2 * Copyright (c) 2004 Topspin Communications. 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 * $Id: mthca_mr.c 1349 2004-12-16 21:09:43Z roland $
35 #include <linux/slab.h>
36 #include <linux/init.h>
37 #include <linux/errno.h>
39 #include "mthca_dev.h"
40 #include "mthca_cmd.h"
43 * Must be packed because mtt_seg is 64 bits but only aligned to 32 bits.
45 struct mthca_mpt_entry {
54 u32 window_count_limit;
57 } __attribute__((packed));
59 #define MTHCA_MPT_FLAG_SW_OWNS (0xfUL << 28)
60 #define MTHCA_MPT_FLAG_MIO (1 << 17)
61 #define MTHCA_MPT_FLAG_BIND_ENABLE (1 << 15)
62 #define MTHCA_MPT_FLAG_PHYSICAL (1 << 9)
63 #define MTHCA_MPT_FLAG_REGION (1 << 8)
65 #define MTHCA_MTT_FLAG_PRESENT 1
68 * Buddy allocator for MTT segments (currently not very efficient
69 * since it doesn't keep a free list and just searches linearly
70 * through the bitmaps)
73 static u32 mthca_alloc_mtt(struct mthca_dev *dev, int order)
79 spin_lock(&dev->mr_table.mpt_alloc.lock);
81 for (o = order; o <= dev->mr_table.max_mtt_order; ++o) {
82 m = 1 << (dev->mr_table.max_mtt_order - o);
83 seg = find_first_bit(dev->mr_table.mtt_buddy[o], m);
88 spin_unlock(&dev->mr_table.mpt_alloc.lock);
92 clear_bit(seg, dev->mr_table.mtt_buddy[o]);
97 set_bit(seg ^ 1, dev->mr_table.mtt_buddy[o]);
100 spin_unlock(&dev->mr_table.mpt_alloc.lock);
107 static void mthca_free_mtt(struct mthca_dev *dev, u32 seg, int order)
111 spin_lock(&dev->mr_table.mpt_alloc.lock);
113 while (test_bit(seg ^ 1, dev->mr_table.mtt_buddy[order])) {
114 clear_bit(seg ^ 1, dev->mr_table.mtt_buddy[order]);
119 set_bit(seg, dev->mr_table.mtt_buddy[order]);
121 spin_unlock(&dev->mr_table.mpt_alloc.lock);
124 int mthca_mr_alloc_notrans(struct mthca_dev *dev, u32 pd,
125 u32 access, struct mthca_mr *mr)
128 struct mthca_mpt_entry *mpt_entry;
135 mr->ibmr.lkey = mthca_alloc(&dev->mr_table.mpt_alloc);
136 if (mr->ibmr.lkey == -1)
138 mr->ibmr.rkey = mr->ibmr.lkey;
140 mailbox = kmalloc(sizeof *mpt_entry + MTHCA_CMD_MAILBOX_EXTRA,
143 mthca_free(&dev->mr_table.mpt_alloc, mr->ibmr.lkey);
146 mpt_entry = MAILBOX_ALIGN(mailbox);
148 mpt_entry->flags = cpu_to_be32(MTHCA_MPT_FLAG_SW_OWNS |
150 MTHCA_MPT_FLAG_PHYSICAL |
151 MTHCA_MPT_FLAG_REGION |
153 mpt_entry->page_size = 0;
154 mpt_entry->key = cpu_to_be32(mr->ibmr.lkey);
155 mpt_entry->pd = cpu_to_be32(pd);
156 mpt_entry->start = 0;
157 mpt_entry->length = ~0ULL;
159 memset(&mpt_entry->lkey, 0,
160 sizeof *mpt_entry - offsetof(struct mthca_mpt_entry, lkey));
162 err = mthca_SW2HW_MPT(dev, mpt_entry,
163 mr->ibmr.lkey & (dev->limits.num_mpts - 1),
166 mthca_warn(dev, "SW2HW_MPT failed (%d)\n", err);
168 mthca_warn(dev, "SW2HW_MPT returned status 0x%02x\n",
177 int mthca_mr_alloc_phys(struct mthca_dev *dev, u32 pd,
178 u64 *buffer_list, int buffer_size_shift,
179 int list_len, u64 iova, u64 total_size,
180 u32 access, struct mthca_mr *mr)
184 struct mthca_mpt_entry *mpt_entry;
190 WARN_ON(buffer_size_shift >= 32);
192 mr->ibmr.lkey = mthca_alloc(&dev->mr_table.mpt_alloc);
193 if (mr->ibmr.lkey == -1)
195 mr->ibmr.rkey = mr->ibmr.lkey;
197 for (i = dev->limits.mtt_seg_size / 8, mr->order = 0;
199 i <<= 1, ++mr->order)
202 mr->first_seg = mthca_alloc_mtt(dev, mr->order);
203 if (mr->first_seg == -1)
204 goto err_out_mpt_free;
207 * If list_len is odd, we add one more dummy entry for
208 * firmware efficiency.
