11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * UHCI-specific debugging code. Invaluable when something 31da177e4SLinus Torvalds * goes wrong, but don't get in my face. 41da177e4SLinus Torvalds * 5687f5f34SAlan Stern * Kernel visible pointers are surrounded in []s and bus 6687f5f34SAlan Stern * visible pointers are surrounded in ()s 71da177e4SLinus Torvalds * 81da177e4SLinus Torvalds * (C) Copyright 1999 Linus Torvalds 91da177e4SLinus Torvalds * (C) Copyright 1999-2001 Johannes Erdfelt 101da177e4SLinus Torvalds */ 111da177e4SLinus Torvalds 121da177e4SLinus Torvalds #include <linux/kernel.h> 131da177e4SLinus Torvalds #include <linux/debugfs.h> 141da177e4SLinus Torvalds #include <linux/smp_lock.h> 151da177e4SLinus Torvalds #include <asm/io.h> 161da177e4SLinus Torvalds 171da177e4SLinus Torvalds #include "uhci-hcd.h" 181da177e4SLinus Torvalds 19066202ddSLuiz Fernando N. Capitulino #define uhci_debug_operations (* (const struct file_operations *) NULL) 208d402e1aSAlan Stern static struct dentry *uhci_debugfs_root; 218d402e1aSAlan Stern 228d402e1aSAlan Stern #ifdef DEBUG 231da177e4SLinus Torvalds 24687f5f34SAlan Stern /* Handle REALLY large printks so we don't overflow buffers */ 258d402e1aSAlan Stern static void lprintk(char *buf) 261da177e4SLinus Torvalds { 271da177e4SLinus Torvalds char *p; 281da177e4SLinus Torvalds 291da177e4SLinus Torvalds /* Just write one line at a time */ 301da177e4SLinus Torvalds while (buf) { 311da177e4SLinus Torvalds p = strchr(buf, '\n'); 321da177e4SLinus Torvalds if (p) 331da177e4SLinus Torvalds *p = 0; 341da177e4SLinus Torvalds printk(KERN_DEBUG "%s\n", buf); 351da177e4SLinus Torvalds buf = p; 361da177e4SLinus Torvalds if (buf) 371da177e4SLinus Torvalds buf++; 381da177e4SLinus Torvalds } 391da177e4SLinus Torvalds } 401da177e4SLinus Torvalds 411da177e4SLinus Torvalds static int uhci_show_td(struct uhci_td *td, char *buf, int len, int space) 421da177e4SLinus Torvalds { 431da177e4SLinus Torvalds char *out = buf; 441da177e4SLinus Torvalds char *spid; 451da177e4SLinus Torvalds u32 status, token; 461da177e4SLinus Torvalds 471da177e4SLinus Torvalds /* Try to make sure there's enough memory */ 481da177e4SLinus Torvalds if (len < 160) 491da177e4SLinus Torvalds return 0; 501da177e4SLinus Torvalds 511da177e4SLinus Torvalds status = td_status(td); 521da177e4SLinus Torvalds out += sprintf(out, "%*s[%p] link (%08x) ", space, "", td, le32_to_cpu(td->link)); 531da177e4SLinus Torvalds out += sprintf(out, "e%d %s%s%s%s%s%s%s%s%s%sLength=%x ", 541da177e4SLinus Torvalds ((status >> 27) & 3), 551da177e4SLinus Torvalds (status & TD_CTRL_SPD) ? "SPD " : "", 561da177e4SLinus Torvalds (status & TD_CTRL_LS) ? "LS " : "", 571da177e4SLinus Torvalds (status & TD_CTRL_IOC) ? "IOC " : "", 581da177e4SLinus Torvalds (status & TD_CTRL_ACTIVE) ? "Active " : "", 591da177e4SLinus Torvalds (status & TD_CTRL_STALLED) ? "Stalled " : "", 601da177e4SLinus Torvalds (status & TD_CTRL_DBUFERR) ? "DataBufErr " : "", 611da177e4SLinus Torvalds (status & TD_CTRL_BABBLE) ? "Babble " : "", 621da177e4SLinus Torvalds (status & TD_CTRL_NAK) ? "NAK " : "", 631da177e4SLinus Torvalds (status & TD_CTRL_CRCTIMEO) ? "CRC/Timeo " : "", 641da177e4SLinus Torvalds (status & TD_CTRL_BITSTUFF) ? "BitStuff " : "", 651da177e4SLinus Torvalds status & 0x7ff); 661da177e4SLinus Torvalds 671da177e4SLinus Torvalds token = td_token(td); 681da177e4SLinus Torvalds switch (uhci_packetid(token)) { 691da177e4SLinus Torvalds case USB_PID_SETUP: 701da177e4SLinus Torvalds spid = "SETUP"; 711da177e4SLinus Torvalds break; 721da177e4SLinus Torvalds