{"id":2223004,"url":"http://patchwork.ozlabs.org/api/patches/2223004/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260414080025.3005916-11-jamin_lin@aspeedtech.com/","project":{"id":14,"url":"http://patchwork.ozlabs.org/api/projects/14/?format=json","name":"QEMU Development","link_name":"qemu-devel","list_id":"qemu-devel.nongnu.org","list_email":"qemu-devel@nongnu.org","web_url":"","scm_url":"","webscm_url":"","list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20260414080025.3005916-11-jamin_lin@aspeedtech.com>","list_archive_url":null,"date":"2026-04-14T08:00:38","name":"[v2,10/17] hw/usb/hcd-ehci: Implement 64-bit qTD descriptor addressing","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"96ec54cffae83be300ce789f86c80f4e6523d07e","submitter":{"id":81768,"url":"http://patchwork.ozlabs.org/api/people/81768/?format=json","name":"Jamin Lin","email":"jamin_lin@aspeedtech.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260414080025.3005916-11-jamin_lin@aspeedtech.com/mbox/","series":[{"id":499795,"url":"http://patchwork.ozlabs.org/api/series/499795/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/list/?series=499795","date":"2026-04-14T08:00:26","name":"hw/usb/ehci: Add 64-bit descriptor addressing support","version":2,"mbox":"http://patchwork.ozlabs.org/series/499795/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2223004/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2223004/checks/","tags":{},"related":[],"headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=aspeedtech.com header.i=@aspeedtech.com\n header.a=rsa-sha256 header.s=selector1 header.b=jYZpsxi0;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; 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charset=\"iso-8859-1\"","Content-Transfer-Encoding":"quoted-printable","MIME-Version":"1.0","X-Exchange-RoutingPolicyChecked":"\n Rx0awyTsD2N6pii0+jPq5cCo7ZUEmEmezlNcKIOZGGFwzrTQn9wnoGRf47ex6gExmQU5TaAoL3IpqaZcIPnJlLWIjdZ+M8si86Z6bSzumQA+yPbxTQFLwrQFe1TGsh9nu/z+CpcG4pq5Wu3UixwEWEsOJJnBvoalTfIdZ99a6ta8j/EA9BMwBDodFiy/e3fb/CxFiMfHDrW9j4DZR5uXtd2q4pjhlxdIZKAKpaLMHG3bQ1JdhhIVuxLxbhp49NLyPiWLttd6P5daUepTCJ7WUEuyWUgfksZyJAkyxNwW+pJtsdYTkMmVeq4tMRpF5SXZkooQ4qLBzh+3oEbCMBzdAw==","X-OriginatorOrg":"aspeedtech.com","X-MS-Exchange-CrossTenant-AuthAs":"Internal","X-MS-Exchange-CrossTenant-AuthSource":"TYPPR06MB8206.apcprd06.prod.outlook.com","X-MS-Exchange-CrossTenant-Network-Message-Id":"\n a54e93b4-2270-45ce-0cb8-08de99fbeabe","X-MS-Exchange-CrossTenant-originalarrivaltime":"14 Apr 2026 08:00:38.1020 (UTC)","X-MS-Exchange-CrossTenant-fromentityheader":"Hosted","X-MS-Exchange-CrossTenant-id":"43d4aa98-e35b-4575-8939-080e90d5a249","X-MS-Exchange-CrossTenant-mailboxtype":"HOSTED","X-MS-Exchange-CrossTenant-userprincipalname":"\n xMKJneo8VjixtYtzFP6lQTrQ1lPzE4SN9rPMWK5ZyqR7xDxCJpsvI+SjSYz8CVC9Q0WXTi9DmQUDMbG8UgQVw3Iffj7iEfStsS2m+av9cMA=","X-MS-Exchange-Transport-CrossTenantHeadersStamped":"SI4PR06MB8423","Received-SPF":"pass client-ip=2a01:111:f403:c405::5;\n envelope-from=jamin_lin@aspeedtech.com;\n helo=TYPPR03CU001.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,\n DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n SPF_HELO_PASS=-0.001,\n 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":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org"},"content":"EHCI supports 64-bit addressing when the 64-bit Addressing Capability\nbit in HCCPARAMS is set. In that mode, the CTRLDSSEGMENT register\nprovides the upper 32 bits that are concatenated with 32-bit link\npointer values to form 64-bit control data structure addresses\n(EHCI 1.0, section 2.3.5 and Appendix B).\n\nqTD link pointers (current_qtd/next_qtd/altnext_qtd and qTD.next)\nare stored as 32-bit values in the data structures and must be\nexpanded to full 64-bit descriptor addresses when 64-bit mode is\nenabled. Update the qTD traversal paths to use ehci_get_desc_addr()\nwhen following link pointers.