This is the preliminary step for probing multi-core SCP.
The initialization procedure for remoteproc is similar for both
single-core and multi-core architectures and is reusing to avoid
redundant code.
Rewrite the probing flow of single-core SCP to adapt with the 'cluster'
concept needed by probing the multi-core SCP. The main differences
are,
- the SCP core object(s) is maintained at the cluster list instead of at
the platform device driver data property.
- save the cluster information at the platform device driver data property.
- In order to keep the compatibility of exported SCP APIs which getting
the SCP core object by SCP node phandle, move the SCP core object
pointers to the platform device platform data property.
The registers of config and l1tcm are shared for multi-core
SCP. Reuse the mapped addresses for all cores.
Signed-off-by: Tinghan Shen <[email protected]>
---
drivers/remoteproc/mtk_common.h | 2 +
drivers/remoteproc/mtk_scp.c | 151 +++++++++++++++++++++++---------
2 files changed, 112 insertions(+), 41 deletions(-)
diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h
index c0905aec3b4b..56395e8664cb 100644
--- a/drivers/remoteproc/mtk_common.h
+++ b/drivers/remoteproc/mtk_common.h
@@ -128,6 +128,8 @@ struct mtk_scp {
size_t dram_size;
struct rproc_subdev *rpmsg_subdev;
+
+ struct list_head elem;
};
/**
diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
index 48e759c2d486..3a8c8bcfa46b 100644
--- a/drivers/remoteproc/mtk_scp.c
+++ b/drivers/remoteproc/mtk_scp.c
@@ -23,6 +23,14 @@
#define MAX_CODE_SIZE 0x500000
#define SECTION_NAME_IPI_BUFFER ".ipi_buffer"
+struct mtk_scp_of_cluster {
+ void __iomem *reg_base;
+ void __iomem *l1tcm_base;
+ size_t l1tcm_size;
+ phys_addr_t l1tcm_phys;
+ struct list_head mtk_scp_list;
+};
+
/**
* scp_get() - get a reference to SCP.
*
@@ -51,7 +59,7 @@ struct mtk_scp *scp_get(struct platform_device *pdev)
return NULL;
}
- return platform_get_drvdata(scp_pdev);
+ return *(struct mtk_scp **)dev_get_platdata(&scp_pdev->dev);
}
EXPORT_SYMBOL_GPL(scp_get);
@@ -809,14 +817,14 @@ static void scp_unmap_memory_region(struct mtk_scp *scp)
static int scp_register_ipi(struct platform_device *pdev, u32 id,
ipi_handler_t handler, void *priv)
{
- struct mtk_scp *scp = platform_get_drvdata(pdev);
+ struct mtk_scp *scp = *(struct mtk_scp **)dev_get_platdata(&pdev->dev);
return scp_ipi_register(scp, id, handler, priv);
}
static void scp_unregister_ipi(struct platform_device *pdev, u32 id)
{
- struct mtk_scp *scp = platform_get_drvdata(pdev);
+ struct mtk_scp *scp = *(struct mtk_scp **)dev_get_platdata(&pdev->dev);
scp_ipi_unregister(scp, id);
}
@@ -824,7 +832,7 @@ static void scp_unregister_ipi(struct platform_device *pdev, u32 id)
static int scp_send_ipi(struct platform_device *pdev, u32 id, void *buf,
unsigned int len, unsigned int wait)
{
- struct mtk_scp *scp = platform_get_drvdata(pdev);
+ struct mtk_scp *scp = *(struct mtk_scp **)dev_get_platdata(&pdev->dev);
return scp_ipi_send(scp, id, buf, len, wait);
}
@@ -854,7 +862,8 @@ static void scp_remove_rpmsg_subdev(struct mtk_scp *scp)
}
}
-static int scp_probe(struct platform_device *pdev)
+static struct mtk_scp *scp_rproc_init(struct platform_device *pdev,
+ struct mtk_scp_of_cluster *scp_cluster)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
@@ -866,52 +875,42 @@ static int scp_probe(struct platform_device *pdev)
ret = rproc_of_parse_firmware(dev, 0, &fw_name);
if (ret < 0 && ret != -EINVAL)
- return ret;
+ return ERR_PTR(ret);
