[SCSI] megaraid_sas: Add 9565/9285 specific code
authoradam radford <aradford@gmail.com>
Tue, 21 Dec 2010 21:34:31 +0000 (13:34 -0800)
committerJames Bottomley <James.Bottomley@suse.de>
Thu, 23 Dec 2010 05:26:53 +0000 (23:26 -0600)
This patch adds MegaRAID 9265/9285 (Device id 0x5b) specific code

Signed-off-by: Adam Radford <aradford@gmail.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
drivers/scsi/megaraid/Makefile
drivers/scsi/megaraid/megaraid_sas.h
drivers/scsi/megaraid/megaraid_sas_base.c
drivers/scsi/megaraid/megaraid_sas_fp.c [new file with mode: 0644]
drivers/scsi/megaraid/megaraid_sas_fusion.c [new file with mode: 0644]
drivers/scsi/megaraid/megaraid_sas_fusion.h [new file with mode: 0644]

index 6613a2ceea036d3c797c305901e189d4dc366c63..5826ed509e3e69db5ca648e9bbbcdcf3758c9042 100644 (file)
@@ -1,4 +1,5 @@
 obj-$(CONFIG_MEGARAID_MM)      += megaraid_mm.o
 obj-$(CONFIG_MEGARAID_MAILBOX) += megaraid_mbox.o
 obj-$(CONFIG_MEGARAID_SAS)     += megaraid_sas.o
-megaraid_sas-objs := megaraid_sas_base.o
+megaraid_sas-objs := megaraid_sas_base.o megaraid_sas_fusion.o \
+       megaraid_sas_fp.o
index a0b8ee1a5d2d4c101a260c10c76da680041b590c..1b5e375732c01c7d97486e9e47f108a0982fcf29 100644 (file)
@@ -33,9 +33,9 @@
 /*
  * MegaRAID SAS Driver meta data
  */
-#define MEGASAS_VERSION                        "00.00.04.31-rc1"
-#define MEGASAS_RELDATE                        "May 3, 2010"
-#define MEGASAS_EXT_VERSION            "Mon. May 3, 11:41:51 PST 2010"
+#define MEGASAS_VERSION                                "00.00.05.29-rc1"
+#define MEGASAS_RELDATE                                "Dec. 7, 2010"
+#define MEGASAS_EXT_VERSION                    "Tue. Dec. 7 17:00:00 PDT 2010"
 
 /*
  * Device IDs
@@ -47,6 +47,7 @@
 #define        PCI_DEVICE_ID_LSI_SAS0079GEN2           0x0079
 #define        PCI_DEVICE_ID_LSI_SAS0073SKINNY         0x0073
 #define        PCI_DEVICE_ID_LSI_SAS0071SKINNY         0x0071
+#define        PCI_DEVICE_ID_LSI_FUSION                0x005b
 
 /*
  * =====================================
@@ -436,7 +437,6 @@ struct megasas_ctrl_prop {
        * Add properties that can be controlled by
        * a bit in the following structure.
        */
-
        struct {
                u32     copyBackDisabled            : 1;
                u32     SMARTerEnabled              : 1;
@@ -716,6 +716,7 @@ struct megasas_ctrl_info {
 #define MEGASAS_DEFAULT_INIT_ID                        -1
 #define MEGASAS_MAX_LUN                                8
 #define MEGASAS_MAX_LD                         64
+#define MEGASAS_DEFAULT_CMD_PER_LUN            128
 #define MEGASAS_MAX_PD                          (MEGASAS_MAX_PD_CHANNELS * \
                                                MEGASAS_MAX_DEV_PER_CHANNEL)
 #define MEGASAS_MAX_LD_IDS                     (MEGASAS_MAX_LD_CHANNELS * \
@@ -784,7 +785,10 @@ struct megasas_ctrl_info {
 */
  
 struct megasas_register_set {
-       u32     reserved_0[4];                  /*0000h*/
+       u32     doorbell;                       /*0000h*/
+       u32     fusion_seq_offset;              /*0004h*/
+       u32     fusion_host_diag;               /*0008h*/
+       u32     reserved_01;                    /*000Ch*/
 
        u32     inbound_msg_0;                  /*0010h*/
        u32     inbound_msg_1;                  /*0014h*/
@@ -804,15 +808,18 @@ struct megasas_register_set {
        u32     inbound_queue_port;             /*0040h*/
        u32     outbound_queue_port;            /*0044h*/
 
-       u32     reserved_2[22];                 /*0048h*/
+       u32     reserved_2[9];                  /*0048h*/
+       u32     reply_post_host_index;          /*006Ch*/
+       u32     reserved_2_2[12];               /*0070h*/
 
        u32     outbound_doorbell_clear;        /*00A0h*/
 
        u32     reserved_3[3];                  /*00A4h*/
 
        u32     outbound_scratch_pad ;          /*00B0h*/
+       u32     outbound_scratch_pad_2;         /*00B4h*/
 
-       u32     reserved_4[3];                  /*00B4h*/
+       u32     reserved_4[2];                  /*00B8h*/
 
        u32     inbound_low_queue_port ;        /*00C0h*/
 
@@ -1287,6 +1294,9 @@ struct megasas_instance {
 
        u16 max_num_sge;
        u16 max_fw_cmds;
+       /* For Fusion its num IOCTL cmds, for others MFI based its
+          max_fw_cmds */
+       u16 max_mfi_cmds;
        u32 max_sectors_per_req;
        struct megasas_aen_event *ev;
 
@@ -1336,9 +1346,15 @@ struct megasas_instance {
        struct timer_list io_completion_timer;
        struct list_head internal_reset_pending_q;
 
+       /* Ptr to hba specfic information */
+       void *ctrl_context;
        u8      msi_flag;
        struct msix_entry msixentry;
+       u64 map_id;
+       struct megasas_cmd *map_update_cmd;
        unsigned long bar;
+       long reset_flags;
+       struct mutex reset_mutex;
 };
 
 enum {
@@ -1397,7 +1413,13 @@ struct megasas_cmd {
        struct list_head list;
        struct scsi_cmnd *scmd;
        struct megasas_instance *instance;
-       u32 frame_count;
+       union {
+               struct {
+                       u16 smid;
+                       u16 resvd;
+               } context;
+               u32 frame_count;
+       };
 };
 
 #define MAX_MGMT_ADAPTERS              1024
index 5938267e472bfe423df0e9292e12d25098cbde93..5d6d07bd1cd0565f0c89b004e494d1d15c06a8a7 100644 (file)
@@ -53,6 +53,7 @@
 #include <scsi/scsi_cmnd.h>
 #include <scsi/scsi_device.h>
 #include <scsi/scsi_host.h>
+#include "megaraid_sas_fusion.h"
 #include "megaraid_sas.h"
 
 /*
@@ -81,7 +82,7 @@ MODULE_VERSION(MEGASAS_VERSION);
 MODULE_AUTHOR("megaraidlinux@lsi.com");
 MODULE_DESCRIPTION("LSI MegaRAID SAS Driver");
 
-static int megasas_transition_to_ready(struct megasas_instance *instance);
+int megasas_transition_to_ready(struct megasas_instance *instance);
 static int megasas_get_pd_list(struct megasas_instance *instance);
 static int megasas_issue_init_mfi(struct megasas_instance *instance);
 static int megasas_register_aen(struct megasas_instance *instance,
@@ -109,6 +110,8 @@ static struct pci_device_id megasas_pci_table[] = {
        /* xscale IOP, vega */
        {PCI_DEVICE(PCI_VENDOR_ID_DELL, PCI_DEVICE_ID_DELL_PERC5)},
        /* xscale IOP */
+       {PCI_DEVICE(PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_FUSION)},
+       /* Fusion */
        {}
 };
 
@@ -122,15 +125,16 @@ static DEFINE_MUTEX(megasas_async_queue_mutex);
 static int megasas_poll_wait_aen;
 static DECLARE_WAIT_QUEUE_HEAD(megasas_poll_wait);
 static u32 support_poll_for_event;
-static u32 megasas_dbg_lvl;
+u32 megasas_dbg_lvl;
 static u32 support_device_change;
 
 /* define lock for aen poll */
 spinlock_t poll_aen_lock;
 
-static void
+void
 megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
                     u8 alt_status);
+
 static irqreturn_t megasas_isr(int irq, void *devp);
 static u32
 megasas_init_adapter_mfi(struct megasas_instance *instance);
@@ -138,6 +142,23 @@ u32
 megasas_build_and_issue_cmd(struct megasas_instance *instance,
                            struct scsi_cmnd *scmd);
 static void megasas_complete_cmd_dpc(unsigned long instance_addr);
+void
+megasas_release_fusion(struct megasas_instance *instance);
+int
+megasas_ioc_init_fusion(struct megasas_instance *instance);
+void
+megasas_free_cmds_fusion(struct megasas_instance *instance);
+u8
+megasas_get_map_info(struct megasas_instance *instance);
+int
+megasas_sync_map_info(struct megasas_instance *instance);
+int
+wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd);
+void megasas_reset_reply_desc(struct megasas_instance *instance);
+u8 MR_ValidateMapInfo(struct MR_FW_RAID_MAP_ALL *map,
+                     struct LD_LOAD_BALANCE_INFO *lbInfo);
+int megasas_reset_fusion(struct Scsi_Host *shost);
+void megasas_fusion_ocr_wq(struct work_struct *work);
 
 void
 megasas_issue_dcmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
@@ -152,7 +173,7 @@ megasas_issue_dcmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
  *
  * Returns a free command from the pool
  */
-static struct megasas_cmd *megasas_get_cmd(struct megasas_instance
+struct megasas_cmd *megasas_get_cmd(struct megasas_instance
                                                  *instance)
 {
        unsigned long flags;
@@ -177,7 +198,7 @@ static struct megasas_cmd *megasas_get_cmd(struct megasas_instance
  * @instance:          Adapter soft state
  * @cmd:               Command packet to be returned to free command pool
  */
-static inline void
+inline void
 megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
 {
        unsigned long flags;
@@ -185,6 +206,7 @@ megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
        spin_lock_irqsave(&instance->cmd_pool_lock, flags);
 
        cmd->scmd = NULL;
+       cmd->frame_count = 0;
        list_add_tail(&cmd->list, &instance->cmd_pool);
 
        spin_unlock_irqrestore(&instance->cmd_pool_lock, flags);
@@ -796,6 +818,11 @@ static struct megasas_instance_template megasas_instance_template_gen2 = {
 *       specific to gen2 (deviceid : 0x78, 0x79) controllers
 */
 
+/*
+ * Template added for TB (Fusion)
+ */
+extern struct megasas_instance_template megasas_instance_template_fusion;
+
 /**
  * megasas_issue_polled -      Issues a polling command
  * @instance:                  Adapter soft state
@@ -803,11 +830,9 @@ static struct megasas_instance_template megasas_instance_template_gen2 = {
  *
  * For polling, MFI requires the cmd_status to be set to 0xFF before posting.
  */
-static int
+int
 megasas_issue_polled(struct megasas_instance *instance, struct megasas_cmd *cmd)
 {
-       int i;
-       u32 msecs = MFI_POLL_TIMEOUT_SECS * 1000;
 
        struct megasas_header *frame_hdr = &cmd->frame->hdr;
 
@@ -817,21 +842,12 @@ megasas_issue_polled(struct megasas_instance *instance, struct megasas_cmd *cmd)
        /*
         * Issue the frame using inbound queue port
         */
-       instance->instancet->fire_cmd(instance,
-                       cmd->frame_phys_addr, 0, instance->reg_set);
+       instance->instancet->issue_dcmd(instance, cmd);
 
        /*
         * Wait for cmd_status to change
         */
-       for (i = 0; (i < msecs) && (frame_hdr->cmd_status == 0xff); i++) {
-               rmb();
-               msleep(1);
-       }
-
-       if (frame_hdr->cmd_status == 0xff)
-               return -ETIME;
-
-       return 0;
+       return wait_and_poll(instance, cmd);
 }
 
 /**
@@ -849,8 +865,7 @@ megasas_issue_blocked_cmd(struct megasas_instance *instance,
 {
        cmd->cmd_status = ENODATA;
 
-       instance->instancet->fire_cmd(instance,
-                       cmd->frame_phys_addr, 0, instance->reg_set);
+       instance->instancet->issue_dcmd(instance, cmd);
 
        wait_event(instance->int_cmd_wait_q, cmd->cmd_status != ENODATA);
 
@@ -894,8 +909,7 @@ megasas_issue_blocked_abort_cmd(struct megasas_instance *instance,
        cmd->sync_cmd = 1;
        cmd->cmd_status = 0xFF;
 
-       instance->instancet->fire_cmd(instance,
-                       cmd->frame_phys_addr, 0, instance->reg_set);
+       instance->instancet->issue_dcmd(instance, cmd);
 
        /*
         * Wait for this cmd to complete
@@ -1291,7 +1305,7 @@ megasas_build_ldio(struct megasas_instance *instance, struct scsi_cmnd *scp,
  * Called by megasas_queue_command to find out if the command to be queued
  * is a logical drive command
  */
-static inline int megasas_is_ldio(struct scsi_cmnd *cmd)
+inline int megasas_is_ldio(struct scsi_cmnd *cmd)
 {
        if (!MEGASAS_IS_LOGICAL(cmd))
                return 0;
@@ -1551,15 +1565,44 @@ static int megasas_slave_alloc(struct scsi_device *sdev)
        return 0;
 }
 
-static void megaraid_sas_kill_hba(struct megasas_instance *instance)
+void megaraid_sas_kill_hba(struct megasas_instance *instance)
 {
        if ((instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
-               (instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
-               writel(MFI_STOP_ADP,
-                       &instance->reg_set->reserved_0[0]);
+           (instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY) ||
+           (instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION)) {
+               writel(MFI_STOP_ADP, &instance->reg_set->doorbell);
        } else {
-               writel(MFI_STOP_ADP,
-                       &instance->reg_set->inbound_doorbell);
+               writel(MFI_STOP_ADP, &instance->reg_set->inbound_doorbell);
+       }
+}
+
+ /**
+  * megasas_check_and_restore_queue_depth - Check if queue depth needs to be
+  *                                    restored to max value
+  * @instance:                 Adapter soft state
+  *
+  */
+void
+megasas_check_and_restore_queue_depth(struct megasas_instance *instance)
+{
+       unsigned long flags;
+       if (instance->flag & MEGASAS_FW_BUSY
+               && time_after(jiffies, instance->last_time + 5 * HZ)
+               && atomic_read(&instance->fw_outstanding) < 17) {
+
+               spin_lock_irqsave(instance->host->host_lock, flags);
+               instance->flag &= ~MEGASAS_FW_BUSY;
+               if ((instance->pdev->device ==
+                       PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
+                       (instance->pdev->device ==
+                       PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
+                       instance->host->can_queue =
+                               instance->max_fw_cmds - MEGASAS_SKINNY_INT_CMDS;
+               } else
+                       instance->host->can_queue =
+                               instance->max_fw_cmds - MEGASAS_INT_CMDS;
+
+               spin_unlock_irqrestore(instance->host->host_lock, flags);
        }
 }
 
@@ -1613,24 +1656,7 @@ static void megasas_complete_cmd_dpc(unsigned long instance_addr)
        /*
         * Check if we can restore can_queue
         */
-       if (instance->flag & MEGASAS_FW_BUSY
-               && time_after(jiffies, instance->last_time + 5 * HZ)
-               && atomic_read(&instance->fw_outstanding) < 17) {
-
-               spin_lock_irqsave(instance->host->host_lock, flags);
-               instance->flag &= ~MEGASAS_FW_BUSY;
-               if ((instance->pdev->device ==
-                       PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
-                       (instance->pdev->device ==
-                       PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
-                       instance->host->can_queue =
-                               instance->max_fw_cmds - MEGASAS_SKINNY_INT_CMDS;
-               } else
-                       instance->host->can_queue =
-                               instance->max_fw_cmds - MEGASAS_INT_CMDS;
-
-               spin_unlock_irqrestore(instance->host->host_lock, flags);
-       }
+       megasas_check_and_restore_queue_depth(instance);
 }
 
 static void
@@ -1808,7 +1834,7 @@ static int megasas_wait_for_outstanding(struct megasas_instance *instance)
                        (instance->pdev->device ==
                        PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
                        writel(MFI_STOP_ADP,
-                               &instance->reg_set->reserved_0[0]);
+                               &instance->reg_set->doorbell);
                } else {
                        writel(MFI_STOP_ADP,
                                &instance->reg_set->inbound_doorbell);
@@ -1912,11 +1938,16 @@ static int megasas_reset_device(struct scsi_cmnd *scmd)
 static int megasas_reset_bus_host(struct scsi_cmnd *scmd)
 {
        int ret;
+       struct megasas_instance *instance;
+       instance = (struct megasas_instance *)scmd->device->host->hostdata;
 
        /*
         * First wait for all commands to complete
         */
-       ret = megasas_generic_reset(scmd);
+       if (instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION)
+               ret = megasas_reset_fusion(scmd->device->host);
+       else
+               ret = megasas_generic_reset(scmd);
 
        return ret;
 }
@@ -2086,13 +2117,14 @@ megasas_complete_abort(struct megasas_instance *instance,
  *                             an alternate status (as in the case of aborted
  *                             commands)
  */
-static void
+void
 megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
                     u8 alt_status)
 {
        int exception = 0;
        struct megasas_header *hdr = &cmd->frame->hdr;
        unsigned long flags;
+       struct fusion_context *fusion = instance->ctrl_context;
 
        /* flag for the retry reset */
        cmd->retry_for_fw_reset = 0;
@@ -2185,6 +2217,37 @@ megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
        case MFI_CMD_SMP:
        case MFI_CMD_STP:
        case MFI_CMD_DCMD:
+               /* Check for LD map update */
+               if ((cmd->frame->dcmd.opcode == MR_DCMD_LD_MAP_GET_INFO) &&
+                   (cmd->frame->dcmd.mbox.b[1] == 1)) {
+                       spin_lock_irqsave(instance->host->host_lock, flags);
+                       if (cmd->frame->hdr.cmd_status != 0) {
+                               if (cmd->frame->hdr.cmd_status !=
+                                   MFI_STAT_NOT_FOUND)
+                                       printk(KERN_WARNING "megasas: map sync"
+                                              "failed, status = 0x%x.\n",
+                                              cmd->frame->hdr.cmd_status);
+                               else {
+                                       megasas_return_cmd(instance, cmd);
+                                       spin_unlock_irqrestore(
+                                               instance->host->host_lock,
+                                               flags);
+                                       break;
+                               }
+                       } else
+                               instance->map_id++;
+                       megasas_return_cmd(instance, cmd);
+                       if (MR_ValidateMapInfo(
+                                   fusion->ld_map[(instance->map_id & 1)],
+                                   fusion->load_balance_info))
+                               fusion->fast_path_io = 1;
+                       else
+                               fusion->fast_path_io = 0;
+                       megasas_sync_map_info(instance);
+                       spin_unlock_irqrestore(instance->host->host_lock,
+                                              flags);
+                       break;
+               }
                if (cmd->frame->dcmd.opcode == MR_DCMD_CTRL_EVENT_GET_INFO ||
                        cmd->frame->dcmd.opcode == MR_DCMD_CTRL_EVENT_GET) {
                        spin_lock_irqsave(&poll_aen_lock, flags);
@@ -2523,7 +2586,7 @@ static irqreturn_t megasas_isr(int irq, void *devp)
  * states, driver must take steps to bring it to ready state. Otherwise, it
  * has to wait for the ready state.
  */
-static int
+int
 megasas_transition_to_ready(struct megasas_instance* instance)
 {
        int i;
@@ -2557,11 +2620,12 @@ megasas_transition_to_ready(struct megasas_instance* instance)
                        if ((instance->pdev->device ==
                                PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
                                (instance->pdev->device ==
-                               PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
-
+                                PCI_DEVICE_ID_LSI_SAS0071SKINNY) ||
+                               (instance->pdev->device ==
+                                PCI_DEVICE_ID_LSI_FUSION)) {
                                writel(
                                  MFI_INIT_CLEAR_HANDSHAKE|MFI_INIT_HOTPLUG,
-                                 &instance->reg_set->reserved_0[0]);
+                                 &instance->reg_set->doorbell);
                        } else {
                                writel(
                                    MFI_INIT_CLEAR_HANDSHAKE|MFI_INIT_HOTPLUG,
@@ -2574,11 +2638,13 @@ megasas_transition_to_ready(struct megasas_instance* instance)
 
                case MFI_STATE_BOOT_MESSAGE_PENDING:
                        if ((instance->pdev->device ==
-                               PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
-                       (instance->pdev->device ==
-                               PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
+                            PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
+                               (instance->pdev->device ==
+                                PCI_DEVICE_ID_LSI_SAS0071SKINNY) ||
+                           (instance->pdev->device ==
+                            PCI_DEVICE_ID_LSI_FUSION)) {
                                writel(MFI_INIT_HOTPLUG,
-                               &instance->reg_set->reserved_0[0]);
+                                      &instance->reg_set->doorbell);
                        } else
                                writel(MFI_INIT_HOTPLUG,
                                        &instance->reg_set->inbound_doorbell);
@@ -2595,9 +2661,23 @@ megasas_transition_to_ready(struct megasas_instance* instance)
                        if ((instance->pdev->device ==
                                PCI_DEVICE_ID_LSI_SAS0073SKINNY) ||
                                (instance->pdev->device ==
-                               PCI_DEVICE_ID_LSI_SAS0071SKINNY)) {
+                               PCI_DEVICE_ID_LSI_SAS0071SKINNY)  ||
+                               (instance->pdev->device
+                                       == PCI_DEVICE_ID_LSI_FUSION)) {
                                writel(MFI_RESET_FLAGS,
-                                       &instance->reg_set->reserved_0[0]);
+                                       &instance->reg_set->doorbell);
+                               if (instance->pdev->device ==
+                                   PCI_DEVICE_ID_LSI_FUSION) {
+                                       for (i = 0; i < (10 * 1000); i += 20) {
+                                               if (readl(
+                                                           &instance->
+                                                           reg_set->
+                                                           doorbell) & 1)
+                                                       msleep(20);
+                                               else
+                                                       break;
+                                       }
+                               }
                        } else
                                writel(MFI_RESET_FLAGS,
                                        &instance->reg_set->inbound_doorbell);
@@ -2681,7 +2761,7 @@ megasas_transition_to_ready(struct megasas_instance* instance)
 static void megasas_teardown_frame_pool(struct megasas_instance *instance)
 {
        int i;
-       u32 max_cmd = instance->max_fw_cmds;
+       u32 max_cmd = instance->max_mfi_cmds;
        struct megasas_cmd *cmd;
 
        if (!instance->frame_dma_pool)
@@ -2732,7 +2812,7 @@ static int megasas_create_frame_pool(struct megasas_instance *instance)
        u32 frame_count;
        struct megasas_cmd *cmd;
 
