1 /*
2 * Copyright (c) 2009-2013 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 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
34
35 #include "opt_inet.h"
36
37 #ifdef TCP_OFFLOAD
38 #include <asm/pgtable.h>
39 #include <linux/page.h>
40 #include <rdma/ib_verbs.h>
41 #include <rdma/ib_user_verbs.h>
42
43 #include "iw_cxgbe.h"
44 #include "user.h"
45
46 static int fastreg_support = 1;
47 module_param(fastreg_support, int, 0644);
48 MODULE_PARM_DESC(fastreg_support, "Advertise fastreg support (default = 1)");
49
c4iw_modify_port(struct ib_device * ibdev,u8 port,int port_modify_mask,struct ib_port_modify * props)50 static int c4iw_modify_port(struct ib_device *ibdev,
51 u8 port, int port_modify_mask,
52 struct ib_port_modify *props)
53 {
54 return -ENOSYS;
55 }
56
c4iw_ah_create(struct ib_pd * pd,struct ib_ah_attr * ah_attr)57 static struct ib_ah *c4iw_ah_create(struct ib_pd *pd,
58 struct ib_ah_attr *ah_attr)
59 {
60 return ERR_PTR(-ENOSYS);
61 }
62
c4iw_ah_destroy(struct ib_ah * ah)63 static int c4iw_ah_destroy(struct ib_ah *ah)
64 {
65 return -ENOSYS;
66 }
67
c4iw_multicast_attach(struct ib_qp * ibqp,union ib_gid * gid,u16 lid)68 static int c4iw_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
69 {
70 return -ENOSYS;
71 }
72
c4iw_multicast_detach(struct ib_qp * ibqp,union ib_gid * gid,u16 lid)73 static int c4iw_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
74 {
75 return -ENOSYS;
76 }
77
c4iw_process_mad(struct ib_device * ibdev,int mad_flags,u8 port_num,struct ib_wc * in_wc,struct ib_grh * in_grh,struct ib_mad * in_mad,struct ib_mad * out_mad)78 static int c4iw_process_mad(struct ib_device *ibdev, int mad_flags,
79 u8 port_num, struct ib_wc *in_wc,
80 struct ib_grh *in_grh, struct ib_mad *in_mad,
81 struct ib_mad *out_mad)
82 {
83 return -ENOSYS;
84 }
85
c4iw_dealloc_ucontext(struct ib_ucontext * context)86 static int c4iw_dealloc_ucontext(struct ib_ucontext *context)
87 {
88 struct c4iw_dev *rhp = to_c4iw_dev(context->device);
89 struct c4iw_ucontext *ucontext = to_c4iw_ucontext(context);
90 struct c4iw_mm_entry *mm, *tmp;
91
92 CTR2(KTR_IW_CXGBE, "%s context %p", __func__, context);
93 list_for_each_entry_safe(mm, tmp, &ucontext->mmaps, entry)
94 kfree(mm);
95 c4iw_release_dev_ucontext(&rhp->rdev, &ucontext->uctx);
96 kfree(ucontext);
97 return 0;
98 }
99
c4iw_alloc_ucontext(struct ib_device * ibdev,struct ib_udata * udata)100 static struct ib_ucontext *c4iw_alloc_ucontext(struct ib_device *ibdev,
101 struct ib_udata *udata)
102 {
103 struct c4iw_ucontext *context;
104 struct c4iw_dev *rhp = to_c4iw_dev(ibdev);
105
106 CTR2(KTR_IW_CXGBE, "%s ibdev %p", __func__, ibdev);
107 context = kzalloc(sizeof(*context), GFP_KERNEL);
108 if (!context)
109 return ERR_PTR(-ENOMEM);
110 c4iw_init_dev_ucontext(&rhp->rdev, &context->uctx);
111 INIT_LIST_HEAD(&context->mmaps);
