[SCSI] megaraid_sas: add hibernation support

Adding hibernation support. suspend, resume routine implemented.

Signed-off-by: Bo Yang <bo.yang@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

2 files changed, 233 insertions, 70 deletions

diff --git a/drivers/scsi/megaraid/megaraid_sas.c b/drivers/scsi/megaraid/megaraid_sas.c
index 3ad379fcd18f..9aee2544798c 100644
--- a/drivers/scsi/megaraid/megaraid_sas.c
+++ b/drivers/scsi/megaraid/megaraid_sas.c
@@ -1804,6 +1804,81 @@ static void megasas_complete_cmd_dpc(unsigned long instance_addr)
 }
 
 /**
+ * megasas_issue_init_mfi -     Initializes the FW
+ * @instance:           Adapter soft state
+ *
+ * Issues the INIT MFI cmd
+ */
+static int
+megasas_issue_init_mfi(struct megasas_instance *instance)
+{
+        u32 context;
+
+        struct megasas_cmd *cmd;
+
+        struct megasas_init_frame *init_frame;
+        struct megasas_init_queue_info *initq_info;
+        dma_addr_t init_frame_h;
+        dma_addr_t initq_info_h;
+
+        /*
+         * Prepare a init frame. Note the init frame points to queue info
+         * structure. Each frame has SGL allocated after first 64 bytes. For
+         * this frame - since we don't need any SGL - we use SGL's space as
+         * queue info structure
+         *
+         * We will not get a NULL command below. We just created the pool.
+         */
+        cmd = megasas_get_cmd(instance);
+
+        init_frame = (struct megasas_init_frame *)cmd->frame;
+        initq_info = (struct megasas_init_queue_info *)
+                ((unsigned long)init_frame + 64);
+
+        init_frame_h = cmd->frame_phys_addr;
+        initq_info_h = init_frame_h + 64;
+
+        context = init_frame->context;
+        memset(init_frame, 0, MEGAMFI_FRAME_SIZE);
+        memset(initq_info, 0, sizeof(struct megasas_init_queue_info));
+        init_frame->context = context;
+
+        initq_info->reply_queue_entries = instance->max_fw_cmds + 1;
+        initq_info->reply_queue_start_phys_addr_lo = instance->reply_queue_h;
+
+        initq_info->producer_index_phys_addr_lo = instance->producer_h;
+        initq_info->consumer_index_phys_addr_lo = instance->consumer_h;
+
+        init_frame->cmd = MFI_CMD_INIT;
+        init_frame->cmd_status = 0xFF;
+        init_frame->queue_info_new_phys_addr_lo = initq_info_h;
+
+        init_frame->data_xfer_len = sizeof(struct megasas_init_queue_info);
+
+        /*
+         * disable the intr before firing the init frame to FW
+         */
+        instance->instancet->disable_intr(instance->reg_set);
+
+        /*
+         * Issue the init frame in polled mode
+         */
+
+        if (megasas_issue_polled(instance, cmd)) {
+                printk(KERN_ERR "megasas: Failed to init firmware\n");
+                megasas_return_cmd(instance, cmd);
+                goto fail_fw_init;
+        }
+
+        megasas_return_cmd(instance, cmd);
+
+        return 0;
+
+fail_fw_init:
+        return -EINVAL;
+}
+
+/**
  * megasas_init_mfi -   Initializes the FW
  * @instance:           Adapter soft state
  *
@@ -1816,15 +1891,7 @@ static int megasas_init_mfi(struct megasas_instance *instance)
         u32 max_sectors_1;
         u32 max_sectors_2;
         struct megasas_register_set __iomem *reg_set;
-
-        struct megasas_cmd *cmd;
         struct megasas_ctrl_info *ctrl_info;
-
-        struct megasas_init_frame *init_frame;
-        struct megasas_init_queue_info *initq_info;
-        dma_addr_t init_frame_h;
-        dma_addr_t initq_info_h;
-
         /*
          * Map the message registers
          */
@@ -1901,52 +1968,8 @@ static int megasas_init_mfi(struct megasas_instance *instance)
                 goto fail_reply_queue;
         }
 