-       max_cmd = instance->max_fw_cmds;
+       max_cmd = instance->max_mfi_cmds;
 
        /*
         * Size of our frame is 64 bytes for MFI frame, followed by max SG
@@ -2819,14 +2899,15 @@ static int megasas_create_frame_pool(struct megasas_instance *instance)
  * megasas_free_cmds - Free all the cmds in the free cmd pool
  * @instance:          Adapter soft state
  */
-static void megasas_free_cmds(struct megasas_instance *instance)
+void megasas_free_cmds(struct megasas_instance *instance)
 {
        int i;
        /* First free the MFI frame pool */
        megasas_teardown_frame_pool(instance);
 
        /* Free all the commands in the cmd_list */
-       for (i = 0; i < instance->max_fw_cmds; i++)
+       for (i = 0; i < instance->max_mfi_cmds; i++)
+
                kfree(instance->cmd_list[i]);
 
        /* Free the cmd_list buffer itself */
@@ -2854,14 +2935,14 @@ static void megasas_free_cmds(struct megasas_instance *instance)
  * This array is used only to look up the megasas_cmd given the context. The
  * free commands themselves are maintained in a linked list called cmd_pool.
  */
-static int megasas_alloc_cmds(struct megasas_instance *instance)
+int megasas_alloc_cmds(struct megasas_instance *instance)
 {
        int i;
        int j;
        u32 max_cmd;
        struct megasas_cmd *cmd;
 
-       max_cmd = instance->max_fw_cmds;
+       max_cmd = instance->max_mfi_cmds;
 
        /*
         * instance->cmd_list is an array of struct megasas_cmd pointers.
@@ -2875,6 +2956,7 @@ static int megasas_alloc_cmds(struct megasas_instance *instance)
                return -ENOMEM;
        }
 
+       memset(instance->cmd_list, 0, sizeof(struct megasas_cmd *) *max_cmd);
 
        for (i = 0; i < max_cmd; i++) {
                instance->cmd_list[i] = kmalloc(sizeof(struct megasas_cmd),
@@ -3288,6 +3370,7 @@ megasas_init_adapter_mfi(struct megasas_instance *instance)
         * does not exceed max cmds that the FW can support
         */
        instance->max_fw_cmds = instance->max_fw_cmds-1;
+       instance->max_mfi_cmds = instance->max_fw_cmds;
        instance->max_num_sge = (instance->instancet->read_fw_status_reg(reg_set) & 0xFF0000) >>
                                        0x10;
        /*
@@ -3381,6 +3464,9 @@ static int megasas_init_fw(struct megasas_instance *instance)
        reg_set = instance->reg_set;
 
        switch (instance->pdev->device) {
+       case PCI_DEVICE_ID_LSI_FUSION:
+               instance->instancet = &megasas_instance_template_fusion;
+               break;
        case PCI_DEVICE_ID_LSI_SAS1078R:
        case PCI_DEVICE_ID_LSI_SAS1078DE:
                instance->instancet = &megasas_instance_template_ppc;
@@ -3482,9 +3568,10 @@ fail_ready_state:
  */
 static void megasas_release_mfi(struct megasas_instance *instance)
 {
-       u32 reply_q_sz = sizeof(u32) * (instance->max_fw_cmds + 1);
+       u32 reply_q_sz = sizeof(u32) *(instance->max_mfi_cmds + 1);
 
-       pci_free_consistent(instance->pdev, reply_q_sz,
+       if (instance->reply_queue)
+               pci_free_consistent(instance->pdev, reply_q_sz,
                            instance->reply_queue, instance->reply_queue_h);
 
        megasas_free_cmds(instance);
@@ -3678,8 +3765,7 @@ megasas_register_aen(struct megasas_instance *instance, u32 seq_num,
        /*
         * Issue the aen registration frame
         */
-       instance->instancet->fire_cmd(instance,
-                       cmd->frame_phys_addr, 0, instance->reg_set);
+       instance->instancet->issue_dcmd(instance, cmd);
 
        return 0;
 }
@@ -3756,12 +3842,18 @@ static int megasas_io_attach(struct megasas_instance *instance)
        }
 
        host->max_sectors = instance->max_sectors_per_req;
-       host->cmd_per_lun = 128;
+       host->cmd_per_lun = MEGASAS_DEFAULT_CMD_PER_LUN;
        host->max_channel = MEGASAS_MAX_CHANNELS - 1;
        host->max_id = MEGASAS_MAX_DEV_PER_CHANNEL;
        host->max_lun = MEGASAS_MAX_LUN;
        host->max_cmd_len = 16;
 
+       /* Fusion only supports host reset */
+       if (instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION) {
+               host->hostt->eh_device_reset_handler = NULL;
+               host->hostt->eh_bus_reset_handler = NULL;
+       }
+
        /*
         * Notify the mid-layer about the new controller
         */
@@ -3846,20 +3938,45 @@ megasas_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
        instance = (struct megasas_instance *)host->hostdata;
        memset(instance, 0, sizeof(*instance));
        atomic_set( &instance->fw_reset_no_pci_access, 0 );
+       instance->pdev = pdev;
 
-       instance->producer = pci_alloc_consistent(pdev, sizeof(u32),
-                                                 &instance->producer_h);
-       instance->consumer = pci_alloc_consistent(pdev, sizeof(u32),
-                                                 &instance->consumer_h);
+       switch (instance->pdev->device) {
+       case PCI_DEVICE_ID_LSI_FUSION:
+       {
+               struct fusion_context *fusion;
+
+               instance->ctrl_context =
+                       kzalloc(sizeof(struct fusion_context), GFP_KERNEL);
+               if (!instance->ctrl_context) {
+                       printk(KERN_DEBUG "megasas: Failed to allocate "
+                              "memory for Fusion context info\n");
+                       goto fail_alloc_dma_buf;
+               }
+               fusion = instance->ctrl_context;
+               INIT_LIST_HEAD(&fusion->cmd_pool);
+               spin_lock_init(&fusion->cmd_pool_lock);
+       }
+       break;
+       default: /* For all other supported controllers */
+
+               instance->producer =
+                       pci_alloc_consistent(pdev, sizeof(u32),
+                                            &instance->producer_h);
+               instance->consumer =
+                       pci_alloc_consistent(pdev, sizeof(u32),
+                                            &instance->consumer_h);
+
+               if (!instance->producer || !instance->consumer) {
+                       printk(KERN_DEBUG "megasas: Failed to allocate"
+                              "memory for producer, consumer\n");
+                       goto fail_alloc_dma_buf;
+               }
 
-       if (!instance->producer || !instance->consumer) {
-               printk(KERN_DEBUG "megasas: Failed to allocate memory for "
-                      "producer, consumer\n");
-               goto fail_alloc_dma_buf;
+               *instance->producer = 0;
+               *instance->consumer = 0;
+               break;
        }
 
-       *instance->producer = 0;
-       *instance->consumer = 0;
        megasas_poll_wait_aen = 0;
        instance->flag_ieee = 0;
        instance->ev = NULL;
@@ -3895,11 +4012,11 @@ megasas_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
        spin_lock_init(&poll_aen_lock);
 
        mutex_init(&instance->aen_mutex);
+       mutex_init(&instance->reset_mutex);
 
        /*
         * Initialize PCI related and misc parameters
         */
-       instance->pdev = pdev;
        instance->host = host;
        instance->unique_id = pdev->bus->number << 8 | pdev->devfn;
        instance->init_id = MEGASAS_DEFAULT_INIT_ID;
@@ -3917,7 +4034,10 @@ megasas_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
        instance->last_time = 0;
        instance->disableOnlineCtrlReset = 1;
 
-       INIT_WORK(&instance->work_init, process_fw_state_change_wq);
+       if (instance->pdev->device == PCI_DEVICE_ID_LSI_FUSION)
+               INIT_WORK(&instance->work_init, megasas_fusion_ocr_wq);
+       else
+               INIT_WORK(&instance->work_init, process_fw_state_change_wq);
 
        /*
         * Initialize MFI Firmware
@@ -4000,6 +4120,8 @@ megasas_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
                pci_free_consistent(pdev, sizeof(u32), instance->producer,
                                    instance->producer_h);
                megasas_release_mfi(instance);
+       } else {
+               megasas_release_fusion(instance);
        }
        if (instance->consumer)
                pci_free_consistent(pdev, sizeof(u32), instance->consumer,
@@ -4072,7 +4194,9 @@ static void megasas_shutdown_controller(struct megasas_instance *instance,
 
        if (instance->aen_cmd)
                megasas_issue_blocked_abort_cmd(instance, instance->aen_cmd);
-
+       if (instance->map_update_cmd)
+               megasas_issue_blocked_abort_cmd(instance,
+                                               instance->map_update_cmd);
        dcmd = &cmd->frame->dcmd;
 
        memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
@@ -4177,9 +4301,6 @@ megasas_resume(struct pci_dev *pdev)
         * Initialize MFI Firmware
         */
 
-       *instance->producer = 0;
-       *instance->consumer = 0;
-
        atomic_set(&instance->fw_outstanding, 0);
 
        /*
@@ -4188,11 +4309,29 @@ megasas_resume(struct pci_dev *pdev)
        if (megasas_transition_to_ready(instance))
                goto fail_ready_state;
 
-       if (megasas_issue_init_mfi(instance))
-               goto fail_init_mfi;
+       switch (instance->pdev->device) {
+       case PCI_DEVICE_ID_LSI_FUSION:
+       {
+               megasas_reset_reply_desc(instance);
+               if (megasas_ioc_init_fusion(instance)) {
+                       megasas_free_cmds(instance);
+                       megasas_free_cmds_fusion(instance);
+                       goto fail_init_mfi;
+               }
+               if (!megasas_get_map_info(instance))
+                       megasas_sync_map_info(instance);
+       }
+       break;
+       default:
+               *instance->producer = 0;
+               *instance->consumer = 0;
+               if (megasas_issue_init_mfi(instance))
+                       goto fail_init_mfi;
+               break;
+       }
 
-       tasklet_init(&instance->isr_tasklet, megasas_complete_cmd_dpc,
-                       (unsigned long)instance);
+       tasklet_init(&instance->isr_tasklet, instance->instancet->tasklet,
+                    (unsigned long)instance);
 
        /* Now re-enable MSI-X */
        if (instance->msi_flag)
@@ -4261,10 +4400,12 @@ static void __devexit megasas_detach_one(struct pci_dev *pdev)
        int i;
        struct Scsi_Host *host;
        struct megasas_instance *instance;
+       struct fusion_context *fusion;
 
        instance = pci_get_drvdata(pdev);
        instance->unload = 1;
        host = instance->host;
+       fusion = instance->ctrl_context;
 
        if (poll_mode_io)
                del_timer_sync(&instance->io_completion_timer);
@@ -4306,16 +4447,32 @@ static void __devexit megasas_detach_one(struct pci_dev *pdev)
        if (instance->msi_flag)
                pci_disable_msix(instance->pdev);
 
-       megasas_release_mfi(instance);
-
-       pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
-                           instance->evt_detail, instance->evt_detail_h);
-
-       pci_free_consistent(pdev, sizeof(u32), instance->producer,
-                           instance->producer_h);
-
-       pci_free_consistent(pdev, sizeof(u32), instance->consumer,
-                           instance->consumer_h);
+       switch (instance->pdev->device) {
+       case PCI_DEVICE_ID_LSI_FUSION:
+               megasas_release_fusion(instance);
+               for (i = 0; i < 2 ; i++)
+                       if (fusion->ld_map[i])
+                               dma_free_coherent(&instance->pdev->dev,
+                                                 fusion->map_sz,
+                                                 fusion->ld_map[i],
+                                                 fusion->
+                                                 ld_map_phys[i]);
+               kfree(instance->ctrl_context);
+               break;
+       default:
+               megasas_release_mfi(instance);
+               pci_free_consistent(pdev,
+                                   sizeof(struct megasas_evt_detail),
+                                   instance->evt_detail,
+                                   instance->evt_detail_h);
+               pci_free_consistent(pdev, sizeof(u32),
+                                   instance->producer,
+                                   instance->producer_h);
+               pci_free_consistent(pdev, sizeof(u32),
+                                   instance->consumer,
+                                   instance->consumer_h);
+               break;
+       }
 
        scsi_host_put(host);
 
