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9654d8c462
Rather than tracking the number of receive buffer transactions that have been submitted without a doorbell, just track the total number of transactions that have been issued. Then ring the doorbell when that number modulo the replenish batch size is 0. The effect is roughly the same, but the new count is slightly more interesting, and this approach will someday allow the replenish batch size to be tuned at runtime. Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
127 lines
3.7 KiB
C
127 lines
3.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
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* Copyright (C) 2019-2020 Linaro Ltd.
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*/
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#ifndef _IPA_ENDPOINT_H_
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#define _IPA_ENDPOINT_H_
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#include <linux/types.h>
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#include <linux/workqueue.h>
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#include <linux/if_ether.h>
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#include "gsi.h"
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#include "ipa_reg.h"
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struct net_device;
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struct sk_buff;
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struct ipa;
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struct ipa_gsi_endpoint_data;
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/* Non-zero granularity of counter used to implement aggregation timeout */
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#define IPA_AGGR_GRANULARITY 500 /* microseconds */
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#define IPA_MTU ETH_DATA_LEN
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enum ipa_endpoint_name {
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IPA_ENDPOINT_AP_COMMAND_TX,
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IPA_ENDPOINT_AP_LAN_RX,
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IPA_ENDPOINT_AP_MODEM_TX,
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IPA_ENDPOINT_AP_MODEM_RX,
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IPA_ENDPOINT_MODEM_COMMAND_TX,
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IPA_ENDPOINT_MODEM_LAN_TX,
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IPA_ENDPOINT_MODEM_LAN_RX,
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IPA_ENDPOINT_MODEM_AP_TX,
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IPA_ENDPOINT_MODEM_AP_RX,
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IPA_ENDPOINT_MODEM_DL_NLO_TX,
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IPA_ENDPOINT_COUNT, /* Number of names (not an index) */
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};
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#define IPA_ENDPOINT_MAX 32 /* Max supported by driver */
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/**
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* enum ipa_replenish_flag: RX buffer replenish flags
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*
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* @IPA_REPLENISH_ENABLED: Whether receive buffer replenishing is enabled
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* @IPA_REPLENISH_ACTIVE: Whether replenishing is underway
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* @IPA_REPLENISH_COUNT: Number of defined replenish flags
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*/
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enum ipa_replenish_flag {
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IPA_REPLENISH_ENABLED,
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IPA_REPLENISH_ACTIVE,
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IPA_REPLENISH_COUNT, /* Number of flags (must be last) */
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};
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/**
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* struct ipa_endpoint - IPA endpoint information
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* @ipa: IPA pointer
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* @ee_id: Execution environmnent endpoint is associated with
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* @channel_id: GSI channel used by the endpoint
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* @endpoint_id: IPA endpoint number
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* @toward_ipa: Endpoint direction (true = TX, false = RX)
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* @data: Endpoint configuration data
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* @trans_tre_max: Maximum number of TRE descriptors per transaction
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* @evt_ring_id: GSI event ring used by the endpoint
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* @netdev: Network device pointer, if endpoint uses one
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* @replenish_flags: Replenishing state flags
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* @replenish_count: Total number of replenish transactions committed
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* @replenish_work: Work item used for repeated replenish failures
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*/
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struct ipa_endpoint {
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struct ipa *ipa;
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enum gsi_ee_id ee_id;
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u32 channel_id;
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u32 endpoint_id;
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bool toward_ipa;
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const struct ipa_endpoint_config_data *data;
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u32 trans_tre_max;
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u32 evt_ring_id;
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/* Net device this endpoint is associated with, if any */
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struct net_device *netdev;
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/* Receive buffer replenishing for RX endpoints */
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DECLARE_BITMAP(replenish_flags, IPA_REPLENISH_COUNT);
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u64 replenish_count;
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struct delayed_work replenish_work; /* global wq */
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};
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void ipa_endpoint_modem_hol_block_clear_all(struct ipa *ipa);
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void ipa_endpoint_modem_pause_all(struct ipa *ipa, bool enable);
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int ipa_endpoint_modem_exception_reset_all(struct ipa *ipa);
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int ipa_endpoint_skb_tx(struct ipa_endpoint *endpoint, struct sk_buff *skb);
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int ipa_endpoint_enable_one(struct ipa_endpoint *endpoint);
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void ipa_endpoint_disable_one(struct ipa_endpoint *endpoint);
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void ipa_endpoint_suspend_one(struct ipa_endpoint *endpoint);
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void ipa_endpoint_resume_one(struct ipa_endpoint *endpoint);
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void ipa_endpoint_suspend(struct ipa *ipa);
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void ipa_endpoint_resume(struct ipa *ipa);
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void ipa_endpoint_setup(struct ipa *ipa);
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void ipa_endpoint_teardown(struct ipa *ipa);
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int ipa_endpoint_config(struct ipa *ipa);
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void ipa_endpoint_deconfig(struct ipa *ipa);
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void ipa_endpoint_default_route_set(struct ipa *ipa, u32 endpoint_id);
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void ipa_endpoint_default_route_clear(struct ipa *ipa);
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u32 ipa_endpoint_init(struct ipa *ipa, u32 count,
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const struct ipa_gsi_endpoint_data *data);
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void ipa_endpoint_exit(struct ipa *ipa);
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void ipa_endpoint_trans_complete(struct ipa_endpoint *ipa,
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struct gsi_trans *trans);
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void ipa_endpoint_trans_release(struct ipa_endpoint *ipa,
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struct gsi_trans *trans);
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#endif /* _IPA_ENDPOINT_H_ */
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