1 /* SPDX-License-Identifier: GPL-2.0 */ 2 3 /* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved. 4 * Copyright (C) 2018-2020 Linaro Ltd. 5 */ 6 #ifndef _IPA_H_ 7 #define _IPA_H_ 8 9 #include <linux/types.h> 10 #include <linux/device.h> 11 #include <linux/notifier.h> 12 #include <linux/pm_wakeup.h> 13 14 #include "ipa_version.h" 15 #include "gsi.h" 16 #include "ipa_mem.h" 17 #include "ipa_qmi.h" 18 #include "ipa_endpoint.h" 19 #include "ipa_interrupt.h" 20 21 struct clk; 22 struct icc_path; 23 struct net_device; 24 struct platform_device; 25 26 struct ipa_clock; 27 struct ipa_smp2p; 28 struct ipa_interrupt; 29 30 /** 31 * struct ipa - IPA information 32 * @gsi: Embedded GSI structure 33 * @version: IPA hardware version 34 * @pdev: Platform device 35 * @modem_rproc: Remoteproc handle for modem subsystem 36 * @smp2p: SMP2P information 37 * @clock: IPA clocking information 38 * @suspend_ref: Whether clock reference preventing suspend taken 39 * @table_addr: DMA address of filter/route table content 40 * @table_virt: Virtual address of filter/route table content 41 * @interrupt: IPA Interrupt information 42 * @uc_loaded: true after microcontroller has reported it's ready 43 * @reg_addr: DMA address used for IPA register access 44 * @reg_virt: Virtual address used for IPA register access 45 * @mem_addr: DMA address of IPA-local memory space 46 * @mem_virt: Virtual address of IPA-local memory space 47 * @mem_offset: Offset from @mem_virt used for access to IPA memory 48 * @mem_size: Total size (bytes) of memory at @mem_virt 49 * @mem: Array of IPA-local memory region descriptors 50 * @zero_addr: DMA address of preallocated zero-filled memory 51 * @zero_virt: Virtual address of preallocated zero-filled memory 52 * @zero_size: Size (bytes) of preallocated zero-filled memory 53 * @wakeup_source: Wakeup source information 54 * @available: Bit mask indicating endpoints hardware supports 55 * @filter_map: Bit mask indicating endpoints that support filtering 56 * @initialized: Bit mask indicating endpoints initialized 57 * @set_up: Bit mask indicating endpoints set up 58 * @enabled: Bit mask indicating endpoints enabled 59 * @endpoint: Array of endpoint information 60 * @channel_map: Mapping of GSI channel to IPA endpoint 61 * @name_map: Mapping of IPA endpoint name to IPA endpoint 62 * @setup_complete: Flag indicating whether setup stage has completed 63 * @modem_state: State of modem (stopped, running) 64 * @modem_netdev: Network device structure used for modem 65 * @qmi: QMI information 66 */ 67 struct ipa { 68 struct gsi gsi; 69 enum ipa_version version; 70 struct platform_device *pdev; 71 struct rproc *modem_rproc; 72 struct ipa_smp2p *smp2p; 73 struct ipa_clock *clock; 74 atomic_t suspend_ref; 75 76 dma_addr_t table_addr; 77 __le64 *table_virt; 78 79 struct ipa_interrupt *interrupt; 80 bool uc_loaded; 81 82 dma_addr_t reg_addr; 83 void __iomem *reg_virt; 84 85 dma_addr_t mem_addr; 86 void *mem_virt; 87 u32 mem_offset; 88 u32 mem_size; 89 const struct ipa_mem *mem; 90 91 dma_addr_t zero_addr; 92 void *zero_virt; 93 size_t zero_size; 94 95 struct wakeup_source *wakeup_source; 96 97 /* Bit masks indicating endpoint state */ 98 u32 available; /* supported by hardware */ 99 u32 filter_map; 100 u32 initialized; 101 u32 set_up; 102 u32 enabled; 103 104 struct ipa_endpoint endpoint[IPA_ENDPOINT_MAX]; 105 struct ipa_endpoint *channel_map[GSI_CHANNEL_COUNT_MAX]; 106 struct ipa_endpoint *name_map[IPA_ENDPOINT_COUNT]; 107 108 bool setup_complete; 109 110 atomic_t modem_state; /* enum ipa_modem_state */ 111 struct net_device *modem_netdev; 112 struct ipa_qmi qmi; 113 }; 114 115 /** 116 * ipa_setup() - Perform IPA setup 117 * @ipa: IPA pointer 118 * 119 * IPA initialization is broken into stages: init; config; and setup. 120 * (These have inverses exit, deconfig, and teardown.) 121 * 122 * Activities performed at the init stage can be done without requiring 123 * any access to IPA hardware. Activities performed at the config stage 124 * require the IPA clock to be running, because they involve access 125 * to IPA registers. The setup stage is performed only after the GSI 126 * hardware is ready (more on this below). The setup stage allows 127 * the AP to perform more complex initialization by issuing "immediate 128 * commands" using a special interface to the IPA. 129 * 130 * This function, @ipa_setup(), starts the setup stage. 131 * 132 * In order for the GSI hardware to be functional it needs firmware to be 133 * loaded (in addition to some other low-level initialization). This early 134 * GSI initialization can be done either by Trust Zone on the AP or by the 135 * modem. 136 * 137 * If it's done by Trust Zone, the AP loads the GSI firmware and supplies 138 * it to Trust Zone to verify and install. When this completes, if 139 * verification was successful, the GSI layer is ready and ipa_setup() 140 * implements the setup phase of initialization. 141 * 142 * If the modem performs early GSI initialization, the AP needs to know 143 * when this has occurred. An SMP2P interrupt is used for this purpose, 144 * and receipt of that interrupt triggers the call to ipa_setup(). 145 */ 146 int ipa_setup(struct ipa *ipa); 147 148 #endif /* _IPA_H_ */ 149