596 lines
15 KiB
C
596 lines
15 KiB
C
/*
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* UHCI-specific debugging code. Invaluable when something
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* goes wrong, but don't get in my face.
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*
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* Kernel visible pointers are surrounded in []s and bus
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* visible pointers are surrounded in ()s
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*
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* (C) Copyright 1999 Linus Torvalds
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* (C) Copyright 1999-2001 Johannes Erdfelt
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*/
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#include <linux/slab.h>
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#include <linux/kernel.h>
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#include <linux/debugfs.h>
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#include <linux/smp_lock.h>
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#include <asm/io.h>
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#include "uhci-hcd.h"
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#define uhci_debug_operations (* (const struct file_operations *) NULL)
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static struct dentry *uhci_debugfs_root;
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#ifdef DEBUG
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/* Handle REALLY large printks so we don't overflow buffers */
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static void lprintk(char *buf)
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{
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char *p;
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/* Just write one line at a time */
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while (buf) {
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p = strchr(buf, '\n');
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if (p)
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*p = 0;
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printk(KERN_DEBUG "%s\n", buf);
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buf = p;
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if (buf)
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buf++;
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}
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}
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static int uhci_show_td(struct uhci_td *td, char *buf, int len, int space)
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{
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char *out = buf;
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char *spid;
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u32 status, token;
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/* Try to make sure there's enough memory */
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if (len < 160)
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return 0;
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status = td_status(td);
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out += sprintf(out, "%*s[%p] link (%08x) ", space, "", td, le32_to_cpu(td->link));
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out += sprintf(out, "e%d %s%s%s%s%s%s%s%s%s%sLength=%x ",
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((status >> 27) & 3),
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(status & TD_CTRL_SPD) ? "SPD " : "",
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(status & TD_CTRL_LS) ? "LS " : "",
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(status & TD_CTRL_IOC) ? "IOC " : "",
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(status & TD_CTRL_ACTIVE) ? "Active " : "",
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(status & TD_CTRL_STALLED) ? "Stalled " : "",
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(status & TD_CTRL_DBUFERR) ? "DataBufErr " : "",
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(status & TD_CTRL_BABBLE) ? "Babble " : "",
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(status & TD_CTRL_NAK) ? "NAK " : "",
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(status & TD_CTRL_CRCTIMEO) ? "CRC/Timeo " : "",
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(status & TD_CTRL_BITSTUFF) ? "BitStuff " : "",
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status & 0x7ff);
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token = td_token(td);
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switch (uhci_packetid(token)) {
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case USB_PID_SETUP:
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spid = "SETUP";
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break;
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case USB_PID_OUT:
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spid = "OUT";
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break;
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case USB_PID_IN:
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spid = "IN";
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break;
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default:
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spid = "?";
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break;
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}
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out += sprintf(out, "MaxLen=%x DT%d EndPt=%x Dev=%x, PID=%x(%s) ",
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token >> 21,
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((token >> 19) & 1),
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(token >> 15) & 15,
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(token >> 8) & 127,
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(token & 0xff),
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spid);
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out += sprintf(out, "(buf=%08x)\n", le32_to_cpu(td->buffer));
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return out - buf;
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}
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static int uhci_show_urbp(struct urb_priv *urbp, char *buf, int len, int space)
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{
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char *out = buf;
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struct uhci_td *td;
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int i, nactive, ninactive;
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char *ptype;
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if (len < 200)
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return 0;
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out += sprintf(out, "urb_priv [%p] ", urbp);
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out += sprintf(out, "urb [%p] ", urbp->urb);
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out += sprintf(out, "qh [%p] ", urbp->qh);
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out += sprintf(out, "Dev=%d ", usb_pipedevice(urbp->urb->pipe));
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out += sprintf(out, "EP=%x(%s) ", usb_pipeendpoint(urbp->urb->pipe),
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(usb_pipein(urbp->urb->pipe) ? "IN" : "OUT"));
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switch (usb_pipetype(urbp->urb->pipe)) {
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case PIPE_ISOCHRONOUS: ptype = "ISO"; break;
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case PIPE_INTERRUPT: ptype = "INT"; break;
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case PIPE_BULK: ptype = "BLK"; break;
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default:
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case PIPE_CONTROL: ptype = "CTL"; break;
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}
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out += sprintf(out, "%s%s", ptype, (urbp->fsbr ? " FSBR" : ""));
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out += sprintf(out, " Actlen=%d%s", urbp->urb->actual_length,
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(urbp->qh->type == USB_ENDPOINT_XFER_CONTROL ?
