From patchwork Thu Jul 18 05:12:57 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prudhvi Yarlagadda X-Patchwork-Id: 813237 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AD86A40875; Thu, 18 Jul 2024 05:14:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.180.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721279661; cv=none; b=UoXWoy8S2QydLBnVf0TGHL0eklX13/u0OGB6l6uvQlqd+L84Jt7VXvRPQR0pr807TcCCSvRIPe+XIMNTmeVYQnY3RUJ655JSROHQTQnOpUPjbPRi8nBbfSBHgSx+xzYLEr2117UZAto8//d/w2r0Ws9nP5MM86r6xR0F0hMCp1I= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721279661; c=relaxed/simple; bh=2kx/Q+x5sjsXZhabUVsXGvQDFVCh7Hab1940FLSxm+0=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=JtcFho44KKgoSIvhwIIHZp+j87RQRJ5omsn2DKKWAfO+C+QOtEj1xVlqyIfdn3VvC6aagXQ8F2XKNEPgnT9/PTB2shk0V5ksu6sivanGk045m3GQ6ebSQtu7bd5TVkH7QHPqsi0/ihZNYExQcB5/USuNjRzv/CFR0WNAdBog0aM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com; spf=pass smtp.mailfrom=quicinc.com; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b=n45wJRbp; arc=none smtp.client-ip=205.220.180.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=quicinc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="n45wJRbp" Received: from pps.filterd (m0279868.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 46I3NeZL024353; Thu, 18 Jul 2024 05:14:09 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=qcppdkim1; bh= rx56ZxTqUMiXA5M46CXrPcZe14wpPojqezS5K79kgFM=; b=n45wJRbpieiZRDY1 uXJN+PAZkUho7l91U/qEdCVtmPFrooUBfSh8NobDnaQ08H39qbevX74KDah2H7Jy BGtszumDVVaVOKMXdDIOKN1JAtP1TAuUb+1ilNTkGYzu3lnARheHidh0BGY17MpP x9yl5j5GMTWl/I975TFR7QinEydjPCHMvpUgzpyu+LedQF9V9AsAcTVszUAhyoG+ s+QxLbMnu1n7HgNKRpfIaEaa5Y4o/3wJSma1FPY8Bqcvxw4fRKUtjU3uaCIBKqhS R82rg4sOTafHEgf/rrQR5wO7JMhL+4LqFYGF7tPqWvC7t4wPTnT/P9tj2SEJES2X jFykiA== Received: from nasanppmta01.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 40dwfu4dfw-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 18 Jul 2024 05:14:09 +0000 (GMT) Received: from nasanex01b.na.qualcomm.com (nasanex01b.na.qualcomm.com [10.46.141.250]) by NASANPPMTA01.qualcomm.com (8.17.1.19/8.17.1.19) with ESMTPS id 46I5E8o9026481 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 18 Jul 2024 05:14:08 GMT Received: from hu-pyarlaga-lv.qualcomm.com (10.49.16.6) by nasanex01b.na.qualcomm.com (10.46.141.250) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Wed, 17 Jul 2024 22:14:08 -0700 From: Prudhvi Yarlagadda To: , , , , , CC: , , , , Subject: [PATCH v2 1/2] PCI: dwc: Add dbi_phys_addr and atu_phys_addr to struct dw_pcie Date: Wed, 17 Jul 2024 22:12:57 -0700 Message-ID: <20240718051258.1115271-2-quic_pyarlaga@quicinc.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240718051258.1115271-1-quic_pyarlaga@quicinc.com> References: <20240718051258.1115271-1-quic_pyarlaga@quicinc.com> Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: nalasex01c.na.qualcomm.com (10.47.97.35) To nasanex01b.na.qualcomm.com (10.46.141.250) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: B5IGtcJ1npUfGxLSPhY07pBANnD3K83V X-Proofpoint-ORIG-GUID: B5IGtcJ1npUfGxLSPhY07pBANnD3K83V X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-07-18_02,2024-07-17_02,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=802 phishscore=0 spamscore=0 suspectscore=0 adultscore=0 clxscore=1015 mlxscore=0 priorityscore=1501 lowpriorityscore=0 bulkscore=0 malwarescore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2407110000 definitions=main-2407180034 Both DBI and ATU physical base addresses are needed by pcie_qcom.c driver to program the location