@@ -5079,6 +5236,7 @@ megasas_aen_polling(struct work_struct *work)
                        break;
                case MR_EVT_CTRL_HOST_BUS_SCAN_REQUESTED:
                case MR_EVT_FOREIGN_CFG_IMPORTED:
+               case MR_EVT_LD_STATE_CHANGE:
                        doscan = 1;
                        break;
                default:
diff --git a/drivers/scsi/megaraid/megaraid_sas_fp.c b/drivers/scsi/megaraid/megaraid_sas_fp.c
new file mode 100644 (file)
index 0000000..53fa96a
--- /dev/null
@@ -0,0 +1,516 @@
+/*
+ *  Linux MegaRAID driver for SAS based RAID controllers
+ *
+ *  Copyright (c) 2009-2011  LSI Corporation.
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version 2
+ *  of the License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ *  FILE: megaraid_sas_fp.c
+ *
+ *  Authors: LSI Corporation
+ *           Sumant Patro
+ *           Varad Talamacki
+ *           Manoj Jose
+ *
+ *  Send feedback to: <megaraidlinux@lsi.com>
+ *
+ *  Mail to: LSI Corporation, 1621 Barber Lane, Milpitas, CA 95035
+ *     ATTN: Linuxraid
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/list.h>
+#include <linux/moduleparam.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/smp_lock.h>
+#include <linux/uio.h>
+#include <linux/uaccess.h>
+#include <linux/fs.h>
+#include <linux/compat.h>
+#include <linux/blkdev.h>
+#include <linux/poll.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_host.h>
+
+#include "megaraid_sas_fusion.h"
+#include <asm/div64.h>
+
+#define ABS_DIFF(a, b)   (((a) > (b)) ? ((a) - (b)) : ((b) - (a)))
+#define MR_LD_STATE_OPTIMAL 3
+#define FALSE 0
+#define TRUE 1
+
+/* Prototypes */
+void
+mr_update_load_balance_params(struct MR_FW_RAID_MAP_ALL *map,
+                             struct LD_LOAD_BALANCE_INFO *lbInfo);
+
+u32 mega_mod64(u64 dividend, u32 divisor)
+{
+       u64 d;
+       u32 remainder;
+
+       if (!divisor)
+               printk(KERN_ERR "megasas : DIVISOR is zero, in div fn\n");
+       d = dividend;
+       remainder = do_div(d, divisor);
+       return remainder;
+}
+
+/**
+ * @param dividend    : Dividend
+ * @param divisor    : Divisor
+ *
+ * @return quotient
+ **/
+u64 mega_div64_32(uint64_t dividend, uint32_t divisor)
+{
+       u32 remainder;
+       u64 d;
+
+       if (!divisor)
+               printk(KERN_ERR "megasas : DIVISOR is zero in mod fn\n");
+
+       d = dividend;
+       remainder = do_div(d, divisor);
+
+       return d;
+}
+
+struct MR_LD_RAID *MR_LdRaidGet(u32 ld, struct MR_FW_RAID_MAP_ALL *map)
+{
+       return &map->raidMap.ldSpanMap[ld].ldRaid;
+}
+
+static struct MR_SPAN_BLOCK_INFO *MR_LdSpanInfoGet(u32 ld,
+                                                  struct MR_FW_RAID_MAP_ALL
+                                                  *map)
+{
+       return &map->raidMap.ldSpanMap[ld].spanBlock[0];
+}
+
+static u8 MR_LdDataArmGet(u32 ld, u32 armIdx, struct MR_FW_RAID_MAP_ALL *map)
+{
+       return map->raidMap.ldSpanMap[ld].dataArmMap[armIdx];
+}
+
+static u16 MR_ArPdGet(u32 ar, u32 arm, struct MR_FW_RAID_MAP_ALL *map)
+{
+       return map->raidMap.arMapInfo[ar].pd[arm];
+}
+
+static u16 MR_LdSpanArrayGet(u32 ld, u32 span, struct MR_FW_RAID_MAP_ALL *map)
+{
+       return map->raidMap.ldSpanMap[ld].spanBlock[span].span.arrayRef;
+}
+
+static u16 MR_PdDevHandleGet(u32 pd, struct MR_FW_RAID_MAP_ALL *map)
+{
+       return map->raidMap.devHndlInfo[pd].curDevHdl;
+}
+
+u16 MR_GetLDTgtId(u32 ld, struct MR_FW_RAID_MAP_ALL *map)
+{
+       return map->raidMap.ldSpanMap[ld].ldRaid.targetId;
+}
+
+u16 MR_TargetIdToLdGet(u32 ldTgtId, struct MR_FW_RAID_MAP_ALL *map)
+{
+       return map->raidMap.ldTgtIdToLd[ldTgtId];
+}
+
+static struct MR_LD_SPAN *MR_LdSpanPtrGet(u32 ld, u32 span,
+                                         struct MR_FW_RAID_MAP_ALL *map)
+{
+       return &map->raidMap.ldSpanMap[ld].spanBlock[span].span;
+}
+
+/*
+ * This function will validate Map info data provided by FW
+ */
+u8 MR_ValidateMapInfo(struct MR_FW_RAID_MAP_ALL *map,
+                     struct LD_LOAD_BALANCE_INFO *lbInfo)
+{
+       struct MR_FW_RAID_MAP *pFwRaidMap = &map->raidMap;
+
+       if (pFwRaidMap->totalSize !=
+           (sizeof(struct MR_FW_RAID_MAP) -sizeof(struct MR_LD_SPAN_MAP) +
+            (sizeof(struct MR_LD_SPAN_MAP) *pFwRaidMap->ldCount))) {
+               printk(KERN_ERR "megasas: map info structure size 0x%x is not matching with ld count\n",
+                      (unsigned int)((sizeof(struct MR_FW_RAID_MAP) -
+                                      sizeof(struct MR_LD_SPAN_MAP)) +
+                                     (sizeof(struct MR_LD_SPAN_MAP) *
+                                      pFwRaidMap->ldCount)));
+               printk(KERN_ERR "megasas: span map %x, pFwRaidMap->totalSize "
+                      ": %x\n", (unsigned int)sizeof(struct MR_LD_SPAN_MAP),
+                      pFwRaidMap->totalSize);
+               return 0;
+       }
+
+       mr_update_load_balance_params(map, lbInfo);
+
+       return 1;
+}
+
+u32 MR_GetSpanBlock(u32 ld, u64 row, u64 *span_blk,
+                   struct MR_FW_RAID_MAP_ALL *map, int *div_error)
+{
+       struct MR_SPAN_BLOCK_INFO *pSpanBlock = MR_LdSpanInfoGet(ld, map);
+       struct MR_QUAD_ELEMENT    *quad;
+       struct MR_LD_RAID         *raid = MR_LdRaidGet(ld, map);
+       u32                span, j;
+
+       for (span = 0; span < raid->spanDepth; span++, pSpanBlock++) {
+
+               for (j = 0; j < pSpanBlock->block_span_info.noElements; j++) {
+                       quad = &pSpanBlock->block_span_info.quad[j];
+
+                       if (quad->diff == 0) {
+                               *div_error = 1;
+                               return span;
+                       }
+                       if (quad->logStart <= row  &&  row <= quad->logEnd  &&
+                           (mega_mod64(row-quad->logStart, quad->diff)) == 0) {
+                               if (span_blk != NULL) {
+                                       u64  blk, debugBlk;
+                                       blk =
+                                               mega_div64_32(
+                                                       (row-quad->logStart),
+                                                       quad->diff);
+                                       debugBlk = blk;
+
+                                       blk = (blk + quad->offsetInSpan) <<
+                                               raid->stripeShift;
+                                       *span_blk = blk;
+                               }
+                               return span;
+                       }
+               }
+       }
+       return span;
+}
+
+/*
+******************************************************************************
+*
+* This routine calculates the arm, span and block for the specified stripe and
+* reference in stripe.
+*
+* Inputs :
+*
+*    ld   - Logical drive number
+*    stripRow        - Stripe number
+*    stripRef    - Reference in stripe
+*
+* Outputs :
+*
+*    span          - Span number
+*    block         - Absolute Block number in the physical disk
+*/
+u8 MR_GetPhyParams(u32 ld, u64 stripRow, u16 stripRef, u64 *pdBlock,
+                  u16 *pDevHandle, struct RAID_CONTEXT *pRAID_Context,
+                  struct MR_FW_RAID_MAP_ALL *map)
+{
+       struct MR_LD_RAID  *raid = MR_LdRaidGet(ld, map);
+       u32         pd, arRef;
+       u8          physArm, span;
+       u64         row;
+       u8          retval = TRUE;
+       int         error_code = 0;
+
+       row =  mega_div64_32(stripRow, raid->rowDataSize);
+
+       if (raid->level == 6) {
+               /* logical arm within row */
+               u32 logArm =  mega_mod64(stripRow, raid->rowDataSize);
+               u32 rowMod, armQ, arm;
+
+               if (raid->rowSize == 0)
+                       return FALSE;
+               /* get logical row mod */
+               rowMod = mega_mod64(row, raid->rowSize);
+               armQ = raid->rowSize-1-rowMod; /* index of Q drive */
+               arm = armQ+1+logArm; /* data always logically follows Q */
+               if (arm >= raid->rowSize) /* handle wrap condition */
+                       arm -= raid->rowSize;
+               physArm = (u8)arm;
+       } else  {
+               if (raid->modFactor == 0)
+                       return FALSE;
+               physArm = MR_LdDataArmGet(ld,  mega_mod64(stripRow,
+                                                         raid->modFactor),
+                                         map);
+       }
+
+       if (raid->spanDepth == 1) {
+               span = 0;
+               *pdBlock = row << raid->stripeShift;
+       } else {
+               span = (u8)MR_GetSpanBlock(ld, row, pdBlock, map, &error_code);
+               if (error_code == 1)
+                       return FALSE;
+       }
+
+       /* Get the array on which this span is present */
+       arRef       = MR_LdSpanArrayGet(ld, span, map);
+       pd          = MR_ArPdGet(arRef, physArm, map); /* Get the pd */
+
+       if (pd != MR_PD_INVALID)
+               /* Get dev handle from Pd. */
+               *pDevHandle = MR_PdDevHandleGet(pd, map);
+       else {
+               *pDevHandle = MR_PD_INVALID; /* set dev handle as invalid. */
+               if (raid->level >= 5)
+                       pRAID_Context->regLockFlags = REGION_TYPE_EXCLUSIVE;
+               else if (raid->level == 1) {
+                       /* Get alternate Pd. */
+                       pd = MR_ArPdGet(arRef, physArm + 1, map);
+                       if (pd != MR_PD_INVALID)
+                               /* Get dev handle from Pd */
+                               *pDevHandle = MR_PdDevHandleGet(pd, map);
+               }
+               retval = FALSE;
+       }
+
+       *pdBlock += stripRef + MR_LdSpanPtrGet(ld, span, map)->startBlk;
+       pRAID_Context->spanArm = (span << RAID_CTX_SPANARM_SPAN_SHIFT) |
+               physArm;
+       return retval;
+}
+
+/*
+******************************************************************************
+*
+* MR_BuildRaidContext function
+*
+* This function will initiate command processing.  The start/end row and strip
+* information is calculated then the lock is acquired.
+* This function will return 0 if region lock was acquired OR return num strips
+*/
+u8
+MR_BuildRaidContext(struct IO_REQUEST_INFO *io_info,
+                   struct RAID_CONTEXT *pRAID_Context,
+                   struct MR_FW_RAID_MAP_ALL *map)
+{
+       struct MR_LD_RAID  *raid;
+       u32         ld, stripSize, stripe_mask;
+       u64         endLba, endStrip, endRow, start_row, start_strip;
+       u64         regStart;
+       u32         regSize;
+       u8          num_strips, numRows;
+       u16         ref_in_start_stripe, ref_in_end_stripe;
+       u64         ldStartBlock;
+       u32         numBlocks, ldTgtId;
+       u8          isRead;
+       u8          retval = 0;
+
+       ldStartBlock = io_info->ldStartBlock;
+       numBlocks = io_info->numBlocks;
+       ldTgtId = io_info->ldTgtId;
+       isRead = io_info->isRead;
+
+       ld = MR_TargetIdToLdGet(ldTgtId, map);
+       raid = MR_LdRaidGet(ld, map);
+
+       stripSize = 1 << raid->stripeShift;
+       stripe_mask = stripSize-1;
+       /*
+        * calculate starting row and stripe, and number of strips and rows
+        */
+       start_strip         = ldStartBlock >> raid->stripeShift;
+       ref_in_start_stripe = (u16)(ldStartBlock & stripe_mask);
+       endLba              = ldStartBlock + numBlocks - 1;
+       ref_in_end_stripe   = (u16)(endLba & stripe_mask);
+       endStrip            = endLba >> raid->stripeShift;
+       num_strips          = (u8)(endStrip - start_strip + 1); /* End strip */
+       if (raid->rowDataSize == 0)
+               return FALSE;
+       start_row           =  mega_div64_32(start_strip, raid->rowDataSize);
+       endRow              =  mega_div64_32(endStrip, raid->rowDataSize);
+       numRows             = (u8)(endRow - start_row + 1);
+
+       /*
+        * calculate region info.
+        */
+
+       /* assume region is at the start of the first row */
+       regStart            = start_row << raid->stripeShift;
+       /* assume this IO needs the full row - we'll adjust if not true */
+       regSize             = stripSize;
+
+       /* If IO spans more than 1 strip, fp is not possible
+          FP is not possible for writes on non-0 raid levels
+          FP is not possible if LD is not capable */
+       if (num_strips > 1 || (!isRead && raid->level != 0) ||
+           !raid->capability.fpCapable) {
+               io_info->fpOkForIo = FALSE;
+       } else {
+               io_info->fpOkForIo = TRUE;
+       }
+
+       if (numRows == 1) {
+               /* single-strip IOs can always lock only the data needed */
+               if (num_strips == 1) {
+                       regStart += ref_in_start_stripe;
+                       regSize = numBlocks;
+               }
+               /* multi-strip IOs always need to full stripe locked */
+       } else {
+               if (start_strip == (start_row + 1) * raid->rowDataSize - 1) {
+                       /* If the start strip is the last in the start row */
+                       regStart += ref_in_start_stripe;
+                       regSize = stripSize - ref_in_start_stripe;
+                       /* initialize count to sectors from startref to end
+                          of strip */
+               }
+
+               if (numRows > 2)
+                       /* Add complete rows in the middle of the transfer */
+                       regSize += (numRows-2) << raid->stripeShift;
+
+               /* if IO ends within first strip of last row */
+               if (endStrip == endRow*raid->rowDataSize)
+                       regSize += ref_in_end_stripe+1;
+               else
+                       regSize += stripSize;
+       }
+
+       pRAID_Context->timeoutValue     = map->raidMap.fpPdIoTimeoutSec;
+       pRAID_Context->regLockFlags     = (isRead) ? REGION_TYPE_SHARED_READ :
+               raid->regTypeReqOnWrite;
+       pRAID_Context->VirtualDiskTgtId = raid->targetId;
+       pRAID_Context->regLockRowLBA    = regStart;
+       pRAID_Context->regLockLength    = regSize;
+       pRAID_Context->configSeqNum     = raid->seqNum;
+
+       /*Get Phy Params only if FP capable, or else leave it to MR firmware
+         to do the calculation.*/
+       if (io_info->fpOkForIo) {
+               retval = MR_GetPhyParams(ld, start_strip, ref_in_start_stripe,
+                                        &io_info->pdBlock,
+                                        &io_info->devHandle, pRAID_Context,
+                                        map);
+               /* If IO on an invalid Pd, then FP i snot possible */
+               if (io_info->devHandle == MR_PD_INVALID)
+                       io_info->fpOkForIo = FALSE;
+               return retval;
+       } else if (isRead) {
+               uint stripIdx;
+               for (stripIdx = 0; stripIdx < num_strips; stripIdx++) {
+                       if (!MR_GetPhyParams(ld, start_strip + stripIdx,
+                                            ref_in_start_stripe,
+                                            &io_info->pdBlock,
+                                            &io_info->devHandle,
+                                            pRAID_Context, map))
+                               return TRUE;
+               }
+       }
+       return TRUE;
+}
+
+void
+mr_update_load_balance_params(struct MR_FW_RAID_MAP_ALL *map,
+                             struct LD_LOAD_BALANCE_INFO *lbInfo)
+{
+       int ldCount;
+       u16 ld;
+       struct MR_LD_RAID *raid;
+
+       for (ldCount = 0; ldCount < MAX_LOGICAL_DRIVES; ldCount++) {
+               ld = MR_TargetIdToLdGet(ldCount, map);
+               if (ld >= MAX_LOGICAL_DRIVES) {
+                       lbInfo[ldCount].loadBalanceFlag = 0;
+                       continue;
+               }
+
+               raid = MR_LdRaidGet(ld, map);
+
+               /* Two drive Optimal RAID 1 */
+               if ((raid->level == 1)  &&  (raid->rowSize == 2) &&
+                   (raid->spanDepth == 1) && raid->ldState ==
+                   MR_LD_STATE_OPTIMAL) {
+                       u32 pd, arRef;
+
+                       lbInfo[ldCount].loadBalanceFlag = 1;
+
+                       /* Get the array on which this span is present */
+                       arRef = MR_LdSpanArrayGet(ld, 0, map);
+
+                       /* Get the Pd */
+                       pd = MR_ArPdGet(arRef, 0, map);
+                       /* Get dev handle from Pd */
+                       lbInfo[ldCount].raid1DevHandle[0] =
+                               MR_PdDevHandleGet(pd, map);
+                       /* Get the Pd */
+                       pd = MR_ArPdGet(arRef, 1, map);
+
+                       /* Get the dev handle from Pd */
+                       lbInfo[ldCount].raid1DevHandle[1] =
+                               MR_PdDevHandleGet(pd, map);
+               } else
+                       lbInfo[ldCount].loadBalanceFlag = 0;
+       }
+}
+
+u8 megasas_get_best_arm(struct LD_LOAD_BALANCE_INFO *lbInfo, u8 arm, u64 block,
+                       u32 count)
+{
+       u16     pend0, pend1;
+       u64     diff0, diff1;
+       u8      bestArm;
+
+       /* get the pending cmds for the data and mirror arms */
+       pend0 = atomic_read(&lbInfo->scsi_pending_cmds[0]);
+       pend1 = atomic_read(&lbInfo->scsi_pending_cmds[1]);
+
+       /* Determine the disk whose head is nearer to the req. block */
+       diff0 = ABS_DIFF(block, lbInfo->last_accessed_block[0]);
+       diff1 = ABS_DIFF(block, lbInfo->last_accessed_block[1]);
+       bestArm = (diff0 <= diff1 ? 0 : 1);
+
+       if ((bestArm == arm && pend0 > pend1 + 16)  ||
+           (bestArm != arm && pend1 > pend0 + 16))
+               bestArm ^= 1;
+
+       /* Update the last accessed block on the correct pd */
+       lbInfo->last_accessed_block[bestArm] = block + count - 1;
+
+       return bestArm;
+}
+
+u16 get_updated_dev_handle(struct LD_LOAD_BALANCE_INFO *lbInfo,
+                          struct IO_REQUEST_INFO *io_info)
+{
+       u8 arm, old_arm;
+       u16 devHandle;
+
+       old_arm = lbInfo->raid1DevHandle[0] == io_info->devHandle ? 0 : 1;
+
+       /* get best new arm */
+       arm  = megasas_get_best_arm(lbInfo, old_arm, io_info->ldStartBlock,
+                                   io_info->numBlocks);
+       devHandle = lbInfo->raid1DevHandle[arm];
+       atomic_inc(&lbInfo->scsi_pending_cmds[arm]);
+
+       return devHandle;
+}
diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c
new file mode 100644 (file)
index 0000000..c1e09d5
--- /dev/null
@@ -0,0 +1,2248 @@
+/*
+ *  Linux MegaRAID driver for SAS based RAID controllers
+ *
+ *  Copyright (c) 2009-2011  LSI Corporation.
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version 2
+ *  of the License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ *  FILE: megaraid_sas_fusion.c
+ *
+ *  Authors: LSI Corporation
+ *           Sumant Patro
+ *           Adam Radford <linuxraid@lsi.com>
+ *
+ *  Send feedback to: <megaraidlinux@lsi.com>
+ *
+ *  Mail to: LSI Corporation, 1621 Barber Lane, Milpitas, CA 95035
+ *     ATTN: Linuxraid
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/list.h>
+#include <linux/moduleparam.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/smp_lock.h>
+#include <linux/uio.h>
+#include <linux/uaccess.h>
+#include <linux/fs.h>
+#include <linux/compat.h>
+#include <linux/blkdev.h>
+#include <linux/mutex.h>
+#include <linux/poll.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_host.h>
+
+#include "megaraid_sas_fusion.h"
+#include "megaraid_sas.h"
+
+extern void megasas_free_cmds(struct megasas_instance *instance);
+extern struct megasas_cmd *megasas_get_cmd(struct megasas_instance
+                                          *instance);
+extern void
+megasas_complete_cmd(struct megasas_instance *instance,
+                    struct megasas_cmd *cmd, u8 alt_status);
+int megasas_is_ldio(struct scsi_cmnd *cmd);
+int
+wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd);
+
+void
+megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd);
+int megasas_alloc_cmds(struct megasas_instance *instance);
+int
+megasas_clear_intr_fusion(struct megasas_register_set __iomem *regs);
+int
+megasas_issue_polled(struct megasas_instance *instance,
+                    struct megasas_cmd *cmd);
+
+u8
+MR_BuildRaidContext(struct IO_REQUEST_INFO *io_info,
+                   struct RAID_CONTEXT *pRAID_Context,
+                   struct MR_FW_RAID_MAP_ALL *map);
+u16 MR_TargetIdToLdGet(u32 ldTgtId, struct MR_FW_RAID_MAP_ALL *map);
+struct MR_LD_RAID *MR_LdRaidGet(u32 ld, struct MR_FW_RAID_MAP_ALL *map);
+
+u16 MR_GetLDTgtId(u32 ld, struct MR_FW_RAID_MAP_ALL *map);
+u8 MR_ValidateMapInfo(struct MR_FW_RAID_MAP_ALL *map,
+                     struct LD_LOAD_BALANCE_INFO *lbInfo);
+u16 get_updated_dev_handle(struct LD_LOAD_BALANCE_INFO *lbInfo,
+                          struct IO_REQUEST_INFO *in_info);
+int megasas_transition_to_ready(struct megasas_instance *instance);
+void megaraid_sas_kill_hba(struct megasas_instance *instance);
+
+extern u32 megasas_dbg_lvl;
+
+/**
