[SCSI] lpfc 8.3.9: Changes to sysfs interface for the lpfc driver.

- Convert all sysfs parameters to uint instead of int.
- Add lpfc_supress_link_up parameter.
- Change link_state to writable sysfs parameter.
- Add support to be able to "up" or "down" link from link_state parameter.

Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

4 files changed, 183 insertions, 33 deletions

diff --git a/drivers/scsi/lpfc/lpfc.h b/drivers/scsi/lpfc/lpfc.h
index a40a45b8aede..84b696463a58 100644
--- a/drivers/scsi/lpfc/lpfc.h
+++ b/drivers/scsi/lpfc/lpfc.h
@@ -504,6 +504,10 @@ struct lpfc_hba {
                 (struct lpfc_hba *);
         void (*lpfc_stop_port)
                 (struct lpfc_hba *);
+        int (*lpfc_hba_init_link)
+                (struct lpfc_hba *);
+        int (*lpfc_hba_down_link)
+                (struct lpfc_hba *);
 
 
         /* SLI4 specific HBA data structure */
@@ -618,6 +622,7 @@ struct lpfc_hba {
         uint32_t cfg_enable_bg;
         uint32_t cfg_log_verbose;
         uint32_t cfg_aer_support;
+        uint32_t cfg_suppress_link_up;
 
         lpfc_vpd_t vpd;         /* vital product data */
 
diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c
index a8908e7c368a..c992e8328f9e 100644
--- a/drivers/scsi/lpfc/lpfc_attr.c
+++ b/drivers/scsi/lpfc/lpfc_attr.c
@@ -482,6 +482,41 @@ lpfc_link_state_show(struct device *dev, struct device_attribute *attr,
 }
 
