Lines Matching refs:qp
120 struct ntb_transport_qp *qp;
148 void (*tx_handler)(struct ntb_transport_qp *qp, void *qp_data,
160 void (*rx_handler)(struct ntb_transport_qp *qp, void *qp_data,
272 #define QP_TO_MW(nt, qp) ((qp) % nt->mw_count)
279 static int ntb_async_tx_submit(struct ntb_transport_qp *qp,
466 struct ntb_transport_qp *qp;
470 qp = filp->private_data;
472 if (!qp || !qp->link_is_up)
485 "rx_bytes - \t%llu\n", qp->rx_bytes);
487 "rx_pkts - \t%llu\n", qp->rx_pkts);
489 "rx_memcpy - \t%llu\n", qp->rx_memcpy);
491 "rx_async - \t%llu\n", qp->rx_async);
493 "rx_ring_empty - %llu\n", qp->rx_ring_empty);
495 "rx_err_no_buf - %llu\n", qp->rx_err_no_buf);
497 "rx_err_oflow - \t%llu\n", qp->rx_err_oflow);
499 "rx_err_ver - \t%llu\n", qp->rx_err_ver);
501 "rx_buff - \t0x%p\n", qp->rx_buff);
503 "rx_index - \t%u\n", qp->rx_index);
505 "rx_max_entry - \t%u\n", qp->rx_max_entry);
507 "rx_alloc_entry - \t%u\n\n", qp->rx_alloc_entry);
510 "tx_bytes - \t%llu\n", qp->tx_bytes);
512 "tx_pkts - \t%llu\n", qp->tx_pkts);
514 "tx_memcpy - \t%llu\n", qp->tx_memcpy);
516 "tx_async - \t%llu\n", qp->tx_async);
518 "tx_ring_full - \t%llu\n", qp->tx_ring_full);
520 "tx_err_no_buf - %llu\n", qp->tx_err_no_buf);
522 "tx_mw - \t0x%p\n", qp->tx_mw);
524 "tx_index (H) - \t%u\n", qp->tx_index);
527 qp->remote_rx_info->entry);
529 "tx_max_entry - \t%u\n", qp->tx_max_entry);
532 ntb_transport_tx_free_entry(qp));
538 qp->tx_dma_chan ? "Yes" : "No");
541 qp->rx_dma_chan ? "Yes" : "No");
544 qp->link_is_up ? "Up" : "Down");
616 struct ntb_transport_qp *qp = &nt->qp_vec[qp_num];
640 qp->rx_buff = mw->virt_addr + rx_size * (qp_num / mw_count);
643 qp->remote_rx_info = qp->rx_buff + rx_size;
646 qp->rx_max_frame = min(transport_mtu, rx_size / 2);
647 qp->rx_max_entry = rx_size / qp->rx_max_frame;
648 qp->rx_index = 0;
656 for (i = qp->rx_alloc_entry; i < qp->rx_max_entry; i++) {
661 entry->qp = qp;
662 ntb_list_add(&qp->ntb_rx_q_lock, &entry->entry,
663 &qp->rx_free_q);
664 qp->rx_alloc_entry++;
667 qp->remote_rx_info->entry = qp->rx_max_entry - 1;
670 for (i = 0; i < qp->rx_max_entry; i++) {
671 void *offset = (qp->rx_buff + qp->rx_max_frame * (i + 1) -
676 qp->rx_pkts = 0;
677 qp->tx_pkts = 0;
678 qp->tx_index = 0;
685 struct ntb_transport_qp *qp = dev;
687 tasklet_schedule(&qp->rxc_db_work);
695 struct ntb_transport_qp *qp = &nt->qp_vec[qp_num];
704 qp->peer_msi_desc.addr_offset =
705 ntb_peer_spad_read(qp->ndev, PIDX, spad);
706 qp->peer_msi_desc.data =
707 ntb_peer_spad_read(qp->ndev, PIDX, spad + 1);
709 dev_dbg(&qp->ndev->pdev->dev, "QP%d Peer MSI addr=%x data=%x\n",
710 qp_num, qp->peer_msi_desc.addr_offset, qp->peer_msi_desc.data);
712 if (qp->peer_msi_desc.addr_offset) {
713 qp->use_msi = true;
714 dev_info(&qp->ndev->pdev->dev,
722 struct ntb_transport_qp *qp = &nt->qp_vec[qp_num];
730 dev_warn_once(&qp->ndev->pdev->dev,
735 ntb_spad_write(qp->ndev, spad, 0);
736 ntb_spad_write(qp->ndev, spad + 1, 0);
