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* [ndctl V5 1/4] libndctl: Unify adding dimms for papr and nfit families
@ 2021-05-13  6:12 Santosh Sivaraj
  2021-05-13  6:12 ` [ndctl V5 2/4] test: Don't skip tests if nfit modules are missing Santosh Sivaraj
                   ` (2 more replies)
  0 siblings, 3 replies; 5+ messages in thread
From: Santosh Sivaraj @ 2021-05-13  6:12 UTC (permalink / raw)
  To: Linux NVDIMM; +Cc: Shivaprasad G Bhat, Harish Sriram, Aneesh Kumar K.V

In preparation for enabling tests on non-nfit devices, unify both, already very
similar, functions into one. This will help in adding all attributes needed for
the unit tests. Since the function doesn't fail if some of the dimm attributes
are missing, this will work fine on PAPR platforms though only part of the DIMM
attributes are provided (This doesn't mean that all of the DIMM attributes can
be missing).

Signed-off-by: Santosh Sivaraj <santosh@fossix.org>
---
 ndctl/lib/libndctl.c | 103 ++++++++++++++++---------------------------
 1 file changed, 38 insertions(+), 65 deletions(-)

diff --git a/ndctl/lib/libndctl.c b/ndctl/lib/libndctl.c
index 36fb6fe..26b9317 100644
--- a/ndctl/lib/libndctl.c
+++ b/ndctl/lib/libndctl.c
@@ -1646,41 +1646,9 @@ static int ndctl_bind(struct ndctl_ctx *ctx, struct kmod_module *module,
 static int ndctl_unbind(struct ndctl_ctx *ctx, const char *devpath);
 static struct kmod_module *to_module(struct ndctl_ctx *ctx, const char *alias);
 
-static int add_papr_dimm(struct ndctl_dimm *dimm, const char *dimm_base)
-{
-	int rc = -ENODEV;
-	char buf[SYSFS_ATTR_SIZE];
-	struct ndctl_ctx *ctx = dimm->bus->ctx;
-	char *path = calloc(1, strlen(dimm_base) + 100);
-	const char * const devname = ndctl_dimm_get_devname(dimm);
-
-	dbg(ctx, "%s: Probing of_pmem dimm at %s\n", devname, dimm_base);
-
-	if (!path)
-		return -ENOMEM;
-
-	/* construct path to the papr compatible dimm flags file */
-	sprintf(path, "%s/papr/flags", dimm_base);
-
-	if (ndctl_bus_is_papr_scm(dimm->bus) &&
-	    sysfs_read_attr(ctx, path, buf) == 0) {
-
-		dbg(ctx, "%s: Adding papr-scm dimm flags:\"%s\"\n", devname, buf);
-		dimm->cmd_family = NVDIMM_FAMILY_PAPR;
-
-		/* Parse dimm flags */
-		parse_papr_flags(dimm, buf);
-
-		/* Allocate monitor mode fd */
-		dimm->health_eventfd = open(path, O_RDONLY|O_CLOEXEC);
-		rc = 0;
-	}
-
-	free(path);
-	return rc;
-}
-
-static int add_nfit_dimm(struct ndctl_dimm *dimm, const char *dimm_base)
+static int populate_dimm_attributes(struct ndctl_dimm *dimm,
+				    const char *dimm_base,
+				    const char *bus_prefix)
 {
 	int i, rc = -1;
 	char buf[SYSFS_ATTR_SIZE];
@@ -1694,7 +1662,7 @@ static int add_nfit_dimm(struct ndctl_dimm *dimm, const char *dimm_base)
 	 * 'unique_id' may not be available on older kernels, so don't
 	 * fail if the read fails.
 	 */
-	sprintf(path, "%s/nfit/id", dimm_base);
+	sprintf(path, "%s/%s/id", dimm_base, bus_prefix);
 	if (sysfs_read_attr(ctx, path, buf) == 0) {
 		unsigned int b[9];
 
@@ -1709,68 +1677,74 @@ static int add_nfit_dimm(struct ndctl_dimm *dimm, const char *dimm_base)
 		}
 	}
 
