1 /*
2 * Copyright (c) 2009-2010 Chelsio, Inc. All rights reserved.
3 *
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:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
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.
22 *
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
30 * SOFTWARE.
31 */
32
33 #include <rdma/ib_umem.h>
34 #include <linux/atomic.h>
35
36 #include "iw_cxgb4.h"
37
38 #define T4_ULPTX_MIN_IO 32
39 #define C4IW_MAX_INLINE_SIZE 96
40
write_adapter_mem(struct c4iw_rdev * rdev,u32 addr,u32 len,void * data)41 static int write_adapter_mem(struct c4iw_rdev *rdev, u32 addr, u32 len,
42 void *data)
43 {
44 struct sk_buff *skb;
45 struct ulp_mem_io *req;
46 struct ulptx_idata *sc;
47 u8 wr_len, *to_dp, *from_dp;
48 int copy_len, num_wqe, i, ret = 0;
49 struct c4iw_wr_wait wr_wait;
50
51 addr &= 0x7FFFFFF;
52 PDBG("%s addr 0x%x len %u\n", __func__, addr, len);
53 num_wqe = DIV_ROUND_UP(len, C4IW_MAX_INLINE_SIZE);
54 c4iw_init_wr_wait(&wr_wait);
55 for (i = 0; i < num_wqe; i++) {
56
57 copy_len = len > C4IW_MAX_INLINE_SIZE ? C4IW_MAX_INLINE_SIZE :
58 len;
59 wr_len = roundup(sizeof *req + sizeof *sc +
60 roundup(copy_len, T4_ULPTX_MIN_IO), 16);
61
62 skb = alloc_skb(wr_len, GFP_KERNEL);
63 if (!skb)
64 return -ENOMEM;
65 set_wr_txq(skb, CPL_PRIORITY_CONTROL, 0);
66
67 req = (struct ulp_mem_io *)__skb_put(skb, wr_len);
68 memset(req, 0, wr_len);
69 INIT_ULPTX_WR(req, wr_len, 0, 0);
70
71 if (i == (num_wqe-1)) {
72 req->wr.wr_hi = cpu_to_be32(FW_WR_OP(FW_ULPTX_WR) |
73 FW_WR_COMPL(1));
74 req->wr.wr_lo = (__force __be64)(unsigned long) &wr_wait;
75 } else
76 req->wr.wr_hi = cpu_to_be32(FW_WR_OP(FW_ULPTX_WR));
77 req->wr.wr_mid = cpu_to_be32(
78 FW_WR_LEN16(DIV_ROUND_UP(wr_len, 16)));
79
80 req->cmd = cpu_to_be32(ULPTX_CMD(ULP_TX_MEM_WRITE) | (1<<23));
81 req->dlen = cpu_to_be32(ULP_MEMIO_DATA_LEN(
82 DIV_ROUND_UP(copy_len, T4_ULPTX_MIN_IO)));
83 req->len16 = cpu_to_be32(DIV_ROUND_UP(wr_len-sizeof(req->wr),
84 16));
85 req->lock_addr = cpu_to_be32(ULP_MEMIO_ADDR(addr + i * 3));
86
87 sc = (struct ulptx_idata *)(req + 1);
88 sc->cmd_more = cpu_to_be32(ULPTX_CMD(ULP_TX_SC_IMM));
89 sc->len = cpu_to_be32(roundup(copy_len, T4_ULPTX_MIN_IO));
90
91 to_dp = (u8 *)(sc + 1);
92 from_dp = (u8 *)data + i * C4IW_MAX_INLINE_SIZE;
93 if (data)
94 memcpy(to_dp, from_dp, copy_len);
95 else
96 memset(to_dp, 0, copy_len);
97 if (copy_len % T4_ULPTX_MIN_IO)
98 memset(to_dp + copy_len, 0, T4_ULPTX_MIN_IO -
99 (copy_len % T4_ULPTX_MIN_IO));
100 ret = c4iw_ofld_send(rdev, skb);
101 if (ret)
102 return ret;
103 len -= C4IW_MAX_INLINE_SIZE;
104 }
105
106 ret = c4iw_wait_for_reply(rdev, &wr_wait, 0, 0, __func__);
107 return ret;
108 }
109
110 /*
111 * Build and write a TPT entry.
