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Date: Sun, 20 Sep 2009 20:45:27 -0600
From: "Yang, Bo" <Bo.Yang@....com>
To: "Yang, Bo" <Bo.Yang@....com>,
"linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
"akpm@...l.org" <akpm@...l.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"James.Bottomley@...senPartnership.com"
<James.Bottomley@...senPartnership.com>,
"James.Bottomley@...e.de" <James.Bottomley@...e.de>
Subject: [PATCH 10/12] scsi: megaraid_sas - Add the support for updating the
OS after adding/removing the devices form FW.
Driver will update the OS devices after adding and deleting the device from FW. When driver receive add or delete AEN from FW, driver will send the DCMD cmd to get the System PD list from FW. Then driver will check if this device already in the OS: If add event and OS don't have the device (but it is in the list), driver add the device to OS, otherwise driver will not add. If remove event, driver will check the list, if is not in the list, but OS have the device, driver will remove the device.
Signed-off-by Bo Yang<bo.yang@....com>
---
drivers/scsi/megaraid/megaraid_sas.c | 125 ++++++++++++++++++++++++++++++++++-
drivers/scsi/megaraid/megaraid_sas.h | 17 ++++
2 files changed, 141 insertions(+), 1 deletion(-)
diff -rupN linux-2.6.28_orig/drivers/scsi/megaraid/megaraid_sas.c linux-2.6.28_new/drivers/scsi/megaraid/megaraid_sas.c
--- linux-2.6.28_orig/drivers/scsi/megaraid/megaraid_sas.c 2009-09-15 03:45:14.000000000 -0400
+++ linux-2.6.28_new/drivers/scsi/megaraid/megaraid_sas.c 2009-09-15 04:18:58.000000000 -0400
@@ -1520,6 +1520,8 @@ megasas_bios_param(struct scsi_device *s
return 0;
}
+static void megasas_aen_polling(struct work_struct *work);
+
/**
* megasas_service_aen - Processes an event notification
* @instance: Adapter soft state
@@ -1551,6 +1553,20 @@ megasas_service_aen(struct megasas_insta
instance->aen_cmd = NULL;
megasas_return_cmd(instance, cmd);
+
+ if (instance->unload == 0) {
+ struct megasas_aen_event *ev;
+ ev = kzalloc(sizeof(*ev), GFP_ATOMIC);
+ if (!ev) {
+ printk(KERN_ERR "megasas_service_aen: out of memory\n");
+ } else {
+ ev->instance = instance;
+ instance->ev = ev;
+ INIT_WORK(&ev->hotplug_work, megasas_aen_polling);
+ schedule_delayed_work(
+ (struct delayed_work *)&ev->hotplug_work, 0);
+ }
+ }
}
/*
@@ -2075,6 +2091,7 @@ static int megasas_create_frame_pool(str
}
cmd->frame->io.context = cmd->index;
+ cmd->frame->io.pad_0 = 0;
}
return 0;
@@ -2271,7 +2288,6 @@ megasas_get_pd_list(struct megasas_insta
return ret;
}
-
/**
* megasas_get_controller_info - Returns FW's controller structure
* @instance: Adapter soft state
@@ -2986,6 +3002,7 @@ megasas_probe_one(struct pci_dev *pdev,
*instance->consumer = 0;
megasas_poll_wait_aen = 0;
instance->flag_ieee = 0;
+ instance->ev = NULL;
instance->evt_detail = pci_alloc_consistent(pdev,
sizeof(struct
@@ -3209,6 +3226,16 @@ megasas_suspend(struct pci_dev *pdev, pm
megasas_flush_cache(instance);
megasas_shutdown_controller(instance, MR_DCMD_HIBERNATE_SHUTDOWN);
+
+ /* cancel the delayed work if this work still in queue */
+ if (instance->ev != NULL) {
+ struct megasas_aen_event *ev = instance->ev;
+ cancel_delayed_work(
+ (struct delayed_work *)&ev->hotplug_work);
+ flush_scheduled_work();
+ instance->ev = NULL;
+ }
+
tasklet_kill(&instance->isr_tasklet);
pci_set_drvdata(instance->pdev, instance);
@@ -3349,6 +3376,16 @@ static void __devexit megasas_detach_one
scsi_remove_host(instance->host);
megasas_flush_cache(instance);
megasas_shutdown_controller(instance, MR_DCMD_CTRL_SHUTDOWN);
+
+ /* cancel the delayed work if this work still in queue*/
+ if (instance->ev != NULL) {
