[SCSI] aacraid: Add Power Management support

For firmware that supports the feature(s), add the ability to start or
stop an array using the associated SCSI commands, to automatically
manage the spin-up of an array on new I/O reporting back the
appropriate check conditions and actions in cooperation with the
normal timeout mechanisms and enable the blackout period management in
the Firmware associated with the background spin-down of the arrays
when the Firmware times out and deems the arrays as idle.

Signed-off-by: Mark Salyzyn <aacraid@adaptec.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

4 files changed, 154 insertions, 11 deletions

diff --git a/drivers/scsi/aacraid/aachba.c b/drivers/scsi/aacraid/aachba.c
index 460d4024c46c..aa4e77c25273 100644
--- a/drivers/scsi/aacraid/aachba.c
+++ b/drivers/scsi/aacraid/aachba.c
@@ -498,6 +498,11 @@ static void _aac_probe_container2(void * context, struct fib * fibptr)
                     (le32_to_cpu(dresp->mnt[0].vol) != CT_NONE) &&
                     (le32_to_cpu(dresp->mnt[0].state) != FSCS_HIDDEN)) {
                         fsa_dev_ptr->valid = 1;
+                        /* sense_key holds the current state of the spin-up */
+                        if (dresp->mnt[0].state & cpu_to_le32(FSCS_NOT_READY))
+                                fsa_dev_ptr->sense_data.sense_key = NOT_READY;
+                        else if (fsa_dev_ptr->sense_data.sense_key == NOT_READY)
+                                fsa_dev_ptr->sense_data.sense_key = NO_SENSE;
                         fsa_dev_ptr->type = le32_to_cpu(dresp->mnt[0].vol);
                         fsa_dev_ptr->size
                           = ((u64)le32_to_cpu(dresp->mnt[0].capacity)) +
@@ -1509,20 +1514,35 @@ static void io_callback(void *context, struct fib * fibptr)
         scsi_dma_unmap(scsicmd);
 
         readreply = (struct aac_read_reply *)fib_data(fibptr);
-        if (le32_to_cpu(readreply->status) == ST_OK)
-                scsicmd->result = DID_OK << 16 | COMMAND_COMPLETE << 8 | SAM_STAT_GOOD;
-        else {
+        switch (le32_to_cpu(readreply->status)) {
+        case ST_OK:
+                scsicmd->result = DID_OK << 16 | COMMAND_COMPLETE << 8 |
+                        SAM_STAT_GOOD;
+                dev->fsa_dev[cid].sense_data.sense_key = NO_SENSE;
+                break;
+        case ST_NOT_READY:
+                scsicmd->result = DID_OK << 16 | COMMAND_COMPLETE << 8 |
+                        SAM_STAT_CHECK_CONDITION;
+                set_sense(&dev->fsa_dev[cid].sense_data, NOT_READY,
+                  SENCODE_BECOMING_READY, ASENCODE_BECOMING_READY, 0, 0);
+                memcpy(scsicmd->sense_buffer, &dev->fsa_dev[cid].sense_data,
+                       min_t(size_t, sizeof(dev->fsa_dev[cid].sense_data),
+                             SCSI_SENSE_BUFFERSIZE));
+                break;
+        default:
 #ifdef AAC_DETAILED_STATUS_INFO
                 printk(KERN_WARNING "io_callback: io failed, status = %d\n",
                   le32_to_cpu(readreply->status));
 #endif
-                scsicmd->result = DID_OK << 16 | COMMAND_COMPLETE << 8 | SAM_STAT_CHECK_CONDITION;
+                scsicmd->result = DID_OK << 16 | COMMAND_COMPLETE << 8 |
+                        SAM_STAT_CHECK_CONDITION;
                 set_sense(&dev->fsa_dev[cid].sense_data,
                   HARDWARE_ERROR, SENCODE_INTERNAL_TARGET_FAILURE,
                   ASENCODE_INTERNAL_TARGET_FAILURE, 0, 0);
                 memcpy(scsicmd->sense_buffer, &dev->fsa_dev[cid].sense_data,
                        min_t(size_t, sizeof(dev->fsa_dev[cid].sense_data),
                              SCSI_SENSE_BUFFERSIZE));
+                break;
         }
         aac_fib_complete(fibptr);
         aac_fib_free(fibptr);
@@ -1863,6 +1883,84 @@ static int aac_synchronize(struct scsi_cmnd *scsicmd)
         return SCSI_MLQUEUE_HOST_BUSY;
 }
 