-        /*
-         * Prepare a init frame. Note the init frame points to queue info
-         * structure. Each frame has SGL allocated after first 64 bytes. For
-         * this frame - since we don't need any SGL - we use SGL's space as
-         * queue info structure
-         *
-         * We will not get a NULL command below. We just created the pool.
-         */
-        cmd = megasas_get_cmd(instance);
-
-        init_frame = (struct megasas_init_frame *)cmd->frame;
-        initq_info = (struct megasas_init_queue_info *)
-            ((unsigned long)init_frame + 64);
-
-        init_frame_h = cmd->frame_phys_addr;
-        initq_info_h = init_frame_h + 64;
-
-        memset(init_frame, 0, MEGAMFI_FRAME_SIZE);
-        memset(initq_info, 0, sizeof(struct megasas_init_queue_info));
-
-        initq_info->reply_queue_entries = instance->max_fw_cmds + 1;
-        initq_info->reply_queue_start_phys_addr_lo = instance->reply_queue_h;
-
-        initq_info->producer_index_phys_addr_lo = instance->producer_h;
-        initq_info->consumer_index_phys_addr_lo = instance->consumer_h;
-
-        init_frame->cmd = MFI_CMD_INIT;
-        init_frame->cmd_status = 0xFF;
-        init_frame->queue_info_new_phys_addr_lo = initq_info_h;
-
-        init_frame->data_xfer_len = sizeof(struct megasas_init_queue_info);
-
-        /*
-         * disable the intr before firing the init frame to FW
-         */
-        instance->instancet->disable_intr(instance->reg_set);
-
-        /*
-         * Issue the init frame in polled mode
-         */
-        if (megasas_issue_polled(instance, cmd)) {
-                printk(KERN_DEBUG "megasas: Failed to init firmware\n");
+        if (megasas_issue_init_mfi(instance))
                 goto fail_fw_init;
-        }
-
-        megasas_return_cmd(instance, cmd);
 
         ctrl_info = kmalloc(sizeof(struct megasas_ctrl_info), GFP_KERNEL);
 
@@ -1982,7 +2005,6 @@ static int megasas_init_mfi(struct megasas_instance *instance)
         return 0;
 
       fail_fw_init:
-        megasas_return_cmd(instance, cmd);
 
         pci_free_consistent(instance->pdev, reply_q_sz,
                             instance->reply_queue, instance->reply_queue_h);
@@ -2264,6 +2286,28 @@ static int megasas_io_attach(struct megasas_instance *instance)
         return 0;
 }
 
+static int
+megasas_set_dma_mask(struct pci_dev *pdev)
+{
+        /*
+         * All our contollers are capable of performing 64-bit DMA
+         */
+        if (IS_DMA64) {
+                if (pci_set_dma_mask(pdev, DMA_64BIT_MASK) != 0) {
+
+                        if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) != 0)
+                                goto fail_set_dma_mask;
+                }
+        } else {
+                if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) != 0)
+                        goto fail_set_dma_mask;
+        }
+        return 0;
+
+fail_set_dma_mask:
+        return 1;
+}
+
 /**
  * megasas_probe_one -  PCI hotplug entry point
  * @pdev:               PCI device structure
@@ -2297,19 +2341,8 @@ megasas_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
 
         pci_set_master(pdev);
 
-        /*
-         * All our contollers are capable of performing 64-bit DMA
-         */
-        if (IS_DMA64) {
-                if (pci_set_dma_mask(pdev, DMA_64BIT_MASK) != 0) {
-
-                        if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) != 0)
-                                goto fail_set_dma_mask;
-                }
-        } else {
-                if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) != 0)
-                        goto fail_set_dma_mask;
-        }
+        if (megasas_set_dma_mask(pdev))
+                goto fail_set_dma_mask;
 
         host = scsi_host_alloc(&megasas_template,
                                sizeof(struct megasas_instance));
@@ -2491,8 +2524,10 @@ static void megasas_flush_cache(struct megasas_instance *instance)
 /**
  * megasas_shutdown_controller -        Instructs FW to shutdown the controller
  * @instance:                           Adapter soft state
+ * @opcode:                             Shutdown/Hibernate
  */
-static void megasas_shutdown_controller(struct megasas_instance *instance)
+static void megasas_shutdown_controller(struct megasas_instance *instance,
+                                        u32 opcode)
 {
         struct megasas_cmd *cmd;
         struct megasas_dcmd_frame *dcmd;
@@ -2515,7 +2550,7 @@ static void megasas_shutdown_controller(struct megasas_instance *instance)
         dcmd->flags = MFI_FRAME_DIR_NONE;
         dcmd->timeout = 0;
         dcmd->data_xfer_len = 0;
-        dcmd->opcode = MR_DCMD_CTRL_SHUTDOWN;
+        dcmd->opcode = opcode;
 
         megasas_issue_blocked_cmd(instance, cmd);
 
@@ -2525,6 +2560,131 @@ static void megasas_shutdown_controller(struct megasas_instance *instance)
 }
 
