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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 hca_type_show(struct device *device,
69 struct device_attribute *attr, char *buf)
70{
71 return sysfs_emit(buf, "VMW_PVRDMA-%s\n", DRV_VERSION);
72}
73static DEVICE_ATTR_RO(hca_type);
74
75static ssize_t hw_rev_show(struct device *device,
76 struct device_attribute *attr, char *buf)
77{
78 return sysfs_emit(buf, "%d\n", PVRDMA_REV_ID);
79}
80static DEVICE_ATTR_RO(hw_rev);
81
82static ssize_t board_id_show(struct device *device,
83 struct device_attribute *attr, char *buf)
84{
85 return sysfs_emit(buf, "%d\n", PVRDMA_BOARD_ID);
86}
87static DEVICE_ATTR_RO(board_id);
88
89static struct attribute *pvrdma_class_attributes[] = {
90 &dev_attr_hw_rev.attr,
91 &dev_attr_hca_type.attr,
92 &dev_attr_board_id.attr,
93 NULL,
94};
95
96static const struct attribute_group pvrdma_attr_group = {
97 .attrs = pvrdma_class_attributes,
98};
99
100static void pvrdma_get_fw_ver_str(struct ib_device *device, char *str)
101{
102 struct pvrdma_dev *dev =
103 container_of(device, struct pvrdma_dev, ib_dev);
104 snprintf(str, IB_FW_VERSION_NAME_MAX, "%d.%d.%d\n",
105 (int) (dev->dsr->caps.fw_ver >> 32),
106 (int) (dev->dsr->caps.fw_ver >> 16) & 0xffff,
107 (int) dev->dsr->caps.fw_ver & 0xffff);
108}
109
110static int pvrdma_init_device(struct pvrdma_dev *dev)
111{
112
113 spin_lock_init(&dev->cmd_lock);
114 sema_init(&dev->cmd_sema, 1);
115 atomic_set(&dev->num_qps, 0);
116 atomic_set(&dev->num_srqs, 0);
117 atomic_set(&dev->num_cqs, 0);
118 atomic_set(&dev->num_pds, 0);
119 atomic_set(&dev->num_ahs, 0);
120
121 return 0;
122}
123
124static int pvrdma_port_immutable(struct ib_device *ibdev, u32 port_num,
125 struct ib_port_immutable *immutable)
126{
127 struct pvrdma_dev *dev = to_vdev(ibdev);
128 struct ib_port_attr attr;
129 int err;
130
131 if (dev->dsr->caps.gid_types == PVRDMA_GID_TYPE_FLAG_ROCE_V1)
132 immutable->core_cap_flags |= RDMA_CORE_PORT_IBA_ROCE;
133 else if (dev->dsr->caps.gid_types == PVRDMA_GID_TYPE_FLAG_ROCE_V2)
134 immutable->core_cap_flags |= RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP;
135
136 err = ib_query_port(ibdev, port_num, &attr);
137 if (err)
138 return err;
139
140 immutable->pkey_tbl_len = attr.pkey_tbl_len;
141 immutable->gid_tbl_len = attr.gid_tbl_len;
142 immutable->max_mad_size = IB_MGMT_MAD_SIZE;
143 return 0;
144}
145
146static const struct ib_device_ops pvrdma_dev_ops = {
147 .owner = THIS_MODULE,
148 .driver_id = RDMA_DRIVER_VMW_PVRDMA,
149 .uverbs_abi_ver = PVRDMA_UVERBS_ABI_VERSION,
150
151 .add_gid = pvrdma_add_gid,
152 .alloc_mr = pvrdma_alloc_mr,
153 .alloc_pd = pvrdma_alloc_pd,
154 .alloc_ucontext = pvrdma_alloc_ucontext,
155 .create_ah = pvrdma_create_ah,
156 .create_cq = pvrdma_create_cq,
157 .create_qp = pvrdma_create_qp,
158 .dealloc_pd = pvrdma_dealloc_pd,
159 .dealloc_ucontext = pvrdma_dealloc_ucontext,
160 .del_gid = pvrdma_del_gid,
161 .dereg_mr = pvrdma_dereg_mr,
162 .destroy_ah = pvrdma_destroy_ah,
163 .destroy_cq = pvrdma_destroy_cq,
164 .destroy_qp = pvrdma_destroy_qp,
165 .device_group = &pvrdma_attr_group,
166 .get_dev_fw_str = pvrdma_get_fw_ver_str,
167 .get_dma_mr = pvrdma_get_dma_mr,
168 .get_link_layer = pvrdma_port_link_layer,
169 .get_port_immutable = pvrdma_port_immutable,
170 .map_mr_sg = pvrdma_map_mr_sg,
171 .mmap = pvrdma_mmap,
172 .modify_port = pvrdma_modify_port,
173 .modify_qp = pvrdma_modify_qp,
174 .poll_cq = pvrdma_poll_cq,
175 .post_recv = pvrdma_post_recv,
176 .post_send = pvrdma_post_send,
177 .query_device = pvrdma_query_device,
178 .query_gid = pvrdma_query_gid,
179 .query_pkey = pvrdma_query_pkey,
180 .query_port = pvrdma_query_port,
181 .query_qp = pvrdma_query_qp,
182 .reg_user_mr = pvrdma_reg_user_mr,
