Due to that SCP core 0 controls the SCP clock and SRAM power, add two
new mtk_scp_of_data operations, scp_boot_peers and scp_shutdown_peers,
to manage the boot sequence and watchdog timeout handling of SCP core 1.
It ensures that core 1 boots after or shuts down before core 0 for
maintaining the proper control flow over SCP core 1.
Signed-off-by: Tinghan Shen <tinghan.shen@xxxxxxxxxxxx>
---
drivers/remoteproc/mtk_common.h | 3 ++
drivers/remoteproc/mtk_scp.c | 55 +++++++++++++++++++++++++++++++++
2 files changed, 58 insertions(+)
diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h
index 56395e8664cb..0bfd242c41cc 100644
--- a/drivers/remoteproc/mtk_common.h
+++ b/drivers/remoteproc/mtk_common.h
@@ -93,6 +93,8 @@ struct mtk_scp_of_data {
void (*scp_reset_deassert)(struct mtk_scp *scp);
void (*scp_stop)(struct mtk_scp *scp);
void *(*scp_da_to_va)(struct mtk_scp *scp, u64 da, size_t len);
+ void (*scp_boot_peers)(struct mtk_scp *scp);
+ void (*scp_shutdown_peers)(struct mtk_scp *scp);
u32 host_to_scp_reg;
u32 host_to_scp_int_bit;
@@ -130,6 +132,7 @@ struct mtk_scp {
struct rproc_subdev *rpmsg_subdev;
struct list_head elem;
+ struct list_head *cluster;
};
/**
diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
index d644e232dfec..edbf71f4c21e 100644
--- a/drivers/remoteproc/mtk_scp.c
+++ b/drivers/remoteproc/mtk_scp.c
@@ -74,8 +74,21 @@ void scp_put(struct mtk_scp *scp)
}
EXPORT_SYMBOL_GPL(scp_put);
+static void mt8195_scp_shutdown_peers(struct mtk_scp *scp)
+{
+ struct mtk_scp *next_scp;
+
+ next_scp = list_next_entry(scp, elem);
+ list_for_each_entry_from(next_scp, scp->cluster, elem) {
+ rproc_shutdown(next_scp->rproc);
+ }
+}
+
static void scp_wdt_handler(struct mtk_scp *scp, u32 scp_to_host)
{
+ if (scp->data->scp_shutdown_peers)
+ scp->data->scp_shutdown_peers(scp);
+
dev_err(scp->dev, "SCP watchdog timeout! 0x%x", scp_to_host);
rproc_report_crash(scp->rproc, RPROC_WATCHDOG);
}
@@ -539,6 +552,18 @@ static int scp_parse_fw(struct rproc *rproc, const struct firmware *fw)
return ret;
}
+static void mt8195_scp_boot_peers(struct mtk_scp *scp)
+{
+ struct mtk_scp *next_scp;
+
+ if (scp->cluster && !list_empty(scp->cluster)) {
+ next_scp = list_next_entry(scp, elem);
+ list_for_each_entry_from(next_scp, scp->cluster, elem) {
+ rproc_boot(next_scp->rproc);
+ }
+ }
+}
+
static int scp_start(struct rproc *rproc)
{
struct mtk_scp *scp = rproc->priv;
@@ -574,6 +599,9 @@ static int scp_start(struct rproc *rproc)
clk_disable_unprepare(scp->clk);
dev_info(dev, "SCP is ready. FW version %s\n", run->fw_ver);
+ if (scp->data->scp_boot_peers)
+ scp->data->scp_boot_peers(scp);
+
return 0;
stop:
@@ -977,6 +1005,8 @@ static int scp_add_single_core(struct platform_device *pdev)
if (IS_ERR(scp))
return PTR_ERR(scp);
+ scp->cluster = cluster;
+
ret = rproc_add(scp->rproc);
if (ret) {
dev_err(dev, "Failed to add rproc\n");
@@ -989,6 +1019,15 @@ static int scp_add_single_core(struct platform_device *pdev)
return 0;
}
+static void scp_rproc_boot_core0(const struct firmware *fw, void *context)
+{
+ struct rproc *rproc = context;
+
+ rproc_boot(rproc);
+
+ release_firmware(fw);
+}
+
static int scp_add_multi_core(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -1029,6 +1068,10 @@ static int scp_add_multi_core(struct platform_device *pdev)
goto init_fail;
}
+ /* boot after all cores are discovered */
+ scp->rproc->auto_boot = false;
+ scp->cluster = cluster;
+
ret = rproc_add(scp->rproc);
if (ret) {
dev_err(dev, "Failed to add rproc of core %d\n", core_id);
@@ -1041,6 +1084,16 @@ static int scp_add_multi_core(struct platform_device *pdev)
core_id++;
}
+ /* boot core 0, and other cores are booted following core 0 */
+ scp = list_first_entry(cluster, struct mtk_scp, elem);
+ ret = request_firmware_nowait(THIS_MODULE, FW_ACTION_UEVENT,
+ scp->rproc->firmware, &scp->rproc->dev, GFP_KERNEL,
+ scp->rproc, scp_rproc_boot_core0);
+ if (ret < 0) {
+ dev_err(dev, "request_firmware_nowait err: %d\n", ret);
+ goto init_fail;
+ }
+
return 0;
init_fail:
@@ -1198,6 +1251,8 @@ static const struct mtk_scp_of_data mt8195_of_data = {
.scp_reset_deassert = mt8192_scp_reset_deassert,
.scp_stop = mt8195_scp_stop,
.scp_da_to_va = mt8192_scp_da_to_va,
+ .scp_boot_peers = mt8195_scp_boot_peers,
+ .scp_shutdown_peers = mt8195_scp_shutdown_peers,
.host_to_scp_reg = MT8192_GIPC_IN_SET,
.host_to_scp_int_bit = MT8192_HOST_IPC_INT_BIT,
};
--
2.18.0
