1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
3 * Copyright (c) 2018 Hisilicon Limited.
6 #include <rdma/ib_umem.h>
7 #include <rdma/hns-abi.h>
8 #include "hns_roce_device.h"
9 #include "hns_roce_cmd.h"
10 #include "hns_roce_hem.h"
12 void hns_roce_srq_event(struct hns_roce_dev *hr_dev, u32 srqn, int event_type)
14 struct hns_roce_srq_table *srq_table = &hr_dev->srq_table;
15 struct hns_roce_srq *srq;
17 xa_lock(&srq_table->xa);
18 srq = xa_load(&srq_table->xa, srqn & (hr_dev->caps.num_srqs - 1));
20 atomic_inc(&srq->refcount);
21 xa_unlock(&srq_table->xa);
24 dev_warn(hr_dev->dev, "Async event for bogus SRQ %08x\n", srqn);
28 srq->event(srq, event_type);
30 if (atomic_dec_and_test(&srq->refcount))
34 static void hns_roce_ib_srq_event(struct hns_roce_srq *srq,
35 enum hns_roce_event event_type)
37 struct hns_roce_dev *hr_dev = to_hr_dev(srq->ibsrq.device);
38 struct ib_srq *ibsrq = &srq->ibsrq;
39 struct ib_event event;
41 if (ibsrq->event_handler) {
42 event.device = ibsrq->device;
43 event.element.srq = ibsrq;
45 case HNS_ROCE_EVENT_TYPE_SRQ_LIMIT_REACH:
46 event.event = IB_EVENT_SRQ_LIMIT_REACHED;
48 case HNS_ROCE_EVENT_TYPE_SRQ_CATAS_ERROR:
49 event.event = IB_EVENT_SRQ_ERR;
53 "hns_roce:Unexpected event type 0x%x on SRQ %06lx\n",
54 event_type, srq->srqn);
58 ibsrq->event_handler(&event, ibsrq->srq_context);
62 static int hns_roce_hw_create_srq(struct hns_roce_dev *dev,
63 struct hns_roce_cmd_mailbox *mailbox,
64 unsigned long srq_num)
66 return hns_roce_cmd_mbox(dev, mailbox->dma, 0, srq_num, 0,
67 HNS_ROCE_CMD_CREATE_SRQ,
68 HNS_ROCE_CMD_TIMEOUT_MSECS);
71 static int hns_roce_hw_destroy_srq(struct hns_roce_dev *dev,
72 struct hns_roce_cmd_mailbox *mailbox,
73 unsigned long srq_num)
75 return hns_roce_cmd_mbox(dev, 0, mailbox ? mailbox->dma : 0, srq_num,
76 mailbox ? 0 : 1, HNS_ROCE_CMD_DESTROY_SRQ,
77 HNS_ROCE_CMD_TIMEOUT_MSECS);
80 static int alloc_srqc(struct hns_roce_dev *hr_dev, struct hns_roce_srq *srq,
81 u32 pdn, u32 cqn, u16 xrcd, u64 db_rec_addr)
83 struct hns_roce_srq_table *srq_table = &hr_dev->srq_table;
84 struct ib_device *ibdev = &hr_dev->ib_dev;
85 struct hns_roce_cmd_mailbox *mailbox;
86 u64 mtts_wqe[MTT_MIN_COUNT] = { 0 };
87 u64 mtts_idx[MTT_MIN_COUNT] = { 0 };
88 dma_addr_t dma_handle_wqe = 0;
89 dma_addr_t dma_handle_idx = 0;
92 /* Get the physical address of srq buf */
93 ret = hns_roce_mtr_find(hr_dev, &srq->buf_mtr, 0, mtts_wqe,
94 ARRAY_SIZE(mtts_wqe), &dma_handle_wqe);
96 ibdev_err(ibdev, "Failed to find mtr for SRQ WQE\n");
100 /* Get physical address of idx que buf */
101 ret = hns_roce_mtr_find(hr_dev, &srq->idx_que.mtr, 0, mtts_idx,
102 ARRAY_SIZE(mtts_idx), &dma_handle_idx);
104 ibdev_err(ibdev, "Failed to find mtr for SRQ idx\n");
108 ret = hns_roce_bitmap_alloc(&srq_table->bitmap, &srq->srqn);
110 ibdev_err(ibdev, "Failed to alloc SRQ number, err %d\n", ret);
114 ret = hns_roce_table_get(hr_dev, &srq_table->table, srq->srqn);
116 ibdev_err(ibdev, "Failed to get SRQC table, err %d\n", ret);
120 ret = xa_err(xa_store(&srq_table->xa, srq->srqn, srq, GFP_KERNEL));
