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path: root/drivers/usb/host/uhci-debug.c
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Diffstat (limited to 'drivers/usb/host/uhci-debug.c')
-rw-r--r--drivers/usb/host/uhci-debug.c289
1 files changed, 175 insertions, 114 deletions
diff --git a/drivers/usb/host/uhci-debug.c b/drivers/usb/host/uhci-debug.c
index e52b954dda4..1b28a000d5c 100644
--- a/drivers/usb/host/uhci-debug.c
+++ b/drivers/usb/host/uhci-debug.c
@@ -9,17 +9,18 @@
* (C) Copyright 1999-2001 Johannes Erdfelt
*/
+#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/debugfs.h>
-#include <linux/smp_lock.h>
#include <asm/io.h>
#include "uhci-hcd.h"
-#define uhci_debug_operations (* (const struct file_operations *) NULL)
+#define EXTRA_SPACE 1024
+
static struct dentry *uhci_debugfs_root;
-#ifdef DEBUG
+#ifdef CONFIG_DYNAMIC_DEBUG
/* Handle REALLY large printks so we don't overflow buffers */
static void lprintk(char *buf)
@@ -38,18 +39,16 @@ static void lprintk(char *buf)
}
}
-static int uhci_show_td(struct uhci_td *td, char *buf, int len, int space)
+static int uhci_show_td(struct uhci_hcd *uhci, struct uhci_td *td, char *buf,
+ int len, int space)
{
char *out = buf;
char *spid;
u32 status, token;
- /* Try to make sure there's enough memory */
- if (len < 160)
- return 0;
-
- status = td_status(td);
- out += sprintf(out, "%*s[%p] link (%08x) ", space, "", td, le32_to_cpu(td->link));
+ status = td_status(uhci, td);
+ out += sprintf(out, "%*s[%p] link (%08x) ", space, "", td,
+ hc32_to_cpu(uhci, td->link));
out += sprintf(out, "e%d %s%s%s%s%s%s%s%s%s%sLength=%x ",
((status >> 27) & 3),
(status & TD_CTRL_SPD) ? "SPD " : "",
@@ -63,8 +62,10 @@ static int uhci_show_td(struct uhci_td *td, char *buf, int len, int space)
(status & TD_CTRL_CRCTIMEO) ? "CRC/Timeo " : "",
(status & TD_CTRL_BITSTUFF) ? "BitStuff " : "",
status & 0x7ff);
+ if (out - buf > len)
+ goto done;
- token = td_token(td);
+ token = td_token(uhci, td);
switch (uhci_packetid(token)) {
case USB_PID_SETUP:
spid = "SETUP";
@@ -87,20 +88,22 @@ static int uhci_show_td(struct uhci_td *td, char *buf, int len, int space)
(token >> 8) & 127,
(token & 0xff),
spid);
- out += sprintf(out, "(buf=%08x)\n", le32_to_cpu(td->buffer));
+ out += sprintf(out, "(buf=%08x)\n", hc32_to_cpu(uhci, td->buffer));
+done:
+ if (out - buf > len)
+ out += sprintf(out, " ...\n");
return out - buf;
}
-static int uhci_show_urbp(struct urb_priv *urbp, char *buf, int len, int space)
+static int uhci_show_urbp(struct uhci_hcd *uhci, struct urb_priv *urbp,
+ char *buf, int len, int space)
{
char *out = buf;
struct uhci_td *td;
int i, nactive, ninactive;
char *ptype;
- if (len < 200)
- return 0;
out += sprintf(out, "urb_priv [%p] ", urbp);
out += sprintf(out, "urb [%p] ", urbp->urb);
@@ -108,6 +111,8 @@ static int uhci_show_urbp(struct urb_priv *urbp, char *buf, int len, int space)
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"));
+ if (out - buf > len)
+ goto done;
switch (usb_pipetype(urbp->urb->pipe)) {
case PIPE_ISOCHRONOUS: ptype = "ISO"; break;
@@ -126,24 +131,33 @@ static int uhci_show_urbp(struct urb_priv *urbp, char *buf, int len, int space)
out += sprintf(out, " Unlinked=%d", urbp->urb->unlinked);
out += sprintf(out, "\n");
+ if (out - buf > len)
+ goto done;
+
i = nactive = ninactive = 0;
list_for_each_entry(td, &urbp->td_list, list) {
