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Commit 74427bef authored by Arun Kumar Neelakantam's avatar Arun Kumar Neelakantam Committed by Chris Lew
Browse files

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.

CRs-Fixed: 2351375
Change-Id: Iba3bbb440aacc0d5f33d0e5d88a3be0a31179ee7
Signed-off-by: default avatarArun Kumar Neelakantam <aneela@codeaurora.org>
parent e8c2c2c1

drivers/rpmsg/qcom_glink_native.c

+33 −4
Original line number Diff line number Diff line
@@ -1451,6 +1451,8 @@ 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) {
@@ -1484,18 +1486,45 @@ 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) {

		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;

}