diff options
Diffstat (limited to 'drivers/scsi/lpfc/lpfc_attr.c')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_attr.c | 92 |
1 files changed, 90 insertions, 2 deletions
diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c index 89e8222bc7cc..5625a8c2a8fd 100644 --- a/drivers/scsi/lpfc/lpfc_attr.c +++ b/drivers/scsi/lpfc/lpfc_attr.c @@ -278,6 +278,71 @@ lpfc_board_online_store(struct class_device *cdev, const char *buf, return -EIO; } +static ssize_t +lpfc_poll_show(struct class_device *cdev, char *buf) +{ + struct Scsi_Host *host = class_to_shost(cdev); + struct lpfc_hba *phba = (struct lpfc_hba*)host->hostdata[0]; + + return snprintf(buf, PAGE_SIZE, "%#x\n", phba->cfg_poll); +} + +static ssize_t +lpfc_poll_store(struct class_device *cdev, const char *buf, + size_t count) +{ + struct Scsi_Host *host = class_to_shost(cdev); + struct lpfc_hba *phba = (struct lpfc_hba*)host->hostdata[0]; + uint32_t creg_val; + uint32_t old_val; + int val=0; + + if (!isdigit(buf[0])) + return -EINVAL; + + if (sscanf(buf, "%i", &val) != 1) + return -EINVAL; + + if ((val & 0x3) != val) + return -EINVAL; + + spin_lock_irq(phba->host->host_lock); + + old_val = phba->cfg_poll; + + if (val & ENABLE_FCP_RING_POLLING) { + if ((val & DISABLE_FCP_RING_INT) && + !(old_val & DISABLE_FCP_RING_INT)) { + creg_val = readl(phba->HCregaddr); + creg_val &= ~(HC_R0INT_ENA << LPFC_FCP_RING); + writel(creg_val, phba->HCregaddr); + readl(phba->HCregaddr); /* flush */ + + lpfc_poll_start_timer(phba); + } + } else if (val != 0x0) { + spin_unlock_irq(phba->host->host_lock); + return -EINVAL; + } + + if (!(val & DISABLE_FCP_RING_INT) && + (old_val & DISABLE_FCP_RING_INT)) + { + spin_unlock_irq(phba->host->host_lock); + del_timer(&phba->fcp_poll_timer); + spin_lock_irq(phba->host->host_lock); + creg_val = readl(phba->HCregaddr); + creg_val |= (HC_R0INT_ENA << LPFC_FCP_RING); + writel(creg_val, phba->HCregaddr); + readl(phba->HCregaddr); /* flush */ + } + + phba->cfg_poll = val; + + spin_unlock_irq(phba->host->host_lock); + + return strlen(buf); +} #define lpfc_param_show(attr) \ static ssize_t \ @@ -416,6 +481,15 @@ static CLASS_DEVICE_ATTR(management_version, S_IRUGO, management_version_show, static CLASS_DEVICE_ATTR(board_online, S_IRUGO | S_IWUSR, lpfc_board_online_show, lpfc_board_online_store); +static int lpfc_poll = 0; +module_param(lpfc_poll, int, 0); +MODULE_PARM_DESC(lpfc_poll, "FCP ring polling mode control:" + " 0 - none," + " 1 - poll with interrupts enabled" + " 3 - poll and disable FCP ring interrupts"); + +static CLASS_DEVICE_ATTR(lpfc_poll, S_IRUGO | S_IWUSR, + lpfc_poll_show, lpfc_poll_store); /* # lpfc_log_verbose: Only turn this flag on if you are willing to risk being @@ -523,10 +597,10 @@ LPFC_ATTR_R(ack0, 0, 0, 1, "Enable ACK0 support"); # is 0. Default value of cr_count is 1. The cr_count feature is disabled if # cr_delay is set to 0. */ -LPFC_ATTR(cr_delay, 0, 0, 63, "A count of milliseconds after which an" +LPFC_ATTR_RW(cr_delay, 0, 0, 63, "A count of milliseconds after which an" "interrupt response is generated"); -LPFC_ATTR(cr_count, 1, 1, 255, "A count of I/O completions after which an" +LPFC_ATTR_RW(cr_count, 1, 1, 255, "A count of I/O completions after which an" "interrupt response is generated"); /* @@ -553,6 +627,13 @@ LPFC_ATTR(discovery_threads, 32, 1, 64, "Maximum number of ELS commands" LPFC_ATTR_R(max_luns, 256, 1, 32768, "Maximum number of LUNs per target driver will support"); +/* +# lpfc_poll_tmo: .Milliseconds driver will wait between polling FCP ring. +# Value range is [1,255], default value is 10. +*/ +LPFC_ATTR_RW(poll_tmo, 10, 1, 255, + "Milliseconds driver will wait between polling FCP ring"); + struct class_device_attribute *lpfc_host_attrs[] = { &class_device_attr_info, &class_device_attr_serialnum, @@ -575,11 +656,15 @@ struct class_device_attribute *lpfc_host_attrs[] = { &class_device_attr_lpfc_topology, &class_device_attr_lpfc_scan_down, &class_device_attr_lpfc_link_speed, + &class_device_attr_lpfc_cr_delay, + &class_device_attr_lpfc_cr_count, &class_device_attr_lpfc_fdmi_on, &class_device_attr_lpfc_max_luns, &class_device_attr_nport_evt_cnt, &class_device_attr_management_version, &class_device_attr_board_online, + &class_device_attr_lpfc_poll, + &class_device_attr_lpfc_poll_tmo, NULL, }; @@ -1292,6 +1377,9 @@ lpfc_get_cfgparam(struct lpfc_hba *phba) lpfc_fdmi_on_init(phba, lpfc_fdmi_on); lpfc_discovery_threads_init(phba, lpfc_discovery_threads); lpfc_max_luns_init(phba, lpfc_max_luns); + lpfc_poll_tmo_init(phba, lpfc_poll_tmo); + + phba->cfg_poll = lpfc_poll; /* * The total number of segments is the configuration value plus 2 |