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 rw_section_offset; 61 size_t output_section_size; 62 size_t output_section_offset; 63 #endif 64 }; 65 66 struct ivshmem_reg { 67 uint32_t int_mask; 68 uint32_t int_status; 69 uint32_t iv_position; 70 uint32_t doorbell; 71 }; 72 73 #ifdef CONFIG_IVSHMEM_V2 74 75 struct ivshmem_v2_reg { 76 uint32_t id; 77 uint32_t max_peers; 78 uint32_t int_control; 79 uint32_t doorbell; 80 uint32_t state; 81 }; 82 83 struct ivshmem_cfg { 84 struct intx_info { 85 uint32_t irq; 86 uint32_t priority; 87 uint32_t flags; 88 } intx_info[PCIE_INTX_PIN_MAX]; 89 }; 90 91 #endif /* CONFIG_IVSHMEM_V2 */ 92 93 #define IVSHMEM_GEN_DOORBELL(i, v) ((i << 16) | (v & 0xFFFF)) 94 95 #endif /* ZEPHYR_DRIVERS_VIRTUALIZATION_VIRT_IVSHMEM_H_ */ 96
