diff mbox series

[2/5] soc: mediatek: mtk-cmdq: Add cmdq_pkt_mem_move() function

Message ID 20240301111126.22035-3-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_mem_move() function to support CMDQ user making
an instruction for moving a value from a source address to a
destination address.

Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>
Change-Id: I0128db6a3412303fc6da61f8a57a0c08e0c0067e
---
 drivers/soc/mediatek/mtk-cmdq-helper.c | 26 ++++++++++++++++++++++++++
 include/linux/soc/mediatek/mtk-cmdq.h  | 10 ++++++++++
 2 files changed, 36 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_mem_move() function to support CMDQ user making
> an instruction for moving a value from a source address to a
> destination address.
> 
> Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>
> Change-Id: I0128db6a3412303fc6da61f8a57a0c08e0c0067e

Drop Change-id please

> ---
>   drivers/soc/mediatek/mtk-cmdq-helper.c | 26 ++++++++++++++++++++++++++
>   include/linux/soc/mediatek/mtk-cmdq.h  | 10 ++++++++++
>   2 files changed, 36 insertions(+)
> 
> diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
> index b0cd071c4719..3a1e47ad8a41 100644
> --- a/drivers/soc/mediatek/mtk-cmdq-helper.c
> +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
> @@ -299,6 +299,32 @@ int cmdq_pkt_write_s_mask_value(struct cmdq_pkt *pkt, u8 high_addr_reg_idx,
>   }
>   EXPORT_SYMBOL(cmdq_pkt_write_s_mask_value);
>   
> +s32 cmdq_pkt_mem_move(struct cmdq_pkt *pkt, dma_addr_t src_addr, dma_addr_t dst_addr)
> +{
> +	s32 err;
> +	const u16 tmp_reg_idx = CMDQ_THR_SPR_IDX0;
> +	const u16 swap_reg_idx = CMDQ_THR_SPR_IDX1;

s32 err at the end please

> +
> +	/* read the value of src_addr into swap_reg_idx */
> +	err = cmdq_pkt_assign(pkt, tmp_reg_idx, CMDQ_ADDR_HIGH(src_addr));
> +	if (err < 0)
> +		return err;
> +	err = cmdq_pkt_read_s(pkt, tmp_reg_idx, CMDQ_ADDR_LOW(src_addr), swap_reg_idx);
> +	if (err < 0)
> +		return err;
> +
> +	/* write the value of swap_reg_idx into dst_addr */
> +	err = cmdq_pkt_assign(pkt, tmp_reg_idx, CMDQ_ADDR_HIGH(dst_addr));
> +	if (err < 0)
> +		return err;
> +	err = cmdq_pkt_write_s(pkt, tmp_reg_idx, CMDQ_ADDR_LOW(dst_addr), swap_reg_idx);
> +	if (err < 0)
> +		return err;
> +
> +	return err;

In the documentation, you say "0 for success", so...

return 0; here :-)

> +}
> +EXPORT_SYMBOL(cmdq_pkt_mem_move);
> +
>   int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event, bool clear)
>   {
>   	struct cmdq_instruction inst = { {0} };
> diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
> index 1dae80185f9f..b6dbe2d8f16a 100644
> --- a/include/linux/soc/mediatek/mtk-cmdq.h
> +++ b/include/linux/soc/mediatek/mtk-cmdq.h
> @@ -182,6 +182,16 @@ int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u8 high_addr_reg_idx,
>   int cmdq_pkt_write_s_mask_value(struct cmdq_pkt *pkt, u8 high_addr_reg_idx,
>   				u16 addr_low, u32 value, u32 mask);
>   
> +/**
> + * cmdq_pkt_mem_move() - append memory move command to the CMDQ packet
> + * @pkt:	the CMDQ packet
> + * @src_addr:	source address
> + * @dma_addr_t: destination address
> + *

  * @dst_addr: destination address
  *
  * Appends a CMDQ command to copy the value found in `src_addr` to `dst_addr`
  *
  * Return ....

> + * Return: 0 for success; else the error code is returned
> + */
> +int cmdq_pkt_mem_move(struct cmdq_pkt *pkt, dma_addr_t src_addr, dma_addr_t dst_addr);
> +
>   /**
>    * cmdq_pkt_wfe() - append wait for 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 b0cd071c4719..3a1e47ad8a41 100644
--- a/drivers/soc/mediatek/mtk-cmdq-helper.c
+++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
@@ -299,6 +299,32 @@  int cmdq_pkt_write_s_mask_value(struct cmdq_pkt *pkt, u8 high_addr_reg_idx,
 }
 EXPORT_SYMBOL(cmdq_pkt_write_s_mask_value);
 
+s32 cmdq_pkt_mem_move(struct cmdq_pkt *pkt, dma_addr_t src_addr, dma_addr_t dst_addr)
+{
+	s32 err;
+	const u16 tmp_reg_idx = CMDQ_THR_SPR_IDX0;
+	const u16 swap_reg_idx = CMDQ_THR_SPR_IDX1;
+
+	/* read the value of src_addr into swap_reg_idx */
+	err = cmdq_pkt_assign(pkt, tmp_reg_idx, CMDQ_ADDR_HIGH(src_addr));
+	if (err < 0)
+		return err;
+	err = cmdq_pkt_read_s(pkt, tmp_reg_idx, CMDQ_ADDR_LOW(src_addr), swap_reg_idx);
+	if (err < 0)
+		return err;
+
+	/* write the value of swap_reg_idx into dst_addr */
+	err = cmdq_pkt_assign(pkt, tmp_reg_idx, CMDQ_ADDR_HIGH(dst_addr));
+	if (err < 0)
+		return err;
+	err = cmdq_pkt_write_s(pkt, tmp_reg_idx, CMDQ_ADDR_LOW(dst_addr), swap_reg_idx);
+	if (err < 0)
+		return err;
+
+	return err;
+}
+EXPORT_SYMBOL(cmdq_pkt_mem_move);
+
 int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event, bool clear)
 {
 	struct cmdq_instruction inst = { {0} };
diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
index 1dae80185f9f..b6dbe2d8f16a 100644
--- a/include/linux/soc/mediatek/mtk-cmdq.h
+++ b/include/linux/soc/mediatek/mtk-cmdq.h
@@ -182,6 +182,16 @@  int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u8 high_addr_reg_idx,
 int cmdq_pkt_write_s_mask_value(struct cmdq_pkt *pkt, u8 high_addr_reg_idx,
 				u16 addr_low, u32 value, u32 mask);
 
+/**
+ * cmdq_pkt_mem_move() - append memory move command to the CMDQ packet
+ * @pkt:	the CMDQ packet
+ * @src_addr:	source address
+ * @dma_addr_t: destination address
+ *
+ * Return: 0 for success; else the error code is returned
+ */
+int cmdq_pkt_mem_move(struct cmdq_pkt *pkt, dma_addr_t src_addr, dma_addr_t dst_addr);
+
 /**
  * cmdq_pkt_wfe() - append wait for event command to the CMDQ packet
  * @pkt:	the CMDQ packet