+static void aac_start_stop_callback(void *context, struct fib *fibptr)
+{
+        struct scsi_cmnd *scsicmd = context;
+
+        if (!aac_valid_context(scsicmd, fibptr))
+                return;
+
+        BUG_ON(fibptr == NULL);
+
+        scsicmd->result = DID_OK << 16 | COMMAND_COMPLETE << 8 | SAM_STAT_GOOD;
+
+        aac_fib_complete(fibptr);
+        aac_fib_free(fibptr);
+        scsicmd->scsi_done(scsicmd);
+}
+
+static int aac_start_stop(struct scsi_cmnd *scsicmd)
+{
+        int status;
+        struct fib *cmd_fibcontext;
+        struct aac_power_management *pmcmd;
+        struct scsi_device *sdev = scsicmd->device;
+        struct aac_dev *aac = (struct aac_dev *)sdev->host->hostdata;
+
+        if (!(aac->supplement_adapter_info.SupportedOptions2 &
+              AAC_OPTION_POWER_MANAGEMENT)) {
+                scsicmd->result = DID_OK << 16 | COMMAND_COMPLETE << 8 |
+                                  SAM_STAT_GOOD;
+                scsicmd->scsi_done(scsicmd);
+                return 0;
+        }
+
+        if (aac->in_reset)
+                return SCSI_MLQUEUE_HOST_BUSY;
+
+        /*
+         *      Allocate and initialize a Fib
+         */
+        cmd_fibcontext = aac_fib_alloc(aac);
+        if (!cmd_fibcontext)
+                return SCSI_MLQUEUE_HOST_BUSY;
+
+        aac_fib_init(cmd_fibcontext);
+
+        pmcmd = fib_data(cmd_fibcontext);
+        pmcmd->command = cpu_to_le32(VM_ContainerConfig);
+        pmcmd->type = cpu_to_le32(CT_POWER_MANAGEMENT);
+        /* Eject bit ignored, not relevant */
+        pmcmd->sub = (scsicmd->cmnd[4] & 1) ?
+                cpu_to_le32(CT_PM_START_UNIT) : cpu_to_le32(CT_PM_STOP_UNIT);
+        pmcmd->cid = cpu_to_le32(sdev_id(sdev));
+        pmcmd->parm = (scsicmd->cmnd[1] & 1) ?
+                cpu_to_le32(CT_PM_UNIT_IMMEDIATE) : 0;
+
+        /*
+         *      Now send the Fib to the adapter
+         */
+        status = aac_fib_send(ContainerCommand,
+                  cmd_fibcontext,
+                  sizeof(struct aac_power_management),
+                  FsaNormal,
+                  0, 1,
+                  (fib_callback)aac_start_stop_callback,
+                  (void *)scsicmd);
+
+        /*
+         *      Check that the command queued to the controller
+         */
+        if (status == -EINPROGRESS) {
+                scsicmd->SCp.phase = AAC_OWNER_FIRMWARE;
+                return 0;
+        }
+
+        aac_fib_complete(cmd_fibcontext);
+        aac_fib_free(cmd_fibcontext);
+        return SCSI_MLQUEUE_HOST_BUSY;
+}
+
 /**
  *      aac_scsi_cmd()          -       Process SCSI command
  *      @scsicmd:               SCSI command block
@@ -1899,7 +1997,9 @@ int aac_scsi_cmd(struct scsi_cmnd * scsicmd)
                          *      If the target container doesn't exist, it may have
                          *      been newly created
                          */
-                        if ((fsa_dev_ptr[cid].valid & 1) == 0) {
+                        if (((fsa_dev_ptr[cid].valid & 1) == 0) ||
+                          (fsa_dev_ptr[cid].sense_data.sense_key ==
+                           NOT_READY)) {
                                 switch (scsicmd->cmnd[0]) {
                                 case SERVICE_ACTION_IN:
                                         if (!(dev->raw_io_interface) ||
@@ -2091,8 +2191,8 @@ int aac_scsi_cmd(struct scsi_cmnd * scsicmd)
                 scsi_sg_copy_from_buffer(scsicmd, cp, sizeof(cp));
                 /* Do not cache partition table for arrays */
                 scsicmd->device->removable = 1;
-
-                scsicmd->result = DID_OK << 16 | COMMAND_COMPLETE << 8 | SAM_STAT_GOOD;
+                scsicmd->result = DID_OK << 16 | COMMAND_COMPLETE << 8 |
+                  SAM_STAT_GOOD;
                 scsicmd->scsi_done(scsicmd);
 