112 * IN: stag key, pdid, perm, bind_enabled, zbva, to, len, page_size,
113 * pbl_size and pbl_addr
114 * OUT: stag index
115 */
write_tpt_entry(struct c4iw_rdev * rdev,u32 reset_tpt_entry,u32 * stag,u8 stag_state,u32 pdid,enum fw_ri_stag_type type,enum fw_ri_mem_perms perm,int bind_enabled,u32 zbva,u64 to,u64 len,u8 page_size,u32 pbl_size,u32 pbl_addr)116 static int write_tpt_entry(struct c4iw_rdev *rdev, u32 reset_tpt_entry,
117 u32 *stag, u8 stag_state, u32 pdid,
118 enum fw_ri_stag_type type, enum fw_ri_mem_perms perm,
119 int bind_enabled, u32 zbva, u64 to,
120 u64 len, u8 page_size, u32 pbl_size, u32 pbl_addr)
121 {
122 int err;
123 struct fw_ri_tpte tpt;
124 u32 stag_idx;
125 static atomic_t key;
126
127 if (c4iw_fatal_error(rdev))
128 return -EIO;
129
130 stag_state = stag_state > 0;
131 stag_idx = (*stag) >> 8;
132
133 if ((!reset_tpt_entry) && (*stag == T4_STAG_UNSET)) {
134 stag_idx = c4iw_get_resource(&rdev->resource.tpt_fifo,
135 &rdev->resource.tpt_fifo_lock);
136 if (!stag_idx)
137 return -ENOMEM;
138 *stag = (stag_idx << 8) | (atomic_inc_return(&key) & 0xff);
139 }
140 PDBG("%s stag_state 0x%0x type 0x%0x pdid 0x%0x, stag_idx 0x%x\n",
141 __func__, stag_state, type, pdid, stag_idx);
142
143 /* write TPT entry */
144 if (reset_tpt_entry)
145 memset(&tpt, 0, sizeof(tpt));
146 else {
147 tpt.valid_to_pdid = cpu_to_be32(F_FW_RI_TPTE_VALID |
148 V_FW_RI_TPTE_STAGKEY((*stag & M_FW_RI_TPTE_STAGKEY)) |
149 V_FW_RI_TPTE_STAGSTATE(stag_state) |
150 V_FW_RI_TPTE_STAGTYPE(type) | V_FW_RI_TPTE_PDID(pdid));
151 tpt.locread_to_qpid = cpu_to_be32(V_FW_RI_TPTE_PERM(perm) |
152 (bind_enabled ? F_FW_RI_TPTE_MWBINDEN : 0) |
153 V_FW_RI_TPTE_ADDRTYPE((zbva ? FW_RI_ZERO_BASED_TO :
154 FW_RI_VA_BASED_TO))|
155 V_FW_RI_TPTE_PS(page_size));
156 tpt.nosnoop_pbladdr = !pbl_size ? 0 : cpu_to_be32(
157 V_FW_RI_TPTE_PBLADDR(PBL_OFF(rdev, pbl_addr)>>3));
158 tpt.len_lo = cpu_to_be32((u32)(len & 0xffffffffUL));
159 tpt.va_hi = cpu_to_be32((u32)(to >> 32));
160 tpt.va_lo_fbo = cpu_to_be32((u32)(to & 0xffffffffUL));
161 tpt.dca_mwbcnt_pstag = cpu_to_be32(0);
162 tpt.len_hi = cpu_to_be32((u32)(len >> 32));
163 }
164 err = write_adapter_mem(rdev, stag_idx +
165 (rdev->lldi.vr->stag.start >> 5),
166 sizeof(tpt), &tpt);
167
168 if (reset_tpt_entry)
169 c4iw_put_resource(&rdev->resource.tpt_fifo, stag_idx,
170 &rdev->resource.tpt_fifo_lock);
171 return err;
172 }
173
write_pbl(struct c4iw_rdev * rdev,__be64 * pbl,u32 pbl_addr,u32 pbl_size)174 static int write_pbl(struct c4iw_rdev *rdev, __be64 *pbl,
175 u32 pbl_addr, u32 pbl_size)
176 {
177 int err;
178
179 PDBG("%s *pdb_addr 0x%x, pbl_base 0x%x, pbl_size %d\n",
180 __func__, pbl_addr, rdev->lldi.vr->pbl.start,
181 pbl_size);
182
183 err = write_adapter_mem(rdev, pbl_addr >> 5, pbl_size << 3, pbl);
184 return err;
185 }
186