case USB_PID_OUT: 731da177e4SLinus Torvalds spid = "OUT"; 741da177e4SLinus Torvalds break; 751da177e4SLinus Torvalds case USB_PID_IN: 761da177e4SLinus Torvalds spid = "IN"; 771da177e4SLinus Torvalds break; 781da177e4SLinus Torvalds default: 791da177e4SLinus Torvalds spid = "?"; 801da177e4SLinus Torvalds break; 811da177e4SLinus Torvalds } 821da177e4SLinus Torvalds 831da177e4SLinus Torvalds out += sprintf(out, "MaxLen=%x DT%d EndPt=%x Dev=%x, PID=%x(%s) ", 841da177e4SLinus Torvalds token >> 21, 851da177e4SLinus Torvalds ((token >> 19) & 1), 861da177e4SLinus Torvalds (token >> 15) & 15, 871da177e4SLinus Torvalds (token >> 8) & 127, 881da177e4SLinus Torvalds (token & 0xff), 891da177e4SLinus Torvalds spid); 901da177e4SLinus Torvalds out += sprintf(out, "(buf=%08x)\n", le32_to_cpu(td->buffer)); 911da177e4SLinus Torvalds 921da177e4SLinus Torvalds return out - buf; 931da177e4SLinus Torvalds } 941da177e4SLinus Torvalds 95dccf4a48SAlan Stern static int uhci_show_urbp(struct urb_priv *urbp, char *buf, int len, int space) 96dccf4a48SAlan Stern { 97dccf4a48SAlan Stern char *out = buf; 98dccf4a48SAlan Stern struct uhci_td *td; 99dccf4a48SAlan Stern int i, nactive, ninactive; 1004de7d2c2SAlan Stern char *ptype; 101dccf4a48SAlan Stern 102dccf4a48SAlan Stern if (len < 200) 103dccf4a48SAlan Stern return 0; 104dccf4a48SAlan Stern 105dccf4a48SAlan Stern out += sprintf(out, "urb_priv [%p] ", urbp); 106dccf4a48SAlan Stern out += sprintf(out, "urb [%p] ", urbp->urb); 107dccf4a48SAlan Stern out += sprintf(out, "qh [%p] ", urbp->qh); 108dccf4a48SAlan Stern out += sprintf(out, "Dev=%d ", usb_pipedevice(urbp->urb->pipe)); 109dccf4a48SAlan Stern out += sprintf(out, "EP=%x(%s) ", usb_pipeendpoint(urbp->urb->pipe), 110dccf4a48SAlan Stern (usb_pipein(urbp->urb->pipe) ? "IN" : "OUT")); 111dccf4a48SAlan Stern 112dccf4a48SAlan Stern switch (usb_pipetype(urbp->urb->pipe)) { 1134de7d2c2SAlan Stern case PIPE_ISOCHRONOUS: ptype = "ISO"; break; 1144de7d2c2SAlan Stern case PIPE_INTERRUPT: ptype = "INT"; break; 1154de7d2c2SAlan Stern case PIPE_BULK: ptype = "BLK"; break; 1164de7d2c2SAlan Stern default: 1174de7d2c2SAlan Stern case PIPE_CONTROL: ptype = "CTL"; break; 118dccf4a48SAlan Stern } 119dccf4a48SAlan Stern 1204de7d2c2SAlan Stern out += sprintf(out, "%s%s", ptype, (urbp->fsbr ? " FSBR" : "")); 12159e29ed9SAlan Stern out += sprintf(out, " Actlen=%d", urbp->urb->actual_length); 122dccf4a48SAlan Stern 123dccf4a48SAlan Stern if (urbp->urb->status != -EINPROGRESS) 124dccf4a48SAlan Stern out += sprintf(out, " Status=%d", urbp->urb->status); 125dccf4a48SAlan Stern out += sprintf(out, "\n"); 126dccf4a48SAlan Stern 127dccf4a48SAlan Stern i = nactive = ninactive = 0; 128dccf4a48SAlan Stern list_for_each_entry(td, &urbp->td_list, list) { 129c8155cc5SAlan Stern if (urbp->qh->type != USB_ENDPOINT_XFER_ISOC && 130c8155cc5SAlan Stern (++i <= 10 || debug > 2)) { 131dccf4a48SAlan Stern out += sprintf(out, "%*s%d: ", space + 2, "", i); 132dccf4a48SAlan Stern out += uhci_show_td(td, out, len - (out - buf), 0); 133dccf4a48SAlan Stern } else { 134dccf4a48SAlan Stern if (td_status(td) & TD_CTRL_ACTIVE) 135dccf4a48SAlan Stern ++nactive; 136dccf4a48SAlan Stern else 137dccf4a48SAlan Stern ++ninactive; 138dccf4a48SAlan Stern } 139dccf4a48SAlan Stern } 140dccf4a48SAlan Stern if (nactive + ninactive > 0) 141dccf4a48SAlan Stern out += sprintf(out, "%*s[skipped %d inactive and %d active " 142dccf4a48SAlan Stern "TDs]\n", 143dccf4a48SAlan Stern space, "", ninactive, nactive); 144dccf4a48SAlan Stern 145dccf4a48SAlan Stern return out - buf; 146dccf4a48SAlan