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authorChun-Kuang Hu <chunkuang.hu@kernel.org>2024-02-22 18:41:12 +0300
committerAngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>2024-04-23 13:16:54 +0300
commit698cdcb19579f9de005698f9dfb660ab6ec65d32 (patch)
tree87b5272d2bfc41708df13ba2199d5b541e9940d4
parent7218be3b6fcf00d1a3a6867aa1be6b9ab91cce45 (diff)
downloadlinux-698cdcb19579f9de005698f9dfb660ab6ec65d32.tar.xz
soc: mediatek: cmdq: Add cmdq_pkt_jump_rel() helper function
cmdq_pkt_jump_rel() append relative jump command to the packet. Relative jump change PC to the target address with offset from current PC. Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Link: https://lore.kernel.org/r/20240222154120.16959-5-chunkuang.hu@kernel.org Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
-rw-r--r--drivers/soc/mediatek/mtk-cmdq-helper.c10
-rw-r--r--include/linux/soc/mediatek/mtk-cmdq.h19
2 files changed, 29 insertions, 0 deletions
diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
index 38d9077725d2..678db09983d4 100644
--- a/drivers/soc/mediatek/mtk-cmdq-helper.c
+++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
@@ -404,6 +404,16 @@ int cmdq_pkt_jump_abs(struct cmdq_pkt *pkt, dma_addr_t addr, u8 shift_pa)
}
EXPORT_SYMBOL(cmdq_pkt_jump_abs);
+int cmdq_pkt_jump_rel(struct cmdq_pkt *pkt, s32 offset, u8 shift_pa)
+{
+ struct cmdq_instruction inst = { {0} };
+
+ inst.op = CMDQ_CODE_JUMP;
+ inst.value = (u32)offset >> shift_pa;
+ return cmdq_pkt_append_command(pkt, inst);
+}
+EXPORT_SYMBOL(cmdq_pkt_jump_rel);
+
int cmdq_pkt_finalize(struct cmdq_pkt *pkt)
{
struct cmdq_instruction inst = { {0} };
diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
index 961f4c521067..cadb6a157607 100644
--- a/include/linux/soc/mediatek/mtk-cmdq.h
+++ b/include/linux/soc/mediatek/mtk-cmdq.h
@@ -268,6 +268,20 @@ static inline int cmdq_pkt_jump(struct cmdq_pkt *pkt, dma_addr_t addr, u8 shift_
}
/**
+ * cmdq_pkt_jump_rel() - Append jump command to the CMDQ packet, ask GCE
+ * to execute an instruction that change current thread
+ * PC to a physical address with relative offset. The
+ * target address should contains more instruction.
+ * @pkt: the CMDQ packet
+ * @offset: relative offset of target instruction buffer from current PC.
+ * @shift_pa: shift bits of physical address in CMDQ instruction. This value
+ * is got by cmdq_get_shift_pa().
+ *
+ * Return: 0 for success; else the error code is returned
+ */
+int cmdq_pkt_jump_rel(struct cmdq_pkt *pkt, s32 offset, u8 shift_pa);
+
+/**
* cmdq_pkt_finalize() - Append EOC and jump command to pkt.
* @pkt: the CMDQ packet
*
@@ -393,6 +407,11 @@ static inline int cmdq_pkt_jump(struct cmdq_pkt *pkt, dma_addr_t addr, u8 shift_
return -EINVAL;
}
+static inline int cmdq_pkt_jump_rel(struct cmdq_pkt *pkt, s32 offset, u8 shift_pa)
+{
+ return -EINVAL;
+}
+
static inline int cmdq_pkt_finalize(struct cmdq_pkt *pkt)
{
return -EINVAL;