Modify the 'pad' member of struct drm_msm_gem_info to 'hint'. If the
user sets 'hint' to non-zero it means that they want a IOVA for the
GEM object instead of a mmap() offset. Return the iova in the 'offset'
member.
Signed-off-by: Jordan Crouse <jcrouse@xxxxxxxxxxxxxx>
---
drivers/gpu/drm/msm/msm_drv.c | 29 +++++++++++++++++++++++++----
include/uapi/drm/msm_drm.h | 4 ++--
2 files changed, 27 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index e29bb66..1e4e022 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -677,6 +677,17 @@ static int msm_ioctl_gem_cpu_fini(struct drm_device *dev, void *data,
return ret;
}
+static int msm_ioctl_gem_info_iova(struct drm_device *dev,
+ struct drm_gem_object *obj, uint64_t *iova)
+{
+ struct msm_drm_private *priv = dev->dev_private;
+
+ if (!priv->gpu)
+ return -EINVAL;
+
+ return msm_gem_get_iova(obj, priv->gpu->aspace, iova);
+}
+
static int msm_ioctl_gem_info(struct drm_device *dev, void *data,
struct drm_file *file)
{
@@ -684,14 +695,24 @@ static int msm_ioctl_gem_info(struct drm_device *dev, void *data,
struct drm_gem_object *obj;
int ret = 0;
- if (args->pad)
- return -EINVAL;
-
obj = drm_gem_object_lookup(file, args->handle);
if (!obj)
return -ENOENT;
- args->offset = msm_gem_mmap_offset(obj);
+ /*
+ * If the hint variable is set, it means that the user wants a IOVA for
+ * this buffer. Return the address from the GPU because that is
+ * probably what it is looking for
+ */
+ if (args->hint) {
+ uint64_t iova;
+
+ ret = msm_ioctl_gem_info_iova(dev, obj, &iova);
+ if (!ret)
+ args->offset = iova;
+ } else {
+ args->offset = msm_gem_mmap_offset(obj);
+ }
drm_gem_object_unreference_unlocked(obj);
diff --git a/include/uapi/drm/msm_drm.h b/include/uapi/drm/msm_drm.h
index 4d5d6a2..045ad20 100644
--- a/include/uapi/drm/msm_drm.h
+++ b/include/uapi/drm/msm_drm.h
@@ -105,8 +105,8 @@ struct drm_msm_gem_new {
struct drm_msm_gem_info {
__u32 handle; /* in */
- __u32 pad;
- __u64 offset; /* out, offset to pass to mmap() */
+ __u32 hint; /* in */
+ __u64 offset; /* out, mmap() offset if hint is 0, iova if 1 */
};
#define MSM_PREP_READ 0x01
--
1.9.1
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