Lines Matching +full:layer +full:- +full:buffer +full:- +full:offset
53 #include <linux/dma-mapping.h>
68 #define NTB_TRANSPORT_DESC "Software Queue-Pair Transport over NTB"
104 /* Only two-ports NTB devices are supported */
142 u8 qp_num; /* Only 64 QP's are allowed. 0-63 */
272 #define QP_TO_MW(nt, qp) ((qp) % nt->mw_count)
281 static void ntb_memcpy_tx(struct ntb_queue_entry *entry, void __iomem *offset);
282 static int ntb_async_rx_submit(struct ntb_queue_entry *entry, void *offset);
283 static void ntb_memcpy_rx(struct ntb_queue_entry *entry, void *offset);
289 return !strncmp(dev_name(dev), drv->name, strlen(drv->name)); in ntb_transport_bus_match()
299 client = drv_client(dev->driver); in ntb_transport_bus_probe()
300 rc = client->probe(dev); in ntb_transport_bus_probe()
311 client = drv_client(dev->driver); in ntb_transport_bus_remove()
312 client->remove(dev); in ntb_transport_bus_remove()
328 list_add_tail(&nt->entry, &ntb_transport_list); in ntb_bus_init()
336 list_for_each_entry_safe(client_dev, cd, &nt->client_devs, entry) { in ntb_bus_remove()
337 dev_err(client_dev->dev.parent, "%s still attached to bus, removing\n", in ntb_bus_remove()
338 dev_name(&client_dev->dev)); in ntb_bus_remove()
339 list_del(&client_dev->entry); in ntb_bus_remove()
340 device_unregister(&client_dev->dev); in ntb_bus_remove()
343 list_del(&nt->entry); in ntb_bus_remove()
355 * ntb_transport_unregister_client_dev - Unregister NTB client device
358 * Unregister an NTB client device with the NTB transport layer
366 list_for_each_entry_safe(client, cd, &nt->client_devs, entry) in ntb_transport_unregister_client_dev()
367 if (!strncmp(dev_name(&client->dev), device_name, in ntb_transport_unregister_client_dev()
369 list_del(&client->entry); in ntb_transport_unregister_client_dev()
370 device_unregister(&client->dev); in ntb_transport_unregister_client_dev()
376 * ntb_transport_register_client_dev - Register NTB client device
379 * Register an NTB client device with the NTB transport layer
389 return -ENODEV; in ntb_transport_register_client_dev()
394 node = dev_to_node(&nt->ndev->dev); in ntb_transport_register_client_dev()
399 rc = -ENOMEM; in ntb_transport_register_client_dev()
403 dev = &client_dev->dev; in ntb_transport_register_client_dev()
407 dev->bus = &ntb_transport_bus; in ntb_transport_register_client_dev()
408 dev->release = ntb_transport_client_release; in ntb_transport_register_client_dev()
409 dev->parent = &nt->ndev->dev; in ntb_transport_register_client_dev()
417 list_add_tail(&client_dev->entry, &nt->client_devs); in ntb_transport_register_client_dev()
431 * ntb_transport_register_client - Register NTB client driver
434 * Register an NTB client driver with the NTB transport layer
436 * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
440 drv->driver.bus = &ntb_transport_bus; in ntb_transport_register_client()
443 return -ENODEV; in ntb_transport_register_client()
445 return driver_register(&drv->driver); in ntb_transport_register_client()
450 * ntb_transport_unregister_client - Unregister NTB client driver
453 * Unregister an NTB client driver with the NTB transport layer
455 * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
459 driver_unregister(&drv->driver); in ntb_transport_unregister_client()
470 qp = filp->private_data; in debugfs_read()
472 if (!qp || !qp->link_is_up) in debugfs_read()
479 return -ENOMEM; in debugfs_read()
482 out_offset += scnprintf(buf + out_offset, out_count - out_offset, in debugfs_read()
484 out_offset += scnprintf(buf + out_offset, out_count - out_offset, in debugfs_read()
485 "rx_bytes - \t%llu\n", qp->rx_bytes); in debugfs_read()
486 out_offset += scnprintf(buf + out_offset, out_count - out_offset, in debugfs_read()
487 "rx_pkts - \t%llu\n", qp->rx_pkts); in debugfs_read()
488 out_offset += scnprintf(buf + out_offset, out_count - out_offset, in debugfs_read()
489 "rx_memcpy - \t%llu\n", qp->rx_memcpy); in debugfs_read()
490 out_offset += scnprintf(buf + out_offset, out_count - out_offset, in debugfs_read()
491 "rx_async - \t%llu\n", qp->rx_async); in debugfs_read()
492 out_offset += scnprintf(buf + out_offset, out_count - out_offset, in debugfs_read()
493 "rx_ring_empty - %llu\n", qp->rx_ring_empty); in debugfs_read()
494 out_offset += scnprintf(buf + out_offset, out_count - out_offset, in debugfs_read()
495 "rx_err_no_buf - %llu\n", qp->rx_err_no_buf); in debugfs_read()
496 out_offset += scnprintf(buf + out_offset, out_count - out_offset, in debugfs_read()
497 "rx_err_oflow - \t%llu\n", qp->rx_err_oflow); in debugfs_read()
498 out_offset += scnprintf(buf + out_offset, out_count - out_offset, in debugfs_read()
499 "rx_err_ver - \t%llu\n", qp->rx_err_ver); in debugfs_read()
500 out_offset += scnprintf(buf + out_offset, out_count - out_offset, in debugfs_read()
501 "rx_buff - \t0x%p\n", qp->rx_buff); in debugfs_read()
502 out_offset += scnprintf(buf + out_offset, out_count - out_offset, in debugfs_read()
503 "rx_index - \t%u\n", qp->rx_index); in debugfs_read()
504 out_offset += scnprintf(buf + out_offset, out_count - out_offset, in debugfs_read()
505 "rx_max_entry - \t%u\n", qp->rx_max_entry); in debugfs_read()
506 out_offset += scnprintf(buf + out_offset, out_count - out_offset, in debugfs_read()
507 "rx_alloc_entry - \t%u\n\n", qp->rx_alloc_entry); in debugfs_read()
509 out_offset += scnprintf(buf + out_offset, out_count - out_offset, in debugfs_read()
510 "tx_bytes - \t%llu\n", qp->tx_bytes); in debugfs_read()
511 out_offset += scnprintf(buf + out_offset, out_count - out_offset, in debugfs_read()
512 "tx_pkts - \t%llu\n", qp->tx_pkts); in debugfs_read()
513 out_offset += scnprintf(buf + out_offset, out_count - out_offset, in debugfs_read()
514 "tx_memcpy - \t%llu\n", qp->tx_memcpy); in debugfs_read()
515 out_offset += scnprintf(buf + out_offset, out_count - out_offset, in debugfs_read()
516 "tx_async - \t%llu\n", qp->tx_async); in debugfs_read()
517 out_offset += scnprintf(buf + out_offset, out_count - out_offset, in debugfs_read()
518 "tx_ring_full - \t%llu\n", qp->tx_ring_full); in debugfs_read()
519 out_offset += scnprintf(buf + out_offset, out_count - out_offset, in debugfs_read()
520 "tx_err_no_buf - %llu\n", qp->tx_err_no_buf); in debugfs_read()
521 out_offset += scnprintf(buf + out_offset, out_count - out_offset, in debugfs_read()
522 "tx_mw - \t0x%p\n", qp->tx_mw); in debugfs_read()