 /**
+ * lpfc_link_state_store - Transition the link_state on an HBA port
+ * @dev: class device that is converted into a Scsi_host.
+ * @attr: device attribute, not used.
+ * @buf: one or more lpfc_polling_flags values.
+ * @count: not used.
+ *
+ * Returns:
+ * -EINVAL if the buffer is not "up" or "down"
+ * return from link state change function if non-zero
+ * length of the buf on success
+ **/
+static ssize_t
+lpfc_link_state_store(struct device *dev, struct device_attribute *attr,
+                const char *buf, size_t count)
+{
+        struct Scsi_Host  *shost = class_to_shost(dev);
+        struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
+        struct lpfc_hba   *phba = vport->phba;
+
+        int status = -EINVAL;
+
+        if ((strncmp(buf, "up", sizeof("up") - 1) == 0) &&
+                        (phba->link_state == LPFC_LINK_DOWN))
+                status = phba->lpfc_hba_init_link(phba);
+        else if ((strncmp(buf, "down", sizeof("down") - 1) == 0) &&
+                        (phba->link_state >= LPFC_LINK_UP))
+                status = phba->lpfc_hba_down_link(phba);
+
+        if (status == 0)
+                return strlen(buf);
+        else
+                return status;
+}
+
+/**
  * lpfc_num_discovered_ports_show - Return sum of mapped and unmapped vports
  * @dev: class device that is converted into a Scsi_host.
  * @attr: device attribute, not used.
@@ -1219,7 +1254,7 @@ lpfc_##attr##_show(struct device *dev, struct device_attribute *attr, \
         struct Scsi_Host  *shost = class_to_shost(dev);\
         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;\
         struct lpfc_hba   *phba = vport->phba;\
-        int val = 0;\
+        uint val = 0;\
         val = phba->cfg_##attr;\
         return snprintf(buf, PAGE_SIZE, "%d\n",\
                         phba->cfg_##attr);\
@@ -1247,7 +1282,7 @@ lpfc_##attr##_show(struct device *dev, struct device_attribute *attr, \
         struct Scsi_Host  *shost = class_to_shost(dev);\
         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;\
         struct lpfc_hba   *phba = vport->phba;\
-        int val = 0;\
+        uint val = 0;\
         val = phba->cfg_##attr;\
         return snprintf(buf, PAGE_SIZE, "%#x\n",\
                         phba->cfg_##attr);\
@@ -1274,7 +1309,7 @@ lpfc_##attr##_show(struct device *dev, struct device_attribute *attr, \
  **/
 #define lpfc_param_init(attr, default, minval, maxval)  \
 static int \
-lpfc_##attr##_init(struct lpfc_hba *phba, int val) \
+lpfc_##attr##_init(struct lpfc_hba *phba, uint val) \
 { \
         if (val >= minval && val <= maxval) {\
                 phba->cfg_##attr = val;\
@@ -1309,7 +1344,7 @@ lpfc_##attr##_init(struct lpfc_hba *phba, int val) \
  **/
 #define lpfc_param_set(attr, default, minval, maxval)   \
 static int \
-lpfc_##attr##_set(struct lpfc_hba *phba, int val) \
+lpfc_##attr##_set(struct lpfc_hba *phba, uint val) \
 { \
         if (val >= minval && val <= maxval) {\
                 phba->cfg_##attr = val;\
@@ -1350,7 +1385,7 @@ lpfc_##attr##_store(struct device *dev, struct device_attribute *attr, \
         struct Scsi_Host  *shost = class_to_shost(dev);\
         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;\
         struct lpfc_hba   *phba = vport->phba;\
-        int val=0;\
+        uint val = 0;\
         if (!isdigit(buf[0]))\
                 return -EINVAL;\
         if (sscanf(buf, "%i", &val) != 1)\
@@ -1382,7 +1417,7 @@ lpfc_##attr##_show(struct device *dev, struct device_attribute *attr, \
 { \
         struct Scsi_Host  *shost = class_to_shost(dev);\
         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;\
-        int val = 0;\
+        uint val = 0;\
         val = vport->cfg_##attr;\
         return snprintf(buf, PAGE_SIZE, "%d\n", vport->cfg_##attr);\
 }
@@ -1409,7 +1444,7 @@ lpfc_##attr##_show(struct device *dev, struct device_attribute *attr, \
 { \
         struct Scsi_Host  *shost = class_to_shost(dev);\
         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;\
-        int val = 0;\
+        uint val = 0;\
         val = vport->cfg_##attr;\
         return snprintf(buf, PAGE_SIZE, "%#x\n", vport->cfg_##attr);\
 }
@@ -1434,7 +1469,7 @@ lpfc_##attr##_show(struct device *dev, struct device_attribute *attr, \
  **/
 #define lpfc_vport_param_init(attr, default, minval, maxval)    \
 static int \
-lpfc_##attr##_init(struct lpfc_vport *vport, int val) \
+lpfc_##attr##_init(struct lpfc_vport *vport, uint val) \
 { \
         if (val >= minval && val <= maxval) {\
                 vport->cfg_##attr = val;\
@@ -1466,7 +1501,7 @@ lpfc_##attr##_init(struct lpfc_vport *vport, int val) \
  **/
 #define lpfc_vport_param_set(attr, default, minval, maxval)     \
 static int \
-lpfc_##attr##_set(struct lpfc_vport *vport, int val) \
+lpfc_##attr##_set(struct lpfc_vport *vport, uint val) \
 { \
         if (val >= minval && val <= maxval) {\
                 vport->cfg_##attr = val;\
@@ -1502,7 +1537,7 @@ lpfc_##attr##_store(struct device *dev, struct device_attribute *attr, \
 { \
         struct Scsi_Host  *shost = class_to_shost(dev);\
         struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;\
-        int val=0;\
+        uint val = 0;\
         if (!isdigit(buf[0]))\
                 return -EINVAL;\
         if (sscanf(buf, "%i", &val) != 1)\
@@ -1515,22 +1550,22 @@ lpfc_##attr##_store(struct device *dev, struct device_attribute *attr, \
 
 
 #define LPFC_ATTR(name, defval, minval, maxval, desc) \
-static int lpfc_##name = defval;\
-module_param(lpfc_##name, int, 0);\
+static uint lpfc_##name = defval;\
+module_param(lpfc_##name, uint, 0);\
 MODULE_PARM_DESC(lpfc_##name, desc);\
 lpfc_param_init(name, defval, minval, maxval)
 
