*
* Linux MegaRAID driver for SAS based RAID controllers
*
- * Copyright (c) 2003-2005 LSI Logic Corporation.
+ * Copyright (c) 2003-2005 LSI Corporation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* 2 of the License, or (at your option) any later version.
*
* FILE : megaraid_sas.c
- * Version : v00.00.03.10-rc5
+ * Version : v00.00.03.20-rc1
*
* Authors:
* (email-id : megaraidlinux@lsi.com)
#include <linux/moduleparam.h>
#include <linux/module.h>
#include <linux/spinlock.h>
-#include <linux/mutex.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
+#include <linux/smp_lock.h>
#include <linux/uio.h>
#include <asm/uaccess.h>
#include <linux/fs.h>
#include <scsi/scsi_host.h>
#include "megaraid_sas.h"
+/*
+ * poll_mode_io:1- schedule complete completion from q cmd
+ */
+static unsigned int poll_mode_io;
+module_param_named(poll_mode_io, poll_mode_io, int, 0);
+MODULE_PARM_DESC(poll_mode_io,
+ "Complete cmds from IO path, (default=0)");
+
MODULE_LICENSE("GPL");
MODULE_VERSION(MEGASAS_VERSION);
MODULE_AUTHOR("megaraidlinux@lsi.com");
-MODULE_DESCRIPTION("LSI Logic MegaRAID SAS Driver");
+MODULE_DESCRIPTION("LSI MegaRAID SAS Driver");
/*
* PCI ID table for all supported controllers
/* xscale IOP */
{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078R)},
/* ppc IOP */
+ {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_SAS1078DE)},
+ /* ppc IOP */
{PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_VERDE_ZCR)},
/* xscale IOP, vega */
{PCI_DEVICE(PCI_VENDOR_ID_DELL, PCI_DEVICE_ID_DELL_PERC5)},
/**
* megasas_get_frame_count - Computes the number of frames
+ * @frame_type : type of frame- io or pthru frame
* @sge_count : number of sg elements
*
* Returns the number of frames required for numnber of sge's (sge_count)
*/
-static u32 megasas_get_frame_count(u8 sge_count)
+static u32 megasas_get_frame_count(u8 sge_count, u8 frame_type)
{
int num_cnt;
int sge_bytes;
sizeof(struct megasas_sge32);
/*
- * Main frame can contain 2 SGEs for 64-bit SGLs and
- * 3 SGEs for 32-bit SGLs
- */
- if (IS_DMA64)
- num_cnt = sge_count - 2;
- else
- num_cnt = sge_count - 3;
+ * Main frame can contain 2 SGEs for 64-bit SGLs and
+ * 3 SGEs for 32-bit SGLs for ldio &
+ * 1 SGEs for 64-bit SGLs and
+ * 2 SGEs for 32-bit SGLs for pthru frame
+ */
+ if (unlikely(frame_type == PTHRU_FRAME)) {
+ if (IS_DMA64)
+ num_cnt = sge_count - 1;
+ else
+ num_cnt = sge_count - 2;
+ } else {
+ if (IS_DMA64)
+ num_cnt = sge_count - 2;
+ else
+ num_cnt = sge_count - 3;
+ }
if(num_cnt>0){
sge_bytes = sge_sz * num_cnt;
* Compute the total number of frames this command consumes. FW uses
* this number to pull sufficient number of frames from host memory.
*/
- cmd->frame_count = megasas_get_frame_count(pthru->sge_count);
+ cmd->frame_count = megasas_get_frame_count(pthru->sge_count,
+ PTHRU_FRAME);
return cmd->frame_count;
}
* Compute the total number of frames this command consumes. FW uses
* this number to pull sufficient number of frames from host memory.