if (urbp->qh->type != USB_ENDPOINT_XFER_ISOC &&
(++i <= 10 || debug > 2)) {
out += sprintf(out, "%*s%d: ", space + 2, "", i);
- out += uhci_show_td(td, out, len - (out - buf), 0);
+ out += uhci_show_td(uhci, td, out,
+ len - (out - buf), 0);
+ if (out - buf > len)
+ goto tail;
} else {
- if (td_status(td) & TD_CTRL_ACTIVE)
+ if (td_status(uhci, td) & TD_CTRL_ACTIVE)
++nactive;
else
++ninactive;
}
}
if (nactive + ninactive > 0)
- out += sprintf(out, "%*s[skipped %d inactive and %d active "
- "TDs]\n",
+ out += sprintf(out,
+ "%*s[skipped %d inactive and %d active TDs]\n",
space, "", ninactive, nactive);
-
+done:
+ if (out - buf > len)
+ out += sprintf(out, " ...\n");
+tail:
return out - buf;
}
@@ -152,13 +166,9 @@ static int uhci_show_qh(struct uhci_hcd *uhci,
{
char *out = buf;
int i, nurbs;
- __le32 element = qh_element(qh);
+ __hc32 element = qh_element(qh);
char *qtype;
- /* Try to make sure there's enough memory */
- if (len < 80 * 7)
- return 0;
-
switch (qh->type) {
case USB_ENDPOINT_XFER_ISOC: qtype = "ISO"; break;
case USB_ENDPOINT_XFER_INT: qtype = "INT"; break;
@@ -169,47 +179,59 @@ static int uhci_show_qh(struct uhci_hcd *uhci,
out += sprintf(out, "%*s[%p] %s QH link (%08x) element (%08x)\n",
space, "", qh, qtype,
- le32_to_cpu(qh->link), le32_to_cpu(element));
+ hc32_to_cpu(uhci, qh->link),
+ hc32_to_cpu(uhci, element));
if (qh->type == USB_ENDPOINT_XFER_ISOC)
- out += sprintf(out, "%*s period %d phase %d load %d us, "
- "frame %x desc [%p]\n",
+ out += sprintf(out,
+ "%*s period %d phase %d load %d us, frame %x desc [%p]\n",
space, "", qh->period, qh->phase, qh->load,
qh->iso_frame, qh->iso_packet_desc);
else if (qh->type == USB_ENDPOINT_XFER_INT)
out += sprintf(out, "%*s period %d phase %d load %d us\n",
space, "", qh->period, qh->phase, qh->load);
+ if (out - buf > len)
+ goto done;
- if (element & UHCI_PTR_QH)
+ if (element & UHCI_PTR_QH(uhci))
out += sprintf(out, "%*s Element points to QH (bug?)\n", space, "");
- if (element & UHCI_PTR_DEPTH)
+ if (element & UHCI_PTR_DEPTH(uhci))
out += sprintf(out, "%*s Depth traverse\n", space, "");
- if (element & cpu_to_le32(8))
+ if (element & cpu_to_hc32(uhci, 8))
out += sprintf(out, "%*s Bit 3 set (bug?)\n", space, "");
- if (!(element & ~(UHCI_PTR_QH | UHCI_PTR_DEPTH)))
+ if (!(element & ~(UHCI_PTR_QH(uhci) | UHCI_PTR_DEPTH(uhci))))
out += sprintf(out, "%*s Element is NULL (bug?)\n", space, "");
+ if (out - buf > len)
+ goto done;
+
if (list_empty(&qh->queue)) {
out += sprintf(out, "%*s queue is empty\n", space, "");
- if (qh == uhci->skel_async_qh)
- out += uhci_show_td(uhci->term_td, out,
+ if (qh == uhci->skel_async_qh) {
+ out += uhci_show_td(uhci, uhci->term_td, out,
len - (out - buf), 0);
+ if (out - buf > len)
+ goto tail;
+ }
} 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 (element != LINK_TO_TD(td))
+ if (element != LINK_TO_TD(uhci, td))
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,
+ if (++i <= 10) {
+ out += uhci_show_urbp(uhci, urbp, out,
len - (out - buf), space + 2);
+ if (out - buf > len)
+ goto tail;
+ }
else
++nurbs;
}
@@ -218,23 +240,27 @@ static int uhci_show_qh(struct uhci_hcd *uhci,
space, "", nurbs);
}
+ if (out - buf > len)
+ goto done;
+
if (qh->dummy_td) {
out += sprintf(out, "%*s Dummy TD\n", space, "");
- out += uhci_show_td(qh->dummy_td, out, len - (out - buf), 0);
