iwlagn: move the NIC error flow to the transport layer

It is transport dependent, move to the PCIe transport layer.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 396 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-trans-rx-pcie.c b/drivers/net/wireless/iwlwifi/iwl-trans-rx-pcie.c
index 15e2645c2fb3..aa7ced4324b8 100644
--- a/drivers/net/wireless/iwlwifi/iwl-trans-rx-pcie.c
+++ b/drivers/net/wireless/iwlwifi/iwl-trans-rx-pcie.c
@@ -496,6 +496,402 @@ static void iwl_rx_handle(struct iwl_trans *trans)
                 iwlagn_rx_queue_restock(trans);
 }
 
+static const char * const desc_lookup_text[] = {
+        "OK",
+        "FAIL",
+        "BAD_PARAM",
+        "BAD_CHECKSUM",
+        "NMI_INTERRUPT_WDG",
+        "SYSASSERT",
+        "FATAL_ERROR",
+        "BAD_COMMAND",
+        "HW_ERROR_TUNE_LOCK",
+        "HW_ERROR_TEMPERATURE",
+        "ILLEGAL_CHAN_FREQ",
+        "VCC_NOT_STABLE",
+        "FH_ERROR",
+        "NMI_INTERRUPT_HOST",
+        "NMI_INTERRUPT_ACTION_PT",
+        "NMI_INTERRUPT_UNKNOWN",
+        "UCODE_VERSION_MISMATCH",
+        "HW_ERROR_ABS_LOCK",
+        "HW_ERROR_CAL_LOCK_FAIL",
+        "NMI_INTERRUPT_INST_ACTION_PT",
+        "NMI_INTERRUPT_DATA_ACTION_PT",
+        "NMI_TRM_HW_ER",
+        "NMI_INTERRUPT_TRM",
+        "NMI_INTERRUPT_BREAK_POINT",
+        "DEBUG_0",
+        "DEBUG_1",
+        "DEBUG_2",
+        "DEBUG_3",
+};
+
+static struct { char *name; u8 num; } advanced_lookup[] = {
+        { "NMI_INTERRUPT_WDG", 0x34 },
+        { "SYSASSERT", 0x35 },
+        { "UCODE_VERSION_MISMATCH", 0x37 },
+        { "BAD_COMMAND", 0x38 },
+        { "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C },
+        { "FATAL_ERROR", 0x3D },
+        { "NMI_TRM_HW_ERR", 0x46 },
+        { "NMI_INTERRUPT_TRM", 0x4C },
+        { "NMI_INTERRUPT_BREAK_POINT", 0x54 },
+        { "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C },
+        { "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64 },
+        { "NMI_INTERRUPT_HOST", 0x66 },
+        { "NMI_INTERRUPT_ACTION_PT", 0x7C },
+        { "NMI_INTERRUPT_UNKNOWN", 0x84 },
+        { "NMI_INTERRUPT_INST_ACTION_PT", 0x86 },
+        { "ADVANCED_SYSASSERT", 0 },
+};
+
+static const char *desc_lookup(u32 num)
+{
+        int i;
+        int max = ARRAY_SIZE(desc_lookup_text);
+
+        if (num < max)
+                return desc_lookup_text[num];
+
+        max = ARRAY_SIZE(advanced_lookup) - 1;
+        for (i = 0; i < max; i++) {
+                if (advanced_lookup[i].num == num)
+                        break;
+        }
+        return advanced_lookup[i].name;
+}
+
+#define ERROR_START_OFFSET  (1 * sizeof(u32))
+#define ERROR_ELEM_SIZE     (7 * sizeof(u32))
+
+static void iwl_dump_nic_error_log(struct iwl_priv *priv)
+{
+        u32 base;
+        struct iwl_error_event_table table;
+
+        base = priv->device_pointers.error_event_table;
+        if (priv->ucode_type == IWL_UCODE_INIT) {
+                if (!base)
+                        base = priv->init_errlog_ptr;
+        } else {
+                if (!base)
