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Tue, 12 Sep 2023 22:09:27 +0000 (GMT) From: Ninad Palsule To: joel@jms.id.au, andrew@aj.id.au, eajames@linux.ibm.com Subject: [PATCH v3 1/2] soc/aspeed: Add host side BMC device driver Date: Tue, 12 Sep 2023 17:09:22 -0500 Message-Id: <20230912220923.3701688-2-ninad@linux.ibm.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230912220923.3701688-1-ninad@linux.ibm.com> References: <20230912220923.3701688-1-ninad@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: LKhstPAQ1fWqrYq8R2ZVfpe3XCT1vauq X-Proofpoint-ORIG-GUID: LKhstPAQ1fWqrYq8R2ZVfpe3XCT1vauq X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.957,Hydra:6.0.601,FMLib:17.11.176.26 definitions=2023-09-12_21,2023-09-05_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 adultscore=0 bulkscore=0 impostorscore=0 suspectscore=0 spamscore=0 clxscore=1015 mlxscore=0 phishscore=0 mlxlogscore=999 malwarescore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2308100000 definitions=main-2309120187 X-BeenThere: linux-aspeed@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux ASPEED SoC development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-aspeed@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Errors-To: linux-aspeed-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linux-aspeed" Taken from ASPEED's 5.15 SDK kernel. The AST2600 supports 2 VUARTs over LPC bus and 2 over PCIe bus. This patch adds host side driver for PCIe based VUARTs. Testing: - This is tested on IBM rainier system with BMC. It requires BMC side BMC device driver which is available in the ASPEED's 5.15 SDK kernel. Also it is working only with legacy interrupt. TODO: MSI interrupt handling. [ 1.313775][ T985] ASPEED BMC DEVICE 0002:02:01.0: enabling device (0140 -> 0142) [ 1.314381][ T985] 0002:02:01.0: ttyS0 at MMIO 0x600c100100fe0 (irq = 91, base_baud = 115200) is a 16550A [ 1.314607][ T985] 0002:02:01.0: ttyS1 at MMIO 0x600c100100be0 (irq = 91, base_baud = 115200) is a 16550A - The host is loaded through IBM openpower petitboot boot loaded. - Character echoed from BMC tty device seen on the host side tty device and vice versa. - BMC side root@p10bmc:~# echo "123" > /dev/ttyPCIVUART0 root@p10bmc:~# echo "Hello" > /dev/ttyPCIVUART0 - Host side # cat /dev/ttyS0 123 Hello Co-developed-by: Joel Stanley Signed-off-by: Joel Stanley Signed-off-by: Ninad Palsule Tested-by: Ninad Palsule --- V2: - Incorporated review comments from Andrew Lunn - Fixed warning reported by kernel test robot. - Fixed crashed in the error recovery path --- V3: - Add PCI dependency in the Kconfig to fix issue reported by kernel test robot. - Fixed wanring indicated by checkpatch script. --- drivers/soc/aspeed/Kconfig | 11 + drivers/soc/aspeed/Makefile | 1 + drivers/soc/aspeed/aspeed-host-bmc-dev.c | 250 +++++++++++++++++++++++ 3 files changed, 262 insertions(+) create mode 100644 drivers/soc/aspeed/aspeed-host-bmc-dev.c diff --git a/drivers/soc/aspeed/Kconfig b/drivers/soc/aspeed/Kconfig index f579ee0b5afa..8a4f096d84cd 100644 --- a/drivers/soc/aspeed/Kconfig +++ b/drivers/soc/aspeed/Kconfig @@ -52,6 +52,17 @@ config ASPEED_SOCINFO help Say yes to support decoding of ASPEED BMC information. +config ASPEED_HOST_BMC_DEV + bool "ASPEED SoC Host BMC device driver" + select SOC_BUS + default