remoteproc: imx_rproc: add i.MX specific parse fw hook

The hook is used to parse memory-regions and load resource table
from the address the remote processor published.

Reviewed-by: Richard Zhu <[email protected]>
Reviewed-by: Mathieu Poirier <[email protected]>
Signed-off-by: Peng Fan <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Bjorn Andersson <[email protected]>

drivers/remoteproc/imx_rproc.c

@@ -10,6 +10,7 @@
 #include <linux/mfd/syscon.h>
 #include <linux/module.h>
 #include <linux/of_address.h>
+#include <linux/of_reserved_mem.h>
 #include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/regmap.h>
@@ -241,10 +242,102 @@ static void *imx_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *i
 	return va;
 }
 
+static int imx_rproc_mem_alloc(struct rproc *rproc,
+			       struct rproc_mem_entry *mem)
+{
+	struct device *dev = rproc->dev.parent;
+	void *va;
+
+	dev_dbg(dev, "map memory: %p+%zx\n", &mem->dma, mem->len);
+	va = ioremap_wc(mem->dma, mem->len);
+	if (IS_ERR_OR_NULL(va)) {
+		dev_err(dev, "Unable to map memory region: %p+%zx\n",
+			&mem->dma, mem->len);
+		return -ENOMEM;
+	}
+
+	/* Update memory entry va */
+	mem->va = va;
+
+	return 0;
+}
+
+static int imx_rproc_mem_release(struct rproc *rproc,
+				 struct rproc_mem_entry *mem)
+{
+	dev_dbg(rproc->dev.parent, "unmap memory: %pa\n", &mem->dma);
+	iounmap(mem->va);
+
+	return 0;
+}
+
+static int imx_rproc_parse_memory_regions(struct rproc *rproc)
+{
+	struct imx_rproc *priv = rproc->priv;
+	struct device_node *np = priv->dev->of_node;
+	struct of_phandle_iterator it;
+	struct rproc_mem_entry *mem;
+	struct reserved_mem *rmem;
+	u32 da;
+
+	/* Register associated reserved memory regions */
+	of_phandle_iterator_init(&it, np, "memory-region", NULL, 0);
+	while (of_phandle_iterator_next(&it) == 0) {
+		/*
+		 * Ignore the first memory region which will be used vdev buffer.
+		 * No need to do extra handlings, rproc_add_virtio_dev will handle it.
+		 */
+		if (!strcmp(it.node->name, "vdev0buffer"))
+			continue;
+
+		rmem = of_reserved_mem_lookup(it.node);
+		if (!rmem) {
+			dev_err(priv->dev, "unable to acquire memory-region\n");
+			return -EINVAL;
+		}
+
+		/* No need to translate pa to da, i.MX use same map */
+		da = rmem->base;
+
+		/* Register memory region */
+		mem = rproc_mem_entry_init(priv->dev, NULL, (dma_addr_t)rmem->base, rmem->size, da,
+					   imx_rproc_mem_alloc, imx_rproc_mem_release,
+					   it.node->name);
+
+		if (mem)
+			rproc_coredump_add_segment(rproc, da, rmem->size);
+		else
+			return -ENOMEM;
+
+		rproc_add_carveout(rproc, mem);
+	}
+
+	return  0;
+}
+
+static int imx_rproc_parse_fw(struct rproc *rproc, const struct firmware *fw)
+{
+	int ret = imx_rproc_parse_memory_regions(rproc);
+
+	if (ret)
+		return ret;
+
+	ret = rproc_elf_load_rsc_table(rproc, fw);
+	if (ret)
+		dev_info(&rproc->dev, "No resource table in elf\n");
+
+	return 0;
+}
+
 static const struct rproc_ops imx_rproc_ops = {
 	.start		= imx_rproc_start,
 	.stop		= imx_rproc_stop,
 	.da_to_va       = imx_rproc_da_to_va,
+	.load		= rproc_elf_load_segments,
+	.parse_fw	= imx_rproc_parse_fw,
+	.find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table,
+	.sanity_check	= rproc_elf_sanity_check,
+	.get_boot_addr	= rproc_elf_get_boot_addr,
 };
 
 static int imx_rproc_addr_init(struct imx_rproc *priv,