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![Alan Stern](/assets/img/avatar_default.png)
This patch (as1664) converts ehci-hcd's async_unlink, async_iaa, and intr_unlink from singly-linked lists to standard doubly-linked list_heads. Originally it didn't seem necessary to use list_heads, because items are always added to and removed from these lists in FIFO order. But now with more list processing going on, it's easier to use the standard routines than continue with a roll-your-own approach. I don't know if the code ends up being notably shorter, but the patterns will be more familiar to any kernel hacker. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
980 lines
25 KiB
C
980 lines
25 KiB
C
/*
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* Copyright (c) 2001-2002 by David Brownell
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/* this file is part of ehci-hcd.c */
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#ifdef DEBUG
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/* check the values in the HCSPARAMS register
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* (host controller _Structural_ parameters)
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* see EHCI spec, Table 2-4 for each value
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*/
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static void dbg_hcs_params (struct ehci_hcd *ehci, char *label)
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{
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u32 params = ehci_readl(ehci, &ehci->caps->hcs_params);
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ehci_dbg (ehci,
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"%s hcs_params 0x%x dbg=%d%s cc=%d pcc=%d%s%s ports=%d\n",
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label, params,
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HCS_DEBUG_PORT (params),
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HCS_INDICATOR (params) ? " ind" : "",
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HCS_N_CC (params),
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HCS_N_PCC (params),
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HCS_PORTROUTED (params) ? "" : " ordered",
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HCS_PPC (params) ? "" : " !ppc",
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HCS_N_PORTS (params)
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);
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/* Port routing, per EHCI 0.95 Spec, Section 2.2.5 */
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if (HCS_PORTROUTED (params)) {
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int i;
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char buf [46], tmp [7], byte;
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buf[0] = 0;
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for (i = 0; i < HCS_N_PORTS (params); i++) {
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// FIXME MIPS won't readb() ...
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byte = readb (&ehci->caps->portroute[(i>>1)]);
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sprintf(tmp, "%d ",
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((i & 0x1) ? ((byte)&0xf) : ((byte>>4)&0xf)));
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strcat(buf, tmp);
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}
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ehci_dbg (ehci, "%s portroute %s\n",
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label, buf);
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}
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}
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#else
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static inline void dbg_hcs_params (struct ehci_hcd *ehci, char *label) {}
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#endif
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#ifdef DEBUG
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/* check the values in the HCCPARAMS register
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* (host controller _Capability_ parameters)
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* see EHCI Spec, Table 2-5 for each value
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* */
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static void dbg_hcc_params (struct ehci_hcd *ehci, char *label)
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{
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u32 params = ehci_readl(ehci, &ehci->caps->hcc_params);
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if (HCC_ISOC_CACHE (params)) {
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ehci_dbg (ehci,
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"%s hcc_params %04x caching frame %s%s%s\n",
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label, params,
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HCC_PGM_FRAMELISTLEN(params) ? "256/512/1024" : "1024",
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HCC_CANPARK(params) ? " park" : "",
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HCC_64BIT_ADDR(params) ? " 64 bit addr" : "");
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} else {
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ehci_dbg (ehci,
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"%s hcc_params %04x thresh %d uframes %s%s%s%s%s%s%s\n",
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label,
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params,
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HCC_ISOC_THRES(params),
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HCC_PGM_FRAMELISTLEN(params) ? "256/512/1024" : "1024",
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HCC_CANPARK(params) ? " park" : "",
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HCC_64BIT_ADDR(params) ? " 64 bit addr" : "",
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HCC_LPM(params) ? " LPM" : "",
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HCC_PER_PORT_CHANGE_EVENT(params) ? " ppce" : "",
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HCC_HW_PREFETCH(params) ? " hw prefetch" : "",
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HCC_32FRAME_PERIODIC_LIST(params) ?
