diff --git a/drivers/accel/habanalabs/common/habanalabs.h b/drivers/accel/habanalabs/common/habanalabs.h index a06e5a966f45..6f27ce4fa01b 100644 --- a/drivers/accel/habanalabs/common/habanalabs.h +++ b/drivers/accel/habanalabs/common/habanalabs.h @@ -2729,11 +2729,16 @@ void hl_wreg(struct hl_device *hdev, u32 reg, u32 val); * updated directly by the device. If false, the host memory being polled will * be updated by host CPU. Required so host knows whether or not the memory * might need to be byte-swapped before returning value to caller. + * + * On the first 4 polling iterations the macro goes to sleep for short period of + * time that gradually increases and reaches sleep_us on the fifth iteration. */ #define hl_poll_timeout_memory(hdev, addr, val, cond, sleep_us, timeout_us, \ mem_written_by_device) \ ({ \ + u64 __sleep_step_us; \ ktime_t __timeout; \ + u8 __step = 8; \ \ __timeout = ktime_add_us(ktime_get(), timeout_us); \ might_sleep_if(sleep_us); \ @@ -2751,8 +2756,10 @@ void hl_wreg(struct hl_device *hdev, u32 reg, u32 val); (val) = le32_to_cpu(*(__le32 *) &(val)); \ break; \ } \ - if (sleep_us) \ - usleep_range((sleep_us >> 2) + 1, sleep_us); \ + __sleep_step_us = sleep_us >> __step; \ + if (__sleep_step_us) \ + usleep_range((__sleep_step_us >> 2) + 1, __sleep_step_us); \ + __step >>= 1; \ } \ (cond) ? 0 : -ETIMEDOUT; \ })