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225c7b1f RD |
1 | /* |
2 | * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved. | |
51a379d0 | 3 | * Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved. |
225c7b1f RD |
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 | ||
5a0e3ad6 TH |
34 | #include <linux/slab.h> |
35 | ||
225c7b1f RD |
36 | #include "mlx4_ib.h" |
37 | ||
38 | static 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 | MLX4_PERM_LOCAL_READ; | |
45 | } | |
46 | ||
47 | struct ib_mr *mlx4_ib_get_dma_mr(struct ib_pd *pd, int acc) | |
48 | { | |
49 | struct mlx4_ib_mr *mr; | |
50 | int err; | |
51 | ||
52 | mr = kmalloc(sizeof *mr, GFP_KERNEL); | |
53 | if (!mr) | |
54 | return ERR_PTR(-ENOMEM); | |
55 | ||
56 | err = mlx4_mr_alloc(to_mdev(pd->device)->dev, to_mpd(pd)->pdn, 0, | |
57 | ~0ull, convert_access(acc), 0, 0, &mr->mmr); | |
58 | if (err) | |
59 | goto err_free; | |
60 | ||
61 | err = mlx4_mr_enable(to_mdev(pd->device)->dev, &mr->mmr); | |
62 | if (err) | |
63 | goto err_mr; | |
64 | ||
65 | mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key; | |
66 | mr->umem = NULL; | |
67 | ||
68 | return &mr->ibmr; | |
69 | ||
70 | err_mr: | |
71 | mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr); | |
72 | ||
73 | err_free: | |
74 | kfree(mr); | |
75 | ||
76 | return ERR_PTR(err); | |
77 | } | |
78 | ||
79 | int mlx4_ib_umem_write_mtt(struct mlx4_ib_dev *dev, struct mlx4_mtt *mtt, | |
80 | struct ib_umem *umem) | |
81 | { | |
82 | u64 *pages; | |
83 | struct ib_umem_chunk *chunk; | |
84 | int i, j, k; | |
85 | int n; | |
86 | int len; | |
87 | int err = 0; | |
88 | ||
89 | pages = (u64 *) __get_free_page(GFP_KERNEL); | |
90 | if (!pages) | |
91 | return -ENOMEM; | |
92 | ||
93 | i = n = 0; | |
94 | ||
95 | list_for_each_entry(chunk, &umem->chunk_list, list) | |
96 | for (j = 0; j < chunk->nmap; ++j) { | |
97 | len = sg_dma_len(&chunk->page_list[j]) >> mtt->page_shift; | |
98 | for (k = 0; k < len; ++k) { | |
99 | pages[i++] = sg_dma_address(&chunk->page_list[j]) + | |
100 | umem->page_size * k; | |
101 | /* | |
d7bb58fb JM |
102 | * Be friendly to mlx4_write_mtt() and |
103 | * pass it chunks of appropriate size. | |
225c7b1f | 104 | */ |
d7bb58fb | 105 | if (i == PAGE_SIZE / sizeof (u64)) { |
225c7b1f RD |
106 | err = mlx4_write_mtt(dev->dev, mtt, n, |
107 | i, pages); | |
108 | if (err) | |
109 | goto out; | |
110 | n += i; | |
111 | i = 0; | |
112 | } | |
113 | } | |
114 | } | |
115 | ||
116 | if (i) | |
117 | err = mlx4_write_mtt(dev->dev, mtt, n, i, pages); | |
118 | ||
119 | out: | |
120 | free_page((unsigned long) pages); | |
121 | return err; | |
122 | } | |
123 | ||
124 | struct ib_mr *mlx4_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, | |
125 | u64 virt_addr, int access_flags, | |
126 | struct ib_udata *udata) | |
127 | { | |
128 | struct mlx4_ib_dev *dev = to_mdev(pd->device); | |
129 | struct mlx4_ib_mr *mr; | |
130 | int shift; | |
131 | int err; | |
132 | int n; | |
133 | ||
134 | mr = kmalloc(sizeof *mr, GFP_KERNEL); | |
135 | if (!mr) | |
136 | return ERR_PTR(-ENOMEM); | |
137 | ||
cb9fbc5c AK |
138 | mr->umem = ib_umem_get(pd->uobject->context, start, length, |
139 | access_flags, 0); | |
225c7b1f RD |
140 | if (IS_ERR(mr->umem)) { |
141 | err = PTR_ERR(mr->umem); | |
142 | goto err_free; | |
143 | } | |
144 | ||
