From: Brian King <brking@linux•vnet.ibm.com>
To: paulus@samba•org
Cc: brking@linux•vnet.ibm.com, linuxppc-dev@ozlabs•org,
thlin@linux•vnet.ibm.com
Subject: [PATCH 1/1] powerpc: Add powerpc PCI-E reset API implementation
Date: Fri, 06 Apr 2007 16:40:40 -0500 [thread overview]
Message-ID: <11758956393793-patch-mail.ibm.com> (raw)
Adds the pSeries platform implementation for a new PCI API
which can be used to issue various types of PCI-E reset,
including PCI-E warm reset and PCI-E hot reset. This is needed
for an ipr PCI-E adapter which does not properly implement BIST.
Running BIST on this adapter results in PCI-E errors. The only
reliable reset mechanism that exists on this hardware is PCI
Fundamental reset (warm reset).
Signed-off-by: Brian King <brking@linux•vnet.ibm.com>
---
Paul,
This patch requires a generic PCI layer patch, which is in Greg's
queue for 2.6.22, so do NOT apply this yet. Once the PCI change goes
in, I will resend this patch.
This is an update in response to the comments Linas Vepstas had.
Thanks,
Brian
---
linux-2.6-bjking1/arch/powerpc/platforms/pseries/eeh.c | 30 +++++++++++++++++
1 files changed, 30 insertions(+)
diff -puN arch/powerpc/platforms/pseries/eeh.c~powerpc_slot_reset_api3 arch/powerpc/platforms/pseries/eeh.c
--- linux-2.6/arch/powerpc/platforms/pseries/eeh.c~powerpc_slot_reset_api3 2007-04-06 15:39:12.000000000 -0500
+++ linux-2.6-bjking1/arch/powerpc/platforms/pseries/eeh.c 2007-04-06 15:40:29.000000000 -0500
@@ -561,6 +561,36 @@ rtas_pci_slot_reset(struct pci_dn *pdn,
}
/**
+ * pcibios_set_pcie_slot_reset - Set PCI-E reset state
+ * @dev: pci device struct
+ * @state: reset state to enter
+ *
+ * Return value:
+ * 0 if success
+ **/
+int pcibios_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state)
+{
+ struct device_node *dn = pci_device_to_OF_node(dev);
+ struct pci_dn *pdn = PCI_DN(dn);
+
+ switch (state) {
+ case pcie_deassert_reset:
+ rtas_pci_slot_reset(pdn, 0);
+ break;
+ case pcie_hot_reset:
+ rtas_pci_slot_reset(pdn, 1);
+ break;
+ case pcie_warm_reset:
+ rtas_pci_slot_reset(pdn, 3);
+ break;
+ default:
+ return -EINVAL;
+ };
+
+ return 0;
+}
+
+/**
* rtas_set_slot_reset -- assert the pci #RST line for 1/4 second
* @pdn: pci device node to be reset.
*
_
next reply other threads:[~2007-04-06 21:40 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-06 21:40 Brian King [this message]
2007-04-09 21:22 ` [PATCH 1/1] powerpc: Add powerpc PCI-E reset API implementation Linas Vepstas
-- strict thread matches above, loose matches on Subject: below --
2007-05-07 22:04 Brian King
2007-04-06 14:07 Brian King
2007-04-06 18:52 ` Linas Vepstas
2007-04-06 19:19 ` Brian King
2007-04-06 20:30 ` Linas Vepstas
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