staging: qlge: coredump via devlink health reporter

    $ devlink health dump show DEVICE reporter coredump -p -j
    {
        "Core Registers": {
            "segment": 1,
            "values": [ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 ]
        },
        "Test Logic Regs": {
            "segment": 2,
            "values": [ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 ]
        },
        "RMII Registers": {
            "segment": 3,
            "values": [ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 ]
        },
        ...
        "Sem Registers": {
            "segment": 50,
            "values": [ 0,0,0,0 ]
        }
    }
Signed-off-by: Coiby Xu <coiby.xu@gmail.com>
Link: https://lore.kernel.org/r/20210123104613.38359-5-coiby.xu@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/qlge/qlge_devlink.c

@@ -2,16 +2,136 @@
 #include "qlge.h"
 #include "qlge_devlink.h"
 
-static int
-qlge_reporter_coredump(struct devlink_health_reporter *reporter,
-		       struct devlink_fmsg *fmsg, void *priv_ctx,
-		       struct netlink_ext_ack *extack)
+static int qlge_fill_seg_(struct devlink_fmsg *fmsg,
+			  struct mpi_coredump_segment_header *seg_header,
+			  u32 *reg_data)
 {
-	return 0;
+	int regs_num = (seg_header->seg_size
+			- sizeof(struct mpi_coredump_segment_header)) / sizeof(u32);
+	int err;
+	int i;
+
+	err = devlink_fmsg_pair_nest_start(fmsg, seg_header->description);
+	if (err)
+		return err;
+	err = devlink_fmsg_obj_nest_start(fmsg);
+	if (err)
+		return err;
+	err = devlink_fmsg_u32_pair_put(fmsg, "segment", seg_header->seg_num);
+	if (err)
+		return err;
+	err = devlink_fmsg_arr_pair_nest_start(fmsg, "values");
+	if (err)
+		return err;
+	for (i = 0; i < regs_num; i++) {
+		err = devlink_fmsg_u32_put(fmsg, *reg_data);
+		if (err)
+			return err;
+		reg_data++;
+	}
+	err = devlink_fmsg_obj_nest_end(fmsg);
+	if (err)
+		return err;
+	err = devlink_fmsg_arr_pair_nest_end(fmsg);
+	if (err)
+		return err;
+	err = devlink_fmsg_pair_nest_end(fmsg);
+	return err;
+}
+
+#define FILL_SEG(seg_hdr, seg_regs)			                    \
+	do {                                                                \
+		err = qlge_fill_seg_(fmsg, &dump->seg_hdr, dump->seg_regs); \
+		if (err) {					            \
+			kvfree(dump);                                       \
+			return err;				            \
+		}                                                           \
+	} while (0)
+
+static int qlge_reporter_coredump(struct devlink_health_reporter *reporter,
+				  struct devlink_fmsg *fmsg, void *priv_ctx,
+				  struct netlink_ext_ack *extack)
+{
+	int err = 0;
+
+	struct qlge_adapter *qdev = devlink_health_reporter_priv(reporter);
