Revert "staging: tidspbridge - remove dmm custom module"

This reverts commit 2ab573487a98c06fdfb34308f641f09369d61fa2.

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Omar Ramirez Luna <omar.ramirez@ti.com>

9 files changed, 747 insertions, 6 deletions

diff --git a/drivers/staging/tidspbridge/Makefile b/drivers/staging/tidspbridge/Makefile
index 50decc2935c..37bd3bcc03a 100644
--- a/drivers/staging/tidspbridge/Makefile
+++ b/drivers/staging/tidspbridge/Makefile
@@ -5,7 +5,7 @@ libcore = core/chnl_sm.o core/msg_sm.o core/io_sm.o core/tiomap3430.o \
                 core/tiomap3430_pwr.o core/tiomap_io.o core/dsp-mmu.o \
                 core/ue_deh.o core/wdt.o core/dsp-clock.o core/sync.o
 libpmgr = pmgr/chnl.o pmgr/io.o pmgr/msg.o pmgr/cod.o pmgr/dev.o pmgr/dspapi.o \
-                pmgr/cmm.o pmgr/dbll.o
+                pmgr/dmm.o pmgr/cmm.o pmgr/dbll.o
 librmgr = rmgr/dbdcd.o rmgr/disp.o rmgr/drv.o rmgr/mgr.o rmgr/node.o \
                 rmgr/proc.o rmgr/pwr.o rmgr/rmm.o rmgr/strm.o rmgr/dspdrv.o \
                 rmgr/nldr.o rmgr/drv_interface.o
diff --git a/drivers/staging/tidspbridge/core/tiomap3430.c b/drivers/staging/tidspbridge/core/tiomap3430.c
index d302e30443a..1425c50e72b 100644
--- a/drivers/staging/tidspbridge/core/tiomap3430.c
+++ b/drivers/staging/tidspbridge/core/tiomap3430.c
@@ -46,6 +46,7 @@
 /*  ----------------------------------- Platform Manager */
 #include <dspbridge/dev.h>
 #include <dspbridge/dspapi.h>
+#include <dspbridge/dmm.h>
 #include <dspbridge/wdt.h>
 
 /*  ----------------------------------- Local */
diff --git a/drivers/staging/tidspbridge/include/dspbridge/dev.h b/drivers/staging/tidspbridge/include/dspbridge/dev.h
index 9bdd48f5742..357458fadd2 100644
--- a/drivers/staging/tidspbridge/include/dspbridge/dev.h
+++ b/drivers/staging/tidspbridge/include/dspbridge/dev.h
@@ -27,6 +27,7 @@
 #include <dspbridge/nodedefs.h>
 #include <dspbridge/dispdefs.h>
 #include <dspbridge/dspdefs.h>
+#include <dspbridge/dmm.h>
 #include <dspbridge/host_os.h>
 
 /*  ----------------------------------- This */
@@ -233,6 +234,29 @@ extern int dev_get_cmm_mgr(struct dev_object *hdev_obj,
                                   struct cmm_object **mgr);
 
