/*
 * node.c
 *
 * DSP-BIOS Bridge driver support functions for TI OMAP processors.
 *
 * DSP/BIOS Bridge Node Manager.
 *
 * Copyright (C) 2005-2006 Texas Instruments, Inc.
 *
 * This package is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#include <linux/types.h>
#include <linux/bitmap.h>
#include <linux/list.h>

/*  ----------------------------------- Host OS */
#include <dspbridge/host_os.h>

/*  ----------------------------------- DSP/BIOS Bridge */
#include <dspbridge/dbdefs.h>

/*  ----------------------------------- OS Adaptation Layer */
#include <dspbridge/memdefs.h>
#include <dspbridge/proc.h>
#include <dspbridge/strm.h>
#include <dspbridge/sync.h>
#include <dspbridge/ntfy.h>

/*  ----------------------------------- Platform Manager */
#include <dspbridge/cmm.h>
#include <dspbridge/cod.h>
#include <dspbridge/dev.h>
#include <dspbridge/msg.h>

/*  ----------------------------------- Resource Manager */
#include <dspbridge/dbdcd.h>
#include <dspbridge/disp.h>
#include <dspbridge/rms_sh.h>

/*  ----------------------------------- Link Driver */
#include <dspbridge/dspdefs.h>
#include <dspbridge/dspioctl.h>

/*  ----------------------------------- Others */
#include <dspbridge/uuidutil.h>

/*  ----------------------------------- This */
#include <dspbridge/nodepriv.h>
#include <dspbridge/node.h>
#include <dspbridge/dmm.h>

/* Static/Dynamic Loader includes */
#include <dspbridge/dbll.h>
#include <dspbridge/nldr.h>

#include <dspbridge/drv.h>
#include <dspbridge/resourcecleanup.h>
#include <_tiomap.h>

#include <dspbridge/dspdeh.h>

#define HOSTPREFIX        "/host"
#define PIPEPREFIX        "/dbpipe"

#define MAX_INPUTS(h)  \
                ((h)->dcd_props.obj_data.node_obj.ndb_props.num_input_streams)
#define MAX_OUTPUTS(h) \
                ((h)->dcd_props.obj_data.node_obj.ndb_props.num_output_streams)

#define NODE_GET_PRIORITY(h) ((h)->prio)
#define NODE_SET_PRIORITY(hnode, prio) ((hnode)->prio = prio)
#define NODE_SET_STATE(hnode, state) ((hnode)->node_state = state)

#define MAXPIPES        100     /* Max # of /pipe connections (CSL limit) */
#define MAXDEVSUFFIXLEN 2       /* Max(Log base 10 of MAXPIPES, MAXSTREAMS) */

#define PIPENAMELEN     (sizeof(PIPEPREFIX) + MAXDEVSUFFIXLEN)
#define HOSTNAMELEN     (sizeof(HOSTPREFIX) + MAXDEVSUFFIXLEN)

#define MAXDEVNAMELEN   32      /* dsp_ndbprops.ac_name size */
#define CREATEPHASE     1
#define EXECUTEPHASE    2
#define DELETEPHASE     3

/* Define default STRM parameters */
/*
 *  TBD: Put in header file, make global DSP_STRMATTRS with defaults,
 *  or make defaults configurable.
 */
#define DEFAULTBUFSIZE          32
#define DEFAULTNBUFS            2
#define DEFAULTSEGID            0
#define DEFAULTALIGNMENT        0
#define DEFAULTTIMEOUT          10000

#define RMSQUERYSERVER          0
#define RMSCONFIGURESERVER      1
#define RMSCREATENODE           2
#define RMSEXECUTENODE          3
#define RMSDELETENODE           4
#define RMSCHANGENODEPRIORITY   5
#define RMSREADMEMORY           6
#define RMSWRITEMEMORY          7
#define RMSCOPY                 8
#define MAXTIMEOUT              2000

#define NUMRMSFXNS              9

#define PWR_TIMEOUT             500     /* default PWR timeout in msec */

#define STACKSEGLABEL "L1DSRAM_HEAP"    /* Label for DSP Stack Segment Addr */

/*
 *  ======== node_mgr ========
 */
struct node_mgr {
        struct dev_object *dev_obj;     /* Device object */
        /* Function interface to Bridge driver */
        struct bridge_drv_interface *intf_fxns;
        struct dcd_manager *dcd_mgr;    /* Proc/Node data manager */
        struct disp_object *disp_obj;   /* Node dispatcher */
        struct list_head node_list;     /* List of all allocated nodes */
        u32 num_nodes;          /* Number of nodes in node_list */
        u32 num_created;        /* Number of nodes *created* on DSP */
        DECLARE_BITMAP(pipe_map, MAXPIPES); /* Pipe connection bitmap */
        DECLARE_BITMAP(pipe_done_map, MAXPIPES); /* Pipes that are half free */
        /* Channel allocation bitmap */
        DECLARE_BITMAP(chnl_map, CHNL_MAXCHANNELS);
        /* DMA Channel allocation bitmap */
        DECLARE_BITMAP(dma_chnl_map, CHNL_MAXCHANNELS);
        /* Zero-Copy Channel alloc bitmap */
        DECLARE_BITMAP(zc_chnl_map, CHNL_MAXCHANNELS);
        struct ntfy_object *ntfy_obj;   /* Manages registered notifications */
        struct mutex node_mgr_lock;     /* For critical sections */
        u32 fxn_addrs[NUMRMSFXNS];      /* RMS function addresses */
        struct msg_mgr *msg_mgr_obj;

        /* Processor properties needed by Node Dispatcher */
        u32 num_chnls;          /* Total number of channels */
        u32 chnl_offset;        /* Offset of chnl ids rsvd for RMS */
        u32 chnl_buf_size;      /* Buffer size for data to RMS */
        int proc_family;        /* eg, 5000 */
        int proc_type;          /* eg, 5510 */
        u32 dsp_word_size;      /* Size of DSP word on host bytes */
        u32 dsp_data_mau_size;  /* Size of DSP data MAU */
        u32 dsp_mau_size;       /* Size of MAU */
        s32 min_pri;            /* Minimum runtime priority for node */
        s32 max_pri;            /* Maximum runtime priority for node */

        struct strm_mgr *strm_mgr_obj;  /* STRM manager */

        /* Loader properties */
        struct nldr_object *nldr_obj;   /* Handle to loader */
        struct node_ldr_fxns nldr_fxns; /* Handle to loader functions */
};

/*
 *  ======== connecttype ========
 */
enum connecttype {
        NOTCONNECTED = 0,
        NODECONNECT,
        HOSTCONNECT,
        DEVICECONNECT,
};

/*
 *  ======== stream_chnl ========
 */
struct stream_chnl {
        enum connecttype type;  /* Type of stream connection */
        u32 dev_id;             /* pipe or channel id */
};

/*
 *  ======== node_object ========
 */
struct node_object {
        struct list_head list_elem;
        struct node_mgr *node_mgr;      /* The manager of this node */
        struct proc_object *processor;  /* Back pointer to processor */
        struct dsp_uuid node_uuid;      /* Node's ID */
        s32 prio;               /* Node's current priority */
        u32 timeout;            /* Timeout for blocking NODE calls */
        u32 heap_size;          /* Heap Size */
        u32 dsp_heap_virt_addr; /* Heap Size */
        u32 gpp_heap_virt_addr; /* Heap Size */
        enum node_type ntype;   /* Type of node: message, task, etc */
        enum node_state node_state;     /* NODE_ALLOCATED, NODE_CREATED, ... */
        u32 num_inputs;         /* Current number of inputs */
        u32 num_outputs;        /* Current number of outputs */
        u32 max_input_index;    /* Current max input stream index */
        u32 max_output_index;   /* Current max output stream index */
        struct stream_chnl *inputs;     /* Node's input streams */
        struct stream_chnl *outputs;    /* Node's output streams */
        struct node_createargs create_args;     /* Args for node create func */
        nodeenv node_env;       /* Environment returned by RMS */
        struct dcd_genericobj dcd_props;        /* Node properties from DCD */
        struct dsp_cbdata *args;        /* Optional args to pass to node */
        struct ntfy_object *ntfy_obj;   /* Manages registered notifications */
        char *str_dev_name;     /* device name, if device node */
        struct sync_object *sync_done;  /* Synchronize node_terminate */
        s32 exit_status;        /* execute function return status */

        /* Information needed for node_get_attr() */
        void *device_owner;     /* If dev node, task that owns it */
        u32 num_gpp_inputs;     /* Current # of from GPP streams */
        u32 num_gpp_outputs;    /* Current # of to GPP streams */
        /* Current stream connections */
        struct dsp_streamconnect *stream_connect;

        /* Message queue */
        struct msg_queue *msg_queue_obj;

        /* These fields used for SM messaging */
        struct cmm_xlatorobject *xlator;        /* Node's SM addr translator */

        /* Handle to pass to dynamic loader */
        struct nldr_nodeobject *nldr_node_obj;
        bool loaded;            /* Code is (dynamically) loaded */
        bool phase_split;       /* Phases split in many libs or ovly */

};

/* Default buffer attributes */
static struct dsp_bufferattr node_dfltbufattrs = {
        .cb_struct = 0,
        .segment_id = 1,
        .buf_alignment = 0,
};

static void delete_node(struct node_object *hnode,
                        struct process_context *pr_ctxt);
static void delete_node_mgr(struct node_mgr *hnode_mgr);
static void fill_stream_connect(struct node_object *node1,
                                struct node_object *node2, u32 stream1,
                                u32 stream2);
static void fill_stream_def(struct node_object *hnode,
                            struct node_strmdef *pstrm_def,
                            struct dsp_strmattr *pattrs);
static void free_stream(struct node_mgr *hnode_mgr, struct stream_chnl stream);
static int get_fxn_address(struct node_object *hnode, u32 * fxn_addr,
                                  u32 phase);
static int get_node_props(struct dcd_manager *hdcd_mgr,
                                 struct node_object *hnode,
                                 const struct dsp_uuid *node_uuid,
                                 struct dcd_genericobj *dcd_prop);
static int get_proc_props(struct node_mgr *hnode_mgr,
                                 struct dev_object *hdev_obj);
static int get_rms_fxns(struct node_mgr *hnode_mgr);
static u32 ovly(void *priv_ref, u32 dsp_run_addr, u32 dsp_load_addr,
                u32 ul_num_bytes, u32 mem_space);
static u32 mem_write(void *priv_ref, u32 dsp_add, void *pbuf,
                     u32 ul_num_bytes, u32 mem_space);

/* Dynamic loader functions. */
static struct node_ldr_fxns nldr_fxns = {
        nldr_allocate,
        nldr_create,
        nldr_delete,
        nldr_get_fxn_addr,
        nldr_load,
        nldr_unload,
};

enum node_state node_get_state(void *hnode)
{
        struct node_object *pnode = (struct node_object *)hnode;
        if (!pnode)
                return -1;
        return pnode->node_state;
}

/*
 *  ======== node_allocate ========
 *  Purpose:
 *      Allocate GPP resources to manage a node on the DSP.
 */
int node_allocate(struct proc_object *hprocessor,
                        const struct dsp_uuid *node_uuid,
                        const struct dsp_cbdata *pargs,
                        const struct dsp_nodeattrin *attr_in,
                        struct node_res_object **noderes,
                        struct process_context *pr_ctxt)
{
        struct node_mgr *hnode_mgr;
        struct dev_object *hdev_obj;
        struct node_object *pnode = NULL;
        enum node_type node_type = NODE_TASK;
        struct node_msgargs *pmsg_args;
        struct node_taskargs *ptask_args;
        u32 num_streams;
        struct bridge_drv_interface *intf_fxns;
        int status = 0;
        struct cmm_object *hcmm_mgr = NULL;     /* Shared memory manager hndl */
        u32 proc_id;
        u32 pul_value;
        u32 dynext_base;
        u32 off_set = 0;
        u32 ul_stack_seg_val;
        struct cfg_hostres *host_res;
        struct bridge_dev_context *pbridge_context;
        u32 mapped_addr = 0;
        u32 map_attrs = 0x0;
        struct dsp_processorstate proc_state;
#ifdef DSP_DMM_DEBUG
        struct dmm_object *dmm_mgr;
        struct proc_object *p_proc_object = (struct proc_object *)hprocessor;
#endif

        void *node_res;

        *noderes = NULL;

        status = proc_get_processor_id(hprocessor, &proc_id);

        if (proc_id != DSP_UNIT)
                goto func_end;

        status = proc_get_dev_object(hprocessor, &hdev_obj);
        if (!status) {
                status = dev_get_node_manager(hdev_obj, &hnode_mgr);
                if (hnode_mgr == NULL)
                        status = -EPERM;

        }

        if (status)
                goto func_end;

        status = dev_get_bridge_context(hdev_obj, &pbridge_context);
        if (!pbridge_context) {
                status = -EFAULT;
                goto func_end;
        }

        status = proc_get_state(hprocessor, &proc_state,
                                sizeof(struct dsp_processorstate));
        if (status)
                goto func_end;
        /* If processor is in error state then don't attempt
           to send the message */
        if (proc_state.proc_state == PROC_ERROR) {
                status = -EPERM;
                goto func_end;
        }

