From patchwork Mon Sep 5 07:12:51 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yoshihiro Shimoda X-Patchwork-Id: 12965680 X-Patchwork-Delegate: lorenzo.pieralisi@arm.com Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 42541ECAAA1 for ; Mon, 5 Sep 2022 07:19:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236070AbiIEHTj (ORCPT ); Mon, 5 Sep 2022 03:19:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34112 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237354AbiIEHTI (ORCPT ); Mon, 5 Sep 2022 03:19:08 -0400 Received: from relmlie5.idc.renesas.com (relmlor1.renesas.com [210.160.252.171]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id DDCE441D18; Mon, 5 Sep 2022 00:14:12 -0700 (PDT) X-IronPort-AV: E=Sophos;i="5.93,290,1654527600"; d="scan'208";a="131687304" Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie5.idc.renesas.com with ESMTP; 05 Sep 2022 16:13:09 +0900 Received: from localhost.localdomain (unknown [10.166.15.32]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id 98E2F4004465; Mon, 5 Sep 2022 16:13:09 +0900 (JST) From: Yoshihiro Shimoda To: lpieralisi@kernel.org, robh+dt@kernel.org, kw@linux.com, bhelgaas@google.com, krzk+dt@kernel.org, geert+renesas@glider.be, magnus.damm@gmail.com Cc: marek.vasut+renesas@gmail.com, linux-pci@vger.kernel.org, devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Yoshihiro Shimoda Subject: [PATCH v5 06/12] PCI: dwc: Add reset_all_bars flag Date: Mon, 5 Sep 2022 16:12:51 +0900 Message-Id: <20220905071257.1059436-7-yoshihiro.shimoda.uh@renesas.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220905071257.1059436-1-yoshihiro.shimoda.uh@renesas.com> References: <20220905071257.1059436-1-yoshihiro.shimoda.uh@renesas.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Some PCIe endpoint drivers reset all BARs in each ep_init() ops. So, we can reset the BARs into the common code if the flag is set. Signed-off-by: Yoshihiro Shimoda --- drivers/pci/controller/dwc/pcie-designware-ep.c | 10 ++++++++++ drivers/pci/controller/dwc/pcie-designware.h | 1 + 2 files changed, 11 insertions(+) diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c index 1b7e9e1b8d52..a79482824e74 100644 --- a/drivers/pci/controller/dwc/pcie-designware-ep.c +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c @@ -83,6 +83,14 @@ void dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar) } EXPORT_SYMBOL_GPL(dw_pcie_ep_reset_bar); +static void dw_pcie_ep_reset_all_bars(struct dw_pcie *pci) +{ + enum pci_barno bar; + + for (bar = BAR_0; bar < PCI_STD_NUM_BARS; bar++) + dw_pcie_ep_reset_bar(pci, bar); +} + static u8 __dw_pcie_ep_find_next_cap(struct dw_pcie_ep *ep, u8 func_no, u8 cap_ptr, u8 cap) { @@ -759,6 +767,8 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep) if (ep->ops->ep_init) ep->ops->ep_init(ep); + if (ep->reset_all_bars) + dw_pcie_ep_reset_all_bars(pci); ret = pci_epc_mem_init(epc, ep->phys_base, ep->addr_size, ep->page_size); diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index 9ed9621a12e4..0ad9ed77affb 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -353,6 +353,7 @@ struct dw_pcie_ep { void __iomem *msi_mem; phys_addr_t msi_mem_phys; struct pci_epf_bar *epf_bar[PCI_STD_NUM_BARS]; + bool reset_all_bars; }; struct dw_pcie_ops {