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" 32 periodic list" : "");
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}
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}
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#else
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static inline void dbg_hcc_params (struct ehci_hcd *ehci, char *label) {}
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#endif
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#ifdef DEBUG
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static void __maybe_unused
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dbg_qtd (const char *label, struct ehci_hcd *ehci, struct ehci_qtd *qtd)
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{
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ehci_dbg(ehci, "%s td %p n%08x %08x t%08x p0=%08x\n", label, qtd,
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hc32_to_cpup(ehci, &qtd->hw_next),
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hc32_to_cpup(ehci, &qtd->hw_alt_next),
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hc32_to_cpup(ehci, &qtd->hw_token),
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hc32_to_cpup(ehci, &qtd->hw_buf [0]));
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if (qtd->hw_buf [1])
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ehci_dbg(ehci, " p1=%08x p2=%08x p3=%08x p4=%08x\n",
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hc32_to_cpup(ehci, &qtd->hw_buf[1]),
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hc32_to_cpup(ehci, &qtd->hw_buf[2]),
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hc32_to_cpup(ehci, &qtd->hw_buf[3]),
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hc32_to_cpup(ehci, &qtd->hw_buf[4]));
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}
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static void __maybe_unused
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dbg_qh (const char *label, struct ehci_hcd *ehci, struct ehci_qh *qh)
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{
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struct ehci_qh_hw *hw = qh->hw;
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ehci_dbg (ehci, "%s qh %p n%08x info %x %x qtd %x\n", label,
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qh, hw->hw_next, hw->hw_info1, hw->hw_info2, hw->hw_current);
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dbg_qtd("overlay", ehci, (struct ehci_qtd *) &hw->hw_qtd_next);
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}
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static void __maybe_unused
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dbg_itd (const char *label, struct ehci_hcd *ehci, struct ehci_itd *itd)
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{
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ehci_dbg (ehci, "%s [%d] itd %p, next %08x, urb %p\n",
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label, itd->frame, itd, hc32_to_cpu(ehci, itd->hw_next),
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itd->urb);
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ehci_dbg (ehci,
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" trans: %08x %08x %08x %08x %08x %08x %08x %08x\n",
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hc32_to_cpu(ehci, itd->hw_transaction[0]),
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hc32_to_cpu(ehci, itd->hw_transaction[1]),
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hc32_to_cpu(ehci, itd->hw_transaction[2]),
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hc32_to_cpu(ehci, itd->hw_transaction[3]),
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hc32_to_cpu(ehci, itd->hw_transaction[4]),
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hc32_to_cpu(ehci, itd->hw_transaction[5]),
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hc32_to_cpu(ehci, itd->hw_transaction[6]),
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hc32_to_cpu(ehci, itd->hw_transaction[7]));
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ehci_dbg (ehci,
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" buf: %08x %08x %08x %08x %08x %08x %08x\n",
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hc32_to_cpu(ehci, itd->hw_bufp[0]),
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hc32_to_cpu(ehci, itd->hw_bufp[1]),
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hc32_to_cpu(ehci, itd->hw_bufp[2]),
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hc32_to_cpu(ehci, itd->hw_bufp[3]),
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hc32_to_cpu(ehci, itd->hw_bufp[4]),
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hc32_to_cpu(ehci, itd->hw_bufp[5]),
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hc32_to_cpu(ehci, itd->hw_bufp[6]));
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ehci_dbg (ehci, " index: %d %d %d %d %d %d %d %d\n",
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itd->index[0], itd->index[1], itd->index[2],
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itd->index[3], itd->index[4], itd->index[5],
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itd->index[6], itd->index[7]);
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}
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static void __maybe_unused
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dbg_sitd (const char *label, struct ehci_hcd *ehci, struct ehci_sitd *sitd)
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{
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ehci_dbg (ehci, "%s [%d] sitd %p, next %08x, urb %p\n",
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label, sitd->frame, sitd, hc32_to_cpu(ehci, sitd->hw_next),
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sitd->urb);
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ehci_dbg (ehci,
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" addr %08x sched %04x result %08x buf %08x %08x\n",
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hc32_to_cpu(ehci, sitd->hw_fullspeed_ep),
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hc32_to_cpu(ehci, sitd->hw_uframe),
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hc32_to_cpu(ehci, sitd->hw_results),
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hc32_to_cpu(ehci, sitd->hw_buf[0]),
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hc32_to_cpu(ehci, sitd->hw_buf[1]));
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}
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static int __maybe_unused
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dbg_status_buf (char *buf, unsigned len, const char *label, u32 status)
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{
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return scnprintf (buf, len,
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"%s%sstatus %04x%s%s%s%s%s%s%s%s%s%s%s",
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label, label [0] ? " " : "", status,
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(status & STS_PPCE_MASK) ? " PPCE" : "",
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(status & STS_ASS) ? " Async" : "",
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(status & STS_PSS) ? " Periodic" : "",
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(status & STS_RECL) ? " Recl" : "",
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(status & STS_HALT) ? " Halt" : "",
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(status & STS_IAA) ? " IAA" : "",
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(status & STS_FATAL) ? " FATAL" : "",
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(status & STS_FLR) ? " FLR" : "",
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(status & STS_PCD) ? " PCD" : "",
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(status & STS_ERR) ? " ERR" : "",
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(status & STS_INT) ? " INT" : ""
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);
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}
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static int __maybe_unused
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dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable)
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{
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return scnprintf (buf, len,
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"%s%sintrenable %02x%s%s%s%s%s%s%s",
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label, label [0] ? " " : "", enable,
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(enable & STS_PPCE_MASK) ? " PPCE" : "",
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(enable & STS_IAA) ? " IAA" : "",
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(enable & STS_FATAL) ? " FATAL" : "",
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(enable & STS_FLR) ? " FLR" : "",
