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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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usb: dwc3: debugfs: dump out endpoint details
There's a bunch of information in the debug register set from dwc3 which is useful in some debugging scenarios. Let's dump them out in endpoint-specific directories and designated files. Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Felipe Balbi
parent
b058f3e8a3
commit
818ec3aba8
@ -618,6 +618,306 @@ static const struct file_operations dwc3_link_state_fops = {
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.release = single_release,
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};
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struct dwc3_ep_file_map {
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char name[25];
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int (*show)(struct seq_file *s, void *unused);
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};
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static int dwc3_tx_fifo_queue_show(struct seq_file *s, void *unused)
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{
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struct dwc3_ep *dep = s->private;
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struct dwc3 *dwc = dep->dwc;
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unsigned long flags;
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u32 val;
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spin_lock_irqsave(&dwc->lock, flags);
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val = dwc3_core_fifo_space(dep, DWC3_TXFIFOQ);
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seq_printf(s, "%u\n", val);
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spin_unlock_irqrestore(&dwc->lock, flags);
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return 0;
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}
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static int dwc3_rx_fifo_queue_show(struct seq_file *s, void *unused)
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{
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struct dwc3_ep *dep = s->private;
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struct dwc3 *dwc = dep->dwc;
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unsigned long flags;
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u32 val;
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spin_lock_irqsave(&dwc->lock, flags);
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val = dwc3_core_fifo_space(dep, DWC3_RXFIFOQ);
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seq_printf(s, "%u\n", val);
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spin_unlock_irqrestore(&dwc->lock, flags);
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return 0;
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}
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static int dwc3_tx_request_queue_show(struct seq_file *s, void *unused)
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{
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struct dwc3_ep *dep = s->private;
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struct dwc3 *dwc = dep->dwc;
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unsigned long flags;
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u32 val;
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spin_lock_irqsave(&dwc->lock, flags);
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val = dwc3_core_fifo_space(dep, DWC3_TXREQQ);
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seq_printf(s, "%u\n", val);
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spin_unlock_irqrestore(&dwc->lock, flags);
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return 0;
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}
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static int dwc3_rx_request_queue_show(struct seq_file *s, void *unused)
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{
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struct dwc3_ep *dep = s->private;
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struct dwc3 *dwc = dep->dwc;
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unsigned long flags;
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u32 val;
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spin_lock_irqsave(&dwc->lock, flags);
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val = dwc3_core_fifo_space(dep, DWC3_RXREQQ);
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seq_printf(s, "%u\n", val);
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spin_unlock_irqrestore(&dwc->lock, flags);
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return 0;
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}
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static int dwc3_rx_info_queue_show(struct seq_file *s, void *unused)
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{
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struct dwc3_ep *dep = s->private;
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struct dwc3 *dwc = dep->dwc;
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unsigned long flags;
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u32 val;
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spin_lock_irqsave(&dwc->lock, flags);
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val = dwc3_core_fifo_space(dep, DWC3_RXINFOQ);
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seq_printf(s, "%u\n", val);
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spin_unlock_irqrestore(&dwc->lock, flags);
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return 0;
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}
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static int dwc3_descriptor_fetch_queue_show(struct seq_file *s, void *unused)
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{
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struct dwc3_ep *dep = s->private;
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struct dwc3 *dwc = dep->dwc;
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unsigned long flags;
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u32 val;
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spin_lock_irqsave(&dwc->lock, flags);
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val = dwc3_core_fifo_space(dep, DWC3_DESCFETCHQ);
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seq_printf(s, "%u\n", val);
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spin_unlock_irqrestore(&dwc->lock, flags);
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return 0;
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}
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static int dwc3_event_queue_show(struct seq_file *s, void *unused)
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{
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struct dwc3_ep *dep = s->private;
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struct dwc3 *dwc = dep->dwc;
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unsigned long flags;
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u32 val;
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spin_lock_irqsave(&dwc->lock, flags);
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val = dwc3_core_fifo_space(dep, DWC3_EVENTQ);
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seq_printf(s, "%u\n", val);
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spin_unlock_irqrestore(&dwc->lock, flags);
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return 0;
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}
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static int dwc3_ep_transfer_type_show(struct seq_file *s, void *unused)
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{
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struct dwc3_ep *dep = s->private;
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struct dwc3 *dwc = dep->dwc;
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unsigned long flags;
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spin_lock_irqsave(&dwc->lock, flags);
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if (!(dep->flags & DWC3_EP_ENABLED) ||
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!dep->endpoint.desc) {
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seq_printf(s, "--\n");
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goto out;
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}
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switch (usb_endpoint_type(dep->endpoint.desc)) {
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case USB_ENDPOINT_XFER_CONTROL:
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seq_printf(s, "control\n");
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break;
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case USB_ENDPOINT_XFER_ISOC:
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seq_printf(s, "isochronous\n");
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break;
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case USB_ENDPOINT_XFER_BULK:
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seq_printf(s, "bulk\n");
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break;
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case USB_ENDPOINT_XFER_INT:
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seq_printf(s, "interrupt\n");
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break;
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default:
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seq_printf(s, "--\n");
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}
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out:
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spin_unlock_irqrestore(&dwc->lock, flags);
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return 0;
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}
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static inline const char *dwc3_trb_type_string(struct dwc3_trb *trb)
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{
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switch (DWC3_TRBCTL_TYPE(trb->ctrl)) {
