Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754434AbaACAIW (ORCPT ); Thu, 2 Jan 2014 19:08:22 -0500 Received: from aserp1040.oracle.com ([141.146.126.69]:22099 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754215AbaACAIO (ORCPT ); Thu, 2 Jan 2014 19:08:14 -0500 From: Yinghai Lu To: "H. Peter Anvin" , Tony Luck , Bjorn Helgaas , "Rafael J. Wysocki" , x86 Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, Yinghai Lu , David Woodhouse , Joerg Roedel , Donald Dutile , iommu@lists.linux-foundation.org Subject: [PATCH v2 07/10] IOMMU: Add init_dmar_one() Date: Thu, 2 Jan 2014 16:08:14 -0800 Message-Id: <1388707697-16800-8-git-send-email-yinghai@kernel.org> X-Mailer: git-send-email 1.8.4 In-Reply-To: <1388707697-16800-1-git-send-email-yinghai@kernel.org> References: <1388707697-16800-1-git-send-email-yinghai@kernel.org> X-Source-IP: acsinet21.oracle.com [141.146.126.237] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5663 Lines: 205 Will need that for hot added intel iommu Signed-off-by: Yinghai Lu Cc: David Woodhouse Cc: Joerg Roedel Cc: Donald Dutile Cc: iommu@lists.linux-foundation.org --- drivers/iommu/dmar.c | 4 +- drivers/iommu/intel-iommu.c | 122 ++++++++++++++++++++++++++++++++++++++++---- 2 files changed, 114 insertions(+), 12 deletions(-) diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c index 20e5727..78e75ad 100644 --- a/drivers/iommu/dmar.c +++ b/drivers/iommu/dmar.c @@ -64,7 +64,7 @@ static void __init dmar_register_drhd_unit(struct dmar_drhd_unit *drhd) list_add(&drhd->list, &dmar_drhd_units); } -static int __init dmar_parse_one_dev_scope(struct acpi_dmar_device_scope *scope, +static int dmar_parse_one_dev_scope(struct acpi_dmar_device_scope *scope, struct pci_dev **dev, u16 segment) { struct pci_bus *bus; @@ -115,7 +115,7 @@ static int __init dmar_parse_one_dev_scope(struct acpi_dmar_device_scope *scope, return 0; } -int __init dmar_parse_dev_scope(void *start, void *end, int *cnt, +int dmar_parse_dev_scope(void *start, void *end, int *cnt, struct pci_dev ***devices, u16 segment) { struct acpi_dmar_device_scope *scope; diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index c60d4ed..e52ce1c 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -2462,19 +2462,12 @@ static int __init init_dmars(void) * initialize and program root entry to not present * endfor */ - for_each_drhd_unit(drhd) { /* * lock not needed as this is only incremented in the single * threaded kernel __init code path all other access are read * only */ - if (g_num_of_iommus < IOMMU_UNITS_SUPPORTED) { - g_num_of_iommus++; - continue; - } - printk_once(KERN_ERR "intel-iommu: exceeded %d IOMMUs\n", - IOMMU_UNITS_SUPPORTED); - } + g_num_of_iommus = IOMMU_UNITS_SUPPORTED; g_iommus = kcalloc(g_num_of_iommus, sizeof(struct intel_iommu *), GFP_KERNEL); @@ -2675,6 +2668,108 @@ error: return ret; } +int init_dmar_one(struct dmar_drhd_unit *drhd) +{ + struct intel_iommu *iommu; + int ret; + + /* + * for each drhd + * allocate root + * initialize and program root entry to not present + * endfor + */ + + if (drhd->ignored) + return 0; + + iommu = drhd->iommu; + g_iommus[iommu->seq_id] = iommu; + + ret = iommu_init_domains(iommu); + if (ret) + goto error; + + /* + * TBD: + * we could share the same root & context tables + * among all IOMMU's. Need to Split it later. + */ + ret = iommu_alloc_root_entry(iommu); + if (ret) { + pr_err("IOMMU: allocate root entry failed\n"); + goto error; + } + + /* + * Start from the sane iommu hardware state. + */ + /* + * If the queued invalidation is already initialized by us + * (for example, while enabling interrupt-remapping) then + * we got the things already rolling from a sane state. + */ + if (!iommu->qi) { + /* + * Clear any previous faults. + */ + dmar_fault(-1, iommu); + /* + * Disable queued invalidation if supported and already enabled + * before OS handover. + */ + dmar_disable_qi(iommu); + } + + if (dmar_enable_qi(iommu)) { + /* + * Queued Invalidate not enabled, use Register Based + * Invalidate + */ + iommu->flush.flush_context = __iommu_flush_context; + iommu->flush.flush_iotlb = __iommu_flush_iotlb; + pr_info("IOMMU %d 0x%Lx: using Register based invalidation\n", + iommu->seq_id, (unsigned long long)drhd->reg_base_addr); + } else { + iommu->flush.flush_context = qi_flush_context; + iommu->flush.flush_iotlb = qi_flush_iotlb; + pr_info("IOMMU %d 0x%Lx: using Queued invalidation\n", + iommu->seq_id, (unsigned long long)drhd->reg_base_addr); + } + + /* + * for each drhd + * enable fault log + * global invalidate context cache + * global invalidate iotlb + * enable translation + */ + iommu_flush_write_buffer(iommu); + + ret = dmar_set_interrupt(iommu); + if (ret) + goto error; + + iommu_set_root_entry(iommu); + + iommu->flush.flush_context(iommu, 0, 0, 0, DMA_CCMD_GLOBAL_INVL); + iommu->flush.flush_iotlb(iommu, 0, 0, 0, DMA_TLB_GLOBAL_FLUSH); + + ret = iommu_enable_translation(iommu); + if (ret) + goto error; + + iommu_disable_protect_mem_regions(iommu); + + return 0; +error: + free_dmar_iommu(iommu); + free_iommu(iommu); + drhd->iommu = NULL; + return ret; +} + + /* This takes a number of _MM_ pages, not VTD pages */ static struct iova *intel_alloc_iova(struct device *dev, struct dmar_domain *domain, @@ -3530,7 +3625,8 @@ rmrr_parse_dev(struct dmar_rmrr_unit *rmrru) LIST_HEAD(dmar_atsr_units); -int __init dmar_parse_one_atsr(struct acpi_dmar_header *hdr) +int __dmar_parse_one_atsr(struct acpi_dmar_header *hdr, + struct dmar_atsr_unit **patsru) { struct acpi_dmar_atsr *atsr; struct dmar_atsr_unit *atsru; @@ -3545,11 +3641,17 @@ int __init dmar_parse_one_atsr(struct acpi_dmar_header *hdr) atsru->segment = atsr->segment; list_add(&atsru->list, &dmar_atsr_units); + if (patsru) + *patsru = atsru; return 0; } +int __init dmar_parse_one_atsr(struct acpi_dmar_header *hdr) +{ + return __dmar_parse_one_atsr(hdr, NULL); +} -static int __init atsr_parse_dev(struct dmar_atsr_unit *atsru) +int atsr_parse_dev(struct dmar_atsr_unit *atsru) { int rc; struct acpi_dmar_atsr *atsr; -- 1.8.4 -- 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/