1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32#include <linux/module.h>
33#include <linux/moduleparam.h>
34#include <linux/device.h>
35#include <linux/netdevice.h>
36#include <linux/etherdevice.h>
37#include <linux/delay.h>
38#include <linux/errno.h>
39#include <linux/list.h>
40#include <linux/spinlock.h>
41#include <linux/ethtool.h>
42#include <linux/rtnetlink.h>
43#include <linux/inetdevice.h>
44#include <linux/io.h>
45
46#include <asm/irq.h>
47#include <asm/byteorder.h>
48
49#include <rdma/iw_cm.h>
50#include <rdma/ib_verbs.h>
51#include <rdma/ib_smi.h>
52#include <rdma/ib_umem.h>
53#include <rdma/ib_user_verbs.h>
54
55#include "iw_cxgb4.h"
56
57static int fastreg_support = 1;
58module_param(fastreg_support, int, 0644);
59MODULE_PARM_DESC(fastreg_support, "Advertise fastreg support (default=1)");
60
61static struct ib_ah *c4iw_ah_create(struct ib_pd *pd,
62 struct ib_ah_attr *ah_attr)
63{
64 return ERR_PTR(-ENOSYS);
65}
66
67static int c4iw_ah_destroy(struct ib_ah *ah)
68{
69 return -ENOSYS;
70}
71
72static int c4iw_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
73{
74 return -ENOSYS;
75}
76
77static int c4iw_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
78{
79 return -ENOSYS;
80}
81
82static int c4iw_process_mad(struct ib_device *ibdev, int mad_flags,
83 u8 port_num, struct ib_wc *in_wc,
84 struct ib_grh *in_grh, struct ib_mad *in_mad,
85 struct ib_mad *out_mad)
86{
87 return -ENOSYS;
88}
89
90static int c4iw_dealloc_ucontext(struct ib_ucontext *context)
91{
92 struct c4iw_dev *rhp = to_c4iw_dev(context->device);
93 struct c4iw_ucontext *ucontext = to_c4iw_ucontext(context);
94 struct c4iw_mm_entry *mm, *tmp;
95
96 PDBG("%s context %p\n", __func__, context);
97 list_for_each_entry_safe(mm, tmp, &ucontext->mmaps, entry)
98 kfree(mm);
99 c4iw_release_dev_ucontext(&rhp->rdev, &ucontext->uctx);
100 kfree(ucontext);
101 return 0;
102}
103
104static struct ib_ucontext *c4iw_alloc_ucontext(struct ib_device *ibdev,
105 struct ib_udata *udata)
106{
107 struct c4iw_ucontext *context;
108 struct c4iw_dev *rhp = to_c4iw_dev(ibdev);
109
110 PDBG("%s ibdev %p\n", __func__, ibdev);
111 context = kzalloc(sizeof(*context), GFP_KERNEL);
112 if (!context)
113 return ERR_PTR(-ENOMEM);
114 c4iw_init_dev_ucontext(&rhp->rdev, &context->uctx);
115 INIT_LIST_HEAD(&context->mmaps);
116 spin_lock_init(&context->mmap_lock);
117 return &context->ibucontext;
118}
119
120static int c4iw_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
121{
122 int len = vma->vm_end - vma->vm_start;
123 u32 key = vma->vm_pgoff << PAGE_SHIFT;
124 struct c4iw_rdev *rdev;
125 int ret = 0;
126 struct c4iw_mm_entry *mm;
127 struct c4iw_ucontext *ucontext;
128 u64 addr;
129
130 PDBG("%s pgoff 0x%lx key 0x%x len %d\n", __func__, vma->vm_pgoff,
131 key, len);
132
133 if (vma->vm_start & (PAGE_SIZE-1))
134 return -EINVAL;
135
136 rdev = &(to_c4iw_dev(context->device)->rdev);
137 ucontext = to_c4iw_ucontext(context);
138
139 mm = remove_mmap(ucontext, key, len);
140 if (!mm)
141 return -EINVAL;
142 addr = mm->addr;
143 kfree(mm);
144
145 if ((addr >= pci_resource_start(rdev->lldi.pdev, 0)) &&
146 (addr < (pci_resource_start(rdev->lldi.pdev, 0) +
147 pci_resource_len(rdev->lldi.pdev, 0)))) {
148
149
150
