This patch adds function to print the pending frame details before returning
failure from the reset routine. It also exposes a new variable megasas_dbg_lvl
that allows the user to set the debug level for logging.
Signed-off-by: Sumant Patro <[email protected]>
diff -uprN linux-2.6-orig/drivers/scsi/megaraid/megaraid_sas.c linux-2.6-new/drivers/scsi/megaraid/megaraid_sas.c
--- linux-2.6-orig/drivers/scsi/megaraid/megaraid_sas.c 2006-09-20 15:07:28.000000000 -0700
+++ linux-2.6-new/drivers/scsi/megaraid/megaraid_sas.c 2006-09-20 15:14:57.000000000 -0700
@@ -73,6 +73,8 @@ static struct megasas_mgmt_info megasas_
static struct fasync_struct *megasas_async_queue;
static DEFINE_MUTEX(megasas_async_queue_mutex);
+static u32 megasas_dbg_lvl;
+
/**
* megasas_get_cmd - Get a command from the free pool
* @instance: Adapter soft state
@@ -760,6 +762,69 @@ static inline int megasas_is_ldio(struct
}
}
+ /**
+ * megasas_dump_pending_frames - Dumps the frame address of all pending cmds
+ * in FW
+ * @instance: Adapter soft state
+ */
+static inline void
+megasas_dump_pending_frames(struct megasas_instance *instance)
+{
+ struct megasas_cmd *cmd;
+ int i,n;
+ union megasas_sgl *mfi_sgl;
+ struct megasas_io_frame *ldio;
+ struct megasas_pthru_frame *pthru;
+ u32 sgcount;
+ u32 max_cmd = instance->max_fw_cmds;
+
+ printk(KERN_ERR "\nmegasas[%d]: Dumping Frame Phys Address of all pending cmds in FW\n",instance->host->host_no);
+ printk(KERN_ERR "megasas[%d]: Total OS Pending cmds : %d\n",instance->host->host_no,atomic_read(&instance->fw_outstanding));
+ if (IS_DMA64)
+ printk(KERN_ERR "\nmegasas[%d]: 64 bit SGLs were sent to FW\n",instance->host->host_no);
+ else
+ printk(KERN_ERR "\nmegasas[%d]: 32 bit SGLs were sent to FW\n",instance->host->host_no);
+
+ printk(KERN_ERR "megasas[%d]: Pending OS cmds in FW : \n",instance->host->host_no);
+ for (i = 0; i < max_cmd; i++) {
+ cmd = instance->cmd_list[i];
+ if(!cmd->scmd)
+ continue;
+ printk(KERN_ERR "megasas[%d]: Frame addr :0x%08lx : ",instance->host->host_no,(unsigned long)cmd->frame_phys_addr);
+ if (megasas_is_ldio(cmd->scmd)){
+ ldio = (struct megasas_io_frame *)cmd->frame;
+ mfi_sgl = &ldio->sgl;
+ sgcount = ldio->sge_count;
+ printk(KERN_ERR "megasas[%d]: frame count : 0x%x, Cmd : 0x%x, Tgt id : 0x%x, lba lo : 0x%x, lba_hi : 0x%x, sense_buf addr : 0x%x,sge count : 0x%x\n",instance->host->host_no, cmd->frame_count,ldio->cmd,ldio->target_id, ldio->start_lba_lo,ldio->start_lba_hi,ldio->sense_buf_phys_addr_lo,sgcount);
+ }
+ else {
+ pthru = (struct megasas_pthru_frame *) cmd->frame;
+ mfi_sgl = &pthru->sgl;
+ sgcount = pthru->sge_count;
+ printk(KERN_ERR "megasas[%d]: frame count : 0x%x, Cmd : 0x%x, Tgt id : 0x%x, lun : 0x%x, cdb_len : 0x%x, data xfer len : 0x%x, sense_buf addr : 0x%x,sge count : 0x%x\n",instance->host->host_no,cmd->frame_count,pthru->cmd,pthru->target_id,pthru->lun,pthru->cdb_len , pthru->data_xfer_len,pthru->sense_buf_phys_addr_lo,sgcount);
+ }
+ if(megasas_dbg_lvl & MEGASAS_DBG_LVL){
+ for (n = 0; n < sgcount; n++){
+ if (IS_DMA64)
+ printk(KERN_ERR "megasas: sgl len : 0x%x, sgl addr : 0x%08lx ",mfi_sgl->sge64[n].length , (unsigned long)mfi_sgl->sge64[n].phys_addr) ;