ARCH_ASPEED + depends on PCI + help + Say yes to support PCIe based VUARTs from the host side. The end to + end VUART communication between host and BMC requires BMC side driver + to activate VUART functionality. This is a driver for the BMC device + on host. + endmenu endif diff --git a/drivers/soc/aspeed/Makefile b/drivers/soc/aspeed/Makefile index b35d74592964..db6acff9fa52 100644 --- a/drivers/soc/aspeed/Makefile +++ b/drivers/soc/aspeed/Makefile @@ -4,3 +4,4 @@ obj-$(CONFIG_ASPEED_LPC_SNOOP) += aspeed-lpc-snoop.o obj-$(CONFIG_ASPEED_UART_ROUTING) += aspeed-uart-routing.o obj-$(CONFIG_ASPEED_P2A_CTRL) += aspeed-p2a-ctrl.o obj-$(CONFIG_ASPEED_SOCINFO) += aspeed-socinfo.o +obj-$(CONFIG_ASPEED_HOST_BMC_DEV) += aspeed-host-bmc-dev.o diff --git a/drivers/soc/aspeed/aspeed-host-bmc-dev.c b/drivers/soc/aspeed/aspeed-host-bmc-dev.c new file mode 100644 index 000000000000..8d4efec85280 --- /dev/null +++ b/drivers/soc/aspeed/aspeed-host-bmc-dev.c @@ -0,0 +1,250 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +// Copyright (C) ASPEED Technology Inc. + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define BMC_MULTI_MSI 32 +#define BMC_MSI_IDX_BASE 4 + +#define DRIVER_NAME "ASPEED BMC DEVICE" + +#define VUART_MAX_PARMS 2 + +#define BAR_MEM 0 +#define BAR_MSG 1 +#define BAR_MAX 2 + +struct bar { + unsigned long bar_base; + unsigned long bar_size; + void __iomem *bar_ioremap; +}; + +struct aspeed_pci_bmc_dev { + struct device *dev; + + struct bar bars[BAR_MAX]; + int lines[VUART_MAX_PARMS]; + + int legacy_irq; +}; + +static uint16_t vuart_ioport[VUART_MAX_PARMS]; +static uint16_t vuart_sirq[VUART_MAX_PARMS]; + +static int aspeed_pci_host_bmc_device_probe(struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + struct uart_8250_port uart; + struct device *dev = &pdev->dev; + struct aspeed_pci_bmc_dev *pci_bmc_dev; + int rc = 0; + int i = 0; + int nr_entries; + u16 config_cmd_val; + + pci_bmc_dev = kzalloc(sizeof(*pci_bmc_dev), GFP_KERNEL); + if (!pci_bmc_dev) { + rc = -ENOMEM; + dev_err(dev, "kmalloc() returned NULL memory.\n"); + goto out_err; + } + + rc = pcim_enable_device(pdev); + if (rc != 0) { + dev_err(dev, "pcim_enable_device() returned error %d\n", rc); + goto out_free0; + } + + /* set PCI host mastering */ + pci_set_master(pdev); + + /* + * Try to allocate max MSI. If multiple MSI is not possible then use + * the legacy interrupt. Note: PowerPC doesn't support multiple MSI. + */ + nr_entries = pci_alloc_irq_vectors(pdev, 1, BMC_MULTI_MSI, + PCI_IRQ_MSIX | PCI_IRQ_MSI); + if (nr_entries < 0) { + pci_bmc_dev->legacy_irq = 1; + pci_read_config_word(pdev, PCI_COMMAND, &config_cmd_val); + config_cmd_val &= ~PCI_COMMAND_INTX_DISABLE; + pci_write_config_word((struct pci_dev *)pdev, PCI_COMMAND, config_cmd_val); + + } else { + pci_bmc_dev->legacy_irq = 0; + pci_read_config_word(pdev, PCI_COMMAND, &config_cmd_val); + config_cmd_val |= PCI_COMMAND_INTX_DISABLE; + pci_write_config_word((struct pci_dev *)pdev, PCI_COMMAND, config_cmd_val); + rc = pci_irq_vector(pdev, BMC_MSI_IDX_BASE); + if (rc < 0) { + dev_err(dev, "pci_irq_vector() returned error %d msi=%u msix=%u\n", + -rc, pdev->msi_enabled, pdev->msix_enabled); + goto out_free1; + } + pdev->irq = rc; + } + + /* Get access to the BARs */ + for (i = 0; i < BAR_MAX; i++) { + rc = pci_request_region(pdev, i, DRIVER_NAME); + if (rc < 0) { + dev_err(dev, "pci_request_region(%d) returned error %d\n", i, rc); + goto out_unreg; + } + + pci_bmc_dev->bars[i].bar_base = pci_resource_start(pdev, i); + pci_bmc_dev->bars[i].bar_size = pci_resource_len(pdev, i); + pci_bmc_dev->bars[i].bar_ioremap = pci_ioremap_bar(pdev, i); + if (pci_bmc_dev->bars[i].bar_ioremap == NULL) { + dev_err(dev, "pci_ioremap_bar(%d) failed\n", i); + rc = -ENOMEM; + goto out_unreg; + } + } + + /* ERRTA40: dummy read */ + (void)__raw_readl((void __iomem *)pci_bmc_dev->bars[BAR_MSG].bar_ioremap); + + pci_set_drvdata(pdev, pci_bmc_dev); + + for (i = 0; i < VUART_MAX_PARMS; i++) + pci_bmc_dev->lines[i] = -1; + + /* setup VUART */ + for (i = 0; i < VUART_MAX_PARMS; i++) { + memset(&uart, 0, sizeof(uart)); + vuart_ioport[i] = 0x3F8 - (i * 0x100); + vuart_sirq[i] = 0x10 + 4 - i - BMC_MSI_IDX_BASE; + uart.port.flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ; + uart.port.uartclk = 115200 * 16; + + if (pci_bmc_dev->legacy_irq) { + uart.port.irq = pdev->irq; + } else { + rc = pci_irq_vector(pdev, vuart_sirq[i]); + if (rc < 0) { + dev_err(dev, + "pci_irq_vector() returned error %d msi=%u msix=%u\n", + -rc, pdev->msi_enabled, pdev->msix_enabled); + goto out_unreg; + } + uart.port.irq = rc; + } + uart.port.dev = dev; + uart.port.iotype = UPIO_MEM32; + uart.port.iobase = 0; + uart.port.mapbase = + pci_bmc_dev->bars[BAR_MSG].bar_base + (vuart_ioport[i] << 2); + uart.port.membase = + pci_bmc_dev->bars[BAR_MSG].bar_ioremap + (vuart_ioport[i] << 2); + uart.port.type = PORT_16550A; + uart.port.flags |= (UPF_IOREMAP | UPF_FIXED_PORT | UPF_FIXED_TYPE); + uart.port.regshift = 2; + + rc = serial8250_register_8250_port(&uart); + if (rc < 0) { + dev_err(dev, + "cannot setup VUART@%xh over PCIe, rc=%d\n", + vuart_ioport[i], -rc); + goto out_unreg; + } + pci_bmc_dev->lines[i] = rc; + } + + return 0; + +out_unreg: + for (i = 0; i < VUART_MAX_PARMS; i++) { + if (pci_bmc_dev->lines[i] >= 0) + serial8250_unregister_port(pci_bmc_dev->lines[i]); + } + + pci_release_regions(pdev); +out_free1: + if (pci_bmc_dev->legacy_irq) + free_irq(pdev->irq, pdev); + else + pci_free_irq_vectors(pdev); + + pci_clear_master(pdev); +out_free0: + kfree(pci_bmc_dev); +out_err: + + return rc; +} + +static void aspeed_pci_host_bmc_device_remove(struct pci_dev *pdev) +{ + struct aspeed_pci_bmc_dev *pci_bmc_dev = pci_get_drvdata(pdev); + int i; + + /* Unregister ports */ + for (i = 0; i < VUART_MAX_PARMS; i++) { + if (pci_bmc_dev->lines[i] >= 0) + serial8250_unregister_port(pci_bmc_dev->lines[i]); + } + + if (pci_bmc_dev->legacy_irq) + free_irq(pdev->irq, pdev); + else + pci_free_irq_vectors(pdev); + + pci_release_regions(pdev); + pci_clear_master(pdev); + kfree(pci_bmc_dev); +} + +/** + * This table holds the list of (VendorID,DeviceID) supported by this driver + * + */ +static struct pci_device_id aspeed_host_bmc_dev_pci_ids[] = { + { PCI_DEVICE(0x1A03, 0x2402), }, + { 0, } +}; + +MODULE_DEVICE_TABLE(pci, aspeed_host_bmc_dev_pci_ids); + +static struct pci_driver aspeed_host_bmc_dev_driver = { + .name = DRIVER_NAME, + .id_table = aspeed_host_bmc_dev_pci_ids, + .probe = aspeed_pci_host_bmc_device_probe, + .remove = aspeed_pci_host_bmc_device_remove, +}; + +static int __init aspeed_host_bmc_device_init(void) +{ + int ret; + + /* register pci driver */ + ret = pci_register_driver(&aspeed_host_bmc_dev_driver); + if (ret < 0) { + pr_err("pci-driver: can't register pci driver\n"); + return ret; + } + + return 0; +} + +static void aspeed_host_bmc_device_exit(void) +{ + /* unregister pci driver */ + pci_unregister_driver(&aspeed_host_bmc_dev_driver); +} + +late_initcall(aspeed_host_bmc_device_init); +module_exit(aspeed_host_bmc_device_exit); + +MODULE_AUTHOR("Ryan Chen "); +MODULE_DESCRIPTION("ASPEED Host BMC DEVICE Driver"); +MODULE_LICENSE("GPL"); From patchwork Tue Sep 12 22:09:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ninad Palsule X-Patchwork-Id: 1833223 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; 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Tue, 12 Sep 2023 22:09:29 +0000 Received: from smtpav04.dal12v.mail.ibm.com (smtpav04.dal12v.mail.ibm.com [10.241.53.103]) by smtprelay02.wdc07v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 38CM9SEZ1442314 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 12 Sep 2023 22:09:28 GMT Received: from smtpav04.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5F4E45805E; Tue, 12 Sep 2023 22:09:28 +0000 (GMT) Received: from smtpav04.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 167E958063; Tue, 12 Sep 2023 22:09:28 +0000 (GMT) Received: from gfwa153.aus.stglabs.ibm.com (unknown [9.3.84.127]) by smtpav04.dal12v.mail.ibm.com (Postfix) with ESMTP; Tue, 12 Sep 2023 22:09:28 +0000 (GMT) From: Ninad Palsule To: joel@jms.id.au, andrew@aj.id.au, eajames@linux.ibm.com Subject: [PATCH v3 2/2] MAINTAINERS: Added maintainer for host bmc DD Date: Tue, 12 Sep 2023 17:09:23 -0500 Message-Id: <20230912220923.3701688-3-ninad@linux.ibm.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230912220923.3701688-1-ninad@linux.ibm.com> References: <20230912220923.3701688-1-ninad@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: oFqwElZRA5MgIJc5h1Fp3yrmBeK6ehV7 X-Proofpoint-ORIG-GUID: oFqwElZRA5MgIJc5h1Fp3yrmBeK6ehV7 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.957,Hydra:6.0.601,FMLib:17.11.176.26 definitions=2023-09-12_21,2023-09-05_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1011 priorityscore=1501 phishscore=0 mlxlogscore=999 suspectscore=0 mlxscore=0 bulkscore=0 malwarescore=0 impostorscore=0 lowpriorityscore=0 adultscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2308100000 definitions=main-2309120187 X-BeenThere: linux-aspeed@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux ASPEED SoC development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-aspeed@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Errors-To: linux-aspeed-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linux-aspeed" Added maintainer for new driver file. Signed-off-by: Ninad Palsule --- MAINTAINERS | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 3be1bdfe8ecc..471382a2fff5 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3100,6 +3100,13 @@ S: Maintained F: Documentation/devicetree/bindings/media/aspeed-video.txt F: drivers/media/platform/aspeed/ +ASPEED HOST BMC DEVICE DRIVER +M: Ninad Palsule +L: linux-media@vger.kernel.org +L: openbmc@lists.ozlabs.org (moderated for non-subscribers) +S: Maintained +F: drivers/soc/aspeed/aspeed-host-bmc-dev.c + ASUS EC HARDWARE MONITOR DRIVER M: Eugene Shalygin L: linux-hwmon@vger.kernel.org