WebSVN - shark - Blame - Rev 846 - /shark/branches/xen/drivers/usb/host/uhci-debug.c

Rev	Author	Line No.	Line
846	giacomo	1	/*
		2	* UHCI-specific debugging code. Invaluable when something
		3	* goes wrong, but don't get in my face.
		4	*
		5	* Kernel visible pointers are surrounded in []'s and bus
		6	* visible pointers are surrounded in ()'s
		7	*
		8	* (C) Copyright 1999 Linus Torvalds
		9	* (C) Copyright 1999-2001 Johannes Erdfelt
		10	*/
		11
		12	#include <linuxcomp.h>
		13
		14	#include <linux/config.h>
		15	#include <linux/kernel.h>
		16	#include <linux/proc_fs.h>
		17	#include <linux/smp_lock.h>
		18	#include <asm/io.h>
		19
		20	#include "uhci-hcd.h"
		21
		22	/* Handle REALLY large printk's so we don't overflow buffers */
		23	static inline void lprintk(char *buf)
		24	{
		25	char *p;
		26
		27	/* Just write one line at a time */
		28	while (buf) {
		29	p = strchr(buf, '\n');
		30	if (p)
		31	*p = 0;
		32	printk("%s\n", buf);
		33	buf = p;
		34	if (buf)
		35	buf++;
		36	}
		37	}
		38
		39	static inline int uhci_is_skeleton_qh(struct uhci_hcd uhci, struct uhci_qh qh)
		40	{
		41	int i;
		42
		43	for (i = 0; i < UHCI_NUM_SKELQH; i++)
		44	if (qh == uhci->skelqh[i])
		45	return 1;
		46
		47	return 0;
		48	}
		49
		50	static int uhci_show_td(struct uhci_td td, char buf, int len, int space)
		51	{
		52	char *out = buf;
		53	char *spid;
		54	u32 status, token;
		55
		56	/* Try to make sure there's enough memory */
		57	if (len < 160)
		58	return 0;
		59
		60	status = td_status(td);
		61	out += sprintf26(out, "%*s[%p] link (%08x) ", space, "", td, le32_to_cpu(td->link));
		62	out += sprintf26(out, "e%d %s%s%s%s%s%s%s%s%s%sLength=%x ",
		63	((status >> 27) & 3),
		64	(status & TD_CTRL_SPD) ? "SPD " : "",
		65	(status & TD_CTRL_LS) ? "LS " : "",
		66	(status & TD_CTRL_IOC) ? "IOC " : "",
		67	(status & TD_CTRL_ACTIVE) ? "Active " : "",
		68	(status & TD_CTRL_STALLED) ? "Stalled " : "",
		69	(status & TD_CTRL_DBUFERR) ? "DataBufErr " : "",
		70	(status & TD_CTRL_BABBLE) ? "Babble " : "",
		71	(status & TD_CTRL_NAK) ? "NAK " : "",
		72	(status & TD_CTRL_CRCTIMEO) ? "CRC/Timeo " : "",
		73	(status & TD_CTRL_BITSTUFF) ? "BitStuff " : "",
		74	status & 0x7ff);
		75
		76	token = td_token(td);
		77	switch (uhci_packetid(token)) {
		78	case USB_PID_SETUP:
		79	spid = "SETUP";
		80	break;
		81	case USB_PID_OUT:
		82	spid = "OUT";
		83	break;
		84	case USB_PID_IN:
		85	spid = "IN";
		86	break;
		87	default:
		88	spid = "?";
		89	break;
		90	}
		91
		92	out += sprintf26(out, "MaxLen=%x DT%d EndPt=%x Dev=%x, PID=%x(%s) ",
		93	token >> 21,
		94	((token >> 19) & 1),
		95	(token >> 15) & 15,
		96	(token >> 8) & 127,
		97	(token & 0xff),
		98	spid);
		99	out += sprintf26(out, "(buf=%08x)\n", le32_to_cpu(td->buffer));
		100
		101	return out - buf;
		102	}
		103
		104	static int uhci_show_qh(struct uhci_qh qh, char buf, int len, int space)
		105	{
		106	char *out = buf;
		107	struct urb_priv *urbp;
		108	struct list_head head, tmp;
		109	struct uhci_td *td;
		110	int i = 0, checked = 0, prevactive = 0;
