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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 int c4iw_modify_port(struct ib_device *ibdev,
62 u8 port, int port_modify_mask,
63 struct ib_port_modify *props)
64{
65 return -ENOSYS;
66}
67
68static struct ib_ah *c4iw_ah_create(struct ib_pd *pd,
69 struct ib_ah_attr *ah_attr)
70{
71 return ERR_PTR(-ENOSYS);
72}
73
74static int c4iw_ah_destroy(struct ib_ah *ah)
75{
76 return -ENOSYS;
77}
78
79static int c4iw_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
80{
81 return -ENOSYS;
82}
83
84static int c4iw_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
85{
86 return -ENOSYS;
87}
88
89static int c4iw_process_mad(struct ib_device *ibdev, int mad_flags,
90 u8 port_num, struct ib_wc *in_wc,
91 struct ib_grh *in_grh, struct ib_mad *in_mad,
92 struct ib_mad *out_mad)
93{
94 return -ENOSYS;
95}
96
97static int c4iw_dealloc_ucontext(struct ib_ucontext *context)
98{
99 struct c4iw_dev *rhp = to_c4iw_dev(context->device);
100 struct c4iw_ucontext *ucontext = to_c4iw_ucontext(context);
101 struct c4iw_mm_entry *mm, *tmp;
102
103 PDBG("%s context %p\n", __func__, context);
104 list_for_each_entry_safe(mm, tmp, &ucontext->mmaps, entry)
105 kfree(mm);
106 c4iw_release_dev_ucontext(&rhp->rdev, &ucontext->uctx);
107 kfree(ucontext);
108 return 0;
109}
110
111static struct ib_ucontext *c4iw_alloc_ucontext(struct ib_device *ibdev,
112 struct ib_udata *udata)
113{
114 struct c4iw_ucontext *context;
115 struct c4iw_dev *rhp = to_c4iw_dev(ibdev);
116
117 PDBG("%s ibdev %p\n", __func__, ibdev);
118 context = kzalloc(sizeof(*context), GFP_KERNEL);
119 if (!context)
120 return ERR_PTR(-ENOMEM);
121 c4iw_init_dev_ucontext(&rhp->rdev, &context->uctx);
122 INIT_LIST_HEAD(&context->mmaps);
123 spin_lock_init(&context->mmap_lock);
124 return &context->ibucontext;
125}
126
127static int c4iw_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
128{
129 int len = vma->vm_end - vma->vm_start;
130 u32 key = vma->vm_pgoff << PAGE_SHIFT;
131 struct c4iw_rdev *rdev;
132 int ret = 0;
133 struct c4iw_mm_entry *mm;
134 struct c4iw_ucontext *ucontext;
135 u64 addr;
136
137 PDBG("%s pgoff 0x%lx key 0x%x len %d\n", __func__, vma->vm_pgoff,
138 key, len);
139
140 if (vma->vm_start & (PAGE_SIZE-1))
141 return -EINVAL;
142
143 rdev = &(to_c4iw_dev(context->device)->rdev);
144 ucontext = to_c4iw_ucontext(context);
145
146 mm = remove_mmap(ucontext, key, len);
147 if (!mm)
148 return -EINVAL;
149 addr = mm->addr;
150 kfree(mm);
151
152 if ((addr >= pci_resource_start(rdev->lldi.pdev, 0)) &&
153 (addr < (pci_resource_start(rdev->lldi.pdev, 0) +
154 pci_resource_len(rdev->lldi.pdev, 0)))) {
155
156
157
158
159 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
160 ret = io_remap_pfn_range(vma, vma->vm_start,
161 addr >> PAGE_SHIFT,
162 len, vma->vm_page_prot);
163 } else if ((addr >= pci_resource_start(rdev->lldi.pdev, 2)) &&
164 (addr < (pci_resource_start(rdev->lldi.pdev, 2) +
165 pci_resource_len(rdev->lldi.pdev, 2)))) {
166
167
168
169
170 if (addr >= rdev->oc_mw_pa)
