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=-8.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=unavailable 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 13E80C31E48 for ; Wed, 12 Jun 2019 06:42:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DB17D20896 for ; Wed, 12 Jun 2019 06:42:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2405196AbfFLGmI (ORCPT ); Wed, 12 Jun 2019 02:42:08 -0400 Received: from mga03.intel.com ([134.134.136.65]:46990 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726066AbfFLGmI (ORCPT ); Wed, 12 Jun 2019 02:42:08 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 11 Jun 2019 23:42:06 -0700 X-ExtLoop1: 1 Received: from lftan-mobl.gar.corp.intel.com (HELO ubuntu) ([10.226.248.70]) by FMSMGA003.fm.intel.com with SMTP; 11 Jun 2019 23:42:04 -0700 Received: by ubuntu (sSMTP sendmail emulation); Wed, 12 Jun 2019 14:42:02 +0800 From: Ley Foon Tan To: Bjorn Helgaas , Lorenzo Pieralisi Cc: linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, lftan.linux@gmail.com, Ley Foon Tan Subject: [PATCH v2] PCI: altera: Fix configuration type based on secondary number Date: Wed, 12 Jun 2019 14:42:00 +0800 Message-Id: <1560321720-4083-1-git-send-email-ley.foon.tan@intel.com> X-Mailer: git-send-email 2.7.4 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This fix issue when access config from PCIe switch. Stratix 10 PCIe controller does not support Type 1 to Type 0 conversion as previous version (V1) does. The PCIe controller need to send Type 0 config TLP if the targeting bus matches with the secondary bus number, which is when the TLP is targeting the immediate device on the link. The PCIe controller send Type 1 config TLP if the targeting bus is larger than the secondary bus, which is when the TLP is targeting the device not immediate on the link. Signed-off-by: Ley Foon Tan --- v2: - Add get_tlp_header() function. --- drivers/pci/controller/pcie-altera.c | 41 ++++++++++++++++++---------- 1 file changed, 27 insertions(+), 14 deletions(-) diff --git a/drivers/pci/controller/pcie-altera.c b/drivers/pci/controller/pcie-altera.c index 27222071ace7..d2497ca43828 100644 --- a/drivers/pci/controller/pcie-altera.c +++ b/drivers/pci/controller/pcie-altera.c @@ -44,6 +44,8 @@ #define S10_RP_RXCPL_STATUS 0x200C #define S10_RP_CFG_ADDR(pcie, reg) \ (((pcie)->hip_base) + (reg) + (1 << 20)) +#define S10_RP_SECONDARY(pcie) \ + readb(S10_RP_CFG_ADDR(pcie, PCI_SECONDARY_BUS)) /* TLP configuration type 0 and 1 */ #define TLP_FMTTYPE_CFGRD0 0x04 /* Configuration Read Type 0 */ @@ -55,14 +57,9 @@ #define TLP_WRITE_TAG 0x10 #define RP_DEVFN 0 #define TLP_REQ_ID(bus, devfn) (((bus) << 8) | (devfn)) -#define TLP_CFGRD_DW0(pcie, bus) \ - ((((bus == pcie->root_bus_nr) ? pcie->pcie_data->cfgrd0 \ - : pcie->pcie_data->cfgrd1) << 24) | \ - TLP_PAYLOAD_SIZE) -#define TLP_CFGWR_DW0(pcie, bus) \ - ((((bus == pcie->root_bus_nr) ? pcie->pcie_data->cfgwr0 \ - : pcie->pcie_data->cfgwr1) << 24) | \ - TLP_PAYLOAD_SIZE) +#define TLP_CFG_DW0(pcie, cfg) \ + (((cfg) << 24) | \ + TLP_PAYLOAD_SIZE) #define TLP_CFG_DW1(pcie, tag, be) \ (((TLP_REQ_ID(pcie->root_bus_nr, RP_DEVFN)) << 16) | (tag << 8) | (be)) #define TLP_CFG_DW2(bus, devfn, offset) \ @@ -322,14 +319,31 @@ static void s10_tlp_write_packet(struct altera_pcie *pcie, u32 *headers, s10_tlp_write_tx(pcie, data, RP_TX_EOP); } +static void get_tlp_header(struct altera_pcie *pcie, u8 bus, u32 devfn, + int where, u8 byte_en, bool read, u32 *headers) +{ + u8 cfg; + u8 cfg0 = read ? pcie->pcie_data->cfgrd0 : pcie->pcie_data->cfgwr0; + u8 cfg1 = read ? pcie->pcie_data->cfgrd1 : pcie->pcie_data->cfgwr1; + u8 tag = read ? TLP_READ_TAG : TLP_WRITE_TAG; + + if (pcie->pcie_data->version == ALTERA_PCIE_V1) + cfg = (bus == pcie->root_bus_nr) ? cfg0 : cfg1; + else + cfg = (bus > S10_RP_SECONDARY(pcie)) ? cfg0 : cfg1; + + headers[0] = TLP_CFG_DW0(pcie, cfg); + headers[1] = TLP_CFG_DW1(pcie, tag, byte_en); + headers[2] = TLP_CFG_DW2(bus, devfn, where); +} + static int tlp_cfg_dword_read(struct altera_pcie *pcie, u8 bus, u32 devfn, int where, u8 byte_en, u32 *value) { u32 headers[TLP_HDR_SIZE]; - headers[0] = TLP_CFGRD_DW0(pcie, bus); - headers[1] = TLP_CFG_DW1(pcie, TLP_READ_TAG, byte_en); - headers[2] = TLP_CFG_DW2(bus, devfn, where); + get_tlp_header(pcie, bus, devfn, where, byte_en, true, + headers); pcie->pcie_data->ops->tlp_write_pkt(pcie, headers, 0, false); @@ -342,9 +356,8 @@ static int tlp_cfg_dword_write(struct altera_pcie *pcie, u8 bus, u32 devfn, u32 headers[TLP_HDR_SIZE]; int ret; - headers[0] = TLP_CFGWR_DW0(pcie, bus); - headers[1] = TLP_CFG_DW1(pcie, TLP_WRITE_TAG, byte_en); - headers[2] = TLP_CFG_DW2(bus, devfn, where); + get_tlp_header(pcie, bus, devfn, where, byte_en, false, + headers); /* check alignment to Qword */ if ((where & 0x7) == 0) -- 2.19.0