From patchwork Fri Apr 23 11:38:32 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jean-Philippe Brucker X-Patchwork-Id: 12220257 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DD258C433B4 for ; Fri, 23 Apr 2021 11:56:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 934C46144D for ; Fri, 23 Apr 2021 11:56:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230376AbhDWL5d (ORCPT ); Fri, 23 Apr 2021 07:57:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36702 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229957AbhDWL5c (ORCPT ); Fri, 23 Apr 2021 07:57:32 -0400 Received: from mail-wm1-x334.google.com (mail-wm1-x334.google.com [IPv6:2a00:1450:4864:20::334]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 433F2C06174A for ; Fri, 23 Apr 2021 04:56:56 -0700 (PDT) Received: by mail-wm1-x334.google.com with SMTP id y124-20020a1c32820000b029010c93864955so1059126wmy.5 for ; Fri, 23 Apr 2021 04:56:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=FsRbQGwgPPyTX9wed12qTQDvSstkWFdppnOjxRuHqVc=; b=ejY8PdllvGtau5SI84NlsFbQ/jOjJ60UTzOvs0UchL/+TFV03CkbyL8XNmfd/WRviN sRhV1ivb/6t70ipJzwGH3V2nwgvr2CC7e65EfkzCyG0Hd/t59p2UrA7/2X6oAiCYawVn osUbAydpApJ0S8TUhbVaV9JAPFB3T9Iv2eFi6NcuYwt9i4qFBrUBHaxcRtHf1YD8sh53 ftWVMzYGg/42zGxpp8e+PeFOxEAFSJdB902bFsF4XH6MyC7wj3RiFQQSQfEvQZxqnort 4HWeT9xiHnW4C0KFMeiyhR38PuYOylfhgT6e5JTFMsnvSVz4wKDW1kxw/rFG9cuOr51P gVAQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=FsRbQGwgPPyTX9wed12qTQDvSstkWFdppnOjxRuHqVc=; b=P0F67RbY4dxnRddb4xdF6Dz0yG08swkPQvBcfA1rKDjfIoHqPhTOPDlodL12Vw4CQZ 0HmBSEbQHanzXw9xdd3spqIUscGFyCJo/UhHkzynnsxs5ueH6svgUzcIT7kJ6qhiC3dB V2Dm48JJiHVdWoJYKaiH2tGUGM9USJxYxImAY34v9TOt3dZLmJq/lFAmIWOAsPxurabV J2oLgdESJlg8UQMCcgyVgR5TRZFA9VfL+IiHASmr0wpNa6MSQUXvPgBWNZTd4Ne5PMko wB0zOspjOwy5ZfACTSpvLJNgweleznzamFc4Y/bwFtzv/HUq+Y1syzfOWChNYzKq62U1 ZEww== X-Gm-Message-State: AOAM530Qe68coNvwLD7CpbLJZCKZuzPomVs4mRgiOtCekp37K2XCs6qi vrqM6urzZBcxhNMsZxHbNzSdhQ== X-Google-Smtp-Source: ABdhPJwFxm4cppgkEw1zzbXnamtX6GQwV4iOsj4o89kuGJEKVh1cwAkLGBz3rTZhiTvkNtcuHciiKA== X-Received: by 2002:a05:600c:3796:: with SMTP id o22mr5082783wmr.139.1619179014941; Fri, 23 Apr 2021 04:56:54 -0700 (PDT) Received: from localhost.localdomain ([2001:1715:4e26:a7e0:116c:c27a:3e7f:5eaf]) by smtp.gmail.com with ESMTPSA id g9sm7485195wmh.21.2021.04.23.04.56.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 23 Apr 2021 04:56:54 -0700 (PDT) From: Jean-Philippe Brucker To: rjw@rjwysocki.net, lenb@kernel.org, joro@8bytes.org, mst@redhat.com Cc: will@kernel.org, catalin.marinas@arm.com, baolu.lu@linux.intel.com, dwmw2@infradead.org, linux-acpi@vger.kernel.org, iommu@lists.linux-foundation.org, virtualization@lists.linux-foundation.org, linux-arm-kernel@lists.infradead.org, eric.auger@redhat.com, sebastien.boeuf@intel.com, robin.murphy@arm.com, kevin.tian@intel.com, lorenzo.pieralisi@arm.com, guohanjun@huawei.com, sudeep.holla@arm.com, jean-philippe@linaro.org Subject: [PATCH v2 1/6] ACPI: arm64: Move DMA setup operations out of IORT Date: Fri, 23 Apr 2021 13:38:32 +0200 Message-Id: <20210423113836.3974972-2-jean-philippe@linaro.