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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> |
89dd86db | 40 | #include <linux/vmalloc.h> |
225c7b1f RD |
41 | |
42 | #include <linux/mlx4/cmd.h> | |
43 | ||
44 | #include "mlx4.h" | |
45 | #include "icm.h" | |
46 | ||
225c7b1f | 47 | #define MLX4_MPT_FLAG_SW_OWNS (0xfUL << 28) |
95d04f07 | 48 | #define MLX4_MPT_FLAG_FREE (0x3UL << 28) |
225c7b1f RD |
49 | #define MLX4_MPT_FLAG_MIO (1 << 17) |
50 | #define MLX4_MPT_FLAG_BIND_ENABLE (1 << 15) | |
51 | #define MLX4_MPT_FLAG_PHYSICAL (1 << 9) | |
52 | #define MLX4_MPT_FLAG_REGION (1 << 8) | |
53 | ||
c9257433 VS |
54 | #define MLX4_MPT_PD_FLAG_FAST_REG (1 << 27) |
55 | #define MLX4_MPT_PD_FLAG_RAE (1 << 28) | |
95d04f07 RD |
56 | #define MLX4_MPT_PD_FLAG_EN_INV (3 << 24) |
57 | ||
8ad11fb6 JM |
58 | #define MLX4_MPT_STATUS_SW 0xF0 |
59 | #define MLX4_MPT_STATUS_HW 0x00 | |
60 | ||
225c7b1f RD |
61 | static u32 mlx4_buddy_alloc(struct mlx4_buddy *buddy, int order) |
62 | { | |
63 | int o; | |
64 | int m; | |
65 | u32 seg; | |
66 | ||
67 | spin_lock(&buddy->lock); | |
68 | ||
e4044cfc RD |
69 | for (o = order; o <= buddy->max_order; ++o) |
70 | if (buddy->num_free[o]) { | |
71 | m = 1 << (buddy->max_order - o); | |
72 | seg = find_first_bit(buddy->bits[o], m); | |
73 | if (seg < m) | |
74 | goto found; | |
75 | } | |
225c7b1f RD |
76 | |
77 | spin_unlock(&buddy->lock); | |
78 | return -1; | |
79 | ||
80 | found: | |
81 | clear_bit(seg, buddy->bits[o]); | |
e4044cfc | 82 | --buddy->num_free[o]; |
225c7b1f RD |
83 | |
84 | while (o > order) { | |
85 | --o; | |
86 | seg <<= 1; | |
87 | set_bit(seg ^ 1, buddy->bits[o]); | |
e4044cfc | 88 | ++buddy->num_free[o]; |
225c7b1f RD |
89 | } |
90 | ||
91 | spin_unlock(&buddy->lock); | |
92 | ||
93 | seg <<= order; | |
94 | ||
95 | return seg; | |
96 | } | |
97 | ||
98 | static void mlx4_buddy_free(struct mlx4_buddy *buddy, u32 seg, int order) | |
99 | { | |
100 | seg >>= order; | |
101 | ||
102 | spin_lock(&buddy->lock); | |
103 | ||
104 | while (test_bit(seg ^ 1, buddy->bits[order])) { | |
105 | clear_bit(seg ^ 1, buddy->bits[order]); | |
e4044cfc | 106 | --buddy->num_free[order]; |
225c7b1f RD |
107 | seg >>= 1; |
108 | ++order; | |
109 | } | |
110 | ||
111 | set_bit(seg, buddy->bits[order]); | |
e4044cfc | 112 | ++buddy->num_free[order]; |
225c7b1f RD |
113 | |
114 | spin_unlock(&buddy->lock); | |
115 | } | |
116 | ||
e8f9b2ed | 117 | static int mlx4_buddy_init(struct mlx4_buddy *buddy, int max_order) |
225c7b1f RD |
118 | { |
119 | int i, s; | |
120 | ||
121 | buddy->max_order = max_order; | |
122 | spin_lock_init(&buddy->lock); | |
123 | ||
96f17d59 | 124 | buddy->bits = kcalloc(buddy->max_order + 1, sizeof (long *), |
225c7b1f | 125 | GFP_KERNEL); |
a8312755 | 126 | buddy->num_free = kcalloc((buddy->max_order + 1), sizeof *buddy->num_free, |
e4044cfc RD |
127 | GFP_KERNEL); |
128 | if (!buddy->bits || !buddy->num_free) | |
225c7b1f RD |
129 | goto err_out; |
130 | ||
131 | for (i = 0; i <= buddy->max_order; ++i) { | |
132 | s = BITS_TO_LONGS(1 << (buddy->max_order - i)); | |
96f17d59 | 133 | buddy->bits[i] = kcalloc(s, sizeof (long), GFP_KERNEL | __GFP_NOWARN); |
89dd86db | 134 | if (!buddy->bits[i]) { |
96f17d59 | 135 | buddy->bits[i] = vzalloc(s * sizeof(long)); |
89dd86db YH |
136 | if (!buddy->bits[i]) |
137 | goto err_out_free; | |
138 | } | |
225c7b1f RD |
139 | } |
140 | ||
141 | set_bit(0, buddy->bits[buddy->max_order]); | |
e4044cfc | 142 | buddy->num_free[buddy->max_order] = 1; |
225c7b1f RD |
143 | |
144 | return 0; | |
145 | ||
146 | err_out_free: | |
147 | for (i = 0; i <= buddy->max_order; ++i) | |
89dd86db YH |
148 | if (buddy->bits[i] && is_vmalloc_addr(buddy->bits[i])) |
149 | vfree(buddy->bits[i]); | |
150 | else | |
151 | kfree(buddy->bits[i]); | |
225c7b1f | 152 | |