        /* Assuming that 0 is not a valid function address */
        if (hnode_mgr->fxn_addrs[0] == 0) {
                /* No RMS on target - we currently can't handle this */
                pr_err("%s: Failed, no RMS in base image\n", __func__);
                status = -EPERM;
        } else {
                /* Validate attr_in fields, if non-NULL */
                if (attr_in) {
                        /* Check if attr_in->prio is within range */
                        if (attr_in->prio < hnode_mgr->min_pri ||
                            attr_in->prio > hnode_mgr->max_pri)
                                status = -EDOM;
                }
        }
        /* Allocate node object and fill in */
        if (status)
                goto func_end;

        pnode = kzalloc(sizeof(struct node_object), GFP_KERNEL);
        if (pnode == NULL) {
                status = -ENOMEM;
                goto func_end;
        }
        pnode->node_mgr = hnode_mgr;
        /* This critical section protects get_node_props */
        mutex_lock(&hnode_mgr->node_mgr_lock);

        /* Get dsp_ndbprops from node database */
        status = get_node_props(hnode_mgr->dcd_mgr, pnode, node_uuid,
                                &(pnode->dcd_props));
        if (status)
                goto func_cont;

        pnode->node_uuid = *node_uuid;
        pnode->processor = hprocessor;
        pnode->ntype = pnode->dcd_props.obj_data.node_obj.ndb_props.ntype;
        pnode->timeout = pnode->dcd_props.obj_data.node_obj.ndb_props.timeout;
        pnode->prio = pnode->dcd_props.obj_data.node_obj.ndb_props.prio;

        /* Currently only C64 DSP builds support Node Dynamic * heaps */
        /* Allocate memory for node heap */
        pnode->create_args.asa.task_arg_obj.heap_size = 0;
        pnode->create_args.asa.task_arg_obj.dsp_heap_addr = 0;
        pnode->create_args.asa.task_arg_obj.dsp_heap_res_addr = 0;
        pnode->create_args.asa.task_arg_obj.gpp_heap_addr = 0;
        if (!attr_in)
                goto func_cont;

        /* Check if we have a user allocated node heap */
        if (!(attr_in->pgpp_virt_addr))
                goto func_cont;

        /* check for page aligned Heap size */
        if (((attr_in->heap_size) & (PG_SIZE4K - 1))) {
                pr_err("%s: node heap size not aligned to 4K, size = 0x%x \n",
                       __func__, attr_in->heap_size);
                status = -EINVAL;
        } else {
                pnode->create_args.asa.task_arg_obj.heap_size =
                    attr_in->heap_size;
                pnode->create_args.asa.task_arg_obj.gpp_heap_addr =
                    (u32) attr_in->pgpp_virt_addr;
        }
        if (status)
                goto func_cont;

        status = proc_reserve_memory(hprocessor,
                                     pnode->create_args.asa.task_arg_obj.
                                     heap_size + PAGE_SIZE,
                                     (void **)&(pnode->create_args.asa.
                                        task_arg_obj.dsp_heap_res_addr),
                                     pr_ctxt);
        if (status) {
                pr_err("%s: Failed to reserve memory for heap: 0x%x\n",
                       __func__, status);
                goto func_cont;
        }
#ifdef DSP_DMM_DEBUG
        status = dmm_get_handle(p_proc_object, &dmm_mgr);
        if (!dmm_mgr) {
                status = DSP_EHANDLE;
                goto func_cont;
        }

        dmm_mem_map_dump(dmm_mgr);
#endif

        map_attrs |= DSP_MAPLITTLEENDIAN;
        map_attrs |= DSP_MAPELEMSIZE32;
        map_attrs |= DSP_MAPVIRTUALADDR;
        status = proc_map(hprocessor, (void *)attr_in->pgpp_virt_addr,
                          pnode->create_args.asa.task_arg_obj.heap_size,
                          (void *)pnode->create_args.asa.task_arg_obj.
                          dsp_heap_res_addr, (void **)&mapped_addr, map_attrs,
                          pr_ctxt);
        if (status)
                pr_err("%s: Failed to map memory for Heap: 0x%x\n",
                       __func__, status);
        else
                pnode->create_args.asa.task_arg_obj.dsp_heap_addr =
                    (u32) mapped_addr;

func_cont:
        mutex_unlock(&hnode_mgr->node_mgr_lock);
        if (attr_in != NULL) {
                /* Overrides of NBD properties */
                pnode->timeout = attr_in->timeout;
                pnode->prio = attr_in->prio;
        }
        /* Create object to manage notifications */
        if (!status) {
                pnode->ntfy_obj = kmalloc(sizeof(struct ntfy_object),
                                                        GFP_KERNEL);
                if (pnode->ntfy_obj)
                        ntfy_init(pnode->ntfy_obj);
                else
                        status = -ENOMEM;
        }

        if (!status) {
                node_type = node_get_type(pnode);
                /*  Allocate dsp_streamconnect array for device, task, and
                 *  dais socket nodes. */
                if (node_type != NODE_MESSAGE) {
                        num_streams = MAX_INPUTS(pnode) + MAX_OUTPUTS(pnode);
                        pnode->stream_connect = kzalloc(num_streams *
                                        sizeof(struct dsp_streamconnect),
                                        GFP_KERNEL);
                        if (num_streams > 0 && pnode->stream_connect == NULL)
                                status = -ENOMEM;

                }
                if (!status && (node_type == NODE_TASK ||
                                              node_type == NODE_DAISSOCKET)) {
                        /* Allocate arrays for maintainig stream connections */
                        pnode->inputs = kzalloc(MAX_INPUTS(pnode) *
                                        sizeof(struct stream_chnl), GFP_KERNEL);
                        pnode->outputs = kzalloc(MAX_OUTPUTS(pnode) *
                                        sizeof(struct stream_chnl), GFP_KERNEL);
                        ptask_args = &(pnode->create_args.asa.task_arg_obj);
                        ptask_args->strm_in_def = kzalloc(MAX_INPUTS(pnode) *
                                                sizeof(struct node_strmdef),
                                                GFP_KERNEL);
                        ptask_args->strm_out_def = kzalloc(MAX_OUTPUTS(pnode) *
                                                sizeof(struct node_strmdef),
                                                GFP_KERNEL);
                        if ((MAX_INPUTS(pnode) > 0 && (pnode->inputs == NULL ||
                                                       ptask_args->strm_in_def
                                                       == NULL))
                            || (MAX_OUTPUTS(pnode) > 0
                                && (pnode->outputs == NULL
                                    || ptask_args->strm_out_def == NULL)))
                                status = -ENOMEM;
                }
        }
        if (!status && (node_type != NODE_DEVICE)) {
                /* Create an event that will be posted when RMS_EXIT is
                 * received. */
                pnode->sync_done = kzalloc(sizeof(struct sync_object),
                                                                GFP_KERNEL);
                if (pnode->sync_done)
                        sync_init_event(pnode->sync_done);
                else
                        status = -ENOMEM;

                if (!status) {
                        /*Get the shared mem mgr for this nodes dev object */
                        status = cmm_get_handle(hprocessor, &hcmm_mgr);
                        if (!status) {
                                /* Allocate a SM addr translator for this node
                                 * w/ deflt attr */
                                status = cmm_xlator_create(&pnode->xlator,
                                                           hcmm_mgr, NULL);
                        }
                }
                if (!status) {
                        /* Fill in message args */
                        if ((pargs != NULL) && (pargs->cb_data > 0)) {
                                pmsg_args =
                                    &(pnode->create_args.asa.node_msg_args);
                                pmsg_args->pdata = kzalloc(pargs->cb_data,
                                                                GFP_KERNEL);
                                if (pmsg_args->pdata == NULL) {
                                        status = -ENOMEM;
                                } else {
                                        pmsg_args->arg_length = pargs->cb_data;
                                        memcpy(pmsg_args->pdata,
                                               pargs->node_data,
                                               pargs->cb_data);
                                }
                        }
                }
        }

        if (!status && node_type != NODE_DEVICE) {
                /* Create a message queue for this node */
                intf_fxns = hnode_mgr->intf_fxns;
                status =
                    (*intf_fxns->msg_create_queue) (hnode_mgr->msg_mgr_obj,
                                                        &pnode->msg_queue_obj,
                                                        0,
                                                        pnode->create_args.asa.
                                                        node_msg_args.max_msgs,
                                                        pnode);
        }

        if (!status) {
                /* Create object for dynamic loading */

                status = hnode_mgr->nldr_fxns.allocate(hnode_mgr->nldr_obj,
                                                           (void *)pnode,
                                                           &pnode->dcd_props.
                                                           obj_data.node_obj,
                                                           &pnode->
                                                           nldr_node_obj,
                                                           &pnode->phase_split);
        }

        /* Compare value read from Node Properties and check if it is same as
         * STACKSEGLABEL, if yes read the Address of STACKSEGLABEL, calculate
         * GPP Address, Read the value in that address and override the
         * stack_seg value in task args */
        if (!status &&
            (char *)pnode->dcd_props.obj_data.node_obj.ndb_props.
            stack_seg_name != NULL) {
                if (strcmp((char *)
                           pnode->dcd_props.obj_data.node_obj.ndb_props.
                           stack_seg_name, STACKSEGLABEL) == 0) {
                        void __iomem *stack_seg;
                        u32 stack_seg_pa;

                        status =
                            hnode_mgr->nldr_fxns.
                            get_fxn_addr(pnode->nldr_node_obj, "DYNEXT_BEG",
                                             &dynext_base);
                        if (status)
                                pr_err("%s: Failed to get addr for DYNEXT_BEG"
                                       " status = 0x%x\n", __func__, status);

                        status =
                            hnode_mgr->nldr_fxns.
                            get_fxn_addr(pnode->nldr_node_obj,
                                             "L1DSRAM_HEAP", &pul_value);

                        if (status)
                                pr_err("%s: Failed to get addr for L1DSRAM_HEAP"
                                       " status = 0x%x\n", __func__, status);

                        host_res = pbridge_context->resources;
                        if (!host_res)
                                status = -EPERM;

                        if (status) {
                                pr_err("%s: Failed to get host resource, status"
                                       " = 0x%x\n", __func__, status);
                                goto func_end;
                        }

                        off_set = pul_value - dynext_base;
                        stack_seg_pa = host_res->mem_phys[1] + off_set;
                        stack_seg = ioremap(stack_seg_pa, SZ_32);
                        if (!stack_seg) {
                                status = -ENOMEM;
                                goto func_end;
                        }

                        ul_stack_seg_val = readl(stack_seg);

                        iounmap(stack_seg);

                        dev_dbg(bridge, "%s: StackSegVal = 0x%x, StackSegAddr ="
                                " 0x%x\n", __func__, ul_stack_seg_val,
                                host_res->mem_base[1] + off_set);

                        pnode->create_args.asa.task_arg_obj.stack_seg =
                            ul_stack_seg_val;

                }
        }

        if (!status) {
                /* Add the node to the node manager's list of allocated
                 * nodes. */
                NODE_SET_STATE(pnode, NODE_ALLOCATED);

                mutex_lock(&hnode_mgr->node_mgr_lock);

                list_add_tail(&pnode->list_elem, &hnode_mgr->node_list);
                ++(hnode_mgr->num_nodes);

                /* Exit critical section */
                mutex_unlock(&hnode_mgr->node_mgr_lock);

                /* Preset this to assume phases are split
                 * (for overlay and dll) */
                pnode->phase_split = true;

                /* Notify all clients registered for DSP_NODESTATECHANGE. */
                proc_notify_all_clients(hprocessor, DSP_NODESTATECHANGE);
        } else {
                /* Cleanup */
                if (pnode)
                        delete_node(pnode, pr_ctxt);

        }

        if (!status) {
                status = drv_insert_node_res_element(pnode, &node_res, pr_ctxt);
                if (status) {
                        delete_node(pnode, pr_ctxt);
                        goto func_end;
                }

                *noderes = (struct node_res_object *)node_res;
                drv_proc_node_update_heap_status(node_res, true);
                drv_proc_node_update_status(node_res, true);
        }
func_end:
        dev_dbg(bridge, "%s: hprocessor: %p pNodeId: %p pargs: %p attr_in: %p "
                "node_res: %p status: 0x%x\n", __func__, hprocessor,
                node_uuid, pargs, attr_in, noderes, status);
        return status;
}

/*
 *  ======== node_alloc_msg_buf ========
 *  Purpose:
 *      Allocates buffer for zero copy messaging.
 */
DBAPI node_alloc_msg_buf(struct node_object *hnode, u32 usize,
                         struct dsp_bufferattr *pattr,
                         u8 **pbuffer)
{
        struct node_object *pnode = (struct node_object *)hnode;
        int status = 0;
        bool va_flag = false;
        bool set_info;
        u32 proc_id;

        if (!pnode)
                status = -EFAULT;
        else if (node_get_type(pnode) == NODE_DEVICE)
                status = -EPERM;

        if (status)
                goto func_end;

        if (pattr == NULL)
                pattr = &node_dfltbufattrs;     /* set defaults */

        status = proc_get_processor_id(pnode->processor, &proc_id);
        if (proc_id != DSP_UNIT) {
                goto func_end;
        }
        /*  If segment ID includes MEM_SETVIRTUALSEGID then pbuffer is a
         *  virt  address, so set this info in this node's translator
         *  object for  future ref. If MEM_GETVIRTUALSEGID then retrieve
         *  virtual address  from node's translator. */
        if ((pattr->segment_id & MEM_SETVIRTUALSEGID) ||
            (pattr->segment_id & MEM_GETVIRTUALSEGID)) {
                va_flag = true;
                set_info = (pattr->segment_id & MEM_SETVIRTUALSEGID) ?
                    true : false;
                /* Clear mask bits */
                pattr->segment_id &= ~MEM_MASKVIRTUALSEGID;
                /* Set/get this node's translators virtual address base/size */
                status = cmm_xlator_info(pnode->xlator, pbuffer, usize,
                                         pattr->segment_id, set_info);
        }
        if (!status && (!va_flag)) {
                if (pattr->segment_id != 1) {
                        /* Node supports single SM segment only. */
                        status = -EBADR;
                }
                /*  Arbitrary SM buffer alignment not supported for host side
                 *  allocs, but guaranteed for the following alignment
                 *  values. */
                switch (pattr->buf_alignment) {
                case 0:
                case 1:
                case 2:
                case 4:
                        break;
                default:
                        /* alignment value not supportted */
                        status = -EPERM;
                        break;
                }
                if (!status) {
                        /* allocate physical buffer from seg_id in node's
                         * translator */
                        (void)cmm_xlator_alloc_buf(pnode->xlator, pbuffer,
                                                   usize);
                        if (*pbuffer == NULL) {
                                pr_err("%s: error - Out of shared memory\n",
                                       __func__);
                                status = -ENOMEM;
                        }
                }
        }
func_end:
        return status;
}