738 if (!qp->msi_irq) {
739 qp->msi_irq = ntbm_msi_request_irq(qp->ndev, ntb_transport_isr,
740 KBUILD_MODNAME, qp,
741 &qp->msi_desc);
742 if (qp->msi_irq < 0) {
743 dev_warn(&qp->ndev->pdev->dev,
744 "Unable to allocate MSI interrupt for qp%d\n",
750 rc = ntb_spad_write(qp->ndev, spad, qp->msi_desc.addr_offset);
754 rc = ntb_spad_write(qp->ndev, spad + 1, qp->msi_desc.data);
758 dev_dbg(&qp->ndev->pdev->dev, "QP%d MSI %d addr=%x data=%x\n",
759 qp_num, qp->msi_irq, qp->msi_desc.addr_offset,
760 qp->msi_desc.data);
765 devm_free_irq(&nt->ndev->dev, qp->msi_irq, qp);
912 static void ntb_qp_link_context_reset(struct ntb_transport_qp *qp)
914 qp->link_is_up = false;
915 qp->active = false;
917 qp->tx_index = 0;
918 qp->rx_index = 0;
919 qp->rx_bytes = 0;
920 qp->rx_pkts = 0;
921 qp->rx_ring_empty = 0;
922 qp->rx_err_no_buf = 0;
923 qp->rx_err_oflow = 0;
924 qp->rx_err_ver = 0;
925 qp->rx_memcpy = 0;
926 qp->rx_async = 0;
927 qp->tx_bytes = 0;
928 qp->tx_pkts = 0;
929 qp->tx_ring_full = 0;
930 qp->tx_err_no_buf = 0;
931 qp->tx_memcpy = 0;
932 qp->tx_async = 0;
935 static void ntb_qp_link_down_reset(struct ntb_transport_qp *qp)
937 ntb_qp_link_context_reset(qp);
938 if (qp->remote_rx_info)
939 qp->remote_rx_info->entry = qp->rx_max_entry - 1;
942 static void ntb_qp_link_cleanup(struct ntb_transport_qp *qp)
944 struct ntb_transport_ctx *nt = qp->transport;
947 dev_info(&pdev->dev, "qp %d: Link Cleanup\n", qp->qp_num);
949 cancel_delayed_work_sync(&qp->link_work);
950 ntb_qp_link_down_reset(qp);
952 if (qp->event_handler)
953 qp->event_handler(qp->cb_data, qp->link_is_up);
958 struct ntb_transport_qp *qp = container_of(work,
961 struct ntb_transport_ctx *nt = qp->transport;
963 ntb_qp_link_cleanup(qp);
966 schedule_delayed_work(&qp->link_work,
970 static void ntb_qp_link_down(struct ntb_transport_qp *qp)
972 schedule_work(&qp->link_cleanup);
977 struct ntb_transport_qp *qp;
986 qp = &nt->qp_vec[i];
987 ntb_qp_link_cleanup(qp);
988 cancel_work_sync(&qp->link_cleanup);
989 cancel_delayed_work_sync(&qp->link_work);
1104 struct ntb_transport_qp *qp = &nt->qp_vec[i];
1109 if (qp->client_ready)
1110 schedule_delayed_work(&qp->link_work, 0);
1131 struct ntb_transport_qp *qp = container_of(work,
1134 struct pci_dev *pdev = qp->ndev->pdev;
1135 struct ntb_transport_ctx *nt = qp->transport;
1142 ntb_peer_spad_write(nt->ndev, PIDX, QP_LINKS, val | BIT(qp->qp_num));
1144 /* query remote spad for qp ready bits */
1148 if (val & BIT(qp->qp_num)) {
1149 dev_info(&pdev->dev, "qp %d: Link Up\n", qp->qp_num);
1150 qp->link_is_up = true;
1151 qp->active = true;
1153 if (qp->event_handler)
1154 qp->event_handler(qp->cb_data, qp->link_is_up);
1156 if (qp->active)
1157 tasklet_schedule(&qp->rxc_db_work);
1159 schedule_delayed_work(&qp->link_work,
1166 struct ntb_transport_qp *qp;
1178 qp = &nt->qp_vec[qp_num];
1179 qp->qp_num = qp_num;
1180 qp->transport = nt;
1181 qp->ndev = nt->ndev;
