From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id E634A2EE616 for ; Fri, 22 Aug 2025 09:49:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=114.242.206.163 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755856205; cv=none; b=bBrclrSrOaaKQN0rgsMhi+FsGyHXIrR6M5c0W63RXgHpXQm4ZgQFnojR6gxqLlZupMOB4NGn8NXvX/3yutnud2Q5dd6LlrsK0wFhWzGSp/mWpQXGG+Qd/CfvKbLTLXqeH0qqc7OHQt9N6P9vHrmOwUpKFeMSfOZ/q1iWye7/a9U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755856205; c=relaxed/simple; bh=JB7KGCS3RSEBAwbSXTDUKz+mJAcPF8RfCSj+FWVoNXU=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=QnFhP84uXh2dHejdNW/INBoYFLpwzou8DbAprKiRtbgQx4WmVzXM6PblsK/yeznTkKetWlbTbEmoVIdga5sIhAm1VDE2vnjZc83RmfISEaT6TcFLbGsfthz2bvzzEj9nzkKoVGUnoLjbQCalC7OXI0LnuI/Ku/nrQDTh4FbeinI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn; spf=pass smtp.mailfrom=loongson.cn; arc=none smtp.client-ip=114.242.206.163 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=loongson.cn Received: from loongson.cn (unknown [223.64.68.89]) by gateway (Coremail) with SMTP id _____8Dxfb8xPahoBO4BAA--.2592S3; Fri, 22 Aug 2025 17:49:37 +0800 (CST) Received: from localhost.localdomain (unknown [223.64.68.89]) by front1 (Coremail) with SMTP id qMiowJAxfcEsPahoGeVfAA--.44506S2; Fri, 22 Aug 2025 17:49:35 +0800 (CST) From: Binbin Zhou To: Binbin Zhou , Huacai Chen , Lee Jones , Corey Minyard Cc: Huacai Chen , Xuerui Wang , loongarch@lists.linux.dev, linux-kernel@vger.kernel.org, openipmi-developer@lists.sourceforge.net, jeffbai@aosc.io, kexybiscuit@aosc.io, wangyao@lemote.com, Binbin Zhou Subject: [PATCH v10 0/3] LoongArch: Add Loongson-2K BMC support Date: Fri, 22 Aug 2025 17:49:22 +0800 Message-ID: X-Mailer: git-send-email 2.47.3 Precedence: bulk X-Mailing-List: loongarch@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID:qMiowJAxfcEsPahoGeVfAA--.44506S2 X-CM-SenderInfo: p2kr3uplqex0o6or00hjvr0hdfq/ X-Coremail-Antispam: 1Uk129KBj93XoWxuFyxtFyxZF1fuF47Wr15Awc_yoW7Zr4rpa 15ursxCr1DKF1xJrZ3Cw1fuFyYga95Ja4agF17A345uF4UC3WjyrWFka15XFy7AFWkKryI qrs3ZF1Ska45urXCm3ZEXasCq-sJn29KB7ZKAUJUUUUr529EdanIXcx71UUUUU7KY7ZEXa sCq-sGcSsGvfJ3Ic02F40EFcxC0VAKzVAqx4xG6I80ebIjqfuFe4nvWSU5nxnvy29KBjDU 0xBIdaVrnRJUUUBjb4IE77IF4wAFF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2 IYs7xG6rWj6s0DM7CIcVAFz4kK6r1Y6r17M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48v e4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_Gr0_Xr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI 0_Gr0_Cr1l84ACjcxK6I8E87Iv67AKxVW0oVCq3wA2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_ GcCE3s1ln4kS14v26r1Y6r17M2AIxVAIcxkEcVAq07x20xvEncxIr21l57IF6xkI12xvs2 x26I8E6xACxx1l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjxv20xvE14v26r1Y6r17 McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr0_Gr1lF7xvr2IYc2Ij64vIr4 1lc7CjxVAaw2AFwI0_JF0_Jw1l42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_ Gr1l4IxYO2xFxVAFwI0_Jrv_JF1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8GjcxK67 AKxVWUGVWUWwC2zVAF1VAY17CE14v26r1q6r43MIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8I cVAFwI0_Jr0_JF4lIxAIcVC0I7IYx2IY6xkF7I0E14v26r1j6r4UMIIF0xvE42xK8VAvwI 8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87Iv6xkF7I0E14v2 6r1j6r4UYxBIdaVFxhVjvjDU0xZFpf9x07jOa93UUUUU= Hi all: This patch set introduces the Loongson-2K BMC. It is a PCIe device present on servers similar to the Loongson-3 CPUs. And it is a multifunctional device (MFD), such as display as a sub-function of it. For IPMI, according to the existing design, we use software simulation to implement the KCS interface registers: Stauts/Command/Data_Out/Data_In. Also since both host side and BMC side read and write kcs status, we use fifo pointer to ensure data consistency. For the display, based on simpledrm, the resolution is read from a fixed position in the BMC since the hardware does not support auto-detection of the resolution. Of course, we will try to support multiple resolutions later, through a vbios-like approach. Especially, for the BMC reset function, since the display will be disconnected when BMC reset, we made a special treatment of re-push. Based on this, I will present it in four patches: patch-1: BMC device PCI resource allocation. patch-2: BMC reset function