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docs: octeontx2: Add Documentation for NPA health reporters
Add Documentation for devlink health reporters for NPA block. Signed-off-by: George Cherian <george.cherian@marvell.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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@ -12,6 +12,7 @@ Contents
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- `Overview`_
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- `Drivers`_
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- `Basic packet flow`_
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- `Devlink health reporters`_
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Overview
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========
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@ -157,3 +158,52 @@ Egress
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3. The SQ descriptor ring is maintained in buffers allocated from SQ mapped pool of NPA block LF.
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4. NIX block transmits the pkt on the designated channel.
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5. NPC MCAM entries can be installed to divert pkt onto a different channel.
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Devlink health reporters
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========================
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NPA Reporters
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-------------
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The NPA reporters are responsible for reporting and recovering the following group of errors
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1. GENERAL events
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- Error due to operation of unmapped PF.
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- Error due to disabled alloc/free for other HW blocks (NIX, SSO, TIM, DPI and AURA).
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2. ERROR events
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- Fault due to NPA_AQ_INST_S read or NPA_AQ_RES_S write.
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- AQ Doorbell Error.
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3. RAS events
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- RAS Error Reporting for NPA_AQ_INST_S/NPA_AQ_RES_S.
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4. RVU events
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- Error due to unmapped slot.
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Sample Output
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-------------
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~# devlink health
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pci/0002:01:00.0:
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reporter hw_npa_intr
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state healthy error 2872 recover 2872 last_dump_date 2020-12-10 last_dump_time 09:39:09 grace_period 0 auto_recover true auto_dump true
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reporter hw_npa_gen
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state healthy error 2872 recover 2872 last_dump_date 2020-12-11 last_dump_time 04:43:04 grace_period 0 auto_recover true auto_dump true
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reporter hw_npa_err
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state healthy error 2871 recover 2871 last_dump_date 2020-12-10 last_dump_time 09:39:17 grace_period 0 auto_recover true auto_dump true
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reporter hw_npa_ras
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state healthy error 0 recover 0 last_dump_date 2020-12-10 last_dump_time 09:32:40 grace_period 0 auto_recover true auto_dump true
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Each reporter dumps the
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- Error Type
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- Error Register value
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- Reason in words
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For eg:
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~# devlink health dump show pci/0002:01:00.0 reporter hw_npa_gen
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NPA_AF_GENERAL:
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NPA General Interrupt Reg : 1
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NIX0: free disabled RX
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~# devlink health dump show pci/0002:01:00.0 reporter hw_npa_intr
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NPA_AF_RVU:
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NPA RVU Interrupt Reg : 1
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Unmap Slot Error
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~# devlink health dump show pci/0002:01:00.0 reporter hw_npa_err
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NPA_AF_ERR:
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NPA Error Interrupt Reg : 4096
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AQ Doorbell Error
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