112 spin_lock_init(&context->mmap_lock);
113 return &context->ibucontext;
114 }
115
116 #ifdef DOT5
t4_pgprot_wc(pgprot_t prot)117 static inline pgprot_t t4_pgprot_wc(pgprot_t prot)
118 {
119 return pgprot_writecombine(prot);
120 }
121 #endif
122
c4iw_mmap(struct ib_ucontext * context,struct vm_area_struct * vma)123 static int c4iw_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
124 {
125 int len = vma->vm_end - vma->vm_start;
126 u32 key = vma->vm_pgoff << PAGE_SHIFT;
127 struct c4iw_rdev *rdev;
128 int ret = 0;
129 struct c4iw_mm_entry *mm;
130 struct c4iw_ucontext *ucontext;
131 u64 addr, paddr;
132
133 u64 va_regs_res = 0, va_udbs_res = 0;
134 u64 len_regs_res = 0, len_udbs_res = 0;
135
136 CTR3(KTR_IW_CXGBE, "%s:1 ctx %p vma %p", __func__, context, vma);
137
138 CTR4(KTR_IW_CXGBE, "%s:1a pgoff 0x%lx key 0x%x len %d", __func__,
139 vma->vm_pgoff, key, len);
140
141 if (vma->vm_start & (PAGE_SIZE-1)) {
142 CTR3(KTR_IW_CXGBE, "%s:2 unaligned vm_start %u vma %p",
143 __func__, vma->vm_start, vma);
144 return -EINVAL;
145 }
146
147 rdev = &(to_c4iw_dev(context->device)->rdev);
148 ucontext = to_c4iw_ucontext(context);
149
150 mm = remove_mmap(ucontext, key, len);
151 if (!mm) {
152 CTR4(KTR_IW_CXGBE, "%s:3 ucontext %p key %u len %u", __func__,
153 ucontext, key, len);
154 return -EINVAL;
155 }
156 addr = mm->addr;
157 kfree(mm);
158
159 va_regs_res = (u64)rman_get_virtual(rdev->adap->regs_res);
160 len_regs_res = (u64)rman_get_size(rdev->adap->regs_res);
161 va_udbs_res = (u64)rman_get_virtual(rdev->adap->udbs_res);
162 len_udbs_res = (u64)rman_get_size(rdev->adap->udbs_res);
163
164 CTR6(KTR_IW_CXGBE,
165 "%s:4 addr %p, masync region %p:%p, udb region %p:%p", __func__,
166 addr, va_regs_res, va_regs_res+len_regs_res, va_udbs_res,
167 va_udbs_res+len_udbs_res);
168
169 if (addr >= va_regs_res && addr < va_regs_res + len_regs_res) {
170 CTR4(KTR_IW_CXGBE, "%s:5 MA_SYNC addr %p region %p, reglen %u",
171 __func__, addr, va_regs_res, len_regs_res);
172 /*
173 * MA_SYNC register...
174 */
175 paddr = vtophys(addr);
176 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
177 ret = io_remap_pfn_range(vma, vma->vm_start,
178 paddr >> PAGE_SHIFT,
179 len, vma->vm_page_prot);
180 } else {
181
182 if (addr >= va_udbs_res && addr < va_udbs_res + len_udbs_res) {
183 /*
184 * Map user DB or OCQP memory...
185 */
186 paddr = vtophys(addr);
187 CTR4(KTR_IW_CXGBE,
188 "%s:6 USER DB-GTS addr %p region %p, reglen %u",
189 __func__, addr, va_udbs_res, len_udbs_res);
190 #ifdef DOT5
191 if (is_t5(rdev->lldi.adapter_type) && map_udb_as_wc)
192 vma->vm_page_prot = t4_pgprot_wc(vma->vm_page_prot);
193 else
194 #endif
195 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
196 ret = io_remap_pfn_range(vma, vma->vm_start,
197 paddr >> PAGE_SHIFT,
198 len, vma->vm_page_prot);
199 } else {
200 /*
201 * Map WQ or CQ contig dma memory...
