Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754539AbbEKPkf (ORCPT ); Mon, 11 May 2015 11:40:35 -0400 Received: from e23smtp07.au.ibm.com ([202.81.31.140]:47941 "EHLO e23smtp07.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754465AbbEKPk2 (ORCPT ); Mon, 11 May 2015 11:40:28 -0400 From: Alexey Kardashevskiy To: linuxppc-dev@lists.ozlabs.org Cc: Alexey Kardashevskiy , David Gibson , Benjamin Herrenschmidt , Paul Mackerras , Alex Williamson , Gavin Shan , Wei Yang , linux-kernel@vger.kernel.org Subject: [PATCH kernel v10 03/34] powerpc/powernv/ioda: Clean up IOMMU group registration Date: Tue, 12 May 2015 01:38:52 +1000 Message-Id: <1431358763-24371-4-git-send-email-aik@ozlabs.ru> X-Mailer: git-send-email 2.4.0.rc3.8.gfb3e7d5 In-Reply-To: <1431358763-24371-1-git-send-email-aik@ozlabs.ru> References: <1431358763-24371-1-git-send-email-aik@ozlabs.ru> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15051115-0025-0000-0000-000001763D50 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4035 Lines: 109 The existing code has 3 calls to iommu_register_group() and all 3 branches actually cover all possible cases. This replaces 3 calls with one and moves the registration earlier; the latter will make more sense when we add TCE table sharing. Signed-off-by: Alexey Kardashevskiy --- arch/powerpc/platforms/powernv/pci-ioda.c | 28 ++++++++-------------------- 1 file changed, 8 insertions(+), 20 deletions(-) diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index 9a77f3c..8ca7abd 100644 --- a/arch/powerpc/platforms/powernv/pci-ioda.c +++ b/arch/powerpc/platforms/powernv/pci-ioda.c @@ -1784,6 +1784,9 @@ static void pnv_pci_ioda_setup_dma_pe(struct pnv_phb *phb, if (WARN_ON(pe->tce32_seg >= 0)) return; + tbl = pe->tce32_table; + iommu_register_group(tbl, phb->hose->global_number, pe->pe_number); + /* Grab a 32-bit TCE table */ pe->tce32_seg = base; pe_info(pe, " Setting up 32-bit TCE table at %08x..%08x\n", @@ -1818,7 +1821,6 @@ static void pnv_pci_ioda_setup_dma_pe(struct pnv_phb *phb, } /* Setup linux iommu table */ - tbl = pe->tce32_table; pnv_pci_setup_iommu_table(tbl, addr, TCE32_TABLE_SIZE * segs, base << 28, IOMMU_PAGE_SHIFT_4K); @@ -1840,8 +1842,6 @@ static void pnv_pci_ioda_setup_dma_pe(struct pnv_phb *phb, iommu_init_table(tbl, phb->hose->node); if (pe->flags & PNV_IODA_PE_DEV) { - iommu_register_group(tbl, phb->hose->global_number, - pe->pe_number); /* * Setting table base here only for carrying iommu_group * further down to let iommu_add_device() do the job. @@ -1849,14 +1849,8 @@ static void pnv_pci_ioda_setup_dma_pe(struct pnv_phb *phb, */ set_iommu_table_base(&pe->pdev->dev, tbl); iommu_add_device(&pe->pdev->dev); - } else if (pe->flags & (PNV_IODA_PE_BUS | PNV_IODA_PE_BUS_ALL)) { - iommu_register_group(tbl, phb->hose->global_number, - pe->pe_number); + } else if (pe->flags & (PNV_IODA_PE_BUS | PNV_IODA_PE_BUS_ALL)) pnv_ioda_setup_bus_dma(pe, pe->pbus); - } else if (pe->flags & PNV_IODA_PE_VF) { - iommu_register_group(tbl, phb->hose->global_number, - pe->pe_number); - } return; fail: @@ -1923,6 +1917,9 @@ static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb, if (WARN_ON(pe->tce32_seg >= 0)) return; + tbl = pe->tce32_table; + iommu_register_group(tbl, phb->hose->global_number, pe->pe_number); + /* The PE will reserve all possible 32-bits space */ pe->tce32_seg = 0; end = (1 << ilog2(phb->ioda.m32_pci_base)); @@ -1954,7 +1951,6 @@ static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb, } /* Setup linux iommu table */ - tbl = pe->tce32_table; pnv_pci_setup_iommu_table(tbl, addr, tce_table_size, 0, IOMMU_PAGE_SHIFT_4K); @@ -1974,8 +1970,6 @@ static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb, iommu_init_table(tbl, phb->hose->node); if (pe->flags & PNV_IODA_PE_DEV) { - iommu_register_group(tbl, phb->hose->global_number, - pe->pe_number); /* * Setting table base here only for carrying iommu_group * further down to let iommu_add_device() do the job. @@ -1983,14 +1977,8 @@ static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb, */ set_iommu_table_base(&pe->pdev->dev, tbl); iommu_add_device(&pe->pdev->dev); - } else if (pe->flags & (PNV_IODA_PE_BUS | PNV_IODA_PE_BUS_ALL)) { - iommu_register_group(tbl, phb->hose->global_number, - pe->pe_number); + } else if (pe->flags & (PNV_IODA_PE_BUS | PNV_IODA_PE_BUS_ALL)) pnv_ioda_setup_bus_dma(pe, pe->pbus); - } else if (pe->flags & PNV_IODA_PE_VF) { - iommu_register_group(tbl, phb->hose->global_number, - pe->pe_number); - } /* Also create a bypass window */ if (!pnv_iommu_bypass_disabled) -- 2.4.0.rc3.8.gfb3e7d5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/