From patchwork Fri Aug 25 09:32:05 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yoshihiro Shimoda X-Patchwork-Id: 717008 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 62E4AEE49A5 for ; Fri, 25 Aug 2023 09:33:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244281AbjHYJcn (ORCPT ); Fri, 25 Aug 2023 05:32:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54140 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241310AbjHYJc1 (ORCPT ); Fri, 25 Aug 2023 05:32:27 -0400 Received: from relmlie5.idc.renesas.com (relmlor1.renesas.com [210.160.252.171]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 2FCF11FE3; Fri, 25 Aug 2023 02:32:25 -0700 (PDT) X-IronPort-AV: E=Sophos;i="6.02,195,1688396400"; d="scan'208";a="173961356" Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie5.idc.renesas.com with ESMTP; 25 Aug 2023 18:32:23 +0900 Received: from localhost.localdomain (unknown [10.166.15.32]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id 94E8340134E1; Fri, 25 Aug 2023 18:32:23 +0900 (JST) From: Yoshihiro Shimoda To: jingoohan1@gmail.com, gustavo.pimentel@synopsys.com, lpieralisi@kernel.org, robh+dt@kernel.org, kw@linux.com, manivannan.sadhasivam@linaro.org, bhelgaas@google.com, kishon@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org Cc: marek.vasut+renesas@gmail.com, fancer.lancer@gmail.com, linux-pci@vger.kernel.org, devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Yoshihiro Shimoda Subject: [PATCH v20 05/19] PCI: dwc: endpoint: Add multiple PFs support for dbi2 Date: Fri, 25 Aug 2023 18:32:05 +0900 Message-Id: <20230825093219.2685912-6-yoshihiro.shimoda.uh@renesas.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230825093219.2685912-1-yoshihiro.shimoda.uh@renesas.com> References: <20230825093219.2685912-1-yoshihiro.shimoda.uh@renesas.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org The commit 24ede430fa49 ("PCI: designware-ep: Add multiple PFs support for DWC") added .func_conf_select() to get the configuration space of different PFs and assumed that the offsets between dbi and dbi2 would be the same. However, Renesas R-Car Gen4 PCIe controllers have different offsets of function 1: dbi (+0x1000) and dbi2 (+0x800). To get the offset for dbi2, add .get_dbi2_offset() and dw_pcie_ep_get_dbi2_offset(). Note: - .func_conf_select() should be renamed later. - dw_pcie_ep_get_dbi2_offset() will call .func_conf_select() if .get_dbi2_offset() doesn't exist for backward compatibility. - dw_pcie_writeX_{dbi/dbi2} APIs accepted the func_no argument, so that these offset calculations are contained in the API definitions itself as it should. Signed-off-by: Yoshihiro Shimoda --- .../pci/controller/dwc/pcie-designware-ep.c | 32 ++++++++++++++----- drivers/pci/controller/dwc/pcie-designware.h | 1 + 2 files changed, 25 insertions(+), 8 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c index 91e3c4335031..feeb2ea3c9c7 100644 --- a/drivers/pci/controller/dwc/pcie-designware-ep.c +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c @@ -54,21 +54,35 @@ static unsigned int dw_pcie_ep_func_select(struct dw_pcie_ep *ep, u8 func_no) return func_offset; } +static unsigned int dw_pcie_ep_get_dbi2_offset(struct dw_pcie_ep *ep, u8 func_no) +{ + unsigned int dbi2_offset = 0; + + if (ep->ops->get_dbi2_offset) + dbi2_offset = ep->ops->get_dbi2_offset(ep, func_no); + else if (ep->ops->func_conf_select) /* for backward compatibility */ + dbi2_offset = ep->ops->func_conf_select(ep, func_no); + + return dbi2_offset; +} + static void __dw_pcie_ep_reset_bar(struct dw_pcie *pci, u8 func_no, enum pci_barno bar, int flags) { - u32 reg; - unsigned int func_offset = 0; + unsigned int func_offset, dbi2_offset; struct dw_pcie_ep *ep = &pci->ep; + u32 reg, reg_dbi2; func_offset = dw_pcie_ep_func_select(ep, func_no); + dbi2_offset = dw_pcie_ep_get_dbi2_offset(ep, func_no); reg = func_offset + PCI_BASE_ADDRESS_0 + (4 * bar); + reg_dbi2 = dbi2_offset + PCI_BASE_ADDRESS_0 + (4 * bar); dw_pcie_dbi_ro_wr_en(pci); - dw_pcie_writel_dbi2(pci, reg, 0x0); + dw_pcie_writel_dbi2(pci, reg_dbi2, 0x0); dw_pcie_writel_dbi(pci, reg, 0x0); if (flags & PCI_BASE_ADDRESS_MEM_TYPE_64) { - dw_pcie_writel_dbi2(pci, reg + 4, 0x0); + dw_pcie_writel_dbi2(pci, reg_dbi2 + 4, 0x0); dw_pcie_writel_dbi(pci, reg + 4, 0x0); } dw_pcie_dbi_ro_wr_dis(pci); @@ -229,16 +243,18 @@ static int dw_pcie_ep_set_bar(struct pci_epc *epc, u8 func_no, u8 vfunc_no, { struct dw_pcie_ep *ep = epc_get_drvdata(epc); struct dw_pcie *pci = to_dw_pcie_from_ep(ep); + unsigned int func_offset, dbi2_offset; enum pci_barno bar = epf_bar->barno; size_t size = epf_bar->size; int flags = epf_bar->flags; - unsigned int func_offset = 0; + u32 reg, reg_dbi2; int ret, type; - u32 reg; func_offset = dw_pcie_ep_func_select(ep, func_no); + dbi2_offset = dw_pcie_ep_get_dbi2_offset(ep, func_no); reg = PCI_BASE_ADDRESS_0 + (4 * bar) + func_offset; + reg_dbi2 = PCI_BASE_ADDRESS_0 + (4 * bar) + dbi2_offset; if (!(flags & PCI_BASE_ADDRESS_SPACE)) type = PCIE_ATU_TYPE_MEM; @@ -254,11 +270,11 @@ static int dw_pcie_ep_set_bar(struct pci_epc *epc, u8 func_no, u8 vfunc_no, dw_pcie_dbi_ro_wr_en(pci); - dw_pcie_writel_dbi2(pci, reg, lower_32_bits(size - 1)); + dw_pcie_writel_dbi2(pci, reg_dbi2, lower_32_bits(size - 1)); dw_pcie_writel_dbi(pci, reg, flags); if (flags & PCI_BASE_ADDRESS_MEM_TYPE_64) { - dw_pcie_writel_dbi2(pci, reg + 4, upper_32_bits(size - 1)); + dw_pcie_writel_dbi2(pci, reg_dbi2 + 4, upper_32_bits(size - 1)); dw_pcie_writel_dbi(pci, reg + 4, 0); } diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index e02d4986bc2b..b731e38a71fc 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -354,6 +354,7 @@ struct dw_pcie_ep_ops { * driver. */ unsigned int (*func_conf_select)(struct dw_pcie_ep *ep, u8 func_no); + unsigned int (*get_dbi2_offset)(struct dw_pcie_ep *ep, u8 func_no); }; struct dw_pcie_ep_func {