2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005, 2006, 2007, 2008 Mellanox Technologies. All rights reserved.
4 * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved.
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:
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
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.
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
35 #include <linux/errno.h>
36 #include <linux/export.h>
37 #include <linux/slab.h>
38 #include <linux/kernel.h>
39 #include <linux/vmalloc.h>
41 #include <linux/mlx4/cmd.h>
46 static u32
mlx4_buddy_alloc(struct mlx4_buddy
*buddy
, int order
)
52 spin_lock(&buddy
->lock
);
54 for (o
= order
; o
<= buddy
->max_order
; ++o
)
55 if (buddy
->num_free
[o
]) {
56 m
= 1 << (buddy
->max_order
- o
);
57 seg
= find_first_bit(buddy
->bits
[o
], m
);
62 spin_unlock(&buddy
->lock
);
66 clear_bit(seg
, buddy
->bits
[o
]);
72 set_bit(seg
^ 1, buddy
->bits
[o
]);
76 spin_unlock(&buddy
->lock
);
83 static void mlx4_buddy_free(struct mlx4_buddy
*buddy
, u32 seg
, int order
)
87 spin_lock(&buddy
->lock
);
89 while (test_bit(seg
^ 1, buddy
->bits
[order
])) {
90 clear_bit(seg
^ 1, buddy
->bits
[order
]);
91 --buddy
->num_free
[order
];
96 set_bit(seg
, buddy
->bits
[order
]);
97 ++buddy
->num_free
[order
];
99 spin_unlock(&buddy
->lock
);
102 static int mlx4_buddy_init(struct mlx4_buddy
*buddy
, int max_order
)
106 buddy
->max_order
= max_order
;
107 spin_lock_init(&buddy
->lock
);
109 buddy
->bits
= kcalloc(buddy
->max_order
+ 1, sizeof (long *),
111 buddy
->num_free
= kcalloc((buddy
->max_order
+ 1), sizeof *buddy
->num_free
,
113 if (!buddy
->bits
|| !buddy
->num_free
)
116 for (i
= 0; i
<= buddy
->max_order
; ++i
) {
117 s
= BITS_TO_LONGS(1 << (buddy
->max_order
- i
));
118 buddy
->bits
[i
] = kcalloc(s
, sizeof (long), GFP_KERNEL
| __GFP_NOWARN
);
119 if (!buddy
->bits
[i
]) {
120 buddy
->bits
[i
] = vzalloc(s
* sizeof(long));
126 set_bit(0, buddy
->bits
[buddy
->max_order
]);
127 buddy
->num_free
[buddy
->max_order
] = 1;
132 for (i
= 0; i
<= buddy
->max_order
; ++i
)
133 if (buddy
->bits
[i
] && is_vmalloc_addr(buddy
->bits
[i
]))
134 vfree(buddy
->bits
[i
]);
136 kfree(buddy
->bits
[i
]);
140 kfree(buddy
->num_free
);
145 static void mlx4_buddy_cleanup(struct mlx4_buddy
*buddy
)
149 for (i
= 0; i
<= buddy
->max_order
; ++i
)
150 if (is_vmalloc_addr(buddy
->bits
[i
]))
151 vfree(buddy
->bits
[i
]);
153 kfree(buddy
->bits
[i
]);
156 kfree(buddy
->num_free