+ out += uhci_show_td(uhci, qh->dummy_td, out,
+ len - (out - buf), 0);
+ if (out - buf > len)
+ goto tail;
}
+done:
+ if (out - buf > len)
+ out += sprintf(out, " ...\n");
+tail:
return out - buf;
}
-static int uhci_show_sc(int port, unsigned short status, char *buf, int len)
+static int uhci_show_sc(int port, unsigned short status, char *buf)
{
- char *out = buf;
-
- /* Try to make sure there's enough memory */
- if (len < 160)
- return 0;
-
- out += sprintf(out, " stat%d = %04x %s%s%s%s%s%s%s%s%s%s\n",
+ return sprintf(buf, " stat%d = %04x %s%s%s%s%s%s%s%s%s%s\n",
port,
status,
(status & USBPORTSC_SUSP) ? " Suspend" : "",
@@ -247,19 +273,12 @@ static int uhci_show_sc(int port, unsigned short status, char *buf, int len)
(status & USBPORTSC_PE) ? " Enabled" : "",
(status & USBPORTSC_CSC) ? " ConnectChange" : "",
(status & USBPORTSC_CCS) ? " Connected" : "");
-
- return out - buf;
}
-static int uhci_show_root_hub_state(struct uhci_hcd *uhci, char *buf, int len)
+static int uhci_show_root_hub_state(struct uhci_hcd *uhci, char *buf)
{
- 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;
@@ -278,32 +297,27 @@ static int uhci_show_root_hub_state(struct uhci_hcd *uhci, char *buf, int len)
default:
rh_state = "?"; break;
}
- out += sprintf(out, "Root-hub state: %s FSBR: %d\n",
+ return sprintf(buf, "Root-hub state: %s FSBR: %d\n",
rh_state, uhci->fsbr_is_on);
- return out - buf;
}
static int uhci_show_status(struct uhci_hcd *uhci, char *buf, int len)
{
char *out = buf;
- unsigned long io_addr = uhci->io_addr;
unsigned short usbcmd, usbstat, usbint, usbfrnum;
unsigned int flbaseadd;
unsigned char sof;
unsigned short portsc1, portsc2;
- /* Try to make sure there's enough memory */
- if (len < 80 * 9)
- return 0;
- usbcmd = inw(io_addr + 0);
- usbstat = inw(io_addr + 2);
- usbint = inw(io_addr + 4);
- usbfrnum = inw(io_addr + 6);
- flbaseadd = inl(io_addr + 8);
- sof = inb(io_addr + 12);
- portsc1 = inw(io_addr + 16);
- portsc2 = inw(io_addr + 18);
+ usbcmd = uhci_readw(uhci, USBCMD);
+ usbstat = uhci_readw(uhci, USBSTS);
+ usbint = uhci_readw(uhci, USBINTR);
+ usbfrnum = uhci_readw(uhci, USBFRNUM);
+ flbaseadd = uhci_readl(uhci, USBFLBASEADD);
+ sof = uhci_readb(uhci, USBSOF);
+ portsc1 = uhci_readw(uhci, USBPORTSC1);
+ portsc2 = uhci_readw(uhci, USBPORTSC2);
out += sprintf(out, " usbcmd = %04x %s%s%s%s%s%s%s%s\n",
usbcmd,
@@ -315,6 +329,8 @@ static int uhci_show_status(struct uhci_hcd *uhci, char *buf, int len)
(usbcmd & USBCMD_GRESET) ? "GRESET " : "",
(usbcmd & USBCMD_HCRESET) ? "HCRESET " : "",
(usbcmd & USBCMD_RS) ? "RS " : "");
+ if (out - buf > len)
+ goto done;
out += sprintf(out, " usbstat = %04x %s%s%s%s%s%s\n",
usbstat,
@@ -324,19 +340,33 @@ static int uhci_show_status(struct uhci_hcd *uhci, char *buf, int len)
(usbstat & USBSTS_RD) ? "ResumeDetect " : "",
(usbstat & USBSTS_ERROR) ? "USBError " : "",
(usbstat & USBSTS_USBINT) ? "USBINT " : "");
+ if (out - buf > len)
+ goto done;
out += sprintf(out, " usbint = %04x\n", usbint);
out += sprintf(out, " usbfrnum = (%d)%03x\n", (usbfrnum >> 10) & 1,
0xfff & (4*(unsigned int)usbfrnum));
out += sprintf(out, " flbaseadd = %08x\n", flbaseadd);
out += sprintf(out, " sof = %02x\n", sof);
- out += uhci_show_sc(1, portsc1, out, len - (out - buf));
- out += uhci_show_sc(2, portsc2, out, len - (out - buf));
