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soc: mediatek: cmdq: define the instruction struct

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Define an 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>
Reviewed-by: CK Hu <ck.hu@mediatek.com>
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
This commit is contained in:
Bibby Hsieh 2019-11-21 09:54:07 +08:00 committed by Matthias Brugger
parent 01d1b408ec
commit 5c8b718c5a
2 changed files with 59 additions and 24 deletions
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73
drivers/soc/mediatek/mtk-cmdq-helper.c
View file

@ -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 +122,10 @@ 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,
struct cmdq_instruction inst)
{
u64 *cmd_ptr;
struct cmdq_instruction *cmd_ptr;
if (unlikely(pkt->cmd_buf_size + CMDQ_INST_SIZE > pkt->buf_size)) {
/*
@ -129,8 +141,9 @@ 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;
*cmd_ptr = inst;
pkt->cmd_buf_size += CMDQ_INST_SIZE;
return 0;
@ -138,21 +151,28 @@ static int cmdq_pkt_append_command(struct cmdq_pkt *pkt, enum cmdq_code code,
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;
return cmdq_pkt_append_command(pkt, CMDQ_CODE_WRITE, arg_a, value);
inst.op = CMDQ_CODE_WRITE;
inst.value = value;
inst.offset = offset;
inst.subsys = subsys;
return cmdq_pkt_append_command(pkt, inst);
}
EXPORT_SYMBOL(cmdq_pkt_write);
int cmdq_pkt_write_mask(struct cmdq_pkt *pkt, u8 subsys,
u16 offset, u32 value, u32 mask)
{
u32 offset_mask = offset;
struct cmdq_instruction inst = { {0} };
u16 offset_mask = offset;
int err;
if (mask != 0xffffffff) {
err = cmdq_pkt_append_command(pkt, CMDQ_CODE_MASK, 0, ~mask);
inst.op = CMDQ_CODE_MASK;
inst.mask = ~mask;
err = cmdq_pkt_append_command(pkt, inst);
if (err < 0)
return err;
@ -166,45 +186,50 @@ EXPORT_SYMBOL(cmdq_pkt_write_mask);
int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event)
{
u32 arg_b;
struct cmdq_instruction inst = { {0} };
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.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 cmdq_pkt_append_command(pkt, inst);
}
EXPORT_SYMBOL(cmdq_pkt_wfe);
int cmdq_pkt_clear_event(struct cmdq_pkt *pkt, u16 event)
{
struct cmdq_instruction inst = { {0} };
if (event >= CMDQ_MAX_EVENT)
return -EINVAL;
return cmdq_pkt_append_command(pkt, CMDQ_CODE_WFE, event,
CMDQ_WFE_UPDATE);
inst.op = CMDQ_CODE_WFE;
inst.value = CMDQ_WFE_UPDATE;
inst.event = event;
return cmdq_pkt_append_command(pkt, inst);
}
EXPORT_SYMBOL(cmdq_pkt_clear_event);
static int cmdq_pkt_finalize(struct cmdq_pkt *pkt)
{
struct cmdq_instruction inst = { {0} };
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);
inst.op = CMDQ_CODE_EOC;
inst.value = CMDQ_EOC_IRQ_EN;
err = cmdq_pkt_append_command(pkt, inst);
if (err < 0)
return err;
/* JUMP to end */
err = cmdq_pkt_append_command(pkt, CMDQ_CODE_JUMP, 0, CMDQ_JUMP_PASS);
inst.op = CMDQ_CODE_JUMP;
inst.value = CMDQ_JUMP_PASS;
err = cmdq_pkt_append_command(pkt, inst);
return err;
}

10
include/linux/mailbox/mtk-cmdq-mailbox.h
View file

@ -20,6 +20,16 @@
#define CMDQ_WFE_WAIT BIT(15)
#define CMDQ_WFE_WAIT_VALUE 0x1
/*
* 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
*/
#define CMDQ_WFE_OPTION (CMDQ_WFE_UPDATE | CMDQ_WFE_WAIT | \
CMDQ_WFE_WAIT_VALUE)
/** cmdq event maximum */
#define CMDQ_MAX_EVENT 0x3ff