From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753119AbYLCLvi (ORCPT ); Wed, 3 Dec 2008 06:51:38 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751214AbYLCLv3 (ORCPT ); Wed, 3 Dec 2008 06:51:29 -0500 Received: from outbound-dub.frontbridge.com ([213.199.154.16]:37790 "EHLO IE1EHSOBE001.bigfish.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751059AbYLCLv2 (ORCPT ); Wed, 3 Dec 2008 06:51:28 -0500 X-BigFish: VPS-19(z21eW5edJz4015Mzzzzz32i6bh43j61h) X-Spam-TCS-SCL: 0:0 X-WSS-ID: 0KBAU9H-04-7JA-01 Date: Wed, 3 Dec 2008 12:51:16 +0100 From: Joerg Roedel To: Ingo Molnar CC: iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org Subject: [GIT PULL] AMD IOMMU updates for 2.6.28-rc7 Message-ID: <20081203115116.GF12816@amd.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline User-Agent: mutt-ng/devel-r804 (Linux) X-OriginalArrivalTime: 03 Dec 2008 11:51:17.0230 (UTC) FILETIME=[734900E0:01C9553D] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Ingo, The following changes since commit 061e41fdb5047b1fb161e89664057835935ca1d2: Linus Torvalds (1): Linux 2.6.28-rc7 are available in the git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/joro/linux-2.6-iommu.git iommu-fixes-2.6.28 Joerg Roedel (2): AMD IOMMU: set device table entry for aliased devices AMD IOMMU: fix possible race while accessing iommu->need_sync Richard Kennedy (1): AMD IOMMU: struct amd_iommu remove padding on 64 bit arch/x86/include/asm/amd_iommu_types.h | 24 ++++++++++---------- arch/x86/kernel/amd_iommu.c | 36 ++++++++++++++----------------- 2 files changed, 28 insertions(+), 32 deletions(-) Beside the patch from Richard it contains a fix for a possible race condition and an fix necessary after a specification update. Find the full diff attached. Please pull. Thanks, Joerg diff --git a/arch/x86/include/asm/amd_iommu_types.h b/arch/x86/include/asm/amd_iommu_types.h index 1a30c04..ac302a2 100644 --- a/arch/x86/include/asm/amd_iommu_types.h +++ b/arch/x86/include/asm/amd_iommu_types.h @@ -251,13 +251,6 @@ struct amd_iommu { /* Pointer to PCI device of this IOMMU */ struct pci_dev *dev; - /* - * Capability pointer. There could be more than one IOMMU per PCI - * device function if there are more than one AMD IOMMU capability - * pointers. - */ - u16 cap_ptr; - /* physical address of MMIO space */ u64 mmio_phys; /* virtual address of MMIO space */ @@ -266,6 +259,13 @@ struct amd_iommu { /* capabilities of that IOMMU read from ACPI */ u32 cap; + /* + * Capability pointer. There could be more than one IOMMU per PCI + * device function if there are more than one AMD IOMMU capability + * pointers. + */ + u16 cap_ptr; + /* pci domain of this IOMMU */ u16 pci_seg; @@ -284,19 +284,19 @@ struct amd_iommu { /* size of command buffer */ u32 cmd_buf_size; - /* event buffer virtual address */ - u8 *evt_buf; /* size of event buffer */ u32 evt_buf_size; + /* event buffer virtual address */ + u8 *evt_buf; /* MSI number for event interrupt */ u16 evt_msi_num; - /* if one, we need to send a completion wait command */ - int need_sync; - /* true if interrupts for this IOMMU are already enabled */ bool int_enabled; + /* if one, we need to send a completion wait command */ + int need_sync; + /* default dma_ops domain for that IOMMU */ struct dma_ops_domain *default_dom; }; diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c index e4899e0..5662e22 100644 --- a/arch/x86/kernel/amd_iommu.c +++ b/arch/x86/kernel/amd_iommu.c @@ -187,6 +187,8 @@ static int iommu_queue_command(struct amd_iommu *iommu, struct iommu_cmd *cmd) spin_lock_irqsave(&iommu->lock, flags); ret = __iommu_queue_command(iommu, cmd); + if (!ret) + iommu->need_sync = 1; spin_unlock_irqrestore(&iommu->lock, flags); return ret; @@ -210,10 +212,13 @@ static int iommu_completion_wait(struct amd_iommu *iommu) cmd.data[0] = CMD_COMPL_WAIT_INT_MASK; CMD_SET_TYPE(&cmd, CMD_COMPL_WAIT); - iommu->need_sync = 0; - spin_lock_irqsave(&iommu->lock, flags); + if (!iommu->need_sync) + goto out; + + iommu->need_sync = 0; + ret = __iommu_queue_command(iommu, &cmd); if (ret) @@ -254,8 +259,6 @@ static int iommu_queue_inv_dev_entry(struct amd_iommu *iommu, u16 devid) ret = iommu_queue_command(iommu, &cmd); - iommu->need_sync = 1; - return ret; } @@ -281,8 +284,6 @@ static int iommu_queue_inv_iommu_pages(struct amd_iommu *iommu, ret = iommu_queue_command(iommu, &cmd); - iommu->need_sync = 1; - return ret; } @@ -762,8 +763,6 @@ static void set_device_domain(struct amd_iommu *iommu, write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); iommu_queue_inv_dev_entry(iommu, devid); - - iommu->need_sync = 1; } /***************************************************************************** @@ -858,6 +857,9 @@ static int get_device_resources(struct device *dev, print_devid(_bdf, 1); } + if (domain_for_device(_bdf) == NULL) + set_device_domain(*iommu, *domain, _bdf); + return 1; } @@ -1031,8 +1033,7 @@ static dma_addr_t map_single(struct device *dev, phys_addr_t paddr, if (addr == bad_dma_address) goto out; - if (unlikely(iommu->need_sync)) - iommu_completion_wait(iommu); + iommu_completion_wait(iommu); out: spin_unlock_irqrestore(&domain->lock, flags); @@ -1060,8 +1061,7 @@ static void unmap_single(struct device *dev, dma_addr_t dma_addr, __unmap_single(iommu, domain->priv, dma_addr, size, dir); - if (unlikely(iommu->need_sync)) - iommu_completion_wait(iommu); + iommu_completion_wait(iommu); spin_unlock_irqrestore(&domain->lock, flags); } @@ -1127,8 +1127,7 @@ static int map_sg(struct device *dev, struct scatterlist *sglist, goto unmap; } - if (unlikely(iommu->need_sync)) - iommu_completion_wait(iommu); + iommu_completion_wait(iommu); out: spin_unlock_irqrestore(&domain->lock, flags); @@ -1173,8 +1172,7 @@ static void unmap_sg(struct device *dev, struct scatterlist *sglist, s->dma_address = s->dma_length = 0; } - if (unlikely(iommu->need_sync)) - iommu_completion_wait(iommu); + iommu_completion_wait(iommu); spin_unlock_irqrestore(&domain->lock, flags); } @@ -1225,8 +1223,7 @@ static void *alloc_coherent(struct device *dev, size_t size, goto out; } - if (unlikely(iommu->need_sync)) - iommu_completion_wait(iommu); + iommu_completion_wait(iommu); out: spin_unlock_irqrestore(&domain->lock, flags); @@ -1257,8 +1254,7 @@ static void free_coherent(struct device *dev, size_t size, __unmap_single(iommu, domain->priv, dma_addr, size, DMA_BIDIRECTIONAL); - if (unlikely(iommu->need_sync)) - iommu_completion_wait(iommu); + iommu_completion_wait(iommu); spin_unlock_irqrestore(&domain->lock, flags); -- | AMD Saxony Limited Liability Company & Co. 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