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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2022, Microsoft Corporation. All rights reserved.
4 */
5
6#include "mana_ib.h"
7
8void mana_ib_uncfg_vport(struct mana_ib_dev *dev, struct mana_ib_pd *pd,
9 u32 port)
10{
11 struct gdma_dev *gd = dev->gdma_dev;
12 struct mana_port_context *mpc;
13 struct net_device *ndev;
14 struct mana_context *mc;
15
16 mc = gd->driver_data;
17 ndev = mc->ports[port];
18 mpc = netdev_priv(ndev);
19
20 mutex_lock(&pd->vport_mutex);
21
22 pd->vport_use_count--;
23 WARN_ON(pd->vport_use_count < 0);
24
25 if (!pd->vport_use_count)
26 mana_uncfg_vport(mpc);
27
28 mutex_unlock(&pd->vport_mutex);
29}
30
31int mana_ib_cfg_vport(struct mana_ib_dev *dev, u32 port, struct mana_ib_pd *pd,
32 u32 doorbell_id)
33{
34 struct gdma_dev *mdev = dev->gdma_dev;
35 struct mana_port_context *mpc;
36 struct mana_context *mc;
37 struct net_device *ndev;
38 int err;
39
40 mc = mdev->driver_data;
41 ndev = mc->ports[port];
42 mpc = netdev_priv(ndev);
43
44 mutex_lock(&pd->vport_mutex);
45
46 pd->vport_use_count++;
47 if (pd->vport_use_count > 1) {
48 ibdev_dbg(&dev->ib_dev,
49 "Skip as this PD is already configured vport\n");
50 mutex_unlock(&pd->vport_mutex);
51 return 0;
52 }
53
54 err = mana_cfg_vport(mpc, pd->pdn, doorbell_id);
55 if (err) {
56 pd->vport_use_count--;
57 mutex_unlock(&pd->vport_mutex);
58
59 ibdev_dbg(&dev->ib_dev, "Failed to configure vPort %d\n", err);
60 return err;
61 }
62
63 mutex_unlock(&pd->vport_mutex);
64
65 pd->tx_shortform_allowed = mpc->tx_shortform_allowed;
66 pd->tx_vp_offset = mpc->tx_vp_offset;
67
68 ibdev_dbg(&dev->ib_dev, "vport handle %llx pdid %x doorbell_id %x\n",
69 mpc->port_handle, pd->pdn, doorbell_id);
70
71 return 0;
72}
73
74int mana_ib_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
75{
76 struct mana_ib_pd *pd = container_of(ibpd, struct mana_ib_pd, ibpd);
77 struct ib_device *ibdev = ibpd->device;
78 struct gdma_create_pd_resp resp = {};
79 struct gdma_create_pd_req req = {};
80 enum gdma_pd_flags flags = 0;
81 struct mana_ib_dev *dev;
82 struct gdma_dev *mdev;
83 int err;
84
85 dev = container_of(ibdev, struct mana_ib_dev, ib_dev);
86 mdev = dev->gdma_dev;
87
88 mana_gd_init_req_hdr(&req.hdr, GDMA_CREATE_PD, sizeof(req),
89 sizeof(resp));
90
91 req.flags = flags;
92 err = mana_gd_send_request(mdev->gdma_context, sizeof(req), &req,
93 sizeof(resp), &resp);
94
95 if (err || resp.hdr.status) {
96 ibdev_dbg(&dev->ib_dev,
97 "Failed to get pd_id err %d status %u\n", err,
98 resp.hdr.status);
99 if (!err)
100 err = -EPROTO;
101
102 return err;
103 }
104
105 pd->pd_handle = resp.pd_handle;
106 pd->pdn = resp.pd_id;
107 ibdev_dbg(&dev->ib_dev, "pd_handle 0x%llx pd_id %d\n",
108 pd->pd_handle, pd->pdn);
109
110 mutex_init(&pd->vport_mutex);
111 pd->vport_use_count = 0;
112 return 0;
113}
114
115int mana_ib_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
116{
