diff options
Diffstat (limited to 'drivers/net/nfp/nfpcore/nfp_cpp.h')
| -rw-r--r-- | drivers/net/nfp/nfpcore/nfp_cpp.h | 781 |
1 files changed, 781 insertions, 0 deletions
diff --git a/drivers/net/nfp/nfpcore/nfp_cpp.h b/drivers/net/nfp/nfpcore/nfp_cpp.h new file mode 100644 index 00000000..1427954c --- /dev/null +++ b/drivers/net/nfp/nfpcore/nfp_cpp.h @@ -0,0 +1,781 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright(c) 2018 Netronome Systems, Inc. + * All rights reserved. + */ + +#ifndef __NFP_CPP_H__ +#define __NFP_CPP_H__ + +#include <rte_ethdev_pci.h> + +#include "nfp-common/nfp_platform.h" +#include "nfp-common/nfp_resid.h" + +struct nfp_cpp_mutex; + +/* + * NFP CPP handle + */ +struct nfp_cpp { + uint32_t model; + uint32_t interface; + uint8_t *serial; + int serial_len; + void *priv; + + /* Mutex cache */ + struct nfp_cpp_mutex *mutex_cache; + const struct nfp_cpp_operations *op; + + /* + * NFP-6xxx originating island IMB CPP Address Translation. CPP Target + * ID is index into array. Values are obtained at runtime from local + * island XPB CSRs. + */ + uint32_t imb_cat_table[16]; + + int driver_lock_needed; +}; + +/* + * NFP CPP device area handle + */ +struct nfp_cpp_area { + struct nfp_cpp *cpp; + char *name; + unsigned long long offset; + unsigned long size; + /* Here follows the 'priv' part of nfp_cpp_area. */ +}; + +/* + * NFP CPP operations structure + */ +struct nfp_cpp_operations { + /* Size of priv area in struct nfp_cpp_area */ + size_t area_priv_size; + + /* Instance an NFP CPP */ + int (*init)(struct nfp_cpp *cpp, struct rte_pci_device *dev); + + /* + * Free the bus. + * Called only once, during nfp_cpp_unregister() + */ + void (*free)(struct nfp_cpp *cpp); + + /* + * Initialize a new NFP CPP area + * NOTE: This is _not_ serialized + */ + int (*area_init)(struct nfp_cpp_area *area, + uint32_t dest, + unsigned long long address, + unsigned long size); + /* + * Clean up a NFP CPP area before it is freed + * NOTE: This is _not_ serialized + */ + void (*area_cleanup)(struct nfp_cpp_area *area); + + /* + * Acquire resources for a NFP CPP area + * Serialized + */ + int (*area_acquire)(struct nfp_cpp_area *area); + /* + * Release resources for a NFP CPP area + * Serialized + */ + void (*area_release)(struct nfp_cpp_area *area); + /* + * Return a void IO pointer to a NFP CPP area + * NOTE: This is _not_ serialized + */ + + void *(*area_iomem)(struct nfp_cpp_area *area); + + void *(*area_mapped)(struct nfp_cpp_area *area); + /* + * Perform a read from a NFP CPP area + * Serialized + */ + int (*area_read)(struct nfp_cpp_area *area, + void *kernel_vaddr, + unsigned long offset, + unsigned int length); + /* + * Perform a write to a NFP CPP area + * Serialized + */ + int (*area_write)(struct nfp_cpp_area *area, + const void *kernel_vaddr, + unsigned long offset, + unsigned int length); +}; + +/* + * This should be the only external function the transport + * module supplies + */ +const struct nfp_cpp_operations *nfp_cpp_transport_operations(void); + +/* + * Set the model id + * + * @param cpp NFP CPP operations structure + * @param model Model ID + */ +void nfp_cpp_model_set(struct nfp_cpp *cpp, uint32_t model); + +/* + * Set the private instance owned data of a nfp_cpp struct + * + * @param cpp NFP CPP operations structure + * @param interface Interface ID + */ +void nfp_cpp_interface_set(struct nfp_cpp *cpp, uint32_t interface); + +/* + * Set the private instance owned data of a nfp_cpp struct + * + * @param cpp NFP CPP operations structure + * @param serial NFP serial byte array + * @param len Length of the serial byte array + */ +int nfp_cpp_serial_set(struct nfp_cpp *cpp, const uint8_t *serial, + size_t serial_len); + +/* + * Set the private data of the nfp_cpp instance + * + * @param cpp NFP CPP operations structure + * @return Opaque