From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932653Ab2GKNrw (ORCPT ); Wed, 11 Jul 2012 09:47:52 -0400 Received: from ch1ehsobe001.messaging.microsoft.com ([216.32.181.181]:30265 "EHLO ch1outboundpool.messaging.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757715Ab2GKNjU (ORCPT ); Wed, 11 Jul 2012 09:39:20 -0400 X-Forefront-Antispam-Report: CIP:163.181.249.109;KIP:(null);UIP:(null);IPV:NLI;H:ausb3twp02.amd.com;RD:none;EFVD:NLI X-SpamScore: 0 X-BigFish: VPS0(zzzz1202hzz8275bhz2dh668h839hd24he5bhf0ah) X-WSS-ID: 0M700LD-02-1PB-02 X-M-MSG: From: Joerg Roedel To: CC: , Joerg Roedel Subject: [PATCH 14/27] iommu/amd: Allocate data structures to keep track of irq remapping tables Date: Wed, 11 Jul 2012 15:38:59 +0200 Message-ID: <1342013952-10174-15-git-send-email-joerg.roedel@amd.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1342013952-10174-1-git-send-email-joerg.roedel@amd.com> References: <1342013952-10174-1-git-send-email-joerg.roedel@amd.com> MIME-Version: 1.0 Content-Type: text/plain X-OriginatorOrg: amd.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org To easily map device ids to interrupt remapping table entries a new lookup table is necessary. Signed-off-by: Joerg Roedel --- drivers/iommu/amd_iommu_init.c | 16 ++++++++++++++++ drivers/iommu/amd_iommu_types.h | 9 +++++++++ 2 files changed, 25 insertions(+) diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index 49e72b9..473a51d 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -181,6 +181,12 @@ u16 *amd_iommu_alias_table; struct amd_iommu **amd_iommu_rlookup_table; /* + * This table is used to find the irq remapping table for a given device id + * quickly. + */ +struct irq_remap_table **irq_lookup_table; + +/* * AMD IOMMU allows up to 2^16 differend protection domains. This is a bitmap * to know which ones are already in use. */ @@ -1532,9 +1538,13 @@ static struct syscore_ops amd_iommu_syscore_ops = { static void __init free_on_init_error(void) { + free_pages((unsigned long)irq_lookup_table, + get_order(rlookup_table_size)); + if (amd_iommu_irq_cache) { kmem_cache_destroy(amd_iommu_irq_cache); amd_iommu_irq_cache = NULL; + } amd_iommu_uninit_devices(); @@ -1687,6 +1697,12 @@ static int __init early_amd_iommu_init(void) 0, NULL); if (!amd_iommu_irq_cache) goto out; + + irq_lookup_table = (void *)__get_free_pages( + GFP_KERNEL | __GFP_ZERO, + get_order(rlookup_table_size)); + if (!irq_lookup_table) + goto out; } ret = init_memory_definitions(ivrs_base); diff --git a/drivers/iommu/amd_iommu_types.h b/drivers/iommu/amd_iommu_types.h index 0e15e78..ceaa499 100644 --- a/drivers/iommu/amd_iommu_types.h +++ b/drivers/iommu/amd_iommu_types.h @@ -175,6 +175,7 @@ #define DEV_ENTRY_EX 0x67 #define DEV_ENTRY_SYSMGT1 0x68 #define DEV_ENTRY_SYSMGT2 0x69 +#define DEV_ENTRY_IRQ_TBL_EN 0x80 #define DEV_ENTRY_INIT_PASS 0xb8 #define DEV_ENTRY_EINT_PASS 0xb9 #define DEV_ENTRY_NMI_PASS 0xba @@ -337,6 +338,14 @@ extern bool amd_iommu_iotlb_sup; #define MAX_IRQS_PER_TABLE 256 #define IRQ_TABLE_ALIGNMENT 128 +struct irq_remap_table { + spinlock_t lock; + unsigned min_index; + u32 *table; +}; + +extern struct irq_remap_table **irq_lookup_table; + /* Interrupt remapping feature used? */ extern bool amd_iommu_irq_remap; -- 1.7.9.5