171 vma->vm_page_prot = t4_pgprot_wc(vma->vm_page_prot);
172 else
173 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
174 ret = io_remap_pfn_range(vma, vma->vm_start,
175 addr >> PAGE_SHIFT,
176 len, vma->vm_page_prot);
177 } else {
178
179
180
181
182 ret = remap_pfn_range(vma, vma->vm_start,
183 addr >> PAGE_SHIFT,
184 len, vma->vm_page_prot);
185 }
186
187 return ret;
188}
189
190static int c4iw_deallocate_pd(struct ib_pd *pd)
191{
192 struct c4iw_dev *rhp;
193 struct c4iw_pd *php;
194
195 php = to_c4iw_pd(pd);
196 rhp = php->rhp;
197 PDBG("%s ibpd %p pdid 0x%x\n", __func__, pd, php->pdid);
198 c4iw_put_resource(&rhp->rdev.resource.pdid_fifo, php->pdid,
199 &rhp->rdev.resource.pdid_fifo_lock);
200 kfree(php);
201 return 0;
202}
203
204static struct ib_pd *c4iw_allocate_pd(struct ib_device *ibdev,
205 struct ib_ucontext *context,
206 struct ib_udata *udata)
207{
208 struct c4iw_pd *php;
209 u32 pdid;
210 struct c4iw_dev *rhp;
211
212 PDBG("%s ibdev %p\n", __func__, ibdev);
213 rhp = (struct c4iw_dev *) ibdev;
214 pdid = c4iw_get_resource(&rhp->rdev.resource.pdid_fifo,
215 &rhp->rdev.resource.pdid_fifo_lock);
216 if (!pdid)
217 return ERR_PTR(-EINVAL);
218 php = kzalloc(sizeof(*php), GFP_KERNEL);
219 if (!php) {
220 c4iw_put_resource(&rhp->rdev.resource.pdid_fifo, pdid,
221 &rhp->rdev.resource.pdid_fifo_lock);
222 return ERR_PTR(-ENOMEM);
223 }
224 php->pdid = pdid;
225 php->rhp = rhp;
226 if (context) {
227 if (ib_copy_to_udata(udata, &php->pdid, sizeof(u32))) {
228 c4iw_deallocate_pd(&php->ibpd);
229 return ERR_PTR(-EFAULT);
230 }
231 }
232 PDBG("%s pdid 0x%0x ptr 0x%p\n", __func__, pdid, php);
233 return &php->ibpd;
234}
235
236static int c4iw_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
237 u16 *pkey)
238{
239 PDBG("%s ibdev %p\n", __func__, ibdev);
240 *pkey = 0;
241 return 0;
242}
243
244static int c4iw_query_gid(struct ib_device *ibdev, u8 port, int index,
245 union ib_gid *gid)
246{
247 struct c4iw_dev *dev;
248
249 PDBG("%s ibdev %p, port %d, index %d, gid %p\n",
250 __func__, ibdev, port, index, gid);
251 dev = to_c4iw_dev(ibdev);
252 BUG_ON(port == 0);
253 memset(&(gid->raw[0]), 0, sizeof(gid->raw));
254 memcpy(&(gid->raw[0]), dev->rdev.lldi.ports[port-1]->dev_addr, 6);
255 return 0;
256}
257
258static int c4iw_query_device(struct ib_device *ibdev,
259 struct ib_device_attr *props)
260{
261
262 struct c4iw_dev *dev;
263 PDBG("%s ibdev %p\n", __func__, ibdev);
264
265 dev = to_c4iw_dev(ibdev);
266 memset(props, 0, sizeof *props);
267 memcpy(&props->sys_image_guid, dev->rdev.lldi.ports[0]->dev_addr, 6);
268 props->hw_ver = dev->rdev.lldi.adapter_type;
269 props->fw_ver = dev->rdev.lldi.fw_vers;
270 props->device_cap_flags = dev->device_cap_flags;
271 props->page_size_cap = T4_PAGESIZE_MASK;
272 props->vendor_id = (u32)dev->rdev.lldi.pdev->vendor;
273 props->vendor_part_id = (u32)dev->rdev.lldi.pdev->device;
274 props->max_mr_size = T4_MAX_MR_SIZE;
275 props->max_qp = T4_MAX_NUM_QP;
276 props->max_qp_wr = T4_MAX_QP_DEPTH;
277 props->max_sge = T4_MAX_RECV_SGE;
278 props->max_sge_rd = 1;