of DBI and ATU blocks in Qualcomm PCIe Controller specific PARF hardware block. Signed-off-by: Prudhvi Yarlagadda --- drivers/pci/controller/dwc/pcie-designware.c | 2 ++ drivers/pci/controller/dwc/pcie-designware.h | 2 ++ 2 files changed, 4 insertions(+) diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c index 1b5aba1f0c92..bc3a5d6b0177 100644 --- a/drivers/pci/controller/dwc/pcie-designware.c +++ b/drivers/pci/controller/dwc/pcie-designware.c @@ -112,6 +112,7 @@ int dw_pcie_get_resources(struct dw_pcie *pci) pci->dbi_base = devm_pci_remap_cfg_resource(pci->dev, res); if (IS_ERR(pci->dbi_base)) return PTR_ERR(pci->dbi_base); + pci->dbi_phys_addr = res->start; } /* DBI2 is mainly useful for the endpoint controller */ @@ -134,6 +135,7 @@ int dw_pcie_get_resources(struct dw_pcie *pci) pci->atu_base = devm_ioremap_resource(pci->dev, res); if (IS_ERR(pci->atu_base)) return PTR_ERR(pci->atu_base); + pci->atu_phys_addr = res->start; } else { pci->atu_base = pci->dbi_base + DEFAULT_DBI_ATU_OFFSET; } diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index 53c4c8f399c8..efc72989330c 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -407,8 +407,10 @@ struct dw_pcie_ops { struct dw_pcie { struct device *dev; void __iomem *dbi_base; + phys_addr_t dbi_phys_addr; void __iomem *dbi_base2; void __iomem *atu_base; + phys_addr_t atu_phys_addr; size_t atu_size; u32 num_ib_windows; u32 num_ob_windows; From patchwork Thu Jul 18 05:12:58 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prudhvi Yarlagadda X-Patchwork-Id: 813644 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0189F4AEE6; Thu, 18 Jul 2024 05:17:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.180.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721279844; cv=none; b=H9E1lx7sdElZcHn05ut5clJF/hvSQre0BZy9sFe+Tdbj9Tu6kgQZImCiannctw38N/h6Lot+paTr2/2k4HctmmxP+Xxf0kVgY9Nz2wZbeRGdh4ujwfAv+jkK2kXzB9nQDu7aQ6WkiHbp6eNHpkEL18OgVqSuZg8qLqJi6b6d8cE= ARC-Message-Signature: i=1; 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Thu, 18 Jul 2024 05:14:09 GMT Received: from hu-pyarlaga-lv.qualcomm.com (10.49.16.6) by nasanex01b.na.qualcomm.com (10.46.141.250) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Wed, 17 Jul 2024 22:14:08 -0700 From: Prudhvi Yarlagadda To: , , , , , CC: , , , , Subject: [PATCH v2 2/2] PCI: qcom: Avoid DBI and ATU register space mirror to BAR/MMIO region Date: Wed, 17 Jul 2024 22:12:58 -0700 Message-ID: <20240718051258.1115271-3-quic_pyarlaga@quicinc.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240718051258.1115271-1-quic_pyarlaga@quicinc.com> References: <20240718051258.1115271-1-quic_pyarlaga@quicinc.com> Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: nalasex01c.na.qualcomm.com (10.47.97.35) To nasanex01b.na.qualcomm.com (10.46.141.250) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: Anxp24JbzfT8tXhvzINdCnQBdNN3hML5 X-Proofpoint-GUID: Anxp24JbzfT8tXhvzINdCnQBdNN3hML5 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-07-18_02,2024-07-17_02,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 adultscore=0 phishscore=0 spamscore=0 mlxscore=0 lowpriorityscore=0 impostorscore=0 suspectscore=0 mlxlogscore=999 priorityscore=1501 bulkscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2407110000 definitions=main-2407180034 PARF hardware block which is a wrapper on top of DWC PCIe controller mirrors the DBI and ATU register space. It uses PARF_SLV_ADDR_SPACE_SIZE register to get the size of the memory block to be mirrored and uses PARF_DBI_BASE_ADDR, PARF_ATU_BASE_ADDR registers to