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46#include <linux/errno.h>
47#include <linux/inetdevice.h>
48#include <linux/init.h>
49#include <linux/module.h>
50#include <linux/slab.h>
51#include <rdma/ib_addr.h>
52#include <rdma/ib_smi.h>
53#include <rdma/ib_user_verbs.h>
54#include <net/addrconf.h>
55
56#include "pvrdma.h"
57
58#define DRV_NAME "vmw_pvrdma"
59#define DRV_VERSION "1.0.1.0-k"
60
61static DEFINE_MUTEX(pvrdma_device_list_lock);
62static LIST_HEAD(pvrdma_device_list);
63static struct workqueue_struct *event_wq;
64
65static int pvrdma_add_gid(const struct ib_gid_attr *attr, void **context);
66static int pvrdma_del_gid(const struct ib_gid_attr *attr, void **context);
67
68static ssize_t show_hca(struct device *device, struct device_attribute *attr,
69 char *buf)
70{
71 return sprintf(buf, "VMW_PVRDMA-%s\n", DRV_VERSION);
72}
73
74static ssize_t show_rev(struct device *device, struct device_attribute *attr,
75 char *buf)
76{
77 return sprintf(buf, "%d\n", PVRDMA_REV_ID);
78}
79
80static ssize_t show_board(struct device *device, struct device_attribute *attr,
81 char *buf)
82{
83 return sprintf(buf, "%d\n", PVRDMA_BOARD_ID);
84}
85
86static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
87static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
88static DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
89
90static struct device_attribute *pvrdma_class_attributes[] = {
91 &dev_attr_hw_rev,
92 &dev_attr_hca_type,
93 &dev_attr_board_id
94};
95
96static void pvrdma_get_fw_ver_str(struct ib_device *device, char *str)
97{
98 struct pvrdma_dev *dev =
99 container_of(device, struct pvrdma_dev, ib_dev);
100 snprintf(str, IB_FW_VERSION_NAME_MAX, "%d.%d.%d\n",
101 (int) (dev->dsr->caps.fw_ver >> 32),
102 (int) (dev->dsr->caps.fw_ver >> 16) & 0xffff,
103 (int) dev->dsr->caps.fw_ver & 0xffff);
104}
105
106static int pvrdma_init_device(struct pvrdma_dev *dev)
107{
108
109 spin_lock_init(&dev->cmd_lock);
110 sema_init(&dev->cmd_sema, 1);
111 atomic_set(&dev->num_qps, 0);
112 atomic_set(&dev->num_srqs, 0);
113 atomic_set(&dev->num_cqs, 0);
114 atomic_set(&dev->num_pds, 0);
115 atomic_set(&dev->num_ahs, 0);
116
117 return 0;
118}
119
120static int pvrdma_port_immutable(struct ib_device *ibdev, u8 port_num,
121 struct ib_port_immutable *immutable)
122{
123 struct pvrdma_dev *dev = to_vdev(ibdev);
124 struct ib_port_attr attr;
125 int err;
126
127 if (dev->dsr->caps.gid_types == PVRDMA_GID_TYPE_FLAG_ROCE_V1)
128 immutable->core_cap_flags |= RDMA_CORE_PORT_IBA_ROCE;
129 else if (dev->dsr->caps.gid_types == PVRDMA_GID_TYPE_FLAG_ROCE_V2)
130 immutable->core_cap_flags |= RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP;
131
132 err = ib_query_port(ibdev, port_num, &attr);
133 if (err)
134 return err;
135
136 immutable->pkey_tbl_len = attr.pkey_tbl_len;
137 immutable->gid_tbl_len = attr.gid_tbl_len;
138 immutable->max_mad_size = IB_MGMT_MAD_SIZE;
139 return 0;
140}
141
142static struct net_device *pvrdma_get_netdev(struct ib_device *ibdev,
143 u8 port_num)
144{
145 struct net_device *netdev;
146 struct pvrdma_dev *dev = to_vdev(ibdev);
147
148 if (port_num != 1)
149 return NULL;
150
151 rcu_read_lock();
152 netdev = dev->netdev;
153 if (netdev)
154 dev_hold(netdev);
155 rcu_read_unlock();
156
157 return netdev;
158}
159
160static int pvrdma_register_device(struct pvrdma_dev *dev)
161{
162 int ret = -1;
163 int i = 0;
164
165 strlcpy(dev->ib_dev.name, "vmw_pvrdma%d", IB_DEVICE_NAME_MAX);
166 dev->ib_dev.node_guid = dev->dsr->caps.node_guid;
167 dev->sys_image_guid = dev->dsr->caps.sys_image_guid;
168 dev->flags = 0;
169 dev->ib_dev.owner = THIS_MODULE;
170 dev->ib_dev.num_comp_vectors = 1;
171 dev->ib_dev.dev.parent = &dev->pdev->dev;
172 dev->ib_dev.uverbs_abi_ver = PVRDMA_UVERBS_ABI_VERSION;
173 dev->ib_dev.uverbs_cmd_mask =
174 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
175 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
176 (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
177 (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
178 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
179 (1ull << IB_USER_VERBS_CMD_REG_MR) |
