6e96b1b1e2
Add support to handle receiving the zero copy data command. This will extract the device address and size from the header and validate that it is valid memory the device knows about through the memshare framework. This command expects the memory that is being passed between host and memshare has already been shared to the glink memshare list. Change-Id: Ic17035d415ea65d1062be2db9a7e2fb840b0e658 Signed-off-by: Chris Lew <quic_clew@quicinc.com>
72 lines
2.3 KiB
C
72 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2016-2017, Linaro Ltd
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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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#include <linux/rpmsg.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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#define GLINK_FEATURE_ZERO_COPY BIT(3)
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#define GLINK_FEATURE_ZERO_COPY_POOLS BIT(4)
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/**
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* rpmsg rx callback return definitions
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* @RPMSG_HANDLED: rpmsg user is done processing data, framework can free the
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* resources related to the buffer
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* @RPMSG_DEFER: rpmsg user is not done processing data, framework will hold
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* onto resources related to the buffer until rpmsg_rx_done is
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* called. User should check their endpoint to see if rx_done
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* is a supported operation.
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*/
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#define RPMSG_HANDLED 0
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#define RPMSG_DEFER 1
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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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unsigned int offset, 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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void (*reset)(struct qcom_glink_pipe *glink_pipe);
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};
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struct qcom_glink;
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extern const struct dev_pm_ops glink_native_pm_ops;
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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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int qcom_glink_native_start(struct qcom_glink *glink);
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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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/* These operations are temporarily exposing signal interfaces */
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int qcom_glink_get_signals(struct rpmsg_endpoint *ept);
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int qcom_glink_set_signals(struct rpmsg_endpoint *ept, u32 set, u32 clear);
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int qcom_glink_register_signals_cb(struct rpmsg_endpoint *ept,
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int (*signals_cb)(struct rpmsg_device *dev, void *priv, u32 old, u32 new));
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/* These operations are temporarily exposing deferred freeing interfaces */
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bool qcom_glink_rx_done_supported(struct rpmsg_endpoint *ept);
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int qcom_glink_rx_done(struct rpmsg_endpoint *ept, void *data);
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void *qcom_glink_prepare_da_for_cpu(u64 da, size_t len);
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#endif
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