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/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
* Copyright (C) 2019-2020 Linaro Ltd.
#ifndef _IPA_ENDPOINT_H_
#define _IPA_ENDPOINT_H_
#include <linux/types.h>
#include <linux/workqueue.h>
#include <linux/if_ether.h>
#include "gsi.h"
#include "ipa_reg.h"
struct net_device;
struct sk_buff;
struct ipa;
struct ipa_gsi_endpoint_data;
/* Non-zero granularity of counter used to implement aggregation timeout */
#define IPA_AGGR_GRANULARITY 500 /* microseconds */
enum ipa_endpoint_name {
IPA_ENDPOINT_COUNT, /* Number of names (not an index) */
#define IPA_ENDPOINT_MAX 32 /* Max supported by driver */
* 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)
* @data: Endpoint configuration data
* @trans_tre_max: Maximum number of TRE descriptors per transaction
* @evt_ring_id: GSI event ring used by the endpoint
* @netdev: Network device pointer, if endpoint uses one
* @replenish_enabled: Whether receive buffer replenishing is enabled
* @replenish_ready: Number of replenish transactions without doorbell
* @replenish_saved: Replenish requests held while disabled
* @replenish_backlog: Number of buffers needed to fill hardware queue
* @replenish_work: Work item used for repeated replenish failures
struct ipa_endpoint {
struct ipa *ipa;
enum gsi_ee_id ee_id;
u32 channel_id;
u32 endpoint_id;
bool toward_ipa;
const struct ipa_endpoint_config_data *data;
u32 trans_tre_max;
u32 evt_ring_id;
/* Net device this endpoint is associated with, if any */
struct net_device *netdev;
/* Receive buffer replenishing for RX endpoints */
bool replenish_enabled;
u32 replenish_ready;
atomic_t replenish_saved;
atomic_t replenish_backlog;
struct delayed_work replenish_work; /* global wq */
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);
u32 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 *ipa,
struct gsi_trans *trans);
void ipa_endpoint_trans_release(struct ipa_endpoint *ipa,
struct gsi_trans *trans);
#endif /* _IPA_ENDPOINT_H_ */