1182 qp->client_ready = false;
1183 qp->event_handler = NULL;
1184 ntb_qp_link_context_reset(qp);
1200 qp->tx_mw_size = tx_size;
1201 qp->tx_mw = nt->mw_vec[mw_num].vbase + qp_offset;
1202 if (!qp->tx_mw)
1205 qp->tx_mw_phys = mw_base + qp_offset;
1206 if (!qp->tx_mw_phys)
1210 qp->rx_info = qp->tx_mw + tx_size;
1213 qp->tx_max_frame = min(transport_mtu, tx_size / 2);
1214 qp->tx_max_entry = tx_size / qp->tx_max_frame;
1219 snprintf(debugfs_name, 4, "qp%d", qp_num);
1220 qp->debugfs_dir = debugfs_create_dir(debugfs_name,
1223 qp->debugfs_stats = debugfs_create_file("stats", S_IRUSR,
1224 qp->debugfs_dir, qp,
1227 qp->debugfs_dir = NULL;
1228 qp->debugfs_stats = NULL;
1231 INIT_DELAYED_WORK(&qp->link_work, ntb_qp_link_work);
1232 INIT_WORK(&qp->link_cleanup, ntb_qp_link_cleanup_work);
1234 spin_lock_init(&qp->ntb_rx_q_lock);
1235 spin_lock_init(&qp->ntb_tx_free_q_lock);
1237 INIT_LIST_HEAD(&qp->rx_post_q);
1238 INIT_LIST_HEAD(&qp->rx_pend_q);
1239 INIT_LIST_HEAD(&qp->rx_free_q);
1240 INIT_LIST_HEAD(&qp->tx_free_q);
1242 tasklet_init(&qp->rxc_db_work, ntb_transport_rxc_db,
1243 (unsigned long)qp);
1411 struct ntb_transport_qp *qp;
1421 /* verify that all the qp's are freed */
1423 qp = &nt->qp_vec[i];
1425 ntb_transport_free_queue(qp);
1426 debugfs_remove_recursive(qp->debugfs_dir);
1444 static void ntb_complete_rxc(struct ntb_transport_qp *qp)
1451 spin_lock_irqsave(&qp->ntb_rx_q_lock, irqflags);
1453 while (!list_empty(&qp->rx_post_q)) {
1454 entry = list_first_entry(&qp->rx_post_q,
1460 iowrite32(entry->rx_index, &qp->rx_info->entry);
1465 list_move_tail(&entry->entry, &qp->rx_free_q);
1467 spin_unlock_irqrestore(&qp->ntb_rx_q_lock, irqflags);
1469 if (qp->rx_handler && qp->client_ready)
1470 qp->rx_handler(qp, qp->cb_data, cb_data, len);
1472 spin_lock_irqsave(&qp->ntb_rx_q_lock, irqflags);
1475 spin_unlock_irqrestore(&qp->ntb_rx_q_lock, irqflags);
1494 struct ntb_transport_qp *qp = entry->qp;
1495 void *offset = qp->rx_buff + qp->rx_max_frame *
1496 qp->rx_index;
1499 qp->rx_memcpy++;
1511 ntb_complete_rxc(entry->qp);
1530 struct ntb_transport_qp *qp = entry->qp;
1531 struct dma_chan *chan = qp->rx_dma_chan;
1581 qp->last_cookie = cookie;
1583 qp->rx_async++;
1597 struct ntb_transport_qp *qp = entry->qp;
1598 struct dma_chan *chan = qp->rx_dma_chan;
1612 qp->rx_async++;
1618 qp->rx_memcpy++;
1621 static int ntb_process_rxc(struct ntb_transport_qp *qp)
1627 offset = qp->rx_buff + qp->rx_max_frame * qp->rx_index;
1628 hdr = offset + qp->rx_max_frame - sizeof(struct ntb_payload_header);
1630 dev_dbg(&qp->ndev->pdev->dev, "qp %d: RX ver %u len %d flags %x\n",
1631 qp->qp_num, hdr->ver, hdr->len, hdr->flags);
1634 dev_dbg(&qp->ndev->pdev->dev, "done flag not set\n");
1635 qp->rx_ring_empty++;
1640 dev_dbg(&qp->ndev->pdev->dev, "link down flag set\n");
1641 ntb_qp_link_down(qp);
1646 if (hdr->ver != (u32)qp->rx_pkts) {
1647 dev_dbg(&qp->ndev->pdev->dev,
1649 qp->rx_pkts, hdr->ver);
1650 qp->rx_err_ver++;
