Re: [PATCH 08/10] soc: mediatek: add packet encoder function

From: Pi-Hsun Shih
Date: Wed Jan 30 2019 - 01:01:55 EST

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Previous message: Pi-Hsun Shih: "Re: [PATCH 07/10] soc: mediatek: add cmdq_dev_get_event function"
In reply to: Bibby Hsieh: "[PATCH 08/10] soc: mediatek: add packet encoder function"
Next in thread: Bibby Hsieh: "[PATCH 07/10] soc: mediatek: add cmdq_dev_get_event function"
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On 01/29/2019 03:32 PM, Bibby Hsieh wrote:

Implement a function can encode the GCE instructions

Signed-off-by: Bibby Hsieh <bibby.hsieh@xxxxxxxxxxxx>
---
drivers/soc/mediatek/mtk-cmdq-helper.c | 102 ++++++++++++++++++++-----------
include/linux/mailbox/mtk-cmdq-mailbox.h | 2 +
include/linux/soc/mediatek/mtk-cmdq.h | 14 ++---
3 files changed, 76 insertions(+), 42 deletions(-)

diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
index 16c0393..923a815 100644
--- a/drivers/soc/mediatek/mtk-cmdq-helper.c
+++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
@@ -9,11 +9,43 @@
#include <linux/mailbox_controller.h>
#include <linux/soc/mediatek/mtk-cmdq.h>
-#define CMDQ_ARG_A_WRITE_MASK 0xffff
+#define CMDQ_GET_ARG_B(arg) (((arg) & GENMASK(31, 16)) >> 16)
+#define CMDQ_GET_ARG_C(arg) ((arg) & GENMASK(15, 0))
#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)
+#define CMDQ_IMMEDIATE_VALUE 0
+#define CMDQ_REG_TYPE 1
+
+struct cmdq_instruction {
+ s16 arg_c:16;
+ s16 arg_b:16;
+ s16 arg_a:16;
+ u8 s_op:5;
+ u8 arg_c_type:1;
+ u8 arg_b_type:1;
+ u8 arg_a_type:1;
+ u8 op:8;
+};
+
+static void cmdq_pkt_instr_encoder(struct cmdq_pkt *pkt, s16 arg_c, s16 arg_b,
+ s16 arg_a, u8 s_op, u8 arg_c_type,
+ u8 arg_b_type, u8 arg_a_type, u8 op)
+{
+ struct cmdq_instruction *cmdq_inst;
+
+ cmdq_inst = pkt->va_base + pkt->cmd_buf_size;
+ cmdq_inst->op = op;
+ cmdq_inst->arg_a_type = arg_a_type;
+ cmdq_inst->arg_b_type = arg_b_type;
+ cmdq_inst->arg_c_type = arg_c_type;
+ cmdq_inst->s_op = s_op;
+ cmdq_inst->arg_a = arg_a;
+ cmdq_inst->arg_b = arg_b;
+ cmdq_inst->arg_c = arg_c;
+ pkt->cmd_buf_size += CMDQ_INST_SIZE;
+}
u8 cmdq_subsys_base_to_id(struct cmdq_base *clt_base, u32 base)
{
@@ -180,10 +212,11 @@ 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 int cmdq_pkt_append_command(struct cmdq_pkt *pkt, s16 arg_c, s16 arg_b,
+ s16 arg_a, u8 s_op, u8 arg_c_type,
+ u8 arg_b_type, u8 arg_a_type,
+ enum cmdq_code code)
{
- u64 *cmd_ptr;
if (unlikely(pkt->cmd_buf_size + CMDQ_INST_SIZE > pkt->buf_size)) {
/*
@@ -199,65 +232,59 @@ static int cmdq_pkt_append_command(struct cmdq_pkt *pkt, enum cmdq_code code,
__func__, (u32)pkt->buf_size);
return -ENOMEM;
}
- 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;
+ cmdq_pkt_instr_encoder(pkt, arg_c, arg_b, arg_a, s_op, arg_c_type,
+ arg_b_type, arg_a_type, code);
return 0;
}
-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);
-
- return cmdq_pkt_append_command(pkt, CMDQ_CODE_WRITE, arg_a, value);
+ 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_WRITE);

All other codes use 0 instead of CMDQ_IMMEDIATE_VALUE. Also use 0 here
or use CMDQ_IMMEDIATE_VALUE at other places too?

