Commit b2ff2356 authored by Bibby Hsieh's avatar Bibby Hsieh Committed by Matthias Brugger
Browse files

soc: mediatek: cmdq: add polling function 



add polling function in cmdq helper functions

Signed-off-by: default avatarBibby Hsieh <bibby.hsieh@mediatek.com>
Reviewed-by: default avatarCK Hu <ck.hu@mediatek.com>
Signed-off-by: default avatarMatthias Brugger <matthias.bgg@gmail.com>
parent 5c8b718c

drivers/soc/mediatek/mtk-cmdq-helper.c

+36 −0
Original line number Diff line number Diff line
@@ -10,6 +10,7 @@ 
#include <linux/soc/mediatek/mtk-cmdq.h>



#define CMDQ_WRITE_ENABLE_MASK	BIT(0)

#define CMDQ_POLL_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)
@@ -214,6 +215,41 @@ 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)

{

	struct cmdq_instruction inst = { {0} };

	int err;



	inst.op = CMDQ_CODE_POLL;

	inst.value = value;

	inst.offset = offset;

	inst.subsys = subsys;

	err = cmdq_pkt_append_command(pkt, inst);



	return err;

}

EXPORT_SYMBOL(cmdq_pkt_poll);



int cmdq_pkt_poll_mask(struct cmdq_pkt *pkt, u8 subsys,

		       u16 offset, u32 value, u32 mask)

{

	struct cmdq_instruction inst = { {0} };

	int err;



	inst.op = CMDQ_CODE_MASK;

	inst.mask = ~mask;

	err = cmdq_pkt_append_command(pkt, inst);

	if (err < 0)

		return err;



	offset = offset | CMDQ_POLL_ENABLE_MASK;

	err = cmdq_pkt_poll(pkt, subsys, offset, value);



	return err;

}

EXPORT_SYMBOL(cmdq_pkt_poll_mask);



static int cmdq_pkt_finalize(struct cmdq_pkt *pkt)

{

	struct cmdq_instruction inst = { {0} };

include/linux/mailbox/mtk-cmdq-mailbox.h

+1 −0
Original line number Diff line number Diff line
@@ -55,6 +55,7 @@ 
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,

include/linux/soc/mediatek/mtk-cmdq.h

+32 −0
Original line number Diff line number Diff line
@@ -99,6 +99,38 @@ int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event); 
 */

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 w/o mask.

 *		     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

 *

 * Return: 0 for success; else the error code is returned

 */

int cmdq_pkt_poll(struct cmdq_pkt *pkt, u8 subsys,

		  u16 offset, u32 value);



/**

 * cmdq_pkt_poll_mask() - 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 w/ mask.

 *		          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_mask(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

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