From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e23smtp06.au.ibm.com (e23smtp06.au.ibm.com [202.81.31.148]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 522651A0D68 for ; Thu, 15 Jan 2015 13:28:36 +1100 (AEDT) Received: from /spool/local by e23smtp06.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 15 Jan 2015 12:28:36 +1000 Received: from d23relay09.au.ibm.com (d23relay09.au.ibm.com [9.185.63.181]) by d23dlp01.au.ibm.com (Postfix) with ESMTP id C65A82CE8052 for ; Thu, 15 Jan 2015 13:28:34 +1100 (EST) Received: from d23av01.au.ibm.com (d23av01.au.ibm.com [9.190.234.96]) by d23relay09.au.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id t0F2SY7J22347916 for ; Thu, 15 Jan 2015 13:28:34 +1100 Received: from d23av01.au.ibm.com (localhost [127.0.0.1]) by d23av01.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id t0F2SY95020081 for ; Thu, 15 Jan 2015 13:28:34 +1100 From: Wei Yang To: bhelgaas@google.com, benh@au1.ibm.com, gwshan@linux.vnet.ibm.com Subject: [PATCH V11 13/17] powerpc/powernv: Implement pcibios_iov_resource_alignment() on powernv Date: Thu, 15 Jan 2015 10:28:03 +0800 Message-Id: <1421288887-7765-14-git-send-email-weiyang@linux.vnet.ibm.com> In-Reply-To: <1421288887-7765-1-git-send-email-weiyang@linux.vnet.ibm.com> References: <20150113180502.GC2776@google.com> <1421288887-7765-1-git-send-email-weiyang@linux.vnet.ibm.com> Cc: linux-pci@vger.kernel.org, Wei Yang , linuxppc-dev@lists.ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , This patch implements the pcibios_iov_resource_alignment() on powernv platform. On PowerNV platform, there are 3 cases for the IOV BAR: 1. initial state, the IOV BAR size is multiple times of VF BAR size 2. after expanded, the IOV BAR size is expanded to meet the M64 segment size 3. sizing stage, the IOV BAR is truncated to 0 pnv_pci_iov_resource_alignment() handle these three cases respectively. Signed-off-by: Wei Yang --- arch/powerpc/include/asm/machdep.h | 3 +++ arch/powerpc/kernel/pci-common.c | 14 ++++++++++++++ arch/powerpc/platforms/powernv/pci-ioda.c | 20 ++++++++++++++++++++ 3 files changed, 37 insertions(+) diff --git a/arch/powerpc/include/asm/machdep.h b/arch/powerpc/include/asm/machdep.h index 965547c..12e8eb8 100644 --- a/arch/powerpc/include/asm/machdep.h +++ b/arch/powerpc/include/asm/machdep.h @@ -252,6 +252,9 @@ struct machdep_calls { #ifdef CONFIG_PCI_IOV void (*pcibios_fixup_sriov)(struct pci_bus *bus); + resource_size_t (*pcibios_iov_resource_alignment)(struct pci_dev *, + int resno, + resource_size_t align); #endif /* CONFIG_PCI_IOV */ /* Called to shutdown machine specific hardware not already controlled diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c index 832b7e1..8751dfb 100644 --- a/arch/powerpc/kernel/pci-common.c +++ b/arch/powerpc/kernel/pci-common.c @@ -130,6 +130,20 @@ void pcibios_reset_secondary_bus(struct pci_dev *dev) pci_reset_secondary_bus(dev); } +#ifdef CONFIG_PCI_IOV +resource_size_t pcibios_iov_resource_alignment(struct pci_dev *pdev, + int resno, + resource_size_t align) +{ + if (ppc_md.pcibios_iov_resource_alignment) + return ppc_md.pcibios_iov_resource_alignment(pdev, + resno, + align); + + return 0; +} +#endif /* CONFIG_PCI_IOV */ + static resource_size_t pcibios_io_size(const struct pci_controller *hose) { #ifdef CONFIG_PPC64 diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index 6704fdf..8bad2b0 100644 --- a/arch/powerpc/platforms/powernv/pci-ioda.c +++ b/arch/powerpc/platforms/powernv/pci-ioda.c @@ -1953,6 +1953,25 @@ static resource_size_t pnv_pci_window_alignment(struct pci_bus *bus, return phb->ioda.io_segsize; } +#ifdef CONFIG_PCI_IOV +static resource_size_t pnv_pci_iov_resource_alignment(struct pci_dev *pdev, + int resno, + resource_size_t align) +{ + struct pci_dn *pdn = pci_get_pdn(pdev); + resource_size_t iov_align; + + iov_align = resource_size(&pdev->resource[resno]); + if (iov_align) + return iov_align; + + if (pdn->max_vfs) + return pdn->max_vfs * align; + + return align; +} +#endif /* CONFIG_PCI_IOV */ + /* Prevent enabling devices for which we couldn't properly * assign a PE */ @@ -2155,6 +2174,7 @@ static void __init pnv_pci_init_ioda_phb(struct device_node *np, ppc_md.pcibios_reset_secondary_bus = pnv_pci_reset_secondary_bus; #ifdef CONFIG_PCI_IOV ppc_md.pcibios_fixup_sriov = pnv_pci_ioda_fixup_sriov; + ppc_md.pcibios_iov_resource_alignment = pnv_pci_iov_resource_alignment; #endif /* CONFIG_PCI_IOV */ pci_add_flags(PCI_REASSIGN_ALL_RSRC); -- 1.7.9.5