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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 void c4iw_dealloc_ucontext(struct ib_ucontext *context)
62{
63 struct c4iw_ucontext *ucontext = to_c4iw_ucontext(context);
64 struct c4iw_dev *rhp;
65 struct c4iw_mm_entry *mm, *tmp;
66
67 pr_debug("context %p\n", context);
68 rhp = to_c4iw_dev(ucontext->ibucontext.device);
69
70 list_for_each_entry_safe(mm, tmp, &ucontext->mmaps, entry)
71 kfree(mm);
72 c4iw_release_dev_ucontext(&rhp->rdev, &ucontext->uctx);
73}
74
75static int c4iw_alloc_ucontext(struct ib_ucontext *ucontext,
76 struct ib_udata *udata)
77{
78 struct ib_device *ibdev = ucontext->device;
79 struct c4iw_ucontext *context = to_c4iw_ucontext(ucontext);
80 struct c4iw_dev *rhp = to_c4iw_dev(ibdev);
81 struct c4iw_alloc_ucontext_resp uresp;
82 int ret = 0;
83 struct c4iw_mm_entry *mm = NULL;
84
85 pr_debug("ibdev %p\n", ibdev);
86 c4iw_init_dev_ucontext(&rhp->rdev, &context->uctx);
87 INIT_LIST_HEAD(&context->mmaps);
88 spin_lock_init(&context->mmap_lock);
89
90 if (udata->outlen < sizeof(uresp) - sizeof(uresp.reserved)) {
91 pr_err_once("Warning - downlevel libcxgb4 (non-fatal), device status page disabled\n");
92 rhp->rdev.flags |= T4_STATUS_PAGE_DISABLED;
93 } else {
94 mm = kmalloc(sizeof(*mm), GFP_KERNEL);
95 if (!mm) {
96 ret = -ENOMEM;
97 goto err;
98 }
99
100 uresp.status_page_size = PAGE_SIZE;
101
102 spin_lock(&context->mmap_lock);
103 uresp.status_page_key = context->key;
104 context->key += PAGE_SIZE;
105 spin_unlock(&context->mmap_lock);
106
107 ret = ib_copy_to_udata(udata, &uresp,
108 sizeof(uresp) - sizeof(uresp.reserved));
109 if (ret)
110 goto err_mm;
111
112 mm->key = uresp.status_page_key;
113 mm->addr = virt_to_phys(rhp->rdev.status_page);
114 mm->len = PAGE_SIZE;
115 insert_mmap(context, mm);
116 }
117 return 0;
118err_mm:
119 kfree(mm);
120err:
121 return ret;
122}
123
124static int c4iw_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
125{
126 int len = vma->vm_end - vma->vm_start;
127 u32 key = vma->vm_pgoff << PAGE_SHIFT;
128 struct c4iw_rdev *rdev;
129 int ret = 0;
130 struct c4iw_mm_entry *mm;
131 struct c4iw_ucontext *ucontext;
132 u64 addr;
133
134 pr_debug("pgoff 0x%lx key 0x%x len %d\n", vma->vm_pgoff,
135 key, len);
136
137 if (vma->vm_start & (PAGE_SIZE-1))
138 return -EINVAL;
139
140 rdev = &(to_c4iw_dev(context->device)->rdev);
141 ucontext = to_c4iw_ucontext(context);
142
143 mm = remove_mmap(ucontext, key, len);
144 if (!mm)
145 return -EINVAL;
146 addr = mm->addr;
147 kfree(mm);
148
149 if ((addr >= pci_resource_start(rdev->lldi.pdev, 0)) &&
150 (addr < (pci_resource_start(rdev->lldi.pdev, 0) +
151 pci_resource_len(rdev->lldi.pdev, 0)))) {
152
153
154
155
156 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
157 ret = io_remap_pfn_range(vma, vma->vm_start,
158 addr >> PAGE_SHIFT,
159 len, vma->vm_page_prot);
160 } else if ((addr >= pci_resource_start(rdev->lldi.pdev, 2)) &&
161 (addr < (pci_resource_start(rdev->lldi.pdev, 2) +
162 pci_resource_len(rdev->lldi.pdev, 2)))) {