1654 entry = ntb_list_mv(&qp->ntb_rx_q_lock, &qp->rx_pend_q, &qp->rx_post_q);
1656 dev_dbg(&qp->ndev->pdev->dev, "no receive buffer\n");
1657 qp->rx_err_no_buf++;
1662 entry->rx_index = qp->rx_index;
1665 dev_dbg(&qp->ndev->pdev->dev,
1668 qp->rx_err_oflow++;
1673 ntb_complete_rxc(qp);
1675 dev_dbg(&qp->ndev->pdev->dev,
1677 qp->rx_index, hdr->ver, hdr->len, entry->len);
1679 qp->rx_bytes += hdr->len;
1680 qp->rx_pkts++;
1687 qp->rx_index++;
1688 qp->rx_index %= qp->rx_max_entry;
1695 struct ntb_transport_qp *qp = (void *)data;
1698 dev_dbg(&qp->ndev->pdev->dev, "%s: doorbell %d received\n",
1699 __func__, qp->qp_num);
1704 for (i = 0; i < qp->rx_max_entry; i++) {
1705 rc = ntb_process_rxc(qp);
1710 if (i && qp->rx_dma_chan)
1711 dma_async_issue_pending(qp->rx_dma_chan);
1713 if (i == qp->rx_max_entry) {
1715 if (qp->active)
1716 tasklet_schedule(&qp->rxc_db_work);
1717 } else if (ntb_db_read(qp->ndev) & BIT_ULL(qp->qp_num)) {
1719 ntb_db_clear(qp->ndev, BIT_ULL(qp->qp_num));
1721 ntb_db_read(qp->ndev);
1727 if (qp->active)
1728 tasklet_schedule(&qp->rxc_db_work);
1736 struct ntb_transport_qp *qp = entry->qp;
1751 qp->tx_mw + qp->tx_max_frame *
1756 qp->tx_memcpy++;
1768 if (qp->use_msi)
1769 ntb_msi_peer_trigger(qp->ndev, PIDX, &qp->peer_msi_desc);
1771 ntb_peer_db_set(qp->ndev, BIT_ULL(qp->qp_num));
1778 qp->tx_bytes += entry->len;
1780 if (qp->tx_handler)
1781 qp->tx_handler(qp, qp->cb_data, entry->cb_data,
1785 ntb_list_add(&qp->ntb_tx_free_q_lock, &entry->entry, &qp->tx_free_q);
1806 static int ntb_async_tx_submit(struct ntb_transport_qp *qp,
1810 struct dma_chan *chan = qp->tx_dma_chan;
1820 dest = qp->tx_mw_dma_addr + qp->tx_max_frame * entry->tx_index;
1865 static void ntb_async_tx(struct ntb_transport_qp *qp,
1869 struct dma_chan *chan = qp->tx_dma_chan;
1873 entry->tx_index = qp->tx_index;
1874 offset = qp->tx_mw + qp->tx_max_frame * entry->tx_index;
1875 hdr = offset + qp->tx_max_frame - sizeof(struct ntb_payload_header);
1879 iowrite32((u32)qp->tx_pkts, &hdr->ver);
1887 res = ntb_async_tx_submit(qp, entry);
1892 qp->tx_async++;
1898 qp->tx_memcpy++;
1901 static int ntb_process_tx(struct ntb_transport_qp *qp,
1904 if (!ntb_transport_tx_free_entry(qp)) {
1905 qp->tx_ring_full++;
1909 if (entry->len > qp->tx_max_frame - sizeof(struct ntb_payload_header)) {
1910 if (qp->tx_handler)
1911 qp->tx_handler(qp, qp->cb_data, NULL, -EIO);
1913 ntb_list_add(&qp->ntb_tx_free_q_lock, &entry->entry,
1914 &qp->tx_free_q);
1918 ntb_async_tx(qp, entry);
1920 qp->tx_index++;
1921 qp->tx_index %= qp->tx_max_entry;
1923 qp->tx_pkts++;
1928 static void ntb_send_link_down(struct ntb_transport_qp *qp)
1930 struct pci_dev *pdev = qp->ndev->pdev;
1934 if (!qp->link_is_up)
1937 dev_info(&pdev->dev, "qp %d: Send Link Down\n", qp->qp_num);
1940 entry = ntb_list_rm(&qp->ntb_tx_free_q_lock, &qp->tx_free_q);
1954 rc = ntb_process_tx(qp, entry);
1957 qp->qp_num);
1959 ntb_qp_link_down_reset(qp);
