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Sat, 19 Mar 2022 06:29:25 +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 Subject: [PATCH v6 5/6] pmem: refactor pmem_clear_poison() Date: Sat, 19 Mar 2022 00:28:32 -0600 Message-Id: <20220319062833.3136528-6-jane.chu@oracle.com> X-Mailer: git-send-email 2.18.4 In-Reply-To: <20220319062833.3136528-1-jane.chu@oracle.com> References: <20220319062833.3136528-1-jane.chu@oracle.com> X-ClientProxiedBy: BY5PR16CA0025.namprd16.prod.outlook.com (2603:10b6:a03:1a0::38) 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: ff731b21-4de3-4ac7-3e2e-08da0971d03a X-MS-TrafficTypeDiagnostic: CY4PR10MB1798:EE_ X-Microsoft-Antispam-PRVS: X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Signed-off-by: Jane Chu --- drivers/nvdimm/pmem.c | 81 ++++++++++++++++++++++++++++++------------- 1 file changed, 56 insertions(+), 25 deletions(-) diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c index 7cdaa279beca..18f357fbef69 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) / 512; +} + +static phys_addr_t to_offset(struct pmem_device *pmem, sector_t sector) +{ + return sector * 512 + pmem->data_offset; +} + +static void 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 / 512; /* only pmem in the linear map supports HWPoison */ if (is_vmalloc_addr(pmem->virt_addr)) @@ -67,33 +84,47 @@ 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, - phys_addr_t offset, unsigned int len) +static void clear_bb(struct pmem_device *pmem, sector_t sector, long blks) { - struct device *dev = to_dev(pmem); - sector_t sector; + badblocks_clear(&pmem->bb, sector, blks); + if (pmem->bb_state) + sysfs_notify_dirent(pmem->bb_state); +} + +static blk_status_t __pmem_clear_poison(struct pmem_device *pmem, + phys_addr_t offset, unsigned int len, + unsigned int *blks) +{ + phys_addr_t phys = to_phys(pmem, offset); 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); - } + blk_status_t rc; + cleared = nvdimm_clear_poison(to_dev(pmem), phys, len); + *blks = cleared / 512; + rc = (cleared < len) ? BLK_STS_IOERR : BLK_STS_OK; + if (cleared <= 0 || *blks == 0) + return rc; + + clear_hwpoison(pmem, offset, cleared); arch_invalidate_pmem(pmem->virt_addr + offset, len); + return rc; +} + +static blk_status_t pmem_clear_poison(struct pmem_device *pmem, + phys_addr_t offset, unsigned int len) +{ + unsigned int blks; + blk_status_t rc; + + rc = __pmem_clear_poison(pmem, offset, len, &blks); + if (blks > 0) + clear_bb(pmem, to_sect(pmem, offset), blks); return rc; } @@ -143,7 +174,7 @@ 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 +189,7 @@ 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))) {