151
152 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
153 ret = io_remap_pfn_range(vma, vma->vm_start,
154 addr >> PAGE_SHIFT,
155 len, vma->vm_page_prot);
156 } else if ((addr >= pci_resource_start(rdev->lldi.pdev, 2)) &&
157 (addr < (pci_resource_start(rdev->lldi.pdev, 2) +
158 pci_resource_len(rdev->lldi.pdev, 2)))) {
159
160
161
162
163 if (addr >= rdev->oc_mw_pa)
164 vma->vm_page_prot = t4_pgprot_wc(vma->vm_page_prot);
165 else
166 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
167 ret = io_remap_pfn_range(vma, vma->vm_start,
168 addr >> PAGE_SHIFT,
169 len, vma->vm_page_prot);
170 } else {
171
172
173
174
175 ret = remap_pfn_range(vma, vma->vm_start,
176 addr >> PAGE_SHIFT,
177 len, vma->vm_page_prot);
178 }
179
180 return ret;
181}
182
183static int c4iw_deallocate_pd(struct ib_pd *pd)
184{
185 struct c4iw_dev *rhp;
186 struct c4iw_pd *php;
187
188 php = to_c4iw_pd(pd);
189 rhp = php->rhp;
190 PDBG("%s ibpd %p pdid 0x%x\n", __func__, pd, php->pdid);
191 c4iw_put_resource(&rhp->rdev.resource.pdid_table, php->pdid);
192 mutex_lock(&rhp->rdev.stats.lock);
193 rhp->rdev.stats.pd.cur--;
194 mutex_unlock(&rhp->rdev.stats.lock);
195 kfree(php);
196 return 0;
197}
198
199static struct ib_pd *c4iw_allocate_pd(struct ib_device *ibdev,
200 struct ib_ucontext *context,
201 struct ib_udata *udata)
202{
203 struct c4iw_pd *php;
204 u32 pdid;
205 struct c4iw_dev *rhp;
206
207 PDBG("%s ibdev %p\n", __func__, ibdev);
208 rhp = (struct c4iw_dev *) ibdev;
209 pdid = c4iw_get_resource(&rhp->rdev.resource.pdid_table);
210 if (!pdid)
211 return ERR_PTR(-EINVAL);
212 php = kzalloc(sizeof(*php), GFP_KERNEL);
213 if (!php) {
214 c4iw_put_resource(&rhp->rdev.resource.pdid_table, pdid);
215 return ERR_PTR(-ENOMEM);
216 }
217 php->pdid = pdid;
218 php->rhp = rhp;
219 if (context) {
220 if (ib_copy_to_udata(udata, &php->pdid, sizeof(u32))) {
221 c4iw_deallocate_pd(&php->ibpd);
222 return ERR_PTR(-EFAULT);
223 }
224 }
225 mutex_lock(&rhp->rdev.stats.lock);
226 rhp->rdev.stats.pd.cur++;
227 if (rhp->rdev.stats.pd.cur > rhp->rdev.stats.pd.max)
228 rhp->rdev.stats.pd.max = rhp->rdev.stats.pd.cur;
229 mutex_unlock(&rhp->rdev.stats.lock);
230 PDBG("%s pdid 0x%0x ptr 0x%p\n", __func__, pdid, php);
231 return &php->ibpd;
232}
233
234static int c4iw_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
235 u16 *pkey)
236{
237 PDBG("%s ibdev %p\n", __func__, ibdev);
238 *pkey = 0;
239 return 0;
240}
241
242static int c4iw_query_gid(struct ib_device *ibdev, u8 port, int index,
243 union ib_gid *gid)
244{
245 struct c4iw_dev *dev;
246
247 PDBG("%s ibdev %p, port %d, index %d, gid %p\n",
248 __func__, ibdev, port, index, gid);
249 dev = to_c4iw_dev(ibdev);
250 BUG_ON(port == 0);
251 memset(&(gid->raw[0]), 0, sizeof(gid->raw));
252 memcpy(&(gid->raw[0]), dev->rdev.lldi.ports[port-1]->dev_addr, 6);
253 return 0;
254}
255
256static int c4iw_query_device(struct ib_device *ibdev,
257 struct ib_device_attr *props)
258{
259
260 struct c4iw_dev *dev;
261 PDBG("%s ibdev %p\n", __func__, ibdev);
262
263 dev = to_c4iw_dev(ibdev);
264 memset(props, 0, sizeof *props);
265 memcpy(&props->sys_image_guid, dev->rdev.lldi.ports[0]->dev_addr, 6);
266 props->hw_ver = dev->rdev.lldi.adapter_type;
