[SCSI] megaraid_sas: FW transition and q size changes

This patch has the following enhancements :
        a. handles new transition states of FW to support controller hotplug.
        b. It reduces by 1 the maximum cmds that the driver may send to FW.
        c. Sends "Stop Processing" cmd to FW before returning failure from reset routine
        d. Adds print in megasas_transition routine
        e. Sends "RESET" flag to FW to do a soft reset of controller
to move from Operational to Ready state.
	f. Sending correct pointer (cmd->sense) to pci_pool_free

Signed-off-by: Sumant Patro <Sumant.Patro@lsil.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 9 insertions, 2 deletions

diff --git a/drivers/scsi/megaraid/megaraid_sas.h b/drivers/scsi/megaraid/megaraid_sas.h
index 3531a14222a7..930c06d0a4f7 100644
--- a/drivers/scsi/megaraid/megaraid_sas.h
+++ b/drivers/scsi/megaraid/megaraid_sas.h
@@ -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