From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7696AC48BE5 for ; Tue, 22 Jun 2021 21:03:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 61A0261153 for ; Tue, 22 Jun 2021 21:03:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230232AbhFVVFU (ORCPT ); Tue, 22 Jun 2021 17:05:20 -0400 Received: from mail.kernel.org ([198.145.29.99]:45280 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230157AbhFVVFR (ORCPT ); Tue, 22 Jun 2021 17:05:17 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id B82596108E; Tue, 22 Jun 2021 21:02:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1624395780; bh=v96U5qnlOhDf3w1FKsu7SjrxREMp2X2HSv3JOsCkgmU=; h=Date:From:To:cc:Subject:In-Reply-To:References:From; b=jp86WFjWXckU//EExyz6NMfilYlNSGD/Sp+e74iycIMnJPnrnvb2f/IMZhcf30u/Y nZN/eIYPHlNFb7aaAK4BGrzQ8h60A0DeuaUctP8s9mDpf/LCXTiw3xhjYNzVwnhtzX TCr/gTHfn3WY41P/JfXANtN8uFlsPQPDxHmgwY0xOxtbMzYm2w8bezm6pQenS5mO9T QACOuqiKoEaVeTvNfrREoxgLiMZfrcQDhTBPBD0g1ngPW8KyWNjA64wNxxoLTDCtna okD7zfnO67pIIlP+aLcNDcQOeKWv20TpkQkk9C2UIZdw5p+0AdNoxQDYVfglebC4DR 9wbHzTawfV26w== Date: Tue, 22 Jun 2021 14:02:58 -0700 (PDT) From: Stefano Stabellini X-X-Sender: sstabellini@sstabellini-ThinkPad-T480s To: Claire Chang cc: Rob Herring , mpe@ellerman.id.au, Joerg Roedel , Will Deacon , Frank Rowand , Konrad Rzeszutek Wilk , boris.ostrovsky@oracle.com, jgross@suse.com, Christoph Hellwig , Marek Szyprowski , benh@kernel.crashing.org, paulus@samba.org, "list@263.net:IOMMU DRIVERS" , sstabellini@kernel.org, Robin Murphy , grant.likely@arm.com, xypron.glpk@gmx.de, Thierry Reding , mingo@kernel.org, bauerman@linux.ibm.com, peterz@infradead.org, Greg KH , Saravana Kannan , "Rafael J . Wysocki" , heikki.krogerus@linux.intel.com, Andy Shevchenko , Randy Dunlap , Dan Williams , Bartosz Golaszewski , linux-devicetree , lkml , linuxppc-dev@lists.ozlabs.org, xen-devel@lists.xenproject.org, Nicolas Boichat , Jim Quinlan , tfiga@chromium.org, bskeggs@redhat.com, bhelgaas@google.com, chris@chris-wilson.co.uk, daniel@ffwll.ch, airlied@linux.ie, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, jani.nikula@linux.intel.com, jxgao@google.com, joonas.lahtinen@linux.intel.com, linux-pci@vger.kernel.org, maarten.lankhorst@linux.intel.com, matthew.auld@intel.com, rodrigo.vivi@intel.com, thomas.hellstrom@linux.intel.com, thomas.lendacky@amd.com Subject: Re: [PATCH v14 01/12] swiotlb: Refactor swiotlb init functions In-Reply-To: <20210619034043.199220-2-tientzu@chromium.org> Message-ID: References: <20210619034043.199220-1-tientzu@chromium.org> <20210619034043.199220-2-tientzu@chromium.org> User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, 19 Jun 2021, Claire Chang wrote: > Add a new function, swiotlb_init_io_tlb_mem, for the io_tlb_mem struct > initialization to make the code reusable. > > Signed-off-by: Claire Chang > Reviewed-by: Christoph Hellwig > Tested-by: Stefano Stabellini > Tested-by: Will Deacon Acked-by: Stefano Stabellini > --- > kernel/dma/swiotlb.c | 50 ++++++++++++++++++++++---------------------- > 1 file changed, 25 insertions(+), 25 deletions(-) > > diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c > index 52e2ac526757..1f9b2b9e7490 100644 > --- a/kernel/dma/swiotlb.c > +++ b/kernel/dma/swiotlb.c > @@ -168,9 +168,28 @@ void __init swiotlb_update_mem_attributes(void) > memset(vaddr, 0, bytes); > } > > -int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose) > +static void swiotlb_init_io_tlb_mem(struct io_tlb_mem *mem, phys_addr_t start, > + unsigned long nslabs, bool late_alloc) > { > + void *vaddr = phys_to_virt(start); > unsigned long bytes = nslabs << IO_TLB_SHIFT, i; > + > + mem->nslabs = nslabs; > + mem->start = start; > + mem->end = mem->start + bytes; > + mem->index = 0; > + mem->late_alloc = late_alloc; > + spin_lock_init(&mem->lock); > + for (i = 0; i < mem->nslabs; i++) { > + mem->slots[i].list = IO_TLB_SEGSIZE - io_tlb_offset(i); > + mem->slots[i].orig_addr = INVALID_PHYS_ADDR; > + mem->slots[i].alloc_size = 0; > + } > + memset(vaddr, 0, bytes); > +} > + > +int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose) > +{ > struct io_tlb_mem *mem; > size_t alloc_size; > > @@ -186,16 +205,8 @@ int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose) > if (!mem) > panic("%s: Failed to allocate %zu bytes align=0x%lx\n", > __func__, alloc_size, PAGE_SIZE); > - mem->nslabs = nslabs; > - mem->start = __pa(tlb); > - mem->end = mem->start + bytes; > - mem->index = 0; > - spin_lock_init(&mem->lock); > - for (i = 0; i < mem->nslabs; i++) { > - mem->slots[i].list = IO_TLB_SEGSIZE - io_tlb_offset(i); > - mem->slots[i].orig_addr = INVALID_PHYS_ADDR; > - mem->slots[i].alloc_size = 0; > - } > + > + swiotlb_init_io_tlb_mem(mem, __pa(tlb), nslabs, false); > > io_tlb_default_mem = mem; > if (verbose) > @@ -282,8 +293,8 @@ swiotlb_late_init_with_default_size(size_t default_size) > int > swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs) > { > - unsigned long bytes = nslabs << IO_TLB_SHIFT, i; > struct io_tlb_mem *mem; > + unsigned long bytes = nslabs << IO_TLB_SHIFT; > > if (swiotlb_force == SWIOTLB_NO_FORCE) > return 0; > @@ -297,20 +308,9 @@ swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs) > if (!mem) > return -ENOMEM; > > - mem->nslabs = nslabs; > - mem->start = virt_to_phys(tlb); > - mem->end = mem->start + bytes; > - mem->index = 0; > - mem->late_alloc = 1; > - spin_lock_init(&mem->lock); > - for (i = 0; i < mem->nslabs; i++) { > - mem->slots[i].list = IO_TLB_SEGSIZE - io_tlb_offset(i); > - mem->slots[i].orig_addr = INVALID_PHYS_ADDR; > - mem->slots[i].alloc_size = 0; > - } > - > + memset(mem, 0, sizeof(*mem)); > set_memory_decrypted((unsigned long)tlb, bytes >> PAGE_SHIFT); > - memset(tlb, 0, bytes); > + swiotlb_init_io_tlb_mem(mem, virt_to_phys(tlb), nslabs, true); > > io_tlb_default_mem = mem; > swiotlb_print_info(); > -- > 2.32.0.288.g62a8d224e6-goog > From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.3 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 81987C2B9F4 for ; Tue, 22 Jun 2021 21:03:34 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id CFEF761001 for ; 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dkim-atps=neutral Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4G8f4T5SFVz2yxY for ; Wed, 23 Jun 2021 07:03:05 +1000 (AEST) Received: by mail.kernel.org (Postfix) with ESMTPSA id B82596108E; Tue, 22 Jun 2021 21:02:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1624395780; bh=v96U5qnlOhDf3w1FKsu7SjrxREMp2X2HSv3JOsCkgmU=; h=Date:From:To:cc:Subject:In-Reply-To:References:From; b=jp86WFjWXckU//EExyz6NMfilYlNSGD/Sp+e74iycIMnJPnrnvb2f/IMZhcf30u/Y nZN/eIYPHlNFb7aaAK4BGrzQ8h60A0DeuaUctP8s9mDpf/LCXTiw3xhjYNzVwnhtzX TCr/gTHfn3WY41P/JfXANtN8uFlsPQPDxHmgwY0xOxtbMzYm2w8bezm6pQenS5mO9T QACOuqiKoEaVeTvNfrREoxgLiMZfrcQDhTBPBD0g1ngPW8KyWNjA64wNxxoLTDCtna okD7zfnO67pIIlP+aLcNDcQOeKWv20TpkQkk9C2UIZdw5p+0AdNoxQDYVfglebC4DR 9wbHzTawfV26w== Date: Tue, 22 Jun 2021 14:02:58 -0700 (PDT) From: Stefano Stabellini X-X-Sender: sstabellini@sstabellini-ThinkPad-T480s To: Claire Chang Subject: Re: [PATCH v14 01/12] swiotlb: Refactor swiotlb init functions In-Reply-To: <20210619034043.199220-2-tientzu@chromium.org> Message-ID: References: <20210619034043.199220-1-tientzu@chromium.org> <20210619034043.199220-2-tientzu@chromium.org> User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: heikki.krogerus@linux.intel.com, thomas.hellstrom@linux.intel.com, peterz@infradead.org, joonas.lahtinen@linux.intel.com, dri-devel@lists.freedesktop.org, chris@chris-wilson.co.uk, grant.likely@arm.com, paulus@samba.org, Frank Rowand , mingo@kernel.org, Marek Szyprowski , sstabellini@kernel.org, Saravana Kannan , Joerg Roedel , "Rafael J . Wysocki" , Christoph Hellwig , Bartosz Golaszewski , bskeggs@redhat.com, linux-pci@vger.kernel.org, xen-devel@lists.xenproject.org, Thierry Reding , intel-gfx@lists.freedesktop.org, matthew.auld@intel.com, linux-devicetree , jxgao@google.com, daniel@ffwll.ch, Will Deacon , Konrad Rzeszutek Wilk , maarten.lankhorst@linux.intel.com, airlied@linux.ie, Dan Williams , linuxppc-dev@lists.ozlabs.org, jani.nikula@linux.intel.com, Rob Herring , rodrigo.vivi@intel.com, bhelgaas@google.com, boris.ostrovsky@oracle.com, Andy Shevchenko , jgross@suse.com, Nicolas Boichat , Greg KH , Randy Dunlap , lkml , tfiga@chromium.org, "list@263.net:IOMMU DRIVERS" , Jim Quinlan , xypron.glpk@gmx.de, thomas.lendacky@amd.com, Robin Murphy , bauerman@linux.ibm.com Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Sat, 19 Jun 2021, Claire Chang wrote: > Add a new function, swiotlb_init_io_tlb_mem, for the io_tlb_mem struct > initialization to make the code reusable. > > Signed-off-by: