GCE cannot know the register base address, we store the subsys-base address relationship in the device node, and store the relationship by cmdq_register_device function.
When the client pass the base address and offset into GCE API, we will get the subsys ID by this API. Signed-off-by: Bibby Hsieh <[email protected]> --- drivers/soc/mediatek/mtk-cmdq-helper.c | 17 +++++++++++++++++ include/linux/soc/mediatek/mtk-cmdq.h | 12 ++++++++++++ 2 files changed, 29 insertions(+) diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c index ff9fef5..6e4b85e 100644 --- a/drivers/soc/mediatek/mtk-cmdq-helper.c +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c @@ -15,6 +15,23 @@ #define CMDQ_EOC_CMD ((u64)((CMDQ_CODE_EOC << CMDQ_OP_CODE_SHIFT)) \ << 32 | CMDQ_EOC_IRQ_EN) +u8 cmdq_subsys_base_to_id(struct cmdq_base *clt_base, u32 base) +{ + u8 i; + + if (!clt_base) + return -EINVAL; + + base = base & 0xFFFF0000; + for (i = 0; i < clt_base->count; i++) { + if (clt_base->subsys[i].base == base) + return clt_base->subsys[i].id; + } + + return -EINVAL; +} +EXPORT_SYMBOL(cmdq_subsys_base_to_id); + static void cmdq_client_timeout(struct timer_list *t) { struct cmdq_client *client = from_timer(client, t, timer); diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h index 4e88999..0c7a6ee 100644 --- a/include/linux/soc/mediatek/mtk-cmdq.h +++ b/include/linux/soc/mediatek/mtk-cmdq.h @@ -15,6 +15,16 @@ struct cmdq_pkt; +struct cmdq_subsys { + u32 base; + u8 id; +}; + +struct cmdq_base { + struct cmdq_subsys subsys[32]; + u8 count; +}; + struct cmdq_client { spinlock_t lock; u32 pkt_cnt; @@ -127,4 +137,6 @@ int cmdq_pkt_flush_async(struct cmdq_pkt *pkt, cmdq_async_flush_cb cb, */ int cmdq_pkt_flush(struct cmdq_pkt *pkt); +u8 cmdq_subsys_base_to_id(struct cmdq_base *clt_base, u32 base); + #endif /* __MTK_CMDQ_H__ */ -- 1.9.1