/*
 *  ======== node_change_priority ========
 *  Purpose:
 *      Change the priority of a node in the allocated state, or that is
 *      currently running or paused on the target.
 */
int node_change_priority(struct node_object *hnode, s32 prio)
{
        struct node_object *pnode = (struct node_object *)hnode;
        struct node_mgr *hnode_mgr = NULL;
        enum node_type node_type;
        enum node_state state;
        int status = 0;
        u32 proc_id;

        if (!hnode || !hnode->node_mgr) {
                status = -EFAULT;
        } else {
                hnode_mgr = hnode->node_mgr;
                node_type = node_get_type(hnode);
                if (node_type != NODE_TASK && node_type != NODE_DAISSOCKET)
                        status = -EPERM;
                else if (prio < hnode_mgr->min_pri || prio > hnode_mgr->max_pri)
                        status = -EDOM;
        }
        if (status)
                goto func_end;

        /* Enter critical section */
        mutex_lock(&hnode_mgr->node_mgr_lock);

        state = node_get_state(hnode);
        if (state == NODE_ALLOCATED || state == NODE_PAUSED) {
                NODE_SET_PRIORITY(hnode, prio);
        } else {
                if (state != NODE_RUNNING) {
                        status = -EBADR;
                        goto func_cont;
                }
                status = proc_get_processor_id(pnode->processor, &proc_id);
                if (proc_id == DSP_UNIT) {
                        status =
                            disp_node_change_priority(hnode_mgr->disp_obj,
                                                      hnode,
                                                      hnode_mgr->fxn_addrs
                                                      [RMSCHANGENODEPRIORITY],
                                                      hnode->node_env, prio);
                }
                if (status >= 0)
                        NODE_SET_PRIORITY(hnode, prio);

        }
func_cont:
        /* Leave critical section */
        mutex_unlock(&hnode_mgr->node_mgr_lock);
func_end:
        return status;
}

/*
 *  ======== node_connect ========
 *  Purpose:
 *      Connect two nodes on the DSP, or a node on the DSP to the GPP.
 */
int node_connect(struct node_object *node1, u32 stream1,
                        struct node_object *node2,
                        u32 stream2, struct dsp_strmattr *pattrs,
                        struct dsp_cbdata *conn_param)
{
        struct node_mgr *hnode_mgr;
        char *pstr_dev_name = NULL;
        enum node_type node1_type = NODE_TASK;
        enum node_type node2_type = NODE_TASK;
        enum dsp_strmmode strm_mode;
        struct node_strmdef *pstrm_def;
        struct node_strmdef *input = NULL;
        struct node_strmdef *output = NULL;
        struct node_object *dev_node_obj;
        struct node_object *hnode;
        struct stream_chnl *pstream;
        u32 pipe_id;
        u32 chnl_id;
        s8 chnl_mode;
        u32 dw_length;
        int status = 0;

        if (!node1 || !node2)
                return -EFAULT;

        /* The two nodes must be on the same processor */
        if (node1 != (struct node_object *)DSP_HGPPNODE &&
                        node2 != (struct node_object *)DSP_HGPPNODE &&
                        node1->node_mgr != node2->node_mgr)
                return -EPERM;

        /* Cannot connect a node to itself */
        if (node1 == node2)
                return -EPERM;

        /* node_get_type() will return NODE_GPP if hnode =  DSP_HGPPNODE. */
        node1_type = node_get_type(node1);
        node2_type = node_get_type(node2);
        /* Check stream indices ranges */
        if ((node1_type != NODE_GPP && node1_type != NODE_DEVICE &&
                                stream1 >= MAX_OUTPUTS(node1)) ||
                        (node2_type != NODE_GPP && node2_type != NODE_DEVICE &&
                         stream2 >= MAX_INPUTS(node2)))
                return -EINVAL;

        /*
         *  Only the following types of connections are allowed:
         *      task/dais socket < == > task/dais socket
         *      task/dais socket < == > device
         *      task/dais socket < == > GPP
         *
         *  ie, no message nodes, and at least one task or dais
         *  socket node.
         */
        if (node1_type == NODE_MESSAGE || node2_type == NODE_MESSAGE ||
                        (node1_type != NODE_TASK &&
                         node1_type != NODE_DAISSOCKET &&
                         node2_type != NODE_TASK &&
                         node2_type != NODE_DAISSOCKET))
                return -EPERM;
        /*
         * Check stream mode. Default is STRMMODE_PROCCOPY.
         */
        if (pattrs && pattrs->strm_mode != STRMMODE_PROCCOPY)
                return -EPERM;  /* illegal stream mode */

        if (node1_type != NODE_GPP) {
                hnode_mgr = node1->node_mgr;
        } else {
                hnode_mgr = node2->node_mgr;
        }

        /* Enter critical section */
        mutex_lock(&hnode_mgr->node_mgr_lock);

        /* Nodes must be in the allocated state */
        if (node1_type != NODE_GPP &&
                        node_get_state(node1) != NODE_ALLOCATED) {
                status = -EBADR;
                goto out_unlock;
        }

        if (node2_type != NODE_GPP &&
                        node_get_state(node2) != NODE_ALLOCATED) {
                status = -EBADR;
                goto out_unlock;
        }

        /*
         *  Check that stream indices for task and dais socket nodes
         *  are not already be used. (Device nodes checked later)
         */
        if (node1_type == NODE_TASK || node1_type == NODE_DAISSOCKET) {
                output = &(node1->create_args.asa.
                                task_arg_obj.strm_out_def[stream1]);
                if (output->sz_device) {
                        status = -EISCONN;
                        goto out_unlock;
                }

        }
        if (node2_type == NODE_TASK || node2_type == NODE_DAISSOCKET) {
                input = &(node2->create_args.asa.
                                task_arg_obj.strm_in_def[stream2]);
                if (input->sz_device) {
                        status = -EISCONN;
                        goto out_unlock;
                }

        }
        /* Connecting two task nodes? */
        if ((node1_type == NODE_TASK || node1_type == NODE_DAISSOCKET) &&
                                (node2_type == NODE_TASK ||
                                 node2_type == NODE_DAISSOCKET)) {
                /* Find available pipe */
                pipe_id = find_first_zero_bit(hnode_mgr->pipe_map, MAXPIPES);
                if (pipe_id == MAXPIPES) {
                        status = -ECONNREFUSED;
                        goto out_unlock;
                }
                set_bit(pipe_id, hnode_mgr->pipe_map);
                node1->outputs[stream1].type = NODECONNECT;
                node2->inputs[stream2].type = NODECONNECT;
                node1->outputs[stream1].dev_id = pipe_id;
                node2->inputs[stream2].dev_id = pipe_id;
                output->sz_device = kzalloc(PIPENAMELEN + 1, GFP_KERNEL);
                input->sz_device = kzalloc(PIPENAMELEN + 1, GFP_KERNEL);
                if (!output->sz_device || !input->sz_device) {
                        /* Undo the connection */
                        kfree(output->sz_device);
                        kfree(input->sz_device);
                        clear_bit(pipe_id, hnode_mgr->pipe_map);
                        status = -ENOMEM;
                        goto out_unlock;
                }
                /* Copy "/dbpipe<pipId>" name to device names */
                sprintf(output->sz_device, "%s%d", PIPEPREFIX, pipe_id);
                strcpy(input->sz_device, output->sz_device);
        }
        /* Connecting task node to host? */
        if (node1_type == NODE_GPP || node2_type == NODE_GPP) {
                pstr_dev_name = kzalloc(HOSTNAMELEN + 1, GFP_KERNEL);
                if (!pstr_dev_name) {
                        status = -ENOMEM;
                        goto out_unlock;
                }

                chnl_mode = (node1_type == NODE_GPP) ?
                        CHNL_MODETODSP : CHNL_MODEFROMDSP;

                /*
                 *  Reserve a channel id. We need to put the name "/host<id>"
                 *  in the node's create_args, but the host
                 *  side channel will not be opened until DSPStream_Open is
                 *  called for this node.
                 */
                strm_mode = pattrs ? pattrs->strm_mode : STRMMODE_PROCCOPY;
                switch (strm_mode) {
                case STRMMODE_RDMA:
                        chnl_id = find_first_zero_bit(hnode_mgr->dma_chnl_map,
                                        CHNL_MAXCHANNELS);
                        if (chnl_id < CHNL_MAXCHANNELS) {
                                set_bit(chnl_id, hnode_mgr->dma_chnl_map);
                                /* dma chans are 2nd transport chnl set
                                 * ids(e.g. 16-31) */
                                chnl_id = chnl_id + hnode_mgr->num_chnls;
                        }
                        break;
                case STRMMODE_ZEROCOPY:
                        chnl_id = find_first_zero_bit(hnode_mgr->zc_chnl_map,
                                        CHNL_MAXCHANNELS);
                        if (chnl_id < CHNL_MAXCHANNELS) {
                                set_bit(chnl_id, hnode_mgr->zc_chnl_map);
                                /* zero-copy chans are 3nd transport set
                                 * (e.g. 32-47) */
                                chnl_id = chnl_id +
                                        (2 * hnode_mgr->num_chnls);
                        }

                        break;
                case STRMMODE_PROCCOPY:
                        chnl_id = find_first_zero_bit(hnode_mgr->chnl_map,
                                        CHNL_MAXCHANNELS);
                        if (chnl_id < CHNL_MAXCHANNELS)
                                set_bit(chnl_id, hnode_mgr->chnl_map);
                        break;
                default:
                        status = -EINVAL;
                        goto out_unlock;
                }
                if (chnl_id == CHNL_MAXCHANNELS) {
                        status = -ECONNREFUSED;
                        goto out_unlock;
                }

                if (node1 == (struct node_object *)DSP_HGPPNODE) {
                        node2->inputs[stream2].type = HOSTCONNECT;
                        node2->inputs[stream2].dev_id = chnl_id;
                        input->sz_device = pstr_dev_name;
                } else {
                        node1->outputs[stream1].type = HOSTCONNECT;
                        node1->outputs[stream1].dev_id = chnl_id;
                        output->sz_device = pstr_dev_name;
                }
                sprintf(pstr_dev_name, "%s%d", HOSTPREFIX, chnl_id);
        }
        /* Connecting task node to device node? */
        if ((node1_type == NODE_DEVICE) || (node2_type == NODE_DEVICE)) {
                if (node2_type == NODE_DEVICE) {
                        /* node1 == > device */
                        dev_node_obj = node2;
                        hnode = node1;
                        pstream = &(node1->outputs[stream1]);
                        pstrm_def = output;
                } else {
                        /* device == > node2 */
                        dev_node_obj = node1;
                        hnode = node2;
                        pstream = &(node2->inputs[stream2]);
                        pstrm_def = input;
                }
                /* Set up create args */
                pstream->type = DEVICECONNECT;
                dw_length = strlen(dev_node_obj->str_dev_name);
                if (conn_param)
                        pstrm_def->sz_device = kzalloc(dw_length + 1 +
                                        conn_param->cb_data,
                                        GFP_KERNEL);
                else
                        pstrm_def->sz_device = kzalloc(dw_length + 1,
                                        GFP_KERNEL);
                if (!pstrm_def->sz_device) {
                        status = -ENOMEM;
                        goto out_unlock;
                }
                /* Copy device name */
                strncpy(pstrm_def->sz_device,
                                dev_node_obj->str_dev_name, dw_length);
                if (conn_param)
                        strncat(pstrm_def->sz_device,
                                        (char *)conn_param->node_data,
                                        (u32) conn_param->cb_data);
                dev_node_obj->device_owner = hnode;
        }
        /* Fill in create args */
        if (node1_type == NODE_TASK || node1_type == NODE_DAISSOCKET) {
                node1->create_args.asa.task_arg_obj.num_outputs++;
                fill_stream_def(node1, output, pattrs);
        }
        if (node2_type == NODE_TASK || node2_type == NODE_DAISSOCKET) {
                node2->create_args.asa.task_arg_obj.num_inputs++;
                fill_stream_def(node2, input, pattrs);
        }
        /* Update node1 and node2 stream_connect */
        if (node1_type != NODE_GPP && node1_type != NODE_DEVICE) {
                node1->num_outputs++;
                if (stream1 > node1->max_output_index)
                        node1->max_output_index = stream1;

