From patchwork Fri Apr 14 11:27:33 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans Verkuil X-Patchwork-Id: 674358 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 90660C77B72 for ; Fri, 14 Apr 2023 11:28:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230194AbjDNL2A (ORCPT ); Fri, 14 Apr 2023 07:28:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58452 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230036AbjDNL14 (ORCPT ); Fri, 14 Apr 2023 07:27:56 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F3D931FDA for ; Fri, 14 Apr 2023 04:27:54 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 9027C646D9 for ; Fri, 14 Apr 2023 11:27:54 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6DBFCC433EF; Fri, 14 Apr 2023 11:27:53 +0000 (UTC) From: Hans Verkuil To: linux-media@vger.kernel.org Cc: Hans Verkuil Subject: [PATCHv3 09/18] media: common: saa7146: use for_each_sg_dma_page Date: Fri, 14 Apr 2023 13:27:33 +0200 Message-Id: <20230414112742.27749-10-hverkuil-cisco@xs4all.nl> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230414112742.27749-1-hverkuil-cisco@xs4all.nl> References: <20230414112742.27749-1-hverkuil-cisco@xs4all.nl> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org When building the pgtables, use for_each_sg_dma_page. Also clean up the code a bit. Signed-off-by: Hans Verkuil --- drivers/media/common/saa7146/saa7146_core.c | 29 ++------ drivers/media/common/saa7146/saa7146_video.c | 76 +++++++------------- 2 files changed, 32 insertions(+), 73 deletions(-) diff --git a/drivers/media/common/saa7146/saa7146_core.c b/drivers/media/common/saa7146/saa7146_core.c index f15caf54771b..bcb957883044 100644 --- a/drivers/media/common/saa7146/saa7146_core.c +++ b/drivers/media/common/saa7146/saa7146_core.c @@ -235,11 +235,12 @@ int saa7146_pgtable_alloc(struct pci_dev *pci, struct saa7146_pgtable *pt) } int saa7146_pgtable_build_single(struct pci_dev *pci, struct saa7146_pgtable *pt, - struct scatterlist *list, int sglen ) + struct scatterlist *list, int sglen) { + struct sg_dma_page_iter dma_iter; __le32 *ptr, fill; int nr_pages = 0; - int i,p; + int i; if (WARN_ON(!sglen) || WARN_ON(list->offset > PAGE_SIZE)) @@ -250,32 +251,16 @@ int saa7146_pgtable_build_single(struct pci_dev *pci, struct saa7146_pgtable *pt pt->offset = list->offset; ptr = pt->cpu; - for (i = 0; i < sglen; i++, list++) { -/* - pr_debug("i:%d, adr:0x%08x, len:%d, offset:%d\n", - i, sg_dma_address(list), sg_dma_len(list), - list->offset); -*/ - for (p = 0; p * 4096 < sg_dma_len(list); p++, ptr++) { - *ptr = cpu_to_le32(sg_dma_address(list) + p * 4096); - nr_pages++; - } + for_each_sg_dma_page(list, &dma_iter, sglen, 0) { + *ptr++ = cpu_to_le32(sg_page_iter_dma_address(&dma_iter)); + nr_pages++; } /* safety; fill the page table up with the last valid page */ fill = *(ptr-1); - for(i=nr_pages;i<1024;i++) { + for (i = nr_pages; i < 1024; i++) *ptr++ = fill; - } - -/* - ptr = pt->cpu; - pr_debug("offset: %d\n", pt->offset); - for(i=0;i<5;i++) { - pr_debug("ptr1 %d: 0x%08x\n", i, ptr[i]); - } -*/ return 0; } diff --git a/drivers/media/common/saa7146/saa7146_video.c b/drivers/media/common/saa7146/saa7146_video.c index bc4e8d12873b..6af30fece176 100644 --- a/drivers/media/common/saa7146/saa7146_video.c +++ b/drivers/media/common/saa7146/saa7146_video.c @@ -107,31 +107,32 @@ static int saa7146_pgtable_build(struct saa7146_dev *dev, struct saa7146_buf *bu struct