e4044cfc | 153 | err_out: |
225c7b1f | 154 | kfree(buddy->bits); |
e4044cfc | 155 | kfree(buddy->num_free); |
225c7b1f | 156 | |
225c7b1f RD |
157 | return -ENOMEM; |
158 | } | |
159 | ||
160 | static void mlx4_buddy_cleanup(struct mlx4_buddy *buddy) | |
161 | { | |
162 | int i; | |
163 | ||
164 | for (i = 0; i <= buddy->max_order; ++i) | |
89dd86db YH |
165 | if (is_vmalloc_addr(buddy->bits[i])) |
166 | vfree(buddy->bits[i]); | |
167 | else | |
168 | kfree(buddy->bits[i]); | |
225c7b1f RD |
169 | |
170 | kfree(buddy->bits); | |
e4044cfc | 171 | kfree(buddy->num_free); |
225c7b1f RD |
172 | } |
173 | ||
c82e9aa0 | 174 | u32 __mlx4_alloc_mtt_range(struct mlx4_dev *dev, int order) |
225c7b1f RD |
175 | { |
176 | struct mlx4_mr_table *mr_table = &mlx4_priv(dev)->mr_table; | |
177 | u32 seg; | |
2b8fb286 MA |
178 | int seg_order; |
179 | u32 offset; | |
225c7b1f | 180 | |
2b8fb286 MA |
181 | seg_order = max_t(int, order - log_mtts_per_seg, 0); |
182 | ||
183 | seg = mlx4_buddy_alloc(&mr_table->mtt_buddy, seg_order); | |
225c7b1f RD |
184 | if (seg == -1) |
185 | return -1; | |
186 | ||
2b8fb286 MA |
187 | offset = seg * (1 << log_mtts_per_seg); |
188 | ||
189 | if (mlx4_table_get_range(dev, &mr_table->mtt_table, offset, | |
190 | offset + (1 << order) - 1)) { | |
191 | mlx4_buddy_free(&mr_table->mtt_buddy, seg, seg_order); | |
225c7b1f RD |
192 | return -1; |
193 | } | |
194 | ||
2b8fb286 | 195 | return offset; |
225c7b1f RD |
196 | } |
197 | ||
ea51b377 JM |
198 | static u32 mlx4_alloc_mtt_range(struct mlx4_dev *dev, int order) |
199 | { | |
200 | u64 in_param; | |
201 | u64 out_param; | |
202 | int err; | |
203 | ||
204 | if (mlx4_is_mfunc(dev)) { | |
205 | set_param_l(&in_param, order); | |
206 | err = mlx4_cmd_imm(dev, in_param, &out_param, RES_MTT, | |
207 | RES_OP_RESERVE_AND_MAP, | |
208 | MLX4_CMD_ALLOC_RES, | |
209 | MLX4_CMD_TIME_CLASS_A, | |
210 | MLX4_CMD_WRAPPED); | |
211 | if (err) | |
212 | return -1; | |
213 | return get_param_l(&out_param); | |
214 | } | |
215 | return __mlx4_alloc_mtt_range(dev, order); | |
216 | } | |
217 | ||
225c7b1f RD |
218 | int mlx4_mtt_init(struct mlx4_dev *dev, int npages, int page_shift, |
219 | struct mlx4_mtt *mtt) | |
220 | { | |
221 | int i; | |
222 | ||
223 | if (!npages) { | |
224 | mtt->order = -1; | |
225 | mtt->page_shift = MLX4_ICM_PAGE_SHIFT; | |
226 | return 0; | |
227 | } else | |
228 | mtt->page_shift = page_shift; | |
229 | ||
2b8fb286 | 230 | for (mtt->order = 0, i = 1; i < npages; i <<= 1) |
225c7b1f RD |
231 | ++mtt->order; |
232 | ||
2b8fb286 MA |
233 | mtt->offset = mlx4_alloc_mtt_range(dev, mtt->order); |
234 | if (mtt->offset == -1) | |
225c7b1f RD |
235 | return -ENOMEM; |
236 | ||
237 | return 0; | |
238 | } | |
239 | EXPORT_SYMBOL_GPL(mlx4_mtt_init); | |
240 | ||
2b8fb286 | 241 | void __mlx4_free_mtt_range(struct mlx4_dev *dev, u32 offset, int order) |
225c7b1f | 242 | { |
2b8fb286 MA |
243 | u32 first_seg; |
244 | int seg_order; | |
225c7b1f RD |
245 | struct mlx4_mr_table *mr_table = &mlx4_priv(dev)->mr_table; |
246 | ||
2b8fb286 MA |
247 | seg_order = max_t(int, order - log_mtts_per_seg, 0); |
248 | first_seg = offset / (1 << log_mtts_per_seg); | |
249 | ||
250 | mlx4_buddy_free(&mr_table->mtt_buddy, first_seg, seg_order); | |
1e27ca69 MA |
251 | mlx4_table_put_range(dev, &mr_table->mtt_table, offset, |
252 | offset + (1 << order) - 1); | |
ea51b377 JM |
253 | } |
254 | ||
2b8fb286 | 255 | static void mlx4_free_mtt_range(struct mlx4_dev *dev, u32 offset, int order) |
ea51b377 JM |
256 | { |
257 | u64 in_param; | |
258 | int err; | |
259 | ||
260 | if (mlx4_is_mfunc(dev)) { | |
2b8fb286 | 261 | set_param_l(&in_param, offset); |
ea51b377 JM |
262 | set_param_h(&in_param, order); |
263 | err = mlx4_cmd(dev, in_param, RES_MTT, RES_OP_RESERVE_AND_MAP, | |
