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From: Dan Williams <dan.j.williams@intel.com>
To: linux-cxl@vger.kernel.org
Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com>,
	vishal.l.verma@intel.com, alison.schofield@intel.com,
	nvdimm@lists.linux.dev, Jonathan.Cameron@huawei.com,
	ira.weiny@intel.com, ben.widawsky@intel.com,
	vishal.l.verma@intel.com, alison.schofield@intel.com
Subject: [PATCH v3 01/28] libnvdimm/labels: Introduce getters for namespace label fields
Date: Tue, 24 Aug 2021 09:05:30 -0700	[thread overview]
Message-ID: <162982113002.1124374.15922077050771304490.stgit@dwillia2-desk3.amr.corp.intel.com> (raw)
In-Reply-To: <162982112370.1124374.2020303588105269226.stgit@dwillia2-desk3.amr.corp.intel.com>

In preparation for LIBNVDIMM to manage labels on CXL devices deploy
helpers that abstract the label type from the implementation. The CXL
label format is mostly similar to the EFI label format with concepts /
fields added, like dynamic region creation and label type guids, and
other concepts removed like BLK-mode and interleave-set-cookie ids.

In addition to nsl_get_* helpers there is the nsl_ref_name() helper that
returns a pointer to a label field rather than copying the data.

Where changes touch the old whitespace style, update to clang-format
expectations.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
 drivers/nvdimm/label.c          |   20 ++++++-----
 drivers/nvdimm/namespace_devs.c |   70 +++++++++++++++++++--------------------
 drivers/nvdimm/nd.h             |   66 +++++++++++++++++++++++++++++++++++++
 3 files changed, 110 insertions(+), 46 deletions(-)

diff --git a/drivers/nvdimm/label.c b/drivers/nvdimm/label.c
index 9251441fd8a3..b6d845cfb70e 100644
--- a/drivers/nvdimm/label.c
+++ b/drivers/nvdimm/label.c
@@ -350,14 +350,14 @@ static bool slot_valid(struct nvdimm_drvdata *ndd,
 		struct nd_namespace_label *nd_label, u32 slot)
 {
 	/* check that we are written where we expect to be written */
-	if (slot != __le32_to_cpu(nd_label->slot))
+	if (slot != nsl_get_slot(ndd, nd_label))
 		return false;
 
 	/* check checksum */
 	if (namespace_label_has(ndd, checksum)) {
 		u64 sum, sum_save;
 
-		sum_save = __le64_to_cpu(nd_label->checksum);
+		sum_save = nsl_get_checksum(ndd, nd_label);
 		nd_label->checksum = __cpu_to_le64(0);
 		sum = nd_fletcher64(nd_label, sizeof_namespace_label(ndd), 1);
 		nd_label->checksum = __cpu_to_le64(sum_save);
@@ -395,13 +395,13 @@ int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd)
 			continue;
 
 		memcpy(label_uuid, nd_label->uuid, NSLABEL_UUID_LEN);
-		flags = __le32_to_cpu(nd_label->flags);
+		flags = nsl_get_flags(ndd, nd_label);
 		if (test_bit(NDD_NOBLK, &nvdimm->flags))
 			flags &= ~NSLABEL_FLAG_LOCAL;
 		nd_label_gen_id(&label_id, label_uuid, flags);
 		res = nvdimm_allocate_dpa(ndd, &label_id,
-				__le64_to_cpu(nd_label->dpa),
-				__le64_to_cpu(nd_label->rawsize));
+					  nsl_get_dpa(ndd, nd_label),
+					  nsl_get_rawsize(ndd, nd_label));
 		nd_dbg_dpa(nd_region, ndd, res, "reserve\n");
 		if (!res)
 			return -EBUSY;
@@ -548,9 +548,9 @@ int nd_label_active_count(struct nvdimm_drvdata *ndd)
 		nd_label = to_label(ndd, slot);
 
