![Víctor Manuel Jáquez Leal](/assets/img/avatar_default.png)
The drv module has a drv_init() and a drv_exit() whose only purpose is to keep a reference counting which is not used at all. This patch removes these functions and the reference count variable. There is no functional changes. Signed-off-by: Víctor Manuel Jáquez Leal <vjaquez@igalia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
469 lines
14 KiB
C
469 lines
14 KiB
C
/*
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* drv.h
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*
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* DSP-BIOS Bridge driver support functions for TI OMAP processors.
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*
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* DRV Resource allocation module. Driver Object gets Created
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* at the time of Loading. It holds the List of Device Objects
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* in the system.
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*
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* Copyright (C) 2005-2006 Texas Instruments, Inc.
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*
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* This package is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#ifndef DRV_
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#define DRV_
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#include <dspbridge/devdefs.h>
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#include <linux/idr.h>
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/* Bridge Driver Object */
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struct drv_object;
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/* Provide the DSP Internal memory windows that can be accessed from L3 address
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* space */
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#define OMAP_GEM_BASE 0x107F8000
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#define OMAP_DSP_SIZE 0x00720000
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/* MEM1 is L2 RAM + L2 Cache space */
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#define OMAP_DSP_MEM1_BASE 0x5C7F8000
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#define OMAP_DSP_MEM1_SIZE 0x18000
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/* MEM2 is L1P RAM/CACHE space */
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#define OMAP_DSP_MEM2_BASE 0x5CE00000
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#define OMAP_DSP_MEM2_SIZE 0x8000
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/* MEM3 is L1D RAM/CACHE space */
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#define OMAP_DSP_MEM3_BASE 0x5CF04000
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#define OMAP_DSP_MEM3_SIZE 0x14000
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#define OMAP_PER_CM_BASE 0x48005000
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#define OMAP_PER_CM_SIZE 0x1000
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#define OMAP_PER_PRM_BASE 0x48307000
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#define OMAP_PER_PRM_SIZE 0x1000
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#define OMAP_CORE_PRM_BASE 0x48306A00
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#define OMAP_CORE_PRM_SIZE 0x1000
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#define OMAP_DMMU_BASE 0x5D000000
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#define OMAP_DMMU_SIZE 0x1000
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/* GPP PROCESS CLEANUP Data structures */
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/* New structure (member of process context) abstracts NODE resource info */
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struct node_res_object {
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void *node;
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s32 node_allocated; /* Node status */
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s32 heap_allocated; /* Heap status */
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s32 streams_allocated; /* Streams status */
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int id;
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};
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/* used to cache dma mapping information */
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struct bridge_dma_map_info {
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/* direction of DMA in action, or DMA_NONE */
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enum dma_data_direction dir;
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/* number of elements requested by us */
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int num_pages;
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/* number of elements returned from dma_map_sg */
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int sg_num;
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/* list of buffers used in this DMA action */
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struct scatterlist *sg;
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};
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/* Used for DMM mapped memory accounting */
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struct dmm_map_object {
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struct list_head link;
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u32 dsp_addr;
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u32 mpu_addr;
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u32 size;
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u32 num_usr_pgs;
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struct page **pages;
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struct bridge_dma_map_info dma_info;
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};
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/* Used for DMM reserved memory accounting */
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struct dmm_rsv_object {
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struct list_head link;
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u32 dsp_reserved_addr;
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};
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/* New structure (member of process context) abstracts stream resource info */
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struct strm_res_object {
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s32 stream_allocated; /* Stream status */
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void *stream;
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u32 num_bufs;
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u32 dir;
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int id;
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};
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/* Overall Bridge process resource usage state */
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enum gpp_proc_res_state {
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PROC_RES_ALLOCATED,
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PROC_RES_FREED
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};
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/* Bridge Data */
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struct drv_data {
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char *base_img;
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s32 shm_size;
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int tc_wordswapon;
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void *drv_object;
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void *dev_object;
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void *mgr_object;
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};
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/* Process Context */
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struct process_context {
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/* Process State */
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enum gpp_proc_res_state res_state;
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/* Handle to Processor */
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void *processor;
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/* DSP Node resources */
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struct idr *node_id;
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/* DMM mapped memory resources */
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struct list_head dmm_map_list;
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spinlock_t dmm_map_lock;
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/* DMM reserved memory resources */
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struct list_head dmm_rsv_list;
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spinlock_t dmm_rsv_lock;
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/* Stream resources */
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struct idr *stream_id;
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};
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/*
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* ======== drv_create ========
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* Purpose:
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* Creates the Driver Object. This is done during the driver loading.
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* There is only one Driver Object in the DSP/BIOS Bridge.
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* Parameters:
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* drv_obj: Location to store created DRV Object handle.
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* Returns:
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* 0: Success
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* -ENOMEM: Failed in Memory allocation
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* -EPERM: General Failure
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* Requires:
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* DRV Initialized (refs > 0 )
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* drv_obj != NULL.
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* Ensures:
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* 0: - *drv_obj is a valid DRV interface to the device.
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* - List of DevObject Created and Initialized.