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(enable & STS_PCD) ? " PCD" : "",
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(enable & STS_ERR) ? " ERR" : "",
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(enable & STS_INT) ? " INT" : ""
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);
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}
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static const char *const fls_strings [] =
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{ "1024", "512", "256", "??" };
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static int
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dbg_command_buf (char *buf, unsigned len, const char *label, u32 command)
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{
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return scnprintf (buf, len,
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"%s%scommand %07x %s%s%s%s%s%s=%d ithresh=%d%s%s%s%s "
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"period=%s%s %s",
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label, label [0] ? " " : "", command,
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(command & CMD_HIRD) ? " HIRD" : "",
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(command & CMD_PPCEE) ? " PPCEE" : "",
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(command & CMD_FSP) ? " FSP" : "",
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(command & CMD_ASPE) ? " ASPE" : "",
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(command & CMD_PSPE) ? " PSPE" : "",
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(command & CMD_PARK) ? " park" : "(park)",
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CMD_PARK_CNT (command),
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(command >> 16) & 0x3f,
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(command & CMD_LRESET) ? " LReset" : "",
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(command & CMD_IAAD) ? " IAAD" : "",
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(command & CMD_ASE) ? " Async" : "",
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(command & CMD_PSE) ? " Periodic" : "",
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fls_strings [(command >> 2) & 0x3],
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(command & CMD_RESET) ? " Reset" : "",
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(command & CMD_RUN) ? "RUN" : "HALT"
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);
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}
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static int
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dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status)
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{
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char *sig;
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/* signaling state */
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switch (status & (3 << 10)) {
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case 0 << 10: sig = "se0"; break;
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case 1 << 10: sig = "k"; break; /* low speed */
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case 2 << 10: sig = "j"; break;
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default: sig = "?"; break;
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}
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return scnprintf (buf, len,
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"%s%sport:%d status %06x %d %s%s%s%s%s%s "
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"sig=%s%s%s%s%s%s%s%s%s%s%s",
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label, label [0] ? " " : "", port, status,
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status>>25,/*device address */
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(status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_ACK ?
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" ACK" : "",
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(status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_NYET ?
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" NYET" : "",
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(status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_STALL ?
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" STALL" : "",
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(status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_ERR ?
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" ERR" : "",
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(status & PORT_POWER) ? " POWER" : "",
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(status & PORT_OWNER) ? " OWNER" : "",
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sig,
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(status & PORT_LPM) ? " LPM" : "",
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(status & PORT_RESET) ? " RESET" : "",
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(status & PORT_SUSPEND) ? " SUSPEND" : "",
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(status & PORT_RESUME) ? " RESUME" : "",
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(status & PORT_OCC) ? " OCC" : "",
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(status & PORT_OC) ? " OC" : "",
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(status & PORT_PEC) ? " PEC" : "",
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(status & PORT_PE) ? " PE" : "",
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(status & PORT_CSC) ? " CSC" : "",
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(status & PORT_CONNECT) ? " CONNECT" : "");
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}
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#else
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static inline void __maybe_unused
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dbg_qh (char *label, struct ehci_hcd *ehci, struct ehci_qh *qh)
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{}
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static inline int __maybe_unused
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dbg_status_buf (char *buf, unsigned len, const char *label, u32 status)
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{ return 0; }
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static inline int __maybe_unused
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dbg_command_buf (char *buf, unsigned len, const char *label, u32 command)
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{ return 0; }
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static inline int __maybe_unused
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dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable)
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{ return 0; }
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static inline int __maybe_unused
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dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status)
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{ return 0; }
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#endif /* DEBUG */
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/* functions have the "wrong" filename when they're output... */
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#define dbg_status(ehci, label, status) { \
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char _buf [80]; \
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dbg_status_buf (_buf, sizeof _buf, label, status); \
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ehci_dbg (ehci, "%s\n", _buf); \
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}
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#define dbg_cmd(ehci, label, command) { \
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char _buf [80]; \
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dbg_command_buf (_buf, sizeof _buf, label, command); \
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ehci_dbg (ehci, "%s\n", _buf); \
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}
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#define dbg_port(ehci, label, port, status) { \
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char _buf [80]; \
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dbg_port_buf (_buf, sizeof _buf, label, port, status); \
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ehci_dbg (ehci, "%s\n", _buf); \
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}
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/*-------------------------------------------------------------------------*/
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#ifdef STUB_DEBUG_FILES