                 return 0;
@@ -2187,15 +2287,32 @@ int aac_scsi_cmd(struct scsi_cmnd * scsicmd)
          *      These commands are all No-Ops
          */
         case TEST_UNIT_READY:
+                if (fsa_dev_ptr[cid].sense_data.sense_key == NOT_READY) {
+                        scsicmd->result = DID_OK << 16 | COMMAND_COMPLETE << 8 |
+                                SAM_STAT_CHECK_CONDITION;
+                        set_sense(&dev->fsa_dev[cid].sense_data,
+                                  NOT_READY, SENCODE_BECOMING_READY,
+                                  ASENCODE_BECOMING_READY, 0, 0);
+                        memcpy(scsicmd->sense_buffer,
+                               &dev->fsa_dev[cid].sense_data,
+                               min_t(size_t,
+                                     sizeof(dev->fsa_dev[cid].sense_data),
+                                     SCSI_SENSE_BUFFERSIZE));
+                        scsicmd->scsi_done(scsicmd);
+                        return 0;
+                }
+                /* FALLTHRU */
         case RESERVE:
         case RELEASE:
         case REZERO_UNIT:
         case REASSIGN_BLOCKS:
         case SEEK_10:
-        case START_STOP:
                 scsicmd->result = DID_OK << 16 | COMMAND_COMPLETE << 8 | SAM_STAT_GOOD;
                 scsicmd->scsi_done(scsicmd);
                 return 0;
+
+        case START_STOP:
+                return aac_start_stop(scsicmd);
         }
 
         switch (scsicmd->cmnd[0])
diff --git a/drivers/scsi/aacraid/aacraid.h b/drivers/scsi/aacraid/aacraid.h
index a990e5b088cc..73916adb8f80 100644
--- a/drivers/scsi/aacraid/aacraid.h
+++ b/drivers/scsi/aacraid/aacraid.h
@@ -12,7 +12,7 @@
  *----------------------------------------------------------------------------*/
 
 #ifndef AAC_DRIVER_BUILD
-# define AAC_DRIVER_BUILD 2455
+# define AAC_DRIVER_BUILD 2456
 # define AAC_DRIVER_BRANCH "-ms"
 #endif
 #define MAXIMUM_NUM_CONTAINERS  32
@@ -424,6 +424,8 @@ struct aac_init
          */
         __le32  InitFlags;      /* flags for supported features */
 #define INITFLAGS_NEW_COMM_SUPPORTED    0x00000001
+#define INITFLAGS_DRIVER_USES_UTC_TIME  0x00000010
+#define INITFLAGS_DRIVER_SUPPORTS_PM    0x00000020
         __le32  MaxIoCommands;  /* max outstanding commands */
         __le32  MaxIoSize;      /* largest I/O command */
         __le32  MaxFibSize;     /* largest FIB to adapter */
@@ -867,8 +869,10 @@ struct aac_supplement_adapter_info
 };
 #define AAC_FEATURE_FALCON      cpu_to_le32(0x00000010)
 #define AAC_FEATURE_JBOD        cpu_to_le32(0x08000000)
-#define AAC_OPTION_MU_RESET     cpu_to_le32(0x00000001)
-#define AAC_OPTION_IGNORE_RESET cpu_to_le32(0x00000002)
+/* SupportedOptions2 */
+#define AAC_OPTION_MU_RESET             cpu_to_le32(0x00000001)
+#define AAC_OPTION_IGNORE_RESET         cpu_to_le32(0x00000002)
+#define AAC_OPTION_POWER_MANAGEMENT     cpu_to_le32(0x00000004)
 #define AAC_SIS_VERSION_V3      3
 #define AAC_SIS_SLOT_UNKNOWN    0xFF
 
