmabuf.h create mode 100644 tests/unit/test-virtio-dmabuf.c