Claire Chang > Reviewed-by: Christoph Hellwig > Tested-by: Stefano Stabellini > Tested-by: Will Deacon Acked-by: Stefano Stabellini > --- > kernel/dma/swiotlb.c | 50 ++++++++++++++++++++++---------------------- > 1 file changed, 25 insertions(+), 25 deletions(-) > > diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c > index 52e2ac526757..1f9b2b9e7490 100644 > --- a/kernel/dma/swiotlb.c > +++ b/kernel/dma/swiotlb.c > @@ -168,9 +168,28 @@ void __init swiotlb_update_mem_attributes(void) > memset(vaddr, 0, bytes); > } > > -int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose) > +static void swiotlb_init_io_tlb_mem(struct io_tlb_mem *mem, phys_addr_t start, > + unsigned long nslabs, bool late_alloc) > { > + void *vaddr = phys_to_virt(start); > unsigned long bytes = nslabs << IO_TLB_SHIFT, i; > + > + mem->nslabs = nslabs; > + mem->start = start; > + mem->end = mem->start + bytes; > + mem->index = 0; > + mem->late_alloc = late_alloc; > + spin_lock_init(&mem->lock); > + for (i = 0; i < mem->nslabs; i++) { > + mem->slots[i].list = IO_TLB_SEGSIZE - io_tlb_offset(i); > + mem->slots[i].orig_addr = INVALID_PHYS_ADDR; > + mem->slots[i].alloc_size = 0; > + } > + memset(vaddr, 0, bytes); > +} > + > +int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose) > +{ > struct io_tlb_mem *mem; > size_t alloc_size; > > @@ -186,16 +205,8 @@ int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose) > if (!mem) > panic("%s: Failed to allocate %zu bytes align=0x%lx\n", > __func__, alloc_size, PAGE_SIZE); > - mem->nslabs = nslabs; > - mem->start = __pa(tlb); > - mem->end = mem->start + bytes; > - mem->index = 0; > - spin_lock_init(&mem->lock); > - for (i = 0; i < mem->nslabs; i++) { > - mem->slots[i].list = IO_TLB_SEGSIZE - io_tlb_offset(i); > - mem->slots[i].orig_addr = INVALID_PHYS_ADDR; > - mem->slots[i].alloc_size = 0; > - } > + > + swiotlb_init_io_tlb_mem(mem, __pa(tlb), nslabs, false); > > io_tlb_default_mem = mem; > if (verbose) > @@ -282,8 +293,8 @@ swiotlb_late_init_with_default_size(size_t default_size) > int > swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs) > { > - unsigned long bytes = nslabs << IO_TLB_SHIFT, i; > struct io_tlb_mem *mem; > + unsigned long bytes = nslabs << IO_TLB_SHIFT; > > if (swiotlb_force == SWIOTLB_NO_FORCE) > return 0; > @@ -297,20 +308,9 @@ swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs) > if (!mem) > return -ENOMEM; > > - mem->nslabs = nslabs; > - mem->start = virt_to_phys(tlb); > - mem->end = mem->start + bytes; > - mem->index = 0; > - mem->late_alloc = 1; > - spin_lock_init(&mem->lock); > - for (i = 0; i < mem->nslabs; i++) { > - mem->slots[i].list = IO_TLB_SEGSIZE - io_tlb_offset(i); > - mem->slots[i].orig_addr = INVALID_PHYS_ADDR; > - mem->slots[i].alloc_size = 0; > - } > - > + memset(mem, 0, sizeof(*mem)); > set_memory_decrypted((unsigned long)tlb, bytes >> PAGE_SHIFT); > - memset(tlb, 0, bytes); > + swiotlb_init_io_tlb_mem(mem, virt_to_phys(tlb), nslabs, true); > > io_tlb_default_mem = mem; > swiotlb_print_info(); > -- > 2.32.0.288.g62a8d224e6-goog > From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.3 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3F138C48BDF for ; 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Tue, 22 Jun 2021 21:03:01 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPSA id B82596108E; Tue, 22 Jun 2021 21:02:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1624395780; bh=v96U5qnlOhDf3w1FKsu7SjrxREMp2X2HSv3JOsCkgmU=; h=Date:From:To:cc:Subject:In-Reply-To:References:From; b=jp86WFjWXckU//EExyz6NMfilYlNSGD/Sp+e74iycIMnJPnrnvb2f/IMZhcf30u/Y nZN/eIYPHlNFb7aaAK4BGrzQ8h60A0DeuaUctP8s9mDpf/LCXTiw3xhjYNzVwnhtzX TCr/gTHfn3WY41P/JfXANtN8uFlsPQPDxHmgwY0xOxtbMzYm2w8bezm6pQenS5mO9T QACOuqiKoEaVeTvNfrREoxgLiMZfrcQDhTBPBD0g1ngPW8KyWNjA64wNxxoLTDCtna okD7zfnO67pIIlP+aLcNDcQOeKWv20TpkQkk9C2UIZdw5p+0AdNoxQDYVfglebC4DR 9wbHzTawfV26w== Date: Tue, 22 Jun 2021 14:02:58 -0700 (PDT) From: Stefano Stabellini X-X-Sender: sstabellini@sstabellini-ThinkPad-T480s To: Claire Chang Subject: Re: [PATCH v14 01/12] swiotlb: Refactor swiotlb init functions In-Reply-To: <20210619034043.199220-2-tientzu@chromium.org> Message-ID: References: <20210619034043.199220-1-tientzu@chromium.org> <20210619034043.199220-2-tientzu@chromium.org> User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 