From patchwork Wed Jul 5 11:41:51 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yoshihiro Shimoda X-Patchwork-Id: 13302035 X-Patchwork-Delegate: kw@linux.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 75F59C001DD for ; Wed, 5 Jul 2023 11:46:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231770AbjGELqy (ORCPT ); Wed, 5 Jul 2023 07:46:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50328 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231721AbjGELqx (ORCPT ); Wed, 5 Jul 2023 07:46:53 -0400 Received: from relmlie5.idc.renesas.com (relmlor1.renesas.com [210.160.252.171]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id A40EB19BE; Wed, 5 Jul 2023 04:46:37 -0700 (PDT) X-IronPort-AV: E=Sophos;i="6.01,182,1684767600"; d="scan'208";a="166982754" Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie5.idc.renesas.com with ESMTP; 05 Jul 2023 20:46:12 +0900 Received: from localhost.localdomain (unknown [10.166.15.32]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id 3E6C9400C458; Wed, 5 Jul 2023 20:46:12 +0900 (JST) From: Yoshihiro Shimoda To: jingoohan1@gmail.com, gustavo.pimentel@synopsys.com, lpieralisi@kernel.org, robh+dt@kernel.org, kw@linux.com, 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 v17 05/20] PCI: dwc: Add outbound MSG TLPs support Date: Wed, 5 Jul 2023 20:41:51 +0900 Message-Id: <20230705114206.3585188-6-yoshihiro.shimoda.uh@renesas.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230705114206.3585188-1-yoshihiro.shimoda.uh@renesas.com> References: <20230705114206.3585188-1-yoshihiro.shimoda.uh@renesas.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Add "code" and "routing" into struct dw_pcie_ob_atu_cfg for sending MSG by iATU in the PCIe endpoint mode in near the future. PCIE_ATU_INHIBIT_PAYLOAD is set to issue TLP type of Msg instead of MsgD. So, this implementation supports the data-less messages only for now. Signed-off-by: Yoshihiro Shimoda Reviewed-by: Serge Semin --- drivers/pci/controller/dwc/pcie-designware.c | 9 +++++++-- drivers/pci/controller/dwc/pcie-designware.h | 4 ++++ 2 files changed, 11 insertions(+), 2 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c index e4ac1def7363..a531dc50abea 100644 --- a/drivers/pci/controller/dwc/pcie-designware.c +++ b/drivers/pci/controller/dwc/pcie-designware.c @@ -498,7 +498,7 @@ int dw_pcie_prog_outbound_atu(struct dw_pcie *pci, dw_pcie_writel_atu_ob(pci, atu->index, PCIE_ATU_UPPER_TARGET, upper_32_bits(atu->pci_addr)); - val = atu->type | PCIE_ATU_FUNC_NUM(atu->func_no); + val = atu->type | atu->routing | PCIE_ATU_FUNC_NUM(atu->func_no); if (upper_32_bits(limit_addr) > upper_32_bits(cpu_addr) && dw_pcie_ver_is_ge(pci, 460A)) val |= PCIE_ATU_INCREASE_REGION_SIZE; @@ -506,7 +506,12 @@ int dw_pcie_prog_outbound_atu(struct dw_pcie *pci, val = dw_pcie_enable_ecrc(val); dw_pcie_writel_atu_ob(pci, atu->index, PCIE_ATU_REGION_CTRL1, val); - dw_pcie_writel_atu_ob(pci, atu->index, PCIE_ATU_REGION_CTRL2, PCIE_ATU_ENABLE); + val = PCIE_ATU_ENABLE; + if (atu->type == PCIE_ATU_TYPE_MSG) { + /* The data-less messages only for now */ + val |= PCIE_ATU_INHIBIT_PAYLOAD | atu->code; + } + dw_pcie_writel_atu_ob(pci, atu->index, PCIE_ATU_REGION_CTRL2, val); /* * Make sure ATU enable takes effect before any subsequent config diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index 85de0d8346fa..c626d21243b0 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -147,11 +147,13 @@ #define PCIE_ATU_TYPE_IO 0x2 #define PCIE_ATU_TYPE_CFG0 0x4 #define PCIE_ATU_TYPE_CFG1 0x5 +#define PCIE_ATU_TYPE_MSG 0x10 #define PCIE_ATU_TD BIT(8) #define PCIE_ATU_FUNC_NUM(pf) ((pf) << 20) #define PCIE_ATU_REGION_CTRL2 0x004 #define PCIE_ATU_ENABLE BIT(31) #define PCIE_ATU_BAR_MODE_ENABLE BIT(30) +#define PCIE_ATU_INHIBIT_PAYLOAD BIT(22) #define PCIE_ATU_FUNC_NUM_MATCH_EN BIT(19) #define PCIE_ATU_LOWER_BASE 0x008 #define PCIE_ATU_UPPER_BASE 0x00C @@ -292,6 +294,8 @@ struct dw_pcie_ob_atu_cfg { int index; int type; u8 func_no; + u8 code; + u8 routing; u64 cpu_addr; u64 pci_addr; u64 size;