linux/drivers/crypto/intel/qat/qat_common/adf_dev_mgr.c

// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
/* Copyright(c) 2014 - 2020 Intel Corporation */
#include <linux/mutex.h>
#include <linux/list.h>
#include "adf_cfg.h"
#include "adf_common_drv.h"

static LIST_HEAD(accel_table);
static LIST_HEAD(vfs_table);
static DEFINE_MUTEX(table_lock);
static u32 num_devices;
static u8 id_map[ADF_MAX_DEVICES];

struct vf_id_map { … };

static int adf_get_vf_id(struct adf_accel_dev *vf)
{ … }

static int adf_get_vf_num(struct adf_accel_dev *vf)
{ … }

static struct vf_id_map *adf_find_vf(u32 bdf)
{ … }

static int adf_get_vf_real_id(u32 fake)
{ … }

/**
 * adf_clean_vf_map() - Cleans VF id mappings
 * @vf: flag indicating whether mappings is cleaned
 *	for vfs only or for vfs and pfs
 *
 * Function cleans internal ids for virtual functions.
 */
void adf_clean_vf_map(bool vf)
{ … }
EXPORT_SYMBOL_GPL(…);

/**
 * adf_devmgr_update_class_index() - Update internal index
 * @hw_data:  Pointer to internal device data.
 *
 * Function updates internal dev index for VFs
 */
void adf_devmgr_update_class_index(struct adf_hw_device_data *hw_data)
{ … }
EXPORT_SYMBOL_GPL(…);

static unsigned int adf_find_free_id(void)
{ … }

/**
 * adf_devmgr_add_dev() - Add accel_dev to the acceleration framework
 * @accel_dev:  Pointer to acceleration device.
 * @pf:		Corresponding PF if the accel_dev is a VF
 *
 * Function adds acceleration device to the acceleration framework.
 * To be used by QAT device specific drivers.
 *
 * Return: 0 on success, error code otherwise.
 */
int adf_devmgr_add_dev(struct adf_accel_dev *accel_dev,
		       struct adf_accel_dev *pf)
{ … }
EXPORT_SYMBOL_GPL(…);

struct list_head *adf_devmgr_get_head(void)
{ … }

/**
 * adf_devmgr_rm_dev() - Remove accel_dev from the acceleration framework.
 * @accel_dev:  Pointer to acceleration device.
 * @pf:		Corresponding PF if the accel_dev is a VF
 *
 * Function removes acceleration device from the acceleration framework.
 * To be used by QAT device specific drivers.
 *
 * Return: void
 */
void adf_devmgr_rm_dev(struct adf_accel_dev *accel_dev,
		       struct adf_accel_dev *pf)
{ … }
EXPORT_SYMBOL_GPL(…);

struct adf_accel_dev *adf_devmgr_get_first(void)
{ … }

/**
 * adf_devmgr_pci_to_accel_dev() - Get accel_dev associated with the pci_dev.
 * @pci_dev:  Pointer to PCI device.
 *
 * Function returns acceleration device associated with the given PCI device.
 * To be used by QAT device specific drivers.
 *
 * Return: pointer to accel_dev or NULL if not found.
 */
struct adf_accel_dev *adf_devmgr_pci_to_accel_dev(struct pci_dev *pci_dev)
{ … }
EXPORT_SYMBOL_GPL(…);

struct adf_accel_dev *adf_devmgr_get_dev_by_id(u32 id)
{ … }

int adf_devmgr_verify_id(u32 id)
{ … }

static int adf_get_num_dettached_vfs(void)
{ … }

void adf_devmgr_get_num_dev(u32 *num)
{ … }

/**
 * adf_dev_in_use() - Check whether accel_dev is currently in use
 * @accel_dev: Pointer to acceleration device.
 *
 * To be used by QAT device specific drivers.
 *
 * Return: 1 when device is in use, 0 otherwise.
 */
int adf_dev_in_use(struct adf_accel_dev *accel_dev)
{ … }
EXPORT_SYMBOL_GPL(…);

/**
 * adf_dev_get() - Increment accel_dev reference count
 * @accel_dev: Pointer to acceleration device.
 *
 * Increment the accel_dev refcount and if this is the first time
 * incrementing it during this period the accel_dev is in use,
 * increment the module refcount too.
 * To be used by QAT device specific drivers.
 *
 * Return: 0 when successful, EFAULT when fail to bump module refcount
 */
int adf_dev_get(struct adf_accel_dev *accel_dev)
{ … }
EXPORT_SYMBOL_GPL(…);

/**
 * adf_dev_put() - Decrement accel_dev reference count
 * @accel_dev: Pointer to acceleration device.
 *
 * Decrement the accel_dev refcount and if this is the last time
 * decrementing it during this period the accel_dev is in use,
 * decrement the module refcount too.
 * To be used by QAT device specific drivers.
 *
 * Return: void
 */
void adf_dev_put(struct adf_accel_dev *accel_dev)
{ … }
EXPORT_SYMBOL_GPL(…);

/**
 * adf_devmgr_in_reset() - Check whether device is in reset
 * @accel_dev: Pointer to acceleration device.
 *
 * To be used by QAT device specific drivers.
 *
 * Return: 1 when the device is being reset, 0 otherwise.
 */
int adf_devmgr_in_reset(struct adf_accel_dev *accel_dev)
{ … }
EXPORT_SYMBOL_GPL(…);

/**
 * adf_dev_started() - Check whether device has started
 * @accel_dev: Pointer to acceleration device.
 *
 * To be used by QAT device specific drivers.
 *
 * Return: 1 when the device has started, 0 otherwise
 */
int adf_dev_started(struct adf_accel_dev *accel_dev)
{ … }
EXPORT_SYMBOL_GPL(…);