rproc = devm_rproc_alloc(dev, np->name, &scp_ops, fw_name, sizeof(*scp));
- if (!rproc)
- return dev_err_probe(dev, -ENOMEM, "unable to allocate remoteproc\n");
+ if (!rproc) {
+ dev_err(dev, "unable to allocate remoteproc\n");
+ return ERR_PTR(-ENOMEM);
+ }
scp = rproc->priv;
scp->rproc = rproc;
scp->dev = dev;
scp->data = of_device_get_match_data(dev);
- platform_set_drvdata(pdev, scp);
+ platform_device_add_data(pdev, &scp, sizeof(scp));
+
+ scp->reg_base = scp_cluster->reg_base;
+ scp->l1tcm_base = scp_cluster->l1tcm_base;
+ scp->l1tcm_size = scp_cluster->l1tcm_size;
+ scp->l1tcm_phys = scp_cluster->l1tcm_phys;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sram");
scp->sram_base = devm_ioremap_resource(dev, res);
- if (IS_ERR(scp->sram_base))
- return dev_err_probe(dev, PTR_ERR(scp->sram_base),
- "Failed to parse and map sram memory\n");
+ if (IS_ERR(scp->sram_base)) {
+ dev_err(dev, "Failed to parse and map sram memory\n");
+ return ERR_CAST(scp->sram_base);
+ }
scp->sram_size = resource_size(res);
scp->sram_phys = res->start;
- /* l1tcm is an optional memory region */
- res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "l1tcm");
- scp->l1tcm_base = devm_ioremap_resource(dev, res);
- if (IS_ERR(scp->l1tcm_base)) {
- ret = PTR_ERR(scp->l1tcm_base);
- if (ret != -EINVAL) {
- return dev_err_probe(dev, ret, "Failed to map l1tcm memory\n");
- }
- } else {
- scp->l1tcm_size = resource_size(res);
- scp->l1tcm_phys = res->start;
- }
-
- scp->reg_base = devm_platform_ioremap_resource_byname(pdev, "cfg");
- if (IS_ERR(scp->reg_base))
- return dev_err_probe(dev, PTR_ERR(scp->reg_base),
- "Failed to parse and map cfg memory\n");
-
ret = scp->data->scp_clk_get(scp);
if (ret)
- return ret;
+ return ERR_PTR(ret);
ret = scp_map_memory_region(scp);
if (ret)
- return ret;
+ return ERR_PTR(ret);
mutex_init(&scp->send_lock);
for (i = 0; i < SCP_IPI_MAX; i++)
@@ -938,11 +937,7 @@ static int scp_probe(struct platform_device *pdev)
goto remove_subdev;
}
- ret = rproc_add(rproc);
- if (ret)
- goto remove_subdev;
-
- return 0;
+ return scp;
remove_subdev:
scp_remove_rpmsg_subdev(scp);
@@ -953,15 +948,13 @@ static int scp_probe(struct platform_device *pdev)
mutex_destroy(&scp->ipi_desc[i].lock);
mutex_destroy(&scp->send_lock);
- return ret;
+ return ERR_PTR(ret);
}
-static void scp_remove(struct platform_device *pdev)
+static void scp_free(struct mtk_scp *scp)
{
- struct mtk_scp *scp = platform_get_drvdata(pdev);
int i;
- rproc_del(scp->rproc);
scp_remove_rpmsg_subdev(scp);
scp_ipi_unregister(scp, SCP_IPI_INIT);
scp_unmap_memory_region(scp);
@@ -970,6 +963,82 @@ static void scp_remove(struct platform_device *pdev)
mutex_destroy(&scp->send_lock);
}
+static int scp_cluster_init(struct platform_device *pdev)
+{
+ struct mtk_scp_of_cluster *scp_cluster = platform_get_drvdata(pdev);
+ struct list_head *cluster = &scp_cluster->mtk_scp_list;
+ struct mtk_scp *scp;
+ int ret;
+
+ scp = scp_rproc_init(pdev, scp_cluster);
+ if (IS_ERR(scp))
+ return PTR_ERR(scp);
+
+ ret = rproc_add(scp->rproc);
+ if (ret) {
+ dev_err(dev, "Failed to add rproc\n");
+ scp_free(scp);
+ return ret;
+ }
+
+ list_add_tail(&scp->elem, cluster);
+
+ return 0;
+}
+
+static int scp_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct mtk_scp_of_cluster *scp_cluster;
+ struct resource *res;
+ int ret;
+
+ scp_cluster = devm_kzalloc(dev, sizeof(*scp_cluster), GFP_KERNEL);
+ if (!scp_cluster)
+ return -ENOMEM;
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cfg");