264 | MLX4_CMD_FREE_RES, | |
265 | MLX4_CMD_TIME_CLASS_A, | |
266 | MLX4_CMD_WRAPPED); | |
267 | if (err) | |
2b8fb286 MA |
268 | mlx4_warn(dev, "Failed to free mtt range at:" |
269 | "%d order:%d\n", offset, order); | |
ea51b377 JM |
270 | return; |
271 | } | |
2b8fb286 | 272 | __mlx4_free_mtt_range(dev, offset, order); |
ea51b377 JM |
273 | } |
274 | ||
275 | void mlx4_mtt_cleanup(struct mlx4_dev *dev, struct mlx4_mtt *mtt) | |
276 | { | |
225c7b1f RD |
277 | if (mtt->order < 0) |
278 | return; | |
279 | ||
2b8fb286 | 280 | mlx4_free_mtt_range(dev, mtt->offset, mtt->order); |
225c7b1f RD |
281 | } |
282 | EXPORT_SYMBOL_GPL(mlx4_mtt_cleanup); | |
283 | ||
284 | u64 mlx4_mtt_addr(struct mlx4_dev *dev, struct mlx4_mtt *mtt) | |
285 | { | |
2b8fb286 | 286 | return (u64) mtt->offset * dev->caps.mtt_entry_sz; |
225c7b1f RD |
287 | } |
288 | EXPORT_SYMBOL_GPL(mlx4_mtt_addr); | |
289 | ||
290 | static u32 hw_index_to_key(u32 ind) | |
291 | { | |
292 | return (ind >> 24) | (ind << 8); | |
293 | } | |
294 | ||
295 | static u32 key_to_hw_index(u32 key) | |
296 | { | |
297 | return (key << 24) | (key >> 8); | |
298 | } | |
299 | ||
300 | static int mlx4_SW2HW_MPT(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox, | |
301 | int mpt_index) | |
302 | { | |
eb41049f | 303 | return mlx4_cmd(dev, mailbox->dma, mpt_index, |
ea51b377 JM |
304 | 0, MLX4_CMD_SW2HW_MPT, MLX4_CMD_TIME_CLASS_B, |
305 | MLX4_CMD_WRAPPED); | |
225c7b1f RD |
306 | } |
307 | ||
308 | static int mlx4_HW2SW_MPT(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox, | |
309 | int mpt_index) | |
310 | { | |
311 | return mlx4_cmd_box(dev, 0, mailbox ? mailbox->dma : 0, mpt_index, | |
f9baff50 JM |
312 | !mailbox, MLX4_CMD_HW2SW_MPT, |
313 | MLX4_CMD_TIME_CLASS_B, MLX4_CMD_WRAPPED); | |
225c7b1f RD |
314 | } |
315 | ||
66431a7d | 316 | static int mlx4_mr_alloc_reserved(struct mlx4_dev *dev, u32 mridx, u32 pd, |
ea51b377 JM |
317 | u64 iova, u64 size, u32 access, int npages, |
318 | int page_shift, struct mlx4_mr *mr) | |
319 | { | |
225c7b1f RD |
320 | mr->iova = iova; |
321 | mr->size = size; | |
322 | mr->pd = pd; | |
323 | mr->access = access; | |
b20e519a | 324 | mr->enabled = MLX4_MPT_DISABLED; |
ea51b377 JM |
325 | mr->key = hw_index_to_key(mridx); |
326 | ||
327 | return mlx4_mtt_init(dev, npages, page_shift, &mr->mtt); | |
328 | } | |
ea51b377 JM |
329 | |
330 | static int mlx4_WRITE_MTT(struct mlx4_dev *dev, | |
331 | struct mlx4_cmd_mailbox *mailbox, | |
332 | int num_entries) | |
333 | { | |
334 | return mlx4_cmd(dev, mailbox->dma, num_entries, 0, MLX4_CMD_WRITE_MTT, | |
335 | MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED); | |
336 | } | |
337 | ||
b20e519a | 338 | int __mlx4_mpt_reserve(struct mlx4_dev *dev) |
ea51b377 JM |
339 | { |
340 | struct mlx4_priv *priv = mlx4_priv(dev); | |
341 | ||
342 | return mlx4_bitmap_alloc(&priv->mr_table.mpt_bitmap); | |
343 | } | |
225c7b1f | 344 | |
b20e519a | 345 | static int mlx4_mpt_reserve(struct mlx4_dev *dev) |
ea51b377 JM |
346 | { |
347 | u64 out_param; | |
348 | ||
349 | if (mlx4_is_mfunc(dev)) { | |
350 | if (mlx4_cmd_imm(dev, 0, &out_param, RES_MPT, RES_OP_RESERVE, | |
351 | MLX4_CMD_ALLOC_RES, | |
352 | MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED)) | |
353 | return -1; | |
354 | return get_param_l(&out_param); | |
355 | } | |
b20e519a | 356 | return __mlx4_mpt_reserve(dev); |
ea51b377 JM |
357 | } |
358 | ||
b20e519a | 359 | void __mlx4_mpt_release(struct mlx4_dev *dev, u32 index) |
ea51b377 JM |
360 | { |
361 | struct mlx4_priv *priv = mlx4_priv(dev); | |
362 | ||
363 | mlx4_bitmap_free(&priv->mr_table.mpt_bitmap, index); | |
364 | } | |
365 | ||
b20e519a | 366 | static void mlx4_mpt_release(struct mlx4_dev *dev, u32 index) |
ea51b377 JM |
367 | { |
368 | u64 in_param; | |
369 | ||
