libdrm: Add NVIDIA Tegra support

Add the libdrm_tegra helper library to encapsulate Tegra-specific
interfaces to the DRM.

Furthermore, Tegra is added to the list of supported chips in the
modetest and vbltest programs.

Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

6 files changed, 381 insertions, 0 deletions

diff --git a/tegra/.gitignore b/tegra/.gitignore
new file mode 100644
index 00000000..74cfe47a
--- /dev/null
+++ b/tegra/.gitignore
@@ -0,0 +1 @@
+libdrm_tegra.pc
diff --git a/tegra/Makefile.am b/tegra/Makefile.am
new file mode 100644
index 00000000..a6474879
--- /dev/null
+++ b/tegra/Makefile.am
@@ -0,0 +1,23 @@
+AM_CPPFLAGS = \
+	-I$(top_srcdir) \
+	-I$(top_srcdir)/include/drm
+
+AM_CFLAGS = \
+	@PTHREADSTUBS_CFLAGS@ \
+	$(VISIBILITY_CFLAGS) \
+	$(WARN_CFLAGS)
+
+libdrm_tegra_ladir = $(libdir)
+libdrm_tegra_la_LTLIBRARIES = libdrm_tegra.la
+libdrm_tegra_la_LDFLAGS = -version-number 0:0:0 -no-undefined
+libdrm_tegra_la_LIBADD = ../libdrm.la @PTHREADSTUBS_LIBS@
+
+libdrm_tegra_la_SOURCES = \
+	private.h \
+	tegra.c
+
+libdrm_tegraincludedir = ${includedir}/libdrm
+libdrm_tegrainclude_HEADERS = tegra.h
+
+pkgconfigdir = @pkgconfigdir@
+pkgconfig_DATA = libdrm_tegra.pc
diff --git a/tegra/libdrm_tegra.pc.in b/tegra/libdrm_tegra.pc.in
new file mode 100644
index 00000000..2e06f49c
--- /dev/null
+++ b/tegra/libdrm_tegra.pc.in
@@ -0,0 +1,11 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: libdrm_tegra
+Description: Userspace interface to Tegra kernel DRM services
+Version: @PACKAGE_VERSION@
+Libs: -L${libdir} -ldrm_tegra
+Cflags: -I${includedir} -I${includedir}/libdrm
+Requires.private: libdrm
diff --git a/tegra/private.h b/tegra/private.h
new file mode 100644
index 00000000..9b6bc939
--- /dev/null
+++ b/tegra/private.h
@@ -0,0 +1,51 @@
+/*
+ * Copyright © 2012, 2013 Thierry Reding
+ * Copyright © 2013 Erik Faye-Lund
+ * Copyright © 2014 NVIDIA Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __DRM_TEGRA_PRIVATE_H__
+#define __DRM_TEGRA_PRIVATE_H__ 1
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#include <libdrm.h>
+#include <xf86atomic.h>
+
+#include "tegra.h"
+
+struct drm_tegra {
+	bool close;
+	int fd;
+};
+
+struct drm_tegra_bo {
+	struct drm_tegra *drm;
+	uint32_t handle;
+	uint32_t offset;
+	uint32_t flags;
+	uint32_t size;
+	atomic_t ref;
+	void *map;
+};
+
+#endif /* __DRM_TEGRA_PRIVATE_H__ */
diff --git a/tegra/tegra.c b/tegra/tegra.c
new file mode 100644
index 00000000..ec5bf76c
--- /dev/null
+++ b/tegra/tegra.c
@@ -0,0 +1,248 @@
+/*
+ * Copyright © 2012, 2013 Thierry Reding
+ * Copyright © 2013 Erik Faye-Lund
+ * Copyright © 2014 NVIDIA Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
+#include <errno.h>
+#include <fcntl.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <sys/mman.h>
+
+#include <xf86drm.h>
+
+#include <tegra_drm.h>
+
+#include "private.h"
+
+static void drm_tegra_bo_free(struct drm_tegra_bo *bo)
+{
+	struct drm_tegra *drm = bo->drm;
+	struct drm_gem_close args;
+
+	if (bo->map)
+		munmap(bo->map, bo->size);
+
+	memset(&args, 0, sizeof(args));
+	args.handle = bo->handle;
+
+	drmIoctl(drm->fd, DRM_IOCTL_GEM_CLOSE, &args);
+
+	free(bo);
+}
+
+static int drm_tegra_wrap(struct drm_tegra **drmp, int fd, bool close)
+{
+	struct drm_tegra *drm;
+
+	if (fd < 0 || !drmp)
+		return -EINVAL;
+
+	drm = calloc(1, sizeof(*drm));
+	if (!drm)
+		return -ENOMEM;
+
+	drm->close = close;
+	drm->fd = fd;
+
+	*drmp = drm;
+
+	return 0;
+}
+
+drm_public
+int drm_tegra_new(struct drm_tegra **drmp, int fd)
+{
+	bool supported = false;
+	drmVersionPtr version;
+
+	version = drmGetVersion(fd);
+	if (!version)
+		return -ENOMEM;
+
+	if (!strncmp(version->name, "tegra", version->name_len))
+		supported = true;
+
+	drmFreeVersion(version);
+
+	if (!supported)