117 struct mana_ib_pd *pd = container_of(ibpd, struct mana_ib_pd, ibpd);
118 struct ib_device *ibdev = ibpd->device;
119 struct gdma_destory_pd_resp resp = {};
120 struct gdma_destroy_pd_req req = {};
121 struct mana_ib_dev *dev;
122 struct gdma_dev *mdev;
123 int err;
124
125 dev = container_of(ibdev, struct mana_ib_dev, ib_dev);
126 mdev = dev->gdma_dev;
127
128 mana_gd_init_req_hdr(&req.hdr, GDMA_DESTROY_PD, sizeof(req),
129 sizeof(resp));
130
131 req.pd_handle = pd->pd_handle;
132 err = mana_gd_send_request(mdev->gdma_context, sizeof(req), &req,
133 sizeof(resp), &resp);
134
135 if (err || resp.hdr.status) {
136 ibdev_dbg(&dev->ib_dev,
137 "Failed to destroy pd_handle 0x%llx err %d status %u",
138 pd->pd_handle, err, resp.hdr.status);
139 if (!err)
140 err = -EPROTO;
141 }
142
143 return err;
144}
145
146static int mana_gd_destroy_doorbell_page(struct gdma_context *gc,
147 int doorbell_page)
148{
149 struct gdma_destroy_resource_range_req req = {};
150 struct gdma_resp_hdr resp = {};
151 int err;
152
153 mana_gd_init_req_hdr(&req.hdr, GDMA_DESTROY_RESOURCE_RANGE,
154 sizeof(req), sizeof(resp));
155
156 req.resource_type = GDMA_RESOURCE_DOORBELL_PAGE;
157 req.num_resources = 1;
158 req.allocated_resources = doorbell_page;
159
160 err = mana_gd_send_request(gc, sizeof(req), &req, sizeof(resp), &resp);
161 if (err || resp.status) {
162 dev_err(gc->dev,
163 "Failed to destroy doorbell page: ret %d, 0x%x\n",
164 err, resp.status);
165 return err ?: -EPROTO;
166 }
167
168 return 0;
169}
170
171static int mana_gd_allocate_doorbell_page(struct gdma_context *gc,
172 int *doorbell_page)
173{
174 struct gdma_allocate_resource_range_req req = {};
175 struct gdma_allocate_resource_range_resp resp = {};
176 int err;
177
178 mana_gd_init_req_hdr(&req.hdr, GDMA_ALLOCATE_RESOURCE_RANGE,
179 sizeof(req), sizeof(resp));
180
181 req.resource_type = GDMA_RESOURCE_DOORBELL_PAGE;
182 req.num_resources = 1;
183 req.alignment = 1;
184
185 /* Have GDMA start searching from 0 */
186 req.allocated_resources = 0;
187
188 err = mana_gd_send_request(gc, sizeof(req), &req, sizeof(resp), &resp);
189 if (err || resp.hdr.status) {
190 dev_err(gc->dev,
191 "Failed to allocate doorbell page: ret %d, 0x%x\n",
192 err, resp.hdr.status);
193 return err ?: -EPROTO;
194 }
195
196 *doorbell_page = resp.allocated_resources;
197
198 return 0;
199}
200
201int mana_ib_alloc_ucontext(struct ib_ucontext *ibcontext,
202 struct ib_udata *udata)
203{
204 struct mana_ib_ucontext *ucontext =
205 container_of(ibcontext, struct mana_ib_ucontext, ibucontext);
206 struct ib_device *ibdev = ibcontext->device;
207 struct mana_ib_dev *mdev;
208 struct gdma_context *gc;
209 struct gdma_dev *dev;
210 int doorbell_page;
211 int ret;
212
213 mdev = container_of(ibdev, struct mana_ib_dev, ib_dev);
214 dev = mdev->gdma_dev;
215 gc = dev->gdma_context;
216
217 /* Allocate a doorbell page index */
218 ret = mana_gd_allocate_doorbell_page(gc, &doorbell_page);
219 if (ret) {
