[SCSI] ipr: Add support for logging SAS fabric errors

Adds support for logging SAS fabric errors logged by
the ipr firmware.

Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

2 files changed, 290 insertions, 7 deletions

diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index e53cfbd0e076..94345e79ef1e 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -1321,6 +1321,219 @@ static void ipr_log_dual_ioa_error(struct ipr_ioa_cfg *ioa_cfg,
                           offsetof(struct ipr_hostrcb_type_07_error, data)));
 }
 
+static const struct {
+        u8 active;
+        char *desc;
+} path_active_desc[] = {
+        { IPR_PATH_NO_INFO, "Path" },
+        { IPR_PATH_ACTIVE, "Active path" },
+        { IPR_PATH_NOT_ACTIVE, "Inactive path" }
+};
+
+static const struct {
+        u8 state;
+        char *desc;
+} path_state_desc[] = {
+        { IPR_PATH_STATE_NO_INFO, "has no path state information available" },
+        { IPR_PATH_HEALTHY, "is healthy" },
+        { IPR_PATH_DEGRADED, "is degraded" },
+        { IPR_PATH_FAILED, "is failed" }
+};
+
+/**
+ * ipr_log_fabric_path - Log a fabric path error
+ * @hostrcb:    hostrcb struct
+ * @fabric:             fabric descriptor
+ *
+ * Return value:
+ *      none
+ **/
+static void ipr_log_fabric_path(struct ipr_hostrcb *hostrcb,
+                                struct ipr_hostrcb_fabric_desc *fabric)
+{
+        int i, j;
+        u8 path_state = fabric->path_state;
+        u8 active = path_state & IPR_PATH_ACTIVE_MASK;
+        u8 state = path_state & IPR_PATH_STATE_MASK;
+
+        for (i = 0; i < ARRAY_SIZE(path_active_desc); i++) {
+                if (path_active_desc[i].active != active)
+                        continue;
+
+                for (j = 0; j < ARRAY_SIZE(path_state_desc); j++) {
+                        if (path_state_desc[j].state != state)
+                                continue;
+
+                        if (fabric->cascaded_expander == 0xff && fabric->phy == 0xff) {
+                                ipr_hcam_err(hostrcb, "%s %s: IOA Port=%d\n",
+                                             path_active_desc[i].desc, path_state_desc[j].desc,
+                                             fabric->ioa_port);
+                        } else if (fabric->cascaded_expander == 0xff) {
+                                ipr_hcam_err(hostrcb, "%s %s: IOA Port=%d, Phy=%d\n",
+                                             path_active_desc[i].desc, path_state_desc[j].desc,
+                                             fabric->ioa_port, fabric->phy);
+                        } else if (fabric->phy == 0xff) {
+                                ipr_hcam_err(hostrcb, "%s %s: IOA Port=%d, Cascade=%d\n",
+                                             path_active_desc[i].desc, path_state_desc[j].desc,
+                                             fabric->ioa_port, fabric->cascaded_expander);
+                        } else {
+                                ipr_hcam_err(hostrcb, "%s %s: IOA Port=%d, Cascade=%d, Phy=%d\n",
+                                             path_active_desc[i].desc, path_state_desc[j].desc,
+                                             fabric->ioa_port, fabric->cascaded_expander, fabric->phy);
+                        }
+                        return;
+                }
+        }
+
+        ipr_err("Path state=%02X IOA Port=%d Cascade=%d Phy=%d\n", path_state,
+                fabric->ioa_port, fabric->cascaded_expander, fabric->phy);
+}
+
+static const struct {
+        u8 type;
+        char *desc;
+} path_type_desc[] = {
+        { IPR_PATH_CFG_IOA_PORT, "IOA port" },
+        { IPR_PATH_CFG_EXP_PORT, "Expander port" },
+        { IPR_PATH_CFG_DEVICE_PORT, "Device port" },
+        { IPR_PATH_CFG_DEVICE_LUN, "Device LUN" }
+};
+
+static const struct {
+        u8 status;
+        char *desc;
+} path_status_desc[] = {
+        { IPR_PATH_CFG_NO_PROB, "Functional" },
+        { IPR_PATH_CFG_DEGRADED, "Degraded" },
+        { IPR_PATH_CFG_FAILED, "Failed" },
+        { IPR_PATH_CFG_SUSPECT, "Suspect" },
+        { IPR_PATH_NOT_DETECTED, "Missing" },
+        { IPR_PATH_INCORRECT_CONN, "Incorrectly connected" }
+};
+
+static const char *link_rate[] = {
+        "unknown",
+        "disabled",
+        "phy reset problem",
+        "spinup hold",
+        "port selector",
+        "unknown",
+        "unknown",
+        "unknown",
+        "1.5Gbps",
+        "3.0Gbps",
+        "unknown",
+        "unknown",
+        "unknown",
+        "unknown",
+        "unknown",
+        "unknown"
+};
+
+/**
+ * ipr_log_path_elem - Log a fabric path element.
+ * @hostrcb:    hostrcb struct
+ * @cfg:                fabric path element struct
+ *
+ * Return value:
+ *      none
+ **/
+static void ipr_log_path_elem(struct ipr_hostrcb *hostrcb,
+                              struct ipr_hostrcb_config_element *cfg)
+{
+        int i, j;
+        u8 type = cfg->type_status & IPR_PATH_CFG_TYPE_MASK;
+        u8 status = cfg->type_status & IPR_PATH_CFG_STATUS_MASK;
+
+        if (type == IPR_PATH_CFG_NOT_EXIST)
+                return;
+
+        for (i = 0; i < ARRAY_SIZE(path_type_desc); i++) {