+                        base = priv->inst_errlog_ptr;
+        }
+
+        if (!iwlagn_hw_valid_rtc_data_addr(base)) {
+                IWL_ERR(priv,
+                        "Not valid error log pointer 0x%08X for %s uCode\n",
+                        base,
+                        (priv->ucode_type == IWL_UCODE_INIT)
+                                        ? "Init" : "RT");
+                return;
+        }
+
+        iwl_read_targ_mem_words(priv, base, &table, sizeof(table));
+
+        if (ERROR_START_OFFSET <= table.valid * ERROR_ELEM_SIZE) {
+                IWL_ERR(priv, "Start IWL Error Log Dump:\n");
+                IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
+                        priv->shrd->status, table.valid);
+        }
+
+        priv->isr_stats.err_code = table.error_id;
+
+        trace_iwlwifi_dev_ucode_error(priv, table.error_id, table.tsf_low,
+                                      table.data1, table.data2, table.line,
+                                      table.blink1, table.blink2, table.ilink1,
+                                      table.ilink2, table.bcon_time, table.gp1,
+                                      table.gp2, table.gp3, table.ucode_ver,
+                                      table.hw_ver, table.brd_ver);
+        IWL_ERR(priv, "0x%08X | %-28s\n", table.error_id,
+                desc_lookup(table.error_id));
+        IWL_ERR(priv, "0x%08X | uPc\n", table.pc);
+        IWL_ERR(priv, "0x%08X | branchlink1\n", table.blink1);
+        IWL_ERR(priv, "0x%08X | branchlink2\n", table.blink2);
+        IWL_ERR(priv, "0x%08X | interruptlink1\n", table.ilink1);
+        IWL_ERR(priv, "0x%08X | interruptlink2\n", table.ilink2);
+        IWL_ERR(priv, "0x%08X | data1\n", table.data1);
+        IWL_ERR(priv, "0x%08X | data2\n", table.data2);
+        IWL_ERR(priv, "0x%08X | line\n", table.line);
+        IWL_ERR(priv, "0x%08X | beacon time\n", table.bcon_time);
+        IWL_ERR(priv, "0x%08X | tsf low\n", table.tsf_low);
+        IWL_ERR(priv, "0x%08X | tsf hi\n", table.tsf_hi);
+        IWL_ERR(priv, "0x%08X | time gp1\n", table.gp1);
+        IWL_ERR(priv, "0x%08X | time gp2\n", table.gp2);
+        IWL_ERR(priv, "0x%08X | time gp3\n", table.gp3);
+        IWL_ERR(priv, "0x%08X | uCode version\n", table.ucode_ver);
+        IWL_ERR(priv, "0x%08X | hw version\n", table.hw_ver);
+        IWL_ERR(priv, "0x%08X | board version\n", table.brd_ver);
+        IWL_ERR(priv, "0x%08X | hcmd\n", table.hcmd);
+}
+
+/**
+ * iwl_irq_handle_error - called for HW or SW error interrupt from card
+ */
+static void iwl_irq_handle_error(struct iwl_priv *priv)
+{
+        /* W/A for WiFi/WiMAX coex and WiMAX own the RF */
+        if (priv->cfg->internal_wimax_coex &&
+            (!(iwl_read_prph(priv, APMG_CLK_CTRL_REG) &
+                        APMS_CLK_VAL_MRB_FUNC_MODE) ||
+             (iwl_read_prph(priv, APMG_PS_CTRL_REG) &
+                        APMG_PS_CTRL_VAL_RESET_REQ))) {
+                /*
+                 * Keep the restart process from trying to send host
+                 * commands by clearing the ready bit.