220 ibdev_dbg(ibdev, "Failed to allocate doorbell page %d\n", ret);
221 return ret;
222 }
223
224 ibdev_dbg(ibdev, "Doorbell page allocated %d\n", doorbell_page);
225
226 ucontext->doorbell = doorbell_page;
227
228 return 0;
229}
230
231void mana_ib_dealloc_ucontext(struct ib_ucontext *ibcontext)
232{
233 struct mana_ib_ucontext *mana_ucontext =
234 container_of(ibcontext, struct mana_ib_ucontext, ibucontext);
235 struct ib_device *ibdev = ibcontext->device;
236 struct mana_ib_dev *mdev;
237 struct gdma_context *gc;
238 int ret;
239
240 mdev = container_of(ibdev, struct mana_ib_dev, ib_dev);
241 gc = mdev->gdma_dev->gdma_context;
242
243 ret = mana_gd_destroy_doorbell_page(gc, mana_ucontext->doorbell);
244 if (ret)
245 ibdev_dbg(ibdev, "Failed to destroy doorbell page %d\n", ret);
246}
247
248static int
249mana_ib_gd_first_dma_region(struct mana_ib_dev *dev,
250 struct gdma_context *gc,
251 struct gdma_create_dma_region_req *create_req,
252 size_t num_pages, mana_handle_t *gdma_region)
253{
254 struct gdma_create_dma_region_resp create_resp = {};
255 unsigned int create_req_msg_size;
256 int err;
257
258 create_req_msg_size =
259 struct_size(create_req, page_addr_list, num_pages);
260 create_req->page_addr_list_len = num_pages;
261
262 err = mana_gd_send_request(gc, create_req_msg_size, create_req,
263 sizeof(create_resp), &create_resp);
264 if (err || create_resp.hdr.status) {
265 ibdev_dbg(&dev->ib_dev,
266 "Failed to create DMA region: %d, 0x%x\n",
267 err, create_resp.hdr.status);
268 if (!err)
269 err = -EPROTO;
270
271 return err;
272 }
273
274 *gdma_region = create_resp.dma_region_handle;
275 ibdev_dbg(&dev->ib_dev, "Created DMA region handle 0x%llx\n",
276 *gdma_region);
277
278 return 0;
279}
280
281static int
282mana_ib_gd_add_dma_region(struct mana_ib_dev *dev, struct gdma_context *gc,
283 struct gdma_dma_region_add_pages_req *add_req,
284 unsigned int num_pages, u32 expected_status)
285{
286 unsigned int add_req_msg_size =
287 struct_size(add_req, page_addr_list, num_pages);
288 struct gdma_general_resp add_resp = {};
289 int err;
290
291 mana_gd_init_req_hdr(&add_req->hdr, GDMA_DMA_REGION_ADD_PAGES,
292 add_req_msg_size, sizeof(add_resp));
293 add_req->page_addr_list_len = num_pages;
294
295 err = mana_gd_send_request(gc, add_req_msg_size, add_req,
296 sizeof(add_resp), &add_resp);
297 if (err || add_resp.hdr.status != expected_status) {
298 ibdev_dbg(&dev->ib_dev,
299 "Failed to create DMA region: %d, 0x%x\n",
300 err, add_resp.hdr.status);
301
302 if (!err)
303 err = -EPROTO;
304
305 return err;
306 }
307
308 return 0;
309}
310
311int mana_ib_gd_create_dma_region(struct mana_ib_dev *dev, struct ib_umem *umem,
312 mana_handle_t *gdma_region)
313{
314 struct gdma_dma_region_add_pages_req *add_req = NULL;
315 size_t num_pages_processed = 0, num_pages_to_handle;
316 struct gdma_create_dma_region_req *create_req;
317 unsigned int create_req_msg_size;
318 struct hw_channel_context *hwc;