);
159 u32
__mlx4_alloc_mtt_range(struct mlx4_dev
*dev
, int order
)
161 struct mlx4_mr_table
*mr_table
= &mlx4_priv(dev
)->mr_table
;
166 seg_order
= max_t(int, order
- log_mtts_per_seg
, 0);
168 seg
= mlx4_buddy_alloc(&mr_table
->mtt_buddy
, seg_order
);
172 offset
= seg
* (1 << log_mtts_per_seg
);
174 if (mlx4_table_get_range(dev
, &mr_table
->mtt_table
, offset
,
175 offset
+ (1 << order
) - 1)) {
176 mlx4_buddy_free(&mr_table
->mtt_buddy
, seg
, seg_order
);
183 static u32
mlx4_alloc_mtt_range(struct mlx4_dev
*dev
, int order
)
189 if (mlx4_is_mfunc(dev
)) {
190 set_param_l(&in_param
, order
);
191 err
= mlx4_cmd_imm(dev
, in_param
, &out_param
, RES_MTT
,
192 RES_OP_RESERVE_AND_MAP
,
194 MLX4_CMD_TIME_CLASS_A
,
198 return get_param_l(&out_param
);
200 return __mlx4_alloc_mtt_range(dev
, order
);
203 int mlx4_mtt_init(struct mlx4_dev
*dev
, int npages
, int page_shift
,
204 struct mlx4_mtt
*mtt
)
210 mtt
->page_shift
= MLX4_ICM_PAGE_SHIFT
;
213 mtt
->page_shift
= page_shift
;
215 for (mtt
->order
= 0, i
= 1; i
< npages
; i
<<= 1)
218 mtt
->offset
= mlx4_alloc_mtt_range(dev
, mtt
->order
);
219 if (mtt
->offset
== -1)
224 EXPORT_SYMBOL_GPL(mlx4_mtt_init
);
226 void __mlx4_free_mtt_range(struct mlx4_dev
*dev
, u32 offset
, int order
)
230 struct mlx4_mr_table
*mr_table
= &mlx4_priv(dev
)->mr_table
;
232 seg_order
= max_t(int, order
- log_mtts_per_seg
, 0);
233 first_seg
= offset
/ (1 << log_mtts_per_seg
);
235 mlx4_buddy_free(&mr_table
->mtt_buddy
, first_seg
, seg_order
);
236 mlx4_table_put_range(dev
, &mr_table
->mtt_table
, offset
,
237 offset
+ (1 << order
) - 1);
240 static void mlx4_free_mtt_range(struct mlx4_dev
*dev
, u32 offset
, int order
)
245 if (mlx4_is_mfunc(dev
)) {
246 set_param_l(&in_param
, offset
);
247 set_param_h(&in_param
, order
);
248 err
= mlx4_cmd(dev
, in_param
, RES_MTT
, RES_OP_RESERVE_AND_MAP
,
250 MLX4_CMD_TIME_CLASS_A
,
253 mlx4_warn(dev
, "Failed to free mtt range at:"
254 "%d order:%d\n", offset
, order
);
257 __mlx4_free_mtt_range(dev
, offset
, order
);
260 void mlx4_mtt_cleanup(struct mlx4_dev
*dev
, struct mlx4_mtt
*mtt
)
265 mlx4_free_mtt_range(dev
, mtt
->offset
, mtt
->order
);
267 EXPORT_SYMBOL_GPL(mlx4_mtt_cleanup
);
269 u64
mlx4_mtt_addr(struct mlx4_dev
*dev
, struct mlx4_mtt
*mtt
)
271 return (u64
) mtt
->offset
* dev
->caps
.mtt_entry_sz
;
273 EXPORT_SYMBOL_GPL(mlx4_mtt_addr
);
275 static u32
hw_index_to_key(u32 ind
)
277 return (ind
>> 24) | (ind
<< 8);
280 static u32