@@ -1148,6 +1152,7 @@ struct aac_dev
 #define         ST_DQUOT        69
 #define         ST_STALE        70
 #define         ST_REMOTE       71
+#define         ST_NOT_READY    72
 #define         ST_BADHANDLE    10001
 #define         ST_NOT_SYNC     10002
 #define         ST_BAD_COOKIE   10003
@@ -1269,6 +1274,18 @@ struct aac_synchronize_reply {
         u8              data[16];
 };
 
+#define CT_POWER_MANAGEMENT     245
+#define CT_PM_START_UNIT        2
+#define CT_PM_STOP_UNIT         3
+#define CT_PM_UNIT_IMMEDIATE    1
+struct aac_power_management {
+        __le32          command;        /* VM_ContainerConfig */
+        __le32          type;           /* CT_POWER_MANAGEMENT */
+        __le32          sub;            /* CT_PM_* */
+        __le32          cid;
+        __le32          parm;           /* CT_PM_sub_* */
+};
+
 #define CT_PAUSE_IO    65
 #define CT_RELEASE_IO  66
 struct aac_pause {
@@ -1536,6 +1553,7 @@ struct aac_mntent {
 #define FSCS_NOTCLEAN   0x0001  /* fsck is necessary before mounting */
 #define FSCS_READONLY   0x0002  /* possible result of broken mirror */
 #define FSCS_HIDDEN     0x0004  /* should be ignored - set during a clear */
+#define FSCS_NOT_READY  0x0008  /* Array spinning up to fulfil request */
 
 struct aac_query_mount {
         __le32          command;
diff --git a/drivers/scsi/aacraid/comminit.c b/drivers/scsi/aacraid/comminit.c
index 294a802450be..cbac06355107 100644
--- a/drivers/scsi/aacraid/comminit.c
+++ b/drivers/scsi/aacraid/comminit.c
@@ -97,6 +97,8 @@ static int aac_alloc_comm(struct aac_dev *dev, void **commaddr, unsigned long co
                 init->InitFlags = cpu_to_le32(INITFLAGS_NEW_COMM_SUPPORTED);
                 dprintk((KERN_WARNING"aacraid: New Comm Interface enabled\n"));
         }
+        init->InitFlags |= cpu_to_le32(INITFLAGS_DRIVER_USES_UTC_TIME |
+                                       INITFLAGS_DRIVER_SUPPORTS_PM);
         init->MaxIoCommands = cpu_to_le32(dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB);
         init->MaxIoSize = cpu_to_le32(dev->scsi_host_ptr->max_sectors << 9);
         init->MaxFibSize = cpu_to_le32(dev->max_fib_size);
diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c
index c444527ae2fa..1f7c83607f84 100644
--- a/drivers/scsi/aacraid/linit.c
+++ b/drivers/scsi/aacraid/linit.c
@@ -811,6 +811,12 @@ static ssize_t aac_show_flags(struct device *cdev,
                                 "SAI_READ_CAPACITY_16\n");
         if (dev->jbod)
                 len += snprintf(buf + len, PAGE_SIZE - len, "SUPPORTED_JBOD\n");
+        if (dev->supplement_adapter_info.SupportedOptions2 &
+                AAC_OPTION_POWER_MANAGEMENT)
+                len += snprintf(buf + len, PAGE_SIZE - len,
+                                "SUPPORTED_POWER_MANAGEMENT\n");
+        if (dev->msi)
+                len += snprintf(buf + len, PAGE_SIZE - len, "PCI_HAS_MSI\n");
         return len;
 }