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Mon, 5 Oct 2026 06:44:30 +0000 From: Jamin Lin To: =?iso-8859-1?Q?C=E9dric_Le_Goater?= , Peter Maydell , Steven Lee , Troy Lee , Kane Chen , Andrew Jeffery , Joel Stanley , "open list:ASPEED BMCs" , "open list:All patches CC here" CC: Jamin Lin , Troy Lee Subject: [PATCH v2 09/11] hw/usb/aspeed-udc: Add trace events for the transfer paths Thread-Topic: [PATCH v2 09/11] hw/usb/aspeed-udc: Add trace events for the transfer paths Thread-Index: AQHdVJT4AGKsuUUpLEiyqf+2nPuDqA== Date: Mon, 5 Oct 2026 06:44:29 +0000 Message-ID: <20261005064418.3060881-10-jamin_lin@aspeedtech.com> References: <20261005064418.3060881-1-jamin_lin@aspeedtech.com> In-Reply-To: <20261005064418.3060881-1-jamin_lin@aspeedtech.com> Accept-Language: zh-TW, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: mx.microsoft.com 1; dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=aspeedtech.com; x-ms-publictraffictype: Email x-ms-traffictypediagnostic: SEZPR06MB7362:EE_|SI6PR06MB7166:EE_ x-ms-office365-filtering-correlation-id: 0bdb7efb-5372-4d59-2235-08df22ac1bcd x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0; 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envelope-from=jamin_lin@aspeedtech.com; helo=OS8PR02CU002.outbound.protection.outlook.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org The register traces show what the guest wrote, but not which transfer=0A= path the write chose, how much each call moved, or when the host gave up=0A= on a packet.=0A= =0A= Add one event per path, so the name says which path ran and a single=0A= path can be enabled on its own: a kick, a transfer result, and a=0A= cancelled packet.=0A= =0A= Signed-off-by: Jamin Lin =0A= ---=0A= hw/usb/aspeed-udc.c | 23 +++++++++++++++++++++++=0A= hw/usb/trace-events | 7 +++++++=0A= 2 files changed, 30 insertions(+)=0A= =0A= diff --git a/hw/usb/aspeed-udc.c b/hw/usb/aspeed-udc.c=0A= index 09f5913aef..1c99e45d9a 100644=0A= --- a/hw/usb/aspeed-udc.c=0A= +++ b/hw/usb/aspeed-udc.c=0A= @@ -565,6 +565,9 @@ static AspeedUDCXferResult aspeed_udc_ep_xfer_in_desc(A= speedUDCState *s,=0A= aspeed_udc_raise_ep_ack(s, ep);=0A= }=0A= =0A= + trace_aspeed_udc_ep_xfer_in_desc(ep, (uint32_t)p->actual_length,=0A= + done ? "done" : "more");=0A= +=0A= return done ? ASPEED_UDC_XFER_DONE : ASPEED_UDC_XFER_MORE;=0A= }=0A= =0A= @@ -606,6 +609,9 @@ static AspeedUDCXferResult aspeed_udc_ep_xfer_in_single= (AspeedUDCState *s,=0A= * buffer, and the next IN request sends the rest.=0A= */=0A= if (e->single_buf_off < buf_len) {=0A= + trace_aspeed_udc_ep_xfer_in_single(ep,=0A= + (uint32_t)p->actual_length,=0A= + "buffer left");=0A= return ASPEED_UDC_XFER_DONE;=0A= }=0A= =0A= @@ -619,6 +625,9 @@ static AspeedUDCXferResult aspeed_udc_ep_xfer_in_single= (AspeedUDCState *s,=0A= PROC_STS, EP_DMA_CTRL_STS_TX_IDLE)= ;=0A= aspeed_udc_raise_ep_ack(s, ep);=0A= =0A= + trace_aspeed_udc_ep_xfer_in_single(ep, (uint32_t)p->actual_length,=0A= + "done");=0A= +=0A= return ASPEED_UDC_XFER_DONE;=0A= }=0A= =0A= @@ -664,9 +673,15 @@ static AspeedUDCXferResult aspeed_udc_ep_xfer_out_sing= le(AspeedUDCState *s,=0A= aspeed_udc_raise_ep_ack(s, ep);=0A= =0A= if ((uint32_t)p->actual_length >=3D pktiov->size) {=0A= + trace_aspeed_udc_ep_xfer_out_single(ep,=0A= + (uint32_t)p->actual_length,=0A= + "done");=0A= return ASPEED_UDC_XFER_DONE;=0A= }=0A= =0A= + trace_aspeed_udc_ep_xfer_out_single(ep, (uint32_t)p->actual_length,=0A= + "more");=0A= +=0A= return ASPEED_UDC_XFER_MORE;=0A= }=0A= =0A= @@ -686,6 +701,8 @@ static void aspeed_udc_ep_in_kick_desc(AspeedUDCState *= s, int ep,=0A= uint32_t cur_rptr =3D FIELD_EX32(old_val, EP_DMA_STS, RPTR);=0A= USBPacket *p =3D e->pkt;=0A= =0A= + trace_aspeed_udc_ep_in_kick_desc(ep);=0A= +=0A= /*=0A= * A normal kick only sets the write pointer and leaves the read-point= er=0A= * field 0 (the read pointer is ours to advance). The guest resets the= ring=0A= @@ -735,6 +752,8 @@ static void aspeed_udc_ep_in_kick_single(AspeedUDCState= *s, int ep)=0A= AspeedUDCEP *e =3D &s->ep[ep];=0A= USBPacket *p =3D e->pkt;=0A= =0A= + trace_aspeed_udc_ep_in_kick_single(ep);=0A= +=0A= /* Do nothing if no host request is waiting, or no buffer was queued. = */=0A= if (!p || !FIELD_EX32(e->regs[R_EP_DMA_STS], EP_DMA_STS, WPTR)) {=0A= return;=0A= @@ -770,6 +789,8 @@ static void aspeed_udc_ep_out_kick_single(AspeedUDCStat= e *s, int ep)=0A= AspeedUDCEP *e =3D &s->ep[ep];=0A= USBPacket *p =3D e->pkt;=0A= =0A= + trace_aspeed_udc_ep_out_kick_single(ep);=0A= +=0A= /* nothing to do unless an OUT packet is waiting and a buffer is ready= */=0A= if (!p || !FIELD_EX32(e->regs[R_EP_DMA_STS], EP_DMA_STS, WPTR)) {=0A= return;=0A= @@ -1155,6 +1176,8 @@ static void aspeed_udc_gadget_cancel_packet(USBDevice= *udev, USBPacket *p)=0A= AspeedUDCState *s =3D ASPEED_UDC_GADGET(udev)->udc;=0A= int i;=0A= =0A= + trace_aspeed_udc_cancel_packet(p->ep->nr);=0A= +=0A= if (s->ep0_packet =3D=3D p) {=0A= s->ep0_packet =3D NULL;=0A= }=0A= diff --git a/hw/usb/trace-events b/hw/usb/trace-events=0A= index aa260dacad..661011b07e 100644=0A= --- a/hw/usb/trace-events=0A= +++ b/hw/usb/trace-events=0A= @@ -395,3 +395,10 @@ aspeed_udc_handle_data(int ep_nr, const char *dir, uin= t32_t iov, int ep_idx) "ep=0A= aspeed_udc_ep_data_in(unsigned ep, uint32_t rptr, uint32_t wptr, uint32_t = iov) "ep %u, rptr %u, wptr %u, iov %u"=0A= aspeed_udc_ep_data_out(unsigned ep, uint32_t wptr, uint32_t avail, uint32_= t iov) "ep %u, wptr %u, avail %u, iov %u"=0A= aspeed_udc_ep_ack(unsigned ep) "ep %u"=0A= +aspeed_udc_ep_in_kick_desc(int ep) "ep %d"=0A= +aspeed_udc_ep_in_kick_single(int ep) "ep %d"=0A= +aspeed_udc_ep_out_kick_single(int ep) "ep %d"=0A= +aspeed_udc_ep_xfer_in_desc(int ep, uint32_t sent, const char *res) "ep %d,= sent %u, %s"=0A= +aspeed_udc_ep_xfer_in_single(int ep, uint32_t sent, const char *res) "ep %= d, sent %u, %s"=0A= +aspeed_udc_ep_xfer_out_single(int ep, uint32_t received, const char *res) = "ep %d, received %u, %s"=0A= +aspeed_udc_cancel_packet(int ep) "ep %d"=0A= -- =0A= 2.43.0=0A=