 		if (!slot_valid(ndd, nd_label, slot)) {
-			u32 label_slot = __le32_to_cpu(nd_label->slot);
-			u64 size = __le64_to_cpu(nd_label->rawsize);
-			u64 dpa = __le64_to_cpu(nd_label->dpa);
+			u32 label_slot = nsl_get_slot(ndd, nd_label);
+			u64 size = nsl_get_rawsize(ndd, nd_label);
+			u64 dpa = nsl_get_dpa(ndd, nd_label);
 
 			dev_dbg(ndd->dev,
 				"slot%d invalid slot: %d dpa: %llx size: %llx\n",
@@ -879,9 +879,9 @@ static struct resource *to_resource(struct nvdimm_drvdata *ndd,
 	struct resource *res;
 
 	for_each_dpa_resource(ndd, res) {
-		if (res->start != __le64_to_cpu(nd_label->dpa))
+		if (res->start != nsl_get_dpa(ndd, nd_label))
 			continue;
-		if (resource_size(res) != __le64_to_cpu(nd_label->rawsize))
+		if (resource_size(res) != nsl_get_rawsize(ndd, nd_label))
 			continue;
 		return res;
 	}
diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c
index 2403b71b601e..94da804372bf 100644
--- a/drivers/nvdimm/namespace_devs.c
+++ b/drivers/nvdimm/namespace_devs.c
@@ -1235,7 +1235,7 @@ static int namespace_update_uuid(struct nd_region *nd_region,
 			if (!nd_label)
 				continue;
 			nd_label_gen_id(&label_id, nd_label->uuid,
-					__le32_to_cpu(nd_label->flags));
+					nsl_get_flags(ndd, nd_label));
 			if (strcmp(old_label_id.id, label_id.id) == 0)
 				set_bit(ND_LABEL_REAP, &label_ent->flags);
 		}
@@ -1851,9 +1851,9 @@ static bool has_uuid_at_pos(struct nd_region *nd_region, u8 *uuid,
 
 			if (!nd_label)
 				continue;
-			isetcookie = __le64_to_cpu(nd_label->isetcookie);
-			position = __le16_to_cpu(nd_label->position);
-			nlabel = __le16_to_cpu(nd_label->nlabel);
+			isetcookie = nsl_get_isetcookie(ndd, nd_label);
+			position = nsl_get_position(ndd, nd_label);
+			nlabel = nsl_get_nlabel(ndd, nd_label);
 
 			if (isetcookie != cookie)
 				continue;
@@ -1923,8 +1923,8 @@ static int select_pmem_id(struct nd_region *nd_region, u8 *pmem_id)
 		 */
 		hw_start = nd_mapping->start;
 		hw_end = hw_start + nd_mapping->size;
-		pmem_start = __le64_to_cpu(nd_label->dpa);
-		pmem_end = pmem_start + __le64_to_cpu(nd_label->rawsize);
+		pmem_start = nsl_get_dpa(ndd, nd_label);
+		pmem_end = pmem_start + nsl_get_rawsize(ndd, nd_label);
 		if (pmem_start >= hw_start && pmem_start < hw_end
 				&& pmem_end <= hw_end && pmem_end > hw_start)
 			/* pass */;
@@ -1947,14 +1947,16 @@ static int select_pmem_id(struct nd_region *nd_region, u8 *pmem_id)
  * @nd_label: target pmem namespace label to evaluate
  */
 static struct device *create_namespace_pmem(struct nd_region *nd_region,
-		struct nd_namespace_index *nsindex,
-		struct nd_namespace_label *nd_label)
+					    struct nd_mapping *nd_mapping,
+					    struct nd_namespace_label *nd_label)
 {
+	struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
+	struct nd_namespace_index *nsindex =
+		to_namespace_index(ndd, ndd->ns_current);
 	u64 cookie = nd_region_interleave_set_cookie(nd_region, nsindex);
 	u64 altcookie = nd_region_interleave_set_altcookie(nd_region);
 	struct nd_label_ent *label_ent;
 	struct nd_namespace_pmem *nspm;
-	struct nd_mapping *nd_mapping;
 	resource_size_t size = 0;
 	struct resource *res;
 	struct device *dev;
@@ -1966,10 +1968,10 @@ static struct device *create_namespace_pmem(struct nd_region *nd_region,
 		return ERR_PTR(-ENXIO);
 	}
 