279 props->max_qp_rd_atom = c4iw_max_read_depth;
280 props->max_qp_init_rd_atom = c4iw_max_read_depth;
281 props->max_cq = T4_MAX_NUM_CQ;
282 props->max_cqe = T4_MAX_CQ_DEPTH;
283 props->max_mr = c4iw_num_stags(&dev->rdev);
284 props->max_pd = T4_MAX_NUM_PD;
285 props->local_ca_ack_delay = 0;
286 props->max_fast_reg_page_list_len = T4_MAX_FR_DEPTH;
287
288 return 0;
289}
290
291static int c4iw_query_port(struct ib_device *ibdev, u8 port,
292 struct ib_port_attr *props)
293{
294 struct c4iw_dev *dev;
295 struct net_device *netdev;
296 struct in_device *inetdev;
297
298 PDBG("%s ibdev %p\n", __func__, ibdev);
299
300 dev = to_c4iw_dev(ibdev);
301 netdev = dev->rdev.lldi.ports[port-1];
302
303 memset(props, 0, sizeof(struct ib_port_attr));
304 props->max_mtu = IB_MTU_4096;
305 if (netdev->mtu >= 4096)
306 props->active_mtu = IB_MTU_4096;
307 else if (netdev->mtu >= 2048)
308 props->active_mtu = IB_MTU_2048;
309 else if (netdev->mtu >= 1024)
310 props->active_mtu = IB_MTU_1024;
311 else if (netdev->mtu >= 512)
312 props->active_mtu = IB_MTU_512;
313 else
314 props->active_mtu = IB_MTU_256;
315
316 if (!netif_carrier_ok(netdev))
317 props->state = IB_PORT_DOWN;
318 else {
319 inetdev = in_dev_get(netdev);
320 if (inetdev) {
321 if (inetdev->ifa_list)
322 props->state = IB_PORT_ACTIVE;
323 else
324 props->state = IB_PORT_INIT;
325 in_dev_put(inetdev);
326 } else
327 props->state = IB_PORT_INIT;
328 }
329
330 props->port_cap_flags =
331 IB_PORT_CM_SUP |
332 IB_PORT_SNMP_TUNNEL_SUP |
333 IB_PORT_REINIT_SUP |
334 IB_PORT_DEVICE_MGMT_SUP |
335 IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
336 props->gid_tbl_len = 1;
337 props->pkey_tbl_len = 1;
338 props->active_width = 2;
339 props->active_speed = 2;
340 props->max_msg_sz = -1;
341
342 return 0;
343}
344
345static ssize_t show_rev(struct device *dev, struct device_attribute *attr,
346 char *buf)
347{
348 struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev,
349 ibdev.dev);
350 PDBG("%s dev 0x%p\n", __func__, dev);
351 return sprintf(buf, "%d\n", c4iw_dev->rdev.lldi.adapter_type);
352}
353
354static ssize_t show_fw_ver(struct device *dev, struct device_attribute *attr,
355 char *buf)
356{
357 struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev,
358 ibdev.dev);
359 PDBG("%s dev 0x%p\n", __func__, dev);
360
361 return sprintf(buf, "%u.%u.%u.%u\n",
362 FW_HDR_FW_VER_MAJOR_GET(c4iw_dev->rdev.lldi.fw_vers),
363 FW_HDR_FW_VER_MINOR_GET(c4iw_dev->rdev.lldi.fw_vers),
364 FW_HDR_FW_VER_MICRO_GET(c4iw_dev->rdev.lldi.fw_vers),
365 FW_HDR_FW_VER_BUILD_GET(c4iw_dev->rdev.lldi.fw_vers));
366}
367
368static ssize_t show_hca(struct device *dev, struct device_attribute *attr,
369 char *buf)
370{
371 struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev,
372 ibdev.dev);
373 struct ethtool_drvinfo info;
374 struct net_device *lldev = c4iw_dev->rdev.lldi.ports[0];
375
376 PDBG("%s dev 0x%p\n", __func__, dev);
377 lldev->ethtool_ops->get_drvinfo(lldev, &info);
378 return sprintf(buf, "%s\n", info.driver);
379}
380
381static ssize_t show_board(struct device *dev, struct device_attribute *attr,