+	struct qlge_mpi_coredump *dump;
+
+	if (!netif_running(qdev->ndev))
+		return 0;
+
+	dump = kvmalloc(sizeof(*dump), GFP_KERNEL);
+	if (!dump)
+		return -ENOMEM;
+
+	err = qlge_core_dump(qdev, dump);
+	if (err) {
+		kvfree(dump);
+		return err;
+	}
+
+	qlge_soft_reset_mpi_risc(qdev);
+
+	FILL_SEG(core_regs_seg_hdr, mpi_core_regs);
+	FILL_SEG(test_logic_regs_seg_hdr, test_logic_regs);
+	FILL_SEG(rmii_regs_seg_hdr, rmii_regs);
+	FILL_SEG(fcmac1_regs_seg_hdr, fcmac1_regs);
+	FILL_SEG(fcmac2_regs_seg_hdr, fcmac2_regs);
+	FILL_SEG(fc1_mbx_regs_seg_hdr, fc1_mbx_regs);
+	FILL_SEG(ide_regs_seg_hdr, ide_regs);
+	FILL_SEG(nic1_mbx_regs_seg_hdr, nic1_mbx_regs);
+	FILL_SEG(smbus_regs_seg_hdr, smbus_regs);
+	FILL_SEG(fc2_mbx_regs_seg_hdr, fc2_mbx_regs);
+	FILL_SEG(nic2_mbx_regs_seg_hdr, nic2_mbx_regs);
+	FILL_SEG(i2c_regs_seg_hdr, i2c_regs);
+	FILL_SEG(memc_regs_seg_hdr, memc_regs);
+	FILL_SEG(pbus_regs_seg_hdr, pbus_regs);
+	FILL_SEG(mde_regs_seg_hdr, mde_regs);
+	FILL_SEG(nic_regs_seg_hdr, nic_regs);
+	FILL_SEG(nic2_regs_seg_hdr, nic2_regs);
+	FILL_SEG(xgmac1_seg_hdr, xgmac1);
+	FILL_SEG(xgmac2_seg_hdr, xgmac2);
+	FILL_SEG(code_ram_seg_hdr, code_ram);
+	FILL_SEG(memc_ram_seg_hdr, memc_ram);
+	FILL_SEG(xaui_an_hdr, serdes_xaui_an);
+	FILL_SEG(xaui_hss_pcs_hdr, serdes_xaui_hss_pcs);
+	FILL_SEG(xfi_an_hdr, serdes_xfi_an);
+	FILL_SEG(xfi_train_hdr, serdes_xfi_train);
+	FILL_SEG(xfi_hss_pcs_hdr, serdes_xfi_hss_pcs);
+	FILL_SEG(xfi_hss_tx_hdr, serdes_xfi_hss_tx);
+	FILL_SEG(xfi_hss_rx_hdr, serdes_xfi_hss_rx);
+	FILL_SEG(xfi_hss_pll_hdr, serdes_xfi_hss_pll);
+
+	err = qlge_fill_seg_(fmsg, &dump->misc_nic_seg_hdr,
+			     (u32 *)&dump->misc_nic_info);
+	if (err) {
+		kvfree(dump);
+		return err;
+	}
+
+	FILL_SEG(intr_states_seg_hdr, intr_states);
+	FILL_SEG(cam_entries_seg_hdr, cam_entries);
+	FILL_SEG(nic_routing_words_seg_hdr, nic_routing_words);
+	FILL_SEG(ets_seg_hdr, ets);
+	FILL_SEG(probe_dump_seg_hdr, probe_dump);
+	FILL_SEG(routing_reg_seg_hdr, routing_regs);
+	FILL_SEG(mac_prot_reg_seg_hdr, mac_prot_regs);
+	FILL_SEG(xaui2_an_hdr, serdes2_xaui_an);
+	FILL_SEG(xaui2_hss_pcs_hdr, serdes2_xaui_hss_pcs);
+	FILL_SEG(xfi2_an_hdr, serdes2_xfi_an);
+	FILL_SEG(xfi2_train_hdr, serdes2_xfi_train);
+	FILL_SEG(xfi2_hss_pcs_hdr, serdes2_xfi_hss_pcs);
+	FILL_SEG(xfi2_hss_tx_hdr, serdes2_xfi_hss_tx);
+	FILL_SEG(xfi2_hss_rx_hdr, serdes2_xfi_hss_rx);
+	FILL_SEG(xfi2_hss_pll_hdr, serdes2_xfi_hss_pll);
+	FILL_SEG(sem_regs_seg_hdr, sem_regs);
+
+	kvfree(dump);
+	return err;
 }
 
 static const struct devlink_health_reporter_ops qlge_reporter_ops = {
-	.name = "dummy",
+	.name = "coredump",
 	.dump = qlge_reporter_coredump,
 };