 /**
+ * megasas_suspend -    driver suspend entry point
+ * @pdev:               PCI device structure
+ * @state:              PCI power state to suspend routine
+ */
+static int __devinit
+megasas_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+        struct Scsi_Host *host;
+        struct megasas_instance *instance;
+
+        instance = pci_get_drvdata(pdev);
+        host = instance->host;
+
+        megasas_flush_cache(instance);
+        megasas_shutdown_controller(instance, MR_DCMD_HIBERNATE_SHUTDOWN);
+        tasklet_kill(&instance->isr_tasklet);
+
+        pci_set_drvdata(instance->pdev, instance);
+        instance->instancet->disable_intr(instance->reg_set);
+        free_irq(instance->pdev->irq, instance);
+
+        pci_save_state(pdev);
+        pci_disable_device(pdev);
+
+        pci_set_power_state(pdev, pci_choose_state(pdev, state));
+
+        return 0;
+}
+
+/**
+ * megasas_resume-      driver resume entry point
+ * @pdev:               PCI device structure
+ */
+static int __devinit
+megasas_resume(struct pci_dev *pdev)
+{
+        int rval;
+        struct Scsi_Host *host;
+        struct megasas_instance *instance;
+
+        instance = pci_get_drvdata(pdev);
+        host = instance->host;
+        pci_set_power_state(pdev, PCI_D0);
+        pci_enable_wake(pdev, PCI_D0, 0);
+        pci_restore_state(pdev);
+
+        /*
+         * PCI prepping: enable device set bus mastering and dma mask
+         */
+        rval = pci_enable_device(pdev);
+
+        if (rval) {
+                printk(KERN_ERR "megasas: Enable device failed\n");
+                return rval;
+        }
+
+        pci_set_master(pdev);
+
+        if (megasas_set_dma_mask(pdev))
+                goto fail_set_dma_mask;
+
+        /*
+         * Initialize MFI Firmware
+         */
+
+        *instance->producer = 0;
+        *instance->consumer = 0;
+
+        atomic_set(&instance->fw_outstanding, 0);
+
+        /*
+         * We expect the FW state to be READY
+         */
+        if (megasas_transition_to_ready(instance))
+                goto fail_ready_state;
+
+        if (megasas_issue_init_mfi(instance))
+                goto fail_init_mfi;
+
+        tasklet_init(&instance->isr_tasklet, megasas_complete_cmd_dpc,
+                        (unsigned long)instance);
+
+        /*
+         * Register IRQ
+         */
+        if (request_irq(pdev->irq, megasas_isr, IRQF_SHARED,
+                "megasas", instance)) {
+                printk(KERN_ERR "megasas: Failed to register IRQ\n");
+                goto fail_irq;
+        }
+
+        instance->instancet->enable_intr(instance->reg_set);
+
+        /*
+         * Initiate AEN (Asynchronous Event Notification)
+         */
+        if (megasas_start_aen(instance))
+                printk(KERN_ERR "megasas: Start AEN failed\n");
+
+        return 0;
+
+fail_irq:
+fail_init_mfi:
+        if (instance->evt_detail)
+                pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
+                                instance->evt_detail,
+                                instance->evt_detail_h);
+
+        if (instance->producer)
+                pci_free_consistent(pdev, sizeof(u32), instance->producer,
+                                instance->producer_h);
+        if (instance->consumer)
+                pci_free_consistent(pdev, sizeof(u32), instance->consumer,
+                                instance->consumer_h);
+        scsi_host_put(host);
+
+fail_set_dma_mask:
+fail_ready_state:
+
+        pci_disable_device(pdev);
+
+        return -ENODEV;
+}
+
+/**
  * megasas_detach_one - PCI hot"un"plug entry point
  * @pdev:               PCI device structure
  */
@@ -2539,7 +2699,7 @@ static void megasas_detach_one(struct pci_dev *pdev)
 
         scsi_remove_host(instance->host);
         megasas_flush_cache(instance);
-        megasas_shutdown_controller(instance);
+        megasas_shutdown_controller(instance, MR_DCMD_CTRL_SHUTDOWN);
         tasklet_kill(&instance->isr_tasklet);
 
         /*
@@ -2978,6 +3138,8 @@ static struct pci_driver megasas_pci_driver = {
         .id_table = megasas_pci_table,
         .probe = megasas_probe_one,
         .remove = __devexit_p(megasas_detach_one),
+        .suspend = megasas_suspend,
+        .resume = megasas_resume,
         .shutdown = megasas_shutdown,
 };
 
diff --git a/drivers/scsi/megaraid/megaraid_sas.h b/drivers/scsi/megaraid/megaraid_sas.h
index 08c74c991781..f4ab30094621 100644
--- a/drivers/scsi/megaraid/megaraid_sas.h
+++ b/drivers/scsi/megaraid/megaraid_sas.h
@@ -117,6 +117,7 @@
 #define MR_FLUSH_DISK_CACHE                     0x02
 
 #define MR_DCMD_CTRL_SHUTDOWN                   0x01050000
+#define MR_DCMD_HIBERNATE_SHUTDOWN              0x01060000
 #define MR_ENABLE_DRIVE_SPINDOWN                0x01
 
 #define MR_DCMD_CTRL_EVENT_GET_INFO             0x01040100