163
164
165
166
167 if (addr >= rdev->oc_mw_pa)
168 vma->vm_page_prot = t4_pgprot_wc(vma->vm_page_prot);
169 else {
170 if (!is_t4(rdev->lldi.adapter_type))
171 vma->vm_page_prot =
172 t4_pgprot_wc(vma->vm_page_prot);
173 else
174 vma->vm_page_prot =
175 pgprot_noncached(vma->vm_page_prot);
176 }
177 ret = io_remap_pfn_range(vma, vma->vm_start,
178 addr >> PAGE_SHIFT,
179 len, vma->vm_page_prot);
180 } else {
181
182
183
184
185 ret = remap_pfn_range(vma, vma->vm_start,
186 addr >> PAGE_SHIFT,
187 len, vma->vm_page_prot);
188 }
189
190 return ret;
191}
192
193static int c4iw_deallocate_pd(struct ib_pd *pd, struct ib_udata *udata)
194{
195 struct c4iw_dev *rhp;
196 struct c4iw_pd *php;
197
198 php = to_c4iw_pd(pd);
199 rhp = php->rhp;
200 pr_debug("ibpd %p pdid 0x%x\n", pd, php->pdid);
201 c4iw_put_resource(&rhp->rdev.resource.pdid_table, php->pdid);
202 mutex_lock(&rhp->rdev.stats.lock);
203 rhp->rdev.stats.pd.cur--;
204 mutex_unlock(&rhp->rdev.stats.lock);
205 return 0;
206}
207
208static int c4iw_allocate_pd(struct ib_pd *pd, struct ib_udata *udata)
209{
210 struct c4iw_pd *php = to_c4iw_pd(pd);
211 struct ib_device *ibdev = pd->device;
212 u32 pdid;
213 struct c4iw_dev *rhp;
214
215 pr_debug("ibdev %p\n", ibdev);
216 rhp = (struct c4iw_dev *) ibdev;
217 pdid = c4iw_get_resource(&rhp->rdev.resource.pdid_table);
218 if (!pdid)
219 return -EINVAL;
220
221 php->pdid = pdid;
222 php->rhp = rhp;
223 if (udata) {
224 struct c4iw_alloc_pd_resp uresp = {.pdid = php->pdid};
225
226 if (ib_copy_to_udata(udata, &uresp, sizeof(uresp))) {
227 c4iw_deallocate_pd(&php->ibpd, udata);
228 return -EFAULT;
229 }
230 }
231 mutex_lock(&rhp->rdev.stats.lock);
232 rhp->rdev.stats.pd.cur++;
233 if (rhp->rdev.stats.pd.cur > rhp->rdev.stats.pd.max)
234 rhp->rdev.stats.pd.max = rhp->rdev.stats.pd.cur;
235 mutex_unlock(&rhp->rdev.stats.lock);
236 pr_debug("pdid 0x%0x ptr 0x%p\n", pdid, php);
237 return 0;
238}
239
240static int c4iw_query_gid(struct ib_device *ibdev, u32 port, int index,
241 union ib_gid *gid)
242{
243 struct c4iw_dev *dev;
244
245 pr_debug("ibdev %p, port %u, index %d, gid %p\n",
246 ibdev, port, index, gid);
247 if (!port)
248 return -EINVAL;
249 dev = to_c4iw_dev(ibdev);
250 memset(&(gid->raw[0]), 0, sizeof(gid->raw));
251 memcpy(&(gid->raw[0]), dev->rdev.lldi.ports[port-1]->dev_addr, 6);
252 return 0;
253}
254
255static int c4iw_query_device(struct ib_device *ibdev, struct ib_device_attr *props,
256 struct ib_udata *uhw)
257{
258
259 struct c4iw_dev *dev;
260
261 pr_debug("ibdev %p\n", ibdev);
262
263 if (uhw->inlen || uhw->outlen)
264 return -EINVAL;
265
266 dev = to_c4iw_dev(ibdev);
267 memcpy(&props->sys_image_guid, dev->rdev.lldi.ports[0]->dev_addr, 6);
268 props->hw_ver = CHELSIO_CHIP_RELEASE(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 = dev->rdev.lldi.vr->qp.size / 2;
276 props->max_srq = dev->rdev.lldi.vr->srq.size;
277 props->max_qp_wr = dev->rdev.hw_queue.t4_max_qp_depth;
278 props->max_srq_wr = dev->rdev.hw_queue.t4_max_qp_depth;