180 (1ull << IB_USER_VERBS_CMD_DEREG_MR) |
181 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
182 (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
183 (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
184 (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
185 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
186 (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
187 (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
188 (1ull << IB_USER_VERBS_CMD_QUERY_QP) |
189 (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
190 (1ull << IB_USER_VERBS_CMD_POST_SEND) |
191 (1ull << IB_USER_VERBS_CMD_POST_RECV) |
192 (1ull << IB_USER_VERBS_CMD_CREATE_AH) |
193 (1ull << IB_USER_VERBS_CMD_DESTROY_AH);
194
195 dev->ib_dev.node_type = RDMA_NODE_IB_CA;
196 dev->ib_dev.phys_port_cnt = dev->dsr->caps.phys_port_cnt;
197
198 dev->ib_dev.query_device = pvrdma_query_device;
199 dev->ib_dev.query_port = pvrdma_query_port;
200 dev->ib_dev.query_gid = pvrdma_query_gid;
201 dev->ib_dev.query_pkey = pvrdma_query_pkey;
202 dev->ib_dev.modify_port = pvrdma_modify_port;
203 dev->ib_dev.alloc_ucontext = pvrdma_alloc_ucontext;
204 dev->ib_dev.dealloc_ucontext = pvrdma_dealloc_ucontext;
205 dev->ib_dev.mmap = pvrdma_mmap;
206 dev->ib_dev.alloc_pd = pvrdma_alloc_pd;
207 dev->ib_dev.dealloc_pd = pvrdma_dealloc_pd;
208 dev->ib_dev.create_ah = pvrdma_create_ah;
209 dev->ib_dev.destroy_ah = pvrdma_destroy_ah;
210 dev->ib_dev.create_qp = pvrdma_create_qp;
211 dev->ib_dev.modify_qp = pvrdma_modify_qp;
212 dev->ib_dev.query_qp = pvrdma_query_qp;
213 dev->ib_dev.destroy_qp = pvrdma_destroy_qp;
214 dev->ib_dev.post_send = pvrdma_post_send;
215 dev->ib_dev.post_recv = pvrdma_post_recv;
216 dev->ib_dev.create_cq = pvrdma_create_cq;
217 dev->ib_dev.destroy_cq = pvrdma_destroy_cq;
218 dev->ib_dev.poll_cq = pvrdma_poll_cq;
219 dev->ib_dev.req_notify_cq = pvrdma_req_notify_cq;
220 dev->ib_dev.get_dma_mr = pvrdma_get_dma_mr;
221 dev->ib_dev.reg_user_mr = pvrdma_reg_user_mr;
222 dev->ib_dev.dereg_mr = pvrdma_dereg_mr;
223 dev->ib_dev.alloc_mr = pvrdma_alloc_mr;
224 dev->ib_dev.map_mr_sg = pvrdma_map_mr_sg;
225 dev->ib_dev.add_gid = pvrdma_add_gid;
226 dev->ib_dev.del_gid = pvrdma_del_gid;
227 dev->ib_dev.get_netdev = pvrdma_get_netdev;
228 dev->ib_dev.get_port_immutable = pvrdma_port_immutable;
229 dev->ib_dev.get_link_layer = pvrdma_port_link_layer;
230 dev->ib_dev.get_dev_fw_str = pvrdma_get_fw_ver_str;
231
232 mutex_init(&dev->port_mutex);
233 spin_lock_init(&dev->desc_lock);
234
235 dev->cq_tbl = kcalloc(dev->dsr->caps.max_cq, sizeof(struct pvrdma_cq *),
236 GFP_KERNEL);
237 if (!dev->cq_tbl)
238 return ret;
239 spin_lock_init(&dev->cq_tbl_lock);
240
241 dev->qp_tbl = kcalloc(dev->dsr->caps.max_qp, sizeof(struct pvrdma_qp *),
242 GFP_KERNEL);
243 if (!dev->qp_tbl)
244 goto err_cq_free;
245 spin_lock_init(&dev->qp_tbl_lock);
246
247
248 if (dev->dsr->caps.max_srq) {
249 dev->ib_dev.uverbs_cmd_mask |=
250 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
251 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
252 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
253 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ) |
254 (1ull << IB_USER_VERBS_CMD_POST_SRQ_RECV);
255
256 dev->ib_dev.create_srq = pvrdma_create_srq;
257 dev->ib_dev.modify_srq = pvrdma_modify_srq;
258 dev->ib_dev.query_srq = pvrdma_query_srq;
259 dev->ib_dev.destroy_srq = pvrdma_destroy_srq;
260
261 dev->srq_tbl = kcalloc(dev->dsr->caps.max_srq,
262 sizeof(struct pvrdma_srq *),
263 GFP_KERNEL);
264 if (!dev->srq_tbl)
265 goto err_qp_free;
266 }
267 dev->ib_dev.driver_id = RDMA_DRIVER_VMW_PVRDMA;
268 spin_lock_init(&dev->srq_tbl_lock);
269
270 ret = ib_register_device(&dev->ib_dev, NULL);
271 if (ret)
272 goto err_srq_free;
273
274 for (i = 0; i < ARRAY_SIZE(pvrdma_class_attributes); ++i) {
275 ret = device_create_file(&dev->ib_dev.dev,
276 pvrdma_class_attributes[i]);
277 if (ret)
278 goto err_class;
279 }
280
281 dev->ib_active = true;
282
283 return 0;
284
285err_class:
286 ib_unregister_device(&dev->ib_dev);
287err_srq_free:
288 kfree(dev->srq_tbl);
289err_qp_free:
290 kfree(dev->qp_tbl);
291err_cq_free:
292 kfree(dev->cq_tbl);
293
294 return ret;
295}
296
297static irqreturn_t pvrdma_intr0_handler(int irq, void *dev_id)
298{
299 u32 icr = PVRDMA_INTR_CAUSE_RESPONSE;
300 struct pvrdma_dev *dev = dev_id;
301
302 dev_dbg(&dev->pdev->dev, "interrupt 0 (response) handler\n");
303
304 if (!dev->pdev->msix_enabled) {
305
306 icr = pvrdma_read_reg(dev, PVRDMA_REG_ICR);
307 if (icr == 0)
308 return IRQ_NONE;
309 }
310
311 if (icr == PVRDMA_INTR_CAUSE_RESPONSE)
312 complete(&dev->cmd_done);
313
314 return IRQ_HANDLED;
315}
316
317static void pvrdma_qp_event(struct pvrdma_dev *dev, u32 qpn, int type)
318{
319 struct pvrdma_qp *qp;
320 unsigned long flags;
321
322 spin_lock_irqsave(&dev->qp_tbl_lock, flags);
323 qp = dev->qp_tbl[qpn % dev->dsr->caps.max_qp];
324 if (qp)
325 refcount_inc(&qp->refcnt);
326 spin_unlock_irqrestore(&dev->qp_tbl_lock, flags);
327
328 if (qp && qp->ibqp.event_handler) {
329 struct ib_qp *ibqp = &qp->ibqp;
330 struct ib_event e;
331
332 e.device = ibqp->device;
333 e.element.qp = ibqp;
334 e.event = type;
335 ibqp->event_handler(&e, ibqp->qp_context);
336 }
337 if (qp) {
338 if (refcount_dec_and_test(&qp->refcnt))
339 complete(&qp->free);
340 }
341}
342
343static void pvrdma_cq_event(struct pvrdma_dev *dev, u32 cqn, int type)
344{
345 struct pvrdma_cq *cq;
346 unsigned long flags;
347
348 spin_lock_irqsave(&dev->cq_tbl_lock, flags);
349 cq = dev->cq_tbl[cqn % dev->dsr->caps.max_cq];
350 if (cq)
351 refcount_inc(&cq->refcnt);
352 spin_unlock_irqrestore(&dev->cq_tbl_lock, flags);
353
354 if (cq && cq->ibcq.event_handler) {
355 struct ib_cq *ibcq = &cq->ibcq;
356 struct ib_event e;
357
358 e.device = ibcq->device;
359 e.element.cq = ibcq;
360 e.event = type;
361 ibcq->event_handler(&e, ibcq->cq_context);
362 }
363 if (cq) {
364 if (refcount_dec_and_test(&cq->refcnt))
365 complete(&cq->free);
366 }
367}
368
369static void pvrdma_srq_event(struct pvrdma_dev *dev, u32 srqn, int type)
370{
371 struct pvrdma_srq *srq;
372 unsigned long flags;
373
374 spin_lock_irqsave(&dev->srq_tbl_lock, flags);
375 if (dev->srq_tbl)
376 srq = dev->srq_tbl[srqn % dev->dsr->caps.max_srq];
377 else
378 srq = NULL;
379 if (srq)
380 refcount_inc(&srq->refcnt);
381 spin_unlock_irqrestore(&dev->srq_tbl_lock, flags);
382
383 if (srq && srq->ibsrq.event_handler) {
384 struct ib_srq *ibsrq = &srq->ibsrq;
385 struct ib_event e;
386
387 e.device = ibsrq->device;
388 e.element.srq = ibsrq;
389 e.event = type;
390 ibsrq->event_handler(&e, ibsrq->srq_context);
391 }
392 if (srq) {
393 if (refcount_dec_and_test(&srq->refcnt))
394 complete(&srq->free);
395 }
396}
397
398static void pvrdma_dispatch_event(struct pvrdma_dev *dev, int port,
399 enum ib_event_type event)
400{
401 struct ib_event ib_event;
402
403 memset(&ib_event, 0, sizeof(ib_event));
404 ib_event.device = &dev->ib_dev;
405 ib_event.element.port_num = port;
406 ib_event.event = event;
407 ib_dispatch_event(&ib_event);
408}
409
410static void pvrdma_dev_event(struct pvrdma_dev *dev, u8 port, int type)
411{
412 if (port < 1 || port > dev->dsr->caps.phys_port_cnt) {
413 dev_warn(&dev->pdev->dev, "event on port %d\n", port);
414 return;
415 }
416
417 pvrdma_dispatch_event(dev, port, type);
418}
419
420static inline struct pvrdma_eqe *get_eqe(struct pvrdma_dev *dev, unsigned int i)
421{
422 return (struct pvrdma_eqe *)pvrdma_page_dir_get_ptr(
423 &dev->async_pdir,
424 PAGE_SIZE +
425 sizeof(struct pvrdma_eqe) * i);
426}
427
428static irqreturn_t pvrdma_intr1_handler(int irq, void *dev_id)
429{
430 struct pvrdma_dev *dev = dev_id;
431 struct pvrdma_ring *ring = &dev->async_ring_state->rx;
432 int ring_slots = (dev->dsr->async_ring_pages.num_pages - 1) *
433 PAGE_SIZE / sizeof(struct pvrdma_eqe);
434 unsigned int head;
435
436 dev_dbg(&dev->pdev->dev, "interrupt 1 (async event) handler\n");
437
438
439
440
441
442 if (!dev->ib_active)
443 return IRQ_HANDLED;
444
445 while (pvrdma_idx_ring_has_data(ring, ring_slots, &head) > 0) {
446 struct pvrdma_eqe *eqe;
447
448 eqe = get_eqe(dev, head);
449
450 switch (eqe->type) {
451 case PVRDMA_EVENT_QP_FATAL:
452 case PVRDMA_EVENT_QP_REQ_ERR:
453 case PVRDMA_EVENT_QP_ACCESS_ERR:
454 case PVRDMA_EVENT_COMM_EST:
455 case PVRDMA_EVENT_SQ_DRAINED:
456 case PVRDMA_EVENT_PATH_MIG:
457 case PVRDMA_EVENT_PATH_MIG_ERR:
458 case PVRDMA_EVENT_QP_LAST_WQE_REACHED:
459 pvrdma_qp_event(dev, eqe->info, eqe->type);
460 break;
461
462 case PVRDMA_EVENT_CQ_ERR:
463 pvrdma_cq_event(dev, eqe->info, eqe->type);
464 break;
465
466 case PVRDMA_EVENT_SRQ_ERR:
467 case PVRDMA_EVENT_SRQ_LIMIT_REACHED:
468 pvrdma_srq_event(dev, eqe->info, eqe->type);
469 break;
470
471 case PVRDMA_EVENT_PORT_ACTIVE:
472 case PVRDMA_EVENT_PORT_ERR:
473 case PVRDMA_EVENT_LID_CHANGE:
474 case PVRDMA_EVENT_PKEY_CHANGE:
475 case PVRDMA_EVENT_SM_CHANGE:
476 case PVRDMA_EVENT_CLIENT_REREGISTER:
477 case PVRDMA_EVENT_GID_CHANGE:
478 pvrdma_dev_event(dev, eqe->info, eqe->type);
479 break;
480
481 case PVRDMA_EVENT_DEVICE_FATAL:
482 pvrdma_dev_event(dev, 1, eqe->type);
483 break;
484
485 default:
486 break;
487 }
488
489 pvrdma_idx_ring_inc(&ring->cons_head, ring_slots);
490 }
491
492 return IRQ_HANDLED;
493}
494
495static inline struct pvrdma_cqne *get_cqne(struct pvrdma_dev *dev,
496 unsigned int i)
497{
498 return (struct pvrdma_cqne *)pvrdma_page_dir_get_ptr(
499 &dev->cq_pdir,
500 PAGE_SIZE +
501 sizeof(struct pvrdma_cqne) * i);
502}
503
504static irqreturn_t pvrdma_intrx_handler(int irq, void *dev_id)
505{
506 struct pvrdma_dev *dev = dev_id;
507 struct pvrdma_ring *ring = &dev->cq_ring_state->rx;
508 int ring_slots = (dev->dsr->cq_ring_pages.num_pages - 1) * PAGE_SIZE /
509 sizeof(struct pvrdma_cqne);
510 unsigned int head;
511 unsigned long flags;
512
513 dev_dbg(&dev->pdev->dev, "interrupt x (completion) handler\n");
514
515 while (pvrdma_idx_ring_has_data(ring, ring_slots, &head) > 0) {
516 struct pvrdma_cqne *cqne;
517 struct pvrdma_cq *cq;
518
519 cqne = get_cqne(dev, head);
520 spin_lock_irqsave(&dev->cq_tbl_lock, flags);
521 cq = dev->cq_tbl[cqne->info % dev->dsr->caps.max_cq];
522 if (cq)
523 refcount_inc(&cq->refcnt);
524 spin_unlock_irqrestore(&dev->cq_tbl_lock, flags);
525
526 if (cq && cq->ibcq.comp_handler)
527 cq->ibcq.comp_handler(&cq->ibcq, cq->ibcq.cq_context);
528 if (cq) {
529 if (refcount_dec_and_test(&cq->refcnt))
530 complete(&cq->free);
531 }
532 pvrdma_idx_ring_inc(&ring->cons_head, ring_slots);
533 }
534
535 return IRQ_HANDLED;
536}
537
538static void pvrdma_free_irq(struct pvrdma_dev *dev)
539{
540 int i;
541
542 dev_dbg(&dev->pdev->dev, "freeing interrupts\n");
543 for (i = 0; i < dev->nr_vectors; i++)
544 free_irq(pci_irq_vector(dev->pdev, i), dev);
545}
546
547static void pvrdma_enable_intrs(struct pvrdma_dev *dev)
548{
549 dev_dbg(&dev->pdev->dev, "enable interrupts\n");
550 pvrdma_write_reg(dev, PVRDMA_REG_IMR, 0);
551}
552
553static void pvrdma_disable_intrs(struct pvrdma_dev *dev)
554{
555 dev_dbg(&dev->pdev->dev, "disable interrupts\n");
556 pvrdma_write_reg(dev, PVRDMA_REG_IMR, ~0);
557}
558
559static int pvrdma_alloc_intrs(struct pvrdma_dev *dev)
560{
561 struct pci_dev *pdev = dev->pdev;
562 int ret = 0, i;
563
564 ret = pci_alloc_irq_vectors(pdev, 1, PVRDMA_MAX_INTERRUPTS,
565 PCI_IRQ_MSIX);
566 if (ret < 0) {
567 ret = pci_alloc_irq_vectors(pdev, 1, 1,
568 PCI_IRQ_MSI | PCI_IRQ_LEGACY);
569 if (ret < 0)
570 return ret;
571 }
572 dev->nr_vectors = ret;
573
574 ret = request_irq(pci_irq_vector(dev->pdev, 0), pvrdma_intr0_handler,
575 pdev->msix_enabled ? 0 : IRQF_SHARED, DRV_NAME, dev);
576 if (ret) {
577 dev_err(&dev->pdev->dev,
578 "failed to request interrupt 0\n");
579 goto out_free_vectors;
580 }
581
582 for (i = 1; i < dev->nr_vectors; i++) {
583 ret = request_irq(pci_irq_vector(dev->pdev, i),
584 i == 1 ? pvrdma_intr1_handler :
585 pvrdma_intrx_handler,
586 0, DRV_NAME, dev);
587 if (ret) {
588 dev_err(&dev->pdev->dev,
589 "failed to request interrupt %d\n", i);
590 goto free_irqs;
591 }
592 }
593
594 return 0;
595
596free_irqs:
597 while (--i >= 0)
598 free_irq(pci_irq_vector(dev->pdev, i), dev);
599out_free_vectors:
600 pci_free_irq_vectors(pdev);
601 return ret;
602}
603
604static void pvrdma_free_slots(struct pvrdma_dev *dev)
605{
606 struct pci_dev *pdev = dev->pdev;
607
608 if (dev->resp_slot)
609 dma_free_coherent(&pdev->dev, PAGE_SIZE, dev->resp_slot,