+ * megasas_enable_intr_fusion -        Enables interrupts
+ * @regs:                      MFI register set
+ */
+void
+megasas_enable_intr_fusion(struct megasas_register_set __iomem *regs)
+{
+       writel(~MFI_FUSION_ENABLE_INTERRUPT_MASK, &(regs)->outbound_intr_mask);
+
+       /* Dummy readl to force pci flush */
+       readl(&regs->outbound_intr_mask);
+}
+
+/**
+ * megasas_disable_intr_fusion - Disables interrupt
+ * @regs:                       MFI register set
+ */
+void
+megasas_disable_intr_fusion(struct megasas_register_set __iomem *regs)
+{
+       u32 mask = 0xFFFFFFFF;
+       u32 status;
+
+       writel(mask, &regs->outbound_intr_mask);
+       /* Dummy readl to force pci flush */
+       status = readl(&regs->outbound_intr_mask);
+}
+
+int
+megasas_clear_intr_fusion(struct megasas_register_set __iomem *regs)
+{
+       u32 status;
+       /*
+        * Check if it is our interrupt
+        */
+       status = readl(&regs->outbound_intr_status);
+
+       if (status & 1) {
+               writel(status, &regs->outbound_intr_status);
+               readl(&regs->outbound_intr_status);
+               return 1;
+       }
+       if (!(status & MFI_FUSION_ENABLE_INTERRUPT_MASK))
+               return 0;
+
+       /*
+        * dummy read to flush PCI
+        */
+       readl(&regs->outbound_intr_status);
+
+       return 1;
+}
+
+/**
+ * megasas_get_cmd_fusion -    Get a command from the free pool
+ * @instance:          Adapter soft state
+ *
+ * Returns a free command from the pool
+ */
+struct megasas_cmd_fusion *megasas_get_cmd_fusion(struct megasas_instance
+                                                 *instance)
+{
+       unsigned long flags;
+       struct fusion_context *fusion =
+               (struct fusion_context *)instance->ctrl_context;
+       struct megasas_cmd_fusion *cmd = NULL;
+
+       spin_lock_irqsave(&fusion->cmd_pool_lock, flags);
+
+       if (!list_empty(&fusion->cmd_pool)) {
+               cmd = list_entry((&fusion->cmd_pool)->next,
+                                struct megasas_cmd_fusion, list);
+               list_del_init(&cmd->list);
+       } else {
+               printk(KERN_ERR "megasas: Command pool (fusion) empty!\n");
+       }
+
+       spin_unlock_irqrestore(&fusion->cmd_pool_lock, flags);
+       return cmd;
+}
+
+/**
+ * megasas_return_cmd_fusion - Return a cmd to free command pool
+ * @instance:          Adapter soft state
+ * @cmd:               Command packet to be returned to free command pool
+ */
+static inline void
+megasas_return_cmd_fusion(struct megasas_instance *instance,
+                         struct megasas_cmd_fusion *cmd)
+{
+       unsigned long flags;
+       struct fusion_context *fusion =
+               (struct fusion_context *)instance->ctrl_context;
+
+       spin_lock_irqsave(&fusion->cmd_pool_lock, flags);
+
+       cmd->scmd = NULL;
+       cmd->sync_cmd_idx = (u32)ULONG_MAX;
+       list_add_tail(&cmd->list, &fusion->cmd_pool);
+
+       spin_unlock_irqrestore(&fusion->cmd_pool_lock, flags);
+}
+
+/**
+ * megasas_teardown_frame_pool_fusion -        Destroy the cmd frame DMA pool
+ * @instance:                          Adapter soft state
+ */
+static void megasas_teardown_frame_pool_fusion(
+       struct megasas_instance *instance)
+{
+       int i;
+       struct fusion_context *fusion = instance->ctrl_context;
+
+       u16 max_cmd = instance->max_fw_cmds;
+
+       struct megasas_cmd_fusion *cmd;
+
+       if (!fusion->sg_dma_pool || !fusion->sense_dma_pool) {
+               printk(KERN_ERR "megasas: dma pool is null. SG Pool %p, "
+                      "sense pool : %p\n", fusion->sg_dma_pool,
+                      fusion->sense_dma_pool);
+               return;
+       }
+
+       /*
+        * Return all frames to pool
+        */
+       for (i = 0; i < max_cmd; i++) {
+
+               cmd = fusion->cmd_list[i];
+
+               if (cmd->sg_frame)
+                       pci_pool_free(fusion->sg_dma_pool, cmd->sg_frame,
+                                     cmd->sg_frame_phys_addr);
+
+               if (cmd->sense)
+                       pci_pool_free(fusion->sense_dma_pool, cmd->sense,
+                                     cmd->sense_phys_addr);
+       }
+
+       /*
+        * Now destroy the pool itself
+        */
+       pci_pool_destroy(fusion->sg_dma_pool);
+       pci_pool_destroy(fusion->sense_dma_pool);
+
+       fusion->sg_dma_pool = NULL;
+       fusion->sense_dma_pool = NULL;
+}
+
+/**
+ * megasas_free_cmds_fusion -  Free all the cmds in the free cmd pool
+ * @instance:          Adapter soft state
+ */
+void
+megasas_free_cmds_fusion(struct megasas_instance *instance)
+{
+       int i;
+       struct fusion_context *fusion = instance->ctrl_context;
+
+       u32 max_cmds, req_sz, reply_sz, io_frames_sz;
+
+
+       req_sz = fusion->request_alloc_sz;
+       reply_sz = fusion->reply_alloc_sz;
+       io_frames_sz = fusion->io_frames_alloc_sz;
+
+       max_cmds = instance->max_fw_cmds;
+
+       /* Free descriptors and request Frames memory */
+       if (fusion->req_frames_desc)
+               dma_free_coherent(&instance->pdev->dev, req_sz,
+                                 fusion->req_frames_desc,
+                                 fusion->req_frames_desc_phys);
+
+       if (fusion->reply_frames_desc) {
+               pci_pool_free(fusion->reply_frames_desc_pool,
+                             fusion->reply_frames_desc,
+                             fusion->reply_frames_desc_phys);
+               pci_pool_destroy(fusion->reply_frames_desc_pool);
+       }
+
+       if (fusion->io_request_frames) {
+               pci_pool_free(fusion->io_request_frames_pool,
+                             fusion->io_request_frames,
+                             fusion->io_request_frames_phys);
+               pci_pool_destroy(fusion->io_request_frames_pool);
+       }
+
+       /* Free the Fusion frame pool */
+       megasas_teardown_frame_pool_fusion(instance);
+
+       /* Free all the commands in the cmd_list */
+       for (i = 0; i < max_cmds; i++)
+               kfree(fusion->cmd_list[i]);
+
+       /* Free the cmd_list buffer itself */
+       kfree(fusion->cmd_list);
+       fusion->cmd_list = NULL;
+
+       INIT_LIST_HEAD(&fusion->cmd_pool);
+}
+
+/**
+ * megasas_create_frame_pool_fusion -  Creates DMA pool for cmd frames
+ * @instance:                  Adapter soft state
+ *
+ */
+static int megasas_create_frame_pool_fusion(struct megasas_instance *instance)
+{
+       int i;
+       u32 max_cmd;
+       struct fusion_context *fusion;
+       struct megasas_cmd_fusion *cmd;
+       u32 total_sz_chain_frame;
+
+       fusion = instance->ctrl_context;
+       max_cmd = instance->max_fw_cmds;
+
+       total_sz_chain_frame = MEGASAS_MAX_SZ_CHAIN_FRAME;
+
+       /*
+        * Use DMA pool facility provided by PCI layer
+        */
+
+       fusion->sg_dma_pool = pci_pool_create("megasas sg pool fusion",
+                                             instance->pdev,
+                                             total_sz_chain_frame, 4,
+                                             0);
+       if (!fusion->sg_dma_pool) {
+               printk(KERN_DEBUG "megasas: failed to setup request pool "
+                      "fusion\n");
+               return -ENOMEM;
+       }
+       fusion->sense_dma_pool = pci_pool_create("megasas sense pool fusion",
+                                                instance->pdev,
+                                                SCSI_SENSE_BUFFERSIZE, 64, 0);
+
+       if (!fusion->sense_dma_pool) {
+               printk(KERN_DEBUG "megasas: failed to setup sense pool "
+                      "fusion\n");
+               pci_pool_destroy(fusion->sg_dma_pool);
+               fusion->sg_dma_pool = NULL;
+               return -ENOMEM;
+       }
+
+       /*
+        * Allocate and attach a frame to each of the commands in cmd_list
+        */
+       for (i = 0; i < max_cmd; i++) {
+
+               cmd = fusion->cmd_list[i];
+
+               cmd->sg_frame = pci_pool_alloc(fusion->sg_dma_pool,
+                                              GFP_KERNEL,
+                                              &cmd->sg_frame_phys_addr);
+
+               cmd->sense = pci_pool_alloc(fusion->sense_dma_pool,
+                                           GFP_KERNEL, &cmd->sense_phys_addr);
+               /*
+                * megasas_teardown_frame_pool_fusion() takes care of freeing
+                * whatever has been allocated
+                */
+               if (!cmd->sg_frame || !cmd->sense) {
+                       printk(KERN_DEBUG "megasas: pci_pool_alloc failed\n");
+                       megasas_teardown_frame_pool_fusion(instance);
+                       return -ENOMEM;
+               }
+       }
+       return 0;
+}
+
+/**
+ * megasas_alloc_cmds_fusion - Allocates the command packets
+ * @instance:          Adapter soft state
+ *
+ *
+ * Each frame has a 32-bit field called context. This context is used to get
+ * back the megasas_cmd_fusion from the frame when a frame gets completed
+ * In this driver, the 32 bit values are the indices into an array cmd_list.
+ * This array is used only to look up the megasas_cmd_fusion given the context.
+ * The free commands themselves are maintained in a linked list called cmd_pool.
+ *
+ * cmds are formed in the io_request and sg_frame members of the
+ * megasas_cmd_fusion. The context field is used to get a request descriptor
+ * and is used as SMID of the cmd.
+ * SMID value range is from 1 to max_fw_cmds.
+ */
+int
+megasas_alloc_cmds_fusion(struct megasas_instance *instance)
+{
+       int i, j;
+       u32 max_cmd, io_frames_sz;
+       struct fusion_context *fusion;
+       struct megasas_cmd_fusion *cmd;
+       union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc;
+       u32 offset;
+       dma_addr_t io_req_base_phys;
+       u8 *io_req_base;
+
+       fusion = instance->ctrl_context;
+
+       max_cmd = instance->max_fw_cmds;
+
+       fusion->req_frames_desc =
+               dma_alloc_coherent(&instance->pdev->dev,
+                                  fusion->request_alloc_sz,
+                                  &fusion->req_frames_desc_phys, GFP_KERNEL);
+
+       if (!fusion->req_frames_desc) {
+               printk(KERN_ERR "megasas; Could not allocate memory for "
+                      "request_frames\n");
+               goto fail_req_desc;
+       }
+
+       fusion->reply_frames_desc_pool =
+               pci_pool_create("reply_frames pool", instance->pdev,
+                               fusion->reply_alloc_sz, 16, 0);
+
+       if (!fusion->reply_frames_desc_pool) {
+               printk(KERN_ERR "megasas; Could not allocate memory for "
+                      "reply_frame pool\n");
+               goto fail_reply_desc;
+       }
+
+       fusion->reply_frames_desc =
+               pci_pool_alloc(fusion->reply_frames_desc_pool, GFP_KERNEL,
+                              &fusion->reply_frames_desc_phys);
+       if (!fusion->reply_frames_desc) {
+               printk(KERN_ERR "megasas; Could not allocate memory for "
+                      "reply_frame pool\n");
+               pci_pool_destroy(fusion->reply_frames_desc_pool);
+               goto fail_reply_desc;
+       }
+
+       reply_desc = fusion->reply_frames_desc;
+       for (i = 0; i < fusion->reply_q_depth; i++, reply_desc++)
+               reply_desc->Words = ULLONG_MAX;
+
+       io_frames_sz = fusion->io_frames_alloc_sz;
+
+       fusion->io_request_frames_pool =
+               pci_pool_create("io_request_frames pool", instance->pdev,
+                               fusion->io_frames_alloc_sz, 16, 0);
+
+       if (!fusion->io_request_frames_pool) {
+               printk(KERN_ERR "megasas: Could not allocate memory for "
+                      "io_request_frame pool\n");
+               goto fail_io_frames;
+       }
+
+       fusion->io_request_frames =
+               pci_pool_alloc(fusion->io_request_frames_pool, GFP_KERNEL,
+                              &fusion->io_request_frames_phys);
+       if (!fusion->io_request_frames) {
+               printk(KERN_ERR "megasas: Could not allocate memory for "
+                      "io_request_frames frames\n");
+               pci_pool_destroy(fusion->io_request_frames_pool);
+               goto fail_io_frames;
+       }
+
+       /*
+        * fusion->cmd_list is an array of struct megasas_cmd_fusion pointers.
+        * Allocate the dynamic array first and then allocate individual
+        * commands.
+        */
+       fusion->cmd_list = kmalloc(sizeof(struct megasas_cmd_fusion *)
+                                  *max_cmd, GFP_KERNEL);
+
+       if (!fusion->cmd_list) {
+               printk(KERN_DEBUG "megasas: out of memory. Could not alloc "
+                      "memory for cmd_list_fusion\n");
+               goto fail_cmd_list;
+       }
+
+       memset(fusion->cmd_list, 0, sizeof(struct megasas_cmd_fusion *)
+              *max_cmd);
+
+       max_cmd = instance->max_fw_cmds;
+       for (i = 0; i < max_cmd; i++) {
+               fusion->cmd_list[i] = kmalloc(sizeof(struct megasas_cmd_fusion),
+                                             GFP_KERNEL);
+               if (!fusion->cmd_list[i]) {
+                       printk(KERN_ERR "Could not alloc cmd list fusion\n");
+
+                       for (j = 0; j < i; j++)
+                               kfree(fusion->cmd_list[j]);
+
+                       kfree(fusion->cmd_list);
+                       fusion->cmd_list = NULL;
+                       goto fail_cmd_list;
+               }
+       }
+
+       /* The first 256 bytes (SMID 0) is not used. Don't add to cmd list */
+       io_req_base = fusion->io_request_frames +
+               MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE;
+       io_req_base_phys = fusion->io_request_frames_phys +
+               MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE;
+
+       /*
+        * Add all the commands to command pool (fusion->cmd_pool)
+        */
+
+       /* SMID 0 is reserved. Set SMID/index from 1 */
+       for (i = 0; i < max_cmd; i++) {
+               cmd = fusion->cmd_list[i];
+               offset = MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE * i;
+               memset(cmd, 0, sizeof(struct megasas_cmd_fusion));
+               cmd->index = i + 1;
+               cmd->scmd = NULL;
+               cmd->sync_cmd_idx = (u32)ULONG_MAX; /* Set to Invalid */
+               cmd->instance = instance;
+               cmd->io_request =
+                       (struct MPI2_RAID_SCSI_IO_REQUEST *)
+                 (io_req_base + offset);
+               memset(cmd->io_request, 0,
+                      sizeof(struct MPI2_RAID_SCSI_IO_REQUEST));
+               cmd->io_request_phys_addr = io_req_base_phys + offset;
+
+               list_add_tail(&cmd->list, &fusion->cmd_pool);
+       }
+
+       /*
+        * Create a frame pool and assign one frame to each cmd
+        */
+       if (megasas_create_frame_pool_fusion(instance)) {
+               printk(KERN_DEBUG "megasas: Error creating frame DMA pool\n");
+               megasas_free_cmds_fusion(instance);
+               goto fail_req_desc;
+       }
+
+       return 0;
+
+fail_cmd_list:
+       pci_pool_free(fusion->io_request_frames_pool, fusion->io_request_frames,
+                     fusion->io_request_frames_phys);
+       pci_pool_destroy(fusion->io_request_frames_pool);
+fail_io_frames:
+       dma_free_coherent(&instance->pdev->dev, fusion->request_alloc_sz,
+                         fusion->reply_frames_desc,
+                         fusion->reply_frames_desc_phys);
+       pci_pool_free(fusion->reply_frames_desc_pool,
+                     fusion->reply_frames_desc,
+                     fusion->reply_frames_desc_phys);
+       pci_pool_destroy(fusion->reply_frames_desc_pool);
+
+fail_reply_desc:
+       dma_free_coherent(&instance->pdev->dev, fusion->request_alloc_sz,
+                         fusion->req_frames_desc,
+                         fusion->req_frames_desc_phys);
+fail_req_desc:
+       return -ENOMEM;
+}
+
+/**
+ * wait_and_poll -     Issues a polling command
+ * @instance:                  Adapter soft state
+ * @cmd:                       Command packet to be issued
+ *
+ * For polling, MFI requires the cmd_status to be set to 0xFF before posting.
+ */
+int
+wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd)
+{
+       int i;
+       struct megasas_header *frame_hdr = &cmd->frame->hdr;
+
+       u32 msecs = MFI_POLL_TIMEOUT_SECS * 1000;
+
+       /*
+        * Wait for cmd_status to change
+        */
+       for (i = 0; (i < msecs) && (frame_hdr->cmd_status == 0xff); i += 20) {
+               rmb();
+               msleep(20);
+       }
+
+       if (frame_hdr->cmd_status == 0xff)
+               return -ETIME;
+
+       return 0;
+}
+
+/**
+ * megasas_ioc_init_fusion -   Initializes the FW
+ * @instance:          Adapter soft state
+ *
+ * Issues the IOC Init cmd
+ */
+int
+megasas_ioc_init_fusion(struct megasas_instance *instance)
+{
+       struct megasas_init_frame *init_frame;
+       struct MPI2_IOC_INIT_REQUEST *IOCInitMessage;
+       dma_addr_t      ioc_init_handle;
+       u32 context;
+       struct megasas_cmd *cmd;
+       u8 ret;
+       struct fusion_context *fusion;
+       union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
+       int i;
+       struct megasas_header *frame_hdr;
+
+       fusion = instance->ctrl_context;
+
+       cmd = megasas_get_cmd(instance);
+
+       if (!cmd) {
+               printk(KERN_ERR "Could not allocate cmd for INIT Frame\n");
+               ret = 1;
+               goto fail_get_cmd;
+       }
+
+       IOCInitMessage =
+         dma_alloc_coherent(&instance->pdev->dev,
+                            sizeof(struct MPI2_IOC_INIT_REQUEST),
+                            &ioc_init_handle, GFP_KERNEL);
+
+       if (!IOCInitMessage) {
+               printk(KERN_ERR "Could not allocate memory for "
+                      "IOCInitMessage\n");
+               ret = 1;
+               goto fail_fw_init;
+       }
+
+       memset(IOCInitMessage, 0, sizeof(struct MPI2_IOC_INIT_REQUEST));
+
+       IOCInitMessage->Function = MPI2_FUNCTION_IOC_INIT;
+       IOCInitMessage->WhoInit = MPI2_WHOINIT_HOST_DRIVER;
+       IOCInitMessage->MsgVersion = MPI2_VERSION;
+       IOCInitMessage->HeaderVersion = MPI2_HEADER_VERSION;
+       IOCInitMessage->SystemRequestFrameSize =
+               MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE / 4;
+
+       IOCInitMessage->ReplyDescriptorPostQueueDepth = fusion->reply_q_depth;
+       IOCInitMessage->ReplyDescriptorPostQueueAddress =
+               fusion->reply_frames_desc_phys;
+       IOCInitMessage->SystemRequestFrameBaseAddress =
+               fusion->io_request_frames_phys;
+
+       init_frame = (struct megasas_init_frame *)cmd->frame;
+       memset(init_frame, 0, MEGAMFI_FRAME_SIZE);
+
+       frame_hdr = &cmd->frame->hdr;
+       context = init_frame->context;
+       init_frame->context = context;
+
+       frame_hdr->cmd_status = 0xFF;
+       frame_hdr->flags |= MFI_FRAME_DONT_POST_IN_REPLY_QUEUE;
+
+       init_frame->cmd = MFI_CMD_INIT;
+       init_frame->cmd_status = 0xFF;
+
+       init_frame->queue_info_new_phys_addr_lo = ioc_init_handle;
+       init_frame->data_xfer_len = sizeof(struct MPI2_IOC_INIT_REQUEST);
+
+       req_desc =
+         (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)fusion->req_frames_desc;
+
+       req_desc->Words = cmd->frame_phys_addr;
+       req_desc->MFAIo.RequestFlags =
+               (MEGASAS_REQ_DESCRIPT_FLAGS_MFA <<
+                MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
+
+       /*
+        * disable the intr before firing the init frame
+        */
+       instance->instancet->disable_intr(instance->reg_set);
+
+       for (i = 0; i < (10 * 1000); i += 20) {
+               if (readl(&instance->reg_set->doorbell) & 1)
+                       msleep(20);
+               else
+                       break;
+       }
+
+       instance->instancet->fire_cmd(instance, req_desc->u.low,
+                                     req_desc->u.high, instance->reg_set);
+
+       wait_and_poll(instance, cmd);
+
+       frame_hdr = &cmd->frame->hdr;
+       if (frame_hdr->cmd_status != 0) {
+               ret = 1;
+               goto fail_fw_init;
+       }
+       printk(KERN_ERR "megasas:IOC Init cmd success\n");
+
+       ret = 0;
+
+fail_fw_init:
+       megasas_return_cmd(instance, cmd);
+       if (IOCInitMessage)
+               dma_free_coherent(&instance->pdev->dev,
+                                 sizeof(struct MPI2_IOC_INIT_REQUEST),
+                                 IOCInitMessage, ioc_init_handle);
+fail_get_cmd:
+       return ret;
+}
+
+/*
+ * megasas_return_cmd_for_smid -       Returns a cmd_fusion for a SMID
+ * @instance:                          Adapter soft state
+ *
+ */
+void
+megasas_return_cmd_for_smid(struct megasas_instance *instance, u16 smid)
+{
+       struct fusion_context *fusion;
+       struct megasas_cmd_fusion *cmd;
+
+       fusion = instance->ctrl_context;
+       cmd = fusion->cmd_list[smid - 1];
+       megasas_return_cmd_fusion(instance, cmd);
+}
+
+/*
+ * megasas_get_ld_map_info -   Returns FW's ld_map structure
