diff mbox

[RFC,2/3] powerpc/powernv: add opal_pci_get_phb_capi_mode() call

Message ID c1566d41802d5ebec3c9d5cbe7195f74c0877dca.1474022276.git-series.andrew.donnellan@au1.ibm.com (mailing list archive)
State RFC
Headers show

Commit Message

Andrew Donnellan Sept. 16, 2016, 10:39 a.m. UTC 
opal_pci_get_phb_capi_mode() returns OPAL_PHB_CAPI_MODE_CAPI if the PHB is
in CAPI mode, and OPAL_PHB_CAPI_MODE_PCIE if it isn't.

We're going to use this call to determine if a PHB requires a complete
reset during initialisation in order to disable CAPI mode (on sufficiently
new skiboots that support this).

Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>

---

Corresponding skiboot RFC: http://patchwork.ozlabs.org/patch/670781/
---
 arch/powerpc/include/asm/opal-api.h            | 3 ++-
 arch/powerpc/include/asm/opal.h                | 1 +
 arch/powerpc/platforms/powernv/opal-wrappers.S | 1 +
 3 files changed, 4 insertions(+), 1 deletion(-)
diff mbox

Patch

diff --git a/arch/powerpc/include/asm/opal-api.h b/arch/powerpc/include/asm/opal-api.h
index 0e2e57b..078ce77 100644
--- a/arch/powerpc/include/asm/opal-api.h
+++ b/arch/powerpc/include/asm/opal-api.h
@@ -167,7 +167,8 @@ 
 #define OPAL_INT_EOI				124
 #define OPAL_INT_SET_MFRR			125
 #define OPAL_PCI_TCE_KILL			126
-#define OPAL_LAST				126
+#define OPAL_PCI_GET_PHB_CAPI_MODE		128
+#define OPAL_LAST				128
 
 /* Device tree flags */
 
diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h
index ee05bd2..501d32a 100644
--- a/arch/powerpc/include/asm/opal.h
+++ b/arch/powerpc/include/asm/opal.h
@@ -228,6 +228,7 @@  int64_t opal_pci_tce_kill(uint64_t phb_id, uint32_t kill_type,
 int64_t opal_rm_pci_tce_kill(uint64_t phb_id, uint32_t kill_type,
 			     uint32_t pe_num, uint32_t tce_size,
 			     uint64_t dma_addr, uint32_t npages);
+int64_t opal_pci_get_phb_capi_mode(uint64_t phb_id);
 
 /* Internal functions */
 extern int early_init_dt_scan_opal(unsigned long node, const char *uname,
diff --git a/arch/powerpc/platforms/powernv/opal-wrappers.S b/arch/powerpc/platforms/powernv/opal-wrappers.S
index 3d29d40..338d034 100644
--- a/arch/powerpc/platforms/powernv/opal-wrappers.S
+++ b/arch/powerpc/platforms/powernv/opal-wrappers.S
@@ -308,3 +308,4 @@  OPAL_CALL(opal_int_eoi,				OPAL_INT_EOI);
 OPAL_CALL(opal_int_set_mfrr,			OPAL_INT_SET_MFRR);
 OPAL_CALL(opal_pci_tce_kill,			OPAL_PCI_TCE_KILL);
 OPAL_CALL_REAL(opal_rm_pci_tce_kill,		OPAL_PCI_TCE_KILL);
+OPAL_CALL(opal_pci_get_phb_capi_mode,		OPAL_PCI_GET_PHB_CAPI_MODE);