key_to_hw_index(u32 key
)
282 return (key
<< 24) | (key
>> 8);
285 static int mlx4_SW2HW_MPT(struct mlx4_dev
*dev
, struct mlx4_cmd_mailbox
*mailbox
,
288 return mlx4_cmd(dev
, mailbox
->dma
, mpt_index
,
289 0, MLX4_CMD_SW2HW_MPT
, MLX4_CMD_TIME_CLASS_B
,
293 static int mlx4_HW2SW_MPT(struct mlx4_dev
*dev
, struct mlx4_cmd_mailbox
*mailbox
,
296 return mlx4_cmd_box(dev
, 0, mailbox
? mailbox
->dma
: 0, mpt_index
,
297 !mailbox
, MLX4_CMD_HW2SW_MPT
,
298 MLX4_CMD_TIME_CLASS_B
, MLX4_CMD_WRAPPED
);
301 static int mlx4_mr_alloc_reserved(struct mlx4_dev
*dev
, u32 mridx
, u32 pd
,
302 u64 iova
, u64 size
, u32 access
, int npages
,
303 int page_shift
, struct mlx4_mr
*mr
)
309 mr
->enabled
= MLX4_MPT_DISABLED
;
310 mr
->key
= hw_index_to_key(mridx
);
312 return mlx4_mtt_init(dev
, npages
, page_shift
, &mr
->mtt
);
315 static int mlx4_WRITE_MTT(struct mlx4_dev
*dev
,
316 struct mlx4_cmd_mailbox
*mailbox
,
319 return mlx4_cmd(dev
, mailbox
->dma
, num_entries
, 0, MLX4_CMD_WRITE_MTT
,
320 MLX4_CMD_TIME_CLASS_A
, MLX4_CMD_WRAPPED
);
323 int __mlx4_mpt_reserve(struct mlx4_dev
*dev
)
325 struct mlx4_priv
*priv
= mlx4_priv(dev
);
327 return mlx4_bitmap_alloc(&priv
->mr_table
.mpt_bitmap
);
330 static int mlx4_mpt_reserve(struct mlx4_dev
*dev
)
334 if (mlx4_is_mfunc(dev
)) {
335 if (mlx4_cmd_imm(dev
, 0, &out_param
, RES_MPT
, RES_OP_RESERVE
,
337 MLX4_CMD_TIME_CLASS_A
, MLX4_CMD_WRAPPED
))
339 return get_param_l(&out_param
);
341 return __mlx4_mpt_reserve(dev
);
344 void __mlx4_mpt_release(struct mlx4_dev
*dev
, u32 index
)
346 struct mlx4_priv
*priv
= mlx4_priv(dev
);
348 mlx4_bitmap_free(&priv
->mr_table
.mpt_bitmap
, index
, MLX4_NO_RR
);
351 static void mlx4_mpt_release(struct mlx4_dev
*dev
, u32 index
)
355 if (mlx4_is_mfunc(dev
)) {
356 set_param_l(&in_param
, index
);
357 if (mlx4_cmd(dev
, in_param
, RES_MPT
, RES_OP_RESERVE
,
359 MLX4_CMD_TIME_CLASS_A
, MLX4_CMD_WRAPPED
))
360 mlx4_warn(dev
, "Failed to release mr index:%d\n",
364 __mlx4_mpt_release(dev
, index
);
367 int __mlx4_mpt_alloc_icm(struct mlx4_dev
*dev
, u32 index
)
369 struct mlx4_mr_table
*mr_table
= &mlx4_priv(dev
)->mr_table
;
371 return mlx4_table_get(dev
, &mr_table
->dmpt_table
, index
);
374 static int mlx4_mpt_alloc_icm(struct mlx4_dev
*dev
, u32 index
)
378 if (mlx4_is_mfunc(dev
)) {
379 set_param_l(¶m
, index
);
380 return mlx4_cmd_imm(dev
, param
, ¶m
, RES_MPT
, RES_OP_MAP_ICM
,
382 MLX4_CMD_TIME_CLASS_A
,
385 return __mlx4_mpt_alloc_icm(dev
, index
);
