/* SPDX-License-Identifier: GPL-2.0 */ /* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved. * Copyright (C) 2019-2024 Linaro Ltd. */ #ifndef _IPA_ENDPOINT_H_ #define _IPA_ENDPOINT_H_ #include <linux/types.h> #include <linux/workqueue.h> #include "ipa_reg.h" #include "ipa_version.h" struct net_device; struct sk_buff; struct gsi_trans; struct ipa; struct ipa_gsi_endpoint_data; /* Non-zero granularity of counter used to implement aggregation timeout */ #define IPA_AGGR_GRANULARITY … #define IPA_MTU … enum ipa_endpoint_name { … }; #define IPA_ENDPOINT_MAX … /** * struct ipa_endpoint_tx - Endpoint configuration for TX endpoints * @seq_type: primary packet processing sequencer type * @seq_rep_type: sequencer type for replication processing * @status_endpoint: endpoint to which status elements are sent * * The @status_endpoint is only valid if the endpoint's @status_enable * flag is set. */ struct ipa_endpoint_tx { … }; /** * struct ipa_endpoint_rx - Endpoint configuration for RX endpoints * @buffer_size: requested receive buffer size (bytes) * @pad_align: power-of-2 boundary to which packet payload is aligned * @aggr_time_limit: time before aggregation closes (microseconds) * @aggr_hard_limit: whether aggregation closes before or after boundary * @aggr_close_eof: whether aggregation closes on end-of-frame * @holb_drop: whether to drop packets to avoid head-of-line blocking * * The actual size of the receive buffer is rounded up if necessary * to be a power-of-2 number of pages. * * With each packet it transfers, the IPA hardware can perform certain * transformations of its packet data. One of these is adding pad bytes * to the end of the packet data so the result ends on a power-of-2 boundary. * * It is also able to aggregate multiple packets into a single receive buffer. * Aggregation is "open" while a buffer is being filled, and "closes" when * certain criteria are met. * * A time limit can be specified to close aggregation. Aggregation will be * closed if this period passes after data is first written into a receive * buffer. If not specified, no time limit is imposed. * * Insufficient space available in the receive buffer can close aggregation. * The aggregation byte limit defines the point (in units of 1024 bytes) in * the buffer where aggregation closes. With a "soft" aggregation limit, * aggregation closes when a packet written to the buffer *crosses* that * aggregation limit. With a "hard" aggregation limit, aggregation will * close *before* writing a packet that would cross that boundary. */ struct ipa_endpoint_rx { … }; /** * struct ipa_endpoint_config - IPA endpoint hardware configuration * @resource_group: resource group to assign endpoint to * @checksum: whether checksum offload is enabled * @qmap: whether endpoint uses QMAP protocol * @aggregation: whether endpoint supports aggregation * @status_enable: whether endpoint uses status elements * @dma_mode: whether endpoint operates in DMA mode * @dma_endpoint: peer endpoint, if operating in DMA mode * @tx: TX-specific endpoint information (see above) * @rx: RX-specific endpoint information (see above) */ struct ipa_endpoint_config { … }; /** * enum ipa_replenish_flag: RX buffer replenish flags * * @IPA_REPLENISH_ENABLED: Whether receive buffer replenishing is enabled * @IPA_REPLENISH_ACTIVE: Whether replenishing is underway * @IPA_REPLENISH_COUNT: Number of defined replenish flags */ enum ipa_replenish_flag { … }; /** * struct ipa_endpoint - IPA endpoint information * @ipa: IPA pointer * @ee_id: Execution environmnent endpoint is associated with * @channel_id: GSI channel used by the endpoint * @endpoint_id: IPA endpoint number * @toward_ipa: Endpoint direction (true = TX, false = RX) * @config: Default endpoint configuration * @skb_frag_max: Maximum allowed number of TX SKB fragments * @evt_ring_id: GSI event ring used by the endpoint * @netdev: Network device pointer, if endpoint uses one * @replenish_flags: Replenishing state flags * @replenish_count: Total number of replenish transactions committed * @replenish_work: Work item used for repeated replenish failures */ struct ipa_endpoint { … }; void ipa_endpoint_modem_hol_block_clear_all(struct ipa *ipa); void ipa_endpoint_modem_pause_all(struct ipa *ipa, bool enable); int ipa_endpoint_modem_exception_reset_all(struct ipa *ipa); int ipa_endpoint_skb_tx(struct ipa_endpoint *endpoint, struct sk_buff *skb); int ipa_endpoint_enable_one(struct ipa_endpoint *endpoint); void ipa_endpoint_disable_one(struct ipa_endpoint *endpoint); void ipa_endpoint_suspend_one(struct ipa_endpoint *endpoint); void ipa_endpoint_resume_one(struct ipa_endpoint *endpoint); void ipa_endpoint_suspend(struct ipa *ipa); void ipa_endpoint_resume(struct ipa *ipa); void ipa_endpoint_setup(struct ipa *ipa); void ipa_endpoint_teardown(struct ipa *ipa); int ipa_endpoint_config(struct ipa *ipa); void ipa_endpoint_deconfig(struct ipa *ipa); void ipa_endpoint_default_route_set(struct ipa *ipa, u32 endpoint_id); void ipa_endpoint_default_route_clear(struct ipa *ipa); int ipa_endpoint_init(struct ipa *ipa, u32 count, const struct ipa_gsi_endpoint_data *data); void ipa_endpoint_exit(struct ipa *ipa); void ipa_endpoint_trans_complete(struct ipa_endpoint *endpoint, struct gsi_trans *trans); void ipa_endpoint_trans_release(struct ipa_endpoint *endpoint, struct gsi_trans *trans); #endif /* _IPA_ENDPOINT_H_ */
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