/*******************************************************************************
    Copyright (c) 2016-2021 NVidia Corporation

    Permission is hereby granted, free of charge, to any person obtaining a copy
    of this software and associated documentation files (the "Software"), to
    deal in the Software without restriction, including without limitation the
    rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
    sell copies of the Software, and to permit persons to whom the Software is
    furnished to do so, subject to the following conditions:

        The above copyright notice and this permission notice shall be
        included in all copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
    THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
    DEALINGS IN THE SOFTWARE.
*******************************************************************************/


#ifndef _NVSWITCH_EXPORT_H_
#define _NVSWITCH_EXPORT_H_

#ifdef __cplusplus
extern "C" {
#endif

#include "nv_stdarg.h"
#include "nvlink_common.h"
#include "ioctl_common_nvswitch.h"

#define NVSWITCH_DRIVER_NAME            "nvidia-nvswitch"

#define NVSWITCH_MAX_BARS               1

#define NVSWITCH_DEVICE_INSTANCE_MAX    64

#define PCI_CLASS_BRIDGE_NVSWITCH       0x0680

#ifndef PCI_VENDOR_ID_NVIDIA
#define PCI_VENDOR_ID_NVIDIA            0x10DE
#endif

#define PCI_ADDR_OFFSET_VENDOR          0
#define PCI_ADDR_OFFSET_DEVID           2

#define NVSWITCH_NSEC_PER_SEC           1000000000ULL

#define NVSWITCH_DBG_LEVEL_MMIO         0x0
#define NVSWITCH_DBG_LEVEL_INFO         0x1
#define NVSWITCH_DBG_LEVEL_SETUP        0x2
#define NVSWITCH_DBG_LEVEL_WARN         0x3
#define NVSWITCH_DBG_LEVEL_ERROR        0x4

#define NVSWITCH_LOG_BUFFER_SIZE         512

#define NVSWITCH_DMA_DIR_TO_SYSMEM      0
#define NVSWITCH_DMA_DIR_FROM_SYSMEM    1
#define NVSWITCH_DMA_DIR_BIDIRECTIONAL  2

#define NVSWITCH_I2C_CMD_READ               0
#define NVSWITCH_I2C_CMD_WRITE              1
#define NVSWITCH_I2C_CMD_SMBUS_READ         2
#define NVSWITCH_I2C_CMD_SMBUS_WRITE        3
#define NVSWITCH_I2C_CMD_SMBUS_QUICK_READ   4
#define NVSWITCH_I2C_CMD_SMBUS_QUICK_WRITE  5

typedef struct nvswitch_device nvswitch_device;
typedef struct NVSWITCH_CLIENT_EVENT NVSWITCH_CLIENT_EVENT;

/*
 * @Brief : The interface will check if the client's version is supported by the
 *          driver.
 *
 * @param[in] user_version        Version of the interface that the client is
 *                                compiled with.
 * @param[out] kernel_version     Version of the interface that the kernel driver
 *                                is compiled with. This information will be
 *                                filled even if the CTRL call returns
 *                                -NVL_ERR_NOT_SUPPORTED due to version mismatch.
 * @param[in] length              Version string buffer length
 *
 * @returns                       NVL_SUCCESS if the client is using compatible
 *                                interface.
 *                                -NVL_ERR_NOT_SUPPORTED if the client is using
 *                                incompatible interface.
 *                                Or, Other NVL_XXX status value.
 */
NvlStatus
nvswitch_lib_check_api_version
(
    const char *user_version,
    char *kernel_version,
    NvU32 length
);

/*
 * @Brief : Allocate a new nvswitch lib device instance.
 *
 * @Description : Creates and registers a new nvswitch device and registers
 *   with the nvlink library.  This only initializes software state,
 *   it does not initialize the hardware state.
 *
 * @param[in] pci_domain    pci domain of the device
 * @param[in] pci_bus       pci bus of the device
 * @param[in] pci_device    pci device of the device
 * @param[in] pci_func      pci function of the device
 * @param[in] device_id     pci device ID of the device
 * @param[in] os_handle     Device handle used to interact with OS layer
 * @param[in] os_instance   instance number of this device
 * @param[out] device       return device handle for interfacing with library
 *
 * @returns                 NVL_SUCCESS if the action succeeded
 *                          an NVL error code otherwise
 */
NvlStatus
nvswitch_lib_register_device
(
    NvU16 pci_domain,
    NvU8 pci_bus,
    NvU8 pci_device,
    NvU8 pci_func,
    NvU16 device_id,
    void *os_handle,
    NvU32 os_instance,
    nvswitch_device **device
);

