Merge branch 'add-devlink-health-reporters-for-nix-block'

George Cherian says:

====================
Add devlink health reporters for NIX block

Devlink health reporters are added for the NIX block.

Address Jakub's comment to add devlink support for error reporting.
https://www.spinics.net/lists/netdev/msg670712.html

This series is in continuation to
https://www.spinics.net/lists/netdev/msg707798.html

Added Documentation for the same.
====================

Link: https://lore.kernel.org/r/20210119100120.2614730-1-george.cherian@marvell.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Documentation/networking/device_drivers/ethernet/marvell/octeontx2.rst

@@ -217,3 +217,73 @@ For example::
 	 NPA_AF_ERR:
 	        NPA Error Interrupt Reg : 4096
 	        AQ Doorbell Error
+
+
+NIX Reporters
+-------------
+The NIX reporters are responsible for reporting and recovering the following group of errors:
+
+1. GENERAL events
+
+   - Receive mirror/multicast packet drop due to insufficient buffer.
+   - SMQ Flush operation.
+
+2. ERROR events
+
+   - Memory Fault due to WQE read/write from multicast/mirror buffer.
+   - Receive multicast/mirror replication list error.
+   - Receive packet on an unmapped PF.
+   - Fault due to NIX_AQ_INST_S read or NIX_AQ_RES_S write.
+   - AQ Doorbell Error.
+
+3. RAS events
+
+   - RAS Error Reporting for NIX Receive Multicast/Mirror Entry Structure.
+   - RAS Error Reporting for WQE/Packet Data read from Multicast/Mirror Buffer..
+   - RAS Error Reporting for NIX_AQ_INST_S/NIX_AQ_RES_S.
+
+4. RVU events
+
+   - Error due to unmapped slot.
+
+Sample Output::
+
+	~# ./devlink health
+	pci/0002:01:00.0:
+	  reporter hw_npa_intr
+	    state healthy error 0 recover 0 grace_period 0 auto_recover true auto_dump true
+	  reporter hw_npa_gen
+	    state healthy error 0 recover 0 grace_period 0 auto_recover true auto_dump true
+	  reporter hw_npa_err
+	    state healthy error 0 recover 0 grace_period 0 auto_recover true auto_dump true
+	  reporter hw_npa_ras
+	    state healthy error 0 recover 0 grace_period 0 auto_recover true auto_dump true
+	  reporter hw_nix_intr
+	    state healthy error 1121 recover 1121 last_dump_date 2021-01-19 last_dump_time 05:42:26 grace_period 0 auto_recover true auto_dump true
+	  reporter hw_nix_gen
+	    state healthy error 949 recover 949 last_dump_date 2021-01-19 last_dump_time 05:42:43 grace_period 0 auto_recover true auto_dump true
+	  reporter hw_nix_err
+	    state healthy error 1147 recover 1147 last_dump_date 2021-01-19 last_dump_time 05:42:59 grace_period 0 auto_recover true auto_dump true
+	  reporter hw_nix_ras
+	    state healthy error 409 recover 409 last_dump_date 2021-01-19 last_dump_time 05:43:16 grace_period 0 auto_recover true auto_dump true
+
+Each reporter dumps the
+
+ - Error Type
+ - Error Register value
+ - Reason in words
+
+For example::
+
+	~# devlink health dump show pci/0002:01:00.0 reporter hw_nix_intr
+	 NIX_AF_RVU:
+	        NIX RVU Interrupt Reg : 1
+	        Unmap Slot Error
+	~# devlink health dump show pci/0002:01:00.0 reporter hw_nix_gen
+	 NIX_AF_GENERAL:
+	        NIX General Interrupt Reg : 1
+	        Rx multicast pkt drop
+	~# devlink health dump show pci/0002:01:00.0 reporter hw_nix_err
+	 NIX_AF_ERR:
+	        NIX Error Interrupt Reg : 64
+	        Rx on unmapped PF_FUNC

drivers/net/ethernet/marvell/octeontx2/af/rvu_devlink.h

@@ -41,11 +41,38 @@ struct rvu_npa_health_reporters {
 	struct work_struct              ras_work;
 };
 
+enum nix_af_rvu_health {
+	NIX_AF_RVU_INTR,
+	NIX_AF_RVU_GEN,
+	NIX_AF_RVU_ERR,
+	NIX_AF_RVU_RAS,
+};
+
+struct rvu_nix_event_ctx {
+	u64 nix_af_rvu_int;
+	u64 nix_af_rvu_gen;
+	u64 nix_af_rvu_err;
+	u64 nix_af_rvu_ras;
+};
+
+struct rvu_nix_health_reporters {
+	struct rvu_nix_event_ctx *nix_event_ctx;
+	struct devlink_health_reporter *rvu_hw_nix_intr_reporter;
+	struct work_struct		intr_work;
+	struct devlink_health_reporter *rvu_hw_nix_gen_reporter;
+	struct work_struct		gen_work;
+	struct devlink_health_reporter *rvu_hw_nix_err_reporter;
+	struct work_struct		err_work;
+	struct devlink_health_reporter *rvu_hw_nix_ras_reporter;
+	struct work_struct		ras_work;
+};
+
 struct rvu_devlink {
 	struct devlink *dl;
 	struct rvu *rvu;
 	struct workqueue_struct *devlink_wq;
 	struct rvu_npa_health_reporters *rvu_npa_health_reporter;
+	struct rvu_nix_health_reporters *rvu_nix_health_reporter;
 };
 
 /* Devlink APIs */

drivers/net/ethernet/marvell/octeontx2/af/rvu_struct.h

@@ -74,6 +74,16 @@ enum npa_af_int_vec_e {
 	NPA_AF_INT_VEC_CNT	= 0x5,
 };
 
+/* NIX Admin function Interrupt Vector Enumeration */
+enum nix_af_int_vec_e {
+	NIX_AF_INT_VEC_RVU	= 0x0,
+	NIX_AF_INT_VEC_GEN	= 0x1,
+	NIX_AF_INT_VEC_AQ_DONE	= 0x2,
+	NIX_AF_INT_VEC_AF_ERR	= 0x3,
+	NIX_AF_INT_VEC_POISON	= 0x4,
+	NIX_AF_INT_VEC_CNT	= 0x5,
+};
+
 /**
  * RVU PF Interrupt Vector Enumeration
  */