dereg_mem(struct c4iw_rdev * rdev,u32 stag,u32 pbl_size,u32 pbl_addr)187 static int dereg_mem(struct c4iw_rdev *rdev, u32 stag, u32 pbl_size,
188 u32 pbl_addr)
189 {
190 return write_tpt_entry(rdev, 1, &stag, 0, 0, 0, 0, 0, 0, 0UL, 0, 0,
191 pbl_size, pbl_addr);
192 }
193
allocate_window(struct c4iw_rdev * rdev,u32 * stag,u32 pdid)194 static int allocate_window(struct c4iw_rdev *rdev, u32 * stag, u32 pdid)
195 {
196 *stag = T4_STAG_UNSET;
197 return write_tpt_entry(rdev, 0, stag, 0, pdid, FW_RI_STAG_MW, 0, 0, 0,
198 0UL, 0, 0, 0, 0);
199 }
200
deallocate_window(struct c4iw_rdev * rdev,u32 stag)201 static int deallocate_window(struct c4iw_rdev *rdev, u32 stag)
202 {
203 return write_tpt_entry(rdev, 1, &stag, 0, 0, 0, 0, 0, 0, 0UL, 0, 0, 0,
204 0);
205 }
206
allocate_stag(struct c4iw_rdev * rdev,u32 * stag,u32 pdid,u32 pbl_size,u32 pbl_addr)207 static int allocate_stag(struct c4iw_rdev *rdev, u32 *stag, u32 pdid,
208 u32 pbl_size, u32 pbl_addr)
209 {
210 *stag = T4_STAG_UNSET;
211 return write_tpt_entry(rdev, 0, stag, 0, pdid, FW_RI_STAG_NSMR, 0, 0, 0,
212 0UL, 0, 0, pbl_size, pbl_addr);
213 }
214
finish_mem_reg(struct c4iw_mr * mhp,u32 stag)215 static int finish_mem_reg(struct c4iw_mr *mhp, u32 stag)
216 {
217 u32 mmid;
218
219 mhp->attr.state = 1;
220 mhp->attr.stag = stag;
221 mmid = stag >> 8;
222 mhp->ibmr.rkey = mhp->ibmr.lkey = stag;
223 PDBG("%s mmid 0x%x mhp %p\n", __func__, mmid, mhp);
224 return insert_handle(mhp->rhp, &mhp->rhp->mmidr, mhp, mmid);
225 }
226
register_mem(struct c4iw_dev * rhp,struct c4iw_pd * php,struct c4iw_mr * mhp,int shift)227 static int register_mem(struct c4iw_dev *rhp, struct c4iw_pd *php,
228 struct c4iw_mr *mhp, int shift)
229 {
230 u32 stag = T4_STAG_UNSET;
231 int ret;
232
233 ret = write_tpt_entry(&rhp->rdev, 0, &stag, 1, mhp->attr.pdid,
234 FW_RI_STAG_NSMR, mhp->attr.perms,
235 mhp->attr.mw_bind_enable, mhp->attr.zbva,
236 mhp->attr.va_fbo, mhp->attr.len, shift - 12,
237 mhp->attr.pbl_size, mhp->attr.pbl_addr);
238 if (ret)
239 return ret;
240
241 ret = finish_mem_reg(mhp, stag);
242 if (ret)
243 dereg_mem(&rhp->rdev, mhp->attr.stag, mhp->attr.pbl_size,
244 mhp->attr.pbl_addr);
245 return ret;
246 }
247
reregister_mem(struct c4iw_dev * rhp,struct c4iw_pd * php,struct c4iw_mr * mhp,int shift,int npages)248 static int reregister_mem(struct c4iw_dev *rhp, struct c4iw_pd *php,
249 struct c4iw_mr *mhp, int shift, int npages)
250 {
251 u32 stag;
252 int ret;
253
254 if (npages > mhp->attr.pbl_size)
255 return -ENOMEM;
256
257 stag = mhp->attr.stag;
258 ret = write_tpt_entry(&rhp->rdev, 0, &stag, 1, mhp->attr.pdid,
259 FW_RI_STAG_NSMR, mhp->attr.perms,
260 mhp->attr.mw_bind_enable, mhp->attr.zbva,
261 mhp->attr.va_fbo, mhp->attr.len, shift - 12,
262 mhp->attr.pbl_size, mhp->attr.pbl_addr);
263 if (ret)
264 return ret;
265
266 ret = finish_mem_reg(mhp, stag);
267 if (ret)
268 dereg_mem(&rhp->rdev, mhp->attr.stag, mhp->attr.pbl_size,