388 void __mlx4_mpt_free_icm(struct mlx4_dev
*dev
, u32 index
)
390 struct mlx4_mr_table
*mr_table
= &mlx4_priv(dev
)->mr_table
;
392 mlx4_table_put(dev
, &mr_table
->dmpt_table
, index
);
395 static void mlx4_mpt_free_icm(struct mlx4_dev
*dev
, u32 index
)
399 if (mlx4_is_mfunc(dev
)) {
400 set_param_l(&in_param
, index
);
401 if (mlx4_cmd(dev
, in_param
, RES_MPT
, RES_OP_MAP_ICM
,
402 MLX4_CMD_FREE_RES
, MLX4_CMD_TIME_CLASS_A
,
404 mlx4_warn(dev
, "Failed to free icm of mr index:%d\n",
408 return __mlx4_mpt_free_icm(dev
, index
);
411 int mlx4_mr_alloc(struct mlx4_dev
*dev
, u32 pd
, u64 iova
, u64 size
, u32 access
,
412 int npages
, int page_shift
, struct mlx4_mr
*mr
)
417 index
= mlx4_mpt_reserve(dev
);
421 err
= mlx4_mr_alloc_reserved(dev
, index
, pd
, iova
, size
,
422 access
, npages
, page_shift
, mr
);
424 mlx4_mpt_release(dev
, index
);
428 EXPORT_SYMBOL_GPL(mlx4_mr_alloc
);
430 static int mlx4_mr_free_reserved(struct mlx4_dev
*dev
, struct mlx4_mr
*mr
)
434 if (mr
->enabled
== MLX4_MPT_EN_HW
) {
435 err
= mlx4_HW2SW_MPT(dev
, NULL
,
436 key_to_hw_index(mr
->key
) &
437 (dev
->caps
.num_mpts
- 1));
439 mlx4_warn(dev
, "HW2SW_MPT failed (%d),", err
);
440 mlx4_warn(dev
, "MR has MWs bound to it.\n");
444 mr
->enabled
= MLX4_MPT_EN_SW
;
446 mlx4_mtt_cleanup(dev
, &mr
->mtt
);
451 int mlx4_mr_free(struct mlx4_dev
*dev
, struct mlx4_mr
*mr
)
455 ret
= mlx4_mr_free_reserved(dev
, mr
);
459 mlx4_mpt_free_icm(dev
, key_to_hw_index(mr
->key
));
460 mlx4_mpt_release(dev
, key_to_hw_index(mr
->key
));
464 EXPORT_SYMBOL_GPL(mlx4_mr_free
);
466 int mlx4_mr_enable(struct mlx4_dev
*dev
, struct mlx4_mr
*mr
)
468 struct mlx4_cmd_mailbox
*mailbox
;
469 struct mlx4_mpt_entry
*mpt_entry
;
472 err
= mlx4_mpt_alloc_icm(dev
, key_to_hw_index(mr
->key
));
476 mailbox
= mlx4_alloc_cmd_mailbox(dev
);
477 if (IS_ERR(mailbox
)) {
478 err
= PTR_ERR(mailbox
);
481 mpt_entry
= mailbox
->buf
;
482 mpt_entry
->flags
= cpu_to_be32(MLX4_MPT_FLAG_MIO
|
483 MLX4_MPT_FLAG_REGION
|
486 mpt_entry
->key
= cpu_to_be32(key_to_hw_index(mr
->key
));
487 mpt_entry
->pd_flags
= cpu_to_be32(mr
->pd
| MLX4_MPT_PD_FLAG_EN_INV
);
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
);
492 if (mr
->mtt
.order
< 0) {
493 mpt_entry
->flags
|= cpu_to_be32(MLX4_MPT_FLAG_PHYSICAL
);
494 mpt_entry
->mtt_addr
= 0;
496 mpt_entry
->mtt_addr
= cpu_to_be64(mlx4_mtt_addr(dev
,
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
);
503 mpt_entry
->pd_flags
|= cpu_to_be32(MLX4_MPT_PD_FLAG_FAST_REG
