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225c7b1f RD |
1 | /* |
2 | * Copyright (c) 2004 Topspin Communications. All rights reserved. | |
51a379d0 | 3 | * Copyright (c) 2005, 2006, 2007, 2008 Mellanox Technologies. All rights reserved. |
225c7b1f RD |
4 | * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved. |
5 | * | |
6 | * This software is available to you under a choice of one of two | |
7 | * licenses. You may choose to be licensed under the terms of the GNU | |
8 | * General Public License (GPL) Version 2, available from the file | |
9 | * COPYING in the main directory of this source tree, or the | |
10 | * OpenIB.org BSD license below: | |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or | |
13 | * without modification, are permitted provided that the following | |
14 | * conditions are met: | |
15 | * | |
16 | * - Redistributions of source code must retain the above | |
17 | * copyright notice, this list of conditions and the following | |
18 | * disclaimer. | |
19 | * | |
20 | * - Redistributions in binary form must reproduce the above | |
21 | * copyright notice, this list of conditions and the following | |
22 | * disclaimer in the documentation and/or other materials | |
23 | * provided with the distribution. | |
24 | * | |
25 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
26 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
27 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
28 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
29 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
30 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
31 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
32 | * SOFTWARE. | |
33 | */ | |
34 | ||
ea51b377 | 35 | #include <linux/init.h> |
225c7b1f | 36 | #include <linux/errno.h> |
ee40fa06 | 37 | #include <linux/export.h> |
5a0e3ad6 | 38 | #include <linux/slab.h> |
ea51b377 | 39 | #include <linux/kernel.h> |
225c7b1f RD |
40 | |
41 | #include <linux/mlx4/cmd.h> | |
42 | ||
43 | #include "mlx4.h" | |
44 | #include "icm.h" | |
45 | ||
225c7b1f | 46 | #define MLX4_MPT_FLAG_SW_OWNS (0xfUL << 28) |
95d04f07 | 47 | #define MLX4_MPT_FLAG_FREE (0x3UL << 28) |
225c7b1f RD |
48 | #define MLX4_MPT_FLAG_MIO (1 << 17) |
49 | #define MLX4_MPT_FLAG_BIND_ENABLE (1 << 15) | |
50 | #define MLX4_MPT_FLAG_PHYSICAL (1 << 9) | |
51 | #define MLX4_MPT_FLAG_REGION (1 << 8) | |
52 | ||
c9257433 VS |
53 | #define MLX4_MPT_PD_FLAG_FAST_REG (1 << 27) |
54 | #define MLX4_MPT_PD_FLAG_RAE (1 << 28) | |
95d04f07 RD |
55 | #define MLX4_MPT_PD_FLAG_EN_INV (3 << 24) |
56 | ||
8ad11fb6 JM |
57 | #define MLX4_MPT_STATUS_SW 0xF0 |
58 | #define MLX4_MPT_STATUS_HW 0x00 | |
59 | ||
225c7b1f RD |
60 | static u32 mlx4_buddy_alloc(struct mlx4_buddy *buddy, int order) |
61 | { | |
62 | int o; | |
63 | int m; | |
64 | u32 seg; | |
65 | ||
66 | spin_lock(&buddy->lock); | |
67 | ||
e4044cfc RD |
68 | for (o = order; o <= buddy->max_order; ++o) |
69 | if (buddy->num_free[o]) { | |
70 | m = 1 << (buddy->max_order - o); | |
71 | seg = find_first_bit(buddy->bits[o], m); | |
72 | if (seg < m) | |
73 | goto found; | |
74 | } | |
225c7b1f RD |
75 | |
76 | spin_unlock(&buddy->lock); | |
77 | return -1; | |
78 | ||
79 | found: | |
80 | clear_bit(seg, buddy->bits[o]); | |
e4044cfc | 81 | --buddy->num_free[o]; |
225c7b1f RD |
82 | |
83 | while (o > order) { | |
84 | --o; | |
85 | seg <<= 1; | |
86 | set_bit(seg ^ 1, buddy->bits[o]); | |
e4044cfc | 87 | ++buddy->num_free[o]; |
225c7b1f RD |
88 | } |
89 | ||
90 | spin_unlock(&buddy->lock); | |
91 | ||
92 | seg <<= order; | |
93 | ||
94 | return seg; | |
95 | } | |
96 | ||
97 | static void mlx4_buddy_free(struct mlx4_buddy *buddy, u32 seg, int order) | |
98 | { | |
99 | seg >>= order; | |
100 | ||
101 | spin_lock(&buddy->lock); | |
102 | ||
103 | while (test_bit(seg ^ 1, buddy->bits[order])) { | |
104 | clear_bit(seg ^ 1, buddy->bits[order]); | |
