hns_roce_pd.c

  1/*
  2 * Copyright (c) 2016 Hisilicon Limited.
  3 *
  4 * This software is available to you under a choice of one of two
  5 * licenses.  You may choose to be licensed under the terms of the GNU
  6 * General Public License (GPL) Version 2, available from the file
  7 * COPYING in the main directory of this source tree, or the
  8 * OpenIB.org BSD license below:
  9 *
 10 *     Redistribution and use in source and binary forms, with or
 11 *     without modification, are permitted provided that the following
 12 *     conditions are met:
 13 *
 14 *      - Redistributions of source code must retain the above
 15 *        copyright notice, this list of conditions and the following
 16 *        disclaimer.
 17 *
 18 *      - Redistributions in binary form must reproduce the above
 19 *        copyright notice, this list of conditions and the following
 20 *        disclaimer in the documentation and/or other materials
 21 *        provided with the distribution.
 22 *
 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 30 * SOFTWARE.
 31 */
 32
 33#include "hns_roce_device.h"
 34
 35void hns_roce_init_pd_table(struct hns_roce_dev *hr_dev)
 36{
 37	struct hns_roce_ida *pd_ida = &hr_dev->pd_ida;
 38
 39	ida_init(&pd_ida->ida);
 40	pd_ida->max = hr_dev->caps.num_pds - 1;
 41	pd_ida->min = hr_dev->caps.reserved_pds;
 42}
 43
 44int hns_roce_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
 45{
 46	struct ib_device *ib_dev = ibpd->device;
 47	struct hns_roce_dev *hr_dev = to_hr_dev(ib_dev);
 48	struct hns_roce_ida *pd_ida = &hr_dev->pd_ida;
 49	struct hns_roce_pd *pd = to_hr_pd(ibpd);
 50	int ret = 0;
 51	int id;
 52
 53	id = ida_alloc_range(&pd_ida->ida, pd_ida->min, pd_ida->max,
 54			     GFP_KERNEL);
 55	if (id < 0) {
 56		ibdev_err(ib_dev, "failed to alloc pd, id = %d.\n", id);
 57		return -ENOMEM;
 58	}
 59	pd->pdn = (unsigned long)id;
 60
 61	if (udata) {
 62		struct hns_roce_ib_alloc_pd_resp resp = {.pdn = pd->pdn};
 63
 64		ret = ib_copy_to_udata(udata, &resp,
 65				       min(udata->outlen, sizeof(resp)));
 66		if (ret) {
 67			ida_free(&pd_ida->ida, id);
 68			ibdev_err(ib_dev, "failed to copy to udata, ret = %d\n", ret);
 69		}
 70	}
 71
 72	return ret;
 73}
 74
 75int hns_roce_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata)
 76{
 77	struct hns_roce_dev *hr_dev = to_hr_dev(pd->device);
 78
 79	ida_free(&hr_dev->pd_ida.ida, (int)to_hr_pd(pd)->pdn);
 80
 81	return 0;
 82}
 83
 84int hns_roce_uar_alloc(struct hns_roce_dev *hr_dev, struct hns_roce_uar *uar)
 85{
 86	struct hns_roce_ida *uar_ida = &hr_dev->uar_ida;
 87	int id;
 88
 89	/* Using bitmap to manager UAR index */
 90	id = ida_alloc_range(&uar_ida->ida, uar_ida->min, uar_ida->max,
 91			     GFP_KERNEL);
 92	if (id < 0) {
 93		ibdev_err(&hr_dev->ib_dev, "failed to alloc uar id(%d).\n", id);
 94		return -ENOMEM;
 95	}
 96	uar->logic_idx = (unsigned long)id;
 97
 98	if (uar->logic_idx > 0 && hr_dev->caps.phy_num_uars > 1)
 99		uar->index = (uar->logic_idx - 1) %
100			     (hr_dev->caps.phy_num_uars - 1) + 1;
101	else
102		uar->index = 0;
103
104	uar->pfn = ((pci_resource_start(hr_dev->pci_dev, 2)) >> PAGE_SHIFT);
105	if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_DIRECT_WQE)
106		hr_dev->dwqe_page = pci_resource_start(hr_dev->pci_dev, 4);
107
108	return 0;
109}
110
111void hns_roce_init_uar_table(struct hns_roce_dev *hr_dev)
112{
113	struct hns_roce_ida *uar_ida = &hr_dev->uar_ida;
114
115	ida_init(&uar_ida->ida);
116	uar_ida->max = hr_dev->caps.num_uars - 1;
117	uar_ida->min = hr_dev->caps.reserved_uars;
118}
119
120static int hns_roce_xrcd_alloc(struct hns_roce_dev *hr_dev, u32 *xrcdn)
121{
122	struct hns_roce_ida *xrcd_ida = &hr_dev->xrcd_ida;
123	int id;
124
125	id = ida_alloc_range(&xrcd_ida->ida, xrcd_ida->min, xrcd_ida->max,
126			     GFP_KERNEL);
127	if (id < 0) {
128		ibdev_err(&hr_dev->ib_dev, "failed to alloc xrcdn(%d).\n", id);
129		return -ENOMEM;
130	}
131	*xrcdn = (u32)id;
132
133	return 0;
134}
135
136void hns_roce_init_xrcd_table(struct hns_roce_dev *hr_dev)
137{
138	struct hns_roce_ida *xrcd_ida = &hr_dev->xrcd_ida;
139
140	ida_init(&xrcd_ida->ida);
141	xrcd_ida->max = hr_dev->caps.num_xrcds - 1;
142	xrcd_ida->min = hr_dev->caps.reserved_xrcds;
143}
144
145int hns_roce_alloc_xrcd(struct ib_xrcd *ib_xrcd, struct ib_udata *udata)
146{
147	struct hns_roce_dev *hr_dev = to_hr_dev(ib_xrcd->device);
148	struct hns_roce_xrcd *xrcd = to_hr_xrcd(ib_xrcd);
149	int ret;
150
151	if (!(hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_XRC)) {
152		ret = -EOPNOTSUPP;
153		goto err_out;
154	}
155
156	ret = hns_roce_xrcd_alloc(hr_dev, &xrcd->xrcdn);
157
158err_out:
159	if (ret)
160		atomic64_inc(&hr_dev->dfx_cnt[HNS_ROCE_DFX_XRCD_ALLOC_ERR_CNT]);
161
162	return ret;
163}
164
165int hns_roce_dealloc_xrcd(struct ib_xrcd *ib_xrcd, struct ib_udata *udata)
166{
167	struct hns_roce_dev *hr_dev = to_hr_dev(ib_xrcd->device);
168	u32 xrcdn = to_hr_xrcd(ib_xrcd)->xrcdn;
169
170	ida_free(&hr_dev->xrcd_ida.ida, (int)xrcdn);
171
172	return 0;
173}