From 87f12216d9268ed90e6114a22cbc3f53b0fd8457 Mon Sep 17 00:00:00 2001 From: Vivek Kasireddy Date: Wed, 26 May 2021 16:14:16 -0700 Subject: [PATCH] ui: Get the fd associated with udmabuf driver Try to open the udmabuf dev node for the first time or return the fd if the device was previously opened. Based-on-patch-by: Gerd Hoffmann Cc: Gerd Hoffmann Signed-off-by: Vivek Kasireddy Message-Id: <20210526231429.1045476-2-vivek.kasireddy@intel.com> [ kraxel: fixup fcntl.h include ] Signed-off-by: Gerd Hoffmann --- include/ui/console.h | 3 +++ ui/meson.build | 1 + ui/udmabuf.c | 40 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 44 insertions(+) create mode 100644 ui/udmabuf.c diff --git a/include/ui/console.h b/include/ui/console.h index ca3c7af6a6..b30b63976a 100644 --- a/include/ui/console.h +++ b/include/ui/console.h @@ -471,4 +471,7 @@ bool vnc_display_reload_certs(const char *id, Error **errp); /* input.c */ int index_from_key(const char *key, size_t key_length); +/* udmabuf.c */ +int udmabuf_fd(void); + #endif diff --git a/ui/meson.build b/ui/meson.build index b5aed14886..a3a187d633 100644 --- a/ui/meson.build +++ b/ui/meson.build @@ -12,6 +12,7 @@ softmmu_ss.add(files( 'kbd-state.c', 'keymaps.c', 'qemu-pixman.c', + 'udmabuf.c', )) softmmu_ss.add([spice_headers, files('spice-module.c')]) softmmu_ss.add(when: spice_protocol, if_true: files('vdagent.c')) diff --git a/ui/udmabuf.c b/ui/udmabuf.c new file mode 100644 index 0000000000..23abe1e7eb --- /dev/null +++ b/ui/udmabuf.c @@ -0,0 +1,40 @@ +/* + * udmabuf helper functions. + * + * 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 "qemu/osdep.h" +#include "qapi/error.h" +#include "ui/console.h" + +#ifdef CONFIG_LINUX + +#include +#include + +int udmabuf_fd(void) +{ + static bool first = true; + static int udmabuf; + + if (!first) { + return udmabuf; + } + first = false; + + udmabuf = open("/dev/udmabuf", O_RDWR); + if (udmabuf < 0) { + warn_report("open /dev/udmabuf: %s", strerror(errno)); + } + return udmabuf; +} + +#else + +int udmabuf_fd(void) +{ + return -1; +} + +#endif