183 .req_notify_cq = pvrdma_req_notify_cq,
184
185 INIT_RDMA_OBJ_SIZE(ib_ah, pvrdma_ah, ibah),
186 INIT_RDMA_OBJ_SIZE(ib_cq, pvrdma_cq, ibcq),
187 INIT_RDMA_OBJ_SIZE(ib_pd, pvrdma_pd, ibpd),
188 INIT_RDMA_OBJ_SIZE(ib_qp, pvrdma_qp, ibqp),
189 INIT_RDMA_OBJ_SIZE(ib_ucontext, pvrdma_ucontext, ibucontext),
190};
191
192static const struct ib_device_ops pvrdma_dev_srq_ops = {
193 .create_srq = pvrdma_create_srq,
194 .destroy_srq = pvrdma_destroy_srq,
195 .modify_srq = pvrdma_modify_srq,
196 .query_srq = pvrdma_query_srq,
197
198 INIT_RDMA_OBJ_SIZE(ib_srq, pvrdma_srq, ibsrq),
199};
200
201static int pvrdma_register_device(struct pvrdma_dev *dev)
202{
203 int ret = -1;
204
205 dev->ib_dev.node_guid = dev->dsr->caps.node_guid;
206 dev->sys_image_guid = dev->dsr->caps.sys_image_guid;
207 dev->flags = 0;
208 dev->ib_dev.num_comp_vectors = 1;
209 dev->ib_dev.dev.parent = &dev->pdev->dev;
210
211 dev->ib_dev.node_type = RDMA_NODE_IB_CA;
212 dev->ib_dev.phys_port_cnt = dev->dsr->caps.phys_port_cnt;
213
214 ib_set_device_ops(&dev->ib_dev, &pvrdma_dev_ops);
215
216 mutex_init(&dev->port_mutex);
217 spin_lock_init(&dev->desc_lock);
218
219 dev->cq_tbl = kcalloc(dev->dsr->caps.max_cq, sizeof(struct pvrdma_cq *),
220 GFP_KERNEL);
221 if (!dev->cq_tbl)
222 return ret;
223 spin_lock_init(&dev->cq_tbl_lock);
224
225 dev->qp_tbl = kcalloc(dev->dsr->caps.max_qp, sizeof(struct pvrdma_qp *),
226 GFP_KERNEL);
227 if (!dev->qp_tbl)
228 goto err_cq_free;
229 spin_lock_init(&dev->qp_tbl_lock);
230
231
232 if (dev->dsr->caps.max_srq) {
233 ib_set_device_ops(&dev->ib_dev, &pvrdma_dev_srq_ops);
234
235 dev->srq_tbl = kcalloc(dev->dsr->caps.max_srq,
236 sizeof(struct pvrdma_srq *),
237 GFP_KERNEL);
238 if (!dev->srq_tbl)
239 goto err_qp_free;
240 }
241 ret = ib_device_set_netdev(&dev->ib_dev, dev->netdev, 1);
242 if (ret)
243 goto err_srq_free;
244 spin_lock_init(&dev->srq_tbl_lock);
245
246 ret = ib_register_device(&dev->ib_dev, "vmw_pvrdma%d", &dev->pdev->dev);
247 if (ret)
248 goto err_srq_free;
249
250 dev->ib_active = true;
251
252 return 0;
253
254err_srq_free:
255 kfree(dev->srq_tbl);
256err_qp_free:
257 kfree(dev->qp_tbl);
258err_cq_free:
259 kfree(dev->cq_tbl);
260
261 return ret;
262}
263
264static irqreturn_t pvrdma_intr0_handler(int irq, void *dev_id)
265{
266 u32 icr = PVRDMA_INTR_CAUSE_RESPONSE;
267 struct pvrdma_dev *dev = dev_id;
268
269 dev_dbg(&dev->pdev->dev, "interrupt 0 (response) handler\n");
270
271 if (!dev->pdev->msix_enabled) {
272
273 icr = pvrdma_read_reg(dev, PVRDMA_REG_ICR);
274 if (icr == 0)
275 return IRQ_NONE;
276 }
277
278 if (icr == PVRDMA_INTR_CAUSE_RESPONSE)
279 complete(&dev->cmd_done);
280
281 return IRQ_HANDLED;
282}
283
284static void pvrdma_qp_event(struct pvrdma_dev *dev, u32 qpn, int type)
285{
286 struct pvrdma_qp *qp;
287 unsigned long flags;
288
289 spin_lock_irqsave(&dev->qp_tbl_lock, flags);
290 qp = dev->qp_tbl[qpn % dev->dsr->caps.max_qp];
291 if (qp)
292 refcount_inc(&qp->refcnt);
293 spin_unlock_irqrestore(&dev->qp_tbl_lock, flags);
294
295 if (qp && qp->ibqp.event_handler) {
296 struct ib_qp *ibqp = &qp->ibqp;
297 struct ib_event e;
298
299 e.device = ibqp->device;
300 e.element.qp = ibqp;
301 e.event = type;
302 ibqp->event_handler(&e, ibqp->qp_context);
303 }
304 if (qp) {
305 if (refcount_dec_and_test(&qp->refcnt))
306 complete(&qp->free);
307 }
308}
309
310static void pvrdma_cq_event(struct pvrdma_dev *dev, u32 cqn, int type)
311{
312 struct pvrdma_cq *cq;
313 unsigned long flags;
314
315 spin_lock_irqsave(&dev->cq_tbl_lock, flags);
316 cq = dev->cq_tbl[cqn % dev->dsr->caps.max_cq];
317 if (cq)
318 refcount_inc(&cq->refcnt);
319 spin_unlock_irqrestore(&dev->cq_tbl_lock, flags);
320
321 if (cq && cq->ibcq.event_handler) {