determine the base address of DBI and ATU space inside the memory block that is being mirrored. When a memory region which is located above the SLV_ADDR_SPACE_SIZE boundary is used for BAR region then there could be an overlap of DBI and ATU address space that is getting mirrored and the BAR region. This results in DBI and ATU address space contents getting updated when a PCIe function driver tries updating the BAR/MMIO memory region. Reference memory map of the PCIe memory region with DBI and ATU address space overlapping BAR region is as below. |---------------| | | | | ------- --------|---------------| | | |---------------| | | | DBI | | | |---------------|---->DBI_BASE_ADDR | | | | | | | | | PCIe | |---->2*SLV_ADDR_SPACE_SIZE | BAR/MMIO|---------------| | Region | ATU | | | |---------------|---->ATU_BASE_ADDR | | | | PCIe | |---------------| Memory | | DBI | Region | |---------------|---->DBI_BASE_ADDR | | | | | --------| | | | |---->SLV_ADDR_SPACE_SIZE | |---------------| | | ATU | | |---------------|---->ATU_BASE_ADDR | | | | |---------------| | | DBI | | |---------------|---->DBI_BASE_ADDR | | | | | | ----------------|---------------| | | | | | | |---------------| Currently memory region beyond the SLV_ADDR_SPACE_SIZE boundary is not used for BAR region which is why the above mentioned issue is not encountered. This issue is discovered as part of internal testing when we tried moving the BAR region beyond the SLV_ADDR_SPACE_SIZE boundary. Hence we are trying to fix this. As PARF hardware block mirrors DBI and ATU register space after every PARF_SLV_ADDR_SPACE_SIZE (default 0x1000000) boundary multiple, write U32_MAX (all 0xFF's) to PARF_SLV_ADDR_SPACE_SIZE register to avoid mirroring DBI and ATU to BAR/MMIO region. Write the physical base address of DBI and ATU register blocks to PARF_DBI_BASE_ADDR (default 0x0) and PARF_ATU_BASE_ADDR (default 0x1000) respectively to make sure DBI and ATU blocks are at expected memory locations. The register offsets PARF_DBI_BASE_ADDR_V2, PARF_SLV_ADDR_SPACE_SIZE_V2 and PARF_ATU_BASE_ADDR are applicable for platforms that use PARF Qcom IP rev 1.9.0, 2.7.0 and 2.9.0. PARF_DBI_BASE_ADDR_V2 and PARF_SLV_ADDR_SPACE_SIZE_V2 are applicable for PARF Qcom IP rev 2.3.3. PARF_DBI_BASE_ADDR and PARF_SLV_ADDR_SPACE_SIZE are applicable for PARF Qcom IP rev 1.0.0, 2.3.2 and 2.4.0. Updating the init()/post_init() functions of the respective PARF versions to program applicable PARF_DBI_BASE_ADDR, PARF_SLV_ADDR_SPACE_SIZE and PARF_ATU_BASE_ADDR register offsets. And remove the unused SLV_ADDR_SPACE_SZ macro. Signed-off-by: Prudhvi Yarlagadda --- drivers/pci/controller/dwc/pcie-qcom.c | 62 +++++++++++++++++++------- 1 file changed, 45 insertions(+), 17 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c index 0180edf3310e..845c7641431f 100644 --- a/drivers/pci/controller/dwc/pcie-qcom.c +++ b/drivers/pci/controller/dwc/pcie-qcom.c @@ -45,6 +45,7 @@ #define PARF_PHY_REFCLK 0x4c #define PARF_CONFIG_BITS 0x50 #define PARF_DBI_BASE_ADDR 0x168 +#define PARF_SLV_ADDR_SPACE_SIZE 0x16C #define PARF_MHI_CLOCK_RESET_CTRL 0x174 #define PARF_AXI_MSTR_WR_ADDR_HALT 0x178 #define PARF_AXI_MSTR_WR_ADDR_HALT_V2 0x1a8 @@ -52,8 +53,13 @@ #define PARF_LTSSM 0x1b0 #define PARF_SID_OFFSET 0x234 #define PARF_BDF_TRANSLATE_CFG 0x24c -#define PARF_SLV_ADDR_SPACE_SIZE 0x358 +#define PARF_DBI_BASE_ADDR_V2 0x350 +#define PARF_DBI_BASE_ADDR_V2_HI 0x354 +#define PARF_SLV_ADDR_SPACE_SIZE_V2 0x358 +#define PARF_SLV_ADDR_SPACE_SIZE_V2_HI 0x35C #define PARF_NO_SNOOP_OVERIDE 0x3d4 +#define PARF_ATU_BASE_ADDR 0x634 +#define PARF_ATU_BASE_ADDR_HI 0x638 #define PARF_DEVICE_TYPE 0x1000 #define PARF_BDF_TO_SID_TABLE_N 0x2000 #define PARF_BDF_TO_SID_CFG 0x2c00 @@ -107,9 +113,6 @@ /* PARF_CONFIG_BITS register fields */ #define PHY_RX0_EQ(x) FIELD_PREP(GENMASK(26, 24), x) -/* PARF_SLV_ADDR_SPACE_SIZE register value */ -#define SLV_ADDR_SPACE_SZ 0x10000000 - /* PARF_MHI_CLOCK_RESET_CTRL register fields */ #define AHB_CLK_EN BIT(0) #define MSTR_AXI_CLK_EN BIT(1) @@ -324,6 +327,39 @@ static void qcom_pcie_clear_hpc(struct dw_pcie *pci) dw_pcie_dbi_ro_wr_dis(pci); } +static void qcom_pcie_configure_dbi_base(struct qcom_pcie *pcie) +{ + struct dw_pcie *pci = pcie->pci; + + if (pci->dbi_phys_addr) + writel(lower_32_bits(pci->dbi_phys_addr), pcie->parf + + PARF_DBI_BASE_ADDR); + + writel(U32_MAX, pcie->parf + PARF_SLV_ADDR_SPACE_SIZE); +} + +static void qcom_pcie_configure_dbi_atu_base(struct qcom_pcie *pcie) +{ + struct dw_pcie *pci = pcie->pci; + + if (pci->dbi_phys_addr) { + writel(lower_32_bits(pci->dbi_phys_addr), pcie->parf + + PARF_DBI_BASE_ADDR_V2); + writel(upper_32_bits(pci->dbi_phys_addr), pcie->parf + + PARF_DBI_BASE_ADDR_V2_HI); + } + + if (pci->atu_phys_addr) { + writel(lower_32_bits(pci->atu_phys_addr), pcie->parf + + PARF_ATU_BASE_ADDR); + writel(upper_32_bits(pci->atu_phys_addr), pcie->parf + + PARF_ATU_BASE_ADDR_HI); + } + + writel(U32_MAX, pcie->parf + PARF_SLV_ADDR_SPACE_SIZE_V2); + writel(U32_MAX, pcie->parf + PARF_SLV_ADDR_SPACE_SIZE_V2_HI); +} + static void qcom_pcie_2_1_0_ltssm_enable(struct qcom_pcie *pcie) { u32 val; @@ -540,8 +576,7 @@ static int qcom_pcie_init_1_0_0(struct qcom_pcie *pcie) static int qcom_pcie_post_init_1_0_0(struct qcom_pcie *pcie) { - /* change DBI base address */ - writel(0, pcie->parf + PARF_DBI_BASE_ADDR); + qcom_pcie_configure_dbi_base(pcie); if (IS_ENABLED(CONFIG_PCI_MSI)) { u32 val = readl(pcie->parf + PARF_AXI_MSTR_WR_ADDR_HALT); @@ -628,8 +663,7 @@ static int qcom_pcie_post_init_2_3_2(struct qcom_pcie *pcie) val &= ~PHY_TEST_PWR_DOWN; writel(val, pcie->parf + PARF_PHY_CTRL); - /* change DBI base address */ - writel(0, pcie->parf + PARF_DBI_BASE_ADDR); + qcom_pcie_configure_dbi_base(pcie); /* MAC PHY_POWERDOWN MUX DISABLE */ val = readl(pcie->parf + PARF_SYS_CTRL); @@ -811,13 +845,11 @@ static int qcom_pcie_post_init_2_3_3(struct qcom_pcie *pcie) u16 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP); u32 val; - writel(SLV_ADDR_SPACE_SZ, pcie->parf + PARF_SLV_ADDR_SPACE_SIZE); - val = readl(pcie->parf + PARF_PHY_CTRL); val &= ~PHY_TEST_PWR_DOWN; writel(val, pcie->parf + PARF_PHY_CTRL); - writel(0, pcie->parf + PARF_DBI_BASE_ADDR); + qcom_pcie_configure_dbi_atu_base(pcie); writel(MST_WAKEUP_EN | SLV_WAKEUP_EN | MSTR_ACLK_CGC_DIS | SLV_ACLK_CGC_DIS | CORE_CLK_CGC_DIS | @@ -913,8 +945,7 @@ static int qcom_pcie_init_2_7_0(struct qcom_pcie *pcie) val &= ~PHY_TEST_PWR_DOWN; writel(val, pcie->parf + PARF_PHY_CTRL); - /* change DBI base address */ - writel(0, pcie->parf + PARF_DBI_BASE_ADDR); + qcom_pcie_configure_dbi_atu_base(pcie); /* MAC PHY_POWERDOWN MUX DISABLE */ val = readl(pcie->parf + PARF_SYS_CTRL); @@ -1123,14 +1154,11 @@ static int qcom_pcie_post_init_2_9_0(struct qcom_pcie *pcie) u32 val; int i; - writel(SLV_ADDR_SPACE_SZ, - pcie->parf + PARF_SLV_ADDR_SPACE_SIZE); - val = readl(pcie->parf + PARF_PHY_CTRL); val &= ~PHY_TEST_PWR_DOWN; writel(val, pcie->parf + PARF_PHY_CTRL); - writel(0, pcie->parf + PARF_DBI_BASE_ADDR); + qcom_pcie_configure_dbi_atu_base(pcie); writel(DEVICE_TYPE_RC, pcie->parf + PARF_DEVICE_TYPE); writel(BYPASS | MSTR_AXI_CLK_EN | AHB_CLK_EN,