* [Patch 1/7] megaraid_sas FW transition and q size changes
@ 2006-09-21 1:22 Sumant Patro
0 siblings, 0 replies; only message in thread
From: Sumant Patro @ 2006-09-21 1:22 UTC (permalink / raw)
To: James.Bottomley, linux-scsi; +Cc: akpm, hch, linux-kernel
[-- Attachment #1: Type: text/plain, Size: 4712 bytes --]
This patch has the following enhancements :
- handles new transition states of FW to support controller hotplug.
- It reduces by 1 the maximum cmds that the driver may send to FW.
- Sends "Stop Processing" cmd to FW before returning failure from reset routine
- Adds print in megasas_transition routine
- Sends "RESET" flag to FW to do a soft reset of controller
to move from Operational to Ready state,
This patch has been generated on latest scsi-misc git.
Signed-off-by: Sumant Patro <Sumant.Patro@lsil.com>
diff -uprN linux-2.6orig/drivers/scsi/megaraid/megaraid_sas.c linux-2.6new/drivers/scsi/megaraid/megaraid_sas.c
--- linux-2.6orig/drivers/scsi/megaraid/megaraid_sas.c 2006-09-20 10:20:40.000000000 -0700
+++ linux-2.6new/drivers/scsi/megaraid/megaraid_sas.c 2006-09-20 10:26:56.000000000 -0700
@@ -832,6 +832,12 @@ static int megasas_wait_for_outstanding(
}
if (atomic_read(&instance->fw_outstanding)) {
+ /*
+ * Send signal to FW to stop processing any pending cmds.
+ * The controller will be taken offline by the OS now.
+ */
+ writel(MFI_STOP_ADP,
+ &instance->reg_set->inbound_doorbell);
instance->hw_crit_error = 1;
return FAILED;
}
@@ -1229,10 +1235,12 @@ megasas_transition_to_ready(struct megas
fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) & MFI_STATE_MASK;
+ if (fw_state != MFI_STATE_READY)
+ printk(KERN_INFO "megasas: Waiting for FW to come to ready"
+ " state\n");
+
while (fw_state != MFI_STATE_READY) {
- printk(KERN_INFO "megasas: Waiting for FW to come to ready"
- " state\n");
switch (fw_state) {
case MFI_STATE_FAULT:
@@ -1244,19 +1252,27 @@ megasas_transition_to_ready(struct megas
/*
* Set the CLR bit in inbound doorbell
*/
- writel(MFI_INIT_CLEAR_HANDSHAKE,
+ writel(MFI_INIT_CLEAR_HANDSHAKE|MFI_INIT_HOTPLUG,
&instance->reg_set->inbound_doorbell);
max_wait = 2;
cur_state = MFI_STATE_WAIT_HANDSHAKE;
break;
+ case MFI_STATE_BOOT_MESSAGE_PENDING:
+ writel(MFI_INIT_HOTPLUG,
+ &instance->reg_set->inbound_doorbell);
+
+ max_wait = 10;
+ cur_state = MFI_STATE_BOOT_MESSAGE_PENDING;
+ break;
+
case MFI_STATE_OPERATIONAL:
/*
- * Bring it to READY state; assuming max wait 2 secs
+ * Bring it to READY state; assuming max wait 10 secs
*/
megasas_disable_intr(instance);
- writel(MFI_INIT_READY, &instance->reg_set->inbound_doorbell);
+ writel(MFI_RESET_FLAGS, &instance->reg_set->inbound_doorbell);
max_wait = 10;