e4044cfc | 105 | --buddy->num_free[order]; |
225c7b1f RD |
106 | seg >>= 1; |
107 | ++order; | |
108 | } | |
109 | ||
110 | set_bit(seg, buddy->bits[order]); | |
e4044cfc | 111 | ++buddy->num_free[order]; |
225c7b1f RD |
112 | |
113 | spin_unlock(&buddy->lock); | |
114 | } | |
115 | ||
e8f9b2ed | 116 | static int mlx4_buddy_init(struct mlx4_buddy *buddy, int max_order) |
225c7b1f RD |
117 | { |
118 | int i, s; | |
119 | ||
120 | buddy->max_order = max_order; | |
121 | spin_lock_init(&buddy->lock); | |
122 | ||
123 | buddy->bits = kzalloc((buddy->max_order + 1) * sizeof (long *), | |
124 | GFP_KERNEL); | |
a8312755 | 125 | buddy->num_free = kcalloc((buddy->max_order + 1), sizeof *buddy->num_free, |
e4044cfc RD |
126 | GFP_KERNEL); |
127 | if (!buddy->bits || !buddy->num_free) | |
225c7b1f RD |
128 | goto err_out; |
129 | ||
130 | for (i = 0; i <= buddy->max_order; ++i) { | |
131 | s = BITS_TO_LONGS(1 << (buddy->max_order - i)); | |
132 | buddy->bits[i] = kmalloc(s * sizeof (long), GFP_KERNEL); | |
133 | if (!buddy->bits[i]) | |
134 | goto err_out_free; | |
135 | bitmap_zero(buddy->bits[i], 1 << (buddy->max_order - i)); | |
136 | } | |
137 | ||
138 | set_bit(0, buddy->bits[buddy->max_order]); | |
e4044cfc | 139 | buddy->num_free[buddy->max_order] = 1; |
225c7b1f RD |
140 | |
141 | return 0; | |
142 | ||
143 | err_out_free: | |
144 | for (i = 0; i <= buddy->max_order; ++i) | |
145 | kfree(buddy->bits[i]); | |
146 | ||
e4044cfc | 147 | err_out: |
225c7b1f | 148 | kfree(buddy->bits); |
e4044cfc | 149 | kfree(buddy->num_free); |
225c7b1f | 150 | |
225c7b1f RD |
151 | return -ENOMEM; |
152 | } | |
153 | ||
154 | static void mlx4_buddy_cleanup(struct mlx4_buddy *buddy) | |
155 | { | |
156 | int i; | |
157 | ||
158 | for (i = 0; i <= buddy->max_order; ++i) | |
159 | kfree(buddy->bits[i]); | |
160 | ||
161 | kfree(buddy->bits); | |
e4044cfc | 162 | kfree(buddy->num_free); |
225c7b1f RD |
163 | } |
164 | ||
c82e9aa0 | 165 | u32 __mlx4_alloc_mtt_range(struct mlx4_dev *dev, int order) |
225c7b1f RD |
166 | { |
167 | struct mlx4_mr_table *mr_table = &mlx4_priv(dev)->mr_table; | |
168 | u32 seg; | |
2b8fb286 MA |
169 | int seg_order; |
170 | u32 offset; | |
225c7b1f | 171 | |
2b8fb286 MA |
172 | seg_order = max_t(int, order - log_mtts_per_seg, 0); |
173 | ||
174 | seg = mlx4_buddy_alloc(&mr_table->mtt_buddy, seg_order); | |
225c7b1f RD |
175 | if (seg == -1) |
176 | return -1; | |
177 | ||
2b8fb286 MA |
178 | offset = seg * (1 << log_mtts_per_seg); |
179 | ||
180 | if (mlx4_table_get_range(dev, &mr_table->mtt_table, offset, | |
181 | offset + (1 << order) - 1)) { | |
182 | mlx4_buddy_free(&mr_table->mtt_buddy, seg, seg_order); | |
225c7b1f RD |
183 | return -1; |
184 | } | |
185 | ||
2b8fb286 | 186 | return offset; |
225c7b1f RD |
187 | } |
188 | ||
ea51b377 JM |
189 | static u32 mlx4_alloc_mtt_range(struct mlx4_dev *dev, int order) |
190 | { | |
191 | u64 in_param; | |
192 | u64 out_param; | |
193 | int err; | |
194 | ||
195 | if (mlx4_is_mfunc(dev)) { | |
196 | set_param_l(&in_param, order); | |
197 | err = mlx4_cmd_imm(dev, in_param, &out_param, RES_MTT, | |
198 | RES_OP_RESERVE_AND_MAP, | |
199 | MLX4_CMD_ALLOC_RES, | |
200 | MLX4_CMD_TIME_CLASS_A, | |
201 | MLX4_CMD_WRAPPED); | |
202 | if (err) | |
203 | return -1; | |
204 | return get_param_l(&out_param); | |
205 | } | |
206 | return __mlx4_alloc_mtt_range(dev, order); | |
207 | } | |
208 | ||
225c7b1f RD |
209 | int mlx4_mtt_init(struct mlx4_dev *dev, int npages, int page_shift, |
210 | struct mlx4_mtt *mtt) | |
211 | { | |
212 | int i; | |
213 | ||
214 | if (!npages) { | |
215 | mtt->order = -1; | |
216 | mtt->page_shift = MLX4_ICM_PAGE_SHIFT; | |
217 | return 0; | |
218 | } else | |
219 | mtt->page_shift = page_shift; | |
220 | ||
2b8fb286 | 221 | for (mtt->order = 0, i = 1; i < npages; i <<= 1) |
225c7b1f RD |
222 | ++mtt->order; |
223 | ||
2b8fb286 MA |
224 | mtt->offset = mlx4_alloc_mtt_range(dev, mtt->order); |