269 mhp->attr.pbl_addr);
270
271 return ret;
272 }
273
alloc_pbl(struct c4iw_mr * mhp,int npages)274 static int alloc_pbl(struct c4iw_mr *mhp, int npages)
275 {
276 mhp->attr.pbl_addr = c4iw_pblpool_alloc(&mhp->rhp->rdev,
277 npages << 3);
278
279 if (!mhp->attr.pbl_addr)
280 return -ENOMEM;
281
282 mhp->attr.pbl_size = npages;
283
284 return 0;
285 }
286
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)287 static int build_phys_page_list(struct ib_phys_buf *buffer_list,
288 int num_phys_buf, u64 *iova_start,
289 u64 *total_size, int *npages,
290 int *shift, __be64 **page_list)
291 {
292 u64 mask;
293 int i, j, n;
294
295 mask = 0;
296 *total_size = 0;
297 for (i = 0; i < num_phys_buf; ++i) {
298 if (i != 0 && buffer_list[i].addr & ~PAGE_MASK)
299 return -EINVAL;
300 if (i != 0 && i != num_phys_buf - 1 &&
301 (buffer_list[i].size & ~PAGE_MASK))
302 return -EINVAL;
303 *total_size += buffer_list[i].size;
304 if (i > 0)
305 mask |= buffer_list[i].addr;
306 else
307 mask |= buffer_list[i].addr & PAGE_MASK;
308 if (i != num_phys_buf - 1)
309 mask |= buffer_list[i].addr + buffer_list[i].size;
310 else
311 mask |= (buffer_list[i].addr + buffer_list[i].size +
312 PAGE_SIZE - 1) & PAGE_MASK;
313 }
314
315 if (*total_size > 0xFFFFFFFFULL)
316 return -ENOMEM;
317
318 /* Find largest page shift we can use to cover buffers */
319 for (*shift = PAGE_SHIFT; *shift < 27; ++(*shift))
320 if ((1ULL << *shift) & mask)
321 break;
322
323 buffer_list[0].size += buffer_list[0].addr & ((1ULL << *shift) - 1);
324 buffer_list[0].addr &= ~0ull << *shift;
325
326 *npages = 0;
327 for (i = 0; i < num_phys_buf; ++i)
328 *npages += (buffer_list[i].size +
329 (1ULL << *shift) - 1) >> *shift;
330
331 if (!*npages)
332 return -EINVAL;
333
334 *page_list = kmalloc(sizeof(u64) * *npages, GFP_KERNEL);
335 if (!*page_list)
336 return -ENOMEM;
337
338 n = 0;
339 for (i = 0; i < num_phys_buf; ++i)
340 for (j = 0;
341 j < (buffer_list[i].size + (1ULL << *shift) - 1) >> *shift;
342 ++j)
343 (*page_list)[n++] = cpu_to_be64(buffer_list[i].addr +
344 ((u64) j << *shift));
345
346 PDBG("%s va 0x%llx mask 0x%llx shift %d len %lld pbl_size %d\n",
347 __func__, (unsigned long long)*iova_start,
348 (unsigned long long)mask, *shift, (unsigned long long)*total_size,
349 *npages);
350
351 return 0;
352
353 }
354
c4iw_reregister_phys_mem(struct ib_mr * mr,int mr_rereg_mask,struct ib_pd * pd,struct ib_phys_buf * buffer_list,int num_phys_buf,int acc,u64 * iova_start)355 int c4iw_reregister_phys_mem(struct ib_mr *mr, int mr_rereg_mask,
356 struct ib_pd *pd, struct ib_phys_buf *buffer_list,
357 int num_phys_buf, int acc, u64 *iova_start)
358 {
359
360 struct c4iw_mr mh, *mhp;
361 struct c4iw_pd *php;
362 struct c4iw_dev *rhp;
363 __be64 *page_list = NULL;
364 int shift = 0;
365 u64 total_size;
366 int npages;
367 int ret;