cur_state = MFI_STATE_OPERATIONAL;
@@ -1323,6 +1339,7 @@ megasas_transition_to_ready(struct megas
return -ENODEV;
}
};
+ printk(KERN_INFO "megasas: FW now in Ready state\n");
return 0;
}
@@ -1690,6 +1707,12 @@ static int megasas_init_mfi(struct megas
* Get various operational parameters from status register
*/
instance->max_fw_cmds = instance->instancet->read_fw_status_reg(reg_set) & 0x00FFFF;
+ /*
+ * Reduce the max supported cmds by 1. This is to ensure that the
+ * reply_q_sz (1 more than the max cmd that driver may send)
+ * does not exceed max cmds that the FW can support
+ */
+ instance->max_fw_cmds = instance->max_fw_cmds-1;
instance->max_num_sge = (instance->instancet->read_fw_status_reg(reg_set) & 0xFF0000) >>
0x10;
/*
diff -uprN linux-2.6orig/drivers/scsi/megaraid/megaraid_sas.h linux-2.6new/drivers/scsi/megaraid/megaraid_sas.h
--- linux-2.6orig/drivers/scsi/megaraid/megaraid_sas.h 2006-09-20 10:20:40.000000000 -0700
+++ linux-2.6new/drivers/scsi/megaraid/megaraid_sas.h 2006-09-20 10:33:31.000000000 -0700
@@ -50,6 +50,7 @@
#define MFI_STATE_WAIT_HANDSHAKE 0x60000000
#define MFI_STATE_FW_INIT_2 0x70000000
#define MFI_STATE_DEVICE_SCAN 0x80000000
+#define MFI_STATE_BOOT_MESSAGE_PENDING 0x90000000
#define MFI_STATE_FLUSH_CACHE 0xA0000000
#define MFI_STATE_READY 0xB0000000
#define MFI_STATE_OPERATIONAL 0xC0000000
@@ -64,12 +65,18 @@
* READY : Move from OPERATIONAL to READY state; discard queue info
* MFIMODE : Discard (possible) low MFA posted in 64-bit mode (??)
* CLR_HANDSHAKE: FW is waiting for HANDSHAKE from BIOS or Driver
+ * HOTPLUG : Resume from Hotplug
+ * MFI_STOP_ADP : Send signal to FW to stop processing
*/
-#define MFI_INIT_ABORT 0x00000000
+#define MFI_INIT_ABORT 0x00000001
#define MFI_INIT_READY 0x00000002
#define MFI_INIT_MFIMODE 0x00000004
#define MFI_INIT_CLEAR_HANDSHAKE 0x00000008
-#define MFI_RESET_FLAGS MFI_INIT_READY|MFI_INIT_MFIMODE
+#define MFI_INIT_HOTPLUG 0x00000010
+#define MFI_STOP_ADP 0x00000020
+#define MFI_RESET_FLAGS MFI_INIT_READY| \
+ MFI_INIT_MFIMODE| \
+ MFI_INIT_ABORT
/**
* MFI frame flags
[-- Attachment #2: fw_changes-p1.patch --]
[-- Type: text/x-patch, Size: 4181 bytes --]
diff -uprN linux-2.6orig/drivers/scsi/megaraid/megaraid_sas.c linux-2.6new/drivers/scsi/megaraid/megaraid_sas.c
--- linux-2.6orig/drivers/scsi/megaraid/megaraid_sas.c 2006-09-20 10:20:40.000000000 -0700
+++ linux-2.6new/drivers/scsi/megaraid/megaraid_sas.c 2006-09-20 10:26:56.000000000 -0700
@@ -832,6 +832,12 @@ static int megasas_wait_for_outstanding(
}
if (atomic_read(&instance->fw_outstanding)) {
+ /*
+ * Send signal to FW to stop processing any pending cmds.
+ * The controller will be taken offline by the OS now.
