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![Omar Ramirez Luna](/assets/img/avatar_default.png)
There is no way to specify the value of iva_img and since this code is not being used, remove it. This analysis resulted from a report by Chen Gang <gang.chen@asianux.com>, mentioning that the existing code was wrongly specifying the size to be copied. Signed-off-by: Omar Ramirez Luna <omar.ramirez@copitl.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
628 lines
14 KiB
C
628 lines
14 KiB
C
/*
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* drv_interface.c
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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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* DSP/BIOS Bridge driver interface.
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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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#include <linux/platform_data/dsp-omap.h>
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#include <linux/types.h>
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#include <linux/platform_device.h>
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#include <linux/pm.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/init.h>
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#include <linux/moduleparam.h>
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#include <linux/cdev.h>
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/* ----------------------------------- DSP/BIOS Bridge */
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#include <dspbridge/dbdefs.h>
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/* ----------------------------------- OS Adaptation Layer */
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#include <dspbridge/clk.h>
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/* ----------------------------------- Platform Manager */
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#include <dspbridge/dspapi.h>
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#include <dspbridge/dspdrv.h>
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/* ----------------------------------- Resource Manager */
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#include <dspbridge/pwr.h>
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#include <dspbridge/resourcecleanup.h>
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#include <dspbridge/proc.h>
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#include <dspbridge/dev.h>
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#ifdef CONFIG_TIDSPBRIDGE_DVFS
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#include <mach-omap2/omap3-opp.h>
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#endif
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/* ----------------------------------- Globals */
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#define DSPBRIDGE_VERSION "0.3"
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s32 dsp_debug;
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struct platform_device *omap_dspbridge_dev;
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struct device *bridge;
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/* This is a test variable used by Bridge to test different sleep states */
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s32 dsp_test_sleepstate;
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static struct cdev bridge_cdev;
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static struct class *bridge_class;
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static u32 driver_context;
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static s32 driver_major;
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static char *base_img;
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static s32 shm_size = 0x500000; /* 5 MB */
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static int tc_wordswapon; /* Default value is always false */
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#ifdef CONFIG_TIDSPBRIDGE_RECOVERY
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#define REC_TIMEOUT 5000 /*recovery timeout in msecs */
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static atomic_t bridge_cref; /* number of bridge open handles */
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static struct workqueue_struct *bridge_rec_queue;
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static struct work_struct bridge_recovery_work;
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static DECLARE_COMPLETION(bridge_comp);
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static DECLARE_COMPLETION(bridge_open_comp);
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static bool recover;
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#endif
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#ifdef CONFIG_PM
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struct omap34_xx_bridge_suspend_data {
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int suspended;
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wait_queue_head_t suspend_wq;
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};
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static struct omap34_xx_bridge_suspend_data bridge_suspend_data;
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static int omap34_xxbridge_suspend_lockout(struct omap34_xx_bridge_suspend_data
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*s, struct file *f)
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{
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if ((s)->suspended) {
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if ((f)->f_flags & O_NONBLOCK)
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return -EPERM;
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wait_event_interruptible((s)->suspend_wq, (s)->suspended == 0);
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}
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return 0;
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}
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#endif
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module_param(dsp_debug, int, 0);
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MODULE_PARM_DESC(dsp_debug, "Wait after loading DSP image. default = false");
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module_param(dsp_test_sleepstate, int, 0);
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MODULE_PARM_DESC(dsp_test_sleepstate, "DSP Sleep state = 0");
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module_param(base_img, charp, 0);
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MODULE_PARM_DESC(base_img, "DSP base image, default = NULL");
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module_param(shm_size, int, 0);
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MODULE_PARM_DESC(shm_size, "shm size, default = 4 MB, minimum = 64 KB");
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module_param(tc_wordswapon, int, 0);
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MODULE_PARM_DESC(tc_wordswapon, "TC Word Swap Option. default = 0");
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MODULE_AUTHOR("Texas Instruments");
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MODULE_LICENSE("GPL");
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MODULE_VERSION(DSPBRIDGE_VERSION);
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/*
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* This function is called when an application opens handle to the
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* bridge driver.
