* UHCI-specific debugging code. Invaluable when something
* goes wrong, but don't get in my face.
*
- * Kernel visible pointers are surrounded in []'s and bus
- * visible pointers are surrounded in ()'s
+ * Kernel visible pointers are surrounded in []s and bus
+ * visible pointers are surrounded in ()s
*
* (C) Copyright 1999 Linus Torvalds
* (C) Copyright 1999-2001 Johannes Erdfelt
#include "uhci-hcd.h"
-static struct dentry *uhci_debugfs_root = NULL;
+#define uhci_debug_operations (* (struct file_operations *) NULL)
+static struct dentry *uhci_debugfs_root;
-/* Handle REALLY large printk's so we don't overflow buffers */
-static inline void lprintk(char *buf)
+#ifdef DEBUG
+
+/* Handle REALLY large printks so we don't overflow buffers */
+static void lprintk(char *buf)
{
char *p;
return out - buf;
}
-static int uhci_show_qh(struct uhci_qh *qh, char *buf, int len, int space)
+static int uhci_show_urbp(struct urb_priv *urbp, char *buf, int len, int space)
{
char *out = buf;
- struct urb_priv *urbp;
- struct list_head *head, *tmp;
struct uhci_td *td;
- int i = 0, checked = 0, prevactive = 0;
+ int i, nactive, ninactive;
+
+ if (len < 200)
+ return 0;
+
+ out += sprintf(out, "urb_priv [%p] ", urbp);
+ out += sprintf(out, "urb [%p] ", urbp->urb);
+ out += sprintf(out, "qh [%p] ", urbp->qh);
+ out += sprintf(out, "Dev=%d ", usb_pipedevice(urbp->urb->pipe));
+ out += sprintf(out, "EP=%x(%s) ", usb_pipeendpoint(urbp->urb->pipe),
+ (usb_pipein(urbp->urb->pipe) ? "IN" : "OUT"));
+
+ switch (usb_pipetype(urbp->urb->pipe)) {
+ case PIPE_ISOCHRONOUS: out += sprintf(out, "ISO"); break;
+ case PIPE_INTERRUPT: out += sprintf(out, "INT"); break;
+ case PIPE_BULK: out += sprintf(out, "BLK"); break;
+ case PIPE_CONTROL: out += sprintf(out, "CTL"); break;
+ }
+
+ out += sprintf(out, "%s", (urbp->fsbr ? " FSBR" : ""));
+
+ if (urbp->urb->status != -EINPROGRESS)
+ out += sprintf(out, " Status=%d", urbp->urb->status);
+ out += sprintf(out, "\n");
+
+ i = nactive = ninactive = 0;
+ list_for_each_entry(td, &urbp->td_list, list) {
+ if (++i <= 10 || debug > 2) {
+ out += sprintf(out, "%*s%d: ", space + 2, "", i);
+ out += uhci_show_td(td, out, len - (out - buf), 0);
+ } else {
+ if (td_status(td) & TD_CTRL_ACTIVE)
+ ++nactive;
+ else
+ ++ninactive;
+ }
+ }
+ if (nactive + ninactive > 0)
+ out += sprintf(out, "%*s[skipped %d inactive and %d active "
+ "TDs]\n",
+ space, "", ninactive, nactive);
+
+ return out - buf;
+}
+
+static int uhci_show_qh(struct uhci_qh *qh, char *buf, int len, int space)
+{
+ char *out = buf;
+ int i, nurbs;
__le32 element = qh_element(qh);
/* Try to make sure there's enough memory */
if (!(element & ~(UHCI_PTR_QH | UHCI_PTR_DEPTH)))
out += sprintf(out, "%*s Element is NULL (bug?)\n", space, "");
- if (!qh->urbp) {
- out += sprintf(out, "%*s urbp == NULL\n", space, "");
- goto out;
- }
-
- urbp = qh->urbp;
-
- head = &urbp->td_list;
- tmp = head->next;
-
- td = list_entry(tmp, struct uhci_td, list);
-
- if (cpu_to_le32(td->dma_handle) != (element & ~UHCI_PTR_BITS))
- out += sprintf(out, "%*s Element != First TD\n", space, "");
-
- while (tmp != head) {
- struct uhci_td *td = list_entry(tmp, struct uhci_td, list);
-
- tmp = tmp->next;
-
- out += sprintf(out, "%*s%d: ", space + 2, "", i++);
