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Tue, 5 Apr 2022 19:48:30 +0000 From: Jane Chu To: david@fromorbit.com, djwong@kernel.org, dan.j.williams@intel.com, hch@infradead.org, vishal.l.verma@intel.com, dave.jiang@intel.com, agk@redhat.com, snitzer@redhat.com, dm-devel@redhat.com, ira.weiny@intel.com, willy@infradead.org, vgoyal@redhat.com, linux-fsdevel@vger.kernel.org, nvdimm@lists.linux.dev, linux-kernel@vger.kernel.org, linux-xfs@vger.kernel.org, x86@kernel.org Date: Tue, 5 Apr 2022 13:47:46 -0600 Message-Id: <20220405194747.2386619-6-jane.chu@oracle.com> In-Reply-To: <20220405194747.2386619-1-jane.chu@oracle.com> References: <20220405194747.2386619-1-jane.chu@oracle.com> X-ClientProxiedBy: SA9PR13CA0054.namprd13.prod.outlook.com (2603:10b6:806:22::29) To SJ0PR10MB4429.namprd10.prod.outlook.com (2603:10b6:a03:2d1::14) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 7fe97c7e-e48e-4e29-3b9a-08da173d4293 X-MS-TrafficTypeDiagnostic: BN6PR10MB1425:EE_ X-Microsoft-Antispam-PRVS: X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0 X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255; 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Similar Internal Domain=false; Similar Monitored External Domain=false; Custom External Domain=false; Mimecast External Domain=false; Newly Observed Domain=false; Internal User Name=false; Custom Display Name List=false; Reply-to Address Mismatch=false; Targeted Threat Dictionary=false; Mimecast Threat Dictionary=false; Custom Threat Dictionary=false X-Scanned-By: MIMEDefang 2.84 on 10.11.54.1 Subject: [dm-devel] [PATCH v7 5/6] pmem: refactor pmem_clear_poison() X-BeenThere: dm-devel@redhat.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: device-mapper development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dm-devel-bounces@redhat.com Sender: "dm-devel" X-Scanned-By: MIMEDefang 2.85 on 10.11.54.7 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dm-devel-bounces@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Refactor the pmem_clear_poison() in order to share common code later. Signed-off-by: Jane Chu Reviewed-by: Christoph Hellwig Reviewed-by: Dan Williams --- drivers/nvdimm/pmem.c | 78 ++++++++++++++++++++++++++++--------------- 1 file changed, 52 insertions(+), 26 deletions(-) diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c index 0400c5a7ba39..56596be70400 100644 --- a/drivers/nvdimm/pmem.c +++ b/drivers/nvdimm/pmem.c @@ -45,10 +45,27 @@ static struct nd_region *to_region(struct pmem_device *pmem) return to_nd_region(to_dev(pmem)->parent); } -static void hwpoison_clear(struct pmem_device *pmem, - phys_addr_t phys, unsigned int len) +static phys_addr_t to_phys(struct pmem_device *pmem, phys_addr_t offset) { + return (pmem->phys_addr + offset); +} + +static sector_t to_sect(struct pmem_device *pmem, phys_addr_t offset) +{ + return (offset - pmem->data_offset) >> SECTOR_SHIFT; +} + +static phys_addr_t to_offset(struct pmem_device *pmem, sector_t sector) +{ + return ((sector << SECTOR_SHIFT) + pmem->data_offset); +} + +static void pmem_clear_hwpoison(struct pmem_device *pmem, phys_addr_t offset, + unsigned int len) +{ + phys_addr_t phys = to_phys(pmem, offset); unsigned long pfn_start, pfn_end, pfn; + unsigned int blks = len >> SECTOR_SHIFT; /* only pmem in the linear map supports HWPoison */ if (is_vmalloc_addr(pmem->virt_addr)) @@ -67,35 +84,44 @@ static void hwpoison_clear(struct pmem_device *pmem, if (test_and_clear_pmem_poison(page)) clear_mce_nospec(pfn); } + + dev_dbg(to_dev(pmem), "%#llx clear %u sector%s\n", + (unsigned long long) to_sect(pmem, offset), blks, + blks > 1 ? "s" : ""); } -static blk_status_t pmem_clear_poison(struct pmem_device *pmem, +static void pmem_clear_bb(struct pmem_device *pmem, sector_t sector, long blks) +{ + if (blks == 0) + return; + badblocks_clear(&pmem->bb, sector, blks); + if (pmem->bb_state) + sysfs_notify_dirent(pmem->bb_state); +} + +static long __pmem_clear_poison(struct pmem_device *pmem, phys_addr_t offset, unsigned int len) { - struct device *dev = to_dev(pmem); - sector_t sector; - long cleared; - blk_status_t rc = BLK_STS_OK; - - sector = (offset - pmem->data_offset) / 512; - - cleared = nvdimm_clear_poison(dev, pmem->phys_addr + offset, len); - if (cleared < len) - rc = BLK_STS_IOERR; - if (cleared > 0 && cleared / 512) { - hwpoison_clear(pmem, pmem->phys_addr + offset, cleared); - cleared /= 512; - dev_dbg(dev, "%#llx clear %ld sector%s\n", - (unsigned long long) sector, cleared, - cleared > 1 ? "s" : ""); - badblocks_clear(&pmem->bb, sector, cleared); - if (pmem->bb_state) - sysfs_notify_dirent(pmem->bb_state); + phys_addr_t phys = to_phys(pmem, offset); + long cleared = nvdimm_clear_poison(to_dev(pmem), phys, len); + + if (cleared > 0) { + pmem_clear_hwpoison(pmem, offset, cleared); + arch_invalidate_pmem(pmem->virt_addr + offset, len); } + return cleared; +} - arch_invalidate_pmem(pmem->virt_addr + offset, len); +static blk_status_t pmem_clear_poison(struct pmem_device *pmem, + phys_addr_t offset, unsigned int len) +{ + long cleared = __pmem_clear_poison(pmem, offset, len); - return rc; + if (cleared < 0) + return BLK_STS_IOERR; + + pmem_clear_bb(pmem, to_sect(pmem, offset), cleared >> SECTOR_SHIFT); + return (cleared < len) ? BLK_STS_IOERR : BLK_STS_OK; } static void write_pmem(void *pmem_addr, struct page *page, @@ -143,7 +169,7 @@ static blk_status_t pmem_do_read(struct pmem_device *pmem, sector_t sector, unsigned int len) { blk_status_t rc; - phys_addr_t pmem_off = sector * 512 + pmem->data_offset; + phys_addr_t pmem_off = to_offset(pmem, sector); void *pmem_addr = pmem->virt_addr + pmem_off; if (unlikely(is_bad_pmem(&pmem->bb, sector, len))) @@ -158,7 +184,7 @@ static blk_status_t pmem_do_write(struct pmem_device *pmem, struct page *page, unsigned int page_off, sector_t sector, unsigned int len) { - phys_addr_t pmem_off = sector * 512 + pmem->data_offset; + phys_addr_t pmem_off = to_offset(pmem, sector); void *pmem_addr = pmem->virt_addr + pmem_off; if (unlikely(is_bad_pmem(&pmem->bb, sector, len))) {