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static inline void create_debug_files (struct ehci_hcd *bus) { }
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static inline void remove_debug_files (struct ehci_hcd *bus) { }
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#else
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/* troubleshooting help: expose state in debugfs */
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static int debug_async_open(struct inode *, struct file *);
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static int debug_periodic_open(struct inode *, struct file *);
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static int debug_registers_open(struct inode *, struct file *);
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static int debug_async_open(struct inode *, struct file *);
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static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*);
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static int debug_close(struct inode *, struct file *);
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static const struct file_operations debug_async_fops = {
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.owner = THIS_MODULE,
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.open = debug_async_open,
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.read = debug_output,
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.release = debug_close,
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.llseek = default_llseek,
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};
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static const struct file_operations debug_periodic_fops = {
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.owner = THIS_MODULE,
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.open = debug_periodic_open,
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.read = debug_output,
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.release = debug_close,
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.llseek = default_llseek,
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};
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static const struct file_operations debug_registers_fops = {
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.owner = THIS_MODULE,
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.open = debug_registers_open,
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.read = debug_output,
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.release = debug_close,
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.llseek = default_llseek,
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};
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static struct dentry *ehci_debug_root;
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struct debug_buffer {
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ssize_t (*fill_func)(struct debug_buffer *); /* fill method */
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struct usb_bus *bus;
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struct mutex mutex; /* protect filling of buffer */
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size_t count; /* number of characters filled into buffer */
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char *output_buf;
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size_t alloc_size;
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};
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#define speed_char(info1) ({ char tmp; \
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switch (info1 & (3 << 12)) { \
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case QH_FULL_SPEED: tmp = 'f'; break; \
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case QH_LOW_SPEED: tmp = 'l'; break; \
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case QH_HIGH_SPEED: tmp = 'h'; break; \
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default: tmp = '?'; break; \
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}; tmp; })
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static inline char token_mark(struct ehci_hcd *ehci, __hc32 token)
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{
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__u32 v = hc32_to_cpu(ehci, token);
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if (v & QTD_STS_ACTIVE)
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return '*';
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if (v & QTD_STS_HALT)
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return '-';
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if (!IS_SHORT_READ (v))
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return ' ';
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/* tries to advance through hw_alt_next */
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return '/';
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}
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static void qh_lines (
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struct ehci_hcd *ehci,
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struct ehci_qh *qh,
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char **nextp,
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unsigned *sizep
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)
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{
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u32 scratch;
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u32 hw_curr;
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struct list_head *entry;
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struct ehci_qtd *td;
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unsigned temp;
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unsigned size = *sizep;
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char *next = *nextp;
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char mark;
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__le32 list_end = EHCI_LIST_END(ehci);
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struct ehci_qh_hw *hw = qh->hw;
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if (hw->hw_qtd_next == list_end) /* NEC does this */
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mark = '@';
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else
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mark = token_mark(ehci, hw->hw_token);
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if (mark == '/') { /* qh_alt_next controls qh advance? */
|
|
if ((hw->hw_alt_next & QTD_MASK(ehci))
|
|
== ehci->async->hw->hw_alt_next)
|
|
mark = '#'; /* blocked */
|
|
else if (hw->hw_alt_next == list_end)
|
|
mark = '.'; /* use hw_qtd_next */
|
|
/* else alt_next points to some other qtd */
|
|
}
|
|
scratch = hc32_to_cpup(ehci, &hw->hw_info1);
|
|
hw_curr = (mark == '*') ? hc32_to_cpup(ehci, &hw->hw_current) : 0;
|
|
temp = scnprintf (next, size,
|
|
"qh/%p dev%d %cs ep%d %08x %08x (%08x%c %s nak%d)",
|
|
qh, scratch & 0x007f,
|
|
speed_char (scratch),
|
|
(scratch >> 8) & 0x000f,
|
|
scratch, hc32_to_cpup(ehci, &hw->hw_info2),
|
|
hc32_to_cpup(ehci, &hw->hw_token), mark,
|
|
(cpu_to_hc32(ehci, QTD_TOGGLE) & hw->hw_token)
|
|
? "data1" : "data0",
|
|
(hc32_to_cpup(ehci, &hw->hw_alt_next) >> 1) & 0x0f);
|
|
size -= temp;
|
|
next += temp;
|
|
|
|
/* hc may be modifying the list as we read it ... */
|
|
list_for_each (entry, &qh->qtd_list) {
|
|
td = list_entry (entry, struct ehci_qtd, qtd_list);
|
|
scratch = hc32_to_cpup(ehci, &td->hw_token);
|
|
mark = ' ';
|
|
if (hw_curr == td->qtd_dma)
|
|
mark = '*';
|
|
else if (hw->hw_qtd_next == cpu_to_hc32(ehci, td->qtd_dma))
|
|
mark = '+';
|
|
else if (QTD_LENGTH (scratch)) {
|
|
if (td->hw_alt_next == ehci->async->hw->hw_alt_next)
|
|
mark = '#';
|
|
else if (td->hw_alt_next != list_end)
|
|
mark = '/';
|
|
}
|
|
temp = snprintf (next, size,
|
|
"\n\t%p%c%s len=%d %08x urb %p",
|
|
td, mark, ({ char *tmp;
|
|
switch ((scratch>>8)&0x03) {
|
|
case 0: tmp = "out"; break;
|
|
case 1: tmp = "in"; break;
|
|
case 2: tmp = "setup"; break;
|
|
default: tmp = "?"; break;
|
|
} tmp;}),
|
|
(scratch >> 16) & 0x7fff,
|
|
scratch,
|
|
td->urb);
|
|
if (size < temp)
|
|
temp = size;
|
|
size -= temp;
|
|
next += temp;
|
|
if (temp == size)
|
|
goto done;
|
|
}
|
|
|
|
temp = snprintf (next, size, "\n");
|
|
if (size < temp)
|
|
temp = size;
|
|
size -= temp;
|
|
next += temp;
|
|
|
|
done:
|
|
*sizep = size;
|
|
*nextp = next;
|
|
}
|
|
|
|
static ssize_t fill_async_buffer(struct debug_buffer *buf)
|
|
{
|
|
struct usb_hcd *hcd;
|
|
struct ehci_hcd *ehci;
|
|
unsigned long flags;
|
|
unsigned temp, size;
|
|
char *next;
|
|
struct ehci_qh *qh;
|
|
|
|
hcd = bus_to_hcd(buf->bus);
|
|
ehci = hcd_to_ehci (hcd);
|
|
next = buf->output_buf;
|
|
size = buf->alloc_size;
|
|
|
|
*next = 0;
|
|
|
|
/* dumps a snapshot of the async schedule.