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*/
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static int bridge_open(struct inode *ip, struct file *filp)
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{
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int status = 0;
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struct process_context *pr_ctxt = NULL;
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/*
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* Allocate a new process context and insert it into global
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* process context list.
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*/
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#ifdef CONFIG_TIDSPBRIDGE_RECOVERY
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if (recover) {
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if (filp->f_flags & O_NONBLOCK ||
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wait_for_completion_interruptible(&bridge_open_comp))
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return -EBUSY;
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}
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#endif
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pr_ctxt = kzalloc(sizeof(struct process_context), GFP_KERNEL);
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if (!pr_ctxt)
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return -ENOMEM;
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pr_ctxt->res_state = PROC_RES_ALLOCATED;
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spin_lock_init(&pr_ctxt->dmm_map_lock);
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INIT_LIST_HEAD(&pr_ctxt->dmm_map_list);
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spin_lock_init(&pr_ctxt->dmm_rsv_lock);
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INIT_LIST_HEAD(&pr_ctxt->dmm_rsv_list);
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pr_ctxt->node_id = kzalloc(sizeof(struct idr), GFP_KERNEL);
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if (!pr_ctxt->node_id) {
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status = -ENOMEM;
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goto err1;
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}
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idr_init(pr_ctxt->node_id);
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pr_ctxt->stream_id = kzalloc(sizeof(struct idr), GFP_KERNEL);
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if (!pr_ctxt->stream_id) {
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status = -ENOMEM;
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goto err2;
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}
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idr_init(pr_ctxt->stream_id);
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filp->private_data = pr_ctxt;
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#ifdef CONFIG_TIDSPBRIDGE_RECOVERY
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atomic_inc(&bridge_cref);
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#endif
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return 0;
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err2:
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kfree(pr_ctxt->node_id);
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err1:
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kfree(pr_ctxt);
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return status;
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}
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/*
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* This function is called when an application closes handle to the bridge
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* driver.
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*/
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static int bridge_release(struct inode *ip, struct file *filp)
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{
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int status = 0;
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struct process_context *pr_ctxt;
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if (!filp->private_data) {
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status = -EIO;
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goto err;
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}
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pr_ctxt = filp->private_data;
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flush_signals(current);
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drv_remove_all_resources(pr_ctxt);
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proc_detach(pr_ctxt);
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kfree(pr_ctxt->node_id);
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kfree(pr_ctxt->stream_id);
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kfree(pr_ctxt);
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filp->private_data = NULL;
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err:
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#ifdef CONFIG_TIDSPBRIDGE_RECOVERY
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if (!atomic_dec_return(&bridge_cref))
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complete(&bridge_comp);
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#endif
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return status;
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}
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/* This function provides IO interface to the bridge driver. */
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static long bridge_ioctl(struct file *filp, unsigned int code,
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unsigned long args)
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{
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int status;
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u32 retval = 0;
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union trapped_args buf_in;
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#ifdef CONFIG_TIDSPBRIDGE_RECOVERY
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if (recover) {
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status = -EIO;
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goto err;
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}
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#endif
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#ifdef CONFIG_PM
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status = omap34_xxbridge_suspend_lockout(&bridge_suspend_data, filp);
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if (status != 0)
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return status;
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#endif
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if (!filp->private_data) {
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status = -EIO;
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goto err;
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}
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status = copy_from_user(&buf_in, (union trapped_args *)args,
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sizeof(union trapped_args));
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if (!status) {
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status = api_call_dev_ioctl(code, &buf_in, &retval,
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filp->private_data);
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if (!status) {
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status = retval;
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} else {
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dev_dbg(bridge, "%s: IOCTL Failed, code: 0x%x "
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"status 0x%x\n", __func__, code, status);
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status = -1;
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}
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}
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err:
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return status;
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}
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/* This function maps kernel space memory to user space memory. */