610 dev->dsr->resp_slot_dma);
611 if (dev->cmd_slot)
612 dma_free_coherent(&pdev->dev, PAGE_SIZE, dev->cmd_slot,
613 dev->dsr->cmd_slot_dma);
614}
615
616static int pvrdma_add_gid_at_index(struct pvrdma_dev *dev,
617 const union ib_gid *gid,
618 u8 gid_type,
619 int index)
620{
621 int ret;
622 union pvrdma_cmd_req req;
623 struct pvrdma_cmd_create_bind *cmd_bind = &req.create_bind;
624
625 if (!dev->sgid_tbl) {
626 dev_warn(&dev->pdev->dev, "sgid table not initialized\n");
627 return -EINVAL;
628 }
629
630 memset(cmd_bind, 0, sizeof(*cmd_bind));
631 cmd_bind->hdr.cmd = PVRDMA_CMD_CREATE_BIND;
632 memcpy(cmd_bind->new_gid, gid->raw, 16);
633 cmd_bind->mtu = ib_mtu_enum_to_int(IB_MTU_1024);
634 cmd_bind->vlan = 0xfff;
635 cmd_bind->index = index;
636 cmd_bind->gid_type = gid_type;
637
638 ret = pvrdma_cmd_post(dev, &req, NULL, 0);
639 if (ret < 0) {
640 dev_warn(&dev->pdev->dev,
641 "could not create binding, error: %d\n", ret);
642 return -EFAULT;
643 }
644 memcpy(&dev->sgid_tbl[index], gid, sizeof(*gid));
645 return 0;
646}
647
648static int pvrdma_add_gid(const struct ib_gid_attr *attr, void **context)
649{
650 struct pvrdma_dev *dev = to_vdev(attr->device);
651
652 return pvrdma_add_gid_at_index(dev, &attr->gid,
653 ib_gid_type_to_pvrdma(attr->gid_type),
654 attr->index);
655}
656
657static int pvrdma_del_gid_at_index(struct pvrdma_dev *dev, int index)
658{
659 int ret;
660 union pvrdma_cmd_req req;
661 struct pvrdma_cmd_destroy_bind *cmd_dest = &req.destroy_bind;
662
663
664 if (!dev->sgid_tbl) {
665 dev_warn(&dev->pdev->dev, "sgid table not initialized\n");
666 return -EINVAL;
667 }
668
669 memset(cmd_dest, 0, sizeof(*cmd_dest));
670 cmd_dest->hdr.cmd = PVRDMA_CMD_DESTROY_BIND;
671 memcpy(cmd_dest->dest_gid, &dev->sgid_tbl[index], 16);
672 cmd_dest->index = index;
673
674 ret = pvrdma_cmd_post(dev, &req, NULL, 0);
675 if (ret < 0) {
676 dev_warn(&dev->pdev->dev,
677 "could not destroy binding, error: %d\n", ret);
678 return ret;
679 }
680 memset(&dev->sgid_tbl[index], 0, 16);
681 return 0;
682}
683
684static int pvrdma_del_gid(const struct ib_gid_attr *attr, void **context)
685{
686 struct pvrdma_dev *dev = to_vdev(attr->device);
687
688 dev_dbg(&dev->pdev->dev, "removing gid at index %u from %s",
689 attr->index, dev->netdev->name);
690
691 return pvrdma_del_gid_at_index(dev, attr->index);
692}
693
694static void pvrdma_netdevice_event_handle(struct pvrdma_dev *dev,
695 struct net_device *ndev,
696 unsigned long event)
697{
698 struct pci_dev *pdev_net;
699 unsigned int slot;
700
701 switch (event) {
702 case NETDEV_REBOOT:
703 case NETDEV_DOWN:
704 pvrdma_dispatch_event(dev, 1, IB_EVENT_PORT_ERR);
705 break;
706 case NETDEV_UP:
707 pvrdma_write_reg(dev, PVRDMA_REG_CTL,
708 PVRDMA_DEVICE_CTL_UNQUIESCE);
709
710 mb();
711
712 if (pvrdma_read_reg(dev, PVRDMA_REG_ERR))
713 dev_err(&dev->pdev->dev,
714 "failed to activate device during link up\n");
715 else
716 pvrdma_dispatch_event(dev, 1, IB_EVENT_PORT_ACTIVE);
717 break;
718 case NETDEV_UNREGISTER:
719 dev_put(dev->netdev);
720 dev->netdev = NULL;
721 break;
722 case NETDEV_REGISTER:
723
724 slot = PCI_SLOT(dev->pdev->devfn);
725 pdev_net = pci_get_slot(dev->pdev->bus,
726 PCI_DEVFN(slot, 0));
727 if ((dev->netdev == NULL) &&
728 (pci_get_drvdata(pdev_net) == ndev)) {
729
730 dev->netdev = ndev;
731 dev_hold(ndev);
732 }
733 pci_dev_put(pdev_net);
734 break;
735
736 default:
737 dev_dbg(&dev->pdev->dev, "ignore netdevice event %ld on %s\n",
738 event, dev->ib_dev.name);
739 break;
740 }
741}
742
743static void pvrdma_netdevice_event_work(struct work_struct *work)
744{
745 struct pvrdma_netdevice_work *netdev_work;
746 struct pvrdma_dev *dev;
747
748 netdev_work = container_of(work, struct pvrdma_netdevice_work, work);
749
750 mutex_lock(&pvrdma_device_list_lock);
751 list_for_each_entry(dev, &pvrdma_device_list, device_link) {
752 if ((netdev_work->event == NETDEV_REGISTER) ||
753 (dev->netdev == netdev_work->event_netdev)) {
754 pvrdma_netdevice_event_handle(dev,
755 netdev_work->event_netdev,
756 netdev_work->event);
757 break;
758 }
759 }
760 mutex_unlock(&pvrdma_device_list_lock);
761
762 kfree(netdev_work);
763}
