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Date: Mon, 17 Apr 2023 17:32:18 -0700
From: Shannon Nelson <shannon.nelson@....com>
To: <shannon.nelson@....com>, <brett.creeley@....com>,
<davem@...emloft.net>, <netdev@...r.kernel.org>, <kuba@...nel.org>
CC: <drivers@...sando.io>, <leon@...nel.org>, <jiri@...nulli.us>,
<simon.horman@...igine.com>
Subject: [PATCH v10 net-next 04/14] pds_core: add devlink health facilities
Add devlink health reporting on top of our fw watchdog.
Example:
# devlink health show pci/0000:2b:00.0 reporter fw
pci/0000:2b:00.0:
reporter fw
state healthy error 0 recover 0
# devlink health diagnose pci/0000:2b:00.0 reporter fw
Status: healthy State: 1 Generation: 0 Recoveries: 0
Signed-off-by: Shannon Nelson <shannon.nelson@....com>
Acked-by: Jakub Kicinski <kuba@...nel.org>
---
.../device_drivers/ethernet/amd/pds_core.rst | 12 ++++++
drivers/net/ethernet/amd/pds_core/Makefile | 1 +
drivers/net/ethernet/amd/pds_core/core.c | 8 +++-
drivers/net/ethernet/amd/pds_core/core.h | 6 +++
drivers/net/ethernet/amd/pds_core/devlink.c | 40 +++++++++++++++++++
drivers/net/ethernet/amd/pds_core/main.c | 22 ++++++++++
6 files changed, 88 insertions(+), 1 deletion(-)
create mode 100644 drivers/net/ethernet/amd/pds_core/devlink.c
diff --git a/Documentation/networking/device_drivers/ethernet/amd/pds_core.rst b/Documentation/networking/device_drivers/ethernet/amd/pds_core.rst
index 99a70026f1bc..5b88173a20ff 100644
--- a/Documentation/networking/device_drivers/ethernet/amd/pds_core.rst
+++ b/Documentation/networking/device_drivers/ethernet/amd/pds_core.rst
@@ -26,6 +26,18 @@ messages such as these::
pds_core 0000:b6:00.0: 252.048 Gb/s available PCIe bandwidth (16.0 GT/s PCIe x16 link)
pds_core 0000:b6:00.0: FW: 1.60.0-73
+Health Reporters
+================
+
+The driver supports a devlink health reporter for FW status::
+
+ # devlink health show pci/0000:2b:00.0 reporter fw
+ pci/0000:2b:00.0:
+ reporter fw
+ state healthy error 0 recover 0
+ # devlink health diagnose pci/0000:2b:00.0 reporter fw
+ Status: healthy State: 1 Generation: 0 Recoveries: 0
+
Support
=======
diff --git a/drivers/net/ethernet/amd/pds_core/Makefile b/drivers/net/ethernet/amd/pds_core/Makefile
index 95a6c31e92d2..eaca8557ba66 100644
--- a/drivers/net/ethernet/amd/pds_core/Makefile
+++ b/drivers/net/ethernet/amd/pds_core/Makefile
@@ -4,6 +4,7 @@
obj-$(CONFIG_PDS_CORE) := pds_core.o
pds_core-y := main.o \
+ devlink.o \
dev.o \
core.o
diff --git a/drivers/net/ethernet/amd/pds_core/core.c b/drivers/net/ethernet/amd/pds_core/core.c
index 701d27471858..ab8531386226 100644
--- a/drivers/net/ethernet/amd/pds_core/core.c
+++ b/drivers/net/ethernet/amd/pds_core/core.c
@@ -5,7 +5,7 @@
int pdsc_setup(struct pdsc *pdsc, bool init)
{
- int err = 0;
+ int err;
if (init)
err = pdsc_dev_init(pdsc);
@@ -42,6 +42,8 @@ static void pdsc_fw_down(struct pdsc *pdsc)
return;
}
+ devlink_health_report(pdsc->fw_reporter, "FW down reported", pdsc);
+
pdsc_teardown(pdsc, PDSC_TEARDOWN_RECOVERY);
}
@@ -58,6 +60,10 @@ static void pdsc_fw_up(struct pdsc *pdsc)
if (err)
goto err_out;
+ pdsc->fw_recoveries++;
+ devlink_health_reporter_state_update(pdsc->fw_reporter,
+ DEVLINK_HEALTH_REPORTER_STATE_HEALTHY);
+
return;
err_out:
diff --git a/drivers/net/ethernet/amd/pds_core/core.h b/drivers/net/ethernet/amd/pds_core/core.h
index 83c528a2a131..32aa38c40024 100644
--- a/drivers/net/ethernet/amd/pds_core/core.h