523 out_offset += scnprintf(buf + out_offset, out_count - out_offset, in debugfs_read()
524 "tx_index (H) - \t%u\n", qp->tx_index); in debugfs_read()
525 out_offset += scnprintf(buf + out_offset, out_count - out_offset, in debugfs_read()
526 "RRI (T) - \t%u\n", in debugfs_read()
527 qp->remote_rx_info->entry); in debugfs_read()
528 out_offset += scnprintf(buf + out_offset, out_count - out_offset, in debugfs_read()
529 "tx_max_entry - \t%u\n", qp->tx_max_entry); in debugfs_read()
530 out_offset += scnprintf(buf + out_offset, out_count - out_offset, in debugfs_read()
531 "free tx - \t%u\n", in debugfs_read()
534 out_offset += scnprintf(buf + out_offset, out_count - out_offset, in debugfs_read()
536 out_offset += scnprintf(buf + out_offset, out_count - out_offset, in debugfs_read()
537 "Using TX DMA - \t%s\n", in debugfs_read()
538 qp->tx_dma_chan ? "Yes" : "No"); in debugfs_read()
539 out_offset += scnprintf(buf + out_offset, out_count - out_offset, in debugfs_read()
540 "Using RX DMA - \t%s\n", in debugfs_read()
541 qp->rx_dma_chan ? "Yes" : "No"); in debugfs_read()
542 out_offset += scnprintf(buf + out_offset, out_count - out_offset, in debugfs_read()
543 "QP Link - \t%s\n", in debugfs_read()
544 qp->link_is_up ? "Up" : "Down"); in debugfs_read()
545 out_offset += scnprintf(buf + out_offset, out_count - out_offset, in debugfs_read()
584 list_del(&entry->entry); in ntb_list_rm()
605 list_move_tail(&entry->entry, to_list); in ntb_list_mv()
616 struct ntb_transport_qp *qp = &nt->qp_vec[qp_num]; in ntb_transport_setup_qp_mw()
618 struct ntb_dev *ndev = nt->ndev; in ntb_transport_setup_qp_mw()
625 mw_count = nt->mw_count; in ntb_transport_setup_qp_mw()
626 qp_count = nt->qp_count; in ntb_transport_setup_qp_mw()
629 mw = &nt->mw_vec[mw_num]; in ntb_transport_setup_qp_mw()
631 if (!mw->virt_addr) in ntb_transport_setup_qp_mw()
632 return -ENOMEM; in ntb_transport_setup_qp_mw()
639 rx_size = (unsigned int)mw->xlat_size / num_qps_mw; in ntb_transport_setup_qp_mw()
640 qp->rx_buff = mw->virt_addr + rx_size * (qp_num / mw_count); in ntb_transport_setup_qp_mw()
641 rx_size -= sizeof(struct ntb_rx_info); in ntb_transport_setup_qp_mw()
643 qp->remote_rx_info = qp->rx_buff + rx_size; in ntb_transport_setup_qp_mw()
646 qp->rx_max_frame = min(transport_mtu, rx_size / 2); in ntb_transport_setup_qp_mw()
647 qp->rx_max_entry = rx_size / qp->rx_max_frame; in ntb_transport_setup_qp_mw()
648 qp->rx_index = 0; in ntb_transport_setup_qp_mw()
655 node = dev_to_node(&ndev->dev); in ntb_transport_setup_qp_mw()
656 for (i = qp->rx_alloc_entry; i < qp->rx_max_entry; i++) { in ntb_transport_setup_qp_mw()
659 return -ENOMEM; in ntb_transport_setup_qp_mw()
661 entry->qp = qp; in ntb_transport_setup_qp_mw()
662 ntb_list_add(&qp->ntb_rx_q_lock, &entry->entry, in ntb_transport_setup_qp_mw()
663 &qp->rx_free_q); in ntb_transport_setup_qp_mw()
664 qp->rx_alloc_entry++; in ntb_transport_setup_qp_mw()
667 qp->remote_rx_info->entry = qp->rx_max_entry - 1; in ntb_transport_setup_qp_mw()
670 for (i = 0; i < qp->rx_max_entry; i++) { in ntb_transport_setup_qp_mw()
671 void *offset = (qp->rx_buff + qp->rx_max_frame * (i + 1) - in ntb_transport_setup_qp_mw() local
673 memset(offset, 0, sizeof(struct ntb_payload_header)); in ntb_transport_setup_qp_mw()
676 qp->rx_pkts = 0; in ntb_transport_setup_qp_mw()
677 qp->tx_pkts = 0; in ntb_transport_setup_qp_mw()
678 qp->tx_index = 0; in ntb_transport_setup_qp_mw()
687 tasklet_schedule(&qp->rxc_db_work); in ntb_transport_isr()
695 struct ntb_transport_qp *qp = &nt->qp_vec[qp_num]; in ntb_transport_setup_qp_peer_msi()
696 int spad = qp_num * 2 + nt->msi_spad_offset; in ntb_transport_setup_qp_peer_msi()
698 if (!nt->use_msi) in ntb_transport_setup_qp_peer_msi()
701 if (spad >= ntb_spad_count(nt->ndev)) in ntb_transport_setup_qp_peer_msi()
704 qp->peer_msi_desc.addr_offset = in ntb_transport_setup_qp_peer_msi()
705 ntb_peer_spad_read(qp->ndev, PIDX, spad); in ntb_transport_setup_qp_peer_msi()
706 qp->peer_msi_desc.data = in ntb_transport_setup_qp_peer_msi()
707 ntb_peer_spad_read(qp->ndev, PIDX, spad + 1); in ntb_transport_setup_qp_peer_msi()
709 dev_dbg(&qp->ndev->pdev->dev, "QP%d Peer MSI addr=%x data=%x\n", in ntb_transport_setup_qp_peer_msi()
710 qp_num, qp->peer_msi_desc.addr_offset, qp->peer_msi_desc.data); in ntb_transport_setup_qp_peer_msi()
712 if (qp->peer_msi_desc.addr_offset) { in ntb_transport_setup_qp_peer_msi()
713 qp->use_msi = true; in ntb_transport_setup_qp_peer_msi()
714 dev_info(&qp->ndev->pdev->dev, in ntb_transport_setup_qp_peer_msi()
722 struct ntb_transport_qp *qp = &nt->qp_vec[qp_num]; in ntb_transport_setup_qp_msi()
723 int spad = qp_num * 2 + nt->msi_spad_offset; in ntb_transport_setup_qp_msi()
726 if (!nt->use_msi) in ntb_transport_setup_qp_msi()
729 if (spad >= ntb_spad_count(nt->ndev)) { in ntb_transport_setup_qp_msi()
730 dev_warn_once(&qp->ndev->pdev->dev, in ntb_transport_setup_qp_msi()
735 ntb_spad_write(qp->ndev, spad, 0); in ntb_transport_setup_qp_msi()
736 ntb_spad_write(qp->ndev, spad + 1, 0); in ntb_transport_setup_qp_msi()
738 if (!qp->msi_irq) { in ntb_transport_setup_qp_msi()
739 qp->msi_irq = ntbm_msi_request_irq(qp->ndev, ntb_transport_isr, in ntb_transport_setup_qp_msi()
741 &qp->msi_desc); in ntb_transport_setup_qp_msi()
742 if (qp->msi_irq < 0) { in ntb_transport_setup_qp_msi()
743 dev_warn(&qp->ndev->pdev->dev, in ntb_transport_setup_qp_msi()
750 rc = ntb_spad_write(qp->ndev, spad, qp->msi_desc.addr_offset); in ntb_transport_setup_qp_msi()
754 rc = ntb_spad_write(qp->ndev, spad + 1, qp->msi_desc.data); in ntb_transport_setup_qp_msi()
758 dev_dbg(&qp->ndev->pdev->dev, "QP%d MSI %d addr=%x data=%x\n", in ntb_transport_setup_qp_msi()
759 qp_num, qp->msi_irq, qp->msi_desc.addr_offset, in ntb_transport_setup_qp_msi()
760 qp->msi_desc.data); in ntb_transport_setup_qp_msi()
765 devm_free_irq(&nt->ndev->dev, qp->msi_irq, qp); in ntb_transport_setup_qp_msi()
772 dev_dbg(&nt->ndev->pdev->dev, "Peer MSI descriptors changed"); in ntb_transport_msi_peer_desc_changed()
774 for (i = 0; i < nt->qp_count; i++) in ntb_transport_msi_peer_desc_changed()
783 dev_dbg(&nt->ndev->pdev->dev, "MSI descriptors changed"); in ntb_transport_msi_desc_changed()
785 for (i = 0; i < nt->qp_count; i++) in ntb_transport_msi_desc_changed()
788 ntb_peer_db_set(nt->ndev, nt->msi_db_mask); in ntb_transport_msi_desc_changed()
