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From: Vivek Goyal <vgoyal@redhat.com>
To: linux-fsdevel@vger.kernel.org, linux-nvdimm@lists.01.org,
	hch@infradead.org, dan.j.williams@intel.com
Cc: david@fromorbit.com, dm-devel@redhat.com,
	linux-s390@vger.kernel.org,
	Gerald Schaefer <gerald.schaefer@de.ibm.com>
Subject: [PATCH v6 3/6] s390,dcssblk,dax: Add dax zero_page_range operation to dcssblk driver
Date: Fri, 28 Feb 2020 11:34:53 -0500	[thread overview]
Message-ID: <20200228163456.1587-4-vgoyal@redhat.com> (raw)
In-Reply-To: <20200228163456.1587-1-vgoyal@redhat.com>

Add dax operation zero_page_range for dcssblk driver.

CC: linux-s390@vger.kernel.org
Suggested-by: Christoph Hellwig <hch@infradead.org>
Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
---
 drivers/s390/block/dcssblk.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c
index 63502ca537eb..ab3e2898816c 100644
--- a/drivers/s390/block/dcssblk.c
+++ b/drivers/s390/block/dcssblk.c
@@ -57,11 +57,26 @@ static size_t dcssblk_dax_copy_to_iter(struct dax_device *dax_dev,
 	return copy_to_iter(addr, bytes, i);
 }
 
+static int dcssblk_dax_zero_page_range(struct dax_device *dax_dev,
+				       pgoff_t pgoff, size_t nr_pages)
+{
+	long rc;
+	void *kaddr;
+
+	rc = dax_direct_access(dax_dev, pgoff, nr_pages, &kaddr, NULL);
+	if (rc < 0)
+		return rc;
+	memset(kaddr, 0, nr_pages << PAGE_SHIFT);
+	dax_flush(dax_dev, kaddr, nr_pages << PAGE_SHIFT);
+	return 0;
+}
+
 static const struct dax_operations dcssblk_dax_ops = {
 	.direct_access = dcssblk_dax_direct_access,
 	.dax_supported = generic_fsdax_supported,
 	.copy_from_iter = dcssblk_dax_copy_from_iter,
 	.copy_to_iter = dcssblk_dax_copy_to_iter,
+	.zero_page_range = dcssblk_dax_zero_page_range,
 };
 
 struct dcssblk_dev_info {
-- 
2.20.1
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WARNING: multiple messages have this Message-ID (diff)
From: Vivek Goyal <vgoyal@redhat.com>
To: linux-fsdevel@vger.kernel.org, linux-nvdimm@lists.01.org,
	hch@infradead.org, dan.j.williams@intel.com
Cc: vgoyal@redhat.com, david@fromorbit.com, jmoyer@redhat.com,
	dm-devel@redhat.com, linux-s390@vger.kernel.org,
	Gerald Schaefer <gerald.schaefer@de.ibm.com>
Subject: [PATCH v6 3/6] s390,dcssblk,dax: Add dax zero_page_range operation to dcssblk driver
Date: Fri, 28 Feb 2020 11:34:53 -0500	[thread overview]
Message-ID: <20200228163456.1587-4-vgoyal@redhat.com> (raw)
In-Reply-To: <20200228163456.1587-1-vgoyal@redhat.com>

Add dax operation zero_page_range for dcssblk driver.

CC: linux-s390@vger.kernel.org
Suggested-by: Christoph Hellwig <hch@infradead.org>
Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
---
 drivers/s390/block/dcssblk.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c
index 63502ca537eb..ab3e2898816c 100644
--- a/drivers/s390/block/dcssblk.c
+++ b/drivers/s390/block/dcssblk.c
@@ -57,11 +57,26 @@ static size_t dcssblk_dax_copy_to_iter(struct dax_device *dax_dev,
 	return copy_to_iter(addr, bytes, i);
 }
 
+static int dcssblk_dax_zero_page_range(struct dax_device *dax_dev,
+				       pgoff_t pgoff, size_t nr_pages)
+{
+	long rc;
+	void *kaddr;
+
+	rc = dax_direct_access(dax_dev, pgoff, nr_pages, &kaddr, NULL);
+	if (rc < 0)
+		return rc;
+	memset(kaddr, 0, nr_pages << PAGE_SHIFT);
+	dax_flush(dax_dev, kaddr, nr_pages << PAGE_SHIFT);
+	return 0;
+}
+
 static const struct dax_operations dcssblk_dax_ops = {
 	.direct_access = dcssblk_dax_direct_access,
 	.dax_supported = generic_fsdax_supported,
 	.copy_from_iter = dcssblk_dax_copy_from_iter,
 	.copy_to_iter = dcssblk_dax_copy_to_iter,
+	.zero_page_range = dcssblk_dax_zero_page_range,
 };
 
 struct dcssblk_dev_info {
-- 
2.20.1

  parent reply	other threads:[~2020-02-28 16:35 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-28 16:34 [PATCH v6 0/6] dax/pmem: Provide a dax operation to zero page range Vivek Goyal
2020-02-28 16:34 ` Vivek Goyal
2020-02-28 16:34 ` [PATCH v6 1/6] pmem: Add functions for reading/writing page to/from pmem Vivek Goyal
2020-02-28 16:34   ` Vivek Goyal
2020-02-29  8:04   ` Pankaj Gupta
2020-02-29  8:04     ` Pankaj Gupta
2020-03-04 16:16     ` Christoph Hellwig
2020-03-04 16:16       ` Christoph Hellwig
2020-03-04 18:44     ` Vivek Goyal
2020-03-04 18:44       ` Vivek Goyal
2020-02-28 16:34 ` [PATCH v6 2/6] dax, pmem: Add a dax operation zero_page_range Vivek Goyal
2020-02-28 16:34   ` Vivek Goyal
2020-02-29  9:21   ` Pankaj Gupta
2020-02-29  9:21     ` Pankaj Gupta
2020-02-28 16:34 ` Vivek Goyal [this message]
2020-02-28 16:34   ` [PATCH v6 3/6] s390,dcssblk,dax: Add dax zero_page_range operation to dcssblk driver Vivek Goyal
2020-02-28 16:34 ` [PATCH v6 4/6] dm,dax: Add dax zero_page_range operation Vivek Goyal
2020-02-28 16:34   ` Vivek Goyal
2020-03-31 19:34   ` Dan Williams
2020-03-31 19:34     ` Dan Williams
2020-04-03  0:49     ` Dan Williams
2020-04-03  0:49       ` Dan Williams
2020-04-03  1:02     ` Mike Snitzer
2020-04-03  1:02       ` Mike Snitzer
2020-02-28 16:34 ` [PATCH v6 5/6] dax: Use new dax zero page method for zeroing a page Vivek Goyal
2020-02-28 16:34   ` Vivek Goyal
2020-02-28 16:34 ` [PATCH v6 6/6] dax,iomap: Add helper dax_iomap_zero() to zero a range Vivek Goyal
2020-02-28 16:34   ` Vivek Goyal
2020-02-29  9:16 ` [PATCH v6 0/6] dax/pmem: Provide a dax operation to zero page range Pankaj Gupta
2020-02-29  9:16   ` Pankaj Gupta
2020-03-10 12:18 ` Vivek Goyal
2020-03-10 12:18   ` Vivek Goyal
2020-04-01 16:11 ` [PATCH v6 7/6] dax: Move mandatory ->zero_page_range() check in alloc_dax() Vivek Goyal
2020-04-01 16:11   ` Vivek Goyal

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