 #define LPFC_ATTR_R(name, defval, minval, maxval, desc) \
-static int lpfc_##name = defval;\
-module_param(lpfc_##name, int, 0);\
+static uint lpfc_##name = defval;\
+module_param(lpfc_##name, uint, 0);\
 MODULE_PARM_DESC(lpfc_##name, desc);\
 lpfc_param_show(name)\
 lpfc_param_init(name, defval, minval, maxval)\
 static DEVICE_ATTR(lpfc_##name, S_IRUGO , lpfc_##name##_show, NULL)
 
 #define LPFC_ATTR_RW(name, defval, minval, maxval, desc) \
-static int lpfc_##name = defval;\
-module_param(lpfc_##name, int, 0);\
+static uint lpfc_##name = defval;\
+module_param(lpfc_##name, uint, 0);\
 MODULE_PARM_DESC(lpfc_##name, desc);\
 lpfc_param_show(name)\
 lpfc_param_init(name, defval, minval, maxval)\
@@ -1540,16 +1575,16 @@ static DEVICE_ATTR(lpfc_##name, S_IRUGO | S_IWUSR,\
                    lpfc_##name##_show, lpfc_##name##_store)
 
 #define LPFC_ATTR_HEX_R(name, defval, minval, maxval, desc) \
-static int lpfc_##name = defval;\
-module_param(lpfc_##name, int, 0);\
+static uint lpfc_##name = defval;\
+module_param(lpfc_##name, uint, 0);\
 MODULE_PARM_DESC(lpfc_##name, desc);\
 lpfc_param_hex_show(name)\
 lpfc_param_init(name, defval, minval, maxval)\
 static DEVICE_ATTR(lpfc_##name, S_IRUGO , lpfc_##name##_show, NULL)
 
 #define LPFC_ATTR_HEX_RW(name, defval, minval, maxval, desc) \
-static int lpfc_##name = defval;\
-module_param(lpfc_##name, int, 0);\
+static uint lpfc_##name = defval;\
+module_param(lpfc_##name, uint, 0);\
 MODULE_PARM_DESC(lpfc_##name, desc);\
 lpfc_param_hex_show(name)\
 lpfc_param_init(name, defval, minval, maxval)\
@@ -1559,22 +1594,22 @@ static DEVICE_ATTR(lpfc_##name, S_IRUGO | S_IWUSR,\
                    lpfc_##name##_show, lpfc_##name##_store)
 
 #define LPFC_VPORT_ATTR(name, defval, minval, maxval, desc) \
-static int lpfc_##name = defval;\
-module_param(lpfc_##name, int, 0);\
+static uint lpfc_##name = defval;\
+module_param(lpfc_##name, uint, 0);\
 MODULE_PARM_DESC(lpfc_##name, desc);\
 lpfc_vport_param_init(name, defval, minval, maxval)
 
 #define LPFC_VPORT_ATTR_R(name, defval, minval, maxval, desc) \
-static int lpfc_##name = defval;\
-module_param(lpfc_##name, int, 0);\
+static uint lpfc_##name = defval;\
+module_param(lpfc_##name, uint, 0);\
 MODULE_PARM_DESC(lpfc_##name, desc);\
 lpfc_vport_param_show(name)\
 lpfc_vport_param_init(name, defval, minval, maxval)\
 static DEVICE_ATTR(lpfc_##name, S_IRUGO , lpfc_##name##_show, NULL)
 
 #define LPFC_VPORT_ATTR_RW(name, defval, minval, maxval, desc) \
-static int lpfc_##name = defval;\
-module_param(lpfc_##name, int, 0);\
+static uint lpfc_##name = defval;\
+module_param(lpfc_##name, uint, 0);\
 MODULE_PARM_DESC(lpfc_##name, desc);\
 lpfc_vport_param_show(name)\
 lpfc_vport_param_init(name, defval, minval, maxval)\
@@ -1584,16 +1619,16 @@ static DEVICE_ATTR(lpfc_##name, S_IRUGO | S_IWUSR,\
                    lpfc_##name##_show, lpfc_##name##_store)
 