764
765static int pvrdma_netdevice_event(struct notifier_block *this,
766 unsigned long event, void *ptr)
767{
768 struct net_device *event_netdev = netdev_notifier_info_to_dev(ptr);
769 struct pvrdma_netdevice_work *netdev_work;
770
771 netdev_work = kmalloc(sizeof(*netdev_work), GFP_ATOMIC);
772 if (!netdev_work)
773 return NOTIFY_BAD;
774
775 INIT_WORK(&netdev_work->work, pvrdma_netdevice_event_work);
776 netdev_work->event_netdev = event_netdev;
777 netdev_work->event = event;
778 queue_work(event_wq, &netdev_work->work);
779
780 return NOTIFY_DONE;
781}
782
783static int pvrdma_pci_probe(struct pci_dev *pdev,
784 const struct pci_device_id *id)
785{
786 struct pci_dev *pdev_net;
787 struct pvrdma_dev *dev;
788 int ret;
789 unsigned long start;
790 unsigned long len;
791 dma_addr_t slot_dma = 0;
792
793 dev_dbg(&pdev->dev, "initializing driver %s\n", pci_name(pdev));
794
795
796 dev = (struct pvrdma_dev *)ib_alloc_device(sizeof(*dev));
797 if (!dev) {
798 dev_err(&pdev->dev, "failed to allocate IB device\n");
799 return -ENOMEM;
800 }
801
802 mutex_lock(&pvrdma_device_list_lock);
803 list_add(&dev->device_link, &pvrdma_device_list);
804 mutex_unlock(&pvrdma_device_list_lock);
805
806 ret = pvrdma_init_device(dev);
807 if (ret)
808 goto err_free_device;
809
810 dev->pdev = pdev;
811 pci_set_drvdata(pdev, dev);
812
813 ret = pci_enable_device(pdev);
814 if (ret) {
815 dev_err(&pdev->dev, "cannot enable PCI device\n");
816 goto err_free_device;
817 }
818
819 dev_dbg(&pdev->dev, "PCI resource flags BAR0 %#lx\n",
820 pci_resource_flags(pdev, 0));
821 dev_dbg(&pdev->dev, "PCI resource len %#llx\n",
822 (unsigned long long)pci_resource_len(pdev, 0));
823 dev_dbg(&pdev->dev, "PCI resource start %#llx\n",
824 (unsigned long long)pci_resource_start(pdev, 0));
825 dev_dbg(&pdev->dev, "PCI resource flags BAR1 %#lx\n",
826 pci_resource_flags(pdev, 1));
827 dev_dbg(&pdev->dev, "PCI resource len %#llx\n",
828 (unsigned long long)pci_resource_len(pdev, 1));
829 dev_dbg(&pdev->dev, "PCI resource start %#llx\n",
830 (unsigned long long)pci_resource_start(pdev, 1));
831
832 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM) ||
833 !(pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
834 dev_err(&pdev->dev, "PCI BAR region not MMIO\n");
835 ret = -ENOMEM;
836 goto err_free_device;
837 }
838
839 ret = pci_request_regions(pdev, DRV_NAME);
840 if (ret) {
841 dev_err(&pdev->dev, "cannot request PCI resources\n");
842 goto err_disable_pdev;
843 }
844
845
846 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) == 0) {
847 ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
848 if (ret != 0) {
849 dev_err(&pdev->dev,
850 "pci_set_consistent_dma_mask failed\n");
851 goto err_free_resource;
852 }
853 } else {
854 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
855 if (ret != 0) {
856 dev_err(&pdev->dev,
857 "pci_set_dma_mask failed\n");
858 goto err_free_resource;
859 }
860 }
861
862 pci_set_master(pdev);
863
864
865 start = pci_resource_start(dev->pdev, PVRDMA_PCI_RESOURCE_REG);
866 len = pci_resource_len(dev->pdev, PVRDMA_PCI_RESOURCE_REG);
867 dev->regs = ioremap(start, len);
868 if (!dev->regs) {
869 dev_err(&pdev->dev, "register mapping failed\n");
870 ret = -ENOMEM;
871 goto err_free_resource;
872 }
873
874
875 dev->driver_uar.index = 0;
876 dev->driver_uar.pfn =
877 pci_resource_start(dev->pdev, PVRDMA_PCI_RESOURCE_UAR) >>
878 PAGE_SHIFT;
879 dev->driver_uar.map =
880 ioremap(dev->driver_uar.pfn << PAGE_SHIFT, PAGE_SIZE);
881 if (!dev->driver_uar.map) {
882 dev_err(&pdev->dev, "failed to remap UAR pages\n");
883 ret = -ENOMEM;
884 goto err_unmap_regs;
885 }
886
887 dev->dsr_version = pvrdma_read_reg(dev, PVRDMA_REG_VERSION);
888 dev_info(&pdev->dev, "device version %d, driver version %d\n",
889 dev->dsr_version, PVRDMA_VERSION);
890
891 dev->dsr = dma_zalloc_coherent(&pdev->dev, sizeof(*dev->dsr),
892 &dev->dsrbase, GFP_KERNEL);
893 if (!dev->dsr) {
894 dev_err(&pdev->dev, "failed to allocate shared region\n");
895 ret = -ENOMEM;
896 goto err_uar_unmap;
897 }
898
899
900 dev->dsr->driver_version = PVRDMA_VERSION;
901 dev->dsr->gos_info.gos_bits = sizeof(void *) == 4 ?