225 | if (mtt->offset == -1) | |
225c7b1f RD |
226 | return -ENOMEM; |
227 | ||
228 | return 0; | |
229 | } | |
230 | EXPORT_SYMBOL_GPL(mlx4_mtt_init); | |
231 | ||
2b8fb286 | 232 | void __mlx4_free_mtt_range(struct mlx4_dev *dev, u32 offset, int order) |
225c7b1f | 233 | { |
2b8fb286 MA |
234 | u32 first_seg; |
235 | int seg_order; | |
225c7b1f RD |
236 | struct mlx4_mr_table *mr_table = &mlx4_priv(dev)->mr_table; |
237 | ||
2b8fb286 MA |
238 | seg_order = max_t(int, order - log_mtts_per_seg, 0); |
239 | first_seg = offset / (1 << log_mtts_per_seg); | |
240 | ||
241 | mlx4_buddy_free(&mr_table->mtt_buddy, first_seg, seg_order); | |
1e27ca69 MA |
242 | mlx4_table_put_range(dev, &mr_table->mtt_table, offset, |
243 | offset + (1 << order) - 1); | |
ea51b377 JM |
244 | } |
245 | ||
2b8fb286 | 246 | static void mlx4_free_mtt_range(struct mlx4_dev *dev, u32 offset, int order) |
ea51b377 JM |
247 | { |
248 | u64 in_param; | |
249 | int err; | |
250 | ||
251 | if (mlx4_is_mfunc(dev)) { | |
2b8fb286 | 252 | set_param_l(&in_param, offset); |
ea51b377 JM |
253 | set_param_h(&in_param, order); |
254 | err = mlx4_cmd(dev, in_param, RES_MTT, RES_OP_RESERVE_AND_MAP, | |
255 | MLX4_CMD_FREE_RES, | |
256 | MLX4_CMD_TIME_CLASS_A, | |
257 | MLX4_CMD_WRAPPED); | |
258 | if (err) | |
2b8fb286 MA |
259 | mlx4_warn(dev, "Failed to free mtt range at:" |
260 | "%d order:%d\n", offset, order); | |
ea51b377 JM |
261 | return; |
262 | } | |
2b8fb286 | 263 | __mlx4_free_mtt_range(dev, offset, order); |
ea51b377 JM |
264 | } |
265 | ||
266 | void mlx4_mtt_cleanup(struct mlx4_dev *dev, struct mlx4_mtt *mtt) | |
267 | { | |
225c7b1f RD |
268 | if (mtt->order < 0) |
269 | return; | |
270 | ||
2b8fb286 | 271 | mlx4_free_mtt_range(dev, mtt->offset, mtt->order); |
225c7b1f RD |
272 | } |
273 | EXPORT_SYMBOL_GPL(mlx4_mtt_cleanup); | |
274 | ||
275 | u64 mlx4_mtt_addr(struct mlx4_dev *dev, struct mlx4_mtt *mtt) | |
276 | { | |
2b8fb286 | 277 | return (u64) mtt->offset * dev->caps.mtt_entry_sz; |
225c7b1f RD |
278 | } |
279 | EXPORT_SYMBOL_GPL(mlx4_mtt_addr); | |
280 | ||
281 | static u32 hw_index_to_key(u32 ind) | |
282 | { | |
283 | return (ind >> 24) | (ind << 8); | |
284 | } | |
285 | ||
286 | static u32 key_to_hw_index(u32 key) | |
287 | { | |
288 | return (key << 24) | (key >> 8); | |
289 | } | |
290 | ||
291 | static int mlx4_SW2HW_MPT(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox, | |
292 | int mpt_index) | |
293 | { | |
eb41049f | 294 | return mlx4_cmd(dev, mailbox->dma, mpt_index, |
ea51b377 JM |
295 | 0, MLX4_CMD_SW2HW_MPT, MLX4_CMD_TIME_CLASS_B, |
296 | MLX4_CMD_WRAPPED); | |
225c7b1f RD |
297 | } |
298 | ||
299 | static int mlx4_HW2SW_MPT(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox, | |
300 | int mpt_index) | |
301 | { | |
302 | return mlx4_cmd_box(dev, 0, mailbox ? mailbox->dma : 0, mpt_index, | |
f9baff50 JM |
303 | !mailbox, MLX4_CMD_HW2SW_MPT, |
304 | MLX4_CMD_TIME_CLASS_B, MLX4_CMD_WRAPPED); | |
225c7b1f RD |
305 | } |
306 | ||
22c8bff6 | 307 | int mlx4_mr_alloc_reserved(struct mlx4_dev *dev, u32 mridx, u32 pd, |
ea51b377 JM |
308 | u64 iova, u64 size, u32 access, int npages, |
309 | int page_shift, struct mlx4_mr *mr) | |
310 | { | |
225c7b1f RD |
311 | mr->iova = iova; |
312 | mr->size = size; | |
313 | mr->pd = pd; | |
314 | mr->access = access; | |
ea51b377 JM |
315 | mr->enabled = MLX4_MR_DISABLED; |
316 | mr->key = hw_index_to_key(mridx); | |
317 | ||
318 | return mlx4_mtt_init(dev, npages, page_shift, &mr->mtt); | |
319 | } | |
320 | EXPORT_SYMBOL_GPL(mlx4_mr_alloc_reserved); | |
321 | ||
322 | static int mlx4_WRITE_MTT(struct mlx4_dev *dev, | |
323 | struct mlx4_cmd_mailbox *mailbox, | |
324 | int num_entries) | |
325 | { | |
326 | return mlx4_cmd(dev, mailbox->dma, num_entries, 0, MLX4_CMD_WRITE_MTT, | |
327 | MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED); | |
328 | } | |
329 | ||