|
|
* usually empty except for long-term bulk reads, or head.
|
|
* one QH per line, and TDs we know about
|
|
*/
|
|
spin_lock_irqsave (&ehci->lock, flags);
|
|
for (qh = ehci->async->qh_next.qh; size > 0 && qh; qh = qh->qh_next.qh)
|
|
qh_lines (ehci, qh, &next, &size);
|
|
if (!list_empty(&ehci->async_unlink) && size > 0) {
|
|
temp = scnprintf(next, size, "\nunlink =\n");
|
|
size -= temp;
|
|
next += temp;
|
|
|
|
list_for_each_entry(qh, &ehci->async_unlink, unlink_node) {
|
|
if (size <= 0)
|
|
break;
|
|
qh_lines(ehci, qh, &next, &size);
|
|
}
|
|
}
|
|
spin_unlock_irqrestore (&ehci->lock, flags);
|
|
|
|
return strlen(buf->output_buf);
|
|
}
|
|
|
|
#define DBG_SCHED_LIMIT 64
|
|
static ssize_t fill_periodic_buffer(struct debug_buffer *buf)
|
|
{
|
|
struct usb_hcd *hcd;
|
|
struct ehci_hcd *ehci;
|
|
unsigned long flags;
|
|
union ehci_shadow p, *seen;
|
|
unsigned temp, size, seen_count;
|
|
char *next;
|
|
unsigned i;
|
|
__hc32 tag;
|
|
|
|
if (!(seen = kmalloc (DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC)))
|
|
return 0;
|
|
seen_count = 0;
|
|
|
|
hcd = bus_to_hcd(buf->bus);
|
|
ehci = hcd_to_ehci (hcd);
|
|
next = buf->output_buf;
|
|
size = buf->alloc_size;
|
|
|
|
temp = scnprintf (next, size, "size = %d\n", ehci->periodic_size);
|
|
size -= temp;
|
|
next += temp;
|
|
|
|
/* dump a snapshot of the periodic schedule.
|
|
* iso changes, interrupt usually doesn't.