322 struct ib_cq *ibcq = &cq->ibcq;
323 struct ib_event e;
324
325 e.device = ibcq->device;
326 e.element.cq = ibcq;
327 e.event = type;
328 ibcq->event_handler(&e, ibcq->cq_context);
329 }
330 if (cq) {
331 if (refcount_dec_and_test(&cq->refcnt))
332 complete(&cq->free);
333 }
334}
335
336static void pvrdma_srq_event(struct pvrdma_dev *dev, u32 srqn, int type)
337{
338 struct pvrdma_srq *srq;
339 unsigned long flags;
340
341 spin_lock_irqsave(&dev->srq_tbl_lock, flags);
342 if (dev->srq_tbl)
343 srq = dev->srq_tbl[srqn % dev->dsr->caps.max_srq];
344 else
345 srq = NULL;
346 if (srq)
347 refcount_inc(&srq->refcnt);
348 spin_unlock_irqrestore(&dev->srq_tbl_lock, flags);
349
350 if (srq && srq->ibsrq.event_handler) {
351 struct ib_srq *ibsrq = &srq->ibsrq;
352 struct ib_event e;
353
354 e.device = ibsrq->device;
355 e.element.srq = ibsrq;
356 e.event = type;
357 ibsrq->event_handler(&e, ibsrq->srq_context);
358 }
359 if (srq) {
360 if (refcount_dec_and_test(&srq->refcnt))
361 complete(&srq->free);
362 }
363}
364
365static void pvrdma_dispatch_event(struct pvrdma_dev *dev, int port,
366 enum ib_event_type event)
367{
368 struct ib_event ib_event;
369
370 memset(&ib_event, 0, sizeof(ib_event));
371 ib_event.device = &dev->ib_dev;
372 ib_event.element.port_num = port;
373 ib_event.event = event;
374 ib_dispatch_event(&ib_event);
375}
376
377static void pvrdma_dev_event(struct pvrdma_dev *dev, u8 port, int type)
378{
379 if (port < 1 || port > dev->dsr->caps.phys_port_cnt) {
380 dev_warn(&dev->pdev->dev, "event on port %d\n", port);
381 return;
382 }
383
384 pvrdma_dispatch_event(dev, port, type);
385}
386
387static inline struct pvrdma_eqe *get_eqe(struct pvrdma_dev *dev, unsigned int i)
388{
389 return (struct pvrdma_eqe *)pvrdma_page_dir_get_ptr(
390 &dev->async_pdir,
391 PAGE_SIZE +
392 sizeof(struct pvrdma_eqe) * i);
393}
394
395static irqreturn_t pvrdma_intr1_handler(int irq, void *dev_id)
396{
397 struct pvrdma_dev *dev = dev_id;
398 struct pvrdma_ring *ring = &dev->async_ring_state->rx;
399 int ring_slots = (dev->dsr->async_ring_pages.num_pages - 1) *
400 PAGE_SIZE / sizeof(struct pvrdma_eqe);
401 unsigned int head;
402
403 dev_dbg(&dev->pdev->dev, "interrupt 1 (async event) handler\n");
404
405
406
407
408
409 if (!dev->ib_active)
410 return IRQ_HANDLED;
411
412 while (pvrdma_idx_ring_has_data(ring, ring_slots, &head) > 0) {
413 struct pvrdma_eqe *eqe;
414
415 eqe = get_eqe(dev, head);
416
417 switch (eqe->type) {
418 case PVRDMA_EVENT_QP_FATAL:
419 case PVRDMA_EVENT_QP_REQ_ERR:
420 case PVRDMA_EVENT_QP_ACCESS_ERR:
421 case PVRDMA_EVENT_COMM_EST:
422 case PVRDMA_EVENT_SQ_DRAINED:
423 case PVRDMA_EVENT_PATH_MIG:
424 case PVRDMA_EVENT_PATH_MIG_ERR:
425 case PVRDMA_EVENT_QP_LAST_WQE_REACHED:
426 pvrdma_qp_event(dev, eqe->info, eqe->type);
427 break;
428
429 case PVRDMA_EVENT_CQ_ERR:
430 pvrdma_cq_event(dev, eqe->info, eqe->type);
431 break;
432
433 case PVRDMA_EVENT_SRQ_ERR:
434 case PVRDMA_EVENT_SRQ_LIMIT_REACHED:
435 pvrdma_srq_event(dev, eqe->info, eqe->type);
436 break;
437
438 case PVRDMA_EVENT_PORT_ACTIVE:
439 case PVRDMA_EVENT_PORT_ERR:
440 case PVRDMA_EVENT_LID_CHANGE:
441 case PVRDMA_EVENT_PKEY_CHANGE:
442 case PVRDMA_EVENT_SM_CHANGE:
443 case PVRDMA_EVENT_CLIENT_REREGISTER:
444 case PVRDMA_EVENT_GID_CHANGE:
445 pvrdma_dev_event(dev, eqe->info, eqe->type);
446 break;
447
448 case PVRDMA_EVENT_DEVICE_FATAL:
449 pvrdma_dev_event(dev, 1, eqe->type);
450 break;
451
452 default:
453 break;
454 }
455
456 pvrdma_idx_ring_inc(&ring->cons_head, ring_slots);
457 }
458
459 return IRQ_HANDLED;
460}
461
462static inline struct pvrdma_cqne *get_cqne(struct pvrdma_dev *dev,
463 unsigned int i)
464{
465 return (struct pvrdma_cqne *)pvrdma_page_dir_get_ptr(