c82e9aa0 | 330 | int __mlx4_mr_reserve(struct mlx4_dev *dev) |
ea51b377 JM |
331 | { |
332 | struct mlx4_priv *priv = mlx4_priv(dev); | |
333 | ||
334 | return mlx4_bitmap_alloc(&priv->mr_table.mpt_bitmap); | |
335 | } | |
225c7b1f | 336 | |
ea51b377 JM |
337 | static int mlx4_mr_reserve(struct mlx4_dev *dev) |
338 | { | |
339 | u64 out_param; | |
340 | ||
341 | if (mlx4_is_mfunc(dev)) { | |
342 | if (mlx4_cmd_imm(dev, 0, &out_param, RES_MPT, RES_OP_RESERVE, | |
343 | MLX4_CMD_ALLOC_RES, | |
344 | MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED)) | |
345 | return -1; | |
346 | return get_param_l(&out_param); | |
347 | } | |
348 | return __mlx4_mr_reserve(dev); | |
349 | } | |
350 | ||
c82e9aa0 | 351 | void __mlx4_mr_release(struct mlx4_dev *dev, u32 index) |
ea51b377 JM |
352 | { |
353 | struct mlx4_priv *priv = mlx4_priv(dev); | |
354 | ||
355 | mlx4_bitmap_free(&priv->mr_table.mpt_bitmap, index); | |
356 | } | |
357 | ||
358 | static void mlx4_mr_release(struct mlx4_dev *dev, u32 index) | |
359 | { | |
360 | u64 in_param; | |
361 | ||
362 | if (mlx4_is_mfunc(dev)) { | |
363 | set_param_l(&in_param, index); | |
364 | if (mlx4_cmd(dev, in_param, RES_MPT, RES_OP_RESERVE, | |
365 | MLX4_CMD_FREE_RES, | |
366 | MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED)) | |
367 | mlx4_warn(dev, "Failed to release mr index:%d\n", | |
368 | index); | |
369 | return; | |
370 | } | |
371 | __mlx4_mr_release(dev, index); | |
372 | } | |
373 | ||
c82e9aa0 | 374 | int __mlx4_mr_alloc_icm(struct mlx4_dev *dev, u32 index) |
ea51b377 JM |
375 | { |
376 | struct mlx4_mr_table *mr_table = &mlx4_priv(dev)->mr_table; | |
377 | ||
378 | return mlx4_table_get(dev, &mr_table->dmpt_table, index); | |
379 | } | |
380 | ||
381 | static int mlx4_mr_alloc_icm(struct mlx4_dev *dev, u32 index) | |
382 | { | |
383 | u64 param; | |
384 | ||
385 | if (mlx4_is_mfunc(dev)) { | |
386 | set_param_l(¶m, index); | |
387 | return mlx4_cmd_imm(dev, param, ¶m, RES_MPT, RES_OP_MAP_ICM, | |
388 | MLX4_CMD_ALLOC_RES, | |
389 | MLX4_CMD_TIME_CLASS_A, | |
390 | MLX4_CMD_WRAPPED); | |
391 | } | |
392 | return __mlx4_mr_alloc_icm(dev, index); | |
393 | } | |
394 | ||
c82e9aa0 | 395 | void __mlx4_mr_free_icm(struct mlx4_dev *dev, u32 index) |
ea51b377 JM |
396 | { |
397 | struct mlx4_mr_table *mr_table = &mlx4_priv(dev)->mr_table; | |
398 | ||
399 | mlx4_table_put(dev, &mr_table->dmpt_table, index); | |
400 | } | |
401 | ||
402 | static void mlx4_mr_free_icm(struct mlx4_dev *dev, u32 index) | |
403 | { | |
404 | u64 in_param; | |
405 | ||
406 | if (mlx4_is_mfunc(dev)) { | |
407 | set_param_l(&in_param, index); | |
408 | if (mlx4_cmd(dev, in_param, RES_MPT, RES_OP_MAP_ICM, | |
409 | MLX4_CMD_FREE_RES, MLX4_CMD_TIME_CLASS_A, | |
410 | MLX4_CMD_WRAPPED)) | |
411 | mlx4_warn(dev, "Failed to free icm of mr index:%d\n", | |
412 | index); | |
413 | return; | |
414 | } | |
415 | return __mlx4_mr_free_icm(dev, index); | |
416 | } | |
417 | ||
418 | int mlx4_mr_alloc(struct mlx4_dev *dev, u32 pd, u64 iova, u64 size, u32 access, | |
419 | int npages, int page_shift, struct mlx4_mr *mr) | |
420 | { | |
421 | u32 index; | |
422 | int err; | |
423 | ||
424 | index = mlx4_mr_reserve(dev); | |
425 | if (index == -1) | |
426 | return -ENOMEM; | |
427 | ||
428 | err = mlx4_mr_alloc_reserved(dev, index, pd, iova, size, | |
429 | access, npages, page_shift, mr); | |
225c7b1f | 430 | if (err) |
ea51b377 | 431 | mlx4_mr_release(dev, index); |
225c7b1f | 432 | |
225c7b1f RD |
433 | return err; |
434 | } | |
435 | EXPORT_SYMBOL_GPL(mlx4_mr_alloc); | |
436 | ||
22c8bff6 | 437 | void mlx4_mr_free_reserved(struct mlx4_dev *dev, struct mlx4_mr *mr) |
225c7b1f | 438 | { |
225c7b1f RD |
439 | int err; |
440 | ||
ea51b377 | 441 | if (mr->enabled == MLX4_MR_EN_HW) { |
225c7b1f RD |
442 | err = mlx4_HW2SW_MPT(dev, NULL, |
443 | key_to_hw_index(mr->key) & | |
444 | (dev->caps.num_mpts - 1)); | |
445 | if (err) | |
