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Date: Fri, 12 Oct 2012 17:06:29 +0800
From: "NickCheng" <nick.cheng@...ca.com.tw>
To: <linux-scsi@...r.kernel.org>
Cc: <linux-kernel@...r.kernel.org>, <jejb@...nel.org>
Subject: [PATCH 2/5] arcmsr: Support Hibernation
From: Nick Cheng <nick.cheng@...ca.com.tw>
Support hibernation for whole series of RAID controllers
Signed-off-by: Nick Cheng <nick.cheng@...ca.com.tw>
---
diff -uprN a//drivers/scsi/arcmsr/arcmsr.h b//drivers/scsi/arcmsr/arcmsr.h
--- a//drivers/scsi/arcmsr/arcmsr.h 2012-10-12 16:28:42.175958900 +0800
+++ b//drivers/scsi/arcmsr/arcmsr.h 2012-10-12 16:29:10.215958628 +0800
@@ -63,7 +63,8 @@ struct device_attribute;
#define ARCMSR_DEFAULT_SG_ENTRIES 38
#define ARCMSR_MAX_HBB_POSTQUEUE 264
#define ARCMSR_MAX_XFER_LEN 0x26000
-#define ARCMSR_CDB_SG_PAGE_LENGTH 256
+#define ARCMSR_CDB_SG_PAGE_LENGTH 256
+#define ARCMST_NUM_MSIX_VECTORS 4
#ifndef PCI_DEVICE_ID_ARECA_1880
#define PCI_DEVICE_ID_ARECA_1880 0x1880
#endif
@@ -511,6 +512,7 @@ struct AdapterControlBlock
struct pci_dev *pdev;
struct Scsi_Host *host;
unsigned long vir2phy_offset;
+ struct msix_entry entries[ARCMST_NUM_MSIX_VECTORS];
/* Offset is used in making arc cdb physical to virtual calculations */
uint32_t outbound_int_enable;
uint32_t cdb_phyaddr_hi32;
@@ -547,6 +549,8 @@ struct AdapterControlBlock
/* iop init */
#define ACB_F_ABORT 0x0200
#define ACB_F_FIRMWARE_TRAP 0x0400
+ #define ACB_F_MSI_ENABLED 0x1000
+ #define ACB_F_MSIX_ENABLED 0x2000
struct CommandControlBlock *pccb_pool[ARCMSR_MAX_FREECCB_NUM];
/* used for memory free */
struct list_head ccb_free_list;
diff -uprN a//drivers/scsi/arcmsr/arcmsr_hba.c b//drivers/scsi/arcmsr/arcmsr_hba.c
--- a//drivers/scsi/arcmsr/arcmsr_hba.c 2012-10-12 16:28:42.175958900 +0800
+++ b//drivers/scsi/arcmsr/arcmsr_hba.c 2012-10-12 16:29:10.239958629 +0800
@@ -89,11 +89,18 @@ 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);
+#ifdef CONFIG_PM
+ static int arcmsr_suspend(struct pci_dev *pdev,
+ pm_message_t state);
+ static int arcmsr_resume(struct pci_dev *pdev);
+#endif
static void arcmsr_remove(struct pci_dev *pdev);
static void arcmsr_shutdown(struct pci_dev *pdev);
static void arcmsr_iop_init(struct AdapterControlBlock *acb);
static void arcmsr_free_ccb_pool(struct AdapterControlBlock *acb);
static u32 arcmsr_disable_outbound_ints(struct AdapterControlBlock *acb);
+static void arcmsr_enable_outbound_ints(struct AdapterControlBlock *acb,
+ u32 orig_mask);
static void arcmsr_stop_adapter_bgrb(struct AdapterControlBlock *acb);
static void arcmsr_hbaA_flush_cache(struct AdapterControlBlock *acb);
static void arcmsr_hbaB_flush_cache(struct AdapterControlBlock *acb);
@@ -166,6 +173,10 @@ static struct pci_driver arcmsr_pci_driv
.id_table = arcmsr_device_id_table,
.probe = arcmsr_probe,
.remove = arcmsr_remove,
+ #ifdef CONFIG_PM
+ .suspend = arcmsr_suspend,
+ .resume = arcmsr_resume,
+ #endif
.shutdown = arcmsr_shutdown,
};
/*
@@ -662,6 +673,134 @@ arcmsr_message_isr_bh_fn(struct work_str
}
}
+#ifdef CONFIG_PM
+ 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);
+ if (acb->acb_flags & ACB_F_MSI_ENABLED) {
+ free_irq(pdev->irq, acb);
+ pci_disable_msi(pdev);
+ } else if (acb->acb_flags & ACB_F_MSIX_ENABLED) {
+ for (i = 0; i < ARCMST_NUM_MSIX_VECTORS; i++) {
+ free_irq(acb->entries[i].vector, acb);
+ }
+ pci_disable_msix(pdev);
+ } else {
+ free_irq(pdev->irq, 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;
+ struct msix_entry entries[ARCMST_NUM_MSIX_VECTORS];
+ 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 (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
+ if (!pci_enable_msix(pdev, entries,
+ ARCMST_NUM_MSIX_VECTORS)) {
+ for (i = 0; i < ARCMST_NUM_MSIX_VECTORS;
+ i++) {
+ entries[i].entry = i;
+ if (request_irq(entries[i].vector,
+ arcmsr_do_interrupt, 0,
+ "arcmsr", acb)) {
+ for (j = 0 ; j < i ; j++)
+ free_irq(entries[i].vector,
+ acb);
+ goto controller_stop;
+ }
+ acb->entries[i] = entries[i];
+ }
+ acb->acb_flags |= ACB_F_MSIX_ENABLED;
+ } else {
+ printk("arcmsr%d: MSI-X"
+ "failed to enable\n", acb->host->host_no);
+ if (request_irq(pdev->irq,
+ arcmsr_do_interrupt, IRQF_SHARED,
+ "arcmsr", acb)) {
+ goto controller_stop;
+ }
+ }
+ } else if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
+ if (!pci_enable_msi(pdev)) {
+ acb->acb_flags |= ACB_F_MSI_ENABLED;
+ }
+ if (request_irq(pdev->irq, arcmsr_do_interrupt,
+ IRQF_SHARED, "arcmsr", acb)) {
+ goto controller_stop;
+ }
+ } else {
+ if (request_irq(pdev->irq, arcmsr_do_interrupt,
+ IRQF_SHARED, "arcmsr", acb)) {
+ goto controller_stop;
+ }
+ }
+ 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;
+ }
+#endif
+
static int arcmsr_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
struct Scsi_Host *host;
--
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