|
504 MLX4_MPT_PD_FLAG_RAE
);
505 mpt_entry
->mtt_sz
= cpu_to_be32(1 << mr
->mtt
.order
);
507 mpt_entry
->flags
|= cpu_to_be32(MLX4_MPT_FLAG_SW_OWNS
);
510 err
= mlx4_SW2HW_MPT(dev
, mailbox
,
511 key_to_hw_index(mr
->key
) & (dev
->caps
.num_mpts
- 1));
513 mlx4_warn(dev
, "SW2HW_MPT failed (%d)\n", err
);
516 mr
->enabled
= MLX4_MPT_EN_HW
;
518 mlx4_free_cmd_mailbox(dev
, mailbox
);
523 mlx4_free_cmd_mailbox(dev
, mailbox
);
526 mlx4_mpt_free_icm(dev
, key_to_hw_index(mr
->key
));
529 EXPORT_SYMBOL_GPL(mlx4_mr_enable
);
531 static int mlx4_write_mtt_chunk(struct mlx4_dev
*dev
, struct mlx4_mtt
*mtt
,
532 int start_index
, int npages
, u64
*page_list
)
534 struct mlx4_priv
*priv
= mlx4_priv(dev
);
536 dma_addr_t dma_handle
;
539 mtts
= mlx4_table_find(&priv
->mr_table
.mtt_table
, mtt
->offset
+
540 start_index
, &dma_handle
);
545 dma_sync_single_for_cpu(&dev
->pdev
->dev
, dma_handle
,
546 npages
* sizeof (u64
), DMA_TO_DEVICE
);
548 for (i
= 0; i
< npages
; ++i
)
549 mtts
[i
] = cpu_to_be64(page_list
[i
] | MLX4_MTT_FLAG_PRESENT
);
551 dma_sync_single_for_device(&dev
->pdev
->dev
, dma_handle
,
552 npages
* sizeof (u64
), DMA_TO_DEVICE
);
557 int __mlx4_write_mtt(struct mlx4_dev
*dev
, struct mlx4_mtt
*mtt
,
558 int start_index
, int npages
, u64
*page_list
)
563 int max_mtts_first_page
;
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
)
570 chunk
= min_t(int, max_mtts_first_page
, npages
);
573 err
= mlx4_write_mtt_chunk(dev
, mtt
, start_index
, chunk
, page_list
);
577 start_index
+= chunk
;
580 chunk
= min_t(int, mtts_per_page
, npages
);
585 int mlx4_write_mtt(struct mlx4_dev
*dev
, struct mlx4_mtt
*mtt
,
586 int start_index
, int npages
, u64
*page_list
)
588 struct mlx4_cmd_mailbox
*mailbox
= NULL
;
589 __be64
*inbox
= NULL
;
597 if (mlx4_is_mfunc(dev
)) {
598 mailbox
= mlx4_alloc_cmd_mailbox(dev
);
600 return PTR_ERR(mailbox
);
601 inbox
= mailbox
->buf
;
604 chunk
= min_t(int, MLX4_MAILBOX_SIZE
/ sizeof(u64
) - 2,
606 inbox
[0] = cpu_to_be64(mtt
->offset
+ start_index
);
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
);
613 mlx4_free_cmd_mailbox(dev
, mailbox
);
618 start_index
+= chunk
;
621 mlx4_free_cmd_mailbox(dev
, mailbox
);
625 return __mlx4_write_mtt(dev
, mtt
, start_index
, npages
, page_list
);
627 EXPORT_SYMBOL_GPL(mlx4_write_mtt
);
629 int mlx4_buf_write_mtt(struct mlx4_dev
*dev
, struct mlx4_mtt
*mtt
,
630 struct mlx4_buf
*buf
)
636 page_list
= kmalloc(buf
->npages