support patch-3: IPMI implementation Thanks. ------- V10: Patch (2/3): - The PTR_ERR(NULL) is success. It should be "ret = -ENOMEM;". - https://lore.kernel.org/all/202508191519.uT5io1jk-lkp@intel.com/ Link to V9: https://lore.kernel.org/all/cover.1754999365.git.zhoubinbin@loongson.cn/ V9: Patch (2/3): - PCIE -> PCI-E in dev_err(); - Separate the read from the write; Link to V8: https://lore.kernel.org/all/cover.1752548073.git.zhoubinbin@loongson.cn/ V8: Patch (1/3): - Similar to as3711_subdevs, identify elements in ls2k_bmc_cells. Patch (2/3): - Rename variables using usual names, such as `priv` -> `ddata`; - Use if statements instead of #ifery; - Rewrite the error message to ensure it is easy to understand; - ls2k_bmc_pdata_initial(dev, priv); -> ls2k_bmc_pdata_initial(priv); Link to V7: https://lore.kernel.org/all/cover.1751617911.git.zhoubinbin@loongson.cn/ V7: Patch (1/3): - Fix build warning by lkp: Add depend on ACPI_GENERIC_GSI - https://lore.kernel.org/all/202507021011.sDAHGinj-lkp@intel.com/ Link to V6: https://lore.kernel.org/all/cover.1750939357.git.zhoubinbin@loongson.cn/ V6: - Add Acked-by tag from Corey, thanks; Patch (1/3): - Fix build warning by lkp: Add depend on PCI - https://lore.kernel.org/all/202506210204.LVZc2VG2-lkp@intel.com/ - https://lore.kernel.org/all/202506210231.ZWWNhofU-lkp@intel.com/ - https://lore.kernel.org/all/202506210652.ipUFDU5B-lkp@intel.com/ - https://lore.kernel.org/all/202506210343.XCHkzorp-lkp@intel.com/ Link to V5: https://lore.kernel.org/all/cover.1750301674.git.zhoubinbin@loongson.cn/ V5: Patch (1/3): - Rename ls2kbmc-mfd.c to ls2k-bmc-core.c; - Rename MFD_LS2K_BMC to MFD_LS2K_BMC_CORE and update its help text. Patch (3/3): - Add an IPMI_LS2K config in the IPMI section that enables the IPMI interface and selects MFD_LS2K_BMC_CORE. Link to V4: https://lore.kernel.org/all/cover.1749731531.git.zhoubinbin@loongson.cn/ V4: - Add Reviewed-by tag; - Change the order of the patches. Patch (1/3): - Fix build warning by lkp: Kconfig tristate -> bool - https://lore.kernel.org/all/202505312022.QmFmGE1F-lkp@intel.com/ - Update commit message; - Move MFD_LS2K_BMC after MFD_INTEL_M10_BMC_PMCI in Kconfig and Makefile. Patch (2/3): - Remove unnecessary newlines; - Rename ls2k_bmc_check_pcie_connected() to ls2k_bmc_pcie_is_connected(); - Update comment message. Patch (3/3): - Remove unnecessary newlines. Link to V3: https://lore.kernel.org/all/cover.1748505446.git.zhoubinbin@loongson.cn/ V3: Patch (1/3): - Drop "MFD" in title and comment; - Fromatting code; - Add clearer comments. Patch (2/3): - Rebase linux-ipmi/next tree; - Use readx()/writex() to read and write IPMI data instead of structure pointer references; - CONFIG_LOONGARCH -> MFD_LS2K_BMC; - Drop unused output. Patch (3/3): - Inline the ls2k_bmc_gpio_reset_handler() function to ls2k_bmc_pdata_initial(); - Add clearer comments. - Use proper multi-line commentary as per the Coding Style documentation; - Define all magic numbers. Link to V2: https://lore.kernel.org/all/cover.1747276047.git.zhoubinbin@loongson.cn/ V2: - Drop ls2kdrm, use simpledrm instead. Patch (1/3): - Use DEFINE_RES_MEM_NAMED/MFD_CELL_RES simplified code; - Add resolution fetching due to replacing the original display solution with simpledrm; - Add aperture_remove_conflicting_devices() to avoid efifb conflict with simpledrm. Patch (3/3): - This part of the function, moved from the original ls2kdrm to mfd; - Use set_console to implement the Re-push display function. Link to V1: https://lore.kernel.org/all/cover.1735550269.git.zhoubinbin@loongson.cn/ Binbin Zhou (3): mfd: ls2kbmc: Introduce Loongson-2K BMC core driver mfd: ls2kbmc: Add Loongson-2K BMC reset function support ipmi: Add Loongson-2K BMC support MAINTAINERS | 7 + drivers/char/ipmi/Kconfig | 7 + drivers/char/ipmi/Makefile | 1 + drivers/char/ipmi/ipmi_si.h | 7 + drivers/char/ipmi/ipmi_si_intf.c | 4 + drivers/char/ipmi/ipmi_si_ls2k.c | 189 +++++++++++ drivers/mfd/Kconfig | 13 + drivers/mfd/Makefile | 2 + drivers/mfd/ls2k-bmc-core.c | 525 +++++++++++++++++++++++++++++++ 9 files changed, 755 insertions(+) create mode 100644 drivers/char/ipmi/ipmi_si_ls2k.c create mode 100644 drivers/mfd/ls2k-bmc-core.c base-commit: c0eb742dd61cd6809c480d2c9687d78fce941225 -- 2.47.3