diff mbox series

[V2,4/4] remoteproc: imx_rproc: support remote cores booted before Linux Kernel

Message ID 1617082235-15923-5-git-send-email-peng.fan@oss.nxp.com (mailing list archive)
State New, archived
Headers show
Series remoteproc: imx: support remote cores booted early | expand

Commit Message

Peng Fan (OSS) March 30, 2021, 5:30 a.m. UTC
From: Peng Fan <peng.fan@nxp.com>

 - Add rsc_table to hold the resource table published by remote cores.
 - Add attach hook.
 - Add imx_rproc_get_loaded_rsc_table to get resource table published by
   remote processors.
 - Add imx_rproc_detect_mode to detect remote cores' working mode.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
 drivers/remoteproc/imx_rproc.c | 45 ++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

Comments

Mathieu Poirier April 7, 2021, 5:03 p.m. UTC | #1
On Tue, Mar 30, 2021 at 01:30:35PM +0800, peng.fan@oss.nxp.com wrote:
> From: Peng Fan <peng.fan@nxp.com>
> 
>  - Add rsc_table to hold the resource table published by remote cores.
>  - Add attach hook.
>  - Add imx_rproc_get_loaded_rsc_table to get resource table published by
>    remote processors.
>  - Add imx_rproc_detect_mode to detect remote cores' working mode.
>

This is describing _what_ is being done rather than _why_ it is done.

Moreover for patches 1 an 3 the subject line is tagged with "imx" while patches
2 and 4 have "imx_rproc".  I don't mind which one is used as long as it is
consistent.
 
> Signed-off-by: Peng Fan <peng.fan@nxp.com>
> ---
>  drivers/remoteproc/imx_rproc.c | 45 ++++++++++++++++++++++++++++++++++
>  1 file changed, 45 insertions(+)
> 
> diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
> index 7cd09971d1a4..d6338872c6db 100644
> --- a/drivers/remoteproc/imx_rproc.c
> +++ b/drivers/remoteproc/imx_rproc.c
> @@ -95,6 +95,7 @@ struct imx_rproc {
>  	struct mbox_chan		*rx_ch;
>  	struct work_struct		rproc_work;
>  	struct workqueue_struct		*workqueue;
> +	void __iomem			*rsc_table;
>  };
>  
>  static const struct imx_rproc_att imx_rproc_att_imx8mq[] = {
> @@ -395,8 +396,26 @@ static void imx_rproc_kick(struct rproc *rproc, int vqid)
>  			__func__, vqid, err);
>  }
>  
> +static int imx_rproc_attach(struct rproc *rproc)
> +{
> +	return 0;
> +}
> +
> +static struct resource_table *imx_rproc_get_loaded_rsc_table(struct rproc *rproc, size_t *table_sz)
> +{
> +	struct imx_rproc *priv = rproc->priv;
> +
> +	/* The resource table has already been mapped in imx_rproc_addr_init */
> +	if (!priv->rsc_table)
> +		return NULL;
> +
> +	*table_sz = SZ_1K;
> +	return (struct resource_table *)priv->rsc_table;
> +}
> +
>  static const struct rproc_ops imx_rproc_ops = {
>  	.prepare	= imx_rproc_prepare,
> +	.attach		= imx_rproc_attach,
>  	.start		= imx_rproc_start,
>  	.stop		= imx_rproc_stop,
>  	.kick		= imx_rproc_kick,
> @@ -404,6 +423,7 @@ static const struct rproc_ops imx_rproc_ops = {
>  	.load		= rproc_elf_load_segments,
>  	.parse_fw	= imx_rproc_parse_fw,
>  	.find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table,
> +	.get_loaded_rsc_table = imx_rproc_get_loaded_rsc_table,
>  	.sanity_check	= rproc_elf_sanity_check,
>  	.get_boot_addr	= rproc_elf_get_boot_addr,
>  };
> @@ -470,6 +490,8 @@ static int imx_rproc_addr_init(struct imx_rproc *priv,
>  		}
>  		priv->mem[b].sys_addr = res.start;
>  		priv->mem[b].size = resource_size(&res);
> +		if (!strcmp(node->name, "rsc_table"))
> +			priv->rsc_table = priv->mem[b].cpu_addr;
>  		b++;
>  	}
>  
> @@ -536,6 +558,25 @@ static void imx_rproc_free_mbox(struct rproc *rproc)
>  	mbox_free_channel(priv->rx_ch);
>  }
>  
> +static int imx_rproc_detect_mode(struct imx_rproc *priv)
> +{
> +	const struct imx_rproc_dcfg *dcfg = priv->dcfg;
> +	struct device *dev = priv->dev;
> +	int ret;
> +	u32 val;
> +
> +	ret = regmap_read(priv->regmap, dcfg->src_reg, &val);
> +	if (ret) {
> +		dev_err(dev, "Failed to read src\n");
> +		return ret;
> +	}
> +
> +	if (!(val & dcfg->src_stop))
> +		priv->rproc->state = RPROC_DETACHED;
> +
> +	return 0;
> +}
> +
>  static int imx_rproc_probe(struct platform_device *pdev)
>  {
>  	struct device *dev = &pdev->dev;
> @@ -590,6 +631,10 @@ static int imx_rproc_probe(struct platform_device *pdev)
>  		goto err_put_mbox;
>  	}
>  
> +	ret = imx_rproc_detect_mode(priv);
> +	if (ret)
> +		goto err_put_mbox;
> +

