Re: [PATCH 2/2] remoteproc: qcom: add hexagon based WCSS secure PIL driver

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On 8/20/2024 4:55 PM, Krzysztof Kozlowski wrote:
On Tue, Aug 20, 2024 at 02:25:15PM +0530, Gokul Sriram Palanisamy wrote:
From: Vignesh Viswanathan <quic_viswanat@xxxxxxxxxxx>

Add support to bring up hexagon based WCSS secure PIL remoteproc.
IPQ5332, IPQ9574 supports secure PIL remoteproc.

Signed-off-by: Vignesh Viswanathan <quic_viswanat@xxxxxxxxxxx>
Signed-off-by: Manikanta Mylavarapu <quic_mmanikan@xxxxxxxxxxx>
Signed-off-by: Gokul Sriram Palanisamy <quic_gokulsri@xxxxxxxxxxx>
+static int wcss_sec_dump_segments(struct rproc *rproc,
+				  const struct firmware *fw)
+{
+	struct device *dev = rproc->dev.parent;
+	struct reserved_mem *rmem = NULL;
+	struct device_node *node;
+	int num_segs, index = 0;
+	int ret;
+
+	/* Parse through additional reserved memory regions for the rproc
+	 * and add them to the coredump segments
+	 */
+	num_segs = of_count_phandle_with_args(dev->of_node,
+					      "memory-region", NULL);
+	while (index < num_segs) {
+		node = of_parse_phandle(dev->of_node,
+					"memory-region", index);
+		if (!node)
+			return -EINVAL;
+
+		rmem = of_reserved_mem_lookup(node);
+		if (!rmem) {
+			dev_err(dev, "unable to acquire memory-region index %d num_segs %d\n",
+				index, num_segs);
Leaking refcnt.
Got it. Will update. Thank you.
+			return -EINVAL;
+		}
+
+		of_node_put(node);
+
+		dev_dbg(dev, "Adding segment 0x%pa size 0x%pa",
+			&rmem->base, &rmem->size);
+		ret = rproc_coredump_add_custom_segment(rproc,
+							rmem->base,
+							rmem->size,
+							wcss_sec_copy_segment,
+							NULL);
+		if (ret)
+			return ret;
+
+		index++;
+	}
+
+	return 0;
+}
+
+static const struct rproc_ops wcss_sec_ops = {
+	.start = wcss_sec_start,
+	.stop = wcss_sec_stop,
+	.da_to_va = wcss_sec_da_to_va,
+	.load = wcss_sec_load,
+	.get_boot_addr = rproc_elf_get_boot_addr,
+	.panic = wcss_sec_panic,
+	.parse_fw = wcss_sec_dump_segments,
+};
+
+static int wcss_sec_alloc_memory_region(struct wcss_sec *wcss)
+{
+	struct reserved_mem *rmem = NULL;
+	struct device_node *node;
+	struct device *dev = wcss->dev;
+
+	node = of_parse_phandle(dev->of_node, "memory-region", 0);
+	if (node) {
+		rmem = of_reserved_mem_lookup(node);
+	} else {
No, that's over complicated.

Just if (!node) { error handling }.
Ok. Will update.
+		dev_err(dev, "can't find phandle memory-region\n");
+		return -EINVAL;
+	}
+
+	of_node_put(node);
+
+	if (!rmem) {
+		dev_err(dev, "unable to acquire memory-region\n");
+		return -EINVAL;
+	}
+
+	wcss->mem_phys = rmem->base;
+	wcss->mem_reloc = rmem->base;
+	wcss->mem_size = rmem->size;
+	wcss->mem_region = devm_ioremap_wc(dev, wcss->mem_phys, wcss->mem_size);
+	if (!wcss->mem_region) {
+		dev_err(dev, "unable to map memory region: %pa+%pa\n",
+			&rmem->base, &rmem->size);
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
...

+static int wcss_sec_ipq5332_init_clk(struct wcss_sec *wcss)
+{
+	int ret;
+	struct device *dev = wcss->dev;
+
+	wcss->im_sleep = devm_clk_get(wcss->dev, "im_sleep");
+	if (IS_ERR(wcss->im_sleep)) {
+		ret = PTR_ERR(wcss->im_sleep);
+		if (ret != -EPROBE_DEFER)
+			dev_err(dev, "failed to get im_sleep clock");
Syntax is return dev_err_probe.
Thanks. Will update.
+		return ret;
+	}
+
+	ret = clk_prepare_enable(wcss->im_sleep);
+	if (ret) {
+		dev_err(dev, "could not enable im_sleep clk\n");
+		return ret;
Just use devm_clk_get_enabled.
Will update.
+	}
+
+	return 0;
Best regards,
Krzysztof





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