diff options
Diffstat (limited to 'drivers/staging/tidspbridge/rmgr/drv.c')
| -rw-r--r-- | drivers/staging/tidspbridge/rmgr/drv.c | 816 |
1 files changed, 816 insertions, 0 deletions
diff --git a/drivers/staging/tidspbridge/rmgr/drv.c b/drivers/staging/tidspbridge/rmgr/drv.c new file mode 100644 index 00000000..be26917a --- /dev/null +++ b/drivers/staging/tidspbridge/rmgr/drv.c @@ -0,0 +1,816 @@ +/* + * drv.c + * + * DSP-BIOS Bridge driver support functions for TI OMAP processors. + * + * DSP/BIOS Bridge resource allocation module. + * + * 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/list.h> + +/* ----------------------------------- Host OS */ +#include <dspbridge/host_os.h> + +/* ----------------------------------- DSP/BIOS Bridge */ +#include <dspbridge/dbdefs.h> + +/* ----------------------------------- This */ +#include <dspbridge/drv.h> +#include <dspbridge/dev.h> + +#include <dspbridge/node.h> +#include <dspbridge/proc.h> +#include <dspbridge/strm.h> +#include <dspbridge/nodepriv.h> +#include <dspbridge/dspchnl.h> +#include <dspbridge/resourcecleanup.h> + +/* ----------------------------------- Defines, Data Structures, Typedefs */ +struct drv_object { + struct list_head dev_list; + struct list_head dev_node_string; +}; + +/* + * This is the Device Extension. Named with the Prefix + * DRV_ since it is living in this module + */ +struct drv_ext { + struct list_head link; + char sz_string[MAXREGPATHLENGTH]; +}; + +/* ----------------------------------- Globals */ +static bool ext_phys_mem_pool_enabled; +struct ext_phys_mem_pool { + u32 phys_mem_base; + u32 phys_mem_size; + u32 virt_mem_base; + u32 next_phys_alloc_ptr; +}; +static struct ext_phys_mem_pool ext_mem_pool; + +/* ----------------------------------- Function Prototypes */ +static int request_bridge_resources(struct cfg_hostres *res); + + +/* GPP PROCESS CLEANUP CODE */ + +static int drv_proc_free_node_res(int id, void *p, void *data); + +/* Allocate and add a node resource element +* This function is called from .Node_Allocate. */ +int drv_insert_node_res_element(void *hnode, void *node_resource, + void *process_ctxt) +{ + struct node_res_object **node_res_obj = + (struct node_res_object **)node_resource; + struct process_context *ctxt = (struct process_context *)process_ctxt; + int retval; + + *node_res_obj = kzalloc(sizeof(struct node_res_object), GFP_KERNEL); + if (!*node_res_obj) + return -ENOMEM; + + (*node_res_obj)->node = hnode; + retval = idr_alloc(ctxt->node_id, *node_res_obj, 0, 0, GFP_KERNEL); + if (retval >= 0) { + (*node_res_obj)->id = retval; + return 0; + } + + kfree(*node_res_obj); + + if (retval == -ENOSPC) { + pr_err("%s: FAILED, IDR is FULL\n", __func__); + return -EFAULT; + } else { + pr_err("%s: OUT OF MEMORY\n", __func__); + return -ENOMEM; + } +} + +/* Release all Node resources and its context + * Actual Node De-Allocation */ +static int drv_proc_free_node_res(int id, void *p, void *data) +{ + struct process_context *ctxt = data; + int status; + struct node_res_object *node_res_obj = p; + u32 node_state; + + if (node_res_obj->node_allocated) { + node_state = node_get_state(node_res_obj->node); + if (node_state <= NODE_DELETING) { + if ((node_state == NODE_RUNNING) || + (node_state == NODE_PAUSED) || + (node_state == NODE_TERMINATING)) + node_terminate + (node_res_obj->node, &status); + + node_delete(node_res_obj, ctxt); + } + } + + return 0; +} + +/* Release all Mapped and Reserved DMM resources */ +int drv_remove_all_dmm_res_elements(void *process_ctxt) +{ + struct process_context *ctxt = (struct process_context *)process_ctxt; + int