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210423113836.3974972-1-jean-philippe@linaro.org> References: <20210423113836.3974972-1-jean-philippe@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org Extract generic DMA setup code out of IORT, so it can be reused by VIOT. Keep it in drivers/acpi/arm64 for now, since it could break x86 platforms that haven't run this code so far, if they have invalid tables. Signed-off-by: Jean-Philippe Brucker --- drivers/acpi/arm64/Makefile | 1 + include/linux/acpi.h | 3 +++ include/linux/acpi_iort.h | 6 ++--- drivers/acpi/arm64/dma.c | 50 ++++++++++++++++++++++++++++++++++ drivers/acpi/arm64/iort.c | 54 ++++++------------------------------- drivers/acpi/scan.c | 2 +- 6 files changed, 66 insertions(+), 50 deletions(-) create mode 100644 drivers/acpi/arm64/dma.c diff --git a/drivers/acpi/arm64/Makefile b/drivers/acpi/arm64/Makefile index 6ff50f4ed947..66acbe77f46e 100644 --- a/drivers/acpi/arm64/Makefile +++ b/drivers/acpi/arm64/Makefile @@ -1,3 +1,4 @@ # SPDX-License-Identifier: GPL-2.0-only obj-$(CONFIG_ACPI_IORT) += iort.o obj-$(CONFIG_ACPI_GTDT) += gtdt.o +obj-y += dma.o diff --git a/include/linux/acpi.h b/include/linux/acpi.h index c60745f657e9..7aaa9559cc19 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -259,9 +259,12 @@ void acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa); #ifdef CONFIG_ARM64 void acpi_numa_gicc_affinity_init(struct acpi_srat_gicc_affinity *pa); +void acpi_arch_dma_setup(struct device *dev, u64 *dma_addr, u64 *dma_size); #else static inline void acpi_numa_gicc_affinity_init(struct acpi_srat_gicc_affinity *pa) { } +static inline void +acpi_arch_dma_setup(struct device *dev, u64 *dma_addr, u64 *dma_size) { } #endif int acpi_numa_memory_affinity_init (struct acpi_srat_mem_affinity *ma); diff --git a/include/linux/acpi_iort.h b/include/linux/acpi_iort.h index 1a12baa58e40..f7f054833afd 100644 --- a/include/linux/acpi_iort.h +++ b/include/linux/acpi_iort.h @@ -34,7 +34,7 @@ struct irq_domain *iort_get_device_domain(struct device *dev, u32 id, void acpi_configure_pmsi_domain(struct device *dev); int iort_pmsi_get_dev_id(struct device *dev, u32 *dev_id); /* IOMMU interface */ -void iort_dma_setup(struct device *dev, u64 *dma_addr, u64 *size); +int iort_dma_get_ranges(struct device *dev, u64 *size); const struct iommu_ops *iort_iommu_configure_id(struct device *dev, const u32 *id_in); int iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head); @@ -48,8 +48,8 @@ static inline struct irq_domain *iort_get_device_domain( { return NULL; } static inline void acpi_configure_pmsi_domain(struct device *dev) { } /* IOMMU interface */ -static inline void iort_dma_setup(struct device *dev, u64 *dma_addr, - u64 *size) { } +static inline int iort_dma_get_ranges(struct device *dev, u64 *size) +{ return -ENODEV; } static inline const struct iommu_ops *iort_iommu_configure_id( struct device *dev, const u32 *id_in) { return NULL; } diff --git a/drivers/acpi/arm64/dma.c b/drivers/acpi/arm64/dma.c new file mode 100644 index 000000000000..f16739ad3cc0 --- /dev/null +++ b/drivers/acpi/arm64/dma.c @@ -0,0 +1,50 @@ +// SPDX-License-Identifier: GPL-2.0-only +#include +#include +#include +#include + +void acpi_arch_dma_setup(struct device *dev, u64 *dma_addr, u64 *dma_size) +{ + int ret; + u64 end, mask; + u64 dmaaddr = 0, size = 0, offset = 0; + + /* + * If @dev is expected to be DMA-capable then the bus code that created + * it should have initialised its dma_mask pointer by this point. For + * now, we'll continue the legacy behaviour of coercing it to the + * coherent mask if not, but we'll no longer do so quietly. + */ + if (!dev->dma_mask) { + dev_warn(dev, "DMA