370 | if (mlx4_is_mfunc(dev)) { | |
371 | set_param_l(&in_param, index); | |
372 | if (mlx4_cmd(dev, in_param, RES_MPT, RES_OP_RESERVE, | |
373 | MLX4_CMD_FREE_RES, | |
374 | MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED)) | |
375 | mlx4_warn(dev, "Failed to release mr index:%d\n", | |
376 | index); | |
377 | return; | |
378 | } | |
b20e519a | 379 | __mlx4_mpt_release(dev, index); |
ea51b377 JM |
380 | } |
381 | ||
b20e519a | 382 | int __mlx4_mpt_alloc_icm(struct mlx4_dev *dev, u32 index) |
ea51b377 JM |
383 | { |
384 | struct mlx4_mr_table *mr_table = &mlx4_priv(dev)->mr_table; | |
385 | ||
386 | return mlx4_table_get(dev, &mr_table->dmpt_table, index); | |
387 | } | |
388 | ||
b20e519a | 389 | static int mlx4_mpt_alloc_icm(struct mlx4_dev *dev, u32 index) |
ea51b377 JM |
390 | { |
391 | u64 param; | |
392 | ||
393 | if (mlx4_is_mfunc(dev)) { | |
394 | set_param_l(¶m, index); | |
395 | return mlx4_cmd_imm(dev, param, ¶m, RES_MPT, RES_OP_MAP_ICM, | |
396 | MLX4_CMD_ALLOC_RES, | |
397 | MLX4_CMD_TIME_CLASS_A, | |
398 | MLX4_CMD_WRAPPED); | |
399 | } | |
b20e519a | 400 | return __mlx4_mpt_alloc_icm(dev, index); |
ea51b377 JM |
401 | } |
402 | ||
b20e519a | 403 | void __mlx4_mpt_free_icm(struct mlx4_dev *dev, u32 index) |
ea51b377 JM |
404 | { |
405 | struct mlx4_mr_table *mr_table = &mlx4_priv(dev)->mr_table; | |
406 | ||
407 | mlx4_table_put(dev, &mr_table->dmpt_table, index); | |
408 | } | |
409 | ||
b20e519a | 410 | static void mlx4_mpt_free_icm(struct mlx4_dev *dev, u32 index) |
ea51b377 JM |
411 | { |
412 | u64 in_param; | |
413 | ||
414 | if (mlx4_is_mfunc(dev)) { | |
415 | set_param_l(&in_param, index); | |
416 | if (mlx4_cmd(dev, in_param, RES_MPT, RES_OP_MAP_ICM, | |
417 | MLX4_CMD_FREE_RES, MLX4_CMD_TIME_CLASS_A, | |
418 | MLX4_CMD_WRAPPED)) | |
419 | mlx4_warn(dev, "Failed to free icm of mr index:%d\n", | |
420 | index); | |
421 | return; | |
422 | } | |
b20e519a | 423 | return __mlx4_mpt_free_icm(dev, index); |
ea51b377 JM |
424 | } |
425 | ||
426 | int mlx4_mr_alloc(struct mlx4_dev *dev, u32 pd, u64 iova, u64 size, u32 access, | |
427 | int npages, int page_shift, struct mlx4_mr *mr) | |
428 | { | |
429 | u32 index; | |
430 | int err; | |
431 | ||
b20e519a | 432 | index = mlx4_mpt_reserve(dev); |
ea51b377 JM |
433 | if (index == -1) |
434 | return -ENOMEM; | |
435 | ||
436 | err = mlx4_mr_alloc_reserved(dev, index, pd, iova, size, | |
437 | access, npages, page_shift, mr); | |
225c7b1f | 438 | if (err) |
b20e519a | 439 | mlx4_mpt_release(dev, index); |
225c7b1f | 440 | |
225c7b1f RD |
441 | return err; |
442 | } | |
443 | EXPORT_SYMBOL_GPL(mlx4_mr_alloc); | |
444 | ||
61083720 | 445 | static int mlx4_mr_free_reserved(struct mlx4_dev *dev, struct mlx4_mr *mr) |
225c7b1f | 446 | { |
225c7b1f RD |
447 | int err; |
448 | ||
b20e519a | 449 | if (mr->enabled == MLX4_MPT_EN_HW) { |
225c7b1f RD |
450 | err = mlx4_HW2SW_MPT(dev, NULL, |
451 | key_to_hw_index(mr->key) & | |
452 | (dev->caps.num_mpts - 1)); | |
61083720 SM |
453 | if (err) { |
454 | mlx4_warn(dev, "HW2SW_MPT failed (%d),", err); | |
455 | mlx4_warn(dev, "MR has MWs bound to it.\n"); | |
456 | return err; | |
457 | } | |
225c7b1f | 458 | |
b20e519a | 459 | mr->enabled = MLX4_MPT_EN_SW; |
ea51b377 | 460 | } |
225c7b1f | 461 | mlx4_mtt_cleanup(dev, &mr->mtt); |
61083720 SM |
462 | |
463 | return 0; | |
ea51b377 | 464 | } |
ea51b377 | 465 | |
61083720 | 466 | int mlx4_mr_free(struct mlx4_dev *dev, struct mlx4_mr *mr) |
ea51b377 | 467 | { |
61083720 SM |
468 | int ret; |
469 | ||
470 | ret = mlx4_mr_free_reserved(dev, mr); | |
471 | if (ret) | |
472 | return ret; | |
ea51b377 | 473 | if (mr->enabled) |
b20e519a SM |
474 | mlx4_mpt_free_icm(dev, key_to_hw_index(mr->key)); |
475 | mlx4_mpt_release(dev, key_to_hw_index(mr->key)); | |
61083720 SM |
476 | |
477 | return 0; | |
