lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20240318-dw-hdma-v5-4-f04c5cdde760@linaro.org>
Date: Mon, 18 Mar 2024 11:34:28 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: Jingoo Han <jingoohan1@...il.com>, 
 Gustavo Pimentel <gustavo.pimentel@...opsys.com>, 
 Lorenzo Pieralisi <lpieralisi@...nel.org>, 
 Krzysztof WilczyƄski <kw@...ux.com>, 
 Rob Herring <robh@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>, 
 Marek Vasut <marek.vasut+renesas@...il.com>, 
 Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>, 
 Kishon Vijay Abraham I <kishon@...nel.org>
Cc: Serge Semin <fancer.lancer@...il.com>, linux-pci@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-renesas-soc@...r.kernel.org, 
 linux-arm-msm@...r.kernel.org, mhi@...ts.linux.dev, 
 Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>, 
 Mrinmay Sarkar <quic_msarkar@...cinc.com>, 
 Siddharth Vadapalli <s-vadapalli@...com>, Frank Li <Frank.Li@....com>
Subject: [PATCH v5 4/5] PCI: qcom-ep: Add HDMA support for SA8775P SoC

From: Mrinmay Sarkar <quic_msarkar@...cinc.com>

SA8775P SoC supports the new Hyper DMA (HDMA) DMA Engine inside the DWC IP.
Let's add support for it by passing the mapping format and the number of
read/write channels count.

The PCIe EP controller used on this SoC is of version 1.34.0, so a separate
config struct is introduced for the sake of enabling HDMA conditionally.

It should be noted that for the eDMA support (predecessor of HDMA), there
are no mapping format and channels count specified. That is because eDMA
supports auto detection of both parameters, whereas HDMA doesn't.

Signed-off-by: Mrinmay Sarkar <quic_msarkar@...cinc.com>
[mani: Reworded commit message, added kdoc, and minor cleanups]
Reviewed-by: Siddharth Vadapalli <s-vadapalli@...com>
Reviewed-by: Frank Li <Frank.Li@....com>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
---
 drivers/pci/controller/dwc/pcie-qcom-ep.c | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/controller/dwc/pcie-qcom-ep.c b/drivers/pci/controller/dwc/pcie-qcom-ep.c
index 45008e054e31..89d06a3e6e06 100644
--- a/drivers/pci/controller/dwc/pcie-qcom-ep.c
+++ b/drivers/pci/controller/dwc/pcie-qcom-ep.c
@@ -149,6 +149,14 @@ enum qcom_pcie_ep_link_status {
 	QCOM_PCIE_EP_LINK_DOWN,
 };
 
+/**
+ * struct qcom_pcie_ep_cfg - Per SoC config struct
+ * @hdma_support: HDMA support on this SoC
+ */
+struct qcom_pcie_ep_cfg {
+	bool hdma_support;
+};
+
 /**
  * struct qcom_pcie_ep - Qualcomm PCIe Endpoint Controller
  * @pci: Designware PCIe controller struct
@@ -803,6 +811,7 @@ static const struct dw_pcie_ep_ops pci_ep_ops = {
 
 static int qcom_pcie_ep_probe(struct platform_device *pdev)
 {
+	const struct qcom_pcie_ep_cfg *cfg;
 	struct device *dev = &pdev->dev;
 	struct qcom_pcie_ep *pcie_ep;
 	char *name;
@@ -816,6 +825,14 @@ static int qcom_pcie_ep_probe(struct platform_device *pdev)
 	pcie_ep->pci.ops = &pci_ops;
 	pcie_ep->pci.ep.ops = &pci_ep_ops;
 	pcie_ep->pci.edma.nr_irqs = 1;
+
+	cfg = of_device_get_match_data(dev);
+	if (cfg && cfg->hdma_support) {
+		pcie_ep->pci.edma.ll_wr_cnt = 8;
+		pcie_ep->pci.edma.ll_rd_cnt = 8;
+		pcie_ep->pci.edma.mf = EDMA_MF_HDMA_NATIVE;
+	}
+
 	platform_set_drvdata(pdev, pcie_ep);
 
 	ret = qcom_pcie_ep_get_resources(pdev, pcie_ep);
@@ -874,8 +891,12 @@ static void qcom_pcie_ep_remove(struct platform_device *pdev)
 	qcom_pcie_disable_resources(pcie_ep);
 }
 
+static const struct qcom_pcie_ep_cfg cfg_1_34_0 = {
+	.hdma_support = true,
+};
+
 static const struct of_device_id qcom_pcie_ep_match[] = {
-	{ .compatible = "qcom,sa8775p-pcie-ep", },
+	{ .compatible = "qcom,sa8775p-pcie-ep", .data = &cfg_1_34_0},
 	{ .compatible = "qcom,sdx55-pcie-ep", },
 	{ .compatible = "qcom,sm8450-pcie-ep", },
 	{ }

-- 
2.25.1


Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