device pointer + */ +void nfp_cpp_priv_set(struct nfp_cpp *cpp, void *priv); + +/* + * Return the private data of the nfp_cpp instance + * + * @param cpp NFP CPP operations structure + * @return Opaque device pointer + */ +void *nfp_cpp_priv(struct nfp_cpp *cpp); + +/* + * Get the privately allocated portion of a NFP CPP area handle + * + * @param cpp_area NFP CPP area handle + * @return Pointer to the private area, or NULL on failure + */ +void *nfp_cpp_area_priv(struct nfp_cpp_area *cpp_area); + +uint32_t __nfp_cpp_model_autodetect(struct nfp_cpp *cpp); + +/* + * NFP CPP core interface for CPP clients. + */ + +/* + * Open a NFP CPP handle to a CPP device + * + * @param[in] id 0-based ID for the CPP interface to use + * + * @return NFP CPP handle, or NULL on failure (and set errno accordingly). + */ +struct nfp_cpp *nfp_cpp_from_device_name(struct rte_pci_device *dev, + int driver_lock_needed); + +/* + * Free a NFP CPP handle + * + * @param[in] cpp NFP CPP handle + */ +void nfp_cpp_free(struct nfp_cpp *cpp); + +#define NFP_CPP_MODEL_INVALID 0xffffffff + +/* + * NFP_CPP_MODEL_CHIP_of - retrieve the chip ID from the model ID + * + * The chip ID is a 16-bit BCD+A-F encoding for the chip type. + * + * @param[in] model NFP CPP model id + * @return NFP CPP chip id + */ +#define NFP_CPP_MODEL_CHIP_of(model) (((model) >> 16) & 0xffff) + +/* + * NFP_CPP_MODEL_IS_6000 - Check for the NFP6000 family of devices + * + * NOTE: The NFP4000 series is considered as a NFP6000 series variant. + * + * @param[in] model NFP CPP model id + * @return true if model is in the NFP6000 family, false otherwise. + */ +#define NFP_CPP_MODEL_IS_6000(model) \ + ((NFP_CPP_MODEL_CHIP_of(model) >= 0x4000) && \ + (NFP_CPP_MODEL_CHIP_of(model) < 0x7000)) + +/* + * nfp_cpp_model - Retrieve the Model ID of the NFP + * + * @param[in] cpp NFP CPP handle + * @return NFP CPP Model ID + */ +uint32_t nfp_cpp_model(struct nfp_cpp *cpp); + +/* + * NFP Interface types - logical interface for this CPP connection 4 bits are + * reserved for interface type. + */ +#define NFP_CPP_INTERFACE_TYPE_INVALID 0x0 +#define NFP_CPP_INTERFACE_TYPE_PCI 0x1 +#define NFP_CPP_INTERFACE_TYPE_ARM 0x2 +#define NFP_CPP_INTERFACE_TYPE_RPC 0x3 +#define NFP_CPP_INTERFACE_TYPE_ILA 0x4 + +/* + * Construct a 16-bit NFP Interface ID + * + * Interface IDs consists of 4 bits of interface type, 4 bits of unit + * identifier, and 8 bits of channel identifier. + * + * The NFP Interface ID is used in the implementation of NFP CPP API mutexes, + * which use the MU Atomic CompareAndWrite operation - hence the limit to 16 + * bits to be able to use the NFP Interface ID as a lock owner. + * + * @param[in] type NFP Interface Type + * @param[in] unit Unit identifier for the interface type + * @param[in] channel Channel identifier for the interface unit + * @return Interface ID + */ +#define NFP_CPP_INTERFACE(type, unit, channel) \ + ((((type) & 0xf) << 12) | \ + (((unit) & 0xf) << 8) | \ + (((channel) & 0xff) << 0)) + +/* + * Get the interface type of a NFP Interface ID + * @param[in] interface NFP Interface ID + * @return NFP Interface ID's type + */ +#define NFP_CPP_INTERFACE_TYPE_of(interface) (((interface) >> 12) & 0xf) + +/* + * Get the interface unit of a NFP Interface ID + * @param[in] interface NFP Interface ID + * @return NFP Interface ID's unit + */ +#define NFP_CPP_INTERFACE_UNIT_of(interface) (((interface) >> 8) & 0xf) + +/* + * Get the interface channel of a NFP Interface ID + * @param[in] interface NFP Interface ID + * @return NFP Interface ID's channel + */ +#define NFP_CPP_INTERFACE_CHANNEL_of(interface) (((interface) >> 0) & 0xff) + +/* + * Retrieve the Interface ID of the NFP + * @param[in] cpp NFP CPP handle + * @return NFP CPP Interface ID + */ +uint16_t nfp_cpp_interface(struct nfp_cpp *cpp); + +/* + * Retrieve the NFP Serial