mask not set\n"); + dev->dma_mask = &dev->coherent_dma_mask; + } + + if (dev->coherent_dma_mask) + size = max(dev->coherent_dma_mask, dev->coherent_dma_mask + 1); + else + size = 1ULL << 32; + + ret = acpi_dma_get_range(dev, &dmaaddr, &offset, &size); + if (ret == -ENODEV) + ret = iort_dma_get_ranges(dev, &size); + if (!ret) { + /* + * Limit coherent and dma mask based on size retrieved from + * firmware. + */ + end = dmaaddr + size - 1; + mask = DMA_BIT_MASK(ilog2(end) + 1); + dev->bus_dma_limit = end; + dev->coherent_dma_mask = min(dev->coherent_dma_mask, mask); + *dev->dma_mask = min(*dev->dma_mask, mask); + } + + *dma_addr = dmaaddr; + *dma_size = size; + + ret = dma_direct_set_offset(dev, dmaaddr + offset, dmaaddr, size); + + dev_dbg(dev, "dma_offset(%#08llx)%s\n", offset, ret ? " failed!" : ""); +} diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c index 3912a1f6058e..a940be1cf2af 100644 --- a/drivers/acpi/arm64/iort.c +++ b/drivers/acpi/arm64/iort.c @@ -1144,56 +1144,18 @@ static int rc_dma_get_range(struct device *dev, u64 *size) } /** - * iort_dma_setup() - Set-up device DMA parameters. + * iort_dma_get_ranges() - Look up DMA addressing limit for the device + * @dev: device to lookup + * @size: DMA range size result pointer * - * @dev: device to configure - * @dma_addr: device DMA address result pointer - * @dma_size: DMA range size result pointer + * Return: 0 on success, an error otherwise. */ -void iort_dma_setup(struct device *dev, u64 *dma_addr, u64 *dma_size) +int iort_dma_get_ranges(struct device *dev, u64 *size) { - u64 end, mask, dmaaddr = 0, size = 0, offset = 0; - int ret; - - /* - * If @dev is expected to be DMA-capable then the bus code that created - * it should have initialised its dma_mask pointer by this point. For - * now, we'll continue the legacy behaviour of coercing it to the - * coherent mask if not, but we'll no longer do so quietly. - */ - if (!dev->dma_mask) { - dev_warn(dev, "DMA mask not set\n"); - dev->dma_mask = &dev->coherent_dma_mask; - } - - if (dev->coherent_dma_mask) - size = max(dev->coherent_dma_mask, dev->coherent_dma_mask + 1); + if (dev_is_pci(dev)) + return rc_dma_get_range(dev, size); else - size = 1ULL << 32; - - ret = acpi_dma_get_range(dev, &dmaaddr, &offset, &size); - if (ret == -ENODEV) - ret = dev_is_pci(dev) ? rc_dma_get_range(dev, &size) - : nc_dma_get_range(dev, &size); - - if (!ret) { - /* - * Limit coherent and dma mask based on size retrieved from - * firmware. - */ - end = dmaaddr + size - 1; - mask = DMA_BIT_MASK(ilog2(end) + 1); - dev->bus_dma_limit = end; - dev->coherent_dma_mask = min(dev->coherent_dma_mask, mask); - *dev->dma_mask = min(*dev->dma_mask, mask); - } - - *dma_addr = dmaaddr; - *dma_size = size; - - ret = dma_direct_set_offset(dev, dmaaddr + offset, dmaaddr, size); - - dev_dbg(dev, "dma_offset(%#08llx)%s\n", offset, ret ? " failed!" : ""); + return nc_dma_get_range(dev, size); } static void __init acpi_iort_register_irq(int hwirq, const char *name, diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index bc973fbd70b2..e166916eb9db 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -1536,7 +1536,7 @@ int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr, return 0; } - iort_dma_setup(dev, &dma_addr, &size); + acpi_arch_dma_setup(dev, &dma_addr, &size); iommu = iort_iommu_configure_id(dev, input_id); if (PTR_ERR(iommu) == -EPROBE_DEFER)