diff options
Diffstat (limited to 'drivers/ntb/ntb_transport.c')
| -rw-r--r-- | drivers/ntb/ntb_transport.c | 38 |
1 files changed, 34 insertions, 4 deletions
diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c index 2ef9d9130864..d5c5894f252e 100644 --- a/drivers/ntb/ntb_transport.c +++ b/drivers/ntb/ntb_transport.c @@ -153,6 +153,7 @@ struct ntb_transport_qp { unsigned int rx_index; unsigned int rx_max_entry; unsigned int rx_max_frame; + unsigned int rx_alloc_entry; dma_cookie_t last_cookie; struct tasklet_struct rxc_db_work; @@ -480,7 +481,9 @@ static ssize_t debugfs_read(struct file *filp, char __user *ubuf, size_t count, out_offset += snprintf(buf + out_offset, out_count - out_offset, "rx_index - \t%u\n", qp->rx_index); out_offset += snprintf(buf + out_offset, out_count - out_offset, - "rx_max_entry - \t%u\n\n", qp->rx_max_entry); + "rx_max_entry - \t%u\n", qp->rx_max_entry); + out_offset += snprintf(buf + out_offset, out_count - out_offset, + "rx_alloc_entry - \t%u\n\n", qp->rx_alloc_entry); out_offset += snprintf(buf + out_offset, out_count - out_offset, "tx_bytes - \t%llu\n", qp->tx_bytes); @@ -597,9 +600,12 @@ static int ntb_transport_setup_qp_mw(struct ntb_transport_ctx *nt, { struct ntb_transport_qp *qp = &nt->qp_vec[qp_num]; struct ntb_transport_mw *mw; + struct ntb_dev *ndev = nt->ndev; + struct ntb_queue_entry *entry; unsigned int rx_size, num_qps_mw; unsigned int mw_num, mw_count, qp_count; unsigned int i; + int node; mw_count = nt->mw_count; qp_count = nt->qp_count; @@ -626,6 +632,23 @@ static int ntb_transport_setup_qp_mw(struct ntb_transport_ctx *nt, qp->rx_max_entry = rx_size / qp->rx_max_frame; qp->rx_index = 0; + /* + * Checking to see if we have more entries than the default. + * We should add additional entries if that is the case so we + * can be in sync with the transport frames. + */ + node = dev_to_node(&ndev->dev); + for (i = qp->rx_alloc_entry; i < qp->rx_max_entry; i++) { + entry = kzalloc_node(sizeof(*entry), GFP_ATOMIC, node); + if (!entry) + return -ENOMEM; + + entry->qp = qp; + ntb_list_add(&qp->ntb_rx_q_lock, &entry->entry, + &qp->rx_free_q); + qp->rx_alloc_entry++; + } + qp->remote_rx_info->entry = qp->rx_max_entry - 1; /* setup the hdr offsets with 0's */ @@ -1037,6 +1060,13 @@ static int ntb_transport_probe(struct ntb_client *self, struct ntb_dev *ndev) int node; int rc, i; + mw_count = ntb_mw_count(ndev); + if (ntb_spad_count(ndev) < (NUM_MWS + 1 + mw_count * 2)) { + dev_err(&ndev->dev, "Not enough scratch pad registers for %s", + NTB_TRANSPORT_NAME); + return -EIO; + } + if (ntb_db_is_unsafe(ndev)) dev_dbg(&ndev->dev, "doorbell is unsafe, proceed anyway...\n"); @@ -1052,8 +1082,6 @@ static int ntb_transport_probe(struct ntb_client *self, struct ntb_dev *ndev) nt->ndev = ndev; - mw_count = ntb_mw_count(ndev); - nt->mw_count = mw_count; nt->mw_vec = kzalloc_node(mw_count * sizeof(*nt->mw_vec), @@ -1722,8 +1750,9 @@ ntb_transport_create_queue(void *data, struct device *client_dev, ntb_list_add(&qp->ntb_rx_q_lock, &entry->entry, &qp->rx_free_q); } + qp->rx_alloc_entry = NTB_QP_DEF_NUM_ENTRIES; - for (i = 0; i < NTB_QP_DEF_NUM_ENTRIES; i++) { + for (i = 0; i < qp->tx_max_entry; i++) { entry = kzalloc_node(sizeof(*entry), GFP_ATOMIC, node); if (!entry) goto err2; @@ -1744,6 +1773,7 @@ err2: while ((entry = ntb_list_rm(&qp->ntb_tx_free_q_lock, &qp->tx_free_q))) kfree(entry); err1: + qp->rx_alloc_entry = 0; while ((entry = ntb_list_rm(&qp->ntb_rx_q_lock, &qp->rx_free_q))) kfree(entry); if (qp->tx_dma_chan) |