		111
		112	/* Try to make sure there's enough memory */
		113	if (len < 80 * 6)
		114	return 0;
		115
		116	out += sprintf26(out, "%*s[%p] link (%08x) element (%08x)\n", space, "",
		117	qh, le32_to_cpu(qh->link), le32_to_cpu(qh->element));
		118
		119	if (qh->element & UHCI_PTR_QH)
		120	out += sprintf26(out, "%*s Element points to QH (bug?)\n", space, "");
		121
		122	if (qh->element & UHCI_PTR_DEPTH)
		123	out += sprintf26(out, "%*s Depth traverse\n", space, "");
		124
		125	if (qh->element & cpu_to_le32(8))
		126	out += sprintf26(out, "%*s Bit 3 set (bug?)\n", space, "");
		127
		128	if (!(qh->element & ~(UHCI_PTR_QH \| UHCI_PTR_DEPTH)))
		129	out += sprintf26(out, "%*s Element is NULL (bug?)\n", space, "");
		130
		131	if (!qh->urbp) {
		132	out += sprintf26(out, "%*s urbp == NULL\n", space, "");
		133	goto out;
		134	}
		135
		136	urbp = qh->urbp;
		137
		138	head = &urbp->td_list;
		139	tmp = head->next;
		140
		141	td = list_entry(tmp, struct uhci_td, list);
		142
		143	if (cpu_to_le32(td->dma_handle) != (qh->element & ~UHCI_PTR_BITS))
		144	out += sprintf26(out, "%*s Element != First TD\n", space, "");
		145
		146	while (tmp != head) {
		147	struct uhci_td *td = list_entry(tmp, struct uhci_td, list);
		148
		149	tmp = tmp->next;
		150
		151	out += sprintf26(out, "%*s%d: ", space + 2, "", i++);
		152	out += uhci_show_td(td, out, len - (out - buf), 0);
		153
		154	if (i > 10 && !checked && prevactive && tmp != head &&
		155	debug <= 2) {
		156	struct list_head *ntmp = tmp;
		157	struct uhci_td *ntd = td;
		158	int active = 1, ni = i;
		159
		160	checked = 1;
		161
		162	while (ntmp != head && ntmp->next != head && active) {
		163	ntd = list_entry(ntmp, struct uhci_td, list);
		164
		165	ntmp = ntmp->next;
		166
		167	active = td_status(ntd) & TD_CTRL_ACTIVE;
		168
		169	ni++;
		170	}
		171
		172	if (active && ni > i) {
		173	out += sprintf26(out, "%*s[skipped %d active TD's]\n", space, "", ni - i);
		174	tmp = ntmp;
		175	td = ntd;
		176	i = ni;
		177	}
		178	}
		179
		180	prevactive = td_status(td) & TD_CTRL_ACTIVE;
		181	}
		182
		183	if (list_empty(&urbp->queue_list) \|\| urbp->queued)
		184	goto out;
		185
		186	out += sprintf26(out, "%*sQueued QH's:\n", -space, "--");
		187
		188	head = &urbp->queue_list;
		189	tmp = head->next;
		190
		191	while (tmp != head) {
		192	struct urb_priv *nurbp = list_entry(tmp, struct urb_priv,
		193	queue_list);
		194	tmp = tmp->next;
		195
		196	out += uhci_show_qh(nurbp->qh, out, len - (out - buf), space);
		197	}
		198
		199	out:
		200	return out - buf;
		201	}
		202
		203	#define show_frame_num() \
		204	if (!shown) { \
		205	shown = 1; \
		206	out += sprintf26(out, "- Frame %d\n", i); \
		207	}
		208
		209	#ifdef CONFIG_PROC_FS
		210	static const char *qh_names[] = {
		211	"skel_int128_qh", "skel_int64_qh",
		212	"skel_int32_qh", "skel_int16_qh",
		213	"skel_int8_qh", "skel_int4_qh",
		214	"skel_int2_qh", "skel_int1_qh",
		215	"skel_ls_control_qh", "skel_hs_control_qh",
		216	"skel_bulk_qh", "skel_term_qh"
		217	};
		218