793 struct ntb_transport_mw *mw = &nt->mw_vec[num_mw]; in ntb_free_mw()
794 struct pci_dev *pdev = nt->ndev->pdev; in ntb_free_mw()
796 if (!mw->virt_addr) in ntb_free_mw()
799 ntb_mw_clear_trans(nt->ndev, PIDX, num_mw); in ntb_free_mw()
800 dma_free_coherent(&pdev->dev, mw->alloc_size, in ntb_free_mw()
801 mw->alloc_addr, mw->dma_addr); in ntb_free_mw()
802 mw->xlat_size = 0; in ntb_free_mw()
803 mw->buff_size = 0; in ntb_free_mw()
804 mw->alloc_size = 0; in ntb_free_mw()
805 mw->alloc_addr = NULL; in ntb_free_mw()
806 mw->virt_addr = NULL; in ntb_free_mw()
817 * The buffer here is allocated against the NTB device. The reason to in ntb_alloc_mw_buffer()
818 * use dma_alloc_*() call is to allocate a large IOVA contiguous buffer in ntb_alloc_mw_buffer()
820 * processing, the data is being copied out of the receive buffer to in ntb_alloc_mw_buffer()
822 * is called on the kvaddr of the receive buffer (from dma_alloc_*()) in ntb_alloc_mw_buffer()
828 alloc_addr = dma_alloc_attrs(ntb_dev, mw->alloc_size, in ntb_alloc_mw_buffer()
833 mw->alloc_size); in ntb_alloc_mw_buffer()
834 return -ENOMEM; in ntb_alloc_mw_buffer()
845 if (mw->alloc_size > mw->buff_size) { in ntb_alloc_mw_buffer()
849 rc = -ENOMEM; in ntb_alloc_mw_buffer()
854 mw->alloc_addr = alloc_addr; in ntb_alloc_mw_buffer()
855 mw->virt_addr = virt_addr; in ntb_alloc_mw_buffer()
856 mw->dma_addr = dma_addr; in ntb_alloc_mw_buffer()
861 dma_free_coherent(ntb_dev, mw->alloc_size, alloc_addr, dma_addr); in ntb_alloc_mw_buffer()
869 struct ntb_transport_mw *mw = &nt->mw_vec[num_mw]; in ntb_set_mw()
870 struct pci_dev *pdev = nt->ndev->pdev; in ntb_set_mw()
877 return -EINVAL; in ntb_set_mw()
879 rc = ntb_mw_get_align(nt->ndev, PIDX, num_mw, &xlat_align, in ntb_set_mw()
887 /* No need to re-setup */ in ntb_set_mw()
888 if (mw->xlat_size == xlat_size) in ntb_set_mw()
891 if (mw->buff_size) in ntb_set_mw()
895 mw->xlat_size = xlat_size; in ntb_set_mw()
896 mw->buff_size = buff_size; in ntb_set_mw()
897 mw->alloc_size = buff_size; in ntb_set_mw()
899 rc = ntb_alloc_mw_buffer(mw, &pdev->dev, xlat_align); in ntb_set_mw()
901 mw->alloc_size *= 2; in ntb_set_mw()
902 rc = ntb_alloc_mw_buffer(mw, &pdev->dev, xlat_align); in ntb_set_mw()
904 dev_err(&pdev->dev, in ntb_set_mw()
906 mw->xlat_size = 0; in ntb_set_mw()
907 mw->buff_size = 0; in ntb_set_mw()
908 mw->alloc_size = 0; in ntb_set_mw()
913 /* Notify HW the memory location of the receive buffer */ in ntb_set_mw()
914 rc = ntb_mw_set_trans(nt->ndev, PIDX, num_mw, mw->dma_addr, in ntb_set_mw()
915 mw->xlat_size); in ntb_set_mw()
917 dev_err(&pdev->dev, "Unable to set mw%d translation", num_mw); in ntb_set_mw()
919 return -EIO; in ntb_set_mw()
927 qp->link_is_up = false; in ntb_qp_link_context_reset()
928 qp->active = false; in ntb_qp_link_context_reset()
930 qp->tx_index = 0; in ntb_qp_link_context_reset()
931 qp->rx_index = 0; in ntb_qp_link_context_reset()
932 qp->rx_bytes = 0; in ntb_qp_link_context_reset()
933 qp->rx_pkts = 0; in ntb_qp_link_context_reset()
934 qp->rx_ring_empty = 0; in ntb_qp_link_context_reset()
935 qp->rx_err_no_buf = 0; in ntb_qp_link_context_reset()
936 qp->rx_err_oflow = 0; in ntb_qp_link_context_reset()
937 qp->rx_err_ver = 0; in ntb_qp_link_context_reset()
938 qp->rx_memcpy = 0; in ntb_qp_link_context_reset()
939 qp->rx_async = 0; in ntb_qp_link_context_reset()
940 qp->tx_bytes = 0; in ntb_qp_link_context_reset()
941 qp->tx_pkts = 0; in ntb_qp_link_context_reset()
942 qp->tx_ring_full = 0; in ntb_qp_link_context_reset()
943 qp->tx_err_no_buf = 0; in ntb_qp_link_context_reset()
944 qp->tx_memcpy = 0; in ntb_qp_link_context_reset()
945 qp->tx_async = 0; in ntb_qp_link_context_reset()
951 if (qp->remote_rx_info) in ntb_qp_link_down_reset()
952 qp->remote_rx_info->entry = qp->rx_max_entry - 1; in ntb_qp_link_down_reset()
957 struct ntb_transport_ctx *nt = qp->transport; in ntb_qp_link_cleanup()
958 struct pci_dev *pdev = nt->ndev->pdev; in ntb_qp_link_cleanup()
960 dev_info(&pdev->dev, "qp %d: Link Cleanup\n", qp->qp_num); in ntb_qp_link_cleanup()
962 cancel_delayed_work_sync(&qp->link_work); in ntb_qp_link_cleanup()
965 if (qp->event_handler) in ntb_qp_link_cleanup()
966 qp->event_handler(qp->cb_data, qp->link_is_up); in ntb_qp_link_cleanup()
974 struct ntb_transport_ctx *nt = qp->transport; in ntb_qp_link_cleanup_work()
978 if (nt->link_is_up) in ntb_qp_link_cleanup_work()
979 schedule_delayed_work(&qp->link_work, in ntb_qp_link_cleanup_work()
985 schedule_work(&qp->link_cleanup); in ntb_qp_link_down()
994 qp_bitmap_alloc = nt->qp_bitmap & ~nt->qp_bitmap_free; in ntb_transport_link_cleanup()
997 for (i = 0; i < nt->qp_count; i++) in ntb_transport_link_cleanup()
999 qp = &nt->qp_vec[i]; in ntb_transport_link_cleanup()
1001 cancel_work_sync(&qp->link_cleanup); in ntb_transport_link_cleanup()
1002 cancel_delayed_work_sync(&qp->link_work); in ntb_transport_link_cleanup()
1005 if (!nt->link_is_up) in ntb_transport_link_cleanup()
1006 cancel_delayed_work_sync(&nt->link_work); in ntb_transport_link_cleanup()
1008 for (i = 0; i < nt->mw_count; i++) in ntb_transport_link_cleanup()
1015 count = ntb_spad_count(nt->ndev); in ntb_transport_link_cleanup()
1017 ntb_spad_write(nt->ndev, i, 0); in ntb_transport_link_cleanup()
1032 if (ntb_link_is_up(nt->ndev, NULL, NULL) == 1) in ntb_transport_event_callback()
1033 schedule_delayed_work(&nt->link_work, 0); in ntb_transport_event_callback()
1035 schedule_work(&nt->link_cleanup); in ntb_transport_event_callback()
1042 struct ntb_dev *ndev = nt->ndev; in ntb_transport_link_work()
1043 struct pci_dev *pdev = ndev->pdev; in ntb_transport_link_work()
1050 if (nt->use_msi) { in ntb_transport_link_work()
1053 dev_warn(&pdev->dev, in ntb_transport_link_work()
1056 nt->use_msi = false; in ntb_transport_link_work()
1060 for (i = 0; i < nt->qp_count; i++) in ntb_transport_link_work()
1063 for (i = 0; i < nt->mw_count; i++) { in ntb_transport_link_work()
1064 size = nt->mw_vec[i].phys_size; in ntb_transport_link_work()
1076 ntb_peer_spad_write(ndev, PIDX, NUM_MWS, nt->mw_count); in ntb_transport_link_work()
1078 ntb_peer_spad_write(ndev, PIDX, NUM_QPS, nt->qp_count); in ntb_transport_link_work()
1084 dev_dbg(&pdev->dev, "Remote version = %d\n", val); in ntb_transport_link_work()
1089 dev_dbg(&pdev->dev, "Remote max number of qps = %d\n", val); in ntb_transport_link_work()
