ice: Add additional CSR registers to ETHTOOL_GREGS

In the event of a Tx hang it can be useful to read a variety of hardware
registers to capture some state about why the transmit queue got stuck.

Extend the ETHTOOL_GREGS dump provided by the ice driver with several CSR
registers that provide such relevant information regarding the hardware Tx
state. This enables capturing relevant data to enable debugging such a Tx
hang.
Signed-off-by: Lukasz Czapnik <lukasz.czapnik@intel.com>
Signed-off-by: Mateusz Palczewski <mateusz.palczewski@intel.com>
Tested-by: Gurucharan <gurucharanx.g@intel.com> (A Contingent worker at Intel)
Link: https://lore.kernel.org/r/20221027104239.1691549-1-jacob.e.keller@intel.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/intel/ice/ice_ethtool.c

@@ -151,6 +151,175 @@ static const u32 ice_regs_dump_list[] = {
 	QINT_RQCTL(0),
 	PFINT_OICR_ENA,
 	QRX_ITR(0),
+#define GLDCB_TLPM_PCI_DM			0x000A0180
+	GLDCB_TLPM_PCI_DM,
+#define GLDCB_TLPM_TC2PFC			0x000A0194
+	GLDCB_TLPM_TC2PFC,
+#define TCDCB_TLPM_WAIT_DM(_i)			(0x000A0080 + ((_i) * 4))
+	TCDCB_TLPM_WAIT_DM(0),
+	TCDCB_TLPM_WAIT_DM(1),
+	TCDCB_TLPM_WAIT_DM(2),
+	TCDCB_TLPM_WAIT_DM(3),
+	TCDCB_TLPM_WAIT_DM(4),
+	TCDCB_TLPM_WAIT_DM(5),
+	TCDCB_TLPM_WAIT_DM(6),
+	TCDCB_TLPM_WAIT_DM(7),
+	TCDCB_TLPM_WAIT_DM(8),
+	TCDCB_TLPM_WAIT_DM(9),
+	TCDCB_TLPM_WAIT_DM(10),
+	TCDCB_TLPM_WAIT_DM(11),
+	TCDCB_TLPM_WAIT_DM(12),
+	TCDCB_TLPM_WAIT_DM(13),
+	TCDCB_TLPM_WAIT_DM(14),
+	TCDCB_TLPM_WAIT_DM(15),
+	TCDCB_TLPM_WAIT_DM(16),
+	TCDCB_TLPM_WAIT_DM(17),
+	TCDCB_TLPM_WAIT_DM(18),
+	TCDCB_TLPM_WAIT_DM(19),
+	TCDCB_TLPM_WAIT_DM(20),
+	TCDCB_TLPM_WAIT_DM(21),
+	TCDCB_TLPM_WAIT_DM(22),
+	TCDCB_TLPM_WAIT_DM(23),
+	TCDCB_TLPM_WAIT_DM(24),
+	TCDCB_TLPM_WAIT_DM(25),
+	TCDCB_TLPM_WAIT_DM(26),
+	TCDCB_TLPM_WAIT_DM(27),
+	TCDCB_TLPM_WAIT_DM(28),
+	TCDCB_TLPM_WAIT_DM(29),
+	TCDCB_TLPM_WAIT_DM(30),
+	TCDCB_TLPM_WAIT_DM(31),
+#define GLPCI_WATMK_CLNT_PIPEMON		0x000BFD90
+	GLPCI_WATMK_CLNT_PIPEMON,
+#define GLPCI_CUR_CLNT_COMMON			0x000BFD84
+	GLPCI_CUR_CLNT_COMMON,
+#define GLPCI_CUR_CLNT_PIPEMON			0x000BFD88
+	GLPCI_CUR_CLNT_PIPEMON,
+#define GLPCI_PCIERR				0x0009DEB0
+	GLPCI_PCIERR,
+#define GLPSM_DEBUG_CTL_STATUS			0x000B0600
+	GLPSM_DEBUG_CTL_STATUS,
+#define GLPSM0_DEBUG_FIFO_OVERFLOW_DETECT	0x000B0680
+	GLPSM0_DEBUG_FIFO_OVERFLOW_DETECT,
+#define GLPSM0_DEBUG_FIFO_UNDERFLOW_DETECT	0x000B0684
