path: root/lib/librte_eal/common/eal_private.h

/*-
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 *
 *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
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 *
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 *       notice, this list of conditions and the following disclaimer.
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 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#ifndef _EAL_PRIVATE_H_
#define _EAL_PRIVATE_H_

#include <stdbool.h>
#include <stdio.h>
#include <rte_pci.h>

/**
 * Initialize the memzone subsystem (private to eal).
 *
 * @return
 *   - 0 on success
 *   - Negative on error
 */
int rte_eal_memzone_init(void);

/**
 * Common log initialization function (private to eal).  Determines
 * where log data is written when no call to rte_openlog_stream is
 * in effect.
 *
 * @param default_log
 *   The default log stream to be used.
 * @return
 *   - 0 on success
 *   - Negative on error
 */
void eal_log_set_default(FILE *default_log);

/**
 * Fill configuration with number of physical and logical processors
 *
 * This function is private to EAL.
 *
 * Parse /proc/cpuinfo to get the number of physical and logical
 * processors on the machine.
 *
 * @return
 *   0 on success, negative on error
 */
int rte_eal_cpu_init(void);

/**
 * Map memory
 *
 * This function is private to EAL.
 *
 * Fill configuration structure with these infos, and return 0 on success.
 *
 * @return
 *   0 on success, negative on error
 */
int rte_eal_memory_init(void);

/**
 * Configure timers
 *
 * This function is private to EAL.
 *
 * Mmap memory areas used by HPET (high precision event timer) that will
 * provide our time reference, and configure the TSC frequency also for it
 * to be used as a reference.
 *
 * @return
 *   0 on success, negative on error
 */
int rte_eal_timer_init(void);

/**
 * Init the default log stream
 *
 * This function is private to EAL.
 *
 * @return
 *   0 on success, negative on error
 */
int rte_eal_log_init(const char *id, int facility);

struct rte_pci_driver;
struct rte_pci_device;

/**
 * Find the name of a PCI device.
 */
void pci_name_set(struct rte_pci_device *dev);

/**
 * Add a PCI device to the PCI Bus (append to PCI Device list). This function
 * also updates the bus references of the PCI Device (and the generic device
 * object embedded within.
 *
 * @param pci_dev
 *	PCI device to add
 * @return void
 */
void rte_pci_add_device(struct rte_pci_device *pci_dev);

/**
 * Insert a PCI device in the PCI Bus at a particular location in the device
 * list. It also updates the PCI Bus reference of the new devices to be
 * inserted.
 *
 * @param exist_pci_dev
 *	Existing PCI device in PCI Bus
 * @param new_pci_dev
 *	PCI device to be added before exist_pci_dev
 * @return void
 */
void rte_pci_insert_device(struct rte_pci_device *exist_pci_dev,
		struct rte_pci_device *new_pci_dev);

/**
 * Remove a PCI device from the PCI Bus. This sets to NULL the bus references
 * in the PCI device object as well as the generic device object.
 *
 * @param pci_device
 *	PCI device to be removed from PCI Bus
 * @return void
 */
void rte_pci_remove_device(struct rte_pci_device *pci_device);

/**
 * Update a pci device object by asking the kernel for the latest information.
 *
 * This function is private to EAL.
 *
 * @param addr
 *	The PCI Bus-Device-Function address to look for
 * @return
 *   - 0 on success.
 *   - negative on error.
 */
int pci_update_device(const struct rte_pci_addr *addr);

/**
 * Unbind kernel driver for this device
 *
 * This function is private to EAL.
 *
 * @return
 *   0 on success, negative on error
 */
int pci_unbind_kernel_driver(struct rte_pci_device *dev);

/**
 * Map the PCI resource of a PCI device in virtual memory
 *
 * This function is private to EAL.
 *
 * @return
 *   0 on success, negative on error
 */
int pci_uio_map_resource(struct rte_pci_device *dev);

/**
 * Unmap the PCI resource of a PCI device
 *
 * This function is private to EAL.
 */
void pci_uio_unmap_resource(struct rte_pci_device *dev);

