linux-kernel - [PATCH v4 08/11] remoteproc: stm32: Split function stm32_rproc_parse

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Message-Id: <20200601175552.22286-9-mathieu.poirier@linaro.org>
Date:   Mon,  1 Jun 2020 11:55:49 -0600
From:   Mathieu Poirier <mathieu.poirier@...aro.org>
To:     bjorn.andersson@...aro.org, ohad@...ery.com,
        mcoquelin.stm32@...il.com, alexandre.torgue@...com
Cc:     loic.pallardy@...com, arnaud.pouliquen@...com,
        linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v4 08/11] remoteproc: stm32: Split function stm32_rproc_parse_fw()

Split function stm32_rproc_parse_fw() in two parts, the first one
to parse the memory regions and the second one to load the
resource table.  That way parsing of the memory regions can be
re-used when attaching to the remote processor.

Mainly based on the work published by Arnaud Pouliquen [1].

[1]. https://patchwork.kernel.org/project/linux-remoteproc/list/?series=239877

Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org>
Reviewed-by: Loic Pallardy <loic.pallardy@...com>
---
 drivers/remoteproc/stm32_rproc.c | 23 ++++++++++++++++++++---
 1 file changed, 20 insertions(+), 3 deletions(-)

diff --git a/drivers/remoteproc/stm32_rproc.c b/drivers/remoteproc/stm32_rproc.c
index 2154c8b90a2a..9316ce3b03c2 100644
--- a/drivers/remoteproc/stm32_rproc.c
+++ b/drivers/remoteproc/stm32_rproc.c
@@ -212,7 +212,7 @@ static int stm32_rproc_elf_load_rsc_table(struct rproc *rproc,
 	return 0;
 }
 
-static int stm32_rproc_parse_fw(struct rproc *rproc, const struct firmware *fw)
+static int stm32_rproc_parse_memory_regions(struct rproc *rproc)
 {
 	struct device *dev = rproc->dev.parent;
 	struct device_node *np = dev->of_node;
@@ -265,6 +265,16 @@ static int stm32_rproc_parse_fw(struct rproc *rproc, const struct firmware *fw)
 		index++;
 	}
 
+	return 0;
+}
+
+static int stm32_rproc_parse_fw(struct rproc *rproc, const struct firmware *fw)
+{
+	int ret = stm32_rproc_parse_memory_regions(rproc);
+
+	if (ret)
+		return ret;
+
 	return stm32_rproc_elf_load_rsc_table(rproc, fw);
 }
 
@@ -692,15 +702,20 @@ static int stm32_rproc_probe(struct platform_device *pdev)
 	if (ret)
 		goto free_rproc;
 
-	if (state == M4_STATE_CRUN)
+	if (state == M4_STATE_CRUN) {
 		rproc->state = RPROC_DETACHED;
 
+		ret = stm32_rproc_parse_memory_regions(rproc);
+		if (ret)
+			goto free_resources;
+	}
+
 	rproc->has_iommu = false;
 	ddata->workqueue = create_workqueue(dev_name(dev));
 	if (!ddata->workqueue) {
 		dev_err(dev, "cannot create workqueue\n");
 		ret = -ENOMEM;
-		goto free_rproc;
+		goto free_resources;
 	}
 
 	platform_set_drvdata(pdev, rproc);
@@ -719,6 +734,8 @@ static int stm32_rproc_probe(struct platform_device *pdev)
 	stm32_rproc_free_mbox(rproc);
 free_wkq:
 	destroy_workqueue(ddata->workqueue);
+free_resources:
+	rproc_resource_cleanup(rproc);
 free_rproc:
 	if (device_may_wakeup(dev)) {
 		dev_pm_clear_wake_irq(dev);
-- 
2.20.1