+ else
+ printk(KERN_ERR "megasas: sgl len : 0x%x, sgl addr : 0x%x ",mfi_sgl->sge32[n].length , mfi_sgl->sge32[n].phys_addr) ;
+ }
+ }
+ printk(KERN_ERR "\n");
+ } /*for max_cmd*/
+ printk(KERN_ERR "\nmegasas[%d]: Pending Internal cmds in FW : \n",instance->host->host_no);
+ for (i = 0; i < max_cmd; i++) {
+
+ cmd = instance->cmd_list[i];
+
+ if(cmd->sync_cmd == 1){
+ printk(KERN_ERR "0x%08lx : ", (unsigned long)cmd->frame_phys_addr);
+ }
+ }
+ printk(KERN_ERR "megasas[%d]: Dumping Done.\n\n",instance->host->host_no);
+}
+
/**
* megasas_queue_command - Queue entry point
* @scmd: SCSI command to be queued
@@ -871,6 +936,7 @@ static int megasas_wait_for_outstanding(
*/
writel(MFI_STOP_ADP,
&instance->reg_set->inbound_doorbell);
+ megasas_dump_pending_frames(instance);
instance->hw_crit_error = 1;
return FAILED;
}
@@ -2238,6 +2304,8 @@ megasas_probe_one(struct pci_dev *pdev,
instance->unique_id = pdev->bus->number << 8 | pdev->devfn;
instance->init_id = MEGASAS_DEFAULT_INIT_ID;
+ megasas_dbg_lvl = 0;
+
/*
* Initialize MFI Firmware
*/
@@ -2894,6 +2962,26 @@ megasas_sysfs_show_release_date(struct d
static DRIVER_ATTR(release_date, S_IRUGO, megasas_sysfs_show_release_date,
NULL);
+static ssize_t
+megasas_sysfs_show_dbg_lvl(struct device_driver *dd, char *buf)
+{
+ return sprintf(buf,"%u",megasas_dbg_lvl);
+}
+
+static ssize_t
+megasas_sysfs_set_dbg_lvl(struct device_driver *dd, const char *buf, size_t count)
+{
+ int retval = count;
+ if(sscanf(buf,"%u",&megasas_dbg_lvl)<1){
+ printk(KERN_ERR "megasas: could not set dbg_lvl\n");
+ retval = -EINVAL;
+ }
+ return retval;
+}
+
+static DRIVER_ATTR(dbg_lvl, S_IRUGO|S_IWUGO, megasas_sysfs_show_dbg_lvl,
+ megasas_sysfs_set_dbg_lvl);
+
/**
* megasas_init - Driver load entry point
*/
@@ -2934,6 +3022,8 @@ static int __init megasas_init(void)
driver_create_file(&megasas_pci_driver.driver, &driver_attr_version);
driver_create_file(&megasas_pci_driver.driver,
&driver_attr_release_date);
+ driver_create_file(&megasas_pci_driver.driver,
+ &driver_attr_dbg_lvl);
if(register_reboot_notifier(&megasas_notifier)) {
printk("megasas: reboot notify routine registration failed!!\n");
@@ -2950,6 +3040,8 @@ static void __exit megasas_exit(void)
driver_remove_file(&megasas_pci_driver.driver, &driver_attr_version);
driver_remove_file(&megasas_pci_driver.driver,
&driver_attr_release_date);
+ driver_remove_file(&megasas_pci_driver.driver,
+ &driver_attr_dbg_lvl);
pci_unregister_driver(&megasas_pci_driver);
unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl");
diff -uprN linux-2.6-orig/drivers/scsi/megaraid/megaraid_sas.h linux-2.6-new/drivers/scsi/megaraid/megaraid_sas.h
--- linux-2.6-orig/drivers/scsi/megaraid/megaraid_sas.h 2006-09-20 15:07:28.000000000 -0700
+++ linux-2.6-new/drivers/scsi/megaraid/megaraid_sas.h 2006-09-20 15:11:40.000000000 -0700
@@ -537,6 +537,8 @@ struct megasas_ctrl_info {
#define MEGASAS_MAX_LUN 8
#define MEGASAS_MAX_LD 64
+#define MEGASAS_DBG_LVL 1
+
/*
* When SCSI mid-layer calls driver's reset routine, driver waits for
* MEGASAS_RESET_WAIT_TIME seconds for all outstanding IO to complete. Note