+ * @instance:                          Adapter soft state
+ * @pend:                              Pend the command or not
+ * Issues an internal command (DCMD) to get the FW's controller PD
+ * list structure.  This information is mainly used to find out SYSTEM
+ * supported by the FW.
+ */
+static int
+megasas_get_ld_map_info(struct megasas_instance *instance)
+{
+       int ret = 0;
+       struct megasas_cmd *cmd;
+       struct megasas_dcmd_frame *dcmd;
+       struct MR_FW_RAID_MAP_ALL *ci;
+       dma_addr_t ci_h = 0;
+       u32 size_map_info;
+       struct fusion_context *fusion;
+
+       cmd = megasas_get_cmd(instance);
+
+       if (!cmd) {
+               printk(KERN_DEBUG "megasas: Failed to get cmd for map info.\n");
+               return -ENOMEM;
+       }
+
+       fusion = instance->ctrl_context;
+
+       if (!fusion) {
+               megasas_return_cmd(instance, cmd);
+               return 1;
+       }
+
+       dcmd = &cmd->frame->dcmd;
+
+       size_map_info = sizeof(struct MR_FW_RAID_MAP) +
+               (sizeof(struct MR_LD_SPAN_MAP) *(MAX_LOGICAL_DRIVES - 1));
+
+       ci = fusion->ld_map[(instance->map_id & 1)];
+       ci_h = fusion->ld_map_phys[(instance->map_id & 1)];
+
+       if (!ci) {
+               printk(KERN_DEBUG "Failed to alloc mem for ld_map_info\n");
+               megasas_return_cmd(instance, cmd);
+               return -ENOMEM;
+       }
+
+       memset(ci, 0, sizeof(*ci));
+       memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
+
+       dcmd->cmd = MFI_CMD_DCMD;
+       dcmd->cmd_status = 0xFF;
+       dcmd->sge_count = 1;
+       dcmd->flags = MFI_FRAME_DIR_READ;
+       dcmd->timeout = 0;
+       dcmd->pad_0 = 0;
+       dcmd->data_xfer_len = size_map_info;
+       dcmd->opcode = MR_DCMD_LD_MAP_GET_INFO;
+       dcmd->sgl.sge32[0].phys_addr = ci_h;
+       dcmd->sgl.sge32[0].length = size_map_info;
+
+       if (!megasas_issue_polled(instance, cmd))
+               ret = 0;
+       else {
+               printk(KERN_ERR "megasas: Get LD Map Info Failed\n");
+               ret = -1;
+       }
+
+       megasas_return_cmd(instance, cmd);
+
+       return ret;
+}
+
+u8
+megasas_get_map_info(struct megasas_instance *instance)
+{
+       struct fusion_context *fusion = instance->ctrl_context;
+
+       fusion->fast_path_io = 0;
+       if (!megasas_get_ld_map_info(instance)) {
+               if (MR_ValidateMapInfo(fusion->ld_map[(instance->map_id & 1)],
+                                      fusion->load_balance_info)) {
+                       fusion->fast_path_io = 1;
+                       return 0;
+               }
+       }
+       return 1;
+}
+
+/*
+ * megasas_sync_map_info -     Returns FW's ld_map structure
+ * @instance:                          Adapter soft state
+ *
+ * Issues an internal command (DCMD) to get the FW's controller PD
+ * list structure.  This information is mainly used to find out SYSTEM
+ * supported by the FW.
+ */
+int
+megasas_sync_map_info(struct megasas_instance *instance)
+{
+       int ret = 0, i;
+       struct megasas_cmd *cmd;
+       struct megasas_dcmd_frame *dcmd;
+       u32 size_sync_info, num_lds;
+       struct fusion_context *fusion;
+       struct MR_LD_TARGET_SYNC *ci = NULL;
+       struct MR_FW_RAID_MAP_ALL *map;
+       struct MR_LD_RAID  *raid;
+       struct MR_LD_TARGET_SYNC *ld_sync;
+       dma_addr_t ci_h = 0;
+       u32 size_map_info;
+
+       cmd = megasas_get_cmd(instance);
+
+       if (!cmd) {
+               printk(KERN_DEBUG "megasas: Failed to get cmd for sync"
+                      "info.\n");
+               return -ENOMEM;
+       }
+
+       fusion = instance->ctrl_context;
+
+       if (!fusion) {
+               megasas_return_cmd(instance, cmd);
+               return 1;
+       }
+
+       map = fusion->ld_map[instance->map_id & 1];
+
+       num_lds = map->raidMap.ldCount;
+
+       dcmd = &cmd->frame->dcmd;
+
+       size_sync_info = sizeof(struct MR_LD_TARGET_SYNC) *num_lds;
+
+       memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
+
+       ci = (struct MR_LD_TARGET_SYNC *)
+         fusion->ld_map[(instance->map_id - 1) & 1];
+       memset(ci, 0, sizeof(struct MR_FW_RAID_MAP_ALL));
+
+       ci_h = fusion->ld_map_phys[(instance->map_id - 1) & 1];
+
+       ld_sync = (struct MR_LD_TARGET_SYNC *)ci;
+
+       for (i = 0; i < num_lds; i++, ld_sync++) {
+               raid = MR_LdRaidGet(i, map);
+               ld_sync->targetId = MR_GetLDTgtId(i, map);
+               ld_sync->seqNum = raid->seqNum;
+       }
+
+       size_map_info = sizeof(struct MR_FW_RAID_MAP) +
+               (sizeof(struct MR_LD_SPAN_MAP) *(MAX_LOGICAL_DRIVES - 1));
+
+       dcmd->cmd = MFI_CMD_DCMD;
+       dcmd->cmd_status = 0xFF;
+       dcmd->sge_count = 1;
+       dcmd->flags = MFI_FRAME_DIR_WRITE;
+       dcmd->timeout = 0;
+       dcmd->pad_0 = 0;
+       dcmd->data_xfer_len = size_map_info;
+       dcmd->mbox.b[0] = num_lds;
+       dcmd->mbox.b[1] = MEGASAS_DCMD_MBOX_PEND_FLAG;
+       dcmd->opcode = MR_DCMD_LD_MAP_GET_INFO;
+       dcmd->sgl.sge32[0].phys_addr = ci_h;
+       dcmd->sgl.sge32[0].length = size_map_info;
+
+       instance->map_update_cmd = cmd;
+
+       instance->instancet->issue_dcmd(instance, cmd);
+
+       return ret;
+}
+
+/**
+ * megasas_init_adapter_fusion -       Initializes the FW
+ * @instance:          Adapter soft state
+ *
+ * This is the main function for initializing firmware.
+ */
+u32
+megasas_init_adapter_fusion(struct megasas_instance *instance)
+{
+       struct megasas_register_set __iomem *reg_set;
+       struct fusion_context *fusion;
+       u32 max_cmd;
+       int i = 0;
+
+       fusion = instance->ctrl_context;
+
+       reg_set = instance->reg_set;
+
+       /*
+        * Get various operational parameters from status register
+        */
+       instance->max_fw_cmds =
+               instance->instancet->read_fw_status_reg(reg_set) & 0x00FFFF;
+       instance->max_fw_cmds = min(instance->max_fw_cmds, (u16)1008);
+
+       /*
+        * 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;
+       /* Only internal cmds (DCMD) need to have MFI frames */
+       instance->max_mfi_cmds = MEGASAS_INT_CMDS;
+
+       max_cmd = instance->max_fw_cmds;
+
+       fusion->reply_q_depth = ((max_cmd + 1 + 15)/16)*16;
+
+       fusion->request_alloc_sz =
+               sizeof(union MEGASAS_REQUEST_DESCRIPTOR_UNION) *max_cmd;
+       fusion->reply_alloc_sz = sizeof(union MPI2_REPLY_DESCRIPTORS_UNION)
+               *(fusion->reply_q_depth);
+       fusion->io_frames_alloc_sz = MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE +
+               (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE *
+                (max_cmd + 1)); /* Extra 1 for SMID 0 */
+
+       fusion->max_sge_in_main_msg =
+         (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE -
+          offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL))/16;
+
+       fusion->max_sge_in_chain =
+               MEGASAS_MAX_SZ_CHAIN_FRAME / sizeof(union MPI2_SGE_IO_UNION);
+
+       instance->max_num_sge = fusion->max_sge_in_main_msg +
+               fusion->max_sge_in_chain - 2;
+
+       /* Used for pass thru MFI frame (DCMD) */
+       fusion->chain_offset_mfi_pthru =
+               offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL)/16;
+
+       fusion->chain_offset_io_request =
+               (MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE -
+                sizeof(union MPI2_SGE_IO_UNION))/16;
+
+       fusion->last_reply_idx = 0;
+
+       /*
+        * Allocate memory for descriptors
+        * Create a pool of commands
+        */
+       if (megasas_alloc_cmds(instance))
+               goto fail_alloc_mfi_cmds;
+       if (megasas_alloc_cmds_fusion(instance))
+               goto fail_alloc_cmds;
+
+       if (megasas_ioc_init_fusion(instance))
+               goto fail_ioc_init;
+
+       instance->flag_ieee = 1;
+
+       fusion->map_sz =  sizeof(struct MR_FW_RAID_MAP) +
+         (sizeof(struct MR_LD_SPAN_MAP) *(MAX_LOGICAL_DRIVES - 1));
+
+       fusion->fast_path_io = 0;
+
+       for (i = 0; i < 2; i++) {
+               fusion->ld_map[i] = dma_alloc_coherent(&instance->pdev->dev,
+                                                      fusion->map_sz,
+                                                      &fusion->ld_map_phys[i],
+                                                      GFP_KERNEL);
+               if (!fusion->ld_map[i]) {
+                       printk(KERN_ERR "megasas: Could not allocate memory "
+                              "for map info\n");
+                       goto fail_map_info;
+               }
+       }
+
+       if (!megasas_get_map_info(instance))
+               megasas_sync_map_info(instance);
+
+       return 0;
+
+fail_alloc_cmds:
+fail_alloc_mfi_cmds:
+fail_map_info:
+       if (i == 1)
+               dma_free_coherent(&instance->pdev->dev, fusion->map_sz,
+                                 fusion->ld_map[0], fusion->ld_map_phys[0]);
+fail_ioc_init:
+       return 1;
+}
+
+/**
+ * megasas_fire_cmd_fusion -   Sends command to the FW
+ * @frame_phys_addr :          Physical address of cmd
+ * @frame_count :              Number of frames for the command
+ * @regs :                     MFI register set
+ */
+void
+megasas_fire_cmd_fusion(struct megasas_instance *instance,
+                       dma_addr_t req_desc_lo,
+                       u32 req_desc_hi,
+                       struct megasas_register_set __iomem *regs)
+{
+       unsigned long flags;
+
+       spin_lock_irqsave(&instance->hba_lock, flags);
+
+       writel(req_desc_lo,
+              &(regs)->inbound_low_queue_port);
+       writel(req_desc_hi, &(regs)->inbound_high_queue_port);
+       spin_unlock_irqrestore(&instance->hba_lock, flags);
+}
+
+/**
+ * map_cmd_status -    Maps FW cmd status to OS cmd status
+ * @cmd :              Pointer to cmd
+ * @status :           status of cmd returned by FW
+ * @ext_status :       ext status of cmd returned by FW
+ */
+
+void
+map_cmd_status(struct megasas_cmd_fusion *cmd, u8 status, u8 ext_status)
+{
+
+       switch (status) {
+
+       case MFI_STAT_OK:
+               cmd->scmd->result = DID_OK << 16;
+               break;
+
+       case MFI_STAT_SCSI_IO_FAILED:
+       case MFI_STAT_LD_INIT_IN_PROGRESS:
+               cmd->scmd->result = (DID_ERROR << 16) | ext_status;
+               break;
+
+       case MFI_STAT_SCSI_DONE_WITH_ERROR:
+
+               cmd->scmd->result = (DID_OK << 16) | ext_status;
+               if (ext_status == SAM_STAT_CHECK_CONDITION) {
+                       memset(cmd->scmd->sense_buffer, 0,
+                              SCSI_SENSE_BUFFERSIZE);
+                       memcpy(cmd->scmd->sense_buffer, cmd->sense,
+                              SCSI_SENSE_BUFFERSIZE);
+                       cmd->scmd->result |= DRIVER_SENSE << 24;
+               }
+               break;
+
+       case MFI_STAT_LD_OFFLINE:
+       case MFI_STAT_DEVICE_NOT_FOUND:
+               cmd->scmd->result = DID_BAD_TARGET << 16;
+               break;
+
+       default:
+               printk(KERN_DEBUG "megasas: FW status %#x\n", status);
+               cmd->scmd->result = DID_ERROR << 16;
+               break;
+       }
+}
+
+/**
+ * megasas_make_sgl_fusion -   Prepares 32-bit SGL
+ * @instance:          Adapter soft state
+ * @scp:               SCSI command from the mid-layer
+ * @sgl_ptr:           SGL to be filled in
+ * @cmd:               cmd we are working on
+ *
+ * If successful, this function returns the number of SG elements.
+ */
+static int
+megasas_make_sgl_fusion(struct megasas_instance *instance,
+                       struct scsi_cmnd *scp,
+                       struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr,
+                       struct megasas_cmd_fusion *cmd)
+{
+       int i, sg_processed;
+       int sge_count, sge_idx;
+       struct scatterlist *os_sgl;
+       struct fusion_context *fusion;
+
+       fusion = instance->ctrl_context;
+
+       cmd->io_request->ChainOffset = 0;
+
+       sge_count = scsi_dma_map(scp);
+
+       BUG_ON(sge_count < 0);
+
+       if (sge_count > instance->max_num_sge || !sge_count)
+               return sge_count;
+
+       if (sge_count > fusion->max_sge_in_main_msg) {
+               /* One element to store the chain info */
+               sge_idx = fusion->max_sge_in_main_msg - 1;
+       } else
+               sge_idx = sge_count;
+
+       scsi_for_each_sg(scp, os_sgl, sge_count, i) {
+               sgl_ptr->Length = sg_dma_len(os_sgl);
+               sgl_ptr->Address = sg_dma_address(os_sgl);
+               sgl_ptr->Flags = 0;
+               sgl_ptr++;
+
+               sg_processed = i + 1;
+
+               if ((sg_processed ==  (fusion->max_sge_in_main_msg - 1)) &&
+                   (sge_count > fusion->max_sge_in_main_msg)) {
+
+                       struct MPI25_IEEE_SGE_CHAIN64 *sg_chain;
+                       cmd->io_request->ChainOffset =
+                               fusion->chain_offset_io_request;
+                       sg_chain = sgl_ptr;
+                       /* Prepare chain element */
+                       sg_chain->NextChainOffset = 0;
+                       sg_chain->Flags = (IEEE_SGE_FLAGS_CHAIN_ELEMENT |
+                                          MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR);
+                       sg_chain->Length =  (sizeof(union MPI2_SGE_IO_UNION)
+                                            *(sge_count - sg_processed));
+                       sg_chain->Address = cmd->sg_frame_phys_addr;
+
+                       sgl_ptr =
+                         (struct MPI25_IEEE_SGE_CHAIN64 *)cmd->sg_frame;
+               }
+       }
+
+       return sge_count;
+}
+
+/**
+ * megasas_set_pd_lba -        Sets PD LBA
+ * @cdb:               CDB
+ * @cdb_len:           cdb length
+ * @start_blk:         Start block of IO
+ *
+ * Used to set the PD LBA in CDB for FP IOs
+ */
+void
+megasas_set_pd_lba(struct MPI2_RAID_SCSI_IO_REQUEST *io_request, u8 cdb_len,
+                  struct IO_REQUEST_INFO *io_info, struct scsi_cmnd *scp,
+                  struct MR_FW_RAID_MAP_ALL *local_map_ptr, u32 ref_tag)
+{
+       struct MR_LD_RAID *raid;
+       u32 ld;
+       u64 start_blk = io_info->pdBlock;
+       u8 *cdb = io_request->CDB.CDB32;
+       u32 num_blocks = io_info->numBlocks;
+       u8 opcode, flagvals, groupnum, control;
+
+       /* Check if T10 PI (DIF) is enabled for this LD */
+       ld = MR_TargetIdToLdGet(io_info->ldTgtId, local_map_ptr);
+       raid = MR_LdRaidGet(ld, local_map_ptr);
+       if (raid->capability.ldPiMode == MR_PROT_INFO_TYPE_CONTROLLER) {
+               memset(cdb, 0, sizeof(io_request->CDB.CDB32));
+               cdb[0] =  MEGASAS_SCSI_VARIABLE_LENGTH_CMD;
+               cdb[7] =  MEGASAS_SCSI_ADDL_CDB_LEN;
+
+               if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
+                       cdb[9] = MEGASAS_SCSI_SERVICE_ACTION_READ32;
+               else
+                       cdb[9] = MEGASAS_SCSI_SERVICE_ACTION_WRITE32;
+               cdb[10] = MEGASAS_RD_WR_PROTECT_CHECK_ALL;
+
+               /* LBA */
+               cdb[12] = (u8)((start_blk >> 56) & 0xff);
+               cdb[13] = (u8)((start_blk >> 48) & 0xff);
+               cdb[14] = (u8)((start_blk >> 40) & 0xff);
+               cdb[15] = (u8)((start_blk >> 32) & 0xff);
+               cdb[16] = (u8)((start_blk >> 24) & 0xff);
+               cdb[17] = (u8)((start_blk >> 16) & 0xff);
+               cdb[18] = (u8)((start_blk >> 8) & 0xff);
+               cdb[19] = (u8)(start_blk & 0xff);
+
+               /* Logical block reference tag */
+               io_request->CDB.EEDP32.PrimaryReferenceTag =
+                       cpu_to_be32(ref_tag);
+               io_request->CDB.EEDP32.PrimaryApplicationTagMask = 0xffff;
+
+               io_request->DataLength = num_blocks * 512;
+               io_request->IoFlags = 32; /* Specify 32-byte cdb */
+
+               /* Transfer length */
+               cdb[28] = (u8)((num_blocks >> 24) & 0xff);
+               cdb[29] = (u8)((num_blocks >> 16) & 0xff);
+               cdb[30] = (u8)((num_blocks >> 8) & 0xff);
+               cdb[31] = (u8)(num_blocks & 0xff);
+
+               /* set SCSI IO EEDPFlags */
+               if (scp->sc_data_direction == PCI_DMA_FROMDEVICE) {
+                       io_request->EEDPFlags =
+                               MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG  |
+                               MPI2_SCSIIO_EEDPFLAGS_CHECK_REFTAG |
+                               MPI2_SCSIIO_EEDPFLAGS_CHECK_REMOVE_OP |
+                               MPI2_SCSIIO_EEDPFLAGS_CHECK_APPTAG |
+                               MPI2_SCSIIO_EEDPFLAGS_CHECK_GUARD;
+               } else {
+                       io_request->EEDPFlags =
+                               MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG |
+                               MPI2_SCSIIO_EEDPFLAGS_INSERT_OP;
+               }
+               io_request->Control |= (0x4 << 26);
+               io_request->EEDPBlockSize = MEGASAS_EEDPBLOCKSIZE;
+       } else {
+               /* Some drives don't support 16/12 byte CDB's, convert to 10 */
+               if (((cdb_len == 12) || (cdb_len == 16)) &&
+                   (start_blk <= 0xffffffff)) {
+                       if (cdb_len == 16) {
+                               opcode = cdb[0] == READ_16 ? READ_10 : WRITE_10;
+                               flagvals = cdb[1];
+                               groupnum = cdb[14];
+                               control = cdb[15];
+                       } else {
+                               opcode = cdb[0] == READ_12 ? READ_10 : WRITE_10;
+                               flagvals = cdb[1];
+                               groupnum = cdb[10];
+                               control = cdb[11];
+                       }
+
+                       memset(cdb, 0, sizeof(io_request->CDB.CDB32));
+
+                       cdb[0] = opcode;
+                       cdb[1] = flagvals;
+                       cdb[6] = groupnum;
+                       cdb[9] = control;
+
+                       /* Transfer length */
+                       cdb[8] = (u8)(num_blocks & 0xff);
+                       cdb[7] = (u8)((num_blocks >> 8) & 0xff);
+
+                       cdb_len = 10;
+               }
+
+               /* Normal case, just load LBA here */
+               switch (cdb_len) {
+               case 6:
+               {
+                       u8 val = cdb[1] & 0xE0;
+                       cdb[3] = (u8)(start_blk & 0xff);
+                       cdb[2] = (u8)((start_blk >> 8) & 0xff);
+                       cdb[1] = val | ((u8)(start_blk >> 16) & 0x1f);
+                       break;
+               }
+               case 10:
+                       cdb[5] = (u8)(start_blk & 0xff);
+                       cdb[4] = (u8)((start_blk >> 8) & 0xff);
+                       cdb[3] = (u8)((start_blk >> 16) & 0xff);
+                       cdb[2] = (u8)((start_blk >> 24) & 0xff);
+                       break;
+               case 12:
+                       cdb[5]    = (u8)(start_blk & 0xff);
+                       cdb[4]    = (u8)((start_blk >> 8) & 0xff);
+                       cdb[3]    = (u8)((start_blk >> 16) & 0xff);
+                       cdb[2]    = (u8)((start_blk >> 24) & 0xff);
+                       break;
+               case 16:
+                       cdb[9]    = (u8)(start_blk & 0xff);
+                       cdb[8]    = (u8)((start_blk >> 8) & 0xff);
+                       cdb[7]    = (u8)((start_blk >> 16) & 0xff);
+                       cdb[6]    = (u8)((start_blk >> 24) & 0xff);
+                       cdb[5]    = (u8)((start_blk >> 32) & 0xff);
+                       cdb[4]    = (u8)((start_blk >> 40) & 0xff);
+                       cdb[3]    = (u8)((start_blk >> 48) & 0xff);
+                       cdb[2]    = (u8)((start_blk >> 56) & 0xff);
+                       break;
+               }
+       }
+}
+
+/**
+ * megasas_build_ldio_fusion - Prepares IOs to devices
+ * @instance:          Adapter soft state
+ * @scp:               SCSI command
+ * @cmd:               Command to be prepared
+ *
+ * Prepares the io_request and chain elements (sg_frame) for IO
+ * The IO can be for PD (Fast Path) or LD
+ */
+void
+megasas_build_ldio_fusion(struct megasas_instance *instance,
+                         struct scsi_cmnd *scp,
+                         struct megasas_cmd_fusion *cmd)
+{
+       u8 fp_possible;
+       u32 start_lba_lo, start_lba_hi, device_id;
+       struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
+       union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
+       struct IO_REQUEST_INFO io_info;
+       struct fusion_context *fusion;
+       struct MR_FW_RAID_MAP_ALL *local_map_ptr;
+
+       device_id = MEGASAS_DEV_INDEX(instance, scp);
+
+       fusion = instance->ctrl_context;
+
+       io_request = cmd->io_request;
+       io_request->RaidContext.VirtualDiskTgtId = device_id;
+       io_request->RaidContext.status = 0;
+       io_request->RaidContext.exStatus = 0;
+
+       req_desc = (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)cmd->request_desc;
+