267 props->fw_ver = dev->rdev.lldi.fw_vers;
268 props->device_cap_flags = dev->device_cap_flags;
269 props->page_size_cap = T4_PAGESIZE_MASK;
270 props->vendor_id = (u32)dev->rdev.lldi.pdev->vendor;
271 props->vendor_part_id = (u32)dev->rdev.lldi.pdev->device;
272 props->max_mr_size = T4_MAX_MR_SIZE;
273 props->max_qp = T4_MAX_NUM_QP;
274 props->max_qp_wr = T4_MAX_QP_DEPTH;
275 props->max_sge = T4_MAX_RECV_SGE;
276 props->max_sge_rd = 1;
277 props->max_qp_rd_atom = c4iw_max_read_depth;
278 props->max_qp_init_rd_atom = c4iw_max_read_depth;
279 props->max_cq = T4_MAX_NUM_CQ;
280 props->max_cqe = T4_MAX_CQ_DEPTH;
281 props->max_mr = c4iw_num_stags(&dev->rdev);
282 props->max_pd = T4_MAX_NUM_PD;
283 props->local_ca_ack_delay = 0;
284 props->max_fast_reg_page_list_len = T4_MAX_FR_DEPTH;
285
286 return 0;
287}
288
289static int c4iw_query_port(struct ib_device *ibdev, u8 port,
290 struct ib_port_attr *props)
291{
292 struct c4iw_dev *dev;
293 struct net_device *netdev;
294 struct in_device *inetdev;
295
296 PDBG("%s ibdev %p\n", __func__, ibdev);
297
298 dev = to_c4iw_dev(ibdev);
299 netdev = dev->rdev.lldi.ports[port-1];
300
301 memset(props, 0, sizeof(struct ib_port_attr));
302 props->max_mtu = IB_MTU_4096;
303 if (netdev->mtu >= 4096)
304 props->active_mtu = IB_MTU_4096;
305 else if (netdev->mtu >= 2048)
306 props->active_mtu = IB_MTU_2048;
307 else if (netdev->mtu >= 1024)
308 props->active_mtu = IB_MTU_1024;
309 else if (netdev->mtu >= 512)
310 props->active_mtu = IB_MTU_512;
311 else
312 props->active_mtu = IB_MTU_256;
313
314 if (!netif_carrier_ok(netdev))
315 props->state = IB_PORT_DOWN;
316 else {
317 inetdev = in_dev_get(netdev);
318 if (inetdev) {
319 if (inetdev->ifa_list)
320 props->state = IB_PORT_ACTIVE;
321 else
322 props->state = IB_PORT_INIT;
323 in_dev_put(inetdev);
324 } else
325 props->state = IB_PORT_INIT;
326 }
327
328 props->port_cap_flags =
329 IB_PORT_CM_SUP |
330 IB_PORT_SNMP_TUNNEL_SUP |
331 IB_PORT_REINIT_SUP |
332 IB_PORT_DEVICE_MGMT_SUP |
333 IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
334 props->gid_tbl_len = 1;
335 props->pkey_tbl_len = 1;
336 props->active_width = 2;
337 props->active_speed = IB_SPEED_DDR;
338 props->max_msg_sz = -1;
339
340 return 0;
341}
342
343static ssize_t show_rev(struct device *dev, struct device_attribute *attr,
344 char *buf)
345{
346 struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev,
347 ibdev.dev);
348 PDBG("%s dev 0x%p\n", __func__, dev);
349 return sprintf(buf, "%d\n", c4iw_dev->rdev.lldi.adapter_type);
350}
351
352static ssize_t show_fw_ver(struct device *dev, struct device_attribute *attr,
353 char *buf)
354{
355 struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev,
356 ibdev.dev);
357 PDBG("%s dev 0x%p\n", __func__, dev);
358
359 return sprintf(buf, "%u.%u.%u.%u\n",
360 FW_HDR_FW_VER_MAJOR_GET(c4iw_dev->rdev.lldi.fw_vers),
361 FW_HDR_FW_VER_MINOR_GET(c4iw_dev->rdev.lldi.fw_vers),
362 FW_HDR_FW_VER_MICRO_GET(c4iw_dev->rdev.lldi.fw_vers),
363 FW_HDR_FW_VER_BUILD_GET(c4iw_dev->rdev.lldi.fw_vers));
364}
365
366static ssize_t show_hca(struct device *dev, struct device_attribute *attr,
367 char *buf)
368{
369 struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev,
370 ibdev.dev);
371 struct ethtool_drvinfo info;