        }
        if (node2_type != NODE_GPP && node2_type != NODE_DEVICE) {
                node2->num_inputs++;
                if (stream2 > node2->max_input_index)
                        node2->max_input_index = stream2;

        }
        fill_stream_connect(node1, node2, stream1, stream2);
        /* end of sync_enter_cs */
        /* Exit critical section */
out_unlock:
        if (status && pstr_dev_name)
                kfree(pstr_dev_name);
        mutex_unlock(&hnode_mgr->node_mgr_lock);
        dev_dbg(bridge, "%s: node1: %p stream1: %d node2: %p stream2: %d"
                        "pattrs: %p status: 0x%x\n", __func__, node1,
                        stream1, node2, stream2, pattrs, status);
        return status;
}

/*
 *  ======== node_create ========
 *  Purpose:
 *      Create a node on the DSP by remotely calling the node's create function.
 */
int node_create(struct node_object *hnode)
{
        struct node_object *pnode = (struct node_object *)hnode;
        struct node_mgr *hnode_mgr;
        struct bridge_drv_interface *intf_fxns;
        u32 ul_create_fxn;
        enum node_type node_type;
        int status = 0;
        int status1 = 0;
        struct dsp_cbdata cb_data;
        u32 proc_id = 255;
        struct dsp_processorstate proc_state;
        struct proc_object *hprocessor;
#if defined(CONFIG_TIDSPBRIDGE_DVFS) && !defined(CONFIG_CPU_FREQ)
        struct dspbridge_platform_data *pdata =
            omap_dspbridge_dev->dev.platform_data;
#endif

        if (!pnode) {
                status = -EFAULT;
                goto func_end;
        }
        hprocessor = hnode->processor;
        status = proc_get_state(hprocessor, &proc_state,
                                sizeof(struct dsp_processorstate));
        if (status)
                goto func_end;
        /* If processor is in error state then don't attempt to create
           new node */
        if (proc_state.proc_state == PROC_ERROR) {
                status = -EPERM;
                goto func_end;
        }
        /* create struct dsp_cbdata struct for PWR calls */
        cb_data.cb_data = PWR_TIMEOUT;
        node_type = node_get_type(hnode);
        hnode_mgr = hnode->node_mgr;
        intf_fxns = hnode_mgr->intf_fxns;
        /* Get access to node dispatcher */
        mutex_lock(&hnode_mgr->node_mgr_lock);

        /* Check node state */
        if (node_get_state(hnode) != NODE_ALLOCATED)
                status = -EBADR;

        if (!status)
                status = proc_get_processor_id(pnode->processor, &proc_id);

        if (status)
                goto func_cont2;

        if (proc_id != DSP_UNIT)
                goto func_cont2;

        /* Make sure streams are properly connected */
        if ((hnode->num_inputs && hnode->max_input_index >
             hnode->num_inputs - 1) ||
            (hnode->num_outputs && hnode->max_output_index >
             hnode->num_outputs - 1))
                status = -ENOTCONN;

        if (!status) {
                /* If node's create function is not loaded, load it */
                /* Boost the OPP level to max level that DSP can be requested */
#if defined(CONFIG_TIDSPBRIDGE_DVFS) && !defined(CONFIG_CPU_FREQ)
                if (pdata->cpu_set_freq)
                        (*pdata->cpu_set_freq) (pdata->mpu_speed[VDD1_OPP3]);
#endif
                status = hnode_mgr->nldr_fxns.load(hnode->nldr_node_obj,
                                                       NLDR_CREATE);
                /* Get address of node's create function */
                if (!status) {
                        hnode->loaded = true;
                        if (node_type != NODE_DEVICE) {
                                status = get_fxn_address(hnode, &ul_create_fxn,
                                                         CREATEPHASE);
                        }
                } else {
                        pr_err("%s: failed to load create code: 0x%x\n",
                               __func__, status);
                }
                /* Request the lowest OPP level */
#if defined(CONFIG_TIDSPBRIDGE_DVFS) && !defined(CONFIG_CPU_FREQ)
                if (pdata->cpu_set_freq)
                        (*pdata->cpu_set_freq) (pdata->mpu_speed[VDD1_OPP1]);
#endif
                /* Get address of iAlg functions, if socket node */
                if (!status) {
                        if (node_type == NODE_DAISSOCKET) {
                                status = hnode_mgr->nldr_fxns.get_fxn_addr
                                    (hnode->nldr_node_obj,
                                     hnode->dcd_props.obj_data.node_obj.
                                     str_i_alg_name,
                                     &hnode->create_args.asa.
                                     task_arg_obj.dais_arg);
                        }
                }
        }
        if (!status) {
                if (node_type != NODE_DEVICE) {
                        status = disp_node_create(hnode_mgr->disp_obj, hnode,
                                                  hnode_mgr->fxn_addrs
                                                  [RMSCREATENODE],
                                                  ul_create_fxn,
                                                  &(hnode->create_args),
                                                  &(hnode->node_env));
                        if (status >= 0) {
                                /* Set the message queue id to the node env
                                 * pointer */
                                intf_fxns = hnode_mgr->intf_fxns;
                                (*intf_fxns->msg_set_queue_id) (hnode->
                                                        msg_queue_obj,
                                                        hnode->node_env);
                        }
                }
        }
        /*  Phase II/Overlays: Create, execute, delete phases  possibly in
         *  different files/sections. */
        if (hnode->loaded && hnode->phase_split) {
                /* If create code was dynamically loaded, we can now unload
                 * it. */
                status1 = hnode_mgr->nldr_fxns.unload(hnode->nldr_node_obj,
                                                          NLDR_CREATE);
                hnode->loaded = false;
        }
        if (status1)
                pr_err("%s: Failed to unload create code: 0x%x\n",
                       __func__, status1);
func_cont2:
        /* Update node state and node manager state */
        if (status >= 0) {
                NODE_SET_STATE(hnode, NODE_CREATED);
                hnode_mgr->num_created++;
                goto func_cont;
        }
        if (status != -EBADR) {
                /* Put back in NODE_ALLOCATED state if error occurred */
                NODE_SET_STATE(hnode, NODE_ALLOCATED);
        }
func_cont:
        /* Free access to node dispatcher */
        mutex_unlock(&hnode_mgr->node_mgr_lock);
func_end:
        if (status >= 0) {
                proc_notify_clients(hnode->processor, DSP_NODESTATECHANGE);
                ntfy_notify(hnode->ntfy_obj, DSP_NODESTATECHANGE);
        }

        dev_dbg(bridge, "%s: hnode: %p status: 0x%x\n", __func__,
                hnode, status);
        return status;
}

/*
 *  ======== node_create_mgr ========
 *  Purpose:
 *      Create a NODE Manager object.
 */
int node_create_mgr(struct node_mgr **node_man,
                           struct dev_object *hdev_obj)
{
        u32 i;
        struct node_mgr *node_mgr_obj = NULL;
        struct disp_attr disp_attr_obj;
        char *sz_zl_file = "";
        struct nldr_attrs nldr_attrs_obj;
        int status = 0;
        u8 dev_type;

        *node_man = NULL;
        /* Allocate Node manager object */
        node_mgr_obj = kzalloc(sizeof(struct node_mgr), GFP_KERNEL);
        if (!node_mgr_obj)
                return -ENOMEM;

        node_mgr_obj->dev_obj = hdev_obj;

        node_mgr_obj->ntfy_obj = kmalloc(sizeof(struct ntfy_object),
                        GFP_KERNEL);
        if (!node_mgr_obj->ntfy_obj) {
                status = -ENOMEM;
                goto out_err;
        }
        ntfy_init(node_mgr_obj->ntfy_obj);

        INIT_LIST_HEAD(&node_mgr_obj->node_list);

        dev_get_dev_type(hdev_obj, &dev_type);

        status = dcd_create_manager(sz_zl_file, &node_mgr_obj->dcd_mgr);
        if (status)
                goto out_err;

        status = get_proc_props(node_mgr_obj, hdev_obj);
        if (status)
                goto out_err;

        /* Create NODE Dispatcher */
        disp_attr_obj.chnl_offset = node_mgr_obj->chnl_offset;
        disp_attr_obj.chnl_buf_size = node_mgr_obj->chnl_buf_size;
        disp_attr_obj.proc_family = node_mgr_obj->proc_family;
        disp_attr_obj.proc_type = node_mgr_obj->proc_type;

        status = disp_create(&node_mgr_obj->disp_obj, hdev_obj, &disp_attr_obj);
        if (status)
                goto out_err;

        /* Create a STRM Manager */
        status = strm_create(&node_mgr_obj->strm_mgr_obj, hdev_obj);
        if (status)
                goto out_err;

        dev_get_intf_fxns(hdev_obj, &node_mgr_obj->intf_fxns);
        /* Get msg_ctrl queue manager */
        dev_get_msg_mgr(hdev_obj, &node_mgr_obj->msg_mgr_obj);
        mutex_init(&node_mgr_obj->node_mgr_lock);

        /* Block out reserved channels */
        for (i = 0; i < node_mgr_obj->chnl_offset; i++)
                set_bit(i, node_mgr_obj->chnl_map);

        /* Block out channels reserved for RMS */
        set_bit(node_mgr_obj->chnl_offset, node_mgr_obj->chnl_map);
        set_bit(node_mgr_obj->chnl_offset + 1, node_mgr_obj->chnl_map);

        /* NO RM Server on the IVA */
        if (dev_type != IVA_UNIT) {
                /* Get addresses of any RMS functions loaded */
                status = get_rms_fxns(node_mgr_obj);
                if (status)
                        goto out_err;
        }

        /* Get loader functions and create loader */
        node_mgr_obj->nldr_fxns = nldr_fxns;    /* Dyn loader funcs */

        nldr_attrs_obj.ovly = ovly;
        nldr_attrs_obj.write = mem_write;
        nldr_attrs_obj.dsp_word_size = node_mgr_obj->dsp_word_size;
        nldr_attrs_obj.dsp_mau_size = node_mgr_obj->dsp_mau_size;
        status = node_mgr_obj->nldr_fxns.create(&node_mgr_obj->nldr_obj,
                        hdev_obj,
                        &nldr_attrs_obj);
        if (status)
                goto out_err;

        *node_man = node_mgr_obj;

        return status;
out_err:
        delete_node_mgr(node_mgr_obj);
        return status;
}

/*
 *  ======== node_delete ========
 *  Purpose:
 *      Delete a node on the DSP by remotely calling the node's delete function.
 *      Loads the node's delete function if necessary. Free GPP side resources
 *      after node's delete function returns.
 */
int node_delete(struct node_res_object *noderes,
                       struct process_context *pr_ctxt)
{
        struct node_object *pnode = noderes->node;
        struct node_mgr *hnode_mgr;
        struct proc_object *hprocessor;
        struct disp_object *disp_obj;
        u32 ul_delete_fxn;
        enum node_type node_type;
        enum node_state state;
        int status = 0;
        int status1 = 0;
        struct dsp_cbdata cb_data;
        u32 proc_id;
        struct bridge_drv_interface *intf_fxns;

        void *node_res = noderes;

        struct dsp_processorstate proc_state;

        if (!pnode) {
                status = -EFAULT;
                goto func_end;
        }
        /* create struct dsp_cbdata struct for PWR call */
        cb_data.cb_data = PWR_TIMEOUT;
        hnode_mgr = pnode->node_mgr;
        hprocessor = pnode->processor;
        disp_obj = hnode_mgr->disp_obj;
        node_type = node_get_type(pnode);
        intf_fxns = hnode_mgr->intf_fxns;
        /* Enter critical section */
        mutex_lock(&hnode_mgr->node_mgr_lock);

        state = node_get_state(pnode);
        /*  Execute delete phase code for non-device node in all cases
         *  except when the node was only allocated. Delete phase must be
         *  executed even if create phase was executed, but failed.
         *  If the node environment pointer is non-NULL, the delete phase
         *  code must be  executed. */
        if (!(state == NODE_ALLOCATED && pnode->node_env == (u32) NULL) &&
            node_type != NODE_DEVICE) {
                status = proc_get_processor_id(pnode->processor, &proc_id);
                if (status)
                        goto func_cont1;

                if (proc_id == DSP_UNIT || proc_id == IVA_UNIT) {
                        /*  If node has terminated, execute phase code will
                         *  have already been unloaded in node_on_exit(). If the
                         *  node is PAUSED, the execute phase is loaded, and it
                         *  is now ok to unload it. If the node is running, we
                         *  will unload the execute phase only after deleting
                         *  the node. */
                        if (state == NODE_PAUSED && pnode->loaded &&
                            pnode->phase_split) {
                                /* Ok to unload execute code as long as node
                                 * is not * running */
                                status1 =
                                    hnode_mgr->nldr_fxns.
                                    unload(pnode->nldr_node_obj,
                                               NLDR_EXECUTE);
                                pnode->loaded = false;
                                NODE_SET_STATE(pnode, NODE_DONE);
                        }
                        /* Load delete phase code if not loaded or if haven't
                         * * unloaded EXECUTE phase */
                        if ((!(pnode->loaded) || (state == NODE_RUNNING)) &&
                            pnode->phase_split) {
                                status =
                                    hnode_mgr->nldr_fxns.
                                    load(pnode->nldr_node_obj, NLDR_DELETE);
                                if (!status)
                                        pnode->loaded = true;
                                else
                                        pr_err("%s: fail - load delete code:"
                                               " 0x%x\n", __func__, status);
                        }
                }
func_cont1:
                if (!status) {
                        /* Unblock a thread trying to terminate the node */
                        (void)sync_set_event(pnode->sync_done);
                        if (proc_id == DSP_UNIT) {
                                /* ul_delete_fxn = address of node's delete
                                 * function */
                                status = get_fxn_address(pnode, &ul_delete_fxn,
                                                         DELETEPHASE);
                        } else if (proc_id == IVA_UNIT)
                                ul_delete_fxn = (u32) pnode->node_env;
                        if (!status) {
                                status = proc_get_state(hprocessor,
                                                &proc_state,
                                                sizeof(struct
                                                       dsp_processorstate));
                                if (proc_state.proc_state != PROC_ERROR) {
                                        status =
                                            disp_node_delete(disp_obj, pnode,
                                                             hnode_mgr->
                                                             fxn_addrs
                                                             [RMSDELETENODE],
                                                             ul_delete_fxn,
                                                             pnode->node_env);
                                } else
                                        NODE_SET_STATE(pnode, NODE_DONE);

