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Message-Id: <1183307483.4723.2.camel@dhcp-75-197.se.lsil.com>
Date: Sun, 01 Jul 2007 12:31:23 -0400
From: bo yang <bo.yang@....com>
To: James.Bottomley@...elEye.com, akpm@...l.org,
linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
neela.kolli@....com, bo.yang@....com, sumant.patro@....com
Subject: [PATCH 1/4] scsi: megaraid_sas -- add hibernation support
The megaraid_sas driver doesn't support the hibernation, the
suspend/resume routine implemented to support the hibernation.
Signed-off-by: Bo Yang <bo.yang@....com>
---
drivers/scsi/megaraid/megaraid_sas.c | 308 +++++++++++++++++++------
drivers/scsi/megaraid/megaraid_sas.h | 1
2 files changed, 239 insertions(+), 70 deletions(-)
diff -rupN linux-2.6.22_orig/drivers/scsi/megaraid/megaraid_sas.c
linux-2.6.22_new/drivers/scsi/megaraid/megaraid_sas.c
--- linux-2.6.22_orig/drivers/scsi/megaraid/megaraid_sas.c 2007-06-20
02:18:24.000000000 -0400
+++ linux-2.6.22_new/drivers/scsi/megaraid/megaraid_sas.c 2007-06-30
03:21:27.000000000 -0400
@@ -1804,6 +1804,81 @@ static void megasas_complete_cmd_dpc(uns
}
/**
+ * 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_DEBUG "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 megas
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 megas
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 megas
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 mega
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,
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 m
/**
* 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(
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 +2560,137 @@ static void megasas_shutdown_controller(
}
/**
+ * megasas_suspend - driver suspend entry point
+ * @pdev: PCI device structure
+ * @state:
+ */
+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);
+
+ scsi_host_put(host);
+
+ 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_INFO "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_DEBUG "megasas: Failed to register IRQ\n");
+ goto fail_irq;
+ }
+
+ instance->instancet->enable_intr(instance->reg_set);
+
+ /*
+ * Store instance in PCI softstate
+ */
+ pci_set_drvdata(pdev, instance);
+
+ /*
+ * 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 +2705,7 @@ static void megasas_detach_one(struct pc
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 +3144,8 @@ static struct pci_driver megasas_pci_dri
.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 -rupN linux-2.6.22_orig/drivers/scsi/megaraid/megaraid_sas.h
linux-2.6.22_new/drivers/scsi/megaraid/megaraid_sas.h
--- linux-2.6.22_orig/drivers/scsi/megaraid/megaraid_sas.h 2007-06-20
02:18:24.000000000 -0400
+++ linux-2.6.22_new/drivers/scsi/megaraid/megaraid_sas.h 2007-06-18
01:50:49.000000000 -0400
@@ -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
-
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