From patchwork Tue Dec 19 17:45:24 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sunil V L X-Patchwork-Id: 13498705 Received: from mail-pf1-f170.google.com (mail-pf1-f170.google.com [209.85.210.170]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 35950405EF for ; Tue, 19 Dec 2023 17:47:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ventanamicro.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ventanamicro.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ventanamicro.com header.i=@ventanamicro.com header.b="WsgdaWQA" Received: by mail-pf1-f170.google.com with SMTP id d2e1a72fcca58-6d3165ac96bso1777545b3a.0 for ; Tue, 19 Dec 2023 09:47:00 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ventanamicro.com; s=google; t=1703008019; x=1703612819; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=rMG56uSWd/ufo/nc8FBDk9fzkMf+1BzSryO0Av4W69w=; b=WsgdaWQAUfzZZJcTIlfK1SZGlqDw3AjZkU2fQx/GMWXGj7NfWyp/x5DLjA86c3P/wE mOsAc597URWmWVAK8mXf+mbcJYCKKCEnaTeUCWbipxcDyHPpkLJsyQ2JHb847+2rvpmi r3LZZDvES8rvq4nzd+Af7ypJ+eBDL68yFM80EMnB5uQCCIgI7YiBdgzUGlYndHvhpTPb k4d8o1IRVZ9QjrgOP8CL5jyMinjpf7mKfgpJk6iW8IPw9Cf5U8HFurn3bz2ledXMtBh0 aPgXgVqIlnNgMIpKfdiHwjFCDM+lKiZ2pvhUYcUCn0tFmUAOLWXlL8TjDukDd33ay1yd zPnA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1703008019; x=1703612819; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=rMG56uSWd/ufo/nc8FBDk9fzkMf+1BzSryO0Av4W69w=; b=vx6/59JzvZC7BZpLAfBYcTqITXu+Gb7fFzC3ZA7f8Dg1ImSK4cpJgPu0ezO7p7ChHS kLx7GMb6k9E14urlH15waXU1f1EcO6PjE2ClC0EEnUOWGSOsqppYiffxlT4HSuRLEUTh jSsA08gtYuN8+r2bU/cfiHytPkWPfrxxEE20LhaeHdCO9jpJbQBWgnbI2/xoqhIxUcxu 4KqDMTbhap0rlOSqi9xEchOhCjABeLllDeSGWfGkY5nL/1q3CuFCwl1D7M4SWw+CFGD8 9b/bY7EXKhrAUC7ZShpw/SWcRcfo54uZnbZ/Gn7LhjKFsfLRYhflslmYMV/Qoj34mJKt 0duA== X-Gm-Message-State: AOJu0Yzt3fas1XDfMhb5R6mKwA7v65q2GhqV0UtGknTLSKy+m+A+L9Q8 6O2HupV+Y4P3/MmI3MFDDUOgyg== X-Google-Smtp-Source: AGHT+IHXM72nArT21GjLZtiiN3K06SzkiamqR5ZRviUGxMyVpE460cqqru+VtpRXXtaDP8/IywYfuQ== X-Received: by 2002:a17:902:eb8a:b0:1d3:da07:5731 with SMTP id q10-20020a170902eb8a00b001d3da075731mr1397869plg.22.1703008019566; Tue, 19 Dec 2023 09:46:59 -0800 (PST) Received: from sunil-pc.Dlink ([106.51.188.200]) by smtp.gmail.com with ESMTPSA id n16-20020a170903111000b001d3320f6143sm14453015plh.269.2023.12.19.09.46.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 19 Dec 2023 09:46:59 -0800 (PST) From: Sunil V L To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, linux-acpi@vger.kernel.org, linux-pci@vger.kernel.org Cc: Catalin Marinas , Will Deacon , Paul Walmsley , Palmer Dabbelt , Albert Ou , "Rafael J . Wysocki" , Len Brown , Anup Patel , Thomas Gleixner , Bjorn Helgaas , Haibo Xu , Conor Dooley , Andrew Jones , =?utf-8?b?QmrDtnJuIFTDtnBlbA==?= , Marc Zyngier , Sunil V L Subject: [RFC PATCH v3 15/17] ACPI: RISC-V: Create APLIC platform device Date: Tue, 19 Dec 2023 23:15:24 +0530 Message-Id: <20231219174526.2235150-16-sunilvl@ventanamicro.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231219174526.2235150-1-sunilvl@ventanamicro.com> References: <20231219174526.2235150-1-sunilvl@ventanamicro.com> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Since APLIC needs to be a platform device, probe the MADT and create platform devices for each APLIC in the system. Signed-off-by: Sunil V L --- drivers/acpi/riscv/init.c | 2 + drivers/acpi/riscv/init.h | 5 ++ drivers/acpi/riscv/irq.c | 118 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 125 insertions(+) create mode 100644 drivers/acpi/riscv/init.h diff --git a/drivers/acpi/riscv/init.c b/drivers/acpi/riscv/init.c index b5807bbdb171..e7eff7ab1474 100644 --- a/drivers/acpi/riscv/init.c +++ b/drivers/acpi/riscv/init.c @@ -6,7 +6,9 @@ */ #include +#include "init.h" void __init acpi_riscv_init(void) { + riscv_acpi_aplic_platform_init(); } diff --git a/drivers/acpi/riscv/init.h b/drivers/acpi/riscv/init.h new file mode 100644 index 000000000000..17bcf0baaadb --- /dev/null +++ b/drivers/acpi/riscv/init.h @@ -0,0 +1,5 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#include + +void __init riscv_acpi_imsic_platform_init(void); +void __init riscv_acpi_aplic_platform_init(void); diff --git a/drivers/acpi/riscv/irq.c b/drivers/acpi/riscv/irq.c index 36e0525b3235..d08a851ab6dc 100644 --- a/drivers/acpi/riscv/irq.c +++ b/drivers/acpi/riscv/irq.c @@ -6,7 +6,36 @@ */ #include +#include +#include +#include #include +#include "init.h" + +static LIST_HEAD(ext_intc_list); + +struct ext_intc_fwnode_list { + struct fwnode_handle *fwnode; + u32 gsi_base; + u32 nr_irqs; + struct list_head list; +}; + +struct fwnode_handle *ext_entc_get_gsi_domain_id(u32 gsi) +{ + struct ext_intc_fwnode_list *ext_intc_element; + struct list_head *i, *tmp; + + /* Find the External Interrupt controller that manages this GSI. */ + list_for_each_safe(i, tmp, &ext_intc_list) { + ext_intc_element = list_entry(i, struct ext_intc_fwnode_list, list); + if (gsi >= ext_intc_element->gsi_base && + gsi < (ext_intc_element->gsi_base + ext_intc_element->nr_irqs)) + return ext_intc_element->fwnode; + } + + return NULL; +} static int irqchip_cmp_func(const void *in0, const void *in1) { @@ -30,3 +59,92 @@ void arch_sort_irqchip_probe(struct acpi_probe_entry *ap_head, int nr) return; sort(ape, nr, sizeof(*ape), irqchip_cmp_func, NULL); } + +static int __init irqchip_add_platform_device(char *irqchip_name, u32 irqchip_id, + resource_size_t iomem_res_start, + resource_size_t iomem_res_size, + u32 gsi_base, + u32 nr_irqs, + union acpi_subtable_headers *header) +{ + struct ext_intc_fwnode_list *ext_intc_element; + struct platform_device *pdev; + struct fwnode_handle *fn; + struct resource *res; + int ret; + + fn = irq_domain_alloc_named_id_fwnode(irqchip_name, irqchip_id); + if (!fn) + return -ENOMEM; + + pdev = platform_device_alloc(irqchip_name, irqchip_id); + if (!pdev) { + irq_domain_free_fwnode(fn); + return -ENOMEM; + } + + res = kcalloc(1, sizeof(*res), GFP_KERNEL); + if (!res) { + irq_domain_free_fwnode(fn); + platform_device_put(pdev); + return -ENOMEM; + } + + ext_intc_element = kcalloc(1, sizeof(*ext_intc_element), GFP_KERNEL); + if (!ext_intc_element) + return -ENOMEM; + + ext_intc_element->fwnode = fn; + ext_intc_element->gsi_base = gsi_base; + ext_intc_element->nr_irqs = nr_irqs; + list_add_tail(&ext_intc_element->list, &ext_intc_list); + + res->start = iomem_res_start; + res->end = res->start + iomem_res_size - 1; + res->flags = IORESOURCE_MEM; + ret = platform_device_add_resources(pdev, res, 1); + /* + * Resources are duplicated in platform_device_add_resources, + * free their allocated memory + */ + kfree(res); + + /* + * Add copy of aplic pointer so that platform driver get aplic details. + */ + ret = platform_device_add_data(pdev, &header, sizeof(header)); + if (ret) { + irq_domain_free_fwnode(fn); + platform_device_put(pdev); + return ret; + } + + pdev->dev.fwnode = fn; + ret = platform_device_add(pdev); + if (ret) { + irq_domain_free_fwnode(fn); + platform_device_put(pdev); + return ret; + } + + return 0; +} + +static int __init aplic_parse_madt(union acpi_subtable_headers *header, + const unsigned long end) +{ + struct acpi_madt_aplic *aplic = (struct acpi_madt_aplic *)header; + + return irqchip_add_platform_device("riscv-aplic", + aplic->id, + aplic->base_addr, + aplic->size, + aplic->gsi_base, + aplic->num_sources, + header); +} + +void __init riscv_acpi_aplic_platform_init(void) +{ + acpi_table_parse_madt(ACPI_MADT_TYPE_APLIC, aplic_parse_madt, 0); +}