status = 0; + struct dmm_map_object *temp_map, *map_obj; + struct dmm_rsv_object *temp_rsv, *rsv_obj; + + /* Free DMM mapped memory resources */ + list_for_each_entry_safe(map_obj, temp_map, &ctxt->dmm_map_list, link) { + status = proc_un_map(ctxt->processor, + (void *)map_obj->dsp_addr, ctxt); + if (status) + pr_err("%s: proc_un_map failed!" + " status = 0x%xn", __func__, status); + } + + /* Free DMM reserved memory resources */ + list_for_each_entry_safe(rsv_obj, temp_rsv, &ctxt->dmm_rsv_list, link) { + status = proc_un_reserve_memory(ctxt->processor, (void *) + rsv_obj->dsp_reserved_addr, + ctxt); + if (status) + pr_err("%s: proc_un_reserve_memory failed!" + " status = 0x%xn", __func__, status); + } + return status; +} + +/* Update Node allocation status */ +void drv_proc_node_update_status(void *node_resource, s32 status) +{ + struct node_res_object *node_res_obj = + (struct node_res_object *)node_resource; + node_res_obj->node_allocated = status; +} + +/* Update Node Heap status */ +void drv_proc_node_update_heap_status(void *node_resource, s32 status) +{ + struct node_res_object *node_res_obj = + (struct node_res_object *)node_resource; + node_res_obj->heap_allocated = status; +} + +/* Release all Node resources and its context +* This is called from .bridge_release. + */ +int drv_remove_all_node_res_elements(void *process_ctxt) +{ + struct process_context *ctxt = process_ctxt; + + idr_for_each(ctxt->node_id, drv_proc_free_node_res, ctxt); + idr_destroy(ctxt->node_id); + + return 0; +} + +/* Allocate the STRM resource element +* This is called after the actual resource is allocated + */ +int drv_proc_insert_strm_res_element(void *stream_obj, + void *strm_res, void *process_ctxt) +{ + struct strm_res_object **pstrm_res = + (struct strm_res_object **)strm_res; + struct process_context *ctxt = (struct process_context *)process_ctxt; + int retval; + + *pstrm_res = kzalloc(sizeof(struct strm_res_object), GFP_KERNEL); + if (*pstrm_res == NULL) + return -EFAULT; + + (*pstrm_res)->stream = stream_obj; + retval = idr_alloc(ctxt->stream_id, *pstrm_res, 0, 0, GFP_KERNEL); + if (retval >= 0) { + (*pstrm_res)->id = retval; + return 0; + } + + if (retval == -ENOSPC) { + pr_err("%s: FAILED, IDR is FULL\n", __func__); + return -EPERM; + } else { + pr_err("%s: OUT OF MEMORY\n", __func__); + return -ENOMEM; + } +} + +static int drv_proc_free_strm_res(int id, void *p, void *process_ctxt) +{ + struct process_context *ctxt = process_ctxt; + struct strm_res_object *strm_res = p; + struct stream_info strm_info; + struct dsp_streaminfo user; + u8 **ap_buffer = NULL; + u8 *buf_ptr; + u32 ul_bytes; + u32 dw_arg; + s32 ul_buf_size; + + if (strm_res->num_bufs) { + ap_buffer = kmalloc((strm_res->num_bufs * + sizeof(u8 *)), GFP_KERNEL); + if (ap_buffer) { + strm_free_buffer(strm_res, + ap_buffer, + strm_res->num_bufs, + ctxt); + kfree(ap_buffer); + } + } + strm_info.user_strm = &user; + user.number_bufs_in_stream = 0; + strm_get_info(strm_res->stream, &strm_info, sizeof(strm_info)); + while (user.number_bufs_in_stream--) + strm_reclaim(strm_res->stream, &buf_ptr, &ul_bytes, + (u32 *) &ul_buf_size, &dw_arg); + strm_close(strm_res, ctxt); + return 0; +} + +/* Release all Stream resources and its context +* This is called from .bridge_release. + */ +int drv_remove_all_strm_res_elements(void *process_ctxt) +{ + struct process_context *ctxt = process_ctxt; + + idr_for_each(ctxt->stream_id, drv_proc_free_strm_res, ctxt); + idr_destroy(ctxt->stream_id); + + return 0; +} + +/* Updating the stream resource element */ +int drv_proc_update_strm_res(u32 num_bufs, void *strm_resources) +{ + int status = 0; + struct strm_res_object **strm_res = + (struct strm_res_object **)strm_resources; + + (*strm_res)->num_bufs = num_bufs; + return status; +} + +/* GPP PROCESS CLEANUP CODE END */ + +/* + * ======== = drv_create ======== = + * Purpose: + * DRV Object gets created only once during Driver Loading. + */ +int drv_create(struct drv_object **drv_obj) +{ + int status = 0; + struct drv_object *pdrv_object = NULL; + struct drv_data *drv_datap = dev_get_drvdata(bridge); + + pdrv_object = kzalloc(sizeof(struct drv_object), GFP_KERNEL); + if (pdrv_object) { + /* Create and Initialize List of device objects */ + INIT_LIST_HEAD(&pdrv_object->dev_list); + INIT_LIST_HEAD(&pdrv_object->dev_node_string); + } else { + status = -ENOMEM; + } + /* Store the DRV Object in the driver data */ + if (!status) { + if (drv_datap) { + drv_datap->drv_object = (void *)pdrv_object; + } else { + status = -EPERM; + pr_err("%s: Failed to store DRV object\n", __func__); + } + } + + if (!status) { + *drv_obj = pdrv_object; + } else { + /* Free the DRV Object */ + kfree(pdrv_object); + } + + return status; +} + +/* + * ======== = drv_destroy ======== = + * purpose: + * Invoked during bridge de-initialization + */ +int drv_destroy(struct drv_object *driver_obj) +{ + int status = 0; + struct drv_object *pdrv_object = (struct drv_object *)driver_obj; + struct drv_data *drv_datap = dev_get_drvdata(bridge); + + kfree(pdrv_object); + /* Update the DRV Object in the driver data */ + if (drv_datap) { + drv_datap->drv_object = NULL; + } else { + status = -EPERM; + pr_err("%s: Failed to store DRV object\n", __func__); + } + + return status; +} + +/* + * ======== drv_get_dev_object ======== + * Purpose: + * Given a index, returns a handle to DevObject from the list. + */ +int drv_get_dev_object(u32 index, struct drv_object *hdrv_obj, + struct dev_object **device_obj) +{ + int status = 0; + struct dev_object *dev_obj; + u32 i; + + dev_obj = (struct dev_object *)drv_get_first_dev_object(); + for (i = 0; i < index; i++) { + dev_obj = + (struct dev_object *)drv_get_next_dev_object((u32) dev_obj); + } + if (dev_obj) { + *device_obj = (struct dev_object *)dev_obj; + } else { + *device_obj = NULL; + status = -EPERM; + } + + return status; +} + +/* + * ======== drv_get_first_dev_object ======== + * Purpose: + * Retrieve the first Device Object handle from an internal linked list of + * of DEV_OBJECTs maintained by DRV. + */ +u32 drv_get_first_dev_object(void) +{ + u32 dw_dev_object = 0; + struct drv_object *pdrv_obj; + struct drv_data *drv_datap = dev_get_drvdata(bridge); + + if (drv_datap && drv_datap->drv_object) { + pdrv_obj = drv_datap->drv_object; + if (!list_empty(&pdrv_obj->dev_list)) + dw_dev_object = (u32) pdrv_obj->dev_list.next; + } else { + pr_err("%s: Failed to retrieve the object handle\n", __func__); + } + + return dw_dev_object; +} + +/* + * ======== DRV_GetFirstDevNodeString ======== + * Purpose: + * Retrieve the first Device Extension from an internal linked list of + * of Pointer to dev_node Strings maintained by DRV. + */ +u32 drv_get_first_dev_extension(void) +{ + u32 dw_dev_extension = 0; + struct drv_object *pdrv_obj; + struct drv_data *drv_datap = dev_get_drvdata(bridge); + + if (drv_datap && drv_datap->drv_object) { + pdrv_obj = drv_datap->drv_object; + if (!list_empty(&pdrv_obj->dev_node_string)) { + dw_dev_extension = + (u32) pdrv_obj->dev_node_string.next; + } + } else { + pr_err("%s: Failed to retrieve the object handle\n", __func__); + } + + return dw_dev_extension; +} + +/* + * ======== drv_get_next_dev_object ======== + * Purpose: + * Retrieve the next Device Object handle from an internal linked list of + * of DEV_OBJECTs maintained by DRV, after having previously called + * drv_get_first_dev_object() and zero or more DRV_GetNext. + */ +u32 drv_get_next_dev_object(u32 hdev_obj) +{ + u32 dw_next_dev_object = 0; + struct drv_object *pdrv_obj; + struct drv_data *drv_datap = dev_get_drvdata(bridge); + struct list_head *curr; + + if (drv_datap && drv_datap->drv_object) { + pdrv_obj = drv_datap->drv_object; + if (!list_empty(&pdrv_obj->dev_list)) { + curr = (struct list_head *)hdev_obj; + if (list_is_last(curr, &pdrv_obj->dev_list)) + return 0; + dw_next_dev_object = (u32) curr->next; + } + } else { + pr_err("%s: Failed to retrieve the object handle\n", __func__); + } + + return dw_next_dev_object; +} + +/* + * ======== drv_get_next_dev_extension ======== + * Purpose: + * Retrieve the next Device Extension from an internal linked list of + * of pointer to DevNodeString maintained by DRV, after having previously + * called drv_get_first_dev_extension() and zero or more + * drv_get_next_dev_extension(). + */ +u32 drv_get_next_dev_extension(u32 dev_extension) +{ + u32 dw_dev_extension = 0; + struct drv_object *pdrv_obj; + struct drv_data *drv_datap = dev_get_drvdata(bridge); + struct list_head *curr; + + if (drv_datap && drv_datap->drv_object) { + pdrv_obj = drv_datap->drv_object; + if (!list_empty(&pdrv_obj->dev_node_string)) { + curr = (struct list_head *)dev_extension; + if (list_is_last(curr, &pdrv_obj->dev_node_string)) + return 0; + dw_dev_extension = (u32) curr->next; + } + } else { + pr_err("%s: Failed to retrieve the object handle\n", __func__); + } + + return dw_dev_extension; +} + +/* + * ======== drv_insert_dev_object ======== + * Purpose: + * Insert a DevObject into the list of Manager object. + */ +int drv_insert_dev_object(struct drv_object *driver_obj, + struct dev_object *hdev_obj) +{ + struct drv_object *pdrv_object = (struct drv_object *)driver_obj; + + list_add_tail((struct list_head *)hdev_obj, &pdrv_object->dev_list); + + return 0; +} + +/* + * ======== drv_remove_dev_object ======== + * Purpose: + * Search for and remove a DeviceObject from the given list of DRV + * objects. + */ +int drv_remove_dev_object(struct drv_object *driver_obj, + struct dev_object *hdev_obj) +{ + int status = -EPERM; + struct drv_object *pdrv_object = (struct drv_object *)driver_obj; + struct list_head *cur_elem; + + /* Search list for p_proc_object: */ + list_for_each(cur_elem, &pdrv_object->dev_list) { + /* If found, remove it. */ + if ((struct dev_object *)cur_elem == hdev_obj) { + list_del(cur_elem); + status = 0; + break; + } + } + + return status; +} + +/* + * ======== drv_request_resources ======== + * Purpose: + * Requests resources from the OS. + */ +int drv_request_resources(u32 dw_context, u32 *dev_node_strg) +{ + int status = 0; + struct drv_object *pdrv_object; + struct drv_ext *pszdev_node; + struct drv_data *drv_datap = dev_get_drvdata(bridge); + + /* + * Allocate memory to hold the string. This will live until + * it is freed in the Release resources. Update the driver object + * list. + */ + + if (!drv_datap || !drv_datap->drv_object) + status = -ENODATA; + else + pdrv_object = drv_datap->drv_object; + + if (!status) { + pszdev_node = kzalloc(sizeof(struct drv_ext), GFP_KERNEL); + if (pszdev_node) { + strncpy(pszdev_node->sz_string, + (char *)dw_context, MAXREGPATHLENGTH - 1); + pszdev_node->sz_string[MAXREGPATHLENGTH - 1] = '\0'; + /* Update the Driver Object List */ + *dev_node_strg = (u32) pszdev_node->sz_string; + list_add_tail(&pszdev_node->link, + &pdrv_object->dev_node_string); + } else { + status = -ENOMEM; + *dev_node_strg = 0; + } + } else { + dev_dbg(bridge, "%s: Failed to get Driver Object from Registry", + __func__); + *dev_node_strg = 0; + } + + return status; +} + +/* + * ======== drv_release_resources ======== + * Purpose: + * Releases resources from the OS. + */ +int drv_release_resources(u32 dw_context, struct drv_object *hdrv_obj) +{ + int status = 0; + struct drv_ext *pszdev_node; + + /* + * Irrespective of the status go ahead and clean it + * The following will over write the status. + */ + for (pszdev_node = (struct drv_ext *)drv_get_first_dev_extension(); + pszdev_node != NULL; pszdev_node = (struct drv_ext *) + drv_get_next_dev_extension((u32) pszdev_node)) { + if ((u32) pszdev_node == dw_context) { + /* Found it */ + /* Delete from the Driver object list */ + list_del(&pszdev_node->link); + kfree(pszdev_node); + break; + } + } + return status; +} + +/* + * ======== request_bridge_resources ======== + * Purpose: + * Reserves shared memory for bridge. + */ +static int request_bridge_resources(struct cfg_hostres *res) +{ + struct cfg_hostres *host_res = res; + + /* num_mem_windows must not be more than CFG_MAXMEMREGISTERS */ + host_res->num_mem_windows = 2; + + /* First window is for DSP internal memory */ + dev_dbg(bridge, "mem_base[0] 0x%x\n", host_res->mem_base[0]); + dev_dbg(bridge, "mem_base[3] 0x%x\n", host_res->mem_base[3]); + dev_dbg(bridge, "dmmu_base %p\n", host_res->dmmu_base); + + /* for 24xx base port is not mapping the mamory for DSP + * internal memory TODO Do a ioremap here */ + /* Second window is for DSP external memory shared with MPU */ + + /* These are hard-coded values */ + host_res->birq_registers = 0; + host_res->birq_attrib = 0; + host_res->offset_for_monitor = 0; + host_res->chnl_offset = 0; + /* CHNL_MAXCHANNELS */ + host_res->num_chnls = CHNL_MAXCHANNELS; + host_res->chnl_buf_size = 0x400; + + return 0; +} + +/* + * ======== drv_request_bridge_res_dsp ======== + * Purpose: + * Reserves shared memory for bridge. + */ +int drv_request_bridge_res_dsp(void **phost_resources) +{ + int status = 0; + struct cfg_hostres *host_res; + u32 dw_buff_size; + u32 dma_addr; + u32 shm_size; + struct drv_data *drv_datap = dev_get_drvdata(bridge); + + dw_buff_size = sizeof(struct cfg_hostres); + + host_res = kzalloc(dw_buff_size, GFP_KERNEL); + + if (host_res != NULL) { + request_bridge_resources(host_res); + /* num_mem_windows must not be more than CFG_MAXMEMREGISTERS */ + host_res->num_mem_windows = 4; + + host_res->mem_base[0] = 0; + host_res->mem_base[2] = (u32) ioremap(OMAP_DSP_MEM1_BASE, + OMAP_DSP_MEM1_SIZE); + host_res->mem_base[3] = (u32) ioremap(OMAP_DSP_MEM2_BASE, + OMAP_DSP_MEM2_SIZE); + host_res->mem_base[4] = (u32) ioremap(OMAP_DSP_MEM3_BASE, + OMAP_DSP_MEM3_SIZE); + host_res->per_base = ioremap(OMAP_PER_CM_BASE, + OMAP_PER_CM_SIZE); + host_res->per_pm_base = ioremap(OMAP_PER_PRM_BASE, + OMAP_PER_PRM_SIZE); + host_res->core_pm_base = ioremap(OMAP_CORE_PRM_BASE, + OMAP_CORE_PRM_SIZE); + host_res->dmmu_base = ioremap(OMAP_DMMU_BASE, + OMAP_DMMU_SIZE); + + dev_dbg(bridge, "mem_base[0] 0x%x\n", + host_res->mem_base[0]); + dev_dbg(bridge, "mem_base[1] 0x%x\n", + host_res->mem_base[1]); + dev_dbg(bridge, "mem_base[2] 0x%x\n", + host_res->mem_base[2]); + dev_dbg(bridge, "mem_base[3] 0x%x\n", + host_res->mem_base[3]); + dev_dbg(bridge, "mem_base[4] 0x%x\n", + host_res->mem_base[4]); + dev_dbg(bridge, "dmmu_base %p\n", host_res->dmmu_base); + + shm_size = drv_datap->shm_size; + if (shm_size >= 0x10000) { + /* Allocate Physically