Cc: heikki.krogerus@linux.intel.com, thomas.hellstrom@linux.intel.com, peterz@infradead.org, benh@kernel.crashing.org, joonas.lahtinen@linux.intel.com, dri-devel@lists.freedesktop.org, chris@chris-wilson.co.uk, grant.likely@arm.com, paulus@samba.org, Frank Rowand , mingo@kernel.org, sstabellini@kernel.org, Saravana Kannan , mpe@ellerman.id.au, "Rafael J . Wysocki" , Christoph Hellwig , Bartosz Golaszewski , bskeggs@redhat.com, linux-pci@vger.kernel.org, xen-devel@lists.xenproject.org, Thierry Reding , intel-gfx@lists.freedesktop.org, matthew.auld@intel.com, linux-devicetree , jxgao@google.com, daniel@ffwll.ch, Will Deacon , Konrad Rzeszutek Wilk , maarten.lankhorst@linux.intel.com, airlied@linux.ie, Dan Williams , linuxppc-dev@lists.ozlabs.org, jani.nikula@linux.intel.com, Rob Herring , rodrigo.vivi@intel.com, bhelgaas@google.com, boris.ostrovsky@oracle.com, Andy Shevchenko , jgross@suse.com, Nicolas Boichat , Greg KH , Randy Dunlap , lkml , "list@263.net:IOMMU DRIVERS" , Jim Quinlan , xypron.glpk@gmx.de, thomas.lendacky@amd.com, Robin Murphy , bauerman@linux.ibm.com X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" On Sat, 19 Jun 2021, Claire Chang wrote: > Add a new function, swiotlb_init_io_tlb_mem, for the io_tlb_mem struct > initialization to make the code reusable. > > Signed-off-by: Claire Chang > Reviewed-by: Christoph Hellwig > Tested-by: Stefano Stabellini > Tested-by: Will Deacon Acked-by: Stefano Stabellini > --- > kernel/dma/swiotlb.c | 50 ++++++++++++++++++++++---------------------- > 1 file changed, 25 insertions(+), 25 deletions(-) > > diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c > index 52e2ac526757..1f9b2b9e7490 100644 > --- a/kernel/dma/swiotlb.c > +++ b/kernel/dma/swiotlb.c > @@ -168,9 +168,28 @@ void __init swiotlb_update_mem_attributes(void) > memset(vaddr, 0, bytes); > } > > -int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose) > +static void swiotlb_init_io_tlb_mem(struct io_tlb_mem *mem, phys_addr_t start, > + unsigned long nslabs, bool late_alloc) > { > + void *vaddr = phys_to_virt(start); > unsigned long bytes = nslabs << IO_TLB_SHIFT, i; > + > + mem->nslabs = nslabs; > + mem->start = start; > + mem->end = mem->start + bytes; > + mem->index = 0; > + mem->late_alloc = late_alloc; > + spin_lock_init(&mem->lock); > + for (i = 0; i < mem->nslabs; i++) { > + mem->slots[i].list = IO_TLB_SEGSIZE - io_tlb_offset(i); > + mem->slots[i].orig_addr = INVALID_PHYS_ADDR; > + mem->slots[i].alloc_size = 0; > + } > + memset(vaddr, 0, bytes); > +} > + > +int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose) > +{ > struct io_tlb_mem *mem; > size_t alloc_size; > > @@ -186,16 +205,8 @@ int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose) > if (!mem) > panic("%s: Failed to allocate %zu bytes align=0x%lx\n", > __func__, alloc_size, PAGE_SIZE); > - mem->nslabs = nslabs; > - mem->start = __pa(tlb); > - mem->end = mem->start + bytes; > - mem->index = 0; > - spin_lock_init(&mem->lock); > - for (i = 0; i < mem->nslabs; i++) { > - mem->slots[i].list = IO_TLB_SEGSIZE - io_tlb_offset(i); > - mem->slots[i].orig_addr = INVALID_PHYS_ADDR; > - mem->slots[i].alloc_size = 0; > - } > + > + swiotlb_init_io_tlb_mem(mem, __pa(tlb), nslabs, false); > > io_tlb_default_mem = mem; > if (verbose) > @@ -282,8 +293,8 @@ swiotlb_late_init_with_default_size(size_t default_size) > int > swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs) > { > - unsigned long bytes = nslabs << IO_TLB_SHIFT, i; > struct io_tlb_mem *mem; > + unsigned long bytes = nslabs << IO_TLB_SHIFT; > > if (swiotlb_force == SWIOTLB_NO_FORCE) > return 0; > @@ -297,20 +308,9 @@ swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs) > if (!mem) > return -ENOMEM; > > - mem->nslabs = nslabs; > - mem->start = virt_to_phys(tlb); > - mem->end = mem->start + bytes; > - mem->index = 0; > - mem->late_alloc = 1; > - spin_lock_init(&mem->lock); > - for (i = 0; i < mem->nslabs; i++) { > - mem->slots[i].list = IO_TLB_SEGSIZE - io_tlb_offset(i); > - mem->slots[i].orig_addr = INVALID_PHYS_ADDR; > - mem->slots[i].alloc_size = 0; > - } > - > + memset(mem, 0, sizeof(*mem)); > set_memory_decrypted((unsigned long)tlb, bytes >> PAGE_SHIFT); > - memset(tlb, 0, bytes); > + swiotlb_init_io_tlb_mem(mem, virt_to_phys(tlb), nslabs, true); > > io_tlb_default_mem = mem; > swiotlb_print_info(); > -- > 