Stern } 147dccf4a48SAlan Stern 1481da177e4SLinus Torvalds static int uhci_show_qh(struct uhci_qh *qh, char *buf, int len, int space) 1491da177e4SLinus Torvalds { 1501da177e4SLinus Torvalds char *out = buf; 151dccf4a48SAlan Stern int i, nurbs; 1521da177e4SLinus Torvalds __le32 element = qh_element(qh); 1534de7d2c2SAlan Stern char *qtype; 1541da177e4SLinus Torvalds 1551da177e4SLinus Torvalds /* Try to make sure there's enough memory */ 156caf3827aSAlan Stern if (len < 80 * 7) 1571da177e4SLinus Torvalds return 0; 1581da177e4SLinus Torvalds 1594de7d2c2SAlan Stern switch (qh->type) { 1604de7d2c2SAlan Stern case USB_ENDPOINT_XFER_ISOC: qtype = "ISO"; break; 1614de7d2c2SAlan Stern case USB_ENDPOINT_XFER_INT: qtype = "INT"; break; 1624de7d2c2SAlan Stern case USB_ENDPOINT_XFER_BULK: qtype = "BLK"; break; 1634de7d2c2SAlan Stern case USB_ENDPOINT_XFER_CONTROL: qtype = "CTL"; break; 1644de7d2c2SAlan Stern default: qtype = "Skel" ; break; 1654de7d2c2SAlan Stern } 1664de7d2c2SAlan Stern 1674de7d2c2SAlan Stern out += sprintf(out, "%*s[%p] %s QH link (%08x) element (%08x)\n", 1684de7d2c2SAlan Stern space, "", qh, qtype, 1694de7d2c2SAlan Stern le32_to_cpu(qh->link), le32_to_cpu(element)); 170caf3827aSAlan Stern if (qh->type == USB_ENDPOINT_XFER_ISOC) 1713ca2a321SAlan Stern out += sprintf(out, "%*s period %d phase %d load %d us, " 1723ca2a321SAlan Stern "frame %x desc [%p]\n", 1733ca2a321SAlan Stern space, "", qh->period, qh->phase, qh->load, 1743ca2a321SAlan Stern qh->iso_frame, qh->iso_packet_desc); 1753ca2a321SAlan Stern else if (qh->type == USB_ENDPOINT_XFER_INT) 1763ca2a321SAlan Stern out += sprintf(out, "%*s period %d phase %d load %d us\n", 1773ca2a321SAlan Stern space, "", qh->period, qh->phase, qh->load); 1781da177e4SLinus Torvalds 1791da177e4SLinus Torvalds if (element & UHCI_PTR_QH) 1801da177e4SLinus Torvalds out += sprintf(out, "%*s Element points to QH (bug?)\n", space, ""); 1811da177e4SLinus Torvalds 1821da177e4SLinus Torvalds if (element & UHCI_PTR_DEPTH) 1831da177e4SLinus Torvalds out += sprintf(out, "%*s Depth traverse\n", space, ""); 1841da177e4SLinus Torvalds 1851da177e4SLinus Torvalds if (element & cpu_to_le32(8)) 1861da177e4SLinus Torvalds out += sprintf(out, "%*s Bit 3 set (bug?)\n", space, ""); 1871da177e4SLinus Torvalds 1881da177e4SLinus Torvalds if (!(element & ~(UHCI_PTR_QH | UHCI_PTR_DEPTH))) 1891da177e4SLinus Torvalds out += sprintf(out, "%*s Element is NULL (bug?)\n", space, ""); 1901da177e4SLinus Torvalds 191dccf4a48SAlan Stern if (list_empty(&qh->queue)) { 192dccf4a48SAlan Stern out += sprintf(out, "%*s queue is empty\n", space, ""); 193dccf4a48SAlan Stern } else { 194dccf4a48SAlan Stern struct urb_priv *urbp = list_entry(qh->queue.next, 195dccf4a48SAlan Stern struct urb_priv, node); 196dccf4a48SAlan Stern struct uhci_td *td = list_entry(urbp->td_list.next, 197dccf4a48SAlan Stern struct uhci_td, list); 1981da177e4SLinus Torvalds 19928b9325eSAlan Stern if (element != LINK_TO_TD(td)) 200dccf4a48SAlan Stern out += sprintf(out, "%*s Element != First TD\n", 201dccf4a48SAlan Stern space, ""); 202dccf4a48SAlan Stern i = nurbs = 0; 203dccf4a48SAlan Stern list_for_each_entry(urbp, &qh->queue, node) { 204dccf4a48SAlan Stern if (++i <= 10) 205dccf4a48SAlan Stern out += uhci_show_urbp(urbp, out, 206dccf4a48SAlan Stern len - (out - buf), space + 2); 207dccf4a48SAlan Stern else 208dccf4a48SAlan Stern ++nurbs; 209dccf4a48SAlan Stern } 210dccf4a48SAlan Stern if (nurbs > 0) 211dccf4a48SAlan Stern out += sprintf(out, "%*s Skipped %d URBs\n", 212dccf4a48SAlan Stern space, "", nurbs); 2131da177e4SLinus