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GET /api/patches/2197135/?format=api
{ "id": 2197135, "url": "http://patchwork.ozlabs.org/api/patches/2197135/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260217080102.206581-8-sunlightlinux@gmail.com/", "project": { "id": 28, "url": "http://patchwork.ozlabs.org/api/projects/28/?format=api", "name": "Linux PCI development", "link_name": "linux-pci", "list_id": "linux-pci.vger.kernel.org", "list_email": "linux-pci@vger.kernel.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260217080102.206581-8-sunlightlinux@gmail.com>", "list_archive_url": null, "date": "2026-02-17T08:01:02", "name": "[RFC,3/3] PCI: Update bandwidth control and thermal cooling for Gen 7 (128 GT/s)", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "81ada3cbaa551537ba4904b7b976cf08aed32912", "submitter": { "id": 92653, "url": "http://patchwork.ozlabs.org/api/people/92653/?format=api", "name": "Ionut Nechita (Sunlight Linux)", "email": "sunlightlinux@gmail.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260217080102.206581-8-sunlightlinux@gmail.com/mbox/", "series": [ { "id": 492389, "url": "http://patchwork.ozlabs.org/api/series/492389/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/list/?series=492389", "date": "2026-02-17T08:00:56", "name": "PCI: Add PCIe Gen 7 (128 GT/s) speed support", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/492389/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2197135/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2197135/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linux-pci+bounces-47424-incoming=patchwork.ozlabs.org@vger.kernel.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linux-pci@vger.kernel.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20230601 header.b=EXR/Z1rL;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c15:e001:75::12fc:5321; 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Wysocki\" <rafael@kernel.org>,\n Daniel Lezcano <daniel.lezcano@linaro.org>", "Cc": "Zhang Rui <rui.zhang@intel.com>,\n\tLukasz Luba <lukasz.luba@arm.com>,\n\tLukas Wunner <lukas@wunner.de>,\n\tIonut Nechita <sunlightlinux@gmail.com>,\n\tlinux-pci@vger.kernel.org,\n\tlinux-pm@vger.kernel.org,\n\tlinux-kernel@vger.kernel.org,\n\tIonut Nechita <ionut_n2001@yahoo.com>", "Subject": "[RFC PATCH 3/3] PCI: Update bandwidth control and thermal cooling for\n Gen 7 (128 GT/s)", "Date": "Tue, 17 Feb 2026 10:01:02 +0200", "Message-ID": "<20260217080102.206581-8-sunlightlinux@gmail.com>", "X-Mailer": "git-send-email 2.53.0", "In-Reply-To": "<20260217080102.206581-2-sunlightlinux@gmail.com>", "References": "<20260217080102.206581-2-sunlightlinux@gmail.com>", "Precedence": "bulk", "X-Mailing-List": "linux-pci@vger.kernel.org", "List-Id": "<linux-pci.vger.kernel.org>", "List-Subscribe": "<mailto:linux-pci+subscribe@vger.kernel.org>", "List-Unsubscribe": "<mailto:linux-pci+unsubscribe@vger.kernel.org>", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=UTF-8", "Content-Transfer-Encoding": "8bit" }, "content": "From: Ionut Nechita <ionut_n2001@yahoo.com>\n\nUpdate PCIe subsystem components to support 128 GT/s link speed:\n\n - bwctrl: Extend pcie_valid_speed() range to PCIE_SPEED_128_0GT,\n add PCIE_SPEED_128_0GT to speed