368
369 PDBG("%s ib_mr %p ib_pd %p\n", __func__, mr, pd);
370
371 /* There can be no memory windows */
372 if (atomic_read(&mr->usecnt))
373 return -EINVAL;
374
375 mhp = to_c4iw_mr(mr);
376 rhp = mhp->rhp;
377 php = to_c4iw_pd(mr->pd);
378
379 /* make sure we are on the same adapter */
380 if (rhp != php->rhp)
381 return -EINVAL;
382
383 memcpy(&mh, mhp, sizeof *mhp);
384
385 if (mr_rereg_mask & IB_MR_REREG_PD)
386 php = to_c4iw_pd(pd);
387 if (mr_rereg_mask & IB_MR_REREG_ACCESS) {
388 mh.attr.perms = c4iw_ib_to_tpt_access(acc);
389 mh.attr.mw_bind_enable = (acc & IB_ACCESS_MW_BIND) ==
390 IB_ACCESS_MW_BIND;
391 }
392 if (mr_rereg_mask & IB_MR_REREG_TRANS) {
393 ret = build_phys_page_list(buffer_list, num_phys_buf,
394 iova_start,
395 &total_size, &npages,
396 &shift, &page_list);
397 if (ret)
398 return ret;
399 }
400
401 ret = reregister_mem(rhp, php, &mh, shift, npages);
402 kfree(page_list);
403 if (ret)
404 return ret;
405 if (mr_rereg_mask & IB_MR_REREG_PD)
406 mhp->attr.pdid = php->pdid;
407 if (mr_rereg_mask & IB_MR_REREG_ACCESS)
408 mhp->attr.perms = c4iw_ib_to_tpt_access(acc);
409 if (mr_rereg_mask & IB_MR_REREG_TRANS) {
410 mhp->attr.zbva = 0;
411 mhp->attr.va_fbo = *iova_start;
412 mhp->attr.page_size = shift - 12;
413 mhp->attr.len = (u32) total_size;
414 mhp->attr.pbl_size = npages;
415 }
416
417 return 0;
418 }
419
c4iw_register_phys_mem(struct ib_pd * pd,struct ib_phys_buf * buffer_list,int num_phys_buf,int acc,u64 * iova_start)420 struct ib_mr *c4iw_register_phys_mem(struct ib_pd *pd,
421 struct ib_phys_buf *buffer_list,
422 int num_phys_buf, int acc, u64 *iova_start)
423 {
424 __be64 *page_list;
425 int shift;
426 u64 total_size;
427 int npages;
428 struct c4iw_dev *rhp;
429 struct c4iw_pd *php;
430 struct c4iw_mr *mhp;
431 int ret;
432
433 PDBG("%s ib_pd %p\n", __func__, pd);
434 php = to_c4iw_pd(pd);
435 rhp = php->rhp;
436
437 mhp = kzalloc(sizeof(*mhp), GFP_KERNEL);
438 if (!mhp)
439 return ERR_PTR(-ENOMEM);
440
441 mhp->rhp = rhp;
442
443 /* First check that we have enough alignment */
444 if ((*iova_start & ~PAGE_MASK) != (buffer_list[0].addr & ~PAGE_MASK)) {
445 ret = -EINVAL;
446 goto err;
447 }
448
449 if (num_phys_buf > 1 &&
450 ((buffer_list[0].addr + buffer_list[0].size) & ~PAGE_MASK)) {
451 ret = -EINVAL;
452 goto err;
453 }
454
455 ret = build_phys_page_list(buffer_list, num_phys_buf, iova_start,
456 &total_size, &npages, &shift,
457 &page_list);
458 if (ret)
459 goto err;
460
461 ret = alloc_pbl(mhp, npages);
462 if (ret) {
463 kfree(page_list);
464 goto err_pbl;
465 }
466
467 ret = write_pbl(&mhp->rhp->rdev, page_list, mhp->attr.pbl_addr,
468 npages);
469 kfree(page_list);
470 if (ret)
471 goto err_pbl;
472
473 mhp->attr.pdid = php->pdid;
474 mhp->attr.zbva = 0;
475
476 mhp->attr.perms = c4iw_ib_to_tpt_access(acc);
477 mhp->attr.va_fbo = *iova_start;
