Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:2 as permitted sender) client-ip=2620:137:e000::3:2;
Received-SPF: Pass (protection.outlook.com: domain of cadence.com designates
 158.140.1.148 as permitted sender) receiver=protection.outlook.com;
 client-ip=158.140.1.148; helo=sjmaillnx2.cadence.com; pr=C
From:   Pawel Laszczak <pawell@cadence.com>
To:     <peter.chen@kernel.org>
CC:     <gregkh@linuxfoundation.org>, <linux-usb@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>, <pawell@cadence.com>
Subject: [PATCH] usb:cdnsp: remove TRB_FLUSH_ENDPOINT command
Date:   Fri, 20 Oct 2023 12:25:07 +0200
Message-ID: <20231020102507.90685-1-pawell@cadence.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Content-Type: text/plain
X-CrossPremisesHeadersFilteredBySendConnector: maileu5.global.cadence.com
X-OrganizationHeadersPreserved: maileu5.global.cadence.com
X-EOPAttributedMessage: 0
X-MS-PublicTrafficType: Email
X-MS-TrafficTypeDiagnostic: DM6NAM12FT030:EE_|MW4PR07MB9323:EE_
X-MS-Office365-Filtering-Correlation-Id: 4276c73b-1562-47c7-81dd-08dbdeef3888
X-MS-Exchange-SenderADCheck: 1
X-MS-Exchange-AntiSpam-Relay: 0
X-Microsoft-Antispam: BCL:0;
X-Microsoft-Antispam-Message-Info: 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
X-Forefront-Antispam-Report: CIP:158.140.1.148;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:sjmaillnx2.cadence.com;PTR:unknown.Cadence.COM;CAT:NONE;SFS:(13230031)(4636009)(346002)(39860400002)(136003)(396003)(376002)(230922051799003)(64100799003)(451199024)(186009)(1800799009)(82310400011)(46966006)(40470700004)(36840700001)(40480700001)(83380400001)(26005)(2616005)(478600001)(1076003)(336012)(426003)(107886003)(36756003)(40460700003)(82740400003)(356005)(86362001)(7636003)(2906002)(54906003)(36860700001)(6666004)(8676002)(42186006)(6916009)(8936002)(316002)(4326008)(47076005)(5660300002)(41300700001)(70206006)(70586007);DIR:OUT;SFP:1101;
X-OriginatorOrg: cadence.com
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Nov 2023 17:38:42.9139
 (UTC)
X-MS-Exchange-CrossTenant-Network-Message-Id: 4276c73b-1562-47c7-81dd-08dbdeef3888
X-MS-Exchange-CrossTenant-Id: d36035c5-6ce6-4662-a3dc-e762e61ae4c9
X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=d36035c5-6ce6-4662-a3dc-e762e61ae4c9;Ip=[158.140.1.148];Helo=[sjmaillnx2.cadence.com]
X-MS-Exchange-CrossTenant-AuthSource: DM6NAM12FT030.eop-nam12.prod.protection.outlook.com
X-MS-Exchange-CrossTenant-AuthAs: Anonymous
X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem
X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW4PR07MB9323
X-Proofpoint-ORIG-GUID: pcTeeBuA7q0SLODKEnukEG3n67xYhwUQ
X-Proofpoint-GUID: pcTeeBuA7q0SLODKEnukEG3n67xYhwUQ
X-Proofpoint-Virus-Version: vendor=baseguard
 engine=ICAP:2.0.272,Aquarius:18.0.987,Hydra:6.0.619,FMLib:17.11.176.26
 definitions=2023-11-06_13,2023-11-02_03,2023-05-22_02
X-Proofpoint-Spam-Details: rule=outbound_check_notspam policy=outbound_check score=0 phishscore=0
 clxscore=1015 impostorscore=0 priorityscore=1501 lowpriorityscore=0
 bulkscore=0 mlxscore=0 spamscore=0 mlxlogscore=760 malwarescore=0
 adultscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx
 scancount=1 engine=8.19.0-2310240000 definitions=main-2311060144
X-Spam-Status: No, score=-0.9 required=5.0 tests=DKIM_SIGNED,DKIM_VALID,
	DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,
	SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable
	autolearn_force=no version=3.4.6
X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on agentk.vger.email
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (agentk.vger.email [0.0.0.0]); Mon, 06 Nov 2023 09:39:31 -0800 (PST)

Patch removes TRB_FLUSH_ENDPOINT command from driver.
This command is not supported by controller and
USBSSP returns TRB Error completion code for it.