Number (unique per NFP) + * @param[in] cpp NFP CPP handle + * @param[out] serial Pointer to reference the serial number array + * + * @return size of the NFP6000 serial number, in bytes + */ +int nfp_cpp_serial(struct nfp_cpp *cpp, const uint8_t **serial); + +/* + * Allocate a NFP CPP area handle, as an offset into a CPP ID + * @param[in] cpp NFP CPP handle + * @param[in] cpp_id NFP CPP ID + * @param[in] address Offset into the NFP CPP ID address space + * @param[in] size Size of the area to reserve + * + * @return NFP CPP handle, or NULL on failure (and set errno accordingly). + */ +struct nfp_cpp_area *nfp_cpp_area_alloc(struct nfp_cpp *cpp, uint32_t cpp_id, + unsigned long long address, + unsigned long size); + +/* + * Allocate a NFP CPP area handle, as an offset into a CPP ID, by a named owner + * @param[in] cpp NFP CPP handle + * @param[in] cpp_id NFP CPP ID + * @param[in] name Name of owner of the area + * @param[in] address Offset into the NFP CPP ID address space + * @param[in] size Size of the area to reserve + * + * @return NFP CPP handle, or NULL on failure (and set errno accordingly). + */ +struct nfp_cpp_area *nfp_cpp_area_alloc_with_name(struct nfp_cpp *cpp, + uint32_t cpp_id, + const char *name, + unsigned long long address, + unsigned long size); + +/* + * Free an allocated NFP CPP area handle + * @param[in] area NFP CPP area handle + */ +void nfp_cpp_area_free(struct nfp_cpp_area *area); + +/* + * Acquire the resources needed to access the NFP CPP area handle + * + * @param[in] area NFP CPP area handle + * + * @return 0 on success, -1 on failure (and set errno accordingly). + */ +int nfp_cpp_area_acquire(struct nfp_cpp_area *area); + +/* + * Release the resources needed to access the NFP CPP area handle + * + * @param[in] area NFP CPP area handle + */ +void nfp_cpp_area_release(struct nfp_cpp_area *area); + +/* + * Allocate, then acquire the resources needed to access the NFP CPP area handle + * @param[in] cpp NFP CPP handle + * @param[in] cpp_id NFP CPP ID + * @param[in] address Offset into the NFP CPP ID address space + * @param[in] size Size of the area to reserve + * + * @return NFP CPP handle, or NULL on failure (and set errno accordingly). + */ +struct nfp_cpp_area *nfp_cpp_area_alloc_acquire(struct nfp_cpp *cpp, + uint32_t cpp_id, + unsigned long long address, + unsigned long size); + +/* + * Release the resources, then free the NFP CPP area handle + * @param[in] area NFP CPP area handle + */ +void nfp_cpp_area_release_free(struct nfp_cpp_area *area); + +uint8_t *nfp_cpp_map_area(struct nfp_cpp *cpp, int domain, int target, + uint64_t addr, unsigned long size, + struct nfp_cpp_area **area); +/* + * Return an IO pointer to the beginning of the NFP CPP area handle. The area + * must be acquired with 'nfp_cpp_area_acquire()' before calling this operation. + * + * @param[in] area NFP CPP area handle + * + * @return Pointer to IO memory, or NULL on failure (and set errno accordingly). + */ +void *nfp_cpp_area_mapped(struct nfp_cpp_area *area); + +/* + * Read from a NFP CPP area handle into a buffer. The area must be acquired with + * 'nfp_cpp_area_acquire()' before calling this operation. + * + * @param[in] area NFP CPP area handle + * @param[in] offset Offset into the area + * @param[in] buffer Location of buffer to receive the data + * @param[in] length Length of the data to read + * + * @return bytes read on success, -1 on failure (and set errno accordingly). + * + */ +int nfp_cpp_area_read(struct nfp_cpp_area *area, unsigned long offset, + void *buffer, size_t length); + +/* + * Write to a NFP CPP area handle from a buffer. The area must be acquired with + * 'nfp_cpp_area_acquire()' before calling this operation. + * + * @param[in] area NFP CPP area handle + * @param[in] offset Offset into the area + * @param[in] buffer Location of