+	GLPSM0_DEBUG_FIFO_UNDERFLOW_DETECT,
+#define GLPSM0_DEBUG_DT_OUT_OF_WINDOW		0x000B0688
+	GLPSM0_DEBUG_DT_OUT_OF_WINDOW,
+#define GLPSM0_DEBUG_INTF_HW_ERROR_DETECT	0x000B069C
+	GLPSM0_DEBUG_INTF_HW_ERROR_DETECT,
+#define GLPSM0_DEBUG_MISC_HW_ERROR_DETECT	0x000B06A0
+	GLPSM0_DEBUG_MISC_HW_ERROR_DETECT,
+#define GLPSM1_DEBUG_FIFO_OVERFLOW_DETECT	0x000B0E80
+	GLPSM1_DEBUG_FIFO_OVERFLOW_DETECT,
+#define GLPSM1_DEBUG_FIFO_UNDERFLOW_DETECT	0x000B0E84
+	GLPSM1_DEBUG_FIFO_UNDERFLOW_DETECT,
+#define GLPSM1_DEBUG_SRL_FIFO_OVERFLOW_DETECT	0x000B0E88
+	GLPSM1_DEBUG_SRL_FIFO_OVERFLOW_DETECT,
+#define GLPSM1_DEBUG_SRL_FIFO_UNDERFLOW_DETECT  0x000B0E8C
+	GLPSM1_DEBUG_SRL_FIFO_UNDERFLOW_DETECT,
+#define GLPSM1_DEBUG_MISC_HW_ERROR_DETECT       0x000B0E90
+	GLPSM1_DEBUG_MISC_HW_ERROR_DETECT,
+#define GLPSM2_DEBUG_FIFO_OVERFLOW_DETECT       0x000B1680
+	GLPSM2_DEBUG_FIFO_OVERFLOW_DETECT,
+#define GLPSM2_DEBUG_FIFO_UNDERFLOW_DETECT      0x000B1684
+	GLPSM2_DEBUG_FIFO_UNDERFLOW_DETECT,
+#define GLPSM2_DEBUG_MISC_HW_ERROR_DETECT       0x000B1688
+	GLPSM2_DEBUG_MISC_HW_ERROR_DETECT,
+#define GLTDPU_TCLAN_COMP_BOB(_i)               (0x00049ADC + ((_i) * 4))
+	GLTDPU_TCLAN_COMP_BOB(1),
+	GLTDPU_TCLAN_COMP_BOB(2),
+	GLTDPU_TCLAN_COMP_BOB(3),
+	GLTDPU_TCLAN_COMP_BOB(4),
+	GLTDPU_TCLAN_COMP_BOB(5),
+	GLTDPU_TCLAN_COMP_BOB(6),
+	GLTDPU_TCLAN_COMP_BOB(7),
+	GLTDPU_TCLAN_COMP_BOB(8),
+#define GLTDPU_TCB_CMD_BOB(_i)                  (0x0004975C + ((_i) * 4))
+	GLTDPU_TCB_CMD_BOB(1),
+	GLTDPU_TCB_CMD_BOB(2),
+	GLTDPU_TCB_CMD_BOB(3),
+	GLTDPU_TCB_CMD_BOB(4),
+	GLTDPU_TCB_CMD_BOB(5),
+	GLTDPU_TCB_CMD_BOB(6),
+	GLTDPU_TCB_CMD_BOB(7),
+	GLTDPU_TCB_CMD_BOB(8),
+#define GLTDPU_PSM_UPDATE_BOB(_i)               (0x00049B5C + ((_i) * 4))
+	GLTDPU_PSM_UPDATE_BOB(1),
+	GLTDPU_PSM_UPDATE_BOB(2),
+	GLTDPU_PSM_UPDATE_BOB(3),
+	GLTDPU_PSM_UPDATE_BOB(4),
+	GLTDPU_PSM_UPDATE_BOB(5),
+	GLTDPU_PSM_UPDATE_BOB(6),
+	GLTDPU_PSM_UPDATE_BOB(7),
+	GLTDPU_PSM_UPDATE_BOB(8),
+#define GLTCB_CMD_IN_BOB(_i)                    (0x000AE288 + ((_i) * 4))
+	GLTCB_CMD_IN_BOB(1),
+	GLTCB_CMD_IN_BOB(2),
+	GLTCB_CMD_IN_BOB(3),
+	GLTCB_CMD_IN_BOB(4),
+	GLTCB_CMD_IN_BOB(5),
+	GLTCB_CMD_IN_BOB(6),
+	GLTCB_CMD_IN_BOB(7),
+	GLTCB_CMD_IN_BOB(8),
+#define GLLAN_TCLAN_FETCH_CTL_FBK_BOB_CTL(_i)   (0x000FC148 + ((_i) * 4))
+	GLLAN_TCLAN_FETCH_CTL_FBK_BOB_CTL(1),
+	GLLAN_TCLAN_FETCH_CTL_FBK_BOB_CTL(2),