1989 struct ntb_transport_qp *qp;
2009 qp = &nt->qp_vec[free_queue];
2010 qp_bit = BIT_ULL(qp->qp_num);
2014 qp->cb_data = data;
2015 qp->rx_handler = handlers->rx_handler;
2016 qp->tx_handler = handlers->tx_handler;
2017 qp->event_handler = handlers->event_handler;
2023 qp->tx_dma_chan =
2026 if (!qp->tx_dma_chan)
2029 qp->rx_dma_chan =
2032 if (!qp->rx_dma_chan)
2035 qp->tx_dma_chan = NULL;
2036 qp->rx_dma_chan = NULL;
2039 qp->tx_mw_dma_addr = 0;
2040 if (qp->tx_dma_chan) {
2041 qp->tx_mw_dma_addr =
2042 dma_map_resource(qp->tx_dma_chan->device->dev,
2043 qp->tx_mw_phys, qp->tx_mw_size,
2045 if (dma_mapping_error(qp->tx_dma_chan->device->dev,
2046 qp->tx_mw_dma_addr)) {
2047 qp->tx_mw_dma_addr = 0;
2053 qp->tx_dma_chan ? "DMA" : "CPU");
2056 qp->rx_dma_chan ? "DMA" : "CPU");
2063 entry->qp = qp;
2064 ntb_list_add(&qp->ntb_rx_q_lock, &entry->entry,
2065 &qp->rx_free_q);
2067 qp->rx_alloc_entry = NTB_QP_DEF_NUM_ENTRIES;
2069 for (i = 0; i < qp->tx_max_entry; i++) {
2074 entry->qp = qp;
2075 ntb_list_add(&qp->ntb_tx_free_q_lock, &entry->entry,
2076 &qp->tx_free_q);
2079 ntb_db_clear(qp->ndev, qp_bit);
2080 ntb_db_clear_mask(qp->ndev, qp_bit);
2082 dev_info(&pdev->dev, "NTB Transport QP %d created\n", qp->qp_num);
2084 return qp;
2087 while ((entry = ntb_list_rm(&qp->ntb_tx_free_q_lock, &qp->tx_free_q)))
2090 qp->rx_alloc_entry = 0;
2091 while ((entry = ntb_list_rm(&qp->ntb_rx_q_lock, &qp->rx_free_q)))
2093 if (qp->tx_mw_dma_addr)
2094 dma_unmap_resource(qp->tx_dma_chan->device->dev,
2095 qp->tx_mw_dma_addr, qp->tx_mw_size,
2097 if (qp->tx_dma_chan)
2098 dma_release_channel(qp->tx_dma_chan);
2099 if (qp->rx_dma_chan)
2100 dma_release_channel(qp->rx_dma_chan);
2109 * @qp: NTB queue to be freed
2113 void ntb_transport_free_queue(struct ntb_transport_qp *qp)
2119 if (!qp)
2122 pdev = qp->ndev->pdev;
2124 qp->active = false;
2126 if (qp->tx_dma_chan) {
2127 struct dma_chan *chan = qp->tx_dma_chan;
2131 qp->tx_dma_chan = NULL;
2136 dma_sync_wait(chan, qp->last_cookie);
2140 qp->tx_mw_dma_addr, qp->tx_mw_size,
2146 if (qp->rx_dma_chan) {
2147 struct dma_chan *chan = qp->rx_dma_chan;
2151 qp->rx_dma_chan = NULL;
2156 dma_sync_wait(chan, qp->last_cookie);
2161 qp_bit = BIT_ULL(qp->qp_num);
2163 ntb_db_set_mask(qp->ndev, qp_bit);
2164 tasklet_kill(&qp->rxc_db_work);
2166 cancel_delayed_work_sync(&qp->link_work);
2168 qp->cb_data = NULL;
2169 qp->rx_handler = NULL;
2170 qp->tx_handler = NULL;
2171 qp->event_handler = NULL;
2173 while ((entry = ntb_list_rm(&qp->ntb_rx_q_lock, &qp->rx_free_q)))
2176 while ((entry = ntb_list_rm(&qp->ntb_rx_q_lock, &qp->rx_pend_q))) {
2181 while ((entry = ntb_list_rm(&qp->ntb_rx_q_lock, &qp->rx_post_q))) {
2186 while ((entry = ntb_list_rm(&qp->ntb_tx_free_q_lock, &qp->tx_free_q)))
2189 qp->transport->qp_bitmap_free |= qp_bit;
2191 dev_info(&pdev->dev, "NTB Transport QP %d freed\n", qp->qp_num);
2197 * @qp: NTB queue to be freed
2201 * shutdown of qp.