*/
- cmd->frame_count = megasas_get_frame_count(ldio->sge_count);
+ cmd->frame_count = megasas_get_frame_count(ldio->sge_count, IO_FRAME);
return cmd->frame_count;
}
atomic_inc(&instance->fw_outstanding);
instance->instancet->fire_cmd(cmd->frame_phys_addr ,cmd->frame_count-1,instance->reg_set);
+ /*
+ * Check if we have pend cmds to be completed
+ */
+ if (poll_mode_io && atomic_read(&instance->fw_outstanding))
+ tasklet_schedule(&instance->isr_tasklet);
+
return 0;
static struct scsi_host_template megasas_template = {
.module = THIS_MODULE,
- .name = "LSI Logic SAS based MegaRAID driver",
+ .name = "LSI SAS based MegaRAID driver",
.proc_name = "megaraid_sas",
.slave_configure = megasas_slave_configure,
.queuecommand = megasas_queue_command,
.eh_timed_out = megasas_reset_timer,
.bios_param = megasas_bios_param,
.use_clustering = ENABLE_CLUSTERING,
- .use_sg_chaining = ENABLE_SG_CHAINING,
};
/**
instance->instancet->disable_intr(instance->reg_set);
writel(MFI_RESET_FLAGS, &instance->reg_set->inbound_doorbell);
- max_wait = 10;
+ max_wait = 60;
cur_state = MFI_STATE_OPERATIONAL;
break;
return -EINVAL;
}
+/**
+ * megasas_start_timer - Initializes a timer object
+ * @instance: Adapter soft state
+ * @timer: timer object to be initialized
+ * @fn: timer function
+ * @interval: time interval between timer function call
+ */
+static inline void
+megasas_start_timer(struct megasas_instance *instance,
+ struct timer_list *timer,
+ void *fn, unsigned long interval)
+{
+ init_timer(timer);
+ timer->expires = jiffies + interval;
+ timer->data = (unsigned long)instance;
+ timer->function = fn;
+ add_timer(timer);
+}
+
+/**
+ * megasas_io_completion_timer - Timer fn
+ * @instance_addr: Address of adapter soft state
+ *
+ * Schedules tasklet for cmd completion
+ * if poll_mode_io is set
+ */
+static void
+megasas_io_completion_timer(unsigned long instance_addr)
+{
+ struct megasas_instance *instance =
+ (struct megasas_instance *)instance_addr;
+
+ if (atomic_read(&instance->fw_outstanding))
+ tasklet_schedule(&instance->isr_tasklet);
+
+ /* Restart timer */
+ if (poll_mode_io)
+ mod_timer(&instance->io_completion_timer,
+ jiffies + MEGASAS_COMPLETION_TIMER_INTERVAL);
+}
+
/**
* megasas_init_mfi - Initializes the FW
* @instance: Adapter soft state
*/
instance->base_addr = pci_resource_start(instance->pdev, 0);
- if (pci_request_regions(instance->pdev, "megasas: LSI Logic")) {
+ if (pci_request_regions(instance->pdev, "megasas: LSI")) {
printk(KERN_DEBUG "megasas: IO memory region busy!\n");
return -EBUSY;
}
switch(instance->pdev->device)
{
- case PCI_DEVICE_ID_LSI_SAS1078R:
+ case PCI_DEVICE_ID_LSI_SAS1078R:
+ case PCI_DEVICE_ID_LSI_SAS1078DE:
instance->instancet = &megasas_instance_template_ppc;
break;
case PCI_DEVICE_ID_LSI_SAS1064R:
* Setup tasklet for cmd completion
*/
- tasklet_init(&instance->isr_tasklet, megasas_complete_cmd_dpc,
- (unsigned long)instance);
+ tasklet_init(&instance->isr_tasklet, megasas_complete_cmd_dpc,
+ (unsigned long)instance);
+
+ /* Initialize the cmd completion timer */
+ if (poll_mode_io)
+ megasas_start_timer(instance, &instance->io_completion_timer,
+ megasas_io_completion_timer,
+ MEGASAS_COMPLETION_TIMER_INTERVAL);
return 0;
fail_fw_init:
return;
}
+#ifdef CONFIG_PM
/**
- * megasas_suspend - driver suspend entry point
- * @pdev: PCI device structure
+ * megasas_suspend - driver suspend entry point
+ * @pdev: PCI device structure
* @state: PCI power state to suspend routine
*/
-static int __devinit
+static int
megasas_suspend(struct pci_dev *pdev, pm_message_t state)
{
struct Scsi_Host *host;
instance = pci_get_drvdata(pdev);
host = instance->host;
+ if (poll_mode_io)
+ del_timer_sync(&instance->io_completion_timer);
+
megasas_flush_cache(instance);
megasas_shutdown_controller(instance, MR_DCMD_HIBERNATE_SHUTDOWN);
tasklet_kill(&instance->isr_tasklet);
* megasas_resume- driver resume entry point
* @pdev: PCI device structure
*/
-static int __devinit
+static int
megasas_resume(struct pci_dev *pdev)
{
int rval;
if (megasas_start_aen(instance))
printk(KERN_ERR "megasas: Start AEN failed\n");
