1 /* 2 * Copyright (c) 2020 Intel Corporation. 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 */ 6 7 #ifndef ZEPHYR_DRIVERS_VIRTUALIZATION_VIRT_IVSHMEM_H_ 8 #define ZEPHYR_DRIVERS_VIRTUALIZATION_VIRT_IVSHMEM_H_ 9 10 #include <zephyr/drivers/pcie/pcie.h> 11 12 #ifdef CONFIG_IVSHMEM_DOORBELL 13 #include <zephyr/drivers/pcie/msi.h> 14 #endif 15 16 #define PCIE_CONF_CMDSTAT_INTX_DISABLE 0x0400 17 #define PCIE_CONF_INTR_PIN(x) (((x) >> 8) & 0xFFu) 18 19 #define IVSHMEM_CFG_ID 0x00 20 #define IVSHMEM_CFG_NEXT_CAP 0x01 21 #define IVSHMEM_CFG_LENGTH 0x02 22 #define IVSHMEM_CFG_PRIV_CNTL 0x03 23 #define IVSHMEM_PRIV_CNTL_ONESHOT_INT BIT(0) 24 #define IVSHMEM_CFG_STATE_TAB_SZ 0x04 25 #define IVSHMEM_CFG_RW_SECTION_SZ 0x08 26 #define IVSHMEM_CFG_OUTPUT_SECTION_SZ 0x10 27 #define IVSHMEM_CFG_ADDRESS 0x18 28 29 #define IVSHMEM_INT_ENABLE BIT(0) 30 31 #define IVSHMEM_PCIE_REG_BAR_IDX 0 32 #define IVSHMEM_PCIE_MSI_X_BAR_IDX 1 33 #define IVSHMEM_PCIE_SHMEM_BAR_IDX 2 34 35 #define PCIE_INTX_PIN_MIN 1 36 #define PCIE_INTX_PIN_MAX 4 37 38 #define INTX_IRQ_UNUSED UINT32_MAX 39 40 struct ivshmem_param { 41 const struct device *dev; 42 struct k_poll_signal *signal; 43 uint8_t vector; 44 }; 45 46 struct ivshmem { 47 DEVICE_MMIO_RAM; 48 struct pcie_dev *pcie; 49 uintptr_t shmem; 50 size_t size; 51 #ifdef CONFIG_IVSHMEM_DOORBELL 52 msi_vector_t vectors[CONFIG_IVSHMEM_MSI_X_VECTORS]; 53 struct ivshmem_param params[CONFIG_IVSHMEM_MSI_X_VECTORS]; 54 uint16_t n_vectors; 55 #endif 56 #ifdef CONFIG_IVSHMEM_V2 57 bool ivshmem_v2; 58 uint32_t max_peers; 59 size_t rw_section_size; 60 size_t output_section_size; 61 uintptr_t state_table_shmem; 62 uintptr_t rw_section_shmem; 63 uintptr_t output_section_shmem[CONFIG_IVSHMEM_V2_MAX_PEERS]; 64 #endif 65 }; 66 67 struct ivshmem_reg { 68 uint32_t int_mask; 69 uint32_t int_status; 70 uint32_t iv_position; 71 uint32_t doorbell; 72 }; 73 74 #ifdef CONFIG_IVSHMEM_V2 75 76 struct ivshmem_v2_reg { 77 uint32_t id; 78 uint32_t max_peers; 79 uint32_t int_control; 80 uint32_t doorbell; 81 uint32_t state; 82 }; 83 84 struct ivshmem_cfg { 85 struct intx_info { 86 uint32_t irq; 87 uint32_t priority; 88 uint32_t flags; 89 } intx_info[PCIE_INTX_PIN_MAX]; 90 }; 91 92 #endif /* CONFIG_IVSHMEM_V2 */ 93 94 #define IVSHMEM_GEN_DOORBELL(i, v) ((i << 16) | (v & 0xFFFF)) 95 96 #endif /* ZEPHYR_DRIVERS_VIRTUALIZATION_VIRT_IVSHMEM_H_ */ 97