478 mhp->attr.page_size = shift - 12;
479
480 mhp->attr.len = (u32) total_size;
481 mhp->attr.pbl_size = npages;
482 ret = register_mem(rhp, php, mhp, shift);
483 if (ret)
484 goto err_pbl;
485
486 return &mhp->ibmr;
487
488 err_pbl:
489 c4iw_pblpool_free(&mhp->rhp->rdev, mhp->attr.pbl_addr,
490 mhp->attr.pbl_size << 3);
491
492 err:
493 kfree(mhp);
494 return ERR_PTR(ret);
495
496 }
497
c4iw_get_dma_mr(struct ib_pd * pd,int acc)498 struct ib_mr *c4iw_get_dma_mr(struct ib_pd *pd, int acc)
499 {
500 struct c4iw_dev *rhp;
501 struct c4iw_pd *php;
502 struct c4iw_mr *mhp;
503 int ret;
504 u32 stag = T4_STAG_UNSET;
505
506 PDBG("%s ib_pd %p\n", __func__, pd);
507 php = to_c4iw_pd(pd);
508 rhp = php->rhp;
509
510 mhp = kzalloc(sizeof(*mhp), GFP_KERNEL);
511 if (!mhp)
512 return ERR_PTR(-ENOMEM);
513
514 mhp->rhp = rhp;
515 mhp->attr.pdid = php->pdid;
516 mhp->attr.perms = c4iw_ib_to_tpt_access(acc);
517 mhp->attr.mw_bind_enable = (acc&IB_ACCESS_MW_BIND) == IB_ACCESS_MW_BIND;
518 mhp->attr.zbva = 0;
519 mhp->attr.va_fbo = 0;
520 mhp->attr.page_size = 0;
521 mhp->attr.len = ~0UL;
522 mhp->attr.pbl_size = 0;
523
524 ret = write_tpt_entry(&rhp->rdev, 0, &stag, 1, php->pdid,
525 FW_RI_STAG_NSMR, mhp->attr.perms,
526 mhp->attr.mw_bind_enable, 0, 0, ~0UL, 0, 0, 0);
527 if (ret)
528 goto err1;
529
530 ret = finish_mem_reg(mhp, stag);
531 if (ret)
532 goto err2;
533 return &mhp->ibmr;
534 err2:
535 dereg_mem(&rhp->rdev, mhp->attr.stag, mhp->attr.pbl_size,
536 mhp->attr.pbl_addr);
537 err1:
538 kfree(mhp);
539 return ERR_PTR(ret);
540 }
541
c4iw_reg_user_mr(struct ib_pd * pd,u64 start,u64 length,u64 virt,int acc,struct ib_udata * udata)542 struct ib_mr *c4iw_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
543 u64 virt, int acc, struct ib_udata *udata)
544 {
545 __be64 *pages;
546 int shift, n, len;
547 int i, j, k;
548 int err = 0;
549 struct ib_umem_chunk *chunk;
550 struct c4iw_dev *rhp;
551 struct c4iw_pd *php;
552 struct c4iw_mr *mhp;
553
554 PDBG("%s ib_pd %p\n", __func__, pd);
555
556 if (length == ~0ULL)
557 return ERR_PTR(-EINVAL);
558
559 if ((length + start) < start)
560 return ERR_PTR(-EINVAL);
561
562 php = to_c4iw_pd(pd);
563 rhp = php->rhp;
564 mhp = kzalloc(sizeof(*mhp), GFP_KERNEL);
565 if (!mhp)
566 return ERR_PTR(-ENOMEM);
567
568 mhp->rhp = rhp;
569
570 mhp->umem = ib_umem_get(pd->uobject->context, start, length, acc, 0);
571 if (IS_ERR(mhp->umem)) {
572 err = PTR_ERR(mhp->umem);
573 kfree(mhp);
574 return ERR_PTR(err);
575 }
576
577 shift = ffs(mhp->umem->page_size) - 1;
578
579 n = 0;
580 list_for_each_entry(chunk, &mhp->umem->chunk_list, list)
581 n += chunk->nents;
582
583 err = alloc_pbl(mhp, n);
584 if (err)
585 goto err;
586
587 pages = (__be64 *) __get_free_page(GFP_KERNEL);
588 if (!pages) {
589 err = -ENOMEM;
590 goto err_pbl;
591 }
592
593 i = n = 0;
594