+       start_lba_lo = 0;
+       start_lba_hi = 0;
+       fp_possible = 0;
+
+       /*
+        * 6-byte READ(0x08) or WRITE(0x0A) cdb
+        */
+       if (scp->cmd_len == 6) {
+               io_request->DataLength = (u32) scp->cmnd[4];
+               start_lba_lo = ((u32) scp->cmnd[1] << 16) |
+                       ((u32) scp->cmnd[2] << 8) | (u32) scp->cmnd[3];
+
+               start_lba_lo &= 0x1FFFFF;
+       }
+
+       /*
+        * 10-byte READ(0x28) or WRITE(0x2A) cdb
+        */
+       else if (scp->cmd_len == 10) {
+               io_request->DataLength = (u32) scp->cmnd[8] |
+                       ((u32) scp->cmnd[7] << 8);
+               start_lba_lo = ((u32) scp->cmnd[2] << 24) |
+                       ((u32) scp->cmnd[3] << 16) |
+                       ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
+       }
+
+       /*
+        * 12-byte READ(0xA8) or WRITE(0xAA) cdb
+        */
+       else if (scp->cmd_len == 12) {
+               io_request->DataLength = ((u32) scp->cmnd[6] << 24) |
+                       ((u32) scp->cmnd[7] << 16) |
+                       ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
+               start_lba_lo = ((u32) scp->cmnd[2] << 24) |
+                       ((u32) scp->cmnd[3] << 16) |
+                       ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
+       }
+
+       /*
+        * 16-byte READ(0x88) or WRITE(0x8A) cdb
+        */
+       else if (scp->cmd_len == 16) {
+               io_request->DataLength = ((u32) scp->cmnd[10] << 24) |
+                       ((u32) scp->cmnd[11] << 16) |
+                       ((u32) scp->cmnd[12] << 8) | (u32) scp->cmnd[13];
+               start_lba_lo = ((u32) scp->cmnd[6] << 24) |
+                       ((u32) scp->cmnd[7] << 16) |
+                       ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
+
+               start_lba_hi = ((u32) scp->cmnd[2] << 24) |
+                       ((u32) scp->cmnd[3] << 16) |
+                       ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
+       }
+
+       memset(&io_info, 0, sizeof(struct IO_REQUEST_INFO));
+       io_info.ldStartBlock = ((u64)start_lba_hi << 32) | start_lba_lo;
+       io_info.numBlocks = io_request->DataLength;
+       io_info.ldTgtId = device_id;
+
+       if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
+               io_info.isRead = 1;
+
+       local_map_ptr = fusion->ld_map[(instance->map_id & 1)];
+
+       if ((MR_TargetIdToLdGet(device_id, local_map_ptr) >=
+            MAX_LOGICAL_DRIVES) || (!fusion->fast_path_io)) {
+               io_request->RaidContext.regLockFlags  = 0;
+               fp_possible = 0;
+       } else {
+               if (MR_BuildRaidContext(&io_info, &io_request->RaidContext,
+                                       local_map_ptr))
+                       fp_possible = io_info.fpOkForIo;
+       }
+
+       if (fp_possible) {
+               megasas_set_pd_lba(io_request, scp->cmd_len, &io_info, scp,
+                                  local_map_ptr, start_lba_lo);
+               io_request->DataLength = scsi_bufflen(scp);
+               io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
+               cmd->request_desc->SCSIIO.RequestFlags =
+                       (MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY
+                        << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
+               if ((fusion->load_balance_info[device_id].loadBalanceFlag) &&
+                   (io_info.isRead)) {
+                       io_info.devHandle =
+                               get_updated_dev_handle(
+                                       &fusion->load_balance_info[device_id],
+                                       &io_info);
+                       scp->SCp.Status |= MEGASAS_LOAD_BALANCE_FLAG;
+               } else
+                       scp->SCp.Status &= ~MEGASAS_LOAD_BALANCE_FLAG;
+               cmd->request_desc->SCSIIO.DevHandle = io_info.devHandle;
+               io_request->DevHandle = io_info.devHandle;
+       } else {
+               io_request->RaidContext.timeoutValue =
+                       local_map_ptr->raidMap.fpPdIoTimeoutSec;
+               io_request->Function = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
+               io_request->DevHandle = device_id;
+               cmd->request_desc->SCSIIO.RequestFlags =
+                       (MEGASAS_REQ_DESCRIPT_FLAGS_LD_IO
+                        << MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
+       } /* Not FP */
+}
+
+/**
+ * megasas_build_dcdb_fusion - Prepares IOs to devices
+ * @instance:          Adapter soft state
+ * @scp:               SCSI command
+ * @cmd:               Command to be prepared
+ *
+ * Prepares the io_request frame for non-io cmds
+ */
+static void
+megasas_build_dcdb_fusion(struct megasas_instance *instance,
+                         struct scsi_cmnd *scmd,
+                         struct megasas_cmd_fusion *cmd)
+{
+       u32 device_id;
+       struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
+       u16 pd_index = 0;
+       struct MR_FW_RAID_MAP_ALL *local_map_ptr;
+       struct fusion_context *fusion = instance->ctrl_context;
+
+       io_request = cmd->io_request;
+       device_id = MEGASAS_DEV_INDEX(instance, scmd);
+       pd_index = (scmd->device->channel * MEGASAS_MAX_DEV_PER_CHANNEL)
+               +scmd->device->id;
+       local_map_ptr = fusion->ld_map[(instance->map_id & 1)];
+
+       /* Check if this is a system PD I/O */
+       if ((instance->pd_list[pd_index].driveState == MR_PD_STATE_SYSTEM) &&
+           (instance->pd_list[pd_index].driveType == TYPE_DISK)) {
+               io_request->Function = 0;
+               io_request->DevHandle =
+                       local_map_ptr->raidMap.devHndlInfo[device_id].curDevHdl;
+               io_request->RaidContext.timeoutValue =
+                       local_map_ptr->raidMap.fpPdIoTimeoutSec;
+               io_request->RaidContext.regLockFlags = 0;
+               io_request->RaidContext.regLockRowLBA = 0;
+               io_request->RaidContext.regLockLength = 0;
+               io_request->RaidContext.RAIDFlags =
+                       MR_RAID_FLAGS_IO_SUB_TYPE_SYSTEM_PD <<
+                       MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT;
+               cmd->request_desc->SCSIIO.RequestFlags =
+                       (MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY <<
+                        MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
+       } else {
+               io_request->Function  = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
+               io_request->DevHandle = device_id;
+               cmd->request_desc->SCSIIO.RequestFlags =
+                       (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
+                        MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
+       }
+       io_request->RaidContext.VirtualDiskTgtId = device_id;
+       io_request->LUN[0] = scmd->device->lun;
+       io_request->DataLength = scsi_bufflen(scmd);
+}
+
+/**
+ * megasas_build_io_fusion -   Prepares IOs to devices
+ * @instance:          Adapter soft state
+ * @scp:               SCSI command
+ * @cmd:               Command to be prepared
+ *
+ * Invokes helper functions to prepare request frames
+ * and sets flags appropriate for IO/Non-IO cmd
+ */
+int
+megasas_build_io_fusion(struct megasas_instance *instance,
+                       struct scsi_cmnd *scp,
+                       struct megasas_cmd_fusion *cmd)
+{
+       u32 device_id, sge_count;
+       struct MPI2_RAID_SCSI_IO_REQUEST *io_request = cmd->io_request;
+
+       device_id = MEGASAS_DEV_INDEX(instance, scp);
+
+       /* Zero out some fields so they don't get reused */
+       io_request->LUN[0] = 0;
+       io_request->CDB.EEDP32.PrimaryReferenceTag = 0;
+       io_request->CDB.EEDP32.PrimaryApplicationTagMask = 0;
+       io_request->EEDPFlags = 0;
+       io_request->Control = 0;
+       io_request->EEDPBlockSize = 0;
+       io_request->IoFlags = 0;
+       io_request->RaidContext.RAIDFlags = 0;
+
+       memcpy(io_request->CDB.CDB32, scp->cmnd, scp->cmd_len);
+       /*
+        * Just the CDB length,rest of the Flags are zero
+        * This will be modified for FP in build_ldio_fusion
+        */
+       io_request->IoFlags = scp->cmd_len;
+
+       if (megasas_is_ldio(scp))
+               megasas_build_ldio_fusion(instance, scp, cmd);
+       else
+               megasas_build_dcdb_fusion(instance, scp, cmd);
+
+       /*
+        * Construct SGL
+        */
+
+       sge_count =
+               megasas_make_sgl_fusion(instance, scp,
+                                       (struct MPI25_IEEE_SGE_CHAIN64 *)
+                                       &io_request->SGL, cmd);
+
+       if (sge_count > instance->max_num_sge) {
+               printk(KERN_ERR "megasas: Error. sge_count (0x%x) exceeds "
+                      "max (0x%x) allowed\n", sge_count,
+                      instance->max_num_sge);
+               return 1;
+       }
+
+       io_request->RaidContext.numSGE = sge_count;
+
+       io_request->SGLFlags = MPI2_SGE_FLAGS_64_BIT_ADDRESSING;
+
+       if (scp->sc_data_direction == PCI_DMA_TODEVICE)
+               io_request->Control |= MPI2_SCSIIO_CONTROL_WRITE;
+       else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
+               io_request->Control |= MPI2_SCSIIO_CONTROL_READ;
+
+       io_request->SGLOffset0 =
+               offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL) / 4;
+
+       io_request->SenseBufferLowAddress = cmd->sense_phys_addr;
+       io_request->SenseBufferLength = SCSI_SENSE_BUFFERSIZE;
+
+       cmd->scmd = scp;
+       scp->SCp.ptr = (char *)cmd;
+
+       return 0;
+}
+
+union MEGASAS_REQUEST_DESCRIPTOR_UNION *
+megasas_get_request_descriptor(struct megasas_instance *instance, u16 index)
+{
+       u8 *p;
+       struct fusion_context *fusion;
+
+       if (index >= instance->max_fw_cmds) {
+               printk(KERN_ERR "megasas: Invalid SMID (0x%x)request for "
+                      "descriptor\n", index);
+               return NULL;
+       }
+       fusion = instance->ctrl_context;
+       p = fusion->req_frames_desc
+               +sizeof(union MEGASAS_REQUEST_DESCRIPTOR_UNION) *index;
+
+       return (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)p;
+}
+
+/**
+ * megasas_build_and_issue_cmd_fusion -Main routine for building and
+ *                                     issuing non IOCTL cmd
+ * @instance:                  Adapter soft state
+ * @scmd:                      pointer to scsi cmd from OS
+ */
+static u32
+megasas_build_and_issue_cmd_fusion(struct megasas_instance *instance,
+                                  struct scsi_cmnd *scmd)
+{
+       struct megasas_cmd_fusion *cmd;
+       union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
+       u32 index;
+       struct fusion_context *fusion;
+
+       fusion = instance->ctrl_context;
+
+       cmd = megasas_get_cmd_fusion(instance);
+       if (!cmd)
+               return SCSI_MLQUEUE_HOST_BUSY;
+
+       index = cmd->index;
+
+       req_desc = megasas_get_request_descriptor(instance, index-1);
+       if (!req_desc)
+               return 1;
+
+       req_desc->Words = 0;
+       cmd->request_desc = req_desc;
+       cmd->request_desc->Words = 0;
+
+       if (megasas_build_io_fusion(instance, scmd, cmd)) {
+               megasas_return_cmd_fusion(instance, cmd);
+               printk(KERN_ERR "megasas: Error building command.\n");
+               cmd->request_desc = NULL;
+               return 1;
+       }
+
+       req_desc = cmd->request_desc;
+       req_desc->SCSIIO.SMID = index;
+
+       if (cmd->io_request->ChainOffset != 0 &&
+           cmd->io_request->ChainOffset != 0xF)
+               printk(KERN_ERR "megasas: The chain offset value is not "
+                      "correct : %x\n", cmd->io_request->ChainOffset);
+
+       /*
+        * Issue the command to the FW
+        */
+       atomic_inc(&instance->fw_outstanding);
+
+       instance->instancet->fire_cmd(instance,
+                                     req_desc->u.low, req_desc->u.high,
+                                     instance->reg_set);
+
+       return 0;
+}
+
+/**
+ * complete_cmd_fusion -       Completes command
+ * @instance:                  Adapter soft state
+ * Completes all commands that is in reply descriptor queue
+ */
+int
+complete_cmd_fusion(struct megasas_instance *instance)
+{
+       union MPI2_REPLY_DESCRIPTORS_UNION *desc;
+       struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *reply_desc;
+       struct MPI2_RAID_SCSI_IO_REQUEST *scsi_io_req;
+       struct fusion_context *fusion;
+       struct megasas_cmd *cmd_mfi;
+       struct megasas_cmd_fusion *cmd_fusion;
+       u16 smid, num_completed;
+       u8 reply_descript_type, arm;
+       u32 status, extStatus, device_id;
+       union desc_value d_val;
+       struct LD_LOAD_BALANCE_INFO *lbinfo;
+
+       fusion = instance->ctrl_context;
+
+       if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR)
+               return IRQ_HANDLED;
+
+       desc = fusion->reply_frames_desc;
+       desc += fusion->last_reply_idx;
+
+       reply_desc = (struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *)desc;
+
+       d_val.word = desc->Words;
+
+       reply_descript_type = reply_desc->ReplyFlags &
+               MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
+
+       if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED)
+               return IRQ_NONE;
+
+       d_val.word = desc->Words;
+
+       num_completed = 0;
+
+       while ((d_val.u.low != UINT_MAX) && (d_val.u.high != UINT_MAX)) {
+               smid = reply_desc->SMID;
+
+               cmd_fusion = fusion->cmd_list[smid - 1];
+
+               scsi_io_req =
+                       (struct MPI2_RAID_SCSI_IO_REQUEST *)
+                 cmd_fusion->io_request;
+
+               if (cmd_fusion->scmd)
+                       cmd_fusion->scmd->SCp.ptr = NULL;
+
+               status = scsi_io_req->RaidContext.status;
+               extStatus = scsi_io_req->RaidContext.exStatus;
+
+               switch (scsi_io_req->Function) {
+               case MPI2_FUNCTION_SCSI_IO_REQUEST:  /*Fast Path IO.*/
+                       /* Update load balancing info */
+                       device_id = MEGASAS_DEV_INDEX(instance,
+                                                     cmd_fusion->scmd);
+                       lbinfo = &fusion->load_balance_info[device_id];
+                       if (cmd_fusion->scmd->SCp.Status &
+                           MEGASAS_LOAD_BALANCE_FLAG) {
+                               arm = lbinfo->raid1DevHandle[0] ==
+                                       cmd_fusion->io_request->DevHandle ? 0 :
+                                       1;
+                               atomic_dec(&lbinfo->scsi_pending_cmds[arm]);
+                               cmd_fusion->scmd->SCp.Status &=
+                                       ~MEGASAS_LOAD_BALANCE_FLAG;
+                       }
+                       if (reply_descript_type ==
+                           MPI2_RPY_DESCRIPT_FLAGS_SCSI_IO_SUCCESS) {
+                               if (megasas_dbg_lvl == 5)
+                                       printk(KERN_ERR "\nmegasas: FAST Path "
+                                              "IO Success\n");
+                       }
+                       /* Fall thru and complete IO */
+               case MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST: /* LD-IO Path */
+                       /* Map the FW Cmd Status */
+                       map_cmd_status(cmd_fusion, status, extStatus);
+                       scsi_dma_unmap(cmd_fusion->scmd);
+                       cmd_fusion->scmd->scsi_done(cmd_fusion->scmd);
+                       scsi_io_req->RaidContext.status = 0;
+                       scsi_io_req->RaidContext.exStatus = 0;
+                       megasas_return_cmd_fusion(instance, cmd_fusion);
+                       atomic_dec(&instance->fw_outstanding);
+
+                       break;
+               case MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST: /*MFI command */
+                       cmd_mfi = instance->cmd_list[cmd_fusion->sync_cmd_idx];
+                       megasas_complete_cmd(instance, cmd_mfi, DID_OK);
+                       cmd_fusion->flags = 0;
+                       megasas_return_cmd_fusion(instance, cmd_fusion);
+
+                       break;
+               }
+
+               fusion->last_reply_idx++;
+               if (fusion->last_reply_idx >= fusion->reply_q_depth)
+                       fusion->last_reply_idx = 0;
+
+               desc->Words = ULLONG_MAX;
+               num_completed++;
+
+               /* Get the next reply descriptor */
+               if (!fusion->last_reply_idx)
+                       desc = fusion->reply_frames_desc;
+               else
+                       desc++;
+
+               reply_desc =
+                 (struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *)desc;
+
+               d_val.word = desc->Words;
+
+               reply_descript_type = reply_desc->ReplyFlags &
+                       MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
+
+               if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED)
+                       break;
+       }
+
+       if (!num_completed)
+               return IRQ_NONE;
+
+       wmb();
+       writel(fusion->last_reply_idx,
+              &instance->reg_set->reply_post_host_index);
+
+       return IRQ_HANDLED;
+}
+
+/**
+ * megasas_complete_cmd_dpc_fusion -   Completes command
+ * @instance:                  Adapter soft state
+ *
+ * Tasklet to complete cmds
+ */
+void
+megasas_complete_cmd_dpc_fusion(unsigned long instance_addr)
+{
+       struct megasas_instance *instance =
+               (struct megasas_instance *)instance_addr;
+       unsigned long flags;
+
+       /* If we have already declared adapter dead, donot complete cmds */
+       spin_lock_irqsave(&instance->hba_lock, flags);
+       if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
+               spin_unlock_irqrestore(&instance->hba_lock, flags);
+               return;
+       }
+       spin_unlock_irqrestore(&instance->hba_lock, flags);
+
+       spin_lock_irqsave(&instance->completion_lock, flags);
+       complete_cmd_fusion(instance);
+       spin_unlock_irqrestore(&instance->completion_lock, flags);
+}
+
+/**
+ * megasas_isr_fusion - isr entry point
+ */
+irqreturn_t megasas_isr_fusion(int irq, void *devp)
+{
+       struct megasas_instance *instance = (struct megasas_instance *)devp;
+       u32 mfiStatus, fw_state;
+
+       if (!instance->msi_flag) {
+               mfiStatus = instance->instancet->clear_intr(instance->reg_set);
+               if (!mfiStatus)
+                       return IRQ_NONE;
+       }
+
+       /* If we are resetting, bail */
+       if (test_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags))
+               return IRQ_HANDLED;
+
+       if (!complete_cmd_fusion(instance)) {
+               /* If we didn't complete any commands, check for FW fault */
+               fw_state = instance->instancet->read_fw_status_reg(
+                       instance->reg_set) & MFI_STATE_MASK;
+               if (fw_state == MFI_STATE_FAULT)
+                       schedule_work(&instance->work_init);
+       }
+
+       return IRQ_HANDLED;
+}
+
+/**
+ * build_mpt_mfi_pass_thru - builds a cmd fo MFI Pass thru
+ * @instance:                  Adapter soft state
+ * mfi_cmd:                    megasas_cmd pointer
+ *
+ */
+u8
+build_mpt_mfi_pass_thru(struct megasas_instance *instance,
+                       struct megasas_cmd *mfi_cmd)
+{
+       struct MPI25_IEEE_SGE_CHAIN64 *mpi25_ieee_chain;
+       struct MPI2_RAID_SCSI_IO_REQUEST *io_req;
+       struct megasas_cmd_fusion *cmd;
+       struct fusion_context *fusion;
+       struct megasas_header *frame_hdr = &mfi_cmd->frame->hdr;
+
+       cmd = megasas_get_cmd_fusion(instance);
+       if (!cmd)
+               return 1;
+
+       /*  Save the smid. To be used for returning the cmd */
+       mfi_cmd->context.smid = cmd->index;
+
+       cmd->sync_cmd_idx = mfi_cmd->index;
+
+       /*
+        * For cmds where the flag is set, store the flag and check
+        * on completion. For cmds with this flag, don't call
+        * megasas_complete_cmd
+        */
+
+       if (frame_hdr->flags & MFI_FRAME_DONT_POST_IN_REPLY_QUEUE)
+               cmd->flags = MFI_FRAME_DONT_POST_IN_REPLY_QUEUE;
+
+       fusion = instance->ctrl_context;
+       io_req = cmd->io_request;
+       mpi25_ieee_chain =
+         (struct MPI25_IEEE_SGE_CHAIN64 *)&io_req->SGL.IeeeChain;
+
+       io_req->Function    = MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST;
+       io_req->SGLOffset0  = offsetof(struct MPI2_RAID_SCSI_IO_REQUEST,
+                                      SGL) / 4;
+       io_req->ChainOffset = fusion->chain_offset_mfi_pthru;
+
+       mpi25_ieee_chain->Address = mfi_cmd->frame_phys_addr;
+
+       mpi25_ieee_chain->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT |
+               MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR;