 /*
+ *  ======== dev_get_dmm_mgr ========
+ *  Purpose:
+ *      Retrieve the handle to the dynamic memory manager created for this
+ *      device.
+ *  Parameters:
+ *      hdev_obj:     Handle to device object created with
+ *                      dev_create_device().
+ *      *mgr:           Ptr to location to store handle.
+ *  Returns:
+ *      0:        Success.
+ *      -EFAULT:    Invalid hdev_obj.
+ *  Requires:
+ *      mgr != NULL.
+ *      DEV Initialized.
+ *  Ensures:
+ *      0:        *mgr contains a handle to a channel manager object,
+ *                      or NULL.
+ *      else:           *mgr is NULL.
+ */
+extern int dev_get_dmm_mgr(struct dev_object *hdev_obj,
+                                  struct dmm_object **mgr);
+
+/*
  *  ======== dev_get_cod_mgr ========
  *  Purpose:
  *      Retrieve the COD manager create for this device.
diff --git a/drivers/staging/tidspbridge/include/dspbridge/dmm.h b/drivers/staging/tidspbridge/include/dspbridge/dmm.h
new file mode 100644
index 00000000000..6c58335c5f6
--- /dev/null
+++ b/drivers/staging/tidspbridge/include/dspbridge/dmm.h
@@ -0,0 +1,75 @@
+/*
+ * dmm.h
+ *
+ * DSP-BIOS Bridge driver support functions for TI OMAP processors.
+ *
+ * The Dynamic Memory Mapping(DMM) module manages the DSP Virtual address
+ * space that can be directly mapped to any MPU buffer or memory region.
+ *
+ * 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.
+ */
+
+#ifndef DMM_
+#define DMM_
+
+#include <dspbridge/dbdefs.h>
+
+struct dmm_object;
+
+/* DMM attributes used in dmm_create() */
+struct dmm_mgrattrs {
+        u32 reserved;
+};
+
+#define DMMPOOLSIZE      0x4000000
+
+/*
+ *  ======== dmm_get_handle ========
+ *  Purpose:
+ *      Return the dynamic memory manager object for this device.
+ *      This is typically called from the client process.
+ */
+
+extern int dmm_get_handle(void *hprocessor,
+                                 struct dmm_object **dmm_manager);
+
+extern int dmm_reserve_memory(struct dmm_object *dmm_mgr,
+                                     u32 size, u32 *prsv_addr);
+
+extern int dmm_un_reserve_memory(struct dmm_object *dmm_mgr,
+                                        u32 rsv_addr);
+
+extern int dmm_map_memory(struct dmm_object *dmm_mgr, u32 addr,
+                                 u32 size);
+
+extern int dmm_un_map_memory(struct dmm_object *dmm_mgr,
+                                    u32 addr, u32 *psize);
+
+extern int dmm_destroy(struct dmm_object *dmm_mgr);
+
+extern int dmm_delete_tables(struct dmm_object *dmm_mgr);
+
+extern int dmm_create(struct dmm_object **dmm_manager,
+                             struct dev_object *hdev_obj,
+                             const struct dmm_mgrattrs *mgr_attrts);
+
+extern bool dmm_init(void);
+
+extern void dmm_exit(void);
+
+extern int dmm_create_tables(struct dmm_object *dmm_mgr,
+                                    u32 addr, u32 size);
+
+#ifdef DSP_DMM_DEBUG
+u32 dmm_mem_map_dump(struct dmm_object *dmm_mgr);
+#endif
+
+#endif /* DMM_ */
diff --git a/drivers/staging/tidspbridge/include/dspbridge/drv.h b/drivers/staging/tidspbridge/include/dspbridge/drv.h
index 75a2c9b5c6f..427f38b7b43 100644
--- a/drivers/staging/tidspbridge/include/dspbridge/drv.h
+++ b/drivers/staging/tidspbridge/include/dspbridge/drv.h
@@ -108,6 +108,12 @@ struct dmm_map_object {
         struct bridge_dma_map_info dma_info;
 };
 
+/* Used for DMM reserved memory accounting */
+struct dmm_rsv_object {
+        struct list_head link;
+        u32 dsp_reserved_addr;
+};
+
 /* New structure (member of process context) abstracts DMM resource info */
 struct dspheap_res_object {
         s32 heap_allocated;     /* DMM status */
diff --git a/drivers/staging/tidspbridge/pmgr/dev.c b/drivers/staging/tidspbridge/pmgr/dev.c
index 7b30267ef0e..e3c78fbfb3c 100644
--- a/drivers/staging/tidspbridge/pmgr/dev.c
+++ b/drivers/staging/tidspbridge/pmgr/dev.c
@@ -34,6 +34,7 @@
 #include <dspbridge/cod.h>
 #include <dspbridge/drv.h>
 #include <dspbridge/proc.h>
+#include <dspbridge/dmm.h>
 
 /*  ----------------------------------- Resource Manager */
 #include <dspbridge/mgr.h>
@@ -74,6 +75,7 @@ struct dev_object {
         struct msg_mgr *hmsg_mgr;       /* Message manager. */
         struct io_mgr *hio_mgr; /* IO manager (CHNL, msg_ctrl) */
         struct cmm_object *hcmm_mgr;    /* SM memory manager. */
+        struct dmm_object *dmm_mgr;     /* Dynamic memory manager. */
         struct ldr_module *module_obj;  /* Bridge Module handle. */
         u32 word_size;          /* DSP word size: quick access. */
         struct drv_object *hdrv_obj;    /* Driver Object */
@@ -248,6 +250,9 @@ int dev_create_device(struct dev_object **device_obj,
                         /* Instantiate the DEH module */
                         status = bridge_deh_create(&dev_obj->hdeh_mgr, dev_obj);
                 }
+                /* Create DMM mgr . */
+                status = dmm_create(&dev_obj->dmm_mgr,
+                                    (struct dev_object *)dev_obj, NULL);
         }
         /* Add the new DEV_Object to the global list: */
         if (!status) {
@@ -273,6 +278,8 @@ leave:
                         kfree(dev_obj->proc_list);
                         if (dev_obj->cod_mgr)
                                 cod_delete(dev_obj->cod_mgr);
+                        if (dev_obj->dmm_mgr)
+                                dmm_destroy(dev_obj->dmm_mgr);
                         kfree(dev_obj);
                 }
 