225c7b1f RD |
478 | } |
479 | EXPORT_SYMBOL_GPL(mlx4_mr_free); | |
480 | ||
481 | int mlx4_mr_enable(struct mlx4_dev *dev, struct mlx4_mr *mr) | |
482 | { | |
225c7b1f RD |
483 | struct mlx4_cmd_mailbox *mailbox; |
484 | struct mlx4_mpt_entry *mpt_entry; | |
485 | int err; | |
486 | ||
b20e519a | 487 | err = mlx4_mpt_alloc_icm(dev, key_to_hw_index(mr->key)); |
225c7b1f RD |
488 | if (err) |
489 | return err; | |
490 | ||
491 | mailbox = mlx4_alloc_cmd_mailbox(dev); | |
492 | if (IS_ERR(mailbox)) { | |
493 | err = PTR_ERR(mailbox); | |
494 | goto err_table; | |
495 | } | |
496 | mpt_entry = mailbox->buf; | |
497 | ||
498 | memset(mpt_entry, 0, sizeof *mpt_entry); | |
499 | ||
95d04f07 | 500 | mpt_entry->flags = cpu_to_be32(MLX4_MPT_FLAG_MIO | |
225c7b1f RD |
501 | MLX4_MPT_FLAG_REGION | |
502 | mr->access); | |
225c7b1f RD |
503 | |
504 | mpt_entry->key = cpu_to_be32(key_to_hw_index(mr->key)); | |
95d04f07 | 505 | mpt_entry->pd_flags = cpu_to_be32(mr->pd | MLX4_MPT_PD_FLAG_EN_INV); |
225c7b1f RD |
506 | mpt_entry->start = cpu_to_be64(mr->iova); |
507 | mpt_entry->length = cpu_to_be64(mr->size); | |
508 | mpt_entry->entity_size = cpu_to_be32(mr->mtt.page_shift); | |
95d04f07 | 509 | |
b2d9308a JM |
510 | if (mr->mtt.order < 0) { |
511 | mpt_entry->flags |= cpu_to_be32(MLX4_MPT_FLAG_PHYSICAL); | |
2b8fb286 | 512 | mpt_entry->mtt_addr = 0; |
95d04f07 | 513 | } else { |
2b8fb286 MA |
514 | mpt_entry->mtt_addr = cpu_to_be64(mlx4_mtt_addr(dev, |
515 | &mr->mtt)); | |
95d04f07 RD |
516 | } |
517 | ||
518 | if (mr->mtt.order >= 0 && mr->mtt.page_shift == 0) { | |
519 | /* fast register MR in free state */ | |
520 | mpt_entry->flags |= cpu_to_be32(MLX4_MPT_FLAG_FREE); | |
c9257433 VS |
521 | mpt_entry->pd_flags |= cpu_to_be32(MLX4_MPT_PD_FLAG_FAST_REG | |
522 | MLX4_MPT_PD_FLAG_RAE); | |
2b8fb286 | 523 | mpt_entry->mtt_sz = cpu_to_be32(1 << mr->mtt.order); |
95d04f07 RD |
524 | } else { |
525 | mpt_entry->flags |= cpu_to_be32(MLX4_MPT_FLAG_SW_OWNS); | |
526 | } | |
225c7b1f RD |
527 | |
528 | err = mlx4_SW2HW_MPT(dev, mailbox, | |
529 | key_to_hw_index(mr->key) & (dev->caps.num_mpts - 1)); | |
530 | if (err) { | |
531 | mlx4_warn(dev, "SW2HW_MPT failed (%d)\n", err); | |
532 | goto err_cmd; | |
533 | } | |
b20e519a | 534 | mr->enabled = MLX4_MPT_EN_HW; |
225c7b1f RD |
535 | |
536 | mlx4_free_cmd_mailbox(dev, mailbox); | |
537 | ||
538 | return 0; | |
539 | ||
540 | err_cmd: | |
541 | mlx4_free_cmd_mailbox(dev, mailbox); | |
542 | ||
543 | err_table: | |
b20e519a | 544 | mlx4_mpt_free_icm(dev, key_to_hw_index(mr->key)); |
225c7b1f RD |
545 | return err; |
546 | } | |
547 | EXPORT_SYMBOL_GPL(mlx4_mr_enable); | |
548 | ||
d7bb58fb JM |
549 | static int mlx4_write_mtt_chunk(struct mlx4_dev *dev, struct mlx4_mtt *mtt, |
550 | int start_index, int npages, u64 *page_list) | |
225c7b1f | 551 | { |
d7bb58fb JM |
552 | struct mlx4_priv *priv = mlx4_priv(dev); |
553 | __be64 *mtts; | |
554 | dma_addr_t dma_handle; | |
555 | int i; | |
d7bb58fb | 556 | |
2b8fb286 MA |
557 | mtts = mlx4_table_find(&priv->mr_table.mtt_table, mtt->offset + |
558 | start_index, &dma_handle); | |
d7bb58fb | 559 | |
d7bb58fb JM |
560 | if (!mtts) |
561 | return -ENOMEM; | |
562 | ||
e727f5cd RD |
563 | dma_sync_single_for_cpu(&dev->pdev->dev, dma_handle, |
564 | npages * sizeof (u64), DMA_TO_DEVICE); | |
565 | ||
d7bb58fb JM |
566 | for (i = 0; i < npages; ++i) |
567 | mtts[i] = cpu_to_be64(page_list[i] | MLX4_MTT_FLAG_PRESENT); | |
568 | ||
e727f5cd RD |
569 | dma_sync_single_for_device(&dev->pdev->dev, dma_handle, |
570 | npages * sizeof (u64), DMA_TO_DEVICE); | |
d7bb58fb JM |
571 | |
572 | return 0; | |
225c7b1f RD |
573 | } |
574 | ||
c82e9aa0 | 575 | int __mlx4_write_mtt(struct mlx4_dev *dev, struct mlx4_mtt *mtt, |
ea51b377 | 576 | int start_index, int npages, u64 *page_list) |