595 list_for_each_entry(chunk, &mhp->umem->chunk_list, list)
596 for (j = 0; j < chunk->nmap; ++j) {
597 len = sg_dma_len(&chunk->page_list[j]) >> shift;
598 for (k = 0; k < len; ++k) {
599 pages[i++] = cpu_to_be64(sg_dma_address(
600 &chunk->page_list[j]) +
601 mhp->umem->page_size * k);
602 if (i == PAGE_SIZE / sizeof *pages) {
603 err = write_pbl(&mhp->rhp->rdev,
604 pages,
605 mhp->attr.pbl_addr + (n << 3), i);
606 if (err)
607 goto pbl_done;
608 n += i;
609 i = 0;
610 }
611 }
612 }
613
614 if (i)
615 err = write_pbl(&mhp->rhp->rdev, pages,
616 mhp->attr.pbl_addr + (n << 3), i);
617
618 pbl_done:
619 free_page((unsigned long) pages);
620 if (err)
621 goto err_pbl;
622
623 mhp->attr.pdid = php->pdid;
624 mhp->attr.zbva = 0;
625 mhp->attr.perms = c4iw_ib_to_tpt_access(acc);
626 mhp->attr.va_fbo = virt;
627 mhp->attr.page_size = shift - 12;
628 mhp->attr.len = length;
629
630 err = register_mem(rhp, php, mhp, shift);
631 if (err)
632 goto err_pbl;
633
634 return &mhp->ibmr;
635
636 err_pbl:
637 c4iw_pblpool_free(&mhp->rhp->rdev, mhp->attr.pbl_addr,
638 mhp->attr.pbl_size << 3);
639
640 err:
641 ib_umem_release(mhp->umem);
642 kfree(mhp);
643 return ERR_PTR(err);
644 }
645
c4iw_alloc_mw(struct ib_pd * pd)646 struct ib_mw *c4iw_alloc_mw(struct ib_pd *pd)
647 {
648 struct c4iw_dev *rhp;
649 struct c4iw_pd *php;
650 struct c4iw_mw *mhp;
651 u32 mmid;
652 u32 stag = 0;
653 int ret;
654
655 php = to_c4iw_pd(pd);
656 rhp = php->rhp;
657 mhp = kzalloc(sizeof(*mhp), GFP_KERNEL);
658 if (!mhp)
659 return ERR_PTR(-ENOMEM);
660 ret = allocate_window(&rhp->rdev, &stag, php->pdid);
661 if (ret) {
662 kfree(mhp);
663 return ERR_PTR(ret);
664 }
665 mhp->rhp = rhp;
666 mhp->attr.pdid = php->pdid;
667 mhp->attr.type = FW_RI_STAG_MW;
668 mhp->attr.stag = stag;
669 mmid = (stag) >> 8;
670 mhp->ibmw.rkey = stag;
671 if (insert_handle(rhp, &rhp->mmidr, mhp, mmid)) {
672 deallocate_window(&rhp->rdev, mhp->attr.stag);
673 kfree(mhp);
674 return ERR_PTR(-ENOMEM);
675 }
676 PDBG("%s mmid 0x%x mhp %p stag 0x%x\n", __func__, mmid, mhp, stag);
677 return &(mhp->ibmw);
678 }
679
c4iw_dealloc_mw(struct ib_mw * mw)680 int c4iw_dealloc_mw(struct ib_mw *mw)
681 {
682 struct c4iw_dev *rhp;
683 struct c4iw_mw *mhp;
684 u32 mmid;
685
686 mhp = to_c4iw_mw(mw);
687 rhp = mhp->rhp;
688 mmid = (mw->rkey) >> 8;
689 deallocate_window(&rhp->rdev, mhp->attr.stag);
690 remove_handle(rhp, &rhp->mmidr, mmid);
691 kfree(mhp);
692 PDBG("%s ib_mw %p mmid 0x%x ptr %p\n", __func__, mw, mmid, mhp);
693 return 0;
694 }
695
c4iw_alloc_fast_reg_mr(struct ib_pd * pd,int pbl_depth)696 struct ib_mr *c4iw_alloc_fast_reg_mr(struct ib_pd *pd, int pbl_depth)
697 {
698 struct c4iw_dev *rhp;
699 struct c4iw_pd *php;
700 struct c4iw_mr *mhp;
701 u32 mmid;
702 u32 stag = 0;
703 int ret = 0;
704
705 php = to_c4iw_pd(pd);
706 rhp = php->rhp;
707 mhp = kzalloc(sizeof(*mhp), GFP_KERNEL);