1090 if (val != nt->qp_count) in ntb_transport_link_work()
1094 dev_dbg(&pdev->dev, "Remote number of mws = %d\n", val); in ntb_transport_link_work()
1095 if (val != nt->mw_count) in ntb_transport_link_work()
1098 for (i = 0; i < nt->mw_count; i++) { in ntb_transport_link_work()
1107 dev_dbg(&pdev->dev, "Remote MW%d size = %#llx\n", i, val64); in ntb_transport_link_work()
1114 nt->link_is_up = true; in ntb_transport_link_work()
1116 for (i = 0; i < nt->qp_count; i++) { in ntb_transport_link_work()
1117 struct ntb_transport_qp *qp = &nt->qp_vec[i]; in ntb_transport_link_work()
1122 if (qp->client_ready) in ntb_transport_link_work()
1123 schedule_delayed_work(&qp->link_work, 0); in ntb_transport_link_work()
1129 for (i = 0; i < nt->mw_count; i++) in ntb_transport_link_work()
1138 schedule_delayed_work(&nt->link_work, in ntb_transport_link_work()
1147 struct pci_dev *pdev = qp->ndev->pdev; in ntb_qp_link_work()
1148 struct ntb_transport_ctx *nt = qp->transport; in ntb_qp_link_work()
1151 WARN_ON(!nt->link_is_up); in ntb_qp_link_work()
1153 val = ntb_spad_read(nt->ndev, QP_LINKS); in ntb_qp_link_work()
1155 ntb_peer_spad_write(nt->ndev, PIDX, QP_LINKS, val | BIT(qp->qp_num)); in ntb_qp_link_work()
1158 dev_dbg_ratelimited(&pdev->dev, "Remote QP link status = %x\n", val); in ntb_qp_link_work()
1161 if (val & BIT(qp->qp_num)) { in ntb_qp_link_work()
1162 dev_info(&pdev->dev, "qp %d: Link Up\n", qp->qp_num); in ntb_qp_link_work()
1163 qp->link_is_up = true; in ntb_qp_link_work()
1164 qp->active = true; in ntb_qp_link_work()
1166 if (qp->event_handler) in ntb_qp_link_work()
1167 qp->event_handler(qp->cb_data, qp->link_is_up); in ntb_qp_link_work()
1169 if (qp->active) in ntb_qp_link_work()
1170 tasklet_schedule(&qp->rxc_db_work); in ntb_qp_link_work()
1171 } else if (nt->link_is_up) in ntb_qp_link_work()
1172 schedule_delayed_work(&qp->link_work, in ntb_qp_link_work()
1186 mw_count = nt->mw_count; in ntb_transport_init_queue()
1187 qp_count = nt->qp_count; in ntb_transport_init_queue()
1191 qp = &nt->qp_vec[qp_num]; in ntb_transport_init_queue()
1192 qp->qp_num = qp_num; in ntb_transport_init_queue()
1193 qp->transport = nt; in ntb_transport_init_queue()
1194 qp->ndev = nt->ndev; in ntb_transport_init_queue()
1195 qp->client_ready = false; in ntb_transport_init_queue()
1196 qp->event_handler = NULL; in ntb_transport_init_queue()
1204 mw_base = nt->mw_vec[mw_num].phys_addr; in ntb_transport_init_queue()
1205 mw_size = nt->mw_vec[mw_num].phys_size; in ntb_transport_init_queue()
1213 qp->tx_mw_size = tx_size; in ntb_transport_init_queue()
1214 qp->tx_mw = nt->mw_vec[mw_num].vbase + qp_offset; in ntb_transport_init_queue()
1215 if (!qp->tx_mw) in ntb_transport_init_queue()
1216 return -EINVAL; in ntb_transport_init_queue()
1218 qp->tx_mw_phys = mw_base + qp_offset; in ntb_transport_init_queue()
1219 if (!qp->tx_mw_phys) in ntb_transport_init_queue()
1220 return -EINVAL; in ntb_transport_init_queue()
1222 tx_size -= sizeof(struct ntb_rx_info); in ntb_transport_init_queue()
1223 qp->rx_info = qp->tx_mw + tx_size; in ntb_transport_init_queue()
1226 qp->tx_max_frame = min(transport_mtu, tx_size / 2); in ntb_transport_init_queue()
1227 qp->tx_max_entry = tx_size / qp->tx_max_frame; in ntb_transport_init_queue()
1229 if (nt->debugfs_node_dir) { in ntb_transport_init_queue()
1233 qp->debugfs_dir = debugfs_create_dir(debugfs_name, in ntb_transport_init_queue()
1234 nt->debugfs_node_dir); in ntb_transport_init_queue()
1236 qp->debugfs_stats = debugfs_create_file("stats", S_IRUSR, in ntb_transport_init_queue()
1237 qp->debugfs_dir, qp, in ntb_transport_init_queue()
1240 qp->debugfs_dir = NULL; in ntb_transport_init_queue()
1241 qp->debugfs_stats = NULL; in ntb_transport_init_queue()
1244 INIT_DELAYED_WORK(&qp->link_work, ntb_qp_link_work); in ntb_transport_init_queue()
1245 INIT_WORK(&qp->link_cleanup, ntb_qp_link_cleanup_work); in ntb_transport_init_queue()
1247 spin_lock_init(&qp->ntb_rx_q_lock); in ntb_transport_init_queue()
1248 spin_lock_init(&qp->ntb_tx_free_q_lock); in ntb_transport_init_queue()
1250 INIT_LIST_HEAD(&qp->rx_post_q); in ntb_transport_init_queue()
1251 INIT_LIST_HEAD(&qp->rx_pend_q); in ntb_transport_init_queue()
1252 INIT_LIST_HEAD(&qp->rx_free_q); in ntb_transport_init_queue()
1253 INIT_LIST_HEAD(&qp->tx_free_q); in ntb_transport_init_queue()
1255 tasklet_init(&qp->rxc_db_work, ntb_transport_rxc_db, in ntb_transport_init_queue()
1272 if (!ndev->ops->mw_set_trans) { in ntb_transport_probe()
1273 dev_err(&ndev->dev, "Inbound MW based NTB API is required\n"); in ntb_transport_probe()
1274 return -EINVAL; in ntb_transport_probe()
1278 dev_dbg(&ndev->dev, in ntb_transport_probe()
1281 dev_dbg(&ndev->dev, in ntb_transport_probe()
1285 dev_warn(&ndev->dev, "Multi-port NTB devices unsupported\n"); in ntb_transport_probe()
1287 node = dev_to_node(&ndev->dev); in ntb_transport_probe()
1291 return -ENOMEM; in ntb_transport_probe()
1293 nt->ndev = ndev; in ntb_transport_probe()
1302 mw_count -= 1; in ntb_transport_probe()
1303 nt->use_msi = true; in ntb_transport_probe()
1312 nt->mw_count = 0; in ntb_transport_probe()
1313 rc = -EINVAL; in ntb_transport_probe()
1317 max_mw_count_for_spads = (spad_count - MW0_SZ_HIGH) / 2; in ntb_transport_probe()
1318 nt->mw_count = min(mw_count, max_mw_count_for_spads); in ntb_transport_probe()
1320 nt->msi_spad_offset = nt->mw_count * 2 + MW0_SZ_HIGH; in ntb_transport_probe()
1322 nt->mw_vec = kcalloc_node(mw_count, sizeof(*nt->mw_vec), in ntb_transport_probe()
1324 if (!nt->mw_vec) { in ntb_transport_probe()
1325 rc = -ENOMEM; in ntb_transport_probe()
1330 mw = &nt->mw_vec[i]; in ntb_transport_probe()
1332 rc = ntb_peer_mw_get_addr(ndev, i, &mw->phys_addr, in ntb_transport_probe()
1333 &mw->phys_size); in ntb_transport_probe()
1337 mw->vbase = ioremap_wc(mw->phys_addr, mw->phys_size); in ntb_transport_probe()
1338 if (!mw->vbase) { in ntb_transport_probe()
1339 rc = -ENOMEM; in ntb_transport_probe()
1343 mw->buff_size = 0; in ntb_transport_probe()
1344 mw->xlat_size = 0; in ntb_transport_probe()
1345 mw->virt_addr = NULL; in ntb_transport_probe()
1346 mw->dma_addr = 0; in ntb_transport_probe()
1352 if (nt->use_msi) { in ntb_transport_probe()
1353 qp_count -= 1; in ntb_transport_probe()
1354 nt->msi_db_mask = 1 << qp_count; in ntb_transport_probe()