225c7b1f | 577 | { |
ea51b377 | 578 | int err = 0; |
d7bb58fb | 579 | int chunk; |
2b8fb286 MA |
580 | int mtts_per_page; |
581 | int max_mtts_first_page; | |
582 | ||
583 | /* compute how may mtts fit in the first page */ | |
584 | mtts_per_page = PAGE_SIZE / sizeof(u64); | |
585 | max_mtts_first_page = mtts_per_page - (mtt->offset + start_index) | |
586 | % mtts_per_page; | |
587 | ||
588 | chunk = min_t(int, max_mtts_first_page, npages); | |
225c7b1f | 589 | |
225c7b1f | 590 | while (npages > 0) { |
d7bb58fb | 591 | err = mlx4_write_mtt_chunk(dev, mtt, start_index, chunk, page_list); |
225c7b1f | 592 | if (err) |
d7bb58fb | 593 | return err; |
d7bb58fb JM |
594 | npages -= chunk; |
595 | start_index += chunk; | |
596 | page_list += chunk; | |
2b8fb286 MA |
597 | |
598 | chunk = min_t(int, mtts_per_page, npages); | |
225c7b1f | 599 | } |
ea51b377 JM |
600 | return err; |
601 | } | |
225c7b1f | 602 | |
ea51b377 JM |
603 | int mlx4_write_mtt(struct mlx4_dev *dev, struct mlx4_mtt *mtt, |
604 | int start_index, int npages, u64 *page_list) | |
605 | { | |
606 | struct mlx4_cmd_mailbox *mailbox = NULL; | |
607 | __be64 *inbox = NULL; | |
608 | int chunk; | |
609 | int err = 0; | |
610 | int i; | |
611 | ||
612 | if (mtt->order < 0) | |
613 | return -EINVAL; | |
614 | ||
615 | if (mlx4_is_mfunc(dev)) { | |
616 | mailbox = mlx4_alloc_cmd_mailbox(dev); | |
617 | if (IS_ERR(mailbox)) | |
618 | return PTR_ERR(mailbox); | |
619 | inbox = mailbox->buf; | |
620 | ||
621 | while (npages > 0) { | |
2b8fb286 MA |
622 | chunk = min_t(int, MLX4_MAILBOX_SIZE / sizeof(u64) - 2, |
623 | npages); | |
624 | inbox[0] = cpu_to_be64(mtt->offset + start_index); | |
ea51b377 JM |
625 | inbox[1] = 0; |
626 | for (i = 0; i < chunk; ++i) | |
627 | inbox[i + 2] = cpu_to_be64(page_list[i] | | |
628 | MLX4_MTT_FLAG_PRESENT); | |
629 | err = mlx4_WRITE_MTT(dev, mailbox, chunk); | |
630 | if (err) { | |
631 | mlx4_free_cmd_mailbox(dev, mailbox); | |
632 | return err; | |
633 | } | |
634 | ||
635 | npages -= chunk; | |
636 | start_index += chunk; | |
637 | page_list += chunk; | |
638 | } | |
639 | mlx4_free_cmd_mailbox(dev, mailbox); | |
640 | return err; | |
641 | } | |
642 | ||
643 | return __mlx4_write_mtt(dev, mtt, start_index, npages, page_list); | |
225c7b1f RD |
644 | } |
645 | EXPORT_SYMBOL_GPL(mlx4_write_mtt); | |
646 | ||
647 | int mlx4_buf_write_mtt(struct mlx4_dev *dev, struct mlx4_mtt *mtt, | |
648 | struct mlx4_buf *buf) | |
649 | { | |
650 | u64 *page_list; | |
651 | int err; | |
652 | int i; | |
653 | ||
654 | page_list = kmalloc(buf->npages * sizeof *page_list, GFP_KERNEL); | |
655 | if (!page_list) | |
656 | return -ENOMEM; | |
657 | ||
658 | for (i = 0; i < buf->npages; ++i) | |
659 | if (buf->nbufs == 1) | |
b57aacfa | 660 | page_list[i] = buf->direct.map + (i << buf->page_shift); |
225c7b1f | 661 | else |
b57aacfa | 662 | page_list[i] = buf->page_list[i].map; |
225c7b1f RD |
663 | |
664 | err = mlx4_write_mtt(dev, mtt, 0, buf->npages, page_list); | |
665 | ||
666 | kfree(page_list); | |
667 | return err; | |
668 | } | |
669 | EXPORT_SYMBOL_GPL(mlx4_buf_write_mtt); | |
670 | ||
3d73c288 | 671 | int mlx4_init_mr_table(struct mlx4_dev *dev) |
225c7b1f | 672 | { |
ea51b377 JM |
673 | struct mlx4_priv *priv = mlx4_priv(dev); |
674 | struct mlx4_mr_table *mr_table = &priv->mr_table; | |
225c7b1f RD |
675 | int err; |
676 | ||
ea51b377 JM |
677 | if (!is_power_of_2(dev->caps.num_mpts)) |
678 | return -EINVAL; | |
679 | ||
680 | /* Nothing to do for slaves - all MR handling is forwarded | |
681 | * to the master */ | |
682 | if (mlx4_is_slave(dev)) | |
683 | return 0; | |
684 | ||
225c7b1f | 685 | err = mlx4_bitmap_init(&mr_table->mpt_bitmap, dev->caps.num_mpts, |
93fc9e1b | 686 | ~0, dev->caps.reserved_mrws, 0); |
225c7b1f RD |
687 | if (err) |