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"-8" : ""));
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if (urbp->urb->unlinked)
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out += sprintf(out, " Unlinked=%d", urbp->urb->unlinked);
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out += sprintf(out, "\n");
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i = nactive = ninactive = 0;
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list_for_each_entry(td, &urbp->td_list, list) {
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if (urbp->qh->type != USB_ENDPOINT_XFER_ISOC &&
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(++i <= 10 || debug > 2)) {
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out += sprintf(out, "%*s%d: ", space + 2, "", i);
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out += uhci_show_td(td, out, len - (out - buf), 0);
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} else {
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if (td_status(td) & TD_CTRL_ACTIVE)
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++nactive;
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else
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++ninactive;
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}
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}
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if (nactive + ninactive > 0)
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out += sprintf(out, "%*s[skipped %d inactive and %d active "
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"TDs]\n",
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space, "", ninactive, nactive);
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return out - buf;
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}
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static int uhci_show_qh(struct uhci_hcd *uhci,
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struct uhci_qh *qh, char *buf, int len, int space)
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{
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char *out = buf;
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int i, nurbs;
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__le32 element = qh_element(qh);
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char *qtype;
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/* Try to make sure there's enough memory */
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if (len < 80 * 7)
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return 0;
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switch (qh->type) {
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case USB_ENDPOINT_XFER_ISOC: qtype = "ISO"; break;
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case USB_ENDPOINT_XFER_INT: qtype = "INT"; break;
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case USB_ENDPOINT_XFER_BULK: qtype = "BLK"; break;
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case USB_ENDPOINT_XFER_CONTROL: qtype = "CTL"; break;
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default: qtype = "Skel" ; break;
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}
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out += sprintf(out, "%*s[%p] %s QH link (%08x) element (%08x)\n",
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space, "", qh, qtype,
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le32_to_cpu(qh->link), le32_to_cpu(element));
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if (qh->type == USB_ENDPOINT_XFER_ISOC)
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out += sprintf(out, "%*s period %d phase %d load %d us, "
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"frame %x desc [%p]\n",
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space, "", qh->period, qh->phase, qh->load,
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qh->iso_frame, qh->iso_packet_desc);
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else if (qh->type == USB_ENDPOINT_XFER_INT)
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out += sprintf(out, "%*s period %d phase %d load %d us\n",
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space, "", qh->period, qh->phase, qh->load);
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if (element & UHCI_PTR_QH)
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out += sprintf(out, "%*s Element points to QH (bug?)\n", space, "");
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if (element & UHCI_PTR_DEPTH)
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out += sprintf(out, "%*s Depth traverse\n", space, "");
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if (element & cpu_to_le32(8))
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out += sprintf(out, "%*s Bit 3 set (bug?)\n", space, "");
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if (!(element & ~(UHCI_PTR_QH | UHCI_PTR_DEPTH)))
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out += sprintf(out, "%*s Element is NULL (bug?)\n", space, "");
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if (list_empty(&qh->queue)) {
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out += sprintf(out, "%*s queue is empty\n", space, "");
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if (qh == uhci->skel_async_qh)
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out += uhci_show_td(uhci->term_td, out,
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len - (out - buf), 0);
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} else {
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struct urb_priv *urbp = list_entry(qh->queue.next,
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struct urb_priv, node);
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struct uhci_td *td = list_entry(urbp->td_list.next,
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struct uhci_td, list);
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if (element != LINK_TO_TD(td))
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out += sprintf(out, "%*s Element != First TD\n",
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space, "");
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i = nurbs = 0;
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list_for_each_entry(urbp, &qh->queue, node) {
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if (++i <= 10)
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out += uhci_show_urbp(urbp, out,
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len - (out - buf), space + 2);
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else
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++nurbs;
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}
