From patchwork Mon Apr 17 19:10:21 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Williams X-Patchwork-Id: 9684383 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 68618600F6 for ; Mon, 17 Apr 2017 19:22:26 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 59C742041F for ; Mon, 17 Apr 2017 19:22:26 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4EF7B209D8; Mon, 17 Apr 2017 19:22:26 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A27BB2041F for ; Mon, 17 Apr 2017 19:22:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757204AbdDQTQI (ORCPT ); Mon, 17 Apr 2017 15:16:08 -0400 Received: from mga01.intel.com ([192.55.52.88]:55676 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757263AbdDQTQG (ORCPT ); Mon, 17 Apr 2017 15:16:06 -0400 Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga101.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 17 Apr 2017 12:16:05 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.37,215,1488873600"; d="scan'208";a="90539577" Received: from dwillia2-desk3.jf.intel.com (HELO dwillia2-desk3.amr.corp.intel.com) ([10.54.39.125]) by fmsmga005.fm.intel.com with ESMTP; 17 Apr 2017 12:16:05 -0700 Subject: [resend PATCH v2 17/33] block: remove block_device_operations ->direct_access() From: Dan Williams To: linux-nvdimm@lists.01.org Cc: linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org, dm-devel@redhat.com, linux-kernel@vger.kernel.org, hch@lst.de Date: Mon, 17 Apr 2017 12:10:21 -0700 Message-ID: <149245622170.10206.2196597933362879172.stgit@dwillia2-desk3.amr.corp.intel.com> In-Reply-To: <149245612770.10206.15496018295337908594.stgit@dwillia2-desk3.amr.corp.intel.com> References: <149245612770.10206.15496018295337908594.stgit@dwillia2-desk3.amr.corp.intel.com> User-Agent: StGit/0.17.1-9-g687f MIME-Version: 1.0 Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Now that all the producers and consumers of dax interfaces have been converted to using dax_operations on a dax_device, remove the block device direct_access enabling. Signed-off-by: Dan Williams --- arch/powerpc/sysdev/axonram.c | 23 ++++----------------- drivers/block/brd.c | 15 -------------- drivers/md/dm.c | 13 ------------ drivers/nvdimm/pmem.c | 10 --------- drivers/s390/block/dcssblk.c | 16 --------------- fs/block_dev.c | 45 ----------------------------------------- include/linux/blkdev.h | 17 --------------- 7 files changed, 4 insertions(+), 135 deletions(-) diff --git a/arch/powerpc/sysdev/axonram.c b/arch/powerpc/sysdev/axonram.c index ad857d5e81b1..83eb56ff1d2c 100644 --- a/arch/powerpc/sysdev/axonram.c +++ b/arch/powerpc/sysdev/axonram.c @@ -139,6 +139,10 @@ axon_ram_make_request(struct request_queue *queue, struct bio *bio) return BLK_QC_T_NONE; } +static const struct block_device_operations axon_ram_devops = { + .owner = THIS_MODULE, +}; + static long __axon_ram_direct_access(struct axon_ram_bank *bank, pgoff_t pgoff, long nr_pages, void **kaddr, pfn_t *pfn) @@ -150,25 +154,6 @@ __axon_ram_direct_access(struct axon_ram_bank *bank, pgoff_t pgoff, long nr_page return (bank->size - offset) / PAGE_SIZE; } -/** - * axon_ram_direct_access - direct_access() method for block device - * @device, @sector, @data: see block_device_operations method - */ -static long -axon_ram_blk_direct_access(struct block_device *device, sector_t sector, - void **kaddr, pfn_t *pfn, long size) -{ - struct axon_ram_bank *bank = device->bd_disk->private_data; - - return __axon_ram_direct_access(bank, (sector * 512) / PAGE_SIZE, - size / PAGE_SIZE, kaddr, pfn) * PAGE_SIZE; -} - -static const struct block_device_operations axon_ram_devops = { - .owner = THIS_MODULE, - .direct_access = axon_ram_blk_direct_access -}; - static long axon_ram_dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff, long nr_pages, void **kaddr, pfn_t *pfn) diff --git