From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e5.ny.us.ibm.com (e5.ny.us.ibm.com [32.97.182.145]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "e5.ny.us.ibm.com", Issuer "Equifax" (verified OK)) by ozlabs.org (Postfix) with ESMTP id 2C4E3DDE49 for ; Sat, 7 Apr 2007 00:07:13 +1000 (EST) Received: from d01relay02.pok.ibm.com (d01relay02.pok.ibm.com [9.56.227.234]) by e5.ny.us.ibm.com (8.13.8/8.13.8) with ESMTP id l36E79OH014951 for ; Fri, 6 Apr 2007 10:07:09 -0400 Received: from d01av02.pok.ibm.com (d01av02.pok.ibm.com [9.56.224.216]) by d01relay02.pok.ibm.com (8.13.8/8.13.8/NCO v8.3) with ESMTP id l36E75Xr224314 for ; Fri, 6 Apr 2007 10:07:05 -0400 Received: from d01av02.pok.ibm.com (loopback [127.0.0.1]) by d01av02.pok.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id l36E756h007556 for ; Fri, 6 Apr 2007 10:07:05 -0400 Subject: [PATCH 1/1] powerpc: Add powerpc PCI-E reset API implementation To: paulus@samba.org From: Brian King Date: Fri, 06 Apr 2007 09:07:04 -0500 Message-Id: <11758684222896-patch-mail.ibm.com> Cc: brking@linux.vnet.ibm.com, linuxppc-dev@ozlabs.org, thlin@linux.vnet.ibm.com List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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 --- 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. 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 08:38:35.000000000 -0500 +++ linux-2.6-bjking1/arch/powerpc/platforms/pseries/eeh.c 2007-04-06 08:38:35.000000000 -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 pci_reset_normal: + rtas_pci_slot_reset(pdn, 0); + break; + case pci_reset_pcie_hot_reset: + rtas_pci_slot_reset(pdn, 1); + break; + case pci_reset_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. * _