688 | return err; | |
689 | ||
690 | err = mlx4_buddy_init(&mr_table->mtt_buddy, | |
3de819e6 | 691 | ilog2((u32)dev->caps.num_mtts / |
2b8fb286 | 692 | (1 << log_mtts_per_seg))); |
225c7b1f RD |
693 | if (err) |
694 | goto err_buddy; | |
695 | ||
696 | if (dev->caps.reserved_mtts) { | |
ea51b377 JM |
697 | priv->reserved_mtts = |
698 | mlx4_alloc_mtt_range(dev, | |
699 | fls(dev->caps.reserved_mtts - 1)); | |
700 | if (priv->reserved_mtts < 0) { | |
3de819e6 | 701 | mlx4_warn(dev, "MTT table of order %u is too small.\n", |
225c7b1f RD |
702 | mr_table->mtt_buddy.max_order); |
703 | err = -ENOMEM; | |
704 | goto err_reserve_mtts; | |
705 | } | |
706 | } | |
707 | ||
708 | return 0; | |
709 | ||
710 | err_reserve_mtts: | |
711 | mlx4_buddy_cleanup(&mr_table->mtt_buddy); | |
712 | ||
713 | err_buddy: | |
714 | mlx4_bitmap_cleanup(&mr_table->mpt_bitmap); | |
715 | ||
716 | return err; | |
717 | } | |
718 | ||
719 | void mlx4_cleanup_mr_table(struct mlx4_dev *dev) | |
720 | { | |
ea51b377 JM |
721 | struct mlx4_priv *priv = mlx4_priv(dev); |
722 | struct mlx4_mr_table *mr_table = &priv->mr_table; | |
225c7b1f | 723 | |
ea51b377 JM |
724 | if (mlx4_is_slave(dev)) |
725 | return; | |
726 | if (priv->reserved_mtts >= 0) | |
727 | mlx4_free_mtt_range(dev, priv->reserved_mtts, | |
728 | fls(dev->caps.reserved_mtts - 1)); | |
225c7b1f RD |
729 | mlx4_buddy_cleanup(&mr_table->mtt_buddy); |
730 | mlx4_bitmap_cleanup(&mr_table->mpt_bitmap); | |
731 | } | |
8ad11fb6 JM |
732 | |
733 | static inline int mlx4_check_fmr(struct mlx4_fmr *fmr, u64 *page_list, | |
734 | int npages, u64 iova) | |
735 | { | |
736 | int i, page_mask; | |
737 | ||
738 | if (npages > fmr->max_pages) | |
739 | return -EINVAL; | |
740 | ||
741 | page_mask = (1 << fmr->page_shift) - 1; | |
742 | ||
743 | /* We are getting page lists, so va must be page aligned. */ | |
744 | if (iova & page_mask) | |
745 | return -EINVAL; | |
746 | ||
747 | /* Trust the user not to pass misaligned data in page_list */ | |
748 | if (0) | |
749 | for (i = 0; i < npages; ++i) { | |
750 | if (page_list[i] & ~page_mask) | |
751 | return -EINVAL; | |
752 | } | |
753 | ||
754 | if (fmr->maps >= fmr->max_maps) | |
755 | return -EINVAL; | |
756 | ||
757 | return 0; | |
758 | } | |
759 | ||
760 | int mlx4_map_phys_fmr(struct mlx4_dev *dev, struct mlx4_fmr *fmr, u64 *page_list, | |
761 | int npages, u64 iova, u32 *lkey, u32 *rkey) | |
762 | { | |
763 | u32 key; | |
764 | int i, err; | |
765 | ||
766 | err = mlx4_check_fmr(fmr, page_list, npages, iova); | |
767 | if (err) | |
768 | return err; | |
769 | ||
770 | ++fmr->maps; | |
771 | ||
772 | key = key_to_hw_index(fmr->mr.key); | |
773 | key += dev->caps.num_mpts; | |
774 | *lkey = *rkey = fmr->mr.key = hw_index_to_key(key); | |
775 | ||
776 | *(u8 *) fmr->mpt = MLX4_MPT_STATUS_SW; | |
777 | ||
778 | /* Make sure MPT status is visible before writing MTT entries */ | |
779 | wmb(); | |
780 | ||
e727f5cd RD |
781 | dma_sync_single_for_cpu(&dev->pdev->dev, fmr->dma_handle, |
782 | npages * sizeof(u64), DMA_TO_DEVICE); | |
783 | ||
8ad11fb6 JM |
784 | for (i = 0; i < npages; ++i) |
785 | fmr->mtts[i] = cpu_to_be64(page_list[i] | MLX4_MTT_FLAG_PRESENT); | |
786 | ||
e727f5cd RD |
787 | dma_sync_single_for_device(&dev->pdev->dev, fmr->dma_handle, |
788 | npages * sizeof(u64), DMA_TO_DEVICE); | |
8ad11fb6 JM |
789 | |
790 | fmr->mpt->key = cpu_to_be32(key); | |
791 | fmr->mpt->lkey = cpu_to_be32(key); | |
792 | fmr->mpt->length = cpu_to_be64(npages * (1ull << fmr->page_shift)); | |
793 | fmr->mpt->start = cpu_to_be64(iova); | |
794 | ||
795 | /* Make MTT entries are visible before setting MPT status */ | |
796 | wmb(); | |
797 | ||
798 | *(u8 *) fmr->mpt = MLX4_MPT_STATUS_HW; | |
799 | ||
800 | /* Make sure MPT status is visible before consumer can use FMR */ | |
