[SCSI] ipr: Write caching state host attribute
Adds a scsi_host sysfs attribute and module parm to enable/disable the write cache on an ipr adapter. Signed-off-by: Brian King <brking@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
brking@us.ibm.com
James Bottomley
parent
692aebfc69
commit
622750406a
|
|
@ -91,6 +91,7 @@ static unsigned int ipr_max_speed = 1;
|
|||
static int ipr_testmode = 0;
|
||||
static unsigned int ipr_fastfail = 0;
|
||||
static unsigned int ipr_transop_timeout = IPR_OPERATIONAL_TIMEOUT;
|
||||
static unsigned int ipr_enable_cache = 1;
|
||||
static DEFINE_SPINLOCK(ipr_driver_lock);
|
||||
|
||||
/* This table describes the differences between DMA controller chips */
|
||||
|
|
@ -150,6 +151,8 @@ module_param_named(fastfail, ipr_fastfail, int, 0);
|
|||
MODULE_PARM_DESC(fastfail, "Reduce timeouts and retries");
|
||||
module_param_named(transop_timeout, ipr_transop_timeout, int, 0);
|
||||
MODULE_PARM_DESC(transop_timeout, "Time in seconds to wait for adapter to come operational (default: 300)");
|
||||
module_param_named(enable_cache, ipr_enable_cache, int, 0);
|
||||
MODULE_PARM_DESC(enable_cache, "Enable adapter's non-volatile write cache (default: 1)");
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_VERSION(IPR_DRIVER_VERSION);
|
||||
|
||||
|
|
@ -1937,6 +1940,103 @@ static struct bin_attribute ipr_trace_attr = {
|
|||
};
|
||||
#endif
|
||||
|
||||
static const struct {
|
||||
enum ipr_cache_state state;
|
||||
char *name;
|
||||
} cache_state [] = {
|
||||
{ CACHE_NONE, "none" },
|
||||
{ CACHE_DISABLED, "disabled" },
|
||||
{ CACHE_ENABLED, "enabled" }
|
||||
};
|
||||
|
||||
/**
|
||||
* ipr_show_write_caching - Show the write caching attribute
|
||||
* @class_dev: class device struct
|
||||
* @buf: buffer
|
||||
*
|
||||
* Return value:
|
||||
* number of bytes printed to buffer
|
||||
**/
|
||||
static ssize_t ipr_show_write_caching(struct class_device *class_dev, char *buf)
|
||||
{
|
||||
struct Scsi_Host *shost = class_to_shost(class_dev);
|
||||
struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
|
||||
unsigned long lock_flags = 0;
|
||||
int i, len = 0;
|
||||
|
||||
spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
|
||||
for (i = 0; i < ARRAY_SIZE(cache_state); i++) {
|
||||
if (cache_state[i].state == ioa_cfg->cache_state) {
|
||||
len = snprintf(buf, PAGE_SIZE, "%s\n", cache_state[i].name);
|
||||
break;
|
||||
}
|
||||
}
|
||||
spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
|
||||
return len;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* ipr_store_write_caching - Enable/disable adapter write cache
|
||||
* @class_dev: class_device struct
|
||||
* @buf: buffer
|
||||
* @count: buffer size
|
||||
*
|
||||
* This function will enable/disable adapter write cache.