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* - List of dev_node String created and initialized.
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* - Registry is updated with the DRV Object.
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* !0: DRV Object not created
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* Details:
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* There is one Driver Object for the Driver representing
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* the driver itself. It contains the list of device
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* Objects and the list of Device Extensions in the system.
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* Also it can hold other necessary
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* information in its storage area.
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*/
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extern int drv_create(struct drv_object **drv_obj);
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/*
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* ======== drv_destroy ========
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* Purpose:
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* destroys the Dev Object list, DrvExt list
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* and destroy the DRV object
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* Called upon driver unLoading.or unsuccessful loading of the driver.
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* Parameters:
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* driver_obj: Handle to Driver object .
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* Returns:
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* 0: Success.
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* -EPERM: Failed to destroy DRV Object
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* Requires:
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* DRV Initialized (cRegs > 0 )
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* hdrv_obj is not NULL and a valid DRV handle .
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* List of DevObject is Empty.
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* List of DrvExt is Empty
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* Ensures:
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* 0: - DRV Object destroyed and hdrv_obj is not a valid
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* DRV handle.
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* - Registry is updated with "0" as the DRV Object.
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*/
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extern int drv_destroy(struct drv_object *driver_obj);
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/*
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* ======== drv_get_first_dev_object ========
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* Purpose:
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* Returns the Ptr to the FirstDev Object in the List
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* Parameters:
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* Requires:
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* DRV Initialized
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* Returns:
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* dw_dev_object: Ptr to the First Dev Object as a u32
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* 0 if it fails to retrieve the First Dev Object
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* Ensures:
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*/
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extern u32 drv_get_first_dev_object(void);
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/*
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* ======== drv_get_first_dev_extension ========
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* Purpose:
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* Returns the Ptr to the First Device Extension in the List
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* Parameters:
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* Requires:
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* DRV Initialized
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* Returns:
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* dw_dev_extension: Ptr to the First Device Extension as a u32
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* 0: Failed to Get the Device Extension
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* Ensures:
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*/
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extern u32 drv_get_first_dev_extension(void);
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/*
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* ======== drv_get_dev_object ========
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* Purpose:
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* Given a index, returns a handle to DevObject from the list
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* Parameters:
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* hdrv_obj: Handle to the Manager
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* device_obj: Location to store the Dev Handle
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* Requires:
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* DRV Initialized
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* index >= 0
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* hdrv_obj is not NULL and Valid DRV Object
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* device_obj is not NULL
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* Device Object List not Empty
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* Returns:
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* 0: Success
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* -EPERM: Failed to Get the Dev Object
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* Ensures:
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* 0: *device_obj != NULL
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* -EPERM: *device_obj = NULL
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*/
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extern int drv_get_dev_object(u32 index,
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struct drv_object *hdrv_obj,
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struct dev_object **device_obj);
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/*
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* ======== drv_get_next_dev_object ========
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* Purpose:
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* Returns the Ptr to the Next Device Object from the the List
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* Parameters:
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* hdev_obj: Handle to the Device Object
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* Requires:
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* DRV Initialized
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* hdev_obj != 0
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* Returns:
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* dw_dev_object: Ptr to the Next Dev Object as a u32
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* 0: If it fail to get the next Dev Object.
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* Ensures:
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*/
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extern u32 drv_get_next_dev_object(u32 hdev_obj);
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/*
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* ======== drv_get_next_dev_extension ========
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* Purpose:
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* Returns the Ptr to the Next Device Extension from the the List
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* Parameters:
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* dev_extension: Handle to the Device Extension
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* Requires:
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* DRV Initialized
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* dev_extension != 0.
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* Returns:
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* dw_dev_extension: Ptr to the Next Dev Extension
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* 0: If it fail to Get the next Dev Extension
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* Ensures:
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*/
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extern u32 drv_get_next_dev_extension(u32 dev_extension);
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/*
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* ======== drv_insert_dev_object ========
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* Purpose:
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* Insert a DeviceObject into the list of Driver object.
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* Parameters:
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* driver_obj: Handle to DrvObject
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* hdev_obj: Handle to DeviceObject to insert.
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* Returns:
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* 0: If successful.
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* -EPERM: General Failure:
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* Requires:
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* hdrv_obj != NULL and Valid DRV Handle.
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* hdev_obj != NULL.
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* Ensures:
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* 0: Device Object is inserted and the List is not empty.
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*/
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extern int drv_insert_dev_object(struct drv_object *driver_obj,
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struct dev_object *hdev_obj);
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/*
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* ======== drv_remove_dev_object ========
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* Purpose:
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* Search for and remove a Device object from the given list of Device Obj
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* objects.
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* Parameters:
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* driver_obj: Handle to DrvObject
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* hdev_obj: Handle to DevObject to Remove
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* Returns:
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* 0: Success.
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* -EPERM: Unable to find dev_obj.
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* Requires:
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* hdrv_obj != NULL and a Valid DRV Handle.
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* hdev_obj != NULL.
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* List exists and is not empty.
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* Ensures:
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* List either does not exist (NULL), or is not empty if it does exist.
