From patchwork Tue Dec 8 12:14:00 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manivannan Sadhasivam X-Patchwork-Id: 11958321 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=-18.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, 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 F0B7DC19437 for ; Tue, 8 Dec 2020 12:15:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D7F452396F for ; Tue, 8 Dec 2020 12:15:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729507AbgLHMPo (ORCPT ); Tue, 8 Dec 2020 07:15:44 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45044 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728758AbgLHMPn (ORCPT ); Tue, 8 Dec 2020 07:15:43 -0500 Received: from mail-pg1-x541.google.com (mail-pg1-x541.google.com [IPv6:2607:f8b0:4864:20::541]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B3925C0617B0 for ; Tue, 8 Dec 2020 04:14:21 -0800 (PST) Received: by mail-pg1-x541.google.com with SMTP id w16so12016488pga.9 for ; Tue, 08 Dec 2020 04:14:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=C9A4Sk5yzGnBoQXxaXJoojpAXbsWlJ4ueKRiORr8CZ8=; b=aU8AQYyD9RlPyxeHX6sgagW//rSkG7w1RQCw673Z1Tll3iiS2a2GLSf5h/966ARWwK lphXxY8mh5nUNB5m0sXrPINeGZHWzrkSSqIma0f6l4hOd5WrutDCb+FgXUvyzg94fl/Q o9+Qy0iUY5lbddogvn6ASwtVVwzCADyX3lZUKfdHQQr2NqpDJHFOfg3ssBLKUvwq4/MA sTBJeSEZ2coF9SOa1tCwFBaPMHadib/sS4Kym+Ctru+ZLzdTHlFIzIJrj70UWkWZor7Q Qp4fm4yzKw9g5yoRAFAJ3CdCRzov0lgDyC4ytc5C1B/7EGAFPNTh2t7fy9XS+l0rx8xt byLw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=C9A4Sk5yzGnBoQXxaXJoojpAXbsWlJ4ueKRiORr8CZ8=; b=AyPBkdiwxwkLCs5d8n8GxKafIRf90lhhhxR1G9luYHIfvZ3ox0sAJIoOHu50eNDXDv 35GeY6fyWIGEGrhbBD1e3Jn7dQAwXBLRzjE1FC0y6OELmFJ/iTTJE8vUS1VeynvNvqfu 3+ar8h7zqUyoI/0f2IEWbPPUxp8Q6wuTvaHtdT/3Gu1a/RIXg0feBu7rWh2uQmwpXP10 jR4uCegqf28lUv4atZyMcDmJ1d8AEds23+wcMjCvLDCgOkj1VFLWvHCZoEkKamr+Jgjb MqnZypVqmdngMjgJu1AHKTfD7C44xcCn7KQkL+5ZXnEzY64iMrVwfZ4PrfN7fm95VAEl 8u7w== X-Gm-Message-State: AOAM533ILslJLjP+NemosbP2lpDwkyu+CdMlIjy1xfp/DmVNpcCvlddk vby8EyyCpviFAkfj4Tj00xbw X-Google-Smtp-Source: ABdhPJzfEn8S2FLIVfChKZcdxVrn/YiQ8yFchnbdWGpGFxo88xa206tKhhjsVfkXH/fr2sHJPtdj3g== X-Received: by 2002:a63:40e:: with SMTP id 14mr15489937pge.420.1607429661277; Tue, 08 Dec 2020 04:14:21 -0800 (PST) Received: from localhost.localdomain ([103.59.133.81]) by smtp.gmail.com with ESMTPSA id v3sm3489889pjn.7.2020.12.08.04.14.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 08 Dec 2020 04:14:20 -0800 (PST) From: Manivannan Sadhasivam X-Google-Original-From: Manivannan Sadhasivam To: lorenzo.pieralisi@arm.com Cc: agross@kernel.org, bjorn.andersson@linaro.org, svarbanov@mm-sol.com, bhelgaas@google.com, linux-arm-msm@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, mgautam@codeaurora.org, devicetree@vger.kernel.org, truong@codeaurora.org, Manivannan Sadhasivam , Rob Herring Subject: [PATCH v6 1/3] dt-bindings: pci: qcom: Document PCIe bindings for SM8250 SoC Date: Tue, 8 Dec 2020 17:44:00 +0530 Message-Id: <20201208121402.178011-2-mani@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20201208121402.178011-1-mani@kernel.org> References: <20201208121402.178011-1-mani@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: