From c2c292f45029a6850cd14c7c2fa4fc479b8f74aa Mon Sep 17 00:00:00 2001 From: Uma Krishnan Date: Wed, 21 Jun 2017 21:14:30 -0500 Subject: scsi: cxlflash: Handle AFU sync failures AFU sync operations are not currently evaluated for failure. This is acceptable for paths where there is not a dependency on the AFU being consistent with the host. Examples include link reset events and LUN cleanup operations. On paths where there is a dependency, such as a LUN open, a sync failure should be acted upon. In the event of AFU sync failures, either log or cleanup as appropriate for operations that are dependent on a successful sync completion. Update documentation to reflect behavior in the event of an AFU sync failure. Signed-off-by: Uma Krishnan Acked-by: Matthew R. Ochs Signed-off-by: Martin K. Petersen --- drivers/scsi/cxlflash/superpipe.c | 34 +++++++++++++++++++++++++++++++--- 1 file changed, 31 insertions(+), 3 deletions(-) (limited to 'drivers/scsi/cxlflash/superpipe.c') diff --git a/drivers/scsi/cxlflash/superpipe.c b/drivers/scsi/cxlflash/superpipe.c index fe9f17a6268b..ad0f9968ccfb 100644 --- a/drivers/scsi/cxlflash/superpipe.c +++ b/drivers/scsi/cxlflash/superpipe.c @@ -56,6 +56,19 @@ static void marshal_det_to_rele(struct dk_cxlflash_detach *detach, release->context_id = detach->context_id; } +/** + * marshal_udir_to_rele() - translate udirect to release structure + * @udirect: Source structure from which to translate/copy. + * @release: Destination structure for the translate/copy. + */ +static void marshal_udir_to_rele(struct dk_cxlflash_udirect *udirect, + struct dk_cxlflash_release *release) +{ + release->hdr = udirect->hdr; + release->context_id = udirect->context_id; + release->rsrc_handle = udirect->rsrc_handle; +} + /** * cxlflash_free_errpage() - frees resources associated with global error page */ @@ -622,6 +635,7 @@ int _cxlflash_disk_release(struct scsi_device *sdev, res_hndl_t rhndl = release->rsrc_handle; int rc = 0; + int rcr = 0; u64 ctxid = DECODE_CTXID(release->context_id), rctxid = release->context_id; @@ -686,8 +700,12 @@ int _cxlflash_disk_release(struct scsi_device *sdev, rhte_f1->dw = 0; dma_wmb(); /* Make RHT entry bottom-half clearing visible */ - if (!ctxi->err_recovery_active) - cxlflash_afu_sync(afu, ctxid, rhndl, AFU_HW_SYNC); + if (!ctxi->err_recovery_active) { + rcr = cxlflash_afu_sync(afu, ctxid, rhndl, AFU_HW_SYNC); + if (unlikely(rcr)) + dev_dbg(dev, "%s: AFU sync failed rc=%d\n", + __func__, rcr); + } break; default: WARN(1, "Unsupported LUN mode!"); @@ -1929,6 +1947,7 @@ static int cxlflash_disk_direct_open(struct scsi_device *sdev, void *arg) struct afu *afu = cfg->afu; struct llun_info *lli = sdev->hostdata; struct glun_info *gli = lli->parent; + struct dk_cxlflash_release rel = { { 0 }, 0 }; struct dk_cxlflash_udirect *pphys = (struct dk_cxlflash_udirect *)arg; @@ -1970,13 +1989,18 @@ static int cxlflash_disk_direct_open(struct scsi_device *sdev, void *arg) rsrc_handle = (rhte - ctxi->rht_start); rht_format1(rhte, lli->lun_id[sdev->channel], ctxi->rht_perms, port); - cxlflash_afu_sync(afu, ctxid, rsrc_handle, AFU_LW_SYNC); last_lba = gli->max_lba; pphys->hdr.return_flags = 0; pphys->last_lba = last_lba; pphys->rsrc_handle = rsrc_handle; + rc = cxlflash_afu_sync(afu, ctxid, rsrc_handle, AFU_LW_SYNC); + if (unlikely(rc)) { + dev_dbg(dev, "%s: AFU sync failed rc=%d\n", __func__, rc); + goto err2; + } + out: if (likely(ctxi)) put_context(ctxi); @@ -1984,6 +2008,10 @@ out: __func__, rsrc_handle, rc, last_lba); return rc; +err2: + marshal_udir_to_rele(pphys, &rel); + _cxlflash_disk_release(sdev, ctxi, &rel); + goto out; err1: cxlflash_lun_detach(gli); goto out; -- cgit v1.2.3