[SCSI] lpfc 8.2.4 : Add additional sysfs and module parameters
Made link speed and link topology modifiable via sysfs
Make scatter gather Segment Count into a module parameter.
Signed-off-by: James Smart <James.Smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c
index eb5a5ad..4bae4a2 100644
--- a/drivers/scsi/lpfc/lpfc_attr.c
+++ b/drivers/scsi/lpfc/lpfc_attr.c
@@ -45,6 +45,10 @@
#define LPFC_MIN_DEVLOSS_TMO 1
#define LPFC_MAX_DEVLOSS_TMO 255
+#define LPFC_MAX_LINK_SPEED 8
+#define LPFC_LINK_SPEED_BITMAP 0x00000117
+#define LPFC_LINK_SPEED_STRING "0, 1, 2, 4, 8"
+
static void
lpfc_jedec_to_ascii(int incr, char hdw[])
{
@@ -258,8 +262,7 @@
int mbxstatus = MBXERR_ERROR;
if ((vport->fc_flag & FC_OFFLINE_MODE) ||
- (phba->sli.sli_flag & LPFC_BLOCK_MGMT_IO) ||
- (vport->port_state != LPFC_VPORT_READY))
+ (phba->sli.sli_flag & LPFC_BLOCK_MGMT_IO))
return -EPERM;
pmboxq = mempool_alloc(phba->mbox_mem_pool,GFP_KERNEL);
@@ -1405,7 +1408,33 @@
# Set loop mode if you want to run as an NL_Port. Value range is [0,0x6].
# Default value is 0.
*/
-LPFC_ATTR_RW(topology, 0, 0, 6, "Select Fibre Channel topology");
+static int
+lpfc_topology_set(struct lpfc_hba *phba, int val)
+{
+ int err;
+ uint32_t prev_val;
+ if (val >= 0 && val <= 6) {
+ prev_val = phba->cfg_topology;
+ phba->cfg_topology = val;
+ err = lpfc_issue_lip(lpfc_shost_from_vport(phba->pport));
+ if (err)
+ phba->cfg_topology = prev_val;
+ return err;
+ }
+ lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
+ "%d:0467 lpfc_topology attribute cannot be set to %d, "
+ "allowed range is [0, 6]\n",
+ phba->brd_no, val);
+ return -EINVAL;
+}
+static int lpfc_topology = 0;
+module_param(lpfc_topology, int, 0);
+MODULE_PARM_DESC(lpfc_topology, "Select Fibre Channel topology");
+lpfc_param_show(topology)
+lpfc_param_init(topology, 0, 0, 6)
+lpfc_param_store(topology)
+static CLASS_DEVICE_ATTR(lpfc_topology, S_IRUGO | S_IWUSR,
+ lpfc_topology_show, lpfc_topology_store);
