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Wed, 11 Mar 2026 07:26:25 +0000 From: Jamin Lin To: =?iso-8859-1?Q?C=E9dric_Le_Goater?= , Peter Maydell , Steven Lee , Troy Lee , Andrew Jeffery , Joel Stanley , "open list:ASPEED BMCs" , "open list:All patches CC here" CC: Jamin Lin , Troy Lee , Kane Chen , "flwu@google.com" , "nabihestefan@google.com" Subject: [PATCH v1 08/13] hw/usb/hcd-ehci: Implement 64-bit qTD descriptor addressing Thread-Topic: [PATCH v1 08/13] hw/usb/hcd-ehci: Implement 64-bit qTD descriptor addressing Thread-Index: AQHcsSheGdSk5ZoVpU2+JxVB5IlC2w== Date: Wed, 11 Mar 2026 07:26:25 +0000 Message-ID: <20260311072614.1095587-9-jamin_lin@aspeedtech.com> References: <20260311072614.1095587-1-jamin_lin@aspeedtech.com> In-Reply-To: <20260311072614.1095587-1-jamin_lin@aspeedtech.com> Accept-Language: zh-TW, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=aspeedtech.com; x-ms-publictraffictype: Email x-ms-traffictypediagnostic: TYPPR06MB8206:EE_|SEYPR06MB6082:EE_ x-ms-office365-filtering-correlation-id: 235accb4-82c4-4429-2fe3-08de7f3f80e7 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-arm@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-arm-bounces+qemu-arm=archiver.kernel.org@nongnu.org Sender: qemu-arm-bounces+qemu-arm=archiver.kernel.org@nongnu.org EHCI supports 64-bit addressing when the 64-bit Addressing Capability=0A= bit in HCCPARAMS is set. In that mode, the CTRLDSSEGMENT register=0A= provides the upper 32 bits that are concatenated with 32-bit link=0A= pointer values to form 64-bit control data structure addresses=0A= (EHCI 1.0, section 2.3.5 and Appendix B).=0A= =0A= qTD link pointers (current_qtd/next_qtd/altnext_qtd and qTD.next)=0A= are stored as 32-bit values in the data structures and must be=0A= expanded to full 64-bit descriptor addresses when 64-bit mode is=0A= enabled. Update the qTD traversal paths to use ehci_get_desc_addr()=0A= when following link pointers.=0A= =0A= Appendix B also defines high dword fields for qTD buffer pointers.=0A= Add bufptr_hi[5] to EHCIqtd and extend qTD fetch and QH overlay=0A= handling to load and propagate the high buffer pointer fields.=0A= =0A= Introduce ehci_get_buf_addr() to construct full 64-bit buffer=0A= addresses from bufptr[] and bufptr_hi[] fields. Use this helper=0A= when calculating transfer buffer addresses so that data buffers=0A= above 4GB are correctly handled.=0A= =0A= When 64-bit capability is disabled, descriptor and buffer addresses=0A= remain 32-bit and existing behaviour is unchanged.=0A= =0A= Signed-off-by: Jamin Lin =0A= ---=0A= hw/usb/hcd-ehci.h | 1 +=0A= hw/usb/hcd-ehci.c | 32 +++++++++++++++++++++++++-------=0A= 2 files changed, 26 insertions(+), 7 deletions(-)=0A= =0A= diff --git a/hw/usb/hcd-ehci.h b/hw/usb/hcd-ehci.h=0A= index f18150c352..df16426f76 100644=0A= --- a/hw/usb/hcd-ehci.h=0A= +++ b/hw/usb/hcd-ehci.h=0A= @@ -149,6 +149,7 @@ typedef struct EHCIqtd {=0A= uint32_t bufptr[5]; /* Standard buffer pointer */=0A= #define QTD_BUFPTR_MASK 0xfffff000=0A= #define QTD_BUFPTR_SH 12=0A= + uint32_t bufptr_hi[5];=0A= } EHCIqtd;=0A= =0A= /*=0A= diff --git a/hw/usb/hcd-ehci.c b/hw/usb/hcd-ehci.c=0A= index 8fd3fd60c4..5964ede05b 100644=0A= --- a/hw/usb/hcd-ehci.c=0A= +++ b/hw/usb/hcd-ehci.c=0A= @@ -158,6 +158,19 @@ static uint64_t ehci_get_desc_addr(EHCIState *s, uint3= 2_t low)=0A= return addr;=0A= }=0A= =0A= +static uint64_t ehci_get_buf_addr(EHCIState *s, uint32_t hi, uint32_t low,= =0A= + uint32_t mask)=0A= +{=0A= + uint64_t addr;=0A= +=0A= + addr =3D (uint64_t)(low & mask);=0A= + if (s->caps_64bit_addr) {=0A= + addr |=3D (uint64_t)hi << 32;=0A= + }=0A= +=0A= + return addr;=0A= +}=0A= +=0A= static void ehci_trace_usbsts(uint32_t mask, int state)=0A= {=0A= /* interrupts */=0A= @@ -467,7 +480,8 @@ static bool ehci_verify_qtd(EHCIPacket *p, EHCIqtd *qtd= )=0A= (p->qtd.next !=3D qtd->next)) ||=0A= (!NLPTR_TBIT(p->qtd.altnext) && (p->qtd.altnext !=3D qtd->altnext)= ) ||=0A= p->qtd.token !=3D qtd->token ||=0A= - p->qtd.bufptr[0] !=3D qtd->bufptr[0]) {=0A= + p->qtd.bufptr[0] !=3D qtd->bufptr[0] ||=0A= + p->qtd.bufptr_hi[0] !=3D qtd->bufptr_hi[0]) {=0A= return false;=0A= } else {=0A= return true;=0A= @@ -1192,6 +1206,7 @@ static int ehci_qh_do_overlay(EHCIQueue *q)=0A= =0A= for (i =3D 0; i < 5; i++) {=0A= q->qh.bufptr[i] =3D p->qtd.bufptr[i];=0A= + q->qh.bufptr_hi[i] =3D p->qtd.bufptr_hi[i];=0A= }=0A= =0A= if (!(q->qh.epchar & QH_EPCHAR_DTC)) {=0A= @@ -1225,7 +1240,8 @@ static int ehci_init_transfer(EHCIPacket *p)=0A= return -1;=0A= }=0A= =0A= - page =3D p->qtd.bufptr[cpage] & QTD_BUFPTR_MASK;=0A= + page =3D ehci_get_buf_addr(p->queue->ehci, p->qtd.bufptr_hi[cpage]= ,=0A= + p->qtd.bufptr[cpage], QTD_BUFPTR_MASK);= =0A= page +=3D offset;=0A= plen =3D bytes;=0A= if (plen > 4096 - offset) {=0A= @@ -1720,7 +1736,7 @@ static EHCIQueue *ehci_state_fetchqh(EHCIState *ehci,= int async)=0A= } else if ((q->qh.token & QTD_TOKEN_ACTIVE) &&=0A= (NLPTR_TBIT(q->qh.current_qtd) =3D=3D 0) &&=0A= (q->qh.current_qtd !=3D 0)) {=0A= - q->qtdaddr =3D q->qh.current_qtd;=0A= + q->qtdaddr =3D ehci_get_desc_addr(ehci, q->qh.current_qtd);=0A= ehci_set_state(ehci, async, EST_FETCHQTD);=0A= =0A= } else {=0A= @@ -1804,14 +1820,14 @@ static int ehci_state_advqueue(EHCIQueue *q)=0A= */=0A= if (((q->qh.token & QTD_TOKEN_TBYTES_MASK) !=3D 0) &&=0A= (NLPTR_TBIT(q->qh.altnext_qtd) =3D=3D 0)) {=0A= - q->qtdaddr =3D q->qh.altnext_qtd;=0A= + q->qtdaddr =3D ehci_get_desc_addr(q->ehci, q->qh.altnext_qtd);=0A= ehci_set_state(q->ehci, q->async, EST_FETCHQTD);=0A= =0A= /*=0A= * next qTD is valid=0A= */=0A= } else if (NLPTR_TBIT(q->qh.next_qtd) =3D=3D 0) {=0A= - q->qtdaddr =3D q->qh.next_qtd;=0A= + q->qtdaddr =3D ehci_get_desc_addr(q->ehci, q->qh.next_qtd);=0A= ehci_set_state(q->ehci, q->async, EST_FETCHQTD);=0A= =0A= /*=0A= @@ -1840,7 +1856,9 @@ static int ehci_state_fetchqtd(EHCIQueue *q)=0A= if (get_dwords(q->ehci, addr + 0, &qtd.next, 1) < 0 ||=0A= get_dwords(q->ehci, addr + 4, &qtd.altnext, 1) < 0 ||=0A= get_dwords(q->ehci, addr + 12, qtd.bufptr,=0A= - ARRAY_SIZE(qtd.bufptr)) < 0) {=0A= + ARRAY_SIZE(qtd.bufptr)) < 0 ||=0A= + get_dwords(q->ehci, addr + 32, qtd.bufptr_hi,=0A= + ARRAY_SIZE(qtd.bufptr_hi)) < 0) {=0A= return 0;=0A= }=0A= ehci_trace_qtd(q, NLPTR_GET(q->qtdaddr), &qtd);=0A= @@ -1921,7 +1939,7 @@ static int ehci_fill_queue(EHCIPacket *p)=0A= if (NLPTR_TBIT(qtd.next) !=3D 0) {=0A= break;=0A= }=0A= - qtdaddr =3D qtd.next;=0A= + qtdaddr =3D ehci_get_desc_addr(q->ehci, qtd.next);=0A= /*=0A= * Detect circular td lists, Windows creates these, counting on th= e=0A= * active bit going low after execution to make the queue stop.=0A= -- =0A= 2.43.0=0A=