319 struct ib_block_iter biter;
320 size_t max_pgs_add_cmd = 0;
321 size_t max_pgs_create_cmd;
322 struct gdma_context *gc;
323 size_t num_pages_total;
324 struct gdma_dev *mdev;
325 unsigned long page_sz;
326 unsigned int tail = 0;
327 u64 *page_addr_list;
328 void *request_buf;
329 int err;
330
331 mdev = dev->gdma_dev;
332 gc = mdev->gdma_context;
333 hwc = gc->hwc.driver_data;
334
335 /* Hardware requires dma region to align to chosen page size */
336 page_sz = ib_umem_find_best_pgsz(umem, PAGE_SZ_BM, 0);
337 if (!page_sz) {
338 ibdev_dbg(&dev->ib_dev, "failed to find page size.\n");
339 return -ENOMEM;
340 }
341 num_pages_total = ib_umem_num_dma_blocks(umem, page_sz);
342
343 max_pgs_create_cmd =
344 (hwc->max_req_msg_size - sizeof(*create_req)) / sizeof(u64);
345 num_pages_to_handle =
346 min_t(size_t, num_pages_total, max_pgs_create_cmd);
347 create_req_msg_size =
348 struct_size(create_req, page_addr_list, num_pages_to_handle);
349
350 request_buf = kzalloc(hwc->max_req_msg_size, GFP_KERNEL);
351 if (!request_buf)
352 return -ENOMEM;
353
354 create_req = request_buf;
355 mana_gd_init_req_hdr(&create_req->hdr, GDMA_CREATE_DMA_REGION,
356 create_req_msg_size,
357 sizeof(struct gdma_create_dma_region_resp));
358
359 create_req->length = umem->length;
360 create_req->offset_in_page = umem->address & (page_sz - 1);
361 create_req->gdma_page_type = order_base_2(page_sz) - PAGE_SHIFT;
362 create_req->page_count = num_pages_total;
363
364 ibdev_dbg(&dev->ib_dev, "size_dma_region %lu num_pages_total %lu\n",
365 umem->length, num_pages_total);
366
367 ibdev_dbg(&dev->ib_dev, "page_sz %lu offset_in_page %u\n",
368 page_sz, create_req->offset_in_page);
369
370 ibdev_dbg(&dev->ib_dev, "num_pages_to_handle %lu, gdma_page_type %u",
371 num_pages_to_handle, create_req->gdma_page_type);
372
373 page_addr_list = create_req->page_addr_list;
374 rdma_umem_for_each_dma_block(umem, &biter, page_sz) {
375 page_addr_list[tail++] = rdma_block_iter_dma_address(&biter);
376 if (tail < num_pages_to_handle)
377 continue;
378
379 if (!num_pages_processed) {
380 /* First create message */
381 err = mana_ib_gd_first_dma_region(dev, gc, create_req,
382 tail, gdma_region);
383 if (err)
384 goto out;
385
386 max_pgs_add_cmd = (hwc->max_req_msg_size -
387 sizeof(*add_req)) / sizeof(u64);
388
389 add_req = request_buf;
390 add_req->dma_region_handle = *gdma_region;
391 add_req->reserved3 = 0;
392 page_addr_list = add_req->page_addr_list;
393 } else {
394 /* Subsequent create messages */
395 u32 expected_s = 0;
396
397 if (num_pages_processed + num_pages_to_handle <
398 num_pages_total)
399 expected_s = GDMA_STATUS_MORE_ENTRIES;
400
401 err = mana_ib_gd_add_dma_region(dev, gc, add_req, tail,
402 expected_s);
403 if (err)
404 break;
405 }
406
407 num_pages_processed += tail;
408 tail = 0;
409
410 /* The remaining pages to create */
411 num_pages_to_handle =
412 min_t(size_t,
413 num_pages_total - num_pages_processed,
414 max_pgs_add_cmd);