-	sprintf(path, "%s/nfit/handle", dimm_base);
+	sprintf(path, "%s/%s/handle", dimm_base, bus_prefix);
 	if (sysfs_read_attr(ctx, path, buf) < 0)
 		goto err_read;
 	dimm->handle = strtoul(buf, NULL, 0);
 
-	sprintf(path, "%s/nfit/phys_id", dimm_base);
+	sprintf(path, "%s/%s/phys_id", dimm_base, bus_prefix);
 	if (sysfs_read_attr(ctx, path, buf) < 0)
 		goto err_read;
 	dimm->phys_id = strtoul(buf, NULL, 0);
 
-	sprintf(path, "%s/nfit/serial", dimm_base);
+	sprintf(path, "%s/%s/serial", dimm_base, bus_prefix);
 	if (sysfs_read_attr(ctx, path, buf) == 0)
 		dimm->serial = strtoul(buf, NULL, 0);
 
-	sprintf(path, "%s/nfit/vendor", dimm_base);
+	sprintf(path, "%s/%s/vendor", dimm_base, bus_prefix);
 	if (sysfs_read_attr(ctx, path, buf) == 0)
 		dimm->vendor_id = strtoul(buf, NULL, 0);
 
-	sprintf(path, "%s/nfit/device", dimm_base);
+	sprintf(path, "%s/%s/device", dimm_base, bus_prefix);
 	if (sysfs_read_attr(ctx, path, buf) == 0)
 		dimm->device_id = strtoul(buf, NULL, 0);
 
-	sprintf(path, "%s/nfit/rev_id", dimm_base);
+	sprintf(path, "%s/%s/rev_id", dimm_base, bus_prefix);
 	if (sysfs_read_attr(ctx, path, buf) == 0)
 		dimm->revision_id = strtoul(buf, NULL, 0);
 
-	sprintf(path, "%s/nfit/dirty_shutdown", dimm_base);
+	sprintf(path, "%s/%s/dirty_shutdown", dimm_base, bus_prefix);
 	if (sysfs_read_attr(ctx, path, buf) == 0)
 		dimm->dirty_shutdown = strtoll(buf, NULL, 0);
 
-	sprintf(path, "%s/nfit/subsystem_vendor", dimm_base);
+	sprintf(path, "%s/%s/subsystem_vendor", dimm_base, bus_prefix);
 	if (sysfs_read_attr(ctx, path, buf) == 0)
 		dimm->subsystem_vendor_id = strtoul(buf, NULL, 0);
 
-	sprintf(path, "%s/nfit/subsystem_device", dimm_base);
+	sprintf(path, "%s/%s/subsystem_device", dimm_base, bus_prefix);
 	if (sysfs_read_attr(ctx, path, buf) == 0)
 		dimm->subsystem_device_id = strtoul(buf, NULL, 0);
 
-	sprintf(path, "%s/nfit/subsystem_rev_id", dimm_base);
+	sprintf(path, "%s/%s/subsystem_rev_id", dimm_base, bus_prefix);
 	if (sysfs_read_attr(ctx, path, buf) == 0)
 		dimm->subsystem_revision_id = strtoul(buf, NULL, 0);
 
-	sprintf(path, "%s/nfit/family", dimm_base);
+	sprintf(path, "%s/%s/family", dimm_base, bus_prefix);
 	if (sysfs_read_attr(ctx, path, buf) == 0)
 		dimm->cmd_family = strtoul(buf, NULL, 0);
 
-	sprintf(path, "%s/nfit/dsm_mask", dimm_base);
+	sprintf(path, "%s/%s/dsm_mask", dimm_base, bus_prefix);
 	if (sysfs_read_attr(ctx, path, buf) == 0)
 		dimm->nfit_dsm_mask = strtoul(buf, NULL, 0);
 
-	sprintf(path, "%s/nfit/format", dimm_base);
+	sprintf(path, "%s/%s/format", dimm_base, bus_prefix);
 	if (sysfs_read_attr(ctx, path, buf) == 0)
 		dimm->format[0] = strtoul(buf, NULL, 0);
 	for (i = 1; i < dimm->formats; i++) {
-		sprintf(path, "%s/nfit/format%d", dimm_base, i);
+		sprintf(path, "%s/%s/format%d", dimm_base, bus_prefix, i);
 		if (sysfs_read_attr(ctx, path, buf) == 0)
 			dimm->format[i] = strtoul(buf, NULL, 0);
 	}
 