+ struct megasas_aen_event *ev = instance->ev;
+ cancel_delayed_work(
+ (struct delayed_work *)&ev->hotplug_work);
+ flush_scheduled_work();
+ instance->ev = NULL;
+ }
+
tasklet_kill(&instance->isr_tasklet);
/*
@@ -3913,6 +3950,92 @@ out:
return retval;
}
+static void
+megasas_aen_polling(struct work_struct *work)
+{
+ struct megasas_aen_event *ev =
+ container_of(work, struct megasas_aen_event, hotplug_work);
+ struct megasas_instance *instance = ev->instance;
+ union megasas_evt_class_locale class_locale;
+ struct Scsi_Host *host;
+ struct scsi_device *sdev1;
+ u16 pd_index = 0;
+ int i, j, doscan = 0;
+ u32 seq_num;
+ int error;
+
+ if (!instance) {
+ printk(KERN_ERR "invalid instance!\n");
+ kfree(ev);
+ return;
+ }
+ instance->ev = NULL;
+ host = instance->host;
+ if (instance->evt_detail) {
+
+ switch (instance->evt_detail->code) {
+ case MR_EVT_PD_INSERTED:
+ case MR_EVT_PD_REMOVED:
+ case MR_EVT_CTRL_HOST_BUS_SCAN_REQUESTED:
+ doscan = 1;
+ break;
+ default:
+ doscan = 0;
+ break;
+ }
+ } else {
+ printk(KERN_ERR "invalid evt_detail!\n");
+ kfree(ev);
+ return;
+ }
+
+ if (doscan) {
+ printk(KERN_INFO "scanning ...\n");
+ megasas_get_pd_list(instance);
+ for (i = 0; i < MEGASAS_MAX_PD_CHANNELS; i++) {
+ for (j = 0; j < MEGASAS_MAX_DEV_PER_CHANNEL; j++) {
+ pd_index = i*MEGASAS_MAX_DEV_PER_CHANNEL + j;
+ sdev1 = scsi_device_lookup(host, i, j, 0);
+ if (instance->pd_list[pd_index].driveState ==
+ MR_PD_STATE_SYSTEM) {
+ if (!sdev1) {
+ scsi_add_device(host, i, j, 0);
+ }
+ if (sdev1)
+ scsi_device_put(sdev1);
+ } else {
+ if (sdev1) {
+ scsi_remove_device(sdev1);
+ scsi_device_put(sdev1);
+ }
+ }
+ }
+ }
+ }
+
+ if ( instance->aen_cmd != NULL ) {
+ kfree(ev);
+ return ;
+ }
+
+ seq_num = instance->evt_detail->seq_num + 1;
+
+ /* Register AEN with FW for latest sequence number plus 1 */
+ class_locale.members.reserved = 0;
+ class_locale.members.locale = MR_EVT_LOCALE_ALL;
+ class_locale.members.class = MR_EVT_CLASS_DEBUG;
+ mutex_lock(&instance->aen_mutex);
+ error = megasas_register_aen(instance, seq_num,
+ class_locale.word);
+ mutex_unlock(&instance->aen_mutex);
+
+ if (error)
+ printk(KERN_ERR "register aen failed error %x\n", error);
+
+ kfree(ev);
+}
+
+
static DRIVER_ATTR(poll_mode_io, S_IRUGO|S_IWUGO,
megasas_sysfs_show_poll_mode_io,
megasas_sysfs_set_poll_mode_io);
diff -rupN linux-2.6.28_orig/drivers/scsi/megaraid/megaraid_sas.h linux-2.6.28_new/drivers/scsi/megaraid/megaraid_sas.h
--- linux-2.6.28_orig/drivers/scsi/megaraid/megaraid_sas.h 2009-09-15 03:45:14.000000000 -0400
+++ linux-2.6.28_new/drivers/scsi/megaraid/megaraid_sas.h 2009-09-15 04:23:57.000000000 -0400
@@ -285,6 +285,17 @@ enum MR_PD_QUERY_TYPE {
MR_PD_QUERY_TYPE_EXPOSED_TO_HOST = 5,
};
+#define MR_EVT_CFG_CLEARED 0x0004
+#define MR_EVT_LD_STATE_CHANGE 0x0051
+#define MR_EVT_PD_INSERTED 0x005b
+#define MR_EVT_PD_REMOVED 0x0070
+#define MR_EVT_LD_CREATED 0x008a
+#define MR_EVT_LD_DELETED 0x008b
+#define MR_EVT_FOREIGN_CFG_IMPORTED 0x00db
+#define MR_EVT_LD_OFFLINE 0x00fc
+#define MR_EVT_CTRL_HOST_BUS_SCAN_REQUESTED 0x0152
+#define MAX_LOGICAL_DRIVES 64
+
enum MR_PD_STATE {
MR_PD_STATE_UNCONFIGURED_GOOD = 0x00,
MR_PD_STATE_UNCONFIGURED_BAD = 0x01,
@@ -1157,6 +1168,11 @@ struct megasas_evt_detail {
} __attribute__ ((packed));
+struct megasas_aen_event {
+ struct work_struct hotplug_work;
+ struct megasas_instance *instance;
+};
+
struct megasas_instance {
u32 *producer;
@@ -1176,6 +1192,7 @@ struct megasas_instance {
u16 max_num_sge;
u16 max_fw_cmds;
u32 max_sectors_per_req;
+ struct megasas_aen_event *ev;
struct megasas_cmd **cmd_list;
struct list_head cmd_pool;
--
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