2 * Copyright (c) 2006 QLogic, Inc. All rights reserved.
3 * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
34 #include <rdma/ib_pack.h>
35 #include <rdma/ib_smi.h>
37 #include "ipath_verbs.h"
39 /* Fast memory region */
43 struct ipath_mregion mr; /* must be last */
46 static inline struct ipath_fmr *to_ifmr(struct ib_fmr *ibfmr)
48 return container_of(ibfmr, struct ipath_fmr, ibfmr);
52 * ipath_get_dma_mr - get a DMA memory region
53 * @pd: protection domain for this memory region
56 * Returns the memory region on success, otherwise returns an errno.
57 * Note that all DMA addresses should be created via the
58 * struct ib_dma_mapping_ops functions (see ipath_dma.c).
60 struct ib_mr *ipath_get_dma_mr(struct ib_pd *pd, int acc)
65 mr = kzalloc(sizeof *mr, GFP_KERNEL);
67 ret = ERR_PTR(-ENOMEM);
71 mr->mr.access_flags = acc;
78 static struct ipath_mr *alloc_mr(int count,
79 struct ipath_lkey_table *lk_table)
84 /* Allocate struct plus pointers to first level page tables. */
85 m = (count + IPATH_SEGSZ - 1) / IPATH_SEGSZ;
86 mr = kmalloc(sizeof *mr + m * sizeof mr->mr.map[0], GFP_KERNEL);
90 /* Allocate first level page tables. */
92 mr->mr.map[i] = kmalloc(sizeof *mr->mr.map[0], GFP_KERNEL);
99 * ib_reg_phys_mr() will initialize mr->ibmr except for
102 if (!ipath_alloc_lkey(lk_table, &mr->mr))
104 mr->ibmr.rkey = mr->ibmr.lkey = mr->mr.lkey;
111 kfree(mr->mr.map[i]);
121 * ipath_reg_phys_mr - register a physical memory region
122 * @pd: protection domain for this memory region
123 * @buffer_list: pointer to the list of physical buffers to register
124 * @num_phys_buf: the number of physical buffers to register
125 * @iova_start: the starting address passed over IB which maps to this MR
127 * Returns the memory region on success, otherwise returns an errno.
129 struct ib_mr *ipath_reg_phys_mr(struct ib_pd *pd,
130 struct ib_phys_buf *buffer_list,
131 int num_phys_buf, int acc, u64 *iova_start)
137 mr = alloc_mr(num_phys_buf, &to_idev(pd->device)->lk_table);
139 ret = ERR_PTR(-ENOMEM);
144 mr->mr.user_base = *iova_start;
145 mr->mr.iova = *iova_start;
148 mr->mr.access_flags = acc;
149 mr->mr.max_segs = num_phys_buf;
153 for (i = 0; i < num_phys_buf; i++) {
154 mr->mr.map[m]->segs[n].vaddr = (void *) buffer_list[i].addr;
155 mr->mr.map[m]->segs[n].length = buffer_list[i].size;
156 mr->mr.length += buffer_list[i].size;
158 if (n == IPATH_SEGSZ) {
171 * ipath_reg_user_mr - register a userspace memory region
172 * @pd: protection domain for this memory region
173 * @region: the user memory region
174 * @mr_access_flags: access flags for this memory region
175 * @udata: unused by the InfiniPath driver
177 * Returns the memory region on success, otherwise returns an errno.
179 struct ib_mr *ipath_reg_user_mr(struct ib_pd *pd, struct ib_umem *region,
180 int mr_access_flags, struct ib_udata *udata)
183 struct ib_umem_chunk *chunk;
187 if (region->length == 0) {
188 ret = ERR_PTR(-EINVAL);
193 list_for_each_entry(chunk, ®ion->chunk_list, list)
196 mr = alloc_mr(n, &to_idev(pd->device)->lk_table);
198 ret = ERR_PTR(-ENOMEM);
203 mr->mr.user_base = region->user_base;
204 mr->mr.iova = region->virt_base;
205 mr->mr.length = region->length;
206 mr->mr.offset = region->offset;
207 mr->mr.access_flags = mr_access_flags;
212 list_for_each_entry(chunk, ®ion->chunk_list, list) {
213 for (i = 0; i < chunk->nents; i++) {
216 vaddr = page_address(chunk->page_list[i].page);
218 ret = ERR_PTR(-EINVAL);
221 mr->mr.map[m]->segs[n].vaddr = vaddr;
222 mr->mr.map[m]->segs[n].length = region->page_size;
224 if (n == IPATH_SEGSZ) {
237 * ipath_dereg_mr - unregister and free a memory region
238 * @ibmr: the memory region to free
240 * Returns 0 on success.