a/drivers/block/brd.c b/drivers/block/brd.c index 60f3193c9ce2..bfa4ed2c75ef 100644 --- a/drivers/block/brd.c +++ b/drivers/block/brd.c @@ -395,18 +395,6 @@ static long __brd_direct_access(struct brd_device *brd, pgoff_t pgoff, return 1; } -static long brd_blk_direct_access(struct block_device *bdev, sector_t sector, - void **kaddr, pfn_t *pfn, long size) -{ - struct brd_device *brd = bdev->bd_disk->private_data; - long nr_pages = __brd_direct_access(brd, PHYS_PFN(sector * 512), - PHYS_PFN(size), kaddr, pfn); - - if (nr_pages < 0) - return nr_pages; - return nr_pages * PAGE_SIZE; -} - static long brd_dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff, long nr_pages, void **kaddr, pfn_t *pfn) { @@ -418,14 +406,11 @@ static long brd_dax_direct_access(struct dax_device *dax_dev, static const struct dax_operations brd_dax_ops = { .direct_access = brd_dax_direct_access, }; -#else -#define brd_blk_direct_access NULL #endif static const struct block_device_operations brd_fops = { .owner = THIS_MODULE, .rw_page = brd_rw_page, - .direct_access = brd_blk_direct_access, }; /* diff --git a/drivers/md/dm.c b/drivers/md/dm.c index ef4c6f8cad47..79d5f5fd823e 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -957,18 +957,6 @@ static long dm_dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff, return ret; } -static long dm_blk_direct_access(struct block_device *bdev, sector_t sector, - void **kaddr, pfn_t *pfn, long size) -{ - struct mapped_device *md = bdev->bd_disk->private_data; - struct dax_device *dax_dev = md->dax_dev; - long nr_pages = size / PAGE_SIZE; - - nr_pages = dm_dax_direct_access(dax_dev, sector / PAGE_SECTORS, - nr_pages, kaddr, pfn); - return nr_pages < 0 ? nr_pages : nr_pages * PAGE_SIZE; -} - /* * A target may call dm_accept_partial_bio only from the map routine. It is * allowed for all bio types except REQ_PREFLUSH. @@ -2823,7 +2811,6 @@ static const struct block_device_operations dm_blk_dops = { .open = dm_blk_open, .release = dm_blk_close, .ioctl = dm_blk_ioctl, - .direct_access = dm_blk_direct_access, .getgeo = dm_blk_getgeo, .pr_ops = &dm_pr_ops, .owner = THIS_MODULE diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c index fbbcf8154eec..85b85633d674 100644 --- a/drivers/nvdimm/pmem.c +++ b/drivers/nvdimm/pmem.c @@ -220,19 +220,9 @@ __weak long __pmem_direct_access(struct pmem_device *pmem, pgoff_t pgoff, return PHYS_PFN(pmem->size - pmem->pfn_pad - offset); } -static long pmem_blk_direct_access(struct block_device *bdev, sector_t sector, - void **kaddr, pfn_t *pfn, long size) -{ - struct pmem_device *pmem = bdev->bd_queue->queuedata; - - return __pmem_direct_access(pmem, PHYS_PFN(sector * 512), - PHYS_PFN(size), kaddr, pfn); -} - static const struct block_device_operations pmem_fops = { .owner = THIS_MODULE, .rw_page = pmem_rw_page, - .direct_access = pmem_blk_direct_access, .revalidate_disk = nvdimm_revalidate_disk, }; diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c index 682a9eb4934d..1586e11b979e 100644 --- a/drivers/s390/block/dcssblk.c +++ b/drivers/s390/block/dcssblk.c @@ -31,8 +31,6 @@ 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_blk_direct_access(struct block_device *bdev, sector_t secnum, - void **kaddr, pfn_t *pfn, long size); static long dcssblk_dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff, long nr_pages, void **kaddr, pfn_t *pfn); @@ -43,7 +41,6 @@ static const struct block_device_operations dcssblk_devops = { .owner = THIS_MODULE, .open = dcssblk_open, .release = dcssblk_release, - .direct_access = dcssblk_blk_direct_access, }; static const struct dax_operations dcssblk_dax_ops = { @@ -915,19 +912,6 @@ __dcssblk_direct_access(struct dcssblk_dev_info *dev_info, pgoff_t pgoff, } static long -dcssblk_blk_direct_access(struct block_device *bdev, sector_t secnum, - void **kaddr, pfn_t *pfn, long size) -{ - struct dcssblk_dev_info *dev_info; - - dev_info = bdev->bd_disk->private_data; - if (!dev_info) - return -ENODEV; - return __dcssblk_direct_access(dev_info, PHYS_PFN(secnum * 512), - PHYS_PFN(size), kaddr, pfn) * PAGE_SIZE; -} - -static long dcssblk_dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff, long nr_pages, void **kaddr, pfn_t *pfn) { diff --git a/fs/block_dev.c b/fs/block_dev.c index ecbdc8f9f718..10e21465d5a9 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -718,51 +718,6 @@ int bdev_write_page(struct block_device *bdev, sector_t sector, } EXPORT_SYMBOL_GPL(bdev_write_page); -/** - * bdev_direct_access() - Get the address for directly-accessibly memory - * @bdev: The device containing the memory - * @dax: control and output parameters for ->direct_access - * - * If a block device is made up of directly addressable memory, this function - * will tell the caller the PFN and the address of the memory. The address - * may be directly dereferenced within the kernel without the need to call - * ioremap(), kmap() or similar. The PFN is suitable for inserting into - * page tables. - * - * Return: negative errno if an error occurs, otherwise the number of bytes - * accessible at this address. - */ -long bdev_direct_access(struct block_device *bdev, struct blk_dax_ctl *dax) -{ - sector_t sector = dax->sector; - long avail, size = dax->size; - const struct block_device_operations *ops = bdev->bd_disk->fops; - - /* - * The device driver is allowed to sleep, in order to make the - * memory directly accessible. - */ - might_sleep(); - - if (size < 0) - return size; - if (!blk_queue_dax(bdev_get_queue(bdev)) || !ops->direct_access) - return -EOPNOTSUPP; - if ((sector + DIV_ROUND_UP(size, 512)) > - part_nr_sects_read(bdev->bd_part)) - return -ERANGE; - sector += get_start_sect(bdev); - if (sector % (PAGE_SIZE / 512)) - return -EINVAL; - avail = ops->direct_access(bdev, sector, &dax->addr, &dax->pfn, size); - if (!avail) - return -ERANGE; - if (avail > 0 && avail & ~PAGE_MASK) - return -ENXIO; - return min(avail, size); -} -EXPORT_SYMBOL_GPL(bdev_direct_access); - int bdev_dax_pgoff(struct block_device *bdev, sector_t sector, size_t size, pgoff_t *pgoff) { diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 612c497d1461..848f87eb1905 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1916,28 +1916,12 @@ static inline bool integrity_req_gap_front_merge(struct request *req, #endif /* CONFIG_BLK_DEV_INTEGRITY */ -/** - * struct blk_dax_ctl - control and output parameters for ->direct_access - * @sector: (input) offset relative to a block_device - * @addr: (output) kernel virtual address for @sector populated by driver - * @pfn: (output) page frame number for @addr populated by driver - * @size: (input) number of bytes requested - */ -struct blk_dax_ctl { - sector_t sector; - void *addr; - long size; - pfn_t pfn; -}; - struct block_device_operations { int (*open) (struct block_device *, fmode_t); void (*release) (struct gendisk *, fmode_t); int (*rw_page)(struct block_device *, sector_t, struct page *, bool); 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 **, pfn_t *, - long); unsigned int (*check_events) (struct gendisk *disk, unsigned int clearing); /* ->media_changed() is DEPRECATED, use ->check_events() instead */ @@ -1956,7 +1940,6 @@ extern int __blkdev_driver_ioctl(struct block_device *, fmode_t, unsigned int, extern int bdev_read_page(struct block_device *, sector_t, struct page *); extern int bdev_write_page(struct block_device *, sector_t, struct page *, struct writeback_control *); -extern long bdev_direct_access(struct block_device *, struct blk_dax_ctl *); extern int bdev_dax_supported(struct super_block *, int); int bdev_dax_pgoff(struct block_device *, sector_t, size_t, pgoff_t *pgoff); #else /* CONFIG_BLOCK */