Signed-off-by: Pawel Laszczak <pawell@cadence.com>
---
 drivers/usb/cdns3/cdnsp-debug.h  |  3 ---
 drivers/usb/cdns3/cdnsp-gadget.c |  6 +-----
 drivers/usb/cdns3/cdnsp-gadget.h |  5 -----
 drivers/usb/cdns3/cdnsp-ring.c   | 24 ------------------------
 4 files changed, 1 insertion(+), 37 deletions(-)

diff --git a/drivers/usb/cdns3/cdnsp-debug.h b/drivers/usb/cdns3/cdnsp-debug.h
index f0ca865cce2a..ad617b7455b9 100644
--- a/drivers/usb/cdns3/cdnsp-debug.h
+++ b/drivers/usb/cdns3/cdnsp-debug.h
@@ -131,8 +131,6 @@ static inline const char *cdnsp_trb_type_string(u8 type)
 		return "Endpoint Not ready";
 	case TRB_HALT_ENDPOINT:
 		return "Halt Endpoint";
-	case TRB_FLUSH_ENDPOINT:
-		return "FLush Endpoint";
 	default:
 		return "UNKNOWN";
 	}
@@ -328,7 +326,6 @@ static inline const char *cdnsp_decode_trb(char *str, size_t size, u32 field0,
 		break;
 	case TRB_RESET_EP:
 	case TRB_HALT_ENDPOINT:
-	case TRB_FLUSH_ENDPOINT:
 		ret = snprintf(str, size,
 			       "%s: ep%d%s(%d) ctx %08x%08x slot %ld flags %c",
 			       cdnsp_trb_type_string(type),
diff --git a/drivers/usb/cdns3/cdnsp-gadget.c b/drivers/usb/cdns3/cdnsp-gadget.c
index 4b67749edb99..4a3f0f958256 100644
--- a/drivers/usb/cdns3/cdnsp-gadget.c
+++ b/drivers/usb/cdns3/cdnsp-gadget.c
@@ -1024,10 +1024,8 @@ static int cdnsp_gadget_ep_disable(struct usb_ep *ep)
 	pep->ep_state |= EP_DIS_IN_RROGRESS;
 
 	/* Endpoint was unconfigured by Reset Device command. */
-	if (!(pep->ep_state & EP_UNCONFIGURED)) {
+	if (!(pep->ep_state & EP_UNCONFIGURED))
 		cdnsp_cmd_stop_ep(pdev, pep);
-		cdnsp_cmd_flush_ep(pdev, pep);
-	}
 
 	/* Remove all queued USB requests. */
 	while (!list_empty(&pep->pending_list)) {
@@ -1424,8 +1422,6 @@ static void cdnsp_stop(struct cdnsp_device *pdev)
 {
 	u32 temp;
 
-	cdnsp_cmd_flush_ep(pdev, &pdev->eps[0]);
-
 	/* Remove internally queued request for ep0. */
 	if (!list_empty(&pdev->eps[0].pending_list)) {
 		struct cdnsp_request *req;
diff --git a/drivers/usb/cdns3/cdnsp-gadget.h b/drivers/usb/cdns3/cdnsp-gadget.h
index e1b5801fdddf..dbee6f085277 100644
--- a/drivers/usb/cdns3/cdnsp-gadget.h
+++ b/drivers/usb/cdns3/cdnsp-gadget.h
@@ -1128,8 +1128,6 @@ union cdnsp_trb {
 #define TRB_HALT_ENDPOINT	54
 /* Doorbell Overflow Event. */
 #define TRB_DRB_OVERFLOW	57
-/* Flush Endpoint Command. */
-#define TRB_FLUSH_ENDPOINT	58
 
