Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755091AbbDJGei (ORCPT ); Fri, 10 Apr 2015 02:34:38 -0400 Received: from e23smtp07.au.ibm.com ([202.81.31.140]:58936 "EHLO e23smtp07.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754653AbbDJGdN (ORCPT ); Fri, 10 Apr 2015 02:33:13 -0400 From: Alexey Kardashevskiy To: linuxppc-dev@lists.ozlabs.org Cc: Alexey Kardashevskiy , Benjamin Herrenschmidt , Paul Mackerras , Alex Williamson , linux-kernel@vger.kernel.org Subject: [PATCH kernel v8 20/31] powerpc/powernv/ioda2: Introduce pnv_pci_ioda2_set_window Date: Fri, 10 Apr 2015 16:31:02 +1000 Message-Id: <1428647473-11738-21-git-send-email-aik@ozlabs.ru> X-Mailer: git-send-email 2.0.0 In-Reply-To: <1428647473-11738-1-git-send-email-aik@ozlabs.ru> References: <1428647473-11738-1-git-send-email-aik@ozlabs.ru> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15041006-0025-0000-0000-0000014AC0D8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4592 Lines: 138 This is a part of moving DMA window programming to an iommu_ops callback. This is a mechanical patch. Signed-off-by: Alexey Kardashevskiy --- arch/powerpc/platforms/powernv/pci-ioda.c | 85 ++++++++++++++++++++----------- 1 file changed, 56 insertions(+), 29 deletions(-) diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index 908863a..64b7cfe 100644 --- a/arch/powerpc/platforms/powernv/pci-ioda.c +++ b/arch/powerpc/platforms/powernv/pci-ioda.c @@ -1391,6 +1391,57 @@ static void pnv_pci_free_table(struct iommu_table *tbl) memset(tbl, 0, sizeof(struct iommu_table)); } +static long pnv_pci_ioda2_set_window(struct pnv_ioda_pe *pe, + struct iommu_table *tbl) +{ + struct pnv_phb *phb = pe->phb; + const __be64 *swinvp; + int64_t rc; + const __u64 start_addr = tbl->it_offset << tbl->it_page_shift; + const __u64 win_size = tbl->it_size << tbl->it_page_shift; + + pe_info(pe, "Setting up window at %llx..%llx pagesize=0x%x tablesize=0x%lx\n", + start_addr, start_addr + win_size - 1, + 1UL << tbl->it_page_shift, tbl->it_size << 3); + + pe->table_group.tables[0] = *tbl; + tbl = &pe->table_group.tables[0]; + tbl->it_group = &pe->table_group; + + /* + * Map TCE table through TVT. The TVE index is the PE number + * shifted by 1 bit for 32-bits DMA space. + */ + rc = opal_pci_map_pe_dma_window(phb->opal_id, pe->pe_number, + pe->pe_number << 1, 1, __pa(tbl->it_base), + tbl->it_size << 3, 1ULL << tbl->it_page_shift); + if (rc) { + pe_err(pe, "Failed to configure TCE table, err %ld\n", rc); + goto fail; + } + + /* OPAL variant of PHB3 invalidated TCEs */ + swinvp = of_get_property(phb->hose->dn, "ibm,opal-tce-kill", NULL); + if (swinvp) { + /* We need a couple more fields -- an address and a data + * to or. Since the bus is only printed out on table free + * errors, and on the first pass the data will be a relative + * bus number, print that out instead. + */ + pe->tce_inval_reg_phys = be64_to_cpup(swinvp); + tbl->it_index = (unsigned long)ioremap(pe->tce_inval_reg_phys, + 8); + tbl->it_type |= (TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE); + } + + return 0; +fail: + if (pe->tce32_seg >= 0) + pe->tce32_seg = -1; + + return rc; +} + static void pnv_pci_ioda2_set_bypass(struct pnv_ioda_pe *pe, bool enable) { uint16_t window_id = (pe->pe_number << 1 ) + 1; @@ -1463,7 +1514,6 @@ static struct iommu_table_group_ops pnv_pci_ioda2_ops = { static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb, struct pnv_ioda_pe *pe) { - const __be64 *swinvp; unsigned int end; struct iommu_table *tbl = &pe->table_group.tables[0]; int64_t rc; @@ -1493,31 +1543,14 @@ static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb, pe->table_group.ops = &pnv_pci_ioda2_ops; #endif - /* - * Map TCE table through TVT. The TVE index is the PE number - * shifted by 1 bit for 32-bits DMA space. - */ - rc = opal_pci_map_pe_dma_window(phb->opal_id, pe->pe_number, - pe->pe_number << 1, 1, __pa(tbl->it_base), - tbl->it_size << 3, 1ULL << tbl->it_page_shift); + rc = pnv_pci_ioda2_set_window(pe, tbl); if (rc) { pe_err(pe, "Failed to configure 32-bit TCE table," " err %ld\n", rc); - goto fail; - } - - /* OPAL variant of PHB3 invalidated TCEs */ - swinvp = of_get_property(phb->hose->dn, "ibm,opal-tce-kill", NULL); - if (swinvp) { - /* We need a couple more fields -- an address and a data - * to or. Since the bus is only printed out on table free - * errors, and on the first pass the data will be a relative - * bus number, print that out instead. - */ - pe->tce_inval_reg_phys = be64_to_cpup(swinvp); - tbl->it_index = (unsigned long)ioremap(pe->tce_inval_reg_phys, - 8); - tbl->it_type |= (TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE); + pnv_pci_free_table(tbl); + if (pe->tce32_seg >= 0) + pe->tce32_seg = -1; + return; } iommu_register_group(&pe->table_group, phb->hose->global_number, pe->pe_number); @@ -1531,12 +1564,6 @@ static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb, /* Also create a bypass window */ if (!pnv_iommu_bypass_disabled) pnv_pci_ioda2_setup_bypass_pe(phb, pe); - - return; -fail: - if (pe->tce32_seg >= 0) - pe->tce32_seg = -1; - pnv_pci_free_table(tbl); } static void pnv_ioda_setup_dma(struct pnv_phb *phb) -- 2.0.0 -- 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/