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case DWC3_TRBCTL_NORMAL:
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return "normal";
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case DWC3_TRBCTL_CONTROL_SETUP:
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return "control-setup";
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case DWC3_TRBCTL_CONTROL_STATUS2:
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return "control-status2";
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case DWC3_TRBCTL_CONTROL_STATUS3:
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return "control-status3";
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case DWC3_TRBCTL_CONTROL_DATA:
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return "control-data";
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case DWC3_TRBCTL_ISOCHRONOUS_FIRST:
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return "isoc-first";
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case DWC3_TRBCTL_ISOCHRONOUS:
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return "isoc";
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case DWC3_TRBCTL_LINK_TRB:
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return "link";
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default:
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return "UNKNOWN";
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}
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}
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static int dwc3_ep_trb_ring_show(struct seq_file *s, void *unused)
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{
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struct dwc3_ep *dep = s->private;
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struct dwc3 *dwc = dep->dwc;
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unsigned long flags;
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int i;
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spin_lock_irqsave(&dwc->lock, flags);
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if (dep->number <= 1) {
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seq_printf(s, "--\n");
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goto out;
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}
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seq_printf(s, "enqueue pointer %d\n", dep->trb_enqueue);
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seq_printf(s, "dequeue pointer %d\n", dep->trb_dequeue);
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seq_printf(s, "\n--------------------------------------------------\n\n");
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seq_printf(s, "buffer_addr,size,type,ioc,isp_imi,csp,chn,lst,hwo\n");
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for (i = 0; i < DWC3_TRB_NUM; i++) {
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struct dwc3_trb *trb = &dep->trb_pool[i];
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seq_printf(s, "%08x%08x,%d,%s,%d,%d,%d,%d,%d,%d\n",
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trb->bph, trb->bpl, trb->size,
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dwc3_trb_type_string(trb),
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!!(trb->ctrl & DWC3_TRB_CTRL_IOC),
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!!(trb->ctrl & DWC3_TRB_CTRL_ISP_IMI),
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!!(trb->ctrl & DWC3_TRB_CTRL_CSP),
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!!(trb->ctrl & DWC3_TRB_CTRL_CHN),
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!!(trb->ctrl & DWC3_TRB_CTRL_LST),
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!!(trb->ctrl & DWC3_TRB_CTRL_HWO));
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}
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out:
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spin_unlock_irqrestore(&dwc->lock, flags);
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return 0;
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}
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static struct dwc3_ep_file_map map[] = {
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{ "tx_fifo_queue", dwc3_tx_fifo_queue_show, },
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{ "rx_fifo_queue", dwc3_rx_fifo_queue_show, },
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{ "tx_request_queue", dwc3_tx_request_queue_show, },
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{ "rx_request_queue", dwc3_rx_request_queue_show, },
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{ "rx_info_queue", dwc3_rx_info_queue_show, },
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{ "descriptor_fetch_queue", dwc3_descriptor_fetch_queue_show, },
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{ "event_queue", dwc3_event_queue_show, },
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{ "transfer_type", dwc3_ep_transfer_type_show, },
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{ "trb_ring", dwc3_ep_trb_ring_show, },
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};
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static int dwc3_endpoint_open(struct inode *inode, struct file *file)
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{
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const char *file_name = file_dentry(file)->d_iname;
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struct dwc3_ep_file_map *f_map;
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int i;
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for (i = 0; i < ARRAY_SIZE(map); i++) {
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f_map = &map[i];
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if (strcmp(f_map->name, file_name) == 0)
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break;
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}
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return single_open(file, f_map->show, inode->i_private);
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}
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static const struct file_operations dwc3_endpoint_fops = {
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.open = dwc3_endpoint_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static void dwc3_debugfs_create_endpoint_file(struct dwc3_ep *dep,
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struct dentry *parent, int type)
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{
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struct dentry *file;
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struct dwc3_ep_file_map *ep_file = &map[type];
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file = debugfs_create_file(ep_file->name, S_IRUGO, parent, dep,
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&dwc3_endpoint_fops);
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}
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static void dwc3_debugfs_create_endpoint_files(struct dwc3_ep *dep,
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struct dentry *parent)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(map); i++)
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dwc3_debugfs_create_endpoint_file(dep, parent, i);
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}
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static void dwc3_debugfs_create_endpoint_dir(struct dwc3_ep *dep,
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struct dentry *parent)
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{
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struct dentry *dir;
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dir = debugfs_create_dir(dep->name, parent);
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if (IS_ERR_OR_NULL(dir))
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return;
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dwc3_debugfs_create_endpoint_files(dep, dir);
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}
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static void dwc3_debugfs_create_endpoint_dirs(struct dwc3 *dwc,
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struct dentry *parent)
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{
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int i;
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for (i = 0; i < dwc->num_in_eps; i++) {
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u8 epnum = (i << 1) | 1;
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struct dwc3_ep *dep = dwc->eps[epnum];
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if (!dep)
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continue;
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dwc3_debugfs_create_endpoint_dir(dep, parent);
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}
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for (i = 0; i < dwc->num_out_eps; i++) {
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u8 epnum = (i << 1);
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struct dwc3_ep *dep = dwc->eps[epnum];
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if (!dep)
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continue;
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dwc3_debugfs_create_endpoint_dir(dep, parent);
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}
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}
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void dwc3_debugfs_init(struct dwc3 *dwc)
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{
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struct dentry *root;
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@ -663,6 +963,8 @@ void dwc3_debugfs_init(struct dwc3 *dwc)
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root, dwc, &dwc3_link_state_fops);
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if (!file)
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dev_dbg(dwc->dev, "Can't create debugfs link_state\n");
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dwc3_debugfs_create_endpoint_dirs(dwc, root);
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}
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}
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