+                 */
+                clear_bit(STATUS_READY, &priv->shrd->status);
+                clear_bit(STATUS_HCMD_ACTIVE, &priv->shrd->status);
+                wake_up_interruptible(&priv->wait_command_queue);
+                IWL_ERR(priv, "RF is used by WiMAX\n");
+                return;
+        }
+
+        IWL_ERR(priv, "Loaded firmware version: %s\n",
+                priv->hw->wiphy->fw_version);
+
+        iwl_dump_nic_error_log(priv);
+        iwl_dump_csr(priv);
+        iwl_dump_fh(priv, NULL, false);
+        iwl_dump_nic_event_log(priv, false, NULL, false);
+#ifdef CONFIG_IWLWIFI_DEBUG
+        if (iwl_get_debug_level(priv->shrd) & IWL_DL_FW_ERRORS)
+                iwl_print_rx_config_cmd(priv,
+                                        &priv->contexts[IWL_RXON_CTX_BSS]);
+#endif
+
+        iwlagn_fw_error(priv, false);
+}
+
+#define EVENT_START_OFFSET  (4 * sizeof(u32))
+
+/**
+ * iwl_print_event_log - Dump error event log to syslog
+ *
+ */
+static int iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
+                               u32 num_events, u32 mode,
+                               int pos, char **buf, size_t bufsz)
+{
+        u32 i;
+        u32 base;       /* SRAM byte address of event log header */
+        u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
+        u32 ptr;        /* SRAM byte address of log data */
+        u32 ev, time, data; /* event log data */
+        unsigned long reg_flags;
+
+        if (num_events == 0)
+                return pos;
+
+        base = priv->device_pointers.log_event_table;
+        if (priv->ucode_type == IWL_UCODE_INIT) {
+                if (!base)
+                        base = priv->init_evtlog_ptr;
+        } else {
+                if (!base)
+                        base = priv->inst_evtlog_ptr;
+        }
+
+        if (mode == 0)
+                event_size = 2 * sizeof(u32);
+        else
+                event_size = 3 * sizeof(u32);
+
+        ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
+
+        /* Make sure device is powered up for SRAM reads */
+        spin_lock_irqsave(&priv->reg_lock, reg_flags);
+        iwl_grab_nic_access(priv);
+
+        /* Set starting address; reads will auto-increment */
+        iwl_write32(priv, HBUS_TARG_MEM_RADDR, ptr);
+        rmb();
+
+        /* "time" is actually "data" for mode 0 (no timestamp).
+        * place event id # at far right for easier visual parsing. */
+        for (i = 0; i < num_events; i++) {
+                ev = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
+                time = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
+                if (mode == 0) {
+                        /* data, ev */
+                        if (bufsz) {
+                                pos += scnprintf(*buf + pos, bufsz - pos,
+                                                "EVT_LOG:0x%08x:%04u\n",
+                                                time, ev);
+                        } else {
+                                trace_iwlwifi_dev_ucode_event(priv, 0,
+                                        time, ev);
+                                IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n",
+                                        time, ev);
+                        }
+                } else {
+                        data = iwl_read32(priv, HBUS_TARG_MEM_RDAT);
+                        if (bufsz) {
+                                pos += scnprintf(*buf + pos, bufsz - pos,
+                                                "EVT_LOGT:%010u:0x%08x:%04u\n",
+                                                 time, data, ev);
+                        } else {
+                                IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
+                                        time, data, ev);
+                                trace_iwlwifi_dev_ucode_event(priv, time,
+                                        data, ev);
+                        }
+                }
+        }
+
+        /* Allow device to power down */
+        iwl_release_nic_access(priv);
+        spin_unlock_irqrestore(&priv->reg_lock, reg_flags);
+        return pos;
+}
+
+/**
+ * iwl_print_last_event_logs - Dump the newest # of event log to syslog
+ */
+static int iwl_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
+                                    u32 num_wraps, u32 next_entry,
+                                    u32 size, u32 mode,
+                                    int pos, char **buf, size_t bufsz)
+{
+        /*
+         * display the newest DEFAULT_LOG_ENTRIES entries
+         * i.e the entries just before the next ont that uCode would fill.