/**
 * Allocate uio resource for PCI device
 *
 * This function is private to EAL.
 *
 * @param dev
 *   PCI device to allocate uio resource
 * @param uio_res
 *   Pointer to uio resource.
 *   If the function returns 0, the pointer will be filled.
 * @return
 *   0 on success, negative on error
 */
int pci_uio_alloc_resource(struct rte_pci_device *dev,
		struct mapped_pci_resource **uio_res);

/**
 * Free uio resource for PCI device
 *
 * This function is private to EAL.
 *
 * @param dev
 *   PCI device to free uio resource
 * @param uio_res
 *   Pointer to uio resource.
 */
void pci_uio_free_resource(struct rte_pci_device *dev,
		struct mapped_pci_resource *uio_res);

/**
 * Map device memory to uio resource
 *
 * This function is private to EAL.
 *
 * @param dev
 *   PCI device that has memory information.
 * @param res_idx
 *   Memory resource index of the PCI device.
 * @param uio_res
 *  uio resource that will keep mapping information.
 * @param map_idx
 *   Mapping information index of the uio resource.
 * @return
 *   0 on success, negative on error
 */
int pci_uio_map_resource_by_index(struct rte_pci_device *dev, int res_idx,
		struct mapped_pci_resource *uio_res, int map_idx);

/**
 * Init tail queues for non-EAL library structures. This is to allow
 * the rings, mempools, etc. lists to be shared among multiple processes
 *
 * This function is private to EAL
 *
 * @return
 *    0 on success, negative on error
 */
int rte_eal_tailqs_init(void);

/**
 * Init interrupt handling.
 *
 * This function is private to EAL.
 *
 * @return
 *  0 on success, negative on error
 */
int rte_eal_intr_init(void);

/**
 * Init alarm mechanism. This is to allow a callback be called after
 * specific time.
 *
 * This function is private to EAL.
 *
 * @return
 *  0 on success, negative on error
 */
int rte_eal_alarm_init(void);

/**
 * Function is to check if the kernel module(like, vfio, vfio_iommu_type1,
 * etc.) loaded.
 *
 * @param module_name
 *	The module's name which need to be checked
 *
 * @return
 *	-1 means some error happens(NULL pointer or open failure)
 *	0  means the module not loaded
 *	1  means the module loaded
 */
int rte_eal_check_module(const char *module_name);

/**
 * Get cpu core_id.
 *
 * This function is private to the EAL.
 */
unsigned eal_cpu_core_id(unsigned lcore_id);

/**
 * Check if cpu is present.
 *
 * This function is private to the EAL.
 */
int eal_cpu_detected(unsigned lcore_id);

/**
 * Set TSC frequency from precise value or estimation
 *
 * This function is private to the EAL.
 */
void set_tsc_freq(void);

/**
 * Get precise TSC frequency from system
 *
 * This function is private to the EAL.
 */
uint64_t get_tsc_freq(void);

/**
 * Prepare physical memory mapping
 * i.e. hugepages on Linux and
 *      contigmem on BSD.
 *
 * This function is private to the EAL.
 */
int rte_eal_hugepage_init(void);

/**
 * Creates memory mapping in secondary process
 * i.e. hugepages on Linux and
 *      contigmem on BSD.
 *
 * This function is private to the EAL.
 */
int rte_eal_hugepage_attach(void);

/**
 * Returns true if the system is able to obtain
 * physical addresses. Return false if using DMA
 * addresses through an IOMMU.
 *
 * Drivers based on uio will not load unless physical
 * addresses are obtainable. It is only possible to get
 * physical addresses when running as a privileged user.
 */
bool rte_eal_using_phys_addrs(void);

/**
 * Find a bus capable of identifying a device.
 *
 * @param str
 *   A device identifier (PCI address, virtual PMD name, ...).
 *
 * @return
 *   A valid bus handle if found.
 *   NULL if no bus is able to parse this device.
 */
struct rte_bus *rte_bus_find_by_device_name(const char *str);

#endif /* _EAL_PRIVATE_H_ */