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d21d1f33b1
We don't typically need much information about modem endpoints.
Normally we need to specify information about modem endpoints in
configuration data in only two cases:
- When a modem TX endpoint supports filtering
- When another endpoint's configuration refers to it
For the first case, the AP initializes the filter table, and must
know how many endpoints (AP and modem) support filtering. An
example of the second case is the AP->modem TX endpoint, which
defines the modem<-AP RX endpoint as its status endpoint.
There is one exception to this, and it's due to a hardware quirk.
For IPA v4.2 (only) there is a problem related to allocating GSI
channels. And to work around this, the AP allocates *all* GSI
channels at startup time--including those used by the modem.
Get rid of the configuration information for two endpoints not
required for the SDM845. SC7180 runs IPA v4.2, so we can't
eliminate any modem endpoint definitions there.
Two more minor changes:
- Reorder the members defined for the ipa_endpoint_name enumerated
type to match the order used in configuration data files when
defining endpoints.
- Add a new name, IPA_ENDPOINT_MODEM_DL_NLO_TX, which can be used
for IPA v4.5+.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
120 lines
3.6 KiB
C
120 lines
3.6 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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* 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_enabled: Whether receive buffer replenishing is enabled
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* @replenish_ready: Number of replenish transactions without doorbell
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* @replenish_saved: Replenish requests held while disabled
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* @replenish_backlog: Number of buffers needed to fill hardware queue
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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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bool replenish_enabled;
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u32 replenish_ready;
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atomic_t replenish_saved;
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atomic_t replenish_backlog;
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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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void ipa_endpoint_exit_one(struct ipa_endpoint *endpoint);
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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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