diff mbox series

[4/5] soc: mediatek: mtk-cmdq: Add cmdq_pkt_acquire_event() function

Message ID 20240301111126.22035-5-jason-jh.lin@mediatek.com
State New
Headers
Series Add CMDQ API for upcoming ISP feature |

Commit Message

Jason-JH Lin (林睿祥) March 1, 2024, 11:11 a.m. UTC 
  Add cmdq_pkt_acquire_event() function to support CMDQ user making
an instruction for acquiring event.

CMDQ users can use cmdq_pkt_acquire_event() and cmdq_pkt_clear_event()
to acquire GCE event and release GCE event and achieve the MUTEX_LOCK
protection between GCE threads.

Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>
Change-Id: Icdae6b60345c7ec1d7541ac76d1f06da56959cde
---
 drivers/soc/mediatek/mtk-cmdq-helper.c | 15 +++++++++++++++
 include/linux/soc/mediatek/mtk-cmdq.h  |  9 +++++++++
 2 files changed, 24 insertions(+)

Comments

AngeloGioacchino Del Regno March 4, 2024, 10:05 a.m. UTC | #1 
Il 01/03/24 12:11, Jason-JH.Lin ha scritto:
> Add cmdq_pkt_acquire_event() function to support CMDQ user making
> an instruction for acquiring event.
> 
> CMDQ users can use cmdq_pkt_acquire_event() and cmdq_pkt_clear_event()
> to acquire GCE event and release GCE event and achieve the MUTEX_LOCK
> protection between GCE threads.
> 
> Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>
> Change-Id: Icdae6b60345c7ec1d7541ac76d1f06da56959cde

Drop Change-Id please.

> ---
>   drivers/soc/mediatek/mtk-cmdq-helper.c | 15 +++++++++++++++
>   include/linux/soc/mediatek/mtk-cmdq.h  |  9 +++++++++
>   2 files changed, 24 insertions(+)
> 
> diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
> index 2e9fc9bb1183..0183b40a0eff 100644
> --- a/drivers/soc/mediatek/mtk-cmdq-helper.c
> +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
> @@ -342,6 +342,21 @@ int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event, bool clear)
>   }
>   EXPORT_SYMBOL(cmdq_pkt_wfe);
>   
> +int cmdq_pkt_acquire_event(struct cmdq_pkt *pkt, u16 event)
> +{
> +	struct cmdq_instruction inst = {};
> +
> +	if (event >= CMDQ_MAX_EVENT)
> +		return -EINVAL;
> +
> +	inst.op = CMDQ_CODE_WFE;
> +	inst.value = CMDQ_WFE_UPDATE | CMDQ_WFE_UPDATE_VALUE | CMDQ_WFE_WAIT;
> +	inst.event = event;
> +
> +	return cmdq_pkt_append_command(pkt, inst);
> +}
> +EXPORT_SYMBOL(cmdq_pkt_acquire_event);
> +
>   int cmdq_pkt_clear_event(struct cmdq_pkt *pkt, u16 event)
>   {
>   	struct cmdq_instruction inst = { {0} };
> diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
> index 2fe9be240fbc..de93c0a8e8a9 100644
> --- a/include/linux/soc/mediatek/mtk-cmdq.h
> +++ b/include/linux/soc/mediatek/mtk-cmdq.h
> @@ -202,6 +202,15 @@ int cmdq_pkt_mem_move(struct cmdq_pkt *pkt, dma_addr_t src_addr, dma_addr_t dst_
>    */
>   int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event, bool clear);
>   
> +/**
> + * cmdq_pkt_acquire_event() - append acquire event command to the CMDQ packet
> + * @pkt:	the CMDQ packet
> + * @event:	the desired event to be acquired

What you wrote in the commit message is good documentation for this function,
please also put it here in kerneldoc format as a documentation paragraph.

> + *
> + * Return: 0 for success; else the error code is returned
> + */
> +int cmdq_pkt_acquire_event(struct cmdq_pkt *pkt, u16 event);
> +
>   /**
>    * cmdq_pkt_clear_event() - append clear event command to the CMDQ packet
>    * @pkt:	the CMDQ packet
diff mbox series

Patch

diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
index 2e9fc9bb1183..0183b40a0eff 100644
--- a/drivers/soc/mediatek/mtk-cmdq-helper.c
+++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
@@ -342,6 +342,21 @@  int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event, bool clear)
 }
 EXPORT_SYMBOL(cmdq_pkt_wfe);
 
+int cmdq_pkt_acquire_event(struct cmdq_pkt *pkt, u16 event)
+{
+	struct cmdq_instruction inst = {};
+
+	if (event >= CMDQ_MAX_EVENT)
+		return -EINVAL;
+
+	inst.op = CMDQ_CODE_WFE;
+	inst.value = CMDQ_WFE_UPDATE | CMDQ_WFE_UPDATE_VALUE | CMDQ_WFE_WAIT;
+	inst.event = event;
+
+	return cmdq_pkt_append_command(pkt, inst);
+}
+EXPORT_SYMBOL(cmdq_pkt_acquire_event);
+
 int cmdq_pkt_clear_event(struct cmdq_pkt *pkt, u16 event)
 {
 	struct cmdq_instruction inst = { {0} };
diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
index 2fe9be240fbc..de93c0a8e8a9 100644
--- a/include/linux/soc/mediatek/mtk-cmdq.h
+++ b/include/linux/soc/mediatek/mtk-cmdq.h
@@ -202,6 +202,15 @@  int cmdq_pkt_mem_move(struct cmdq_pkt *pkt, dma_addr_t src_addr, dma_addr_t dst_
  */
 int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event, bool clear);
 
+/**
+ * cmdq_pkt_acquire_event() - append acquire event command to the CMDQ packet
+ * @pkt:	the CMDQ packet
+ * @event:	the desired event to be acquired
+ *
+ * Return: 0 for success; else the error code is returned
+ */
+int cmdq_pkt_acquire_event(struct cmdq_pkt *pkt, u16 event);
+
 /**
  * cmdq_pkt_clear_event() - append clear event command to the CMDQ packet
  * @pkt:	the CMDQ packet