From: Loic Poulain <loic.poulain@linaro.org>
To: kuba@kernel.org, davem@davemloft.net,
manivannan.sadhasivam@linaro.org, hemantk@codeaurora.org
Cc: netdev@vger.kernel.org, linux-arm-msm@vger.kernel.org,
bbhatt@codeaurora.org, willemdebruijn.kernel@gmail.com,
jhugo@codeaurora.org, Loic Poulain <loic.poulain@linaro.org>
Subject: [PATCH v8 1/2] bus: mhi: Add mhi_queue_is_full function
Date: Wed, 28 Oct 2020 17:34:57 +0100 [thread overview]
Message-ID: <1603902898-25233-1-git-send-email-loic.poulain@linaro.org> (raw)
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>
---
v1->v5: not part of the series
v6: Add this commit, used for stopping TX queue
v7: no change
v8: remove static change (up to the compiler)
drivers/bus/mhi/core/main.c | 11 +++++++++++
include/linux/mhi.h | 7 +++++++
2 files changed, 18 insertions(+)
diff --git a/drivers/bus/mhi/core/main.c b/drivers/bus/mhi/core/main.c
index a588eac..bab38d2 100644
--- a/drivers/bus/mhi/core/main.c
+++ b/drivers/bus/mhi/core/main.c
@@ -1173,6 +1173,17 @@ 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)
diff --git a/include/linux/mhi.h b/include/linux/mhi.h
index 9d67e75..f72c3a4 100644
--- a/include/linux/mhi.h
+++ b/include/linux/mhi.h
@@ -745,4 +745,11 @@ int mhi_queue_buf(struct mhi_device *mhi_dev, enum dma_data_direction dir,
int mhi_queue_skb(struct mhi_device *mhi_dev, enum dma_data_direction dir,
struct sk_buff *skb, size_t len, enum mhi_flags mflags);
+/**
+ * mhi_queue_is_full - Determine whether queueing new elements is possible
+ * @mhi_dev: Device associated with the channels
+ * @dir: DMA direction for the channel
+ */
+bool mhi_queue_is_full(struct mhi_device *mhi_dev, enum dma_data_direction dir);
+
#endif /* _MHI_H_ */
--
2.7.4
next reply other threads:[~2020-10-28 22:11 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-28 16:34 Loic Poulain [this message]
2020-10-28 16:34 ` [PATCH v8 2/2] net: Add mhi-net driver Loic Poulain
2020-10-30 8:13 ` Manivannan Sadhasivam
2020-10-30 9:27 ` Loic Poulain
2020-10-30 9:31 ` Manivannan Sadhasivam
2020-10-30 9:05 ` [PATCH v8 1/2] bus: mhi: Add mhi_queue_is_full function Manivannan Sadhasivam
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