[SCSI] qla2xxx: Add host-statistics FC transport attributes.

Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

6 files changed, 147 insertions, 7 deletions

diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c
index 55016328bd78..5a8d5c4c69ba 100644
--- a/drivers/scsi/qla2xxx/qla_attr.c
+++ b/drivers/scsi/qla2xxx/qla_attr.c
@@ -7,7 +7,6 @@
 #include "qla_def.h"
 
 #include <linux/vmalloc.h>
-#include <scsi/scsi_transport_fc.h>
 
 /* SYSFS attributes --------------------------------------------------------- */
 
@@ -555,6 +554,41 @@ qla2x00_issue_lip(struct Scsi_Host *shost)
         return 0;
 }
 
+static struct fc_host_statistics *
+qla2x00_get_fc_host_stats(struct Scsi_Host *shost)
+{
+        scsi_qla_host_t *ha = to_qla_host(shost);
+        int rval;
+        uint16_t mb_stat[1];
+        link_stat_t stat_buf;
+        struct fc_host_statistics *pfc_host_stat;
+
+        pfc_host_stat = &ha->fc_host_stat;
+        memset(pfc_host_stat, -1, sizeof(struct fc_host_statistics));
+
+        if (IS_QLA24XX(ha) || IS_QLA25XX(ha)) {
+                rval = qla24xx_get_isp_stats(ha, (uint32_t *)&stat_buf,
+                    sizeof(stat_buf) / 4, mb_stat);
+        } else {
+                rval = qla2x00_get_link_status(ha, ha->loop_id, &stat_buf,
+                    mb_stat);
+        }
+        if (rval != 0) {
+                qla_printk(KERN_WARNING, ha,
+                    "Unable to retrieve host statistics (%d).\n", mb_stat[0]);
+                return pfc_host_stat;
+        }
+
+        pfc_host_stat->link_failure_count = stat_buf.link_fail_cnt;
+        pfc_host_stat->loss_of_sync_count = stat_buf.loss_sync_cnt;
+        pfc_host_stat->loss_of_signal_count = stat_buf.loss_sig_cnt;
+        pfc_host_stat->prim_seq_protocol_err_count = stat_buf.prim_seq_err_cnt;
+        pfc_host_stat->invalid_tx_word_count = stat_buf.inval_xmit_word_cnt;
+        pfc_host_stat->invalid_crc_count = stat_buf.inval_crc_cnt;
+
+        return pfc_host_stat;
+}
+
 struct fc_function_template qla2xxx_transport_functions = {
 
         .show_host_node_name = 1,
@@ -583,6 +617,7 @@ struct fc_function_template qla2xxx_transport_functions = {
         .show_rport_dev_loss_tmo = 1,
 
         .issue_fc_host_lip = qla2x00_issue_lip,
+        .get_fc_host_stats = qla2x00_get_fc_host_stats,
 };
 
 void
diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index 26af5319c219..414580800dc0 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -29,6 +29,7 @@
 #include <scsi/scsi_host.h>
 #include <scsi/scsi_device.h>
 #include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_transport_fc.h>
 
 #if defined(CONFIG_SCSI_QLA2XXX_EMBEDDED_FIRMWARE)
 #if defined(CONFIG_SCSI_QLA21XX) || defined(CONFIG_SCSI_QLA21XX_MODULE)
@@ -2496,6 +2497,7 @@ typedef struct scsi_qla_host {
 
         uint16_t        zio_mode;
         uint16_t        zio_timer;
+        struct fc_host_statistics fc_host_stat;
 } scsi_qla_host_t;
 
 
diff --git a/drivers/scsi/qla2xxx/qla_gbl.h b/drivers/scsi/qla2xxx/qla_gbl.h
index 35266bd5d538..f2f5454a05e9 100644
--- a/drivers/scsi/qla2xxx/qla_gbl.h
+++ b/drivers/scsi/qla2xxx/qla_gbl.h
@@ -185,6 +185,13 @@ qla2x00_get_resource_cnts(scsi_qla_host_t *, uint16_t *, uint16_t *, uint16_t *,
 extern int
 qla2x00_get_fcal_position_map(scsi_qla_host_t *ha, char *pos_map);
 
+extern int
+qla2x00_get_link_status(scsi_qla_host_t *, uint16_t, link_stat_t *,
+    uint16_t *);
+
+extern int
+qla24xx_get_isp_stats(scsi_qla_host_t *, uint32_t *, uint32_t, uint16_t *);
+
 extern int qla24xx_abort_command(scsi_qla_host_t *, srb_t *);
 extern int qla24xx_abort_target(fc_port_t *);
 
diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index e67bb0997818..634ee174bff2 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -8,7 +8,6 @@
 
 #include <linux/delay.h>
 #include <linux/vmalloc.h>
-#include <scsi/scsi_transport_fc.h>
 
 #include "qla_devtbl.h"
 
diff --git a/drivers/scsi/qla2xxx/qla_mbx.c b/drivers/scsi/qla2xxx/qla_mbx.c
index 3099b379de9d..49ce197876b4 100644
--- a/drivers/scsi/qla2xxx/qla_mbx.c
+++ b/drivers/scsi/qla2xxx/qla_mbx.c
@@ -7,7 +7,6 @@
 #include "qla_def.h"
 
