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path: root/drivers/ntb
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Diffstat (limited to 'drivers/ntb')
-rw-r--r--drivers/ntb/ntb_transport.c29
1 files changed, 27 insertions, 2 deletions
diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c
index 2ef9d9130864..6db8c8528f26 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 */
@@ -1722,8 +1745,9 @@ 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 +1768,7 @@ 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)