ea51b377 | 446 | mlx4_warn(dev, "xxx HW2SW_MPT failed (%d)\n", err); |
225c7b1f | 447 | |
ea51b377 JM |
448 | mr->enabled = MLX4_MR_EN_SW; |
449 | } | |
225c7b1f | 450 | mlx4_mtt_cleanup(dev, &mr->mtt); |
ea51b377 JM |
451 | } |
452 | EXPORT_SYMBOL_GPL(mlx4_mr_free_reserved); | |
453 | ||
454 | void mlx4_mr_free(struct mlx4_dev *dev, struct mlx4_mr *mr) | |
455 | { | |
456 | mlx4_mr_free_reserved(dev, mr); | |
457 | if (mr->enabled) | |
458 | mlx4_mr_free_icm(dev, key_to_hw_index(mr->key)); | |
459 | mlx4_mr_release(dev, key_to_hw_index(mr->key)); | |
225c7b1f RD |
460 | } |
461 | EXPORT_SYMBOL_GPL(mlx4_mr_free); | |
462 | ||
463 | int mlx4_mr_enable(struct mlx4_dev *dev, struct mlx4_mr *mr) | |
464 | { | |
225c7b1f RD |
465 | struct mlx4_cmd_mailbox *mailbox; |
466 | struct mlx4_mpt_entry *mpt_entry; | |
467 | int err; | |
468 | ||
ea51b377 | 469 | err = mlx4_mr_alloc_icm(dev, key_to_hw_index(mr->key)); |
225c7b1f RD |
470 | if (err) |
471 | return err; | |
472 | ||
473 | mailbox = mlx4_alloc_cmd_mailbox(dev); | |
474 | if (IS_ERR(mailbox)) { | |
475 | err = PTR_ERR(mailbox); | |
476 | goto err_table; | |
477 | } | |
478 | mpt_entry = mailbox->buf; | |
479 | ||
480 | memset(mpt_entry, 0, sizeof *mpt_entry); | |
481 | ||
95d04f07 | 482 | mpt_entry->flags = cpu_to_be32(MLX4_MPT_FLAG_MIO | |
225c7b1f RD |
483 | MLX4_MPT_FLAG_REGION | |
484 | mr->access); | |
225c7b1f RD |
485 | |
486 | mpt_entry->key = cpu_to_be32(key_to_hw_index(mr->key)); | |
95d04f07 | 487 | mpt_entry->pd_flags = cpu_to_be32(mr->pd | MLX4_MPT_PD_FLAG_EN_INV); |
225c7b1f RD |
488 | mpt_entry->start = cpu_to_be64(mr->iova); |
489 | mpt_entry->length = cpu_to_be64(mr->size); | |
490 | mpt_entry->entity_size = cpu_to_be32(mr->mtt.page_shift); | |
95d04f07 | 491 | |
b2d9308a JM |
492 | if (mr->mtt.order < 0) { |
493 | mpt_entry->flags |= cpu_to_be32(MLX4_MPT_FLAG_PHYSICAL); | |
2b8fb286 | 494 | mpt_entry->mtt_addr = 0; |
95d04f07 | 495 | } else { |
2b8fb286 MA |
496 | mpt_entry->mtt_addr = cpu_to_be64(mlx4_mtt_addr(dev, |
497 | &mr->mtt)); | |
95d04f07 RD |
498 | } |
499 | ||
500 | if (mr->mtt.order >= 0 && mr->mtt.page_shift == 0) { | |
501 | /* fast register MR in free state */ | |
502 | mpt_entry->flags |= cpu_to_be32(MLX4_MPT_FLAG_FREE); | |
c9257433 VS |
503 | mpt_entry->pd_flags |= cpu_to_be32(MLX4_MPT_PD_FLAG_FAST_REG | |
504 | MLX4_MPT_PD_FLAG_RAE); | |
2b8fb286 | 505 | mpt_entry->mtt_sz = cpu_to_be32(1 << mr->mtt.order); |
95d04f07 RD |
506 | } else { |
507 | mpt_entry->flags |= cpu_to_be32(MLX4_MPT_FLAG_SW_OWNS); | |
508 | } | |
225c7b1f RD |
509 | |
510 | err = mlx4_SW2HW_MPT(dev, mailbox, | |
511 | key_to_hw_index(mr->key) & (dev->caps.num_mpts - 1)); | |
512 | if (err) { | |
513 | mlx4_warn(dev, "SW2HW_MPT failed (%d)\n", err); | |
514 | goto err_cmd; | |
515 | } | |
ea51b377 | 516 | mr->enabled = MLX4_MR_EN_HW; |
225c7b1f RD |
517 | |
518 | mlx4_free_cmd_mailbox(dev, mailbox); | |
519 | ||
520 | return 0; | |
521 | ||
522 | err_cmd: | |
523 | mlx4_free_cmd_mailbox(dev, mailbox); | |
524 | ||
525 | err_table: | |
ea51b377 | 526 | mlx4_mr_free_icm(dev, key_to_hw_index(mr->key)); |
225c7b1f RD |
527 | return err; |
528 | } | |
529 | EXPORT_SYMBOL_GPL(mlx4_mr_enable); | |
530 | ||
d7bb58fb JM |
531 | static int mlx4_write_mtt_chunk(struct mlx4_dev *dev, struct mlx4_mtt *mtt, |
532 | int start_index, int npages, u64 *page_list) | |
225c7b1f | 533 | { |
d7bb58fb JM |
534 | struct mlx4_priv *priv = mlx4_priv(dev); |
535 | __be64 *mtts; | |
536 | dma_addr_t dma_handle; | |
537 | int i; | |
d7bb58fb | 538 | |
2b8fb286 MA |
539 | mtts = mlx4_table_find(&priv->mr_table.mtt_table, mtt->offset + |
540 | start_index, &dma_handle); | |
d7bb58fb | 541 | |
d7bb58fb JM |
542 | if (!mtts) |
543 | return -ENOMEM; | |
544 | ||
e727f5cd RD |
545 | dma_sync_single_for_cpu(&dev->pdev->dev, dma_handle, |
546 | npages * sizeof (u64), DMA_TO_DEVICE); | |
547 | ||
d7bb58fb JM |