* sizeof *page_list
, GFP_KERNEL
);
640 for (i
= 0; i
< buf
->npages
; ++i
)
642 page_list
[i
] = buf
->direct
.map
+ (i
<< buf
->page_shift
);
644 page_list
[i
] = buf
->page_list
[i
].map
;
646 err
= mlx4_write_mtt(dev
, mtt
, 0, buf
->npages
, page_list
);
651 EXPORT_SYMBOL_GPL(mlx4_buf_write_mtt
);
653 int mlx4_mw_alloc(struct mlx4_dev
*dev
, u32 pd
, enum mlx4_mw_type type
,
658 if ((type
== MLX4_MW_TYPE_1
&&
659 !(dev
->caps
.flags
& MLX4_DEV_CAP_FLAG_MEM_WINDOW
)) ||
660 (type
== MLX4_MW_TYPE_2
&&
661 !(dev
->caps
.bmme_flags
& MLX4_BMME_FLAG_TYPE_2_WIN
)))
664 index
= mlx4_mpt_reserve(dev
);
668 mw
->key
= hw_index_to_key(index
);
671 mw
->enabled
= MLX4_MPT_DISABLED
;
675 EXPORT_SYMBOL_GPL(mlx4_mw_alloc
);
677 int mlx4_mw_enable(struct mlx4_dev
*dev
, struct mlx4_mw
*mw
)
679 struct mlx4_cmd_mailbox
*mailbox
;
680 struct mlx4_mpt_entry
*mpt_entry
;
683 err
= mlx4_mpt_alloc_icm(dev
, key_to_hw_index(mw
->key
));
687 mailbox
= mlx4_alloc_cmd_mailbox(dev
);
688 if (IS_ERR(mailbox
)) {
689 err
= PTR_ERR(mailbox
);
692 mpt_entry
= mailbox
->buf
;
694 /* Note that the MLX4_MPT_FLAG_REGION bit in mpt_entry->flags is turned
695 * off, thus creating a memory window and not a memory region.
697 mpt_entry
->key
= cpu_to_be32(key_to_hw_index(mw
->key
));
698 mpt_entry
->pd_flags
= cpu_to_be32(mw
->pd
);
699 if (mw
->type
== MLX4_MW_TYPE_2
) {
700 mpt_entry
->flags
|= cpu_to_be32(MLX4_MPT_FLAG_FREE
);
701 mpt_entry
->qpn
= cpu_to_be32(MLX4_MPT_QP_FLAG_BOUND_QP
);
702 mpt_entry
->pd_flags
|= cpu_to_be32(MLX4_MPT_PD_FLAG_EN_INV
);
705 err
= mlx4_SW2HW_MPT(dev
, mailbox
,
706 key_to_hw_index(mw
->key
) &
707 (dev
->caps
.num_mpts
- 1));
709 mlx4_warn(dev
, "SW2HW_MPT failed (%d)\n", err
);
712 mw
->enabled
= MLX4_MPT_EN_HW
;
714 mlx4_free_cmd_mailbox(dev
, mailbox
);
719 mlx4_free_cmd_mailbox(dev
, mailbox
);
722 mlx4_mpt_free_icm(dev
, key_to_hw_index(mw
->key
));
725 EXPORT_SYMBOL_GPL(mlx4_mw_enable
);
727 void mlx4_mw_free(struct mlx4_dev
*dev
, struct mlx4_mw
*mw
)
731 if (mw
->enabled
== MLX4_MPT_EN_HW
) {
732 err
= mlx4_HW2SW_MPT(dev
, NULL
,
733 key_to_hw_index(mw
->key
) &
734 (dev
->caps
.num_mpts
- 1));
736 mlx4_warn(dev
, "xxx HW2SW_MPT failed (%d)\n", err
);
738 mw
->enabled
= MLX4_MPT_EN_SW
;
741 mlx4_mpt_free_icm(dev
, key_to_hw_index(mw
->key
));
742 mlx4_mpt_release(dev
, key_to_hw_index(mw
->key
));
744 EXPORT_SYMBOL_GPL(mlx4_mw_free
);
746 int mlx4_init_mr_table(struct mlx4_dev
*dev
)
748 struct mlx4_priv
*priv
= mlx4_priv(dev
