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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 MLX4_PERM_LOCAL_READ;
45}
46
47struct 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
70err_mr:
71 mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr);
72
73err_free:
74 kfree(mr);
75
76 return ERR_PTR(err);
77}
78
79int 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
102
103
104
105 if (i == PAGE_SIZE / sizeof (u64)) {
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
119out:
120 free_page((unsigned long) pages);
121 return err;
122}
123
124struct 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
138 mr->umem = ib_umem_get(pd->uobject->context, start, length,
139 access_flags, 0);
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
165err_mr:
166 mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr);
167
168err_umem:
169 ib_umem_release(mr->umem);
170
171err_free:
172 kfree(mr);
173
174 return ERR_PTR(err);
175}
176
177int 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}
188
189struct 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
209 mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key;
210 mr->umem = NULL;
211
212 return &mr->ibmr;
213
214err_mr:
215 mlx4_mr_free(dev->dev, &mr->mmr);
216
217err_free:
218 kfree(mr);
219 return ERR_PTR(err);
220}
221
222struct 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 (page_list_len > MLX4_MAX_FAST_REG_PAGES)
230 return ERR_PTR(-EINVAL);
231
232 mfrpl = kmalloc(sizeof *mfrpl, GFP_KERNEL);
233 if (!mfrpl)
234 return ERR_PTR(-ENOMEM);
235
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,
241 size, &mfrpl->map,
242 GFP_KERNEL);
243 if (!mfrpl->mapped_page_list)
244 goto err_free;
245
246 WARN_ON(mfrpl->map & 0x3f);
247
248 return &mfrpl->ibfrpl;
249
250err_free:
251 kfree(mfrpl->ibfrpl.page_list);
252 kfree(mfrpl);
253 return ERR_PTR(-ENOMEM);
254}
255
256void 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
262 dma_free_coherent(&dev->dev->pdev->dev, size, mfrpl->mapped_page_list,
263 mfrpl->map);
264 kfree(mfrpl->ibfrpl.page_list);
265 kfree(mfrpl);
266}
267
268struct 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
285 err = mlx4_fmr_enable(to_mdev(pd->device)->dev, &fmr->mfmr);
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
293err_mr:
294 mlx4_mr_free(to_mdev(pd->device)->dev, &fmr->mfmr.mr);
295
296err_free:
297 kfree(fmr);
298
299 return ERR_PTR(err);
300}
301
302int 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
312int 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
335
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
347int 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}
360