- out += uhci_show_td(td, out, len - (out - buf), 0);
-
- if (i > 10 && !checked && prevactive && tmp != head &&
- debug <= 2) {
- struct list_head *ntmp = tmp;
- struct uhci_td *ntd = td;
- int active = 1, ni = i;
-
- checked = 1;
-
- while (ntmp != head && ntmp->next != head && active) {
- ntd = list_entry(ntmp, struct uhci_td, list);
-
- ntmp = ntmp->next;
-
- active = td_status(ntd) & TD_CTRL_ACTIVE;
-
- ni++;
- }
-
- if (active && ni > i) {
- out += sprintf(out, "%*s[skipped %d active TD's]\n", space, "", ni - i);
- tmp = ntmp;
- td = ntd;
- i = ni;
- }
+ if (list_empty(&qh->queue)) {
+ out += sprintf(out, "%*s queue is empty\n", space, "");
+ } else {
+ struct urb_priv *urbp = list_entry(qh->queue.next,
+ struct urb_priv, node);
+ struct uhci_td *td = list_entry(urbp->td_list.next,
+ struct uhci_td, list);
+
+ if (cpu_to_le32(td->dma_handle) != (element & ~UHCI_PTR_BITS))
+ out += sprintf(out, "%*s Element != First TD\n",
+ space, "");
+ i = nurbs = 0;
+ list_for_each_entry(urbp, &qh->queue, node) {
+ if (++i <= 10)
+ out += uhci_show_urbp(urbp, out,
+ len - (out - buf), space + 2);
+ else
+ ++nurbs;
}
-
- prevactive = td_status(td) & TD_CTRL_ACTIVE;
+ if (nurbs > 0)
+ out += sprintf(out, "%*s Skipped %d URBs\n",
+ space, "", nurbs);
}
- if (list_empty(&urbp->queue_list) || urbp->queued)
- goto out;
-
- out += sprintf(out, "%*sQueued QH's:\n", -space, "--");
-
- head = &urbp->queue_list;
- tmp = head->next;
-
- while (tmp != head) {
- struct urb_priv *nurbp = list_entry(tmp, struct urb_priv,
- queue_list);
- tmp = tmp->next;
-
- out += uhci_show_qh(nurbp->qh, out, len - (out - buf), space);
+ if (qh->udev) {
+ out += sprintf(out, "%*s Dummy TD\n", space, "");
+ out += uhci_show_td(qh->dummy_td, out, len - (out - buf), 0);
}
-out:
return out - buf;
}
-#define show_frame_num() \
- if (!shown) { \
- shown = 1; \
- out += sprintf(out, "- Frame %d\n", i); \
- }
-
-#ifdef CONFIG_PROC_FS
-static const char *qh_names[] = {
+static const char * const qh_names[] = {
+ "skel_unlink_qh", "skel_iso_qh",
"skel_int128_qh", "skel_int64_qh",
"skel_int32_qh", "skel_int16_qh",
"skel_int8_qh", "skel_int4_qh",
"skel_bulk_qh", "skel_term_qh"
};
-#define show_qh_name() \
- if (!shown) { \
- shown = 1; \
- out += sprintf(out, "- %s\n", qh_names[i]); \
- }
-
static int uhci_show_sc(int port, unsigned short status, char *buf, int len)
{
char *out = buf;
return out - buf;
}
+static int uhci_show_root_hub_state(struct uhci_hcd *uhci, char *buf, int len)
+{
+ char *out = buf;
+ char *rh_state;
+
+ /* Try to make sure there's enough memory */
+ if (len < 60)
+ return 0;
+
+ switch (uhci->rh_state) {
+ case UHCI_RH_RESET:
+ rh_state = "reset"; break;
+ case UHCI_RH_SUSPENDED:
+ rh_state = "suspended"; break;
+ case UHCI_RH_AUTO_STOPPED:
+ rh_state = "auto-stopped"; break;
+ case UHCI_RH_RESUMING:
+ rh_state = "resuming"; break;
+ case UHCI_RH_SUSPENDING:
+ rh_state = "suspending"; break;
+ case UHCI_RH_RUNNING:
+ rh_state = "running"; break;
+ case UHCI_RH_RUNNING_NODEVS:
+ rh_state = "running, no devs"; break;
+ default:
+ rh_state = "?"; break;
+ }
+ out += sprintf(out, "Root-hub state: %s\n", rh_state);
+ return out - buf;
+}
+
static int uhci_show_status(struct uhci_hcd *uhci, char *buf, int len)
