[ndctl 1/5] libndctl: test enablement for non-nfit devices

Santosh Sivaraj
2020-12-22T04:25:34Z

Unify adding dimms for papr and nfit families, this will help in adding
all attributes needed for the unit tests too. We don't fail adding a dimm
if some of the dimm attributes are missing, so this will work fine on PAPR
platforms where most dimm attributes are provided.

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 ad521d3..5f09628 100644
--- a/ndctl/lib/libndctl.c
+++ b/ndctl/lib/libndctl.c
@@ -1655,41 +1655,9 @@ 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];
@@ -1703,7 +1671,7 @@ 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];

@@ -1718,68 +1686,74 @@ 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;
@@ -1801,7 +1775,8 @@ 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
@@ -1875,13 +1850,12 @@ 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 */
@@ -2540,13 +2514,12 @@ 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)