|
|
*/
|
|
spin_lock_irqsave (&ehci->lock, flags);
|
|
for (i = 0; i < ehci->periodic_size; i++) {
|
|
p = ehci->pshadow [i];
|
|
if (likely (!p.ptr))
|
|
continue;
|
|
tag = Q_NEXT_TYPE(ehci, ehci->periodic [i]);
|
|
|
|
temp = scnprintf (next, size, "%4d: ", i);
|
|
size -= temp;
|
|
next += temp;
|
|
|
|
do {
|
|
struct ehci_qh_hw *hw;
|
|
|
|
switch (hc32_to_cpu(ehci, tag)) {
|
|
case Q_TYPE_QH:
|
|
hw = p.qh->hw;
|
|
temp = scnprintf (next, size, " qh%d-%04x/%p",
|
|
p.qh->period,
|
|
hc32_to_cpup(ehci,
|
|
&hw->hw_info2)
|
|
/* uframe masks */
|
|
& (QH_CMASK | QH_SMASK),
|
|
p.qh);
|
|
size -= temp;
|
|
next += temp;
|
|
/* don't repeat what follows this qh */
|
|
for (temp = 0; temp < seen_count; temp++) {
|
|
if (seen [temp].ptr != p.ptr)
|
|
continue;
|
|
if (p.qh->qh_next.ptr) {
|
|
temp = scnprintf (next, size,
|
|
" ...");
|
|
size -= temp;
|
|
next += temp;
|
|
}
|
|
break;
|
|
}
|
|
/* show more info the first time around */
|
|
if (temp == seen_count) {
|
|
u32 scratch = hc32_to_cpup(ehci,
|
|
&hw->hw_info1);
|
|
struct ehci_qtd *qtd;
|
|
char *type = "";
|
|
|
|
/* count tds, get ep direction */
|
|
temp = 0;
|
|
list_for_each_entry (qtd,
|
|
&p.qh->qtd_list,
|
|
qtd_list) {
|
|
temp++;
|
|
switch (0x03 & (hc32_to_cpu(
|
|
ehci,
|
|
qtd->hw_token) >> 8)) {
|
|
case 0: type = "out"; continue;
|
|
case 1: type = "in"; continue;
|
|
}
|
|
}
|
|
|
|
temp = scnprintf (next, size,
|
|
" (%c%d ep%d%s "
|
|
"[%d/%d] q%d p%d)",
|
|
speed_char (scratch),
|
|
scratch & 0x007f,
|
|
(scratch >> 8) & 0x000f, type,
|
|
p.qh->usecs, p.qh->c_usecs,
|
|
temp,
|
|
0x7ff & (scratch >> 16));
|
|
|
|
if (seen_count < DBG_SCHED_LIMIT)
|
|
seen [seen_count++].qh = p.qh;
|
|
} else
|
|
temp = 0;
|
|
tag = Q_NEXT_TYPE(ehci, hw->hw_next);
|
|
p = p.qh->qh_next;
|
|
break;
|
|
case Q_TYPE_FSTN:
|
|
temp = scnprintf (next, size,
|
|
" fstn-%8x/%p", p.fstn->hw_prev,
|
|
p.fstn);
|
|
tag = Q_NEXT_TYPE(ehci, p.fstn->hw_next);
|
|
p = p.fstn->fstn_next;
|
|
break;
|
|
case Q_TYPE_ITD:
|
|
temp = scnprintf (next, size,
|
|
" itd/%p", p.itd);
|
|
tag = Q_NEXT_TYPE(ehci, p.itd->hw_next);
|
|
p = p.itd->itd_next;
|
|
break;
|
|
case Q_TYPE_SITD:
|
|
temp = scnprintf (next, size,
|
|
" sitd%d-%04x/%p",
|
|
p.sitd->stream->interval,
|
|
hc32_to_cpup(ehci, &p.sitd->hw_uframe)
|
|
& 0x0000ffff,
|
|
p.sitd);
|
|
tag = Q_NEXT_TYPE(ehci, p.sitd->hw_next);
|
|
p = p.sitd->sitd_next;
|
|
break;
|
|
}
|
|
size -= temp;
|
|
next += temp;
|
|
} while (p.ptr);
|
|
|
|
temp = scnprintf (next, size, "\n");
|
|
size -= temp;
|
|
next += temp;
|
|
}
|
|
spin_unlock_irqrestore (&ehci->lock, flags);
|
|
kfree (seen);
|
|
|
|
return buf->alloc_size - size;
|
|
}
|
|
#undef DBG_SCHED_LIMIT
|
|
|
|
static const char *rh_state_string(struct ehci_hcd *ehci)
|
|
{
|
|
switch (ehci->rh_state) {
|
|
case EHCI_RH_HALTED:
|
|
return "halted";
|
|
case EHCI_RH_SUSPENDED:
|
|
return "suspended";
|
|
case EHCI_RH_RUNNING:
|
|
return "running";
|
|
case EHCI_RH_STOPPING:
|
|
return "stopping";
|
|
}
|
|
return "?";
|
|
}
|
|
|
|
static ssize_t fill_registers_buffer(struct debug_buffer *buf)
|
|
{
|
|
struct usb_hcd *hcd;
|
|
struct ehci_hcd *ehci;
|
|
unsigned long flags;
|
|
unsigned temp, size, i;
|
|
char *next, scratch [80];
|
|
static char fmt [] = "%*s\n";
|
|
static char label [] = "";
|
|
|
|
hcd = bus_to_hcd(buf->bus);
|
|
ehci = hcd_to_ehci (hcd);
|
|
next = buf->output_buf;
|
|
size = buf->alloc_size;
|
|
|
|
spin_lock_irqsave (&ehci->lock, flags);
|
|
|
|
if (!HCD_HW_ACCESSIBLE(hcd)) {
|
|
size = scnprintf (next, size,
|
|
