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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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617cf24f9f
Here Clean up unnecessary initial value for some variable. Signed-off-by: Lang Cheng <chenglang@huawei.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
141 lines
4.1 KiB
C
141 lines
4.1 KiB
C
/*
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* Copyright (c) 2016 Hisilicon Limited.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/platform_device.h>
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#include <linux/pci.h>
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#include <uapi/rdma/hns-abi.h>
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#include "hns_roce_device.h"
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static int hns_roce_pd_alloc(struct hns_roce_dev *hr_dev, unsigned long *pdn)
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{
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return hns_roce_bitmap_alloc(&hr_dev->pd_bitmap, pdn) ? -ENOMEM : 0;
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}
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static void hns_roce_pd_free(struct hns_roce_dev *hr_dev, unsigned long pdn)
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{
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hns_roce_bitmap_free(&hr_dev->pd_bitmap, pdn, BITMAP_NO_RR);
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}
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int hns_roce_init_pd_table(struct hns_roce_dev *hr_dev)
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{
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return hns_roce_bitmap_init(&hr_dev->pd_bitmap, hr_dev->caps.num_pds,
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hr_dev->caps.num_pds - 1,
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hr_dev->caps.reserved_pds, 0);
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}
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void hns_roce_cleanup_pd_table(struct hns_roce_dev *hr_dev)
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{
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hns_roce_bitmap_cleanup(&hr_dev->pd_bitmap);
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}
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int hns_roce_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
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{
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struct ib_device *ib_dev = ibpd->device;
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struct hns_roce_dev *hr_dev = to_hr_dev(ib_dev);
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struct device *dev = hr_dev->dev;
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struct hns_roce_pd *pd = to_hr_pd(ibpd);
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int ret;
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ret = hns_roce_pd_alloc(to_hr_dev(ib_dev), &pd->pdn);
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if (ret) {
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dev_err(dev, "[alloc_pd]hns_roce_pd_alloc failed!\n");
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return ret;
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}
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if (udata) {
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struct hns_roce_ib_alloc_pd_resp uresp = {.pdn = pd->pdn};
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if (ib_copy_to_udata(udata, &uresp, sizeof(uresp))) {
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hns_roce_pd_free(to_hr_dev(ib_dev), pd->pdn);
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dev_err(dev, "[alloc_pd]ib_copy_to_udata failed!\n");
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return -EFAULT;
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}
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}
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return 0;
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}
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void hns_roce_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata)
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{
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hns_roce_pd_free(to_hr_dev(pd->device), to_hr_pd(pd)->pdn);
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}
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int hns_roce_uar_alloc(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
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{
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struct resource *res;
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int ret;
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/* Using bitmap to manager UAR index */
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ret = hns_roce_bitmap_alloc(&hr_dev->uar_table.bitmap, &uar->logic_idx);
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if (ret == -1)
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return -ENOMEM;
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if (uar->logic_idx > 0 && hr_dev->caps.phy_num_uars > 1)
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uar->index = (uar->logic_idx - 1) %
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(hr_dev->caps.phy_num_uars - 1) + 1;
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else
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uar->index = 0;
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if (!dev_is_pci(hr_dev->dev)) {
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res = platform_get_resource(hr_dev->pdev, IORESOURCE_MEM, 0);
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if (!res) {
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dev_err(&hr_dev->pdev->dev, "memory resource not found!\n");
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return -EINVAL;
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}
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uar->pfn = ((res->start) >> PAGE_SHIFT) + uar->index;
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} else {
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uar->pfn = ((pci_resource_start(hr_dev->pci_dev, 2))
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>> PAGE_SHIFT);
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}
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return 0;
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}
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void hns_roce_uar_free(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
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{
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hns_roce_bitmap_free(&hr_dev->uar_table.bitmap, uar->logic_idx,
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BITMAP_NO_RR);
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}
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int hns_roce_init_uar_table(struct hns_roce_dev *hr_dev)
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{
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return hns_roce_bitmap_init(&hr_dev->uar_table.bitmap,
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hr_dev->caps.num_uars,
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hr_dev->caps.num_uars - 1,
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hr_dev->caps.reserved_uars, 0);
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}
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void hns_roce_cleanup_uar_table(struct hns_roce_dev *hr_dev)
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{
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hns_roce_bitmap_cleanup(&hr_dev->uar_table.bitmap);
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}
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