202 */
203 CTR4(KTR_IW_CXGBE,
204 "%s:7 WQ/CQ addr %p vm_start %u vma %p", __func__,
205 addr, vma->vm_start, vma);
206 ret = io_remap_pfn_range(vma, vma->vm_start,
207 addr >> PAGE_SHIFT,
208 len, vma->vm_page_prot);
209 }
210 }
211 CTR4(KTR_IW_CXGBE, "%s:8 ctx %p vma %p ret %u", __func__, context, vma,
212 ret);
213 return ret;
214 }
215
216 static int
c4iw_deallocate_pd(struct ib_pd * pd)217 c4iw_deallocate_pd(struct ib_pd *pd)
218 {
219 struct c4iw_pd *php = to_c4iw_pd(pd);
220 struct c4iw_dev *rhp = php->rhp;
221
222 CTR3(KTR_IW_CXGBE, "%s: pd %p, pdid 0x%x", __func__, pd, php->pdid);
223
224 c4iw_put_resource(&rhp->rdev.resource.pdid_table, php->pdid);
225 mutex_lock(&rhp->rdev.stats.lock);
226 rhp->rdev.stats.pd.cur--;
227 mutex_unlock(&rhp->rdev.stats.lock);
228 kfree(php);
229
230 return (0);
231 }
232
233 static struct ib_pd *
c4iw_allocate_pd(struct ib_device * ibdev,struct ib_ucontext * context,struct ib_udata * udata)234 c4iw_allocate_pd(struct ib_device *ibdev, struct ib_ucontext *context,
235 struct ib_udata *udata)
236 {
237 struct c4iw_pd *php;
238 u32 pdid;
239 struct c4iw_dev *rhp;
240
241 CTR4(KTR_IW_CXGBE, "%s: ibdev %p, context %p, data %p", __func__, ibdev,
242 context, udata);
243 rhp = (struct c4iw_dev *) ibdev;
244 pdid = c4iw_get_resource(&rhp->rdev.resource.pdid_table);
245 if (!pdid)
246 return ERR_PTR(-EINVAL);
247 php = kzalloc(sizeof(*php), GFP_KERNEL);
248 if (!php) {
249 c4iw_put_resource(&rhp->rdev.resource.pdid_table, pdid);
250 return ERR_PTR(-ENOMEM);
251 }
252 php->pdid = pdid;
253 php->rhp = rhp;
254 if (context) {
255 if (ib_copy_to_udata(udata, &php->pdid, sizeof(u32))) {
256 c4iw_deallocate_pd(&php->ibpd);
257 return ERR_PTR(-EFAULT);
258 }
259 }
260 mutex_lock(&rhp->rdev.stats.lock);
261 rhp->rdev.stats.pd.cur++;
262 if (rhp->rdev.stats.pd.cur > rhp->rdev.stats.pd.max)
263 rhp->rdev.stats.pd.max = rhp->rdev.stats.pd.cur;
264 mutex_unlock(&rhp->rdev.stats.lock);
265
266 CTR6(KTR_IW_CXGBE,
267 "%s: ibdev %p, context %p, data %p, pddid 0x%x, pd %p", __func__,
268 ibdev, context, udata, pdid, php);
269 return (&php->ibpd);
270 }
271
272 static int
c4iw_query_pkey(struct ib_device * ibdev,u8 port,u16 index,u16 * pkey)273 c4iw_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 *pkey)
274 {
275
276 CTR5(KTR_IW_CXGBE, "%s ibdev %p, port %d, index %d, pkey %p", __func__,
277 ibdev, port, index, pkey);
278
279 *pkey = 0;
280 return (0);
281 }
282
283 static int
c4iw_query_gid(struct ib_device * ibdev,u8 port,int index,union ib_gid * gid)284 c4iw_query_gid(struct ib_device *ibdev, u8 port, int index, union ib_gid *gid)
285 {
286 struct c4iw_dev *dev;
287 struct port_info *pi;
288 struct adapter *sc;
289
290 CTR5(KTR_IW_CXGBE, "%s ibdev %p, port %d, index %d, gid %p", __func__,
291 ibdev, port, index, gid);
292
293 memset(&gid->raw[0], 0, sizeof(gid->raw));
294 dev = to_c4iw_dev(ibdev);
295 sc = dev->rdev.adap;
296 if (port == 0 || port > sc->params.nports)
297 return (-EINVAL);
298 pi = sc->port[port - 1];
299 memcpy(&gid->raw[0], pi->vi[0].hw_addr, ETHER_ADDR_LEN);
300 return (0);
301 }
302
303 static int
c4iw_query_device(struct ib_device * ibdev,struct ib_device_attr * props)304 c4iw_query_device(struct ib_device *ibdev, struct ib_device_attr *props)
305 {
306 struct c4iw_dev *dev = to_c4iw_dev(ibdev);
307 struct adapter *sc = dev->rdev.adap;
308
309 CTR3(KTR_IW_CXGBE, "%s ibdev %p, props %p", __func__, ibdev, props);
310
311 memset(props, 0, sizeof *props);
312 memcpy(&props->sys_image_guid, sc->port[0]->vi[0].hw_addr,
313 ETHER_ADDR_LEN);
314 props->hw_ver = sc->params.chipid;
315 props->fw_ver = sc->params.fw_vers;
316 props->device_cap_flags = dev->device_cap_flags;
317 props->page_size_cap = T4_PAGESIZE_MASK;
318 props->vendor_id = pci_get_vendor(sc->dev);
319 props->vendor_part_id = pci_get_device(sc->dev);
320 props->max_mr_size = T4_MAX_MR_SIZE;
321 props->max_qp = T4_MAX_NUM_QP;
322 props->max_qp_wr = T4_MAX_QP_DEPTH;
323 props->max_sge = T4_MAX_RECV_SGE;
324 props->max_sge_rd = 1;
325 props->max_qp_rd_atom = c4iw_max_read_depth;
326 props->max_qp_init_rd_atom = c4iw_max_read_depth;
327 props->max_cq = T4_MAX_NUM_CQ;
328 props->max_cqe = T4_MAX_CQ_DEPTH;
329 props->max_mr = c4iw_num_stags(&dev->rdev);
330 props->max_pd = T4_MAX_NUM_PD;
331 props->local_ca_ack_delay = 0;
332 props->max_fast_reg_page_list_len = T4_MAX_FR_DEPTH;
333
334 return (0);
335 }
336
337 /*
338 * Returns -errno on failure.