382 char *buf)
383{
384 struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev,
385 ibdev.dev);
386 PDBG("%s dev 0x%p\n", __func__, dev);
387 return sprintf(buf, "%x.%x\n", c4iw_dev->rdev.lldi.pdev->vendor,
388 c4iw_dev->rdev.lldi.pdev->device);
389}
390
391static int c4iw_get_mib(struct ib_device *ibdev,
392 union rdma_protocol_stats *stats)
393{
394 struct tp_tcp_stats v4, v6;
395 struct c4iw_dev *c4iw_dev = to_c4iw_dev(ibdev);
396
397 cxgb4_get_tcp_stats(c4iw_dev->rdev.lldi.pdev, &v4, &v6);
398 memset(stats, 0, sizeof *stats);
399 stats->iw.tcpInSegs = v4.tcpInSegs + v6.tcpInSegs;
400 stats->iw.tcpOutSegs = v4.tcpOutSegs + v6.tcpOutSegs;
401 stats->iw.tcpRetransSegs = v4.tcpRetransSegs + v6.tcpRetransSegs;
402 stats->iw.tcpOutRsts = v4.tcpOutRsts + v6.tcpOutSegs;
403
404 return 0;
405}
406
407static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
408static DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
409static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
410static DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
411
412static struct device_attribute *c4iw_class_attributes[] = {
413 &dev_attr_hw_rev,
414 &dev_attr_fw_ver,
415 &dev_attr_hca_type,
416 &dev_attr_board_id,
417};
418
419int c4iw_register_device(struct c4iw_dev *dev)
420{
421 int ret;
422 int i;
423
424 PDBG("%s c4iw_dev %p\n", __func__, dev);
425 BUG_ON(!dev->rdev.lldi.ports[0]);
426 strlcpy(dev->ibdev.name, "cxgb4_%d", IB_DEVICE_NAME_MAX);
427 memset(&dev->ibdev.node_guid, 0, sizeof(dev->ibdev.node_guid));
428 memcpy(&dev->ibdev.node_guid, dev->rdev.lldi.ports[0]->dev_addr, 6);
429 dev->ibdev.owner = THIS_MODULE;
430 dev->device_cap_flags = IB_DEVICE_LOCAL_DMA_LKEY | IB_DEVICE_MEM_WINDOW;
431 if (fastreg_support)
432 dev->device_cap_flags |= IB_DEVICE_MEM_MGT_EXTENSIONS;
433 dev->ibdev.local_dma_lkey = 0;
434 dev->ibdev.uverbs_cmd_mask =
435 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
436 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
437 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
438 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
439 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
440 (1ull << IB_USER_VERBS_CMD_REG_MR) |
441 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
442 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
443 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
444 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
445 (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
446 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
447 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
448 (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
449 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
450 (1ull << IB_USER_VERBS_CMD_POST_SEND) |
451 (1ull << IB_USER_VERBS_CMD_POST_RECV);
452 dev->ibdev.node_type = RDMA_NODE_RNIC;
453 memcpy(dev->ibdev.node_desc, C4IW_NODE_DESC, sizeof(C4IW_NODE_DESC));
454 dev->ibdev.phys_port_cnt = dev->rdev.lldi.nports;
455 dev->ibdev.num_comp_vectors = 1;
456 dev->ibdev.dma_device = &(dev->rdev.lldi.pdev->dev);
