1 /* SPDX-License-Identifier: GPL-2.0 */ 2 3 /* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved. 4 * Copyright (C) 2019-2020 Linaro Ltd. 5 */ 6 #ifndef _IPA_ENDPOINT_H_ 7 #define _IPA_ENDPOINT_H_ 8 9 #include <linux/types.h> 10 #include <linux/workqueue.h> 11 #include <linux/if_ether.h> 12 13 #include "gsi.h" 14 #include "ipa_reg.h" 15 16 struct net_device; 17 struct sk_buff; 18 19 struct ipa; 20 struct ipa_gsi_endpoint_data; 21 22 /* Non-zero granularity of counter used to implement aggregation timeout */ 23 #define IPA_AGGR_GRANULARITY 500 /* microseconds */ 24 25 #define IPA_MTU ETH_DATA_LEN 26 27 enum ipa_endpoint_name { 28 IPA_ENDPOINT_AP_COMMAND_TX, 29 IPA_ENDPOINT_AP_LAN_RX, 30 IPA_ENDPOINT_AP_MODEM_TX, 31 IPA_ENDPOINT_AP_MODEM_RX, 32 IPA_ENDPOINT_MODEM_COMMAND_TX, 33 IPA_ENDPOINT_MODEM_LAN_TX, 34 IPA_ENDPOINT_MODEM_LAN_RX, 35 IPA_ENDPOINT_MODEM_AP_TX, 36 IPA_ENDPOINT_MODEM_AP_RX, 37 IPA_ENDPOINT_MODEM_DL_NLO_TX, 38 IPA_ENDPOINT_COUNT, /* Number of names (not an index) */ 39 }; 40 41 #define IPA_ENDPOINT_MAX 32 /* Max supported by driver */ 42 43 /** 44 * struct ipa_endpoint - IPA endpoint information 45 * @ipa: IPA pointer 46 * @ee_id: Execution environmnent endpoint is associated with 47 * @channel_id: GSI channel used by the endpoint 48 * @endpoint_id: IPA endpoint number 49 * @toward_ipa: Endpoint direction (true = TX, false = RX) 50 * @data: Endpoint configuration data 51 * @trans_tre_max: Maximum number of TRE descriptors per transaction 52 * @evt_ring_id: GSI event ring used by the endpoint 53 * @netdev: Network device pointer, if endpoint uses one 54 * @replenish_enabled: Whether receive buffer replenishing is enabled 55 * @replenish_ready: Number of replenish transactions without doorbell 56 * @replenish_saved: Replenish requests held while disabled 57 * @replenish_backlog: Number of buffers needed to fill hardware queue 58 * @replenish_work: Work item used for repeated replenish failures 59 */ 60 struct ipa_endpoint { 61 struct ipa *ipa; 62 enum gsi_ee_id ee_id; 63 u32 channel_id; 64 u32 endpoint_id; 65 bool toward_ipa; 66 const struct ipa_endpoint_config_data *data; 67 68 u32 trans_tre_max; 69 u32 evt_ring_id; 70 71 /* Net device this endpoint is associated with, if any */ 72 struct net_device *netdev; 73 74 /* Receive buffer replenishing for RX endpoints */ 75 bool replenish_enabled; 76 u32 replenish_ready; 77 atomic_t replenish_saved; 78 atomic_t replenish_backlog; 79 struct delayed_work replenish_work; /* global wq */ 80 }; 81 82 void ipa_endpoint_modem_hol_block_clear_all(struct ipa *ipa); 83 84 void ipa_endpoint_modem_pause_all(struct ipa *ipa, bool enable); 85 86 int ipa_endpoint_modem_exception_reset_all(struct ipa *ipa); 87 88 int ipa_endpoint_skb_tx(struct ipa_endpoint *endpoint, struct sk_buff *skb); 89 90 int ipa_endpoint_enable_one(struct ipa_endpoint *endpoint); 91 void ipa_endpoint_disable_one(struct ipa_endpoint *endpoint); 92 93 void ipa_endpoint_suspend_one(struct ipa_endpoint *endpoint); 94 void ipa_endpoint_resume_one(struct ipa_endpoint *endpoint); 95 96 void ipa_endpoint_suspend(struct ipa *ipa); 97 void ipa_endpoint_resume(struct ipa *ipa); 98 99 void ipa_endpoint_setup(struct ipa *ipa); 100 void ipa_endpoint_teardown(struct ipa *ipa); 101 102 int ipa_endpoint_config(struct ipa *ipa); 103 void ipa_endpoint_deconfig(struct ipa *ipa); 104 105 void ipa_endpoint_default_route_set(struct ipa *ipa, u32 endpoint_id); 106 void ipa_endpoint_default_route_clear(struct ipa *ipa); 107 108 u32 ipa_endpoint_init(struct ipa *ipa, u32 count, 109 const struct ipa_gsi_endpoint_data *data); 110 void ipa_endpoint_exit(struct ipa *ipa); 111 112 void ipa_endpoint_trans_complete(struct ipa_endpoint *ipa, 113 struct gsi_trans *trans); 114 void ipa_endpoint_trans_release(struct ipa_endpoint *ipa, 115 struct gsi_trans *trans); 116 117 #endif /* _IPA_ENDPOINT_H_ */ 118