1355 ntb_db_clear_mask(ndev, nt->msi_db_mask); in ntb_transport_probe()
1360 else if (nt->mw_count < qp_count) in ntb_transport_probe()
1361 qp_count = nt->mw_count; in ntb_transport_probe()
1363 qp_bitmap &= BIT_ULL(qp_count) - 1; in ntb_transport_probe()
1365 nt->qp_count = qp_count; in ntb_transport_probe()
1366 nt->qp_bitmap = qp_bitmap; in ntb_transport_probe()
1367 nt->qp_bitmap_free = qp_bitmap; in ntb_transport_probe()
1369 nt->qp_vec = kcalloc_node(qp_count, sizeof(*nt->qp_vec), in ntb_transport_probe()
1371 if (!nt->qp_vec) { in ntb_transport_probe()
1372 rc = -ENOMEM; in ntb_transport_probe()
1377 nt->debugfs_node_dir = in ntb_transport_probe()
1378 debugfs_create_dir(pci_name(ndev->pdev), in ntb_transport_probe()
1388 INIT_DELAYED_WORK(&nt->link_work, ntb_transport_link_work); in ntb_transport_probe()
1389 INIT_WORK(&nt->link_cleanup, ntb_transport_link_cleanup_work); in ntb_transport_probe()
1395 INIT_LIST_HEAD(&nt->client_devs); in ntb_transport_probe()
1400 nt->link_is_up = false; in ntb_transport_probe()
1409 kfree(nt->qp_vec); in ntb_transport_probe()
1411 while (i--) { in ntb_transport_probe()
1412 mw = &nt->mw_vec[i]; in ntb_transport_probe()
1413 iounmap(mw->vbase); in ntb_transport_probe()
1415 kfree(nt->mw_vec); in ntb_transport_probe()
1423 struct ntb_transport_ctx *nt = ndev->ctx; in ntb_transport_free()
1429 cancel_work_sync(&nt->link_cleanup); in ntb_transport_free()
1430 cancel_delayed_work_sync(&nt->link_work); in ntb_transport_free()
1432 qp_bitmap_alloc = nt->qp_bitmap & ~nt->qp_bitmap_free; in ntb_transport_free()
1435 for (i = 0; i < nt->qp_count; i++) { in ntb_transport_free()
1436 qp = &nt->qp_vec[i]; in ntb_transport_free()
1439 debugfs_remove_recursive(qp->debugfs_dir); in ntb_transport_free()
1447 for (i = nt->mw_count; i--; ) { in ntb_transport_free()
1449 iounmap(nt->mw_vec[i].vbase); in ntb_transport_free()
1452 kfree(nt->qp_vec); in ntb_transport_free()
1453 kfree(nt->mw_vec); in ntb_transport_free()
1464 spin_lock_irqsave(&qp->ntb_rx_q_lock, irqflags); in ntb_complete_rxc()
1466 while (!list_empty(&qp->rx_post_q)) { in ntb_complete_rxc()
1467 entry = list_first_entry(&qp->rx_post_q, in ntb_complete_rxc()
1469 if (!(entry->flags & DESC_DONE_FLAG)) in ntb_complete_rxc()
1472 entry->rx_hdr->flags = 0; in ntb_complete_rxc()
1473 iowrite32(entry->rx_index, &qp->rx_info->entry); in ntb_complete_rxc()
1475 cb_data = entry->cb_data; in ntb_complete_rxc()
1476 len = entry->len; in ntb_complete_rxc()
1478 list_move_tail(&entry->entry, &qp->rx_free_q); in ntb_complete_rxc()
1480 spin_unlock_irqrestore(&qp->ntb_rx_q_lock, irqflags); in ntb_complete_rxc()
1482 if (qp->rx_handler && qp->client_ready) in ntb_complete_rxc()
1483 qp->rx_handler(qp, qp->cb_data, cb_data, len); in ntb_complete_rxc()
1485 spin_lock_irqsave(&qp->ntb_rx_q_lock, irqflags); in ntb_complete_rxc()
1488 spin_unlock_irqrestore(&qp->ntb_rx_q_lock, irqflags); in ntb_complete_rxc()
1498 enum dmaengine_tx_result dma_err = res->result; in ntb_rx_copy_callback()
1503 entry->errors++; in ntb_rx_copy_callback()
1507 struct ntb_transport_qp *qp = entry->qp; in ntb_rx_copy_callback()
1508 void *offset = qp->rx_buff + qp->rx_max_frame * in ntb_rx_copy_callback() local
1509 qp->rx_index; in ntb_rx_copy_callback()
1511 ntb_memcpy_rx(entry, offset); in ntb_rx_copy_callback()
1512 qp->rx_memcpy++; in ntb_rx_copy_callback()
1522 entry->flags |= DESC_DONE_FLAG; in ntb_rx_copy_callback()
1524 ntb_complete_rxc(entry->qp); in ntb_rx_copy_callback()
1527 static void ntb_memcpy_rx(struct ntb_queue_entry *entry, void *offset) in ntb_memcpy_rx() argument
1529 void *buf = entry->buf; in ntb_memcpy_rx()
1530 size_t len = entry->len; in ntb_memcpy_rx()
1532 memcpy(buf, offset, len); in ntb_memcpy_rx()
1540 static int ntb_async_rx_submit(struct ntb_queue_entry *entry, void *offset) in ntb_async_rx_submit() argument
1543 struct ntb_transport_qp *qp = entry->qp; in ntb_async_rx_submit()
1544 struct dma_chan *chan = qp->rx_dma_chan; in ntb_async_rx_submit()
1549 void *buf = entry->buf; in ntb_async_rx_submit()
1551 len = entry->len; in ntb_async_rx_submit()
1552 device = chan->device; in ntb_async_rx_submit()
1553 pay_off = (size_t)offset & ~PAGE_MASK; in ntb_async_rx_submit()
1559 unmap = dmaengine_get_unmap_data(device->dev, 2, GFP_NOWAIT); in ntb_async_rx_submit()
1563 unmap->len = len; in ntb_async_rx_submit()
1564 unmap->addr[0] = dma_map_page(device->dev, virt_to_page(offset), in ntb_async_rx_submit()
1566 if (dma_mapping_error(device->dev, unmap->addr[0])) in ntb_async_rx_submit()
1569 unmap->to_cnt = 1; in ntb_async_rx_submit()
1571 unmap->addr[1] = dma_map_page(device->dev, virt_to_page(buf), in ntb_async_rx_submit()
1573 if (dma_mapping_error(device->dev, unmap->addr[1])) in ntb_async_rx_submit()
1576 unmap->from_cnt = 1; in ntb_async_rx_submit()
1578 txd = device->device_prep_dma_memcpy(chan, unmap->addr[1], in ntb_async_rx_submit()
1579 unmap->addr[0], len, in ntb_async_rx_submit()
1584 txd->callback_result = ntb_rx_copy_callback; in ntb_async_rx_submit()
1585 txd->callback_param = entry; in ntb_async_rx_submit()
1594 qp->last_cookie = cookie; in ntb_async_rx_submit()
1596 qp->rx_async++; in ntb_async_rx_submit()
1605 return -ENXIO; in ntb_async_rx_submit()
1608 static void ntb_async_rx(struct ntb_queue_entry *entry, void *offset) in ntb_async_rx() argument
1610 struct ntb_transport_qp *qp = entry->qp; in ntb_async_rx()
1611 struct dma_chan *chan = qp->rx_dma_chan; in ntb_async_rx()
1617 if (entry->len < copy_bytes) in ntb_async_rx()
1620 res = ntb_async_rx_submit(entry, offset); in ntb_async_rx()
1624 if (!entry->retries) in ntb_async_rx()
1625 qp->rx_async++; in ntb_async_rx()
1630 ntb_memcpy_rx(entry, offset); in ntb_async_rx()
1631 qp->rx_memcpy++; in ntb_async_rx()
1638 void *offset; in ntb_process_rxc() local
1640 offset = qp->rx_buff + qp->rx_max_frame * qp->rx_index; in ntb_process_rxc()
1641 hdr = offset + qp->rx_max_frame - sizeof(struct ntb_payload_header); in ntb_process_rxc()
1643 dev_dbg(&qp->ndev->pdev->dev, "qp %d: RX ver %u len %d flags %x\n", in ntb_process_rxc()
1644 qp->qp_num, hdr->ver, hdr->len, hdr->flags); in ntb_process_rxc()
1646 if (!(hdr->flags & DESC_DONE_FLAG)) { in ntb_process_rxc()
1647 dev_dbg(&qp->ndev->pdev->dev, "done flag not set\n"); in ntb_process_rxc()
1648 qp->rx_ring_empty++; in ntb_process_rxc()
