cxgbe(4): Retire t4_intr_clear.

The firmware clears the interrupts already and it has a better idea of
exactly what to clear for which generation of the ASIC.  There is no
need for the driver to get involved.

MFC after:	1 week
Sponsored by:	Chelsio Communications

3 files changed, 0 insertions, 96 deletions

diff --git a/sys/dev/cxgbe/common/common.h b/sys/dev/cxgbe/common/common.h
index 79bb6276f4c7..f91d4ebf7334 100644
--- a/sys/dev/cxgbe/common/common.h
+++ b/sys/dev/cxgbe/common/common.h
@@ -618,7 +618,6 @@ struct fw_filter_wr;
 
 void t4_intr_enable(struct adapter *adapter);
 void t4_intr_disable(struct adapter *adapter);
-void t4_intr_clear(struct adapter *adapter);
 bool t4_slow_intr_handler(struct adapter *adapter, bool verbose);
 
 int t4_hash_mac_addr(const u8 *addr);
diff --git a/sys/dev/cxgbe/common/t4_hw.c b/sys/dev/cxgbe/common/t4_hw.c
index 4ca87727ca59..e3d5cf814e4d 100644
--- a/sys/dev/cxgbe/common/t4_hw.c
+++ b/sys/dev/cxgbe/common/t4_hw.c
@@ -5455,99 +5455,6 @@ void t4_intr_disable(struct adapter *adap)
 }
 
 /**
- *	t4_intr_clear - clear all interrupts
- *	@adap: the adapter whose interrupts should be cleared
- *
- *	Clears all interrupts.  The caller must be a PCI function managing
- *	global interrupts.
- */
-void t4_intr_clear(struct adapter *adap)
-{
-	static const u32 cause_reg[] = {
-		A_CIM_HOST_INT_CAUSE,
-		A_CIM_HOST_UPACC_INT_CAUSE,
-		MYPF_REG(A_CIM_PF_HOST_INT_CAUSE),
-		A_CPL_INTR_CAUSE,
-		EDC_REG(A_EDC_INT_CAUSE, 0), EDC_REG(A_EDC_INT_CAUSE, 1),
-		A_LE_DB_INT_CAUSE,
-		A_MA_INT_WRAP_STATUS,
-		A_MA_PARITY_ERROR_STATUS1,
-		A_MA_INT_CAUSE,
-		A_MPS_CLS_INT_CAUSE,
-		A_MPS_RX_PERR_INT_CAUSE,
-		A_MPS_STAT_PERR_INT_CAUSE_RX_FIFO,
-		A_MPS_STAT_PERR_INT_CAUSE_SRAM,
-		A_MPS_TRC_INT_CAUSE,
-		A_MPS_TX_INT_CAUSE,
-		A_MPS_STAT_PERR_INT_CAUSE_TX_FIFO,
-		A_NCSI_INT_CAUSE,
-		A_PCIE_INT_CAUSE,
-		A_PCIE_NONFAT_ERR,
-		A_PL_PL_INT_CAUSE,
-		A_PM_RX_INT_CAUSE,
-		A_PM_TX_INT_CAUSE,
-		A_SGE_INT_CAUSE1,
-		A_SGE_INT_CAUSE2,
-		A_SGE_INT_CAUSE3,
-		A_SGE_INT_CAUSE4,
-		A_SMB_INT_CAUSE,
-		A_TP_INT_CAUSE,
-		A_ULP_RX_INT_CAUSE,
-		A_ULP_RX_INT_CAUSE_2,
-		A_ULP_TX_INT_CAUSE,
-		A_ULP_TX_INT_CAUSE_2,
-
-		MYPF_REG(A_PL_PF_INT_CAUSE),
-	};
-	int i;
-	const int nchan = adap->chip_params->nchan;
-
-	for (i = 0; i < ARRAY_SIZE(cause_reg); i++)
-		t4_write_reg(adap, cause_reg[i], 0xffffffff);
-
-	if (is_t4(adap)) {
-		t4_write_reg(adap, A_PCIE_CORE_UTL_SYSTEM_BUS_AGENT_STATUS,
-		    0xffffffff);
-		t4_write_reg(adap, A_PCIE_CORE_UTL_PCI_EXPRESS_PORT_STATUS,
-		    0xffffffff);
-		t4_write_reg(adap, A_MC_INT_CAUSE, 0xffffffff);
-		for (i = 0; i < nchan; i++) {
-			t4_write_reg(adap, PORT_REG(i, A_XGMAC_PORT_INT_CAUSE),
-			    0xffffffff);
-		}
-	}
-	if (chip_id(adap) >= CHELSIO_T5) {
-		t4_write_reg(adap, A_MA_PARITY_ERROR_STATUS2, 0xffffffff);
-		t4_write_reg(adap, A_MPS_STAT_PERR_INT_CAUSE_SRAM1, 0xffffffff);
-		t4_write_reg(adap, A_SGE_INT_CAUSE5, 0xffffffff);
-		t4_write_reg(adap, A_MC_P_INT_CAUSE, 0xffffffff);
-		if (is_t5(adap)) {
-			t4_write_reg(adap, MC_REG(A_MC_P_INT_CAUSE, 1),
-			    0xffffffff);
-		}
-		for (i = 0; i < nchan; i++) {
-			t4_write_reg(adap, T5_PORT_REG(i,
-			    A_MAC_PORT_PERR_INT_CAUSE), 0xffffffff);
-			if (chip_id(adap) > CHELSIO_T5) {
-				t4_write_reg(adap, T5_PORT_REG(i,
-				    A_MAC_PORT_PERR_INT_CAUSE_100G),
-				    0xffffffff);
-			}
-			t4_write_reg(adap, T5_PORT_REG(i, A_MAC_PORT_INT_CAUSE),
-			    0xffffffff);
-		}
-	}
-	if (chip_id(adap) >= CHELSIO_T6) {
-		t4_write_reg(adap, A_SGE_INT_CAUSE6, 0xffffffff);
-	}
-
-	t4_write_reg(adap, A_MPS_INT_CAUSE, is_t4(adap) ? 0 : 0xffffffff);
-	t4_write_reg(adap, A_PL_PERR_CAUSE, 0xffffffff);
-	t4_write_reg(adap, A_PL_INT_CAUSE, 0xffffffff);
-	(void) t4_read_reg(adap, A_PL_INT_CAUSE);          /* flush */
-}
-
-/**
  *	hash_mac_addr - return the hash value of a MAC address
  *	@addr: the 48-bit Ethernet MAC address
  *
diff --git a/sys/dev/cxgbe/t4_main.c b/sys/dev/cxgbe/t4_main.c
index 5c2e1fd232c2..7bdce5faf7af 100644
--- a/sys/dev/cxgbe/t4_main.c
+++ b/sys/dev/cxgbe/t4_main.c
@@ -1333,7 +1333,6 @@ t4_attach(device_t dev)
 		rc = partition_resources(sc);
 		if (rc != 0)
 			goto done; /* error message displayed already */
-		t4_intr_clear(sc);
 	}
 
 	rc = get_params__post_init(sc);
@@ -2289,7 +2288,6 @@ t4_resume(device_t dev)
 		rc = partition_resources(sc);
 		if (rc != 0)
 			goto done; /* error message displayed already */
-		t4_intr_clear(sc);
 	}
 
 	rc = get_params__post_init(sc);