-	if (__le64_to_cpu(nd_label->isetcookie) != cookie) {
+	if (nsl_get_isetcookie(ndd, nd_label) != cookie) {
 		dev_dbg(&nd_region->dev, "invalid cookie in label: %pUb\n",
 				nd_label->uuid);
-		if (__le64_to_cpu(nd_label->isetcookie) != altcookie)
+		if (nsl_get_isetcookie(ndd, nd_label) != altcookie)
 			return ERR_PTR(-EAGAIN);
 
 		dev_dbg(&nd_region->dev, "valid altcookie in label: %pUb\n",
@@ -2037,16 +2039,16 @@ static struct device *create_namespace_pmem(struct nd_region *nd_region,
 			continue;
 		}
 
-		size += __le64_to_cpu(label0->rawsize);
-		if (__le16_to_cpu(label0->position) != 0)
+		ndd = to_ndd(nd_mapping);
+		size += nsl_get_rawsize(ndd, label0);
+		if (nsl_get_position(ndd, label0) != 0)
 			continue;
 		WARN_ON(nspm->alt_name || nspm->uuid);
-		nspm->alt_name = kmemdup((void __force *) label0->name,
-				NSLABEL_NAME_LEN, GFP_KERNEL);
+		nspm->alt_name = kmemdup(nsl_ref_name(ndd, label0),
+					 NSLABEL_NAME_LEN, GFP_KERNEL);
 		nspm->uuid = kmemdup((void __force *) label0->uuid,
 				NSLABEL_UUID_LEN, GFP_KERNEL);
-		nspm->lbasize = __le64_to_cpu(label0->lbasize);
-		ndd = to_ndd(nd_mapping);
+		nspm->lbasize = nsl_get_lbasize(ndd, label0);
 		if (namespace_label_has(ndd, abstraction_guid))
 			nspm->nsio.common.claim_class
 				= to_nvdimm_cclass(&label0->abstraction_guid);
@@ -2237,7 +2239,7 @@ static int add_namespace_resource(struct nd_region *nd_region,
 		if (is_namespace_blk(devs[i])) {
 			res = nsblk_add_resource(nd_region, ndd,
 					to_nd_namespace_blk(devs[i]),
-					__le64_to_cpu(nd_label->dpa));
+					nsl_get_dpa(ndd, nd_label));
 			if (!res)
 				return -ENXIO;
 			nd_dbg_dpa(nd_region, ndd, res, "%d assign\n", count);
@@ -2276,7 +2278,7 @@ static struct device *create_namespace_blk(struct nd_region *nd_region,
 		if (nd_label->isetcookie != __cpu_to_le64(nd_set->cookie2)) {
 			dev_dbg(ndd->dev, "expect cookie %#llx got %#llx\n",
 					nd_set->cookie2,
-					__le64_to_cpu(nd_label->isetcookie));
+					nsl_get_isetcookie(ndd, nd_label));
 			return ERR_PTR(-EAGAIN);
 		}
 	}
@@ -2288,7 +2290,7 @@ static struct device *create_namespace_blk(struct nd_region *nd_region,
 	dev->type = &namespace_blk_device_type;
 	dev->parent = &nd_region->dev;
 	nsblk->id = -1;
-	nsblk->lbasize = __le64_to_cpu(nd_label->lbasize);
+	nsblk->lbasize = nsl_get_lbasize(ndd, nd_label);
 	nsblk->uuid = kmemdup(nd_label->uuid, NSLABEL_UUID_LEN,
 			GFP_KERNEL);
 	if (namespace_label_has(ndd, abstraction_guid))
@@ -2296,15 +2298,14 @@ static struct device *create_namespace_blk(struct nd_region *nd_region,
 			= to_nvdimm_cclass(&nd_label->abstraction_guid);
 	if (!nsblk->uuid)
 		goto blk_err;
-	memcpy(name, nd_label->name, NSLABEL_NAME_LEN);
+	nsl_get_name(ndd, nd_label, name);
 	if (name[0]) {
-		nsblk->alt_name = kmemdup(name, NSLABEL_NAME_LEN,
-				GFP_KERNEL);
+		nsblk->alt_name = kmemdup(name, NSLABEL_NAME_LEN, GFP_KERNEL);
 		if (!nsblk->alt_name)
 			goto blk_err;
 	}
 	res = nsblk_add_resource(nd_region, ndd, nsblk,
-			__le64_to_cpu(nd_label->dpa));
+			nsl_get_dpa(ndd, nd_label));
 	if (!res)
 		goto blk_err;
 	nd_dbg_dpa(nd_region, ndd, res, "%d: assign\n", count);
@@ -2345,6 +2346,7 @@ static struct device **scan_labels(struct nd_region *nd_region)
 	struct device *dev, **devs = NULL;
 	struct nd_label_ent *label_ent, *e;
 	struct nd_mapping *nd_mapping = &nd_region->mapping[0];
+	struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
 	resource_size_t map_end = nd_mapping->start + nd_mapping->size - 1;
 
