From: Frederic Barrat Date: Tue, 19 Apr 2016 16:34:24 +0000 (+0200) Subject: cxl: Increase timeout for detection of AFU mmio hang X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=4aec6ec0da9c72c0fa1a5b0d1133707481347bb3;p=linux-beck.git cxl: Increase timeout for detection of AFU mmio hang PSL designers recommend a larger value for the mmio hang pulse, 256 us instead of 1 us. The CAIA architecture states that it needs to be smaller than 1/2 of the RTOS timeout set in the PHB for outbound non-posted transactions, which is still (easily) the case here. Signed-off-by: Frederic Barrat Acked-by: Ian Munsie Tested-by: Frank Haverkamp Tested-by: Manoj Kumar Signed-off-by: Michael Ellerman --- diff --git a/drivers/misc/cxl/pci.c b/drivers/misc/cxl/pci.c index c6d5cf5e3793..a08fcc888a71 100644 --- a/drivers/misc/cxl/pci.c +++ b/drivers/misc/cxl/pci.c @@ -375,8 +375,10 @@ static int init_implementation_adapter_regs(struct cxl *adapter, struct pci_dev return -ENODEV; } + psl_dsnctl = 0x0000900000000000ULL; /* pteupd ttype, scdone */ + psl_dsnctl |= (0x2ULL << (63-38)); /* MMIO hang pulse: 256 us */ /* Tell PSL where to route data to */ - psl_dsnctl = 0x0000900002000000ULL | (chipid << (63-5)); + psl_dsnctl |= (chipid << (63-5)); psl_dsnctl |= (capp_unit_id << (63-13)); cxl_p1_write(adapter, CXL_PSL_DSNDCTL, psl_dsnctl);