122 ibdev_err(ibdev, "Failed to store SRQC, err %d\n", ret);
126 mailbox = hns_roce_alloc_cmd_mailbox(hr_dev);
127 if (IS_ERR_OR_NULL(mailbox)) {
129 ibdev_err(ibdev, "Failed to alloc mailbox for SRQC\n");
133 hr_dev->hw->write_srqc(hr_dev, srq, pdn, xrcd, cqn, mailbox->buf,
134 mtts_wqe, mtts_idx, dma_handle_wqe,
137 ret = hns_roce_hw_create_srq(hr_dev, mailbox, srq->srqn);
138 hns_roce_free_cmd_mailbox(hr_dev, mailbox);
140 ibdev_err(ibdev, "Failed to config SRQC, err %d\n", ret);
144 atomic_set(&srq->refcount, 1);
145 init_completion(&srq->free);
149 xa_erase(&srq_table->xa, srq->srqn);
152 hns_roce_table_put(hr_dev, &srq_table->table, srq->srqn);
155 hns_roce_bitmap_free(&srq_table->bitmap, srq->srqn, BITMAP_NO_RR);
159 static void free_srqc(struct hns_roce_dev *hr_dev, struct hns_roce_srq *srq)
161 struct hns_roce_srq_table *srq_table = &hr_dev->srq_table;
164 ret = hns_roce_hw_destroy_srq(hr_dev, NULL, srq->srqn);
166 dev_err(hr_dev->dev, "DESTROY_SRQ failed (%d) for SRQN %06lx\n",
169 xa_erase(&srq_table->xa, srq->srqn);
171 if (atomic_dec_and_test(&srq->refcount))
172 complete(&srq->free);
173 wait_for_completion(&srq->free);
175 hns_roce_table_put(hr_dev, &srq_table->table, srq->srqn);
176 hns_roce_bitmap_free(&srq_table->bitmap, srq->srqn, BITMAP_NO_RR);
179 static int alloc_srq_buf(struct hns_roce_dev *hr_dev, struct hns_roce_srq *srq,
180 struct ib_udata *udata, unsigned long addr)
182 struct ib_device *ibdev = &hr_dev->ib_dev;
183 struct hns_roce_buf_attr buf_attr = {};
186 srq->wqe_shift = ilog2(roundup_pow_of_two(max(HNS_ROCE_SGE_SIZE,
190 buf_attr.page_shift = hr_dev->caps.srqwqe_buf_pg_sz + HNS_HW_PAGE_SHIFT;
191 buf_attr.region[0].size = to_hr_hem_entries_size(srq->wqe_cnt,
193 buf_attr.region[0].hopnum = hr_dev->caps.srqwqe_hop_num;
194 buf_attr.region_count = 1;
195 buf_attr.fixed_page = true;
197 err = hns_roce_mtr_create(hr_dev, &srq->buf_mtr, &buf_attr,
198 hr_dev->caps.srqwqe_ba_pg_sz +
199 HNS_HW_PAGE_SHIFT, udata, addr);
201 ibdev_err(ibdev, "Failed to alloc SRQ buf mtr, err %d\n", err);
206 static void free_srq_buf(struct hns_roce_dev *hr_dev, struct hns_roce_srq *srq)
208 hns_roce_mtr_destroy(hr_dev, &srq->buf_mtr);
211 static int alloc_srq_idx(struct hns_roce_dev *hr_dev, struct hns_roce_srq *srq,
212 struct ib_udata *udata, unsigned long addr)
214 struct hns_roce_idx_que *idx_que = &srq->idx_que;
215 struct ib_device *ibdev = &hr_dev->ib_dev;
216 struct hns_roce_buf_attr buf_attr = {};
219 srq->idx_que.entry_shift = ilog2(HNS_ROCE_IDX_QUE_ENTRY_SZ);
221 buf_attr.page_shift = hr_dev->caps.idx_buf_pg_sz + HNS_HW_PAGE_SHIFT;
222 buf_attr.region[0].size = to_hr_hem_entries_size(srq->wqe_cnt,
223 srq->idx_que.entry_shift);
224 buf_attr.region[0].hopnum = hr_dev->caps.idx_hop_num;
225 buf_attr.region_count = 1;
226 buf_attr.fixed_page = true;
228 err = hns_roce_mtr_create(hr_dev, &idx_que->mtr, &buf_attr,
229 hr_dev->caps.idx_ba_pg_sz + HNS_HW_PAGE_SHIFT,
232 ibdev_err(ibdev, "Failed to alloc SRQ idx mtr, err %d\n", err);
237 idx_que->bitmap = bitmap_zalloc(srq->wqe_cnt, GFP_KERNEL);