+ scp_cluster->reg_base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(scp_cluster->reg_base))
+ return dev_err_probe(dev, PTR_ERR(scp_cluster->reg_base),
+ "Failed to parse and map cfg memory\n");
+
+ /* l1tcm is an optional memory region */
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "l1tcm");
+ scp_cluster->l1tcm_base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(scp_cluster->l1tcm_base)) {
+ ret = PTR_ERR(scp_cluster->l1tcm_base);
+ if (ret != -EINVAL)
+ return dev_err_probe(dev, ret, "Failed to map l1tcm memory\n");
+
+ scp_cluster->l1tcm_base = NULL;
+ } else {
+ scp_cluster->l1tcm_size = resource_size(res);
+ scp_cluster->l1tcm_phys = res->start;
+ }
+
+ INIT_LIST_HEAD(&scp_cluster->mtk_scp_list);
+ platform_set_drvdata(pdev, scp_cluster);
+
+ ret = scp_cluster_init(pdev);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static void scp_remove(struct platform_device *pdev)
+{
+ struct mtk_scp_of_cluster *scp_cluster = platform_get_drvdata(pdev);
+ struct mtk_scp *scp, *temp;
+
+ list_for_each_entry_safe_reverse(scp, temp, &scp_cluster->mtk_scp_list, elem) {
+ list_del(&scp->elem);
+ rproc_del(scp->rproc);
+ scp_free(scp);
+ }
+}
+
static const struct mtk_scp_of_data mt8183_of_data = {
.scp_clk_get = mt8183_scp_clk_get,
.scp_before_load = mt8183_scp_before_load,
--
2.18.0
From an overall perspective this patchset looks good. Now that we can clearly
see what is going on there are a few things to improve on. Please see below.
On Fri, Jul 07, 2023 at 01:26:05PM +0800, Tinghan Shen wrote:
> This is the preliminary step for probing multi-core SCP.
> The initialization procedure for remoteproc is similar for both
> single-core and multi-core architectures and is reusing to avoid
> redundant code.
>
> Rewrite the probing flow of single-core SCP to adapt with the 'cluster'
> concept needed by probing the multi-core SCP. The main differences
> are,
> - the SCP core object(s) is maintained at the cluster list instead of at
> the platform device driver data property.
> - save the cluster information at the platform device driver data property.
> - In order to keep the compatibility of exported SCP APIs which getting
> the SCP core object by SCP node phandle, move the SCP core object
> pointers to the platform device platform data property.
>
> The registers of config and l1tcm are shared for multi-core
> SCP. Reuse the mapped addresses for all cores.
>
> Signed-off-by: Tinghan Shen <[email protected]>
> ---
> drivers/remoteproc/mtk_common.h | 2 +
> drivers/remoteproc/mtk_scp.c | 151 +++++++++++++++++++++++---------
> 2 files changed, 112 insertions(+), 41 deletions(-)
>
> diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h
> index c0905aec3b4b..56395e8664cb 100644
> --- a/drivers/remoteproc/mtk_common.h
> +++ b/drivers/remoteproc/mtk_common.h
> @@ -128,6 +128,8 @@ struct mtk_scp {
> size_t dram_size;
>
> struct rproc_subdev *rpmsg_subdev;
> +
> + struct list_head elem;
> };
>
> /**
> diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
> index 48e759c2d486..3a8c8bcfa46b 100644
> --- a/drivers/remoteproc/mtk_scp.c
> +++ b/drivers/remoteproc/mtk_scp.c
> @@ -23,6 +23,14 @@
> #define MAX_CODE_SIZE 0x500000
> #define SECTION_NAME_IPI_BUFFER ".ipi_buffer"
>
> +struct mtk_scp_of_cluster {
> + void __iomem *reg_base;
> + void __iomem *l1tcm_base;
> + size_t l1tcm_size;
> + phys_addr_t l1tcm_phys;
> + struct list_head mtk_scp_list;
> +};
> +
> /**
> * scp_get() - get a reference to SCP.