-	sprintf(path, "%s/nfit/flags", dimm_base);
-	if (sysfs_read_attr(ctx, path, buf) == 0)
-		parse_nfit_mem_flags(dimm, buf);
+	sprintf(path, "%s/%s/flags", dimm_base, bus_prefix);
+	if (sysfs_read_attr(ctx, path, buf) == 0) {
+		if (ndctl_bus_has_nfit(dimm->bus))
+			parse_nfit_mem_flags(dimm, buf);
+		else if (ndctl_bus_is_papr_scm(dimm->bus)) {
+			dimm->cmd_family = NVDIMM_FAMILY_PAPR;
+			parse_papr_flags(dimm, buf);
+		}
+	}
 
 	dimm->health_eventfd = open(path, O_RDONLY|O_CLOEXEC);
 	rc = 0;
@@ -1792,7 +1766,8 @@ static void *add_dimm(void *parent, int id, const char *dimm_base)
 	if (!path)
 		return NULL;
 
-	sprintf(path, "%s/nfit/formats", dimm_base);
+	sprintf(path, "%s/%s/formats", dimm_base,
+		ndctl_bus_has_nfit(bus) ? "nfit" : "papr");
 	if (sysfs_read_attr(ctx, path, buf) < 0)
 		formats = 1;
 	else
@@ -1866,13 +1841,12 @@ static void *add_dimm(void *parent, int id, const char *dimm_base)
 	else
 		dimm->fwa_result = fwa_result_to_result(buf);
 
+	dimm->formats = formats;
 	/* Check if the given dimm supports nfit */
 	if (ndctl_bus_has_nfit(bus)) {
-		dimm->formats = formats;
-		rc = add_nfit_dimm(dimm, dimm_base);
-	} else if (ndctl_bus_has_of_node(bus)) {
-		rc = add_papr_dimm(dimm, dimm_base);
-	}
+		rc = populate_dimm_attributes(dimm, dimm_base, "nfit");
+	} else if (ndctl_bus_has_of_node(bus))
+		rc = populate_dimm_attributes(dimm, dimm_base, "papr");
 
 	if (rc == -ENODEV) {
 		/* Unprobed dimm with no family */
@@ -2531,13 +2505,12 @@ static void *add_region(void *parent, int id, const char *region_base)
 		goto err_read;
 	region->num_mappings = strtoul(buf, NULL, 0);
 
-	sprintf(path, "%s/nfit/range_index", region_base);
-	if (ndctl_bus_has_nfit(bus)) {
-		if (sysfs_read_attr(ctx, path, buf) < 0)
-			goto err_read;
-		region->range_index = strtoul(buf, NULL, 0);
-	} else
+	sprintf(path, "%s/%s/range_index", region_base,
+		ndctl_bus_has_nfit(bus) ? "nfit": "papr");
+	if (sysfs_read_attr(ctx, path, buf) < 0)
 		region->range_index = -1;
+	else
+		region->range_index = strtoul(buf, NULL, 0);
 
 	sprintf(path, "%s/read_only", region_base);
 	if (sysfs_read_attr(ctx, path, buf) < 0)
-- 
2.31.1
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^ permalink raw reply	[flat|nested] 5+ messages in thread

end of thread, other threads:[~2021-05-13 18:17 UTC | newest]

Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-05-13  6:12 [ndctl V5 1/4] libndctl: Unify adding dimms for papr and nfit families Santosh Sivaraj
2021-05-13  6:12 ` [ndctl V5 2/4] test: Don't skip tests if nfit modules are missing Santosh Sivaraj
2021-05-13  6:12 ` [ndctl V5 3/4] papr: Add support to parse save_fail flag for dimm Santosh Sivaraj
2021-05-13  6:12 ` [ndctl V5 4/4] Use page size as alignment value Santosh Sivaraj
2021-05-13 18:17   ` Verma, Vishal L

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