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if (nurbs > 0)
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out += sprintf(out, "%*s Skipped %d URBs\n",
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space, "", nurbs);
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}
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if (qh->dummy_td) {
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out += sprintf(out, "%*s Dummy TD\n", space, "");
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out += uhci_show_td(qh->dummy_td, out, len - (out - buf), 0);
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}
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return out - buf;
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}
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static int uhci_show_sc(int port, unsigned short status, char *buf, int len)
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{
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char *out = buf;
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/* Try to make sure there's enough memory */
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if (len < 160)
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return 0;
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out += sprintf(out, " stat%d = %04x %s%s%s%s%s%s%s%s%s%s\n",
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port,
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status,
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(status & USBPORTSC_SUSP) ? " Suspend" : "",
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(status & USBPORTSC_OCC) ? " OverCurrentChange" : "",
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(status & USBPORTSC_OC) ? " OverCurrent" : "",
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(status & USBPORTSC_PR) ? " Reset" : "",
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(status & USBPORTSC_LSDA) ? " LowSpeed" : "",
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(status & USBPORTSC_RD) ? " ResumeDetect" : "",
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(status & USBPORTSC_PEC) ? " EnableChange" : "",
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(status & USBPORTSC_PE) ? " Enabled" : "",
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(status & USBPORTSC_CSC) ? " ConnectChange" : "",
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(status & USBPORTSC_CCS) ? " Connected" : "");
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return out - buf;
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}
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static int uhci_show_root_hub_state(struct uhci_hcd *uhci, char *buf, int len)
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{
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char *out = buf;
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char *rh_state;
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/* Try to make sure there's enough memory */
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if (len < 60)
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return 0;
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switch (uhci->rh_state) {
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case UHCI_RH_RESET:
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rh_state = "reset"; break;
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case UHCI_RH_SUSPENDED:
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rh_state = "suspended"; break;
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case UHCI_RH_AUTO_STOPPED:
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rh_state = "auto-stopped"; break;
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case UHCI_RH_RESUMING:
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rh_state = "resuming"; break;
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case UHCI_RH_SUSPENDING:
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rh_state = "suspending"; break;
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case UHCI_RH_RUNNING:
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rh_state = "running"; break;
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case UHCI_RH_RUNNING_NODEVS:
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rh_state = "running, no devs"; break;
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default:
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rh_state = "?"; break;
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}
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out += sprintf(out, "Root-hub state: %s FSBR: %d\n",
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rh_state, uhci->fsbr_is_on);
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return out - buf;
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}
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static int uhci_show_status(struct uhci_hcd *uhci, char *buf, int len)
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{
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char *out = buf;
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unsigned long io_addr = uhci->io_addr;
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unsigned short usbcmd, usbstat, usbint, usbfrnum;
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unsigned int flbaseadd;
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unsigned char sof;
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unsigned short portsc1, portsc2;
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/* Try to make sure there's enough memory */
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if (len < 80 * 9)
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return 0;
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usbcmd = inw(io_addr + 0);
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usbstat = inw(io_addr + 2);
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usbint = inw(io_addr + 4);
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usbfrnum = inw(io_addr + 6);
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flbaseadd = inl(io_addr + 8);
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sof = inb(io_addr + 12);
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portsc1 = inw(io_addr + 16);
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portsc2 = inw(io_addr + 18);
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out += sprintf(out, " usbcmd = %04x %s%s%s%s%s%s%s%s\n",
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usbcmd,
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(usbcmd & USBCMD_MAXP) ? "Maxp64 " : "Maxp32 ",
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(usbcmd & USBCMD_CF) ? "CF " : "",