+
+       mpi25_ieee_chain->Length = MEGASAS_MAX_SZ_CHAIN_FRAME;
+
+       return 0;
+}
+
+/**
+ * build_mpt_cmd - Calls helper function to build a cmd MFI Pass thru cmd
+ * @instance:                  Adapter soft state
+ * @cmd:                       mfi cmd to build
+ *
+ */
+union MEGASAS_REQUEST_DESCRIPTOR_UNION *
+build_mpt_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
+{
+       union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
+       u16 index;
+
+       if (build_mpt_mfi_pass_thru(instance, cmd)) {
+               printk(KERN_ERR "Couldn't build MFI pass thru cmd\n");
+               return NULL;
+       }
+
+       index = cmd->context.smid;
+
+       req_desc = megasas_get_request_descriptor(instance, index - 1);
+
+       if (!req_desc)
+               return NULL;
+
+       req_desc->Words = 0;
+       req_desc->SCSIIO.RequestFlags = (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
+                                        MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
+
+       req_desc->SCSIIO.SMID = index;
+
+       return req_desc;
+}
+
+/**
+ * megasas_issue_dcmd_fusion - Issues a MFI Pass thru cmd
+ * @instance:                  Adapter soft state
+ * @cmd:                       mfi cmd pointer
+ *
+ */
+void
+megasas_issue_dcmd_fusion(struct megasas_instance *instance,
+                         struct megasas_cmd *cmd)
+{
+       union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
+       union desc_value d_val;
+
+       req_desc = build_mpt_cmd(instance, cmd);
+       if (!req_desc) {
+               printk(KERN_ERR "Couldn't issue MFI pass thru cmd\n");
+               return;
+       }
+       d_val.word = req_desc->Words;
+
+       instance->instancet->fire_cmd(instance, req_desc->u.low,
+                                     req_desc->u.high, instance->reg_set);
+}
+
+/**
+ * megasas_release_fusion -    Reverses the FW initialization
+ * @intance:                   Adapter soft state
+ */
+void
+megasas_release_fusion(struct megasas_instance *instance)
+{
+       megasas_free_cmds(instance);
+       megasas_free_cmds_fusion(instance);
+
+       iounmap(instance->reg_set);
+
+       pci_release_selected_regions(instance->pdev, instance->bar);
+}
+
+/**
+ * megasas_read_fw_status_reg_fusion - returns the current FW status value
+ * @regs:                      MFI register set
+ */
+static u32
+megasas_read_fw_status_reg_fusion(struct megasas_register_set __iomem *regs)
+{
+       return readl(&(regs)->outbound_scratch_pad);
+}
+
+/**
+ * megasas_adp_reset_fusion -  For controller reset
+ * @regs:                              MFI register set
+ */
+static int
+megasas_adp_reset_fusion(struct megasas_instance *instance,
+                        struct megasas_register_set __iomem *regs)
+{
+       return 0;
+}
+
+/**
+ * megasas_check_reset_fusion -        For controller reset check
+ * @regs:                              MFI register set
+ */
+static int
+megasas_check_reset_fusion(struct megasas_instance *instance,
+                          struct megasas_register_set __iomem *regs)
+{
+       return 0;
+}
+
+/* This function waits for outstanding commands on fusion to complete */
+int megasas_wait_for_outstanding_fusion(struct megasas_instance *instance)
+{
+       int i, outstanding, retval = 0;
+       u32 fw_state, wait_time = MEGASAS_RESET_WAIT_TIME;
+
+       for (i = 0; i < wait_time; i++) {
+               /* Check if firmware is in fault state */
+               fw_state = instance->instancet->read_fw_status_reg(
+                       instance->reg_set) & MFI_STATE_MASK;
+               if (fw_state == MFI_STATE_FAULT) {
+                       printk(KERN_WARNING "megasas: Found FW in FAULT state,"
+                              " will reset adapter.\n");
+                       retval = 1;
+                       goto out;
+               }
+
+               outstanding = atomic_read(&instance->fw_outstanding);
+               if (!outstanding)
+                       goto out;
+
+               if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
+                       printk(KERN_NOTICE "megasas: [%2d]waiting for %d "
+                              "commands to complete\n", i, outstanding);
+                       megasas_complete_cmd_dpc_fusion(
+                               (unsigned long)instance);
+               }
+               msleep(1000);
+       }
+
+       if (atomic_read(&instance->fw_outstanding)) {
+               printk("megaraid_sas: pending commands remain after waiting, "
+                      "will reset adapter.\n");
+               retval = 1;
+       }
+out:
+       return retval;
+}
+
+void  megasas_reset_reply_desc(struct megasas_instance *instance)
+{
+       int i;
+       struct fusion_context *fusion;
+       union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc;
+
+       fusion = instance->ctrl_context;
+       fusion->last_reply_idx = 0;
+       reply_desc = fusion->reply_frames_desc;
+       for (i = 0 ; i < fusion->reply_q_depth; i++, reply_desc++)
+               reply_desc->Words = ULLONG_MAX;
+}
+
+/* Core fusion reset function */
+int megasas_reset_fusion(struct Scsi_Host *shost)
+{
+       int retval = SUCCESS, i, j, retry = 0;
+       struct megasas_instance *instance;
+       struct megasas_cmd_fusion *cmd_fusion;
+       struct fusion_context *fusion;
+       struct megasas_cmd *cmd_mfi;
+       union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
+       u32 host_diag, abs_state;
+
+       instance = (struct megasas_instance *)shost->hostdata;
+       fusion = instance->ctrl_context;
+
+       mutex_lock(&instance->reset_mutex);
+       set_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
+       instance->adprecovery = MEGASAS_ADPRESET_SM_INFAULT;
+       instance->instancet->disable_intr(instance->reg_set);
+       msleep(1000);
+
+       if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
+               printk(KERN_WARNING "megaraid_sas: Hardware critical error, "
+                      "returning FAILED.\n");
+               retval = FAILED;
+               goto out;
+       }
+
+       /* First try waiting for commands to complete */
+       if (megasas_wait_for_outstanding_fusion(instance)) {
+               printk(KERN_WARNING "megaraid_sas: resetting fusion "
+                      "adapter.\n");
+               /* Now return commands back to the OS */
+               for (i = 0 ; i < instance->max_fw_cmds; i++) {
+                       cmd_fusion = fusion->cmd_list[i];
+                       if (cmd_fusion->scmd) {
+                               scsi_dma_unmap(cmd_fusion->scmd);
+                               cmd_fusion->scmd->result = (DID_RESET << 16);
+                               cmd_fusion->scmd->scsi_done(cmd_fusion->scmd);
+                               megasas_return_cmd_fusion(instance, cmd_fusion);
+                               atomic_dec(&instance->fw_outstanding);
+                       }
+               }
+
+               if (instance->disableOnlineCtrlReset == 1) {
+                       /* Reset not supported, kill adapter */
+                       printk(KERN_WARNING "megaraid_sas: Reset not supported"
+                              ", killing adapter.\n");
+                       megaraid_sas_kill_hba(instance);
+                       instance->adprecovery = MEGASAS_HW_CRITICAL_ERROR;
+                       retval = FAILED;
+                       goto out;
+               }
+
+               /* Now try to reset the chip */
+               for (i = 0; i < MEGASAS_FUSION_MAX_RESET_TRIES; i++) {
+                       writel(MPI2_WRSEQ_FLUSH_KEY_VALUE,
+                              &instance->reg_set->fusion_seq_offset);
+                       writel(MPI2_WRSEQ_1ST_KEY_VALUE,
+                              &instance->reg_set->fusion_seq_offset);
+                       writel(MPI2_WRSEQ_2ND_KEY_VALUE,
+                              &instance->reg_set->fusion_seq_offset);
+                       writel(MPI2_WRSEQ_3RD_KEY_VALUE,
+                              &instance->reg_set->fusion_seq_offset);
+                       writel(MPI2_WRSEQ_4TH_KEY_VALUE,
+                              &instance->reg_set->fusion_seq_offset);
+                       writel(MPI2_WRSEQ_5TH_KEY_VALUE,
+                              &instance->reg_set->fusion_seq_offset);
+                       writel(MPI2_WRSEQ_6TH_KEY_VALUE,
+                              &instance->reg_set->fusion_seq_offset);
+
+                       /* Check that the diag write enable (DRWE) bit is on */
+                       host_diag = readl(&instance->reg_set->fusion_host_diag);
+                       while (!(host_diag & HOST_DIAG_WRITE_ENABLE)) {
+                               msleep(100);
+                               host_diag =
+                               readl(&instance->reg_set->fusion_host_diag);
+                               if (retry++ == 100) {
+                                       printk(KERN_WARNING "megaraid_sas: "
+                                              "Host diag unlock failed!\n");
+                                       break;
+                               }
+                       }
+                       if (!(host_diag & HOST_DIAG_WRITE_ENABLE))
+                               continue;
+
+                       /* Send chip reset command */
+                       writel(host_diag | HOST_DIAG_RESET_ADAPTER,
+                              &instance->reg_set->fusion_host_diag);
+                       msleep(3000);
+
+                       /* Make sure reset adapter bit is cleared */
+                       host_diag = readl(&instance->reg_set->fusion_host_diag);
+                       retry = 0;
+                       while (host_diag & HOST_DIAG_RESET_ADAPTER) {
+                               msleep(100);
+                               host_diag =
+                               readl(&instance->reg_set->fusion_host_diag);
+                               if (retry++ == 1000) {
+                                       printk(KERN_WARNING "megaraid_sas: "
+                                              "Diag reset adapter never "
+                                              "cleared!\n");
+                                       break;
+                               }
+                       }
+                       if (host_diag & HOST_DIAG_RESET_ADAPTER)
+                               continue;
+
+                       abs_state =
+                               instance->instancet->read_fw_status_reg(
+                                       instance->reg_set);
+                       retry = 0;
+
+                       while ((abs_state <= MFI_STATE_FW_INIT) &&
+                              (retry++ < 1000)) {
+                               msleep(100);
+                               abs_state =
+                               instance->instancet->read_fw_status_reg(
+                                       instance->reg_set);
+                       }
+                       if (abs_state <= MFI_STATE_FW_INIT) {
+                               printk(KERN_WARNING "megaraid_sas: firmware "
+                                      "state < MFI_STATE_FW_INIT, state = "
+                                      "0x%x\n", abs_state);
+                               continue;
+                       }
+
+                       /* Wait for FW to become ready */
+                       if (megasas_transition_to_ready(instance)) {
+                               printk(KERN_WARNING "megaraid_sas: Failed to "
+                                      "transition controller to ready.\n");
+                               continue;
+                       }
+
+                       megasas_reset_reply_desc(instance);
+                       if (megasas_ioc_init_fusion(instance)) {
+                               printk(KERN_WARNING "megaraid_sas: "
+                                      "megasas_ioc_init_fusion() failed!\n");
+                               continue;
+                       }
+
+                       instance->instancet->enable_intr(instance->reg_set);
+                       instance->adprecovery = MEGASAS_HBA_OPERATIONAL;
+
+                       /* Re-fire management commands */
+                       for (j = 0 ; j < instance->max_fw_cmds; j++) {
+                               cmd_fusion = fusion->cmd_list[j];
+                               if (cmd_fusion->sync_cmd_idx !=
+                                   (u32)ULONG_MAX) {
+                                       cmd_mfi =
+                                       instance->
+                                       cmd_list[cmd_fusion->sync_cmd_idx];
+                                       if (cmd_mfi->frame->dcmd.opcode ==
+                                           MR_DCMD_LD_MAP_GET_INFO) {
+                                               megasas_return_cmd(instance,
+                                                                  cmd_mfi);
+                                               megasas_return_cmd_fusion(
+                                                       instance, cmd_fusion);
+                                       } else  {
+                                               req_desc =
+                                               megasas_get_request_descriptor(
+                                                       instance,
+                                                       cmd_mfi->context.smid
+                                                       -1);
+                                               if (!req_desc)
+                                                       printk(KERN_WARNING
+                                                              "req_desc NULL"
+                                                              "\n");
+                                               else {
+                                                       instance->instancet->
+                                                       fire_cmd(instance,
+                                                                req_desc->
+                                                                u.low,
+                                                                req_desc->
+                                                                u.high,
+                                                                instance->
+                                                                reg_set);
+                                               }
+                                       }
+                               }
+                       }
+
+                       /* Reset load balance info */
+                       memset(fusion->load_balance_info, 0,
+                              sizeof(struct LD_LOAD_BALANCE_INFO)
+                              *MAX_LOGICAL_DRIVES);
+
+                       if (!megasas_get_map_info(instance))
+                               megasas_sync_map_info(instance);
+
+                       /* Adapter reset completed successfully */
+                       printk(KERN_WARNING "megaraid_sas: Reset "
+                              "successful.\n");
+                       retval = SUCCESS;
+                       goto out;
+               }
+               /* Reset failed, kill the adapter */
+               printk(KERN_WARNING "megaraid_sas: Reset failed, killing "
+                      "adapter.\n");
+               megaraid_sas_kill_hba(instance);
+               retval = FAILED;
+       } else {
+               instance->instancet->enable_intr(instance->reg_set);
+               instance->adprecovery = MEGASAS_HBA_OPERATIONAL;
+       }
+out:
+       clear_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
+       mutex_unlock(&instance->reset_mutex);
+       return retval;
+}
+
+/* Fusion OCR work queue */
+void megasas_fusion_ocr_wq(struct work_struct *work)
+{
+       struct megasas_instance *instance =
+               container_of(work, struct megasas_instance, work_init);
+
+       megasas_reset_fusion(instance->host);
+}
+
+struct megasas_instance_template megasas_instance_template_fusion = {
+       .fire_cmd = megasas_fire_cmd_fusion,
+       .enable_intr = megasas_enable_intr_fusion,
+       .disable_intr = megasas_disable_intr_fusion,
+       .clear_intr = megasas_clear_intr_fusion,
+       .read_fw_status_reg = megasas_read_fw_status_reg_fusion,
+       .adp_reset = megasas_adp_reset_fusion,
+       .check_reset = megasas_check_reset_fusion,
+       .service_isr = megasas_isr_fusion,
+       .tasklet = megasas_complete_cmd_dpc_fusion,
+       .init_adapter = megasas_init_adapter_fusion,
+       .build_and_issue_cmd = megasas_build_and_issue_cmd_fusion,
+       .issue_dcmd = megasas_issue_dcmd_fusion,
+};
diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.h b/drivers/scsi/megaraid/megaraid_sas_fusion.h
new file mode 100644 (file)
index 0000000..82b577a
--- /dev/null
@@ -0,0 +1,695 @@
+/*
+ *  Linux MegaRAID driver for SAS based RAID controllers
+ *
+ *  Copyright (c) 2009-2011  LSI Corporation.
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version 2
+ *  of the License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ *  FILE: megaraid_sas_fusion.h
+ *
+ *  Authors: LSI Corporation
+ *           Manoj Jose
+ *           Sumant Patro
+ *
+ *  Send feedback to: <megaraidlinux@lsi.com>
+ *
+ *  Mail to: LSI Corporation, 1621 Barber Lane, Milpitas, CA 95035
+ *     ATTN: Linuxraid
+ */
+
+#ifndef _MEGARAID_SAS_FUSION_H_
+#define _MEGARAID_SAS_FUSION_H_
+
+/* Fusion defines */
+#define MEGASAS_MAX_SZ_CHAIN_FRAME 1024
+#define MFI_FUSION_ENABLE_INTERRUPT_MASK (0x00000009)
+#define MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE 256
+#define MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST   0xF0
+#define MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST         0xF1
+#define MEGASAS_LOAD_BALANCE_FLAG                  0x1
+#define MEGASAS_DCMD_MBOX_PEND_FLAG                0x1
+#define HOST_DIAG_WRITE_ENABLE                     0x80
+#define HOST_DIAG_RESET_ADAPTER                            0x4
+#define MEGASAS_FUSION_MAX_RESET_TRIES             3
+
+/* T10 PI defines */
+#define MR_PROT_INFO_TYPE_CONTROLLER                0x8
+#define MEGASAS_SCSI_VARIABLE_LENGTH_CMD            0x7f
+#define MEGASAS_SCSI_SERVICE_ACTION_READ32          0x9
+#define MEGASAS_SCSI_SERVICE_ACTION_WRITE32         0xB
+#define MEGASAS_SCSI_ADDL_CDB_LEN                   0x18
+#define MEGASAS_RD_WR_PROTECT_CHECK_ALL                    0x20
+#define MEGASAS_RD_WR_PROTECT_CHECK_NONE           0x60
+#define MEGASAS_EEDPBLOCKSIZE                      512
+
+/*
+ * Raid context flags
+ */
+
+#define MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT   0x4
+#define MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_MASK    0x30
+enum MR_RAID_FLAGS_IO_SUB_TYPE {
+       MR_RAID_FLAGS_IO_SUB_TYPE_NONE = 0,
+       MR_RAID_FLAGS_IO_SUB_TYPE_SYSTEM_PD = 1,
+};
+
+/*
+ * Request descriptor types
+ */
+#define MEGASAS_REQ_DESCRIPT_FLAGS_LD_IO           0x7
+#define MEGASAS_REQ_DESCRIPT_FLAGS_MFA             0x1
+
+#define MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT      1
+
+#define MEGASAS_FP_CMD_LEN     16
+#define MEGASAS_FUSION_IN_RESET 0
+
+/*
+ * Raid Context structure which describes MegaRAID specific IO Paramenters
+ * This resides at offset 0x60 where the SGL normally starts in MPT IO Frames
+ */
+
+struct RAID_CONTEXT {
+       u16     resvd0;
+       u16     timeoutValue;
+       u8      regLockFlags;
+       u8      resvd1;
+       u16     VirtualDiskTgtId;
+       u64     regLockRowLBA;
+       u32     regLockLength;
+       u16     nextLMId;
+       u8      exStatus;
+       u8      status;
+       u8      RAIDFlags;
+       u8      numSGE;
+       u16     configSeqNum;
+       u8      spanArm;
+       u8      resvd2[3];
+};
+
+#define RAID_CTX_SPANARM_ARM_SHIFT     (0)
+#define RAID_CTX_SPANARM_ARM_MASK      (0x1f)
+
+#define RAID_CTX_SPANARM_SPAN_SHIFT    (5)
+#define RAID_CTX_SPANARM_SPAN_MASK     (0xE0)
+
+/*
+ * define region lock types
+ */
+enum REGION_TYPE {
+       REGION_TYPE_UNUSED       = 0,
+       REGION_TYPE_SHARED_READ  = 1,
+       REGION_TYPE_SHARED_WRITE = 2,
+       REGION_TYPE_EXCLUSIVE    = 3,
+};
+
+/* MPI2 defines */
+#define MPI2_FUNCTION_IOC_INIT              (0x02) /* IOC Init */
+#define MPI2_WHOINIT_HOST_DRIVER            (0x04)
+#define MPI2_VERSION_MAJOR                  (0x02)
+#define MPI2_VERSION_MINOR                  (0x00)
+#define MPI2_VERSION_MAJOR_MASK             (0xFF00)
+#define MPI2_VERSION_MAJOR_SHIFT            (8)
+#define MPI2_VERSION_MINOR_MASK             (0x00FF)
+#define MPI2_VERSION_MINOR_SHIFT            (0)
+#define MPI2_VERSION ((MPI2_VERSION_MAJOR << MPI2_VERSION_MAJOR_SHIFT) | \
+                     MPI2_VERSION_MINOR)
+#define MPI2_HEADER_VERSION_UNIT            (0x10)
+#define MPI2_HEADER_VERSION_DEV             (0x00)
+#define MPI2_HEADER_VERSION_UNIT_MASK       (0xFF00)
+#define MPI2_HEADER_VERSION_UNIT_SHIFT      (8)
+#define MPI2_HEADER_VERSION_DEV_MASK        (0x00FF)
+#define MPI2_HEADER_VERSION_DEV_SHIFT       (0)
+#define MPI2_HEADER_VERSION ((MPI2_HEADER_VERSION_UNIT << 8) | \
+                            MPI2_HEADER_VERSION_DEV)