242 * Note that this is called to free MRs created by ipath_get_dma_mr()
243 * or ipath_reg_user_mr().
245 int ipath_dereg_mr(struct ib_mr *ibmr)
247 struct ipath_mr *mr = to_imr(ibmr);
250 ipath_free_lkey(&to_idev(ibmr->device)->lk_table, ibmr->lkey);
254 kfree(mr->mr.map[i]);
261 * ipath_alloc_fmr - allocate a fast memory region
262 * @pd: the protection domain for this memory region
263 * @mr_access_flags: access flags for this memory region
264 * @fmr_attr: fast memory region attributes
266 * Returns the memory region on success, otherwise returns an errno.
268 struct ib_fmr *ipath_alloc_fmr(struct ib_pd *pd, int mr_access_flags,
269 struct ib_fmr_attr *fmr_attr)
271 struct ipath_fmr *fmr;
275 /* Allocate struct plus pointers to first level page tables. */
276 m = (fmr_attr->max_pages + IPATH_SEGSZ - 1) / IPATH_SEGSZ;
277 fmr = kmalloc(sizeof *fmr + m * sizeof fmr->mr.map[0], GFP_KERNEL);
281 /* Allocate first level page tables. */
283 fmr->mr.map[i] = kmalloc(sizeof *fmr->mr.map[0],
291 * ib_alloc_fmr() will initialize fmr->ibfmr except for lkey &
294 if (!ipath_alloc_lkey(&to_idev(pd->device)->lk_table, &fmr->mr))
296 fmr->ibfmr.rkey = fmr->ibfmr.lkey = fmr->mr.lkey;
298 * Resources are allocated but no valid mapping (RKEY can't be
302 fmr->mr.user_base = 0;
306 fmr->mr.access_flags = mr_access_flags;
307 fmr->mr.max_segs = fmr_attr->max_pages;
308 fmr->page_shift = fmr_attr->page_shift;
315 kfree(fmr->mr.map[--i]);
317 ret = ERR_PTR(-ENOMEM);
324 * ipath_map_phys_fmr - set up a fast memory region
325 * @ibmfr: the fast memory region to set up
326 * @page_list: the list of pages to associate with the fast memory region
327 * @list_len: the number of pages to associate with the fast memory region
328 * @iova: the virtual address of the start of the fast memory region
330 * This may be called from interrupt context.
333 int ipath_map_phys_fmr(struct ib_fmr *ibfmr, u64 * page_list,
334 int list_len, u64 iova)
336 struct ipath_fmr *fmr = to_ifmr(ibfmr);
337 struct ipath_lkey_table *rkt;
343 if (list_len > fmr->mr.max_segs) {
347 rkt = &to_idev(ibfmr->device)->lk_table;
348 spin_lock_irqsave(&rkt->lock, flags);
349 fmr->mr.user_base = iova;
351 ps = 1 << fmr->page_shift;
352 fmr->mr.length = list_len * ps;
355 ps = 1 << fmr->page_shift;
356 for (i = 0; i < list_len; i++) {
357 fmr->mr.map[m]->segs[n].vaddr = (void *) page_list[i];
358 fmr->mr.map[m]->segs[n].length = ps;
359 if (++n == IPATH_SEGSZ) {
364 spin_unlock_irqrestore(&rkt->lock, flags);
372 * ipath_unmap_fmr - unmap fast memory regions
373 * @fmr_list: the list of fast memory regions to unmap
375 * Returns 0 on success.
377 int ipath_unmap_fmr(struct list_head *fmr_list)
379 struct ipath_fmr *fmr;
380 struct ipath_lkey_table *rkt;
383 list_for_each_entry(fmr, fmr_list, ibfmr.list) {
384 rkt = &to_idev(fmr->ibfmr.device)->lk_table;
385 spin_lock_irqsave(&rkt->lock, flags);
386 fmr->mr.user_base = 0;
389 spin_unlock_irqrestore(&rkt->lock, flags);
395 * ipath_dealloc_fmr - deallocate a fast memory region
396 * @ibfmr: the fast memory region to deallocate
398 * Returns 0 on success.
400 int ipath_dealloc_fmr(struct ib_fmr *ibfmr)
402 struct ipath_fmr *fmr = to_ifmr(ibfmr);
405 ipath_free_lkey(&to_idev(ibfmr->device)->lk_table, ibfmr->lkey);
408 kfree(fmr->mr.map[--i]);