[SCSI] lpfc 8.3.13: Add TX Queue Support for SLI4 ELS commands.

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

1 files changed, 58 insertions, 0 deletions

diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c
index b17fe5149e38..39b0760c438d 100644
--- a/drivers/scsi/lpfc/lpfc_attr.c
+++ b/drivers/scsi/lpfc/lpfc_attr.c
@@ -1949,6 +1949,59 @@ static DEVICE_ATTR(lpfc_enable_npiv, S_IRUGO, lpfc_enable_npiv_show, NULL);
 LPFC_ATTR_R(suppress_link_up, LPFC_INITIALIZE_LINK, LPFC_INITIALIZE_LINK,
 		LPFC_DELAY_INIT_LINK_INDEFINITELY,
 		"Suppress Link Up at initialization");
+/*
+# lpfc_cnt: Number of IOCBs allocated for ELS, CT, and ABTS
+#       1 - (1024)
+#       2 - (2048)
+#       3 - (3072)
+#       4 - (4096)
+#       5 - (5120)
+*/
+static ssize_t
+lpfc_iocb_hw_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct Scsi_Host  *shost = class_to_shost(dev);
+	struct lpfc_hba   *phba = ((struct lpfc_vport *) shost->hostdata)->phba;
+
+	return snprintf(buf, PAGE_SIZE, "%d\n", phba->iocb_max);
+}
+
+static DEVICE_ATTR(iocb_hw, S_IRUGO,
+			 lpfc_iocb_hw_show, NULL);
+static ssize_t
+lpfc_txq_hw_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct Scsi_Host  *shost = class_to_shost(dev);
+	struct lpfc_hba   *phba = ((struct lpfc_vport *) shost->hostdata)->phba;
+
+	return snprintf(buf, PAGE_SIZE, "%d\n",
+		phba->sli.ring[LPFC_ELS_RING].txq_max);
+}
+
+static DEVICE_ATTR(txq_hw, S_IRUGO,
+			 lpfc_txq_hw_show, NULL);
+static ssize_t
+lpfc_txcmplq_hw_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+	struct Scsi_Host  *shost = class_to_shost(dev);
+	struct lpfc_hba   *phba = ((struct lpfc_vport *) shost->hostdata)->phba;
+
+	return snprintf(buf, PAGE_SIZE, "%d\n",
+		phba->sli.ring[LPFC_ELS_RING].txcmplq_max);
+}
+
+static DEVICE_ATTR(txcmplq_hw, S_IRUGO,
+			 lpfc_txcmplq_hw_show, NULL);
+
+int lpfc_iocb_cnt = 2;
+module_param(lpfc_iocb_cnt, int, 1);
+MODULE_PARM_DESC(lpfc_iocb_cnt,
+	"Number of IOCBs alloc for ELS, CT, and ABTS: 1k to 5k IOCBs");
+lpfc_param_show(iocb_cnt);
+lpfc_param_init(iocb_cnt, 2, 1, 5);
+static DEVICE_ATTR(lpfc_iocb_cnt, S_IRUGO,
+			 lpfc_iocb_cnt_show, NULL);
 
 /*
 # lpfc_nodev_tmo: If set, it will hold all I/O errors on devices that disappear
@@ -3334,6 +3387,10 @@ struct device_attribute *lpfc_hba_attrs[] = {
 	&dev_attr_lpfc_aer_support,
 	&dev_attr_lpfc_aer_state_cleanup,
 	&dev_attr_lpfc_suppress_link_up,
+	&dev_attr_lpfc_iocb_cnt,
+	&dev_attr_iocb_hw,
+	&dev_attr_txq_hw,
+	&dev_attr_txcmplq_hw,
 	NULL,
 };
 
@@ -4521,6 +4578,7 @@ lpfc_get_cfgparam(struct lpfc_hba *phba)
 	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);
+	lpfc_iocb_cnt_init(phba, lpfc_iocb_cnt);
 	return;
 }