From patchwork Fri Mar 5 09:02:51 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chunfeng Yun X-Patchwork-Id: 12118015 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2F497C43142 for ; Fri, 5 Mar 2021 09:04:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 122176502C for ; Fri, 5 Mar 2021 09:04:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229899AbhCEJDj (ORCPT ); Fri, 5 Mar 2021 04:03:39 -0500 Received: from mailgw02.mediatek.com ([210.61.82.184]:44286 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S229750AbhCEJDa (ORCPT ); Fri, 5 Mar 2021 04:03:30 -0500 X-UUID: 2e20b66eb714407682c3ce61bdd49e40-20210305 X-UUID: 2e20b66eb714407682c3ce61bdd49e40-20210305 Received: from mtkexhb02.mediatek.inc [(172.21.101.103)] by mailgw02.mediatek.com (envelope-from ) (Cellopoint E-mail Firewall v4.1.14 Build 0819 with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 196624933; Fri, 05 Mar 2021 17:03:26 +0800 Received: from MTKCAS06.mediatek.inc (172.21.101.30) by mtkmbs06n2.mediatek.inc (172.21.101.130) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 5 Mar 2021 17:03:24 +0800 Received: from localhost.localdomain (10.17.3.153) by MTKCAS06.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Fri, 5 Mar 2021 17:03:23 +0800 From: Chunfeng Yun To: Mathias Nyman , Greg Kroah-Hartman , Ikjoon Jang CC: Chunfeng Yun , Matthias Brugger , , , , , Nicolas Boichat , Eddie Hung Subject: [PATCH 13/17] usb: xhci-mtk: add some schedule error number Date: Fri, 5 Mar 2021 17:02:51 +0800 Message-ID: <1614934975-15188-13-git-send-email-chunfeng.yun@mediatek.com> X-Mailer: git-send-email 1.8.1.1.dirty In-Reply-To: <1614934975-15188-1-git-send-email-chunfeng.yun@mediatek.com> References: <1614934975-15188-1-git-send-email-chunfeng.yun@mediatek.com> MIME-Version: 1.0 X-TM-SNTS-SMTP: 0D830F8F09A60B82A58BC7E99A37A9D0A888F6BAFB3ED3632F38FC2BE88F6B312000:8 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org This is used to provide more information about which case causes bandwidth schedule failure. Signed-off-by: Chunfeng Yun --- drivers/usb/host/xhci-mtk-sch.c | 44 ++++++++++++++++++++++++++------- 1 file changed, 35 insertions(+), 9 deletions(-) diff --git a/drivers/usb/host/xhci-mtk-sch.c b/drivers/usb/host/xhci-mtk-sch.c index d39545ade9a1..deb918490b71 100644 --- a/drivers/usb/host/xhci-mtk-sch.c +++ b/drivers/usb/host/xhci-mtk-sch.c @@ -25,6 +25,13 @@ */ #define TT_MICROFRAMES_MAX 9 +/* schedule error type */ +#define ESCH_SS_Y6 1001 +#define ESCH_SS_OVERLAP 1002 +#define ESCH_CS_OVERFLOW 1003 +#define ESCH_BW_OVERFLOW 1004 +#define ESCH_FIXME 1005 + /* mtk scheduler bitmasks */ #define EP_BPKTS(p) ((p) & 0x7f) #define EP_BCSCOUNT(p) (((p) & 0x7) << 8) @@ -32,6 +39,24 @@ #define EP_BOFFSET(p) ((p) & 0x3fff) #define EP_BREPEAT(p) (((p) & 0x7fff) << 16) +static char *sch_error_string(int err_num) +{ + switch (err_num) { + case ESCH_SS_Y6: + return "Can't schedule Start-Split in Y6"; + case ESCH_SS_OVERLAP: + return "Can't find a suitable Start-Split location"; + case ESCH_CS_OVERFLOW: + return "The last Complete-Split is greater than 7"; + case ESCH_BW_OVERFLOW: + return "Bandwidth exceeds the maximum limit"; + case ESCH_FIXME: + return "FIXME, to be resolved"; + default: + return "Unknown"; + } +} + static int is_fs_or_ls(enum usb_device_speed speed) { return speed == USB_SPEED_FULL || speed == USB_SPEED_LOW; @@ -412,7 +437,7 @@ static int check_fs_bus_bw(struct mu3h_sch_ep_info *sch_ep, int offset) for (j = 0; j < sch_ep->cs_count; j++) { tmp = tt->fs_bus_bw[base + j] + sch_ep->bw_cost_per_microframe; if (tmp > FS_PAYLOAD_MAX) - return -ERANGE; + return -ESCH_BW_OVERFLOW; } } @@ -437,11 +462,11 @@ static int check_sch_tt(struct mu3h_sch_ep_info *sch_ep, u32 offset) * must never schedule Start-Split in Y6 */ if (!(start_ss == 7 || last_ss < 6)) - return -ERANGE; + return -ESCH_SS_Y6; for (i = 0; i < sch_ep->cs_count; i++) if (test_bit(offset + i, tt->ss_bit_map)) - return -ERANGE; + return -ESCH_SS_OVERLAP; } else { u32 cs_count = DIV_ROUND_UP(sch_ep->maxpkt, FS_PAYLOAD_MAX); @@ -451,14 +476,14 @@ static int check_sch_tt(struct mu3h_sch_ep_info *sch_ep, u32 offset) * must never schedule Start-Split in Y6 */ if (start_ss == 6) - return -ERANGE; + return -ESCH_SS_Y6; /* one uframe for ss + one uframe for idle */ start_cs = (start_ss + 2) % 8; last_cs = start_cs + cs_count - 1; if (last_cs > 7) - return -ERANGE; + return -ESCH_CS_OVERFLOW; if (sch_ep->ep_type == ISOC_IN_EP) extra_cs_count = (last_cs == 7) ? 1 : 2; @@ -470,7 +495,7 @@ static int check_sch_tt(struct mu3h_sch_ep_info *sch_ep, u32 offset) cs_count = 7; /* HW limit */ if (test_bit(offset, tt->ss_bit_map)) - return -ERANGE; + return -ESCH_SS_OVERLAP; sch_ep->cs_count = cs_count; /* one for ss, the other for idle */ @@ -562,7 +587,7 @@ static int check_sch_bw(struct mu3h_sch_bw_info *sch_bw, u32 esit_boundary; u32 min_num_budget; u32 min_cs_count; - int ret; + int ret = 0; /* * Search through all possible schedule microframes. @@ -597,7 +622,7 @@ static int check_sch_bw(struct mu3h_sch_bw_info *sch_bw, bw_boundary = get_bw_boundary(sch_ep->speed); /* check bandwidth */ if (min_bw > bw_boundary) - return -ERANGE; + return ret ? ret : -ESCH_BW_OVERFLOW; sch_ep->offset = min_index; sch_ep->cs_count = min_cs_count; @@ -765,7 +790,8 @@ int xhci_mtk_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev) ret = check_sch_bw(sch_bw, sch_ep); if (ret) { - xhci_err(xhci, "Not enough bandwidth!\n"); + xhci_err(xhci, "Not enough bandwidth! (%s)\n", + sch_error_string(-ret)); return -ENOSPC; } }