 	/* "safe" because create_namespace_pmem() might list_move() label_ent */
@@ -2355,7 +2357,7 @@ static struct device **scan_labels(struct nd_region *nd_region)
 
 		if (!nd_label)
 			continue;
-		flags = __le32_to_cpu(nd_label->flags);
+		flags = nsl_get_flags(ndd, nd_label);
 		if (is_nd_blk(&nd_region->dev)
 				== !!(flags & NSLABEL_FLAG_LOCAL))
 			/* pass, region matches label type */;
@@ -2363,9 +2365,9 @@ static struct device **scan_labels(struct nd_region *nd_region)
 			continue;
 
 		/* skip labels that describe extents outside of the region */
-		if (__le64_to_cpu(nd_label->dpa) < nd_mapping->start ||
-		    __le64_to_cpu(nd_label->dpa) > map_end)
-				continue;
+		if (nsl_get_dpa(ndd, nd_label) < nd_mapping->start ||
+		    nsl_get_dpa(ndd, nd_label) > map_end)
+			continue;
 
 		i = add_namespace_resource(nd_region, nd_label, devs, count);
 		if (i < 0)
@@ -2381,13 +2383,9 @@ static struct device **scan_labels(struct nd_region *nd_region)
 
 		if (is_nd_blk(&nd_region->dev))
 			dev = create_namespace_blk(nd_region, nd_label, count);
-		else {
-			struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
-			struct nd_namespace_index *nsindex;
-
-			nsindex = to_namespace_index(ndd, ndd->ns_current);
-			dev = create_namespace_pmem(nd_region, nsindex, nd_label);
-		}
+		else
+			dev = create_namespace_pmem(nd_region, nd_mapping,
+						    nd_label);
 
 		if (IS_ERR(dev)) {
 			switch (PTR_ERR(dev)) {
@@ -2570,7 +2568,7 @@ static int init_active_labels(struct nd_region *nd_region)
 				break;
 			label = nd_label_active(ndd, j);
 			if (test_bit(NDD_NOBLK, &nvdimm->flags)) {
-				u32 flags = __le32_to_cpu(label->flags);
+				u32 flags = nsl_get_flags(ndd, label);
 
 				flags &= ~NSLABEL_FLAG_LOCAL;
 				label->flags = __cpu_to_le32(flags);
diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h
index 696b55556d4d..61f43f0edabf 100644
--- a/drivers/nvdimm/nd.h
+++ b/drivers/nvdimm/nd.h
@@ -35,6 +35,72 @@ struct nvdimm_drvdata {
 	struct kref kref;
 };
 