1649 return -EAGAIN; in ntb_process_rxc()
1652 if (hdr->flags & LINK_DOWN_FLAG) { in ntb_process_rxc()
1653 dev_dbg(&qp->ndev->pdev->dev, "link down flag set\n"); in ntb_process_rxc()
1655 hdr->flags = 0; in ntb_process_rxc()
1656 return -EAGAIN; in ntb_process_rxc()
1659 if (hdr->ver != (u32)qp->rx_pkts) { in ntb_process_rxc()
1660 dev_dbg(&qp->ndev->pdev->dev, in ntb_process_rxc()
1661 "version mismatch, expected %llu - got %u\n", in ntb_process_rxc()
1662 qp->rx_pkts, hdr->ver); in ntb_process_rxc()
1663 qp->rx_err_ver++; in ntb_process_rxc()
1664 return -EIO; in ntb_process_rxc()
1667 entry = ntb_list_mv(&qp->ntb_rx_q_lock, &qp->rx_pend_q, &qp->rx_post_q); in ntb_process_rxc()
1669 dev_dbg(&qp->ndev->pdev->dev, "no receive buffer\n"); in ntb_process_rxc()
1670 qp->rx_err_no_buf++; in ntb_process_rxc()
1671 return -EAGAIN; in ntb_process_rxc()
1674 entry->rx_hdr = hdr; in ntb_process_rxc()
1675 entry->rx_index = qp->rx_index; in ntb_process_rxc()
1677 if (hdr->len > entry->len) { in ntb_process_rxc()
1678 dev_dbg(&qp->ndev->pdev->dev, in ntb_process_rxc()
1679 "receive buffer overflow! Wanted %d got %d\n", in ntb_process_rxc()
1680 hdr->len, entry->len); in ntb_process_rxc()
1681 qp->rx_err_oflow++; in ntb_process_rxc()
1683 entry->len = -EIO; in ntb_process_rxc()
1684 entry->flags |= DESC_DONE_FLAG; in ntb_process_rxc()
1688 dev_dbg(&qp->ndev->pdev->dev, in ntb_process_rxc()
1690 qp->rx_index, hdr->ver, hdr->len, entry->len); in ntb_process_rxc()
1692 qp->rx_bytes += hdr->len; in ntb_process_rxc()
1693 qp->rx_pkts++; in ntb_process_rxc()
1695 entry->len = hdr->len; in ntb_process_rxc()
1697 ntb_async_rx(entry, offset); in ntb_process_rxc()
1700 qp->rx_index++; in ntb_process_rxc()
1701 qp->rx_index %= qp->rx_max_entry; in ntb_process_rxc()
1711 dev_dbg(&qp->ndev->pdev->dev, "%s: doorbell %d received\n", in ntb_transport_rxc_db()
1712 __func__, qp->qp_num); in ntb_transport_rxc_db()
1717 for (i = 0; i < qp->rx_max_entry; i++) { in ntb_transport_rxc_db()
1723 if (i && qp->rx_dma_chan) in ntb_transport_rxc_db()
1724 dma_async_issue_pending(qp->rx_dma_chan); in ntb_transport_rxc_db()
1726 if (i == qp->rx_max_entry) { in ntb_transport_rxc_db()
1728 if (qp->active) in ntb_transport_rxc_db()
1729 tasklet_schedule(&qp->rxc_db_work); in ntb_transport_rxc_db()
1730 } else if (ntb_db_read(qp->ndev) & BIT_ULL(qp->qp_num)) { in ntb_transport_rxc_db()
1732 ntb_db_clear(qp->ndev, BIT_ULL(qp->qp_num)); in ntb_transport_rxc_db()
1734 ntb_db_read(qp->ndev); in ntb_transport_rxc_db()
1740 if (qp->active) in ntb_transport_rxc_db()
1741 tasklet_schedule(&qp->rxc_db_work); in ntb_transport_rxc_db()
1749 struct ntb_transport_qp *qp = entry->qp; in ntb_tx_copy_callback()
1750 struct ntb_payload_header __iomem *hdr = entry->tx_hdr; in ntb_tx_copy_callback()
1754 enum dmaengine_tx_result dma_err = res->result; in ntb_tx_copy_callback()
1759 entry->errors++; in ntb_tx_copy_callback()
1763 void __iomem *offset = in ntb_tx_copy_callback() local
1764 qp->tx_mw + qp->tx_max_frame * in ntb_tx_copy_callback()
1765 entry->tx_index; in ntb_tx_copy_callback()
1768 ntb_memcpy_tx(entry, offset); in ntb_tx_copy_callback()
1769 qp->tx_memcpy++; in ntb_tx_copy_callback()
1779 iowrite32(entry->flags | DESC_DONE_FLAG, &hdr->flags); in ntb_tx_copy_callback()
1781 if (qp->use_msi) in ntb_tx_copy_callback()
1782 ntb_msi_peer_trigger(qp->ndev, PIDX, &qp->peer_msi_desc); in ntb_tx_copy_callback()
1784 ntb_peer_db_set(qp->ndev, BIT_ULL(qp->qp_num)); in ntb_tx_copy_callback()
1790 if (entry->len > 0) { in ntb_tx_copy_callback()
1791 qp->tx_bytes += entry->len; in ntb_tx_copy_callback()
1793 if (qp->tx_handler) in ntb_tx_copy_callback()
1794 qp->tx_handler(qp, qp->cb_data, entry->cb_data, in ntb_tx_copy_callback()
1795 entry->len); in ntb_tx_copy_callback()
1798 ntb_list_add(&qp->ntb_tx_free_q_lock, &entry->entry, &qp->tx_free_q); in ntb_tx_copy_callback()
1801 static void ntb_memcpy_tx(struct ntb_queue_entry *entry, void __iomem *offset) in ntb_memcpy_tx() argument
1805 * Using non-temporal mov to improve performance on non-cached in ntb_memcpy_tx()
1808 __copy_from_user_inatomic_nocache(offset, entry->buf, entry->len); in ntb_memcpy_tx()
1810 memcpy_toio(offset, entry->buf, entry->len); in ntb_memcpy_tx()
1823 struct dma_chan *chan = qp->tx_dma_chan; in ntb_async_tx_submit()
1825 size_t len = entry->len; in ntb_async_tx_submit()
1826 void *buf = entry->buf; in ntb_async_tx_submit()
1832 device = chan->device; in ntb_async_tx_submit()
1833 dest = qp->tx_mw_dma_addr + qp->tx_max_frame * entry->tx_index; in ntb_async_tx_submit()
1840 unmap = dmaengine_get_unmap_data(device->dev, 1, GFP_NOWAIT); in ntb_async_tx_submit()
1844 unmap->len = len; in ntb_async_tx_submit()
1845 unmap->addr[0] = dma_map_page(device->dev, virt_to_page(buf), in ntb_async_tx_submit()
1847 if (dma_mapping_error(device->dev, unmap->addr[0])) in ntb_async_tx_submit()
1850 unmap->to_cnt = 1; in ntb_async_tx_submit()
1852 txd = device->device_prep_dma_memcpy(chan, dest, unmap->addr[0], len, in ntb_async_tx_submit()
1857 txd->callback_result = ntb_tx_copy_callback; in ntb_async_tx_submit()
1858 txd->callback_param = entry; in ntb_async_tx_submit()
1875 return -ENXIO; in ntb_async_tx_submit()
1882 struct dma_chan *chan = qp->tx_dma_chan; in ntb_async_tx()
1883 void __iomem *offset; in ntb_async_tx() local
1886 entry->tx_index = qp->tx_index; in ntb_async_tx()
1887 offset = qp->tx_mw + qp->tx_max_frame * entry->tx_index; in ntb_async_tx()
1888 hdr = offset + qp->tx_max_frame - sizeof(struct ntb_payload_header); in ntb_async_tx()
1889 entry->tx_hdr = hdr; in ntb_async_tx()
1891 iowrite32(entry->len, &hdr->len); in ntb_async_tx()
1892 iowrite32((u32)qp->tx_pkts, &hdr->ver); in ntb_async_tx()
1897 if (entry->len < copy_bytes) in ntb_async_tx()
1904 if (!entry->retries) in ntb_async_tx()
1905 qp->tx_async++; in ntb_async_tx()
1910 ntb_memcpy_tx(entry, offset); in ntb_async_tx()
1911 qp->tx_memcpy++; in ntb_async_tx()
1918 qp->tx_ring_full++; in ntb_process_tx()
1919 return -EAGAIN; in ntb_process_tx()
1922 if (entry->len > qp->tx_max_frame - sizeof(struct ntb_payload_header)) { in ntb_process_tx()
1923 if (qp->tx_handler) in ntb_process_tx()
1924 qp->tx_handler(qp, qp->cb_data, NULL, -EIO); in ntb_process_tx()
1926 ntb_list_add(&qp->ntb_tx_free_q_lock, &entry->entry, in ntb_process_tx()
