Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762475AbYFZTdk (ORCPT ); Thu, 26 Jun 2008 15:33:40 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760790AbYFZT2s (ORCPT ); Thu, 26 Jun 2008 15:28:48 -0400 Received: from outbound-sin.frontbridge.com ([207.46.51.80]:30758 "EHLO SG2EHSOBE003.bigfish.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755777AbYFZT2r (ORCPT ); Thu, 26 Jun 2008 15:28:47 -0400 X-BigFish: VPS4(zzzz10d3izzz32i43j65h) X-Spam-TCS-SCL: 4:0 X-WSS-ID: 0K334QX-04-UNA-01 From: Joerg Roedel To: tglx@linutronix.de, mingo@redhat.com CC: linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, bhavna.sarathy@amd.com, Sebastian.Biemueller@amd.com, robert.richter@amd.com, joro@8bytes.org, Joerg Roedel Subject: [PATCH 13/34] AMD IOMMU: add functions to parse IOMMU memory mapping requirements for devices Date: Thu, 26 Jun 2008 21:27:49 +0200 Message-ID: <1214508490-29683-14-git-send-email-joerg.roedel@amd.com> X-Mailer: git-send-email 1.5.3.7 In-Reply-To: <1214508490-29683-1-git-send-email-joerg.roedel@amd.com> References: <1214508490-29683-1-git-send-email-joerg.roedel@amd.com> X-OriginalArrivalTime: 26 Jun 2008 19:28:11.0715 (UTC) FILETIME=[C57F7130:01C8D7C2] MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2735 Lines: 112 This patch adds the functions to parse the information about IOMMU exclusion ranges and required unity mappings for the devices handled by the IOMMU. Signed-off-by: Joerg Roedel --- arch/x86/kernel/amd_iommu_init.c | 87 ++++++++++++++++++++++++++++++++++++++ 1 files changed, 87 insertions(+), 0 deletions(-) diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c index 3f4f7b8..555fcc9 100644 --- a/arch/x86/kernel/amd_iommu_init.c +++ b/arch/x86/kernel/amd_iommu_init.c @@ -556,3 +556,90 @@ static int __init init_iommu_all(struct acpi_table_header *table) return 0; } +static void __init free_unity_maps(void) +{ + struct unity_map_entry *entry, *next; + + list_for_each_entry_safe(entry, next, &amd_iommu_unity_map, list) { + list_del(&entry->list); + kfree(entry); + } +} + +static int __init init_exclusion_range(struct ivmd_header *m) +{ + int i; + + switch (m->type) { + case ACPI_IVMD_TYPE: + set_device_exclusion_range(m->devid, m); + break; + case ACPI_IVMD_TYPE_ALL: + for (i = 0; i < amd_iommu_last_bdf; ++i) + set_device_exclusion_range(i, m); + break; + case ACPI_IVMD_TYPE_RANGE: + for (i = m->devid; i <= m->aux; ++i) + set_device_exclusion_range(i, m); + break; + default: + break; + } + + return 0; +} + +static int __init init_unity_map_range(struct ivmd_header *m) +{ + struct unity_map_entry *e = 0; + + e = kzalloc(sizeof(*e), GFP_KERNEL); + if (e == NULL) + return -ENOMEM; + + switch (m->type) { + default: + case ACPI_IVMD_TYPE: + e->devid_start = e->devid_end = m->devid; + break; + case ACPI_IVMD_TYPE_ALL: + e->devid_start = 0; + e->devid_end = amd_iommu_last_bdf; + break; + case ACPI_IVMD_TYPE_RANGE: + e->devid_start = m->devid; + e->devid_end = m->aux; + break; + } + e->address_start = PAGE_ALIGN(m->range_start); + e->address_end = e->address_start + PAGE_ALIGN(m->range_length); + e->prot = m->flags >> 1; + + list_add_tail(&e->list, &amd_iommu_unity_map); + + return 0; +} + +static int __init init_memory_definitions(struct acpi_table_header *table) +{ + u8 *p = (u8 *)table, *end = (u8 *)table; + struct ivmd_header *m; + + INIT_LIST_HEAD(&amd_iommu_unity_map); + + end += table->length; + p += IVRS_HEADER_LENGTH; + + while (p < end) { + m = (struct ivmd_header *)p; + if (m->flags & IVMD_FLAG_EXCL_RANGE) + init_exclusion_range(m); + else if (m->flags & IVMD_FLAG_UNITY_MAP) + init_unity_map_range(m); + + p += m->length; + } + + return 0; +} + -- 1.5.3.7 -- 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/