buffer that holds the data + * @param[in] length Length of the data to read + * + * @return bytes written on success, -1 on failure (and set errno accordingly). + */ +int nfp_cpp_area_write(struct nfp_cpp_area *area, unsigned long offset, + const void *buffer, size_t length); + +/* + * nfp_cpp_area_iomem() - get IOMEM region for CPP area + * @area: CPP area handle + * + * Returns an iomem pointer for use with readl()/writel() style operations. + * + * NOTE: Area must have been locked down with an 'acquire'. + * + * Return: pointer to the area, or NULL + */ +void *nfp_cpp_area_iomem(struct nfp_cpp_area *area); + +/* + * Verify that IO can be performed on an offset in an area + * + * @param[in] area NFP CPP area handle + * @param[in] offset Offset into the area + * @param[in] size Size of region to validate + * + * @return 0 on success, -1 on failure (and set errno accordingly). + */ +int nfp_cpp_area_check_range(struct nfp_cpp_area *area, + unsigned long long offset, unsigned long size); + +/* + * Get the NFP CPP handle that is the parent of a NFP CPP area handle + * + * @param cpp_area NFP CPP area handle + * @return NFP CPP handle + */ +struct nfp_cpp *nfp_cpp_area_cpp(struct nfp_cpp_area *cpp_area); + +/* + * Get the name passed during allocation of the NFP CPP area handle + * + * @param cpp_area NFP CPP area handle + * @return Pointer to the area's name + */ +const char *nfp_cpp_area_name(struct nfp_cpp_area *cpp_area); + +/* + * Read a block of data from a NFP CPP ID + * + * @param[in] cpp NFP CPP handle + * @param[in] cpp_id NFP CPP ID + * @param[in] address Offset into the NFP CPP ID address space + * @param[in] kernel_vaddr Buffer to copy read data to + * @param[in] length Size of the area to reserve + * + * @return bytes read on success, -1 on failure (and set errno accordingly). + */ +int nfp_cpp_read(struct nfp_cpp *cpp, uint32_t cpp_id, + unsigned long long address, void *kernel_vaddr, size_t length); + +/* + * Write a block of data to a NFP CPP ID + * + * @param[in] cpp NFP CPP handle + * @param[in] cpp_id NFP CPP ID + * @param[in] address Offset into the NFP CPP ID address space + * @param[in] kernel_vaddr Buffer to copy write data from + * @param[in] length Size of the area to reserve + * + * @return bytes written on success, -1 on failure (and set errno accordingly). + */ +int nfp_cpp_write(struct nfp_cpp *cpp, uint32_t cpp_id, + unsigned long long address, const void *kernel_vaddr, + size_t length); + + + +/* + * Fill a NFP CPP area handle and offset with a value + * + * @param[in] area NFP CPP area handle + * @param[in] offset Offset into the NFP CPP ID address space + * @param[in] value 32-bit value to fill area with + * @param[in] length Size of the area to reserve + * + * @return bytes written on success, -1 on failure (and set errno accordingly). + */ +int nfp_cpp_area_fill(struct nfp_cpp_area *area, unsigned long offset, + uint32_t value, size_t length); + +/* + * Read a single 32-bit value from a NFP CPP area handle + * + * @param area NFP CPP area handle + * @param offset offset into NFP CPP area handle + * @param value output value + * + * The area must be acquired with 'nfp_cpp_area_acquire()' before calling this + * operation. + * + * NOTE: offset must be 32-bit aligned. + * + * @return 0 on success, or -1 on error (and set errno accordingly). + */ +int nfp_cpp_area_readl(struct nfp_cpp_area *area, unsigned long offset, + uint32_t *value); + +/* + * Write a single 32-bit value to a NFP CPP area handle + * + * @param area NFP CPP area handle + * @param offset offset into NFP CPP area handle + * @param value value to write + * + * The area must be acquired with 'nfp_cpp_area_acquire()' before calling this + * operation. + * + * NOTE: offset must be 32-bit aligned. + * + * @return 0 on success, or -1 on error (and set errno