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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
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63b8d79916
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1 changed files with 34 additions and 4 deletions
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@ -1271,6 +1271,8 @@ static int __qcom_glink_send(struct glink_channel *channel,
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} __packed req;
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} __packed req;
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int ret;
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int ret;
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unsigned long flags;
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unsigned long flags;
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int chunk_size = len;
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int left_size = 0;
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if (!glink->intentless) {
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if (!glink->intentless) {
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while (!intent) {
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while (!intent) {
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@ -1304,18 +1306,46 @@ static int __qcom_glink_send(struct glink_channel *channel,
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iid = intent->id;
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iid = intent->id;
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}
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}
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if (wait && chunk_size > SZ_8K) {
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chunk_size = SZ_8K;
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left_size = len - chunk_size;
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}
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req.msg.cmd = cpu_to_le16(RPM_CMD_TX_DATA);
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req.msg.cmd = cpu_to_le16(RPM_CMD_TX_DATA);
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req.msg.param1 = cpu_to_le16(channel->lcid);
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req.msg.param1 = cpu_to_le16(channel->lcid);
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req.msg.param2 = cpu_to_le32(iid);
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req.msg.param2 = cpu_to_le32(iid);
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req.chunk_size = cpu_to_le32(len);
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req.chunk_size = cpu_to_le32(chunk_size);
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req.left_size = cpu_to_le32(0);
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req.left_size = cpu_to_le32(left_size);
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ret = qcom_glink_tx(glink, &req, sizeof(req), data, len, wait);
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ret = qcom_glink_tx(glink, &req, sizeof(req), data, chunk_size, wait);
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/* Mark intent available if we failed */
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/* Mark intent available if we failed */
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if (ret && intent)
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if (ret && intent) {
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intent->in_use = false;
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intent->in_use = false;
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return ret;
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}
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while (left_size > 0) {
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data = (void *)((char *)data + chunk_size);
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chunk_size = left_size;
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if (chunk_size > SZ_8K)
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chunk_size = SZ_8K;
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left_size -= chunk_size;
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req.msg.cmd = cpu_to_le16(RPM_CMD_TX_DATA_CONT);
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req.msg.param1 = cpu_to_le16(channel->lcid);
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req.msg.param2 = cpu_to_le32(iid);
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req.chunk_size = cpu_to_le32(chunk_size);
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req.left_size = cpu_to_le32(left_size);
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ret = qcom_glink_tx(glink, &req, sizeof(req), data,
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chunk_size, wait);
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/* Mark intent available if we failed */
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if (ret && intent) {
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intent->in_use = false;
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break;
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}
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}
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return ret;
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return ret;
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}
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}
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