279 props->max_send_sge = min(T4_MAX_SEND_SGE, T4_MAX_WRITE_SGE);
280 props->max_recv_sge = T4_MAX_RECV_SGE;
281 props->max_srq_sge = T4_MAX_RECV_SGE;
282 props->max_sge_rd = 1;
283 props->max_res_rd_atom = dev->rdev.lldi.max_ird_adapter;
284 props->max_qp_rd_atom = min(dev->rdev.lldi.max_ordird_qp,
285 c4iw_max_read_depth);
286 props->max_qp_init_rd_atom = props->max_qp_rd_atom;
287 props->max_cq = dev->rdev.lldi.vr->qp.size;
288 props->max_cqe = dev->rdev.hw_queue.t4_max_cq_depth;
289 props->max_mr = c4iw_num_stags(&dev->rdev);
290 props->max_pd = T4_MAX_NUM_PD;
291 props->local_ca_ack_delay = 0;
292 props->max_fast_reg_page_list_len =
293 t4_max_fr_depth(dev->rdev.lldi.ulptx_memwrite_dsgl && use_dsgl);
294
295 return 0;
296}
297
298static int c4iw_query_port(struct ib_device *ibdev, u32 port,
299 struct ib_port_attr *props)
300{
301 int ret = 0;
302 pr_debug("ibdev %p\n", ibdev);
303 ret = ib_get_eth_speed(ibdev, port, &props->active_speed,
304 &props->active_width);
305
306 props->port_cap_flags =
307 IB_PORT_CM_SUP |
308 IB_PORT_SNMP_TUNNEL_SUP |
309 IB_PORT_REINIT_SUP |
310 IB_PORT_DEVICE_MGMT_SUP |
311 IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
312 props->gid_tbl_len = 1;
313 props->max_msg_sz = -1;
314
315 return ret;
316}
317
318static ssize_t hw_rev_show(struct device *dev,
319 struct device_attribute *attr, char *buf)
320{
321 struct c4iw_dev *c4iw_dev =
322 rdma_device_to_drv_device(dev, struct c4iw_dev, ibdev);
323
324 pr_debug("dev 0x%p\n", dev);
325 return sysfs_emit(
326 buf, "%d\n",
327 CHELSIO_CHIP_RELEASE(c4iw_dev->rdev.lldi.adapter_type));
328}
329static DEVICE_ATTR_RO(hw_rev);
330
331static ssize_t hca_type_show(struct device *dev,
332 struct device_attribute *attr, char *buf)
333{
334 struct c4iw_dev *c4iw_dev =
335 rdma_device_to_drv_device(dev, struct c4iw_dev, ibdev);
336 struct ethtool_drvinfo info;
337 struct net_device *lldev = c4iw_dev->rdev.lldi.ports[0];
338
339 pr_debug("dev 0x%p\n", dev);
340 lldev->ethtool_ops->get_drvinfo(lldev, &info);
341 return sysfs_emit(buf, "%s\n", info.driver);
342}
343static DEVICE_ATTR_RO(hca_type);
344
345static ssize_t board_id_show(struct device *dev, struct device_attribute *attr,
346 char *buf)
347{
348 struct c4iw_dev *c4iw_dev =
349 rdma_device_to_drv_device(dev, struct c4iw_dev, ibdev);
350
351 pr_debug("dev 0x%p\n", dev);
352 return sysfs_emit(buf, "%x.%x\n", c4iw_dev->rdev.lldi.pdev->vendor,
353 c4iw_dev->rdev.lldi.pdev->device);
354}
355static DEVICE_ATTR_RO(board_id);
356
357enum counters {
358 IP4INSEGS,
359 IP4OUTSEGS,
360 IP4RETRANSSEGS,
361 IP4OUTRSTS,
362 IP6INSEGS,
363 IP6OUTSEGS,
364 IP6RETRANSSEGS,
365 IP6OUTRSTS,
366 NR_COUNTERS
367};
368
369static const char * const names[] = {
370 [IP4INSEGS] = "ip4InSegs",
371 [IP4OUTSEGS] = "ip4OutSegs",
372 [IP4RETRANSSEGS] = "ip4RetransSegs",
373 [IP4OUTRSTS] = "ip4OutRsts",
374 [IP6INSEGS] = "ip6InSegs",
375 [IP6OUTSEGS] = "ip6OutSegs",
376 [IP6RETRANSSEGS] = "ip6RetransSegs",
377 [IP6OUTRSTS] = "ip6OutRsts"
378};
379
380static struct rdma_hw_stats *c4iw_alloc_device_stats(struct ib_device *ibdev)