Torvalds } 2141da177e4SLinus Torvalds 21585a975d0SAlan Stern if (qh->dummy_td) { 216af0bb599SAlan Stern out += sprintf(out, "%*s Dummy TD\n", space, ""); 217af0bb599SAlan Stern out += uhci_show_td(qh->dummy_td, out, len - (out - buf), 0); 218af0bb599SAlan Stern } 219af0bb599SAlan Stern 2201da177e4SLinus Torvalds return out - buf; 2211da177e4SLinus Torvalds } 2221da177e4SLinus Torvalds 2234c4c9432SArjan van de Ven static const char * const qh_names[] = { 224dccf4a48SAlan Stern "skel_unlink_qh", "skel_iso_qh", 2251da177e4SLinus Torvalds "skel_int128_qh", "skel_int64_qh", 2261da177e4SLinus Torvalds "skel_int32_qh", "skel_int16_qh", 2271da177e4SLinus Torvalds "skel_int8_qh", "skel_int4_qh", 2281da177e4SLinus Torvalds "skel_int2_qh", "skel_int1_qh", 2291da177e4SLinus Torvalds "skel_ls_control_qh", "skel_fs_control_qh", 2301da177e4SLinus Torvalds "skel_bulk_qh", "skel_term_qh" 2311da177e4SLinus Torvalds }; 2321da177e4SLinus Torvalds 2331da177e4SLinus Torvalds static int uhci_show_sc(int port, unsigned short status, char *buf, int len) 2341da177e4SLinus Torvalds { 2351da177e4SLinus Torvalds char *out = buf; 2361da177e4SLinus Torvalds 2371da177e4SLinus Torvalds /* Try to make sure there's enough memory */ 2381da177e4SLinus Torvalds if (len < 160) 2391da177e4SLinus Torvalds return 0; 2401da177e4SLinus Torvalds 2411da177e4SLinus Torvalds out += sprintf(out, " stat%d = %04x %s%s%s%s%s%s%s%s%s%s\n", 2421da177e4SLinus Torvalds port, 2431da177e4SLinus Torvalds status, 2441da177e4SLinus Torvalds (status & USBPORTSC_SUSP) ? " Suspend" : "", 2451da177e4SLinus Torvalds (status & USBPORTSC_OCC) ? " OverCurrentChange" : "", 2461da177e4SLinus Torvalds (status & USBPORTSC_OC) ? " OverCurrent" : "", 2471da177e4SLinus Torvalds (status & USBPORTSC_PR) ? " Reset" : "", 2481da177e4SLinus Torvalds (status & USBPORTSC_LSDA) ? " LowSpeed" : "", 2491da177e4SLinus Torvalds (status & USBPORTSC_RD) ? " ResumeDetect" : "", 2501da177e4SLinus Torvalds (status & USBPORTSC_PEC) ? " EnableChange" : "", 2511da177e4SLinus Torvalds (status & USBPORTSC_PE) ? " Enabled" : "", 2521da177e4SLinus Torvalds (status & USBPORTSC_CSC) ? " ConnectChange" : "", 2531da177e4SLinus Torvalds (status & USBPORTSC_CCS) ? " Connected" : ""); 2541da177e4SLinus Torvalds 2551da177e4SLinus Torvalds return out - buf; 2561da177e4SLinus Torvalds } 2571da177e4SLinus Torvalds 258c8f4fe43SAlan Stern static int uhci_show_root_hub_state(struct uhci_hcd *uhci, char *buf, int len) 259c8f4fe43SAlan Stern { 260c8f4fe43SAlan Stern char *out = buf; 261c8f4fe43SAlan Stern char *rh_state; 262c8f4fe43SAlan Stern 263c8f4fe43SAlan Stern /* Try to make sure there's enough memory */ 264c8f4fe43SAlan Stern if (len < 60) 265c8f4fe43SAlan Stern return 0; 266c8f4fe43SAlan Stern 267c8f4fe43SAlan Stern switch (uhci->rh_state) { 268c8f4fe43SAlan Stern case UHCI_RH_RESET: 269c8f4fe43SAlan Stern rh_state = "reset"; break; 270c8f4fe43SAlan Stern case UHCI_RH_SUSPENDED: 271c8f4fe43SAlan Stern rh_state = "suspended"; break; 272c8f4fe43SAlan Stern case UHCI_RH_AUTO_STOPPED: 273c8f4fe43SAlan Stern rh_state = "auto-stopped"; break; 274c8f4fe43SAlan Stern case UHCI_RH_RESUMING: 275c8f4fe43SAlan Stern rh_state = "resuming"; break; 276c8f4fe43SAlan Stern case UHCI_RH_SUSPENDING: 277c8f4fe43SAlan Stern rh_state = "suspending"; break; 278c8f4fe43SAlan Stern case UHCI_RH_RUNNING: 279c8f4fe43SAlan Stern rh_state = "running"; break; 280c8f4fe43SAlan Stern case UHCI_RH_RUNNING_NODEVS: 281c8f4fe43SAlan Stern rh_state = "running, no devs"; break; 282c8f4fe43SAlan Stern default: 283c8f4fe43SAlan Stern rh_state = "?"; break; 284c8f4fe43SAlan Stern } 28584afddd7SAlan Stern out += sprintf(out, "Root-hub state: %s FSBR: %d\n", 28684afddd7SAlan Stern rh_state, uhci->fsbr_is_on); 287c8f4fe43SAlan Stern return out - buf; 288c8f4fe43SAlan Stern } 289c8f4fe43SAlan Stern 2901da177e4SLinus Torvalds static int uhci_show_status(struct uhci_hcd *uhci, char *buf, int len) 2911da177e4SLinus Torvalds { 2921da177e4SLinus Torvalds char *out = buf; 2931da177e4SLinus Torvalds unsigned long io_addr = uhci->io_addr; 2941da177e4SLinus Torvalds unsigned short usbcmd, usbstat, usbint, usbfrnum; 2951da177e4SLinus Torvalds unsigned int flbaseadd; 2961da177e4SLinus Torvalds unsigned char sof; 2971da177e4SLinus Torvalds unsigned short portsc1, portsc2; 2981da177e4SLinus Torvalds 2991da177e4SLinus Torvalds /* Try to make sure there's enough memory */ 300c4334726SAlan Stern if (len < 80 * 9) 3011da177e4SLinus Torvalds return 0; 3021da177e4SLinus Torvalds 3031da177e4SLinus Torvalds usbcmd = inw(io_addr + 0); 3041da177e4SLinus Torvalds usbstat = inw(io_addr + 2); 3051da177e4SLinus Torvalds usbint = inw(io_addr + 4); 3061da177e4SLinus Torvalds usbfrnum = inw(io_addr + 6); 3071da177e4SLinus Torvalds flbaseadd = inl(io_addr + 8); 3081da177e4SLinus Torvalds sof = inb(io_addr + 12); 3091da177e4SLinus Torvalds portsc1 = inw(io_addr + 16); 3101da177e4SLinus Torvalds portsc2 = inw(io_addr + 18); 3111da177e4SLinus Torvalds 3121da177e4SLinus Torvalds out += sprintf(out, " usbcmd = %04x %s%s%s%s%s%s%s%s\n", 3131da177e4SLinus Torvalds usbcmd, 3141da177e4SLinus Torvalds (usbcmd & USBCMD_MAXP) ? "Maxp64 " : "Maxp32 ", 3151da177e4SLinus Torvalds (usbcmd & USBCMD_CF) ? "CF " : "", 3161da177e4SLinus Torvalds (usbcmd & USBCMD_SWDBG) ? "SWDBG " : "", 3171da177e4SLinus Torvalds (usbcmd & USBCMD_FGR) ? "FGR " : "", 3181da177e4SLinus Torvalds (usbcmd & USBCMD_EGSM) ? "EGSM " : "", 3191da177e4SLinus Torvalds (usbcmd & USBCMD_GRESET) ? "GRESET " : "", 3201da177e4SLinus Torvalds (usbcmd & USBCMD_HCRESET) ? "HCRESET " : "", 3211da177e4SLinus Torvalds (usbcmd & USBCMD_RS) ? "RS " : ""); 3221da177e4SLinus Torvalds 3231da177e4SLinus Torvalds out += sprintf(out, " usbstat = %04x %s%s%s%s%s%s\n", 3241da177e4SLinus Torvalds usbstat, 3251da177e4SLinus Torvalds (usbstat & USBSTS_HCH) ? "HCHalted " : "", 3261da177e4SLinus Torvalds (usbstat & USBSTS_HCPE) ? "HostControllerProcessError " : "", 3271da177e4SLinus Torvalds (usbstat & USBSTS_HSE) ? "HostSystemError " : "", 3281da177e4SLinus Torvalds (usbstat & USBSTS_RD) ? "ResumeDetect " : "", 3291da177e4SLinus Torvalds (usbstat & USBSTS_ERROR) ? "USBError " : "", 3301da177e4SLinus Torvalds (usbstat & USBSTS_USBINT) ? "USBINT " : ""); 3311da177e4SLinus Torvalds 3321da177e4SLinus Torvalds out += sprintf(out, " usbint = %04x\n", usbint); 3331da177e4SLinus Torvalds out += sprintf(out, " usbfrnum = (%d)%03x\n", (usbfrnum >> 10) & 1, 3341da177e4SLinus Torvalds 0xfff & (4*(unsigned int)usbfrnum)); 3351da177e4SLinus Torvalds out += sprintf(out, " flbaseadd = %08x\n", flbaseadd); 3361da177e4SLinus Torvalds out += sprintf(out, " sof = %02x\n", sof); 3371da177e4SLinus Torvalds out += uhci_show_sc(1, portsc1, out, len - (out - buf)); 3381da177e4SLinus Torvalds out += uhci_show_sc(2, portsc2, out, len - (out - buf)); 339c8155cc5SAlan Stern out += sprintf(out, "Most recent frame: %x (%d) " 340c8155cc5SAlan Stern "Last ISO frame: %x (%d)\n", 341c8155cc5SAlan Stern uhci->frame_number, uhci->frame_number & 1023, 342c8155cc5SAlan Stern uhci->last_iso_frame, uhci->last_iso_frame & 1023); 3431da177e4SLinus Torvalds 3441da177e4SLinus Torvalds