);
749 struct mlx4_mr_table
*mr_table
= &priv
->mr_table
;
752 /* Nothing to do for slaves - all MR handling is forwarded
754 if (mlx4_is_slave(dev
))
757 if (!is_power_of_2(dev
->caps
.num_mpts
))
760 err
= mlx4_bitmap_init(&mr_table
->mpt_bitmap
, dev
->caps
.num_mpts
,
761 ~0, dev
->caps
.reserved_mrws
, 0);
765 err
= mlx4_buddy_init(&mr_table
->mtt_buddy
,
766 ilog2((u32
)dev
->caps
.num_mtts
/
767 (1 << log_mtts_per_seg
)));
771 if (dev
->caps
.reserved_mtts
) {
772 priv
->reserved_mtts
=
773 mlx4_alloc_mtt_range(dev
,
774 fls(dev
->caps
.reserved_mtts
- 1));
775 if (priv
->reserved_mtts
< 0) {
776 mlx4_warn(dev
, "MTT table of order %u is too small.\n",
777 mr_table
->mtt_buddy
.max_order
);
779 goto err_reserve_mtts
;
786 mlx4_buddy_cleanup(&mr_table
->mtt_buddy
);
789 mlx4_bitmap_cleanup(&mr_table
->mpt_bitmap
);
794 void mlx4_cleanup_mr_table(struct mlx4_dev
*dev
)
796 struct mlx4_priv
*priv
= mlx4_priv(dev
);
797 struct mlx4_mr_table
*mr_table
= &priv
->mr_table
;
799 if (mlx4_is_slave(dev
))
801 if (priv
->reserved_mtts
>= 0)
802 mlx4_free_mtt_range(dev
, priv
->reserved_mtts
,
803 fls(dev
->caps
.reserved_mtts
- 1));
804 mlx4_buddy_cleanup(&mr_table
->mtt_buddy
);
805 mlx4_bitmap_cleanup(&mr_table
->mpt_bitmap
);
808 static inline int mlx4_check_fmr(struct mlx4_fmr
*fmr
, u64
*page_list
,
809 int npages
, u64 iova
)
813 if (npages
> fmr
->max_pages
)
816 page_mask
= (1 << fmr
->page_shift
) - 1;
818 /* We are getting page lists, so va must be page aligned. */
819 if (iova
& page_mask
)
822 /* Trust the user not to pass misaligned data in page_list */
824 for (i
= 0; i
< npages
; ++i
) {
825 if (page_list
[i
] & ~page_mask
)
829 if (fmr
->maps
>= fmr
->max_maps
)
835 int mlx4_map_phys_fmr(struct mlx4_dev
*dev
, struct mlx4_fmr
*fmr
, u64
*page_list
,
836 int npages
, u64 iova
, u32
*lkey
, u32
*rkey
)
841 err
= mlx4_check_fmr(fmr
, page_list
, npages
, iova
);
847 key
= key_to_hw_index(fmr
->mr
.key
);
848 key
+= dev
->caps
.num_mpts
;
849 *lkey
= *rkey
= fmr
->mr
.key
= hw_index_to_key(key
);
851 *(u8
*) fmr
->mpt
= MLX4_MPT_STATUS_SW
;
853 /* Make sure MPT status is visible before writing MTT entries */
856 dma_sync_single_for_cpu(&dev
->pdev
->dev
, fmr
->dma_handle
,
857 npages
* sizeof(u64
), DMA_TO_DEVICE
);
859 for (i
= 0; i
< npages
; ++i
)
860 fmr
->mtts
[i
] = cpu_to_be64(page_list
[i
] | MLX4_MTT_FLAG_PRESENT
);
862 dma_sync_single_for_device(&dev
->pdev
->dev
, fmr
->dma_handle
,
863 npages
* sizeof(u64
