1 /*
2 * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 */
33
34 #include "mlx4_ib.h"
35
36 static u32 convert_access(int acc)
37 {
38 return (acc & IB_ACCESS_REMOTE_ATOMIC ? MLX4_PERM_ATOMIC : 0) |
39 (acc & IB_ACCESS_REMOTE_WRITE ? MLX4_PERM_REMOTE_WRITE : 0) |
40 (acc & IB_ACCESS_REMOTE_READ ? MLX4_PERM_REMOTE_READ : 0) |
41 (acc & IB_ACCESS_LOCAL_WRITE ? MLX4_PERM_LOCAL_WRITE : 0) |
42 MLX4_PERM_LOCAL_READ;
43 }
44
45 struct ib_mr *mlx4_ib_get_dma_mr(struct ib_pd *pd, int acc)
46 {
47 struct mlx4_ib_mr *mr;
48 int err;
49
50 mr = kmalloc(sizeof *mr, GFP_KERNEL);
51 if (!mr)
52 return ERR_PTR(-ENOMEM);
53
54 err = mlx4_mr_alloc(to_mdev(pd->device)->dev, to_mpd(pd)->pdn, 0,
55 ~0ull, convert_access(acc), 0, 0, &mr->mmr);
56 if (err)
57 goto err_free;
58
59 err = mlx4_mr_enable(to_mdev(pd->device)->dev, &mr->mmr);
60 if (err)
61 goto err_mr;
62
63 mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key;
64 mr->umem = NULL;
65
66 return &mr->ibmr;
67
68 err_mr:
69 mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr);
70
71 err_free:
72 kfree(mr);
73
74 return ERR_PTR(err);
75 }
76
77 int mlx4_ib_umem_write_mtt(struct mlx4_ib_dev *dev, struct mlx4_mtt *mtt,
78 struct ib_umem *umem)
79 {
80 u64 *pages;
81 struct ib_umem_chunk *chunk;
82 int i, j, k;
83 int n;
84 int len;
85 int err = 0;
86
87 pages = (u64 *) __get_free_page(GFP_KERNEL);
88 if (!pages)
89 return -ENOMEM;
90
91 i = n = 0;
92
93 list_for_each_entry(chunk, &umem->chunk_list, list)
94 for (j = 0; j < chunk->nmap; ++j) {
95 len = sg_dma_len(&chunk->page_list[j]) >> mtt->page_shift;
96 for (k = 0; k < len; ++k) {
97 pages[i++] = sg_dma_address(&chunk->page_list[j]) +
98 umem->page_size * k;
99 /*
100 * Be friendly to mlx4_write_mtt() and
101 * pass it chunks of appropriate size.
102 */
103 if (i == PAGE_SIZE / sizeof (u64)) {
104 err = mlx4_write_mtt(dev->dev, mtt, n,
105 i, pages);
106 if (err)
107 goto out;
108 n += i;
109 i = 0;
110 }
111 }
112 }
113
114 if (i)
115 err = mlx4_write_mtt(dev->dev, mtt, n, i, pages);
116
117 out:
118 free_page((unsigned long) pages);
119 return err;
120 }
121
122 struct ib_mr *mlx4_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
123 u64 virt_addr, int access_flags,
124 struct ib_udata *udata)
125 {
126 struct mlx4_ib_dev *dev = to_mdev(pd->device);
127 struct mlx4_ib_mr *mr;
128 int shift;
129 int err;
130 int n;
131
132 mr = kmalloc(sizeof *mr, GFP_KERNEL);
133 if (!mr)
134 return ERR_PTR(-ENOMEM);
135
136 mr->umem = ib_umem_get(pd->uobject->context, start, length,
137 access_flags, 0);
138 if (IS_ERR(mr->umem)) {
139 err = PTR_ERR(mr->umem);
140 goto err_free;
141 }
142
143 n = ib_umem_page_count(mr->umem);
144 shift = ilog2(mr->umem->page_size);
145
146 err = mlx4_mr_alloc(dev->dev, to_mpd(pd)->pdn, virt_addr, length,
147 convert_access(access_flags), n, shift, &mr->mmr);
148 if (err)
149 goto err_umem;
150
151 err = mlx4_ib_umem_write_mtt(dev, &mr->mmr.mtt, mr->umem);
152 if (err)
153 goto err_mr;
154
155 err = mlx4_mr_enable(dev->dev, &mr->mmr);
156 if (err)
157 goto err_mr;
158
159 mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key;
160
161 return &mr->ibmr;
162
163 err_mr:
164 mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr);
165
166 err_umem:
167 ib_umem_release(mr->umem);
168
169 err_free:
170 kfree(mr);
171
172 return ERR_PTR(err);
173 }
174
175 int mlx4_ib_dereg_mr(struct ib_mr *ibmr)
176 {
177 struct mlx4_ib_mr *mr = to_mmr(ibmr);
178
179 mlx4_mr_free(to_mdev(ibmr->device)->dev, &mr->mmr);
180 if (mr->umem)
181 ib_umem_release(mr->umem);
182 kfree(mr);
183
184 return 0;
185 }
186
187 struct ib_mr *mlx4_ib_alloc_fast_reg_mr(struct ib_pd *pd,
188 int max_page_list_len)
189 {
190 struct mlx4_ib_dev *dev = to_mdev(pd->device);
191 struct mlx4_ib_mr *mr;
192 int err;
193
194 mr = kmalloc(sizeof *mr, GFP_KERNEL);
195 if (!mr)
196 return ERR_PTR(-ENOMEM);
197
198 err = mlx4_mr_alloc(dev->dev, to_mpd(pd)->pdn, 0, 0, 0,
199 max_page_list_len, 0, &mr->mmr);
200 if (err)
201 goto err_free;
202