contiguous, + * non-cacheable memory */ + host_res->mem_base[1] = + (u32) mem_alloc_phys_mem(shm_size, 0x100000, + &dma_addr); + if (host_res->mem_base[1] == 0) { + status = -ENOMEM; + pr_err("shm reservation Failed\n"); + } else { + host_res->mem_length[1] = shm_size; + host_res->mem_phys[1] = dma_addr; + + dev_dbg(bridge, "%s: Bridge shm address 0x%x " + "dma_addr %x size %x\n", __func__, + host_res->mem_base[1], + dma_addr, shm_size); + } + } + if (!status) { + /* These are hard-coded values */ + host_res->birq_registers = 0; + host_res->birq_attrib = 0; + host_res->offset_for_monitor = 0; + host_res->chnl_offset = 0; + /* CHNL_MAXCHANNELS */ + host_res->num_chnls = CHNL_MAXCHANNELS; + host_res->chnl_buf_size = 0x400; + dw_buff_size = sizeof(struct cfg_hostres); + } + *phost_resources = host_res; + } + /* End Mem alloc */ + return status; +} + +void mem_ext_phys_pool_init(u32 pool_phys_base, u32 pool_size) +{ + u32 pool_virt_base; + + /* get the virtual address for the physical memory pool passed */ + pool_virt_base = (u32) ioremap(pool_phys_base, pool_size); + + if ((void **)pool_virt_base == NULL) { + pr_err("%s: external physical memory map failed\n", __func__); + ext_phys_mem_pool_enabled = false; + } else { + ext_mem_pool.phys_mem_base = pool_phys_base; + ext_mem_pool.phys_mem_size = pool_size; + ext_mem_pool.virt_mem_base = pool_virt_base; + ext_mem_pool.next_phys_alloc_ptr = pool_phys_base; + ext_phys_mem_pool_enabled = true; + } +} + +void mem_ext_phys_pool_release(void) +{ + if (ext_phys_mem_pool_enabled) { + iounmap((void *)(ext_mem_pool.virt_mem_base)); + ext_phys_mem_pool_enabled = false; + } +} + +/* + * ======== mem_ext_phys_mem_alloc ======== + * Purpose: + * Allocate physically contiguous, uncached memory from external memory pool + */ + +static void *mem_ext_phys_mem_alloc(u32 bytes, u32 align, u32 * phys_addr) +{ + u32 new_alloc_ptr; + u32 offset; + u32 virt_addr; + + if (align == 0) + align = 1; + + if (bytes > ((ext_mem_pool.phys_mem_base + ext_mem_pool.phys_mem_size) + - ext_mem_pool.next_phys_alloc_ptr)) { + phys_addr = NULL; + return NULL; + } else { + offset = (ext_mem_pool.next_phys_alloc_ptr & (align - 1)); + if (offset == 0) + new_alloc_ptr = ext_mem_pool.next_phys_alloc_ptr; + else + new_alloc_ptr = (ext_mem_pool.next_phys_alloc_ptr) + + (align - offset); + if ((new_alloc_ptr + bytes) <= + (ext_mem_pool.phys_mem_base + ext_mem_pool.phys_mem_size)) { + /* we can allocate */ + *phys_addr = new_alloc_ptr; + ext_mem_pool.next_phys_alloc_ptr = + new_alloc_ptr + bytes; + virt_addr = + ext_mem_pool.virt_mem_base + (new_alloc_ptr - + ext_mem_pool. + phys_mem_base); + return (void *)virt_addr; + } else { + *phys_addr = 0; + return NULL; + } + } +} + +/* + * ======== mem_alloc_phys_mem ======== + * Purpose: + * Allocate physically contiguous, uncached memory + */ +void *mem_alloc_phys_mem(u32 byte_size, u32 align_mask, + u32 *physical_address) +{ + void *va_mem = NULL; + dma_addr_t pa_mem; + + if (byte_size > 0) { + if (ext_phys_mem_pool_enabled) { + va_mem = mem_ext_phys_mem_alloc(byte_size, align_mask, + (u32 *) &pa_mem); + } else + va_mem = dma_alloc_coherent(NULL, byte_size, &pa_mem, + GFP_KERNEL); + if (va_mem == NULL) + *physical_address = 0; + else + *physical_address = pa_mem; + } + return va_mem; +} + +/* + * ======== mem_free_phys_mem ======== + * Purpose: + * Free the given block of physically contiguous memory. + */ +void mem_free_phys_mem(void *virtual_address, u32 physical_address, + u32 byte_size) +{ + if (!ext_phys_mem_pool_enabled) + dma_free_coherent(NULL, byte_size, virtual_address, + physical_address); +} |