Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756570AbZKJNYz (ORCPT ); Tue, 10 Nov 2009 08:24:55 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756381AbZKJNYy (ORCPT ); Tue, 10 Nov 2009 08:24:54 -0500 Received: from hera.kernel.org ([140.211.167.34]:34210 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751228AbZKJNYw (ORCPT ); Tue, 10 Nov 2009 08:24:52 -0500 Date: Tue, 10 Nov 2009 13:24:08 GMT From: tip-bot for FUJITA Tomonori Cc: linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@redhat.com, fujita.tomonori@lab.ntt.co.jp, tglx@linutronix.de, mingo@elte.hu Reply-To: mingo@redhat.com, hpa@zytor.com, linux-kernel@vger.kernel.org, fujita.tomonori@lab.ntt.co.jp, tglx@linutronix.de, mingo@elte.hu In-Reply-To: <1257849980-22640-8-git-send-email-fujita.tomonori@lab.ntt.co.jp> References: <1257849980-22640-8-git-send-email-fujita.tomonori@lab.ntt.co.jp> To: linux-tip-commits@vger.kernel.org Subject: [tip:core/iommu] swiotlb: Add swiotlb_free() function Message-ID: Git-Commit-ID: 5740afdb68abadc473fd5392df733558a58c1254 X-Mailer: tip-git-log-daemon MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3272 Lines: 104 Commit-ID: 5740afdb68abadc473fd5392df733558a58c1254 Gitweb: http://git.kernel.org/tip/5740afdb68abadc473fd5392df733558a58c1254 Author: FUJITA Tomonori AuthorDate: Tue, 10 Nov 2009 19:46:18 +0900 Committer: Ingo Molnar CommitDate: Tue, 10 Nov 2009 12:31:52 +0100 swiotlb: Add swiotlb_free() function swiotlb_free() function frees all allocated memory for swiotlb. We need to initialize swiotlb before IOMMU initialization (x86 and powerpc needs to allocate memory from bootmem allocator). If IOMMU initialization is successful, we need to free swiotlb resource (don't want to waste 64MB). Signed-off-by: FUJITA Tomonori Cc: chrisw@sous-sol.org Cc: dwmw2@infradead.org Cc: joerg.roedel@amd.com Cc: muli@il.ibm.com LKML-Reference: <1257849980-22640-8-git-send-email-fujita.tomonori@lab.ntt.co.jp> [ -v2: build fix for the !CONFIG_SWIOTLB case ] Signed-off-by: Ingo Molnar --- include/linux/swiotlb.h | 6 ++++++ lib/swiotlb.c | 30 ++++++++++++++++++++++++++++++ 2 files changed, 36 insertions(+), 0 deletions(-) diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h index 73b1f1c..59bafa6 100644 --- a/include/linux/swiotlb.h +++ b/include/linux/swiotlb.h @@ -88,4 +88,10 @@ swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr); extern int swiotlb_dma_supported(struct device *hwdev, u64 mask); +#ifdef CONFIG_SWIOTLB +extern void __init swiotlb_free(void); +#else +static inline void swiotlb_free(void) { } +#endif + #endif /* __LINUX_SWIOTLB_H */ diff --git a/lib/swiotlb.c b/lib/swiotlb.c index ac25cd2..eee512b 100644 --- a/lib/swiotlb.c +++ b/lib/swiotlb.c @@ -97,6 +97,8 @@ static phys_addr_t *io_tlb_orig_addr; */ static DEFINE_SPINLOCK(io_tlb_lock); +static int late_alloc; + static int __init setup_io_tlb_npages(char *str) { @@ -262,6 +264,8 @@ swiotlb_late_init_with_default_size(size_t default_size) swiotlb_print_info(bytes); + late_alloc = 1; + return 0; cleanup4: @@ -281,6 +285,32 @@ cleanup1: return -ENOMEM; } +void __init swiotlb_free(void) +{ + if (!io_tlb_overflow_buffer) + return; + + if (late_alloc) { + free_pages((unsigned long)io_tlb_overflow_buffer, + get_order(io_tlb_overflow)); + free_pages((unsigned long)io_tlb_orig_addr, + get_order(io_tlb_nslabs * sizeof(phys_addr_t))); + free_pages((unsigned long)io_tlb_list, get_order(io_tlb_nslabs * + sizeof(int))); + free_pages((unsigned long)io_tlb_start, + get_order(io_tlb_nslabs << IO_TLB_SHIFT)); + } else { + free_bootmem_late(__pa(io_tlb_overflow_buffer), + io_tlb_overflow); + free_bootmem_late(__pa(io_tlb_orig_addr), + io_tlb_nslabs * sizeof(phys_addr_t)); + free_bootmem_late(__pa(io_tlb_list), + io_tlb_nslabs * sizeof(int)); + free_bootmem_late(__pa(io_tlb_start), + io_tlb_nslabs << IO_TLB_SHIFT); + } +} + static int is_swiotlb_buffer(phys_addr_t paddr) { return paddr >= virt_to_phys(io_tlb_start) && -- 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/