diff options
| author |   Jakub Kicinski <kuba@kernel.org> | 2021-01-29 19:40:25 -0800 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2021-01-29 19:40:52 -0800 |
| commit | 2bca263cdab1a3e0fce54bc2bdf1885c0cfe3195 (patch) | |
| tree | b333acd701d625c0d653ab54feac84f1f0851614 /drivers/bus | |
| parent | docs: networking: timestamping: fix section title markup (diff) | |
| parent | bus: mhi: core: Add helper API to return number of free TREs (diff) | |
| download | linux-dev-2bca263cdab1a3e0fce54bc2bdf1885c0cfe3195.tar.xz linux-dev-2bca263cdab1a3e0fce54bc2bdf1885c0cfe3195.zip | |
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.c | 12 |
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; |