+                if (path_type_desc[i].type != type)
+                        continue;
+
+                for (j = 0; j < ARRAY_SIZE(path_status_desc); j++) {
+                        if (path_status_desc[j].status != status)
+                                continue;
+
+                        if (type == IPR_PATH_CFG_IOA_PORT) {
+                                ipr_hcam_err(hostrcb, "%s %s: Phy=%d, Link rate=%s, WWN=%08X%08X\n",
+                                             path_status_desc[j].desc, path_type_desc[i].desc,
+                                             cfg->phy, link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
+                                             be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
+                        } else {
+                                if (cfg->cascaded_expander == 0xff && cfg->phy == 0xff) {
+                                        ipr_hcam_err(hostrcb, "%s %s: Link rate=%s, WWN=%08X%08X\n",
+                                                     path_status_desc[j].desc, path_type_desc[i].desc,
+                                                     link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
+                                                     be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
+                                } else if (cfg->cascaded_expander == 0xff) {
+                                        ipr_hcam_err(hostrcb, "%s %s: Phy=%d, Link rate=%s, "
+                                                     "WWN=%08X%08X\n", path_status_desc[j].desc,
+                                                     path_type_desc[i].desc, cfg->phy,
+                                                     link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
+                                                     be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
+                                } else if (cfg->phy == 0xff) {
+                                        ipr_hcam_err(hostrcb, "%s %s: Cascade=%d, Link rate=%s, "
+                                                     "WWN=%08X%08X\n", path_status_desc[j].desc,
+                                                     path_type_desc[i].desc, cfg->cascaded_expander,
+                                                     link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
+                                                     be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
+                                } else {
+                                        ipr_hcam_err(hostrcb, "%s %s: Cascade=%d, Phy=%d, Link rate=%s "
+                                                     "WWN=%08X%08X\n", path_status_desc[j].desc,
+                                                     path_type_desc[i].desc, cfg->cascaded_expander, cfg->phy,
+                                                     link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
+                                                     be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
+                                }
+                        }
+                        return;
+                }
+        }
+
+        ipr_hcam_err(hostrcb, "Path element=%02X: Cascade=%d Phy=%d Link rate=%s "
+                     "WWN=%08X%08X\n", cfg->type_status, cfg->cascaded_expander, cfg->phy,
+                     link_rate[cfg->link_rate & IPR_PHY_LINK_RATE_MASK],
+                     be32_to_cpu(cfg->wwid[0]), be32_to_cpu(cfg->wwid[1]));
+}
+
+/**
+ * ipr_log_fabric_error - Log a fabric error.
+ * @ioa_cfg:    ioa config struct
+ * @hostrcb:    hostrcb struct
+ *
+ * Return value:
+ *      none
+ **/
+static void ipr_log_fabric_error(struct ipr_ioa_cfg *ioa_cfg,
+                                 struct ipr_hostrcb *hostrcb)
+{
+        struct ipr_hostrcb_type_20_error *error;
+        struct ipr_hostrcb_fabric_desc *fabric;
+        struct ipr_hostrcb_config_element *cfg;
+        int i, add_len;
+
+        error = &hostrcb->hcam.u.error.u.type_20_error;
+        error->failure_reason[sizeof(error->failure_reason) - 1] = '\0';
+        ipr_hcam_err(hostrcb, "%s\n", error->failure_reason);
+
+        add_len = be32_to_cpu(hostrcb->hcam.length) -
+                (offsetof(struct ipr_hostrcb_error, u) +
+                 offsetof(struct ipr_hostrcb_type_20_error, desc));
+
+        for (i = 0, fabric = error->desc; i < error->num_entries; i++) {
+                ipr_log_fabric_path(hostrcb, fabric);
+                for_each_fabric_cfg(fabric, cfg)
+                        ipr_log_path_elem(hostrcb, cfg);
+
+                add_len -= be16_to_cpu(fabric->length);
+                fabric = (struct ipr_hostrcb_fabric_desc *)
+                        ((unsigned long)fabric + be16_to_cpu(fabric->length));
+        }
+
+        ipr_log_hex_data((u32 *)fabric, add_len);
+}
+
 /**
  * ipr_log_generic_error - Log an adapter error.
  * @ioa_cfg:    ioa config struct
@@ -1394,13 +1607,7 @@ static void ipr_handle_log_data(struct ipr_ioa_cfg *ioa_cfg,
         if (!ipr_error_table[error_index].log_hcam)
                 return;
 