381{
382 BUILD_BUG_ON(ARRAY_SIZE(names) != NR_COUNTERS);
383
384
385 return rdma_alloc_hw_stats_struct(names, NR_COUNTERS,
386 RDMA_HW_STATS_DEFAULT_LIFESPAN);
387}
388
389static int c4iw_get_mib(struct ib_device *ibdev,
390 struct rdma_hw_stats *stats,
391 u32 port, int index)
392{
393 struct tp_tcp_stats v4, v6;
394 struct c4iw_dev *c4iw_dev = to_c4iw_dev(ibdev);
395
396 cxgb4_get_tcp_stats(c4iw_dev->rdev.lldi.pdev, &v4, &v6);
397 stats->value[IP4INSEGS] = v4.tcp_in_segs;
398 stats->value[IP4OUTSEGS] = v4.tcp_out_segs;
399 stats->value[IP4RETRANSSEGS] = v4.tcp_retrans_segs;
400 stats->value[IP4OUTRSTS] = v4.tcp_out_rsts;
401 stats->value[IP6INSEGS] = v6.tcp_in_segs;
402 stats->value[IP6OUTSEGS] = v6.tcp_out_segs;
403 stats->value[IP6RETRANSSEGS] = v6.tcp_retrans_segs;
404 stats->value[IP6OUTRSTS] = v6.tcp_out_rsts;
405
406 return stats->num_counters;
407}
408
409static struct attribute *c4iw_class_attributes[] = {
410 &dev_attr_hw_rev.attr,
411 &dev_attr_hca_type.attr,
412 &dev_attr_board_id.attr,
413 NULL
414};
415
416static const struct attribute_group c4iw_attr_group = {
417 .attrs = c4iw_class_attributes,
418};
419
420static int c4iw_port_immutable(struct ib_device *ibdev, u32 port_num,
421 struct ib_port_immutable *immutable)
422{
423 struct ib_port_attr attr;
424 int err;
425
426 immutable->core_cap_flags = RDMA_CORE_PORT_IWARP;
427
428 err = ib_query_port(ibdev, port_num, &attr);
429 if (err)
430 return err;
431
432 immutable->gid_tbl_len = attr.gid_tbl_len;
433
434 return 0;
435}
436
437static void get_dev_fw_str(struct ib_device *dev, char *str)
438{
439 struct c4iw_dev *c4iw_dev = container_of(dev, struct c4iw_dev,
440 ibdev);
441 pr_debug("dev 0x%p\n", dev);
442
443 snprintf(str, IB_FW_VERSION_NAME_MAX, "%u.%u.%u.%u",
444 FW_HDR_FW_VER_MAJOR_G(c4iw_dev->rdev.lldi.fw_vers),
445 FW_HDR_FW_VER_MINOR_G(c4iw_dev->rdev.lldi.fw_vers),
446 FW_HDR_FW_VER_MICRO_G(c4iw_dev->rdev.lldi.fw_vers),
447 FW_HDR_FW_VER_BUILD_G(c4iw_dev->rdev.lldi.fw_vers));
448}
449
450static const struct ib_device_ops c4iw_dev_ops = {
451 .owner = THIS_MODULE,
452 .driver_id = RDMA_DRIVER_CXGB4,
453 .uverbs_abi_ver = C4IW_UVERBS_ABI_VERSION,
454
455 .alloc_hw_device_stats = c4iw_alloc_device_stats,
456 .alloc_mr = c4iw_alloc_mr,
457 .alloc_pd = c4iw_allocate_pd,
458 .alloc_ucontext = c4iw_alloc_ucontext,
459 .create_cq = c4iw_create_cq,
460 .create_qp = c4iw_create_qp,
461 .create_srq = c4iw_create_srq,
462 .dealloc_pd = c4iw_deallocate_pd,
463 .dealloc_ucontext = c4iw_dealloc_ucontext,
464 .dereg_mr = c4iw_dereg_mr,
465 .destroy_cq = c4iw_destroy_cq,
466 .destroy_qp = c4iw_destroy_qp,
467 .destroy_srq = c4iw_destroy_srq,
468 .device_group = &c4iw_attr_group,
469 .fill_res_cq_entry = c4iw_fill_res_cq_entry,
470 .fill_res_cm_id_entry = c4iw_fill_res_cm_id_entry,
471 .fill_res_mr_entry = c4iw_fill_res_mr_entry,
472 .get_dev_fw_str = get_dev_fw_str,
473 .get_dma_mr = c4iw_get_dma_mr,
474 .get_hw_stats = c4iw_get_mib,
475 .get_port_immutable = c4iw_port_immutable,