+static inline const u8 *nsl_ref_name(struct nvdimm_drvdata *ndd,
+				     struct nd_namespace_label *nd_label)
+{
+	return nd_label->name;
+}
+
+static inline u8 *nsl_get_name(struct nvdimm_drvdata *ndd,
+			       struct nd_namespace_label *nd_label, u8 *name)
+{
+	return memcpy(name, nd_label->name, NSLABEL_NAME_LEN);
+}
+
+static inline u32 nsl_get_slot(struct nvdimm_drvdata *ndd,
+			       struct nd_namespace_label *nd_label)
+{
+	return __le32_to_cpu(nd_label->slot);
+}
+
+static inline u64 nsl_get_checksum(struct nvdimm_drvdata *ndd,
+				   struct nd_namespace_label *nd_label)
+{
+	return __le64_to_cpu(nd_label->checksum);
+}
+
+static inline u32 nsl_get_flags(struct nvdimm_drvdata *ndd,
+				struct nd_namespace_label *nd_label)
+{
+	return __le32_to_cpu(nd_label->flags);
+}
+
+static inline u64 nsl_get_dpa(struct nvdimm_drvdata *ndd,
+			      struct nd_namespace_label *nd_label)
+{
+	return __le64_to_cpu(nd_label->dpa);
+}
+
+static inline u64 nsl_get_rawsize(struct nvdimm_drvdata *ndd,
+				  struct nd_namespace_label *nd_label)
+{
+	return __le64_to_cpu(nd_label->rawsize);
+}
+
+static inline u64 nsl_get_isetcookie(struct nvdimm_drvdata *ndd,
+				     struct nd_namespace_label *nd_label)
+{
+	return __le64_to_cpu(nd_label->isetcookie);
+}
+
+static inline u16 nsl_get_position(struct nvdimm_drvdata *ndd,
+				   struct nd_namespace_label *nd_label)
+{
+	return __le16_to_cpu(nd_label->position);
+}
+
+static inline u16 nsl_get_nlabel(struct nvdimm_drvdata *ndd,
+				 struct nd_namespace_label *nd_label)
+{
+	return __le16_to_cpu(nd_label->nlabel);
+}
+
+static inline u64 nsl_get_lbasize(struct nvdimm_drvdata *ndd,
+				  struct nd_namespace_label *nd_label)
+{
+	return __le64_to_cpu(nd_label->lbasize);
+}
+
 struct nd_region_data {
 	int ns_count;
 	int ns_active;


  reply	other threads:[~2021-08-24 16:07 UTC|newest]