                                /* Unload execute, if not unloaded, and delete
                                 * function */
                                if (state == NODE_RUNNING &&
                                    pnode->phase_split) {
                                        status1 =
                                            hnode_mgr->nldr_fxns.
                                            unload(pnode->nldr_node_obj,
                                                       NLDR_EXECUTE);
                                }
                                if (status1)
                                        pr_err("%s: fail - unload execute code:"
                                               " 0x%x\n", __func__, status1);

                                status1 =
                                    hnode_mgr->nldr_fxns.unload(pnode->
                                                            nldr_node_obj,
                                                            NLDR_DELETE);
                                pnode->loaded = false;
                                if (status1)
                                        pr_err("%s: fail - unload delete code: "
                                               "0x%x\n", __func__, status1);
                        }
                }
        }
        /* Free host side resources even if a failure occurred */
        /* Remove node from hnode_mgr->node_list */
        list_del(&pnode->list_elem);
        hnode_mgr->num_nodes--;
        /* Decrement count of nodes created on DSP */
        if ((state != NODE_ALLOCATED) || ((state == NODE_ALLOCATED) &&
                                          (pnode->node_env != (u32) NULL)))
                hnode_mgr->num_created--;
        /*  Free host-side resources allocated by node_create()
         *  delete_node() fails if SM buffers not freed by client! */
        drv_proc_node_update_status(node_res, false);
        delete_node(pnode, pr_ctxt);

        /*
         * Release all Node resources and its context
         */
        idr_remove(pr_ctxt->node_id, ((struct node_res_object *)node_res)->id);
        kfree(node_res);

        /* Exit critical section */
        mutex_unlock(&hnode_mgr->node_mgr_lock);
        proc_notify_clients(hprocessor, DSP_NODESTATECHANGE);
func_end:
        dev_dbg(bridge, "%s: pnode: %p status 0x%x\n", __func__, pnode, status);
        return status;
}

/*
 *  ======== node_delete_mgr ========
 *  Purpose:
 *      Delete the NODE Manager.
 */
int node_delete_mgr(struct node_mgr *hnode_mgr)
{
        if (!hnode_mgr)
                return -EFAULT;

        delete_node_mgr(hnode_mgr);

        return 0;
}

/*
 *  ======== node_enum_nodes ========
 *  Purpose:
 *      Enumerate currently allocated nodes.
 */
int node_enum_nodes(struct node_mgr *hnode_mgr, void **node_tab,
                           u32 node_tab_size, u32 *pu_num_nodes,
                           u32 *pu_allocated)
{
        struct node_object *hnode;
        u32 i = 0;
        int status = 0;

        if (!hnode_mgr) {
                status = -EFAULT;
                goto func_end;
        }
        /* Enter critical section */
        mutex_lock(&hnode_mgr->node_mgr_lock);

        if (hnode_mgr->num_nodes > node_tab_size) {
                *pu_allocated = hnode_mgr->num_nodes;
                *pu_num_nodes = 0;
                status = -EINVAL;
        } else {
                list_for_each_entry(hnode, &hnode_mgr->node_list, list_elem)
                        node_tab[i++] = hnode;
                *pu_allocated = *pu_num_nodes = hnode_mgr->num_nodes;
        }
        /* end of sync_enter_cs */
        /* Exit critical section */
        mutex_unlock(&hnode_mgr->node_mgr_lock);
func_end:
        return status;
}

/*
 *  ======== node_free_msg_buf ========
 *  Purpose:
 *      Frees the message buffer.
 */
int node_free_msg_buf(struct node_object *hnode, u8 * pbuffer,
                             struct dsp_bufferattr *pattr)
{
        struct node_object *pnode = (struct node_object *)hnode;
        int status = 0;
        u32 proc_id;

        if (!hnode) {
                status = -EFAULT;
                goto func_end;
        }
        status = proc_get_processor_id(pnode->processor, &proc_id);
        if (proc_id == DSP_UNIT) {
                if (!status) {
                        if (pattr == NULL) {
                                /* set defaults */
                                pattr = &node_dfltbufattrs;
                        }
                        /* Node supports single SM segment only */
                        if (pattr->segment_id != 1)
                                status = -EBADR;

                        /* pbuffer is clients Va. */
                        status = cmm_xlator_free_buf(pnode->xlator, pbuffer);
                }
        } else {
        }
func_end:
        return status;
}

/*
 *  ======== node_get_attr ========
 *  Purpose:
 *      Copy the current attributes of the specified node into a dsp_nodeattr
 *      structure.
 */
int node_get_attr(struct node_object *hnode,
                         struct dsp_nodeattr *pattr, u32 attr_size)
{
        struct node_mgr *hnode_mgr;

        if (!hnode)
                return -EFAULT;

        hnode_mgr = hnode->node_mgr;
        /* Enter hnode_mgr critical section since we're accessing
         * data that could be changed by node_change_priority() and
         * node_connect(). */
        mutex_lock(&hnode_mgr->node_mgr_lock);
        pattr->cb_struct = sizeof(struct dsp_nodeattr);
        /* dsp_nodeattrin */
        pattr->in_node_attr_in.cb_struct =
                sizeof(struct dsp_nodeattrin);
        pattr->in_node_attr_in.prio = hnode->prio;
        pattr->in_node_attr_in.timeout = hnode->timeout;
        pattr->in_node_attr_in.heap_size =
                hnode->create_args.asa.task_arg_obj.heap_size;
        pattr->in_node_attr_in.pgpp_virt_addr = (void *)
                hnode->create_args.asa.task_arg_obj.gpp_heap_addr;
        pattr->node_attr_inputs = hnode->num_gpp_inputs;
        pattr->node_attr_outputs = hnode->num_gpp_outputs;
        /* dsp_nodeinfo */
        get_node_info(hnode, &(pattr->node_info));
        /* end of sync_enter_cs */
        /* Exit critical section */
        mutex_unlock(&hnode_mgr->node_mgr_lock);

        return 0;
}

/*
 *  ======== node_get_channel_id ========
 *  Purpose:
 *      Get the channel index reserved for a stream connection between the
 *      host and a node.
 */
int node_get_channel_id(struct node_object *hnode, u32 dir, u32 index,
                               u32 *chan_id)
{
        enum node_type node_type;
        int status = -EINVAL;

        if (!hnode) {
                status = -EFAULT;
                return status;
        }
        node_type = node_get_type(hnode);
        if (node_type != NODE_TASK && node_type != NODE_DAISSOCKET) {
                status = -EPERM;
                return status;
        }
        if (dir == DSP_TONODE) {
                if (index < MAX_INPUTS(hnode)) {
                        if (hnode->inputs[index].type == HOSTCONNECT) {
                                *chan_id = hnode->inputs[index].dev_id;
                                status = 0;
                        }
                }
        } else {
                if (index < MAX_OUTPUTS(hnode)) {
                        if (hnode->outputs[index].type == HOSTCONNECT) {
                                *chan_id = hnode->outputs[index].dev_id;
                                status = 0;
                        }
                }
        }
        return status;
}

/*
 *  ======== node_get_message ========
 *  Purpose:
 *      Retrieve a message from a node on the DSP.
 */
int node_get_message(struct node_object *hnode,
                            struct dsp_msg *message, u32 utimeout)
{
        struct node_mgr *hnode_mgr;
        enum node_type node_type;
        struct bridge_drv_interface *intf_fxns;
        int status = 0;
        void *tmp_buf;
        struct dsp_processorstate proc_state;
        struct proc_object *hprocessor;

        if (!hnode) {
                status = -EFAULT;
                goto func_end;
        }
        hprocessor = hnode->processor;
        status = proc_get_state(hprocessor, &proc_state,
                                sizeof(struct dsp_processorstate));
        if (status)
                goto func_end;
        /* If processor is in error state then don't attempt to get the
           message */
        if (proc_state.proc_state == PROC_ERROR) {
                status = -EPERM;
                goto func_end;
        }
        hnode_mgr = hnode->node_mgr;
        node_type = node_get_type(hnode);
        if (node_type != NODE_MESSAGE && node_type != NODE_TASK &&
            node_type != NODE_DAISSOCKET) {
                status = -EPERM;
                goto func_end;
        }
        /*  This function will block unless a message is available. Since
         *  DSPNode_RegisterNotify() allows notification when a message
         *  is available, the system can be designed so that
         *  DSPNode_GetMessage() is only called when a message is
         *  available. */
        intf_fxns = hnode_mgr->intf_fxns;
        status =
            (*intf_fxns->msg_get) (hnode->msg_queue_obj, message, utimeout);
        /* Check if message contains SM descriptor */
        if (status || !(message->cmd & DSP_RMSBUFDESC))
                goto func_end;

        /* Translate DSP byte addr to GPP Va. */
        tmp_buf = cmm_xlator_translate(hnode->xlator,
                                       (void *)(message->arg1 *
                                                hnode->node_mgr->
                                                dsp_word_size), CMM_DSPPA2PA);
        if (tmp_buf != NULL) {
                /* now convert this GPP Pa to Va */
                tmp_buf = cmm_xlator_translate(hnode->xlator, tmp_buf,
                                               CMM_PA2VA);
                if (tmp_buf != NULL) {
                        /* Adjust SM size in msg */
                        message->arg1 = (u32) tmp_buf;
                        message->arg2 *= hnode->node_mgr->dsp_word_size;
                } else {
                        status = -ESRCH;
                }
        } else {
                status = -ESRCH;
        }
func_end:
        dev_dbg(bridge, "%s: hnode: %p message: %p utimeout: 0x%x\n", __func__,
                hnode, message, utimeout);
        return status;
}

/*
 *   ======== node_get_nldr_obj ========
 */
int node_get_nldr_obj(struct node_mgr *hnode_mgr,
                             struct nldr_object **nldr_ovlyobj)
{
        int status = 0;
        struct node_mgr *node_mgr_obj = hnode_mgr;

        if (!hnode_mgr)
                status = -EFAULT;
        else
                *nldr_ovlyobj = node_mgr_obj->nldr_obj;

        return status;
}

/*
 *  ======== node_get_strm_mgr ========
 *  Purpose:
 *      Returns the Stream manager.
 */
int node_get_strm_mgr(struct node_object *hnode,
                             struct strm_mgr **strm_man)
{
        int status = 0;

        if (!hnode)
                status = -EFAULT;
        else
                *strm_man = hnode->node_mgr->strm_mgr_obj;

        return status;
}

/*
 *  ======== node_get_load_type ========
 */
enum nldr_loadtype node_get_load_type(struct node_object *hnode)
{
        if (!hnode) {
                dev_dbg(bridge, "%s: Failed. hnode: %p\n", __func__, hnode);
                return -1;
        } else {
                return hnode->dcd_props.obj_data.node_obj.load_type;
        }
}

/*
 *  ======== node_get_timeout ========
 *  Purpose:
 *      Returns the timeout value for this node.
 */
u32 node_get_timeout(struct node_object *hnode)
{
        if (!hnode) {
                dev_dbg(bridge, "%s: failed. hnode: %p\n", __func__, hnode);
                return 0;
        } else {
                return hnode->timeout;
        }
}

/*
 *  ======== node_get_type ========
 *  Purpose:
 *      Returns the node type.
 */
enum node_type node_get_type(struct node_object *hnode)
{
        enum node_type node_type;

        if (hnode == (struct node_object *)DSP_HGPPNODE)
                node_type = NODE_GPP;
        else {
                if (!hnode)
                        node_type = -1;
                else
                        node_type = hnode->ntype;
        }
        return node_type;
}

/*
 *  ======== node_on_exit ========
 *  Purpose:
 *      Gets called when RMS_EXIT is received for a node.
 */
void node_on_exit(struct node_object *hnode, s32 node_status)
{
        if (!hnode)
                return;

        /* Set node state to done */
        NODE_SET_STATE(hnode, NODE_DONE);
        hnode->exit_status = node_status;
        if (hnode->loaded && hnode->phase_split) {
                (void)hnode->node_mgr->nldr_fxns.unload(hnode->
                                                             nldr_node_obj,
                                                             NLDR_EXECUTE);
                hnode->loaded = false;
        }
        /* Unblock call to node_terminate */
        (void)sync_set_event(hnode->sync_done);
        /* Notify clients */
        proc_notify_clients(hnode->processor, DSP_NODESTATECHANGE);
        ntfy_notify(hnode->ntfy_obj, DSP_NODESTATECHANGE);
}