{
char *out = buf;
return out - buf;
}
-static int uhci_show_urbp(struct uhci_hcd *uhci, struct urb_priv *urbp, char *buf, int len)
-{
- struct list_head *tmp;
- char *out = buf;
- int count = 0;
-
- if (len < 200)
- return 0;
-
- out += sprintf(out, "urb_priv [%p] ", urbp);
- out += sprintf(out, "urb [%p] ", urbp->urb);
- out += sprintf(out, "qh [%p] ", urbp->qh);
- out += sprintf(out, "Dev=%d ", usb_pipedevice(urbp->urb->pipe));
- out += sprintf(out, "EP=%x(%s) ", usb_pipeendpoint(urbp->urb->pipe), (usb_pipein(urbp->urb->pipe) ? "IN" : "OUT"));
-
- switch (usb_pipetype(urbp->urb->pipe)) {
- case PIPE_ISOCHRONOUS: out += sprintf(out, "ISO "); break;
- case PIPE_INTERRUPT: out += sprintf(out, "INT "); break;
- case PIPE_BULK: out += sprintf(out, "BLK "); break;
- case PIPE_CONTROL: out += sprintf(out, "CTL "); break;
- }
-
- out += sprintf(out, "%s", (urbp->fsbr ? "FSBR " : ""));
- out += sprintf(out, "%s", (urbp->fsbr_timeout ? "FSBR_TO " : ""));
-
- if (urbp->urb->status != -EINPROGRESS)
- out += sprintf(out, "Status=%d ", urbp->urb->status);
- //out += sprintf(out, "Inserttime=%lx ",urbp->inserttime);
- //out += sprintf(out, "FSBRtime=%lx ",urbp->fsbrtime);
-
- count = 0;
- list_for_each(tmp, &urbp->td_list)
- count++;
- out += sprintf(out, "TDs=%d ",count);
-
- if (urbp->queued)
- out += sprintf(out, "queued\n");
- else {
- count = 0;
- list_for_each(tmp, &urbp->queue_list)
- count++;
- out += sprintf(out, "queued URBs=%d\n", count);
- }
-
- return out - buf;
-}
-
-static int uhci_show_lists(struct uhci_hcd *uhci, char *buf, int len)
-{
- char *out = buf;
- struct list_head *head, *tmp;
- int count;
-
- out += sprintf(out, "Main list URBs:");
- if (list_empty(&uhci->urb_list))
- out += sprintf(out, " Empty\n");
- else {
- out += sprintf(out, "\n");
- count = 0;
- head = &uhci->urb_list;
- tmp = head->next;
- while (tmp != head) {
- struct urb_priv *urbp = list_entry(tmp, struct urb_priv, urb_list);
-
- out += sprintf(out, " %d: ", ++count);
- out += uhci_show_urbp(uhci, urbp, out, len - (out - buf));
- tmp = tmp->next;
- }
- }
-
- out += sprintf(out, "Remove list URBs:");
- if (list_empty(&uhci->urb_remove_list))
- out += sprintf(out, " Empty\n");
- else {
- out += sprintf(out, "\n");
- count = 0;
- head = &uhci->urb_remove_list;
- tmp = head->next;
- while (tmp != head) {
- struct urb_priv *urbp = list_entry(tmp, struct urb_priv, urb_list);
-
- out += sprintf(out, " %d: ", ++count);
- out += uhci_show_urbp(uhci, urbp, out, len - (out - buf));
- tmp = tmp->next;
- }
- }
-
- out += sprintf(out, "Complete list URBs:");
- if (list_empty(&uhci->complete_list))
- out += sprintf(out, " Empty\n");
- else {
- out += sprintf(out, "\n");
- count = 0;
- head = &uhci->complete_list;
- tmp = head->next;
- while (tmp != head) {
- struct urb_priv *urbp = list_entry(tmp, struct urb_priv, urb_list);
-
- out += sprintf(out, " %d: ", ++count);
- out += uhci_show_urbp(uhci, urbp, out, len - (out - buf));
- tmp = tmp->next;
- }
- }
-
- return out - buf;
-}
-
static int uhci_sprint_schedule(struct uhci_hcd *uhci, char *buf, int len)
{
- unsigned long flags;
char *out = buf;
int i, j;
struct uhci_qh *qh;
struct uhci_td *td;
struct list_head *tmp, *head;
- spin_lock_irqsave(&uhci->lock, flags);
