On 7/12/21 11:01 PM, Vaibhav Jain wrote:
Implements support for ndctl inject-smart command by providing an
implementation of 'smart_inject*' dimm-ops callbacks. Presently only
support for injecting unsafe-shutdown and fatal-health states is
available.
The patch also introduce various PAPR PDSM structures that are used to
communicate the inject-smart errors to the papr_scm kernel
module. This is done via SMART_INJECT PDSM which sends a payload of
type 'struct nd_papr_pdsm_smart_inject'.
The patch depends on the kernel PAPR PDSM implementation for
PDSM_SMART_INJECT posted at [1].
[1] :
https://lore.kernel.org/nvdimm/20210712084819.1150350-1-vaib...@linux.ibm.com
Signed-off-by: Shivaprasad G Bhat <sb...@linux.ibm.com>
Signed-off-by: Vaibhav Jain <vaib...@linux.ibm.com>
---
ndctl/lib/papr.c | 61 +++++++++++++++++++++++++++++++++++++++++++
ndctl/lib/papr_pdsm.h | 17 ++++++++++++
2 files changed, 78 insertions(+)
diff --git a/ndctl/lib/papr.c b/ndctl/lib/papr.c
index 42ff200dc588..b797e1e5fe8b 100644
--- a/ndctl/lib/papr.c
+++ b/ndctl/lib/papr.c
@@ -221,6 +221,41 @@ static unsigned int papr_smart_get_shutdown_state(struct
ndctl_cmd *cmd)
return health.dimm_bad_shutdown;
}
+static int papr_smart_inject_supported(struct ndctl_dimm *dimm)
+{
+ if (!ndctl_dimm_is_cmd_supported(dimm, ND_CMD_CALL))
+ return -EOPNOTSUPP;
+
+ if (!test_dimm_dsm(dimm, PAPR_PDSM_SMART_INJECT))
+ return -EIO;
+
+ return ND_SMART_INJECT_HEALTH_STATE | ND_SMART_INJECT_UNCLEAN_SHUTDOWN;
+}
+
with ndtest PAPR_SCM_FAMILY driver, should we test more inject types? if
so should the supported inject types be fetched from the driver?
+static int papr_smart_inject_valid(struct ndctl_cmd *cmd)
+{
+ if (cmd->type != ND_CMD_CALL ||
+ to_pdsm(cmd)->cmd_status != 0 ||
+ to_pdsm_cmd(cmd) != PAPR_PDSM_SMART_INJECT)
+ return -EINVAL;
+
+ return 0;
+}
+
+static struct ndctl_cmd *papr_new_smart_inject(struct ndctl_dimm *dimm)
+{
+ struct ndctl_cmd *cmd;
+
+ cmd = allocate_cmd(dimm, PAPR_PDSM_SMART_INJECT,
+ sizeof(struct nd_papr_pdsm_smart_inject));
+ if (!cmd)
+ return NULL;
+ /* Set the input payload size */
+ to_ndcmd(cmd)->nd_size_in = ND_PDSM_HDR_SIZE +
+ sizeof(struct nd_papr_pdsm_smart_inject);
+ return cmd;
+}
+
static unsigned int papr_smart_get_life_used(struct ndctl_cmd *cmd)
{
struct nd_papr_pdsm_health health;
@@ -255,11 +290,37 @@ static unsigned int papr_smart_get_shutdown_count(struct
ndctl_cmd *cmd)
return (health.extension_flags & PDSM_DIMM_DSC_VALID) ?
(health.dimm_dsc) : 0;
+}
+
+static int papr_cmd_smart_inject_fatal(struct ndctl_cmd *cmd, bool enable)
+{
+ if (papr_smart_inject_valid(cmd) < 0)
+ return -EINVAL;
+
+ to_payload(cmd)->inject.flags |= PDSM_SMART_INJECT_HEALTH_FATAL;
+ to_payload(cmd)->inject.fatal_enable = enable;
+ return 0;
+}
+
+static int papr_cmd_smart_inject_unsafe_shutdown(struct ndctl_cmd *cmd,
+ bool enable)
+{
+ if (papr_smart_inject_valid(cmd) < 0)
+ return -EINVAL;
+
+ to_payload(cmd)->inject.flags |= PDSM_SMART_INJECT_BAD_SHUTDOWN;
+ to_payload(cmd)->inject.unsafe_shutdown_enable = enable;
+
+ return 0;
}
struct ndctl_dimm_ops * const papr_dimm_ops = &(struct ndctl_dimm_ops) {
.cmd_is_supported = papr_cmd_is_supported,
+ .new_smart_inject = papr_new_smart_inject,
+ .smart_inject_supported = papr_smart_inject_supported,
+ .smart_inject_fatal = papr_cmd_smart_inject_fatal,
+ .smart_inject_unsafe_shutdown = papr_cmd_smart_inject_unsafe_shutdown,
.smart_get_flags = papr_smart_get_flags,
.get_firmware_status = papr_get_firmware_status,
.xlat_firmware_status = papr_xlat_firmware_status,
diff --git a/ndctl/lib/papr_pdsm.h b/ndctl/lib/papr_pdsm.h
index f45b1e40c075..20ac20f89acd 100644
--- a/ndctl/lib/papr_pdsm.h
+++ b/ndctl/lib/papr_pdsm.h
@@ -121,12 +121,29 @@ struct nd_papr_pdsm_health {
enum papr_pdsm {
PAPR_PDSM_MIN = 0x0,
PAPR_PDSM_HEALTH,
+ PAPR_PDSM_SMART_INJECT,
PAPR_PDSM_MAX,
};
+/* Flags for injecting specific smart errors */
+#define PDSM_SMART_INJECT_HEALTH_FATAL (1 << 0)
+#define PDSM_SMART_INJECT_BAD_SHUTDOWN (1 << 1)
+
+struct nd_papr_pdsm_smart_inject {
+ union {
+ struct {
+ /* One or more of PDSM_SMART_INJECT_ */
+ __u32 flags;
+ __u8 fatal_enable;
+ __u8 unsafe_shutdown_enable;
+ };
+ __u8 buf[ND_PDSM_PAYLOAD_MAX_SIZE];
+ };
+};
/* Maximal union that can hold all possible payload types */
union nd_pdsm_payload {
struct nd_papr_pdsm_health health;
+ struct nd_papr_pdsm_smart_inject inject;
__u8 buf[ND_PDSM_PAYLOAD_MAX_SIZE];
} __attribute__((packed));
-aneesh