/*
# lpfc_link_speed: Link speed selection for initializing the Fibre Channel
@@ -1417,7 +1446,59 @@
# 8 = 8 Gigabaud
# Value range is [0,8]. Default value is 0.
*/
-LPFC_ATTR_R(link_speed, 0, 0, 8, "Select link speed");
+static int
+lpfc_link_speed_set(struct lpfc_hba *phba, int val)
+{
+ int err;
+ uint32_t prev_val;
+
+ if (((val == LINK_SPEED_1G) && !(phba->lmt & LMT_1Gb)) ||
+ ((val == LINK_SPEED_2G) && !(phba->lmt & LMT_2Gb)) ||
+ ((val == LINK_SPEED_4G) && !(phba->lmt & LMT_4Gb)) ||
+ ((val == LINK_SPEED_8G) && !(phba->lmt & LMT_8Gb)) ||
+ ((val == LINK_SPEED_10G) && !(phba->lmt & LMT_10Gb)))
+ return -EINVAL;
+
+ if ((val >= 0 && val <= LPFC_MAX_LINK_SPEED)
+ && (LPFC_LINK_SPEED_BITMAP & (1 << val))) {
+ prev_val = phba->cfg_link_speed;
+ phba->cfg_link_speed = val;
+ err = lpfc_issue_lip(lpfc_shost_from_vport(phba->pport));
+ if (err)
+ phba->cfg_link_speed = prev_val;
+ return err;
+ }
+
+ lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
+ "%d:0469 lpfc_link_speed attribute cannot be set to %d, "
+ "allowed range is [0, 8]\n",
+ phba->brd_no, val);
+ return -EINVAL;
+}
+
+static int lpfc_link_speed = 0;
+module_param(lpfc_link_speed, int, 0);
+MODULE_PARM_DESC(lpfc_link_speed, "Select link speed");
+lpfc_param_show(link_speed)
+static int
+lpfc_link_speed_init(struct lpfc_hba *phba, int val)
+{
+ if ((val >= 0 && val <= LPFC_MAX_LINK_SPEED)
+ && (LPFC_LINK_SPEED_BITMAP & (1 << val))) {
+ phba->cfg_link_speed = val;
+ return 0;
+ }
+ lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
+ "0454 lpfc_link_speed attribute cannot "
+ "be set to %d, allowed values are "
+ "["LPFC_LINK_SPEED_STRING"]\n", val);
+ phba->cfg_link_speed = 0;
+ return -EINVAL;
+}
+
+lpfc_param_store(link_speed)
+static CLASS_DEVICE_ATTR(lpfc_link_speed, S_IRUGO | S_IWUSR,
+ lpfc_link_speed_show, lpfc_link_speed_store);
/*
# lpfc_fcp_class: Determines FC class to use for the FCP protocol.
@@ -1531,6 +1612,15 @@
*/
LPFC_ATTR_R(enable_hba_heartbeat, 1, 0, 1, "Enable HBA Heartbeat.");
+/*
+ * lpfc_sg_seg_cnt: Initial Maximum DMA Segment Count
+ * This value can be set to values between 64 and 256. The default value is
+ * 64, but may be increased to allow for larger Max I/O sizes. The scsi layer
+ * will be allowed to request I/Os of sizes up to (MAX_SEG_COUNT * SEG_SIZE).
+ */
+LPFC_ATTR_R(sg_seg_cnt, LPFC_DEFAULT_SG_SEG_CNT, LPFC_DEFAULT_SG_SEG_CNT,
+ LPFC_MAX_SG_SEG_CNT, "Max Scatter Gather Segment Count");
+
struct class_device_attribute *lpfc_hba_attrs[] = {
&class_device_attr_info,
&class_device_attr_serialnum,
@@ -1583,6 +1673,7 @@
&class_device_attr_lpfc_soft_wwn_enable,
&class_device_attr_lpfc_enable_hba_reset,
&class_device_attr_lpfc_enable_hba_heartbeat,
+ &class_device_attr_lpfc_sg_seg_cnt,
NULL,
};
@@ -2490,18 +2581,18 @@
phba->cfg_poll = lpfc_poll;
phba->cfg_soft_wwnn = 0L;
phba->cfg_soft_wwpn = 0L;
- /*
- * The total number of segments is the configuration value plus 2
- * since the IOCB need a command and response bde.
- */
- phba->cfg_sg_seg_cnt = LPFC_SG_SEG_CNT + 2;
+ lpfc_sg_seg_cnt_init(phba, lpfc_sg_seg_cnt);
+ /* Also reinitialize the host templates with new values. */
+ lpfc_vport_template.sg_tablesize = phba->cfg_sg_seg_cnt;
+ lpfc_template.sg_tablesize = phba->cfg_sg_seg_cnt;
/*
* Since the sg_tablesize is module parameter, the sg_dma_buf_size
- * used to create the sg_dma_buf_pool must be dynamically calculated
+ * used to create the sg_dma_buf_pool must be dynamically calculated.
+ * 2 segments are added since the IOCB needs a command and response bde.
*/
phba->cfg_sg_dma_buf_size = sizeof(struct fcp_cmnd) +
sizeof(struct fcp_rsp) +
- (phba->cfg_sg_seg_cnt * sizeof(struct ulp_bde64));
+ ((phba->cfg_sg_seg_cnt + 2) * sizeof(struct ulp_bde64));
lpfc_hba_queue_depth_init(phba, lpfc_hba_queue_depth);
return;
}