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cxgb4: Common platform specific changes for DB Drop Recovery
Add platform-specific callback functions for interrupts. This is needed to do a single read-clear of the CAUSE register and then call out to platform specific functions for DB threshold interrupts and DB drop interrupts. Add t4_mem_win_read_len() - mem-window reads for arbitrary lengths. This is used to read the CIDX/PIDX values from EC contexts during DB drop recovery. Add t4_fwaddrspace_write() - sends addrspace write cmds to the fw. Needed to flush the sge eq context cache. Signed-off-by: Vipul Pandya <vipul@chelsio.com> Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
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@ -723,4 +723,7 @@ int t4_ofld_eq_free(struct adapter *adap, unsigned int mbox, unsigned int pf,
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int t4_handle_fw_rpl(struct adapter *adap, const __be64 *rpl);
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void t4_db_full(struct adapter *adapter);
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void t4_db_dropped(struct adapter *adapter);
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int t4_mem_win_read_len(struct adapter *adap, u32 addr, __be32 *data, int len);
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int t4_fwaddrspace_write(struct adapter *adap, unsigned int mbox,
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u32 addr, u32 val);
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#endif /* __CXGB4_H__ */
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@ -868,11 +868,14 @@ int t4_restart_aneg(struct adapter *adap, unsigned int mbox, unsigned int port)
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return t4_wr_mbox(adap, mbox, &c, sizeof(c), NULL);
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}
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typedef void (*int_handler_t)(struct adapter *adap);
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struct intr_info {
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unsigned int mask; /* bits to check in interrupt status */
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const char *msg; /* message to print or NULL */
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short stat_idx; /* stat counter to increment or -1 */
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unsigned short fatal; /* whether the condition reported is fatal */
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int_handler_t int_handler; /* platform-specific int handler */
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};
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/**
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@ -905,6 +908,8 @@ static int t4_handle_intr_status(struct adapter *adapter, unsigned int reg,
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} else if (acts->msg && printk_ratelimit())
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dev_warn(adapter->pdev_dev, "%s (0x%x)\n", acts->msg,
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status & acts->mask);
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if (acts->int_handler)
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acts->int_handler(adapter);
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mask |= acts->mask;
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}
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status &= mask;
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@ -1013,9 +1018,9 @@ static void sge_intr_handler(struct adapter *adapter)
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{ ERR_INVALID_CIDX_INC,
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"SGE GTS CIDX increment too large", -1, 0 },
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{ ERR_CPL_OPCODE_0, "SGE received 0-length CPL", -1, 0 },
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{ F_DBFIFO_LP_INT, NULL, -1, 0 },
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{ F_DBFIFO_HP_INT, NULL, -1, 0 },
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{ ERR_DROPPED_DB, "SGE doorbell dropped", -1, 0 },
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{ F_DBFIFO_LP_INT, NULL, -1, 0, t4_db_full },
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{ F_DBFIFO_HP_INT, NULL, -1, 0, t4_db_full },
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{ F_ERR_DROPPED_DB, NULL, -1, 0, t4_db_dropped },
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{ ERR_DATA_CPL_ON_HIGH_QID1 | ERR_DATA_CPL_ON_HIGH_QID0,
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"SGE IQID > 1023 received CPL for FL", -1, 0 },
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{ ERR_BAD_DB_PIDX3, "SGE DBP 3 pidx increment too large", -1,
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@ -1036,20 +1041,14 @@ static void sge_intr_handler(struct adapter *adapter)
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};
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v = (u64)t4_read_reg(adapter, SGE_INT_CAUSE1) |
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((u64)t4_read_reg(adapter, SGE_INT_CAUSE2) << 32);
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((u64)t4_read_reg(adapter, SGE_INT_CAUSE2) << 32);
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if (v) {
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dev_alert(adapter->pdev_dev, "SGE parity error (%#llx)\n",
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(unsigned long long)v);
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(unsigned long long)v);
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t4_write_reg(adapter, SGE_INT_CAUSE1, v);
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t4_write_reg(adapter, SGE_INT_CAUSE2, v >> 32);
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}
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err = t4_read_reg(adapter, A_SGE_INT_CAUSE3);
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if (err & (F_DBFIFO_HP_INT|F_DBFIFO_LP_INT))
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t4_db_full(adapter);
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if (err & F_ERR_DROPPED_DB)
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t4_db_dropped(adapter);
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if (t4_handle_intr_status(adapter, SGE_INT_CAUSE3, sge_intr_info) ||
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v != 0)
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t4_fatal_err(adapter);
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@ -1995,6 +1994,54 @@ int t4_wol_pat_enable(struct adapter *adap, unsigned int port, unsigned int map,
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(var).retval_len16 = htonl(FW_LEN16(var)); \
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} while (0)
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int t4_fwaddrspace_write(struct adapter *adap, unsigned int mbox,
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u32 addr, u32 val)
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{
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struct fw_ldst_cmd c;
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memset(&c, 0, sizeof(c));
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c.op_to_addrspace = htonl(V_FW_CMD_OP(FW_LDST_CMD) | F_FW_CMD_REQUEST |
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F_FW_CMD_WRITE |
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V_FW_LDST_CMD_ADDRSPACE(FW_LDST_ADDRSPC_FIRMWARE));
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c.cycles_to_len16 = htonl(FW_LEN16(c));
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c.u.addrval.addr = htonl(addr);
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c.u.addrval.val = htonl(val);
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return t4_wr_mbox(adap, mbox, &c, sizeof(c), NULL);
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}
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/*
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* t4_mem_win_read_len - read memory through PCIE memory window
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* @adap: the adapter
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* @addr: address of first byte requested aligned on 32b.
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* @data: len bytes to hold the data read
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* @len: amount of data to read from window. Must be <=
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* MEMWIN0_APERATURE after adjusting for 16B alignment
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* requirements of the the memory window.
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*
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* Read len bytes of data from MC starting at @addr.
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*/
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int t4_mem_win_read_len(struct adapter *adap, u32 addr, __be32 *data, int len)
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{
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int i;
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int off;
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/*
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* Align on a 16B boundary.
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*/
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off = addr & 15;
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if ((addr & 3) || (len + off) > MEMWIN0_APERTURE)
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return -EINVAL;
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t4_write_reg(adap, A_PCIE_MEM_ACCESS_OFFSET, addr & ~15);
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t4_read_reg(adap, A_PCIE_MEM_ACCESS_OFFSET);
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for (i = 0; i < len; i += 4)
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*data++ = t4_read_reg(adap, (MEMWIN0_BASE + off + i));
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return 0;
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}
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/**
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* t4_mdio_rd - read a PHY register through MDIO
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* @adap: the adapter
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