 #define LPFC_VPORT_ATTR_HEX_R(name, defval, minval, maxval, desc) \
-static int lpfc_##name = defval;\
-module_param(lpfc_##name, int, 0);\
+static uint lpfc_##name = defval;\
+module_param(lpfc_##name, uint, 0);\
 MODULE_PARM_DESC(lpfc_##name, desc);\
 lpfc_vport_param_hex_show(name)\
 lpfc_vport_param_init(name, defval, minval, maxval)\
 static DEVICE_ATTR(lpfc_##name, S_IRUGO , lpfc_##name##_show, NULL)
 
 #define LPFC_VPORT_ATTR_HEX_RW(name, defval, minval, maxval, desc) \
-static int lpfc_##name = defval;\
-module_param(lpfc_##name, int, 0);\
+static uint lpfc_##name = defval;\
+module_param(lpfc_##name, uint, 0);\
 MODULE_PARM_DESC(lpfc_##name, desc);\
 lpfc_vport_param_hex_show(name)\
 lpfc_vport_param_init(name, defval, minval, maxval)\
@@ -1614,7 +1649,8 @@ static DEVICE_ATTR(programtype, S_IRUGO, lpfc_programtype_show, NULL);
 static DEVICE_ATTR(portnum, S_IRUGO, lpfc_vportnum_show, NULL);
 static DEVICE_ATTR(fwrev, S_IRUGO, lpfc_fwrev_show, NULL);
 static DEVICE_ATTR(hdw, S_IRUGO, lpfc_hdw_show, NULL);
-static DEVICE_ATTR(link_state, S_IRUGO, lpfc_link_state_show, NULL);
+static DEVICE_ATTR(link_state, S_IRUGO | S_IWUSR, lpfc_link_state_show,
+                lpfc_link_state_store);
 static DEVICE_ATTR(option_rom_version, S_IRUGO,
                    lpfc_option_rom_version_show, NULL);
 static DEVICE_ATTR(num_discovered_ports, S_IRUGO,
@@ -1897,6 +1933,15 @@ static DEVICE_ATTR(lpfc_enable_npiv, S_IRUGO,
                          lpfc_enable_npiv_show, NULL);
 
 /*
+# lpfc_suppress_link_up:  Bring link up at initialization
+#            0x0  = bring link up (issue MBX_INIT_LINK)
+#            0x1  = do NOT bring link up at initialization(MBX_INIT_LINK)
+#            0x2  = never bring up link
+# Default value is 0.
+*/
+LPFC_ATTR_R(suppress_link_up, 0, 0, 2, "Suppress Link Up at initialization");
+
+/*
 # lpfc_nodev_tmo: If set, it will hold all I/O errors on devices that disappear
 # until the timer expires. Value range is [0,255]. Default value is 30.
 */
@@ -3278,6 +3323,7 @@ struct device_attribute *lpfc_hba_attrs[] = {
         &dev_attr_lpfc_prot_sg_seg_cnt,
         &dev_attr_lpfc_aer_support,
         &dev_attr_lpfc_aer_state_cleanup,
+        &dev_attr_lpfc_suppress_link_up,
         NULL,
 };
 
@@ -4456,7 +4502,7 @@ lpfc_get_cfgparam(struct lpfc_hba *phba)
         lpfc_hba_queue_depth_init(phba, lpfc_hba_queue_depth);
         lpfc_hba_log_verbose_init(phba, lpfc_log_verbose);
         lpfc_aer_support_init(phba, lpfc_aer_support);
-
+        lpfc_suppress_link_up_init(phba, lpfc_suppress_link_up);
         return;
 }
 
diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index b0b7bb39f054..89d886c72e0a 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -544,7 +544,7 @@ lpfc_config_port_post(struct lpfc_hba *phba)
                         mempool_free(pmb, phba->mbox_mem_pool);
                         return -EIO;
                 }
-        } else {
+        } else if (phba->cfg_suppress_link_up == 0) {
                 lpfc_init_link(phba, pmb, phba->cfg_topology,
                         phba->cfg_link_speed);
                 pmb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
@@ -603,6 +603,102 @@ lpfc_config_port_post(struct lpfc_hba *phba)
 }
 
