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933b45da5d
Intents are nothing but pre-allocated buffers of appropriate size that are allocated on the local side and communicated to the remote side and the remote stores the list of intent ids that it is informed. Later when remote side is intenting to send data, it picks up a right intent (based on the size) and sends the data buffer and the intent id. Local side receives the data and copies it to the local intent buffer. The whole idea is to avoid stalls on the transport for allocating memory, used for copy based transports. When the remote request to allocate buffers using CMD_RX_INTENT_REQ, we allocate buffers of requested size, store the buffer id locally and also communicate the intent id to the remote. Acked-by: Arun Kumar Neelakantam <aneela@codeaurora.org> Signed-off-by: Sricharan R <sricharan@codeaurora.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
46 lines
1.4 KiB
C
46 lines
1.4 KiB
C
/*
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* Copyright (c) 2016-2017, Linaro Ltd
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef __QCOM_GLINK_NATIVE_H__
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#define __QCOM_GLINK_NATIVE_H__
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#define GLINK_FEATURE_INTENT_REUSE BIT(0)
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#define GLINK_FEATURE_MIGRATION BIT(1)
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#define GLINK_FEATURE_TRACER_PKT BIT(2)
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struct qcom_glink_pipe {
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size_t length;
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size_t (*avail)(struct qcom_glink_pipe *glink_pipe);
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void (*peak)(struct qcom_glink_pipe *glink_pipe, void *data,
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size_t count);
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void (*advance)(struct qcom_glink_pipe *glink_pipe, size_t count);
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void (*write)(struct qcom_glink_pipe *glink_pipe,
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const void *hdr, size_t hlen,
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const void *data, size_t dlen);
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};
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struct qcom_glink;
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struct qcom_glink *qcom_glink_native_probe(struct device *dev,
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unsigned long features,
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struct qcom_glink_pipe *rx,
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struct qcom_glink_pipe *tx,
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bool intentless);
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void qcom_glink_native_remove(struct qcom_glink *glink);
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void qcom_glink_native_unregister(struct qcom_glink *glink);
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#endif
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