+#define MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR      (0x03)
+#define MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG        (0x8000)
+#define MPI2_SCSIIO_EEDPFLAGS_CHECK_REFTAG          (0x0400)
+#define MPI2_SCSIIO_EEDPFLAGS_CHECK_REMOVE_OP       (0x0003)
+#define MPI2_SCSIIO_EEDPFLAGS_CHECK_APPTAG          (0x0200)
+#define MPI2_SCSIIO_EEDPFLAGS_CHECK_GUARD           (0x0100)
+#define MPI2_SCSIIO_EEDPFLAGS_INSERT_OP             (0x0004)
+#define MPI2_FUNCTION_SCSI_IO_REQUEST               (0x00) /* SCSI IO */
+#define MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY           (0x06)
+#define MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO                 (0x00)
+#define MPI2_SGE_FLAGS_64_BIT_ADDRESSING        (0x02)
+#define MPI2_SCSIIO_CONTROL_WRITE               (0x01000000)
+#define MPI2_SCSIIO_CONTROL_READ                (0x02000000)
+#define MPI2_REQ_DESCRIPT_FLAGS_TYPE_MASK       (0x0E)
+#define MPI2_RPY_DESCRIPT_FLAGS_UNUSED          (0x0F)
+#define MPI2_RPY_DESCRIPT_FLAGS_SCSI_IO_SUCCESS (0x00)
+#define MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK       (0x0F)
+#define MPI2_WRSEQ_FLUSH_KEY_VALUE              (0x0)
+#define MPI2_WRITE_SEQUENCE_OFFSET              (0x00000004)
+#define MPI2_WRSEQ_1ST_KEY_VALUE                (0xF)
+#define MPI2_WRSEQ_2ND_KEY_VALUE                (0x4)
+#define MPI2_WRSEQ_3RD_KEY_VALUE                (0xB)
+#define MPI2_WRSEQ_4TH_KEY_VALUE                (0x2)
+#define MPI2_WRSEQ_5TH_KEY_VALUE                (0x7)
+#define MPI2_WRSEQ_6TH_KEY_VALUE                (0xD)
+
+struct MPI25_IEEE_SGE_CHAIN64 {
+       u64                     Address;
+       u32                     Length;
+       u16                     Reserved1;
+       u8                      NextChainOffset;
+       u8                      Flags;
+};
+
+struct MPI2_SGE_SIMPLE_UNION {
+       u32                     FlagsLength;
+       union {
+               u32                 Address32;
+               u64                 Address64;
+       } u;
+};
+
+struct MPI2_SCSI_IO_CDB_EEDP32 {
+       u8                      CDB[20];                    /* 0x00 */
+       u32                     PrimaryReferenceTag;        /* 0x14 */
+       u16                     PrimaryApplicationTag;      /* 0x18 */
+       u16                     PrimaryApplicationTagMask;  /* 0x1A */
+       u32                     TransferLength;             /* 0x1C */
+};
+
+struct MPI2_SGE_CHAIN_UNION {
+       u16                     Length;
+       u8                      NextChainOffset;
+       u8                      Flags;
+       union {
+               u32                 Address32;
+               u64                 Address64;
+       } u;
+};
+
+struct MPI2_IEEE_SGE_SIMPLE32 {
+       u32                     Address;
+       u32                     FlagsLength;
+};
+
+struct MPI2_IEEE_SGE_CHAIN32 {
+       u32                     Address;
+       u32                     FlagsLength;
+};
+
+struct MPI2_IEEE_SGE_SIMPLE64 {
+       u64                     Address;
+       u32                     Length;
+       u16                     Reserved1;
+       u8                      Reserved2;
+       u8                      Flags;
+};
+
+struct MPI2_IEEE_SGE_CHAIN64 {
+       u64                     Address;
+       u32                     Length;
+       u16                     Reserved1;
+       u8                      Reserved2;
+       u8                      Flags;
+};
+
+union MPI2_IEEE_SGE_SIMPLE_UNION {
+       struct MPI2_IEEE_SGE_SIMPLE32  Simple32;
+       struct MPI2_IEEE_SGE_SIMPLE64  Simple64;
+};
+
+union MPI2_IEEE_SGE_CHAIN_UNION {
+       struct MPI2_IEEE_SGE_CHAIN32   Chain32;
+       struct MPI2_IEEE_SGE_CHAIN64   Chain64;
+};
+
+union MPI2_SGE_IO_UNION {
+       struct MPI2_SGE_SIMPLE_UNION       MpiSimple;
+       struct MPI2_SGE_CHAIN_UNION        MpiChain;
+       union MPI2_IEEE_SGE_SIMPLE_UNION  IeeeSimple;
+       union MPI2_IEEE_SGE_CHAIN_UNION   IeeeChain;
+};
+
+union MPI2_SCSI_IO_CDB_UNION {
+       u8                      CDB32[32];
+       struct MPI2_SCSI_IO_CDB_EEDP32 EEDP32;
+       struct MPI2_SGE_SIMPLE_UNION SGE;
+};
+
+/*
+ * RAID SCSI IO Request Message
+ * Total SGE count will be one less than  _MPI2_SCSI_IO_REQUEST
+ */
+struct MPI2_RAID_SCSI_IO_REQUEST {
+       u16                     DevHandle;                      /* 0x00 */
+       u8                      ChainOffset;                    /* 0x02 */
+       u8                      Function;                       /* 0x03 */
+       u16                     Reserved1;                      /* 0x04 */
+       u8                      Reserved2;                      /* 0x06 */
+       u8                      MsgFlags;                       /* 0x07 */
+       u8                      VP_ID;                          /* 0x08 */
+       u8                      VF_ID;                          /* 0x09 */
+       u16                     Reserved3;                      /* 0x0A */
+       u32                     SenseBufferLowAddress;          /* 0x0C */
+       u16                     SGLFlags;                       /* 0x10 */
+       u8                      SenseBufferLength;              /* 0x12 */
+       u8                      Reserved4;                      /* 0x13 */
+       u8                      SGLOffset0;                     /* 0x14 */
+       u8                      SGLOffset1;                     /* 0x15 */
+       u8                      SGLOffset2;                     /* 0x16 */
+       u8                      SGLOffset3;                     /* 0x17 */
+       u32                     SkipCount;                      /* 0x18 */
+       u32                     DataLength;                     /* 0x1C */
+       u32                     BidirectionalDataLength;        /* 0x20 */
+       u16                     IoFlags;                        /* 0x24 */
+       u16                     EEDPFlags;                      /* 0x26 */
+       u32                     EEDPBlockSize;                  /* 0x28 */
+       u32                     SecondaryReferenceTag;          /* 0x2C */
+       u16                     SecondaryApplicationTag;        /* 0x30 */
+       u16                     ApplicationTagTranslationMask;  /* 0x32 */
+       u8                      LUN[8];                         /* 0x34 */
+       u32                     Control;                        /* 0x3C */
+       union MPI2_SCSI_IO_CDB_UNION  CDB;                      /* 0x40 */
+       struct RAID_CONTEXT     RaidContext;                    /* 0x60 */
+       union MPI2_SGE_IO_UNION       SGL;                      /* 0x80 */
+};
+
+/*
+ * MPT RAID MFA IO Descriptor.
+ */
+struct MEGASAS_RAID_MFA_IO_REQUEST_DESCRIPTOR {
+       u32     RequestFlags:8;
+       u32     MessageAddress1:24; /* bits 31:8*/
+       u32     MessageAddress2;      /* bits 61:32 */
+};
+
+/* Default Request Descriptor */
+struct MPI2_DEFAULT_REQUEST_DESCRIPTOR {
+       u8              RequestFlags;               /* 0x00 */
+       u8              MSIxIndex;                  /* 0x01 */
+       u16             SMID;                       /* 0x02 */
+       u16             LMID;                       /* 0x04 */
+       u16             DescriptorTypeDependent;    /* 0x06 */
+};
+
+/* High Priority Request Descriptor */
+struct MPI2_HIGH_PRIORITY_REQUEST_DESCRIPTOR {
+       u8              RequestFlags;               /* 0x00 */
+       u8              MSIxIndex;                  /* 0x01 */
+       u16             SMID;                       /* 0x02 */
+       u16             LMID;                       /* 0x04 */
+       u16             Reserved1;                  /* 0x06 */
+};
+
+/* SCSI IO Request Descriptor */
+struct MPI2_SCSI_IO_REQUEST_DESCRIPTOR {
+       u8              RequestFlags;               /* 0x00 */
+       u8              MSIxIndex;                  /* 0x01 */
+       u16             SMID;                       /* 0x02 */
+       u16             LMID;                       /* 0x04 */
+       u16             DevHandle;                  /* 0x06 */
+};
+
+/* SCSI Target Request Descriptor */
+struct MPI2_SCSI_TARGET_REQUEST_DESCRIPTOR {
+       u8              RequestFlags;               /* 0x00 */
+       u8              MSIxIndex;                  /* 0x01 */
+       u16             SMID;                       /* 0x02 */
+       u16             LMID;                       /* 0x04 */
+       u16             IoIndex;                    /* 0x06 */
+};
+
+/* RAID Accelerator Request Descriptor */
+struct MPI2_RAID_ACCEL_REQUEST_DESCRIPTOR {
+       u8              RequestFlags;               /* 0x00 */
+       u8              MSIxIndex;                  /* 0x01 */
+       u16             SMID;                       /* 0x02 */
+       u16             LMID;                       /* 0x04 */
+       u16             Reserved;                   /* 0x06 */
+};
+
+/* union of Request Descriptors */
+union MEGASAS_REQUEST_DESCRIPTOR_UNION {
+       struct MPI2_DEFAULT_REQUEST_DESCRIPTOR             Default;
+       struct MPI2_HIGH_PRIORITY_REQUEST_DESCRIPTOR       HighPriority;
+       struct MPI2_SCSI_IO_REQUEST_DESCRIPTOR             SCSIIO;
+       struct MPI2_SCSI_TARGET_REQUEST_DESCRIPTOR         SCSITarget;
+       struct MPI2_RAID_ACCEL_REQUEST_DESCRIPTOR          RAIDAccelerator;
+       struct MEGASAS_RAID_MFA_IO_REQUEST_DESCRIPTOR      MFAIo;
+       union {
+               struct {
+                       u32 low;
+                       u32 high;
+               } u;
+               u64 Words;
+       };
+};
+
+/* Default Reply Descriptor */
+struct MPI2_DEFAULT_REPLY_DESCRIPTOR {
+       u8              ReplyFlags;                 /* 0x00 */
+       u8              MSIxIndex;                  /* 0x01 */
+       u16             DescriptorTypeDependent1;   /* 0x02 */
+       u32             DescriptorTypeDependent2;   /* 0x04 */
+};
+
+/* Address Reply Descriptor */
+struct MPI2_ADDRESS_REPLY_DESCRIPTOR {
+       u8              ReplyFlags;                 /* 0x00 */
+       u8              MSIxIndex;                  /* 0x01 */
+       u16             SMID;                       /* 0x02 */
+       u32             ReplyFrameAddress;          /* 0x04 */
+};
+
+/* SCSI IO Success Reply Descriptor */
+struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR {
+       u8              ReplyFlags;                 /* 0x00 */
+       u8              MSIxIndex;                  /* 0x01 */
+       u16             SMID;                       /* 0x02 */
+       u16             TaskTag;                    /* 0x04 */
+       u16             Reserved1;                  /* 0x06 */
+};
+
+/* TargetAssist Success Reply Descriptor */
+struct MPI2_TARGETASSIST_SUCCESS_REPLY_DESCRIPTOR {
+       u8              ReplyFlags;                 /* 0x00 */
+       u8              MSIxIndex;                  /* 0x01 */
+       u16             SMID;                       /* 0x02 */
+       u8              SequenceNumber;             /* 0x04 */
+       u8              Reserved1;                  /* 0x05 */
+       u16             IoIndex;                    /* 0x06 */
+};
+
+/* Target Command Buffer Reply Descriptor */
+struct MPI2_TARGET_COMMAND_BUFFER_REPLY_DESCRIPTOR {
+       u8              ReplyFlags;                 /* 0x00 */
+       u8              MSIxIndex;                  /* 0x01 */
+       u8              VP_ID;                      /* 0x02 */
+       u8              Flags;                      /* 0x03 */
+       u16             InitiatorDevHandle;         /* 0x04 */
+       u16             IoIndex;                    /* 0x06 */
+};
+
+/* RAID Accelerator Success Reply Descriptor */
+struct MPI2_RAID_ACCELERATOR_SUCCESS_REPLY_DESCRIPTOR {
+       u8              ReplyFlags;                 /* 0x00 */
+       u8              MSIxIndex;                  /* 0x01 */
+       u16             SMID;                       /* 0x02 */
+       u32             Reserved;                   /* 0x04 */
+};
+
+/* union of Reply Descriptors */
+union MPI2_REPLY_DESCRIPTORS_UNION {
+       struct MPI2_DEFAULT_REPLY_DESCRIPTOR                   Default;
+       struct MPI2_ADDRESS_REPLY_DESCRIPTOR                   AddressReply;
+       struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR           SCSIIOSuccess;
+       struct MPI2_TARGETASSIST_SUCCESS_REPLY_DESCRIPTOR TargetAssistSuccess;
+       struct MPI2_TARGET_COMMAND_BUFFER_REPLY_DESCRIPTOR TargetCommandBuffer;
+       struct MPI2_RAID_ACCELERATOR_SUCCESS_REPLY_DESCRIPTOR
+       RAIDAcceleratorSuccess;
+       u64                                             Words;
+};
+
+/* IOCInit Request message */
+struct MPI2_IOC_INIT_REQUEST {
+       u8                      WhoInit;                        /* 0x00 */
+       u8                      Reserved1;                      /* 0x01 */
+       u8                      ChainOffset;                    /* 0x02 */
+       u8                      Function;                       /* 0x03 */
+       u16                     Reserved2;                      /* 0x04 */
+       u8                      Reserved3;                      /* 0x06 */
+       u8                      MsgFlags;                       /* 0x07 */
+       u8                      VP_ID;                          /* 0x08 */
+       u8                      VF_ID;                          /* 0x09 */
+       u16                     Reserved4;                      /* 0x0A */
+       u16                     MsgVersion;                     /* 0x0C */
+       u16                     HeaderVersion;                  /* 0x0E */
+       u32                     Reserved5;                      /* 0x10 */
+       u16                     Reserved6;                      /* 0x14 */
+       u8                      Reserved7;                      /* 0x16 */
+       u8                      HostMSIxVectors;                /* 0x17 */
+       u16                     Reserved8;                      /* 0x18 */
+       u16                     SystemRequestFrameSize;         /* 0x1A */
+       u16                     ReplyDescriptorPostQueueDepth;  /* 0x1C */
+       u16                     ReplyFreeQueueDepth;            /* 0x1E */
+       u32                     SenseBufferAddressHigh;         /* 0x20 */
+       u32                     SystemReplyAddressHigh;         /* 0x24 */
+       u64                     SystemRequestFrameBaseAddress;  /* 0x28 */
+       u64                     ReplyDescriptorPostQueueAddress;/* 0x30 */
+       u64                     ReplyFreeQueueAddress;          /* 0x38 */
+       u64                     TimeStamp;                      /* 0x40 */
+};
+
+/* mrpriv defines */
+#define MR_PD_INVALID 0xFFFF
+#define MAX_SPAN_DEPTH 8
+#define MAX_RAIDMAP_SPAN_DEPTH (MAX_SPAN_DEPTH)
+#define MAX_ROW_SIZE 32
+#define MAX_RAIDMAP_ROW_SIZE (MAX_ROW_SIZE)
+#define MAX_LOGICAL_DRIVES 64
+#define MAX_RAIDMAP_LOGICAL_DRIVES (MAX_LOGICAL_DRIVES)
+#define MAX_RAIDMAP_VIEWS (MAX_LOGICAL_DRIVES)
+#define MAX_ARRAYS 128
+#define MAX_RAIDMAP_ARRAYS (MAX_ARRAYS)
+#define MAX_PHYSICAL_DEVICES 256
+#define MAX_RAIDMAP_PHYSICAL_DEVICES (MAX_PHYSICAL_DEVICES)
+#define MR_DCMD_LD_MAP_GET_INFO             0x0300e101
+
+struct MR_DEV_HANDLE_INFO {
+       u16     curDevHdl;
+       u8      validHandles;
+       u8      reserved;
+       u16     devHandle[2];
+};
+
+struct MR_ARRAY_INFO {
+       u16      pd[MAX_RAIDMAP_ROW_SIZE];
+};
+
+struct MR_QUAD_ELEMENT {
+       u64     logStart;
+       u64     logEnd;
+       u64     offsetInSpan;
+       u32     diff;
+       u32     reserved1;
+};
+
+struct MR_SPAN_INFO {
+       u32             noElements;
+       u32             reserved1;
+       struct MR_QUAD_ELEMENT quad[MAX_RAIDMAP_SPAN_DEPTH];
+};
+
+struct MR_LD_SPAN {
+       u64      startBlk;
+       u64      numBlks;
+       u16      arrayRef;
+       u8       reserved[6];
+};
+
+struct MR_SPAN_BLOCK_INFO {
+       u64          num_rows;
+       struct MR_LD_SPAN   span;
+       struct MR_SPAN_INFO block_span_info;
+};
+
+struct MR_LD_RAID {
+       struct {
+               u32     fpCapable:1;
+               u32     reserved5:3;
+               u32     ldPiMode:4;
+               u32     pdPiMode:4;
+               u32     encryptionType:8;
+               u32     fpWriteCapable:1;
+               u32     fpReadCapable:1;
+               u32     fpWriteAcrossStripe:1;
+               u32     fpReadAcrossStripe:1;
+               u32     reserved4:8;
+       } capability;
+       u32     reserved6;
+       u64     size;
+       u8      spanDepth;
+       u8      level;
+       u8      stripeShift;
+       u8      rowSize;
+       u8      rowDataSize;
+       u8      writeMode;
+       u8      PRL;
+       u8      SRL;
+       u16     targetId;
+       u8      ldState;
+       u8      regTypeReqOnWrite;
+       u8      modFactor;
+       u8      reserved2[1];
+       u16     seqNum;
+
+       struct {
+               u32 ldSyncRequired:1;
+               u32 reserved:31;
+       } flags;
+
+       u8      reserved3[0x5C];
+};
+
+struct MR_LD_SPAN_MAP {
+       struct MR_LD_RAID          ldRaid;
+       u8                  dataArmMap[MAX_RAIDMAP_ROW_SIZE];
+       struct MR_SPAN_BLOCK_INFO  spanBlock[MAX_RAIDMAP_SPAN_DEPTH];
+};
+
+struct MR_FW_RAID_MAP {
+       u32                 totalSize;
+       union {
+               struct {
+                       u32         maxLd;
+                       u32         maxSpanDepth;
+                       u32         maxRowSize;
+                       u32         maxPdCount;
+                       u32         maxArrays;
+               } validationInfo;
+               u32             version[5];
+               u32             reserved1[5];
+       };
+
+       u32                 ldCount;
+       u32                 Reserved1;
+       u8                  ldTgtIdToLd[MAX_RAIDMAP_LOGICAL_DRIVES+
+                                       MAX_RAIDMAP_VIEWS];
+       u8                  fpPdIoTimeoutSec;
+       u8                  reserved2[7];
+       struct MR_ARRAY_INFO       arMapInfo[MAX_RAIDMAP_ARRAYS];
+       struct MR_DEV_HANDLE_INFO  devHndlInfo[MAX_RAIDMAP_PHYSICAL_DEVICES];
+       struct MR_LD_SPAN_MAP      ldSpanMap[1];
+};
+
+struct IO_REQUEST_INFO {
+       u64 ldStartBlock;
+       u32 numBlocks;
+       u16 ldTgtId;
+       u8 isRead;
+       u16 devHandle;
+       u64 pdBlock;
+       u8 fpOkForIo;
+};
+
+struct MR_LD_TARGET_SYNC {
+       u8  targetId;
+       u8  reserved;
+       u16 seqNum;
+};
+
+#define IEEE_SGE_FLAGS_ADDR_MASK            (0x03)
+#define IEEE_SGE_FLAGS_SYSTEM_ADDR          (0x00)
+#define IEEE_SGE_FLAGS_IOCDDR_ADDR          (0x01)
+#define IEEE_SGE_FLAGS_IOCPLB_ADDR          (0x02)
+#define IEEE_SGE_FLAGS_IOCPLBNTA_ADDR       (0x03)
+#define IEEE_SGE_FLAGS_CHAIN_ELEMENT        (0x80)
+#define IEEE_SGE_FLAGS_END_OF_LIST          (0x40)
+
+struct megasas_register_set;
+struct megasas_instance;
+
+union desc_word {
+       u64 word;
+       struct {
+               u32 low;
+               u32 high;
+       } u;
+};
+
+struct megasas_cmd_fusion {
+       struct MPI2_RAID_SCSI_IO_REQUEST        *io_request;
+       dma_addr_t                      io_request_phys_addr;
+
+       union MPI2_SGE_IO_UNION *sg_frame;
+       dma_addr_t              sg_frame_phys_addr;
+
+       u8 *sense;
+       dma_addr_t sense_phys_addr;
+
+       struct list_head list;
+       struct scsi_cmnd *scmd;
+       struct megasas_instance *instance;
+
+       u8 retry_for_fw_reset;
+       union MEGASAS_REQUEST_DESCRIPTOR_UNION  *request_desc;
+
+       /*
+        * Context for a MFI frame.
+        * Used to get the mfi cmd from list when a MFI cmd is completed
+        */
+       u32 sync_cmd_idx;
+       u32 index;
+       u8 flags;
+};
+
+struct LD_LOAD_BALANCE_INFO {
+       u8      loadBalanceFlag;
+       u8      reserved1;
+       u16     raid1DevHandle[2];
+       atomic_t     scsi_pending_cmds[2];
+       u64     last_accessed_block[2];
+};
+
+struct MR_FW_RAID_MAP_ALL {
+       struct MR_FW_RAID_MAP raidMap;
+       struct MR_LD_SPAN_MAP ldSpanMap[MAX_LOGICAL_DRIVES - 1];
+} __attribute__ ((packed));
+
+struct fusion_context {
+       struct megasas_cmd_fusion **cmd_list;
+       struct list_head cmd_pool;
+
+       spinlock_t cmd_pool_lock;
+
+       dma_addr_t req_frames_desc_phys;
+       u8 *req_frames_desc;
+
+       struct dma_pool *io_request_frames_pool;
+       dma_addr_t io_request_frames_phys;
+       u8 *io_request_frames;
+
+       struct dma_pool *sg_dma_pool;
+       struct dma_pool *sense_dma_pool;
+
+       dma_addr_t reply_frames_desc_phys;
+       union MPI2_REPLY_DESCRIPTORS_UNION *reply_frames_desc;
+       struct dma_pool *reply_frames_desc_pool;
+
+       u16 last_reply_idx;
+
+       u32 reply_q_depth;
+       u32 request_alloc_sz;
+       u32 reply_alloc_sz;
+       u32 io_frames_alloc_sz;
+
+       u16     max_sge_in_main_msg;
+       u16     max_sge_in_chain;
+
+       u8      chain_offset_io_request;
+       u8      chain_offset_mfi_pthru;
+
+       struct MR_FW_RAID_MAP_ALL *ld_map[2];
+       dma_addr_t ld_map_phys[2];
+
+       u32 map_sz;
+       u8 fast_path_io;
+       struct LD_LOAD_BALANCE_INFO load_balance_info[MAX_LOGICAL_DRIVES];
+};
+
+union desc_value {
+       u64 word;
+       struct {
+               u32 low;
+               u32 high;
+       } u;
+};
+
+#endif /* _MEGARAID_SAS_FUSION_H_ */