| Message ID | 1626418701-28467-2-git-send-email-yongqiang.niu@mediatek.com |
|---|---|
| State | New |
| Headers | show |
| Series | [v1] mailbox: cmdq: add instruction time-out interrupt support | expand |
Hi, Yongqiang: Yongqiang Niu <yongqiang.niu@mediatek.com> 於 2021年7月16日 週五 下午2:58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 de4793e..9a76bcd 100644 > --- a/drivers/mailbox/mtk-cmdq-mailbox.c > +++ b/drivers/mailbox/mtk-cmdq-mailbox.c > @@ -35,6 +35,7 @@ > #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 > > @@ -53,6 +54,15 @@ > #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 I think every client has different timeout value, so it's not a good idea to have a unique timeout value in mailbox controller. Client could use timer or something similar to detect timeout. Regards, Chun-Kuang. > + */ > +#define CMDQ_INSTN_TIMEOUT_CYCLES 22 > + > struct cmdq_thread { > struct mbox_chan *chan; > void __iomem *base; > @@ -368,6 +378,7 @@ 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); > -- > 1.8.1.1.dirty >
diff --git a/drivers/mailbox/mtk-cmdq-mailbox.c b/drivers/mailbox/mtk-cmdq-mailbox.c index de4793e..9a76bcd 100644 --- a/drivers/mailbox/mtk-cmdq-mailbox.c +++ b/drivers/mailbox/mtk-cmdq-mailbox.c @@ -35,6 +35,7 @@ #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 @@ -53,6 +54,15 @@ #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 + */ +#define CMDQ_INSTN_TIMEOUT_CYCLES 22 + struct cmdq_thread { struct mbox_chan *chan; void __iomem *base; @@ -368,6 +378,7 @@ 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);
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(+)