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