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GET /api/patches/2222997/?format=api
{ "id": 2222997, "url": "http://patchwork.ozlabs.org/api/patches/2222997/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260414080025.3005916-12-jamin_lin@aspeedtech.com/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/projects/14/?format=api", "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": "<20260414080025.3005916-12-jamin_lin@aspeedtech.com>", "list_archive_url": null, "date": "2026-04-14T08:00:39", "name": "[v2,11/17] hw/usb/hcd-ehci: Implement 64-bit iTD descriptor addressing", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "7ce861f2cd09dd441115df05e92d36a5a9b11873", "submitter": { "id": 81768, "url": "http://patchwork.ozlabs.org/api/people/81768/?format=api", "name": "Jamin Lin", "email": "jamin_lin@aspeedtech.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260414080025.3005916-12-jamin_lin@aspeedtech.com/mbox/", "series": [ { "id": 499795, "url": "http://patchwork.ozlabs.org/api/series/499795/?format=api", "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/2222997/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2222997/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "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=ktvScOWa;\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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a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com;\n s=arcselector10001;\n h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1;\n bh=vuWKDDsk6LX2zEwkIhjM2Aljgzp3WQcUCNwUlAYTDws=;\n b=NciMAIUM0P5wOE7ZkPzEStH70ZUSgHG548tvXJCFemSK3kCk4m4LLerKJlWD4lDeYsn7oPWFGXKccf0/yuB/0v2quG+oyhR4O0axRHEW4AQwX/KGeUrw43EGXM5R1YRTtZ6OsyWI9higoUjgYi7Q+ox9++o9OiDJqdM5yk5lOTIO3Yz+NwA1YfAzcKWdMNSN7ai40QdtozJICcbl9E/D0NNo/+FDiBHHhv4sdgRmRjD24edtIq6y/GLfiu9JdUszo6l2rhIEajYsgaG5OcbCLSq0CcFS2LRl9t0HErRixBWtqccDnjFErcgpLxCo8J5e35soIBx3Alu7ZVJftBAXiA==", "ARC-Authentication-Results": "i=1; mx.microsoft.com 1; spf=pass\n smtp.mailfrom=aspeedtech.com; dmarc=pass action=none\n header.from=aspeedtech.com; dkim=pass header.d=aspeedtech.com; arc=none", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=aspeedtech.com;\n s=selector1;\n h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck;\n bh=vuWKDDsk6LX2zEwkIhjM2Aljgzp3WQcUCNwUlAYTDws=;\n b=ktvScOWaKO0tgL0nwjp7p367v+VRg9T1xgvn8ohA2F6oyFciO+GMZq3ASoGw5T+05Cqp6r1SrYeY8PDZecmTL3lbA/DCpRvT1cdDVe23Tx27ofNkXt6wSzSF8BMqxzaw004bRIRlb/+ChPUfbIAeLeHl+cdMH2aFoX7KOFKKJhO0vSpavVi6s7ZRvzgfVOWZtHPmI1Q1dPyov6FqbxfM4mbz2VisjxCEm62vtxrn1G6Mj5PKcXDsRYsbSYXP6QfEjZwSq0ACQkefhJJv5yFHEDG3enOBRR4uztCbmE+AorvRr0wXyTXtoBH6raf3X7OlFQT5zv+IAe/Wsa/MMx1icA==", "From": "Jamin Lin <jamin_lin@aspeedtech.com>", "To": "=?iso-8859-1?q?C=E9dric_Le_Goater?= <clg@kaod.org>,\n Peter Maydell <peter.maydell@linaro.org>,\n Steven Lee <steven_lee@aspeedtech.com>, Troy Lee <leetroy@gmail.com>,\n Kane Chen <kane_chen@aspeedtech.com>,\n Andrew Jeffery <andrew@codeconstruct.com.au>, Joel Stanley <joel@jms.id.au>,\n \"open list:ASPEED BMCs\" <qemu-arm@nongnu.org>,\n \"open list:All patches CC here\" <qemu-devel@nongnu.org>", "CC": "Jamin Lin <jamin_lin@aspeedtech.com>, Troy Lee <troy_lee@aspeedtech.com>,\n \"flwu@google.com\" <flwu@google.com>, \"nabihestefan@google.com\"\n <nabihestefan@google.com>", "Subject": "[PATCH v2 11/17] hw/usb/hcd-ehci: Implement 64-bit iTD descriptor\n addressing", "Thread-Topic": "[PATCH v2 11/17] hw/usb/hcd-ehci: Implement 64-bit iTD\n descriptor addressing", "Thread-Index": "AQHcy+TIqGBEg6o9N0ylzvr2+zYkwg==", "Date": "Tue, 14 Apr 2026 08:00:39 +0000", "Message-ID": "<20260414080025.3005916-12-jamin_lin@aspeedtech.com>", "References": "<20260414080025.3005916-1-jamin_lin@aspeedtech.com>", "In-Reply-To": "<20260414080025.3005916-1-jamin_lin@aspeedtech.com>", "Accept-Language": "zh-TW, en-US", "Content-Language": "en-US", "X-MS-Has-Attach": "", "X-MS-TNEF-Correlator": "", "authentication-results": [ "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=ktvScOWa;\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 nG97YbWyHEXIKPZE2cmm3bQQ8/WzVZlqWvufYIahAafRD4b1FU1Cl8VTDURd8eYc8Jsui1UmEJGcEB5QoDWCph/HrIfE39fbshEqsTxAUrg/S7SWm+bNQ7gnfggffixmJm1UT/GQt+lY4z85dt/2N5iwa2Qel4LOv17RF5zs8zSr6yP46RE3+uZFl7Dgcevy9W0+VUu0EnhnxvoIr+fxI5ReNuVQShAloU1G2lcycm3+F5ayRcS73o4N/HChumYv+r01hX420OM0d7NXUhWRgqJejNiBgLlY7RxoG7Ix5Pg7R+WdHe5Df5s8AacBKo4aS5CeDMBGE48q7VQJLXZmow==", "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 b58410ad-8e2e-4287-1483-08de99fbeb11", "X-MS-Exchange-CrossTenant-originalarrivaltime": "14 Apr 2026 08:00:39.2124 (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 DLRAwxUlgi1mHmvhaeeO2gh1tsp8au1lapBZjHZu8t0sldd8iorz3GHklqNraJhQgWcaTxwON8oTbeYLALrVc/a8X5faCy3mQTkEhenNacI=", "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 <qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<https://lists.nongnu.org/archive/html/qemu-devel>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "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 control data structure addressing when the\n64-bit Addressing Capability bit in HCCPARAMS is set. In that mode,\nthe CTRLDSSEGMENT register provides the upper 32 bits that are\nconcatenated with 32-bit link pointer values to form full 64-bit\ndescriptor addresses (EHCI 1.0, section 2.3.5 and Appendix B).\n\niTD link pointers are stored as 32-bit values and must be expanded\nto full 64-bit descriptor addresses when 64-bit mode is enabled.\nUpdate the iTD traversal path to use ehci_get_desc_addr() when\nfollowing link pointers.\n\nAppendix B also defines high dword fields for iTD buffer pointers.\nAdd bufptr_hi[7] to EHCIitd and use ehci_get_buf_addr() to construct\nfull 64-bit buffer addresses from bufptr[] and bufptr_hi[] fields\nwhen processing isochronous transfers. This allows buffers above\n4GB to be handled correctly.\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 <jamin_lin@aspeedtech.com>\n---\n hw/usb/hcd-ehci.h | 1 +\n hw/usb/hcd-ehci.c | 9 ++++++---\n 2 files changed, 7 insertions(+), 3 deletions(-)", "diff": "diff --git a/hw/usb/hcd-ehci.h b/hw/usb/hcd-ehci.h\nindex 712de9d50e..af8c080c60 100644\n--- a/hw/usb/hcd-ehci.h\n+++ b/hw/usb/hcd-ehci.h\n@@ -63,6 +63,7 @@ typedef struct EHCIitd {\n #define ITD_BUFPTR_MAXPKT_SH 0\n #define ITD_BUFPTR_MULT_MASK 0x00000003\n #define ITD_BUFPTR_MULT_SH 0\n+ uint32_t bufptr_hi[7];\n } EHCIitd;\n \n /*\ndiff --git a/hw/usb/hcd-ehci.c b/hw/usb/hcd-ehci.c\nindex 5d070e204f..5d61b1dd64 100644\n--- a/hw/usb/hcd-ehci.c\n+++ b/hw/usb/hcd-ehci.c\n@@ -1463,7 +1463,8 @@ static int ehci_process_itd(EHCIState *ehci,\n return -1;\n }\n \n- ptr1 = (itd->bufptr[pg] & ITD_BUFPTR_MASK);\n+ ptr1 = ehci_get_buf_addr(ehci, itd->bufptr_hi[pg],\n+ itd->bufptr[pg], ITD_BUFPTR_MASK);\n qemu_sglist_init(&ehci->isgl, ehci->device, 2, ehci->as);\n if (off + len > 4096) {\n /* transfer crosses page border */\n@@ -1471,7 +1472,9 @@ static int ehci_process_itd(EHCIState *ehci,\n qemu_sglist_destroy(&ehci->isgl);\n return -1; /* avoid page pg + 1 */\n }\n- ptr2 = (itd->bufptr[pg + 1] & ITD_BUFPTR_MASK);\n+ ptr2 = ehci_get_buf_addr(ehci, itd->bufptr_hi[pg + 1],\n+ itd->bufptr[pg + 1],\n+ ITD_BUFPTR_MASK);\n uint32_t len2 = off + len - 4096;\n uint32_t len1 = len - len2;\n qemu_sglist_add(&ehci->isgl, ptr1 + off, len1);\n@@ -1761,7 +1764,7 @@ static int ehci_state_fetchitd(EHCIState *ehci, int async)\n \n put_dwords(ehci, NLPTR_GET(entry), (uint32_t *) &itd,\n sizeof(EHCIitd) >> 2);\n- ehci_set_fetch_addr(ehci, async, itd.next);\n+ ehci_set_fetch_addr(ehci, async, ehci_get_desc_addr(ehci, itd.next));\n ehci_set_state(ehci, async, EST_FETCHENTRY);\n \n return 1;\n", "prefixes": [ "v2", "11/17" ] }