return out - buf; 3451da177e4SLinus Torvalds } 3461da177e4SLinus Torvalds 3471da177e4SLinus Torvalds static int uhci_sprint_schedule(struct uhci_hcd *uhci, char *buf, int len) 3481da177e4SLinus Torvalds { 3491da177e4SLinus Torvalds char *out = buf; 3501da177e4SLinus Torvalds int i, j; 3511da177e4SLinus Torvalds struct uhci_qh *qh; 3521da177e4SLinus Torvalds struct uhci_td *td; 3531da177e4SLinus Torvalds struct list_head *tmp, *head; 354f3fe239bSAlan Stern int nframes, nerrs; 3551da177e4SLinus Torvalds 356c8f4fe43SAlan Stern out += uhci_show_root_hub_state(uhci, out, len - (out - buf)); 3571da177e4SLinus Torvalds out += sprintf(out, "HC status\n"); 3581da177e4SLinus Torvalds out += uhci_show_status(uhci, out, len - (out - buf)); 3593ca2a321SAlan Stern 3603ca2a321SAlan Stern out += sprintf(out, "Periodic load table\n"); 3613ca2a321SAlan Stern for (i = 0; i < MAX_PHASE; ++i) { 3623ca2a321SAlan Stern out += sprintf(out, "\t%d", uhci->load[i]); 3633ca2a321SAlan Stern if (i % 8 == 7) 3643ca2a321SAlan Stern *out++ = '\n'; 3653ca2a321SAlan Stern } 3663ca2a321SAlan Stern out += sprintf(out, "Total: %d, #INT: %d, #ISO: %d\n", 3673ca2a321SAlan Stern uhci->total_load, 3683ca2a321SAlan Stern uhci_to_hcd(uhci)->self.bandwidth_int_reqs, 3693ca2a321SAlan Stern uhci_to_hcd(uhci)->self.bandwidth_isoc_reqs); 370dccf4a48SAlan Stern if (debug <= 1) 371dccf4a48SAlan Stern return out - buf; 3721da177e4SLinus Torvalds 3731da177e4SLinus Torvalds out += sprintf(out, "Frame List\n"); 374f3fe239bSAlan Stern nframes = 10; 375f3fe239bSAlan Stern nerrs = 0; 3761da177e4SLinus Torvalds for (i = 0; i < UHCI_NUMFRAMES; ++i) { 377f3fe239bSAlan Stern __le32 link, qh_dma; 3781da177e4SLinus Torvalds 379f3fe239bSAlan Stern j = 0; 380f3fe239bSAlan Stern td = uhci->frame_cpu[i]; 381f3fe239bSAlan Stern link = uhci->frame[i]; 382f3fe239bSAlan Stern if (!td) 383f3fe239bSAlan Stern goto check_link; 384f3fe239bSAlan Stern 385f3fe239bSAlan Stern if (nframes > 0) { 386f3fe239bSAlan Stern out += sprintf(out, "- Frame %d -> (%08x)\n", 387f3fe239bSAlan Stern i, le32_to_cpu(link)); 388f3fe239bSAlan Stern j = 1; 389f3fe239bSAlan Stern } 3901da177e4SLinus Torvalds 3911da177e4SLinus Torvalds head = &td->fl_list; 3921da177e4SLinus Torvalds tmp = head; 3931da177e4SLinus Torvalds do { 3941da177e4SLinus Torvalds td = list_entry(tmp, struct uhci_td, fl_list); 3951da177e4SLinus Torvalds tmp = tmp->next; 39628b9325eSAlan Stern if (link != LINK_TO_TD(td)) { 397f3fe239bSAlan Stern if (nframes > 0) 398f3fe239bSAlan Stern out += sprintf(out, " link does " 399f3fe239bSAlan Stern "not match list entry!\n"); 400f3fe239bSAlan Stern else 401f3fe239bSAlan Stern ++nerrs; 4021da177e4SLinus Torvalds } 403f3fe239bSAlan Stern if (nframes > 0) 404f3fe239bSAlan Stern out += uhci_show_td(td, out, 405f3fe239bSAlan Stern len - (out - buf), 4); 406f3fe239bSAlan Stern link = td->link; 407f3fe239bSAlan Stern } while (tmp != head); 408f3fe239bSAlan Stern 409f3fe239bSAlan Stern check_link: 410f3fe239bSAlan Stern qh_dma = uhci_frame_skel_link(uhci, i); 411f3fe239bSAlan Stern if (link != qh_dma) { 412f3fe239bSAlan Stern if (nframes > 0) { 413f3fe239bSAlan Stern if (!j) { 414f3fe239bSAlan Stern out += sprintf(out, 415f3fe239bSAlan Stern "- Frame %d -> (%08x)\n", 416f3fe239bSAlan Stern i, le32_to_cpu(link)); 417f3fe239bSAlan Stern j = 1; 418f3fe239bSAlan Stern } 419f3fe239bSAlan Stern out += sprintf(out, " link does not match " 420f3fe239bSAlan Stern "QH (%08x)!