203 err = mlx4_mr_enable(dev->dev, &mr->mmr);
204 if (err)
205 goto err_mr;
206
207 mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key;
208 mr->umem = NULL;
209
210 return &mr->ibmr;
211
212 err_mr:
213 mlx4_mr_free(dev->dev, &mr->mmr);
214
215 err_free:
216 kfree(mr);
217 return ERR_PTR(err);
218 }
219
220 struct ib_fast_reg_page_list *mlx4_ib_alloc_fast_reg_page_list(struct ib_device *ibdev,
221 int page_list_len)
222 {
223 struct mlx4_ib_dev *dev = to_mdev(ibdev);
224 struct mlx4_ib_fast_reg_page_list *mfrpl;
225 int size = page_list_len * sizeof (u64);
226
227 if (size > PAGE_SIZE)
228 return ERR_PTR(-EINVAL);
229
230 mfrpl = kmalloc(sizeof *mfrpl, GFP_KERNEL);
231 if (!mfrpl)
232 return ERR_PTR(-ENOMEM);
233
234 mfrpl->ibfrpl.page_list = kmalloc(size, GFP_KERNEL);
235 if (!mfrpl->ibfrpl.page_list)
236 goto err_free;
237
238 mfrpl->mapped_page_list = dma_alloc_coherent(&dev->dev->pdev->dev,
239 size, &mfrpl->map,
240 GFP_KERNEL);
241 if (!mfrpl->ibfrpl.page_list)
242 goto err_free;
243
244 WARN_ON(mfrpl->map & 0x3f);
245
246 return &mfrpl->ibfrpl;
247
248 err_free:
249 kfree(mfrpl->ibfrpl.page_list);
250 kfree(mfrpl);
251 return ERR_PTR(-ENOMEM);
252 }
253
254 void mlx4_ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list)
255 {
256 struct mlx4_ib_dev *dev = to_mdev(page_list->device);
257 struct mlx4_ib_fast_reg_page_list *mfrpl = to_mfrpl(page_list);
258 int size = page_list->max_page_list_len * sizeof (u64);
259
260 dma_free_coherent(&dev->dev->pdev->dev, size, mfrpl->mapped_page_list,
261 mfrpl->map);
262 kfree(mfrpl->ibfrpl.page_list);
263 kfree(mfrpl);
264 }
265
266 struct ib_fmr *mlx4_ib_fmr_alloc(struct ib_pd *pd, int acc,
267 struct ib_fmr_attr *fmr_attr)
268 {
269 struct mlx4_ib_dev *dev = to_mdev(pd->device);
270 struct mlx4_ib_fmr *fmr;
271 int err = -ENOMEM;
272
273 fmr = kmalloc(sizeof *fmr, GFP_KERNEL);
274 if (!fmr)
275 return ERR_PTR(-ENOMEM);
276
277 err = mlx4_fmr_alloc(dev->dev, to_mpd(pd)->pdn, convert_access(acc),
278 fmr_attr->max_pages, fmr_attr->max_maps,
279 fmr_attr->page_shift, &fmr->mfmr);
280 if (err)
281 goto err_free;
282
283 err = mlx4_fmr_enable(to_mdev(pd->device)->dev, &fmr->mfmr);
284 if (err)
285 goto err_mr;
286
287 fmr->ibfmr.rkey = fmr->ibfmr.lkey = fmr->mfmr.mr.key;
288
289 return &fmr->ibfmr;
290
291 err_mr:
292 mlx4_mr_free(to_mdev(pd->device)->dev, &fmr->mfmr.mr);
293
294 err_free:
295 kfree(fmr);
296
297 return ERR_PTR(err);
298 }
299
300 int mlx4_ib_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
301 int npages, u64 iova)
302 {
303 struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr);
304 struct mlx4_ib_dev *dev = to_mdev(ifmr->ibfmr.device);
305
306 return mlx4_map_phys_fmr(dev->dev, &ifmr->mfmr, page_list, npages, iova,
307 &ifmr->ibfmr.lkey, &ifmr->ibfmr.rkey);
308 }
309
310 int mlx4_ib_unmap_fmr(struct list_head *fmr_list)
311 {
312 struct ib_fmr *ibfmr;
313 int err;
314 struct mlx4_dev *mdev = NULL;
315
316 list_for_each_entry(ibfmr, fmr_list, list) {
317 if (mdev && to_mdev(ibfmr->device)->dev != mdev)
318 return -EINVAL;
319 mdev = to_mdev(ibfmr->device)->dev;
320 }
321
322 if (!mdev)
323 return 0;
324
325 list_for_each_entry(ibfmr, fmr_list, list) {
326 struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr);
327
328 mlx4_fmr_unmap(mdev, &ifmr->mfmr, &ifmr->ibfmr.lkey, &ifmr->ibfmr.rkey);
329 }
330
331 /*
332 * Make sure all MPT status updates are visible before issuing
333 * SYNC_TPT firmware command.
334 */
335 wmb();
336
337 err = mlx4_SYNC_TPT(mdev);
338 if (err)
339 printk(KERN_WARNING "mlx4_ib: SYNC_TPT error %d when "
340 "unmapping FMRs\n", err);
341
342 return 0;
343 }
344
345 int mlx4_ib_fmr_dealloc(struct ib_fmr *ibfmr)
346 {
347 struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr);
348 struct mlx4_ib_dev *dev = to_mdev(ibfmr->device);
349 int err;
350
351 err = mlx4_fmr_free(dev->dev, &ifmr->mfmr);
352
353 if (!err)
354 kfree(ifmr);
355
356 return err;
357 }
358
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