summaryrefslogtreecommitdiffstats
path: root/kernel/drivers/infiniband/hw/cxgb3/iwch_mem.c
blob: 5c36ee2809acf52f8f212483dfb81e5649357baf (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
/*
 * Copyright (c) 2006 Chelsio, Inc. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
#include <linux/slab.h>
#include <asm/byteorder.h>

#include <rdma/iw_cm.h>
#include <rdma/ib_verbs.h>

#include "cxio_hal.h"
#include "cxio_resource.h"
#include "iwch.h"
#include "iwch_provider.h"

static int iwch_finish_mem_reg(struct iwch_mr *mhp, u32 stag)
{
	u32 mmid;

	mhp->attr.state = 1;
	mhp->attr.stag = stag;
	mmid = stag >> 8;
	mhp->ibmr.rkey = mhp->ibmr.lkey = stag;
	PDBG("%s mmid 0x%x mhp %p\n", __func__, mmid, mhp);
	return insert_handle(mhp->rhp, &mhp->rhp->mmidr, mhp, mmid);
}

int iwch_register_mem(struct iwch_dev *rhp, struct iwch_pd *php,
		      struct iwch_mr *mhp, int shift)
{
	u32 stag;
	int ret;

	if (cxio_register_phys_mem(&rhp->rdev,
				   &stag, mhp->attr.pdid,
				   mhp->attr.perms,
				   mhp->attr.zbva,
				   mhp->attr.va_fbo,
				   mhp->attr.len,
				   shift - 12,
				   mhp->attr.pbl_size, mhp->attr.pbl_addr))
		return -ENOMEM;

	ret = iwch_finish_mem_reg(mhp, stag);
	if (ret)
		cxio_dereg_mem(&rhp->rdev, mhp->attr.stag, mhp->attr.pbl_size,
		       mhp->attr.pbl_addr);
	return ret;
}

int iwch_reregister_mem(struct iwch_dev *rhp, struct iwch_pd *php,
					struct iwch_mr *mhp,
					int shift,
					int npages)
{
	u32 stag;
	int ret;

	/* We could support this... */
	if (npages > mhp->attr.pbl_size)
		return -ENOMEM;

	stag = mhp->attr.stag;
	if (cxio_reregister_phys_mem(&rhp->rdev,
				   &stag, mhp->attr.pdid,
				   mhp->attr.perms,
				   mhp->attr.zbva,
				   mhp->attr.va_fbo,
				   mhp->attr.len,
				   shift - 12,
				   mhp->attr.pbl_size, mhp->attr.pbl_addr))
		return -ENOMEM;

	ret = iwch_finish_mem_reg(mhp, stag);
	if (ret)
		cxio_dereg_mem(&rhp->rdev, mhp->attr.stag, mhp->attr.pbl_size,
		       mhp->attr.pbl_addr);

	return ret;
}

int iwch_alloc_pbl(struct iwch_mr *mhp, int npages)
{
	mhp->attr.pbl_addr = cxio_hal_pblpool_alloc(&mhp->rhp->rdev,
						    npages << 3);

	if (!mhp->attr.pbl_addr)
		return -ENOMEM;

	mhp->attr.pbl_size = npages;

	return 0;
}

void iwch_free_pbl(struct iwch_mr *mhp)
{
	cxio_hal_pblpool_free(&mhp->rhp->rdev, mhp->attr.pbl_addr,
			      mhp->attr.pbl_size << 3);
}

int iwch_write_pbl(struct iwch_mr *mhp, __be64 *pages, int npages, int offset)
{
	return cxio_write_pbl(&mhp->rhp->rdev, pages,
			      mhp->attr.pbl_addr + (offset << 3), npages);
}

int build_phys_page_list(struct ib_phys_buf *buffer_list,
					int num_phys_buf,
					u64 *iova_start,
					u64 *total_size,
					int *npages,
					int *shift,
					__be64 **page_list)
{
	u64 mask;
	int i, j, n;

	mask = 0;
	*total_size = 0;
	for (i = 0; i < num_phys_buf; ++i) {
		if (i != 0 && buffer_list[i].addr & ~PAGE_MASK)
			return -EINVAL;
		if (i != 0 && i != num_phys_buf - 1 &&
		    (buffer_list[i].size & ~PAGE_MASK))
			return -EINVAL;
		*total_size += buffer_list[i].size;
		if (i > 0)
			mask |= buffer_list[i].addr;
		else
			mask |= buffer_list[i].addr & PAGE_MASK;
		if (i != num_phys_buf - 1)
			mask |= buffer_list[i].addr + buffer_list[i].size;
		else
			mask |= (buffer_list[i].addr + buffer_list[i].size +
				PAGE_SIZE - 1) & PAGE_MASK;
	}

	if (*total_size > 0xFFFFFFFFULL)
		return -ENOMEM;

	/* Find largest page shift we can use to cover buffers */
	for (*shift = PAGE_SHIFT; *shift < 27; ++(*shift))
		if ((1ULL << *shift) & mask)
			break;

	buffer_list[0].size += buffer_list[0].addr & ((1ULL << *shift) - 1);
	buffer_list[0].addr &= ~0ull << *shift;

	*npages = 0;
	for (i = 0; i < num_phys_buf; ++i)
		*npages += (buffer_list[i].size +
			(1ULL << *shift) - 1) >> *shift;

	if (!*npages)
		return -EINVAL;

	*page_list = kmalloc(sizeof(u64) * *npages, GFP_KERNEL);
	if (!*page_list)
		return -ENOMEM;

	n = 0;
	for (i = 0; i < num_phys_buf; ++i)
		for (j = 0;
		     j < (buffer_list[i].size + (1ULL << *shift) - 1) >> *shift;
		     ++j)
			(*page_list)[n++] = cpu_to_be64(buffer_list[i].addr +
			    ((u64) j << *shift));

	PDBG("%s va 0x%llx mask 0x%llx shift %d len %lld pbl_size %d\n",
	     __func__, (unsigned long long) *iova_start,
	     (unsigned long long) mask, *shift, (unsigned long long) *total_size,
	     *npages);

	return 0;

}