/*
 *  ======== node_pause ========
 *  Purpose:
 *      Suspend execution of a node currently running on the DSP.
 */
int node_pause(struct node_object *hnode)
{
        struct node_object *pnode = (struct node_object *)hnode;
        enum node_type node_type;
        enum node_state state;
        struct node_mgr *hnode_mgr;
        int status = 0;
        u32 proc_id;
        struct dsp_processorstate proc_state;
        struct proc_object *hprocessor;

        if (!hnode) {
                status = -EFAULT;
        } else {
                node_type = node_get_type(hnode);
                if (node_type != NODE_TASK && node_type != NODE_DAISSOCKET)
                        status = -EPERM;
        }
        if (status)
                goto func_end;

        status = proc_get_processor_id(pnode->processor, &proc_id);

        if (proc_id == IVA_UNIT)
                status = -ENOSYS;

        if (!status) {
                hnode_mgr = hnode->node_mgr;

                /* Enter critical section */
                mutex_lock(&hnode_mgr->node_mgr_lock);
                state = node_get_state(hnode);
                /* Check node state */
                if (state != NODE_RUNNING)
                        status = -EBADR;

                if (status)
                        goto func_cont;
                hprocessor = hnode->processor;
                status = proc_get_state(hprocessor, &proc_state,
                                sizeof(struct dsp_processorstate));
                if (status)
                        goto func_cont;
                /* If processor is in error state then don't attempt
                   to send the message */
                if (proc_state.proc_state == PROC_ERROR) {
                        status = -EPERM;
                        goto func_cont;
                }

                status = disp_node_change_priority(hnode_mgr->disp_obj, hnode,
                        hnode_mgr->fxn_addrs[RMSCHANGENODEPRIORITY],
                        hnode->node_env, NODE_SUSPENDEDPRI);

                /* Update state */
                if (status >= 0)
                        NODE_SET_STATE(hnode, NODE_PAUSED);

func_cont:
                /* End of sync_enter_cs */
                /* Leave critical section */
                mutex_unlock(&hnode_mgr->node_mgr_lock);
                if (status >= 0) {
                        proc_notify_clients(hnode->processor,
                                            DSP_NODESTATECHANGE);
                        ntfy_notify(hnode->ntfy_obj, DSP_NODESTATECHANGE);
                }
        }
func_end:
        dev_dbg(bridge, "%s: hnode: %p status 0x%x\n", __func__, hnode, status);
        return status;
}

/*
 *  ======== node_put_message ========
 *  Purpose:
 *      Send a message to a message node, task node, or XDAIS socket node. This
 *      function will block until the message stream can accommodate the
 *      message, or a timeout occurs.
 */
int node_put_message(struct node_object *hnode,
                            const struct dsp_msg *pmsg, u32 utimeout)
{
        struct node_mgr *hnode_mgr = NULL;
        enum node_type node_type;
        struct bridge_drv_interface *intf_fxns;
        enum node_state state;
        int status = 0;
        void *tmp_buf;
        struct dsp_msg new_msg;
        struct dsp_processorstate proc_state;
        struct proc_object *hprocessor;

        if (!hnode) {
                status = -EFAULT;
                goto func_end;
        }
        hprocessor = hnode->processor;
        status = proc_get_state(hprocessor, &proc_state,
                                sizeof(struct dsp_processorstate));
        if (status)
                goto func_end;
        /* If processor is in bad state then don't attempt sending the
           message */
        if (proc_state.proc_state == PROC_ERROR) {
                status = -EPERM;
                goto func_end;
        }
        hnode_mgr = hnode->node_mgr;
        node_type = node_get_type(hnode);
        if (node_type != NODE_MESSAGE && node_type != NODE_TASK &&
            node_type != NODE_DAISSOCKET)
                status = -EPERM;

        if (!status) {
                /*  Check node state. Can't send messages to a node after
                 *  we've sent the RMS_EXIT command. There is still the
                 *  possibility that node_terminate can be called after we've
                 *  checked the state. Could add another SYNC object to
                 *  prevent this (can't use node_mgr_lock, since we don't
                 *  want to block other NODE functions). However, the node may
                 *  still exit on its own, before this message is sent. */
                mutex_lock(&hnode_mgr->node_mgr_lock);

                state = node_get_state(hnode);
                if (state == NODE_TERMINATING || state == NODE_DONE)
                        status = -EBADR;

                /* end of sync_enter_cs */
                mutex_unlock(&hnode_mgr->node_mgr_lock);
        }
        if (status)
                goto func_end;

        /* assign pmsg values to new msg */
        new_msg = *pmsg;
        /* Now, check if message contains a SM buffer descriptor */
        if (pmsg->cmd & DSP_RMSBUFDESC) {
                /* Translate GPP Va to DSP physical buf Ptr. */
                tmp_buf = cmm_xlator_translate(hnode->xlator,
                                               (void *)new_msg.arg1,
                                               CMM_VA2DSPPA);
                if (tmp_buf != NULL) {
                        /* got translation, convert to MAUs in msg */
                        if (hnode->node_mgr->dsp_word_size != 0) {
                                new_msg.arg1 =
                                    (u32) tmp_buf /
                                    hnode->node_mgr->dsp_word_size;
                                /* MAUs */
                                new_msg.arg2 /= hnode->node_mgr->
                                    dsp_word_size;
                        } else {
                                pr_err("%s: dsp_word_size is zero!\n",
                                       __func__);
                                status = -EPERM;        /* bad DSPWordSize */
                        }
                } else {        /* failed to translate buffer address */
                        status = -ESRCH;
                }
        }
        if (!status) {
                intf_fxns = hnode_mgr->intf_fxns;
                status = (*intf_fxns->msg_put) (hnode->msg_queue_obj,
                                                    &new_msg, utimeout);
        }
func_end:
        dev_dbg(bridge, "%s: hnode: %p pmsg: %p utimeout: 0x%x, "
                "status 0x%x\n", __func__, hnode, pmsg, utimeout, status);
        return status;
}

/*
 *  ======== node_register_notify ========
 *  Purpose:
 *      Register to be notified on specific events for this node.
 */
int node_register_notify(struct node_object *hnode, u32 event_mask,
                                u32 notify_type,
                                struct dsp_notification *hnotification)
{
        struct bridge_drv_interface *intf_fxns;
        int status = 0;

        if (!hnode) {
                status = -EFAULT;
        } else {
                /* Check if event mask is a valid node related event */
                if (event_mask & ~(DSP_NODESTATECHANGE | DSP_NODEMESSAGEREADY))
                        status = -EINVAL;

                /* Check if notify type is valid */
                if (notify_type != DSP_SIGNALEVENT)
                        status = -EINVAL;

                /* Only one Notification can be registered at a
                 * time - Limitation */
                if (event_mask == (DSP_NODESTATECHANGE | DSP_NODEMESSAGEREADY))
                        status = -EINVAL;
        }
        if (!status) {
                if (event_mask == DSP_NODESTATECHANGE) {
                        status = ntfy_register(hnode->ntfy_obj, hnotification,
                                               event_mask & DSP_NODESTATECHANGE,
                                               notify_type);
                } else {
                        /* Send Message part of event mask to msg_ctrl */
                        intf_fxns = hnode->node_mgr->intf_fxns;
                        status = (*intf_fxns->msg_register_notify)
                            (hnode->msg_queue_obj,
                             event_mask & DSP_NODEMESSAGEREADY, notify_type,
                             hnotification);
                }

        }
        dev_dbg(bridge, "%s: hnode: %p event_mask: 0x%x notify_type: 0x%x "
                "hnotification: %p status 0x%x\n", __func__, hnode,
                event_mask, notify_type, hnotification, status);
        return status;
}

/*
 *  ======== node_run ========
 *  Purpose:
 *      Start execution of a node's execute phase, or resume execution of a node
 *      that has been suspended (via NODE_NodePause()) on the DSP. Load the
 *      node's execute function if necessary.
 */
int node_run(struct node_object *hnode)
{
        struct node_object *pnode = (struct node_object *)hnode;
        struct node_mgr *hnode_mgr;
        enum node_type node_type;
        enum node_state state;
        u32 ul_execute_fxn;
        u32 ul_fxn_addr;
        int status = 0;
        u32 proc_id;
        struct bridge_drv_interface *intf_fxns;
        struct dsp_processorstate proc_state;
        struct proc_object *hprocessor;

        if (!hnode) {
                status = -EFAULT;
                goto func_end;
        }
        hprocessor = hnode->processor;
        status = proc_get_state(hprocessor, &proc_state,
                                sizeof(struct dsp_processorstate));
        if (status)
                goto func_end;
        /* If processor is in error state then don't attempt to run the node */
        if (proc_state.proc_state == PROC_ERROR) {
                status = -EPERM;
                goto func_end;
        }
        node_type = node_get_type(hnode);
        if (node_type == NODE_DEVICE)
                status = -EPERM;
        if (status)
                goto func_end;

        hnode_mgr = hnode->node_mgr;
        if (!hnode_mgr) {
                status = -EFAULT;
                goto func_end;
        }
        intf_fxns = hnode_mgr->intf_fxns;
        /* Enter critical section */
        mutex_lock(&hnode_mgr->node_mgr_lock);

        state = node_get_state(hnode);
        if (state != NODE_CREATED && state != NODE_PAUSED)
                status = -EBADR;

        if (!status)
                status = proc_get_processor_id(pnode->processor, &proc_id);

        if (status)
                goto func_cont1;

        if ((proc_id != DSP_UNIT) && (proc_id != IVA_UNIT))
                goto func_cont1;

        if (state == NODE_CREATED) {
                /* If node's execute function is not loaded, load it */
                if (!(hnode->loaded) && hnode->phase_split) {
                        status =
                            hnode_mgr->nldr_fxns.load(hnode->nldr_node_obj,
                                                          NLDR_EXECUTE);
                        if (!status) {
                                hnode->loaded = true;
                        } else {
                                pr_err("%s: fail - load execute code: 0x%x\n",
                                       __func__, status);
                        }
                }
                if (!status) {
                        /* Get address of node's execute function */
                        if (proc_id == IVA_UNIT)
                                ul_execute_fxn = (u32) hnode->node_env;
                        else {
                                status = get_fxn_address(hnode, &ul_execute_fxn,
                                                         EXECUTEPHASE);
                        }
                }
                if (!status) {
                        ul_fxn_addr = hnode_mgr->fxn_addrs[RMSEXECUTENODE];
                        status =
                            disp_node_run(hnode_mgr->disp_obj, hnode,
                                          ul_fxn_addr, ul_execute_fxn,
                                          hnode->node_env);
                }
        } else if (state == NODE_PAUSED) {
                ul_fxn_addr = hnode_mgr->fxn_addrs[RMSCHANGENODEPRIORITY];
                status = disp_node_change_priority(hnode_mgr->disp_obj, hnode,
                                                   ul_fxn_addr, hnode->node_env,
                                                   NODE_GET_PRIORITY(hnode));
        } else {
                /* We should never get here */
        }
func_cont1:
        /* Update node state. */
        if (status >= 0)
                NODE_SET_STATE(hnode, NODE_RUNNING);
        else                    /* Set state back to previous value */
                NODE_SET_STATE(hnode, state);
        /*End of sync_enter_cs */
        /* Exit critical section */
        mutex_unlock(&hnode_mgr->node_mgr_lock);
        if (status >= 0) {
                proc_notify_clients(hnode->processor, DSP_NODESTATECHANGE);
                ntfy_notify(hnode->ntfy_obj, DSP_NODESTATECHANGE);
        }
func_end:
        dev_dbg(bridge, "%s: hnode: %p status 0x%x\n", __func__, hnode, status);
        return status;
}

/*
 *  ======== node_terminate ========
 *  Purpose:
 *      Signal a node running on the DSP that it should exit its execute phase
 *      function.
 */
int node_terminate(struct node_object *hnode, int *pstatus)
{
        struct node_object *pnode = (struct node_object *)hnode;
        struct node_mgr *hnode_mgr = NULL;
        enum node_type node_type;
        struct bridge_drv_interface *intf_fxns;
        enum node_state state;
        struct dsp_msg msg, killmsg;
        int status = 0;
        u32 proc_id, kill_time_out;
        struct deh_mgr *hdeh_mgr;
        struct dsp_processorstate proc_state;

        if (!hnode || !hnode->node_mgr) {
                status = -EFAULT;
                goto func_end;
        }
        if (pnode->processor == NULL) {
                status = -EFAULT;
                goto func_end;
        }
        status = proc_get_processor_id(pnode->processor, &proc_id);

        if (!status) {
                hnode_mgr = hnode->node_mgr;
                node_type = node_get_type(hnode);
                if (node_type != NODE_TASK && node_type != NODE_DAISSOCKET)
                        status = -EPERM;
        }
        if (!status) {
                /* Check node state */
                mutex_lock(&hnode_mgr->node_mgr_lock);
                state = node_get_state(hnode);
                if (state != NODE_RUNNING) {
                        status = -EBADR;
                        /* Set the exit status if node terminated on
                         * its own. */
                        if (state == NODE_DONE)
                                *pstatus = hnode->exit_status;