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static int bridge_mmap(struct file *filp, struct vm_area_struct *vma)
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{
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u32 status;
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/* VM_IO | VM_DONTEXPAND | VM_DONTDUMP are set by remap_pfn_range() */
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vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
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dev_dbg(bridge, "%s: vm filp %p start %lx end %lx page_prot %ulx "
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"flags %lx\n", __func__, filp,
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vma->vm_start, vma->vm_end, vma->vm_page_prot,
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vma->vm_flags);
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status = remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
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vma->vm_end - vma->vm_start,
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vma->vm_page_prot);
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if (status != 0)
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status = -EAGAIN;
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return status;
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}
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static const struct file_operations bridge_fops = {
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.open = bridge_open,
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.release = bridge_release,
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.unlocked_ioctl = bridge_ioctl,
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.mmap = bridge_mmap,
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.llseek = noop_llseek,
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};
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#ifdef CONFIG_PM
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static u32 time_out = 1000;
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#ifdef CONFIG_TIDSPBRIDGE_DVFS
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s32 dsp_max_opps = VDD1_OPP5;
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#endif
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/* Maximum Opps that can be requested by IVA */
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/*vdd1 rate table */
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#ifdef CONFIG_TIDSPBRIDGE_DVFS
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const struct omap_opp vdd1_rate_table_bridge[] = {
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{0, 0, 0},
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/*OPP1 */
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{S125M, VDD1_OPP1, 0},
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/*OPP2 */
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{S250M, VDD1_OPP2, 0},
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/*OPP3 */
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{S500M, VDD1_OPP3, 0},
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/*OPP4 */
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{S550M, VDD1_OPP4, 0},
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/*OPP5 */
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{S600M, VDD1_OPP5, 0},
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};
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#endif
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#endif
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struct omap_dsp_platform_data *omap_dspbridge_pdata;
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u32 vdd1_dsp_freq[6][4] = {
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{0, 0, 0, 0},
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/*OPP1 */
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{0, 90000, 0, 86000},
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/*OPP2 */
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{0, 180000, 80000, 170000},
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/*OPP3 */
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{0, 360000, 160000, 340000},
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/*OPP4 */
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{0, 396000, 325000, 376000},
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/*OPP5 */
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{0, 430000, 355000, 430000},
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};
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#ifdef CONFIG_TIDSPBRIDGE_RECOVERY
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static void bridge_recover(struct work_struct *work)
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{
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struct dev_object *dev;
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struct cfg_devnode *dev_node;
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if (atomic_read(&bridge_cref)) {
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INIT_COMPLETION(bridge_comp);
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while (!wait_for_completion_timeout(&bridge_comp,
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msecs_to_jiffies(REC_TIMEOUT)))
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pr_info("%s:%d handle(s) still opened\n",
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__func__, atomic_read(&bridge_cref));
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}
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dev = dev_get_first();
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dev_get_dev_node(dev, &dev_node);
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if (!dev_node || proc_auto_start(dev_node, dev))
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pr_err("DSP could not be restarted\n");
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recover = false;
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complete_all(&bridge_open_comp);
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}
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void bridge_recover_schedule(void)
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{
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INIT_COMPLETION(bridge_open_comp);
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recover = true;
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queue_work(bridge_rec_queue, &bridge_recovery_work);
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}
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#endif
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#ifdef CONFIG_TIDSPBRIDGE_DVFS
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static int dspbridge_scale_notification(struct notifier_block *op,
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unsigned long val, void *ptr)
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{
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struct omap_dsp_platform_data *pdata =
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omap_dspbridge_dev->dev.platform_data;
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if (CPUFREQ_POSTCHANGE == val && pdata->dsp_get_opp)
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pwr_pm_post_scale(PRCM_VDD1, pdata->dsp_get_opp());
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return 0;
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}
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static struct notifier_block iva_clk_notifier = {
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.notifier_call = dspbridge_scale_notification,
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NULL,
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};
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#endif
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/**
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* omap3_bridge_startup() - perform low lever initializations
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* @pdev: pointer to platform device
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*
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* Initializes recovery, PM and DVFS required data, before calling
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* clk and memory init routines.
