From patchwork Wed Mar 30 01:59:46 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Verma, Vishal L" X-Patchwork-Id: 8692441 Return-Path: X-Original-To: patchwork-linux-block@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id E24CC9FC5B for ; Wed, 30 Mar 2016 02:01:50 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E5D2720148 for ; Wed, 30 Mar 2016 02:01:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A6BC120155 for ; Wed, 30 Mar 2016 02:01:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932487AbcC3CBb (ORCPT ); Tue, 29 Mar 2016 22:01:31 -0400 Received: from mga14.intel.com ([192.55.52.115]:40648 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753351AbcC3CAY (ORCPT ); Tue, 29 Mar 2016 22:00:24 -0400 Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga103.fm.intel.com with ESMTP; 29 Mar 2016 19:00:22 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.24,414,1455004800"; d="scan'208";a="75601546" Received: from omniknight.lm.intel.com ([10.232.112.171]) by fmsmga004.fm.intel.com with ESMTP; 29 Mar 2016 19:00:15 -0700 From: Vishal Verma To: linux-nvdimm@lists.01.org Cc: Dan Williams , linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org, xfs@oss.sgi.com, linux-ext4@vger.kernel.org, linux-mm@kvack.org, Matthew Wilcox , Ross Zwisler , Dave Chinner , Jan Kara , Jens Axboe , Al Viro , Andrew Morton , linux-kernel@vger.kernel.org, Christoph Hellwig Subject: [PATCH v2 1/5] block, dax: pass blk_dax_ctl through to drivers Date: Tue, 29 Mar 2016 19:59:46 -0600 Message-Id: <1459303190-20072-2-git-send-email-vishal.l.verma@intel.com> X-Mailer: git-send-email 2.5.5 In-Reply-To: <1459303190-20072-1-git-send-email-vishal.l.verma@intel.com> References: <1459303190-20072-1-git-send-email-vishal.l.verma@intel.com> Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org X-Spam-Status: No, score=-7.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Dan Williams This is in preparation for doing badblocks checking against the requested sector range in the driver. Currently we opportunistically return as much data that can be "dax'd" starting at the given sector. When errors are present we want to limit that range to the first encountered error, or fail the dax request if the range encompasses an error. Signed-off-by: Dan Williams Reviewed-by: Jeff Moyer --- arch/powerpc/sysdev/axonram.c | 10 +++++----- drivers/block/brd.c | 9 +++++---- drivers/nvdimm/pmem.c | 9 +++++---- drivers/s390/block/dcssblk.c | 12 ++++++------ fs/block_dev.c | 2 +- include/linux/blkdev.h | 3 +-- 6 files changed, 23 insertions(+), 22 deletions(-) diff --git a/arch/powerpc/sysdev/axonram.c b/arch/powerpc/sysdev/axonram.c index 0d112b9..d85673f 100644 --- a/arch/powerpc/sysdev/axonram.c +++ b/arch/powerpc/sysdev/axonram.c @@ -139,17 +139,17 @@ axon_ram_make_request(struct request_queue *queue, struct bio *bio) /** * axon_ram_direct_access - direct_access() method for block device - * @device, @sector, @data: see block_device_operations method + * @dax: see block_device_operations method */ static long -axon_ram_direct_access(struct block_device *device, sector_t sector, - void __pmem **kaddr, pfn_t *pfn) +axon_ram_direct_access(struct block_device *device, struct blk_dax_ctl *dax) { + sector_t sector = get_start_sect(device) + dax->sector; struct axon_ram_bank *bank = device->bd_disk->private_data; loff_t offset = (loff_t)sector << AXON_RAM_SECTOR_SHIFT; - *kaddr = (void __pmem __force *) bank->io_addr + offset; - *pfn = phys_to_pfn_t(bank->ph_addr + offset, PFN_DEV); + dax->addr = (void __pmem __force *) bank->io_addr + offset; + dax->pfn = phys_to_pfn_t(bank->ph_addr + offset, PFN_DEV); return bank->size - offset; } diff --git a/drivers/block/brd.c b/drivers/block/brd.c index f7ecc28..e3e4780 100644 --- a/drivers/block/brd.c +++ b/drivers/block/brd.c @@ -380,9 +380,10 @@ static int brd_rw_page(struct block_device *bdev, sector_t sector, } #ifdef CONFIG_BLK_DEV_RAM_DAX -static long brd_direct_access(struct block_device *bdev, sector_t sector, - void __pmem **kaddr, pfn_t *pfn) +static long brd_direct_access(struct block_device *bdev, + struct blk_dax_ctl *dax) { + sector_t sector = get_start_sect(bdev) + dax->sector; struct brd_device *brd = bdev->bd_disk->private_data; struct page *page; @@ -391,8 +392,8 @@ static long brd_direct_access(struct block_device *bdev, sector_t sector, page = brd_insert_page(brd, sector); if (!page) return -ENOSPC; - *kaddr = (void __pmem *)page_address(page); - *pfn = page_to_pfn_t(page); + dax->addr = (void __pmem *)page_address(page); + dax->pfn = page_to_pfn_t(page); return PAGE_SIZE; } diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c index ca5721c..da10554 100644 --- a/drivers/nvdimm/pmem.c +++ b/drivers/nvdimm/pmem.c @@ -167,14 +167,15 @@ static int pmem_rw_page(struct block_device *bdev, sector_t sector, return rc; } -static long pmem_direct_access(struct block_device *bdev, sector_t sector, - void __pmem **kaddr, pfn_t *pfn) +static long pmem_direct_access(struct block_device *bdev, + struct blk_dax_ctl *dax) { + sector_t sector = get_start_sect(bdev) + dax->sector; struct pmem_device *pmem = bdev->bd_disk->private_data; resource_size_t offset = sector * 512 + pmem->data_offset; - *kaddr = pmem->virt_addr + offset; - *pfn = phys_to_pfn_t(pmem->phys_addr + offset, pmem->pfn_flags); + dax->addr = pmem->virt_addr + offset; + dax->pfn = phys_to_pfn_t(pmem->phys_addr + offset, pmem->pfn_flags); return pmem->size - pmem->pfn_pad - offset; } diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c index 1bce9cf..5719c30 100644 --- a/drivers/s390/block/dcssblk.c +++ b/drivers/s390/block/dcssblk.c @@ -30,8 +30,8 @@ static int dcssblk_open(struct block_device *bdev, fmode_t mode); static void dcssblk_release(struct gendisk *disk, fmode_t mode); static blk_qc_t dcssblk_make_request(struct request_queue *q, struct bio *bio); -static long dcssblk_direct_access(struct block_device *bdev, sector_t secnum, - void __pmem **kaddr, pfn_t *pfn); +static long dcssblk_direct_access(struct block_device *bdev, + struct blk_dax_ctl *dax) static char dcssblk_segments[DCSSBLK_PARM_LEN] = "\0"; @@ -882,9 +882,9 @@ fail: } static long -dcssblk_direct_access (struct block_device *bdev, sector_t secnum, - void __pmem **kaddr, pfn_t *pfn) +dcssblk_direct_access(struct block_device *bdev, struct blk_dax_ctl *dax) { + sector_t secnum = get_start_sect(bdev) + dax->sector; struct dcssblk_dev_info *dev_info; unsigned long offset, dev_sz; @@ -893,8 +893,8 @@ dcssblk_direct_access (struct block_device *bdev, sector_t secnum, return -ENODEV; dev_sz = dev_info->end - dev_info->start; offset = secnum * 512; - *kaddr = (void __pmem *) (dev_info->start + offset); - *pfn = __pfn_to_pfn_t(PFN_DOWN(dev_info->start + offset), PFN_DEV); + dax->addr = (void __pmem *) (dev_info->start + offset); + dax->pfn = __pfn_to_pfn_t(PFN_DOWN(dev_info->start + offset), PFN_DEV); return dev_sz - offset; } diff --git a/fs/block_dev.c b/fs/block_dev.c index 3172c4e..c5837fa 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -488,7 +488,7 @@ long bdev_direct_access(struct block_device *bdev, struct blk_dax_ctl *dax) sector += get_start_sect(bdev); if (sector % (PAGE_SIZE / 512)) return -EINVAL; - avail = ops->direct_access(bdev, sector, &dax->addr, &dax->pfn); + avail = ops->direct_access(bdev, dax); if (!avail) return -ERANGE; if (avail > 0 && avail & ~PAGE_MASK) diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 7e5d7e0..92f8a1f 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1656,8 +1656,7 @@ struct block_device_operations { int (*rw_page)(struct block_device *, sector_t, struct page *, int rw); int (*ioctl) (struct block_device *, fmode_t, unsigned, unsigned long); int (*compat_ioctl) (struct block_device *, fmode_t, unsigned, unsigned long); - long (*direct_access)(struct block_device *, sector_t, void __pmem **, - pfn_t *); + long (*direct_access)(struct block_device *, struct blk_dax_ctl *dax); unsigned int (*check_events) (struct gendisk *disk, unsigned int clearing); /* ->media_changed() is DEPRECATED, use ->check_events() instead */