415 }
416
417 if (err)
418 mana_ib_gd_destroy_dma_region(dev, *gdma_region);
419
420out:
421 kfree(request_buf);
422 return err;
423}
424
425int mana_ib_gd_destroy_dma_region(struct mana_ib_dev *dev, u64 gdma_region)
426{
427 struct gdma_dev *mdev = dev->gdma_dev;
428 struct gdma_context *gc;
429
430 gc = mdev->gdma_context;
431 ibdev_dbg(&dev->ib_dev, "destroy dma region 0x%llx\n", gdma_region);
432
433 return mana_gd_destroy_dma_region(gc, gdma_region);
434}
435
436int mana_ib_mmap(struct ib_ucontext *ibcontext, struct vm_area_struct *vma)
437{
438 struct mana_ib_ucontext *mana_ucontext =
439 container_of(ibcontext, struct mana_ib_ucontext, ibucontext);
440 struct ib_device *ibdev = ibcontext->device;
441 struct mana_ib_dev *mdev;
442 struct gdma_context *gc;
443 phys_addr_t pfn;
444 pgprot_t prot;
445 int ret;
446
447 mdev = container_of(ibdev, struct mana_ib_dev, ib_dev);
448 gc = mdev->gdma_dev->gdma_context;
449
450 if (vma->vm_pgoff != 0) {
451 ibdev_dbg(ibdev, "Unexpected vm_pgoff %lu\n", vma->vm_pgoff);
452 return -EINVAL;
453 }
454
455 /* Map to the page indexed by ucontext->doorbell */
456 pfn = (gc->phys_db_page_base +
457 gc->db_page_size * mana_ucontext->doorbell) >>
458 PAGE_SHIFT;
459 prot = pgprot_writecombine(vma->vm_page_prot);
460
461 ret = rdma_user_mmap_io(ibcontext, vma, pfn, gc->db_page_size, prot,
462 NULL);
463 if (ret)
464 ibdev_dbg(ibdev, "can't rdma_user_mmap_io ret %d\n", ret);
465 else
466 ibdev_dbg(ibdev, "mapped I/O pfn 0x%llx page_size %u, ret %d\n",
467 pfn, gc->db_page_size, ret);
468
469 return ret;
470}
471
472int mana_ib_get_port_immutable(struct ib_device *ibdev, u32 port_num,
473 struct ib_port_immutable *immutable)
474{
475 /*
476 * This version only support RAW_PACKET
477 * other values need to be filled for other types
478 */
479 immutable->core_cap_flags = RDMA_CORE_PORT_RAW_PACKET;
480
481 return 0;
482}
483
484int mana_ib_query_device(struct ib_device *ibdev, struct ib_device_attr *props,
485 struct ib_udata *uhw)
486{
487 props->max_qp = MANA_MAX_NUM_QUEUES;
488 props->max_qp_wr = MAX_SEND_BUFFERS_PER_QUEUE;
489
490 /*
491 * max_cqe could be potentially much bigger.
492 * As this version of driver only support RAW QP, set it to the same
493 * value as max_qp_wr
494 */
495 props->max_cqe = MAX_SEND_BUFFERS_PER_QUEUE;
496
497 props->max_mr_size = MANA_IB_MAX_MR_SIZE;
498 props->max_mr = MANA_IB_MAX_MR;
499 props->max_send_sge = MAX_TX_WQE_SGL_ENTRIES;
500 props->max_recv_sge = MAX_RX_WQE_SGL_ENTRIES;
501
502 return 0;
503}
504
505int mana_ib_query_port(struct ib_device *ibdev, u32 port,
506 struct ib_port_attr *props)
507{
508 /* This version doesn't return port properties */
509 return 0;
510}
511
512int mana_ib_query_gid(struct ib_device *ibdev, u32 port, int index,
513 union ib_gid *gid)
514{
515 /* This version doesn't return GID properties */
516 return 0;
517}
518
519void mana_ib_disassociate_ucontext(struct ib_ucontext *ibcontext)
520{
521}