801 | wmb(); | |
802 | ||
803 | return 0; | |
804 | } | |
805 | EXPORT_SYMBOL_GPL(mlx4_map_phys_fmr); | |
806 | ||
807 | int mlx4_fmr_alloc(struct mlx4_dev *dev, u32 pd, u32 access, int max_pages, | |
808 | int max_maps, u8 page_shift, struct mlx4_fmr *fmr) | |
809 | { | |
810 | struct mlx4_priv *priv = mlx4_priv(dev); | |
8ad11fb6 JM |
811 | int err = -ENOMEM; |
812 | ||
a5bbe892 EC |
813 | if (max_maps > dev->caps.max_fmr_maps) |
814 | return -EINVAL; | |
815 | ||
c5057ddc | 816 | if (page_shift < (ffs(dev->caps.page_size_cap) - 1) || page_shift >= 32) |
8ad11fb6 JM |
817 | return -EINVAL; |
818 | ||
819 | /* All MTTs must fit in the same page */ | |
820 | if (max_pages * sizeof *fmr->mtts > PAGE_SIZE) | |
821 | return -EINVAL; | |
822 | ||
823 | fmr->page_shift = page_shift; | |
824 | fmr->max_pages = max_pages; | |
825 | fmr->max_maps = max_maps; | |
826 | fmr->maps = 0; | |
827 | ||
828 | err = mlx4_mr_alloc(dev, pd, 0, 0, access, max_pages, | |
829 | page_shift, &fmr->mr); | |
830 | if (err) | |
831 | return err; | |
832 | ||
8ad11fb6 | 833 | fmr->mtts = mlx4_table_find(&priv->mr_table.mtt_table, |
2b8fb286 | 834 | fmr->mr.mtt.offset, |
8ad11fb6 | 835 | &fmr->dma_handle); |
2b8fb286 | 836 | |
8ad11fb6 JM |
837 | if (!fmr->mtts) { |
838 | err = -ENOMEM; | |
839 | goto err_free; | |
840 | } | |
841 | ||
8ad11fb6 JM |
842 | return 0; |
843 | ||
844 | err_free: | |
61083720 | 845 | (void) mlx4_mr_free(dev, &fmr->mr); |
8ad11fb6 JM |
846 | return err; |
847 | } | |
848 | EXPORT_SYMBOL_GPL(mlx4_fmr_alloc); | |
849 | ||
850 | int mlx4_fmr_enable(struct mlx4_dev *dev, struct mlx4_fmr *fmr) | |
851 | { | |
11e75a74 JM |
852 | struct mlx4_priv *priv = mlx4_priv(dev); |
853 | int err; | |
854 | ||
855 | err = mlx4_mr_enable(dev, &fmr->mr); | |
856 | if (err) | |
857 | return err; | |
858 | ||
859 | fmr->mpt = mlx4_table_find(&priv->mr_table.dmpt_table, | |
860 | key_to_hw_index(fmr->mr.key), NULL); | |
861 | if (!fmr->mpt) | |
862 | return -ENOMEM; | |
863 | ||
864 | return 0; | |
8ad11fb6 JM |
865 | } |
866 | EXPORT_SYMBOL_GPL(mlx4_fmr_enable); | |
867 | ||
868 | void mlx4_fmr_unmap(struct mlx4_dev *dev, struct mlx4_fmr *fmr, | |
869 | u32 *lkey, u32 *rkey) | |
870 | { | |
ea51b377 JM |
871 | struct mlx4_cmd_mailbox *mailbox; |
872 | int err; | |
873 | ||
8ad11fb6 JM |
874 | if (!fmr->maps) |
875 | return; | |
876 | ||
8ad11fb6 JM |
877 | fmr->maps = 0; |
878 | ||
ea51b377 JM |
879 | mailbox = mlx4_alloc_cmd_mailbox(dev); |
880 | if (IS_ERR(mailbox)) { | |
881 | err = PTR_ERR(mailbox); | |
882 | printk(KERN_WARNING "mlx4_ib: mlx4_alloc_cmd_mailbox" | |
883 | " failed (%d)\n", err); | |
884 | return; | |
885 | } | |
886 | ||
887 | err = mlx4_HW2SW_MPT(dev, NULL, | |
888 | key_to_hw_index(fmr->mr.key) & | |
889 | (dev->caps.num_mpts - 1)); | |
890 | mlx4_free_cmd_mailbox(dev, mailbox); | |
891 | if (err) { | |
892 | printk(KERN_WARNING "mlx4_ib: mlx4_HW2SW_MPT failed (%d)\n", | |
893 | err); | |
894 | return; | |
895 | } | |
b20e519a | 896 | fmr->mr.enabled = MLX4_MPT_EN_SW; |
8ad11fb6 JM |
897 | } |
898 | EXPORT_SYMBOL_GPL(mlx4_fmr_unmap); | |
899 | ||
900 | int mlx4_fmr_free(struct mlx4_dev *dev, struct mlx4_fmr *fmr) | |
901 | { | |
61083720 SM |
902 | int ret; |
903 | ||
8ad11fb6 JM |
904 | if (fmr->maps) |
905 | return -EBUSY; | |
906 | ||
61083720 SM |
907 | ret = mlx4_mr_free(dev, &fmr->mr); |
908 | if (ret) | |
909 | return ret; | |
b20e519a | 910 | fmr->mr.enabled = MLX4_MPT_DISABLED; |
8ad11fb6 JM |
911 | |
912 | return 0; | |
913 | } | |
914 | EXPORT_SYMBOL_GPL(mlx4_fmr_free); | |
915 | ||
916 | int mlx4_SYNC_TPT(struct mlx4_dev *dev) | |
917 | { | |
f9baff50 | 918 | return mlx4_cmd(dev, 0, 0, 0, MLX4_CMD_SYNC_TPT, 1000, |
5e92d803 | 919 | MLX4_CMD_NATIVE); |
8ad11fb6 JM |
920 | } |
921 | EXPORT_SYMBOL_GPL(mlx4_SYNC_TPT); |