[Skiboot] [PATCH v2 6/7] npu2-opencapi: Extend delay after releasing reset on adapter

Frederic Barrat fbarrat at linux.ibm.com
Wed Mar 13 07:35:14 AEDT 2019

Give more time to the FPGA to process the reset signal. The previous
delay, 5ms, is too short for newer adapters with bigger FPGAs. Extend
it to 250ms.
Ultimately, that delay will likely end up being added to the opencapi
specification, but we are not there yet.

Signed-off-by: Frederic Barrat <fbarrat at linux.ibm.com>
Reviewed-by: Andrew Donnellan <andrew.donnellan at au1.ibm.com>

v2: no change

 hw/npu2-opencapi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/npu2-opencapi.c b/hw/npu2-opencapi.c
index 223888e6..e4e3ae63 100644
--- a/hw/npu2-opencapi.c
+++ b/hw/npu2-opencapi.c
@@ -1198,8 +1198,8 @@ static int64_t npu2_opencapi_freset(struct pci_slot *slot)
-		/* give 5ms to device to be ready */
-		return pci_slot_set_sm_timeout(slot, msecs_to_tb(5));
+		/* give 250ms to device to be ready */
+		return pci_slot_set_sm_timeout(slot, msecs_to_tb(250));
 		if (dev->train_fenced) {

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