@@ -382,6 +389,11 @@ int dev_destroy_device(struct dev_object *hdev_obj)
                         dev_obj->hcmm_mgr = NULL;
                 }
 
+                if (dev_obj->dmm_mgr) {
+                        dmm_destroy(dev_obj->dmm_mgr);
+                        dev_obj->dmm_mgr = NULL;
+                }
+
                 /* Call the driver's bridge_dev_destroy() function: */
                 /* Require of DevDestroy */
                 if (dev_obj->hbridge_context) {
@@ -462,6 +474,32 @@ int dev_get_cmm_mgr(struct dev_object *hdev_obj,
 }
 
 /*
+ *  ======== dev_get_dmm_mgr ========
+ *  Purpose:
+ *      Retrieve the handle to the dynamic memory manager created for this
+ *      device.
+ */
+int dev_get_dmm_mgr(struct dev_object *hdev_obj,
+                           struct dmm_object **mgr)
+{
+        int status = 0;
+        struct dev_object *dev_obj = hdev_obj;
+
+        DBC_REQUIRE(refs > 0);
+        DBC_REQUIRE(mgr != NULL);
+
+        if (hdev_obj) {
+                *mgr = dev_obj->dmm_mgr;
+        } else {
+                *mgr = NULL;
+                status = -EFAULT;
+        }
+
+        DBC_ENSURE(!status || (mgr != NULL && *mgr == NULL));
+        return status;
+}
+
+/*
  *  ======== dev_get_cod_mgr ========
  *  Purpose:
  *      Retrieve the COD manager create for this device.
@@ -713,8 +751,10 @@ void dev_exit(void)
 
         refs--;
 
-        if (refs == 0)
+        if (refs == 0) {
                 cmm_exit();
+                dmm_exit();
+        }
 
         DBC_ENSURE(refs >= 0);
 }
@@ -726,12 +766,25 @@ void dev_exit(void)
  */
 bool dev_init(void)
 {
-        bool ret = true;
+        bool cmm_ret, dmm_ret, ret = true;
 
         DBC_REQUIRE(refs >= 0);
 
-        if (refs == 0)
-                ret = cmm_init();
+        if (refs == 0) {
+                cmm_ret = cmm_init();
+                dmm_ret = dmm_init();
+
+                ret = cmm_ret && dmm_ret;
+
+                if (!ret) {
+                        if (cmm_ret)
+                                cmm_exit();
+
+                        if (dmm_ret)
+                                dmm_exit();
+
+                }
+        }
 