> *
> @@ -51,7 +59,7 @@ struct mtk_scp *scp_get(struct platform_device *pdev)
> return NULL;
> }
>
> - return platform_get_drvdata(scp_pdev);
> + return *(struct mtk_scp **)dev_get_platdata(&scp_pdev->dev);
> }
> EXPORT_SYMBOL_GPL(scp_get);
>
> @@ -809,14 +817,14 @@ static void scp_unmap_memory_region(struct mtk_scp *scp)
> static int scp_register_ipi(struct platform_device *pdev, u32 id,
> ipi_handler_t handler, void *priv)
> {
> - struct mtk_scp *scp = platform_get_drvdata(pdev);
> + struct mtk_scp *scp = *(struct mtk_scp **)dev_get_platdata(&pdev->dev);
>
> return scp_ipi_register(scp, id, handler, priv);
> }
>
> static void scp_unregister_ipi(struct platform_device *pdev, u32 id)
> {
> - struct mtk_scp *scp = platform_get_drvdata(pdev);
> + struct mtk_scp *scp = *(struct mtk_scp **)dev_get_platdata(&pdev->dev);
>
> scp_ipi_unregister(scp, id);
> }
> @@ -824,7 +832,7 @@ static void scp_unregister_ipi(struct platform_device *pdev, u32 id)
> static int scp_send_ipi(struct platform_device *pdev, u32 id, void *buf,
> unsigned int len, unsigned int wait)
> {
> - struct mtk_scp *scp = platform_get_drvdata(pdev);
> + struct mtk_scp *scp = *(struct mtk_scp **)dev_get_platdata(&pdev->dev);
>
> return scp_ipi_send(scp, id, buf, len, wait);
> }
> @@ -854,7 +862,8 @@ static void scp_remove_rpmsg_subdev(struct mtk_scp *scp)
> }
> }
>
> -static int scp_probe(struct platform_device *pdev)
> +static struct mtk_scp *scp_rproc_init(struct platform_device *pdev,
> + struct mtk_scp_of_cluster *scp_cluster)
> {
> struct device *dev = &pdev->dev;
> struct device_node *np = dev->of_node;
> @@ -866,52 +875,42 @@ static int scp_probe(struct platform_device *pdev)
>
> ret = rproc_of_parse_firmware(dev, 0, &fw_name);
> if (ret < 0 && ret != -EINVAL)
> - return ret;
> + return ERR_PTR(ret);
>
> rproc = devm_rproc_alloc(dev, np->name, &scp_ops, fw_name, sizeof(*scp));
> - if (!rproc)
> - return dev_err_probe(dev, -ENOMEM, "unable to allocate remoteproc\n");
> + if (!rproc) {
> + dev_err(dev, "unable to allocate remoteproc\n");
> + return ERR_PTR(-ENOMEM);
> + }
>
> scp = rproc->priv;
> scp->rproc = rproc;
> scp->dev = dev;
> scp->data = of_device_get_match_data(dev);
> - platform_set_drvdata(pdev, scp);
> + platform_device_add_data(pdev, &scp, sizeof(scp));
Using platform_device_add_data() doesn't work because it creates a duplicate
copy of @scp. To fix this I suggest to:
1. Change mtk_scp_of_cluster::l2tcm_lock to mtk_scp_of_cluster::cluster_lock
2. Add a struct mtk_scp_of_cluster *cluster to struct mtk_scp
3. Don't call platform_set_drvdata(pdev, scp_cluster) in scp_probe()
4. Above do scp->cluster = scp_cluster and call platform_set_drvdata(pdev, scp)
instead of platform_device_add_data().
5. Every time you are modifying scp->cluster, scp->cluster->cluster_lock must be
held.
> +
> + scp->reg_base = scp_cluster->reg_base;
> + scp->l1tcm_base = scp_cluster->l1tcm_base;
> + scp->l1tcm_size = scp_cluster->l1tcm_size;
> + scp->l1tcm_phys = scp_cluster->l1tcm_phys;
Fields reg_base, l1tcm_base, l1tcm_size and l1tcm_phy don't belong in the
mtk_scp struct anymore but in the mtk_scp_of_cluster struct. With the above
changes they should be available in the same way.