/*
 * @Brief : Clean-up the software state for a nvswitch device.
 *
 * @Description :
 *
 * @param[in] device        device handle to destroy
 *
 * @returns                 none
 */
void
nvswitch_lib_unregister_device
(
    nvswitch_device *device
);

/*
 * @Brief : Initialize the hardware for a nvswitch device.
 *
 * @Description :
 *
 * @param[in] device        a reference to the device to initialize
 *
 * @returns                 NVL_SUCCESS if the action succeeded
 *                          -NVL_BAD_ARGS if bad arguments provided
 *                          -NVL_PCI_ERROR if bar info unable to be retrieved
 */
NvlStatus
nvswitch_lib_initialize_device
(
    nvswitch_device *device
);

/*
 * @Brief : Shutdown the hardware for a nvswitch device.
 *
 * @Description :
 *
 * @param[in] device        a reference to the device to initialize
 *
 * @returns                 NVL_SUCCESS if the action succeeded
 *                          -NVL_BAD_ARGS if bad arguments provided
 *                          -NVL_PCI_ERROR if bar info unable to be retrieved
 */
NvlStatus
nvswitch_lib_shutdown_device
(
    nvswitch_device *device
);

/*
 * @Brief Control call (ioctl) interface.
 *
 * @param[in] device        device to operate on
 * @param[in] cmd           Enumerated command to execute.
 * @param[in] params        Params structure to pass to the command.
 * @param[in] params_size   Size of the parameter structure.
 * @param[in] osPrivate     The private data structure for OS.
 *
 * @return                  NVL_SUCCESS on a successful command
 *                          -NVL_NOT_FOUND if target device unable to be found
 *                          -NVL_BAD_ARGS if an invalid cmd is provided
 *                          -NVL_BAD_ARGS if a null arg is provided
 *                          -NVL_ERR_GENERIC otherwise
 */
NvlStatus nvswitch_lib_ctrl
(
    nvswitch_device *device,
    NvU32 cmd,
    void *params,
    NvU64 size,
    void *osPrivate
);

/*
 * @Brief: Retrieve PCI information for a switch based from device instance
 *
 * @Description :
 *
 * @param[in]  lib_handle   device to query
 * @param[out] pciInfo      return pointer to nvswitch lib copy of device info
 */
void nvswitch_lib_get_device_info
(
    nvswitch_device *lib_handle,
    struct nvlink_pci_info **pciInfo
);

/*
 * @Brief: Retrieve BIOS version for an nvswitch device
 *
 * @Description: For devices with a BIOS, this retrieves the BIOS version.
 *
 * @param[in]  device  device to query
 * @param[out] version BIOS version is stored here
 *
 * @returns NVL_SUCCESS                 BIOS version was retrieved successfully
 *          -NVL_BAD_ARGS               an invalid device is provided
 *          -NVL_ERR_INVALID_STATE      an error occurred reading BIOS info
 *          -NVL_ERR_NOT_SUPPORTED      device doesn't support this feature
 */

NvlStatus
nvswitch_lib_get_bios_version
(
    nvswitch_device *device,
    NvU64 *version
);


/*
 * @Brief: Retrieve whether the device supports PCI pin interrupts
 *
 * @Description: Returns whether the device can use PCI pin IRQs
 *
 *
 * @returns NV_TRUE                 device can use PCI pin IRQs
 *          NV_FALSE                device cannot use PCI pin IRQs
 */

NvlStatus
nvswitch_lib_use_pin_irq
(
    nvswitch_device *device
);


