Author: jhibbits
Date: Sun Nov 10 04:24:36 2019
New Revision: 354584
URL: https://svnweb.freebsd.org/changeset/base/354584
Log:
powerpc64/powernv: Use OPAL call for non-POWER8 PCI TCE reset
According to the OPAL documentation, only the POWER8 (PHB3) should use
the register write TCE reset method. All others should use the OPAL
call.
On POWER9 the call is semantically identical to the register write, with
a wait for completion.
Modified:
head/sys/powerpc/powernv/opal.h
head/sys/powerpc/powernv/opal_pci.c
Modified: head/sys/powerpc/powernv/opal.h
==============================================================================
--- head/sys/powerpc/powernv/opal.h Sun Nov 10 03:45:16 2019
(r354583)
+++ head/sys/powerpc/powernv/opal.h Sun Nov 10 04:24:36 2019
(r354584)
@@ -129,6 +129,11 @@ int opal_call(uint64_t token, ...);
#define OPAL_IGNORE_RID_FUNC_NUMBER 0
#define OPAL_COMPARE_RID_FUNC_NUMBER 1
+/* For OPAL_PCI_TCE_KILL */
+#define OPAL_PCI_TCE_KILL_PAGE 0
+#define OPAL_PCI_TCE_KILL_PE 1
+#define OPAL_PCI_TCE_KILL_ALL 2
+
#define OPAL_SUCCESS 0
#define OPAL_PARAMETER -1
#define OPAL_BUSY -2
Modified: head/sys/powerpc/powernv/opal_pci.c
==============================================================================
--- head/sys/powerpc/powernv/opal_pci.c Sun Nov 10 03:45:16 2019
(r354583)
+++ head/sys/powerpc/powernv/opal_pci.c Sun Nov 10 04:24:36 2019
(r354584)
@@ -409,10 +409,12 @@ opalpci_attach(device_t dev)
/*
* Invalidate all previous TCE entries.
- *
- * TODO: add support for other PHBs than PHB3
*/
- pci_phb3_tce_invalidate_entire(sc);
+ if (ofw_bus_is_compatible(dev, "power8-pciex"))
+ pci_phb3_tce_invalidate_entire(sc);
+ else
+ opal_call(OPAL_PCI_TCE_KILL, sc->phb_id, OPAL_PCI_TCE_KILL_ALL,
+ OPAL_PCI_DEFAULT_PE, 0, 0, 0);
/*
* Get MSI properties
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