2 * Copyright (c) 2006 Chelsio, Inc. All rights reserved.
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 #include <linux/slab.h>
33 #include <asm/byteorder.h>
35 #include <rdma/iw_cm.h>
36 #include <rdma/ib_verbs.h>
39 #include "cxio_resource.h"
41 #include "iwch_provider.h"
43 static int iwch_finish_mem_reg(struct iwch_mr *mhp, u32 stag)
48 mhp->attr.stag = stag;
50 mhp->ibmr.rkey = mhp->ibmr.lkey = stag;
51 PDBG("%s mmid 0x%x mhp %p\n", __func__, mmid, mhp);
52 return insert_handle(mhp->rhp, &mhp->rhp->mmidr, mhp, mmid);
55 int iwch_register_mem(struct iwch_dev *rhp, struct iwch_pd *php,
56 struct iwch_mr *mhp, int shift)
61 if (cxio_register_phys_mem(&rhp->rdev,
62 &stag, mhp->attr.pdid,
68 mhp->attr.pbl_size, mhp->attr.pbl_addr))
71 ret = iwch_finish_mem_reg(mhp, stag);
73 cxio_dereg_mem(&rhp->rdev, mhp->attr.stag, mhp->attr.pbl_size,
78 int iwch_reregister_mem(struct iwch_dev *rhp, struct iwch_pd *php,
86 /* We could support this... */
87 if (npages > mhp->attr.pbl_size)
90 stag = mhp->attr.stag;
91 if (cxio_reregister_phys_mem(&rhp->rdev,
92 &stag, mhp->attr.pdid,
98 mhp->attr.pbl_size, mhp->attr.pbl_addr))
101 ret = iwch_finish_mem_reg(mhp, stag);
103 cxio_dereg_mem(&rhp->rdev, mhp->attr.stag, mhp->attr.pbl_size,
109 int iwch_alloc_pbl(struct iwch_mr *mhp, int npages)
111 mhp->attr.pbl_addr = cxio_hal_pblpool_alloc(&mhp->rhp->rdev,
114 if (!mhp->attr.pbl_addr)
117 mhp->attr.pbl_size = npages;
122 void iwch_free_pbl(struct iwch_mr *mhp)
124 cxio_hal_pblpool_free(&mhp->rhp->rdev, mhp->attr.pbl_addr,
125 mhp->attr.pbl_size << 3);
128 int iwch_write_pbl(struct iwch_mr *mhp, __be64 *pages, int npages, int offset)
130 return cxio_write_pbl(&mhp->rhp->rdev, pages,
131 mhp->attr.pbl_addr + (offset << 3), npages);
134 int build_phys_page_list(struct ib_phys_buf *buffer_list,
147 for (i = 0; i < num_phys_buf; ++i) {
148 if (i != 0 && buffer_list[i].addr & ~PAGE_MASK)
150 if (i != 0 && i != num_phys_buf - 1 &&
151 (buffer_list[i].size & ~PAGE_MASK))
153 *total_size += buffer_list[i].size;
155 mask |= buffer_list[i].addr;
157 mask |= buffer_list[i].addr & PAGE_MASK;
158 if (i != num_phys_buf - 1)
159 mask |= buffer_list[i].addr + buffer_list[i].size;
161 mask |= (buffer_list[i].addr + buffer_list[i].size +
162 PAGE_SIZE - 1) & PAGE_MASK;
165 if (*total_size > 0xFFFFFFFFULL)
168 /* Find largest page shift we can use to cover buffers */
169 for (*shift = PAGE_SHIFT; *shift < 27; ++(*shift))
170 if ((1ULL << *shift) & mask)
173 buffer_list[0].size += buffer_list[0].addr & ((1ULL << *shift) - 1);
174 buffer_list[0].addr &= ~0ull << *shift;
177 for (i = 0; i < num_phys_buf; ++i)
178 *npages += (buffer_list[i].size +
179 (1ULL << *shift) - 1) >> *shift;
184 *page_list = kmalloc(sizeof(u64) * *npages, GFP_KERNEL);
189 for (i = 0; i < num_phys_buf; ++i)
191 j < (buffer_list[i].size + (1ULL << *shift) - 1) >> *shift;
193 (*page_list)[n++] = cpu_to_be64(buffer_list[i].addr +
194 ((u64) j << *shift));
196 PDBG("%s va 0x%llx mask 0x%llx shift %d len %lld pbl_size %d\n",
197 __func__, (unsigned long long) *iova_start,
198 (unsigned long long) mask, *shift, (unsigned long long) *total_size,