Commit b29b4249 authored by Peng Fan's avatar Peng Fan Committed by Bjorn Andersson
Browse files

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: default avatarRichard Zhu <hongxing.zhu@nxp.com>
Reviewed-by: default avatarMathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: default avatarPeng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/1615029865-23312-8-git-send-email-peng.fan@oss.nxp.com


Signed-off-by: default avatarBjorn Andersson <bjorn.andersson@linaro.org>
parent ecadcc47

drivers/remoteproc/imx_rproc.c

+93 −0
Original line number Diff line number Diff line
@@ -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,