Messages in this thread Patch in this message | | | From | Hsiao Chien Sung <> | Subject | [PATCH 03/15] soc: mediatek: Support GCE thread loop | Date | Wed, 23 Aug 2023 23:13:20 +0800 |
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Add a new API to create GCE thread loop by appending a command at the end of CMDQ packet to jump to the head of it.
Signed-off-by: Hsiao Chien Sung <shawn.sung@mediatek.com> --- drivers/soc/mediatek/mtk-cmdq-helper.c | 30 ++++++++++++++++++++++++++ include/linux/soc/mediatek/mtk-cmdq.h | 2 ++ 2 files changed, 32 insertions(+)
diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c index c1837a468267..7d503d491c0d 100644 --- a/drivers/soc/mediatek/mtk-cmdq-helper.c +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c @@ -430,6 +430,9 @@ int cmdq_pkt_flush_async(struct cmdq_pkt *pkt) int err; struct cmdq_client *client = (struct cmdq_client *)pkt->cl; + dma_sync_single_for_device(client->chan->mbox->dev, pkt->pa_base, + pkt->cmd_buf_size, DMA_TO_DEVICE); + err = mbox_send_message(client->chan, pkt); if (err < 0) return err; @@ -440,4 +443,31 @@ int cmdq_pkt_flush_async(struct cmdq_pkt *pkt) } EXPORT_SYMBOL(cmdq_pkt_flush_async); +int cmdq_pkt_finalize_loop(struct cmdq_pkt *pkt) +{ + struct cmdq_instruction inst = { {0} }; + int err; + u8 shift_pa = 0; + + shift_pa = cmdq_get_shift_pa(((struct cmdq_client *)pkt->cl)->chan); + + /* insert EOC and generate IRQ for command iteration */ + inst.op = CMDQ_CODE_EOC; + inst.value = CMDQ_EOC_IRQ_EN; + err = cmdq_pkt_append_command(pkt, inst); + if (err < 0) + return err; + + /* jump to head of the packet */ + inst.op = CMDQ_CODE_JUMP; + inst.offset = CMDQ_JUMP_RELATIVE; + inst.value = pkt->pa_base >> shift_pa; + err = cmdq_pkt_append_command(pkt, inst); + + pkt->loop = true; + + return err; +} +EXPORT_SYMBOL(cmdq_pkt_finalize_loop); + MODULE_LICENSE("GPL v2"); diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h index 3eb95ef34c6c..4c30f891d924 100644 --- a/include/linux/soc/mediatek/mtk-cmdq.h +++ b/include/linux/soc/mediatek/mtk-cmdq.h @@ -273,6 +273,8 @@ int cmdq_pkt_jump(struct cmdq_pkt *pkt, dma_addr_t addr); */ int cmdq_pkt_finalize(struct cmdq_pkt *pkt); +int cmdq_pkt_finalize_loop(struct cmdq_pkt *pkt); + /** * cmdq_pkt_flush_async() - trigger CMDQ to asynchronously execute the CMDQ * packet and call back at the end of done packet -- 2.18.0
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