466 &dev->cq_pdir,
467 PAGE_SIZE +
468 sizeof(struct pvrdma_cqne) * i);
469}
470
471static irqreturn_t pvrdma_intrx_handler(int irq, void *dev_id)
472{
473 struct pvrdma_dev *dev = dev_id;
474 struct pvrdma_ring *ring = &dev->cq_ring_state->rx;
475 int ring_slots = (dev->dsr->cq_ring_pages.num_pages - 1) * PAGE_SIZE /
476 sizeof(struct pvrdma_cqne);
477 unsigned int head;
478
479 dev_dbg(&dev->pdev->dev, "interrupt x (completion) handler\n");
480
481 while (pvrdma_idx_ring_has_data(ring, ring_slots, &head) > 0) {
482 struct pvrdma_cqne *cqne;
483 struct pvrdma_cq *cq;
484
485 cqne = get_cqne(dev, head);
486 spin_lock(&dev->cq_tbl_lock);
487 cq = dev->cq_tbl[cqne->info % dev->dsr->caps.max_cq];
488 if (cq)
489 refcount_inc(&cq->refcnt);
490 spin_unlock(&dev->cq_tbl_lock);
491
492 if (cq && cq->ibcq.comp_handler)
493 cq->ibcq.comp_handler(&cq->ibcq, cq->ibcq.cq_context);
494 if (cq) {
495 if (refcount_dec_and_test(&cq->refcnt))
496 complete(&cq->free);
497 }
498 pvrdma_idx_ring_inc(&ring->cons_head, ring_slots);
499 }
500
501 return IRQ_HANDLED;
502}
503
504static void pvrdma_free_irq(struct pvrdma_dev *dev)
505{
506 int i;
507
508 dev_dbg(&dev->pdev->dev, "freeing interrupts\n");
509 for (i = 0; i < dev->nr_vectors; i++)
510 free_irq(pci_irq_vector(dev->pdev, i), dev);
511}
512
513static void pvrdma_enable_intrs(struct pvrdma_dev *dev)
514{
515 dev_dbg(&dev->pdev->dev, "enable interrupts\n");
516 pvrdma_write_reg(dev, PVRDMA_REG_IMR, 0);
517}
518
519static void pvrdma_disable_intrs(struct pvrdma_dev *dev)
520{
521 dev_dbg(&dev->pdev->dev, "disable interrupts\n");
522 pvrdma_write_reg(dev, PVRDMA_REG_IMR, ~0);
523}
524
525static int pvrdma_alloc_intrs(struct pvrdma_dev *dev)
526{
527 struct pci_dev *pdev = dev->pdev;
528 int ret = 0, i;
529
530 ret = pci_alloc_irq_vectors(pdev, 1, PVRDMA_MAX_INTERRUPTS,
531 PCI_IRQ_MSIX);
532 if (ret < 0) {
533 ret = pci_alloc_irq_vectors(pdev, 1, 1,
534 PCI_IRQ_MSI | PCI_IRQ_LEGACY);
535 if (ret < 0)
536 return ret;
537 }
538 dev->nr_vectors = ret;
539
540 ret = request_irq(pci_irq_vector(dev->pdev, 0), pvrdma_intr0_handler,
541 pdev->msix_enabled ? 0 : IRQF_SHARED, DRV_NAME, dev);
542 if (ret) {
543 dev_err(&dev->pdev->dev,
544 "failed to request interrupt 0\n");
545 goto out_free_vectors;
546 }
547
548 for (i = 1; i < dev->nr_vectors; i++) {
549 ret = request_irq(pci_irq_vector(dev->pdev, i),
550 i == 1 ? pvrdma_intr1_handler :
551 pvrdma_intrx_handler,
552 0, DRV_NAME, dev);
553 if (ret) {
554 dev_err(&dev->pdev->dev,
555 "failed to request interrupt %d\n", i);
556 goto free_irqs;
557 }
558 }
559
560 return 0;
561
562free_irqs:
563 while (--i >= 0)
564 free_irq(pci_irq_vector(dev->pdev, i), dev);
565out_free_vectors:
566 pci_free_irq_vectors(pdev);
567 return ret;
568}
569
570static void pvrdma_free_slots(struct pvrdma_dev *dev)
571{
572 struct pci_dev *pdev = dev->pdev;
573
574 if (dev->resp_slot)
575 dma_free_coherent(&pdev->dev, PAGE_SIZE, dev->resp_slot,
576 dev->dsr->resp_slot_dma);
577 if (dev->cmd_slot)
578 dma_free_coherent(&pdev->dev, PAGE_SIZE, dev->cmd_slot,
579 dev->dsr->cmd_slot_dma);
580}
581
582static int pvrdma_add_gid_at_index(struct pvrdma_dev *dev,
583 const union ib_gid *gid,
584 u8 gid_type,
585 int index)
586{
587 int ret;
588 union pvrdma_cmd_req req;
589 struct pvrdma_cmd_create_bind *cmd_bind = &req.create_bind;
590
591 if (!dev->sgid_tbl) {
592 dev_warn(&dev->pdev->dev, "sgid table not initialized\n");
593 return -EINVAL;
594 }
595
596 memset(cmd_bind, 0, sizeof(*cmd_bind));
597 cmd_bind->hdr.cmd = PVRDMA_CMD_CREATE_BIND;
598 memcpy(cmd_bind->new_gid, gid->raw, 16);
599 cmd_bind->mtu = ib_mtu_enum_to_int(IB_MTU_1024);
600 cmd_bind->vlan = 0xfff;
601 cmd_bind->index = index;
602 cmd_bind->gid_type = gid_type;
