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34#include <linux/slab.h>
35
36#include "mlx4_ib.h"
37
38static u32 convert_access(int acc)
39{
40 return (acc & IB_ACCESS_REMOTE_ATOMIC ? MLX4_PERM_ATOMIC : 0) |
41 (acc & IB_ACCESS_REMOTE_WRITE ? MLX4_PERM_REMOTE_WRITE : 0) |
42 (acc & IB_ACCESS_REMOTE_READ ? MLX4_PERM_REMOTE_READ : 0) |
43 (acc & IB_ACCESS_LOCAL_WRITE ? MLX4_PERM_LOCAL_WRITE : 0) |
44 (acc & IB_ACCESS_MW_BIND ? MLX4_PERM_BIND_MW : 0) |
45 MLX4_PERM_LOCAL_READ;
46}
47
48static enum mlx4_mw_type to_mlx4_type(enum ib_mw_type type)
49{
50 switch (type) {
51 case IB_MW_TYPE_1: return MLX4_MW_TYPE_1;
52 case IB_MW_TYPE_2: return MLX4_MW_TYPE_2;
53 default: return -1;
54 }
55}
56
57struct ib_mr *mlx4_ib_get_dma_mr(struct ib_pd *pd, int acc)
58{
59 struct mlx4_ib_mr *mr;
60 int err;
61
62 mr = kmalloc(sizeof *mr, GFP_KERNEL);
63 if (!mr)
64 return ERR_PTR(-ENOMEM);
65
66 err = mlx4_mr_alloc(to_mdev(pd->device)->dev, to_mpd(pd)->pdn, 0,
67 ~0ull, convert_access(acc), 0, 0, &mr->mmr);
68 if (err)
69 goto err_free;
70
71 err = mlx4_mr_enable(to_mdev(pd->device)->dev, &mr->mmr);
72 if (err)
73 goto err_mr;
74
75 mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key;
76 mr->umem = NULL;
77
78 return &mr->ibmr;
79
80err_mr:
81 (void) mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr);
82
83err_free:
84 kfree(mr);
85
86 return ERR_PTR(err);
87}
88
89int mlx4_ib_umem_write_mtt(struct mlx4_ib_dev *dev, struct mlx4_mtt *mtt,
90 struct ib_umem *umem)
91{
92 u64 *pages;
93 struct ib_umem_chunk *chunk;
94 int i, j, k;
95 int n;
96 int len;
97 int err = 0;
98
99 pages = (u64 *) __get_free_page(GFP_KERNEL);
100 if (!pages)
101 return -ENOMEM;
102
103 i = n = 0;
104
105 list_for_each_entry(chunk, &umem->chunk_list, list)
106 for (j = 0; j < chunk->nmap; ++j) {
107 len = sg_dma_len(&chunk->page_list[j]) >> mtt->page_shift;
108 for (k = 0; k < len; ++k) {
109 pages[i++] = sg_dma_address(&chunk->page_list[j]) +
110 umem->page_size * k;
111
112
113
114
115 if (i == PAGE_SIZE / sizeof (u64)) {
116 err = mlx4_write_mtt(dev->dev, mtt, n,
117 i, pages);
118 if (err)
119 goto out;
120 n += i;
121 i = 0;
122 }
123 }
124 }
125
126 if (i)
127 err = mlx4_write_mtt(dev->dev, mtt, n, i, pages);
128
129out:
130 free_page((unsigned long) pages);
131 return err;
132}
133
134struct ib_mr *mlx4_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
135 u64 virt_addr, int access_flags,
136 struct ib_udata *udata)
137{
138 struct mlx4_ib_dev *dev = to_mdev(pd->device);
139 struct mlx4_ib_mr *mr;
140 int shift;
141 int err;
142 int n;
143
144 mr = kmalloc(sizeof *mr, GFP_KERNEL);
145 if (!mr)
146 return ERR_PTR(-ENOMEM);
147
148 mr->umem = ib_umem_get(pd->uobject->context, start, length,
149 access_flags, 0);
150 if (IS_ERR(mr->umem)) {
151 err = PTR_ERR(mr->umem);
152 goto err_free;
153 }
154
155 n = ib_umem_page_count(mr->umem);
156 shift = ilog2(mr->umem->page_size);
157
158 err = mlx4_mr_alloc(dev->dev, to_mpd(pd)->pdn, virt_addr, length,
159 convert_access(access_flags), n, shift, &mr->mmr);
160 if (err)
161 goto err_umem;
162
163 err = mlx4_ib_umem_write_mtt(dev, &mr->mmr.mtt, mr->umem);
164 if (err)
165 goto err_mr;