145 | n = ib_umem_page_count(mr->umem); | |
146 | shift = ilog2(mr->umem->page_size); | |
147 | ||
148 | err = mlx4_mr_alloc(dev->dev, to_mpd(pd)->pdn, virt_addr, length, | |
149 | convert_access(access_flags), n, shift, &mr->mmr); | |
150 | if (err) | |
151 | goto err_umem; | |
152 | ||
153 | err = mlx4_ib_umem_write_mtt(dev, &mr->mmr.mtt, mr->umem); | |
154 | if (err) | |
155 | goto err_mr; | |
156 | ||
157 | err = mlx4_mr_enable(dev->dev, &mr->mmr); | |
158 | if (err) | |
159 | goto err_mr; | |
160 | ||
161 | mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key; | |
162 | ||
163 | return &mr->ibmr; | |
164 | ||
165 | err_mr: | |
166 | mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr); | |
167 | ||
168 | err_umem: | |
169 | ib_umem_release(mr->umem); | |
170 | ||
171 | err_free: | |
172 | kfree(mr); | |
173 | ||
174 | return ERR_PTR(err); | |
175 | } | |
176 | ||
177 | int mlx4_ib_dereg_mr(struct ib_mr *ibmr) | |
178 | { | |
179 | struct mlx4_ib_mr *mr = to_mmr(ibmr); | |
180 | ||
181 | mlx4_mr_free(to_mdev(ibmr->device)->dev, &mr->mmr); | |
182 | if (mr->umem) | |
183 | ib_umem_release(mr->umem); | |
184 | kfree(mr); | |
185 | ||
186 | return 0; | |
187 | } | |
8ad11fb6 | 188 | |
95d04f07 RD |
189 | struct ib_mr *mlx4_ib_alloc_fast_reg_mr(struct ib_pd *pd, |
190 | int max_page_list_len) | |
191 | { | |
192 | struct mlx4_ib_dev *dev = to_mdev(pd->device); | |
193 | struct mlx4_ib_mr *mr; | |
194 | int err; | |
195 | ||
196 | mr = kmalloc(sizeof *mr, GFP_KERNEL); | |
197 | if (!mr) | |
198 | return ERR_PTR(-ENOMEM); | |
199 | ||
200 | err = mlx4_mr_alloc(dev->dev, to_mpd(pd)->pdn, 0, 0, 0, | |
201 | max_page_list_len, 0, &mr->mmr); | |
202 | if (err) | |
203 | goto err_free; | |
204 | ||
205 | err = mlx4_mr_enable(dev->dev, &mr->mmr); | |
206 | if (err) | |
207 | goto err_mr; | |
208 | ||
4c246edd | 209 | mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key; |
7f3abf5c | 210 | mr->umem = NULL; |
4c246edd | 211 | |
95d04f07 RD |
212 | return &mr->ibmr; |
213 | ||
214 | err_mr: | |
215 | mlx4_mr_free(dev->dev, &mr->mmr); | |
216 | ||
217 | err_free: | |
218 | kfree(mr); | |
219 | return ERR_PTR(err); | |
220 | } | |
221 | ||
222 | struct ib_fast_reg_page_list *mlx4_ib_alloc_fast_reg_page_list(struct ib_device *ibdev, | |
223 | int page_list_len) | |
224 | { | |
225 | struct mlx4_ib_dev *dev = to_mdev(ibdev); | |
226 | struct mlx4_ib_fast_reg_page_list *mfrpl; | |
227 | int size = page_list_len * sizeof (u64); | |
228 | ||
229 | if (size > PAGE_SIZE) | |
230 | return ERR_PTR(-EINVAL); | |
231 | ||
232 | mfrpl = kmalloc(sizeof *mfrpl, GFP_KERNEL); | |
233 | if (!mfrpl) | |
234 | return ERR_PTR(-ENOMEM); | |
235 | ||
2b6b7d4b JM |
236 | mfrpl->ibfrpl.page_list = kmalloc(size, GFP_KERNEL); |
237 | if (!mfrpl->ibfrpl.page_list) | |
238 | goto err_free; | |
239 | ||
240 | mfrpl->mapped_page_list = dma_alloc_coherent(&dev->dev->pdev->dev, | |
95d04f07 RD |
241 | size, &mfrpl->map, |
242 | GFP_KERNEL); | |
243 | if (!mfrpl->ibfrpl.page_list) | |
244 | goto err_free; | |
245 | ||
246 | WARN_ON(mfrpl->map & 0x3f); | |
247 | ||
248 | return &mfrpl->ibfrpl; | |
249 | ||
250 | err_free: | |
2b6b7d4b | 251 | kfree(mfrpl->ibfrpl.page_list); |
95d04f07 RD |
252 | kfree(mfrpl); |
253 | return ERR_PTR(-ENOMEM); | |
254 | } | |
255 | ||
256 | void mlx4_ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list) | |