+	GLLAN_TCLAN_FETCH_CTL_FBK_BOB_CTL(3),
+	GLLAN_TCLAN_FETCH_CTL_FBK_BOB_CTL(4),
+	GLLAN_TCLAN_FETCH_CTL_FBK_BOB_CTL(5),
+	GLLAN_TCLAN_FETCH_CTL_FBK_BOB_CTL(6),
+	GLLAN_TCLAN_FETCH_CTL_FBK_BOB_CTL(7),
+	GLLAN_TCLAN_FETCH_CTL_FBK_BOB_CTL(8),
+#define GLLAN_TCLAN_FETCH_CTL_SCHED_BOB_CTL(_i) (0x000FC248 + ((_i) * 4))
+	GLLAN_TCLAN_FETCH_CTL_SCHED_BOB_CTL(1),
+	GLLAN_TCLAN_FETCH_CTL_SCHED_BOB_CTL(2),
+	GLLAN_TCLAN_FETCH_CTL_SCHED_BOB_CTL(3),
+	GLLAN_TCLAN_FETCH_CTL_SCHED_BOB_CTL(4),
+	GLLAN_TCLAN_FETCH_CTL_SCHED_BOB_CTL(5),
+	GLLAN_TCLAN_FETCH_CTL_SCHED_BOB_CTL(6),
+	GLLAN_TCLAN_FETCH_CTL_SCHED_BOB_CTL(7),
+	GLLAN_TCLAN_FETCH_CTL_SCHED_BOB_CTL(8),
+#define GLLAN_TCLAN_CACHE_CTL_BOB_CTL(_i)       (0x000FC1C8 + ((_i) * 4))
+	GLLAN_TCLAN_CACHE_CTL_BOB_CTL(1),
+	GLLAN_TCLAN_CACHE_CTL_BOB_CTL(2),
+	GLLAN_TCLAN_CACHE_CTL_BOB_CTL(3),
+	GLLAN_TCLAN_CACHE_CTL_BOB_CTL(4),
+	GLLAN_TCLAN_CACHE_CTL_BOB_CTL(5),
+	GLLAN_TCLAN_CACHE_CTL_BOB_CTL(6),
+	GLLAN_TCLAN_CACHE_CTL_BOB_CTL(7),
+	GLLAN_TCLAN_CACHE_CTL_BOB_CTL(8),
+#define GLLAN_TCLAN_FETCH_CTL_PROC_BOB_CTL(_i)  (0x000FC188 + ((_i) * 4))
+	GLLAN_TCLAN_FETCH_CTL_PROC_BOB_CTL(1),
+	GLLAN_TCLAN_FETCH_CTL_PROC_BOB_CTL(2),
+	GLLAN_TCLAN_FETCH_CTL_PROC_BOB_CTL(3),
+	GLLAN_TCLAN_FETCH_CTL_PROC_BOB_CTL(4),
+	GLLAN_TCLAN_FETCH_CTL_PROC_BOB_CTL(5),
+	GLLAN_TCLAN_FETCH_CTL_PROC_BOB_CTL(6),
+	GLLAN_TCLAN_FETCH_CTL_PROC_BOB_CTL(7),
+	GLLAN_TCLAN_FETCH_CTL_PROC_BOB_CTL(8),
+#define GLLAN_TCLAN_FETCH_CTL_PCIE_RD_BOB_CTL(_i) (0x000FC288 + ((_i) * 4))
+	GLLAN_TCLAN_FETCH_CTL_PCIE_RD_BOB_CTL(1),
+	GLLAN_TCLAN_FETCH_CTL_PCIE_RD_BOB_CTL(2),
+	GLLAN_TCLAN_FETCH_CTL_PCIE_RD_BOB_CTL(3),
+	GLLAN_TCLAN_FETCH_CTL_PCIE_RD_BOB_CTL(4),
+	GLLAN_TCLAN_FETCH_CTL_PCIE_RD_BOB_CTL(5),
+	GLLAN_TCLAN_FETCH_CTL_PCIE_RD_BOB_CTL(6),
+	GLLAN_TCLAN_FETCH_CTL_PCIE_RD_BOB_CTL(7),
+	GLLAN_TCLAN_FETCH_CTL_PCIE_RD_BOB_CTL(8),
+#define PRTDCB_TCUPM_REG_CM(_i)			(0x000BC360 + ((_i) * 4))
+	PRTDCB_TCUPM_REG_CM(0),
+	PRTDCB_TCUPM_REG_CM(1),
+	PRTDCB_TCUPM_REG_CM(2),
+	PRTDCB_TCUPM_REG_CM(3),
+#define PRTDCB_TCUPM_REG_DM(_i)			(0x000BC3A0 + ((_i) * 4))
+	PRTDCB_TCUPM_REG_DM(0),
+	PRTDCB_TCUPM_REG_DM(1),
+	PRTDCB_TCUPM_REG_DM(2),
+	PRTDCB_TCUPM_REG_DM(3),
+#define PRTDCB_TLPM_REG_DM(_i)			(0x000A0000 + ((_i) * 4))
+	PRTDCB_TLPM_REG_DM(0),
+	PRTDCB_TLPM_REG_DM(1),
+	PRTDCB_TLPM_REG_DM(2),
+	PRTDCB_TLPM_REG_DM(3),
 };
 
 struct ice_priv_flag {