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*/
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static int omap3_bridge_startup(struct platform_device *pdev)
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{
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struct omap_dsp_platform_data *pdata = pdev->dev.platform_data;
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struct drv_data *drv_datap = NULL;
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u32 phys_membase, phys_memsize;
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int err;
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#ifdef CONFIG_TIDSPBRIDGE_RECOVERY
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bridge_rec_queue = create_workqueue("bridge_rec_queue");
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INIT_WORK(&bridge_recovery_work, bridge_recover);
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INIT_COMPLETION(bridge_comp);
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#endif
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#ifdef CONFIG_PM
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/* Initialize the wait queue */
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bridge_suspend_data.suspended = 0;
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init_waitqueue_head(&bridge_suspend_data.suspend_wq);
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#ifdef CONFIG_TIDSPBRIDGE_DVFS
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for (i = 0; i < 6; i++)
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pdata->mpu_speed[i] = vdd1_rate_table_bridge[i].rate;
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err = cpufreq_register_notifier(&iva_clk_notifier,
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CPUFREQ_TRANSITION_NOTIFIER);
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if (err)
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pr_err("%s: clk_notifier_register failed for iva2_ck\n",
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__func__);
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#endif
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#endif
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dsp_clk_init();
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drv_datap = kzalloc(sizeof(struct drv_data), GFP_KERNEL);
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if (!drv_datap) {
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err = -ENOMEM;
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goto err1;
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}
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drv_datap->shm_size = shm_size;
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drv_datap->tc_wordswapon = tc_wordswapon;
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if (base_img) {
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drv_datap->base_img = kmalloc(strlen(base_img) + 1, GFP_KERNEL);
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if (!drv_datap->base_img) {
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err = -ENOMEM;
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goto err2;
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}
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strncpy(drv_datap->base_img, base_img, strlen(base_img) + 1);
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}
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dev_set_drvdata(bridge, drv_datap);
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if (shm_size < 0x10000) { /* 64 KB */
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err = -EINVAL;
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pr_err("%s: shm size must be at least 64 KB\n", __func__);
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goto err3;
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}
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dev_dbg(bridge, "%s: requested shm_size = 0x%x\n", __func__, shm_size);
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phys_membase = pdata->phys_mempool_base;
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phys_memsize = pdata->phys_mempool_size;
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if (phys_membase > 0 && phys_memsize > 0)
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mem_ext_phys_pool_init(phys_membase, phys_memsize);
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if (tc_wordswapon)
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dev_dbg(bridge, "%s: TC Word Swap is enabled\n", __func__);
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driver_context = dsp_init(&err);
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if (err) {
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pr_err("DSP Bridge driver initialization failed\n");
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goto err4;
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}
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return 0;
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err4:
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mem_ext_phys_pool_release();
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err3:
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kfree(drv_datap->base_img);
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err2:
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kfree(drv_datap);
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err1:
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#ifdef CONFIG_TIDSPBRIDGE_DVFS
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cpufreq_unregister_notifier(&iva_clk_notifier,
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CPUFREQ_TRANSITION_NOTIFIER);
