From: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Periodically poll the FW heartbeat register and FW recovery counter
registers to check the FW health. Polling frequency will be
advertised by the FW in HWRM_ERROR_RECOVERY_QCFG response.
Schedule the task upon receiving the async event from FW.
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>
---
drivers/net/bnxt/bnxt.h | 5 ++
drivers/net/bnxt/bnxt_cpr.c | 7 +++
drivers/net/bnxt/bnxt_ethdev.c | 89 ++++++++++++++++++++++++++++++++++
3 files changed, 101 insertions(+)
@@ -368,6 +368,9 @@ struct bnxt_error_recovery_info {
#define BNXT_FLAG_MASTER_FUNC (1 << 2)
#define BNXT_FLAG_RECOVERY_ENABLED (1 << 3)
uint32_t flags;
+
+ uint32_t last_heart_beat;
+ uint32_t last_reset_counter;
};
/* address space location of register */
@@ -531,6 +534,8 @@ int bnxt_rcv_msg_from_vf(struct bnxt *bp, uint16_t vf_id, void *msg);
int is_bnxt_in_error(struct bnxt *bp);
int bnxt_map_fw_health_status_regs(struct bnxt *bp);
+uint32_t bnxt_read_fw_status_reg(struct bnxt *bp, uint32_t index);
+void bnxt_schedule_fw_health_check(struct bnxt *bp);
bool is_bnxt_supported(struct rte_eth_dev *dev);
bool bnxt_stratus_device(struct bnxt *bp);
@@ -88,6 +88,13 @@ void bnxt_handle_async_event(struct bnxt *bp,
PMD_DRV_LOG(INFO, "recovery enabled(%d), master function(%d)\n",
bnxt_is_recovery_enabled(bp),
bnxt_is_master_func(bp));
+
+ info->last_heart_beat =
+ bnxt_read_fw_status_reg(bp, BNXT_FW_HEARTBEAT_CNT_REG);
+ info->last_reset_counter =
+ bnxt_read_fw_status_reg(bp, BNXT_FW_RECOVERY_CNT_REG);
+
+ bnxt_schedule_fw_health_check(bp);
break;
default:
PMD_DRV_LOG(INFO, "handle_async_event id = 0x%x\n", event_id);
@@ -169,6 +169,7 @@ static int bnxt_mtu_set_op(struct rte_eth_dev *eth_dev, uint16_t new_mtu);
static int bnxt_dev_uninit(struct rte_eth_dev *eth_dev);
static int bnxt_init_resources(struct bnxt *bp, bool reconfig_dev);
static int bnxt_uninit_resources(struct bnxt *bp, bool reconfig_dev);
+static void bnxt_cancel_fw_health_check(struct bnxt *bp);
int is_bnxt_in_error(struct bnxt *bp)
{
@@ -880,6 +881,8 @@ static void bnxt_dev_stop_op(struct rte_eth_dev *eth_dev)
/* disable uio/vfio intr/eventfd mapping */
rte_intr_disable(intr_handle);
+ bnxt_cancel_fw_health_check(bp);
+
bp->flags &= ~BNXT_FLAG_INIT_DONE;
if (bp->eth_dev->data->dev_started) {
/* TBD: STOP HW queues DMA */
@@ -3608,6 +3611,92 @@ int bnxt_dev_reset_and_resume(struct bnxt *bp)
return rc;
}
+uint32_t bnxt_read_fw_status_reg(struct bnxt *bp, uint32_t index)
+{
+ struct bnxt_error_recovery_info *info = bp->recovery_info;
+ uint32_t reg = info->status_regs[index];
+ uint32_t type, offset, val = 0;
+
+ type = BNXT_FW_STATUS_REG_TYPE(reg);
+ offset = BNXT_FW_STATUS_REG_OFF(reg);
+
+ switch (type) {
+ case BNXT_FW_STATUS_REG_TYPE_CFG:
+ rte_pci_read_config(bp->pdev, &val, sizeof(val), offset);
+ break;
+ case BNXT_FW_STATUS_REG_TYPE_GRC:
+ offset = info->mapped_status_regs[index];
+ /* FALLTHROUGH */
+ case BNXT_FW_STATUS_REG_TYPE_BAR0:
+ val = rte_le_to_cpu_32(rte_read32((uint8_t *)bp->bar0 +
+ offset));
+ break;
+ }
+
+ return val;
+}
+
+/* Driver should poll FW heartbeat, reset_counter with the frequency
+ * advertised by FW in HWRM_ERROR_RECOVERY_QCFG.
+ * When the driver detects heartbeat stop or change in reset_counter,
+ * it has to trigger a reset to recover from the error condition.
+ * A “master PF” is the function who will have the privilege to
+ * initiate the chimp reset. The master PF will be elected by the
+ * firmware and will be notified through async message.
+ */
+static void bnxt_check_fw_health(void *arg)
+{
+ struct bnxt *bp = arg;
+ struct bnxt_error_recovery_info *info = bp->recovery_info;
+ uint32_t val = 0;
+
+ if (!info || !bnxt_is_recovery_enabled(bp) ||
+ is_bnxt_in_error(bp))
+ return;
+
+ val = bnxt_read_fw_status_reg(bp, BNXT_FW_HEARTBEAT_CNT_REG);
+ if (val == info->last_heart_beat)
+ goto reset;
+
+ info->last_heart_beat = val;
+
+ val = bnxt_read_fw_status_reg(bp, BNXT_FW_RECOVERY_CNT_REG);
+ if (val != info->last_reset_counter)
+ goto reset;
+
+ info->last_reset_counter = val;
+
+ rte_eal_alarm_set(US_PER_MS * info->driver_polling_freq,
+ bnxt_check_fw_health, (void *)bp);
+
+ return;
+reset:
+ /* Stop DMA to/from device */
+ bp->flags |= BNXT_FLAG_FATAL_ERROR;
+ bp->flags |= BNXT_FLAG_FW_RESET;
+
+ PMD_DRV_LOG(ERR, "Detected FW dead condition\n");
+}
+
+void bnxt_schedule_fw_health_check(struct bnxt *bp)
+{
+ uint32_t polling_freq = bp->recovery_info->driver_polling_freq;
+
+ if (!bnxt_is_recovery_enabled(bp))
+ return;
+
+ rte_eal_alarm_set(US_PER_MS * polling_freq,
+ bnxt_check_fw_health, (void *)bp);
+}
+
+static void bnxt_cancel_fw_health_check(struct bnxt *bp)
+{
+ if (!bnxt_is_recovery_enabled(bp))
+ return;
+
+ rte_eal_alarm_cancel(bnxt_check_fw_health, (void *)bp);
+}
+
static bool bnxt_vf_pciid(uint16_t id)
{
if (id == BROADCOM_DEV_ID_57304_VF ||