603
604 ret = pvrdma_cmd_post(dev, &req, NULL, 0);
605 if (ret < 0) {
606 dev_warn(&dev->pdev->dev,
607 "could not create binding, error: %d\n", ret);
608 return -EFAULT;
609 }
610 memcpy(&dev->sgid_tbl[index], gid, sizeof(*gid));
611 return 0;
612}
613
614static int pvrdma_add_gid(const struct ib_gid_attr *attr, void **context)
615{
616 struct pvrdma_dev *dev = to_vdev(attr->device);
617
618 return pvrdma_add_gid_at_index(dev, &attr->gid,
619 ib_gid_type_to_pvrdma(attr->gid_type),
620 attr->index);
621}
622
623static int pvrdma_del_gid_at_index(struct pvrdma_dev *dev, int index)
624{
625 int ret;
626 union pvrdma_cmd_req req;
627 struct pvrdma_cmd_destroy_bind *cmd_dest = &req.destroy_bind;
628
629
630 if (!dev->sgid_tbl) {
631 dev_warn(&dev->pdev->dev, "sgid table not initialized\n");
632 return -EINVAL;
633 }
634
635 memset(cmd_dest, 0, sizeof(*cmd_dest));
636 cmd_dest->hdr.cmd = PVRDMA_CMD_DESTROY_BIND;
637 memcpy(cmd_dest->dest_gid, &dev->sgid_tbl[index], 16);
638 cmd_dest->index = index;
639
640 ret = pvrdma_cmd_post(dev, &req, NULL, 0);
641 if (ret < 0) {
642 dev_warn(&dev->pdev->dev,
643 "could not destroy binding, error: %d\n", ret);
644 return ret;
645 }
646 memset(&dev->sgid_tbl[index], 0, 16);
647 return 0;
648}
649
650static int pvrdma_del_gid(const struct ib_gid_attr *attr, void **context)
651{
652 struct pvrdma_dev *dev = to_vdev(attr->device);
653
654 dev_dbg(&dev->pdev->dev, "removing gid at index %u from %s",
655 attr->index, dev->netdev->name);
656
657 return pvrdma_del_gid_at_index(dev, attr->index);
658}
659
660static void pvrdma_netdevice_event_handle(struct pvrdma_dev *dev,
661 struct net_device *ndev,
662 unsigned long event)
663{
664 struct pci_dev *pdev_net;
665 unsigned int slot;
666
667 switch (event) {
668 case NETDEV_REBOOT:
669 case NETDEV_DOWN:
670 pvrdma_dispatch_event(dev, 1, IB_EVENT_PORT_ERR);
671 break;
672 case NETDEV_UP:
673 pvrdma_write_reg(dev, PVRDMA_REG_CTL,
674 PVRDMA_DEVICE_CTL_UNQUIESCE);
675
676 mb();
677
678 if (pvrdma_read_reg(dev, PVRDMA_REG_ERR))
679 dev_err(&dev->pdev->dev,
680 "failed to activate device during link up\n");
681 else
682 pvrdma_dispatch_event(dev, 1, IB_EVENT_PORT_ACTIVE);
683 break;
684 case NETDEV_UNREGISTER:
685 ib_device_set_netdev(&dev->ib_dev, NULL, 1);
686 dev_put(dev->netdev);
687 dev->netdev = NULL;
688 break;
689 case NETDEV_REGISTER:
690
691 slot = PCI_SLOT(dev->pdev->devfn);
692 pdev_net = pci_get_slot(dev->pdev->bus,
693 PCI_DEVFN(slot, 0));
694 if ((dev->netdev == NULL) &&
695 (pci_get_drvdata(pdev_net) == ndev)) {
696
697 ib_device_set_netdev(&dev->ib_dev, ndev, 1);
698 dev->netdev = ndev;
699 dev_hold(ndev);
700 }
701 pci_dev_put(pdev_net);
702 break;
703
704 default:
705 dev_dbg(&dev->pdev->dev, "ignore netdevice event %ld on %s\n",
706 event, dev_name(&dev->ib_dev.dev));
707 break;
708 }
709}
710
711static void pvrdma_netdevice_event_work(struct work_struct *work)
712{
713 struct pvrdma_netdevice_work *netdev_work;
714 struct pvrdma_dev *dev;
715
716 netdev_work = container_of(work, struct pvrdma_netdevice_work, work);
717
718 mutex_lock(&pvrdma_device_list_lock);
719 list_for_each_entry(dev, &pvrdma_device_list, device_link) {
720 if ((netdev_work->event == NETDEV_REGISTER) ||
721 (dev->netdev == netdev_work->event_netdev)) {
722 pvrdma_netdevice_event_handle(dev,
723 netdev_work->event_netdev,
724 netdev_work->event);
725 break;
726 }
727 }
728 mutex_unlock(&pvrdma_device_list_lock);
729
730 kfree(netdev_work);
731}
732
733static int pvrdma_netdevice_event(struct notifier_block *this,
734 unsigned long event, void *ptr)
735{
736 struct net_device *event_netdev = netdev_notifier_info_to_dev(ptr);
737 struct pvrdma_netdevice_work *netdev_work;
738