 /**
+ * lpfc_hba_init_link - Initialize the FC link
+ * @phba: pointer to lpfc hba data structure.
+ *
+ * This routine will issue the INIT_LINK mailbox command call.
+ * It is available to other drivers through the lpfc_hba data
+ * structure for use as a delayed link up mechanism with the
+ * module parameter lpfc_suppress_link_up.
+ *
+ * Return code
+ *              0 - success
+ *              Any other value - error
+ **/
+int
+lpfc_hba_init_link(struct lpfc_hba *phba)
+{
+        struct lpfc_vport *vport = phba->pport;
+        LPFC_MBOXQ_t *pmb;
+        MAILBOX_t *mb;
+        int rc;
+
+        pmb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
+        if (!pmb) {
+                phba->link_state = LPFC_HBA_ERROR;
+                return -ENOMEM;
+        }
+        mb = &pmb->u.mb;
+        pmb->vport = vport;
+
+        lpfc_init_link(phba, pmb, phba->cfg_topology,
+                phba->cfg_link_speed);
+        pmb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
+        lpfc_set_loopback_flag(phba);
+        rc = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT);
+        if (rc != MBX_SUCCESS) {
+                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
+                        "0498 Adapter failed to init, mbxCmd x%x "
+                        "INIT_LINK, mbxStatus x%x\n",
+                        mb->mbxCommand, mb->mbxStatus);
+                /* Clear all interrupt enable conditions */
+                writel(0, phba->HCregaddr);
+                readl(phba->HCregaddr); /* flush */
+                /* Clear all pending interrupts */
+                writel(0xffffffff, phba->HAregaddr);
+                readl(phba->HAregaddr); /* flush */
+                phba->link_state = LPFC_HBA_ERROR;
+                if (rc != MBX_BUSY)
+                        mempool_free(pmb, phba->mbox_mem_pool);
+                return -EIO;
+        }
+        phba->cfg_suppress_link_up = 0;
+
+        return 0;
+}
+
+/**
+ * lpfc_hba_down_link - this routine downs the FC link
+ *
+ * This routine will issue the DOWN_LINK mailbox command call.
+ * It is available to other drivers through the lpfc_hba data
+ * structure for use to stop the link.
+ *
+ * Return code
+ *              0 - success
+ *              Any other value - error
+ **/
+int
+lpfc_hba_down_link(struct lpfc_hba *phba)
+{
+        LPFC_MBOXQ_t *pmb;
+        int rc;
+
+        pmb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
+        if (!pmb) {
+                phba->link_state = LPFC_HBA_ERROR;
+                return -ENOMEM;
+        }
+
+        lpfc_printf_log(phba,
+                KERN_ERR, LOG_INIT,
+                "0491 Adapter Link is disabled.\n");
+        lpfc_down_link(phba, pmb);
+        pmb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
+        rc = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT);
+        if ((rc != MBX_SUCCESS) && (rc != MBX_BUSY)) {
+                lpfc_printf_log(phba,
+                KERN_ERR, LOG_INIT,
+                "2522 Adapter failed to issue DOWN_LINK"
+                " mbox command rc 0x%x\n", rc);
+
+                mempool_free(pmb, phba->mbox_mem_pool);
+                return -EIO;
+        }
+        return 0;
+}
+
+/**
  * lpfc_hba_down_prep - Perform lpfc uninitialization prior to HBA reset
  * @phba: pointer to lpfc HBA data structure.
  *
@@ -3952,6 +4048,8 @@ lpfc_sli4_driver_resource_unset(struct lpfc_hba *phba)
 int
 lpfc_init_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
 {
+        phba->lpfc_hba_init_link = lpfc_hba_init_link;
+        phba->lpfc_hba_down_link = lpfc_hba_down_link;
         switch (dev_grp) {
         case LPFC_PCI_DEV_LP:
                 phba->lpfc_hba_down_post = lpfc_hba_down_post_s3;
diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index 8e98c6335e00..7f21b47db791 100644
--- a/drivers/scsi/lpfc/lpfc_scsi.c
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -2640,6 +2640,7 @@ lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
         }
         phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf;
         phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth;
+        phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
         return 0;
 }