From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e31.co.us.ibm.com (e31.co.us.ibm.com [32.97.110.149]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "e31.co.us.ibm.com", Issuer "Equifax" (verified OK)) by ozlabs.org (Postfix) with ESMTP id ED225DDE25 for ; Sat, 7 Apr 2007 07:40:45 +1000 (EST) Received: from d03relay02.boulder.ibm.com (d03relay02.boulder.ibm.com [9.17.195.227]) by e31.co.us.ibm.com (8.13.8/8.13.8) with ESMTP id l36Legb0024802 for ; Fri, 6 Apr 2007 17:40:42 -0400 Received: from d03av01.boulder.ibm.com (d03av01.boulder.ibm.com [9.17.195.167]) by d03relay02.boulder.ibm.com (8.13.8/8.13.8/NCO v8.3) with ESMTP id l36Leg2J161464 for ; Fri, 6 Apr 2007 15:40:42 -0600 Received: from d03av01.boulder.ibm.com (loopback [127.0.0.1]) by d03av01.boulder.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id l36Lef7S029853 for ; Fri, 6 Apr 2007 15:40:42 -0600 Subject: [PATCH 1/1] powerpc: Add powerpc PCI-E reset API implementation To: paulus@samba.org From: Brian King Date: Fri, 06 Apr 2007 16:40:40 -0500 Message-Id: <11758956393793-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. 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. * _