708 if (!mhp) {
709 ret = -ENOMEM;
710 goto err;
711 }
712
713 mhp->rhp = rhp;
714 ret = alloc_pbl(mhp, pbl_depth);
715 if (ret)
716 goto err1;
717 mhp->attr.pbl_size = pbl_depth;
718 ret = allocate_stag(&rhp->rdev, &stag, php->pdid,
719 mhp->attr.pbl_size, mhp->attr.pbl_addr);
720 if (ret)
721 goto err2;
722 mhp->attr.pdid = php->pdid;
723 mhp->attr.type = FW_RI_STAG_NSMR;
724 mhp->attr.stag = stag;
725 mhp->attr.state = 1;
726 mmid = (stag) >> 8;
727 mhp->ibmr.rkey = mhp->ibmr.lkey = stag;
728 if (insert_handle(rhp, &rhp->mmidr, mhp, mmid)) {
729 ret = -ENOMEM;
730 goto err3;
731 }
732
733 PDBG("%s mmid 0x%x mhp %p stag 0x%x\n", __func__, mmid, mhp, stag);
734 return &(mhp->ibmr);
735 err3:
736 dereg_mem(&rhp->rdev, stag, mhp->attr.pbl_size,
737 mhp->attr.pbl_addr);
738 err2:
739 c4iw_pblpool_free(&mhp->rhp->rdev, mhp->attr.pbl_addr,
740 mhp->attr.pbl_size << 3);
741 err1:
742 kfree(mhp);
743 err:
744 return ERR_PTR(ret);
745 }
746
c4iw_alloc_fastreg_pbl(struct ib_device * device,int page_list_len)747 struct ib_fast_reg_page_list *c4iw_alloc_fastreg_pbl(struct ib_device *device,
748 int page_list_len)
749 {
750 struct c4iw_fr_page_list *c4pl;
751 struct c4iw_dev *dev = to_c4iw_dev(device);
752 dma_addr_t dma_addr;
753 int size = sizeof *c4pl + page_list_len * sizeof(u64);
754
755 c4pl = dma_alloc_coherent(&dev->rdev.lldi.pdev->dev, size,
756 &dma_addr, GFP_KERNEL);
757 if (!c4pl)
758 return ERR_PTR(-ENOMEM);
759
760 dma_unmap_addr_set(c4pl, mapping, dma_addr);
761 c4pl->dma_addr = dma_addr;
762 c4pl->dev = dev;
763 c4pl->size = size;
764 c4pl->ibpl.page_list = (u64 *)(c4pl + 1);
765 c4pl->ibpl.max_page_list_len = page_list_len;
766
767 return &c4pl->ibpl;
768 }
769
c4iw_free_fastreg_pbl(struct ib_fast_reg_page_list * ibpl)770 void c4iw_free_fastreg_pbl(struct ib_fast_reg_page_list *ibpl)
771 {
772 struct c4iw_fr_page_list *c4pl = to_c4iw_fr_page_list(ibpl);
773
774 dma_free_coherent(&c4pl->dev->rdev.lldi.pdev->dev, c4pl->size,
775 c4pl, dma_unmap_addr(c4pl, mapping));
776 }
777
c4iw_dereg_mr(struct ib_mr * ib_mr)778 int c4iw_dereg_mr(struct ib_mr *ib_mr)
779 {
780 struct c4iw_dev *rhp;
781 struct c4iw_mr *mhp;
782 u32 mmid;
783
784 PDBG("%s ib_mr %p\n", __func__, ib_mr);
785 /* There can be no memory windows */
786 if (atomic_read(&ib_mr->usecnt))
787 return -EINVAL;
788
789 mhp = to_c4iw_mr(ib_mr);
790 rhp = mhp->rhp;
791 mmid = mhp->attr.stag >> 8;
792 dereg_mem(&rhp->rdev, mhp->attr.stag, mhp->attr.pbl_size,
793 mhp->attr.pbl_addr);
794 if (mhp->attr.pbl_size)
795 c4iw_pblpool_free(&mhp->rhp->rdev, mhp->attr.pbl_addr,
796 mhp->attr.pbl_size << 3);
797 remove_handle(rhp, &rhp->mmidr, mmid);
798 if (mhp->kva)
799 kfree((void *) (unsigned long) mhp->kva);
800 if (mhp->umem)
801 ib_umem_release(mhp->umem);
802 PDBG("%s mmid 0x%x ptr %p\n", __func__, mmid, mhp);
803 kfree(mhp);
804 return 0;
805 }
806