+ /* Initialize the cmd completion timer */
+ if (poll_mode_io)
+ megasas_start_timer(instance, &instance->io_completion_timer,
+ megasas_io_completion_timer,
+ MEGASAS_COMPLETION_TIMER_INTERVAL);
return 0;
fail_irq:
return -ENODEV;
}
+#else
+#define megasas_suspend NULL
+#define megasas_resume NULL
+#endif
/**
* megasas_detach_one - PCI hot"un"plug entry point
* @pdev: PCI device structure
*/
-static void megasas_detach_one(struct pci_dev *pdev)
+static void __devexit megasas_detach_one(struct pci_dev *pdev)
{
int i;
struct Scsi_Host *host;
instance = pci_get_drvdata(pdev);
host = instance->host;
+ if (poll_mode_io)
+ del_timer_sync(&instance->io_completion_timer);
+
scsi_remove_host(instance->host);
megasas_flush_cache(instance);
megasas_shutdown_controller(instance, MR_DCMD_CTRL_SHUTDOWN);
*/
static int megasas_mgmt_open(struct inode *inode, struct file *filep)
{
+ cycle_kernel_lock();
/*
* Allow only those users with admin rights
*/
void *sense = NULL;
dma_addr_t sense_handle;
u32 *sense_ptr;
- unsigned long *sense_buff;
memset(kbuff_arr, 0, sizeof(kbuff_arr));
*/
if (ioc->sense_len) {
/*
- * sense_buff points to the location that has the user
+ * sense_ptr points to the location that has the user
* sense buffer address
*/
- sense_buff = (unsigned long *) ((unsigned long)ioc->frame.raw +
- ioc->sense_off);
+ sense_ptr = (u32 *) ((unsigned long)ioc->frame.raw +
+ ioc->sense_off);
- if (copy_to_user((void __user *)(unsigned long)(*sense_buff),
- sense, ioc->sense_len)) {
+ if (copy_to_user((void __user *)((unsigned long)(*sense_ptr)),
+ sense, ioc->sense_len)) {
printk(KERN_ERR "megasas: Failed to copy out to user "
"sense data\n");
error = -EFAULT;
static ssize_t
megasas_sysfs_show_dbg_lvl(struct device_driver *dd, char *buf)
{
- return sprintf(buf,"%u",megasas_dbg_lvl);
+ return sprintf(buf, "%u\n", megasas_dbg_lvl);
}
static ssize_t
}
static DRIVER_ATTR(dbg_lvl, S_IRUGO|S_IWUGO, megasas_sysfs_show_dbg_lvl,
- megasas_sysfs_set_dbg_lvl);
+ megasas_sysfs_set_dbg_lvl);
+
+static ssize_t
+megasas_sysfs_show_poll_mode_io(struct device_driver *dd, char *buf)
+{
+ return sprintf(buf, "%u\n", poll_mode_io);
+}
+
+static ssize_t
+megasas_sysfs_set_poll_mode_io(struct device_driver *dd,
+ const char *buf, size_t count)
+{
+ int retval = count;
+ int tmp = poll_mode_io;
+ int i;
+ struct megasas_instance *instance;
+
+ if (sscanf(buf, "%u", &poll_mode_io) < 1) {
+ printk(KERN_ERR "megasas: could not set poll_mode_io\n");
+ retval = -EINVAL;
+ }
+
+ /*
+ * Check if poll_mode_io is already set or is same as previous value
+ */
+ if ((tmp && poll_mode_io) || (tmp == poll_mode_io))
+ goto out;
+
+ if (poll_mode_io) {
+ /*
+ * Start timers for all adapters
+ */
+ for (i = 0; i < megasas_mgmt_info.max_index; i++) {
+ instance = megasas_mgmt_info.instance[i];
+ if (instance) {
+ megasas_start_timer(instance,
+ &instance->io_completion_timer,
+ megasas_io_completion_timer,
+ MEGASAS_COMPLETION_TIMER_INTERVAL);
+ }
+ }
+ } else {
+ /*
+ * Delete timers for all adapters
+ */
+ for (i = 0; i < megasas_mgmt_info.max_index; i++) {
+ instance = megasas_mgmt_info.instance[i];
+ if (instance)
+ del_timer_sync(&instance->io_completion_timer);
+ }
+ }
+
+out:
+ return retval;
+}
+
+static DRIVER_ATTR(poll_mode_io, S_IRUGO|S_IWUGO,
+ megasas_sysfs_show_poll_mode_io,
+ megasas_sysfs_set_poll_mode_io);
/**
* megasas_init - Driver load entry point
&driver_attr_dbg_lvl);
if (rval)
goto err_dcf_dbg_lvl;
+ rval = driver_create_file(&megasas_pci_driver.driver,
+ &driver_attr_poll_mode_io);
+ if (rval)
+ goto err_dcf_poll_mode_io;
return rval;
+
+err_dcf_poll_mode_io:
+ driver_remove_file(&megasas_pci_driver.driver,
+ &driver_attr_dbg_lvl);
err_dcf_dbg_lvl:
driver_remove_file(&megasas_pci_driver.driver,
&driver_attr_release_date);
*/
static void __exit megasas_exit(void)
{
+ driver_remove_file(&megasas_pci_driver.driver,
+ &driver_attr_poll_mode_io);
driver_remove_file(&megasas_pci_driver.driver,
&driver_attr_dbg_lvl);
driver_remove_file(&megasas_pci_driver.driver,
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