/*
 * @Brief: Load platform information (emulation, simulation etc.).
 *
 * @param[in]  lib_handle   device
 *
 * @return                  NVL_SUCCESS on a successful command
 *                          -NVL_BAD_ARGS if an invalid device is provided
 */
NvlStatus nvswitch_lib_load_platform_info
(
    nvswitch_device *lib_handle
);

/*
 * @Brief : Enable interrupts for this device
 *
 * @Description :
 *
 * @param[in] device        device to enable
 *
 * @returns                 NVL_SUCCESS
 *                          -NVL_PCI_ERROR if there was a register access error
 */
void
nvswitch_lib_enable_interrupts
(
    nvswitch_device *device
);

/*
 * @Brief : Disable interrupts for this device
 *
 * @Description :
 *
 * @param[in] device        device to enable
 *
 * @returns                 NVL_SUCCESS
 *                          -NVL_PCI_ERROR if there was a register access error
 */
void
nvswitch_lib_disable_interrupts
(
    nvswitch_device *device
);

/*
 * @Brief : Check if interrupts are pending on this device
 *
 * @Description :
 *
 * @param[in] device        device to check
 *
 * @returns                 NVL_SUCCESS if there were no errors and interrupts were handled
 *                          -NVL_BAD_ARGS if bad arguments provided
 *                          -NVL_PCI_ERROR if there was a register access error
 *                          -NVL_MORE_PROCESSING_REQUIRED no interrupts were found for this device
 */
NvlStatus
nvswitch_lib_check_interrupts
(
    nvswitch_device *device
);

/*
 * @Brief : Services interrupts for this device
 *
 * @Description :
 *
 * @param[in] device        device to service
 *
 * @returns                 NVL_SUCCESS if there were no errors and interrupts were handled
 *                          -NVL_BAD_ARGS if bad arguments provided
 *                          -NVL_PCI_ERROR if there was a register access error
 *                          -NVL_MORE_PROCESSING_REQUIRED no interrupts were found for this device
 */
NvlStatus
nvswitch_lib_service_interrupts
(
    nvswitch_device *device
);

/*
 * @Brief : Get depth of error logs
 *
 * @Description :
 *
 * @param[in]  device       device to check
 *
 * @param[out] fatal        Count of fatal errors
 * @param[out] nonfatal     Count of non-fatal errors
 *
 * @returns                 NVL_SUCCESS if there were no errors and interrupts were handled
 *                          -NVL_NOT_FOUND if bad arguments provided
 */
NvlStatus
nvswitch_lib_get_log_count
(
    nvswitch_device *device,
    NvU32 *fatal, NvU32 *nonfatal
);

/*
 * @Brief : Periodic thread-based dispatcher for kernel functions
 *
 * @Description : Its purpose is to do any background subtasks (data collection, thermal
 * monitoring, etc.  These subtasks may need to run at varying intervals, and
 * may even wish to adjust their execution period based on other factors.
 * Each subtask's entry notes the last time it was executed and its desired
 * execution period.  This function returns back to the dispatcher the desired
 * time interval before it should be called again.
 *
 * @param[in] device          The device to run background tasks on
 *
 * @returns nsec interval to wait before the next call.
 */
NvU64
nvswitch_lib_deferred_task_dispatcher
(
    nvswitch_device *device
);

/*
 * @Brief : Perform post init tasks
 *
 * @Description : Any device initialization/tests which need the device to be
 * initialized to a sane state go here.
 *
 * @param[in] device    The device to run the post-init on
 *
 * @returns             returns NvlStatus code, see nvlink_errors.h
 */
NvlStatus
nvswitch_lib_post_init_device
(
    nvswitch_device *device
);

/*
 * @Brief : Perform post init tasks for a blacklisted device
 *
 * @Description : Any initialization tasks that should be run after a
 *                blacklisted item should go here.
 *
 * @param[in] device    The device to run the post-init-blacklist on
 *
 * @returns             void
 */
void
nvswitch_lib_post_init_blacklist_device
(
    nvswitch_device *device
);