548 | for (i = 0; i < npages; ++i) |
549 | mtts[i] = cpu_to_be64(page_list[i] | MLX4_MTT_FLAG_PRESENT); | |
550 | ||
e727f5cd RD |
551 | dma_sync_single_for_device(&dev->pdev->dev, dma_handle, |
552 | npages * sizeof (u64), DMA_TO_DEVICE); | |
d7bb58fb JM |
553 | |
554 | return 0; | |
225c7b1f RD |
555 | } |
556 | ||
c82e9aa0 | 557 | int __mlx4_write_mtt(struct mlx4_dev *dev, struct mlx4_mtt *mtt, |
ea51b377 | 558 | int start_index, int npages, u64 *page_list) |
225c7b1f | 559 | { |
ea51b377 | 560 | int err = 0; |
d7bb58fb | 561 | int chunk; |
2b8fb286 MA |
562 | int mtts_per_page; |
563 | int max_mtts_first_page; | |
564 | ||
565 | /* compute how may mtts fit in the first page */ | |
566 | mtts_per_page = PAGE_SIZE / sizeof(u64); | |
567 | max_mtts_first_page = mtts_per_page - (mtt->offset + start_index) | |
568 | % mtts_per_page; | |
569 | ||
570 | chunk = min_t(int, max_mtts_first_page, npages); | |
225c7b1f | 571 | |
225c7b1f | 572 | while (npages > 0) { |
d7bb58fb | 573 | err = mlx4_write_mtt_chunk(dev, mtt, start_index, chunk, page_list); |
225c7b1f | 574 | if (err) |
d7bb58fb | 575 | return err; |
d7bb58fb JM |
576 | npages -= chunk; |
577 | start_index += chunk; | |
578 | page_list += chunk; | |
2b8fb286 MA |
579 | |
580 | chunk = min_t(int, mtts_per_page, npages); | |
225c7b1f | 581 | } |
ea51b377 JM |
582 | return err; |
583 | } | |
225c7b1f | 584 | |
ea51b377 JM |
585 | int mlx4_write_mtt(struct mlx4_dev *dev, struct mlx4_mtt *mtt, |
586 | int start_index, int npages, u64 *page_list) | |
587 | { | |
588 | struct mlx4_cmd_mailbox *mailbox = NULL; | |
589 | __be64 *inbox = NULL; | |
590 | int chunk; | |
591 | int err = 0; | |
592 | int i; | |
593 | ||
594 | if (mtt->order < 0) | |
595 | return -EINVAL; | |
596 | ||
597 | if (mlx4_is_mfunc(dev)) { | |
598 | mailbox = mlx4_alloc_cmd_mailbox(dev); | |
599 | if (IS_ERR(mailbox)) | |
600 | return PTR_ERR(mailbox); | |
601 | inbox = mailbox->buf; | |
602 | ||
603 | while (npages > 0) { | |
2b8fb286 MA |
604 | chunk = min_t(int, MLX4_MAILBOX_SIZE / sizeof(u64) - 2, |
605 | npages); | |
606 | inbox[0] = cpu_to_be64(mtt->offset + start_index); | |
ea51b377 JM |
607 | inbox[1] = 0; |
608 | for (i = 0; i < chunk; ++i) | |
609 | inbox[i + 2] = cpu_to_be64(page_list[i] | | |
610 | MLX4_MTT_FLAG_PRESENT); | |
611 | err = mlx4_WRITE_MTT(dev, mailbox, chunk); | |
612 | if (err) { | |
613 | mlx4_free_cmd_mailbox(dev, mailbox); | |
614 | return err; | |
615 | } | |
616 | ||
617 | npages -= chunk; | |
618 | start_index += chunk; | |
619 | page_list += chunk; | |
620 | } | |
621 | mlx4_free_cmd_mailbox(dev, mailbox); | |
622 | return err; | |
623 | } | |
624 | ||
625 | return __mlx4_write_mtt(dev, mtt, start_index, npages, page_list); | |
225c7b1f RD |
626 | } |
627 | EXPORT_SYMBOL_GPL(mlx4_write_mtt); | |
628 | ||
629 | int mlx4_buf_write_mtt(struct mlx4_dev *dev, struct mlx4_mtt *mtt, | |
630 | struct mlx4_buf *buf) | |
631 | { | |
632 | u64 *page_list; | |
633 | int err; | |
634 | int i; | |
635 | ||
636 | page_list = kmalloc(buf->npages * sizeof *page_list, GFP_KERNEL); | |
637 | if (!page_list) | |
638 | return -ENOMEM; | |
639 | ||
640 | for (i = 0; i < buf->npages; ++i) | |
641 | if (buf->nbufs == 1) | |
b57aacfa | 642 | page_list[i] = buf->direct.map + (i << buf->page_shift); |
225c7b1f | 643 | else |
b57aacfa | 644 | page_list[i] = buf->page_list[i].map; |
225c7b1f RD |
645 | |
646 | err = mlx4_write_mtt(dev, mtt, 0, buf->npages, page_list); | |
647 | ||
648 | kfree(page_list); | |
649 | return err; | |
650 | } | |
651 | EXPORT_SYMBOL_GPL(mlx4_buf_write_mtt); | |
652 | ||
3d73c288 | 653 | int mlx4_init_mr_table(struct mlx4_dev *dev) |
225c7b1f | 654 | { |
ea51b377 JM |
655 | struct mlx4_priv *priv = mlx4_priv(dev); |
656 | struct mlx4_mr_table *mr_table = &priv->mr_table; | |
225c7b1f RD |
657 | int err; |
658 | ||
ea51b377 JM |
659 | if (!is_power_of_2(dev->caps.num_mpts)) |
660 | return -EINVAL; | |
