summaryrefslogtreecommitdiff
path: root/drivers/bus
diff options
context:
space:
mode:
authorLoic Poulain <loic.poulain@linaro.org>2020-11-03 20:23:53 +0300
committerJakub Kicinski <kuba@kernel.org>2020-11-06 03:54:01 +0300
commitd8c4a22363853e196497b06a8ee9be9773873a14 (patch)
tree48872e93240e08ae2cd9ed7bed33d1e2f65aa417 /drivers/bus
parent5aee9484df35033d1820382fa7b00efe32f10580 (diff)
downloadlinux-d8c4a22363853e196497b06a8ee9be9773873a14.tar.xz
bus: mhi: Add mhi_queue_is_full function
This function can be used by client driver to determine whether it's possible to queue new elements in a channel ring. Signed-off-by: Loic Poulain <loic.poulain@linaro.org> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Link: https://lore.kernel.org/r/1604424234-24446-1-git-send-email-loic.poulain@linaro.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/bus')
-rw-r--r--drivers/bus/mhi/core/main.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/bus/mhi/core/main.c b/drivers/bus/mhi/core/main.c
index 2cff5ddff225..ba9e721d61b7 100644
--- a/drivers/bus/mhi/core/main.c
+++ b/drivers/bus/mhi/core/main.c
@@ -1165,6 +1165,17 @@ int mhi_queue_buf(struct mhi_device *mhi_dev, enum dma_data_direction dir,
}
EXPORT_SYMBOL_GPL(mhi_queue_buf);
+bool mhi_queue_is_full(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 mhi_is_ring_full(mhi_cntrl, tre_ring);
+}
+EXPORT_SYMBOL_GPL(mhi_queue_is_full);
+
int mhi_send_cmd(struct mhi_controller *mhi_cntrl,
struct mhi_chan *mhi_chan,
enum mhi_cmd_type cmd)