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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 091FEC433EF for ; Fri, 24 Jun 2022 14:40:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232470AbiFXOkO (ORCPT ); Fri, 24 Jun 2022 10:40:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40764 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233024AbiFXOkL (ORCPT ); Fri, 24 Jun 2022 10:40:11 -0400 Received: from mail.baikalelectronics.com (mail.baikalelectronics.com [87.245.175.230]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id EBC55647B1; Fri, 24 Jun 2022 07:40:03 -0700 (PDT) Received: from mail (mail.baikal.int [192.168.51.25]) by mail.baikalelectronics.com (Postfix) with ESMTP id 50F155BC6; Fri, 24 Jun 2022 17:41:19 +0300 (MSK) DKIM-Filter: OpenDKIM Filter v2.11.0 mail.baikalelectronics.com 50F155BC6 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baikalelectronics.ru; s=mail; t=1656081679; bh=74JObRDPD4kFcRvofWKBybBg4BZsB/S9rb+QiDdcfL4=; h=From:To:CC:Subject:Date:In-Reply-To:References:From; b=lhxOa+1PnvElCaMWKCxQAx6n38usXCFG/KuEA+bfCrk5INmNdnejLDf6TtfR2RCCX ku8xbE6KqC8euaiWgKwDCEXSWl/nSRbJ/jPrB2cabM3yduv9THAzHrxCkArWEE59hH HJS8Bxj6yw4u2w16f4LUIhZT3mODqtfz7e8NhGLU= Received: from localhost (192.168.53.207) by mail (192.168.51.25) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Fri, 24 Jun 2022 17:39:59 +0300 From: Serge Semin To: Rob Herring , Bjorn Helgaas , Lorenzo Pieralisi , Jingoo Han , Gustavo Pimentel , Lorenzo Pieralisi , =?UTF-8?q?Krzysztof=20Wilczy=C5=84ski?= CC: Serge Semin , Serge Semin , Alexey Malahov , Pavel Parkhomenko , Frank Li , Manivannan Sadhasivam , Rob Herring , , , Subject: [PATCH RESEND v4 09/15] PCI: dwc: Drop inbound iATU types enumeration - dw_pcie_as_type Date: Fri, 24 Jun 2022 17:39:41 +0300 Message-ID: <20220624143947.8991-10-Sergey.Semin@baikalelectronics.ru> In-Reply-To: <20220624143947.8991-1-Sergey.Semin@baikalelectronics.ru> References: <20220624143947.8991-1-Sergey.Semin@baikalelectronics.ru> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: MAIL.baikal.int (192.168.51.25) To mail (192.168.51.25) Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org There is no point in having an enumeration declared in the driver for the PCIe end-point. First of all it's redundant since the driver already has a set of macro declared which describe the available in/out iATU types, thus having an addition abstraction just needlessly complicates the code. Secondly checking the passed iATU type for validity within a single driver is pointless since the driver is supposed to be consistent by its nature. Finally the outbound iATU type isn't encoded by the denoted enumeration, thus giving a false impression that the in and out iATU types are unrelated while they are the same. So to speak let's drop the redundant dw_pcie_as_type enumeration replacing it with the direct iATU type usage. While at it, since we are touching the iATU inbound regions config methods anyway, let's fix the arguments order so the type would be followed by the address-related parameters. Thus the inbound and outbound iATU setup methods will look alike. That shall improve the code readability a bit. Signed-off-by: Serge Semin Reviewed-by: Rob Herring --- .../pci/controller/dwc/pcie-designware-ep.c | 21 +++++------ drivers/pci/controller/dwc/pcie-designware.c | 35 +++---------------- drivers/pci/controller/dwc/pcie-designware.h | 9 +---- 3 files changed, 15 insertions(+), 50 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c index ffbd3af6d65a..5a158813f687 100644 --- a/drivers/pci/controller/dwc/pcie-designware-ep.c +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c @@ -154,9 +154,8 @@ static int dw_pcie_ep_write_header(struct pci_epc *epc, u8 func_no, u8 vfunc_no, return 0; } -static int dw_pcie_ep_inbound_atu(struct dw_pcie_ep *ep, u8 func_no, - enum pci_barno bar, dma_addr_t cpu_addr, - enum dw_pcie_as_type as_type) +static int dw_pcie_ep_inbound_atu(struct dw_pcie_ep *ep, u8 func_no, int type, + dma_addr_t cpu_addr, enum pci_barno bar) { int ret; u32 free_win; @@ -168,8 +167,8 @@ static int dw_pcie_ep_inbound_atu(struct dw_pcie_ep *ep, u8 func_no, return -EINVAL; } - ret = dw_pcie_prog_inbound_atu(pci, func_no, free_win, bar, cpu_addr, - as_type); + ret = dw_pcie_prog_inbound_atu(pci, func_no, free_win, type, + cpu_addr, bar); if (ret < 0) { dev_err(pci->dev, "Failed to program IB window\n"); return ret; @@ -221,27 +220,25 @@ static void dw_pcie_ep_clear_bar(struct pci_epc *epc, u8 func_no, u8 vfunc_no, static int dw_pcie_ep_set_bar(struct pci_epc *epc, u8 func_no, u8 vfunc_no, struct pci_epf_bar *epf_bar) { - int ret; struct dw_pcie_ep *ep = epc_get_drvdata(epc); struct dw_pcie *pci = to_dw_pcie_from_ep(ep); enum pci_barno bar = epf_bar->barno; size_t size = epf_bar->size; int flags = epf_bar->flags; - enum dw_pcie_as_type as_type; - u32 reg; unsigned int func_offset = 0; + int ret, type; + u32 reg; func_offset = dw_pcie_ep_func_select(ep, func_no); reg = PCI_BASE_ADDRESS_0 + (4 * bar) + func_offset; if (!(flags & PCI_BASE_ADDRESS_SPACE)) - as_type = DW_PCIE_AS_MEM; + type = PCIE_ATU_TYPE_MEM; else - as_type = DW_PCIE_AS_IO; + type = PCIE_ATU_TYPE_IO; - ret = dw_pcie_ep_inbound_atu(ep, func_no, bar, - epf_bar->phys_addr, as_type); + ret = dw_pcie_ep_inbound_atu(ep, func_no, type, epf_bar->phys_addr, bar); if (ret) return ret; diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c index bd575ad32bc4..330575182712 100644 --- a/drivers/pci/controller/dwc/pcie-designware.c +++ b/drivers/pci/controller/dwc/pcie-designware.c @@ -421,10 +421,9 @@ static void dw_pcie_writel_ib_unroll(struct dw_pcie *pci, u32 index, u32 reg, } static int dw_pcie_prog_inbound_atu_unroll(struct dw_pcie *pci, u8 func_no, - int index, int bar, u64 cpu_addr, - enum dw_pcie_as_type as_type) + int index, int type, + u64 cpu_addr, u8 bar) { - int type; u32 retries, val; dw_pcie_writel_ib_unroll(pci, index, PCIE_ATU_UNR_LOWER_TARGET, @@ -432,17 +431,6 @@ static int dw_pcie_prog_inbound_atu_unroll(struct dw_pcie *pci, u8 func_no, dw_pcie_writel_ib_unroll(pci, index, PCIE_ATU_UNR_UPPER_TARGET, upper_32_bits(cpu_addr)); - switch (as_type) { - case DW_PCIE_AS_MEM: - type = PCIE_ATU_TYPE_MEM; - break; - case DW_PCIE_AS_IO: - type = PCIE_ATU_TYPE_IO; - break; - default: - return -EINVAL; - } - dw_pcie_writel_ib_unroll(pci, index, PCIE_ATU_UNR_REGION_CTRL1, type | PCIE_ATU_FUNC_NUM(func_no)); dw_pcie_writel_ib_unroll(pci, index, PCIE_ATU_UNR_REGION_CTRL2, @@ -468,32 +456,19 @@ static int dw_pcie_prog_inbound_atu_unroll(struct dw_pcie *pci, u8 func_no, } int dw_pcie_prog_inbound_atu(struct dw_pcie *pci, u8 func_no, int index, - int bar, u64 cpu_addr, - enum dw_pcie_as_type as_type) + int type, u64 cpu_addr, u8 bar) { - int type; u32 retries, val; if (pci->iatu_unroll_enabled) - return dw_pcie_prog_inbound_atu_unroll(pci, func_no, index, bar, - cpu_addr, as_type); + return dw_pcie_prog_inbound_atu_unroll(pci, func_no, index, type, + cpu_addr, bar); dw_pcie_writel_dbi(pci, PCIE_ATU_VIEWPORT, PCIE_ATU_REGION_INBOUND | index); dw_pcie_writel_dbi(pci, PCIE_ATU_LOWER_TARGET, lower_32_bits(cpu_addr)); dw_pcie_writel_dbi(pci, PCIE_ATU_UPPER_TARGET, upper_32_bits(cpu_addr)); - switch (as_type) { - case DW_PCIE_AS_MEM: - type = PCIE_ATU_TYPE_MEM; - break; - case DW_PCIE_AS_IO: - type = PCIE_ATU_TYPE_IO; - break; - default: - return -EINVAL; - } - dw_pcie_writel_dbi(pci, PCIE_ATU_CR1, type | PCIE_ATU_FUNC_NUM(func_no)); dw_pcie_writel_dbi(pci, PCIE_ATU_CR2, PCIE_ATU_ENABLE | diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index 7f1c00fa084d..c63ace3c3f25 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -228,12 +228,6 @@ struct dw_pcie_rp { DECLARE_BITMAP(msi_irq_in_use, MAX_MSI_IRQS); }; -enum dw_pcie_as_type { - DW_PCIE_AS_UNKNOWN, - DW_PCIE_AS_MEM, - DW_PCIE_AS_IO, -}; - struct dw_pcie_ep_ops { void (*ep_init)(struct dw_pcie_ep *ep); int (*raise_irq)(struct dw_pcie_ep *ep, u8 func_no, @@ -331,8 +325,7 @@ void dw_pcie_prog_ep_outbound_atu(struct dw_pcie *pci, u8 func_no, int index, int type, u64 cpu_addr, u64 pci_addr, u64 size); int dw_pcie_prog_inbound_atu(struct dw_pcie *pci, u8 func_no, int index, - int bar, u64 cpu_addr, - enum dw_pcie_as_type as_type); + int type, u64 cpu_addr, u8 bar); void dw_pcie_disable_atu(struct dw_pcie *pci, int index, enum dw_pcie_region_type type); void dw_pcie_setup(struct dw_pcie *pci); -- 2.35.1