\n\nAppendix B also defines high dword fields for qTD buffer pointers.\nAdd bufptr_hi[5] to EHCIqtd and extend qTD fetch and QH overlay\nhandling to load and propagate the high buffer pointer fields.\n\nWhen 64-bit capability is disabled, descriptor and buffer addresses\nremain 32-bit and existing behaviour is unchanged.\n\nSigned-off-by: Jamin Lin \n---\n hw/usb/hcd-ehci.h | 1 +\n hw/usb/hcd-ehci.c | 19 ++++++++++++-------\n 2 files changed, 13 insertions(+), 7 deletions(-)","diff":"diff --git a/hw/usb/hcd-ehci.h b/hw/usb/hcd-ehci.h\nindex 773f376834..712de9d50e 100644\n--- a/hw/usb/hcd-ehci.h\n+++ b/hw/usb/hcd-ehci.h\n@@ -139,6 +139,7 @@ typedef struct EHCIqtd {\n uint32_t bufptr[5]; /* Standard buffer pointer */\n #define QTD_BUFPTR_MASK 0xfffff000\n #define QTD_BUFPTR_SH 12\n+ uint32_t bufptr_hi[5];\n } EHCIqtd;\n \n /* QH overlay: altnext_qtd, token, bufptr[5], bufptr_hi[5] */\ndiff --git a/hw/usb/hcd-ehci.c b/hw/usb/hcd-ehci.c\nindex d1d68b0342..5d070e204f 100644\n--- a/hw/usb/hcd-ehci.c\n+++ b/hw/usb/hcd-ehci.c\n@@ -473,7 +473,8 @@ static bool ehci_verify_qtd(EHCIPacket *p, EHCIqtd *qtd)\n (p->qtd.next != qtd->next)) ||\n (!NLPTR_TBIT(p->qtd.altnext) && (p->qtd.altnext != qtd->altnext)) ||\n p->qtd.token != qtd->token ||\n- p->qtd.bufptr[0] != qtd->bufptr[0]) {\n+ p->qtd.bufptr[0] != qtd->bufptr[0] ||\n+ p->qtd.bufptr_hi[0] != qtd->bufptr_hi[0]) {\n return false;\n } else {\n return true;\n@@ -1199,6 +1200,7 @@ static int ehci_qh_do_overlay(EHCIQueue *q)\n \n for (i = 0; i < 5; i++) {\n q->qh.bufptr[i] = p->qtd.bufptr[i];\n+ q->qh.bufptr_hi[i] = p->qtd.bufptr_hi[i];\n }\n \n if (!(q->qh.epchar & QH_EPCHAR_DTC)) {\n@@ -1232,7 +1234,8 @@ static int ehci_init_transfer(EHCIPacket *p)\n return -1;\n }\n \n- page = p->qtd.bufptr[cpage] & QTD_BUFPTR_MASK;\n+ page = ehci_get_buf_addr(p->queue->ehci, p->qtd.bufptr_hi[cpage],\n+ p->qtd.bufptr[cpage], QTD_BUFPTR_MASK);\n page += offset;\n plen = bytes;\n if (plen > 4096 - offset) {\n@@ -1726,7 +1729,7 @@ static EHCIQueue *ehci_state_fetchqh(EHCIState *ehci, int async)\n } else if ((q->qh.token & QTD_TOKEN_ACTIVE) &&\n (NLPTR_TBIT(q->qh.current_qtd) == 0) &&\n (q->qh.current_qtd != 0)) {\n- q->qtdaddr = q->qh.current_qtd;\n+ q->qtdaddr = ehci_get_desc_addr(ehci, q->qh.current_qtd);\n ehci_set_state(ehci, async, EST_FETCHQTD);\n \n } else {\n@@ -1798,14 +1801,14 @@ static int ehci_state_advqueue(EHCIQueue *q)\n */\n if (((q->qh.token & QTD_TOKEN_TBYTES_MASK) != 0) &&\n (NLPTR_TBIT(q->qh.altnext_qtd) == 0)) {\n- q->qtdaddr = q->qh.altnext_qtd;\n+ q->qtdaddr = ehci_get_desc_addr(q->ehci, q->qh.altnext_qtd);\n ehci_set_state(q->ehci, q->async, EST_FETCHQTD);\n \n /*\n * next qTD is valid\n */\n } else if (NLPTR_TBIT(q->qh.next_qtd) == 0) {\n- q->qtdaddr = q->qh.next_qtd;\n+ q->qtdaddr = ehci_get_desc_addr(q->ehci, q->qh.next_qtd);\n ehci_set_state(q->ehci, q->async, EST_FETCHQTD);\n \n /*\n@@ -1834,7 +1837,9 @@ static int ehci_state_fetchqtd(EHCIQueue *q)\n if (get_dwords(q->ehci, addr + 0, &qtd.next, 1) < 0 ||\n get_dwords(q->ehci, addr + 4, &qtd.altnext, 1) < 0 ||\n get_dwords(q->ehci, addr + 12, qtd.bufptr,\n- ARRAY_SIZE(qtd.bufptr)) < 0) {\n+ ARRAY_SIZE(qtd.bufptr)) < 0 ||\n+ get_dwords(q->ehci, addr + 32, qtd.bufptr_hi,\n+ ARRAY_SIZE(qtd.bufptr_hi)) < 0) {\n return 0;\n }\n ehci_trace_qtd(q, NLPTR_GET(q->qtdaddr), &qtd);\n@@ -1915,7 +1920,7 @@ static int ehci_fill_queue(EHCIPacket *p)\n if (NLPTR_TBIT(qtd.next) != 0) {\n break;\n }\n- qtdaddr = qtd.next;\n+ qtdaddr = ehci_get_desc_addr(q->ehci, qtd.next);\n /*\n * Detect circular td lists, Windows creates these, counting on the\n * active bit going low after execution to make the queue stop.\n","prefixes":["v2","10/17"]}