 #include <linux/delay.h>
-#include <scsi/scsi_transport_fc.h>
 
 static void
 qla2x00_mbx_sem_timeout(unsigned long data)
@@ -2017,8 +2016,109 @@ qla2x00_get_fcal_position_map(scsi_qla_host_t *ha, char *pos_map)
 
         return rval;
 }
+#endif
+
+/*
+ * qla2x00_get_link_status
+ *
+ * Input:
+ *      ha = adapter block pointer.
+ *      loop_id = device loop ID.
+ *      ret_buf = pointer to link status return buffer.
+ *
+ * Returns:
+ *      0 = success.
+ *      BIT_0 = mem alloc error.
+ *      BIT_1 = mailbox error.
+ */
+int
+qla2x00_get_link_status(scsi_qla_host_t *ha, uint16_t loop_id,
+    link_stat_t *ret_buf, uint16_t *status)
+{
+        int rval;
+        mbx_cmd_t mc;
+        mbx_cmd_t *mcp = &mc;
+        link_stat_t *stat_buf;
+        dma_addr_t stat_buf_dma;
+
+        DEBUG11(printk("%s(%ld): entered.\n", __func__, ha->host_no);)
+
+        stat_buf = dma_pool_alloc(ha->s_dma_pool, GFP_ATOMIC, &stat_buf_dma);
+        if (stat_buf == NULL) {
+                DEBUG2_3_11(printk("%s(%ld): Failed to allocate memory.\n",
+                    __func__, ha->host_no));
+                return BIT_0;
+        }
+        memset(stat_buf, 0, sizeof(link_stat_t));
+
+        mcp->mb[0] = MBC_GET_LINK_STATUS;
+        mcp->mb[2] = MSW(stat_buf_dma);
+        mcp->mb[3] = LSW(stat_buf_dma);
+        mcp->mb[6] = MSW(MSD(stat_buf_dma));
+        mcp->mb[7] = LSW(MSD(stat_buf_dma));
+        mcp->out_mb = MBX_7|MBX_6|MBX_3|MBX_2|MBX_0;
+        mcp->in_mb = MBX_0;
+        if (IS_QLA24XX(ha) || IS_QLA25XX(ha)) {
+                mcp->mb[1] = loop_id;
+                mcp->mb[4] = 0;
+                mcp->mb[10] = 0;
+                mcp->out_mb |= MBX_10|MBX_4|MBX_1;
+                mcp->in_mb |= MBX_1;
+        } else if (HAS_EXTENDED_IDS(ha)) {
+                mcp->mb[1] = loop_id;
+                mcp->mb[10] = 0;
+                mcp->out_mb |= MBX_10|MBX_1;
+        } else {
+                mcp->mb[1] = loop_id << 8;
+                mcp->out_mb |= MBX_1;
+        }
+        mcp->tov = 30;
+        mcp->flags = IOCTL_CMD;
+        rval = qla2x00_mailbox_command(ha, mcp);
+
+        if (rval == QLA_SUCCESS) {
+                if (mcp->mb[0] != MBS_COMMAND_COMPLETE) {
+                        DEBUG2_3_11(printk("%s(%ld): cmd failed. mbx0=%x.\n",
+                            __func__, ha->host_no, mcp->mb[0]);)
+                        status[0] = mcp->mb[0];
+                        rval = BIT_1;
+                } else {
+                        /* copy over data -- firmware data is LE. */
+                        ret_buf->link_fail_cnt =
+                            le32_to_cpu(stat_buf->link_fail_cnt);
+                        ret_buf->loss_sync_cnt =
+                            le32_to_cpu(stat_buf->loss_sync_cnt);
+                        ret_buf->loss_sig_cnt =
+                            le32_to_cpu(stat_buf->loss_sig_cnt);
+                        ret_buf->prim_seq_err_cnt =
+                            le32_to_cpu(stat_buf->prim_seq_err_cnt);
+                        ret_buf->inval_xmit_word_cnt =
+                            le32_to_cpu(stat_buf->inval_xmit_word_cnt);
+                        ret_buf->inval_crc_cnt =
+                            le32_to_cpu(stat_buf->inval_crc_cnt);
+
+                        DEBUG11(printk("%s(%ld): stat dump: fail_cnt=%d "
+                            "loss_sync=%d loss_sig=%d seq_err=%d "
+                            "inval_xmt_word=%d inval_crc=%d.\n", __func__,
+                            ha->host_no, stat_buf->link_fail_cnt,
+                            stat_buf->loss_sync_cnt, stat_buf->loss_sig_cnt,
+                            stat_buf->prim_seq_err_cnt,
+                            stat_buf->inval_xmit_word_cnt,
+                            stat_buf->inval_crc_cnt);)
+                }
+        } else {
+                /* Failed. */
+                DEBUG2_3_11(printk("%s(%ld): failed=%x.\n", __func__,
+                    ha->host_no, rval);)
+                rval = BIT_1;
+        }
+
+        dma_pool_free(ha->s_dma_pool, stat_buf, stat_buf_dma);
 
-uint8_t
+        return rval;
+}
+
+int
 qla24xx_get_isp_stats(scsi_qla_host_t *ha, uint32_t *dwbuf, uint32_t dwords,
     uint16_t *status)
 {
@@ -2080,7 +2180,6 @@ qla24xx_get_isp_stats(scsi_qla_host_t *ha, uint32_t *dwbuf, uint32_t dwords,
 
         return rval;
 }
-#endif
 
 int
 qla24xx_abort_command(scsi_qla_host_t *ha, srb_t *sp)
diff --git a/drivers/scsi/qla2xxx/qla_rscn.c b/drivers/scsi/qla2xxx/qla_rscn.c
index 2c3342108dd8..b70bebe18c01 100644
--- a/drivers/scsi/qla2xxx/qla_rscn.c
+++ b/drivers/scsi/qla2xxx/qla_rscn.c
@@ -6,8 +6,6 @@
  */
 #include "qla_def.h"
 
-#include <scsi/scsi_transport_fc.h>
-
 /**
  * IO descriptor handle definitions.
  *