         if (ret)
                 refs++;
diff --git a/drivers/staging/tidspbridge/pmgr/dmm.c b/drivers/staging/tidspbridge/pmgr/dmm.c
new file mode 100644
index 00000000000..8685233d762
--- /dev/null
+++ b/drivers/staging/tidspbridge/pmgr/dmm.c
@@ -0,0 +1,533 @@
+/*
+ * dmm.c
+ *
+ * DSP-BIOS Bridge driver support functions for TI OMAP processors.
+ *
+ * The Dynamic Memory Manager (DMM) module manages the DSP Virtual address
+ * space that can be directly mapped to any MPU buffer or memory region
+ *
+ * Notes:
+ *   Region: Generic memory entitiy having a start address and a size
+ *   Chunk:  Reserved region
+ *
+ * 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>
+
+/*  ----------------------------------- Host OS */
+#include <dspbridge/host_os.h>
+
+/*  ----------------------------------- DSP/BIOS Bridge */
+#include <dspbridge/dbdefs.h>
+
+/*  ----------------------------------- Trace & Debug */
+#include <dspbridge/dbc.h>
+
+/*  ----------------------------------- OS Adaptation Layer */
+#include <dspbridge/sync.h>
+
+/*  ----------------------------------- Platform Manager */
+#include <dspbridge/dev.h>
+#include <dspbridge/proc.h>
+
+/*  ----------------------------------- This */
+#include <dspbridge/dmm.h>
+
+/*  ----------------------------------- Defines, Data Structures, Typedefs */
+#define DMM_ADDR_VIRTUAL(a) \
+        (((struct map_page *)(a) - virtual_mapping_table) * PG_SIZE4K +\
+        dyn_mem_map_beg)
+#define DMM_ADDR_TO_INDEX(a) (((a) - dyn_mem_map_beg) / PG_SIZE4K)
+
+/* DMM Mgr */
+struct dmm_object {
+        /* Dmm Lock is used to serialize access mem manager for
+         * multi-threads. */
+        spinlock_t dmm_lock;    /* Lock to access dmm mgr */
+};
+
+/*  ----------------------------------- Globals */
+static u32 refs;                /* module reference count */
+struct map_page {
+        u32 region_size:15;
+        u32 mapped_size:15;
+        u32 reserved:1;
+        u32 mapped:1;
+};
+
+/*  Create the free list */
+static struct map_page *virtual_mapping_table;
+static u32 free_region;         /* The index of free region */
+static u32 free_size;
+static u32 dyn_mem_map_beg;     /* The Beginning of dynamic memory mapping */
+static u32 table_size;          /* The size of virt and phys pages tables */
+
+/*  ----------------------------------- Function Prototypes */
+static struct map_page *get_region(u32 addr);
+static struct map_page *get_free_region(u32 len);
+static struct map_page *get_mapped_region(u32 addrs);
+
+/*  ======== dmm_create_tables ========
+ *  Purpose:
+ *      Create table to hold the information of physical address
+ *      the buffer pages that is passed by the user, and the table
+ *      to hold the information of the virtual memory that is reserved
+ *      for DSP.
+ */
+int dmm_create_tables(struct dmm_object *dmm_mgr, u32 addr, u32 size)
+{
+        struct dmm_object *dmm_obj = (struct dmm_object *)dmm_mgr;
+        int status = 0;
+
+        status = dmm_delete_tables(dmm_obj);
+        if (!status) {
+                dyn_mem_map_beg = addr;
+                table_size = PG_ALIGN_HIGH(size, PG_SIZE4K) / PG_SIZE4K;
+                /*  Create the free list */
+                virtual_mapping_table = __vmalloc(table_size *
+                                sizeof(struct map_page), GFP_KERNEL |
+                                __GFP_HIGHMEM | __GFP_ZERO, PAGE_KERNEL);
+                if (virtual_mapping_table == NULL)
+                        status = -ENOMEM;
+                else {
+                        /* On successful allocation,
+                         * all entries are zero ('free') */
+                        free_region = 0;
+                        free_size = table_size * PG_SIZE4K;
+                        virtual_mapping_table[0].region_size = table_size;
+                }
+        }
+
+        if (status)
+                pr_err("%s: failure, status 0x%x\n", __func__, status);
+
+        return status;
+}
+
+/*
+ *  ======== dmm_create ========
+ *  Purpose:
+ *      Create a dynamic memory manager object.
+ */
+int dmm_create(struct dmm_object **dmm_manager,
+                      struct dev_object *hdev_obj,
+                      const struct dmm_mgrattrs *mgr_attrts)
+{
+        struct dmm_object *dmm_obj = NULL;
+        int status = 0;
+        DBC_REQUIRE(refs > 0);
+        DBC_REQUIRE(dmm_manager != NULL);
+
+        *dmm_manager = NULL;
+        /* create, zero, and tag a cmm mgr object */
+        dmm_obj = kzalloc(sizeof(struct dmm_object), GFP_KERNEL);
+        if (dmm_obj != NULL) {