339 */
340 static int
c4iw_query_port(struct ib_device * ibdev,u8 port,struct ib_port_attr * props)341 c4iw_query_port(struct ib_device *ibdev, u8 port, struct ib_port_attr *props)
342 {
343 struct c4iw_dev *dev;
344 struct adapter *sc;
345 struct port_info *pi;
346 struct ifnet *ifp;
347
348 CTR4(KTR_IW_CXGBE, "%s ibdev %p, port %d, props %p", __func__, ibdev,
349 port, props);
350
351 dev = to_c4iw_dev(ibdev);
352 sc = dev->rdev.adap;
353 if (port > sc->params.nports)
354 return (-EINVAL);
355 pi = sc->port[port - 1];
356 ifp = pi->vi[0].ifp;
357
358 memset(props, 0, sizeof(struct ib_port_attr));
359 props->max_mtu = IB_MTU_4096;
360 if (ifp->if_mtu >= 4096)
361 props->active_mtu = IB_MTU_4096;
362 else if (ifp->if_mtu >= 2048)
363 props->active_mtu = IB_MTU_2048;
364 else if (ifp->if_mtu >= 1024)
365 props->active_mtu = IB_MTU_1024;
366 else if (ifp->if_mtu >= 512)
367 props->active_mtu = IB_MTU_512;
368 else
369 props->active_mtu = IB_MTU_256;
370 props->state = pi->link_cfg.link_ok ? IB_PORT_ACTIVE : IB_PORT_DOWN;
371 props->port_cap_flags =
372 IB_PORT_CM_SUP |
373 IB_PORT_SNMP_TUNNEL_SUP |
374 IB_PORT_REINIT_SUP |
375 IB_PORT_DEVICE_MGMT_SUP |
376 IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
377 props->gid_tbl_len = 1;
378 props->pkey_tbl_len = 1;
379 props->active_width = 2;
380 props->active_speed = 2;
381 props->max_msg_sz = -1;
382
383 return 0;
384 }
385
386 /*
387 * Returns -errno on error.
388 */
389 int
c4iw_register_device(struct c4iw_dev * dev)390 c4iw_register_device(struct c4iw_dev *dev)
391 {
392 struct adapter *sc = dev->rdev.adap;
393 struct ib_device *ibdev = &dev->ibdev;
394 struct iw_cm_verbs *iwcm;
395 int ret;
396
397 CTR3(KTR_IW_CXGBE, "%s c4iw_dev %p, adapter %p", __func__, dev, sc);
398 BUG_ON(!sc->port[0]);
399 strlcpy(ibdev->name, device_get_nameunit(sc->dev), sizeof(ibdev->name));
400 memset(&ibdev->node_guid, 0, sizeof(ibdev->node_guid));
401 memcpy(&ibdev->node_guid, sc->port[0]->vi[0].hw_addr, ETHER_ADDR_LEN);
402 ibdev->owner = THIS_MODULE;
403 dev->device_cap_flags = IB_DEVICE_LOCAL_DMA_LKEY | IB_DEVICE_MEM_WINDOW;
404 if (fastreg_support)
405 dev->device_cap_flags |= IB_DEVICE_MEM_MGT_EXTENSIONS;
406 ibdev->local_dma_lkey = 0;
407 ibdev->uverbs_cmd_mask =
408 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
409 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
410 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
411 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
412 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
413 (1ull << IB_USER_VERBS_CMD_REG_MR) |
414 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
415 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
416 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
417 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
418 (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
419 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
420 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