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#endif
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dsp_clk_exit();
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return err;
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}
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static int omap34_xx_bridge_probe(struct platform_device *pdev)
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{
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int err;
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dev_t dev = 0;
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#ifdef CONFIG_TIDSPBRIDGE_DVFS
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int i = 0;
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#endif
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omap_dspbridge_dev = pdev;
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/* Global bridge device */
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bridge = &omap_dspbridge_dev->dev;
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/* Bridge low level initializations */
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err = omap3_bridge_startup(pdev);
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if (err)
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goto err1;
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/* use 2.6 device model */
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err = alloc_chrdev_region(&dev, 0, 1, "DspBridge");
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if (err) {
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pr_err("%s: Can't get major %d\n", __func__, driver_major);
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goto err1;
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}
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cdev_init(&bridge_cdev, &bridge_fops);
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bridge_cdev.owner = THIS_MODULE;
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err = cdev_add(&bridge_cdev, dev, 1);
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if (err) {
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pr_err("%s: Failed to add bridge device\n", __func__);
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goto err2;
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}
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/* udev support */
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bridge_class = class_create(THIS_MODULE, "ti_bridge");
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if (IS_ERR(bridge_class)) {
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pr_err("%s: Error creating bridge class\n", __func__);
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goto err3;
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}
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driver_major = MAJOR(dev);
|
|
device_create(bridge_class, NULL, MKDEV(driver_major, 0),
|
|
NULL, "DspBridge");
|
|
pr_info("DSP Bridge driver loaded\n");
|
|
|
|
return 0;
|
|
|
|
err3:
|
|
cdev_del(&bridge_cdev);
|
|
err2:
|
|
unregister_chrdev_region(dev, 1);
|
|
err1:
|
|
return err;
|
|
}
|
|
|
|
static int omap34_xx_bridge_remove(struct platform_device *pdev)
|
|
{
|
|
dev_t devno;
|
|
int status = 0;
|
|
struct drv_data *drv_datap = dev_get_drvdata(bridge);
|
|
|
|
/* Retrieve the Object handle from the driver data */
|
|
if (!drv_datap || !drv_datap->drv_object) {
|
|
status = -ENODATA;
|
|
pr_err("%s: Failed to retrieve the object handle\n", __func__);
|
|
goto func_cont;
|
|
}
|
|
|
|
#ifdef CONFIG_TIDSPBRIDGE_DVFS
|
|
if (cpufreq_unregister_notifier(&iva_clk_notifier,
|
|
CPUFREQ_TRANSITION_NOTIFIER))
|
|
pr_err("%s: cpufreq_unregister_notifier failed for iva2_ck\n",
|
|
__func__);
|
|
#endif /* #ifdef CONFIG_TIDSPBRIDGE_DVFS */
|
|
|
|
if (driver_context) {
|
|
/* Put the DSP in reset state */
|
|
dsp_deinit(driver_context);
|
|
driver_context = 0;
|
|
}
|
|
|
|
kfree(drv_datap);
|
|
dev_set_drvdata(bridge, NULL);
|
|
|
|
func_cont:
|
|
mem_ext_phys_pool_release();
|
|
|
|
dsp_clk_exit();
|
|
|
|
devno = MKDEV(driver_major, 0);
|
|
cdev_del(&bridge_cdev);
|
|
unregister_chrdev_region(devno, 1);
|
|
if (bridge_class) {
|
|
/* remove the device from sysfs */
|
|
device_destroy(bridge_class, MKDEV(driver_major, 0));
|
|
class_destroy(bridge_class);
|
|
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int bridge_suspend(struct platform_device *pdev, pm_message_t state)
|
|
{
|
|
u32 status;
|
|
u32 command = PWR_EMERGENCYDEEPSLEEP;
|
|
|
|
status = pwr_sleep_dsp(command, time_out);
|
|
if (status)
|
|
return -1;
|
|
|
|
bridge_suspend_data.suspended = 1;
|
|
return 0;
|
|
}
|
|
|
|
static int bridge_resume(struct platform_device *pdev)
|
|
{
|
|
u32 status;
|
|
|
|
status = pwr_wake_dsp(time_out);
|
|
if (status)
|
|
return -1;
|
|
|
|
bridge_suspend_data.suspended = 0;
|
|
wake_up(&bridge_suspend_data.suspend_wq);
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static struct platform_driver bridge_driver = {
|
|
.driver = {
|
|
.name = "omap-dsp",
|
|
},
|
|
.probe = omap34_xx_bridge_probe,
|
|
.remove = omap34_xx_bridge_remove,
|
|
#ifdef CONFIG_PM
|
|
.suspend = bridge_suspend,
|
|
.resume = bridge_resume,
|
|
#endif
|
|
};
|
|
|
|
/* To remove all process resources before removing the process from the
|
|
* process context list */
|
|
int drv_remove_all_resources(void *process_ctxt)
|
|
{
|
|
int status = 0;
|
|
struct process_context *ctxt = (struct process_context *)process_ctxt;
|
|
drv_remove_all_strm_res_elements(ctxt);
|
|
drv_remove_all_node_res_elements(ctxt);
|
|
drv_remove_all_dmm_res_elements(ctxt);
|
|
ctxt->res_state = PROC_RES_FREED;
|
|
return status;
|
|
}
|
|
|
|
module_platform_driver(bridge_driver);
|