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authorArun Kumar Neelakantam <aneela@codeaurora.org>2020-07-30 08:18:13 +0300
committerBjorn Andersson <bjorn.andersson@linaro.org>2021-10-15 18:35:20 +0300
commit8956927faed366b60b0355f4a4317a10e281ced7 (patch)
tree5aa68d5cc3b722b43ba125b80e5f501f31c30780 /drivers/rpmsg
parent63b8d79916672d35069962d87d1540c534cb2438 (diff)
downloadlinux-8956927faed366b60b0355f4a4317a10e281ced7.tar.xz
rpmsg: glink: Add TX_DATA_CONT command while sending
With current design the transport can send packets of size upto FIFO_SIZE which is 16k and return failure for all packets above 16k. Add TX_DATA_CONT command to send packets greater than 16k by splitting into 8K chunks. Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org> Signed-off-by: Deepak Kumar Singh <deesin@codeaurora.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/1596086296-28529-4-git-send-email-deesin@codeaurora.org
Diffstat (limited to 'drivers/rpmsg')
-rw-r--r--drivers/rpmsg/qcom_glink_native.c38
1 files changed, 34 insertions, 4 deletions
diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c
index c7b9de655080..c525f667286d 100644
--- a/drivers/rpmsg/qcom_glink_native.c
+++ b/drivers/rpmsg/qcom_glink_native.c
@@ -1271,6 +1271,8 @@ static int __qcom_glink_send(struct glink_channel *channel,
} __packed req;
int ret;
unsigned long flags;
+ int chunk_size = len;
+ int left_size = 0;
if (!glink->intentless) {
while (!intent) {
@@ -1304,18 +1306,46 @@ static int __qcom_glink_send(struct glink_channel *channel,
iid = intent->id;
}
+ if (wait && chunk_size > SZ_8K) {
+ chunk_size = SZ_8K;
+ left_size = len - chunk_size;
+ }
req.msg.cmd = cpu_to_le16(RPM_CMD_TX_DATA);
req.msg.param1 = cpu_to_le16(channel->lcid);
req.msg.param2 = cpu_to_le32(iid);
- req.chunk_size = cpu_to_le32(len);
- req.left_size = cpu_to_le32(0);
+ req.chunk_size = cpu_to_le32(chunk_size);
+ req.left_size = cpu_to_le32(left_size);
- ret = qcom_glink_tx(glink, &req, sizeof(req), data, len, wait);
+ ret = qcom_glink_tx(glink, &req, sizeof(req), data, chunk_size, wait);
/* Mark intent available if we failed */
- if (ret && intent)
+ if (ret && intent) {
intent->in_use = false;
+ return ret;
+ }
+ while (left_size > 0) {
+ data = (void *)((char *)data + chunk_size);
+ chunk_size = left_size;
+ if (chunk_size > SZ_8K)
+ chunk_size = SZ_8K;
+ left_size -= chunk_size;
+
+ req.msg.cmd = cpu_to_le16(RPM_CMD_TX_DATA_CONT);
+ req.msg.param1 = cpu_to_le16(channel->lcid);
+ req.msg.param2 = cpu_to_le32(iid);
+ req.chunk_size = cpu_to_le32(chunk_size);
+ req.left_size = cpu_to_le32(left_size);
+
+ ret = qcom_glink_tx(glink, &req, sizeof(req), data,
+ chunk_size, wait);
+
+ /* Mark intent available if we failed */
+ if (ret && intent) {
+ intent->in_use = false;
+ break;
+ }
+ }
return ret;
}