210 mailbox = kmalloc(max(sizeof *mpt_entry,
211 (size_t) 8 * (list_len + (list_len & 1) + 2)) +
212 MTHCA_CMD_MAILBOX_EXTRA,
215 goto err_out_free_mtt;
217 mtt_entry = MAILBOX_ALIGN(mailbox);
219 mtt_entry[0] = cpu_to_be64(dev->mr_table.mtt_base +
220 mr->first_seg * dev->limits.mtt_seg_size);
222 for (i = 0; i < list_len; ++i)
223 mtt_entry[i + 2] = cpu_to_be64(buffer_list[i] |
224 MTHCA_MTT_FLAG_PRESENT);
226 mtt_entry[i + 2] = 0;
231 mthca_dbg(dev, "Dumping MPT entry\n");
232 for (i = 0; i < list_len + 2; ++i)
233 printk(KERN_ERR "[%2d] %016llx\n",
234 i, (unsigned long long) be64_to_cpu(mtt_entry[i]));
237 err = mthca_WRITE_MTT(dev, mtt_entry, list_len, &status);
239 mthca_warn(dev, "WRITE_MTT failed (%d)\n", err);
240 goto err_out_mailbox_free;
243 mthca_warn(dev, "WRITE_MTT returned status 0x%02x\n",
246 goto err_out_mailbox_free;
249 mpt_entry = MAILBOX_ALIGN(mailbox);
251 mpt_entry->flags = cpu_to_be32(MTHCA_MPT_FLAG_SW_OWNS |
253 MTHCA_MPT_FLAG_REGION |
256 mpt_entry->page_size = cpu_to_be32(buffer_size_shift - 12);
257 mpt_entry->key = cpu_to_be32(mr->ibmr.lkey);
258 mpt_entry->pd = cpu_to_be32(pd);
259 mpt_entry->start = cpu_to_be64(iova);
260 mpt_entry->length = cpu_to_be64(total_size);
261 memset(&mpt_entry->lkey, 0,
262 sizeof *mpt_entry - offsetof(struct mthca_mpt_entry, lkey));
263 mpt_entry->mtt_seg = cpu_to_be64(dev->mr_table.mtt_base +
264 mr->first_seg * dev->limits.mtt_seg_size);
267 mthca_dbg(dev, "Dumping MPT entry %08x:\n", mr->ibmr.lkey);
268 for (i = 0; i < sizeof (struct mthca_mpt_entry) / 4; ++i) {
270 printk("[%02x] ", i * 4);
271 printk(" %08x", be32_to_cpu(((u32 *) mpt_entry)[i]));
272 if ((i + 1) % 4 == 0)
277 err = mthca_SW2HW_MPT(dev, mpt_entry,
278 mr->ibmr.lkey & (dev->limits.num_mpts - 1),
281 mthca_warn(dev, "SW2HW_MPT failed (%d)\n", err);
283 mthca_warn(dev, "SW2HW_MPT returned status 0x%02x\n",
291 err_out_mailbox_free:
295 mthca_free_mtt(dev, mr->first_seg, mr->order);
298 mthca_free(&dev->mr_table.mpt_alloc, mr->ibmr.lkey);
302 void mthca_free_mr(struct mthca_dev *dev, struct mthca_mr *mr)
309 err = mthca_HW2SW_MPT(dev, NULL,
310 mr->ibmr.lkey & (dev->limits.num_mpts - 1),
313 mthca_warn(dev, "HW2SW_MPT failed (%d)\n", err);
315 mthca_warn(dev, "HW2SW_MPT returned status 0x%02x\n",
319 mthca_free_mtt(dev, mr->first_seg, mr->order);
321 mthca_free(&dev->mr_table.mpt_alloc, mr->ibmr.lkey);
324 int __devinit mthca_init_mr_table(struct mthca_dev *dev)
329 err = mthca_alloc_init(&dev->mr_table.mpt_alloc,
330 dev->limits.num_mpts,
331 ~0, dev->limits.reserved_mrws);
337 for (i = 1, dev->mr_table.max_mtt_order = 0;
338 i < dev->limits.num_mtt_segs;
339 i <<= 1, ++dev->mr_table.max_mtt_order)
342 dev->mr_table.mtt_buddy = kmalloc((dev->mr_table.max_mtt_order + 1) *
345 if (!dev->mr_table.mtt_buddy)
348 for (i = 0; i <= dev->mr_table.max_mtt_order; ++i)
349 dev->mr_table.mtt_buddy[i] = NULL;
351 for (i = 0; i <= dev->mr_table.max_mtt_order; ++i) {
352 s = BITS_TO_LONGS(1 << (dev->mr_table.max_mtt_order - i));
353 dev->mr_table.mtt_buddy[i] = kmalloc(s * sizeof (long),
355 if (!dev->mr_table.mtt_buddy[i])
357 bitmap_zero(dev->mr_table.mtt_buddy[i],
358 1 << (dev->mr_table.max_mtt_order - i));
361 set_bit(0, dev->mr_table.mtt_buddy[dev->mr_table.max_mtt_order]);
363 for (i = 0; i < dev->mr_table.max_mtt_order; ++i)
364 if (1 << i >= dev->limits.reserved_mtts)
367 if (i == dev->mr_table.max_mtt_order) {
368 mthca_err(dev, "MTT table of order %d is "
373 (void) mthca_alloc_mtt(dev, i);
378 for (i = 0; i <= dev->mr_table.max_mtt_order; ++i)
379 kfree(dev->mr_table.mtt_buddy[i]);
382 mthca_alloc_cleanup(&dev->mr_table.mpt_alloc);
387 void __devexit mthca_cleanup_mr_table(struct mthca_dev *dev)
391 /* XXX check if any MRs are still allocated? */
392 for (i = 0; i <= dev->mr_table.max_mtt_order; ++i)
393 kfree(dev->mr_table.mtt_buddy[i]);
394 kfree(dev->mr_table.mtt_buddy);
395 mthca_alloc_cleanup(&dev->mr_table.mpt_alloc);