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*/
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extern int drv_remove_dev_object(struct drv_object *driver_obj,
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struct dev_object *hdev_obj);
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/*
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* ======== drv_request_resources ========
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* Purpose:
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* Assigns the Resources or Releases them.
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* Parameters:
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* dw_context: Path to the driver Registry Key.
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* dev_node_strg: Ptr to dev_node String stored in the Device Ext.
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* Returns:
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* TRUE if success; FALSE otherwise.
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* Requires:
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* Ensures:
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* The Resources are assigned based on Bus type.
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* The hardware is initialized. Resource information is
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* gathered from the Registry(ISA, PCMCIA)or scanned(PCI)
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* Resource structure is stored in the registry which will be
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* later used by the CFG module.
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*/
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extern int drv_request_resources(u32 dw_context,
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u32 *dev_node_strg);
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/*
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* ======== drv_release_resources ========
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* Purpose:
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* Assigns the Resources or Releases them.
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* Parameters:
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* dw_context: Path to the driver Registry Key.
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* hdrv_obj: Handle to the Driver Object.
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* Returns:
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* TRUE if success; FALSE otherwise.
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* Requires:
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* Ensures:
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* The Resources are released based on Bus type.
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* Resource structure is deleted from the registry
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*/
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extern int drv_release_resources(u32 dw_context,
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struct drv_object *hdrv_obj);
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/**
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* drv_request_bridge_res_dsp() - Reserves shared memory for bridge.
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* @phost_resources: pointer to host resources.
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*/
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int drv_request_bridge_res_dsp(void **phost_resources);
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#ifdef CONFIG_TIDSPBRIDGE_RECOVERY
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void bridge_recover_schedule(void);
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#endif
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/*
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* ======== mem_ext_phys_pool_init ========
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* Purpose:
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* Uses the physical memory chunk passed for internal consistent memory
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* allocations.
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* physical address based on the page frame address.
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* Parameters:
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* pool_phys_base starting address of the physical memory pool.
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* pool_size size of the physical memory pool.
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* Returns:
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* none.
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* Requires:
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* - MEM initialized.
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* - valid physical address for the base and size > 0
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*/
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extern void mem_ext_phys_pool_init(u32 pool_phys_base, u32 pool_size);
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/*
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* ======== mem_ext_phys_pool_release ========
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*/
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extern void mem_ext_phys_pool_release(void);
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/* ======== mem_alloc_phys_mem ========
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* Purpose:
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* Allocate physically contiguous, uncached memory
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* Parameters:
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* byte_size: Number of bytes to allocate.
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* align_mask: Alignment Mask.
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* physical_address: Physical address of allocated memory.
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* Returns:
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* Pointer to a block of memory;
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* NULL if memory couldn't be allocated, or if byte_size == 0.
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* Requires:
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* MEM initialized.
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* Ensures:
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* The returned pointer, if not NULL, points to a valid memory block of
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* the size requested. Returned physical address refers to physical
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* location of memory.
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*/
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extern void *mem_alloc_phys_mem(u32 byte_size,
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u32 align_mask, u32 *physical_address);
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/*
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* ======== mem_free_phys_mem ========
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* Purpose:
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* Free the given block of physically contiguous memory.
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* Parameters:
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* virtual_address: Pointer to virtual memory region allocated
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* by mem_alloc_phys_mem().
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* physical_address: Pointer to physical memory region allocated
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* by mem_alloc_phys_mem().
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* byte_size: Size of the memory region allocated by mem_alloc_phys_mem().
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* Returns:
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* Requires:
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* MEM initialized.
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* virtual_address is a valid memory address returned by
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* mem_alloc_phys_mem()
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* Ensures:
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* virtual_address is no longer a valid pointer to memory.
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*/
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extern void mem_free_phys_mem(void *virtual_address,
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u32 physical_address, u32 byte_size);
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/*
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* ======== MEM_LINEAR_ADDRESS ========
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* Purpose:
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* Get the linear address corresponding to the given physical address.
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* Parameters:
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* phys_addr: Physical address to be mapped.
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* byte_size: Number of bytes in physical range to map.
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* Returns:
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* The corresponding linear address, or NULL if unsuccessful.
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* Requires:
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* MEM initialized.
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* Ensures:
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* Notes:
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* If valid linear address is returned, be sure to call
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* MEM_UNMAP_LINEAR_ADDRESS().
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*/
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#define MEM_LINEAR_ADDRESS(phy_addr, byte_size) phy_addr
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/*
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* ======== MEM_UNMAP_LINEAR_ADDRESS ========
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* Purpose:
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* Unmap the linear address mapped in MEM_LINEAR_ADDRESS.
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* Parameters:
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* base_addr: Ptr to mapped memory (as returned by MEM_LINEAR_ADDRESS()).
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* Returns:
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* Requires:
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* - MEM initialized.
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* - base_addr is a valid linear address mapped in MEM_LINEAR_ADDRESS.
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* Ensures:
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* - base_addr no longer points to a valid linear address.
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*/
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#define MEM_UNMAP_LINEAR_ADDRESS(base_addr) {}
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#endif /* DRV_ */
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