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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/pci.h>
#include <linux/device.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include "hinic_hw_if.h"
#include "hinic_hw_wqe.h"
#include "hinic_hw_wq.h"
#include "hinic_hw_qp.h"
#include "hinic_hw_io.h"
/**
* init_qp - Initialize a Queue Pair
* @func_to_io: func to io channel that holds the IO components
* @qp: pointer to the qp to initialize
* @q_id: the id of the qp
* @sq_msix_entry: msix entry for sq
* @rq_msix_entry: msix entry for rq
*
* Return 0 - Success, negative - Failure
**/
static int init_qp(struct hinic_func_to_io *func_to_io,
struct hinic_qp *qp, int q_id,
struct msix_entry *sq_msix_entry,
struct msix_entry *rq_msix_entry)
{
struct hinic_hwif *hwif = func_to_io->hwif;
struct pci_dev *pdev = hwif->pdev;
int err;
qp->q_id = q_id;
err = hinic_wq_allocate(&func_to_io->wqs, &func_to_io->sq_wq[q_id],
HINIC_SQ_WQEBB_SIZE, HINIC_SQ_PAGE_SIZE,
HINIC_SQ_DEPTH, HINIC_SQ_WQE_MAX_SIZE);
if (err) {
dev_err(&pdev->dev, "Failed to allocate WQ for SQ\n");
return err;
}
err = hinic_wq_allocate(&func_to_io->wqs, &func_to_io->rq_wq[q_id],
HINIC_RQ_WQEBB_SIZE, HINIC_RQ_PAGE_SIZE,
HINIC_RQ_DEPTH, HINIC_RQ_WQE_SIZE);
if (err) {
dev_err(&pdev->dev, "Failed to allocate WQ for RQ\n");
goto err_rq_alloc;
}
return 0;
err_rq_alloc:
hinic_wq_free(&func_to_io->wqs, &func_to_io->sq_wq[q_id]);
return err;
}
/**
* destroy_qp - Clean the resources of a Queue Pair
* @func_to_io: func to io channel that holds the IO components
* @qp: pointer to the qp to clean
**/
static void destroy_qp(struct hinic_func_to_io *func_to_io,
struct hinic_qp *qp)
{
int q_id = qp->q_id;
hinic_wq_free(&func_to_io->wqs, &func_to_io->rq_wq[q_id]);
hinic_wq_free(&func_to_io->wqs, &func_to_io->sq_wq[q_id]);
}
/**
* hinic_io_create_qps - Create Queue Pairs
* @func_to_io: func to io channel that holds the IO components
* @base_qpn: base qp number
* @num_qps: number queue pairs to create
* @sq_msix_entry: msix entries for sq
* @rq_msix_entry: msix entries for rq
*
* Return 0 - Success, negative - Failure
**/
int hinic_io_create_qps(struct hinic_func_to_io *func_to_io,
u16 base_qpn, int num_qps,
struct msix_entry *sq_msix_entries,
struct msix_entry *rq_msix_entries)
{
struct hinic_hwif *hwif = func_to_io->hwif;
struct pci_dev *pdev = hwif->pdev;
size_t qps_size, wq_size;
int i, j, err;
qps_size = num_qps * sizeof(*func_to_io->qps);
func_to_io->qps = devm_kzalloc(&pdev->dev, qps_size, GFP_KERNEL);
if (!func_to_io->qps)
return -ENOMEM;
wq_size = num_qps * sizeof(*func_to_io->sq_wq);
func_to_io->sq_wq = devm_kzalloc(&pdev->dev, wq_size, GFP_KERNEL);
if (!func_to_io->sq_wq) {
err = -ENOMEM;
goto err_sq_wq;
}
wq_size = num_qps * sizeof(*func_to_io->rq_wq);
func_to_io->rq_wq = devm_kzalloc(&pdev->dev, wq_size, GFP_KERNEL);
if (!func_to_io->rq_wq) {
err = -ENOMEM;
goto err_rq_wq;
}
for (i = 0; i < num_qps; i++) {
err = init_qp(func_to_io, &func_to_io->qps[i], i,
&sq_msix_entries[i], &rq_msix_entries[i]);
if (err) {
dev_err(&pdev->dev, "Failed to create QP %d\n", i);
goto err_init_qp;
}
}
return 0;
err_init_qp:
for (j = 0; j < i; j++)
destroy_qp(func_to_io, &func_to_io->qps[j]);
devm_kfree(&pdev->dev, func_to_io->rq_wq);
err_rq_wq:
devm_kfree(&pdev->dev, func_to_io->sq_wq);
err_sq_wq:
devm_kfree(&pdev->dev, func_to_io->qps);
return err;
}
/**
* hinic_io_destroy_qps - Destroy the IO Queue Pairs
* @func_to_io: func to io channel that holds the IO components
* @num_qps: number queue pairs to destroy
**/
void hinic_io_destroy_qps(struct hinic_func_to_io *func_to_io, int num_qps)
{
struct hinic_hwif *hwif = func_to_io->hwif;
struct pci_dev *pdev = hwif->pdev;
int i;
for (i = 0; i < num_qps; i++)
destroy_qp(func_to_io, &func_to_io->qps[i]);
devm_kfree(&pdev->dev, func_to_io->rq_wq);
devm_kfree(&pdev->dev, func_to_io->sq_wq);
devm_kfree(&pdev->dev, func_to_io->qps);
}
/**
* hinic_io_init - Initialize the IO components
* @func_to_io: func to io channel that holds the IO components
* @hwif: HW interface for accessing IO
* @max_qps: maximum QPs in HW
* @num_ceqs: number completion event queues
* @ceq_msix_entries: msix entries for ceqs
*
* Return 0 - Success, negative - Failure
**/
int hinic_io_init(struct hinic_func_to_io *func_to_io,
struct hinic_hwif *hwif, u16 max_qps, int num_ceqs,
struct msix_entry *ceq_msix_entries)
{
struct pci_dev *pdev = hwif->pdev;
int err;
func_to_io->hwif = hwif;
func_to_io->qps = NULL;
func_to_io->max_qps = max_qps;
err = hinic_wqs_alloc(&func_to_io->wqs, 2 * max_qps, hwif);
if (err) {
dev_err(&pdev->dev, "Failed to allocate WQS for IO\n");
return err;
}
return 0;
}
/**
* hinic_io_free - Free the IO components
* @func_to_io: func to io channel that holds the IO components
**/
void hinic_io_free(struct hinic_func_to_io *func_to_io)
{
hinic_wqs_free(&func_to_io->wqs);
}
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