739 netdev_work = kmalloc(sizeof(*netdev_work), GFP_ATOMIC);
740 if (!netdev_work)
741 return NOTIFY_BAD;
742
743 INIT_WORK(&netdev_work->work, pvrdma_netdevice_event_work);
744 netdev_work->event_netdev = event_netdev;
745 netdev_work->event = event;
746 queue_work(event_wq, &netdev_work->work);
747
748 return NOTIFY_DONE;
749}
750
751static int pvrdma_pci_probe(struct pci_dev *pdev,
752 const struct pci_device_id *id)
753{
754 struct pci_dev *pdev_net;
755 struct pvrdma_dev *dev;
756 int ret;
757 unsigned long start;
758 unsigned long len;
759 dma_addr_t slot_dma = 0;
760
761 dev_dbg(&pdev->dev, "initializing driver %s\n", pci_name(pdev));
762
763
764 dev = ib_alloc_device(pvrdma_dev, ib_dev);
765 if (!dev) {
766 dev_err(&pdev->dev, "failed to allocate IB device\n");
767 return -ENOMEM;
768 }
769
770 mutex_lock(&pvrdma_device_list_lock);
771 list_add(&dev->device_link, &pvrdma_device_list);
772 mutex_unlock(&pvrdma_device_list_lock);
773
774 ret = pvrdma_init_device(dev);
775 if (ret)
776 goto err_free_device;
777
778 dev->pdev = pdev;
779 pci_set_drvdata(pdev, dev);
780
781 ret = pci_enable_device(pdev);
782 if (ret) {
783 dev_err(&pdev->dev, "cannot enable PCI device\n");
784 goto err_free_device;
785 }
786
787 dev_dbg(&pdev->dev, "PCI resource flags BAR0 %#lx\n",
788 pci_resource_flags(pdev, 0));
789 dev_dbg(&pdev->dev, "PCI resource len %#llx\n",
790 (unsigned long long)pci_resource_len(pdev, 0));
791 dev_dbg(&pdev->dev, "PCI resource start %#llx\n",
792 (unsigned long long)pci_resource_start(pdev, 0));
793 dev_dbg(&pdev->dev, "PCI resource flags BAR1 %#lx\n",
794 pci_resource_flags(pdev, 1));
795 dev_dbg(&pdev->dev, "PCI resource len %#llx\n",
796 (unsigned long long)pci_resource_len(pdev, 1));
797 dev_dbg(&pdev->dev, "PCI resource start %#llx\n",
798 (unsigned long long)pci_resource_start(pdev, 1));
799
800 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM) ||
801 !(pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
802 dev_err(&pdev->dev, "PCI BAR region not MMIO\n");
803 ret = -ENOMEM;
804 goto err_disable_pdev;
805 }
806
807 ret = pci_request_regions(pdev, DRV_NAME);
808 if (ret) {
809 dev_err(&pdev->dev, "cannot request PCI resources\n");
810 goto err_disable_pdev;
811 }
812
813
814 if (dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)) != 0) {
815 ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
816 if (ret != 0) {
817 dev_err(&pdev->dev, "dma_set_mask failed\n");
818 goto err_free_resource;
819 }
820 }
821 dma_set_max_seg_size(&pdev->dev, UINT_MAX);
822 pci_set_master(pdev);
823
824
825 start = pci_resource_start(dev->pdev, PVRDMA_PCI_RESOURCE_REG);
826 len = pci_resource_len(dev->pdev, PVRDMA_PCI_RESOURCE_REG);
827 dev->regs = ioremap(start, len);
828 if (!dev->regs) {
829 dev_err(&pdev->dev, "register mapping failed\n");
830 ret = -ENOMEM;
831 goto err_free_resource;
832 }
833
834
835 dev->driver_uar.index = 0;
836 dev->driver_uar.pfn =
837 pci_resource_start(dev->pdev, PVRDMA_PCI_RESOURCE_UAR) >>
838 PAGE_SHIFT;
839 dev->driver_uar.map =
840 ioremap(dev->driver_uar.pfn << PAGE_SHIFT, PAGE_SIZE);
841 if (!dev->driver_uar.map) {
842 dev_err(&pdev->dev, "failed to remap UAR pages\n");
843 ret = -ENOMEM;
844 goto err_unmap_regs;
845 }
846
847 dev->dsr_version = pvrdma_read_reg(dev, PVRDMA_REG_VERSION);
848 dev_info(&pdev->dev, "device version %d, driver version %d\n",
849 dev->dsr_version, PVRDMA_VERSION);
850
851 dev->dsr = dma_alloc_coherent(&pdev->dev, sizeof(*dev->dsr),
852 &dev->dsrbase, GFP_KERNEL);
853 if (!dev->dsr) {
854 dev_err(&pdev->dev, "failed to allocate shared region\n");
855 ret = -ENOMEM;
856 goto err_uar_unmap;
857 }
858
859
860 dev->dsr->driver_version = PVRDMA_VERSION;
861 dev->dsr->gos_info.gos_bits = sizeof(void *) == 4 ?