		219	#define show_qh_name() \
		220	if (!shown) { \
		221	shown = 1; \
		222	out += sprintf26(out, "- %s\n", qh_names[i]); \
		223	}
		224
		225	static int uhci_show_sc(int port, unsigned short status, char *buf, int len)
		226	{
		227	char *out = buf;
		228
		229	/* Try to make sure there's enough memory */
		230	if (len < 80)
		231	return 0;
		232
		233	out += sprintf26(out, " stat%d = %04x %s%s%s%s%s%s%s%s\n",
		234	port,
		235	status,
		236	(status & USBPORTSC_SUSP) ? "PortSuspend " : "",
		237	(status & USBPORTSC_PR) ? "PortReset " : "",
		238	(status & USBPORTSC_LSDA) ? "LowSpeed " : "",
		239	(status & USBPORTSC_RD) ? "ResumeDetect " : "",
		240	(status & USBPORTSC_PEC) ? "EnableChange " : "",
		241	(status & USBPORTSC_PE) ? "PortEnabled " : "",
		242	(status & USBPORTSC_CSC) ? "ConnectChange " : "",
		243	(status & USBPORTSC_CCS) ? "PortConnected " : "");
		244
		245	return out - buf;
		246	}
		247
		248	static int uhci_show_status(struct uhci_hcd uhci, char buf, int len)
		249	{
		250	char *out = buf;
		251	unsigned int io_addr = uhci->io_addr;
		252	unsigned short usbcmd, usbstat, usbint, usbfrnum;
		253	unsigned int flbaseadd;
		254	unsigned char sof;
		255	unsigned short portsc1, portsc2;
		256
		257	/* Try to make sure there's enough memory */
		258	if (len < 80 * 6)
		259	return 0;
		260
		261	usbcmd = inw(io_addr + 0);
		262	usbstat = inw(io_addr + 2);
		263	usbint = inw(io_addr + 4);
		264	usbfrnum = inw(io_addr + 6);
		265	flbaseadd = inl(io_addr + 8);
		266	sof = inb(io_addr + 12);
		267	portsc1 = inw(io_addr + 16);
		268	portsc2 = inw(io_addr + 18);
		269
		270	out += sprintf26(out, " usbcmd = %04x %s%s%s%s%s%s%s%s\n",
		271	usbcmd,
		272	(usbcmd & USBCMD_MAXP) ? "Maxp64 " : "Maxp32 ",
		273	(usbcmd & USBCMD_CF) ? "CF " : "",
		274	(usbcmd & USBCMD_SWDBG) ? "SWDBG " : "",
		275	(usbcmd & USBCMD_FGR) ? "FGR " : "",
		276	(usbcmd & USBCMD_EGSM) ? "EGSM " : "",
		277	(usbcmd & USBCMD_GRESET) ? "GRESET " : "",
		278	(usbcmd & USBCMD_HCRESET) ? "HCRESET " : "",
		279	(usbcmd & USBCMD_RS) ? "RS " : "");
		280
		281	out += sprintf26(out, " usbstat = %04x %s%s%s%s%s%s\n",
		282	usbstat,
		283	(usbstat & USBSTS_HCH) ? "HCHalted " : "",
		284	(usbstat & USBSTS_HCPE) ? "HostControllerProcessError " : "",
		285	(usbstat & USBSTS_HSE) ? "HostSystemError " : "",
		286	(usbstat & USBSTS_RD) ? "ResumeDetect " : "",
		287	(usbstat & USBSTS_ERROR) ? "USBError " : "",
		288	(usbstat & USBSTS_USBINT) ? "USBINT " : "");
		289
		290	out += sprintf26(out, " usbint = %04x\n", usbint);
		291	out += sprintf26(out, " usbfrnum = (%d)%03x\n", (usbfrnum >> 10) & 1,
		292	0xfff & (4*(unsigned int)usbfrnum));
		293	out += sprintf26(out, " flbaseadd = %08x\n", flbaseadd);
		294	out += sprintf26(out, " sof = %02x\n", sof);
		295	out += uhci_show_sc(1, portsc1, out, len - (out - buf));
		296	out += uhci_show_sc(2, portsc2, out, len - (out - buf));
		297
		298	return out - buf;
		299	}
		300
		301	static int uhci_show_urbp(struct uhci_hcd uhci, struct urb_priv urbp, char *buf, int len)
		302	{
		303	struct list_head *tmp;
