diff options
| author | Frederic Barrat <fbarrat@linux.vnet.ibm.com> | 2016-04-19 19:34:24 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2016-04-22 14:45:50 +0300 |
| commit | 4aec6ec0da9c72c0fa1a5b0d1133707481347bb3 (patch) | |
| tree | ea21bd18bfaa947d1163389a5896a2c3a6f68aca /drivers/misc | |
| parent | e009a7e858fed215cb4eed5174a31cadd42d8797 (diff) | |
| download | linux-4aec6ec0da9c72c0fa1a5b0d1133707481347bb3.tar.xz | |
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 <fbarrat@linux.vnet.ibm.com>
Acked-by: Ian Munsie <imunsie@au1.ibm.com>
Tested-by: Frank Haverkamp <haver@linux.vnet.ibm.com>
Tested-by: Manoj Kumar <manoj@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/cxl/pci.c | 4 |
1 files changed, 3 insertions, 1 deletions
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); |