902 PVRDMA_GOS_BITS_32 :
903 PVRDMA_GOS_BITS_64;
904 dev->dsr->gos_info.gos_type = PVRDMA_GOS_TYPE_LINUX;
905 dev->dsr->gos_info.gos_ver = 1;
906 dev->dsr->uar_pfn = dev->driver_uar.pfn;
907
908
909 dev->cmd_slot = dma_alloc_coherent(&pdev->dev, PAGE_SIZE,
910 &slot_dma, GFP_KERNEL);
911 if (!dev->cmd_slot) {
912 ret = -ENOMEM;
913 goto err_free_dsr;
914 }
915
916 dev->dsr->cmd_slot_dma = (u64)slot_dma;
917
918
919 dev->resp_slot = dma_alloc_coherent(&pdev->dev, PAGE_SIZE,
920 &slot_dma, GFP_KERNEL);
921 if (!dev->resp_slot) {
922 ret = -ENOMEM;
923 goto err_free_slots;
924 }
925
926 dev->dsr->resp_slot_dma = (u64)slot_dma;
927
928
929 dev->dsr->async_ring_pages.num_pages = PVRDMA_NUM_RING_PAGES;
930 ret = pvrdma_page_dir_init(dev, &dev->async_pdir,
931 dev->dsr->async_ring_pages.num_pages, true);
932 if (ret)
933 goto err_free_slots;
934 dev->async_ring_state = dev->async_pdir.pages[0];
935 dev->dsr->async_ring_pages.pdir_dma = dev->async_pdir.dir_dma;
936
937
938 dev->dsr->cq_ring_pages.num_pages = PVRDMA_NUM_RING_PAGES;
939 ret = pvrdma_page_dir_init(dev, &dev->cq_pdir,
940 dev->dsr->cq_ring_pages.num_pages, true);
941 if (ret)
942 goto err_free_async_ring;
943 dev->cq_ring_state = dev->cq_pdir.pages[0];
944 dev->dsr->cq_ring_pages.pdir_dma = dev->cq_pdir.dir_dma;
945
946
947
948
949
950
951
952 pvrdma_write_reg(dev, PVRDMA_REG_DSRLOW, (u32)dev->dsrbase);
953 pvrdma_write_reg(dev, PVRDMA_REG_DSRHIGH,
954 (u32)((u64)(dev->dsrbase) >> 32));
955
956
957 mb();
958
959
960 if (!PVRDMA_SUPPORTED(dev)) {
961 dev_err(&pdev->dev, "driver needs RoCE v1 or v2 support\n");
962 ret = -EFAULT;
963 goto err_free_cq_ring;
964 }
965
966
967 pdev_net = pci_get_slot(pdev->bus, PCI_DEVFN(PCI_SLOT(pdev->devfn), 0));
968 if (!pdev_net) {
969 dev_err(&pdev->dev, "failed to find paired net device\n");
970 ret = -ENODEV;
971 goto err_free_cq_ring;
972 }
973
974 if (pdev_net->vendor != PCI_VENDOR_ID_VMWARE ||
975 pdev_net->device != PCI_DEVICE_ID_VMWARE_VMXNET3) {
976 dev_err(&pdev->dev, "failed to find paired vmxnet3 device\n");
977 pci_dev_put(pdev_net);
978 ret = -ENODEV;
979 goto err_free_cq_ring;
980 }
981
982 dev->netdev = pci_get_drvdata(pdev_net);
983 pci_dev_put(pdev_net);
984 if (!dev->netdev) {
985 dev_err(&pdev->dev, "failed to get vmxnet3 device\n");
986 ret = -ENODEV;
987 goto err_free_cq_ring;
988 }
989 dev_hold(dev->netdev);
990
991 dev_info(&pdev->dev, "paired device to %s\n", dev->netdev->name);
992
993
994 ret = pvrdma_alloc_intrs(dev);
995 if (ret) {
996 dev_err(&pdev->dev, "failed to allocate interrupts\n");
997 ret = -ENOMEM;
998 goto err_free_cq_ring;
999 }
1000
1001
1002 ret = pvrdma_uar_table_init(dev);
1003 if (ret) {
1004 dev_err(&pdev->dev, "failed to allocate UAR table\n");
1005 ret = -ENOMEM;
1006 goto err_free_intrs;
1007 }
1008
1009
1010 dev->sgid_tbl = kcalloc(dev->dsr->caps.gid_tbl_len,
1011 sizeof(union ib_gid), GFP_KERNEL);
1012 if (!dev->sgid_tbl) {
1013 ret = -ENOMEM;
1014 goto err_free_uar_table;
1015 }
1016 dev_dbg(&pdev->dev, "gid table len %d\n", dev->dsr->caps.gid_tbl_len);
1017
1018 pvrdma_enable_intrs(dev);
1019
1020
1021 pvrdma_write_reg(dev, PVRDMA_REG_CTL, PVRDMA_DEVICE_CTL_ACTIVATE);
1022
1023
1024 mb();
1025
1026
1027 ret = pvrdma_read_reg(dev, PVRDMA_REG_ERR);
1028 if (ret != 0) {
1029 dev_err(&pdev->dev, "failed to activate device\n");
1030 ret = -EFAULT;
1031 goto err_disable_intr;
1032 }
1033
1034
1035 ret = pvrdma_register_device(dev);
1036 if (ret) {
1037 dev_err(&pdev->dev, "failed to register IB device\n");
1038 goto err_disable_intr;
1039 }
1040
1041 dev->nb_netdev.notifier_call = pvrdma_netdevice_event;
1042 ret = register_netdevice_notifier(&dev->nb_netdev);