+                spin_lock_init(&dmm_obj->dmm_lock);
+                *dmm_manager = dmm_obj;
+        } else {
+                status = -ENOMEM;
+        }
+
+        return status;
+}
+
+/*
+ *  ======== dmm_destroy ========
+ *  Purpose:
+ *      Release the communication memory manager resources.
+ */
+int dmm_destroy(struct dmm_object *dmm_mgr)
+{
+        struct dmm_object *dmm_obj = (struct dmm_object *)dmm_mgr;
+        int status = 0;
+
+        DBC_REQUIRE(refs > 0);
+        if (dmm_mgr) {
+                status = dmm_delete_tables(dmm_obj);
+                if (!status)
+                        kfree(dmm_obj);
+        } else
+                status = -EFAULT;
+
+        return status;
+}
+
+/*
+ *  ======== dmm_delete_tables ========
+ *  Purpose:
+ *      Delete DMM Tables.
+ */
+int dmm_delete_tables(struct dmm_object *dmm_mgr)
+{
+        int status = 0;
+
+        DBC_REQUIRE(refs > 0);
+        /* Delete all DMM tables */
+        if (dmm_mgr)
+                vfree(virtual_mapping_table);
+        else
+                status = -EFAULT;
+        return status;
+}
+
+/*
+ *  ======== dmm_exit ========
+ *  Purpose:
+ *      Discontinue usage of module; free resources when reference count
+ *      reaches 0.
+ */
+void dmm_exit(void)
+{
+        DBC_REQUIRE(refs > 0);
+
+        refs--;
+}
+
+/*
+ *  ======== dmm_get_handle ========
+ *  Purpose:
+ *      Return the dynamic memory manager object for this device.
+ *      This is typically called from the client process.
+ */
+int dmm_get_handle(void *hprocessor, struct dmm_object **dmm_manager)
+{
+        int status = 0;
+        struct dev_object *hdev_obj;
+
+        DBC_REQUIRE(refs > 0);
+        DBC_REQUIRE(dmm_manager != NULL);
+        if (hprocessor != NULL)
+                status = proc_get_dev_object(hprocessor, &hdev_obj);
+        else
+                hdev_obj = dev_get_first();     /* default */
+
+        if (!status)
+                status = dev_get_dmm_mgr(hdev_obj, dmm_manager);
+
+        return status;
+}
+
+/*
+ *  ======== dmm_init ========
+ *  Purpose:
+ *      Initializes private state of DMM module.
+ */
+bool dmm_init(void)
+{
+        bool ret = true;
+
+        DBC_REQUIRE(refs >= 0);
+
+        if (ret)
+                refs++;
+
+        DBC_ENSURE((ret && (refs > 0)) || (!ret && (refs >= 0)));
+
+        virtual_mapping_table = NULL;
+        table_size = 0;
+
+        return ret;
+}
+
+/*
+ *  ======== dmm_map_memory ========
+ *  Purpose:
+ *      Add a mapping block to the reserved chunk. DMM assumes that this block
+ *  will be mapped in the DSP/IVA's address space. DMM returns an error if a
+ *  mapping overlaps another one. This function stores the info that will be
+ *  required later while unmapping the block.
+ */
+int dmm_map_memory(struct dmm_object *dmm_mgr, u32 addr, u32 size)
+{
+        struct dmm_object *dmm_obj = (struct dmm_object *)dmm_mgr;
+        struct map_page *chunk;
+        int status = 0;
+
+        spin_lock(&dmm_obj->dmm_lock);
+        /* Find the Reserved memory chunk containing the DSP block to
+         * be mapped */
+        chunk = (struct map_page *)get_region(addr);
+        if (chunk != NULL) {
+                /* Mark the region 'mapped', leave the 'reserved' info as-is */
+                chunk->mapped = true;
+                chunk->mapped_size = (size / PG_SIZE4K);
+        } else
+                status = -ENOENT;
+        spin_unlock(&dmm_obj->dmm_lock);
+
+        dev_dbg(bridge, "%s dmm_mgr %p, addr %x, size %x\n\tstatus %x, "
+                "chunk %p", __func__, dmm_mgr, addr, size, status, chunk);
+
+        return status;
+}
+
+/*
+ *  ======== dmm_reserve_memory ========
+ *  Purpose:
+ *      Reserve a chunk of virtually contiguous DSP/IVA address space.
+ */
+int dmm_reserve_memory(struct dmm_object *dmm_mgr, u32 size,
+                              u32 *prsv_addr)
+{
+        int status = 0;
+        struct dmm_object *dmm_obj = (struct dmm_object *)dmm_mgr;
+        struct map_page *node;
+        u32 rsv_addr = 0;
+        u32 rsv_size = 0;
+
+        spin_lock(&dmm_obj->dmm_lock);
+
+        /* Try to get a DSP chunk from the free list */
+        node = get_free_region(size);
+        if (node != NULL) {
+                /*  DSP chunk of given size is available. */
+                rsv_addr = DMM_ADDR_VIRTUAL(node);
+                /* Calculate the number entries to use */
+                rsv_size = size / PG_SIZE4K;
+                if (rsv_size < node->region_size) {
+                        /* Mark remainder of free region */