661 | ||
662 | /* Nothing to do for slaves - all MR handling is forwarded | |
663 | * to the master */ | |
664 | if (mlx4_is_slave(dev)) | |
665 | return 0; | |
666 | ||
225c7b1f | 667 | err = mlx4_bitmap_init(&mr_table->mpt_bitmap, dev->caps.num_mpts, |
93fc9e1b | 668 | ~0, dev->caps.reserved_mrws, 0); |
225c7b1f RD |
669 | if (err) |
670 | return err; | |
671 | ||
672 | err = mlx4_buddy_init(&mr_table->mtt_buddy, | |
2b8fb286 MA |
673 | ilog2(dev->caps.num_mtts / |
674 | (1 << log_mtts_per_seg))); | |
225c7b1f RD |
675 | if (err) |
676 | goto err_buddy; | |
677 | ||
678 | if (dev->caps.reserved_mtts) { | |
ea51b377 JM |
679 | priv->reserved_mtts = |
680 | mlx4_alloc_mtt_range(dev, | |
681 | fls(dev->caps.reserved_mtts - 1)); | |
682 | if (priv->reserved_mtts < 0) { | |
225c7b1f RD |
683 | mlx4_warn(dev, "MTT table of order %d is too small.\n", |
684 | mr_table->mtt_buddy.max_order); | |
685 | err = -ENOMEM; | |
686 | goto err_reserve_mtts; | |
687 | } | |
688 | } | |
689 | ||
690 | return 0; | |
691 | ||
692 | err_reserve_mtts: | |
693 | mlx4_buddy_cleanup(&mr_table->mtt_buddy); | |
694 | ||
695 | err_buddy: | |
696 | mlx4_bitmap_cleanup(&mr_table->mpt_bitmap); | |
697 | ||
698 | return err; | |
699 | } | |
700 | ||
701 | void mlx4_cleanup_mr_table(struct mlx4_dev *dev) | |
702 | { | |
ea51b377 JM |
703 | struct mlx4_priv *priv = mlx4_priv(dev); |
704 | struct mlx4_mr_table *mr_table = &priv->mr_table; | |
225c7b1f | 705 | |
ea51b377 JM |
706 | if (mlx4_is_slave(dev)) |
707 | return; | |
708 | if (priv->reserved_mtts >= 0) | |
709 | mlx4_free_mtt_range(dev, priv->reserved_mtts, | |
710 | fls(dev->caps.reserved_mtts - 1)); | |
225c7b1f RD |
711 | mlx4_buddy_cleanup(&mr_table->mtt_buddy); |
712 | mlx4_bitmap_cleanup(&mr_table->mpt_bitmap); | |
713 | } | |
8ad11fb6 JM |
714 | |
715 | static inline int mlx4_check_fmr(struct mlx4_fmr *fmr, u64 *page_list, | |
716 | int npages, u64 iova) | |
717 | { | |
718 | int i, page_mask; | |
719 | ||
720 | if (npages > fmr->max_pages) | |
721 | return -EINVAL; | |
722 | ||
723 | page_mask = (1 << fmr->page_shift) - 1; | |
724 | ||
725 | /* We are getting page lists, so va must be page aligned. */ | |
726 | if (iova & page_mask) | |
727 | return -EINVAL; | |
728 | ||
729 | /* Trust the user not to pass misaligned data in page_list */ | |
730 | if (0) | |
731 | for (i = 0; i < npages; ++i) { | |
732 | if (page_list[i] & ~page_mask) | |
733 | return -EINVAL; | |
734 | } | |
735 | ||
736 | if (fmr->maps >= fmr->max_maps) | |
737 | return -EINVAL; | |
738 | ||
739 | return 0; | |
740 | } | |
741 | ||
742 | int mlx4_map_phys_fmr(struct mlx4_dev *dev, struct mlx4_fmr *fmr, u64 *page_list, | |
743 | int npages, u64 iova, u32 *lkey, u32 *rkey) | |
744 | { | |
745 | u32 key; | |
746 | int i, err; | |
747 | ||
748 | err = mlx4_check_fmr(fmr, page_list, npages, iova); | |
749 | if (err) | |
750 | return err; | |
751 | ||
752 | ++fmr->maps; | |
753 | ||
754 | key = key_to_hw_index(fmr->mr.key); | |
755 | key += dev->caps.num_mpts; | |
756 | *lkey = *rkey = fmr->mr.key = hw_index_to_key(key); | |
757 | ||
758 | *(u8 *) fmr->mpt = MLX4_MPT_STATUS_SW; | |
759 | ||
760 | /* Make sure MPT status is visible before writing MTT entries */ | |
761 | wmb(); | |
762 | ||
e727f5cd RD |
763 | dma_sync_single_for_cpu(&dev->pdev->dev, fmr->dma_handle, |
764 | npages * sizeof(u64), DMA_TO_DEVICE); | |
765 | ||
8ad11fb6 JM |
766 | for (i = 0; i < npages; ++i) |
767 | fmr->mtts[i] = cpu_to_be64(page_list[i] | MLX4_MTT_FLAG_PRESENT); | |
768 | ||
e727f5cd RD |
769 | dma_sync_single_for_device(&dev->pdev->dev, fmr->dma_handle, |
770 | npages * sizeof(u64), DMA_TO_DEVICE); | |
8ad11fb6 JM |
771 | |
772 | fmr->mpt->key = cpu_to_be32(key); | |
773 | fmr->mpt->lkey = cpu_to_be32(key); | |
774 | fmr->mpt->length = cpu_to_be64(npages * (1ull << fmr->page_shift)); | |
775 | fmr->mpt->start = cpu_to_be64(iova); | |
776 | ||
