From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- drivers/usb/host/uhci-debug.c | 587 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 587 insertions(+) create mode 100644 drivers/usb/host/uhci-debug.c (limited to 'drivers/usb/host/uhci-debug.c') diff --git a/drivers/usb/host/uhci-debug.c b/drivers/usb/host/uhci-debug.c new file mode 100644 index 000000000000..24c73c5a3435 --- /dev/null +++ b/drivers/usb/host/uhci-debug.c @@ -0,0 +1,587 @@ +/* + * 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 + * + * (C) Copyright 1999 Linus Torvalds + * (C) Copyright 1999-2001 Johannes Erdfelt + */ + +#include +#include +#include +#include +#include + +#include "uhci-hcd.h" + +static struct dentry *uhci_debugfs_root = NULL; + +/* Handle REALLY large printk's so we don't overflow buffers */ +static inline void lprintk(char *buf) +{ + char *p; + + /* Just write one line at a time */ + while (buf) { + p = strchr(buf, '\n'); + if (p) + *p = 0; + printk(KERN_DEBUG "%s\n", buf); + buf = p; + if (buf) + buf++; + } +} + +static int uhci_show_td(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)); + out += sprintf(out, "e%d %s%s%s%s%s%s%s%s%s%sLength=%x ", + ((status >> 27) & 3), + (status & TD_CTRL_SPD) ? "SPD " : "", + (status & TD_CTRL_LS) ? "LS " : "", + (status & TD_CTRL_IOC) ? "IOC " : "", + (status & TD_CTRL_ACTIVE) ? "Active " : "", + (status & TD_CTRL_STALLED) ? "Stalled " : "", + (status & TD_CTRL_DBUFERR) ? "DataBufErr " : "", + (status & TD_CTRL_BABBLE) ? "Babble " : "", + (status & TD_CTRL_NAK) ? "NAK " : "", + (status & TD_CTRL_CRCTIMEO) ? "CRC/Timeo " : "", + (status & TD_CTRL_BITSTUFF) ? "BitStuff " : "", + status & 0x7ff); + + token = td_token(td); + switch (uhci_packetid(token)) { + case USB_PID_SETUP: + spid = "SETUP"; + break; + case USB_PID_OUT: + spid = "OUT"; + break; + case USB_PID_IN: + spid = "IN"; + break; + default: + spid = "?"; + break; + } + + out += sprintf(out, "MaxLen=%x DT%d EndPt=%x Dev=%x, PID=%x(%s) ", + token >> 21, + ((token >> 19) & 1), + (token >> 15) & 15, + (token >> 8) & 127, + (token & 0xff), + spid); + out += sprintf(out, "(buf=%08x)\n", le32_to_cpu(td->buffer)); + + return out - buf; +} + +static int uhci_show_qh(struct uhci_qh *qh, 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; + __le32 element = qh_element(qh); + + /* Try to make sure there's enough memory */ + if (len < 80 * 6) + return 0; + + out += sprintf(out, "%*s[%p] link (%08x) element (%08x)\n", space, "", + qh, le32_to_cpu(qh->link), le32_to_cpu(element)); + + if (element & UHCI_PTR_QH) + out += sprintf(out, "%*s Element points to QH (bug?)\n", space, ""); + + if (element & UHCI_PTR_DEPTH) + out += sprintf(out, "%*s Depth traverse\n", space, ""); + + if (element & cpu_to_le32(8)) + out += sprintf(out, "%*s Bit 3 set (bug?)\n", space, ""); + + 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; + } + } + + prevactive = td_status(td) & TD_CTRL_ACTIVE; + } + + 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); + } + +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[] = { + "skel_int128_qh", "skel_int64_qh", + "skel_int32_qh", "skel_int16_qh", + "skel_int8_qh", "skel_int4_qh", + "skel_int2_qh", "skel_int1_qh", + "skel_ls_control_qh", "skel_fs_control_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; + + /* 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", + port, + status, + (status & USBPORTSC_SUSP) ? " Suspend" : "", + (status & USBPORTSC_OCC) ? " OverCurrentChange" : "", + (status & USBPORTSC_OC) ? " OverCurrent" : "", + (status & USBPORTSC_PR) ? " Reset" : "", + (status & USBPORTSC_LSDA) ? " LowSpeed" : "", + (status & USBPORTSC_RD) ? " ResumeDetect" : "", + (status & USBPORTSC_PEC) ? " EnableChange" : "", + (status & USBPORTSC_PE) ? " Enabled" : "", + (status & USBPORTSC_CSC) ? " ConnectChange" : "", + (status & USBPORTSC_CCS) ? " Connected" : ""); + + 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 * 6) + 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); + + out += sprintf(out, " usbcmd = %04x %s%s%s%s%s%s%s%s\n", + usbcmd, + (usbcmd & USBCMD_MAXP) ? "Maxp64 " : "Maxp32 ", + (usbcmd & USBCMD_CF) ? "CF " : "", + (usbcmd & USBCMD_SWDBG) ? "SWDBG " : "", + (usbcmd & USBCMD_FGR) ? "FGR " : "", + (usbcmd & USBCMD_EGSM) ? "EGSM " : "", + (usbcmd & USBCMD_GRESET) ? "GRESET " : "", + (usbcmd & USBCMD_HCRESET) ? "HCRESET " : "", + (usbcmd & USBCMD_RS) ? "RS " : ""); + + out += sprintf(out, " usbstat = %04x %s%s%s%s%s%s\n", + usbstat, + (usbstat & USBSTS_HCH) ? "HCHalted " : "", + (usbstat & USBSTS_HCPE) ? "HostControllerProcessError " : "", + (usbstat & USBSTS_HSE) ? "HostSystemError " : "", + (usbstat & USBSTS_RD) ? "ResumeDetect " : "", + (usbstat & USBSTS_ERROR) ? "USBError " : "", + (usbstat & USBSTS_USBINT) ? "USBINT " : ""); + + 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)); + + 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 += sprintf(out, "HC status\n"); + out += uhci_show_status(uhci, out, len - (out - buf)); + + out += sprintf(out, "Frame List\n"); + for (i = 0; i < UHCI_NUMFRAMES; ++i) { + int shown = 0; + td = uhci->fl->frame_cpu[i]; + if (!td) + continue; + + if (td->dma_handle != (dma_addr_t)uhci->fl->frame[i]) { + show_frame_num(); + out += sprintf(out, " frame list does not match td->dma_handle!\n"); + } + show_frame_num(); + + head = &td->fl_list; + tmp = head; + do { + td = list_entry(tmp, struct uhci_td, fl_list); + tmp = tmp->next; + out += uhci_show_td(td, out, len - (out - buf), 4); + } while (tmp != head); + } + + out += sprintf(out, "Skeleton QH's\n"); + + for (i = 0; i < UHCI_NUM_SKELQH; ++i) { + int shown = 0; + + qh = uhci->skelqh[i]; + + if (debug > 1) { + show_qh_name(); + 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) { + if (qh->link != UHCI_PTR_TERM) + out += sprintf(out, " bandwidth reclamation on!\n"); + + if (qh_element(qh) != cpu_to_le32(uhci->term_td->dma_handle)) + out += sprintf(out, " skel_term_qh element is not set to term_td!\n"); + + 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; + tmp = head->next; + + while (tmp != head) { + qh = list_entry(tmp, struct uhci_qh, list); + + tmp = tmp->next; + + out += uhci_show_qh(qh, out, len - (out - buf), 4); + } + + if (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; +} + +#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; + + 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 = uhci_sprint_schedule(uhci, up->data, MAX_OUTPUT); + + 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; +} + +static struct file_operations uhci_debug_operations = { + .open = uhci_debug_open, + .llseek = uhci_debug_lseek, + .read = uhci_debug_read, + .release = uhci_debug_release, +}; + +#else /* CONFIG_DEBUG_FS */ + +#define uhci_debug_operations (* (struct file_operations *) NULL) + +#endif -- cgit v1.2.3