/*
 * @Brief : Get the UUID of the device
 *
 * @Description : Copies out the device's UUID into the uuid field
 *
 * @param[in] device    The device to get the UUID from
 *
 * @param[out] uuid     A pointer to a uuid struct in which the UUID is written to
 *
 * @returns             void
 */
void
nvswitch_lib_get_uuid
(
    nvswitch_device *device,
    NvUuid *uuid
);

/*
 * @Brief : Get the Physical ID of the device
 *
 * @Description : Copies out the device's Physical ID into the phys_id field
 *
 * @param[in] device    The device to get the UUID from
 *
 * @param[out] phys_id  A pointer to a NvU32 which the physical ID is written to
 *
 * @returns             NVL_SUCCESS if successful
 *                      -NVL_BAD_ARGS if bad arguments provided
 */
NvlStatus
nvswitch_lib_get_physid
(
    nvswitch_device *device,
    NvU32 *phys_id
);

/*
 * @Brief : Read the Fabric State for a nvswitch device.
 *
 * @Description : Returns the Fabric State for the device
 *
 * @param[in] device        a reference to the device
 * @param[in] *ptrs         references to the fabric state
 *
 * @returns                 NVL_SUCCESS if the action succeeded
 *                          -NVL_BAD_ARGS if bad arguments provided
 */
NvlStatus
nvswitch_lib_read_fabric_state
(
    nvswitch_device *device,
    NVSWITCH_DEVICE_FABRIC_STATE *device_fabric_state,
    NVSWITCH_DEVICE_BLACKLIST_REASON *device_blacklist_reason,
    NVSWITCH_DRIVER_FABRIC_STATE *driver_fabric_state
);

/*
 * @Brief : Validates PCI device id
 *
 * @Description : Validates PCI device id
 *
 * @param[in] device    The device id to be validated
 *
 * @returns             True if device id is valid
 */
NvBool
nvswitch_lib_validate_device_id
(
    NvU32 device_id
);

/*
 * @Brief : Gets an event if it exists in the Event list
 *
 * @Description : Gets an event if it is in the Device's Client
 *                Event list
 *
 * @param[in]  device         Device to operate on
 * @param[in]  osPrivate      The private data structure for the OS
 * @param[out] ppClientEvent  Double pointer to client event
 *
 * @returns                  NVL_SUCCESS if client event found
 *                           -NVL_BAD_ARGS if bad arguments provided
 *                           -NVL_NOT_FOUND if no client event found
 */
NvlStatus
nvswitch_lib_get_client_event
(
    nvswitch_device *device,
    void *osPrivate,
    NVSWITCH_CLIENT_EVENT **ppClientEvent
);

/*
 * @Brief : Adds a single entry into the Event list
 *
 * @Description : Adds an entry into the front of the Device's
 *                Client Event List
 *
 * @param[in] device     Device to operate on
 * @param[in] osPrivate  The private data structure for OS
 * @param[in] pParams    The parameters for the client event
 *
 * @returns              NVL_SUCCESS if event added
 *                       -NVL_BAD_ARGS if bad arguments provided
 *                       -NVL_NO_MEM if allocation fails
 */
NvlStatus
nvswitch_lib_add_client_event
(
    nvswitch_device *device,
    void *osPrivate,
    NvU32 eventId
);

/*
 * @Brief : Removes entries from the Event list
 *
 * @Description : Removes the entries associated with osPrivate
 *                from the Device's Client Event List
 *
 * @param[in] device     Device to operate on
 * @param[in] osPrivate  The private data structure for OS
 *
 * @returns              NVL_SUCCESS if event removed
 */
NvlStatus
nvswitch_lib_remove_client_events
(
    nvswitch_device *device,
    void *osPrivate
);

/*
 * @Brief : Notifies all events with a matching event Id in the Client Event list
 *
 * @Description : Notifies all events with a matching event Id in the Client Event list
 *
 * @param[in] device     Device to operate on
 * @param[in] eventId    The event ID to notify
 *
 * @returns              NVL_SUCCESS if arguments are valid
 *                       -NVL_BAD_ARGS if bad arguments provided
 */
NvlStatus
nvswitch_lib_notify_client_events
(
    nvswitch_device *device,
    NvU32 eventId
);

