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/*
* Huawei HiNIC PCI Express Linux driver
* Copyright(c) 2017 Huawei Technologies Co., Ltd
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
*/
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/pci.h>
#include <linux/device.h>
#include <linux/workqueue.h>
#include "hinic_hw_if.h"
#include "hinic_hw_eqs.h"
#define HINIC_EQS_WQ_NAME "hinic_eqs"
/**
* hinic_aeq_register_hw_cb - register AEQ callback for specific event
* @aeqs: pointer to Async eqs of the chip
* @event: aeq event to register callback for it
* @handle: private data will be used by the callback
* @hw_handler: callback function
**/
void hinic_aeq_register_hw_cb(struct hinic_aeqs *aeqs,
enum hinic_aeq_type event, void *handle,
void (*hwe_handler)(void *handle, void *data,
u8 size))
{
struct hinic_hw_event_cb *hwe_cb = &aeqs->hwe_cb[event];
hwe_cb->hwe_handler = hwe_handler;
hwe_cb->handle = handle;
hwe_cb->hwe_state = HINIC_EQE_ENABLED;
}
/**
* hinic_aeq_unregister_hw_cb - unregister the AEQ callback for specific event
* @aeqs: pointer to Async eqs of the chip
* @event: aeq event to unregister callback for it
**/
void hinic_aeq_unregister_hw_cb(struct hinic_aeqs *aeqs,
enum hinic_aeq_type event)
{
struct hinic_hw_event_cb *hwe_cb = &aeqs->hwe_cb[event];
hwe_cb->hwe_state &= ~HINIC_EQE_ENABLED;
while (hwe_cb->hwe_state & HINIC_EQE_RUNNING)
schedule();
hwe_cb->hwe_handler = NULL;
}
/**
* init_eq - initialize Event Queue
* @eq: the event queue
* @hwif: the HW interface of a PCI function device
* @type: the type of the event queue, aeq or ceq
* @q_id: Queue id number
* @q_len: the number of EQ elements
* @page_size: the page size of the pages in the event queue
* @entry: msix entry associated with the event queue
*
* Return 0 - Success, Negative - Failure
**/
static int init_eq(struct hinic_eq *eq, struct hinic_hwif *hwif,
enum hinic_eq_type type, int q_id, u32 q_len, u32 page_size,
struct msix_entry entry)
{
/* should be implemented */
return 0;
}
/**
* remove_eq - remove Event Queue
* @eq: the event queue
**/
static void remove_eq(struct hinic_eq *eq)
{
/* should be implemented */
}
/**
* hinic_aeqs_init - initialize all the aeqs
* @aeqs: pointer to Async eqs of the chip
* @hwif: the HW interface of a PCI function device
* @num_aeqs: number of AEQs
* @q_len: number of EQ elements
* @page_size: the page size of the pages in the event queue
* @msix_entries: msix entries associated with the event queues
*
* Return 0 - Success, negative - Failure
**/
int hinic_aeqs_init(struct hinic_aeqs *aeqs, struct hinic_hwif *hwif,
int num_aeqs, u32 q_len, u32 page_size,
struct msix_entry *msix_entries)
{
struct pci_dev *pdev = hwif->pdev;
int err, i, q_id;
aeqs->workq = create_singlethread_workqueue(HINIC_EQS_WQ_NAME);
if (!aeqs->workq)
return -ENOMEM;
aeqs->hwif = hwif;
aeqs->num_aeqs = num_aeqs;
for (q_id = 0; q_id < num_aeqs; q_id++) {
err = init_eq(&aeqs->aeq[q_id], hwif, HINIC_AEQ, q_id, q_len,
page_size, msix_entries[q_id]);
if (err) {
dev_err(&pdev->dev, "Failed to init aeq %d\n", q_id);
goto err_init_aeq;
}
}
return 0;
err_init_aeq:
for (i = 0; i < q_id; i++)
remove_eq(&aeqs->aeq[i]);
destroy_workqueue(aeqs->workq);
return err;
}
/**
* hinic_aeqs_free - free all the aeqs
* @aeqs: pointer to Async eqs of the chip
**/
void hinic_aeqs_free(struct hinic_aeqs *aeqs)
{
int q_id;
for (q_id = 0; q_id < aeqs->num_aeqs ; q_id++)
remove_eq(&aeqs->aeq[q_id]);
destroy_workqueue(aeqs->workq);
}
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