diff options
Diffstat (limited to 'drivers/scsi/mvsas/mv_init.c')
-rw-r--r-- | drivers/scsi/mvsas/mv_init.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/drivers/scsi/mvsas/mv_init.c b/drivers/scsi/mvsas/mv_init.c index 9f1cccc..531093d 100644 --- a/drivers/scsi/mvsas/mv_init.c +++ b/drivers/scsi/mvsas/mv_init.c @@ -34,6 +34,8 @@ MODULE_PARM_DESC(collector, "\n" "\tThe mvsas SAS LLDD supports both modes.\n" "\tDefault: 1 (Direct Mode).\n"); +int interrupt_coalescing = 0x80; + static struct scsi_transport_template *mvs_stt; struct kmem_cache *mvs_task_list_cache; static const struct mvs_chip_info mvs_chips[] = { @@ -48,6 +50,8 @@ static const struct mvs_chip_info mvs_chips[] = { [chip_1320] = { 2, 4, 0x800, 17, 64, 9, &mvs_94xx_dispatch, }, }; +struct device_attribute *mvst_host_attrs[]; + #define SOC_SAS_NUM 2 #define SG_MX 64 @@ -74,6 +78,7 @@ static struct scsi_host_template mvs_sht = { .slave_alloc = mvs_slave_alloc, .target_destroy = sas_target_destroy, .ioctl = sas_ioctl, + .shost_attrs = mvst_host_attrs, }; static struct sas_domain_function_template mvs_transport_ops = { @@ -706,6 +711,70 @@ static struct pci_driver mvs_pci_driver = { .remove = __devexit_p(mvs_pci_remove), }; +static ssize_t +mvs_show_driver_version(struct device *cdev, + struct device_attribute *attr, char *buffer) +{ + return snprintf(buffer, PAGE_SIZE, "%s\n", DRV_VERSION); +} + +static DEVICE_ATTR(driver_version, + S_IRUGO, + mvs_show_driver_version, + NULL); + +static ssize_t +mvs_store_interrupt_coalescing(struct device *cdev, + struct device_attribute *attr, + const char *buffer, size_t size) +{ + int val = 0; + struct mvs_info *mvi = NULL; + struct Scsi_Host *shost = class_to_shost(cdev); + struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost); + u8 i, core_nr; + if (buffer == NULL) + return size; + + if (sscanf(buffer, "%d", &val) != 1) + return -EINVAL; + + if (val >= 0x10000) { + mv_dprintk("interrupt coalescing timer %d us is" + "too long\n", val); + return strlen(buffer); + } + + interrupt_coalescing = val; + + core_nr = ((struct mvs_prv_info *)sha->lldd_ha)->n_host; + mvi = ((struct mvs_prv_info *)sha->lldd_ha)->mvi[0]; + + if (unlikely(!mvi)) + return -EINVAL; + + for (i = 0; i < core_nr; i++) { + mvi = ((struct mvs_prv_info *)sha->lldd_ha)->mvi[i]; + if (MVS_CHIP_DISP->tune_interrupt) + MVS_CHIP_DISP->tune_interrupt(mvi, + interrupt_coalescing); + } + mv_dprintk("set interrupt coalescing time to %d us\n", + interrupt_coalescing); + return strlen(buffer); +} + +static ssize_t mvs_show_interrupt_coalescing(struct device *cdev, + struct device_attribute *attr, char *buffer) +{ + return snprintf(buffer, PAGE_SIZE, "%d\n", interrupt_coalescing); +} + +static DEVICE_ATTR(interrupt_coalescing, + S_IRUGO|S_IWUSR, + mvs_show_interrupt_coalescing, + mvs_store_interrupt_coalescing); + /* task handler */ struct task_struct *mvs_th; static int __init mvs_init(void) @@ -742,6 +811,12 @@ static void __exit mvs_exit(void) kmem_cache_destroy(mvs_task_list_cache); } +struct device_attribute *mvst_host_attrs[] = { + &dev_attr_driver_version, + &dev_attr_interrupt_coalescing, + NULL, +}; + module_init(mvs_init); module_exit(mvs_exit); |