+++ b/drivers/net/ethernet/amd/pds_core/core.h
@@ -68,6 +68,8 @@ struct pdsc {
struct timer_list wdtimer;
unsigned int wdtimer_period;
struct work_struct health_work;
+ struct devlink_health_reporter *fw_reporter;
+ u32 fw_recoveries;
struct pdsc_devinfo dev_info;
struct pds_core_dev_identity dev_ident;
@@ -88,6 +90,10 @@ struct pdsc {
u64 __iomem *kern_dbpage;
};
+int pdsc_fw_reporter_diagnose(struct devlink_health_reporter *reporter,
+ struct devlink_fmsg *fmsg,
+ struct netlink_ext_ack *extack);
+
void pdsc_debugfs_create(void);
void pdsc_debugfs_destroy(void);
void pdsc_debugfs_add_dev(struct pdsc *pdsc);
diff --git a/drivers/net/ethernet/amd/pds_core/devlink.c b/drivers/net/ethernet/amd/pds_core/devlink.c
new file mode 100644
index 000000000000..3b05b1af65d1
--- /dev/null
+++ b/drivers/net/ethernet/amd/pds_core/devlink.c
@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 2023 Advanced Micro Devices, Inc */
+
+#include "core.h"
+
+int pdsc_fw_reporter_diagnose(struct devlink_health_reporter *reporter,
+ struct devlink_fmsg *fmsg,
+ struct netlink_ext_ack *extack)
+{
+ struct pdsc *pdsc = devlink_health_reporter_priv(reporter);
+ int err;
+
+ mutex_lock(&pdsc->config_lock);
+
+ if (test_bit(PDSC_S_FW_DEAD, &pdsc->state))
+ err = devlink_fmsg_string_pair_put(fmsg, "Status", "dead");
+ else if (!pdsc_is_fw_good(pdsc))
+ err = devlink_fmsg_string_pair_put(fmsg, "Status", "unhealthy");
+ else
+ err = devlink_fmsg_string_pair_put(fmsg, "Status", "healthy");
+
+ mutex_unlock(&pdsc->config_lock);
+
+ if (err)
+ return err;
+
+ err = devlink_fmsg_u32_pair_put(fmsg, "State",
+ pdsc->fw_status &
+ ~PDS_CORE_FW_STS_F_GENERATION);
+ if (err)
+ return err;
+
+ err = devlink_fmsg_u32_pair_put(fmsg, "Generation",
+ pdsc->fw_generation >> 4);
+ if (err)
+ return err;
+
+ return devlink_fmsg_u32_pair_put(fmsg, "Recoveries",
+ pdsc->fw_recoveries);
+}
diff --git a/drivers/net/ethernet/amd/pds_core/main.c b/drivers/net/ethernet/amd/pds_core/main.c
index c9fbf1d374a7..54f3aed7adb1 100644
--- a/drivers/net/ethernet/amd/pds_core/main.c
+++ b/drivers/net/ethernet/amd/pds_core/main.c
@@ -130,10 +130,16 @@ static int pdsc_init_vf(struct pdsc *vf)
return -1;
}
+static const struct devlink_health_reporter_ops pdsc_fw_reporter_ops = {
+ .name = "fw",
+ .diagnose = pdsc_fw_reporter_diagnose,
+};
+
#define PDSC_WQ_NAME_LEN 24
static int pdsc_init_pf(struct pdsc *pdsc)
{
+ struct devlink_health_reporter *hr;
char wq_name[PDSC_WQ_NAME_LEN];
struct devlink *dl;
int err;
@@ -172,6 +178,16 @@ static int pdsc_init_pf(struct pdsc *pdsc)
dl = priv_to_devlink(pdsc);
devl_lock(dl);
+
+ hr = devl_health_reporter_create(dl, &pdsc_fw_reporter_ops, 0, pdsc);
+ if (IS_ERR(hr)) {
+ dev_warn(pdsc->dev, "Failed to create fw reporter: %pe\n", hr);
+ err = PTR_ERR(hr);
+ devl_unlock(dl);
+ goto err_out_teardown;
+ }
+ pdsc->fw_reporter = hr;
+
devl_register(dl);
devl_unlock(dl);
@@ -180,6 +196,8 @@ static int pdsc_init_pf(struct pdsc *pdsc)
return 0;
+err_out_teardown:
+ pdsc_teardown(pdsc, PDSC_TEARDOWN_REMOVING);
err_out_unmap_bars:
mutex_unlock(&pdsc->config_lock);
del_timer_sync(&pdsc->wdtimer);
@@ -283,6 +301,10 @@ static void pdsc_remove(struct pci_dev *pdev)
dl = priv_to_devlink(pdsc);
devl_lock(dl);
devl_unregister(dl);
+ if (pdsc->fw_reporter) {
+ devl_health_reporter_destroy(pdsc->fw_reporter);
+ pdsc->fw_reporter = NULL;
+ }
devl_unlock(dl);
if (!pdev->is_virtfn) {
--
2.17.1
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