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/*
* PCIe Data Object Exchange
*
* Copyright (C) 2021 Avery Design Systems, Inc.
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#ifndef PCIE_DOE_H
#define PCIE_DOE_H
#include "qemu/range.h"
#include "qemu/typedefs.h"
#include "hw/register.h"
/*
* Reference:
* PCIe r6.0 - 7.9.24 Data Object Exchange Extended Capability
*/
/* Capabilities Register - r6.0 7.9.24.2 */
#define PCI_EXP_DOE_CAP 0x04
REG32(PCI_DOE_CAP_REG, 0)
FIELD(PCI_DOE_CAP_REG, INTR_SUPP, 0, 1)
FIELD(PCI_DOE_CAP_REG, DOE_INTR_MSG_NUM, 1, 11)
/* Control Register - r6.0 7.9.24.3 */
#define PCI_EXP_DOE_CTRL 0x08
REG32(PCI_DOE_CAP_CONTROL, 0)
FIELD(PCI_DOE_CAP_CONTROL, DOE_ABORT, 0, 1)
FIELD(PCI_DOE_CAP_CONTROL, DOE_INTR_EN, 1, 1)
FIELD(PCI_DOE_CAP_CONTROL, DOE_GO, 31, 1)
/* Status Register - r6.0 7.9.24.4 */
#define PCI_EXP_DOE_STATUS 0x0c
REG32(PCI_DOE_CAP_STATUS, 0)
FIELD(PCI_DOE_CAP_STATUS, DOE_BUSY, 0, 1)
FIELD(PCI_DOE_CAP_STATUS, DOE_INTR_STATUS, 1, 1)
FIELD(PCI_DOE_CAP_STATUS, DOE_ERROR, 2, 1)
FIELD(PCI_DOE_CAP_STATUS, DATA_OBJ_RDY, 31, 1)
/* Write Data Mailbox Register - r6.0 7.9.24.5 */
#define PCI_EXP_DOE_WR_DATA_MBOX 0x10
/* Read Data Mailbox Register - 7.9.xx.6 */
#define PCI_EXP_DOE_RD_DATA_MBOX 0x14
/* PCI-SIG defined Data Object Types - r6.0 Table 6-32 */
#define PCI_SIG_DOE_DISCOVERY 0x00
#define PCI_DOE_DW_SIZE_MAX (1 << 18)
#define PCI_DOE_PROTOCOL_NUM_MAX 256
#define DATA_OBJ_BUILD_HEADER1(v, p) (((p) << 16) | (v))
#define DATA_OBJ_LEN_MASK(len) ((len) & (PCI_DOE_DW_SIZE_MAX - 1))
typedef struct DOEHeader DOEHeader;
typedef struct DOEProtocol DOEProtocol;
typedef struct DOECap DOECap;
struct DOEHeader {
uint16_t vendor_id;
uint8_t data_obj_type;
uint8_t reserved;
uint32_t length;
} QEMU_PACKED;
/* Protocol infos and rsp function callback */
struct DOEProtocol {
uint16_t vendor_id;
uint8_t data_obj_type;
bool (*handle_request)(DOECap *);
};
struct DOECap {
/* Owner */
PCIDevice *pdev;
uint16_t offset;
struct {
bool intr;
uint16_t vec;
} cap;
struct {
bool abort;
bool intr;
bool go;
} ctrl;
struct {
bool busy;
bool intr;
bool error;
bool ready;
} status;
uint32_t *write_mbox;
uint32_t *read_mbox;
/* Mailbox position indicator */
uint32_t read_mbox_idx;
uint32_t read_mbox_len;
uint32_t write_mbox_len;
/* Protocols and its callback response */
DOEProtocol *protocols;
uint16_t protocol_num;
};
void pcie_doe_init(PCIDevice *pdev, DOECap *doe_cap, uint16_t offset,
DOEProtocol *protocols, bool intr, uint16_t vec);
void pcie_doe_fini(DOECap *doe_cap);
bool pcie_doe_read_config(DOECap *doe_cap, uint32_t addr, int size,
uint32_t *buf);
void pcie_doe_write_config(DOECap *doe_cap, uint32_t addr,
uint32_t val, int size);
uint32_t pcie_doe_build_protocol(DOEProtocol *p);
void *pcie_doe_get_write_mbox_ptr(DOECap *doe_cap);
void pcie_doe_set_rsp(DOECap *doe_cap, void *rsp);
uint32_t pcie_doe_get_obj_len(void *obj);
#endif /* PCIE_DOE_H */
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