"bus %s, device %s\n"
|
|
"%s\n"
|
|
"SUSPENDED (no register access)\n",
|
|
hcd->self.controller->bus->name,
|
|
dev_name(hcd->self.controller),
|
|
hcd->product_desc);
|
|
goto done;
|
|
}
|
|
|
|
/* Capability Registers */
|
|
i = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
|
|
temp = scnprintf (next, size,
|
|
"bus %s, device %s\n"
|
|
"%s\n"
|
|
"EHCI %x.%02x, rh state %s\n",
|
|
hcd->self.controller->bus->name,
|
|
dev_name(hcd->self.controller),
|
|
hcd->product_desc,
|
|
i >> 8, i & 0x0ff, rh_state_string(ehci));
|
|
size -= temp;
|
|
next += temp;
|
|
|
|
#ifdef CONFIG_PCI
|
|
/* EHCI 0.96 and later may have "extended capabilities" */
|
|
if (hcd->self.controller->bus == &pci_bus_type) {
|
|
struct pci_dev *pdev;
|
|
u32 offset, cap, cap2;
|
|
unsigned count = 256/4;
|
|
|
|
pdev = to_pci_dev(ehci_to_hcd(ehci)->self.controller);
|
|
offset = HCC_EXT_CAPS(ehci_readl(ehci,
|
|
&ehci->caps->hcc_params));
|
|
while (offset && count--) {
|
|
pci_read_config_dword (pdev, offset, &cap);
|
|
switch (cap & 0xff) {
|
|
case 1:
|
|
temp = scnprintf (next, size,
|
|
"ownership %08x%s%s\n", cap,
|
|
(cap & (1 << 24)) ? " linux" : "",
|
|
(cap & (1 << 16)) ? " firmware" : "");
|
|
size -= temp;
|
|
next += temp;
|
|
|
|
offset += 4;
|
|
pci_read_config_dword (pdev, offset, &cap2);
|
|
temp = scnprintf (next, size,
|
|
"SMI sts/enable 0x%08x\n", cap2);
|
|
size -= temp;
|
|
next += temp;
|
|
break;
|
|
case 0: /* illegal reserved capability */
|
|
cap = 0;
|
|
/* FALLTHROUGH */
|
|
default: /* unknown */
|
|
break;
|
|
}
|
|
temp = (cap >> 8) & 0xff;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
// FIXME interpret both types of params
|
|
i = ehci_readl(ehci, &ehci->caps->hcs_params);
|
|
temp = scnprintf (next, size, "structural params 0x%08x\n", i);
|
|
size -= temp;
|
|
next += temp;
|
|
|
|
i = ehci_readl(ehci, &ehci->caps->hcc_params);
|
|
temp = scnprintf (next, size, "capability params 0x%08x\n", i);
|
|
size -= temp;
|
|
next += temp;
|
|
|
|
/* Operational Registers */
|
|
temp = dbg_status_buf (scratch, sizeof scratch, label,
|
|
ehci_readl(ehci, &ehci->regs->status));
|
|
temp = scnprintf (next, size, fmt, temp, scratch);
|
|
size -= temp;
|
|
next += temp;
|
|
|
|
temp = dbg_command_buf (scratch, sizeof scratch, label,
|
|
ehci_readl(ehci, &ehci->regs->command));
|
|
temp = scnprintf (next, size, fmt, temp, scratch);
|
|
size -= temp;
|
|
next += temp;
|
|
|
|
temp = dbg_intr_buf (scratch, sizeof scratch, label,
|
|
ehci_readl(ehci, &ehci->regs->intr_enable));
|
|
temp = scnprintf (next, size, fmt, temp, scratch);
|
|
size -= temp;
|
|
next += temp;
|
|
|
|
temp = scnprintf (next, size, "uframe %04x\n",
|
|
ehci_read_frame_index(ehci));
|
|
size -= temp;
|
|
next += temp;
|
|
|
|
for (i = 1; i <= HCS_N_PORTS (ehci->hcs_params); i++) {
|
|
temp = dbg_port_buf (scratch, sizeof scratch, label, i,
|
|
ehci_readl(ehci,
|
|
&ehci->regs->port_status[i - 1]));
|
|
temp = scnprintf (next, size, fmt, temp, scratch);
|
|
size -= temp;
|
|
next += temp;
|
|
if (i == HCS_DEBUG_PORT(ehci->hcs_params) && ehci->debug) {
|
|
temp = scnprintf (next, size,
|
|
" debug control %08x\n",
|
|
ehci_readl(ehci,
|
|
&ehci->debug->control));
|
|
size -= temp;
|
|
next += temp;
|
|
}
|
|
}
|
|
|
|
if (!list_empty(&ehci->async_unlink)) {
|
|
temp = scnprintf(next, size, "async unlink qh %p\n",
|
|
list_first_entry(&ehci->async_unlink,
|
|
struct ehci_qh, unlink_node));
|
|
size -= temp;
|
|
next += temp;
|
|
}
|
|
|
|
#ifdef EHCI_STATS
|
|
temp = scnprintf (next, size,
|
|