accordingly). + */ +int nfp_cpp_area_writel(struct nfp_cpp_area *area, unsigned long offset, + uint32_t value); + +/* + * Read a single 64-bit value from a NFP CPP area handle + * + * @param area NFP CPP area handle + * @param offset offset into NFP CPP area handle + * @param value output value + * + * The area must be acquired with 'nfp_cpp_area_acquire()' before calling this + * operation. + * + * NOTE: offset must be 64-bit aligned. + * + * @return 0 on success, or -1 on error (and set errno accordingly). + */ +int nfp_cpp_area_readq(struct nfp_cpp_area *area, unsigned long offset, + uint64_t *value); + +/* + * Write a single 64-bit value to a NFP CPP area handle + * + * @param area NFP CPP area handle + * @param offset offset into NFP CPP area handle + * @param value value to write + * + * The area must be acquired with 'nfp_cpp_area_acquire()' before calling this + * operation. + * + * NOTE: offset must be 64-bit aligned. + * + * @return 0 on success, or -1 on error (and set errno accordingly). + */ +int nfp_cpp_area_writeq(struct nfp_cpp_area *area, unsigned long offset, + uint64_t value); + +/* + * Write a single 32-bit value on the XPB bus + * + * @param cpp NFP CPP device handle + * @param xpb_tgt XPB target and address + * @param value value to write + * + * @return 0 on success, or -1 on failure (and set errno accordingly). + */ +int nfp_xpb_writel(struct nfp_cpp *cpp, uint32_t xpb_tgt, uint32_t value); + +/* + * Read a single 32-bit value from the XPB bus + * + * @param cpp NFP CPP device handle + * @param xpb_tgt XPB target and address + * @param value output value + * + * @return 0 on success, or -1 on failure (and set errno accordingly). + */ +int nfp_xpb_readl(struct nfp_cpp *cpp, uint32_t xpb_tgt, uint32_t *value); + +/* + * Modify bits of a 32-bit value from the XPB bus + * + * @param cpp NFP CPP device handle + * @param xpb_tgt XPB target and address + * @param mask mask of bits to alter + * @param value value to modify + * + * @return 0 on success, or -1 on failure (and set errno accordingly). + */ +int nfp_xpb_writelm(struct nfp_cpp *cpp, uint32_t xpb_tgt, uint32_t mask, + uint32_t value); + +/* + * Modify bits of a 32-bit value from the XPB bus + * + * @param cpp NFP CPP device handle + * @param xpb_tgt XPB target and address + * @param mask mask of bits to alter + * @param value value to monitor for + * @param timeout_us maximum number of us to wait (-1 for forever) + * + * @return >= 0 on success, or -1 on failure (and set errno accordingly). + */ +int nfp_xpb_waitlm(struct nfp_cpp *cpp, uint32_t xpb_tgt, uint32_t mask, + uint32_t value, int timeout_us); + +/* + * Read a 32-bit word from a NFP CPP ID + * + * @param cpp NFP CPP handle + * @param cpp_id NFP CPP ID + * @param address offset into the NFP CPP ID address space + * @param value output value + * + * @return 0 on success, or -1 on failure (and set errno accordingly). + */ +int nfp_cpp_readl(struct nfp_cpp *cpp, uint32_t cpp_id, + unsigned long long address, uint32_t *value); + +/* + * Write a 32-bit value to a NFP CPP ID + * + * @param cpp NFP CPP handle + * @param cpp_id NFP CPP ID + * @param address offset into the NFP CPP ID address space + * @param value value to write + * + * @return 0 on success, or -1 on failure (and set errno accordingly). + * + */ +int nfp_cpp_writel(struct nfp_cpp *cpp, uint32_t cpp_id, + unsigned long long address, uint32_t value); + +/* + * Read a 64-bit work from a NFP CPP ID + * + * @param cpp NFP CPP handle + * @param cpp_id NFP CPP ID + * @param address offset into the NFP CPP ID address space + * @param value output value + * + * @return 0 on success, or -1 on failure (and set errno accordingly). + */ +int nfp_cpp_readq(struct nfp_cpp *cpp, uint32_t cpp_id, + unsigned long long address, uint64_t *value); + +/* + * Write a 64-bit value to a NFP CPP ID + * + * @param cpp NFP CPP handle + * @param cpp_id NFP CPP ID + * @param address offset into the NFP CPP ID address space + * @param value value to write + * + * @return 0 on success, or -1 on failure (and set errno accordingly). + */ +int nfp_cpp_writeq(struct nfp_cpp *cpp, uint32_t cpp_id, + unsigned long long address, uint64_t value); + +/* + * Initialize a mutex location + + * The CPP target:address must point to a 64-bit aligned location, and will + * initialize 64 bits of data at the location. + * + * This creates the initial mutex state, as locked by this nfp_cpp_interface(). + * + * This function should only be called when setting up the initial lock state + * upon boot-up of the system. + * + * @param cpp NFP CPP handle + * @param target NFP CPP target ID + * @param address Offset into the address space of the NFP CPP target ID + * @param key_id Unique 32-bit value for this mutex + * + * @return 0 on success, or -1 on failure (and set errno accordingly). + */ +int nfp_cpp_mutex_init(struct nfp_cpp *cpp, int target, + unsigned long long address, uint32_t key_id); + +/* + * Create a mutex handle from an address controlled by a MU Atomic engine + * + * The CPP target:address must point to a 64-bit aligned location, and reserve + * 64 bits of data at the location for use by the handle. + * + * Only target/address pairs that point to entities that support the MU Atomic + * Engine's CmpAndSwap32 command are supported. + * + * @param cpp NFP CPP handle + * @param target NFP CPP target ID + * @param address Offset into the address space of the NFP CPP target ID + * @param key_id 32-bit unique key (must match the key at this location) + * + * @return A non-NULL struct nfp_cpp_mutex * on success, NULL on + * failure. + */ +struct nfp_cpp_mutex *nfp_cpp_mutex_alloc(struct nfp_cpp *cpp, int target, + unsigned long long address, + uint32_t key_id); + +/* + * Get the NFP CPP handle the mutex was created with + * + * @param mutex NFP mutex handle + * @return NFP CPP handle + */ +struct nfp_cpp *nfp_cpp_mutex_cpp(struct nfp_cpp_mutex *mutex); + +/* + * Get the mutex key + * + * @param mutex NFP mutex handle + * @return Mutex key + */ +uint32_t nfp_cpp_mutex_key(struct nfp_cpp_mutex *mutex); + +/* + * Get the mutex owner + * + * @param mutex NFP mutex handle + * @return Interface ID of the mutex owner + * + * NOTE: This is for debug purposes ONLY - the owner may change at any time, + * unless it has been locked by this NFP CPP handle. + */ +uint16_t nfp_cpp_mutex_owner(struct nfp_cpp_mutex *mutex); + +/* + * Get the mutex target + * + * @param mutex NFP mutex handle + * @return Mutex CPP target (ie NFP_CPP_TARGET_MU) + */ +int nfp_cpp_mutex_target(struct nfp_cpp_mutex *mutex); + +/* + * Get the mutex address + * + * @param mutex NFP mutex handle + * @return Mutex CPP address + */ +uint64_t nfp_cpp_mutex_address(struct nfp_cpp_mutex *mutex); + +/* + * Free a mutex handle - does not alter the lock state + * + * @param mutex NFP CPP Mutex handle + */ +void nfp_cpp_mutex_free(struct nfp_cpp_mutex *mutex); + +/* + * Lock a mutex handle, using the NFP MU Atomic Engine + * + * @param mutex NFP CPP Mutex handle + * + * @return 0 on success, or -1 on failure (and set errno accordingly). + */ +int nfp_cpp_mutex_lock(struct nfp_cpp_mutex *mutex); + +/* + * Unlock a mutex handle, using the NFP MU Atomic Engine + * + * @param mutex NFP CPP Mutex handle + * + * @return 0 on success, or -1 on failure (and set errno accordingly). + */ +int nfp_cpp_mutex_unlock(struct nfp_cpp_mutex *mutex); + +/* + * Attempt to lock a mutex handle, using the NFP MU Atomic Engine + * + * @param mutex NFP CPP Mutex handle + * @return 0 if the lock succeeded, -1 on failure (and errno set + * appropriately). + */ +int nfp_cpp_mutex_trylock(struct nfp_cpp_mutex *mutex); + +#endif /* !__NFP_CPP_H__ */ |