862 PVRDMA_GOS_BITS_32 :
863 PVRDMA_GOS_BITS_64;
864 dev->dsr->gos_info.gos_type = PVRDMA_GOS_TYPE_LINUX;
865 dev->dsr->gos_info.gos_ver = 1;
866
867 if (dev->dsr_version < PVRDMA_PPN64_VERSION)
868 dev->dsr->uar_pfn = dev->driver_uar.pfn;
869 else
870 dev->dsr->uar_pfn64 = dev->driver_uar.pfn;
871
872
873 dev->cmd_slot = dma_alloc_coherent(&pdev->dev, PAGE_SIZE,
874 &slot_dma, GFP_KERNEL);
875 if (!dev->cmd_slot) {
876 ret = -ENOMEM;
877 goto err_free_dsr;
878 }
879
880 dev->dsr->cmd_slot_dma = (u64)slot_dma;
881
882
883 dev->resp_slot = dma_alloc_coherent(&pdev->dev, PAGE_SIZE,
884 &slot_dma, GFP_KERNEL);
885 if (!dev->resp_slot) {
886 ret = -ENOMEM;
887 goto err_free_slots;
888 }
889
890 dev->dsr->resp_slot_dma = (u64)slot_dma;
891
892
893 dev->dsr->async_ring_pages.num_pages = PVRDMA_NUM_RING_PAGES;
894 ret = pvrdma_page_dir_init(dev, &dev->async_pdir,
895 dev->dsr->async_ring_pages.num_pages, true);
896 if (ret)
897 goto err_free_slots;
898 dev->async_ring_state = dev->async_pdir.pages[0];
899 dev->dsr->async_ring_pages.pdir_dma = dev->async_pdir.dir_dma;
900
901
902 dev->dsr->cq_ring_pages.num_pages = PVRDMA_NUM_RING_PAGES;
903 ret = pvrdma_page_dir_init(dev, &dev->cq_pdir,
904 dev->dsr->cq_ring_pages.num_pages, true);
905 if (ret)
906 goto err_free_async_ring;
907 dev->cq_ring_state = dev->cq_pdir.pages[0];
908 dev->dsr->cq_ring_pages.pdir_dma = dev->cq_pdir.dir_dma;
909
910
911
912
913
914
915
916 pvrdma_write_reg(dev, PVRDMA_REG_DSRLOW, (u32)dev->dsrbase);
917 pvrdma_write_reg(dev, PVRDMA_REG_DSRHIGH,
918 (u32)((u64)(dev->dsrbase) >> 32));
919
920
921 mb();
922
923
924 if (!PVRDMA_SUPPORTED(dev)) {
925 dev_err(&pdev->dev, "driver needs RoCE v1 or v2 support\n");
926 ret = -EFAULT;
927 goto err_free_cq_ring;
928 }
929
930
931 pdev_net = pci_get_slot(pdev->bus, PCI_DEVFN(PCI_SLOT(pdev->devfn), 0));
932 if (!pdev_net) {
933 dev_err(&pdev->dev, "failed to find paired net device\n");
934 ret = -ENODEV;
935 goto err_free_cq_ring;
936 }
937
938 if (pdev_net->vendor != PCI_VENDOR_ID_VMWARE ||
939 pdev_net->device != PCI_DEVICE_ID_VMWARE_VMXNET3) {
940 dev_err(&pdev->dev, "failed to find paired vmxnet3 device\n");
941 pci_dev_put(pdev_net);
942 ret = -ENODEV;
943 goto err_free_cq_ring;
944 }
945
946 dev->netdev = pci_get_drvdata(pdev_net);
947 pci_dev_put(pdev_net);
948 if (!dev->netdev) {
949 dev_err(&pdev->dev, "failed to get vmxnet3 device\n");
950 ret = -ENODEV;
951 goto err_free_cq_ring;
952 }
953 dev_hold(dev->netdev);
954
955 dev_info(&pdev->dev, "paired device to %s\n", dev->netdev->name);
956
957
958 ret = pvrdma_alloc_intrs(dev);
959 if (ret) {
960 dev_err(&pdev->dev, "failed to allocate interrupts\n");
961 ret = -ENOMEM;
962 goto err_free_cq_ring;
963 }
964
965
966 ret = pvrdma_uar_table_init(dev);
967 if (ret) {
968 dev_err(&pdev->dev, "failed to allocate UAR table\n");
969 ret = -ENOMEM;
970 goto err_free_intrs;
971 }
972
973
974 dev->sgid_tbl = kcalloc(dev->dsr->caps.gid_tbl_len,
975 sizeof(union ib_gid), GFP_KERNEL);
976 if (!dev->sgid_tbl) {
977 ret = -ENOMEM;
978 goto err_free_uar_table;
979 }
980 dev_dbg(&pdev->dev, "gid table len %d\n", dev->dsr->caps.gid_tbl_len);
981
982 pvrdma_enable_intrs(dev);
983
984
985 pvrdma_write_reg(dev, PVRDMA_REG_CTL, PVRDMA_DEVICE_CTL_ACTIVATE);
986
987
988 mb();
989
990
991 ret = pvrdma_read_reg(dev, PVRDMA_REG_ERR);
992 if (ret != 0) {
993 dev_err(&pdev->dev, "failed to activate device\n");
994 ret = -EFAULT;
995 goto err_disable_intr;
996 }
997
998
999 ret = pvrdma_register_device(dev);
1000 if (ret) {
1001 dev_err(&pdev->dev, "failed to register IB device\n");
1002 goto err_disable_intr;
1003 }
1004
1005 dev->nb_netdev.notifier_call = pvrdma_netdevice_event;
1006 ret = register_netdevice_notifier(&dev->nb_netdev);
