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Subject[PATCH v6 08/12] soc: mediatek: cmdq: define the instruction struct
Date
Define a instruction structure for gce driver to append command.
This structure can make the client's code more readability.

Signed-off-by: Bibby Hsieh <bibby.hsieh@mediatek.com>
---
drivers/soc/mediatek/mtk-cmdq-helper.c | 113 +++++++++++++++--------
include/linux/mailbox/mtk-cmdq-mailbox.h | 2 +
include/linux/soc/mediatek/mtk-cmdq.h | 14 +--
3 files changed, 84 insertions(+), 45 deletions(-)

diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
index ff9fef5a032b..17ee8196fb3d 100644
--- a/drivers/soc/mediatek/mtk-cmdq-helper.c
+++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
@@ -9,12 +9,24 @@
#include <linux/mailbox_controller.h>
#include <linux/soc/mediatek/mtk-cmdq.h>

-#define CMDQ_ARG_A_WRITE_MASK 0xffff
#define CMDQ_WRITE_ENABLE_MASK BIT(0)
#define CMDQ_EOC_IRQ_EN BIT(0)
#define CMDQ_EOC_CMD ((u64)((CMDQ_CODE_EOC << CMDQ_OP_CODE_SHIFT)) \
<< 32 | CMDQ_EOC_IRQ_EN)

+struct cmdq_instruction {
+ union {
+ u32 value;
+ u32 mask;
+ };
+ union {
+ u16 offset;
+ u16 event;
+ };
+ u8 subsys;
+ u8 op;
+};
+
static void cmdq_client_timeout(struct timer_list *t)
{
struct cmdq_client *client = from_timer(client, t, timer);
@@ -110,10 +122,8 @@ void cmdq_pkt_destroy(struct cmdq_pkt *pkt)
}
EXPORT_SYMBOL(cmdq_pkt_destroy);

-static int cmdq_pkt_append_command(struct cmdq_pkt *pkt, enum cmdq_code code,
- u32 arg_a, u32 arg_b)
+static struct cmdq_instruction *cmdq_pkt_append_command(struct cmdq_pkt *pkt)
{
- u64 *cmd_ptr;

if (unlikely(pkt->cmd_buf_size + CMDQ_INST_SIZE > pkt->buf_size)) {
/*
@@ -127,81 +137,108 @@ static int cmdq_pkt_append_command(struct cmdq_pkt *pkt, enum cmdq_code code,
pkt->cmd_buf_size += CMDQ_INST_SIZE;
WARN_ONCE(1, "%s: buffer size %u is too small !\n",
__func__, (u32)pkt->buf_size);
- return -ENOMEM;
+ return NULL;
}
- cmd_ptr = pkt->va_base + pkt->cmd_buf_size;
- (*cmd_ptr) = (u64)((code << CMDQ_OP_CODE_SHIFT) | arg_a) << 32 | arg_b;
+
pkt->cmd_buf_size += CMDQ_INST_SIZE;

- return 0;
+ return pkt->va_base + pkt->cmd_buf_size - CMDQ_INST_SIZE;
}

-int cmdq_pkt_write(struct cmdq_pkt *pkt, u32 value, u32 subsys, u32 offset)
+int cmdq_pkt_write(struct cmdq_pkt *pkt, u8 subsys, u16 offset, u32 value)
{
- u32 arg_a = (offset & CMDQ_ARG_A_WRITE_MASK) |
- (subsys << CMDQ_SUBSYS_SHIFT);
+ struct cmdq_instruction *inst;
+
+ inst = cmdq_pkt_append_command(pkt);
+ if (!inst)
+ return -ENOMEM;
+
+ inst->op = CMDQ_CODE_WRITE;
+ inst->value = value;
+ inst->offset = offset;
+ inst->subsys = subsys;

- return cmdq_pkt_append_command(pkt, CMDQ_CODE_WRITE, arg_a, value);
+ return 0;
}
EXPORT_SYMBOL(cmdq_pkt_write);

-int cmdq_pkt_write_mask(struct cmdq_pkt *pkt, u32 value,
- u32 subsys, u32 offset, u32 mask)
+int cmdq_pkt_write_mask(struct cmdq_pkt *pkt, u8 subsys, u16 offset,
+ u32 value, u32 mask)
{
+ struct cmdq_instruction *inst;
u32 offset_mask = offset;
- int err = 0;

if (mask != 0xffffffff) {
- err = cmdq_pkt_append_command(pkt, CMDQ_CODE_MASK, 0, ~mask);
+ inst = cmdq_pkt_append_command(pkt);
+ if (!inst)
+ return -ENOMEM;
+
+ inst->op = CMDQ_CODE_MASK;
+ inst->mask = ~mask;
offset_mask |= CMDQ_WRITE_ENABLE_MASK;
}
- err |= cmdq_pkt_write(pkt, value, subsys, offset_mask);

- return err;
+ return cmdq_pkt_write(pkt, subsys, offset_mask, value);
}
EXPORT_SYMBOL(cmdq_pkt_write_mask);

-int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u32 event)
+int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event)
{
- u32 arg_b;
+ struct cmdq_instruction *inst;

if (event >= CMDQ_MAX_EVENT)
return -EINVAL;