		304	char *out = buf;
		305	int count = 0;
		306
		307	if (len < 200)
		308	return 0;
		309
		310	out += sprintf26(out, "urb_priv [%p] ", urbp);
		311	out += sprintf26(out, "urb [%p] ", urbp->urb);
		312	out += sprintf26(out, "qh [%p] ", urbp->qh);
		313	out += sprintf26(out, "Dev=%d ", usb_pipedevice(urbp->urb->pipe));
		314	out += sprintf26(out, "EP=%x(%s) ", usb_pipeendpoint(urbp->urb->pipe), (usb_pipein(urbp->urb->pipe) ? "IN" : "OUT"));
		315
		316	switch (usb_pipetype(urbp->urb->pipe)) {
		317	case PIPE_ISOCHRONOUS: out += sprintf26(out, "ISO "); break;
		318	case PIPE_INTERRUPT: out += sprintf26(out, "INT "); break;
		319	case PIPE_BULK: out += sprintf26(out, "BLK "); break;
		320	case PIPE_CONTROL: out += sprintf26(out, "CTL "); break;
		321	}
		322
		323	out += sprintf26(out, "%s", (urbp->fsbr ? "FSBR " : ""));
		324	out += sprintf26(out, "%s", (urbp->fsbr_timeout ? "FSBR_TO " : ""));
		325
		326	if (urbp->status != -EINPROGRESS)
		327	out += sprintf26(out, "Status=%d ", urbp->status);
		328	//out += sprintf26(out, "Inserttime=%lx ",urbp->inserttime);
		329	//out += sprintf26(out, "FSBRtime=%lx ",urbp->fsbrtime);
		330
		331	spin_lock(&urbp->urb->lock);
		332	count = 0;
		333	list_for_each(tmp, &urbp->td_list)
		334	count++;
		335	spin_unlock(&urbp->urb->lock);
		336	out += sprintf26(out, "TDs=%d ",count);
		337
		338	if (urbp->queued)
		339	out += sprintf26(out, "queued\n");
		340	else {
		341	spin_lock(&uhci->frame_list_lock);
		342	count = 0;
		343	list_for_each(tmp, &urbp->queue_list)
		344	count++;
		345	spin_unlock(&uhci->frame_list_lock);
		346	out += sprintf26(out, "queued URBs=%d\n", count);
		347	}
		348
		349	return out - buf;
		350	}
		351
		352	static int uhci_show_lists(struct uhci_hcd uhci, char buf, int len)
		353	{
		354	char *out = buf;
		355	unsigned long flags;
		356	struct list_head head, tmp;
		357	int count;
		358
		359	out += sprintf26(out, "Main list URBs:");
		360	spin_lock_irqsave(&uhci->urb_list_lock, flags);
		361	if (list_empty(&uhci->urb_list))
		362	out += sprintf26(out, " Empty\n");
		363	else {
		364	out += sprintf26(out, "\n");
		365	count = 0;
		366	head = &uhci->urb_list;
		367	tmp = head->next;
		368	while (tmp != head) {
		369	struct urb_priv *urbp = list_entry(tmp, struct urb_priv, urb_list);
		370
		371	out += sprintf26(out, " %d: ", ++count);
		372	out += uhci_show_urbp(uhci, urbp, out, len - (out - buf));
		373	tmp = tmp->next;
		374	}
		375	}
		376	spin_unlock_irqrestore(&uhci->urb_list_lock, flags);
		377
		378	out += sprintf26(out, "Remove list URBs:");
		379	spin_lock_irqsave(&uhci->urb_remove_list_lock, flags);
		380	if (list_empty(&uhci->urb_remove_list))
		381	out += sprintf26(out, " Empty\n");
		382	else {
		383	out += sprintf26(out, "\n");
		384	count = 0;
		385	head = &uhci->urb_remove_list;
		386	tmp = head->next;
		387	while (tmp != head) {
		388	struct urb_priv *urbp = list_entry(tmp, struct urb_priv, urb_list);
		389
		390	out += sprintf26(out, " %d: ", ++count);
		391	out += uhci_show_urbp(uhci, urbp, out, len - (out - buf));