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(usbcmd & USBCMD_SWDBG) ? "SWDBG " : "",
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(usbcmd & USBCMD_FGR) ? "FGR " : "",
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(usbcmd & USBCMD_EGSM) ? "EGSM " : "",
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(usbcmd & USBCMD_GRESET) ? "GRESET " : "",
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(usbcmd & USBCMD_HCRESET) ? "HCRESET " : "",
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(usbcmd & USBCMD_RS) ? "RS " : "");
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out += sprintf(out, " usbstat = %04x %s%s%s%s%s%s\n",
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usbstat,
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(usbstat & USBSTS_HCH) ? "HCHalted " : "",
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(usbstat & USBSTS_HCPE) ? "HostControllerProcessError " : "",
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(usbstat & USBSTS_HSE) ? "HostSystemError " : "",
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(usbstat & USBSTS_RD) ? "ResumeDetect " : "",
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(usbstat & USBSTS_ERROR) ? "USBError " : "",
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(usbstat & USBSTS_USBINT) ? "USBINT " : "");
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out += sprintf(out, " usbint = %04x\n", usbint);
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out += sprintf(out, " usbfrnum = (%d)%03x\n", (usbfrnum >> 10) & 1,
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0xfff & (4*(unsigned int)usbfrnum));
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out += sprintf(out, " flbaseadd = %08x\n", flbaseadd);
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out += sprintf(out, " sof = %02x\n", sof);
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out += uhci_show_sc(1, portsc1, out, len - (out - buf));
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out += uhci_show_sc(2, portsc2, out, len - (out - buf));
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out += sprintf(out, "Most recent frame: %x (%d) "
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"Last ISO frame: %x (%d)\n",
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uhci->frame_number, uhci->frame_number & 1023,
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uhci->last_iso_frame, uhci->last_iso_frame & 1023);
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return out - buf;
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}
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static int uhci_sprint_schedule(struct uhci_hcd *uhci, char *buf, int len)
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{
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char *out = buf;
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int i, j;
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struct uhci_qh *qh;
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struct uhci_td *td;
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struct list_head *tmp, *head;
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int nframes, nerrs;
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__le32 link;
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__le32 fsbr_link;
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static const char * const qh_names[] = {
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"unlink", "iso", "int128", "int64", "int32", "int16",
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"int8", "int4", "int2", "async", "term"
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};
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out += uhci_show_root_hub_state(uhci, out, len - (out - buf));
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out += sprintf(out, "HC status\n");
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out += uhci_show_status(uhci, out, len - (out - buf));
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out += sprintf(out, "Periodic load table\n");
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for (i = 0; i < MAX_PHASE; ++i) {
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out += sprintf(out, "\t%d", uhci->load[i]);
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if (i % 8 == 7)
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*out++ = '\n';
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}
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out += sprintf(out, "Total: %d, #INT: %d, #ISO: %d\n",
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uhci->total_load,
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uhci_to_hcd(uhci)->self.bandwidth_int_reqs,
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uhci_to_hcd(uhci)->self.bandwidth_isoc_reqs);
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if (debug <= 1)
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return out - buf;
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out += sprintf(out, "Frame List\n");
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nframes = 10;
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nerrs = 0;
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for (i = 0; i < UHCI_NUMFRAMES; ++i) {
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__le32 qh_dma;
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j = 0;
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td = uhci->frame_cpu[i];
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link = uhci->frame[i];
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if (!td)
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goto check_link;
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if (nframes > 0) {
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out += sprintf(out, "- Frame %d -> (%08x)\n",
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i, le32_to_cpu(link));
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j = 1;
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}
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head = &td->fl_list;
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tmp = head;
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do {
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td = list_entry(tmp, struct uhci_td, fl_list);
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tmp = tmp->next;
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if (link != LINK_TO_TD(td)) {
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if (nframes > 0)
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out += sprintf(out, " link does "
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"not match list entry!\n");