saa7146_pgtable *pt1 = &buf->pt[0]; struct saa7146_pgtable *pt2 = &buf->pt[1]; struct saa7146_pgtable *pt3 = &buf->pt[2]; + struct sg_dma_page_iter dma_iter; __le32 *ptr1, *ptr2, *ptr3; __le32 fill; int size = pix->width * pix->height; - int i,p,m1,m2,m3,o1,o2; + int i, m1, m2, m3, o1, o2; switch( sfmt->depth ) { case 12: { /* create some offsets inside the page table */ - m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1; - m2 = ((size+(size/4)+PAGE_SIZE)/PAGE_SIZE)-1; - m3 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1; - o1 = size%PAGE_SIZE; - o2 = (size+(size/4))%PAGE_SIZE; + m1 = ((size + PAGE_SIZE) / PAGE_SIZE) - 1; + m2 = ((size + (size / 4) + PAGE_SIZE) / PAGE_SIZE) - 1; + m3 = ((size + (size / 2) + PAGE_SIZE) / PAGE_SIZE) - 1; + o1 = size % PAGE_SIZE; + o2 = (size + (size / 4)) % PAGE_SIZE; DEB_CAP("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n", size, m1, m2, m3, o1, o2); break; } case 16: { /* create some offsets inside the page table */ - m1 = ((size+PAGE_SIZE)/PAGE_SIZE)-1; - m2 = ((size+(size/2)+PAGE_SIZE)/PAGE_SIZE)-1; - m3 = ((2*size+PAGE_SIZE)/PAGE_SIZE)-1; - o1 = size%PAGE_SIZE; - o2 = (size+(size/2))%PAGE_SIZE; + m1 = ((size + PAGE_SIZE) / PAGE_SIZE) - 1; + m2 = ((size + (size / 2) + PAGE_SIZE) / PAGE_SIZE) - 1; + m3 = ((2 * size + PAGE_SIZE) / PAGE_SIZE) - 1; + o1 = size % PAGE_SIZE; + o2 = (size + (size / 2)) % PAGE_SIZE; DEB_CAP("size:%d, m1:%d, m2:%d, m3:%d, o1:%d, o2:%d\n", size, m1, m2, m3, o1, o2); break; @@ -145,64 +146,37 @@ static int saa7146_pgtable_build(struct saa7146_dev *dev, struct saa7146_buf *bu ptr2 = pt2->cpu; ptr3 = pt3->cpu; - /* walk all pages, copy all page addresses to ptr1 */ - for (i = 0; i < length; i++, list++) { - for (p = 0; p * 4096 < sg_dma_len(list); p++, ptr1++) - *ptr1 = cpu_to_le32(sg_dma_address(list) - list->offset); - } -/* - ptr1 = pt1->cpu; - for(j=0;j<40;j++) { - printk("ptr1 %d: 0x%08x\n",j,ptr1[j]); - } -*/ + for_each_sg_dma_page(list, &dma_iter, length, 0) + *ptr1++ = cpu_to_le32(sg_page_iter_dma_address(&dma_iter) - list->offset); /* if we have a user buffer, the first page may not be aligned to a page boundary. */ pt1->offset = dma->sglist->offset; - pt2->offset = pt1->offset+o1; - pt3->offset = pt1->offset+o2; + pt2->offset = pt1->offset + o1; + pt3->offset = pt1->offset + o2; /* create video-dma2 page table */ ptr1 = pt1->cpu; - for(i = m1; i <= m2 ; i++, ptr2++) { + for (i = m1; i <= m2; i++, ptr2++) *ptr2 = ptr1[i]; - } - fill = *(ptr2-1); - for(;i<1024;i++,ptr2++) { + fill = *(ptr2 - 1); + for (; i < 1024; i++, ptr2++) *ptr2 = fill; - } /* create video-dma3 page table */ ptr1 = pt1->cpu; - for(i = m2; i <= m3; i++,ptr3++) { + for (i = m2; i <= m3; i++, ptr3++) *ptr3 = ptr1[i]; - } - fill = *(ptr3-1); - for(;i<1024;i++,ptr3++) { + fill = *(ptr3 - 1); + for (; i < 1024; i++, ptr3++) *ptr3 = fill; - } /* finally: finish up video-dma1 page table */ - ptr1 = pt1->cpu+m1; + ptr1 = pt1->cpu + m1; fill = pt1->cpu[m1]; - for(i=m1;i<1024;i++,ptr1++) { + for (i = m1; i < 1024; i++, ptr1++) *ptr1 = fill; - } -/* - ptr1 = pt1->cpu; - ptr2 = pt2->cpu; - ptr3 = pt3->cpu; - for(j=0;j<40;j++) { - printk("ptr1 %d: 0x%08x\n",j,ptr1[j]); - } - for(j=0;j<40;j++) { - printk("ptr2 %d: 0x%08x\n",j,ptr2[j]); - } - for(j=0;j<40;j++) { - printk("ptr3 %d: 0x%08x\n",j,ptr3[j]); - } -*/ } else { struct saa7146_pgtable *pt = &buf->pt[0]; + return saa7146_pgtable_build_single(pci, pt, list, length); }