1 /* 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright(c) 2019 Intel Corporation. All rights reserved. 5 * 6 * Author: Liam Girdwood <liam.r.girdwood@linux.intel.com> 7 */ 8 9 #ifndef IO_BRIDGE_H 10 #define IO_BRIDGE_H 11 12 #include <stdint.h> 13 14 #define QEMU_IO_DEBUG 0 15 16 /* IO type */ 17 #define QEMU_IO_TYPE_QEMU 0 18 #define QEMU_IO_TYPE_REG 1 19 #define QEMU_IO_TYPE_IRQ 2 20 #define QEMU_IO_TYPE_GDB 3 21 #define QEMU_IO_TYPE_PM 4 22 #define QEMU_IO_TYPE_DMA 5 23 #define QEMU_IO_TYPE_MEM 6 24 25 /* Global Message Reply */ 26 #define QEMU_IO_MSG_REPLY 0 27 28 /* Register Messages */ 29 #define QEMU_IO_MSG_REG32W 32 30 #define QEMU_IO_MSG_REG64W 33 31 #define QEMU_IO_MSG_REG32R 34 32 #define QEMU_IO_MSG_REG64R 35 33 34 /* IRQ Messages */ 35 #define QEMU_IO_MSG_IRQ 64 36 37 /* DMA Messages */ 38 #define QEMU_IO_DMA_REQ_NEW 96 39 #define QEMU_IO_DMA_REQ_READY 97 40 #define QEMU_IO_DMA_REQ_COMPLETE 98 41 42 /* DMA Direction - relative to msg sender */ 43 #define QEMU_IO_DMA_DIR_READ 256 44 #define QEMU_IO_DMA_DIR_WRITE 257 45 46 /* GDB Messages */ 47 #define QEMU_IO_GDB_STALL 128 48 #define QEMU_IO_GDB_CONT 129 49 #define QEMU_IO_GDB_STALL_RPLY 130 /* stall after reply */ 50 51 /* PM Messages */ 52 #define QEMU_IO_PM_S0 192 53 #define QEMU_IO_PM_S1 193 54 #define QEMU_IO_PM_S2 194 55 #define QEMU_IO_PM_S3 195 56 #define QEMU_IO_PM_D0 196 57 #define QEMU_IO_PM_D1 197 58 #define QEMU_IO_PM_D2 198 59 #define QEMU_IO_PM_D3 199 60 61 /* Common message header */ 62 struct qemu_io_msg { 63 uint16_t type; 64 uint16_t msg; 65 uint32_t size; 66 uint32_t id; 67 }; 68 69 /* Generic message reply */ 70 struct qemu_io_msg_reply { 71 struct qemu_io_msg hdr; 72 uint32_t reply; 73 }; 74 75 /* Register messages */ 76 struct qemu_io_msg_reg32 { 77 struct qemu_io_msg hdr; 78 uint32_t reg; 79 uint32_t val; 80 }; 81 82 struct qemu_io_msg_reg64 { 83 struct qemu_io_msg hdr; 84 uint64_t reg; 85 uint64_t val; 86 }; 87 88 /* IRQ Messages */ 89 struct qemu_io_msg_irq { 90 struct qemu_io_msg hdr; 91 uint32_t irq; 92 }; 93 94 /* PM Messages */ 95 struct qemu_io_msg_pm_state { 96 struct qemu_io_msg hdr; 97 }; 98 99 /* DMA Messages - same message used as reply */ 100 struct qemu_io_msg_dma32 { 101 struct qemu_io_msg hdr; 102 uint32_t direction; /* QEMU_IO_DMA_DIR_ */ 103 uint32_t reply; /* 0 or errno */ 104 uint32_t src; 105 uint32_t dest; 106 uint32_t size; 107 uint32_t dmac_id; 108 uint32_t chan_id; 109 uint64_t host_data; 110 uint64_t client_data; 111 }; 112 113 struct qemu_io_msg_dma64 { 114 struct qemu_io_msg hdr; 115 uint32_t direction; /* QEMU_IO_DMA_DIR_ */ 116 uint32_t reply; /* 0 or errno */ 117 uint64_t src; 118 uint64_t dest; 119 uint64_t size; 120 uint32_t dmac_id; 121 uint32_t chan_id; 122 uint64_t host_data; 123 uint64_t client_data; 124 }; 125 126 /* API calls for parent and child */ 127 int qemu_io_register_parent(const char *name, 128 int (*cb)(void *, struct qemu_io_msg *msg), 129 void *data); 130 int qemu_io_register_child(const char *name, 131 int (*cb)(void *, struct qemu_io_msg *msg), 132 void *data); 133 134 int qemu_io_send_msg(struct qemu_io_msg *msg); 135 int qemu_io_send_msg_reply(struct qemu_io_msg *msg); 136 137 int qemu_io_register_shm(const char *name, int region, size_t size, 138 void **addr); 139 int qemu_io_sync(int region, unsigned int offset, size_t length); 140 141 void qemu_io_free(void); 142 void qemu_io_free_shm(int region); 143 144 #endif 145