		392	tmp = tmp->next;
		393	}
		394	}
		395	spin_unlock_irqrestore(&uhci->urb_remove_list_lock, flags);
		396
		397	out += sprintf26(out, "Complete list URBs:");
		398	spin_lock_irqsave(&uhci->complete_list_lock, flags);
		399	if (list_empty(&uhci->complete_list))
		400	out += sprintf26(out, " Empty\n");
		401	else {
		402	out += sprintf26(out, "\n");
		403	count = 0;
		404	head = &uhci->complete_list;
		405	tmp = head->next;
		406	while (tmp != head) {
		407	struct urb_priv *urbp = list_entry(tmp, struct urb_priv, complete_list);
		408
		409	out += sprintf26(out, " %d: ", ++count);
		410	out += uhci_show_urbp(uhci, urbp, out, len - (out - buf));
		411	tmp = tmp->next;
		412	}
		413	}
		414	spin_unlock_irqrestore(&uhci->complete_list_lock, flags);
		415
		416	return out - buf;
		417	}
		418
		419	static int uhci_sprint_schedule(struct uhci_hcd uhci, char buf, int len)
		420	{
		421	unsigned long flags;
		422	char *out = buf;
		423	int i;
		424	struct uhci_qh *qh;
		425	struct uhci_td *td;
		426	struct list_head tmp, head;
		427
		428	spin_lock_irqsave(&uhci->frame_list_lock, flags);
		429
		430	out += sprintf26(out, "HC status\n");
		431	out += uhci_show_status(uhci, out, len - (out - buf));
		432
		433	out += sprintf26(out, "Frame List\n");
		434	for (i = 0; i < UHCI_NUMFRAMES; ++i) {
		435	int shown = 0;
		436	td = uhci->fl->frame_cpu[i];
		437	if (!td)
		438	continue;
		439
		440	if (td->dma_handle != (dma_addr_t)uhci->fl->frame[i]) {
		441	show_frame_num();
		442	out += sprintf26(out, " frame list does not match td->dma_handle!\n");
		443	}
		444	show_frame_num();
		445
		446	head = &td->fl_list;
		447	tmp = head;
		448	do {
		449	td = list_entry(tmp, struct uhci_td, fl_list);
		450	tmp = tmp->next;
		451	out += uhci_show_td(td, out, len - (out - buf), 4);
		452	} while (tmp != head);
		453	}
		454
		455	out += sprintf26(out, "Skeleton QH's\n");
		456
		457	for (i = 0; i < UHCI_NUM_SKELQH; ++i) {
		458	int shown = 0;
		459
		460	qh = uhci->skelqh[i];
		461
		462	if (debug > 1) {
		463	show_qh_name();
		464	out += uhci_show_qh(qh, out, len - (out - buf), 4);
		465	}
		466
		467	/* Last QH is the Terminating QH, it's different */
		468	if (i == UHCI_NUM_SKELQH - 1) {
		469	if (qh->link != UHCI_PTR_TERM)
		470	out += sprintf26(out, " bandwidth reclamation on!\n");
		471
		472	if (qh->element != cpu_to_le32(uhci->term_td->dma_handle))
		473	out += sprintf26(out, " skel_term_qh element is not set to term_td!\n");
		474
		475	continue;
		476	}
		477
		478	if (list_empty(&qh->list)) {
		479	if (i < UHCI_NUM_SKELQH - 1) {
		480	if (qh->link !=
		481	(cpu_to_le32(uhci->skelqh[i + 1]->dma_handle) \| UHCI_PTR_QH)) {
		482	show_qh_name();
		483	out += sprintf26(out, " skeleton QH not linked to next skeleton QH!\n");
		484	}
		485	}
		486
		487	continue;
		488	}
		489
		490	show_qh_name();
		491
		492	head = &qh->list;
		493	tmp = head->next;
		494
		495	while (tmp != head) {
		496	qh = list_entry(tmp, struct uhci_qh, list);
		497
		498	tmp = tmp->next;
		499
