#include <stdint.h>
#include <stdbool.h>
+#include <rte_bitops.h>
#include <rte_compat.h>
/**
/** Catch-all callback data. */
#define RTE_GPU_CALLBACK_ANY_DATA ((void *)-1)
+/** Access variable as volatile. */
+#define RTE_GPU_VOLATILE(x) (*(volatile typeof(x) *)&(x))
+
/** Store device info. */
struct rte_gpu_info {
/** Unique identifier name. */
typedef void (rte_gpu_callback_t)(int16_t dev_id,
enum rte_gpu_event event, void *user_data);
+/** Memory where communication flag is allocated. */
+enum rte_gpu_comm_flag_type {
+ /** Allocate flag on CPU memory visible from device. */
+ RTE_GPU_COMM_FLAG_CPU = 0,
+};
+
+/** Communication flag to coordinate CPU with the device. */
+struct rte_gpu_comm_flag {
+ /** Device that will use the device flag. */
+ uint16_t dev_id;
+ /** Pointer to flag memory area. */
+ uint32_t *ptr;
+ /** Type of memory used to allocate the flag. */
+ enum rte_gpu_comm_flag_type mtype;
+};
+
/**
* @warning
* @b EXPERIMENTAL: this API may change without prior notice.
__rte_experimental
int rte_gpu_info_get(int16_t dev_id, struct rte_gpu_info *info);
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Allocate a chunk of memory in the device.
+ *
+ * @param dev_id
+ * Device ID requiring allocated memory.
+ * @param size
+ * Number of bytes to allocate.
+ * Requesting 0 will do nothing.
+ *
+ * @return
+ * A pointer to the allocated memory, otherwise NULL and rte_errno is set:
+ * - ENODEV if invalid dev_id
+ * - EINVAL if reserved flags
+ * - ENOTSUP if operation not supported by the driver
+ * - E2BIG if size is higher than limit
+ * - ENOMEM if out of space
+ * - EPERM if driver error
+ */
+__rte_experimental
+void *rte_gpu_mem_alloc(int16_t dev_id, size_t size)
+__rte_alloc_size(2);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Deallocate a chunk of memory allocated with rte_gpu_mem_alloc().
+ *
+ * @param dev_id
+ * Reference device ID.
+ * @param ptr
+ * Pointer to the memory area to be deallocated.
+ * NULL is a no-op accepted value.
+ *
+ * @return
+ * 0 on success, -rte_errno otherwise:
+ * - ENODEV if invalid dev_id
+ * - ENOTSUP if operation not supported by the driver
+ * - EPERM if driver error
+ */
+__rte_experimental
+int rte_gpu_mem_free(int16_t dev_id, void *ptr);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Register a chunk of memory on the CPU usable by the device.
+ *
+ * @param dev_id
+ * Device ID requiring allocated memory.
+ * @param size
+ * Number of bytes to allocate.
+ * Requesting 0 will do nothing.
+ * @param ptr
+ * Pointer to the memory area to be registered.
+ * NULL is a no-op accepted value.
+
+ * @return
+ * A pointer to the allocated memory, otherwise NULL and rte_errno is set:
+ * - ENODEV if invalid dev_id
+ * - EINVAL if reserved flags
+ * - ENOTSUP if operation not supported by the driver
+ * - E2BIG if size is higher than limit
+ * - ENOMEM if out of space
+ * - EPERM if driver error
+ */
+__rte_experimental
+int rte_gpu_mem_register(int16_t dev_id, size_t size, void *ptr);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Deregister a chunk of memory previously registered with rte_gpu_mem_register()
+ *
+ * @param dev_id
+ * Reference device ID.
+ * @param ptr
+ * Pointer to the memory area to be unregistered.
+ * NULL is a no-op accepted value.
+ *
+ * @return
+ * 0 on success, -rte_errno otherwise:
+ * - ENODEV if invalid dev_id
+ * - ENOTSUP if operation not supported by the driver
+ * - EPERM if driver error
+ */
+__rte_experimental
+int rte_gpu_mem_unregister(int16_t dev_id, void *ptr);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Enforce a GPU write memory barrier.
+ *
+ * @param dev_id
+ * Reference device ID.
+ *
+ * @return
+ * 0 on success, -rte_errno otherwise:
+ * - ENODEV if invalid dev_id
+ * - ENOTSUP if operation not supported by the driver
+ * - EPERM if driver error
+ */
+__rte_experimental
+int rte_gpu_wmb(int16_t dev_id);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Create a communication flag that can be shared
+ * between CPU threads and device workload to exchange some status info
+ * (e.g. work is done, processing can start, etc..).
+ *
+ * @param dev_id
+ * Reference device ID.
+ * @param devflag
+ * Pointer to the memory area of the devflag structure.
+ * @param mtype
+ * Type of memory to allocate the communication flag.
+ *
+ * @return
+ * 0 on success, -rte_errno otherwise:
+ * - ENODEV if invalid dev_id
+ * - EINVAL if invalid inputs
+ * - ENOTSUP if operation not supported by the driver
+ * - ENOMEM if out of space
+ * - EPERM if driver error
+ */
+__rte_experimental
+int rte_gpu_comm_create_flag(uint16_t dev_id,
+ struct rte_gpu_comm_flag *devflag,
+ enum rte_gpu_comm_flag_type mtype);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Deallocate a communication flag.
+ *
+ * @param devflag
+ * Pointer to the memory area of the devflag structure.
+ *
+ * @return
+ * 0 on success, -rte_errno otherwise:
+ * - ENODEV if invalid dev_id
+ * - EINVAL if NULL devflag
+ * - ENOTSUP if operation not supported by the driver
+ * - EPERM if driver error
+ */
+__rte_experimental
+int rte_gpu_comm_destroy_flag(struct rte_gpu_comm_flag *devflag);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Set the value of a communication flag as the input value.
+ * Flag memory area is treated as volatile.
+ * The flag must have been allocated with RTE_GPU_COMM_FLAG_CPU.
+ *
+ * @param devflag
+ * Pointer to the memory area of the devflag structure.
+ * @param val
+ * Value to set in the flag.
+ *
+ * @return
+ * 0 on success, -rte_errno otherwise:
+ * - EINVAL if invalid input params
+ */
+__rte_experimental
+int rte_gpu_comm_set_flag(struct rte_gpu_comm_flag *devflag,
+ uint32_t val);
+
+/**
+ * @warning
+ * @b EXPERIMENTAL: this API may change without prior notice.
+ *
+ * Get the value of the communication flag.
+ * Flag memory area is treated as volatile.
+ * The flag must have been allocated with RTE_GPU_COMM_FLAG_CPU.
+ *
+ * @param devflag
+ * Pointer to the memory area of the devflag structure.
+ * @param val
+ * Flag output value.
+ *
+ * @return
+ * 0 on success, -rte_errno otherwise:
+ * - EINVAL if invalid input params
+ */
+__rte_experimental
+int rte_gpu_comm_get_flag_value(struct rte_gpu_comm_flag *devflag,
+ uint32_t *val);
+
#ifdef __cplusplus
}
#endif
git.droids-corp.org / dpdk.git / blobdiff