+                        node[rsv_size].mapped = false;
+                        node[rsv_size].reserved = false;
+                        node[rsv_size].region_size =
+                            node->region_size - rsv_size;
+                        node[rsv_size].mapped_size = 0;
+                }
+                /*  get_region will return first fit chunk. But we only use what
+                   is requested. */
+                node->mapped = false;
+                node->reserved = true;
+                node->region_size = rsv_size;
+                node->mapped_size = 0;
+                /* Return the chunk's starting address */
+                *prsv_addr = rsv_addr;
+        } else
+                /*dSP chunk of given size is not available */
+                status = -ENOMEM;
+
+        spin_unlock(&dmm_obj->dmm_lock);
+
+        dev_dbg(bridge, "%s dmm_mgr %p, size %x, prsv_addr %p\n\tstatus %x, "
+                "rsv_addr %x, rsv_size %x\n", __func__, dmm_mgr, size,
+                prsv_addr, status, rsv_addr, rsv_size);
+
+        return status;
+}
+
+/*
+ *  ======== dmm_un_map_memory ========
+ *  Purpose:
+ *      Remove the mapped block from the reserved chunk.
+ */
+int dmm_un_map_memory(struct dmm_object *dmm_mgr, u32 addr, u32 *psize)
+{
+        struct dmm_object *dmm_obj = (struct dmm_object *)dmm_mgr;
+        struct map_page *chunk;
+        int status = 0;
+
+        spin_lock(&dmm_obj->dmm_lock);
+        chunk = get_mapped_region(addr);
+        if (chunk == NULL)
+                status = -ENOENT;
+
+        if (!status) {
+                /* Unmap the region */
+                *psize = chunk->mapped_size * PG_SIZE4K;
+                chunk->mapped = false;
+                chunk->mapped_size = 0;
+        }
+        spin_unlock(&dmm_obj->dmm_lock);
+
+        dev_dbg(bridge, "%s: dmm_mgr %p, addr %x, psize %p\n\tstatus %x, "
+                "chunk %p\n", __func__, dmm_mgr, addr, psize, status, chunk);
+
+        return status;
+}
+
+/*
+ *  ======== dmm_un_reserve_memory ========
+ *  Purpose:
+ *      Free a chunk of reserved DSP/IVA address space.
+ */
+int dmm_un_reserve_memory(struct dmm_object *dmm_mgr, u32 rsv_addr)
+{
+        struct dmm_object *dmm_obj = (struct dmm_object *)dmm_mgr;
+        struct map_page *chunk;
+        u32 i;
+        int status = 0;
+        u32 chunk_size;
+
+        spin_lock(&dmm_obj->dmm_lock);
+
+        /* Find the chunk containing the reserved address */
+        chunk = get_mapped_region(rsv_addr);
+        if (chunk == NULL)
+                status = -ENOENT;
+
+        if (!status) {
+                /* Free all the mapped pages for this reserved region */
+                i = 0;
+                while (i < chunk->region_size) {
+                        if (chunk[i].mapped) {
+                                /* Remove mapping from the page tables. */
+                                chunk_size = chunk[i].mapped_size;
+                                /* Clear the mapping flags */
+                                chunk[i].mapped = false;
+                                chunk[i].mapped_size = 0;
+                                i += chunk_size;
+                        } else
+                                i++;
+                }
+                /* Clear the flags (mark the region 'free') */
+                chunk->reserved = false;
+                /* NOTE: We do NOT coalesce free regions here.
+                 * Free regions are coalesced in get_region(), as it traverses
+                 *the whole mapping table
+                 */
+        }
+        spin_unlock(&dmm_obj->dmm_lock);
+
+        dev_dbg(bridge, "%s: dmm_mgr %p, rsv_addr %x\n\tstatus %x chunk %p",
+                __func__, dmm_mgr, rsv_addr, status, chunk);
+
+        return status;
+}
+
+/*
+ *  ======== get_region ========
+ *  Purpose:
+ *      Returns a region containing the specified memory region
+ */
+static struct map_page *get_region(u32 addr)
+{
+        struct map_page *curr_region = NULL;
+        u32 i = 0;
+
+        if (virtual_mapping_table != NULL) {
+                /* find page mapped by this address */
+                i = DMM_ADDR_TO_INDEX(addr);
+                if (i < table_size)
+                        curr_region = virtual_mapping_table + i;
+        }
+
+        dev_dbg(bridge, "%s: curr_region %p, free_region %d, free_size %d\n",
+                __func__, curr_region, free_region, free_size);
+        return curr_region;
+}
+
+/*
+ *  ======== get_free_region ========
+ *  Purpose:
+ *  Returns the requested free region