With the above:

Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>

>  	priv->clk = devm_clk_get(dev, NULL);
>  	if (IS_ERR(priv->clk)) {
>  		dev_err(dev, "Failed to get clock\n");
> -- 
> 2.30.0
>
diff mbox series

Patch

diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
index 7cd09971d1a4..d6338872c6db 100644
--- a/drivers/remoteproc/imx_rproc.c
+++ b/drivers/remoteproc/imx_rproc.c
@@ -95,6 +95,7 @@  struct imx_rproc {
 	struct mbox_chan		*rx_ch;
 	struct work_struct		rproc_work;
 	struct workqueue_struct		*workqueue;
+	void __iomem			*rsc_table;
 };
 
 static const struct imx_rproc_att imx_rproc_att_imx8mq[] = {
@@ -395,8 +396,26 @@  static void imx_rproc_kick(struct rproc *rproc, int vqid)
 			__func__, vqid, err);
 }
 
+static int imx_rproc_attach(struct rproc *rproc)
+{
+	return 0;
+}
+
+static struct resource_table *imx_rproc_get_loaded_rsc_table(struct rproc *rproc, size_t *table_sz)
+{
+	struct imx_rproc *priv = rproc->priv;
+
+	/* The resource table has already been mapped in imx_rproc_addr_init */
+	if (!priv->rsc_table)
+		return NULL;
+
+	*table_sz = SZ_1K;
+	return (struct resource_table *)priv->rsc_table;
+}
+
 static const struct rproc_ops imx_rproc_ops = {
 	.prepare	= imx_rproc_prepare,
+	.attach		= imx_rproc_attach,
 	.start		= imx_rproc_start,
 	.stop		= imx_rproc_stop,
 	.kick		= imx_rproc_kick,
@@ -404,6 +423,7 @@  static const struct rproc_ops imx_rproc_ops = {
 	.load		= rproc_elf_load_segments,
 	.parse_fw	= imx_rproc_parse_fw,
 	.find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table,
+	.get_loaded_rsc_table = imx_rproc_get_loaded_rsc_table,
 	.sanity_check	= rproc_elf_sanity_check,
 	.get_boot_addr	= rproc_elf_get_boot_addr,
 };
@@ -470,6 +490,8 @@  static int imx_rproc_addr_init(struct imx_rproc *priv,
 		}
 		priv->mem[b].sys_addr = res.start;
 		priv->mem[b].size = resource_size(&res);
+		if (!strcmp(node->name, "rsc_table"))
+			priv->rsc_table = priv->mem[b].cpu_addr;
 		b++;
 	}
 
@@ -536,6 +558,25 @@  static void imx_rproc_free_mbox(struct rproc *rproc)
 	mbox_free_channel(priv->rx_ch);
 }
 
+static int imx_rproc_detect_mode(struct imx_rproc *priv)
+{
+	const struct imx_rproc_dcfg *dcfg = priv->dcfg;
+	struct device *dev = priv->dev;
+	int ret;
+	u32 val;
+
+	ret = regmap_read(priv->regmap, dcfg->src_reg, &val);
+	if (ret) {
+		dev_err(dev, "Failed to read src\n");
+		return ret;
+	}
+
+	if (!(val & dcfg->src_stop))
+		priv->rproc->state = RPROC_DETACHED;
+
+	return 0;
+}
+
 static int imx_rproc_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -590,6 +631,10 @@  static int imx_rproc_probe(struct platform_device *pdev)
 		goto err_put_mbox;
 	}
 
+	ret = imx_rproc_detect_mode(priv);
+	if (ret)
+		goto err_put_mbox;
+
 	priv->clk = devm_clk_get(dev, NULL);
 	if (IS_ERR(priv->clk)) {
 		dev_err(dev, "Failed to get clock\n");