On Tue, 2021-10-05 at 07:41 +0800, Chun-Kuang Hu wrote:
Hi, Yongqiang:
Yongqiang Niu yongqiang.niu@mediatek.com 於 2021年9月30日 週四 下午9:18寫道：
add time-out cycle setting to make sure time-out interrupt irq will happened when instruction time-out for wait and poll
Signed-off-by: Yongqiang Niu yongqiang.niu@mediatek.com
drivers/mailbox/mtk-cmdq-mailbox.c | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/drivers/mailbox/mtk-cmdq-mailbox.c b/drivers/mailbox/mtk-cmdq-mailbox.c index 64175a893312..197b03222f94 100644 --- a/drivers/mailbox/mtk-cmdq-mailbox.c +++ b/drivers/mailbox/mtk-cmdq-mailbox.c @@ -36,6 +36,7 @@ #define CMDQ_THR_END_ADDR 0x24 #define CMDQ_THR_WAIT_TOKEN 0x30 #define CMDQ_THR_PRIORITY 0x40 +#define CMDQ_THR_INSTN_TIMEOUT_CYCLES 0x50
#define GCE_GCTL_VALUE 0x48
@@ -54,6 +55,15 @@ #define CMDQ_JUMP_BY_OFFSET 0x10000000 #define CMDQ_JUMP_BY_PA 0x10000001
+/*
- instruction time-out
- cycles to issue instruction time-out interrupt for wait and
poll instructions
- GCE axi_clock 156MHz
- 1 cycle = 6.41ns
- instruction time out 2^22*2*6.41ns = 53ms
For different clients, the timeout value would be different, and each client could use timer to detect timeout, so it's not necessary to enable timeout in cmdq driver.
Regards, Chun-Kuang.
if we do not set cmdq hardware timeout, this condition will never happen cmdq_thread_irq_handler if (irq_flag & CMDQ_THR_IRQ_ERROR) err = true;
and no error callback else if (err) { cmdq_task_exec_done(task, -ENOEXEC); cmdq_task_handle_error(curr_task); kfree(task); } the client will never received the error callback, cmdq hardware will poll the event for ever and no report timeout
- */
+#define CMDQ_INSTN_TIMEOUT_CYCLES 22
struct cmdq_thread { struct mbox_chan *chan; void __iomem *base; @@ -376,6 +386,7 @@ static int cmdq_mbox_send_data(struct mbox_chan *chan, void *data) writel((task->pa_base + pkt->cmd_buf_size) >> cmdq-
shift_pa,
thread->base + CMDQ_THR_END_ADDR);
writel(CMDQ_INSTN_TIMEOUT_CYCLES, thread->base +CMDQ_THR_INSTN_TIMEOUT_CYCLES); writel(thread->priority, thread->base + CMDQ_THR_PRIORITY); writel(CMDQ_THR_IRQ_EN, thread->base + CMDQ_THR_IRQ_ENABLE); writel(CMDQ_THR_ENABLED, thread->base + CMDQ_THR_ENABLE_TASK); -- 2.25.1