372 struct net_device *lldev = c4iw_dev->rdev.lldi.ports[0];
373
374 PDBG("%s dev 0x%p\n", __func__, dev);
375 lldev->ethtool_ops->get_drvinfo(lldev, &info);
376 return sprintf(buf, "%s\n", info.driver);
377}
378
379static ssize_t show_board(struct device *dev, struct device_attribute *attr,
380 char *buf)
381{
382 struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev,
383 ibdev.dev);
384 PDBG("%s dev 0x%p\n", __func__, dev);
385 return sprintf(buf, "%x.%x\n", c4iw_dev->rdev.lldi.pdev->vendor,
386 c4iw_dev->rdev.lldi.pdev->device);
387}
388
389static int c4iw_get_mib(struct ib_device *ibdev,
390 union rdma_protocol_stats *stats)
391{
392 struct tp_tcp_stats v4, v6;
393 struct c4iw_dev *c4iw_dev = to_c4iw_dev(ibdev);
394
395 cxgb4_get_tcp_stats(c4iw_dev->rdev.lldi.pdev, &v4, &v6);
396 memset(stats, 0, sizeof *stats);
397 stats->iw.tcpInSegs = v4.tcpInSegs + v6.tcpInSegs;
398 stats->iw.tcpOutSegs = v4.tcpOutSegs + v6.tcpOutSegs;
399 stats->iw.tcpRetransSegs = v4.tcpRetransSegs + v6.tcpRetransSegs;
400 stats->iw.tcpOutRsts = v4.tcpOutRsts + v6.tcpOutSegs;
401
402 return 0;
403}
404
405static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
406static DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
407static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
408static DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
409
410static struct device_attribute *c4iw_class_attributes[] = {
411 &dev_attr_hw_rev,
412 &dev_attr_fw_ver,
413 &dev_attr_hca_type,
414 &dev_attr_board_id,
415};
416
417int c4iw_register_device(struct c4iw_dev *dev)
418{
419 int ret;
420 int i;
421
422 PDBG("%s c4iw_dev %p\n", __func__, dev);
423 BUG_ON(!dev->rdev.lldi.ports[0]);
424 strlcpy(dev->ibdev.name, "cxgb4_%d", IB_DEVICE_NAME_MAX);
425 memset(&dev->ibdev.node_guid, 0, sizeof(dev->ibdev.node_guid));
426 memcpy(&dev->ibdev.node_guid, dev->rdev.lldi.ports[0]->dev_addr, 6);
427 dev->ibdev.owner = THIS_MODULE;
428 dev->device_cap_flags = IB_DEVICE_LOCAL_DMA_LKEY | IB_DEVICE_MEM_WINDOW;
429 if (fastreg_support)
430 dev->device_cap_flags |= IB_DEVICE_MEM_MGT_EXTENSIONS;
431 dev->ibdev.local_dma_lkey = 0;
432 dev->ibdev.uverbs_cmd_mask =
433 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
434 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
435 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
436 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
437 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
438 (1ull << IB_USER_VERBS_CMD_REG_MR) |
439 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
440 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
441 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
442 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
443 (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
444 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
445 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
446 (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
447 (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
448 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
449 (1ull << IB_USER_VERBS_CMD_POST_SEND) |
450 (1ull << IB_USER_VERBS_CMD_POST_RECV);
451 dev->ibdev.node_type = RDMA_NODE_RNIC;
