diff options
Diffstat (limited to 'drivers/infiniband/hw/hns/hns_roce_pd.c')
| -rw-r--r-- | drivers/infiniband/hw/hns/hns_roce_pd.c | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/hns/hns_roce_pd.c b/drivers/infiniband/hw/hns/hns_roce_pd.c new file mode 100644 index 000000000..bd1fe89ca --- /dev/null +++ b/drivers/infiniband/hw/hns/hns_roce_pd.c @@ -0,0 +1,170 @@ +/* + * 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/pci.h> +#include "hns_roce_device.h" + +void hns_roce_init_pd_table(struct hns_roce_dev *hr_dev) +{ + struct hns_roce_ida *pd_ida = &hr_dev->pd_ida; + + ida_init(&pd_ida->ida); + pd_ida->max = hr_dev->caps.num_pds - 1; + pd_ida->min = hr_dev->caps.reserved_pds; +} + +int hns_roce_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata) +{ + struct ib_device *ib_dev = ibpd->device; + struct hns_roce_dev *hr_dev = to_hr_dev(ib_dev); + struct hns_roce_ida *pd_ida = &hr_dev->pd_ida; + struct hns_roce_pd *pd = to_hr_pd(ibpd); + int ret = 0; + int id; + + id = ida_alloc_range(&pd_ida->ida, pd_ida->min, pd_ida->max, + GFP_KERNEL); + if (id < 0) { + ibdev_err(ib_dev, "failed to alloc pd, id = %d.\n", id); + return -ENOMEM; + } + pd->pdn = (unsigned long)id; + + if (udata) { + struct hns_roce_ib_alloc_pd_resp resp = {.pdn = pd->pdn}; + + ret = ib_copy_to_udata(udata, &resp, + min(udata->outlen, sizeof(resp))); + if (ret) { + ida_free(&pd_ida->ida, id); + ibdev_err(ib_dev, "failed to copy to udata, ret = %d\n", ret); + } + } + + return ret; +} + +int hns_roce_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata) +{ + struct hns_roce_dev *hr_dev = to_hr_dev(pd->device); + + ida_free(&hr_dev->pd_ida.ida, (int)to_hr_pd(pd)->pdn); + + return 0; +} + +int hns_roce_uar_alloc(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar) +{ + struct hns_roce_ida *uar_ida = &hr_dev->uar_ida; + int id; + + /* Using bitmap to manager UAR index */ + id = ida_alloc_range(&uar_ida->ida, uar_ida->min, uar_ida->max, + GFP_KERNEL); + if (id < 0) { + ibdev_err(&hr_dev->ib_dev, "failed to alloc uar id(%d).\n", id); + return -ENOMEM; + } + uar->logic_idx = (unsigned long)id; + + 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; + + uar->pfn = ((pci_resource_start(hr_dev->pci_dev, 2)) >> PAGE_SHIFT); + if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_DIRECT_WQE) + hr_dev->dwqe_page = pci_resource_start(hr_dev->pci_dev, 4); + + return 0; +} + +void hns_roce_init_uar_table(struct hns_roce_dev *hr_dev) +{ + struct hns_roce_ida *uar_ida = &hr_dev->uar_ida; + + ida_init(&uar_ida->ida); + uar_ida->max = hr_dev->caps.num_uars - 1; + uar_ida->min = hr_dev->caps.reserved_uars; +} + +static int hns_roce_xrcd_alloc(struct hns_roce_dev *hr_dev, u32 *xrcdn) +{ + struct hns_roce_ida *xrcd_ida = &hr_dev->xrcd_ida; + int id; + + id = ida_alloc_range(&xrcd_ida->ida, xrcd_ida->min, xrcd_ida->max, + GFP_KERNEL); + if (id < 0) { + ibdev_err(&hr_dev->ib_dev, "failed to alloc xrcdn(%d).\n", id); + return -ENOMEM; + } + *xrcdn = (u32)id; + + return 0; +} + +void hns_roce_init_xrcd_table(struct hns_roce_dev *hr_dev) +{ + struct hns_roce_ida *xrcd_ida = &hr_dev->xrcd_ida; + + ida_init(&xrcd_ida->ida); + xrcd_ida->max = hr_dev->caps.num_xrcds - 1; + xrcd_ida->min = hr_dev->caps.reserved_xrcds; +} + +int hns_roce_alloc_xrcd(struct ib_xrcd *ib_xrcd, struct ib_udata *udata) +{ + struct hns_roce_dev *hr_dev = to_hr_dev(ib_xrcd->device); + struct hns_roce_xrcd *xrcd = to_hr_xrcd(ib_xrcd); + int ret; + + if (!(hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_XRC)) + return -EOPNOTSUPP; + + ret = hns_roce_xrcd_alloc(hr_dev, &xrcd->xrcdn); + if (ret) + return ret; + + return 0; +} + +int hns_roce_dealloc_xrcd(struct ib_xrcd *ib_xrcd, struct ib_udata *udata) +{ + struct hns_roce_dev *hr_dev = to_hr_dev(ib_xrcd->device); + u32 xrcdn = to_hr_xrcd(ib_xrcd)->xrcdn; + + ida_free(&hr_dev->xrcd_ida.ida, (int)xrcdn); + + return 0; +} |