Manivannan Sadhasivam Document the PCIe DT bindings for SM8250 SoC. The PCIe IP is similar to the one used on SDM845, hence just add the compatible along with the optional "atu" register region. Signed-off-by: Manivannan Sadhasivam Reviewed-by: Bjorn Andersson Acked-by: Rob Herring --- Documentation/devicetree/bindings/pci/qcom,pcie.txt | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/Documentation/devicetree/bindings/pci/qcom,pcie.txt b/Documentation/devicetree/bindings/pci/qcom,pcie.txt index 02bc81bb8b2d..3b55310390a0 100644 --- a/Documentation/devicetree/bindings/pci/qcom,pcie.txt +++ b/Documentation/devicetree/bindings/pci/qcom,pcie.txt @@ -13,6 +13,7 @@ - "qcom,pcie-ipq8074" for ipq8074 - "qcom,pcie-qcs404" for qcs404 - "qcom,pcie-sdm845" for sdm845 + - "qcom,pcie-sm8250" for sm8250 - reg: Usage: required @@ -27,6 +28,7 @@ - "dbi" DesignWare PCIe registers - "elbi" External local bus interface registers - "config" PCIe configuration space + - "atu" ATU address space (optional) - device_type: Usage: required @@ -131,7 +133,7 @@ - "slave_bus" AXI Slave clock -clock-names: - Usage: required for sdm845 + Usage: required for sdm845 and sm8250 Value type: Definition: Should contain the following entries - "aux" Auxiliary clock @@ -206,7 +208,7 @@ - "ahb" AHB reset - reset-names: - Usage: required for sdm845 + Usage: required for sdm845 and sm8250 Value type: Definition: Should contain the following entries - "pci" PCIe core reset From patchwork Tue Dec 8 12:14:01 2020 Content-Type: text/plain; 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Tue, 08 Dec 2020 04:14:25 -0800 (PST) From: Manivannan Sadhasivam X-Google-Original-From: Manivannan Sadhasivam To: lorenzo.pieralisi@arm.com Cc: agross@kernel.org, bjorn.andersson@linaro.org, svarbanov@mm-sol.com, bhelgaas@google.com, linux-arm-msm@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, mgautam@codeaurora.org, devicetree@vger.kernel.org, truong@codeaurora.org, Manivannan Sadhasivam , Rob Herring Subject: [PATCH v6 2/3] PCI: qcom: Add SM8250 SoC support Date: Tue, 8 Dec 2020 17:44:01 +0530 Message-Id: <20201208121402.178011-3-mani@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20201208121402.178011-1-mani@kernel.org> References: <20201208121402.178011-1-mani@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: Manivannan Sadhasivam The PCIe IP (rev 1.9.0) on SM8250 SoC is similar to the one used on SDM845. Hence the support is added reusing the members of ops_2_7_0. The key difference between ops_2_7_0 and ops_1_9_0 is the config_sid callback, which will be added in successive commit. Signed-off-by: Manivannan Sadhasivam Reviewed-by: Rob Herring Reviewed-by: Bjorn Andersson --- drivers/pci/controller/dwc/pcie-qcom.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c index e49791c4f846..750ff7378870 100644 --- a/drivers/pci/controller/dwc/pcie-qcom.c +++ b/drivers/pci/controller/dwc/pcie-qcom.c @@ -1348,6 +1348,16 @@ static const struct qcom_pcie_ops ops_2_7_0 = { .post_deinit = qcom_pcie_post_deinit_2_7_0, }; +/* Qcom IP rev.: 1.9.0 */ +static const struct qcom_pcie_ops ops_1_9_0 = { + .get_resources = qcom_pcie_get_resources_2_7_0, + .init = qcom_pcie_init_2_7_0, + .deinit = qcom_pcie_deinit_2_7_0, + .