), DMA_TO_DEVICE
);
865 fmr
->mpt
->key
= cpu_to_be32(key
);
866 fmr
->mpt
->lkey
= cpu_to_be32(key
);
867 fmr
->mpt
->length
= cpu_to_be64(npages
* (1ull << fmr
->page_shift
));
868 fmr
->mpt
->start
= cpu_to_be64(iova
);
870 /* Make MTT entries are visible before setting MPT status */
873 *(u8
*) fmr
->mpt
= MLX4_MPT_STATUS_HW
;
875 /* Make sure MPT status is visible before consumer can use FMR */
880 EXPORT_SYMBOL_GPL(mlx4_map_phys_fmr
);
882 int mlx4_fmr_alloc(struct mlx4_dev
*dev
, u32 pd
, u32 access
, int max_pages
,
883 int max_maps
, u8 page_shift
, struct mlx4_fmr
*fmr
)
885 struct mlx4_priv
*priv
= mlx4_priv(dev
);
888 if (max_maps
> dev
->caps
.max_fmr_maps
)
891 if (page_shift
< (ffs(dev
->caps
.page_size_cap
) - 1) || page_shift
>= 32)
894 /* All MTTs must fit in the same page */
895 if (max_pages
* sizeof *fmr
->mtts
> PAGE_SIZE
)
898 fmr
->page_shift
= page_shift
;
899 fmr
->max_pages
= max_pages
;
900 fmr
->max_maps
= max_maps
;
903 err
= mlx4_mr_alloc(dev
, pd
, 0, 0, access
, max_pages
,
904 page_shift
, &fmr
->mr
);
908 fmr
->mtts
= mlx4_table_find(&priv
->mr_table
.mtt_table
,
920 (void) mlx4_mr_free(dev
, &fmr
->mr
);
923 EXPORT_SYMBOL_GPL(mlx4_fmr_alloc
);
925 int mlx4_fmr_enable(struct mlx4_dev
*dev
, struct mlx4_fmr
*fmr
)
927 struct mlx4_priv
*priv
= mlx4_priv(dev
);
930 err
= mlx4_mr_enable(dev
, &fmr
->mr
);
934 fmr
->mpt
= mlx4_table_find(&priv
->mr_table
.dmpt_table
,
935 key_to_hw_index(fmr
->mr
.key
), NULL
);
941 EXPORT_SYMBOL_GPL(mlx4_fmr_enable
);
943 void mlx4_fmr_unmap(struct mlx4_dev
*dev
, struct mlx4_fmr
*fmr
,
944 u32
*lkey
, u32
*rkey
)
946 struct mlx4_cmd_mailbox
*mailbox
;
954 mailbox
= mlx4_alloc_cmd_mailbox(dev
);
955 if (IS_ERR(mailbox
)) {
956 err
= PTR_ERR(mailbox
);
957 printk(KERN_WARNING
"mlx4_ib: mlx4_alloc_cmd_mailbox"
958 " failed (%d)\n", err
);
962 err
= mlx4_HW2SW_MPT(dev
, NULL
,
963 key_to_hw_index(fmr
->mr
.key
) &
964 (dev
->caps
.num_mpts
- 1));
965 mlx4_free_cmd_mailbox(dev
, mailbox
);
967 printk(KERN_WARNING
"mlx4_ib: mlx4_HW2SW_MPT failed (%d)\n",
971 fmr
->mr
.enabled
= MLX4_MPT_EN_SW
;
973 EXPORT_SYMBOL_GPL(mlx4_fmr_unmap
);
975 int mlx4_fmr_free(struct mlx4_dev
*dev
, struct mlx4_fmr
*fmr
)
982 ret
= mlx4_mr_free(dev
, &fmr
->mr
);
985 fmr
->mr
.enabled
= MLX4_MPT_DISABLED
;
989 EXPORT_SYMBOL_GPL(mlx4_fmr_free
);
991 int mlx4_SYNC_TPT(struct mlx4_dev
*dev
)
993 return mlx4_cmd(dev
, 0, 0, 0, MLX4_CMD_SYNC_TPT
, 1000,
996 EXPORT_SYMBOL_GPL(mlx4_SYNC_TPT
);