+		return -ENOTSUP;
+
+	return drm_tegra_wrap(drmp, fd, false);
+}
+
+drm_public
+void drm_tegra_close(struct drm_tegra *drm)
+{
+	if (!drm)
+		return;
+
+	if (drm->close)
+		close(drm->fd);
+
+	free(drm);
+}
+
+drm_public
+int drm_tegra_bo_new(struct drm_tegra_bo **bop, struct drm_tegra *drm,
+		     uint32_t flags, uint32_t size)
+{
+	struct drm_tegra_gem_create args;
+	struct drm_tegra_bo *bo;
+	int err;
+
+	if (!drm || size == 0 || !bop)
+		return -EINVAL;
+
+	bo = calloc(1, sizeof(*bo));
+	if (!bo)
+		return -ENOMEM;
+
+	atomic_set(&bo->ref, 1);
+	bo->flags = flags;
+	bo->size = size;
+	bo->drm = drm;
+
+	memset(&args, 0, sizeof(args));
+	args.flags = flags;
+	args.size = size;
+
+	err = drmCommandWriteRead(drm->fd, DRM_TEGRA_GEM_CREATE, &args,
+				  sizeof(args));
+	if (err < 0) {
+		err = -errno;
+		free(bo);
+		return err;
+	}
+
+	bo->handle = args.handle;
+
+	*bop = bo;
+
+	return 0;
+}
+
+drm_public
+int drm_tegra_bo_wrap(struct drm_tegra_bo **bop, struct drm_tegra *drm,
+		      uint32_t handle, uint32_t flags, uint32_t size)
+{
+	struct drm_tegra_bo *bo;
+
+	if (!drm || !bop)
+		return -EINVAL;
+
+	bo = calloc(1, sizeof(*bo));
+	if (!bo)
+		return -ENOMEM;
+
+	atomic_set(&bo->ref, 1);
+	bo->handle = handle;
+	bo->flags = flags;
+	bo->size = size;
+	bo->drm = drm;
+
+	*bop = bo;
+
+	return 0;
+}
+
+drm_public
+struct drm_tegra_bo *drm_tegra_bo_ref(struct drm_tegra_bo *bo)
+{
+	if (bo)
+		atomic_inc(&bo->ref);
+
+	return bo;
+}
+
+drm_public
+void drm_tegra_bo_unref(struct drm_tegra_bo *bo)
+{
+	if (bo && atomic_dec_and_test(&bo->ref))
+		drm_tegra_bo_free(bo);
+}
+
+drm_public
+int drm_tegra_bo_get_handle(struct drm_tegra_bo *bo, uint32_t *handle)
+{
+	if (!bo || !handle)
+		return -EINVAL;
+
+	*handle = bo->handle;
+
+	return 0;
+}
+
+drm_public
+int drm_tegra_bo_map(struct drm_tegra_bo *bo, void **ptr)
+{
+	struct drm_tegra *drm = bo->drm;
+
+	if (!bo->map) {
+		struct drm_tegra_gem_mmap args;
+		int err;
+
+		memset(&args, 0, sizeof(args));
+		args.handle = bo->handle;
+
+		err = drmCommandWriteRead(drm->fd, DRM_TEGRA_GEM_MMAP, &args,
+					  sizeof(args));
+		if (err < 0)
+			return -errno;
+
+		bo->offset = args.offset;
+
+		bo->map = mmap(0, bo->size, PROT_READ | PROT_WRITE, MAP_SHARED,
+			       drm->fd, bo->offset);
+		if (bo->map == MAP_FAILED) {
+			bo->map = NULL;
+			return -errno;
+		}
+	}
+
+	if (ptr)
+		*ptr = bo->map;
+
+	return 0;
+}
+
+drm_public
+int drm_tegra_bo_unmap(struct drm_tegra_bo *bo)
+{
+	if (!bo)
+		return -EINVAL;
+
+	if (!bo->map)
+		return 0;
+
+	if (munmap(bo->map, bo->size))
+		return -errno;
+
+	bo->map = NULL;
+
+	return 0;
+}
diff --git a/tegra/tegra.h b/tegra/tegra.h
new file mode 100644
index 00000000..ed29505d
--- /dev/null
+++ b/tegra/tegra.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright © 2012, 2013 Thierry Reding
+ * Copyright © 2013 Erik Faye-Lund
+ * Copyright © 2014 NVIDIA Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __DRM_TEGRA_H__
+#define __DRM_TEGRA_H__ 1
+
+#include <stdint.h>
+#include <stdlib.h>
+
+struct drm_tegra_bo;
+struct drm_tegra;
+
+int drm_tegra_new(struct drm_tegra **drmp, int fd);
+void drm_tegra_close(struct drm_tegra *drm);
+
+int drm_tegra_bo_new(struct drm_tegra_bo **bop, struct drm_tegra *drm,
+		     uint32_t flags, uint32_t size);
+int drm_tegra_bo_wrap(struct drm_tegra_bo **bop, struct drm_tegra *drm,
+		      uint32_t handle, uint32_t flags, uint32_t size);
+struct drm_tegra_bo *drm_tegra_bo_ref(struct drm_tegra_bo *bo);
+void drm_tegra_bo_unref(struct drm_tegra_bo *bo);
+int drm_tegra_bo_get_handle(struct drm_tegra_bo *bo, uint32_t *handle);
+int drm_tegra_bo_map(struct drm_tegra_bo *bo, void **ptr);
+int drm_tegra_bo_unmap(struct drm_tegra_bo *bo);
+
+#endif /* __DRM_TEGRA_H__ */