|
||||
*
|
||||
* Return value:
|
||||
* count on success / other on failure
|
||||
**/
|
||||
static ssize_t ipr_store_write_caching(struct class_device *class_dev,
|
||||
const char *buf, size_t count)
|
||||
{
|
||||
struct Scsi_Host *shost = class_to_shost(class_dev);
|
||||
struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
|
||||
unsigned long lock_flags = 0;
|
||||
enum ipr_cache_state new_state = CACHE_INVALID;
|
||||
int i;
|
||||
|
||||
if (!capable(CAP_SYS_ADMIN))
|
||||
return -EACCES;
|
||||
if (ioa_cfg->cache_state == CACHE_NONE)
|
||||
return -EINVAL;
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(cache_state); i++) {
|
||||
if (!strncmp(cache_state[i].name, buf, strlen(cache_state[i].name))) {
|
||||
new_state = cache_state[i].state;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (new_state != CACHE_DISABLED && new_state != CACHE_ENABLED)
|
||||
return -EINVAL;
|
||||
|
||||
spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
|
||||
if (ioa_cfg->cache_state == new_state) {
|
||||
spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
|
||||
return count;
|
||||
}
|
||||
|
||||
ioa_cfg->cache_state = new_state;
|
||||
dev_info(&ioa_cfg->pdev->dev, "%s adapter write cache.\n",
|
||||
new_state == CACHE_ENABLED ? "Enabling" : "Disabling");
|
||||
if (!ioa_cfg->in_reset_reload)
|
||||
ipr_initiate_ioa_reset(ioa_cfg, IPR_SHUTDOWN_NORMAL);
|
||||
spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
|
||||
wait_event(ioa_cfg->reset_wait_q, !ioa_cfg->in_reset_reload);
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
static struct class_device_attribute ipr_ioa_cache_attr = {
|
||||
.attr = {
|
||||
.name = "write_cache",
|
||||
.mode = S_IRUGO | S_IWUSR,
|
||||
},
|
||||
.show = ipr_show_write_caching,
|
||||
.store = ipr_store_write_caching
|
||||
};
|
||||
|
||||
/**
|
||||
* ipr_show_fw_version - Show the firmware version
|
||||
* @class_dev: class device struct
|
||||
|
|
@ -2406,6 +2506,7 @@ static struct class_device_attribute *ipr_ioa_attrs[] = {
|
|||
&ipr_diagnostics_attr,
|
||||
&ipr_ioa_reset_attr,
|
||||
&ipr_update_fw_attr,
|
||||
&ipr_ioa_cache_attr,
|
||||
NULL,
|
||||
};
|
||||
|
||||
|
|
@ -4147,6 +4248,36 @@ static int ipr_set_supported_devs(struct ipr_cmnd *ipr_cmd)
|
|||
return IPR_RC_JOB_CONTINUE;
|
||||
}
|
||||
|
||||
/**
|
||||
* ipr_setup_write_cache - Disable write cache if needed
|
||||
* @ipr_cmd: ipr command struct
|
||||
*
|
||||
* This function sets up adapters write cache to desired setting
|
||||
*
|
||||
* Return value:
|
||||
* IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
|
||||
**/
|
||||
static int ipr_setup_write_cache(struct ipr_cmnd *ipr_cmd)
|
||||
{
|
||||
struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
|
||||
|
||||
ipr_cmd->job_step = ipr_set_supported_devs;
|
||||
ipr_cmd->u.res = list_entry(ioa_cfg->used_res_q.next,
|
||||
struct ipr_resource_entry, queue);
|
||||
|
||||
if (ioa_cfg->cache_state != CACHE_DISABLED)
|
||||
return IPR_RC_JOB_CONTINUE;
|
||||
|
||||
ipr_cmd->ioarcb.res_handle = cpu_to_be32(IPR_IOA_RES_HANDLE);
|
||||
ipr_cmd->ioarcb.cmd_pkt.request_type = IPR_RQTYPE_IOACMD;
|
||||
ipr_cmd->ioarcb.cmd_pkt.cdb[0] = IPR_IOA_SHUTDOWN;
|
||||
ipr_cmd->ioarcb.cmd_pkt.cdb[1] = IPR_SHUTDOWN_PREPARE_FOR_NORMAL;
|
||||
|
||||
ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout, IPR_INTERNAL_TIMEOUT);
|
||||
|
||||
return IPR_RC_JOB_RETURN;
|
||||
}
|
||||
|
||||
/**
|
||||
* ipr_get_mode_page - Locate specified mode page
|
||||
* @mode_pages: mode page buffer
|
||||
|
|
@ -4358,10 +4489,7 @@ static int ipr_ioafp_mode_select_page28(struct ipr_cmnd *ipr_cmd)
|
|||
ioa_cfg->vpd_cbs_dma + offsetof(struct ipr_misc_cbs, mode_pages),
|
||||
length);
|
||||
|
||||
ipr_cmd->job_step = ipr_set_supported_devs;
|
||||
ipr_cmd->u.res = list_entry(ioa_cfg->used_res_q.next,
|
||||
struct ipr_resource_entry, queue);
|
||||
|
||||
ipr_cmd->job_step = ipr_setup_write_cache;
|
||||
ipr_do_req(ipr_cmd, ipr_reset_ioa_job, ipr_timeout, IPR_INTERNAL_TIMEOUT);
|
||||
|
||||
LEAVE;
|
||||
|
|
@ -4580,6 +4708,27 @@ static void ipr_ioafp_inquiry(struct ipr_cmnd *ipr_cmd, u8 flags, u8 page,
|
|||
LEAVE;
|
||||
}
|
||||
|
||||
/**
|
||||
* ipr_inquiry_page_supported - Is the given inquiry page supported
|
||||
* @page0: inquiry page 0 buffer
|
||||
* @page: page code.