+ */
+ writel(MFI_STOP_ADP,
+ &instance->reg_set->inbound_doorbell);
instance->hw_crit_error = 1;
return FAILED;
}
@@ -1229,10 +1235,12 @@ megasas_transition_to_ready(struct megas
fw_state = instance->instancet->read_fw_status_reg(instance->reg_set) & MFI_STATE_MASK;
+ if (fw_state != MFI_STATE_READY)
+ printk(KERN_INFO "megasas: Waiting for FW to come to ready"
+ " state\n");
+
while (fw_state != MFI_STATE_READY) {
- printk(KERN_INFO "megasas: Waiting for FW to come to ready"
- " state\n");
switch (fw_state) {
case MFI_STATE_FAULT:
@@ -1244,19 +1252,27 @@ megasas_transition_to_ready(struct megas
/*
* Set the CLR bit in inbound doorbell
*/
- writel(MFI_INIT_CLEAR_HANDSHAKE,
+ writel(MFI_INIT_CLEAR_HANDSHAKE|MFI_INIT_HOTPLUG,
&instance->reg_set->inbound_doorbell);
max_wait = 2;
cur_state = MFI_STATE_WAIT_HANDSHAKE;
break;
+ case MFI_STATE_BOOT_MESSAGE_PENDING:
+ writel(MFI_INIT_HOTPLUG,
+ &instance->reg_set->inbound_doorbell);
+
+ max_wait = 10;
+ cur_state = MFI_STATE_BOOT_MESSAGE_PENDING;
+ break;
+
case MFI_STATE_OPERATIONAL:
/*
- * Bring it to READY state; assuming max wait 2 secs
+ * Bring it to READY state; assuming max wait 10 secs
*/
megasas_disable_intr(instance);
- writel(MFI_INIT_READY, &instance->reg_set->inbound_doorbell);
+ writel(MFI_RESET_FLAGS, &instance->reg_set->inbound_doorbell);
max_wait = 10;
cur_state = MFI_STATE_OPERATIONAL;
@@ -1323,6 +1339,7 @@ megasas_transition_to_ready(struct megas
return -ENODEV;
}
};
+ printk(KERN_INFO "megasas: FW now in Ready state\n");
return 0;
}
@@ -1690,6 +1707,12 @@ static int megasas_init_mfi(struct megas
* Get various operational parameters from status register
*/
instance->max_fw_cmds = instance->instancet->read_fw_status_reg(reg_set) & 0x00FFFF;
+ /*
+ * Reduce the max supported cmds by 1. This is to ensure that the
+ * reply_q_sz (1 more than the max cmd that driver may send)
+ * does not exceed max cmds that the FW can support
+ */
+ instance->max_fw_cmds = instance->max_fw_cmds-1;
instance->max_num_sge = (instance->instancet->read_fw_status_reg(reg_set) & 0xFF0000) >>
0x10;
/*
diff -uprN linux-2.6orig/drivers/scsi/megaraid/megaraid_sas.h linux-2.6new/drivers/scsi/megaraid/megaraid_sas.h
--- linux-2.6orig/drivers/scsi/megaraid/megaraid_sas.h 2006-09-20 10:20:40.000000000 -0700
+++ linux-2.6new/drivers/scsi/megaraid/megaraid_sas.h 2006-09-20 10:33:31.000000000 -0700
@@ -50,6 +50,7 @@
#define MFI_STATE_WAIT_HANDSHAKE 0x60000000
#define MFI_STATE_FW_INIT_2 0x70000000
#define MFI_STATE_DEVICE_SCAN 0x80000000
+#define MFI_STATE_BOOT_MESSAGE_PENDING 0x90000000
#define MFI_STATE_FLUSH_CACHE 0xA0000000
#define MFI_STATE_READY 0xB0000000
#define MFI_STATE_OPERATIONAL 0xC0000000
@@ -64,12 +65,18 @@
* READY : Move from OPERATIONAL to READY state; discard queue info
* MFIMODE : Discard (possible) low MFA posted in 64-bit mode (??)
* CLR_HANDSHAKE: FW is waiting for HANDSHAKE from BIOS or Driver
+ * HOTPLUG : Resume from Hotplug
+ * MFI_STOP_ADP : Send signal to FW to stop processing
*/
-#define MFI_INIT_ABORT 0x00000000
+#define MFI_INIT_ABORT 0x00000001
#define MFI_INIT_READY 0x00000002
#define MFI_INIT_MFIMODE 0x00000004
#define MFI_INIT_CLEAR_HANDSHAKE 0x00000008
-#define MFI_RESET_FLAGS MFI_INIT_READY|MFI_INIT_MFIMODE
+#define MFI_INIT_HOTPLUG 0x00000010
+#define MFI_STOP_ADP 0x00000020
+#define MFI_RESET_FLAGS MFI_INIT_READY| \
+ MFI_INIT_MFIMODE| \
+ MFI_INIT_ABORT
/**
* MFI frame flags
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2006-09-21 0:22 UTC | newest]
Thread overview: (only message) (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2006-09-21 1:22 [Patch 1/7] megaraid_sas FW transition and q size changes Sumant Patro
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.