From patchwork Tue Feb 13 00:53:39 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wesley Cheng X-Patchwork-Id: 13554323 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CD7C41EF13; Tue, 13 Feb 2024 00:54:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.180.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707785696; cv=none; b=lMDhkmjKRSdurq5nn7P8CbTEiz1425T90cAWZgxikKZrVrQ1ZJdDx2LBz/fs2Ld17zjwt4wv/OViBdbDRIqXpD/GEi7WoMXlhGzIj7iLMYksKPbidcZlbnuvpWoPpTjGz0XdmreK5K+OILQfZXGFzVbRY8FFuY12lonMY8oRuAU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707785696; c=relaxed/simple; bh=httnPJJML5QlmnUl6L9g9SMmpTEhPWJw3rWiUQwkot4=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=OSz+afFxEz18jx04RDhrcjwDHxhPQ9d/2y9cdzIsM7D5C298OQV2RF7+XPsg8DcCCROn6pw0Songx5x+PZvq1rWvl3hOsmWLL5hrsyJAxvfvuPMbkijjhPDpkxSOJRzmob1rRsNQD5fSAEiJSUPmLtytbTPuuA9O1TLK41PJ6LQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com; spf=pass smtp.mailfrom=quicinc.com; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b=fWtEtV8o; arc=none smtp.client-ip=205.220.180.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=quicinc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="fWtEtV8o" Received: from pps.filterd (m0279871.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.24/8.17.1.24) with ESMTP id 41CNlaHD015770; Tue, 13 Feb 2024 00:54:36 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-type; s=qcppdkim1; bh=v2ItLrNtk2j1QY1c2ABM 7WgcR1ha0sOr3zVlmeNNouY=; b=fWtEtV8oSPZ8wnr1AHYQjQ7qff+uXxHp0Fs3 FJk17PGQDk0GiPJjduppdqCCv+V8ZKMM4rQUbIx9unJ/1SA5nD+p60R9gP3dP/dX KsBhO/OslHj11i0Zyr5IykwFUZq44Rz53Vi2iNZKg3kudhWZv58SWxF209tYswSd gMhzdrNHvvN5AQJW7vm6B9aAV7QKPa6yRfIJxUjVio2sz42+OYoQ3Yy3uWvSYgOb J7jm5x0Y0H53MUSjXkSkQLplly6/WJmmTKwYTM2oQTsjA9J0Rezpc/GwgDcXbSHo 8JQLgHjsqn5RmliX4j2ed+SQOJ80EufX0Na8/AnM7/P6Yvwutg== Received: from nalasppmta05.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3w7gvjhuwx-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 13 Feb 2024 00:54:35 +0000 (GMT) Received: from nalasex01b.na.qualcomm.com (nalasex01b.na.qualcomm.com [10.47.209.197]) by NALASPPMTA05.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 41D0sY2X026772 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 13 Feb 2024 00:54:35 GMT Received: from hu-wcheng-lv.qualcomm.com (10.49.16.6) by nalasex01b.na.qualcomm.com (10.47.209.197) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Mon, 12 Feb 2024 16:54:34 -0800 From: Wesley Cheng To: , , , , , , , , , , , , , , CC: , , , , , , , Mathias Nyman , Wesley Cheng Subject: [PATCH v15 07/50] xhci: add helper that checks for unhandled events on a event ring Date: Mon, 12 Feb 2024 16:53:39 -0800 Message-ID: <20240213005422.3121-8-quic_wcheng@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20240213005422.3121-1-quic_wcheng@quicinc.com> References: <20240213005422.3121-1-quic_wcheng@quicinc.com> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: nalasex01b.na.qualcomm.com (10.47.209.197) To nalasex01b.na.qualcomm.com (10.47.209.197) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: KGBhyYkqqUhxvsgctafNYaxkd-P5tWpn X-Proofpoint-ORIG-GUID: KGBhyYkqqUhxvsgctafNYaxkd-P5tWpn X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-02-12_20,2024-02-12_03,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 phishscore=0 suspectscore=0 spamscore=0 mlxscore=0 lowpriorityscore=0 priorityscore=1501 impostorscore=0 mlxlogscore=999 adultscore=0 bulkscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2401310000 definitions=main-2402130004 From: Mathias Nyman Add unhandled_event_trb() that returns true in case xHC hardware has written new event trbs to the event ring that driver has not yet handled. Signed-off-by: Mathias Nyman Signed-off-by: Wesley Cheng --- drivers/usb/host/xhci-ring.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index 338b6fddedc3..48388bc16b24 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -113,6 +113,12 @@ static bool last_td_in_urb(struct xhci_td *td) return urb_priv->num_tds_done == urb_priv->num_tds; } +static bool unhandled_event_trb(struct xhci_ring *ring) +{ + return ((le32_to_cpu(ring->dequeue->event_cmd.flags) & TRB_CYCLE) == + ring->cycle_state); +} + static void inc_td_cnt(struct urb *urb) { struct urb_priv *urb_priv = urb->hcpriv; @@ -2923,9 +2929,8 @@ static int xhci_handle_event(struct xhci_hcd *xhci, struct xhci_interrupter *ir) } event = ir->event_ring->dequeue; - /* Does the HC or OS own the TRB? */ - if ((le32_to_cpu(event->event_cmd.flags) & TRB_CYCLE) != - ir->event_ring->cycle_state) + + if (!unhandled_event_trb(ir->event_ring)) return 0; trace_xhci_handle_event(ir->event_ring, &event->generic);