                } else {
                        NODE_SET_STATE(hnode, NODE_TERMINATING);
                }
                /* end of sync_enter_cs */
                mutex_unlock(&hnode_mgr->node_mgr_lock);
        }
        if (!status) {
                /*
                 *  Send exit message. Do not change state to NODE_DONE
                 *  here. That will be done in callback.
                 */
                status = proc_get_state(pnode->processor, &proc_state,
                                        sizeof(struct dsp_processorstate));
                if (status)
                        goto func_cont;
                /* If processor is in error state then don't attempt to send
                 * A kill task command */
                if (proc_state.proc_state == PROC_ERROR) {
                        status = -EPERM;
                        goto func_cont;
                }

                msg.cmd = RMS_EXIT;
                msg.arg1 = hnode->node_env;
                killmsg.cmd = RMS_KILLTASK;
                killmsg.arg1 = hnode->node_env;
                intf_fxns = hnode_mgr->intf_fxns;

                if (hnode->timeout > MAXTIMEOUT)
                        kill_time_out = MAXTIMEOUT;
                else
                        kill_time_out = (hnode->timeout) * 2;

                status = (*intf_fxns->msg_put) (hnode->msg_queue_obj, &msg,
                                                    hnode->timeout);
                if (status)
                        goto func_cont;

                /*
                 * Wait on synchronization object that will be
                 * posted in the callback on receiving RMS_EXIT
                 * message, or by node_delete. Check for valid hnode,
                 * in case posted by node_delete().
                 */
                status = sync_wait_on_event(hnode->sync_done,
                                            kill_time_out / 2);
                if (status != ETIME)
                        goto func_cont;

                status = (*intf_fxns->msg_put)(hnode->msg_queue_obj,
                                                &killmsg, hnode->timeout);
                if (status)
                        goto func_cont;
                status = sync_wait_on_event(hnode->sync_done,
                                             kill_time_out / 2);
                if (status) {
                        /*
                         * Here it goes the part of the simulation of
                         * the DSP exception.
                         */
                        dev_get_deh_mgr(hnode_mgr->dev_obj, &hdeh_mgr);
                        if (!hdeh_mgr)
                                goto func_cont;

                        bridge_deh_notify(hdeh_mgr, DSP_SYSERROR, DSP_EXCEPTIONABORT);
                }
        }
func_cont:
        if (!status) {
                /* Enter CS before getting exit status, in case node was
                 * deleted. */
                mutex_lock(&hnode_mgr->node_mgr_lock);
                /* Make sure node wasn't deleted while we blocked */
                if (!hnode) {
                        status = -EPERM;
                } else {
                        *pstatus = hnode->exit_status;
                        dev_dbg(bridge, "%s: hnode: %p env 0x%x status 0x%x\n",
                                __func__, hnode, hnode->node_env, status);
                }
                mutex_unlock(&hnode_mgr->node_mgr_lock);
        }                       /*End of sync_enter_cs */
func_end:
        return status;
}

/*
 *  ======== delete_node ========
 *  Purpose:
 *      Free GPP resources allocated in node_allocate() or node_connect().
 */
static void delete_node(struct node_object *hnode,
                        struct process_context *pr_ctxt)
{
        struct node_mgr *hnode_mgr;
        struct bridge_drv_interface *intf_fxns;
        u32 i;
        enum node_type node_type;
        struct stream_chnl stream;
        struct node_msgargs node_msg_args;
        struct node_taskargs task_arg_obj;
#ifdef DSP_DMM_DEBUG
        struct dmm_object *dmm_mgr;
        struct proc_object *p_proc_object =
            (struct proc_object *)hnode->processor;
#endif
        int status;
        if (!hnode)
                goto func_end;
        hnode_mgr = hnode->node_mgr;
        if (!hnode_mgr)
                goto func_end;

        node_type = node_get_type(hnode);
        if (node_type != NODE_DEVICE) {
                node_msg_args = hnode->create_args.asa.node_msg_args;
                kfree(node_msg_args.pdata);

                /* Free msg_ctrl queue */
                if (hnode->msg_queue_obj) {
                        intf_fxns = hnode_mgr->intf_fxns;
                        (*intf_fxns->msg_delete_queue) (hnode->
                                                            msg_queue_obj);
                        hnode->msg_queue_obj = NULL;
                }

                kfree(hnode->sync_done);

                /* Free all stream info */
                if (hnode->inputs) {
                        for (i = 0; i < MAX_INPUTS(hnode); i++) {
                                stream = hnode->inputs[i];
                                free_stream(hnode_mgr, stream);
                        }
                        kfree(hnode->inputs);
                        hnode->inputs = NULL;
                }
                if (hnode->outputs) {
                        for (i = 0; i < MAX_OUTPUTS(hnode); i++) {
                                stream = hnode->outputs[i];
                                free_stream(hnode_mgr, stream);
                        }
                        kfree(hnode->outputs);
                        hnode->outputs = NULL;
                }
                task_arg_obj = hnode->create_args.asa.task_arg_obj;
                if (task_arg_obj.strm_in_def) {
                        for (i = 0; i < MAX_INPUTS(hnode); i++) {
                                kfree(task_arg_obj.strm_in_def[i].sz_device);
                                task_arg_obj.strm_in_def[i].sz_device = NULL;
                        }
                        kfree(task_arg_obj.strm_in_def);
                        task_arg_obj.strm_in_def = NULL;
                }
                if (task_arg_obj.strm_out_def) {
                        for (i = 0; i < MAX_OUTPUTS(hnode); i++) {
                                kfree(task_arg_obj.strm_out_def[i].sz_device);
                                task_arg_obj.strm_out_def[i].sz_device = NULL;
                        }
                        kfree(task_arg_obj.strm_out_def);
                        task_arg_obj.strm_out_def = NULL;
                }
                if (task_arg_obj.dsp_heap_res_addr) {
                        status = proc_un_map(hnode->processor, (void *)
                                             task_arg_obj.dsp_heap_addr,
                                             pr_ctxt);

                        status = proc_un_reserve_memory(hnode->processor,
                                                        (void *)
                                                        task_arg_obj.
                                                        dsp_heap_res_addr,
                                                        pr_ctxt);
#ifdef DSP_DMM_DEBUG
                        status = dmm_get_handle(p_proc_object, &dmm_mgr);
                        if (dmm_mgr)
                                dmm_mem_map_dump(dmm_mgr);
                        else
                                status = DSP_EHANDLE;
#endif
                }
        }
        if (node_type != NODE_MESSAGE) {
                kfree(hnode->stream_connect);
                hnode->stream_connect = NULL;
        }
        kfree(hnode->str_dev_name);
        hnode->str_dev_name = NULL;

        if (hnode->ntfy_obj) {
                ntfy_delete(hnode->ntfy_obj);
                kfree(hnode->ntfy_obj);
                hnode->ntfy_obj = NULL;
        }

        /* These were allocated in dcd_get_object_def (via node_allocate) */
        kfree(hnode->dcd_props.obj_data.node_obj.str_create_phase_fxn);
        hnode->dcd_props.obj_data.node_obj.str_create_phase_fxn = NULL;

        kfree(hnode->dcd_props.obj_data.node_obj.str_execute_phase_fxn);
        hnode->dcd_props.obj_data.node_obj.str_execute_phase_fxn = NULL;

        kfree(hnode->dcd_props.obj_data.node_obj.str_delete_phase_fxn);
        hnode->dcd_props.obj_data.node_obj.str_delete_phase_fxn = NULL;

        kfree(hnode->dcd_props.obj_data.node_obj.str_i_alg_name);
        hnode->dcd_props.obj_data.node_obj.str_i_alg_name = NULL;

        /* Free all SM address translator resources */
        kfree(hnode->xlator);
        kfree(hnode->nldr_node_obj);
        hnode->nldr_node_obj = NULL;
        hnode->node_mgr = NULL;
        kfree(hnode);
        hnode = NULL;
func_end:
        return;
}

/*
 *  ======== delete_node_mgr ========
 *  Purpose:
 *      Frees the node manager.
 */
static void delete_node_mgr(struct node_mgr *hnode_mgr)
{
        struct node_object *hnode, *tmp;

        if (hnode_mgr) {
                /* Free resources */
                if (hnode_mgr->dcd_mgr)
                        dcd_destroy_manager(hnode_mgr->dcd_mgr);

                /* Remove any elements remaining in lists */
                list_for_each_entry_safe(hnode, tmp, &hnode_mgr->node_list,
                                list_elem) {
                        list_del(&hnode->list_elem);
                        delete_node(hnode, NULL);
                }
                mutex_destroy(&hnode_mgr->node_mgr_lock);
                if (hnode_mgr->ntfy_obj) {
                        ntfy_delete(hnode_mgr->ntfy_obj);
                        kfree(hnode_mgr->ntfy_obj);
                }

                if (hnode_mgr->disp_obj)
                        disp_delete(hnode_mgr->disp_obj);

                if (hnode_mgr->strm_mgr_obj)
                        strm_delete(hnode_mgr->strm_mgr_obj);

                /* Delete the loader */
                if (hnode_mgr->nldr_obj)
                        hnode_mgr->nldr_fxns.delete(hnode_mgr->nldr_obj);

                kfree(hnode_mgr);
        }
}

/*
 *  ======== fill_stream_connect ========
 *  Purpose:
 *      Fills stream information.
 */
static void fill_stream_connect(struct node_object *node1,
                                struct node_object *node2,
                                u32 stream1, u32 stream2)
{
        u32 strm_index;
        struct dsp_streamconnect *strm1 = NULL;
        struct dsp_streamconnect *strm2 = NULL;
        enum node_type node1_type = NODE_TASK;
        enum node_type node2_type = NODE_TASK;

        node1_type = node_get_type(node1);
        node2_type = node_get_type(node2);
        if (node1 != (struct node_object *)DSP_HGPPNODE) {

                if (node1_type != NODE_DEVICE) {
                        strm_index = node1->num_inputs +
                            node1->num_outputs - 1;
                        strm1 = &(node1->stream_connect[strm_index]);
                        strm1->cb_struct = sizeof(struct dsp_streamconnect);
                        strm1->this_node_stream_index = stream1;
                }

                if (node2 != (struct node_object *)DSP_HGPPNODE) {
                        /* NODE == > NODE */
                        if (node1_type != NODE_DEVICE) {
                                strm1->connected_node = node2;
                                strm1->ui_connected_node_id = node2->node_uuid;
                                strm1->connected_node_stream_index = stream2;
                                strm1->connect_type = CONNECTTYPE_NODEOUTPUT;
                        }
                        if (node2_type != NODE_DEVICE) {
                                strm_index = node2->num_inputs +
                                    node2->num_outputs - 1;
                                strm2 = &(node2->stream_connect[strm_index]);
                                strm2->cb_struct =
                                    sizeof(struct dsp_streamconnect);
                                strm2->this_node_stream_index = stream2;
                                strm2->connected_node = node1;
                                strm2->ui_connected_node_id = node1->node_uuid;
                                strm2->connected_node_stream_index = stream1;
                                strm2->connect_type = CONNECTTYPE_NODEINPUT;
                        }
                } else if (node1_type != NODE_DEVICE)
                        strm1->connect_type = CONNECTTYPE_GPPOUTPUT;
        } else {
                /* GPP == > NODE */
                strm_index = node2->num_inputs + node2->num_outputs - 1;
                strm2 = &(node2->stream_connect[strm_index]);
                strm2->cb_struct = sizeof(struct dsp_streamconnect);
                strm2->this_node_stream_index = stream2;
                strm2->connect_type = CONNECTTYPE_GPPINPUT;
        }
}

/*
 *  ======== fill_stream_def ========
 *  Purpose:
 *      Fills Stream attributes.
 */
static void fill_stream_def(struct node_object *hnode,
                            struct node_strmdef *pstrm_def,
                            struct dsp_strmattr *pattrs)
{
        struct node_mgr *hnode_mgr = hnode->node_mgr;

        if (pattrs != NULL) {
                pstrm_def->num_bufs = pattrs->num_bufs;
                pstrm_def->buf_size =
                    pattrs->buf_size / hnode_mgr->dsp_data_mau_size;
                pstrm_def->seg_id = pattrs->seg_id;
                pstrm_def->buf_alignment = pattrs->buf_alignment;
                pstrm_def->timeout = pattrs->timeout;
        } else {
                pstrm_def->num_bufs = DEFAULTNBUFS;
                pstrm_def->buf_size =
                    DEFAULTBUFSIZE / hnode_mgr->dsp_data_mau_size;
                pstrm_def->seg_id = DEFAULTSEGID;
                pstrm_def->buf_alignment = DEFAULTALIGNMENT;
                pstrm_def->timeout = DEFAULTTIMEOUT;
        }
}

/*
 *  ======== free_stream ========
 *  Purpose:
 *      Updates the channel mask and frees the pipe id.
 */
static void free_stream(struct node_mgr *hnode_mgr, struct stream_chnl stream)
{
        /* Free up the pipe id unless other node has not yet been deleted. */
        if (stream.type == NODECONNECT) {
                if (test_bit(stream.dev_id, hnode_mgr->pipe_done_map)) {
                        /* The other node has already been deleted */
                        clear_bit(stream.dev_id, hnode_mgr->pipe_done_map);
                        clear_bit(stream.dev_id, hnode_mgr->pipe_map);
                } else {
                        /* The other node has not been deleted yet */
                        set_bit(stream.dev_id, hnode_mgr->pipe_done_map);
                }
        } else if (stream.type == HOSTCONNECT) {
                if (stream.dev_id < hnode_mgr->num_chnls) {
                        clear_bit(stream.dev_id, hnode_mgr->chnl_map);
                } else if (stream.dev_id < (2 * hnode_mgr->num_chnls)) {
                        /* dsp-dma */
                        clear_bit(stream.dev_id - (1 * hnode_mgr->num_chnls),
                                        hnode_mgr->dma_chnl_map);
                } else if (stream.dev_id < (3 * hnode_mgr->num_chnls)) {
                        /* zero-copy */
                        clear_bit(stream.dev_id - (2 * hnode_mgr->num_chnls),
                                        hnode_mgr->zc_chnl_map);
                }
        }
}