1007 if (ret) {
1008 dev_err(&pdev->dev, "failed to register netdevice events\n");
1009 goto err_unreg_ibdev;
1010 }
1011
1012 dev_info(&pdev->dev, "attached to device\n");
1013 return 0;
1014
1015err_unreg_ibdev:
1016 ib_unregister_device(&dev->ib_dev);
1017err_disable_intr:
1018 pvrdma_disable_intrs(dev);
1019 kfree(dev->sgid_tbl);
1020err_free_uar_table:
1021 pvrdma_uar_table_cleanup(dev);
1022err_free_intrs:
1023 pvrdma_free_irq(dev);
1024 pci_free_irq_vectors(pdev);
1025err_free_cq_ring:
1026 if (dev->netdev) {
1027 dev_put(dev->netdev);
1028 dev->netdev = NULL;
1029 }
1030 pvrdma_page_dir_cleanup(dev, &dev->cq_pdir);
1031err_free_async_ring:
1032 pvrdma_page_dir_cleanup(dev, &dev->async_pdir);
1033err_free_slots:
1034 pvrdma_free_slots(dev);
1035err_free_dsr:
1036 dma_free_coherent(&pdev->dev, sizeof(*dev->dsr), dev->dsr,
1037 dev->dsrbase);
1038err_uar_unmap:
1039 iounmap(dev->driver_uar.map);
1040err_unmap_regs:
1041 iounmap(dev->regs);
1042err_free_resource:
1043 pci_release_regions(pdev);
1044err_disable_pdev:
1045 pci_disable_device(pdev);
1046 pci_set_drvdata(pdev, NULL);
1047err_free_device:
1048 mutex_lock(&pvrdma_device_list_lock);
1049 list_del(&dev->device_link);
1050 mutex_unlock(&pvrdma_device_list_lock);
1051 ib_dealloc_device(&dev->ib_dev);
1052 return ret;
1053}
1054
1055static void pvrdma_pci_remove(struct pci_dev *pdev)
1056{
1057 struct pvrdma_dev *dev = pci_get_drvdata(pdev);
1058
1059 if (!dev)
1060 return;
1061
1062 dev_info(&pdev->dev, "detaching from device\n");
1063
1064 unregister_netdevice_notifier(&dev->nb_netdev);
1065 dev->nb_netdev.notifier_call = NULL;
1066
1067 flush_workqueue(event_wq);
1068
1069 if (dev->netdev) {
1070 dev_put(dev->netdev);
1071 dev->netdev = NULL;
1072 }
1073
1074
1075 ib_unregister_device(&dev->ib_dev);
1076
1077 mutex_lock(&pvrdma_device_list_lock);
1078 list_del(&dev->device_link);
1079 mutex_unlock(&pvrdma_device_list_lock);
1080
1081 pvrdma_disable_intrs(dev);
1082 pvrdma_free_irq(dev);
1083 pci_free_irq_vectors(pdev);
1084
1085
1086 pvrdma_write_reg(dev, PVRDMA_REG_CTL, PVRDMA_DEVICE_CTL_RESET);
1087 pvrdma_page_dir_cleanup(dev, &dev->cq_pdir);
1088 pvrdma_page_dir_cleanup(dev, &dev->async_pdir);
1089 pvrdma_free_slots(dev);
1090 dma_free_coherent(&pdev->dev, sizeof(*dev->dsr), dev->dsr,
1091 dev->dsrbase);
1092
1093 iounmap(dev->regs);
1094 kfree(dev->sgid_tbl);
1095 kfree(dev->cq_tbl);
1096 kfree(dev->srq_tbl);
1097 kfree(dev->qp_tbl);
1098 pvrdma_uar_table_cleanup(dev);
1099 iounmap(dev->driver_uar.map);
1100
1101 ib_dealloc_device(&dev->ib_dev);
1102
1103
1104 pci_release_regions(pdev);
1105 pci_disable_device(pdev);
1106 pci_set_drvdata(pdev, NULL);
1107}
1108
1109static const struct pci_device_id pvrdma_pci_table[] = {
1110 { PCI_DEVICE(PCI_VENDOR_ID_VMWARE, PCI_DEVICE_ID_VMWARE_PVRDMA), },
1111 { 0 },
1112};
1113
1114MODULE_DEVICE_TABLE(pci, pvrdma_pci_table);
1115
1116static struct pci_driver pvrdma_driver = {
1117 .name = DRV_NAME,
1118 .id_table = pvrdma_pci_table,
1119 .probe = pvrdma_pci_probe,
1120 .remove = pvrdma_pci_remove,
1121};
1122
1123static int __init pvrdma_init(void)
1124{
1125 int err;
1126
1127 event_wq = alloc_ordered_workqueue("pvrdma_event_wq", WQ_MEM_RECLAIM);
1128 if (!event_wq)
1129 return -ENOMEM;
1130
1131 err = pci_register_driver(&pvrdma_driver);
1132 if (err)
1133 destroy_workqueue(event_wq);
1134
1135 return err;
1136}
1137
1138static void __exit pvrdma_cleanup(void)
1139{
1140 pci_unregister_driver(&pvrdma_driver);
1141
1142 destroy_workqueue(event_wq);
1143}
1144
1145module_init(pvrdma_init);
1146module_exit(pvrdma_cleanup);
1147
1148MODULE_AUTHOR("VMware, Inc");
1149MODULE_DESCRIPTION("VMware Paravirtual RDMA driver");
1150MODULE_LICENSE("Dual BSD/GPL");
1151