- /*
- * WFE arg_b
- * bit 0-11: wait value
- * bit 15: 1 - wait, 0 - no wait
- * bit 16-27: update value
- * bit 31: 1 - update, 0 - no update
- */
- arg_b = CMDQ_WFE_UPDATE | CMDQ_WFE_WAIT | CMDQ_WFE_WAIT_VALUE;
+ inst = cmdq_pkt_append_command(pkt);
+ if (!inst)
+ return -ENOMEM;
+
+ inst->op = CMDQ_CODE_WFE;
+ inst->value = CMDQ_WFE_OPTION;
+ inst->event = event;

- return cmdq_pkt_append_command(pkt, CMDQ_CODE_WFE, event, arg_b);
+ return 0;
}
EXPORT_SYMBOL(cmdq_pkt_wfe);

-int cmdq_pkt_clear_event(struct cmdq_pkt *pkt, u32 event)
+int cmdq_pkt_clear_event(struct cmdq_pkt *pkt, u16 event)
{
+ struct cmdq_instruction *inst;
+
if (event >= CMDQ_MAX_EVENT)
return -EINVAL;

- return cmdq_pkt_append_command(pkt, CMDQ_CODE_WFE, event,
- CMDQ_WFE_UPDATE);
+ inst = cmdq_pkt_append_command(pkt);
+ if (!inst)
+ return -ENOMEM;
+
+ inst->op = CMDQ_CODE_WFE;
+ inst->value = CMDQ_WFE_UPDATE;
+ inst->event = event;
+
+ return 0;
}
EXPORT_SYMBOL(cmdq_pkt_clear_event);

static int cmdq_pkt_finalize(struct cmdq_pkt *pkt)
{
- int err;
+ struct cmdq_instruction *inst;
+
+ inst = cmdq_pkt_append_command(pkt);
+ if (!inst)
+ return -ENOMEM;

- /* insert EOC and generate IRQ for each command iteration */
- err = cmdq_pkt_append_command(pkt, CMDQ_CODE_EOC, 0, CMDQ_EOC_IRQ_EN);
+ inst->op = CMDQ_CODE_EOC;
+ inst->value = CMDQ_EOC_IRQ_EN;

- /* JUMP to end */
- err |= cmdq_pkt_append_command(pkt, CMDQ_CODE_JUMP, 0, CMDQ_JUMP_PASS);
+ inst = cmdq_pkt_append_command(pkt);
+ if (!inst)
+ return -ENOMEM;
+
+ inst->op = CMDQ_CODE_JUMP;
+ inst->value = CMDQ_JUMP_PASS;

- return err;
+ return 0;
}

static void cmdq_pkt_flush_async_cb(struct cmdq_cb_data data)
diff --git a/include/linux/mailbox/mtk-cmdq-mailbox.h b/include/linux/mailbox/mtk-cmdq-mailbox.h
index 911475da7a53..f21801d32a3a 100644
--- a/include/linux/mailbox/mtk-cmdq-mailbox.h
+++ b/include/linux/mailbox/mtk-cmdq-mailbox.h
@@ -19,6 +19,8 @@
#define CMDQ_WFE_UPDATE BIT(31)
#define CMDQ_WFE_WAIT BIT(15)
#define CMDQ_WFE_WAIT_VALUE 0x1
+#define CMDQ_WFE_OPTION (CMDQ_WFE_UPDATE | CMDQ_WFE_WAIT | \
+ CMDQ_WFE_WAIT_VALUE)
/** cmdq event maximum */
#define CMDQ_MAX_EVENT 0x3ff

diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
index 4e8899972db4..52f69c8db8de 100644
--- a/include/linux/soc/mediatek/mtk-cmdq.h
+++ b/include/linux/soc/mediatek/mtk-cmdq.h
@@ -60,26 +60,26 @@ void cmdq_pkt_destroy(struct cmdq_pkt *pkt);
/**
* cmdq_pkt_write() - append write command to the CMDQ packet
* @pkt: the CMDQ packet
- * @value: the specified target register value
* @subsys: the CMDQ sub system code
* @offset: register offset from CMDQ sub system
+ * @value: the specified target register value
*
* Return: 0 for success; else the error code is returned
*/
-int cmdq_pkt_write(struct cmdq_pkt *pkt, u32 value, u32 subsys, u32 offset);
+int cmdq_pkt_write(struct cmdq_pkt *pkt, u8 subsys, u16 offset, u32 value);

/**
* cmdq_pkt_write_mask() - append write command with mask to the CMDQ packet
* @pkt: the CMDQ packet
- * @value: the specified target register value
* @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_write_mask(struct cmdq_pkt *pkt, u32 value,
- u32 subsys, u32 offset, u32 mask);
+int cmdq_pkt_write_mask(struct cmdq_pkt *pkt, u8 subsys, u16 offset,
+ u32 value, u32 mask);

/**
* cmdq_pkt_wfe() - append wait for event command to the CMDQ packet
@@ -88,7 +88,7 @@ int cmdq_pkt_write_mask(struct cmdq_pkt *pkt, u32 value,
*
* Return: 0 for success; else the error code is returned
*/
-int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u32 event);
+int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event);

/**
* cmdq_pkt_clear_event() - append clear event command to the CMDQ packet
@@ -97,7 +97,7 @@ int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u32 event);
*
* Return: 0 for success; else the error code is returned
*/
-int cmdq_pkt_clear_event(struct cmdq_pkt *pkt, u32 event);
+int cmdq_pkt_clear_event(struct cmdq_pkt *pkt, u16 event);

/**
* cmdq_pkt_flush_async() - trigger CMDQ to asynchronously execute the CMDQ
--
2.18.0
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