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable, + .post_init = qcom_pcie_post_init_2_7_0, + .post_deinit = qcom_pcie_post_deinit_2_7_0, +}; + static const struct dw_pcie_ops dw_pcie_ops = { .link_up = qcom_pcie_link_up, .start_link = qcom_pcie_start_link, @@ -1446,6 +1456,7 @@ static const struct of_device_id qcom_pcie_match[] = { { .compatible = "qcom,pcie-ipq4019", .data = &ops_2_4_0 }, { .compatible = "qcom,pcie-qcs404", .data = &ops_2_4_0 }, { .compatible = "qcom,pcie-sdm845", .data = &ops_2_7_0 }, + { .compatible = "qcom,pcie-sm8250", .data = &ops_1_9_0 }, { } }; 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Tue, 08 Dec 2020 04:14:30 -0800 (PST) From: Manivannan Sadhasivam X-Google-Original-From: Manivannan Sadhasivam To: lorenzo.pieralisi@arm.com Cc: agross@kernel.org, bjorn.andersson@linaro.org, svarbanov@mm-sol.com, bhelgaas@google.com, linux-arm-msm@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, mgautam@codeaurora.org, devicetree@vger.kernel.org, truong@codeaurora.org, Manivannan Sadhasivam Subject: [PATCH v6 3/3] PCI: qcom: Add support for configuring BDF to SID mapping for SM8250 Date: Tue, 8 Dec 2020 17:44:02 +0530 Message-Id: <20201208121402.178011-4-mani@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20201208121402.178011-1-mani@kernel.org> References: <20201208121402.178011-1-mani@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: Manivannan Sadhasivam For SM8250, we need to write the BDF to SID mapping in PCIe controller register space for proper working. This is accomplished by extracting the BDF and SID values from "iommu-map" property in DT and writing those in the register address calculated from the hash value of BDF. In case of collisions, the index of the next entry will also be written. For the sake of it, let's introduce a "config_sid" callback and do it conditionally for SM8250. Signed-off-by: Manivannan Sadhasivam Reviewed-by: Bjorn Andersson --- drivers/pci/controller/dwc/Kconfig | 1 + drivers/pci/controller/dwc/pcie-qcom.c | 85 ++++++++++++++++++++++++++ 2 files changed, 86 insertions(+) diff --git a/drivers/pci/controller/dwc/Kconfig b/drivers/pci/controller/dwc/Kconfig index 9ee1e248e744..dd4596bdda49 100644 --- a/drivers/pci/controller/dwc/Kconfig +++ b/drivers/pci/controller/dwc/Kconfig @@ -174,6 +174,7 @@ config PCIE_QCOM depends on OF && (ARCH_QCOM || COMPILE_TEST) depends on PCI_MSI_IRQ_DOMAIN select PCIE_DW_HOST + select CRC8 help Say Y here to enable PCIe controller support on Qualcomm SoCs. The PCIe controller uses the DesignWare core plus Qualcomm-specific diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c index 750ff7378870..8ba3e6b29196 100644 --- a/drivers/pci/controller/dwc/pcie-qcom.c +++ b/drivers/pci/controller/dwc/pcie-qcom.c @@ -9,6 +9,7 @@ */ #include +#include #include #include #include @@ -57,6 +58,7 @@ #define PCIE20_PARF_SID_OFFSET 0x234 #define PCIE20_PARF_BDF_TRANSLATE_CFG 0x24C #define PCIE20_PARF_DEVICE_TYPE 0x1000 +#define PCIE20_PARF_BDF_TO_SID_TABLE_N 0x2000 #define PCIE20_ELBI_SYS_CTRL 0x04 #define