-
+ out += uhci_show_root_hub_state(uhci, out, len - (out - buf));
out += sprintf(out, "HC status\n");
out += uhci_show_status(uhci, out, len - (out - buf));
+ if (debug <= 1)
+ return out - buf;
out += sprintf(out, "Frame List\n");
for (i = 0; i < UHCI_NUMFRAMES; ++i) {
- int shown = 0;
- td = uhci->fl->frame_cpu[i];
+ td = uhci->frame_cpu[i];
if (!td)
continue;
- if (td->dma_handle != (dma_addr_t)uhci->fl->frame[i]) {
- show_frame_num();
+ out += sprintf(out, "- Frame %d\n", i); \
+ if (td->dma_handle != (dma_addr_t)uhci->frame[i])
out += sprintf(out, " frame list does not match td->dma_handle!\n");
- }
- show_frame_num();
head = &td->fl_list;
tmp = head;
} while (tmp != head);
}
- out += sprintf(out, "Skeleton QH's\n");
+ out += sprintf(out, "Skeleton QHs\n");
for (i = 0; i < UHCI_NUM_SKELQH; ++i) {
- int shown = 0;
+ int cnt = 0;
qh = uhci->skelqh[i];
-
- if (debug > 1) {
- show_qh_name();
- out += uhci_show_qh(qh, out, len - (out - buf), 4);
- }
+ out += sprintf(out, "- %s\n", qh_names[i]); \
+ out += uhci_show_qh(qh, out, len - (out - buf), 4);
/* Last QH is the Terminating QH, it's different */
if (i == UHCI_NUM_SKELQH - 1) {
continue;
}
- j = (i < 7) ? 7 : i+1; /* Next skeleton */
- if (list_empty(&qh->list)) {
- if (i < UHCI_NUM_SKELQH - 1) {
- if (qh->link !=
- (cpu_to_le32(uhci->skelqh[j]->dma_handle) | UHCI_PTR_QH)) {
- show_qh_name();
- out += sprintf(out, " skeleton QH not linked to next skeleton QH!\n");
- }
- }
-
- continue;
- }
-
- show_qh_name();
-
- head = &qh->list;
+ j = (i < 9) ? 9 : i+1; /* Next skeleton */
+ head = &qh->node;
tmp = head->next;
while (tmp != head) {
- qh = list_entry(tmp, struct uhci_qh, list);
-
+ qh = list_entry(tmp, struct uhci_qh, node);
tmp = tmp->next;
-
- out += uhci_show_qh(qh, out, len - (out - buf), 4);
+ if (++cnt <= 10)
+ out += uhci_show_qh(qh, out,
+ len - (out - buf), 4);
}
+ if ((cnt -= 10) > 0)
+ out += sprintf(out, " Skipped %d QHs\n", cnt);
- if (i < UHCI_NUM_SKELQH - 1) {
+ if (i > 1 && i < UHCI_NUM_SKELQH - 1) {
if (qh->link !=
(cpu_to_le32(uhci->skelqh[j]->dma_handle) | UHCI_PTR_QH))
out += sprintf(out, " last QH not linked to next skeleton!\n");
}
}
- if (debug > 2)
- out += uhci_show_lists(uhci, out, len - (out - buf));
-
- spin_unlock_irqrestore(&uhci->lock, flags);
-
return out - buf;
}
+#ifdef CONFIG_DEBUG_FS
+
#define MAX_OUTPUT (64 * 1024)
struct uhci_debug {
int size;
char *data;
- struct uhci_hcd *uhci;
};
static int uhci_debug_open(struct inode *inode, struct file *file)
struct uhci_hcd *uhci = inode->u.generic_ip;
struct uhci_debug *up;
int ret = -ENOMEM;
+ unsigned long flags;
lock_kernel();
up = kmalloc(sizeof(*up), GFP_KERNEL);
goto out;
}
- up->size = uhci_sprint_schedule(uhci, up->data, MAX_OUTPUT);
+ 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;
return 0;
}
+#undef uhci_debug_operations
static 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,
};
-#else /* CONFIG_DEBUG_FS */
+#endif /* CONFIG_DEBUG_FS */
-#define uhci_debug_operations (* (struct file_operations *) NULL)
+#else /* DEBUG */
+
+static inline void lprintk(char *buf)
+{}
+
+static inline int uhci_show_qh(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
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