476 .iw_accept = c4iw_accept_cr,
477 .iw_add_ref = c4iw_qp_add_ref,
478 .iw_connect = c4iw_connect,
479 .iw_create_listen = c4iw_create_listen,
480 .iw_destroy_listen = c4iw_destroy_listen,
481 .iw_get_qp = c4iw_get_qp,
482 .iw_reject = c4iw_reject_cr,
483 .iw_rem_ref = c4iw_qp_rem_ref,
484 .map_mr_sg = c4iw_map_mr_sg,
485 .mmap = c4iw_mmap,
486 .modify_qp = c4iw_ib_modify_qp,
487 .modify_srq = c4iw_modify_srq,
488 .poll_cq = c4iw_poll_cq,
489 .post_recv = c4iw_post_receive,
490 .post_send = c4iw_post_send,
491 .post_srq_recv = c4iw_post_srq_recv,
492 .query_device = c4iw_query_device,
493 .query_gid = c4iw_query_gid,
494 .query_port = c4iw_query_port,
495 .query_qp = c4iw_ib_query_qp,
496 .reg_user_mr = c4iw_reg_user_mr,
497 .req_notify_cq = c4iw_arm_cq,
498
499 INIT_RDMA_OBJ_SIZE(ib_cq, c4iw_cq, ibcq),
500 INIT_RDMA_OBJ_SIZE(ib_mw, c4iw_mw, ibmw),
501 INIT_RDMA_OBJ_SIZE(ib_pd, c4iw_pd, ibpd),
502 INIT_RDMA_OBJ_SIZE(ib_qp, c4iw_qp, ibqp),
503 INIT_RDMA_OBJ_SIZE(ib_srq, c4iw_srq, ibsrq),
504 INIT_RDMA_OBJ_SIZE(ib_ucontext, c4iw_ucontext, ibucontext),
505};
506
507static int set_netdevs(struct ib_device *ib_dev, struct c4iw_rdev *rdev)
508{
509 int ret;
510 int i;
511
512 for (i = 0; i < rdev->lldi.nports; i++) {
513 ret = ib_device_set_netdev(ib_dev, rdev->lldi.ports[i],
514 i + 1);
515 if (ret)
516 return ret;
517 }
518 return 0;
519}
520
521void c4iw_register_device(struct work_struct *work)
522{
523 int ret;
524 struct uld_ctx *ctx = container_of(work, struct uld_ctx, reg_work);
525 struct c4iw_dev *dev = ctx->dev;
526
527 pr_debug("c4iw_dev %p\n", dev);
528 memset(&dev->ibdev.node_guid, 0, sizeof(dev->ibdev.node_guid));
529 memcpy(&dev->ibdev.node_guid, dev->rdev.lldi.ports[0]->dev_addr, 6);
530 dev->device_cap_flags = IB_DEVICE_LOCAL_DMA_LKEY | IB_DEVICE_MEM_WINDOW;
531 if (fastreg_support)
532 dev->device_cap_flags |= IB_DEVICE_MEM_MGT_EXTENSIONS;
533 dev->ibdev.local_dma_lkey = 0;
534 dev->ibdev.node_type = RDMA_NODE_RNIC;
535 BUILD_BUG_ON(sizeof(C4IW_NODE_DESC) > IB_DEVICE_NODE_DESC_MAX);
536 memcpy(dev->ibdev.node_desc, C4IW_NODE_DESC, sizeof(C4IW_NODE_DESC));
537 dev->ibdev.phys_port_cnt = dev->rdev.lldi.nports;
538 dev->ibdev.num_comp_vectors = dev->rdev.lldi.nciq;
539 dev->ibdev.dev.parent = &dev->rdev.lldi.pdev->dev;
540
541 memcpy(dev->ibdev.iw_ifname, dev->rdev.lldi.ports[0]->name,
542 sizeof(dev->ibdev.iw_ifname));
543
544 ib_set_device_ops(&dev->ibdev, &c4iw_dev_ops);
545 ret = set_netdevs(&dev->ibdev, &dev->rdev);
546 if (ret)
547 goto err_dealloc_ctx;
548 dma_set_max_seg_size(&dev->rdev.lldi.pdev->dev, UINT_MAX);
549 ret = ib_register_device(&dev->ibdev, "cxgb4_%d",
550 &dev->rdev.lldi.pdev->dev);
551 if (ret)
552 goto err_dealloc_ctx;
553 return;
554
555err_dealloc_ctx:
556 pr_err("%s - Failed registering iwarp device: %d\n",
557 pci_name(ctx->lldi.pdev), ret);
558 c4iw_dealloc(ctx);
559 return;
560}
561
562void c4iw_unregister_device(struct c4iw_dev *dev)
563{
564 pr_debug("c4iw_dev %p\n", dev);
565 ib_unregister_device(&dev->ibdev);
566 return;
567}
568
