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Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of version 2 of the gnu general public license as published by the free software foundation this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 59 temple place suite 330 boston ma 02111 1307 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 24 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141334.606756275@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
73 lines
2.0 KiB
C
73 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/******************************************************************************
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AudioScience HPI driver
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Copyright (C) 1997-2012 AudioScience Inc. <support@audioscience.com>
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HPI Operating System function implementation for Linux
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(C) Copyright AudioScience Inc. 1997-2003
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******************************************************************************/
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#define SOURCEFILE_NAME "hpios.c"
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#include "hpi_internal.h"
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#include "hpidebug.h"
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#include <linux/delay.h>
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#include <linux/sched.h>
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void hpios_delay_micro_seconds(u32 num_micro_sec)
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{
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if ((usecs_to_jiffies(num_micro_sec) > 1) && !in_interrupt()) {
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/* MUST NOT SCHEDULE IN INTERRUPT CONTEXT! */
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schedule_timeout_uninterruptible(usecs_to_jiffies
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(num_micro_sec));
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} else if (num_micro_sec <= 2000)
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udelay(num_micro_sec);
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else
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mdelay(num_micro_sec / 1000);
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}
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/** Allocate an area of locked memory for bus master DMA operations.
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If allocation fails, return 1, and *pMemArea.size = 0
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*/
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u16 hpios_locked_mem_alloc(struct consistent_dma_area *p_mem_area, u32 size,
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struct pci_dev *pdev)
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{
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/*?? any benefit in using managed dmam_alloc_coherent? */
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p_mem_area->vaddr =
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dma_alloc_coherent(&pdev->dev, size, &p_mem_area->dma_handle,
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GFP_KERNEL);
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if (p_mem_area->vaddr) {
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HPI_DEBUG_LOG(DEBUG, "allocated %d bytes, dma 0x%x vma %p\n",
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size, (unsigned int)p_mem_area->dma_handle,
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p_mem_area->vaddr);
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p_mem_area->pdev = &pdev->dev;
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p_mem_area->size = size;
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return 0;
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} else {
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HPI_DEBUG_LOG(WARNING,
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"failed to allocate %d bytes locked memory\n", size);
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p_mem_area->size = 0;
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return 1;
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}
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}
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u16 hpios_locked_mem_free(struct consistent_dma_area *p_mem_area)
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{
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if (p_mem_area->size) {
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dma_free_coherent(p_mem_area->pdev, p_mem_area->size,
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p_mem_area->vaddr, p_mem_area->dma_handle);
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HPI_DEBUG_LOG(DEBUG, "freed %lu bytes, dma 0x%x vma %p\n",
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(unsigned long)p_mem_area->size,
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(unsigned int)p_mem_area->dma_handle,
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p_mem_area->vaddr);
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p_mem_area->size = 0;
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return 0;
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} else {
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return 1;
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}
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}
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