From: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
To: linuxppc-dev@lists.ozlabs.org
Cc: imunsie@au1.ibm.com, fbarrat@linux.vnet.ibm.com,
vaibhav@linux.vnet.ibm.com, benh@kernel.crashing.org,
gwshan@linux.vnet.ibm.com
Subject: [RFC 2/3] powerpc/powernv: add opal_pci_get_phb_capi_mode() call
Date: Fri, 16 Sep 2016 20:39:45 +1000 [thread overview]
Message-ID: <c1566d41802d5ebec3c9d5cbe7195f74c0877dca.1474022276.git-series.andrew.donnellan@au1.ibm.com> (raw)
In-Reply-To: <cover.303079d6fcc8cba76e4648314eee9a30def3d969.1474022276.git-series.andrew.donnellan@au1.ibm.com>
In-Reply-To: <cover.303079d6fcc8cba76e4648314eee9a30def3d969.1474022276.git-series.andrew.donnellan@au1.ibm.com>
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 --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);
--
git-series 0.8.10
next prev parent reply other threads:[~2016-09-16 10:40 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-16 10:39 [RFC 0/3] powerpc/powernv: support CAPI + kexec Andrew Donnellan
2016-09-16 10:39 ` [RFC 1/3] powerpc/powernv: fix comment style and spelling Andrew Donnellan
2016-09-25 3:00 ` [RFC,1/3] " Michael Ellerman
2016-09-16 10:39 ` Andrew Donnellan [this message]
2016-09-16 10:39 ` [RFC 3/3] powerpc/powernv: reset any PHBs in CAPI mode during initialisation Andrew Donnellan
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