1927 &qp->tx_free_q); in ntb_process_tx()
1933 qp->tx_index++; in ntb_process_tx()
1934 qp->tx_index %= qp->tx_max_entry; in ntb_process_tx()
1936 qp->tx_pkts++; in ntb_process_tx()
1943 struct pci_dev *pdev = qp->ndev->pdev; in ntb_send_link_down()
1947 if (!qp->link_is_up) in ntb_send_link_down()
1950 dev_info(&pdev->dev, "qp %d: Send Link Down\n", qp->qp_num); in ntb_send_link_down()
1953 entry = ntb_list_rm(&qp->ntb_tx_free_q_lock, &qp->tx_free_q); in ntb_send_link_down()
1962 entry->cb_data = NULL; in ntb_send_link_down()
1963 entry->buf = NULL; in ntb_send_link_down()
1964 entry->len = 0; in ntb_send_link_down()
1965 entry->flags = LINK_DOWN_FLAG; in ntb_send_link_down()
1969 dev_err(&pdev->dev, "ntb: QP%d unable to send linkdown msg\n", in ntb_send_link_down()
1970 qp->qp_num); in ntb_send_link_down()
1977 return dev_to_node(&chan->dev->device) == (int)(unsigned long)node; in ntb_dma_filter_fn()
1981 * ntb_transport_create_queue - Create a new NTB transport layer queue
1986 * Create a new NTB transport layer queue and provide the queue with a callback
2009 ndev = dev_ntb(client_dev->parent); in ntb_transport_create_queue()
2010 pdev = ndev->pdev; in ntb_transport_create_queue()
2011 nt = ndev->ctx; in ntb_transport_create_queue()
2013 node = dev_to_node(&ndev->dev); in ntb_transport_create_queue()
2015 free_queue = ffs(nt->qp_bitmap_free); in ntb_transport_create_queue()
2020 free_queue--; in ntb_transport_create_queue()
2022 qp = &nt->qp_vec[free_queue]; in ntb_transport_create_queue()
2023 qp_bit = BIT_ULL(qp->qp_num); in ntb_transport_create_queue()
2025 nt->qp_bitmap_free &= ~qp_bit; in ntb_transport_create_queue()
2027 qp->cb_data = data; in ntb_transport_create_queue()
2028 qp->rx_handler = handlers->rx_handler; in ntb_transport_create_queue()
2029 qp->tx_handler = handlers->tx_handler; in ntb_transport_create_queue()
2030 qp->event_handler = handlers->event_handler; in ntb_transport_create_queue()
2036 qp->tx_dma_chan = in ntb_transport_create_queue()
2039 if (!qp->tx_dma_chan) in ntb_transport_create_queue()
2040 dev_info(&pdev->dev, "Unable to allocate TX DMA channel\n"); in ntb_transport_create_queue()
2042 qp->rx_dma_chan = in ntb_transport_create_queue()
2045 if (!qp->rx_dma_chan) in ntb_transport_create_queue()
2046 dev_info(&pdev->dev, "Unable to allocate RX DMA channel\n"); in ntb_transport_create_queue()
2048 qp->tx_dma_chan = NULL; in ntb_transport_create_queue()
2049 qp->rx_dma_chan = NULL; in ntb_transport_create_queue()
2052 qp->tx_mw_dma_addr = 0; in ntb_transport_create_queue()
2053 if (qp->tx_dma_chan) { in ntb_transport_create_queue()
2054 qp->tx_mw_dma_addr = in ntb_transport_create_queue()
2055 dma_map_resource(qp->tx_dma_chan->device->dev, in ntb_transport_create_queue()
2056 qp->tx_mw_phys, qp->tx_mw_size, in ntb_transport_create_queue()
2058 if (dma_mapping_error(qp->tx_dma_chan->device->dev, in ntb_transport_create_queue()
2059 qp->tx_mw_dma_addr)) { in ntb_transport_create_queue()
2060 qp->tx_mw_dma_addr = 0; in ntb_transport_create_queue()
2065 dev_dbg(&pdev->dev, "Using %s memcpy for TX\n", in ntb_transport_create_queue()
2066 qp->tx_dma_chan ? "DMA" : "CPU"); in ntb_transport_create_queue()
2068 dev_dbg(&pdev->dev, "Using %s memcpy for RX\n", in ntb_transport_create_queue()
2069 qp->rx_dma_chan ? "DMA" : "CPU"); in ntb_transport_create_queue()
2076 entry->qp = qp; in ntb_transport_create_queue()
2077 ntb_list_add(&qp->ntb_rx_q_lock, &entry->entry, in ntb_transport_create_queue()
2078 &qp->rx_free_q); in ntb_transport_create_queue()
2080 qp->rx_alloc_entry = NTB_QP_DEF_NUM_ENTRIES; in ntb_transport_create_queue()
2082 for (i = 0; i < qp->tx_max_entry; i++) { in ntb_transport_create_queue()
2087 entry->qp = qp; in ntb_transport_create_queue()
2088 ntb_list_add(&qp->ntb_tx_free_q_lock, &entry->entry, in ntb_transport_create_queue()
2089 &qp->tx_free_q); in ntb_transport_create_queue()
2092 ntb_db_clear(qp->ndev, qp_bit); in ntb_transport_create_queue()
2093 ntb_db_clear_mask(qp->ndev, qp_bit); in ntb_transport_create_queue()
2095 dev_info(&pdev->dev, "NTB Transport QP %d created\n", qp->qp_num); in ntb_transport_create_queue()
2100 while ((entry = ntb_list_rm(&qp->ntb_tx_free_q_lock, &qp->tx_free_q))) in ntb_transport_create_queue()
2103 qp->rx_alloc_entry = 0; in ntb_transport_create_queue()
2104 while ((entry = ntb_list_rm(&qp->ntb_rx_q_lock, &qp->rx_free_q))) in ntb_transport_create_queue()
2106 if (qp->tx_mw_dma_addr) in ntb_transport_create_queue()
2107 dma_unmap_resource(qp->tx_dma_chan->device->dev, in ntb_transport_create_queue()
2108 qp->tx_mw_dma_addr, qp->tx_mw_size, in ntb_transport_create_queue()
2110 if (qp->tx_dma_chan) in ntb_transport_create_queue()
2111 dma_release_channel(qp->tx_dma_chan); in ntb_transport_create_queue()
2112 if (qp->rx_dma_chan) in ntb_transport_create_queue()
2113 dma_release_channel(qp->rx_dma_chan); in ntb_transport_create_queue()
2114 nt->qp_bitmap_free |= qp_bit; in ntb_transport_create_queue()
2121 * ntb_transport_free_queue - Frees NTB transport queue
2135 pdev = qp->ndev->pdev; in ntb_transport_free_queue()
2137 qp->active = false; in ntb_transport_free_queue()
2139 if (qp->tx_dma_chan) { in ntb_transport_free_queue()
2140 struct dma_chan *chan = qp->tx_dma_chan; in ntb_transport_free_queue()
2144 qp->tx_dma_chan = NULL; in ntb_transport_free_queue()
2149 dma_sync_wait(chan, qp->last_cookie); in ntb_transport_free_queue()
2152 dma_unmap_resource(chan->device->dev, in ntb_transport_free_queue()
2153 qp->tx_mw_dma_addr, qp->tx_mw_size, in ntb_transport_free_queue()
2159 if (qp->rx_dma_chan) { in ntb_transport_free_queue()
2160 struct dma_chan *chan = qp->rx_dma_chan; in ntb_transport_free_queue()
2164 qp->rx_dma_chan = NULL; in ntb_transport_free_queue()
2169 dma_sync_wait(chan, qp->last_cookie); in ntb_transport_free_queue()
2174 qp_bit = BIT_ULL(qp->qp_num); in ntb_transport_free_queue()
2176 ntb_db_set_mask(qp->ndev, qp_bit); in ntb_transport_free_queue()
2177 tasklet_kill(&qp->rxc_db_work); in ntb_transport_free_queue()
2179 cancel_delayed_work_sync(&qp->link_work); in ntb_transport_free_queue()
2181 qp->cb_data = NULL; in ntb_transport_free_queue()
2182 qp->rx_handler = NULL; in ntb_transport_free_queue()
2183 qp->tx_handler = NULL; in ntb_transport_free_queue()
2184 qp->event_handler = NULL; in ntb_transport_free_queue()