-        if (ipr_is_device(&hostrcb->hcam.u.error.failing_dev_res_addr)) {
-                ipr_ra_err(ioa_cfg, hostrcb->hcam.u.error.failing_dev_res_addr,
-                           "%s\n", ipr_error_table[error_index].error);
-        } else {
-                dev_err(&ioa_cfg->pdev->dev, "%s\n",
-                        ipr_error_table[error_index].error);
-        }
+        ipr_hcam_err(hostrcb, "%s\n", ipr_error_table[error_index].error);
 
         /* Set indication we have logged an error */
         ioa_cfg->errors_logged++;
@@ -1437,6 +1644,9 @@ static void ipr_handle_log_data(struct ipr_ioa_cfg *ioa_cfg,
         case IPR_HOST_RCB_OVERLAY_ID_17:
                 ipr_log_enhanced_dual_ioa_error(ioa_cfg, hostrcb);
                 break;
+        case IPR_HOST_RCB_OVERLAY_ID_20:
+                ipr_log_fabric_error(ioa_cfg, hostrcb);
+                break;
         case IPR_HOST_RCB_OVERLAY_ID_1:
         case IPR_HOST_RCB_OVERLAY_ID_DEFAULT:
         default:
@@ -6812,6 +7022,7 @@ static int __devinit ipr_alloc_mem(struct ipr_ioa_cfg *ioa_cfg)
 
                 ioa_cfg->hostrcb[i]->hostrcb_dma =
                         ioa_cfg->hostrcb_dma[i] + offsetof(struct ipr_hostrcb, hcam);
+                ioa_cfg->hostrcb[i]->ioa_cfg = ioa_cfg;
                 list_add_tail(&ioa_cfg->hostrcb[i]->queue, &ioa_cfg->hostrcb_free_q);
         }
 
diff --git a/drivers/scsi/ipr.h b/drivers/scsi/ipr.h
index 75669251fb63..44b15e4b6edf 100644
--- a/drivers/scsi/ipr.h
+++ b/drivers/scsi/ipr.h
@@ -737,6 +737,64 @@ struct ipr_hostrcb_type_17_error {
         u32 data[476];
 }__attribute__((packed, aligned (4)));
 