PCIE20_ELBI_SYS_CTRL_LT_ENABLE BIT(0) @@ -97,6 +99,9 @@ #define QCOM_PCIE_2_1_0_MAX_SUPPLY 3 #define QCOM_PCIE_2_1_0_MAX_CLOCKS 5 + +#define QCOM_PCIE_CRC8_POLYNOMIAL (BIT(2) | BIT(1) | BIT(0)) + struct qcom_pcie_resources_2_1_0 { struct clk_bulk_data clks[QCOM_PCIE_2_1_0_MAX_CLOCKS]; struct reset_control *pci_reset; @@ -179,6 +184,7 @@ struct qcom_pcie_ops { void (*deinit)(struct qcom_pcie *pcie); void (*post_deinit)(struct qcom_pcie *pcie); void (*ltssm_enable)(struct qcom_pcie *pcie); + int (*config_sid)(struct qcom_pcie *pcie); }; struct qcom_pcie { @@ -1258,6 +1264,74 @@ static int qcom_pcie_link_up(struct dw_pcie *pci) return !!(val & PCI_EXP_LNKSTA_DLLLA); } +static int qcom_pcie_config_sid_sm8250(struct qcom_pcie *pcie) +{ + /* iommu map structure */ + struct { + u32 bdf; + u32 phandle; + u32 smmu_sid; + u32 smmu_sid_len; + } *map; + void __iomem *bdf_to_sid_base = pcie->parf + PCIE20_PARF_BDF_TO_SID_TABLE_N; + struct device *dev = pcie->pci->dev; + u8 qcom_pcie_crc8_table[CRC8_TABLE_SIZE]; + int i, nr_map, size = 0; + u32 smmu_sid_base; + + of_get_property(dev->of_node, "iommu-map", &size); + if (!size) + return 0; + + map = kzalloc(size, GFP_KERNEL); + if (!map) + return -ENOMEM; + + of_property_read_u32_array(dev->of_node, + "iommu-map", (u32 *)map, size / sizeof(u32)); + + nr_map = size / (sizeof(*map)); + + crc8_populate_msb(qcom_pcie_crc8_table, QCOM_PCIE_CRC8_POLYNOMIAL); + + /* Registers need to be zero out first */ + memset_io(bdf_to_sid_base, 0, CRC8_TABLE_SIZE * sizeof(u32)); + + /* Look for an available entry to hold the mapping */ + for (i = 0; i < nr_map; i++) { + u16 bdf_be = cpu_to_be16(map[i].bdf); + u32 val; + u8 hash; + + hash = crc8(qcom_pcie_crc8_table, (u8 *)&bdf_be, sizeof(bdf_be), + 0); + + val = readl(bdf_to_sid_base + hash * sizeof(u32)); + + /* If the register is already populated, look for next available entry */ + while (val) { + u8 current_hash = hash++; + u8 next_mask = 0xff; + + /* If NEXT field is NULL then update it with next hash */ + if (!(val & next_mask)) { + val |= (u32)hash; + writel(val, bdf_to_sid_base + current_hash * sizeof(u32)); + } + + val = readl(bdf_to_sid_base + hash * sizeof(u32)); + } + + /* BDF [31:16] | SID [15:8] | NEXT [7:0] */ + val = map[i].bdf << 16 | (map[i].smmu_sid - smmu_sid_base) << 8 | 0; + writel(val, bdf_to_sid_base + hash * sizeof(u32)); + } + + kfree(map); + + return 0; +} + static int qcom_pcie_host_init(struct pcie_port *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); @@ -1282,8 +1356,18 @@ static int qcom_pcie_host_init(struct pcie_port *pp) qcom_ep_reset_deassert(pcie); + if (pcie->ops->config_sid) { + ret = pcie->ops->config_sid(pcie); + if (ret) + goto err; + } + return 0; +err: + qcom_ep_reset_assert(pcie); + if (pcie->ops->post_deinit) + pcie->ops->post_deinit(pcie); err_disable_phy: phy_power_off(pcie->phy); err_deinit: @@ -1356,6 +1440,7 @@ static const struct qcom_pcie_ops ops_1_9_0 = { .ltssm_enable = qcom_pcie_2_3_2_ltssm_enable, .post_init = qcom_pcie_post_init_2_7_0, .post_deinit = qcom_pcie_post_deinit_2_7_0, + .config_sid = qcom_pcie_config_sid_sm8250, }; static const struct dw_pcie_ops dw_pcie_ops = {