+ */
+static struct map_page *get_free_region(u32 len)
+{
+        struct map_page *curr_region = NULL;
+        u32 i = 0;
+        u32 region_size = 0;
+        u32 next_i = 0;
+
+        if (virtual_mapping_table == NULL)
+                return curr_region;
+        if (len > free_size) {
+                /* Find the largest free region
+                 * (coalesce during the traversal) */
+                while (i < table_size) {
+                        region_size = virtual_mapping_table[i].region_size;
+                        next_i = i + region_size;
+                        if (virtual_mapping_table[i].reserved == false) {
+                                /* Coalesce, if possible */
+                                if (next_i < table_size &&
+                                    virtual_mapping_table[next_i].reserved
+                                    == false) {
+                                        virtual_mapping_table[i].region_size +=
+                                            virtual_mapping_table
+                                            [next_i].region_size;
+                                        continue;
+                                }
+                                region_size *= PG_SIZE4K;
+                                if (region_size > free_size) {
+                                        free_region = i;
+                                        free_size = region_size;
+                                }
+                        }
+                        i = next_i;
+                }
+        }
+        if (len <= free_size) {
+                curr_region = virtual_mapping_table + free_region;
+                free_region += (len / PG_SIZE4K);
+                free_size -= len;
+        }
+        return curr_region;
+}
+
+/*
+ *  ======== get_mapped_region ========
+ *  Purpose:
+ *  Returns the requestedmapped region
+ */
+static struct map_page *get_mapped_region(u32 addrs)
+{
+        u32 i = 0;
+        struct map_page *curr_region = NULL;
+
+        if (virtual_mapping_table == NULL)
+                return curr_region;
+
+        i = DMM_ADDR_TO_INDEX(addrs);
+        if (i < table_size && (virtual_mapping_table[i].mapped ||
+                               virtual_mapping_table[i].reserved))
+                curr_region = virtual_mapping_table + i;
+        return curr_region;
+}
+
+#ifdef DSP_DMM_DEBUG
+u32 dmm_mem_map_dump(struct dmm_object *dmm_mgr)
+{
+        struct map_page *curr_node = NULL;
+        u32 i;
+        u32 freemem = 0;
+        u32 bigsize = 0;
+
+        spin_lock(&dmm_mgr->dmm_lock);
+
+        if (virtual_mapping_table != NULL) {
+                for (i = 0; i < table_size; i +=
+                     virtual_mapping_table[i].region_size) {
+                        curr_node = virtual_mapping_table + i;
+                        if (curr_node->reserved) {
+                                /*printk("RESERVED size = 0x%x, "
+                                   "Map size = 0x%x\n",
+                                   (curr_node->region_size * PG_SIZE4K),
+                                   (curr_node->mapped == false) ? 0 :
+                                   (curr_node->mapped_size * PG_SIZE4K));
+                                 */
+                        } else {
+/*                              printk("UNRESERVED size = 0x%x\n",
+                                        (curr_node->region_size * PG_SIZE4K));
+ */
+                                freemem += (curr_node->region_size * PG_SIZE4K);
+                                if (curr_node->region_size > bigsize)
+                                        bigsize = curr_node->region_size;
+                        }
+                }
+        }
+        spin_unlock(&dmm_mgr->dmm_lock);
+        printk(KERN_INFO "Total DSP VA FREE memory = %d Mbytes\n",
+               freemem / (1024 * 1024));
+        printk(KERN_INFO "Total DSP VA USED memory= %d Mbytes \n",
+               (((table_size * PG_SIZE4K) - freemem)) / (1024 * 1024));
+        printk(KERN_INFO "DSP VA - Biggest FREE block = %d Mbytes \n\n",
+               (bigsize * PG_SIZE4K / (1024 * 1024)));
+
+        return 0;
+}
+#endif
diff --git a/drivers/staging/tidspbridge/rmgr/node.c b/drivers/staging/tidspbridge/rmgr/node.c
index a660247f527..ccb1811a470 100644
--- a/drivers/staging/tidspbridge/rmgr/node.c
+++ b/drivers/staging/tidspbridge/rmgr/node.c
@@ -56,6 +56,7 @@
 /*  ----------------------------------- This */
 #include <dspbridge/nodepriv.h>
 #include <dspbridge/node.h>
+#include <dspbridge/dmm.h>
 