2.32.0.288.g62a8d224e6-goog > _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.3 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6DD82C48BE5 for ; Tue, 22 Jun 2021 21:03:03 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 3357A60FF4 for ; Tue, 22 Jun 2021 21:03:03 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3357A60FF4 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 76B296E0D7; Tue, 22 Jun 2021 21:03:02 +0000 (UTC) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by gabe.freedesktop.org (Postfix) with ESMTPS id 34A6D6E0D7; Tue, 22 Jun 2021 21:03:01 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPSA id B82596108E; Tue, 22 Jun 2021 21:02:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1624395780; bh=v96U5qnlOhDf3w1FKsu7SjrxREMp2X2HSv3JOsCkgmU=; h=Date:From:To:cc:Subject:In-Reply-To:References:From; b=jp86WFjWXckU//EExyz6NMfilYlNSGD/Sp+e74iycIMnJPnrnvb2f/IMZhcf30u/Y nZN/eIYPHlNFb7aaAK4BGrzQ8h60A0DeuaUctP8s9mDpf/LCXTiw3xhjYNzVwnhtzX TCr/gTHfn3WY41P/JfXANtN8uFlsPQPDxHmgwY0xOxtbMzYm2w8bezm6pQenS5mO9T QACOuqiKoEaVeTvNfrREoxgLiMZfrcQDhTBPBD0g1ngPW8KyWNjA64wNxxoLTDCtna okD7zfnO67pIIlP+aLcNDcQOeKWv20TpkQkk9C2UIZdw5p+0AdNoxQDYVfglebC4DR 9wbHzTawfV26w== Date: Tue, 22 Jun 2021 14:02:58 -0700 (PDT) From: Stefano Stabellini X-X-Sender: sstabellini@sstabellini-ThinkPad-T480s To: Claire Chang Subject: Re: [PATCH v14 01/12] swiotlb: Refactor swiotlb init functions In-Reply-To: <20210619034043.199220-2-tientzu@chromium.org> Message-ID: References: <20210619034043.199220-1-tientzu@chromium.org> <20210619034043.199220-2-tientzu@chromium.org> User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: heikki.krogerus@linux.intel.com, thomas.hellstrom@linux.intel.com, peterz@infradead.org, dri-devel@lists.freedesktop.org, chris@chris-wilson.co.uk, grant.likely@arm.com, paulus@samba.org, Frank Rowand , mingo@kernel.org, Marek Szyprowski , sstabellini@kernel.org, Saravana Kannan , mpe@ellerman.id.au, Joerg Roedel , "Rafael J . Wysocki" , Christoph Hellwig , Bartosz Golaszewski , bskeggs@redhat.com, linux-pci@vger.kernel.org, xen-devel@lists.xenproject.org, Thierry Reding , intel-gfx@lists.freedesktop.org, matthew.auld@intel.com, linux-devicetree , jxgao@google.com, Will Deacon , Konrad Rzeszutek Wilk , airlied@linux.ie, Dan Williams , linuxppc-dev@lists.ozlabs.org, Rob Herring , rodrigo.vivi@intel.com, bhelgaas@google.com, boris.ostrovsky@oracle.com, Andy Shevchenko , jgross@suse.com, Nicolas Boichat , Greg KH , Randy Dunlap , lkml , tfiga@chromium.org, "list@263.net:IOMMU DRIVERS" , Jim Quinlan , xypron.glpk@gmx.de, thomas.lendacky@amd.com, Robin Murphy , bauerman@linux.ibm.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On Sat, 19 Jun 2021, Claire Chang wrote: > Add a new function, swiotlb_init_io_tlb_mem, for the io_tlb_mem struct > initialization to make the code reusable. > > Signed-off-by: Claire Chang > Reviewed-by: Christoph Hellwig > Tested-by: Stefano Stabellini > Tested-by: Will Deacon Acked-by: Stefano Stabellini > --- > kernel/dma/swiotlb.c | 50 ++++++++++++++++++++++---------------------- > 1 file changed, 25 insertions(+), 25 deletions(-) > > diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c > index 52e2ac526757..1f9b2b9e7490 100644 > --- a/kernel/dma/swiotlb.c > +++ b/kernel/dma/swiotlb.c > @@ -168,9 +168,28 @@ void __init swiotlb_update_mem_attributes(void) > memset(vaddr, 0, bytes); > } > > -int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose) > +static void swiotlb_init_io_tlb_mem(struct io_tlb_mem *mem, phys_addr_t start, > + unsigned long nslabs, bool late_alloc) > { > + void *vaddr = phys_to_virt(start); > unsigned long bytes = nslabs << IO_TLB_SHIFT, i; > + > + mem->nslabs = nslabs; > + mem->start = start; > + mem->end = mem->start + bytes; > + mem->index = 0; > + mem->late_alloc = late_alloc; > + spin_lock_init(&mem->lock); > + for (i = 0; i < mem->nslabs; i++) { > + mem->slots[i].list = IO_TLB_SEGSIZE - io_tlb_offset(i); > + mem->slots[i].orig_addr = INVALID_PHYS_ADDR; > + mem->slots[i].alloc_size = 0; > + } > + memset(vaddr, 0, bytes); > +} > + > +int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose) > +{ > struct io_tlb_mem *mem; > size_t alloc_size; > > @@ -186,16 +205,8 @@ int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose) > if (!mem) > panic("%s: Failed to allocate %zu bytes align=0x%lx\n", > __func__, alloc_size, PAGE_SIZE); > - mem->nslabs = nslabs; > - mem->start = __pa(tlb); > - mem->end = mem->start + bytes; > - mem->index = 0; > - spin_lock_init(&mem->lock); > - for (i = 0; i < mem->nslabs; i++) { > - mem->slots[i].list = IO_TLB_SEGSIZE - io_tlb_offset(i); > - mem->slots[i].orig_addr = INVALID_PHYS_ADDR; > - mem->slots[i].alloc_size = 0; > - } > + > + swiotlb_init_io_tlb_mem(mem, __pa(tlb), nslabs, false); > > io_tlb_default_mem = mem; > if (verbose) > @@ -282,8 +293,8 @@ swiotlb_late_init_with_default_size(size_t default_size) > int > swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs) > { > - unsigned long bytes = nslabs << IO_TLB_SHIFT, i; > struct io_tlb_mem *mem; > + unsigned long bytes = nslabs << IO_TLB_SHIFT; > > if (swiotlb_force == SWIOTLB_NO_FORCE) > return 0; > @@ -297,20 +308,9 @@ swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs) > if (!mem) > return -ENOMEM; > > - mem->nslabs = nslabs; > - mem->start = virt_to_phys(tlb); > - mem->end = mem->start + bytes; > - mem->index = 0; > - mem->late_alloc = 1; > - spin_lock_init(&mem->lock); > - for (i = 0; i < mem->nslabs; i++) { > - mem->slots[i].list = IO_TLB_SEGSIZE - io_tlb_offset(i); > - mem->slots[i].orig_addr = INVALID_PHYS_ADDR; > - mem->slots[i].alloc_size = 0; > - } > - > + memset(mem, 0, sizeof(*mem)); > set_memory_decrypted((unsigned long)tlb, bytes >> PAGE_SHIFT); > - memset(tlb, 0, bytes); > + swiotlb_init_io_tlb_mem(mem, virt_to_phys(tlb), nslabs, true); > > io_tlb_default_mem = mem; > swiotlb_print_info(); > -- > 2.32.0.288.g62a8d224e6-goog > From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.3 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 43598C48BC2 for ; Wed, 23 Jun 2021 10:16:42 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 117B261164 for ; Wed, 23 Jun 2021 10:16:42 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 117B261164 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 985C36E8AB; Wed, 23 Jun 2021 10:16:41 +0000 (UTC) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by gabe.freedesktop.org (Postfix) with ESMTPS id 34A6D6E0D7; Tue, 22 Jun 2021 21:03:01 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPSA id B82596108E; Tue, 22 Jun 2021 21:02:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1624395780; bh=v96U5qnlOhDf3w1FKsu7SjrxREMp2X2HSv3JOsCkgmU=; h=Date:From:To:cc:Subject:In-Reply-To:References:From; b=jp86WFjWXckU//EExyz6NMfilYlNSGD/Sp+e74iycIMnJPnrnvb2f/IMZhcf30u/Y nZN/eIYPHlNFb7aaAK4BGrzQ8h60A0DeuaUctP8s9mDpf/LCXTiw3xhjYNzVwnhtzX TCr/gTHfn3WY41P/JfXANtN8uFlsPQPDxHmgwY0xOxtbMzYm2w8bezm6pQenS5mO9T QACOuqiKoEaVeTvNfrREoxgLiMZfrcQDhTBPBD0g1ngPW8KyWNjA64wNxxoLTDCtna okD7zfnO67pIIlP+aLcNDcQOeKWv20TpkQkk9C2UIZdw5p+0AdNoxQDYVfglebC4DR 9wbHzTawfV26w== Date: Tue, 22 Jun 2021 14:02:58 -0700 (PDT) From: Stefano Stabellini X-X-Sender: sstabellini@sstabellini-ThinkPad-T480s To: Claire Chang In-Reply-To: <20210619034043.199220-2-tientzu@chromium.org> Message-ID: References: <20210619034043.199220-1-tientzu@chromium.org> <20210619034043.199220-2-tientzu@chromium.org> User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 X-Mailman-Approved-At: Wed, 23 Jun 2021 10:16:28 +0000 Subject: Re: [Intel-gfx] [PATCH v14 01/12] swiotlb: Refactor swiotlb init functions X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: heikki.krogerus@linux.intel.com, thomas.hellstrom@linux.intel.com, peterz@infradead.org, benh@kernel.crashing.org, dri-devel@lists.freedesktop.org, chris@chris-wilson.co.uk, grant.likely@arm.com, paulus@samba.org, Frank Rowand , mingo@kernel.org, Marek Szyprowski , sstabellini@kernel.org, Saravana Kannan , mpe@ellerman.id.au, Joerg Roedel , "Rafael J . Wysocki" , Christoph Hellwig , Bartosz Golaszewski , bskeggs@redhat.com, linux-pci@vger.kernel.org, xen-devel@lists.xenproject.org, Thierry Reding , intel-gfx@lists.freedesktop.org, matthew.auld@intel.com, linux-devicetree , jxgao@google.com, Will Deacon , Konrad Rzeszutek Wilk , airlied@linux.ie, Dan Williams , linuxppc-dev@lists.ozlabs.org, Rob Herring , bhelgaas@google.com, boris.ostrovsky@oracle.com, Andy Shevchenko , jgross@suse.com, Nicolas Boichat , Greg KH , Randy Dunlap , lkml , tfiga@chromium.org, "list@263.net:IOMMU DRIVERS" , Jim Quinlan , xypron.glpk@gmx.de, thomas.lendacky@amd.com, Robin Murphy , bauerman@linux.ibm.