166
167 err = mlx4_mr_enable(dev->dev, &mr->mmr);
168 if (err)
169 goto err_mr;
170
171 mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key;
172
173 return &mr->ibmr;
174
175err_mr:
176 (void) mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr);
177
178err_umem:
179 ib_umem_release(mr->umem);
180
181err_free:
182 kfree(mr);
183
184 return ERR_PTR(err);
185}
186
187int mlx4_ib_dereg_mr(struct ib_mr *ibmr)
188{
189 struct mlx4_ib_mr *mr = to_mmr(ibmr);
190 int ret;
191
192 ret = mlx4_mr_free(to_mdev(ibmr->device)->dev, &mr->mmr);
193 if (ret)
194 return ret;
195 if (mr->umem)
196 ib_umem_release(mr->umem);
197 kfree(mr);
198
199 return 0;
200}
201
202struct ib_mw *mlx4_ib_alloc_mw(struct ib_pd *pd, enum ib_mw_type type)
203{
204 struct mlx4_ib_dev *dev = to_mdev(pd->device);
205 struct mlx4_ib_mw *mw;
206 int err;
207
208 mw = kmalloc(sizeof(*mw), GFP_KERNEL);
209 if (!mw)
210 return ERR_PTR(-ENOMEM);
211
212 err = mlx4_mw_alloc(dev->dev, to_mpd(pd)->pdn,
213 to_mlx4_type(type), &mw->mmw);
214 if (err)
215 goto err_free;
216
217 err = mlx4_mw_enable(dev->dev, &mw->mmw);
218 if (err)
219 goto err_mw;
220
221 mw->ibmw.rkey = mw->mmw.key;
222
223 return &mw->ibmw;
224
225err_mw:
226 mlx4_mw_free(dev->dev, &mw->mmw);
227
228err_free:
229 kfree(mw);
230
231 return ERR_PTR(err);
232}
233
234int mlx4_ib_bind_mw(struct ib_qp *qp, struct ib_mw *mw,
235 struct ib_mw_bind *mw_bind)
236{
237 struct ib_send_wr wr;
238 struct ib_send_wr *bad_wr;
239 int ret;
240
241 memset(&wr, 0, sizeof(wr));
242 wr.opcode = IB_WR_BIND_MW;
243 wr.wr_id = mw_bind->wr_id;
244 wr.send_flags = mw_bind->send_flags;
245 wr.wr.bind_mw.mw = mw;
246 wr.wr.bind_mw.bind_info = mw_bind->bind_info;
247 wr.wr.bind_mw.rkey = ib_inc_rkey(mw->rkey);
248
249 ret = mlx4_ib_post_send(qp, &wr, &bad_wr);
250 if (!ret)
251 mw->rkey = wr.wr.bind_mw.rkey;
252
253 return ret;
254}
255
256int mlx4_ib_dealloc_mw(struct ib_mw *ibmw)
257{
258 struct mlx4_ib_mw *mw = to_mmw(ibmw);
259
260 mlx4_mw_free(to_mdev(ibmw->device)->dev, &mw->mmw);
261 kfree(mw);
262
263 return 0;
264}
265
266struct ib_mr *mlx4_ib_alloc_fast_reg_mr(struct ib_pd *pd,
267 int max_page_list_len)
268{
269 struct mlx4_ib_dev *dev = to_mdev(pd->device);
270 struct mlx4_ib_mr *mr;
271 int err;
272
273 mr = kmalloc(sizeof *mr, GFP_KERNEL);
274 if (!mr)
275 return ERR_PTR(-ENOMEM);
276
277 err = mlx4_mr_alloc(dev->dev, to_mpd(pd)->pdn, 0, 0, 0,
278 max_page_list_len, 0, &mr->mmr);
279 if (err)
280 goto err_free;
281
282 err = mlx4_mr_enable(dev->dev, &mr->mmr);
283 if (err)
284 goto err_mr;
285
286 mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key;
287 mr->umem = NULL;
288
289 return &mr->ibmr;
290
291err_mr:
292 (void) mlx4_mr_free(dev->dev, &mr->mmr);
293
294err_free:
295 kfree(mr);
296 return ERR_PTR(err);
297}
298
299struct ib_fast_reg_page_list *mlx4_ib_alloc_fast_reg_page_list(struct ib_device *ibdev,
300 int page_list_len)
301{
302 struct mlx4_ib_dev *dev = to_mdev(ibdev);
303 struct mlx4_ib_fast_reg_page_list *mfrpl;
304 int size = page_list_len * sizeof (u64);
305
306 if (page_list_len > MLX4_MAX_FAST_REG_PAGES)
307 return ERR_PTR(-EINVAL);
308