452 memcpy(dev->ibdev.node_desc, C4IW_NODE_DESC, sizeof(C4IW_NODE_DESC));
453 dev->ibdev.phys_port_cnt = dev->rdev.lldi.nports;
454 dev->ibdev.num_comp_vectors = 1;
455 dev->ibdev.dma_device = &(dev->rdev.lldi.pdev->dev);
456 dev->ibdev.query_device = c4iw_query_device;
457 dev->ibdev.query_port = c4iw_query_port;
458 dev->ibdev.query_pkey = c4iw_query_pkey;
459 dev->ibdev.query_gid = c4iw_query_gid;
460 dev->ibdev.alloc_ucontext = c4iw_alloc_ucontext;
461 dev->ibdev.dealloc_ucontext = c4iw_dealloc_ucontext;
462 dev->ibdev.mmap = c4iw_mmap;
463 dev->ibdev.alloc_pd = c4iw_allocate_pd;
464 dev->ibdev.dealloc_pd = c4iw_deallocate_pd;
465 dev->ibdev.create_ah = c4iw_ah_create;
466 dev->ibdev.destroy_ah = c4iw_ah_destroy;
467 dev->ibdev.create_qp = c4iw_create_qp;
468 dev->ibdev.modify_qp = c4iw_ib_modify_qp;
469 dev->ibdev.query_qp = c4iw_ib_query_qp;
470 dev->ibdev.destroy_qp = c4iw_destroy_qp;
471 dev->ibdev.create_cq = c4iw_create_cq;
472 dev->ibdev.destroy_cq = c4iw_destroy_cq;
473 dev->ibdev.resize_cq = c4iw_resize_cq;
474 dev->ibdev.poll_cq = c4iw_poll_cq;
475 dev->ibdev.get_dma_mr = c4iw_get_dma_mr;
476 dev->ibdev.reg_phys_mr = c4iw_register_phys_mem;
477 dev->ibdev.rereg_phys_mr = c4iw_reregister_phys_mem;
478 dev->ibdev.reg_user_mr = c4iw_reg_user_mr;
479 dev->ibdev.dereg_mr = c4iw_dereg_mr;
480 dev->ibdev.alloc_mw = c4iw_alloc_mw;
481 dev->ibdev.bind_mw = c4iw_bind_mw;
482 dev->ibdev.dealloc_mw = c4iw_dealloc_mw;
483 dev->ibdev.alloc_fast_reg_mr = c4iw_alloc_fast_reg_mr;
484 dev->ibdev.alloc_fast_reg_page_list = c4iw_alloc_fastreg_pbl;
485 dev->ibdev.free_fast_reg_page_list = c4iw_free_fastreg_pbl;
486 dev->ibdev.attach_mcast = c4iw_multicast_attach;
487 dev->ibdev.detach_mcast = c4iw_multicast_detach;
488 dev->ibdev.process_mad = c4iw_process_mad;
489 dev->ibdev.req_notify_cq = c4iw_arm_cq;
490 dev->ibdev.post_send = c4iw_post_send;
491 dev->ibdev.post_recv = c4iw_post_receive;
492 dev->ibdev.get_protocol_stats = c4iw_get_mib;
493 dev->ibdev.uverbs_abi_ver = C4IW_UVERBS_ABI_VERSION;
494
495 dev->ibdev.iwcm = kmalloc(sizeof(struct iw_cm_verbs), GFP_KERNEL);
496 if (!dev->ibdev.iwcm)
497 return -ENOMEM;
498
499 dev->ibdev.iwcm->connect = c4iw_connect;
500 dev->ibdev.iwcm->accept = c4iw_accept_cr;
501 dev->ibdev.iwcm->reject = c4iw_reject_cr;
502 dev->ibdev.iwcm->create_listen = c4iw_create_listen;
503 dev->ibdev.iwcm->destroy_listen = c4iw_destroy_listen;
504 dev->ibdev.iwcm->add_ref = c4iw_qp_add_ref;
505 dev->ibdev.iwcm->rem_ref = c4iw_qp_rem_ref;
506 dev->ibdev.iwcm->get_qp = c4iw_get_qp;
507
508 ret = ib_register_device(&dev->ibdev, NULL);
509 if (ret)
510 goto bail1;
511
512 for (i = 0; i < ARRAY_SIZE(c4iw_class_attributes); ++i) {
513 ret = device_create_file(&dev->ibdev.dev,
514 c4iw_class_attributes[i]);
515 if (ret)
516 goto bail2;
517 }
518 return 0;
519bail2:
520 ib_unregister_device(&dev->ibdev);
521bail1:
522 kfree(dev->ibdev.iwcm);
523 return ret;
524}
525
526void c4iw_unregister_device(struct c4iw_dev *dev)
527{
528 int i;
529
530 PDBG("%s c4iw_dev %p\n", __func__, dev);
531 for (i = 0; i < ARRAY_SIZE(c4iw_class_attributes); ++i)
532 device_remove_file(&dev->ibdev.dev,
533 c4iw_class_attributes[i]);
534 ib_unregister_device(&dev->ibdev);
535 kfree(dev->ibdev.iwcm);
536 return;
537}
538