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" On Sat, 19 Jun 2021, Claire Chang wrote: > Add a new function, swiotlb_init_io_tlb_mem, for the io_tlb_mem struct > initialization to make the code reusable. > > Signed-off-by: Claire Chang > Reviewed-by: Christoph Hellwig > Tested-by: Stefano Stabellini > Tested-by: Will Deacon Acked-by: Stefano Stabellini > --- > kernel/dma/swiotlb.c | 50 ++++++++++++++++++++++---------------------- > 1 file changed, 25 insertions(+), 25 deletions(-) > > diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c > index 52e2ac526757..1f9b2b9e7490 100644 > --- a/kernel/dma/swiotlb.c > +++ b/kernel/dma/swiotlb.c > @@ -168,9 +168,28 @@ void __init swiotlb_update_mem_attributes(void) > memset(vaddr, 0, bytes); > } > > -int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose) > +static void swiotlb_init_io_tlb_mem(struct io_tlb_mem *mem, phys_addr_t start, > + unsigned long nslabs, bool late_alloc) > { > + void *vaddr = phys_to_virt(start); > unsigned long bytes = nslabs << IO_TLB_SHIFT, i; > + > + mem->nslabs = nslabs; > + mem->start = start; > + mem->end = mem->start + bytes; > + mem->index = 0; > + mem->late_alloc = late_alloc; > + spin_lock_init(&mem->lock); > + for (i = 0; i < mem->nslabs; i++) { > + mem->slots[i].list = IO_TLB_SEGSIZE - io_tlb_offset(i); > + mem->slots[i].orig_addr = INVALID_PHYS_ADDR; > + mem->slots[i].alloc_size = 0; > + } > + memset(vaddr, 0, bytes); > +} > + > +int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose) > +{ > struct io_tlb_mem *mem; > size_t alloc_size; > > @@ -186,16 +205,8 @@ int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose) > if (!mem) > panic("%s: Failed to allocate %zu bytes align=0x%lx\n", > __func__, alloc_size, PAGE_SIZE); > - mem->nslabs = nslabs; > - mem->start = __pa(tlb); > - mem->end = mem->start + bytes; > - mem->index = 0; > - spin_lock_init(&mem->lock); > - for (i = 0; i < mem->nslabs; i++) { > - mem->slots[i].list = IO_TLB_SEGSIZE - io_tlb_offset(i); > - mem->slots[i].orig_addr = INVALID_PHYS_ADDR; > - mem->slots[i].alloc_size = 0; > - } > + > + swiotlb_init_io_tlb_mem(mem, __pa(tlb), nslabs, false); > > io_tlb_default_mem = mem; > if (verbose) > @@ -282,8 +293,8 @@ swiotlb_late_init_with_default_size(size_t default_size) > int > swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs) > { > - unsigned long bytes = nslabs << IO_TLB_SHIFT, i; > struct io_tlb_mem *mem; > + unsigned long bytes = nslabs << IO_TLB_SHIFT; > > if (swiotlb_force == SWIOTLB_NO_FORCE) > return 0; > @@ -297,20 +308,9 @@ swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs) > if (!mem) > return -ENOMEM; > > - mem->nslabs = nslabs; > - mem->start = virt_to_phys(tlb); > - mem->end = mem->start + bytes; > - mem->index = 0; > - mem->late_alloc = 1; > - spin_lock_init(&mem->lock); > - for (i = 0; i < mem->nslabs; i++) { > - mem->slots[i].list = IO_TLB_SEGSIZE - io_tlb_offset(i); > - mem->slots[i].orig_addr = INVALID_PHYS_ADDR; > - mem->slots[i].alloc_size = 0; > - } > - > + memset(mem, 0, sizeof(*mem)); > set_memory_decrypted((unsigned long)tlb, bytes >> PAGE_SHIFT); > - memset(tlb, 0, bytes); > + swiotlb_init_io_tlb_mem(mem, virt_to_phys(tlb), nslabs, true); > > io_tlb_default_mem = mem; > swiotlb_print_info(); > -- > 2.32.0.288.g62a8d224e6-goog > _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 99582C2B9F4 for ; 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h=Date:From:To:cc:Subject:In-Reply-To:References:From; b=jp86WFjWXckU//EExyz6NMfilYlNSGD/Sp+e74iycIMnJPnrnvb2f/IMZhcf30u/Y nZN/eIYPHlNFb7aaAK4BGrzQ8h60A0DeuaUctP8s9mDpf/LCXTiw3xhjYNzVwnhtzX TCr/gTHfn3WY41P/JfXANtN8uFlsPQPDxHmgwY0xOxtbMzYm2w8bezm6pQenS5mO9T QACOuqiKoEaVeTvNfrREoxgLiMZfrcQDhTBPBD0g1ngPW8KyWNjA64wNxxoLTDCtna okD7zfnO67pIIlP+aLcNDcQOeKWv20TpkQkk9C2UIZdw5p+0AdNoxQDYVfglebC4DR 9wbHzTawfV26w== Date: Tue, 22 Jun 2021 14:02:58 -0700 (PDT) From: Stefano Stabellini X-X-Sender: sstabellini@sstabellini-ThinkPad-T480s To: Claire Chang cc: Rob Herring , mpe@ellerman.id.au, Joerg Roedel , Will Deacon , Frank Rowand , Konrad Rzeszutek Wilk , boris.ostrovsky@oracle.com, jgross@suse.com, Christoph Hellwig , Marek Szyprowski , benh@kernel.crashing.org, paulus@samba.org, "list@263.net:IOMMU DRIVERS" , sstabellini@kernel.org, Robin Murphy , grant.likely@arm.com, xypron.glpk@gmx.de, Thierry