zephyr/drivers/virtualization/virt_ivshmem.h

97 lines
2.1 KiB
C
Raw Permalink Normal View History

/*
* Copyright (c) 2020 Intel Corporation.
*
* SPDX-License-Identifier: Apache-2.0
*/
#ifndef ZEPHYR_DRIVERS_VIRTUALIZATION_VIRT_IVSHMEM_H_
#define ZEPHYR_DRIVERS_VIRTUALIZATION_VIRT_IVSHMEM_H_
#include <zephyr/drivers/pcie/pcie.h>
#ifdef CONFIG_IVSHMEM_DOORBELL
#include <zephyr/drivers/pcie/msi.h>
#endif
#define PCIE_CONF_CMDSTAT_INTX_DISABLE 0x0400
#define PCIE_CONF_INTR_PIN(x) (((x) >> 8) & 0xFFu)
#define IVSHMEM_CFG_ID 0x00
#define IVSHMEM_CFG_NEXT_CAP 0x01
#define IVSHMEM_CFG_LENGTH 0x02
#define IVSHMEM_CFG_PRIV_CNTL 0x03
#define IVSHMEM_PRIV_CNTL_ONESHOT_INT BIT(0)
#define IVSHMEM_CFG_STATE_TAB_SZ 0x04
#define IVSHMEM_CFG_RW_SECTION_SZ 0x08
#define IVSHMEM_CFG_OUTPUT_SECTION_SZ 0x10
#define IVSHMEM_CFG_ADDRESS 0x18
#define IVSHMEM_INT_ENABLE BIT(0)
#define IVSHMEM_PCIE_REG_BAR_IDX 0
#define IVSHMEM_PCIE_MSI_X_BAR_IDX 1
#define IVSHMEM_PCIE_SHMEM_BAR_IDX 2
#define PCIE_INTX_PIN_MIN 1
#define PCIE_INTX_PIN_MAX 4
#define INTX_IRQ_UNUSED UINT32_MAX
struct ivshmem_param {
const struct device *dev;
struct k_poll_signal *signal;
uint8_t vector;
};
struct ivshmem {
DEVICE_MMIO_RAM;
struct pcie_dev *pcie;
uintptr_t shmem;
size_t size;
#ifdef CONFIG_IVSHMEM_DOORBELL
msi_vector_t vectors[CONFIG_IVSHMEM_MSI_X_VECTORS];
struct ivshmem_param params[CONFIG_IVSHMEM_MSI_X_VECTORS];
uint16_t n_vectors;
#endif
#ifdef CONFIG_IVSHMEM_V2
bool ivshmem_v2;
uint32_t max_peers;
size_t rw_section_size;
size_t output_section_size;
uintptr_t state_table_shmem;
uintptr_t rw_section_shmem;
uintptr_t output_section_shmem[CONFIG_IVSHMEM_V2_MAX_PEERS];
#endif
};
struct ivshmem_reg {
uint32_t int_mask;
uint32_t int_status;
uint32_t iv_position;
uint32_t doorbell;
};
#ifdef CONFIG_IVSHMEM_V2
struct ivshmem_v2_reg {
uint32_t id;
uint32_t max_peers;
uint32_t int_control;
uint32_t doorbell;
uint32_t state;
};
struct ivshmem_cfg {
struct intx_info {
uint32_t irq;
uint32_t priority;
uint32_t flags;
} intx_info[PCIE_INTX_PIN_MAX];
};
#endif /* CONFIG_IVSHMEM_V2 */
#define IVSHMEM_GEN_DOORBELL(i, v) ((i << 16) | (v & 0xFFFF))
#endif /* ZEPHYR_DRIVERS_VIRTUALIZATION_VIRT_IVSHMEM_H_ */