From patchwork Tue Feb 18 07:36:46 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexey Kardashevskiy X-Patchwork-Id: 1239793 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 48MCW437BZz9sRf for ; Tue, 18 Feb 2020 18:42:40 +1100 (AEDT) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=ozlabs.ru Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 48MCW40n1DzDqW6 for ; Tue, 18 Feb 2020 18:42:40 +1100 (AEDT) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=ozlabs.ru (client-ip=107.174.27.60; helo=ozlabs.ru; envelope-from=aik@ozlabs.ru; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=ozlabs.ru Received: from ozlabs.ru (unknown [107.174.27.60]) by lists.ozlabs.org (Postfix) with ESMTP id 48MCP31vFmzDqNS for ; Tue, 18 Feb 2020 18:37:27 +1100 (AEDT) Received: from fstn1-p1.ozlabs.ibm.com (localhost [IPv6:::1]) by ozlabs.ru (Postfix) with ESMTP id A983CAE80022; Tue, 18 Feb 2020 02:35:22 -0500 (EST) From: Alexey Kardashevskiy To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH kernel 1/5] powerpc/powernv/ioda: Move TCE bypass base to PE Date: Tue, 18 Feb 2020 18:36:46 +1100 Message-Id: <20200218073650.16149-2-aik@ozlabs.ru> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200218073650.16149-1-aik@ozlabs.ru> References: <20200218073650.16149-1-aik@ozlabs.ru> X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Alexey Kardashevskiy , Alistair Popple , Alex Williamson , kvm-ppc@vger.kernel.org, David Gibson Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" We are about to allow another location for the second DMA window and we will need to advertise it outside of the powernv platform code. This moves bypass base address to iommu_table_group so drivers such as VFIO SPAPR TCE can see it. Signed-off-by: Alexey Kardashevskiy --- arch/powerpc/include/asm/iommu.h | 1 + arch/powerpc/platforms/powernv/pci.h | 1 - arch/powerpc/platforms/powernv/npu-dma.c | 1 + arch/powerpc/platforms/powernv/pci-ioda.c | 26 ++++++++++------------- 4 files changed, 13 insertions(+), 16 deletions(-) diff --git a/arch/powerpc/include/asm/iommu.h b/arch/powerpc/include/asm/iommu.h index 350101e11ddb..479439ef003e 100644 --- a/arch/powerpc/include/asm/iommu.h +++ b/arch/powerpc/include/asm/iommu.h @@ -194,6 +194,7 @@ struct iommu_table_group { __u64 pgsizes; /* Bitmap of supported page sizes */ __u32 max_dynamic_windows_supported; __u32 max_levels; + __u64 tce64_start; struct iommu_group *group; struct iommu_table *tables[IOMMU_TABLE_GROUP_MAX_TABLES]; diff --git a/arch/powerpc/platforms/powernv/pci.h b/arch/powerpc/platforms/powernv/pci.h index d3bbdeab3a32..a808dd396522 100644 --- a/arch/powerpc/platforms/powernv/pci.h +++ b/arch/powerpc/platforms/powernv/pci.h @@ -67,7 +67,6 @@ struct pnv_ioda_pe { /* 64-bit TCE bypass region */ bool tce_bypass_enabled; - uint64_t tce_bypass_base; /* MSIs. MVE index is identical for for 32 and 64 bit MSI * and -1 if not supported. (It's actually identical to the diff --git a/arch/powerpc/platforms/powernv/npu-dma.c b/arch/powerpc/platforms/powernv/npu-dma.c index b95b9e3c4c98..97a479848003 100644 --- a/arch/powerpc/platforms/powernv/npu-dma.c +++ b/arch/powerpc/platforms/powernv/npu-dma.c @@ -469,6 +469,7 @@ struct iommu_table_group *pnv_try_setup_npu_table_group(struct pnv_ioda_pe *pe) table_group->tce32_start = pe->table_group.tce32_start; table_group->tce32_size = pe->table_group.tce32_size; table_group->max_levels = pe->table_group.max_levels; + table_group->tce64_start = pe->table_group.tce64_start; if (!table_group->pgsizes) table_group->pgsizes = pe->table_group.pgsizes; diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index 22c22cd7bd82..52db10ab4fef 100644 --- a/arch/powerpc/platforms/powernv/pci-ioda.c +++ b/arch/powerpc/platforms/powernv/pci-ioda.c @@ -1777,7 +1777,7 @@ static void pnv_pci_ioda_dma_dev_setup(struct pci_dev *pdev) pe = &phb->ioda.pe_array[pdn->pe_number]; WARN_ON(get_dma_ops(&pdev->dev) != &dma_iommu_ops); - pdev->dev.archdata.dma_offset = pe->tce_bypass_base; + pdev->dev.archdata.dma_offset = pe->table_group.tce64_start; set_iommu_table_base(&pdev->dev, pe->table_group.tables[0]); /* * Note: iommu_add_device() will fail here as @@ -1869,7 +1869,8 @@ static bool pnv_pci_ioda_iommu_bypass_supported(struct pci_dev *pdev, pe = &phb->ioda.pe_array[pdn->pe_number]; if (pe->tce_bypass_enabled) { - u64 top = pe->tce_bypass_base + memblock_end_of_DRAM() - 1; + u64 top = pe->table_group.tce64_start + + memblock_end_of_DRAM() - 1; if (dma_mask >= top) return true; } @@ -1903,7 +1904,7 @@ static void pnv_ioda_setup_bus_dma(struct pnv_ioda_pe *pe, struct pci_bus *bus) list_for_each_entry(dev, &bus->devices, bus_list) { set_iommu_table_base(&dev->dev, pe->table_group.tables[0]); - dev->dev.archdata.dma_offset = pe->tce_bypass_base; + dev->dev.archdata.dma_offset = pe->table_group.tce64_start; if ((pe->flags & PNV_IODA_PE_BUS_ALL) && dev->subordinate) pnv_ioda_setup_bus_dma(pe, dev->subordinate); @@ -2361,16 +2362,12 @@ static void pnv_pci_ioda2_set_bypass(struct pnv_ioda_pe *pe, bool enable) top = roundup_pow_of_two(top); rc = opal_pci_map_pe_dma_window_real(pe->phb->opal_id, - pe->pe_number, - window_id, - pe->tce_bypass_base, - top); + pe->pe_number, window_id, + pe->table_group.tce64_start, top); } else { rc = opal_pci_map_pe_dma_window_real(pe->phb->opal_id, - pe->pe_number, - window_id, - pe->tce_bypass_base, - 0); + pe->pe_number, window_id, + pe->table_group.tce64_start, 0); } if (rc) pe_err(pe, "OPAL error %lld configuring bypass window\n", rc); @@ -2385,7 +2382,8 @@ static long pnv_pci_ioda2_create_table(struct iommu_table_group *table_group, struct pnv_ioda_pe *pe = container_of(table_group, struct pnv_ioda_pe, table_group); int nid = pe->phb->hose->node; - __u64 bus_offset = num ? pe->tce_bypass_base : table_group->tce32_start; + __u64 bus_offset = num ? + pe->table_group.tce64_start : table_group->tce32_start; long ret; struct iommu_table *tbl; @@ -2735,9 +2733,6 @@ static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb, if (!pnv_pci_ioda_pe_dma_weight(pe)) return; - /* TVE #1 is selected by PCI address bit 59 */ - pe->tce_bypass_base = 1ull << 59; - /* The PE will reserve all possible 32-bits space */ pe_info(pe, "Setting up 32-bit TCE table at 0..%08x\n", phb->ioda.m32_pci_base); @@ -2745,6 +2740,7 @@ static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb, /* Setup linux iommu table */ pe->table_group.tce32_start = 0; pe->table_group.tce32_size = phb->ioda.m32_pci_base; + pe->table_group.tce64_start = 1UL << 59; pe->table_group.max_dynamic_windows_supported = IOMMU_TABLE_GROUP_MAX_TABLES; pe->table_group.max_levels = POWERNV_IOMMU_MAX_LEVELS;