Reding , mingo@kernel.org, bauerman@linux.ibm.com, peterz@infradead.org, Greg KH , Saravana Kannan , "Rafael J . Wysocki" , heikki.krogerus@linux.intel.com, Andy Shevchenko , Randy Dunlap , Dan Williams , Bartosz Golaszewski , linux-devicetree , lkml , linuxppc-dev@lists.ozlabs.org, xen-devel@lists.xenproject.org, Nicolas Boichat , Jim Quinlan , tfiga@chromium.org, bskeggs@redhat.com, bhelgaas@google.com, chris@chris-wilson.co.uk, daniel@ffwll.ch, airlied@linux.ie, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, jani.nikula@linux.intel.com, jxgao@google.com, joonas.lahtinen@linux.intel.com, linux-pci@vger.kernel.org, maarten.lankhorst@linux.intel.com, matthew.auld@intel.com, rodrigo.vivi@intel.com, thomas.hellstrom@linux.intel.com, thomas.lendacky@amd.com Subject: Re: [PATCH v14 01/12] swiotlb: Refactor swiotlb init functions In-Reply-To: <20210619034043.199220-2-tientzu@chromium.org> Message-ID: References: <20210619034043.199220-1-tientzu@chromium.org> <20210619034043.199220-2-tientzu@chromium.org> User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII On Sat, 19 Jun 2021, Claire Chang wrote: > Add a new function, swiotlb_init_io_tlb_mem, for the io_tlb_mem struct > initialization to make the code reusable. > > Signed-off-by: Claire Chang > Reviewed-by: Christoph Hellwig > Tested-by: Stefano Stabellini > Tested-by: Will Deacon Acked-by: Stefano Stabellini > --- > kernel/dma/swiotlb.c | 50 ++++++++++++++++++++++---------------------- > 1 file changed, 25 insertions(+), 25 deletions(-) > > diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c > index 52e2ac526757..1f9b2b9e7490 100644 > --- a/kernel/dma/swiotlb.c > +++ b/kernel/dma/swiotlb.c > @@ -168,9 +168,28 @@ void __init swiotlb_update_mem_attributes(void) > memset(vaddr, 0, bytes); > } > > -int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose) > +static void swiotlb_init_io_tlb_mem(struct io_tlb_mem *mem, phys_addr_t start, > + unsigned long nslabs, bool late_alloc) > { > + void *vaddr = phys_to_virt(start); > unsigned long bytes = nslabs << IO_TLB_SHIFT, i; > + > + mem->nslabs = nslabs; > + mem->start = start; > + mem->end = mem->start + bytes; > + mem->index = 0; > + mem->late_alloc = late_alloc; > + spin_lock_init(&mem->lock); > + for (i = 0; i < mem->nslabs; i++) { > + mem->slots[i].list = IO_TLB_SEGSIZE - io_tlb_offset(i); > + mem->slots[i].orig_addr = INVALID_PHYS_ADDR; > + mem->slots[i].alloc_size = 0; > + } > + memset(vaddr, 0, bytes); > +} > + > +int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose) > +{ > struct io_tlb_mem *mem; > size_t alloc_size; > > @@ -186,16 +205,8 @@ int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose) > if (!mem) > panic("%s: Failed to allocate %zu bytes align=0x%lx\n", > __func__, alloc_size, PAGE_SIZE); > - mem->nslabs = nslabs; > - mem->start = __pa(tlb); > - mem->end = mem->start + bytes; > - mem->index = 0; > - spin_lock_init(&mem->lock); > - for (i = 0; i < mem->nslabs; i++) { > - mem->slots[i].list = IO_TLB_SEGSIZE - io_tlb_offset(i); > - mem->slots[i].orig_addr = INVALID_PHYS_ADDR; > - mem->slots[i].alloc_size = 0; > - } > + > + swiotlb_init_io_tlb_mem(mem, __pa(tlb), nslabs, false); > > io_tlb_default_mem = mem; > if (verbose) > @@ -282,8 +293,8 @@ swiotlb_late_init_with_default_size(size_t default_size) > int > swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs) > { > - unsigned long bytes = nslabs << IO_TLB_SHIFT, i; > struct io_tlb_mem *mem; > + unsigned long bytes = nslabs << IO_TLB_SHIFT; > > if (swiotlb_force == SWIOTLB_NO_FORCE) > return 0; > @@ -297,20 +308,9 @@ swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs) > if (!mem) > return -ENOMEM; > > - mem->nslabs = nslabs; > - mem->start = virt_to_phys(tlb); > - mem->end = mem->start + bytes; > - mem->index = 0; > - mem->late_alloc = 1; > - spin_lock_init(&mem->lock); > - for (i = 0; i < mem->nslabs; i++) { > - mem->slots[i].list = IO_TLB_SEGSIZE - io_tlb_offset(i); > - mem->slots[i].orig_addr = INVALID_PHYS_ADDR; > - mem->slots[i].alloc_size = 0; > - } > - > + memset(mem, 0, sizeof(*mem)); > set_memory_decrypted((unsigned long)tlb, bytes >> PAGE_SHIFT); > - memset(tlb, 0, bytes); > + swiotlb_init_io_tlb_mem(mem, virt_to_phys(tlb), nslabs, true); > > io_tlb_default_mem = mem; > swiotlb_print_info(); > -- > 2.32.0.288.g62a8d224e6-goog >