}
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)
{
u32 offset_mask = offset;
int err = 0;
if (mask != 0xffffffff) {
- err = cmdq_pkt_append_command(pkt, CMDQ_CODE_MASK, 0, ~mask);
+ err = cmdq_pkt_append_command(pkt, CMDQ_GET_ARG_C(~mask),
+ CMDQ_GET_ARG_B(~mask), 0, 0, 0, 0,
+ 0, CMDQ_CODE_MASK);
offset_mask |= CMDQ_WRITE_ENABLE_MASK;
}
- err |= cmdq_pkt_write(pkt, value, subsys, offset_mask);
+ err |= cmdq_pkt_write(pkt, subsys, offset_mask, value);

I know that the code was already that way before, but why do you or
the 2 return values, instead of just returning early if
cmdq_pkt_append_command fails?

return err;
}
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;
-
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;
-
- return cmdq_pkt_append_command(pkt, CMDQ_CODE_WFE, event, arg_b);
+ return cmdq_pkt_append_command(pkt, CMDQ_GET_ARG_C(CMDQ_WFE_OPTION),
+ CMDQ_GET_ARG_B(CMDQ_WFE_OPTION), event,
+ 0, 0, 0, 0, CMDQ_CODE_WFE);
}
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)
{
if (event >= CMDQ_MAX_EVENT)
return -EINVAL;
- return cmdq_pkt_append_command(pkt, CMDQ_CODE_WFE, event,
- CMDQ_WFE_UPDATE);
+ return cmdq_pkt_append_command(pkt, CMDQ_GET_ARG_C(CMDQ_WFE_UPDATE),
+ CMDQ_GET_ARG_B(CMDQ_WFE_UPDATE), event,
+ 0, 0, 0, 0, CMDQ_CODE_WFE);
}
EXPORT_SYMBOL(cmdq_pkt_clear_event);
@@ -266,10 +293,15 @@ static int cmdq_pkt_finalize(struct cmdq_pkt *pkt)
int err;
/* insert EOC and generate IRQ for each command iteration */
- err = cmdq_pkt_append_command(pkt, CMDQ_CODE_EOC, 0, CMDQ_EOC_IRQ_EN);
-
+ err = cmdq_pkt_append_command(pkt, CMDQ_GET_ARG_C(CMDQ_EOC_IRQ_EN),
+ CMDQ_GET_ARG_B(CMDQ_EOC_IRQ_EN),
+ 0, 0, 0, 0, 0, CMDQ_CODE_EOC);
+ if (err < 0)
+ return err;
/* JUMP to end */
- err |= cmdq_pkt_append_command(pkt, CMDQ_CODE_JUMP, 0, CMDQ_JUMP_PASS);
+ err = cmdq_pkt_append_command(pkt, CMDQ_GET_ARG_C(CMDQ_JUMP_PASS),
+ CMDQ_GET_ARG_B(CMDQ_JUMP_PASS),
+ 0, 0, 0, 0, 0, CMDQ_CODE_JUMP);
return err;
}
diff --git a/include/linux/mailbox/mtk-cmdq-mailbox.h b/include/linux/mailbox/mtk-cmdq-mailbox.h
index 911475da..f21801d 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 e5b0a98..e4d1876 100644
--- a/include/linux/soc/mediatek/mtk-cmdq.h
+++ b/include/linux/soc/mediatek/mtk-cmdq.h
@@ -70,26 +70,26 @@ struct cmdq_client *cmdq_mbox_create(struct device *dev, int index,
/**
* 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
@@ -98,7 +98,7 @@ 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
@@ -107,7 +107,7 @@ int cmdq_pkt_write_mask(struct cmdq_pkt *pkt, u32 value,
*
* Return: 0 for success; else the error code is returned
*/
-int cmdq_pkt_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

Next message: Peter Shih: "Re: [PATCH] thermal: mtk: Allocate enough space for mtk_thermal."
Previous message: Pi-Hsun Shih: "Re: [PATCH 07/10] soc: mediatek: add cmdq_dev_get_event function"
In reply to: Bibby Hsieh: "[PATCH 08/10] soc: mediatek: add packet encoder function"
Next in thread: Bibby Hsieh: "[PATCH 07/10] soc: mediatek: add cmdq_dev_get_event function"
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