/*
 *  ======== get_fxn_address ========
 *  Purpose:
 *      Retrieves the address for create, execute or delete phase for a node.
 */
static int get_fxn_address(struct node_object *hnode, u32 * fxn_addr,
                                  u32 phase)
{
        char *pstr_fxn_name = NULL;
        struct node_mgr *hnode_mgr = hnode->node_mgr;
        int status = 0;

        switch (phase) {
        case CREATEPHASE:
                pstr_fxn_name =
                    hnode->dcd_props.obj_data.node_obj.str_create_phase_fxn;
                break;
        case EXECUTEPHASE:
                pstr_fxn_name =
                    hnode->dcd_props.obj_data.node_obj.str_execute_phase_fxn;
                break;
        case DELETEPHASE:
                pstr_fxn_name =
                    hnode->dcd_props.obj_data.node_obj.str_delete_phase_fxn;
                break;
        default:
                /* Should never get here */
                break;
        }

        status =
            hnode_mgr->nldr_fxns.get_fxn_addr(hnode->nldr_node_obj,
                                                  pstr_fxn_name, fxn_addr);

        return status;
}

/*
 *  ======== get_node_info ========
 *  Purpose:
 *      Retrieves the node information.
 */
void get_node_info(struct node_object *hnode, struct dsp_nodeinfo *node_info)
{
        u32 i;

        node_info->cb_struct = sizeof(struct dsp_nodeinfo);
        node_info->nb_node_database_props =
            hnode->dcd_props.obj_data.node_obj.ndb_props;
        node_info->execution_priority = hnode->prio;
        node_info->device_owner = hnode->device_owner;
        node_info->number_streams = hnode->num_inputs + hnode->num_outputs;
        node_info->node_env = hnode->node_env;

        node_info->ns_execution_state = node_get_state(hnode);

        /* Copy stream connect data */
        for (i = 0; i < hnode->num_inputs + hnode->num_outputs; i++)
                node_info->sc_stream_connection[i] = hnode->stream_connect[i];

}

/*
 *  ======== get_node_props ========
 *  Purpose:
 *      Retrieve node properties.
 */
static int get_node_props(struct dcd_manager *hdcd_mgr,
                                 struct node_object *hnode,
                                 const struct dsp_uuid *node_uuid,
                                 struct dcd_genericobj *dcd_prop)
{
        u32 len;
        struct node_msgargs *pmsg_args;
        struct node_taskargs *task_arg_obj;
        enum node_type node_type = NODE_TASK;
        struct dsp_ndbprops *pndb_props =
            &(dcd_prop->obj_data.node_obj.ndb_props);
        int status = 0;
        char sz_uuid[MAXUUIDLEN];

        status = dcd_get_object_def(hdcd_mgr, (struct dsp_uuid *)node_uuid,
                                    DSP_DCDNODETYPE, dcd_prop);

        if (!status) {
                hnode->ntype = node_type = pndb_props->ntype;

                /* Create UUID value to set in registry. */
                snprintf(sz_uuid, MAXUUIDLEN, "%pUL", node_uuid);
                dev_dbg(bridge, "(node) UUID: %s\n", sz_uuid);

                /* Fill in message args that come from NDB */
                if (node_type != NODE_DEVICE) {
                        pmsg_args = &(hnode->create_args.asa.node_msg_args);
                        pmsg_args->seg_id =
                            dcd_prop->obj_data.node_obj.msg_segid;
                        pmsg_args->notify_type =
                            dcd_prop->obj_data.node_obj.msg_notify_type;
                        pmsg_args->max_msgs = pndb_props->message_depth;
                        dev_dbg(bridge, "(node) Max Number of Messages: 0x%x\n",
                                pmsg_args->max_msgs);
                } else {
                        /* Copy device name */
                        len = strlen(pndb_props->ac_name);
                        hnode->str_dev_name = kzalloc(len + 1, GFP_KERNEL);
                        if (hnode->str_dev_name == NULL) {
                                status = -ENOMEM;
                        } else {
                                strncpy(hnode->str_dev_name,
                                        pndb_props->ac_name, len);
                        }
                }
        }
        if (!status) {
                /* Fill in create args that come from NDB */
                if (node_type == NODE_TASK || node_type == NODE_DAISSOCKET) {
                        task_arg_obj = &(hnode->create_args.asa.task_arg_obj);
                        task_arg_obj->prio = pndb_props->prio;
                        task_arg_obj->stack_size = pndb_props->stack_size;
                        task_arg_obj->sys_stack_size =
                            pndb_props->sys_stack_size;
                        task_arg_obj->stack_seg = pndb_props->stack_seg;
                        dev_dbg(bridge, "(node) Priority: 0x%x Stack Size: "
                                "0x%x words System Stack Size: 0x%x words "
                                "Stack Segment: 0x%x profile count : 0x%x\n",
                                task_arg_obj->prio, task_arg_obj->stack_size,
                                task_arg_obj->sys_stack_size,
                                task_arg_obj->stack_seg,
                                pndb_props->count_profiles);
                }
        }

        return status;
}

/*
 *  ======== get_proc_props ========
 *  Purpose:
 *      Retrieve the processor properties.
 */
static int get_proc_props(struct node_mgr *hnode_mgr,
                                 struct dev_object *hdev_obj)
{
        struct cfg_hostres *host_res;
        struct bridge_dev_context *pbridge_context;
        int status = 0;

        status = dev_get_bridge_context(hdev_obj, &pbridge_context);
        if (!pbridge_context)
                status = -EFAULT;

        if (!status) {
                host_res = pbridge_context->resources;
                if (!host_res)
                        return -EPERM;
                hnode_mgr->chnl_offset = host_res->chnl_offset;
                hnode_mgr->chnl_buf_size = host_res->chnl_buf_size;
                hnode_mgr->num_chnls = host_res->num_chnls;

                /*
                 *  PROC will add an API to get dsp_processorinfo.
                 *  Fill in default values for now.
                 */
                /* TODO -- Instead of hard coding, take from registry */
                hnode_mgr->proc_family = 6000;
                hnode_mgr->proc_type = 6410;
                hnode_mgr->min_pri = DSP_NODE_MIN_PRIORITY;
                hnode_mgr->max_pri = DSP_NODE_MAX_PRIORITY;
                hnode_mgr->dsp_word_size = DSPWORDSIZE;
                hnode_mgr->dsp_data_mau_size = DSPWORDSIZE;
                hnode_mgr->dsp_mau_size = 1;

        }
        return status;
}

/*
 *  ======== node_get_uuid_props ========
 *  Purpose:
 *      Fetch Node UUID properties from DCD/DOF file.
 */
int node_get_uuid_props(void *hprocessor,
                               const struct dsp_uuid *node_uuid,
                               struct dsp_ndbprops *node_props)
{
        struct node_mgr *hnode_mgr = NULL;
        struct dev_object *hdev_obj;
        int status = 0;
        struct dcd_nodeprops dcd_node_props;
        struct dsp_processorstate proc_state;

        if (hprocessor == NULL || node_uuid == NULL) {
                status = -EFAULT;
                goto func_end;
        }
        status = proc_get_state(hprocessor, &proc_state,
                                sizeof(struct dsp_processorstate));
        if (status)
                goto func_end;
        /* If processor is in error state then don't attempt
           to send the message */
        if (proc_state.proc_state == PROC_ERROR) {
                status = -EPERM;
                goto func_end;
        }

        status = proc_get_dev_object(hprocessor, &hdev_obj);
        if (hdev_obj) {
                status = dev_get_node_manager(hdev_obj, &hnode_mgr);
                if (hnode_mgr == NULL) {
                        status = -EFAULT;
                        goto func_end;
                }
        }

        /*
         * Enter the critical section. This is needed because
         * dcd_get_object_def will ultimately end up calling dbll_open/close,
         * which needs to be protected in order to not corrupt the zlib manager
         * (COD).
         */
        mutex_lock(&hnode_mgr->node_mgr_lock);

        dcd_node_props.str_create_phase_fxn = NULL;
        dcd_node_props.str_execute_phase_fxn = NULL;
        dcd_node_props.str_delete_phase_fxn = NULL;
        dcd_node_props.str_i_alg_name = NULL;

        status = dcd_get_object_def(hnode_mgr->dcd_mgr,
                (struct dsp_uuid *)node_uuid, DSP_DCDNODETYPE,
                (struct dcd_genericobj *)&dcd_node_props);

        if (!status) {
                *node_props = dcd_node_props.ndb_props;
                kfree(dcd_node_props.str_create_phase_fxn);

                kfree(dcd_node_props.str_execute_phase_fxn);

                kfree(dcd_node_props.str_delete_phase_fxn);

                kfree(dcd_node_props.str_i_alg_name);
        }
        /*  Leave the critical section, we're done. */
        mutex_unlock(&hnode_mgr->node_mgr_lock);
func_end:
        return status;
}

/*
 *  ======== get_rms_fxns ========
 *  Purpose:
 *      Retrieve the RMS functions.
 */
static int get_rms_fxns(struct node_mgr *hnode_mgr)
{
        s32 i;
        struct dev_object *dev_obj = hnode_mgr->dev_obj;
        int status = 0;

        static char *psz_fxns[NUMRMSFXNS] = {
                "RMS_queryServer",      /* RMSQUERYSERVER */
                "RMS_configureServer",  /* RMSCONFIGURESERVER */
                "RMS_createNode",       /* RMSCREATENODE */
                "RMS_executeNode",      /* RMSEXECUTENODE */
                "RMS_deleteNode",       /* RMSDELETENODE */
                "RMS_changeNodePriority",       /* RMSCHANGENODEPRIORITY */
                "RMS_readMemory",       /* RMSREADMEMORY */
                "RMS_writeMemory",      /* RMSWRITEMEMORY */
                "RMS_copy",     /* RMSCOPY */
        };

        for (i = 0; i < NUMRMSFXNS; i++) {
                status = dev_get_symbol(dev_obj, psz_fxns[i],
                                        &(hnode_mgr->fxn_addrs[i]));
                if (status) {
                        if (status == -ESPIPE) {
                                /*
                                 *  May be loaded dynamically (in the future),
                                 *  but return an error for now.
                                 */
                                dev_dbg(bridge, "%s: RMS function: %s currently"
                                        " not loaded\n", __func__, psz_fxns[i]);
                        } else {
                                dev_dbg(bridge, "%s: Symbol not found: %s "
                                        "status = 0x%x\n", __func__,
                                        psz_fxns[i], status);
                                break;
                        }
                }
        }

        return status;
}

/*
 *  ======== ovly ========
 *  Purpose:
 *      Called during overlay.Sends command to RMS to copy a block of data.
 */
static u32 ovly(void *priv_ref, u32 dsp_run_addr, u32 dsp_load_addr,
                u32 ul_num_bytes, u32 mem_space)
{
        struct node_object *hnode = (struct node_object *)priv_ref;
        struct node_mgr *hnode_mgr;
        u32 ul_bytes = 0;
        u32 ul_size;
        u32 ul_timeout;
        int status = 0;
        struct bridge_dev_context *hbridge_context;
        /* Function interface to Bridge driver*/
        struct bridge_drv_interface *intf_fxns;

        hnode_mgr = hnode->node_mgr;

        ul_size = ul_num_bytes / hnode_mgr->dsp_word_size;
        ul_timeout = hnode->timeout;

        /* Call new MemCopy function */
        intf_fxns = hnode_mgr->intf_fxns;
        status = dev_get_bridge_context(hnode_mgr->dev_obj, &hbridge_context);
        if (!status) {
                status =
                    (*intf_fxns->brd_mem_copy) (hbridge_context,
                                                dsp_run_addr, dsp_load_addr,
                                                ul_num_bytes, (u32) mem_space);
                if (!status)
                        ul_bytes = ul_num_bytes;
                else
                        pr_debug("%s: failed to copy brd memory, status 0x%x\n",
                                 __func__, status);
        } else {
                pr_debug("%s: failed to get Bridge context, status 0x%x\n",
                         __func__, status);
        }

        return ul_bytes;
}

/*
 *  ======== mem_write ========
 */
static u32 mem_write(void *priv_ref, u32 dsp_add, void *pbuf,
                     u32 ul_num_bytes, u32 mem_space)
{
        struct node_object *hnode = (struct node_object *)priv_ref;
        struct node_mgr *hnode_mgr;
        u16 mem_sect_type;
        u32 ul_timeout;
        int status = 0;
        struct bridge_dev_context *hbridge_context;
        /* Function interface to Bridge driver */
        struct bridge_drv_interface *intf_fxns;

        hnode_mgr = hnode->node_mgr;

        ul_timeout = hnode->timeout;
        mem_sect_type = (mem_space & DBLL_CODE) ? RMS_CODE : RMS_DATA;

        /* Call new MemWrite function */
        intf_fxns = hnode_mgr->intf_fxns;
        status = dev_get_bridge_context(hnode_mgr->dev_obj, &hbridge_context);
        status = (*intf_fxns->brd_mem_write) (hbridge_context, pbuf,
                                        dsp_add, ul_num_bytes, mem_sect_type);