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authorSong Liu <songliubraving@fb.com>2014-12-30 14:46:18 -0800
committerChristoph Hellwig <hch@lst.de>2015-01-09 15:44:19 +0100
commit08024885a2a3ed432716e9d50046a620a5b2df05 (patch)
tree52e0042dac2c8651641987da49163908c3305e74 /drivers/scsi/ses.c
parent921ce7f5786052749a22a75780f5ce1a456bcdc6 (diff)
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ses: Add power_status to SES device slot
Add power_status to SES device slot, so we can power on/off the HDDs behind the enclosure. Check firmware status in ses_set_* before sending control pages to firmware. Signed-off-by: Song Liu <songliubraving@fb.com> Acked-by: Dan Williams <dan.j.williams@intel.com> Reviewed-by: Jens Axboe <axboe@fb.com> Cc: Hannes Reinecke <hare@suse.de> Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/scsi/ses.c')
-rw-r--r--drivers/scsi/ses.c98
1 files changed, 89 insertions, 9 deletions
diff --git a/drivers/scsi/ses.c b/drivers/scsi/ses.c
index 433de8e6f538..dcb0d76d7312 100644
--- a/drivers/scsi/ses.c
+++ b/drivers/scsi/ses.c
@@ -67,6 +67,20 @@ static int ses_probe(struct device *dev)
#define SES_TIMEOUT (30 * HZ)
#define SES_RETRIES 3
+static void init_device_slot_control(unsigned char *dest_desc,
+ struct enclosure_component *ecomp,
+ unsigned char *status)
+{
+ memcpy(dest_desc, status, 4);
+ dest_desc[0] = 0;
+ /* only clear byte 1 for ENCLOSURE_COMPONENT_DEVICE */
+ if (ecomp->type == ENCLOSURE_COMPONENT_DEVICE)
+ dest_desc[1] = 0;
+ dest_desc[2] &= 0xde;
+ dest_desc[3] &= 0x3c;
+}
+
+
static int ses_recv_diag(struct scsi_device *sdev, int page_code,
void *buf, int bufflen)
{
@@ -178,14 +192,22 @@ static int ses_set_fault(struct enclosure_device *edev,
struct enclosure_component *ecomp,
enum enclosure_component_setting val)
{
- unsigned char desc[4] = {0 };
+ unsigned char desc[4];
+ unsigned char *desc_ptr;
+
+ desc_ptr = ses_get_page2_descriptor(edev, ecomp);
+
+ if (!desc_ptr)
+ return -EIO;
+
+ init_device_slot_control(desc, ecomp, desc_ptr);
switch (val) {
case ENCLOSURE_SETTING_DISABLED:
- /* zero is disabled */
+ desc[3] &= 0xdf;
break;
case ENCLOSURE_SETTING_ENABLED:
- desc[3] = 0x20;
+ desc[3] |= 0x20;
break;
default:
/* SES doesn't do the SGPIO blink settings */
@@ -219,14 +241,22 @@ static int ses_set_locate(struct enclosure_device *edev,
struct enclosure_component *ecomp,
enum enclosure_component_setting val)
{
- unsigned char desc[4] = {0 };
+ unsigned char desc[4];
+ unsigned char *desc_ptr;
+
+ desc_ptr = ses_get_page2_descriptor(edev, ecomp);
+
+ if (!desc_ptr)
+ return -EIO;
+
+ init_device_slot_control(desc, ecomp, desc_ptr);
switch (val) {
case ENCLOSURE_SETTING_DISABLED:
- /* zero is disabled */
+ desc[2] &= 0xfd;
break;
case ENCLOSURE_SETTING_ENABLED:
- desc[2] = 0x02;
+ desc[2] |= 0x02;
break;
default:
/* SES doesn't do the SGPIO blink settings */
@@ -239,15 +269,23 @@ static int ses_set_active(struct enclosure_device *edev,
struct enclosure_component *ecomp,
enum enclosure_component_setting val)
{
- unsigned char desc[4] = {0 };
+ unsigned char desc[4];
+ unsigned char *desc_ptr;
+
+ desc_ptr = ses_get_page2_descriptor(edev, ecomp);
+
+ if (!desc_ptr)
+ return -EIO;
+
+ init_device_slot_control(desc, ecomp, desc_ptr);
switch (val) {
case ENCLOSURE_SETTING_DISABLED:
- /* zero is disabled */
+ desc[2] &= 0x7f;
ecomp->active = 0;
break;
case ENCLOSURE_SETTING_ENABLED:
- desc[2] = 0x80;
+ desc[2] |= 0x80;
ecomp->active = 1;
break;
default:
@@ -265,12 +303,53 @@ static int ses_show_id(struct enclosure_device *edev, char *buf)
return sprintf(buf, "%#llx\n", id);
}
+static void ses_get_power_status(struct enclosure_device *edev,
+ struct enclosure_component *ecomp)
+{
+ unsigned char *desc;
+
+ desc = ses_get_page2_descriptor(edev, ecomp);
+ if (desc)
+ ecomp->power_status = (desc[3] & 0x10) ? 0 : 1;
+}
+
+static int ses_set_power_status(struct enclosure_device *edev,
+ struct enclosure_component *ecomp,
+ int val)
+{
+ unsigned char desc[4];
+ unsigned char *desc_ptr;
+
+ desc_ptr = ses_get_page2_descriptor(edev, ecomp);
+
+ if (!desc_ptr)
+ return -EIO;
+
+ init_device_slot_control(desc, ecomp, desc_ptr);
+
+ switch (val) {
+ /* power = 1 is device_off = 0 and vice versa */
+ case 0:
+ desc[3] |= 0x10;
+ break;
+ case 1:
+ desc[3] &= 0xef;
+ break;
+ default:
+ return -EINVAL;
+ }
+ ecomp->power_status = val;
+ return ses_set_page2_descriptor(edev, ecomp, desc);
+}
+
static struct enclosure_component_callbacks ses_enclosure_callbacks = {
.get_fault = ses_get_fault,
.set_fault = ses_set_fault,
.get_status = ses_get_status,
.get_locate = ses_get_locate,
.set_locate = ses_set_locate,
+ .get_power_status = ses_get_power_status,
+ .set_power_status = ses_set_power_status,
.set_active = ses_set_active,
.show_id = ses_show_id,
};
@@ -449,6 +528,7 @@ static void ses_enclosure_data_process(struct enclosure_device *edev,
ecomp = &edev->component[components++];
if (!IS_ERR(ecomp)) {
+ ses_get_power_status(edev, ecomp);
if (addl_desc_ptr)
ses_process_descriptor(
ecomp,