|
||||
*
|
||||
* This function determines if the specified inquiry page is supported.
|
||||
*
|
||||
* Return value:
|
||||
* 1 if page is supported / 0 if not
|
||||
**/
|
||||
static int ipr_inquiry_page_supported(struct ipr_inquiry_page0 *page0, u8 page)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < min_t(u8, page0->len, IPR_INQUIRY_PAGE0_ENTRIES); i++)
|
||||
if (page0->page[i] == page)
|
||||
return 1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* ipr_ioafp_page3_inquiry - Send a Page 3 Inquiry to the adapter.
|
||||
* @ipr_cmd: ipr command struct
|
||||
|
|
@ -4591,6 +4740,36 @@ static void ipr_ioafp_inquiry(struct ipr_cmnd *ipr_cmd, u8 flags, u8 page,
|
|||
* IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
|
||||
**/
|
||||
static int ipr_ioafp_page3_inquiry(struct ipr_cmnd *ipr_cmd)
|
||||
{
|
||||
struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
|
||||
struct ipr_inquiry_page0 *page0 = &ioa_cfg->vpd_cbs->page0_data;
|
||||
|
||||
ENTER;
|
||||
|
||||
if (!ipr_inquiry_page_supported(page0, 1))
|
||||
ioa_cfg->cache_state = CACHE_NONE;
|
||||
|
||||
ipr_cmd->job_step = ipr_ioafp_query_ioa_cfg;
|
||||
|
||||
ipr_ioafp_inquiry(ipr_cmd, 1, 3,
|
||||
ioa_cfg->vpd_cbs_dma + offsetof(struct ipr_misc_cbs, page3_data),
|
||||
sizeof(struct ipr_inquiry_page3));
|
||||
|
||||
LEAVE;
|
||||
return IPR_RC_JOB_RETURN;
|
||||
}
|
||||
|
||||
/**
|
||||
* ipr_ioafp_page0_inquiry - Send a Page 0 Inquiry to the adapter.
|
||||
* @ipr_cmd: ipr command struct
|
||||
*
|
||||
* This function sends a Page 0 inquiry to the adapter
|
||||
* to retrieve supported inquiry pages.