"irq normal %ld err %ld iaa %ld (lost %ld)\n",
|
|
ehci->stats.normal, ehci->stats.error, ehci->stats.iaa,
|
|
ehci->stats.lost_iaa);
|
|
size -= temp;
|
|
next += temp;
|
|
|
|
temp = scnprintf (next, size, "complete %ld unlink %ld\n",
|
|
ehci->stats.complete, ehci->stats.unlink);
|
|
size -= temp;
|
|
next += temp;
|
|
#endif
|
|
|
|
done:
|
|
spin_unlock_irqrestore (&ehci->lock, flags);
|
|
|
|
return buf->alloc_size - size;
|
|
}
|
|
|
|
static struct debug_buffer *alloc_buffer(struct usb_bus *bus,
|
|
ssize_t (*fill_func)(struct debug_buffer *))
|
|
{
|
|
struct debug_buffer *buf;
|
|
|
|
buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL);
|
|
|
|
if (buf) {
|
|
buf->bus = bus;
|
|
buf->fill_func = fill_func;
|
|
mutex_init(&buf->mutex);
|
|
buf->alloc_size = PAGE_SIZE;
|
|
}
|
|
|
|
return buf;
|
|
}
|
|
|
|
static int fill_buffer(struct debug_buffer *buf)
|
|
{
|
|
int ret = 0;
|
|
|
|
if (!buf->output_buf)
|
|
buf->output_buf = vmalloc(buf->alloc_size);
|
|
|
|
if (!buf->output_buf) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
ret = buf->fill_func(buf);
|
|
|
|
if (ret >= 0) {
|
|
buf->count = ret;
|
|
ret = 0;
|
|
}
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t debug_output(struct file *file, char __user *user_buf,
|
|
size_t len, loff_t *offset)
|
|
{
|
|
struct debug_buffer *buf = file->private_data;
|
|
int ret = 0;
|
|
|
|
mutex_lock(&buf->mutex);
|
|
if (buf->count == 0) {
|
|
ret = fill_buffer(buf);
|
|
if (ret != 0) {
|
|
mutex_unlock(&buf->mutex);
|
|
goto out;
|
|
}
|
|
}
|
|
mutex_unlock(&buf->mutex);
|
|
|
|
ret = simple_read_from_buffer(user_buf, len, offset,
|
|
buf->output_buf, buf->count);
|
|
|
|
out:
|
|
return ret;
|
|
|
|
}
|
|
|
|
static int debug_close(struct inode *inode, struct file *file)
|
|
{
|
|
struct debug_buffer *buf = file->private_data;
|
|
|
|
if (buf) {
|
|
vfree(buf->output_buf);
|
|
kfree(buf);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
static int debug_async_open(struct inode *inode, struct file *file)
|
|
{
|
|
file->private_data = alloc_buffer(inode->i_private, fill_async_buffer);
|
|
|
|
return file->private_data ? 0 : -ENOMEM;
|
|
}
|
|
|
|
static int debug_periodic_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct debug_buffer *buf;
|
|
buf = alloc_buffer(inode->i_private, fill_periodic_buffer);
|
|
if (!buf)
|
|
return -ENOMEM;
|
|
|
|
buf->alloc_size = (sizeof(void *) == 4 ? 6 : 8)*PAGE_SIZE;
|
|
file->private_data = buf;
|
|
return 0;
|
|
}
|
|
|
|
static int debug_registers_open(struct inode *inode, struct file *file)
|
|
{
|
|
file->private_data = alloc_buffer(inode->i_private,
|
|
fill_registers_buffer);
|
|
|
|
return file->private_data ? 0 : -ENOMEM;
|
|
}
|
|
|
|
static inline void create_debug_files (struct ehci_hcd *ehci)
|
|
{
|
|
struct usb_bus *bus = &ehci_to_hcd(ehci)->self;
|
|
|
|
ehci->debug_dir = debugfs_create_dir(bus->bus_name, ehci_debug_root);
|
|
if (!ehci->debug_dir)
|
|
return;
|
|
|
|
if (!debugfs_create_file("async", S_IRUGO, ehci->debug_dir, bus,
|
|
&debug_async_fops))
|
|
goto file_error;
|
|
|
|
if (!debugfs_create_file("periodic", S_IRUGO, ehci->debug_dir, bus,
|
|
&debug_periodic_fops))
|
|
goto file_error;
|
|
|
|
if (!debugfs_create_file("registers", S_IRUGO, ehci->debug_dir, bus,
|
|
&debug_registers_fops))
|
|
goto file_error;
|
|
|
|
return;
|
|
|
|
file_error:
|
|
debugfs_remove_recursive(ehci->debug_dir);
|
|
}
|
|
|
|
static inline void remove_debug_files (struct ehci_hcd *ehci)
|
|
{
|
|
debugfs_remove_recursive(ehci->debug_dir);
|
|
}
|
|
|
|
#endif /* STUB_DEBUG_FILES */
|