@@ -451,9 +451,11 @@ void xhci_debugfs_create_endpoint(struct xhci_hcd *xhci,
if (!epriv)
return;
+ epriv->show_ring = dev->eps[ep_index].ring;
+
snprintf(epriv->name, sizeof(epriv->name), "ep%02d", ep_index);
epriv->root = xhci_debugfs_create_ring_dir(xhci,
- &dev->eps[ep_index].ring,
+ &epriv->show_ring,
epriv->name,
spriv->root);
spriv->eps[ep_index] = epriv;
@@ -475,6 +477,111 @@ void xhci_debugfs_remove_endpoint(struct xhci_hcd *xhci,
kfree(epriv);
}
+static int xhci_stream_id_show(struct seq_file *s, void *unused)
+{
+ struct xhci_ep_priv *epriv = s->private;
+
+ if (!epriv->stream_info)
+ return -EPERM;
+
+ seq_printf(s, "Show stream ID %d trb ring, supported [1 - %d]\n",
+ epriv->stream_id, epriv->stream_info->num_streams - 1);
+
+ return 0;
+}
+
+static int xhci_stream_id_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, xhci_stream_id_show, inode->i_private);
+}
+
+static ssize_t xhci_stream_id_write(struct file *file, const char __user *ubuf,
+ size_t count, loff_t *ppos)
+{
+ struct seq_file *s = file->private_data;
+ struct xhci_ep_priv *epriv = s->private;
+ int ret;
+ u16 stream_id; /* MaxPStreams + 1 <= 16 */
+
+ if (!epriv->stream_info)
+ return -EPERM;
+
+ /* Decimal number */
+ ret = kstrtou16_from_user(ubuf, count, 10, &stream_id);
+ if (ret)
+ return ret;
+
+ if (stream_id == 0 || stream_id >= epriv->stream_info->num_streams)
+ return -EINVAL;
+
+ epriv->stream_id = stream_id;
+ epriv->show_ring = epriv->stream_info->stream_rings[stream_id];
+
+ return count;
+}
+
+static const struct file_operations stream_id_fops = {
+ .open = xhci_stream_id_open,
+ .write = xhci_stream_id_write,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int xhci_stream_context_array_show(struct seq_file *s, void *unused)
+{
+ struct xhci_ep_priv *epriv = s->private;
+ struct xhci_stream_ctx *stream_ctx;
+ dma_addr_t dma;
+ int id;
+
+ if (!epriv->stream_info)
+ return -EPERM;
+
+ seq_printf(s, "Allocated %d streams and %d stream context array entries\n",
+ epriv->stream_info->num_streams,
+ epriv->stream_info->num_stream_ctxs);
+
+ for (id = 0; id < epriv->stream_info->num_stream_ctxs; id++) {
+ stream_ctx = epriv->stream_info->stream_ctx_array + id;
+ dma = epriv->stream_info->ctx_array_dma + id * 16;
+ if (id < epriv->stream_info->num_streams)
+ seq_printf(s, "%pad stream id %d deq %016llx\n", &dma,
+ id, le64_to_cpu(stream_ctx->stream_ring));
+ else
+ seq_printf(s, "%pad stream context entry not used deq %016llx\n",
+ &dma, le64_to_cpu(stream_ctx->stream_ring));
+ }
+
+ return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(xhci_stream_context_array);
+
+void xhci_debugfs_create_stream_files(struct xhci_hcd *xhci,
+ struct xhci_virt_device *dev,
+ int ep_index)
+{
+ struct xhci_slot_priv *spriv = dev->debugfs_private;
+ struct xhci_ep_priv *epriv;
+
+ if (!spriv || !spriv->eps[ep_index] ||
+ !dev->eps[ep_index].stream_info)
+ return;
+
+ epriv = spriv->eps[ep_index];
+ epriv->stream_info = dev->eps[ep_index].stream_info;
+
+ /* Show trb ring of stream ID 1 by default */
+ epriv->stream_id = 1;
+ epriv->show_ring = epriv->stream_info->stream_rings[1];
+ debugfs_create_file("stream_id", 0644,
+ epriv->root, epriv,
+ &stream_id_fops);
+ debugfs_create_file("stream_context_array", 0444,
+ epriv->root, epriv,
+ &xhci_stream_context_array_fops);
+}
+
void xhci_debugfs_create_slot(struct xhci_hcd *xhci, int slot_id)
{
struct xhci_slot_priv *priv;
@@ -91,6 +91,9 @@ struct xhci_file_map {
struct xhci_ep_priv {
char name[DEBUGFS_NAMELEN];
struct dentry *root;
+ struct xhci_stream_info *stream_info;
+ struct xhci_ring *show_ring;
+ unsigned int stream_id;
};
struct xhci_slot_priv {
@@ -113,6 +116,9 @@ void xhci_debugfs_create_endpoint(struct xhci_hcd *xhci,
void xhci_debugfs_remove_endpoint(struct xhci_hcd *xhci,
struct xhci_virt_device *virt_dev,
int ep_index);
+void xhci_debugfs_create_stream_files(struct xhci_hcd *xhci,
+ struct xhci_virt_device *virt_dev,
+ int ep_index);
#else
static inline void xhci_debugfs_init(struct xhci_hcd *xhci) { }
static inline void xhci_debugfs_exit(struct xhci_hcd *xhci) { }
@@ -128,6 +134,10 @@ static inline void
xhci_debugfs_remove_endpoint(struct xhci_hcd *xhci,
struct xhci_virt_device *virt_dev,
int ep_index) { }
+static inline void
+xhci_debugfs_create_stream_files(struct xhci_hcd *xhci,
+ struct xhci_virt_device *virt_dev,
+ int ep_index) { }
#endif /* CONFIG_DEBUG_FS */
#endif /* __LINUX_XHCI_DEBUGFS_H */
@@ -3533,6 +3533,7 @@ static int xhci_alloc_streams(struct usb_hcd *hcd, struct usb_device *udev,
xhci_dbg(xhci, "Slot %u ep ctx %u now has streams.\n",
udev->slot_id, ep_index);
vdev->eps[ep_index].ep_state |= EP_HAS_STREAMS;
+ xhci_debugfs_create_stream_files(xhci, vdev, ep_index);
}
xhci_free_command(xhci, config_cmd);
spin_unlock_irqrestore(&xhci->lock, flags);