[PATCH v3 09/12] soc: mediatek: cmdq: add polling function

Bibby Hsieh
2019-03-28T02:19:30Z

add polling function in cmdq helper functions

Signed-off-by: Bibby Hsieh <bibby.hsieh@mediatek.com>
---
drivers/soc/mediatek/mtk-cmdq-helper.c | 30 ++++++++++++++++++++++++++++++
include/linux/mailbox/mtk-cmdq-mailbox.h | 1 +
include/linux/soc/mediatek/mtk-cmdq.h | 15 +++++++++++++++
3 files changed, 46 insertions(+)

diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
index d3873ab..80856b8 100644
--- a/drivers/soc/mediatek/mtk-cmdq-helper.c
+++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
@@ -231,6 +231,36 @@ int cmdq_pkt_clear_event(struct cmdq_pkt *pkt, u16 event)
}
EXPORT_SYMBOL(cmdq_pkt_clear_event);

+int cmdq_pkt_poll(struct cmdq_pkt *pkt, u8 subsys,
+ u16 offset, u32 value, u32 mask)
+{
+ int err;
+
+ if (mask != 0xffffffff) {
+ err = cmdq_pkt_append_command(pkt, CMDQ_GET_ARG_C(~mask),
+ CMDQ_GET_ARG_B(~mask),
+ CMDQ_IMMEDIATE_VALUE,
+ CMDQ_IMMEDIATE_VALUE,
+ CMDQ_IMMEDIATE_VALUE,
+ CMDQ_IMMEDIATE_VALUE,
+ CMDQ_IMMEDIATE_VALUE,
+ CMDQ_CODE_MASK);
+
+ if (err != 0)
+ return err;
+ }
+ offset = offset | 0x1;
+
+ return cmdq_pkt_append_command(pkt, CMDQ_GET_ARG_C(value),
+ CMDQ_GET_ARG_B(value),
+ offset, subsys,
+ CMDQ_IMMEDIATE_VALUE,
+ CMDQ_IMMEDIATE_VALUE,
+ CMDQ_IMMEDIATE_VALUE,
+ CMDQ_CODE_POLL);
+}
+EXPORT_SYMBOL(cmdq_pkt_poll);
+
static int cmdq_pkt_finalize(struct cmdq_pkt *pkt)
{
int err;
diff --git a/include/linux/mailbox/mtk-cmdq-mailbox.h b/include/linux/mailbox/mtk-cmdq-mailbox.h
index f21801d..1dfd5ed 100644
--- a/include/linux/mailbox/mtk-cmdq-mailbox.h
+++ b/include/linux/mailbox/mtk-cmdq-mailbox.h
@@ -46,6 +46,7 @@
enum cmdq_code {
CMDQ_CODE_MASK = 0x02,
CMDQ_CODE_WRITE = 0x04,
+ CMDQ_CODE_POLL = 0x08,
CMDQ_CODE_JUMP = 0x10,
CMDQ_CODE_WFE = 0x20,
CMDQ_CODE_EOC = 0x40,
diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
index 52f69c8..0651a0b 100644
--- a/include/linux/soc/mediatek/mtk-cmdq.h
+++ b/include/linux/soc/mediatek/mtk-cmdq.h
@@ -100,6 +100,21 @@ int cmdq_pkt_write_mask(struct cmdq_pkt *pkt, u8 subsys, u16 offset,
int cmdq_pkt_clear_event(struct cmdq_pkt *pkt, u16 event);

/**
+ * cmdq_pkt_poll() - Append polling command to the CMDQ packet, ask GCE to
+ * execute an instruction that wait for a specified hardware
+ * register to check for the value. All GCE hardware
+ * threads will be blocked by this instruction.
+ * @pkt: the CMDQ packet
+ * @subsys: the CMDQ sub system code
+ * @offset: register offset from CMDQ sub system
+ * @value: the specified target register value
+ * @mask: the specified target register mask
+ *
+ * Return: 0 for success; else the error code is returned
+ */
+int cmdq_pkt_poll(struct cmdq_pkt *pkt, u8 subsys,
+ u16 offset, u32 value, u32 mask);
+/**
* cmdq_pkt_flush_async() - trigger CMDQ to asynchronously execute the CMDQ
* packet and call back at the end of done packet
* @pkt: the CMDQ packet
--
1.9.1