/*
 * @Brief : Gets the number of valid I2C ports for the device
 *
 * @Description : Gets the number of valid I2C ports for the device
 *
 * @param[in]  device         Device to operate on
 * @param[out] numValidPorts  A pointer to the number of valid ports
 *
 * @returns              NVL_SUCCESS if successfuly
 *                       -NVL_BAD_ARGS if bad arguments provided
 */
NvlStatus
nvswitch_lib_get_num_valid_ports
(
    nvswitch_device *device,
    NvU32 *numValidPorts
);

/*
 * @Brief : Returns a boolean if the I2C interface is supported for the device
 *
 * @Description : Returns a boolean if the I2C interface is supported for the device
 *
 * @param[in]  device         Device to operate on
 *
 * @returns NV_TRUE           device can use the I2C interface
 *          NV_FALSE          device cannot use the I2C interface
 */
NvBool
nvswitch_lib_is_i2c_supported
(
    nvswitch_device *device
);

/*
 * @Brief : Performs an I2C transaction
 *
 * @Description : Performs an I2C transaction
 *
 * @param[in]  device         Device to operate on
 * @param[in]  port           Port to issue I2C transaction
 * @param[in]  type           Type of I2C transaction
 * @param[in]  addr           Device address to perform I2C transaction on
 * @param[in]  command        I2C command to perform on
 * @param[in]  len            Length of the I2C transaction message
 * @param[in/out] pData       A pointer to the buffer containing the input/output data
 *
 * @returns              NVL_SUCCESS if I2C transaction completes
 *                       -NVL_BAD_ARGS if bad arguments provided
 *                       -NVL_ERR_INVALID_STATE if something internal went wrong
 */
NvlStatus
nvswitch_lib_i2c_transfer
(
    nvswitch_device *device,
    NvU32 port,
    NvU8 type,
    NvU8 addr,
    NvU8 command,
    NvU32 len,
    NvU8 *pData
);

/*
 * Returns count of registered NvSwitch devices.
 */
NvU32
nvswitch_os_get_device_count
(
    void
);

/*
 * Get current time in nanoseconds
 * The time is since epoch time (midnight UTC of January 1, 1970)
 */
NvU64
nvswitch_os_get_platform_time
(
    void
);

#if (defined(_WIN32) || defined(_WIN64))
#define NVSWITCH_PRINT_ATTRIB(str, arg1)
#else
#define NVSWITCH_PRINT_ATTRIB(str, arg1)             \
    __attribute__ ((format (printf, (str), (arg1))))
#endif // (defined(_WIN32) || defined(_WIN64))

/*
 * printf wrapper
 */
void
NVSWITCH_PRINT_ATTRIB(2, 3)
nvswitch_os_print
(
    int         log_level,
    const char *pFormat,
    ...
);

/*
 * "Registry" interface for dword
 */
NvlStatus
nvswitch_os_read_registry_dword
(
    void *os_handle,
    const char *name,
    NvU32 *data
);

/*
 * "Registry" interface for binary data
 */
NvlStatus
nvswitch_os_read_registery_binary
(
    void *os_handle,
    const char *name,
    NvU8 *data,
    NvU32 length
);

NvBool
nvswitch_os_is_uuid_in_blacklist
(
    NvUuid *uuid
);


/*
 * Override platform/simulation settings for cases
 */
void
nvswitch_os_override_platform
(
    void *os_handle,
    NvBool *rtlsim
);

/*
 * Memory management interface
 */
NvlStatus
nvswitch_os_alloc_contig_memory
(
    void *os_handle,
    void **virt_addr,
    NvU32 size,
    NvBool force_dma32
);

void
nvswitch_os_free_contig_memory
(
    void *os_handle,
    void *virt_addr,
    NvU32 size
);

NvlStatus
nvswitch_os_map_dma_region
(
    void *os_handle,
    void *cpu_addr,
    NvU64 *dma_handle,
    NvU32 size,
    NvU32 direction
);

