Adding upstream version 2.4.120.upstream/2.4.120

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 354 insertions, 0 deletions

diff --git a/tegra/tegra.c b/tegra/tegra.c
new file mode 100644
index 0000000..6a51c43
--- /dev/null
+++ b/tegra/tegra.c
@@ -0,0 +1,354 @@
+/*
+ * 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.
+ */
+
+#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;
+
+    if (bo->map)
+        munmap(bo->map, bo->size);
+
+    drmCloseBufferHandle(drm->fd, bo->handle);
+
+    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(int fd, struct drm_tegra **drmp)
+{
+    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);
+}
+
+static struct drm_tegra_bo *drm_tegra_bo_alloc(struct drm_tegra *drm,
+                                               uint32_t handle,
+                                               uint32_t flags,
+                                               uint32_t size)
+{
+    struct drm_tegra_bo *bo;
+
+    bo = calloc(1, sizeof(*bo));
+    if (!bo)
+        return NULL;
+
+    atomic_set(&bo->ref, 1);
+    bo->handle = handle;
+    bo->flags = flags;
+    bo->size = size;
+    bo->drm = drm;
+
+    return bo;
+}
+
+drm_public int
+drm_tegra_bo_new(struct drm_tegra *drm, uint32_t flags, uint32_t size,
+                 struct drm_tegra_bo **bop)
+{
+    struct drm_tegra_gem_create args;
+    struct drm_tegra_bo *bo;
+    int err;
+
+    if (!drm || size == 0 || !bop)
+        return -EINVAL;
+
+    bo = drm_tegra_bo_alloc(drm, 0, flags, size);
+    if (!bo)
+        return -ENOMEM;
+
+    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 *drm, uint32_t handle, uint32_t flags,
+                  uint32_t size, struct drm_tegra_bo **bop)
+{
+    struct drm_tegra_bo *bo;
+
+    if (!drm || !bop)
+        return -EINVAL;
+
+    bo = drm_tegra_bo_alloc(drm, handle, flags, size);
+    if (!bo)
+        return -ENOMEM;
+
+    *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 = drm_mmap(NULL, 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;
+}
+
+drm_public int drm_tegra_bo_get_name(struct drm_tegra_bo *bo, uint32_t *name)
+{
+    struct drm_tegra *drm = bo->drm;
+    struct drm_gem_flink args;
+    int err;
+
+    memset(&args, 0, sizeof(args));
+    args.handle = bo->handle;
+
+    err = drmIoctl(drm->fd, DRM_IOCTL_GEM_FLINK, &args);
+    if (err < 0)
+        return err;
+
+    if (name)
+        *name = args.name;
+
+    return 0;
+}
+
+drm_public int
+drm_tegra_bo_open(struct drm_tegra *drm, uint32_t name, uint32_t flags,
+                  struct drm_tegra_bo **bop)
+{
+    struct drm_gem_open args;
+    struct drm_tegra_bo *bo;
+    int err;
+
+    bo = drm_tegra_bo_alloc(drm, 0, flags, 0);
+    if (!bo)
+        return -ENOMEM;
+
+    memset(&args, 0, sizeof(args));
+    args.name = name;
+
+    err = drmIoctl(drm->fd, DRM_IOCTL_GEM_OPEN, &args);
+    if (err < 0)
+        goto free;
+
+    bo->handle = args.handle;
+    bo->size = args.size;
+
+    *bop = bo;
+
+    return 0;
+
+free:
+    free(bo);
+    return err;
+}
+
+drm_public int drm_tegra_bo_export(struct drm_tegra_bo *bo, uint32_t flags)
+{
+    int fd, err;
+
+    flags |= DRM_CLOEXEC;
+
+    err = drmPrimeHandleToFD(bo->drm->fd, bo->handle, flags, &fd);
+    if (err < 0)
+        return err;
+
+    return fd;
+}
+
+static ssize_t fd_get_size(int fd)
+{
+    ssize_t size, offset;
+    int err;
+
+    offset = lseek(fd, 0, SEEK_CUR);
+    if (offset < 0)
+        return -errno;
+
+    size = lseek(fd, 0, SEEK_END);
+    if (size < 0)
+        return -errno;
+
+    err = lseek(fd, offset, SEEK_SET);
+    if (err < 0)
+        return -errno;
+
+    return size;
+}
+
+drm_public int
+drm_tegra_bo_import(struct drm_tegra *drm, int fd, struct drm_tegra_bo **bop)
+{
+    struct drm_tegra_bo *bo;
+    ssize_t size;
+    int err;
+
+    size = fd_get_size(fd);
+    if (size < 0)
+        return size;
+
+    bo = drm_tegra_bo_alloc(drm, 0, 0, size);
+    if (!bo)
+        return -ENOMEM;
+
+    err = drmPrimeFDToHandle(drm->fd, fd, &bo->handle);
+    if (err < 0)
+        goto free;
+
+    *bop = bo;
+
+    return 0;
+
+free:
+    free(bo);
+    return err;
+}