From patchwork Tue Feb 7 07:17:04 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexey Kardashevskiy X-Patchwork-Id: 724961 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3vHbRp2Z9Hz9s7p for ; Tue, 7 Feb 2017 18:23:50 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752323AbdBGHXs (ORCPT ); Tue, 7 Feb 2017 02:23:48 -0500 Received: from ozlabs.ru ([83.169.36.222]:39666 "EHLO ozlabs.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751524AbdBGHXs (ORCPT ); Tue, 7 Feb 2017 02:23:48 -0500 Received: from vpl2.ozlabs.ibm.com (localhost [IPv6:::1]) by ozlabs.ru (Postfix) with ESMTP id 3DA62120E37; Tue, 7 Feb 2017 08:17:24 +0100 (CET) From: Alexey Kardashevskiy To: linuxppc-dev@lists.ozlabs.org Cc: Alexey Kardashevskiy , Alex Williamson , David Gibson , Paul Mackerras , kvm-ppc@vger.kernel.org, kvm@vger.kernel.org Subject: [PATCH kernel v4 03/10] powerpc/iommu/vfio_spapr_tce: Cleanup iommu_table disposal Date: Tue, 7 Feb 2017 18:17:04 +1100 Message-Id: <20170207071711.28938-4-aik@ozlabs.ru> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170207071711.28938-1-aik@ozlabs.ru> References: <20170207071711.28938-1-aik@ozlabs.ru> Sender: kvm-ppc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm-ppc@vger.kernel.org At the moment iommu_table can be disposed by either calling iommu_table_free() directly or it_ops::free(); the only implementation of free() is in IODA2 - pnv_ioda2_table_free() - and it calls iommu_table_free() anyway. As we are going to have reference counting on tables, we need an unified way of disposing tables. This moves it_ops::free() call into iommu_free_table() and makes use of the latter. The free() callback now handles only platform-specific data. This should cause no behavioral change. Signed-off-by: Alexey Kardashevskiy Reviewed-by: David Gibson --- arch/powerpc/kernel/iommu.c | 4 ++++ arch/powerpc/platforms/powernv/pci-ioda.c | 6 ++---- drivers/vfio/vfio_iommu_spapr_tce.c | 2 +- 3 files changed, 7 insertions(+), 5 deletions(-) diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c index 9bace5df05d5..bc142d87130f 100644 --- a/arch/powerpc/kernel/iommu.c +++ b/arch/powerpc/kernel/iommu.c @@ -719,6 +719,9 @@ void iommu_free_table(struct iommu_table *tbl, const char *node_name) if (!tbl) return; + if (tbl->it_ops->free) + tbl->it_ops->free(tbl); + if (!tbl->it_map) { kfree(tbl); return; @@ -745,6 +748,7 @@ void iommu_free_table(struct iommu_table *tbl, const char *node_name) /* free table */ kfree(tbl); } +EXPORT_SYMBOL_GPL(iommu_free_table); /* Creates TCEs for a user provided buffer. The user buffer must be * contiguous real kernel storage (not vmalloc). The address passed here diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index 1c2826fa812e..cf0d8aed652a 100644 --- a/arch/powerpc/platforms/powernv/pci-ioda.c +++ b/arch/powerpc/platforms/powernv/pci-ioda.c @@ -1422,7 +1422,6 @@ static void pnv_pci_ioda2_release_dma_pe(struct pci_dev *dev, struct pnv_ioda_pe iommu_group_put(pe->table_group.group); BUG_ON(pe->table_group.group); } - pnv_pci_ioda2_table_free_pages(tbl); iommu_free_table(tbl, of_node_full_name(dev->dev.of_node)); } @@ -2036,7 +2035,6 @@ static void pnv_ioda2_tce_free(struct iommu_table *tbl, long index, static void pnv_ioda2_table_free(struct iommu_table *tbl) { pnv_pci_ioda2_table_free_pages(tbl); - iommu_free_table(tbl, "pnv"); } static struct iommu_table_ops pnv_ioda2_iommu_ops = { @@ -2363,7 +2361,7 @@ static long pnv_pci_ioda2_setup_default_config(struct pnv_ioda_pe *pe) if (rc) { pe_err(pe, "Failed to configure 32-bit TCE table, err %ld\n", rc); - pnv_ioda2_table_free(tbl); + iommu_free_table(tbl, ""); return rc; } @@ -2449,7 +2447,7 @@ static void pnv_ioda2_take_ownership(struct iommu_table_group *table_group) pnv_pci_ioda2_set_bypass(pe, false); pnv_pci_ioda2_unset_window(&pe->table_group, 0); - pnv_ioda2_table_free(tbl); + iommu_free_table(tbl, "pnv"); } static void pnv_ioda2_release_ownership(struct iommu_table_group *table_group) diff --git a/drivers/vfio/vfio_iommu_spapr_tce.c b/drivers/vfio/vfio_iommu_spapr_tce.c index 14c62a8495a2..6e79be9dfb43 100644 --- a/drivers/vfio/vfio_iommu_spapr_tce.c +++ b/drivers/vfio/vfio_iommu_spapr_tce.c @@ -677,7 +677,7 @@ static void tce_iommu_free_table(struct tce_container *container, unsigned long pages = tbl->it_allocated_size >> PAGE_SHIFT; tce_iommu_userspace_view_free(tbl, container->mm); - tbl->it_ops->free(tbl); + iommu_free_table(tbl, ""); decrement_locked_vm(container->mm, pages); }