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else
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++nerrs;
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}
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if (nframes > 0)
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out += uhci_show_td(td, out,
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len - (out - buf), 4);
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link = td->link;
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} while (tmp != head);
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check_link:
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qh_dma = uhci_frame_skel_link(uhci, i);
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if (link != qh_dma) {
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if (nframes > 0) {
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if (!j) {
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out += sprintf(out,
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"- Frame %d -> (%08x)\n",
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i, le32_to_cpu(link));
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j = 1;
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}
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out += sprintf(out, " link does not match "
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"QH (%08x)!\n", le32_to_cpu(qh_dma));
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} else
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++nerrs;
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}
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nframes -= j;
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}
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if (nerrs > 0)
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out += sprintf(out, "Skipped %d bad links\n", nerrs);
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out += sprintf(out, "Skeleton QHs\n");
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fsbr_link = 0;
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for (i = 0; i < UHCI_NUM_SKELQH; ++i) {
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int cnt = 0;
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qh = uhci->skelqh[i];
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out += sprintf(out, "- skel_%s_qh\n", qh_names[i]); \
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out += uhci_show_qh(uhci, qh, out, len - (out - buf), 4);
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/* Last QH is the Terminating QH, it's different */
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if (i == SKEL_TERM) {
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if (qh_element(qh) != LINK_TO_TD(uhci->term_td))
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out += sprintf(out, " skel_term_qh element is not set to term_td!\n");
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link = fsbr_link;
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if (!link)
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link = LINK_TO_QH(uhci->skel_term_qh);
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goto check_qh_link;
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}
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head = &qh->node;
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tmp = head->next;
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while (tmp != head) {
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qh = list_entry(tmp, struct uhci_qh, node);
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tmp = tmp->next;
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if (++cnt <= 10)
|
|
out += uhci_show_qh(uhci, qh, out,
|
|
len - (out - buf), 4);
|
|
if (!fsbr_link && qh->skel >= SKEL_FSBR)
|
|
fsbr_link = LINK_TO_QH(qh);
|
|
}
|
|
if ((cnt -= 10) > 0)
|
|
out += sprintf(out, " Skipped %d QHs\n", cnt);
|
|
|
|
link = UHCI_PTR_TERM;
|
|
if (i <= SKEL_ISO)
|
|
;
|
|
else if (i < SKEL_ASYNC)
|
|
link = LINK_TO_QH(uhci->skel_async_qh);
|
|
else if (!uhci->fsbr_is_on)
|
|
;
|
|
else
|
|
link = LINK_TO_QH(uhci->skel_term_qh);
|
|
check_qh_link:
|
|
if (qh->link != link)
|
|
out += sprintf(out, " last QH not linked to next skeleton!\n");
|
|
}
|
|
|
|
return out - buf;
|
|
}
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
|
|
#define MAX_OUTPUT (64 * 1024)
|
|
|
|
struct uhci_debug {
|
|
int size;
|
|
char *data;
|
|
};
|
|
|
|
static int uhci_debug_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct uhci_hcd *uhci = inode->i_private;
|
|
struct uhci_debug *up;
|
|
int ret = -ENOMEM;
|
|
unsigned long flags;
|
|
|
|
lock_kernel();
|
|
up = kmalloc(sizeof(*up), GFP_KERNEL);
|
|
if (!up)
|
|
goto out;
|
|
|
|
up->data = kmalloc(MAX_OUTPUT, GFP_KERNEL);
|
|
if (!up->data) {
|
|
kfree(up);
|
|
goto out;
|
|
}
|
|
|
|
up->size = 0;
|
|
spin_lock_irqsave(&uhci->lock, flags);
|
|
if (uhci->is_initialized)
|
|
up->size = uhci_sprint_schedule(uhci, up->data, MAX_OUTPUT);
|
|
spin_unlock_irqrestore(&uhci->lock, flags);
|
|
|
|
file->private_data = up;
|
|
|
|
ret = 0;
|
|
out:
|
|
unlock_kernel();
|
|
return ret;
|
|
}
|
|
|
|
static loff_t uhci_debug_lseek(struct file *file, loff_t off, int whence)
|
|
{
|
|
struct uhci_debug *up;
|
|
loff_t new = -1;
|
|
|
|
lock_kernel();
|
|
up = file->private_data;
|
|
|
|
switch (whence) {
|
|
case 0:
|
|
new = off;
|
|
break;
|
|
case 1:
|
|
new = file->f_pos + off;
|
|
break;
|
|
}
|
|
if (new < 0 || new > up->size) {
|
|
unlock_kernel();
|
|
return -EINVAL;
|
|
}
|
|
unlock_kernel();
|
|
return (file->f_pos = new);
|
|
}
|
|
|
|
static ssize_t uhci_debug_read(struct file *file, char __user *buf,
|
|
size_t nbytes, loff_t *ppos)
|
|
{
|
|
struct uhci_debug *up = file->private_data;
|
|
return simple_read_from_buffer(buf, nbytes, ppos, up->data, up->size);
|
|
}
|
|
|
|
static int uhci_debug_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct uhci_debug *up = file->private_data;
|
|
|
|
kfree(up->data);
|
|
kfree(up);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#undef uhci_debug_operations
|
|
static const struct file_operations uhci_debug_operations = {
|
|
.owner = THIS_MODULE,
|
|
.open = uhci_debug_open,
|
|
.llseek = uhci_debug_lseek,
|
|
.read = uhci_debug_read,
|
|
.release = uhci_debug_release,
|
|
};
|
|
|
|
#endif /* CONFIG_DEBUG_FS */
|
|
|
|
#else /* DEBUG */
|
|
|
|
static inline void lprintk(char *buf)
|
|
{}
|
|
|
|
static inline int uhci_show_qh(struct uhci_hcd *uhci,
|
|
struct uhci_qh *qh, char *buf, int len, int space)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int uhci_sprint_schedule(struct uhci_hcd *uhci,
|
|
char *buf, int len)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
#endif
|