+struct ipr_hostrcb_config_element {
+        u8 type_status;
+#define IPR_PATH_CFG_TYPE_MASK  0xF0
+#define IPR_PATH_CFG_NOT_EXIST  0x00
+#define IPR_PATH_CFG_IOA_PORT           0x10
+#define IPR_PATH_CFG_EXP_PORT           0x20
+#define IPR_PATH_CFG_DEVICE_PORT        0x30
+#define IPR_PATH_CFG_DEVICE_LUN 0x40
+
+#define IPR_PATH_CFG_STATUS_MASK        0x0F
+#define IPR_PATH_CFG_NO_PROB            0x00
+#define IPR_PATH_CFG_DEGRADED           0x01
+#define IPR_PATH_CFG_FAILED             0x02
+#define IPR_PATH_CFG_SUSPECT            0x03
+#define IPR_PATH_NOT_DETECTED           0x04
+#define IPR_PATH_INCORRECT_CONN 0x05
+
+        u8 cascaded_expander;
+        u8 phy;
+        u8 link_rate;
+#define IPR_PHY_LINK_RATE_MASK  0x0F
+
+        __be32 wwid[2];
+}__attribute__((packed, aligned (4)));
+
+struct ipr_hostrcb_fabric_desc {
+        __be16 length;
+        u8 ioa_port;
+        u8 cascaded_expander;
+        u8 phy;
+        u8 path_state;
+#define IPR_PATH_ACTIVE_MASK            0xC0
+#define IPR_PATH_NO_INFO                0x00
+#define IPR_PATH_ACTIVE                 0x40
+#define IPR_PATH_NOT_ACTIVE             0x80
+
+#define IPR_PATH_STATE_MASK             0x0F
+#define IPR_PATH_STATE_NO_INFO  0x00
+#define IPR_PATH_HEALTHY                0x01
+#define IPR_PATH_DEGRADED               0x02
+#define IPR_PATH_FAILED                 0x03
+
+        __be16 num_entries;
+        struct ipr_hostrcb_config_element elem[1];
+}__attribute__((packed, aligned (4)));
+
+#define for_each_fabric_cfg(fabric, cfg) \
+                for (cfg = (fabric)->elem; \
+                        cfg < ((fabric)->elem + be16_to_cpu((fabric)->num_entries)); \
+                        cfg++)
+
+struct ipr_hostrcb_type_20_error {
+        u8 failure_reason[64];
+        u8 reserved[3];
+        u8 num_entries;
+        struct ipr_hostrcb_fabric_desc desc[1];
+}__attribute__((packed, aligned (4)));
+
 struct ipr_hostrcb_error {
         __be32 failing_dev_ioasc;
         struct ipr_res_addr failing_dev_res_addr;
@@ -753,6 +811,7 @@ struct ipr_hostrcb_error {
                 struct ipr_hostrcb_type_13_error type_13_error;
                 struct ipr_hostrcb_type_14_error type_14_error;
                 struct ipr_hostrcb_type_17_error type_17_error;
+                struct ipr_hostrcb_type_20_error type_20_error;
         } u;
 }__attribute__((packed, aligned (4)));
 
@@ -792,6 +851,7 @@ struct ipr_hcam {
 #define IPR_HOST_RCB_OVERLAY_ID_14                              0x14
 #define IPR_HOST_RCB_OVERLAY_ID_16                              0x16
 #define IPR_HOST_RCB_OVERLAY_ID_17                              0x17
+#define IPR_HOST_RCB_OVERLAY_ID_20                              0x20
 #define IPR_HOST_RCB_OVERLAY_ID_DEFAULT                 0xFF
 
         u8 reserved1[3];
@@ -811,6 +871,7 @@ struct ipr_hostrcb {
         struct ipr_hcam hcam;
         dma_addr_t hostrcb_dma;
         struct list_head queue;
+        struct ipr_ioa_cfg *ioa_cfg;
 };
 
 /* IPR smart dump table structures */
@@ -1289,6 +1350,17 @@ struct ipr_ucode_image_header {
         }                                                               \
 }
 
+#define ipr_hcam_err(hostrcb, fmt, ...)                                 \
+{                                                                                                       \
+        if (ipr_is_device(&(hostrcb)->hcam.u.error.failing_dev_res_addr)) {             \
+                ipr_ra_err((hostrcb)->ioa_cfg,                                                  \
+                                (hostrcb)->hcam.u.error.failing_dev_res_addr,                   \
+                                fmt, ##__VA_ARGS__);                                                    \
+        } else {                                                                                        \
+                dev_err(&(hostrcb)->ioa_cfg->pdev->dev, fmt, ##__VA_ARGS__);            \
+        }                                                                                               \
+}
+
 #define ipr_trace ipr_dbg("%s: %s: Line: %d\n",\
         __FILE__, __FUNCTION__, __LINE__)