|
||||
*
|
||||
* Return value:
|
||||
* IPR_RC_JOB_CONTINUE / IPR_RC_JOB_RETURN
|
||||
**/
|
||||
static int ipr_ioafp_page0_inquiry(struct ipr_cmnd *ipr_cmd)
|
||||
{
|
||||
struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
|
||||
char type[5];
|
||||
|
|
@ -4602,11 +4781,11 @@ static int ipr_ioafp_page3_inquiry(struct ipr_cmnd *ipr_cmd)
|
|||
type[4] = '\0';
|
||||
ioa_cfg->type = simple_strtoul((char *)type, NULL, 16);
|
||||
|
||||
ipr_cmd->job_step = ipr_ioafp_query_ioa_cfg;
|
||||
ipr_cmd->job_step = ipr_ioafp_page3_inquiry;
|
||||
|
||||
ipr_ioafp_inquiry(ipr_cmd, 1, 3,
|
||||
ioa_cfg->vpd_cbs_dma + offsetof(struct ipr_misc_cbs, page3_data),
|
||||
sizeof(struct ipr_inquiry_page3));
|
||||
ipr_ioafp_inquiry(ipr_cmd, 1, 0,
|
||||
ioa_cfg->vpd_cbs_dma + offsetof(struct ipr_misc_cbs, page0_data),
|
||||
sizeof(struct ipr_inquiry_page0));
|
||||
|
||||
LEAVE;
|
||||
return IPR_RC_JOB_RETURN;
|
||||
|
|
@ -4626,7 +4805,7 @@ static int ipr_ioafp_std_inquiry(struct ipr_cmnd *ipr_cmd)
|
|||
struct ipr_ioa_cfg *ioa_cfg = ipr_cmd->ioa_cfg;
|
||||
|
||||
ENTER;
|
||||
ipr_cmd->job_step = ipr_ioafp_page3_inquiry;
|
||||
ipr_cmd->job_step = ipr_ioafp_page0_inquiry;
|
||||
|
||||
ipr_ioafp_inquiry(ipr_cmd, 0, 0,
|
||||
ioa_cfg->vpd_cbs_dma + offsetof(struct ipr_misc_cbs, ioa_vpd),
|
||||
|
|
@ -5629,6 +5808,10 @@ static void __devinit ipr_init_ioa_cfg(struct ipr_ioa_cfg *ioa_cfg,
|
|||
INIT_WORK(&ioa_cfg->work_q, ipr_worker_thread, ioa_cfg);
|
||||
init_waitqueue_head(&ioa_cfg->reset_wait_q);
|
||||
ioa_cfg->sdt_state = INACTIVE;
|
||||
if (ipr_enable_cache)
|
||||
ioa_cfg->cache_state = CACHE_ENABLED;
|
||||
else
|
||||
ioa_cfg->cache_state = CACHE_DISABLED;
|
||||
|
||||
ipr_initialize_bus_attr(ioa_cfg);
|
||||
|
||||
|
|
|
|||
|
|
@ -541,6 +541,15 @@ struct ipr_inquiry_page3 {
|
|||
u8 patch_number[4];
|
||||
}__attribute__((packed));
|
||||
|
||||
#define IPR_INQUIRY_PAGE0_ENTRIES 20
|
||||
struct ipr_inquiry_page0 {
|
||||
u8 peri_qual_dev_type;
|
||||
u8 page_code;
|
||||
u8 reserved1;
|
||||
u8 len;
|
||||
u8 page[IPR_INQUIRY_PAGE0_ENTRIES];
|
||||
}__attribute__((packed));
|
||||
|
||||
struct ipr_hostrcb_device_data_entry {
|
||||
struct ipr_vpd vpd;
|
||||
struct ipr_res_addr dev_res_addr;
|
||||
|
|
@ -731,6 +740,7 @@ struct ipr_resource_table {
|
|||
|
||||
struct ipr_misc_cbs {
|
||||
struct ipr_ioa_vpd ioa_vpd;
|
||||
struct ipr_inquiry_page0 page0_data;
|
||||
struct ipr_inquiry_page3 page3_data;
|
||||
struct ipr_mode_pages mode_pages;
|
||||
struct ipr_supported_device supp_dev;
|
||||
|
|
@ -813,6 +823,13 @@ enum ipr_sdt_state {
|
|||
DUMP_OBTAINED
|
||||
};
|
||||
|
||||
enum ipr_cache_state {
|
||||
CACHE_NONE,
|
||||
CACHE_DISABLED,
|
||||
CACHE_ENABLED,
|
||||
CACHE_INVALID
|
||||
};
|
||||
|
||||
/* Per-controller data */
|
||||
struct ipr_ioa_cfg {
|
||||
char eye_catcher[8];
|
||||
|
|
@ -829,6 +846,7 @@ struct ipr_ioa_cfg {
|
|||
u8 allow_cmds:1;
|
||||
u8 allow_ml_add_del:1;
|
||||
|
||||
enum ipr_cache_state cache_state;
|
||||
u16 type; /* CCIN of the card */
|
||||
|
||||
u8 log_level;
|
||||
|
|
|
|||
Loading…
Reference in New Issue