conversion table, widen\n supported_speeds variables from u8 to u16\n - portdrv: Switch hweight8() to hweight16() for supported_speeds\n to match the widened type\n - pcie_cooling: Add static_assert for PCIE_SPEED_128_0GT enum\n contiguity check\n\nSigned-off-by: Ionut Nechita <ionut_n2001@yahoo.com>\n---\n drivers/pci/pcie/bwctrl.c | 7 ++++---\n drivers/pci/pcie/portdrv.c | 2 +-\n drivers/thermal/pcie_cooling.c | 1 +\n 3 files changed, 6 insertions(+), 4 deletions(-)", "diff": "diff --git a/drivers/pci/pcie/bwctrl.c b/drivers/pci/pcie/bwctrl.c\nindex 36f939f23d34e..b9125b40cb860 100644\n--- a/drivers/pci/pcie/bwctrl.c\n+++ b/drivers/pci/pcie/bwctrl.c\n@@ -50,7 +50,7 @@ static DECLARE_RWSEM(pcie_bwctrl_setspeed_rwsem);\n \n static bool pcie_valid_speed(enum pci_bus_speed speed)\n {\n-\treturn (speed >= PCIE_SPEED_2_5GT) && (speed <= PCIE_SPEED_64_0GT);\n+\treturn (speed >= PCIE_SPEED_2_5GT) && (speed <= PCIE_SPEED_128_0GT);\n }\n \n static u16 pci_bus_speed2lnkctl2(enum pci_bus_speed speed)\n@@ -62,6 +62,7 @@ static u16 pci_bus_speed2lnkctl2(enum pci_bus_speed speed)\n \t\t[PCIE_SPEED_16_0GT] = PCI_EXP_LNKCTL2_TLS_16_0GT,\n \t\t[PCIE_SPEED_32_0GT] = PCI_EXP_LNKCTL2_TLS_32_0GT,\n \t\t[PCIE_SPEED_64_0GT] = PCI_EXP_LNKCTL2_TLS_64_0GT,\n+\t\t[PCIE_SPEED_128_0GT] = PCI_EXP_LNKCTL2_TLS_128_0GT,\n \t};\n \n \tif (WARN_ON_ONCE(!pcie_valid_speed(speed)))\n@@ -70,7 +71,7 @@ static u16 pci_bus_speed2lnkctl2(enum pci_bus_speed speed)\n \treturn speed_conv[speed];\n }\n \n-static inline u16 pcie_supported_speeds2target_speed(u8 supported_speeds)\n+static inline u16 pcie_supported_speeds2target_speed(u16 supported_speeds)\n {\n \treturn __fls(supported_speeds);\n }\n@@ -88,7 +89,7 @@ static inline u16 pcie_supported_speeds2target_speed(u8 supported_speeds)\n static u16 pcie_bwctrl_select_speed(struct pci_dev *port, enum pci_bus_speed speed_req)\n {\n \tstruct pci_bus *bus = port->subordinate;\n-\tu8 desired_speeds, supported_speeds;\n+\tu16 desired_speeds, supported_speeds;\n \tstruct pci_dev *dev;\n \n \tdesired_speeds = GENMASK(pci_bus_speed2lnkctl2(speed_req),\ndiff --git a/drivers/pci/pcie/portdrv.c b/drivers/pci/pcie/portdrv.c\nindex 38a41ccf79b9a..5ee8795107f26 100644\n--- a/drivers/pci/pcie/portdrv.c\n+++ b/drivers/pci/pcie/portdrv.c\n@@ -274,7 +274,7 @@ static int get_port_device_capability(struct pci_dev *dev)\n \n \t\tpcie_capability_read_dword(dev, PCI_EXP_LNKCAP, &linkcap);\n \t\tif (linkcap & PCI_EXP_LNKCAP_LBNC &&\n-\t\t hweight8(dev->supported_speeds) > 1)\n+\t\t hweight16(dev->supported_speeds) > 1)\n \t\t\tservices |= PCIE_PORT_SERVICE_BWCTRL;\n \t}\n \ndiff --git a/drivers/thermal/pcie_cooling.c b/drivers/thermal/pcie_cooling.c\nindex a876d64f15827..9a2e39398674b 100644\n--- a/drivers/thermal/pcie_cooling.c\n+++ b/drivers/thermal/pcie_cooling.c\n@@ -75,6 +75,7 @@ static_assert(PCIE_SPEED_5_0GT + 1 == PCIE_SPEED_8_0GT);\n static_assert(PCIE_SPEED_8_0GT + 1 == PCIE_SPEED_16_0GT);\n static_assert(PCIE_SPEED_16_0GT + 1 == PCIE_SPEED_32_0GT);\n static_assert(PCIE_SPEED_32_0GT + 1 == PCIE_SPEED_64_0GT);\n+static_assert(PCIE_SPEED_64_0GT + 1 == PCIE_SPEED_128_0GT);\n \n MODULE_AUTHOR(\"Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>\");\n MODULE_DESCRIPTION(\"PCIe cooling driver\");\n", "prefixes": [ "RFC", "3/3" ] }