NvlStatus
nvswitch_os_unmap_dma_region
(
    void *os_handle,
    void *cpu_addr,
    NvU64 dma_handle,
    NvU32 size,
    NvU32 direction
);

NvlStatus
nvswitch_os_set_dma_mask
(
    void *os_handle,
    NvU32 dma_addr_width
);

NvlStatus
nvswitch_os_sync_dma_region_for_cpu
(
    void *os_handle,
    NvU64 dma_handle,
    NvU32 size,
    NvU32 direction
);

NvlStatus
nvswitch_os_sync_dma_region_for_device
(
    void *os_handle,
    NvU64 dma_handle,
    NvU32 size,
    NvU32 direction
);

void *
nvswitch_os_malloc
(
    NvLength size
);

void
nvswitch_os_free
(
    void *pMem
);

NvLength
nvswitch_os_strlen
(
    const char *str
);

char*
nvswitch_os_strncpy
(
    char *pDest,
    const char *pSrc,
    NvLength length
);

int
nvswitch_os_strncmp
(
    const char *s1,
    const char *s2,
    NvLength length
);

void *
nvswitch_os_memset
(
    void *pDest,
    int value,
    NvLength size
);

void *
nvswitch_os_memcpy
(
    void *pDest,
    const void *pSrc,
    NvLength size
);

int
nvswitch_os_memcmp
(
    const void *s1,
    const void *s2,
    NvLength size
);

/*
 * Memory read / write interface
 */
NvU32
nvswitch_os_mem_read32
(
    const volatile void * pAddress
);

void
nvswitch_os_mem_write32
(
    volatile void *pAddress,
    NvU32 data
);

NvU64
nvswitch_os_mem_read64
(
    const volatile void *pAddress
);

void
nvswitch_os_mem_write64
(
    volatile void *pAddress,
    NvU64 data
);

/*
 * Interface to write formatted output to sized buffer
 */
int
nvswitch_os_snprintf
(
    char *pString,
    NvLength size,
    const char *pFormat,
    ...
);

/*
 * Interface to write formatted output to sized buffer
 */
int
nvswitch_os_vsnprintf
(
    char *buf,
    NvLength size,
    const char *fmt,
    va_list arglist
);

/*
 * Debug assert and log interface
 */
void
nvswitch_os_assert_log
(
    int cond,
    const char *pFormat,
    ...
);

/*
 * Interface to sleep for specified milliseconds. Yields the CPU to scheduler.
 */
void
nvswitch_os_sleep
(
    unsigned int ms
);

NvlStatus
nvswitch_os_acquire_fabric_mgmt_cap
(
    void *osPrivate,
    NvU64 capDescriptor
);

int
nvswitch_os_is_fabric_manager
(
    void *osPrivate
);

int
nvswitch_os_is_admin
(
    void
);

NvlStatus
nvswitch_os_get_os_version
(
    NvU32 *pMajorVer,
    NvU32 *pMinorVer,
    NvU32 *pBuildNum
);

void
nvswitch_lib_smbpbi_log_sxid
(
    nvswitch_device *device,
    NvU32           sxid,
    const char      *pFormat,
    ...
);

/*!
 * @brief: OS Specific handling to add an event.
 */
NvlStatus
nvswitch_os_add_client_event
(
    void            *osHandle,
    void            *osPrivate,
    NvU32           eventId
);

/*!
 * @brief: OS specific handling to remove all events corresponding to osPrivate.
 */
NvlStatus
nvswitch_os_remove_client_event
(
    void            *osHandle,
    void            *osPrivate
);

/*!
 * @brief: OS specific handling to notify an event.
 */
NvlStatus
nvswitch_os_notify_client_event
(
    void *osHandle,
    void *osPrivate,
    NvU32 eventId
);

/*!
 * @brief: Gets OS specific support for the REGISTER_EVENTS ioctl
 */
NvlStatus
nvswitch_os_get_supported_register_events_params
(
    NvBool *bSupportsManyEvents,
    NvBool *bUserSuppliesOsData
);

#ifdef __cplusplus
}
#endif
#endif //_NVSWITCH_EXPORT_H_