Thread overview: 64+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-24 16:05 [PATCH v3 00/28] cxl_test: Enable CXL Topology and UAPI regression tests Dan Williams
2021-08-24 16:05 ` Dan Williams [this message]
2021-08-24 16:05 ` [PATCH v3 02/28] libnvdimm/labels: Add isetcookie validation helper Dan Williams
2021-08-24 16:05 ` [PATCH v3 03/28] libnvdimm/labels: Introduce label setter helpers Dan Williams
2021-08-24 16:05 ` [PATCH v3 04/28] libnvdimm/labels: Add a checksum calculation helper Dan Williams
2021-08-24 16:05 ` [PATCH v3 05/28] libnvdimm/labels: Add blk isetcookie set / validation helpers Dan Williams
2021-08-24 16:05 ` [PATCH v3 06/28] libnvdimm/labels: Add blk special cases for nlabel and position helpers Dan Williams
2021-08-24 16:06 ` [PATCH v3 07/28] libnvdimm/labels: Add type-guid helpers Dan Williams
2021-08-24 16:06 ` [PATCH v3 08/28] libnvdimm/labels: Add claim class helpers Dan Williams
2021-08-24 16:06 ` [PATCH v3 09/28] libnvdimm/labels: Add address-abstraction uuid definitions Dan Williams
2021-08-24 16:06 ` [PATCH v3 10/28] libnvdimm/labels: Add uuid helpers Dan Williams
2021-08-24 16:06 ` [PATCH v3 11/28] libnvdimm/label: Add a helper for nlabel validation Dan Williams
2021-09-02 16:37   ` Jonathan Cameron
2021-08-24 16:06 ` [PATCH v3 12/28] libnvdimm/labels: Introduce the concept of multi-range namespace labels Dan Williams
2021-09-02 16:43   ` Jonathan Cameron
2021-08-24 16:06 ` [PATCH v3 13/28] libnvdimm/label: Define CXL region labels Dan Williams
2021-09-02 16:36   ` Jonathan Cameron
2021-09-02 16:41     ` Jonathan Cameron
2021-09-03  3:58       ` Dan Williams
2021-08-24 16:06 ` [PATCH v3 14/28] libnvdimm/labels: Introduce CXL labels Dan Williams
2021-09-03 17:00   ` Dan Williams
2021-08-24 16:06 ` [PATCH v3 15/28] cxl/pci: Make 'struct cxl_mem' device type generic Dan Williams
2021-09-02 16:55   ` Jonathan Cameron
2021-09-02 17:34     ` Dan Williams
2021-08-24 16:06 ` [PATCH v3 16/28] cxl/mbox: Introduce the mbox_send operation Dan Williams
2021-09-02 17:07   ` Jonathan Cameron
2021-08-24 16:06 ` [PATCH v3 17/28] cxl/mbox: Move mailbox and other non-PCI specific infrastructure to the core Dan Williams
2021-09-02 17:56   ` Jonathan Cameron
2021-09-02 18:56     ` Dan Williams
2021-08-24 16:07 ` [PATCH v3 18/28] cxl/pci: Use module_pci_driver Dan Williams
2021-09-02 17:58   ` Jonathan Cameron
2021-08-24 16:07 ` [PATCH v3 19/28] cxl/mbox: Convert 'enabled_cmds' to DECLARE_BITMAP Dan Williams
2021-09-02 17:59   ` Jonathan Cameron
2021-08-24 16:07 ` [PATCH v3 20/28] cxl/mbox: Add exclusive kernel command support Dan Williams
2021-09-02 18:09   ` Jonathan Cameron
2021-09-03 20:47     ` Dan Williams
2021-08-24 16:07 ` [PATCH v3 21/28] cxl/pmem: Translate NVDIMM label commands to CXL label commands Dan Williams
2021-09-02 18:22   ` Jonathan Cameron
2021-09-03 21:09     ` Dan Williams
2021-08-24 16:07 ` [PATCH v3 22/28] cxl/pmem: Add support for multiple nvdimm-bridge objects Dan Williams
2021-09-03 11:15   ` Jonathan Cameron
2021-08-24 16:07 ` [PATCH v3 23/28] cxl/acpi: Do not add DSDT disabled ACPI0016 host bridge ports Dan Williams
2021-09-02 18:30   ` Jonathan Cameron
2021-09-03 17:51     ` Dan Williams
2021-08-24 16:07 ` [PATCH v3 24/28] tools/testing/cxl: Introduce a mocked-up CXL port hierarchy Dan Williams
2021-09-03 12:52   ` Jonathan Cameron
2021-09-03 21:49     ` Dan Williams
2021-09-06  8:32       ` Jonathan Cameron
2021-09-07 15:57         ` Dan Williams
2021-08-24 16:07 ` [PATCH v3 25/28] cxl/bus: Populate the target list at decoder create Dan Williams
2021-09-03 12:59   ` Jonathan Cameron
2021-09-03 22:43     ` Dan Williams
2021-09-06  8:52       ` Jonathan Cameron
2021-08-24 16:07 ` [PATCH v3 26/28] cxl/mbox: Move command definitions to common location Dan Williams
2021-09-03 13:04   ` Jonathan Cameron
2021-08-24 16:07 ` [PATCH v3 27/28] tools/testing/cxl: Introduce a mock memory device + driver Dan Williams
2021-09-03 13:21   ` Jonathan Cameron
2021-09-03 23:33     ` Dan Williams
2021-09-06  8:57       ` Jonathan Cameron
2021-08-24 16:07 ` [PATCH v3 28/28] cxl/core: Split decoder setup into alloc + add Dan Williams
2021-09-03 13:33   ` Jonathan Cameron
2021-09-03 16:26     ` Dan Williams
2021-09-03 18:01       ` Jonathan Cameron
2021-09-04  0:27         ` Dan Williams

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