457 dev->ibdev.query_device = c4iw_query_device;
458 dev->ibdev.query_port = c4iw_query_port;
459 dev->ibdev.modify_port = c4iw_modify_port;
460 dev->ibdev.query_pkey = c4iw_query_pkey;
461 dev->ibdev.query_gid = c4iw_query_gid;
462 dev->ibdev.alloc_ucontext = c4iw_alloc_ucontext;
463 dev->ibdev.dealloc_ucontext = c4iw_dealloc_ucontext;
464 dev->ibdev.mmap = c4iw_mmap;
465 dev->ibdev.alloc_pd = c4iw_allocate_pd;
466 dev->ibdev.dealloc_pd = c4iw_deallocate_pd;
467 dev->ibdev.create_ah = c4iw_ah_create;
468 dev->ibdev.destroy_ah = c4iw_ah_destroy;
469 dev->ibdev.create_qp = c4iw_create_qp;
470 dev->ibdev.modify_qp = c4iw_ib_modify_qp;
471 dev->ibdev.destroy_qp = c4iw_destroy_qp;
472 dev->ibdev.create_cq = c4iw_create_cq;
473 dev->ibdev.destroy_cq = c4iw_destroy_cq;
474 dev->ibdev.resize_cq = c4iw_resize_cq;
475 dev->ibdev.poll_cq = c4iw_poll_cq;
476 dev->ibdev.get_dma_mr = c4iw_get_dma_mr;
477 dev->ibdev.reg_phys_mr = c4iw_register_phys_mem;
478 dev->ibdev.rereg_phys_mr = c4iw_reregister_phys_mem;
479 dev->ibdev.reg_user_mr = c4iw_reg_user_mr;
480 dev->ibdev.dereg_mr = c4iw_dereg_mr;
481 dev->ibdev.alloc_mw = c4iw_alloc_mw;
482 dev->ibdev.bind_mw = c4iw_bind_mw;
483 dev->ibdev.dealloc_mw = c4iw_dealloc_mw;
484 dev->ibdev.alloc_fast_reg_mr = c4iw_alloc_fast_reg_mr;
485 dev->ibdev.alloc_fast_reg_page_list = c4iw_alloc_fastreg_pbl;
486 dev->ibdev.free_fast_reg_page_list = c4iw_free_fastreg_pbl;
487 dev->ibdev.attach_mcast = c4iw_multicast_attach;
488 dev->ibdev.detach_mcast = c4iw_multicast_detach;
489 dev->ibdev.process_mad = c4iw_process_mad;
490 dev->ibdev.req_notify_cq = c4iw_arm_cq;
491 dev->ibdev.post_send = c4iw_post_send;
492 dev->ibdev.post_recv = c4iw_post_receive;
493 dev->ibdev.get_protocol_stats = c4iw_get_mib;
494 dev->ibdev.uverbs_abi_ver = C4IW_UVERBS_ABI_VERSION;
495
496 dev->ibdev.iwcm = kmalloc(sizeof(struct iw_cm_verbs), GFP_KERNEL);
497 if (!dev->ibdev.iwcm)
498 return -ENOMEM;
499
500 dev->ibdev.iwcm->connect = c4iw_connect;
501 dev->ibdev.iwcm->accept = c4iw_accept_cr;
502 dev->ibdev.iwcm->reject = c4iw_reject_cr;
503 dev->ibdev.iwcm->create_listen = c4iw_create_listen;
504 dev->ibdev.iwcm->destroy_listen = c4iw_destroy_listen;
505 dev->ibdev.iwcm->add_ref = c4iw_qp_add_ref;
506 dev->ibdev.iwcm->rem_ref = c4iw_qp_rem_ref;
507 dev->ibdev.iwcm->get_qp = c4iw_get_qp;
508
509 ret = ib_register_device(&dev->ibdev, NULL);
510 if (ret)
511 goto bail1;
512
513 for (i = 0; i < ARRAY_SIZE(c4iw_class_attributes); ++i) {
514 ret = device_create_file(&dev->ibdev.dev,
515 c4iw_class_attributes[i]);
516 if (ret)
517 goto bail2;
518 }
519 return 0;
520bail2:
521 ib_unregister_device(&dev->ibdev);
522bail1:
523 kfree(dev->ibdev.iwcm);
524 return ret;
525}
526
527void c4iw_unregister_device(struct c4iw_dev *dev)
528{
529 int i;
530
531 PDBG("%s c4iw_dev %p\n", __func__, dev);
532 for (i = 0; i < ARRAY_SIZE(c4iw_class_attributes); ++i)
533 device_remove_file(&dev->ibdev.dev,
534 c4iw_class_attributes[i]);
535 ib_unregister_device(&dev->ibdev);
536 kfree(dev->ibdev.iwcm);
537 return;
538}
539