257 | { | |
258 | struct mlx4_ib_dev *dev = to_mdev(page_list->device); | |
259 | struct mlx4_ib_fast_reg_page_list *mfrpl = to_mfrpl(page_list); | |
260 | int size = page_list->max_page_list_len * sizeof (u64); | |
261 | ||
2b6b7d4b | 262 | dma_free_coherent(&dev->dev->pdev->dev, size, mfrpl->mapped_page_list, |
95d04f07 | 263 | mfrpl->map); |
2b6b7d4b | 264 | kfree(mfrpl->ibfrpl.page_list); |
95d04f07 RD |
265 | kfree(mfrpl); |
266 | } | |
267 | ||
8ad11fb6 JM |
268 | struct ib_fmr *mlx4_ib_fmr_alloc(struct ib_pd *pd, int acc, |
269 | struct ib_fmr_attr *fmr_attr) | |
270 | { | |
271 | struct mlx4_ib_dev *dev = to_mdev(pd->device); | |
272 | struct mlx4_ib_fmr *fmr; | |
273 | int err = -ENOMEM; | |
274 | ||
275 | fmr = kmalloc(sizeof *fmr, GFP_KERNEL); | |
276 | if (!fmr) | |
277 | return ERR_PTR(-ENOMEM); | |
278 | ||
279 | err = mlx4_fmr_alloc(dev->dev, to_mpd(pd)->pdn, convert_access(acc), | |
280 | fmr_attr->max_pages, fmr_attr->max_maps, | |
281 | fmr_attr->page_shift, &fmr->mfmr); | |
282 | if (err) | |
283 | goto err_free; | |
284 | ||
e6028c0e | 285 | err = mlx4_fmr_enable(to_mdev(pd->device)->dev, &fmr->mfmr); |
8ad11fb6 JM |
286 | if (err) |
287 | goto err_mr; | |
288 | ||
289 | fmr->ibfmr.rkey = fmr->ibfmr.lkey = fmr->mfmr.mr.key; | |
290 | ||
291 | return &fmr->ibfmr; | |
292 | ||
293 | err_mr: | |
294 | mlx4_mr_free(to_mdev(pd->device)->dev, &fmr->mfmr.mr); | |
295 | ||
296 | err_free: | |
297 | kfree(fmr); | |
298 | ||
299 | return ERR_PTR(err); | |
300 | } | |
301 | ||
302 | int mlx4_ib_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list, | |
303 | int npages, u64 iova) | |
304 | { | |
305 | struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr); | |
306 | struct mlx4_ib_dev *dev = to_mdev(ifmr->ibfmr.device); | |
307 | ||
308 | return mlx4_map_phys_fmr(dev->dev, &ifmr->mfmr, page_list, npages, iova, | |
309 | &ifmr->ibfmr.lkey, &ifmr->ibfmr.rkey); | |
310 | } | |
311 | ||
312 | int mlx4_ib_unmap_fmr(struct list_head *fmr_list) | |
313 | { | |
314 | struct ib_fmr *ibfmr; | |
315 | int err; | |
316 | struct mlx4_dev *mdev = NULL; | |
317 | ||
318 | list_for_each_entry(ibfmr, fmr_list, list) { | |
319 | if (mdev && to_mdev(ibfmr->device)->dev != mdev) | |
320 | return -EINVAL; | |
321 | mdev = to_mdev(ibfmr->device)->dev; | |
322 | } | |
323 | ||
324 | if (!mdev) | |
325 | return 0; | |
326 | ||
327 | list_for_each_entry(ibfmr, fmr_list, list) { | |
328 | struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr); | |
329 | ||
330 | mlx4_fmr_unmap(mdev, &ifmr->mfmr, &ifmr->ibfmr.lkey, &ifmr->ibfmr.rkey); | |
331 | } | |
332 | ||
333 | /* | |
334 | * Make sure all MPT status updates are visible before issuing | |
335 | * SYNC_TPT firmware command. | |
336 | */ | |
337 | wmb(); | |
338 | ||
339 | err = mlx4_SYNC_TPT(mdev); | |
340 | if (err) | |
341 | printk(KERN_WARNING "mlx4_ib: SYNC_TPT error %d when " | |
342 | "unmapping FMRs\n", err); | |
343 | ||
344 | return 0; | |
345 | } | |
346 | ||
347 | int mlx4_ib_fmr_dealloc(struct ib_fmr *ibfmr) | |
348 | { | |
349 | struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr); | |
350 | struct mlx4_ib_dev *dev = to_mdev(ibfmr->device); | |
351 | int err; | |
352 | ||
353 | err = mlx4_fmr_free(dev->dev, &ifmr->mfmr); | |
354 | ||
355 | if (!err) | |
356 | kfree(ifmr); | |
357 | ||
358 | return err; | |
359 | } |