+         */
+        if (num_wraps) {
+                if (next_entry < size) {
+                        pos = iwl_print_event_log(priv,
+                                                capacity - (size - next_entry),
+                                                size - next_entry, mode,
+                                                pos, buf, bufsz);
+                        pos = iwl_print_event_log(priv, 0,
+                                                  next_entry, mode,
+                                                  pos, buf, bufsz);
+                } else
+                        pos = iwl_print_event_log(priv, next_entry - size,
+                                                  size, mode, pos, buf, bufsz);
+        } else {
+                if (next_entry < size) {
+                        pos = iwl_print_event_log(priv, 0, next_entry,
+                                                  mode, pos, buf, bufsz);
+                } else {
+                        pos = iwl_print_event_log(priv, next_entry - size,
+                                                  size, mode, pos, buf, bufsz);
+                }
+        }
+        return pos;
+}
+
+#define DEFAULT_DUMP_EVENT_LOG_ENTRIES (20)
+
+int iwl_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
+                            char **buf, bool display)
+{
+        u32 base;       /* SRAM byte address of event log header */
+        u32 capacity;   /* event log capacity in # entries */
+        u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
+        u32 num_wraps;  /* # times uCode wrapped to top of log */
+        u32 next_entry; /* index of next entry to be written by uCode */
+        u32 size;       /* # entries that we'll print */
+        u32 logsize;
+        int pos = 0;
+        size_t bufsz = 0;
+
+        base = priv->device_pointers.log_event_table;
+        if (priv->ucode_type == IWL_UCODE_INIT) {
+                logsize = priv->init_evtlog_size;
+                if (!base)
+                        base = priv->init_evtlog_ptr;
+        } else {
+                logsize = priv->inst_evtlog_size;
+                if (!base)
+                        base = priv->inst_evtlog_ptr;
+        }
+
+        if (!iwlagn_hw_valid_rtc_data_addr(base)) {
+                IWL_ERR(priv,
+                        "Invalid event log pointer 0x%08X for %s uCode\n",
+                        base,
+                        (priv->ucode_type == IWL_UCODE_INIT)
+                                        ? "Init" : "RT");
+                return -EINVAL;
+        }
+
+        /* event log header */
+        capacity = iwl_read_targ_mem(priv, base);
+        mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
+        num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
+        next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
+
+        if (capacity > logsize) {
+                IWL_ERR(priv, "Log capacity %d is bogus, limit to %d entries\n",
+                        capacity, logsize);
+                capacity = logsize;
+        }
+
+        if (next_entry > logsize) {
+                IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
+                        next_entry, logsize);
+                next_entry = logsize;
+        }
+
+        size = num_wraps ? capacity : next_entry;
+
+        /* bail out if nothing in log */
+        if (size == 0) {
+                IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
+                return pos;
+        }
+
+        /* enable/disable bt channel inhibition */
+        priv->bt_ch_announce = iwlagn_mod_params.bt_ch_announce;
+
+#ifdef CONFIG_IWLWIFI_DEBUG
+        if (!(iwl_get_debug_level(priv->shrd) & IWL_DL_FW_ERRORS) && !full_log)
+                size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
+                        ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
+#else
+        size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
+                ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
+#endif
+        IWL_ERR(priv, "Start IWL Event Log Dump: display last %u entries\n",
+                size);
+
+#ifdef CONFIG_IWLWIFI_DEBUG
+        if (display) {
+                if (full_log)
+                        bufsz = capacity * 48;
+                else
+                        bufsz = size * 48;
+                *buf = kmalloc(bufsz, GFP_KERNEL);
+                if (!*buf)
+                        return -ENOMEM;
+        }
+        if ((iwl_get_debug_level(priv->shrd) & IWL_DL_FW_ERRORS) || full_log) {
+                /*
+                 * if uCode has wrapped back to top of log,
+                 * start at the oldest entry,
+                 * i.e the next one that uCode would fill.
+                 */
+                if (num_wraps)
+                        pos = iwl_print_event_log(priv, next_entry,
+                                                capacity - next_entry, mode,
+                                                pos, buf, bufsz);
+                /* (then/else) start at top of log */
+                pos = iwl_print_event_log(priv, 0,
+                                          next_entry, mode, pos, buf, bufsz);
+        } else
+                pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
+                                                next_entry, size, mode,
+                                                pos, buf, bufsz);
+#else
+        pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
+                                        next_entry, size, mode,
+                                        pos, buf, bufsz);
+#endif
+        return pos;
+}
+
 /* tasklet for iwlagn interrupt */
 void iwl_irq_tasklet(struct iwl_trans *trans)
 {