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authorJakub Kicinski <kuba@kernel.org>2021-01-30 06:40:25 +0300
committerJakub Kicinski <kuba@kernel.org>2021-01-30 06:40:52 +0300
commit2bca263cdab1a3e0fce54bc2bdf1885c0cfe3195 (patch)
treeb333acd701d625c0d653ab54feac84f1f0851614 /drivers/bus
parent5daf83846cdb67a3ef0c17f9826738567598ed19 (diff)
parent87baa23e0236bc1c41ce744f524bf12dbe7fde66 (diff)
downloadlinux-2bca263cdab1a3e0fce54bc2bdf1885c0cfe3195.tar.xz
Merge branch 'mhi-net-immutable' of https://git.kernel.org/pub/scm/linux/kernel/git/mani/mhi
Needed by mhi-net patches. Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/bus')
-rw-r--r--drivers/bus/mhi/core/main.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/bus/mhi/core/main.c b/drivers/bus/mhi/core/main.c
index d34d7e90e38d..1202433ecf98 100644
--- a/drivers/bus/mhi/core/main.c
+++ b/drivers/bus/mhi/core/main.c
@@ -260,6 +260,18 @@ int mhi_destroy_device(struct device *dev, void *data)
return 0;
}
+int mhi_get_free_desc_count(struct mhi_device *mhi_dev,
+ enum dma_data_direction dir)
+{
+ struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
+ struct mhi_chan *mhi_chan = (dir == DMA_TO_DEVICE) ?
+ mhi_dev->ul_chan : mhi_dev->dl_chan;
+ struct mhi_ring *tre_ring = &mhi_chan->tre_ring;
+
+ return get_nr_avail_ring_elements(mhi_cntrl, tre_ring);
+}
+EXPORT_SYMBOL_GPL(mhi_get_free_desc_count);
+
void mhi_notify(struct mhi_device *mhi_dev, enum mhi_callback cb_reason)
{
struct mhi_driver *mhi_drv;