777 | /* Make MTT entries are visible before setting MPT status */ | |
778 | wmb(); | |
779 | ||
780 | *(u8 *) fmr->mpt = MLX4_MPT_STATUS_HW; | |
781 | ||
782 | /* Make sure MPT status is visible before consumer can use FMR */ | |
783 | wmb(); | |
784 | ||
785 | return 0; | |
786 | } | |
787 | EXPORT_SYMBOL_GPL(mlx4_map_phys_fmr); | |
788 | ||
789 | int mlx4_fmr_alloc(struct mlx4_dev *dev, u32 pd, u32 access, int max_pages, | |
790 | int max_maps, u8 page_shift, struct mlx4_fmr *fmr) | |
791 | { | |
792 | struct mlx4_priv *priv = mlx4_priv(dev); | |
2b8fb286 | 793 | u64 mtt_offset; |
8ad11fb6 JM |
794 | int err = -ENOMEM; |
795 | ||
c5057ddc | 796 | if (page_shift < (ffs(dev->caps.page_size_cap) - 1) || page_shift >= 32) |
8ad11fb6 JM |
797 | return -EINVAL; |
798 | ||
799 | /* All MTTs must fit in the same page */ | |
800 | if (max_pages * sizeof *fmr->mtts > PAGE_SIZE) | |
801 | return -EINVAL; | |
802 | ||
803 | fmr->page_shift = page_shift; | |
804 | fmr->max_pages = max_pages; | |
805 | fmr->max_maps = max_maps; | |
806 | fmr->maps = 0; | |
807 | ||
808 | err = mlx4_mr_alloc(dev, pd, 0, 0, access, max_pages, | |
809 | page_shift, &fmr->mr); | |
810 | if (err) | |
811 | return err; | |
812 | ||
2b8fb286 | 813 | mtt_offset = fmr->mr.mtt.offset * dev->caps.mtt_entry_sz; |
8ad11fb6 JM |
814 | |
815 | fmr->mtts = mlx4_table_find(&priv->mr_table.mtt_table, | |
2b8fb286 | 816 | fmr->mr.mtt.offset, |
8ad11fb6 | 817 | &fmr->dma_handle); |
2b8fb286 | 818 | |
8ad11fb6 JM |
819 | if (!fmr->mtts) { |
820 | err = -ENOMEM; | |
821 | goto err_free; | |
822 | } | |
823 | ||
8ad11fb6 JM |
824 | return 0; |
825 | ||
826 | err_free: | |
827 | mlx4_mr_free(dev, &fmr->mr); | |
828 | return err; | |
829 | } | |
830 | EXPORT_SYMBOL_GPL(mlx4_fmr_alloc); | |
831 | ||
832 | int mlx4_fmr_enable(struct mlx4_dev *dev, struct mlx4_fmr *fmr) | |
833 | { | |
11e75a74 JM |
834 | struct mlx4_priv *priv = mlx4_priv(dev); |
835 | int err; | |
836 | ||
837 | err = mlx4_mr_enable(dev, &fmr->mr); | |
838 | if (err) | |
839 | return err; | |
840 | ||
841 | fmr->mpt = mlx4_table_find(&priv->mr_table.dmpt_table, | |
842 | key_to_hw_index(fmr->mr.key), NULL); | |
843 | if (!fmr->mpt) | |
844 | return -ENOMEM; | |
845 | ||
846 | return 0; | |
8ad11fb6 JM |
847 | } |
848 | EXPORT_SYMBOL_GPL(mlx4_fmr_enable); | |
849 | ||
850 | void mlx4_fmr_unmap(struct mlx4_dev *dev, struct mlx4_fmr *fmr, | |
851 | u32 *lkey, u32 *rkey) | |
852 | { | |
ea51b377 JM |
853 | struct mlx4_cmd_mailbox *mailbox; |
854 | int err; | |
855 | ||
8ad11fb6 JM |
856 | if (!fmr->maps) |
857 | return; | |
858 | ||
8ad11fb6 JM |
859 | fmr->maps = 0; |
860 | ||
ea51b377 JM |
861 | mailbox = mlx4_alloc_cmd_mailbox(dev); |
862 | if (IS_ERR(mailbox)) { | |
863 | err = PTR_ERR(mailbox); | |
864 | printk(KERN_WARNING "mlx4_ib: mlx4_alloc_cmd_mailbox" | |
865 | " failed (%d)\n", err); | |
866 | return; | |
867 | } | |
868 | ||
869 | err = mlx4_HW2SW_MPT(dev, NULL, | |
870 | key_to_hw_index(fmr->mr.key) & | |
871 | (dev->caps.num_mpts - 1)); | |
872 | mlx4_free_cmd_mailbox(dev, mailbox); | |
873 | if (err) { | |
874 | printk(KERN_WARNING "mlx4_ib: mlx4_HW2SW_MPT failed (%d)\n", | |
875 | err); | |
876 | return; | |
877 | } | |
878 | fmr->mr.enabled = MLX4_MR_EN_SW; | |
8ad11fb6 JM |
879 | } |
880 | EXPORT_SYMBOL_GPL(mlx4_fmr_unmap); | |
881 | ||
882 | int mlx4_fmr_free(struct mlx4_dev *dev, struct mlx4_fmr *fmr) | |
883 | { | |
884 | if (fmr->maps) | |
885 | return -EBUSY; | |
886 | ||
8ad11fb6 | 887 | mlx4_mr_free(dev, &fmr->mr); |
ea51b377 | 888 | fmr->mr.enabled = MLX4_MR_DISABLED; |
8ad11fb6 JM |
889 | |
890 | return 0; | |
891 | } | |
892 | EXPORT_SYMBOL_GPL(mlx4_fmr_free); | |
893 | ||
894 | int mlx4_SYNC_TPT(struct mlx4_dev *dev) | |
895 | { | |
f9baff50 JM |
896 | return mlx4_cmd(dev, 0, 0, 0, MLX4_CMD_SYNC_TPT, 1000, |
897 | MLX4_CMD_WRAPPED); | |
8ad11fb6 JM |
898 | } |
899 | EXPORT_SYMBOL_GPL(mlx4_SYNC_TPT); |