diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c index 1a1f1b260a06..4cd1a25866a9 100644 --- a/drivers/soc/mediatek/mtk-cmdq-helper.c +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c @@ -290,6 +290,32 @@ int cmdq_pkt_write_s_mask_value(struct cmdq_pkt *pkt, u8 high_addr_reg_idx, } EXPORT_SYMBOL(cmdq_pkt_write_s_mask_value); +int cmdq_pkt_mem_move(struct cmdq_pkt *pkt, dma_addr_t src_addr, dma_addr_t dst_addr) +{ + const u16 high_addr_reg_idx = CMDQ_THR_SPR_IDX0; + const u16 value_reg_idx = CMDQ_THR_SPR_IDX1; + int ret; + + /* read the value of src_addr into high_addr_reg_idx */ + ret = cmdq_pkt_assign(pkt, high_addr_reg_idx, CMDQ_ADDR_HIGH(src_addr)); + if (ret < 0) + return ret; + ret = cmdq_pkt_read_s(pkt, high_addr_reg_idx, CMDQ_ADDR_LOW(src_addr), value_reg_idx); + if (ret < 0) + return ret; + + /* write the value of value_reg_idx into dst_addr */ + ret = cmdq_pkt_assign(pkt, high_addr_reg_idx, CMDQ_ADDR_HIGH(dst_addr)); + if (ret < 0) + return ret; + ret = cmdq_pkt_write_s(pkt, high_addr_reg_idx, CMDQ_ADDR_LOW(dst_addr), value_reg_idx); + if (ret < 0) + return ret; + + return 0; +} +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 042c61f29dc1..167c8fecac30 100644 --- a/include/linux/soc/mediatek/mtk-cmdq.h +++ b/include/linux/soc/mediatek/mtk-cmdq.h @@ -184,6 +184,18 @@ 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 + * @dst_addr: destination address + * + * Appends a CMDQ command to copy the value found in `src_addr` to `dst_addr`. + * + * 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