- out += sprintf(out, "Most recent frame: %x (%d) "
- "Last ISO frame: %x (%d)\n",
+ if (out - buf > len)
+ goto done;
+
+ out += uhci_show_sc(1, portsc1, out);
+ if (out - buf > len)
+ goto done;
+
+ out += uhci_show_sc(2, portsc2, out);
+ if (out - buf > len)
+ goto done;
+
+ out += sprintf(out,
+ "Most recent frame: %x (%d) Last ISO frame: %x (%d)\n",
uhci->frame_number, uhci->frame_number & 1023,
uhci->last_iso_frame, uhci->last_iso_frame & 1023);
+done:
+ if (out - buf > len)
+ out += sprintf(out, " ...\n");
return out - buf;
}
@@ -348,17 +378,21 @@ static int uhci_sprint_schedule(struct uhci_hcd *uhci, char *buf, int len)
struct uhci_td *td;
struct list_head *tmp, *head;
int nframes, nerrs;
- __le32 link;
- __le32 fsbr_link;
+ __hc32 link;
+ __hc32 fsbr_link;
static const char * const qh_names[] = {
"unlink", "iso", "int128", "int64", "int32", "int16",
"int8", "int4", "int2", "async", "term"
};
- out += uhci_show_root_hub_state(uhci, out, len - (out - buf));
+ out += uhci_show_root_hub_state(uhci, out);
+ if (out - buf > len)
+ goto done;
out += sprintf(out, "HC status\n");
out += uhci_show_status(uhci, out, len - (out - buf));
+ if (out - buf > len)
+ goto tail;
out += sprintf(out, "Periodic load table\n");
for (i = 0; i < MAX_PHASE; ++i) {
@@ -371,14 +405,16 @@ static int uhci_sprint_schedule(struct uhci_hcd *uhci, char *buf, int len)
uhci_to_hcd(uhci)->self.bandwidth_int_reqs,
uhci_to_hcd(uhci)->self.bandwidth_isoc_reqs);
if (debug <= 1)
- return out - buf;
+ goto tail;
out += sprintf(out, "Frame List\n");
nframes = 10;
nerrs = 0;
for (i = 0; i < UHCI_NUMFRAMES; ++i) {
- __le32 qh_dma;
+ __hc32 qh_dma;
+ if (out - buf > len)
+ goto done;
j = 0;
td = uhci->frame_cpu[i];
link = uhci->frame[i];
@@ -387,7 +423,7 @@ static int uhci_sprint_schedule(struct uhci_hcd *uhci, char *buf, int len)
if (nframes > 0) {
out += sprintf(out, "- Frame %d -> (%08x)\n",
- i, le32_to_cpu(link));
+ i, hc32_to_cpu(uhci, link));
j = 1;
}
@@ -396,16 +432,21 @@ static int uhci_sprint_schedule(struct uhci_hcd *uhci, char *buf, int len)
do {
td = list_entry(tmp, struct uhci_td, fl_list);
tmp = tmp->next;
- if (link != LINK_TO_TD(td)) {
- if (nframes > 0)
- out += sprintf(out, " link does "
- "not match list entry!\n");
- else
+ if (link != LINK_TO_TD(uhci, td)) {
+ if (nframes > 0) {
+ out += sprintf(out,
+ " link does not match list entry!\n");
+ if (out - buf > len)
+ goto done;
+ } else
++nerrs;
}
- if (nframes > 0)
- out += uhci_show_td(td, out,
+ if (nframes > 0) {
+ out += uhci_show_td(uhci, td, out,
len - (out - buf), 4);
+ if (out - buf > len)
+ goto tail;
+ }
link = td->link;
} while (tmp != head);
@@ -416,11 +457,14 @@ check_link:
if (!j) {
out += sprintf(out,
"- Frame %d -> (%08x)\n",
- i, le32_to_cpu(link));
+ i, hc32_to_cpu(uhci, link));
j = 1;
}
- out += sprintf(out, " link does not match "
- "QH (%08x)!\n", le32_to_cpu(qh_dma));
+ out += sprintf(out,
+ " link does not match QH (%08x)!\n",
+ hc32_to_cpu(uhci, qh_dma));
+ if (out - buf > len)
+ goto done;
} else
++nerrs;
}
@@ -431,21 +475,30 @@ check_link:
out += sprintf(out, "Skeleton QHs\n");
+ if (out - buf > len)
+ goto done;
+
fsbr_link = 0;
for (i = 0; i < UHCI_NUM_SKELQH; ++i) {
int cnt = 0;
qh = uhci->skelqh[i];
- out += sprintf(out, "- skel_%s_qh\n", qh_names[i]); \
+ out += sprintf(out, "- skel_%s_qh\n", qh_names[i]);
