From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, UNPARSEABLE_RELAY,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 515CDC352A5 for ; Tue, 11 Feb 2020 03:41:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2E0782082F for ; Tue, 11 Feb 2020 03:41:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727998AbgBKDlM (ORCPT ); Mon, 10 Feb 2020 22:41:12 -0500 Received: from out30-45.freemail.mail.aliyun.com ([115.124.30.45]:60918 "EHLO out30-45.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727831AbgBKDlM (ORCPT ); Mon, 10 Feb 2020 22:41:12 -0500 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R681e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01f04396;MF=guoren@linux.alibaba.com;NM=1;PH=DS;RN=5;SR=0;TI=SMTPD_---0TpeDRM7_1581392468; Received: from localhost(mailfrom:guoren@linux.alibaba.com fp:SMTPD_---0TpeDRM7_1581392468) by smtp.aliyun-inc.com(127.0.0.1); Tue, 11 Feb 2020 11:41:09 +0800 From: Guo Ren To: linux-csky@vger.kernel.org, majun258@linux.alibaba.com Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, Guo Ren Subject: [PATCH] csky: Add PCI support Date: Tue, 11 Feb 2020 11:41:07 +0800 Message-Id: <20200211034107.11192-1-guoren@linux.alibaba.com> X-Mailer: git-send-email 2.17.0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: MaJun Add the pci related code for csky arch to support basic pci virtual function, such as qemu virt-pci-9pfs. Signed-off-by: MaJun Signed-off-by: Guo Ren --- arch/csky/Kconfig | 5 +++++ arch/csky/include/asm/pci.h | 34 ++++++++++++++++++++++++++++++++++ 2 files changed, 39 insertions(+) create mode 100644 arch/csky/include/asm/pci.h diff --git a/arch/csky/Kconfig b/arch/csky/Kconfig index bf246b036dee..72b2999a889a 100644 --- a/arch/csky/Kconfig +++ b/arch/csky/Kconfig @@ -58,6 +58,11 @@ config CSKY select TIMER_OF select USB_ARCH_HAS_EHCI select USB_ARCH_HAS_OHCI + select GENERIC_PCI_IOMAP + select HAVE_PCI + select PCI_DOMAINS_GENERIC if PCI + select PCI_SYSCALL if PCI + select PCI_MSI if PCI config CPU_HAS_CACHEV2 bool diff --git a/arch/csky/include/asm/pci.h b/arch/csky/include/asm/pci.h new file mode 100644 index 000000000000..ebc765b1f78b --- /dev/null +++ b/arch/csky/include/asm/pci.h @@ -0,0 +1,34 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#ifndef __ASM_CSKY_PCI_H +#define __ASM_CSKY_PCI_H + +#include +#include +#include + +#include + +#define PCIBIOS_MIN_IO 0 +#define PCIBIOS_MIN_MEM 0 + +/* C-SKY shim does not initialize PCI bus */ +#define pcibios_assign_all_busses() 1 + +extern int isa_dma_bridge_buggy; + +#ifdef CONFIG_PCI +static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel) +{ + /* no legacy IRQ on csky */ + return -ENODEV; +} + +static inline int pci_proc_domain(struct pci_bus *bus) +{ + /* always show the domain in /proc */ + return 1; +} +#endif /* CONFIG_PCI */ + +#endif /* __ASM_CSKY_PCI_H */ -- 2.17.0