\n", le32_to_cpu(qh_dma)); 421f3fe239bSAlan Stern } else 422f3fe239bSAlan Stern ++nerrs; 423f3fe239bSAlan Stern } 424f3fe239bSAlan Stern nframes -= j; 425f3fe239bSAlan Stern } 426f3fe239bSAlan Stern if (nerrs > 0) 427f3fe239bSAlan Stern out += sprintf(out, "Skipped %d bad links\n", nerrs); 4281da177e4SLinus Torvalds 429687f5f34SAlan Stern out += sprintf(out, "Skeleton QHs\n"); 4301da177e4SLinus Torvalds 4311da177e4SLinus Torvalds for (i = 0; i < UHCI_NUM_SKELQH; ++i) { 432dccf4a48SAlan Stern int cnt = 0; 4331da177e4SLinus Torvalds 4341da177e4SLinus Torvalds qh = uhci->skelqh[i]; 435dccf4a48SAlan Stern out += sprintf(out, "- %s\n", qh_names[i]); \ 4361da177e4SLinus Torvalds out += uhci_show_qh(qh, out, len - (out - buf), 4); 4371da177e4SLinus Torvalds 4381da177e4SLinus Torvalds /* Last QH is the Terminating QH, it's different */ 4391da177e4SLinus Torvalds if (i == UHCI_NUM_SKELQH - 1) { 4401da177e4SLinus Torvalds if (qh->link != UHCI_PTR_TERM) 4411da177e4SLinus Torvalds out += sprintf(out, " bandwidth reclamation on!\n"); 4421da177e4SLinus Torvalds 44328b9325eSAlan Stern if (qh_element(qh) != LINK_TO_TD(uhci->term_td)) 4441da177e4SLinus Torvalds out += sprintf(out, " skel_term_qh element is not set to term_td!\n"); 4451da177e4SLinus Torvalds 4461da177e4SLinus Torvalds continue; 4471da177e4SLinus Torvalds } 4481da177e4SLinus Torvalds 449dccf4a48SAlan Stern j = (i < 9) ? 9 : i+1; /* Next skeleton */ 450dccf4a48SAlan Stern head = &qh->node; 4511da177e4SLinus Torvalds tmp = head->next; 4521da177e4SLinus Torvalds 4531da177e4SLinus Torvalds while (tmp != head) { 454dccf4a48SAlan Stern qh = list_entry(tmp, struct uhci_qh, node); 4551da177e4SLinus Torvalds tmp = tmp->next; 456dccf4a48SAlan Stern if (++cnt <= 10) 457dccf4a48SAlan Stern out += uhci_show_qh(qh, out, 458dccf4a48SAlan Stern len - (out - buf), 4); 4591da177e4SLinus Torvalds } 460dccf4a48SAlan Stern if ((cnt -= 10) > 0) 461dccf4a48SAlan Stern out += sprintf(out, " Skipped %d QHs\n", cnt); 4621da177e4SLinus Torvalds 463dccf4a48SAlan Stern if (i > 1 && i < UHCI_NUM_SKELQH - 1) { 46428b9325eSAlan Stern if (qh->link != LINK_TO_QH(uhci->skelqh[j])) 4651da177e4SLinus Torvalds out += sprintf(out, " last QH not linked to next skeleton!\n"); 4661da177e4SLinus Torvalds } 4671da177e4SLinus Torvalds } 4681da177e4SLinus Torvalds 4691da177e4SLinus Torvalds return out - buf; 4701da177e4SLinus Torvalds } 4711da177e4SLinus Torvalds 4728d402e1aSAlan Stern #ifdef CONFIG_DEBUG_FS 4738d402e1aSAlan Stern 4741da177e4SLinus Torvalds #define MAX_OUTPUT (64 * 1024) 4751da177e4SLinus Torvalds 4761da177e4SLinus Torvalds struct uhci_debug { 4771da177e4SLinus Torvalds int size; 4781da177e4SLinus Torvalds char *data; 4791da177e4SLinus Torvalds }; 4801da177e4SLinus Torvalds 4811da177e4SLinus Torvalds static int uhci_debug_open(struct inode *inode, struct file *file) 4821da177e4SLinus Torvalds { 4838e18e294STheodore Ts'o struct uhci_hcd *uhci = inode->i_private; 4841da177e4SLinus Torvalds struct uhci_debug *up; 4851da177e4SLinus Torvalds int ret = -ENOMEM; 486dccf4a48SAlan Stern unsigned long flags; 4871da177e4SLinus Torvalds 4881da177e4SLinus Torvalds lock_kernel(); 4891da177e4SLinus Torvalds up = kmalloc(sizeof(*up), GFP_KERNEL); 4901da177e4SLinus Torvalds if (!up) 4911da177e4SLinus Torvalds goto out; 4921da177e4SLinus Torvalds 4931da177e4SLinus Torvalds up->data = kmalloc(MAX_OUTPUT, GFP_KERNEL); 4941da177e4SLinus Torvalds if (!up->data) { 4951da177e4SLinus Torvalds kfree(up); 4961da177e4SLinus Torvalds goto out; 4971da177e4SLinus Torvalds } 4981da177e4SLinus Torvalds 4998d402e1aSAlan Stern up->size = 0; 500dccf4a48SAlan Stern spin_lock_irqsave(&uhci->lock, flags); 5018d402e1aSAlan Stern if (uhci->is_initialized) 5021da177e4SLinus Torvalds up->size = uhci_sprint_schedule(uhci, up->data, MAX_OUTPUT); 503dccf4a48SAlan Stern spin_unlock_irqrestore(&uhci->lock, flags); 5041da177e4SLinus Torvalds 5051da177e4SLinus Torvalds file->private_data = up; 5061da177e4SLinus Torvalds 5071da177e4SLinus Torvalds ret = 0; 5081da177e4SLinus Torvalds out: 5091da177e4SLinus Torvalds unlock_kernel(); 5101da177e4SLinus Torvalds return ret; 5111da177e4SLinus Torvalds } 5121da177e4SLinus Torvalds 5131da177e4SLinus Torvalds static loff_t uhci_debug_lseek(struct file *file, loff_t off, int whence) 5141da177e4SLinus Torvalds { 5151da177e4SLinus Torvalds struct uhci_debug *up; 5161da177e4SLinus Torvalds loff_t new = -1; 5171da177e4SLinus Torvalds 5181da177e4SLinus Torvalds lock_kernel(); 5191da177e4SLinus Torvalds up = file->private_data; 5201da177e4SLinus Torvalds 5211da177e4SLinus Torvalds switch (whence) { 5221da177e4SLinus Torvalds case 0: 5231da177e4SLinus Torvalds new = off; 5241da177e4SLinus Torvalds break; 5251da177e4SLinus Torvalds case 1: 5261da177e4SLinus Torvalds new = file->f_pos + off; 5271da177e4SLinus Torvalds break; 5281da177e4SLinus Torvalds } 5291da177e4SLinus Torvalds if (new < 0 || new > up->size) { 5301da177e4SLinus Torvalds unlock_kernel(); 5311da177e4SLinus Torvalds return -EINVAL; 5321da177e4SLinus Torvalds } 5331da177e4SLinus Torvalds unlock_kernel(); 5341da177e4SLinus Torvalds return (file->f_pos = new); 5351da177e4SLinus Torvalds } 5361da177e4SLinus Torvalds 5371da177e4SLinus Torvalds static ssize_t uhci_debug_read(struct file *file, char __user *buf, 5381da177e4SLinus Torvalds size_t nbytes, loff_t *ppos) 5391da177e4SLinus Torvalds { 5401da177e4SLinus Torvalds struct uhci_debug *up = file->private_data; 5411da177e4SLinus Torvalds return simple_read_from_buffer(buf, nbytes, ppos, up->data, up->size); 5421da177e4SLinus Torvalds } 5431da177e4SLinus Torvalds 5441da177e4SLinus Torvalds static int uhci_debug_release(struct inode *inode, struct file *file) 5451da177e4SLinus Torvalds { 5461da177e4SLinus Torvalds struct uhci_debug *up = file->private_data; 5471da177e4SLinus Torvalds 5481da177e4SLinus Torvalds kfree(up->data); 5491da177e4SLinus Torvalds kfree(up); 5501da177e4SLinus Torvalds 5511da177e4SLinus Torvalds return 0; 5521da177e4SLinus Torvalds } 5531da177e4SLinus Torvalds 5548d402e1aSAlan Stern #undef uhci_debug_operations 555066202ddSLuiz Fernando N. Capitulino static const struct file_operations uhci_debug_operations = { 5568d402e1aSAlan Stern .owner = THIS_MODULE, 5571da177e4SLinus Torvalds .open = uhci_debug_open, 5581da177e4SLinus Torvalds .llseek = uhci_debug_lseek, 5591da177e4SLinus Torvalds .read = uhci_debug_read, 5601da177e4SLinus Torvalds .release = uhci_debug_release, 5611da177e4SLinus Torvalds }; 5621da177e4SLinus Torvalds 5638d402e1aSAlan Stern #endif /* CONFIG_DEBUG_FS */ 5641da177e4SLinus Torvalds 5658d402e1aSAlan Stern #else /* DEBUG */ 5668d402e1aSAlan Stern 5678d402e1aSAlan Stern static inline void lprintk(char *buf) 5688d402e1aSAlan Stern {} 5698d402e1aSAlan Stern 5708d402e1aSAlan Stern static inline int uhci_show_qh(struct uhci_qh *qh, char *buf, 5718d402e1aSAlan Stern int len, int space) 5728d402e1aSAlan Stern { 5738d402e1aSAlan Stern return 0; 5748d402e1aSAlan Stern } 5758d402e1aSAlan Stern 5768d402e1aSAlan Stern static inline int uhci_sprint_schedule(struct uhci_hcd *uhci, 5778d402e1aSAlan Stern char *buf, int len) 5788d402e1aSAlan Stern { 5798d402e1aSAlan Stern return 0; 5808d402e1aSAlan Stern } 5811da177e4SLinus Torvalds 5821da177e4SLinus Torvalds #endif 583