2205 void *ntb_transport_rx_remove(struct ntb_transport_qp *qp, unsigned int *len)
2210 if (!qp || qp->client_ready)
2213 entry = ntb_list_rm(&qp->ntb_rx_q_lock, &qp->rx_pend_q);
2220 ntb_list_add(&qp->ntb_rx_q_lock, &entry->entry, &qp->rx_free_q);
2228 * @qp: NTB transport layer queue the entry is to be enqueued on
2238 int ntb_transport_rx_enqueue(struct ntb_transport_qp *qp, void *cb, void *data,
2243 if (!qp)
2246 entry = ntb_list_rm(&qp->ntb_rx_q_lock, &qp->rx_free_q);
2258 ntb_list_add(&qp->ntb_rx_q_lock, &entry->entry, &qp->rx_pend_q);
2260 if (qp->active)
2261 tasklet_schedule(&qp->rxc_db_work);
2269 * @qp: NTB transport layer queue the entry is to be enqueued on
2276 * serialize access to the qp.
2280 int ntb_transport_tx_enqueue(struct ntb_transport_qp *qp, void *cb, void *data,
2286 if (!qp || !len)
2289 /* If the qp link is down already, just ignore. */
2290 if (!qp->link_is_up)
2293 entry = ntb_list_rm(&qp->ntb_tx_free_q_lock, &qp->tx_free_q);
2295 qp->tx_err_no_buf++;
2307 rc = ntb_process_tx(qp, entry);
2309 ntb_list_add(&qp->ntb_tx_free_q_lock, &entry->entry,
2310 &qp->tx_free_q);
2318 * @qp: NTB transport layer queue to be enabled
2322 void ntb_transport_link_up(struct ntb_transport_qp *qp)
2324 if (!qp)
2327 qp->client_ready = true;
2329 if (qp->transport->link_is_up)
2330 schedule_delayed_work(&qp->link_work, 0);
2336 * @qp: NTB transport layer queue to be disabled
2342 void ntb_transport_link_down(struct ntb_transport_qp *qp)
2346 if (!qp)
2349 qp->client_ready = false;
2351 val = ntb_spad_read(qp->ndev, QP_LINKS);
2353 ntb_peer_spad_write(qp->ndev, PIDX, QP_LINKS, val & ~BIT(qp->qp_num));
2355 if (qp->link_is_up)
2356 ntb_send_link_down(qp);
2358 cancel_delayed_work_sync(&qp->link_work);
2364 * @qp: NTB transport layer queue to be queried
2370 bool ntb_transport_link_query(struct ntb_transport_qp *qp)
2372 if (!qp)
2375 return qp->link_is_up;
2380 * ntb_transport_qp_num - Query the qp number
2381 * @qp: NTB transport layer queue to be queried
2383 * Query qp number of the NTB transport queue
2385 * RETURNS: a zero based number specifying the qp number
2387 unsigned char ntb_transport_qp_num(struct ntb_transport_qp *qp)
2389 if (!qp)
2392 return qp->qp_num;
2397 * ntb_transport_max_size - Query the max payload size of a qp
2398 * @qp: NTB transport layer queue to be queried
2400 * Query the maximum payload size permissible on the given qp
2402 * RETURNS: the max payload size of a qp
2404 unsigned int ntb_transport_max_size(struct ntb_transport_qp *qp)
2410 if (!qp)
2413 rx_chan = qp->rx_dma_chan;
2414 tx_chan = qp->tx_dma_chan;
2420 max_size = qp->tx_max_frame - sizeof(struct ntb_payload_header);
2427 unsigned int ntb_transport_tx_free_entry(struct ntb_transport_qp *qp)
2429 unsigned int head = qp->tx_index;
2430 unsigned int tail = qp->remote_rx_info->entry;
2432 return tail >= head ? tail - head : qp->tx_max_entry + tail - head;
2439 struct ntb_transport_qp *qp;
2453 qp = &nt->qp_vec[qp_num];
2455 if (qp->active)
2456 tasklet_schedule(&qp->rxc_db_work);