Thanks,
Mathieu
>
> res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sram");
> scp->sram_base = devm_ioremap_resource(dev, res);
> - if (IS_ERR(scp->sram_base))
> - return dev_err_probe(dev, PTR_ERR(scp->sram_base),
> - "Failed to parse and map sram memory\n");
> + if (IS_ERR(scp->sram_base)) {
> + dev_err(dev, "Failed to parse and map sram memory\n");
> + return ERR_CAST(scp->sram_base);
> + }
>
> scp->sram_size = resource_size(res);
> scp->sram_phys = res->start;
>
> - /* l1tcm is an optional memory region */
> - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "l1tcm");
> - scp->l1tcm_base = devm_ioremap_resource(dev, res);
> - if (IS_ERR(scp->l1tcm_base)) {
> - ret = PTR_ERR(scp->l1tcm_base);
> - if (ret != -EINVAL) {
> - return dev_err_probe(dev, ret, "Failed to map l1tcm memory\n");
> - }
> - } else {
> - scp->l1tcm_size = resource_size(res);
> - scp->l1tcm_phys = res->start;
> - }
> -
> - scp->reg_base = devm_platform_ioremap_resource_byname(pdev, "cfg");
> - if (IS_ERR(scp->reg_base))
> - return dev_err_probe(dev, PTR_ERR(scp->reg_base),
> - "Failed to parse and map cfg memory\n");
> -
> ret = scp->data->scp_clk_get(scp);
> if (ret)
> - return ret;
> + return ERR_PTR(ret);
>
> ret = scp_map_memory_region(scp);
> if (ret)
> - return ret;
> + return ERR_PTR(ret);
>
> mutex_init(&scp->send_lock);
> for (i = 0; i < SCP_IPI_MAX; i++)
> @@ -938,11 +937,7 @@ static int scp_probe(struct platform_device *pdev)
> goto remove_subdev;
> }
>
> - ret = rproc_add(rproc);
> - if (ret)
> - goto remove_subdev;
> -
> - return 0;
> + return scp;
>
> remove_subdev:
> scp_remove_rpmsg_subdev(scp);
> @@ -953,15 +948,13 @@ static int scp_probe(struct platform_device *pdev)
> mutex_destroy(&scp->ipi_desc[i].lock);
> mutex_destroy(&scp->send_lock);
>
> - return ret;
> + return ERR_PTR(ret);
> }
>
> -static void scp_remove(struct platform_device *pdev)
> +static void scp_free(struct mtk_scp *scp)
> {
> - struct mtk_scp *scp = platform_get_drvdata(pdev);
> int i;
>
> - rproc_del(scp->rproc);
> scp_remove_rpmsg_subdev(scp);
> scp_ipi_unregister(scp, SCP_IPI_INIT);
> scp_unmap_memory_region(scp);
> @@ -970,6 +963,82 @@ static void scp_remove(struct platform_device *pdev)
> mutex_destroy(&scp->send_lock);
> }
>
> +static int scp_cluster_init(struct platform_device *pdev)
> +{
> + struct mtk_scp_of_cluster *scp_cluster = platform_get_drvdata(pdev);
> + struct list_head *cluster = &scp_cluster->mtk_scp_list;
> + struct mtk_scp *scp;
> + int ret;
> +
> + scp = scp_rproc_init(pdev, scp_cluster);
> + if (IS_ERR(scp))
> + return PTR_ERR(scp);
> +
> + ret = rproc_add(scp->rproc);
> + if (ret) {
> + dev_err(dev, "Failed to add rproc\n");
> + scp_free(scp);
> + return ret;
> + }
> +
> + list_add_tail(&scp->elem, cluster);
> +
> + return 0;
> +}
> +
> +static int scp_probe(struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
> + struct mtk_scp_of_cluster *scp_cluster;
> + struct resource *res;
> + int ret;
> +
> + scp_cluster = devm_kzalloc(dev, sizeof(*scp_cluster), GFP_KERNEL);
> + if (!scp_cluster)
> + return -ENOMEM;
> +
> + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cfg");
> + scp_cluster->reg_base = devm_ioremap_resource(dev, res);
> + if (IS_ERR(scp_cluster->reg_base))
> + return dev_err_probe(dev, PTR_ERR(scp_cluster->reg_base),
> + "Failed to parse and map cfg memory\n");
> +
> + /* l1tcm is an optional memory region */
> + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "l1tcm");
> + scp_cluster->l1tcm_base = devm_ioremap_resource(dev, res);
> + if (IS_ERR(scp_cluster->l1tcm_base)) {
> + ret = PTR_ERR(scp_cluster->l1tcm_base);
> + if (ret != -EINVAL)
> + return dev_err_probe(dev, ret, "Failed to map l1tcm memory\n");
> +
> + scp_cluster->l1tcm_base = NULL;
> + } else {
> + scp_cluster->l1tcm_size = resource_size(res);
> + scp_cluster->l1tcm_phys = res->start;
> + }
> +
> + INIT_LIST_HEAD(&scp_cluster->mtk_scp_list);
> + platform_set_drvdata(pdev, scp_cluster);
> +
> + ret = scp_cluster_init(pdev);
> + if (ret)
> + return ret;
> +
> + return 0;
> +}
> +
> +static void scp_remove(struct platform_device *pdev)
> +{
> + struct mtk_scp_of_cluster *scp_cluster = platform_get_drvdata(pdev);
> + struct mtk_scp *scp, *temp;
> +
> + list_for_each_entry_safe_reverse(scp, temp, &scp_cluster->mtk_scp_list, elem) {
> + list_del(&scp->elem);
> + rproc_del(scp->rproc);
> + scp_free(scp);
> + }
> +}
> +
> static const struct mtk_scp_of_data mt8183_of_data = {
> .scp_clk_get = mt8183_scp_clk_get,
> .scp_before_load = mt8183_scp_before_load,
> --
> 2.18.0
>