Le 08/01/2025 à 14:47, Luo Jie a écrit :
The PPE (Packet Process Engine) hardware block is available
on Qualcomm IPQ SoC that support PPE architecture, such as
IPQ9574.
The PPE in IPQ9574 includes six integrated ethernet MAC
(for 6 PPE ports), buffer management, queue management and
scheduler functions. The MACs can connect with the external
PHY or switch devices using the UNIPHY PCS block available
in the SoC.
The PPE also includes various packet processing offload
capabilities such as L3 routing and L2 bridging, VLAN and
tunnel processing offload. It also includes Ethernet DMA
function for transferring packets between ARM cores and
PPE ethernet ports.
This patch adds the base source files and Makefiles for
the PPE driver such as platform driver registration,
clock initialization, and PPE reset routines.
Signed-off-by: Luo Jie <quic_luoj@xxxxxxxxxxx>
---
...
+static int qcom_ppe_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct ppe_device *ppe_dev;
+ void __iomem *base;
+ int ret, num_icc;
+
+ num_icc = ARRAY_SIZE(ppe_icc_data);
+ ppe_dev = devm_kzalloc(dev, struct_size(ppe_dev, icc_paths, num_icc),
+ GFP_KERNEL);
+ if (!ppe_dev)
+ return dev_err_probe(dev, -ENOMEM, "PPE alloc memory failed\n");
Usually, no error message in logged in case of devm_kzalloc().
It is already loud enough.
+
+ base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(base))
+ return dev_err_probe(dev, PTR_ERR(base), "PPE ioremap failed\n");
+
+ ppe_dev->regmap = devm_regmap_init_mmio(dev, base, ®map_config_ipq9574);
+ if (IS_ERR(ppe_dev->regmap))
+ return dev_err_probe(dev, PTR_ERR(ppe_dev->regmap),
+ "PPE initialize regmap failed\n");
+ ppe_dev->dev = dev;
+ ppe_dev->clk_rate = PPE_CLK_RATE;
+ ppe_dev->num_ports = PPE_PORT_MAX;
+ ppe_dev->num_icc_paths = num_icc;
+
+ ret = ppe_clock_init_and_reset(ppe_dev);
+ if (ret)
+ return dev_err_probe(dev, ret, "PPE clock config failed\n");
+
+ platform_set_drvdata(pdev, ppe_dev);
+
+ return 0;
+}
+
+static const struct of_device_id qcom_ppe_of_match[] = {
+ { .compatible = "qcom,ipq9574-ppe" },
+ {},
The ending comma after a terminator like that is not needed.
+};
...
CJ