out += uhci_show_qh(uhci, qh, out, len - (out - buf), 4);
+ if (out - buf > len)
+ goto tail;
/* Last QH is the Terminating QH, it's different */
if (i == SKEL_TERM) {
- if (qh_element(qh) != LINK_TO_TD(uhci->term_td))
- out += sprintf(out, " skel_term_qh element is not set to term_td!\n");
+ if (qh_element(qh) != LINK_TO_TD(uhci, uhci->term_td)) {
+ out += sprintf(out,
+ " skel_term_qh element is not set to term_td!\n");
+ if (out - buf > len)
+ goto done;
+ }
link = fsbr_link;
if (!link)
- link = LINK_TO_QH(uhci->skel_term_qh);
+ link = LINK_TO_QH(uhci, uhci->skel_term_qh);
goto check_qh_link;
}
@@ -455,29 +508,40 @@ check_link:
while (tmp != head) {
qh = list_entry(tmp, struct uhci_qh, node);
tmp = tmp->next;
- if (++cnt <= 10)
+ if (++cnt <= 10) {
out += uhci_show_qh(uhci, qh, out,
len - (out - buf), 4);
+ if (out - buf > len)
+ goto tail;
+ }
if (!fsbr_link && qh->skel >= SKEL_FSBR)
- fsbr_link = LINK_TO_QH(qh);
+ fsbr_link = LINK_TO_QH(uhci, qh);
}
if ((cnt -= 10) > 0)
out += sprintf(out, " Skipped %d QHs\n", cnt);
- link = UHCI_PTR_TERM;
+ link = UHCI_PTR_TERM(uhci);
if (i <= SKEL_ISO)
;
else if (i < SKEL_ASYNC)
- link = LINK_TO_QH(uhci->skel_async_qh);
+ link = LINK_TO_QH(uhci, uhci->skel_async_qh);
else if (!uhci->fsbr_is_on)
;
else
- link = LINK_TO_QH(uhci->skel_term_qh);
+ link = LINK_TO_QH(uhci, uhci->skel_term_qh);
check_qh_link:
if (qh->link != link)
- out += sprintf(out, " last QH not linked to next skeleton!\n");
+ out += sprintf(out,
+ " last QH not linked to next skeleton!\n");
+
+ if (out - buf > len)
+ goto done;
}
+done:
+ if (out - buf > len)
+ out += sprintf(out, " ...\n");
+tail:
return out - buf;
}
@@ -494,32 +558,28 @@ 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;
+ return -ENOMEM;
up->data = kmalloc(MAX_OUTPUT, GFP_KERNEL);
if (!up->data) {
kfree(up);
- goto out;
+ return -ENOMEM;
}
up->size = 0;
spin_lock_irqsave(&uhci->lock, flags);
if (uhci->is_initialized)
- up->size = uhci_sprint_schedule(uhci, up->data, MAX_OUTPUT);
+ up->size = uhci_sprint_schedule(uhci, up->data,
+ MAX_OUTPUT - EXTRA_SPACE);
spin_unlock_irqrestore(&uhci->lock, flags);
file->private_data = up;
- ret = 0;
-out:
- unlock_kernel();
- return ret;
+ return 0;
}
static loff_t uhci_debug_lseek(struct file *file, loff_t off, int whence)
@@ -527,9 +587,11 @@ 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;
+ /*
+ * XXX: atomic 64bit seek access, but that needs to be fixed in the VFS
+ */
switch (whence) {
case 0:
new = off;
@@ -538,11 +600,10 @@ static loff_t uhci_debug_lseek(struct file *file, loff_t off, int whence)
new = file->f_pos + off;
break;
}
- if (new < 0 || new > up->size) {
- unlock_kernel();
+
+ if (new < 0 || new > up->size)
return -EINVAL;
- }
- unlock_kernel();
+
return (file->f_pos = new);
}
@@ -563,7 +624,6 @@ static int uhci_debug_release(struct inode *inode, struct file *file)
return 0;
}
-#undef uhci_debug_operations
static const struct file_operations uhci_debug_operations = {
.owner = THIS_MODULE,
.open = uhci_debug_open,
@@ -571,10 +631,11 @@ static const struct file_operations uhci_debug_operations = {
.read = uhci_debug_read,
.release = uhci_debug_release,
};
+#define UHCI_DEBUG_OPS
#endif /* CONFIG_DEBUG_FS */
-#else /* DEBUG */
+#else /* CONFIG_DYNAMIC_DEBUG*/
static inline void lprintk(char *buf)
{}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 06:47:33 +0000