 /* Static/Dynamic Loader includes */
 #include <dspbridge/dbll.h>
@@ -316,6 +317,10 @@ int node_allocate(struct proc_object *hprocessor,
         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;
 
@@ -425,6 +430,16 @@ int node_allocate(struct proc_object *hprocessor,
         if (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;
@@ -2484,7 +2499,11 @@ static void delete_node(struct node_object *hnode,
         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->hprocessor;
+#endif
         int status;
         if (!hnode)
                 goto func_end;
@@ -2545,6 +2564,13 @@ static void delete_node(struct node_object *hnode,
                         status = proc_un_map(hnode->hprocessor, (void *)
                                              task_arg_obj.udsp_heap_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) {
diff --git a/drivers/staging/tidspbridge/rmgr/proc.c b/drivers/staging/tidspbridge/rmgr/proc.c
index 7a15a02efed..429f3549965 100644
--- a/drivers/staging/tidspbridge/rmgr/proc.c
+++ b/drivers/staging/tidspbridge/rmgr/proc.c
@@ -39,6 +39,7 @@
 #include <dspbridge/cod.h>
 #include <dspbridge/dev.h>
 #include <dspbridge/procpriv.h>
+#include <dspbridge/dmm.h>
 
 /*  ----------------------------------- Resource Manager */
 #include <dspbridge/mgr.h>
@@ -1077,6 +1078,7 @@ int proc_load(void *hprocessor, const s32 argc_index,
         s32 cnew_envp;          /* "  " in new_envp[] */
         s32 nproc_id = 0;       /* Anticipate MP version. */
         struct dcd_manager *hdcd_handle;
+        struct dmm_object *dmm_mgr;
         u32 dw_ext_end;
         u32 proc_id;
         int brd_state;
@@ -1267,6 +1269,25 @@ int proc_load(void *hprocessor, const s32 argc_index,
                         if (!status)
                                 status = cod_get_sym_value(cod_mgr, EXTEND,
                                                            &dw_ext_end);
+
+                        /* Reset DMM structs and add an initial free chunk */
+                        if (!status) {
+                                status =
+                                    dev_get_dmm_mgr(p_proc_object->hdev_obj,
+                                                    &dmm_mgr);
+                                if (dmm_mgr) {
+                                        /* Set dw_ext_end to DMM START u8
+                                         * address */
+                                        dw_ext_end =
+                                            (dw_ext_end + 1) * DSPWORDSIZE;
+                                        /* DMM memory is from EXT_END */
+                                        status = dmm_create_tables(dmm_mgr,
+                                                                   dw_ext_end,
+                                                                   DMMPOOLSIZE);
+                                } else {
+                                        status = -EFAULT;
+                                }
+                        }
                 }
         }
         /* Restore the original argv[0] */
@@ -1369,6 +1390,7 @@ int proc_map(void *hprocessor, void *pmpu_addr, u32 ul_size,
                 map_obj->dsp_addr = (va_align |
                                         ((u32)pmpu_addr & (PG_SIZE4K - 1)));
                 *pp_map_addr = (void *)map_obj->dsp_addr;
+                pr_err("%s: mapped address %x\n", __func__, *pp_map_addr);
         } else {
                 remove_mapping_information(pr_ctxt, va_align);
         }
@@ -1611,6 +1633,7 @@ int proc_un_map(void *hprocessor, void *map_addr,
         int status = 0;
         struct proc_object *p_proc_object = (struct proc_object *)hprocessor;
         u32 va_align;
+        u32 size_align;
 
         va_align = PG_ALIGN_LOW((u32) map_addr, PG_SIZE4K);
         if (!p_proc_object) {