2186 while ((entry = ntb_list_rm(&qp->ntb_rx_q_lock, &qp->rx_free_q))) in ntb_transport_free_queue()
2189 while ((entry = ntb_list_rm(&qp->ntb_rx_q_lock, &qp->rx_pend_q))) { in ntb_transport_free_queue()
2190 dev_warn(&pdev->dev, "Freeing item from non-empty rx_pend_q\n"); in ntb_transport_free_queue()
2194 while ((entry = ntb_list_rm(&qp->ntb_rx_q_lock, &qp->rx_post_q))) { in ntb_transport_free_queue()
2195 dev_warn(&pdev->dev, "Freeing item from non-empty rx_post_q\n"); in ntb_transport_free_queue()
2199 while ((entry = ntb_list_rm(&qp->ntb_tx_free_q_lock, &qp->tx_free_q))) in ntb_transport_free_queue()
2202 qp->transport->qp_bitmap_free |= qp_bit; in ntb_transport_free_queue()
2204 dev_info(&pdev->dev, "NTB Transport QP %d freed\n", qp->qp_num); in ntb_transport_free_queue()
2209 * ntb_transport_rx_remove - Dequeues enqueued rx packet
2223 if (!qp || qp->client_ready) in ntb_transport_rx_remove()
2226 entry = ntb_list_rm(&qp->ntb_rx_q_lock, &qp->rx_pend_q); in ntb_transport_rx_remove()
2230 buf = entry->cb_data; in ntb_transport_rx_remove()
2231 *len = entry->len; in ntb_transport_rx_remove()
2233 ntb_list_add(&qp->ntb_rx_q_lock, &entry->entry, &qp->rx_free_q); in ntb_transport_rx_remove()
2240 * ntb_transport_rx_enqueue - Enqueue a new NTB queue entry
2241 * @qp: NTB transport layer queue the entry is to be enqueued on
2242 * @cb: per buffer pointer for callback function to use
2243 * @data: pointer to data buffer that incoming packets will be copied into
2244 * @len: length of the data buffer
2246 * Enqueue a new receive buffer onto the transport queue into which a NTB
2249 * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
2257 return -EINVAL; in ntb_transport_rx_enqueue()
2259 entry = ntb_list_rm(&qp->ntb_rx_q_lock, &qp->rx_free_q); in ntb_transport_rx_enqueue()
2261 return -ENOMEM; in ntb_transport_rx_enqueue()
2263 entry->cb_data = cb; in ntb_transport_rx_enqueue()
2264 entry->buf = data; in ntb_transport_rx_enqueue()
2265 entry->len = len; in ntb_transport_rx_enqueue()
2266 entry->flags = 0; in ntb_transport_rx_enqueue()
2267 entry->retries = 0; in ntb_transport_rx_enqueue()
2268 entry->errors = 0; in ntb_transport_rx_enqueue()
2269 entry->rx_index = 0; in ntb_transport_rx_enqueue()
2271 ntb_list_add(&qp->ntb_rx_q_lock, &entry->entry, &qp->rx_pend_q); in ntb_transport_rx_enqueue()
2273 if (qp->active) in ntb_transport_rx_enqueue()
2274 tasklet_schedule(&qp->rxc_db_work); in ntb_transport_rx_enqueue()
2281 * ntb_transport_tx_enqueue - Enqueue a new NTB queue entry
2282 * @qp: NTB transport layer queue the entry is to be enqueued on
2283 * @cb: per buffer pointer for callback function to use
2284 * @data: pointer to data buffer that will be sent
2285 * @len: length of the data buffer
2287 * Enqueue a new transmit buffer onto the transport queue from which a NTB
2291 * RETURNS: An appropriate -ERRNO error value on error, or zero for success.
2300 return -EINVAL; in ntb_transport_tx_enqueue()
2303 if (!qp->link_is_up) in ntb_transport_tx_enqueue()
2306 entry = ntb_list_rm(&qp->ntb_tx_free_q_lock, &qp->tx_free_q); in ntb_transport_tx_enqueue()
2308 qp->tx_err_no_buf++; in ntb_transport_tx_enqueue()
2309 return -EBUSY; in ntb_transport_tx_enqueue()
2312 entry->cb_data = cb; in ntb_transport_tx_enqueue()
2313 entry->buf = data; in ntb_transport_tx_enqueue()
2314 entry->len = len; in ntb_transport_tx_enqueue()
2315 entry->flags = 0; in ntb_transport_tx_enqueue()
2316 entry->errors = 0; in ntb_transport_tx_enqueue()
2317 entry->retries = 0; in ntb_transport_tx_enqueue()
2318 entry->tx_index = 0; in ntb_transport_tx_enqueue()
2322 ntb_list_add(&qp->ntb_tx_free_q_lock, &entry->entry, in ntb_transport_tx_enqueue()
2323 &qp->tx_free_q); in ntb_transport_tx_enqueue()
2330 * ntb_transport_link_up - Notify NTB transport of client readiness to use queue
2331 * @qp: NTB transport layer queue to be enabled
2333 * Notify NTB transport layer of client readiness to use queue
2340 qp->client_ready = true; in ntb_transport_link_up()
2342 if (qp->transport->link_is_up) in ntb_transport_link_up()
2343 schedule_delayed_work(&qp->link_work, 0); in ntb_transport_link_up()
2348 * ntb_transport_link_down - Notify NTB transport to no longer enqueue data
2349 * @qp: NTB transport layer queue to be disabled
2351 * Notify NTB transport layer of client's desire to no longer receive data on
2362 qp->client_ready = false; in ntb_transport_link_down()
2364 val = ntb_spad_read(qp->ndev, QP_LINKS); in ntb_transport_link_down()
2366 ntb_peer_spad_write(qp->ndev, PIDX, QP_LINKS, val & ~BIT(qp->qp_num)); in ntb_transport_link_down()
2368 if (qp->link_is_up) in ntb_transport_link_down()
2371 cancel_delayed_work_sync(&qp->link_work); in ntb_transport_link_down()
2376 * ntb_transport_link_query - Query transport link state
2377 * @qp: NTB transport layer queue to be queried
2388 return qp->link_is_up; in ntb_transport_link_query()
2393 * ntb_transport_qp_num - Query the qp number
2394 * @qp: NTB transport layer queue to be queried
2405 return qp->qp_num; in ntb_transport_qp_num()
2410 * ntb_transport_max_size - Query the max payload size of a qp
2411 * @qp: NTB transport layer queue to be queried
2426 rx_chan = qp->rx_dma_chan; in ntb_transport_max_size()
2427 tx_chan = qp->tx_dma_chan; in ntb_transport_max_size()
2429 copy_align = max(rx_chan ? rx_chan->device->copy_align : 0, in ntb_transport_max_size()
2430 tx_chan ? tx_chan->device->copy_align : 0); in ntb_transport_max_size()
2433 max_size = qp->tx_max_frame - sizeof(struct ntb_payload_header); in ntb_transport_max_size()
2442 unsigned int head = qp->tx_index; in ntb_transport_tx_free_entry()
2443 unsigned int tail = qp->remote_rx_info->entry; in ntb_transport_tx_free_entry()
2445 return tail >= head ? tail - head : qp->tx_max_entry + tail - head; in ntb_transport_tx_free_entry()
2456 if (ntb_db_read(nt->ndev) & nt->msi_db_mask) { in ntb_transport_doorbell_callback()
2458 ntb_db_clear(nt->ndev, nt->msi_db_mask); in ntb_transport_doorbell_callback()
2461 db_bits = (nt->qp_bitmap & ~nt->qp_bitmap_free & in ntb_transport_doorbell_callback()
2462 ntb_db_vector_mask(nt->ndev, vector)); in ntb_transport_doorbell_callback()
2466 qp = &nt->qp_vec[qp_num]; in ntb_transport_doorbell_callback()
2468 if (qp->active) in ntb_transport_doorbell_callback()
2469 tasklet_schedule(&qp->rxc_db_work); in ntb_transport_doorbell_callback()