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Tue, 02 Jun 2020 07:49:35 +0000 Received: from b03ledav006.gho.boulder.ibm.com (b03ledav006.gho.boulder.ibm.com [9.17.130.237]) by b03cxnp07029.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 0527nXQe39191032 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 2 Jun 2020 07:49:33 GMT Received: from b03ledav006.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id CE12CC6057; Tue, 2 Jun 2020 07:49:33 +0000 (GMT) Received: from b03ledav006.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id CE5E2C6055; Tue, 2 Jun 2020 07:49:29 +0000 (GMT) Received: from skywalker.ibmuc.com (unknown [9.199.34.130]) by b03ledav006.gho.boulder.ibm.com (Postfix) with ESMTP; Tue, 2 Jun 2020 07:49:29 +0000 (GMT) From: "Aneesh Kumar K.V" To: linuxppc-dev@lists.ozlabs.org, mpe@ellerman.id.au, linux-nvdimm@lists.01.org, dan.j.williams@intel.com Subject: [RFC PATCH v2 4/5] powerpc/papr_scm: disable MAP_SYNC for newer hardware Date: Tue, 2 Jun 2020 13:19:08 +0530 Message-Id: <20200602074909.36738-4-aneesh.kumar@linux.ibm.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200602074909.36738-1-aneesh.kumar@linux.ibm.com> References: <20200602074909.36738-1-aneesh.kumar@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216, 18.0.687 definitions=2020-06-02_08:2020-06-01, 2020-06-02 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 bulkscore=0 spamscore=0 impostorscore=0 adultscore=0 mlxlogscore=999 suspectscore=0 cotscore=-2147483648 clxscore=1015 priorityscore=1501 malwarescore=0 mlxscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2006020047 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jan Kara , Jeff Moyer , msuchanek@suse.de, oohall@gmail.com, "Aneesh Kumar K.V" Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Signed-off-by: Aneesh Kumar K.V --- arch/powerpc/platforms/pseries/papr_scm.c | 17 ++++++++++++++++- drivers/nvdimm/of_pmem.c | 7 +++++++ 2 files changed, 23 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/platforms/pseries/papr_scm.c b/arch/powerpc/platforms/pseries/papr_scm.c index f35592423380..30474d4cd109 100644 --- a/arch/powerpc/platforms/pseries/papr_scm.c +++ b/arch/powerpc/platforms/pseries/papr_scm.c @@ -30,6 +30,7 @@ struct papr_scm_priv { uint64_t block_size; int metadata_size; bool is_volatile; + bool disable_map_sync; uint64_t bound_addr; @@ -340,11 +341,18 @@ static int papr_scm_nvdimm_init(struct papr_scm_priv *p) ndr_desc.mapping = &mapping; ndr_desc.num_mappings = 1; ndr_desc.nd_set = &p->nd_set; + set_bit(ND_REGION_SYNC_ENABLED, &ndr_desc.flags); if (p->is_volatile) p->region = nvdimm_volatile_region_create(p->bus, &ndr_desc); else { set_bit(ND_REGION_PERSIST_MEMCTRL, &ndr_desc.flags); + /* + * for a persistent region, check if the platform needs to + * force MAP_SYNC disable. + */ + if (p->disable_map_sync) + clear_bit(ND_REGION_SYNC_ENABLED, &ndr_desc.flags); p->region = nvdimm_pmem_region_create(p->bus, &ndr_desc); } if (!p->region) { @@ -365,7 +373,7 @@ err: nvdimm_bus_unregister(p->bus); static int papr_scm_probe(struct platform_device *pdev) { - struct device_node *dn = pdev->dev.of_node; + struct device_node *dn; u32 drc_index, metadata_size; u64 blocks, block_size; struct papr_scm_priv *p; @@ -373,6 +381,10 @@ static int papr_scm_probe(struct platform_device *pdev) u64 uuid[2]; int rc; + dn = dev_of_node(&pdev->dev); + if (!dn) + return -ENXIO; + /* check we have all the required DT properties */ if (of_property_read_u32(dn, "ibm,my-drc-index", &drc_index)) { dev_err(&pdev->dev, "%pOF: missing drc-index!\n", dn); @@ -402,6 +414,9 @@ static int papr_scm_probe(struct platform_device *pdev) /* optional DT properties */ of_property_read_u32(dn, "ibm,metadata-size", &metadata_size); + if (of_device_is_compatible(dn, "ibm,pmemory-v2")) + p->disable_map_sync = true; + p->dn = dn; p->drc_index = drc_index; p->block_size = block_size; diff --git a/drivers/nvdimm/of_pmem.c b/drivers/nvdimm/of_pmem.c index 6826a274a1f1..a6cc3488e552 100644 --- a/drivers/nvdimm/of_pmem.c +++ b/drivers/nvdimm/of_pmem.c @@ -59,12 +59,19 @@ static int of_pmem_region_probe(struct platform_device *pdev) ndr_desc.res = &pdev->resource[i]; ndr_desc.of_node = np; set_bit(ND_REGION_PAGEMAP, &ndr_desc.flags); + set_bit(ND_REGION_SYNC_ENABLED, &ndr_desc.flags); if (is_volatile) region = nvdimm_volatile_region_create(bus, &ndr_desc); else { set_bit(ND_REGION_PERSIST_MEMCTRL, &ndr_desc.flags); + /* + * for a persistent region, check for newer device + */ + if (of_device_is_compatible(np, "pmem-region-v2")) + clear_bit(ND_REGION_SYNC_ENABLED, &ndr_desc.flags); region = nvdimm_pmem_region_create(bus, &ndr_desc); + } if (!region) -- 2.26.2