		500	out += uhci_show_qh(qh, out, len - (out - buf), 4);
		501	}
		502
		503	if (i < UHCI_NUM_SKELQH - 1) {
		504	if (qh->link !=
		505	(cpu_to_le32(uhci->skelqh[i + 1]->dma_handle) \| UHCI_PTR_QH))
		506	out += sprintf26(out, " last QH not linked to next skeleton!\n");
		507	}
		508	}
		509
		510	spin_unlock_irqrestore(&uhci->frame_list_lock, flags);
		511
		512	if (debug > 2)
		513	out += uhci_show_lists(uhci, out, len - (out - buf));
		514
		515	return out - buf;
		516	}
		517
		518	#define MAX_OUTPUT (64 * 1024)
		519
		520	static struct proc_dir_entry *uhci_proc_root = NULL;
		521
		522	struct uhci_proc {
		523	int size;
		524	char *data;
		525	struct uhci_hcd *uhci;
		526	};
		527
		528	static int uhci_proc_open(struct inode inode, struct file file)
		529	{
		530	const struct proc_dir_entry *dp = PDE(inode);
		531	struct uhci_hcd *uhci = dp->data;
		532	struct uhci_proc *up;
		533	int ret = -ENOMEM;
		534
		535	lock_kernel();
		536	up = kmalloc(sizeof(*up), GFP_KERNEL);
		537	if (!up)
		538	goto out;
		539
		540	up->data = kmalloc(MAX_OUTPUT, GFP_KERNEL);
		541	if (!up->data) {
		542	kfree(up);
		543	goto out;
		544	}
		545
		546	up->size = uhci_sprint_schedule(uhci, up->data, MAX_OUTPUT);
		547
		548	file->private_data = up;
		549
		550	ret = 0;
		551	out:
		552	unlock_kernel();
		553	return ret;
		554	}
		555
		556	static loff_t uhci_proc_lseek(struct file *file, loff_t off, int whence)
		557	{
		558	struct uhci_proc *up;
		559	loff_t new = -1;
		560
		561	lock_kernel();
		562	up = file->private_data;
		563
		564	switch (whence) {
		565	case 0:
		566	new = off;
		567	break;
		568	case 1:
		569	new = file->f_pos + off;
		570	break;
		571	}
		572	if (new < 0 \|\| new > up->size) {
		573	unlock_kernel();
		574	return -EINVAL;
		575	}
		576	unlock_kernel();
		577	return (file->f_pos = new);
		578	}
		579
		580	static ssize_t uhci_proc_read(struct file file, char buf, size_t nbytes,
		581	loff_t *ppos)
		582	{
		583	struct uhci_proc *up = file->private_data;
		584	unsigned int pos;
		585	unsigned int size;
		586
		587	pos = *ppos;
		588	size = up->size;
		589	if (pos >= size)
		590	return 0;
		591	if (nbytes >= size)
		592	nbytes = size;
		593	if (pos + nbytes > size)
		594	nbytes = size - pos;
		595
		596	if (!access_ok(VERIFY_WRITE, buf, nbytes))
		597	return -EINVAL;
		598
		599	if (copy_to_user(buf, up->data + pos, nbytes))
		600	return -EFAULT;
		601
		602	*ppos += nbytes;
		603
		604	return nbytes;
		605	}
		606
		607	static int uhci_proc_release(struct inode inode, struct file file)
		608	{
		609	struct uhci_proc *up = file->private_data;
		610
		611	kfree(up->data);
		612	kfree(up);
		613
		614	return 0;
		615	}
		616
		617	static struct file_operations uhci_proc_operations = {
		618	.open = uhci_proc_open,
		619	.llseek = uhci_proc_lseek,
		620	.read = uhci_proc_read,
		621	// write: uhci_proc_write,
		622	.release = uhci_proc_release,
		623	};
		624	#endif
		625

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(root)/shark/branches/xen/drivers/usb/host/uhci-debug.c @ 1680 - Rev 846