421 (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
422 (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
423 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
424 (1ull << IB_USER_VERBS_CMD_POST_SEND) |
425 (1ull << IB_USER_VERBS_CMD_POST_RECV);
426 ibdev->node_type = RDMA_NODE_RNIC;
427 strlcpy(ibdev->node_desc, C4IW_NODE_DESC, sizeof(ibdev->node_desc));
428 ibdev->phys_port_cnt = sc->params.nports;
429 ibdev->num_comp_vectors = 1;
430 ibdev->dma_device = sc->dev;
431 ibdev->query_device = c4iw_query_device;
432 ibdev->query_port = c4iw_query_port;
433 ibdev->modify_port = c4iw_modify_port;
434 ibdev->query_pkey = c4iw_query_pkey;
435 ibdev->query_gid = c4iw_query_gid;
436 ibdev->alloc_ucontext = c4iw_alloc_ucontext;
437 ibdev->dealloc_ucontext = c4iw_dealloc_ucontext;
438 ibdev->mmap = c4iw_mmap;
439 ibdev->alloc_pd = c4iw_allocate_pd;
440 ibdev->dealloc_pd = c4iw_deallocate_pd;
441 ibdev->create_ah = c4iw_ah_create;
442 ibdev->destroy_ah = c4iw_ah_destroy;
443 ibdev->create_qp = c4iw_create_qp;
444 ibdev->modify_qp = c4iw_ib_modify_qp;
445 ibdev->query_qp = c4iw_ib_query_qp;
446 ibdev->destroy_qp = c4iw_destroy_qp;
447 ibdev->create_cq = c4iw_create_cq;
448 ibdev->destroy_cq = c4iw_destroy_cq;
449 ibdev->resize_cq = c4iw_resize_cq;
450 ibdev->poll_cq = c4iw_poll_cq;
451 ibdev->get_dma_mr = c4iw_get_dma_mr;
452 ibdev->reg_phys_mr = c4iw_register_phys_mem;
453 ibdev->rereg_phys_mr = c4iw_reregister_phys_mem;
454 ibdev->reg_user_mr = c4iw_reg_user_mr;
455 ibdev->dereg_mr = c4iw_dereg_mr;
456 ibdev->alloc_mw = c4iw_alloc_mw;
457 ibdev->bind_mw = c4iw_bind_mw;
458 ibdev->dealloc_mw = c4iw_dealloc_mw;
459 ibdev->alloc_fast_reg_mr = c4iw_alloc_fast_reg_mr;
460 ibdev->alloc_fast_reg_page_list = c4iw_alloc_fastreg_pbl;
461 ibdev->free_fast_reg_page_list = c4iw_free_fastreg_pbl;
462 ibdev->attach_mcast = c4iw_multicast_attach;
463 ibdev->detach_mcast = c4iw_multicast_detach;
464 ibdev->process_mad = c4iw_process_mad;
465 ibdev->req_notify_cq = c4iw_arm_cq;
466 ibdev->post_send = c4iw_post_send;
467 ibdev->post_recv = c4iw_post_receive;
468 ibdev->uverbs_abi_ver = C4IW_UVERBS_ABI_VERSION;
469
470 iwcm = kmalloc(sizeof(*iwcm), GFP_KERNEL);
471 if (iwcm == NULL)
472 return (-ENOMEM);
473
474 iwcm->connect = c4iw_connect;
475 iwcm->accept = c4iw_accept_cr;
476 iwcm->reject = c4iw_reject_cr;
477 iwcm->create_listen = c4iw_create_listen;
478 iwcm->destroy_listen = c4iw_destroy_listen;
479 iwcm->add_ref = c4iw_qp_add_ref;
480 iwcm->rem_ref = c4iw_qp_rem_ref;
481 iwcm->get_qp = c4iw_get_qp;
482 ibdev->iwcm = iwcm;
483
484 ret = ib_register_device(&dev->ibdev, NULL);
485 if (ret)
486 kfree(iwcm);
487
488 return (ret);
489 }
490
491 void
c4iw_unregister_device(struct c4iw_dev * dev)492 c4iw_unregister_device(struct c4iw_dev *dev)
493 {
494
495 CTR3(KTR_IW_CXGBE, "%s c4iw_dev %p, adapter %p", __func__, dev,
496 dev->rdev.adap);
497 ib_unregister_device(&dev->ibdev);
498 kfree(dev->ibdev.iwcm);
499 return;
500 }
501 #endif
502