diff options
Diffstat (limited to 'drivers/infiniband/hw/hns/hns_roce_pd.c')
-rw-r--r-- | drivers/infiniband/hw/hns/hns_roce_pd.c | 138 |
1 files changed, 138 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 000000000000..05db7d59812a --- /dev/null +++ b/drivers/infiniband/hw/hns/hns_roce_pd.c @@ -0,0 +1,138 @@ +/* + * 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 "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); +} + +static void hns_roce_pd_free(struct hns_roce_dev *hr_dev, unsigned long pdn) +{ + hns_roce_bitmap_free(&hr_dev->pd_bitmap, pdn); +} + +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->pdev->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) { + if (ib_copy_to_udata(udata, &pd->pdn, sizeof(u64))) { + 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; +} + +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; +} + +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->index); + if (ret == -1) + return -ENOMEM; + + if (uar->index > 0) + uar->index = (uar->index - 1) % + (hr_dev->caps.phy_num_uars - 1) + 1; + + 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; + + 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->index); +} + +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); +} |