[PATCH 2/5] SCSI: Support Hibernation
From: NickCheng
Date: Wed Oct 03 2012 - 08:14:50 EST
From: Nick Cheng <nick.cheng@xxxxxxxxxxxx>
Support hibernation for whole series of RAID controllers
Signed-off-by: Nick Cheng< nick.cheng@xxxxxxxxxxxx >
---
diff -uprN -X linux-vanilla/Documentation/dontdiff
linux-vanilla//drivers/scsi/arcmsr/arcmsr_hba.c
linux-development//drivers/scsi/arcmsr/arcmsr_hba.c
--- linux-vanilla//drivers/scsi/arcmsr/arcmsr_hba.c 2012-10-03
19:08:33.338634210 +0800
+++ linux-development//drivers/scsi/arcmsr/arcmsr_hba.c 2012-10-03
18:50:32.694644708 +0800
@@ -42,7 +42,7 @@
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
****************************************************************************
***
** For history of changes, see Documentation/scsi/ChangeLog.arcmsr
-** Firmware Specification, see Documentation/scsi/arcmsr_spec.txt
+** Firmware Specification, see Documentation/scsi/arcmsr_spec.txt
****************************************************************************
***
*/
#include <linux/module.h>
@@ -90,6 +90,8 @@ static int arcmsr_bios_param(struct scsi
static int arcmsr_queue_command(struct Scsi_Host *h, struct scsi_cmnd
*cmd);
static int arcmsr_probe(struct pci_dev *pdev,
const struct pci_device_id *id);
+static int arcmsr_suspend(struct pci_dev *pdev, pm_message_t state);
+static int arcmsr_resume(struct pci_dev *pdev);
static void arcmsr_remove(struct pci_dev *pdev);
static void arcmsr_shutdown(struct pci_dev *pdev);
static void arcmsr_iop_init(struct AdapterControlBlock *acb);
@@ -167,6 +169,8 @@ static struct pci_driver arcmsr_pci_driv
.id_table = arcmsr_device_id_table,
.probe = arcmsr_probe,
.remove = arcmsr_remove,
+ .suspend = arcmsr_suspend,
+ .resume = arcmsr_resume,
.shutdown = arcmsr_shutdown,
};
/*
@@ -603,6 +607,80 @@ static void arcmsr_message_isr_bh_fn(str
}
}
+static int arcmsr_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+ int i;
+ uint32_t intmask_org;
+ struct Scsi_Host *host = pci_get_drvdata(pdev);
+ struct AdapterControlBlock *acb = (struct AdapterControlBlock
*)host->hostdata;
+
+ intmask_org = arcmsr_disable_outbound_ints(acb);
+ del_timer_sync(&acb->eternal_timer);
+ flush_scheduled_work();
+ arcmsr_stop_adapter_bgrb(acb);
+ arcmsr_flush_adapter_cache(acb);
+ arcmsr_enable_outbound_ints(acb, intmask_org);
+ pci_set_drvdata(pdev, host);
+ pci_save_state(pdev);
+ pci_disable_device(pdev);
+ pci_set_power_state(pdev, pci_choose_state(pdev, state));
+ return 0;
+}
+
+static int arcmsr_resume(struct pci_dev *pdev)
+{
+ int error, i, j;
+ struct Scsi_Host *host = pci_get_drvdata(pdev);
+ struct AdapterControlBlock *acb = (struct AdapterControlBlock
*)host->hostdata;
+
+ pci_set_power_state(pdev, PCI_D0);
+ pci_enable_wake(pdev, PCI_D0, 0);
+ pci_restore_state(pdev);
+ if (pci_enable_device(pdev)) {
+ printk("%s: pci_enable_device error \n", __func__);
+ return -ENODEV;
+ }
+ error = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
+ if (error) {
+ error = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
+ if (error) {
+ printk(KERN_WARNING
+ "scsi%d: No suitable DMA mask available\n",
+ host->host_no);
+ goto controller_unregister;
+ }
+ }
+ pci_set_master(pdev);
+ arcmsr_iop_init(acb);
+ if (request_irq(pdev->irq, arcmsr_do_interrupt, IRQF_SHARED,
"arcmsr", acb)) {
+ printk("arcmsr%d: request_irq =%d failed!\n",
acb->host->host_no, pdev->irq);
+ goto controller_stop;
+ }
+ timer_init:
+ INIT_WORK(&acb->arcmsr_do_message_isr_bh,
+ arcmsr_message_isr_bh_fn);
+ atomic_set(&acb->rq_map_token, 16);
+ atomic_set(&acb->ante_token_value, 16);
+ acb->fw_flag = FW_NORMAL;
+ init_timer(&acb->eternal_timer);
+ acb->eternal_timer.expires = jiffies + msecs_to_jiffies(6 *
HZ);
+ acb->eternal_timer.data = (unsigned long) acb;
+ acb->eternal_timer.function = &arcmsr_request_device_map;
+ add_timer(&acb->eternal_timer);
+ return 0;
+ controller_stop:
+ arcmsr_stop_adapter_bgrb(acb);
+ arcmsr_flush_adapter_cache(acb);
+ controller_unregister:
+ scsi_remove_host(host);
+ arcmsr_free_ccb_pool(acb);
+ arcmsr_unmap_pciregion(acb);
+ pci_release_regions(pdev);
+ scsi_host_put(host);
+ pci_disable_device(pdev);
+ return -ENODEV;
+}
+
static int arcmsr_probe(struct pci_dev *pdev, const struct pci_device_id
*id)
{
struct Scsi_Host *host;
@@ -1539,14 +1617,7 @@ static void arcmsr_hbaC_postqueue_isr(st
throttling++;
}
}
-/*
-***************************************************************************
*******
-** Handle a message interrupt
-**
-** The only message interrupt we expect is in response to a query for the
current adapter config.
-** We want this in order to compare the drivemap so that we can detect
newly-attached drives.
-***************************************************************************
*******
-*/
+
static void arcmsr_hbaA_message_isr(struct AdapterControlBlock *acb)
{
struct MessageUnit_A *reg = acb->pmuA;
@@ -1562,15 +1633,7 @@ static void arcmsr_hbaB_message_isr(stru
writel(ARCMSR_MESSAGE_INT_CLEAR_PATTERN, reg->iop2drv_doorbell);
schedule_work(&acb->arcmsr_do_message_isr_bh);
}
-/*
-***************************************************************************
*******
-** Handle a message interrupt
-**
-** The only message interrupt we expect is in response to a query for the
-** current adapter config.
-** We want this in order to compare the drivemap so that we can detect
newly-attached drives.
-***************************************************************************
*******
-*/
+
static void arcmsr_hbaC_message_isr(struct AdapterControlBlock *acb)
{
struct MessageUnit_C *reg = acb->pmuC;
--
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