1043 if (ret) {
1044 dev_err(&pdev->dev, "failed to register netdevice events\n");
1045 goto err_unreg_ibdev;
1046 }
1047
1048 dev_info(&pdev->dev, "attached to device\n");
1049 return 0;
1050
1051err_unreg_ibdev:
1052 ib_unregister_device(&dev->ib_dev);
1053err_disable_intr:
1054 pvrdma_disable_intrs(dev);
1055 kfree(dev->sgid_tbl);
1056err_free_uar_table:
1057 pvrdma_uar_table_cleanup(dev);
1058err_free_intrs:
1059 pvrdma_free_irq(dev);
1060 pci_free_irq_vectors(pdev);
1061err_free_cq_ring:
1062 if (dev->netdev) {
1063 dev_put(dev->netdev);
1064 dev->netdev = NULL;
1065 }
1066 pvrdma_page_dir_cleanup(dev, &dev->cq_pdir);
1067err_free_async_ring:
1068 pvrdma_page_dir_cleanup(dev, &dev->async_pdir);
1069err_free_slots:
1070 pvrdma_free_slots(dev);
1071err_free_dsr:
1072 dma_free_coherent(&pdev->dev, sizeof(*dev->dsr), dev->dsr,
1073 dev->dsrbase);
1074err_uar_unmap:
1075 iounmap(dev->driver_uar.map);
1076err_unmap_regs:
1077 iounmap(dev->regs);
1078err_free_resource:
1079 pci_release_regions(pdev);
1080err_disable_pdev:
1081 pci_disable_device(pdev);
1082 pci_set_drvdata(pdev, NULL);
1083err_free_device:
1084 mutex_lock(&pvrdma_device_list_lock);
1085 list_del(&dev->device_link);
1086 mutex_unlock(&pvrdma_device_list_lock);
1087 ib_dealloc_device(&dev->ib_dev);
1088 return ret;
1089}
1090
1091static void pvrdma_pci_remove(struct pci_dev *pdev)
1092{
1093 struct pvrdma_dev *dev = pci_get_drvdata(pdev);
1094
1095 if (!dev)
1096 return;
1097
1098 dev_info(&pdev->dev, "detaching from device\n");
1099
1100 unregister_netdevice_notifier(&dev->nb_netdev);
1101 dev->nb_netdev.notifier_call = NULL;
1102
1103 flush_workqueue(event_wq);
1104
1105 if (dev->netdev) {
1106 dev_put(dev->netdev);
1107 dev->netdev = NULL;
1108 }
1109
1110
1111 ib_unregister_device(&dev->ib_dev);
1112
1113 mutex_lock(&pvrdma_device_list_lock);
1114 list_del(&dev->device_link);
1115 mutex_unlock(&pvrdma_device_list_lock);
1116
1117 pvrdma_disable_intrs(dev);
1118 pvrdma_free_irq(dev);
1119 pci_free_irq_vectors(pdev);
1120
1121
1122 pvrdma_write_reg(dev, PVRDMA_REG_CTL, PVRDMA_DEVICE_CTL_RESET);
1123 pvrdma_page_dir_cleanup(dev, &dev->cq_pdir);
1124 pvrdma_page_dir_cleanup(dev, &dev->async_pdir);
1125 pvrdma_free_slots(dev);
1126
1127 iounmap(dev->regs);
1128 kfree(dev->sgid_tbl);
1129 kfree(dev->cq_tbl);
1130 kfree(dev->srq_tbl);
1131 kfree(dev->qp_tbl);
1132 pvrdma_uar_table_cleanup(dev);
1133 iounmap(dev->driver_uar.map);
1134
1135 ib_dealloc_device(&dev->ib_dev);
1136
1137
1138 pci_release_regions(pdev);
1139 pci_disable_device(pdev);
1140 pci_set_drvdata(pdev, NULL);
1141}
1142
1143static const struct pci_device_id pvrdma_pci_table[] = {
1144 { PCI_DEVICE(PCI_VENDOR_ID_VMWARE, PCI_DEVICE_ID_VMWARE_PVRDMA), },
1145 { 0 },
1146};
1147
1148MODULE_DEVICE_TABLE(pci, pvrdma_pci_table);
1149
1150static struct pci_driver pvrdma_driver = {
1151 .name = DRV_NAME,
1152 .id_table = pvrdma_pci_table,
1153 .probe = pvrdma_pci_probe,
1154 .remove = pvrdma_pci_remove,
1155};
1156
1157static int __init pvrdma_init(void)
1158{
1159 int err;
1160
1161 event_wq = alloc_ordered_workqueue("pvrdma_event_wq", WQ_MEM_RECLAIM);
1162 if (!event_wq)
1163 return -ENOMEM;
1164
1165 err = pci_register_driver(&pvrdma_driver);
1166 if (err)
1167 destroy_workqueue(event_wq);
1168
1169 return err;
1170}
1171
1172static void __exit pvrdma_cleanup(void)
1173{
1174 pci_unregister_driver(&pvrdma_driver);
1175
1176 destroy_workqueue(event_wq);
1177}
1178
1179module_init(pvrdma_init);
1180module_exit(pvrdma_cleanup);
1181
1182MODULE_AUTHOR("VMware, Inc");
1183MODULE_DESCRIPTION("VMware Paravirtual RDMA driver");
1184MODULE_LICENSE("Dual BSD/GPL");
1185