238 if (!idx_que->bitmap) {
239 ibdev_err(ibdev, "Failed to alloc SRQ idx bitmap\n");
248 hns_roce_mtr_destroy(hr_dev, &idx_que->mtr);
253 static void free_srq_idx(struct hns_roce_dev *hr_dev, struct hns_roce_srq *srq)
255 struct hns_roce_idx_que *idx_que = &srq->idx_que;
257 bitmap_free(idx_que->bitmap);
258 idx_que->bitmap = NULL;
259 hns_roce_mtr_destroy(hr_dev, &idx_que->mtr);
262 static int alloc_srq_wrid(struct hns_roce_dev *hr_dev, struct hns_roce_srq *srq)
265 srq->tail = srq->wqe_cnt - 1;
266 srq->wrid = kvmalloc_array(srq->wqe_cnt, sizeof(u64), GFP_KERNEL);
273 static void free_srq_wrid(struct hns_roce_srq *srq)
279 int hns_roce_create_srq(struct ib_srq *ib_srq,
280 struct ib_srq_init_attr *init_attr,
281 struct ib_udata *udata)
283 struct hns_roce_dev *hr_dev = to_hr_dev(ib_srq->device);
284 struct hns_roce_ib_create_srq_resp resp = {};
285 struct hns_roce_srq *srq = to_hr_srq(ib_srq);
286 struct ib_device *ibdev = &hr_dev->ib_dev;
287 struct hns_roce_ib_create_srq ucmd = {};
291 /* Check the actual SRQ wqe and SRQ sge num */
292 if (init_attr->attr.max_wr >= hr_dev->caps.max_srq_wrs ||
293 init_attr->attr.max_sge > hr_dev->caps.max_srq_sges)
296 mutex_init(&srq->mutex);
297 spin_lock_init(&srq->lock);
299 srq->wqe_cnt = roundup_pow_of_two(init_attr->attr.max_wr + 1);
300 srq->max_gs = init_attr->attr.max_sge + HNS_ROCE_RESERVED_SGE;
303 ret = ib_copy_from_udata(&ucmd, udata, sizeof(ucmd));
305 ibdev_err(ibdev, "Failed to copy SRQ udata, err %d\n",
311 ret = alloc_srq_buf(hr_dev, srq, udata, ucmd.buf_addr);
313 ibdev_err(ibdev, "Failed to alloc SRQ buffer, err %d\n", ret);
317 ret = alloc_srq_idx(hr_dev, srq, udata, ucmd.que_addr);
319 ibdev_err(ibdev, "Failed to alloc SRQ idx, err %d\n", ret);
324 ret = alloc_srq_wrid(hr_dev, srq);
326 ibdev_err(ibdev, "Failed to alloc SRQ wrid, err %d\n",
332 cqn = ib_srq_has_cq(init_attr->srq_type) ?
333 to_hr_cq(init_attr->ext.cq)->cqn : 0;
334 srq->db_reg_l = hr_dev->reg_base + SRQ_DB_REG;
336 ret = alloc_srqc(hr_dev, srq, to_hr_pd(ib_srq->pd)->pdn, cqn, 0, 0);
338 ibdev_err(ibdev, "Failed to alloc SRQ context, err %d\n", ret);
342 srq->event = hns_roce_ib_srq_event;
343 resp.srqn = srq->srqn;
346 if (ib_copy_to_udata(udata, &resp,
347 min(udata->outlen, sizeof(resp)))) {
356 free_srqc(hr_dev, srq);
360 free_srq_idx(hr_dev, srq);
362 free_srq_buf(hr_dev, srq);
366 void hns_roce_destroy_srq(struct ib_srq *ibsrq, struct ib_udata *udata)
368 struct hns_roce_dev *hr_dev = to_hr_dev(ibsrq->device);
369 struct hns_roce_srq *srq = to_hr_srq(ibsrq);
371 free_srqc(hr_dev, srq);
372 free_srq_idx(hr_dev, srq);
374 free_srq_buf(hr_dev, srq);
377 int hns_roce_init_srq_table(struct hns_roce_dev *hr_dev)
379 struct hns_roce_srq_table *srq_table = &hr_dev->srq_table;
381 xa_init(&srq_table->xa);
383 return hns_roce_bitmap_init(&srq_table->bitmap, hr_dev->caps.num_srqs,
384 hr_dev->caps.num_srqs - 1,
385 hr_dev->caps.reserved_srqs, 0);
388 void hns_roce_cleanup_srq_table(struct hns_roce_dev *hr_dev)
390 hns_roce_bitmap_cleanup(&hr_dev->srq_table.bitmap);