 #define TRB_TYPE_LINK(x)	(((x) & TRB_TYPE_BITMASK) == TRB_TYPE(TRB_LINK))
 #define TRB_TYPE_LINK_LE32(x)	(((x) & cpu_to_le32(TRB_TYPE_BITMASK)) == \
@@ -1539,8 +1537,6 @@ void cdnsp_queue_configure_endpoint(struct cdnsp_device *pdev,
 void cdnsp_queue_reset_ep(struct cdnsp_device *pdev, unsigned int ep_index);
 void cdnsp_queue_halt_endpoint(struct cdnsp_device *pdev,
 			       unsigned int ep_index);
-void cdnsp_queue_flush_endpoint(struct cdnsp_device *pdev,
-				unsigned int ep_index);
 void cdnsp_force_header_wakeup(struct cdnsp_device *pdev, int intf_num);
 void cdnsp_queue_reset_device(struct cdnsp_device *pdev);
 void cdnsp_queue_new_dequeue_state(struct cdnsp_device *pdev,
@@ -1574,7 +1570,6 @@ void cdnsp_irq_reset(struct cdnsp_device *pdev);
 int cdnsp_halt_endpoint(struct cdnsp_device *pdev,
 			struct cdnsp_ep *pep, int value);
 int cdnsp_cmd_stop_ep(struct cdnsp_device *pdev, struct cdnsp_ep *pep);
-int cdnsp_cmd_flush_ep(struct cdnsp_device *pdev, struct cdnsp_ep *pep);
 void cdnsp_setup_analyze(struct cdnsp_device *pdev);
 int cdnsp_status_stage(struct cdnsp_device *pdev);
 int cdnsp_reset_device(struct cdnsp_device *pdev);
diff --git a/drivers/usb/cdns3/cdnsp-ring.c b/drivers/usb/cdns3/cdnsp-ring.c
index 07f6068342d4..af981778382d 100644
--- a/drivers/usb/cdns3/cdnsp-ring.c
+++ b/drivers/usb/cdns3/cdnsp-ring.c
@@ -2123,19 +2123,6 @@ int cdnsp_cmd_stop_ep(struct cdnsp_device *pdev, struct cdnsp_ep *pep)
 	return ret;
 }
 
-int cdnsp_cmd_flush_ep(struct cdnsp_device *pdev, struct cdnsp_ep *pep)
-{
-	int ret;
-
-	cdnsp_queue_flush_endpoint(pdev, pep->idx);
-	cdnsp_ring_cmd_db(pdev);
-	ret = cdnsp_wait_for_cmd_compl(pdev);
-
-	trace_cdnsp_handle_cmd_flush_ep(pep->out_ctx);
-
-	return ret;
-}
-
 /*
  * The transfer burst count field of the isochronous TRB defines the number of
  * bursts that are required to move all packets in this TD. Only SuperSpeed
@@ -2465,17 +2452,6 @@ void cdnsp_queue_halt_endpoint(struct cdnsp_device *pdev, unsigned int ep_index)
 			    EP_ID_FOR_TRB(ep_index));
 }
 
-/*
- * Queue a flush endpoint request on the command ring.
- */
-void  cdnsp_queue_flush_endpoint(struct cdnsp_device *pdev,
-				 unsigned int ep_index)
-{
-	cdnsp_queue_command(pdev, 0, 0, 0, TRB_TYPE(TRB_FLUSH_ENDPOINT) |
-			    SLOT_ID_FOR_TRB(pdev->slot_id) |
-			    EP_ID_FOR_TRB(ep_index));
-}
-
 void cdnsp_force_header_wakeup(struct cdnsp_device *pdev, int intf_num)
 {
 	u32 lo, mid;
-- 
2.25.1