309 mfrpl = kmalloc(sizeof *mfrpl, GFP_KERNEL);
310 if (!mfrpl)
311 return ERR_PTR(-ENOMEM);
312
313 mfrpl->ibfrpl.page_list = kmalloc(size, GFP_KERNEL);
314 if (!mfrpl->ibfrpl.page_list)
315 goto err_free;
316
317 mfrpl->mapped_page_list = dma_alloc_coherent(&dev->dev->pdev->dev,
318 size, &mfrpl->map,
319 GFP_KERNEL);
320 if (!mfrpl->mapped_page_list)
321 goto err_free;
322
323 WARN_ON(mfrpl->map & 0x3f);
324
325 return &mfrpl->ibfrpl;
326
327err_free:
328 kfree(mfrpl->ibfrpl.page_list);
329 kfree(mfrpl);
330 return ERR_PTR(-ENOMEM);
331}
332
333void mlx4_ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list)
334{
335 struct mlx4_ib_dev *dev = to_mdev(page_list->device);
336 struct mlx4_ib_fast_reg_page_list *mfrpl = to_mfrpl(page_list);
337 int size = page_list->max_page_list_len * sizeof (u64);
338
339 dma_free_coherent(&dev->dev->pdev->dev, size, mfrpl->mapped_page_list,
340 mfrpl->map);
341 kfree(mfrpl->ibfrpl.page_list);
342 kfree(mfrpl);
343}
344
345struct ib_fmr *mlx4_ib_fmr_alloc(struct ib_pd *pd, int acc,
346 struct ib_fmr_attr *fmr_attr)
347{
348 struct mlx4_ib_dev *dev = to_mdev(pd->device);
349 struct mlx4_ib_fmr *fmr;
350 int err = -ENOMEM;
351
352 fmr = kmalloc(sizeof *fmr, GFP_KERNEL);
353 if (!fmr)
354 return ERR_PTR(-ENOMEM);
355
356 err = mlx4_fmr_alloc(dev->dev, to_mpd(pd)->pdn, convert_access(acc),
357 fmr_attr->max_pages, fmr_attr->max_maps,
358 fmr_attr->page_shift, &fmr->mfmr);
359 if (err)
360 goto err_free;
361
362 err = mlx4_fmr_enable(to_mdev(pd->device)->dev, &fmr->mfmr);
363 if (err)
364 goto err_mr;
365
366 fmr->ibfmr.rkey = fmr->ibfmr.lkey = fmr->mfmr.mr.key;
367
368 return &fmr->ibfmr;
369
370err_mr:
371 (void) mlx4_mr_free(to_mdev(pd->device)->dev, &fmr->mfmr.mr);
372
373err_free:
374 kfree(fmr);
375
376 return ERR_PTR(err);
377}
378
379int mlx4_ib_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
380 int npages, u64 iova)
381{
382 struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr);
383 struct mlx4_ib_dev *dev = to_mdev(ifmr->ibfmr.device);
384
385 return mlx4_map_phys_fmr(dev->dev, &ifmr->mfmr, page_list, npages, iova,
386 &ifmr->ibfmr.lkey, &ifmr->ibfmr.rkey);
387}
388
389int mlx4_ib_unmap_fmr(struct list_head *fmr_list)
390{
391 struct ib_fmr *ibfmr;
392 int err;
393 struct mlx4_dev *mdev = NULL;
394
395 list_for_each_entry(ibfmr, fmr_list, list) {
396 if (mdev && to_mdev(ibfmr->device)->dev != mdev)
397 return -EINVAL;
398 mdev = to_mdev(ibfmr->device)->dev;
399 }
400
401 if (!mdev)
402 return 0;
403
404 list_for_each_entry(ibfmr, fmr_list, list) {
405 struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr);
406
407 mlx4_fmr_unmap(mdev, &ifmr->mfmr, &ifmr->ibfmr.lkey, &ifmr->ibfmr.rkey);
408 }
409
410
411
412
413
414 wmb();
415
416 err = mlx4_SYNC_TPT(mdev);
417 if (err)
418 pr_warn("SYNC_TPT error %d when "
419 "unmapping FMRs\n", err);
420
421 return 0;
422}
423
424int mlx4_ib_fmr_dealloc(struct ib_fmr *ibfmr)
425{
426 struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr);
427 struct mlx4_ib_dev *dev = to_mdev(ibfmr->device);
428 int err;
429
430 err = mlx4_fmr_free(dev->dev, &ifmr->mfmr);
431
432 if (!err)
433 kfree(ifmr);
434
435 return err;
436}
437
